merge llvm libcxx 16.0.6

203 files changed, 3512 insertions, 36553 deletions

diff --git a/gnu/llvm/libcxx/benchmarks/algorithms.bench.cpp b/gnu/llvm/libcxx/benchmarks/algorithms.bench.cpp
deleted file mode 100644
index b259d476457..00000000000
--- a/gnu/llvm/libcxx/benchmarks/algorithms.bench.cpp
+++ /dev/null
@@ -1,276 +0,0 @@
-
-#include <algorithm>
-#include <cstdint>
-#include <map>
-#include <random>
-#include <string>
-#include <utility>
-#include <vector>
-
-#include "CartesianBenchmarks.h"
-#include "GenerateInput.h"
-#include "benchmark/benchmark.h"
-#include "test_macros.h"
-
-namespace {
-
-enum class ValueType { Uint32, String };
-struct AllValueTypes : EnumValuesAsTuple<AllValueTypes, ValueType, 2> {
-  static constexpr const char* Names[] = {"uint32", "string"};
-};
-
-template <class V>
-using Value =
-    std::conditional_t<V() == ValueType::Uint32, uint32_t, std::string>;
-
-enum class Order {
-  Random,
-  Ascending,
-  Descending,
-  SingleElement,
-  PipeOrgan,
-  Heap
-};
-struct AllOrders : EnumValuesAsTuple<AllOrders, Order, 6> {
-  static constexpr const char* Names[] = {"Random",     "Ascending",
-                                          "Descending", "SingleElement",
-                                          "PipeOrgan",  "Heap"};
-};
-
-void fillValues(std::vector<uint32_t>& V, size_t N, Order O) {
-  if (O == Order::SingleElement) {
-    V.resize(N, 0);
-  } else {
-    while (V.size() < N)
-      V.push_back(V.size());
-  }
-}
-
-void fillValues(std::vector<std::string>& V, size_t N, Order O) {
-
-  if (O == Order::SingleElement) {
-    V.resize(N, getRandomString(1024));
-  } else {
-    while (V.size() < N)
-      V.push_back(getRandomString(1024));
-  }
-}
-
-template <class T>
-void sortValues(T& V, Order O) {
-  assert(std::is_sorted(V.begin(), V.end()));
-  switch (O) {
-  case Order::Random: {
-    std::random_device R;
-    std::mt19937 M(R());
-    std::shuffle(V.begin(), V.end(), M);
-    break;
-  }
-  case Order::Ascending:
-    std::sort(V.begin(), V.end());
-    break;
-  case Order::Descending:
-    std::sort(V.begin(), V.end(), std::greater<>());
-    break;
-  case Order::SingleElement:
-    // Nothing to do
-    break;
-  case Order::PipeOrgan:
-    std::sort(V.begin(), V.end());
-    std::reverse(V.begin() + V.size() / 2, V.end());
-    break;
-  case Order::Heap:
-    std::make_heap(V.begin(), V.end());
-    break;
-  }
-}
-
-template <class ValueType>
-std::vector<std::vector<Value<ValueType> > > makeOrderedValues(size_t N,
-                                                               Order O) {
-  // Let's make sure that all random sequences of the same size are the same.
-  // That way we can compare the different algorithms with the same input.
-  static std::map<std::pair<size_t, Order>, std::vector<Value<ValueType> > >
-      Cached;
-
-  auto& Values = Cached[{N, O}];
-  if (Values.empty()) {
-    fillValues(Values, N, O);
-    sortValues(Values, O);
-  };
-  const size_t NumCopies = std::max(size_t{1}, 1000 / N);
-  return { NumCopies, Values };
-}
-
-template <class T, class U>
-TEST_ALWAYS_INLINE void resetCopies(benchmark::State& state, T& Copies,
-                                    U& Orig) {
-  state.PauseTiming();
-  for (auto& Copy : Copies)
-    Copy = Orig;
-  state.ResumeTiming();
-}
-
-template <class ValueType, class F>
-void runOpOnCopies(benchmark::State& state, size_t Quantity, Order O,
-                   bool CountElements, F f) {
-  auto Copies = makeOrderedValues<ValueType>(Quantity, O);
-  const auto Orig = Copies[0];
-
-  const size_t Batch = CountElements ? Copies.size() * Quantity : Copies.size();
-  while (state.KeepRunningBatch(Batch)) {
-    for (auto& Copy : Copies) {
-      f(Copy);
-      benchmark::DoNotOptimize(Copy);
-    }
-    resetCopies(state, Copies, Orig);
-  }
-}
-
-template <class ValueType, class Order>
-struct Sort {
-  size_t Quantity;
-
-  void run(benchmark::State& state) const {
-    runOpOnCopies<ValueType>(state, Quantity, Order(), false, [](auto& Copy) {
-      std::sort(Copy.begin(), Copy.end());
-    });
-  }
-
-  bool skip() const { return Order() == ::Order::Heap; }
-
-  std::string name() const {
-    return "BM_Sort" + ValueType::name() + Order::name() + "_" +
-           std::to_string(Quantity);
-  };
-};
-
-template <class ValueType, class Order>
-struct StableSort {
-  size_t Quantity;
-
-  void run(benchmark::State& state) const {
-    runOpOnCopies<ValueType>(state, Quantity, Order(), false, [](auto& Copy) {
-      std::stable_sort(Copy.begin(), Copy.end());
-    });
-  }
-
-  bool skip() const { return Order() == ::Order::Heap; }
-
-  std::string name() const {
-    return "BM_StableSort" + ValueType::name() + Order::name() + "_" +
-           std::to_string(Quantity);
-  };
-};
-
-template <class ValueType, class Order>
-struct MakeHeap {
-  size_t Quantity;
-
-  void run(benchmark::State& state) const {
-    runOpOnCopies<ValueType>(state, Quantity, Order(), false, [](auto& Copy) {
-      std::make_heap(Copy.begin(), Copy.end());
-    });
-  }
-
-  std::string name() const {
-    return "BM_MakeHeap" + ValueType::name() + Order::name() + "_" +
-           std::to_string(Quantity);
-  };
-};
-
-template <class ValueType>
-struct SortHeap {
-  size_t Quantity;
-
-  void run(benchmark::State& state) const {
-    runOpOnCopies<ValueType>(
-        state, Quantity, Order::Heap, false,
-        [](auto& Copy) { std::sort_heap(Copy.begin(), Copy.end()); });
-  }
-
-  std::string name() const {
-    return "BM_SortHeap" + ValueType::name() + "_" + std::to_string(Quantity);
-  };
-};
-
-template <class ValueType, class Order>
-struct MakeThenSortHeap {
-  size_t Quantity;
-
-  void run(benchmark::State& state) const {
-    runOpOnCopies<ValueType>(state, Quantity, Order(), false, [](auto& Copy) {
-      std::make_heap(Copy.begin(), Copy.end());
-      std::sort_heap(Copy.begin(), Copy.end());
-    });
-  }
-
-  std::string name() const {
-    return "BM_MakeThenSortHeap" + ValueType::name() + Order::name() + "_" +
-           std::to_string(Quantity);
-  };
-};
-
-template <class ValueType, class Order>
-struct PushHeap {
-  size_t Quantity;
-
-  void run(benchmark::State& state) const {
-    runOpOnCopies<ValueType>(state, Quantity, Order(), true, [](auto& Copy) {
-      for (auto I = Copy.begin(), E = Copy.end(); I != E; ++I) {
-        std::push_heap(Copy.begin(), I + 1);
-      }
-    });
-  }
-
-  bool skip() const { return Order() == ::Order::Heap; }
-
-  std::string name() const {
-    return "BM_PushHeap" + ValueType::name() + Order::name() + "_" +
-           std::to_string(Quantity);
-  };
-};
-
-template <class ValueType>
-struct PopHeap {
-  size_t Quantity;
-
-  void run(benchmark::State& state) const {
-    runOpOnCopies<ValueType>(state, Quantity, Order(), true, [](auto& Copy) {
-      for (auto B = Copy.begin(), I = Copy.end(); I != B; --I) {
-        std::pop_heap(B, I);
-      }
-    });
-  }
-
-  std::string name() const {
-    return "BM_PopHeap" + ValueType::name() + "_" + std::to_string(Quantity);
-  };
-};
-
-} // namespace
-
-int main(int argc, char** argv) {
-  benchmark::Initialize(&argc, argv);
-  if (benchmark::ReportUnrecognizedArguments(argc, argv))
-    return 1;
-
-  const std::vector<size_t> Quantities = {1 << 0, 1 << 2,  1 << 4,  1 << 6,
-                                          1 << 8, 1 << 10, 1 << 14,
-    // Running each benchmark in parallel consumes too much memory with MSAN
-    // and can lead to the test process being killed.
-#if !TEST_HAS_FEATURE(memory_sanitizer)
-                                          1 << 18
-#endif
-  };
-  makeCartesianProductBenchmark<Sort, AllValueTypes, AllOrders>(Quantities);
-  makeCartesianProductBenchmark<StableSort, AllValueTypes, AllOrders>(
-      Quantities);
-  makeCartesianProductBenchmark<MakeHeap, AllValueTypes, AllOrders>(Quantities);
-  makeCartesianProductBenchmark<SortHeap, AllValueTypes>(Quantities);
-  makeCartesianProductBenchmark<MakeThenSortHeap, AllValueTypes, AllOrders>(
-      Quantities);
-  makeCartesianProductBenchmark<PushHeap, AllValueTypes, AllOrders>(Quantities);
-  makeCartesianProductBenchmark<PopHeap, AllValueTypes>(Quantities);
-  benchmark::RunSpecifiedBenchmarks();
-}
diff --git a/gnu/llvm/libcxx/cmake/Modules/DefineLinkerScript.cmake b/gnu/llvm/libcxx/cmake/Modules/DefineLinkerScript.cmake
deleted file mode 100644
index 2e68121f618..00000000000
--- a/gnu/llvm/libcxx/cmake/Modules/DefineLinkerScript.cmake
+++ /dev/null
@@ -1,52 +0,0 @@
-# This function defines a linker script in place of the symlink traditionally
-# created for shared libraries.
-#
-# More specifically, this function goes through the PUBLIC and INTERFACE
-# library dependencies of <target> and gathers them into a linker script,
-# such that those libraries are linked against when the shared library for
-# <target> is linked against.
-#
-# Arguments:
-#   <target>: A target representing a shared library. A linker script will be
-#             created in place of that target's TARGET_LINKER_FILE, which is
-#             the symlink pointing to the actual shared library (usually
-#             libFoo.so pointing to libFoo.so.1, which itself points to
-#             libFoo.so.1.0).
-
-function(define_linker_script target)
-  if (NOT TARGET "${target}")
-    message(FATAL_ERROR "The provided target '${target}' is not actually a target.")
-  endif()
-
-  get_target_property(target_type "${target}" TYPE)
-  if (NOT "${target_type}" STREQUAL "SHARED_LIBRARY")
-    message(FATAL_ERROR "The provided target '${target}' is not a shared library (its type is '${target_type}').")
-  endif()
-
-  set(symlink "$<TARGET_LINKER_FILE:${target}>")
-  set(soname "$<TARGET_SONAME_FILE_NAME:${target}>")
-
-  get_target_property(interface_libs "${target}" INTERFACE_LINK_LIBRARIES)
-
-  set(link_libraries)
-  if (interface_libs)
-    foreach(lib IN LISTS interface_libs)
-      if (TARGET "${lib}" OR
-          (${lib} MATCHES "cxxabi(_static|_shared)?" AND HAVE_LIBCXXABI) OR
-          (${lib} MATCHES "unwind(_static|_shared)?" AND HAVE_LIBUNWIND))
-        list(APPEND link_libraries "${CMAKE_LINK_LIBRARY_FLAG}$<TARGET_PROPERTY:${lib},OUTPUT_NAME>")
-      else()
-        list(APPEND link_libraries "${CMAKE_LINK_LIBRARY_FLAG}${lib}")
-      endif()
-    endforeach()
-  endif()
-  string(REPLACE ";" " " link_libraries "${link_libraries}")
-
-  set(linker_script "INPUT(${soname} ${link_libraries})")
-  add_custom_command(TARGET "${target}" POST_BUILD
-    COMMAND "${CMAKE_COMMAND}" -E remove "${symlink}"
-    COMMAND "${CMAKE_COMMAND}" -E echo "${linker_script}" > "${symlink}"
-    COMMENT "Generating linker script: '${linker_script}' as file ${symlink}"
-    VERBATIM
-  )
-endfunction()
diff --git a/gnu/llvm/libcxx/cmake/Modules/HandleCompilerRT.cmake b/gnu/llvm/libcxx/cmake/Modules/HandleCompilerRT.cmake
deleted file mode 100644
index 1ce25657494..00000000000
--- a/gnu/llvm/libcxx/cmake/Modules/HandleCompilerRT.cmake
+++ /dev/null
@@ -1,64 +0,0 @@
-function(find_compiler_rt_library name dest)
-  if (NOT DEFINED LIBCXX_COMPILE_FLAGS)
-    message(FATAL_ERROR "LIBCXX_COMPILE_FLAGS must be defined when using this function")
-  endif()
-  set(dest "" PARENT_SCOPE)
-  set(CLANG_COMMAND ${CMAKE_CXX_COMPILER} ${LIBCXX_COMPILE_FLAGS}
-      "--rtlib=compiler-rt" "--print-libgcc-file-name")
-  if (CMAKE_CXX_COMPILER_ID MATCHES Clang AND CMAKE_CXX_COMPILER_TARGET)
-    list(APPEND CLANG_COMMAND "--target=${CMAKE_CXX_COMPILER_TARGET}")
-  endif()
-  get_property(LIBCXX_CXX_FLAGS CACHE CMAKE_CXX_FLAGS PROPERTY VALUE)
-  string(REPLACE " " ";" LIBCXX_CXX_FLAGS "${LIBCXX_CXX_FLAGS}")
-  list(APPEND CLANG_COMMAND ${LIBCXX_CXX_FLAGS})
-  execute_process(
-      COMMAND ${CLANG_COMMAND}
-      RESULT_VARIABLE HAD_ERROR
-      OUTPUT_VARIABLE LIBRARY_FILE
-  )
-  string(STRIP "${LIBRARY_FILE}" LIBRARY_FILE)
-  file(TO_CMAKE_PATH "${LIBRARY_FILE}" LIBRARY_FILE)
-  string(REPLACE "builtins" "${name}" LIBRARY_FILE "${LIBRARY_FILE}")
-  if (NOT HAD_ERROR AND EXISTS "${LIBRARY_FILE}")
-    message(STATUS "Found compiler-rt library: ${LIBRARY_FILE}")
-    set(${dest} "${LIBRARY_FILE}" PARENT_SCOPE)
-  else()
-    message(STATUS "Failed to find compiler-rt library")
-  endif()
-endfunction()
-
-function(find_compiler_rt_dir dest)
-  if (NOT DEFINED LIBCXX_COMPILE_FLAGS)
-    message(FATAL_ERROR "LIBCXX_COMPILE_FLAGS must be defined when using this function")
-  endif()
-  set(dest "" PARENT_SCOPE)
-  if (APPLE)
-    set(CLANG_COMMAND ${CMAKE_CXX_COMPILER} ${LIBCXX_COMPILE_FLAGS}
-        "-print-file-name=lib")
-    execute_process(
-        COMMAND ${CLANG_COMMAND}
-        RESULT_VARIABLE HAD_ERROR
-        OUTPUT_VARIABLE LIBRARY_DIR
-    )
-    string(STRIP "${LIBRARY_DIR}" LIBRARY_DIR)
-    file(TO_CMAKE_PATH "${LIBRARY_DIR}" LIBRARY_DIR)
-    set(LIBRARY_DIR "${LIBRARY_DIR}/darwin")
-  else()
-    set(CLANG_COMMAND ${CMAKE_CXX_COMPILER} ${LIBCXX_COMPILE_FLAGS}
-        "--rtlib=compiler-rt" "--print-libgcc-file-name")
-    execute_process(
-        COMMAND ${CLANG_COMMAND}
-        RESULT_VARIABLE HAD_ERROR
-        OUTPUT_VARIABLE LIBRARY_FILE
-    )
-    string(STRIP "${LIBRARY_FILE}" LIBRARY_FILE)
-    file(TO_CMAKE_PATH "${LIBRARY_FILE}" LIBRARY_FILE)
-    get_filename_component(LIBRARY_DIR "${LIBRARY_FILE}" DIRECTORY)
-  endif()
-  if (NOT HAD_ERROR AND EXISTS "${LIBRARY_DIR}")
-    message(STATUS "Found compiler-rt directory: ${LIBRARY_DIR}")
-    set(${dest} "${LIBRARY_DIR}" PARENT_SCOPE)
-  else()
-    message(STATUS "Failed to find compiler-rt directory")
-  endif()
-endfunction()
diff --git a/gnu/llvm/libcxx/cmake/Modules/HandleOutOfTreeLLVM.cmake b/gnu/llvm/libcxx/cmake/Modules/HandleOutOfTreeLLVM.cmake
deleted file mode 100644
index 5746afb5eb3..00000000000
--- a/gnu/llvm/libcxx/cmake/Modules/HandleOutOfTreeLLVM.cmake
+++ /dev/null
@@ -1,142 +0,0 @@
-macro(find_llvm_parts)
-# Rely on llvm-config.
-  set(CONFIG_OUTPUT)
-  if(NOT LLVM_CONFIG_PATH)
-    find_program(LLVM_CONFIG_PATH "llvm-config")
-  endif()
-  if(DEFINED LLVM_PATH)
-    set(LLVM_INCLUDE_DIR ${LLVM_INCLUDE_DIR} CACHE PATH "Path to llvm/include")
-    set(LLVM_PATH ${LLVM_PATH} CACHE PATH "Path to LLVM source tree")
-    set(LLVM_MAIN_SRC_DIR ${LLVM_PATH})
-    set(LLVM_CMAKE_PATH "${LLVM_PATH}/cmake/modules")
-    if (NOT IS_DIRECTORY "${LLVM_PATH}")
-      message(FATAL_ERROR "The provided LLVM_PATH (${LLVM_PATH}) is not a valid directory")
-    endif()
-  elseif(LLVM_CONFIG_PATH)
-    message(STATUS "Found LLVM_CONFIG_PATH as ${LLVM_CONFIG_PATH}")
-    set(LIBCXX_USING_INSTALLED_LLVM 1)
-    set(CONFIG_COMMAND ${LLVM_CONFIG_PATH}
-      "--includedir"
-      "--prefix"
-      "--src-root")
-    execute_process(
-      COMMAND ${CONFIG_COMMAND}
-      RESULT_VARIABLE HAD_ERROR
-      OUTPUT_VARIABLE CONFIG_OUTPUT
-    )
-    if(NOT HAD_ERROR)
-      string(REGEX REPLACE
-        "[ \t]*[\r\n]+[ \t]*" ";"
-        CONFIG_OUTPUT ${CONFIG_OUTPUT})
-    else()
-      string(REPLACE ";" " " CONFIG_COMMAND_STR "${CONFIG_COMMAND}")
-      message(STATUS "${CONFIG_COMMAND_STR}")
-      message(FATAL_ERROR "llvm-config failed with status ${HAD_ERROR}")
-    endif()
-
-    list(GET CONFIG_OUTPUT 0 INCLUDE_DIR)
-    list(GET CONFIG_OUTPUT 1 LLVM_OBJ_ROOT)
-    list(GET CONFIG_OUTPUT 2 MAIN_SRC_DIR)
-
-    set(LLVM_INCLUDE_DIR ${INCLUDE_DIR} CACHE PATH "Path to llvm/include")
-    set(LLVM_BINARY_DIR ${LLVM_OBJ_ROOT} CACHE PATH "Path to LLVM build tree")
-    set(LLVM_MAIN_SRC_DIR ${MAIN_SRC_DIR} CACHE PATH "Path to LLVM source tree")
-
-    # --cmakedir is supported since llvm r291218 (4.0 release)
-    execute_process(
-      COMMAND ${LLVM_CONFIG_PATH} --cmakedir
-      RESULT_VARIABLE HAD_ERROR
-      OUTPUT_VARIABLE CONFIG_OUTPUT
-      ERROR_QUIET)
-    if(NOT HAD_ERROR)
-      string(STRIP "${CONFIG_OUTPUT}" LLVM_CMAKE_PATH_FROM_LLVM_CONFIG)
-      file(TO_CMAKE_PATH "${LLVM_CMAKE_PATH_FROM_LLVM_CONFIG}" LLVM_CMAKE_PATH)
-    else()
-      file(TO_CMAKE_PATH "${LLVM_BINARY_DIR}" LLVM_BINARY_DIR_CMAKE_STYLE)
-      set(LLVM_CMAKE_PATH "${LLVM_BINARY_DIR_CMAKE_STYLE}/lib${LLVM_LIBDIR_SUFFIX}/cmake/llvm")
-    endif()
-  else()
-    set(LLVM_FOUND OFF)
-    message(WARNING "UNSUPPORTED LIBCXX CONFIGURATION DETECTED: "
-                    "llvm-config not found and LLVM_PATH not defined.\n"
-                    "Reconfigure with -DLLVM_CONFIG_PATH=path/to/llvm-config "
-                    "or -DLLVM_PATH=path/to/llvm-source-root.")
-    return()
-  endif()
-
-  if (EXISTS "${LLVM_CMAKE_PATH}")
-    list(APPEND CMAKE_MODULE_PATH "${LLVM_CMAKE_PATH}")
-  elseif (EXISTS "${LLVM_MAIN_SRC_DIR}/cmake/modules")
-    list(APPEND CMAKE_MODULE_PATH "${LLVM_MAIN_SRC_DIR}/cmake/modules")
-  else()
-    set(LLVM_FOUND OFF)
-    message(WARNING "Neither ${LLVM_CMAKE_PATH} nor ${LLVM_MAIN_SRC_DIR}/cmake/modules found")
-    return()
-  endif()
-
-  set(LLVM_FOUND ON)
-endmacro(find_llvm_parts)
-
-macro(configure_out_of_tree_llvm)
-  message(STATUS "Configuring for standalone build.")
-  set(LIBCXX_STANDALONE_BUILD 1)
-
-  find_llvm_parts()
-
-  # Add LLVM Functions --------------------------------------------------------
-  if (LLVM_FOUND AND LIBCXX_USING_INSTALLED_LLVM)
-    include(LLVMConfig) # For TARGET_TRIPLE
-  else()
-    if (WIN32)
-      set(LLVM_ON_UNIX 0)
-      set(LLVM_ON_WIN32 1)
-    else()
-      set(LLVM_ON_UNIX 1)
-      set(LLVM_ON_WIN32 0)
-    endif()
-  endif()
-  if (LLVM_FOUND)
-    include(AddLLVM OPTIONAL)
-  endif()
-
-  # LLVM Options --------------------------------------------------------------
-  if (NOT DEFINED LLVM_INCLUDE_TESTS)
-    set(LLVM_INCLUDE_TESTS ${LLVM_FOUND})
-  endif()
-  if (NOT DEFINED LLVM_INCLUDE_DOCS)
-    set(LLVM_INCLUDE_DOCS ${LLVM_FOUND})
-  endif()
-  if (NOT DEFINED LLVM_ENABLE_SPHINX)
-    set(LLVM_ENABLE_SPHINX OFF)
-  endif()
-
-  # In a standalone build, we don't have llvm to automatically generate the
-  # llvm-lit script for us.  So we need to provide an explicit directory that
-  # the configurator should write the script into.
-  set(LLVM_LIT_OUTPUT_DIR "${libcxx_BINARY_DIR}/bin")
-
-  if (LLVM_INCLUDE_TESTS)
-    # Required LIT Configuration ------------------------------------------------
-    # Define the default arguments to use with 'lit', and an option for the user
-    # to override.
-    set(LLVM_DEFAULT_EXTERNAL_LIT "${LLVM_MAIN_SRC_DIR}/utils/lit/lit.py")
-    set(LIT_ARGS_DEFAULT "-sv --show-xfail --show-unsupported")
-    if (MSVC OR XCODE)
-      set(LIT_ARGS_DEFAULT "${LIT_ARGS_DEFAULT} --no-progress-bar")
-    endif()
-    set(LLVM_LIT_ARGS "${LIT_ARGS_DEFAULT}" CACHE STRING "Default options for lit")
-  endif()
-
-  # Required doc configuration
-  if (LLVM_ENABLE_SPHINX)
-    find_package(Sphinx REQUIRED)
-  endif()
-
-  if (LLVM_ON_UNIX AND NOT APPLE)
-    set(LLVM_HAVE_LINK_VERSION_SCRIPT 1)
-  else()
-    set(LLVM_HAVE_LINK_VERSION_SCRIPT 0)
-  endif()
-endmacro(configure_out_of_tree_llvm)
-
-configure_out_of_tree_llvm()
diff --git a/gnu/llvm/libcxx/cmake/caches/Generic-32bits.cmake b/gnu/llvm/libcxx/cmake/caches/Generic-32bits.cmake
deleted file mode 100644
index ae7b2ac3e8d..00000000000
--- a/gnu/llvm/libcxx/cmake/caches/Generic-32bits.cmake
+++ /dev/null
@@ -1 +0,0 @@
-set(LLVM_BUILD_32_BITS ON CACHE BOOL "")
diff --git a/gnu/llvm/libcxx/cmake/caches/Generic-debug-iterators.cmake b/gnu/llvm/libcxx/cmake/caches/Generic-debug-iterators.cmake
deleted file mode 100644
index 2e9cbf77acd..00000000000
--- a/gnu/llvm/libcxx/cmake/caches/Generic-debug-iterators.cmake
+++ /dev/null
@@ -1,2 +0,0 @@
-set(LIBCXX_TEST_PARAMS "debug_level=1" "additional_features=LIBCXX-DEBUG-FIXME" CACHE STRING "")
-set(LIBCXXABI_TEST_PARAMS "${LIBCXX_TEST_PARAMS}" CACHE STRING "")
diff --git a/gnu/llvm/libcxx/cmake/caches/Generic-no-debug.cmake b/gnu/llvm/libcxx/cmake/caches/Generic-no-debug.cmake
deleted file mode 100644
index a62760fa78f..00000000000
--- a/gnu/llvm/libcxx/cmake/caches/Generic-no-debug.cmake
+++ /dev/null
@@ -1 +0,0 @@
-set(LIBCXX_ENABLE_DEBUG_MODE_SUPPORT OFF CACHE BOOL "")
diff --git a/gnu/llvm/libcxx/cmake/caches/Generic-singlethreaded.cmake b/gnu/llvm/libcxx/cmake/caches/Generic-singlethreaded.cmake
deleted file mode 100644
index 616baef1be7..00000000000
--- a/gnu/llvm/libcxx/cmake/caches/Generic-singlethreaded.cmake
+++ /dev/null
@@ -1,3 +0,0 @@
-set(LIBCXX_ENABLE_THREADS OFF CACHE BOOL "")
-set(LIBCXXABI_ENABLE_THREADS OFF CACHE BOOL "")
-set(LIBCXX_ENABLE_MONOTONIC_CLOCK OFF CACHE BOOL "")
diff --git a/gnu/llvm/libcxx/docs/Makefile.sphinx b/gnu/llvm/libcxx/docs/Makefile.sphinx
deleted file mode 100644
index a34f0cc0bad..00000000000
--- a/gnu/llvm/libcxx/docs/Makefile.sphinx
+++ /dev/null
@@ -1,37 +0,0 @@
-# Makefile for Sphinx documentation
-#
-# FIXME: This hack is only in place to allow the libcxx.llvm.org/docs builder
-# to work with libcxx. This should be removed when that builder supports
-# out-of-tree builds.
-
-# You can set these variables from the command line.
-SPHINXOPTS    = -n -W -v
-SPHINXBUILD   = sphinx-build
-PAPER         =
-BUILDDIR      = _build
-
-# Internal variables.
-PAPEROPT_a4     = -D latex_paper_size=a4
-PAPEROPT_letter = -D latex_paper_size=letter
-ALLSPHINXOPTS   = -d $(BUILDDIR)/doctrees $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) .
-# the i18n builder cannot share the environment and doctrees with the others
-I18NSPHINXOPTS  = $(PAPEROPT_$(PAPER)) $(SPHINXOPTS) .
-
-.PHONY: help clean html dirhtml singlehtml pickle json htmlhelp qthelp devhelp epub latex latexpdf text man changes linkcheck doctest gettext default
-
-default: html
-
-help:
-	@echo "Please use \`make <target>' where <target> is one of"
-	@echo "  html       to make standalone HTML files"
-
-clean:
-	-rm -rf $(BUILDDIR)/*
-
-html:
-	$(SPHINXBUILD) -b html $(ALLSPHINXOPTS) $(BUILDDIR)/html
-	@echo
-	@# FIXME: Remove this `cp` once HTML->Sphinx transition is completed.
-	@# Kind of a hack, but HTML-formatted docs are on the way out anyway.
-	@echo "Build finished. The HTML pages are in $(BUILDDIR)/html."
-
diff --git a/gnu/llvm/libcxx/docs/Status/RangesIssues.csv b/gnu/llvm/libcxx/docs/Status/RangesIssues.csv
deleted file mode 100644
index 4cd6c3d1122..00000000000
--- a/gnu/llvm/libcxx/docs/Status/RangesIssues.csv
+++ /dev/null
@@ -1,80 +0,0 @@
-"Number","Name","Status","Assignee"
-`P0896R4 <https://wg21.link/P0896R4>`__,<ranges>,,
-`P1035R7 <https://wg21.link/P1035R7>`__,Input Range Adaptors,,
-`P1207R4 <https://wg21.link/P1207R4>`__,Movability Of Single-Pass Iterators,,
-`P1243R4 <https://wg21.link/P1243R4>`__,Rangify New Algorithms,,
-`P1248R1 <https://wg21.link/P1248R1>`__,Fixing Relations,,
-`P1252R2 <https://wg21.link/P1252R2>`__,Ranges Design Cleanup,,
-`P1391R4 <https://wg21.link/P1391R4>`__,Range Constructor For string_view,,
-`P1456R1 <https://wg21.link/P1456R1>`__,Move-Only Views,,
-`P1474R1 <https://wg21.link/P1474R1>`__,Helpful Pointers For contiguous_iterator,,
-`P1522R1 <https://wg21.link/P1522R1>`__,Iterator Difference Type And Integer Overflow,,
-`P1523R1 <https://wg21.link/P1523R1>`__,Views And Size Types,,
-`P1638R1 <https://wg21.link/P1638R1>`__,basic_istream_view::iterator Should Not Be Copyable,,
-`P1716R3 <https://wg21.link/P1716R3>`__,Range Comparison Algorithms Are Over-Constrained,,
-`P1739R4 <https://wg21.link/P1739R4>`__,Avoiding Template Bloat For Ranges,,
-`P1862R1 <https://wg21.link/P1862R1>`__,Range Adaptors For Non-Copyable Iterators,,
-`P1870R1 <https://wg21.link/P1870R1>`__,safe_range,,
-`P1871R1 <https://wg21.link/P1871R1>`__,disable_sized_sentinel_for,,
-`P1878R1 <https://wg21.link/P1878R1>`__,Constraining Readable Types,,
-`P1970R2 <https://wg21.link/P1970R2>`__,ranges::ssize,,
-`P1983R0 <https://wg21.link/P1983R0>`__,Fixing Minor Ranges Issues,,
-`P1994R1 <https://wg21.link/P1994R1>`__,elements_view Needs Its Own sentinel,,
-`P2091R0 <https://wg21.link/P2091R0>`__,Fixing Issues With Range Access CPOs,,
-`P2106R0 <https://wg21.link/P2106R0>`__,Range Algorithm Result Types,,
-
-`P2325R3 <https://wg21.link/P2325R3>`__,Views should not be required to be default constructible ,,
-`P2328R1 <https://wg21.link/P2328R1>`__,join_view should join all views of ranges,,
-`P2210R2 <https://wg21.link/P2210R2>`__,Superior String Splitting,,
-`P2281R1 <https://wg21.link/P2281R1>`__,Clarifying range adaptor objects,,
-`P2367R0 <https://wg21.link/P2367R0>`__,Remove misuses of list-initialization from Clause 24,,
-
-`LWG3169 <https://wg21.link/lwg3169>`__, ranges permutation generators discard useful information,,
-`LWG3173 <https://wg21.link/lwg3173>`__, Enable CTAD for ref-view,,
-`LWG3179 <https://wg21.link/lwg3179>`__, subrange should always model Range,,
-`LWG3180 <https://wg21.link/lwg3180>`__, Inconsistently named return type for ranges::minmax_element,,
-`LWG3183 <https://wg21.link/lwg3183>`__, Normative permission to specialize Ranges variable templates,,
-`LWG3186 <https://wg21.link/lwg3186>`__, "ranges removal, partition, and partial_sort_copy algorithms discard useful information",,
-`LWG3191 <https://wg21.link/lwg3191>`__, std::ranges::shuffle synopsis does not match algorithm definition,,
-`LWG3276 <https://wg21.link/lwg3276>`__, Class split_view::outer_iterator::value_type should inherit from view_interface,,
-`LWG3280 <https://wg21.link/lwg3280>`__, View converting constructors can cause constraint recursion and are unneeded,,
-`LWG3281 <https://wg21.link/lwg3281>`__, Conversion from pair-like types to subrange is a silent semantic promotion,,
-`LWG3282 <https://wg21.link/lwg3282>`__, subrange converting constructor should disallow derived to base conversions,,
-`LWG3286 <https://wg21.link/lwg3286>`__, ranges::size is not required to be valid after a call to ranges::begin on an input range,,
-`LWG3291 <https://wg21.link/lwg3291>`__, iota_view::iterator has the wrong iterator_category,,
-`LWG3292 <https://wg21.link/lwg3292>`__, iota_view is under-constrained,,
-`LWG3299 <https://wg21.link/lwg3299>`__, Pointers don't need customized iterator behavior,,
-`LWG3301 <https://wg21.link/lwg3301>`__, transform_view::iterator has incorrect iterator_category,,
-`LWG3302 <https://wg21.link/lwg3302>`__, Range adaptor objects keys and values are unspecified,,
-`LWG3313 <https://wg21.link/lwg3313>`__, join_view::iterator::operator-- is incorrectly constrained,,
-`LWG3323 <https://wg21.link/lwg3323>`__, has-tuple-element helper concept needs convertible_to,,
-`LWG3325 <https://wg21.link/lwg3325>`__, Constrain return type of transformation function for transform_view,,
-`LWG3335 <https://wg21.link/lwg3335>`__, range_size_t and views::all_t,,
-`LWG3355 <https://wg21.link/lwg3355>`__, The memory algorithms should support move-only input iterators introduced by P1207,,
-`LWG3363 <https://wg21.link/lwg3363>`__, drop_while_view should opt-out of sized_range,,
-`LWG3364 <https://wg21.link/lwg3364>`__, Initialize data members of ranges and their iterators,,
-`LWG3381 <https://wg21.link/lwg3381>`__, begin and data must agree for contiguous_range,,
-`LWG3384 <https://wg21.link/lwg3384>`__, transform_view::sentinel has an incorrect operator-,,
-`LWG3385 <https://wg21.link/lwg3385>`__, common_iterator is not sufficiently constrained for non-copyable iterators,,
-`LWG3387 <https://wg21.link/lwg3387>`__, [range.reverse.view] reverse_view<V> unintentionally requires range<const V>,,
-`LWG3388 <https://wg21.link/lwg3388>`__, view iterator types have ill-formed <=> operators,,
-`LWG3389 <https://wg21.link/lwg3389>`__, A move-only iterator still does not have a counted_iterator,,
-`LWG3397 <https://wg21.link/lwg3397>`__, ranges::basic_istream_view::iterator should not provide iterator_category,,
-`LWG3398 <https://wg21.link/lwg3398>`__, tuple_element_t is also wrong for const subrange,,
-`LWG3474 <https://wg21.link/lwg3474>`__, Nesting join_views is broken because of CTAD,,
-`LWG3481 <https://wg21.link/LWG3481>`__,"viewable_range mishandles lvalue move-only views",,
-`LWG3500 <https://wg21.link/lwg3500>`__, join_view::iterator::operator->() is bogus,,
-`LWG3505 <https://wg21.link/lwg3505>`__, split_view::outer-iterator::operator++ misspecified,,
-`LWG3517 <https://wg21.link/LWG3517>`__,"join_view::iterator's iter_swap is underconstrained",,
-`LWG3520 <https://wg21.link/LWG3520>`__,"iter_move and iter_swap are inconsistent for transform_view::iterator",,
-`LWG3522 <https://wg21.link/LWG3522>`__,"Missing requirement on InputIterator template parameter for priority_queue constructors",,
-`LWG3523 <https://wg21.link/LWG3523>`__,"iota_view::sentinel is not always iota_view's sentinel",,
-`LWG3532 <https://wg21.link/LWG3532>`__,"split_view<V, P>::inner-iterator<true>::operator++(int) should depend on Base",,
-`LWG3533 <https://wg21.link/LWG3533>`__,"Make base() const & consistent across iterator wrappers that supports input_iterators",,
-`LWG3541 <https://wg21.link/LWG3541>`__,"indirectly_readable_traits should be SFINAE-friendly for all types",,
-`LWG3543 <https://wg21.link/LWG3543>`__,"Definition of when counted_iterators refer to the same sequence isn't quite right",,
-`LWG3546 <https://wg21.link/LWG3546>`__,"common_iterator's postfix-proxy is not quite right",,
-`LWG3549 <https://wg21.link/LWG3549>`__,"view_interface is overspecified to derive from view_base",,
-`LWG3551 <https://wg21.link/LWG3551>`__,"borrowed_{iterator,subrange}_t are overspecified",,
-`LWG3553 <https://wg21.link/LWG3553>`__,"Useless constraint in split_view::outer-iterator::value_type::begin()",,
-`LWG3555 <https://wg21.link/LWG3555>`__,"{transform,elements}_view::iterator::iterator_concept should consider const-qualification of the underlying range",,
diff --git a/gnu/llvm/libcxx/docs/Status/RangesPaper.csv b/gnu/llvm/libcxx/docs/Status/RangesPaper.csv
deleted file mode 100644
index a7d28970669..00000000000
--- a/gnu/llvm/libcxx/docs/Status/RangesPaper.csv
+++ /dev/null
@@ -1,149 +0,0 @@
-Section,Description,Dependencies,Assignee,Complete
-[tuple.helper],Update <tuple> includes.,None,Unassigned,Not started
-`[range.cmp] <http://wg21.link/range.cmp>`_,"| `ranges::equal_to <https://llvm.org/D100429>`_
-| `ranges::not_equal_to <https://llvm.org/D100429>`_
-| `ranges::less <https://llvm.org/D100429>`_
-| `ranges::greater <https://llvm.org/D100429>`_
-| `ranges::less_equal <https://llvm.org/D100429>`_
-| `ranges::greater_equal <https://llvm.org/D100429>`_",None,Zoe Carver,✅
-`[readable.traits] <http://wg21.link/readable.traits>`_,"| `indirectly_readable_traits <https://llvm.org/D99461>`_
-| `iter_value_t <https://llvm.org/D99863>`_",None,Christopher Di Bella,✅
-`[incrementable.traits] <http://wg21.link/incrementable.traits>`_,"| `incrementable_traits <https://llvm.org/D99141>`_
-| `iter_difference_t <https://llvm.org/D99863>`_",,Christopher Di Bella,✅
-`[iterator.traits] <http://wg21.link/iterator.traits>`_,`Updates to iterator_traits <https://llvm.org/D99855>`_,"| indirectly_readable_traits
-| incrementable_traits",Christopher Di Bella,✅
-`[special.mem.concepts] <http://wg21.link/special.mem.concepts>`_,"| *no-throw-input-iterator*
-| *no-throw-sentinel-for*
-| *no-throw-input-range*
-| *no-throw-forward-iterator*
-| *no-throw-forward-range*","| [iterator.concepts]
-| [range.refinements]",Unassigned,Not started
-`[specialized.algorithms] <http://wg21.link/specialized.algorithms>`_,"| ranges::uninitialized_default_construct
-| ranges::uninitialized_default_construct_n
-| ranges::uninitialized_value_construct
-| ranges::uninitialized_value_construct_n
-| ranges::uninitialized_copy
-| ranges::uninitialized_copy_n
-| ranges::uninitialized_move
-| ranges::uninitialized_move_n
-| ranges::uninitialized_fill
-| ranges::uninitialized_fill_n
-| ranges::construct_at
-| ranges::destroy
-| ranges::destroy_at
-| ranges::destroy_n",[special.mem.concepts],Unassigned,Not started
-[strings],Adds begin/end and updates const_iterator.,[iterator.concepts],Unassigned,Not started
-[views.span],Same as [strings],[iterator.concepts],Unassigned,Not started
-`[iterator.cust.move] <http://wg21.link/iterator.cust.move>`_,`ranges::iter_move <https://llvm.org/D99873>`_,,Zoe Carver,✅
-`[iterator.cust.swap] <http://wg21.link/iterator.cust.swap>`_,`ranges::iter_swap <https://llvm.org/D102809>`_,iter_value_t,Zoe Carver,✅
-`[iterator.concepts] <http://wg21.link/iterator.concepts>`_,"| `indirectly_readable <https://llvm.org/D100073>`_
-| `indirectly_writable <https://llvm.org/D100073>`_
-| `weakly_incrementable <https://llvm.org/D100080>`_
-| `incrementable <https://llvm.org/D100080>`_
-| `input_or_output_iterator <https://llvm.org/D100160>`_
-| `sentinel_for <https://llvm.org/D100160>`_
-| `sized_sentinel_for <https://llvm.org/D101371>`_
-| `input_iterator <https://llvm.org/D100271>`_
-| `output_iterator <https://llvm.org/D106704>`_
-| `forward_iterator <https://llvm.org/D100275>`_
-| `bidirectional_iterator <https://llvm.org/D100278>`_
-| `random_access_iterator <https://llvm.org/D101316>`_
-| `contiguous_iterator <https://llvm.org/D101396>`_",,Various,✅
-`[indirectcallable.indirectinvocable] <http://wg21.link/indirectcallable.indirectinvocable>`_,"| indirectly_unary_invocable
-| `indirectly_regular_unary_invocable <https://llvm.org/D101277>`_
-| `indirectly_unary_predicate <https://llvm.org/D101277>`_
-| `indirectly_binary_predicate <https://llvm.org/D101277>`_
-| `indirectly_equivalence_relation <https://llvm.org/D101277>`_
-| `indirectly_strict_weak_order <https://llvm.org/D101277>`_",[readable.traits],Louis Dionne,✅
-`[projected] <http://wg21.link/projected>`_,`ranges::projected <https://llvm.org/D101277>`_,[iterator.concepts],Louis Dionne,✅
-`[common.alg.req] <http://wg21.link/common.alg.req>`_: pt. 1,"| `indirectly_movable <https://llvm.org/D102639>`_
-| `indirectly_movable_storable <https://llvm.org/D102639>`_
-| indirectly_copyable
-| indirectly_copyable_storable",[iterator.concepts],Zoe Carver,In progress
-[common.alg.req]: pt. 2,indirectly_swappable,"| [iterator.concepts]
-| [iterator.cust.swap]",Zoe Carver,✅
-[common.alg.req]: pt. 3,indirectly_comparable,[projected],Louis Dionne,Not started
-[common.alg.req]: pt. 4,"| permutable
-| mergeable
-| sortable",[iterator.concepts],Unassigned,Not started
-[std.iterator.tags],,[iterator.traits],Unassigned,Not started
-`[range.iter.ops] <http://wg21.link/range.iter.ops>`_,"| `ranges::advance <https://llvm.org/D101922>`_
-| `ranges::distance <https://llvm.org/D102789>`_
-| `ranges::next <https://llvm.org/D102563>`_
-| `ranges::prev <https://llvm.org/D102564>`_",[iterator.concepts],Christopher Di Bella,In progress
-[predef.iterators],Updates to predefined iterators.,"| [iterator.concepts]
-| [iterator.cust.swap]
-| [iterator.cust.move]",Unassigned,Not started
-[move.sentinel],,[predef.iterators],Unassigned,Not started
-[common.iterator],,"| [iterator.concepts]
-| [iterator.cust.swap]
-| [iterator.cust.move]",Zoe Carver,✅
-[default.sentinels],std::default_sentinel_t.,No dependencies,Zoe Carver,✅
-[counted.iterator],,"| [iterator.concepts]
-| [iterator.cust.swap]
-| [iterator.cust.move]
-| [default.sentinels]",Zoe Carver,✅
-[stream.iterators],,[default.sentinels],Unassigned,Not started
-`[range.access] <http://wg21.link/range.access>`_,"| `ranges::begin <https://llvm.org/D100255>`_
-| `ranges::end <https://llvm.org/D100255>`_
-| `range::cbegin <https://llvm.org/D100255>`_
-| `ranges::cend <https://llvm.org/D100255>`_
-| ranges::rbegin
-| ranges::rend
-| ranges::crbegin
-| ranges::crend
-| `ranges::size <https://llvm.org/D101079>`_
-| `ranges::ssize <https://llvm.org/D101189>`_
-| `ranges::empty <https://llvm.org/D101193>`_
-| `ranges::data <https://llvm.org/D101476>`_
-| ranges::cdata",[iterator.concepts],Christopher Di Bella and Zoe Carver,In progress
-`[range.range] <http://wg21.link/range.range>`_,"| `ranges::range <https://llvm.org/D100269>`_
-| `ranges::borrowed_range <https://llvm.org/D102426>`_
-| `ranges::enable_borrowed_range <https://llvm.org/D90999>`_
-| `ranges::iterator_t <https://llvm.org/D100255>`_
-| `ranges::sentinel_t <https://llvm.org/D100269>`_
-| `ranges::range_difference_t <https://llvm.org/D100269>`_
-| `ranges::range_size_t <https://llvm.org/D106708>`_
-| `ranges::range_value_t <https://llvm.org/D100269>`_
-| `ranges::range_reference_t <https://llvm.org/D100269>`_
-| `ranges::range_rvalue_reference_t <https://llvm.org/D100269>`_",[range.access],Christopher Di Bella,✅
-`[range.sized] <http://wg21.link/range.sized>`_,"| `ranges::sized_range <https://llvm.org/D102434>`_
-| `ranges::disable_sized_range <https://llvm.org/D102434>`_","| [range.primitives]
-| [range.range]",Christopher Di Bella,✅
-`[range.view] <http://wg21.link/range.view>`_,"| `ranges::enable_view <https://llvm.org/D101547>`_
-| `ranges::view_base <https://llvm.org/D101547>`_
-| `ranges::view <https://llvm.org/D101547>`_",[range.range],Louis Dionne,✅
-`[range.refinements] <http://wg21.link/range.refinements>`_,"| ranges::output_range
-| `ranges::input_range <https://llvm.org/D100271>`_
-| `ranges::forward_range: `D100275 <https://llvm.org/D100275>`_
-| `ranges::bidirectional_range <https://llvm.org/D100278>`_
-| `ranges::random_access_range <https://llvm.org/D101316>`_
-| ranges::contiguous_range
-| `ranges::common_range <https://llvm.org/D100269>`_",[range.range],Christopher Di Bella,✅
-`[range.refinements]`_,`ranges::viewable_range <https://llvm.org/D105816>`_,[range.range],Louis Dionne,✅
-`[range.utility.helpers] <http://wg21.link/range.utility.helpers>`_,"| *simple-view*
-| *has-arrow*
-| *not-same-as*","| [range.range]
-| [iterator.concept.input]",Zoe Carver,✅
-`[view.interface] <http://wg21.link/view.interface>`_,"`ranges::view_interface <https://llvm.org/D101737>`_","| [ranges.range]
-| [range.view]
-| [range.iterator.op.prev]
-| [range.refinements]",Zoe Carver,✅
-`[range.subrange] <http://wg21.link/range.subrange>`_,`ranges::subrange <https://llvm.org/D102006>`_,[view.interface],Zoe Carver,✅
-`[range.dangling] <http://wg21.link/range.dangling>`_,"| ranges::dangling
-| ranges::borrowed_iterator_t
-| ranges::borrowed_subrange_t","| [range.range]
-| [range.subrange]",Christopher Di Bella,✅
-`[range.all] <http://wg21.link/range.all>`_,`view::all <https://llvm.org/D102028>`_,"[range.subrange], [range.view.ref]",Zoe Carver,✅
-`[range.view.ref] <http://wg21.link/range.view>`_,`ref-view <https://llvm.org/D102020>`_,[view.interface],Zoe Carver,✅
-`[range.filter] <http://wg21.link/range.filter>`_,filter_view,[range.all],Louis Dionne,Not started
-`[range.transform] <http://wg21.link/range.transform>`_,`transform_view <https://llvm.org/D103056>`_,[range.all],Zoe Carver,✅
-`[range.iota] <http://wg21.link/range.iota>`_,iota_view,[range.all],Louis Dionne,Not started
-`[range.take] <http://wg21.link/range.take>`_,take_view,[range.all],Zoe Carver,In Progress
-`[range.join] <http://wg21.link/range.join>`_,join_view,[range.all],Christopher Di Bella,Not started
-`[range.empty] <http://wg21.link/range.empty>`_,`empty_view <https://llvm.org/D103208>`_,[view.interface],Zoe Carver,✅
-`[range.single] <http://wg21.link/range.single>`_,single_view,[view.interface],Zoe Carver,In Progress
-`[range.split] <http://wg21.link/range.split>`_,split_view,[range.all],Unassigned,Not started
-`[range.counted] <http://wg21.link/range.counted>`_,view::counted,[range.subrange],Zoe Carver,Not started
-`[range.common] <http://wg21.link/range.common>`_,common_view,[range.all],Zoe Carver,✅
-`[range.reverse] <http://wg21.link/range.reverse>`_,reverse_view,[range.all],Unassigned,Not started
diff --git a/gnu/llvm/libcxx/include/__algorithm/ranges_find.h b/gnu/llvm/libcxx/include/__algorithm/ranges_find.h
index ca6d2f43829..580c2a14c9e 100644
--- a/gnu/llvm/libcxx/include/__algorithm/ranges_find.h
+++ b/gnu/llvm/libcxx/include/__algorithm/ranges_find.h
@@ -26,7 +26,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_RANGES)
+#if _LIBCPP_STD_VER > 17
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -35,7 +35,7 @@ namespace __find {
 struct __fn {
   template <input_iterator _Ip, sentinel_for<_Ip> _Sp, class _Tp, class _Proj = identity>
     requires indirect_binary_predicate<ranges::equal_to, projected<_Ip, _Proj>, const _Tp*>
-  _LIBCPP_HIDE_FROM_ABI constexpr
+  _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr
   _Ip operator()(_Ip __first, _Sp __last, const _Tp& __value, _Proj __proj = {}) const {
     auto __pred = [&](auto&& __e) { return std::forward<decltype(__e)>(__e) == __value; };
     return ranges::__find_if_impl(std::move(__first), std::move(__last), __pred, __proj);
@@ -43,7 +43,7 @@ struct __fn {
 
   template <input_range _Rp, class _Tp, class _Proj = identity>
     requires indirect_binary_predicate<ranges::equal_to, projected<iterator_t<_Rp>, _Proj>, const _Tp*>
-  _LIBCPP_HIDE_FROM_ABI constexpr
+  _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr
   borrowed_iterator_t<_Rp> operator()(_Rp&& __r, const _Tp& __value, _Proj __proj = {}) const {
     auto __pred = [&](auto&& __e) { return std::forward<decltype(__e)>(__e) == __value; };
     return ranges::__find_if_impl(ranges::begin(__r), ranges::end(__r), __pred, __proj);
@@ -58,6 +58,6 @@ inline namespace __cpo {
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_RANGES)
+#endif // _LIBCPP_STD_VER > 17
 
 #endif // _LIBCPP___ALGORITHM_RANGES_FIND_H
diff --git a/gnu/llvm/libcxx/include/__algorithm/ranges_find_if.h b/gnu/llvm/libcxx/include/__algorithm/ranges_find_if.h
index 65ac122f667..45ce6e460d6 100644
--- a/gnu/llvm/libcxx/include/__algorithm/ranges_find_if.h
+++ b/gnu/llvm/libcxx/include/__algorithm/ranges_find_if.h
@@ -24,7 +24,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_RANGES)
+#if _LIBCPP_STD_VER > 17
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -45,14 +45,14 @@ struct __fn {
 
   template <input_iterator _Ip, sentinel_for<_Ip> _Sp, class _Proj = identity,
             indirect_unary_predicate<projected<_Ip, _Proj>> _Pred>
-  _LIBCPP_HIDE_FROM_ABI constexpr
+  _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr
   _Ip operator()(_Ip __first, _Sp __last, _Pred __pred, _Proj __proj = {}) const {
     return ranges::__find_if_impl(std::move(__first), std::move(__last), __pred, __proj);
   }
 
   template <input_range _Rp, class _Proj = identity,
             indirect_unary_predicate<projected<iterator_t<_Rp>, _Proj>> _Pred>
-  _LIBCPP_HIDE_FROM_ABI constexpr
+  _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr
   borrowed_iterator_t<_Rp> operator()(_Rp&& __r, _Pred __pred, _Proj __proj = {}) const {
     return ranges::__find_if_impl(ranges::begin(__r), ranges::end(__r), __pred, __proj);
   }
@@ -66,6 +66,6 @@ inline namespace __cpo {
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_RANGES)
+#endif // _LIBCPP_STD_VER > 17
 
 #endif // _LIBCPP___ALGORITHM_RANGES_FIND_IF_H
diff --git a/gnu/llvm/libcxx/include/__algorithm/ranges_find_if_not.h b/gnu/llvm/libcxx/include/__algorithm/ranges_find_if_not.h
index 9a1adf71fc5..3dd12132754 100644
--- a/gnu/llvm/libcxx/include/__algorithm/ranges_find_if_not.h
+++ b/gnu/llvm/libcxx/include/__algorithm/ranges_find_if_not.h
@@ -26,7 +26,7 @@
 #  pragma GCC system_header
 #endif
 
-#if _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_RANGES)
+#if _LIBCPP_STD_VER > 17
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
@@ -35,7 +35,7 @@ namespace __find_if_not {
 struct __fn {
   template <input_iterator _Ip, sentinel_for<_Ip> _Sp, class _Proj = identity,
             indirect_unary_predicate<projected<_Ip, _Proj>> _Pred>
-  _LIBCPP_HIDE_FROM_ABI constexpr
+  _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr
   _Ip operator()(_Ip __first, _Sp __last, _Pred __pred, _Proj __proj = {}) const {
     auto __pred2 = [&](auto&& __e) { return !std::invoke(__pred, std::forward<decltype(__e)>(__e)); };
     return ranges::__find_if_impl(std::move(__first), std::move(__last), __pred2, __proj);
@@ -43,7 +43,7 @@ struct __fn {
 
   template <input_range _Rp, class _Proj = identity,
             indirect_unary_predicate<projected<iterator_t<_Rp>, _Proj>> _Pred>
-  _LIBCPP_HIDE_FROM_ABI constexpr
+  _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr
   borrowed_iterator_t<_Rp> operator()(_Rp&& __r, _Pred __pred, _Proj __proj = {}) const {
     auto __pred2 = [&](auto&& __e) { return !std::invoke(__pred, std::forward<decltype(__e)>(__e)); };
     return ranges::__find_if_impl(ranges::begin(__r), ranges::end(__r), __pred2, __proj);
@@ -58,6 +58,6 @@ inline namespace __cpo {
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_RANGES)
+#endif // _LIBCPP_STD_VER > 17
 
 #endif // _LIBCPP___ALGORITHM_RANGES_FIND_IF_NOT_H
diff --git a/gnu/llvm/libcxx/include/__bits b/gnu/llvm/libcxx/include/__bits
deleted file mode 100644
index b565a782358..00000000000
--- a/gnu/llvm/libcxx/include/__bits
+++ /dev/null
@@ -1,145 +0,0 @@
-// -*- C++ -*-
-//===----------------------------------------------------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef _LIBCPP___BITS
-#define _LIBCPP___BITS
-
-#include <__config>
-
-#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
-#endif
-
-_LIBCPP_PUSH_MACROS
-#include <__undef_macros>
-
-
-_LIBCPP_BEGIN_NAMESPACE_STD
-
-#ifndef _LIBCPP_COMPILER_MSVC
-
-inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
-int __libcpp_ctz(unsigned __x)           _NOEXCEPT { return __builtin_ctz(__x); }
-
-inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
-int __libcpp_ctz(unsigned long __x)      _NOEXCEPT { return __builtin_ctzl(__x); }
-
-inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
-int __libcpp_ctz(unsigned long long __x) _NOEXCEPT { return __builtin_ctzll(__x); }
-
-
-inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
-int __libcpp_clz(unsigned __x)           _NOEXCEPT { return __builtin_clz(__x); }
-
-inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
-int __libcpp_clz(unsigned long __x)      _NOEXCEPT { return __builtin_clzl(__x); }
-
-inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
-int __libcpp_clz(unsigned long long __x) _NOEXCEPT { return __builtin_clzll(__x); }
-
-
-inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
-int __libcpp_popcount(unsigned __x)           _NOEXCEPT { return __builtin_popcount(__x); }
-
-inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
-int __libcpp_popcount(unsigned long __x)      _NOEXCEPT { return __builtin_popcountl(__x); }
-
-inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
-int __libcpp_popcount(unsigned long long __x) _NOEXCEPT { return __builtin_popcountll(__x); }
-
-#else  // _LIBCPP_COMPILER_MSVC
-
-// Precondition:  __x != 0
-inline _LIBCPP_INLINE_VISIBILITY
-int __libcpp_ctz(unsigned __x) {
-  static_assert(sizeof(unsigned) == sizeof(unsigned long), "");
-  static_assert(sizeof(unsigned long) == 4, "");
-  unsigned long __where;
-  if (_BitScanForward(&__where, __x))
-    return static_cast<int>(__where);
-  return 32;
-}
-
-inline _LIBCPP_INLINE_VISIBILITY
-int __libcpp_ctz(unsigned long __x) {
-    static_assert(sizeof(unsigned long) == sizeof(unsigned), "");
-    return __ctz(static_cast<unsigned>(__x));
-}
-
-inline _LIBCPP_INLINE_VISIBILITY
-int __libcpp_ctz(unsigned long long __x) {
-    unsigned long __where;
-#if defined(_LIBCPP_HAS_BITSCAN64)
-  if (_BitScanForward64(&__where, __x))
-    return static_cast<int>(__where);
-#else
-  // Win32 doesn't have _BitScanForward64 so emulate it with two 32 bit calls.
-  if (_BitScanForward(&__where, static_cast<unsigned long>(__x)))
-    return static_cast<int>(__where);
-  if (_BitScanForward(&__where, static_cast<unsigned long>(__x >> 32)))
-    return static_cast<int>(__where + 32);
-#endif
-  return 64;
-}
-
-// Precondition:  __x != 0
-inline _LIBCPP_INLINE_VISIBILITY
-int __libcpp_clz(unsigned __x) {
-  static_assert(sizeof(unsigned) == sizeof(unsigned long), "");
-  static_assert(sizeof(unsigned long) == 4, "");
-  unsigned long __where;
-  if (_BitScanReverse(&__where, __x))
-    return static_cast<int>(31 - __where);
-  return 32; // Undefined Behavior.
-}
-
-inline _LIBCPP_INLINE_VISIBILITY
-int __libcpp_clz(unsigned long __x) {
-    static_assert(sizeof(unsigned) == sizeof(unsigned long), "");
-    return __libcpp_clz(static_cast<unsigned>(__x));
-}
-
-inline _LIBCPP_INLINE_VISIBILITY
-int __libcpp_clz(unsigned long long __x) {
-  unsigned long __where;
-#if defined(_LIBCPP_HAS_BITSCAN64)
-  if (_BitScanReverse64(&__where, __x))
-    return static_cast<int>(63 - __where);
-#else
-  // Win32 doesn't have _BitScanReverse64 so emulate it with two 32 bit calls.
-  if (_BitScanReverse(&__where, static_cast<unsigned long>(__x >> 32)))
-    return static_cast<int>(63 - (__where + 32));
-  if (_BitScanReverse(&__where, static_cast<unsigned long>(__x)))
-    return static_cast<int>(63 - __where);
-#endif
-  return 64; // Undefined Behavior.
-}
-
-inline _LIBCPP_INLINE_VISIBILITY int __libcpp_popcount(unsigned __x) {
-  static_assert(sizeof(unsigned) == 4, "");
-  return __popcnt(__x);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY int __libcpp_popcount(unsigned long __x) {
-  static_assert(sizeof(unsigned long) == 4, "");
-  return __popcnt(__x);
-}
-
-inline _LIBCPP_INLINE_VISIBILITY int __libcpp_popcount(unsigned long long __x) {
-  static_assert(sizeof(unsigned long long) == 8, "");
-  return __popcnt64(__x);
-}
-
-#endif // _LIBCPP_COMPILER_MSVC
-
-_LIBCPP_END_NAMESPACE_STD
-
-_LIBCPP_POP_MACROS
-
-#endif // _LIBCPP___BITS
diff --git a/gnu/llvm/libcxx/include/__config b/gnu/llvm/libcxx/include/__config
index 97e33f3157a..10815388389 100644
--- a/gnu/llvm/libcxx/include/__config
+++ b/gnu/llvm/libcxx/include/__config
@@ -1,5 +1,5 @@
 // -*- C++ -*-
-//===--------------------------- __config ---------------------------------===//
+//===----------------------------------------------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
@@ -7,8 +7,8 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef _LIBCPP_CONFIG
-#define _LIBCPP_CONFIG
+#ifndef _LIBCPP___CONFIG
+#define _LIBCPP___CONFIG
 
 #include <__config_site>
 
@@ -19,1175 +19,958 @@
 #endif
 
 #ifndef _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER
-#pragma GCC system_header
+#  pragma GCC system_header
+#endif
+
+#if defined(__apple_build_version__)
+// Given AppleClang XX.Y.Z, _LIBCPP_APPLE_CLANG_VER is XXYZ (e.g. AppleClang 14.0.3 => 1403)
+#  define _LIBCPP_COMPILER_CLANG_BASED
+#  define _LIBCPP_APPLE_CLANG_VER (__apple_build_version__ / 10000)
+#elif defined(__clang__)
+#  define _LIBCPP_COMPILER_CLANG_BASED
+#  define _LIBCPP_CLANG_VER (__clang_major__ * 100 + __clang_minor__)
+#elif defined(__GNUC__)
+#  define _LIBCPP_COMPILER_GCC
 #endif
 
 #ifdef __cplusplus
 
-#ifdef __GNUC__
-#  define _GNUC_VER (__GNUC__ * 100 + __GNUC_MINOR__)
-// The _GNUC_VER_NEW macro better represents the new GCC versioning scheme
-// introduced in GCC 5.0.
-#  define _GNUC_VER_NEW (_GNUC_VER * 10 + __GNUC_PATCHLEVEL__)
-#else
-#  define _GNUC_VER 0
-#  define _GNUC_VER_NEW 0
-#endif
+// _LIBCPP_VERSION represents the version of libc++, which matches the version of LLVM.
+// Given a LLVM release LLVM XX.YY.ZZ (e.g. LLVM 16.0.1 == 16.00.01), _LIBCPP_VERSION is
+// defined to XXYYZZ.
+#  define _LIBCPP_VERSION 160006
 
-#define _LIBCPP_VERSION 13000
+#  define _LIBCPP_CONCAT_IMPL(_X, _Y) _X##_Y
+#  define _LIBCPP_CONCAT(_X, _Y) _LIBCPP_CONCAT_IMPL(_X, _Y)
 
-#ifndef _LIBCPP_ABI_VERSION
-#  define _LIBCPP_ABI_VERSION 1
-#endif
+// Valid C++ identifier that revs with every libc++ version. This can be used to
+// generate identifiers that must be unique for every released libc++ version.
+#  define _LIBCPP_VERSIONED_IDENTIFIER _LIBCPP_CONCAT(v, _LIBCPP_VERSION)
 
-#if __STDC_HOSTED__ == 0
-#  define _LIBCPP_FREESTANDING
-#endif
+#  if __STDC_HOSTED__ == 0
+#    define _LIBCPP_FREESTANDING
+#  endif
 
-#ifndef _LIBCPP_STD_VER
-#  if  __cplusplus <= 201103L
-#    define _LIBCPP_STD_VER 11
-#  elif __cplusplus <= 201402L
-#    define _LIBCPP_STD_VER 14
-#  elif __cplusplus <= 201703L
-#    define _LIBCPP_STD_VER 17
-#  elif __cplusplus <= 202002L
-#    define _LIBCPP_STD_VER 20
+#  ifndef _LIBCPP_STD_VER
+#    if __cplusplus <= 201103L
+#      define _LIBCPP_STD_VER 11
+#    elif __cplusplus <= 201402L
+#      define _LIBCPP_STD_VER 14
+#    elif __cplusplus <= 201703L
+#      define _LIBCPP_STD_VER 17
+#    elif __cplusplus <= 202002L
+#      define _LIBCPP_STD_VER 20
+#    else
+// Expected release year of the next C++ standard
+#      define _LIBCPP_STD_VER 23
+#    endif
+#  endif // _LIBCPP_STD_VER
+
+#  if defined(__ELF__)
+#    define _LIBCPP_OBJECT_FORMAT_ELF 1
+#  elif defined(__MACH__)
+#    define _LIBCPP_OBJECT_FORMAT_MACHO 1
+#  elif defined(_WIN32)
+#    define _LIBCPP_OBJECT_FORMAT_COFF 1
+#  elif defined(__wasm__)
+#    define _LIBCPP_OBJECT_FORMAT_WASM 1
+#  elif defined(_AIX)
+#    define _LIBCPP_OBJECT_FORMAT_XCOFF 1
 #  else
-#    define _LIBCPP_STD_VER 21  // current year, or date of c++2b ratification
-#  endif
-#endif // _LIBCPP_STD_VER
-
-#if defined(__ELF__)
-#  define _LIBCPP_OBJECT_FORMAT_ELF   1
-#elif defined(__MACH__)
-#  define _LIBCPP_OBJECT_FORMAT_MACHO 1
-#elif defined(_WIN32)
-#  define _LIBCPP_OBJECT_FORMAT_COFF  1
-#elif defined(__wasm__)
-#  define _LIBCPP_OBJECT_FORMAT_WASM  1
-#else
-   // ... add new file formats here ...
-#endif
+// ... add new file formats here ...
+#  endif
 
-#if defined(_LIBCPP_ABI_UNSTABLE) || _LIBCPP_ABI_VERSION >= 2
+#  if _LIBCPP_ABI_VERSION >= 2
 // Change short string representation so that string data starts at offset 0,
 // improving its alignment in some cases.
-#  define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT
+#    define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT
 // Fix deque iterator type in order to support incomplete types.
-#  define _LIBCPP_ABI_INCOMPLETE_TYPES_IN_DEQUE
+#    define _LIBCPP_ABI_INCOMPLETE_TYPES_IN_DEQUE
 // Fix undefined behavior in how std::list stores its linked nodes.
-#  define _LIBCPP_ABI_LIST_REMOVE_NODE_POINTER_UB
+#    define _LIBCPP_ABI_LIST_REMOVE_NODE_POINTER_UB
 // Fix undefined behavior in  how __tree stores its end and parent nodes.
-#  define _LIBCPP_ABI_TREE_REMOVE_NODE_POINTER_UB
+#    define _LIBCPP_ABI_TREE_REMOVE_NODE_POINTER_UB
 // Fix undefined behavior in how __hash_table stores its pointer types.
-#  define _LIBCPP_ABI_FIX_UNORDERED_NODE_POINTER_UB
-#  define _LIBCPP_ABI_FORWARD_LIST_REMOVE_NODE_POINTER_UB
-#  define _LIBCPP_ABI_FIX_UNORDERED_CONTAINER_SIZE_TYPE
-// Don't use a nullptr_t simulation type in C++03 instead using C++11 nullptr
-// provided under the alternate keyword __nullptr, which changes the mangling
-// of nullptr_t. This option is ABI incompatible with GCC in C++03 mode.
-#  define _LIBCPP_ABI_ALWAYS_USE_CXX11_NULLPTR
+#    define _LIBCPP_ABI_FIX_UNORDERED_NODE_POINTER_UB
+#    define _LIBCPP_ABI_FORWARD_LIST_REMOVE_NODE_POINTER_UB
+#    define _LIBCPP_ABI_FIX_UNORDERED_CONTAINER_SIZE_TYPE
 // Define a key function for `bad_function_call` in the library, to centralize
 // its vtable and typeinfo to libc++ rather than having all other libraries
 // using that class define their own copies.
-#  define _LIBCPP_ABI_BAD_FUNCTION_CALL_KEY_FUNCTION
+#    define _LIBCPP_ABI_BAD_FUNCTION_CALL_KEY_FUNCTION
+// Override the default return value of exception::what() for
+// bad_function_call::what() with a string that is specific to
+// bad_function_call (see http://wg21.link/LWG2233). This is an ABI break
+// because it changes the vtable layout of bad_function_call.
+#    define _LIBCPP_ABI_BAD_FUNCTION_CALL_GOOD_WHAT_MESSAGE
 // Enable optimized version of __do_get_(un)signed which avoids redundant copies.
-#  define _LIBCPP_ABI_OPTIMIZED_LOCALE_NUM_GET
-// In C++20 and later, don't derive std::plus from std::binary_function,
-// nor std::negate from std::unary_function.
-#  define _LIBCPP_ABI_NO_BINDER_BASES
+#    define _LIBCPP_ABI_OPTIMIZED_LOCALE_NUM_GET
 // Give reverse_iterator<T> one data member of type T, not two.
 // Also, in C++17 and later, don't derive iterator types from std::iterator.
-#  define _LIBCPP_ABI_NO_ITERATOR_BASES
+#    define _LIBCPP_ABI_NO_ITERATOR_BASES
 // Use the smallest possible integer type to represent the index of the variant.
 // Previously libc++ used "unsigned int" exclusively.
-#  define _LIBCPP_ABI_VARIANT_INDEX_TYPE_OPTIMIZATION
+#    define _LIBCPP_ABI_VARIANT_INDEX_TYPE_OPTIMIZATION
 // Unstable attempt to provide a more optimized std::function
-#  define _LIBCPP_ABI_OPTIMIZED_FUNCTION
+#    define _LIBCPP_ABI_OPTIMIZED_FUNCTION
 // All the regex constants must be distinct and nonzero.
-#  define _LIBCPP_ABI_REGEX_CONSTANTS_NONZERO
-// Use raw pointers, not wrapped ones, for std::span's iterator type.
-#  define _LIBCPP_ABI_SPAN_POINTER_ITERATORS
+#    define _LIBCPP_ABI_REGEX_CONSTANTS_NONZERO
 // Re-worked external template instantiations for std::string with a focus on
 // performance and fast-path inlining.
-#  define _LIBCPP_ABI_STRING_OPTIMIZED_EXTERNAL_INSTANTIATION
+#    define _LIBCPP_ABI_STRING_OPTIMIZED_EXTERNAL_INSTANTIATION
 // Enable clang::trivial_abi on std::unique_ptr.
-#  define _LIBCPP_ABI_ENABLE_UNIQUE_PTR_TRIVIAL_ABI
+#    define _LIBCPP_ABI_ENABLE_UNIQUE_PTR_TRIVIAL_ABI
 // Enable clang::trivial_abi on std::shared_ptr and std::weak_ptr
-#  define _LIBCPP_ABI_ENABLE_SHARED_PTR_TRIVIAL_ABI
-#elif _LIBCPP_ABI_VERSION == 1
-#  if !defined(_LIBCPP_OBJECT_FORMAT_COFF)
+#    define _LIBCPP_ABI_ENABLE_SHARED_PTR_TRIVIAL_ABI
+// std::random_device holds some state when it uses an implementation that gets
+// entropy from a file (see _LIBCPP_USING_DEV_RANDOM). When switching from this
+// implementation to another one on a platform that has already shipped
+// std::random_device, one needs to retain the same object layout to remain ABI
+// compatible. This switch removes these workarounds for platforms that don't care
+// about ABI compatibility.
+#    define _LIBCPP_ABI_NO_RANDOM_DEVICE_COMPATIBILITY_LAYOUT
+// Don't export the legacy __basic_string_common class and its methods from the built library.
+#    define _LIBCPP_ABI_DO_NOT_EXPORT_BASIC_STRING_COMMON
+// Don't export the legacy __vector_base_common class and its methods from the built library.
+#    define _LIBCPP_ABI_DO_NOT_EXPORT_VECTOR_BASE_COMMON
+// According to the Standard, `bitset::operator[] const` returns bool
+#    define _LIBCPP_ABI_BITSET_VECTOR_BOOL_CONST_SUBSCRIPT_RETURN_BOOL
+// Fix the implementation of CityHash used for std::hash<fundamental-type>.
+// This is an ABI break because `std::hash` will return a different result,
+// which means that hashing the same object in translation units built against
+// different versions of libc++ can return inconsistent results. This is especially
+// tricky since std::hash is used in the implementation of unordered containers.
+//
+// The incorrect implementation of CityHash has the problem that it drops some
+// bits on the floor.
+#    define _LIBCPP_ABI_FIX_CITYHASH_IMPLEMENTATION
+// Remove the base 10 implementation of std::to_chars from the dylib.
+// The implementation moved to the header, but we still export the symbols from
+// the dylib for backwards compatibility.
+#    define _LIBCPP_ABI_DO_NOT_EXPORT_TO_CHARS_BASE_10
+#  elif _LIBCPP_ABI_VERSION == 1
+#    if !(defined(_LIBCPP_OBJECT_FORMAT_COFF) || defined(_LIBCPP_OBJECT_FORMAT_XCOFF))
 // Enable compiling copies of now inline methods into the dylib to support
 // applications compiled against older libraries. This is unnecessary with
 // COFF dllexport semantics, since dllexport forces a non-inline definition
 // of inline functions to be emitted anyway. Our own non-inline copy would
-// conflict with the dllexport-emitted copy, so we disable it.
-#    define _LIBCPP_DEPRECATED_ABI_LEGACY_LIBRARY_DEFINITIONS_FOR_INLINE_FUNCTIONS
-#  endif
+// conflict with the dllexport-emitted copy, so we disable it. For XCOFF,
+// the linker will take issue with the symbols in the shared object if the
+// weak inline methods get visibility (such as from -fvisibility-inlines-hidden),
+// so disable it.
+#      define _LIBCPP_DEPRECATED_ABI_LEGACY_LIBRARY_DEFINITIONS_FOR_INLINE_FUNCTIONS
+#    endif
 // Feature macros for disabling pre ABI v1 features. All of these options
 // are deprecated.
-#  if defined(__FreeBSD__)
-#    define _LIBCPP_DEPRECATED_ABI_DISABLE_PAIR_TRIVIAL_COPY_CTOR
+#    if defined(__FreeBSD__)
+#      define _LIBCPP_DEPRECATED_ABI_DISABLE_PAIR_TRIVIAL_COPY_CTOR
+#    endif
 #  endif
-#endif
 
-#if defined(_LIBCPP_BUILDING_LIBRARY) || defined(_LIBCPP_ABI_UNSTABLE) || _LIBCPP_ABI_VERSION >= 2
+#  if defined(_LIBCPP_BUILDING_LIBRARY) || _LIBCPP_ABI_VERSION >= 2
 // Enable additional explicit instantiations of iostreams components. This
 // reduces the number of weak definitions generated in programs that use
 // iostreams by providing a single strong definition in the shared library.
-# define _LIBCPP_ABI_ENABLE_ADDITIONAL_IOSTREAM_EXPLICIT_INSTANTIATIONS_1
-#endif
+#    define _LIBCPP_ABI_ENABLE_ADDITIONAL_IOSTREAM_EXPLICIT_INSTANTIATIONS_1
 
-#define _LIBCPP_CONCAT1(_LIBCPP_X,_LIBCPP_Y) _LIBCPP_X##_LIBCPP_Y
-#define _LIBCPP_CONCAT(_LIBCPP_X,_LIBCPP_Y) _LIBCPP_CONCAT1(_LIBCPP_X,_LIBCPP_Y)
+// Define a key function for `bad_function_call` in the library, to centralize
+// its vtable and typeinfo to libc++ rather than having all other libraries
+// using that class define their own copies.
+#    define _LIBCPP_ABI_BAD_FUNCTION_CALL_KEY_FUNCTION
+#  endif
 
-#ifndef _LIBCPP_ABI_NAMESPACE
-# define _LIBCPP_ABI_NAMESPACE _LIBCPP_CONCAT(__,_LIBCPP_ABI_VERSION)
-#endif
+#  define _LIBCPP_TOSTRING2(x) #x
+#  define _LIBCPP_TOSTRING(x) _LIBCPP_TOSTRING2(x)
 
-#if __cplusplus < 201103L
-#define _LIBCPP_CXX03_LANG
-#endif
+#  if __cplusplus < 201103L
+#    define _LIBCPP_CXX03_LANG
+#  endif
 
-#ifndef __has_attribute
-#define __has_attribute(__x) 0
-#endif
+#  ifndef __has_attribute
+#    define __has_attribute(__x) 0
+#  endif
 
-#ifndef __has_builtin
-#define __has_builtin(__x) 0
-#endif
+#  ifndef __has_builtin
+#    define __has_builtin(__x) 0
+#  endif
 
-#ifndef __has_extension
-#define __has_extension(__x) 0
-#endif
+#  ifndef __has_extension
+#    define __has_extension(__x) 0
+#  endif
 
-#ifndef __has_feature
-#define __has_feature(__x) 0
-#endif
+#  ifndef __has_feature
+#    define __has_feature(__x) 0
+#  endif
 
-#ifndef __has_cpp_attribute
-#define __has_cpp_attribute(__x) 0
-#endif
+#  ifndef __has_cpp_attribute
+#    define __has_cpp_attribute(__x) 0
+#  endif
+
+#  ifndef __has_constexpr_builtin
+#    define __has_constexpr_builtin(x) 0
+#  endif
 
 // '__is_identifier' returns '0' if '__x' is a reserved identifier provided by
 // the compiler and '1' otherwise.
-#ifndef __is_identifier
-#define __is_identifier(__x) 1
-#endif
-
-#ifndef __has_declspec_attribute
-#define __has_declspec_attribute(__x) 0
-#endif
+#  ifndef __is_identifier
+#    define __is_identifier(__x) 1
+#  endif
 
-#define __has_keyword(__x) !(__is_identifier(__x))
+#  ifndef __has_declspec_attribute
+#    define __has_declspec_attribute(__x) 0
+#  endif
 
-#ifndef __has_include
-#define __has_include(...) 0
-#endif
+#  define __has_keyword(__x) !(__is_identifier(__x))
 
-#if defined(__apple_build_version__)
-#  define _LIBCPP_COMPILER_CLANG_BASED
-#  define _LIBCPP_APPLE_CLANG_VER (__apple_build_version__ / 10000)
-#elif defined(__clang__)
-#  define _LIBCPP_COMPILER_CLANG_BASED
-#  define _LIBCPP_CLANG_VER (__clang_major__ * 100 + __clang_minor__)
-#elif defined(__GNUC__)
-#  define _LIBCPP_COMPILER_GCC
-#elif defined(_MSC_VER)
-#  define _LIBCPP_COMPILER_MSVC
-#elif defined(__IBMCPP__)
-#  define _LIBCPP_COMPILER_IBM
-#endif
+#  ifndef __has_include
+#    define __has_include(...) 0
+#  endif
 
-#if defined(_LIBCPP_COMPILER_GCC) && __cplusplus < 201103L
-#error "libc++ does not support using GCC with C++03. Please enable C++11"
-#endif
+#  if !defined(_LIBCPP_COMPILER_CLANG_BASED) && __cplusplus < 201103L
+#    error "libc++ only supports C++03 with Clang-based compilers. Please enable C++11"
+#  endif
 
 // FIXME: ABI detection should be done via compiler builtin macros. This
 // is just a placeholder until Clang implements such macros. For now assume
 // that Windows compilers pretending to be MSVC++ target the Microsoft ABI,
 // and allow the user to explicitly specify the ABI to handle cases where this
 // heuristic falls short.
-#if defined(_LIBCPP_ABI_FORCE_ITANIUM) && defined(_LIBCPP_ABI_FORCE_MICROSOFT)
-#  error "Only one of _LIBCPP_ABI_FORCE_ITANIUM and _LIBCPP_ABI_FORCE_MICROSOFT can be defined"
-#elif defined(_LIBCPP_ABI_FORCE_ITANIUM)
-#  define _LIBCPP_ABI_ITANIUM
-#elif defined(_LIBCPP_ABI_FORCE_MICROSOFT)
-#  define _LIBCPP_ABI_MICROSOFT
-#else
-#  if defined(_WIN32) && defined(_MSC_VER)
+#  if defined(_LIBCPP_ABI_FORCE_ITANIUM) && defined(_LIBCPP_ABI_FORCE_MICROSOFT)
+#    error "Only one of _LIBCPP_ABI_FORCE_ITANIUM and _LIBCPP_ABI_FORCE_MICROSOFT can be defined"
+#  elif defined(_LIBCPP_ABI_FORCE_ITANIUM)
+#    define _LIBCPP_ABI_ITANIUM
+#  elif defined(_LIBCPP_ABI_FORCE_MICROSOFT)
 #    define _LIBCPP_ABI_MICROSOFT
 #  else
-#    define _LIBCPP_ABI_ITANIUM
+#    if defined(_WIN32) && defined(_MSC_VER)
+#      define _LIBCPP_ABI_MICROSOFT
+#    else
+#      define _LIBCPP_ABI_ITANIUM
+#    endif
 #  endif
-#endif
 
-#if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_NO_VCRUNTIME)
-# define _LIBCPP_ABI_VCRUNTIME
-#endif
+#  if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_NO_VCRUNTIME)
+#    define _LIBCPP_ABI_VCRUNTIME
+#  endif
 
-// Need to detect which libc we're using if we're on Linux.
-#if defined(__linux__)
-#  include <features.h>
-#  if defined(__GLIBC_PREREQ)
-#    define _LIBCPP_GLIBC_PREREQ(a, b) __GLIBC_PREREQ(a, b)
-#  else
-#    define _LIBCPP_GLIBC_PREREQ(a, b) 0
-#  endif // defined(__GLIBC_PREREQ)
-#endif // defined(__linux__)
+#  if __has_feature(experimental_library)
+#    ifndef _LIBCPP_ENABLE_EXPERIMENTAL
+#      define _LIBCPP_ENABLE_EXPERIMENTAL
+#    endif
+#  endif
 
-#ifdef __LITTLE_ENDIAN__
-#  if __LITTLE_ENDIAN__
-#    define _LIBCPP_LITTLE_ENDIAN
-#  endif  // __LITTLE_ENDIAN__
-#endif // __LITTLE_ENDIAN__
+// Incomplete features get their own specific disabling flags. This makes it
+// easier to grep for target specific flags once the feature is complete.
+#  if !defined(_LIBCPP_ENABLE_EXPERIMENTAL) && !defined(_LIBCPP_BUILDING_LIBRARY)
+#    define _LIBCPP_HAS_NO_INCOMPLETE_FORMAT
+#  endif
 
-#ifdef __BIG_ENDIAN__
-#  if __BIG_ENDIAN__
-#    define _LIBCPP_BIG_ENDIAN
-#  endif  // __BIG_ENDIAN__
-#endif // __BIG_ENDIAN__
+// Need to detect which libc we're using if we're on Linux.
+#  if defined(__linux__)
+#    include <features.h>
+#    if defined(__GLIBC_PREREQ)
+#      define _LIBCPP_GLIBC_PREREQ(a, b) __GLIBC_PREREQ(a, b)
+#    else
+#      define _LIBCPP_GLIBC_PREREQ(a, b) 0
+#    endif // defined(__GLIBC_PREREQ)
+#  endif   // defined(__linux__)
 
-#ifdef __BYTE_ORDER__
-#  if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
-#    define _LIBCPP_LITTLE_ENDIAN
-#  elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
-#    define _LIBCPP_BIG_ENDIAN
-#  endif // __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
-#endif // __BYTE_ORDER__
-
-#ifdef __FreeBSD__
-#  include <sys/endian.h>
-#  include <osreldate.h>
-#  if _BYTE_ORDER == _LITTLE_ENDIAN
-#    define _LIBCPP_LITTLE_ENDIAN
-#  else  // _BYTE_ORDER == _LITTLE_ENDIAN
-#    define _LIBCPP_BIG_ENDIAN
-#  endif  // _BYTE_ORDER == _LITTLE_ENDIAN
-#  ifndef __LONG_LONG_SUPPORTED
-#    define _LIBCPP_HAS_NO_LONG_LONG
-#  endif  // __LONG_LONG_SUPPORTED
-#endif // __FreeBSD__
-
-#if defined(__NetBSD__) || defined(__OpenBSD__)
-#  include <sys/endian.h>
-#  if _BYTE_ORDER == _LITTLE_ENDIAN
+#  if defined(__MVS__)
+#    include <features.h> // for __NATIVE_ASCII_F
+#  endif
+
+#  ifdef __LITTLE_ENDIAN__
+#    if __LITTLE_ENDIAN__
+#      define _LIBCPP_LITTLE_ENDIAN
+#    endif // __LITTLE_ENDIAN__
+#  endif   // __LITTLE_ENDIAN__
+
+#  ifdef __BIG_ENDIAN__
+#    if __BIG_ENDIAN__
+#      define _LIBCPP_BIG_ENDIAN
+#    endif // __BIG_ENDIAN__
+#  endif   // __BIG_ENDIAN__
+
+#  ifdef __BYTE_ORDER__
+#    if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
+#      define _LIBCPP_LITTLE_ENDIAN
+#    elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
+#      define _LIBCPP_BIG_ENDIAN
+#    endif // __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
+#  endif   // __BYTE_ORDER__
+
+#  ifdef __FreeBSD__
+#    include <sys/endian.h>
+#    include <osreldate.h>
+#    if _BYTE_ORDER == _LITTLE_ENDIAN
+#      define _LIBCPP_LITTLE_ENDIAN
+#    else // _BYTE_ORDER == _LITTLE_ENDIAN
+#      define _LIBCPP_BIG_ENDIAN
+#    endif // _BYTE_ORDER == _LITTLE_ENDIAN
+#  endif   // __FreeBSD__
+
+#  if defined(__NetBSD__) || defined(__OpenBSD__)
+#    include <sys/endian.h>
+#    if _BYTE_ORDER == _LITTLE_ENDIAN
+#      define _LIBCPP_LITTLE_ENDIAN
+#    else // _BYTE_ORDER == _LITTLE_ENDIAN
+#      define _LIBCPP_BIG_ENDIAN
+#    endif // _BYTE_ORDER == _LITTLE_ENDIAN
+#  endif   // defined(__NetBSD__) || defined(__OpenBSD__)
+
+#  if defined(_WIN32)
+#    define _LIBCPP_WIN32API
 #    define _LIBCPP_LITTLE_ENDIAN
-#  else  // _BYTE_ORDER == _LITTLE_ENDIAN
-#    define _LIBCPP_BIG_ENDIAN
-#  endif  // _BYTE_ORDER == _LITTLE_ENDIAN
-#endif // defined(__NetBSD__) || defined(__OpenBSD__)
-
-#if defined(_WIN32)
-#  define _LIBCPP_WIN32API
-#  define _LIBCPP_LITTLE_ENDIAN
-#  define _LIBCPP_SHORT_WCHAR   1
+#    define _LIBCPP_SHORT_WCHAR 1
 // Both MinGW and native MSVC provide a "MSVC"-like environment
-#  define _LIBCPP_MSVCRT_LIKE
+#    define _LIBCPP_MSVCRT_LIKE
 // If mingw not explicitly detected, assume using MS C runtime only if
 // a MS compatibility version is specified.
-#  if defined(_MSC_VER) && !defined(__MINGW32__)
-#    define _LIBCPP_MSVCRT // Using Microsoft's C Runtime library
-#  endif
-#  if (defined(_M_AMD64) || defined(__x86_64__)) || (defined(_M_ARM) || defined(__arm__))
-#    define _LIBCPP_HAS_BITSCAN64
-#  endif
-#  define _LIBCPP_HAS_OPEN_WITH_WCHAR
-#  if defined(_LIBCPP_MSVCRT)
-#    define _LIBCPP_HAS_QUICK_EXIT
-#  endif
+#    if defined(_MSC_VER) && !defined(__MINGW32__)
+#      define _LIBCPP_MSVCRT // Using Microsoft's C Runtime library
+#    endif
+#    if (defined(_M_AMD64) || defined(__x86_64__)) || (defined(_M_ARM) || defined(__arm__))
+#      define _LIBCPP_HAS_BITSCAN64
+#    endif
+#    define _LIBCPP_HAS_OPEN_WITH_WCHAR
+#  endif // defined(_WIN32)
 
-// Some CRT APIs are unavailable to store apps
-#  if defined(WINAPI_FAMILY)
-#    include <winapifamily.h>
-#    if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP) &&                  \
-        (!defined(WINAPI_PARTITION_SYSTEM) ||                                  \
-         !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_SYSTEM))
-#      define _LIBCPP_WINDOWS_STORE_APP
+#  ifdef __sun__
+#    include <sys/isa_defs.h>
+#    ifdef _LITTLE_ENDIAN
+#      define _LIBCPP_LITTLE_ENDIAN
+#    else
+#      define _LIBCPP_BIG_ENDIAN
 #    endif
+#  endif // __sun__
+
+#  if defined(_AIX) && !defined(__64BIT__)
+// The size of wchar is 2 byte on 32-bit mode on AIX.
+#    define _LIBCPP_SHORT_WCHAR 1
 #  endif
-#endif // defined(_WIN32)
 
-#ifdef __sun__
-#  include <sys/isa_defs.h>
-#  ifdef _LITTLE_ENDIAN
-#    define _LIBCPP_LITTLE_ENDIAN
+// Libc++ supports various implementations of std::random_device.
+//
+// _LIBCPP_USING_DEV_RANDOM
+//      Read entropy from the given file, by default `/dev/urandom`.
+//      If a token is provided, it is assumed to be the path to a file
+//      to read entropy from. This is the default behavior if nothing
+//      else is specified. This implementation requires storing state
+//      inside `std::random_device`.
+//
+// _LIBCPP_USING_ARC4_RANDOM
+//      Use arc4random(). This allows obtaining random data even when
+//      using sandboxing mechanisms. On some platforms like Apple, this
+//      is the recommended source of entropy for user-space programs.
+//      When this option is used, the token passed to `std::random_device`'s
+//      constructor *must* be "/dev/urandom" -- anything else is an error.
+//
+// _LIBCPP_USING_GETENTROPY
+//      Use getentropy().
+//      When this option is used, the token passed to `std::random_device`'s
+//      constructor *must* be "/dev/urandom" -- anything else is an error.
+//
+// _LIBCPP_USING_FUCHSIA_CPRNG
+//      Use Fuchsia's zx_cprng_draw() system call, which is specified to
+//      deliver high-quality entropy and cannot fail.
+//      When this option is used, the token passed to `std::random_device`'s
+//      constructor *must* be "/dev/urandom" -- anything else is an error.
+//
+// _LIBCPP_USING_NACL_RANDOM
+//      NaCl's sandbox (which PNaCl also runs in) doesn't allow filesystem access,
+//      including accesses to the special files under `/dev`. This implementation
+//      uses the NaCL syscall `nacl_secure_random_init()` to get entropy.
+//      When this option is used, the token passed to `std::random_device`'s
+//      constructor *must* be "/dev/urandom" -- anything else is an error.
+//
+// _LIBCPP_USING_WIN32_RANDOM
+//      Use rand_s(), for use on Windows.
+//      When this option is used, the token passed to `std::random_device`'s
+//      constructor *must* be "/dev/urandom" -- anything else is an error.
+#  if defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) ||                     \
+      defined(__DragonFly__) || defined(__sun__)
+#    define _LIBCPP_USING_ARC4_RANDOM
+#  elif defined(__wasi__) || defined(__EMSCRIPTEN__)
+#    define _LIBCPP_USING_GETENTROPY
+#  elif defined(__Fuchsia__)
+#    define _LIBCPP_USING_FUCHSIA_CPRNG
+#  elif defined(__native_client__)
+#    define _LIBCPP_USING_NACL_RANDOM
+#  elif defined(_LIBCPP_WIN32API)
+#    define _LIBCPP_USING_WIN32_RANDOM
 #  else
-#    define _LIBCPP_BIG_ENDIAN
-#  endif
-#endif // __sun__
-
-#if defined(__OpenBSD__) || defined(__CloudABI__)
-   // Certain architectures provide arc4random(). Prefer using
-   // arc4random() over /dev/{u,}random to make it possible to obtain
-   // random data even when using sandboxing mechanisms such as chroots,
-   // Capsicum, etc.
-#  define _LIBCPP_USING_ARC4_RANDOM
-#elif defined(__Fuchsia__) || defined(__wasi__)
-#  define _LIBCPP_USING_GETENTROPY
-#elif defined(__native_client__)
-   // NaCl's sandbox (which PNaCl also runs in) doesn't allow filesystem access,
-   // including accesses to the special files under /dev. C++11's
-   // std::random_device is instead exposed through a NaCl syscall.
-#  define _LIBCPP_USING_NACL_RANDOM
-#elif defined(_LIBCPP_WIN32API)
-#  define _LIBCPP_USING_WIN32_RANDOM
-#else
-#  define _LIBCPP_USING_DEV_RANDOM
-#endif
-
-#if !defined(_LIBCPP_LITTLE_ENDIAN) && !defined(_LIBCPP_BIG_ENDIAN)
-#  include <endian.h>
-#  if __BYTE_ORDER == __LITTLE_ENDIAN
-#    define _LIBCPP_LITTLE_ENDIAN
-#  elif __BYTE_ORDER == __BIG_ENDIAN
-#    define _LIBCPP_BIG_ENDIAN
-#  else  // __BYTE_ORDER == __BIG_ENDIAN
-#    error unable to determine endian
+#    define _LIBCPP_USING_DEV_RANDOM
 #  endif
-#endif // !defined(_LIBCPP_LITTLE_ENDIAN) && !defined(_LIBCPP_BIG_ENDIAN)
-
-#if __has_attribute(__no_sanitize__) && !defined(_LIBCPP_COMPILER_GCC)
-#  define _LIBCPP_NO_CFI __attribute__((__no_sanitize__("cfi")))
-#else
-#  define _LIBCPP_NO_CFI
-#endif
 
-// If the compiler supports using_if_exists, pretend we have those functions and they'll
-// be picked up if the C library provides them.
-//
-// TODO: Once we drop support for Clang 12, we can assume the compiler supports using_if_exists
-//       for platforms that don't have a conforming C11 library, so we can drop this whole thing.
-#if __has_attribute(using_if_exists)
-# define _LIBCPP_HAS_TIMESPEC_GET
-# define _LIBCPP_HAS_QUICK_EXIT
-# define _LIBCPP_HAS_ALIGNED_ALLOC
-#else
-#if (defined(__ISO_C_VISIBLE) && (__ISO_C_VISIBLE >= 2011)) || __cplusplus >= 201103L
-#  if defined(__FreeBSD__)
-#    define _LIBCPP_HAS_ALIGNED_ALLOC
-#    define _LIBCPP_HAS_QUICK_EXIT
-#    if __FreeBSD_version >= 1300064 || \
-       (__FreeBSD_version >= 1201504 && __FreeBSD_version < 1300000)
-#      define _LIBCPP_HAS_TIMESPEC_GET
-#    endif
-#  elif defined(__BIONIC__)
-#    if __ANDROID_API__ >= 21
-#      define _LIBCPP_HAS_QUICK_EXIT
-#    endif
-#    if __ANDROID_API__ >= 28
-#      define _LIBCPP_HAS_ALIGNED_ALLOC
+#  if !defined(_LIBCPP_LITTLE_ENDIAN) && !defined(_LIBCPP_BIG_ENDIAN)
+#    include <endian.h>
+#    if __BYTE_ORDER == __LITTLE_ENDIAN
+#      define _LIBCPP_LITTLE_ENDIAN
+#    elif __BYTE_ORDER == __BIG_ENDIAN
+#      define _LIBCPP_BIG_ENDIAN
+#    else // __BYTE_ORDER == __BIG_ENDIAN
+#      error unable to determine endian
 #    endif
-#    if __ANDROID_API__ >= 29
-#      define _LIBCPP_HAS_TIMESPEC_GET
-#    endif
-#  elif defined(__Fuchsia__) || defined(__wasi__) || defined(__NetBSD__)
-#    define _LIBCPP_HAS_ALIGNED_ALLOC
-#    define _LIBCPP_HAS_QUICK_EXIT
-#    define _LIBCPP_HAS_TIMESPEC_GET
-#  elif defined(__OpenBSD__)
-#    define _LIBCPP_HAS_ALIGNED_ALLOC
-#    define _LIBCPP_HAS_TIMESPEC_GET
-#  elif defined(__linux__)
-#    if !defined(_LIBCPP_HAS_MUSL_LIBC)
-#      if _LIBCPP_GLIBC_PREREQ(2, 15) || defined(__BIONIC__)
-#        define _LIBCPP_HAS_QUICK_EXIT
-#      endif
-#      if _LIBCPP_GLIBC_PREREQ(2, 17)
-#        define _LIBCPP_HAS_ALIGNED_ALLOC
-#        define _LIBCPP_HAS_TIMESPEC_GET
-#      endif
-#    else // defined(_LIBCPP_HAS_MUSL_LIBC)
-#      define _LIBCPP_HAS_ALIGNED_ALLOC
-#      define _LIBCPP_HAS_QUICK_EXIT
-#      define _LIBCPP_HAS_TIMESPEC_GET
-#    endif
-#  elif defined(_LIBCPP_MSVCRT)
-     // Using Microsoft's C Runtime library, not MinGW
-#    define _LIBCPP_HAS_TIMESPEC_GET
-#  elif defined(__APPLE__)
-     // timespec_get and aligned_alloc were introduced in macOS 10.15 and
-     // aligned releases
-#    if ((defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >= 101500) || \
-         (defined(__ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__ >= 130000) || \
-         (defined(__ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__ >= 130000) || \
-         (defined(__ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__ >= 60000))
-#      define _LIBCPP_HAS_ALIGNED_ALLOC
-#      define _LIBCPP_HAS_TIMESPEC_GET
-#    endif
-#  endif // __APPLE__
-#endif
-#endif // __has_attribute(using_if_exists)
+#  endif // !defined(_LIBCPP_LITTLE_ENDIAN) && !defined(_LIBCPP_BIG_ENDIAN)
 
-#ifndef _LIBCPP_CXX03_LANG
-# define _LIBCPP_ALIGNOF(_Tp) alignof(_Tp)
-#elif defined(_LIBCPP_COMPILER_CLANG_BASED)
-# define _LIBCPP_ALIGNOF(_Tp) _Alignof(_Tp)
-#else
-# error "We don't know a correct way to implement alignof(T) in C++03 outside of Clang"
-#endif
+#  if __has_attribute(__no_sanitize__) && !defined(_LIBCPP_COMPILER_GCC)
+#    define _LIBCPP_NO_CFI __attribute__((__no_sanitize__("cfi")))
+#  else
+#    define _LIBCPP_NO_CFI
+#  endif
 
-#define _LIBCPP_PREFERRED_ALIGNOF(_Tp) __alignof(_Tp)
+#  ifndef _LIBCPP_CXX03_LANG
 
-#if defined(_LIBCPP_COMPILER_CLANG_BASED)
+#    define _LIBCPP_ALIGNOF(_Tp) alignof(_Tp)
+#    define _ALIGNAS_TYPE(x) alignas(x)
+#    define _ALIGNAS(x) alignas(x)
+#    define _LIBCPP_NORETURN [[noreturn]]
+#    define _NOEXCEPT noexcept
+#    define _NOEXCEPT_(x) noexcept(x)
+#    define _LIBCPP_CONSTEXPR constexpr
 
-#if defined(_LIBCPP_ALTERNATE_STRING_LAYOUT)
-#  error _LIBCPP_ALTERNATE_STRING_LAYOUT is deprecated, please use _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT instead
-#endif
-#if defined(__APPLE__) && !defined(__i386__) && !defined(__x86_64__) &&       \
-    (!defined(__arm__) || __ARM_ARCH_7K__ >= 2)
-#  define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT
-#endif
+#  else
 
-#if __has_feature(cxx_alignas)
-#  define _ALIGNAS_TYPE(x) alignas(x)
-#  define _ALIGNAS(x) alignas(x)
-#else
-#  define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x))))
-#  define _ALIGNAS(x) __attribute__((__aligned__(x)))
-#endif
+#    define _LIBCPP_ALIGNOF(_Tp) _Alignof(_Tp)
+#    define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x))))
+#    define _ALIGNAS(x) __attribute__((__aligned__(x)))
+#    define _LIBCPP_NORETURN __attribute__((__noreturn__))
+#    define _LIBCPP_HAS_NO_NOEXCEPT
+#    define nullptr __nullptr
+#    define _NOEXCEPT throw()
+#    define _NOEXCEPT_(x)
+#    define static_assert(...) _Static_assert(__VA_ARGS__)
+#    define decltype(...) __decltype(__VA_ARGS__)
+#    define _LIBCPP_CONSTEXPR
 
-#if __cplusplus < 201103L
 typedef __char16_t char16_t;
 typedef __char32_t char32_t;
-#endif
 
-#if !__has_feature(cxx_exceptions)
-#  define _LIBCPP_NO_EXCEPTIONS
-#endif
-
-#if !(__has_feature(cxx_strong_enums))
-#define _LIBCPP_HAS_NO_STRONG_ENUMS
-#endif
-
-#if __has_feature(cxx_attributes)
-#  define _LIBCPP_NORETURN [[noreturn]]
-#else
-#  define _LIBCPP_NORETURN __attribute__ ((noreturn))
-#endif
+#  endif
 
-#if !(__has_feature(cxx_nullptr))
-#  if (__has_extension(cxx_nullptr) || __has_keyword(__nullptr)) && defined(_LIBCPP_ABI_ALWAYS_USE_CXX11_NULLPTR)
-#    define nullptr __nullptr
-#  else
-#    define _LIBCPP_HAS_NO_NULLPTR
+#  if !defined(__cpp_exceptions) || __cpp_exceptions < 199711L
+#    define _LIBCPP_NO_EXCEPTIONS
 #  endif
-#endif
 
-// Objective-C++ features (opt-in)
-#if __has_feature(objc_arc)
-#define _LIBCPP_HAS_OBJC_ARC
-#endif
+#  define _LIBCPP_PREFERRED_ALIGNOF(_Tp) __alignof(_Tp)
 
-#if __has_feature(objc_arc_weak)
-#define _LIBCPP_HAS_OBJC_ARC_WEAK
-#endif
+#  if defined(_LIBCPP_COMPILER_CLANG_BASED)
 
-#if __has_extension(blocks)
-#  define _LIBCPP_HAS_EXTENSION_BLOCKS
-#endif
+#    if defined(__APPLE__) && !defined(__i386__) && !defined(__x86_64__) && (!defined(__arm__) || __ARM_ARCH_7K__ >= 2)
+#      define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT
+#    endif
 
-#if defined(_LIBCPP_HAS_EXTENSION_BLOCKS) && defined(__APPLE__)
-#  define _LIBCPP_HAS_BLOCKS_RUNTIME
-#endif
+// Objective-C++ features (opt-in)
+#    if __has_feature(objc_arc)
+#      define _LIBCPP_HAS_OBJC_ARC
+#    endif
 
-#if !(__has_feature(cxx_relaxed_constexpr))
-#define _LIBCPP_HAS_NO_CXX14_CONSTEXPR
-#endif
+#    if __has_feature(objc_arc_weak)
+#      define _LIBCPP_HAS_OBJC_ARC_WEAK
+#    endif
 
-#if !(__has_feature(cxx_variable_templates))
-#define _LIBCPP_HAS_NO_VARIABLE_TEMPLATES
-#endif
+#    if __has_extension(blocks)
+#      define _LIBCPP_HAS_EXTENSION_BLOCKS
+#    endif
 
-#if !(__has_feature(cxx_noexcept))
-#define _LIBCPP_HAS_NO_NOEXCEPT
-#endif
+#    if defined(_LIBCPP_HAS_EXTENSION_BLOCKS) && defined(__APPLE__)
+#      define _LIBCPP_HAS_BLOCKS_RUNTIME
+#    endif
 
-#if !__has_feature(address_sanitizer)
-#define _LIBCPP_HAS_NO_ASAN
-#endif
+#    if !__has_feature(address_sanitizer)
+#      define _LIBCPP_HAS_NO_ASAN
+#    endif
 
 // Allow for build-time disabling of unsigned integer sanitization
-#if __has_attribute(no_sanitize)
-#define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK __attribute__((__no_sanitize__("unsigned-integer-overflow")))
-#endif
+#    if __has_attribute(no_sanitize)
+#      define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK __attribute__((__no_sanitize__("unsigned-integer-overflow")))
+#    endif
 
-#if __has_builtin(__builtin_launder)
-#define _LIBCPP_COMPILER_HAS_BUILTIN_LAUNDER
-#endif
+#    define _LIBCPP_ALWAYS_INLINE __attribute__((__always_inline__))
 
-#if __has_builtin(__builtin_constant_p)
-#define _LIBCPP_COMPILER_HAS_BUILTIN_CONSTANT_P
-#endif
+#    define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__
 
-#if !__is_identifier(__has_unique_object_representations)
-#define _LIBCPP_HAS_UNIQUE_OBJECT_REPRESENTATIONS
-#endif
-
-#define _LIBCPP_ALWAYS_INLINE __attribute__ ((__always_inline__))
+#  elif defined(_LIBCPP_COMPILER_GCC)
 
-// Literal operators ""d and ""y are supported starting with LLVM Clang 8 and AppleClang 10.0.1
-#if (defined(_LIBCPP_CLANG_VER) && _LIBCPP_CLANG_VER < 800) ||                 \
-    (defined(_LIBCPP_APPLE_CLANG_VER) && _LIBCPP_APPLE_CLANG_VER < 1001)
-#define _LIBCPP_HAS_NO_CXX20_CHRONO_LITERALS
-#endif
+#    if !defined(__SANITIZE_ADDRESS__)
+#      define _LIBCPP_HAS_NO_ASAN
+#    endif
 
-#define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__
+#    define _LIBCPP_ALWAYS_INLINE __attribute__((__always_inline__))
 
-#elif defined(_LIBCPP_COMPILER_GCC)
+#    define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__
 
-#define _ALIGNAS(x) __attribute__((__aligned__(x)))
-#define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x))))
+#  endif // _LIBCPP_COMPILER_[CLANG|GCC]
 
-#define _LIBCPP_NORETURN __attribute__((noreturn))
+#  if defined(_LIBCPP_OBJECT_FORMAT_COFF)
 
-#if !defined(__EXCEPTIONS)
-#  define _LIBCPP_NO_EXCEPTIONS
-#endif
+#    ifdef _DLL
+#      define _LIBCPP_CRT_FUNC __declspec(dllimport)
+#    else
+#      define _LIBCPP_CRT_FUNC
+#    endif
 
-// Determine if GCC supports relaxed constexpr
-#if !defined(__cpp_constexpr) || __cpp_constexpr < 201304L
-#define _LIBCPP_HAS_NO_CXX14_CONSTEXPR
-#endif
+#    if defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) || (defined(__MINGW32__) && !defined(_LIBCPP_BUILDING_LIBRARY))
+#      define _LIBCPP_DLL_VIS
+#      define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS
+#      define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS
+#      define _LIBCPP_OVERRIDABLE_FUNC_VIS
+#      define _LIBCPP_EXPORTED_FROM_ABI
+#    elif defined(_LIBCPP_BUILDING_LIBRARY)
+#      define _LIBCPP_DLL_VIS __declspec(dllexport)
+#      if defined(__MINGW32__)
+#        define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_DLL_VIS
+#        define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS
+#      else
+#        define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS
+#        define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS _LIBCPP_DLL_VIS
+#      endif
+#      define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_DLL_VIS
+#      define _LIBCPP_EXPORTED_FROM_ABI __declspec(dllexport)
+#    else
+#      define _LIBCPP_DLL_VIS __declspec(dllimport)
+#      define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_DLL_VIS
+#      define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS
+#      define _LIBCPP_OVERRIDABLE_FUNC_VIS
+#      define _LIBCPP_EXPORTED_FROM_ABI __declspec(dllimport)
+#    endif
 
-// GCC 5 supports variable templates
-#if !defined(__cpp_variable_templates) || __cpp_variable_templates < 201304L
-#define _LIBCPP_HAS_NO_VARIABLE_TEMPLATES
-#endif
+#    define _LIBCPP_TYPE_VIS _LIBCPP_DLL_VIS
+#    define _LIBCPP_FUNC_VIS _LIBCPP_DLL_VIS
+#    define _LIBCPP_EXCEPTION_ABI _LIBCPP_DLL_VIS
+#    define _LIBCPP_HIDDEN
+#    define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS
+#    define _LIBCPP_TEMPLATE_VIS
+#    define _LIBCPP_TEMPLATE_DATA_VIS
+#    define _LIBCPP_ENUM_VIS
 
-#if !defined(__SANITIZE_ADDRESS__)
-#define _LIBCPP_HAS_NO_ASAN
-#endif
+#  else
 
-#if _GNUC_VER >= 700
-#define _LIBCPP_COMPILER_HAS_BUILTIN_LAUNDER
-#define _LIBCPP_COMPILER_HAS_BUILTIN_CONSTANT_P
-#define _LIBCPP_HAS_UNIQUE_OBJECT_REPRESENTATIONS
-#endif
+#    if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
+#      define _LIBCPP_VISIBILITY(vis) __attribute__((__visibility__(vis)))
+#    else
+#      define _LIBCPP_VISIBILITY(vis)
+#    endif
 
-#define _LIBCPP_ALWAYS_INLINE __attribute__ ((__always_inline__))
+#    define _LIBCPP_HIDDEN _LIBCPP_VISIBILITY("hidden")
+#    define _LIBCPP_FUNC_VIS _LIBCPP_VISIBILITY("default")
+#    define _LIBCPP_TYPE_VIS _LIBCPP_VISIBILITY("default")
+#    define _LIBCPP_TEMPLATE_DATA_VIS _LIBCPP_VISIBILITY("default")
+#    define _LIBCPP_EXPORTED_FROM_ABI _LIBCPP_VISIBILITY("default")
+#    define _LIBCPP_EXCEPTION_ABI _LIBCPP_VISIBILITY("default")
+#    define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_VISIBILITY("default")
+#    define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS
 
-#define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__
+// TODO: Make this a proper customization point or remove the option to override it.
+#    ifndef _LIBCPP_OVERRIDABLE_FUNC_VIS
+#      define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_VISIBILITY("default")
+#    endif
 
-#elif defined(_LIBCPP_COMPILER_MSVC)
+#    if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
+// The inline should be removed once PR32114 is resolved
+#      define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS inline _LIBCPP_HIDDEN
+#    else
+#      define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS
+#    endif
 
-#define _LIBCPP_TOSTRING2(x) #x
-#define _LIBCPP_TOSTRING(x) _LIBCPP_TOSTRING2(x)
-#define _LIBCPP_WARNING(x) __pragma(message(__FILE__ "(" _LIBCPP_TOSTRING(__LINE__) ") : warning note: " x))
+#    if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
+#      if __has_attribute(__type_visibility__)
+#        define _LIBCPP_TEMPLATE_VIS __attribute__((__type_visibility__("default")))
+#      else
+#        define _LIBCPP_TEMPLATE_VIS __attribute__((__visibility__("default")))
+#      endif
+#    else
+#      define _LIBCPP_TEMPLATE_VIS
+#    endif
 
-#if _MSC_VER < 1900
-#error "MSVC versions prior to Visual Studio 2015 are not supported"
-#endif
+#    if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) && __has_attribute(__type_visibility__)
+#      define _LIBCPP_ENUM_VIS __attribute__((__type_visibility__("default")))
+#    else
+#      define _LIBCPP_ENUM_VIS
+#    endif
 
-#define _LIBCPP_HAS_NO_CXX14_CONSTEXPR
-#define _LIBCPP_HAS_NO_VARIABLE_TEMPLATES
-#define __alignof__ __alignof
-#define _LIBCPP_NORETURN __declspec(noreturn)
-#define _ALIGNAS(x) __declspec(align(x))
-#define _ALIGNAS_TYPE(x) alignas(x)
+#  endif // defined(_LIBCPP_OBJECT_FORMAT_COFF)
 
-#define _LIBCPP_WEAK
+#  if __has_attribute(exclude_from_explicit_instantiation)
+#    define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION __attribute__((__exclude_from_explicit_instantiation__))
+#  else
+// Try to approximate the effect of exclude_from_explicit_instantiation
+// (which is that entities are not assumed to be provided by explicit
+// template instantiations in the dylib) by always inlining those entities.
+#    define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION _LIBCPP_ALWAYS_INLINE
+#  endif
 
-#define _LIBCPP_HAS_NO_ASAN
+// This macro marks a symbol as being hidden from libc++'s ABI. This is achieved
+// on two levels:
+// 1. The symbol is given hidden visibility, which ensures that users won't start exporting
+//    symbols from their dynamic library by means of using the libc++ headers. This ensures
+//    that those symbols stay private to the dynamic library in which it is defined.
+//
+// 2. The symbol is given an ABI tag that changes with each version of libc++. This ensures
+//    that no ODR violation can arise from mixing two TUs compiled with different versions
+//    of libc++ where we would have changed the definition of a symbol. If the symbols shared
+//    the same name, the ODR would require that their definitions be token-by-token equivalent,
+//    which basically prevents us from being able to make any change to any function in our
+//    headers. Using this ABI tag ensures that the symbol name is "bumped" artificially at
+//    each release, which lets us change the definition of these symbols at our leisure.
+//    Note that historically, this has been achieved in various ways, including force-inlining
+//    all functions or giving internal linkage to all functions. Both these (previous) solutions
+//    suffer from drawbacks that lead notably to code bloat.
+//
+// Note that we use _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION to ensure that we don't depend
+// on _LIBCPP_HIDE_FROM_ABI methods of classes explicitly instantiated in the dynamic library.
+//
+// Also note that the _LIBCPP_HIDE_FROM_ABI_VIRTUAL macro should be used on virtual functions
+// instead of _LIBCPP_HIDE_FROM_ABI. That macro does not use an ABI tag. Indeed, the mangled
+// name of a virtual function is part of its ABI, since some architectures like arm64e can sign
+// the virtual function pointer in the vtable based on the mangled name of the function. Since
+// we use an ABI tag that changes with each released version, the mangled name of the virtual
+// function would change, which is incorrect. Note that it doesn't make much sense to change
+// the implementation of a virtual function in an ABI-incompatible way in the first place,
+// since that would be an ABI break anyway. Hence, the lack of ABI tag should not be noticeable.
+//
+// TODO: We provide a escape hatch with _LIBCPP_NO_ABI_TAG for folks who want to avoid increasing
+//       the length of symbols with an ABI tag. In practice, we should remove the escape hatch and
+//       use compression mangling instead, see https://github.com/itanium-cxx-abi/cxx-abi/issues/70.
+#  ifndef _LIBCPP_NO_ABI_TAG
+#    define _LIBCPP_HIDE_FROM_ABI                                                                                      \
+      _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION                                                       \
+          __attribute__((__abi_tag__(_LIBCPP_TOSTRING(_LIBCPP_VERSIONED_IDENTIFIER))))
+#  else
+#    define _LIBCPP_HIDE_FROM_ABI _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
+#  endif
+#  define _LIBCPP_HIDE_FROM_ABI_VIRTUAL _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
 
-#define _LIBCPP_ALWAYS_INLINE __forceinline
+// This macro provides a HIDE_FROM_ABI equivalent that can be applied to extern
+// "C" function, as those lack mangling.
+#  define _LIBCPP_HIDE_FROM_ABI_C _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
 
-#define _LIBCPP_HAS_NO_VECTOR_EXTENSION
+#  ifdef _LIBCPP_BUILDING_LIBRARY
+#    if _LIBCPP_ABI_VERSION > 1
+#      define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI
+#    else
+#      define _LIBCPP_HIDE_FROM_ABI_AFTER_V1
+#    endif
+#  else
+#    define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI
+#  endif
 
-#define _LIBCPP_DISABLE_EXTENSION_WARNING
+// Just so we can migrate to the new macros gradually.
+#  define _LIBCPP_INLINE_VISIBILITY _LIBCPP_HIDE_FROM_ABI
 
-#elif defined(_LIBCPP_COMPILER_IBM)
+// Inline namespaces are available in Clang/GCC/MSVC regardless of C++ dialect.
+// clang-format off
+#  define _LIBCPP_BEGIN_NAMESPACE_STD namespace std { inline namespace _LIBCPP_ABI_NAMESPACE {
+#  define _LIBCPP_END_NAMESPACE_STD }}
+#  define _VSTD std
 
-#define _ALIGNAS(x) __attribute__((__aligned__(x)))
-#define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x))))
-#define _ATTRIBUTE(x) __attribute__((x))
-#define _LIBCPP_NORETURN __attribute__((noreturn))
+_LIBCPP_BEGIN_NAMESPACE_STD _LIBCPP_END_NAMESPACE_STD
 
-#define _LIBCPP_HAS_NO_UNICODE_CHARS
-#define _LIBCPP_HAS_NO_VARIABLE_TEMPLATES
+#  if _LIBCPP_STD_VER > 14
+#    define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM                                                                         \
+       _LIBCPP_BEGIN_NAMESPACE_STD inline namespace __fs { namespace filesystem {
+#  else
+#    define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM                                                                         \
+      _LIBCPP_BEGIN_NAMESPACE_STD namespace __fs { namespace filesystem {
+#  endif
 
-#if defined(_AIX)
-#define __MULTILOCALE_API
-#endif
+#  define _LIBCPP_END_NAMESPACE_FILESYSTEM _LIBCPP_END_NAMESPACE_STD }}
+// clang-format on
 
-#define _LIBCPP_HAS_NO_ASAN
+#  define _VSTD_FS std::__fs::filesystem
 
-#define _LIBCPP_ALWAYS_INLINE __attribute__ ((__always_inline__))
+#  if __has_attribute(__enable_if__)
+#    define _LIBCPP_PREFERRED_OVERLOAD __attribute__((__enable_if__(true, "")))
+#  endif
 
-#define _LIBCPP_HAS_NO_VECTOR_EXTENSION
+#  ifndef __SIZEOF_INT128__
+#    define _LIBCPP_HAS_NO_INT128
+#  endif
 
-#define _LIBCPP_DISABLE_EXTENSION_WARNING
+#  ifndef __cpp_consteval
+#    define _LIBCPP_CONSTEVAL _LIBCPP_CONSTEXPR
+#  else
+#    define _LIBCPP_CONSTEVAL consteval
+#  endif
 
-#endif // _LIBCPP_COMPILER_[CLANG|GCC|MSVC|IBM]
+#  if __has_attribute(__malloc__)
+#    define _LIBCPP_NOALIAS __attribute__((__malloc__))
+#  else
+#    define _LIBCPP_NOALIAS
+#  endif
 
-#if defined(_LIBCPP_OBJECT_FORMAT_COFF)
+#  if __has_attribute(__using_if_exists__)
+#    define _LIBCPP_USING_IF_EXISTS __attribute__((__using_if_exists__))
+#  else
+#    define _LIBCPP_USING_IF_EXISTS
+#  endif
 
-#ifdef _DLL
-#  define _LIBCPP_CRT_FUNC __declspec(dllimport)
-#else
-#  define _LIBCPP_CRT_FUNC
-#endif
+#  ifdef _LIBCPP_CXX03_LANG
+#    define _LIBCPP_DECLARE_STRONG_ENUM(x)                                                                             \
+      struct _LIBCPP_TYPE_VIS x {                                                                                      \
+        enum __lx
+// clang-format off
+#    define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x)                                                                      \
+      __lx __v_;                                                                                                       \
+      _LIBCPP_INLINE_VISIBILITY x(__lx __v) : __v_(__v) {}                                                             \
+      _LIBCPP_INLINE_VISIBILITY explicit x(int __v) : __v_(static_cast<__lx>(__v)) {}                                  \
+      _LIBCPP_INLINE_VISIBILITY operator int() const { return __v_; }                                                  \
+      };
+// clang-format on
+
+#  else // _LIBCPP_CXX03_LANG
+#    define _LIBCPP_DECLARE_STRONG_ENUM(x) enum class _LIBCPP_ENUM_VIS x
+#    define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x)
+#  endif // _LIBCPP_CXX03_LANG
+
+#  if defined(__APPLE__) || defined(__FreeBSD__) || defined(_LIBCPP_MSVCRT_LIKE) || defined(__sun__) ||                \
+      defined(__NetBSD__)
+#    define _LIBCPP_LOCALE__L_EXTENSIONS 1
+#  endif
 
-#if defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
-#  define _LIBCPP_DLL_VIS
-#  define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS
-#  define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS
-#  define _LIBCPP_OVERRIDABLE_FUNC_VIS
-#  define _LIBCPP_EXPORTED_FROM_ABI
-#elif defined(_LIBCPP_BUILDING_LIBRARY)
-#  define _LIBCPP_DLL_VIS __declspec(dllexport)
-#  if defined(__MINGW32__)
-#    define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_DLL_VIS
-#    define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS
-#  else
-#    define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS
-#    define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS _LIBCPP_DLL_VIS
+#  ifdef __FreeBSD__
+#    define _DECLARE_C99_LDBL_MATH 1
 #  endif
-#  define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_DLL_VIS
-#  define _LIBCPP_EXPORTED_FROM_ABI __declspec(dllexport)
-#else
-#  define _LIBCPP_DLL_VIS __declspec(dllimport)
-#  define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_DLL_VIS
-#  define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS
-#  define _LIBCPP_OVERRIDABLE_FUNC_VIS
-#  define _LIBCPP_EXPORTED_FROM_ABI __declspec(dllimport)
-#endif
 
-#define _LIBCPP_TYPE_VIS            _LIBCPP_DLL_VIS
-#define _LIBCPP_FUNC_VIS            _LIBCPP_DLL_VIS
-#define _LIBCPP_EXCEPTION_ABI       _LIBCPP_DLL_VIS
-#define _LIBCPP_HIDDEN
-#define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS
-#define _LIBCPP_TEMPLATE_VIS
-#define _LIBCPP_TEMPLATE_DATA_VIS
-#define _LIBCPP_ENUM_VIS
+// If we are getting operator new from the MSVC CRT, then allocation overloads
+// for align_val_t were added in 19.12, aka VS 2017 version 15.3.
+#  if defined(_LIBCPP_MSVCRT) && defined(_MSC_VER) && _MSC_VER < 1912
+#    define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION
+#  elif defined(_LIBCPP_ABI_VCRUNTIME) && !defined(__cpp_aligned_new)
+// We're deferring to Microsoft's STL to provide aligned new et al. We don't
+// have it unless the language feature test macro is defined.
+#    define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION
+#  elif defined(__MVS__)
+#    define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION
+#  endif
 
-#endif // defined(_LIBCPP_OBJECT_FORMAT_COFF)
+#  if defined(_LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION) || (!defined(__cpp_aligned_new) || __cpp_aligned_new < 201606)
+#    define _LIBCPP_HAS_NO_ALIGNED_ALLOCATION
+#  endif
 
-#ifndef _LIBCPP_HIDDEN
-#  if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
-#    define _LIBCPP_HIDDEN __attribute__ ((__visibility__("hidden")))
-#  else
-#    define _LIBCPP_HIDDEN
+// It is not yet possible to use aligned_alloc() on all Apple platforms since
+// 10.15 was the first version to ship an implementation of aligned_alloc().
+#  if defined(__APPLE__)
+#    if (defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) &&                                                     \
+         __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 101500)
+#      define _LIBCPP_HAS_NO_C11_ALIGNED_ALLOC
+#    endif
+#  elif defined(__ANDROID__) && __ANDROID_API__ < 28
+// Android only provides aligned_alloc when targeting API 28 or higher.
+#    define _LIBCPP_HAS_NO_C11_ALIGNED_ALLOC
 #  endif
-#endif
 
-#ifndef _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS
-#  if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
-// The inline should be removed once PR32114 is resolved
-#    define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS inline _LIBCPP_HIDDEN
-#  else
-#    define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS
+#  if defined(__APPLE__) || defined(__FreeBSD__)
+#    define _LIBCPP_HAS_DEFAULTRUNELOCALE
 #  endif
-#endif
 
-#ifndef _LIBCPP_FUNC_VIS
-#  if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
-#    define _LIBCPP_FUNC_VIS __attribute__ ((__visibility__("default")))
-#  else
-#    define _LIBCPP_FUNC_VIS
+#  if defined(__APPLE__) || defined(__FreeBSD__) || defined(__sun__)
+#    define _LIBCPP_WCTYPE_IS_MASK
 #  endif
-#endif
 
-#ifndef _LIBCPP_TYPE_VIS
-#  if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
-#    define _LIBCPP_TYPE_VIS __attribute__ ((__visibility__("default")))
-#  else
-#    define _LIBCPP_TYPE_VIS
+#  if _LIBCPP_STD_VER <= 17 || !defined(__cpp_char8_t)
+#    define _LIBCPP_HAS_NO_CHAR8_T
 #  endif
-#endif
 
-#ifndef _LIBCPP_TEMPLATE_VIS
-#  if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
-#    if __has_attribute(__type_visibility__)
-#      define _LIBCPP_TEMPLATE_VIS __attribute__ ((__type_visibility__("default")))
+// Deprecation macros.
+//
+// Deprecations warnings are always enabled, except when users explicitly opt-out
+// by defining _LIBCPP_DISABLE_DEPRECATION_WARNINGS.
+#  if !defined(_LIBCPP_DISABLE_DEPRECATION_WARNINGS)
+#    if __has_attribute(deprecated)
+#      define _LIBCPP_DEPRECATED __attribute__((deprecated))
+#      define _LIBCPP_DEPRECATED_(m) __attribute__((deprecated(m)))
+#    elif _LIBCPP_STD_VER > 11
+#      define _LIBCPP_DEPRECATED [[deprecated]]
+#      define _LIBCPP_DEPRECATED_(m) [[deprecated(m)]]
 #    else
-#      define _LIBCPP_TEMPLATE_VIS __attribute__ ((__visibility__("default")))
+#      define _LIBCPP_DEPRECATED
+#      define _LIBCPP_DEPRECATED_(m)
 #    endif
 #  else
-#    define _LIBCPP_TEMPLATE_VIS
-#  endif
-#endif
-
-#ifndef _LIBCPP_TEMPLATE_DATA_VIS
-#  if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
-#    define _LIBCPP_TEMPLATE_DATA_VIS __attribute__ ((__visibility__("default")))
-#  else
-#    define _LIBCPP_TEMPLATE_DATA_VIS
+#    define _LIBCPP_DEPRECATED
+#    define _LIBCPP_DEPRECATED_(m)
 #  endif
-#endif
 
-#ifndef _LIBCPP_EXPORTED_FROM_ABI
-#  if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
-#    define _LIBCPP_EXPORTED_FROM_ABI __attribute__((__visibility__("default")))
+#  if !defined(_LIBCPP_CXX03_LANG)
+#    define _LIBCPP_DEPRECATED_IN_CXX11 _LIBCPP_DEPRECATED
 #  else
-#    define _LIBCPP_EXPORTED_FROM_ABI
+#    define _LIBCPP_DEPRECATED_IN_CXX11
 #  endif
-#endif
-
-#ifndef _LIBCPP_OVERRIDABLE_FUNC_VIS
-#define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_FUNC_VIS
-#endif
 
-#ifndef _LIBCPP_EXCEPTION_ABI
-#  if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
-#    define _LIBCPP_EXCEPTION_ABI __attribute__ ((__visibility__("default")))
+#  if _LIBCPP_STD_VER > 11
+#    define _LIBCPP_DEPRECATED_IN_CXX14 _LIBCPP_DEPRECATED
 #  else
-#    define _LIBCPP_EXCEPTION_ABI
+#    define _LIBCPP_DEPRECATED_IN_CXX14
 #  endif
-#endif
 
-#ifndef _LIBCPP_ENUM_VIS
-#  if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) && __has_attribute(__type_visibility__)
-#    define _LIBCPP_ENUM_VIS __attribute__ ((__type_visibility__("default")))
+#  if _LIBCPP_STD_VER > 14
+#    define _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_DEPRECATED
 #  else
-#    define _LIBCPP_ENUM_VIS
+#    define _LIBCPP_DEPRECATED_IN_CXX17
 #  endif
-#endif
 
-#ifndef _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS
-#  if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
-#    define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS __attribute__ ((__visibility__("default")))
+#  if _LIBCPP_STD_VER > 17
+#    define _LIBCPP_DEPRECATED_IN_CXX20 _LIBCPP_DEPRECATED
 #  else
-#    define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS
+#    define _LIBCPP_DEPRECATED_IN_CXX20
 #  endif
-#endif
 
-#ifndef _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS
-#define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS
-#endif
-
-#if __has_attribute(internal_linkage)
-#  define _LIBCPP_INTERNAL_LINKAGE __attribute__ ((internal_linkage))
-#else
-#  define _LIBCPP_INTERNAL_LINKAGE _LIBCPP_ALWAYS_INLINE
-#endif
-
-#if __has_attribute(exclude_from_explicit_instantiation)
-#  define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION __attribute__ ((__exclude_from_explicit_instantiation__))
+#if _LIBCPP_STD_VER >= 23
+#  define _LIBCPP_DEPRECATED_IN_CXX23 _LIBCPP_DEPRECATED
 #else
-   // Try to approximate the effect of exclude_from_explicit_instantiation
-   // (which is that entities are not assumed to be provided by explicit
-   // template instantiations in the dylib) by always inlining those entities.
-#  define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION _LIBCPP_ALWAYS_INLINE
+#  define _LIBCPP_DEPRECATED_IN_CXX23
 #endif
 
-#ifndef _LIBCPP_HIDE_FROM_ABI_PER_TU
-#  ifndef _LIBCPP_HIDE_FROM_ABI_PER_TU_BY_DEFAULT
-#    define _LIBCPP_HIDE_FROM_ABI_PER_TU 0
+#  if !defined(_LIBCPP_HAS_NO_CHAR8_T)
+#    define _LIBCPP_DEPRECATED_WITH_CHAR8_T _LIBCPP_DEPRECATED
 #  else
-#    define _LIBCPP_HIDE_FROM_ABI_PER_TU 1
+#    define _LIBCPP_DEPRECATED_WITH_CHAR8_T
 #  endif
-#endif
 
-#ifndef _LIBCPP_HIDE_FROM_ABI
-#  if _LIBCPP_HIDE_FROM_ABI_PER_TU
-#    define _LIBCPP_HIDE_FROM_ABI _LIBCPP_HIDDEN _LIBCPP_INTERNAL_LINKAGE
+// Macros to enter and leave a state where deprecation warnings are suppressed.
+#  if defined(_LIBCPP_COMPILER_CLANG_BASED) || defined(_LIBCPP_COMPILER_GCC)
+#    define _LIBCPP_SUPPRESS_DEPRECATED_PUSH                                                                           \
+      _Pragma("GCC diagnostic push") _Pragma("GCC diagnostic ignored \"-Wdeprecated\"")                                \
+          _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"")
+#    define _LIBCPP_SUPPRESS_DEPRECATED_POP _Pragma("GCC diagnostic pop")
 #  else
-#    define _LIBCPP_HIDE_FROM_ABI _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
+#    define _LIBCPP_SUPPRESS_DEPRECATED_PUSH
+#    define _LIBCPP_SUPPRESS_DEPRECATED_POP
 #  endif
-#endif
 
-#ifdef _LIBCPP_BUILDING_LIBRARY
-#  if _LIBCPP_ABI_VERSION > 1
-#    define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI
+#  if _LIBCPP_STD_VER <= 11
+#    define _LIBCPP_EXPLICIT_AFTER_CXX11
 #  else
-#    define _LIBCPP_HIDE_FROM_ABI_AFTER_V1
+#    define _LIBCPP_EXPLICIT_AFTER_CXX11 explicit
 #  endif
-#else
-#  define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI
-#endif
-
-// Just so we can migrate to the new macros gradually.
-#define _LIBCPP_INLINE_VISIBILITY _LIBCPP_HIDE_FROM_ABI
-
-// Inline namespaces are available in Clang/GCC/MSVC regardless of C++ dialect.
-#define _LIBCPP_BEGIN_NAMESPACE_STD namespace std { inline namespace _LIBCPP_ABI_NAMESPACE {
-#define _LIBCPP_END_NAMESPACE_STD  } }
-#define _VSTD std::_LIBCPP_ABI_NAMESPACE
-_LIBCPP_BEGIN_NAMESPACE_STD _LIBCPP_END_NAMESPACE_STD
-
-#if _LIBCPP_STD_VER >= 17
-#define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM \
-  _LIBCPP_BEGIN_NAMESPACE_STD inline namespace __fs { namespace filesystem {
-#else
-#define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM \
-  _LIBCPP_BEGIN_NAMESPACE_STD namespace __fs { namespace filesystem {
-#endif
-
-#define _LIBCPP_END_NAMESPACE_FILESYSTEM \
-  _LIBCPP_END_NAMESPACE_STD } }
-
-#define _VSTD_FS _VSTD::__fs::filesystem
-
-#if __has_attribute(__enable_if__)
-#   define _LIBCPP_PREFERRED_OVERLOAD __attribute__ ((__enable_if__(true, "")))
-#endif
-
-#ifndef _LIBCPP_HAS_NO_NOEXCEPT
-#  define _NOEXCEPT noexcept
-#  define _NOEXCEPT_(x) noexcept(x)
-#else
-#  define _NOEXCEPT throw()
-#  define _NOEXCEPT_(x)
-#endif
-
-#ifdef _LIBCPP_HAS_NO_UNICODE_CHARS
-typedef unsigned short char16_t;
-typedef unsigned int   char32_t;
-#endif // _LIBCPP_HAS_NO_UNICODE_CHARS
-
-#ifndef __SIZEOF_INT128__
-#define _LIBCPP_HAS_NO_INT128
-#endif
-
-#ifdef _LIBCPP_CXX03_LANG
-# define static_assert(...) _Static_assert(__VA_ARGS__)
-# define decltype(...) __decltype(__VA_ARGS__)
-#endif // _LIBCPP_CXX03_LANG
-
-#ifdef _LIBCPP_CXX03_LANG
-#  define _LIBCPP_CONSTEXPR
-#else
-#  define _LIBCPP_CONSTEXPR constexpr
-#endif
-
-#ifndef __cpp_consteval
-#  define _LIBCPP_CONSTEVAL _LIBCPP_CONSTEXPR
-#else
-#  define _LIBCPP_CONSTEVAL consteval
-#endif
-
-#if !defined(__cpp_concepts) || __cpp_concepts < 201907L
-#define _LIBCPP_HAS_NO_CONCEPTS
-#endif
-
-#if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_HAS_NO_CONCEPTS)
-#define _LIBCPP_HAS_NO_RANGES
-#endif
 
-#ifdef _LIBCPP_CXX03_LANG
-#  define _LIBCPP_DEFAULT {}
-#else
-#  define _LIBCPP_DEFAULT = default;
-#endif
-
-#ifdef _LIBCPP_CXX03_LANG
-#  define _LIBCPP_EQUAL_DELETE
-#else
-#  define _LIBCPP_EQUAL_DELETE = delete
-#endif
-
-#ifdef __GNUC__
-#  define _LIBCPP_NOALIAS __attribute__((__malloc__))
-#else
-#  define _LIBCPP_NOALIAS
-#endif
-
-#if __has_attribute(using_if_exists)
-# define _LIBCPP_USING_IF_EXISTS __attribute__((using_if_exists))
-#else
-# define _LIBCPP_USING_IF_EXISTS
-#endif
-
-#ifdef _LIBCPP_HAS_NO_STRONG_ENUMS
-#  define _LIBCPP_DECLARE_STRONG_ENUM(x) struct _LIBCPP_TYPE_VIS x { enum __lx
-#  define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) \
-     __lx __v_; \
-     _LIBCPP_INLINE_VISIBILITY x(__lx __v) : __v_(__v) {} \
-     _LIBCPP_INLINE_VISIBILITY explicit x(int __v) : __v_(static_cast<__lx>(__v)) {} \
-     _LIBCPP_INLINE_VISIBILITY operator int() const {return __v_;} \
-     };
-#else  // _LIBCPP_HAS_NO_STRONG_ENUMS
-#  define _LIBCPP_DECLARE_STRONG_ENUM(x) enum class _LIBCPP_ENUM_VIS x
-#  define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x)
-#endif // _LIBCPP_HAS_NO_STRONG_ENUMS
-
-// _LIBCPP_DEBUG potential values:
-//  - undefined: No assertions. This is the default.
-//  - 0:         Basic assertions
-//  - 1:         Basic assertions + iterator validity checks.
-#if !defined(_LIBCPP_DEBUG)
-# define _LIBCPP_DEBUG_LEVEL 0
-#elif _LIBCPP_DEBUG == 0
-# define _LIBCPP_DEBUG_LEVEL 1
-#elif _LIBCPP_DEBUG == 1
-# define _LIBCPP_DEBUG_LEVEL 2
-#else
-# error Supported values for _LIBCPP_DEBUG are 0 and 1
-#endif
-
-// Libc++ allows disabling extern template instantiation declarations by
-// means of users defining _LIBCPP_DISABLE_EXTERN_TEMPLATE.
-//
-// Furthermore, when the Debug mode is enabled, we disable extern declarations
-// when building user code because we don't want to use the functions compiled
-// in the library, which might not have had the debug mode enabled when built.
-// However, some extern declarations need to be used, because code correctness
-// depends on it (several instances in <locale>). Those special declarations
-// are declared with _LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE, which is enabled
-// even when the debug mode is enabled.
-#if defined(_LIBCPP_DISABLE_EXTERN_TEMPLATE)
-#   define _LIBCPP_EXTERN_TEMPLATE(...) /* nothing */
-#   define _LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(...) /* nothing */
-#elif _LIBCPP_DEBUG_LEVEL >= 1 && !defined(_LIBCPP_BUILDING_LIBRARY)
-#   define _LIBCPP_EXTERN_TEMPLATE(...) /* nothing */
-#   define _LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(...) extern template __VA_ARGS__;
-#else
-#   define _LIBCPP_EXTERN_TEMPLATE(...) extern template __VA_ARGS__;
-#   define _LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(...) extern template __VA_ARGS__;
-#endif
-
-#if defined(__APPLE__) || defined(__FreeBSD__) || defined(_LIBCPP_MSVCRT_LIKE) || \
-    defined(__sun__) || defined(__NetBSD__) || defined(__CloudABI__)
-#define _LIBCPP_LOCALE__L_EXTENSIONS 1
-#endif
-
-#ifdef __FreeBSD__
-#define _DECLARE_C99_LDBL_MATH 1
-#endif
-
-// If we are getting operator new from the MSVC CRT, then allocation overloads
-// for align_val_t were added in 19.12, aka VS 2017 version 15.3.
-#if defined(_LIBCPP_MSVCRT) && defined(_MSC_VER) && _MSC_VER < 1912
-#  define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION
-#elif defined(_LIBCPP_ABI_VCRUNTIME) && !defined(__cpp_aligned_new)
-   // We're deferring to Microsoft's STL to provide aligned new et al. We don't
-   // have it unless the language feature test macro is defined.
-#  define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION
-#elif defined(__MVS__)
-#  define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION
-#endif
-
-#if defined(__APPLE__)
-#  if !defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && \
-      defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__)
-#    define __MAC_OS_X_VERSION_MIN_REQUIRED __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__
+#  if _LIBCPP_STD_VER > 11
+#    define _LIBCPP_CONSTEXPR_SINCE_CXX14 constexpr
+#  else
+#    define _LIBCPP_CONSTEXPR_SINCE_CXX14
 #  endif
-#endif // defined(__APPLE__)
-
-#if defined(_LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION) || \
-    (!defined(__cpp_aligned_new) || __cpp_aligned_new < 201606)
-#  define _LIBCPP_HAS_NO_ALIGNED_ALLOCATION
-#endif
-
-#if defined(__APPLE__) || defined(__FreeBSD__)
-#define _LIBCPP_HAS_DEFAULTRUNELOCALE
-#endif
-
-#if defined(__APPLE__) || defined(__FreeBSD__) || defined(__sun__)
-#define _LIBCPP_WCTYPE_IS_MASK
-#endif
 
-#if _LIBCPP_STD_VER <= 17 || !defined(__cpp_char8_t)
-#define _LIBCPP_HAS_NO_CHAR8_T
-#endif
-
-// Deprecation macros.
-//
-// Deprecations warnings are always enabled, except when users explicitly opt-out
-// by defining _LIBCPP_DISABLE_DEPRECATION_WARNINGS.
-#if !defined(_LIBCPP_DISABLE_DEPRECATION_WARNINGS)
-#  if __has_attribute(deprecated)
-#    define _LIBCPP_DEPRECATED __attribute__ ((deprecated))
-#  elif _LIBCPP_STD_VER > 11
-#    define _LIBCPP_DEPRECATED [[deprecated]]
+#  if _LIBCPP_STD_VER > 14
+#    define _LIBCPP_CONSTEXPR_SINCE_CXX17 constexpr
 #  else
-#    define _LIBCPP_DEPRECATED
+#    define _LIBCPP_CONSTEXPR_SINCE_CXX17
 #  endif
-#else
-#  define _LIBCPP_DEPRECATED
-#endif
-
-#if !defined(_LIBCPP_CXX03_LANG)
-#  define _LIBCPP_DEPRECATED_IN_CXX11 _LIBCPP_DEPRECATED
-#else
-#  define _LIBCPP_DEPRECATED_IN_CXX11
-#endif
-
-#if _LIBCPP_STD_VER >= 14
-#  define _LIBCPP_DEPRECATED_IN_CXX14 _LIBCPP_DEPRECATED
-#else
-#  define _LIBCPP_DEPRECATED_IN_CXX14
-#endif
-
-#if _LIBCPP_STD_VER >= 17
-#  define _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_DEPRECATED
-#else
-#  define _LIBCPP_DEPRECATED_IN_CXX17
-#endif
-
-#if _LIBCPP_STD_VER > 17
-#  define _LIBCPP_DEPRECATED_IN_CXX20 _LIBCPP_DEPRECATED
-#else
-#  define _LIBCPP_DEPRECATED_IN_CXX20
-#endif
-
-#if !defined(_LIBCPP_HAS_NO_CHAR8_T)
-#  define _LIBCPP_DEPRECATED_WITH_CHAR8_T _LIBCPP_DEPRECATED
-#else
-#  define _LIBCPP_DEPRECATED_WITH_CHAR8_T
-#endif
-
-// Macros to enter and leave a state where deprecation warnings are suppressed.
-#if defined(_LIBCPP_COMPILER_CLANG_BASED) || defined(_LIBCPP_COMPILER_GCC)
-#   define _LIBCPP_SUPPRESS_DEPRECATED_PUSH \
-        _Pragma("GCC diagnostic push") \
-        _Pragma("GCC diagnostic ignored \"-Wdeprecated\"") \
-        _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"")
-#   define _LIBCPP_SUPPRESS_DEPRECATED_POP \
-        _Pragma("GCC diagnostic pop")
-#else
-#   define _LIBCPP_SUPPRESS_DEPRECATED_PUSH
-#   define _LIBCPP_SUPPRESS_DEPRECATED_POP
-#endif
-
-#if _LIBCPP_STD_VER <= 11
-#  define _LIBCPP_EXPLICIT_AFTER_CXX11
-#else
-#  define _LIBCPP_EXPLICIT_AFTER_CXX11 explicit
-#endif
-
-#if _LIBCPP_STD_VER > 11 && !defined(_LIBCPP_HAS_NO_CXX14_CONSTEXPR)
-#  define _LIBCPP_CONSTEXPR_AFTER_CXX11 constexpr
-#else
-#  define _LIBCPP_CONSTEXPR_AFTER_CXX11
-#endif
 
-#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_CXX14_CONSTEXPR)
-#  define _LIBCPP_CONSTEXPR_AFTER_CXX14 constexpr
-#else
-#  define _LIBCPP_CONSTEXPR_AFTER_CXX14
-#endif
+#  if _LIBCPP_STD_VER > 17
+#    define _LIBCPP_CONSTEXPR_SINCE_CXX20 constexpr
+#  else
+#    define _LIBCPP_CONSTEXPR_SINCE_CXX20
+#  endif
 
-#if _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_CXX14_CONSTEXPR)
-#  define _LIBCPP_CONSTEXPR_AFTER_CXX17 constexpr
-#else
-#  define _LIBCPP_CONSTEXPR_AFTER_CXX17
-#endif
+#  if _LIBCPP_STD_VER > 20
+#    define _LIBCPP_CONSTEXPR_SINCE_CXX23 constexpr
+#  else
+#    define _LIBCPP_CONSTEXPR_SINCE_CXX23
+#  endif
 
-// The _LIBCPP_NODISCARD_ATTRIBUTE should only be used to define other
-// NODISCARD macros to the correct attribute.
-#if __has_cpp_attribute(nodiscard) || defined(_LIBCPP_COMPILER_MSVC)
-#  define _LIBCPP_NODISCARD_ATTRIBUTE [[nodiscard]]
-#elif defined(_LIBCPP_COMPILER_CLANG_BASED) && !defined(_LIBCPP_CXX03_LANG)
-#  define _LIBCPP_NODISCARD_ATTRIBUTE [[clang::warn_unused_result]]
-#else
+#  if __has_cpp_attribute(nodiscard)
+#    define _LIBCPP_NODISCARD [[nodiscard]]
+#  else
 // We can't use GCC's [[gnu::warn_unused_result]] and
 // __attribute__((warn_unused_result)), because GCC does not silence them via
 // (void) cast.
-#  define _LIBCPP_NODISCARD_ATTRIBUTE
-#endif
+#    define _LIBCPP_NODISCARD
+#  endif
 
 // _LIBCPP_NODISCARD_EXT may be used to apply [[nodiscard]] to entities not
 // specified as such as an extension.
-#if defined(_LIBCPP_ENABLE_NODISCARD) && !defined(_LIBCPP_DISABLE_NODISCARD_EXT)
-#  define _LIBCPP_NODISCARD_EXT _LIBCPP_NODISCARD_ATTRIBUTE
-#else
-#  define _LIBCPP_NODISCARD_EXT
-#endif
-
-#if !defined(_LIBCPP_DISABLE_NODISCARD_AFTER_CXX17) && \
-    (_LIBCPP_STD_VER > 17 || defined(_LIBCPP_ENABLE_NODISCARD))
-#  define _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_NODISCARD_ATTRIBUTE
-#else
-#  define _LIBCPP_NODISCARD_AFTER_CXX17
-#endif
-
-#if _LIBCPP_STD_VER > 14 && defined(__cpp_inline_variables) && (__cpp_inline_variables >= 201606L)
-#  define _LIBCPP_INLINE_VAR inline
-#else
-#  define _LIBCPP_INLINE_VAR
-#endif
+#  if !defined(_LIBCPP_DISABLE_NODISCARD_EXT)
+#    define _LIBCPP_NODISCARD_EXT _LIBCPP_NODISCARD
+#  else
+#    define _LIBCPP_NODISCARD_EXT
+#  endif
 
-#if defined(_LIBCPP_DEBUG) || defined(_LIBCPP_HAS_NO_CXX14_CONSTEXPR)
-#   define _LIBCPP_CONSTEXPR_IF_NODEBUG
-#else
-#   define _LIBCPP_CONSTEXPR_IF_NODEBUG constexpr
-#endif
+#  if _LIBCPP_STD_VER > 17 || !defined(_LIBCPP_DISABLE_NODISCARD_EXT)
+#    define _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_NODISCARD
+#  else
+#    define _LIBCPP_NODISCARD_AFTER_CXX17
+#  endif
 
-#if __has_attribute(no_destroy)
-#  define _LIBCPP_NO_DESTROY __attribute__((__no_destroy__))
-#else
-#  define _LIBCPP_NO_DESTROY
-#endif
+#  if __has_attribute(__no_destroy__)
+#    define _LIBCPP_NO_DESTROY __attribute__((__no_destroy__))
+#  else
+#    define _LIBCPP_NO_DESTROY
+#  endif
 
-#ifndef _LIBCPP_HAS_NO_ASAN
-extern "C" _LIBCPP_FUNC_VIS void __sanitizer_annotate_contiguous_container(
-  const void *, const void *, const void *, const void *);
-#endif
+#  ifndef _LIBCPP_HAS_NO_ASAN
+    extern "C" _LIBCPP_FUNC_VIS void
+    __sanitizer_annotate_contiguous_container(const void*, const void*, const void*, const void*);
+#  endif
 
 // Try to find out if RTTI is disabled.
-#if defined(_LIBCPP_COMPILER_CLANG_BASED) && !__has_feature(cxx_rtti)
-#  define _LIBCPP_NO_RTTI
-#elif defined(__GNUC__) && !defined(__GXX_RTTI)
-#  define _LIBCPP_NO_RTTI
-#elif defined(_LIBCPP_COMPILER_MSVC) && !defined(_CPPRTTI)
-#  define _LIBCPP_NO_RTTI
-#endif
+#  if !defined(__cpp_rtti) || __cpp_rtti < 199711L
+#    define _LIBCPP_HAS_NO_RTTI
+#  endif
 
-#ifndef _LIBCPP_WEAK
-#define _LIBCPP_WEAK __attribute__((__weak__))
-#endif
+#  ifndef _LIBCPP_WEAK
+#    define _LIBCPP_WEAK __attribute__((__weak__))
+#  endif
 
 // Thread API
-#if !defined(_LIBCPP_HAS_NO_THREADS) && \
-    !defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && \
-    !defined(_LIBCPP_HAS_THREAD_API_WIN32) && \
-    !defined(_LIBCPP_HAS_THREAD_API_EXTERNAL)
-#  if defined(__FreeBSD__) || \
-      defined(__wasi__) || \
-      defined(__NetBSD__) || \
-      defined(__OpenBSD__) || \
-      defined(__NuttX__) || \
-      defined(__linux__) || \
-      defined(__GNU__) || \
-      defined(__APPLE__) || \
-      defined(__CloudABI__) || \
-      defined(__sun__) || \
-      defined(__MVS__) || \
-      defined(_AIX) || \
-      (defined(__MINGW32__) && __has_include(<pthread.h>))
-#    define _LIBCPP_HAS_THREAD_API_PTHREAD
-#  elif defined(__Fuchsia__)
-     // TODO(44575): Switch to C11 thread API when possible.
-#    define _LIBCPP_HAS_THREAD_API_PTHREAD
-#  elif defined(_LIBCPP_WIN32API)
-#    define _LIBCPP_HAS_THREAD_API_WIN32
-#  else
-#    error "No thread API"
-#  endif // _LIBCPP_HAS_THREAD_API
-#endif // _LIBCPP_HAS_NO_THREADS
-
-#if defined(_LIBCPP_HAS_THREAD_API_PTHREAD)
-#if defined(__ANDROID__) && __ANDROID_API__ >= 30
-#define _LIBCPP_HAS_COND_CLOCKWAIT
-#elif defined(_LIBCPP_GLIBC_PREREQ)
-#if _LIBCPP_GLIBC_PREREQ(2, 30)
-#define _LIBCPP_HAS_COND_CLOCKWAIT
-#endif
-#endif
-#endif
+// clang-format off
+#  if !defined(_LIBCPP_HAS_NO_THREADS) &&                                                                              \
+      !defined(_LIBCPP_HAS_THREAD_API_PTHREAD) &&                                                                      \
+      !defined(_LIBCPP_HAS_THREAD_API_WIN32) &&                                                                        \
+      !defined(_LIBCPP_HAS_THREAD_API_EXTERNAL)
+
+#    if defined(__FreeBSD__) ||                                                                                        \
+        defined(__wasi__) ||                                                                                           \
+        defined(__NetBSD__) ||                                                                                         \
+        defined(__OpenBSD__) ||                                                                                        \
+        defined(__NuttX__) ||                                                                                          \
+        defined(__linux__) ||                                                                                          \
+        defined(__GNU__) ||                                                                                            \
+        defined(__APPLE__) ||                                                                                          \
+        defined(__sun__) ||                                                                                            \
+        defined(__MVS__) ||                                                                                            \
+        defined(_AIX) ||                                                                                               \
+        defined(__EMSCRIPTEN__)
+// clang-format on
+#      define _LIBCPP_HAS_THREAD_API_PTHREAD
+#    elif defined(__Fuchsia__)
+// TODO(44575): Switch to C11 thread API when possible.
+#      define _LIBCPP_HAS_THREAD_API_PTHREAD
+#    elif defined(_LIBCPP_WIN32API)
+#      define _LIBCPP_HAS_THREAD_API_WIN32
+#    else
+#      error "No thread API"
+#    endif // _LIBCPP_HAS_THREAD_API
+#  endif   // _LIBCPP_HAS_NO_THREADS
+
+#  if defined(_LIBCPP_HAS_THREAD_API_PTHREAD)
+#    if defined(__ANDROID__) && __ANDROID_API__ >= 30
+#      define _LIBCPP_HAS_COND_CLOCKWAIT
+#    elif defined(_LIBCPP_GLIBC_PREREQ)
+#      if _LIBCPP_GLIBC_PREREQ(2, 30)
+#        define _LIBCPP_HAS_COND_CLOCKWAIT
+#      endif
+#    endif
+#  endif
 
-#if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_PTHREAD)
-#error _LIBCPP_HAS_THREAD_API_PTHREAD may only be defined when \
+#  if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_PTHREAD)
+#    error _LIBCPP_HAS_THREAD_API_PTHREAD may only be defined when \
        _LIBCPP_HAS_NO_THREADS is not defined.
-#endif
+#  endif
 
-#if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_EXTERNAL)
-#error _LIBCPP_HAS_THREAD_API_EXTERNAL may not be defined when \
+#  if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_EXTERNAL)
+#    error _LIBCPP_HAS_THREAD_API_EXTERNAL may not be defined when \
        _LIBCPP_HAS_NO_THREADS is defined.
-#endif
+#  endif
 
-#if defined(_LIBCPP_HAS_NO_MONOTONIC_CLOCK) && !defined(_LIBCPP_HAS_NO_THREADS)
-#error _LIBCPP_HAS_NO_MONOTONIC_CLOCK may only be defined when \
+#  if defined(_LIBCPP_HAS_NO_MONOTONIC_CLOCK) && !defined(_LIBCPP_HAS_NO_THREADS)
+#    error _LIBCPP_HAS_NO_MONOTONIC_CLOCK may only be defined when \
        _LIBCPP_HAS_NO_THREADS is defined.
-#endif
+#  endif
 
-#if !defined(_LIBCPP_HAS_NO_THREADS) && !defined(__STDCPP_THREADS__)
-#define __STDCPP_THREADS__ 1
-#endif
+#  if !defined(_LIBCPP_HAS_NO_THREADS) && !defined(__STDCPP_THREADS__)
+#    define __STDCPP_THREADS__ 1
+#  endif
 
 // The glibc and Bionic implementation of pthreads implements
 // pthread_mutex_destroy as nop for regular mutexes. Additionally, Win32
@@ -1199,11 +982,13 @@ extern "C" _LIBCPP_FUNC_VIS void __sanitizer_annotate_contiguous_container(
 //
 // TODO(EricWF): Enable this optimization on Bionic after speaking to their
 //               respective stakeholders.
-#if (defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && defined(__GLIBC__)) \
-  || (defined(_LIBCPP_HAS_THREAD_API_C11) && defined(__Fuchsia__)) \
-  || defined(_LIBCPP_HAS_THREAD_API_WIN32)
-# define _LIBCPP_HAS_TRIVIAL_MUTEX_DESTRUCTION
-#endif
+// clang-format off
+#  if (defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && defined(__GLIBC__)) ||                                               \
+      (defined(_LIBCPP_HAS_THREAD_API_C11) && defined(__Fuchsia__)) ||                                                 \
+       defined(_LIBCPP_HAS_THREAD_API_WIN32)
+// clang-format on
+#    define _LIBCPP_HAS_TRIVIAL_MUTEX_DESTRUCTION
+#  endif
 
 // Destroying a condvar is a nop on Windows.
 //
@@ -1213,260 +998,274 @@ extern "C" _LIBCPP_FUNC_VIS void __sanitizer_annotate_contiguous_container(
 //
 // TODO(EricWF): This is potentially true for some pthread implementations
 // as well.
-#if (defined(_LIBCPP_HAS_THREAD_API_C11) && defined(__Fuchsia__)) || \
-     defined(_LIBCPP_HAS_THREAD_API_WIN32)
-# define _LIBCPP_HAS_TRIVIAL_CONDVAR_DESTRUCTION
-#endif
-
-// Systems that use capability-based security (FreeBSD with Capsicum,
-// Nuxi CloudABI) may only provide local filesystem access (using *at()).
-// Functions like open(), rename(), unlink() and stat() should not be
-// used, as they attempt to access the global filesystem namespace.
-#ifdef __CloudABI__
-#define _LIBCPP_HAS_NO_GLOBAL_FILESYSTEM_NAMESPACE
-#endif
-
-// CloudABI is intended for running networked services. Processes do not
-// have standard input and output channels.
-#ifdef __CloudABI__
-#define _LIBCPP_HAS_NO_STDIN
-#define _LIBCPP_HAS_NO_STDOUT
-#endif
+#  if (defined(_LIBCPP_HAS_THREAD_API_C11) && defined(__Fuchsia__)) || defined(_LIBCPP_HAS_THREAD_API_WIN32)
+#    define _LIBCPP_HAS_TRIVIAL_CONDVAR_DESTRUCTION
+#  endif
 
 // Some systems do not provide gets() in their C library, for security reasons.
-#if defined(_LIBCPP_MSVCRT) || \
-    (defined(__FreeBSD_version) && __FreeBSD_version >= 1300043) || \
-    defined(__OpenBSD__)
-#   define _LIBCPP_C_HAS_NO_GETS
-#endif
-
-#if defined(__BIONIC__) || defined(__CloudABI__) || defined(__NuttX__) ||      \
-    defined(__Fuchsia__) || defined(__wasi__) || defined(_LIBCPP_HAS_MUSL_LIBC) || \
-    defined(__MVS__) || defined(__OpenBSD__)
-#define _LIBCPP_PROVIDES_DEFAULT_RUNE_TABLE
-#endif
-
-// Thread-unsafe functions such as strtok() and localtime()
-// are not available.
-#ifdef __CloudABI__
-#define _LIBCPP_HAS_NO_THREAD_UNSAFE_C_FUNCTIONS
-#endif
+#  if defined(_LIBCPP_MSVCRT) || (defined(__FreeBSD_version) && __FreeBSD_version >= 1300043) || defined(__OpenBSD__)
+#    define _LIBCPP_C_HAS_NO_GETS
+#  endif
 
-#if __has_feature(cxx_atomic) || __has_extension(c_atomic) || __has_keyword(_Atomic)
-#  define _LIBCPP_HAS_C_ATOMIC_IMP
-#elif defined(_LIBCPP_COMPILER_GCC)
-#  define _LIBCPP_HAS_GCC_ATOMIC_IMP
-#endif
+#  if defined(__BIONIC__) || defined(__NuttX__) || defined(__Fuchsia__) || defined(__wasi__) ||                        \
+      defined(_LIBCPP_HAS_MUSL_LIBC) || defined(__OpenBSD__)
+#    define _LIBCPP_PROVIDES_DEFAULT_RUNE_TABLE
+#  endif
 
-#if (!defined(_LIBCPP_HAS_C_ATOMIC_IMP) && \
-     !defined(_LIBCPP_HAS_GCC_ATOMIC_IMP) && \
-     !defined(_LIBCPP_HAS_EXTERNAL_ATOMIC_IMP)) \
-     || defined(_LIBCPP_HAS_NO_THREADS)
-#  define _LIBCPP_HAS_NO_ATOMIC_HEADER
-#else
-#  ifndef _LIBCPP_ATOMIC_FLAG_TYPE
-#    define _LIBCPP_ATOMIC_FLAG_TYPE bool
+#  if __has_feature(cxx_atomic) || __has_extension(c_atomic) || __has_keyword(_Atomic)
+#    define _LIBCPP_HAS_C_ATOMIC_IMP
+#  elif defined(_LIBCPP_COMPILER_GCC)
+#    define _LIBCPP_HAS_GCC_ATOMIC_IMP
 #  endif
-#  ifdef _LIBCPP_FREESTANDING
-#    define _LIBCPP_ATOMIC_ONLY_USE_BUILTINS
+
+#  if !defined(_LIBCPP_HAS_C_ATOMIC_IMP) && !defined(_LIBCPP_HAS_GCC_ATOMIC_IMP) &&                                    \
+      !defined(_LIBCPP_HAS_EXTERNAL_ATOMIC_IMP)
+#    define _LIBCPP_HAS_NO_ATOMIC_HEADER
+#  else
+#    ifndef _LIBCPP_ATOMIC_FLAG_TYPE
+#      define _LIBCPP_ATOMIC_FLAG_TYPE bool
+#    endif
+#    ifdef _LIBCPP_FREESTANDING
+#      define _LIBCPP_ATOMIC_ONLY_USE_BUILTINS
+#    endif
 #  endif
-#endif
 
-#ifndef _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK
-#define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK
-#endif
+#  ifndef _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK
+#    define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK
+#  endif
 
-#if defined(_LIBCPP_ENABLE_THREAD_SAFETY_ANNOTATIONS)
-#  if defined(__clang__) && __has_attribute(acquire_capability)
+#  if defined(_LIBCPP_ENABLE_THREAD_SAFETY_ANNOTATIONS)
+#    if defined(__clang__) && __has_attribute(acquire_capability)
 // Work around the attribute handling in clang.  When both __declspec and
 // __attribute__ are present, the processing goes awry preventing the definition
-// of the types.
-#    if !defined(_LIBCPP_OBJECT_FORMAT_COFF)
-#      define _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS
+// of the types. In MinGW mode, __declspec evaluates to __attribute__, and thus
+// combining the two does work.
+#      if !defined(_MSC_VER)
+#        define _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS
+#      endif
 #    endif
 #  endif
-#endif
-
-#ifdef _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS
-#   define _LIBCPP_THREAD_SAFETY_ANNOTATION(x) __attribute__((x))
-#else
-#   define _LIBCPP_THREAD_SAFETY_ANNOTATION(x)
-#endif
-
-#if __has_attribute(require_constant_initialization)
-#  define _LIBCPP_SAFE_STATIC __attribute__((__require_constant_initialization__))
-#else
-#  define _LIBCPP_SAFE_STATIC
-#endif
 
-#if !__has_builtin(__builtin_addressof) && _GNUC_VER < 700
-#define _LIBCPP_HAS_NO_BUILTIN_ADDRESSOF
-#endif
+#  ifdef _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS
+#    define _LIBCPP_THREAD_SAFETY_ANNOTATION(x) __attribute__((x))
+#  else
+#    define _LIBCPP_THREAD_SAFETY_ANNOTATION(x)
+#  endif
 
-#if !__has_builtin(__builtin_is_constant_evaluated) && _GNUC_VER < 900
-#define _LIBCPP_HAS_NO_BUILTIN_IS_CONSTANT_EVALUATED
-#endif
+#  if _LIBCPP_STD_VER > 17
+#    define _LIBCPP_CONSTINIT constinit
+#  elif __has_attribute(__require_constant_initialization__)
+#    define _LIBCPP_CONSTINIT __attribute__((__require_constant_initialization__))
+#  else
+#    define _LIBCPP_CONSTINIT
+#  endif
 
-#if __has_attribute(diagnose_if) && !defined(_LIBCPP_DISABLE_ADDITIONAL_DIAGNOSTICS)
-#  define _LIBCPP_DIAGNOSE_WARNING(...) \
-     __attribute__((diagnose_if(__VA_ARGS__, "warning")))
-#  define _LIBCPP_DIAGNOSE_ERROR(...) \
-     __attribute__((diagnose_if(__VA_ARGS__, "error")))
-#else
-#  define _LIBCPP_DIAGNOSE_WARNING(...)
-#  define _LIBCPP_DIAGNOSE_ERROR(...)
-#endif
+#  if __has_attribute(__diagnose_if__) && !defined(_LIBCPP_DISABLE_ADDITIONAL_DIAGNOSTICS)
+#    define _LIBCPP_DIAGNOSE_WARNING(...) __attribute__((__diagnose_if__(__VA_ARGS__, "warning")))
+#  else
+#    define _LIBCPP_DIAGNOSE_WARNING(...)
+#  endif
 
 // Use a function like macro to imply that it must be followed by a semicolon
-#if __cplusplus > 201402L && __has_cpp_attribute(fallthrough)
-#  define _LIBCPP_FALLTHROUGH() [[fallthrough]]
-#elif __has_cpp_attribute(clang::fallthrough)
-#  define _LIBCPP_FALLTHROUGH() [[clang::fallthrough]]
-#elif __has_attribute(fallthrough) || _GNUC_VER >= 700
-#  define _LIBCPP_FALLTHROUGH() __attribute__((__fallthrough__))
-#else
-#  define _LIBCPP_FALLTHROUGH() ((void)0)
-#endif
-
-#if __has_attribute(__nodebug__)
-#define _LIBCPP_NODEBUG __attribute__((__nodebug__))
-#else
-#define _LIBCPP_NODEBUG
-#endif
-
-#if __has_attribute(__nodebug__) && (defined(_LIBCPP_CLANG_VER) && _LIBCPP_CLANG_VER >= 900)
-#   define _LIBCPP_NODEBUG_TYPE __attribute__((nodebug))
-#else
-#   define _LIBCPP_NODEBUG_TYPE
-#endif
-
-#if __has_attribute(__standalone_debug__)
-#define _LIBCPP_STANDALONE_DEBUG __attribute__((__standalone_debug__))
-#else
-#define _LIBCPP_STANDALONE_DEBUG
-#endif
-
-#if __has_attribute(__preferred_name__)
-#define _LIBCPP_PREFERRED_NAME(x) __attribute__((__preferred_name__(x)))
-#else
-#define _LIBCPP_PREFERRED_NAME(x)
-#endif
-
-#if defined(_LIBCPP_ABI_MICROSOFT) && \
-    (defined(_LIBCPP_COMPILER_MSVC) || __has_declspec_attribute(empty_bases))
-#  define _LIBCPP_DECLSPEC_EMPTY_BASES __declspec(empty_bases)
-#else
-#  define _LIBCPP_DECLSPEC_EMPTY_BASES
-#endif
+#  if __has_cpp_attribute(fallthrough)
+#    define _LIBCPP_FALLTHROUGH() [[fallthrough]]
+#  elif __has_attribute(__fallthrough__)
+#    define _LIBCPP_FALLTHROUGH() __attribute__((__fallthrough__))
+#  else
+#    define _LIBCPP_FALLTHROUGH() ((void)0)
+#  endif
 
-#if defined(_LIBCPP_ENABLE_CXX17_REMOVED_FEATURES)
-#define _LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR
-#define _LIBCPP_ENABLE_CXX17_REMOVED_BINDERS
-#define _LIBCPP_ENABLE_CXX17_REMOVED_RANDOM_SHUFFLE
-#define _LIBCPP_ENABLE_CXX17_REMOVED_UNEXPECTED_FUNCTIONS
-#endif // _LIBCPP_ENABLE_CXX17_REMOVED_FEATURES
-
-#if defined(_LIBCPP_ENABLE_CXX20_REMOVED_FEATURES)
-#define _LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_MEMBERS
-#define _LIBCPP_ENABLE_CXX20_REMOVED_BINDER_TYPEDEFS
-#define _LIBCPP_ENABLE_CXX20_REMOVED_NEGATORS
-#define _LIBCPP_ENABLE_CXX20_REMOVED_RAW_STORAGE_ITERATOR
-#define _LIBCPP_ENABLE_CXX20_REMOVED_TYPE_TRAITS
-#endif // _LIBCPP_ENABLE_CXX20_REMOVED_FEATURES
-
-#if !defined(__cpp_deduction_guides) || __cpp_deduction_guides < 201611
-#define _LIBCPP_HAS_NO_DEDUCTION_GUIDES
-#endif
+#  if __has_cpp_attribute(_Clang::__lifetimebound__)
+#    define _LIBCPP_LIFETIMEBOUND [[_Clang::__lifetimebound__]]
+#  else
+#    define _LIBCPP_LIFETIMEBOUND
+#  endif
 
-#if !__has_keyword(__is_aggregate) && (_GNUC_VER_NEW < 7001)
-#define _LIBCPP_HAS_NO_IS_AGGREGATE
-#endif
+#  if __has_attribute(__nodebug__)
+#    define _LIBCPP_NODEBUG __attribute__((__nodebug__))
+#  else
+#    define _LIBCPP_NODEBUG
+#  endif
 
-#if !defined(__cpp_coroutines) || __cpp_coroutines < 201703L
-#define _LIBCPP_HAS_NO_COROUTINES
-#endif
+#  if __has_attribute(__standalone_debug__)
+#    define _LIBCPP_STANDALONE_DEBUG __attribute__((__standalone_debug__))
+#  else
+#    define _LIBCPP_STANDALONE_DEBUG
+#  endif
 
-#if !defined(__cpp_impl_three_way_comparison) || __cpp_impl_three_way_comparison < 201907L
-#define _LIBCPP_HAS_NO_SPACESHIP_OPERATOR
-#endif
+#  if __has_attribute(__preferred_name__)
+#    define _LIBCPP_PREFERRED_NAME(x) __attribute__((__preferred_name__(x)))
+#  else
+#    define _LIBCPP_PREFERRED_NAME(x)
+#  endif
 
-#if defined(_LIBCPP_COMPILER_IBM)
-#define _LIBCPP_HAS_NO_PRAGMA_PUSH_POP_MACRO
-#endif
+// We often repeat things just for handling wide characters in the library.
+// When wide characters are disabled, it can be useful to have a quick way of
+// disabling it without having to resort to #if-#endif, which has a larger
+// impact on readability.
+#  if defined(_LIBCPP_HAS_NO_WIDE_CHARACTERS)
+#    define _LIBCPP_IF_WIDE_CHARACTERS(...)
+#  else
+#    define _LIBCPP_IF_WIDE_CHARACTERS(...) __VA_ARGS__
+#  endif
 
-#if defined(_LIBCPP_HAS_NO_PRAGMA_PUSH_POP_MACRO)
-#  define _LIBCPP_PUSH_MACROS
-#  define _LIBCPP_POP_MACROS
-#else
-  // Don't warn about macro conflicts when we can restore them at the
-  // end of the header.
-#  ifndef _LIBCPP_DISABLE_MACRO_CONFLICT_WARNINGS
-#    define _LIBCPP_DISABLE_MACRO_CONFLICT_WARNINGS
-#  endif
-#  if defined(_LIBCPP_COMPILER_MSVC)
-#    define _LIBCPP_PUSH_MACROS    \
-       __pragma(push_macro("min")) \
-       __pragma(push_macro("max"))
-#    define _LIBCPP_POP_MACROS     \
-       __pragma(pop_macro("min"))  \
-       __pragma(pop_macro("max"))
+#  if defined(_LIBCPP_ABI_MICROSOFT) && __has_declspec_attribute(empty_bases)
+#    define _LIBCPP_DECLSPEC_EMPTY_BASES __declspec(empty_bases)
 #  else
-#    define _LIBCPP_PUSH_MACROS        \
-       _Pragma("push_macro(\"min\")")  \
-       _Pragma("push_macro(\"max\")")
-#    define _LIBCPP_POP_MACROS         \
-       _Pragma("pop_macro(\"min\")")   \
-       _Pragma("pop_macro(\"max\")")
+#    define _LIBCPP_DECLSPEC_EMPTY_BASES
 #  endif
-#endif // defined(_LIBCPP_HAS_NO_PRAGMA_PUSH_POP_MACRO)
 
-#ifndef _LIBCPP_NO_AUTO_LINK
-#  if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY)
-#    if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
-#      pragma comment(lib, "c++.lib")
-#    else
-#      pragma comment(lib, "libc++.lib")
-#    endif
-#  endif // defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY)
-#endif // _LIBCPP_NO_AUTO_LINK
+#  if defined(_LIBCPP_ENABLE_CXX17_REMOVED_FEATURES)
+#    define _LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR
+#    define _LIBCPP_ENABLE_CXX17_REMOVED_BINDERS
+#    define _LIBCPP_ENABLE_CXX17_REMOVED_RANDOM_SHUFFLE
+#    define _LIBCPP_ENABLE_CXX17_REMOVED_UNEXPECTED_FUNCTIONS
+#    define _LIBCPP_ENABLE_CXX17_REMOVED_UNARY_BINARY_FUNCTION
+#  endif // _LIBCPP_ENABLE_CXX17_REMOVED_FEATURES
+
+#  if defined(_LIBCPP_ENABLE_CXX20_REMOVED_FEATURES)
+#    define _LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_MEMBERS
+#    define _LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_VOID_SPECIALIZATION
+#    define _LIBCPP_ENABLE_CXX20_REMOVED_BINDER_TYPEDEFS
+#    define _LIBCPP_ENABLE_CXX20_REMOVED_NEGATORS
+#    define _LIBCPP_ENABLE_CXX20_REMOVED_RAW_STORAGE_ITERATOR
+#    define _LIBCPP_ENABLE_CXX20_REMOVED_TYPE_TRAITS
+#  endif // _LIBCPP_ENABLE_CXX20_REMOVED_FEATURES
+
+#  define _LIBCPP_PUSH_MACROS _Pragma("push_macro(\"min\")") _Pragma("push_macro(\"max\")")
+#  define _LIBCPP_POP_MACROS _Pragma("pop_macro(\"min\")") _Pragma("pop_macro(\"max\")")
+
+#  ifndef _LIBCPP_NO_AUTO_LINK
+#    if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY)
+#      if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
+#        pragma comment(lib, "c++.lib")
+#      else
+#        pragma comment(lib, "libc++.lib")
+#      endif
+#    endif // defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY)
+#  endif   // _LIBCPP_NO_AUTO_LINK
 
 // Configures the fopen close-on-exec mode character, if any. This string will
 // be appended to any mode string used by fstream for fopen/fdopen.
 //
 // Not all platforms support this, but it helps avoid fd-leaks on platforms that
 // do.
-#if defined(__BIONIC__)
-#  define _LIBCPP_FOPEN_CLOEXEC_MODE "e"
-#else
-#  define _LIBCPP_FOPEN_CLOEXEC_MODE
-#endif
-
-#ifdef _LIBCPP_COMPILER_HAS_BUILTIN_CONSTANT_P
-#define _LIBCPP_BUILTIN_CONSTANT_P(x) __builtin_constant_p(x)
-#else
-#define _LIBCPP_BUILTIN_CONSTANT_P(x) false
-#endif
+#  if defined(__BIONIC__)
+#    define _LIBCPP_FOPEN_CLOEXEC_MODE "e"
+#  else
+#    define _LIBCPP_FOPEN_CLOEXEC_MODE
+#  endif
 
 // Support for _FILE_OFFSET_BITS=64 landed gradually in Android, so the full set
 // of functions used in cstdio may not be available for low API levels when
 // using 64-bit file offsets on LP32.
-#if defined(__BIONIC__) && defined(__USE_FILE_OFFSET64) && __ANDROID_API__ < 24
-#define _LIBCPP_HAS_NO_FGETPOS_FSETPOS
-#endif
+#  if defined(__BIONIC__) && defined(__USE_FILE_OFFSET64) && __ANDROID_API__ < 24
+#    define _LIBCPP_HAS_NO_FGETPOS_FSETPOS
+#  endif
 
-#if __has_attribute(init_priority)
-# define _LIBCPP_INIT_PRIORITY_MAX __attribute__((init_priority(101)))
-#else
-# define _LIBCPP_INIT_PRIORITY_MAX
-#endif
+#  if __has_attribute(__init_priority__)
+#    define _LIBCPP_INIT_PRIORITY_MAX __attribute__((__init_priority__(100)))
+#  else
+#    define _LIBCPP_INIT_PRIORITY_MAX
+#  endif
+
+#  if __has_attribute(__format__)
+// The attribute uses 1-based indices for ordinary and static member functions.
+// The attribute uses 2-based indices for non-static member functions.
+#    define _LIBCPP_ATTRIBUTE_FORMAT(archetype, format_string_index, first_format_arg_index)                           \
+      __attribute__((__format__(archetype, format_string_index, first_format_arg_index)))
+#  else
+#    define _LIBCPP_ATTRIBUTE_FORMAT(archetype, format_string_index, first_format_arg_index) /* nothing */
+#  endif
+
+#  if __has_cpp_attribute(msvc::no_unique_address)
+// MSVC implements [[no_unique_address]] as a silent no-op currently.
+// (If/when MSVC breaks its C++ ABI, it will be changed to work as intended.)
+// However, MSVC implements [[msvc::no_unique_address]] which does what
+// [[no_unique_address]] is supposed to do, in general.
+
+// Clang-cl does not yet (14.0) implement either [[no_unique_address]] or
+// [[msvc::no_unique_address]] though. If/when it does implement
+// [[msvc::no_unique_address]], this should be preferred though.
+#    define _LIBCPP_NO_UNIQUE_ADDRESS [[msvc::no_unique_address]]
+#  elif __has_cpp_attribute(no_unique_address)
+#    define _LIBCPP_NO_UNIQUE_ADDRESS [[no_unique_address]]
+#  else
+#    define _LIBCPP_NO_UNIQUE_ADDRESS /* nothing */
+// Note that this can be replaced by #error as soon as clang-cl
+// implements msvc::no_unique_address, since there should be no C++20
+// compiler that doesn't support one of the two attributes at that point.
+// We generally don't want to use this macro outside of C++20-only code,
+// because using it conditionally in one language version only would make
+// the ABI inconsistent.
+#  endif
+
+#  ifdef _LIBCPP_COMPILER_CLANG_BASED
+#    define _LIBCPP_DIAGNOSTIC_PUSH _Pragma("clang diagnostic push")
+#    define _LIBCPP_DIAGNOSTIC_POP _Pragma("clang diagnostic pop")
+#    define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED(str) _Pragma(_LIBCPP_TOSTRING(clang diagnostic ignored str))
+#    define _LIBCPP_GCC_DIAGNOSTIC_IGNORED(str)
+#  elif defined(_LIBCPP_COMPILER_GCC)
+#    define _LIBCPP_DIAGNOSTIC_PUSH _Pragma("GCC diagnostic push")
+#    define _LIBCPP_DIAGNOSTIC_POP _Pragma("GCC diagnostic pop")
+#    define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED(str)
+#    define _LIBCPP_GCC_DIAGNOSTIC_IGNORED(str) _Pragma(_LIBCPP_TOSTRING(GCC diagnostic ignored str))
+#  else
+#    define _LIBCPP_DIAGNOSTIC_PUSH
+#    define _LIBCPP_DIAGNOSTIC_POP
+#    define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED(str)
+#    define _LIBCPP_GCC_DIAGNOSTIC_IGNORED(str)
+#  endif
 
-#if defined(__GNUC__) || defined(__clang__)
-#define _LIBCPP_FORMAT_PRINTF(a, b)                                            \
-  __attribute__((__format__(__printf__, a, b)))
+#  if defined(_AIX) && !defined(_LIBCPP_COMPILER_GCC)
+#    define _LIBCPP_PACKED_BYTE_FOR_AIX _Pragma("pack(1)")
+#    define _LIBCPP_PACKED_BYTE_FOR_AIX_END _Pragma("pack(pop)")
+#  else
+#    define _LIBCPP_PACKED_BYTE_FOR_AIX     /* empty */
+#    define _LIBCPP_PACKED_BYTE_FOR_AIX_END /* empty */
+#  endif
+
+#  if __has_attribute(__packed__)
+#    define _LIBCPP_PACKED __attribute__((__packed__))
+#  else
+#    define _LIBCPP_PACKED
+#  endif
+
+// c8rtomb() and mbrtoc8() were added in C++20 and C23. Support for these
+// functions is gradually being added to existing C libraries. The conditions
+// below check for known C library versions and conditions under which these
+// functions are declared by the C library.
+#  define _LIBCPP_HAS_NO_C8RTOMB_MBRTOC8
+// GNU libc 2.36 and newer declare c8rtomb() and mbrtoc8() in C++ modes if
+// __cpp_char8_t is defined or if C2X extensions are enabled. Determining
+// the latter depends on internal GNU libc details that are not appropriate
+// to depend on here, so any declarations present when __cpp_char8_t is not
+// defined are ignored.
+#  if defined(_LIBCPP_GLIBC_PREREQ)
+#    if _LIBCPP_GLIBC_PREREQ(2, 36) && defined(__cpp_char8_t)
+#      undef _LIBCPP_HAS_NO_C8RTOMB_MBRTOC8
+#    endif
+#  endif
+
+// There are a handful of public standard library types that are intended to
+// support CTAD but don't need any explicit deduction guides to do so. This
+// macro is used to mark them as such, which suppresses the
+// '-Wctad-maybe-unsupported' compiler warning when CTAD is used in user code
+// with these classes.
+#if _LIBCPP_STD_VER >= 17
+#    define _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(_ClassName)                                                                \
+      template <class ..._Tag>                                                                                         \
+      _ClassName(typename _Tag::__allow_ctad...) -> _ClassName<_Tag...>
 #else
-#define _LIBCPP_FORMAT_PRINTF(a, b)
+#  define _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(_ClassName) static_assert(true, "")
 #endif
 
+// TODO(varconst): currently, there are bugs in Clang's intrinsics when handling Objective-C++ `id`, so don't use
+// compiler intrinsics in the Objective-C++ mode.
+#  ifdef __OBJC__
+#    define _LIBCPP_WORKAROUND_OBJCXX_COMPILER_INTRINSICS
+#  endif
+
 #endif // __cplusplus
 
-#endif // _LIBCPP_CONFIG
+#endif // _LIBCPP___CONFIG
diff --git a/gnu/llvm/libcxx/include/__function_like.h b/gnu/llvm/libcxx/include/__function_like.h
deleted file mode 100644
index 8a3597bacdc..00000000000
--- a/gnu/llvm/libcxx/include/__function_like.h
+++ /dev/null
@@ -1,56 +0,0 @@
-// -*- C++ -*-
-//===----------------------------------------------------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef _LIBCPP___ITERATOR_FUNCTION_LIKE_H
-#define _LIBCPP___ITERATOR_FUNCTION_LIKE_H
-
-#include <__config>
-
-#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
-#endif
-
-_LIBCPP_PUSH_MACROS
-#include <__undef_macros>
-
-_LIBCPP_BEGIN_NAMESPACE_STD
-
-#if !defined(_LIBCPP_HAS_NO_RANGES)
-
-namespace ranges {
-// Per [range.iter.ops.general] and [algorithms.requirements], functions in namespace std::ranges
-// can't be found by ADL and inhibit ADL when found by unqualified lookup. The easiest way to
-// facilitate this is to use function objects.
-//
-// Since these are still standard library functions, we use `__function_like` to eliminate most of
-// the properties that function objects get by default (e.g. semiregularity, addressability), to
-// limit the surface area of the unintended public interface, so as to curb the effect of Hyrum's
-// law.
-struct __function_like {
-  __function_like() = delete;
-  __function_like(__function_like const&) = delete;
-  __function_like& operator=(__function_like const&) = delete;
-
-  void operator&() const = delete;
-
-  struct __tag { };
-
-protected:
-  constexpr explicit __function_like(__tag) noexcept {}
-  ~__function_like() = default;
-};
-} // namespace ranges
-
-#endif // !defined(_LIBCPP_HAS_NO_RANGES)
-
-_LIBCPP_END_NAMESPACE_STD
-
-_LIBCPP_POP_MACROS
-
-#endif // _LIBCPP___ITERATOR_FUNCTION_LIKE_H
diff --git a/gnu/llvm/libcxx/include/__functional_base b/gnu/llvm/libcxx/include/__functional_base
deleted file mode 100644
index ca761c409b6..00000000000
--- a/gnu/llvm/libcxx/include/__functional_base
+++ /dev/null
@@ -1,652 +0,0 @@
-// -*- C++ -*-
-//===----------------------------------------------------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef _LIBCPP_FUNCTIONAL_BASE
-#define _LIBCPP_FUNCTIONAL_BASE
-
-#include <__config>
-#include <type_traits>
-#include <typeinfo>
-#include <exception>
-#include <new>
-#include <utility>
-
-#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
-#endif
-
-_LIBCPP_BEGIN_NAMESPACE_STD
-
-template <class _Arg1, class _Arg2, class _Result>
-struct _LIBCPP_TEMPLATE_VIS binary_function
-{
-    typedef _Arg1   first_argument_type;
-    typedef _Arg2   second_argument_type;
-    typedef _Result result_type;
-};
-
-template <class _Tp>
-struct __has_result_type
-{
-private:
-    struct __two {char __lx; char __lxx;};
-    template <class _Up> static __two __test(...);
-    template <class _Up> static char __test(typename _Up::result_type* = 0);
-public:
-    static const bool value = sizeof(__test<_Tp>(0)) == 1;
-};
-
-#if _LIBCPP_STD_VER > 11
-template <class _Tp = void>
-#else
-template <class _Tp>
-#endif
-struct _LIBCPP_TEMPLATE_VIS less : binary_function<_Tp, _Tp, bool>
-{
-    _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-    bool operator()(const _Tp& __x, const _Tp& __y) const
-        {return __x < __y;}
-};
-
-#if _LIBCPP_STD_VER > 11
-template <>
-struct _LIBCPP_TEMPLATE_VIS less<void>
-{
-    template <class _T1, class _T2>
-    _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-    auto operator()(_T1&& __t, _T2&& __u) const
-    _NOEXCEPT_(noexcept(_VSTD::forward<_T1>(__t) < _VSTD::forward<_T2>(__u)))
-    -> decltype        (_VSTD::forward<_T1>(__t) < _VSTD::forward<_T2>(__u))
-        { return        _VSTD::forward<_T1>(__t) < _VSTD::forward<_T2>(__u); }
-    typedef void is_transparent;
-};
-#endif
-
-// __weak_result_type
-
-template <class _Tp>
-struct __derives_from_unary_function
-{
-private:
-    struct __two {char __lx; char __lxx;};
-    static __two __test(...);
-    template <class _Ap, class _Rp>
-        static unary_function<_Ap, _Rp>
-        __test(const volatile unary_function<_Ap, _Rp>*);
-public:
-    static const bool value = !is_same<decltype(__test((_Tp*)0)), __two>::value;
-    typedef decltype(__test((_Tp*)0)) type;
-};
-
-template <class _Tp>
-struct __derives_from_binary_function
-{
-private:
-    struct __two {char __lx; char __lxx;};
-    static __two __test(...);
-    template <class _A1, class _A2, class _Rp>
-        static binary_function<_A1, _A2, _Rp>
-        __test(const volatile binary_function<_A1, _A2, _Rp>*);
-public:
-    static const bool value = !is_same<decltype(__test((_Tp*)0)), __two>::value;
-    typedef decltype(__test((_Tp*)0)) type;
-};
-
-template <class _Tp, bool = __derives_from_unary_function<_Tp>::value>
-struct __maybe_derive_from_unary_function  // bool is true
-    : public __derives_from_unary_function<_Tp>::type
-{
-};
-
-template <class _Tp>
-struct __maybe_derive_from_unary_function<_Tp, false>
-{
-};
-
-template <class _Tp, bool = __derives_from_binary_function<_Tp>::value>
-struct __maybe_derive_from_binary_function  // bool is true
-    : public __derives_from_binary_function<_Tp>::type
-{
-};
-
-template <class _Tp>
-struct __maybe_derive_from_binary_function<_Tp, false>
-{
-};
-
-template <class _Tp, bool = __has_result_type<_Tp>::value>
-struct __weak_result_type_imp // bool is true
-    : public __maybe_derive_from_unary_function<_Tp>,
-      public __maybe_derive_from_binary_function<_Tp>
-{
-    typedef _LIBCPP_NODEBUG_TYPE typename _Tp::result_type result_type;
-};
-
-template <class _Tp>
-struct __weak_result_type_imp<_Tp, false>
-    : public __maybe_derive_from_unary_function<_Tp>,
-      public __maybe_derive_from_binary_function<_Tp>
-{
-};
-
-template <class _Tp>
-struct __weak_result_type
-    : public __weak_result_type_imp<_Tp>
-{
-};
-
-// 0 argument case
-
-template <class _Rp>
-struct __weak_result_type<_Rp ()>
-{
-    typedef _LIBCPP_NODEBUG_TYPE  _Rp result_type;
-};
-
-template <class _Rp>
-struct __weak_result_type<_Rp (&)()>
-{
-    typedef _LIBCPP_NODEBUG_TYPE  _Rp result_type;
-};
-
-template <class _Rp>
-struct __weak_result_type<_Rp (*)()>
-{
-    typedef _LIBCPP_NODEBUG_TYPE  _Rp result_type;
-};
-
-// 1 argument case
-
-template <class _Rp, class _A1>
-struct __weak_result_type<_Rp (_A1)>
-    : public unary_function<_A1, _Rp>
-{
-};
-
-template <class _Rp, class _A1>
-struct __weak_result_type<_Rp (&)(_A1)>
-    : public unary_function<_A1, _Rp>
-{
-};
-
-template <class _Rp, class _A1>
-struct __weak_result_type<_Rp (*)(_A1)>
-    : public unary_function<_A1, _Rp>
-{
-};
-
-template <class _Rp, class _Cp>
-struct __weak_result_type<_Rp (_Cp::*)()>
-    : public unary_function<_Cp*, _Rp>
-{
-};
-
-template <class _Rp, class _Cp>
-struct __weak_result_type<_Rp (_Cp::*)() const>
-    : public unary_function<const _Cp*, _Rp>
-{
-};
-
-template <class _Rp, class _Cp>
-struct __weak_result_type<_Rp (_Cp::*)() volatile>
-    : public unary_function<volatile _Cp*, _Rp>
-{
-};
-
-template <class _Rp, class _Cp>
-struct __weak_result_type<_Rp (_Cp::*)() const volatile>
-    : public unary_function<const volatile _Cp*, _Rp>
-{
-};
-
-// 2 argument case
-
-template <class _Rp, class _A1, class _A2>
-struct __weak_result_type<_Rp (_A1, _A2)>
-    : public binary_function<_A1, _A2, _Rp>
-{
-};
-
-template <class _Rp, class _A1, class _A2>
-struct __weak_result_type<_Rp (*)(_A1, _A2)>
-    : public binary_function<_A1, _A2, _Rp>
-{
-};
-
-template <class _Rp, class _A1, class _A2>
-struct __weak_result_type<_Rp (&)(_A1, _A2)>
-    : public binary_function<_A1, _A2, _Rp>
-{
-};
-
-template <class _Rp, class _Cp, class _A1>
-struct __weak_result_type<_Rp (_Cp::*)(_A1)>
-    : public binary_function<_Cp*, _A1, _Rp>
-{
-};
-
-template <class _Rp, class _Cp, class _A1>
-struct __weak_result_type<_Rp (_Cp::*)(_A1) const>
-    : public binary_function<const _Cp*, _A1, _Rp>
-{
-};
-
-template <class _Rp, class _Cp, class _A1>
-struct __weak_result_type<_Rp (_Cp::*)(_A1) volatile>
-    : public binary_function<volatile _Cp*, _A1, _Rp>
-{
-};
-
-template <class _Rp, class _Cp, class _A1>
-struct __weak_result_type<_Rp (_Cp::*)(_A1) const volatile>
-    : public binary_function<const volatile _Cp*, _A1, _Rp>
-{
-};
-
-
-#ifndef _LIBCPP_CXX03_LANG
-// 3 or more arguments
-
-template <class _Rp, class _A1, class _A2, class _A3, class ..._A4>
-struct __weak_result_type<_Rp (_A1, _A2, _A3, _A4...)>
-{
-    typedef _Rp result_type;
-};
-
-template <class _Rp, class _A1, class _A2, class _A3, class ..._A4>
-struct __weak_result_type<_Rp (&)(_A1, _A2, _A3, _A4...)>
-{
-    typedef _Rp result_type;
-};
-
-template <class _Rp, class _A1, class _A2, class _A3, class ..._A4>
-struct __weak_result_type<_Rp (*)(_A1, _A2, _A3, _A4...)>
-{
-    typedef _Rp result_type;
-};
-
-template <class _Rp, class _Cp, class _A1, class _A2, class ..._A3>
-struct __weak_result_type<_Rp (_Cp::*)(_A1, _A2, _A3...)>
-{
-    typedef _Rp result_type;
-};
-
-template <class _Rp, class _Cp, class _A1, class _A2, class ..._A3>
-struct __weak_result_type<_Rp (_Cp::*)(_A1, _A2, _A3...) const>
-{
-    typedef _Rp result_type;
-};
-
-template <class _Rp, class _Cp, class _A1, class _A2, class ..._A3>
-struct __weak_result_type<_Rp (_Cp::*)(_A1, _A2, _A3...) volatile>
-{
-    typedef _Rp result_type;
-};
-
-template <class _Rp, class _Cp, class _A1, class _A2, class ..._A3>
-struct __weak_result_type<_Rp (_Cp::*)(_A1, _A2, _A3...) const volatile>
-{
-    typedef _Rp result_type;
-};
-
-template <class _Tp, class ..._Args>
-struct __invoke_return
-{
-    typedef decltype(__invoke(_VSTD::declval<_Tp>(), _VSTD::declval<_Args>()...)) type;
-};
-
-#else // defined(_LIBCPP_CXX03_LANG)
-
-#include <__functional_base_03>
-
-#endif  // !defined(_LIBCPP_CXX03_LANG)
-
-
-template <class _Ret>
-struct __invoke_void_return_wrapper
-{
-#ifndef _LIBCPP_CXX03_LANG
-    template <class ..._Args>
-    static _Ret __call(_Args&&... __args) {
-        return __invoke(_VSTD::forward<_Args>(__args)...);
-    }
-#else
-    template <class _Fn>
-    static _Ret __call(_Fn __f) {
-        return __invoke(__f);
-    }
-
-    template <class _Fn, class _A0>
-    static _Ret __call(_Fn __f, _A0& __a0) {
-        return __invoke(__f, __a0);
-    }
-
-    template <class _Fn, class _A0, class _A1>
-    static _Ret __call(_Fn __f, _A0& __a0, _A1& __a1) {
-        return __invoke(__f, __a0, __a1);
-    }
-
-    template <class _Fn, class _A0, class _A1, class _A2>
-    static _Ret __call(_Fn __f, _A0& __a0, _A1& __a1, _A2& __a2){
-        return __invoke(__f, __a0, __a1, __a2);
-    }
-#endif
-};
-
-template <>
-struct __invoke_void_return_wrapper<void>
-{
-#ifndef _LIBCPP_CXX03_LANG
-    template <class ..._Args>
-    static void __call(_Args&&... __args) {
-        __invoke(_VSTD::forward<_Args>(__args)...);
-    }
-#else
-    template <class _Fn>
-    static void __call(_Fn __f) {
-        __invoke(__f);
-    }
-
-    template <class _Fn, class _A0>
-    static void __call(_Fn __f, _A0& __a0) {
-        __invoke(__f, __a0);
-    }
-
-    template <class _Fn, class _A0, class _A1>
-    static void __call(_Fn __f, _A0& __a0, _A1& __a1) {
-        __invoke(__f, __a0, __a1);
-    }
-
-    template <class _Fn, class _A0, class _A1, class _A2>
-    static void __call(_Fn __f, _A0& __a0, _A1& __a1, _A2& __a2) {
-        __invoke(__f, __a0, __a1, __a2);
-    }
-#endif
-};
-
-template <class _Tp>
-class _LIBCPP_TEMPLATE_VIS reference_wrapper
-    : public __weak_result_type<_Tp>
-{
-public:
-    // types
-    typedef _Tp type;
-private:
-    type* __f_;
-
-public:
-    // construct/copy/destroy
-    _LIBCPP_INLINE_VISIBILITY reference_wrapper(type& __f) _NOEXCEPT
-        : __f_(_VSTD::addressof(__f)) {}
-#ifndef _LIBCPP_CXX03_LANG
-    private: reference_wrapper(type&&); public: // = delete; // do not bind to temps
-#endif
-
-    // access
-    _LIBCPP_INLINE_VISIBILITY operator type&    () const _NOEXCEPT {return *__f_;}
-    _LIBCPP_INLINE_VISIBILITY          type& get() const _NOEXCEPT {return *__f_;}
-
-#ifndef _LIBCPP_CXX03_LANG
-    // invoke
-    template <class... _ArgTypes>
-    _LIBCPP_INLINE_VISIBILITY
-    typename __invoke_of<type&, _ArgTypes...>::type
-    operator() (_ArgTypes&&... __args) const {
-        return __invoke(get(), _VSTD::forward<_ArgTypes>(__args)...);
-    }
-#else
-
-    _LIBCPP_INLINE_VISIBILITY
-    typename __invoke_return<type>::type
-    operator() () const {
-        return __invoke(get());
-    }
-
-    template <class _A0>
-    _LIBCPP_INLINE_VISIBILITY
-    typename __invoke_return0<type, _A0>::type
-    operator() (_A0& __a0) const {
-        return __invoke(get(), __a0);
-    }
-
-    template <class _A0>
-    _LIBCPP_INLINE_VISIBILITY
-    typename __invoke_return0<type, _A0 const>::type
-    operator() (_A0 const& __a0) const {
-        return __invoke(get(), __a0);
-    }
-
-    template <class _A0, class _A1>
-    _LIBCPP_INLINE_VISIBILITY
-    typename __invoke_return1<type, _A0, _A1>::type
-    operator() (_A0& __a0, _A1& __a1) const {
-        return __invoke(get(), __a0, __a1);
-    }
-
-    template <class _A0, class _A1>
-    _LIBCPP_INLINE_VISIBILITY
-    typename __invoke_return1<type, _A0 const, _A1>::type
-    operator() (_A0 const& __a0, _A1& __a1) const {
-        return __invoke(get(), __a0, __a1);
-    }
-
-    template <class _A0, class _A1>
-    _LIBCPP_INLINE_VISIBILITY
-    typename __invoke_return1<type, _A0, _A1 const>::type
-    operator() (_A0& __a0, _A1 const& __a1) const {
-        return __invoke(get(), __a0, __a1);
-    }
-
-    template <class _A0, class _A1>
-    _LIBCPP_INLINE_VISIBILITY
-    typename __invoke_return1<type, _A0 const, _A1 const>::type
-    operator() (_A0 const& __a0, _A1 const& __a1) const {
-        return __invoke(get(), __a0, __a1);
-    }
-
-    template <class _A0, class _A1, class _A2>
-    _LIBCPP_INLINE_VISIBILITY
-    typename __invoke_return2<type, _A0, _A1, _A2>::type
-    operator() (_A0& __a0, _A1& __a1, _A2& __a2) const {
-        return __invoke(get(), __a0, __a1, __a2);
-    }
-
-    template <class _A0, class _A1, class _A2>
-    _LIBCPP_INLINE_VISIBILITY
-    typename __invoke_return2<type, _A0 const, _A1, _A2>::type
-    operator() (_A0 const& __a0, _A1& __a1, _A2& __a2) const {
-        return __invoke(get(), __a0, __a1, __a2);
-    }
-
-    template <class _A0, class _A1, class _A2>
-    _LIBCPP_INLINE_VISIBILITY
-    typename __invoke_return2<type, _A0, _A1 const, _A2>::type
-    operator() (_A0& __a0, _A1 const& __a1, _A2& __a2) const {
-        return __invoke(get(), __a0, __a1, __a2);
-    }
-
-    template <class _A0, class _A1, class _A2>
-    _LIBCPP_INLINE_VISIBILITY
-    typename __invoke_return2<type, _A0, _A1, _A2 const>::type
-    operator() (_A0& __a0, _A1& __a1, _A2 const& __a2) const {
-        return __invoke(get(), __a0, __a1, __a2);
-    }
-
-    template <class _A0, class _A1, class _A2>
-    _LIBCPP_INLINE_VISIBILITY
-    typename __invoke_return2<type, _A0 const, _A1 const, _A2>::type
-    operator() (_A0 const& __a0, _A1 const& __a1, _A2& __a2) const {
-        return __invoke(get(), __a0, __a1, __a2);
-    }
-
-    template <class _A0, class _A1, class _A2>
-    _LIBCPP_INLINE_VISIBILITY
-    typename __invoke_return2<type, _A0 const, _A1, _A2 const>::type
-    operator() (_A0 const& __a0, _A1& __a1, _A2 const& __a2) const {
-        return __invoke(get(), __a0, __a1, __a2);
-    }
-
-    template <class _A0, class _A1, class _A2>
-    _LIBCPP_INLINE_VISIBILITY
-    typename __invoke_return2<type, _A0, _A1 const, _A2 const>::type
-    operator() (_A0& __a0, _A1 const& __a1, _A2 const& __a2) const {
-        return __invoke(get(), __a0, __a1, __a2);
-    }
-
-    template <class _A0, class _A1, class _A2>
-    _LIBCPP_INLINE_VISIBILITY
-    typename __invoke_return2<type, _A0 const, _A1 const, _A2 const>::type
-    operator() (_A0 const& __a0, _A1 const& __a1, _A2 const& __a2) const {
-        return __invoke(get(), __a0, __a1, __a2);
-    }
-#endif // _LIBCPP_CXX03_LANG
-};
-
-
-template <class _Tp>
-inline _LIBCPP_INLINE_VISIBILITY
-reference_wrapper<_Tp>
-ref(_Tp& __t) _NOEXCEPT
-{
-    return reference_wrapper<_Tp>(__t);
-}
-
-template <class _Tp>
-inline _LIBCPP_INLINE_VISIBILITY
-reference_wrapper<_Tp>
-ref(reference_wrapper<_Tp> __t) _NOEXCEPT
-{
-    return ref(__t.get());
-}
-
-template <class _Tp>
-inline _LIBCPP_INLINE_VISIBILITY
-reference_wrapper<const _Tp>
-cref(const _Tp& __t) _NOEXCEPT
-{
-    return reference_wrapper<const _Tp>(__t);
-}
-
-template <class _Tp>
-inline _LIBCPP_INLINE_VISIBILITY
-reference_wrapper<const _Tp>
-cref(reference_wrapper<_Tp> __t) _NOEXCEPT
-{
-    return cref(__t.get());
-}
-
-#ifndef _LIBCPP_CXX03_LANG
-template <class _Tp> void ref(const _Tp&&) = delete;
-template <class _Tp> void cref(const _Tp&&) = delete;
-#endif
-
-#if _LIBCPP_STD_VER > 11
-template <class _Tp, class, class = void>
-struct __is_transparent : false_type {};
-
-template <class _Tp, class _Up>
-struct __is_transparent<_Tp, _Up,
-                        typename __void_t<typename _Tp::is_transparent>::type>
-   : true_type {};
-#endif
-
-// allocator_arg_t
-
-struct _LIBCPP_TEMPLATE_VIS allocator_arg_t { explicit allocator_arg_t() = default; };
-
-#if defined(_LIBCPP_CXX03_LANG) || defined(_LIBCPP_BUILDING_LIBRARY)
-extern _LIBCPP_EXPORTED_FROM_ABI const allocator_arg_t allocator_arg;
-#else
-/* _LIBCPP_INLINE_VAR */ constexpr allocator_arg_t allocator_arg = allocator_arg_t();
-#endif
-
-// uses_allocator
-
-template <class _Tp>
-struct __has_allocator_type
-{
-private:
-    struct __two {char __lx; char __lxx;};
-    template <class _Up> static __two __test(...);
-    template <class _Up> static char __test(typename _Up::allocator_type* = 0);
-public:
-    static const bool value = sizeof(__test<_Tp>(0)) == 1;
-};
-
-template <class _Tp, class _Alloc, bool = __has_allocator_type<_Tp>::value>
-struct __uses_allocator
-    : public integral_constant<bool,
-        is_convertible<_Alloc, typename _Tp::allocator_type>::value>
-{
-};
-
-template <class _Tp, class _Alloc>
-struct __uses_allocator<_Tp, _Alloc, false>
-    : public false_type
-{
-};
-
-template <class _Tp, class _Alloc>
-struct _LIBCPP_TEMPLATE_VIS uses_allocator
-    : public __uses_allocator<_Tp, _Alloc>
-{
-};
-
-#if _LIBCPP_STD_VER > 14
-template <class _Tp, class _Alloc>
-_LIBCPP_INLINE_VAR constexpr size_t uses_allocator_v = uses_allocator<_Tp, _Alloc>::value;
-#endif
-
-#ifndef _LIBCPP_CXX03_LANG
-
-// allocator construction
-
-template <class _Tp, class _Alloc, class ..._Args>
-struct __uses_alloc_ctor_imp
-{
-    typedef _LIBCPP_NODEBUG_TYPE typename __uncvref<_Alloc>::type _RawAlloc;
-    static const bool __ua = uses_allocator<_Tp, _RawAlloc>::value;
-    static const bool __ic =
-        is_constructible<_Tp, allocator_arg_t, _Alloc, _Args...>::value;
-    static const int value = __ua ? 2 - __ic : 0;
-};
-
-template <class _Tp, class _Alloc, class ..._Args>
-struct __uses_alloc_ctor
-    : integral_constant<int, __uses_alloc_ctor_imp<_Tp, _Alloc, _Args...>::value>
-    {};
-
-template <class _Tp, class _Allocator, class... _Args>
-inline _LIBCPP_INLINE_VISIBILITY
-void __user_alloc_construct_impl (integral_constant<int, 0>, _Tp *__storage, const _Allocator &, _Args &&... __args )
-{
-    new (__storage) _Tp (_VSTD::forward<_Args>(__args)...);
-}
-
-// FIXME: This should have a version which takes a non-const alloc.
-template <class _Tp, class _Allocator, class... _Args>
-inline _LIBCPP_INLINE_VISIBILITY
-void __user_alloc_construct_impl (integral_constant<int, 1>, _Tp *__storage, const _Allocator &__a, _Args &&... __args )
-{
-    new (__storage) _Tp (allocator_arg, __a, _VSTD::forward<_Args>(__args)...);
-}
-
-// FIXME: This should have a version which takes a non-const alloc.
-template <class _Tp, class _Allocator, class... _Args>
-inline _LIBCPP_INLINE_VISIBILITY
-void __user_alloc_construct_impl (integral_constant<int, 2>, _Tp *__storage, const _Allocator &__a, _Args &&... __args )
-{
-    new (__storage) _Tp (_VSTD::forward<_Args>(__args)..., __a);
-}
-
-#endif  // _LIBCPP_CXX03_LANG
-
-_LIBCPP_END_NAMESPACE_STD
-
-#endif  // _LIBCPP_FUNCTIONAL_BASE
diff --git a/gnu/llvm/libcxx/include/__libcpp_version b/gnu/llvm/libcxx/include/__libcpp_version
deleted file mode 100644
index 5caff40c4a0..00000000000
--- a/gnu/llvm/libcxx/include/__libcpp_version
+++ /dev/null
@@ -1 +0,0 @@
-10000
diff --git a/gnu/llvm/libcxx/include/__locale b/gnu/llvm/libcxx/include/__locale
index ad742997d9a..e0ffa0ca00f 100644
--- a/gnu/llvm/libcxx/include/__locale
+++ b/gnu/llvm/libcxx/include/__locale
@@ -12,31 +12,30 @@
 
 #include <__availability>
 #include <__config>
-#include <string>
-#include <memory>
-#include <utility>
-#include <mutex>
-#include <cstdint>
 #include <cctype>
+#include <cstdint>
 #include <locale.h>
+#include <mutex>
+#include <string>
+
+// Some platforms require more includes than others. Keep the includes on all plaforms for now.
+#include <cstddef>
+#include <cstring>
+
 #if defined(_LIBCPP_MSVCRT_LIKE)
-# include <cstring>
 # include <__support/win32/locale_win32.h>
-#elif defined(__NuttX__)
-# include <__support/nuttx/xlocale.h>
 #elif defined(_AIX) || defined(__MVS__)
 # include <__support/ibm/xlocale.h>
 #elif defined(__ANDROID__)
 # include <__support/android/locale_bionic.h>
 #elif defined(__sun__)
-# include <xlocale.h>
 # include <__support/solaris/xlocale.h>
+# include <xlocale.h>
 #elif defined(_NEWLIB_VERSION)
 # include <__support/newlib/xlocale.h>
 #elif defined(__OpenBSD__)
 # include <__support/openbsd/xlocale.h>
-#elif (defined(__APPLE__)      || defined(__FreeBSD__) \
-    || defined(__EMSCRIPTEN__) || defined(__IBMCPP__))
+#elif (defined(__APPLE__) || defined(__FreeBSD__))
 # include <xlocale.h>
 #elif defined(__Fuchsia__)
 # include <__support/fuchsia/xlocale.h>
@@ -48,7 +47,7 @@
 #endif
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
+#  pragma GCC system_header
 #endif
 
 _LIBCPP_BEGIN_NAMESPACE_STD
@@ -194,12 +193,12 @@ protected:
     explicit facet(size_t __refs = 0)
         : __shared_count(static_cast<long>(__refs)-1) {}
 
-    virtual ~facet();
+    ~facet() override;
 
 //    facet(const facet&) = delete;     // effectively done in __shared_count
 //    void operator=(const facet&) = delete;
 private:
-    virtual void __on_zero_shared() _NOEXCEPT;
+    void __on_zero_shared() _NOEXCEPT override;
 };
 
 class _LIBCPP_TYPE_VIS locale::id
@@ -210,10 +209,11 @@ class _LIBCPP_TYPE_VIS locale::id
     static int32_t __next_id;
 public:
     _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR id() :__id_(0) {}
+    void operator=(const id&) = delete;
+    id(const id&) = delete;
+
 private:
     void __init();
-    void operator=(const id&); // = delete;
-    id(const id&); // = delete;
 public:  // only needed for tests
     long __get();
 
@@ -293,7 +293,7 @@ public:
     static locale::id id;
 
 protected:
-    ~collate();
+    ~collate() override;
     virtual int do_compare(const char_type* __lo1, const char_type* __hi1,
                            const char_type* __lo2, const char_type* __hi2) const;
     virtual string_type do_transform(const char_type* __lo, const char_type* __hi) const
@@ -339,8 +339,10 @@ collate<_CharT>::do_hash(const char_type* __lo, const char_type* __hi) const
     return static_cast<long>(__h);
 }
 
-_LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS collate<char>)
-_LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS collate<wchar_t>)
+extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS collate<char>;
+#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
+extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS collate<wchar_t>;
+#endif
 
 // template <class CharT> class collate_byname;
 
@@ -350,7 +352,7 @@ template <>
 class _LIBCPP_TYPE_VIS collate_byname<char>
     : public collate<char>
 {
-    locale_t __l;
+    locale_t __l_;
 public:
     typedef char char_type;
     typedef basic_string<char_type> string_type;
@@ -359,17 +361,18 @@ public:
     explicit collate_byname(const string& __n, size_t __refs = 0);
 
 protected:
-    ~collate_byname();
-    virtual int do_compare(const char_type* __lo1, const char_type* __hi1,
-                           const char_type* __lo2, const char_type* __hi2) const;
-    virtual string_type do_transform(const char_type* __lo, const char_type* __hi) const;
+    ~collate_byname() override;
+    int do_compare(const char_type* __lo1, const char_type* __hi1,
+                   const char_type* __lo2, const char_type* __hi2) const override;
+    string_type do_transform(const char_type* __lo, const char_type* __hi) const override;
 };
 
+#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
 template <>
 class _LIBCPP_TYPE_VIS collate_byname<wchar_t>
     : public collate<wchar_t>
 {
-    locale_t __l;
+    locale_t __l_;
 public:
     typedef wchar_t char_type;
     typedef basic_string<char_type> string_type;
@@ -378,12 +381,13 @@ public:
     explicit collate_byname(const string& __n, size_t __refs = 0);
 
 protected:
-    ~collate_byname();
+    ~collate_byname() override;
 
-    virtual int do_compare(const char_type* __lo1, const char_type* __hi1,
-                           const char_type* __lo2, const char_type* __hi2) const;
-    virtual string_type do_transform(const char_type* __lo, const char_type* __hi) const;
+    int do_compare(const char_type* __lo1, const char_type* __hi1,
+                   const char_type* __lo2, const char_type* __hi2) const override;
+    string_type do_transform(const char_type* __lo, const char_type* __hi) const override;
 };
+#endif
 
 template <class _CharT, class _Traits, class _Allocator>
 bool
@@ -448,8 +452,9 @@ public:
     static const mask punct  = _PUNCT;
     static const mask xdigit = _HEX;
     static const mask blank  = _BLANK;
-    static const mask __regex_word = 0x80;
+    static const mask __regex_word = 0x4000; // 0x8000 and 0x0100 and 0x00ff are used
 # define _LIBCPP_CTYPE_MASK_IS_COMPOSITE_PRINT
+# define _LIBCPP_CTYPE_MASK_IS_COMPOSITE_ALPHA
 #elif defined(__APPLE__) || defined(__FreeBSD__) || defined(__EMSCRIPTEN__) || defined(__NetBSD__)
 # ifdef __APPLE__
     typedef __uint32_t mask;
@@ -489,7 +494,11 @@ public:
     static const mask punct  = _ISPUNCT;
     static const mask xdigit = _ISXDIGIT;
     static const mask blank  = _ISBLANK;
+# if defined(_AIX)
+    static const mask __regex_word = 0x8000;
+# else
     static const mask __regex_word = 0x80;
+# endif
 #elif defined(_NEWLIB_VERSION)
     // Same type as Newlib's _ctype_ array in newlib/libc/include/ctype.h.
     typedef char mask;
@@ -503,10 +512,38 @@ public:
     static const mask punct  = _P;
     static const mask xdigit = _X | _N;
     static const mask blank  = _B;
-    static const mask __regex_word = 0x80;
+    // mask is already fully saturated, use a different type in regex_type_traits.
+    static const unsigned short __regex_word = 0x100;
 # define _LIBCPP_CTYPE_MASK_IS_COMPOSITE_PRINT
 # define _LIBCPP_CTYPE_MASK_IS_COMPOSITE_ALPHA
 # define _LIBCPP_CTYPE_MASK_IS_COMPOSITE_XDIGIT
+#elif defined(__MVS__)
+# if defined(__NATIVE_ASCII_F)
+    typedef unsigned int mask;
+    static const mask space  = _ISSPACE_A;
+    static const mask print  = _ISPRINT_A;
+    static const mask cntrl  = _ISCNTRL_A;
+    static const mask upper  = _ISUPPER_A;
+    static const mask lower  = _ISLOWER_A;
+    static const mask alpha  = _ISALPHA_A;
+    static const mask digit  = _ISDIGIT_A;
+    static const mask punct  = _ISPUNCT_A;
+    static const mask xdigit = _ISXDIGIT_A;
+    static const mask blank  = _ISBLANK_A;
+# else
+    typedef unsigned short mask;
+    static const mask space  = __ISSPACE;
+    static const mask print  = __ISPRINT;
+    static const mask cntrl  = __ISCNTRL;
+    static const mask upper  = __ISUPPER;
+    static const mask lower  = __ISLOWER;
+    static const mask alpha  = __ISALPHA;
+    static const mask digit  = __ISDIGIT;
+    static const mask punct  = __ISPUNCT;
+    static const mask xdigit = __ISXDIGIT;
+    static const mask blank  = __ISBLANK;
+# endif
+    static const mask __regex_word = 0x8000;
 #else
 # error unknown rune table for this platform -- do you mean to define _LIBCPP_PROVIDES_DEFAULT_RUNE_TABLE?
 #endif
@@ -514,10 +551,15 @@ public:
     static const mask graph  = alnum | punct;
 
     _LIBCPP_INLINE_VISIBILITY ctype_base() {}
+
+    static_assert((__regex_word & ~(std::make_unsigned<mask>::type)(space | print | cntrl | upper | lower | alpha |
+                                                                    digit | punct | xdigit | blank)) == __regex_word,
+                  "__regex_word can't overlap other bits");
 };
 
 template <class _CharT> class _LIBCPP_TEMPLATE_VIS ctype;
 
+#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
 template <>
 class _LIBCPP_TYPE_VIS ctype<wchar_t>
     : public locale::facet,
@@ -605,7 +647,7 @@ public:
     static locale::id id;
 
 protected:
-    ~ctype();
+    ~ctype() override;
     virtual bool do_is(mask __m, char_type __c) const;
     virtual const char_type* do_is(const char_type* __low, const char_type* __high, mask* __vec) const;
     virtual const char_type* do_scan_is(mask __m, const char_type* __low, const char_type* __high) const;
@@ -619,6 +661,7 @@ protected:
     virtual char do_narrow(char_type, char __dfault) const;
     virtual const char_type* do_narrow(const char_type* __low, const char_type* __high, char __dfault, char* __dest) const;
 };
+#endif // _LIBCPP_HAS_NO_WIDE_CHARACTERS
 
 template <>
 class _LIBCPP_TYPE_VIS ctype<char>
@@ -658,7 +701,7 @@ public:
     const char_type* scan_not(mask __m, const char_type* __low, const char_type* __high) const
     {
         for (; __low != __high; ++__low)
-            if (!(isascii(*__low) && (__tab_[static_cast<int>(*__low)] & __m)))
+            if (!isascii(*__low) || !(__tab_[static_cast<int>(*__low)] & __m))
                 break;
         return __low;
     }
@@ -728,9 +771,13 @@ public:
     static const short* __classic_upper_table() _NOEXCEPT;
     static const short* __classic_lower_table() _NOEXCEPT;
 #endif
+#if defined(__MVS__)
+    static const unsigned short* __classic_upper_table() _NOEXCEPT;
+    static const unsigned short* __classic_lower_table() _NOEXCEPT;
+#endif
 
 protected:
-    ~ctype();
+    ~ctype() override;
     virtual char_type do_toupper(char_type __c) const;
     virtual const char_type* do_toupper(char_type* __low, const char_type* __high) const;
     virtual char_type do_tolower(char_type __c) const;
@@ -749,52 +796,54 @@ template <>
 class _LIBCPP_TYPE_VIS ctype_byname<char>
     : public ctype<char>
 {
-    locale_t __l;
+    locale_t __l_;
 
 public:
     explicit ctype_byname(const char*, size_t = 0);
     explicit ctype_byname(const string&, size_t = 0);
 
 protected:
-    ~ctype_byname();
-    virtual char_type do_toupper(char_type) const;
-    virtual const char_type* do_toupper(char_type* __low, const char_type* __high) const;
-    virtual char_type do_tolower(char_type) const;
-    virtual const char_type* do_tolower(char_type* __low, const char_type* __high) const;
+    ~ctype_byname() override;
+    char_type do_toupper(char_type) const override;
+    const char_type* do_toupper(char_type* __low, const char_type* __high) const override;
+    char_type do_tolower(char_type) const override;
+    const char_type* do_tolower(char_type* __low, const char_type* __high) const override;
 };
 
+#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
 template <>
 class _LIBCPP_TYPE_VIS ctype_byname<wchar_t>
     : public ctype<wchar_t>
 {
-    locale_t __l;
+    locale_t __l_;
 
 public:
     explicit ctype_byname(const char*, size_t = 0);
     explicit ctype_byname(const string&, size_t = 0);
 
 protected:
-    ~ctype_byname();
-    virtual bool do_is(mask __m, char_type __c) const;
-    virtual const char_type* do_is(const char_type* __low, const char_type* __high, mask* __vec) const;
-    virtual const char_type* do_scan_is(mask __m, const char_type* __low, const char_type* __high) const;
-    virtual const char_type* do_scan_not(mask __m, const char_type* __low, const char_type* __high) const;
-    virtual char_type do_toupper(char_type) const;
-    virtual const char_type* do_toupper(char_type* __low, const char_type* __high) const;
-    virtual char_type do_tolower(char_type) const;
-    virtual const char_type* do_tolower(char_type* __low, const char_type* __high) const;
-    virtual char_type do_widen(char) const;
-    virtual const char* do_widen(const char* __low, const char* __high, char_type* __dest) const;
-    virtual char do_narrow(char_type, char __dfault) const;
-    virtual const char_type* do_narrow(const char_type* __low, const char_type* __high, char __dfault, char* __dest) const;
+    ~ctype_byname() override;
+    bool do_is(mask __m, char_type __c) const override;
+    const char_type* do_is(const char_type* __low, const char_type* __high, mask* __vec) const override;
+    const char_type* do_scan_is(mask __m, const char_type* __low, const char_type* __high) const override;
+    const char_type* do_scan_not(mask __m, const char_type* __low, const char_type* __high) const override;
+    char_type do_toupper(char_type) const override;
+    const char_type* do_toupper(char_type* __low, const char_type* __high) const override;
+    char_type do_tolower(char_type) const override;
+    const char_type* do_tolower(char_type* __low, const char_type* __high) const override;
+    char_type do_widen(char) const override;
+    const char* do_widen(const char* __low, const char* __high, char_type* __dest) const override;
+    char do_narrow(char_type, char __dfault) const override;
+    const char_type* do_narrow(const char_type* __low, const char_type* __high, char __dfault, char* __dest) const override;
 };
+#endif // _LIBCPP_HAS_NO_WIDE_CHARACTERS
 
 template <class _CharT>
 inline _LIBCPP_INLINE_VISIBILITY
 bool
 isspace(_CharT __c, const locale& __loc)
 {
-    return use_facet<ctype<_CharT> >(__loc).is(ctype_base::space, __c);
+    return std::use_facet<ctype<_CharT> >(__loc).is(ctype_base::space, __c);
 }
 
 template <class _CharT>
@@ -802,7 +851,7 @@ inline _LIBCPP_INLINE_VISIBILITY
 bool
 isprint(_CharT __c, const locale& __loc)
 {
-    return use_facet<ctype<_CharT> >(__loc).is(ctype_base::print, __c);
+    return std::use_facet<ctype<_CharT> >(__loc).is(ctype_base::print, __c);
 }
 
 template <class _CharT>
@@ -810,7 +859,7 @@ inline _LIBCPP_INLINE_VISIBILITY
 bool
 iscntrl(_CharT __c, const locale& __loc)
 {
-    return use_facet<ctype<_CharT> >(__loc).is(ctype_base::cntrl, __c);
+    return std::use_facet<ctype<_CharT> >(__loc).is(ctype_base::cntrl, __c);
 }
 
 template <class _CharT>
@@ -818,7 +867,7 @@ inline _LIBCPP_INLINE_VISIBILITY
 bool
 isupper(_CharT __c, const locale& __loc)
 {
-    return use_facet<ctype<_CharT> >(__loc).is(ctype_base::upper, __c);
+    return std::use_facet<ctype<_CharT> >(__loc).is(ctype_base::upper, __c);
 }
 
 template <class _CharT>
@@ -826,7 +875,7 @@ inline _LIBCPP_INLINE_VISIBILITY
 bool
 islower(_CharT __c, const locale& __loc)
 {
-    return use_facet<ctype<_CharT> >(__loc).is(ctype_base::lower, __c);
+    return std::use_facet<ctype<_CharT> >(__loc).is(ctype_base::lower, __c);
 }
 
 template <class _CharT>
@@ -834,7 +883,7 @@ inline _LIBCPP_INLINE_VISIBILITY
 bool
 isalpha(_CharT __c, const locale& __loc)
 {
-    return use_facet<ctype<_CharT> >(__loc).is(ctype_base::alpha, __c);
+    return std::use_facet<ctype<_CharT> >(__loc).is(ctype_base::alpha, __c);
 }
 
 template <class _CharT>
@@ -842,7 +891,7 @@ inline _LIBCPP_INLINE_VISIBILITY
 bool
 isdigit(_CharT __c, const locale& __loc)
 {
-    return use_facet<ctype<_CharT> >(__loc).is(ctype_base::digit, __c);
+    return std::use_facet<ctype<_CharT> >(__loc).is(ctype_base::digit, __c);
 }
 
 template <class _CharT>
@@ -850,7 +899,7 @@ inline _LIBCPP_INLINE_VISIBILITY
 bool
 ispunct(_CharT __c, const locale& __loc)
 {
-    return use_facet<ctype<_CharT> >(__loc).is(ctype_base::punct, __c);
+    return std::use_facet<ctype<_CharT> >(__loc).is(ctype_base::punct, __c);
 }
 
 template <class _CharT>
@@ -858,7 +907,7 @@ inline _LIBCPP_INLINE_VISIBILITY
 bool
 isxdigit(_CharT __c, const locale& __loc)
 {
-    return use_facet<ctype<_CharT> >(__loc).is(ctype_base::xdigit, __c);
+    return std::use_facet<ctype<_CharT> >(__loc).is(ctype_base::xdigit, __c);
 }
 
 template <class _CharT>
@@ -866,7 +915,7 @@ inline _LIBCPP_INLINE_VISIBILITY
 bool
 isalnum(_CharT __c, const locale& __loc)
 {
-    return use_facet<ctype<_CharT> >(__loc).is(ctype_base::alnum, __c);
+    return std::use_facet<ctype<_CharT> >(__loc).is(ctype_base::alnum, __c);
 }
 
 template <class _CharT>
@@ -874,7 +923,7 @@ inline _LIBCPP_INLINE_VISIBILITY
 bool
 isgraph(_CharT __c, const locale& __loc)
 {
-    return use_facet<ctype<_CharT> >(__loc).is(ctype_base::graph, __c);
+    return std::use_facet<ctype<_CharT> >(__loc).is(ctype_base::graph, __c);
 }
 
 template <class _CharT>
@@ -882,7 +931,7 @@ inline _LIBCPP_INLINE_VISIBILITY
 _CharT
 toupper(_CharT __c, const locale& __loc)
 {
-    return use_facet<ctype<_CharT> >(__loc).toupper(__c);
+    return std::use_facet<ctype<_CharT> >(__loc).toupper(__c);
 }
 
 template <class _CharT>
@@ -890,7 +939,7 @@ inline _LIBCPP_INLINE_VISIBILITY
 _CharT
 tolower(_CharT __c, const locale& __loc)
 {
-    return use_facet<ctype<_CharT> >(__loc).tolower(__c);
+    return std::use_facet<ctype<_CharT> >(__loc).tolower(__c);
 }
 
 // codecvt_base
@@ -976,7 +1025,7 @@ protected:
     explicit codecvt(const char*, size_t __refs = 0)
         : locale::facet(__refs) {}
 
-    ~codecvt();
+    ~codecvt() override;
 
     virtual result do_out(state_type& __st,
                           const intern_type* __frm, const intern_type* __frm_end, const intern_type*& __frm_nxt,
@@ -994,12 +1043,13 @@ protected:
 
 // template <> class codecvt<wchar_t, char, mbstate_t>
 
+#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
 template <>
 class _LIBCPP_TYPE_VIS codecvt<wchar_t, char, mbstate_t>
     : public locale::facet,
       public codecvt_base
 {
-    locale_t __l;
+    locale_t __l_;
 public:
     typedef wchar_t   intern_type;
     typedef char      extern_type;
@@ -1059,7 +1109,7 @@ public:
 protected:
     explicit codecvt(const char*, size_t __refs = 0);
 
-    ~codecvt();
+    ~codecvt() override;
 
     virtual result do_out(state_type& __st,
                           const intern_type* __frm, const intern_type* __frm_end, const intern_type*& __frm_nxt,
@@ -1074,6 +1124,7 @@ protected:
     virtual int do_length(state_type&, const extern_type* __frm, const extern_type* __end, size_t __mx) const;
     virtual int do_max_length() const  _NOEXCEPT;
 };
+#endif // _LIBCPP_HAS_NO_WIDE_CHARACTERS
 
 // template <> class codecvt<char16_t, char, mbstate_t> // deprecated in C++20
 
@@ -1145,7 +1196,7 @@ protected:
     explicit codecvt(const char*, size_t __refs = 0)
         : locale::facet(__refs) {}
 
-    ~codecvt();
+    ~codecvt() override;
 
     virtual result do_out(state_type& __st,
                           const intern_type* __frm, const intern_type* __frm_end, const intern_type*& __frm_nxt,
@@ -1233,7 +1284,7 @@ protected:
     explicit codecvt(const char*, size_t __refs = 0)
         : locale::facet(__refs) {}
 
-    ~codecvt();
+    ~codecvt() override;
 
     virtual result do_out(state_type& __st,
                           const intern_type* __frm, const intern_type* __frm_end, const intern_type*& __frm_nxt,
@@ -1321,7 +1372,7 @@ protected:
     explicit codecvt(const char*, size_t __refs = 0)
         : locale::facet(__refs) {}
 
-    ~codecvt();
+    ~codecvt() override;
 
     virtual result do_out(state_type& __st,
                           const intern_type* __frm, const intern_type* __frm_end, const intern_type*& __frm_nxt,
@@ -1409,7 +1460,7 @@ protected:
     explicit codecvt(const char*, size_t __refs = 0)
         : locale::facet(__refs) {}
 
-    ~codecvt();
+    ~codecvt() override;
 
     virtual result do_out(state_type& __st,
                           const intern_type* __frm, const intern_type* __frm_end, const intern_type*& __frm_nxt,
@@ -1441,7 +1492,7 @@ public:
     explicit codecvt_byname(const string& __nm, size_t __refs = 0)
         : codecvt<_InternT, _ExternT, _StateT>(__nm.c_str(), __refs) {}
 protected:
-    ~codecvt_byname();
+    ~codecvt_byname() override;
 };
 
 _LIBCPP_SUPPRESS_DEPRECATED_PUSH
@@ -1451,13 +1502,15 @@ codecvt_byname<_InternT, _ExternT, _StateT>::~codecvt_byname()
 }
 _LIBCPP_SUPPRESS_DEPRECATED_POP
 
-_LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS codecvt_byname<char, char, mbstate_t>)
-_LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS codecvt_byname<wchar_t, char, mbstate_t>)
-_LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(class _LIBCPP_DEPRECATED_IN_CXX20 _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS codecvt_byname<char16_t, char, mbstate_t>) // deprecated in C++20
-_LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(class _LIBCPP_DEPRECATED_IN_CXX20 _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS codecvt_byname<char32_t, char, mbstate_t>) // deprecated in C++20
+extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS codecvt_byname<char, char, mbstate_t>;
+#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
+extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS codecvt_byname<wchar_t, char, mbstate_t>;
+#endif
+extern template class _LIBCPP_DEPRECATED_IN_CXX20 _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS codecvt_byname<char16_t, char, mbstate_t>; // deprecated in C++20
+extern template class _LIBCPP_DEPRECATED_IN_CXX20 _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS codecvt_byname<char32_t, char, mbstate_t>; // deprecated in C++20
 #ifndef _LIBCPP_HAS_NO_CHAR8_T
-_LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS codecvt_byname<char16_t, char8_t, mbstate_t>) // C++20
-_LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS codecvt_byname<char32_t, char8_t, mbstate_t>) // C++20
+extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS codecvt_byname<char16_t, char8_t, mbstate_t>; // C++20
+extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS codecvt_byname<char32_t, char8_t, mbstate_t>; // C++20
 #endif
 
 template <size_t _Np>
@@ -1491,7 +1544,7 @@ struct _LIBCPP_TYPE_VIS __narrow_to_utf8<16>
     __narrow_to_utf8() : codecvt<char16_t, char, mbstate_t>(1) {}
 _LIBCPP_SUPPRESS_DEPRECATED_POP
 
-    ~__narrow_to_utf8();
+    ~__narrow_to_utf8() override;
 
     template <class _OutputIterator, class _CharT>
     _LIBCPP_INLINE_VISIBILITY
@@ -1527,7 +1580,7 @@ struct _LIBCPP_TYPE_VIS __narrow_to_utf8<32>
     __narrow_to_utf8() : codecvt<char32_t, char, mbstate_t>(1) {}
 _LIBCPP_SUPPRESS_DEPRECATED_POP
 
-    ~__narrow_to_utf8();
+    ~__narrow_to_utf8() override;
 
     template <class _OutputIterator, class _CharT>
     _LIBCPP_INLINE_VISIBILITY
@@ -1585,7 +1638,7 @@ struct _LIBCPP_TYPE_VIS __widen_from_utf8<16>
     __widen_from_utf8() : codecvt<char16_t, char, mbstate_t>(1) {}
 _LIBCPP_SUPPRESS_DEPRECATED_POP
 
-    ~__widen_from_utf8();
+    ~__widen_from_utf8() override;
 
     template <class _OutputIterator>
     _LIBCPP_INLINE_VISIBILITY
@@ -1621,7 +1674,7 @@ struct _LIBCPP_TYPE_VIS __widen_from_utf8<32>
     __widen_from_utf8() : codecvt<char32_t, char, mbstate_t>(1) {}
 _LIBCPP_SUPPRESS_DEPRECATED_POP
 
-    ~__widen_from_utf8();
+    ~__widen_from_utf8() override;
 
     template <class _OutputIterator>
     _LIBCPP_INLINE_VISIBILITY
@@ -1671,7 +1724,7 @@ public:
     static locale::id id;
 
 protected:
-    ~numpunct();
+    ~numpunct() override;
     virtual char_type do_decimal_point() const;
     virtual char_type do_thousands_sep() const;
     virtual string do_grouping() const;
@@ -1683,6 +1736,7 @@ protected:
     string __grouping_;
 };
 
+#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
 template <>
 class _LIBCPP_TYPE_VIS numpunct<wchar_t>
     : public locale::facet
@@ -1702,7 +1756,7 @@ public:
     static locale::id id;
 
 protected:
-    ~numpunct();
+    ~numpunct() override;
     virtual char_type do_decimal_point() const;
     virtual char_type do_thousands_sep() const;
     virtual string do_grouping() const;
@@ -1713,6 +1767,7 @@ protected:
     char_type __thousands_sep_;
     string __grouping_;
 };
+#endif // _LIBCPP_HAS_NO_WIDE_CHARACTERS
 
 // template <class charT> class numpunct_byname
 
@@ -1730,12 +1785,13 @@ public:
     explicit numpunct_byname(const string& __nm, size_t __refs = 0);
 
 protected:
-    ~numpunct_byname();
+    ~numpunct_byname() override;
 
 private:
     void __init(const char*);
 };
 
+#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
 template <>
 class _LIBCPP_TYPE_VIS numpunct_byname<wchar_t>
 : public numpunct<wchar_t>
@@ -1748,11 +1804,12 @@ public:
     explicit numpunct_byname(const string& __nm, size_t __refs = 0);
 
 protected:
-    ~numpunct_byname();
+    ~numpunct_byname() override;
 
 private:
     void __init(const char*);
 };
+#endif // _LIBCPP_HAS_NO_WIDE_CHARACTERS
 
 _LIBCPP_END_NAMESPACE_STD
 
diff --git a/gnu/llvm/libcxx/include/__memory/pointer_safety.h b/gnu/llvm/libcxx/include/__memory/pointer_safety.h
deleted file mode 100644
index 87a6a9659e0..00000000000
--- a/gnu/llvm/libcxx/include/__memory/pointer_safety.h
+++ /dev/null
@@ -1,57 +0,0 @@
-// -*- C++ -*-
-//===----------------------------------------------------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef _LIBCPP___MEMORY_POINTER_SAFETY_H
-#define _LIBCPP___MEMORY_POINTER_SAFETY_H
-
-#include <__config>
-#include <cstddef>
-
-#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
-#endif
-
-_LIBCPP_PUSH_MACROS
-#include <__undef_macros>
-
-_LIBCPP_BEGIN_NAMESPACE_STD
-
-#if !defined(_LIBCPP_CXX03_LANG)
-
-enum class pointer_safety : unsigned char {
-  relaxed,
-  preferred,
-  strict
-};
-
-inline _LIBCPP_INLINE_VISIBILITY
-pointer_safety get_pointer_safety() _NOEXCEPT {
-  return pointer_safety::relaxed;
-}
-
-_LIBCPP_FUNC_VIS void declare_reachable(void* __p);
-_LIBCPP_FUNC_VIS void declare_no_pointers(char* __p, size_t __n);
-_LIBCPP_FUNC_VIS void undeclare_no_pointers(char* __p, size_t __n);
-_LIBCPP_FUNC_VIS void* __undeclare_reachable(void* __p);
-
-template <class _Tp>
-inline _LIBCPP_INLINE_VISIBILITY
-_Tp*
-undeclare_reachable(_Tp* __p)
-{
-    return static_cast<_Tp*>(__undeclare_reachable(__p));
-}
-
-#endif // !C++03
-
-_LIBCPP_END_NAMESPACE_STD
-
-_LIBCPP_POP_MACROS
-
-#endif // _LIBCPP___MEMORY_POINTER_SAFETY_H
diff --git a/gnu/llvm/libcxx/include/__nullptr b/gnu/llvm/libcxx/include/__nullptr
deleted file mode 100644
index 45529a710b6..00000000000
--- a/gnu/llvm/libcxx/include/__nullptr
+++ /dev/null
@@ -1,61 +0,0 @@
-// -*- C++ -*-
-//===--------------------------- __nullptr --------------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef _LIBCPP_NULLPTR
-#define _LIBCPP_NULLPTR
-
-#include <__config>
-
-#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
-#endif
-
-#ifdef _LIBCPP_HAS_NO_NULLPTR
-
-_LIBCPP_BEGIN_NAMESPACE_STD
-
-struct _LIBCPP_TEMPLATE_VIS nullptr_t
-{
-    void* __lx;
-
-    struct __nat {int __for_bool_;};
-
-    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR nullptr_t() : __lx(0) {}
-    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR nullptr_t(int __nat::*) : __lx(0) {}
-
-    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR operator int __nat::*() const {return 0;}
-
-    template <class _Tp>
-        _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
-        operator _Tp* () const {return 0;}
-
-    template <class _Tp, class _Up>
-        _LIBCPP_INLINE_VISIBILITY
-        operator _Tp _Up::* () const {return 0;}
-
-    friend _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR bool operator==(nullptr_t, nullptr_t) {return true;}
-    friend _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR bool operator!=(nullptr_t, nullptr_t) {return false;}
-};
-
-inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR nullptr_t __get_nullptr_t() {return nullptr_t(0);}
-
-#define nullptr _VSTD::__get_nullptr_t()
-
-_LIBCPP_END_NAMESPACE_STD
-
-#else  // _LIBCPP_HAS_NO_NULLPTR
-
-namespace std
-{
-    typedef decltype(nullptr) nullptr_t;
-}
-
-#endif  // _LIBCPP_HAS_NO_NULLPTR
-
-#endif  // _LIBCPP_NULLPTR
diff --git a/gnu/llvm/libcxx/include/__string b/gnu/llvm/libcxx/include/__string
deleted file mode 100644
index 056b9b80ea5..00000000000
--- a/gnu/llvm/libcxx/include/__string
+++ /dev/null
@@ -1,1061 +0,0 @@
-// -*- C++ -*-
-//===-------------------------- __string ----------------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef _LIBCPP___STRING
-#define _LIBCPP___STRING
-
-/*
-    string synopsis
-
-namespace std
-{
-
-template <class charT>
-struct char_traits
-{
-    typedef charT     char_type;
-    typedef ...       int_type;
-    typedef streamoff off_type;
-    typedef streampos pos_type;
-    typedef mbstate_t state_type;
-
-    static constexpr void assign(char_type& c1, const char_type& c2) noexcept;
-    static constexpr bool eq(char_type c1, char_type c2) noexcept;
-    static constexpr bool lt(char_type c1, char_type c2) noexcept;
-
-    static constexpr int    compare(const char_type* s1, const char_type* s2, size_t n);
-    static constexpr size_t length(const char_type* s);
-    static constexpr const char_type*
-                            find(const char_type* s, size_t n, const char_type& a);
-
-    static constexpr char_type* move(char_type* s1, const char_type* s2, size_t n); // constexpr in C++20
-    static constexpr char_type* copy(char_type* s1, const char_type* s2, size_t n); // constexpr in C++20
-    static constexpr char_type* assign(char_type* s, size_t n, char_type a);        // constexpr in C++20
-
-    static constexpr int_type  not_eof(int_type c) noexcept;
-    static constexpr char_type to_char_type(int_type c) noexcept;
-    static constexpr int_type  to_int_type(char_type c) noexcept;
-    static constexpr bool      eq_int_type(int_type c1, int_type c2) noexcept;
-    static constexpr int_type  eof() noexcept;
-};
-
-template <> struct char_traits<char>;
-template <> struct char_traits<wchar_t>;
-template <> struct char_traits<char8_t>;  // c++20
-
-}  // std
-
-*/
-
-#include <__config>
-#include <algorithm>  // for search and min
-#include <cstdio>     // For EOF.
-#include <memory>     // for __murmur2_or_cityhash
-
-#include <__debug>
-
-#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
-#endif
-
-_LIBCPP_PUSH_MACROS
-#include <__undef_macros>
-
-
-_LIBCPP_BEGIN_NAMESPACE_STD
-
-// char_traits
-
-template <class _CharT>
-struct _LIBCPP_TEMPLATE_VIS char_traits
-{
-    typedef _CharT    char_type;
-    typedef int       int_type;
-    typedef streamoff off_type;
-    typedef streampos pos_type;
-    typedef mbstate_t state_type;
-
-    static inline void _LIBCPP_CONSTEXPR_AFTER_CXX14
-        assign(char_type& __c1, const char_type& __c2) _NOEXCEPT {__c1 = __c2;}
-    static inline _LIBCPP_CONSTEXPR bool eq(char_type __c1, char_type __c2) _NOEXCEPT
-        {return __c1 == __c2;}
-    static inline _LIBCPP_CONSTEXPR bool lt(char_type __c1, char_type __c2) _NOEXCEPT
-        {return __c1 < __c2;}
-
-    static _LIBCPP_CONSTEXPR_AFTER_CXX14
-    int compare(const char_type* __s1, const char_type* __s2, size_t __n);
-    _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR_AFTER_CXX14
-    size_t length(const char_type* __s);
-    _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR_AFTER_CXX14
-    const char_type* find(const char_type* __s, size_t __n, const char_type& __a);
-    static _LIBCPP_CONSTEXPR_AFTER_CXX17
-    char_type*       move(char_type* __s1, const char_type* __s2, size_t __n);
-    _LIBCPP_INLINE_VISIBILITY
-    static _LIBCPP_CONSTEXPR_AFTER_CXX17
-    char_type*       copy(char_type* __s1, const char_type* __s2, size_t __n);
-    _LIBCPP_INLINE_VISIBILITY
-    static _LIBCPP_CONSTEXPR_AFTER_CXX17
-    char_type*       assign(char_type* __s, size_t __n, char_type __a);
-
-    static inline _LIBCPP_CONSTEXPR int_type  not_eof(int_type __c) _NOEXCEPT
-        {return eq_int_type(__c, eof()) ? ~eof() : __c;}
-    static inline _LIBCPP_CONSTEXPR char_type to_char_type(int_type __c) _NOEXCEPT
-        {return char_type(__c);}
-    static inline _LIBCPP_CONSTEXPR int_type  to_int_type(char_type __c) _NOEXCEPT
-        {return int_type(__c);}
-    static inline _LIBCPP_CONSTEXPR bool      eq_int_type(int_type __c1, int_type __c2) _NOEXCEPT
-        {return __c1 == __c2;}
-    static inline _LIBCPP_CONSTEXPR int_type  eof() _NOEXCEPT
-        {return int_type(EOF);}
-};
-
-template <class _CharT>
-_LIBCPP_CONSTEXPR_AFTER_CXX14 int
-char_traits<_CharT>::compare(const char_type* __s1, const char_type* __s2, size_t __n)
-{
-    for (; __n; --__n, ++__s1, ++__s2)
-    {
-        if (lt(*__s1, *__s2))
-            return -1;
-        if (lt(*__s2, *__s1))
-            return 1;
-    }
-    return 0;
-}
-
-template <class _CharT>
-inline
-_LIBCPP_CONSTEXPR_AFTER_CXX14 size_t
-char_traits<_CharT>::length(const char_type* __s)
-{
-    size_t __len = 0;
-    for (; !eq(*__s, char_type(0)); ++__s)
-        ++__len;
-    return __len;
-}
-
-template <class _CharT>
-inline
-_LIBCPP_CONSTEXPR_AFTER_CXX14 const _CharT*
-char_traits<_CharT>::find(const char_type* __s, size_t __n, const char_type& __a)
-{
-    for (; __n; --__n)
-    {
-        if (eq(*__s, __a))
-            return __s;
-        ++__s;
-    }
-    return 0;
-}
-
-template <class _CharT>
-_LIBCPP_CONSTEXPR_AFTER_CXX17 _CharT*
-char_traits<_CharT>::move(char_type* __s1, const char_type* __s2, size_t __n)
-{
-    if (__n == 0) return __s1;
-    char_type* __r = __s1;
-    if (__s1 < __s2)
-    {
-        for (; __n; --__n, ++__s1, ++__s2)
-            assign(*__s1, *__s2);
-    }
-    else if (__s2 < __s1)
-    {
-        __s1 += __n;
-        __s2 += __n;
-        for (; __n; --__n)
-            assign(*--__s1, *--__s2);
-    }
-    return __r;
-}
-
-template <class _CharT>
-inline _LIBCPP_CONSTEXPR_AFTER_CXX17
-_CharT*
-char_traits<_CharT>::copy(char_type* __s1, const char_type* __s2, size_t __n)
-{
-    _LIBCPP_ASSERT(__s2 < __s1 || __s2 >= __s1+__n, "char_traits::copy overlapped range");
-    char_type* __r = __s1;
-    for (; __n; --__n, ++__s1, ++__s2)
-        assign(*__s1, *__s2);
-    return __r;
-}
-
-template <class _CharT>
-inline _LIBCPP_CONSTEXPR_AFTER_CXX17
-_CharT*
-char_traits<_CharT>::assign(char_type* __s, size_t __n, char_type __a)
-{
-    char_type* __r = __s;
-    for (; __n; --__n, ++__s)
-        assign(*__s, __a);
-    return __r;
-}
-
-// constexpr versions of move/copy/assign.
-
-template <class _CharT>
-static inline _LIBCPP_CONSTEXPR_AFTER_CXX17_WITH_IS_CONSTANT_EVALUATED
-_CharT* __move_constexpr(_CharT* __s1, const _CharT* __s2, size_t __n) _NOEXCEPT
-{
-    if (__n == 0) return __s1;
-    if (__s1 < __s2) {
-      _VSTD::copy(__s2, __s2 + __n, __s1);
-    } else if (__s2 < __s1) {
-      _VSTD::copy_backward(__s2, __s2 + __n, __s1 + __n);
-    }
-    return __s1;
-}
-
-template <class _CharT>
-static inline _LIBCPP_CONSTEXPR_AFTER_CXX17_WITH_IS_CONSTANT_EVALUATED
-_CharT* __copy_constexpr(_CharT* __s1, const _CharT* __s2, size_t __n) _NOEXCEPT
-{
-    _VSTD::copy_n(__s2, __n, __s1);
-    return __s1;
-}
-
-template <class _CharT>
-static inline _LIBCPP_CONSTEXPR_AFTER_CXX17_WITH_IS_CONSTANT_EVALUATED
-_CharT* __assign_constexpr(_CharT* __s, size_t __n, _CharT __a) _NOEXCEPT
-{
-     _VSTD::fill_n(__s, __n, __a);
-     return __s;
-}
-
-// char_traits<char>
-
-template <>
-struct _LIBCPP_TEMPLATE_VIS char_traits<char>
-{
-    typedef char      char_type;
-    typedef int       int_type;
-    typedef streamoff off_type;
-    typedef streampos pos_type;
-    typedef mbstate_t state_type;
-
-    static inline _LIBCPP_CONSTEXPR_AFTER_CXX14
-    void assign(char_type& __c1, const char_type& __c2) _NOEXCEPT {__c1 = __c2;}
-    static inline _LIBCPP_CONSTEXPR bool eq(char_type __c1, char_type __c2) _NOEXCEPT
-            {return __c1 == __c2;}
-    static inline _LIBCPP_CONSTEXPR bool lt(char_type __c1, char_type __c2) _NOEXCEPT
-        {return (unsigned char)__c1 < (unsigned char)__c2;}
-
-    static _LIBCPP_CONSTEXPR_AFTER_CXX14
-    int compare(const char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT;
-    static inline size_t _LIBCPP_CONSTEXPR_AFTER_CXX14
-    length(const char_type* __s)  _NOEXCEPT {return __builtin_strlen(__s);}
-    static _LIBCPP_CONSTEXPR_AFTER_CXX14
-    const char_type* find(const char_type* __s, size_t __n, const char_type& __a) _NOEXCEPT;
-    static inline _LIBCPP_CONSTEXPR_AFTER_CXX17_WITH_IS_CONSTANT_EVALUATED
-    char_type* move(char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT
-        {
-            return __libcpp_is_constant_evaluated()
-                       ? __move_constexpr(__s1, __s2, __n)
-                       : __n == 0 ? __s1 : (char_type*)memmove(__s1, __s2, __n);
-        }
-    static inline _LIBCPP_CONSTEXPR_AFTER_CXX17_WITH_IS_CONSTANT_EVALUATED
-    char_type* copy(char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT
-        {
-            _LIBCPP_ASSERT(__s2 < __s1 || __s2 >= __s1+__n, "char_traits::copy overlapped range");
-            return __libcpp_is_constant_evaluated()
-                       ? __copy_constexpr(__s1, __s2, __n)
-                       : __n == 0 ? __s1 : (char_type*)memcpy(__s1, __s2, __n);
-        }
-    static inline _LIBCPP_CONSTEXPR_AFTER_CXX17_WITH_IS_CONSTANT_EVALUATED
-    char_type* assign(char_type* __s, size_t __n, char_type __a) _NOEXCEPT
-        {
-            return __libcpp_is_constant_evaluated()
-                       ? __assign_constexpr(__s, __n, __a)
-                       : __n == 0 ? __s : (char_type*)memset(__s, to_int_type(__a), __n);
-        }
-
-    static inline _LIBCPP_CONSTEXPR int_type  not_eof(int_type __c) _NOEXCEPT
-        {return eq_int_type(__c, eof()) ? ~eof() : __c;}
-    static inline _LIBCPP_CONSTEXPR char_type to_char_type(int_type __c) _NOEXCEPT
-        {return char_type(__c);}
-    static inline _LIBCPP_CONSTEXPR int_type to_int_type(char_type __c) _NOEXCEPT
-        {return int_type((unsigned char)__c);}
-    static inline _LIBCPP_CONSTEXPR bool eq_int_type(int_type __c1, int_type __c2) _NOEXCEPT
-        {return __c1 == __c2;}
-    static inline _LIBCPP_CONSTEXPR int_type  eof() _NOEXCEPT
-        {return int_type(EOF);}
-};
-
-inline _LIBCPP_CONSTEXPR_AFTER_CXX14
-int
-char_traits<char>::compare(const char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT
-{
-    if (__n == 0)
-        return 0;
-#if __has_feature(cxx_constexpr_string_builtins)
-    return __builtin_memcmp(__s1, __s2, __n);
-#elif _LIBCPP_STD_VER <= 14
-    return memcmp(__s1, __s2, __n);
-#else
-    for (; __n; --__n, ++__s1, ++__s2)
-    {
-        if (lt(*__s1, *__s2))
-            return -1;
-        if (lt(*__s2, *__s1))
-            return 1;
-    }
-    return 0;
-#endif
-}
-
-inline _LIBCPP_CONSTEXPR_AFTER_CXX14
-const char*
-char_traits<char>::find(const char_type* __s, size_t __n, const char_type& __a) _NOEXCEPT
-{
-    if (__n == 0)
-        return nullptr;
-#if __has_feature(cxx_constexpr_string_builtins)
-    return __builtin_char_memchr(__s, to_int_type(__a), __n);
-#elif _LIBCPP_STD_VER <= 14
-    return (const char_type*) memchr(__s, to_int_type(__a), __n);
-#else
-    for (; __n; --__n)
-    {
-        if (eq(*__s, __a))
-            return __s;
-        ++__s;
-    }
-    return nullptr;
-#endif
-}
-
-
-// char_traits<wchar_t>
-
-template <>
-struct _LIBCPP_TEMPLATE_VIS char_traits<wchar_t>
-{
-    typedef wchar_t   char_type;
-    typedef wint_t    int_type;
-    typedef streamoff off_type;
-    typedef streampos pos_type;
-    typedef mbstate_t state_type;
-
-    static inline _LIBCPP_CONSTEXPR_AFTER_CXX14
-    void assign(char_type& __c1, const char_type& __c2) _NOEXCEPT {__c1 = __c2;}
-    static inline _LIBCPP_CONSTEXPR bool eq(char_type __c1, char_type __c2) _NOEXCEPT
-        {return __c1 == __c2;}
-    static inline _LIBCPP_CONSTEXPR bool lt(char_type __c1, char_type __c2) _NOEXCEPT
-        {return __c1 < __c2;}
-
-    static _LIBCPP_CONSTEXPR_AFTER_CXX14
-    int compare(const char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT;
-    static _LIBCPP_CONSTEXPR_AFTER_CXX14
-    size_t length(const char_type* __s) _NOEXCEPT;
-    static _LIBCPP_CONSTEXPR_AFTER_CXX14
-    const char_type* find(const char_type* __s, size_t __n, const char_type& __a) _NOEXCEPT;
-    static inline _LIBCPP_CONSTEXPR_AFTER_CXX17_WITH_IS_CONSTANT_EVALUATED
-    char_type* move(char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT
-        {
-            return __libcpp_is_constant_evaluated()
-                       ? __move_constexpr(__s1, __s2, __n)
-                       : __n == 0 ? __s1 : wmemmove(__s1, __s2, __n);
-        }
-    static inline _LIBCPP_CONSTEXPR_AFTER_CXX17_WITH_IS_CONSTANT_EVALUATED
-    char_type* copy(char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT
-        {
-            _LIBCPP_ASSERT(__s2 < __s1 || __s2 >= __s1+__n, "char_traits::copy overlapped range");
-            return __libcpp_is_constant_evaluated()
-                       ? __copy_constexpr(__s1, __s2, __n)
-                       : __n == 0 ? __s1 : wmemcpy(__s1, __s2, __n);
-        }
-    static inline _LIBCPP_CONSTEXPR_AFTER_CXX17_WITH_IS_CONSTANT_EVALUATED
-    char_type* assign(char_type* __s, size_t __n, char_type __a) _NOEXCEPT
-        {
-            return __libcpp_is_constant_evaluated()
-                       ? __assign_constexpr(__s, __n, __a)
-                       : __n == 0 ? __s : wmemset(__s, __a, __n);
-        }
-    static inline _LIBCPP_CONSTEXPR int_type  not_eof(int_type __c) _NOEXCEPT
-        {return eq_int_type(__c, eof()) ? ~eof() : __c;}
-    static inline _LIBCPP_CONSTEXPR char_type to_char_type(int_type __c) _NOEXCEPT
-        {return char_type(__c);}
-    static inline _LIBCPP_CONSTEXPR int_type to_int_type(char_type __c) _NOEXCEPT
-        {return int_type(__c);}
-    static inline _LIBCPP_CONSTEXPR bool eq_int_type(int_type __c1, int_type __c2) _NOEXCEPT
-        {return __c1 == __c2;}
-    static inline _LIBCPP_CONSTEXPR int_type eof() _NOEXCEPT
-        {return int_type(WEOF);}
-};
-
-inline _LIBCPP_CONSTEXPR_AFTER_CXX14
-int
-char_traits<wchar_t>::compare(const char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT
-{
-    if (__n == 0)
-        return 0;
-#if __has_feature(cxx_constexpr_string_builtins)
-    return __builtin_wmemcmp(__s1, __s2, __n);
-#elif _LIBCPP_STD_VER <= 14
-    return wmemcmp(__s1, __s2, __n);
-#else
-    for (; __n; --__n, ++__s1, ++__s2)
-    {
-        if (lt(*__s1, *__s2))
-            return -1;
-        if (lt(*__s2, *__s1))
-            return 1;
-    }
-    return 0;
-#endif
-}
-
-
-template <class _Traits>
-_LIBCPP_INLINE_VISIBILITY
-_LIBCPP_CONSTEXPR
-inline size_t __char_traits_length_checked(const typename _Traits::char_type* __s) _NOEXCEPT {
-#if _LIBCPP_DEBUG_LEVEL >= 1
-  return __s ? _Traits::length(__s) : (_VSTD::__libcpp_debug_function(_VSTD::__libcpp_debug_info(__FILE__, __LINE__, "p == nullptr", "null pointer pass to non-null argument of char_traits<...>::length")), 0);
-#else
-  return _Traits::length(__s);
-#endif
-}
-
-inline _LIBCPP_CONSTEXPR_AFTER_CXX14
-size_t
-char_traits<wchar_t>::length(const char_type* __s) _NOEXCEPT
-{
-#if __has_feature(cxx_constexpr_string_builtins)
-    return __builtin_wcslen(__s);
-#elif _LIBCPP_STD_VER <= 14
-    return wcslen(__s);
-#else
-    size_t __len = 0;
-    for (; !eq(*__s, char_type(0)); ++__s)
-        ++__len;
-    return __len;
-#endif
-}
-
-inline _LIBCPP_CONSTEXPR_AFTER_CXX14
-const wchar_t*
-char_traits<wchar_t>::find(const char_type* __s, size_t __n, const char_type& __a) _NOEXCEPT
-{
-    if (__n == 0)
-        return nullptr;
-#if __has_feature(cxx_constexpr_string_builtins)
-    return __builtin_wmemchr(__s, __a, __n);
-#elif _LIBCPP_STD_VER <= 14
-    return wmemchr(__s, __a, __n);
-#else
-    for (; __n; --__n)
-    {
-        if (eq(*__s, __a))
-            return __s;
-        ++__s;
-    }
-    return nullptr;
-#endif
-}
-
-
-#ifndef _LIBCPP_NO_HAS_CHAR8_T
-
-template <>
-struct _LIBCPP_TEMPLATE_VIS char_traits<char8_t>
-{
-    typedef char8_t        char_type;
-    typedef unsigned int   int_type;
-    typedef streamoff      off_type;
-    typedef u8streampos    pos_type;
-    typedef mbstate_t      state_type;
-
-    static inline constexpr void assign(char_type& __c1, const char_type& __c2) noexcept
-        {__c1 = __c2;}
-    static inline constexpr bool eq(char_type __c1, char_type __c2) noexcept
-        {return __c1 == __c2;}
-    static inline constexpr bool lt(char_type __c1, char_type __c2) noexcept
-        {return __c1 < __c2;}
-
-    static constexpr
-    int              compare(const char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT;
-
-    static constexpr
-    size_t           length(const char_type* __s) _NOEXCEPT;
-
-    _LIBCPP_INLINE_VISIBILITY static constexpr
-    const char_type* find(const char_type* __s, size_t __n, const char_type& __a) _NOEXCEPT;
-
-    static _LIBCPP_CONSTEXPR_AFTER_CXX17_WITH_IS_CONSTANT_EVALUATED
-    char_type*       move(char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT
-        {
-            return __libcpp_is_constant_evaluated()
-                       ? __move_constexpr(__s1, __s2, __n)
-                       : __n == 0 ? __s1 : (char_type*)memmove(__s1, __s2, __n);
-        }
-
-    static _LIBCPP_CONSTEXPR_AFTER_CXX17_WITH_IS_CONSTANT_EVALUATED
-    char_type*       copy(char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT
-       {
-            _LIBCPP_ASSERT(__s2 < __s1 || __s2 >= __s1+__n, "char_traits::copy overlapped range");
-            return __libcpp_is_constant_evaluated()
-                       ? __copy_constexpr(__s1, __s2, __n)
-                       : __n == 0 ? __s1 : (char_type*)memcpy(__s1, __s2, __n);
-        }
-
-    static _LIBCPP_CONSTEXPR_AFTER_CXX17_WITH_IS_CONSTANT_EVALUATED
-    char_type*       assign(char_type* __s, size_t __n, char_type __a) _NOEXCEPT
-        {
-            return __libcpp_is_constant_evaluated()
-                       ? __assign_constexpr(__s, __n, __a)
-                       : __n == 0 ? __s : (char_type*)memset(__s, to_int_type(__a), __n);
-        }
-
-    static inline constexpr int_type  not_eof(int_type __c) noexcept
-        {return eq_int_type(__c, eof()) ? ~eof() : __c;}
-    static inline constexpr char_type to_char_type(int_type __c) noexcept
-        {return char_type(__c);}
-    static inline constexpr int_type to_int_type(char_type __c) noexcept
-        {return int_type(__c);}
-    static inline constexpr bool eq_int_type(int_type __c1, int_type __c2) noexcept
-        {return __c1 == __c2;}
-    static inline constexpr int_type eof() noexcept
-        {return int_type(EOF);}
-};
-
-// TODO use '__builtin_strlen' if it ever supports char8_t ??
-inline constexpr
-size_t
-char_traits<char8_t>::length(const char_type* __s) _NOEXCEPT
-{
-    size_t __len = 0;
-    for (; !eq(*__s, char_type(0)); ++__s)
-        ++__len;
-    return __len;
-}
-
-inline constexpr
-int
-char_traits<char8_t>::compare(const char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT
-{
-#if __has_feature(cxx_constexpr_string_builtins)
-    return __builtin_memcmp(__s1, __s2, __n);
-#else
-    for (; __n; --__n, ++__s1, ++__s2)
-    {
-        if (lt(*__s1, *__s2))
-            return -1;
-        if (lt(*__s2, *__s1))
-            return 1;
-    }
-    return 0;
-#endif
-}
-
-// TODO use '__builtin_char_memchr' if it ever supports char8_t ??
-inline constexpr
-const char8_t*
-char_traits<char8_t>::find(const char_type* __s, size_t __n, const char_type& __a) _NOEXCEPT
-{
-    for (; __n; --__n)
-    {
-        if (eq(*__s, __a))
-            return __s;
-        ++__s;
-    }
-    return 0;
-}
-
-#endif // #_LIBCPP_NO_HAS_CHAR8_T
-
-#ifndef _LIBCPP_HAS_NO_UNICODE_CHARS
-
-template <>
-struct _LIBCPP_TEMPLATE_VIS char_traits<char16_t>
-{
-    typedef char16_t       char_type;
-    typedef uint_least16_t int_type;
-    typedef streamoff      off_type;
-    typedef u16streampos   pos_type;
-    typedef mbstate_t      state_type;
-
-    static inline _LIBCPP_CONSTEXPR_AFTER_CXX14
-    void assign(char_type& __c1, const char_type& __c2) _NOEXCEPT {__c1 = __c2;}
-    static inline _LIBCPP_CONSTEXPR bool eq(char_type __c1, char_type __c2) _NOEXCEPT
-        {return __c1 == __c2;}
-    static inline _LIBCPP_CONSTEXPR bool lt(char_type __c1, char_type __c2) _NOEXCEPT
-        {return __c1 < __c2;}
-
-    _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR_AFTER_CXX14
-    int              compare(const char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT;
-    _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR_AFTER_CXX14
-    size_t           length(const char_type* __s) _NOEXCEPT;
-    _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR_AFTER_CXX14
-    const char_type* find(const char_type* __s, size_t __n, const char_type& __a) _NOEXCEPT;
-    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
-    static char_type*       move(char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT;
-    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
-    static char_type*       copy(char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT;
-    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
-    static char_type*       assign(char_type* __s, size_t __n, char_type __a) _NOEXCEPT;
-
-    static inline _LIBCPP_CONSTEXPR int_type  not_eof(int_type __c) _NOEXCEPT
-        {return eq_int_type(__c, eof()) ? ~eof() : __c;}
-    static inline _LIBCPP_CONSTEXPR char_type to_char_type(int_type __c) _NOEXCEPT
-        {return char_type(__c);}
-    static inline _LIBCPP_CONSTEXPR int_type to_int_type(char_type __c) _NOEXCEPT
-        {return int_type(__c);}
-    static inline _LIBCPP_CONSTEXPR bool eq_int_type(int_type __c1, int_type __c2) _NOEXCEPT
-        {return __c1 == __c2;}
-    static inline _LIBCPP_CONSTEXPR int_type eof() _NOEXCEPT
-        {return int_type(0xFFFF);}
-};
-
-inline _LIBCPP_CONSTEXPR_AFTER_CXX14
-int
-char_traits<char16_t>::compare(const char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT
-{
-    for (; __n; --__n, ++__s1, ++__s2)
-    {
-        if (lt(*__s1, *__s2))
-            return -1;
-        if (lt(*__s2, *__s1))
-            return 1;
-    }
-    return 0;
-}
-
-inline _LIBCPP_CONSTEXPR_AFTER_CXX14
-size_t
-char_traits<char16_t>::length(const char_type* __s) _NOEXCEPT
-{
-    size_t __len = 0;
-    for (; !eq(*__s, char_type(0)); ++__s)
-        ++__len;
-    return __len;
-}
-
-inline _LIBCPP_CONSTEXPR_AFTER_CXX14
-const char16_t*
-char_traits<char16_t>::find(const char_type* __s, size_t __n, const char_type& __a) _NOEXCEPT
-{
-    for (; __n; --__n)
-    {
-        if (eq(*__s, __a))
-            return __s;
-        ++__s;
-    }
-    return 0;
-}
-
-inline _LIBCPP_CONSTEXPR_AFTER_CXX17
-char16_t*
-char_traits<char16_t>::move(char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT
-{
-    if (__n == 0) return __s1;
-    char_type* __r = __s1;
-    if (__s1 < __s2)
-    {
-        for (; __n; --__n, ++__s1, ++__s2)
-            assign(*__s1, *__s2);
-    }
-    else if (__s2 < __s1)
-    {
-        __s1 += __n;
-        __s2 += __n;
-        for (; __n; --__n)
-            assign(*--__s1, *--__s2);
-    }
-    return __r;
-}
-
-inline _LIBCPP_CONSTEXPR_AFTER_CXX17
-char16_t*
-char_traits<char16_t>::copy(char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT
-{
-    _LIBCPP_ASSERT(__s2 < __s1 || __s2 >= __s1+__n, "char_traits::copy overlapped range");
-    char_type* __r = __s1;
-    for (; __n; --__n, ++__s1, ++__s2)
-        assign(*__s1, *__s2);
-    return __r;
-}
-
-inline _LIBCPP_CONSTEXPR_AFTER_CXX17
-char16_t*
-char_traits<char16_t>::assign(char_type* __s, size_t __n, char_type __a) _NOEXCEPT
-{
-    char_type* __r = __s;
-    for (; __n; --__n, ++__s)
-        assign(*__s, __a);
-    return __r;
-}
-
-template <>
-struct _LIBCPP_TEMPLATE_VIS char_traits<char32_t>
-{
-    typedef char32_t       char_type;
-    typedef uint_least32_t int_type;
-    typedef streamoff      off_type;
-    typedef u32streampos   pos_type;
-    typedef mbstate_t      state_type;
-
-    static inline _LIBCPP_CONSTEXPR_AFTER_CXX14
-    void assign(char_type& __c1, const char_type& __c2) _NOEXCEPT {__c1 = __c2;}
-    static inline _LIBCPP_CONSTEXPR bool eq(char_type __c1, char_type __c2) _NOEXCEPT
-        {return __c1 == __c2;}
-    static inline _LIBCPP_CONSTEXPR bool lt(char_type __c1, char_type __c2) _NOEXCEPT
-        {return __c1 < __c2;}
-
-    _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR_AFTER_CXX14
-    int              compare(const char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT;
-    _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR_AFTER_CXX14
-    size_t           length(const char_type* __s) _NOEXCEPT;
-    _LIBCPP_INLINE_VISIBILITY static _LIBCPP_CONSTEXPR_AFTER_CXX14
-    const char_type* find(const char_type* __s, size_t __n, const char_type& __a) _NOEXCEPT;
-    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
-    static char_type*       move(char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT;
-    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
-    static char_type*       copy(char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT;
-    _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
-    static char_type*       assign(char_type* __s, size_t __n, char_type __a) _NOEXCEPT;
-
-    static inline _LIBCPP_CONSTEXPR int_type  not_eof(int_type __c) _NOEXCEPT
-        {return eq_int_type(__c, eof()) ? ~eof() : __c;}
-    static inline _LIBCPP_CONSTEXPR char_type to_char_type(int_type __c) _NOEXCEPT
-        {return char_type(__c);}
-    static inline _LIBCPP_CONSTEXPR int_type to_int_type(char_type __c) _NOEXCEPT
-        {return int_type(__c);}
-    static inline _LIBCPP_CONSTEXPR bool eq_int_type(int_type __c1, int_type __c2) _NOEXCEPT
-        {return __c1 == __c2;}
-    static inline _LIBCPP_CONSTEXPR int_type eof() _NOEXCEPT
-        {return int_type(0xFFFFFFFF);}
-};
-
-inline _LIBCPP_CONSTEXPR_AFTER_CXX14
-int
-char_traits<char32_t>::compare(const char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT
-{
-    for (; __n; --__n, ++__s1, ++__s2)
-    {
-        if (lt(*__s1, *__s2))
-            return -1;
-        if (lt(*__s2, *__s1))
-            return 1;
-    }
-    return 0;
-}
-
-inline _LIBCPP_CONSTEXPR_AFTER_CXX14
-size_t
-char_traits<char32_t>::length(const char_type* __s) _NOEXCEPT
-{
-    size_t __len = 0;
-    for (; !eq(*__s, char_type(0)); ++__s)
-        ++__len;
-    return __len;
-}
-
-inline _LIBCPP_CONSTEXPR_AFTER_CXX14
-const char32_t*
-char_traits<char32_t>::find(const char_type* __s, size_t __n, const char_type& __a) _NOEXCEPT
-{
-    for (; __n; --__n)
-    {
-        if (eq(*__s, __a))
-            return __s;
-        ++__s;
-    }
-    return 0;
-}
-
-inline _LIBCPP_CONSTEXPR_AFTER_CXX17
-char32_t*
-char_traits<char32_t>::move(char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT
-{
-    if (__n == 0) return __s1;
-    char_type* __r = __s1;
-    if (__s1 < __s2)
-    {
-        for (; __n; --__n, ++__s1, ++__s2)
-            assign(*__s1, *__s2);
-    }
-    else if (__s2 < __s1)
-    {
-        __s1 += __n;
-        __s2 += __n;
-        for (; __n; --__n)
-            assign(*--__s1, *--__s2);
-    }
-    return __r;
-}
-
-inline _LIBCPP_CONSTEXPR_AFTER_CXX17
-char32_t*
-char_traits<char32_t>::copy(char_type* __s1, const char_type* __s2, size_t __n) _NOEXCEPT
-{
-    _LIBCPP_ASSERT(__s2 < __s1 || __s2 >= __s1+__n, "char_traits::copy overlapped range");
-    char_type* __r = __s1;
-    for (; __n; --__n, ++__s1, ++__s2)
-        assign(*__s1, *__s2);
-    return __r;
-}
-
-inline _LIBCPP_CONSTEXPR_AFTER_CXX17
-char32_t*
-char_traits<char32_t>::assign(char_type* __s, size_t __n, char_type __a) _NOEXCEPT
-{
-    char_type* __r = __s;
-    for (; __n; --__n, ++__s)
-        assign(*__s, __a);
-    return __r;
-}
-
-#endif  // _LIBCPP_HAS_NO_UNICODE_CHARS
-
-// helper fns for basic_string and string_view
-
-// __str_find
-template<class _CharT, class _SizeT, class _Traits, _SizeT __npos>
-inline _SizeT _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-__str_find(const _CharT *__p, _SizeT __sz,
-             _CharT __c, _SizeT __pos) _NOEXCEPT
-{
-    if (__pos >= __sz)
-        return __npos;
-    const _CharT* __r = _Traits::find(__p + __pos, __sz - __pos, __c);
-    if (__r == 0)
-        return __npos;
-    return static_cast<_SizeT>(__r - __p);
-}
-
-template <class _CharT, class _Traits>
-inline _LIBCPP_CONSTEXPR_AFTER_CXX11 const _CharT *
-__search_substring(const _CharT *__first1, const _CharT *__last1,
-                   const _CharT *__first2, const _CharT *__last2) {
-  // Take advantage of knowing source and pattern lengths.
-  // Stop short when source is smaller than pattern.
-  const ptrdiff_t __len2 = __last2 - __first2;
-  if (__len2 == 0)
-    return __first1;
-
-  ptrdiff_t __len1 = __last1 - __first1;
-  if (__len1 < __len2)
-    return __last1;
-
-  // First element of __first2 is loop invariant.
-  _CharT __f2 = *__first2;
-  while (true) {
-    __len1 = __last1 - __first1;
-    // Check whether __first1 still has at least __len2 bytes.
-    if (__len1 < __len2)
-      return __last1;
-
-    // Find __f2 the first byte matching in __first1.
-    __first1 = _Traits::find(__first1, __len1 - __len2 + 1, __f2);
-    if (__first1 == 0)
-      return __last1;
-
-    // It is faster to compare from the first byte of __first1 even if we
-    // already know that it matches the first byte of __first2: this is because
-    // __first2 is most likely aligned, as it is user's "pattern" string, and
-    // __first1 + 1 is most likely not aligned, as the match is in the middle of
-    // the string.
-    if (_Traits::compare(__first1, __first2, __len2) == 0)
-      return __first1;
-
-    ++__first1;
-  }
-}
-
-template<class _CharT, class _SizeT, class _Traits, _SizeT __npos>
-inline _SizeT _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-__str_find(const _CharT *__p, _SizeT __sz,
-       const _CharT* __s, _SizeT __pos, _SizeT __n) _NOEXCEPT
-{
-    if (__pos > __sz)
-        return __npos;
-
-    if (__n == 0) // There is nothing to search, just return __pos.
-        return __pos;
-
-    const _CharT *__r = __search_substring<_CharT, _Traits>(
-        __p + __pos, __p + __sz, __s, __s + __n);
-
-    if (__r == __p + __sz)
-        return __npos;
-    return static_cast<_SizeT>(__r - __p);
-}
-
-
-// __str_rfind
-
-template<class _CharT, class _SizeT, class _Traits, _SizeT __npos>
-inline _SizeT _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-__str_rfind(const _CharT *__p, _SizeT __sz,
-              _CharT __c, _SizeT __pos) _NOEXCEPT
-{
-    if (__sz < 1)
-        return __npos;
-    if (__pos < __sz)
-        ++__pos;
-    else
-        __pos = __sz;
-    for (const _CharT* __ps = __p + __pos; __ps != __p;)
-    {
-        if (_Traits::eq(*--__ps, __c))
-            return static_cast<_SizeT>(__ps - __p);
-    }
-    return __npos;
-}
-
-template<class _CharT, class _SizeT, class _Traits, _SizeT __npos>
-inline _SizeT _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-__str_rfind(const _CharT *__p, _SizeT __sz,
-        const _CharT* __s, _SizeT __pos, _SizeT __n) _NOEXCEPT
-{
-    __pos = _VSTD::min(__pos, __sz);
-    if (__n < __sz - __pos)
-        __pos += __n;
-    else
-        __pos = __sz;
-    const _CharT* __r = _VSTD::__find_end(
-                  __p, __p + __pos, __s, __s + __n, _Traits::eq,
-                        random_access_iterator_tag(), random_access_iterator_tag());
-    if (__n > 0 && __r == __p + __pos)
-        return __npos;
-    return static_cast<_SizeT>(__r - __p);
-}
-
-// __str_find_first_of
-template<class _CharT, class _SizeT, class _Traits, _SizeT __npos>
-inline _SizeT _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-__str_find_first_of(const _CharT *__p, _SizeT __sz,
-                const _CharT* __s, _SizeT __pos, _SizeT __n) _NOEXCEPT
-{
-    if (__pos >= __sz || __n == 0)
-        return __npos;
-    const _CharT* __r = _VSTD::__find_first_of_ce
-        (__p + __pos, __p + __sz, __s, __s + __n, _Traits::eq );
-    if (__r == __p + __sz)
-        return __npos;
-    return static_cast<_SizeT>(__r - __p);
-}
-
-
-// __str_find_last_of
-template<class _CharT, class _SizeT, class _Traits, _SizeT __npos>
-inline _SizeT _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-__str_find_last_of(const _CharT *__p, _SizeT __sz,
-               const _CharT* __s, _SizeT __pos, _SizeT __n) _NOEXCEPT
-    {
-    if (__n != 0)
-    {
-        if (__pos < __sz)
-            ++__pos;
-        else
-            __pos = __sz;
-        for (const _CharT* __ps = __p + __pos; __ps != __p;)
-        {
-            const _CharT* __r = _Traits::find(__s, __n, *--__ps);
-            if (__r)
-                return static_cast<_SizeT>(__ps - __p);
-        }
-    }
-    return __npos;
-}
-
-
-// __str_find_first_not_of
-template<class _CharT, class _SizeT, class _Traits, _SizeT __npos>
-inline _SizeT _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-__str_find_first_not_of(const _CharT *__p, _SizeT __sz,
-                    const _CharT* __s, _SizeT __pos, _SizeT __n) _NOEXCEPT
-{
-    if (__pos < __sz)
-    {
-        const _CharT* __pe = __p + __sz;
-        for (const _CharT* __ps = __p + __pos; __ps != __pe; ++__ps)
-            if (_Traits::find(__s, __n, *__ps) == 0)
-                return static_cast<_SizeT>(__ps - __p);
-    }
-    return __npos;
-}
-
-
-template<class _CharT, class _SizeT, class _Traits, _SizeT __npos>
-inline _SizeT _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-__str_find_first_not_of(const _CharT *__p, _SizeT __sz,
-                          _CharT __c, _SizeT __pos) _NOEXCEPT
-{
-    if (__pos < __sz)
-    {
-        const _CharT* __pe = __p + __sz;
-        for (const _CharT* __ps = __p + __pos; __ps != __pe; ++__ps)
-            if (!_Traits::eq(*__ps, __c))
-                return static_cast<_SizeT>(__ps - __p);
-    }
-    return __npos;
-}
-
-
-// __str_find_last_not_of
-template<class _CharT, class _SizeT, class _Traits, _SizeT __npos>
-inline _SizeT _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-__str_find_last_not_of(const _CharT *__p, _SizeT __sz,
-                   const _CharT* __s, _SizeT __pos, _SizeT __n) _NOEXCEPT
-{
-    if (__pos < __sz)
-        ++__pos;
-    else
-        __pos = __sz;
-    for (const _CharT* __ps = __p + __pos; __ps != __p;)
-        if (_Traits::find(__s, __n, *--__ps) == 0)
-            return static_cast<_SizeT>(__ps - __p);
-    return __npos;
-}
-
-
-template<class _CharT, class _SizeT, class _Traits, _SizeT __npos>
-inline _SizeT _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
-__str_find_last_not_of(const _CharT *__p, _SizeT __sz,
-                         _CharT __c, _SizeT __pos) _NOEXCEPT
-{
-    if (__pos < __sz)
-        ++__pos;
-    else
-        __pos = __sz;
-    for (const _CharT* __ps = __p + __pos; __ps != __p;)
-        if (!_Traits::eq(*--__ps, __c))
-            return static_cast<_SizeT>(__ps - __p);
-    return __npos;
-}
-
-template<class _Ptr>
-inline _LIBCPP_INLINE_VISIBILITY
-size_t __do_string_hash(_Ptr __p, _Ptr __e)
-{
-    typedef typename iterator_traits<_Ptr>::value_type value_type;
-    return __murmur2_or_cityhash<size_t>()(__p, (__e-__p)*sizeof(value_type));
-}
-
-template <class _CharT, class _Iter, class _Traits=char_traits<_CharT> >
-struct __quoted_output_proxy
-{
-    _Iter  __first;
-    _Iter  __last;
-    _CharT  __delim;
-    _CharT  __escape;
-
-    __quoted_output_proxy(_Iter __f, _Iter __l, _CharT __d, _CharT __e)
-    : __first(__f), __last(__l), __delim(__d), __escape(__e) {}
-    //  This would be a nice place for a string_ref
-};
-
-_LIBCPP_END_NAMESPACE_STD
-
-_LIBCPP_POP_MACROS
-
-#endif  // _LIBCPP___STRING
diff --git a/gnu/llvm/libcxx/include/__support/ibm/limits.h b/gnu/llvm/libcxx/include/__support/ibm/limits.h
deleted file mode 100644
index 45f1f1e3684..00000000000
--- a/gnu/llvm/libcxx/include/__support/ibm/limits.h
+++ /dev/null
@@ -1,98 +0,0 @@
-// -*- C++ -*-
-//===-----------------------------------------------------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef _LIBCPP_SUPPORT_IBM_LIMITS_H
-#define _LIBCPP_SUPPORT_IBM_LIMITS_H
-
-#if !defined(_AIX) // Linux
-#include <math.h> // for HUGE_VAL, HUGE_VALF, HUGE_VALL, and NAN
-
-static const unsigned int _QNAN_F = 0x7fc00000;
-#define NANF (*((float *)(&_QNAN_F)))
-static const unsigned int _QNAN_LDBL128[4] = {0x7ff80000, 0x0, 0x0, 0x0};
-#define NANL (*((long double *)(&_QNAN_LDBL128)))
-static const unsigned int _SNAN_F= 0x7f855555;
-#define NANSF (*((float *)(&_SNAN_F)))
-static const unsigned int _SNAN_D[2] = {0x7ff55555, 0x55555555};
-#define NANS (*((double *)(&_SNAN_D)))
-static const unsigned int _SNAN_LDBL128[4] = {0x7ff55555, 0x55555555, 0x0, 0x0};
-#define NANSL (*((long double *)(&_SNAN_LDBL128)))
-
-#define __builtin_huge_val()     HUGE_VAL
-#define __builtin_huge_valf()    HUGE_VALF
-#define __builtin_huge_vall()    HUGE_VALL
-#define __builtin_nan(__dummy)   NAN
-#define __builtin_nanf(__dummy)  NANF
-#define __builtin_nanl(__dummy)  NANL
-#define __builtin_nans(__dummy)  NANS
-#define __builtin_nansf(__dummy) NANSF
-#define __builtin_nansl(__dummy) NANSL
-
-#else
-
-#include <math.h>
-#include <float.h> // limit constants
-
-#define __builtin_huge_val()     HUGE_VAL  //0x7ff0000000000000
-#define __builtin_huge_valf()    HUGE_VALF //0x7f800000
-#define __builtin_huge_vall()    HUGE_VALL //0x7ff0000000000000
-#define __builtin_nan(__dummy)   nan(__dummy) //0x7ff8000000000000
-#define __builtin_nanf(__dummy)  nanf(__dummy) // 0x7ff80000
-#define __builtin_nanl(__dummy)  nanl(__dummy) //0x7ff8000000000000
-#define __builtin_nans(__dummy)  DBL_SNAN //0x7ff5555555555555
-#define __builtin_nansf(__dummy) FLT_SNAN //0x7f855555
-#define __builtin_nansl(__dummy) DBL_SNAN //0x7ff5555555555555
-
-#define __FLT_MANT_DIG__   FLT_MANT_DIG
-#define __FLT_DIG__        FLT_DIG
-#define __FLT_RADIX__      FLT_RADIX
-#define __FLT_MIN_EXP__    FLT_MIN_EXP
-#define __FLT_MIN_10_EXP__ FLT_MIN_10_EXP
-#define __FLT_MAX_EXP__    FLT_MAX_EXP
-#define __FLT_MAX_10_EXP__ FLT_MAX_10_EXP
-#define __FLT_MIN__        FLT_MIN
-#define __FLT_MAX__        FLT_MAX
-#define __FLT_EPSILON__    FLT_EPSILON
-// predefined by XLC on LoP
-#define __FLT_DENORM_MIN__ 1.40129846e-45F
-
-#define __DBL_MANT_DIG__   DBL_MANT_DIG
-#define __DBL_DIG__        DBL_DIG
-#define __DBL_MIN_EXP__    DBL_MIN_EXP
-#define __DBL_MIN_10_EXP__ DBL_MIN_10_EXP
-#define __DBL_MAX_EXP__    DBL_MAX_EXP
-#define __DBL_MAX_10_EXP__ DBL_MAX_10_EXP
-#define __DBL_MIN__        DBL_MIN
-#define __DBL_MAX__        DBL_MAX
-#define __DBL_EPSILON__    DBL_EPSILON
-// predefined by XLC on LoP
-#define __DBL_DENORM_MIN__ 4.9406564584124654e-324
-
-#define __LDBL_MANT_DIG__   LDBL_MANT_DIG
-#define __LDBL_DIG__        LDBL_DIG
-#define __LDBL_MIN_EXP__    LDBL_MIN_EXP
-#define __LDBL_MIN_10_EXP__ LDBL_MIN_10_EXP
-#define __LDBL_MAX_EXP__    LDBL_MAX_EXP
-#define __LDBL_MAX_10_EXP__ LDBL_MAX_10_EXP
-#define __LDBL_MIN__        LDBL_MIN
-#define __LDBL_MAX__        LDBL_MAX
-#define __LDBL_EPSILON__    LDBL_EPSILON
-// predefined by XLC on LoP
-#if __LONGDOUBLE128
-#define __LDBL_DENORM_MIN__ 4.94065645841246544176568792868221e-324L
-#else
-#define __LDBL_DENORM_MIN__ 4.9406564584124654e-324L
-#endif
-
-// predefined by XLC on LoP
-#define __CHAR_BIT__    8
-
-#endif // _AIX
-
-#endif // _LIBCPP_SUPPORT_IBM_LIMITS_H
diff --git a/gnu/llvm/libcxx/include/__support/ibm/locale_mgmt_aix.h b/gnu/llvm/libcxx/include/__support/ibm/locale_mgmt_aix.h
deleted file mode 100644
index 4f658c3eee3..00000000000
--- a/gnu/llvm/libcxx/include/__support/ibm/locale_mgmt_aix.h
+++ /dev/null
@@ -1,84 +0,0 @@
-// -*- C++ -*-
-//===-----------------------------------------------------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef _LIBCPP_SUPPORT_IBM_LOCALE_MGMT_AIX_H
-#define _LIBCPP_SUPPORT_IBM_LOCALE_MGMT_AIX_H
-
-#if defined(_AIX)
-#include "cstdlib"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#if !defined(_AIX71)
-// AIX 7.1 and higher has these definitions.  Definitions and stubs
-// are provied here as a temporary workaround on AIX 6.1.
-
-#define LC_COLLATE_MASK         1
-#define LC_CTYPE_MASK           2
-#define LC_MESSAGES_MASK        4
-#define LC_MONETARY_MASK        8
-#define LC_NUMERIC_MASK         16
-#define LC_TIME_MASK            32
-#define LC_ALL_MASK             (LC_COLLATE_MASK | LC_CTYPE_MASK | \
-                                 LC_MESSAGES_MASK | LC_MONETARY_MASK |\
-                                 LC_NUMERIC_MASK | LC_TIME_MASK)
-
-typedef void* locale_t;
-
-// The following are stubs.  They are not supported on AIX 6.1.
-static inline
-locale_t newlocale(int category_mask, const char *locale, locale_t base)
-{
-  _LC_locale_t *newloc, *loc;
-  if ((loc = (_LC_locale_t *)__xopen_locale(locale)) == NULL)
-  {
-    errno = EINVAL;
-    return (locale_t)0;
-  }
-  if ((newloc = (_LC_locale_t *)calloc(1, sizeof(_LC_locale_t))) == NULL)
-  {
-    errno = ENOMEM;
-    return (locale_t)0;
-  }
-  if (!base)
-    base = (_LC_locale_t *)__xopen_locale("C");
-  memcpy(newloc, base, sizeof (_LC_locale_t));
-  if (category_mask & LC_COLLATE_MASK)
-    newloc->lc_collate = loc->lc_collate;
-  if (category_mask & LC_CTYPE_MASK)
-    newloc->lc_ctype = loc->lc_ctype;
-  //if (category_mask & LC_MESSAGES_MASK)
-  //  newloc->lc_messages = loc->lc_messages;
-  if (category_mask & LC_MONETARY_MASK)
-    newloc->lc_monetary = loc->lc_monetary;
-  if (category_mask & LC_TIME_MASK)
-    newloc->lc_time = loc->lc_time;
-  if (category_mask & LC_NUMERIC_MASK)
-    newloc->lc_numeric = loc->lc_numeric;
-  return (locale_t)newloc;
-}
-static inline
-void freelocale(locale_t locobj)
-{
-  free(locobj);
-}
-static inline
-locale_t uselocale(locale_t newloc)
-{
-  return (locale_t)0;
-}
-#endif // !defined(_AIX71)
-
-#ifdef __cplusplus
-}
-#endif
-#endif // defined(_AIX)
-#endif // _LIBCPP_SUPPORT_IBM_LOCALE_MGMT_AIX_H
diff --git a/gnu/llvm/libcxx/include/__support/ibm/support.h b/gnu/llvm/libcxx/include/__support/ibm/support.h
deleted file mode 100644
index a7751b01766..00000000000
--- a/gnu/llvm/libcxx/include/__support/ibm/support.h
+++ /dev/null
@@ -1,53 +0,0 @@
-// -*- C++ -*-
-//===-----------------------------------------------------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef _LIBCPP_SUPPORT_IBM_SUPPORT_H
-#define _LIBCPP_SUPPORT_IBM_SUPPORT_H
-
-extern "builtin" int __popcnt4(unsigned int);
-extern "builtin" int __popcnt8(unsigned long long);
-extern "builtin" unsigned int __cnttz4(unsigned int);
-extern "builtin" unsigned int __cnttz8(unsigned long long);
-extern "builtin" unsigned int __cntlz4(unsigned int);
-extern "builtin" unsigned int __cntlz8(unsigned long long);
-
-// Builtin functions for counting population
-#define __builtin_popcount(x) __popcnt4(x)
-#define __builtin_popcountll(x) __popcnt8(x)
-#if defined(__64BIT__)
-#define __builtin_popcountl(x) __builtin_popcountll(x)
-#else
-#define __builtin_popcountl(x) __builtin_popcount(x)
-#endif
-
-// Builtin functions for counting trailing zeros
-#define __builtin_ctz(x) __cnttz4(x)
-#define __builtin_ctzll(x) __cnttz8(x)
-#if defined(__64BIT__)
-#define __builtin_ctzl(x) __builtin_ctzll(x)
-#else
-#define __builtin_ctzl(x) __builtin_ctz(x)
-#endif
-
-// Builtin functions for counting leading zeros
-#define __builtin_clz(x) __cntlz4(x)
-#define __builtin_clzll(x) __cntlz8(x)
-#if defined(__64BIT__)
-#define __builtin_clzl(x) __builtin_clzll(x)
-#else
-#define __builtin_clzl(x) __builtin_clz(x)
-#endif
-
-#if defined(__64BIT__)
-#define __SIZE_WIDTH__ 64
-#else
-#define __SIZE_WIDTH__ 32
-#endif
-
-#endif // _LIBCPP_SUPPORT_IBM_SUPPORT_H
diff --git a/gnu/llvm/libcxx/include/__support/nuttx/xlocale.h b/gnu/llvm/libcxx/include/__support/nuttx/xlocale.h
deleted file mode 100644
index be738e3b64e..00000000000
--- a/gnu/llvm/libcxx/include/__support/nuttx/xlocale.h
+++ /dev/null
@@ -1,18 +0,0 @@
-// -*- C++ -*-
-//===-----------------------------------------------------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef _LIBCPP_SUPPORT_NUTTX_XLOCALE_H
-#define _LIBCPP_SUPPORT_NUTTX_XLOCALE_H
-
-#if defined(__NuttX__)
-#include <__support/xlocale/__posix_l_fallback.h>
-#include <__support/xlocale/__strtonum_fallback.h>
-#endif // __NuttX__
-
-#endif
diff --git a/gnu/llvm/libcxx/include/__support/win32/limits_msvc_win32.h b/gnu/llvm/libcxx/include/__support/win32/limits_msvc_win32.h
deleted file mode 100644
index c80df6693ce..00000000000
--- a/gnu/llvm/libcxx/include/__support/win32/limits_msvc_win32.h
+++ /dev/null
@@ -1,71 +0,0 @@
-// -*- C++ -*-
-//===-----------------------------------------------------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef _LIBCPP_SUPPORT_WIN32_LIMITS_MSVC_WIN32_H
-#define _LIBCPP_SUPPORT_WIN32_LIMITS_MSVC_WIN32_H
-
-#if !defined(_LIBCPP_MSVCRT)
-#error "This header complements the Microsoft C Runtime library, and should not be included otherwise."
-#endif
-#if defined(__clang__)
-#error "This header should only be included when using Microsofts C1XX frontend"
-#endif
-
-#include <float.h> // limit constants
-#include <limits.h> // CHAR_BIT
-#include <math.h> // HUGE_VAL
-#include <ymath.h> // internal MSVC header providing the needed functionality
-
-#define __CHAR_BIT__       CHAR_BIT
-
-#define __FLT_MANT_DIG__   FLT_MANT_DIG
-#define __FLT_DIG__        FLT_DIG
-#define __FLT_RADIX__      FLT_RADIX
-#define __FLT_MIN_EXP__    FLT_MIN_EXP
-#define __FLT_MIN_10_EXP__ FLT_MIN_10_EXP
-#define __FLT_MAX_EXP__    FLT_MAX_EXP
-#define __FLT_MAX_10_EXP__ FLT_MAX_10_EXP
-#define __FLT_MIN__        FLT_MIN
-#define __FLT_MAX__        FLT_MAX
-#define __FLT_EPSILON__    FLT_EPSILON
-// predefined by MinGW GCC
-#define __FLT_DENORM_MIN__ 1.40129846432481707092e-45F
-
-#define __DBL_MANT_DIG__   DBL_MANT_DIG
-#define __DBL_DIG__        DBL_DIG
-#define __DBL_RADIX__      DBL_RADIX
-#define __DBL_MIN_EXP__    DBL_MIN_EXP
-#define __DBL_MIN_10_EXP__ DBL_MIN_10_EXP
-#define __DBL_MAX_EXP__    DBL_MAX_EXP
-#define __DBL_MAX_10_EXP__ DBL_MAX_10_EXP
-#define __DBL_MIN__        DBL_MIN
-#define __DBL_MAX__        DBL_MAX
-#define __DBL_EPSILON__    DBL_EPSILON
-// predefined by MinGW GCC
-#define __DBL_DENORM_MIN__ double(4.94065645841246544177e-324L)
-
-#define __LDBL_MANT_DIG__   LDBL_MANT_DIG
-#define __LDBL_DIG__        LDBL_DIG
-#define __LDBL_RADIX__      LDBL_RADIX
-#define __LDBL_MIN_EXP__    LDBL_MIN_EXP
-#define __LDBL_MIN_10_EXP__ LDBL_MIN_10_EXP
-#define __LDBL_MAX_EXP__    LDBL_MAX_EXP
-#define __LDBL_MAX_10_EXP__ LDBL_MAX_10_EXP
-#define __LDBL_MIN__        LDBL_MIN
-#define __LDBL_MAX__        LDBL_MAX
-#define __LDBL_EPSILON__    LDBL_EPSILON
-// predefined by MinGW GCC
-#define __LDBL_DENORM_MIN__ 3.64519953188247460253e-4951L
-
-// __builtin replacements/workarounds
-#define __builtin_huge_vall()    _LInf._Long_double
-#define __builtin_nanl(__dummmy) _LNan._Long_double
-#define __builtin_nansl(__dummy) _LSnan._Long_double
-
-#endif // _LIBCPP_SUPPORT_WIN32_LIMITS_MSVC_WIN32_H
diff --git a/gnu/llvm/libcxx/include/__tuple b/gnu/llvm/libcxx/include/__tuple
deleted file mode 100644
index 4da9ec55f35..00000000000
--- a/gnu/llvm/libcxx/include/__tuple
+++ /dev/null
@@ -1,551 +0,0 @@
-// -*- C++ -*-
-//===----------------------------------------------------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef _LIBCPP___TUPLE
-#define _LIBCPP___TUPLE
-
-#include <__config>
-#include <cstddef>
-#include <type_traits>
-
-#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
-#endif
-
-
-_LIBCPP_BEGIN_NAMESPACE_STD
-
-template <class _Tp> struct _LIBCPP_TEMPLATE_VIS tuple_size;
-
-#if !defined(_LIBCPP_CXX03_LANG)
-template <class _Tp, class...>
-using __enable_if_tuple_size_imp = _Tp;
-
-template <class _Tp>
-struct _LIBCPP_TEMPLATE_VIS tuple_size<__enable_if_tuple_size_imp<
-    const _Tp,
-    typename enable_if<!is_volatile<_Tp>::value>::type,
-    integral_constant<size_t, sizeof(tuple_size<_Tp>)>>>
-    : public integral_constant<size_t, tuple_size<_Tp>::value> {};
-
-template <class _Tp>
-struct _LIBCPP_TEMPLATE_VIS tuple_size<__enable_if_tuple_size_imp<
-    volatile _Tp,
-    typename enable_if<!is_const<_Tp>::value>::type,
-    integral_constant<size_t, sizeof(tuple_size<_Tp>)>>>
-    : public integral_constant<size_t, tuple_size<_Tp>::value> {};
-
-template <class _Tp>
-struct _LIBCPP_TEMPLATE_VIS tuple_size<__enable_if_tuple_size_imp<
-    const volatile _Tp,
-    integral_constant<size_t, sizeof(tuple_size<_Tp>)>>>
-    : public integral_constant<size_t, tuple_size<_Tp>::value> {};
-
-#else
-template <class _Tp> struct _LIBCPP_TEMPLATE_VIS tuple_size<const _Tp> : public tuple_size<_Tp> {};
-template <class _Tp> struct _LIBCPP_TEMPLATE_VIS tuple_size<volatile _Tp> : public tuple_size<_Tp> {};
-template <class _Tp> struct _LIBCPP_TEMPLATE_VIS tuple_size<const volatile _Tp> : public tuple_size<_Tp> {};
-#endif
-
-template <size_t _Ip, class _Tp> struct _LIBCPP_TEMPLATE_VIS tuple_element;
-
-template <size_t _Ip, class _Tp>
-struct _LIBCPP_TEMPLATE_VIS tuple_element<_Ip, const _Tp>
-{
-    typedef _LIBCPP_NODEBUG_TYPE typename add_const<typename tuple_element<_Ip, _Tp>::type>::type type;
-};
-
-template <size_t _Ip, class _Tp>
-struct _LIBCPP_TEMPLATE_VIS tuple_element<_Ip, volatile _Tp>
-{
-    typedef _LIBCPP_NODEBUG_TYPE typename add_volatile<typename tuple_element<_Ip, _Tp>::type>::type type;
-};
-
-template <size_t _Ip, class _Tp>
-struct _LIBCPP_TEMPLATE_VIS tuple_element<_Ip, const volatile _Tp>
-{
-    typedef _LIBCPP_NODEBUG_TYPE typename add_cv<typename tuple_element<_Ip, _Tp>::type>::type type;
-};
-
-template <class _Tp> struct __tuple_like : false_type {};
-
-template <class _Tp> struct __tuple_like<const _Tp> : public __tuple_like<_Tp> {};
-template <class _Tp> struct __tuple_like<volatile _Tp> : public __tuple_like<_Tp> {};
-template <class _Tp> struct __tuple_like<const volatile _Tp> : public __tuple_like<_Tp> {};
-
-// tuple specializations
-
-#ifndef _LIBCPP_CXX03_LANG
-
-template <size_t...> struct __tuple_indices {};
-
-template <class _IdxType, _IdxType... _Values>
-struct __integer_sequence {
-  template <template <class _OIdxType, _OIdxType...> class _ToIndexSeq, class _ToIndexType>
-  using __convert = _ToIndexSeq<_ToIndexType, _Values...>;
-
-  template <size_t _Sp>
-  using __to_tuple_indices = __tuple_indices<(_Values + _Sp)...>;
-};
-
-#if !__has_builtin(__make_integer_seq) || defined(_LIBCPP_TESTING_FALLBACK_MAKE_INTEGER_SEQUENCE)
-namespace __detail {
-
-template<typename _Tp, size_t ..._Extra> struct __repeat;
-template<typename _Tp, _Tp ..._Np, size_t ..._Extra> struct __repeat<__integer_sequence<_Tp, _Np...>, _Extra...> {
-  typedef _LIBCPP_NODEBUG_TYPE __integer_sequence<_Tp,
-                           _Np...,
-                           sizeof...(_Np) + _Np...,
-                           2 * sizeof...(_Np) + _Np...,
-                           3 * sizeof...(_Np) + _Np...,
-                           4 * sizeof...(_Np) + _Np...,
-                           5 * sizeof...(_Np) + _Np...,
-                           6 * sizeof...(_Np) + _Np...,
-                           7 * sizeof...(_Np) + _Np...,
-                           _Extra...> type;
-};
-
-template<size_t _Np> struct __parity;
-template<size_t _Np> struct __make : __parity<_Np % 8>::template __pmake<_Np> {};
-
-template<> struct __make<0> { typedef __integer_sequence<size_t> type; };
-template<> struct __make<1> { typedef __integer_sequence<size_t, 0> type; };
-template<> struct __make<2> { typedef __integer_sequence<size_t, 0, 1> type; };
-template<> struct __make<3> { typedef __integer_sequence<size_t, 0, 1, 2> type; };
-template<> struct __make<4> { typedef __integer_sequence<size_t, 0, 1, 2, 3> type; };
-template<> struct __make<5> { typedef __integer_sequence<size_t, 0, 1, 2, 3, 4> type; };
-template<> struct __make<6> { typedef __integer_sequence<size_t, 0, 1, 2, 3, 4, 5> type; };
-template<> struct __make<7> { typedef __integer_sequence<size_t, 0, 1, 2, 3, 4, 5, 6> type; };
-
-template<> struct __parity<0> { template<size_t _Np> struct __pmake : __repeat<typename __make<_Np / 8>::type> {}; };
-template<> struct __parity<1> { template<size_t _Np> struct __pmake : __repeat<typename __make<_Np / 8>::type, _Np - 1> {}; };
-template<> struct __parity<2> { template<size_t _Np> struct __pmake : __repeat<typename __make<_Np / 8>::type, _Np - 2, _Np - 1> {}; };
-template<> struct __parity<3> { template<size_t _Np> struct __pmake : __repeat<typename __make<_Np / 8>::type, _Np - 3, _Np - 2, _Np - 1> {}; };
-template<> struct __parity<4> { template<size_t _Np> struct __pmake : __repeat<typename __make<_Np / 8>::type, _Np - 4, _Np - 3, _Np - 2, _Np - 1> {}; };
-template<> struct __parity<5> { template<size_t _Np> struct __pmake : __repeat<typename __make<_Np / 8>::type, _Np - 5, _Np - 4, _Np - 3, _Np - 2, _Np - 1> {}; };
-template<> struct __parity<6> { template<size_t _Np> struct __pmake : __repeat<typename __make<_Np / 8>::type, _Np - 6, _Np - 5, _Np - 4, _Np - 3, _Np - 2, _Np - 1> {}; };
-template<> struct __parity<7> { template<size_t _Np> struct __pmake : __repeat<typename __make<_Np / 8>::type, _Np - 7, _Np - 6, _Np - 5, _Np - 4, _Np - 3, _Np - 2, _Np - 1> {}; };
-
-} // namespace detail
-
-#endif  // !__has_builtin(__make_integer_seq) || defined(_LIBCPP_TESTING_FALLBACK_MAKE_INTEGER_SEQUENCE)
-
-#if __has_builtin(__make_integer_seq)
-template <size_t _Ep, size_t _Sp>
-using __make_indices_imp =
-    typename __make_integer_seq<__integer_sequence, size_t, _Ep - _Sp>::template
-    __to_tuple_indices<_Sp>;
-#else
-template <size_t _Ep, size_t _Sp>
-using __make_indices_imp =
-    typename __detail::__make<_Ep - _Sp>::type::template __to_tuple_indices<_Sp>;
-
-#endif
-
-template <size_t _Ep, size_t _Sp = 0>
-struct __make_tuple_indices
-{
-    static_assert(_Sp <= _Ep, "__make_tuple_indices input error");
-    typedef __make_indices_imp<_Ep, _Sp> type;
-};
-
-
-template <class ..._Tp> class _LIBCPP_TEMPLATE_VIS tuple;
-
-template <class... _Tp> struct __tuple_like<tuple<_Tp...> > : true_type {};
-
-template <class ..._Tp>
-struct _LIBCPP_TEMPLATE_VIS tuple_size<tuple<_Tp...> >
-    : public integral_constant<size_t, sizeof...(_Tp)>
-{
-};
-
-template <size_t _Ip, class ..._Tp>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
-typename tuple_element<_Ip, tuple<_Tp...> >::type&
-get(tuple<_Tp...>&) _NOEXCEPT;
-
-template <size_t _Ip, class ..._Tp>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
-const typename tuple_element<_Ip, tuple<_Tp...> >::type&
-get(const tuple<_Tp...>&) _NOEXCEPT;
-
-template <size_t _Ip, class ..._Tp>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
-typename tuple_element<_Ip, tuple<_Tp...> >::type&&
-get(tuple<_Tp...>&&) _NOEXCEPT;
-
-template <size_t _Ip, class ..._Tp>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
-const typename tuple_element<_Ip, tuple<_Tp...> >::type&&
-get(const tuple<_Tp...>&&) _NOEXCEPT;
-
-#endif // !defined(_LIBCPP_CXX03_LANG)
-
-// pair specializations
-
-template <class _T1, class _T2> struct __tuple_like<pair<_T1, _T2> > : true_type {};
-
-template <size_t _Ip, class _T1, class _T2>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
-typename tuple_element<_Ip, pair<_T1, _T2> >::type&
-get(pair<_T1, _T2>&) _NOEXCEPT;
-
-template <size_t _Ip, class _T1, class _T2>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
-const typename tuple_element<_Ip, pair<_T1, _T2> >::type&
-get(const pair<_T1, _T2>&) _NOEXCEPT;
-
-#ifndef _LIBCPP_CXX03_LANG
-template <size_t _Ip, class _T1, class _T2>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
-typename tuple_element<_Ip, pair<_T1, _T2> >::type&&
-get(pair<_T1, _T2>&&) _NOEXCEPT;
-
-template <size_t _Ip, class _T1, class _T2>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
-const typename tuple_element<_Ip, pair<_T1, _T2> >::type&&
-get(const pair<_T1, _T2>&&) _NOEXCEPT;
-#endif
-
-// array specializations
-
-template <class _Tp, size_t _Size> struct _LIBCPP_TEMPLATE_VIS array;
-
-template <class _Tp, size_t _Size> struct __tuple_like<array<_Tp, _Size> > : true_type {};
-
-template <size_t _Ip, class _Tp, size_t _Size>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
-_Tp&
-get(array<_Tp, _Size>&) _NOEXCEPT;
-
-template <size_t _Ip, class _Tp, size_t _Size>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
-const _Tp&
-get(const array<_Tp, _Size>&) _NOEXCEPT;
-
-#ifndef _LIBCPP_CXX03_LANG
-template <size_t _Ip, class _Tp, size_t _Size>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
-_Tp&&
-get(array<_Tp, _Size>&&) _NOEXCEPT;
-
-template <size_t _Ip, class _Tp, size_t _Size>
-_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
-const _Tp&&
-get(const array<_Tp, _Size>&&) _NOEXCEPT;
-#endif
-
-#ifndef _LIBCPP_CXX03_LANG
-
-// __tuple_types
-
-template <class ..._Tp> struct __tuple_types {};
-
-#if !__has_builtin(__type_pack_element)
-
-namespace __indexer_detail {
-
-template <size_t _Idx, class _Tp>
-struct __indexed { using type _LIBCPP_NODEBUG_TYPE = _Tp; };
-
-template <class _Types, class _Indexes> struct __indexer;
-
-template <class ..._Types, size_t ..._Idx>
-struct __indexer<__tuple_types<_Types...>, __tuple_indices<_Idx...>>
-    : __indexed<_Idx, _Types>...
-{};
-
-template <size_t _Idx, class _Tp>
-__indexed<_Idx, _Tp> __at_index(__indexed<_Idx, _Tp> const&);
-
-} // namespace __indexer_detail
-
-template <size_t _Idx, class ..._Types>
-using __type_pack_element _LIBCPP_NODEBUG_TYPE = typename decltype(
-    __indexer_detail::__at_index<_Idx>(
-        __indexer_detail::__indexer<
-            __tuple_types<_Types...>,
-            typename __make_tuple_indices<sizeof...(_Types)>::type
-        >{})
-  )::type;
-#endif
-
-template <size_t _Ip, class ..._Types>
-struct _LIBCPP_TEMPLATE_VIS tuple_element<_Ip, __tuple_types<_Types...>>
-{
-    static_assert(_Ip < sizeof...(_Types), "tuple_element index out of range");
-    typedef _LIBCPP_NODEBUG_TYPE __type_pack_element<_Ip, _Types...> type;
-};
-
-
-template <class ..._Tp>
-struct _LIBCPP_TEMPLATE_VIS tuple_size<__tuple_types<_Tp...> >
-    : public integral_constant<size_t, sizeof...(_Tp)>
-{
-};
-
-template <class... _Tp> struct __tuple_like<__tuple_types<_Tp...> > : true_type {};
-
-template <bool _ApplyLV, bool _ApplyConst, bool _ApplyVolatile>
-struct __apply_cv_mf;
-template <>
-struct __apply_cv_mf<false, false, false> {
-  template <class _Tp> using __apply = _Tp;
-};
-template <>
-struct __apply_cv_mf<false, true, false> {
-  template <class _Tp> using __apply _LIBCPP_NODEBUG_TYPE  = const _Tp;
-};
-template <>
-struct __apply_cv_mf<false, false, true> {
-  template <class _Tp> using __apply _LIBCPP_NODEBUG_TYPE  = volatile _Tp;
-};
-template <>
-struct __apply_cv_mf<false, true, true> {
-  template <class _Tp> using __apply _LIBCPP_NODEBUG_TYPE  = const volatile _Tp;
-};
-template <>
-struct __apply_cv_mf<true, false, false> {
-  template <class _Tp> using __apply _LIBCPP_NODEBUG_TYPE  = _Tp&;
-};
-template <>
-struct __apply_cv_mf<true, true, false> {
-  template <class _Tp> using __apply _LIBCPP_NODEBUG_TYPE  = const _Tp&;
-};
-template <>
-struct __apply_cv_mf<true, false, true> {
-  template <class _Tp> using __apply _LIBCPP_NODEBUG_TYPE  = volatile _Tp&;
-};
-template <>
-struct __apply_cv_mf<true, true, true> {
-  template <class _Tp> using __apply _LIBCPP_NODEBUG_TYPE = const volatile _Tp&;
-};
-template <class _Tp, class _RawTp = typename remove_reference<_Tp>::type>
-using __apply_cv_t _LIBCPP_NODEBUG_TYPE  = __apply_cv_mf<
-    is_lvalue_reference<_Tp>::value,
-    is_const<_RawTp>::value,
-    is_volatile<_RawTp>::value>;
-
-// __make_tuple_types
-
-// __make_tuple_types<_Tuple<_Types...>, _Ep, _Sp>::type is a
-// __tuple_types<_Types...> using only those _Types in the range [_Sp, _Ep).
-// _Sp defaults to 0 and _Ep defaults to tuple_size<_Tuple>.  If _Tuple is a
-// lvalue_reference type, then __tuple_types<_Types&...> is the result.
-
-template <class _TupleTypes, class _TupleIndices>
-struct __make_tuple_types_flat;
-
-template <template <class...> class _Tuple, class ..._Types, size_t ..._Idx>
-struct __make_tuple_types_flat<_Tuple<_Types...>, __tuple_indices<_Idx...>> {
-  // Specialization for pair, tuple, and __tuple_types
-  template <class _Tp, class _ApplyFn = __apply_cv_t<_Tp>>
-  using __apply_quals _LIBCPP_NODEBUG_TYPE = __tuple_types<
-      typename _ApplyFn::template __apply<__type_pack_element<_Idx, _Types...>>...
-    >;
-};
-
-template <class _Vt, size_t _Np, size_t ..._Idx>
-struct __make_tuple_types_flat<array<_Vt, _Np>, __tuple_indices<_Idx...>> {
-  template <size_t>
-  using __value_type = _Vt;
-  template <class _Tp, class _ApplyFn = __apply_cv_t<_Tp>>
-  using __apply_quals = __tuple_types<
-      typename _ApplyFn::template __apply<__value_type<_Idx>>...
-    >;
-};
-
-template <class _Tp, size_t _Ep = tuple_size<typename remove_reference<_Tp>::type>::value,
-          size_t _Sp = 0,
-          bool _SameSize = (_Ep == tuple_size<typename remove_reference<_Tp>::type>::value)>
-struct __make_tuple_types
-{
-    static_assert(_Sp <= _Ep, "__make_tuple_types input error");
-    using _RawTp = typename remove_cv<typename remove_reference<_Tp>::type>::type;
-    using _Maker = __make_tuple_types_flat<_RawTp, typename __make_tuple_indices<_Ep, _Sp>::type>;
-    using type = typename _Maker::template __apply_quals<_Tp>;
-};
-
-template <class ..._Types, size_t _Ep>
-struct __make_tuple_types<tuple<_Types...>, _Ep, 0, true> {
-  typedef _LIBCPP_NODEBUG_TYPE __tuple_types<_Types...> type;
-};
-
-template <class ..._Types, size_t _Ep>
-struct __make_tuple_types<__tuple_types<_Types...>, _Ep, 0, true> {
-  typedef _LIBCPP_NODEBUG_TYPE __tuple_types<_Types...> type;
-};
-
-template <bool ..._Preds>
-struct __all_dummy;
-
-template <bool ..._Pred>
-using __all = _IsSame<__all_dummy<_Pred...>, __all_dummy<((void)_Pred, true)...>>;
-
-struct __tuple_sfinae_base {
-  template <template <class, class...> class _Trait,
-            class ..._LArgs, class ..._RArgs>
-  static auto __do_test(__tuple_types<_LArgs...>, __tuple_types<_RArgs...>)
-    -> __all<typename enable_if<_Trait<_LArgs, _RArgs>::value, bool>::type{true}...>;
-  template <template <class...> class>
-  static auto __do_test(...) -> false_type;
-
-  template <class _FromArgs, class _ToArgs>
-  using __constructible = decltype(__do_test<is_constructible>(_ToArgs{}, _FromArgs{}));
-  template <class _FromArgs, class _ToArgs>
-  using __convertible = decltype(__do_test<is_convertible>(_FromArgs{}, _ToArgs{}));
-  template <class _FromArgs, class _ToArgs>
-  using __assignable = decltype(__do_test<is_assignable>(_ToArgs{}, _FromArgs{}));
-};
-
-// __tuple_convertible
-
-template <class _Tp, class _Up, bool = __tuple_like<typename remove_reference<_Tp>::type>::value,
-                                bool = __tuple_like<_Up>::value>
-struct __tuple_convertible
-    : public false_type {};
-
-template <class _Tp, class _Up>
-struct __tuple_convertible<_Tp, _Up, true, true>
-    : public __tuple_sfinae_base::__convertible<
-      typename __make_tuple_types<_Tp>::type
-    , typename __make_tuple_types<_Up>::type
-    >
-{};
-
-// __tuple_constructible
-
-template <class _Tp, class _Up, bool = __tuple_like<typename remove_reference<_Tp>::type>::value,
-                                bool = __tuple_like<_Up>::value>
-struct __tuple_constructible
-    : public false_type {};
-
-template <class _Tp, class _Up>
-struct __tuple_constructible<_Tp, _Up, true, true>
-    : public __tuple_sfinae_base::__constructible<
-      typename __make_tuple_types<_Tp>::type
-    , typename __make_tuple_types<_Up>::type
-    >
-{};
-
-// __tuple_assignable
-
-template <class _Tp, class _Up, bool = __tuple_like<typename remove_reference<_Tp>::type>::value,
-                                bool = __tuple_like<_Up>::value>
-struct __tuple_assignable
-    : public false_type {};
-
-template <class _Tp, class _Up>
-struct __tuple_assignable<_Tp, _Up, true, true>
-    : public __tuple_sfinae_base::__assignable<
-      typename __make_tuple_types<_Tp>::type
-    , typename __make_tuple_types<_Up&>::type
-    >
-{};
-
-
-template <size_t _Ip, class ..._Tp>
-struct _LIBCPP_TEMPLATE_VIS tuple_element<_Ip, tuple<_Tp...> >
-{
-    typedef _LIBCPP_NODEBUG_TYPE typename tuple_element<_Ip, __tuple_types<_Tp...> >::type type;
-};
-
-#if _LIBCPP_STD_VER > 11
-template <size_t _Ip, class ..._Tp>
-using tuple_element_t _LIBCPP_NODEBUG_TYPE  = typename tuple_element <_Ip, _Tp...>::type;
-#endif
-
-template <bool _IsTuple, class _SizeTrait, size_t _Expected>
-struct __tuple_like_with_size_imp : false_type {};
-
-template <class _SizeTrait, size_t _Expected>
-struct __tuple_like_with_size_imp<true, _SizeTrait, _Expected>
-    : integral_constant<bool, _SizeTrait::value == _Expected> {};
-
-template <class _Tuple, size_t _ExpectedSize,
-          class _RawTuple = typename __uncvref<_Tuple>::type>
-using __tuple_like_with_size _LIBCPP_NODEBUG_TYPE = __tuple_like_with_size_imp<
-                                   __tuple_like<_RawTuple>::value,
-                                   tuple_size<_RawTuple>, _ExpectedSize
-                              >;
-
-struct _LIBCPP_TYPE_VIS __check_tuple_constructor_fail {
-
-    static constexpr bool __enable_explicit_default() { return false; }
-    static constexpr bool __enable_implicit_default() { return false; }
-    template <class ...>
-    static constexpr bool __enable_explicit() { return false; }
-    template <class ...>
-    static constexpr bool __enable_implicit() { return false; }
-    template <class ...>
-    static constexpr bool __enable_assign() { return false; }
-};
-#endif // !defined(_LIBCPP_CXX03_LANG)
-
-#if _LIBCPP_STD_VER > 14
-
-template <bool _CanCopy, bool _CanMove>
-struct __sfinae_ctor_base {};
-template <>
-struct __sfinae_ctor_base<false, false> {
-  __sfinae_ctor_base() = default;
-  __sfinae_ctor_base(__sfinae_ctor_base const&) = delete;
-  __sfinae_ctor_base(__sfinae_ctor_base &&) = delete;
-  __sfinae_ctor_base& operator=(__sfinae_ctor_base const&) = default;
-  __sfinae_ctor_base& operator=(__sfinae_ctor_base&&) = default;
-};
-template <>
-struct __sfinae_ctor_base<true, false> {
-  __sfinae_ctor_base() = default;
-  __sfinae_ctor_base(__sfinae_ctor_base const&) = default;
-  __sfinae_ctor_base(__sfinae_ctor_base &&) = delete;
-  __sfinae_ctor_base& operator=(__sfinae_ctor_base const&) = default;
-  __sfinae_ctor_base& operator=(__sfinae_ctor_base&&) = default;
-};
-template <>
-struct __sfinae_ctor_base<false, true> {
-  __sfinae_ctor_base() = default;
-  __sfinae_ctor_base(__sfinae_ctor_base const&) = delete;
-  __sfinae_ctor_base(__sfinae_ctor_base &&) = default;
-  __sfinae_ctor_base& operator=(__sfinae_ctor_base const&) = default;
-  __sfinae_ctor_base& operator=(__sfinae_ctor_base&&) = default;
-};
-
-template <bool _CanCopy, bool _CanMove>
-struct __sfinae_assign_base {};
-template <>
-struct __sfinae_assign_base<false, false> {
-  __sfinae_assign_base() = default;
-  __sfinae_assign_base(__sfinae_assign_base const&) = default;
-  __sfinae_assign_base(__sfinae_assign_base &&) = default;
-  __sfinae_assign_base& operator=(__sfinae_assign_base const&) = delete;
-  __sfinae_assign_base& operator=(__sfinae_assign_base&&) = delete;
-};
-template <>
-struct __sfinae_assign_base<true, false> {
-  __sfinae_assign_base() = default;
-  __sfinae_assign_base(__sfinae_assign_base const&) = default;
-  __sfinae_assign_base(__sfinae_assign_base &&) = default;
-  __sfinae_assign_base& operator=(__sfinae_assign_base const&) = default;
-  __sfinae_assign_base& operator=(__sfinae_assign_base&&) = delete;
-};
-template <>
-struct __sfinae_assign_base<false, true> {
-  __sfinae_assign_base() = default;
-  __sfinae_assign_base(__sfinae_assign_base const&) = default;
-  __sfinae_assign_base(__sfinae_assign_base &&) = default;
-  __sfinae_assign_base& operator=(__sfinae_assign_base const&) = delete;
-  __sfinae_assign_base& operator=(__sfinae_assign_base&&) = default;
-};
-#endif // _LIBCPP_STD_VER > 14
-
-_LIBCPP_END_NAMESPACE_STD
-
-#endif  // _LIBCPP___TUPLE
diff --git a/gnu/llvm/libcxx/include/__utility/__decay_copy.h b/gnu/llvm/libcxx/include/__utility/__decay_copy.h
deleted file mode 100644
index eda8db6a60f..00000000000
--- a/gnu/llvm/libcxx/include/__utility/__decay_copy.h
+++ /dev/null
@@ -1,39 +0,0 @@
-// -*- C++ -*-
-//===----------------------------------------------------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef _LIBCPP___TYPE_TRAITS_DECAY_COPY_H
-#define _LIBCPP___TYPE_TRAITS_DECAY_COPY_H
-
-#include <__config>
-#include <__utility/forward.h>
-#include <type_traits>
-
-#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
-#endif
-
-_LIBCPP_PUSH_MACROS
-#include <__undef_macros>
-
-_LIBCPP_BEGIN_NAMESPACE_STD
-
-template <class _Tp>
-inline _LIBCPP_INLINE_VISIBILITY typename decay<_Tp>::type __decay_copy(_Tp&& __t)
-#if _LIBCPP_STD_VER > 17
-    noexcept(is_nothrow_convertible_v<_Tp, remove_reference_t<_Tp> >)
-#endif
-{
-  return _VSTD::forward<_Tp>(__t);
-}
-
-_LIBCPP_END_NAMESPACE_STD
-
-_LIBCPP_POP_MACROS
-
-#endif // _LIBCPP___TYPE_TRAITS_DECAY_COPY_H
diff --git a/gnu/llvm/libcxx/include/algorithm b/gnu/llvm/libcxx/include/algorithm
index 60c5cabc078..cb2d27cbc80 100644
--- a/gnu/llvm/libcxx/include/algorithm
+++ b/gnu/llvm/libcxx/include/algorithm
@@ -1,5 +1,5 @@
 // -*- C++ -*-
-//===-------------------------- algorithm ---------------------------------===//
+//===----------------------------------------------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
@@ -19,7 +19,60 @@ namespace std
 {
 
 namespace ranges {
-  template<input_iterator I, sentinel_for<I> S, class T, class Proj = identity>
+
+  // [algorithms.results], algorithm result types
+  template <class I, class F>
+    struct in_fun_result;     // since C++20
+
+  template <class I1, class I2>
+    struct in_in_result;      // since C++20
+
+  template <class I, class O>
+    struct in_out_result;  // since C++20
+
+  template <class I1, class I2, class O>
+    struct in_in_out_result;  // since C++20
+
+  template <class I, class O1, class O2>
+    struct in_out_out_result; // since C++20
+
+  template <class I1, class I2>
+    struct min_max_result;    // since C++20
+
+  template <class I>
+    struct in_found_result;   // since C++20
+
+  template<forward_iterator I, sentinel_for<I> S, class Proj = identity,
+    indirect_strict_weak_order<projected<I, Proj>> Comp = ranges::less>             // since C++20
+  constexpr I min_element(I first, S last, Comp comp = {}, Proj proj = {});
+
+  template<forward_range R, class Proj = identity,
+    indirect_strict_weak_order<projected<iterator_t<R>, Proj>> Comp = ranges::less> // since C++20
+  constexpr borrowed_iterator_t<R> min_element(R&& r, Comp comp = {}, Proj proj = {});
+
+  template<forward_iterator I, sentinel_for<I> S, class Proj = identity,
+    indirect_strict_weak_order<projected<I, Proj>> Comp = ranges::less>
+  constexpr I ranges::max_element(I first, S last, Comp comp = {}, Proj proj = {});                        // since C++20
+
+  template<forward_range R, class Proj = identity,
+    indirect_strict_weak_order<projected<iterator_t<R>, Proj>> Comp = ranges::less>
+  constexpr borrowed_iterator_t<R> ranges::max_element(R&& r, Comp comp = {}, Proj proj = {});             // since C++20
+
+  template<class I1, class I2>
+    using mismatch_result = in_in_result<I1, I2>;
+
+  template <input_iterator I1, sentinel_for<_I1> S1, input_iterator I2, sentinel_for<_I2> S2,
+          class Pred = ranges::equal_to, class Proj1 = identity, class Proj2 = identity>
+    requires indirectly_comparable<I1, I2, Pred, Proj1, Proj2>
+  constexpr mismatch_result<_I1, _I2>
+  mismatch()(I1 first1, S1 last1, I2 first2, S2 last2, Pred pred = {}, Proj1 proj1 = {}, Proj2 proj2 = {}) // since C++20
+
+  template <input_range R1, input_range R2,
+          class Pred = ranges::equal_to, class Proj1 = identity, class Proj2 = identity>
+    requires indirectly_comparable<iterator_t<R1>, iterator_t<R2>, Pred, Proj1, Proj2>
+  constexpr mismatch_result<borrowed_iterator_t<R1>, borrowed_iterator_t<R2>>
+  mismatch(R1&& r1, R2&& r2, Pred pred = {}, Proj1 proj1 = {}, Proj2 proj2 = {})                           // since C++20
+
     requires indirect_binary_predicate<ranges::equal_to, projected<I, Proj>, const T*>
     constexpr I find(I first, S last, const T& value, Proj proj = {});              // since C++20
 
@@ -45,6 +98,958 @@ namespace ranges {
            indirect_unary_predicate<projected<iterator_t<R>, Proj>> Pred>
     constexpr borrowed_iterator_t<R>
       find_if_not(R&& r, Pred pred, Proj proj = {});                                // since C++20
+
+  template<class T, class Proj = identity,
+           indirect_strict_weak_order<projected<const T*, Proj>> Comp = ranges::less>
+    constexpr const T& min(const T& a, const T& b, Comp comp = {}, Proj proj = {}); // since C++20
+
+  template<copyable T, class Proj = identity,
+           indirect_strict_weak_order<projected<const T*, Proj>> Comp = ranges::less>
+    constexpr T min(initializer_list<T> r, Comp comp = {}, Proj proj = {});         // since C++20
+
+ template<input_range R, class Proj = identity,
+          indirect_strict_weak_order<projected<iterator_t<R>, Proj>> Comp = ranges::less>
+   requires indirectly_copyable_storable<iterator_t<R>, range_value_t<R>*>
+   constexpr range_value_t<R>
+     min(R&& r, Comp comp = {}, Proj proj = {});                                    // since C++20
+
+  template<class T, class Proj = identity,
+           indirect_strict_weak_order<projected<const T*, Proj>> Comp = ranges::less>
+    constexpr const T& max(const T& a, const T& b, Comp comp = {}, Proj proj = {}); // since C++20
+
+  template<copyable T, class Proj = identity,
+           indirect_strict_weak_order<projected<const T*, Proj>> Comp = ranges::less>
+    constexpr T max(initializer_list<T> r, Comp comp = {}, Proj proj = {});         // since C++20
+
+  template<input_range R, class Proj = identity,
+           indirect_strict_weak_order<projected<iterator_t<R>, Proj>> Comp = ranges::less>
+    requires indirectly_copyable_storable<iterator_t<R>, range_value_t<R>*>
+    constexpr range_value_t<R>
+      max(R&& r, Comp comp = {}, Proj proj = {});                                   // since C++20
+
+  template<class I, class O>
+    using unary_transform_result = in_out_result<I, O>;                             // since C++20
+
+  template<class I1, class I2, class O>
+    using binary_transform_result = in_in_out_result<I1, I2, O>;                    // since C++20
+
+  template<input_iterator I, sentinel_for<I> S, weakly_incrementable O,
+           copy_constructible F, class Proj = identity>
+    requires indirectly_writable<O, indirect_result_t<F&, projected<I, Proj>>>
+    constexpr ranges::unary_transform_result<I, O>
+      transform(I first1, S last1, O result, F op, Proj proj = {});                 // since C++20
+
+  template<input_range R, weakly_incrementable O, copy_constructible F,
+           class Proj = identity>
+    requires indirectly_writable<O, indirect_result_t<F&, projected<iterator_t<R>, Proj>>>
+    constexpr ranges::unary_transform_result<borrowed_iterator_t<R>, O>
+      transform(R&& r, O result, F op, Proj proj = {});                             // since C++20
+
+  template<input_iterator I1, sentinel_for<I1> S1, input_iterator I2, sentinel_for<I2> S2,
+           weakly_incrementable O, copy_constructible F, class Proj1 = identity,
+           class Proj2 = identity>
+    requires indirectly_writable<O, indirect_result_t<F&, projected<I1, Proj1>,
+                                           projected<I2, Proj2>>>
+    constexpr ranges::binary_transform_result<I1, I2, O>
+      transform(I1 first1, S1 last1, I2 first2, S2 last2, O result,
+                        F binary_op, Proj1 proj1 = {}, Proj2 proj2 = {});           // since C++20
+
+  template<input_range R1, input_range R2, weakly_incrementable O,
+           copy_constructible F, class Proj1 = identity, class Proj2 = identity>
+    requires indirectly_writable<O, indirect_result_t<F&, projected<iterator_t<R1>, Proj1>,
+                                           projected<iterator_t<R2>, Proj2>>>
+    constexpr ranges::binary_transform_result<borrowed_iterator_t<R1>, borrowed_iterator_t<R2>, O>
+      transform(R1&& r1, R2&& r2, O result,
+                        F binary_op, Proj1 proj1 = {}, Proj2 proj2 = {});           // since C++20
+
+  template<input_iterator I, sentinel_for<I> S, class T, class Proj = identity>
+    requires indirect_binary_predicate<ranges::equal_to, projected<I, Proj>, const T*>
+    constexpr iter_difference_t<I>
+      count(I first, S last, const T& value, Proj proj = {});                       // since C++20
+
+  template<input_range R, class T, class Proj = identity>
+    requires indirect_binary_predicate<ranges::equal_to, projected<iterator_t<R>, Proj>, const T*>
+    constexpr range_difference_t<R>
+      count(R&& r, const T& value, Proj proj = {});                                 // since C++20
+
+  template<input_iterator I, sentinel_for<I> S, class Proj = identity,
+           indirect_unary_predicate<projected<I, Proj>> Pred>
+    constexpr iter_difference_t<I>
+      count_if(I first, S last, Pred pred, Proj proj = {});                         // since C++20
+
+  template<input_range R, class Proj = identity,
+           indirect_unary_predicate<projected<iterator_t<R>, Proj>> Pred>
+    constexpr range_difference_t<R>
+      count_if(R&& r, Pred pred, Proj proj = {});                                   // since C++20
+
+  template<class T>
+  using minmax_result = min_max_result<T>;
+
+  template<class T, class Proj = identity,
+           indirect_strict_weak_order<projected<const T*, Proj>> Comp = ranges::less>
+    constexpr ranges::minmax_result<const T&>
+      minmax(const T& a, const T& b, Comp comp = {}, Proj proj = {});                     // since C++20
+
+  template<copyable T, class Proj = identity,
+           indirect_strict_weak_order<projected<const T*, Proj>> Comp = ranges::less>
+    constexpr ranges::minmax_result<T>
+      minmax(initializer_list<T> r, Comp comp = {}, Proj proj = {});                      // since C++20
+
+  template<input_range R, class Proj = identity,
+           indirect_strict_weak_order<projected<iterator_t<R>, Proj>> Comp = ranges::less>
+    requires indirectly_copyable_storable<iterator_t<R>, range_value_t<R>*>
+    constexpr ranges::minmax_result<range_value_t<R>>
+      minmax(R&& r, Comp comp = {}, Proj proj = {});                                      // since C++20
+
+  template<class I>
+  using minmax_element_result = min_max_result<I>;
+
+  template<forward_iterator I, sentinel_for<I> S, class Proj = identity,
+           indirect_strict_weak_order<projected<I, Proj>> Comp = ranges::less>
+    constexpr ranges::minmax_element_result<I>
+      minmax_element(I first, S last, Comp comp = {}, Proj proj = {});                    // since C++20
+
+  template<forward_range R, class Proj = identity,
+           indirect_strict_weak_order<projected<iterator_t<R>, Proj>> Comp = ranges::less>
+    constexpr ranges::minmax_element_result<borrowed_iterator_t<R>>
+      minmax_element(R&& r, Comp comp = {}, Proj proj = {});                              // since C++20
+
+  template<class I, class O>
+    using copy_result = in_out_result<I, O>;                                              // since C++20
+
+  template<class I, class O>
+    using copy_n_result = in_out_result<I, O>;                                            // since C++20
+
+  template<class I, class O>
+    using copy_if_result = in_out_result<I, O>;                                             // since C++20
+
+  template<class I1, class I2>
+    using copy_backward_result = in_out_result<I1, I2>;                                     // since C++20
+
+  template<input_iterator I, sentinel_for<I> S, weakly_incrementable O>
+    requires indirectly_copyable<I, O>
+    constexpr ranges::copy_result<I, O> ranges::copy(I first, S last, O result);            // since C++20
+
+  template<input_range R, weakly_incrementable O>
+    requires indirectly_copyable<iterator_t<R>, O>
+    constexpr ranges::copy_result<borrowed_iterator_t<R>, O> ranges::copy(R&& r, O result); // since C++20
+
+  template<input_iterator I, weakly_incrementable O>
+    requires indirectly_copyable<I, O>
+    constexpr ranges::copy_n_result<I, O>
+      ranges::copy_n(I first, iter_difference_t<I> n, O result);                            // since C++20
+
+  template<input_iterator I, sentinel_for<I> S, weakly_incrementable O, class Proj = identity,
+           indirect_unary_predicate<projected<I, Proj>> Pred>
+    requires indirectly_copyable<I, O>
+    constexpr ranges::copy_if_result<I, O>
+      ranges::copy_if(I first, S last, O result, Pred pred, Proj proj = {});                // since C++20
+
+  template<input_range R, weakly_incrementable O, class Proj = identity,
+           indirect_unary_predicate<projected<iterator_t<R>, Proj>> Pred>
+    requires indirectly_copyable<iterator_t<R>, O>
+    constexpr ranges::copy_if_result<borrowed_iterator_t<R>, O>
+      ranges::copy_if(R&& r, O result, Pred pred, Proj proj = {});                          // since C++20
+
+  template<bidirectional_iterator I1, sentinel_for<I1> S1, bidirectional_iterator I2>
+    requires indirectly_copyable<I1, I2>
+    constexpr ranges::copy_backward_result<I1, I2>
+      ranges::copy_backward(I1 first, S1 last, I2 result);                                  // since C++20
+
+  template<bidirectional_range R, bidirectional_iterator I>
+    requires indirectly_copyable<iterator_t<R>, I>
+    constexpr ranges::copy_backward_result<borrowed_iterator_t<R>, I>
+      ranges::copy_backward(R&& r, I result);                                               // since C++20
+
+  template<class I, class F>
+    using for_each_result = in_fun_result<I, F>;                                            // since C++20
+
+  template<input_iterator I, sentinel_for<I> S, class Proj = identity,
+           indirectly_unary_invocable<projected<I, Proj>> Fun>
+    constexpr ranges::for_each_result<I, Fun>
+      ranges::for_each(I first, S last, Fun f, Proj proj = {});                             // since C++20
+
+  template<input_range R, class Proj = identity,
+           indirectly_unary_invocable<projected<iterator_t<R>, Proj>> Fun>
+    constexpr ranges::for_each_result<borrowed_iterator_t<R>, Fun>
+      ranges::for_each(R&& r, Fun f, Proj proj = {});                                       // since C++20
+
+  template<input_iterator I, class Proj = identity,
+           indirectly_unary_invocable<projected<I, Proj>> Fun>
+    constexpr ranges::for_each_n_result<I, Fun>
+      ranges::for_each_n(I first, iter_difference_t<I> n, Fun f, Proj proj = {});           // since C++20
+
+  template<input_iterator I, sentinel_for<I> S, class Proj = identity,
+           indirect_unary_predicate<projected<I, Proj>> Pred>
+    constexpr bool ranges::is_partitioned(I first, S last, Pred pred, Proj proj = {});      // since C++20
+
+  template<input_range R, class Proj = identity,
+           indirect_unary_predicate<projected<iterator_t<R>, Proj>> Pred>
+    constexpr bool ranges::is_partitioned(R&& r, Pred pred, Proj proj = {});                // since C++20
+
+  template<random_access_iterator I, sentinel_for<I> S, class Comp = ranges::less,
+          class Proj = identity>
+    requires sortable<I, Comp, Proj>
+    constexpr I
+      ranges::push_heap(I first, S last, Comp comp = {}, Proj proj = {});                   // since C++20
+
+  template<random_access_range R, class Comp = ranges::less, class Proj = identity>
+    requires sortable<iterator_t<R>, Comp, Proj>
+    constexpr borrowed_iterator_t<R>
+      ranges::push_heap(R&& r, Comp comp = {}, Proj proj = {});                             // since C++20
+
+  template<random_access_iterator I, sentinel_for<I> S, class Comp = ranges::less,
+          class Proj = identity>
+    requires sortable<I, Comp, Proj>
+    constexpr I
+      ranges::pop_heap(I first, S last, Comp comp = {}, Proj proj = {});                    // since C++20
+
+  template<random_access_range R, class Comp = ranges::less, class Proj = identity>
+    requires sortable<iterator_t<R>, Comp, Proj>
+    constexpr borrowed_iterator_t<R>
+      ranges::pop_heap(R&& r, Comp comp = {}, Proj proj = {});                              // since C++20
+
+  template<random_access_iterator I, sentinel_for<I> S, class Comp = ranges::less,
+          class Proj = identity>
+    requires sortable<I, Comp, Proj>
+    constexpr I
+      ranges::make_heap(I first, S last, Comp comp = {}, Proj proj = {});                   // since C++20
+
+  template<random_access_range R, class Comp = ranges::less, class Proj = identity>
+    requires sortable<iterator_t<R>, Comp, Proj>
+    constexpr borrowed_iterator_t<R>
+      ranges::make_heap(R&& r, Comp comp = {}, Proj proj = {});                             // since C++20
+
+  template<random_access_iterator I, sentinel_for<I> S, class Comp = ranges::less,
+          class Proj = identity>
+    requires sortable<I, Comp, Proj>
+    constexpr I
+      ranges::sort_heap(I first, S last, Comp comp = {}, Proj proj = {});                   // since C++20
+
+  template<random_access_range R, class Comp = ranges::less, class Proj = identity>
+    requires sortable<iterator_t<R>, Comp, Proj>
+    constexpr borrowed_iterator_t<R>
+      ranges::sort_heap(R&& r, Comp comp = {}, Proj proj = {});                             // since C++20
+
+  template<random_access_iterator I, sentinel_for<I> S, class Proj = identity,
+            indirect_strict_weak_order<projected<I, Proj>> Comp = ranges::less>
+    constexpr bool is_heap(I first, S last, Comp comp = {}, Proj proj = {});                // Since C++20
+
+  template<random_access_range R, class Proj = identity,
+            indirect_strict_weak_order<projected<iterator_t<R>, Proj>> Comp = ranges::less>
+    constexpr bool is_heap(R&& r, Comp comp = {}, Proj proj = {});                          // Since C++20
+
+  template<random_access_iterator I, sentinel_for<I> S, class Proj = identity,
+           indirect_strict_weak_order<projected<I, Proj>> Comp = ranges::less>
+    constexpr I is_heap_until(I first, S last, Comp comp = {}, Proj proj = {});             // Since C++20
+
+  template<random_access_range R, class Proj = identity,
+           indirect_strict_weak_order<projected<iterator_t<R>, Proj>> Comp = ranges::less>
+    constexpr borrowed_iterator_t<R>
+      is_heap_until(R&& r, Comp comp = {}, Proj proj = {});                                 // Since C++20
+
+  template<bidirectional_iterator I, sentinel_for<I> S>
+    requires permutable<I>
+    constexpr I ranges::reverse(I first, S last);                                           // since C++20
+
+  template<bidirectional_range R>
+    requires permutable<iterator_t<R>>
+    constexpr borrowed_iterator_t<R> ranges::reverse(R&& r);                                // since C++20
+
+  template<random_access_iterator I, sentinel_for<I> S, class Comp = ranges::less,
+            class Proj = identity>
+    requires sortable<I, Comp, Proj>
+    constexpr I
+      ranges::sort(I first, S last, Comp comp = {}, Proj proj = {});                        // since C++20
+
+  template<random_access_range R, class Comp = ranges::less, class Proj = identity>
+    requires sortable<iterator_t<R>, Comp, Proj>
+    constexpr borrowed_iterator_t<R>
+      ranges::sort(R&& r, Comp comp = {}, Proj proj = {});                                  // since C++20
+
+  template<random_access_iterator I, sentinel_for<I> S, class Comp = ranges::less,
+          class Proj = identity>
+    requires sortable<I, Comp, Proj>
+    I ranges::stable_sort(I first, S last, Comp comp = {}, Proj proj = {});                 // since C++20
+
+  template<random_access_range R, class Comp = ranges::less, class Proj = identity>
+    requires sortable<iterator_t<R>, Comp, Proj>
+    borrowed_iterator_t<R>
+      ranges::stable_sort(R&& r, Comp comp = {}, Proj proj = {});                           // since C++20
+
+  template<random_access_iterator I, sentinel_for<I> S, class Comp = ranges::less,
+           class Proj = identity>
+    requires sortable<I, Comp, Proj>
+    constexpr I
+      ranges::partial_sort(I first, I middle, S last, Comp comp = {}, Proj proj = {});      // since C++20
+
+  template<random_access_range R, class Comp = ranges::less, class Proj = identity>
+    requires sortable<iterator_t<R>, Comp, Proj>
+    constexpr borrowed_iterator_t<R>
+      ranges::partial_sort(R&& r, iterator_t<R> middle, Comp comp = {}, Proj proj = {});    // since C++20
+
+  template<class T, output_iterator<const T&> O, sentinel_for<O> S>
+    constexpr O ranges::fill(O first, S last, const T& value);                              // since C++20
+
+  template<class T, output_range<const T&> R>
+    constexpr borrowed_iterator_t<R> ranges::fill(R&& r, const T& value);                   // since C++20
+
+  template<class T, output_iterator<const T&> O>
+    constexpr O ranges::fill_n(O first, iter_difference_t<O> n, const T& value);            // since C++20
+
+  template<input_or_output_iterator O, sentinel_for<O> S, copy_constructible F>
+    requires invocable<F&> && indirectly_writable<O, invoke_result_t<F&>>
+    constexpr O generate(O first, S last, F gen);                                           // Since C++20
+
+  template<class R, copy_constructible F>
+    requires invocable<F&> && output_range<R, invoke_result_t<F&>>
+    constexpr borrowed_iterator_t<R> generate(R&& r, F gen);                                // Since C++20
+
+  template<input_or_output_iterator O, copy_constructible F>
+    requires invocable<F&> && indirectly_writable<O, invoke_result_t<F&>>
+    constexpr O generate_n(O first, iter_difference_t<O> n, F gen);                         // Since C++20
+
+ template<input_iterator I1, sentinel_for<I1> S1, input_iterator I2, sentinel_for<I2> S2,
+          class Pred = ranges::equal_to, class Proj1 = identity, class Proj2 = identity>
+   requires indirectly_comparable<I1, I2, Pred, Proj1, Proj2>
+   constexpr bool ranges::equal(I1 first1, S1 last1, I2 first2, S2 last2,
+                                Pred pred = {},
+                                Proj1 proj1 = {}, Proj2 proj2 = {});                        // since C++20
+
+ template<input_range R1, input_range R2, class Pred = ranges::equal_to,
+          class Proj1 = identity, class Proj2 = identity>
+   requires indirectly_comparable<iterator_t<R1>, iterator_t<R2>, Pred, Proj1, Proj2>
+   constexpr bool ranges::equal(R1&& r1, R2&& r2, Pred pred = {},
+                                Proj1 proj1 = {}, Proj2 proj2 = {});                        // since C++20
+
+  template<input_iterator I, sentinel_for<I> S, class Proj = identity,
+           indirect_unary_predicate<projected<I, Proj>> Pred>
+    constexpr bool ranges::all_of(I first, S last, Pred pred, Proj proj = {});      // since C++20
+
+  template<input_range R, class Proj = identity,
+           indirect_unary_predicate<projected<iterator_t<R>, Proj>> Pred>
+    constexpr bool ranges::all_of(R&& r, Pred pred, Proj proj = {});                // since C++20
+
+  template<input_iterator I, sentinel_for<I> S, class Proj = identity,
+           indirect_unary_predicate<projected<I, Proj>> Pred>
+    constexpr bool ranges::any_of(I first, S last, Pred pred, Proj proj = {});      // since C++20
+
+  template<input_range R, class Proj = identity,
+           indirect_unary_predicate<projected<iterator_t<R>, Proj>> Pred>
+    constexpr bool ranges::any_of(R&& r, Pred pred, Proj proj = {});                // since C++20
+
+  template<input_iterator I, sentinel_for<I> S, class Proj = identity,
+           indirect_unary_predicate<projected<I, Proj>> Pred>
+    constexpr bool ranges::none_of(I first, S last, Pred pred, Proj proj = {});     // since C++20
+
+  template<input_range R, class Proj = identity,
+           indirect_unary_predicate<projected<iterator_t<R>, Proj>> Pred>
+    constexpr bool ranges::none_of(R&& r, Pred pred, Proj proj = {});               // since C++20
+
+  template<input_iterator I1, sentinel_for<I1> S1,
+          random_access_iterator I2, sentinel_for<I2> S2,
+          class Comp = ranges::less, class Proj1 = identity, class Proj2 = identity>
+    requires indirectly_copyable<I1, I2> && sortable<I2, Comp, Proj2> &&
+            indirect_strict_weak_order<Comp, projected<I1, Proj1>, projected<I2, Proj2>>
+    constexpr partial_sort_copy_result<I1, I2>
+      partial_sort_copy(I1 first, S1 last, I2 result_first, S2 result_last,
+                        Comp comp = {}, Proj1 proj1 = {}, Proj2 proj2 = {});        // Since C++20
+
+  template<input_range R1, random_access_range R2, class Comp = ranges::less,
+          class Proj1 = identity, class Proj2 = identity>
+    requires indirectly_copyable<iterator_t<R1>, iterator_t<R2>> &&
+            sortable<iterator_t<R2>, Comp, Proj2> &&
+            indirect_strict_weak_order<Comp, projected<iterator_t<R1>, Proj1>,
+                                        projected<iterator_t<R2>, Proj2>>
+    constexpr partial_sort_copy_result<borrowed_iterator_t<R1>, borrowed_iterator_t<R2>>
+      partial_sort_copy(R1&& r, R2&& result_r, Comp comp = {},
+                        Proj1 proj1 = {}, Proj2 proj2 = {});                        // Since C++20
+
+  template<forward_iterator I, sentinel_for<I> S, class Proj = identity,
+           indirect_strict_weak_order<projected<I, Proj>> Comp = ranges::less>
+    constexpr bool ranges::is_sorted(I first, S last, Comp comp = {}, Proj proj = {});      // since C++20
+
+  template<forward_range R, class Proj = identity,
+           indirect_strict_weak_order<projected<iterator_t<R>, Proj>> Comp = ranges::less>
+    constexpr bool ranges::is_sorted(R&& r, Comp comp = {}, Proj proj = {});                // since C++20
+
+  template<forward_iterator I, sentinel_for<I> S, class Proj = identity,
+           indirect_strict_weak_order<projected<I, Proj>> Comp = ranges::less>
+    constexpr I ranges::is_sorted_until(I first, S last, Comp comp = {}, Proj proj = {});   // since C++20
+
+  template<forward_range R, class Proj = identity,
+           indirect_strict_weak_order<projected<iterator_t<R>, Proj>> Comp = ranges::less>
+    constexpr borrowed_iterator_t<R>
+      ranges::is_sorted_until(R&& r, Comp comp = {}, Proj proj = {});                       // since C++20
+
+  template<random_access_iterator I, sentinel_for<I> S, class Comp = ranges::less,
+          class Proj = identity>
+    requires sortable<I, Comp, Proj>
+    constexpr I
+      ranges::nth_element(I first, I nth, S last, Comp comp = {}, Proj proj = {});            // since C++20
+
+  template<random_access_range R, class Comp = ranges::less, class Proj = identity>
+    requires sortable<iterator_t<R>, Comp, Proj>
+    constexpr borrowed_iterator_t<R>
+      ranges::nth_element(R&& r, iterator_t<R> nth, Comp comp = {}, Proj proj = {});          // since C++20
+
+  template<forward_iterator I, sentinel_for<I> S, class T, class Proj = identity,
+           indirect_strict_weak_order<const T*, projected<I, Proj>> Comp = ranges::less>
+    constexpr I upper_bound(I first, S last, const T& value, Comp comp = {}, Proj proj = {}); // since C++20
+
+  template<forward_range R, class T, class Proj = identity,
+           indirect_strict_weak_order<const T*, projected<iterator_t<R>, Proj>> Comp =
+             ranges::less>
+    constexpr borrowed_iterator_t<R>
+      upper_bound(R&& r, const T& value, Comp comp = {}, Proj proj = {});                     // since C++20
+
+  template<forward_iterator I, sentinel_for<I> S, class T, class Proj = identity,
+           indirect_strict_weak_order<const T*, projected<I, Proj>> Comp = ranges::less>
+    constexpr I lower_bound(I first, S last, const T& value, Comp comp = {},
+                                    Proj proj = {});                                          // since C++20
+  template<forward_range R, class T, class Proj = identity,
+           indirect_strict_weak_order<const T*, projected<iterator_t<R>, Proj>> Comp =
+             ranges::less>
+    constexpr borrowed_iterator_t<R>
+      lower_bound(R&& r, const T& value, Comp comp = {}, Proj proj = {});                     // since C++20
+
+  template<forward_iterator I, sentinel_for<I> S, class T, class Proj = identity,
+           indirect_strict_weak_order<const T*, projected<I, Proj>> Comp = ranges::less>
+    constexpr bool binary_search(I first, S last, const T& value, Comp comp = {},
+                                         Proj proj = {});                                     // since C++20
+
+  template<forward_range R, class T, class Proj = identity,
+           indirect_strict_weak_order<const T*, projected<iterator_t<R>, Proj>> Comp =
+             ranges::less>
+    constexpr bool binary_search(R&& r, const T& value, Comp comp = {},
+                                         Proj proj = {});                                     // since C++20
+
+  template<permutable I, sentinel_for<I> S, class Proj = identity,
+           indirect_unary_predicate<projected<I, Proj>> Pred>
+    constexpr subrange<I>
+      partition(I first, S last, Pred pred, Proj proj = {});                                  // Since C++20
+
+  template<forward_range R, class Proj = identity,
+           indirect_unary_predicate<projected<iterator_t<R>, Proj>> Pred>
+    requires permutable<iterator_t<R>>
+    constexpr borrowed_subrange_t<R>
+      partition(R&& r, Pred pred, Proj proj = {});                                            // Since C++20
+
+  template<bidirectional_iterator I, sentinel_for<I> S, class Proj = identity,
+           indirect_unary_predicate<projected<I, Proj>> Pred>
+    requires permutable<I>
+    subrange<I> stable_partition(I first, S last, Pred pred, Proj proj = {});                 // Since C++20
+
+  template<bidirectional_range R, class Proj = identity,
+           indirect_unary_predicate<projected<iterator_t<R>, Proj>> Pred>
+    requires permutable<iterator_t<R>>
+    borrowed_subrange_t<R> stable_partition(R&& r, Pred pred, Proj proj = {});                // Since C++20
+
+  template<input_iterator I1, sentinel_for<I1> S1, forward_iterator I2, sentinel_for<I2> S2,
+           class Pred = ranges::equal_to, class Proj1 = identity, class Proj2 = identity>
+    requires indirectly_comparable<I1, I2, Pred, Proj1, Proj2>
+    constexpr I1 ranges::find_first_of(I1 first1, S1 last1, I2 first2, S2 last2,
+                                       Pred pred = {},
+                                       Proj1 proj1 = {}, Proj2 proj2 = {});                 // since C++20
+
+  template<input_range R1, forward_range R2,
+           class Pred = ranges::equal_to, class Proj1 = identity, class Proj2 = identity>
+    requires indirectly_comparable<iterator_t<R1>, iterator_t<R2>, Pred, Proj1, Proj2>
+    constexpr borrowed_iterator_t<R1>
+      ranges::find_first_of(R1&& r1, R2&& r2,
+                            Pred pred = {},
+                            Proj1 proj1 = {}, Proj2 proj2 = {});                            // since C++20
+
+  template<forward_iterator I, sentinel_for<I> S, class Proj = identity,
+           indirect_binary_predicate<projected<I, Proj>,
+                                     projected<I, Proj>> Pred = ranges::equal_to>
+    constexpr I ranges::adjacent_find(I first, S last, Pred pred = {}, Proj proj = {});     // since C+20
+
+  template<forward_range R, class Proj = identity,
+           indirect_binary_predicate<projected<iterator_t<R>, Proj>,
+                                     projected<iterator_t<R>, Proj>> Pred = ranges::equal_to>
+    constexpr borrowed_iterator_t<R> ranges::adjacent_find(R&& r, Pred pred = {}, Proj proj = {});  // since C++20
+
+  template<input_iterator I, sentinel_for<I> S, class T1, class T2, class Proj = identity>
+    requires indirectly_writable<I, const T2&> &&
+             indirect_binary_predicate<ranges::equal_to, projected<I, Proj>, const T1*>
+    constexpr I
+      ranges::replace(I first, S last, const T1& old_value, const T2& new_value, Proj proj = {});   // since C++20
+
+  template<input_range R, class T1, class T2, class Proj = identity>
+    requires indirectly_writable<iterator_t<R>, const T2&> &&
+             indirect_binary_predicate<ranges::equal_to, projected<iterator_t<R>, Proj>, const T1*>
+    constexpr borrowed_iterator_t<R>
+      ranges::replace(R&& r, const T1& old_value, const T2& new_value, Proj proj = {});             // since C++20
+
+  template<input_iterator I, sentinel_for<I> S, class T, class Proj = identity,
+           indirect_unary_predicate<projected<I, Proj>> Pred>
+    requires indirectly_writable<I, const T&>
+    constexpr I ranges::replace_if(I first, S last, Pred pred, const T& new_value, Proj proj = {}); // since C++20
+
+  template<input_range R, class T, class Proj = identity,
+           indirect_unary_predicate<projected<iterator_t<R>, Proj>> Pred>
+    requires indirectly_writable<iterator_t<R>, const T&>
+    constexpr borrowed_iterator_t<R>
+      ranges::replace_if(R&& r, Pred pred, const T& new_value, Proj proj = {});                     // since C++20
+
+  template<class T, class Proj = identity,
+           indirect_strict_weak_order<projected<const T*, Proj>> Comp = ranges::less>
+    constexpr const T&
+      ranges::clamp(const T& v, const T& lo, const T& hi, Comp comp = {}, Proj proj = {});          // since C++20
+
+  template<input_iterator I1, sentinel_for<I1> S1, input_iterator I2, sentinel_for<I2> S2,
+           class Proj1 = identity, class Proj2 = identity,
+           indirect_strict_weak_order<projected<I1, Proj1>,
+                                      projected<I2, Proj2>> Comp = ranges::less>
+    constexpr bool
+      ranges::lexicographical_compare(I1 first1, S1 last1, I2 first2, S2 last2,
+                                      Comp comp = {}, Proj1 proj1 = {}, Proj2 proj2 = {});    // since C++20
+
+  template<input_range R1, input_range R2, class Proj1 = identity,
+           class Proj2 = identity,
+           indirect_strict_weak_order<projected<iterator_t<R1>, Proj1>,
+                                      projected<iterator_t<R2>, Proj2>> Comp = ranges::less>
+    constexpr bool
+      ranges::lexicographical_compare(R1&& r1, R2&& r2, Comp comp = {},
+                                      Proj1 proj1 = {}, Proj2 proj2 = {});                    // since C++20
+
+  template<bidirectional_iterator I1, sentinel_for<I1> S1, bidirectional_iterator I2>
+    requires indirectly_movable<I1, I2>
+    constexpr ranges::move_backward_result<I1, I2>
+      ranges::move_backward(I1 first, S1 last, I2 result);                                          // since C++20
+
+  template<bidirectional_range R, bidirectional_iterator I>
+    requires indirectly_movable<iterator_t<R>, I>
+    constexpr ranges::move_backward_result<borrowed_iterator_t<R>, I>
+      ranges::move_backward(R&& r, I result);                                                       // since C++20
+
+  template<input_iterator I, sentinel_for<I> S, weakly_incrementable O>
+    requires indirectly_movable<I, O>
+    constexpr ranges::move_result<I, O>
+      ranges::move(I first, S last, O result);                                                      // since C++20
+
+  template<input_range R, weakly_incrementable O>
+    requires indirectly_movable<iterator_t<R>, O>
+    constexpr ranges::move_result<borrowed_iterator_t<R>, O>
+      ranges::move(R&& r, O result);                                                                // since C++20
+
+  template<class I, class O1, class O2>
+      using partition_copy_result = in_out_out_result<I, O1, O2>;                                   // since C++20
+
+  template<input_iterator I, sentinel_for<I> S,
+          weakly_incrementable O1, weakly_incrementable O2,
+          class Proj = identity, indirect_unary_predicate<projected<I, Proj>> Pred>
+    requires indirectly_copyable<I, O1> && indirectly_copyable<I, O2>
+    constexpr partition_copy_result<I, O1, O2>
+      partition_copy(I first, S last, O1 out_true, O2 out_false, Pred pred,
+                    Proj proj = {});                                                                // Since C++20
+
+  template<input_range R, weakly_incrementable O1, weakly_incrementable O2,
+          class Proj = identity,
+          indirect_unary_predicate<projected<iterator_t<R>, Proj>> Pred>
+    requires indirectly_copyable<iterator_t<R>, O1> &&
+            indirectly_copyable<iterator_t<R>, O2>
+    constexpr partition_copy_result<borrowed_iterator_t<R>, O1, O2>
+      partition_copy(R&& r, O1 out_true, O2 out_false, Pred pred, Proj proj = {});                  // Since C++20
+
+  template<forward_iterator I, sentinel_for<I> S, class Proj = identity,
+           indirect_unary_predicate<projected<I, Proj>> Pred>
+    constexpr I partition_point(I first, S last, Pred pred, Proj proj = {});                        // Since C++20
+
+  template<forward_range R, class Proj = identity,
+           indirect_unary_predicate<projected<iterator_t<R>, Proj>> Pred>
+    constexpr borrowed_iterator_t<R>
+      partition_point(R&& r, Pred pred, Proj proj = {});                                            // Since C++20
+
+  template<class I1, class I2, class O>
+    using merge_result = in_in_out_result<I1, I2, O>;                                               // since C++20
+
+  template<input_iterator I1, sentinel_for<I1> S1, input_iterator I2, sentinel_for<I2> S2,
+           weakly_incrementable O, class Comp = ranges::less, class Proj1 = identity,
+           class Proj2 = identity>
+    requires mergeable<I1, I2, O, Comp, Proj1, Proj2>
+    constexpr merge_result<I1, I2, O>
+      merge(I1 first1, S1 last1, I2 first2, S2 last2, O result,
+            Comp comp = {}, Proj1 proj1 = {}, Proj2 proj2 = {});                                    // since C++20
+
+  template<input_range R1, input_range R2, weakly_incrementable O, class Comp = ranges::less,
+           class Proj1 = identity, class Proj2 = identity>
+    requires mergeable<iterator_t<R1>, iterator_t<R2>, O, Comp, Proj1, Proj2>
+    constexpr merge_result<borrowed_iterator_t<R1>, borrowed_iterator_t<R2>, O>
+      merge(R1&& r1, R2&& r2, O result,
+            Comp comp = {}, Proj1 proj1 = {}, Proj2 proj2 = {});                                    // since C++20
+
+  template<permutable I, sentinel_for<I> S, class T, class Proj = identity>
+    requires indirect_binary_predicate<ranges::equal_to, projected<I, Proj>, const T*>
+    constexpr subrange<I> ranges::remove(I first, S last, const T& value, Proj proj = {});          // since C++20
+
+  template<forward_range R, class T, class Proj = identity>
+    requires permutable<iterator_t<R>> &&
+             indirect_binary_predicate<ranges::equal_to, projected<iterator_t<R>, Proj>, const T*>
+    constexpr borrowed_subrange_t<R>
+      ranges::remove(R&& r, const T& value, Proj proj = {});                                        // since C++20
+
+  template<permutable I, sentinel_for<I> S, class Proj = identity,
+           indirect_unary_predicate<projected<I, Proj>> Pred>
+    constexpr subrange<I> ranges::remove_if(I first, S last, Pred pred, Proj proj = {});            // since C++20
+
+  template<forward_range R, class Proj = identity,
+           indirect_unary_predicate<projected<iterator_t<R>, Proj>> Pred>
+    requires permutable<iterator_t<R>>
+    constexpr borrowed_subrange_t<R>
+      ranges::remove_if(R&& r, Pred pred, Proj proj = {});                                          // since C++20
+
+  template<class I, class O>
+    using set_difference_result = in_out_result<I, O>;                                              // since C++20
+
+  template<input_iterator I1, sentinel_for<I1> S1, input_iterator I2, sentinel_for<I2> S2,
+           weakly_incrementable O, class Comp = ranges::less,
+           class Proj1 = identity, class Proj2 = identity>
+    requires mergeable<I1, I2, O, Comp, Proj1, Proj2>
+    constexpr set_difference_result<I1, O>
+      set_difference(I1 first1, S1 last1, I2 first2, S2 last2, O result,
+                     Comp comp = {}, Proj1 proj1 = {}, Proj2 proj2 = {});                           // since C++20
+
+  template<input_range R1, input_range R2, weakly_incrementable O,
+           class Comp = ranges::less, class Proj1 = identity, class Proj2 = identity>
+    requires mergeable<iterator_t<R1>, iterator_t<R2>, O, Comp, Proj1, Proj2>
+    constexpr set_difference_result<borrowed_iterator_t<R1>, O>
+      set_difference(R1&& r1, R2&& r2, O result,
+                     Comp comp = {}, Proj1 proj1 = {}, Proj2 proj2 = {});                           // since C++20
+
+  template<class I1, class I2, class O>
+    using set_intersection_result = in_in_out_result<I1, I2, O>;                                    // since C++20
+
+  template<input_iterator I1, sentinel_for<I1> S1, input_iterator I2, sentinel_for<I2> S2,
+           weakly_incrementable O, class Comp = ranges::less,
+           class Proj1 = identity, class Proj2 = identity>
+    requires mergeable<I1, I2, O, Comp, Proj1, Proj2>
+    constexpr set_intersection_result<I1, I2, O>
+      set_intersection(I1 first1, S1 last1, I2 first2, S2 last2, O result,
+                       Comp comp = {}, Proj1 proj1 = {}, Proj2 proj2 = {});                         // since C++20
+
+  template<input_iterator I1, sentinel_for<I1> S1, input_iterator I2, sentinel_for<I2> S2,
+           weakly_incrementable O, class Comp = ranges::less,
+           class Proj1 = identity, class Proj2 = identity>
+    requires mergeable<I1, I2, O, Comp, Proj1, Proj2>
+    constexpr set_intersection_result<borrowed_iterator_t<R1>, borrowed_iterator_t<R2>, O>
+      set_intersection(R1&& r1, R2&& r2, O result,
+                       Comp comp = {}, Proj1 proj1 = {}, Proj2 proj2 = {});                         // since C++20
+
+  template <class _InIter, class _OutIter>
+  using reverse_copy_result = in_out_result<_InIter, _OutIter>;                                     // since C++20
+
+  template<bidirectional_iterator I, sentinel_for<I> S, weakly_incrementable O>
+    requires indirectly_copyable<I, O>
+    constexpr ranges::reverse_copy_result<I, O>
+      ranges::reverse_copy(I first, S last, O result);                                              // since C++20
+
+  template<bidirectional_range R, weakly_incrementable O>
+    requires indirectly_copyable<iterator_t<R>, O>
+    constexpr ranges::reverse_copy_result<borrowed_iterator_t<R>, O>
+      ranges::reverse_copy(R&& r, O result);                                                        // since C++20
+
+  template<permutable I, sentinel_for<I> S>
+    constexpr subrange<I> rotate(I first, I middle, S last);                                        // since C++20
+
+  template<forward_range R>
+    requires permutable<iterator_t<R>>
+    constexpr borrowed_subrange_t<R> rotate(R&& r, iterator_t<R> middle);                           // Since C++20
+
+  template <class _InIter, class _OutIter>
+  using rotate_copy_result = in_out_result<_InIter, _OutIter>;                                      // since C++20
+
+  template<forward_iterator I, sentinel_for<I> S, weakly_incrementable O>
+    requires indirectly_copyable<I, O>
+    constexpr ranges::rotate_copy_result<I, O>
+      ranges::rotate_copy(I first, I middle, S last, O result);                                     // since C++20
+
+  template<forward_range R, weakly_incrementable O>
+    requires indirectly_copyable<iterator_t<R>, O>
+    constexpr ranges::rotate_copy_result<borrowed_iterator_t<R>, O>
+      ranges::rotate_copy(R&& r, iterator_t<R> middle, O result);                                   // since C++20
+
+  template<input_iterator I, sentinel_for<I> S, weakly_incrementable O, class Gen>
+    requires (forward_iterator<I> || random_access_iterator<O>) &&
+            indirectly_copyable<I, O> &&
+            uniform_random_bit_generator<remove_reference_t<Gen>>
+    O sample(I first, S last, O out, iter_difference_t<I> n, Gen&& g);                              // Since C++20
+
+  template<input_range R, weakly_incrementable O, class Gen>
+    requires (forward_range<R> || random_access_iterator<O>) &&
+            indirectly_copyable<iterator_t<R>, O> &&
+            uniform_random_bit_generator<remove_reference_t<Gen>>
+    O sample(R&& r, O out, range_difference_t<R> n, Gen&& g);                                       // Since C++20
+
+  template<random_access_iterator I, sentinel_for<I> S, class Gen>
+    requires permutable<I> &&
+            uniform_random_bit_generator<remove_reference_t<Gen>>
+    I shuffle(I first, S last, Gen&& g);                                                           // Since C++20
+
+  template<random_access_range R, class Gen>
+    requires permutable<iterator_t<R>> &&
+            uniform_random_bit_generator<remove_reference_t<Gen>>
+    borrowed_iterator_t<R> shuffle(R&& r, Gen&& g);                                                // Since C++20
+
+  template<forward_iterator I1, sentinel_for<I1> S1, forward_iterator I2,
+         sentinel_for<I2> S2, class Proj1 = identity, class Proj2 = identity,
+         indirect_equivalence_relation<projected<I1, Proj1>,
+                                       projected<I2, Proj2>> Pred = ranges::equal_to>
+  constexpr bool ranges::is_permutation(I1 first1, S1 last1, I2 first2, S2 last2,
+                                        Pred pred = {},
+                                        Proj1 proj1 = {}, Proj2 proj2 = {});                       // Since C++20
+
+  template<forward_range R1, forward_range R2,
+         class Proj1 = identity, class Proj2 = identity,
+         indirect_equivalence_relation<projected<iterator_t<R1>, Proj1>,
+                                       projected<iterator_t<R2>, Proj2>> Pred = ranges::equal_to>
+  constexpr bool ranges::is_permutation(R1&& r1, R2&& r2, Pred pred = {},
+                                        Proj1 proj1 = {}, Proj2 proj2 = {});                       // Since C++20
+
+  template<forward_iterator I1, sentinel_for<I1> S1, forward_iterator I2,
+           sentinel_for<I2> S2, class Pred = ranges::equal_to,
+           class Proj1 = identity, class Proj2 = identity>
+    requires indirectly_comparable<I1, I2, Pred, Proj1, Proj2>
+    constexpr subrange<I1>
+      ranges::search(I1 first1, S1 last1, I2 first2, S2 last2, Pred pred = {},
+                     Proj1 proj1 = {}, Proj2 proj2 = {});                                           // since C++20
+
+  template<forward_range R1, forward_range R2, class Pred = ranges::equal_to,
+           class Proj1 = identity, class Proj2 = identity>
+    requires indirectly_comparable<iterator_t<R1>, iterator_t<R2>, Pred, Proj1, Proj2>
+    constexpr borrowed_subrange_t<R1>
+      ranges::search(R1&& r1, R2&& r2, Pred pred = {},
+                     Proj1 proj1 = {}, Proj2 proj2 = {});                                           // since C++20
+
+  template<forward_iterator I, sentinel_for<I> S, class T,
+           class Pred = ranges::equal_to, class Proj = identity>
+    requires indirectly_comparable<I, const T*, Pred, Proj>
+    constexpr subrange<I>
+      ranges::search_n(I first, S last, iter_difference_t<I> count,
+                       const T& value, Pred pred = {}, Proj proj = {});                             // since C++20
+
+  template<forward_range R, class T, class Pred = ranges::equal_to,
+           class Proj = identity>
+    requires indirectly_comparable<iterator_t<R>, const T*, Pred, Proj>
+    constexpr borrowed_subrange_t<R>
+      ranges::search_n(R&& r, range_difference_t<R> count,
+                       const T& value, Pred pred = {}, Proj proj = {});                             // since C++20
+
+  template<forward_iterator I1, sentinel_for<I1> S1, forward_iterator I2, sentinel_for<I2> S2,
+           class Pred = ranges::equal_to, class Proj1 = identity, class Proj2 = identity>
+    requires indirectly_comparable<I1, I2, Pred, Proj1, Proj2>
+    constexpr subrange<I1>
+      ranges::find_end(I1 first1, S1 last1, I2 first2, S2 last2, Pred pred = {},
+                       Proj1 proj1 = {}, Proj2 proj2 = {});                                         // since C++20
+
+  template<forward_range R1, forward_range R2,
+           class Pred = ranges::equal_to, class Proj1 = identity, class Proj2 = identity>
+    requires indirectly_comparable<iterator_t<R1>, iterator_t<R2>, Pred, Proj1, Proj2>
+    constexpr borrowed_subrange_t<R1>
+      ranges::find_end(R1&& r1, R2&& r2, Pred pred = {},
+                       Proj1 proj1 = {}, Proj2 proj2 = {});                                         // since C++20
+
+  template<class I1, class I2, class O>
+    using set_symmetric_difference_result = in_in_out_result<I1, I2, O>;                            // since C++20
+
+  template<input_iterator I1, sentinel_for<I1> S1, input_iterator I2, sentinel_for<I2> S2,
+           weakly_incrementable O, class Comp = ranges::less,
+           class Proj1 = identity, class Proj2 = identity>
+    requires mergeable<I1, I2, O, Comp, Proj1, Proj2>
+    constexpr set_symmetric_difference_result<I1, I2, O>
+      set_symmetric_difference(I1 first1, S1 last1, I2 first2, S2 last2, O result,
+                               Comp comp = {}, Proj1 proj1 = {},
+                               Proj2 proj2 = {});                                                   // since C++20
+
+  template<input_range R1, input_range R2, weakly_incrementable O,
+           class Comp = ranges::less, class Proj1 = identity, class Proj2 = identity>
+    requires mergeable<iterator_t<R1>, iterator_t<R2>, O, Comp, Proj1, Proj2>
+    constexpr set_symmetric_difference_result<borrowed_iterator_t<R1>,
+                                                      borrowed_iterator_t<R2>, O>
+      set_symmetric_difference(R1&& r1, R2&& r2, O result, Comp comp = {},
+                               Proj1 proj1 = {}, Proj2 proj2 = {});                                 // since C++20
+
+  template<forward_iterator I, sentinel_for<I> S, class T, class Proj = identity,
+           indirect_strict_weak_order<const T*, projected<I, Proj>> Comp = ranges::less>
+    constexpr subrange<I>
+      equal_range(I first, S last, const T& value, Comp comp = {}, Proj proj = {});                 // since C++20
+
+  template<forward_range R, class T, class Proj = identity,
+           indirect_strict_weak_order<const T*, projected<iterator_t<R>, Proj>> Comp =
+             ranges::less>
+    constexpr borrowed_subrange_t<R>
+      equal_range(R&& r, const T& value, Comp comp = {}, Proj proj = {});                           // since C++20
+
+  template<class I1, class I2, class O>
+    using set_union_result = in_in_out_result<I1, I2, O>;                                           // since C++20
+
+  template<input_iterator I1, sentinel_for<I1> S1, input_iterator I2, sentinel_for<I2> S2,
+           weakly_incrementable O, class Comp = ranges::less,
+           class Proj1 = identity, class Proj2 = identity>
+    requires mergeable<I1, I2, O, Comp, Proj1, Proj2>
+    constexpr set_union_result<I1, I2, O>
+      set_union(I1 first1, S1 last1, I2 first2, S2 last2, O result, Comp comp = {},
+                Proj1 proj1 = {}, Proj2 proj2 = {});                                                // since C++20
+
+  template<input_range R1, input_range R2, weakly_incrementable O,
+           class Comp = ranges::less, class Proj1 = identity, class Proj2 = identity>
+    requires mergeable<iterator_t<R1>, iterator_t<R2>, O, Comp, Proj1, Proj2>
+    constexpr set_union_result<borrowed_iterator_t<R1>, borrowed_iterator_t<R2>, O>
+      set_union(R1&& r1, R2&& r2, O result, Comp comp = {},
+                Proj1 proj1 = {}, Proj2 proj2 = {});                                                // since C++20
+
+  template<input_iterator I1, sentinel_for<I1> S1, input_iterator I2, sentinel_for<I2> S2,
+           class Proj1 = identity, class Proj2 = identity,
+           indirect_strict_weak_order<projected<I1, Proj1>, projected<I2, Proj2>> Comp =
+             ranges::less>
+    constexpr bool includes(I1 first1, S1 last1, I2 first2, S2 last2, Comp comp = {},
+                            Proj1 proj1 = {}, Proj2 proj2 = {});                                   // Since C++20
+
+  template<input_range R1, input_range R2, class Proj1 = identity,
+           class Proj2 = identity,
+           indirect_strict_weak_order<projected<iterator_t<R1>, Proj1>,
+                                      projected<iterator_t<R2>, Proj2>> Comp = ranges::less>
+    constexpr bool includes(R1&& r1, R2&& r2, Comp comp = {},
+                            Proj1 proj1 = {}, Proj2 proj2 = {});                                   // Since C++20
+
+  template<bidirectional_iterator I, sentinel_for<I> S, class Comp = ranges::less,
+           class Proj = identity>
+    requires sortable<I, Comp, Proj>
+    I inplace_merge(I first, I middle, S last, Comp comp = {}, Proj proj = {});                    // Since C++20
+
+  template<bidirectional_range R, class Comp = ranges::less, class Proj = identity>
+    requires sortable<iterator_t<R>, Comp, Proj>
+    borrowed_iterator_t<R>
+      inplace_merge(R&& r, iterator_t<R> middle, Comp comp = {},
+                    Proj proj = {});                                                               // Since C++20
+
+  template<permutable I, sentinel_for<I> S, class Proj = identity,
+           indirect_equivalence_relation<projected<I, Proj>> C = ranges::equal_to>
+    constexpr subrange<I> unique(I first, S last, C comp = {}, Proj proj = {});                    // Since C++20
+
+  template<forward_range R, class Proj = identity,
+           indirect_equivalence_relation<projected<iterator_t<R>, Proj>> C = ranges::equal_to>
+    requires permutable<iterator_t<R>>
+    constexpr borrowed_subrange_t<R>
+      unique(R&& r, C comp = {}, Proj proj = {});                                                  // Since C++20
+
+  template<input_iterator I, sentinel_for<I> S, weakly_incrementable O, class Proj = identity,
+           indirect_equivalence_relation<projected<I, Proj>> C = ranges::equal_to>
+    requires indirectly_copyable<I, O> &&
+             (forward_iterator<I> ||
+              (input_iterator<O> && same_as<iter_value_t<I>, iter_value_t<O>>) ||
+              indirectly_copyable_storable<I, O>)
+    constexpr unique_copy_result<I, O>
+      unique_copy(I first, S last, O result, C comp = {}, Proj proj = {});                         // Since C++20
+
+  template<input_range R, weakly_incrementable O, class Proj = identity,
+           indirect_equivalence_relation<projected<iterator_t<R>, Proj>> C = ranges::equal_to>
+    requires indirectly_copyable<iterator_t<R>, O> &&
+             (forward_iterator<iterator_t<R>> ||
+              (input_iterator<O> && same_as<range_value_t<R>, iter_value_t<O>>) ||
+              indirectly_copyable_storable<iterator_t<R>, O>)
+    constexpr unique_copy_result<borrowed_iterator_t<R>, O>
+      unique_copy(R&& r, O result, C comp = {}, Proj proj = {});                                   // Since C++20
+
+  template<class I, class O>
+      using remove_copy_result = in_out_result<I, O>;                                              // Since C++20
+
+  template<input_iterator I, sentinel_for<I> S, weakly_incrementable O, class T,
+           class Proj = identity>
+             indirect_binary_predicate<ranges::equal_to, projected<I, Proj>, const T*>
+    constexpr remove_copy_result<I, O>
+      remove_copy(I first, S last, O result, const T& value, Proj proj = {});                      // Since C++20
+
+  template<input_range R, weakly_incrementable O, class T, class Proj = identity>
+    requires indirectly_copyable<iterator_t<R>, O> &&
+             indirect_binary_predicate<ranges::equal_to,
+                                       projected<iterator_t<R>, Proj>, const T*>
+    constexpr remove_copy_result<borrowed_iterator_t<R>, O>
+      remove_copy(R&& r, O result, const T& value, Proj proj = {});                                // Since C++20
+
+  template<class I, class O>
+      using remove_copy_if_result = in_out_result<I, O>;                                           // Since C++20
+
+  template<input_iterator I, sentinel_for<I> S, weakly_incrementable O,
+           class Proj = identity, indirect_unary_predicate<projected<I, Proj>> Pred>
+    requires indirectly_copyable<I, O>
+    constexpr remove_copy_if_result<I, O>
+      remove_copy_if(I first, S last, O result, Pred pred, Proj proj = {});                        // Since C++20
+
+  template<input_range R, weakly_incrementable O, class Proj = identity,
+           indirect_unary_predicate<projected<iterator_t<R>, Proj>> Pred>
+    requires indirectly_copyable<iterator_t<R>, O>
+    constexpr remove_copy_if_result<borrowed_iterator_t<R>, O>
+      remove_copy_if(R&& r, O result, Pred pred, Proj proj = {});                                  // Since C++20
+
+  template<class I, class O>
+      using replace_copy_result = in_out_result<I, O>;                                             // Since C++20
+
+  template<input_iterator I, sentinel_for<I> S, class T1, class T2,
+           output_iterator<const T2&> O, class Proj = identity>
+    requires indirectly_copyable<I, O> &&
+             indirect_binary_predicate<ranges::equal_to, projected<I, Proj>, const T1*>
+    constexpr replace_copy_result<I, O>
+      replace_copy(I first, S last, O result, const T1& old_value, const T2& new_value,
+                   Proj proj = {});                                                                // Since C++20
+
+  template<input_range R, class T1, class T2, output_iterator<const T2&> O,
+           class Proj = identity>
+    requires indirectly_copyable<iterator_t<R>, O> &&
+             indirect_binary_predicate<ranges::equal_to,
+                                       projected<iterator_t<R>, Proj>, const T1*>
+    constexpr replace_copy_result<borrowed_iterator_t<R>, O>
+      replace_copy(R&& r, O result, const T1& old_value, const T2& new_value,
+                   Proj proj = {});                                                                // Since C++20
+
+  template<class I, class O>
+      using replace_copy_if_result = in_out_result<I, O>;                                          // Since C++20
+
+  template<input_iterator I, sentinel_for<I> S, class T, output_iterator<const T&> O,
+           class Proj = identity, indirect_unary_predicate<projected<I, Proj>> Pred>
+    requires indirectly_copyable<I, O>
+    constexpr replace_copy_if_result<I, O>
+      replace_copy_if(I first, S last, O result, Pred pred, const T& new_value,
+                      Proj proj = {});                                                             // Since C++20
+
+  template<input_range R, class T, output_iterator<const T&> O, class Proj = identity,
+           indirect_unary_predicate<projected<iterator_t<R>, Proj>> Pred>
+    requires indirectly_copyable<iterator_t<R>, O>
+    constexpr replace_copy_if_result<borrowed_iterator_t<R>, O>
+      replace_copy_if(R&& r, O result, Pred pred, const T& new_value,
+                      Proj proj = {});                                                             // Since C++20
+
+  template<class I>
+    using prev_permutation_result = in_found_result<I>;                                            // Since C++20
+
+  template<bidirectional_iterator I, sentinel_for<I> S, class Comp = ranges::less,
+           class Proj = identity>
+    requires sortable<I, Comp, Proj>
+    constexpr ranges::prev_permutation_result<I>
+      ranges::prev_permutation(I first, S last, Comp comp = {}, Proj proj = {});                   // Since C++20
+
+  template<bidirectional_range R, class Comp = ranges::less,
+           class Proj = identity>
+    requires sortable<iterator_t<R>, Comp, Proj>
+    constexpr ranges::prev_permutation_result<borrowed_iterator_t<R>>
+      ranges::prev_permutation(R&& r, Comp comp = {}, Proj proj = {});                             // Since C++20
+
+  template<class I>
+    using next_permutation_result = in_found_result<I>;                                            // Since C++20
+
+  template<bidirectional_iterator I, sentinel_for<I> S, class Comp = ranges::less,
+           class Proj = identity>
+    requires sortable<I, Comp, Proj>
+    constexpr ranges::next_permutation_result<I>
+      ranges::next_permutation(I first, S last, Comp comp = {}, Proj proj = {});                   // Since C++20
+
+  template<bidirectional_range R, class Comp = ranges::less,
+           class Proj = identity>
+    requires sortable<iterator_t<R>, Comp, Proj>
+    constexpr ranges::next_permutation_result<borrowed_iterator_t<R>>
+      ranges::next_permutation(R&& r, Comp comp = {}, Proj proj = {});                             // Since C++20
+
 }
 
 template <class InputIterator, class Predicate>
@@ -213,10 +1218,35 @@ template <class BidirectionalIterator1, class BidirectionalIterator2>
     copy_backward(BidirectionalIterator1 first, BidirectionalIterator1 last,
                   BidirectionalIterator2 result);
 
+// [alg.move], move
+template<class InputIterator, class OutputIterator>
+    constexpr OutputIterator move(InputIterator first, InputIterator last,
+                                OutputIterator result);
+
+template<class BidirectionalIterator1, class BidirectionalIterator2>
+    constexpr BidirectionalIterator2
+    move_backward(BidirectionalIterator1 first, BidirectionalIterator1 last,
+                  BidirectionalIterator2 result);
+
 template <class ForwardIterator1, class ForwardIterator2>
     constexpr ForwardIterator2    // constexpr in C++20
     swap_ranges(ForwardIterator1 first1, ForwardIterator1 last1, ForwardIterator2 first2);
 
+namespace ranges {
+    template<class I1, class I2>
+    using swap_ranges_result = in_in_result<I1, I2>;
+
+template<input_iterator I1, sentinel_for<I1> S1, input_iterator I2, sentinel_for<I2> S2>
+        requires indirectly_swappable<I1, I2>
+    constexpr ranges::swap_ranges_result<I1, I2>
+        swap_ranges(I1 first1, S1 last1, I2 first2, S2 last2);
+
+template<input_range R1, input_range R2>
+        requires indirectly_swappable<iterator_t<R1>, iterator_t<R2>>
+    constexpr ranges::swap_ranges_result<borrowed_iterator_t<R1>, borrowed_iterator_t<R2>>
+        swap_ranges(R1&& r1, R2&& r2);
+}
+
 template <class ForwardIterator1, class ForwardIterator2>
     constexpr void                // constexpr in C++20
     iter_swap(ForwardIterator1 a, ForwardIterator2 b);
@@ -669,24 +1699,15 @@ template <class BidirectionalIterator>
 template <class BidirectionalIterator, class Compare>
     constexpr bool     // constexpr in C++20
     prev_permutation(BidirectionalIterator first, BidirectionalIterator last, Compare comp);
-
 }  // std
 
 */
 
+#include <__assert> // all public C++ headers provide the assertion handler
 #include <__config>
 #include <__debug>
-#include <__bits> // __libcpp_clz
 #include <cstddef>
-#include <cstring>
-#include <functional>
-#include <initializer_list>
-#include <utility> // needed to provide swap_ranges.
-#include <memory>
-#include <iterator>
-#include <memory>
 #include <type_traits>
-#include <utility> // swap_ranges
 #include <version>
 
 #include <__algorithm/adjacent_find.h>
@@ -704,8 +1725,8 @@ template <class BidirectionalIterator, class Compare>
 #include <__algorithm/count_if.h>
 #include <__algorithm/equal.h>
 #include <__algorithm/equal_range.h>
-#include <__algorithm/fill_n.h>
 #include <__algorithm/fill.h>
+#include <__algorithm/fill_n.h>
 #include <__algorithm/find.h>
 #include <__algorithm/find_end.h>
 #include <__algorithm/find_first_of.h>
@@ -713,9 +1734,15 @@ template <class BidirectionalIterator, class Compare>
 #include <__algorithm/find_if_not.h>
 #include <__algorithm/for_each.h>
 #include <__algorithm/for_each_n.h>
-#include <__algorithm/generate_n.h>
 #include <__algorithm/generate.h>
+#include <__algorithm/generate_n.h>
 #include <__algorithm/half_positive.h>
+#include <__algorithm/in_found_result.h>
+#include <__algorithm/in_fun_result.h>
+#include <__algorithm/in_in_out_result.h>
+#include <__algorithm/in_in_result.h>
+#include <__algorithm/in_out_out_result.h>
+#include <__algorithm/in_out_result.h>
 #include <__algorithm/includes.h>
 #include <__algorithm/inplace_merge.h>
 #include <__algorithm/is_heap.h>
@@ -733,6 +1760,7 @@ template <class BidirectionalIterator, class Compare>
 #include <__algorithm/merge.h>
 #include <__algorithm/min.h>
 #include <__algorithm/min_element.h>
+#include <__algorithm/min_max_result.h>
 #include <__algorithm/minmax.h>
 #include <__algorithm/minmax_element.h>
 #include <__algorithm/mismatch.h>
@@ -749,9 +1777,91 @@ template <class BidirectionalIterator, class Compare>
 #include <__algorithm/pop_heap.h>
 #include <__algorithm/prev_permutation.h>
 #include <__algorithm/push_heap.h>
+#include <__algorithm/ranges_adjacent_find.h>
+#include <__algorithm/ranges_all_of.h>
+#include <__algorithm/ranges_any_of.h>
+#include <__algorithm/ranges_binary_search.h>
+#include <__algorithm/ranges_clamp.h>
+#include <__algorithm/ranges_copy.h>
+#include <__algorithm/ranges_copy_backward.h>
+#include <__algorithm/ranges_copy_if.h>
+#include <__algorithm/ranges_copy_n.h>
+#include <__algorithm/ranges_count.h>
+#include <__algorithm/ranges_count_if.h>
+#include <__algorithm/ranges_equal.h>
+#include <__algorithm/ranges_equal_range.h>
+#include <__algorithm/ranges_fill.h>
+#include <__algorithm/ranges_fill_n.h>
 #include <__algorithm/ranges_find.h>
+#include <__algorithm/ranges_find_end.h>
+#include <__algorithm/ranges_find_first_of.h>
 #include <__algorithm/ranges_find_if.h>
 #include <__algorithm/ranges_find_if_not.h>
+#include <__algorithm/ranges_for_each.h>
+#include <__algorithm/ranges_for_each_n.h>
+#include <__algorithm/ranges_generate.h>
+#include <__algorithm/ranges_generate_n.h>
+#include <__algorithm/ranges_includes.h>
+#include <__algorithm/ranges_inplace_merge.h>
+#include <__algorithm/ranges_is_heap.h>
+#include <__algorithm/ranges_is_heap_until.h>
+#include <__algorithm/ranges_is_partitioned.h>
+#include <__algorithm/ranges_is_permutation.h>
+#include <__algorithm/ranges_is_sorted.h>
+#include <__algorithm/ranges_is_sorted_until.h>
+#include <__algorithm/ranges_lexicographical_compare.h>
+#include <__algorithm/ranges_lower_bound.h>
+#include <__algorithm/ranges_make_heap.h>
+#include <__algorithm/ranges_max.h>
+#include <__algorithm/ranges_max_element.h>
+#include <__algorithm/ranges_merge.h>
+#include <__algorithm/ranges_min.h>
+#include <__algorithm/ranges_min_element.h>
+#include <__algorithm/ranges_minmax.h>
+#include <__algorithm/ranges_minmax_element.h>
+#include <__algorithm/ranges_mismatch.h>
+#include <__algorithm/ranges_move.h>
+#include <__algorithm/ranges_move_backward.h>
+#include <__algorithm/ranges_next_permutation.h>
+#include <__algorithm/ranges_none_of.h>
+#include <__algorithm/ranges_nth_element.h>
+#include <__algorithm/ranges_partial_sort.h>
+#include <__algorithm/ranges_partial_sort_copy.h>
+#include <__algorithm/ranges_partition.h>
+#include <__algorithm/ranges_partition_copy.h>
+#include <__algorithm/ranges_partition_point.h>
+#include <__algorithm/ranges_pop_heap.h>
+#include <__algorithm/ranges_prev_permutation.h>
+#include <__algorithm/ranges_push_heap.h>
+#include <__algorithm/ranges_remove.h>
+#include <__algorithm/ranges_remove_copy.h>
+#include <__algorithm/ranges_remove_copy_if.h>
+#include <__algorithm/ranges_remove_if.h>
+#include <__algorithm/ranges_replace.h>
+#include <__algorithm/ranges_replace_copy.h>
+#include <__algorithm/ranges_replace_copy_if.h>
+#include <__algorithm/ranges_replace_if.h>
+#include <__algorithm/ranges_reverse.h>
+#include <__algorithm/ranges_reverse_copy.h>
+#include <__algorithm/ranges_rotate.h>
+#include <__algorithm/ranges_rotate_copy.h>
+#include <__algorithm/ranges_sample.h>
+#include <__algorithm/ranges_search.h>
+#include <__algorithm/ranges_search_n.h>
+#include <__algorithm/ranges_set_difference.h>
+#include <__algorithm/ranges_set_intersection.h>
+#include <__algorithm/ranges_set_symmetric_difference.h>
+#include <__algorithm/ranges_set_union.h>
+#include <__algorithm/ranges_shuffle.h>
+#include <__algorithm/ranges_sort.h>
+#include <__algorithm/ranges_sort_heap.h>
+#include <__algorithm/ranges_stable_partition.h>
+#include <__algorithm/ranges_stable_sort.h>
+#include <__algorithm/ranges_swap_ranges.h>
+#include <__algorithm/ranges_transform.h>
+#include <__algorithm/ranges_unique.h>
+#include <__algorithm/ranges_unique_copy.h>
+#include <__algorithm/ranges_upper_bound.h>
 #include <__algorithm/remove.h>
 #include <__algorithm/remove_copy.h>
 #include <__algorithm/remove_copy_if.h>
@@ -781,22 +1891,36 @@ template <class BidirectionalIterator, class Compare>
 #include <__algorithm/stable_sort.h>
 #include <__algorithm/swap_ranges.h>
 #include <__algorithm/transform.h>
-#include <__algorithm/unique_copy.h>
 #include <__algorithm/unique.h>
+#include <__algorithm/unique_copy.h>
 #include <__algorithm/unwrap_iter.h>
 #include <__algorithm/upper_bound.h>
 
+// standard-mandated includes
+
+// [algorithm.syn]
+#include <initializer_list>
+
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
+#  pragma GCC system_header
 #endif
 
-_LIBCPP_PUSH_MACROS
-#include <__undef_macros>
+#if defined(_LIBCPP_HAS_PARALLEL_ALGORITHMS) && _LIBCPP_STD_VER >= 17
+#  include <__pstl_algorithm>
+#endif
 
-_LIBCPP_POP_MACROS
+#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 17
+#  include <chrono>
+#endif
 
-#if defined(_LIBCPP_HAS_PARALLEL_ALGORITHMS) && _LIBCPP_STD_VER >= 17
-#   include <__pstl_algorithm>
+#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
+#  include <atomic>
+#  include <concepts>
+#  include <cstring>
+#  include <iterator>
+#  include <memory>
+#  include <stdexcept>
+#  include <utility>
 #endif
 
 #endif // _LIBCPP_ALGORITHM
diff --git a/gnu/llvm/libcxx/include/experimental/filesystem b/gnu/llvm/libcxx/include/experimental/filesystem
deleted file mode 100644
index d2e6237df34..00000000000
--- a/gnu/llvm/libcxx/include/experimental/filesystem
+++ /dev/null
@@ -1,256 +0,0 @@
-// -*- C++ -*-
-//===--------------------------- filesystem -------------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-#ifndef _LIBCPP_EXPERIMENTAL_FILESYSTEM
-#define _LIBCPP_EXPERIMENTAL_FILESYSTEM
-/*
-    filesystem synopsis
-
-    namespace std { namespace experimental { namespace filesystem { inline namespace v1 {
-
-    class path;
-
-    void swap(path& lhs, path& rhs) noexcept;
-    size_t hash_value(const path& p) noexcept;
-
-    bool operator==(const path& lhs, const path& rhs) noexcept;
-    bool operator!=(const path& lhs, const path& rhs) noexcept;
-    bool operator< (const path& lhs, const path& rhs) noexcept;
-    bool operator<=(const path& lhs, const path& rhs) noexcept;
-    bool operator> (const path& lhs, const path& rhs) noexcept;
-    bool operator>=(const path& lhs, const path& rhs) noexcept;
-
-    path operator/ (const path& lhs, const path& rhs);
-
-    // fs.path.io operators are friends of path.
-    template <class charT, class traits>
-    friend basic_ostream<charT, traits>&
-    operator<<(basic_ostream<charT, traits>& os, const path& p);
-
-    template <class charT, class traits>
-    friend basic_istream<charT, traits>&
-    operator>>(basic_istream<charT, traits>& is, path& p);
-
-    template <class Source>
-      path u8path(const Source& source);
-    template <class InputIterator>
-      path u8path(InputIterator first, InputIterator last);
-
-    class filesystem_error;
-    class directory_entry;
-
-    class directory_iterator;
-
-    // enable directory_iterator range-based for statements
-    directory_iterator begin(directory_iterator iter) noexcept;
-    directory_iterator end(const directory_iterator&) noexcept;
-
-    class recursive_directory_iterator;
-
-    // enable recursive_directory_iterator range-based for statements
-    recursive_directory_iterator begin(recursive_directory_iterator iter) noexcept;
-    recursive_directory_iterator end(const recursive_directory_iterator&) noexcept;
-
-    class file_status;
-
-    struct space_info
-    {
-      uintmax_t capacity;
-      uintmax_t free;
-      uintmax_t available;
-    };
-
-    enum class file_type;
-    enum class perms;
-    enum class perm_options;
-    enum class copy_options;
-    enum class directory_options;
-
-    typedef chrono::time_point<trivial-clock>  file_time_type;
-
-    // operational functions
-
-    path absolute(const path& p);
-    path absolute(const path& p, error_code &ec);
-
-    path canonical(const path& p);
-    path canonical(const path& p, error_code& ec);
-
-    void copy(const path& from, const path& to);
-    void copy(const path& from, const path& to, error_code& ec);
-    void copy(const path& from, const path& to, copy_options options);
-    void copy(const path& from, const path& to, copy_options options,
-                   error_code& ec);
-
-    bool copy_file(const path& from, const path& to);
-    bool copy_file(const path& from, const path& to, error_code& ec);
-    bool copy_file(const path& from, const path& to, copy_options option);
-    bool copy_file(const path& from, const path& to, copy_options option,
-                           error_code& ec);
-
-    void copy_symlink(const path& existing_symlink, const path& new_symlink);
-    void copy_symlink(const path& existing_symlink, const path& new_symlink,
-                              error_code& ec) noexcept;
-
-    bool create_directories(const path& p);
-    bool create_directories(const path& p, error_code& ec);
-
-    bool create_directory(const path& p);
-    bool create_directory(const path& p, error_code& ec) noexcept;
-
-    bool create_directory(const path& p, const path& attributes);
-    bool create_directory(const path& p, const path& attributes,
-                                  error_code& ec) noexcept;
-
-    void create_directory_symlink(const path& to, const path& new_symlink);
-    void create_directory_symlink(const path& to, const path& new_symlink,
-                                          error_code& ec) noexcept;
-
-    void create_hard_link(const path& to, const path& new_hard_link);
-    void create_hard_link(const path& to, const path& new_hard_link,
-                                  error_code& ec) noexcept;
-
-    void create_symlink(const path& to, const path& new_symlink);
-    void create_symlink(const path& to, const path& new_symlink,
-                                error_code& ec) noexcept;
-
-    path current_path();
-    path current_path(error_code& ec);
-    void current_path(const path& p);
-    void current_path(const path& p, error_code& ec) noexcept;
-
-    bool exists(file_status s) noexcept;
-    bool exists(const path& p);
-    bool exists(const path& p, error_code& ec) noexcept;
-
-    bool equivalent(const path& p1, const path& p2);
-    bool equivalent(const path& p1, const path& p2, error_code& ec) noexcept;
-
-    uintmax_t    file_size(const path& p);
-    uintmax_t    file_size(const path& p, error_code& ec) noexcept;
-
-    uintmax_t    hard_link_count(const path& p);
-    uintmax_t    hard_link_count(const path& p, error_code& ec) noexcept;
-
-    bool is_block_file(file_status s) noexcept;
-    bool is_block_file(const path& p);
-    bool is_block_file(const path& p, error_code& ec) noexcept;
-
-    bool is_character_file(file_status s) noexcept;
-    bool is_character_file(const path& p);
-    bool is_character_file(const path& p, error_code& ec) noexcept;
-
-    bool is_directory(file_status s) noexcept;
-    bool is_directory(const path& p);
-    bool is_directory(const path& p, error_code& ec) noexcept;
-
-    bool is_empty(const path& p);
-    bool is_empty(const path& p, error_code& ec) noexcept;
-
-    bool is_fifo(file_status s) noexcept;
-    bool is_fifo(const path& p);
-    bool is_fifo(const path& p, error_code& ec) noexcept;
-
-    bool is_other(file_status s) noexcept;
-    bool is_other(const path& p);
-    bool is_other(const path& p, error_code& ec) noexcept;
-
-    bool is_regular_file(file_status s) noexcept;
-    bool is_regular_file(const path& p);
-    bool is_regular_file(const path& p, error_code& ec) noexcept;
-
-    bool is_socket(file_status s) noexcept;
-    bool is_socket(const path& p);
-    bool is_socket(const path& p, error_code& ec) noexcept;
-
-    bool is_symlink(file_status s) noexcept;
-    bool is_symlink(const path& p);
-    bool is_symlink(const path& p, error_code& ec) noexcept;
-
-    file_time_type  last_write_time(const path& p);
-    file_time_type  last_write_time(const path& p, error_code& ec) noexcept;
-    void last_write_time(const path& p, file_time_type new_time);
-    void last_write_time(const path& p, file_time_type new_time,
-                                 error_code& ec) noexcept;
-
-    void permissions(const path& p, perms prms,
-                     perm_options opts=perm_options::replace);
-    void permissions(const path& p, perms prms, error_code& ec) noexcept;
-    void permissions(const path& p, perms prms, perm_options opts,
-                     error_code& ec);
-
-    path proximate(const path& p, error_code& ec);
-    path proximate(const path& p, const path& base = current_path());
-    path proximate(const path& p, const path& base, error_code &ec);
-
-    path read_symlink(const path& p);
-    path read_symlink(const path& p, error_code& ec);
-
-    path relative(const path& p, error_code& ec);
-    path relative(const path& p, const path& base=current_path());
-    path relative(const path& p, const path& base, error_code& ec);
-
-    bool remove(const path& p);
-    bool remove(const path& p, error_code& ec) noexcept;
-
-    uintmax_t    remove_all(const path& p);
-    uintmax_t    remove_all(const path& p, error_code& ec);
-
-    void rename(const path& from, const path& to);
-    void rename(const path& from, const path& to, error_code& ec) noexcept;
-
-    void resize_file(const path& p, uintmax_t size);
-    void resize_file(const path& p, uintmax_t size, error_code& ec) noexcept;
-
-    space_info   space(const path& p);
-    space_info   space(const path& p, error_code& ec) noexcept;
-
-    file_status  status(const path& p);
-    file_status  status(const path& p, error_code& ec) noexcept;
-
-    bool status_known(file_status s) noexcept;
-
-    file_status  symlink_status(const path& p);
-    file_status  symlink_status(const path& p, error_code& ec) noexcept;
-
-    path temp_directory_path();
-    path temp_directory_path(error_code& ec);
-
-    path weakly_canonical(path const& p);
-    path weakly_canonical(path const& p, error_code& ec);
-
-
-} } } }  // namespaces std::experimental::filesystem::v1
-
-*/
-
-#include <experimental/__config>
-#include <filesystem>
-
-#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
-#endif
-
-_LIBCPP_PUSH_MACROS
-#include <__undef_macros>
-
-#ifndef _LIBCPP_CXX03_LANG
-
-#define __cpp_lib_experimental_filesystem 201406
-
-_LIBCPP_BEGIN_NAMESPACE_EXPERIMENTAL_FILESYSTEM
-
-using namespace _VSTD_FS;
-
-_LIBCPP_END_NAMESPACE_EXPERIMENTAL_FILESYSTEM
-
-#endif // !_LIBCPP_CXX03_LANG
-
-_LIBCPP_POP_MACROS
-
-#endif // _LIBCPP_EXPERIMENTAL_FILESYSTEM
diff --git a/gnu/llvm/libcxx/include/locale b/gnu/llvm/libcxx/include/locale
index 8e584005da0..874866f6982 100644
--- a/gnu/llvm/libcxx/include/locale
+++ b/gnu/llvm/libcxx/include/locale
@@ -1,5 +1,5 @@
 // -*- C++ -*-
-//===-------------------------- locale ------------------------------------===//
+//===----------------------------------------------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
@@ -187,26 +187,36 @@ template <class charT> class messages_byname;
 
 */
 
+#include <__algorithm/copy.h>
+#include <__algorithm/equal.h>
+#include <__algorithm/find.h>
+#include <__algorithm/max.h>
+#include <__algorithm/reverse.h>
+#include <__algorithm/unwrap_iter.h>
+#include <__assert> // all public C++ headers provide the assertion handler
 #include <__config>
 #include <__debug>
+#include <__iterator/access.h>
+#include <__iterator/back_insert_iterator.h>
+#include <__iterator/istreambuf_iterator.h>
+#include <__iterator/ostreambuf_iterator.h>
 #include <__locale>
-#include <algorithm>
-#ifndef __APPLE__
-# include <cstdarg>
-#endif
+#include <__memory/unique_ptr.h>
 #include <cstdio>
 #include <cstdlib>
 #include <ctime>
 #include <ios>
-#include <iterator>
 #include <limits>
-#include <memory>
+#include <new>
 #include <streambuf>
 #include <version>
 
+// TODO: Fix __bsd_locale_defaults.h
+// NOLINTBEGIN(libcpp-robust-against-adl)
+
 #if defined(__unix__) || (defined(__APPLE__) && defined(__MACH__))
 // Most unix variants have catopen.  These are the specific ones that don't.
-#  if !defined(__BIONIC__) && !defined(_NEWLIB_VERSION)
+#  if !defined(__BIONIC__) && !defined(_NEWLIB_VERSION) && !defined(__EMSCRIPTEN__)
 #    define _LIBCPP_HAS_CATOPEN 1
 #    include <nl_types.h>
 #  endif
@@ -219,7 +229,7 @@ template <class charT> class messages_byname;
 #endif
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
+#  pragma GCC system_header
 #endif
 
 _LIBCPP_PUSH_MACROS
@@ -230,7 +240,7 @@ _LIBCPP_BEGIN_NAMESPACE_STD
 
 #if defined(__APPLE__) || defined(__FreeBSD__)
 #  define _LIBCPP_GET_C_LOCALE 0
-#elif defined(__CloudABI__) || defined(__NetBSD__)
+#elif defined(__NetBSD__)
 #  define _LIBCPP_GET_C_LOCALE LC_C_LOCALE
 #else
 #  define _LIBCPP_GET_C_LOCALE __cloc()
@@ -258,7 +268,7 @@ _LIBCPP_BEGIN_NAMESPACE_STD
 //  If the input is "a", the first keyword matches and eofbit is set.
 //  If the input is "abc", no match is found and "ab" are consumed.
 template <class _InputIterator, class _ForwardIterator, class _Ctype>
-_LIBCPP_HIDDEN
+_LIBCPP_HIDE_FROM_ABI
 _ForwardIterator
 __scan_keyword(_InputIterator& __b, _InputIterator __e,
                _ForwardIterator __kb, _ForwardIterator __ke,
@@ -416,11 +426,11 @@ struct __num_get
                   unsigned& __dc, _CharT __thousands_sep, const string& __grouping,
                   unsigned* __g, unsigned*& __g_end, const _CharT* __atoms);
 private:
-    template<typename T>
-    const T* __do_widen_p(ios_base& __iob, T* __atoms) const
+    template<typename _Tp>
+    const _Tp* __do_widen_p(ios_base& __iob, _Tp* __atoms) const
     {
       locale __loc = __iob.getloc();
-      use_facet<ctype<T> >(__loc).widen(__src, __src + 26, __atoms);
+      use_facet<ctype<_Tp> >(__loc).widen(__src, __src + 26, __atoms);
       return __atoms;
     }
 
@@ -439,8 +449,8 @@ string
 __num_get<_CharT>::__stage2_int_prep(ios_base& __iob, _CharT* __atoms, _CharT& __thousands_sep)
 {
     locale __loc = __iob.getloc();
-    use_facet<ctype<_CharT> >(__loc).widen(__src, __src + 26, __atoms);
-    const numpunct<_CharT>& __np = use_facet<numpunct<_CharT> >(__loc);
+    std::use_facet<ctype<_CharT> >(__loc).widen(__src, __src + 26, __atoms);
+    const numpunct<_CharT>& __np = std::use_facet<numpunct<_CharT> >(__loc);
     __thousands_sep = __np.thousands_sep();
     return __np.grouping();
 }
@@ -452,8 +462,8 @@ __num_get<_CharT>::__stage2_float_prep(ios_base& __iob, _CharT* __atoms, _CharT&
                     _CharT& __thousands_sep)
 {
     locale __loc = __iob.getloc();
-    use_facet<ctype<_CharT> >(__loc).widen(__src, __src + 32, __atoms);
-    const numpunct<_CharT>& __np = use_facet<numpunct<_CharT> >(__loc);
+    std::use_facet<ctype<_CharT> >(__loc).widen(__src, __src + 32, __atoms);
+    const numpunct<_CharT>& __np = std::use_facet<numpunct<_CharT> >(__loc);
     __decimal_point = __np.decimal_point();
     __thousands_sep = __np.thousands_sep();
     return __np.grouping();
@@ -487,7 +497,7 @@ __num_get<_CharT>::__stage2_int_loop(_CharT __ct, int __base, char* __a, char*&
         }
         return 0;
     }
-    ptrdiff_t __f = find(__atoms, __atoms + 26, __ct) - __atoms;
+    ptrdiff_t __f = std::find(__atoms, __atoms + 26, __ct) - __atoms;
     if (__f >= 24)
         return -1;
     switch (__base)
@@ -540,13 +550,13 @@ __num_get<_CharT>::__stage2_float_loop(_CharT __ct, bool& __in_units, char& __ex
         }
         return 0;
     }
-    ptrdiff_t __f = find(__atoms, __atoms + 32, __ct) - __atoms;
+    ptrdiff_t __f = std::find(__atoms, __atoms + 32, __ct) - __atoms;
     if (__f >= 32)
         return -1;
     char __x = __src[__f];
     if (__x == '-' || __x == '+')
     {
-        if (__a_end == __a || (__a_end[-1] & 0x5F) == (__exp & 0x7F))
+        if (__a_end == __a || (std::toupper(__a_end[-1]) == std::toupper(__exp)))
         {
             *__a_end++ = __x;
             return 0;
@@ -555,9 +565,9 @@ __num_get<_CharT>::__stage2_float_loop(_CharT __ct, bool& __in_units, char& __ex
     }
     if (__x == 'x' || __x == 'X')
         __exp = 'P';
-    else if ((__x & 0x5F) == __exp)
+    else if (std::toupper(__x) == __exp)
     {
-        __exp |= (char) 0x80;
+        __exp = std::tolower(__exp);
         if (__in_units)
         {
             __in_units = false;
@@ -572,8 +582,10 @@ __num_get<_CharT>::__stage2_float_loop(_CharT __ct, bool& __in_units, char& __ex
     return 0;
 }
 
-_LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(struct _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS __num_get<char>)
-_LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(struct _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS __num_get<wchar_t>)
+extern template struct _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS __num_get<char>;
+#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
+extern template struct _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS __num_get<wchar_t>;
+#endif
 
 template <class _CharT, class _InputIterator = istreambuf_iterator<_CharT> >
 class _LIBCPP_TEMPLATE_VIS num_get
@@ -668,8 +680,7 @@ public:
     static locale::id id;
 
 protected:
-    _LIBCPP_INLINE_VISIBILITY
-    ~num_get() {}
+    _LIBCPP_HIDE_FROM_ABI_VIRTUAL ~num_get() override {}
 
     template <class _Fp>
     _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS
@@ -738,17 +749,17 @@ locale::id
 num_get<_CharT, _InputIterator>::id;
 
 template <class _Tp>
-_LIBCPP_HIDDEN _Tp
+_LIBCPP_HIDE_FROM_ABI _Tp
 __num_get_signed_integral(const char* __a, const char* __a_end,
                           ios_base::iostate& __err, int __base)
 {
     if (__a != __a_end)
     {
-        typename remove_reference<decltype(errno)>::type __save_errno = errno;
+        __libcpp_remove_reference_t<decltype(errno)> __save_errno = errno;
         errno = 0;
         char *__p2;
         long long __ll = strtoll_l(__a, &__p2, __base, _LIBCPP_GET_C_LOCALE);
-        typename remove_reference<decltype(errno)>::type __current_errno = errno;
+        __libcpp_remove_reference_t<decltype(errno)> __current_errno = errno;
         if (__current_errno == 0)
             errno = __save_errno;
         if (__p2 != __a_end)
@@ -773,7 +784,7 @@ __num_get_signed_integral(const char* __a, const char* __a_end,
 }
 
 template <class _Tp>
-_LIBCPP_HIDDEN _Tp
+_LIBCPP_HIDE_FROM_ABI _Tp
 __num_get_unsigned_integral(const char* __a, const char* __a_end,
                             ios_base::iostate& __err, int __base)
 {
@@ -784,11 +795,11 @@ __num_get_unsigned_integral(const char* __a, const char* __a_end,
           __err = ios_base::failbit;
           return 0;
         }
-        typename remove_reference<decltype(errno)>::type __save_errno = errno;
+        __libcpp_remove_reference_t<decltype(errno)> __save_errno = errno;
         errno = 0;
         char *__p2;
         unsigned long long __ll = strtoull_l(__a, &__p2, __base, _LIBCPP_GET_C_LOCALE);
-        typename remove_reference<decltype(errno)>::type __current_errno = errno;
+        __libcpp_remove_reference_t<decltype(errno)> __current_errno = errno;
         if (__current_errno == 0)
             errno = __save_errno;
         if (__p2 != __a_end)
@@ -832,17 +843,17 @@ long double __do_strtod<long double>(const char* __a, char** __p2) {
 }
 
 template <class _Tp>
-_LIBCPP_HIDDEN
+_LIBCPP_HIDE_FROM_ABI
 _Tp
 __num_get_float(const char* __a, const char* __a_end, ios_base::iostate& __err)
 {
     if (__a != __a_end)
     {
-        typename remove_reference<decltype(errno)>::type __save_errno = errno;
+        __libcpp_remove_reference_t<decltype(errno)> __save_errno = errno;
         errno = 0;
         char *__p2;
-        _Tp __ld = __do_strtod<_Tp>(__a, &__p2);
-        typename remove_reference<decltype(errno)>::type __current_errno = errno;
+        _Tp __ld = std::__do_strtod<_Tp>(__a, &__p2);
+        __libcpp_remove_reference_t<decltype(errno)> __current_errno = errno;
         if (__current_errno == 0)
             errno = __save_errno;
         if (__p2 != __a_end)
@@ -884,8 +895,8 @@ num_get<_CharT, _InputIterator>::do_get(iter_type __b, iter_type __e,
         }
         return __b;
     }
-    const ctype<_CharT>& __ct = use_facet<ctype<_CharT> >(__iob.getloc());
-    const numpunct<_CharT>& __np = use_facet<numpunct<_CharT> >(__iob.getloc());
+    const ctype<_CharT>& __ct = std::use_facet<ctype<_CharT> >(__iob.getloc());
+    const numpunct<_CharT>& __np = std::use_facet<numpunct<_CharT> >(__iob.getloc());
     typedef typename numpunct<_CharT>::string_type string_type;
     const string_type __names[2] = {__np.truename(), __np.falsename()};
     const string_type* __i = _VSTD::__scan_keyword(__b, __e, __names, __names+2,
@@ -942,7 +953,7 @@ num_get<_CharT, _InputIterator>::__do_get_signed(iter_type __b, iter_type __e,
     if (__grouping.size() != 0 && __g_end-__g < __num_get_base::__num_get_buf_sz)
         *__g_end++ = __dc;
     // Stage 3
-    __v = __num_get_signed_integral<_Signed>(__a, __a_end, __err, __base);
+    __v = std::__num_get_signed_integral<_Signed>(__a, __a_end, __err, __base);
     // Digit grouping checked
     __check_grouping(__grouping, __g, __g_end, __err);
     // EOF checked
@@ -999,7 +1010,7 @@ num_get<_CharT, _InputIterator>::__do_get_unsigned(iter_type __b, iter_type __e,
     if (__grouping.size() != 0 && __g_end-__g < __num_get_base::__num_get_buf_sz)
         *__g_end++ = __dc;
     // Stage 3
-    __v = __num_get_unsigned_integral<_Unsigned>(__a, __a_end, __err, __base);
+    __v = std::__num_get_unsigned_integral<_Unsigned>(__a, __a_end, __err, __base);
     // Digit grouping checked
     __check_grouping(__grouping, __g, __g_end, __err);
     // EOF checked
@@ -1054,7 +1065,7 @@ num_get<_CharT, _InputIterator>::__do_get_floating_point(iter_type __b, iter_typ
     if (__grouping.size() != 0 && __in_units && __g_end-__g < __num_get_base::__num_get_buf_sz)
         *__g_end++ = __dc;
     // Stage 3
-    __v = __num_get_float<_Fp>(__a, __a_end, __err);
+    __v = std::__num_get_float<_Fp>(__a, __a_end, __err);
     // Digit grouping checked
     __check_grouping(__grouping, __g, __g_end, __err);
     // EOF checked
@@ -1076,8 +1087,8 @@ num_get<_CharT, _InputIterator>::do_get(iter_type __b, iter_type __e,
     char_type __atoms[26];
     char_type __thousands_sep = 0;
     string __grouping;
-    use_facet<ctype<_CharT> >(__iob.getloc()).widen(__num_get_base::__src,
-                                                    __num_get_base::__src + 26, __atoms);
+    std::use_facet<ctype<_CharT> >(__iob.getloc()).widen(__num_get_base::__src,
+                                                         __num_get_base::__src + 26, __atoms);
     string __buf;
     __buf.resize(__buf.capacity());
     char* __a = &__buf[0];
@@ -1110,8 +1121,10 @@ num_get<_CharT, _InputIterator>::do_get(iter_type __b, iter_type __e,
     return __b;
 }
 
-_LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS num_get<char>)
-_LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS num_get<wchar_t>)
+extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS num_get<char>;
+#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
+extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS num_get<wchar_t>;
+#endif
 
 struct _LIBCPP_TYPE_VIS __num_put_base
 {
@@ -1142,8 +1155,8 @@ __num_put<_CharT>::__widen_and_group_int(char* __nb, char* __np, char* __ne,
                                          _CharT* __ob, _CharT*& __op, _CharT*& __oe,
                                          const locale& __loc)
 {
-    const ctype<_CharT>&    __ct = use_facet<ctype<_CharT> >   (__loc);
-    const numpunct<_CharT>& __npt = use_facet<numpunct<_CharT> >(__loc);
+    const ctype<_CharT>&    __ct = std::use_facet<ctype<_CharT> >   (__loc);
+    const numpunct<_CharT>& __npt = std::use_facet<numpunct<_CharT> >(__loc);
     string __grouping = __npt.grouping();
     if (__grouping.empty())
     {
@@ -1162,7 +1175,7 @@ __num_put<_CharT>::__widen_and_group_int(char* __nb, char* __np, char* __ne,
             *__oe++ = __ct.widen(*__nf++);
             *__oe++ = __ct.widen(*__nf++);
         }
-        reverse(__nf, __ne);
+        std::reverse(__nf, __ne);
         _CharT __thousands_sep = __npt.thousands_sep();
         unsigned __dc = 0;
         unsigned __dg = 0;
@@ -1179,7 +1192,7 @@ __num_put<_CharT>::__widen_and_group_int(char* __nb, char* __np, char* __ne,
             *__oe++ = __ct.widen(*__p);
             ++__dc;
         }
-        reverse(__ob + (__nf - __nb), __oe);
+        std::reverse(__ob + (__nf - __nb), __oe);
     }
     if (__np == __ne)
         __op = __oe;
@@ -1193,8 +1206,8 @@ __num_put<_CharT>::__widen_and_group_float(char* __nb, char* __np, char* __ne,
                                            _CharT* __ob, _CharT*& __op, _CharT*& __oe,
                                            const locale& __loc)
 {
-    const ctype<_CharT>&    __ct = use_facet<ctype<_CharT> >   (__loc);
-    const numpunct<_CharT>& __npt = use_facet<numpunct<_CharT> >(__loc);
+    const ctype<_CharT>&    __ct = std::use_facet<ctype<_CharT> >   (__loc);
+    const numpunct<_CharT>& __npt = std::use_facet<numpunct<_CharT> >(__loc);
     string __grouping = __npt.grouping();
     __oe = __ob;
     char* __nf = __nb;
@@ -1223,7 +1236,7 @@ __num_put<_CharT>::__widen_and_group_float(char* __nb, char* __np, char* __ne,
     }
     else
     {
-        reverse(__nf, __ns);
+        std::reverse(__nf, __ns);
         _CharT __thousands_sep = __npt.thousands_sep();
         unsigned __dc = 0;
         unsigned __dg = 0;
@@ -1239,7 +1252,7 @@ __num_put<_CharT>::__widen_and_group_float(char* __nb, char* __np, char* __ne,
             *__oe++ = __ct.widen(*__p);
             ++__dc;
         }
-        reverse(__ob + (__nf - __nb), __oe);
+        std::reverse(__ob + (__nf - __nb), __oe);
     }
     for (__nf = __ns; __nf < __ne; ++__nf)
     {
@@ -1260,8 +1273,10 @@ __num_put<_CharT>::__widen_and_group_float(char* __nb, char* __np, char* __ne,
         __op = __ob + (__np - __nb);
 }
 
-_LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(struct _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS __num_put<char>)
-_LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(struct _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS __num_put<wchar_t>)
+extern template struct _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS __num_put<char>;
+#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
+extern template struct _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS __num_put<wchar_t>;
+#endif
 
 template <class _CharT, class _OutputIterator = ostreambuf_iterator<_CharT> >
 class _LIBCPP_TEMPLATE_VIS num_put
@@ -1335,8 +1350,7 @@ public:
     static locale::id id;
 
 protected:
-    _LIBCPP_INLINE_VISIBILITY
-    ~num_put() {}
+    _LIBCPP_HIDE_FROM_ABI_VIRTUAL ~num_put() override {}
 
     virtual iter_type do_put(iter_type __s, ios_base& __iob, char_type __fl,
                              bool __v) const;
@@ -1354,6 +1368,18 @@ protected:
                              long double __v) const;
     virtual iter_type do_put(iter_type __s, ios_base& __iob, char_type __fl,
                              const void* __v) const;
+
+    template <class _Integral>
+    _LIBCPP_HIDE_FROM_ABI inline
+    _OutputIterator __do_put_integral(iter_type __s, ios_base& __iob,
+                                      char_type __fl, _Integral __v,
+                                      char const* __len) const;
+
+    template <class _Float>
+    _LIBCPP_HIDE_FROM_ABI inline
+    _OutputIterator __do_put_floating_point(iter_type __s, ios_base& __iob,
+                                            char_type __fl, _Float __v,
+                                            char const* __len) const;
 };
 
 template <class _CharT, class _OutputIterator>
@@ -1361,7 +1387,7 @@ locale::id
 num_put<_CharT, _OutputIterator>::id;
 
 template <class _CharT, class _OutputIterator>
-_LIBCPP_HIDDEN
+_LIBCPP_HIDE_FROM_ABI
 _OutputIterator
 __pad_and_output(_OutputIterator __s,
                  const _CharT* __ob, const _CharT* __op, const _CharT* __oe,
@@ -1384,7 +1410,7 @@ __pad_and_output(_OutputIterator __s,
 }
 
 template <class _CharT, class _Traits>
-_LIBCPP_HIDDEN
+_LIBCPP_HIDE_FROM_ABI
 ostreambuf_iterator<_CharT, _Traits>
 __pad_and_output(ostreambuf_iterator<_CharT, _Traits> __s,
                  const _CharT* __ob, const _CharT* __op, const _CharT* __oe,
@@ -1436,9 +1462,9 @@ num_put<_CharT, _OutputIterator>::do_put(iter_type __s, ios_base& __iob,
 {
     if ((__iob.flags() & ios_base::boolalpha) == 0)
         return do_put(__s, __iob, __fl, (unsigned long)__v);
-    const numpunct<char_type>& __np = use_facet<numpunct<char_type> >(__iob.getloc());
+    const numpunct<char_type>& __np = std::use_facet<numpunct<char_type> >(__iob.getloc());
     typedef typename numpunct<char_type>::string_type string_type;
-#if _LIBCPP_DEBUG_LEVEL == 2
+#ifdef _LIBCPP_ENABLE_DEBUG_MODE
     string_type __tmp(__v ? __np.truename() : __np.falsename());
     string_type __nm = _VSTD::move(__tmp);
 #else
@@ -1450,22 +1476,29 @@ num_put<_CharT, _OutputIterator>::do_put(iter_type __s, ios_base& __iob,
 }
 
 template <class _CharT, class _OutputIterator>
+template <class _Integral>
+_LIBCPP_HIDE_FROM_ABI inline
 _OutputIterator
-num_put<_CharT, _OutputIterator>::do_put(iter_type __s, ios_base& __iob,
-                                         char_type __fl, long __v) const
+num_put<_CharT, _OutputIterator>::__do_put_integral(iter_type __s, ios_base& __iob,
+                                                    char_type __fl, _Integral __v,
+                                                    char const* __len) const
 {
     // Stage 1 - Get number in narrow char
-    char __fmt[6] = {'%', 0};
-    const char* __len = "l";
-    this->__format_int(__fmt+1, __len, true, __iob.flags());
+    char __fmt[8] = {'%', 0};
+    this->__format_int(__fmt+1, __len, is_signed<_Integral>::value, __iob.flags());
     // Worst case is octal, with showbase enabled. Note that octal is always
     // printed as an unsigned value.
+    using _Unsigned = typename make_unsigned<_Integral>::type;
     _LIBCPP_CONSTEXPR const unsigned __nbuf
-        = (numeric_limits<unsigned long>::digits / 3)        // 1 char per 3 bits
-        + ((numeric_limits<unsigned long>::digits % 3) != 0) // round up
+        = (numeric_limits<_Unsigned>::digits / 3)        // 1 char per 3 bits
+        + ((numeric_limits<_Unsigned>::digits % 3) != 0) // round up
         + 2; // base prefix + terminating null character
     char __nar[__nbuf];
+    _LIBCPP_DIAGNOSTIC_PUSH
+    _LIBCPP_CLANG_DIAGNOSTIC_IGNORED("-Wformat-nonliteral")
+    _LIBCPP_GCC_DIAGNOSTIC_IGNORED("-Wformat-nonliteral")
     int __nc = __libcpp_snprintf_l(__nar, sizeof(__nar), _LIBCPP_GET_C_LOCALE, __fmt, __v);
+    _LIBCPP_DIAGNOSTIC_POP
     char* __ne = __nar + __nc;
     char* __np = this->__identify_padding(__nar, __ne, __iob);
     // Stage 2 - Widen __nar while adding thousands separators
@@ -1475,7 +1508,15 @@ num_put<_CharT, _OutputIterator>::do_put(iter_type __s, ios_base& __iob,
     this->__widen_and_group_int(__nar, __np, __ne, __o, __op, __oe, __iob.getloc());
     // [__o, __oe) contains thousands_sep'd wide number
     // Stage 3 & 4
-    return __pad_and_output(__s, __o, __op, __oe, __iob, __fl);
+    return std::__pad_and_output(__s, __o, __op, __oe, __iob, __fl);
+}
+
+template <class _CharT, class _OutputIterator>
+_OutputIterator
+num_put<_CharT, _OutputIterator>::do_put(iter_type __s, ios_base& __iob,
+                                         char_type __fl, long __v) const
+{
+    return this->__do_put_integral(__s, __iob, __fl, __v, "l");
 }
 
 template <class _CharT, class _OutputIterator>
@@ -1483,28 +1524,7 @@ _OutputIterator
 num_put<_CharT, _OutputIterator>::do_put(iter_type __s, ios_base& __iob,
                                          char_type __fl, long long __v) const
 {
-    // Stage 1 - Get number in narrow char
-    char __fmt[8] = {'%', 0};
-    const char* __len = "ll";
-    this->__format_int(__fmt+1, __len, true, __iob.flags());
-    // Worst case is octal, with showbase enabled. Note that octal is always
-    // printed as an unsigned value.
-    _LIBCPP_CONSTEXPR const unsigned __nbuf
-        = (numeric_limits<unsigned long long>::digits / 3)        // 1 char per 3 bits
-        + ((numeric_limits<unsigned long long>::digits % 3) != 0) // round up
-        + 2; // base prefix + terminating null character
-    char __nar[__nbuf];
-    int __nc = __libcpp_snprintf_l(__nar, sizeof(__nar), _LIBCPP_GET_C_LOCALE, __fmt, __v);
-    char* __ne = __nar + __nc;
-    char* __np = this->__identify_padding(__nar, __ne, __iob);
-    // Stage 2 - Widen __nar while adding thousands separators
-    char_type __o[2*(__nbuf-1) - 1];
-    char_type* __op;  // pad here
-    char_type* __oe;  // end of output
-    this->__widen_and_group_int(__nar, __np, __ne, __o, __op, __oe, __iob.getloc());
-    // [__o, __oe) contains thousands_sep'd wide number
-    // Stage 3 & 4
-    return __pad_and_output(__s, __o, __op, __oe, __iob, __fl);
+    return this->__do_put_integral(__s, __iob, __fl, __v, "ll");
 }
 
 template <class _CharT, class _OutputIterator>
@@ -1512,27 +1532,7 @@ _OutputIterator
 num_put<_CharT, _OutputIterator>::do_put(iter_type __s, ios_base& __iob,
                                          char_type __fl, unsigned long __v) const
 {
-    // Stage 1 - Get number in narrow char
-    char __fmt[6] = {'%', 0};
-    const char* __len = "l";
-    this->__format_int(__fmt+1, __len, false, __iob.flags());
-    // Worst case is octal, with showbase enabled.
-    _LIBCPP_CONSTEXPR const unsigned __nbuf
-        = (numeric_limits<unsigned long>::digits / 3)        // 1 char per 3 bits
-        + ((numeric_limits<unsigned long>::digits % 3) != 0) // round up
-        + 2; // base prefix + terminating null character
-    char __nar[__nbuf];
-    int __nc = __libcpp_snprintf_l(__nar, sizeof(__nar), _LIBCPP_GET_C_LOCALE, __fmt, __v);
-    char* __ne = __nar + __nc;
-    char* __np = this->__identify_padding(__nar, __ne, __iob);
-    // Stage 2 - Widen __nar while adding thousands separators
-    char_type __o[2*(__nbuf-1) - 1];
-    char_type* __op;  // pad here
-    char_type* __oe;  // end of output
-    this->__widen_and_group_int(__nar, __np, __ne, __o, __op, __oe, __iob.getloc());
-    // [__o, __oe) contains thousands_sep'd wide number
-    // Stage 3 & 4
-    return __pad_and_output(__s, __o, __op, __oe, __iob, __fl);
+    return this->__do_put_integral(__s, __iob, __fl, __v, "l");
 }
 
 template <class _CharT, class _OutputIterator>
@@ -1540,42 +1540,27 @@ _OutputIterator
 num_put<_CharT, _OutputIterator>::do_put(iter_type __s, ios_base& __iob,
                                          char_type __fl, unsigned long long __v) const
 {
-    // Stage 1 - Get number in narrow char
-    char __fmt[8] = {'%', 0};
-    const char* __len = "ll";
-    this->__format_int(__fmt+1, __len, false, __iob.flags());
-    // Worst case is octal, with showbase enabled.
-    _LIBCPP_CONSTEXPR const unsigned __nbuf
-        = (numeric_limits<unsigned long long>::digits / 3)        // 1 char per 3 bits
-        + ((numeric_limits<unsigned long long>::digits % 3) != 0) // round up
-        + 2; // base prefix + terminating null character
-    char __nar[__nbuf];
-    int __nc = __libcpp_snprintf_l(__nar, sizeof(__nar), _LIBCPP_GET_C_LOCALE, __fmt, __v);
-    char* __ne = __nar + __nc;
-    char* __np = this->__identify_padding(__nar, __ne, __iob);
-    // Stage 2 - Widen __nar while adding thousands separators
-    char_type __o[2*(__nbuf-1) - 1];
-    char_type* __op;  // pad here
-    char_type* __oe;  // end of output
-    this->__widen_and_group_int(__nar, __np, __ne, __o, __op, __oe, __iob.getloc());
-    // [__o, __oe) contains thousands_sep'd wide number
-    // Stage 3 & 4
-    return __pad_and_output(__s, __o, __op, __oe, __iob, __fl);
+    return this->__do_put_integral(__s, __iob, __fl, __v, "ll");
 }
 
 template <class _CharT, class _OutputIterator>
+template <class _Float>
+_LIBCPP_HIDE_FROM_ABI inline
 _OutputIterator
-num_put<_CharT, _OutputIterator>::do_put(iter_type __s, ios_base& __iob,
-                                         char_type __fl, double __v) const
+num_put<_CharT, _OutputIterator>::__do_put_floating_point(iter_type __s, ios_base& __iob,
+                                                          char_type __fl, _Float __v,
+                                                          char const* __len) const
 {
     // Stage 1 - Get number in narrow char
     char __fmt[8] = {'%', 0};
-    const char* __len = "";
     bool __specify_precision = this->__format_float(__fmt+1, __len, __iob.flags());
     const unsigned __nbuf = 30;
     char __nar[__nbuf];
     char* __nb = __nar;
     int __nc;
+    _LIBCPP_DIAGNOSTIC_PUSH
+    _LIBCPP_CLANG_DIAGNOSTIC_IGNORED("-Wformat-nonliteral")
+    _LIBCPP_GCC_DIAGNOSTIC_IGNORED("-Wformat-nonliteral")
     if (__specify_precision)
         __nc = __libcpp_snprintf_l(__nb, __nbuf, _LIBCPP_GET_C_LOCALE, __fmt,
                                    (int)__iob.precision(), __v);
@@ -1592,6 +1577,7 @@ num_put<_CharT, _OutputIterator>::do_put(iter_type __s, ios_base& __iob,
             __throw_bad_alloc();
         __nbh.reset(__nb);
     }
+    _LIBCPP_DIAGNOSTIC_POP
     char* __ne = __nb + __nc;
     char* __np = this->__identify_padding(__nb, __ne, __iob);
     // Stage 2 - Widen __nar while adding thousands separators
@@ -1610,59 +1596,24 @@ num_put<_CharT, _OutputIterator>::do_put(iter_type __s, ios_base& __iob,
     this->__widen_and_group_float(__nb, __np, __ne, __ob, __op, __oe, __iob.getloc());
     // [__o, __oe) contains thousands_sep'd wide number
     // Stage 3 & 4
-    __s = __pad_and_output(__s, __ob, __op, __oe, __iob, __fl);
+    __s = std::__pad_and_output(__s, __ob, __op, __oe, __iob, __fl);
     return __s;
 }
 
 template <class _CharT, class _OutputIterator>
 _OutputIterator
 num_put<_CharT, _OutputIterator>::do_put(iter_type __s, ios_base& __iob,
+                                         char_type __fl, double __v) const
+{
+    return this->__do_put_floating_point(__s, __iob, __fl, __v, "");
+}
+
+template <class _CharT, class _OutputIterator>
+_OutputIterator
+num_put<_CharT, _OutputIterator>::do_put(iter_type __s, ios_base& __iob,
                                          char_type __fl, long double __v) const
 {
-    // Stage 1 - Get number in narrow char
-    char __fmt[8] = {'%', 0};
-    const char* __len = "L";
-    bool __specify_precision = this->__format_float(__fmt+1, __len, __iob.flags());
-    const unsigned __nbuf = 30;
-    char __nar[__nbuf];
-    char* __nb = __nar;
-    int __nc;
-    if (__specify_precision)
-        __nc = __libcpp_snprintf_l(__nb, __nbuf, _LIBCPP_GET_C_LOCALE, __fmt,
-                                   (int)__iob.precision(), __v);
-    else
-        __nc = __libcpp_snprintf_l(__nb, __nbuf, _LIBCPP_GET_C_LOCALE, __fmt, __v);
-    unique_ptr<char, void(*)(void*)> __nbh(nullptr, free);
-    if (__nc > static_cast<int>(__nbuf-1))
-    {
-        if (__specify_precision)
-            __nc = __libcpp_asprintf_l(&__nb, _LIBCPP_GET_C_LOCALE, __fmt, (int)__iob.precision(), __v);
-        else
-            __nc = __libcpp_asprintf_l(&__nb, _LIBCPP_GET_C_LOCALE, __fmt, __v);
-        if (__nc == -1)
-            __throw_bad_alloc();
-        __nbh.reset(__nb);
-    }
-    char* __ne = __nb + __nc;
-    char* __np = this->__identify_padding(__nb, __ne, __iob);
-    // Stage 2 - Widen __nar while adding thousands separators
-    char_type __o[2*(__nbuf-1) - 1];
-    char_type* __ob = __o;
-    unique_ptr<char_type, void(*)(void*)> __obh(0, free);
-    if (__nb != __nar)
-    {
-        __ob = (char_type*)malloc(2*static_cast<size_t>(__nc)*sizeof(char_type));
-        if (__ob == 0)
-            __throw_bad_alloc();
-        __obh.reset(__ob);
-    }
-    char_type* __op;  // pad here
-    char_type* __oe;  // end of output
-    this->__widen_and_group_float(__nb, __np, __ne, __ob, __op, __oe, __iob.getloc());
-    // [__o, __oe) contains thousands_sep'd wide number
-    // Stage 3 & 4
-    __s = __pad_and_output(__s, __ob, __op, __oe, __iob, __fl);
-    return __s;
+    return this->__do_put_floating_point(__s, __iob, __fl, __v, "L");
 }
 
 template <class _CharT, class _OutputIterator>
@@ -1671,17 +1622,16 @@ num_put<_CharT, _OutputIterator>::do_put(iter_type __s, ios_base& __iob,
                                          char_type __fl, const void* __v) const
 {
     // Stage 1 - Get pointer in narrow char
-    char __fmt[6] = "%p";
     const unsigned __nbuf = 20;
     char __nar[__nbuf];
-    int __nc = __libcpp_snprintf_l(__nar, sizeof(__nar), _LIBCPP_GET_C_LOCALE, __fmt, __v);
+    int __nc = __libcpp_snprintf_l(__nar, sizeof(__nar), _LIBCPP_GET_C_LOCALE, "%p", __v);
     char* __ne = __nar + __nc;
     char* __np = this->__identify_padding(__nar, __ne, __iob);
     // Stage 2 - Widen __nar
     char_type __o[2*(__nbuf-1) - 1];
     char_type* __op;  // pad here
     char_type* __oe;  // end of output
-    const ctype<char_type>& __ct = use_facet<ctype<char_type> >(__iob.getloc());
+    const ctype<char_type>& __ct = std::use_facet<ctype<char_type> >(__iob.getloc());
     __ct.widen(__nar, __ne, __o);
     __oe = __o + (__ne - __nar);
     if (__np == __ne)
@@ -1690,14 +1640,16 @@ num_put<_CharT, _OutputIterator>::do_put(iter_type __s, ios_base& __iob,
         __op = __o + (__np - __nar);
     // [__o, __oe) contains wide number
     // Stage 3 & 4
-    return __pad_and_output(__s, __o, __op, __oe, __iob, __fl);
+    return std::__pad_and_output(__s, __o, __op, __oe, __iob, __fl);
 }
 
-_LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS num_put<char>)
-_LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS num_put<wchar_t>)
+extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS num_put<char>;
+#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
+extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS num_put<wchar_t>;
+#endif
 
 template <class _CharT, class _InputIterator>
-_LIBCPP_HIDDEN
+_LIBCPP_HIDE_FROM_ABI
 int
 __get_up_to_n_digits(_InputIterator& __b, _InputIterator __e,
                      ios_base::iostate& __err, const ctype<_CharT>& __ct, int __n)
@@ -1761,6 +1713,7 @@ template <> _LIBCPP_FUNC_VIS const string& __time_get_c_storage<char>::__r() con
 template <> _LIBCPP_FUNC_VIS const string& __time_get_c_storage<char>::__x() const;
 template <> _LIBCPP_FUNC_VIS const string& __time_get_c_storage<char>::__X() const;
 
+#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
 template <> _LIBCPP_FUNC_VIS const wstring* __time_get_c_storage<wchar_t>::__weeks() const;
 template <> _LIBCPP_FUNC_VIS const wstring* __time_get_c_storage<wchar_t>::__months() const;
 template <> _LIBCPP_FUNC_VIS const wstring* __time_get_c_storage<wchar_t>::__am_pm() const;
@@ -1768,6 +1721,7 @@ template <> _LIBCPP_FUNC_VIS const wstring& __time_get_c_storage<wchar_t>::__c()
 template <> _LIBCPP_FUNC_VIS const wstring& __time_get_c_storage<wchar_t>::__r() const;
 template <> _LIBCPP_FUNC_VIS const wstring& __time_get_c_storage<wchar_t>::__x() const;
 template <> _LIBCPP_FUNC_VIS const wstring& __time_get_c_storage<wchar_t>::__X() const;
+#endif
 
 template <class _CharT, class _InputIterator = istreambuf_iterator<_CharT> >
 class _LIBCPP_TEMPLATE_VIS time_get
@@ -1841,8 +1795,7 @@ public:
     static locale::id id;
 
 protected:
-    _LIBCPP_INLINE_VISIBILITY
-    ~time_get() {}
+    _LIBCPP_HIDE_FROM_ABI_VIRTUAL ~time_get() override {}
 
     virtual dateorder do_date_order() const;
     virtual iter_type do_get_time(iter_type __b, iter_type __e, ios_base& __iob,
@@ -1973,8 +1926,8 @@ time_get<_CharT, _InputIterator>::__get_month(int& __m,
                                               ios_base::iostate& __err,
                                               const ctype<char_type>& __ct) const
 {
-    int __t = __get_up_to_n_digits(__b, __e, __err, __ct, 2) - 1;
-    if (!(__err & ios_base::failbit) && __t <= 11)
+    int __t = std::__get_up_to_n_digits(__b, __e, __err, __ct, 2) - 1;
+    if (!(__err & ios_base::failbit) && 0 <= __t && __t <= 11)
         __m = __t;
     else
         __err |= ios_base::failbit;
@@ -1987,7 +1940,7 @@ time_get<_CharT, _InputIterator>::__get_year(int& __y,
                                              ios_base::iostate& __err,
                                              const ctype<char_type>& __ct) const
 {
-    int __t = __get_up_to_n_digits(__b, __e, __err, __ct, 4);
+    int __t = std::__get_up_to_n_digits(__b, __e, __err, __ct, 4);
     if (!(__err & ios_base::failbit))
     {
         if (__t < 69)
@@ -2005,7 +1958,7 @@ time_get<_CharT, _InputIterator>::__get_year4(int& __y,
                                               ios_base::iostate& __err,
                                               const ctype<char_type>& __ct) const
 {
-    int __t = __get_up_to_n_digits(__b, __e, __err, __ct, 4);
+    int __t = std::__get_up_to_n_digits(__b, __e, __err, __ct, 4);
     if (!(__err & ios_base::failbit))
         __y = __t - 1900;
 }
@@ -2017,7 +1970,7 @@ time_get<_CharT, _InputIterator>::__get_hour(int& __h,
                                              ios_base::iostate& __err,
                                              const ctype<char_type>& __ct) const
 {
-    int __t = __get_up_to_n_digits(__b, __e, __err, __ct, 2);
+    int __t = std::__get_up_to_n_digits(__b, __e, __err, __ct, 2);
     if (!(__err & ios_base::failbit) && __t <= 23)
         __h = __t;
     else
@@ -2031,7 +1984,7 @@ time_get<_CharT, _InputIterator>::__get_12_hour(int& __h,
                                                 ios_base::iostate& __err,
                                                 const ctype<char_type>& __ct) const
 {
-    int __t = __get_up_to_n_digits(__b, __e, __err, __ct, 2);
+    int __t = std::__get_up_to_n_digits(__b, __e, __err, __ct, 2);
     if (!(__err & ios_base::failbit) && 1 <= __t && __t <= 12)
         __h = __t;
     else
@@ -2045,7 +1998,7 @@ time_get<_CharT, _InputIterator>::__get_minute(int& __m,
                                                ios_base::iostate& __err,
                                                const ctype<char_type>& __ct) const
 {
-    int __t = __get_up_to_n_digits(__b, __e, __err, __ct, 2);
+    int __t = std::__get_up_to_n_digits(__b, __e, __err, __ct, 2);
     if (!(__err & ios_base::failbit) && __t <= 59)
         __m = __t;
     else
@@ -2059,7 +2012,7 @@ time_get<_CharT, _InputIterator>::__get_second(int& __s,
                                                ios_base::iostate& __err,
                                                const ctype<char_type>& __ct) const
 {
-    int __t = __get_up_to_n_digits(__b, __e, __err, __ct, 2);
+    int __t = std::__get_up_to_n_digits(__b, __e, __err, __ct, 2);
     if (!(__err & ios_base::failbit) && __t <= 60)
         __s = __t;
     else
@@ -2073,7 +2026,7 @@ time_get<_CharT, _InputIterator>::__get_weekday(int& __w,
                                                 ios_base::iostate& __err,
                                                 const ctype<char_type>& __ct) const
 {
-    int __t = __get_up_to_n_digits(__b, __e, __err, __ct, 1);
+    int __t = std::__get_up_to_n_digits(__b, __e, __err, __ct, 1);
     if (!(__err & ios_base::failbit) && __t <= 6)
         __w = __t;
     else
@@ -2087,7 +2040,7 @@ time_get<_CharT, _InputIterator>::__get_day_year_num(int& __d,
                                                      ios_base::iostate& __err,
                                                      const ctype<char_type>& __ct) const
 {
-    int __t = __get_up_to_n_digits(__b, __e, __err, __ct, 3);
+    int __t = std::__get_up_to_n_digits(__b, __e, __err, __ct, 3);
     if (!(__err & ios_base::failbit) && __t <= 365)
         __d = __t;
     else
@@ -2152,7 +2105,7 @@ time_get<_CharT, _InputIterator>::get(iter_type __b, iter_type __e,
                                       ios_base::iostate& __err, tm* __tm,
                                       const char_type* __fmtb, const char_type* __fmte) const
 {
-    const ctype<char_type>& __ct = use_facet<ctype<char_type> >(__iob.getloc());
+    const ctype<char_type>& __ct = std::use_facet<ctype<char_type> >(__iob.getloc());
     __err = ios_base::goodbit;
     while (__fmtb != __fmte && __err == ios_base::goodbit)
     {
@@ -2239,7 +2192,7 @@ time_get<_CharT, _InputIterator>::do_get_weekday(iter_type __b, iter_type __e,
                                                  ios_base::iostate& __err,
                                                  tm* __tm) const
 {
-    const ctype<char_type>& __ct = use_facet<ctype<char_type> >(__iob.getloc());
+    const ctype<char_type>& __ct = std::use_facet<ctype<char_type> >(__iob.getloc());
     __get_weekdayname(__tm->tm_wday, __b, __e, __err, __ct);
     return __b;
 }
@@ -2251,7 +2204,7 @@ time_get<_CharT, _InputIterator>::do_get_monthname(iter_type __b, iter_type __e,
                                                    ios_base::iostate& __err,
                                                    tm* __tm) const
 {
-    const ctype<char_type>& __ct = use_facet<ctype<char_type> >(__iob.getloc());
+    const ctype<char_type>& __ct = std::use_facet<ctype<char_type> >(__iob.getloc());
     __get_monthname(__tm->tm_mon, __b, __e, __err, __ct);
     return __b;
 }
@@ -2263,7 +2216,7 @@ time_get<_CharT, _InputIterator>::do_get_year(iter_type __b, iter_type __e,
                                               ios_base::iostate& __err,
                                               tm* __tm) const
 {
-    const ctype<char_type>& __ct = use_facet<ctype<char_type> >(__iob.getloc());
+    const ctype<char_type>& __ct = std::use_facet<ctype<char_type> >(__iob.getloc());
     __get_year(__tm->tm_year, __b, __e, __err, __ct);
     return __b;
 }
@@ -2276,7 +2229,7 @@ time_get<_CharT, _InputIterator>::do_get(iter_type __b, iter_type __e,
                                          char __fmt, char) const
 {
     __err = ios_base::goodbit;
-    const ctype<char_type>& __ct = use_facet<ctype<char_type> >(__iob.getloc());
+    const ctype<char_type>& __ct = std::use_facet<ctype<char_type> >(__iob.getloc());
     switch (__fmt)
     {
     case 'a':
@@ -2379,8 +2332,10 @@ time_get<_CharT, _InputIterator>::do_get(iter_type __b, iter_type __e,
     return __b;
 }
 
-_LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS time_get<char>)
-_LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS time_get<wchar_t>)
+extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS time_get<char>;
+#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
+extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS time_get<wchar_t>;
+#endif
 
 class _LIBCPP_TYPE_VIS __time_get
 {
@@ -2433,7 +2388,9 @@ extern template _LIBCPP_FUNC_VIS __time_get_storage<_CharT>::string_type __time_
 /**/
 
 _LIBCPP_TIME_GET_STORAGE_EXPLICIT_INSTANTIATION(char)
+#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
 _LIBCPP_TIME_GET_STORAGE_EXPLICIT_INSTANTIATION(wchar_t)
+#endif
 #undef _LIBCPP_TIME_GET_STORAGE_EXPLICIT_INSTANTIATION
 
 template <class _CharT, class _InputIterator = istreambuf_iterator<_CharT> >
@@ -2457,30 +2414,23 @@ public:
           __time_get_storage<_CharT>(__nm) {}
 
 protected:
-    _LIBCPP_INLINE_VISIBILITY
-    ~time_get_byname() {}
+    _LIBCPP_HIDE_FROM_ABI_VIRTUAL ~time_get_byname() override {}
 
-    _LIBCPP_INLINE_VISIBILITY
-    virtual dateorder do_date_order() const {return this->__do_date_order();}
+    _LIBCPP_HIDE_FROM_ABI_VIRTUAL dateorder do_date_order() const override {return this->__do_date_order();}
 private:
-    _LIBCPP_INLINE_VISIBILITY
-    virtual const string_type* __weeks() const  {return this->__weeks_;}
-    _LIBCPP_INLINE_VISIBILITY
-    virtual const string_type* __months() const {return this->__months_;}
-    _LIBCPP_INLINE_VISIBILITY
-    virtual const string_type* __am_pm() const  {return this->__am_pm_;}
-    _LIBCPP_INLINE_VISIBILITY
-    virtual const string_type& __c() const      {return this->__c_;}
-    _LIBCPP_INLINE_VISIBILITY
-    virtual const string_type& __r() const      {return this->__r_;}
-    _LIBCPP_INLINE_VISIBILITY
-    virtual const string_type& __x() const      {return this->__x_;}
-    _LIBCPP_INLINE_VISIBILITY
-    virtual const string_type& __X() const      {return this->__X_;}
+    _LIBCPP_HIDE_FROM_ABI_VIRTUAL const string_type* __weeks() const override  {return this->__weeks_;}
+    _LIBCPP_HIDE_FROM_ABI_VIRTUAL const string_type* __months() const override {return this->__months_;}
+    _LIBCPP_HIDE_FROM_ABI_VIRTUAL const string_type* __am_pm() const override  {return this->__am_pm_;}
+    _LIBCPP_HIDE_FROM_ABI_VIRTUAL const string_type& __c() const override      {return this->__c_;}
+    _LIBCPP_HIDE_FROM_ABI_VIRTUAL const string_type& __r() const override      {return this->__r_;}
+    _LIBCPP_HIDE_FROM_ABI_VIRTUAL const string_type& __x() const override      {return this->__x_;}
+    _LIBCPP_HIDE_FROM_ABI_VIRTUAL const string_type& __X() const override      {return this->__X_;}
 };
 
-_LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS time_get_byname<char>)
-_LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS time_get_byname<wchar_t>)
+extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS time_get_byname<char>;
+#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
+extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS time_get_byname<wchar_t>;
+#endif
 
 class _LIBCPP_TYPE_VIS __time_put
 {
@@ -2492,8 +2442,10 @@ protected:
     ~__time_put();
     void __do_put(char* __nb, char*& __ne, const tm* __tm,
                   char __fmt, char __mod) const;
+#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
     void __do_put(wchar_t* __wb, wchar_t*& __we, const tm* __tm,
                   char __fmt, char __mod) const;
+#endif
 };
 
 template <class _CharT, class _OutputIterator = ostreambuf_iterator<_CharT> >
@@ -2522,8 +2474,7 @@ public:
     static locale::id id;
 
 protected:
-    _LIBCPP_INLINE_VISIBILITY
-    ~time_put() {}
+    _LIBCPP_HIDE_FROM_ABI_VIRTUAL ~time_put() override {}
     virtual iter_type do_put(iter_type __s, ios_base&, char_type, const tm* __tm,
                              char __fmt, char __mod) const;
 
@@ -2548,7 +2499,7 @@ time_put<_CharT, _OutputIterator>::put(iter_type __s, ios_base& __iob,
                                        const char_type* __pb,
                                        const char_type* __pe) const
 {
-    const ctype<char_type>& __ct = use_facet<ctype<char_type> >(__iob.getloc());
+    const ctype<char_type>& __ct = std::use_facet<ctype<char_type> >(__iob.getloc());
     for (; __pb != __pe; ++__pb)
     {
         if (__ct.narrow(*__pb, 0) == '%')
@@ -2592,8 +2543,10 @@ time_put<_CharT, _OutputIterator>::do_put(iter_type __s, ios_base&,
     return _VSTD::copy(__nb, __ne, __s);
 }
 
-_LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS time_put<char>)
-_LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS time_put<wchar_t>)
+extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS time_put<char>;
+#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
+extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS time_put<wchar_t>;
+#endif
 
 template <class _CharT, class _OutputIterator = ostreambuf_iterator<_CharT> >
 class _LIBCPP_TEMPLATE_VIS time_put_byname
@@ -2609,12 +2562,13 @@ public:
         : time_put<_CharT, _OutputIterator>(__nm, __refs) {}
 
 protected:
-    _LIBCPP_INLINE_VISIBILITY
-    ~time_put_byname() {}
+    _LIBCPP_HIDE_FROM_ABI_VIRTUAL ~time_put_byname() override {}
 };
 
-_LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS time_put_byname<char>)
-_LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS time_put_byname<wchar_t>)
+extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS time_put_byname<char>;
+#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
+extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS time_put_byname<wchar_t>;
+#endif
 
 // money_base
 
@@ -2656,8 +2610,7 @@ public:
     static const bool intl = _International;
 
 protected:
-    _LIBCPP_INLINE_VISIBILITY
-    ~moneypunct() {}
+    _LIBCPP_HIDE_FROM_ABI_VIRTUAL ~moneypunct() override {}
 
     virtual char_type   do_decimal_point() const {return numeric_limits<char_type>::max();}
     virtual char_type   do_thousands_sep() const {return numeric_limits<char_type>::max();}
@@ -2680,10 +2633,12 @@ template <class _CharT, bool _International>
 const bool
 moneypunct<_CharT, _International>::intl;
 
-_LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS moneypunct<char, false>)
-_LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS moneypunct<char, true>)
-_LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS moneypunct<wchar_t, false>)
-_LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS moneypunct<wchar_t, true>)
+extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS moneypunct<char, false>;
+extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS moneypunct<char, true>;
+#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
+extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS moneypunct<wchar_t, false>;
+extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS moneypunct<wchar_t, true>;
+#endif
 
 // moneypunct_byname
 
@@ -2705,18 +2660,17 @@ public:
         : moneypunct<_CharT, _International>(__refs) {init(__nm.c_str());}
 
 protected:
-    _LIBCPP_INLINE_VISIBILITY
-    ~moneypunct_byname() {}
-
-    virtual char_type   do_decimal_point() const {return __decimal_point_;}
-    virtual char_type   do_thousands_sep() const {return __thousands_sep_;}
-    virtual string      do_grouping()      const {return __grouping_;}
-    virtual string_type do_curr_symbol()   const {return __curr_symbol_;}
-    virtual string_type do_positive_sign() const {return __positive_sign_;}
-    virtual string_type do_negative_sign() const {return __negative_sign_;}
-    virtual int         do_frac_digits()   const {return __frac_digits_;}
-    virtual pattern     do_pos_format()    const {return __pos_format_;}
-    virtual pattern     do_neg_format()    const {return __neg_format_;}
+    _LIBCPP_HIDE_FROM_ABI_VIRTUAL ~moneypunct_byname() override {}
+
+     char_type   do_decimal_point() const override {return __decimal_point_;}
+     char_type   do_thousands_sep() const override {return __thousands_sep_;}
+     string      do_grouping()      const override {return __grouping_;}
+     string_type do_curr_symbol()   const override {return __curr_symbol_;}
+     string_type do_positive_sign() const override {return __positive_sign_;}
+     string_type do_negative_sign() const override {return __negative_sign_;}
+     int         do_frac_digits()   const override {return __frac_digits_;}
+     pattern     do_pos_format()    const override {return __pos_format_;}
+     pattern     do_neg_format()    const override {return __neg_format_;}
 
 private:
     char_type   __decimal_point_;
@@ -2734,13 +2688,15 @@ private:
 
 template<> _LIBCPP_FUNC_VIS void moneypunct_byname<char, false>::init(const char*);
 template<> _LIBCPP_FUNC_VIS void moneypunct_byname<char, true>::init(const char*);
+extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS moneypunct_byname<char, false>;
+extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS moneypunct_byname<char, true>;
+
+#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
 template<> _LIBCPP_FUNC_VIS void moneypunct_byname<wchar_t, false>::init(const char*);
 template<> _LIBCPP_FUNC_VIS void moneypunct_byname<wchar_t, true>::init(const char*);
-
-_LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS moneypunct_byname<char, false>)
-_LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS moneypunct_byname<char, true>)
-_LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS moneypunct_byname<wchar_t, false>)
-_LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS moneypunct_byname<wchar_t, true>)
+extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS moneypunct_byname<wchar_t, false>;
+extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS moneypunct_byname<wchar_t, true>;
+#endif
 
 // money_get
 
@@ -2771,7 +2727,7 @@ __money_get<_CharT>::__gather_info(bool __intl, const locale& __loc,
     if (__intl)
     {
         const moneypunct<char_type, true>& __mp =
-            use_facet<moneypunct<char_type, true> >(__loc);
+            std::use_facet<moneypunct<char_type, true> >(__loc);
         __pat = __mp.neg_format();
         __nsn = __mp.negative_sign();
         __psn = __mp.positive_sign();
@@ -2784,7 +2740,7 @@ __money_get<_CharT>::__gather_info(bool __intl, const locale& __loc,
     else
     {
         const moneypunct<char_type, false>& __mp =
-            use_facet<moneypunct<char_type, false> >(__loc);
+            std::use_facet<moneypunct<char_type, false> >(__loc);
         __pat = __mp.neg_format();
         __nsn = __mp.negative_sign();
         __psn = __mp.positive_sign();
@@ -2796,8 +2752,10 @@ __money_get<_CharT>::__gather_info(bool __intl, const locale& __loc,
     }
 }
 
-_LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS __money_get<char>)
-_LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS __money_get<wchar_t>)
+extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS __money_get<char>;
+#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
+extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS __money_get<wchar_t>;
+#endif
 
 template <class _CharT, class _InputIterator = istreambuf_iterator<_CharT> >
 class _LIBCPP_TEMPLATE_VIS money_get
@@ -2830,9 +2788,7 @@ public:
     static locale::id id;
 
 protected:
-
-    _LIBCPP_INLINE_VISIBILITY
-    ~money_get() {}
+    _LIBCPP_HIDE_FROM_ABI_VIRTUAL ~money_get() override {}
 
     virtual iter_type do_get(iter_type __b, iter_type __e, bool __intl,
                              ios_base& __iob, ios_base::iostate& __err,
@@ -2857,7 +2813,7 @@ money_get<_CharT, _InputIterator>::id;
 _LIBCPP_FUNC_VIS void __do_nothing(void*);
 
 template <class _Tp>
-_LIBCPP_HIDDEN
+_LIBCPP_HIDE_FROM_ABI
 void
 __double_or_nothing(unique_ptr<_Tp, void(*)(void*)>& __b, _Tp*& __n, _Tp*& __e)
 {
@@ -2868,7 +2824,7 @@ __double_or_nothing(unique_ptr<_Tp, void(*)(void*)>& __b, _Tp*& __n, _Tp*& __e)
     if (__new_cap == 0)
         __new_cap = sizeof(_Tp);
     size_t __n_off = static_cast<size_t>(__n - __b.get());
-    _Tp* __t = (_Tp*)realloc(__owns ? __b.get() : 0, __new_cap);
+    _Tp* __t = (_Tp*)std::realloc(__owns ? __b.get() : 0, __new_cap);
     if (__t == 0)
         __throw_bad_alloc();
     if (__owns)
@@ -2891,6 +2847,10 @@ money_get<_CharT, _InputIterator>::__do_get(iter_type& __b, iter_type __e,
                                             unique_ptr<char_type, void(*)(void*)>& __wb,
                                             char_type*& __wn, char_type* __we)
 {
+    if (__b == __e) {
+        __err |= ios_base::failbit;
+        return false;
+    }
     const unsigned __bz = 100;
     unsigned __gbuf[__bz];
     unique_ptr<unsigned, void(*)(void*)> __gb(__gbuf, __do_nothing);
@@ -2935,51 +2895,31 @@ money_get<_CharT, _InputIterator>::__do_get(iter_type& __b, iter_type __e,
             }
             break;
         case money_base::sign:
-            if (__psn.size() + __nsn.size() > 0)
+            if (__psn.size() > 0 && *__b == __psn[0])
             {
-                if (__psn.size() == 0 || __nsn.size() == 0)
-                {   // sign is optional
-                    if (__psn.size() > 0)
-                    {   // __nsn.size() == 0
-                        if (*__b == __psn[0])
-                        {
-                            ++__b;
-                            if (__psn.size() > 1)
-                                __trailing_sign = &__psn;
-                        }
-                        else
-                            __neg = true;
-                    }
-                    else if (*__b == __nsn[0])  // __nsn.size() > 0 &&  __psn.size() == 0
-                    {
-                        ++__b;
-                        __neg = true;
-                        if (__nsn.size() > 1)
-                            __trailing_sign = &__nsn;
-                    }
-                }
-                else  // sign is required
-                {
-                    if (*__b == __psn[0])
-                    {
-                        ++__b;
-                        if (__psn.size() > 1)
-                            __trailing_sign = &__psn;
-                    }
-                    else if (*__b == __nsn[0])
-                    {
-                        ++__b;
-                        __neg = true;
-                        if (__nsn.size() > 1)
-                            __trailing_sign = &__nsn;
-                    }
-                    else
-                    {
-                        __err |= ios_base::failbit;
-                        return false;
-                    }
-                }
+                ++__b;
+                __neg = false;
+                if (__psn.size() > 1)
+                  __trailing_sign = &__psn;
+                break;
+            }
+            if (__nsn.size() > 0 && *__b == __nsn[0])
+            {
+                ++__b;
+                __neg = true;
+                if (__nsn.size() > 1)
+                    __trailing_sign = &__nsn;
+                break;
             }
+            if (__psn.size() > 0 && __nsn.size() > 0)
+            {   // sign is required
+                __err |= ios_base::failbit;
+                return false;
+            }
+            if (__psn.size() == 0 && __nsn.size() == 0)
+                // locale has no way of specifying a sign. Use the initial value of __neg as a default
+                break;
+            __neg = (__nsn.size() == 0);
             break;
         case money_base::symbol:
             {
@@ -2999,7 +2939,7 @@ money_get<_CharT, _InputIterator>::__do_get(iter_type& __b, iter_type __e,
                         ++__sym_space_end;
                     const size_t __num_spaces = __sym_space_end - __sym.begin();
                     if (__num_spaces > __spaces.size() ||
-                        !equal(__spaces.end() - __num_spaces, __spaces.end(),
+                        !std::equal(__spaces.end() - __num_spaces, __spaces.end(),
                                __sym.begin())) {
                         // No match. Put __sym_space_end back at the
                         // beginning of __sym, which will prevent a
@@ -3030,14 +2970,14 @@ money_get<_CharT, _InputIterator>::__do_get(iter_type& __b, iter_type __e,
                 if (__ct.is(ctype_base::digit, __c))
                 {
                     if (__wn == __we)
-                        __double_or_nothing(__wb, __wn, __we);
+                        std::__double_or_nothing(__wb, __wn, __we);
                     *__wn++ = __c;
                     ++__ng;
                 }
                 else if (__grp.size() > 0 && __ng > 0 && __c == __ts)
                 {
                     if (__gn == __ge)
-                        __double_or_nothing(__gb, __gn, __ge);
+                        std::__double_or_nothing(__gb, __gn, __ge);
                     *__gn++ = __ng;
                     __ng = 0;
                 }
@@ -3047,7 +2987,7 @@ money_get<_CharT, _InputIterator>::__do_get(iter_type& __b, iter_type __e,
             if (__gb.get() != __gn && __ng > 0)
             {
                 if (__gn == __ge)
-                    __double_or_nothing(__gb, __gn, __ge);
+                    std::__double_or_nothing(__gb, __gn, __ge);
                 *__gn++ = __ng;
             }
             if (__fd > 0)
@@ -3065,7 +3005,7 @@ money_get<_CharT, _InputIterator>::__do_get(iter_type& __b, iter_type __e,
                         return false;
                     }
                     if (__wn == __we)
-                        __double_or_nothing(__wb, __wn, __we);
+                        std::__double_or_nothing(__wb, __wn, __we);
                     *__wn++ = *__b;
                 }
             }
@@ -3115,7 +3055,7 @@ money_get<_CharT, _InputIterator>::do_get(iter_type __b, iter_type __e,
     char_type* __wn;
     char_type* __we = __wbuf + __bz;
     locale __loc = __iob.getloc();
-    const ctype<char_type>& __ct = use_facet<ctype<char_type> >(__loc);
+    const ctype<char_type>& __ct = std::use_facet<ctype<char_type> >(__loc);
     bool __neg = false;
     if (__do_get(__b, __e, __intl, __loc, __iob.flags(), __err, __neg, __ct,
                  __wb, __wn, __we))
@@ -3136,7 +3076,7 @@ money_get<_CharT, _InputIterator>::do_get(iter_type __b, iter_type __e,
         if (__neg)
             *__nc++ = '-';
         for (const char_type* __w = __wb.get(); __w < __wn; ++__w, ++__nc)
-            *__nc = __src[find(__atoms, _VSTD::end(__atoms), *__w) - __atoms];
+            *__nc = __src[std::find(__atoms, _VSTD::end(__atoms), *__w) - __atoms];
         *__nc = char();
         if (sscanf(__nbuf, "%Lf", &__v) != 1)
             __throw_runtime_error("money_get error");
@@ -3159,7 +3099,7 @@ money_get<_CharT, _InputIterator>::do_get(iter_type __b, iter_type __e,
     char_type* __wn;
     char_type* __we = __wbuf + __bz;
     locale __loc = __iob.getloc();
-    const ctype<char_type>& __ct = use_facet<ctype<char_type> >(__loc);
+    const ctype<char_type>& __ct = std::use_facet<ctype<char_type> >(__loc);
     bool __neg = false;
     if (__do_get(__b, __e, __intl, __loc, __iob.flags(), __err, __neg, __ct,
                  __wb, __wn, __we))
@@ -3179,8 +3119,10 @@ money_get<_CharT, _InputIterator>::do_get(iter_type __b, iter_type __e,
     return __b;
 }
 
-_LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS money_get<char>)
-_LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS money_get<wchar_t>)
+extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS money_get<char>;
+#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
+extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS money_get<wchar_t>;
+#endif
 
 // money_put
 
@@ -3219,7 +3161,7 @@ __money_put<_CharT>::__gather_info(bool __intl, bool __neg, const locale& __loc,
     if (__intl)
     {
         const moneypunct<char_type, true>& __mp =
-            use_facet<moneypunct<char_type, true> >(__loc);
+            std::use_facet<moneypunct<char_type, true> >(__loc);
         if (__neg)
         {
             __pat = __mp.neg_format();
@@ -3239,7 +3181,7 @@ __money_put<_CharT>::__gather_info(bool __intl, bool __neg, const locale& __loc,
     else
     {
         const moneypunct<char_type, false>& __mp =
-            use_facet<moneypunct<char_type, false> >(__loc);
+            std::use_facet<moneypunct<char_type, false> >(__loc);
         if (__neg)
         {
             __pat = __mp.neg_format();
@@ -3270,9 +3212,9 @@ __money_put<_CharT>::__format(char_type* __mb, char_type*& __mi, char_type*& __m
                               int __fd)
 {
     __me = __mb;
-    for (unsigned __p = 0; __p < 4; ++__p)
+    for (char __p : __pat.field)
     {
-        switch (__pat.field[__p])
+        switch (__p)
         {
         case money_base::none:
             __mi = __me;
@@ -3339,7 +3281,7 @@ __money_put<_CharT>::__format(char_type* __mb, char_type*& __mi, char_type*& __m
                 }
             }
             // reverse it
-            reverse(__t, __me);
+            std::reverse(__t, __me);
             }
             break;
         }
@@ -3354,8 +3296,10 @@ __money_put<_CharT>::__format(char_type* __mb, char_type*& __mi, char_type*& __m
         __mi = __mb;
 }
 
-_LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS __money_put<char>)
-_LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS __money_put<wchar_t>)
+extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS __money_put<char>;
+#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
+extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS __money_put<wchar_t>;
+#endif
 
 template <class _CharT, class _OutputIterator = ostreambuf_iterator<_CharT> >
 class _LIBCPP_TEMPLATE_VIS money_put
@@ -3388,8 +3332,7 @@ public:
     static locale::id id;
 
 protected:
-    _LIBCPP_INLINE_VISIBILITY
-    ~money_put() {}
+    _LIBCPP_HIDE_FROM_ABI_VIRTUAL ~money_put() override {}
 
     virtual iter_type do_put(iter_type __s, bool __intl, ios_base& __iob,
                              char_type __fl, long double __units) const;
@@ -3430,7 +3373,7 @@ money_put<_CharT, _OutputIterator>::do_put(iter_type __s, bool __intl,
     }
     // gather info
     locale __loc = __iob.getloc();
-    const ctype<char_type>& __ct = use_facet<ctype<char_type> >(__loc);
+    const ctype<char_type>& __ct = std::use_facet<ctype<char_type> >(__loc);
     __ct.widen(__bb, __bb + __n, __db);
     bool __neg = __n > 0 && __bb[0] == '-';
     money_base::pattern __pat;
@@ -3462,7 +3405,7 @@ money_put<_CharT, _OutputIterator>::do_put(iter_type __s, bool __intl,
     this->__format(__mb, __mi, __me, __iob.flags(),
                    __db, __db + __n, __ct,
                    __neg, __pat, __dp, __ts, __grp, __sym, __sn, __fd);
-    return __pad_and_output(__s, __mb, __mi, __me, __iob, __fl);
+    return std::__pad_and_output(__s, __mb, __mi, __me, __iob, __fl);
 }
 
 template <class _CharT, class _OutputIterator>
@@ -3473,7 +3416,7 @@ money_put<_CharT, _OutputIterator>::do_put(iter_type __s, bool __intl,
 {
     // gather info
     locale __loc = __iob.getloc();
-    const ctype<char_type>& __ct = use_facet<ctype<char_type> >(__loc);
+    const ctype<char_type>& __ct = std::use_facet<ctype<char_type> >(__loc);
     bool __neg = __digits.size() > 0 && __digits[0] == __ct.widen('-');
     money_base::pattern __pat;
     char_type __dp;
@@ -3504,11 +3447,13 @@ money_put<_CharT, _OutputIterator>::do_put(iter_type __s, bool __intl,
     this->__format(__mb, __mi, __me, __iob.flags(),
                    __digits.data(), __digits.data() + __digits.size(), __ct,
                    __neg, __pat, __dp, __ts, __grp, __sym, __sn, __fd);
-    return __pad_and_output(__s, __mb, __mi, __me, __iob, __fl);
+    return std::__pad_and_output(__s, __mb, __mi, __me, __iob, __fl);
 }
 
-_LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS money_put<char>)
-_LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS money_put<wchar_t>)
+extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS money_put<char>;
+#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
+extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS money_put<wchar_t>;
+#endif
 
 // messages
 
@@ -3555,8 +3500,7 @@ public:
     static locale::id id;
 
 protected:
-    _LIBCPP_INLINE_VISIBILITY
-    ~messages() {}
+    _LIBCPP_HIDE_FROM_ABI_VIRTUAL ~messages() override {}
 
     virtual catalog do_open(const basic_string<char>&, const locale&) const;
     virtual string_type do_get(catalog, int __set, int __msgid,
@@ -3590,7 +3534,7 @@ messages<_CharT>::do_get(catalog __c, int __set, int __msgid,
 {
 #ifdef _LIBCPP_HAS_CATOPEN
     string __ndflt;
-    __narrow_to_utf8<sizeof(char_type)*__CHAR_BIT__>()(back_inserter(__ndflt),
+    __narrow_to_utf8<sizeof(char_type)*__CHAR_BIT__>()(std::back_inserter(__ndflt),
                                                        __dflt.c_str(),
                                                        __dflt.c_str() + __dflt.size());
     if (__c != -1)
@@ -3598,7 +3542,7 @@ messages<_CharT>::do_get(catalog __c, int __set, int __msgid,
     nl_catd __cat = (nl_catd)__c;
     char* __n = catgets(__cat, __set, __msgid, __ndflt.c_str());
     string_type __w;
-    __widen_from_utf8<sizeof(char_type)*__CHAR_BIT__>()(back_inserter(__w),
+    __widen_from_utf8<sizeof(char_type)*__CHAR_BIT__>()(std::back_inserter(__w),
                                                         __n, __n + _VSTD::strlen(__n));
     return __w;
 #else // !_LIBCPP_HAS_CATOPEN
@@ -3623,8 +3567,10 @@ messages<_CharT>::do_close(catalog __c) const
 #endif // _LIBCPP_HAS_CATOPEN
 }
 
-_LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS messages<char>)
-_LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS messages<wchar_t>)
+extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS messages<char>;
+#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
+extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS messages<wchar_t>;
+#endif
 
 template <class _CharT>
 class _LIBCPP_TEMPLATE_VIS messages_byname
@@ -3643,17 +3589,18 @@ public:
         : messages<_CharT>(__refs) {}
 
 protected:
-    _LIBCPP_INLINE_VISIBILITY
-    ~messages_byname() {}
+    _LIBCPP_HIDE_FROM_ABI_VIRTUAL ~messages_byname() override {}
 };
 
-_LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS messages_byname<char>)
-_LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS messages_byname<wchar_t>)
+extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS messages_byname<char>;
+#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
+extern template class _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS messages_byname<wchar_t>;
+#endif
 
 template<class _Codecvt, class _Elem = wchar_t,
          class _Wide_alloc = allocator<_Elem>,
          class _Byte_alloc = allocator<char> >
-class _LIBCPP_TEMPLATE_VIS wstring_convert
+class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX17 wstring_convert
 {
 public:
     typedef basic_string<char, char_traits<char>, _Byte_alloc>   byte_string;
@@ -3720,6 +3667,7 @@ public:
     state_type state() const {return __cvtstate_;}
 };
 
+_LIBCPP_SUPPRESS_DEPRECATED_PUSH
 template<class _Codecvt, class _Elem, class _Wide_alloc, class _Byte_alloc>
 inline
 wstring_convert<_Codecvt, _Elem, _Wide_alloc, _Byte_alloc>::
@@ -3727,6 +3675,7 @@ wstring_convert<_Codecvt, _Elem, _Wide_alloc, _Byte_alloc>::
         : __cvtptr_(__pcvt), __cvtstate_(), __cvtcount_(0)
 {
 }
+_LIBCPP_SUPPRESS_DEPRECATED_POP
 
 template<class _Codecvt, class _Elem, class _Wide_alloc, class _Byte_alloc>
 inline
@@ -3761,6 +3710,7 @@ wstring_convert<_Codecvt, _Elem, _Wide_alloc, _Byte_alloc>::
 
 #endif // _LIBCPP_CXX03_LANG
 
+_LIBCPP_SUPPRESS_DEPRECATED_PUSH
 template<class _Codecvt, class _Elem, class _Wide_alloc, class _Byte_alloc>
 wstring_convert<_Codecvt, _Elem, _Wide_alloc, _Byte_alloc>::~wstring_convert()
 {
@@ -3772,6 +3722,7 @@ typename wstring_convert<_Codecvt, _Elem, _Wide_alloc, _Byte_alloc>::wide_string
 wstring_convert<_Codecvt, _Elem, _Wide_alloc, _Byte_alloc>::
     from_bytes(const char* __frm, const char* __frm_end)
 {
+_LIBCPP_SUPPRESS_DEPRECATED_POP
     __cvtcount_ = 0;
     if (__cvtptr_ != nullptr)
     {
@@ -3918,7 +3869,7 @@ wstring_convert<_Codecvt, _Elem, _Wide_alloc, _Byte_alloc>::
 }
 
 template <class _Codecvt, class _Elem = wchar_t, class _Tr = char_traits<_Elem> >
-class _LIBCPP_TEMPLATE_VIS wbuffer_convert
+class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX17 wbuffer_convert
     : public basic_streambuf<_Elem, _Tr>
 {
 public:
@@ -3995,6 +3946,7 @@ private:
     wbuffer_convert* __close();
 };
 
+_LIBCPP_SUPPRESS_DEPRECATED_PUSH
 template <class _Codecvt, class _Elem, class _Tr>
 wbuffer_convert<_Codecvt, _Elem, _Tr>::
     wbuffer_convert(streambuf* __bytebuf, _Codecvt* __pcvt, state_type __state)
@@ -4030,13 +3982,14 @@ template <class _Codecvt, class _Elem, class _Tr>
 typename wbuffer_convert<_Codecvt, _Elem, _Tr>::int_type
 wbuffer_convert<_Codecvt, _Elem, _Tr>::underflow()
 {
+_LIBCPP_SUPPRESS_DEPRECATED_POP
     if (__cv_ == 0 || __bufptr_ == 0)
         return traits_type::eof();
     bool __initial = __read_mode();
     char_type __1buf;
     if (this->gptr() == 0)
         this->setg(&__1buf, &__1buf+1, &__1buf+1);
-    const size_t __unget_sz = __initial ? 0 : min<size_t>((this->egptr() - this->eback()) / 2, 4);
+    const size_t __unget_sz = __initial ? 0 : std::min<size_t>((this->egptr() - this->eback()) / 2, 4);
     int_type __c = traits_type::eof();
     if (this->gptr() == this->egptr())
     {
@@ -4055,9 +4008,11 @@ wbuffer_convert<_Codecvt, _Elem, _Tr>::underflow()
         }
         else
         {
-             _LIBCPP_ASSERT(!(__extbufnext_ == NULL && (__extbufend_ != __extbufnext_)), "underflow moving from NULL" );
-             if (__extbufend_ != __extbufnext_)
+             if (__extbufend_ != __extbufnext_) {
+                _LIBCPP_ASSERT(__extbufnext_ != nullptr, "underflow moving from nullptr");
+                _LIBCPP_ASSERT(__extbuf_ != nullptr, "underflow moving into nullptr");
                 _VSTD::memmove(__extbuf_, __extbufnext_, __extbufend_ - __extbufnext_);
+             }
             __extbufnext_ = __extbuf_ + (__extbufend_ - __extbufnext_);
             __extbufend_ = __extbuf_ + (__extbuf_ == __extbuf_min_ ? sizeof(__extbuf_min_) : __ebs_);
             streamsize __nmemb = _VSTD::min(static_cast<streamsize>(this->egptr() - this->eback() - __unget_sz),
@@ -4094,10 +4049,12 @@ wbuffer_convert<_Codecvt, _Elem, _Tr>::underflow()
     return __c;
 }
 
+_LIBCPP_SUPPRESS_DEPRECATED_PUSH
 template <class _Codecvt, class _Elem, class _Tr>
 typename wbuffer_convert<_Codecvt, _Elem, _Tr>::int_type
 wbuffer_convert<_Codecvt, _Elem, _Tr>::pbackfail(int_type __c)
 {
+_LIBCPP_SUPPRESS_DEPRECATED_POP
     if (__cv_ != 0 && __bufptr_ != 0 && this->eback() < this->gptr())
     {
         if (traits_type::eq_int_type(__c, traits_type::eof()))
@@ -4115,10 +4072,12 @@ wbuffer_convert<_Codecvt, _Elem, _Tr>::pbackfail(int_type __c)
     return traits_type::eof();
 }
 
+_LIBCPP_SUPPRESS_DEPRECATED_PUSH
 template <class _Codecvt, class _Elem, class _Tr>
 typename wbuffer_convert<_Codecvt, _Elem, _Tr>::int_type
 wbuffer_convert<_Codecvt, _Elem, _Tr>::overflow(int_type __c)
 {
+_LIBCPP_SUPPRESS_DEPRECATED_POP
     if (__cv_ == 0 || __bufptr_ == 0)
         return traits_type::eof();
     __write_mode();
@@ -4177,10 +4136,12 @@ wbuffer_convert<_Codecvt, _Elem, _Tr>::overflow(int_type __c)
     return traits_type::not_eof(__c);
 }
 
+_LIBCPP_SUPPRESS_DEPRECATED_PUSH
 template <class _Codecvt, class _Elem, class _Tr>
 basic_streambuf<_Elem, _Tr>*
 wbuffer_convert<_Codecvt, _Elem, _Tr>::setbuf(char_type* __s, streamsize __n)
 {
+_LIBCPP_SUPPRESS_DEPRECATED_POP
     this->setg(0, 0, 0);
     this->setp(0, 0);
     if (__owns_eb_)
@@ -4230,6 +4191,7 @@ wbuffer_convert<_Codecvt, _Elem, _Tr>::setbuf(char_type* __s, streamsize __n)
     return this;
 }
 
+_LIBCPP_SUPPRESS_DEPRECATED_PUSH
 template <class _Codecvt, class _Elem, class _Tr>
 typename wbuffer_convert<_Codecvt, _Elem, _Tr>::pos_type
 wbuffer_convert<_Codecvt, _Elem, _Tr>::seekoff(off_type __off, ios_base::seekdir __way,
@@ -4261,6 +4223,7 @@ template <class _Codecvt, class _Elem, class _Tr>
 int
 wbuffer_convert<_Codecvt, _Elem, _Tr>::sync()
 {
+_LIBCPP_SUPPRESS_DEPRECATED_POP
     if (__cv_ == 0 || __bufptr_ == 0)
         return 0;
     if (__cm_ & ios_base::out)
@@ -4297,7 +4260,7 @@ wbuffer_convert<_Codecvt, _Elem, _Tr>::sync()
             {
                 if (this->gptr() != this->egptr())
                 {
-                    reverse(this->gptr(), this->egptr());
+                    std::reverse(this->gptr(), this->egptr());
                     codecvt_base::result __r;
                     const char_type* __e = this->gptr();
                     char* __extbe;
@@ -4329,6 +4292,7 @@ wbuffer_convert<_Codecvt, _Elem, _Tr>::sync()
     return 0;
 }
 
+_LIBCPP_SUPPRESS_DEPRECATED_PUSH
 template <class _Codecvt, class _Elem, class _Tr>
 bool
 wbuffer_convert<_Codecvt, _Elem, _Tr>::__read_mode()
@@ -4383,8 +4347,22 @@ wbuffer_convert<_Codecvt, _Elem, _Tr>::__close()
     return __rt;
 }
 
+_LIBCPP_SUPPRESS_DEPRECATED_POP
+
 _LIBCPP_END_NAMESPACE_STD
 
 _LIBCPP_POP_MACROS
 
+// NOLINTEND(libcpp-robust-against-adl)
+
+#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
+#  include <atomic>
+#  include <concepts>
+#  include <cstdarg>
+#  include <iterator>
+#  include <stdexcept>
+#  include <type_traits>
+#  include <typeinfo>
+#endif
+
 #endif // _LIBCPP_LOCALE
diff --git a/gnu/llvm/libcxx/include/math.h b/gnu/llvm/libcxx/include/math.h
index 77762d55451..a23d1ff3ed3 100644
--- a/gnu/llvm/libcxx/include/math.h
+++ b/gnu/llvm/libcxx/include/math.h
@@ -1,5 +1,5 @@
 // -*- C++ -*-
-//===---------------------------- math.h ----------------------------------===//
+//===----------------------------------------------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
@@ -294,10 +294,12 @@ long double    truncl(long double x);
 #include <__config>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
+#  pragma GCC system_header
 #endif
 
-#include_next <math.h>
+#  if __has_include_next(<math.h>)
+#    include_next <math.h>
+#  endif
 
 #ifdef __cplusplus
 
@@ -305,478 +307,237 @@ long double    truncl(long double x);
 // back to C++ linkage before including these C++ headers.
 extern "C++" {
 
-#include <stdlib.h>
-#include <type_traits>
+#include <__type_traits/enable_if.h>
+#include <__type_traits/is_floating_point.h>
+#include <__type_traits/is_integral.h>
+#include <__type_traits/is_same.h>
+#include <__type_traits/promote.h>
 #include <limits>
+#include <stdlib.h>
 
-// signbit
 
-#ifdef signbit
+#    ifdef fpclassify
+#      undef fpclassify
+#    endif
 
-template <class _A1>
-_LIBCPP_INLINE_VISIBILITY
-bool
-__libcpp_signbit(_A1 __lcpp_x) _NOEXCEPT
-{
-#if __has_builtin(__builtin_signbit)
-    return __builtin_signbit(__lcpp_x);
-#else
-    return signbit(__lcpp_x);
-#endif
-}
+#    ifdef signbit
+#      undef signbit
+#    endif
 
-#undef signbit
+#    ifdef isfinite
+#      undef isfinite
+#    endif
 
-template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
-typename std::enable_if<std::is_floating_point<_A1>::value, bool>::type
-signbit(_A1 __lcpp_x) _NOEXCEPT
-{
-    return __libcpp_signbit((typename std::__promote<_A1>::type)__lcpp_x);
-}
+#    ifdef isinf
+#      undef isinf
+#    endif
 
-template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
-typename std::enable_if<
-    std::is_integral<_A1>::value && std::is_signed<_A1>::value, bool>::type
-signbit(_A1 __lcpp_x) _NOEXCEPT
-{ return __lcpp_x < 0; }
+#    ifdef isnan
+#      undef isnan
+#    endif
 
-template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
-typename std::enable_if<
-    std::is_integral<_A1>::value && !std::is_signed<_A1>::value, bool>::type
-signbit(_A1) _NOEXCEPT
-{ return false; }
-
-#elif defined(_LIBCPP_MSVCRT)
-
-template <typename _A1>
-inline _LIBCPP_INLINE_VISIBILITY
-typename std::enable_if<std::is_floating_point<_A1>::value, bool>::type
-signbit(_A1 __lcpp_x) _NOEXCEPT
-{
-  return ::signbit(static_cast<typename std::__promote<_A1>::type>(__lcpp_x));
-}
+#    ifdef isnormal
+#      undef isnormal
+#    endif
 
-template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
-typename std::enable_if<
-    std::is_integral<_A1>::value && std::is_signed<_A1>::value, bool>::type
-signbit(_A1 __lcpp_x) _NOEXCEPT
-{ return __lcpp_x < 0; }
+#    ifdef isgreater
+#      undef isgreater
+#    endif
 
-template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
-typename std::enable_if<
-    std::is_integral<_A1>::value && !std::is_signed<_A1>::value, bool>::type
-signbit(_A1) _NOEXCEPT
-{ return false; }
+#    ifdef isgreaterequal
+#      undef isgreaterequal
+#    endif
 
-#endif // signbit
+#    ifdef isless
+#      undef isless
+#    endif
 
-// fpclassify
+#    ifdef islessequal
+#      undef islessequal
+#    endif
 
-#ifdef fpclassify
+#    ifdef islessgreater
+#      undef islessgreater
+#    endif
 
-template <class _A1>
-_LIBCPP_INLINE_VISIBILITY
-int
-__libcpp_fpclassify(_A1 __lcpp_x) _NOEXCEPT
-{
-#if __has_builtin(__builtin_fpclassify)
-  return __builtin_fpclassify(FP_NAN, FP_INFINITE, FP_NORMAL, FP_SUBNORMAL,
-                                FP_ZERO, __lcpp_x);
-#else
-    return fpclassify(__lcpp_x);
-#endif
-}
+#    ifdef isunordered
+#      undef isunordered
+#    endif
 
-#undef fpclassify
+// signbit
 
-template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
-typename std::enable_if<std::is_floating_point<_A1>::value, int>::type
-fpclassify(_A1 __lcpp_x) _NOEXCEPT
-{
-    return __libcpp_fpclassify((typename std::__promote<_A1>::type)__lcpp_x);
+template <class _A1, std::__enable_if_t<std::is_floating_point<_A1>::value, int> = 0>
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI bool signbit(_A1 __x) _NOEXCEPT {
+  return __builtin_signbit(__x);
 }
 
-template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
-typename std::enable_if<std::is_integral<_A1>::value, int>::type
-fpclassify(_A1 __lcpp_x) _NOEXCEPT
-{ return __lcpp_x == 0 ? FP_ZERO : FP_NORMAL; }
+template <class _A1, std::__enable_if_t<std::is_integral<_A1>::value && std::is_signed<_A1>::value, int> = 0>
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI bool signbit(_A1 __x) _NOEXCEPT {
+  return __x < 0;
+}
 
-#elif defined(_LIBCPP_MSVCRT)
+template <class _A1, std::__enable_if_t<std::is_integral<_A1>::value && !std::is_signed<_A1>::value, int> = 0>
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI bool signbit(_A1) _NOEXCEPT {
+  return false;
+}
 
-template <typename _A1>
-inline _LIBCPP_INLINE_VISIBILITY
-typename std::enable_if<std::is_floating_point<_A1>::value, bool>::type
-fpclassify(_A1 __lcpp_x) _NOEXCEPT
-{
-  return ::fpclassify(static_cast<typename std::__promote<_A1>::type>(__lcpp_x));
+// fpclassify
+
+template <class _A1, std::__enable_if_t<std::is_floating_point<_A1>::value, int> = 0>
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI int fpclassify(_A1 __x) _NOEXCEPT {
+  return __builtin_fpclassify(FP_NAN, FP_INFINITE, FP_NORMAL, FP_SUBNORMAL, FP_ZERO, __x);
 }
 
-template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
-typename std::enable_if<std::is_integral<_A1>::value, int>::type
-fpclassify(_A1 __lcpp_x) _NOEXCEPT
-{ return __lcpp_x == 0 ? FP_ZERO : FP_NORMAL; }
+template <class _A1, std::__enable_if_t<std::is_integral<_A1>::value, int> = 0>
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI int fpclassify(_A1 __x) _NOEXCEPT {
+  return __x == 0 ? FP_ZERO : FP_NORMAL;
+}
 
-#endif // fpclassify
+// The MSVC runtime already provides these functions as templates
+#ifndef _LIBCPP_MSVCRT
 
 // isfinite
 
-#ifdef isfinite
-
-template <class _A1>
-_LIBCPP_INLINE_VISIBILITY
-bool
-__libcpp_isfinite(_A1 __lcpp_x) _NOEXCEPT
-{
-#if __has_builtin(__builtin_isfinite)
-    return __builtin_isfinite(__lcpp_x);
-#else
-    return isfinite(__lcpp_x);
-#endif
+template <class _A1,
+          std::__enable_if_t<std::is_arithmetic<_A1>::value && std::numeric_limits<_A1>::has_infinity, int> = 0>
+_LIBCPP_NODISCARD_EXT _LIBCPP_CONSTEXPR_SINCE_CXX23 _LIBCPP_HIDE_FROM_ABI bool isfinite(_A1 __x) _NOEXCEPT {
+  return __builtin_isfinite((typename std::__promote<_A1>::type)__x);
 }
 
-#undef isfinite
-
-template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
-typename std::enable_if<
-    std::is_arithmetic<_A1>::value && std::numeric_limits<_A1>::has_infinity,
-    bool>::type
-isfinite(_A1 __lcpp_x) _NOEXCEPT
-{
-    return __libcpp_isfinite((typename std::__promote<_A1>::type)__lcpp_x);
+template <class _A1,
+          std::__enable_if_t<std::is_arithmetic<_A1>::value && !std::numeric_limits<_A1>::has_infinity, int> = 0>
+_LIBCPP_NODISCARD_EXT _LIBCPP_CONSTEXPR_SINCE_CXX23 _LIBCPP_HIDE_FROM_ABI bool isfinite(_A1) _NOEXCEPT {
+  return true;
 }
 
-template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
-typename std::enable_if<
-    std::is_arithmetic<_A1>::value && !std::numeric_limits<_A1>::has_infinity,
-    bool>::type
-isfinite(_A1) _NOEXCEPT
-{ return true; }
-
-#endif // isfinite
-
 // isinf
 
-#ifdef isinf
+template <class _A1,
+          std::__enable_if_t<std::is_arithmetic<_A1>::value && std::numeric_limits<_A1>::has_infinity, int> = 0>
+_LIBCPP_NODISCARD_EXT _LIBCPP_CONSTEXPR_SINCE_CXX23 _LIBCPP_HIDE_FROM_ABI bool isinf(_A1 __x) _NOEXCEPT {
+  return __builtin_isinf((typename std::__promote<_A1>::type)__x);
+}
 
 template <class _A1>
-_LIBCPP_INLINE_VISIBILITY
-bool
-__libcpp_isinf(_A1 __lcpp_x) _NOEXCEPT
-{
-#if __has_builtin(__builtin_isinf)
-    return __builtin_isinf(__lcpp_x);
-#else
-    return isinf(__lcpp_x);
-#endif
+_LIBCPP_NODISCARD_EXT _LIBCPP_CONSTEXPR_SINCE_CXX23 _LIBCPP_HIDE_FROM_ABI
+    typename std::enable_if< std::is_arithmetic<_A1>::value && !std::numeric_limits<_A1>::has_infinity, bool>::type
+    isinf(_A1) _NOEXCEPT {
+  return false;
 }
 
-#undef isinf
-
-template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
-typename std::enable_if<
-    std::is_arithmetic<_A1>::value && std::numeric_limits<_A1>::has_infinity,
-    bool>::type
-isinf(_A1 __lcpp_x) _NOEXCEPT
-{
-    return __libcpp_isinf((typename std::__promote<_A1>::type)__lcpp_x);
+#      ifdef _LIBCPP_PREFERRED_OVERLOAD
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_CONSTEXPR_SINCE_CXX23 _LIBCPP_HIDE_FROM_ABI bool isinf(float __x) _NOEXCEPT {
+  return __builtin_isinf(__x);
 }
 
-template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
-typename std::enable_if<
-    std::is_arithmetic<_A1>::value && !std::numeric_limits<_A1>::has_infinity,
-    bool>::type
-isinf(_A1) _NOEXCEPT
-{ return false; }
-
-#ifdef _LIBCPP_PREFERRED_OVERLOAD
-inline _LIBCPP_INLINE_VISIBILITY
-bool
-isinf(float __lcpp_x) _NOEXCEPT { return __libcpp_isinf(__lcpp_x); }
-
-inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_PREFERRED_OVERLOAD
-bool
-isinf(double __lcpp_x) _NOEXCEPT { return __libcpp_isinf(__lcpp_x); }
-
-inline _LIBCPP_INLINE_VISIBILITY
-bool
-isinf(long double __lcpp_x) _NOEXCEPT { return __libcpp_isinf(__lcpp_x); }
-#endif
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_CONSTEXPR_SINCE_CXX23 _LIBCPP_HIDE_FROM_ABI _LIBCPP_PREFERRED_OVERLOAD bool isinf(double __x) _NOEXCEPT {
+  return __builtin_isinf(__x);
+}
 
-#endif // isinf
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_CONSTEXPR_SINCE_CXX23 _LIBCPP_HIDE_FROM_ABI bool isinf(long double __x) _NOEXCEPT {
+  return __builtin_isinf(__x);
+}
+#      endif
 
 // isnan
 
-#ifdef isnan
-
-template <class _A1>
-_LIBCPP_INLINE_VISIBILITY
-bool
-__libcpp_isnan(_A1 __lcpp_x) _NOEXCEPT
-{
-#if __has_builtin(__builtin_isnan)
-    return __builtin_isnan(__lcpp_x);
-#else
-    return isnan(__lcpp_x);
-#endif
+template <class _A1, std::__enable_if_t<std::is_floating_point<_A1>::value, int> = 0>
+_LIBCPP_NODISCARD_EXT _LIBCPP_CONSTEXPR_SINCE_CXX23 _LIBCPP_HIDE_FROM_ABI bool isnan(_A1 __x) _NOEXCEPT {
+  return __builtin_isnan(__x);
 }
 
-#undef isnan
+template <class _A1, std::__enable_if_t<std::is_integral<_A1>::value, int> = 0>
+_LIBCPP_NODISCARD_EXT _LIBCPP_CONSTEXPR_SINCE_CXX23 _LIBCPP_HIDE_FROM_ABI bool isnan(_A1) _NOEXCEPT {
+  return false;
+}
 
-template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
-typename std::enable_if<std::is_floating_point<_A1>::value, bool>::type
-isnan(_A1 __lcpp_x) _NOEXCEPT
-{
-    return __libcpp_isnan((typename std::__promote<_A1>::type)__lcpp_x);
+#      ifdef _LIBCPP_PREFERRED_OVERLOAD
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_CONSTEXPR_SINCE_CXX23 _LIBCPP_HIDE_FROM_ABI bool isnan(float __x) _NOEXCEPT {
+  return __builtin_isnan(__x);
 }
 
-template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
-typename std::enable_if<std::is_integral<_A1>::value, bool>::type
-isnan(_A1) _NOEXCEPT
-{ return false; }
-
-#ifdef _LIBCPP_PREFERRED_OVERLOAD
-inline _LIBCPP_INLINE_VISIBILITY
-bool
-isnan(float __lcpp_x) _NOEXCEPT { return __libcpp_isnan(__lcpp_x); }
-
-inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_PREFERRED_OVERLOAD
-bool
-isnan(double __lcpp_x) _NOEXCEPT { return __libcpp_isnan(__lcpp_x); }
-
-inline _LIBCPP_INLINE_VISIBILITY
-bool
-isnan(long double __lcpp_x) _NOEXCEPT { return __libcpp_isnan(__lcpp_x); }
-#endif
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_CONSTEXPR_SINCE_CXX23 _LIBCPP_HIDE_FROM_ABI _LIBCPP_PREFERRED_OVERLOAD bool isnan(double __x) _NOEXCEPT {
+  return __builtin_isnan(__x);
+}
 
-#endif // isnan
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_CONSTEXPR_SINCE_CXX23 _LIBCPP_HIDE_FROM_ABI bool isnan(long double __x) _NOEXCEPT {
+  return __builtin_isnan(__x);
+}
+#      endif
 
 // isnormal
 
-#ifdef isnormal
-
-template <class _A1>
-_LIBCPP_INLINE_VISIBILITY
-bool
-__libcpp_isnormal(_A1 __lcpp_x) _NOEXCEPT
-{
-#if __has_builtin(__builtin_isnormal)
-    return __builtin_isnormal(__lcpp_x);
-#else
-    return isnormal(__lcpp_x);
-#endif
+template <class _A1, std::__enable_if_t<std::is_floating_point<_A1>::value, int> = 0>
+_LIBCPP_NODISCARD_EXT _LIBCPP_CONSTEXPR_SINCE_CXX23 _LIBCPP_HIDE_FROM_ABI bool isnormal(_A1 __x) _NOEXCEPT {
+  return __builtin_isnormal(__x);
 }
 
-#undef isnormal
-
-template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
-typename std::enable_if<std::is_floating_point<_A1>::value, bool>::type
-isnormal(_A1 __lcpp_x) _NOEXCEPT
-{
-    return __libcpp_isnormal((typename std::__promote<_A1>::type)__lcpp_x);
+template <class _A1, std::__enable_if_t<std::is_integral<_A1>::value, int> = 0>
+_LIBCPP_NODISCARD_EXT _LIBCPP_CONSTEXPR_SINCE_CXX23 _LIBCPP_HIDE_FROM_ABI bool isnormal(_A1 __x) _NOEXCEPT {
+  return __x != 0;
 }
 
-template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
-typename std::enable_if<std::is_integral<_A1>::value, bool>::type
-isnormal(_A1 __lcpp_x) _NOEXCEPT
-{ return __lcpp_x != 0; }
-
-#endif // isnormal
-
 // isgreater
 
-#ifdef isgreater
-
-template <class _A1, class _A2>
-_LIBCPP_INLINE_VISIBILITY
-bool
-__libcpp_isgreater(_A1 __lcpp_x, _A2 __lcpp_y) _NOEXCEPT
-{
-    return isgreater(__lcpp_x, __lcpp_y);
-}
-
-#undef isgreater
-
-template <class _A1, class _A2>
-inline _LIBCPP_INLINE_VISIBILITY
-typename std::enable_if
-<
-    std::is_arithmetic<_A1>::value &&
-    std::is_arithmetic<_A2>::value,
-    bool
->::type
-isgreater(_A1 __lcpp_x, _A2 __lcpp_y) _NOEXCEPT
-{
-    typedef typename std::__promote<_A1, _A2>::type type;
-    return __libcpp_isgreater((type)__lcpp_x, (type)__lcpp_y);
+template <class _A1,
+          class _A2,
+          std::__enable_if_t<std::is_arithmetic<_A1>::value && std::is_arithmetic<_A2>::value, int> = 0>
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI bool isgreater(_A1 __x, _A2 __y) _NOEXCEPT {
+  typedef typename std::__promote<_A1, _A2>::type type;
+  return __builtin_isgreater((type)__x, (type)__y);
 }
 
-#endif // isgreater
-
 // isgreaterequal
 
-#ifdef isgreaterequal
-
-template <class _A1, class _A2>
-_LIBCPP_INLINE_VISIBILITY
-bool
-__libcpp_isgreaterequal(_A1 __lcpp_x, _A2 __lcpp_y) _NOEXCEPT
-{
-    return isgreaterequal(__lcpp_x, __lcpp_y);
-}
-
-#undef isgreaterequal
-
-template <class _A1, class _A2>
-inline _LIBCPP_INLINE_VISIBILITY
-typename std::enable_if
-<
-    std::is_arithmetic<_A1>::value &&
-    std::is_arithmetic<_A2>::value,
-    bool
->::type
-isgreaterequal(_A1 __lcpp_x, _A2 __lcpp_y) _NOEXCEPT
-{
-    typedef typename std::__promote<_A1, _A2>::type type;
-    return __libcpp_isgreaterequal((type)__lcpp_x, (type)__lcpp_y);
+template <class _A1,
+          class _A2,
+          std::__enable_if_t<std::is_arithmetic<_A1>::value && std::is_arithmetic<_A2>::value, int> = 0>
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI bool isgreaterequal(_A1 __x, _A2 __y) _NOEXCEPT {
+  typedef typename std::__promote<_A1, _A2>::type type;
+  return __builtin_isgreaterequal((type)__x, (type)__y);
 }
 
-#endif // isgreaterequal
-
 // isless
 
-#ifdef isless
-
-template <class _A1, class _A2>
-_LIBCPP_INLINE_VISIBILITY
-bool
-__libcpp_isless(_A1 __lcpp_x, _A2 __lcpp_y) _NOEXCEPT
-{
-    return isless(__lcpp_x, __lcpp_y);
+template <class _A1,
+          class _A2,
+          std::__enable_if_t<std::is_arithmetic<_A1>::value && std::is_arithmetic<_A2>::value, int> = 0>
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI bool isless(_A1 __x, _A2 __y) _NOEXCEPT {
+  typedef typename std::__promote<_A1, _A2>::type type;
+  return __builtin_isless((type)__x, (type)__y);
 }
 
-#undef isless
-
-template <class _A1, class _A2>
-inline _LIBCPP_INLINE_VISIBILITY
-typename std::enable_if
-<
-    std::is_arithmetic<_A1>::value &&
-    std::is_arithmetic<_A2>::value,
-    bool
->::type
-isless(_A1 __lcpp_x, _A2 __lcpp_y) _NOEXCEPT
-{
-    typedef typename std::__promote<_A1, _A2>::type type;
-    return __libcpp_isless((type)__lcpp_x, (type)__lcpp_y);
-}
-
-#endif // isless
-
 // islessequal
 
-#ifdef islessequal
-
-template <class _A1, class _A2>
-_LIBCPP_INLINE_VISIBILITY
-bool
-__libcpp_islessequal(_A1 __lcpp_x, _A2 __lcpp_y) _NOEXCEPT
-{
-    return islessequal(__lcpp_x, __lcpp_y);
+template <class _A1,
+          class _A2,
+          std::__enable_if_t<std::is_arithmetic<_A1>::value && std::is_arithmetic<_A2>::value, int> = 0>
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI bool islessequal(_A1 __x, _A2 __y) _NOEXCEPT {
+  typedef typename std::__promote<_A1, _A2>::type type;
+  return __builtin_islessequal((type)__x, (type)__y);
 }
 
-#undef islessequal
-
-template <class _A1, class _A2>
-inline _LIBCPP_INLINE_VISIBILITY
-typename std::enable_if
-<
-    std::is_arithmetic<_A1>::value &&
-    std::is_arithmetic<_A2>::value,
-    bool
->::type
-islessequal(_A1 __lcpp_x, _A2 __lcpp_y) _NOEXCEPT
-{
-    typedef typename std::__promote<_A1, _A2>::type type;
-    return __libcpp_islessequal((type)__lcpp_x, (type)__lcpp_y);
-}
-
-#endif // islessequal
-
 // islessgreater
 
-#ifdef islessgreater
-
-template <class _A1, class _A2>
-_LIBCPP_INLINE_VISIBILITY
-bool
-__libcpp_islessgreater(_A1 __lcpp_x, _A2 __lcpp_y) _NOEXCEPT
-{
-    return islessgreater(__lcpp_x, __lcpp_y);
-}
-
-#undef islessgreater
-
-template <class _A1, class _A2>
-inline _LIBCPP_INLINE_VISIBILITY
-typename std::enable_if
-<
-    std::is_arithmetic<_A1>::value &&
-    std::is_arithmetic<_A2>::value,
-    bool
->::type
-islessgreater(_A1 __lcpp_x, _A2 __lcpp_y) _NOEXCEPT
-{
-    typedef typename std::__promote<_A1, _A2>::type type;
-    return __libcpp_islessgreater((type)__lcpp_x, (type)__lcpp_y);
+template <class _A1,
+          class _A2,
+          std::__enable_if_t<std::is_arithmetic<_A1>::value && std::is_arithmetic<_A2>::value, int> = 0>
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI bool islessgreater(_A1 __x, _A2 __y) _NOEXCEPT {
+  typedef typename std::__promote<_A1, _A2>::type type;
+  return __builtin_islessgreater((type)__x, (type)__y);
 }
 
-#endif // islessgreater
-
 // isunordered
 
-#ifdef isunordered
-
-template <class _A1, class _A2>
-_LIBCPP_INLINE_VISIBILITY
-bool
-__libcpp_isunordered(_A1 __lcpp_x, _A2 __lcpp_y) _NOEXCEPT
-{
-    return isunordered(__lcpp_x, __lcpp_y);
+template <class _A1,
+          class _A2,
+          std::__enable_if_t<std::is_arithmetic<_A1>::value && std::is_arithmetic<_A2>::value, int> = 0>
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI bool isunordered(_A1 __x, _A2 __y) _NOEXCEPT {
+  typedef typename std::__promote<_A1, _A2>::type type;
+  return __builtin_isunordered((type)__x, (type)__y);
 }
 
-#undef isunordered
-
-template <class _A1, class _A2>
-inline _LIBCPP_INLINE_VISIBILITY
-typename std::enable_if
-<
-    std::is_arithmetic<_A1>::value &&
-    std::is_arithmetic<_A2>::value,
-    bool
->::type
-isunordered(_A1 __lcpp_x, _A2 __lcpp_y) _NOEXCEPT
-{
-    typedef typename std::__promote<_A1, _A2>::type type;
-    return __libcpp_isunordered((type)__lcpp_x, (type)__lcpp_y);
-}
-
-#endif // isunordered
+#endif // _LIBCPP_MSVCRT
 
 // abs
 //
@@ -786,960 +547,1146 @@ isunordered(_A1 __lcpp_x, _A2 __lcpp_y) _NOEXCEPT
 //
 // handled in stdlib.h
 
+// We have to provide double overloads for <math.h> to work on platforms that don't provide the full set of math
+// functions. To make the overload set work with multiple functions that take the same arguments, we make our overloads
+// templates. Functions are preferred over function templates during overload resolution, which means that our overload
+// will only be selected when the C library doesn't provide one.
+
 // acos
 
-#if !(defined(_AIX) || defined(__sun__))
-inline _LIBCPP_INLINE_VISIBILITY float       acos(float __lcpp_x) _NOEXCEPT       {return ::acosf(__lcpp_x);}
-inline _LIBCPP_INLINE_VISIBILITY long double acos(long double __lcpp_x) _NOEXCEPT {return ::acosl(__lcpp_x);}
-#endif
+#    if !defined(__sun__)
+inline _LIBCPP_HIDE_FROM_ABI float       acos(float __x) _NOEXCEPT       {return __builtin_acosf(__x);}
+
+template <class = int>
+_LIBCPP_HIDE_FROM_ABI double acos(double __x) _NOEXCEPT {
+  return __builtin_acos(__x);
+}
+
+inline _LIBCPP_HIDE_FROM_ABI long double acos(long double __x) _NOEXCEPT {return __builtin_acosl(__x);}
+#    endif
 
 template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_HIDE_FROM_ABI
 typename std::enable_if<std::is_integral<_A1>::value, double>::type
-acos(_A1 __lcpp_x) _NOEXCEPT {return ::acos((double)__lcpp_x);}
+acos(_A1 __x) _NOEXCEPT {return __builtin_acos((double)__x);}
 
 // asin
 
-#if !(defined(_AIX) || defined(__sun__))
-inline _LIBCPP_INLINE_VISIBILITY float       asin(float __lcpp_x) _NOEXCEPT       {return ::asinf(__lcpp_x);}
-inline _LIBCPP_INLINE_VISIBILITY long double asin(long double __lcpp_x) _NOEXCEPT {return ::asinl(__lcpp_x);}
-#endif
+#    if !defined(__sun__)
+inline _LIBCPP_HIDE_FROM_ABI float       asin(float __x) _NOEXCEPT       {return __builtin_asinf(__x);}
+
+template <class = int>
+_LIBCPP_HIDE_FROM_ABI double asin(double __x) _NOEXCEPT {
+  return __builtin_asin(__x);
+}
+
+inline _LIBCPP_HIDE_FROM_ABI long double asin(long double __x) _NOEXCEPT {return __builtin_asinl(__x);}
+#    endif
 
 template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_HIDE_FROM_ABI
 typename std::enable_if<std::is_integral<_A1>::value, double>::type
-asin(_A1 __lcpp_x) _NOEXCEPT {return ::asin((double)__lcpp_x);}
+asin(_A1 __x) _NOEXCEPT {return __builtin_asin((double)__x);}
 
 // atan
 
-#if !(defined(_AIX) || defined(__sun__))
-inline _LIBCPP_INLINE_VISIBILITY float       atan(float __lcpp_x) _NOEXCEPT       {return ::atanf(__lcpp_x);}
-inline _LIBCPP_INLINE_VISIBILITY long double atan(long double __lcpp_x) _NOEXCEPT {return ::atanl(__lcpp_x);}
-#endif
+#    if !defined(__sun__)
+inline _LIBCPP_HIDE_FROM_ABI float       atan(float __x) _NOEXCEPT       {return __builtin_atanf(__x);}
+
+template <class = int>
+_LIBCPP_HIDE_FROM_ABI double atan(double __x) _NOEXCEPT {
+  return __builtin_atan(__x);
+}
+
+inline _LIBCPP_HIDE_FROM_ABI long double atan(long double __x) _NOEXCEPT {return __builtin_atanl(__x);}
+#    endif
 
 template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_HIDE_FROM_ABI
 typename std::enable_if<std::is_integral<_A1>::value, double>::type
-atan(_A1 __lcpp_x) _NOEXCEPT {return ::atan((double)__lcpp_x);}
+atan(_A1 __x) _NOEXCEPT {return __builtin_atan((double)__x);}
 
 // atan2
 
-#if !(defined(_AIX) || defined(__sun__))
-inline _LIBCPP_INLINE_VISIBILITY float       atan2(float __lcpp_y, float __lcpp_x) _NOEXCEPT             {return ::atan2f(__lcpp_y, __lcpp_x);}
-inline _LIBCPP_INLINE_VISIBILITY long double atan2(long double __lcpp_y, long double __lcpp_x) _NOEXCEPT {return ::atan2l(__lcpp_y, __lcpp_x);}
-#endif
+#    if !defined(__sun__)
+inline _LIBCPP_HIDE_FROM_ABI float       atan2(float __y, float __x) _NOEXCEPT             {return __builtin_atan2f(__y, __x);}
+
+template <class = int>
+_LIBCPP_HIDE_FROM_ABI double atan2(double __x, double __y) _NOEXCEPT {
+  return __builtin_atan2(__x, __y);
+}
+
+inline _LIBCPP_HIDE_FROM_ABI long double atan2(long double __y, long double __x) _NOEXCEPT {return __builtin_atan2l(__y, __x);}
+#    endif
 
 template <class _A1, class _A2>
-inline _LIBCPP_INLINE_VISIBILITY
-typename std::_EnableIf
+inline _LIBCPP_HIDE_FROM_ABI
+typename std::__enable_if_t
 <
     std::is_arithmetic<_A1>::value &&
     std::is_arithmetic<_A2>::value,
     std::__promote<_A1, _A2>
 >::type
-atan2(_A1 __lcpp_y, _A2 __lcpp_x) _NOEXCEPT
+atan2(_A1 __y, _A2 __x) _NOEXCEPT
 {
     typedef typename std::__promote<_A1, _A2>::type __result_type;
     static_assert((!(std::_IsSame<_A1, __result_type>::value &&
                      std::_IsSame<_A2, __result_type>::value)), "");
-    return ::atan2((__result_type)__lcpp_y, (__result_type)__lcpp_x);
+    return ::atan2((__result_type)__y, (__result_type)__x);
 }
 
 // ceil
 
-#if !(defined(_AIX) || defined(__sun__))
-inline _LIBCPP_INLINE_VISIBILITY float       ceil(float __lcpp_x) _NOEXCEPT       {return ::ceilf(__lcpp_x);}
-inline _LIBCPP_INLINE_VISIBILITY long double ceil(long double __lcpp_x) _NOEXCEPT {return ::ceill(__lcpp_x);}
-#endif
+#    if !defined(__sun__)
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI float       ceil(float __x) _NOEXCEPT       {return __builtin_ceilf(__x);}
+
+template <class = int>
+_LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI double ceil(double __x) _NOEXCEPT {
+  return __builtin_ceil(__x);
+}
+
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI long double ceil(long double __x) _NOEXCEPT {return __builtin_ceill(__x);}
+#    endif
 
 template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI
 typename std::enable_if<std::is_integral<_A1>::value, double>::type
-ceil(_A1 __lcpp_x) _NOEXCEPT {return ::ceil((double)__lcpp_x);}
+ceil(_A1 __x) _NOEXCEPT {return __builtin_ceil((double)__x);}
 
 // cos
 
-#if !(defined(_AIX) || defined(__sun__))
-inline _LIBCPP_INLINE_VISIBILITY float       cos(float __lcpp_x) _NOEXCEPT       {return ::cosf(__lcpp_x);}
-inline _LIBCPP_INLINE_VISIBILITY long double cos(long double __lcpp_x) _NOEXCEPT {return ::cosl(__lcpp_x);}
-#endif
+#    if !defined(__sun__)
+inline _LIBCPP_HIDE_FROM_ABI float       cos(float __x) _NOEXCEPT       {return __builtin_cosf(__x);}
+
+template <class = int>
+_LIBCPP_HIDE_FROM_ABI double cos(double __x) _NOEXCEPT {
+  return __builtin_cos(__x);
+}
+
+inline _LIBCPP_HIDE_FROM_ABI long double cos(long double __x) _NOEXCEPT {return __builtin_cosl(__x);}
+#    endif
 
 template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_HIDE_FROM_ABI
 typename std::enable_if<std::is_integral<_A1>::value, double>::type
-cos(_A1 __lcpp_x) _NOEXCEPT {return ::cos((double)__lcpp_x);}
+cos(_A1 __x) _NOEXCEPT {return __builtin_cos((double)__x);}
 
 // cosh
 
-#if !(defined(_AIX) || defined(__sun__))
-inline _LIBCPP_INLINE_VISIBILITY float       cosh(float __lcpp_x) _NOEXCEPT       {return ::coshf(__lcpp_x);}
-inline _LIBCPP_INLINE_VISIBILITY long double cosh(long double __lcpp_x) _NOEXCEPT {return ::coshl(__lcpp_x);}
-#endif
+#    if !defined(__sun__)
+inline _LIBCPP_HIDE_FROM_ABI float       cosh(float __x) _NOEXCEPT       {return __builtin_coshf(__x);}
+
+template <class = int>
+_LIBCPP_HIDE_FROM_ABI double cosh(double __x) _NOEXCEPT {
+  return __builtin_cosh(__x);
+}
+
+inline _LIBCPP_HIDE_FROM_ABI long double cosh(long double __x) _NOEXCEPT {return __builtin_coshl(__x);}
+#    endif
 
 template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_HIDE_FROM_ABI
 typename std::enable_if<std::is_integral<_A1>::value, double>::type
-cosh(_A1 __lcpp_x) _NOEXCEPT {return ::cosh((double)__lcpp_x);}
+cosh(_A1 __x) _NOEXCEPT {return __builtin_cosh((double)__x);}
 
 // exp
 
-#if !(defined(_AIX) || defined(__sun__))
-inline _LIBCPP_INLINE_VISIBILITY float       exp(float __lcpp_x) _NOEXCEPT       {return ::expf(__lcpp_x);}
-inline _LIBCPP_INLINE_VISIBILITY long double exp(long double __lcpp_x) _NOEXCEPT {return ::expl(__lcpp_x);}
-#endif
+#    if !defined(__sun__)
+inline _LIBCPP_HIDE_FROM_ABI float       exp(float __x) _NOEXCEPT       {return __builtin_expf(__x);}
+
+template <class = int>
+_LIBCPP_HIDE_FROM_ABI double exp(double __x) _NOEXCEPT {
+  return __builtin_exp(__x);
+}
+
+inline _LIBCPP_HIDE_FROM_ABI long double exp(long double __x) _NOEXCEPT {return __builtin_expl(__x);}
+#    endif
 
 template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_HIDE_FROM_ABI
 typename std::enable_if<std::is_integral<_A1>::value, double>::type
-exp(_A1 __lcpp_x) _NOEXCEPT {return ::exp((double)__lcpp_x);}
+exp(_A1 __x) _NOEXCEPT {return __builtin_exp((double)__x);}
 
 // fabs
 
-#if !(defined(_AIX) || defined(__sun__))
-inline _LIBCPP_INLINE_VISIBILITY float       fabs(float __lcpp_x) _NOEXCEPT       {return ::fabsf(__lcpp_x);}
-inline _LIBCPP_INLINE_VISIBILITY long double fabs(long double __lcpp_x) _NOEXCEPT {return ::fabsl(__lcpp_x);}
-#endif
+#    if !defined(__sun__)
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI float       fabs(float __x) _NOEXCEPT       {return __builtin_fabsf(__x);}
+
+template <class = int>
+_LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI double fabs(double __x) _NOEXCEPT {
+  return __builtin_fabs(__x);
+}
+
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI long double fabs(long double __x) _NOEXCEPT {return __builtin_fabsl(__x);}
+#    endif
 
 template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI
 typename std::enable_if<std::is_integral<_A1>::value, double>::type
-fabs(_A1 __lcpp_x) _NOEXCEPT {return ::fabs((double)__lcpp_x);}
+fabs(_A1 __x) _NOEXCEPT {return __builtin_fabs((double)__x);}
 
 // floor
 
-#if !(defined(_AIX) || defined(__sun__))
-inline _LIBCPP_INLINE_VISIBILITY float       floor(float __lcpp_x) _NOEXCEPT       {return ::floorf(__lcpp_x);}
-inline _LIBCPP_INLINE_VISIBILITY long double floor(long double __lcpp_x) _NOEXCEPT {return ::floorl(__lcpp_x);}
-#endif
+#    if !defined(__sun__)
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI float       floor(float __x) _NOEXCEPT       {return __builtin_floorf(__x);}
+
+template <class = int>
+_LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI double floor(double __x) _NOEXCEPT {
+  return __builtin_floor(__x);
+}
+
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI long double floor(long double __x) _NOEXCEPT {return __builtin_floorl(__x);}
+#    endif
 
 template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI
 typename std::enable_if<std::is_integral<_A1>::value, double>::type
-floor(_A1 __lcpp_x) _NOEXCEPT {return ::floor((double)__lcpp_x);}
+floor(_A1 __x) _NOEXCEPT {return __builtin_floor((double)__x);}
 
 // fmod
 
-#if !(defined(_AIX) || defined(__sun__))
-inline _LIBCPP_INLINE_VISIBILITY float       fmod(float __lcpp_x, float __lcpp_y) _NOEXCEPT             {return ::fmodf(__lcpp_x, __lcpp_y);}
-inline _LIBCPP_INLINE_VISIBILITY long double fmod(long double __lcpp_x, long double __lcpp_y) _NOEXCEPT {return ::fmodl(__lcpp_x, __lcpp_y);}
-#endif
+#    if !defined(__sun__)
+inline _LIBCPP_HIDE_FROM_ABI float       fmod(float __x, float __y) _NOEXCEPT             {return __builtin_fmodf(__x, __y);}
+
+template <class = int>
+_LIBCPP_HIDE_FROM_ABI double fmod(double __x, double __y) _NOEXCEPT {
+  return __builtin_fmod(__x, __y);
+}
+
+inline _LIBCPP_HIDE_FROM_ABI long double fmod(long double __x, long double __y) _NOEXCEPT {return __builtin_fmodl(__x, __y);}
+#    endif
 
 template <class _A1, class _A2>
-inline _LIBCPP_INLINE_VISIBILITY
-typename std::_EnableIf
+inline _LIBCPP_HIDE_FROM_ABI
+typename std::__enable_if_t
 <
     std::is_arithmetic<_A1>::value &&
     std::is_arithmetic<_A2>::value,
     std::__promote<_A1, _A2>
 >::type
-fmod(_A1 __lcpp_x, _A2 __lcpp_y) _NOEXCEPT
+fmod(_A1 __x, _A2 __y) _NOEXCEPT
 {
     typedef typename std::__promote<_A1, _A2>::type __result_type;
     static_assert((!(std::_IsSame<_A1, __result_type>::value &&
                      std::_IsSame<_A2, __result_type>::value)), "");
-    return ::fmod((__result_type)__lcpp_x, (__result_type)__lcpp_y);
+    return ::fmod((__result_type)__x, (__result_type)__y);
 }
 
 // frexp
 
-#if !(defined(_AIX) || defined(__sun__))
-inline _LIBCPP_INLINE_VISIBILITY float       frexp(float __lcpp_x, int* __lcpp_e) _NOEXCEPT       {return ::frexpf(__lcpp_x, __lcpp_e);}
-inline _LIBCPP_INLINE_VISIBILITY long double frexp(long double __lcpp_x, int* __lcpp_e) _NOEXCEPT {return ::frexpl(__lcpp_x, __lcpp_e);}
-#endif
+#    if !defined(__sun__)
+inline _LIBCPP_HIDE_FROM_ABI float       frexp(float __x, int* __e) _NOEXCEPT       {return __builtin_frexpf(__x, __e);}
+
+template <class = int>
+_LIBCPP_HIDE_FROM_ABI double frexp(double __x, int* __e) _NOEXCEPT {
+  return __builtin_frexp(__x, __e);
+}
+
+inline _LIBCPP_HIDE_FROM_ABI long double frexp(long double __x, int* __e) _NOEXCEPT {return __builtin_frexpl(__x, __e);}
+#    endif
 
 template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_HIDE_FROM_ABI
 typename std::enable_if<std::is_integral<_A1>::value, double>::type
-frexp(_A1 __lcpp_x, int* __lcpp_e) _NOEXCEPT {return ::frexp((double)__lcpp_x, __lcpp_e);}
+frexp(_A1 __x, int* __e) _NOEXCEPT {return __builtin_frexp((double)__x, __e);}
 
 // ldexp
 
-#if !(defined(_AIX) || defined(__sun__))
-inline _LIBCPP_INLINE_VISIBILITY float       ldexp(float __lcpp_x, int __lcpp_e) _NOEXCEPT       {return ::ldexpf(__lcpp_x, __lcpp_e);}
-inline _LIBCPP_INLINE_VISIBILITY long double ldexp(long double __lcpp_x, int __lcpp_e) _NOEXCEPT {return ::ldexpl(__lcpp_x, __lcpp_e);}
-#endif
+#    if !defined(__sun__)
+inline _LIBCPP_HIDE_FROM_ABI float       ldexp(float __x, int __e) _NOEXCEPT       {return __builtin_ldexpf(__x, __e);}
+
+template <class = int>
+_LIBCPP_HIDE_FROM_ABI double ldexp(double __x, int __e) _NOEXCEPT {
+  return __builtin_ldexp(__x, __e);
+}
+
+inline _LIBCPP_HIDE_FROM_ABI long double ldexp(long double __x, int __e) _NOEXCEPT {return __builtin_ldexpl(__x, __e);}
+#    endif
 
 template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_HIDE_FROM_ABI
 typename std::enable_if<std::is_integral<_A1>::value, double>::type
-ldexp(_A1 __lcpp_x, int __lcpp_e) _NOEXCEPT {return ::ldexp((double)__lcpp_x, __lcpp_e);}
+ldexp(_A1 __x, int __e) _NOEXCEPT {return __builtin_ldexp((double)__x, __e);}
 
 // log
 
-#if !(defined(_AIX) || defined(__sun__))
-inline _LIBCPP_INLINE_VISIBILITY float       log(float __lcpp_x) _NOEXCEPT       {return ::logf(__lcpp_x);}
-inline _LIBCPP_INLINE_VISIBILITY long double log(long double __lcpp_x) _NOEXCEPT {return ::logl(__lcpp_x);}
-#endif
+#    if !defined(__sun__)
+inline _LIBCPP_HIDE_FROM_ABI float       log(float __x) _NOEXCEPT       {return __builtin_logf(__x);}
+
+template <class = int>
+_LIBCPP_HIDE_FROM_ABI double log(double __x) _NOEXCEPT {
+  return __builtin_log(__x);
+}
+
+inline _LIBCPP_HIDE_FROM_ABI long double log(long double __x) _NOEXCEPT {return __builtin_logl(__x);}
+#    endif
 
 template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_HIDE_FROM_ABI
 typename std::enable_if<std::is_integral<_A1>::value, double>::type
-log(_A1 __lcpp_x) _NOEXCEPT {return ::log((double)__lcpp_x);}
+log(_A1 __x) _NOEXCEPT {return __builtin_log((double)__x);}
 
 // log10
 
-#if !(defined(_AIX) || defined(__sun__))
-inline _LIBCPP_INLINE_VISIBILITY float       log10(float __lcpp_x) _NOEXCEPT       {return ::log10f(__lcpp_x);}
-inline _LIBCPP_INLINE_VISIBILITY long double log10(long double __lcpp_x) _NOEXCEPT {return ::log10l(__lcpp_x);}
-#endif
+#    if !defined(__sun__)
+inline _LIBCPP_HIDE_FROM_ABI float       log10(float __x) _NOEXCEPT       {return __builtin_log10f(__x);}
+
+
+template <class = int>
+_LIBCPP_HIDE_FROM_ABI double log10(double __x) _NOEXCEPT {
+  return __builtin_log10(__x);
+}
+
+inline _LIBCPP_HIDE_FROM_ABI long double log10(long double __x) _NOEXCEPT {return __builtin_log10l(__x);}
+#    endif
 
 template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_HIDE_FROM_ABI
 typename std::enable_if<std::is_integral<_A1>::value, double>::type
-log10(_A1 __lcpp_x) _NOEXCEPT {return ::log10((double)__lcpp_x);}
+log10(_A1 __x) _NOEXCEPT {return __builtin_log10((double)__x);}
 
 // modf
 
-#if !(defined(_AIX) || defined(__sun__))
-inline _LIBCPP_INLINE_VISIBILITY float       modf(float __lcpp_x, float* __lcpp_y) _NOEXCEPT             {return ::modff(__lcpp_x, __lcpp_y);}
-inline _LIBCPP_INLINE_VISIBILITY long double modf(long double __lcpp_x, long double* __lcpp_y) _NOEXCEPT {return ::modfl(__lcpp_x, __lcpp_y);}
-#endif
+#    if !defined(__sun__)
+inline _LIBCPP_HIDE_FROM_ABI float       modf(float __x, float* __y) _NOEXCEPT             {return __builtin_modff(__x, __y);}
+
+template <class = int>
+_LIBCPP_HIDE_FROM_ABI double modf(double __x, double* __y) _NOEXCEPT {
+  return __builtin_modf(__x, __y);
+}
+
+inline _LIBCPP_HIDE_FROM_ABI long double modf(long double __x, long double* __y) _NOEXCEPT {return __builtin_modfl(__x, __y);}
+#    endif
 
 // pow
 
-#if !(defined(_AIX) || defined(__sun__))
-inline _LIBCPP_INLINE_VISIBILITY float       pow(float __lcpp_x, float __lcpp_y) _NOEXCEPT             {return ::powf(__lcpp_x, __lcpp_y);}
-inline _LIBCPP_INLINE_VISIBILITY long double pow(long double __lcpp_x, long double __lcpp_y) _NOEXCEPT {return ::powl(__lcpp_x, __lcpp_y);}
-#endif
+#    if !defined(__sun__)
+inline _LIBCPP_HIDE_FROM_ABI float       pow(float __x, float __y) _NOEXCEPT             {return __builtin_powf(__x, __y);}
+
+template <class = int>
+_LIBCPP_HIDE_FROM_ABI double pow(double __x, double __y) _NOEXCEPT {
+  return __builtin_pow(__x, __y);
+}
+
+inline _LIBCPP_HIDE_FROM_ABI long double pow(long double __x, long double __y) _NOEXCEPT {return __builtin_powl(__x, __y);}
+#    endif
 
 template <class _A1, class _A2>
-inline _LIBCPP_INLINE_VISIBILITY
-typename std::_EnableIf
+inline _LIBCPP_HIDE_FROM_ABI
+typename std::__enable_if_t
 <
     std::is_arithmetic<_A1>::value &&
     std::is_arithmetic<_A2>::value,
     std::__promote<_A1, _A2>
 >::type
-pow(_A1 __lcpp_x, _A2 __lcpp_y) _NOEXCEPT
+pow(_A1 __x, _A2 __y) _NOEXCEPT
 {
     typedef typename std::__promote<_A1, _A2>::type __result_type;
     static_assert((!(std::_IsSame<_A1, __result_type>::value &&
                      std::_IsSame<_A2, __result_type>::value)), "");
-    return ::pow((__result_type)__lcpp_x, (__result_type)__lcpp_y);
+    return ::pow((__result_type)__x, (__result_type)__y);
 }
 
 // sin
 
-#if !(defined(_AIX) || defined(__sun__))
-inline _LIBCPP_INLINE_VISIBILITY float       sin(float __lcpp_x) _NOEXCEPT       {return ::sinf(__lcpp_x);}
-inline _LIBCPP_INLINE_VISIBILITY long double sin(long double __lcpp_x) _NOEXCEPT {return ::sinl(__lcpp_x);}
+#    if !defined(__sun__)
+inline _LIBCPP_HIDE_FROM_ABI float       sin(float __x) _NOEXCEPT       {return __builtin_sinf(__x);}
+
+template <class = int>
+_LIBCPP_HIDE_FROM_ABI double sin(double __x) _NOEXCEPT {
+  return __builtin_sin(__x);
+}
+
+inline _LIBCPP_HIDE_FROM_ABI long double sin(long double __x) _NOEXCEPT {return __builtin_sinl(__x);}
 #endif
 
 template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_HIDE_FROM_ABI
 typename std::enable_if<std::is_integral<_A1>::value, double>::type
-sin(_A1 __lcpp_x) _NOEXCEPT {return ::sin((double)__lcpp_x);}
+sin(_A1 __x) _NOEXCEPT {return __builtin_sin((double)__x);}
 
 // sinh
 
-#if !(defined(_AIX) || defined(__sun__))
-inline _LIBCPP_INLINE_VISIBILITY float       sinh(float __lcpp_x) _NOEXCEPT       {return ::sinhf(__lcpp_x);}
-inline _LIBCPP_INLINE_VISIBILITY long double sinh(long double __lcpp_x) _NOEXCEPT {return ::sinhl(__lcpp_x);}
-#endif
+#    if !defined(__sun__)
+inline _LIBCPP_HIDE_FROM_ABI float       sinh(float __x) _NOEXCEPT       {return __builtin_sinhf(__x);}
+
+template <class = int>
+_LIBCPP_HIDE_FROM_ABI double sinh(double __x) _NOEXCEPT {
+  return __builtin_sinh(__x);
+}
+
+inline _LIBCPP_HIDE_FROM_ABI long double sinh(long double __x) _NOEXCEPT {return __builtin_sinhl(__x);}
+#    endif
 
 template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_HIDE_FROM_ABI
 typename std::enable_if<std::is_integral<_A1>::value, double>::type
-sinh(_A1 __lcpp_x) _NOEXCEPT {return ::sinh((double)__lcpp_x);}
+sinh(_A1 __x) _NOEXCEPT {return __builtin_sinh((double)__x);}
 
 // sqrt
 
-#if !(defined(_AIX) || defined(__sun__))
-inline _LIBCPP_INLINE_VISIBILITY float       sqrt(float __lcpp_x) _NOEXCEPT       {return ::sqrtf(__lcpp_x);}
-inline _LIBCPP_INLINE_VISIBILITY long double sqrt(long double __lcpp_x) _NOEXCEPT {return ::sqrtl(__lcpp_x);}
-#endif
+#    if !defined(__sun__)
+inline _LIBCPP_HIDE_FROM_ABI float       sqrt(float __x) _NOEXCEPT       {return __builtin_sqrtf(__x);}
+
+template <class = int>
+_LIBCPP_HIDE_FROM_ABI double sqrt(double __x) _NOEXCEPT {
+  return __builtin_sqrt(__x);
+}
+
+inline _LIBCPP_HIDE_FROM_ABI long double sqrt(long double __x) _NOEXCEPT {return __builtin_sqrtl(__x);}
+#    endif
 
 template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_HIDE_FROM_ABI
 typename std::enable_if<std::is_integral<_A1>::value, double>::type
-sqrt(_A1 __lcpp_x) _NOEXCEPT {return ::sqrt((double)__lcpp_x);}
+sqrt(_A1 __x) _NOEXCEPT {return __builtin_sqrt((double)__x);}
 
 // tan
 
-#if !(defined(_AIX) || defined(__sun__))
-inline _LIBCPP_INLINE_VISIBILITY float       tan(float __lcpp_x) _NOEXCEPT       {return ::tanf(__lcpp_x);}
-inline _LIBCPP_INLINE_VISIBILITY long double tan(long double __lcpp_x) _NOEXCEPT {return ::tanl(__lcpp_x);}
-#endif
+#    if !defined(__sun__)
+inline _LIBCPP_HIDE_FROM_ABI float       tan(float __x) _NOEXCEPT       {return __builtin_tanf(__x);}
+
+template <class = int>
+_LIBCPP_HIDE_FROM_ABI double tan(double __x) _NOEXCEPT {
+  return __builtin_tan(__x);
+}
+
+inline _LIBCPP_HIDE_FROM_ABI long double tan(long double __x) _NOEXCEPT {return __builtin_tanl(__x);}
+#    endif
 
 template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_HIDE_FROM_ABI
 typename std::enable_if<std::is_integral<_A1>::value, double>::type
-tan(_A1 __lcpp_x) _NOEXCEPT {return ::tan((double)__lcpp_x);}
+tan(_A1 __x) _NOEXCEPT {return __builtin_tan((double)__x);}
 
 // tanh
 
-#if !(defined(_AIX) || defined(__sun__))
-inline _LIBCPP_INLINE_VISIBILITY float       tanh(float __lcpp_x) _NOEXCEPT       {return ::tanhf(__lcpp_x);}
-inline _LIBCPP_INLINE_VISIBILITY long double tanh(long double __lcpp_x) _NOEXCEPT {return ::tanhl(__lcpp_x);}
-#endif
+#    if !defined(__sun__)
+inline _LIBCPP_HIDE_FROM_ABI float       tanh(float __x) _NOEXCEPT       {return __builtin_tanhf(__x);}
+
+template <class = int>
+_LIBCPP_HIDE_FROM_ABI double tanh(double __x) _NOEXCEPT {
+  return __builtin_tanh(__x);
+}
+
+inline _LIBCPP_HIDE_FROM_ABI long double tanh(long double __x) _NOEXCEPT {return __builtin_tanhl(__x);}
+#    endif
 
 template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_HIDE_FROM_ABI
 typename std::enable_if<std::is_integral<_A1>::value, double>::type
-tanh(_A1 __lcpp_x) _NOEXCEPT {return ::tanh((double)__lcpp_x);}
+tanh(_A1 __x) _NOEXCEPT {return __builtin_tanh((double)__x);}
 
 // acosh
 
-inline _LIBCPP_INLINE_VISIBILITY float       acosh(float __lcpp_x) _NOEXCEPT       {return ::acoshf(__lcpp_x);}
-inline _LIBCPP_INLINE_VISIBILITY long double acosh(long double __lcpp_x) _NOEXCEPT {return ::acoshl(__lcpp_x);}
+inline _LIBCPP_HIDE_FROM_ABI float       acosh(float __x) _NOEXCEPT       {return __builtin_acoshf(__x);}
+
+template <class = int>
+_LIBCPP_HIDE_FROM_ABI double acosh(double __x) _NOEXCEPT {
+  return __builtin_acosh(__x);
+}
+
+inline _LIBCPP_HIDE_FROM_ABI long double acosh(long double __x) _NOEXCEPT {return __builtin_acoshl(__x);}
 
 template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_HIDE_FROM_ABI
 typename std::enable_if<std::is_integral<_A1>::value, double>::type
-acosh(_A1 __lcpp_x) _NOEXCEPT {return ::acosh((double)__lcpp_x);}
+acosh(_A1 __x) _NOEXCEPT {return __builtin_acosh((double)__x);}
 
 // asinh
 
-inline _LIBCPP_INLINE_VISIBILITY float       asinh(float __lcpp_x) _NOEXCEPT       {return ::asinhf(__lcpp_x);}
-inline _LIBCPP_INLINE_VISIBILITY long double asinh(long double __lcpp_x) _NOEXCEPT {return ::asinhl(__lcpp_x);}
+inline _LIBCPP_HIDE_FROM_ABI float       asinh(float __x) _NOEXCEPT       {return __builtin_asinhf(__x);}
+
+template <class = int>
+_LIBCPP_HIDE_FROM_ABI double asinh(double __x) _NOEXCEPT {
+  return __builtin_asinh(__x);
+}
+
+inline _LIBCPP_HIDE_FROM_ABI long double asinh(long double __x) _NOEXCEPT {return __builtin_asinhl(__x);}
 
 template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_HIDE_FROM_ABI
 typename std::enable_if<std::is_integral<_A1>::value, double>::type
-asinh(_A1 __lcpp_x) _NOEXCEPT {return ::asinh((double)__lcpp_x);}
+asinh(_A1 __x) _NOEXCEPT {return __builtin_asinh((double)__x);}
 
 // atanh
 
-inline _LIBCPP_INLINE_VISIBILITY float       atanh(float __lcpp_x) _NOEXCEPT       {return ::atanhf(__lcpp_x);}
-inline _LIBCPP_INLINE_VISIBILITY long double atanh(long double __lcpp_x) _NOEXCEPT {return ::atanhl(__lcpp_x);}
+inline _LIBCPP_HIDE_FROM_ABI float       atanh(float __x) _NOEXCEPT       {return __builtin_atanhf(__x);}
+
+template <class = int>
+_LIBCPP_HIDE_FROM_ABI double atanh(double __x) _NOEXCEPT {
+  return __builtin_atanh(__x);
+}
+
+inline _LIBCPP_HIDE_FROM_ABI long double atanh(long double __x) _NOEXCEPT {return __builtin_atanhl(__x);}
 
 template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_HIDE_FROM_ABI
 typename std::enable_if<std::is_integral<_A1>::value, double>::type
-atanh(_A1 __lcpp_x) _NOEXCEPT {return ::atanh((double)__lcpp_x);}
+atanh(_A1 __x) _NOEXCEPT {return __builtin_atanh((double)__x);}
 
 // cbrt
 
-inline _LIBCPP_INLINE_VISIBILITY float       cbrt(float __lcpp_x) _NOEXCEPT       {return ::cbrtf(__lcpp_x);}
-inline _LIBCPP_INLINE_VISIBILITY long double cbrt(long double __lcpp_x) _NOEXCEPT {return ::cbrtl(__lcpp_x);}
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI float       cbrt(float __x) _NOEXCEPT       {return __builtin_cbrtf(__x);}
+
+template <class = int>
+_LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI double cbrt(double __x) _NOEXCEPT {
+  return __builtin_cbrt(__x);
+}
+
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI long double cbrt(long double __x) _NOEXCEPT {return __builtin_cbrtl(__x);}
 
 template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI
 typename std::enable_if<std::is_integral<_A1>::value, double>::type
-cbrt(_A1 __lcpp_x) _NOEXCEPT {return ::cbrt((double)__lcpp_x);}
+cbrt(_A1 __x) _NOEXCEPT {return __builtin_cbrt((double)__x);}
 
 // copysign
 
-#if __has_builtin(__builtin_copysignf)
-_LIBCPP_CONSTEXPR
-#endif
-inline _LIBCPP_INLINE_VISIBILITY float __libcpp_copysign(float __lcpp_x, float __lcpp_y) _NOEXCEPT {
-#if __has_builtin(__builtin_copysignf)
-  return __builtin_copysignf(__lcpp_x, __lcpp_y);
-#else
-  return ::copysignf(__lcpp_x, __lcpp_y);
-#endif
-}
-
-#if __has_builtin(__builtin_copysign)
-_LIBCPP_CONSTEXPR
-#endif
-inline _LIBCPP_INLINE_VISIBILITY double __libcpp_copysign(double __lcpp_x, double __lcpp_y) _NOEXCEPT {
-#if __has_builtin(__builtin_copysign)
-  return __builtin_copysign(__lcpp_x, __lcpp_y);
-#else
-  return ::copysign(__lcpp_x, __lcpp_y);
-#endif
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI float copysign(float __x, float __y) _NOEXCEPT {
+  return ::__builtin_copysignf(__x, __y);
 }
 
-#if __has_builtin(__builtin_copysignl)
-_LIBCPP_CONSTEXPR
-#endif
-inline _LIBCPP_INLINE_VISIBILITY long double __libcpp_copysign(long double __lcpp_x, long double __lcpp_y) _NOEXCEPT {
-#if __has_builtin(__builtin_copysignl)
-  return __builtin_copysignl(__lcpp_x, __lcpp_y);
-#else
-  return ::copysignl(__lcpp_x, __lcpp_y);
-#endif
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI long double copysign(long double __x, long double __y) _NOEXCEPT {
+  return ::__builtin_copysignl(__x, __y);
 }
 
 template <class _A1, class _A2>
-#if __has_builtin(__builtin_copysign)
-_LIBCPP_CONSTEXPR
-#endif
-inline _LIBCPP_INLINE_VISIBILITY
-typename std::_EnableIf
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI
+typename std::__enable_if_t
 <
     std::is_arithmetic<_A1>::value &&
     std::is_arithmetic<_A2>::value,
     std::__promote<_A1, _A2>
 >::type
-__libcpp_copysign(_A1 __lcpp_x, _A2 __lcpp_y) _NOEXCEPT {
-    typedef typename std::__promote<_A1, _A2>::type __result_type;
-    static_assert((!(std::_IsSame<_A1, __result_type>::value &&
-                     std::_IsSame<_A2, __result_type>::value)), "");
-#if __has_builtin(__builtin_copysign)
-    return __builtin_copysign((__result_type)__lcpp_x, (__result_type)__lcpp_y);
-#else
-    return ::copysign((__result_type)__lcpp_x, (__result_type)__lcpp_y);
-#endif
+    copysign(_A1 __x, _A2 __y) _NOEXCEPT {
+  return ::__builtin_copysign(__x, __y);
 }
 
-inline _LIBCPP_INLINE_VISIBILITY float copysign(float __lcpp_x, float __lcpp_y) _NOEXCEPT {
-  return ::__libcpp_copysign(__lcpp_x, __lcpp_y);
-}
+// erf
 
-inline _LIBCPP_INLINE_VISIBILITY long double copysign(long double __lcpp_x, long double __lcpp_y) _NOEXCEPT {
-  return ::__libcpp_copysign(__lcpp_x, __lcpp_y);
-}
+inline _LIBCPP_HIDE_FROM_ABI float       erf(float __x) _NOEXCEPT       {return __builtin_erff(__x);}
 
-template <class _A1, class _A2>
-inline _LIBCPP_INLINE_VISIBILITY
-typename std::_EnableIf
-<
-    std::is_arithmetic<_A1>::value &&
-    std::is_arithmetic<_A2>::value,
-    std::__promote<_A1, _A2>
->::type
-    copysign(_A1 __lcpp_x, _A2 __lcpp_y) _NOEXCEPT {
-  return ::__libcpp_copysign(__lcpp_x, __lcpp_y);
+template <class = int>
+_LIBCPP_HIDE_FROM_ABI double erf(double __x) _NOEXCEPT {
+  return __builtin_erf(__x);
 }
 
-// erf
-
-inline _LIBCPP_INLINE_VISIBILITY float       erf(float __lcpp_x) _NOEXCEPT       {return ::erff(__lcpp_x);}
-inline _LIBCPP_INLINE_VISIBILITY long double erf(long double __lcpp_x) _NOEXCEPT {return ::erfl(__lcpp_x);}
+inline _LIBCPP_HIDE_FROM_ABI long double erf(long double __x) _NOEXCEPT {return __builtin_erfl(__x);}
 
 template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_HIDE_FROM_ABI
 typename std::enable_if<std::is_integral<_A1>::value, double>::type
-erf(_A1 __lcpp_x) _NOEXCEPT {return ::erf((double)__lcpp_x);}
+erf(_A1 __x) _NOEXCEPT {return __builtin_erf((double)__x);}
 
 // erfc
 
-inline _LIBCPP_INLINE_VISIBILITY float       erfc(float __lcpp_x) _NOEXCEPT       {return ::erfcf(__lcpp_x);}
-inline _LIBCPP_INLINE_VISIBILITY long double erfc(long double __lcpp_x) _NOEXCEPT {return ::erfcl(__lcpp_x);}
+inline _LIBCPP_HIDE_FROM_ABI float       erfc(float __x) _NOEXCEPT       {return __builtin_erfcf(__x);}
+
+template <class = int>
+_LIBCPP_HIDE_FROM_ABI double erfc(double __x) _NOEXCEPT {
+  return __builtin_erfc(__x);
+}
+
+inline _LIBCPP_HIDE_FROM_ABI long double erfc(long double __x) _NOEXCEPT {return __builtin_erfcl(__x);}
 
 template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_HIDE_FROM_ABI
 typename std::enable_if<std::is_integral<_A1>::value, double>::type
-erfc(_A1 __lcpp_x) _NOEXCEPT {return ::erfc((double)__lcpp_x);}
+erfc(_A1 __x) _NOEXCEPT {return __builtin_erfc((double)__x);}
 
 // exp2
 
-inline _LIBCPP_INLINE_VISIBILITY float       exp2(float __lcpp_x) _NOEXCEPT       {return ::exp2f(__lcpp_x);}
-inline _LIBCPP_INLINE_VISIBILITY long double exp2(long double __lcpp_x) _NOEXCEPT {return ::exp2l(__lcpp_x);}
+inline _LIBCPP_HIDE_FROM_ABI float       exp2(float __x) _NOEXCEPT       {return __builtin_exp2f(__x);}
+
+template <class = int>
+_LIBCPP_HIDE_FROM_ABI double exp2(double __x) _NOEXCEPT {
+  return __builtin_exp2(__x);
+}
+
+inline _LIBCPP_HIDE_FROM_ABI long double exp2(long double __x) _NOEXCEPT {return __builtin_exp2l(__x);}
 
 template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_HIDE_FROM_ABI
 typename std::enable_if<std::is_integral<_A1>::value, double>::type
-exp2(_A1 __lcpp_x) _NOEXCEPT {return ::exp2((double)__lcpp_x);}
+exp2(_A1 __x) _NOEXCEPT {return __builtin_exp2((double)__x);}
 
 // expm1
 
-inline _LIBCPP_INLINE_VISIBILITY float       expm1(float __lcpp_x) _NOEXCEPT       {return ::expm1f(__lcpp_x);}
-inline _LIBCPP_INLINE_VISIBILITY long double expm1(long double __lcpp_x) _NOEXCEPT {return ::expm1l(__lcpp_x);}
+inline _LIBCPP_HIDE_FROM_ABI float       expm1(float __x) _NOEXCEPT       {return __builtin_expm1f(__x);}
+
+template <class = int>
+_LIBCPP_HIDE_FROM_ABI double expm1(double __x) _NOEXCEPT {
+  return __builtin_expm1(__x);
+}
+
+inline _LIBCPP_HIDE_FROM_ABI long double expm1(long double __x) _NOEXCEPT {return __builtin_expm1l(__x);}
 
 template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_HIDE_FROM_ABI
 typename std::enable_if<std::is_integral<_A1>::value, double>::type
-expm1(_A1 __lcpp_x) _NOEXCEPT {return ::expm1((double)__lcpp_x);}
+expm1(_A1 __x) _NOEXCEPT {return __builtin_expm1((double)__x);}
 
 // fdim
 
-inline _LIBCPP_INLINE_VISIBILITY float       fdim(float __lcpp_x, float __lcpp_y) _NOEXCEPT             {return ::fdimf(__lcpp_x, __lcpp_y);}
-inline _LIBCPP_INLINE_VISIBILITY long double fdim(long double __lcpp_x, long double __lcpp_y) _NOEXCEPT {return ::fdiml(__lcpp_x, __lcpp_y);}
+inline _LIBCPP_HIDE_FROM_ABI float       fdim(float __x, float __y) _NOEXCEPT             {return __builtin_fdimf(__x, __y);}
+
+template <class = int>
+_LIBCPP_HIDE_FROM_ABI double fdim(double __x, double __y) _NOEXCEPT {
+  return __builtin_fdim(__x, __y);
+}
+
+inline _LIBCPP_HIDE_FROM_ABI long double fdim(long double __x, long double __y) _NOEXCEPT {return __builtin_fdiml(__x, __y);}
 
 template <class _A1, class _A2>
-inline _LIBCPP_INLINE_VISIBILITY
-typename std::_EnableIf
+inline _LIBCPP_HIDE_FROM_ABI
+typename std::__enable_if_t
 <
     std::is_arithmetic<_A1>::value &&
     std::is_arithmetic<_A2>::value,
     std::__promote<_A1, _A2>
 >::type
-fdim(_A1 __lcpp_x, _A2 __lcpp_y) _NOEXCEPT
+fdim(_A1 __x, _A2 __y) _NOEXCEPT
 {
     typedef typename std::__promote<_A1, _A2>::type __result_type;
     static_assert((!(std::_IsSame<_A1, __result_type>::value &&
                      std::_IsSame<_A2, __result_type>::value)), "");
-    return ::fdim((__result_type)__lcpp_x, (__result_type)__lcpp_y);
+    return ::fdim((__result_type)__x, (__result_type)__y);
 }
 
 // fma
 
-inline _LIBCPP_INLINE_VISIBILITY float       fma(float __lcpp_x, float __lcpp_y, float __lcpp_z) _NOEXCEPT
+inline _LIBCPP_HIDE_FROM_ABI float       fma(float __x, float __y, float __z) _NOEXCEPT
 {
-#if __has_builtin(__builtin_fmaf)
-    return __builtin_fmaf(__lcpp_x, __lcpp_y, __lcpp_z);
-#else
-    return ::fmaf(__lcpp_x, __lcpp_y, __lcpp_z);
-#endif
+    return __builtin_fmaf(__x, __y, __z);
+}
+
+
+template <class = int>
+_LIBCPP_HIDE_FROM_ABI double fma(double __x, double __y, double __z) _NOEXCEPT {
+  return __builtin_fma(__x, __y, __z);
 }
-inline _LIBCPP_INLINE_VISIBILITY long double fma(long double __lcpp_x, long double __lcpp_y, long double __lcpp_z) _NOEXCEPT
+
+inline _LIBCPP_HIDE_FROM_ABI long double fma(long double __x, long double __y, long double __z) _NOEXCEPT
 {
-#if __has_builtin(__builtin_fmal)
-    return __builtin_fmal(__lcpp_x, __lcpp_y, __lcpp_z);
-#else
-    return ::fmal(__lcpp_x, __lcpp_y, __lcpp_z);
-#endif
+    return __builtin_fmal(__x, __y, __z);
 }
 
 template <class _A1, class _A2, class _A3>
-inline _LIBCPP_INLINE_VISIBILITY
-typename std::_EnableIf
+inline _LIBCPP_HIDE_FROM_ABI
+typename std::__enable_if_t
 <
     std::is_arithmetic<_A1>::value &&
     std::is_arithmetic<_A2>::value &&
     std::is_arithmetic<_A3>::value,
     std::__promote<_A1, _A2, _A3>
 >::type
-fma(_A1 __lcpp_x, _A2 __lcpp_y, _A3 __lcpp_z) _NOEXCEPT
+fma(_A1 __x, _A2 __y, _A3 __z) _NOEXCEPT
 {
     typedef typename std::__promote<_A1, _A2, _A3>::type __result_type;
     static_assert((!(std::_IsSame<_A1, __result_type>::value &&
                      std::_IsSame<_A2, __result_type>::value &&
                      std::_IsSame<_A3, __result_type>::value)), "");
-#if __has_builtin(__builtin_fma)
-    return __builtin_fma((__result_type)__lcpp_x, (__result_type)__lcpp_y, (__result_type)__lcpp_z);
-#else
-    return ::fma((__result_type)__lcpp_x, (__result_type)__lcpp_y, (__result_type)__lcpp_z);
-#endif
+    return __builtin_fma((__result_type)__x, (__result_type)__y, (__result_type)__z);
 }
 
 // fmax
 
-inline _LIBCPP_INLINE_VISIBILITY float       fmax(float __lcpp_x, float __lcpp_y) _NOEXCEPT             {return ::fmaxf(__lcpp_x, __lcpp_y);}
-inline _LIBCPP_INLINE_VISIBILITY long double fmax(long double __lcpp_x, long double __lcpp_y) _NOEXCEPT {return ::fmaxl(__lcpp_x, __lcpp_y);}
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI float       fmax(float __x, float __y) _NOEXCEPT             {return __builtin_fmaxf(__x, __y);}
+
+template <class = int>
+_LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI double fmax(double __x, double __y) _NOEXCEPT {
+  return __builtin_fmax(__x, __y);
+}
+
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI long double fmax(long double __x, long double __y) _NOEXCEPT {return __builtin_fmaxl(__x, __y);}
 
 template <class _A1, class _A2>
-inline _LIBCPP_INLINE_VISIBILITY
-typename std::_EnableIf
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI
+typename std::__enable_if_t
 <
     std::is_arithmetic<_A1>::value &&
     std::is_arithmetic<_A2>::value,
     std::__promote<_A1, _A2>
 >::type
-fmax(_A1 __lcpp_x, _A2 __lcpp_y) _NOEXCEPT
+fmax(_A1 __x, _A2 __y) _NOEXCEPT
 {
     typedef typename std::__promote<_A1, _A2>::type __result_type;
     static_assert((!(std::_IsSame<_A1, __result_type>::value &&
                      std::_IsSame<_A2, __result_type>::value)), "");
-    return ::fmax((__result_type)__lcpp_x, (__result_type)__lcpp_y);
+    return ::fmax((__result_type)__x, (__result_type)__y);
 }
 
 // fmin
 
-inline _LIBCPP_INLINE_VISIBILITY float       fmin(float __lcpp_x, float __lcpp_y) _NOEXCEPT             {return ::fminf(__lcpp_x, __lcpp_y);}
-inline _LIBCPP_INLINE_VISIBILITY long double fmin(long double __lcpp_x, long double __lcpp_y) _NOEXCEPT {return ::fminl(__lcpp_x, __lcpp_y);}
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI float       fmin(float __x, float __y) _NOEXCEPT             {return __builtin_fminf(__x, __y);}
+
+template <class = int>
+_LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI double fmin(double __x, double __y) _NOEXCEPT {
+  return __builtin_fmin(__x, __y);
+}
+
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI long double fmin(long double __x, long double __y) _NOEXCEPT {return __builtin_fminl(__x, __y);}
 
 template <class _A1, class _A2>
-inline _LIBCPP_INLINE_VISIBILITY
-typename std::_EnableIf
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI
+typename std::__enable_if_t
 <
     std::is_arithmetic<_A1>::value &&
     std::is_arithmetic<_A2>::value,
     std::__promote<_A1, _A2>
 >::type
-fmin(_A1 __lcpp_x, _A2 __lcpp_y) _NOEXCEPT
+fmin(_A1 __x, _A2 __y) _NOEXCEPT
 {
     typedef typename std::__promote<_A1, _A2>::type __result_type;
     static_assert((!(std::_IsSame<_A1, __result_type>::value &&
                      std::_IsSame<_A2, __result_type>::value)), "");
-    return ::fmin((__result_type)__lcpp_x, (__result_type)__lcpp_y);
+    return ::fmin((__result_type)__x, (__result_type)__y);
 }
 
 // hypot
 
-inline _LIBCPP_INLINE_VISIBILITY float       hypot(float __lcpp_x, float __lcpp_y) _NOEXCEPT             {return ::hypotf(__lcpp_x, __lcpp_y);}
-inline _LIBCPP_INLINE_VISIBILITY long double hypot(long double __lcpp_x, long double __lcpp_y) _NOEXCEPT {return ::hypotl(__lcpp_x, __lcpp_y);}
+inline _LIBCPP_HIDE_FROM_ABI float       hypot(float __x, float __y) _NOEXCEPT             {return __builtin_hypotf(__x, __y);}
+
+template <class = int>
+_LIBCPP_HIDE_FROM_ABI double hypot(double __x, double __y) _NOEXCEPT {
+  return __builtin_hypot(__x, __y);
+}
+
+inline _LIBCPP_HIDE_FROM_ABI long double hypot(long double __x, long double __y) _NOEXCEPT {return __builtin_hypotl(__x, __y);}
 
 template <class _A1, class _A2>
-inline _LIBCPP_INLINE_VISIBILITY
-typename std::_EnableIf
+inline _LIBCPP_HIDE_FROM_ABI
+typename std::__enable_if_t
 <
     std::is_arithmetic<_A1>::value &&
     std::is_arithmetic<_A2>::value,
     std::__promote<_A1, _A2>
 >::type
-hypot(_A1 __lcpp_x, _A2 __lcpp_y) _NOEXCEPT
+hypot(_A1 __x, _A2 __y) _NOEXCEPT
 {
     typedef typename std::__promote<_A1, _A2>::type __result_type;
     static_assert((!(std::_IsSame<_A1, __result_type>::value &&
                      std::_IsSame<_A2, __result_type>::value)), "");
-    return ::hypot((__result_type)__lcpp_x, (__result_type)__lcpp_y);
+    return ::hypot((__result_type)__x, (__result_type)__y);
 }
 
 // ilogb
 
-inline _LIBCPP_INLINE_VISIBILITY int ilogb(float __lcpp_x) _NOEXCEPT       {return ::ilogbf(__lcpp_x);}
-inline _LIBCPP_INLINE_VISIBILITY int ilogb(long double __lcpp_x) _NOEXCEPT {return ::ilogbl(__lcpp_x);}
+inline _LIBCPP_HIDE_FROM_ABI int ilogb(float __x) _NOEXCEPT       {return __builtin_ilogbf(__x);}
+
+template <class = int>
+_LIBCPP_HIDE_FROM_ABI double ilogb(double __x) _NOEXCEPT {
+  return __builtin_ilogb(__x);
+}
+
+inline _LIBCPP_HIDE_FROM_ABI int ilogb(long double __x) _NOEXCEPT {return __builtin_ilogbl(__x);}
 
 template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_HIDE_FROM_ABI
 typename std::enable_if<std::is_integral<_A1>::value, int>::type
-ilogb(_A1 __lcpp_x) _NOEXCEPT {return ::ilogb((double)__lcpp_x);}
+ilogb(_A1 __x) _NOEXCEPT {return __builtin_ilogb((double)__x);}
 
 // lgamma
 
-inline _LIBCPP_INLINE_VISIBILITY float       lgamma(float __lcpp_x) _NOEXCEPT       {return ::lgammaf(__lcpp_x);}
-inline _LIBCPP_INLINE_VISIBILITY long double lgamma(long double __lcpp_x) _NOEXCEPT {return ::lgammal(__lcpp_x);}
+inline _LIBCPP_HIDE_FROM_ABI float       lgamma(float __x) _NOEXCEPT       {return __builtin_lgammaf(__x);}
+
+template <class = int>
+_LIBCPP_HIDE_FROM_ABI double lgamma(double __x) _NOEXCEPT {
+  return __builtin_lgamma(__x);
+}
+
+inline _LIBCPP_HIDE_FROM_ABI long double lgamma(long double __x) _NOEXCEPT {return __builtin_lgammal(__x);}
 
 template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_HIDE_FROM_ABI
 typename std::enable_if<std::is_integral<_A1>::value, double>::type
-lgamma(_A1 __lcpp_x) _NOEXCEPT {return ::lgamma((double)__lcpp_x);}
+lgamma(_A1 __x) _NOEXCEPT {return __builtin_lgamma((double)__x);}
 
 // llrint
 
-inline _LIBCPP_INLINE_VISIBILITY long long llrint(float __lcpp_x) _NOEXCEPT
+inline _LIBCPP_HIDE_FROM_ABI long long llrint(float __x) _NOEXCEPT
 {
-#if __has_builtin(__builtin_llrintf)
-    return __builtin_llrintf(__lcpp_x);
-#else
-    return ::llrintf(__lcpp_x);
-#endif
+    return __builtin_llrintf(__x);
+}
+
+template <class = int>
+_LIBCPP_HIDE_FROM_ABI long long llrint(double __x) _NOEXCEPT {
+  return __builtin_llrint(__x);
 }
-inline _LIBCPP_INLINE_VISIBILITY long long llrint(long double __lcpp_x) _NOEXCEPT
+
+inline _LIBCPP_HIDE_FROM_ABI long long llrint(long double __x) _NOEXCEPT
 {
-#if __has_builtin(__builtin_llrintl)
-    return __builtin_llrintl(__lcpp_x);
-#else
-    return ::llrintl(__lcpp_x);
-#endif
+    return __builtin_llrintl(__x);
 }
 
 template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_HIDE_FROM_ABI
 typename std::enable_if<std::is_integral<_A1>::value, long long>::type
-llrint(_A1 __lcpp_x) _NOEXCEPT
+llrint(_A1 __x) _NOEXCEPT
 {
-#if __has_builtin(__builtin_llrint)
-    return __builtin_llrint((double)__lcpp_x);
-#else
-    return ::llrint((double)__lcpp_x);
-#endif
+    return __builtin_llrint((double)__x);
 }
 
 // llround
 
-inline _LIBCPP_INLINE_VISIBILITY long long llround(float __lcpp_x) _NOEXCEPT
+inline _LIBCPP_HIDE_FROM_ABI long long llround(float __x) _NOEXCEPT
 {
-#if __has_builtin(__builtin_llroundf)
-    return __builtin_llroundf(__lcpp_x);
-#else
-    return ::llroundf(__lcpp_x);
-#endif
+    return __builtin_llroundf(__x);
+}
+
+template <class = int>
+_LIBCPP_HIDE_FROM_ABI long long llround(double __x) _NOEXCEPT {
+  return __builtin_llround(__x);
 }
-inline _LIBCPP_INLINE_VISIBILITY long long llround(long double __lcpp_x) _NOEXCEPT
+
+inline _LIBCPP_HIDE_FROM_ABI long long llround(long double __x) _NOEXCEPT
 {
-#if __has_builtin(__builtin_llroundl)
-    return __builtin_llroundl(__lcpp_x);
-#else
-    return ::llroundl(__lcpp_x);
-#endif
+    return __builtin_llroundl(__x);
 }
 
 template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_HIDE_FROM_ABI
 typename std::enable_if<std::is_integral<_A1>::value, long long>::type
-llround(_A1 __lcpp_x) _NOEXCEPT
+llround(_A1 __x) _NOEXCEPT
 {
-#if __has_builtin(__builtin_llround)
-    return __builtin_llround((double)__lcpp_x);
-#else
-    return ::llround((double)__lcpp_x);
-#endif
+    return __builtin_llround((double)__x);
 }
 
 // log1p
 
-inline _LIBCPP_INLINE_VISIBILITY float       log1p(float __lcpp_x) _NOEXCEPT       {return ::log1pf(__lcpp_x);}
-inline _LIBCPP_INLINE_VISIBILITY long double log1p(long double __lcpp_x) _NOEXCEPT {return ::log1pl(__lcpp_x);}
+inline _LIBCPP_HIDE_FROM_ABI float       log1p(float __x) _NOEXCEPT       {return __builtin_log1pf(__x);}
+
+template <class = int>
+_LIBCPP_HIDE_FROM_ABI double log1p(double __x) _NOEXCEPT {
+  return __builtin_log1p(__x);
+}
+
+inline _LIBCPP_HIDE_FROM_ABI long double log1p(long double __x) _NOEXCEPT {return __builtin_log1pl(__x);}
 
 template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_HIDE_FROM_ABI
 typename std::enable_if<std::is_integral<_A1>::value, double>::type
-log1p(_A1 __lcpp_x) _NOEXCEPT {return ::log1p((double)__lcpp_x);}
+log1p(_A1 __x) _NOEXCEPT {return __builtin_log1p((double)__x);}
 
 // log2
 
-inline _LIBCPP_INLINE_VISIBILITY float       log2(float __lcpp_x) _NOEXCEPT       {return ::log2f(__lcpp_x);}
-inline _LIBCPP_INLINE_VISIBILITY long double log2(long double __lcpp_x) _NOEXCEPT {return ::log2l(__lcpp_x);}
+inline _LIBCPP_HIDE_FROM_ABI float       log2(float __x) _NOEXCEPT       {return __builtin_log2f(__x);}
+
+template <class = int>
+_LIBCPP_HIDE_FROM_ABI double log2(double __x) _NOEXCEPT {
+  return __builtin_log2(__x);
+}
+
+inline _LIBCPP_HIDE_FROM_ABI long double log2(long double __x) _NOEXCEPT {return __builtin_log2l(__x);}
 
 template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_HIDE_FROM_ABI
 typename std::enable_if<std::is_integral<_A1>::value, double>::type
-log2(_A1 __lcpp_x) _NOEXCEPT {return ::log2((double)__lcpp_x);}
+log2(_A1 __x) _NOEXCEPT {return __builtin_log2((double)__x);}
 
 // logb
 
-inline _LIBCPP_INLINE_VISIBILITY float       logb(float __lcpp_x) _NOEXCEPT       {return ::logbf(__lcpp_x);}
-inline _LIBCPP_INLINE_VISIBILITY long double logb(long double __lcpp_x) _NOEXCEPT {return ::logbl(__lcpp_x);}
+inline _LIBCPP_HIDE_FROM_ABI float       logb(float __x) _NOEXCEPT       {return __builtin_logbf(__x);}
+
+template <class = int>
+_LIBCPP_HIDE_FROM_ABI double logb(double __x) _NOEXCEPT {
+  return __builtin_logb(__x);
+}
+
+inline _LIBCPP_HIDE_FROM_ABI long double logb(long double __x) _NOEXCEPT {return __builtin_logbl(__x);}
 
 template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_HIDE_FROM_ABI
 typename std::enable_if<std::is_integral<_A1>::value, double>::type
-logb(_A1 __lcpp_x) _NOEXCEPT {return ::logb((double)__lcpp_x);}
+logb(_A1 __x) _NOEXCEPT {return __builtin_logb((double)__x);}
 
 // lrint
 
-inline _LIBCPP_INLINE_VISIBILITY long lrint(float __lcpp_x) _NOEXCEPT
+inline _LIBCPP_HIDE_FROM_ABI long lrint(float __x) _NOEXCEPT
 {
-#if __has_builtin(__builtin_lrintf)
-    return __builtin_lrintf(__lcpp_x);
-#else
-    return ::lrintf(__lcpp_x);
-#endif
+    return __builtin_lrintf(__x);
+}
+
+template <class = int>
+_LIBCPP_HIDE_FROM_ABI long lrint(double __x) _NOEXCEPT {
+  return __builtin_lrint(__x);
 }
-inline _LIBCPP_INLINE_VISIBILITY long lrint(long double __lcpp_x) _NOEXCEPT
+
+inline _LIBCPP_HIDE_FROM_ABI long lrint(long double __x) _NOEXCEPT
 {
-#if __has_builtin(__builtin_lrintl)
-    return __builtin_lrintl(__lcpp_x);
-#else
-    return ::lrintl(__lcpp_x);
-#endif
+    return __builtin_lrintl(__x);
 }
 
 template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_HIDE_FROM_ABI
 typename std::enable_if<std::is_integral<_A1>::value, long>::type
-lrint(_A1 __lcpp_x) _NOEXCEPT
+lrint(_A1 __x) _NOEXCEPT
 {
-#if __has_builtin(__builtin_lrint)
-    return __builtin_lrint((double)__lcpp_x);
-#else
-    return ::lrint((double)__lcpp_x);
-#endif
+    return __builtin_lrint((double)__x);
 }
 
 // lround
 
-inline _LIBCPP_INLINE_VISIBILITY long lround(float __lcpp_x) _NOEXCEPT
+inline _LIBCPP_HIDE_FROM_ABI long lround(float __x) _NOEXCEPT
 {
-#if __has_builtin(__builtin_lroundf)
-    return __builtin_lroundf(__lcpp_x);
-#else
-    return ::lroundf(__lcpp_x);
-#endif
+    return __builtin_lroundf(__x);
+}
+
+template <class = int>
+_LIBCPP_HIDE_FROM_ABI long lround(double __x) _NOEXCEPT {
+  return __builtin_lround(__x);
 }
-inline _LIBCPP_INLINE_VISIBILITY long lround(long double __lcpp_x) _NOEXCEPT
+
+inline _LIBCPP_HIDE_FROM_ABI long lround(long double __x) _NOEXCEPT
 {
-#if __has_builtin(__builtin_lroundl)
-    return __builtin_lroundl(__lcpp_x);
-#else
-    return ::lroundl(__lcpp_x);
-#endif
+    return __builtin_lroundl(__x);
 }
 
 template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_HIDE_FROM_ABI
 typename std::enable_if<std::is_integral<_A1>::value, long>::type
-lround(_A1 __lcpp_x) _NOEXCEPT
+lround(_A1 __x) _NOEXCEPT
 {
-#if __has_builtin(__builtin_lround)
-    return __builtin_lround((double)__lcpp_x);
-#else
-    return ::lround((double)__lcpp_x);
-#endif
+    return __builtin_lround((double)__x);
 }
 
 // nan
 
 // nearbyint
 
-inline _LIBCPP_INLINE_VISIBILITY float       nearbyint(float __lcpp_x) _NOEXCEPT       {return ::nearbyintf(__lcpp_x);}
-inline _LIBCPP_INLINE_VISIBILITY long double nearbyint(long double __lcpp_x) _NOEXCEPT {return ::nearbyintl(__lcpp_x);}
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI float       nearbyint(float __x) _NOEXCEPT       {return __builtin_nearbyintf(__x);}
+
+template <class = int>
+_LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI double nearbyint(double __x) _NOEXCEPT {
+  return __builtin_nearbyint(__x);
+}
+
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI long double nearbyint(long double __x) _NOEXCEPT {return __builtin_nearbyintl(__x);}
 
 template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI
 typename std::enable_if<std::is_integral<_A1>::value, double>::type
-nearbyint(_A1 __lcpp_x) _NOEXCEPT {return ::nearbyint((double)__lcpp_x);}
+nearbyint(_A1 __x) _NOEXCEPT {return __builtin_nearbyint((double)__x);}
 
 // nextafter
 
-inline _LIBCPP_INLINE_VISIBILITY float       nextafter(float __lcpp_x, float __lcpp_y) _NOEXCEPT             {return ::nextafterf(__lcpp_x, __lcpp_y);}
-inline _LIBCPP_INLINE_VISIBILITY long double nextafter(long double __lcpp_x, long double __lcpp_y) _NOEXCEPT {return ::nextafterl(__lcpp_x, __lcpp_y);}
+inline _LIBCPP_HIDE_FROM_ABI float       nextafter(float __x, float __y) _NOEXCEPT             {return __builtin_nextafterf(__x, __y);}
+
+template <class = int>
+_LIBCPP_HIDE_FROM_ABI double nextafter(double __x, double __y) _NOEXCEPT {
+  return __builtin_nextafter(__x, __y);
+}
+
+inline _LIBCPP_HIDE_FROM_ABI long double nextafter(long double __x, long double __y) _NOEXCEPT {return __builtin_nextafterl(__x, __y);}
 
 template <class _A1, class _A2>
-inline _LIBCPP_INLINE_VISIBILITY
-typename std::_EnableIf
+inline _LIBCPP_HIDE_FROM_ABI
+typename std::__enable_if_t
 <
     std::is_arithmetic<_A1>::value &&
     std::is_arithmetic<_A2>::value,
     std::__promote<_A1, _A2>
 >::type
-nextafter(_A1 __lcpp_x, _A2 __lcpp_y) _NOEXCEPT
+nextafter(_A1 __x, _A2 __y) _NOEXCEPT
 {
     typedef typename std::__promote<_A1, _A2>::type __result_type;
     static_assert((!(std::_IsSame<_A1, __result_type>::value &&
                      std::_IsSame<_A2, __result_type>::value)), "");
-    return ::nextafter((__result_type)__lcpp_x, (__result_type)__lcpp_y);
+    return ::nextafter((__result_type)__x, (__result_type)__y);
 }
 
 // nexttoward
 
-inline _LIBCPP_INLINE_VISIBILITY float       nexttoward(float __lcpp_x, long double __lcpp_y) _NOEXCEPT       {return ::nexttowardf(__lcpp_x, __lcpp_y);}
-inline _LIBCPP_INLINE_VISIBILITY long double nexttoward(long double __lcpp_x, long double __lcpp_y) _NOEXCEPT {return ::nexttowardl(__lcpp_x, __lcpp_y);}
+inline _LIBCPP_HIDE_FROM_ABI float       nexttoward(float __x, long double __y) _NOEXCEPT       {return __builtin_nexttowardf(__x, __y);}
+
+template <class = int>
+_LIBCPP_HIDE_FROM_ABI double nexttoward(double __x, long double __y) _NOEXCEPT {
+  return __builtin_nexttoward(__x, __y);
+}
+
+inline _LIBCPP_HIDE_FROM_ABI long double nexttoward(long double __x, long double __y) _NOEXCEPT {return __builtin_nexttowardl(__x, __y);}
 
 template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_HIDE_FROM_ABI
 typename std::enable_if<std::is_integral<_A1>::value, double>::type
-nexttoward(_A1 __lcpp_x, long double __lcpp_y) _NOEXCEPT {return ::nexttoward((double)__lcpp_x, __lcpp_y);}
+nexttoward(_A1 __x, long double __y) _NOEXCEPT {return __builtin_nexttoward((double)__x, __y);}
 
 // remainder
 
-inline _LIBCPP_INLINE_VISIBILITY float       remainder(float __lcpp_x, float __lcpp_y) _NOEXCEPT             {return ::remainderf(__lcpp_x, __lcpp_y);}
-inline _LIBCPP_INLINE_VISIBILITY long double remainder(long double __lcpp_x, long double __lcpp_y) _NOEXCEPT {return ::remainderl(__lcpp_x, __lcpp_y);}
+inline _LIBCPP_HIDE_FROM_ABI float       remainder(float __x, float __y) _NOEXCEPT             {return __builtin_remainderf(__x, __y);}
+
+template <class = int>
+_LIBCPP_HIDE_FROM_ABI double remainder(double __x, double __y) _NOEXCEPT {
+  return __builtin_remainder(__x, __y);
+}
+
+inline _LIBCPP_HIDE_FROM_ABI long double remainder(long double __x, long double __y) _NOEXCEPT {return __builtin_remainderl(__x, __y);}
 
 template <class _A1, class _A2>
-inline _LIBCPP_INLINE_VISIBILITY
-typename std::_EnableIf
+inline _LIBCPP_HIDE_FROM_ABI
+typename std::__enable_if_t
 <
     std::is_arithmetic<_A1>::value &&
     std::is_arithmetic<_A2>::value,
     std::__promote<_A1, _A2>
 >::type
-remainder(_A1 __lcpp_x, _A2 __lcpp_y) _NOEXCEPT
+remainder(_A1 __x, _A2 __y) _NOEXCEPT
 {
     typedef typename std::__promote<_A1, _A2>::type __result_type;
     static_assert((!(std::_IsSame<_A1, __result_type>::value &&
                      std::_IsSame<_A2, __result_type>::value)), "");
-    return ::remainder((__result_type)__lcpp_x, (__result_type)__lcpp_y);
+    return ::remainder((__result_type)__x, (__result_type)__y);
 }
 
 // remquo
 
-inline _LIBCPP_INLINE_VISIBILITY float       remquo(float __lcpp_x, float __lcpp_y, int* __lcpp_z) _NOEXCEPT             {return ::remquof(__lcpp_x, __lcpp_y, __lcpp_z);}
-inline _LIBCPP_INLINE_VISIBILITY long double remquo(long double __lcpp_x, long double __lcpp_y, int* __lcpp_z) _NOEXCEPT {return ::remquol(__lcpp_x, __lcpp_y, __lcpp_z);}
+inline _LIBCPP_HIDE_FROM_ABI float       remquo(float __x, float __y, int* __z) _NOEXCEPT             {return __builtin_remquof(__x, __y, __z);}
+
+template <class = int>
+_LIBCPP_HIDE_FROM_ABI double remquo(double __x, double __y, int* __z) _NOEXCEPT {
+  return __builtin_remquo(__x, __y, __z);
+}
+
+inline _LIBCPP_HIDE_FROM_ABI long double remquo(long double __x, long double __y, int* __z) _NOEXCEPT {return __builtin_remquol(__x, __y, __z);}
 
 template <class _A1, class _A2>
-inline _LIBCPP_INLINE_VISIBILITY
-typename std::_EnableIf
+inline _LIBCPP_HIDE_FROM_ABI
+typename std::__enable_if_t
 <
     std::is_arithmetic<_A1>::value &&
     std::is_arithmetic<_A2>::value,
     std::__promote<_A1, _A2>
 >::type
-remquo(_A1 __lcpp_x, _A2 __lcpp_y, int* __lcpp_z) _NOEXCEPT
+remquo(_A1 __x, _A2 __y, int* __z) _NOEXCEPT
 {
     typedef typename std::__promote<_A1, _A2>::type __result_type;
     static_assert((!(std::_IsSame<_A1, __result_type>::value &&
                      std::_IsSame<_A2, __result_type>::value)), "");
-    return ::remquo((__result_type)__lcpp_x, (__result_type)__lcpp_y, __lcpp_z);
+    return ::remquo((__result_type)__x, (__result_type)__y, __z);
 }
 
 // rint
 
-inline _LIBCPP_INLINE_VISIBILITY float       rint(float __lcpp_x) _NOEXCEPT
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI float       rint(float __x) _NOEXCEPT
 {
-#if __has_builtin(__builtin_rintf)
-    return __builtin_rintf(__lcpp_x);
-#else
-    return ::rintf(__lcpp_x);
-#endif
+    return __builtin_rintf(__x);
+}
+
+template <class = int>
+_LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI double rint(double __x) _NOEXCEPT {
+  return __builtin_rint(__x);
 }
-inline _LIBCPP_INLINE_VISIBILITY long double rint(long double __lcpp_x) _NOEXCEPT
+
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI long double rint(long double __x) _NOEXCEPT
 {
-#if __has_builtin(__builtin_rintl)
-    return __builtin_rintl(__lcpp_x);
-#else
-    return ::rintl(__lcpp_x);
-#endif
+    return __builtin_rintl(__x);
 }
 
 template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI
 typename std::enable_if<std::is_integral<_A1>::value, double>::type
-rint(_A1 __lcpp_x) _NOEXCEPT
+rint(_A1 __x) _NOEXCEPT
 {
-#if __has_builtin(__builtin_rint)
-    return __builtin_rint((double)__lcpp_x);
-#else
-    return ::rint((double)__lcpp_x);
-#endif
+    return __builtin_rint((double)__x);
 }
 
 // round
 
-inline _LIBCPP_INLINE_VISIBILITY float       round(float __lcpp_x) _NOEXCEPT
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI float       round(float __x) _NOEXCEPT
 {
-#if __has_builtin(__builtin_round)
-    return __builtin_round(__lcpp_x);
-#else
-    return ::round(__lcpp_x);
-#endif
+    return __builtin_round(__x);
+}
+
+template <class = int>
+_LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI double round(double __x) _NOEXCEPT {
+  return __builtin_round(__x);
 }
-inline _LIBCPP_INLINE_VISIBILITY long double round(long double __lcpp_x) _NOEXCEPT
+
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI long double round(long double __x) _NOEXCEPT
 {
-#if __has_builtin(__builtin_roundl)
-    return __builtin_roundl(__lcpp_x);
-#else
-    return ::roundl(__lcpp_x);
-#endif
+    return __builtin_roundl(__x);
 }
 
 template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI
 typename std::enable_if<std::is_integral<_A1>::value, double>::type
-round(_A1 __lcpp_x) _NOEXCEPT
+round(_A1 __x) _NOEXCEPT
 {
-#if __has_builtin(__builtin_round)
-    return __builtin_round((double)__lcpp_x);
-#else
-    return ::round((double)__lcpp_x);
-#endif
+    return __builtin_round((double)__x);
 }
 
 // scalbln
 
-inline _LIBCPP_INLINE_VISIBILITY float       scalbln(float __lcpp_x, long __lcpp_y) _NOEXCEPT       {return ::scalblnf(__lcpp_x, __lcpp_y);}
-inline _LIBCPP_INLINE_VISIBILITY long double scalbln(long double __lcpp_x, long __lcpp_y) _NOEXCEPT {return ::scalblnl(__lcpp_x, __lcpp_y);}
+inline _LIBCPP_HIDE_FROM_ABI float       scalbln(float __x, long __y) _NOEXCEPT       {return __builtin_scalblnf(__x, __y);}
+
+template <class = int>
+_LIBCPP_HIDE_FROM_ABI double scalbln(double __x, long __y) _NOEXCEPT {
+  return __builtin_scalbln(__x, __y);
+}
+
+inline _LIBCPP_HIDE_FROM_ABI long double scalbln(long double __x, long __y) _NOEXCEPT {return __builtin_scalblnl(__x, __y);}
 
 template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_HIDE_FROM_ABI
 typename std::enable_if<std::is_integral<_A1>::value, double>::type
-scalbln(_A1 __lcpp_x, long __lcpp_y) _NOEXCEPT {return ::scalbln((double)__lcpp_x, __lcpp_y);}
+scalbln(_A1 __x, long __y) _NOEXCEPT {return __builtin_scalbln((double)__x, __y);}
 
 // scalbn
 
-inline _LIBCPP_INLINE_VISIBILITY float       scalbn(float __lcpp_x, int __lcpp_y) _NOEXCEPT       {return ::scalbnf(__lcpp_x, __lcpp_y);}
-inline _LIBCPP_INLINE_VISIBILITY long double scalbn(long double __lcpp_x, int __lcpp_y) _NOEXCEPT {return ::scalbnl(__lcpp_x, __lcpp_y);}
+inline _LIBCPP_HIDE_FROM_ABI float       scalbn(float __x, int __y) _NOEXCEPT       {return __builtin_scalbnf(__x, __y);}
+
+template <class = int>
+_LIBCPP_HIDE_FROM_ABI double scalbn(double __x, int __y) _NOEXCEPT {
+  return __builtin_scalbn(__x, __y);
+}
+
+inline _LIBCPP_HIDE_FROM_ABI long double scalbn(long double __x, int __y) _NOEXCEPT {return __builtin_scalbnl(__x, __y);}
 
 template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_HIDE_FROM_ABI
 typename std::enable_if<std::is_integral<_A1>::value, double>::type
-scalbn(_A1 __lcpp_x, int __lcpp_y) _NOEXCEPT {return ::scalbn((double)__lcpp_x, __lcpp_y);}
+scalbn(_A1 __x, int __y) _NOEXCEPT {return __builtin_scalbn((double)__x, __y);}
 
 // tgamma
 
-inline _LIBCPP_INLINE_VISIBILITY float       tgamma(float __lcpp_x) _NOEXCEPT       {return ::tgammaf(__lcpp_x);}
-inline _LIBCPP_INLINE_VISIBILITY long double tgamma(long double __lcpp_x) _NOEXCEPT {return ::tgammal(__lcpp_x);}
+inline _LIBCPP_HIDE_FROM_ABI float       tgamma(float __x) _NOEXCEPT       {return __builtin_tgammaf(__x);}
+
+template <class = int>
+_LIBCPP_HIDE_FROM_ABI double tgamma(double __x) _NOEXCEPT {
+  return __builtin_tgamma(__x);
+}
+
+inline _LIBCPP_HIDE_FROM_ABI long double tgamma(long double __x) _NOEXCEPT {return __builtin_tgammal(__x);}
 
 template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
+inline _LIBCPP_HIDE_FROM_ABI
 typename std::enable_if<std::is_integral<_A1>::value, double>::type
-tgamma(_A1 __lcpp_x) _NOEXCEPT {return ::tgamma((double)__lcpp_x);}
+tgamma(_A1 __x) _NOEXCEPT {return __builtin_tgamma((double)__x);}
 
 // trunc
 
-inline _LIBCPP_INLINE_VISIBILITY float       trunc(float __lcpp_x) _NOEXCEPT
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI float       trunc(float __x) _NOEXCEPT
 {
-#if __has_builtin(__builtin_trunc)
-    return __builtin_trunc(__lcpp_x);
-#else
-    return ::trunc(__lcpp_x);
-#endif
+    return __builtin_trunc(__x);
+}
+
+template <class = int>
+_LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI double trunc(double __x) _NOEXCEPT {
+  return __builtin_trunc(__x);
 }
-inline _LIBCPP_INLINE_VISIBILITY long double trunc(long double __lcpp_x) _NOEXCEPT
+
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI long double trunc(long double __x) _NOEXCEPT
 {
-#if __has_builtin(__builtin_truncl)
-    return __builtin_truncl(__lcpp_x);
-#else
-    return ::truncl(__lcpp_x);
-#endif
+    return __builtin_truncl(__x);
 }
 
 template <class _A1>
-inline _LIBCPP_INLINE_VISIBILITY
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_HIDE_FROM_ABI
 typename std::enable_if<std::is_integral<_A1>::value, double>::type
-trunc(_A1 __lcpp_x) _NOEXCEPT
+trunc(_A1 __x) _NOEXCEPT
 {
-#if __has_builtin(__builtin_trunc)
-    return __builtin_trunc((double)__lcpp_x);
-#else
-    return ::trunc((double)__lcpp_x);
-#endif
+    return __builtin_trunc((double)__x);
 }
 
 } // extern "C++"
diff --git a/gnu/llvm/libcxx/include/module.modulemap b/gnu/llvm/libcxx/include/module.modulemap
deleted file mode 100644
index d02a2b2852e..00000000000
--- a/gnu/llvm/libcxx/include/module.modulemap
+++ /dev/null
@@ -1,900 +0,0 @@
-// define the module for __config outside of the top level 'std' module
-// since __config may be included from C headers which may create an
-// include cycle.
-module std_config [system] [extern_c] {
-    header "__config"
-}
-
-module std [system] {
-  export std_config
-  // FIXME: The standard does not require that each of these submodules
-  // re-exports its imported modules. We should provide an alternative form of
-  // export that issues a warning if a name from the submodule is used, and
-  // use that to provide a 'strict mode' for libc++.
-
-  // Deprecated C-compatibility headers. These can all be included from within
-  // an 'extern "C"' context.
-  module depr [extern_c] {
-    // <assert.h> provided by C library.
-    module ctype_h {
-      header "ctype.h"
-      export *
-    }
-    module errno_h {
-      header "errno.h"
-      export *
-    }
-    module fenv_h {
-      header "fenv.h"
-      export *
-    }
-    // <float.h> provided by compiler or C library.
-    module inttypes_h {
-      header "inttypes.h"
-      export stdint_h
-      export *
-    }
-    // <iso646.h> provided by compiler.
-    // <limits.h> provided by compiler or C library.
-    module locale_h {
-      header "locale.h"
-      export *
-    }
-    module math_h {
-      header "math.h"
-      export *
-    }
-    module setjmp_h {
-      header "setjmp.h"
-      export *
-    }
-    // FIXME: <stdalign.h> is missing.
-    // <signal.h> provided by C library.
-    // <stdarg.h> provided by compiler.
-    // <stdbool.h> provided by compiler.
-    module stddef_h {
-      // <stddef.h>'s __need_* macros require textual inclusion.
-      textual header "stddef.h"
-    }
-    module stdint_h {
-      header "stdint.h"
-      export *
-      // FIXME: This module only exists on OS X and for some reason the
-      // wildcard above doesn't export it.
-      export Darwin.C.stdint
-    }
-    module stdio_h {
-      // <stdio.h>'s __need_* macros require textual inclusion.
-      textual header "stdio.h"
-      export *
-      export Darwin.C.stdio
-    }
-    module stdlib_h {
-      // <stdlib.h>'s __need_* macros require textual inclusion.
-      textual header "stdlib.h"
-      export *
-    }
-    module string_h {
-      header "string.h"
-      export *
-    }
-    // FIXME: <uchar.h> is missing.
-    // <time.h> provided by C library.
-    module wchar_h {
-      // <wchar.h>'s __need_* macros require textual inclusion.
-      textual header "wchar.h"
-      export *
-    }
-    module wctype_h {
-      header "wctype.h"
-      export *
-    }
-  }
-
-  // <complex.h> and <tgmath.h> are not C headers in any real sense, do not
-  // allow their use in extern "C" contexts.
-  module complex_h {
-    header "complex.h"
-    export ccomplex
-    export *
-  }
-  module tgmath_h {
-    header "tgmath.h"
-    export ccomplex
-    export cmath
-    export *
-  }
-
-  // C compatibility headers.
-  module compat {
-    module cassert {
-      // <cassert>'s use of NDEBUG requires textual inclusion.
-      textual header "cassert"
-    }
-    module ccomplex {
-      header "ccomplex"
-      export complex
-      export *
-    }
-    module cctype {
-      header "cctype"
-      export *
-    }
-    module cerrno {
-      header "cerrno"
-      export *
-    }
-    module cfenv {
-      header "cfenv"
-      export *
-    }
-    module cfloat {
-      header "cfloat"
-      export *
-    }
-    module cinttypes {
-      header "cinttypes"
-      export cstdint
-      export *
-    }
-    module ciso646 {
-      header "ciso646"
-      export *
-    }
-    module climits {
-      header "climits"
-      export *
-    }
-    module clocale {
-      header "clocale"
-      export *
-    }
-    module cmath {
-      header "cmath"
-      export *
-    }
-    module csetjmp {
-      header "csetjmp"
-      export *
-    }
-    module csignal {
-      header "csignal"
-      export *
-    }
-    // FIXME: <cstdalign> is missing.
-    module cstdarg {
-      header "cstdarg"
-      export *
-    }
-    module cstdbool {
-      header "cstdbool"
-      export *
-    }
-    module cstddef {
-      header "cstddef"
-      export *
-    }
-    module cstdint {
-      header "cstdint"
-      export depr.stdint_h
-      export *
-    }
-    module cstdio {
-      header "cstdio"
-      export *
-    }
-    module cstdlib {
-      header "cstdlib"
-      export *
-    }
-    module cstring {
-      header "cstring"
-      export *
-    }
-    module ctgmath {
-      header "ctgmath"
-      export ccomplex
-      export cmath
-      export *
-    }
-    module ctime {
-      header "ctime"
-      export *
-    }
-    // FIXME: <cuchar> is missing.
-    module cwchar {
-      header "cwchar"
-      export depr.stdio_h
-      export *
-    }
-    module cwctype {
-      header "cwctype"
-      export *
-    }
-  }
-
-  module algorithm {
-    header "algorithm"
-    export initializer_list
-    export *
-
-    module __algorithm {
-      module adjacent_find            { private header "__algorithm/adjacent_find.h" }
-      module all_of                   { private header "__algorithm/all_of.h" }
-      module any_of                   { private header "__algorithm/any_of.h" }
-      module binary_search            { private header "__algorithm/binary_search.h" }
-      module clamp                    { private header "__algorithm/clamp.h" }
-      module comp                     { private header "__algorithm/comp.h" }
-      module comp_ref_type            { private header "__algorithm/comp_ref_type.h" }
-      module copy                     { private header "__algorithm/copy.h" }
-      module copy_backward            { private header "__algorithm/copy_backward.h" }
-      module copy_if                  { private header "__algorithm/copy_if.h" }
-      module copy_n                   { private header "__algorithm/copy_n.h" }
-      module count                    { private header "__algorithm/count.h" }
-      module count_if                 { private header "__algorithm/count_if.h" }
-      module equal                    { private header "__algorithm/equal.h" }
-      module equal_range              { private header "__algorithm/equal_range.h" }
-      module fill                     { private header "__algorithm/fill.h" }
-      module fill_n                   { private header "__algorithm/fill_n.h" }
-      module find                     { private header "__algorithm/find.h" }
-      module find_end                 { private header "__algorithm/find_end.h" }
-      module find_first_of            { private header "__algorithm/find_first_of.h" }
-      module find_if                  { private header "__algorithm/find_if.h" }
-      module find_if_not              { private header "__algorithm/find_if_not.h" }
-      module for_each                 { private header "__algorithm/for_each.h" }
-      module for_each_n               { private header "__algorithm/for_each_n.h" }
-      module generate                 { private header "__algorithm/generate.h" }
-      module generate_n               { private header "__algorithm/generate_n.h" }
-      module half_positive            { private header "__algorithm/half_positive.h" }
-      module includes                 { private header "__algorithm/includes.h" }
-      module inplace_merge            { private header "__algorithm/inplace_merge.h" }
-      module is_heap                  { private header "__algorithm/is_heap.h" }
-      module is_heap_until            { private header "__algorithm/is_heap_until.h" }
-      module is_partitioned           { private header "__algorithm/is_partitioned.h" }
-      module is_permutation           { private header "__algorithm/is_permutation.h" }
-      module is_sorted                { private header "__algorithm/is_sorted.h" }
-      module is_sorted_until          { private header "__algorithm/is_sorted_until.h" }
-      module iter_swap                { private header "__algorithm/iter_swap.h" }
-      module lexicographical_compare  { private header "__algorithm/lexicographical_compare.h" }
-      module lower_bound              { private header "__algorithm/lower_bound.h" }
-      module make_heap                { private header "__algorithm/make_heap.h" }
-      module max                      { private header "__algorithm/max.h" }
-      module max_element              { private header "__algorithm/max_element.h" }
-      module merge                    { private header "__algorithm/merge.h" }
-      module min                      { private header "__algorithm/min.h" }
-      module min_element              { private header "__algorithm/min_element.h" }
-      module minmax                   { private header "__algorithm/minmax.h" }
-      module minmax_element           { private header "__algorithm/minmax_element.h" }
-      module mismatch                 { private header "__algorithm/mismatch.h" }
-      module move                     { private header "__algorithm/move.h" }
-      module move_backward            { private header "__algorithm/move_backward.h" }
-      module next_permutation         { private header "__algorithm/next_permutation.h" }
-      module none_of                  { private header "__algorithm/none_of.h" }
-      module nth_element              { private header "__algorithm/nth_element.h" }
-      module partial_sort             { private header "__algorithm/partial_sort.h" }
-      module partial_sort_copy        { private header "__algorithm/partial_sort_copy.h" }
-      module partition                { private header "__algorithm/partition.h" }
-      module partition_copy           { private header "__algorithm/partition_copy.h" }
-      module partition_point          { private header "__algorithm/partition_point.h" }
-      module pop_heap                 { private header "__algorithm/pop_heap.h" }
-      module prev_permutation         { private header "__algorithm/prev_permutation.h" }
-      module push_heap                { private header "__algorithm/push_heap.h" }
-      module ranges_find              { private header "__algorithm/ranges_find.h" }
-      module ranges_find_if           { private header "__algorithm/ranges_find_if.h" }
-      module ranges_find_if_not       { private header "__algorithm/ranges_find_if_not.h" }
-      module remove                   { private header "__algorithm/remove.h" }
-      module remove_copy              { private header "__algorithm/remove_copy.h" }
-      module remove_copy_if           { private header "__algorithm/remove_copy_if.h" }
-      module remove_if                { private header "__algorithm/remove_if.h" }
-      module replace                  { private header "__algorithm/replace.h" }
-      module replace_copy             { private header "__algorithm/replace_copy.h" }
-      module replace_copy_if          { private header "__algorithm/replace_copy_if.h" }
-      module replace_if               { private header "__algorithm/replace_if.h" }
-      module reverse                  { private header "__algorithm/reverse.h" }
-      module reverse_copy             { private header "__algorithm/reverse_copy.h" }
-      module rotate                   { private header "__algorithm/rotate.h" }
-      module rotate_copy              { private header "__algorithm/rotate_copy.h" }
-      module sample                   { private header "__algorithm/sample.h" }
-      module search                   { private header "__algorithm/search.h" }
-      module search_n                 { private header "__algorithm/search_n.h" }
-      module set_difference           { private header "__algorithm/set_difference.h" }
-      module set_intersection         { private header "__algorithm/set_intersection.h" }
-      module set_symmetric_difference { private header "__algorithm/set_symmetric_difference.h" }
-      module set_union                { private header "__algorithm/set_union.h" }
-      module shift_left               { private header "__algorithm/shift_left.h" }
-      module shift_right              { private header "__algorithm/shift_right.h" }
-      module shuffle                  { private header "__algorithm/shuffle.h" }
-      module sift_down                { private header "__algorithm/sift_down.h" }
-      module sort                     { private header "__algorithm/sort.h" }
-      module sort_heap                { private header "__algorithm/sort_heap.h" }
-      module stable_partition         { private header "__algorithm/stable_partition.h" }
-      module stable_sort              { private header "__algorithm/stable_sort.h" }
-      module swap_ranges              { private header "__algorithm/swap_ranges.h" }
-      module transform                { private header "__algorithm/transform.h" }
-      module unique                   { private header "__algorithm/unique.h" }
-      module unique_copy              { private header "__algorithm/unique_copy.h" }
-      module unwrap_iter              { private header "__algorithm/unwrap_iter.h" }
-      module upper_bound              { private header "__algorithm/upper_bound.h" }
-    }
-  }
-  module any {
-    header "any"
-    export *
-  }
-  module array {
-    header "array"
-    export initializer_list
-    export *
-  }
-  module atomic {
-    header "atomic"
-    export *
-  }
-  module barrier {
-    requires cplusplus14
-    header "barrier"
-    export *
-  }
-  module bit {
-    header "bit"
-    export *
-  }
-  module bitset {
-    header "bitset"
-    export string
-    export iosfwd
-    export *
-  }
-  // No submodule for cassert. It fundamentally needs repeated, textual inclusion.
-  module charconv {
-    header "charconv"
-    export *
-  }
-  module chrono {
-    header "chrono"
-    export *
-  }
-  module codecvt {
-    header "codecvt"
-    export *
-  }
-  module compare {
-    header "compare"
-    export *
-  }
-  module complex {
-    header "complex"
-    export *
-  }
-  module concepts {
-    header "concepts"
-    export *
-  }
-  module condition_variable {
-    header "condition_variable"
-    export *
-  }
-  module deque {
-    header "deque"
-    export initializer_list
-    export *
-  }
-  module exception {
-    header "exception"
-    export *
-  }
-  module execution {
-    header "execution"
-    export *
-  }
-  module filesystem {
-    header "filesystem"
-    export *
-  }
-  module format {
-    header "format"
-    export *
-
-    module __format {
-      module format_error         { private header "__format/format_error.h"         }
-      module format_parse_context { private header "__format/format_parse_context.h" }
-    }
-  }
-  module forward_list {
-    header "forward_list"
-    export initializer_list
-    export *
-  }
-  module fstream {
-    header "fstream"
-    export *
-  }
-  module functional {
-    header "functional"
-    export *
-
-    module __functional {
-      module binary_function            { private header "__functional/binary_function.h" }
-      module binary_negate              { private header "__functional/binary_negate.h" }
-      module bind                       { private header "__functional/bind.h" }
-      module bind_front                 { private header "__functional/bind_front.h" }
-      module binder1st                  { private header "__functional/binder1st.h" }
-      module binder2nd                  { private header "__functional/binder2nd.h" }
-      module default_searcher           { private header "__functional/default_searcher.h" }
-      module function                   { private header "__functional/function.h" }
-      module hash                       { private header "__functional/hash.h" }
-      module identity                   { private header "__functional/identity.h" }
-      module is_transparent             { private header "__functional/is_transparent.h" }
-      module invoke                     { private header "__functional/invoke.h" }
-      module mem_fn                     { private header "__functional/mem_fn.h"  }
-      module mem_fun_ref                { private header "__functional/mem_fun_ref.h"  }
-      module not_fn                     { private header "__functional/not_fn.h" }
-      module operations                 { private header "__functional/operations.h" }
-      module perfect_forward            { private header "__functional/perfect_forward.h" }
-      module pointer_to_binary_function { private header "__functional/pointer_to_binary_function.h" }
-      module pointer_to_unary_function  { private header "__functional/pointer_to_unary_function.h" }
-      module ranges_operations          { private header "__functional/ranges_operations.h" }
-      module reference_wrapper          { private header "__functional/reference_wrapper.h" }
-      module unary_function             { private header "__functional/unary_function.h" }
-      module unary_negate               { private header "__functional/unary_negate.h" }
-      module unwrap_ref                 { private header "__functional/unwrap_ref.h" }
-      module weak_result_type           { private header "__functional/weak_result_type.h" }
-    }
-  }
-  module future {
-    header "future"
-    export *
-  }
-  module initializer_list {
-    header "initializer_list"
-    export *
-  }
-  module iomanip {
-    header "iomanip"
-    export *
-  }
-  module ios {
-    header "ios"
-    export iosfwd
-    export *
-  }
-  module iosfwd {
-    header "iosfwd"
-    export *
-  }
-  module iostream {
-    header "iostream"
-    export ios
-    export streambuf
-    export istream
-    export ostream
-    export *
-  }
-  module istream {
-    header "istream"
-    // FIXME: should re-export ios, streambuf?
-    export *
-  }
-  module iterator {
-    header "iterator"
-    export *
-
-    module __iterator {
-      module access                { private header "__iterator/access.h" }
-      module advance               {
-        private header "__iterator/advance.h"
-        export __function_like
-      }
-      module back_insert_iterator  { private header "__iterator/back_insert_iterator.h" }
-      module common_iterator       { private header "__iterator/common_iterator.h" }
-      module concepts              { private header "__iterator/concepts.h" }
-      module counted_iterator      { private header "__iterator/counted_iterator.h" }
-      module data                  { private header "__iterator/data.h" }
-      module default_sentinel      { private header "__iterator/default_sentinel.h" }
-      module distance              { private header "__iterator/distance.h" }
-      module empty                 { private header "__iterator/empty.h" }
-      module erase_if_container    { private header "__iterator/erase_if_container.h" }
-      module front_insert_iterator { private header "__iterator/front_insert_iterator.h" }
-      module incrementable_traits  { private header "__iterator/incrementable_traits.h" }
-      module insert_iterator       { private header "__iterator/insert_iterator.h" }
-      module istream_iterator      { private header "__iterator/istream_iterator.h" }
-      module istreambuf_iterator   { private header "__iterator/istreambuf_iterator.h" }
-      module iter_move             { private header "__iterator/iter_move.h" }
-      module iter_swap             { private header "__iterator/iter_swap.h" }
-      module iterator              { private header "__iterator/iterator.h" }
-      module iterator_traits       { private header "__iterator/iterator_traits.h" }
-      module move_iterator         { private header "__iterator/move_iterator.h" }
-      module next                  {
-        private header "__iterator/next.h"
-        export __function_like
-      }
-      module ostream_iterator      { private header "__iterator/ostream_iterator.h" }
-      module ostreambuf_iterator   { private header "__iterator/ostreambuf_iterator.h" }
-      module prev                  {
-        private header "__iterator/prev.h"
-        export __function_like
-      }
-      module projected             { private header "__iterator/projected.h" }
-      module readable_traits       { private header "__iterator/readable_traits.h" }
-      module reverse_access        { private header "__iterator/reverse_access.h" }
-      module reverse_iterator      { private header "__iterator/reverse_iterator.h" }
-      module size                  { private header "__iterator/size.h" }
-      module wrap_iter             { private header "__iterator/wrap_iter.h" }
-    }
-  }
-  module latch {
-    requires cplusplus14
-    header "latch"
-    export *
-  }
-  module limits {
-    header "limits"
-    export *
-  }
-  module list {
-    header "list"
-    export initializer_list
-    export *
-  }
-  module locale {
-    header "locale"
-    export *
-  }
-  module map {
-    header "map"
-    export initializer_list
-    export *
-  }
-  module memory {
-    header "memory"
-    export *
-
-    module __memory {
-      module addressof                { private header "__memory/addressof.h"                }
-      module allocation_guard         { private header "__memory/allocation_guard.h"         }
-      module allocator                { private header "__memory/allocator.h"                }
-      module allocator_arg_t          { private header "__memory/allocator_arg_t.h"          }
-      module allocator_traits         { private header "__memory/allocator_traits.h"         }
-      module auto_ptr                 { private header "__memory/auto_ptr.h"                 }
-      module compressed_pair          { private header "__memory/compressed_pair.h"          }
-      module construct_at             { private header "__memory/construct_at.h"             }
-      module pointer_safety           { private header "__memory/pointer_safety.h"           }
-      module pointer_traits           { private header "__memory/pointer_traits.h"           }
-      module raw_storage_iterator     { private header "__memory/raw_storage_iterator.h"     }
-      module shared_ptr               { private header "__memory/shared_ptr.h"               }
-      module temporary_buffer         { private header "__memory/temporary_buffer.h"         }
-      module uninitialized_algorithms { private header "__memory/uninitialized_algorithms.h" }
-      module unique_ptr               { private header "__memory/unique_ptr.h"               }
-      module uses_allocator           { private header "__memory/uses_allocator.h"           }
-    }
-  }
-  module mutex {
-    header "mutex"
-    export *
-  }
-  module new {
-    header "new"
-    export *
-  }
-  module numbers {
-    header "numbers"
-    export *
-  }
-  module numeric {
-    header "numeric"
-    export *
-  }
-  module optional {
-    header "optional"
-    export *
-  }
-  module ostream {
-    header "ostream"
-    // FIXME: should re-export ios, streambuf?
-    export *
-  }
-  module queue {
-    header "queue"
-    export initializer_list
-    export *
-  }
-  module random {
-    header "random"
-    export initializer_list
-    export *
-
-    module __random {
-      module uniform_int_distribution { private header "__random/uniform_int_distribution.h" }
-    }
-  }
-  module ranges {
-    header "ranges"
-    export compare
-    export initializer_list
-    export iterator
-    export *
-
-    module __ranges {
-      module access                 { private header "__ranges/access.h"                }
-      module all                    { private header "__ranges/all.h"                   }
-      module common_view            { private header "__ranges/common_view.h"           }
-      module concepts               { private header "__ranges/concepts.h"              }
-      module copyable_box           { private header "__ranges/copyable_box.h"          }
-      module dangling               { private header "__ranges/dangling.h"              }
-      module data                   { private header "__ranges/data.h"                  }
-      module drop_view              { private header "__ranges/drop_view.h"             }
-      module empty                  { private header "__ranges/empty.h"                 }
-      module empty_view             { private header "__ranges/empty_view.h"            }
-      module enable_borrowed_range  { private header "__ranges/enable_borrowed_range.h" }
-      module enable_view            { private header "__ranges/enable_view.h"           }
-      module non_propagating_cache  { private header "__ranges/non_propagating_cache.h" }
-      module ref_view               { private header "__ranges/ref_view.h"              }
-      module size                   { private header "__ranges/size.h"                  }
-      module subrange               { private header "__ranges/subrange.h"              }
-      module transform_view         { private header "__ranges/transform_view.h"        }
-      module view_interface         { private header "__ranges/view_interface.h"        }
-    }
-  }
-  module ratio {
-    header "ratio"
-    export *
-  }
-  module regex {
-    header "regex"
-    export initializer_list
-    export *
-  }
-  module scoped_allocator {
-    header "scoped_allocator"
-    export *
-  }
-  module semaphore {
-    requires cplusplus14
-    header "semaphore"
-    export *
-  }
-  module set {
-    header "set"
-    export initializer_list
-    export *
-  }
-  module shared_mutex {
-    header "shared_mutex"
-    export version
-  }
-  module span {
-    header "span"
-    export ranges.__ranges.enable_borrowed_range
-    export version
-  }
-  module sstream {
-    header "sstream"
-    // FIXME: should re-export istream, ostream, ios, streambuf, string?
-    export *
-  }
-  module stack {
-    header "stack"
-    export initializer_list
-    export *
-  }
-  module stdexcept {
-    header "stdexcept"
-    export *
-  }
-  module streambuf {
-    header "streambuf"
-    export *
-  }
-  module string {
-    header "string"
-    export initializer_list
-    export string_view
-    export __string
-    export *
-  }
-  module string_view {
-    header "string_view"
-    export initializer_list
-    export __string
-    export *
-  }
-  module strstream {
-    header "strstream"
-    export *
-  }
-  module system_error {
-    header "system_error"
-    export *
-  }
-  module thread {
-    header "thread"
-    export *
-  }
-  module tuple {
-    header "tuple"
-    export *
-  }
-  module type_traits {
-    header "type_traits"
-    export functional.__functional.unwrap_ref
-    export *
-  }
-  module typeindex {
-    header "typeindex"
-    export *
-  }
-  module typeinfo {
-    header "typeinfo"
-    export *
-  }
-  module unordered_map {
-    header "unordered_map"
-    export initializer_list
-    export *
-  }
-  module unordered_set {
-    header "unordered_set"
-    export initializer_list
-    export *
-  }
-  module utility {
-    header "utility"
-    export initializer_list
-    export *
-
-    module __utility {
-      module __decay_copy        { private header "__utility/__decay_copy.h"        }
-      module as_const            { private header "__utility/as_const.h"            }
-      module cmp                 { private header "__utility/cmp.h"                 }
-      module declval             { private header "__utility/declval.h"             }
-      module exchange            { private header "__utility/exchange.h"            }
-      module forward             { private header "__utility/forward.h"             }
-      module in_place            { private header "__utility/in_place.h"            }
-      module integer_sequence    { private header "__utility/integer_sequence.h"    }
-      module move                { private header "__utility/move.h"                }
-      module pair                { private header "__utility/pair.h"                }
-      module piecewise_construct { private header "__utility/piecewise_construct.h" }
-      module rel_ops             { private header "__utility/rel_ops.h"             }
-      module swap                { private header "__utility/swap.h"                }
-      module to_underlying       { private header "__utility/to_underlying.h"       }
-    }
-  }
-  module valarray {
-    header "valarray"
-    export initializer_list
-    export *
-  }
-  module variant {
-    header "variant"
-    export *
-
-    module __variant {
-      module monostate { private header "__variant/monostate.h" }
-    }
-  }
-  module vector {
-    header "vector"
-    export initializer_list
-    export *
-  }
-  module version {
-    header "version"
-    export *
-  }
-
-  // __config not modularised due to a bug in Clang
-  // FIXME: These should be private.
-  module __availability      { private header "__availability"      export * }
-  module __bit_reference     { private header "__bit_reference"     export * }
-  module __bits              { private header "__bits"              export * }
-  module __debug             { header "__debug"             export * }
-  module __errc              { private header "__errc"              export * }
-  module __function_like     { private header "__function_like.h"   export * }
-  module __hash_table        { header "__hash_table"        export * }
-  module __locale            { private header "__locale"            export * }
-  module __mutex_base        { private header "__mutex_base"        export * }
-  module __node_handle       { private header "__node_handle"       export * }
-  module __nullptr           { header "__nullptr"           export * }
-  module __split_buffer      { private header "__split_buffer"      export * }
-  module __std_stream        { private header "__std_stream"        export * }
-  module __string            { private header "__string"            export * }
-  module __threading_support { header "__threading_support" export * }
-  module __tree              { header "__tree"              export * }
-  module __tuple             { private header "__tuple"             export * }
-  module __undef_macros      { header "__undef_macros"      export * }
-
-  module experimental {
-    requires cplusplus11
-
-    module algorithm {
-      header "experimental/algorithm"
-      export *
-    }
-     module coroutine {
-      requires coroutines
-      header "experimental/coroutine"
-      export *
-    }
-    module deque {
-      header "experimental/deque"
-      export *
-    }
-    module filesystem {
-      header "experimental/filesystem"
-      export *
-    }
-    module forward_list {
-      header "experimental/forward_list"
-      export *
-    }
-    module functional {
-      header "experimental/functional"
-      export *
-    }
-    module iterator {
-      header "experimental/iterator"
-      export *
-    }
-    module list {
-      header "experimental/list"
-      export *
-    }
-    module map {
-      header "experimental/map"
-      export *
-    }
-    module memory_resource {
-      header "experimental/memory_resource"
-      export *
-    }
-    module propagate_const {
-      header "experimental/propagate_const"
-      export *
-    }
-    module regex {
-      header "experimental/regex"
-      export *
-    }
-    module simd {
-      header "experimental/simd"
-      export *
-    }
-    module set {
-      header "experimental/set"
-      export *
-    }
-    module span {
-      header "span"
-      export *
-    }
-    module string {
-      header "experimental/string"
-      export *
-    }
-    module type_traits {
-      header "experimental/type_traits"
-      export *
-    }
-    module unordered_map {
-      header "experimental/unordered_map"
-      export *
-    }
-    module unordered_set {
-      header "experimental/unordered_set"
-      export *
-    }
-    module utility {
-      header "experimental/utility"
-      export *
-    }
-    module vector {
-      header "experimental/vector"
-      export *
-    }
-    // FIXME these should be private
-    module __memory {
-      header "experimental/__memory"
-      export *
-    }
-  } // end experimental
-}
diff --git a/gnu/llvm/libcxx/include/stdio.h b/gnu/llvm/libcxx/include/stdio.h
index b57268c2641..72ed5c9f94a 100644
--- a/gnu/llvm/libcxx/include/stdio.h
+++ b/gnu/llvm/libcxx/include/stdio.h
@@ -1,5 +1,5 @@
 // -*- C++ -*-
-//===---------------------------- stdio.h ---------------------------------===//
+//===----------------------------------------------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
@@ -10,7 +10,7 @@
 #if defined(__need_FILE) || defined(__need___FILE)
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
+#  pragma GCC system_header
 #endif
 
 #include_next <stdio.h>
@@ -101,10 +101,12 @@ void perror(const char* s);
 #include <__config>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
+#  pragma GCC system_header
 #endif
 
-#include_next <stdio.h>
+#  if __has_include_next(<stdio.h>)
+#    include_next <stdio.h>
+#  endif
 
 #ifdef __cplusplus
 
diff --git a/gnu/llvm/libcxx/include/stdlib.h b/gnu/llvm/libcxx/include/stdlib.h
index 242eedc22a5..4dd3a9c14ab 100644
--- a/gnu/llvm/libcxx/include/stdlib.h
+++ b/gnu/llvm/libcxx/include/stdlib.h
@@ -1,5 +1,5 @@
 // -*- C++ -*-
-//===--------------------------- stdlib.h ---------------------------------===//
+//===----------------------------------------------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
@@ -10,7 +10,7 @@
 #if defined(__need_malloc_and_calloc)
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
+#  pragma GCC system_header
 #endif
 
 #include_next <stdlib.h>
@@ -87,43 +87,47 @@ void *aligned_alloc(size_t alignment, size_t size);                       // C11
 #include <__config>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#pragma GCC system_header
+#  pragma GCC system_header
 #endif
 
-#include_next <stdlib.h>
+#  if __has_include_next(<stdlib.h>)
+#    include_next <stdlib.h>
+#  endif
 
 #ifdef __cplusplus
 extern "C++" {
 // abs
 
-#undef abs
-#undef labs
-#ifndef _LIBCPP_HAS_NO_LONG_LONG
-#undef llabs
+#ifdef abs
+# undef abs
+#endif
+#ifdef labs
+# undef labs
+#endif
+#ifdef llabs
+# undef llabs
 #endif
 
 // MSVCRT already has the correct prototype in <stdlib.h> if __cplusplus is defined
 #if !defined(_LIBCPP_MSVCRT) && !defined(__sun__)
-inline _LIBCPP_INLINE_VISIBILITY long abs(long __x) _NOEXCEPT {
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY long abs(long __x) _NOEXCEPT {
   return __builtin_labs(__x);
 }
-#ifndef _LIBCPP_HAS_NO_LONG_LONG
-inline _LIBCPP_INLINE_VISIBILITY long long abs(long long __x) _NOEXCEPT {
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY long long abs(long long __x) _NOEXCEPT {
   return __builtin_llabs(__x);
 }
-#endif // _LIBCPP_HAS_NO_LONG_LONG
 #endif // !defined(_LIBCPP_MSVCRT) && !defined(__sun__)
 
 #if !defined(__sun__)
-inline _LIBCPP_INLINE_VISIBILITY float abs(float __lcpp_x) _NOEXCEPT {
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY float abs(float __lcpp_x) _NOEXCEPT {
   return __builtin_fabsf(__lcpp_x); // Use builtins to prevent needing math.h
 }
 
-inline _LIBCPP_INLINE_VISIBILITY double abs(double __lcpp_x) _NOEXCEPT {
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY double abs(double __lcpp_x) _NOEXCEPT {
   return __builtin_fabs(__lcpp_x);
 }
 
-inline _LIBCPP_INLINE_VISIBILITY long double
+_LIBCPP_NODISCARD_EXT inline _LIBCPP_INLINE_VISIBILITY long double
 abs(long double __lcpp_x) _NOEXCEPT {
   return __builtin_fabsl(__lcpp_x);
 }
@@ -131,10 +135,14 @@ abs(long double __lcpp_x) _NOEXCEPT {
 
 // div
 
-#undef div
-#undef ldiv
-#ifndef _LIBCPP_HAS_NO_LONG_LONG
-#undef lldiv
+#ifdef div
+# undef div
+#endif
+#ifdef ldiv
+# undef ldiv
+#endif
+#ifdef lldiv
+# undef lldiv
 #endif
 
 // MSVCRT already has the correct prototype in <stdlib.h> if __cplusplus is defined
@@ -142,12 +150,12 @@ abs(long double __lcpp_x) _NOEXCEPT {
 inline _LIBCPP_INLINE_VISIBILITY ldiv_t div(long __x, long __y) _NOEXCEPT {
   return ::ldiv(__x, __y);
 }
-#ifndef _LIBCPP_HAS_NO_LONG_LONG
+#if !(defined(__FreeBSD__) && !defined(__LONG_LONG_SUPPORTED))
 inline _LIBCPP_INLINE_VISIBILITY lldiv_t div(long long __x,
                                              long long __y) _NOEXCEPT {
   return ::lldiv(__x, __y);
 }
-#endif // _LIBCPP_HAS_NO_LONG_LONG
+#endif
 #endif // _LIBCPP_MSVCRT / __sun__
 } // extern "C++"
 #endif // __cplusplus
diff --git a/gnu/llvm/libcxx/lib/abi/arm64-apple-darwin.libcxxabi.v1.stable.exceptions.no_new_in_libcxx.abilist b/gnu/llvm/libcxx/lib/abi/arm64-apple-darwin.libcxxabi.v1.stable.exceptions.no_new_in_libcxx.abilist
deleted file mode 100644
index f2dbb6e6609..00000000000
--- a/gnu/llvm/libcxx/lib/abi/arm64-apple-darwin.libcxxabi.v1.stable.exceptions.no_new_in_libcxx.abilist
+++ /dev/null
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diff --git a/gnu/llvm/libcxx/lib/abi/x86_64-apple-darwin.libcxxabi.v1.stable.exceptions.no_new_in_libcxx.abilist b/gnu/llvm/libcxx/lib/abi/x86_64-apple-darwin.libcxxabi.v1.stable.exceptions.no_new_in_libcxx.abilist
deleted file mode 100644
index 17739ea6ded..00000000000
--- a/gnu/llvm/libcxx/lib/abi/x86_64-apple-darwin.libcxxabi.v1.stable.exceptions.no_new_in_libcxx.abilist
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diff --git a/gnu/llvm/libcxx/lib/abi/x86_64-unknown-linux-gnu.libcxxabi.v1.stable.exceptions.no_new_in_libcxx.abilist b/gnu/llvm/libcxx/lib/abi/x86_64-unknown-linux-gnu.libcxxabi.v1.stable.exceptions.no_new_in_libcxx.abilist
deleted file mode 100644
index 927b36f5945..00000000000
--- a/gnu/llvm/libcxx/lib/abi/x86_64-unknown-linux-gnu.libcxxabi.v1.stable.exceptions.no_new_in_libcxx.abilist
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-__ZTSN10__cxxabiv120__si_class_type_infoE
-__ZTSN10__cxxabiv120__function_type_infoE
-__ZTSN10__cxxabiv119__pointer_type_infoE
-__ZTSN10__cxxabiv117__pbase_type_infoE
-__ZTSN10__cxxabiv117__class_type_infoE
-__ZTSN10__cxxabiv117__array_type_infoE
-__ZTSN10__cxxabiv116__enum_type_infoE
-__ZTIy
-__ZTIx
-__ZTIw
-__ZTIv
-__ZSt13get_terminatev
-__ZSt13set_terminatePFvvE
-__ZSt14get_unexpectedv
-__ZSt14set_unexpectedPFvvE
-__ZSt15get_new_handlerv
-__ZSt15set_new_handlerPFvvE
-__ZSt9terminatev
-__ZNSt9bad_allocD1Ev
-__ZTISt9bad_alloc
-__ZNSt9bad_allocC1Ev
-__ZTISt13bad_exception
-__ZTVSt10bad_typeid
-__ZTVSt9exception
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-__ZNSt10bad_typeidC1Ev
-__ZNKSt10bad_typeid4whatEv
-__ZNSt10bad_typeidD1Ev
-__ZTVSt8bad_cast
-__ZNSt8bad_castC1Ev
-__ZNSt8bad_castC2Ev
-__ZNSt8bad_castD0Ev
-__ZNKSt8bad_cast4whatEv
-__ZNSt8bad_castD1Ev
-__ZNSt8bad_castD2Ev
-__ZTVSt9bad_alloc
-__ZTVSt20bad_array_new_length
-__ZTVSt13bad_exception
-__ZNKSt9exception4whatEv
-__ZNKSt9bad_alloc4whatEv
-__ZNSt9bad_allocC2Ev
-__ZNSt9bad_allocD0Ev
-__ZNSt9bad_allocD2Ev
-__ZNSt9exceptionD0Ev
-__ZNSt20bad_array_new_lengthC1Ev
-__ZNKSt13bad_exception4whatEv
-__ZNSt9exceptionD1Ev
-__ZNKSt20bad_array_new_length4whatEv
-__ZNSt13bad_exceptionD1Ev
-__ZNSt20bad_array_new_lengthD1Ev
-__ZNSt9exceptionD2Ev
-__ZNSt9type_infoD0Ev
-__ZNSt9type_infoD1Ev
-__ZNSt9type_infoD2Ev
-__ZNSt10bad_typeidC2Ev
-__ZNSt10bad_typeidD0Ev
-__ZNSt10bad_typeidD2Ev
-__ZNSt13bad_exceptionD0Ev
-__ZNSt13bad_exceptionD2Ev
-__ZNSt20bad_array_new_lengthC2Ev
-__ZNSt20bad_array_new_lengthD0Ev
-__ZNSt20bad_array_new_lengthD2Ev
-__ZSt10unexpectedv
-__ZTISt10bad_typeid
-__ZTISt8bad_cast
-___cxa_bad_typeid
-___cxa_bad_cast
-__ZTISt9exception
-__ZTISt9type_info
-__ZTISt20bad_array_new_length
-
-__ZNKSt11logic_error4whatEv
-__ZNSt11logic_errorD0Ev
-__ZNSt11logic_errorD1Ev
-__ZNSt11logic_errorD2Ev
-__ZTISt11logic_error
-__ZTSSt11logic_error
-__ZTVSt11logic_error
-
-__ZNKSt13runtime_error4whatEv
-__ZNSt13runtime_errorD0Ev
-__ZNSt13runtime_errorD1Ev
-__ZNSt13runtime_errorD2Ev
-__ZTISt13runtime_error
-__ZTSSt13runtime_error
-__ZTVSt13runtime_error
-
-__ZNSt11range_errorD0Ev
-__ZNSt11range_errorD1Ev
-__ZNSt11range_errorD2Ev
-__ZTISt11range_error
-__ZTSSt11range_error
-__ZTVSt11range_error
-
-__ZNSt12domain_errorD0Ev
-__ZNSt12domain_errorD1Ev
-__ZNSt12domain_errorD2Ev
-__ZTISt12domain_error
-__ZTSSt12domain_error
-__ZTVSt12domain_error
-
-__ZNSt12length_errorD0Ev
-__ZNSt12length_errorD1Ev
-__ZNSt12length_errorD2Ev
-__ZTISt12length_error
-__ZTSSt12length_error
-__ZTVSt12length_error
-
-__ZNSt12out_of_rangeD0Ev
-__ZNSt12out_of_rangeD1Ev
-__ZNSt12out_of_rangeD2Ev
-__ZTISt12out_of_range
-__ZTSSt12out_of_range
-__ZTVSt12out_of_range
-
-__ZNSt14overflow_errorD0Ev
-__ZNSt14overflow_errorD1Ev
-__ZNSt14overflow_errorD2Ev
-__ZTISt14overflow_error
-__ZTSSt14overflow_error
-__ZTVSt14overflow_error
-
-__ZNSt15underflow_errorD0Ev
-__ZNSt15underflow_errorD1Ev
-__ZNSt15underflow_errorD2Ev
-__ZTISt15underflow_error
-__ZTSSt15underflow_error
-__ZTVSt15underflow_error
-
-__ZNSt16invalid_argumentD0Ev
-__ZNSt16invalid_argumentD1Ev
-__ZNSt16invalid_argumentD2Ev
-__ZTISt16invalid_argument
-__ZTSSt16invalid_argument
-__ZTVSt16invalid_argument
-
-__ZTSDi
-__ZTSDn
-__ZTSDs
-__ZTSPDi
-__ZTSPDn
-__ZTSPDs
-__ZTSPKDi
-__ZTSPKDn
-__ZTSPKDs
-
-__ZTSSt8bad_cast
-__ZTSSt9bad_alloc
-__ZTSSt9exception
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-__ZTSSt10bad_typeid
-__ZTSSt13bad_exception
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-__ZTVSt9type_info
diff --git a/gnu/llvm/libcxx/src/random.cpp b/gnu/llvm/libcxx/src/random.cpp
index 8ea080842e0..38732462cf5 100644
--- a/gnu/llvm/libcxx/src/random.cpp
+++ b/gnu/llvm/libcxx/src/random.cpp
@@ -1,4 +1,4 @@
-//===-------------------------- random.cpp --------------------------------===//
+//===----------------------------------------------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
@@ -9,16 +9,16 @@
 #include <__config>
 
 #if defined(_LIBCPP_USING_WIN32_RANDOM)
-// Must be defined before including stdlib.h to enable rand_s().
-#define _CRT_RAND_S
+    // Must be defined before including stdlib.h to enable rand_s().
+#   define _CRT_RAND_S
 #endif // defined(_LIBCPP_USING_WIN32_RANDOM)
 
-#include "limits"
-#include "random"
-#include "system_error"
+#include <limits>
+#include <random>
+#include <system_error>
 
 #if defined(__sun__)
-#define rename solaris_headers_are_broken
+#   define rename solaris_headers_are_broken
 #endif // defined(__sun__)
 
 #include <errno.h>
@@ -26,16 +26,18 @@
 #include <stdlib.h>
 
 #if defined(_LIBCPP_USING_GETENTROPY)
-#include <sys/random.h>
+#   include <sys/random.h>
 #elif defined(_LIBCPP_USING_DEV_RANDOM)
-#include <fcntl.h>
-#include <unistd.h>
-#if __has_include(<sys/ioctl.h>) && __has_include(<linux/random.h>)
-#include <sys/ioctl.h>
-#include <linux/random.h>
-#endif
+#   include <fcntl.h>
+#   include <unistd.h>
+#   if __has_include(<sys/ioctl.h>) && __has_include(<linux/random.h>)
+#       include <sys/ioctl.h>
+#       include <linux/random.h>
+#   endif
 #elif defined(_LIBCPP_USING_NACL_RANDOM)
-#include <nacl/nacl_random.h>
+#   include <nacl/nacl_random.h>
+#elif defined(_LIBCPP_USING_FUCHSIA_CPRNG)
+#  include <zircon/syscalls.h>
 #endif
 
 
@@ -66,10 +68,8 @@ random_device::operator()()
 
 #elif defined(_LIBCPP_USING_ARC4_RANDOM)
 
-random_device::random_device(const string& __token)
+random_device::random_device(const string&)
 {
-    if (__token != "/dev/urandom")
-        __throw_system_error(ENOENT, ("random device not supported " + __token).c_str());
 }
 
 random_device::~random_device()
@@ -170,6 +170,27 @@ random_device::operator()()
     return r;
 }
 
+#elif defined(_LIBCPP_USING_FUCHSIA_CPRNG)
+
+random_device::random_device(const string& __token) {
+  if (__token != "/dev/urandom")
+    __throw_system_error(ENOENT, ("random device not supported " + __token).c_str());
+}
+
+random_device::~random_device() {}
+
+unsigned random_device::operator()() {
+  // Implicitly link against the vDSO system call ABI without
+  // requiring the final link to specify -lzircon explicitly when
+  // statically linking libc++.
+#  pragma comment(lib, "zircon")
+
+  // The system call cannot fail.  It returns only when the bits are ready.
+  unsigned r;
+  _zx_cprng_draw(&r, sizeof(r));
+  return r;
+}
+
 #else
 #error "Random device not implemented for this architecture"
 #endif
@@ -189,7 +210,7 @@ random_device::entropy() const noexcept
     return std::numeric_limits<result_type>::digits;
 
   return ent;
-#elif defined(__OpenBSD__)
+#elif defined(_LIBCPP_USING_ARC4_RANDOM) || defined(_LIBCPP_USING_FUCHSIA_CPRNG)
   return std::numeric_limits<result_type>::digits;
 #else
   return 0;
diff --git a/gnu/llvm/libcxx/src/thread.cpp b/gnu/llvm/libcxx/src/thread.cpp
index 8dddb240b5a..ec4f65f9823 100644
--- a/gnu/llvm/libcxx/src/thread.cpp
+++ b/gnu/llvm/libcxx/src/thread.cpp
@@ -6,14 +6,15 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "__config"
+#include <__config>
+
 #ifndef _LIBCPP_HAS_NO_THREADS
 
-#include "thread"
-#include "exception"
-#include "vector"
-#include "future"
-#include "limits"
+#include <exception>
+#include <future>
+#include <limits>
+#include <thread>
+#include <vector>
 
 #if __has_include(<unistd.h>)
 # include <unistd.h> // for sysconf
@@ -114,8 +115,13 @@ sleep_for(const chrono::nanoseconds& ns)
 __thread_specific_ptr<__thread_struct>&
 __thread_local_data()
 {
-    static __thread_specific_ptr<__thread_struct> __p;
-    return __p;
+  // Even though __thread_specific_ptr's destructor doesn't actually destroy
+  // anything (see comments there), we can't call it at all because threads may
+  // outlive the static variable and calling its destructor means accessing an
+  // object outside of its lifetime, which is UB.
+  alignas(__thread_specific_ptr<__thread_struct>) static char __b[sizeof(__thread_specific_ptr<__thread_struct>)];
+  static __thread_specific_ptr<__thread_struct>* __p = new (__b) __thread_specific_ptr<__thread_struct>();
+  return *__p;
 }
 
 // __thread_struct_imp
@@ -158,8 +164,8 @@ __thread_struct_imp::~__thread_struct_imp()
     for (_Notify::iterator i = notify_.begin(), e = notify_.end();
             i != e; ++i)
     {
-        i->second->unlock();
         i->first->notify_all();
+        i->second->unlock();
     }
     for (_AsyncStates::iterator i = async_states_.begin(), e = async_states_.end();
             i != e; ++i)
diff --git a/gnu/llvm/libcxx/utils/ci/runtimes/CMakeLists.txt b/gnu/llvm/libcxx/utils/ci/runtimes/CMakeLists.txt
deleted file mode 100644
index 43ebf9e4a19..00000000000
--- a/gnu/llvm/libcxx/utils/ci/runtimes/CMakeLists.txt
+++ /dev/null
@@ -1,26 +0,0 @@
-cmake_minimum_required(VERSION 3.4.3)
-
-if(POLICY CMP0068)
-  cmake_policy(SET CMP0068 NEW)
-  set(CMAKE_BUILD_WITH_INSTALL_NAME_DIR ON)
-endif()
-
-if(POLICY CMP0075)
-  cmake_policy(SET CMP0075 NEW)
-endif()
-
-if(POLICY CMP0077)
-  cmake_policy(SET CMP0077 NEW)
-endif()
-
-set(PACKAGE_VERSION "11.0.0git")
-
-project(LLVM_RUNTIMES)
-
-# Include individual projects
-set(LLVM_ENABLE_PROJECTS "" CACHE STRING "Semicolon-separated list of runtimes to build.")
-
-set(LLVM_UMBRELLA_ROOT "${CMAKE_CURRENT_SOURCE_DIR}/../../../..")
-foreach(project IN LISTS LLVM_ENABLE_PROJECTS)
-    add_subdirectory("${LLVM_UMBRELLA_ROOT}/${project}" "${CMAKE_CURRENT_BINARY_DIR}/${project}")
-endforeach()
diff --git a/gnu/llvm/libcxx/utils/generate_private_header_tests.py b/gnu/llvm/libcxx/utils/generate_private_header_tests.py
deleted file mode 100755
index 10acb921496..00000000000
--- a/gnu/llvm/libcxx/utils/generate_private_header_tests.py
+++ /dev/null
@@ -1,83 +0,0 @@
-#!/usr/bin/env python
-
-import os
-import re
-import shutil
-from pathlib import Path
-
-
-def get_libcxx_paths():
-    utils_path = os.path.dirname(os.path.abspath(__file__))
-    script_name = os.path.basename(__file__)
-    assert os.path.exists(utils_path)
-    src_root = os.path.dirname(utils_path)
-    include_path = os.path.join(src_root, 'include')
-    assert os.path.exists(include_path)
-    docs_path = os.path.join(src_root, 'docs')
-    assert os.path.exists(docs_path)
-    detail_header_test_root = os.path.join(src_root, 'test', 'libcxx',
-                                           'diagnostics', 'detail.headers')
-    assert os.path.exists(detail_header_test_root)
-    shutil.rmtree(detail_header_test_root)
-    Path(f'{detail_header_test_root}').mkdir()
-    assert os.path.exists(detail_header_test_root)
-    return script_name, src_root, include_path, docs_path, detail_header_test_root
-
-
-script_name, source_root, include_path, docs_path, detail_header_test_root = get_libcxx_paths(
-)
-
-
-def generate_test(header):
-    return f'''// -*- C++ -*-
-//===----------------------------------------------------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-// REQUIRES: modules-build
-
-// WARNING: This test was generated by '{script_name}'
-// and should not be edited manually.
-
-// expected-error@*:* {{{{use of private header from outside its module: '{header}'}}}}
-#include <{header}>
-'''
-
-
-def relative_path(path):
-    return path.as_posix()[len(include_path + '/'):]
-
-
-def is_still_public(path):
-    rp = relative_path(path)
-    return not rp.startswith('__support') and rp not in [
-        "__bsd_locale_defaults.h", "__bsd_locale_fallbacks.h", "__config",
-        "__config_site.in", "__debug", "__hash_table", "__functional_base",
-        "__libcpp_version", "__nullptr", "__threading_support", "__tree",
-        "__undef_macros"
-    ]
-
-
-def main():
-    paths = [
-        relative_path(p) for p in Path(include_path).rglob('*')
-        if relative_path(p).startswith('__') and not p.is_dir()
-        and is_still_public(p)
-    ]
-    for path in paths:
-        path_with_subdir = re.search(r'__(\w+)/(\w+)', path)
-        directory = path_with_subdir.group(1) + '/' if path_with_subdir else ""
-        file = path_with_subdir.group(2) if path_with_subdir else path[2:]
-        path_to_write = f'{detail_header_test_root}/{directory}{file}.module.verify.cpp'
-        Path(f'{detail_header_test_root}/{directory}').mkdir(exist_ok=True)
-        assert os.path.exists(f'{detail_header_test_root}/{directory}')
-        with open(path_to_write, 'w') as f:
-            f.write(generate_test(path))
-
-
-if __name__ == '__main__':
-    main()
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/.clang-format b/gnu/llvm/libcxx/utils/google-benchmark/.clang-format
deleted file mode 100644
index 06ea346a106..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/.clang-format
+++ /dev/null
@@ -1,4 +0,0 @@
----
-Language:        Cpp
-BasedOnStyle:  Google
-...
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/.github/.libcxx-setup.sh b/gnu/llvm/libcxx/utils/google-benchmark/.github/.libcxx-setup.sh
deleted file mode 100755
index 56008403ae9..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/.github/.libcxx-setup.sh
+++ /dev/null
@@ -1,24 +0,0 @@
-#!/usr/bin/env bash
-
-# Checkout LLVM sources
-git clone --depth=1 https://github.com/llvm/llvm-project.git llvm-project
-
-# Setup libc++ options
-if [ -z "$BUILD_32_BITS" ]; then
-  export BUILD_32_BITS=OFF && echo disabling 32 bit build
-fi
-
-# Build and install libc++ (Use unstable ABI for better sanitizer coverage)
-cd ./llvm-project
-cmake -DCMAKE_C_COMPILER=${C_COMPILER}          \
-      -DCMAKE_CXX_COMPILER=${COMPILER}          \
-      -DCMAKE_BUILD_TYPE=RelWithDebInfo         \
-      -DCMAKE_INSTALL_PREFIX=/usr               \
-      -DLIBCXX_ABI_UNSTABLE=OFF                 \
-      -DLLVM_USE_SANITIZER=${LIBCXX_SANITIZER}  \
-      -DLLVM_BUILD_32_BITS=${BUILD_32_BITS}     \
-      -DLLVM_ENABLE_PROJECTS='libcxx;libcxxabi' \
-      -S llvm -B llvm-build -G "Unix Makefiles"
-make -C llvm-build -j3 cxx cxxabi
-sudo make -C llvm-build install-cxx install-cxxabi
-cd ..
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/.github/ISSUE_TEMPLATE/bug_report.md b/gnu/llvm/libcxx/utils/google-benchmark/.github/ISSUE_TEMPLATE/bug_report.md
deleted file mode 100644
index 6c2ced9b2ec..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/.github/ISSUE_TEMPLATE/bug_report.md
+++ /dev/null
@@ -1,32 +0,0 @@
----
-name: Bug report
-about: Create a report to help us improve
-title: "[BUG]"
-labels: ''
-assignees: ''
-
----
-
-**Describe the bug**
-A clear and concise description of what the bug is.
-
-**System**
-Which OS, compiler, and compiler version are you using:
-  - OS: 
-  - Compiler and version: 
-
-**To reproduce**
-Steps to reproduce the behavior:
-1. sync to commit ...
-2. cmake/bazel...
-3. make ...
-4. See error
-
-**Expected behavior**
-A clear and concise description of what you expected to happen.
-
-**Screenshots**
-If applicable, add screenshots to help explain your problem.
-
-**Additional context**
-Add any other context about the problem here.
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/.github/ISSUE_TEMPLATE/feature_request.md b/gnu/llvm/libcxx/utils/google-benchmark/.github/ISSUE_TEMPLATE/feature_request.md
deleted file mode 100644
index 9e8ab6a673f..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/.github/ISSUE_TEMPLATE/feature_request.md
+++ /dev/null
@@ -1,20 +0,0 @@
----
-name: Feature request
-about: Suggest an idea for this project
-title: "[FR]"
-labels: ''
-assignees: ''
-
----
-
-**Is your feature request related to a problem? Please describe.**
-A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
-
-**Describe the solution you'd like**
-A clear and concise description of what you want to happen.
-
-**Describe alternatives you've considered**
-A clear and concise description of any alternative solutions or features you've considered.
-
-**Additional context**
-Add any other context or screenshots about the feature request here.
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/.github/workflows/bazel.yml b/gnu/llvm/libcxx/utils/google-benchmark/.github/workflows/bazel.yml
deleted file mode 100644
index a53661b2f9b..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/.github/workflows/bazel.yml
+++ /dev/null
@@ -1,30 +0,0 @@
-name: bazel
-
-on:
-  push: {}
-  pull_request: {}
-
-jobs:
-  build-and-test:
-    runs-on: ubuntu-latest
-    
-    steps:
-    - uses: actions/checkout@v1
-
-    - name: mount bazel cache
-      uses: actions/cache@v2.0.0
-      env:
-        cache-name: bazel-cache
-      with:
-        path: "~/.cache/bazel"
-        key: ${{ env.cache-name }}-${{ runner.os }}-${{ github.ref }}
-        restore-keys: |
-          ${{ env.cache-name }}-${{ runner.os }}-main
-
-    - name: build
-      run: |
-        bazel build //:benchmark //:benchmark_main //test/...
-
-    - name: test
-      run: |
-        bazel test --test_output=all //test/...
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/.github/workflows/build-and-test-perfcounters.yml b/gnu/llvm/libcxx/utils/google-benchmark/.github/workflows/build-and-test-perfcounters.yml
deleted file mode 100644
index b2b54191976..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/.github/workflows/build-and-test-perfcounters.yml
+++ /dev/null
@@ -1,44 +0,0 @@
-name: build-and-test-perfcounters
-
-on:
-  push:
-    branches: [ main ]
-  pull_request:
-    branches: [ main ]
-
-jobs:
-  job:
-    # TODO(dominic): Extend this to include compiler and set through env: CC/CXX.
-    name: ${{ matrix.os }}.${{ matrix.build_type }}
-    runs-on: ${{ matrix.os }}
-    strategy:
-      fail-fast: false
-      matrix:
-        os: [ubuntu-latest, ubuntu-16.04, ubuntu-20.04]
-        build_type: ['Release', 'Debug']
-    steps:
-    - uses: actions/checkout@v2
-
-    - name: install libpfm
-      run: sudo apt install libpfm4-dev
-
-    - name: create build environment
-      run: cmake -E make_directory ${{ runner.workspace }}/_build
-
-    - name: configure cmake
-      shell: bash
-      working-directory: ${{ runner.workspace }}/_build
-      run: cmake  -DBENCHMARK_ENABLE_LIBPFM=1 -DBENCHMARK_DOWNLOAD_DEPENDENCIES=ON $GITHUB_WORKSPACE -DCMAKE_BUILD_TYPE=${{ matrix.build_type }}
-
-    - name: build
-      shell: bash
-      working-directory: ${{ runner.workspace }}/_build
-      run: cmake --build . --config ${{ matrix.build_type }}
-
-    # Skip testing, for now. It seems perf_event_open does not succeed on the
-    # hosting machine, very likely a permissions issue.
-    # TODO(mtrofin): Enable test.
-    # - name: test
-    #   shell: bash
-    #   working-directory: ${{ runner.workspace }}/_build
-    #   run: sudo ctest -C ${{ matrix.build_type }} --rerun-failed --output-on-failure
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/.github/workflows/build-and-test.yml b/gnu/llvm/libcxx/utils/google-benchmark/.github/workflows/build-and-test.yml
deleted file mode 100644
index 9e5be3b1dc1..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/.github/workflows/build-and-test.yml
+++ /dev/null
@@ -1,110 +0,0 @@
-name: build-and-test
-
-on:
-  push: {}
-  pull_request: {}
-
-jobs:
-  # TODO: add 32-bit builds (g++ and clang++) for ubuntu
-  #   (requires g++-multilib and libc6:i386)
-  # TODO: add coverage build (requires lcov)
-  # TODO: add clang + libc++ builds for ubuntu
-  # TODO: add clang + ubsan/asan/msan + libc++ builds for ubuntu
-  job:
-    name: ${{ matrix.os }}.${{ matrix.build_type }}.${{ matrix.compiler }}
-    runs-on: ${{ matrix.os }}
-    strategy:
-      fail-fast: false
-      matrix:
-        os: [ubuntu-latest, ubuntu-16.04, ubuntu-20.04, macos-latest]
-        build_type: ['Release', 'Debug']
-        compiler: [g++, clang++]
-        include:
-          - displayTargetName: windows-latest-release
-            os: windows-latest
-            build_type: 'Release'
-          - displayTargetName: windows-latest-debug
-            os: windows-latest
-            build_type: 'Debug'
-    steps:
-      - uses: actions/checkout@v2
-
-      - name: create build environment
-        run: cmake -E make_directory ${{ runner.workspace }}/_build
-
-      - name: configure cmake
-        env:
-          CXX: ${{ matrix.compiler }}
-        shell: bash
-        working-directory: ${{ runner.workspace }}/_build
-        run: >
-          cmake $GITHUB_WORKSPACE
-          -DBENCHMARK_DOWNLOAD_DEPENDENCIES=ON
-          -DCMAKE_BUILD_TYPE=${{ matrix.build_type }}
-
-      - name: build
-        shell: bash
-        working-directory: ${{ runner.workspace }}/_build
-        run: cmake --build . --config ${{ matrix.build_type }}
-
-      - name: test
-        shell: bash
-        working-directory: ${{ runner.workspace }}/_build
-        run: ctest -C ${{ matrix.build_type }} -VV
-
-  ubuntu-14_04:
-    name: ubuntu-14.04.${{ matrix.build_type }}.${{ matrix.compiler }}
-    runs-on: [ubuntu-latest]
-    strategy:
-      fail-fast: false
-      matrix:
-        build_type: ['Release', 'Debug']
-        compiler: [g++-4.8, clang++-3.6]
-        include:
-          - compiler: g++-6
-            build_type: 'Debug'
-            run_tests: true
-          - compiler: g++-6
-            build_type: 'Release'
-            run_tests: true
-    container: ubuntu:14.04
-    steps:
-      - uses: actions/checkout@v2
-
-      - name: install required bits
-        run: |
-          sudo apt update
-          sudo apt -y install clang-3.6 cmake3 g++-4.8 git
-
-      - name: install other bits
-        if: ${{ matrix.compiler }} == g++-6
-        run: |
-          sudo apt -y install software-properties-common
-          sudo add-apt-repository -y "ppa:ubuntu-toolchain-r/test"
-          sudo apt update
-          sudo apt -y install g++-6
-
-      - name: create build environment
-        run: cmake -E make_directory $GITHUB_WORKSPACE/_build
-
-      - name: configure cmake
-        env:
-          CXX: ${{ matrix.compiler }}
-        shell: bash
-        working-directory: ${{ github.workspace }}/_build
-        run: >
-          cmake $GITHUB_WORKSPACE
-          -DBENCHMARK_ENABLE_TESTING=${{ matrix.run_tests }}
-          -DCMAKE_BUILD_TYPE=${{ matrix.build_type }}
-          -DBENCHMARK_DOWNLOAD_DEPENDENCIES=${{ matrix.run_tests }}
-
-      - name: build
-        shell: bash
-        working-directory: ${{ github.workspace }}/_build
-        run: cmake --build . --config ${{ matrix.build_type }}
-
-      - name: test
-        if: ${{ matrix.run_tests }}
-        shell: bash
-        working-directory: ${{ github.workspace }}/_build
-        run: ctest -C ${{ matrix.build_type }} -VV
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/.github/workflows/pylint.yml b/gnu/llvm/libcxx/utils/google-benchmark/.github/workflows/pylint.yml
deleted file mode 100644
index 0f73a582320..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/.github/workflows/pylint.yml
+++ /dev/null
@@ -1,26 +0,0 @@
-name: pylint
-
-on:
-  push:
-    branches: [ main ]
-  pull_request:
-    branches: [ main ]
-
-jobs:
-  pylint:
-
-    runs-on: ubuntu-latest
-
-    steps:
-    - uses: actions/checkout@v2
-    - name: Set up Python 3.8
-      uses: actions/setup-python@v1
-      with:
-        python-version: 3.8
-    - name: Install dependencies
-      run: |
-        python -m pip install --upgrade pip
-        pip install pylint pylint-exit conan
-    - name: Run pylint
-      run: |
-        pylint `find . -name '*.py'|xargs` || pylint-exit $?
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/.github/workflows/sanitizer.yml b/gnu/llvm/libcxx/utils/google-benchmark/.github/workflows/sanitizer.yml
deleted file mode 100644
index fbc984492df..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/.github/workflows/sanitizer.yml
+++ /dev/null
@@ -1,78 +0,0 @@
-name: sanitizer
-
-on:
-  push: {}
-  pull_request: {}
-
-env:
-  CC: clang
-  CXX: clang++
-  EXTRA_CXX_FLAGS: "-stdlib=libc++"
-  UBSAN_OPTIONS: "print_stacktrace=1"
-
-jobs:
-  job:
-    name: ${{ matrix.sanitizer }}.${{ matrix.build_type }}
-    runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-      matrix:
-        build_type: ['Debug', 'RelWithDebInfo']
-        sanitizer: ['asan', 'ubsan', 'tsan']
-        # TODO: add 'msan' above. currently failing and needs investigation.
-    steps:
-    - uses: actions/checkout@v2
-
-    - name: configure msan env
-      if: matrix.sanitizer == 'msan'
-      run: |
-        echo "EXTRA_FLAGS=-g -O2 -fno-omit-frame-pointer -fsanitize=memory -fsanitize-memory-track-origins" >> $GITHUB_ENV
-        echo "LIBCXX_SANITIZER=MemoryWithOrigins" >> $GITHUB_ENV
-
-    - name: configure ubsan env
-      if: matrix.sanitizer == 'ubsan'
-      run: |
-        echo "EXTRA_FLAGS=-g -O2 -fno-omit-frame-pointer -fsanitize=undefined -fno-sanitize-recover=all" >> $GITHUB_ENV
-        echo "LIBCXX_SANITIZER=Undefined" >> $GITHUB_ENV
-
-    - name: configure asan env
-      if: matrix.sanitizer == 'asan'
-      run: |
-        echo "EXTRA_FLAGS=-g -O2 -fno-omit-frame-pointer -fsanitize=address -fno-sanitize-recover=all" >> $GITHUB_ENV
-        echo "LIBCXX_SANITIZER=Address" >> $GITHUB_ENV
-
-    - name: configure tsan env
-      if: matrix.sanitizer == 'tsan'
-      run: |
-        echo "EXTRA_FLAGS=-g -O2 -fno-omit-frame-pointer -fsanitize=thread -fno-sanitize-recover=all" >> $GITHUB_ENV
-        echo "LIBCXX_SANITIZER=Thread" >> $GITHUB_ENV
-
-    - name: install llvm stuff
-      run: "${GITHUB_WORKSPACE}/.github/.libcxx-setup.sh"
-
-    - name: create build environment
-      run: cmake -E make_directory ${{ runner.workspace }}/_build
-
-    - name: configure cmake
-      shell: bash
-      working-directory: ${{ runner.workspace }}/_build
-      run: >
-        cmake $GITHUB_WORKSPACE
-        -DBENCHMARK_ENABLE_ASSEMBLY_TESTS=OFF
-        -DBENCHMARK_ENABLE_LIBPFM=OFF
-        -DBENCHMARK_DOWNLOAD_DEPENDENCIES=ON
-        -DCMAKE_C_COMPILER=${{ env.CC }}
-        -DCMAKE_CXX_COMPILER=${{ env.CXX }}
-        -DCMAKE_C_FLAGS="${{ env.EXTRA_FLAGS }}"
-        -DCMAKE_CXX_FLAGS="${{ env.EXTRA_FLAGS }} ${{ env.EXTRA_CXX_FLAGS }}"
-        -DCMAKE_BUILD_TYPE=${{ matrix.build_type }}
-
-    - name: build
-      shell: bash
-      working-directory: ${{ runner.workspace }}/_build
-      run: cmake --build . --config ${{ matrix.build_type }}
-
-    - name: test
-      shell: bash
-      working-directory: ${{ runner.workspace }}/_build
-      run: ctest -C ${{ matrix.build_type }} -VV
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/.github/workflows/test_bindings.yml b/gnu/llvm/libcxx/utils/google-benchmark/.github/workflows/test_bindings.yml
deleted file mode 100644
index 4a580ebe047..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/.github/workflows/test_bindings.yml
+++ /dev/null
@@ -1,24 +0,0 @@
-name: test-bindings
-
-on:
-  push:
-    branches: [main]
-  pull_request:
-    branches: [main]
-
-jobs:
-  python_bindings:
-    runs-on: ubuntu-latest
-
-    steps:
-      - uses: actions/checkout@v2
-      - name: Set up Python
-        uses: actions/setup-python@v1
-        with:
-          python-version: 3.8
-      - name: Install benchmark
-        run:
-          python setup.py install
-      - name: Run example bindings
-        run:
-          python bindings/python/google_benchmark/example.py
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/.gitignore b/gnu/llvm/libcxx/utils/google-benchmark/.gitignore
deleted file mode 100644
index 8c30e28f53a..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/.gitignore
+++ /dev/null
@@ -1,58 +0,0 @@
-*.a
-*.so
-*.so.?*
-*.dll
-*.exe
-*.dylib
-*.cmake
-!/cmake/*.cmake
-!/test/AssemblyTests.cmake
-*~
-*.pyc
-__pycache__
-
-# lcov
-*.lcov
-/lcov
-
-# cmake files.
-/Testing
-CMakeCache.txt
-CMakeFiles/
-cmake_install.cmake
-
-# makefiles.
-Makefile
-
-# in-source build.
-bin/
-lib/
-/test/*_test
-
-# exuberant ctags.
-tags
-
-# YouCompleteMe configuration.
-.ycm_extra_conf.pyc
-
-# ninja generated files.
-.ninja_deps
-.ninja_log
-build.ninja
-install_manifest.txt
-rules.ninja
-
-# bazel output symlinks.
-bazel-*
-
-# out-of-source build top-level folders.
-build/
-_build/
-build*/
-
-# in-source dependencies
-/googletest/
-
-# Visual Studio 2015/2017 cache/options directory
-.vs/
-CMakeSettings.json
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/.travis.yml b/gnu/llvm/libcxx/utils/google-benchmark/.travis.yml
deleted file mode 100644
index 4625dfb0878..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/.travis.yml
+++ /dev/null
@@ -1,199 +0,0 @@
-sudo: required
-dist: trusty
-language: cpp
-
-env:
-  global:
-    - /usr/local/bin:$PATH
-
-matrix:
-  include:
-    - compiler: gcc
-      addons:
-        apt:
-          packages:
-            - lcov
-      env: COMPILER=g++ C_COMPILER=gcc BUILD_TYPE=Coverage
-    - compiler: gcc
-      env: COMPILER=g++ C_COMPILER=gcc BUILD_TYPE=Debug
-    - compiler: gcc
-      env: COMPILER=g++ C_COMPILER=gcc BUILD_TYPE=Release
-    - compiler: gcc
-      addons:
-        apt:
-          packages:
-            - g++-multilib
-      env: COMPILER=g++ C_COMPILER=gcc BUILD_TYPE=Debug BUILD_32_BITS=ON
-    - compiler: gcc
-      addons:
-        apt:
-          packages:
-            - g++-multilib
-      env: COMPILER=g++ C_COMPILER=gcc BUILD_TYPE=Release BUILD_32_BITS=ON
-    - compiler: gcc
-      env:
-        - INSTALL_GCC6_FROM_PPA=1
-        - COMPILER=g++-6 C_COMPILER=gcc-6  BUILD_TYPE=Debug
-        - ENABLE_SANITIZER=1
-        - EXTRA_FLAGS="-fno-omit-frame-pointer -g -O2 -fsanitize=undefined,address -fuse-ld=gold"
-    - compiler: clang
-      env: COMPILER=clang++ C_COMPILER=clang BUILD_TYPE=Debug
-    - compiler: clang
-      env: COMPILER=clang++ C_COMPILER=clang BUILD_TYPE=Release
-    # Clang w/ libc++
-    - compiler: clang
-      addons:
-        apt:
-          packages:
-            clang-3.8
-      env:
-        - COMPILER=clang++-3.8 C_COMPILER=clang-3.8 BUILD_TYPE=Debug
-        - LIBCXX_BUILD=1
-        - EXTRA_FLAGS="-stdlib=libc++"
-    - compiler: clang
-      addons:
-        apt:
-          packages:
-            clang-3.8
-      env:
-        - COMPILER=clang++-3.8 C_COMPILER=clang-3.8 BUILD_TYPE=Release
-        - LIBCXX_BUILD=1
-        - EXTRA_FLAGS="-stdlib=libc++"
-    # Clang w/ 32bit libc++
-    - compiler: clang
-      addons:
-        apt:
-          packages:
-            - clang-3.8
-            - g++-multilib
-      env:
-        - COMPILER=clang++-3.8 C_COMPILER=clang-3.8 BUILD_TYPE=Debug
-        - LIBCXX_BUILD=1
-        - BUILD_32_BITS=ON
-        - EXTRA_FLAGS="-stdlib=libc++ -m32"
-    # Clang w/ 32bit libc++
-    - compiler: clang
-      addons:
-        apt:
-          packages:
-            - clang-3.8
-            - g++-multilib
-      env:
-        - COMPILER=clang++-3.8 C_COMPILER=clang-3.8 BUILD_TYPE=Release
-        - LIBCXX_BUILD=1
-        - BUILD_32_BITS=ON
-        - EXTRA_FLAGS="-stdlib=libc++ -m32"
-    # Clang w/ libc++, ASAN, UBSAN
-    - compiler: clang
-      addons:
-        apt:
-          packages:
-            clang-3.8
-      env:
-        - COMPILER=clang++-3.8 C_COMPILER=clang-3.8 BUILD_TYPE=Debug
-        - LIBCXX_BUILD=1 LIBCXX_SANITIZER="Undefined;Address"
-        - ENABLE_SANITIZER=1
-        - EXTRA_FLAGS="-stdlib=libc++ -g -O2 -fno-omit-frame-pointer -fsanitize=undefined,address -fno-sanitize-recover=all"
-        - UBSAN_OPTIONS=print_stacktrace=1
-    # Clang w/ libc++ and MSAN
-    - compiler: clang
-      addons:
-        apt:
-          packages:
-            clang-3.8
-      env:
-        - COMPILER=clang++-3.8 C_COMPILER=clang-3.8 BUILD_TYPE=Debug
-        - LIBCXX_BUILD=1 LIBCXX_SANITIZER=MemoryWithOrigins
-        - ENABLE_SANITIZER=1
-        - EXTRA_FLAGS="-stdlib=libc++ -g -O2 -fno-omit-frame-pointer -fsanitize=memory -fsanitize-memory-track-origins"
-    # Clang w/ libc++ and MSAN
-    - compiler: clang
-      addons:
-        apt:
-          packages:
-            clang-3.8
-      env:
-        - COMPILER=clang++-3.8 C_COMPILER=clang-3.8 BUILD_TYPE=RelWithDebInfo
-        - LIBCXX_BUILD=1 LIBCXX_SANITIZER=Thread
-        - ENABLE_SANITIZER=1
-        - EXTRA_FLAGS="-stdlib=libc++ -g -O2 -fno-omit-frame-pointer -fsanitize=thread -fno-sanitize-recover=all"
-    - os: osx
-      osx_image: xcode8.3
-      compiler: clang
-      env:
-        - COMPILER=clang++ BUILD_TYPE=Debug
-    - os: osx
-      osx_image: xcode8.3
-      compiler: clang
-      env:
-        - COMPILER=clang++ BUILD_TYPE=Release
-    - os: osx
-      osx_image: xcode8.3
-      compiler: clang
-      env:
-        - COMPILER=clang++ BUILD_TYPE=Release BUILD_32_BITS=ON
-    - os: osx
-      osx_image: xcode8.3
-      compiler: gcc
-      env:
-        - COMPILER=g++-7 C_COMPILER=gcc-7  BUILD_TYPE=Debug
-
-before_script:
-  - if [ -n "${LIBCXX_BUILD}" ]; then
-      source .travis-libcxx-setup.sh;
-    fi
-  - if [ -n "${ENABLE_SANITIZER}" ]; then
-      export EXTRA_OPTIONS="-DBENCHMARK_ENABLE_ASSEMBLY_TESTS=OFF";
-    else
-      export EXTRA_OPTIONS="";
-    fi
-  - mkdir -p build && cd build
-
-before_install:
-  - if [ -z "$BUILD_32_BITS" ]; then
-      export BUILD_32_BITS=OFF && echo disabling 32 bit build;
-    fi
-  - if [ -n "${INSTALL_GCC6_FROM_PPA}" ]; then
-      sudo add-apt-repository -y "ppa:ubuntu-toolchain-r/test";
-      sudo apt-get update --option Acquire::Retries=100 --option Acquire::http::Timeout="60";
-    fi
-
-install:
-  - if [ -n "${INSTALL_GCC6_FROM_PPA}" ]; then
-      travis_wait sudo -E apt-get -yq --no-install-suggests --no-install-recommends install g++-6;
-    fi
-  - if [ "${TRAVIS_OS_NAME}" == "linux" -a "${BUILD_32_BITS}" == "OFF" ]; then
-      travis_wait sudo -E apt-get -y --no-install-suggests --no-install-recommends install llvm-3.9-tools;
-      sudo cp /usr/lib/llvm-3.9/bin/FileCheck /usr/local/bin/;
-    fi
-  - if [ "${BUILD_TYPE}" == "Coverage" -a "${TRAVIS_OS_NAME}" == "linux" ]; then
-      PATH=~/.local/bin:${PATH};
-      pip install --user --upgrade pip;
-      travis_wait pip install --user cpp-coveralls;
-    fi
-  - if [ "${C_COMPILER}" == "gcc-7" -a "${TRAVIS_OS_NAME}" == "osx" ]; then
-      rm -f /usr/local/include/c++;
-      brew update;
-      travis_wait brew install gcc@7;
-    fi
-  - if [ "${TRAVIS_OS_NAME}" == "linux" ]; then
-      sudo apt-get update -qq;
-      sudo apt-get install -qq unzip;
-      wget https://github.com/bazelbuild/bazel/releases/download/0.10.1/bazel-0.10.1-installer-linux-x86_64.sh --output-document bazel-installer.sh;
-      travis_wait sudo bash bazel-installer.sh;
-    fi
-  - if [ "${TRAVIS_OS_NAME}" == "osx" ]; then
-      curl -L -o bazel-installer.sh https://github.com/bazelbuild/bazel/releases/download/0.10.1/bazel-0.10.1-installer-darwin-x86_64.sh;
-      travis_wait sudo bash bazel-installer.sh;
-    fi
-
-script:
-  - cmake -DCMAKE_C_COMPILER=${C_COMPILER} -DCMAKE_CXX_COMPILER=${COMPILER} -DCMAKE_BUILD_TYPE=${BUILD_TYPE} -DCMAKE_CXX_FLAGS="${EXTRA_FLAGS}" -DBENCHMARK_DOWNLOAD_DEPENDENCIES=ON -DBENCHMARK_BUILD_32_BITS=${BUILD_32_BITS} ${EXTRA_OPTIONS} ..
-  - make
-  - ctest -C ${BUILD_TYPE} --output-on-failure
-  - bazel test -c dbg --define google_benchmark.have_regex=posix --announce_rc --verbose_failures --test_output=errors --keep_going //test/...
-
-after_success:
-  - if [ "${BUILD_TYPE}" == "Coverage" -a "${TRAVIS_OS_NAME}" == "linux" ]; then
-      coveralls --include src --include include --gcov-options '\-lp' --root .. --build-root .;
-    fi
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/.ycm_extra_conf.py b/gnu/llvm/libcxx/utils/google-benchmark/.ycm_extra_conf.py
deleted file mode 100644
index 5649ddcc749..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/.ycm_extra_conf.py
+++ /dev/null
@@ -1,115 +0,0 @@
-import os
-import ycm_core
-
-# These are the compilation flags that will be used in case there's no
-# compilation database set (by default, one is not set).
-# CHANGE THIS LIST OF FLAGS. YES, THIS IS THE DROID YOU HAVE BEEN LOOKING FOR.
-flags = [
-'-Wall',
-'-Werror',
-'-pedantic-errors',
-'-std=c++0x',
-'-fno-strict-aliasing',
-'-O3',
-'-DNDEBUG',
-# ...and the same thing goes for the magic -x option which specifies the
-# language that the files to be compiled are written in. This is mostly
-# relevant for c++ headers.
-# For a C project, you would set this to 'c' instead of 'c++'.
-'-x', 'c++',
-'-I', 'include',
-'-isystem', '/usr/include',
-'-isystem', '/usr/local/include',
-]
-
-
-# Set this to the absolute path to the folder (NOT the file!) containing the
-# compile_commands.json file to use that instead of 'flags'. See here for
-# more details: http://clang.llvm.org/docs/JSONCompilationDatabase.html
-#
-# Most projects will NOT need to set this to anything; you can just change the
-# 'flags' list of compilation flags. Notice that YCM itself uses that approach.
-compilation_database_folder = ''
-
-if os.path.exists( compilation_database_folder ):
-  database = ycm_core.CompilationDatabase( compilation_database_folder )
-else:
-  database = None
-
-SOURCE_EXTENSIONS = [ '.cc' ]
-
-def DirectoryOfThisScript():
-  return os.path.dirname( os.path.abspath( __file__ ) )
-
-
-def MakeRelativePathsInFlagsAbsolute( flags, working_directory ):
-  if not working_directory:
-    return list( flags )
-  new_flags = []
-  make_next_absolute = False
-  path_flags = [ '-isystem', '-I', '-iquote', '--sysroot=' ]
-  for flag in flags:
-    new_flag = flag
-
-    if make_next_absolute:
-      make_next_absolute = False
-      if not flag.startswith( '/' ):
-        new_flag = os.path.join( working_directory, flag )
-
-    for path_flag in path_flags:
-      if flag == path_flag:
-        make_next_absolute = True
-        break
-
-      if flag.startswith( path_flag ):
-        path = flag[ len( path_flag ): ]
-        new_flag = path_flag + os.path.join( working_directory, path )
-        break
-
-    if new_flag:
-      new_flags.append( new_flag )
-  return new_flags
-
-
-def IsHeaderFile( filename ):
-  extension = os.path.splitext( filename )[ 1 ]
-  return extension in [ '.h', '.hxx', '.hpp', '.hh' ]
-
-
-def GetCompilationInfoForFile( filename ):
-  # The compilation_commands.json file generated by CMake does not have entries
-  # for header files. So we do our best by asking the db for flags for a
-  # corresponding source file, if any. If one exists, the flags for that file
-  # should be good enough.
-  if IsHeaderFile( filename ):
-    basename = os.path.splitext( filename )[ 0 ]
-    for extension in SOURCE_EXTENSIONS:
-      replacement_file = basename + extension
-      if os.path.exists( replacement_file ):
-        compilation_info = database.GetCompilationInfoForFile(
-          replacement_file )
-        if compilation_info.compiler_flags_:
-          return compilation_info
-    return None
-  return database.GetCompilationInfoForFile( filename )
-
-
-def FlagsForFile( filename, **kwargs ):
-  if database:
-    # Bear in mind that compilation_info.compiler_flags_ does NOT return a
-    # python list, but a "list-like" StringVec object
-    compilation_info = GetCompilationInfoForFile( filename )
-    if not compilation_info:
-      return None
-
-    final_flags = MakeRelativePathsInFlagsAbsolute(
-      compilation_info.compiler_flags_,
-      compilation_info.compiler_working_dir_ )
-  else:
-    relative_to = DirectoryOfThisScript()
-    final_flags = MakeRelativePathsInFlagsAbsolute( flags, relative_to )
-
-  return {
-    'flags': final_flags,
-    'do_cache': True
-  }
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/AUTHORS b/gnu/llvm/libcxx/utils/google-benchmark/AUTHORS
deleted file mode 100644
index 09e2e0551ad..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/AUTHORS
+++ /dev/null
@@ -1,48 +0,0 @@
-# This is the official list of benchmark authors for copyright purposes.
-# This file is distinct from the CONTRIBUTORS files.
-# See the latter for an explanation.
-#
-# Names should be added to this file as:
-#	Name or Organization <email address>
-# The email address is not required for organizations.
-#
-# Please keep the list sorted.
-
-Albert Pretorius <pretoalb@gmail.com>
-Arne Beer <arne@twobeer.de>
-Carto
-Christopher Seymour <chris.j.seymour@hotmail.com>
-David Coeurjolly <david.coeurjolly@liris.cnrs.fr>
-Deniz Evrenci <denizevrenci@gmail.com>
-Dirac Research 
-Dominik Czarnota <dominik.b.czarnota@gmail.com>
-Eric Fiselier <eric@efcs.ca>
-Eugene Zhuk <eugene.zhuk@gmail.com>
-Evgeny Safronov <division494@gmail.com>
-Federico Ficarelli <federico.ficarelli@gmail.com>
-Felix Homann <linuxaudio@showlabor.de>
-Google Inc.
-International Business Machines Corporation
-Ismael Jimenez Martinez <ismael.jimenez.martinez@gmail.com>
-Jern-Kuan Leong <jernkuan@gmail.com>
-JianXiong Zhou <zhoujianxiong2@gmail.com>
-Joao Paulo Magalhaes <joaoppmagalhaes@gmail.com>
-Jussi Knuuttila <jussi.knuuttila@gmail.com>
-Kaito Udagawa <umireon@gmail.com>
-Kishan Kumar <kumar.kishan@outlook.com>
-Lei Xu <eddyxu@gmail.com>
-Matt Clarkson <mattyclarkson@gmail.com>
-Maxim Vafin <maxvafin@gmail.com>
-MongoDB Inc.
-Nick Hutchinson <nshutchinson@gmail.com>
-Oleksandr Sochka <sasha.sochka@gmail.com>
-Ori Livneh <ori.livneh@gmail.com>
-Paul Redmond <paul.redmond@gmail.com>
-Radoslav Yovchev <radoslav.tm@gmail.com>
-Roman Lebedev <lebedev.ri@gmail.com>
-Shuo Chen <chenshuo@chenshuo.com>
-Steinar H. Gunderson <sgunderson@bigfoot.com>
-Stripe, Inc.
-Yixuan Qiu <yixuanq@gmail.com>
-Yusuke Suzuki <utatane.tea@gmail.com>
-Zbigniew Skowron <zbychs@gmail.com>
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/BUILD.bazel b/gnu/llvm/libcxx/utils/google-benchmark/BUILD.bazel
deleted file mode 100644
index eb35b62730c..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/BUILD.bazel
+++ /dev/null
@@ -1,44 +0,0 @@
-load("@rules_cc//cc:defs.bzl", "cc_library")
-
-licenses(["notice"])
-
-config_setting(
-    name = "windows",
-    values = {
-        "cpu": "x64_windows",
-    },
-    visibility = [":__subpackages__"],
-)
-
-cc_library(
-    name = "benchmark",
-    srcs = glob(
-        [
-            "src/*.cc",
-            "src/*.h",
-        ],
-        exclude = ["src/benchmark_main.cc"],
-    ),
-    hdrs = ["include/benchmark/benchmark.h"],
-    linkopts = select({
-        ":windows": ["-DEFAULTLIB:shlwapi.lib"],
-        "//conditions:default": ["-pthread"],
-    }),
-    strip_include_prefix = "include",
-    visibility = ["//visibility:public"],
-)
-
-cc_library(
-    name = "benchmark_main",
-    srcs = ["src/benchmark_main.cc"],
-    hdrs = ["include/benchmark/benchmark.h"],
-    strip_include_prefix = "include",
-    visibility = ["//visibility:public"],
-    deps = [":benchmark"],
-)
-
-cc_library(
-    name = "benchmark_internal_headers",
-    hdrs = glob(["src/*.h"]),
-    visibility = ["//test:__pkg__"],
-)
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/CMakeLists.txt b/gnu/llvm/libcxx/utils/google-benchmark/CMakeLists.txt
deleted file mode 100644
index 310c7ee9f6b..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/CMakeLists.txt
+++ /dev/null
@@ -1,267 +0,0 @@
-cmake_minimum_required (VERSION 2.8.12)
-
-project (benchmark)
-
-foreach(p
-    CMP0054 # CMake 3.1
-    CMP0056 # export EXE_LINKER_FLAGS to try_run
-    CMP0057 # Support no if() IN_LIST operator
-    )
-  if(POLICY ${p})
-    cmake_policy(SET ${p} NEW)
-  endif()
-endforeach()
-
-option(BENCHMARK_ENABLE_TESTING "Enable testing of the benchmark library." ON)
-option(BENCHMARK_ENABLE_EXCEPTIONS "Enable the use of exceptions in the benchmark library." ON)
-option(BENCHMARK_ENABLE_LTO "Enable link time optimisation of the benchmark library." OFF)
-option(BENCHMARK_USE_LIBCXX "Build and test using libc++ as the standard library." OFF)
-if(NOT MSVC)
-  option(BENCHMARK_BUILD_32_BITS "Build a 32 bit version of the library." OFF)
-else()
-  set(BENCHMARK_BUILD_32_BITS OFF CACHE BOOL "Build a 32 bit version of the library - unsupported when using MSVC)" FORCE)
-endif()
-option(BENCHMARK_ENABLE_INSTALL "Enable installation of benchmark. (Projects embedding benchmark may want to turn this OFF.)" ON)
-
-# Allow unmet dependencies to be met using CMake's ExternalProject mechanics, which
-# may require downloading the source code.
-option(BENCHMARK_DOWNLOAD_DEPENDENCIES "Allow the downloading and in-tree building of unmet dependencies" OFF)
-
-# This option can be used to disable building and running unit tests which depend on gtest
-# in cases where it is not possible to build or find a valid version of gtest.
-option(BENCHMARK_ENABLE_GTEST_TESTS "Enable building the unit tests which depend on gtest" ON)
-
-set(ENABLE_ASSEMBLY_TESTS_DEFAULT OFF)
-function(should_enable_assembly_tests)
-  if(CMAKE_BUILD_TYPE)
-    string(TOLOWER ${CMAKE_BUILD_TYPE} CMAKE_BUILD_TYPE_LOWER)
-    if (${CMAKE_BUILD_TYPE_LOWER} MATCHES "coverage")
-      # FIXME: The --coverage flag needs to be removed when building assembly
-      # tests for this to work.
-      return()
-    endif()
-  endif()
-  if (MSVC)
-    return()
-  elseif(NOT CMAKE_SYSTEM_PROCESSOR MATCHES "x86_64")
-    return()
-  elseif(NOT CMAKE_SIZEOF_VOID_P EQUAL 8)
-    # FIXME: Make these work on 32 bit builds
-    return()
-  elseif(BENCHMARK_BUILD_32_BITS)
-     # FIXME: Make these work on 32 bit builds
-    return()
-  endif()
-  find_program(LLVM_FILECHECK_EXE FileCheck)
-  if (LLVM_FILECHECK_EXE)
-    set(LLVM_FILECHECK_EXE "${LLVM_FILECHECK_EXE}" CACHE PATH "llvm filecheck" FORCE)
-    message(STATUS "LLVM FileCheck Found: ${LLVM_FILECHECK_EXE}")
-  else()
-    message(STATUS "Failed to find LLVM FileCheck")
-    return()
-  endif()
-  set(ENABLE_ASSEMBLY_TESTS_DEFAULT ON PARENT_SCOPE)
-endfunction()
-should_enable_assembly_tests()
-
-# This option disables the building and running of the assembly verification tests
-option(BENCHMARK_ENABLE_ASSEMBLY_TESTS "Enable building and running the assembly tests"
-    ${ENABLE_ASSEMBLY_TESTS_DEFAULT})
-
-# Make sure we can import out CMake functions
-list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules")
-list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
-
-
-# Read the git tags to determine the project version
-include(GetGitVersion)
-get_git_version(GIT_VERSION)
-
-# Tell the user what versions we are using
-string(REGEX MATCH "[0-9]+\\.[0-9]+\\.[0-9]+" VERSION ${GIT_VERSION})
-message(STATUS "Version: ${VERSION}")
-
-# The version of the libraries
-set(GENERIC_LIB_VERSION ${VERSION})
-string(SUBSTRING ${VERSION} 0 1 GENERIC_LIB_SOVERSION)
-
-# Import our CMake modules
-include(CheckCXXCompilerFlag)
-include(AddCXXCompilerFlag)
-include(CXXFeatureCheck)
-
-if (BENCHMARK_BUILD_32_BITS)
-  add_required_cxx_compiler_flag(-m32)
-endif()
-
-if (MSVC)
-  # Turn compiler warnings up to 11
-  string(REGEX REPLACE "[-/]W[1-4]" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /W4")
-  add_definitions(-D_CRT_SECURE_NO_WARNINGS)
-
-  if (NOT BENCHMARK_ENABLE_EXCEPTIONS)
-    add_cxx_compiler_flag(-EHs-)
-    add_cxx_compiler_flag(-EHa-)
-    add_definitions(-D_HAS_EXCEPTIONS=0)
-  endif()
-  # Link time optimisation
-  if (BENCHMARK_ENABLE_LTO)
-    set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /GL")
-    set(CMAKE_STATIC_LINKER_FLAGS_RELEASE "${CMAKE_STATIC_LINKER_FLAGS_RELEASE} /LTCG")
-    set(CMAKE_SHARED_LINKER_FLAGS_RELEASE "${CMAKE_SHARED_LINKER_FLAGS_RELEASE} /LTCG")
-    set(CMAKE_EXE_LINKER_FLAGS_RELEASE "${CMAKE_EXE_LINKER_FLAGS_RELEASE} /LTCG")
-
-    set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO} /GL")
-    string(REGEX REPLACE "[-/]INCREMENTAL" "/INCREMENTAL:NO" CMAKE_STATIC_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_STATIC_LINKER_FLAGS_RELWITHDEBINFO}")
-    set(CMAKE_STATIC_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_STATIC_LINKER_FLAGS_RELWITHDEBINFO} /LTCG")
-    string(REGEX REPLACE "[-/]INCREMENTAL" "/INCREMENTAL:NO" CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO}")
-    set(CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO} /LTCG")
-    string(REGEX REPLACE "[-/]INCREMENTAL" "/INCREMENTAL:NO" CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO}")
-    set(CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO "${CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO} /LTCG")
-
-    set(CMAKE_CXX_FLAGS_MINSIZEREL "${CMAKE_CXX_FLAGS_MINSIZEREL} /GL")
-    set(CMAKE_STATIC_LINKER_FLAGS_MINSIZEREL "${CMAKE_STATIC_LINKER_FLAGS_MINSIZEREL} /LTCG")
-    set(CMAKE_SHARED_LINKER_FLAGS_MINSIZEREL "${CMAKE_SHARED_LINKER_FLAGS_MINSIZEREL} /LTCG")
-    set(CMAKE_EXE_LINKER_FLAGS_MINSIZEREL "${CMAKE_EXE_LINKER_FLAGS_MINSIZEREL} /LTCG")
-  endif()
-else()
-  # Try and enable C++11. Don't use C++14 because it doesn't work in some
-  # configurations.
-  add_cxx_compiler_flag(-std=c++11)
-  if (NOT HAVE_CXX_FLAG_STD_CXX11)
-    add_cxx_compiler_flag(-std=c++0x)
-  endif()
-
-  # Turn compiler warnings up to 11
-  add_cxx_compiler_flag(-Wall)
-  add_cxx_compiler_flag(-Wextra)
-  add_cxx_compiler_flag(-Wshadow)
-  add_cxx_compiler_flag(-Werror RELEASE)
-  add_cxx_compiler_flag(-Werror RELWITHDEBINFO)
-  add_cxx_compiler_flag(-Werror MINSIZEREL)
-  add_cxx_compiler_flag(-pedantic)
-  add_cxx_compiler_flag(-pedantic-errors)
-  add_cxx_compiler_flag(-Wshorten-64-to-32)
-  add_cxx_compiler_flag(-fstrict-aliasing)
-  # Disable warnings regarding deprecated parts of the library while building
-  # and testing those parts of the library.
-  add_cxx_compiler_flag(-Wno-deprecated-declarations)
-  if (CMAKE_CXX_COMPILER_ID STREQUAL "Intel")
-    # Intel silently ignores '-Wno-deprecated-declarations',
-    # warning no. 1786 must be explicitly disabled.
-    # See #631 for rationale.
-    add_cxx_compiler_flag(-wd1786)
-  endif()
-  # Disable deprecation warnings for release builds (when -Werror is enabled).
-  add_cxx_compiler_flag(-Wno-deprecated RELEASE)
-  add_cxx_compiler_flag(-Wno-deprecated RELWITHDEBINFO)
-  add_cxx_compiler_flag(-Wno-deprecated MINSIZEREL)
-  if (NOT BENCHMARK_ENABLE_EXCEPTIONS)
-    add_cxx_compiler_flag(-fno-exceptions)
-  endif()
-
-  if (HAVE_CXX_FLAG_FSTRICT_ALIASING)
-    if (NOT CMAKE_CXX_COMPILER_ID STREQUAL "Intel") #ICC17u2: Many false positives for Wstrict-aliasing
-      add_cxx_compiler_flag(-Wstrict-aliasing)
-    endif()
-  endif()
-  # ICC17u2: overloaded virtual function "benchmark::Fixture::SetUp" is only partially overridden
-  # (because of deprecated overload)
-  add_cxx_compiler_flag(-wd654)
-  add_cxx_compiler_flag(-Wthread-safety)
-  if (HAVE_CXX_FLAG_WTHREAD_SAFETY)
-    cxx_feature_check(THREAD_SAFETY_ATTRIBUTES)
-  endif()
-
-  # On most UNIX like platforms g++ and clang++ define _GNU_SOURCE as a
-  # predefined macro, which turns on all of the wonderful libc extensions.
-  # However g++ doesn't do this in Cygwin so we have to define it ourselfs
-  # since we depend on GNU/POSIX/BSD extensions.
-  if (CYGWIN)
-    add_definitions(-D_GNU_SOURCE=1)
-  endif()
-
-  # Link time optimisation
-  if (BENCHMARK_ENABLE_LTO)
-    add_cxx_compiler_flag(-flto)
-    if ("${CMAKE_C_COMPILER_ID}" STREQUAL "GNU")
-      find_program(GCC_AR gcc-ar)
-      if (GCC_AR)
-        set(CMAKE_AR ${GCC_AR})
-      endif()
-      find_program(GCC_RANLIB gcc-ranlib)
-      if (GCC_RANLIB)
-        set(CMAKE_RANLIB ${GCC_RANLIB})
-      endif()
-    elseif("${CMAKE_C_COMPILER_ID}" MATCHES "Clang")
-      include(llvm-toolchain)
-    endif()
-  endif()
-
-  # Coverage build type
-  set(BENCHMARK_CXX_FLAGS_COVERAGE "${CMAKE_CXX_FLAGS_DEBUG}"
-    CACHE STRING "Flags used by the C++ compiler during coverage builds."
-    FORCE)
-  set(BENCHMARK_EXE_LINKER_FLAGS_COVERAGE "${CMAKE_EXE_LINKER_FLAGS_DEBUG}"
-    CACHE STRING "Flags used for linking binaries during coverage builds."
-    FORCE)
-  set(BENCHMARK_SHARED_LINKER_FLAGS_COVERAGE "${CMAKE_SHARED_LINKER_FLAGS_DEBUG}"
-    CACHE STRING "Flags used by the shared libraries linker during coverage builds."
-    FORCE)
-  mark_as_advanced(
-    BENCHMARK_CXX_FLAGS_COVERAGE
-    BENCHMARK_EXE_LINKER_FLAGS_COVERAGE
-    BENCHMARK_SHARED_LINKER_FLAGS_COVERAGE)
-  set(CMAKE_BUILD_TYPE "${CMAKE_BUILD_TYPE}" CACHE STRING
-    "Choose the type of build, options are: None Debug Release RelWithDebInfo MinSizeRel Coverage.")
-  add_cxx_compiler_flag(--coverage COVERAGE)
-endif()
-
-if (BENCHMARK_USE_LIBCXX)
-  if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
-    add_cxx_compiler_flag(-stdlib=libc++)
-  elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU" OR
-          "${CMAKE_CXX_COMPILER_ID}" STREQUAL "Intel")
-    add_cxx_compiler_flag(-nostdinc++)
-    message(WARNING "libc++ header path must be manually specified using CMAKE_CXX_FLAGS")
-    # Adding -nodefaultlibs directly to CMAKE_<TYPE>_LINKER_FLAGS will break
-    # configuration checks such as 'find_package(Threads)'
-    list(APPEND BENCHMARK_CXX_LINKER_FLAGS -nodefaultlibs)
-    # -lc++ cannot be added directly to CMAKE_<TYPE>_LINKER_FLAGS because
-    # linker flags appear before all linker inputs and -lc++ must appear after.
-    list(APPEND BENCHMARK_CXX_LIBRARIES c++)
-  else()
-    message(FATAL_ERROR "-DBENCHMARK_USE_LIBCXX:BOOL=ON is not supported for compiler")
-  endif()
-endif(BENCHMARK_USE_LIBCXX)
-
-# C++ feature checks
-# Determine the correct regular expression engine to use
-cxx_feature_check(STD_REGEX)
-cxx_feature_check(GNU_POSIX_REGEX)
-cxx_feature_check(POSIX_REGEX)
-if(NOT HAVE_STD_REGEX AND NOT HAVE_GNU_POSIX_REGEX AND NOT HAVE_POSIX_REGEX)
-  message(FATAL_ERROR "Failed to determine the source files for the regular expression backend")
-endif()
-if (NOT BENCHMARK_ENABLE_EXCEPTIONS AND HAVE_STD_REGEX
-        AND NOT HAVE_GNU_POSIX_REGEX AND NOT HAVE_POSIX_REGEX)
-  message(WARNING "Using std::regex with exceptions disabled is not fully supported")
-endif()
-cxx_feature_check(STEADY_CLOCK)
-# Ensure we have pthreads
-find_package(Threads REQUIRED)
-
-# Set up directories
-include_directories(${PROJECT_SOURCE_DIR}/include)
-
-# Build the targets
-add_subdirectory(src)
-
-if (BENCHMARK_ENABLE_TESTING)
-  enable_testing()
-  if (BENCHMARK_ENABLE_GTEST_TESTS)
-    include(HandleGTest)
-  endif()
-  add_subdirectory(test)
-endif()
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/CONTRIBUTING.md b/gnu/llvm/libcxx/utils/google-benchmark/CONTRIBUTING.md
deleted file mode 100644
index 43de4c9d470..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/CONTRIBUTING.md
+++ /dev/null
@@ -1,58 +0,0 @@
-# How to contribute #
-
-We'd love to accept your patches and contributions to this project.  There are
-a just a few small guidelines you need to follow.
-
-
-## Contributor License Agreement ##
-
-Contributions to any Google project must be accompanied by a Contributor
-License Agreement.  This is not a copyright **assignment**, it simply gives
-Google permission to use and redistribute your contributions as part of the
-project.
-
-  * If you are an individual writing original source code and you're sure you
-    own the intellectual property, then you'll need to sign an [individual
-    CLA][].
-
-  * If you work for a company that wants to allow you to contribute your work,
-    then you'll need to sign a [corporate CLA][].
-
-You generally only need to submit a CLA once, so if you've already submitted
-one (even if it was for a different project), you probably don't need to do it
-again.
-
-[individual CLA]: https://developers.google.com/open-source/cla/individual
-[corporate CLA]: https://developers.google.com/open-source/cla/corporate
-
-Once your CLA is submitted (or if you already submitted one for
-another Google project), make a commit adding yourself to the
-[AUTHORS][] and [CONTRIBUTORS][] files. This commit can be part
-of your first [pull request][].
-
-[AUTHORS]: AUTHORS
-[CONTRIBUTORS]: CONTRIBUTORS
-
-
-## Submitting a patch ##
-
-  1. It's generally best to start by opening a new issue describing the bug or
-     feature you're intending to fix.  Even if you think it's relatively minor,
-     it's helpful to know what people are working on.  Mention in the initial
-     issue that you are planning to work on that bug or feature so that it can
-     be assigned to you.
-
-  1. Follow the normal process of [forking][] the project, and setup a new
-     branch to work in.  It's important that each group of changes be done in
-     separate branches in order to ensure that a pull request only includes the
-     commits related to that bug or feature.
-
-  1. Do your best to have [well-formed commit messages][] for each change.
-     This provides consistency throughout the project, and ensures that commit
-     messages are able to be formatted properly by various git tools.
-
-  1. Finally, push the commits to your fork and submit a [pull request][].
-
-[forking]: https://help.github.com/articles/fork-a-repo
-[well-formed commit messages]: http://tbaggery.com/2008/04/19/a-note-about-git-commit-messages.html
-[pull request]: https://help.github.com/articles/creating-a-pull-request
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/CONTRIBUTORS b/gnu/llvm/libcxx/utils/google-benchmark/CONTRIBUTORS
deleted file mode 100644
index ee74ff886c0..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/CONTRIBUTORS
+++ /dev/null
@@ -1,68 +0,0 @@
-# People who have agreed to one of the CLAs and can contribute patches.
-# The AUTHORS file lists the copyright holders; this file
-# lists people.  For example, Google employees are listed here
-# but not in AUTHORS, because Google holds the copyright.
-#
-# Names should be added to this file only after verifying that
-# the individual or the individual's organization has agreed to
-# the appropriate Contributor License Agreement, found here:
-#
-# https://developers.google.com/open-source/cla/individual
-# https://developers.google.com/open-source/cla/corporate
-#
-# The agreement for individuals can be filled out on the web.
-#
-# When adding J Random Contributor's name to this file,
-# either J's name or J's organization's name should be
-# added to the AUTHORS file, depending on whether the
-# individual or corporate CLA was used.
-#
-# Names should be added to this file as:
-#     Name <email address>
-#
-# Please keep the list sorted.
-
-Albert Pretorius <pretoalb@gmail.com>
-Arne Beer <arne@twobeer.de>
-Billy Robert O'Neal III <billy.oneal@gmail.com> <bion@microsoft.com>
-Chris Kennelly <ckennelly@google.com> <ckennelly@ckennelly.com>
-Christopher Seymour <chris.j.seymour@hotmail.com>
-Cyrille Faucheux <cyrille.faucheux@gmail.com>
-David Coeurjolly <david.coeurjolly@liris.cnrs.fr>
-Deniz Evrenci <denizevrenci@gmail.com>
-Dominic Hamon <dma@stripysock.com> <dominic@google.com>
-Dominik Czarnota <dominik.b.czarnota@gmail.com>
-Eric Fiselier <eric@efcs.ca>
-Eugene Zhuk <eugene.zhuk@gmail.com>
-Evgeny Safronov <division494@gmail.com>
-Federico Ficarelli <federico.ficarelli@gmail.com>
-Felix Homann <linuxaudio@showlabor.de>
-Ismael Jimenez Martinez <ismael.jimenez.martinez@gmail.com>
-Jern-Kuan Leong <jernkuan@gmail.com>
-JianXiong Zhou <zhoujianxiong2@gmail.com>
-Joao Paulo Magalhaes <joaoppmagalhaes@gmail.com>
-John Millikin <jmillikin@stripe.com>
-Jussi Knuuttila <jussi.knuuttila@gmail.com>
-Kai Wolf <kai.wolf@gmail.com>
-Kishan Kumar <kumar.kishan@outlook.com>
-Kaito Udagawa <umireon@gmail.com>
-Lei Xu <eddyxu@gmail.com>
-Matt Clarkson <mattyclarkson@gmail.com>
-Maxim Vafin <maxvafin@gmail.com>
-Nick Hutchinson <nshutchinson@gmail.com>
-Oleksandr Sochka <sasha.sochka@gmail.com>
-Ori Livneh <ori.livneh@gmail.com>
-Pascal Leroy <phl@google.com>
-Paul Redmond <paul.redmond@gmail.com>
-Pierre Phaneuf <pphaneuf@google.com>
-Radoslav Yovchev <radoslav.tm@gmail.com>
-Raul Marin <rmrodriguez@cartodb.com>
-Ray Glover <ray.glover@uk.ibm.com>
-Robert Guo <robert.guo@mongodb.com>
-Roman Lebedev <lebedev.ri@gmail.com>
-Shuo Chen <chenshuo@chenshuo.com>
-Tobias Ulvgård <tobias.ulvgard@dirac.se>
-Tom Madams <tom.ej.madams@gmail.com> <tmadams@google.com>
-Yixuan Qiu <yixuanq@gmail.com>
-Yusuke Suzuki <utatane.tea@gmail.com>
-Zbigniew Skowron <zbychs@gmail.com>
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/LICENSE b/gnu/llvm/libcxx/utils/google-benchmark/LICENSE
deleted file mode 100644
index d6456956733..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/LICENSE
+++ /dev/null
@@ -1,202 +0,0 @@
-
-                                 Apache License
-                           Version 2.0, January 2004
-                        http://www.apache.org/licenses/
-
-   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
-
-   1. Definitions.
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-      "License" shall mean the terms and conditions for use, reproduction,
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diff --git a/gnu/llvm/libcxx/utils/google-benchmark/README.md b/gnu/llvm/libcxx/utils/google-benchmark/README.md
deleted file mode 100644
index 858ea2334ef..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/README.md
+++ /dev/null
@@ -1,998 +0,0 @@
-# benchmark
-[![Build Status](https://travis-ci.org/google/benchmark.svg?branch=master)](https://travis-ci.org/google/benchmark)
-[![Build status](https://ci.appveyor.com/api/projects/status/u0qsyp7t1tk7cpxs/branch/master?svg=true)](https://ci.appveyor.com/project/google/benchmark/branch/master)
-[![Coverage Status](https://coveralls.io/repos/google/benchmark/badge.svg)](https://coveralls.io/r/google/benchmark)
-[![slackin](https://slackin-iqtfqnpzxd.now.sh/badge.svg)](https://slackin-iqtfqnpzxd.now.sh/)
-
-A library to support the benchmarking of functions, similar to unit-tests.
-
-[Discussion group](https://groups.google.com/d/forum/benchmark-discuss)
-
-IRC channel: [freenode](https://freenode.net) #googlebenchmark
-
-[Additional Tooling Documentation](docs/tools.md)
-
-[Assembly Testing Documentation](docs/AssemblyTests.md)
-
-
-## Building
-
-The basic steps for configuring and building the library look like this:
-
-```bash
-$ git clone https://github.com/google/benchmark.git
-# Benchmark requires Google Test as a dependency. Add the source tree as a subdirectory.
-$ git clone https://github.com/google/googletest.git benchmark/googletest
-$ mkdir build && cd build
-$ cmake -G <generator> [options] ../benchmark
-# Assuming a makefile generator was used
-$ make
-```
-
-Note that Google Benchmark requires Google Test to build and run the tests. This
-dependency can be provided two ways:
-
-* Checkout the Google Test sources into `benchmark/googletest` as above.
-* Otherwise, if `-DBENCHMARK_DOWNLOAD_DEPENDENCIES=ON` is specified during
-  configuration, the library will automatically download and build any required
-  dependencies.
-
-If you do not wish to build and run the tests, add `-DBENCHMARK_ENABLE_GTEST_TESTS=OFF`
-to `CMAKE_ARGS`.
-
-
-## Installation Guide
-
-For Ubuntu and Debian Based System
-
-First make sure you have git and cmake installed (If not please install them)
-
-```
-sudo apt-get install git cmake
-```
-
-Now, let's clone the repository and build it
-
-```
-git clone https://github.com/google/benchmark.git
-cd benchmark
-# If you want to build tests and don't use BENCHMARK_DOWNLOAD_DEPENDENCIES, then
-# git clone https://github.com/google/googletest.git
-mkdir build
-cd build
-cmake .. -DCMAKE_BUILD_TYPE=RELEASE
-make
-```
-
-If you need to install the library globally
-
-```
-sudo make install
-```
-
-## Stable and Experimental Library Versions
-
-The main branch contains the latest stable version of the benchmarking library;
-the API of which can be considered largely stable, with source breaking changes
-being made only upon the release of a new major version.
-
-Newer, experimental, features are implemented and tested on the
-[`v2` branch](https://github.com/google/benchmark/tree/v2). Users who wish
-to use, test, and provide feedback on the new features are encouraged to try
-this branch. However, this branch provides no stability guarantees and reserves
-the right to change and break the API at any time.
-
-## Further knowledge
-
-It may help to read the [Google Test documentation](https://github.com/google/googletest/blob/master/googletest/docs/primer.md)
-as some of the structural aspects of the APIs are similar.
-
-## Example usage
-### Basic usage
-Define a function that executes the code to be measured, register it as a
-benchmark function using the `BENCHMARK` macro, and ensure an appropriate `main`
-function is available:
-
-```c++
-#include <benchmark/benchmark.h>
-
-static void BM_StringCreation(benchmark::State& state) {
-  for (auto _ : state)
-    std::string empty_string;
-}
-// Register the function as a benchmark
-BENCHMARK(BM_StringCreation);
-
-// Define another benchmark
-static void BM_StringCopy(benchmark::State& state) {
-  std::string x = "hello";
-  for (auto _ : state)
-    std::string copy(x);
-}
-BENCHMARK(BM_StringCopy);
-
-BENCHMARK_MAIN();
-```
-
-Don't forget to inform your linker to add benchmark library e.g. through 
-`-lbenchmark` compilation flag. Alternatively, you may leave out the 
-`BENCHMARK_MAIN();` at the end of the source file and link against 
-`-lbenchmark_main` to get the same default behavior.
-
-The benchmark library will measure and report the timing for code within the
-`for(...)` loop.
-
-#### Platform-specific libraries
-When the library is built using GCC it is necessary to link with the pthread
-library due to how GCC implements `std::thread`. Failing to link to pthread will
-lead to runtime exceptions (unless you're using libc++), not linker errors. See
-[issue #67](https://github.com/google/benchmark/issues/67) for more details. You
-can link to pthread by adding `-pthread` to your linker command. Note, you can
-also use `-lpthread`, but there are potential issues with ordering of command
-line parameters if you use that.
-
-If you're running benchmarks on Windows, the shlwapi library (`-lshlwapi`) is
-also required.
-
-If you're running benchmarks on solaris, you'll want the kstat library linked in
-too (`-lkstat`).
-
-### Passing arguments
-Sometimes a family of benchmarks can be implemented with just one routine that
-takes an extra argument to specify which one of the family of benchmarks to
-run. For example, the following code defines a family of benchmarks for
-measuring the speed of `memcpy()` calls of different lengths:
-
-```c++
-static void BM_memcpy(benchmark::State& state) {
-  char* src = new char[state.range(0)];
-  char* dst = new char[state.range(0)];
-  memset(src, 'x', state.range(0));
-  for (auto _ : state)
-    memcpy(dst, src, state.range(0));
-  state.SetBytesProcessed(int64_t(state.iterations()) *
-                          int64_t(state.range(0)));
-  delete[] src;
-  delete[] dst;
-}
-BENCHMARK(BM_memcpy)->Arg(8)->Arg(64)->Arg(512)->Arg(1<<10)->Arg(8<<10);
-```
-
-The preceding code is quite repetitive, and can be replaced with the following
-short-hand. The following invocation will pick a few appropriate arguments in
-the specified range and will generate a benchmark for each such argument.
-
-```c++
-BENCHMARK(BM_memcpy)->Range(8, 8<<10);
-```
-
-By default the arguments in the range are generated in multiples of eight and
-the command above selects [ 8, 64, 512, 4k, 8k ]. In the following code the
-range multiplier is changed to multiples of two.
-
-```c++
-BENCHMARK(BM_memcpy)->RangeMultiplier(2)->Range(8, 8<<10);
-```
-Now arguments generated are [ 8, 16, 32, 64, 128, 256, 512, 1024, 2k, 4k, 8k ].
-
-You might have a benchmark that depends on two or more inputs. For example, the
-following code defines a family of benchmarks for measuring the speed of set
-insertion.
-
-```c++
-static void BM_SetInsert(benchmark::State& state) {
-  std::set<int> data;
-  for (auto _ : state) {
-    state.PauseTiming();
-    data = ConstructRandomSet(state.range(0));
-    state.ResumeTiming();
-    for (int j = 0; j < state.range(1); ++j)
-      data.insert(RandomNumber());
-  }
-}
-BENCHMARK(BM_SetInsert)
-    ->Args({1<<10, 128})
-    ->Args({2<<10, 128})
-    ->Args({4<<10, 128})
-    ->Args({8<<10, 128})
-    ->Args({1<<10, 512})
-    ->Args({2<<10, 512})
-    ->Args({4<<10, 512})
-    ->Args({8<<10, 512});
-```
-
-The preceding code is quite repetitive, and can be replaced with the following
-short-hand. The following macro will pick a few appropriate arguments in the
-product of the two specified ranges and will generate a benchmark for each such
-pair.
-
-```c++
-BENCHMARK(BM_SetInsert)->Ranges({{1<<10, 8<<10}, {128, 512}});
-```
-
-For more complex patterns of inputs, passing a custom function to `Apply` allows
-programmatic specification of an arbitrary set of arguments on which to run the
-benchmark. The following example enumerates a dense range on one parameter,
-and a sparse range on the second.
-
-```c++
-static void CustomArguments(benchmark::internal::Benchmark* b) {
-  for (int i = 0; i <= 10; ++i)
-    for (int j = 32; j <= 1024*1024; j *= 8)
-      b->Args({i, j});
-}
-BENCHMARK(BM_SetInsert)->Apply(CustomArguments);
-```
-
-### Calculate asymptotic complexity (Big O)
-Asymptotic complexity might be calculated for a family of benchmarks. The
-following code will calculate the coefficient for the high-order term in the
-running time and the normalized root-mean square error of string comparison.
-
-```c++
-static void BM_StringCompare(benchmark::State& state) {
-  std::string s1(state.range(0), '-');
-  std::string s2(state.range(0), '-');
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(s1.compare(s2));
-  }
-  state.SetComplexityN(state.range(0));
-}
-BENCHMARK(BM_StringCompare)
-    ->RangeMultiplier(2)->Range(1<<10, 1<<18)->Complexity(benchmark::oN);
-```
-
-As shown in the following invocation, asymptotic complexity might also be
-calculated automatically.
-
-```c++
-BENCHMARK(BM_StringCompare)
-    ->RangeMultiplier(2)->Range(1<<10, 1<<18)->Complexity();
-```
-
-The following code will specify asymptotic complexity with a lambda function,
-that might be used to customize high-order term calculation.
-
-```c++
-BENCHMARK(BM_StringCompare)->RangeMultiplier(2)
-    ->Range(1<<10, 1<<18)->Complexity([](int64_t n)->double{return n; });
-```
-
-### Templated benchmarks
-Templated benchmarks work the same way: This example produces and consumes
-messages of size `sizeof(v)` `range_x` times. It also outputs throughput in the
-absence of multiprogramming.
-
-```c++
-template <class Q> void BM_Sequential(benchmark::State& state) {
-  Q q;
-  typename Q::value_type v;
-  for (auto _ : state) {
-    for (int i = state.range(0); i--; )
-      q.push(v);
-    for (int e = state.range(0); e--; )
-      q.Wait(&v);
-  }
-  // actually messages, not bytes:
-  state.SetBytesProcessed(
-      static_cast<int64_t>(state.iterations())*state.range(0));
-}
-BENCHMARK_TEMPLATE(BM_Sequential, WaitQueue<int>)->Range(1<<0, 1<<10);
-```
-
-Three macros are provided for adding benchmark templates.
-
-```c++
-#ifdef BENCHMARK_HAS_CXX11
-#define BENCHMARK_TEMPLATE(func, ...) // Takes any number of parameters.
-#else // C++ < C++11
-#define BENCHMARK_TEMPLATE(func, arg1)
-#endif
-#define BENCHMARK_TEMPLATE1(func, arg1)
-#define BENCHMARK_TEMPLATE2(func, arg1, arg2)
-```
-
-### A Faster KeepRunning loop
-
-In C++11 mode, a ranged-based for loop should be used in preference to
-the `KeepRunning` loop for running the benchmarks. For example:
-
-```c++
-static void BM_Fast(benchmark::State &state) {
-  for (auto _ : state) {
-    FastOperation();
-  }
-}
-BENCHMARK(BM_Fast);
-```
-
-The reason the ranged-for loop is faster than using `KeepRunning`, is
-because `KeepRunning` requires a memory load and store of the iteration count
-ever iteration, whereas the ranged-for variant is able to keep the iteration count
-in a register.
-
-For example, an empty inner loop of using the ranged-based for method looks like:
-
-```asm
-# Loop Init
-  mov rbx, qword ptr [r14 + 104]
-  call benchmark::State::StartKeepRunning()
-  test rbx, rbx
-  je .LoopEnd
-.LoopHeader: # =>This Inner Loop Header: Depth=1
-  add rbx, -1
-  jne .LoopHeader
-.LoopEnd:
-```
-
-Compared to an empty `KeepRunning` loop, which looks like:
-
-```asm
-.LoopHeader: # in Loop: Header=BB0_3 Depth=1
-  cmp byte ptr [rbx], 1
-  jne .LoopInit
-.LoopBody: # =>This Inner Loop Header: Depth=1
-  mov rax, qword ptr [rbx + 8]
-  lea rcx, [rax + 1]
-  mov qword ptr [rbx + 8], rcx
-  cmp rax, qword ptr [rbx + 104]
-  jb .LoopHeader
-  jmp .LoopEnd
-.LoopInit:
-  mov rdi, rbx
-  call benchmark::State::StartKeepRunning()
-  jmp .LoopBody
-.LoopEnd:
-```
-
-Unless C++03 compatibility is required, the ranged-for variant of writing
-the benchmark loop should be preferred.  
-
-## Passing arbitrary arguments to a benchmark
-In C++11 it is possible to define a benchmark that takes an arbitrary number
-of extra arguments. The `BENCHMARK_CAPTURE(func, test_case_name, ...args)`
-macro creates a benchmark that invokes `func`  with the `benchmark::State` as
-the first argument followed by the specified `args...`.
-The `test_case_name` is appended to the name of the benchmark and
-should describe the values passed.
-
-```c++
-template <class ...ExtraArgs>
-void BM_takes_args(benchmark::State& state, ExtraArgs&&... extra_args) {
-  [...]
-}
-// Registers a benchmark named "BM_takes_args/int_string_test" that passes
-// the specified values to `extra_args`.
-BENCHMARK_CAPTURE(BM_takes_args, int_string_test, 42, std::string("abc"));
-```
-Note that elements of `...args` may refer to global variables. Users should
-avoid modifying global state inside of a benchmark.
-
-## Using RegisterBenchmark(name, fn, args...)
-
-The `RegisterBenchmark(name, func, args...)` function provides an alternative
-way to create and register benchmarks.
-`RegisterBenchmark(name, func, args...)` creates, registers, and returns a
-pointer to a new benchmark with the specified `name` that invokes
-`func(st, args...)` where `st` is a `benchmark::State` object.
-
-Unlike the `BENCHMARK` registration macros, which can only be used at the global
-scope, the `RegisterBenchmark` can be called anywhere. This allows for
-benchmark tests to be registered programmatically.
-
-Additionally `RegisterBenchmark` allows any callable object to be registered
-as a benchmark. Including capturing lambdas and function objects.
-
-For Example:
-```c++
-auto BM_test = [](benchmark::State& st, auto Inputs) { /* ... */ };
-
-int main(int argc, char** argv) {
-  for (auto& test_input : { /* ... */ })
-      benchmark::RegisterBenchmark(test_input.name(), BM_test, test_input);
-  benchmark::Initialize(&argc, argv);
-  benchmark::RunSpecifiedBenchmarks();
-}
-```
-
-### Multithreaded benchmarks
-In a multithreaded test (benchmark invoked by multiple threads simultaneously),
-it is guaranteed that none of the threads will start until all have reached
-the start of the benchmark loop, and all will have finished before any thread
-exits the benchmark loop. (This behavior is also provided by the `KeepRunning()`
-API) As such, any global setup or teardown can be wrapped in a check against the thread
-index:
-
-```c++
-static void BM_MultiThreaded(benchmark::State& state) {
-  if (state.thread_index == 0) {
-    // Setup code here.
-  }
-  for (auto _ : state) {
-    // Run the test as normal.
-  }
-  if (state.thread_index == 0) {
-    // Teardown code here.
-  }
-}
-BENCHMARK(BM_MultiThreaded)->Threads(2);
-```
-
-If the benchmarked code itself uses threads and you want to compare it to
-single-threaded code, you may want to use real-time ("wallclock") measurements
-for latency comparisons:
-
-```c++
-BENCHMARK(BM_test)->Range(8, 8<<10)->UseRealTime();
-```
-
-Without `UseRealTime`, CPU time is used by default.
-
-## Controlling timers
-Normally, the entire duration of the work loop (`for (auto _ : state) {}`)
-is measured. But sometimes, it is nessesary to do some work inside of
-that loop, every iteration, but without counting that time to the benchmark time.
-That is possible, althought it is not recommended, since it has high overhead.
-
-```c++
-static void BM_SetInsert_With_Timer_Control(benchmark::State& state) {
-  std::set<int> data;
-  for (auto _ : state) {
-    state.PauseTiming(); // Stop timers. They will not count until they are resumed.
-    data = ConstructRandomSet(state.range(0)); // Do something that should not be measured
-    state.ResumeTiming(); // And resume timers. They are now counting again.
-    // The rest will be measured.
-    for (int j = 0; j < state.range(1); ++j)
-      data.insert(RandomNumber());
-  }
-}
-BENCHMARK(BM_SetInsert_With_Timer_Control)->Ranges({{1<<10, 8<<10}, {128, 512}});
-```
-
-## Manual timing
-For benchmarking something for which neither CPU time nor real-time are
-correct or accurate enough, completely manual timing is supported using
-the `UseManualTime` function.
-
-When `UseManualTime` is used, the benchmarked code must call
-`SetIterationTime` once per iteration of the benchmark loop to
-report the manually measured time.
-
-An example use case for this is benchmarking GPU execution (e.g. OpenCL
-or CUDA kernels, OpenGL or Vulkan or Direct3D draw calls), which cannot
-be accurately measured using CPU time or real-time. Instead, they can be
-measured accurately using a dedicated API, and these measurement results
-can be reported back with `SetIterationTime`.
-
-```c++
-static void BM_ManualTiming(benchmark::State& state) {
-  int microseconds = state.range(0);
-  std::chrono::duration<double, std::micro> sleep_duration {
-    static_cast<double>(microseconds)
-  };
-
-  for (auto _ : state) {
-    auto start = std::chrono::high_resolution_clock::now();
-    // Simulate some useful workload with a sleep
-    std::this_thread::sleep_for(sleep_duration);
-    auto end   = std::chrono::high_resolution_clock::now();
-
-    auto elapsed_seconds =
-      std::chrono::duration_cast<std::chrono::duration<double>>(
-        end - start);
-
-    state.SetIterationTime(elapsed_seconds.count());
-  }
-}
-BENCHMARK(BM_ManualTiming)->Range(1, 1<<17)->UseManualTime();
-```
-
-### Preventing optimisation
-To prevent a value or expression from being optimized away by the compiler
-the `benchmark::DoNotOptimize(...)` and `benchmark::ClobberMemory()`
-functions can be used.
-
-```c++
-static void BM_test(benchmark::State& state) {
-  for (auto _ : state) {
-      int x = 0;
-      for (int i=0; i < 64; ++i) {
-        benchmark::DoNotOptimize(x += i);
-      }
-  }
-}
-```
-
-`DoNotOptimize(<expr>)` forces the  *result* of `<expr>` to be stored in either
-memory or a register. For GNU based compilers it acts as read/write barrier
-for global memory. More specifically it forces the compiler to flush pending
-writes to memory and reload any other values as necessary.
-
-Note that `DoNotOptimize(<expr>)` does not prevent optimizations on `<expr>`
-in any way. `<expr>` may even be removed entirely when the result is already
-known. For example:
-
-```c++
-  /* Example 1: `<expr>` is removed entirely. */
-  int foo(int x) { return x + 42; }
-  while (...) DoNotOptimize(foo(0)); // Optimized to DoNotOptimize(42);
-
-  /*  Example 2: Result of '<expr>' is only reused */
-  int bar(int) __attribute__((const));
-  while (...) DoNotOptimize(bar(0)); // Optimized to:
-  // int __result__ = bar(0);
-  // while (...) DoNotOptimize(__result__);
-```
-
-The second tool for preventing optimizations is `ClobberMemory()`. In essence
-`ClobberMemory()` forces the compiler to perform all pending writes to global
-memory. Memory managed by block scope objects must be "escaped" using
-`DoNotOptimize(...)` before it can be clobbered. In the below example
-`ClobberMemory()` prevents the call to `v.push_back(42)` from being optimized
-away.
-
-```c++
-static void BM_vector_push_back(benchmark::State& state) {
-  for (auto _ : state) {
-    std::vector<int> v;
-    v.reserve(1);
-    benchmark::DoNotOptimize(v.data()); // Allow v.data() to be clobbered.
-    v.push_back(42);
-    benchmark::ClobberMemory(); // Force 42 to be written to memory.
-  }
-}
-```
-
-Note that `ClobberMemory()` is only available for GNU or MSVC based compilers.
-
-### Set time unit manually
-If a benchmark runs a few milliseconds it may be hard to visually compare the
-measured times, since the output data is given in nanoseconds per default. In
-order to manually set the time unit, you can specify it manually:
-
-```c++
-BENCHMARK(BM_test)->Unit(benchmark::kMillisecond);
-```
-
-### Reporting the mean, median and standard deviation by repeated benchmarks
-By default each benchmark is run once and that single result is reported.
-However benchmarks are often noisy and a single result may not be representative
-of the overall behavior. For this reason it's possible to repeatedly rerun the
-benchmark.
-
-The number of runs of each benchmark is specified globally by the
-`--benchmark_repetitions` flag or on a per benchmark basis by calling
-`Repetitions` on the registered benchmark object. When a benchmark is run more
-than once the mean, median and standard deviation of the runs will be reported.
-
-Additionally the `--benchmark_report_aggregates_only={true|false}`,
-`--benchmark_display_aggregates_only={true|false}` flags or
-`ReportAggregatesOnly(bool)`, `DisplayAggregatesOnly(bool)` functions can be
-used to change how repeated tests are reported. By default the result of each
-repeated run is reported. When `report aggregates only` option is `true`,
-only the aggregates (i.e. mean, median and standard deviation, maybe complexity
-measurements if they were requested) of the runs is reported, to both the
-reporters - standard output (console), and the file.
-However when only the `display aggregates only` option is `true`,
-only the aggregates are displayed in the standard output, while the file
-output still contains everything.
-Calling `ReportAggregatesOnly(bool)` / `DisplayAggregatesOnly(bool)` on a
-registered benchmark object overrides the value of the appropriate flag for that
-benchmark.
-
-## User-defined statistics for repeated benchmarks
-While having mean, median and standard deviation is nice, this may not be
-enough for everyone. For example you may want to know what is the largest
-observation, e.g. because you have some real-time constraints. This is easy.
-The following code will specify a custom statistic to be calculated, defined
-by a lambda function.
-
-```c++
-void BM_spin_empty(benchmark::State& state) {
-  for (auto _ : state) {
-    for (int x = 0; x < state.range(0); ++x) {
-      benchmark::DoNotOptimize(x);
-    }
-  }
-}
-
-BENCHMARK(BM_spin_empty)
-  ->ComputeStatistics("max", [](const std::vector<double>& v) -> double {
-    return *(std::max_element(std::begin(v), std::end(v)));
-  })
-  ->Arg(512);
-```
-
-## Fixtures
-Fixture tests are created by
-first defining a type that derives from `::benchmark::Fixture` and then
-creating/registering the tests using the following macros:
-
-* `BENCHMARK_F(ClassName, Method)`
-* `BENCHMARK_DEFINE_F(ClassName, Method)`
-* `BENCHMARK_REGISTER_F(ClassName, Method)`
-
-For Example:
-
-```c++
-class MyFixture : public benchmark::Fixture {};
-
-BENCHMARK_F(MyFixture, FooTest)(benchmark::State& st) {
-   for (auto _ : st) {
-     ...
-  }
-}
-
-BENCHMARK_DEFINE_F(MyFixture, BarTest)(benchmark::State& st) {
-   for (auto _ : st) {
-     ...
-  }
-}
-/* BarTest is NOT registered */
-BENCHMARK_REGISTER_F(MyFixture, BarTest)->Threads(2);
-/* BarTest is now registered */
-```
-
-### Templated fixtures
-Also you can create templated fixture by using the following macros:
-
-* `BENCHMARK_TEMPLATE_F(ClassName, Method, ...)`
-* `BENCHMARK_TEMPLATE_DEFINE_F(ClassName, Method, ...)`
-
-For example:
-```c++
-template<typename T>
-class MyFixture : public benchmark::Fixture {};
-
-BENCHMARK_TEMPLATE_F(MyFixture, IntTest, int)(benchmark::State& st) {
-   for (auto _ : st) {
-     ...
-  }
-}
-
-BENCHMARK_TEMPLATE_DEFINE_F(MyFixture, DoubleTest, double)(benchmark::State& st) {
-   for (auto _ : st) {
-     ...
-  }
-}
-
-BENCHMARK_REGISTER_F(MyFixture, DoubleTest)->Threads(2);
-```
-
-## User-defined counters
-
-You can add your own counters with user-defined names. The example below
-will add columns "Foo", "Bar" and "Baz" in its output:
-
-```c++
-static void UserCountersExample1(benchmark::State& state) {
-  double numFoos = 0, numBars = 0, numBazs = 0;
-  for (auto _ : state) {
-    // ... count Foo,Bar,Baz events
-  }
-  state.counters["Foo"] = numFoos;
-  state.counters["Bar"] = numBars;
-  state.counters["Baz"] = numBazs;
-}
-```
-
-The `state.counters` object is a `std::map` with `std::string` keys
-and `Counter` values. The latter is a `double`-like class, via an implicit
-conversion to `double&`. Thus you can use all of the standard arithmetic
-assignment operators (`=,+=,-=,*=,/=`) to change the value of each counter.
-
-In multithreaded benchmarks, each counter is set on the calling thread only.
-When the benchmark finishes, the counters from each thread will be summed;
-the resulting sum is the value which will be shown for the benchmark.
-
-The `Counter` constructor accepts three parameters: the value as a `double`
-; a bit flag which allows you to show counters as rates, and/or as per-thread
-iteration, and/or as per-thread averages, and/or iteration invariants;
-and a flag specifying the 'unit' - i.e. is 1k a 1000 (default,
-`benchmark::Counter::OneK::kIs1000`), or 1024
-(`benchmark::Counter::OneK::kIs1024`)?
-
-```c++
-  // sets a simple counter
-  state.counters["Foo"] = numFoos;
-
-  // Set the counter as a rate. It will be presented divided
-  // by the duration of the benchmark.
-  state.counters["FooRate"] = Counter(numFoos, benchmark::Counter::kIsRate);
-
-  // Set the counter as a thread-average quantity. It will
-  // be presented divided by the number of threads.
-  state.counters["FooAvg"] = Counter(numFoos, benchmark::Counter::kAvgThreads);
-
-  // There's also a combined flag:
-  state.counters["FooAvgRate"] = Counter(numFoos,benchmark::Counter::kAvgThreadsRate);
-
-  // This says that we process with the rate of state.range(0) bytes every iteration:
-  state.counters["BytesProcessed"] = Counter(state.range(0), benchmark::Counter::kIsIterationInvariantRate, benchmark::Counter::OneK::kIs1024);
-```
-
-When you're compiling in C++11 mode or later you can use `insert()` with
-`std::initializer_list`:
-
-```c++
-  // With C++11, this can be done:
-  state.counters.insert({{"Foo", numFoos}, {"Bar", numBars}, {"Baz", numBazs}});
-  // ... instead of:
-  state.counters["Foo"] = numFoos;
-  state.counters["Bar"] = numBars;
-  state.counters["Baz"] = numBazs;
-```
-
-### Counter reporting
-
-When using the console reporter, by default, user counters are are printed at
-the end after the table, the same way as ``bytes_processed`` and
-``items_processed``. This is best for cases in which there are few counters,
-or where there are only a couple of lines per benchmark. Here's an example of
-the default output:
-
-```
-------------------------------------------------------------------------------
-Benchmark                        Time           CPU Iterations UserCounters...
-------------------------------------------------------------------------------
-BM_UserCounter/threads:8      2248 ns      10277 ns      68808 Bar=16 Bat=40 Baz=24 Foo=8
-BM_UserCounter/threads:1      9797 ns       9788 ns      71523 Bar=2 Bat=5 Baz=3 Foo=1024m
-BM_UserCounter/threads:2      4924 ns       9842 ns      71036 Bar=4 Bat=10 Baz=6 Foo=2
-BM_UserCounter/threads:4      2589 ns      10284 ns      68012 Bar=8 Bat=20 Baz=12 Foo=4
-BM_UserCounter/threads:8      2212 ns      10287 ns      68040 Bar=16 Bat=40 Baz=24 Foo=8
-BM_UserCounter/threads:16     1782 ns      10278 ns      68144 Bar=32 Bat=80 Baz=48 Foo=16
-BM_UserCounter/threads:32     1291 ns      10296 ns      68256 Bar=64 Bat=160 Baz=96 Foo=32
-BM_UserCounter/threads:4      2615 ns      10307 ns      68040 Bar=8 Bat=20 Baz=12 Foo=4
-BM_Factorial                    26 ns         26 ns   26608979 40320
-BM_Factorial/real_time          26 ns         26 ns   26587936 40320
-BM_CalculatePiRange/1           16 ns         16 ns   45704255 0
-BM_CalculatePiRange/8           73 ns         73 ns    9520927 3.28374
-BM_CalculatePiRange/64         609 ns        609 ns    1140647 3.15746
-BM_CalculatePiRange/512       4900 ns       4901 ns     142696 3.14355
-```
-
-If this doesn't suit you, you can print each counter as a table column by
-passing the flag `--benchmark_counters_tabular=true` to the benchmark
-application. This is best for cases in which there are a lot of counters, or
-a lot of lines per individual benchmark. Note that this will trigger a
-reprinting of the table header any time the counter set changes between
-individual benchmarks. Here's an example of corresponding output when
-`--benchmark_counters_tabular=true` is passed:
-
-```
----------------------------------------------------------------------------------------
-Benchmark                        Time           CPU Iterations    Bar   Bat   Baz   Foo
----------------------------------------------------------------------------------------
-BM_UserCounter/threads:8      2198 ns       9953 ns      70688     16    40    24     8
-BM_UserCounter/threads:1      9504 ns       9504 ns      73787      2     5     3     1
-BM_UserCounter/threads:2      4775 ns       9550 ns      72606      4    10     6     2
-BM_UserCounter/threads:4      2508 ns       9951 ns      70332      8    20    12     4
-BM_UserCounter/threads:8      2055 ns       9933 ns      70344     16    40    24     8
-BM_UserCounter/threads:16     1610 ns       9946 ns      70720     32    80    48    16
-BM_UserCounter/threads:32     1192 ns       9948 ns      70496     64   160    96    32
-BM_UserCounter/threads:4      2506 ns       9949 ns      70332      8    20    12     4
---------------------------------------------------------------
-Benchmark                        Time           CPU Iterations
---------------------------------------------------------------
-BM_Factorial                    26 ns         26 ns   26392245 40320
-BM_Factorial/real_time          26 ns         26 ns   26494107 40320
-BM_CalculatePiRange/1           15 ns         15 ns   45571597 0
-BM_CalculatePiRange/8           74 ns         74 ns    9450212 3.28374
-BM_CalculatePiRange/64         595 ns        595 ns    1173901 3.15746
-BM_CalculatePiRange/512       4752 ns       4752 ns     147380 3.14355
-BM_CalculatePiRange/4k       37970 ns      37972 ns      18453 3.14184
-BM_CalculatePiRange/32k     303733 ns     303744 ns       2305 3.14162
-BM_CalculatePiRange/256k   2434095 ns    2434186 ns        288 3.1416
-BM_CalculatePiRange/1024k  9721140 ns    9721413 ns         71 3.14159
-BM_CalculatePi/threads:8      2255 ns       9943 ns      70936
-```
-Note above the additional header printed when the benchmark changes from
-``BM_UserCounter`` to ``BM_Factorial``. This is because ``BM_Factorial`` does
-not have the same counter set as ``BM_UserCounter``.
-
-## Exiting Benchmarks in Error
-
-When errors caused by external influences, such as file I/O and network
-communication, occur within a benchmark the
-`State::SkipWithError(const char* msg)` function can be used to skip that run
-of benchmark and report the error. Note that only future iterations of the
-`KeepRunning()` are skipped. For the ranged-for version of the benchmark loop
-Users must explicitly exit the loop, otherwise all iterations will be performed.
-Users may explicitly return to exit the benchmark immediately.
-
-The `SkipWithError(...)` function may be used at any point within the benchmark,
-including before and after the benchmark loop.
-
-For example:
-
-```c++
-static void BM_test(benchmark::State& state) {
-  auto resource = GetResource();
-  if (!resource.good()) {
-      state.SkipWithError("Resource is not good!");
-      // KeepRunning() loop will not be entered.
-  }
-  for (state.KeepRunning()) {
-      auto data = resource.read_data();
-      if (!resource.good()) {
-        state.SkipWithError("Failed to read data!");
-        break; // Needed to skip the rest of the iteration.
-     }
-     do_stuff(data);
-  }
-}
-
-static void BM_test_ranged_fo(benchmark::State & state) {
-  state.SkipWithError("test will not be entered");
-  for (auto _ : state) {
-    state.SkipWithError("Failed!");
-    break; // REQUIRED to prevent all further iterations.
-  }
-}
-```
-
-## Running a subset of the benchmarks
-
-The `--benchmark_filter=<regex>` option can be used to only run the benchmarks
-which match the specified `<regex>`. For example:
-
-```bash
-$ ./run_benchmarks.x --benchmark_filter=BM_memcpy/32
-Run on (1 X 2300 MHz CPU )
-2016-06-25 19:34:24
-Benchmark              Time           CPU Iterations
-----------------------------------------------------
-BM_memcpy/32          11 ns         11 ns   79545455
-BM_memcpy/32k       2181 ns       2185 ns     324074
-BM_memcpy/32          12 ns         12 ns   54687500
-BM_memcpy/32k       1834 ns       1837 ns     357143
-```
-
-## Runtime and reporting considerations
-When the benchmark binary is executed, each benchmark function is run serially.
-The number of iterations to run is determined dynamically by running the
-benchmark a few times and measuring the time taken and ensuring that the
-ultimate result will be statistically stable. As such, faster benchmark
-functions will be run for more iterations than slower benchmark functions, and
-the number of iterations is thus reported.
-
-In all cases, the number of iterations for which the benchmark is run is
-governed by the amount of time the benchmark takes. Concretely, the number of
-iterations is at least one, not more than 1e9, until CPU time is greater than
-the minimum time, or the wallclock time is 5x minimum time. The minimum time is
-set per benchmark by calling `MinTime` on the registered benchmark object.
-
-Average timings are then reported over the iterations run. If multiple
-repetitions are requested using the `--benchmark_repetitions` command-line
-option, or at registration time, the benchmark function will be run several
-times and statistical results across these repetitions will also be reported.
-
-As well as the per-benchmark entries, a preamble in the report will include
-information about the machine on which the benchmarks are run.
-
-### Output Formats
-The library supports multiple output formats. Use the
-`--benchmark_format=<console|json|csv>` flag to set the format type. `console`
-is the default format.
-
-The Console format is intended to be a human readable format. By default
-the format generates color output. Context is output on stderr and the
-tabular data on stdout. Example tabular output looks like:
-```
-Benchmark                               Time(ns)    CPU(ns) Iterations
-----------------------------------------------------------------------
-BM_SetInsert/1024/1                        28928      29349      23853  133.097kB/s   33.2742k items/s
-BM_SetInsert/1024/8                        32065      32913      21375  949.487kB/s   237.372k items/s
-BM_SetInsert/1024/10                       33157      33648      21431  1.13369MB/s   290.225k items/s
-```
-
-The JSON format outputs human readable json split into two top level attributes.
-The `context` attribute contains information about the run in general, including
-information about the CPU and the date.
-The `benchmarks` attribute contains a list of every benchmark run. Example json
-output looks like:
-```json
-{
-  "context": {
-    "date": "2015/03/17-18:40:25",
-    "num_cpus": 40,
-    "mhz_per_cpu": 2801,
-    "cpu_scaling_enabled": false,
-    "build_type": "debug"
-  },
-  "benchmarks": [
-    {
-      "name": "BM_SetInsert/1024/1",
-      "iterations": 94877,
-      "real_time": 29275,
-      "cpu_time": 29836,
-      "bytes_per_second": 134066,
-      "items_per_second": 33516
-    },
-    {
-      "name": "BM_SetInsert/1024/8",
-      "iterations": 21609,
-      "real_time": 32317,
-      "cpu_time": 32429,
-      "bytes_per_second": 986770,
-      "items_per_second": 246693
-    },
-    {
-      "name": "BM_SetInsert/1024/10",
-      "iterations": 21393,
-      "real_time": 32724,
-      "cpu_time": 33355,
-      "bytes_per_second": 1199226,
-      "items_per_second": 299807
-    }
-  ]
-}
-```
-
-The CSV format outputs comma-separated values. The `context` is output on stderr
-and the CSV itself on stdout. Example CSV output looks like:
-```
-name,iterations,real_time,cpu_time,bytes_per_second,items_per_second,label
-"BM_SetInsert/1024/1",65465,17890.7,8407.45,475768,118942,
-"BM_SetInsert/1024/8",116606,18810.1,9766.64,3.27646e+06,819115,
-"BM_SetInsert/1024/10",106365,17238.4,8421.53,4.74973e+06,1.18743e+06,
-```
-
-### Output Files
-The library supports writing the output of the benchmark to a file specified
-by `--benchmark_out=<filename>`. The format of the output can be specified
-using `--benchmark_out_format={json|console|csv}`. Specifying
-`--benchmark_out` does not suppress the console output.
-
-## Result comparison
-
-It is possible to compare the benchmarking results. See [Additional Tooling Documentation](docs/tools.md)
-
-## Debug vs Release
-By default, benchmark builds as a debug library. You will see a warning in the
-output when this is the case. To build it as a release library instead, use:
-
-```
-cmake -DCMAKE_BUILD_TYPE=Release
-```
-
-To enable link-time optimisation, use
-
-```
-cmake -DCMAKE_BUILD_TYPE=Release -DBENCHMARK_ENABLE_LTO=true
-```
-
-If you are using gcc, you might need to set `GCC_AR` and `GCC_RANLIB` cmake
-cache variables, if autodetection fails.
-
-If you are using clang, you may need to set `LLVMAR_EXECUTABLE`,
-`LLVMNM_EXECUTABLE` and `LLVMRANLIB_EXECUTABLE` cmake cache variables.
-
-## Compiler Support
-
-Google Benchmark uses C++11 when building the library. As such we require
-a modern C++ toolchain, both compiler and standard library.
-
-The following minimum versions are strongly recommended build the library:
-
-* GCC 4.8
-* Clang 3.4
-* Visual Studio 2013
-* Intel 2015 Update 1
-
-Anything older *may* work.
-
-Note: Using the library and its headers in C++03 is supported. C++11 is only
-required to build the library.
-
-## Disable CPU frequency scaling
-If you see this error:
-```
-***WARNING*** CPU scaling is enabled, the benchmark real time measurements may be noisy and will incur extra overhead.
-```
-you might want to disable the CPU frequency scaling while running the benchmark:
-```bash
-sudo cpupower frequency-set --governor performance
-./mybench
-sudo cpupower frequency-set --governor powersave
-```
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/WORKSPACE b/gnu/llvm/libcxx/utils/google-benchmark/WORKSPACE
deleted file mode 100644
index 54734f1ea55..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/WORKSPACE
+++ /dev/null
@@ -1,7 +0,0 @@
-workspace(name = "com_github_google_benchmark")
-
-http_archive(
-     name = "com_google_googletest",
-     urls = ["https://github.com/google/googletest/archive/3f0cf6b62ad1eb50d8736538363d3580dd640c3e.zip"],
-     strip_prefix = "googletest-3f0cf6b62ad1eb50d8736538363d3580dd640c3e",
-)
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/_config.yml b/gnu/llvm/libcxx/utils/google-benchmark/_config.yml
deleted file mode 100644
index 1fa5ff852bd..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/_config.yml
+++ /dev/null
@@ -1,2 +0,0 @@
-theme: jekyll-theme-midnight
-markdown: GFM
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/appveyor.yml b/gnu/llvm/libcxx/utils/google-benchmark/appveyor.yml
deleted file mode 100644
index cf240190bea..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/appveyor.yml
+++ /dev/null
@@ -1,50 +0,0 @@
-version: '{build}'
-
-image: Visual Studio 2017
-
-configuration:
-  - Debug
-  - Release
-
-environment:
-  matrix:
-    - compiler: msvc-15-seh
-      generator: "Visual Studio 15 2017"
-
-    - compiler: msvc-15-seh
-      generator: "Visual Studio 15 2017 Win64"
-
-    - compiler: msvc-14-seh
-      generator: "Visual Studio 14 2015"
-
-    - compiler: msvc-14-seh
-      generator: "Visual Studio 14 2015 Win64"
-
-    - compiler: gcc-5.3.0-posix
-      generator: "MinGW Makefiles"
-      cxx_path: 'C:\mingw-w64\i686-5.3.0-posix-dwarf-rt_v4-rev0\mingw32\bin'
-      APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
-
-matrix:
-  fast_finish: true
-
-install:
-  # git bash conflicts with MinGW makefiles
-  - if "%generator%"=="MinGW Makefiles" (set "PATH=%PATH:C:\Program Files\Git\usr\bin;=%")
-  - if not "%cxx_path%"=="" (set "PATH=%PATH%;%cxx_path%")
-
-build_script:
-  - md _build -Force
-  - cd _build
-  - echo %configuration%
-  - cmake -G "%generator%" "-DCMAKE_BUILD_TYPE=%configuration%" -DBENCHMARK_DOWNLOAD_DEPENDENCIES=ON ..
-  - cmake --build . --config %configuration%
-
-test_script:
-  - ctest -c %configuration% --timeout 300 --output-on-failure
-
-artifacts:
-  - path: '_build/CMakeFiles/*.log'
-    name: logs
-  - path: '_build/Testing/**/*.xml'
-    name: test_results
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/bindings/python/BUILD b/gnu/llvm/libcxx/utils/google-benchmark/bindings/python/BUILD
deleted file mode 100644
index 9559a76b30a..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/bindings/python/BUILD
+++ /dev/null
@@ -1,3 +0,0 @@
-exports_files(glob(["*.BUILD"]))
-exports_files(["build_defs.bzl"])
-
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/bindings/python/build_defs.bzl b/gnu/llvm/libcxx/utils/google-benchmark/bindings/python/build_defs.bzl
deleted file mode 100644
index 45907aaa5e2..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/bindings/python/build_defs.bzl
+++ /dev/null
@@ -1,25 +0,0 @@
-_SHARED_LIB_SUFFIX = {
-    "//conditions:default": ".so",
-    "//:windows": ".dll",
-}
-
-def py_extension(name, srcs, hdrs = [], copts = [], features = [], deps = []):
-    for shared_lib_suffix in _SHARED_LIB_SUFFIX.values():
-        shared_lib_name = name + shared_lib_suffix
-        native.cc_binary(
-            name = shared_lib_name,
-            linkshared = 1,
-            linkstatic = 1,
-            srcs = srcs + hdrs,
-            copts = copts,
-            features = features,
-            deps = deps,
-        )
-
-    return native.py_library(
-        name = name,
-        data = select({
-            platform: [name + shared_lib_suffix]
-            for platform, shared_lib_suffix in _SHARED_LIB_SUFFIX.items()
-        }),
-    )
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/bindings/python/google_benchmark/BUILD b/gnu/llvm/libcxx/utils/google-benchmark/bindings/python/google_benchmark/BUILD
deleted file mode 100644
index 3c1561f48ee..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/bindings/python/google_benchmark/BUILD
+++ /dev/null
@@ -1,38 +0,0 @@
-load("//bindings/python:build_defs.bzl", "py_extension")
-
-py_library(
-    name = "google_benchmark",
-    srcs = ["__init__.py"],
-    visibility = ["//visibility:public"],
-    deps = [
-        ":_benchmark",
-        # pip; absl:app
-    ],
-)
-
-py_extension(
-    name = "_benchmark",
-    srcs = ["benchmark.cc"],
-    copts = [
-        "-fexceptions",
-        "-fno-strict-aliasing",
-    ],
-    features = ["-use_header_modules"],
-    deps = [
-        "//:benchmark",
-        "@pybind11",
-        "@python_headers",
-    ],
-)
-
-py_test(
-    name = "example",
-    srcs = ["example.py"],
-    python_version = "PY3",
-    srcs_version = "PY3",
-    visibility = ["//visibility:public"],
-    deps = [
-        ":google_benchmark",
-    ],
-)
-
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/bindings/python/google_benchmark/__init__.py b/gnu/llvm/libcxx/utils/google-benchmark/bindings/python/google_benchmark/__init__.py
deleted file mode 100644
index 1055bf24185..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/bindings/python/google_benchmark/__init__.py
+++ /dev/null
@@ -1,158 +0,0 @@
-# Copyright 2020 Google Inc. All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-"""Python benchmarking utilities.
-
-Example usage:
-  import google_benchmark as benchmark
-
-  @benchmark.register
-  def my_benchmark(state):
-      ...  # Code executed outside `while` loop is not timed.
-
-      while state:
-        ...  # Code executed within `while` loop is timed.
-
-  if __name__ == '__main__':
-    benchmark.main()
-"""
-
-from absl import app
-from google_benchmark import _benchmark
-from google_benchmark._benchmark import (
-    Counter,
-    kNanosecond,
-    kMicrosecond,
-    kMillisecond,
-    kSecond,
-    oNone,
-    o1,
-    oN,
-    oNSquared,
-    oNCubed,
-    oLogN,
-    oNLogN,
-    oAuto,
-    oLambda,
-)
-
-
-__all__ = [
-    "register",
-    "main",
-    "Counter",
-    "kNanosecond",
-    "kMicrosecond",
-    "kMillisecond",
-    "kSecond",
-    "oNone",
-    "o1",
-    "oN",
-    "oNSquared",
-    "oNCubed",
-    "oLogN",
-    "oNLogN",
-    "oAuto",
-    "oLambda",
-]
-
-__version__ = "0.2.0"
-
-
-class __OptionMaker:
-    """A stateless class to collect benchmark options.
-
-    Collect all decorator calls like @option.range(start=0, limit=1<<5).
-    """
-
-    class Options:
-        """Pure data class to store options calls, along with the benchmarked function."""
-
-        def __init__(self, func):
-            self.func = func
-            self.builder_calls = []
-
-    @classmethod
-    def make(cls, func_or_options):
-        """Make Options from Options or the benchmarked function."""
-        if isinstance(func_or_options, cls.Options):
-            return func_or_options
-        return cls.Options(func_or_options)
-
-    def __getattr__(self, builder_name):
-        """Append option call in the Options."""
-
-        # The function that get returned on @option.range(start=0, limit=1<<5).
-        def __builder_method(*args, **kwargs):
-
-            # The decorator that get called, either with the benchmared function
-            # or the previous Options
-            def __decorator(func_or_options):
-                options = self.make(func_or_options)
-                options.builder_calls.append((builder_name, args, kwargs))
-                # The decorator returns Options so it is not technically a decorator
-                # and needs a final call to @regiser
-                return options
-
-            return __decorator
-
-        return __builder_method
-
-
-# Alias for nicer API.
-# We have to instantiate an object, even if stateless, to be able to use __getattr__
-# on option.range
-option = __OptionMaker()
-
-
-def register(undefined=None, *, name=None):
-    """Register function for benchmarking."""
-    if undefined is None:
-        # Decorator is called without parenthesis so we return a decorator
-        return lambda f: register(f, name=name)
-
-    # We have either the function to benchmark (simple case) or an instance of Options
-    # (@option._ case).
-    options = __OptionMaker.make(undefined)
-
-    if name is None:
-        name = options.func.__name__
-
-    # We register the benchmark and reproduce all the @option._ calls onto the
-    # benchmark builder pattern
-    benchmark = _benchmark.RegisterBenchmark(name, options.func)
-    for name, args, kwargs in options.builder_calls[::-1]:
-        getattr(benchmark, name)(*args, **kwargs)
-
-    # return the benchmarked function because the decorator does not modify it
-    return options.func
-
-
-def _flags_parser(argv):
-    argv = _benchmark.Initialize(argv)
-    return app.parse_flags_with_usage(argv)
-
-
-def _run_benchmarks(argv):
-    if len(argv) > 1:
-        raise app.UsageError("Too many command-line arguments.")
-    return _benchmark.RunSpecifiedBenchmarks()
-
-
-def main(argv=None):
-    return app.run(_run_benchmarks, argv=argv, flags_parser=_flags_parser)
-
-
-# Methods for use with custom main function.
-initialize = _benchmark.Initialize
-run_benchmarks = _benchmark.RunSpecifiedBenchmarks
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/bindings/python/google_benchmark/benchmark.cc b/gnu/llvm/libcxx/utils/google-benchmark/bindings/python/google_benchmark/benchmark.cc
deleted file mode 100644
index 1b01fe7f7f0..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/bindings/python/google_benchmark/benchmark.cc
+++ /dev/null
@@ -1,181 +0,0 @@
-// Benchmark for Python.
-
-#include <map>
-#include <string>
-#include <vector>
-
-#include "pybind11/operators.h"
-#include "pybind11/pybind11.h"
-#include "pybind11/stl.h"
-#include "pybind11/stl_bind.h"
-
-#include "benchmark/benchmark.h"
-
-PYBIND11_MAKE_OPAQUE(benchmark::UserCounters);
-
-namespace {
-namespace py = ::pybind11;
-
-std::vector<std::string> Initialize(const std::vector<std::string>& argv) {
-  // The `argv` pointers here become invalid when this function returns, but
-  // benchmark holds the pointer to `argv[0]`. We create a static copy of it
-  // so it persists, and replace the pointer below.
-  static std::string executable_name(argv[0]);
-  std::vector<char*> ptrs;
-  ptrs.reserve(argv.size());
-  for (auto& arg : argv) {
-    ptrs.push_back(const_cast<char*>(arg.c_str()));
-  }
-  ptrs[0] = const_cast<char*>(executable_name.c_str());
-  int argc = static_cast<int>(argv.size());
-  benchmark::Initialize(&argc, ptrs.data());
-  std::vector<std::string> remaining_argv;
-  remaining_argv.reserve(argc);
-  for (int i = 0; i < argc; ++i) {
-    remaining_argv.emplace_back(ptrs[i]);
-  }
-  return remaining_argv;
-}
-
-benchmark::internal::Benchmark* RegisterBenchmark(const char* name,
-                                                  py::function f) {
-  return benchmark::RegisterBenchmark(
-      name, [f](benchmark::State& state) { f(&state); });
-}
-
-PYBIND11_MODULE(_benchmark, m) {
-  using benchmark::TimeUnit;
-  py::enum_<TimeUnit>(m, "TimeUnit")
-      .value("kNanosecond", TimeUnit::kNanosecond)
-      .value("kMicrosecond", TimeUnit::kMicrosecond)
-      .value("kMillisecond", TimeUnit::kMillisecond)
-      .value("kSecond", TimeUnit::kSecond)
-      .export_values();
-
-  using benchmark::BigO;
-  py::enum_<BigO>(m, "BigO")
-      .value("oNone", BigO::oNone)
-      .value("o1", BigO::o1)
-      .value("oN", BigO::oN)
-      .value("oNSquared", BigO::oNSquared)
-      .value("oNCubed", BigO::oNCubed)
-      .value("oLogN", BigO::oLogN)
-      .value("oNLogN", BigO::oLogN)
-      .value("oAuto", BigO::oAuto)
-      .value("oLambda", BigO::oLambda)
-      .export_values();
-
-  using benchmark::internal::Benchmark;
-  py::class_<Benchmark>(m, "Benchmark")
-      // For methods returning a pointer tor the current object, reference
-      // return policy is used to ask pybind not to take ownership oof the
-      // returned object and avoid calling delete on it.
-      // https://pybind11.readthedocs.io/en/stable/advanced/functions.html#return-value-policies
-      //
-      // For methods taking a const std::vector<...>&, a copy is created
-      // because a it is bound to a Python list.
-      // https://pybind11.readthedocs.io/en/stable/advanced/cast/stl.html
-      .def("unit", &Benchmark::Unit, py::return_value_policy::reference)
-      .def("arg", &Benchmark::Arg, py::return_value_policy::reference)
-      .def("args", &Benchmark::Args, py::return_value_policy::reference)
-      .def("range", &Benchmark::Range, py::return_value_policy::reference,
-           py::arg("start"), py::arg("limit"))
-      .def("dense_range", &Benchmark::DenseRange,
-           py::return_value_policy::reference, py::arg("start"),
-           py::arg("limit"), py::arg("step") = 1)
-      .def("ranges", &Benchmark::Ranges, py::return_value_policy::reference)
-      .def("args_product", &Benchmark::ArgsProduct,
-           py::return_value_policy::reference)
-      .def("arg_name", &Benchmark::ArgName, py::return_value_policy::reference)
-      .def("arg_names", &Benchmark::ArgNames,
-           py::return_value_policy::reference)
-      .def("range_pair", &Benchmark::RangePair,
-           py::return_value_policy::reference, py::arg("lo1"), py::arg("hi1"),
-           py::arg("lo2"), py::arg("hi2"))
-      .def("range_multiplier", &Benchmark::RangeMultiplier,
-           py::return_value_policy::reference)
-      .def("min_time", &Benchmark::MinTime, py::return_value_policy::reference)
-      .def("iterations", &Benchmark::Iterations,
-           py::return_value_policy::reference)
-      .def("repetitions", &Benchmark::Repetitions,
-           py::return_value_policy::reference)
-      .def("report_aggregates_only", &Benchmark::ReportAggregatesOnly,
-           py::return_value_policy::reference, py::arg("value") = true)
-      .def("display_aggregates_only", &Benchmark::DisplayAggregatesOnly,
-           py::return_value_policy::reference, py::arg("value") = true)
-      .def("measure_process_cpu_time", &Benchmark::MeasureProcessCPUTime,
-           py::return_value_policy::reference)
-      .def("use_real_time", &Benchmark::UseRealTime,
-           py::return_value_policy::reference)
-      .def("use_manual_time", &Benchmark::UseManualTime,
-           py::return_value_policy::reference)
-      .def(
-          "complexity",
-          (Benchmark * (Benchmark::*)(benchmark::BigO)) & Benchmark::Complexity,
-          py::return_value_policy::reference,
-          py::arg("complexity") = benchmark::oAuto);
-
-  using benchmark::Counter;
-  py::class_<Counter> py_counter(m, "Counter");
-
-  py::enum_<Counter::Flags>(py_counter, "Flags")
-      .value("kDefaults", Counter::Flags::kDefaults)
-      .value("kIsRate", Counter::Flags::kIsRate)
-      .value("kAvgThreads", Counter::Flags::kAvgThreads)
-      .value("kAvgThreadsRate", Counter::Flags::kAvgThreadsRate)
-      .value("kIsIterationInvariant", Counter::Flags::kIsIterationInvariant)
-      .value("kIsIterationInvariantRate",
-             Counter::Flags::kIsIterationInvariantRate)
-      .value("kAvgIterations", Counter::Flags::kAvgIterations)
-      .value("kAvgIterationsRate", Counter::Flags::kAvgIterationsRate)
-      .value("kInvert", Counter::Flags::kInvert)
-      .export_values()
-      .def(py::self | py::self);
-
-  py::enum_<Counter::OneK>(py_counter, "OneK")
-      .value("kIs1000", Counter::OneK::kIs1000)
-      .value("kIs1024", Counter::OneK::kIs1024)
-      .export_values();
-
-  py_counter
-      .def(py::init<double, Counter::Flags, Counter::OneK>(),
-           py::arg("value") = 0., py::arg("flags") = Counter::kDefaults,
-           py::arg("k") = Counter::kIs1000)
-      .def(py::init([](double value) { return Counter(value); }))
-      .def_readwrite("value", &Counter::value)
-      .def_readwrite("flags", &Counter::flags)
-      .def_readwrite("oneK", &Counter::oneK);
-  py::implicitly_convertible<py::float_, Counter>();
-  py::implicitly_convertible<py::int_, Counter>();
-
-  py::bind_map<benchmark::UserCounters>(m, "UserCounters");
-
-  using benchmark::State;
-  py::class_<State>(m, "State")
-      .def("__bool__", &State::KeepRunning)
-      .def_property_readonly("keep_running", &State::KeepRunning)
-      .def("pause_timing", &State::PauseTiming)
-      .def("resume_timing", &State::ResumeTiming)
-      .def("skip_with_error", &State::SkipWithError)
-      .def_property_readonly("error_occurred", &State::error_occurred)
-      .def("set_iteration_time", &State::SetIterationTime)
-      .def_property("bytes_processed", &State::bytes_processed,
-                    &State::SetBytesProcessed)
-      .def_property("complexity_n", &State::complexity_length_n,
-                    &State::SetComplexityN)
-      .def_property("items_processed", &State::items_processed,
-                    &State::SetItemsProcessed)
-      .def("set_label", (void (State::*)(const char*)) & State::SetLabel)
-      .def("range", &State::range, py::arg("pos") = 0)
-      .def_property_readonly("iterations", &State::iterations)
-      .def_readwrite("counters", &State::counters)
-      .def_readonly("thread_index", &State::thread_index)
-      .def_readonly("threads", &State::threads);
-
-  m.def("Initialize", Initialize);
-  m.def("RegisterBenchmark", RegisterBenchmark,
-        py::return_value_policy::reference);
-  m.def("RunSpecifiedBenchmarks",
-        []() { benchmark::RunSpecifiedBenchmarks(); });
-};
-}  // namespace
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/bindings/python/google_benchmark/example.py b/gnu/llvm/libcxx/utils/google-benchmark/bindings/python/google_benchmark/example.py
deleted file mode 100644
index 9134e8cffea..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/bindings/python/google_benchmark/example.py
+++ /dev/null
@@ -1,136 +0,0 @@
-# Copyright 2020 Google Inc. All rights reserved.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-"""Example of Python using C++ benchmark framework.
-
-To run this example, you must first install the `google_benchmark` Python package.
-
-To install using `setup.py`, download and extract the `google_benchmark` source.
-In the extracted directory, execute:
-  python setup.py install
-"""
-
-import random
-import time
-
-import google_benchmark as benchmark
-from google_benchmark import Counter
-
-
-@benchmark.register
-def empty(state):
-    while state:
-        pass
-
-
-@benchmark.register
-def sum_million(state):
-    while state:
-        sum(range(1_000_000))
-
-@benchmark.register
-def pause_timing(state):
-    """Pause timing every iteration."""
-    while state:
-        # Construct a list of random ints every iteration without timing it
-        state.pause_timing()
-        random_list = [random.randint(0, 100) for _ in range(100)]
-        state.resume_timing()
-        # Time the in place sorting algorithm
-        random_list.sort()
-
-
-@benchmark.register
-def skipped(state):
-    if True:  # Test some predicate here.
-        state.skip_with_error("some error")
-        return  # NOTE: You must explicitly return, or benchmark will continue.
-
-    ...  # Benchmark code would be here.
-
-
-@benchmark.register
-def manual_timing(state):
-    while state:
-        # Manually count Python CPU time
-        start = time.perf_counter()  # perf_counter_ns() in Python 3.7+
-        # Something to benchmark
-        time.sleep(0.01)
-        end = time.perf_counter()
-        state.set_iteration_time(end - start)
-
-
-@benchmark.register
-def custom_counters(state):
-    """Collect cutom metric using benchmark.Counter."""
-    num_foo = 0.0
-    while state:
-        # Benchmark some code here
-        pass
-        # Collect some custom metric named foo
-        num_foo += 0.13
-
-    # Automatic Counter from numbers.
-    state.counters["foo"] = num_foo
-    # Set a counter as a rate.
-    state.counters["foo_rate"] = Counter(num_foo, Counter.kIsRate)
-    #  Set a counter as an inverse of rate.
-    state.counters["foo_inv_rate"] = Counter(num_foo, Counter.kIsRate | Counter.kInvert)
-    # Set a counter as a thread-average quantity.
-    state.counters["foo_avg"] = Counter(num_foo, Counter.kAvgThreads)
-    # There's also a combined flag:
-    state.counters["foo_avg_rate"] = Counter(num_foo, Counter.kAvgThreadsRate)
-
-
-@benchmark.register
-@benchmark.option.measure_process_cpu_time()
-@benchmark.option.use_real_time()
-def with_options(state):
-    while state:
-        sum(range(1_000_000))
-
-
-@benchmark.register(name="sum_million_microseconds")
-@benchmark.option.unit(benchmark.kMicrosecond)
-def with_options(state):
-    while state:
-        sum(range(1_000_000))
-
-
-@benchmark.register
-@benchmark.option.arg(100)
-@benchmark.option.arg(1000)
-def passing_argument(state):
-    while state:
-        sum(range(state.range(0)))
-
-
-@benchmark.register
-@benchmark.option.range(8, limit=8 << 10)
-def using_range(state):
-    while state:
-        sum(range(state.range(0)))
-
-
-@benchmark.register
-@benchmark.option.range_multiplier(2)
-@benchmark.option.range(1 << 10, 1 << 18)
-@benchmark.option.complexity(benchmark.oN)
-def computing_complexity(state):
-    while state:
-        sum(range(state.range(0)))
-    state.complexity_n = state.range(0)
-
-
-if __name__ == "__main__":
-    benchmark.main()
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/bindings/python/pybind11.BUILD b/gnu/llvm/libcxx/utils/google-benchmark/bindings/python/pybind11.BUILD
deleted file mode 100644
index bc833500383..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/bindings/python/pybind11.BUILD
+++ /dev/null
@@ -1,20 +0,0 @@
-cc_library(
-    name = "pybind11",
-    hdrs = glob(
-        include = [
-            "include/pybind11/*.h",
-            "include/pybind11/detail/*.h",
-        ],
-        exclude = [
-            "include/pybind11/common.h",
-            "include/pybind11/eigen.h",
-        ],
-    ),
-    copts = [
-        "-fexceptions",
-        "-Wno-undefined-inline",
-        "-Wno-pragma-once-outside-header",
-    ],
-    includes = ["include"],
-    visibility = ["//visibility:public"],
-)
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/bindings/python/python_headers.BUILD b/gnu/llvm/libcxx/utils/google-benchmark/bindings/python/python_headers.BUILD
deleted file mode 100644
index 9c34cf6ca4b..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/bindings/python/python_headers.BUILD
+++ /dev/null
@@ -1,6 +0,0 @@
-cc_library(
-    name = "python_headers",
-    hdrs = glob(["**/*.h"]),
-    includes = ["."],
-    visibility = ["//visibility:public"],
-)
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/bindings/python/requirements.txt b/gnu/llvm/libcxx/utils/google-benchmark/bindings/python/requirements.txt
deleted file mode 100644
index f5bbe7eca5c..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/bindings/python/requirements.txt
+++ /dev/null
@@ -1,2 +0,0 @@
-absl-py>=0.7.1
-
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/cmake/AddCXXCompilerFlag.cmake b/gnu/llvm/libcxx/utils/google-benchmark/cmake/AddCXXCompilerFlag.cmake
deleted file mode 100644
index d0d20998144..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/cmake/AddCXXCompilerFlag.cmake
+++ /dev/null
@@ -1,74 +0,0 @@
-# - Adds a compiler flag if it is supported by the compiler
-#
-# This function checks that the supplied compiler flag is supported and then
-# adds it to the corresponding compiler flags
-#
-#  add_cxx_compiler_flag(<FLAG> [<VARIANT>])
-#
-# - Example
-#
-# include(AddCXXCompilerFlag)
-# add_cxx_compiler_flag(-Wall)
-# add_cxx_compiler_flag(-no-strict-aliasing RELEASE)
-# Requires CMake 2.6+
-
-if(__add_cxx_compiler_flag)
-  return()
-endif()
-set(__add_cxx_compiler_flag INCLUDED)
-
-include(CheckCXXCompilerFlag)
-
-function(mangle_compiler_flag FLAG OUTPUT)
-  string(TOUPPER "HAVE_CXX_FLAG_${FLAG}" SANITIZED_FLAG)
-  string(REPLACE "+" "X" SANITIZED_FLAG ${SANITIZED_FLAG})
-  string(REGEX REPLACE "[^A-Za-z_0-9]" "_" SANITIZED_FLAG ${SANITIZED_FLAG})
-  string(REGEX REPLACE "_+" "_" SANITIZED_FLAG ${SANITIZED_FLAG})
-  set(${OUTPUT} "${SANITIZED_FLAG}" PARENT_SCOPE)
-endfunction(mangle_compiler_flag)
-
-function(add_cxx_compiler_flag FLAG)
-  mangle_compiler_flag("${FLAG}" MANGLED_FLAG)
-  set(OLD_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")
-  set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} ${FLAG}")
-  check_cxx_compiler_flag("${FLAG}" ${MANGLED_FLAG})
-  set(CMAKE_REQUIRED_FLAGS "${OLD_CMAKE_REQUIRED_FLAGS}")
-  if(${MANGLED_FLAG})
-    set(VARIANT ${ARGV1})
-    if(ARGV1)
-      string(TOUPPER "_${VARIANT}" VARIANT)
-    endif()
-    set(CMAKE_CXX_FLAGS${VARIANT} "${CMAKE_CXX_FLAGS${VARIANT}} ${BENCHMARK_CXX_FLAGS${VARIANT}} ${FLAG}" PARENT_SCOPE)
-  endif()
-endfunction()
-
-function(add_required_cxx_compiler_flag FLAG)
-  mangle_compiler_flag("${FLAG}" MANGLED_FLAG)
-  set(OLD_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")
-  set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} ${FLAG}")
-  check_cxx_compiler_flag("${FLAG}" ${MANGLED_FLAG})
-  set(CMAKE_REQUIRED_FLAGS "${OLD_CMAKE_REQUIRED_FLAGS}")
-  if(${MANGLED_FLAG})
-    set(VARIANT ${ARGV1})
-    if(ARGV1)
-      string(TOUPPER "_${VARIANT}" VARIANT)
-    endif()
-    set(CMAKE_CXX_FLAGS${VARIANT} "${CMAKE_CXX_FLAGS${VARIANT}} ${FLAG}" PARENT_SCOPE)
-    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${FLAG}" PARENT_SCOPE)
-    set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} ${FLAG}" PARENT_SCOPE)
-    set(CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS} ${FLAG}" PARENT_SCOPE)
-    set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} ${FLAG}" PARENT_SCOPE)
-  else()
-    message(FATAL_ERROR "Required flag '${FLAG}' is not supported by the compiler")
-  endif()
-endfunction()
-
-function(check_cxx_warning_flag FLAG)
-  mangle_compiler_flag("${FLAG}" MANGLED_FLAG)
-  set(OLD_CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS}")
-  # Add -Werror to ensure the compiler generates an error if the warning flag
-  # doesn't exist.
-  set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -Werror ${FLAG}")
-  check_cxx_compiler_flag("${FLAG}" ${MANGLED_FLAG})
-  set(CMAKE_REQUIRED_FLAGS "${OLD_CMAKE_REQUIRED_FLAGS}")
-endfunction()
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/cmake/CXXFeatureCheck.cmake b/gnu/llvm/libcxx/utils/google-benchmark/cmake/CXXFeatureCheck.cmake
deleted file mode 100644
index 99b56dd6239..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/cmake/CXXFeatureCheck.cmake
+++ /dev/null
@@ -1,64 +0,0 @@
-# - Compile and run code to check for C++ features
-#
-# This functions compiles a source file under the `cmake` folder
-# and adds the corresponding `HAVE_[FILENAME]` flag to the CMake
-# environment
-#
-#  cxx_feature_check(<FLAG> [<VARIANT>])
-#
-# - Example
-#
-# include(CXXFeatureCheck)
-# cxx_feature_check(STD_REGEX)
-# Requires CMake 2.8.12+
-
-if(__cxx_feature_check)
-  return()
-endif()
-set(__cxx_feature_check INCLUDED)
-
-function(cxx_feature_check FILE)
-  string(TOLOWER ${FILE} FILE)
-  string(TOUPPER ${FILE} VAR)
-  string(TOUPPER "HAVE_${VAR}" FEATURE)
-  if (DEFINED HAVE_${VAR})
-    set(HAVE_${VAR} 1 PARENT_SCOPE)
-    add_definitions(-DHAVE_${VAR})
-    return()
-  endif()
-
-  if (NOT DEFINED COMPILE_${FEATURE})
-    message(STATUS "Performing Test ${FEATURE}")
-    if(CMAKE_CROSSCOMPILING)
-      try_compile(COMPILE_${FEATURE}
-              ${CMAKE_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/cmake/${FILE}.cpp
-              CMAKE_FLAGS ${BENCHMARK_CXX_LINKER_FLAGS}
-              LINK_LIBRARIES ${BENCHMARK_CXX_LIBRARIES})
-      if(COMPILE_${FEATURE})
-        message(WARNING
-              "If you see build failures due to cross compilation, try setting HAVE_${VAR} to 0")
-        set(RUN_${FEATURE} 0)
-      else()
-        set(RUN_${FEATURE} 1)
-      endif()
-    else()
-      message(STATUS "Performing Test ${FEATURE}")
-      try_run(RUN_${FEATURE} COMPILE_${FEATURE}
-              ${CMAKE_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/cmake/${FILE}.cpp
-              CMAKE_FLAGS ${BENCHMARK_CXX_LINKER_FLAGS}
-              LINK_LIBRARIES ${BENCHMARK_CXX_LIBRARIES})
-    endif()
-  endif()
-
-  if(RUN_${FEATURE} EQUAL 0)
-    message(STATUS "Performing Test ${FEATURE} -- success")
-    set(HAVE_${VAR} 1 PARENT_SCOPE)
-    add_definitions(-DHAVE_${VAR})
-  else()
-    if(NOT COMPILE_${FEATURE})
-      message(STATUS "Performing Test ${FEATURE} -- failed to compile")
-    else()
-      message(STATUS "Performing Test ${FEATURE} -- compiled but failed to run")
-    endif()
-  endif()
-endfunction()
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/cmake/Config.cmake.in b/gnu/llvm/libcxx/utils/google-benchmark/cmake/Config.cmake.in
deleted file mode 100644
index 6e9256eea8a..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/cmake/Config.cmake.in
+++ /dev/null
@@ -1 +0,0 @@
-include("${CMAKE_CURRENT_LIST_DIR}/@targets_export_name@.cmake")
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/cmake/GetGitVersion.cmake b/gnu/llvm/libcxx/utils/google-benchmark/cmake/GetGitVersion.cmake
deleted file mode 100644
index 4f10f226d7a..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/cmake/GetGitVersion.cmake
+++ /dev/null
@@ -1,54 +0,0 @@
-# - Returns a version string from Git tags
-#
-# This function inspects the annotated git tags for the project and returns a string
-# into a CMake variable
-#
-#  get_git_version(<var>)
-#
-# - Example
-#
-# include(GetGitVersion)
-# get_git_version(GIT_VERSION)
-#
-# Requires CMake 2.8.11+
-find_package(Git)
-
-if(__get_git_version)
-  return()
-endif()
-set(__get_git_version INCLUDED)
-
-function(get_git_version var)
-  if(GIT_EXECUTABLE)
-      execute_process(COMMAND ${GIT_EXECUTABLE} describe --match "v[0-9]*.[0-9]*.[0-9]*" --abbrev=8
-          WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
-          RESULT_VARIABLE status
-          OUTPUT_VARIABLE GIT_VERSION
-          ERROR_QUIET)
-      if(${status})
-          set(GIT_VERSION "v0.0.0")
-      else()
-          string(STRIP ${GIT_VERSION} GIT_VERSION)
-          string(REGEX REPLACE "-[0-9]+-g" "-" GIT_VERSION ${GIT_VERSION})
-      endif()
-
-      # Work out if the repository is dirty
-      execute_process(COMMAND ${GIT_EXECUTABLE} update-index -q --refresh
-          WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
-          OUTPUT_QUIET
-          ERROR_QUIET)
-      execute_process(COMMAND ${GIT_EXECUTABLE} diff-index --name-only HEAD --
-          WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
-          OUTPUT_VARIABLE GIT_DIFF_INDEX
-          ERROR_QUIET)
-      string(COMPARE NOTEQUAL "${GIT_DIFF_INDEX}" "" GIT_DIRTY)
-      if (${GIT_DIRTY})
-          set(GIT_VERSION "${GIT_VERSION}-dirty")
-      endif()
-  else()
-      set(GIT_VERSION "v0.0.0")
-  endif()
-
-  message(STATUS "git Version: ${GIT_VERSION}")
-  set(${var} ${GIT_VERSION} PARENT_SCOPE)
-endfunction()
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/cmake/GoogleTest.cmake b/gnu/llvm/libcxx/utils/google-benchmark/cmake/GoogleTest.cmake
deleted file mode 100644
index dd611fc875f..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/cmake/GoogleTest.cmake
+++ /dev/null
@@ -1,41 +0,0 @@
-# Download and unpack googletest at configure time
-set(GOOGLETEST_PREFIX "${benchmark_BINARY_DIR}/third_party/googletest")
-configure_file(${benchmark_SOURCE_DIR}/cmake/GoogleTest.cmake.in ${GOOGLETEST_PREFIX}/CMakeLists.txt @ONLY)
-
-set(GOOGLETEST_PATH "${CMAKE_CURRENT_SOURCE_DIR}/googletest" CACHE PATH "") # Mind the quotes
-execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}"
-  -DALLOW_DOWNLOADING_GOOGLETEST=${BENCHMARK_DOWNLOAD_DEPENDENCIES} -DGOOGLETEST_PATH:PATH=${GOOGLETEST_PATH} .
-  RESULT_VARIABLE result
-  WORKING_DIRECTORY ${GOOGLETEST_PREFIX}
-)
-
-if(result)
-  message(FATAL_ERROR "CMake step for googletest failed: ${result}")
-endif()
-
-execute_process(
-  COMMAND ${CMAKE_COMMAND} --build .
-  RESULT_VARIABLE result
-  WORKING_DIRECTORY ${GOOGLETEST_PREFIX}
-)
-
-if(result)
-  message(FATAL_ERROR "Build step for googletest failed: ${result}")
-endif()
-
-# Prevent overriding the parent project's compiler/linker
-# settings on Windows
-set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
-
-include(${GOOGLETEST_PREFIX}/googletest-paths.cmake)
-
-# Add googletest directly to our build. This defines
-# the gtest and gtest_main targets.
-add_subdirectory(${GOOGLETEST_SOURCE_DIR}
-                 ${GOOGLETEST_BINARY_DIR}
-                 EXCLUDE_FROM_ALL)
-
-set_target_properties(gtest PROPERTIES INTERFACE_SYSTEM_INCLUDE_DIRECTORIES $<TARGET_PROPERTY:gtest,INTERFACE_INCLUDE_DIRECTORIES>)
-set_target_properties(gtest_main PROPERTIES INTERFACE_SYSTEM_INCLUDE_DIRECTORIES $<TARGET_PROPERTY:gtest_main,INTERFACE_INCLUDE_DIRECTORIES>)
-set_target_properties(gmock PROPERTIES INTERFACE_SYSTEM_INCLUDE_DIRECTORIES $<TARGET_PROPERTY:gmock,INTERFACE_INCLUDE_DIRECTORIES>)
-set_target_properties(gmock_main PROPERTIES INTERFACE_SYSTEM_INCLUDE_DIRECTORIES $<TARGET_PROPERTY:gmock_main,INTERFACE_INCLUDE_DIRECTORIES>)
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/cmake/GoogleTest.cmake.in b/gnu/llvm/libcxx/utils/google-benchmark/cmake/GoogleTest.cmake.in
deleted file mode 100644
index fd957ff5640..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/cmake/GoogleTest.cmake.in
+++ /dev/null
@@ -1,58 +0,0 @@
-cmake_minimum_required(VERSION 2.8.12)
-
-project(googletest-download NONE)
-
-# Enable ExternalProject CMake module
-include(ExternalProject)
-
-option(ALLOW_DOWNLOADING_GOOGLETEST "If googletest src tree is not found in location specified by GOOGLETEST_PATH, do fetch the archive from internet" OFF)
-set(GOOGLETEST_PATH "/usr/src/googletest" CACHE PATH
-                    "Path to the googletest root tree. Should contain googletest and googlemock subdirs. And CMakeLists.txt in root, and in both of these subdirs")
-
-# Download and install GoogleTest
-
-message(STATUS "Looking for Google Test sources")
-message(STATUS "Looking for Google Test sources in ${GOOGLETEST_PATH}")
-if(EXISTS "${GOOGLETEST_PATH}"            AND IS_DIRECTORY "${GOOGLETEST_PATH}"            AND EXISTS "${GOOGLETEST_PATH}/CMakeLists.txt" AND
-   EXISTS "${GOOGLETEST_PATH}/googletest" AND IS_DIRECTORY "${GOOGLETEST_PATH}/googletest" AND EXISTS "${GOOGLETEST_PATH}/googletest/CMakeLists.txt" AND
-   EXISTS "${GOOGLETEST_PATH}/googlemock" AND IS_DIRECTORY "${GOOGLETEST_PATH}/googlemock" AND EXISTS "${GOOGLETEST_PATH}/googlemock/CMakeLists.txt")
-  message(STATUS "Found Google Test in ${GOOGLETEST_PATH}")
-
-  ExternalProject_Add(
-    googletest
-    PREFIX            "${CMAKE_BINARY_DIR}"
-    DOWNLOAD_DIR      "${CMAKE_BINARY_DIR}/download"
-    SOURCE_DIR        "${GOOGLETEST_PATH}" # use existing src dir.
-    BINARY_DIR        "${CMAKE_BINARY_DIR}/build"
-    CONFIGURE_COMMAND ""
-    BUILD_COMMAND     ""
-    INSTALL_COMMAND   ""
-    TEST_COMMAND      ""
-  )
-else()
-  if(NOT ALLOW_DOWNLOADING_GOOGLETEST)
-    message(SEND_ERROR "Did not find Google Test sources! Either pass correct path in GOOGLETEST_PATH, or enable BENCHMARK_DOWNLOAD_DEPENDENCIES, or disable BENCHMARK_ENABLE_GTEST_TESTS / BENCHMARK_ENABLE_TESTING.")
-  else()
-    message(WARNING "Did not find Google Test sources! Fetching from web...")
-    ExternalProject_Add(
-      googletest
-      GIT_REPOSITORY    https://github.com/google/googletest.git
-      GIT_TAG           master
-      PREFIX            "${CMAKE_BINARY_DIR}"
-      STAMP_DIR         "${CMAKE_BINARY_DIR}/stamp"
-      DOWNLOAD_DIR      "${CMAKE_BINARY_DIR}/download"
-      SOURCE_DIR        "${CMAKE_BINARY_DIR}/src"
-      BINARY_DIR        "${CMAKE_BINARY_DIR}/build"
-      CONFIGURE_COMMAND ""
-      BUILD_COMMAND     ""
-      INSTALL_COMMAND   ""
-      TEST_COMMAND      ""
-    )
-  endif()
-endif()
-
-ExternalProject_Get_Property(googletest SOURCE_DIR BINARY_DIR)
-file(WRITE googletest-paths.cmake
-"set(GOOGLETEST_SOURCE_DIR \"${SOURCE_DIR}\")
-set(GOOGLETEST_BINARY_DIR \"${BINARY_DIR}\")
-")
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/cmake/benchmark.pc.in b/gnu/llvm/libcxx/utils/google-benchmark/cmake/benchmark.pc.in
deleted file mode 100644
index 1e84bff68d8..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/cmake/benchmark.pc.in
+++ /dev/null
@@ -1,11 +0,0 @@
-prefix=@CMAKE_INSTALL_PREFIX@
-exec_prefix=${prefix}
-libdir=${prefix}/lib
-includedir=${prefix}/include
-
-Name: @PROJECT_NAME@
-Description: Google microbenchmark framework
-Version: @VERSION@
-
-Libs: -L${libdir} -lbenchmark
-Cflags: -I${includedir}
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/cmake/gnu_posix_regex.cpp b/gnu/llvm/libcxx/utils/google-benchmark/cmake/gnu_posix_regex.cpp
deleted file mode 100644
index 105189f02ee..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/cmake/gnu_posix_regex.cpp
+++ /dev/null
@@ -1,11 +0,0 @@
-#include <gnuregex.h>
-#include <string>
-int main() {
-  std::string str = "test0159";
-  regex_t re;
-  int ec = regcomp(&re, "^[a-z]+[0-9]+$", REG_EXTENDED | REG_NOSUB);
-  if (ec != 0) {
-    return ec;
-  }
-  return regexec(&re, str.c_str(), 0, nullptr, 0) ? -1 : 0;
-}
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/cmake/llvm-toolchain.cmake b/gnu/llvm/libcxx/utils/google-benchmark/cmake/llvm-toolchain.cmake
deleted file mode 100644
index fc119e52fd2..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/cmake/llvm-toolchain.cmake
+++ /dev/null
@@ -1,8 +0,0 @@
-find_package(LLVMAr REQUIRED)
-set(CMAKE_AR "${LLVMAR_EXECUTABLE}" CACHE FILEPATH "" FORCE)
-
-find_package(LLVMNm REQUIRED)
-set(CMAKE_NM "${LLVMNM_EXECUTABLE}" CACHE FILEPATH "" FORCE)
-
-find_package(LLVMRanLib REQUIRED)
-set(CMAKE_RANLIB "${LLVMRANLIB_EXECUTABLE}" CACHE FILEPATH "" FORCE)
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/cmake/posix_regex.cpp b/gnu/llvm/libcxx/utils/google-benchmark/cmake/posix_regex.cpp
deleted file mode 100644
index 02f6dfc278a..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/cmake/posix_regex.cpp
+++ /dev/null
@@ -1,13 +0,0 @@
-#include <regex.h>
-#include <string>
-int main() {
-  std::string str = "test0159";
-  regex_t re;
-  int ec = regcomp(&re, "^[a-z]+[0-9]+$", REG_EXTENDED | REG_NOSUB);
-  if (ec != 0) {
-    return ec;
-  }
-  int ret = regexec(&re, str.c_str(), 0, nullptr, 0) ? -1 : 0;
-  regfree(&re);
-  return ret;
-}
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/cmake/split_list.cmake b/gnu/llvm/libcxx/utils/google-benchmark/cmake/split_list.cmake
deleted file mode 100644
index 67aed3fdc85..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/cmake/split_list.cmake
+++ /dev/null
@@ -1,3 +0,0 @@
-macro(split_list listname)
-  string(REPLACE ";" " " ${listname} "${${listname}}")
-endmacro()
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/cmake/std_regex.cpp b/gnu/llvm/libcxx/utils/google-benchmark/cmake/std_regex.cpp
deleted file mode 100644
index 8177c482e83..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/cmake/std_regex.cpp
+++ /dev/null
@@ -1,9 +0,0 @@
-#include <regex>
-#include <string>
-int main() {
-  const std::string str = "test0159";
-  std::regex re;
-  re = std::regex("^[a-z]+[0-9]+$",
-       std::regex_constants::extended | std::regex_constants::nosubs);
-  return std::regex_search(str, re) ? 0 : -1;
-}
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/cmake/steady_clock.cpp b/gnu/llvm/libcxx/utils/google-benchmark/cmake/steady_clock.cpp
deleted file mode 100644
index 66d50d17e9e..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/cmake/steady_clock.cpp
+++ /dev/null
@@ -1,7 +0,0 @@
-#include <chrono>
-
-int main() {
-    typedef std::chrono::steady_clock Clock;
-    Clock::time_point tp = Clock::now();
-    ((void)tp);
-}
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/cmake/thread_safety_attributes.cpp b/gnu/llvm/libcxx/utils/google-benchmark/cmake/thread_safety_attributes.cpp
deleted file mode 100644
index 46161babdb1..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/cmake/thread_safety_attributes.cpp
+++ /dev/null
@@ -1,4 +0,0 @@
-#define HAVE_THREAD_SAFETY_ATTRIBUTES
-#include "../src/mutex.h"
-
-int main() {}
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/dependencies.md b/gnu/llvm/libcxx/utils/google-benchmark/dependencies.md
deleted file mode 100644
index 6289b4e3548..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/dependencies.md
+++ /dev/null
@@ -1,18 +0,0 @@
-# Build tool dependency policy
-
-To ensure the broadest compatibility when building the benchmark library, but
-still allow forward progress, we require any build tooling to be available for:
-
-* Debian stable AND
-* The last two Ubuntu LTS releases AND
-
-Currently, this means using build tool versions that are available for Ubuntu
-16.04 (Xenial), Ubuntu 18.04 (Bionic), and Debian stretch.
-
-_Note, [travis](.travis.yml) runs under Ubuntu 14.04 (Trusty) for linux builds._
-
-## cmake
-The current supported version is cmake 3.5.1 as of 2018-06-06.
-
-_Note, this version is also available for Ubuntu 14.04, the previous Ubuntu LTS
-release, as `cmake3`._
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/docs/AssemblyTests.md b/gnu/llvm/libcxx/utils/google-benchmark/docs/AssemblyTests.md
deleted file mode 100644
index 0d06f50ac65..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/docs/AssemblyTests.md
+++ /dev/null
@@ -1,146 +0,0 @@
-# Assembly Tests
-
-The Benchmark library provides a number of functions whose primary
-purpose in to affect assembly generation, including `DoNotOptimize`
-and `ClobberMemory`. In addition there are other functions,
-such as `KeepRunning`, for which generating good assembly is paramount.
-
-For these functions it's important to have tests that verify the
-correctness and quality of the implementation. This requires testing
-the code generated by the compiler.
-
-This document describes how the Benchmark library tests compiler output,
-as well as how to properly write new tests.
-
-
-## Anatomy of a Test
-
-Writing a test has two steps:
-
-* Write the code you want to generate assembly for.
-* Add `// CHECK` lines to match against the verified assembly.
-
-Example:
-```c++
-
-// CHECK-LABEL: test_add:
-extern "C" int test_add() {
-    extern int ExternInt;
-    return ExternInt + 1;
-
-    // CHECK: movl ExternInt(%rip), %eax
-    // CHECK: addl %eax
-    // CHECK: ret
-}
-
-```
-
-#### LLVM Filecheck
-
-[LLVM's Filecheck](https://llvm.org/docs/CommandGuide/FileCheck.html)
-is used to test the generated assembly against the `// CHECK` lines
-specified in the tests source file. Please see the documentation
-linked above for information on how to write `CHECK` directives.
-
-#### Tips and Tricks:
-
-* Tests should match the minimal amount of output required to establish
-correctness. `CHECK` directives don't have to match on the exact next line
-after the previous match, so tests should omit checks for unimportant
-bits of assembly. ([`CHECK-NEXT`](https://llvm.org/docs/CommandGuide/FileCheck.html#the-check-next-directive)
-can be used to ensure a match occurs exactly after the previous match).
-
-* The tests are compiled with `-O3 -g0`. So we're only testing the
-optimized output.
-
-* The assembly output is further cleaned up using `tools/strip_asm.py`.
-This removes comments, assembler directives, and unused labels before
-the test is run.
-
-* The generated and stripped assembly file for a test is output under
-`<build-directory>/test/<test-name>.s`
-
-* Filecheck supports using [`CHECK` prefixes](https://llvm.org/docs/CommandGuide/FileCheck.html#cmdoption-check-prefixes)
-to specify lines that should only match in certain situations.
-The Benchmark tests use `CHECK-CLANG` and `CHECK-GNU` for lines that
-are only expected to match Clang or GCC's output respectively. Normal
-`CHECK` lines match against all compilers. (Note: `CHECK-NOT` and
-`CHECK-LABEL` are NOT prefixes. They are versions of non-prefixed
-`CHECK` lines)
-
-* Use `extern "C"` to disable name mangling for specific functions. This
-makes them easier to name in the `CHECK` lines.
-
-
-## Problems Writing Portable Tests
-
-Writing tests which check the code generated by a compiler are
-inherently non-portable. Different compilers and even different compiler
-versions may generate entirely different code. The Benchmark tests
-must tolerate this.
-
-LLVM Filecheck provides a number of mechanisms to help write
-"more portable" tests; including [matching using regular expressions](https://llvm.org/docs/CommandGuide/FileCheck.html#filecheck-pattern-matching-syntax),
-allowing the creation of [named variables](https://llvm.org/docs/CommandGuide/FileCheck.html#filecheck-variables)
-for later matching, and [checking non-sequential matches](https://llvm.org/docs/CommandGuide/FileCheck.html#the-check-dag-directive).
-
-#### Capturing Variables
-
-For example, say GCC stores a variable in a register but Clang stores
-it in memory. To write a test that tolerates both cases we "capture"
-the destination of the store, and then use the captured expression
-to write the remainder of the test.
-
-```c++
-// CHECK-LABEL: test_div_no_op_into_shr:
-extern "C" void test_div_no_op_into_shr(int value) {
-    int divisor = 2;
-    benchmark::DoNotOptimize(divisor); // hide the value from the optimizer
-    return value / divisor;
-
-    // CHECK: movl $2, [[DEST:.*]]
-    // CHECK: idivl [[DEST]]
-    // CHECK: ret
-}
-```
-
-#### Using Regular Expressions to Match Differing Output
-
-Often tests require testing assembly lines which may subtly differ
-between compilers or compiler versions. A common example of this
-is matching stack frame addresses. In this case regular expressions
-can be used to match the differing bits of output. For example:
-
-```c++
-int ExternInt;
-struct Point { int x, y, z; };
-
-// CHECK-LABEL: test_store_point:
-extern "C" void test_store_point() {
-    Point p{ExternInt, ExternInt, ExternInt};
-    benchmark::DoNotOptimize(p);
-
-    // CHECK: movl ExternInt(%rip), %eax
-    // CHECK: movl %eax, -{{[0-9]+}}(%rsp)
-    // CHECK: movl %eax, -{{[0-9]+}}(%rsp)
-    // CHECK: movl %eax, -{{[0-9]+}}(%rsp)
-    // CHECK: ret
-}
-```
-
-## Current Requirements and Limitations
-
-The tests require Filecheck to be installed along the `PATH` of the
-build machine. Otherwise the tests will be disabled.
-
-Additionally, as mentioned in the previous section, codegen tests are
-inherently non-portable. Currently the tests are limited to:
-
-* x86_64 targets.
-* Compiled with GCC or Clang
-
-Further work could be done, at least on a limited basis, to extend the
-tests to other architectures and compilers (using `CHECK` prefixes).
-
-Furthermore, the tests fail for builds which specify additional flags
-that modify code generation, including `--coverage` or `-fsanitize=`.
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/docs/_config.yml b/gnu/llvm/libcxx/utils/google-benchmark/docs/_config.yml
deleted file mode 100644
index fc24e7a62dc..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/docs/_config.yml
+++ /dev/null
@@ -1 +0,0 @@
-theme: jekyll-theme-hacker
\ No newline at end of file
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/docs/perf_counters.md b/gnu/llvm/libcxx/utils/google-benchmark/docs/perf_counters.md
deleted file mode 100644
index 74560e96697..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/docs/perf_counters.md
+++ /dev/null
@@ -1,34 +0,0 @@
-<a name="perf-counters" />
-
-# User-Requested Performance Counters
-
-When running benchmarks, the user may choose to request collection of
-performance counters. This may be useful in investigation scenarios - narrowing
-down the cause of a regression; or verifying that the underlying cause of a
-performance improvement matches expectations.
-
-This feature is available if:
-
-* The benchmark is run on an architecture featuring a Performance Monitoring
-  Unit (PMU),
-* The benchmark is compiled with support for collecting counters. Currently,
-  this requires [libpfm](http://perfmon2.sourceforge.net/) be available at build
-  time
-
-The feature does not require modifying benchmark code. Counter collection is
-handled at the boundaries where timer collection is also handled. 
-
-To opt-in:
-
-*  Install `libpfm4-dev`, e.g. `apt-get install libpfm4-dev`.
-*  Enable the cmake flag BENCHMARK_ENABLE_LIBPFM.
-
-To use, pass a comma-separated list of counter names through the
-`--benchmark_perf_counters` flag. The names are decoded through libpfm - meaning,
-they are platform specific, but some (e.g. `CYCLES` or `INSTRUCTIONS`) are
-mapped by libpfm to platform-specifics - see libpfm
-[documentation](http://perfmon2.sourceforge.net/docs.html) for more details.
-
-The counter values are reported back through the [User Counters](../README.md#custom-counters)
-mechanism, meaning, they are available in all the formats (e.g. JSON) supported
-by User Counters.
\ No newline at end of file
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/docs/random_interleaving.md b/gnu/llvm/libcxx/utils/google-benchmark/docs/random_interleaving.md
deleted file mode 100644
index c0830368414..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/docs/random_interleaving.md
+++ /dev/null
@@ -1,13 +0,0 @@
-<a name="interleaving" />
-
-# Random Interleaving
-
-[Random Interleaving](https://github.com/google/benchmark/issues/1051) is a
-technique to lower run-to-run variance. It randomly interleaves repetitions of a
-microbenchmark with repetitions from other microbenchmarks in the same benchmark
-test. Data shows it is able to lower run-to-run variance by
-[40%](https://github.com/google/benchmark/issues/1051) on average.
-
-To use, you mainly need to set `--benchmark_enable_random_interleaving=true`,
-and optionally specify non-zero repetition count `--benchmark_repetitions=9`
-and optionally decrease the per-repetition time `--benchmark_min_time=0.1`.
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/docs/releasing.md b/gnu/llvm/libcxx/utils/google-benchmark/docs/releasing.md
deleted file mode 100644
index 7a6dfc4017b..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/docs/releasing.md
+++ /dev/null
@@ -1,22 +0,0 @@
-# How to release
-
-* Make sure you're on main and synced to HEAD
-* Ensure the project builds and tests run (sanity check only, obviously)
-    * `parallel -j0 exec ::: test/*_test` can help ensure everything at least
-      passes
-* Prepare release notes
-    * `git log $(git describe --abbrev=0 --tags)..HEAD` gives you the list of
-      commits between the last annotated tag and HEAD
-    * Pick the most interesting.
-* Create one last commit that updates the version saved in `CMakeLists.txt` to the release version you're creating. (This version will be used if benchmark is installed from the archive you'll be creating in the next step.)
-
-```
-project (benchmark VERSION 1.5.3 LANGUAGES CXX)
-```
-
-* Create a release through github's interface
-    * Note this will create a lightweight tag.
-    * Update this to an annotated tag:
-      * `git pull --tags`
-      * `git tag -a -f <tag> <tag>`
-      * `git push --force origin`
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/docs/tools.md b/gnu/llvm/libcxx/utils/google-benchmark/docs/tools.md
deleted file mode 100644
index 4a3b2e9bd2c..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/docs/tools.md
+++ /dev/null
@@ -1,199 +0,0 @@
-# Benchmark Tools
-
-## compare.py
-
-The `compare.py` can be used to compare the result of benchmarks.
-
-**NOTE**: the utility relies on the scipy package which can be installed using [these instructions](https://www.scipy.org/install.html).
-
-### Displaying aggregates only
-
-The switch `-a` / `--display_aggregates_only` can be used to control the
-displayment of the normal iterations vs the aggregates. When passed, it will
-be passthrough to the benchmark binaries to be run, and will be accounted for
-in the tool itself; only the aggregates will be displayed, but not normal runs.
-It only affects the display, the separate runs will still be used to calculate
-the U test.
-
-### Modes of operation
-
-There are three modes of operation:
-
-1. Just compare two benchmarks
-The program is invoked like:
-
-``` bash
-$ compare.py benchmarks <benchmark_baseline> <benchmark_contender> [benchmark options]...
-```
-Where `<benchmark_baseline>` and `<benchmark_contender>` either specify a benchmark executable file, or a JSON output file. The type of the input file is automatically detected. If a benchmark executable is specified then the benchmark is run to obtain the results. Otherwise the results are simply loaded from the output file.
-
-`[benchmark options]` will be passed to the benchmarks invocations. They can be anything that binary accepts, be it either normal `--benchmark_*` parameters, or some custom parameters your binary takes.
-
-Example output:
-```
-$ ./compare.py benchmarks ./a.out ./a.out
-RUNNING: ./a.out --benchmark_out=/tmp/tmprBT5nW
-Run on (8 X 4000 MHz CPU s)
-2017-11-07 21:16:44
-------------------------------------------------------
-Benchmark               Time           CPU Iterations
-------------------------------------------------------
-BM_memcpy/8            36 ns         36 ns   19101577   211.669MB/s
-BM_memcpy/64           76 ns         76 ns    9412571   800.199MB/s
-BM_memcpy/512          84 ns         84 ns    8249070   5.64771GB/s
-BM_memcpy/1024        116 ns        116 ns    6181763   8.19505GB/s
-BM_memcpy/8192        643 ns        643 ns    1062855   11.8636GB/s
-BM_copy/8             222 ns        222 ns    3137987   34.3772MB/s
-BM_copy/64           1608 ns       1608 ns     432758   37.9501MB/s
-BM_copy/512         12589 ns      12589 ns      54806   38.7867MB/s
-BM_copy/1024        25169 ns      25169 ns      27713   38.8003MB/s
-BM_copy/8192       201165 ns     201112 ns       3486   38.8466MB/s
-RUNNING: ./a.out --benchmark_out=/tmp/tmpt1wwG_
-Run on (8 X 4000 MHz CPU s)
-2017-11-07 21:16:53
-------------------------------------------------------
-Benchmark               Time           CPU Iterations
-------------------------------------------------------
-BM_memcpy/8            36 ns         36 ns   19397903   211.255MB/s
-BM_memcpy/64           73 ns         73 ns    9691174   839.635MB/s
-BM_memcpy/512          85 ns         85 ns    8312329   5.60101GB/s
-BM_memcpy/1024        118 ns        118 ns    6438774   8.11608GB/s
-BM_memcpy/8192        656 ns        656 ns    1068644   11.6277GB/s
-BM_copy/8             223 ns        223 ns    3146977   34.2338MB/s
-BM_copy/64           1611 ns       1611 ns     435340   37.8751MB/s
-BM_copy/512         12622 ns      12622 ns      54818   38.6844MB/s
-BM_copy/1024        25257 ns      25239 ns      27779   38.6927MB/s
-BM_copy/8192       205013 ns     205010 ns       3479    38.108MB/s
-Comparing ./a.out to ./a.out
-Benchmark                 Time             CPU      Time Old      Time New       CPU Old       CPU New
-------------------------------------------------------------------------------------------------------
-BM_memcpy/8            +0.0020         +0.0020            36            36            36            36
-BM_memcpy/64           -0.0468         -0.0470            76            73            76            73
-BM_memcpy/512          +0.0081         +0.0083            84            85            84            85
-BM_memcpy/1024         +0.0098         +0.0097           116           118           116           118
-BM_memcpy/8192         +0.0200         +0.0203           643           656           643           656
-BM_copy/8              +0.0046         +0.0042           222           223           222           223
-BM_copy/64             +0.0020         +0.0020          1608          1611          1608          1611
-BM_copy/512            +0.0027         +0.0026         12589         12622         12589         12622
-BM_copy/1024           +0.0035         +0.0028         25169         25257         25169         25239
-BM_copy/8192           +0.0191         +0.0194        201165        205013        201112        205010
-```
-
-What it does is for the every benchmark from the first run it looks for the benchmark with exactly the same name in the second run, and then compares the results. If the names differ, the benchmark is omitted from the diff.
-As you can note, the values in `Time` and `CPU` columns are calculated as `(new - old) / |old|`.
-
-2. Compare two different filters of one benchmark
-The program is invoked like:
-
-``` bash
-$ compare.py filters <benchmark> <filter_baseline> <filter_contender> [benchmark options]...
-```
-Where `<benchmark>` either specify a benchmark executable file, or a JSON output file. The type of the input file is automatically detected. If a benchmark executable is specified then the benchmark is run to obtain the results. Otherwise the results are simply loaded from the output file.
-
-Where `<filter_baseline>` and `<filter_contender>` are the same regex filters that you would pass to the `[--benchmark_filter=<regex>]` parameter of the benchmark binary.
-
-`[benchmark options]` will be passed to the benchmarks invocations. They can be anything that binary accepts, be it either normal `--benchmark_*` parameters, or some custom parameters your binary takes.
-
-Example output:
-```
-$ ./compare.py filters ./a.out BM_memcpy BM_copy
-RUNNING: ./a.out --benchmark_filter=BM_memcpy --benchmark_out=/tmp/tmpBWKk0k
-Run on (8 X 4000 MHz CPU s)
-2017-11-07 21:37:28
-------------------------------------------------------
-Benchmark               Time           CPU Iterations
-------------------------------------------------------
-BM_memcpy/8            36 ns         36 ns   17891491   211.215MB/s
-BM_memcpy/64           74 ns         74 ns    9400999   825.646MB/s
-BM_memcpy/512          87 ns         87 ns    8027453   5.46126GB/s
-BM_memcpy/1024        111 ns        111 ns    6116853    8.5648GB/s
-BM_memcpy/8192        657 ns        656 ns    1064679   11.6247GB/s
-RUNNING: ./a.out --benchmark_filter=BM_copy --benchmark_out=/tmp/tmpAvWcOM
-Run on (8 X 4000 MHz CPU s)
-2017-11-07 21:37:33
-----------------------------------------------------
-Benchmark             Time           CPU Iterations
-----------------------------------------------------
-BM_copy/8           227 ns        227 ns    3038700   33.6264MB/s
-BM_copy/64         1640 ns       1640 ns     426893   37.2154MB/s
-BM_copy/512       12804 ns      12801 ns      55417   38.1444MB/s
-BM_copy/1024      25409 ns      25407 ns      27516   38.4365MB/s
-BM_copy/8192     202986 ns     202990 ns       3454   38.4871MB/s
-Comparing BM_memcpy to BM_copy (from ./a.out)
-Benchmark                               Time             CPU      Time Old      Time New       CPU Old       CPU New
---------------------------------------------------------------------------------------------------------------------
-[BM_memcpy vs. BM_copy]/8            +5.2829         +5.2812            36           227            36           227
-[BM_memcpy vs. BM_copy]/64          +21.1719        +21.1856            74          1640            74          1640
-[BM_memcpy vs. BM_copy]/512        +145.6487       +145.6097            87         12804            87         12801
-[BM_memcpy vs. BM_copy]/1024       +227.1860       +227.1776           111         25409           111         25407
-[BM_memcpy vs. BM_copy]/8192       +308.1664       +308.2898           657        202986           656        202990
-```
-
-As you can see, it applies filter to the benchmarks, both when running the benchmark, and before doing the diff. And to make the diff work, the matches are replaced with some common string. Thus, you can compare two different benchmark families within one benchmark binary.
-As you can note, the values in `Time` and `CPU` columns are calculated as `(new - old) / |old|`.
-
-3. Compare filter one from benchmark one to filter two from benchmark two:
-The program is invoked like:
-
-``` bash
-$ compare.py filters <benchmark_baseline> <filter_baseline> <benchmark_contender> <filter_contender> [benchmark options]...
-```
-
-Where `<benchmark_baseline>` and `<benchmark_contender>` either specify a benchmark executable file, or a JSON output file. The type of the input file is automatically detected. If a benchmark executable is specified then the benchmark is run to obtain the results. Otherwise the results are simply loaded from the output file.
-
-Where `<filter_baseline>` and `<filter_contender>` are the same regex filters that you would pass to the `[--benchmark_filter=<regex>]` parameter of the benchmark binary.
-
-`[benchmark options]` will be passed to the benchmarks invocations. They can be anything that binary accepts, be it either normal `--benchmark_*` parameters, or some custom parameters your binary takes.
-
-Example output:
-```
-$ ./compare.py benchmarksfiltered ./a.out BM_memcpy ./a.out BM_copy
-RUNNING: ./a.out --benchmark_filter=BM_memcpy --benchmark_out=/tmp/tmp_FvbYg
-Run on (8 X 4000 MHz CPU s)
-2017-11-07 21:38:27
-------------------------------------------------------
-Benchmark               Time           CPU Iterations
-------------------------------------------------------
-BM_memcpy/8            37 ns         37 ns   18953482   204.118MB/s
-BM_memcpy/64           74 ns         74 ns    9206578   828.245MB/s
-BM_memcpy/512          91 ns         91 ns    8086195   5.25476GB/s
-BM_memcpy/1024        120 ns        120 ns    5804513   7.95662GB/s
-BM_memcpy/8192        664 ns        664 ns    1028363   11.4948GB/s
-RUNNING: ./a.out --benchmark_filter=BM_copy --benchmark_out=/tmp/tmpDfL5iE
-Run on (8 X 4000 MHz CPU s)
-2017-11-07 21:38:32
-----------------------------------------------------
-Benchmark             Time           CPU Iterations
-----------------------------------------------------
-BM_copy/8           230 ns        230 ns    2985909   33.1161MB/s
-BM_copy/64         1654 ns       1653 ns     419408   36.9137MB/s
-BM_copy/512       13122 ns      13120 ns      53403   37.2156MB/s
-BM_copy/1024      26679 ns      26666 ns      26575   36.6218MB/s
-BM_copy/8192     215068 ns     215053 ns       3221   36.3283MB/s
-Comparing BM_memcpy (from ./a.out) to BM_copy (from ./a.out)
-Benchmark                               Time             CPU      Time Old      Time New       CPU Old       CPU New
---------------------------------------------------------------------------------------------------------------------
-[BM_memcpy vs. BM_copy]/8            +5.1649         +5.1637            37           230            37           230
-[BM_memcpy vs. BM_copy]/64          +21.4352        +21.4374            74          1654            74          1653
-[BM_memcpy vs. BM_copy]/512        +143.6022       +143.5865            91         13122            91         13120
-[BM_memcpy vs. BM_copy]/1024       +221.5903       +221.4790           120         26679           120         26666
-[BM_memcpy vs. BM_copy]/8192       +322.9059       +323.0096           664        215068           664        215053
-```
-This is a mix of the previous two modes, two (potentially different) benchmark binaries are run, and a different filter is applied to each one.
-As you can note, the values in `Time` and `CPU` columns are calculated as `(new - old) / |old|`.
-
-### U test
-
-If there is a sufficient repetition count of the benchmarks, the tool can do
-a [U Test](https://en.wikipedia.org/wiki/Mann%E2%80%93Whitney_U_test), of the
-null hypothesis that it is equally likely that a randomly selected value from
-one sample will be less than or greater than a randomly selected value from a
-second sample.
-
-If the calculated p-value is below this value is lower than the significance
-level alpha, then the result is said to be statistically significant and the
-null hypothesis is rejected. Which in other words means that the two benchmarks
-aren't identical.
-
-**WARNING**: requires **LARGE** (no less than 9) number of repetitions to be
-meaningful!
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/include/benchmark/benchmark.h b/gnu/llvm/libcxx/utils/google-benchmark/include/benchmark/benchmark.h
deleted file mode 100644
index a0fd7c6e1ca..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/include/benchmark/benchmark.h
+++ /dev/null
@@ -1,1551 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// Support for registering benchmarks for functions.
-
-/* Example usage:
-// Define a function that executes the code to be measured a
-// specified number of times:
-static void BM_StringCreation(benchmark::State& state) {
-  for (auto _ : state)
-    std::string empty_string;
-}
-
-// Register the function as a benchmark
-BENCHMARK(BM_StringCreation);
-
-// Define another benchmark
-static void BM_StringCopy(benchmark::State& state) {
-  std::string x = "hello";
-  for (auto _ : state)
-    std::string copy(x);
-}
-BENCHMARK(BM_StringCopy);
-
-// Augment the main() program to invoke benchmarks if specified
-// via the --benchmarks command line flag.  E.g.,
-//       my_unittest --benchmark_filter=all
-//       my_unittest --benchmark_filter=BM_StringCreation
-//       my_unittest --benchmark_filter=String
-//       my_unittest --benchmark_filter='Copy|Creation'
-int main(int argc, char** argv) {
-  benchmark::Initialize(&argc, argv);
-  benchmark::RunSpecifiedBenchmarks();
-  return 0;
-}
-
-// Sometimes a family of microbenchmarks can be implemented with
-// just one routine that takes an extra argument to specify which
-// one of the family of benchmarks to run.  For example, the following
-// code defines a family of microbenchmarks for measuring the speed
-// of memcpy() calls of different lengths:
-
-static void BM_memcpy(benchmark::State& state) {
-  char* src = new char[state.range(0)]; char* dst = new char[state.range(0)];
-  memset(src, 'x', state.range(0));
-  for (auto _ : state)
-    memcpy(dst, src, state.range(0));
-  state.SetBytesProcessed(int64_t(state.iterations()) *
-                          int64_t(state.range(0)));
-  delete[] src; delete[] dst;
-}
-BENCHMARK(BM_memcpy)->Arg(8)->Arg(64)->Arg(512)->Arg(1<<10)->Arg(8<<10);
-
-// The preceding code is quite repetitive, and can be replaced with the
-// following short-hand.  The following invocation will pick a few
-// appropriate arguments in the specified range and will generate a
-// microbenchmark for each such argument.
-BENCHMARK(BM_memcpy)->Range(8, 8<<10);
-
-// You might have a microbenchmark that depends on two inputs.  For
-// example, the following code defines a family of microbenchmarks for
-// measuring the speed of set insertion.
-static void BM_SetInsert(benchmark::State& state) {
-  set<int> data;
-  for (auto _ : state) {
-    state.PauseTiming();
-    data = ConstructRandomSet(state.range(0));
-    state.ResumeTiming();
-    for (int j = 0; j < state.range(1); ++j)
-      data.insert(RandomNumber());
-  }
-}
-BENCHMARK(BM_SetInsert)
-   ->Args({1<<10, 128})
-   ->Args({2<<10, 128})
-   ->Args({4<<10, 128})
-   ->Args({8<<10, 128})
-   ->Args({1<<10, 512})
-   ->Args({2<<10, 512})
-   ->Args({4<<10, 512})
-   ->Args({8<<10, 512});
-
-// The preceding code is quite repetitive, and can be replaced with
-// the following short-hand.  The following macro will pick a few
-// appropriate arguments in the product of the two specified ranges
-// and will generate a microbenchmark for each such pair.
-BENCHMARK(BM_SetInsert)->Ranges({{1<<10, 8<<10}, {128, 512}});
-
-// For more complex patterns of inputs, passing a custom function
-// to Apply allows programmatic specification of an
-// arbitrary set of arguments to run the microbenchmark on.
-// The following example enumerates a dense range on
-// one parameter, and a sparse range on the second.
-static void CustomArguments(benchmark::internal::Benchmark* b) {
-  for (int i = 0; i <= 10; ++i)
-    for (int j = 32; j <= 1024*1024; j *= 8)
-      b->Args({i, j});
-}
-BENCHMARK(BM_SetInsert)->Apply(CustomArguments);
-
-// Templated microbenchmarks work the same way:
-// Produce then consume 'size' messages 'iters' times
-// Measures throughput in the absence of multiprogramming.
-template <class Q> int BM_Sequential(benchmark::State& state) {
-  Q q;
-  typename Q::value_type v;
-  for (auto _ : state) {
-    for (int i = state.range(0); i--; )
-      q.push(v);
-    for (int e = state.range(0); e--; )
-      q.Wait(&v);
-  }
-  // actually messages, not bytes:
-  state.SetBytesProcessed(
-      static_cast<int64_t>(state.iterations())*state.range(0));
-}
-BENCHMARK_TEMPLATE(BM_Sequential, WaitQueue<int>)->Range(1<<0, 1<<10);
-
-Use `Benchmark::MinTime(double t)` to set the minimum time used to run the
-benchmark. This option overrides the `benchmark_min_time` flag.
-
-void BM_test(benchmark::State& state) {
- ... body ...
-}
-BENCHMARK(BM_test)->MinTime(2.0); // Run for at least 2 seconds.
-
-In a multithreaded test, it is guaranteed that none of the threads will start
-until all have reached the loop start, and all will have finished before any
-thread exits the loop body. As such, any global setup or teardown you want to
-do can be wrapped in a check against the thread index:
-
-static void BM_MultiThreaded(benchmark::State& state) {
-  if (state.thread_index == 0) {
-    // Setup code here.
-  }
-  for (auto _ : state) {
-    // Run the test as normal.
-  }
-  if (state.thread_index == 0) {
-    // Teardown code here.
-  }
-}
-BENCHMARK(BM_MultiThreaded)->Threads(4);
-
-
-If a benchmark runs a few milliseconds it may be hard to visually compare the
-measured times, since the output data is given in nanoseconds per default. In
-order to manually set the time unit, you can specify it manually:
-
-BENCHMARK(BM_test)->Unit(benchmark::kMillisecond);
-*/
-
-#ifndef BENCHMARK_BENCHMARK_H_
-#define BENCHMARK_BENCHMARK_H_
-
-// The _MSVC_LANG check should detect Visual Studio 2015 Update 3 and newer.
-#if __cplusplus >= 201103L || (defined(_MSVC_LANG) && _MSVC_LANG >= 201103L)
-#define BENCHMARK_HAS_CXX11
-#endif
-
-#include <stdint.h>
-
-#include <algorithm>
-#include <cassert>
-#include <cstddef>
-#include <iosfwd>
-#include <map>
-#include <set>
-#include <string>
-#include <vector>
-
-#if defined(BENCHMARK_HAS_CXX11)
-#include <initializer_list>
-#include <type_traits>
-#include <utility>
-#endif
-
-#if defined(_MSC_VER)
-#include <intrin.h>  // for _ReadWriteBarrier
-#endif
-
-#ifndef BENCHMARK_HAS_CXX11
-#define BENCHMARK_DISALLOW_COPY_AND_ASSIGN(TypeName) \
-  TypeName(const TypeName&);                         \
-  TypeName& operator=(const TypeName&)
-#else
-#define BENCHMARK_DISALLOW_COPY_AND_ASSIGN(TypeName) \
-  TypeName(const TypeName&) = delete;                \
-  TypeName& operator=(const TypeName&) = delete
-#endif
-
-#if defined(__GNUC__)
-#define BENCHMARK_UNUSED __attribute__((unused))
-#define BENCHMARK_ALWAYS_INLINE __attribute__((always_inline))
-#define BENCHMARK_NOEXCEPT noexcept
-#define BENCHMARK_NOEXCEPT_OP(x) noexcept(x)
-#elif defined(_MSC_VER) && !defined(__clang__)
-#define BENCHMARK_UNUSED
-#define BENCHMARK_ALWAYS_INLINE __forceinline
-#if _MSC_VER >= 1900
-#define BENCHMARK_NOEXCEPT noexcept
-#define BENCHMARK_NOEXCEPT_OP(x) noexcept(x)
-#else
-#define BENCHMARK_NOEXCEPT
-#define BENCHMARK_NOEXCEPT_OP(x)
-#endif
-#define __func__ __FUNCTION__
-#else
-#define BENCHMARK_UNUSED
-#define BENCHMARK_ALWAYS_INLINE
-#define BENCHMARK_NOEXCEPT
-#define BENCHMARK_NOEXCEPT_OP(x)
-#endif
-
-#define BENCHMARK_INTERNAL_TOSTRING2(x) #x
-#define BENCHMARK_INTERNAL_TOSTRING(x) BENCHMARK_INTERNAL_TOSTRING2(x)
-
-#if defined(__GNUC__) || defined(__clang__)
-#define BENCHMARK_BUILTIN_EXPECT(x, y) __builtin_expect(x, y)
-#define BENCHMARK_DEPRECATED_MSG(msg) __attribute__((deprecated(msg)))
-#else
-#define BENCHMARK_BUILTIN_EXPECT(x, y) x
-#define BENCHMARK_DEPRECATED_MSG(msg)
-#define BENCHMARK_WARNING_MSG(msg)                           \
-  __pragma(message(__FILE__ "(" BENCHMARK_INTERNAL_TOSTRING( \
-      __LINE__) ") : warning note: " msg))
-#endif
-
-#if defined(__GNUC__) && !defined(__clang__)
-#define BENCHMARK_GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
-#endif
-
-#ifndef __has_builtin
-#define __has_builtin(x) 0
-#endif
-
-#if defined(__GNUC__) || __has_builtin(__builtin_unreachable)
-  #define BENCHMARK_UNREACHABLE() __builtin_unreachable()
-#elif defined(_MSC_VER)
-  #define BENCHMARK_UNREACHABLE() __assume(false)
-#else
-  #define BENCHMARK_UNREACHABLE() ((void)0)
-#endif
-
-namespace benchmark {
-class BenchmarkReporter;
-class MemoryManager;
-
-void Initialize(int* argc, char** argv);
-
-// Report to stdout all arguments in 'argv' as unrecognized except the first.
-// Returns true there is at least on unrecognized argument (i.e. 'argc' > 1).
-bool ReportUnrecognizedArguments(int argc, char** argv);
-
-// Generate a list of benchmarks matching the specified --benchmark_filter flag
-// and if --benchmark_list_tests is specified return after printing the name
-// of each matching benchmark. Otherwise run each matching benchmark and
-// report the results.
-//
-// The second and third overload use the specified 'display_reporter' and
-//  'file_reporter' respectively. 'file_reporter' will write to the file
-//  specified
-//   by '--benchmark_output'. If '--benchmark_output' is not given the
-//  'file_reporter' is ignored.
-//
-// RETURNS: The number of matching benchmarks.
-size_t RunSpecifiedBenchmarks();
-size_t RunSpecifiedBenchmarks(BenchmarkReporter* display_reporter);
-size_t RunSpecifiedBenchmarks(BenchmarkReporter* display_reporter,
-                              BenchmarkReporter* file_reporter);
-
-// Register a MemoryManager instance that will be used to collect and report
-// allocation measurements for benchmark runs.
-void RegisterMemoryManager(MemoryManager* memory_manager);
-
-namespace internal {
-class Benchmark;
-class BenchmarkImp;
-class BenchmarkFamilies;
-
-void UseCharPointer(char const volatile*);
-
-// Take ownership of the pointer and register the benchmark. Return the
-// registered benchmark.
-Benchmark* RegisterBenchmarkInternal(Benchmark*);
-
-// Ensure that the standard streams are properly initialized in every TU.
-int InitializeStreams();
-BENCHMARK_UNUSED static int stream_init_anchor = InitializeStreams();
-
-}  // namespace internal
-
-#if (!defined(__GNUC__) && !defined(__clang__)) || defined(__pnacl__) || \
-    defined(__EMSCRIPTEN__)
-#define BENCHMARK_HAS_NO_INLINE_ASSEMBLY
-#endif
-
-// The DoNotOptimize(...) function can be used to prevent a value or
-// expression from being optimized away by the compiler. This function is
-// intended to add little to no overhead.
-// See: https://youtu.be/nXaxk27zwlk?t=2441
-#ifndef BENCHMARK_HAS_NO_INLINE_ASSEMBLY
-template <class Tp>
-inline BENCHMARK_ALWAYS_INLINE void DoNotOptimize(Tp const& value) {
-  asm volatile("" : : "r,m"(value) : "memory");
-}
-
-template <class Tp>
-inline BENCHMARK_ALWAYS_INLINE void DoNotOptimize(Tp& value) {
-#if defined(__clang__)
-  asm volatile("" : "+r,m"(value) : : "memory");
-#else
-  asm volatile("" : "+m,r"(value) : : "memory");
-#endif
-}
-
-// Force the compiler to flush pending writes to global memory. Acts as an
-// effective read/write barrier
-inline BENCHMARK_ALWAYS_INLINE void ClobberMemory() {
-  asm volatile("" : : : "memory");
-}
-#elif defined(_MSC_VER)
-template <class Tp>
-inline BENCHMARK_ALWAYS_INLINE void DoNotOptimize(Tp const& value) {
-  internal::UseCharPointer(&reinterpret_cast<char const volatile&>(value));
-  _ReadWriteBarrier();
-}
-
-inline BENCHMARK_ALWAYS_INLINE void ClobberMemory() { _ReadWriteBarrier(); }
-#else
-template <class Tp>
-inline BENCHMARK_ALWAYS_INLINE void DoNotOptimize(Tp const& value) {
-  internal::UseCharPointer(&reinterpret_cast<char const volatile&>(value));
-}
-// FIXME Add ClobberMemory() for non-gnu and non-msvc compilers
-#endif
-
-// This class is used for user-defined counters.
-class Counter {
- public:
-  enum Flags {
-    kDefaults = 0,
-    // Mark the counter as a rate. It will be presented divided
-    // by the duration of the benchmark.
-    kIsRate = 1U << 0U,
-    // Mark the counter as a thread-average quantity. It will be
-    // presented divided by the number of threads.
-    kAvgThreads = 1U << 1U,
-    // Mark the counter as a thread-average rate. See above.
-    kAvgThreadsRate = kIsRate | kAvgThreads,
-    // Mark the counter as a constant value, valid/same for *every* iteration.
-    // When reporting, it will be *multiplied* by the iteration count.
-    kIsIterationInvariant = 1U << 2U,
-    // Mark the counter as a constant rate.
-    // When reporting, it will be *multiplied* by the iteration count
-    // and then divided by the duration of the benchmark.
-    kIsIterationInvariantRate = kIsRate | kIsIterationInvariant,
-    // Mark the counter as a iteration-average quantity.
-    // It will be presented divided by the number of iterations.
-    kAvgIterations = 1U << 3U,
-    // Mark the counter as a iteration-average rate. See above.
-    kAvgIterationsRate = kIsRate | kAvgIterations
-  };
-
-  enum OneK {
-    // 1'000 items per 1k
-    kIs1000 = 1000,
-    // 1'024 items per 1k
-    kIs1024 = 1024
-  };
-
-  double value;
-  Flags flags;
-  OneK oneK;
-
-  BENCHMARK_ALWAYS_INLINE
-  Counter(double v = 0., Flags f = kDefaults, OneK k = kIs1000)
-      : value(v), flags(f), oneK(k) {}
-
-  BENCHMARK_ALWAYS_INLINE operator double const&() const { return value; }
-  BENCHMARK_ALWAYS_INLINE operator double&() { return value; }
-};
-
-// A helper for user code to create unforeseen combinations of Flags, without
-// having to do this cast manually each time, or providing this operator.
-Counter::Flags inline operator|(const Counter::Flags& LHS,
-                                const Counter::Flags& RHS) {
-  return static_cast<Counter::Flags>(static_cast<int>(LHS) |
-                                     static_cast<int>(RHS));
-}
-
-// This is the container for the user-defined counters.
-typedef std::map<std::string, Counter> UserCounters;
-
-// TimeUnit is passed to a benchmark in order to specify the order of magnitude
-// for the measured time.
-enum TimeUnit { kNanosecond, kMicrosecond, kMillisecond };
-
-// BigO is passed to a benchmark in order to specify the asymptotic
-// computational
-// complexity for the benchmark. In case oAuto is selected, complexity will be
-// calculated automatically to the best fit.
-enum BigO { oNone, o1, oN, oNSquared, oNCubed, oLogN, oNLogN, oAuto, oLambda };
-
-// BigOFunc is passed to a benchmark in order to specify the asymptotic
-// computational complexity for the benchmark.
-typedef double(BigOFunc)(int64_t);
-
-// StatisticsFunc is passed to a benchmark in order to compute some descriptive
-// statistics over all the measurements of some type
-typedef double(StatisticsFunc)(const std::vector<double>&);
-
-struct Statistics {
-  std::string name_;
-  StatisticsFunc* compute_;
-
-  Statistics(const std::string& name, StatisticsFunc* compute)
-      : name_(name), compute_(compute) {}
-};
-
-namespace internal {
-struct BenchmarkInstance;
-class ThreadTimer;
-class ThreadManager;
-
-enum AggregationReportMode
-#if defined(BENCHMARK_HAS_CXX11)
-    : unsigned
-#else
-#endif
-{
-  // The mode has not been manually specified
-  ARM_Unspecified = 0,
-  // The mode is user-specified.
-  // This may or may not be set when the following bit-flags are set.
-  ARM_Default = 1U << 0U,
-  // File reporter should only output aggregates.
-  ARM_FileReportAggregatesOnly = 1U << 1U,
-  // Display reporter should only output aggregates
-  ARM_DisplayReportAggregatesOnly = 1U << 2U,
-  // Both reporters should only display aggregates.
-  ARM_ReportAggregatesOnly =
-      ARM_FileReportAggregatesOnly | ARM_DisplayReportAggregatesOnly
-};
-
-}  // namespace internal
-
-// State is passed to a running Benchmark and contains state for the
-// benchmark to use.
-class State {
- public:
-  struct StateIterator;
-  friend struct StateIterator;
-
-  // Returns iterators used to run each iteration of a benchmark using a
-  // C++11 ranged-based for loop. These functions should not be called directly.
-  //
-  // REQUIRES: The benchmark has not started running yet. Neither begin nor end
-  // have been called previously.
-  //
-  // NOTE: KeepRunning may not be used after calling either of these functions.
-  BENCHMARK_ALWAYS_INLINE StateIterator begin();
-  BENCHMARK_ALWAYS_INLINE StateIterator end();
-
-  // Returns true if the benchmark should continue through another iteration.
-  // NOTE: A benchmark may not return from the test until KeepRunning() has
-  // returned false.
-  bool KeepRunning();
-
-  // Returns true iff the benchmark should run n more iterations.
-  // REQUIRES: 'n' > 0.
-  // NOTE: A benchmark must not return from the test until KeepRunningBatch()
-  // has returned false.
-  // NOTE: KeepRunningBatch() may overshoot by up to 'n' iterations.
-  //
-  // Intended usage:
-  //   while (state.KeepRunningBatch(1000)) {
-  //     // process 1000 elements
-  //   }
-  bool KeepRunningBatch(size_t n);
-
-  // REQUIRES: timer is running and 'SkipWithError(...)' has not been called
-  //           by the current thread.
-  // Stop the benchmark timer.  If not called, the timer will be
-  // automatically stopped after the last iteration of the benchmark loop.
-  //
-  // For threaded benchmarks the PauseTiming() function only pauses the timing
-  // for the current thread.
-  //
-  // NOTE: The "real time" measurement is per-thread. If different threads
-  // report different measurements the largest one is reported.
-  //
-  // NOTE: PauseTiming()/ResumeTiming() are relatively
-  // heavyweight, and so their use should generally be avoided
-  // within each benchmark iteration, if possible.
-  void PauseTiming();
-
-  // REQUIRES: timer is not running and 'SkipWithError(...)' has not been called
-  //           by the current thread.
-  // Start the benchmark timer.  The timer is NOT running on entrance to the
-  // benchmark function. It begins running after control flow enters the
-  // benchmark loop.
-  //
-  // NOTE: PauseTiming()/ResumeTiming() are relatively
-  // heavyweight, and so their use should generally be avoided
-  // within each benchmark iteration, if possible.
-  void ResumeTiming();
-
-  // REQUIRES: 'SkipWithError(...)' has not been called previously by the
-  //            current thread.
-  // Report the benchmark as resulting in an error with the specified 'msg'.
-  // After this call the user may explicitly 'return' from the benchmark.
-  //
-  // If the ranged-for style of benchmark loop is used, the user must explicitly
-  // break from the loop, otherwise all future iterations will be run.
-  // If the 'KeepRunning()' loop is used the current thread will automatically
-  // exit the loop at the end of the current iteration.
-  //
-  // For threaded benchmarks only the current thread stops executing and future
-  // calls to `KeepRunning()` will block until all threads have completed
-  // the `KeepRunning()` loop. If multiple threads report an error only the
-  // first error message is used.
-  //
-  // NOTE: Calling 'SkipWithError(...)' does not cause the benchmark to exit
-  // the current scope immediately. If the function is called from within
-  // the 'KeepRunning()' loop the current iteration will finish. It is the users
-  // responsibility to exit the scope as needed.
-  void SkipWithError(const char* msg);
-
-  // REQUIRES: called exactly once per iteration of the benchmarking loop.
-  // Set the manually measured time for this benchmark iteration, which
-  // is used instead of automatically measured time if UseManualTime() was
-  // specified.
-  //
-  // For threaded benchmarks the final value will be set to the largest
-  // reported values.
-  void SetIterationTime(double seconds);
-
-  // Set the number of bytes processed by the current benchmark
-  // execution.  This routine is typically called once at the end of a
-  // throughput oriented benchmark.
-  //
-  // REQUIRES: a benchmark has exited its benchmarking loop.
-  BENCHMARK_ALWAYS_INLINE
-  void SetBytesProcessed(int64_t bytes) {
-    counters["bytes_per_second"] =
-        Counter(static_cast<double>(bytes), Counter::kIsRate, Counter::kIs1024);
-  }
-
-  BENCHMARK_ALWAYS_INLINE
-  int64_t bytes_processed() const {
-    if (counters.find("bytes_per_second") != counters.end())
-      return static_cast<int64_t>(counters.at("bytes_per_second"));
-    return 0;
-  }
-
-  // If this routine is called with complexity_n > 0 and complexity report is
-  // requested for the
-  // family benchmark, then current benchmark will be part of the computation
-  // and complexity_n will
-  // represent the length of N.
-  BENCHMARK_ALWAYS_INLINE
-  void SetComplexityN(int64_t complexity_n) { complexity_n_ = complexity_n; }
-
-  BENCHMARK_ALWAYS_INLINE
-  int64_t complexity_length_n() { return complexity_n_; }
-
-  // If this routine is called with items > 0, then an items/s
-  // label is printed on the benchmark report line for the currently
-  // executing benchmark. It is typically called at the end of a processing
-  // benchmark where a processing items/second output is desired.
-  //
-  // REQUIRES: a benchmark has exited its benchmarking loop.
-  BENCHMARK_ALWAYS_INLINE
-  void SetItemsProcessed(int64_t items) {
-    counters["items_per_second"] =
-        Counter(static_cast<double>(items), benchmark::Counter::kIsRate);
-  }
-
-  BENCHMARK_ALWAYS_INLINE
-  int64_t items_processed() const {
-    if (counters.find("items_per_second") != counters.end())
-      return static_cast<int64_t>(counters.at("items_per_second"));
-    return 0;
-  }
-
-  // If this routine is called, the specified label is printed at the
-  // end of the benchmark report line for the currently executing
-  // benchmark.  Example:
-  //  static void BM_Compress(benchmark::State& state) {
-  //    ...
-  //    double compress = input_size / output_size;
-  //    state.SetLabel(StrFormat("compress:%.1f%%", 100.0*compression));
-  //  }
-  // Produces output that looks like:
-  //  BM_Compress   50         50   14115038  compress:27.3%
-  //
-  // REQUIRES: a benchmark has exited its benchmarking loop.
-  void SetLabel(const char* label);
-
-  void BENCHMARK_ALWAYS_INLINE SetLabel(const std::string& str) {
-    this->SetLabel(str.c_str());
-  }
-
-  // Range arguments for this run. CHECKs if the argument has been set.
-  BENCHMARK_ALWAYS_INLINE
-  int64_t range(std::size_t pos = 0) const {
-    assert(range_.size() > pos);
-    return range_[pos];
-  }
-
-  BENCHMARK_DEPRECATED_MSG("use 'range(0)' instead")
-  int64_t range_x() const { return range(0); }
-
-  BENCHMARK_DEPRECATED_MSG("use 'range(1)' instead")
-  int64_t range_y() const { return range(1); }
-
-  BENCHMARK_ALWAYS_INLINE
-  size_t iterations() const {
-    if (BENCHMARK_BUILTIN_EXPECT(!started_, false)) {
-      return 0;
-    }
-    return max_iterations - total_iterations_ + batch_leftover_;
-  }
-
- private
-     :  // items we expect on the first cache line (ie 64 bytes of the struct)
-  // When total_iterations_ is 0, KeepRunning() and friends will return false.
-  // May be larger than max_iterations.
-  size_t total_iterations_;
-
-  // When using KeepRunningBatch(), batch_leftover_ holds the number of
-  // iterations beyond max_iters that were run. Used to track
-  // completed_iterations_ accurately.
-  size_t batch_leftover_;
-
- public:
-  const size_t max_iterations;
-
- private:
-  bool started_;
-  bool finished_;
-  bool error_occurred_;
-
- private:  // items we don't need on the first cache line
-  std::vector<int64_t> range_;
-
-  int64_t complexity_n_;
-
- public:
-  // Container for user-defined counters.
-  UserCounters counters;
-  // Index of the executing thread. Values from [0, threads).
-  const int thread_index;
-  // Number of threads concurrently executing the benchmark.
-  const int threads;
-
- private:
-  State(size_t max_iters, const std::vector<int64_t>& ranges, int thread_i,
-        int n_threads, internal::ThreadTimer* timer,
-        internal::ThreadManager* manager);
-
-  void StartKeepRunning();
-  // Implementation of KeepRunning() and KeepRunningBatch().
-  // is_batch must be true unless n is 1.
-  bool KeepRunningInternal(size_t n, bool is_batch);
-  void FinishKeepRunning();
-  internal::ThreadTimer* timer_;
-  internal::ThreadManager* manager_;
-
-  friend struct internal::BenchmarkInstance;
-};
-
-inline BENCHMARK_ALWAYS_INLINE bool State::KeepRunning() {
-  return KeepRunningInternal(1, /*is_batch=*/false);
-}
-
-inline BENCHMARK_ALWAYS_INLINE bool State::KeepRunningBatch(size_t n) {
-  return KeepRunningInternal(n, /*is_batch=*/true);
-}
-
-inline BENCHMARK_ALWAYS_INLINE bool State::KeepRunningInternal(size_t n,
-                                                               bool is_batch) {
-  // total_iterations_ is set to 0 by the constructor, and always set to a
-  // nonzero value by StartKepRunning().
-  assert(n > 0);
-  // n must be 1 unless is_batch is true.
-  assert(is_batch || n == 1);
-  if (BENCHMARK_BUILTIN_EXPECT(total_iterations_ >= n, true)) {
-    total_iterations_ -= n;
-    return true;
-  }
-  if (!started_) {
-    StartKeepRunning();
-    if (!error_occurred_ && total_iterations_ >= n) {
-      total_iterations_ -= n;
-      return true;
-    }
-  }
-  // For non-batch runs, total_iterations_ must be 0 by now.
-  if (is_batch && total_iterations_ != 0) {
-    batch_leftover_ = n - total_iterations_;
-    total_iterations_ = 0;
-    return true;
-  }
-  FinishKeepRunning();
-  return false;
-}
-
-struct State::StateIterator {
-  struct BENCHMARK_UNUSED Value {};
-  typedef std::forward_iterator_tag iterator_category;
-  typedef Value value_type;
-  typedef Value reference;
-  typedef Value pointer;
-  typedef std::ptrdiff_t difference_type;
-
- private:
-  friend class State;
-  BENCHMARK_ALWAYS_INLINE
-  StateIterator() : cached_(0), parent_() {}
-
-  BENCHMARK_ALWAYS_INLINE
-  explicit StateIterator(State* st)
-      : cached_(st->error_occurred_ ? 0 : st->max_iterations), parent_(st) {}
-
- public:
-  BENCHMARK_ALWAYS_INLINE
-  Value operator*() const { return Value(); }
-
-  BENCHMARK_ALWAYS_INLINE
-  StateIterator& operator++() {
-    assert(cached_ > 0);
-    --cached_;
-    return *this;
-  }
-
-  BENCHMARK_ALWAYS_INLINE
-  bool operator!=(StateIterator const&) const {
-    if (BENCHMARK_BUILTIN_EXPECT(cached_ != 0, true)) return true;
-    parent_->FinishKeepRunning();
-    return false;
-  }
-
- private:
-  size_t cached_;
-  State* const parent_;
-};
-
-inline BENCHMARK_ALWAYS_INLINE State::StateIterator State::begin() {
-  return StateIterator(this);
-}
-inline BENCHMARK_ALWAYS_INLINE State::StateIterator State::end() {
-  StartKeepRunning();
-  return StateIterator();
-}
-
-namespace internal {
-
-typedef void(Function)(State&);
-
-// ------------------------------------------------------
-// Benchmark registration object.  The BENCHMARK() macro expands
-// into an internal::Benchmark* object.  Various methods can
-// be called on this object to change the properties of the benchmark.
-// Each method returns "this" so that multiple method calls can
-// chained into one expression.
-class Benchmark {
- public:
-  virtual ~Benchmark();
-
-  // Note: the following methods all return "this" so that multiple
-  // method calls can be chained together in one expression.
-
-  // Run this benchmark once with "x" as the extra argument passed
-  // to the function.
-  // REQUIRES: The function passed to the constructor must accept an arg1.
-  Benchmark* Arg(int64_t x);
-
-  // Run this benchmark with the given time unit for the generated output report
-  Benchmark* Unit(TimeUnit unit);
-
-  // Run this benchmark once for a number of values picked from the
-  // range [start..limit].  (start and limit are always picked.)
-  // REQUIRES: The function passed to the constructor must accept an arg1.
-  Benchmark* Range(int64_t start, int64_t limit);
-
-  // Run this benchmark once for all values in the range [start..limit] with
-  // specific step
-  // REQUIRES: The function passed to the constructor must accept an arg1.
-  Benchmark* DenseRange(int64_t start, int64_t limit, int step = 1);
-
-  // Run this benchmark once with "args" as the extra arguments passed
-  // to the function.
-  // REQUIRES: The function passed to the constructor must accept arg1, arg2 ...
-  Benchmark* Args(const std::vector<int64_t>& args);
-
-  // Equivalent to Args({x, y})
-  // NOTE: This is a legacy C++03 interface provided for compatibility only.
-  //   New code should use 'Args'.
-  Benchmark* ArgPair(int64_t x, int64_t y) {
-    std::vector<int64_t> args;
-    args.push_back(x);
-    args.push_back(y);
-    return Args(args);
-  }
-
-  // Run this benchmark once for a number of values picked from the
-  // ranges [start..limit].  (starts and limits are always picked.)
-  // REQUIRES: The function passed to the constructor must accept arg1, arg2 ...
-  Benchmark* Ranges(const std::vector<std::pair<int64_t, int64_t> >& ranges);
-
-  // Equivalent to ArgNames({name})
-  Benchmark* ArgName(const std::string& name);
-
-  // Set the argument names to display in the benchmark name. If not called,
-  // only argument values will be shown.
-  Benchmark* ArgNames(const std::vector<std::string>& names);
-
-  // Equivalent to Ranges({{lo1, hi1}, {lo2, hi2}}).
-  // NOTE: This is a legacy C++03 interface provided for compatibility only.
-  //   New code should use 'Ranges'.
-  Benchmark* RangePair(int64_t lo1, int64_t hi1, int64_t lo2, int64_t hi2) {
-    std::vector<std::pair<int64_t, int64_t> > ranges;
-    ranges.push_back(std::make_pair(lo1, hi1));
-    ranges.push_back(std::make_pair(lo2, hi2));
-    return Ranges(ranges);
-  }
-
-  // Pass this benchmark object to *func, which can customize
-  // the benchmark by calling various methods like Arg, Args,
-  // Threads, etc.
-  Benchmark* Apply(void (*func)(Benchmark* benchmark));
-
-  // Set the range multiplier for non-dense range. If not called, the range
-  // multiplier kRangeMultiplier will be used.
-  Benchmark* RangeMultiplier(int multiplier);
-
-  // Set the minimum amount of time to use when running this benchmark. This
-  // option overrides the `benchmark_min_time` flag.
-  // REQUIRES: `t > 0` and `Iterations` has not been called on this benchmark.
-  Benchmark* MinTime(double t);
-
-  // Specify the amount of iterations that should be run by this benchmark.
-  // REQUIRES: 'n > 0' and `MinTime` has not been called on this benchmark.
-  //
-  // NOTE: This function should only be used when *exact* iteration control is
-  //   needed and never to control or limit how long a benchmark runs, where
-  // `--benchmark_min_time=N` or `MinTime(...)` should be used instead.
-  Benchmark* Iterations(size_t n);
-
-  // Specify the amount of times to repeat this benchmark. This option overrides
-  // the `benchmark_repetitions` flag.
-  // REQUIRES: `n > 0`
-  Benchmark* Repetitions(int n);
-
-  // Specify if each repetition of the benchmark should be reported separately
-  // or if only the final statistics should be reported. If the benchmark
-  // is not repeated then the single result is always reported.
-  // Applies to *ALL* reporters (display and file).
-  Benchmark* ReportAggregatesOnly(bool value = true);
-
-  // Same as ReportAggregatesOnly(), but applies to display reporter only.
-  Benchmark* DisplayAggregatesOnly(bool value = true);
-
-  // If a particular benchmark is I/O bound, runs multiple threads internally or
-  // if for some reason CPU timings are not representative, call this method. If
-  // called, the elapsed time will be used to control how many iterations are
-  // run, and in the printing of items/second or MB/seconds values.  If not
-  // called, the cpu time used by the benchmark will be used.
-  Benchmark* UseRealTime();
-
-  // If a benchmark must measure time manually (e.g. if GPU execution time is
-  // being
-  // measured), call this method. If called, each benchmark iteration should
-  // call
-  // SetIterationTime(seconds) to report the measured time, which will be used
-  // to control how many iterations are run, and in the printing of items/second
-  // or MB/second values.
-  Benchmark* UseManualTime();
-
-  // Set the asymptotic computational complexity for the benchmark. If called
-  // the asymptotic computational complexity will be shown on the output.
-  Benchmark* Complexity(BigO complexity = benchmark::oAuto);
-
-  // Set the asymptotic computational complexity for the benchmark. If called
-  // the asymptotic computational complexity will be shown on the output.
-  Benchmark* Complexity(BigOFunc* complexity);
-
-  // Add this statistics to be computed over all the values of benchmark run
-  Benchmark* ComputeStatistics(std::string name, StatisticsFunc* statistics);
-
-  // Support for running multiple copies of the same benchmark concurrently
-  // in multiple threads.  This may be useful when measuring the scaling
-  // of some piece of code.
-
-  // Run one instance of this benchmark concurrently in t threads.
-  Benchmark* Threads(int t);
-
-  // Pick a set of values T from [min_threads,max_threads].
-  // min_threads and max_threads are always included in T.  Run this
-  // benchmark once for each value in T.  The benchmark run for a
-  // particular value t consists of t threads running the benchmark
-  // function concurrently.  For example, consider:
-  //    BENCHMARK(Foo)->ThreadRange(1,16);
-  // This will run the following benchmarks:
-  //    Foo in 1 thread
-  //    Foo in 2 threads
-  //    Foo in 4 threads
-  //    Foo in 8 threads
-  //    Foo in 16 threads
-  Benchmark* ThreadRange(int min_threads, int max_threads);
-
-  // For each value n in the range, run this benchmark once using n threads.
-  // min_threads and max_threads are always included in the range.
-  // stride specifies the increment. E.g. DenseThreadRange(1, 8, 3) starts
-  // a benchmark with 1, 4, 7 and 8 threads.
-  Benchmark* DenseThreadRange(int min_threads, int max_threads, int stride = 1);
-
-  // Equivalent to ThreadRange(NumCPUs(), NumCPUs())
-  Benchmark* ThreadPerCpu();
-
-  virtual void Run(State& state) = 0;
-
- protected:
-  explicit Benchmark(const char* name);
-  Benchmark(Benchmark const&);
-  void SetName(const char* name);
-
-  int ArgsCnt() const;
-
- private:
-  friend class BenchmarkFamilies;
-
-  std::string name_;
-  AggregationReportMode aggregation_report_mode_;
-  std::vector<std::string> arg_names_;       // Args for all benchmark runs
-  std::vector<std::vector<int64_t> > args_;  // Args for all benchmark runs
-  TimeUnit time_unit_;
-  int range_multiplier_;
-  double min_time_;
-  size_t iterations_;
-  int repetitions_;
-  bool use_real_time_;
-  bool use_manual_time_;
-  BigO complexity_;
-  BigOFunc* complexity_lambda_;
-  std::vector<Statistics> statistics_;
-  std::vector<int> thread_counts_;
-
-  Benchmark& operator=(Benchmark const&);
-};
-
-}  // namespace internal
-
-// Create and register a benchmark with the specified 'name' that invokes
-// the specified functor 'fn'.
-//
-// RETURNS: A pointer to the registered benchmark.
-internal::Benchmark* RegisterBenchmark(const char* name,
-                                       internal::Function* fn);
-
-#if defined(BENCHMARK_HAS_CXX11)
-template <class Lambda>
-internal::Benchmark* RegisterBenchmark(const char* name, Lambda&& fn);
-#endif
-
-// Remove all registered benchmarks. All pointers to previously registered
-// benchmarks are invalidated.
-void ClearRegisteredBenchmarks();
-
-namespace internal {
-// The class used to hold all Benchmarks created from static function.
-// (ie those created using the BENCHMARK(...) macros.
-class FunctionBenchmark : public Benchmark {
- public:
-  FunctionBenchmark(const char* name, Function* func)
-      : Benchmark(name), func_(func) {}
-
-  virtual void Run(State& st);
-
- private:
-  Function* func_;
-};
-
-#ifdef BENCHMARK_HAS_CXX11
-template <class Lambda>
-class LambdaBenchmark : public Benchmark {
- public:
-  virtual void Run(State& st) { lambda_(st); }
-
- private:
-  template <class OLambda>
-  LambdaBenchmark(const char* name, OLambda&& lam)
-      : Benchmark(name), lambda_(std::forward<OLambda>(lam)) {}
-
-  LambdaBenchmark(LambdaBenchmark const&) = delete;
-
- private:
-  template <class Lam>
-  friend Benchmark* ::benchmark::RegisterBenchmark(const char*, Lam&&);
-
-  Lambda lambda_;
-};
-#endif
-
-}  // namespace internal
-
-inline internal::Benchmark* RegisterBenchmark(const char* name,
-                                              internal::Function* fn) {
-  return internal::RegisterBenchmarkInternal(
-      ::new internal::FunctionBenchmark(name, fn));
-}
-
-#ifdef BENCHMARK_HAS_CXX11
-template <class Lambda>
-internal::Benchmark* RegisterBenchmark(const char* name, Lambda&& fn) {
-  using BenchType =
-      internal::LambdaBenchmark<typename std::decay<Lambda>::type>;
-  return internal::RegisterBenchmarkInternal(
-      ::new BenchType(name, std::forward<Lambda>(fn)));
-}
-#endif
-
-#if defined(BENCHMARK_HAS_CXX11) && \
-    (!defined(BENCHMARK_GCC_VERSION) || BENCHMARK_GCC_VERSION >= 409)
-template <class Lambda, class... Args>
-internal::Benchmark* RegisterBenchmark(const char* name, Lambda&& fn,
-                                       Args&&... args) {
-  return benchmark::RegisterBenchmark(
-      name, [=](benchmark::State& st) { fn(st, args...); });
-}
-#else
-#define BENCHMARK_HAS_NO_VARIADIC_REGISTER_BENCHMARK
-#endif
-
-// The base class for all fixture tests.
-class Fixture : public internal::Benchmark {
- public:
-  Fixture() : internal::Benchmark("") {}
-
-  virtual void Run(State& st) {
-    this->SetUp(st);
-    this->BenchmarkCase(st);
-    this->TearDown(st);
-  }
-
-  // These will be deprecated ...
-  virtual void SetUp(const State&) {}
-  virtual void TearDown(const State&) {}
-  // ... In favor of these.
-  virtual void SetUp(State& st) { SetUp(const_cast<const State&>(st)); }
-  virtual void TearDown(State& st) { TearDown(const_cast<const State&>(st)); }
-
- protected:
-  virtual void BenchmarkCase(State&) = 0;
-};
-
-}  // namespace benchmark
-
-// ------------------------------------------------------
-// Macro to register benchmarks
-
-// Check that __COUNTER__ is defined and that __COUNTER__ increases by 1
-// every time it is expanded. X + 1 == X + 0 is used in case X is defined to be
-// empty. If X is empty the expression becomes (+1 == +0).
-#if defined(__COUNTER__) && (__COUNTER__ + 1 == __COUNTER__ + 0)
-#define BENCHMARK_PRIVATE_UNIQUE_ID __COUNTER__
-#else
-#define BENCHMARK_PRIVATE_UNIQUE_ID __LINE__
-#endif
-
-// Helpers for generating unique variable names
-#define BENCHMARK_PRIVATE_NAME(n) \
-  BENCHMARK_PRIVATE_CONCAT(_benchmark_, BENCHMARK_PRIVATE_UNIQUE_ID, n)
-#define BENCHMARK_PRIVATE_CONCAT(a, b, c) BENCHMARK_PRIVATE_CONCAT2(a, b, c)
-#define BENCHMARK_PRIVATE_CONCAT2(a, b, c) a##b##c
-
-#define BENCHMARK_PRIVATE_DECLARE(n)                                 \
-  static ::benchmark::internal::Benchmark* BENCHMARK_PRIVATE_NAME(n) \
-      BENCHMARK_UNUSED
-
-#define BENCHMARK(n)                                     \
-  BENCHMARK_PRIVATE_DECLARE(n) =                         \
-      (::benchmark::internal::RegisterBenchmarkInternal( \
-          new ::benchmark::internal::FunctionBenchmark(#n, n)))
-
-// Old-style macros
-#define BENCHMARK_WITH_ARG(n, a) BENCHMARK(n)->Arg((a))
-#define BENCHMARK_WITH_ARG2(n, a1, a2) BENCHMARK(n)->Args({(a1), (a2)})
-#define BENCHMARK_WITH_UNIT(n, t) BENCHMARK(n)->Unit((t))
-#define BENCHMARK_RANGE(n, lo, hi) BENCHMARK(n)->Range((lo), (hi))
-#define BENCHMARK_RANGE2(n, l1, h1, l2, h2) \
-  BENCHMARK(n)->RangePair({{(l1), (h1)}, {(l2), (h2)}})
-
-#ifdef BENCHMARK_HAS_CXX11
-
-// Register a benchmark which invokes the function specified by `func`
-// with the additional arguments specified by `...`.
-//
-// For example:
-//
-// template <class ...ExtraArgs>`
-// void BM_takes_args(benchmark::State& state, ExtraArgs&&... extra_args) {
-//  [...]
-//}
-// /* Registers a benchmark named "BM_takes_args/int_string_test` */
-// BENCHMARK_CAPTURE(BM_takes_args, int_string_test, 42, std::string("abc"));
-#define BENCHMARK_CAPTURE(func, test_case_name, ...)     \
-  BENCHMARK_PRIVATE_DECLARE(func) =                      \
-      (::benchmark::internal::RegisterBenchmarkInternal( \
-          new ::benchmark::internal::FunctionBenchmark(  \
-              #func "/" #test_case_name,                 \
-              [](::benchmark::State& st) { func(st, __VA_ARGS__); })))
-
-#endif  // BENCHMARK_HAS_CXX11
-
-// This will register a benchmark for a templatized function.  For example:
-//
-// template<int arg>
-// void BM_Foo(int iters);
-//
-// BENCHMARK_TEMPLATE(BM_Foo, 1);
-//
-// will register BM_Foo<1> as a benchmark.
-#define BENCHMARK_TEMPLATE1(n, a)                        \
-  BENCHMARK_PRIVATE_DECLARE(n) =                         \
-      (::benchmark::internal::RegisterBenchmarkInternal( \
-          new ::benchmark::internal::FunctionBenchmark(#n "<" #a ">", n<a>)))
-
-#define BENCHMARK_TEMPLATE2(n, a, b)                                         \
-  BENCHMARK_PRIVATE_DECLARE(n) =                                             \
-      (::benchmark::internal::RegisterBenchmarkInternal(                     \
-          new ::benchmark::internal::FunctionBenchmark(#n "<" #a "," #b ">", \
-                                                       n<a, b>)))
-
-#ifdef BENCHMARK_HAS_CXX11
-#define BENCHMARK_TEMPLATE(n, ...)                       \
-  BENCHMARK_PRIVATE_DECLARE(n) =                         \
-      (::benchmark::internal::RegisterBenchmarkInternal( \
-          new ::benchmark::internal::FunctionBenchmark(  \
-              #n "<" #__VA_ARGS__ ">", n<__VA_ARGS__>)))
-#else
-#define BENCHMARK_TEMPLATE(n, a) BENCHMARK_TEMPLATE1(n, a)
-#endif
-
-#define BENCHMARK_PRIVATE_DECLARE_F(BaseClass, Method)        \
-  class BaseClass##_##Method##_Benchmark : public BaseClass { \
-   public:                                                    \
-    BaseClass##_##Method##_Benchmark() : BaseClass() {        \
-      this->SetName(#BaseClass "/" #Method);                  \
-    }                                                         \
-                                                              \
-   protected:                                                 \
-    virtual void BenchmarkCase(::benchmark::State&);          \
-  };
-
-#define BENCHMARK_TEMPLATE1_PRIVATE_DECLARE_F(BaseClass, Method, a) \
-  class BaseClass##_##Method##_Benchmark : public BaseClass<a> {    \
-   public:                                                          \
-    BaseClass##_##Method##_Benchmark() : BaseClass<a>() {           \
-      this->SetName(#BaseClass "<" #a ">/" #Method);                \
-    }                                                               \
-                                                                    \
-   protected:                                                       \
-    virtual void BenchmarkCase(::benchmark::State&);                \
-  };
-
-#define BENCHMARK_TEMPLATE2_PRIVATE_DECLARE_F(BaseClass, Method, a, b) \
-  class BaseClass##_##Method##_Benchmark : public BaseClass<a, b> {    \
-   public:                                                             \
-    BaseClass##_##Method##_Benchmark() : BaseClass<a, b>() {           \
-      this->SetName(#BaseClass "<" #a "," #b ">/" #Method);            \
-    }                                                                  \
-                                                                       \
-   protected:                                                          \
-    virtual void BenchmarkCase(::benchmark::State&);                   \
-  };
-
-#ifdef BENCHMARK_HAS_CXX11
-#define BENCHMARK_TEMPLATE_PRIVATE_DECLARE_F(BaseClass, Method, ...)       \
-  class BaseClass##_##Method##_Benchmark : public BaseClass<__VA_ARGS__> { \
-   public:                                                                 \
-    BaseClass##_##Method##_Benchmark() : BaseClass<__VA_ARGS__>() {        \
-      this->SetName(#BaseClass "<" #__VA_ARGS__ ">/" #Method);             \
-    }                                                                      \
-                                                                           \
-   protected:                                                              \
-    virtual void BenchmarkCase(::benchmark::State&);                       \
-  };
-#else
-#define BENCHMARK_TEMPLATE_PRIVATE_DECLARE_F(n, a) \
-  BENCHMARK_TEMPLATE1_PRIVATE_DECLARE_F(n, a)
-#endif
-
-#define BENCHMARK_DEFINE_F(BaseClass, Method)    \
-  BENCHMARK_PRIVATE_DECLARE_F(BaseClass, Method) \
-  void BaseClass##_##Method##_Benchmark::BenchmarkCase
-
-#define BENCHMARK_TEMPLATE1_DEFINE_F(BaseClass, Method, a)    \
-  BENCHMARK_TEMPLATE1_PRIVATE_DECLARE_F(BaseClass, Method, a) \
-  void BaseClass##_##Method##_Benchmark::BenchmarkCase
-
-#define BENCHMARK_TEMPLATE2_DEFINE_F(BaseClass, Method, a, b)    \
-  BENCHMARK_TEMPLATE2_PRIVATE_DECLARE_F(BaseClass, Method, a, b) \
-  void BaseClass##_##Method##_Benchmark::BenchmarkCase
-
-#ifdef BENCHMARK_HAS_CXX11
-#define BENCHMARK_TEMPLATE_DEFINE_F(BaseClass, Method, ...)            \
-  BENCHMARK_TEMPLATE_PRIVATE_DECLARE_F(BaseClass, Method, __VA_ARGS__) \
-  void BaseClass##_##Method##_Benchmark::BenchmarkCase
-#else
-#define BENCHMARK_TEMPLATE_DEFINE_F(BaseClass, Method, a) \
-  BENCHMARK_TEMPLATE1_DEFINE_F(BaseClass, Method, a)
-#endif
-
-#define BENCHMARK_REGISTER_F(BaseClass, Method) \
-  BENCHMARK_PRIVATE_REGISTER_F(BaseClass##_##Method##_Benchmark)
-
-#define BENCHMARK_PRIVATE_REGISTER_F(TestName) \
-  BENCHMARK_PRIVATE_DECLARE(TestName) =        \
-      (::benchmark::internal::RegisterBenchmarkInternal(new TestName()))
-
-// This macro will define and register a benchmark within a fixture class.
-#define BENCHMARK_F(BaseClass, Method)           \
-  BENCHMARK_PRIVATE_DECLARE_F(BaseClass, Method) \
-  BENCHMARK_REGISTER_F(BaseClass, Method);       \
-  void BaseClass##_##Method##_Benchmark::BenchmarkCase
-
-#define BENCHMARK_TEMPLATE1_F(BaseClass, Method, a)           \
-  BENCHMARK_TEMPLATE1_PRIVATE_DECLARE_F(BaseClass, Method, a) \
-  BENCHMARK_REGISTER_F(BaseClass, Method);                    \
-  void BaseClass##_##Method##_Benchmark::BenchmarkCase
-
-#define BENCHMARK_TEMPLATE2_F(BaseClass, Method, a, b)           \
-  BENCHMARK_TEMPLATE2_PRIVATE_DECLARE_F(BaseClass, Method, a, b) \
-  BENCHMARK_REGISTER_F(BaseClass, Method);                       \
-  void BaseClass##_##Method##_Benchmark::BenchmarkCase
-
-#ifdef BENCHMARK_HAS_CXX11
-#define BENCHMARK_TEMPLATE_F(BaseClass, Method, ...)                   \
-  BENCHMARK_TEMPLATE_PRIVATE_DECLARE_F(BaseClass, Method, __VA_ARGS__) \
-  BENCHMARK_REGISTER_F(BaseClass, Method);                             \
-  void BaseClass##_##Method##_Benchmark::BenchmarkCase
-#else
-#define BENCHMARK_TEMPLATE_F(BaseClass, Method, a) \
-  BENCHMARK_TEMPLATE1_F(BaseClass, Method, a)
-#endif
-
-// Helper macro to create a main routine in a test that runs the benchmarks
-#define BENCHMARK_MAIN()                                                \
-  int main(int argc, char** argv) {                                     \
-    ::benchmark::Initialize(&argc, argv);                               \
-    if (::benchmark::ReportUnrecognizedArguments(argc, argv)) return 1; \
-    ::benchmark::RunSpecifiedBenchmarks();                              \
-  }                                                                     \
-  int main(int, char**)
-
-// ------------------------------------------------------
-// Benchmark Reporters
-
-namespace benchmark {
-
-struct CPUInfo {
-  struct CacheInfo {
-    std::string type;
-    int level;
-    int size;
-    int num_sharing;
-  };
-
-  int num_cpus;
-  double cycles_per_second;
-  std::vector<CacheInfo> caches;
-  bool scaling_enabled;
-  std::vector<double> load_avg;
-
-  static const CPUInfo& Get();
-
- private:
-  CPUInfo();
-  BENCHMARK_DISALLOW_COPY_AND_ASSIGN(CPUInfo);
-};
-
-//Adding Struct for System Information
-struct SystemInfo {
-  std::string name;
-  static const SystemInfo& Get();
- private:
-  SystemInfo();
-  BENCHMARK_DISALLOW_COPY_AND_ASSIGN(SystemInfo);
-};
-
-// Interface for custom benchmark result printers.
-// By default, benchmark reports are printed to stdout. However an application
-// can control the destination of the reports by calling
-// RunSpecifiedBenchmarks and passing it a custom reporter object.
-// The reporter object must implement the following interface.
-class BenchmarkReporter {
- public:
-  struct Context {
-    CPUInfo const& cpu_info;
-    SystemInfo const& sys_info;
-    // The number of chars in the longest benchmark name.
-    size_t name_field_width;
-    static const char* executable_name;
-    Context();
-  };
-
-  struct Run {
-    enum RunType { RT_Iteration, RT_Aggregate };
-
-    Run()
-        : run_type(RT_Iteration),
-          error_occurred(false),
-          iterations(1),
-          time_unit(kNanosecond),
-          real_accumulated_time(0),
-          cpu_accumulated_time(0),
-          max_heapbytes_used(0),
-          complexity(oNone),
-          complexity_lambda(),
-          complexity_n(0),
-          report_big_o(false),
-          report_rms(false),
-          counters(),
-          has_memory_result(false),
-          allocs_per_iter(0.0),
-          max_bytes_used(0) {}
-
-    std::string benchmark_name() const;
-    std::string run_name;
-    RunType run_type;          // is this a measurement, or an aggregate?
-    std::string aggregate_name;
-    std::string report_label;  // Empty if not set by benchmark.
-    bool error_occurred;
-    std::string error_message;
-
-    int64_t iterations;
-    TimeUnit time_unit;
-    double real_accumulated_time;
-    double cpu_accumulated_time;
-
-    // Return a value representing the real time per iteration in the unit
-    // specified by 'time_unit'.
-    // NOTE: If 'iterations' is zero the returned value represents the
-    // accumulated time.
-    double GetAdjustedRealTime() const;
-
-    // Return a value representing the cpu time per iteration in the unit
-    // specified by 'time_unit'.
-    // NOTE: If 'iterations' is zero the returned value represents the
-    // accumulated time.
-    double GetAdjustedCPUTime() const;
-
-    // This is set to 0.0 if memory tracing is not enabled.
-    double max_heapbytes_used;
-
-    // Keep track of arguments to compute asymptotic complexity
-    BigO complexity;
-    BigOFunc* complexity_lambda;
-    int64_t complexity_n;
-
-    // what statistics to compute from the measurements
-    const std::vector<Statistics>* statistics;
-
-    // Inform print function whether the current run is a complexity report
-    bool report_big_o;
-    bool report_rms;
-
-    UserCounters counters;
-
-    // Memory metrics.
-    bool has_memory_result;
-    double allocs_per_iter;
-    int64_t max_bytes_used;
-  };
-
-  // Construct a BenchmarkReporter with the output stream set to 'std::cout'
-  // and the error stream set to 'std::cerr'
-  BenchmarkReporter();
-
-  // Called once for every suite of benchmarks run.
-  // The parameter "context" contains information that the
-  // reporter may wish to use when generating its report, for example the
-  // platform under which the benchmarks are running. The benchmark run is
-  // never started if this function returns false, allowing the reporter
-  // to skip runs based on the context information.
-  virtual bool ReportContext(const Context& context) = 0;
-
-  // Called once for each group of benchmark runs, gives information about
-  // cpu-time and heap memory usage during the benchmark run. If the group
-  // of runs contained more than two entries then 'report' contains additional
-  // elements representing the mean and standard deviation of those runs.
-  // Additionally if this group of runs was the last in a family of benchmarks
-  // 'reports' contains additional entries representing the asymptotic
-  // complexity and RMS of that benchmark family.
-  virtual void ReportRuns(const std::vector<Run>& report) = 0;
-
-  // Called once and only once after ever group of benchmarks is run and
-  // reported.
-  virtual void Finalize() {}
-
-  // REQUIRES: The object referenced by 'out' is valid for the lifetime
-  // of the reporter.
-  void SetOutputStream(std::ostream* out) {
-    assert(out);
-    output_stream_ = out;
-  }
-
-  // REQUIRES: The object referenced by 'err' is valid for the lifetime
-  // of the reporter.
-  void SetErrorStream(std::ostream* err) {
-    assert(err);
-    error_stream_ = err;
-  }
-
-  std::ostream& GetOutputStream() const { return *output_stream_; }
-
-  std::ostream& GetErrorStream() const { return *error_stream_; }
-
-  virtual ~BenchmarkReporter();
-
-  // Write a human readable string to 'out' representing the specified
-  // 'context'.
-  // REQUIRES: 'out' is non-null.
-  static void PrintBasicContext(std::ostream* out, Context const& context);
-
- private:
-  std::ostream* output_stream_;
-  std::ostream* error_stream_;
-};
-
-// Simple reporter that outputs benchmark data to the console. This is the
-// default reporter used by RunSpecifiedBenchmarks().
-class ConsoleReporter : public BenchmarkReporter {
- public:
-  enum OutputOptions {
-    OO_None = 0,
-    OO_Color = 1,
-    OO_Tabular = 2,
-    OO_ColorTabular = OO_Color | OO_Tabular,
-    OO_Defaults = OO_ColorTabular
-  };
-  explicit ConsoleReporter(OutputOptions opts_ = OO_Defaults)
-      : output_options_(opts_),
-        name_field_width_(0),
-        prev_counters_(),
-        printed_header_(false) {}
-
-  virtual bool ReportContext(const Context& context);
-  virtual void ReportRuns(const std::vector<Run>& reports);
-
- protected:
-  virtual void PrintRunData(const Run& report);
-  virtual void PrintHeader(const Run& report);
-
-  OutputOptions output_options_;
-  size_t name_field_width_;
-  UserCounters prev_counters_;
-  bool printed_header_;
-};
-
-class JSONReporter : public BenchmarkReporter {
- public:
-  JSONReporter() : first_report_(true) {}
-  virtual bool ReportContext(const Context& context);
-  virtual void ReportRuns(const std::vector<Run>& reports);
-  virtual void Finalize();
-
- private:
-  void PrintRunData(const Run& report);
-
-  bool first_report_;
-};
-
-class BENCHMARK_DEPRECATED_MSG("The CSV Reporter will be removed in a future release")
-      CSVReporter : public BenchmarkReporter {
- public:
-  CSVReporter() : printed_header_(false) {}
-  virtual bool ReportContext(const Context& context);
-  virtual void ReportRuns(const std::vector<Run>& reports);
-
- private:
-  void PrintRunData(const Run& report);
-
-  bool printed_header_;
-  std::set<std::string> user_counter_names_;
-};
-
-// If a MemoryManager is registered, it can be used to collect and report
-// allocation metrics for a run of the benchmark.
-class MemoryManager {
- public:
-  struct Result {
-    Result() : num_allocs(0), max_bytes_used(0) {}
-
-    // The number of allocations made in total between Start and Stop.
-    int64_t num_allocs;
-
-    // The peak memory use between Start and Stop.
-    int64_t max_bytes_used;
-  };
-
-  virtual ~MemoryManager() {}
-
-  // Implement this to start recording allocation information.
-  virtual void Start() = 0;
-
-  // Implement this to stop recording and fill out the given Result structure.
-  virtual void Stop(Result* result) = 0;
-};
-
-inline const char* GetTimeUnitString(TimeUnit unit) {
-  switch (unit) {
-    case kMillisecond:
-      return "ms";
-    case kMicrosecond:
-      return "us";
-    case kNanosecond:
-      return "ns";
-  }
-  BENCHMARK_UNREACHABLE();
-}
-
-inline double GetTimeUnitMultiplier(TimeUnit unit) {
-  switch (unit) {
-    case kMillisecond:
-      return 1e3;
-    case kMicrosecond:
-      return 1e6;
-    case kNanosecond:
-      return 1e9;
-  }
-  BENCHMARK_UNREACHABLE();
-}
-
-}  // namespace benchmark
-
-#endif  // BENCHMARK_BENCHMARK_H_
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/requirements.txt b/gnu/llvm/libcxx/utils/google-benchmark/requirements.txt
deleted file mode 100644
index 85e89860406..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/requirements.txt
+++ /dev/null
@@ -1,2 +0,0 @@
-numpy == 1.19.4
-scipy == 1.5.4
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/setup.py b/gnu/llvm/libcxx/utils/google-benchmark/setup.py
deleted file mode 100644
index 5cdab10cf77..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/setup.py
+++ /dev/null
@@ -1,140 +0,0 @@
-import os
-import posixpath
-import re
-import shutil
-import sys
-
-from distutils import sysconfig
-import setuptools
-from setuptools.command import build_ext
-
-
-HERE = os.path.dirname(os.path.abspath(__file__))
-
-
-IS_WINDOWS = sys.platform.startswith("win")
-
-
-def _get_version():
-    """Parse the version string from __init__.py."""
-    with open(
-        os.path.join(HERE, "bindings", "python", "google_benchmark", "__init__.py")
-    ) as init_file:
-        try:
-            version_line = next(
-                line for line in init_file if line.startswith("__version__")
-            )
-        except StopIteration:
-            raise ValueError("__version__ not defined in __init__.py")
-        else:
-            namespace = {}
-            exec(version_line, namespace)  # pylint: disable=exec-used
-            return namespace["__version__"]
-
-
-def _parse_requirements(path):
-    with open(os.path.join(HERE, path)) as requirements:
-        return [
-            line.rstrip()
-            for line in requirements
-            if not (line.isspace() or line.startswith("#"))
-        ]
-
-
-class BazelExtension(setuptools.Extension):
-    """A C/C++ extension that is defined as a Bazel BUILD target."""
-
-    def __init__(self, name, bazel_target):
-        self.bazel_target = bazel_target
-        self.relpath, self.target_name = posixpath.relpath(bazel_target, "//").split(
-            ":"
-        )
-        setuptools.Extension.__init__(self, name, sources=[])
-
-
-class BuildBazelExtension(build_ext.build_ext):
-    """A command that runs Bazel to build a C/C++ extension."""
-
-    def run(self):
-        for ext in self.extensions:
-            self.bazel_build(ext)
-        build_ext.build_ext.run(self)
-
-    def bazel_build(self, ext):
-        """Runs the bazel build to create the package."""
-        with open("WORKSPACE", "r") as workspace:
-            workspace_contents = workspace.read()
-
-        with open("WORKSPACE", "w") as workspace:
-            workspace.write(
-                re.sub(
-                    r'(?<=path = ").*(?=",  # May be overwritten by setup\.py\.)',
-                    sysconfig.get_python_inc().replace(os.path.sep, posixpath.sep),
-                    workspace_contents,
-                )
-            )
-
-        if not os.path.exists(self.build_temp):
-            os.makedirs(self.build_temp)
-
-        bazel_argv = [
-            "bazel",
-            "build",
-            ext.bazel_target,
-            "--symlink_prefix=" + os.path.join(self.build_temp, "bazel-"),
-            "--compilation_mode=" + ("dbg" if self.debug else "opt"),
-        ]
-
-        if IS_WINDOWS:
-            # Link with python*.lib.
-            for library_dir in self.library_dirs:
-                bazel_argv.append("--linkopt=/LIBPATH:" + library_dir)
-
-        self.spawn(bazel_argv)
-
-        shared_lib_suffix = '.dll' if IS_WINDOWS else '.so'
-        ext_bazel_bin_path = os.path.join(
-            self.build_temp, 'bazel-bin',
-            ext.relpath, ext.target_name + shared_lib_suffix)
-
-        ext_dest_path = self.get_ext_fullpath(ext.name)
-        ext_dest_dir = os.path.dirname(ext_dest_path)
-        if not os.path.exists(ext_dest_dir):
-            os.makedirs(ext_dest_dir)
-        shutil.copyfile(ext_bazel_bin_path, ext_dest_path)
-
-
-setuptools.setup(
-    name="google_benchmark",
-    version=_get_version(),
-    url="https://github.com/google/benchmark",
-    description="A library to benchmark code snippets.",
-    author="Google",
-    author_email="benchmark-py@google.com",
-    # Contained modules and scripts.
-    package_dir={"": "bindings/python"},
-    packages=setuptools.find_packages("bindings/python"),
-    install_requires=_parse_requirements("bindings/python/requirements.txt"),
-    cmdclass=dict(build_ext=BuildBazelExtension),
-    ext_modules=[
-        BazelExtension(
-            "google_benchmark._benchmark",
-            "//bindings/python/google_benchmark:_benchmark",
-        )
-    ],
-    zip_safe=False,
-    # PyPI package information.
-    classifiers=[
-        "Development Status :: 4 - Beta",
-        "Intended Audience :: Developers",
-        "Intended Audience :: Science/Research",
-        "License :: OSI Approved :: Apache Software License",
-        "Programming Language :: Python :: 3.6",
-        "Programming Language :: Python :: 3.7",
-        "Programming Language :: Python :: 3.8",
-        "Topic :: Software Development :: Testing",
-        "Topic :: System :: Benchmark",
-    ],
-    license="Apache 2.0",
-    keywords="benchmark",
-)
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/src/CMakeLists.txt b/gnu/llvm/libcxx/utils/google-benchmark/src/CMakeLists.txt
deleted file mode 100644
index 7a77fdf41de..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/src/CMakeLists.txt
+++ /dev/null
@@ -1,108 +0,0 @@
-# Allow the source files to find headers in src/
-include_directories(${PROJECT_SOURCE_DIR}/src)
-
-if (DEFINED BENCHMARK_CXX_LINKER_FLAGS)
-  list(APPEND CMAKE_SHARED_LINKER_FLAGS ${BENCHMARK_CXX_LINKER_FLAGS})
-  list(APPEND CMAKE_MODULE_LINKER_FLAGS ${BENCHMARK_CXX_LINKER_FLAGS})
-endif()
-
-file(GLOB
-  SOURCE_FILES
-    *.cc
-    ${PROJECT_SOURCE_DIR}/include/benchmark/*.h
-    ${CMAKE_CURRENT_SOURCE_DIR}/*.h)
-file(GLOB BENCHMARK_MAIN "benchmark_main.cc")
-foreach(item ${BENCHMARK_MAIN})
-  list(REMOVE_ITEM SOURCE_FILES "${item}")
-endforeach()
-
-add_library(benchmark ${SOURCE_FILES})
-set_target_properties(benchmark PROPERTIES
-  OUTPUT_NAME "benchmark"
-  VERSION ${GENERIC_LIB_VERSION}
-  SOVERSION ${GENERIC_LIB_SOVERSION}
-)
-target_include_directories(benchmark PUBLIC
-    $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/../include>
-    )
-
-# Link threads.
-target_link_libraries(benchmark  ${BENCHMARK_CXX_LIBRARIES} ${CMAKE_THREAD_LIBS_INIT})
-find_library(LIBRT rt)
-if(LIBRT)
-  target_link_libraries(benchmark ${LIBRT})
-endif()
-
-# We need extra libraries on Windows
-if(${CMAKE_SYSTEM_NAME} MATCHES "Windows")
-  target_link_libraries(benchmark shlwapi)
-endif()
-
-# We need extra libraries on Solaris
-if(${CMAKE_SYSTEM_NAME} MATCHES "SunOS")
-  target_link_libraries(benchmark kstat)
-endif()
-
-# Benchmark main library
-add_library(benchmark_main "benchmark_main.cc")
-set_target_properties(benchmark_main PROPERTIES
-  OUTPUT_NAME "benchmark_main"
-  VERSION ${GENERIC_LIB_VERSION}
-  SOVERSION ${GENERIC_LIB_SOVERSION}
-)
-target_include_directories(benchmark PUBLIC
-    $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/../include>
-    )
-target_link_libraries(benchmark_main benchmark)
-
-set(include_install_dir "include")
-set(lib_install_dir "lib/")
-set(bin_install_dir "bin/")
-set(config_install_dir "lib/cmake/${PROJECT_NAME}")
-set(pkgconfig_install_dir "lib/pkgconfig")
-
-set(generated_dir "${CMAKE_CURRENT_BINARY_DIR}/generated")
-
-set(version_config "${generated_dir}/${PROJECT_NAME}ConfigVersion.cmake")
-set(project_config "${generated_dir}/${PROJECT_NAME}Config.cmake")
-set(pkg_config "${generated_dir}/${PROJECT_NAME}.pc")
-set(targets_export_name "${PROJECT_NAME}Targets")
-
-set(namespace "${PROJECT_NAME}::")
-
-include(CMakePackageConfigHelpers)
-write_basic_package_version_file(
-  "${version_config}" VERSION ${GENERIC_LIB_VERSION} COMPATIBILITY SameMajorVersion
-)
-
-configure_file("${PROJECT_SOURCE_DIR}/cmake/Config.cmake.in" "${project_config}" @ONLY)
-configure_file("${PROJECT_SOURCE_DIR}/cmake/benchmark.pc.in" "${pkg_config}" @ONLY)
-
-if (BENCHMARK_ENABLE_INSTALL)
-  # Install target (will install the library to specified CMAKE_INSTALL_PREFIX variable)
-  install(
-    TARGETS benchmark benchmark_main
-    EXPORT ${targets_export_name}
-    ARCHIVE DESTINATION ${lib_install_dir}
-    LIBRARY DESTINATION ${lib_install_dir}
-    RUNTIME DESTINATION ${bin_install_dir}
-    INCLUDES DESTINATION ${include_install_dir})
-
-  install(
-    DIRECTORY "${PROJECT_SOURCE_DIR}/include/benchmark"
-    DESTINATION ${include_install_dir}
-    FILES_MATCHING PATTERN "*.*h")
-
-  install(
-      FILES "${project_config}" "${version_config}"
-      DESTINATION "${config_install_dir}")
-
-  install(
-      FILES "${pkg_config}"
-      DESTINATION "${pkgconfig_install_dir}")
-
-  install(
-      EXPORT "${targets_export_name}"
-      NAMESPACE "${namespace}"
-      DESTINATION "${config_install_dir}")
-endif()
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/src/arraysize.h b/gnu/llvm/libcxx/utils/google-benchmark/src/arraysize.h
deleted file mode 100644
index 51a50f2dff2..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/src/arraysize.h
+++ /dev/null
@@ -1,33 +0,0 @@
-#ifndef BENCHMARK_ARRAYSIZE_H_
-#define BENCHMARK_ARRAYSIZE_H_
-
-#include "internal_macros.h"
-
-namespace benchmark {
-namespace internal {
-// The arraysize(arr) macro returns the # of elements in an array arr.
-// The expression is a compile-time constant, and therefore can be
-// used in defining new arrays, for example.  If you use arraysize on
-// a pointer by mistake, you will get a compile-time error.
-//
-
-// This template function declaration is used in defining arraysize.
-// Note that the function doesn't need an implementation, as we only
-// use its type.
-template <typename T, size_t N>
-char (&ArraySizeHelper(T (&array)[N]))[N];
-
-// That gcc wants both of these prototypes seems mysterious. VC, for
-// its part, can't decide which to use (another mystery). Matching of
-// template overloads: the final frontier.
-#ifndef COMPILER_MSVC
-template <typename T, size_t N>
-char (&ArraySizeHelper(const T (&array)[N]))[N];
-#endif
-
-#define arraysize(array) (sizeof(::benchmark::internal::ArraySizeHelper(array)))
-
-}  // end namespace internal
-}  // end namespace benchmark
-
-#endif  // BENCHMARK_ARRAYSIZE_H_
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/src/benchmark.cc b/gnu/llvm/libcxx/utils/google-benchmark/src/benchmark.cc
deleted file mode 100644
index aab07500af4..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/src/benchmark.cc
+++ /dev/null
@@ -1,493 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "benchmark/benchmark.h"
-#include "benchmark_api_internal.h"
-#include "benchmark_runner.h"
-#include "internal_macros.h"
-
-#ifndef BENCHMARK_OS_WINDOWS
-#ifndef BENCHMARK_OS_FUCHSIA
-#include <sys/resource.h>
-#endif
-#include <sys/time.h>
-#include <unistd.h>
-#endif
-
-#include <algorithm>
-#include <atomic>
-#include <condition_variable>
-#include <cstdio>
-#include <cstdlib>
-#include <fstream>
-#include <iostream>
-#include <memory>
-#include <string>
-#include <thread>
-#include <utility>
-
-#include "check.h"
-#include "colorprint.h"
-#include "commandlineflags.h"
-#include "complexity.h"
-#include "counter.h"
-#include "internal_macros.h"
-#include "log.h"
-#include "mutex.h"
-#include "re.h"
-#include "statistics.h"
-#include "string_util.h"
-#include "thread_manager.h"
-#include "thread_timer.h"
-
-DEFINE_bool(benchmark_list_tests, false,
-            "Print a list of benchmarks. This option overrides all other "
-            "options.");
-
-DEFINE_string(benchmark_filter, ".",
-              "A regular expression that specifies the set of benchmarks "
-              "to execute.  If this flag is empty, or if this flag is the "
-              "string \"all\", all benchmarks linked into the binary are "
-              "run.");
-
-DEFINE_double(benchmark_min_time, 0.5,
-              "Minimum number of seconds we should run benchmark before "
-              "results are considered significant.  For cpu-time based "
-              "tests, this is the lower bound on the total cpu time "
-              "used by all threads that make up the test.  For real-time "
-              "based tests, this is the lower bound on the elapsed time "
-              "of the benchmark execution, regardless of number of "
-              "threads.");
-
-DEFINE_int32(benchmark_repetitions, 1,
-             "The number of runs of each benchmark. If greater than 1, the "
-             "mean and standard deviation of the runs will be reported.");
-
-DEFINE_bool(
-    benchmark_report_aggregates_only, false,
-    "Report the result of each benchmark repetitions. When 'true' is specified "
-    "only the mean, standard deviation, and other statistics are reported for "
-    "repeated benchmarks. Affects all reporters.");
-
-DEFINE_bool(
-    benchmark_display_aggregates_only, false,
-    "Display the result of each benchmark repetitions. When 'true' is "
-    "specified only the mean, standard deviation, and other statistics are "
-    "displayed for repeated benchmarks. Unlike "
-    "benchmark_report_aggregates_only, only affects the display reporter, but "
-    "*NOT* file reporter, which will still contain all the output.");
-
-DEFINE_string(benchmark_format, "console",
-              "The format to use for console output. Valid values are "
-              "'console', 'json', or 'csv'.");
-
-DEFINE_string(benchmark_out_format, "json",
-              "The format to use for file output. Valid values are "
-              "'console', 'json', or 'csv'.");
-
-DEFINE_string(benchmark_out, "", "The file to write additional output to");
-
-DEFINE_string(benchmark_color, "auto",
-              "Whether to use colors in the output.  Valid values: "
-              "'true'/'yes'/1, 'false'/'no'/0, and 'auto'. 'auto' means to use "
-              "colors if the output is being sent to a terminal and the TERM "
-              "environment variable is set to a terminal type that supports "
-              "colors.");
-
-DEFINE_bool(benchmark_counters_tabular, false,
-            "Whether to use tabular format when printing user counters to "
-            "the console.  Valid values: 'true'/'yes'/1, 'false'/'no'/0."
-            "Defaults to false.");
-
-DEFINE_int32(v, 0, "The level of verbose logging to output");
-
-namespace benchmark {
-
-namespace internal {
-
-// FIXME: wouldn't LTO mess this up?
-void UseCharPointer(char const volatile*) {}
-
-}  // namespace internal
-
-State::State(size_t max_iters, const std::vector<int64_t>& ranges, int thread_i,
-             int n_threads, internal::ThreadTimer* timer,
-             internal::ThreadManager* manager)
-    : total_iterations_(0),
-      batch_leftover_(0),
-      max_iterations(max_iters),
-      started_(false),
-      finished_(false),
-      error_occurred_(false),
-      range_(ranges),
-      complexity_n_(0),
-      counters(),
-      thread_index(thread_i),
-      threads(n_threads),
-      timer_(timer),
-      manager_(manager) {
-  CHECK(max_iterations != 0) << "At least one iteration must be run";
-  CHECK_LT(thread_index, threads) << "thread_index must be less than threads";
-
-  // Note: The use of offsetof below is technically undefined until C++17
-  // because State is not a standard layout type. However, all compilers
-  // currently provide well-defined behavior as an extension (which is
-  // demonstrated since constexpr evaluation must diagnose all undefined
-  // behavior). However, GCC and Clang also warn about this use of offsetof,
-  // which must be suppressed.
-#if defined(__INTEL_COMPILER)
-#pragma warning push
-#pragma warning(disable:1875)
-#elif defined(__GNUC__)
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Winvalid-offsetof"
-#endif
-  // Offset tests to ensure commonly accessed data is on the first cache line.
-  const int cache_line_size = 64;
-  static_assert(offsetof(State, error_occurred_) <=
-                    (cache_line_size - sizeof(error_occurred_)),
-                "");
-#if defined(__INTEL_COMPILER)
-#pragma warning pop
-#elif defined(__GNUC__)
-#pragma GCC diagnostic pop
-#endif
-}
-
-void State::PauseTiming() {
-  // Add in time accumulated so far
-  CHECK(started_ && !finished_ && !error_occurred_);
-  timer_->StopTimer();
-}
-
-void State::ResumeTiming() {
-  CHECK(started_ && !finished_ && !error_occurred_);
-  timer_->StartTimer();
-}
-
-void State::SkipWithError(const char* msg) {
-  CHECK(msg);
-  error_occurred_ = true;
-  {
-    MutexLock l(manager_->GetBenchmarkMutex());
-    if (manager_->results.has_error_ == false) {
-      manager_->results.error_message_ = msg;
-      manager_->results.has_error_ = true;
-    }
-  }
-  total_iterations_ = 0;
-  if (timer_->running()) timer_->StopTimer();
-}
-
-void State::SetIterationTime(double seconds) {
-  timer_->SetIterationTime(seconds);
-}
-
-void State::SetLabel(const char* label) {
-  MutexLock l(manager_->GetBenchmarkMutex());
-  manager_->results.report_label_ = label;
-}
-
-void State::StartKeepRunning() {
-  CHECK(!started_ && !finished_);
-  started_ = true;
-  total_iterations_ = error_occurred_ ? 0 : max_iterations;
-  manager_->StartStopBarrier();
-  if (!error_occurred_) ResumeTiming();
-}
-
-void State::FinishKeepRunning() {
-  CHECK(started_ && (!finished_ || error_occurred_));
-  if (!error_occurred_) {
-    PauseTiming();
-  }
-  // Total iterations has now wrapped around past 0. Fix this.
-  total_iterations_ = 0;
-  finished_ = true;
-  manager_->StartStopBarrier();
-}
-
-namespace internal {
-namespace {
-
-void RunBenchmarks(const std::vector<BenchmarkInstance>& benchmarks,
-                   BenchmarkReporter* display_reporter,
-                   BenchmarkReporter* file_reporter) {
-  // Note the file_reporter can be null.
-  CHECK(display_reporter != nullptr);
-
-  // Determine the width of the name field using a minimum width of 10.
-  bool might_have_aggregates = FLAGS_benchmark_repetitions > 1;
-  size_t name_field_width = 10;
-  size_t stat_field_width = 0;
-  for (const BenchmarkInstance& benchmark : benchmarks) {
-    name_field_width =
-        std::max<size_t>(name_field_width, benchmark.name.size());
-    might_have_aggregates |= benchmark.repetitions > 1;
-
-    for (const auto& Stat : *benchmark.statistics)
-      stat_field_width = std::max<size_t>(stat_field_width, Stat.name_.size());
-  }
-  if (might_have_aggregates) name_field_width += 1 + stat_field_width;
-
-  // Print header here
-  BenchmarkReporter::Context context;
-  context.name_field_width = name_field_width;
-
-  // Keep track of running times of all instances of current benchmark
-  std::vector<BenchmarkReporter::Run> complexity_reports;
-
-  // We flush streams after invoking reporter methods that write to them. This
-  // ensures users get timely updates even when streams are not line-buffered.
-  auto flushStreams = [](BenchmarkReporter* reporter) {
-    if (!reporter) return;
-    std::flush(reporter->GetOutputStream());
-    std::flush(reporter->GetErrorStream());
-  };
-
-  if (display_reporter->ReportContext(context) &&
-      (!file_reporter || file_reporter->ReportContext(context))) {
-    flushStreams(display_reporter);
-    flushStreams(file_reporter);
-
-    for (const auto& benchmark : benchmarks) {
-      RunResults run_results = RunBenchmark(benchmark, &complexity_reports);
-
-      auto report = [&run_results](BenchmarkReporter* reporter,
-                                   bool report_aggregates_only) {
-        assert(reporter);
-        // If there are no aggregates, do output non-aggregates.
-        report_aggregates_only &= !run_results.aggregates_only.empty();
-        if (!report_aggregates_only)
-          reporter->ReportRuns(run_results.non_aggregates);
-        if (!run_results.aggregates_only.empty())
-          reporter->ReportRuns(run_results.aggregates_only);
-      };
-
-      report(display_reporter, run_results.display_report_aggregates_only);
-      if (file_reporter)
-        report(file_reporter, run_results.file_report_aggregates_only);
-
-      flushStreams(display_reporter);
-      flushStreams(file_reporter);
-    }
-  }
-  display_reporter->Finalize();
-  if (file_reporter) file_reporter->Finalize();
-  flushStreams(display_reporter);
-  flushStreams(file_reporter);
-}
-
-std::unique_ptr<BenchmarkReporter> CreateReporter(
-    std::string const& name, ConsoleReporter::OutputOptions output_opts) {
-  typedef std::unique_ptr<BenchmarkReporter> PtrType;
-  if (name == "console") {
-    return PtrType(new ConsoleReporter(output_opts));
-  } else if (name == "json") {
-    return PtrType(new JSONReporter);
-  } else if (name == "csv") {
-    return PtrType(new CSVReporter);
-  } else {
-    std::cerr << "Unexpected format: '" << name << "'\n";
-    std::exit(1);
-  }
-}
-
-}  // end namespace
-
-bool IsZero(double n) {
-  return std::abs(n) < std::numeric_limits<double>::epsilon();
-}
-
-ConsoleReporter::OutputOptions GetOutputOptions(bool force_no_color) {
-  int output_opts = ConsoleReporter::OO_Defaults;
-  auto is_benchmark_color = [force_no_color] () -> bool {
-    if (force_no_color) {
-      return false;
-    }
-    if (FLAGS_benchmark_color == "auto") {
-      return IsColorTerminal();
-    }
-    return IsTruthyFlagValue(FLAGS_benchmark_color);
-  };
-  if (is_benchmark_color()) {
-    output_opts |= ConsoleReporter::OO_Color;
-  } else {
-    output_opts &= ~ConsoleReporter::OO_Color;
-  }
-  if (FLAGS_benchmark_counters_tabular) {
-    output_opts |= ConsoleReporter::OO_Tabular;
-  } else {
-    output_opts &= ~ConsoleReporter::OO_Tabular;
-  }
-  return static_cast<ConsoleReporter::OutputOptions>(output_opts);
-}
-
-}  // end namespace internal
-
-size_t RunSpecifiedBenchmarks() {
-  return RunSpecifiedBenchmarks(nullptr, nullptr);
-}
-
-size_t RunSpecifiedBenchmarks(BenchmarkReporter* display_reporter) {
-  return RunSpecifiedBenchmarks(display_reporter, nullptr);
-}
-
-size_t RunSpecifiedBenchmarks(BenchmarkReporter* display_reporter,
-                              BenchmarkReporter* file_reporter) {
-  std::string spec = FLAGS_benchmark_filter;
-  if (spec.empty() || spec == "all")
-    spec = ".";  // Regexp that matches all benchmarks
-
-  // Setup the reporters
-  std::ofstream output_file;
-  std::unique_ptr<BenchmarkReporter> default_display_reporter;
-  std::unique_ptr<BenchmarkReporter> default_file_reporter;
-  if (!display_reporter) {
-    default_display_reporter = internal::CreateReporter(
-        FLAGS_benchmark_format, internal::GetOutputOptions());
-    display_reporter = default_display_reporter.get();
-  }
-  auto& Out = display_reporter->GetOutputStream();
-  auto& Err = display_reporter->GetErrorStream();
-
-  std::string const& fname = FLAGS_benchmark_out;
-  if (fname.empty() && file_reporter) {
-    Err << "A custom file reporter was provided but "
-           "--benchmark_out=<file> was not specified."
-        << std::endl;
-    std::exit(1);
-  }
-  if (!fname.empty()) {
-    output_file.open(fname);
-    if (!output_file.is_open()) {
-      Err << "invalid file name: '" << fname << std::endl;
-      std::exit(1);
-    }
-    if (!file_reporter) {
-      default_file_reporter = internal::CreateReporter(
-          FLAGS_benchmark_out_format, ConsoleReporter::OO_None);
-      file_reporter = default_file_reporter.get();
-    }
-    file_reporter->SetOutputStream(&output_file);
-    file_reporter->SetErrorStream(&output_file);
-  }
-
-  std::vector<internal::BenchmarkInstance> benchmarks;
-  if (!FindBenchmarksInternal(spec, &benchmarks, &Err)) return 0;
-
-  if (benchmarks.empty()) {
-    Err << "Failed to match any benchmarks against regex: " << spec << "\n";
-    return 0;
-  }
-
-  if (FLAGS_benchmark_list_tests) {
-    for (auto const& benchmark : benchmarks) Out << benchmark.name << "\n";
-  } else {
-    internal::RunBenchmarks(benchmarks, display_reporter, file_reporter);
-  }
-
-  return benchmarks.size();
-}
-
-void RegisterMemoryManager(MemoryManager* manager) {
-  internal::memory_manager = manager;
-}
-
-namespace internal {
-
-void PrintUsageAndExit() {
-  fprintf(stdout,
-          "benchmark"
-          " [--benchmark_list_tests={true|false}]\n"
-          "          [--benchmark_filter=<regex>]\n"
-          "          [--benchmark_min_time=<min_time>]\n"
-          "          [--benchmark_repetitions=<num_repetitions>]\n"
-          "          [--benchmark_report_aggregates_only={true|false}]\n"
-          "          [--benchmark_display_aggregates_only={true|false}]\n"
-          "          [--benchmark_format=<console|json|csv>]\n"
-          "          [--benchmark_out=<filename>]\n"
-          "          [--benchmark_out_format=<json|console|csv>]\n"
-          "          [--benchmark_color={auto|true|false}]\n"
-          "          [--benchmark_counters_tabular={true|false}]\n"
-          "          [--v=<verbosity>]\n");
-  exit(0);
-}
-
-void ParseCommandLineFlags(int* argc, char** argv) {
-  using namespace benchmark;
-  BenchmarkReporter::Context::executable_name =
-      (argc && *argc > 0) ? argv[0] : "unknown";
-  for (int i = 1; i < *argc; ++i) {
-    if (ParseBoolFlag(argv[i], "benchmark_list_tests",
-                      &FLAGS_benchmark_list_tests) ||
-        ParseStringFlag(argv[i], "benchmark_filter", &FLAGS_benchmark_filter) ||
-        ParseDoubleFlag(argv[i], "benchmark_min_time",
-                        &FLAGS_benchmark_min_time) ||
-        ParseInt32Flag(argv[i], "benchmark_repetitions",
-                       &FLAGS_benchmark_repetitions) ||
-        ParseBoolFlag(argv[i], "benchmark_report_aggregates_only",
-                      &FLAGS_benchmark_report_aggregates_only) ||
-        ParseBoolFlag(argv[i], "benchmark_display_aggregates_only",
-                      &FLAGS_benchmark_display_aggregates_only) ||
-        ParseStringFlag(argv[i], "benchmark_format", &FLAGS_benchmark_format) ||
-        ParseStringFlag(argv[i], "benchmark_out", &FLAGS_benchmark_out) ||
-        ParseStringFlag(argv[i], "benchmark_out_format",
-                        &FLAGS_benchmark_out_format) ||
-        ParseStringFlag(argv[i], "benchmark_color", &FLAGS_benchmark_color) ||
-        // "color_print" is the deprecated name for "benchmark_color".
-        // TODO: Remove this.
-        ParseStringFlag(argv[i], "color_print", &FLAGS_benchmark_color) ||
-        ParseBoolFlag(argv[i], "benchmark_counters_tabular",
-                      &FLAGS_benchmark_counters_tabular) ||
-        ParseInt32Flag(argv[i], "v", &FLAGS_v)) {
-      for (int j = i; j != *argc - 1; ++j) argv[j] = argv[j + 1];
-
-      --(*argc);
-      --i;
-    } else if (IsFlag(argv[i], "help")) {
-      PrintUsageAndExit();
-    }
-  }
-  for (auto const* flag :
-       {&FLAGS_benchmark_format, &FLAGS_benchmark_out_format})
-    if (*flag != "console" && *flag != "json" && *flag != "csv") {
-      PrintUsageAndExit();
-    }
-  if (FLAGS_benchmark_color.empty()) {
-    PrintUsageAndExit();
-  }
-}
-
-int InitializeStreams() {
-  static std::ios_base::Init init;
-  return 0;
-}
-
-}  // end namespace internal
-
-void Initialize(int* argc, char** argv) {
-  internal::ParseCommandLineFlags(argc, argv);
-  internal::LogLevel() = FLAGS_v;
-}
-
-bool ReportUnrecognizedArguments(int argc, char** argv) {
-  for (int i = 1; i < argc; ++i) {
-    fprintf(stderr, "%s: error: unrecognized command-line flag: %s\n", argv[0],
-            argv[i]);
-  }
-  return argc > 1;
-}
-
-}  // end namespace benchmark
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/src/benchmark_api_internal.cc b/gnu/llvm/libcxx/utils/google-benchmark/src/benchmark_api_internal.cc
deleted file mode 100644
index 8d3108363b8..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/src/benchmark_api_internal.cc
+++ /dev/null
@@ -1,15 +0,0 @@
-#include "benchmark_api_internal.h"
-
-namespace benchmark {
-namespace internal {
-
-State BenchmarkInstance::Run(
-    size_t iters, int thread_id, internal::ThreadTimer* timer,
-    internal::ThreadManager* manager) const {
-  State st(iters, arg, thread_id, threads, timer, manager);
-  benchmark->Run(st);
-  return st;
-}
-
-}  // internal
-}  // benchmark
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/src/benchmark_api_internal.h b/gnu/llvm/libcxx/utils/google-benchmark/src/benchmark_api_internal.h
deleted file mode 100644
index 0524a85c01d..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/src/benchmark_api_internal.h
+++ /dev/null
@@ -1,52 +0,0 @@
-#ifndef BENCHMARK_API_INTERNAL_H
-#define BENCHMARK_API_INTERNAL_H
-
-#include "benchmark/benchmark.h"
-#include "commandlineflags.h"
-
-#include <cmath>
-#include <iosfwd>
-#include <limits>
-#include <memory>
-#include <string>
-#include <vector>
-
-namespace benchmark {
-namespace internal {
-
-// Information kept per benchmark we may want to run
-struct BenchmarkInstance {
-  std::string name;
-  Benchmark* benchmark;
-  AggregationReportMode aggregation_report_mode;
-  std::vector<int64_t> arg;
-  TimeUnit time_unit;
-  int range_multiplier;
-  bool use_real_time;
-  bool use_manual_time;
-  BigO complexity;
-  BigOFunc* complexity_lambda;
-  UserCounters counters;
-  const std::vector<Statistics>* statistics;
-  bool last_benchmark_instance;
-  int repetitions;
-  double min_time;
-  size_t iterations;
-  int threads;  // Number of concurrent threads to us
-
-  State Run(size_t iters, int thread_id, internal::ThreadTimer* timer,
-            internal::ThreadManager* manager) const;
-};
-
-bool FindBenchmarksInternal(const std::string& re,
-                            std::vector<BenchmarkInstance>* benchmarks,
-                            std::ostream* Err);
-
-bool IsZero(double n);
-
-ConsoleReporter::OutputOptions GetOutputOptions(bool force_no_color = false);
-
-}  // end namespace internal
-}  // end namespace benchmark
-
-#endif  // BENCHMARK_API_INTERNAL_H
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/src/benchmark_main.cc b/gnu/llvm/libcxx/utils/google-benchmark/src/benchmark_main.cc
deleted file mode 100644
index b3b24783149..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/src/benchmark_main.cc
+++ /dev/null
@@ -1,17 +0,0 @@
-// Copyright 2018 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "benchmark/benchmark.h"
-
-BENCHMARK_MAIN();
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/src/benchmark_name.cc b/gnu/llvm/libcxx/utils/google-benchmark/src/benchmark_name.cc
deleted file mode 100644
index 2a17ebce277..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/src/benchmark_name.cc
+++ /dev/null
@@ -1,58 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include <benchmark/benchmark.h>
-
-namespace benchmark {
-
-namespace {
-
-// Compute the total size of a pack of std::strings
-size_t size_impl() { return 0; }
-
-template <typename Head, typename... Tail>
-size_t size_impl(const Head& head, const Tail&... tail) {
-  return head.size() + size_impl(tail...);
-}
-
-// Join a pack of std::strings using a delimiter
-// TODO: use absl::StrJoin
-void join_impl(std::string&, char) {}
-
-template <typename Head, typename... Tail>
-void join_impl(std::string& s, const char delimiter, const Head& head,
-               const Tail&... tail) {
-  if (!s.empty() && !head.empty()) {
-    s += delimiter;
-  }
-
-  s += head;
-
-  join_impl(s, delimiter, tail...);
-}
-
-template <typename... Ts>
-std::string join(char delimiter, const Ts&... ts) {
-  std::string s;
-  s.reserve(sizeof...(Ts) + size_impl(ts...));
-  join_impl(s, delimiter, ts...);
-  return s;
-}
-}  // namespace
-
-std::string BenchmarkName::str() const {
-  return join('/', function_name, args, min_time, iterations, repetitions,
-              time_type, threads);
-}
-}  // namespace benchmark
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/src/benchmark_register.cc b/gnu/llvm/libcxx/utils/google-benchmark/src/benchmark_register.cc
deleted file mode 100644
index f17f5b223ce..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/src/benchmark_register.cc
+++ /dev/null
@@ -1,482 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "benchmark_register.h"
-
-#ifndef BENCHMARK_OS_WINDOWS
-#ifndef BENCHMARK_OS_FUCHSIA
-#include <sys/resource.h>
-#endif
-#include <sys/time.h>
-#include <unistd.h>
-#endif
-
-#include <algorithm>
-#include <atomic>
-#include <condition_variable>
-#include <cstdio>
-#include <cstdlib>
-#include <cstring>
-#include <fstream>
-#include <iostream>
-#include <memory>
-#include <sstream>
-#include <thread>
-
-#include "benchmark/benchmark.h"
-#include "benchmark_api_internal.h"
-#include "check.h"
-#include "commandlineflags.h"
-#include "complexity.h"
-#include "internal_macros.h"
-#include "log.h"
-#include "mutex.h"
-#include "re.h"
-#include "statistics.h"
-#include "string_util.h"
-#include "timers.h"
-
-namespace benchmark {
-
-namespace {
-// For non-dense Range, intermediate values are powers of kRangeMultiplier.
-static const int kRangeMultiplier = 8;
-// The size of a benchmark family determines is the number of inputs to repeat
-// the benchmark on. If this is "large" then warn the user during configuration.
-static const size_t kMaxFamilySize = 100;
-}  // end namespace
-
-namespace internal {
-
-//=============================================================================//
-//                         BenchmarkFamilies
-//=============================================================================//
-
-// Class for managing registered benchmarks.  Note that each registered
-// benchmark identifies a family of related benchmarks to run.
-class BenchmarkFamilies {
- public:
-  static BenchmarkFamilies* GetInstance();
-
-  // Registers a benchmark family and returns the index assigned to it.
-  size_t AddBenchmark(std::unique_ptr<Benchmark> family);
-
-  // Clear all registered benchmark families.
-  void ClearBenchmarks();
-
-  // Extract the list of benchmark instances that match the specified
-  // regular expression.
-  bool FindBenchmarks(std::string re,
-                      std::vector<BenchmarkInstance>* benchmarks,
-                      std::ostream* Err);
-
- private:
-  BenchmarkFamilies() {}
-
-  std::vector<std::unique_ptr<Benchmark>> families_;
-  Mutex mutex_;
-};
-
-BenchmarkFamilies* BenchmarkFamilies::GetInstance() {
-  static BenchmarkFamilies instance;
-  return &instance;
-}
-
-size_t BenchmarkFamilies::AddBenchmark(std::unique_ptr<Benchmark> family) {
-  MutexLock l(mutex_);
-  size_t index = families_.size();
-  families_.push_back(std::move(family));
-  return index;
-}
-
-void BenchmarkFamilies::ClearBenchmarks() {
-  MutexLock l(mutex_);
-  families_.clear();
-  families_.shrink_to_fit();
-}
-
-bool BenchmarkFamilies::FindBenchmarks(
-    std::string spec, std::vector<BenchmarkInstance>* benchmarks,
-    std::ostream* ErrStream) {
-  CHECK(ErrStream);
-  auto& Err = *ErrStream;
-  // Make regular expression out of command-line flag
-  std::string error_msg;
-  Regex re;
-  bool isNegativeFilter = false;
-  if (spec[0] == '-') {
-    spec.replace(0, 1, "");
-    isNegativeFilter = true;
-  }
-  if (!re.Init(spec, &error_msg)) {
-    Err << "Could not compile benchmark re: " << error_msg << std::endl;
-    return false;
-  }
-
-  // Special list of thread counts to use when none are specified
-  const std::vector<int> one_thread = {1};
-
-  MutexLock l(mutex_);
-  for (std::unique_ptr<Benchmark>& family : families_) {
-    // Family was deleted or benchmark doesn't match
-    if (!family) continue;
-
-    if (family->ArgsCnt() == -1) {
-      family->Args({});
-    }
-    const std::vector<int>* thread_counts =
-        (family->thread_counts_.empty()
-             ? &one_thread
-             : &static_cast<const std::vector<int>&>(family->thread_counts_));
-    const size_t family_size = family->args_.size() * thread_counts->size();
-    // The benchmark will be run at least 'family_size' different inputs.
-    // If 'family_size' is very large warn the user.
-    if (family_size > kMaxFamilySize) {
-      Err << "The number of inputs is very large. " << family->name_
-          << " will be repeated at least " << family_size << " times.\n";
-    }
-    // reserve in the special case the regex ".", since we know the final
-    // family size.
-    if (spec == ".") benchmarks->reserve(family_size);
-
-    for (auto const& args : family->args_) {
-      for (int num_threads : *thread_counts) {
-        BenchmarkInstance instance;
-        instance.name = family->name_;
-        instance.benchmark = family.get();
-        instance.aggregation_report_mode = family->aggregation_report_mode_;
-        instance.arg = args;
-        instance.time_unit = family->time_unit_;
-        instance.range_multiplier = family->range_multiplier_;
-        instance.min_time = family->min_time_;
-        instance.iterations = family->iterations_;
-        instance.repetitions = family->repetitions_;
-        instance.use_real_time = family->use_real_time_;
-        instance.use_manual_time = family->use_manual_time_;
-        instance.complexity = family->complexity_;
-        instance.complexity_lambda = family->complexity_lambda_;
-        instance.statistics = &family->statistics_;
-        instance.threads = num_threads;
-
-        // Add arguments to instance name
-        size_t arg_i = 0;
-        for (auto const& arg : args) {
-          instance.name += "/";
-
-          if (arg_i < family->arg_names_.size()) {
-            const auto& arg_name = family->arg_names_[arg_i];
-            if (!arg_name.empty()) {
-              instance.name +=
-                  StrFormat("%s:", family->arg_names_[arg_i].c_str());
-            }
-          }
-
-          // we know that the args are always non-negative (see 'AddRange()'),
-          // thus print as 'unsigned'. BUT, do a cast due to the 32-bit builds.
-          instance.name += StrFormat("%lu", static_cast<unsigned long>(arg));
-          ++arg_i;
-        }
-
-        if (!IsZero(family->min_time_))
-          instance.name += StrFormat("/min_time:%0.3f", family->min_time_);
-        if (family->iterations_ != 0) {
-          instance.name +=
-              StrFormat("/iterations:%lu",
-                        static_cast<unsigned long>(family->iterations_));
-        }
-        if (family->repetitions_ != 0)
-          instance.name += StrFormat("/repeats:%d", family->repetitions_);
-
-        if (family->use_manual_time_) {
-          instance.name += "/manual_time";
-        } else if (family->use_real_time_) {
-          instance.name += "/real_time";
-        }
-
-        // Add the number of threads used to the name
-        if (!family->thread_counts_.empty()) {
-          instance.name += StrFormat("/threads:%d", instance.threads);
-        }
-
-        if ((re.Match(instance.name) && !isNegativeFilter) ||
-            (!re.Match(instance.name) && isNegativeFilter)) {
-          instance.last_benchmark_instance = (&args == &family->args_.back());
-          benchmarks->push_back(std::move(instance));
-        }
-      }
-    }
-  }
-  return true;
-}
-
-Benchmark* RegisterBenchmarkInternal(Benchmark* bench) {
-  std::unique_ptr<Benchmark> bench_ptr(bench);
-  BenchmarkFamilies* families = BenchmarkFamilies::GetInstance();
-  families->AddBenchmark(std::move(bench_ptr));
-  return bench;
-}
-
-// FIXME: This function is a hack so that benchmark.cc can access
-// `BenchmarkFamilies`
-bool FindBenchmarksInternal(const std::string& re,
-                            std::vector<BenchmarkInstance>* benchmarks,
-                            std::ostream* Err) {
-  return BenchmarkFamilies::GetInstance()->FindBenchmarks(re, benchmarks, Err);
-}
-
-//=============================================================================//
-//                               Benchmark
-//=============================================================================//
-
-Benchmark::Benchmark(const char* name)
-    : name_(name),
-      aggregation_report_mode_(ARM_Unspecified),
-      time_unit_(kNanosecond),
-      range_multiplier_(kRangeMultiplier),
-      min_time_(0),
-      iterations_(0),
-      repetitions_(0),
-      use_real_time_(false),
-      use_manual_time_(false),
-      complexity_(oNone),
-      complexity_lambda_(nullptr) {
-  ComputeStatistics("mean", StatisticsMean);
-  ComputeStatistics("median", StatisticsMedian);
-  ComputeStatistics("stddev", StatisticsStdDev);
-}
-
-Benchmark::~Benchmark() {}
-
-Benchmark* Benchmark::Arg(int64_t x) {
-  CHECK(ArgsCnt() == -1 || ArgsCnt() == 1);
-  args_.push_back({x});
-  return this;
-}
-
-Benchmark* Benchmark::Unit(TimeUnit unit) {
-  time_unit_ = unit;
-  return this;
-}
-
-Benchmark* Benchmark::Range(int64_t start, int64_t limit) {
-  CHECK(ArgsCnt() == -1 || ArgsCnt() == 1);
-  std::vector<int64_t> arglist;
-  AddRange(&arglist, start, limit, range_multiplier_);
-
-  for (int64_t i : arglist) {
-    args_.push_back({i});
-  }
-  return this;
-}
-
-Benchmark* Benchmark::Ranges(
-    const std::vector<std::pair<int64_t, int64_t>>& ranges) {
-  CHECK(ArgsCnt() == -1 || ArgsCnt() == static_cast<int>(ranges.size()));
-  std::vector<std::vector<int64_t>> arglists(ranges.size());
-  std::size_t total = 1;
-  for (std::size_t i = 0; i < ranges.size(); i++) {
-    AddRange(&arglists[i], ranges[i].first, ranges[i].second,
-             range_multiplier_);
-    total *= arglists[i].size();
-  }
-
-  std::vector<std::size_t> ctr(arglists.size(), 0);
-
-  for (std::size_t i = 0; i < total; i++) {
-    std::vector<int64_t> tmp;
-    tmp.reserve(arglists.size());
-
-    for (std::size_t j = 0; j < arglists.size(); j++) {
-      tmp.push_back(arglists[j].at(ctr[j]));
-    }
-
-    args_.push_back(std::move(tmp));
-
-    for (std::size_t j = 0; j < arglists.size(); j++) {
-      if (ctr[j] + 1 < arglists[j].size()) {
-        ++ctr[j];
-        break;
-      }
-      ctr[j] = 0;
-    }
-  }
-  return this;
-}
-
-Benchmark* Benchmark::ArgName(const std::string& name) {
-  CHECK(ArgsCnt() == -1 || ArgsCnt() == 1);
-  arg_names_ = {name};
-  return this;
-}
-
-Benchmark* Benchmark::ArgNames(const std::vector<std::string>& names) {
-  CHECK(ArgsCnt() == -1 || ArgsCnt() == static_cast<int>(names.size()));
-  arg_names_ = names;
-  return this;
-}
-
-Benchmark* Benchmark::DenseRange(int64_t start, int64_t limit, int step) {
-  CHECK(ArgsCnt() == -1 || ArgsCnt() == 1);
-  CHECK_GE(start, 0);
-  CHECK_LE(start, limit);
-  for (int64_t arg = start; arg <= limit; arg += step) {
-    args_.push_back({arg});
-  }
-  return this;
-}
-
-Benchmark* Benchmark::Args(const std::vector<int64_t>& args) {
-  CHECK(ArgsCnt() == -1 || ArgsCnt() == static_cast<int>(args.size()));
-  args_.push_back(args);
-  return this;
-}
-
-Benchmark* Benchmark::Apply(void (*custom_arguments)(Benchmark* benchmark)) {
-  custom_arguments(this);
-  return this;
-}
-
-Benchmark* Benchmark::RangeMultiplier(int multiplier) {
-  CHECK(multiplier > 1);
-  range_multiplier_ = multiplier;
-  return this;
-}
-
-Benchmark* Benchmark::MinTime(double t) {
-  CHECK(t > 0.0);
-  CHECK(iterations_ == 0);
-  min_time_ = t;
-  return this;
-}
-
-Benchmark* Benchmark::Iterations(size_t n) {
-  CHECK(n > 0);
-  CHECK(IsZero(min_time_));
-  iterations_ = n;
-  return this;
-}
-
-Benchmark* Benchmark::Repetitions(int n) {
-  CHECK(n > 0);
-  repetitions_ = n;
-  return this;
-}
-
-Benchmark* Benchmark::ReportAggregatesOnly(bool value) {
-  aggregation_report_mode_ = value ? ARM_ReportAggregatesOnly : ARM_Default;
-  return this;
-}
-
-Benchmark* Benchmark::DisplayAggregatesOnly(bool value) {
-  // If we were called, the report mode is no longer 'unspecified', in any case.
-  aggregation_report_mode_ = static_cast<AggregationReportMode>(
-      aggregation_report_mode_ | ARM_Default);
-
-  if (value) {
-    aggregation_report_mode_ = static_cast<AggregationReportMode>(
-        aggregation_report_mode_ | ARM_DisplayReportAggregatesOnly);
-  } else {
-    aggregation_report_mode_ = static_cast<AggregationReportMode>(
-        aggregation_report_mode_ & ~ARM_DisplayReportAggregatesOnly);
-  }
-
-  return this;
-}
-
-Benchmark* Benchmark::UseRealTime() {
-  CHECK(!use_manual_time_)
-      << "Cannot set UseRealTime and UseManualTime simultaneously.";
-  use_real_time_ = true;
-  return this;
-}
-
-Benchmark* Benchmark::UseManualTime() {
-  CHECK(!use_real_time_)
-      << "Cannot set UseRealTime and UseManualTime simultaneously.";
-  use_manual_time_ = true;
-  return this;
-}
-
-Benchmark* Benchmark::Complexity(BigO complexity) {
-  complexity_ = complexity;
-  return this;
-}
-
-Benchmark* Benchmark::Complexity(BigOFunc* complexity) {
-  complexity_lambda_ = complexity;
-  complexity_ = oLambda;
-  return this;
-}
-
-Benchmark* Benchmark::ComputeStatistics(std::string name,
-                                        StatisticsFunc* statistics) {
-  statistics_.emplace_back(name, statistics);
-  return this;
-}
-
-Benchmark* Benchmark::Threads(int t) {
-  CHECK_GT(t, 0);
-  thread_counts_.push_back(t);
-  return this;
-}
-
-Benchmark* Benchmark::ThreadRange(int min_threads, int max_threads) {
-  CHECK_GT(min_threads, 0);
-  CHECK_GE(max_threads, min_threads);
-
-  AddRange(&thread_counts_, min_threads, max_threads, 2);
-  return this;
-}
-
-Benchmark* Benchmark::DenseThreadRange(int min_threads, int max_threads,
-                                       int stride) {
-  CHECK_GT(min_threads, 0);
-  CHECK_GE(max_threads, min_threads);
-  CHECK_GE(stride, 1);
-
-  for (auto i = min_threads; i < max_threads; i += stride) {
-    thread_counts_.push_back(i);
-  }
-  thread_counts_.push_back(max_threads);
-  return this;
-}
-
-Benchmark* Benchmark::ThreadPerCpu() {
-  thread_counts_.push_back(CPUInfo::Get().num_cpus);
-  return this;
-}
-
-void Benchmark::SetName(const char* name) { name_ = name; }
-
-int Benchmark::ArgsCnt() const {
-  if (args_.empty()) {
-    if (arg_names_.empty()) return -1;
-    return static_cast<int>(arg_names_.size());
-  }
-  return static_cast<int>(args_.front().size());
-}
-
-//=============================================================================//
-//                            FunctionBenchmark
-//=============================================================================//
-
-void FunctionBenchmark::Run(State& st) { func_(st); }
-
-}  // end namespace internal
-
-void ClearRegisteredBenchmarks() {
-  internal::BenchmarkFamilies::GetInstance()->ClearBenchmarks();
-}
-
-}  // end namespace benchmark
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/src/benchmark_register.h b/gnu/llvm/libcxx/utils/google-benchmark/src/benchmark_register.h
deleted file mode 100644
index 0705e219f2f..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/src/benchmark_register.h
+++ /dev/null
@@ -1,33 +0,0 @@
-#ifndef BENCHMARK_REGISTER_H
-#define BENCHMARK_REGISTER_H
-
-#include <vector>
-
-#include "check.h"
-
-template <typename T>
-void AddRange(std::vector<T>* dst, T lo, T hi, int mult) {
-  CHECK_GE(lo, 0);
-  CHECK_GE(hi, lo);
-  CHECK_GE(mult, 2);
-
-  // Add "lo"
-  dst->push_back(lo);
-
-  static const T kmax = std::numeric_limits<T>::max();
-
-  // Now space out the benchmarks in multiples of "mult"
-  for (T i = 1; i < kmax / mult; i *= mult) {
-    if (i >= hi) break;
-    if (i > lo) {
-      dst->push_back(i);
-    }
-  }
-
-  // Add "hi" (if different from "lo")
-  if (hi != lo) {
-    dst->push_back(hi);
-  }
-}
-
-#endif  // BENCHMARK_REGISTER_H
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/src/benchmark_runner.cc b/gnu/llvm/libcxx/utils/google-benchmark/src/benchmark_runner.cc
deleted file mode 100644
index 38faeec8e3e..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/src/benchmark_runner.cc
+++ /dev/null
@@ -1,350 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "benchmark_runner.h"
-#include "benchmark/benchmark.h"
-#include "benchmark_api_internal.h"
-#include "internal_macros.h"
-
-#ifndef BENCHMARK_OS_WINDOWS
-#ifndef BENCHMARK_OS_FUCHSIA
-#include <sys/resource.h>
-#endif
-#include <sys/time.h>
-#include <unistd.h>
-#endif
-
-#include <algorithm>
-#include <atomic>
-#include <condition_variable>
-#include <cstdio>
-#include <cstdlib>
-#include <fstream>
-#include <iostream>
-#include <memory>
-#include <string>
-#include <thread>
-#include <utility>
-
-#include "check.h"
-#include "colorprint.h"
-#include "commandlineflags.h"
-#include "complexity.h"
-#include "counter.h"
-#include "internal_macros.h"
-#include "log.h"
-#include "mutex.h"
-#include "re.h"
-#include "statistics.h"
-#include "string_util.h"
-#include "thread_manager.h"
-#include "thread_timer.h"
-
-namespace benchmark {
-
-namespace internal {
-
-MemoryManager* memory_manager = nullptr;
-
-namespace {
-
-static const size_t kMaxIterations = 1000000000;
-
-BenchmarkReporter::Run CreateRunReport(
-    const benchmark::internal::BenchmarkInstance& b,
-    const internal::ThreadManager::Result& results, size_t memory_iterations,
-    const MemoryManager::Result& memory_result, double seconds) {
-  // Create report about this benchmark run.
-  BenchmarkReporter::Run report;
-
-  report.run_name = b.name;
-  report.error_occurred = results.has_error_;
-  report.error_message = results.error_message_;
-  report.report_label = results.report_label_;
-  // This is the total iterations across all threads.
-  report.iterations = results.iterations;
-  report.time_unit = b.time_unit;
-
-  if (!report.error_occurred) {
-    if (b.use_manual_time) {
-      report.real_accumulated_time = results.manual_time_used;
-    } else {
-      report.real_accumulated_time = results.real_time_used;
-    }
-    report.cpu_accumulated_time = results.cpu_time_used;
-    report.complexity_n = results.complexity_n;
-    report.complexity = b.complexity;
-    report.complexity_lambda = b.complexity_lambda;
-    report.statistics = b.statistics;
-    report.counters = results.counters;
-
-    if (memory_iterations > 0) {
-      report.has_memory_result = true;
-      report.allocs_per_iter =
-          memory_iterations ? static_cast<double>(memory_result.num_allocs) /
-                                  memory_iterations
-                            : 0;
-      report.max_bytes_used = memory_result.max_bytes_used;
-    }
-
-    internal::Finish(&report.counters, results.iterations, seconds, b.threads);
-  }
-  return report;
-}
-
-// Execute one thread of benchmark b for the specified number of iterations.
-// Adds the stats collected for the thread into *total.
-void RunInThread(const BenchmarkInstance* b, size_t iters, int thread_id,
-                 ThreadManager* manager) {
-  internal::ThreadTimer timer;
-  State st = b->Run(iters, thread_id, &timer, manager);
-  CHECK(st.iterations() >= st.max_iterations)
-      << "Benchmark returned before State::KeepRunning() returned false!";
-  {
-    MutexLock l(manager->GetBenchmarkMutex());
-    internal::ThreadManager::Result& results = manager->results;
-    results.iterations += st.iterations();
-    results.cpu_time_used += timer.cpu_time_used();
-    results.real_time_used += timer.real_time_used();
-    results.manual_time_used += timer.manual_time_used();
-    results.complexity_n += st.complexity_length_n();
-    internal::Increment(&results.counters, st.counters);
-  }
-  manager->NotifyThreadComplete();
-}
-
-class BenchmarkRunner {
- public:
-  BenchmarkRunner(const benchmark::internal::BenchmarkInstance& b_,
-                  std::vector<BenchmarkReporter::Run>* complexity_reports_)
-      : b(b_),
-        complexity_reports(*complexity_reports_),
-        min_time(!IsZero(b.min_time) ? b.min_time : FLAGS_benchmark_min_time),
-        repeats(b.repetitions != 0 ? b.repetitions
-                                   : FLAGS_benchmark_repetitions),
-        has_explicit_iteration_count(b.iterations != 0),
-        pool(b.threads - 1),
-        iters(has_explicit_iteration_count ? b.iterations : 1) {
-    run_results.display_report_aggregates_only =
-        (FLAGS_benchmark_report_aggregates_only ||
-         FLAGS_benchmark_display_aggregates_only);
-    run_results.file_report_aggregates_only =
-        FLAGS_benchmark_report_aggregates_only;
-    if (b.aggregation_report_mode != internal::ARM_Unspecified) {
-      run_results.display_report_aggregates_only =
-          (b.aggregation_report_mode &
-           internal::ARM_DisplayReportAggregatesOnly);
-      run_results.file_report_aggregates_only =
-          (b.aggregation_report_mode & internal::ARM_FileReportAggregatesOnly);
-    }
-
-    for (int repetition_num = 0; repetition_num < repeats; repetition_num++) {
-      const bool is_the_first_repetition = repetition_num == 0;
-      DoOneRepetition(is_the_first_repetition);
-    }
-
-    // Calculate additional statistics
-    run_results.aggregates_only = ComputeStats(run_results.non_aggregates);
-
-    // Maybe calculate complexity report
-    if ((b.complexity != oNone) && b.last_benchmark_instance) {
-      auto additional_run_stats = ComputeBigO(complexity_reports);
-      run_results.aggregates_only.insert(run_results.aggregates_only.end(),
-                                         additional_run_stats.begin(),
-                                         additional_run_stats.end());
-      complexity_reports.clear();
-    }
-  }
-
-  RunResults&& get_results() { return std::move(run_results); }
-
- private:
-  RunResults run_results;
-
-  const benchmark::internal::BenchmarkInstance& b;
-  std::vector<BenchmarkReporter::Run>& complexity_reports;
-
-  const double min_time;
-  const int repeats;
-  const bool has_explicit_iteration_count;
-
-  std::vector<std::thread> pool;
-
-  size_t iters;  // preserved between repetitions!
-  // So only the first repetition has to find/calculate it,
-  // the other repetitions will just use that precomputed iteration count.
-
-  struct IterationResults {
-    internal::ThreadManager::Result results;
-    size_t iters;
-    double seconds;
-  };
-  IterationResults DoNIterations() {
-    VLOG(2) << "Running " << b.name << " for " << iters << "\n";
-
-    std::unique_ptr<internal::ThreadManager> manager;
-    manager.reset(new internal::ThreadManager(b.threads));
-
-    // Run all but one thread in separate threads
-    for (std::size_t ti = 0; ti < pool.size(); ++ti) {
-      pool[ti] = std::thread(&RunInThread, &b, iters, static_cast<int>(ti + 1),
-                             manager.get());
-    }
-    // And run one thread here directly.
-    // (If we were asked to run just one thread, we don't create new threads.)
-    // Yes, we need to do this here *after* we start the separate threads.
-    RunInThread(&b, iters, 0, manager.get());
-
-    // The main thread has finished. Now let's wait for the other threads.
-    manager->WaitForAllThreads();
-    for (std::thread& thread : pool) thread.join();
-
-    IterationResults i;
-    // Acquire the measurements/counters from the manager, UNDER THE LOCK!
-    {
-      MutexLock l(manager->GetBenchmarkMutex());
-      i.results = manager->results;
-    }
-
-    // And get rid of the manager.
-    manager.reset();
-
-    // Adjust real/manual time stats since they were reported per thread.
-    i.results.real_time_used /= b.threads;
-    i.results.manual_time_used /= b.threads;
-
-    VLOG(2) << "Ran in " << i.results.cpu_time_used << "/"
-            << i.results.real_time_used << "\n";
-
-    // So for how long were we running?
-    i.iters = iters;
-    // Base decisions off of real time if requested by this benchmark.
-    i.seconds = i.results.cpu_time_used;
-    if (b.use_manual_time) {
-      i.seconds = i.results.manual_time_used;
-    } else if (b.use_real_time) {
-      i.seconds = i.results.real_time_used;
-    }
-
-    return i;
-  }
-
-  size_t PredictNumItersNeeded(const IterationResults& i) const {
-    // See how much iterations should be increased by.
-    // Note: Avoid division by zero with max(seconds, 1ns).
-    double multiplier = min_time * 1.4 / std::max(i.seconds, 1e-9);
-    // If our last run was at least 10% of FLAGS_benchmark_min_time then we
-    // use the multiplier directly.
-    // Otherwise we use at most 10 times expansion.
-    // NOTE: When the last run was at least 10% of the min time the max
-    // expansion should be 14x.
-    bool is_significant = (i.seconds / min_time) > 0.1;
-    multiplier = is_significant ? multiplier : std::min(10.0, multiplier);
-    if (multiplier <= 1.0) multiplier = 2.0;
-
-    // So what seems to be the sufficiently-large iteration count? Round up.
-    const size_t max_next_iters =
-        0.5 + std::max(multiplier * i.iters, i.iters + 1.0);
-    // But we do have *some* sanity limits though..
-    const size_t next_iters = std::min(max_next_iters, kMaxIterations);
-
-    VLOG(3) << "Next iters: " << next_iters << ", " << multiplier << "\n";
-    return next_iters;  // round up before conversion to integer.
-  }
-
-  bool ShouldReportIterationResults(const IterationResults& i) const {
-    // Determine if this run should be reported;
-    // Either it has run for a sufficient amount of time
-    // or because an error was reported.
-    return i.results.has_error_ ||
-           i.iters >= kMaxIterations ||  // Too many iterations already.
-           i.seconds >= min_time ||      // The elapsed time is large enough.
-           // CPU time is specified but the elapsed real time greatly exceeds
-           // the minimum time.
-           // Note that user provided timers are except from this sanity check.
-           ((i.results.real_time_used >= 5 * min_time) && !b.use_manual_time);
-  }
-
-  void DoOneRepetition(bool is_the_first_repetition) {
-    IterationResults i;
-
-    // We *may* be gradually increasing the length (iteration count)
-    // of the benchmark until we decide the results are significant.
-    // And once we do, we report those last results and exit.
-    // Please do note that the if there are repetitions, the iteration count
-    // is *only* calculated for the *first* repetition, and other repetitions
-    // simply use that precomputed iteration count.
-    for (;;) {
-      i = DoNIterations();
-
-      // Do we consider the results to be significant?
-      // If we are doing repetitions, and the first repetition was already done,
-      // it has calculated the correct iteration time, so we have run that very
-      // iteration count just now. No need to calculate anything. Just report.
-      // Else, the normal rules apply.
-      const bool results_are_significant = !is_the_first_repetition ||
-                                           has_explicit_iteration_count ||
-                                           ShouldReportIterationResults(i);
-
-      if (results_are_significant) break;  // Good, let's report them!
-
-      // Nope, bad iteration. Let's re-estimate the hopefully-sufficient
-      // iteration count, and run the benchmark again...
-
-      iters = PredictNumItersNeeded(i);
-      assert(iters > i.iters &&
-             "if we did more iterations than we want to do the next time, "
-             "then we should have accepted the current iteration run.");
-    }
-
-    // Oh, one last thing, we need to also produce the 'memory measurements'..
-    MemoryManager::Result memory_result;
-    size_t memory_iterations = 0;
-    if (memory_manager != nullptr) {
-      // Only run a few iterations to reduce the impact of one-time
-      // allocations in benchmarks that are not properly managed.
-      memory_iterations = std::min<size_t>(16, iters);
-      memory_manager->Start();
-      std::unique_ptr<internal::ThreadManager> manager;
-      manager.reset(new internal::ThreadManager(1));
-      RunInThread(&b, memory_iterations, 0, manager.get());
-      manager->WaitForAllThreads();
-      manager.reset();
-
-      memory_manager->Stop(&memory_result);
-    }
-
-    // Ok, now actualy report.
-    BenchmarkReporter::Run report = CreateRunReport(
-        b, i.results, memory_iterations, memory_result, i.seconds);
-
-    if (!report.error_occurred && b.complexity != oNone)
-      complexity_reports.push_back(report);
-
-    run_results.non_aggregates.push_back(report);
-  }
-};
-
-}  // end namespace
-
-RunResults RunBenchmark(
-    const benchmark::internal::BenchmarkInstance& b,
-    std::vector<BenchmarkReporter::Run>* complexity_reports) {
-  internal::BenchmarkRunner r(b, complexity_reports);
-  return r.get_results();
-}
-
-}  // end namespace internal
-
-}  // end namespace benchmark
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/src/benchmark_runner.h b/gnu/llvm/libcxx/utils/google-benchmark/src/benchmark_runner.h
deleted file mode 100644
index 96e8282a11a..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/src/benchmark_runner.h
+++ /dev/null
@@ -1,51 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef BENCHMARK_RUNNER_H_
-#define BENCHMARK_RUNNER_H_
-
-#include "benchmark_api_internal.h"
-#include "internal_macros.h"
-
-DECLARE_double(benchmark_min_time);
-
-DECLARE_int32(benchmark_repetitions);
-
-DECLARE_bool(benchmark_report_aggregates_only);
-
-DECLARE_bool(benchmark_display_aggregates_only);
-
-namespace benchmark {
-
-namespace internal {
-
-extern MemoryManager* memory_manager;
-
-struct RunResults {
-  std::vector<BenchmarkReporter::Run> non_aggregates;
-  std::vector<BenchmarkReporter::Run> aggregates_only;
-
-  bool display_report_aggregates_only = false;
-  bool file_report_aggregates_only = false;
-};
-
-RunResults RunBenchmark(
-    const benchmark::internal::BenchmarkInstance& b,
-    std::vector<BenchmarkReporter::Run>* complexity_reports);
-
-}  // namespace internal
-
-}  // end namespace benchmark
-
-#endif  // BENCHMARK_RUNNER_H_
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/src/check.h b/gnu/llvm/libcxx/utils/google-benchmark/src/check.h
deleted file mode 100644
index f5f8253f804..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/src/check.h
+++ /dev/null
@@ -1,82 +0,0 @@
-#ifndef CHECK_H_
-#define CHECK_H_
-
-#include <cmath>
-#include <cstdlib>
-#include <ostream>
-
-#include "internal_macros.h"
-#include "log.h"
-
-namespace benchmark {
-namespace internal {
-
-typedef void(AbortHandlerT)();
-
-inline AbortHandlerT*& GetAbortHandler() {
-  static AbortHandlerT* handler = &std::abort;
-  return handler;
-}
-
-BENCHMARK_NORETURN inline void CallAbortHandler() {
-  GetAbortHandler()();
-  std::abort();  // fallback to enforce noreturn
-}
-
-// CheckHandler is the class constructed by failing CHECK macros. CheckHandler
-// will log information about the failures and abort when it is destructed.
-class CheckHandler {
- public:
-  CheckHandler(const char* check, const char* file, const char* func, int line)
-      : log_(GetErrorLogInstance()) {
-    log_ << file << ":" << line << ": " << func << ": Check `" << check
-         << "' failed. ";
-  }
-
-  LogType& GetLog() { return log_; }
-
-  BENCHMARK_NORETURN ~CheckHandler() BENCHMARK_NOEXCEPT_OP(false) {
-    log_ << std::endl;
-    CallAbortHandler();
-  }
-
-  CheckHandler& operator=(const CheckHandler&) = delete;
-  CheckHandler(const CheckHandler&) = delete;
-  CheckHandler() = delete;
-
- private:
-  LogType& log_;
-};
-
-}  // end namespace internal
-}  // end namespace benchmark
-
-// The CHECK macro returns a std::ostream object that can have extra information
-// written to it.
-#ifndef NDEBUG
-#define CHECK(b)                                                             \
-  (b ? ::benchmark::internal::GetNullLogInstance()                           \
-     : ::benchmark::internal::CheckHandler(#b, __FILE__, __func__, __LINE__) \
-           .GetLog())
-#else
-#define CHECK(b) ::benchmark::internal::GetNullLogInstance()
-#endif
-
-// clang-format off
-// preserve whitespacing between operators for alignment
-#define CHECK_EQ(a, b) CHECK((a) == (b))
-#define CHECK_NE(a, b) CHECK((a) != (b))
-#define CHECK_GE(a, b) CHECK((a) >= (b))
-#define CHECK_LE(a, b) CHECK((a) <= (b))
-#define CHECK_GT(a, b) CHECK((a) > (b))
-#define CHECK_LT(a, b) CHECK((a) < (b))
-
-#define CHECK_FLOAT_EQ(a, b, eps) CHECK(std::fabs((a) - (b)) <  (eps))
-#define CHECK_FLOAT_NE(a, b, eps) CHECK(std::fabs((a) - (b)) >= (eps))
-#define CHECK_FLOAT_GE(a, b, eps) CHECK((a) - (b) > -(eps))
-#define CHECK_FLOAT_LE(a, b, eps) CHECK((b) - (a) > -(eps))
-#define CHECK_FLOAT_GT(a, b, eps) CHECK((a) - (b) >  (eps))
-#define CHECK_FLOAT_LT(a, b, eps) CHECK((b) - (a) >  (eps))
-//clang-format on
-
-#endif  // CHECK_H_
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/src/colorprint.cc b/gnu/llvm/libcxx/utils/google-benchmark/src/colorprint.cc
deleted file mode 100644
index fff6a98818b..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/src/colorprint.cc
+++ /dev/null
@@ -1,188 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "colorprint.h"
-
-#include <cstdarg>
-#include <cstdio>
-#include <cstdlib>
-#include <cstring>
-#include <memory>
-#include <string>
-
-#include "check.h"
-#include "internal_macros.h"
-
-#ifdef BENCHMARK_OS_WINDOWS
-#include <windows.h>
-#include <io.h>
-#else
-#include <unistd.h>
-#endif  // BENCHMARK_OS_WINDOWS
-
-namespace benchmark {
-namespace {
-#ifdef BENCHMARK_OS_WINDOWS
-typedef WORD PlatformColorCode;
-#else
-typedef const char* PlatformColorCode;
-#endif
-
-PlatformColorCode GetPlatformColorCode(LogColor color) {
-#ifdef BENCHMARK_OS_WINDOWS
-  switch (color) {
-    case COLOR_RED:
-      return FOREGROUND_RED;
-    case COLOR_GREEN:
-      return FOREGROUND_GREEN;
-    case COLOR_YELLOW:
-      return FOREGROUND_RED | FOREGROUND_GREEN;
-    case COLOR_BLUE:
-      return FOREGROUND_BLUE;
-    case COLOR_MAGENTA:
-      return FOREGROUND_BLUE | FOREGROUND_RED;
-    case COLOR_CYAN:
-      return FOREGROUND_BLUE | FOREGROUND_GREEN;
-    case COLOR_WHITE:  // fall through to default
-    default:
-      return 0;
-  }
-#else
-  switch (color) {
-    case COLOR_RED:
-      return "1";
-    case COLOR_GREEN:
-      return "2";
-    case COLOR_YELLOW:
-      return "3";
-    case COLOR_BLUE:
-      return "4";
-    case COLOR_MAGENTA:
-      return "5";
-    case COLOR_CYAN:
-      return "6";
-    case COLOR_WHITE:
-      return "7";
-    default:
-      return nullptr;
-  };
-#endif
-}
-
-}  // end namespace
-
-std::string FormatString(const char* msg, va_list args) {
-  // we might need a second shot at this, so pre-emptivly make a copy
-  va_list args_cp;
-  va_copy(args_cp, args);
-
-  std::size_t size = 256;
-  char local_buff[256];
-  auto ret = vsnprintf(local_buff, size, msg, args_cp);
-
-  va_end(args_cp);
-
-  // currently there is no error handling for failure, so this is hack.
-  CHECK(ret >= 0);
-
-  if (ret == 0)  // handle empty expansion
-    return {};
-  else if (static_cast<size_t>(ret) < size)
-    return local_buff;
-  else {
-    // we did not provide a long enough buffer on our first attempt.
-    size = (size_t)ret + 1;  // + 1 for the null byte
-    std::unique_ptr<char[]> buff(new char[size]);
-    ret = vsnprintf(buff.get(), size, msg, args);
-    CHECK(ret > 0 && ((size_t)ret) < size);
-    return buff.get();
-  }
-}
-
-std::string FormatString(const char* msg, ...) {
-  va_list args;
-  va_start(args, msg);
-  auto tmp = FormatString(msg, args);
-  va_end(args);
-  return tmp;
-}
-
-void ColorPrintf(std::ostream& out, LogColor color, const char* fmt, ...) {
-  va_list args;
-  va_start(args, fmt);
-  ColorPrintf(out, color, fmt, args);
-  va_end(args);
-}
-
-void ColorPrintf(std::ostream& out, LogColor color, const char* fmt,
-                 va_list args) {
-#ifdef BENCHMARK_OS_WINDOWS
-  ((void)out);  // suppress unused warning
-
-  const HANDLE stdout_handle = GetStdHandle(STD_OUTPUT_HANDLE);
-
-  // Gets the current text color.
-  CONSOLE_SCREEN_BUFFER_INFO buffer_info;
-  GetConsoleScreenBufferInfo(stdout_handle, &buffer_info);
-  const WORD old_color_attrs = buffer_info.wAttributes;
-
-  // We need to flush the stream buffers into the console before each
-  // SetConsoleTextAttribute call lest it affect the text that is already
-  // printed but has not yet reached the console.
-  fflush(stdout);
-  SetConsoleTextAttribute(stdout_handle,
-                          GetPlatformColorCode(color) | FOREGROUND_INTENSITY);
-  vprintf(fmt, args);
-
-  fflush(stdout);
-  // Restores the text color.
-  SetConsoleTextAttribute(stdout_handle, old_color_attrs);
-#else
-  const char* color_code = GetPlatformColorCode(color);
-  if (color_code) out << FormatString("\033[0;3%sm", color_code);
-  out << FormatString(fmt, args) << "\033[m";
-#endif
-}
-
-bool IsColorTerminal() {
-#if BENCHMARK_OS_WINDOWS
-  // On Windows the TERM variable is usually not set, but the
-  // console there does support colors.
-  return 0 != _isatty(_fileno(stdout));
-#else
-  // On non-Windows platforms, we rely on the TERM variable. This list of
-  // supported TERM values is copied from Google Test:
-  // <https://github.com/google/googletest/blob/master/googletest/src/gtest.cc#L2925>.
-  const char* const SUPPORTED_TERM_VALUES[] = {
-      "xterm",         "xterm-color",     "xterm-256color",
-      "screen",        "screen-256color", "tmux",
-      "tmux-256color", "rxvt-unicode",    "rxvt-unicode-256color",
-      "linux",         "cygwin",
-  };
-
-  const char* const term = getenv("TERM");
-
-  bool term_supports_color = false;
-  for (const char* candidate : SUPPORTED_TERM_VALUES) {
-    if (term && 0 == strcmp(term, candidate)) {
-      term_supports_color = true;
-      break;
-    }
-  }
-
-  return 0 != isatty(fileno(stdout)) && term_supports_color;
-#endif  // BENCHMARK_OS_WINDOWS
-}
-
-}  // end namespace benchmark
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/src/colorprint.h b/gnu/llvm/libcxx/utils/google-benchmark/src/colorprint.h
deleted file mode 100644
index 9f6fab9b342..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/src/colorprint.h
+++ /dev/null
@@ -1,33 +0,0 @@
-#ifndef BENCHMARK_COLORPRINT_H_
-#define BENCHMARK_COLORPRINT_H_
-
-#include <cstdarg>
-#include <iostream>
-#include <string>
-
-namespace benchmark {
-enum LogColor {
-  COLOR_DEFAULT,
-  COLOR_RED,
-  COLOR_GREEN,
-  COLOR_YELLOW,
-  COLOR_BLUE,
-  COLOR_MAGENTA,
-  COLOR_CYAN,
-  COLOR_WHITE
-};
-
-std::string FormatString(const char* msg, va_list args);
-std::string FormatString(const char* msg, ...);
-
-void ColorPrintf(std::ostream& out, LogColor color, const char* fmt,
-                 va_list args);
-void ColorPrintf(std::ostream& out, LogColor color, const char* fmt, ...);
-
-// Returns true if stdout appears to be a terminal that supports colored
-// output, false otherwise.
-bool IsColorTerminal();
-
-}  // end namespace benchmark
-
-#endif  // BENCHMARK_COLORPRINT_H_
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/src/commandlineflags.cc b/gnu/llvm/libcxx/utils/google-benchmark/src/commandlineflags.cc
deleted file mode 100644
index 734e88bbec6..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/src/commandlineflags.cc
+++ /dev/null
@@ -1,218 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "commandlineflags.h"
-
-#include <cctype>
-#include <cstdlib>
-#include <cstring>
-#include <iostream>
-#include <limits>
-
-namespace benchmark {
-// Parses 'str' for a 32-bit signed integer.  If successful, writes
-// the result to *value and returns true; otherwise leaves *value
-// unchanged and returns false.
-bool ParseInt32(const std::string& src_text, const char* str, int32_t* value) {
-  // Parses the environment variable as a decimal integer.
-  char* end = nullptr;
-  const long long_value = strtol(str, &end, 10);  // NOLINT
-
-  // Has strtol() consumed all characters in the string?
-  if (*end != '\0') {
-    // No - an invalid character was encountered.
-    std::cerr << src_text << " is expected to be a 32-bit integer, "
-              << "but actually has value \"" << str << "\".\n";
-    return false;
-  }
-
-  // Is the parsed value in the range of an Int32?
-  const int32_t result = static_cast<int32_t>(long_value);
-  if (long_value == std::numeric_limits<long>::max() ||
-      long_value == std::numeric_limits<long>::min() ||
-      // The parsed value overflows as a long.  (strtol() returns
-      // LONG_MAX or LONG_MIN when the input overflows.)
-      result != long_value
-      // The parsed value overflows as an Int32.
-  ) {
-    std::cerr << src_text << " is expected to be a 32-bit integer, "
-              << "but actually has value \"" << str << "\", "
-              << "which overflows.\n";
-    return false;
-  }
-
-  *value = result;
-  return true;
-}
-
-// Parses 'str' for a double.  If successful, writes the result to *value and
-// returns true; otherwise leaves *value unchanged and returns false.
-bool ParseDouble(const std::string& src_text, const char* str, double* value) {
-  // Parses the environment variable as a decimal integer.
-  char* end = nullptr;
-  const double double_value = strtod(str, &end);  // NOLINT
-
-  // Has strtol() consumed all characters in the string?
-  if (*end != '\0') {
-    // No - an invalid character was encountered.
-    std::cerr << src_text << " is expected to be a double, "
-              << "but actually has value \"" << str << "\".\n";
-    return false;
-  }
-
-  *value = double_value;
-  return true;
-}
-
-// Returns the name of the environment variable corresponding to the
-// given flag.  For example, FlagToEnvVar("foo") will return
-// "BENCHMARK_FOO" in the open-source version.
-static std::string FlagToEnvVar(const char* flag) {
-  const std::string flag_str(flag);
-
-  std::string env_var;
-  for (size_t i = 0; i != flag_str.length(); ++i)
-    env_var += static_cast<char>(::toupper(flag_str.c_str()[i]));
-
-  return "BENCHMARK_" + env_var;
-}
-
-// Reads and returns the Boolean environment variable corresponding to
-// the given flag; if it's not set, returns default_value.
-//
-// The value is considered true iff it's not "0".
-bool BoolFromEnv(const char* flag, bool default_value) {
-  const std::string env_var = FlagToEnvVar(flag);
-  const char* const string_value = getenv(env_var.c_str());
-  return string_value == nullptr ? default_value
-                                 : strcmp(string_value, "0") != 0;
-}
-
-// Reads and returns a 32-bit integer stored in the environment
-// variable corresponding to the given flag; if it isn't set or
-// doesn't represent a valid 32-bit integer, returns default_value.
-int32_t Int32FromEnv(const char* flag, int32_t default_value) {
-  const std::string env_var = FlagToEnvVar(flag);
-  const char* const string_value = getenv(env_var.c_str());
-  if (string_value == nullptr) {
-    // The environment variable is not set.
-    return default_value;
-  }
-
-  int32_t result = default_value;
-  if (!ParseInt32(std::string("Environment variable ") + env_var, string_value,
-                  &result)) {
-    std::cout << "The default value " << default_value << " is used.\n";
-    return default_value;
-  }
-
-  return result;
-}
-
-// Reads and returns the string environment variable corresponding to
-// the given flag; if it's not set, returns default_value.
-const char* StringFromEnv(const char* flag, const char* default_value) {
-  const std::string env_var = FlagToEnvVar(flag);
-  const char* const value = getenv(env_var.c_str());
-  return value == nullptr ? default_value : value;
-}
-
-// Parses a string as a command line flag.  The string should have
-// the format "--flag=value".  When def_optional is true, the "=value"
-// part can be omitted.
-//
-// Returns the value of the flag, or nullptr if the parsing failed.
-const char* ParseFlagValue(const char* str, const char* flag,
-                           bool def_optional) {
-  // str and flag must not be nullptr.
-  if (str == nullptr || flag == nullptr) return nullptr;
-
-  // The flag must start with "--".
-  const std::string flag_str = std::string("--") + std::string(flag);
-  const size_t flag_len = flag_str.length();
-  if (strncmp(str, flag_str.c_str(), flag_len) != 0) return nullptr;
-
-  // Skips the flag name.
-  const char* flag_end = str + flag_len;
-
-  // When def_optional is true, it's OK to not have a "=value" part.
-  if (def_optional && (flag_end[0] == '\0')) return flag_end;
-
-  // If def_optional is true and there are more characters after the
-  // flag name, or if def_optional is false, there must be a '=' after
-  // the flag name.
-  if (flag_end[0] != '=') return nullptr;
-
-  // Returns the string after "=".
-  return flag_end + 1;
-}
-
-bool ParseBoolFlag(const char* str, const char* flag, bool* value) {
-  // Gets the value of the flag as a string.
-  const char* const value_str = ParseFlagValue(str, flag, true);
-
-  // Aborts if the parsing failed.
-  if (value_str == nullptr) return false;
-
-  // Converts the string value to a bool.
-  *value = IsTruthyFlagValue(value_str);
-  return true;
-}
-
-bool ParseInt32Flag(const char* str, const char* flag, int32_t* value) {
-  // Gets the value of the flag as a string.
-  const char* const value_str = ParseFlagValue(str, flag, false);
-
-  // Aborts if the parsing failed.
-  if (value_str == nullptr) return false;
-
-  // Sets *value to the value of the flag.
-  return ParseInt32(std::string("The value of flag --") + flag, value_str,
-                    value);
-}
-
-bool ParseDoubleFlag(const char* str, const char* flag, double* value) {
-  // Gets the value of the flag as a string.
-  const char* const value_str = ParseFlagValue(str, flag, false);
-
-  // Aborts if the parsing failed.
-  if (value_str == nullptr) return false;
-
-  // Sets *value to the value of the flag.
-  return ParseDouble(std::string("The value of flag --") + flag, value_str,
-                     value);
-}
-
-bool ParseStringFlag(const char* str, const char* flag, std::string* value) {
-  // Gets the value of the flag as a string.
-  const char* const value_str = ParseFlagValue(str, flag, false);
-
-  // Aborts if the parsing failed.
-  if (value_str == nullptr) return false;
-
-  *value = value_str;
-  return true;
-}
-
-bool IsFlag(const char* str, const char* flag) {
-  return (ParseFlagValue(str, flag, true) != nullptr);
-}
-
-bool IsTruthyFlagValue(const std::string& value) {
-  if (value.empty()) return true;
-  char ch = value[0];
-  return isalnum(ch) &&
-         !(ch == '0' || ch == 'f' || ch == 'F' || ch == 'n' || ch == 'N');
-}
-}  // end namespace benchmark
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/src/commandlineflags.h b/gnu/llvm/libcxx/utils/google-benchmark/src/commandlineflags.h
deleted file mode 100644
index 945c9a9fc4a..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/src/commandlineflags.h
+++ /dev/null
@@ -1,79 +0,0 @@
-#ifndef BENCHMARK_COMMANDLINEFLAGS_H_
-#define BENCHMARK_COMMANDLINEFLAGS_H_
-
-#include <cstdint>
-#include <string>
-
-// Macro for referencing flags.
-#define FLAG(name) FLAGS_##name
-
-// Macros for declaring flags.
-#define DECLARE_bool(name) extern bool FLAG(name)
-#define DECLARE_int32(name) extern int32_t FLAG(name)
-#define DECLARE_int64(name) extern int64_t FLAG(name)
-#define DECLARE_double(name) extern double FLAG(name)
-#define DECLARE_string(name) extern std::string FLAG(name)
-
-// Macros for defining flags.
-#define DEFINE_bool(name, default_val, doc) bool FLAG(name) = (default_val)
-#define DEFINE_int32(name, default_val, doc) int32_t FLAG(name) = (default_val)
-#define DEFINE_int64(name, default_val, doc) int64_t FLAG(name) = (default_val)
-#define DEFINE_double(name, default_val, doc) double FLAG(name) = (default_val)
-#define DEFINE_string(name, default_val, doc) \
-  std::string FLAG(name) = (default_val)
-
-namespace benchmark {
-// Parses 'str' for a 32-bit signed integer.  If successful, writes the result
-// to *value and returns true; otherwise leaves *value unchanged and returns
-// false.
-bool ParseInt32(const std::string& src_text, const char* str, int32_t* value);
-
-// Parses a bool/Int32/string from the environment variable
-// corresponding to the given Google Test flag.
-bool BoolFromEnv(const char* flag, bool default_val);
-int32_t Int32FromEnv(const char* flag, int32_t default_val);
-double DoubleFromEnv(const char* flag, double default_val);
-const char* StringFromEnv(const char* flag, const char* default_val);
-
-// Parses a string for a bool flag, in the form of either
-// "--flag=value" or "--flag".
-//
-// In the former case, the value is taken as true if it passes IsTruthyValue().
-//
-// In the latter case, the value is taken as true.
-//
-// On success, stores the value of the flag in *value, and returns
-// true.  On failure, returns false without changing *value.
-bool ParseBoolFlag(const char* str, const char* flag, bool* value);
-
-// Parses a string for an Int32 flag, in the form of
-// "--flag=value".
-//
-// On success, stores the value of the flag in *value, and returns
-// true.  On failure, returns false without changing *value.
-bool ParseInt32Flag(const char* str, const char* flag, int32_t* value);
-
-// Parses a string for a Double flag, in the form of
-// "--flag=value".
-//
-// On success, stores the value of the flag in *value, and returns
-// true.  On failure, returns false without changing *value.
-bool ParseDoubleFlag(const char* str, const char* flag, double* value);
-
-// Parses a string for a string flag, in the form of
-// "--flag=value".
-//
-// On success, stores the value of the flag in *value, and returns
-// true.  On failure, returns false without changing *value.
-bool ParseStringFlag(const char* str, const char* flag, std::string* value);
-
-// Returns true if the string matches the flag.
-bool IsFlag(const char* str, const char* flag);
-
-// Returns true unless value starts with one of: '0', 'f', 'F', 'n' or 'N', or
-// some non-alphanumeric character. As a special case, also returns true if
-// value is the empty string.
-bool IsTruthyFlagValue(const std::string& value);
-}  // end namespace benchmark
-
-#endif  // BENCHMARK_COMMANDLINEFLAGS_H_
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/src/complexity.cc b/gnu/llvm/libcxx/utils/google-benchmark/src/complexity.cc
deleted file mode 100644
index 6ef17660c95..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/src/complexity.cc
+++ /dev/null
@@ -1,228 +0,0 @@
-// Copyright 2016 Ismael Jimenez Martinez. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// Source project : https://github.com/ismaelJimenez/cpp.leastsq
-// Adapted to be used with google benchmark
-
-#include "benchmark/benchmark.h"
-
-#include <algorithm>
-#include <cmath>
-#include "check.h"
-#include "complexity.h"
-
-namespace benchmark {
-
-// Internal function to calculate the different scalability forms
-BigOFunc* FittingCurve(BigO complexity) {
-  static const double kLog2E = 1.44269504088896340736;
-  switch (complexity) {
-    case oN:
-      return [](int64_t n) -> double { return static_cast<double>(n); };
-    case oNSquared:
-      return [](int64_t n) -> double { return std::pow(n, 2); };
-    case oNCubed:
-      return [](int64_t n) -> double { return std::pow(n, 3); };
-    case oLogN:
-      /* Note: can't use log2 because Android's GNU STL lacks it */
-      return [](int64_t n) { return kLog2E * log(static_cast<double>(n)); };
-    case oNLogN:
-      /* Note: can't use log2 because Android's GNU STL lacks it */
-      return [](int64_t n) { return kLog2E * n * log(static_cast<double>(n)); };
-    case o1:
-    default:
-      return [](int64_t) { return 1.0; };
-  }
-}
-
-// Function to return an string for the calculated complexity
-std::string GetBigOString(BigO complexity) {
-  switch (complexity) {
-    case oN:
-      return "N";
-    case oNSquared:
-      return "N^2";
-    case oNCubed:
-      return "N^3";
-    case oLogN:
-      return "lgN";
-    case oNLogN:
-      return "NlgN";
-    case o1:
-      return "(1)";
-    default:
-      return "f(N)";
-  }
-}
-
-// Find the coefficient for the high-order term in the running time, by
-// minimizing the sum of squares of relative error, for the fitting curve
-// given by the lambda expression.
-//   - n             : Vector containing the size of the benchmark tests.
-//   - time          : Vector containing the times for the benchmark tests.
-//   - fitting_curve : lambda expression (e.g. [](int64_t n) {return n; };).
-
-// For a deeper explanation on the algorithm logic, please refer to
-// https://en.wikipedia.org/wiki/Least_squares#Least_squares,_regression_analysis_and_statistics
-
-LeastSq MinimalLeastSq(const std::vector<int64_t>& n,
-                       const std::vector<double>& time,
-                       BigOFunc* fitting_curve) {
-  double sigma_gn = 0.0;
-  double sigma_gn_squared = 0.0;
-  double sigma_time = 0.0;
-  double sigma_time_gn = 0.0;
-
-  // Calculate least square fitting parameter
-  for (size_t i = 0; i < n.size(); ++i) {
-    double gn_i = fitting_curve(n[i]);
-    sigma_gn += gn_i;
-    sigma_gn_squared += gn_i * gn_i;
-    sigma_time += time[i];
-    sigma_time_gn += time[i] * gn_i;
-  }
-
-  LeastSq result;
-  result.complexity = oLambda;
-
-  // Calculate complexity.
-  result.coef = sigma_time_gn / sigma_gn_squared;
-
-  // Calculate RMS
-  double rms = 0.0;
-  for (size_t i = 0; i < n.size(); ++i) {
-    double fit = result.coef * fitting_curve(n[i]);
-    rms += pow((time[i] - fit), 2);
-  }
-
-  // Normalized RMS by the mean of the observed values
-  double mean = sigma_time / n.size();
-  result.rms = sqrt(rms / n.size()) / mean;
-
-  return result;
-}
-
-// Find the coefficient for the high-order term in the running time, by
-// minimizing the sum of squares of relative error.
-//   - n          : Vector containing the size of the benchmark tests.
-//   - time       : Vector containing the times for the benchmark tests.
-//   - complexity : If different than oAuto, the fitting curve will stick to
-//                  this one. If it is oAuto, it will be calculated the best
-//                  fitting curve.
-LeastSq MinimalLeastSq(const std::vector<int64_t>& n,
-                       const std::vector<double>& time, const BigO complexity) {
-  CHECK_EQ(n.size(), time.size());
-  CHECK_GE(n.size(), 2);  // Do not compute fitting curve is less than two
-                          // benchmark runs are given
-  CHECK_NE(complexity, oNone);
-
-  LeastSq best_fit;
-
-  if (complexity == oAuto) {
-    std::vector<BigO> fit_curves = {oLogN, oN, oNLogN, oNSquared, oNCubed};
-
-    // Take o1 as default best fitting curve
-    best_fit = MinimalLeastSq(n, time, FittingCurve(o1));
-    best_fit.complexity = o1;
-
-    // Compute all possible fitting curves and stick to the best one
-    for (const auto& fit : fit_curves) {
-      LeastSq current_fit = MinimalLeastSq(n, time, FittingCurve(fit));
-      if (current_fit.rms < best_fit.rms) {
-        best_fit = current_fit;
-        best_fit.complexity = fit;
-      }
-    }
-  } else {
-    best_fit = MinimalLeastSq(n, time, FittingCurve(complexity));
-    best_fit.complexity = complexity;
-  }
-
-  return best_fit;
-}
-
-std::vector<BenchmarkReporter::Run> ComputeBigO(
-    const std::vector<BenchmarkReporter::Run>& reports) {
-  typedef BenchmarkReporter::Run Run;
-  std::vector<Run> results;
-
-  if (reports.size() < 2) return results;
-
-  // Accumulators.
-  std::vector<int64_t> n;
-  std::vector<double> real_time;
-  std::vector<double> cpu_time;
-
-  // Populate the accumulators.
-  for (const Run& run : reports) {
-    CHECK_GT(run.complexity_n, 0) << "Did you forget to call SetComplexityN?";
-    n.push_back(run.complexity_n);
-    real_time.push_back(run.real_accumulated_time / run.iterations);
-    cpu_time.push_back(run.cpu_accumulated_time / run.iterations);
-  }
-
-  LeastSq result_cpu;
-  LeastSq result_real;
-
-  if (reports[0].complexity == oLambda) {
-    result_cpu = MinimalLeastSq(n, cpu_time, reports[0].complexity_lambda);
-    result_real = MinimalLeastSq(n, real_time, reports[0].complexity_lambda);
-  } else {
-    result_cpu = MinimalLeastSq(n, cpu_time, reports[0].complexity);
-    result_real = MinimalLeastSq(n, real_time, result_cpu.complexity);
-  }
-
-  std::string run_name = reports[0].benchmark_name().substr(
-      0, reports[0].benchmark_name().find('/'));
-
-  // Get the data from the accumulator to BenchmarkReporter::Run's.
-  Run big_o;
-  big_o.run_name = run_name;
-  big_o.run_type = BenchmarkReporter::Run::RT_Aggregate;
-  big_o.aggregate_name = "BigO";
-  big_o.iterations = 0;
-  big_o.real_accumulated_time = result_real.coef;
-  big_o.cpu_accumulated_time = result_cpu.coef;
-  big_o.report_big_o = true;
-  big_o.complexity = result_cpu.complexity;
-
-  // All the time results are reported after being multiplied by the
-  // time unit multiplier. But since RMS is a relative quantity it
-  // should not be multiplied at all. So, here, we _divide_ it by the
-  // multiplier so that when it is multiplied later the result is the
-  // correct one.
-  double multiplier = GetTimeUnitMultiplier(reports[0].time_unit);
-
-  // Only add label to mean/stddev if it is same for all runs
-  Run rms;
-  rms.run_name = run_name;
-  big_o.report_label = reports[0].report_label;
-  rms.run_type = BenchmarkReporter::Run::RT_Aggregate;
-  rms.aggregate_name = "RMS";
-  rms.report_label = big_o.report_label;
-  rms.iterations = 0;
-  rms.real_accumulated_time = result_real.rms / multiplier;
-  rms.cpu_accumulated_time = result_cpu.rms / multiplier;
-  rms.report_rms = true;
-  rms.complexity = result_cpu.complexity;
-  // don't forget to keep the time unit, or we won't be able to
-  // recover the correct value.
-  rms.time_unit = reports[0].time_unit;
-
-  results.push_back(big_o);
-  results.push_back(rms);
-  return results;
-}
-
-}  // end namespace benchmark
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/src/complexity.h b/gnu/llvm/libcxx/utils/google-benchmark/src/complexity.h
deleted file mode 100644
index df29b48d29b..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/src/complexity.h
+++ /dev/null
@@ -1,55 +0,0 @@
-// Copyright 2016 Ismael Jimenez Martinez. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// Source project : https://github.com/ismaelJimenez/cpp.leastsq
-// Adapted to be used with google benchmark
-
-#ifndef COMPLEXITY_H_
-#define COMPLEXITY_H_
-
-#include <string>
-#include <vector>
-
-#include "benchmark/benchmark.h"
-
-namespace benchmark {
-
-// Return a vector containing the bigO and RMS information for the specified
-// list of reports. If 'reports.size() < 2' an empty vector is returned.
-std::vector<BenchmarkReporter::Run> ComputeBigO(
-    const std::vector<BenchmarkReporter::Run>& reports);
-
-// This data structure will contain the result returned by MinimalLeastSq
-//   - coef        : Estimated coeficient for the high-order term as
-//                   interpolated from data.
-//   - rms         : Normalized Root Mean Squared Error.
-//   - complexity  : Scalability form (e.g. oN, oNLogN). In case a scalability
-//                   form has been provided to MinimalLeastSq this will return
-//                   the same value. In case BigO::oAuto has been selected, this
-//                   parameter will return the best fitting curve detected.
-
-struct LeastSq {
-  LeastSq() : coef(0.0), rms(0.0), complexity(oNone) {}
-
-  double coef;
-  double rms;
-  BigO complexity;
-};
-
-// Function to return an string for the calculated complexity
-std::string GetBigOString(BigO complexity);
-
-}  // end namespace benchmark
-
-#endif  // COMPLEXITY_H_
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/src/console_reporter.cc b/gnu/llvm/libcxx/utils/google-benchmark/src/console_reporter.cc
deleted file mode 100644
index ca364727cb4..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/src/console_reporter.cc
+++ /dev/null
@@ -1,180 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "benchmark/benchmark.h"
-#include "complexity.h"
-#include "counter.h"
-
-#include <algorithm>
-#include <cstdint>
-#include <cstdio>
-#include <iostream>
-#include <string>
-#include <tuple>
-#include <vector>
-
-#include "check.h"
-#include "colorprint.h"
-#include "commandlineflags.h"
-#include "internal_macros.h"
-#include "string_util.h"
-#include "timers.h"
-
-namespace benchmark {
-
-bool ConsoleReporter::ReportContext(const Context& context) {
-  name_field_width_ = context.name_field_width;
-  printed_header_ = false;
-  prev_counters_.clear();
-
-  PrintBasicContext(&GetErrorStream(), context);
-
-#ifdef BENCHMARK_OS_WINDOWS
-  if ((output_options_ & OO_Color) && &std::cout != &GetOutputStream()) {
-    GetErrorStream()
-        << "Color printing is only supported for stdout on windows."
-           " Disabling color printing\n";
-    output_options_ = static_cast< OutputOptions >(output_options_ & ~OO_Color);
-  }
-#endif
-
-  return true;
-}
-
-void ConsoleReporter::PrintHeader(const Run& run) {
-  std::string str = FormatString("%-*s %13s %15s %12s", static_cast<int>(name_field_width_),
-                                 "Benchmark", "Time", "CPU", "Iterations");
-  if(!run.counters.empty()) {
-    if(output_options_ & OO_Tabular) {
-      for(auto const& c : run.counters) {
-        str += FormatString(" %10s", c.first.c_str());
-      }
-    } else {
-      str += " UserCounters...";
-    }
-  }
-  str += "\n";
-  std::string line = std::string(str.length(), '-');
-  GetOutputStream() << line << "\n" << str << line << "\n";
-}
-
-void ConsoleReporter::ReportRuns(const std::vector<Run>& reports) {
-  for (const auto& run : reports) {
-    // print the header:
-    // --- if none was printed yet
-    bool print_header = !printed_header_;
-    // --- or if the format is tabular and this run
-    //     has different fields from the prev header
-    print_header |= (output_options_ & OO_Tabular) &&
-                    (!internal::SameNames(run.counters, prev_counters_));
-    if (print_header) {
-      printed_header_ = true;
-      prev_counters_ = run.counters;
-      PrintHeader(run);
-    }
-    // As an alternative to printing the headers like this, we could sort
-    // the benchmarks by header and then print. But this would require
-    // waiting for the full results before printing, or printing twice.
-    PrintRunData(run);
-  }
-}
-
-static void IgnoreColorPrint(std::ostream& out, LogColor, const char* fmt,
-                             ...) {
-  va_list args;
-  va_start(args, fmt);
-  out << FormatString(fmt, args);
-  va_end(args);
-}
-
-
-static std::string FormatTime(double time) {
-  // Align decimal places...
-  if (time < 1.0) {
-    return FormatString("%10.3f", time);
-  }
-  if (time < 10.0) {
-    return FormatString("%10.2f", time);
-  }
-  if (time < 100.0) {
-    return FormatString("%10.1f", time);
-  }
-  return FormatString("%10.0f", time);
-}
-
-void ConsoleReporter::PrintRunData(const Run& result) {
-  typedef void(PrinterFn)(std::ostream&, LogColor, const char*, ...);
-  auto& Out = GetOutputStream();
-  PrinterFn* printer = (output_options_ & OO_Color) ?
-                         (PrinterFn*)ColorPrintf : IgnoreColorPrint;
-  auto name_color =
-      (result.report_big_o || result.report_rms) ? COLOR_BLUE : COLOR_GREEN;
-  printer(Out, name_color, "%-*s ", name_field_width_,
-          result.benchmark_name().c_str());
-
-  if (result.error_occurred) {
-    printer(Out, COLOR_RED, "ERROR OCCURRED: \'%s\'",
-            result.error_message.c_str());
-    printer(Out, COLOR_DEFAULT, "\n");
-    return;
-  }
-
-  const double real_time = result.GetAdjustedRealTime();
-  const double cpu_time = result.GetAdjustedCPUTime();
-  const std::string real_time_str = FormatTime(real_time);
-  const std::string cpu_time_str = FormatTime(cpu_time);
-
-
-  if (result.report_big_o) {
-    std::string big_o = GetBigOString(result.complexity);
-    printer(Out, COLOR_YELLOW, "%10.2f %-4s %10.2f %-4s ", real_time, big_o.c_str(),
-            cpu_time, big_o.c_str());
-  } else if (result.report_rms) {
-    printer(Out, COLOR_YELLOW, "%10.0f %-4s %10.0f %-4s ", real_time * 100, "%",
-            cpu_time * 100, "%");
-  } else {
-    const char* timeLabel = GetTimeUnitString(result.time_unit);
-    printer(Out, COLOR_YELLOW, "%s %-4s %s %-4s ", real_time_str.c_str(), timeLabel,
-            cpu_time_str.c_str(), timeLabel);
-  }
-
-  if (!result.report_big_o && !result.report_rms) {
-    printer(Out, COLOR_CYAN, "%10lld", result.iterations);
-  }
-
-  for (auto& c : result.counters) {
-    const std::size_t cNameLen = std::max(std::string::size_type(10),
-                                          c.first.length());
-    auto const& s = HumanReadableNumber(c.second.value, c.second.oneK);
-    if (output_options_ & OO_Tabular) {
-      if (c.second.flags & Counter::kIsRate) {
-        printer(Out, COLOR_DEFAULT, " %*s/s", cNameLen - 2, s.c_str());
-      } else {
-        printer(Out, COLOR_DEFAULT, " %*s", cNameLen, s.c_str());
-      }
-    } else {
-      const char* unit = (c.second.flags & Counter::kIsRate) ? "/s" : "";
-      printer(Out, COLOR_DEFAULT, " %s=%s%s", c.first.c_str(), s.c_str(),
-              unit);
-    }
-  }
-
-  if (!result.report_label.empty()) {
-    printer(Out, COLOR_DEFAULT, " %s", result.report_label.c_str());
-  }
-
-  printer(Out, COLOR_DEFAULT, "\n");
-}
-
-}  // end namespace benchmark
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/src/counter.cc b/gnu/llvm/libcxx/utils/google-benchmark/src/counter.cc
deleted file mode 100644
index cb604e060b6..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/src/counter.cc
+++ /dev/null
@@ -1,75 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "counter.h"
-
-namespace benchmark {
-namespace internal {
-
-double Finish(Counter const& c, int64_t iterations, double cpu_time,
-              double num_threads) {
-  double v = c.value;
-  if (c.flags & Counter::kIsRate) {
-    v /= cpu_time;
-  }
-  if (c.flags & Counter::kAvgThreads) {
-    v /= num_threads;
-  }
-  if (c.flags & Counter::kIsIterationInvariant) {
-    v *= iterations;
-  }
-  if (c.flags & Counter::kAvgIterations) {
-    v /= iterations;
-  }
-  return v;
-}
-
-void Finish(UserCounters* l, int64_t iterations, double cpu_time, double num_threads) {
-  for (auto& c : *l) {
-    c.second.value = Finish(c.second, iterations, cpu_time, num_threads);
-  }
-}
-
-void Increment(UserCounters* l, UserCounters const& r) {
-  // add counters present in both or just in *l
-  for (auto& c : *l) {
-    auto it = r.find(c.first);
-    if (it != r.end()) {
-      c.second.value = c.second + it->second;
-    }
-  }
-  // add counters present in r, but not in *l
-  for (auto const& tc : r) {
-    auto it = l->find(tc.first);
-    if (it == l->end()) {
-      (*l)[tc.first] = tc.second;
-    }
-  }
-}
-
-bool SameNames(UserCounters const& l, UserCounters const& r) {
-  if (&l == &r) return true;
-  if (l.size() != r.size()) {
-    return false;
-  }
-  for (auto const& c : l) {
-    if (r.find(c.first) == r.end()) {
-      return false;
-    }
-  }
-  return true;
-}
-
-}  // end namespace internal
-}  // end namespace benchmark
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/src/counter.h b/gnu/llvm/libcxx/utils/google-benchmark/src/counter.h
deleted file mode 100644
index d884e50aa12..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/src/counter.h
+++ /dev/null
@@ -1,26 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "benchmark/benchmark.h"
-
-namespace benchmark {
-
-// these counter-related functions are hidden to reduce API surface.
-namespace internal {
-void Finish(UserCounters* l, int64_t iterations, double time, double num_threads);
-void Increment(UserCounters* l, UserCounters const& r);
-bool SameNames(UserCounters const& l, UserCounters const& r);
-}  // end namespace internal
-
-}  // end namespace benchmark
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/src/csv_reporter.cc b/gnu/llvm/libcxx/utils/google-benchmark/src/csv_reporter.cc
deleted file mode 100644
index d2f1d27eb62..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/src/csv_reporter.cc
+++ /dev/null
@@ -1,153 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "benchmark/benchmark.h"
-#include "complexity.h"
-
-#include <algorithm>
-#include <cstdint>
-#include <iostream>
-#include <string>
-#include <tuple>
-#include <vector>
-
-#include "check.h"
-#include "string_util.h"
-#include "timers.h"
-
-// File format reference: http://edoceo.com/utilitas/csv-file-format.
-
-namespace benchmark {
-
-namespace {
-std::vector<std::string> elements = {
-    "name",           "iterations",       "real_time",        "cpu_time",
-    "time_unit",      "bytes_per_second", "items_per_second", "label",
-    "error_occurred", "error_message"};
-}  // namespace
-
-bool CSVReporter::ReportContext(const Context& context) {
-  PrintBasicContext(&GetErrorStream(), context);
-  return true;
-}
-
-void CSVReporter::ReportRuns(const std::vector<Run>& reports) {
-  std::ostream& Out = GetOutputStream();
-
-  if (!printed_header_) {
-    // save the names of all the user counters
-    for (const auto& run : reports) {
-      for (const auto& cnt : run.counters) {
-        if (cnt.first == "bytes_per_second" || cnt.first == "items_per_second")
-          continue;
-        user_counter_names_.insert(cnt.first);
-      }
-    }
-
-    // print the header
-    for (auto B = elements.begin(); B != elements.end();) {
-      Out << *B++;
-      if (B != elements.end()) Out << ",";
-    }
-    for (auto B = user_counter_names_.begin();
-         B != user_counter_names_.end();) {
-      Out << ",\"" << *B++ << "\"";
-    }
-    Out << "\n";
-
-    printed_header_ = true;
-  } else {
-    // check that all the current counters are saved in the name set
-    for (const auto& run : reports) {
-      for (const auto& cnt : run.counters) {
-        if (cnt.first == "bytes_per_second" || cnt.first == "items_per_second")
-          continue;
-        CHECK(user_counter_names_.find(cnt.first) != user_counter_names_.end())
-            << "All counters must be present in each run. "
-            << "Counter named \"" << cnt.first
-            << "\" was not in a run after being added to the header";
-      }
-    }
-  }
-
-  // print results for each run
-  for (const auto& run : reports) {
-    PrintRunData(run);
-  }
-}
-
-void CSVReporter::PrintRunData(const Run& run) {
-  std::ostream& Out = GetOutputStream();
-
-  // Field with embedded double-quote characters must be doubled and the field
-  // delimited with double-quotes.
-  std::string name = run.benchmark_name();
-  ReplaceAll(&name, "\"", "\"\"");
-  Out << '"' << name << "\",";
-  if (run.error_occurred) {
-    Out << std::string(elements.size() - 3, ',');
-    Out << "true,";
-    std::string msg = run.error_message;
-    ReplaceAll(&msg, "\"", "\"\"");
-    Out << '"' << msg << "\"\n";
-    return;
-  }
-
-  // Do not print iteration on bigO and RMS report
-  if (!run.report_big_o && !run.report_rms) {
-    Out << run.iterations;
-  }
-  Out << ",";
-
-  Out << run.GetAdjustedRealTime() << ",";
-  Out << run.GetAdjustedCPUTime() << ",";
-
-  // Do not print timeLabel on bigO and RMS report
-  if (run.report_big_o) {
-    Out << GetBigOString(run.complexity);
-  } else if (!run.report_rms) {
-    Out << GetTimeUnitString(run.time_unit);
-  }
-  Out << ",";
-
-  if (run.counters.find("bytes_per_second") != run.counters.end()) {
-    Out << run.counters.at("bytes_per_second");
-  }
-  Out << ",";
-  if (run.counters.find("items_per_second") != run.counters.end()) {
-    Out << run.counters.at("items_per_second");
-  }
-  Out << ",";
-  if (!run.report_label.empty()) {
-    // Field with embedded double-quote characters must be doubled and the field
-    // delimited with double-quotes.
-    std::string label = run.report_label;
-    ReplaceAll(&label, "\"", "\"\"");
-    Out << "\"" << label << "\"";
-  }
-  Out << ",,";  // for error_occurred and error_message
-
-  // Print user counters
-  for (const auto& ucn : user_counter_names_) {
-    auto it = run.counters.find(ucn);
-    if (it == run.counters.end()) {
-      Out << ",";
-    } else {
-      Out << "," << it->second;
-    }
-  }
-  Out << '\n';
-}
-
-}  // end namespace benchmark
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/src/cycleclock.h b/gnu/llvm/libcxx/utils/google-benchmark/src/cycleclock.h
deleted file mode 100644
index d5d62c4c7fe..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/src/cycleclock.h
+++ /dev/null
@@ -1,192 +0,0 @@
-// ----------------------------------------------------------------------
-// CycleClock
-//    A CycleClock tells you the current time in Cycles.  The "time"
-//    is actually time since power-on.  This is like time() but doesn't
-//    involve a system call and is much more precise.
-//
-// NOTE: Not all cpu/platform/kernel combinations guarantee that this
-// clock increments at a constant rate or is synchronized across all logical
-// cpus in a system.
-//
-// If you need the above guarantees, please consider using a different
-// API. There are efforts to provide an interface which provides a millisecond
-// granularity and implemented as a memory read. A memory read is generally
-// cheaper than the CycleClock for many architectures.
-//
-// Also, in some out of order CPU implementations, the CycleClock is not
-// serializing. So if you're trying to count at cycles granularity, your
-// data might be inaccurate due to out of order instruction execution.
-// ----------------------------------------------------------------------
-
-#ifndef BENCHMARK_CYCLECLOCK_H_
-#define BENCHMARK_CYCLECLOCK_H_
-
-#include <cstdint>
-
-#include "benchmark/benchmark.h"
-#include "internal_macros.h"
-
-#if defined(BENCHMARK_OS_MACOSX)
-#include <mach/mach_time.h>
-#endif
-// For MSVC, we want to use '_asm rdtsc' when possible (since it works
-// with even ancient MSVC compilers), and when not possible the
-// __rdtsc intrinsic, declared in <intrin.h>.  Unfortunately, in some
-// environments, <windows.h> and <intrin.h> have conflicting
-// declarations of some other intrinsics, breaking compilation.
-// Therefore, we simply declare __rdtsc ourselves. See also
-// http://connect.microsoft.com/VisualStudio/feedback/details/262047
-#if defined(COMPILER_MSVC) && !defined(_M_IX86)
-extern "C" uint64_t __rdtsc();
-#pragma intrinsic(__rdtsc)
-#endif
-
-#if !defined(BENCHMARK_OS_WINDOWS) || defined(BENCHMARK_OS_MINGW)
-#include <sys/time.h>
-#include <time.h>
-#endif
-
-#ifdef BENCHMARK_OS_EMSCRIPTEN
-#include <emscripten.h>
-#endif
-
-namespace benchmark {
-// NOTE: only i386 and x86_64 have been well tested.
-// PPC, sparc, alpha, and ia64 are based on
-//    http://peter.kuscsik.com/wordpress/?p=14
-// with modifications by m3b.  See also
-//    https://setisvn.ssl.berkeley.edu/svn/lib/fftw-3.0.1/kernel/cycle.h
-namespace cycleclock {
-// This should return the number of cycles since power-on.  Thread-safe.
-inline BENCHMARK_ALWAYS_INLINE int64_t Now() {
-#if defined(BENCHMARK_OS_MACOSX)
-  // this goes at the top because we need ALL Macs, regardless of
-  // architecture, to return the number of "mach time units" that
-  // have passed since startup.  See sysinfo.cc where
-  // InitializeSystemInfo() sets the supposed cpu clock frequency of
-  // macs to the number of mach time units per second, not actual
-  // CPU clock frequency (which can change in the face of CPU
-  // frequency scaling).  Also note that when the Mac sleeps, this
-  // counter pauses; it does not continue counting, nor does it
-  // reset to zero.
-  return mach_absolute_time();
-#elif defined(BENCHMARK_OS_EMSCRIPTEN)
-  // this goes above x86-specific code because old versions of Emscripten
-  // define __x86_64__, although they have nothing to do with it.
-  return static_cast<int64_t>(emscripten_get_now() * 1e+6);
-#elif defined(__i386__)
-  int64_t ret;
-  __asm__ volatile("rdtsc" : "=A"(ret));
-  return ret;
-#elif defined(__x86_64__) || defined(__amd64__)
-  uint64_t low, high;
-  __asm__ volatile("rdtsc" : "=a"(low), "=d"(high));
-  return (high << 32) | low;
-#elif defined(__powerpc__) || defined(__ppc__)
-  // This returns a time-base, which is not always precisely a cycle-count.
-  int64_t tbl, tbu0, tbu1;
-  asm("mftbu %0" : "=r"(tbu0));
-  asm("mftb  %0" : "=r"(tbl));
-  asm("mftbu %0" : "=r"(tbu1));
-  tbl &= -static_cast<int64_t>(tbu0 == tbu1);
-  // high 32 bits in tbu1; low 32 bits in tbl  (tbu0 is garbage)
-  return (tbu1 << 32) | tbl;
-#elif defined(__sparc__)
-  int64_t tick;
-  asm(".byte 0x83, 0x41, 0x00, 0x00");
-  asm("mov   %%g1, %0" : "=r"(tick));
-  return tick;
-#elif defined(__ia64__)
-  int64_t itc;
-  asm("mov %0 = ar.itc" : "=r"(itc));
-  return itc;
-#elif defined(COMPILER_MSVC) && defined(_M_IX86)
-  // Older MSVC compilers (like 7.x) don't seem to support the
-  // __rdtsc intrinsic properly, so I prefer to use _asm instead
-  // when I know it will work.  Otherwise, I'll use __rdtsc and hope
-  // the code is being compiled with a non-ancient compiler.
-  _asm rdtsc
-#elif defined(COMPILER_MSVC)
-  return __rdtsc();
-#elif defined(BENCHMARK_OS_NACL)
-  // Native Client validator on x86/x86-64 allows RDTSC instructions,
-  // and this case is handled above. Native Client validator on ARM
-  // rejects MRC instructions (used in the ARM-specific sequence below),
-  // so we handle it here. Portable Native Client compiles to
-  // architecture-agnostic bytecode, which doesn't provide any
-  // cycle counter access mnemonics.
-
-  // Native Client does not provide any API to access cycle counter.
-  // Use clock_gettime(CLOCK_MONOTONIC, ...) instead of gettimeofday
-  // because is provides nanosecond resolution (which is noticable at
-  // least for PNaCl modules running on x86 Mac & Linux).
-  // Initialize to always return 0 if clock_gettime fails.
-  struct timespec ts = {0, 0};
-  clock_gettime(CLOCK_MONOTONIC, &ts);
-  return static_cast<int64_t>(ts.tv_sec) * 1000000000 + ts.tv_nsec;
-#elif defined(__aarch64__)
-  // System timer of ARMv8 runs at a different frequency than the CPU's.
-  // The frequency is fixed, typically in the range 1-50MHz.  It can be
-  // read at CNTFRQ special register.  We assume the OS has set up
-  // the virtual timer properly.
-  int64_t virtual_timer_value;
-  asm volatile("mrs %0, cntvct_el0" : "=r"(virtual_timer_value));
-  return virtual_timer_value;
-#elif defined(__ARM_ARCH)
-  // V6 is the earliest arch that has a standard cyclecount
-  // Native Client validator doesn't allow MRC instructions.
-#if (__ARM_ARCH >= 6)
-  uint32_t pmccntr;
-  uint32_t pmuseren;
-  uint32_t pmcntenset;
-  // Read the user mode perf monitor counter access permissions.
-  asm volatile("mrc p15, 0, %0, c9, c14, 0" : "=r"(pmuseren));
-  if (pmuseren & 1) {  // Allows reading perfmon counters for user mode code.
-    asm volatile("mrc p15, 0, %0, c9, c12, 1" : "=r"(pmcntenset));
-    if (pmcntenset & 0x80000000ul) {  // Is it counting?
-      asm volatile("mrc p15, 0, %0, c9, c13, 0" : "=r"(pmccntr));
-      // The counter is set up to count every 64th cycle
-      return static_cast<int64_t>(pmccntr) * 64;  // Should optimize to << 6
-    }
-  }
-#endif
-  struct timeval tv;
-  gettimeofday(&tv, nullptr);
-  return static_cast<int64_t>(tv.tv_sec) * 1000000 + tv.tv_usec;
-#elif defined(__mips__)
-  // mips apparently only allows rdtsc for superusers, so we fall
-  // back to gettimeofday.  It's possible clock_gettime would be better.
-  struct timeval tv;
-  gettimeofday(&tv, nullptr);
-  return static_cast<int64_t>(tv.tv_sec) * 1000000 + tv.tv_usec;
-#elif defined(__s390__)  // Covers both s390 and s390x.
-  // Return the CPU clock.
-  uint64_t tsc;
-  asm("stck %0" : "=Q"(tsc) : : "cc");
-  return tsc;
-#elif defined(__riscv) // RISC-V
-  // Use RDCYCLE (and RDCYCLEH on riscv32)
-#if __riscv_xlen == 32
-  uint64_t cycles_low, cycles_hi0, cycles_hi1;
-  asm("rdcycleh %0" : "=r"(cycles_hi0));
-  asm("rdcycle %0" : "=r"(cycles_lo));
-  asm("rdcycleh %0" : "=r"(cycles_hi1));
-  // This matches the PowerPC overflow detection, above
-  cycles_lo &= -static_cast<int64_t>(cycles_hi0 == cycles_hi1);
-  return (cycles_hi1 << 32) | cycles_lo;
-#else
-  uint64_t cycles;
-  asm("rdcycle %0" : "=r"(cycles));
-  return cycles;
-#endif
-#else
-// The soft failover to a generic implementation is automatic only for ARM.
-// For other platforms the developer is expected to make an attempt to create
-// a fast implementation and use generic version if nothing better is available.
-#error You need to define CycleTimer for your OS and CPU
-#endif
-}
-}  // end namespace cycleclock
-}  // end namespace benchmark
-
-#endif  // BENCHMARK_CYCLECLOCK_H_
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/src/internal_macros.h b/gnu/llvm/libcxx/utils/google-benchmark/src/internal_macros.h
deleted file mode 100644
index 5dbf4fd2752..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/src/internal_macros.h
+++ /dev/null
@@ -1,92 +0,0 @@
-#ifndef BENCHMARK_INTERNAL_MACROS_H_
-#define BENCHMARK_INTERNAL_MACROS_H_
-
-#include "benchmark/benchmark.h"
-
-/* Needed to detect STL */
-#include <cstdlib>
-
-// clang-format off
-
-#ifndef __has_feature
-#define __has_feature(x) 0
-#endif
-
-#if defined(__clang__)
-  #if !defined(COMPILER_CLANG)
-    #define COMPILER_CLANG
-  #endif
-#elif defined(_MSC_VER)
-  #if !defined(COMPILER_MSVC)
-    #define COMPILER_MSVC
-  #endif
-#elif defined(__GNUC__)
-  #if !defined(COMPILER_GCC)
-    #define COMPILER_GCC
-  #endif
-#endif
-
-#if __has_feature(cxx_attributes)
-  #define BENCHMARK_NORETURN [[noreturn]]
-#elif defined(__GNUC__)
-  #define BENCHMARK_NORETURN __attribute__((noreturn))
-#elif defined(COMPILER_MSVC)
-  #define BENCHMARK_NORETURN __declspec(noreturn)
-#else
-  #define BENCHMARK_NORETURN
-#endif
-
-#if defined(__CYGWIN__)
-  #define BENCHMARK_OS_CYGWIN 1
-#elif defined(_WIN32)
-  #define BENCHMARK_OS_WINDOWS 1
-  #if defined(__MINGW32__)
-    #define BENCHMARK_OS_MINGW 1
-  #endif
-#elif defined(__APPLE__)
-  #define BENCHMARK_OS_APPLE 1
-  #include "TargetConditionals.h"
-  #if defined(TARGET_OS_MAC)
-    #define BENCHMARK_OS_MACOSX 1
-    #if defined(TARGET_OS_IPHONE)
-      #define BENCHMARK_OS_IOS 1
-    #endif
-  #endif
-#elif defined(__FreeBSD__)
-  #define BENCHMARK_OS_FREEBSD 1
-#elif defined(__NetBSD__)
-  #define BENCHMARK_OS_NETBSD 1
-#elif defined(__OpenBSD__)
-  #define BENCHMARK_OS_OPENBSD 1
-#elif defined(__linux__)
-  #define BENCHMARK_OS_LINUX 1
-#elif defined(__native_client__)
-  #define BENCHMARK_OS_NACL 1
-#elif defined(__EMSCRIPTEN__)
-  #define BENCHMARK_OS_EMSCRIPTEN 1
-#elif defined(__rtems__)
-  #define BENCHMARK_OS_RTEMS 1
-#elif defined(__Fuchsia__)
-#define BENCHMARK_OS_FUCHSIA 1
-#elif defined (__SVR4) && defined (__sun)
-#define BENCHMARK_OS_SOLARIS 1
-#endif
-
-#if defined(__ANDROID__) && defined(__GLIBCXX__)
-#define BENCHMARK_STL_ANDROID_GNUSTL 1
-#endif
-
-#if !__has_feature(cxx_exceptions) && !defined(__cpp_exceptions) \
-     && !defined(__EXCEPTIONS)
-  #define BENCHMARK_HAS_NO_EXCEPTIONS
-#endif
-
-#if defined(COMPILER_CLANG) || defined(COMPILER_GCC)
-  #define BENCHMARK_MAYBE_UNUSED __attribute__((unused))
-#else
-  #define BENCHMARK_MAYBE_UNUSED
-#endif
-
-// clang-format on
-
-#endif  // BENCHMARK_INTERNAL_MACROS_H_
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/src/json_reporter.cc b/gnu/llvm/libcxx/utils/google-benchmark/src/json_reporter.cc
deleted file mode 100644
index 7d01e8e4e31..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/src/json_reporter.cc
+++ /dev/null
@@ -1,220 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "benchmark/benchmark.h"
-#include "complexity.h"
-
-#include <algorithm>
-#include <cstdint>
-#include <iomanip>  // for setprecision
-#include <iostream>
-#include <limits>
-#include <string>
-#include <tuple>
-#include <vector>
-
-#include "string_util.h"
-#include "timers.h"
-
-namespace benchmark {
-
-namespace {
-
-std::string FormatKV(std::string const& key, std::string const& value) {
-  return StrFormat("\"%s\": \"%s\"", key.c_str(), value.c_str());
-}
-
-std::string FormatKV(std::string const& key, const char* value) {
-  return StrFormat("\"%s\": \"%s\"", key.c_str(), value);
-}
-
-std::string FormatKV(std::string const& key, bool value) {
-  return StrFormat("\"%s\": %s", key.c_str(), value ? "true" : "false");
-}
-
-std::string FormatKV(std::string const& key, int64_t value) {
-  std::stringstream ss;
-  ss << '"' << key << "\": " << value;
-  return ss.str();
-}
-
-std::string FormatKV(std::string const& key, double value) {
-  std::stringstream ss;
-  ss << '"' << key << "\": ";
-
-  const auto max_digits10 = std::numeric_limits<decltype(value)>::max_digits10;
-  const auto max_fractional_digits10 = max_digits10 - 1;
-
-  ss << std::scientific << std::setprecision(max_fractional_digits10) << value;
-  return ss.str();
-}
-
-int64_t RoundDouble(double v) { return static_cast<int64_t>(v + 0.5); }
-
-}  // end namespace
-
-bool JSONReporter::ReportContext(const Context& context) {
-  std::ostream& out = GetOutputStream();
-
-  out << "{\n";
-  std::string inner_indent(2, ' ');
-
-  // Open context block and print context information.
-  out << inner_indent << "\"context\": {\n";
-  std::string indent(4, ' ');
-
-  std::string walltime_value = LocalDateTimeString();
-  out << indent << FormatKV("date", walltime_value) << ",\n";
-
-  out << indent << FormatKV("host_name", context.sys_info.name) << ",\n";
-
-  if (Context::executable_name) {
-    // windows uses backslash for its path separator,
-    // which must be escaped in JSON otherwise it blows up conforming JSON
-    // decoders
-    std::string executable_name = Context::executable_name;
-    ReplaceAll(&executable_name, "\\", "\\\\");
-    out << indent << FormatKV("executable", executable_name) << ",\n";
-  }
-
-  CPUInfo const& info = context.cpu_info;
-  out << indent << FormatKV("num_cpus", static_cast<int64_t>(info.num_cpus))
-      << ",\n";
-  out << indent
-      << FormatKV("mhz_per_cpu",
-                  RoundDouble(info.cycles_per_second / 1000000.0))
-      << ",\n";
-  out << indent << FormatKV("cpu_scaling_enabled", info.scaling_enabled)
-      << ",\n";
-
-  out << indent << "\"caches\": [\n";
-  indent = std::string(6, ' ');
-  std::string cache_indent(8, ' ');
-  for (size_t i = 0; i < info.caches.size(); ++i) {
-    auto& CI = info.caches[i];
-    out << indent << "{\n";
-    out << cache_indent << FormatKV("type", CI.type) << ",\n";
-    out << cache_indent << FormatKV("level", static_cast<int64_t>(CI.level))
-        << ",\n";
-    out << cache_indent
-        << FormatKV("size", static_cast<int64_t>(CI.size) * 1000u) << ",\n";
-    out << cache_indent
-        << FormatKV("num_sharing", static_cast<int64_t>(CI.num_sharing))
-        << "\n";
-    out << indent << "}";
-    if (i != info.caches.size() - 1) out << ",";
-    out << "\n";
-  }
-  indent = std::string(4, ' ');
-  out << indent << "],\n";
-  out << indent << "\"load_avg\": [";
-  for (auto it = info.load_avg.begin(); it != info.load_avg.end();) {
-    out << *it++;
-    if (it != info.load_avg.end()) out << ",";
-  }
-  out << "],\n";
-
-#if defined(NDEBUG)
-  const char build_type[] = "release";
-#else
-  const char build_type[] = "debug";
-#endif
-  out << indent << FormatKV("library_build_type", build_type) << "\n";
-  // Close context block and open the list of benchmarks.
-  out << inner_indent << "},\n";
-  out << inner_indent << "\"benchmarks\": [\n";
-  return true;
-}
-
-void JSONReporter::ReportRuns(std::vector<Run> const& reports) {
-  if (reports.empty()) {
-    return;
-  }
-  std::string indent(4, ' ');
-  std::ostream& out = GetOutputStream();
-  if (!first_report_) {
-    out << ",\n";
-  }
-  first_report_ = false;
-
-  for (auto it = reports.begin(); it != reports.end(); ++it) {
-    out << indent << "{\n";
-    PrintRunData(*it);
-    out << indent << '}';
-    auto it_cp = it;
-    if (++it_cp != reports.end()) {
-      out << ",\n";
-    }
-  }
-}
-
-void JSONReporter::Finalize() {
-  // Close the list of benchmarks and the top level object.
-  GetOutputStream() << "\n  ]\n}\n";
-}
-
-void JSONReporter::PrintRunData(Run const& run) {
-  std::string indent(6, ' ');
-  std::ostream& out = GetOutputStream();
-  out << indent << FormatKV("name", run.benchmark_name()) << ",\n";
-  out << indent << FormatKV("run_name", run.run_name) << ",\n";
-  out << indent << FormatKV("run_type", [&run]() -> const char* {
-    switch (run.run_type) {
-      case BenchmarkReporter::Run::RT_Iteration:
-        return "iteration";
-      case BenchmarkReporter::Run::RT_Aggregate:
-        return "aggregate";
-    }
-    BENCHMARK_UNREACHABLE();
-  }()) << ",\n";
-  if (run.run_type == BenchmarkReporter::Run::RT_Aggregate) {
-    out << indent << FormatKV("aggregate_name", run.aggregate_name) << ",\n";
-  }
-  if (run.error_occurred) {
-    out << indent << FormatKV("error_occurred", run.error_occurred) << ",\n";
-    out << indent << FormatKV("error_message", run.error_message) << ",\n";
-  }
-  if (!run.report_big_o && !run.report_rms) {
-    out << indent << FormatKV("iterations", run.iterations) << ",\n";
-    out << indent << FormatKV("real_time", run.GetAdjustedRealTime()) << ",\n";
-    out << indent << FormatKV("cpu_time", run.GetAdjustedCPUTime());
-    out << ",\n"
-        << indent << FormatKV("time_unit", GetTimeUnitString(run.time_unit));
-  } else if (run.report_big_o) {
-    out << indent << FormatKV("cpu_coefficient", run.GetAdjustedCPUTime())
-        << ",\n";
-    out << indent << FormatKV("real_coefficient", run.GetAdjustedRealTime())
-        << ",\n";
-    out << indent << FormatKV("big_o", GetBigOString(run.complexity)) << ",\n";
-    out << indent << FormatKV("time_unit", GetTimeUnitString(run.time_unit));
-  } else if (run.report_rms) {
-    out << indent << FormatKV("rms", run.GetAdjustedCPUTime());
-  }
-
-  for (auto& c : run.counters) {
-    out << ",\n" << indent << FormatKV(c.first, c.second);
-  }
-
-  if (run.has_memory_result) {
-    out << ",\n" << indent << FormatKV("allocs_per_iter", run.allocs_per_iter);
-    out << ",\n" << indent << FormatKV("max_bytes_used", run.max_bytes_used);
-  }
-
-  if (!run.report_label.empty()) {
-    out << ",\n" << indent << FormatKV("label", run.report_label);
-  }
-  out << '\n';
-}
-
-}  // end namespace benchmark
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/src/log.h b/gnu/llvm/libcxx/utils/google-benchmark/src/log.h
deleted file mode 100644
index 47d0c35c018..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/src/log.h
+++ /dev/null
@@ -1,74 +0,0 @@
-#ifndef BENCHMARK_LOG_H_
-#define BENCHMARK_LOG_H_
-
-#include <iostream>
-#include <ostream>
-
-#include "benchmark/benchmark.h"
-
-namespace benchmark {
-namespace internal {
-
-typedef std::basic_ostream<char>&(EndLType)(std::basic_ostream<char>&);
-
-class LogType {
-  friend LogType& GetNullLogInstance();
-  friend LogType& GetErrorLogInstance();
-
-  // FIXME: Add locking to output.
-  template <class Tp>
-  friend LogType& operator<<(LogType&, Tp const&);
-  friend LogType& operator<<(LogType&, EndLType*);
-
- private:
-  LogType(std::ostream* out) : out_(out) {}
-  std::ostream* out_;
-  BENCHMARK_DISALLOW_COPY_AND_ASSIGN(LogType);
-};
-
-template <class Tp>
-LogType& operator<<(LogType& log, Tp const& value) {
-  if (log.out_) {
-    *log.out_ << value;
-  }
-  return log;
-}
-
-inline LogType& operator<<(LogType& log, EndLType* m) {
-  if (log.out_) {
-    *log.out_ << m;
-  }
-  return log;
-}
-
-inline int& LogLevel() {
-  static int log_level = 0;
-  return log_level;
-}
-
-inline LogType& GetNullLogInstance() {
-  static LogType log(nullptr);
-  return log;
-}
-
-inline LogType& GetErrorLogInstance() {
-  static LogType log(&std::clog);
-  return log;
-}
-
-inline LogType& GetLogInstanceForLevel(int level) {
-  if (level <= LogLevel()) {
-    return GetErrorLogInstance();
-  }
-  return GetNullLogInstance();
-}
-
-}  // end namespace internal
-}  // end namespace benchmark
-
-// clang-format off
-#define VLOG(x)                                                               \
-  (::benchmark::internal::GetLogInstanceForLevel(x) << "-- LOG(" << x << "):" \
-                                                                         " ")
-// clang-format on
-#endif
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/src/mutex.h b/gnu/llvm/libcxx/utils/google-benchmark/src/mutex.h
deleted file mode 100644
index 5f461d05a0c..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/src/mutex.h
+++ /dev/null
@@ -1,155 +0,0 @@
-#ifndef BENCHMARK_MUTEX_H_
-#define BENCHMARK_MUTEX_H_
-
-#include <condition_variable>
-#include <mutex>
-
-#include "check.h"
-
-// Enable thread safety attributes only with clang.
-// The attributes can be safely erased when compiling with other compilers.
-#if defined(HAVE_THREAD_SAFETY_ATTRIBUTES)
-#define THREAD_ANNOTATION_ATTRIBUTE__(x) __attribute__((x))
-#else
-#define THREAD_ANNOTATION_ATTRIBUTE__(x)  // no-op
-#endif
-
-#define CAPABILITY(x) THREAD_ANNOTATION_ATTRIBUTE__(capability(x))
-
-#define SCOPED_CAPABILITY THREAD_ANNOTATION_ATTRIBUTE__(scoped_lockable)
-
-#define GUARDED_BY(x) THREAD_ANNOTATION_ATTRIBUTE__(guarded_by(x))
-
-#define PT_GUARDED_BY(x) THREAD_ANNOTATION_ATTRIBUTE__(pt_guarded_by(x))
-
-#define ACQUIRED_BEFORE(...) \
-  THREAD_ANNOTATION_ATTRIBUTE__(acquired_before(__VA_ARGS__))
-
-#define ACQUIRED_AFTER(...) \
-  THREAD_ANNOTATION_ATTRIBUTE__(acquired_after(__VA_ARGS__))
-
-#define REQUIRES(...) \
-  THREAD_ANNOTATION_ATTRIBUTE__(requires_capability(__VA_ARGS__))
-
-#define REQUIRES_SHARED(...) \
-  THREAD_ANNOTATION_ATTRIBUTE__(requires_shared_capability(__VA_ARGS__))
-
-#define ACQUIRE(...) \
-  THREAD_ANNOTATION_ATTRIBUTE__(acquire_capability(__VA_ARGS__))
-
-#define ACQUIRE_SHARED(...) \
-  THREAD_ANNOTATION_ATTRIBUTE__(acquire_shared_capability(__VA_ARGS__))
-
-#define RELEASE(...) \
-  THREAD_ANNOTATION_ATTRIBUTE__(release_capability(__VA_ARGS__))
-
-#define RELEASE_SHARED(...) \
-  THREAD_ANNOTATION_ATTRIBUTE__(release_shared_capability(__VA_ARGS__))
-
-#define TRY_ACQUIRE(...) \
-  THREAD_ANNOTATION_ATTRIBUTE__(try_acquire_capability(__VA_ARGS__))
-
-#define TRY_ACQUIRE_SHARED(...) \
-  THREAD_ANNOTATION_ATTRIBUTE__(try_acquire_shared_capability(__VA_ARGS__))
-
-#define EXCLUDES(...) THREAD_ANNOTATION_ATTRIBUTE__(locks_excluded(__VA_ARGS__))
-
-#define ASSERT_CAPABILITY(x) THREAD_ANNOTATION_ATTRIBUTE__(assert_capability(x))
-
-#define ASSERT_SHARED_CAPABILITY(x) \
-  THREAD_ANNOTATION_ATTRIBUTE__(assert_shared_capability(x))
-
-#define RETURN_CAPABILITY(x) THREAD_ANNOTATION_ATTRIBUTE__(lock_returned(x))
-
-#define NO_THREAD_SAFETY_ANALYSIS \
-  THREAD_ANNOTATION_ATTRIBUTE__(no_thread_safety_analysis)
-
-namespace benchmark {
-
-typedef std::condition_variable Condition;
-
-// NOTE: Wrappers for std::mutex and std::unique_lock are provided so that
-// we can annotate them with thread safety attributes and use the
-// -Wthread-safety warning with clang. The standard library types cannot be
-// used directly because they do not provided the required annotations.
-class CAPABILITY("mutex") Mutex {
- public:
-  Mutex() {}
-
-  void lock() ACQUIRE() { mut_.lock(); }
-  void unlock() RELEASE() { mut_.unlock(); }
-  std::mutex& native_handle() { return mut_; }
-
- private:
-  std::mutex mut_;
-};
-
-class SCOPED_CAPABILITY MutexLock {
-  typedef std::unique_lock<std::mutex> MutexLockImp;
-
- public:
-  MutexLock(Mutex& m) ACQUIRE(m) : ml_(m.native_handle()) {}
-  ~MutexLock() RELEASE() {}
-  MutexLockImp& native_handle() { return ml_; }
-
- private:
-  MutexLockImp ml_;
-};
-
-class Barrier {
- public:
-  Barrier(int num_threads) : running_threads_(num_threads) {}
-
-  // Called by each thread
-  bool wait() EXCLUDES(lock_) {
-    bool last_thread = false;
-    {
-      MutexLock ml(lock_);
-      last_thread = createBarrier(ml);
-    }
-    if (last_thread) phase_condition_.notify_all();
-    return last_thread;
-  }
-
-  void removeThread() EXCLUDES(lock_) {
-    MutexLock ml(lock_);
-    --running_threads_;
-    if (entered_ != 0) phase_condition_.notify_all();
-  }
-
- private:
-  Mutex lock_;
-  Condition phase_condition_;
-  int running_threads_;
-
-  // State for barrier management
-  int phase_number_ = 0;
-  int entered_ = 0;  // Number of threads that have entered this barrier
-
-  // Enter the barrier and wait until all other threads have also
-  // entered the barrier.  Returns iff this is the last thread to
-  // enter the barrier.
-  bool createBarrier(MutexLock& ml) REQUIRES(lock_) {
-    CHECK_LT(entered_, running_threads_);
-    entered_++;
-    if (entered_ < running_threads_) {
-      // Wait for all threads to enter
-      int phase_number_cp = phase_number_;
-      auto cb = [this, phase_number_cp]() {
-        return this->phase_number_ > phase_number_cp ||
-               entered_ == running_threads_;  // A thread has aborted in error
-      };
-      phase_condition_.wait(ml.native_handle(), cb);
-      if (phase_number_ > phase_number_cp) return false;
-      // else (running_threads_ == entered_) and we are the last thread.
-    }
-    // Last thread has reached the barrier
-    phase_number_++;
-    entered_ = 0;
-    return true;
-  }
-};
-
-}  // end namespace benchmark
-
-#endif  // BENCHMARK_MUTEX_H_
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/src/perf_counters.cc b/gnu/llvm/libcxx/utils/google-benchmark/src/perf_counters.cc
deleted file mode 100644
index 4ddf0de2502..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/src/perf_counters.cc
+++ /dev/null
@@ -1,132 +0,0 @@
-// Copyright 2021 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "perf_counters.h"
-
-#include <cstring>
-#include <vector>
-
-#if defined HAVE_LIBPFM
-#include "perfmon/pfmlib.h"
-#include "perfmon/pfmlib_perf_event.h"
-#endif
-
-namespace benchmark {
-namespace internal {
-
-constexpr size_t PerfCounterValues::kMaxCounters;
-
-#if defined HAVE_LIBPFM
-const bool PerfCounters::kSupported = true;
-
-bool PerfCounters::Initialize() { return pfm_initialize() == PFM_SUCCESS; }
-
-PerfCounters PerfCounters::Create(
-    const std::vector<std::string>& counter_names) {
-  if (counter_names.empty()) {
-    return NoCounters();
-  }
-  if (counter_names.size() > PerfCounterValues::kMaxCounters) {
-    GetErrorLogInstance()
-        << counter_names.size()
-        << " counters were requested. The minimum is 1, the maximum is "
-        << PerfCounterValues::kMaxCounters << "\n";
-    return NoCounters();
-  }
-  std::vector<int> counter_ids(counter_names.size());
-
-  const int mode = PFM_PLM3;  // user mode only
-  for (size_t i = 0; i < counter_names.size(); ++i) {
-    const bool is_first = i == 0;
-    struct perf_event_attr attr{};
-    attr.size = sizeof(attr);
-    const int group_id = !is_first ? counter_ids[0] : -1;
-    const auto& name = counter_names[i];
-    if (name.empty()) {
-      GetErrorLogInstance() << "A counter name was the empty string\n";
-      return NoCounters();
-    }
-    pfm_perf_encode_arg_t arg{};
-    arg.attr = &attr;
-
-    const int pfm_get =
-        pfm_get_os_event_encoding(name.c_str(), mode, PFM_OS_PERF_EVENT, &arg);
-    if (pfm_get != PFM_SUCCESS) {
-      GetErrorLogInstance() << "Unknown counter name: " << name << "\n";
-      return NoCounters();
-    }
-    attr.disabled = is_first;
-    // Note: the man page for perf_event_create suggests inerit = true and
-    // read_format = PERF_FORMAT_GROUP don't work together, but that's not the
-    // case.
-    attr.inherit = true;
-    attr.pinned = is_first;
-    attr.exclude_kernel = true;
-    attr.exclude_user = false;
-    attr.exclude_hv = true;
-    // Read all counters in one read.
-    attr.read_format = PERF_FORMAT_GROUP;
-
-    int id = -1;
-    static constexpr size_t kNrOfSyscallRetries = 5;
-    // Retry syscall as it was interrupted often (b/64774091).
-    for (size_t num_retries = 0; num_retries < kNrOfSyscallRetries;
-         ++num_retries) {
-      id = perf_event_open(&attr, 0, -1, group_id, 0);
-      if (id >= 0 || errno != EINTR) {
-        break;
-      }
-    }
-    if (id < 0) {
-      GetErrorLogInstance()
-          << "Failed to get a file descriptor for " << name << "\n";
-      return NoCounters();
-    }
-
-    counter_ids[i] = id;
-  }
-  if (ioctl(counter_ids[0], PERF_EVENT_IOC_ENABLE) != 0) {
-    GetErrorLogInstance() << "Failed to start counters\n";
-    return NoCounters();
-  }
-
-  return PerfCounters(counter_names, std::move(counter_ids));
-}
-
-PerfCounters::~PerfCounters() {
-  if (counter_ids_.empty()) {
-    return;
-  }
-  ioctl(counter_ids_[0], PERF_EVENT_IOC_DISABLE);
-  for (int fd : counter_ids_) {
-    close(fd);
-  }
-}
-#else   // defined HAVE_LIBPFM
-const bool PerfCounters::kSupported = false;
-
-bool PerfCounters::Initialize() { return false; }
-
-PerfCounters PerfCounters::Create(
-    const std::vector<std::string>& counter_names) {
-  if (!counter_names.empty()) {
-    GetErrorLogInstance() << "Performance counters not supported.";
-  }
-  return NoCounters();
-}
-
-PerfCounters::~PerfCounters() = default;
-#endif  // defined HAVE_LIBPFM
-}  // namespace internal
-}  // namespace benchmark
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/src/perf_counters.h b/gnu/llvm/libcxx/utils/google-benchmark/src/perf_counters.h
deleted file mode 100644
index b6629b99070..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/src/perf_counters.h
+++ /dev/null
@@ -1,172 +0,0 @@
-// Copyright 2021 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef BENCHMARK_PERF_COUNTERS_H
-#define BENCHMARK_PERF_COUNTERS_H
-
-#include <array>
-#include <cstdint>
-#include <vector>
-
-#include "benchmark/benchmark.h"
-#include "check.h"
-#include "log.h"
-
-#ifndef BENCHMARK_OS_WINDOWS
-#include <unistd.h>
-#endif
-
-namespace benchmark {
-namespace internal {
-
-// Typically, we can only read a small number of counters. There is also a
-// padding preceding counter values, when reading multiple counters with one
-// syscall (which is desirable). PerfCounterValues abstracts these details.
-// The implementation ensures the storage is inlined, and allows 0-based
-// indexing into the counter values.
-// The object is used in conjunction with a PerfCounters object, by passing it
-// to Snapshot(). The values are populated such that
-// perfCounters->names()[i]'s value is obtained at position i (as given by
-// operator[]) of this object.
-class PerfCounterValues {
- public:
-  explicit PerfCounterValues(size_t nr_counters) : nr_counters_(nr_counters) {
-    CHECK_LE(nr_counters_, kMaxCounters);
-  }
-
-  uint64_t operator[](size_t pos) const { return values_[kPadding + pos]; }
-
-  static constexpr size_t kMaxCounters = 3;
-
- private:
-  friend class PerfCounters;
-  // Get the byte buffer in which perf counters can be captured.
-  // This is used by PerfCounters::Read
-  std::pair<char*, size_t> get_data_buffer() {
-    return {reinterpret_cast<char*>(values_.data()),
-            sizeof(uint64_t) * (kPadding + nr_counters_)};
-  }
-
-  static constexpr size_t kPadding = 1;
-  std::array<uint64_t, kPadding + kMaxCounters> values_;
-  const size_t nr_counters_;
-};
-
-// Collect PMU counters. The object, once constructed, is ready to be used by
-// calling read(). PMU counter collection is enabled from the time create() is
-// called, to obtain the object, until the object's destructor is called.
-class PerfCounters final {
- public:
-  // True iff this platform supports performance counters.
-  static const bool kSupported;
-
-  bool IsValid() const { return is_valid_; }
-  static PerfCounters NoCounters() { return PerfCounters(); }
-
-  ~PerfCounters();
-  PerfCounters(PerfCounters&&) = default;
-  PerfCounters(const PerfCounters&) = delete;
-
-  // Platform-specific implementations may choose to do some library
-  // initialization here.
-  static bool Initialize();
-
-  // Return a PerfCounters object ready to read the counters with the names
-  // specified. The values are user-mode only. The counter name format is
-  // implementation and OS specific.
-  // TODO: once we move to C++-17, this should be a std::optional, and then the
-  // IsValid() boolean can be dropped.
-  static PerfCounters Create(const std::vector<std::string>& counter_names);
-
-  // Take a snapshot of the current value of the counters into the provided
-  // valid PerfCounterValues storage. The values are populated such that:
-  // names()[i]'s value is (*values)[i]
-  BENCHMARK_ALWAYS_INLINE bool Snapshot(PerfCounterValues* values) const {
-#ifndef BENCHMARK_OS_WINDOWS
-    assert(values != nullptr);
-    assert(IsValid());
-    auto buffer = values->get_data_buffer();
-    auto read_bytes = ::read(counter_ids_[0], buffer.first, buffer.second);
-    return static_cast<size_t>(read_bytes) == buffer.second;
-#else
-    (void)values;
-    return false;
-#endif
-  }
-
-  const std::vector<std::string>& names() const { return counter_names_; }
-  size_t num_counters() const { return counter_names_.size(); }
-
- private:
-  PerfCounters(const std::vector<std::string>& counter_names,
-               std::vector<int>&& counter_ids)
-      : counter_ids_(std::move(counter_ids)),
-        counter_names_(counter_names),
-        is_valid_(true) {}
-  PerfCounters() : is_valid_(false) {}
-
-  std::vector<int> counter_ids_;
-  const std::vector<std::string> counter_names_;
-  const bool is_valid_;
-};
-
-// Typical usage of the above primitives.
-class PerfCountersMeasurement final {
- public:
-  PerfCountersMeasurement(PerfCounters&& c)
-      : counters_(std::move(c)),
-        start_values_(counters_.IsValid() ? counters_.names().size() : 0),
-        end_values_(counters_.IsValid() ? counters_.names().size() : 0) {}
-
-  bool IsValid() const { return counters_.IsValid(); }
-
-  BENCHMARK_ALWAYS_INLINE void Start() {
-    assert(IsValid());
-    // Tell the compiler to not move instructions above/below where we take
-    // the snapshot.
-    ClobberMemory();
-    counters_.Snapshot(&start_values_);
-    ClobberMemory();
-  }
-
-  BENCHMARK_ALWAYS_INLINE std::vector<std::pair<std::string, double>>
-  StopAndGetMeasurements() {
-    assert(IsValid());
-    // Tell the compiler to not move instructions above/below where we take
-    // the snapshot.
-    ClobberMemory();
-    counters_.Snapshot(&end_values_);
-    ClobberMemory();
-
-    std::vector<std::pair<std::string, double>> ret;
-    for (size_t i = 0; i < counters_.names().size(); ++i) {
-      double measurement = static_cast<double>(end_values_[i]) -
-                           static_cast<double>(start_values_[i]);
-      ret.push_back({counters_.names()[i], measurement});
-    }
-    return ret;
-  }
-
- private:
-  PerfCounters counters_;
-  PerfCounterValues start_values_;
-  PerfCounterValues end_values_;
-};
-
-BENCHMARK_UNUSED static bool perf_init_anchor = PerfCounters::Initialize();
-
-}  // namespace internal
-}  // namespace benchmark
-
-#endif  // BENCHMARK_PERF_COUNTERS_H
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/src/re.h b/gnu/llvm/libcxx/utils/google-benchmark/src/re.h
deleted file mode 100644
index fbe25037b46..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/src/re.h
+++ /dev/null
@@ -1,158 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef BENCHMARK_RE_H_
-#define BENCHMARK_RE_H_
-
-#include "internal_macros.h"
-
-// clang-format off
-
-#if !defined(HAVE_STD_REGEX) && \
-    !defined(HAVE_GNU_POSIX_REGEX) && \
-    !defined(HAVE_POSIX_REGEX)
-  // No explicit regex selection; detect based on builtin hints.
-  #if defined(BENCHMARK_OS_LINUX) || defined(BENCHMARK_OS_APPLE)
-    #define HAVE_POSIX_REGEX 1
-  #elif __cplusplus >= 199711L
-    #define HAVE_STD_REGEX 1
-  #endif
-#endif
-
-// Prefer C regex libraries when compiling w/o exceptions so that we can
-// correctly report errors.
-#if defined(BENCHMARK_HAS_NO_EXCEPTIONS) && \
-    defined(BENCHMARK_HAVE_STD_REGEX) && \
-    (defined(HAVE_GNU_POSIX_REGEX) || defined(HAVE_POSIX_REGEX))
-  #undef HAVE_STD_REGEX
-#endif
-
-#if defined(HAVE_STD_REGEX)
-  #include <regex>
-#elif defined(HAVE_GNU_POSIX_REGEX)
-  #include <gnuregex.h>
-#elif defined(HAVE_POSIX_REGEX)
-  #include <regex.h>
-#else
-#error No regular expression backend was found!
-#endif
-
-// clang-format on
-
-#include <string>
-
-#include "check.h"
-
-namespace benchmark {
-
-// A wrapper around the POSIX regular expression API that provides automatic
-// cleanup
-class Regex {
- public:
-  Regex() : init_(false) {}
-
-  ~Regex();
-
-  // Compile a regular expression matcher from spec.  Returns true on success.
-  //
-  // On failure (and if error is not nullptr), error is populated with a human
-  // readable error message if an error occurs.
-  bool Init(const std::string& spec, std::string* error);
-
-  // Returns whether str matches the compiled regular expression.
-  bool Match(const std::string& str);
-
- private:
-  bool init_;
-// Underlying regular expression object
-#if defined(HAVE_STD_REGEX)
-  std::regex re_;
-#elif defined(HAVE_POSIX_REGEX) || defined(HAVE_GNU_POSIX_REGEX)
-  regex_t re_;
-#else
-#error No regular expression backend implementation available
-#endif
-};
-
-#if defined(HAVE_STD_REGEX)
-
-inline bool Regex::Init(const std::string& spec, std::string* error) {
-#ifdef BENCHMARK_HAS_NO_EXCEPTIONS
-  ((void)error);  // suppress unused warning
-#else
-  try {
-#endif
-  re_ = std::regex(spec, std::regex_constants::extended);
-  init_ = true;
-#ifndef BENCHMARK_HAS_NO_EXCEPTIONS
-}
-catch (const std::regex_error& e) {
-  if (error) {
-    *error = e.what();
-  }
-}
-#endif
-return init_;
-}
-
-inline Regex::~Regex() {}
-
-inline bool Regex::Match(const std::string& str) {
-  if (!init_) {
-    return false;
-  }
-  return std::regex_search(str, re_);
-}
-
-#else
-inline bool Regex::Init(const std::string& spec, std::string* error) {
-  int ec = regcomp(&re_, spec.c_str(), REG_EXTENDED | REG_NOSUB);
-  if (ec != 0) {
-    if (error) {
-      size_t needed = regerror(ec, &re_, nullptr, 0);
-      char* errbuf = new char[needed];
-      regerror(ec, &re_, errbuf, needed);
-
-      // regerror returns the number of bytes necessary to null terminate
-      // the string, so we move that when assigning to error.
-      CHECK_NE(needed, 0);
-      error->assign(errbuf, needed - 1);
-
-      delete[] errbuf;
-    }
-
-    return false;
-  }
-
-  init_ = true;
-  return true;
-}
-
-inline Regex::~Regex() {
-  if (init_) {
-    regfree(&re_);
-  }
-}
-
-inline bool Regex::Match(const std::string& str) {
-  if (!init_) {
-    return false;
-  }
-  return regexec(&re_, str.c_str(), 0, nullptr, 0) == 0;
-}
-#endif
-
-}  // end namespace benchmark
-
-#endif  // BENCHMARK_RE_H_
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/src/reporter.cc b/gnu/llvm/libcxx/utils/google-benchmark/src/reporter.cc
deleted file mode 100644
index 59bc5f71023..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/src/reporter.cc
+++ /dev/null
@@ -1,105 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "benchmark/benchmark.h"
-#include "timers.h"
-
-#include <cstdlib>
-
-#include <iostream>
-#include <tuple>
-#include <vector>
-
-#include "check.h"
-#include "string_util.h"
-
-namespace benchmark {
-
-BenchmarkReporter::BenchmarkReporter()
-    : output_stream_(&std::cout), error_stream_(&std::cerr) {}
-
-BenchmarkReporter::~BenchmarkReporter() {}
-
-void BenchmarkReporter::PrintBasicContext(std::ostream *out,
-                                          Context const &context) {
-  CHECK(out) << "cannot be null";
-  auto &Out = *out;
-
-  Out << LocalDateTimeString() << "\n";
-
-  if (context.executable_name)
-    Out << "Running " << context.executable_name << "\n";
-
-  const CPUInfo &info = context.cpu_info;
-  Out << "Run on (" << info.num_cpus << " X "
-      << (info.cycles_per_second / 1000000.0) << " MHz CPU "
-      << ((info.num_cpus > 1) ? "s" : "") << ")\n";
-  if (info.caches.size() != 0) {
-    Out << "CPU Caches:\n";
-    for (auto &CInfo : info.caches) {
-      Out << "  L" << CInfo.level << " " << CInfo.type << " "
-          << (CInfo.size / 1000) << "K";
-      if (CInfo.num_sharing != 0)
-        Out << " (x" << (info.num_cpus / CInfo.num_sharing) << ")";
-      Out << "\n";
-    }
-  }
-  if (!info.load_avg.empty()) {
-    Out << "Load Average: ";
-    for (auto It = info.load_avg.begin(); It != info.load_avg.end();) {
-      Out << StrFormat("%.2f", *It++);
-      if (It != info.load_avg.end()) Out << ", ";
-    }
-    Out << "\n";
-  }
-
-  if (info.scaling_enabled) {
-    Out << "***WARNING*** CPU scaling is enabled, the benchmark "
-           "real time measurements may be noisy and will incur extra "
-           "overhead.\n";
-  }
-
-#ifndef NDEBUG
-  Out << "***WARNING*** Library was built as DEBUG. Timings may be "
-         "affected.\n";
-#endif
-}
-
-// No initializer because it's already initialized to NULL.
-const char *BenchmarkReporter::Context::executable_name;
-
-BenchmarkReporter::Context::Context()
-    : cpu_info(CPUInfo::Get()), sys_info(SystemInfo::Get()) {}
-
-std::string BenchmarkReporter::Run::benchmark_name() const {
-  std::string name = run_name;
-  if (run_type == RT_Aggregate) {
-    name += "_" + aggregate_name;
-  }
-  return name;
-}
-
-double BenchmarkReporter::Run::GetAdjustedRealTime() const {
-  double new_time = real_accumulated_time * GetTimeUnitMultiplier(time_unit);
-  if (iterations != 0) new_time /= static_cast<double>(iterations);
-  return new_time;
-}
-
-double BenchmarkReporter::Run::GetAdjustedCPUTime() const {
-  double new_time = cpu_accumulated_time * GetTimeUnitMultiplier(time_unit);
-  if (iterations != 0) new_time /= static_cast<double>(iterations);
-  return new_time;
-}
-
-}  // end namespace benchmark
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/src/sleep.cc b/gnu/llvm/libcxx/utils/google-benchmark/src/sleep.cc
deleted file mode 100644
index 1512ac90f7e..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/src/sleep.cc
+++ /dev/null
@@ -1,51 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "sleep.h"
-
-#include <cerrno>
-#include <cstdlib>
-#include <ctime>
-
-#include "internal_macros.h"
-
-#ifdef BENCHMARK_OS_WINDOWS
-#include <windows.h>
-#endif
-
-namespace benchmark {
-#ifdef BENCHMARK_OS_WINDOWS
-// Window's Sleep takes milliseconds argument.
-void SleepForMilliseconds(int milliseconds) { Sleep(milliseconds); }
-void SleepForSeconds(double seconds) {
-  SleepForMilliseconds(static_cast<int>(kNumMillisPerSecond * seconds));
-}
-#else   // BENCHMARK_OS_WINDOWS
-void SleepForMicroseconds(int microseconds) {
-  struct timespec sleep_time;
-  sleep_time.tv_sec = microseconds / kNumMicrosPerSecond;
-  sleep_time.tv_nsec = (microseconds % kNumMicrosPerSecond) * kNumNanosPerMicro;
-  while (nanosleep(&sleep_time, &sleep_time) != 0 && errno == EINTR)
-    ;  // Ignore signals and wait for the full interval to elapse.
-}
-
-void SleepForMilliseconds(int milliseconds) {
-  SleepForMicroseconds(milliseconds * kNumMicrosPerMilli);
-}
-
-void SleepForSeconds(double seconds) {
-  SleepForMicroseconds(static_cast<int>(seconds * kNumMicrosPerSecond));
-}
-#endif  // BENCHMARK_OS_WINDOWS
-}  // end namespace benchmark
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/src/sleep.h b/gnu/llvm/libcxx/utils/google-benchmark/src/sleep.h
deleted file mode 100644
index f98551afe28..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/src/sleep.h
+++ /dev/null
@@ -1,15 +0,0 @@
-#ifndef BENCHMARK_SLEEP_H_
-#define BENCHMARK_SLEEP_H_
-
-namespace benchmark {
-const int kNumMillisPerSecond = 1000;
-const int kNumMicrosPerMilli = 1000;
-const int kNumMicrosPerSecond = kNumMillisPerSecond * 1000;
-const int kNumNanosPerMicro = 1000;
-const int kNumNanosPerSecond = kNumNanosPerMicro * kNumMicrosPerSecond;
-
-void SleepForMilliseconds(int milliseconds);
-void SleepForSeconds(double seconds);
-}  // end namespace benchmark
-
-#endif  // BENCHMARK_SLEEP_H_
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/src/statistics.cc b/gnu/llvm/libcxx/utils/google-benchmark/src/statistics.cc
deleted file mode 100644
index e821aec18b7..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/src/statistics.cc
+++ /dev/null
@@ -1,190 +0,0 @@
-// Copyright 2016 Ismael Jimenez Martinez. All rights reserved.
-// Copyright 2017 Roman Lebedev. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "benchmark/benchmark.h"
-
-#include <algorithm>
-#include <cmath>
-#include <numeric>
-#include <string>
-#include <vector>
-#include "check.h"
-#include "statistics.h"
-
-namespace benchmark {
-
-auto StatisticsSum = [](const std::vector<double>& v) {
-  return std::accumulate(v.begin(), v.end(), 0.0);
-};
-
-double StatisticsMean(const std::vector<double>& v) {
-  if (v.empty()) return 0.0;
-  return StatisticsSum(v) * (1.0 / v.size());
-}
-
-double StatisticsMedian(const std::vector<double>& v) {
-  if (v.size() < 3) return StatisticsMean(v);
-  std::vector<double> copy(v);
-
-  auto center = copy.begin() + v.size() / 2;
-  std::nth_element(copy.begin(), center, copy.end());
-
-  // did we have an odd number of samples?
-  // if yes, then center is the median
-  // it no, then we are looking for the average between center and the value
-  // before
-  if (v.size() % 2 == 1) return *center;
-  auto center2 = copy.begin() + v.size() / 2 - 1;
-  std::nth_element(copy.begin(), center2, copy.end());
-  return (*center + *center2) / 2.0;
-}
-
-// Return the sum of the squares of this sample set
-auto SumSquares = [](const std::vector<double>& v) {
-  return std::inner_product(v.begin(), v.end(), v.begin(), 0.0);
-};
-
-auto Sqr = [](const double dat) { return dat * dat; };
-auto Sqrt = [](const double dat) {
-  // Avoid NaN due to imprecision in the calculations
-  if (dat < 0.0) return 0.0;
-  return std::sqrt(dat);
-};
-
-double StatisticsStdDev(const std::vector<double>& v) {
-  const auto mean = StatisticsMean(v);
-  if (v.empty()) return mean;
-
-  // Sample standard deviation is undefined for n = 1
-  if (v.size() == 1) return 0.0;
-
-  const double avg_squares = SumSquares(v) * (1.0 / v.size());
-  return Sqrt(v.size() / (v.size() - 1.0) * (avg_squares - Sqr(mean)));
-}
-
-std::vector<BenchmarkReporter::Run> ComputeStats(
-    const std::vector<BenchmarkReporter::Run>& reports) {
-  typedef BenchmarkReporter::Run Run;
-  std::vector<Run> results;
-
-  auto error_count =
-      std::count_if(reports.begin(), reports.end(),
-                    [](Run const& run) { return run.error_occurred; });
-
-  if (reports.size() - error_count < 2) {
-    // We don't report aggregated data if there was a single run.
-    return results;
-  }
-
-  // Accumulators.
-  std::vector<double> real_accumulated_time_stat;
-  std::vector<double> cpu_accumulated_time_stat;
-
-  real_accumulated_time_stat.reserve(reports.size());
-  cpu_accumulated_time_stat.reserve(reports.size());
-
-  // All repetitions should be run with the same number of iterations so we
-  // can take this information from the first benchmark.
-  int64_t const run_iterations = reports.front().iterations;
-  // create stats for user counters
-  struct CounterStat {
-    Counter c;
-    std::vector<double> s;
-  };
-  std::map<std::string, CounterStat> counter_stats;
-  for (Run const& r : reports) {
-    for (auto const& cnt : r.counters) {
-      auto it = counter_stats.find(cnt.first);
-      if (it == counter_stats.end()) {
-        counter_stats.insert({cnt.first, {cnt.second, std::vector<double>{}}});
-        it = counter_stats.find(cnt.first);
-        it->second.s.reserve(reports.size());
-      } else {
-        CHECK_EQ(counter_stats[cnt.first].c.flags, cnt.second.flags);
-      }
-    }
-  }
-
-  // Populate the accumulators.
-  for (Run const& run : reports) {
-    CHECK_EQ(reports[0].benchmark_name(), run.benchmark_name());
-    CHECK_EQ(run_iterations, run.iterations);
-    if (run.error_occurred) continue;
-    real_accumulated_time_stat.emplace_back(run.real_accumulated_time);
-    cpu_accumulated_time_stat.emplace_back(run.cpu_accumulated_time);
-    // user counters
-    for (auto const& cnt : run.counters) {
-      auto it = counter_stats.find(cnt.first);
-      CHECK_NE(it, counter_stats.end());
-      it->second.s.emplace_back(cnt.second);
-    }
-  }
-
-  // Only add label if it is same for all runs
-  std::string report_label = reports[0].report_label;
-  for (std::size_t i = 1; i < reports.size(); i++) {
-    if (reports[i].report_label != report_label) {
-      report_label = "";
-      break;
-    }
-  }
-
-  const double iteration_rescale_factor =
-      double(reports.size()) / double(run_iterations);
-
-  for (const auto& Stat : *reports[0].statistics) {
-    // Get the data from the accumulator to BenchmarkReporter::Run's.
-    Run data;
-    data.run_name = reports[0].benchmark_name();
-    data.run_type = BenchmarkReporter::Run::RT_Aggregate;
-    data.aggregate_name = Stat.name_;
-    data.report_label = report_label;
-
-    // It is incorrect to say that an aggregate is computed over
-    // run's iterations, because those iterations already got averaged.
-    // Similarly, if there are N repetitions with 1 iterations each,
-    // an aggregate will be computed over N measurements, not 1.
-    // Thus it is best to simply use the count of separate reports.
-    data.iterations = reports.size();
-
-    data.real_accumulated_time = Stat.compute_(real_accumulated_time_stat);
-    data.cpu_accumulated_time = Stat.compute_(cpu_accumulated_time_stat);
-
-    // We will divide these times by data.iterations when reporting, but the
-    // data.iterations is not nessesairly the scale of these measurements,
-    // because in each repetition, these timers are sum over all the iterations.
-    // And if we want to say that the stats are over N repetitions and not
-    // M iterations, we need to multiply these by (N/M).
-    data.real_accumulated_time *= iteration_rescale_factor;
-    data.cpu_accumulated_time *= iteration_rescale_factor;
-
-    data.time_unit = reports[0].time_unit;
-
-    // user counters
-    for (auto const& kv : counter_stats) {
-      // Do *NOT* rescale the custom counters. They are already properly scaled.
-      const auto uc_stat = Stat.compute_(kv.second.s);
-      auto c = Counter(uc_stat, counter_stats[kv.first].c.flags,
-                       counter_stats[kv.first].c.oneK);
-      data.counters[kv.first] = c;
-    }
-
-    results.push_back(data);
-  }
-
-  return results;
-}
-
-}  // end namespace benchmark
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/src/statistics.h b/gnu/llvm/libcxx/utils/google-benchmark/src/statistics.h
deleted file mode 100644
index 7eccc85536a..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/src/statistics.h
+++ /dev/null
@@ -1,37 +0,0 @@
-// Copyright 2016 Ismael Jimenez Martinez. All rights reserved.
-// Copyright 2017 Roman Lebedev. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#ifndef STATISTICS_H_
-#define STATISTICS_H_
-
-#include <vector>
-
-#include "benchmark/benchmark.h"
-
-namespace benchmark {
-
-// Return a vector containing the mean, median and standard devation information
-// (and any user-specified info) for the specified list of reports. If 'reports'
-// contains less than two non-errored runs an empty vector is returned
-std::vector<BenchmarkReporter::Run> ComputeStats(
-    const std::vector<BenchmarkReporter::Run>& reports);
-
-double StatisticsMean(const std::vector<double>& v);
-double StatisticsMedian(const std::vector<double>& v);
-double StatisticsStdDev(const std::vector<double>& v);
-
-}  // end namespace benchmark
-
-#endif  // STATISTICS_H_
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/src/string_util.cc b/gnu/llvm/libcxx/utils/google-benchmark/src/string_util.cc
deleted file mode 100644
index 05ac5b4ea36..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/src/string_util.cc
+++ /dev/null
@@ -1,261 +0,0 @@
-#include "string_util.h"
-
-#include <array>
-#include <cmath>
-#include <cstdarg>
-#include <cstdio>
-#include <memory>
-#include <sstream>
-
-#include "arraysize.h"
-
-namespace benchmark {
-namespace {
-
-// kilo, Mega, Giga, Tera, Peta, Exa, Zetta, Yotta.
-const char kBigSIUnits[] = "kMGTPEZY";
-// Kibi, Mebi, Gibi, Tebi, Pebi, Exbi, Zebi, Yobi.
-const char kBigIECUnits[] = "KMGTPEZY";
-// milli, micro, nano, pico, femto, atto, zepto, yocto.
-const char kSmallSIUnits[] = "munpfazy";
-
-// We require that all three arrays have the same size.
-static_assert(arraysize(kBigSIUnits) == arraysize(kBigIECUnits),
-              "SI and IEC unit arrays must be the same size");
-static_assert(arraysize(kSmallSIUnits) == arraysize(kBigSIUnits),
-              "Small SI and Big SI unit arrays must be the same size");
-
-static const int64_t kUnitsSize = arraysize(kBigSIUnits);
-
-void ToExponentAndMantissa(double val, double thresh, int precision,
-                           double one_k, std::string* mantissa,
-                           int64_t* exponent) {
-  std::stringstream mantissa_stream;
-
-  if (val < 0) {
-    mantissa_stream << "-";
-    val = -val;
-  }
-
-  // Adjust threshold so that it never excludes things which can't be rendered
-  // in 'precision' digits.
-  const double adjusted_threshold =
-      std::max(thresh, 1.0 / std::pow(10.0, precision));
-  const double big_threshold = adjusted_threshold * one_k;
-  const double small_threshold = adjusted_threshold;
-  // Values in ]simple_threshold,small_threshold[ will be printed as-is
-  const double simple_threshold = 0.01;
-
-  if (val > big_threshold) {
-    // Positive powers
-    double scaled = val;
-    for (size_t i = 0; i < arraysize(kBigSIUnits); ++i) {
-      scaled /= one_k;
-      if (scaled <= big_threshold) {
-        mantissa_stream << scaled;
-        *exponent = i + 1;
-        *mantissa = mantissa_stream.str();
-        return;
-      }
-    }
-    mantissa_stream << val;
-    *exponent = 0;
-  } else if (val < small_threshold) {
-    // Negative powers
-    if (val < simple_threshold) {
-      double scaled = val;
-      for (size_t i = 0; i < arraysize(kSmallSIUnits); ++i) {
-        scaled *= one_k;
-        if (scaled >= small_threshold) {
-          mantissa_stream << scaled;
-          *exponent = -static_cast<int64_t>(i + 1);
-          *mantissa = mantissa_stream.str();
-          return;
-        }
-      }
-    }
-    mantissa_stream << val;
-    *exponent = 0;
-  } else {
-    mantissa_stream << val;
-    *exponent = 0;
-  }
-  *mantissa = mantissa_stream.str();
-}
-
-std::string ExponentToPrefix(int64_t exponent, bool iec) {
-  if (exponent == 0) return "";
-
-  const int64_t index = (exponent > 0 ? exponent - 1 : -exponent - 1);
-  if (index >= kUnitsSize) return "";
-
-  const char* array =
-      (exponent > 0 ? (iec ? kBigIECUnits : kBigSIUnits) : kSmallSIUnits);
-  if (iec)
-    return array[index] + std::string("i");
-  else
-    return std::string(1, array[index]);
-}
-
-std::string ToBinaryStringFullySpecified(double value, double threshold,
-                                         int precision, double one_k = 1024.0) {
-  std::string mantissa;
-  int64_t exponent;
-  ToExponentAndMantissa(value, threshold, precision, one_k, &mantissa,
-                        &exponent);
-  return mantissa + ExponentToPrefix(exponent, false);
-}
-
-}  // end namespace
-
-void AppendHumanReadable(int n, std::string* str) {
-  std::stringstream ss;
-  // Round down to the nearest SI prefix.
-  ss << ToBinaryStringFullySpecified(n, 1.0, 0);
-  *str += ss.str();
-}
-
-std::string HumanReadableNumber(double n, double one_k) {
-  // 1.1 means that figures up to 1.1k should be shown with the next unit down;
-  // this softens edge effects.
-  // 1 means that we should show one decimal place of precision.
-  return ToBinaryStringFullySpecified(n, 1.1, 1, one_k);
-}
-
-std::string StrFormatImp(const char* msg, va_list args) {
-  // we might need a second shot at this, so pre-emptivly make a copy
-  va_list args_cp;
-  va_copy(args_cp, args);
-
-  // TODO(ericwf): use std::array for first attempt to avoid one memory
-  // allocation guess what the size might be
-  std::array<char, 256> local_buff;
-  std::size_t size = local_buff.size();
-  // 2015-10-08: vsnprintf is used instead of snd::vsnprintf due to a limitation
-  // in the android-ndk
-  auto ret = vsnprintf(local_buff.data(), size, msg, args_cp);
-
-  va_end(args_cp);
-
-  // handle empty expansion
-  if (ret == 0) return std::string{};
-  if (static_cast<std::size_t>(ret) < size)
-    return std::string(local_buff.data());
-
-  // we did not provide a long enough buffer on our first attempt.
-  // add 1 to size to account for null-byte in size cast to prevent overflow
-  size = static_cast<std::size_t>(ret) + 1;
-  auto buff_ptr = std::unique_ptr<char[]>(new char[size]);
-  // 2015-10-08: vsnprintf is used instead of snd::vsnprintf due to a limitation
-  // in the android-ndk
-  ret = vsnprintf(buff_ptr.get(), size, msg, args);
-  return std::string(buff_ptr.get());
-}
-
-std::string StrFormat(const char* format, ...) {
-  va_list args;
-  va_start(args, format);
-  std::string tmp = StrFormatImp(format, args);
-  va_end(args);
-  return tmp;
-}
-
-void ReplaceAll(std::string* str, const std::string& from,
-                const std::string& to) {
-  std::size_t start = 0;
-  while ((start = str->find(from, start)) != std::string::npos) {
-    str->replace(start, from.length(), to);
-    start += to.length();
-  }
-}
-
-#ifdef BENCHMARK_STL_ANDROID_GNUSTL
-/*
- * GNU STL in Android NDK lacks support for some C++11 functions, including
- * stoul, stoi, stod. We reimplement them here using C functions strtoul,
- * strtol, strtod. Note that reimplemented functions are in benchmark::
- * namespace, not std:: namespace.
- */
-unsigned long stoul(const std::string& str, size_t* pos, int base) {
-  /* Record previous errno */
-  const int oldErrno = errno;
-  errno = 0;
-
-  const char* strStart = str.c_str();
-  char* strEnd = const_cast<char*>(strStart);
-  const unsigned long result = strtoul(strStart, &strEnd, base);
-
-  const int strtoulErrno = errno;
-  /* Restore previous errno */
-  errno = oldErrno;
-
-  /* Check for errors and return */
-  if (strtoulErrno == ERANGE) {
-    throw std::out_of_range(
-      "stoul failed: " + str + " is outside of range of unsigned long");
-  } else if (strEnd == strStart || strtoulErrno != 0) {
-    throw std::invalid_argument(
-      "stoul failed: " + str + " is not an integer");
-  }
-  if (pos != nullptr) {
-    *pos = static_cast<size_t>(strEnd - strStart);
-  }
-  return result;
-}
-
-int stoi(const std::string& str, size_t* pos, int base) {
-  /* Record previous errno */
-  const int oldErrno = errno;
-  errno = 0;
-
-  const char* strStart = str.c_str();
-  char* strEnd = const_cast<char*>(strStart);
-  const long result = strtol(strStart, &strEnd, base);
-
-  const int strtolErrno = errno;
-  /* Restore previous errno */
-  errno = oldErrno;
-
-  /* Check for errors and return */
-  if (strtolErrno == ERANGE || long(int(result)) != result) {
-    throw std::out_of_range(
-      "stoul failed: " + str + " is outside of range of int");
-  } else if (strEnd == strStart || strtolErrno != 0) {
-    throw std::invalid_argument(
-      "stoul failed: " + str + " is not an integer");
-  }
-  if (pos != nullptr) {
-    *pos = static_cast<size_t>(strEnd - strStart);
-  }
-  return int(result);
-}
-
-double stod(const std::string& str, size_t* pos) {
-  /* Record previous errno */
-  const int oldErrno = errno;
-  errno = 0;
-
-  const char* strStart = str.c_str();
-  char* strEnd = const_cast<char*>(strStart);
-  const double result = strtod(strStart, &strEnd);
-
-  /* Restore previous errno */
-  const int strtodErrno = errno;
-  errno = oldErrno;
-
-  /* Check for errors and return */
-  if (strtodErrno == ERANGE) {
-    throw std::out_of_range(
-      "stoul failed: " + str + " is outside of range of int");
-  } else if (strEnd == strStart || strtodErrno != 0) {
-    throw std::invalid_argument(
-      "stoul failed: " + str + " is not an integer");
-  }
-  if (pos != nullptr) {
-    *pos = static_cast<size_t>(strEnd - strStart);
-  }
-  return result;
-}
-#endif
-
-}  // end namespace benchmark
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/src/string_util.h b/gnu/llvm/libcxx/utils/google-benchmark/src/string_util.h
deleted file mode 100644
index fc5f8b0304b..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/src/string_util.h
+++ /dev/null
@@ -1,60 +0,0 @@
-#ifndef BENCHMARK_STRING_UTIL_H_
-#define BENCHMARK_STRING_UTIL_H_
-
-#include <sstream>
-#include <string>
-#include <utility>
-#include "internal_macros.h"
-
-namespace benchmark {
-
-void AppendHumanReadable(int n, std::string* str);
-
-std::string HumanReadableNumber(double n, double one_k = 1024.0);
-
-#ifdef __GNUC__
-__attribute__((format(printf, 1, 2)))
-#endif
-std::string
-StrFormat(const char* format, ...);
-
-inline std::ostream& StrCatImp(std::ostream& out) BENCHMARK_NOEXCEPT {
-  return out;
-}
-
-template <class First, class... Rest>
-inline std::ostream& StrCatImp(std::ostream& out, First&& f, Rest&&... rest) {
-  out << std::forward<First>(f);
-  return StrCatImp(out, std::forward<Rest>(rest)...);
-}
-
-template <class... Args>
-inline std::string StrCat(Args&&... args) {
-  std::ostringstream ss;
-  StrCatImp(ss, std::forward<Args>(args)...);
-  return ss.str();
-}
-
-void ReplaceAll(std::string* str, const std::string& from,
-                const std::string& to);
-
-#ifdef BENCHMARK_STL_ANDROID_GNUSTL
-/*
- * GNU STL in Android NDK lacks support for some C++11 functions, including
- * stoul, stoi, stod. We reimplement them here using C functions strtoul,
- * strtol, strtod. Note that reimplemented functions are in benchmark::
- * namespace, not std:: namespace.
- */
-unsigned long stoul(const std::string& str, size_t* pos = nullptr,
-                           int base = 10);
-int stoi(const std::string& str, size_t* pos = nullptr, int base = 10);
-double stod(const std::string& str, size_t* pos = nullptr);
-#else
-using std::stoul;
-using std::stoi;
-using std::stod;
-#endif
-
-}  // end namespace benchmark
-
-#endif  // BENCHMARK_STRING_UTIL_H_
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/src/sysinfo.cc b/gnu/llvm/libcxx/utils/google-benchmark/src/sysinfo.cc
deleted file mode 100644
index c0c07e5e62a..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/src/sysinfo.cc
+++ /dev/null
@@ -1,650 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "internal_macros.h"
-
-#ifdef BENCHMARK_OS_WINDOWS
-#include <shlwapi.h>
-#undef StrCat  // Don't let StrCat in string_util.h be renamed to lstrcatA
-#include <versionhelpers.h>
-#include <windows.h>
-#include <codecvt>
-#else
-#include <fcntl.h>
-#ifndef BENCHMARK_OS_FUCHSIA
-#include <sys/resource.h>
-#endif
-#include <sys/time.h>
-#include <sys/types.h>  // this header must be included before 'sys/sysctl.h' to avoid compilation error on FreeBSD
-#include <unistd.h>
-#if defined BENCHMARK_OS_FREEBSD || defined BENCHMARK_OS_MACOSX || \
-    defined BENCHMARK_OS_NETBSD || defined BENCHMARK_OS_OPENBSD
-#define BENCHMARK_HAS_SYSCTL
-#include <sys/sysctl.h>
-#endif
-#endif
-#if defined(BENCHMARK_OS_SOLARIS)
-#include <kstat.h>
-#endif
-
-#include <algorithm>
-#include <array>
-#include <bitset>
-#include <cerrno>
-#include <climits>
-#include <cstdint>
-#include <cstdio>
-#include <cstdlib>
-#include <cstring>
-#include <fstream>
-#include <iostream>
-#include <iterator>
-#include <limits>
-#include <memory>
-#include <sstream>
-#include <locale>
-
-#include "check.h"
-#include "cycleclock.h"
-#include "internal_macros.h"
-#include "log.h"
-#include "sleep.h"
-#include "string_util.h"
-
-namespace benchmark {
-namespace {
-
-void PrintImp(std::ostream& out) { out << std::endl; }
-
-template <class First, class... Rest>
-void PrintImp(std::ostream& out, First&& f, Rest&&... rest) {
-  out << std::forward<First>(f);
-  PrintImp(out, std::forward<Rest>(rest)...);
-}
-
-template <class... Args>
-BENCHMARK_NORETURN void PrintErrorAndDie(Args&&... args) {
-  PrintImp(std::cerr, std::forward<Args>(args)...);
-  std::exit(EXIT_FAILURE);
-}
-
-#ifdef BENCHMARK_HAS_SYSCTL
-
-/// ValueUnion - A type used to correctly alias the byte-for-byte output of
-/// `sysctl` with the result type it's to be interpreted as.
-struct ValueUnion {
-  union DataT {
-    uint32_t uint32_value;
-    uint64_t uint64_value;
-    // For correct aliasing of union members from bytes.
-    char bytes[8];
-  };
-  using DataPtr = std::unique_ptr<DataT, decltype(&std::free)>;
-
-  // The size of the data union member + its trailing array size.
-  size_t Size;
-  DataPtr Buff;
-
- public:
-  ValueUnion() : Size(0), Buff(nullptr, &std::free) {}
-
-  explicit ValueUnion(size_t BuffSize)
-      : Size(sizeof(DataT) + BuffSize),
-        Buff(::new (std::malloc(Size)) DataT(), &std::free) {}
-
-  ValueUnion(ValueUnion&& other) = default;
-
-  explicit operator bool() const { return bool(Buff); }
-
-  char* data() const { return Buff->bytes; }
-
-  std::string GetAsString() const { return std::string(data()); }
-
-  int64_t GetAsInteger() const {
-    if (Size == sizeof(Buff->uint32_value))
-      return static_cast<int32_t>(Buff->uint32_value);
-    else if (Size == sizeof(Buff->uint64_value))
-      return static_cast<int64_t>(Buff->uint64_value);
-    BENCHMARK_UNREACHABLE();
-  }
-
-  uint64_t GetAsUnsigned() const {
-    if (Size == sizeof(Buff->uint32_value))
-      return Buff->uint32_value;
-    else if (Size == sizeof(Buff->uint64_value))
-      return Buff->uint64_value;
-    BENCHMARK_UNREACHABLE();
-  }
-
-  template <class T, int N>
-  std::array<T, N> GetAsArray() {
-    const int ArrSize = sizeof(T) * N;
-    CHECK_LE(ArrSize, Size);
-    std::array<T, N> Arr;
-    std::memcpy(Arr.data(), data(), ArrSize);
-    return Arr;
-  }
-};
-
-ValueUnion GetSysctlImp(std::string const& Name) {
-#if defined BENCHMARK_OS_OPENBSD
-  int mib[2];
-
-  mib[0] = CTL_HW;
-  if ((Name == "hw.ncpu") || (Name == "hw.cpuspeed")){
-    ValueUnion buff(sizeof(int));
-
-    if (Name == "hw.ncpu") {
-      mib[1] = HW_NCPU;
-    } else {
-      mib[1] = HW_CPUSPEED;
-    }
-
-    if (sysctl(mib, 2, buff.data(), &buff.Size, nullptr, 0) == -1) {
-      return ValueUnion();
-    }
-    return buff;
-  }
-  return ValueUnion();
-#else
-  size_t CurBuffSize = 0;
-  if (sysctlbyname(Name.c_str(), nullptr, &CurBuffSize, nullptr, 0) == -1)
-    return ValueUnion();
-
-  ValueUnion buff(CurBuffSize);
-  if (sysctlbyname(Name.c_str(), buff.data(), &buff.Size, nullptr, 0) == 0)
-    return buff;
-  return ValueUnion();
-#endif
-}
-
-BENCHMARK_MAYBE_UNUSED
-bool GetSysctl(std::string const& Name, std::string* Out) {
-  Out->clear();
-  auto Buff = GetSysctlImp(Name);
-  if (!Buff) return false;
-  Out->assign(Buff.data());
-  return true;
-}
-
-template <class Tp,
-          class = typename std::enable_if<std::is_integral<Tp>::value>::type>
-bool GetSysctl(std::string const& Name, Tp* Out) {
-  *Out = 0;
-  auto Buff = GetSysctlImp(Name);
-  if (!Buff) return false;
-  *Out = static_cast<Tp>(Buff.GetAsUnsigned());
-  return true;
-}
-
-template <class Tp, size_t N>
-bool GetSysctl(std::string const& Name, std::array<Tp, N>* Out) {
-  auto Buff = GetSysctlImp(Name);
-  if (!Buff) return false;
-  *Out = Buff.GetAsArray<Tp, N>();
-  return true;
-}
-#endif
-
-template <class ArgT>
-bool ReadFromFile(std::string const& fname, ArgT* arg) {
-  *arg = ArgT();
-  std::ifstream f(fname.c_str());
-  if (!f.is_open()) return false;
-  f >> *arg;
-  return f.good();
-}
-
-bool CpuScalingEnabled(int num_cpus) {
-  // We don't have a valid CPU count, so don't even bother.
-  if (num_cpus <= 0) return false;
-#ifndef BENCHMARK_OS_WINDOWS
-  // On Linux, the CPUfreq subsystem exposes CPU information as files on the
-  // local file system. If reading the exported files fails, then we may not be
-  // running on Linux, so we silently ignore all the read errors.
-  std::string res;
-  for (int cpu = 0; cpu < num_cpus; ++cpu) {
-    std::string governor_file =
-        StrCat("/sys/devices/system/cpu/cpu", cpu, "/cpufreq/scaling_governor");
-    if (ReadFromFile(governor_file, &res) && res != "performance") return true;
-  }
-#endif
-  return false;
-}
-
-int CountSetBitsInCPUMap(std::string Val) {
-  auto CountBits = [](std::string Part) {
-    using CPUMask = std::bitset<sizeof(std::uintptr_t) * CHAR_BIT>;
-    Part = "0x" + Part;
-    CPUMask Mask(benchmark::stoul(Part, nullptr, 16));
-    return static_cast<int>(Mask.count());
-  };
-  size_t Pos;
-  int total = 0;
-  while ((Pos = Val.find(',')) != std::string::npos) {
-    total += CountBits(Val.substr(0, Pos));
-    Val = Val.substr(Pos + 1);
-  }
-  if (!Val.empty()) {
-    total += CountBits(Val);
-  }
-  return total;
-}
-
-BENCHMARK_MAYBE_UNUSED
-std::vector<CPUInfo::CacheInfo> GetCacheSizesFromKVFS() {
-  std::vector<CPUInfo::CacheInfo> res;
-  std::string dir = "/sys/devices/system/cpu/cpu0/cache/";
-  int Idx = 0;
-  while (true) {
-    CPUInfo::CacheInfo info;
-    std::string FPath = StrCat(dir, "index", Idx++, "/");
-    std::ifstream f(StrCat(FPath, "size").c_str());
-    if (!f.is_open()) break;
-    std::string suffix;
-    f >> info.size;
-    if (f.fail())
-      PrintErrorAndDie("Failed while reading file '", FPath, "size'");
-    if (f.good()) {
-      f >> suffix;
-      if (f.bad())
-        PrintErrorAndDie(
-            "Invalid cache size format: failed to read size suffix");
-      else if (f && suffix != "K")
-        PrintErrorAndDie("Invalid cache size format: Expected bytes ", suffix);
-      else if (suffix == "K")
-        info.size *= 1000;
-    }
-    if (!ReadFromFile(StrCat(FPath, "type"), &info.type))
-      PrintErrorAndDie("Failed to read from file ", FPath, "type");
-    if (!ReadFromFile(StrCat(FPath, "level"), &info.level))
-      PrintErrorAndDie("Failed to read from file ", FPath, "level");
-    std::string map_str;
-    if (!ReadFromFile(StrCat(FPath, "shared_cpu_map"), &map_str))
-      PrintErrorAndDie("Failed to read from file ", FPath, "shared_cpu_map");
-    info.num_sharing = CountSetBitsInCPUMap(map_str);
-    res.push_back(info);
-  }
-
-  return res;
-}
-
-#ifdef BENCHMARK_OS_MACOSX
-std::vector<CPUInfo::CacheInfo> GetCacheSizesMacOSX() {
-  std::vector<CPUInfo::CacheInfo> res;
-  std::array<uint64_t, 4> CacheCounts{{0, 0, 0, 0}};
-  GetSysctl("hw.cacheconfig", &CacheCounts);
-
-  struct {
-    std::string name;
-    std::string type;
-    int level;
-    uint64_t num_sharing;
-  } Cases[] = {{"hw.l1dcachesize", "Data", 1, CacheCounts[1]},
-               {"hw.l1icachesize", "Instruction", 1, CacheCounts[1]},
-               {"hw.l2cachesize", "Unified", 2, CacheCounts[2]},
-               {"hw.l3cachesize", "Unified", 3, CacheCounts[3]}};
-  for (auto& C : Cases) {
-    int val;
-    if (!GetSysctl(C.name, &val)) continue;
-    CPUInfo::CacheInfo info;
-    info.type = C.type;
-    info.level = C.level;
-    info.size = val;
-    info.num_sharing = static_cast<int>(C.num_sharing);
-    res.push_back(std::move(info));
-  }
-  return res;
-}
-#elif defined(BENCHMARK_OS_WINDOWS)
-std::vector<CPUInfo::CacheInfo> GetCacheSizesWindows() {
-  std::vector<CPUInfo::CacheInfo> res;
-  DWORD buffer_size = 0;
-  using PInfo = SYSTEM_LOGICAL_PROCESSOR_INFORMATION;
-  using CInfo = CACHE_DESCRIPTOR;
-
-  using UPtr = std::unique_ptr<PInfo, decltype(&std::free)>;
-  GetLogicalProcessorInformation(nullptr, &buffer_size);
-  UPtr buff((PInfo*)malloc(buffer_size), &std::free);
-  if (!GetLogicalProcessorInformation(buff.get(), &buffer_size))
-    PrintErrorAndDie("Failed during call to GetLogicalProcessorInformation: ",
-                     GetLastError());
-
-  PInfo* it = buff.get();
-  PInfo* end = buff.get() + (buffer_size / sizeof(PInfo));
-
-  for (; it != end; ++it) {
-    if (it->Relationship != RelationCache) continue;
-    using BitSet = std::bitset<sizeof(ULONG_PTR) * CHAR_BIT>;
-    BitSet B(it->ProcessorMask);
-    // To prevent duplicates, only consider caches where CPU 0 is specified
-    if (!B.test(0)) continue;
-    CInfo* Cache = &it->Cache;
-    CPUInfo::CacheInfo C;
-    C.num_sharing = static_cast<int>(B.count());
-    C.level = Cache->Level;
-    C.size = Cache->Size;
-    switch (Cache->Type) {
-      case CacheUnified:
-        C.type = "Unified";
-        break;
-      case CacheInstruction:
-        C.type = "Instruction";
-        break;
-      case CacheData:
-        C.type = "Data";
-        break;
-      case CacheTrace:
-        C.type = "Trace";
-        break;
-      default:
-        C.type = "Unknown";
-        break;
-    }
-    res.push_back(C);
-  }
-  return res;
-}
-#endif
-
-std::vector<CPUInfo::CacheInfo> GetCacheSizes() {
-#ifdef BENCHMARK_OS_MACOSX
-  return GetCacheSizesMacOSX();
-#elif defined(BENCHMARK_OS_WINDOWS)
-  return GetCacheSizesWindows();
-#else
-  return GetCacheSizesFromKVFS();
-#endif
-}
-
-std::string GetSystemName() {
-#if defined(BENCHMARK_OS_WINDOWS)
-  std::string str;
-  const unsigned COUNT = MAX_COMPUTERNAME_LENGTH+1;
-  TCHAR  hostname[COUNT] = {'\0'};
-  DWORD DWCOUNT = COUNT;
-  if (!GetComputerName(hostname, &DWCOUNT))
-    return std::string("");
-#ifndef UNICODE
-  str = std::string(hostname, DWCOUNT);
-#else
-  //Using wstring_convert, Is deprecated in C++17
-  using convert_type = std::codecvt_utf8<wchar_t>;
-  std::wstring_convert<convert_type, wchar_t> converter;
-  std::wstring wStr(hostname, DWCOUNT);
-  str = converter.to_bytes(wStr);
-#endif
-  return str;
-#else // defined(BENCHMARK_OS_WINDOWS)
-#ifdef BENCHMARK_OS_MACOSX //Mac Doesnt have HOST_NAME_MAX defined
-#define HOST_NAME_MAX 64
-#endif
-  char hostname[HOST_NAME_MAX];
-  int retVal = gethostname(hostname, HOST_NAME_MAX);
-  if (retVal != 0) return std::string("");
-  return std::string(hostname);
-#endif // Catch-all POSIX block.
-}
-
-int GetNumCPUs() {
-#ifdef BENCHMARK_HAS_SYSCTL
-  int NumCPU = -1;
-  if (GetSysctl("hw.ncpu", &NumCPU)) return NumCPU;
-  fprintf(stderr, "Err: %s\n", strerror(errno));
-  std::exit(EXIT_FAILURE);
-#elif defined(BENCHMARK_OS_WINDOWS)
-  SYSTEM_INFO sysinfo;
-  // Use memset as opposed to = {} to avoid GCC missing initializer false
-  // positives.
-  std::memset(&sysinfo, 0, sizeof(SYSTEM_INFO));
-  GetSystemInfo(&sysinfo);
-  return sysinfo.dwNumberOfProcessors;  // number of logical
-                                        // processors in the current
-                                        // group
-#elif defined(BENCHMARK_OS_SOLARIS)
-  // Returns -1 in case of a failure.
-  int NumCPU = sysconf(_SC_NPROCESSORS_ONLN);
-  if (NumCPU < 0) {
-    fprintf(stderr,
-            "sysconf(_SC_NPROCESSORS_ONLN) failed with error: %s\n",
-            strerror(errno));
-  }
-  return NumCPU;
-#else
-  int NumCPUs = 0;
-  int MaxID = -1;
-  std::ifstream f("/proc/cpuinfo");
-  if (!f.is_open()) {
-    std::cerr << "failed to open /proc/cpuinfo\n";
-    return -1;
-  }
-  const std::string Key = "processor";
-  std::string ln;
-  while (std::getline(f, ln)) {
-    if (ln.empty()) continue;
-    size_t SplitIdx = ln.find(':');
-    std::string value;
-#if defined(__s390__)
-    // s390 has another format in /proc/cpuinfo
-    // it needs to be parsed differently
-    if (SplitIdx != std::string::npos) value = ln.substr(Key.size()+1,SplitIdx-Key.size()-1);
-#else
-    if (SplitIdx != std::string::npos) value = ln.substr(SplitIdx + 1);
-#endif
-    if (ln.size() >= Key.size() && ln.compare(0, Key.size(), Key) == 0) {
-      NumCPUs++;
-      if (!value.empty()) {
-        int CurID = benchmark::stoi(value);
-        MaxID = std::max(CurID, MaxID);
-      }
-    }
-  }
-  if (f.bad()) {
-    std::cerr << "Failure reading /proc/cpuinfo\n";
-    return -1;
-  }
-  if (!f.eof()) {
-    std::cerr << "Failed to read to end of /proc/cpuinfo\n";
-    return -1;
-  }
-  f.close();
-
-  if ((MaxID + 1) != NumCPUs) {
-    fprintf(stderr,
-            "CPU ID assignments in /proc/cpuinfo seem messed up."
-            " This is usually caused by a bad BIOS.\n");
-  }
-  return NumCPUs;
-#endif
-  BENCHMARK_UNREACHABLE();
-}
-
-double GetCPUCyclesPerSecond() {
-#if defined BENCHMARK_OS_LINUX || defined BENCHMARK_OS_CYGWIN
-  long freq;
-
-  // If the kernel is exporting the tsc frequency use that. There are issues
-  // where cpuinfo_max_freq cannot be relied on because the BIOS may be
-  // exporintg an invalid p-state (on x86) or p-states may be used to put the
-  // processor in a new mode (turbo mode). Essentially, those frequencies
-  // cannot always be relied upon. The same reasons apply to /proc/cpuinfo as
-  // well.
-  if (ReadFromFile("/sys/devices/system/cpu/cpu0/tsc_freq_khz", &freq)
-      // If CPU scaling is in effect, we want to use the *maximum* frequency,
-      // not whatever CPU speed some random processor happens to be using now.
-      || ReadFromFile("/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq",
-                      &freq)) {
-    // The value is in kHz (as the file name suggests).  For example, on a
-    // 2GHz warpstation, the file contains the value "2000000".
-    return freq * 1000.0;
-  }
-
-  const double error_value = -1;
-  double bogo_clock = error_value;
-
-  std::ifstream f("/proc/cpuinfo");
-  if (!f.is_open()) {
-    std::cerr << "failed to open /proc/cpuinfo\n";
-    return error_value;
-  }
-
-  auto startsWithKey = [](std::string const& Value, std::string const& Key) {
-    if (Key.size() > Value.size()) return false;
-    auto Cmp = [&](char X, char Y) {
-      return std::tolower(X) == std::tolower(Y);
-    };
-    return std::equal(Key.begin(), Key.end(), Value.begin(), Cmp);
-  };
-
-  std::string ln;
-  while (std::getline(f, ln)) {
-    if (ln.empty()) continue;
-    size_t SplitIdx = ln.find(':');
-    std::string value;
-    if (SplitIdx != std::string::npos) value = ln.substr(SplitIdx + 1);
-    // When parsing the "cpu MHz" and "bogomips" (fallback) entries, we only
-    // accept positive values. Some environments (virtual machines) report zero,
-    // which would cause infinite looping in WallTime_Init.
-    if (startsWithKey(ln, "cpu MHz")) {
-      if (!value.empty()) {
-        double cycles_per_second = benchmark::stod(value) * 1000000.0;
-        if (cycles_per_second > 0) return cycles_per_second;
-      }
-    } else if (startsWithKey(ln, "bogomips")) {
-      if (!value.empty()) {
-        bogo_clock = benchmark::stod(value) * 1000000.0;
-        if (bogo_clock < 0.0) bogo_clock = error_value;
-      }
-    }
-  }
-  if (f.bad()) {
-    std::cerr << "Failure reading /proc/cpuinfo\n";
-    return error_value;
-  }
-  if (!f.eof()) {
-    std::cerr << "Failed to read to end of /proc/cpuinfo\n";
-    return error_value;
-  }
-  f.close();
-  // If we found the bogomips clock, but nothing better, we'll use it (but
-  // we're not happy about it); otherwise, fallback to the rough estimation
-  // below.
-  if (bogo_clock >= 0.0) return bogo_clock;
-
-#elif defined BENCHMARK_HAS_SYSCTL
-  constexpr auto* FreqStr =
-#if defined(BENCHMARK_OS_FREEBSD) || defined(BENCHMARK_OS_NETBSD)
-      "machdep.tsc_freq";
-#elif defined BENCHMARK_OS_OPENBSD
-      "hw.cpuspeed";
-#else
-      "hw.cpufrequency";
-#endif
-  unsigned long long hz = 0;
-#if defined BENCHMARK_OS_OPENBSD
-  if (GetSysctl(FreqStr, &hz)) return hz * 1000000;
-#else
-  if (GetSysctl(FreqStr, &hz)) return hz;
-#endif
-  fprintf(stderr, "Unable to determine clock rate from sysctl: %s: %s\n",
-          FreqStr, strerror(errno));
-
-#elif defined BENCHMARK_OS_WINDOWS
-  // In NT, read MHz from the registry. If we fail to do so or we're in win9x
-  // then make a crude estimate.
-  DWORD data, data_size = sizeof(data);
-  if (IsWindowsXPOrGreater() &&
-      SUCCEEDED(
-          SHGetValueA(HKEY_LOCAL_MACHINE,
-                      "HARDWARE\\DESCRIPTION\\System\\CentralProcessor\\0",
-                      "~MHz", nullptr, &data, &data_size)))
-    return static_cast<double>((int64_t)data *
-                               (int64_t)(1000 * 1000));  // was mhz
-#elif defined (BENCHMARK_OS_SOLARIS)
-  kstat_ctl_t *kc = kstat_open();
-  if (!kc) {
-    std::cerr << "failed to open /dev/kstat\n";
-    return -1;
-  }
-  kstat_t *ksp = kstat_lookup(kc, (char*)"cpu_info", -1, (char*)"cpu_info0");
-  if (!ksp) {
-    std::cerr << "failed to lookup in /dev/kstat\n";
-    return -1;
-  }
-  if (kstat_read(kc, ksp, NULL) < 0) {
-    std::cerr << "failed to read from /dev/kstat\n";
-    return -1;
-  }
-  kstat_named_t *knp =
-      (kstat_named_t*)kstat_data_lookup(ksp, (char*)"current_clock_Hz");
-  if (!knp) {
-    std::cerr << "failed to lookup data in /dev/kstat\n";
-    return -1;
-  }
-  if (knp->data_type != KSTAT_DATA_UINT64) {
-    std::cerr << "current_clock_Hz is of unexpected data type: "
-              << knp->data_type << "\n";
-    return -1;
-  }
-  double clock_hz = knp->value.ui64;
-  kstat_close(kc);
-  return clock_hz;
-#endif
-  // If we've fallen through, attempt to roughly estimate the CPU clock rate.
-  const int estimate_time_ms = 1000;
-  const auto start_ticks = cycleclock::Now();
-  SleepForMilliseconds(estimate_time_ms);
-  return static_cast<double>(cycleclock::Now() - start_ticks);
-}
-
-std::vector<double> GetLoadAvg() {
-#if defined BENCHMARK_OS_FREEBSD || defined(BENCHMARK_OS_LINUX) || \
-    defined BENCHMARK_OS_MACOSX || defined BENCHMARK_OS_NETBSD ||  \
-    defined BENCHMARK_OS_OPENBSD
-  constexpr int kMaxSamples = 3;
-  std::vector<double> res(kMaxSamples, 0.0);
-  const int nelem = getloadavg(res.data(), kMaxSamples);
-  if (nelem < 1) {
-    res.clear();
-  } else {
-    res.resize(nelem);
-  }
-  return res;
-#else
-  return {};
-#endif
-}
-
-}  // end namespace
-
-const CPUInfo& CPUInfo::Get() {
-  static const CPUInfo* info = new CPUInfo();
-  return *info;
-}
-
-CPUInfo::CPUInfo()
-    : num_cpus(GetNumCPUs()),
-      cycles_per_second(GetCPUCyclesPerSecond()),
-      caches(GetCacheSizes()),
-      scaling_enabled(CpuScalingEnabled(num_cpus)),
-      load_avg(GetLoadAvg()) {}
-
-
-const SystemInfo& SystemInfo::Get() {
-  static const SystemInfo* info = new SystemInfo();
-  return *info;
-}
-
-SystemInfo::SystemInfo() : name(GetSystemName()) {}
-}  // end namespace benchmark
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/src/thread_manager.h b/gnu/llvm/libcxx/utils/google-benchmark/src/thread_manager.h
deleted file mode 100644
index 6e274c7ea6b..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/src/thread_manager.h
+++ /dev/null
@@ -1,64 +0,0 @@
-#ifndef BENCHMARK_THREAD_MANAGER_H
-#define BENCHMARK_THREAD_MANAGER_H
-
-#include <atomic>
-
-#include "benchmark/benchmark.h"
-#include "mutex.h"
-
-namespace benchmark {
-namespace internal {
-
-class ThreadManager {
- public:
-  ThreadManager(int num_threads)
-      : alive_threads_(num_threads), start_stop_barrier_(num_threads) {}
-
-  Mutex& GetBenchmarkMutex() const RETURN_CAPABILITY(benchmark_mutex_) {
-    return benchmark_mutex_;
-  }
-
-  bool StartStopBarrier() EXCLUDES(end_cond_mutex_) {
-    return start_stop_barrier_.wait();
-  }
-
-  void NotifyThreadComplete() EXCLUDES(end_cond_mutex_) {
-    start_stop_barrier_.removeThread();
-    if (--alive_threads_ == 0) {
-      MutexLock lock(end_cond_mutex_);
-      end_condition_.notify_all();
-    }
-  }
-
-  void WaitForAllThreads() EXCLUDES(end_cond_mutex_) {
-    MutexLock lock(end_cond_mutex_);
-    end_condition_.wait(lock.native_handle(),
-                        [this]() { return alive_threads_ == 0; });
-  }
-
- public:
-  struct Result {
-    int64_t iterations = 0;
-    double real_time_used = 0;
-    double cpu_time_used = 0;
-    double manual_time_used = 0;
-    int64_t complexity_n = 0;
-    std::string report_label_;
-    std::string error_message_;
-    bool has_error_ = false;
-    UserCounters counters;
-  };
-  GUARDED_BY(GetBenchmarkMutex()) Result results;
-
- private:
-  mutable Mutex benchmark_mutex_;
-  std::atomic<int> alive_threads_;
-  Barrier start_stop_barrier_;
-  Mutex end_cond_mutex_;
-  Condition end_condition_;
-};
-
-}  // namespace internal
-}  // namespace benchmark
-
-#endif  // BENCHMARK_THREAD_MANAGER_H
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/src/thread_timer.h b/gnu/llvm/libcxx/utils/google-benchmark/src/thread_timer.h
deleted file mode 100644
index eaf108e017d..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/src/thread_timer.h
+++ /dev/null
@@ -1,69 +0,0 @@
-#ifndef BENCHMARK_THREAD_TIMER_H
-#define BENCHMARK_THREAD_TIMER_H
-
-#include "check.h"
-#include "timers.h"
-
-namespace benchmark {
-namespace internal {
-
-class ThreadTimer {
- public:
-  ThreadTimer() = default;
-
-  // Called by each thread
-  void StartTimer() {
-    running_ = true;
-    start_real_time_ = ChronoClockNow();
-    start_cpu_time_ = ThreadCPUUsage();
-  }
-
-  // Called by each thread
-  void StopTimer() {
-    CHECK(running_);
-    running_ = false;
-    real_time_used_ += ChronoClockNow() - start_real_time_;
-    // Floating point error can result in the subtraction producing a negative
-    // time. Guard against that.
-    cpu_time_used_ += std::max<double>(ThreadCPUUsage() - start_cpu_time_, 0);
-  }
-
-  // Called by each thread
-  void SetIterationTime(double seconds) { manual_time_used_ += seconds; }
-
-  bool running() const { return running_; }
-
-  // REQUIRES: timer is not running
-  double real_time_used() {
-    CHECK(!running_);
-    return real_time_used_;
-  }
-
-  // REQUIRES: timer is not running
-  double cpu_time_used() {
-    CHECK(!running_);
-    return cpu_time_used_;
-  }
-
-  // REQUIRES: timer is not running
-  double manual_time_used() {
-    CHECK(!running_);
-    return manual_time_used_;
-  }
-
- private:
-  bool running_ = false;        // Is the timer running
-  double start_real_time_ = 0;  // If running_
-  double start_cpu_time_ = 0;   // If running_
-
-  // Accumulated time so far (does not contain current slice if running_)
-  double real_time_used_ = 0;
-  double cpu_time_used_ = 0;
-  // Manually set iteration time. User sets this with SetIterationTime(seconds).
-  double manual_time_used_ = 0;
-};
-
-}  // namespace internal
-}  // namespace benchmark
-
-#endif  // BENCHMARK_THREAD_TIMER_H
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/src/timers.cc b/gnu/llvm/libcxx/utils/google-benchmark/src/timers.cc
deleted file mode 100644
index 7613ff92c6e..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/src/timers.cc
+++ /dev/null
@@ -1,217 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "timers.h"
-#include "internal_macros.h"
-
-#ifdef BENCHMARK_OS_WINDOWS
-#include <shlwapi.h>
-#undef StrCat  // Don't let StrCat in string_util.h be renamed to lstrcatA
-#include <versionhelpers.h>
-#include <windows.h>
-#else
-#include <fcntl.h>
-#ifndef BENCHMARK_OS_FUCHSIA
-#include <sys/resource.h>
-#endif
-#include <sys/time.h>
-#include <sys/types.h>  // this header must be included before 'sys/sysctl.h' to avoid compilation error on FreeBSD
-#include <unistd.h>
-#if defined BENCHMARK_OS_FREEBSD || defined BENCHMARK_OS_MACOSX
-#include <sys/sysctl.h>
-#endif
-#if defined(BENCHMARK_OS_MACOSX)
-#include <mach/mach_init.h>
-#include <mach/mach_port.h>
-#include <mach/thread_act.h>
-#endif
-#endif
-
-#ifdef BENCHMARK_OS_EMSCRIPTEN
-#include <emscripten.h>
-#endif
-
-#include <cerrno>
-#include <cstdint>
-#include <cstdio>
-#include <cstdlib>
-#include <cstring>
-#include <ctime>
-#include <iostream>
-#include <limits>
-#include <mutex>
-
-#include "check.h"
-#include "log.h"
-#include "sleep.h"
-#include "string_util.h"
-
-namespace benchmark {
-
-// Suppress unused warnings on helper functions.
-#if defined(__GNUC__)
-#pragma GCC diagnostic ignored "-Wunused-function"
-#endif
-
-namespace {
-#if defined(BENCHMARK_OS_WINDOWS)
-double MakeTime(FILETIME const& kernel_time, FILETIME const& user_time) {
-  ULARGE_INTEGER kernel;
-  ULARGE_INTEGER user;
-  kernel.HighPart = kernel_time.dwHighDateTime;
-  kernel.LowPart = kernel_time.dwLowDateTime;
-  user.HighPart = user_time.dwHighDateTime;
-  user.LowPart = user_time.dwLowDateTime;
-  return (static_cast<double>(kernel.QuadPart) +
-          static_cast<double>(user.QuadPart)) *
-         1e-7;
-}
-#elif !defined(BENCHMARK_OS_FUCHSIA)
-double MakeTime(struct rusage const& ru) {
-  return (static_cast<double>(ru.ru_utime.tv_sec) +
-          static_cast<double>(ru.ru_utime.tv_usec) * 1e-6 +
-          static_cast<double>(ru.ru_stime.tv_sec) +
-          static_cast<double>(ru.ru_stime.tv_usec) * 1e-6);
-}
-#endif
-#if defined(BENCHMARK_OS_MACOSX)
-double MakeTime(thread_basic_info_data_t const& info) {
-  return (static_cast<double>(info.user_time.seconds) +
-          static_cast<double>(info.user_time.microseconds) * 1e-6 +
-          static_cast<double>(info.system_time.seconds) +
-          static_cast<double>(info.system_time.microseconds) * 1e-6);
-}
-#endif
-#if defined(CLOCK_PROCESS_CPUTIME_ID) || defined(CLOCK_THREAD_CPUTIME_ID)
-double MakeTime(struct timespec const& ts) {
-  return ts.tv_sec + (static_cast<double>(ts.tv_nsec) * 1e-9);
-}
-#endif
-
-BENCHMARK_NORETURN static void DiagnoseAndExit(const char* msg) {
-  std::cerr << "ERROR: " << msg << std::endl;
-  std::exit(EXIT_FAILURE);
-}
-
-}  // end namespace
-
-double ProcessCPUUsage() {
-#if defined(BENCHMARK_OS_WINDOWS)
-  HANDLE proc = GetCurrentProcess();
-  FILETIME creation_time;
-  FILETIME exit_time;
-  FILETIME kernel_time;
-  FILETIME user_time;
-  if (GetProcessTimes(proc, &creation_time, &exit_time, &kernel_time,
-                      &user_time))
-    return MakeTime(kernel_time, user_time);
-  DiagnoseAndExit("GetProccessTimes() failed");
-#elif defined(BENCHMARK_OS_EMSCRIPTEN)
-  // clock_gettime(CLOCK_PROCESS_CPUTIME_ID, ...) returns 0 on Emscripten.
-  // Use Emscripten-specific API. Reported CPU time would be exactly the
-  // same as total time, but this is ok because there aren't long-latency
-  // syncronous system calls in Emscripten.
-  return emscripten_get_now() * 1e-3;
-#elif defined(CLOCK_PROCESS_CPUTIME_ID) && !defined(BENCHMARK_OS_MACOSX)
-  // FIXME We want to use clock_gettime, but its not available in MacOS 10.11. See
-  // https://github.com/google/benchmark/pull/292
-  struct timespec spec;
-  if (clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &spec) == 0)
-    return MakeTime(spec);
-  DiagnoseAndExit("clock_gettime(CLOCK_PROCESS_CPUTIME_ID, ...) failed");
-#else
-  struct rusage ru;
-  if (getrusage(RUSAGE_SELF, &ru) == 0) return MakeTime(ru);
-  DiagnoseAndExit("getrusage(RUSAGE_SELF, ...) failed");
-#endif
-}
-
-double ThreadCPUUsage() {
-#if defined(BENCHMARK_OS_WINDOWS)
-  HANDLE this_thread = GetCurrentThread();
-  FILETIME creation_time;
-  FILETIME exit_time;
-  FILETIME kernel_time;
-  FILETIME user_time;
-  GetThreadTimes(this_thread, &creation_time, &exit_time, &kernel_time,
-                 &user_time);
-  return MakeTime(kernel_time, user_time);
-#elif defined(BENCHMARK_OS_MACOSX)
-  // FIXME We want to use clock_gettime, but its not available in MacOS 10.11. See
-  // https://github.com/google/benchmark/pull/292
-  mach_msg_type_number_t count = THREAD_BASIC_INFO_COUNT;
-  thread_basic_info_data_t info;
-  mach_port_t thread = pthread_mach_thread_np(pthread_self());
-  if (thread_info(thread, THREAD_BASIC_INFO, (thread_info_t)&info, &count) ==
-      KERN_SUCCESS) {
-    return MakeTime(info);
-  }
-  DiagnoseAndExit("ThreadCPUUsage() failed when evaluating thread_info");
-#elif defined(BENCHMARK_OS_EMSCRIPTEN)
-  // Emscripten doesn't support traditional threads
-  return ProcessCPUUsage();
-#elif defined(BENCHMARK_OS_RTEMS)
-  // RTEMS doesn't support CLOCK_THREAD_CPUTIME_ID. See
-  // https://github.com/RTEMS/rtems/blob/master/cpukit/posix/src/clockgettime.c
-  return ProcessCPUUsage();
-#elif defined(BENCHMARK_OS_SOLARIS)
-  struct rusage ru;
-  if (getrusage(RUSAGE_LWP, &ru) == 0) return MakeTime(ru);
-  DiagnoseAndExit("getrusage(RUSAGE_LWP, ...) failed");
-#elif defined(CLOCK_THREAD_CPUTIME_ID)
-  struct timespec ts;
-  if (clock_gettime(CLOCK_THREAD_CPUTIME_ID, &ts) == 0) return MakeTime(ts);
-  DiagnoseAndExit("clock_gettime(CLOCK_THREAD_CPUTIME_ID, ...) failed");
-#else
-#error Per-thread timing is not available on your system.
-#endif
-}
-
-namespace {
-
-std::string DateTimeString(bool local) {
-  typedef std::chrono::system_clock Clock;
-  std::time_t now = Clock::to_time_t(Clock::now());
-  const std::size_t kStorageSize = 128;
-  char storage[kStorageSize];
-  std::size_t written;
-
-  if (local) {
-#if defined(BENCHMARK_OS_WINDOWS)
-    written =
-        std::strftime(storage, sizeof(storage), "%x %X", ::localtime(&now));
-#else
-    std::tm timeinfo;
-    ::localtime_r(&now, &timeinfo);
-    written = std::strftime(storage, sizeof(storage), "%F %T", &timeinfo);
-#endif
-  } else {
-#if defined(BENCHMARK_OS_WINDOWS)
-    written = std::strftime(storage, sizeof(storage), "%x %X", ::gmtime(&now));
-#else
-    std::tm timeinfo;
-    ::gmtime_r(&now, &timeinfo);
-    written = std::strftime(storage, sizeof(storage), "%F %T", &timeinfo);
-#endif
-  }
-  CHECK(written < kStorageSize);
-  ((void)written);  // prevent unused variable in optimized mode.
-  return std::string(storage);
-}
-
-}  // end namespace
-
-std::string LocalDateTimeString() { return DateTimeString(true); }
-
-}  // end namespace benchmark
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/src/timers.h b/gnu/llvm/libcxx/utils/google-benchmark/src/timers.h
deleted file mode 100644
index 65606ccd93d..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/src/timers.h
+++ /dev/null
@@ -1,48 +0,0 @@
-#ifndef BENCHMARK_TIMERS_H
-#define BENCHMARK_TIMERS_H
-
-#include <chrono>
-#include <string>
-
-namespace benchmark {
-
-// Return the CPU usage of the current process
-double ProcessCPUUsage();
-
-// Return the CPU usage of the children of the current process
-double ChildrenCPUUsage();
-
-// Return the CPU usage of the current thread
-double ThreadCPUUsage();
-
-#if defined(HAVE_STEADY_CLOCK)
-template <bool HighResIsSteady = std::chrono::high_resolution_clock::is_steady>
-struct ChooseSteadyClock {
-  typedef std::chrono::high_resolution_clock type;
-};
-
-template <>
-struct ChooseSteadyClock<false> {
-  typedef std::chrono::steady_clock type;
-};
-#endif
-
-struct ChooseClockType {
-#if defined(HAVE_STEADY_CLOCK)
-  typedef ChooseSteadyClock<>::type type;
-#else
-  typedef std::chrono::high_resolution_clock type;
-#endif
-};
-
-inline double ChronoClockNow() {
-  typedef ChooseClockType::type ClockType;
-  using FpSeconds = std::chrono::duration<double, std::chrono::seconds::period>;
-  return FpSeconds(ClockType::now().time_since_epoch()).count();
-}
-
-std::string LocalDateTimeString();
-
-}  // end namespace benchmark
-
-#endif  // BENCHMARK_TIMERS_H
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/test/AssemblyTests.cmake b/gnu/llvm/libcxx/utils/google-benchmark/test/AssemblyTests.cmake
deleted file mode 100644
index 8605221ff71..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/test/AssemblyTests.cmake
+++ /dev/null
@@ -1,45 +0,0 @@
-
-include(split_list)
-
-set(ASM_TEST_FLAGS "")
-check_cxx_compiler_flag(-O3 BENCHMARK_HAS_O3_FLAG)
-if (BENCHMARK_HAS_O3_FLAG)
-  list(APPEND ASM_TEST_FLAGS -O3)
-endif()
-
-check_cxx_compiler_flag(-g0 BENCHMARK_HAS_G0_FLAG)
-if (BENCHMARK_HAS_G0_FLAG)
-  list(APPEND ASM_TEST_FLAGS -g0)
-endif()
-
-check_cxx_compiler_flag(-fno-stack-protector BENCHMARK_HAS_FNO_STACK_PROTECTOR_FLAG)
-if (BENCHMARK_HAS_FNO_STACK_PROTECTOR_FLAG)
-  list(APPEND ASM_TEST_FLAGS -fno-stack-protector)
-endif()
-
-split_list(ASM_TEST_FLAGS)
-string(TOUPPER "${CMAKE_CXX_COMPILER_ID}" ASM_TEST_COMPILER)
-
-macro(add_filecheck_test name)
-  cmake_parse_arguments(ARG "" "" "CHECK_PREFIXES" ${ARGV})
-  add_library(${name} OBJECT ${name}.cc)
-  set_target_properties(${name} PROPERTIES COMPILE_FLAGS "-S ${ASM_TEST_FLAGS}")
-  set(ASM_OUTPUT_FILE "${CMAKE_CURRENT_BINARY_DIR}/${name}.s")
-  add_custom_target(copy_${name} ALL
-      COMMAND ${PROJECT_SOURCE_DIR}/tools/strip_asm.py
-        $<TARGET_OBJECTS:${name}>
-        ${ASM_OUTPUT_FILE}
-      BYPRODUCTS ${ASM_OUTPUT_FILE})
-  add_dependencies(copy_${name} ${name})
-  if (NOT ARG_CHECK_PREFIXES)
-    set(ARG_CHECK_PREFIXES "CHECK")
-  endif()
-  foreach(prefix ${ARG_CHECK_PREFIXES})
-    add_test(NAME run_${name}_${prefix}
-        COMMAND
-          ${LLVM_FILECHECK_EXE} ${name}.cc
-          --input-file=${ASM_OUTPUT_FILE}
-          --check-prefixes=CHECK,CHECK-${ASM_TEST_COMPILER}
-        WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
-  endforeach()
-endmacro()
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/test/BUILD b/gnu/llvm/libcxx/utils/google-benchmark/test/BUILD
deleted file mode 100644
index 1f27f99ede9..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/test/BUILD
+++ /dev/null
@@ -1,74 +0,0 @@
-TEST_COPTS = [
-    "-pedantic",
-    "-pedantic-errors",
-    "-std=c++11",
-    "-Wall",
-    "-Wextra",
-    "-Wshadow",
-    #    "-Wshorten-64-to-32",
-    "-Wfloat-equal",
-    "-fstrict-aliasing",
-]
-
-PER_SRC_COPTS = ({
-    "cxx03_test.cc": ["-std=c++03"],
-    # Some of the issues with DoNotOptimize only occur when optimization is enabled
-    "donotoptimize_test.cc": ["-O3"],
-})
-
-TEST_ARGS = ["--benchmark_min_time=0.01"]
-
-PER_SRC_TEST_ARGS = ({
-    "user_counters_tabular_test.cc": ["--benchmark_counters_tabular=true"],
-    "repetitions_test.cc": [" --benchmark_repetitions=3"],
-})
-
-load("@rules_cc//cc:defs.bzl", "cc_library", "cc_test")
-
-cc_library(
-    name = "output_test_helper",
-    testonly = 1,
-    srcs = ["output_test_helper.cc"],
-    hdrs = ["output_test.h"],
-    copts = TEST_COPTS,
-    deps = [
-        "//:benchmark",
-        "//:benchmark_internal_headers",
-    ],
-)
-
-[
-    cc_test(
-        name = test_src[:-len(".cc")],
-        size = "small",
-        srcs = [test_src],
-        args = TEST_ARGS + PER_SRC_TEST_ARGS.get(test_src, []),
-        copts = TEST_COPTS + PER_SRC_COPTS.get(test_src, []),
-        deps = [
-            ":output_test_helper",
-            "//:benchmark",
-            "//:benchmark_internal_headers",
-            "@com_google_googletest//:gtest",
-        ] + (
-            ["@com_google_googletest//:gtest_main"] if (test_src[-len("gtest.cc"):] == "gtest.cc") else []
-        ),
-        # FIXME: Add support for assembly tests to bazel.
-        # See Issue #556
-        # https://github.com/google/benchmark/issues/556
-    )
-    for test_src in glob(
-        ["*test.cc"],
-        exclude = [
-            "*_assembly_test.cc",
-            "link_main_test.cc",
-        ],
-    )
-]
-
-cc_test(
-    name = "link_main_test",
-    size = "small",
-    srcs = ["link_main_test.cc"],
-    copts = TEST_COPTS,
-    deps = ["//:benchmark_main"],
-)
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/test/CMakeLists.txt b/gnu/llvm/libcxx/utils/google-benchmark/test/CMakeLists.txt
deleted file mode 100644
index f15ce208189..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/test/CMakeLists.txt
+++ /dev/null
@@ -1,260 +0,0 @@
-# Enable the tests
-
-find_package(Threads REQUIRED)
-include(CheckCXXCompilerFlag)
-
-# NOTE: Some tests use `<cassert>` to perform the test. Therefore we must
-# strip -DNDEBUG from the default CMake flags in DEBUG mode.
-string(TOUPPER "${CMAKE_BUILD_TYPE}" uppercase_CMAKE_BUILD_TYPE)
-if( NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG" )
-  add_definitions( -UNDEBUG )
-  add_definitions(-DTEST_BENCHMARK_LIBRARY_HAS_NO_ASSERTIONS)
-  # Also remove /D NDEBUG to avoid MSVC warnings about conflicting defines.
-  foreach (flags_var_to_scrub
-      CMAKE_CXX_FLAGS_RELEASE
-      CMAKE_CXX_FLAGS_RELWITHDEBINFO
-      CMAKE_CXX_FLAGS_MINSIZEREL
-      CMAKE_C_FLAGS_RELEASE
-      CMAKE_C_FLAGS_RELWITHDEBINFO
-      CMAKE_C_FLAGS_MINSIZEREL)
-    string (REGEX REPLACE "(^| )[/-]D *NDEBUG($| )" " "
-      "${flags_var_to_scrub}" "${${flags_var_to_scrub}}")
-  endforeach()
-endif()
-
-check_cxx_compiler_flag(-O3 BENCHMARK_HAS_O3_FLAG)
-set(BENCHMARK_O3_FLAG "")
-if (BENCHMARK_HAS_O3_FLAG)
-  set(BENCHMARK_O3_FLAG "-O3")
-endif()
-
-# NOTE: These flags must be added after find_package(Threads REQUIRED) otherwise
-# they will break the configuration check.
-if (DEFINED BENCHMARK_CXX_LINKER_FLAGS)
-  list(APPEND CMAKE_EXE_LINKER_FLAGS ${BENCHMARK_CXX_LINKER_FLAGS})
-endif()
-
-add_library(output_test_helper STATIC output_test_helper.cc output_test.h)
-
-macro(compile_benchmark_test name)
-  add_executable(${name} "${name}.cc")
-  target_link_libraries(${name} benchmark ${CMAKE_THREAD_LIBS_INIT})
-endmacro(compile_benchmark_test)
-
-macro(compile_benchmark_test_with_main name)
-  add_executable(${name} "${name}.cc")
-  target_link_libraries(${name} benchmark_main)
-endmacro(compile_benchmark_test_with_main)
-
-macro(compile_output_test name)
-  add_executable(${name} "${name}.cc" output_test.h)
-  target_link_libraries(${name} output_test_helper benchmark
-          ${BENCHMARK_CXX_LIBRARIES} ${CMAKE_THREAD_LIBS_INIT})
-endmacro(compile_output_test)
-
-# Demonstration executable
-compile_benchmark_test(benchmark_test)
-add_test(benchmark benchmark_test --benchmark_min_time=0.01)
-
-compile_benchmark_test(filter_test)
-macro(add_filter_test name filter expect)
-  add_test(${name} filter_test --benchmark_min_time=0.01 --benchmark_filter=${filter} ${expect})
-  add_test(${name}_list_only filter_test --benchmark_list_tests --benchmark_filter=${filter} ${expect})
-endmacro(add_filter_test)
-
-add_filter_test(filter_simple "Foo" 3)
-add_filter_test(filter_simple_negative "-Foo" 2)
-add_filter_test(filter_suffix "BM_.*" 4)
-add_filter_test(filter_suffix_negative "-BM_.*" 1)
-add_filter_test(filter_regex_all ".*" 5)
-add_filter_test(filter_regex_all_negative "-.*" 0)
-add_filter_test(filter_regex_blank "" 5)
-add_filter_test(filter_regex_blank_negative "-" 0)
-add_filter_test(filter_regex_none "monkey" 0)
-add_filter_test(filter_regex_none_negative "-monkey" 5)
-add_filter_test(filter_regex_wildcard ".*Foo.*" 3)
-add_filter_test(filter_regex_wildcard_negative "-.*Foo.*" 2)
-add_filter_test(filter_regex_begin "^BM_.*" 4)
-add_filter_test(filter_regex_begin_negative "-^BM_.*" 1)
-add_filter_test(filter_regex_begin2 "^N" 1)
-add_filter_test(filter_regex_begin2_negative "-^N" 4)
-add_filter_test(filter_regex_end ".*Ba$" 1)
-add_filter_test(filter_regex_end_negative "-.*Ba$" 4)
-
-compile_benchmark_test(options_test)
-add_test(options_benchmarks options_test --benchmark_min_time=0.01)
-
-compile_benchmark_test(basic_test)
-add_test(basic_benchmark basic_test --benchmark_min_time=0.01)
-
-compile_benchmark_test(diagnostics_test)
-add_test(diagnostics_test diagnostics_test --benchmark_min_time=0.01)
-
-compile_benchmark_test(skip_with_error_test)
-add_test(skip_with_error_test skip_with_error_test --benchmark_min_time=0.01)
-
-compile_benchmark_test(donotoptimize_test)
-# Some of the issues with DoNotOptimize only occur when optimization is enabled
-check_cxx_compiler_flag(-O3 BENCHMARK_HAS_O3_FLAG)
-if (BENCHMARK_HAS_O3_FLAG)
-  set_target_properties(donotoptimize_test PROPERTIES COMPILE_FLAGS "-O3")
-endif()
-add_test(donotoptimize_test donotoptimize_test --benchmark_min_time=0.01)
-
-compile_benchmark_test(fixture_test)
-add_test(fixture_test fixture_test --benchmark_min_time=0.01)
-
-compile_benchmark_test(register_benchmark_test)
-add_test(register_benchmark_test register_benchmark_test --benchmark_min_time=0.01)
-
-compile_benchmark_test(map_test)
-add_test(map_test map_test --benchmark_min_time=0.01)
-
-compile_benchmark_test(multiple_ranges_test)
-add_test(multiple_ranges_test multiple_ranges_test --benchmark_min_time=0.01)
-
-compile_benchmark_test_with_main(link_main_test)
-add_test(link_main_test link_main_test --benchmark_min_time=0.01)
-
-compile_output_test(reporter_output_test)
-add_test(reporter_output_test reporter_output_test --benchmark_min_time=0.01)
-
-compile_output_test(templated_fixture_test)
-add_test(templated_fixture_test templated_fixture_test --benchmark_min_time=0.01)
-
-compile_output_test(user_counters_test)
-add_test(user_counters_test user_counters_test --benchmark_min_time=0.01)
-
-compile_output_test(report_aggregates_only_test)
-add_test(report_aggregates_only_test report_aggregates_only_test --benchmark_min_time=0.01)
-
-compile_output_test(display_aggregates_only_test)
-add_test(display_aggregates_only_test display_aggregates_only_test --benchmark_min_time=0.01)
-
-compile_output_test(user_counters_tabular_test)
-add_test(user_counters_tabular_test user_counters_tabular_test --benchmark_counters_tabular=true --benchmark_min_time=0.01)
-
-compile_output_test(user_counters_thousands_test)
-add_test(user_counters_thousands_test user_counters_thousands_test --benchmark_min_time=0.01)
-
-compile_output_test(memory_manager_test)
-add_test(memory_manager_test memory_manager_test --benchmark_min_time=0.01)
-
-check_cxx_compiler_flag(-std=c++03 BENCHMARK_HAS_CXX03_FLAG)
-if (BENCHMARK_HAS_CXX03_FLAG)
-  compile_benchmark_test(cxx03_test)
-  set_target_properties(cxx03_test
-      PROPERTIES
-      COMPILE_FLAGS "-std=c++03")
-  # libstdc++ provides different definitions within <map> between dialects. When
-  # LTO is enabled and -Werror is specified GCC diagnoses this ODR violation
-  # causing the test to fail to compile. To prevent this we explicitly disable
-  # the warning.
-  check_cxx_compiler_flag(-Wno-odr BENCHMARK_HAS_WNO_ODR)
-  if (BENCHMARK_ENABLE_LTO AND BENCHMARK_HAS_WNO_ODR)
-    set_target_properties(cxx03_test
-        PROPERTIES
-        LINK_FLAGS "-Wno-odr")
-  endif()
-  add_test(cxx03 cxx03_test --benchmark_min_time=0.01)
-endif()
-
-# Attempt to work around flaky test failures when running on Appveyor servers.
-if (DEFINED ENV{APPVEYOR})
-  set(COMPLEXITY_MIN_TIME "0.5")
-else()
-  set(COMPLEXITY_MIN_TIME "0.01")
-endif()
-compile_output_test(complexity_test)
-add_test(complexity_benchmark complexity_test --benchmark_min_time=${COMPLEXITY_MIN_TIME})
-
-###############################################################################
-# GoogleTest Unit Tests
-###############################################################################
-
-if (BENCHMARK_ENABLE_GTEST_TESTS)
-  macro(compile_gtest name)
-    add_executable(${name} "${name}.cc")
-    if (TARGET googletest)
-      add_dependencies(${name} googletest)
-    endif()
-    if (GTEST_INCLUDE_DIRS)
-      target_include_directories(${name} PRIVATE ${GTEST_INCLUDE_DIRS})
-    endif()
-    target_link_libraries(${name} benchmark
-        ${GTEST_BOTH_LIBRARIES} ${CMAKE_THREAD_LIBS_INIT})
-  endmacro(compile_gtest)
-
-  macro(add_gtest name)
-    compile_gtest(${name})
-    add_test(${name} ${name})
-  endmacro()
-
-  add_gtest(benchmark_gtest)
-  add_gtest(statistics_gtest)
-  add_gtest(string_util_gtest)
-endif(BENCHMARK_ENABLE_GTEST_TESTS)
-
-###############################################################################
-# Assembly Unit Tests
-###############################################################################
-
-if (BENCHMARK_ENABLE_ASSEMBLY_TESTS)
-  if (NOT LLVM_FILECHECK_EXE)
-    message(FATAL_ERROR "LLVM FileCheck is required when including this file")
-  endif()
-  include(AssemblyTests.cmake)
-  add_filecheck_test(donotoptimize_assembly_test)
-  add_filecheck_test(state_assembly_test)
-  add_filecheck_test(clobber_memory_assembly_test)
-endif()
-
-
-
-###############################################################################
-# Code Coverage Configuration
-###############################################################################
-
-# Add the coverage command(s)
-if(CMAKE_BUILD_TYPE)
-  string(TOLOWER ${CMAKE_BUILD_TYPE} CMAKE_BUILD_TYPE_LOWER)
-endif()
-if (${CMAKE_BUILD_TYPE_LOWER} MATCHES "coverage")
-  find_program(GCOV gcov)
-  find_program(LCOV lcov)
-  find_program(GENHTML genhtml)
-  find_program(CTEST ctest)
-  if (GCOV AND LCOV AND GENHTML AND CTEST AND HAVE_CXX_FLAG_COVERAGE)
-    add_custom_command(
-      OUTPUT ${CMAKE_BINARY_DIR}/lcov/index.html
-      COMMAND ${LCOV} -q -z -d .
-      COMMAND ${LCOV} -q --no-external -c -b "${CMAKE_SOURCE_DIR}" -d . -o before.lcov -i
-      COMMAND ${CTEST} --force-new-ctest-process
-      COMMAND ${LCOV} -q --no-external -c -b "${CMAKE_SOURCE_DIR}" -d . -o after.lcov
-      COMMAND ${LCOV} -q -a before.lcov -a after.lcov --output-file final.lcov
-      COMMAND ${LCOV} -q -r final.lcov "'${CMAKE_SOURCE_DIR}/test/*'" -o final.lcov
-      COMMAND ${GENHTML} final.lcov -o lcov --demangle-cpp --sort -p "${CMAKE_BINARY_DIR}" -t benchmark
-      DEPENDS filter_test benchmark_test options_test basic_test fixture_test cxx03_test complexity_test
-      WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
-      COMMENT "Running LCOV"
-    )
-    add_custom_target(coverage
-      DEPENDS ${CMAKE_BINARY_DIR}/lcov/index.html
-      COMMENT "LCOV report at lcov/index.html"
-    )
-    message(STATUS "Coverage command added")
-  else()
-    if (HAVE_CXX_FLAG_COVERAGE)
-      set(CXX_FLAG_COVERAGE_MESSAGE supported)
-    else()
-      set(CXX_FLAG_COVERAGE_MESSAGE unavailable)
-    endif()
-    message(WARNING
-      "Coverage not available:\n"
-      "  gcov: ${GCOV}\n"
-      "  lcov: ${LCOV}\n"
-      "  genhtml: ${GENHTML}\n"
-      "  ctest: ${CTEST}\n"
-      "  --coverage flag: ${CXX_FLAG_COVERAGE_MESSAGE}")
-  endif()
-endif()
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/test/args_product_test.cc b/gnu/llvm/libcxx/utils/google-benchmark/test/args_product_test.cc
deleted file mode 100644
index 32a75d50dd9..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/test/args_product_test.cc
+++ /dev/null
@@ -1,77 +0,0 @@
-#include "benchmark/benchmark.h"
-
-#include <cassert>
-#include <iostream>
-#include <set>
-#include <vector>
-
-class ArgsProductFixture : public ::benchmark::Fixture {
- public:
-  ArgsProductFixture()
-      : expectedValues({{0, 100, 2000, 30000},
-                        {1, 15, 3, 8},
-                        {1, 15, 3, 9},
-                        {1, 15, 7, 8},
-                        {1, 15, 7, 9},
-                        {1, 15, 10, 8},
-                        {1, 15, 10, 9},
-                        {2, 15, 3, 8},
-                        {2, 15, 3, 9},
-                        {2, 15, 7, 8},
-                        {2, 15, 7, 9},
-                        {2, 15, 10, 8},
-                        {2, 15, 10, 9},
-                        {4, 5, 6, 11}}) {}
-
-  void SetUp(const ::benchmark::State& state) BENCHMARK_OVERRIDE {
-    std::vector<int64_t> ranges = {state.range(0), state.range(1),
-                                   state.range(2), state.range(3)};
-
-    assert(expectedValues.find(ranges) != expectedValues.end());
-
-    actualValues.insert(ranges);
-  }
-
-  // NOTE: This is not TearDown as we want to check after _all_ runs are
-  // complete.
-  virtual ~ArgsProductFixture() {
-    if (actualValues != expectedValues) {
-      std::cout << "EXPECTED\n";
-      for (auto v : expectedValues) {
-        std::cout << "{";
-        for (int64_t iv : v) {
-          std::cout << iv << ", ";
-        }
-        std::cout << "}\n";
-      }
-      std::cout << "ACTUAL\n";
-      for (auto v : actualValues) {
-        std::cout << "{";
-        for (int64_t iv : v) {
-          std::cout << iv << ", ";
-        }
-        std::cout << "}\n";
-      }
-    }
-  }
-
-  std::set<std::vector<int64_t>> expectedValues;
-  std::set<std::vector<int64_t>> actualValues;
-};
-
-BENCHMARK_DEFINE_F(ArgsProductFixture, Empty)(benchmark::State& state) {
-  for (auto _ : state) {
-    int64_t product =
-        state.range(0) * state.range(1) * state.range(2) * state.range(3);
-    for (int64_t x = 0; x < product; x++) {
-      benchmark::DoNotOptimize(x);
-    }
-  }
-}
-
-BENCHMARK_REGISTER_F(ArgsProductFixture, Empty)
-    ->Args({0, 100, 2000, 30000})
-    ->ArgsProduct({{1, 2}, {15}, {3, 7, 10}, {8, 9}})
-    ->Args({4, 5, 6, 11});
-
-BENCHMARK_MAIN();
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/test/basic_test.cc b/gnu/llvm/libcxx/utils/google-benchmark/test/basic_test.cc
deleted file mode 100644
index d07fbc00b15..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/test/basic_test.cc
+++ /dev/null
@@ -1,136 +0,0 @@
-
-#include "benchmark/benchmark.h"
-
-#define BASIC_BENCHMARK_TEST(x) BENCHMARK(x)->Arg(8)->Arg(512)->Arg(8192)
-
-void BM_empty(benchmark::State& state) {
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(state.iterations());
-  }
-}
-BENCHMARK(BM_empty);
-BENCHMARK(BM_empty)->ThreadPerCpu();
-
-void BM_spin_empty(benchmark::State& state) {
-  for (auto _ : state) {
-    for (int x = 0; x < state.range(0); ++x) {
-      benchmark::DoNotOptimize(x);
-    }
-  }
-}
-BASIC_BENCHMARK_TEST(BM_spin_empty);
-BASIC_BENCHMARK_TEST(BM_spin_empty)->ThreadPerCpu();
-
-void BM_spin_pause_before(benchmark::State& state) {
-  for (int i = 0; i < state.range(0); ++i) {
-    benchmark::DoNotOptimize(i);
-  }
-  for (auto _ : state) {
-    for (int i = 0; i < state.range(0); ++i) {
-      benchmark::DoNotOptimize(i);
-    }
-  }
-}
-BASIC_BENCHMARK_TEST(BM_spin_pause_before);
-BASIC_BENCHMARK_TEST(BM_spin_pause_before)->ThreadPerCpu();
-
-void BM_spin_pause_during(benchmark::State& state) {
-  for (auto _ : state) {
-    state.PauseTiming();
-    for (int i = 0; i < state.range(0); ++i) {
-      benchmark::DoNotOptimize(i);
-    }
-    state.ResumeTiming();
-    for (int i = 0; i < state.range(0); ++i) {
-      benchmark::DoNotOptimize(i);
-    }
-  }
-}
-BASIC_BENCHMARK_TEST(BM_spin_pause_during);
-BASIC_BENCHMARK_TEST(BM_spin_pause_during)->ThreadPerCpu();
-
-void BM_pause_during(benchmark::State& state) {
-  for (auto _ : state) {
-    state.PauseTiming();
-    state.ResumeTiming();
-  }
-}
-BENCHMARK(BM_pause_during);
-BENCHMARK(BM_pause_during)->ThreadPerCpu();
-BENCHMARK(BM_pause_during)->UseRealTime();
-BENCHMARK(BM_pause_during)->UseRealTime()->ThreadPerCpu();
-
-void BM_spin_pause_after(benchmark::State& state) {
-  for (auto _ : state) {
-    for (int i = 0; i < state.range(0); ++i) {
-      benchmark::DoNotOptimize(i);
-    }
-  }
-  for (int i = 0; i < state.range(0); ++i) {
-    benchmark::DoNotOptimize(i);
-  }
-}
-BASIC_BENCHMARK_TEST(BM_spin_pause_after);
-BASIC_BENCHMARK_TEST(BM_spin_pause_after)->ThreadPerCpu();
-
-void BM_spin_pause_before_and_after(benchmark::State& state) {
-  for (int i = 0; i < state.range(0); ++i) {
-    benchmark::DoNotOptimize(i);
-  }
-  for (auto _ : state) {
-    for (int i = 0; i < state.range(0); ++i) {
-      benchmark::DoNotOptimize(i);
-    }
-  }
-  for (int i = 0; i < state.range(0); ++i) {
-    benchmark::DoNotOptimize(i);
-  }
-}
-BASIC_BENCHMARK_TEST(BM_spin_pause_before_and_after);
-BASIC_BENCHMARK_TEST(BM_spin_pause_before_and_after)->ThreadPerCpu();
-
-void BM_empty_stop_start(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_empty_stop_start);
-BENCHMARK(BM_empty_stop_start)->ThreadPerCpu();
-
-
-void BM_KeepRunning(benchmark::State& state) {
-  size_t iter_count = 0;
-  assert(iter_count == state.iterations());
-  while (state.KeepRunning()) {
-    ++iter_count;
-  }
-  assert(iter_count == state.iterations());
-}
-BENCHMARK(BM_KeepRunning);
-
-void BM_KeepRunningBatch(benchmark::State& state) {
-  // Choose a prime batch size to avoid evenly dividing max_iterations.
-  const size_t batch_size = 101;
-  size_t iter_count = 0;
-  while (state.KeepRunningBatch(batch_size)) {
-    iter_count += batch_size;
-  }
-  assert(state.iterations() == iter_count);
-}
-BENCHMARK(BM_KeepRunningBatch);
-
-void BM_RangedFor(benchmark::State& state) {
-  size_t iter_count = 0;
-  for (auto _ : state) {
-    ++iter_count;
-  }
-  assert(iter_count == state.max_iterations);
-}
-BENCHMARK(BM_RangedFor);
-
-// Ensure that StateIterator provides all the necessary typedefs required to
-// instantiate std::iterator_traits.
-static_assert(std::is_same<
-  typename std::iterator_traits<benchmark::State::StateIterator>::value_type,
-  typename benchmark::State::StateIterator::value_type>::value, "");
-
-BENCHMARK_MAIN();
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/test/benchmark_gtest.cc b/gnu/llvm/libcxx/utils/google-benchmark/test/benchmark_gtest.cc
deleted file mode 100644
index 10683b433ab..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/test/benchmark_gtest.cc
+++ /dev/null
@@ -1,33 +0,0 @@
-#include <vector>
-
-#include "../src/benchmark_register.h"
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-
-namespace {
-
-TEST(AddRangeTest, Simple) {
-  std::vector<int> dst;
-  AddRange(&dst, 1, 2, 2);
-  EXPECT_THAT(dst, testing::ElementsAre(1, 2));
-}
-
-TEST(AddRangeTest, Simple64) {
-  std::vector<int64_t> dst;
-  AddRange(&dst, static_cast<int64_t>(1), static_cast<int64_t>(2), 2);
-  EXPECT_THAT(dst, testing::ElementsAre(1, 2));
-}
-
-TEST(AddRangeTest, Advanced) {
-  std::vector<int> dst;
-  AddRange(&dst, 5, 15, 2);
-  EXPECT_THAT(dst, testing::ElementsAre(5, 8, 15));
-}
-
-TEST(AddRangeTest, Advanced64) {
-  std::vector<int64_t> dst;
-  AddRange(&dst, static_cast<int64_t>(5), static_cast<int64_t>(15), 2);
-  EXPECT_THAT(dst, testing::ElementsAre(5, 8, 15));
-}
-
-}  // end namespace
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/test/benchmark_name_gtest.cc b/gnu/llvm/libcxx/utils/google-benchmark/test/benchmark_name_gtest.cc
deleted file mode 100644
index afb401c1f53..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/test/benchmark_name_gtest.cc
+++ /dev/null
@@ -1,74 +0,0 @@
-#include "benchmark/benchmark.h"
-#include "gtest/gtest.h"
-
-namespace {
-
-using namespace benchmark;
-using namespace benchmark::internal;
-
-TEST(BenchmarkNameTest, Empty) {
-  const auto name = BenchmarkName();
-  EXPECT_EQ(name.str(), std::string());
-}
-
-TEST(BenchmarkNameTest, FunctionName) {
-  auto name = BenchmarkName();
-  name.function_name = "function_name";
-  EXPECT_EQ(name.str(), "function_name");
-}
-
-TEST(BenchmarkNameTest, FunctionNameAndArgs) {
-  auto name = BenchmarkName();
-  name.function_name = "function_name";
-  name.args = "some_args:3/4/5";
-  EXPECT_EQ(name.str(), "function_name/some_args:3/4/5");
-}
-
-TEST(BenchmarkNameTest, MinTime) {
-  auto name = BenchmarkName();
-  name.function_name = "function_name";
-  name.args = "some_args:3/4";
-  name.min_time = "min_time:3.4s";
-  EXPECT_EQ(name.str(), "function_name/some_args:3/4/min_time:3.4s");
-}
-
-TEST(BenchmarkNameTest, Iterations) {
-  auto name = BenchmarkName();
-  name.function_name = "function_name";
-  name.min_time = "min_time:3.4s";
-  name.iterations = "iterations:42";
-  EXPECT_EQ(name.str(), "function_name/min_time:3.4s/iterations:42");
-}
-
-TEST(BenchmarkNameTest, Repetitions) {
-  auto name = BenchmarkName();
-  name.function_name = "function_name";
-  name.min_time = "min_time:3.4s";
-  name.repetitions = "repetitions:24";
-  EXPECT_EQ(name.str(), "function_name/min_time:3.4s/repetitions:24");
-}
-
-TEST(BenchmarkNameTest, TimeType) {
-  auto name = BenchmarkName();
-  name.function_name = "function_name";
-  name.min_time = "min_time:3.4s";
-  name.time_type = "hammer_time";
-  EXPECT_EQ(name.str(), "function_name/min_time:3.4s/hammer_time");
-}
-
-TEST(BenchmarkNameTest, Threads) {
-  auto name = BenchmarkName();
-  name.function_name = "function_name";
-  name.min_time = "min_time:3.4s";
-  name.threads = "threads:256";
-  EXPECT_EQ(name.str(), "function_name/min_time:3.4s/threads:256");
-}
-
-TEST(BenchmarkNameTest, TestEmptyFunctionName) {
-  auto name = BenchmarkName();
-  name.args = "first:3/second:4";
-  name.threads = "threads:22";
-  EXPECT_EQ(name.str(), "first:3/second:4/threads:22");
-}
-
-}  // end namespace
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/test/benchmark_random_interleaving_gtest.cc b/gnu/llvm/libcxx/utils/google-benchmark/test/benchmark_random_interleaving_gtest.cc
deleted file mode 100644
index 8e28dab3f41..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/test/benchmark_random_interleaving_gtest.cc
+++ /dev/null
@@ -1,126 +0,0 @@
-#include <queue>
-#include <string>
-#include <vector>
-
-#include "../src/commandlineflags.h"
-#include "../src/string_util.h"
-#include "benchmark/benchmark.h"
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-
-DECLARE_bool(benchmark_enable_random_interleaving);
-DECLARE_string(benchmark_filter);
-DECLARE_int32(benchmark_repetitions);
-
-namespace benchmark {
-namespace internal {
-namespace {
-
-class EventQueue : public std::queue<std::string> {
- public:
-  void Put(const std::string& event) { push(event); }
-
-  void Clear() {
-    while (!empty()) {
-      pop();
-    }
-  }
-
-  std::string Get() {
-    std::string event = front();
-    pop();
-    return event;
-  }
-};
-
-static EventQueue* queue = new EventQueue;
-
-class NullReporter : public BenchmarkReporter {
- public:
-  bool ReportContext(const Context& /*context*/) override { return true; }
-  void ReportRuns(const std::vector<Run>& /* report */) override {}
-};
-
-class BenchmarkTest : public testing::Test {
- public:
-  static void SetupHook(int /* num_threads */) { queue->push("Setup"); }
-
-  static void TeardownHook(int /* num_threads */) { queue->push("Teardown"); }
-
-  void Execute(const std::string& pattern) {
-    queue->Clear();
-
-    BenchmarkReporter* reporter = new NullReporter;
-    FLAGS_benchmark_filter = pattern;
-    RunSpecifiedBenchmarks(reporter);
-    delete reporter;
-
-    queue->Put("DONE");  // End marker
-  }
-};
-
-static void BM_Match1(benchmark::State& state) {
-  const int64_t arg = state.range(0);
-
-  for (auto _ : state) {
-  }
-  queue->Put(StrFormat("BM_Match1/%d", static_cast<int>(arg)));
-}
-BENCHMARK(BM_Match1)
-    ->Iterations(100)
-    ->Arg(1)
-    ->Arg(2)
-    ->Arg(3)
-    ->Range(10, 80)
-    ->Args({90})
-    ->Args({100});
-
-TEST_F(BenchmarkTest, Match1) {
-  Execute("BM_Match1");
-  ASSERT_EQ("BM_Match1/1", queue->Get());
-  ASSERT_EQ("BM_Match1/2", queue->Get());
-  ASSERT_EQ("BM_Match1/3", queue->Get());
-  ASSERT_EQ("BM_Match1/10", queue->Get());
-  ASSERT_EQ("BM_Match1/64", queue->Get());
-  ASSERT_EQ("BM_Match1/80", queue->Get());
-  ASSERT_EQ("BM_Match1/90", queue->Get());
-  ASSERT_EQ("BM_Match1/100", queue->Get());
-  ASSERT_EQ("DONE", queue->Get());
-}
-
-TEST_F(BenchmarkTest, Match1WithRepetition) {
-  FLAGS_benchmark_repetitions = 2;
-
-  Execute("BM_Match1/(64|80)");
-  ASSERT_EQ("BM_Match1/64", queue->Get());
-  ASSERT_EQ("BM_Match1/64", queue->Get());
-  ASSERT_EQ("BM_Match1/80", queue->Get());
-  ASSERT_EQ("BM_Match1/80", queue->Get());
-  ASSERT_EQ("DONE", queue->Get());
-}
-
-TEST_F(BenchmarkTest, Match1WithRandomInterleaving) {
-  FLAGS_benchmark_enable_random_interleaving = true;
-  FLAGS_benchmark_repetitions = 100;
-
-  std::map<std::string, int> element_count;
-  std::map<std::string, int> interleaving_count;
-  Execute("BM_Match1/(64|80)");
-  for (int i = 0; i < 100; ++i) {
-    std::vector<std::string> interleaving;
-    interleaving.push_back(queue->Get());
-    interleaving.push_back(queue->Get());
-    element_count[interleaving[0].c_str()]++;
-    element_count[interleaving[1].c_str()]++;
-    interleaving_count[StrFormat("%s,%s", interleaving[0].c_str(),
-                                 interleaving[1].c_str())]++;
-  }
-  EXPECT_EQ(element_count["BM_Match1/64"], 100) << "Unexpected repetitions.";
-  EXPECT_EQ(element_count["BM_Match1/80"], 100) << "Unexpected repetitions.";
-  EXPECT_GE(interleaving_count.size(), 2) << "Interleaving was not randomized.";
-  ASSERT_EQ("DONE", queue->Get());
-}
-
-}  // namespace
-}  // namespace internal
-}  // namespace benchmark
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/test/benchmark_test.cc b/gnu/llvm/libcxx/utils/google-benchmark/test/benchmark_test.cc
deleted file mode 100644
index 3cd4f5565fa..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/test/benchmark_test.cc
+++ /dev/null
@@ -1,245 +0,0 @@
-#include "benchmark/benchmark.h"
-
-#include <assert.h>
-#include <math.h>
-#include <stdint.h>
-
-#include <chrono>
-#include <cstdlib>
-#include <iostream>
-#include <limits>
-#include <list>
-#include <map>
-#include <mutex>
-#include <set>
-#include <sstream>
-#include <string>
-#include <thread>
-#include <utility>
-#include <vector>
-
-#if defined(__GNUC__)
-#define BENCHMARK_NOINLINE __attribute__((noinline))
-#else
-#define BENCHMARK_NOINLINE
-#endif
-
-namespace {
-
-int BENCHMARK_NOINLINE Factorial(uint32_t n) {
-  return (n == 1) ? 1 : n * Factorial(n - 1);
-}
-
-double CalculatePi(int depth) {
-  double pi = 0.0;
-  for (int i = 0; i < depth; ++i) {
-    double numerator = static_cast<double>(((i % 2) * 2) - 1);
-    double denominator = static_cast<double>((2 * i) - 1);
-    pi += numerator / denominator;
-  }
-  return (pi - 1.0) * 4;
-}
-
-std::set<int64_t> ConstructRandomSet(int64_t size) {
-  std::set<int64_t> s;
-  for (int i = 0; i < size; ++i) s.insert(s.end(), i);
-  return s;
-}
-
-std::mutex test_vector_mu;
-std::vector<int>* test_vector = nullptr;
-
-}  // end namespace
-
-static void BM_Factorial(benchmark::State& state) {
-  int fac_42 = 0;
-  for (auto _ : state) fac_42 = Factorial(8);
-  // Prevent compiler optimizations
-  std::stringstream ss;
-  ss << fac_42;
-  state.SetLabel(ss.str());
-}
-BENCHMARK(BM_Factorial);
-BENCHMARK(BM_Factorial)->UseRealTime();
-
-static void BM_CalculatePiRange(benchmark::State& state) {
-  double pi = 0.0;
-  for (auto _ : state) pi = CalculatePi(static_cast<int>(state.range(0)));
-  std::stringstream ss;
-  ss << pi;
-  state.SetLabel(ss.str());
-}
-BENCHMARK_RANGE(BM_CalculatePiRange, 1, 1024 * 1024);
-
-static void BM_CalculatePi(benchmark::State& state) {
-  static const int depth = 1024;
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(CalculatePi(static_cast<int>(depth)));
-  }
-}
-BENCHMARK(BM_CalculatePi)->Threads(8);
-BENCHMARK(BM_CalculatePi)->ThreadRange(1, 32);
-BENCHMARK(BM_CalculatePi)->ThreadPerCpu();
-
-static void BM_SetInsert(benchmark::State& state) {
-  std::set<int64_t> data;
-  for (auto _ : state) {
-    state.PauseTiming();
-    data = ConstructRandomSet(state.range(0));
-    state.ResumeTiming();
-    for (int j = 0; j < state.range(1); ++j) data.insert(rand());
-  }
-  state.SetItemsProcessed(state.iterations() * state.range(1));
-  state.SetBytesProcessed(state.iterations() * state.range(1) * sizeof(int));
-}
-
-// Test many inserts at once to reduce the total iterations needed. Otherwise, the slower,
-// non-timed part of each iteration will make the benchmark take forever.
-BENCHMARK(BM_SetInsert)->Ranges({{1 << 10, 8 << 10}, {128, 512}});
-
-template <typename Container,
-          typename ValueType = typename Container::value_type>
-static void BM_Sequential(benchmark::State& state) {
-  ValueType v = 42;
-  for (auto _ : state) {
-    Container c;
-    for (int64_t i = state.range(0); --i;) c.push_back(v);
-  }
-  const int64_t items_processed = state.iterations() * state.range(0);
-  state.SetItemsProcessed(items_processed);
-  state.SetBytesProcessed(items_processed * sizeof(v));
-}
-BENCHMARK_TEMPLATE2(BM_Sequential, std::vector<int>, int)
-    ->Range(1 << 0, 1 << 10);
-BENCHMARK_TEMPLATE(BM_Sequential, std::list<int>)->Range(1 << 0, 1 << 10);
-// Test the variadic version of BENCHMARK_TEMPLATE in C++11 and beyond.
-#ifdef BENCHMARK_HAS_CXX11
-BENCHMARK_TEMPLATE(BM_Sequential, std::vector<int>, int)->Arg(512);
-#endif
-
-static void BM_StringCompare(benchmark::State& state) {
-  size_t len = static_cast<size_t>(state.range(0));
-  std::string s1(len, '-');
-  std::string s2(len, '-');
-  for (auto _ : state) benchmark::DoNotOptimize(s1.compare(s2));
-}
-BENCHMARK(BM_StringCompare)->Range(1, 1 << 20);
-
-static void BM_SetupTeardown(benchmark::State& state) {
-  if (state.thread_index == 0) {
-    // No need to lock test_vector_mu here as this is running single-threaded.
-    test_vector = new std::vector<int>();
-  }
-  int i = 0;
-  for (auto _ : state) {
-    std::lock_guard<std::mutex> l(test_vector_mu);
-    if (i % 2 == 0)
-      test_vector->push_back(i);
-    else
-      test_vector->pop_back();
-    ++i;
-  }
-  if (state.thread_index == 0) {
-    delete test_vector;
-  }
-}
-BENCHMARK(BM_SetupTeardown)->ThreadPerCpu();
-
-static void BM_LongTest(benchmark::State& state) {
-  double tracker = 0.0;
-  for (auto _ : state) {
-    for (int i = 0; i < state.range(0); ++i)
-      benchmark::DoNotOptimize(tracker += i);
-  }
-}
-BENCHMARK(BM_LongTest)->Range(1 << 16, 1 << 28);
-
-static void BM_ParallelMemset(benchmark::State& state) {
-  int64_t size = state.range(0) / static_cast<int64_t>(sizeof(int));
-  int thread_size = static_cast<int>(size) / state.threads;
-  int from = thread_size * state.thread_index;
-  int to = from + thread_size;
-
-  if (state.thread_index == 0) {
-    test_vector = new std::vector<int>(static_cast<size_t>(size));
-  }
-
-  for (auto _ : state) {
-    for (int i = from; i < to; i++) {
-      // No need to lock test_vector_mu as ranges
-      // do not overlap between threads.
-      benchmark::DoNotOptimize(test_vector->at(i) = 1);
-    }
-  }
-
-  if (state.thread_index == 0) {
-    delete test_vector;
-  }
-}
-BENCHMARK(BM_ParallelMemset)->Arg(10 << 20)->ThreadRange(1, 4);
-
-static void BM_ManualTiming(benchmark::State& state) {
-  int64_t slept_for = 0;
-  int64_t microseconds = state.range(0);
-  std::chrono::duration<double, std::micro> sleep_duration{
-      static_cast<double>(microseconds)};
-
-  for (auto _ : state) {
-    auto start = std::chrono::high_resolution_clock::now();
-    // Simulate some useful workload with a sleep
-    std::this_thread::sleep_for(
-        std::chrono::duration_cast<std::chrono::nanoseconds>(sleep_duration));
-    auto end = std::chrono::high_resolution_clock::now();
-
-    auto elapsed =
-        std::chrono::duration_cast<std::chrono::duration<double>>(end - start);
-
-    state.SetIterationTime(elapsed.count());
-    slept_for += microseconds;
-  }
-  state.SetItemsProcessed(slept_for);
-}
-BENCHMARK(BM_ManualTiming)->Range(1, 1 << 14)->UseRealTime();
-BENCHMARK(BM_ManualTiming)->Range(1, 1 << 14)->UseManualTime();
-
-#ifdef BENCHMARK_HAS_CXX11
-
-template <class... Args>
-void BM_with_args(benchmark::State& state, Args&&...) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK_CAPTURE(BM_with_args, int_test, 42, 43, 44);
-BENCHMARK_CAPTURE(BM_with_args, string_and_pair_test, std::string("abc"),
-                  std::pair<int, double>(42, 3.8));
-
-void BM_non_template_args(benchmark::State& state, int, double) {
-  while(state.KeepRunning()) {}
-}
-BENCHMARK_CAPTURE(BM_non_template_args, basic_test, 0, 0);
-
-#endif  // BENCHMARK_HAS_CXX11
-
-static void BM_DenseThreadRanges(benchmark::State& st) {
-  switch (st.range(0)) {
-    case 1:
-      assert(st.threads == 1 || st.threads == 2 || st.threads == 3);
-      break;
-    case 2:
-      assert(st.threads == 1 || st.threads == 3 || st.threads == 4);
-      break;
-    case 3:
-      assert(st.threads == 5 || st.threads == 8 || st.threads == 11 ||
-             st.threads == 14);
-      break;
-    default:
-      assert(false && "Invalid test case number");
-  }
-  while (st.KeepRunning()) {
-  }
-}
-BENCHMARK(BM_DenseThreadRanges)->Arg(1)->DenseThreadRange(1, 3);
-BENCHMARK(BM_DenseThreadRanges)->Arg(2)->DenseThreadRange(1, 4, 2);
-BENCHMARK(BM_DenseThreadRanges)->Arg(3)->DenseThreadRange(5, 14, 3);
-
-BENCHMARK_MAIN();
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/test/clobber_memory_assembly_test.cc b/gnu/llvm/libcxx/utils/google-benchmark/test/clobber_memory_assembly_test.cc
deleted file mode 100644
index f41911a39ce..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/test/clobber_memory_assembly_test.cc
+++ /dev/null
@@ -1,64 +0,0 @@
-#include <benchmark/benchmark.h>
-
-#ifdef __clang__
-#pragma clang diagnostic ignored "-Wreturn-type"
-#endif
-
-extern "C" {
-
-extern int ExternInt;
-extern int ExternInt2;
-extern int ExternInt3;
-
-}
-
-// CHECK-LABEL: test_basic:
-extern "C" void test_basic() {
-  int x;
-  benchmark::DoNotOptimize(&x);
-  x = 101;
-  benchmark::ClobberMemory();
-  // CHECK: leaq [[DEST:[^,]+]], %rax
-  // CHECK: movl $101, [[DEST]]
-  // CHECK: ret
-}
-
-// CHECK-LABEL: test_redundant_store:
-extern "C" void test_redundant_store() {
-  ExternInt = 3;
-  benchmark::ClobberMemory();
-  ExternInt = 51;
-  // CHECK-DAG: ExternInt
-  // CHECK-DAG: movl $3
-  // CHECK: movl $51
-}
-
-// CHECK-LABEL: test_redundant_read:
-extern "C" void test_redundant_read() {
-  int x;
-  benchmark::DoNotOptimize(&x);
-  x = ExternInt;
-  benchmark::ClobberMemory();
-  x = ExternInt2;
-  // CHECK: leaq [[DEST:[^,]+]], %rax
-  // CHECK: ExternInt(%rip)
-  // CHECK: movl %eax, [[DEST]]
-  // CHECK-NOT: ExternInt2
-  // CHECK: ret
-}
-
-// CHECK-LABEL: test_redundant_read2:
-extern "C" void test_redundant_read2() {
-  int x;
-  benchmark::DoNotOptimize(&x);
-  x = ExternInt;
-  benchmark::ClobberMemory();
-  x = ExternInt2;
-  benchmark::ClobberMemory();
-  // CHECK: leaq [[DEST:[^,]+]], %rax
-  // CHECK: ExternInt(%rip)
-  // CHECK: movl %eax, [[DEST]]
-  // CHECK: ExternInt2(%rip)
-  // CHECK: movl %eax, [[DEST]]
-  // CHECK: ret
-}
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/test/commandlineflags_gtest.cc b/gnu/llvm/libcxx/utils/google-benchmark/test/commandlineflags_gtest.cc
deleted file mode 100644
index 8412008ffe3..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/test/commandlineflags_gtest.cc
+++ /dev/null
@@ -1,228 +0,0 @@
-#include <cstdlib>
-
-#include "../src/commandlineflags.h"
-#include "../src/internal_macros.h"
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-
-namespace benchmark {
-namespace {
-
-#if defined(BENCHMARK_OS_WINDOWS)
-int setenv(const char* name, const char* value, int overwrite) {
-  if (!overwrite) {
-    // NOTE: getenv_s is far superior but not available under mingw.
-    char* env_value = getenv(name);
-    if (env_value == nullptr) {
-      return -1;
-    }
-  }
-  return _putenv_s(name, value);
-}
-
-int unsetenv(const char* name) { return _putenv_s(name, ""); }
-
-#endif  // BENCHMARK_OS_WINDOWS
-
-TEST(BoolFromEnv, Default) {
-  ASSERT_EQ(unsetenv("NOT_IN_ENV"), 0);
-  EXPECT_EQ(BoolFromEnv("not_in_env", true), true);
-}
-
-TEST(BoolFromEnv, False) {
-  ASSERT_EQ(setenv("IN_ENV", "0", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", true), false);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "N", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", true), false);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "n", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", true), false);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "NO", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", true), false);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "No", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", true), false);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "no", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", true), false);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "F", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", true), false);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "f", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", true), false);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "FALSE", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", true), false);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "False", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", true), false);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "false", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", true), false);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "OFF", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", true), false);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "Off", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", true), false);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "off", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", true), false);
-  unsetenv("IN_ENV");
-}
-
-TEST(BoolFromEnv, True) {
-  ASSERT_EQ(setenv("IN_ENV", "1", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", false), true);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "Y", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", false), true);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "y", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", false), true);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "YES", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", false), true);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "Yes", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", false), true);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "yes", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", false), true);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "T", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", false), true);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "t", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", false), true);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "TRUE", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", false), true);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "True", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", false), true);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "true", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", false), true);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "ON", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", false), true);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "On", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", false), true);
-  unsetenv("IN_ENV");
-
-  ASSERT_EQ(setenv("IN_ENV", "on", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", false), true);
-  unsetenv("IN_ENV");
-
-#ifndef BENCHMARK_OS_WINDOWS
-  ASSERT_EQ(setenv("IN_ENV", "", 1), 0);
-  EXPECT_EQ(BoolFromEnv("in_env", false), true);
-  unsetenv("IN_ENV");
-#endif
-}
-
-TEST(Int32FromEnv, NotInEnv) {
-  ASSERT_EQ(unsetenv("NOT_IN_ENV"), 0);
-  EXPECT_EQ(Int32FromEnv("not_in_env", 42), 42);
-}
-
-TEST(Int32FromEnv, InvalidInteger) {
-  ASSERT_EQ(setenv("IN_ENV", "foo", 1), 0);
-  EXPECT_EQ(Int32FromEnv("in_env", 42), 42);
-  unsetenv("IN_ENV");
-}
-
-TEST(Int32FromEnv, ValidInteger) {
-  ASSERT_EQ(setenv("IN_ENV", "42", 1), 0);
-  EXPECT_EQ(Int32FromEnv("in_env", 64), 42);
-  unsetenv("IN_ENV");
-}
-
-TEST(DoubleFromEnv, NotInEnv) {
-  ASSERT_EQ(unsetenv("NOT_IN_ENV"), 0);
-  EXPECT_EQ(DoubleFromEnv("not_in_env", 0.51), 0.51);
-}
-
-TEST(DoubleFromEnv, InvalidReal) {
-  ASSERT_EQ(setenv("IN_ENV", "foo", 1), 0);
-  EXPECT_EQ(DoubleFromEnv("in_env", 0.51), 0.51);
-  unsetenv("IN_ENV");
-}
-
-TEST(DoubleFromEnv, ValidReal) {
-  ASSERT_EQ(setenv("IN_ENV", "0.51", 1), 0);
-  EXPECT_EQ(DoubleFromEnv("in_env", 0.71), 0.51);
-  unsetenv("IN_ENV");
-}
-
-TEST(StringFromEnv, Default) {
-  ASSERT_EQ(unsetenv("NOT_IN_ENV"), 0);
-  EXPECT_STREQ(StringFromEnv("not_in_env", "foo"), "foo");
-}
-
-TEST(StringFromEnv, Valid) {
-  ASSERT_EQ(setenv("IN_ENV", "foo", 1), 0);
-  EXPECT_STREQ(StringFromEnv("in_env", "bar"), "foo");
-  unsetenv("IN_ENV");
-}
-
-TEST(KvPairsFromEnv, Default) {
-  ASSERT_EQ(unsetenv("NOT_IN_ENV"), 0);
-  EXPECT_THAT(KvPairsFromEnv("not_in_env", {{"foo", "bar"}}),
-              testing::ElementsAre(testing::Pair("foo", "bar")));
-}
-
-TEST(KvPairsFromEnv, MalformedReturnsDefault) {
-  ASSERT_EQ(setenv("IN_ENV", "foo", 1), 0);
-  EXPECT_THAT(KvPairsFromEnv("in_env", {{"foo", "bar"}}),
-              testing::ElementsAre(testing::Pair("foo", "bar")));
-  unsetenv("IN_ENV");
-}
-
-TEST(KvPairsFromEnv, Single) {
-  ASSERT_EQ(setenv("IN_ENV", "foo=bar", 1), 0);
-  EXPECT_THAT(KvPairsFromEnv("in_env", {}),
-              testing::ElementsAre(testing::Pair("foo", "bar")));
-  unsetenv("IN_ENV");
-}
-
-TEST(KvPairsFromEnv, Multiple) {
-  ASSERT_EQ(setenv("IN_ENV", "foo=bar,baz=qux", 1), 0);
-  EXPECT_THAT(KvPairsFromEnv("in_env", {}),
-              testing::UnorderedElementsAre(testing::Pair("foo", "bar"),
-                                            testing::Pair("baz", "qux")));
-  unsetenv("IN_ENV");
-}
-
-}  // namespace
-}  // namespace benchmark
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/test/complexity_test.cc b/gnu/llvm/libcxx/utils/google-benchmark/test/complexity_test.cc
deleted file mode 100644
index 323ddfe7ac5..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/test/complexity_test.cc
+++ /dev/null
@@ -1,183 +0,0 @@
-#undef NDEBUG
-#include <algorithm>
-#include <cassert>
-#include <cmath>
-#include <cstdlib>
-#include <vector>
-#include "benchmark/benchmark.h"
-#include "output_test.h"
-
-namespace {
-
-#define ADD_COMPLEXITY_CASES(...) \
-  int CONCAT(dummy, __LINE__) = AddComplexityTest(__VA_ARGS__)
-
-int AddComplexityTest(std::string test_name, std::string big_o_test_name,
-                      std::string rms_test_name, std::string big_o) {
-  SetSubstitutions({{"%name", test_name},
-                    {"%bigo_name", big_o_test_name},
-                    {"%rms_name", rms_test_name},
-                    {"%bigo_str", "[ ]* %float " + big_o},
-                    {"%bigo", big_o},
-                    {"%rms", "[ ]*[0-9]+ %"}});
-  AddCases(
-      TC_ConsoleOut,
-      {{"^%bigo_name %bigo_str %bigo_str[ ]*$"},
-       {"^%bigo_name", MR_Not},  // Assert we we didn't only matched a name.
-       {"^%rms_name %rms %rms[ ]*$", MR_Next}});
-  AddCases(TC_JSONOut, {{"\"name\": \"%bigo_name\",$"},
-                        {"\"run_name\": \"%name\",$", MR_Next},
-                        {"\"run_type\": \"aggregate\",$", MR_Next},
-                        {"\"aggregate_name\": \"BigO\",$", MR_Next},
-                        {"\"cpu_coefficient\": %float,$", MR_Next},
-                        {"\"real_coefficient\": %float,$", MR_Next},
-                        {"\"big_o\": \"%bigo\",$", MR_Next},
-                        {"\"time_unit\": \"ns\"$", MR_Next},
-                        {"}", MR_Next},
-                        {"\"name\": \"%rms_name\",$"},
-                        {"\"run_name\": \"%name\",$", MR_Next},
-                        {"\"run_type\": \"aggregate\",$", MR_Next},
-                        {"\"aggregate_name\": \"RMS\",$", MR_Next},
-                        {"\"rms\": %float$", MR_Next},
-                        {"}", MR_Next}});
-  AddCases(TC_CSVOut, {{"^\"%bigo_name\",,%float,%float,%bigo,,,,,$"},
-                       {"^\"%bigo_name\"", MR_Not},
-                       {"^\"%rms_name\",,%float,%float,,,,,,$", MR_Next}});
-  return 0;
-}
-
-}  // end namespace
-
-// ========================================================================= //
-// --------------------------- Testing BigO O(1) --------------------------- //
-// ========================================================================= //
-
-void BM_Complexity_O1(benchmark::State& state) {
-  for (auto _ : state) {
-    for (int i = 0; i < 1024; ++i) {
-      benchmark::DoNotOptimize(&i);
-    }
-  }
-  state.SetComplexityN(state.range(0));
-}
-BENCHMARK(BM_Complexity_O1)->Range(1, 1 << 18)->Complexity(benchmark::o1);
-BENCHMARK(BM_Complexity_O1)->Range(1, 1 << 18)->Complexity();
-BENCHMARK(BM_Complexity_O1)->Range(1, 1 << 18)->Complexity([](int64_t) {
-  return 1.0;
-});
-
-const char *one_test_name = "BM_Complexity_O1";
-const char *big_o_1_test_name = "BM_Complexity_O1_BigO";
-const char *rms_o_1_test_name = "BM_Complexity_O1_RMS";
-const char *enum_big_o_1 = "\\([0-9]+\\)";
-// FIXME: Tolerate both '(1)' and 'lgN' as output when the complexity is auto
-// deduced.
-// See https://github.com/google/benchmark/issues/272
-const char *auto_big_o_1 = "(\\([0-9]+\\))|(lgN)";
-const char *lambda_big_o_1 = "f\\(N\\)";
-
-// Add enum tests
-ADD_COMPLEXITY_CASES(one_test_name, big_o_1_test_name, rms_o_1_test_name,
-                     enum_big_o_1);
-
-// Add auto enum tests
-ADD_COMPLEXITY_CASES(one_test_name, big_o_1_test_name, rms_o_1_test_name,
-                     auto_big_o_1);
-
-// Add lambda tests
-ADD_COMPLEXITY_CASES(one_test_name, big_o_1_test_name, rms_o_1_test_name,
-                     lambda_big_o_1);
-
-// ========================================================================= //
-// --------------------------- Testing BigO O(N) --------------------------- //
-// ========================================================================= //
-
-std::vector<int> ConstructRandomVector(int64_t size) {
-  std::vector<int> v;
-  v.reserve(static_cast<int>(size));
-  for (int i = 0; i < size; ++i) {
-    v.push_back(static_cast<int>(std::rand() % size));
-  }
-  return v;
-}
-
-void BM_Complexity_O_N(benchmark::State& state) {
-  auto v = ConstructRandomVector(state.range(0));
-  // Test worst case scenario (item not in vector)
-  const int64_t item_not_in_vector = state.range(0) * 2;
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(std::find(v.begin(), v.end(), item_not_in_vector));
-  }
-  state.SetComplexityN(state.range(0));
-}
-BENCHMARK(BM_Complexity_O_N)
-    ->RangeMultiplier(2)
-    ->Range(1 << 10, 1 << 16)
-    ->Complexity(benchmark::oN);
-BENCHMARK(BM_Complexity_O_N)
-    ->RangeMultiplier(2)
-    ->Range(1 << 10, 1 << 16)
-    ->Complexity([](int64_t n) -> double { return static_cast<double>(n); });
-BENCHMARK(BM_Complexity_O_N)
-    ->RangeMultiplier(2)
-    ->Range(1 << 10, 1 << 16)
-    ->Complexity();
-
-const char *n_test_name = "BM_Complexity_O_N";
-const char *big_o_n_test_name = "BM_Complexity_O_N_BigO";
-const char *rms_o_n_test_name = "BM_Complexity_O_N_RMS";
-const char *enum_auto_big_o_n = "N";
-const char *lambda_big_o_n = "f\\(N\\)";
-
-// Add enum tests
-ADD_COMPLEXITY_CASES(n_test_name, big_o_n_test_name, rms_o_n_test_name,
-                     enum_auto_big_o_n);
-
-// Add lambda tests
-ADD_COMPLEXITY_CASES(n_test_name, big_o_n_test_name, rms_o_n_test_name,
-                     lambda_big_o_n);
-
-// ========================================================================= //
-// ------------------------- Testing BigO O(N*lgN) ------------------------- //
-// ========================================================================= //
-
-static void BM_Complexity_O_N_log_N(benchmark::State& state) {
-  auto v = ConstructRandomVector(state.range(0));
-  for (auto _ : state) {
-    std::sort(v.begin(), v.end());
-  }
-  state.SetComplexityN(state.range(0));
-}
-static const double kLog2E = 1.44269504088896340736;
-BENCHMARK(BM_Complexity_O_N_log_N)
-    ->RangeMultiplier(2)
-    ->Range(1 << 10, 1 << 16)
-    ->Complexity(benchmark::oNLogN);
-BENCHMARK(BM_Complexity_O_N_log_N)
-    ->RangeMultiplier(2)
-    ->Range(1 << 10, 1 << 16)
-    ->Complexity([](int64_t n) { return kLog2E * n * log(static_cast<double>(n)); });
-BENCHMARK(BM_Complexity_O_N_log_N)
-    ->RangeMultiplier(2)
-    ->Range(1 << 10, 1 << 16)
-    ->Complexity();
-
-const char *n_lg_n_test_name = "BM_Complexity_O_N_log_N";
-const char *big_o_n_lg_n_test_name = "BM_Complexity_O_N_log_N_BigO";
-const char *rms_o_n_lg_n_test_name = "BM_Complexity_O_N_log_N_RMS";
-const char *enum_auto_big_o_n_lg_n = "NlgN";
-const char *lambda_big_o_n_lg_n = "f\\(N\\)";
-
-// Add enum tests
-ADD_COMPLEXITY_CASES(n_lg_n_test_name, big_o_n_lg_n_test_name,
-                     rms_o_n_lg_n_test_name, enum_auto_big_o_n_lg_n);
-
-// Add lambda tests
-ADD_COMPLEXITY_CASES(n_lg_n_test_name, big_o_n_lg_n_test_name,
-                     rms_o_n_lg_n_test_name, lambda_big_o_n_lg_n);
-
-// ========================================================================= //
-// --------------------------- TEST CASES END ------------------------------ //
-// ========================================================================= //
-
-int main(int argc, char *argv[]) { RunOutputTests(argc, argv); }
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/test/cxx03_test.cc b/gnu/llvm/libcxx/utils/google-benchmark/test/cxx03_test.cc
deleted file mode 100644
index baa9ed9262b..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/test/cxx03_test.cc
+++ /dev/null
@@ -1,63 +0,0 @@
-#undef NDEBUG
-#include <cassert>
-#include <cstddef>
-
-#include "benchmark/benchmark.h"
-
-#if __cplusplus >= 201103L
-#error C++11 or greater detected. Should be C++03.
-#endif
-
-#ifdef BENCHMARK_HAS_CXX11
-#error C++11 or greater detected by the library. BENCHMARK_HAS_CXX11 is defined.
-#endif
-
-void BM_empty(benchmark::State& state) {
-  while (state.KeepRunning()) {
-    volatile std::size_t x = state.iterations();
-    ((void)x);
-  }
-}
-BENCHMARK(BM_empty);
-
-// The new C++11 interface for args/ranges requires initializer list support.
-// Therefore we provide the old interface to support C++03.
-void BM_old_arg_range_interface(benchmark::State& state) {
-  assert((state.range(0) == 1 && state.range(1) == 2) ||
-         (state.range(0) == 5 && state.range(1) == 6));
-  while (state.KeepRunning()) {
-  }
-}
-BENCHMARK(BM_old_arg_range_interface)->ArgPair(1, 2)->RangePair(5, 5, 6, 6);
-
-template <class T, class U>
-void BM_template2(benchmark::State& state) {
-  BM_empty(state);
-}
-BENCHMARK_TEMPLATE2(BM_template2, int, long);
-
-template <class T>
-void BM_template1(benchmark::State& state) {
-  BM_empty(state);
-}
-BENCHMARK_TEMPLATE(BM_template1, long);
-BENCHMARK_TEMPLATE1(BM_template1, int);
-
-template <class T>
-struct BM_Fixture : public ::benchmark::Fixture {
-};
-
-BENCHMARK_TEMPLATE_F(BM_Fixture, BM_template1, long)(benchmark::State& state) {
-  BM_empty(state);
-}
-BENCHMARK_TEMPLATE1_F(BM_Fixture, BM_template2, int)(benchmark::State& state) {
-  BM_empty(state);
-}
-
-void BM_counters(benchmark::State& state) {
-    BM_empty(state);
-    state.counters["Foo"] = 2;
-}
-BENCHMARK(BM_counters);
-
-BENCHMARK_MAIN();
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/test/diagnostics_test.cc b/gnu/llvm/libcxx/utils/google-benchmark/test/diagnostics_test.cc
deleted file mode 100644
index dd64a336553..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/test/diagnostics_test.cc
+++ /dev/null
@@ -1,80 +0,0 @@
-// Testing:
-//   State::PauseTiming()
-//   State::ResumeTiming()
-// Test that CHECK's within these function diagnose when they are called
-// outside of the KeepRunning() loop.
-//
-// NOTE: Users should NOT include or use src/check.h. This is only done in
-// order to test library internals.
-
-#include <cstdlib>
-#include <stdexcept>
-
-#include "../src/check.h"
-#include "benchmark/benchmark.h"
-
-#if defined(__GNUC__) && !defined(__EXCEPTIONS)
-#define TEST_HAS_NO_EXCEPTIONS
-#endif
-
-void TestHandler() {
-#ifndef TEST_HAS_NO_EXCEPTIONS
-  throw std::logic_error("");
-#else
-  std::abort();
-#endif
-}
-
-void try_invalid_pause_resume(benchmark::State& state) {
-#if !defined(TEST_BENCHMARK_LIBRARY_HAS_NO_ASSERTIONS) && !defined(TEST_HAS_NO_EXCEPTIONS)
-  try {
-    state.PauseTiming();
-    std::abort();
-  } catch (std::logic_error const&) {
-  }
-  try {
-    state.ResumeTiming();
-    std::abort();
-  } catch (std::logic_error const&) {
-  }
-#else
-  (void)state;  // avoid unused warning
-#endif
-}
-
-void BM_diagnostic_test(benchmark::State& state) {
-  static bool called_once = false;
-
-  if (called_once == false) try_invalid_pause_resume(state);
-
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(state.iterations());
-  }
-
-  if (called_once == false) try_invalid_pause_resume(state);
-
-  called_once = true;
-}
-BENCHMARK(BM_diagnostic_test);
-
-
-void BM_diagnostic_test_keep_running(benchmark::State& state) {
-  static bool called_once = false;
-
-  if (called_once == false) try_invalid_pause_resume(state);
-
-  while(state.KeepRunning()) {
-    benchmark::DoNotOptimize(state.iterations());
-  }
-
-  if (called_once == false) try_invalid_pause_resume(state);
-
-  called_once = true;
-}
-BENCHMARK(BM_diagnostic_test_keep_running);
-
-int main(int argc, char* argv[]) {
-  benchmark::internal::GetAbortHandler() = &TestHandler;
-  benchmark::Initialize(&argc, argv);
-  benchmark::RunSpecifiedBenchmarks();
-}
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/test/display_aggregates_only_test.cc b/gnu/llvm/libcxx/utils/google-benchmark/test/display_aggregates_only_test.cc
deleted file mode 100644
index 3c36d3f03c1..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/test/display_aggregates_only_test.cc
+++ /dev/null
@@ -1,43 +0,0 @@
-
-#undef NDEBUG
-#include <cstdio>
-#include <string>
-
-#include "benchmark/benchmark.h"
-#include "output_test.h"
-
-// Ok this test is super ugly. We want to check what happens with the file
-// reporter in the presence of DisplayAggregatesOnly().
-// We do not care about console output, the normal tests check that already.
-
-void BM_SummaryRepeat(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_SummaryRepeat)->Repetitions(3)->DisplayAggregatesOnly();
-
-int main(int argc, char* argv[]) {
-  const std::string output = GetFileReporterOutput(argc, argv);
-
-  if (SubstrCnt(output, "\"name\": \"BM_SummaryRepeat/repeats:3") != 6 ||
-      SubstrCnt(output, "\"name\": \"BM_SummaryRepeat/repeats:3\"") != 3 ||
-      SubstrCnt(output, "\"name\": \"BM_SummaryRepeat/repeats:3_mean\"") != 1 ||
-      SubstrCnt(output, "\"name\": \"BM_SummaryRepeat/repeats:3_median\"") !=
-          1 ||
-      SubstrCnt(output, "\"name\": \"BM_SummaryRepeat/repeats:3_stddev\"") !=
-          1) {
-    std::cout << "Precondition mismatch. Expected to only find 6 "
-                 "occurrences of \"BM_SummaryRepeat/repeats:3\" substring:\n"
-                 "\"name\": \"BM_SummaryRepeat/repeats:3\", "
-                 "\"name\": \"BM_SummaryRepeat/repeats:3\", "
-                 "\"name\": \"BM_SummaryRepeat/repeats:3\", "
-                 "\"name\": \"BM_SummaryRepeat/repeats:3_mean\", "
-                 "\"name\": \"BM_SummaryRepeat/repeats:3_median\", "
-                 "\"name\": \"BM_SummaryRepeat/repeats:3_stddev\"\nThe entire "
-                 "output:\n";
-    std::cout << output;
-    return 1;
-  }
-
-  return 0;
-}
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/test/donotoptimize_assembly_test.cc b/gnu/llvm/libcxx/utils/google-benchmark/test/donotoptimize_assembly_test.cc
deleted file mode 100644
index d4b0bab70e7..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/test/donotoptimize_assembly_test.cc
+++ /dev/null
@@ -1,163 +0,0 @@
-#include <benchmark/benchmark.h>
-
-#ifdef __clang__
-#pragma clang diagnostic ignored "-Wreturn-type"
-#endif
-
-extern "C" {
-
-extern int ExternInt;
-extern int ExternInt2;
-extern int ExternInt3;
-
-inline int Add42(int x) { return x + 42; }
-
-struct NotTriviallyCopyable {
-  NotTriviallyCopyable();
-  explicit NotTriviallyCopyable(int x) : value(x) {}
-  NotTriviallyCopyable(NotTriviallyCopyable const&);
-  int value;
-};
-
-struct Large {
-  int value;
-  int data[2];
-};
-
-}
-// CHECK-LABEL: test_with_rvalue:
-extern "C" void test_with_rvalue() {
-  benchmark::DoNotOptimize(Add42(0));
-  // CHECK: movl $42, %eax
-  // CHECK: ret
-}
-
-// CHECK-LABEL: test_with_large_rvalue:
-extern "C" void test_with_large_rvalue() {
-  benchmark::DoNotOptimize(Large{ExternInt, {ExternInt, ExternInt}});
-  // CHECK: ExternInt(%rip)
-  // CHECK: movl %eax, -{{[0-9]+}}(%[[REG:[a-z]+]]
-  // CHECK: movl %eax, -{{[0-9]+}}(%[[REG]])
-  // CHECK: movl %eax, -{{[0-9]+}}(%[[REG]])
-  // CHECK: ret
-}
-
-// CHECK-LABEL: test_with_non_trivial_rvalue:
-extern "C" void test_with_non_trivial_rvalue() {
-  benchmark::DoNotOptimize(NotTriviallyCopyable(ExternInt));
-  // CHECK: mov{{l|q}} ExternInt(%rip)
-  // CHECK: ret
-}
-
-// CHECK-LABEL: test_with_lvalue:
-extern "C" void test_with_lvalue() {
-  int x = 101;
-  benchmark::DoNotOptimize(x);
-  // CHECK-GNU: movl $101, %eax
-  // CHECK-CLANG: movl $101, -{{[0-9]+}}(%[[REG:[a-z]+]])
-  // CHECK: ret
-}
-
-// CHECK-LABEL: test_with_large_lvalue:
-extern "C" void test_with_large_lvalue() {
-  Large L{ExternInt, {ExternInt, ExternInt}};
-  benchmark::DoNotOptimize(L);
-  // CHECK: ExternInt(%rip)
-  // CHECK: movl %eax, -{{[0-9]+}}(%[[REG:[a-z]+]])
-  // CHECK: movl %eax, -{{[0-9]+}}(%[[REG]])
-  // CHECK: movl %eax, -{{[0-9]+}}(%[[REG]])
-  // CHECK: ret
-}
-
-// CHECK-LABEL: test_with_non_trivial_lvalue:
-extern "C" void test_with_non_trivial_lvalue() {
-  NotTriviallyCopyable NTC(ExternInt);
-  benchmark::DoNotOptimize(NTC);
-  // CHECK: ExternInt(%rip)
-  // CHECK: movl %eax, -{{[0-9]+}}(%[[REG:[a-z]+]])
-  // CHECK: ret
-}
-
-// CHECK-LABEL: test_with_const_lvalue:
-extern "C" void test_with_const_lvalue() {
-  const int x = 123;
-  benchmark::DoNotOptimize(x);
-  // CHECK: movl $123, %eax
-  // CHECK: ret
-}
-
-// CHECK-LABEL: test_with_large_const_lvalue:
-extern "C" void test_with_large_const_lvalue() {
-  const Large L{ExternInt, {ExternInt, ExternInt}};
-  benchmark::DoNotOptimize(L);
-  // CHECK: ExternInt(%rip)
-  // CHECK: movl %eax, -{{[0-9]+}}(%[[REG:[a-z]+]])
-  // CHECK: movl %eax, -{{[0-9]+}}(%[[REG]])
-  // CHECK: movl %eax, -{{[0-9]+}}(%[[REG]])
-  // CHECK: ret
-}
-
-// CHECK-LABEL: test_with_non_trivial_const_lvalue:
-extern "C" void test_with_non_trivial_const_lvalue() {
-  const NotTriviallyCopyable Obj(ExternInt);
-  benchmark::DoNotOptimize(Obj);
-  // CHECK: mov{{q|l}} ExternInt(%rip)
-  // CHECK: ret
-}
-
-// CHECK-LABEL: test_div_by_two:
-extern "C" int test_div_by_two(int input) {
-  int divisor = 2;
-  benchmark::DoNotOptimize(divisor);
-  return input / divisor;
-  // CHECK: movl $2, [[DEST:.*]]
-  // CHECK: idivl [[DEST]]
-  // CHECK: ret
-}
-
-// CHECK-LABEL: test_inc_integer:
-extern "C" int test_inc_integer() {
-  int x = 0;
-  for (int i=0; i < 5; ++i)
-    benchmark::DoNotOptimize(++x);
-  // CHECK: movl $1, [[DEST:.*]]
-  // CHECK: {{(addl \$1,|incl)}} [[DEST]]
-  // CHECK: {{(addl \$1,|incl)}} [[DEST]]
-  // CHECK: {{(addl \$1,|incl)}} [[DEST]]
-  // CHECK: {{(addl \$1,|incl)}} [[DEST]]
-  // CHECK-CLANG: movl [[DEST]], %eax
-  // CHECK: ret
-  return x;
-}
-
-// CHECK-LABEL: test_pointer_rvalue
-extern "C" void test_pointer_rvalue() {
-  // CHECK: movl $42, [[DEST:.*]]
-  // CHECK: leaq [[DEST]], %rax
-  // CHECK-CLANG: movq %rax, -{{[0-9]+}}(%[[REG:[a-z]+]])
-  // CHECK: ret
-  int x = 42;
-  benchmark::DoNotOptimize(&x);
-}
-
-// CHECK-LABEL: test_pointer_const_lvalue:
-extern "C" void test_pointer_const_lvalue() {
-  // CHECK: movl $42, [[DEST:.*]]
-  // CHECK: leaq [[DEST]], %rax
-  // CHECK-CLANG: movq %rax, -{{[0-9]+}}(%[[REG:[a-z]+]])
-  // CHECK: ret
-  int x = 42;
-  int * const xp = &x;
-  benchmark::DoNotOptimize(xp);
-}
-
-// CHECK-LABEL: test_pointer_lvalue:
-extern "C" void test_pointer_lvalue() {
-  // CHECK: movl $42, [[DEST:.*]]
-  // CHECK: leaq [[DEST]], %rax
-  // CHECK-CLANG: movq %rax, -{{[0-9]+}}(%[[REG:[a-z+]+]])
-  // CHECK: ret
-  int x = 42;
-  int *xp = &x;
-  benchmark::DoNotOptimize(xp);
-}
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/test/donotoptimize_test.cc b/gnu/llvm/libcxx/utils/google-benchmark/test/donotoptimize_test.cc
deleted file mode 100644
index 2ce92d1c72b..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/test/donotoptimize_test.cc
+++ /dev/null
@@ -1,52 +0,0 @@
-#include "benchmark/benchmark.h"
-
-#include <cstdint>
-
-namespace {
-#if defined(__GNUC__)
-std::uint64_t double_up(const std::uint64_t x) __attribute__((const));
-#endif
-std::uint64_t double_up(const std::uint64_t x) { return x * 2; }
-}
-
-// Using DoNotOptimize on types like BitRef seem to cause a lot of problems
-// with the inline assembly on both GCC and Clang.
-struct BitRef {
-  int index;
-  unsigned char &byte;
-
-public:
-  static BitRef Make() {
-    static unsigned char arr[2] = {};
-    BitRef b(1, arr[0]);
-    return b;
-  }
-private:
-  BitRef(int i, unsigned char& b) : index(i), byte(b) {}
-};
-
-int main(int, char*[]) {
-  // this test verifies compilation of DoNotOptimize() for some types
-
-  char buffer8[8] = "";
-  benchmark::DoNotOptimize(buffer8);
-
-  char buffer20[20] = "";
-  benchmark::DoNotOptimize(buffer20);
-
-  char buffer1024[1024] = "";
-  benchmark::DoNotOptimize(buffer1024);
-  benchmark::DoNotOptimize(&buffer1024[0]);
-
-  int x = 123;
-  benchmark::DoNotOptimize(x);
-  benchmark::DoNotOptimize(&x);
-  benchmark::DoNotOptimize(x += 42);
-
-  benchmark::DoNotOptimize(double_up(x));
-
-  // These tests are to e
-  benchmark::DoNotOptimize(BitRef::Make());
-  BitRef lval = BitRef::Make();
-  benchmark::DoNotOptimize(lval);
-}
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/test/filter_test.cc b/gnu/llvm/libcxx/utils/google-benchmark/test/filter_test.cc
deleted file mode 100644
index 0e27065c155..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/test/filter_test.cc
+++ /dev/null
@@ -1,104 +0,0 @@
-#include "benchmark/benchmark.h"
-
-#include <cassert>
-#include <cmath>
-#include <cstdint>
-#include <cstdlib>
-
-#include <iostream>
-#include <limits>
-#include <sstream>
-#include <string>
-
-namespace {
-
-class TestReporter : public benchmark::ConsoleReporter {
- public:
-  virtual bool ReportContext(const Context& context) {
-    return ConsoleReporter::ReportContext(context);
-  };
-
-  virtual void ReportRuns(const std::vector<Run>& report) {
-    ++count_;
-    ConsoleReporter::ReportRuns(report);
-  };
-
-  TestReporter() : count_(0) {}
-
-  virtual ~TestReporter() {}
-
-  size_t GetCount() const { return count_; }
-
- private:
-  mutable size_t count_;
-};
-
-}  // end namespace
-
-static void NoPrefix(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(NoPrefix);
-
-static void BM_Foo(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_Foo);
-
-static void BM_Bar(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_Bar);
-
-static void BM_FooBar(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_FooBar);
-
-static void BM_FooBa(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_FooBa);
-
-int main(int argc, char **argv) {
-  bool list_only = false;
-  for (int i = 0; i < argc; ++i)
-    list_only |= std::string(argv[i]).find("--benchmark_list_tests") !=
-                 std::string::npos;
-
-  benchmark::Initialize(&argc, argv);
-
-  TestReporter test_reporter;
-  const size_t returned_count =
-      benchmark::RunSpecifiedBenchmarks(&test_reporter);
-
-  if (argc == 2) {
-    // Make sure we ran all of the tests
-    std::stringstream ss(argv[1]);
-    size_t expected_return;
-    ss >> expected_return;
-
-    if (returned_count != expected_return) {
-      std::cerr << "ERROR: Expected " << expected_return
-                << " tests to match the filter but returned_count = "
-                << returned_count << std::endl;
-      return -1;
-    }
-
-    const size_t expected_reports = list_only ? 0 : expected_return;
-    const size_t reports_count = test_reporter.GetCount();
-    if (reports_count != expected_reports) {
-      std::cerr << "ERROR: Expected " << expected_reports
-                << " tests to be run but reported_count = " << reports_count
-                << std::endl;
-      return -1;
-    }
-  }
-
-  return 0;
-}
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/test/fixture_test.cc b/gnu/llvm/libcxx/utils/google-benchmark/test/fixture_test.cc
deleted file mode 100644
index 1462b10f02f..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/test/fixture_test.cc
+++ /dev/null
@@ -1,49 +0,0 @@
-
-#include "benchmark/benchmark.h"
-
-#include <cassert>
-#include <memory>
-
-class MyFixture : public ::benchmark::Fixture {
- public:
-  void SetUp(const ::benchmark::State& state) {
-    if (state.thread_index == 0) {
-      assert(data.get() == nullptr);
-      data.reset(new int(42));
-    }
-  }
-
-  void TearDown(const ::benchmark::State& state) {
-    if (state.thread_index == 0) {
-      assert(data.get() != nullptr);
-      data.reset();
-    }
-  }
-
-  ~MyFixture() { assert(data == nullptr); }
-
-  std::unique_ptr<int> data;
-};
-
-BENCHMARK_F(MyFixture, Foo)(benchmark::State &st) {
-  assert(data.get() != nullptr);
-  assert(*data == 42);
-  for (auto _ : st) {
-  }
-}
-
-BENCHMARK_DEFINE_F(MyFixture, Bar)(benchmark::State& st) {
-  if (st.thread_index == 0) {
-    assert(data.get() != nullptr);
-    assert(*data == 42);
-  }
-  for (auto _ : st) {
-    assert(data.get() != nullptr);
-    assert(*data == 42);
-  }
-  st.SetItemsProcessed(st.range(0));
-}
-BENCHMARK_REGISTER_F(MyFixture, Bar)->Arg(42);
-BENCHMARK_REGISTER_F(MyFixture, Bar)->Arg(42)->ThreadPerCpu();
-
-BENCHMARK_MAIN();
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/test/internal_threading_test.cc b/gnu/llvm/libcxx/utils/google-benchmark/test/internal_threading_test.cc
deleted file mode 100644
index 039d7c14a8c..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/test/internal_threading_test.cc
+++ /dev/null
@@ -1,184 +0,0 @@
-
-#undef NDEBUG
-
-#include <chrono>
-#include <thread>
-#include "../src/timers.h"
-#include "benchmark/benchmark.h"
-#include "output_test.h"
-
-static const std::chrono::duration<double, std::milli> time_frame(50);
-static const double time_frame_in_sec(
-    std::chrono::duration_cast<std::chrono::duration<double, std::ratio<1, 1>>>(
-        time_frame)
-        .count());
-
-void MyBusySpinwait() {
-  const auto start = benchmark::ChronoClockNow();
-
-  while (true) {
-    const auto now = benchmark::ChronoClockNow();
-    const auto elapsed = now - start;
-
-    if (std::chrono::duration<double, std::chrono::seconds::period>(elapsed) >=
-        time_frame)
-      return;
-  }
-}
-
-// ========================================================================= //
-// --------------------------- TEST CASES BEGIN ---------------------------- //
-// ========================================================================= //
-
-// ========================================================================= //
-// BM_MainThread
-
-void BM_MainThread(benchmark::State& state) {
-  for (auto _ : state) {
-    MyBusySpinwait();
-    state.SetIterationTime(time_frame_in_sec);
-  }
-  state.counters["invtime"] =
-      benchmark::Counter{1, benchmark::Counter::kIsRate};
-}
-
-BENCHMARK(BM_MainThread)->Iterations(1)->Threads(1);
-BENCHMARK(BM_MainThread)->Iterations(1)->Threads(1)->UseRealTime();
-BENCHMARK(BM_MainThread)->Iterations(1)->Threads(1)->UseManualTime();
-BENCHMARK(BM_MainThread)->Iterations(1)->Threads(1)->MeasureProcessCPUTime();
-BENCHMARK(BM_MainThread)
-    ->Iterations(1)
-    ->Threads(1)
-    ->MeasureProcessCPUTime()
-    ->UseRealTime();
-BENCHMARK(BM_MainThread)
-    ->Iterations(1)
-    ->Threads(1)
-    ->MeasureProcessCPUTime()
-    ->UseManualTime();
-
-BENCHMARK(BM_MainThread)->Iterations(1)->Threads(2);
-BENCHMARK(BM_MainThread)->Iterations(1)->Threads(2)->UseRealTime();
-BENCHMARK(BM_MainThread)->Iterations(1)->Threads(2)->UseManualTime();
-BENCHMARK(BM_MainThread)->Iterations(1)->Threads(2)->MeasureProcessCPUTime();
-BENCHMARK(BM_MainThread)
-    ->Iterations(1)
-    ->Threads(2)
-    ->MeasureProcessCPUTime()
-    ->UseRealTime();
-BENCHMARK(BM_MainThread)
-    ->Iterations(1)
-    ->Threads(2)
-    ->MeasureProcessCPUTime()
-    ->UseManualTime();
-
-// ========================================================================= //
-// BM_WorkerThread
-
-void BM_WorkerThread(benchmark::State& state) {
-  for (auto _ : state) {
-    std::thread Worker(&MyBusySpinwait);
-    Worker.join();
-    state.SetIterationTime(time_frame_in_sec);
-  }
-  state.counters["invtime"] =
-      benchmark::Counter{1, benchmark::Counter::kIsRate};
-}
-
-BENCHMARK(BM_WorkerThread)->Iterations(1)->Threads(1);
-BENCHMARK(BM_WorkerThread)->Iterations(1)->Threads(1)->UseRealTime();
-BENCHMARK(BM_WorkerThread)->Iterations(1)->Threads(1)->UseManualTime();
-BENCHMARK(BM_WorkerThread)->Iterations(1)->Threads(1)->MeasureProcessCPUTime();
-BENCHMARK(BM_WorkerThread)
-    ->Iterations(1)
-    ->Threads(1)
-    ->MeasureProcessCPUTime()
-    ->UseRealTime();
-BENCHMARK(BM_WorkerThread)
-    ->Iterations(1)
-    ->Threads(1)
-    ->MeasureProcessCPUTime()
-    ->UseManualTime();
-
-BENCHMARK(BM_WorkerThread)->Iterations(1)->Threads(2);
-BENCHMARK(BM_WorkerThread)->Iterations(1)->Threads(2)->UseRealTime();
-BENCHMARK(BM_WorkerThread)->Iterations(1)->Threads(2)->UseManualTime();
-BENCHMARK(BM_WorkerThread)->Iterations(1)->Threads(2)->MeasureProcessCPUTime();
-BENCHMARK(BM_WorkerThread)
-    ->Iterations(1)
-    ->Threads(2)
-    ->MeasureProcessCPUTime()
-    ->UseRealTime();
-BENCHMARK(BM_WorkerThread)
-    ->Iterations(1)
-    ->Threads(2)
-    ->MeasureProcessCPUTime()
-    ->UseManualTime();
-
-// ========================================================================= //
-// BM_MainThreadAndWorkerThread
-
-void BM_MainThreadAndWorkerThread(benchmark::State& state) {
-  for (auto _ : state) {
-    std::thread Worker(&MyBusySpinwait);
-    MyBusySpinwait();
-    Worker.join();
-    state.SetIterationTime(time_frame_in_sec);
-  }
-  state.counters["invtime"] =
-      benchmark::Counter{1, benchmark::Counter::kIsRate};
-}
-
-BENCHMARK(BM_MainThreadAndWorkerThread)->Iterations(1)->Threads(1);
-BENCHMARK(BM_MainThreadAndWorkerThread)
-    ->Iterations(1)
-    ->Threads(1)
-    ->UseRealTime();
-BENCHMARK(BM_MainThreadAndWorkerThread)
-    ->Iterations(1)
-    ->Threads(1)
-    ->UseManualTime();
-BENCHMARK(BM_MainThreadAndWorkerThread)
-    ->Iterations(1)
-    ->Threads(1)
-    ->MeasureProcessCPUTime();
-BENCHMARK(BM_MainThreadAndWorkerThread)
-    ->Iterations(1)
-    ->Threads(1)
-    ->MeasureProcessCPUTime()
-    ->UseRealTime();
-BENCHMARK(BM_MainThreadAndWorkerThread)
-    ->Iterations(1)
-    ->Threads(1)
-    ->MeasureProcessCPUTime()
-    ->UseManualTime();
-
-BENCHMARK(BM_MainThreadAndWorkerThread)->Iterations(1)->Threads(2);
-BENCHMARK(BM_MainThreadAndWorkerThread)
-    ->Iterations(1)
-    ->Threads(2)
-    ->UseRealTime();
-BENCHMARK(BM_MainThreadAndWorkerThread)
-    ->Iterations(1)
-    ->Threads(2)
-    ->UseManualTime();
-BENCHMARK(BM_MainThreadAndWorkerThread)
-    ->Iterations(1)
-    ->Threads(2)
-    ->MeasureProcessCPUTime();
-BENCHMARK(BM_MainThreadAndWorkerThread)
-    ->Iterations(1)
-    ->Threads(2)
-    ->MeasureProcessCPUTime()
-    ->UseRealTime();
-BENCHMARK(BM_MainThreadAndWorkerThread)
-    ->Iterations(1)
-    ->Threads(2)
-    ->MeasureProcessCPUTime()
-    ->UseManualTime();
-
-// ========================================================================= //
-// ---------------------------- TEST CASES END ----------------------------- //
-// ========================================================================= //
-
-int main(int argc, char* argv[]) { RunOutputTests(argc, argv); }
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/test/link_main_test.cc b/gnu/llvm/libcxx/utils/google-benchmark/test/link_main_test.cc
deleted file mode 100644
index 241ad5c3905..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/test/link_main_test.cc
+++ /dev/null
@@ -1,8 +0,0 @@
-#include "benchmark/benchmark.h"
-
-void BM_empty(benchmark::State& state) {
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(state.iterations());
-  }
-}
-BENCHMARK(BM_empty);
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/test/map_test.cc b/gnu/llvm/libcxx/utils/google-benchmark/test/map_test.cc
deleted file mode 100644
index dbf7982a368..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/test/map_test.cc
+++ /dev/null
@@ -1,57 +0,0 @@
-#include "benchmark/benchmark.h"
-
-#include <cstdlib>
-#include <map>
-
-namespace {
-
-std::map<int, int> ConstructRandomMap(int size) {
-  std::map<int, int> m;
-  for (int i = 0; i < size; ++i) {
-    m.insert(std::make_pair(std::rand() % size, std::rand() % size));
-  }
-  return m;
-}
-
-}  // namespace
-
-// Basic version.
-static void BM_MapLookup(benchmark::State& state) {
-  const int size = static_cast<int>(state.range(0));
-  std::map<int, int> m;
-  for (auto _ : state) {
-    state.PauseTiming();
-    m = ConstructRandomMap(size);
-    state.ResumeTiming();
-    for (int i = 0; i < size; ++i) {
-      benchmark::DoNotOptimize(m.find(std::rand() % size));
-    }
-  }
-  state.SetItemsProcessed(state.iterations() * size);
-}
-BENCHMARK(BM_MapLookup)->Range(1 << 3, 1 << 12);
-
-// Using fixtures.
-class MapFixture : public ::benchmark::Fixture {
- public:
-  void SetUp(const ::benchmark::State& st) {
-    m = ConstructRandomMap(static_cast<int>(st.range(0)));
-  }
-
-  void TearDown(const ::benchmark::State&) { m.clear(); }
-
-  std::map<int, int> m;
-};
-
-BENCHMARK_DEFINE_F(MapFixture, Lookup)(benchmark::State& state) {
-  const int size = static_cast<int>(state.range(0));
-  for (auto _ : state) {
-    for (int i = 0; i < size; ++i) {
-      benchmark::DoNotOptimize(m.find(std::rand() % size));
-    }
-  }
-  state.SetItemsProcessed(state.iterations() * size);
-}
-BENCHMARK_REGISTER_F(MapFixture, Lookup)->Range(1 << 3, 1 << 12);
-
-BENCHMARK_MAIN();
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/test/memory_manager_test.cc b/gnu/llvm/libcxx/utils/google-benchmark/test/memory_manager_test.cc
deleted file mode 100644
index 94be6083795..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/test/memory_manager_test.cc
+++ /dev/null
@@ -1,42 +0,0 @@
-#include <memory>
-
-#include "../src/check.h"
-#include "benchmark/benchmark.h"
-#include "output_test.h"
-
-class TestMemoryManager : public benchmark::MemoryManager {
-  void Start() {}
-  void Stop(Result* result) {
-    result->num_allocs = 42;
-    result->max_bytes_used = 42000;
-  }
-};
-
-void BM_empty(benchmark::State& state) {
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(state.iterations());
-  }
-}
-BENCHMARK(BM_empty);
-
-ADD_CASES(TC_ConsoleOut, {{"^BM_empty %console_report$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_empty\",$"},
-                       {"\"run_name\": \"BM_empty\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"iterations\": %int,$", MR_Next},
-                       {"\"real_time\": %float,$", MR_Next},
-                       {"\"cpu_time\": %float,$", MR_Next},
-                       {"\"time_unit\": \"ns\",$", MR_Next},
-                       {"\"allocs_per_iter\": %float,$", MR_Next},
-                       {"\"max_bytes_used\": 42000$", MR_Next},
-                       {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_empty\",%csv_report$"}});
-
-
-int main(int argc, char *argv[]) {
-  std::unique_ptr<benchmark::MemoryManager> mm(new TestMemoryManager());
-
-  benchmark::RegisterMemoryManager(mm.get());
-  RunOutputTests(argc, argv);
-  benchmark::RegisterMemoryManager(nullptr);
-}
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/test/multiple_ranges_test.cc b/gnu/llvm/libcxx/utils/google-benchmark/test/multiple_ranges_test.cc
deleted file mode 100644
index c64acabc25c..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/test/multiple_ranges_test.cc
+++ /dev/null
@@ -1,97 +0,0 @@
-#include "benchmark/benchmark.h"
-
-#include <cassert>
-#include <iostream>
-#include <set>
-#include <vector>
-
-class MultipleRangesFixture : public ::benchmark::Fixture {
- public:
-  MultipleRangesFixture()
-      : expectedValues({{1, 3, 5},
-                        {1, 3, 8},
-                        {1, 3, 15},
-                        {2, 3, 5},
-                        {2, 3, 8},
-                        {2, 3, 15},
-                        {1, 4, 5},
-                        {1, 4, 8},
-                        {1, 4, 15},
-                        {2, 4, 5},
-                        {2, 4, 8},
-                        {2, 4, 15},
-                        {1, 7, 5},
-                        {1, 7, 8},
-                        {1, 7, 15},
-                        {2, 7, 5},
-                        {2, 7, 8},
-                        {2, 7, 15},
-                        {7, 6, 3}}) {}
-
-  void SetUp(const ::benchmark::State& state) {
-    std::vector<int64_t> ranges = {state.range(0), state.range(1),
-                                   state.range(2)};
-
-    assert(expectedValues.find(ranges) != expectedValues.end());
-
-    actualValues.insert(ranges);
-  }
-
-  // NOTE: This is not TearDown as we want to check after _all_ runs are
-  // complete.
-  virtual ~MultipleRangesFixture() {
-    assert(actualValues.size() == expectedValues.size());
-    if (actualValues.size() != expectedValues.size()) {
-      std::cout << "EXPECTED\n";
-      for (auto v : expectedValues) {
-        std::cout << "{";
-        for (int64_t iv : v) {
-          std::cout << iv << ", ";
-        }
-        std::cout << "}\n";
-      }
-      std::cout << "ACTUAL\n";
-      for (auto v : actualValues) {
-        std::cout << "{";
-        for (int64_t iv : v) {
-          std::cout << iv << ", ";
-        }
-        std::cout << "}\n";
-      }
-    }
-  }
-
-  std::set<std::vector<int64_t>> expectedValues;
-  std::set<std::vector<int64_t>> actualValues;
-};
-
-BENCHMARK_DEFINE_F(MultipleRangesFixture, Empty)(benchmark::State& state) {
-  for (auto _ : state) {
-    int64_t product = state.range(0) * state.range(1) * state.range(2);
-    for (int64_t x = 0; x < product; x++) {
-      benchmark::DoNotOptimize(x);
-    }
-  }
-}
-
-BENCHMARK_REGISTER_F(MultipleRangesFixture, Empty)
-    ->RangeMultiplier(2)
-    ->Ranges({{1, 2}, {3, 7}, {5, 15}})
-    ->Args({7, 6, 3});
-
-void BM_CheckDefaultArgument(benchmark::State& state) {
-  // Test that the 'range()' without an argument is the same as 'range(0)'.
-  assert(state.range() == state.range(0));
-  assert(state.range() != state.range(1));
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_CheckDefaultArgument)->Ranges({{1, 5}, {6, 10}});
-
-static void BM_MultipleRanges(benchmark::State& st) {
-  for (auto _ : st) {
-  }
-}
-BENCHMARK(BM_MultipleRanges)->Ranges({{5, 5}, {6, 6}});
-
-BENCHMARK_MAIN();
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/test/options_test.cc b/gnu/llvm/libcxx/utils/google-benchmark/test/options_test.cc
deleted file mode 100644
index fdec69174ee..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/test/options_test.cc
+++ /dev/null
@@ -1,65 +0,0 @@
-#include "benchmark/benchmark.h"
-#include <chrono>
-#include <thread>
-
-#if defined(NDEBUG)
-#undef NDEBUG
-#endif
-#include <cassert>
-
-void BM_basic(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-
-void BM_basic_slow(benchmark::State& state) {
-  std::chrono::milliseconds sleep_duration(state.range(0));
-  for (auto _ : state) {
-    std::this_thread::sleep_for(
-        std::chrono::duration_cast<std::chrono::nanoseconds>(sleep_duration));
-  }
-}
-
-BENCHMARK(BM_basic);
-BENCHMARK(BM_basic)->Arg(42);
-BENCHMARK(BM_basic_slow)->Arg(10)->Unit(benchmark::kNanosecond);
-BENCHMARK(BM_basic_slow)->Arg(100)->Unit(benchmark::kMicrosecond);
-BENCHMARK(BM_basic_slow)->Arg(1000)->Unit(benchmark::kMillisecond);
-BENCHMARK(BM_basic)->Range(1, 8);
-BENCHMARK(BM_basic)->RangeMultiplier(2)->Range(1, 8);
-BENCHMARK(BM_basic)->DenseRange(10, 15);
-BENCHMARK(BM_basic)->Args({42, 42});
-BENCHMARK(BM_basic)->Ranges({{64, 512}, {64, 512}});
-BENCHMARK(BM_basic)->MinTime(0.7);
-BENCHMARK(BM_basic)->UseRealTime();
-BENCHMARK(BM_basic)->ThreadRange(2, 4);
-BENCHMARK(BM_basic)->ThreadPerCpu();
-BENCHMARK(BM_basic)->Repetitions(3);
-
-void CustomArgs(benchmark::internal::Benchmark* b) {
-  for (int i = 0; i < 10; ++i) {
-    b->Arg(i);
-  }
-}
-
-BENCHMARK(BM_basic)->Apply(CustomArgs);
-
-void BM_explicit_iteration_count(benchmark::State& state) {
-  // Test that benchmarks specified with an explicit iteration count are
-  // only run once.
-  static bool invoked_before = false;
-  assert(!invoked_before);
-  invoked_before = true;
-
-  // Test that the requested iteration count is respected.
-  assert(state.max_iterations == 42);
-  size_t actual_iterations = 0;
-  for (auto _ : state)
-    ++actual_iterations;
-  assert(state.iterations() == state.max_iterations);
-  assert(state.iterations() == 42);
-
-}
-BENCHMARK(BM_explicit_iteration_count)->Iterations(42);
-
-BENCHMARK_MAIN();
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/test/output_test.h b/gnu/llvm/libcxx/utils/google-benchmark/test/output_test.h
deleted file mode 100644
index 9385761b214..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/test/output_test.h
+++ /dev/null
@@ -1,213 +0,0 @@
-#ifndef TEST_OUTPUT_TEST_H
-#define TEST_OUTPUT_TEST_H
-
-#undef NDEBUG
-#include <functional>
-#include <initializer_list>
-#include <memory>
-#include <sstream>
-#include <string>
-#include <utility>
-#include <vector>
-
-#include "../src/re.h"
-#include "benchmark/benchmark.h"
-
-#define CONCAT2(x, y) x##y
-#define CONCAT(x, y) CONCAT2(x, y)
-
-#define ADD_CASES(...) int CONCAT(dummy, __LINE__) = ::AddCases(__VA_ARGS__)
-
-#define SET_SUBSTITUTIONS(...) \
-  int CONCAT(dummy, __LINE__) = ::SetSubstitutions(__VA_ARGS__)
-
-enum MatchRules {
-  MR_Default,  // Skip non-matching lines until a match is found.
-  MR_Next,     // Match must occur on the next line.
-  MR_Not  // No line between the current position and the next match matches
-          // the regex
-};
-
-struct TestCase {
-  TestCase(std::string re, int rule = MR_Default);
-
-  std::string regex_str;
-  int match_rule;
-  std::string substituted_regex;
-  std::shared_ptr<benchmark::Regex> regex;
-};
-
-enum TestCaseID {
-  TC_ConsoleOut,
-  TC_ConsoleErr,
-  TC_JSONOut,
-  TC_JSONErr,
-  TC_CSVOut,
-  TC_CSVErr,
-
-  TC_NumID  // PRIVATE
-};
-
-// Add a list of test cases to be run against the output specified by
-// 'ID'
-int AddCases(TestCaseID ID, std::initializer_list<TestCase> il);
-
-// Add or set a list of substitutions to be performed on constructed regex's
-// See 'output_test_helper.cc' for a list of default substitutions.
-int SetSubstitutions(
-    std::initializer_list<std::pair<std::string, std::string>> il);
-
-// Run all output tests.
-void RunOutputTests(int argc, char* argv[]);
-
-// Count the number of 'pat' substrings in the 'haystack' string.
-int SubstrCnt(const std::string& haystack, const std::string& pat);
-
-// Run registered benchmarks with file reporter enabled, and return the content
-// outputted by the file reporter.
-std::string GetFileReporterOutput(int argc, char* argv[]);
-
-// ========================================================================= //
-// ------------------------- Results checking ------------------------------ //
-// ========================================================================= //
-
-// Call this macro to register a benchmark for checking its results. This
-// should be all that's needed. It subscribes a function to check the (CSV)
-// results of a benchmark. This is done only after verifying that the output
-// strings are really as expected.
-// bm_name_pattern: a name or a regex pattern which will be matched against
-//                  all the benchmark names. Matching benchmarks
-//                  will be the subject of a call to checker_function
-// checker_function: should be of type ResultsCheckFn (see below)
-#define CHECK_BENCHMARK_RESULTS(bm_name_pattern, checker_function) \
-  size_t CONCAT(dummy, __LINE__) = AddChecker(bm_name_pattern, checker_function)
-
-struct Results;
-typedef std::function<void(Results const&)> ResultsCheckFn;
-
-size_t AddChecker(const char* bm_name_pattern, ResultsCheckFn fn);
-
-// Class holding the results of a benchmark.
-// It is passed in calls to checker functions.
-struct Results {
-  // the benchmark name
-  std::string name;
-  // the benchmark fields
-  std::map<std::string, std::string> values;
-
-  Results(const std::string& n) : name(n) {}
-
-  int NumThreads() const;
-
-  double NumIterations() const;
-
-  typedef enum { kCpuTime, kRealTime } BenchmarkTime;
-
-  // get cpu_time or real_time in seconds
-  double GetTime(BenchmarkTime which) const;
-
-  // get the real_time duration of the benchmark in seconds.
-  // it is better to use fuzzy float checks for this, as the float
-  // ASCII formatting is lossy.
-  double DurationRealTime() const {
-    return NumIterations() * GetTime(kRealTime);
-  }
-  // get the cpu_time duration of the benchmark in seconds
-  double DurationCPUTime() const {
-    return NumIterations() * GetTime(kCpuTime);
-  }
-
-  // get the string for a result by name, or nullptr if the name
-  // is not found
-  const std::string* Get(const char* entry_name) const {
-    auto it = values.find(entry_name);
-    if (it == values.end()) return nullptr;
-    return &it->second;
-  }
-
-  // get a result by name, parsed as a specific type.
-  // NOTE: for counters, use GetCounterAs instead.
-  template <class T>
-  T GetAs(const char* entry_name) const;
-
-  // counters are written as doubles, so they have to be read first
-  // as a double, and only then converted to the asked type.
-  template <class T>
-  T GetCounterAs(const char* entry_name) const {
-    double dval = GetAs<double>(entry_name);
-    T tval = static_cast<T>(dval);
-    return tval;
-  }
-};
-
-template <class T>
-T Results::GetAs(const char* entry_name) const {
-  auto* sv = Get(entry_name);
-  CHECK(sv != nullptr && !sv->empty());
-  std::stringstream ss;
-  ss << *sv;
-  T out;
-  ss >> out;
-  CHECK(!ss.fail());
-  return out;
-}
-
-//----------------------------------
-// Macros to help in result checking. Do not use them with arguments causing
-// side-effects.
-
-// clang-format off
-
-#define _CHECK_RESULT_VALUE(entry, getfn, var_type, var_name, relationship, value) \
-    CONCAT(CHECK_, relationship)                                        \
-    (entry.getfn< var_type >(var_name), (value)) << "\n"                \
-    << __FILE__ << ":" << __LINE__ << ": " << (entry).name << ":\n"     \
-    << __FILE__ << ":" << __LINE__ << ": "                              \
-    << "expected (" << #var_type << ")" << (var_name)                   \
-    << "=" << (entry).getfn< var_type >(var_name)                       \
-    << " to be " #relationship " to " << (value) << "\n"
-
-// check with tolerance. eps_factor is the tolerance window, which is
-// interpreted relative to value (eg, 0.1 means 10% of value).
-#define _CHECK_FLOAT_RESULT_VALUE(entry, getfn, var_type, var_name, relationship, value, eps_factor) \
-    CONCAT(CHECK_FLOAT_, relationship)                                  \
-    (entry.getfn< var_type >(var_name), (value), (eps_factor) * (value)) << "\n" \
-    << __FILE__ << ":" << __LINE__ << ": " << (entry).name << ":\n"     \
-    << __FILE__ << ":" << __LINE__ << ": "                              \
-    << "expected (" << #var_type << ")" << (var_name)                   \
-    << "=" << (entry).getfn< var_type >(var_name)                       \
-    << " to be " #relationship " to " << (value) << "\n"                \
-    << __FILE__ << ":" << __LINE__ << ": "                              \
-    << "with tolerance of " << (eps_factor) * (value)                   \
-    << " (" << (eps_factor)*100. << "%), "                              \
-    << "but delta was " << ((entry).getfn< var_type >(var_name) - (value)) \
-    << " (" << (((entry).getfn< var_type >(var_name) - (value))         \
-               /                                                        \
-               ((value) > 1.e-5 || value < -1.e-5 ? value : 1.e-5)*100.) \
-    << "%)"
-
-#define CHECK_RESULT_VALUE(entry, var_type, var_name, relationship, value) \
-    _CHECK_RESULT_VALUE(entry, GetAs, var_type, var_name, relationship, value)
-
-#define CHECK_COUNTER_VALUE(entry, var_type, var_name, relationship, value) \
-    _CHECK_RESULT_VALUE(entry, GetCounterAs, var_type, var_name, relationship, value)
-
-#define CHECK_FLOAT_RESULT_VALUE(entry, var_name, relationship, value, eps_factor) \
-    _CHECK_FLOAT_RESULT_VALUE(entry, GetAs, double, var_name, relationship, value, eps_factor)
-
-#define CHECK_FLOAT_COUNTER_VALUE(entry, var_name, relationship, value, eps_factor) \
-    _CHECK_FLOAT_RESULT_VALUE(entry, GetCounterAs, double, var_name, relationship, value, eps_factor)
-
-// clang-format on
-
-// ========================================================================= //
-// --------------------------- Misc Utilities ------------------------------ //
-// ========================================================================= //
-
-namespace {
-
-const char* const dec_re = "[0-9]*[.]?[0-9]+([eE][-+][0-9]+)?";
-
-}  //  end namespace
-
-#endif  // TEST_OUTPUT_TEST_H
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/test/output_test_helper.cc b/gnu/llvm/libcxx/utils/google-benchmark/test/output_test_helper.cc
deleted file mode 100644
index 5dc951d2bca..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/test/output_test_helper.cc
+++ /dev/null
@@ -1,505 +0,0 @@
-#include <cstdio>
-#include <cstring>
-#include <fstream>
-#include <iostream>
-#include <map>
-#include <memory>
-#include <random>
-#include <sstream>
-#include <streambuf>
-
-#include "../src/benchmark_api_internal.h"
-#include "../src/check.h"  // NOTE: check.h is for internal use only!
-#include "../src/re.h"     // NOTE: re.h is for internal use only
-#include "output_test.h"
-
-// ========================================================================= //
-// ------------------------------ Internals -------------------------------- //
-// ========================================================================= //
-namespace internal {
-namespace {
-
-using TestCaseList = std::vector<TestCase>;
-
-// Use a vector because the order elements are added matters during iteration.
-// std::map/unordered_map don't guarantee that.
-// For example:
-//  SetSubstitutions({{"%HelloWorld", "Hello"}, {"%Hello", "Hi"}});
-//     Substitute("%HelloWorld") // Always expands to Hello.
-using SubMap = std::vector<std::pair<std::string, std::string>>;
-
-TestCaseList& GetTestCaseList(TestCaseID ID) {
-  // Uses function-local statics to ensure initialization occurs
-  // before first use.
-  static TestCaseList lists[TC_NumID];
-  return lists[ID];
-}
-
-SubMap& GetSubstitutions() {
-  // Don't use 'dec_re' from header because it may not yet be initialized.
-  // clang-format off
-  static std::string safe_dec_re = "[0-9]*[.]?[0-9]+([eE][-+][0-9]+)?";
-  static std::string time_re = "([0-9]+[.])?[0-9]+";
-  static SubMap map = {
-      {"%float", "[0-9]*[.]?[0-9]+([eE][-+][0-9]+)?"},
-      // human-readable float
-      {"%hrfloat", "[0-9]*[.]?[0-9]+([eE][-+][0-9]+)?[kMGTPEZYmunpfazy]?"},
-      {"%int", "[ ]*[0-9]+"},
-      {" %s ", "[ ]+"},
-      {"%time", "[ ]*" + time_re + "[ ]+ns"},
-      {"%console_report", "[ ]*" + time_re + "[ ]+ns [ ]*" + time_re + "[ ]+ns [ ]*[0-9]+"},
-      {"%console_time_only_report", "[ ]*" + time_re + "[ ]+ns [ ]*" + time_re + "[ ]+ns"},
-      {"%console_us_report", "[ ]*" + time_re + "[ ]+us [ ]*" + time_re + "[ ]+us [ ]*[0-9]+"},
-      {"%console_us_time_only_report", "[ ]*" + time_re + "[ ]+us [ ]*" + time_re + "[ ]+us"},
-      {"%csv_header",
-       "name,iterations,real_time,cpu_time,time_unit,bytes_per_second,"
-       "items_per_second,label,error_occurred,error_message"},
-      {"%csv_report", "[0-9]+," + safe_dec_re + "," + safe_dec_re + ",ns,,,,,"},
-      {"%csv_us_report", "[0-9]+," + safe_dec_re + "," + safe_dec_re + ",us,,,,,"},
-      {"%csv_bytes_report",
-       "[0-9]+," + safe_dec_re + "," + safe_dec_re + ",ns," + safe_dec_re + ",,,,"},
-      {"%csv_items_report",
-       "[0-9]+," + safe_dec_re + "," + safe_dec_re + ",ns,," + safe_dec_re + ",,,"},
-      {"%csv_bytes_items_report",
-       "[0-9]+," + safe_dec_re + "," + safe_dec_re + ",ns," + safe_dec_re +
-       "," + safe_dec_re + ",,,"},
-      {"%csv_label_report_begin", "[0-9]+," + safe_dec_re + "," + safe_dec_re + ",ns,,,"},
-      {"%csv_label_report_end", ",,"}};
-  // clang-format on
-  return map;
-}
-
-std::string PerformSubstitutions(std::string source) {
-  SubMap const& subs = GetSubstitutions();
-  using SizeT = std::string::size_type;
-  for (auto const& KV : subs) {
-    SizeT pos;
-    SizeT next_start = 0;
-    while ((pos = source.find(KV.first, next_start)) != std::string::npos) {
-      next_start = pos + KV.second.size();
-      source.replace(pos, KV.first.size(), KV.second);
-    }
-  }
-  return source;
-}
-
-void CheckCase(std::stringstream& remaining_output, TestCase const& TC,
-               TestCaseList const& not_checks) {
-  std::string first_line;
-  bool on_first = true;
-  std::string line;
-  while (remaining_output.eof() == false) {
-    CHECK(remaining_output.good());
-    std::getline(remaining_output, line);
-    if (on_first) {
-      first_line = line;
-      on_first = false;
-    }
-    for (const auto& NC : not_checks) {
-      CHECK(!NC.regex->Match(line))
-          << "Unexpected match for line \"" << line << "\" for MR_Not regex \""
-          << NC.regex_str << "\""
-          << "\n    actual regex string \"" << TC.substituted_regex << "\""
-          << "\n    started matching near: " << first_line;
-    }
-    if (TC.regex->Match(line)) return;
-    CHECK(TC.match_rule != MR_Next)
-        << "Expected line \"" << line << "\" to match regex \"" << TC.regex_str
-        << "\""
-        << "\n    actual regex string \"" << TC.substituted_regex << "\""
-        << "\n    started matching near: " << first_line;
-  }
-  CHECK(remaining_output.eof() == false)
-      << "End of output reached before match for regex \"" << TC.regex_str
-      << "\" was found"
-      << "\n    actual regex string \"" << TC.substituted_regex << "\""
-      << "\n    started matching near: " << first_line;
-}
-
-void CheckCases(TestCaseList const& checks, std::stringstream& output) {
-  std::vector<TestCase> not_checks;
-  for (size_t i = 0; i < checks.size(); ++i) {
-    const auto& TC = checks[i];
-    if (TC.match_rule == MR_Not) {
-      not_checks.push_back(TC);
-      continue;
-    }
-    CheckCase(output, TC, not_checks);
-    not_checks.clear();
-  }
-}
-
-class TestReporter : public benchmark::BenchmarkReporter {
- public:
-  TestReporter(std::vector<benchmark::BenchmarkReporter*> reps)
-      : reporters_(reps) {}
-
-  virtual bool ReportContext(const Context& context) {
-    bool last_ret = false;
-    bool first = true;
-    for (auto rep : reporters_) {
-      bool new_ret = rep->ReportContext(context);
-      CHECK(first || new_ret == last_ret)
-          << "Reports return different values for ReportContext";
-      first = false;
-      last_ret = new_ret;
-    }
-    (void)first;
-    return last_ret;
-  }
-
-  void ReportRuns(const std::vector<Run>& report) {
-    for (auto rep : reporters_) rep->ReportRuns(report);
-  }
-  void Finalize() {
-    for (auto rep : reporters_) rep->Finalize();
-  }
-
- private:
-  std::vector<benchmark::BenchmarkReporter*> reporters_;
-};
-}  // namespace
-
-}  // end namespace internal
-
-// ========================================================================= //
-// -------------------------- Results checking ----------------------------- //
-// ========================================================================= //
-
-namespace internal {
-
-// Utility class to manage subscribers for checking benchmark results.
-// It works by parsing the CSV output to read the results.
-class ResultsChecker {
- public:
-  struct PatternAndFn : public TestCase {  // reusing TestCase for its regexes
-    PatternAndFn(const std::string& rx, ResultsCheckFn fn_)
-        : TestCase(rx), fn(fn_) {}
-    ResultsCheckFn fn;
-  };
-
-  std::vector<PatternAndFn> check_patterns;
-  std::vector<Results> results;
-  std::vector<std::string> field_names;
-
-  void Add(const std::string& entry_pattern, ResultsCheckFn fn);
-
-  void CheckResults(std::stringstream& output);
-
- private:
-  void SetHeader_(const std::string& csv_header);
-  void SetValues_(const std::string& entry_csv_line);
-
-  std::vector<std::string> SplitCsv_(const std::string& line);
-};
-
-// store the static ResultsChecker in a function to prevent initialization
-// order problems
-ResultsChecker& GetResultsChecker() {
-  static ResultsChecker rc;
-  return rc;
-}
-
-// add a results checker for a benchmark
-void ResultsChecker::Add(const std::string& entry_pattern, ResultsCheckFn fn) {
-  check_patterns.emplace_back(entry_pattern, fn);
-}
-
-// check the results of all subscribed benchmarks
-void ResultsChecker::CheckResults(std::stringstream& output) {
-  // first reset the stream to the start
-  {
-    auto start = std::stringstream::pos_type(0);
-    // clear before calling tellg()
-    output.clear();
-    // seek to zero only when needed
-    if (output.tellg() > start) output.seekg(start);
-    // and just in case
-    output.clear();
-  }
-  // now go over every line and publish it to the ResultsChecker
-  std::string line;
-  bool on_first = true;
-  while (output.eof() == false) {
-    CHECK(output.good());
-    std::getline(output, line);
-    if (on_first) {
-      SetHeader_(line);  // this is important
-      on_first = false;
-      continue;
-    }
-    SetValues_(line);
-  }
-  // finally we can call the subscribed check functions
-  for (const auto& p : check_patterns) {
-    VLOG(2) << "--------------------------------\n";
-    VLOG(2) << "checking for benchmarks matching " << p.regex_str << "...\n";
-    for (const auto& r : results) {
-      if (!p.regex->Match(r.name)) {
-        VLOG(2) << p.regex_str << " is not matched by " << r.name << "\n";
-        continue;
-      } else {
-        VLOG(2) << p.regex_str << " is matched by " << r.name << "\n";
-      }
-      VLOG(1) << "Checking results of " << r.name << ": ... \n";
-      p.fn(r);
-      VLOG(1) << "Checking results of " << r.name << ": OK.\n";
-    }
-  }
-}
-
-// prepare for the names in this header
-void ResultsChecker::SetHeader_(const std::string& csv_header) {
-  field_names = SplitCsv_(csv_header);
-}
-
-// set the values for a benchmark
-void ResultsChecker::SetValues_(const std::string& entry_csv_line) {
-  if (entry_csv_line.empty()) return;  // some lines are empty
-  CHECK(!field_names.empty());
-  auto vals = SplitCsv_(entry_csv_line);
-  CHECK_EQ(vals.size(), field_names.size());
-  results.emplace_back(vals[0]);  // vals[0] is the benchmark name
-  auto& entry = results.back();
-  for (size_t i = 1, e = vals.size(); i < e; ++i) {
-    entry.values[field_names[i]] = vals[i];
-  }
-}
-
-// a quick'n'dirty csv splitter (eliminating quotes)
-std::vector<std::string> ResultsChecker::SplitCsv_(const std::string& line) {
-  std::vector<std::string> out;
-  if (line.empty()) return out;
-  if (!field_names.empty()) out.reserve(field_names.size());
-  size_t prev = 0, pos = line.find_first_of(','), curr = pos;
-  while (pos != line.npos) {
-    CHECK(curr > 0);
-    if (line[prev] == '"') ++prev;
-    if (line[curr - 1] == '"') --curr;
-    out.push_back(line.substr(prev, curr - prev));
-    prev = pos + 1;
-    pos = line.find_first_of(',', pos + 1);
-    curr = pos;
-  }
-  curr = line.size();
-  if (line[prev] == '"') ++prev;
-  if (line[curr - 1] == '"') --curr;
-  out.push_back(line.substr(prev, curr - prev));
-  return out;
-}
-
-}  // end namespace internal
-
-size_t AddChecker(const char* bm_name, ResultsCheckFn fn) {
-  auto& rc = internal::GetResultsChecker();
-  rc.Add(bm_name, fn);
-  return rc.results.size();
-}
-
-int Results::NumThreads() const {
-  auto pos = name.find("/threads:");
-  if (pos == name.npos) return 1;
-  auto end = name.find('/', pos + 9);
-  std::stringstream ss;
-  ss << name.substr(pos + 9, end);
-  int num = 1;
-  ss >> num;
-  CHECK(!ss.fail());
-  return num;
-}
-
-double Results::NumIterations() const {
-  return GetAs<double>("iterations");
-}
-
-double Results::GetTime(BenchmarkTime which) const {
-  CHECK(which == kCpuTime || which == kRealTime);
-  const char* which_str = which == kCpuTime ? "cpu_time" : "real_time";
-  double val = GetAs<double>(which_str);
-  auto unit = Get("time_unit");
-  CHECK(unit);
-  if (*unit == "ns") {
-    return val * 1.e-9;
-  } else if (*unit == "us") {
-    return val * 1.e-6;
-  } else if (*unit == "ms") {
-    return val * 1.e-3;
-  } else if (*unit == "s") {
-    return val;
-  } else {
-    CHECK(1 == 0) << "unknown time unit: " << *unit;
-    return 0;
-  }
-}
-
-// ========================================================================= //
-// -------------------------- Public API Definitions------------------------ //
-// ========================================================================= //
-
-TestCase::TestCase(std::string re, int rule)
-    : regex_str(std::move(re)),
-      match_rule(rule),
-      substituted_regex(internal::PerformSubstitutions(regex_str)),
-      regex(std::make_shared<benchmark::Regex>()) {
-  std::string err_str;
-  regex->Init(substituted_regex, &err_str);
-  CHECK(err_str.empty()) << "Could not construct regex \"" << substituted_regex
-                         << "\""
-                         << "\n    originally \"" << regex_str << "\""
-                         << "\n    got error: " << err_str;
-}
-
-int AddCases(TestCaseID ID, std::initializer_list<TestCase> il) {
-  auto& L = internal::GetTestCaseList(ID);
-  L.insert(L.end(), il);
-  return 0;
-}
-
-int SetSubstitutions(
-    std::initializer_list<std::pair<std::string, std::string>> il) {
-  auto& subs = internal::GetSubstitutions();
-  for (auto KV : il) {
-    bool exists = false;
-    KV.second = internal::PerformSubstitutions(KV.second);
-    for (auto& EKV : subs) {
-      if (EKV.first == KV.first) {
-        EKV.second = std::move(KV.second);
-        exists = true;
-        break;
-      }
-    }
-    if (!exists) subs.push_back(std::move(KV));
-  }
-  return 0;
-}
-
-void RunOutputTests(int argc, char* argv[]) {
-  using internal::GetTestCaseList;
-  benchmark::Initialize(&argc, argv);
-  auto options = benchmark::internal::GetOutputOptions(/*force_no_color*/ true);
-  benchmark::ConsoleReporter CR(options);
-  benchmark::JSONReporter JR;
-  benchmark::CSVReporter CSVR;
-  struct ReporterTest {
-    const char* name;
-    std::vector<TestCase>& output_cases;
-    std::vector<TestCase>& error_cases;
-    benchmark::BenchmarkReporter& reporter;
-    std::stringstream out_stream;
-    std::stringstream err_stream;
-
-    ReporterTest(const char* n, std::vector<TestCase>& out_tc,
-                 std::vector<TestCase>& err_tc,
-                 benchmark::BenchmarkReporter& br)
-        : name(n), output_cases(out_tc), error_cases(err_tc), reporter(br) {
-      reporter.SetOutputStream(&out_stream);
-      reporter.SetErrorStream(&err_stream);
-    }
-  } TestCases[] = {
-      {"ConsoleReporter", GetTestCaseList(TC_ConsoleOut),
-       GetTestCaseList(TC_ConsoleErr), CR},
-      {"JSONReporter", GetTestCaseList(TC_JSONOut), GetTestCaseList(TC_JSONErr),
-       JR},
-      {"CSVReporter", GetTestCaseList(TC_CSVOut), GetTestCaseList(TC_CSVErr),
-       CSVR},
-  };
-
-  // Create the test reporter and run the benchmarks.
-  std::cout << "Running benchmarks...\n";
-  internal::TestReporter test_rep({&CR, &JR, &CSVR});
-  benchmark::RunSpecifiedBenchmarks(&test_rep);
-
-  for (auto& rep_test : TestCases) {
-    std::string msg = std::string("\nTesting ") + rep_test.name + " Output\n";
-    std::string banner(msg.size() - 1, '-');
-    std::cout << banner << msg << banner << "\n";
-
-    std::cerr << rep_test.err_stream.str();
-    std::cout << rep_test.out_stream.str();
-
-    internal::CheckCases(rep_test.error_cases, rep_test.err_stream);
-    internal::CheckCases(rep_test.output_cases, rep_test.out_stream);
-
-    std::cout << "\n";
-  }
-
-  // now that we know the output is as expected, we can dispatch
-  // the checks to subscribees.
-  auto& csv = TestCases[2];
-  // would use == but gcc spits a warning
-  CHECK(std::strcmp(csv.name, "CSVReporter") == 0);
-  internal::GetResultsChecker().CheckResults(csv.out_stream);
-}
-
-int SubstrCnt(const std::string& haystack, const std::string& pat) {
-  if (pat.length() == 0) return 0;
-  int count = 0;
-  for (size_t offset = haystack.find(pat); offset != std::string::npos;
-       offset = haystack.find(pat, offset + pat.length()))
-    ++count;
-  return count;
-}
-
-static char ToHex(int ch) {
-  return ch < 10 ? static_cast<char>('0' + ch)
-                 : static_cast<char>('a' + (ch - 10));
-}
-
-static char RandomHexChar() {
-  static std::mt19937 rd{std::random_device{}()};
-  static std::uniform_int_distribution<int> mrand{0, 15};
-  return ToHex(mrand(rd));
-}
-
-static std::string GetRandomFileName() {
-  std::string model = "test.%%%%%%";
-  for (auto & ch :  model) {
-    if (ch == '%')
-      ch = RandomHexChar();
-  }
-  return model;
-}
-
-static bool FileExists(std::string const& name) {
-  std::ifstream in(name.c_str());
-  return in.good();
-}
-
-static std::string GetTempFileName() {
-  // This function attempts to avoid race conditions where two tests
-  // create the same file at the same time. However, it still introduces races
-  // similar to tmpnam.
-  int retries = 3;
-  while (--retries) {
-    std::string name = GetRandomFileName();
-    if (!FileExists(name))
-      return name;
-  }
-  std::cerr << "Failed to create unique temporary file name" << std::endl;
-  std::abort();
-}
-
-std::string GetFileReporterOutput(int argc, char* argv[]) {
-  std::vector<char*> new_argv(argv, argv + argc);
-  assert(static_cast<decltype(new_argv)::size_type>(argc) == new_argv.size());
-
-  std::string tmp_file_name = GetTempFileName();
-  std::cout << "Will be using this as the tmp file: " << tmp_file_name << '\n';
-
-  std::string tmp = "--benchmark_out=";
-  tmp += tmp_file_name;
-  new_argv.emplace_back(const_cast<char*>(tmp.c_str()));
-
-  argc = int(new_argv.size());
-
-  benchmark::Initialize(&argc, new_argv.data());
-  benchmark::RunSpecifiedBenchmarks();
-
-  // Read the output back from the file, and delete the file.
-  std::ifstream tmp_stream(tmp_file_name);
-  std::string output = std::string((std::istreambuf_iterator<char>(tmp_stream)),
-                                   std::istreambuf_iterator<char>());
-  std::remove(tmp_file_name.c_str());
-
-  return output;
-}
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/test/perf_counters_gtest.cc b/gnu/llvm/libcxx/utils/google-benchmark/test/perf_counters_gtest.cc
deleted file mode 100644
index 2a2868a7153..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/test/perf_counters_gtest.cc
+++ /dev/null
@@ -1,145 +0,0 @@
-#include <thread>
-
-#include "../src/perf_counters.h"
-#include "gtest/gtest.h"
-
-#ifndef GTEST_SKIP
-struct MsgHandler {
-  void operator=(std::ostream&){}
-};
-#define GTEST_SKIP() return MsgHandler() = std::cout
-#endif
-
-using benchmark::internal::PerfCounters;
-using benchmark::internal::PerfCounterValues;
-
-namespace {
-const char kGenericPerfEvent1[] = "CYCLES";
-const char kGenericPerfEvent2[] = "BRANCHES";
-const char kGenericPerfEvent3[] = "INSTRUCTIONS";
-
-TEST(PerfCountersTest, Init) {
-  EXPECT_EQ(PerfCounters::Initialize(), PerfCounters::kSupported);
-}
-
-TEST(PerfCountersTest, OneCounter) {
-  if (!PerfCounters::kSupported) {
-    GTEST_SKIP() << "Performance counters not supported.\n";
-  }
-  EXPECT_TRUE(PerfCounters::Initialize());
-  EXPECT_TRUE(PerfCounters::Create({kGenericPerfEvent1}).IsValid());
-}
-
-TEST(PerfCountersTest, NegativeTest) {
-  if (!PerfCounters::kSupported) {
-    EXPECT_FALSE(PerfCounters::Initialize());
-    return;
-  }
-  EXPECT_TRUE(PerfCounters::Initialize());
-  EXPECT_FALSE(PerfCounters::Create({}).IsValid());
-  EXPECT_FALSE(PerfCounters::Create({""}).IsValid());
-  EXPECT_FALSE(PerfCounters::Create({"not a counter name"}).IsValid());
-  {
-    EXPECT_TRUE(PerfCounters::Create({kGenericPerfEvent1, kGenericPerfEvent2,
-                                      kGenericPerfEvent3})
-                    .IsValid());
-  }
-  EXPECT_FALSE(
-      PerfCounters::Create({kGenericPerfEvent2, "", kGenericPerfEvent1})
-          .IsValid());
-  EXPECT_FALSE(PerfCounters::Create({kGenericPerfEvent3, "not a counter name",
-                                     kGenericPerfEvent1})
-                   .IsValid());
-  {
-    EXPECT_TRUE(PerfCounters::Create({kGenericPerfEvent1, kGenericPerfEvent2,
-                                      kGenericPerfEvent3})
-                    .IsValid());
-  }
-  EXPECT_FALSE(
-      PerfCounters::Create({kGenericPerfEvent1, kGenericPerfEvent2,
-                            kGenericPerfEvent3, "MISPREDICTED_BRANCH_RETIRED"})
-          .IsValid());
-}
-
-TEST(PerfCountersTest, Read1Counter) {
-  if (!PerfCounters::kSupported) {
-    GTEST_SKIP() << "Test skipped because libpfm is not supported.\n";
-  }
-  EXPECT_TRUE(PerfCounters::Initialize());
-  auto counters = PerfCounters::Create({kGenericPerfEvent1});
-  EXPECT_TRUE(counters.IsValid());
-  PerfCounterValues values1(1);
-  EXPECT_TRUE(counters.Snapshot(&values1));
-  EXPECT_GT(values1[0], 0);
-  PerfCounterValues values2(1);
-  EXPECT_TRUE(counters.Snapshot(&values2));
-  EXPECT_GT(values2[0], 0);
-  EXPECT_GT(values2[0], values1[0]);
-}
-
-TEST(PerfCountersTest, Read2Counters) {
-  if (!PerfCounters::kSupported) {
-    GTEST_SKIP() << "Test skipped because libpfm is not supported.\n";
-  }
-  EXPECT_TRUE(PerfCounters::Initialize());
-  auto counters =
-      PerfCounters::Create({kGenericPerfEvent1, kGenericPerfEvent2});
-  EXPECT_TRUE(counters.IsValid());
-  PerfCounterValues values1(2);
-  EXPECT_TRUE(counters.Snapshot(&values1));
-  EXPECT_GT(values1[0], 0);
-  EXPECT_GT(values1[1], 0);
-  PerfCounterValues values2(2);
-  EXPECT_TRUE(counters.Snapshot(&values2));
-  EXPECT_GT(values2[0], 0);
-  EXPECT_GT(values2[1], 0);
-}
-
-size_t do_work() {
-  size_t res = 0;
-  for (size_t i = 0; i < 100000000; ++i) res += i * i;
-  return res;
-}
-
-void measure(size_t threadcount, PerfCounterValues* values1,
-             PerfCounterValues* values2) {
-  CHECK_NE(values1, nullptr);
-  CHECK_NE(values2, nullptr);
-  std::vector<std::thread> threads(threadcount);
-  auto work = [&]() { CHECK(do_work() > 1000); };
-
-  // We need to first set up the counters, then start the threads, so the
-  // threads would inherit the counters. But later, we need to first destroy the
-  // thread pool (so all the work finishes), then measure the counters. So the
-  // scopes overlap, and we need to explicitly control the scope of the
-  // threadpool.
-  auto counters =
-      PerfCounters::Create({kGenericPerfEvent1, kGenericPerfEvent3});
-  for (auto& t : threads) t = std::thread(work);
-  counters.Snapshot(values1);
-  for (auto& t : threads) t.join();
-  counters.Snapshot(values2);
-}
-
-TEST(PerfCountersTest, MultiThreaded) {
-  if (!PerfCounters::kSupported) {
-    GTEST_SKIP() << "Test skipped because libpfm is not supported.";
-  }
-  EXPECT_TRUE(PerfCounters::Initialize());
-  PerfCounterValues values1(2);
-  PerfCounterValues values2(2);
-
-  measure(2, &values1, &values2);
-  std::vector<double> D1{static_cast<double>(values2[0] - values1[0]),
-                         static_cast<double>(values2[1] - values1[1])};
-
-  measure(4, &values1, &values2);
-  std::vector<double> D2{static_cast<double>(values2[0] - values1[0]),
-                         static_cast<double>(values2[1] - values1[1])};
-
-  // Some extra work will happen on the main thread - like joining the threads
-  // - so the ratio won't be quite 2.0, but very close.
-  EXPECT_GE(D2[0], 1.9 * D1[0]);
-  EXPECT_GE(D2[1], 1.9 * D1[1]);
-}
-}  // namespace
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/test/perf_counters_test.cc b/gnu/llvm/libcxx/utils/google-benchmark/test/perf_counters_test.cc
deleted file mode 100644
index d6e0284d4d4..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/test/perf_counters_test.cc
+++ /dev/null
@@ -1,27 +0,0 @@
-#undef NDEBUG
-
-#include "../src/perf_counters.h"
-
-#include "benchmark/benchmark.h"
-#include "output_test.h"
-
-void BM_Simple(benchmark::State& state) {
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(state.iterations());
-  }
-}
-BENCHMARK(BM_Simple);
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_Simple\",$"}});
-
-void CheckSimple(Results const& e) {
-  CHECK_COUNTER_VALUE(e, double, "CYCLES", GT, 0);
-  CHECK_COUNTER_VALUE(e, double, "BRANCHES", GT, 0.0);
-}
-CHECK_BENCHMARK_RESULTS("BM_Simple", &CheckSimple);
-
-int main(int argc, char* argv[]) {
-  if (!benchmark::internal::PerfCounters::kSupported) {
-    return 0;
-  }
-  RunOutputTests(argc, argv);
-}
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/test/register_benchmark_test.cc b/gnu/llvm/libcxx/utils/google-benchmark/test/register_benchmark_test.cc
deleted file mode 100644
index 3ac5b21fb34..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/test/register_benchmark_test.cc
+++ /dev/null
@@ -1,184 +0,0 @@
-
-#undef NDEBUG
-#include <cassert>
-#include <vector>
-
-#include "../src/check.h"  // NOTE: check.h is for internal use only!
-#include "benchmark/benchmark.h"
-
-namespace {
-
-class TestReporter : public benchmark::ConsoleReporter {
- public:
-  virtual void ReportRuns(const std::vector<Run>& report) {
-    all_runs_.insert(all_runs_.end(), begin(report), end(report));
-    ConsoleReporter::ReportRuns(report);
-  }
-
-  std::vector<Run> all_runs_;
-};
-
-struct TestCase {
-  std::string name;
-  const char* label;
-  // Note: not explicit as we rely on it being converted through ADD_CASES.
-  TestCase(const char* xname) : TestCase(xname, nullptr) {}
-  TestCase(const char* xname, const char* xlabel)
-      : name(xname), label(xlabel) {}
-
-  typedef benchmark::BenchmarkReporter::Run Run;
-
-  void CheckRun(Run const& run) const {
-    // clang-format off
-    CHECK(name == run.benchmark_name()) << "expected " << name << " got "
-                                      << run.benchmark_name();
-    if (label) {
-      CHECK(run.report_label == label) << "expected " << label << " got "
-                                       << run.report_label;
-    } else {
-      CHECK(run.report_label == "");
-    }
-    // clang-format on
-  }
-};
-
-std::vector<TestCase> ExpectedResults;
-
-int AddCases(std::initializer_list<TestCase> const& v) {
-  for (auto N : v) {
-    ExpectedResults.push_back(N);
-  }
-  return 0;
-}
-
-#define CONCAT(x, y) CONCAT2(x, y)
-#define CONCAT2(x, y) x##y
-#define ADD_CASES(...) int CONCAT(dummy, __LINE__) = AddCases({__VA_ARGS__})
-
-}  // end namespace
-
-typedef benchmark::internal::Benchmark* ReturnVal;
-
-//----------------------------------------------------------------------------//
-// Test RegisterBenchmark with no additional arguments
-//----------------------------------------------------------------------------//
-void BM_function(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_function);
-ReturnVal dummy = benchmark::RegisterBenchmark(
-    "BM_function_manual_registration", BM_function);
-ADD_CASES({"BM_function"}, {"BM_function_manual_registration"});
-
-//----------------------------------------------------------------------------//
-// Test RegisterBenchmark with additional arguments
-// Note: GCC <= 4.8 do not support this form of RegisterBenchmark because they
-//       reject the variadic pack expansion of lambda captures.
-//----------------------------------------------------------------------------//
-#ifndef BENCHMARK_HAS_NO_VARIADIC_REGISTER_BENCHMARK
-
-void BM_extra_args(benchmark::State& st, const char* label) {
-  for (auto _ : st) {
-  }
-  st.SetLabel(label);
-}
-int RegisterFromFunction() {
-  std::pair<const char*, const char*> cases[] = {
-      {"test1", "One"}, {"test2", "Two"}, {"test3", "Three"}};
-  for (auto const& c : cases)
-    benchmark::RegisterBenchmark(c.first, &BM_extra_args, c.second);
-  return 0;
-}
-int dummy2 = RegisterFromFunction();
-ADD_CASES({"test1", "One"}, {"test2", "Two"}, {"test3", "Three"});
-
-#endif  // BENCHMARK_HAS_NO_VARIADIC_REGISTER_BENCHMARK
-
-//----------------------------------------------------------------------------//
-// Test RegisterBenchmark with different callable types
-//----------------------------------------------------------------------------//
-
-struct CustomFixture {
-  void operator()(benchmark::State& st) {
-    for (auto _ : st) {
-    }
-  }
-};
-
-void TestRegistrationAtRuntime() {
-#ifdef BENCHMARK_HAS_CXX11
-  {
-    CustomFixture fx;
-    benchmark::RegisterBenchmark("custom_fixture", fx);
-    AddCases({"custom_fixture"});
-  }
-#endif
-#ifndef BENCHMARK_HAS_NO_VARIADIC_REGISTER_BENCHMARK
-  {
-    const char* x = "42";
-    auto capturing_lam = [=](benchmark::State& st) {
-      for (auto _ : st) {
-      }
-      st.SetLabel(x);
-    };
-    benchmark::RegisterBenchmark("lambda_benchmark", capturing_lam);
-    AddCases({{"lambda_benchmark", x}});
-  }
-#endif
-}
-
-// Test that all benchmarks, registered at either during static init or runtime,
-// are run and the results are passed to the reported.
-void RunTestOne() {
-  TestRegistrationAtRuntime();
-
-  TestReporter test_reporter;
-  benchmark::RunSpecifiedBenchmarks(&test_reporter);
-
-  typedef benchmark::BenchmarkReporter::Run Run;
-  auto EB = ExpectedResults.begin();
-
-  for (Run const& run : test_reporter.all_runs_) {
-    assert(EB != ExpectedResults.end());
-    EB->CheckRun(run);
-    ++EB;
-  }
-  assert(EB == ExpectedResults.end());
-}
-
-// Test that ClearRegisteredBenchmarks() clears all previously registered
-// benchmarks.
-// Also test that new benchmarks can be registered and ran afterwards.
-void RunTestTwo() {
-  assert(ExpectedResults.size() != 0 &&
-         "must have at least one registered benchmark");
-  ExpectedResults.clear();
-  benchmark::ClearRegisteredBenchmarks();
-
-  TestReporter test_reporter;
-  size_t num_ran = benchmark::RunSpecifiedBenchmarks(&test_reporter);
-  assert(num_ran == 0);
-  assert(test_reporter.all_runs_.begin() == test_reporter.all_runs_.end());
-
-  TestRegistrationAtRuntime();
-  num_ran = benchmark::RunSpecifiedBenchmarks(&test_reporter);
-  assert(num_ran == ExpectedResults.size());
-
-  typedef benchmark::BenchmarkReporter::Run Run;
-  auto EB = ExpectedResults.begin();
-
-  for (Run const& run : test_reporter.all_runs_) {
-    assert(EB != ExpectedResults.end());
-    EB->CheckRun(run);
-    ++EB;
-  }
-  assert(EB == ExpectedResults.end());
-}
-
-int main(int argc, char* argv[]) {
-  benchmark::Initialize(&argc, argv);
-
-  RunTestOne();
-  RunTestTwo();
-}
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/test/repetitions_test.cc b/gnu/llvm/libcxx/utils/google-benchmark/test/repetitions_test.cc
deleted file mode 100644
index f93de502a35..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/test/repetitions_test.cc
+++ /dev/null
@@ -1,208 +0,0 @@
-
-#include "benchmark/benchmark.h"
-#include "output_test.h"
-
-// ========================================================================= //
-// ------------------------ Testing Basic Output --------------------------- //
-// ========================================================================= //
-
-void BM_ExplicitRepetitions(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_ExplicitRepetitions)->Repetitions(2);
-
-ADD_CASES(TC_ConsoleOut,
-          {{"^BM_ExplicitRepetitions/repeats:2 %console_report$"}});
-ADD_CASES(TC_ConsoleOut,
-          {{"^BM_ExplicitRepetitions/repeats:2 %console_report$"}});
-ADD_CASES(TC_ConsoleOut,
-          {{"^BM_ExplicitRepetitions/repeats:2_mean %console_report$"}});
-ADD_CASES(TC_ConsoleOut,
-          {{"^BM_ExplicitRepetitions/repeats:2_median %console_report$"}});
-ADD_CASES(TC_ConsoleOut,
-          {{"^BM_ExplicitRepetitions/repeats:2_stddev %console_report$"}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_ExplicitRepetitions/repeats:2\",$"},
-           {"\"family_index\": 0,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_ExplicitRepetitions/repeats:2\",$", MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"repetitions\": 2,$", MR_Next},
-           {"\"repetition_index\": 0,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\"$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_ExplicitRepetitions/repeats:2\",$"},
-           {"\"family_index\": 0,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_ExplicitRepetitions/repeats:2\",$", MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"repetitions\": 2,$", MR_Next},
-           {"\"repetition_index\": 1,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\"$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_ExplicitRepetitions/repeats:2_mean\",$"},
-           {"\"family_index\": 0,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_ExplicitRepetitions/repeats:2\",$", MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"repetitions\": 2,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next},
-           {"\"aggregate_name\": \"mean\",$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\"$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_ExplicitRepetitions/repeats:2_median\",$"},
-           {"\"family_index\": 0,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_ExplicitRepetitions/repeats:2\",$", MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"repetitions\": 2,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next},
-           {"\"aggregate_name\": \"median\",$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\"$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_ExplicitRepetitions/repeats:2_stddev\",$"},
-           {"\"family_index\": 0,$", MR_Next},
-           {"\"per_family_instance_index\": 0,$", MR_Next},
-           {"\"run_name\": \"BM_ExplicitRepetitions/repeats:2\",$", MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"repetitions\": 2,$", MR_Next},
-           {"\"threads\": 1,$", MR_Next},
-           {"\"aggregate_name\": \"stddev\",$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\"$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_ExplicitRepetitions/repeats:2\",%csv_report$"}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_ExplicitRepetitions/repeats:2\",%csv_report$"}});
-ADD_CASES(TC_CSVOut,
-          {{"^\"BM_ExplicitRepetitions/repeats:2_mean\",%csv_report$"}});
-ADD_CASES(TC_CSVOut,
-          {{"^\"BM_ExplicitRepetitions/repeats:2_median\",%csv_report$"}});
-ADD_CASES(TC_CSVOut,
-          {{"^\"BM_ExplicitRepetitions/repeats:2_stddev\",%csv_report$"}});
-
-// ========================================================================= //
-// ------------------------ Testing Basic Output --------------------------- //
-// ========================================================================= //
-
-void BM_ImplicitRepetitions(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_ImplicitRepetitions);
-
-ADD_CASES(TC_ConsoleOut, {{"^BM_ImplicitRepetitions %console_report$"}});
-ADD_CASES(TC_ConsoleOut, {{"^BM_ImplicitRepetitions %console_report$"}});
-ADD_CASES(TC_ConsoleOut, {{"^BM_ImplicitRepetitions %console_report$"}});
-ADD_CASES(TC_ConsoleOut, {{"^BM_ImplicitRepetitions_mean %console_report$"}});
-ADD_CASES(TC_ConsoleOut, {{"^BM_ImplicitRepetitions_median %console_report$"}});
-ADD_CASES(TC_ConsoleOut, {{"^BM_ImplicitRepetitions_stddev %console_report$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_ImplicitRepetitions\",$"},
-                       {"\"family_index\": 1,$", MR_Next},
-                       {"\"per_family_instance_index\": 0,$", MR_Next},
-                       {"\"run_name\": \"BM_ImplicitRepetitions\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"repetitions\": 3,$", MR_Next},
-                       {"\"repetition_index\": 0,$", MR_Next},
-                       {"\"threads\": 1,$", MR_Next},
-                       {"\"iterations\": %int,$", MR_Next},
-                       {"\"real_time\": %float,$", MR_Next},
-                       {"\"cpu_time\": %float,$", MR_Next},
-                       {"\"time_unit\": \"ns\"$", MR_Next},
-                       {"}", MR_Next}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_ImplicitRepetitions\",$"},
-                       {"\"family_index\": 1,$", MR_Next},
-                       {"\"per_family_instance_index\": 0,$", MR_Next},
-                       {"\"run_name\": \"BM_ImplicitRepetitions\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"repetitions\": 3,$", MR_Next},
-                       {"\"repetition_index\": 1,$", MR_Next},
-                       {"\"threads\": 1,$", MR_Next},
-                       {"\"iterations\": %int,$", MR_Next},
-                       {"\"real_time\": %float,$", MR_Next},
-                       {"\"cpu_time\": %float,$", MR_Next},
-                       {"\"time_unit\": \"ns\"$", MR_Next},
-                       {"}", MR_Next}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_ImplicitRepetitions\",$"},
-                       {"\"family_index\": 1,$", MR_Next},
-                       {"\"per_family_instance_index\": 0,$", MR_Next},
-                       {"\"run_name\": \"BM_ImplicitRepetitions\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"repetitions\": 3,$", MR_Next},
-                       {"\"repetition_index\": 2,$", MR_Next},
-                       {"\"threads\": 1,$", MR_Next},
-                       {"\"iterations\": %int,$", MR_Next},
-                       {"\"real_time\": %float,$", MR_Next},
-                       {"\"cpu_time\": %float,$", MR_Next},
-                       {"\"time_unit\": \"ns\"$", MR_Next},
-                       {"}", MR_Next}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_ImplicitRepetitions_mean\",$"},
-                       {"\"family_index\": 1,$", MR_Next},
-                       {"\"per_family_instance_index\": 0,$", MR_Next},
-                       {"\"run_name\": \"BM_ImplicitRepetitions\",$", MR_Next},
-                       {"\"run_type\": \"aggregate\",$", MR_Next},
-                       {"\"repetitions\": 3,$", MR_Next},
-                       {"\"threads\": 1,$", MR_Next},
-                       {"\"aggregate_name\": \"mean\",$", MR_Next},
-                       {"\"iterations\": %int,$", MR_Next},
-                       {"\"real_time\": %float,$", MR_Next},
-                       {"\"cpu_time\": %float,$", MR_Next},
-                       {"\"time_unit\": \"ns\"$", MR_Next},
-                       {"}", MR_Next}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_ImplicitRepetitions_median\",$"},
-                       {"\"family_index\": 1,$", MR_Next},
-                       {"\"per_family_instance_index\": 0,$", MR_Next},
-                       {"\"run_name\": \"BM_ImplicitRepetitions\",$", MR_Next},
-                       {"\"run_type\": \"aggregate\",$", MR_Next},
-                       {"\"repetitions\": 3,$", MR_Next},
-                       {"\"threads\": 1,$", MR_Next},
-                       {"\"aggregate_name\": \"median\",$", MR_Next},
-                       {"\"iterations\": %int,$", MR_Next},
-                       {"\"real_time\": %float,$", MR_Next},
-                       {"\"cpu_time\": %float,$", MR_Next},
-                       {"\"time_unit\": \"ns\"$", MR_Next},
-                       {"}", MR_Next}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_ImplicitRepetitions_stddev\",$"},
-                       {"\"family_index\": 1,$", MR_Next},
-                       {"\"per_family_instance_index\": 0,$", MR_Next},
-                       {"\"run_name\": \"BM_ImplicitRepetitions\",$", MR_Next},
-                       {"\"run_type\": \"aggregate\",$", MR_Next},
-                       {"\"repetitions\": 3,$", MR_Next},
-                       {"\"threads\": 1,$", MR_Next},
-                       {"\"aggregate_name\": \"stddev\",$", MR_Next},
-                       {"\"iterations\": %int,$", MR_Next},
-                       {"\"real_time\": %float,$", MR_Next},
-                       {"\"cpu_time\": %float,$", MR_Next},
-                       {"\"time_unit\": \"ns\"$", MR_Next},
-                       {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_ImplicitRepetitions\",%csv_report$"}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_ImplicitRepetitions\",%csv_report$"}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_ImplicitRepetitions_mean\",%csv_report$"}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_ImplicitRepetitions_median\",%csv_report$"}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_ImplicitRepetitions_stddev\",%csv_report$"}});
-
-// ========================================================================= //
-// --------------------------- TEST CASES END ------------------------------ //
-// ========================================================================= //
-
-int main(int argc, char* argv[]) { RunOutputTests(argc, argv); }
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/test/report_aggregates_only_test.cc b/gnu/llvm/libcxx/utils/google-benchmark/test/report_aggregates_only_test.cc
deleted file mode 100644
index 9646b9be534..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/test/report_aggregates_only_test.cc
+++ /dev/null
@@ -1,39 +0,0 @@
-
-#undef NDEBUG
-#include <cstdio>
-#include <string>
-
-#include "benchmark/benchmark.h"
-#include "output_test.h"
-
-// Ok this test is super ugly. We want to check what happens with the file
-// reporter in the presence of ReportAggregatesOnly().
-// We do not care about console output, the normal tests check that already.
-
-void BM_SummaryRepeat(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_SummaryRepeat)->Repetitions(3)->ReportAggregatesOnly();
-
-int main(int argc, char* argv[]) {
-  const std::string output = GetFileReporterOutput(argc, argv);
-
-  if (SubstrCnt(output, "\"name\": \"BM_SummaryRepeat/repeats:3") != 3 ||
-      SubstrCnt(output, "\"name\": \"BM_SummaryRepeat/repeats:3_mean\"") != 1 ||
-      SubstrCnt(output, "\"name\": \"BM_SummaryRepeat/repeats:3_median\"") !=
-          1 ||
-      SubstrCnt(output, "\"name\": \"BM_SummaryRepeat/repeats:3_stddev\"") !=
-          1) {
-    std::cout << "Precondition mismatch. Expected to only find three "
-                 "occurrences of \"BM_SummaryRepeat/repeats:3\" substring:\n"
-                 "\"name\": \"BM_SummaryRepeat/repeats:3_mean\", "
-                 "\"name\": \"BM_SummaryRepeat/repeats:3_median\", "
-                 "\"name\": \"BM_SummaryRepeat/repeats:3_stddev\"\nThe entire "
-                 "output:\n";
-    std::cout << output;
-    return 1;
-  }
-
-  return 0;
-}
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/test/reporter_output_test.cc b/gnu/llvm/libcxx/utils/google-benchmark/test/reporter_output_test.cc
deleted file mode 100644
index ec6d51b3591..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/test/reporter_output_test.cc
+++ /dev/null
@@ -1,604 +0,0 @@
-
-#undef NDEBUG
-#include <utility>
-
-#include "benchmark/benchmark.h"
-#include "output_test.h"
-
-// ========================================================================= //
-// ---------------------- Testing Prologue Output -------------------------- //
-// ========================================================================= //
-
-ADD_CASES(TC_ConsoleOut, {{"^[-]+$", MR_Next},
-                          {"^Benchmark %s Time %s CPU %s Iterations$", MR_Next},
-                          {"^[-]+$", MR_Next}});
-static int AddContextCases() {
-  AddCases(TC_ConsoleErr,
-           {
-               {"%int[-/]%int[-/]%int %int:%int:%int$", MR_Default},
-               {"Running .*/reporter_output_test(\\.exe)?$", MR_Next},
-               {"Run on \\(%int X %float MHz CPU s?\\)", MR_Next},
-           });
-  AddCases(TC_JSONOut,
-           {{"^\\{", MR_Default},
-            {"\"context\":", MR_Next},
-            {"\"date\": \"", MR_Next},
-            {"\"host_name\":", MR_Next},
-            {"\"executable\": \".*(/|\\\\)reporter_output_test(\\.exe)?\",",
-             MR_Next},
-            {"\"num_cpus\": %int,$", MR_Next},
-            {"\"mhz_per_cpu\": %float,$", MR_Next},
-            {"\"cpu_scaling_enabled\": ", MR_Next},
-            {"\"caches\": \\[$", MR_Next}});
-  auto const& Info = benchmark::CPUInfo::Get();
-  auto const& Caches = Info.caches;
-  if (!Caches.empty()) {
-    AddCases(TC_ConsoleErr, {{"CPU Caches:$", MR_Next}});
-  }
-  for (size_t I = 0; I < Caches.size(); ++I) {
-    std::string num_caches_str =
-        Caches[I].num_sharing != 0 ? " \\(x%int\\)$" : "$";
-    AddCases(
-        TC_ConsoleErr,
-        {{"L%int (Data|Instruction|Unified) %intK" + num_caches_str, MR_Next}});
-    AddCases(TC_JSONOut, {{"\\{$", MR_Next},
-                          {"\"type\": \"", MR_Next},
-                          {"\"level\": %int,$", MR_Next},
-                          {"\"size\": %int,$", MR_Next},
-                          {"\"num_sharing\": %int$", MR_Next},
-                          {"}[,]{0,1}$", MR_Next}});
-  }
-  AddCases(TC_JSONOut, {{"],$"}});
-  auto const& LoadAvg = Info.load_avg;
-  if (!LoadAvg.empty()) {
-    AddCases(TC_ConsoleErr,
-             {{"Load Average: (%float, ){0,2}%float$", MR_Next}});
-  }
-  AddCases(TC_JSONOut, {{"\"load_avg\": \\[(%float,?){0,3}],$", MR_Next}});
-  return 0;
-}
-int dummy_register = AddContextCases();
-ADD_CASES(TC_CSVOut, {{"%csv_header"}});
-
-// ========================================================================= //
-// ------------------------ Testing Basic Output --------------------------- //
-// ========================================================================= //
-
-void BM_basic(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_basic);
-
-ADD_CASES(TC_ConsoleOut, {{"^BM_basic %console_report$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_basic\",$"},
-                       {"\"run_name\": \"BM_basic\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"iterations\": %int,$", MR_Next},
-                       {"\"real_time\": %float,$", MR_Next},
-                       {"\"cpu_time\": %float,$", MR_Next},
-                       {"\"time_unit\": \"ns\"$", MR_Next},
-                       {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_basic\",%csv_report$"}});
-
-// ========================================================================= //
-// ------------------------ Testing Bytes per Second Output ---------------- //
-// ========================================================================= //
-
-void BM_bytes_per_second(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  state.SetBytesProcessed(1);
-}
-BENCHMARK(BM_bytes_per_second);
-
-ADD_CASES(TC_ConsoleOut, {{"^BM_bytes_per_second %console_report "
-                           "bytes_per_second=%float[kM]{0,1}/s$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_bytes_per_second\",$"},
-                       {"\"run_name\": \"BM_bytes_per_second\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"iterations\": %int,$", MR_Next},
-                       {"\"real_time\": %float,$", MR_Next},
-                       {"\"cpu_time\": %float,$", MR_Next},
-                       {"\"time_unit\": \"ns\",$", MR_Next},
-                       {"\"bytes_per_second\": %float$", MR_Next},
-                       {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_bytes_per_second\",%csv_bytes_report$"}});
-
-// ========================================================================= //
-// ------------------------ Testing Items per Second Output ---------------- //
-// ========================================================================= //
-
-void BM_items_per_second(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  state.SetItemsProcessed(1);
-}
-BENCHMARK(BM_items_per_second);
-
-ADD_CASES(TC_ConsoleOut, {{"^BM_items_per_second %console_report "
-                           "items_per_second=%float[kM]{0,1}/s$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_items_per_second\",$"},
-                       {"\"run_name\": \"BM_items_per_second\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"iterations\": %int,$", MR_Next},
-                       {"\"real_time\": %float,$", MR_Next},
-                       {"\"cpu_time\": %float,$", MR_Next},
-                       {"\"time_unit\": \"ns\",$", MR_Next},
-                       {"\"items_per_second\": %float$", MR_Next},
-                       {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_items_per_second\",%csv_items_report$"}});
-
-// ========================================================================= //
-// ------------------------ Testing Label Output --------------------------- //
-// ========================================================================= //
-
-void BM_label(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  state.SetLabel("some label");
-}
-BENCHMARK(BM_label);
-
-ADD_CASES(TC_ConsoleOut, {{"^BM_label %console_report some label$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_label\",$"},
-                       {"\"run_name\": \"BM_label\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"iterations\": %int,$", MR_Next},
-                       {"\"real_time\": %float,$", MR_Next},
-                       {"\"cpu_time\": %float,$", MR_Next},
-                       {"\"time_unit\": \"ns\",$", MR_Next},
-                       {"\"label\": \"some label\"$", MR_Next},
-                       {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_label\",%csv_label_report_begin\"some "
-                       "label\"%csv_label_report_end$"}});
-
-// ========================================================================= //
-// ------------------------ Testing Error Output --------------------------- //
-// ========================================================================= //
-
-void BM_error(benchmark::State& state) {
-  state.SkipWithError("message");
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_error);
-ADD_CASES(TC_ConsoleOut, {{"^BM_error[ ]+ERROR OCCURRED: 'message'$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_error\",$"},
-                       {"\"run_name\": \"BM_error\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"error_occurred\": true,$", MR_Next},
-                       {"\"error_message\": \"message\",$", MR_Next}});
-
-ADD_CASES(TC_CSVOut, {{"^\"BM_error\",,,,,,,,true,\"message\"$"}});
-
-// ========================================================================= //
-// ------------------------ Testing No Arg Name Output -----------------------
-// //
-// ========================================================================= //
-
-void BM_no_arg_name(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_no_arg_name)->Arg(3);
-ADD_CASES(TC_ConsoleOut, {{"^BM_no_arg_name/3 %console_report$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_no_arg_name/3\",$"},
-                       {"\"run_name\": \"BM_no_arg_name/3\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_no_arg_name/3\",%csv_report$"}});
-
-// ========================================================================= //
-// ------------------------ Testing Arg Name Output ----------------------- //
-// ========================================================================= //
-
-void BM_arg_name(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_arg_name)->ArgName("first")->Arg(3);
-ADD_CASES(TC_ConsoleOut, {{"^BM_arg_name/first:3 %console_report$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_arg_name/first:3\",$"},
-                       {"\"run_name\": \"BM_arg_name/first:3\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_arg_name/first:3\",%csv_report$"}});
-
-// ========================================================================= //
-// ------------------------ Testing Arg Names Output ----------------------- //
-// ========================================================================= //
-
-void BM_arg_names(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_arg_names)->Args({2, 5, 4})->ArgNames({"first", "", "third"});
-ADD_CASES(TC_ConsoleOut,
-          {{"^BM_arg_names/first:2/5/third:4 %console_report$"}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_arg_names/first:2/5/third:4\",$"},
-           {"\"run_name\": \"BM_arg_names/first:2/5/third:4\",$", MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_arg_names/first:2/5/third:4\",%csv_report$"}});
-
-// ========================================================================= //
-// ------------------------ Testing Big Args Output ------------------------ //
-// ========================================================================= //
-
-void BM_BigArgs(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_BigArgs)->RangeMultiplier(2)->Range(1U << 30U, 1U << 31U);
-ADD_CASES(TC_ConsoleOut, {{"^BM_BigArgs/1073741824 %console_report$"},
-                          {"^BM_BigArgs/2147483648 %console_report$"}});
-
-// ========================================================================= //
-// ----------------------- Testing Complexity Output ----------------------- //
-// ========================================================================= //
-
-void BM_Complexity_O1(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  state.SetComplexityN(state.range(0));
-}
-BENCHMARK(BM_Complexity_O1)->Range(1, 1 << 18)->Complexity(benchmark::o1);
-SET_SUBSTITUTIONS({{"%bigOStr", "[ ]* %float \\([0-9]+\\)"},
-                   {"%RMS", "[ ]*[0-9]+ %"}});
-ADD_CASES(TC_ConsoleOut, {{"^BM_Complexity_O1_BigO %bigOStr %bigOStr[ ]*$"},
-                          {"^BM_Complexity_O1_RMS %RMS %RMS[ ]*$"}});
-
-// ========================================================================= //
-// ----------------------- Testing Aggregate Output ------------------------ //
-// ========================================================================= //
-
-// Test that non-aggregate data is printed by default
-void BM_Repeat(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-// need two repetitions min to be able to output any aggregate output
-BENCHMARK(BM_Repeat)->Repetitions(2);
-ADD_CASES(TC_ConsoleOut,
-          {{"^BM_Repeat/repeats:2 %console_report$"},
-           {"^BM_Repeat/repeats:2 %console_report$"},
-           {"^BM_Repeat/repeats:2_mean %console_time_only_report [ ]*2$"},
-           {"^BM_Repeat/repeats:2_median %console_time_only_report [ ]*2$"},
-           {"^BM_Repeat/repeats:2_stddev %console_time_only_report [ ]*2$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_Repeat/repeats:2\",$"},
-                       {"\"run_name\": \"BM_Repeat/repeats:2\"", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"name\": \"BM_Repeat/repeats:2\",$"},
-                       {"\"run_name\": \"BM_Repeat/repeats:2\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"name\": \"BM_Repeat/repeats:2_mean\",$"},
-                       {"\"run_name\": \"BM_Repeat/repeats:2\",$", MR_Next},
-                       {"\"run_type\": \"aggregate\",$", MR_Next},
-                       {"\"aggregate_name\": \"mean\",$", MR_Next},
-                       {"\"iterations\": 2,$", MR_Next},
-                       {"\"name\": \"BM_Repeat/repeats:2_median\",$"},
-                       {"\"run_name\": \"BM_Repeat/repeats:2\",$", MR_Next},
-                       {"\"run_type\": \"aggregate\",$", MR_Next},
-                       {"\"aggregate_name\": \"median\",$", MR_Next},
-                       {"\"iterations\": 2,$", MR_Next},
-                       {"\"name\": \"BM_Repeat/repeats:2_stddev\",$"},
-                       {"\"run_name\": \"BM_Repeat/repeats:2\",$", MR_Next},
-                       {"\"run_type\": \"aggregate\",$", MR_Next},
-                       {"\"aggregate_name\": \"stddev\",$", MR_Next},
-                       {"\"iterations\": 2,$", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_Repeat/repeats:2\",%csv_report$"},
-                      {"^\"BM_Repeat/repeats:2\",%csv_report$"},
-                      {"^\"BM_Repeat/repeats:2_mean\",%csv_report$"},
-                      {"^\"BM_Repeat/repeats:2_median\",%csv_report$"},
-                      {"^\"BM_Repeat/repeats:2_stddev\",%csv_report$"}});
-// but for two repetitions, mean and median is the same, so let's repeat..
-BENCHMARK(BM_Repeat)->Repetitions(3);
-ADD_CASES(TC_ConsoleOut,
-          {{"^BM_Repeat/repeats:3 %console_report$"},
-           {"^BM_Repeat/repeats:3 %console_report$"},
-           {"^BM_Repeat/repeats:3 %console_report$"},
-           {"^BM_Repeat/repeats:3_mean %console_time_only_report [ ]*3$"},
-           {"^BM_Repeat/repeats:3_median %console_time_only_report [ ]*3$"},
-           {"^BM_Repeat/repeats:3_stddev %console_time_only_report [ ]*3$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_Repeat/repeats:3\",$"},
-                       {"\"run_name\": \"BM_Repeat/repeats:3\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"name\": \"BM_Repeat/repeats:3\",$"},
-                       {"\"run_name\": \"BM_Repeat/repeats:3\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"name\": \"BM_Repeat/repeats:3\",$"},
-                       {"\"run_name\": \"BM_Repeat/repeats:3\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"name\": \"BM_Repeat/repeats:3_mean\",$"},
-                       {"\"run_name\": \"BM_Repeat/repeats:3\",$", MR_Next},
-                       {"\"run_type\": \"aggregate\",$", MR_Next},
-                       {"\"aggregate_name\": \"mean\",$", MR_Next},
-                       {"\"iterations\": 3,$", MR_Next},
-                       {"\"name\": \"BM_Repeat/repeats:3_median\",$"},
-                       {"\"run_name\": \"BM_Repeat/repeats:3\",$", MR_Next},
-                       {"\"run_type\": \"aggregate\",$", MR_Next},
-                       {"\"aggregate_name\": \"median\",$", MR_Next},
-                       {"\"iterations\": 3,$", MR_Next},
-                       {"\"name\": \"BM_Repeat/repeats:3_stddev\",$"},
-                       {"\"run_name\": \"BM_Repeat/repeats:3\",$", MR_Next},
-                       {"\"run_type\": \"aggregate\",$", MR_Next},
-                       {"\"aggregate_name\": \"stddev\",$", MR_Next},
-                       {"\"iterations\": 3,$", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_Repeat/repeats:3\",%csv_report$"},
-                      {"^\"BM_Repeat/repeats:3\",%csv_report$"},
-                      {"^\"BM_Repeat/repeats:3\",%csv_report$"},
-                      {"^\"BM_Repeat/repeats:3_mean\",%csv_report$"},
-                      {"^\"BM_Repeat/repeats:3_median\",%csv_report$"},
-                      {"^\"BM_Repeat/repeats:3_stddev\",%csv_report$"}});
-// median differs between even/odd number of repetitions, so just to be sure
-BENCHMARK(BM_Repeat)->Repetitions(4);
-ADD_CASES(TC_ConsoleOut,
-          {{"^BM_Repeat/repeats:4 %console_report$"},
-           {"^BM_Repeat/repeats:4 %console_report$"},
-           {"^BM_Repeat/repeats:4 %console_report$"},
-           {"^BM_Repeat/repeats:4 %console_report$"},
-           {"^BM_Repeat/repeats:4_mean %console_time_only_report [ ]*4$"},
-           {"^BM_Repeat/repeats:4_median %console_time_only_report [ ]*4$"},
-           {"^BM_Repeat/repeats:4_stddev %console_time_only_report [ ]*4$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_Repeat/repeats:4\",$"},
-                       {"\"run_name\": \"BM_Repeat/repeats:4\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"name\": \"BM_Repeat/repeats:4\",$"},
-                       {"\"run_name\": \"BM_Repeat/repeats:4\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"name\": \"BM_Repeat/repeats:4\",$"},
-                       {"\"run_name\": \"BM_Repeat/repeats:4\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"name\": \"BM_Repeat/repeats:4\",$"},
-                       {"\"run_name\": \"BM_Repeat/repeats:4\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"name\": \"BM_Repeat/repeats:4_mean\",$"},
-                       {"\"run_name\": \"BM_Repeat/repeats:4\",$", MR_Next},
-                       {"\"run_type\": \"aggregate\",$", MR_Next},
-                       {"\"aggregate_name\": \"mean\",$", MR_Next},
-                       {"\"iterations\": 4,$", MR_Next},
-                       {"\"name\": \"BM_Repeat/repeats:4_median\",$"},
-                       {"\"run_name\": \"BM_Repeat/repeats:4\",$", MR_Next},
-                       {"\"run_type\": \"aggregate\",$", MR_Next},
-                       {"\"aggregate_name\": \"median\",$", MR_Next},
-                       {"\"iterations\": 4,$", MR_Next},
-                       {"\"name\": \"BM_Repeat/repeats:4_stddev\",$"},
-                       {"\"run_name\": \"BM_Repeat/repeats:4\",$", MR_Next},
-                       {"\"run_type\": \"aggregate\",$", MR_Next},
-                       {"\"aggregate_name\": \"stddev\",$", MR_Next},
-                       {"\"iterations\": 4,$", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_Repeat/repeats:4\",%csv_report$"},
-                      {"^\"BM_Repeat/repeats:4\",%csv_report$"},
-                      {"^\"BM_Repeat/repeats:4\",%csv_report$"},
-                      {"^\"BM_Repeat/repeats:4\",%csv_report$"},
-                      {"^\"BM_Repeat/repeats:4_mean\",%csv_report$"},
-                      {"^\"BM_Repeat/repeats:4_median\",%csv_report$"},
-                      {"^\"BM_Repeat/repeats:4_stddev\",%csv_report$"}});
-
-// Test that a non-repeated test still prints non-aggregate results even when
-// only-aggregate reports have been requested
-void BM_RepeatOnce(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_RepeatOnce)->Repetitions(1)->ReportAggregatesOnly();
-ADD_CASES(TC_ConsoleOut, {{"^BM_RepeatOnce/repeats:1 %console_report$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_RepeatOnce/repeats:1\",$"},
-                       {"\"run_name\": \"BM_RepeatOnce/repeats:1\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_RepeatOnce/repeats:1\",%csv_report$"}});
-
-// Test that non-aggregate data is not reported
-void BM_SummaryRepeat(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_SummaryRepeat)->Repetitions(3)->ReportAggregatesOnly();
-ADD_CASES(
-    TC_ConsoleOut,
-    {{".*BM_SummaryRepeat/repeats:3 ", MR_Not},
-     {"^BM_SummaryRepeat/repeats:3_mean %console_time_only_report [ ]*3$"},
-     {"^BM_SummaryRepeat/repeats:3_median %console_time_only_report [ ]*3$"},
-     {"^BM_SummaryRepeat/repeats:3_stddev %console_time_only_report [ ]*3$"}});
-ADD_CASES(TC_JSONOut,
-          {{".*BM_SummaryRepeat/repeats:3 ", MR_Not},
-           {"\"name\": \"BM_SummaryRepeat/repeats:3_mean\",$"},
-           {"\"run_name\": \"BM_SummaryRepeat/repeats:3\",$", MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"aggregate_name\": \"mean\",$", MR_Next},
-           {"\"iterations\": 3,$", MR_Next},
-           {"\"name\": \"BM_SummaryRepeat/repeats:3_median\",$"},
-           {"\"run_name\": \"BM_SummaryRepeat/repeats:3\",$", MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"aggregate_name\": \"median\",$", MR_Next},
-           {"\"iterations\": 3,$", MR_Next},
-           {"\"name\": \"BM_SummaryRepeat/repeats:3_stddev\",$"},
-           {"\"run_name\": \"BM_SummaryRepeat/repeats:3\",$", MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"aggregate_name\": \"stddev\",$", MR_Next},
-           {"\"iterations\": 3,$", MR_Next}});
-ADD_CASES(TC_CSVOut, {{".*BM_SummaryRepeat/repeats:3 ", MR_Not},
-                      {"^\"BM_SummaryRepeat/repeats:3_mean\",%csv_report$"},
-                      {"^\"BM_SummaryRepeat/repeats:3_median\",%csv_report$"},
-                      {"^\"BM_SummaryRepeat/repeats:3_stddev\",%csv_report$"}});
-
-// Test that non-aggregate data is not displayed.
-// NOTE: this test is kinda bad. we are only testing the display output.
-//       But we don't check that the file output still contains everything...
-void BM_SummaryDisplay(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_SummaryDisplay)->Repetitions(2)->DisplayAggregatesOnly();
-ADD_CASES(
-    TC_ConsoleOut,
-    {{".*BM_SummaryDisplay/repeats:2 ", MR_Not},
-     {"^BM_SummaryDisplay/repeats:2_mean %console_time_only_report [ ]*2$"},
-     {"^BM_SummaryDisplay/repeats:2_median %console_time_only_report [ ]*2$"},
-     {"^BM_SummaryDisplay/repeats:2_stddev %console_time_only_report [ ]*2$"}});
-ADD_CASES(TC_JSONOut,
-          {{".*BM_SummaryDisplay/repeats:2 ", MR_Not},
-           {"\"name\": \"BM_SummaryDisplay/repeats:2_mean\",$"},
-           {"\"run_name\": \"BM_SummaryDisplay/repeats:2\",$", MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"aggregate_name\": \"mean\",$", MR_Next},
-           {"\"iterations\": 2,$", MR_Next},
-           {"\"name\": \"BM_SummaryDisplay/repeats:2_median\",$"},
-           {"\"run_name\": \"BM_SummaryDisplay/repeats:2\",$", MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"aggregate_name\": \"median\",$", MR_Next},
-           {"\"iterations\": 2,$", MR_Next},
-           {"\"name\": \"BM_SummaryDisplay/repeats:2_stddev\",$"},
-           {"\"run_name\": \"BM_SummaryDisplay/repeats:2\",$", MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"aggregate_name\": \"stddev\",$", MR_Next},
-           {"\"iterations\": 2,$", MR_Next}});
-ADD_CASES(TC_CSVOut,
-          {{".*BM_SummaryDisplay/repeats:2 ", MR_Not},
-           {"^\"BM_SummaryDisplay/repeats:2_mean\",%csv_report$"},
-           {"^\"BM_SummaryDisplay/repeats:2_median\",%csv_report$"},
-           {"^\"BM_SummaryDisplay/repeats:2_stddev\",%csv_report$"}});
-
-// Test repeats with custom time unit.
-void BM_RepeatTimeUnit(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-}
-BENCHMARK(BM_RepeatTimeUnit)
-    ->Repetitions(3)
-    ->ReportAggregatesOnly()
-    ->Unit(benchmark::kMicrosecond);
-ADD_CASES(
-    TC_ConsoleOut,
-    {{".*BM_RepeatTimeUnit/repeats:3 ", MR_Not},
-     {"^BM_RepeatTimeUnit/repeats:3_mean %console_us_time_only_report [ ]*3$"},
-     {"^BM_RepeatTimeUnit/repeats:3_median %console_us_time_only_report [ "
-      "]*3$"},
-     {"^BM_RepeatTimeUnit/repeats:3_stddev %console_us_time_only_report [ "
-      "]*3$"}});
-ADD_CASES(TC_JSONOut,
-          {{".*BM_RepeatTimeUnit/repeats:3 ", MR_Not},
-           {"\"name\": \"BM_RepeatTimeUnit/repeats:3_mean\",$"},
-           {"\"run_name\": \"BM_RepeatTimeUnit/repeats:3\",$", MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"aggregate_name\": \"mean\",$", MR_Next},
-           {"\"iterations\": 3,$", MR_Next},
-           {"\"time_unit\": \"us\",?$"},
-           {"\"name\": \"BM_RepeatTimeUnit/repeats:3_median\",$"},
-           {"\"run_name\": \"BM_RepeatTimeUnit/repeats:3\",$", MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"aggregate_name\": \"median\",$", MR_Next},
-           {"\"iterations\": 3,$", MR_Next},
-           {"\"time_unit\": \"us\",?$"},
-           {"\"name\": \"BM_RepeatTimeUnit/repeats:3_stddev\",$"},
-           {"\"run_name\": \"BM_RepeatTimeUnit/repeats:3\",$", MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"aggregate_name\": \"stddev\",$", MR_Next},
-           {"\"iterations\": 3,$", MR_Next},
-           {"\"time_unit\": \"us\",?$"}});
-ADD_CASES(TC_CSVOut,
-          {{".*BM_RepeatTimeUnit/repeats:3 ", MR_Not},
-           {"^\"BM_RepeatTimeUnit/repeats:3_mean\",%csv_us_report$"},
-           {"^\"BM_RepeatTimeUnit/repeats:3_median\",%csv_us_report$"},
-           {"^\"BM_RepeatTimeUnit/repeats:3_stddev\",%csv_us_report$"}});
-
-// ========================================================================= //
-// -------------------- Testing user-provided statistics ------------------- //
-// ========================================================================= //
-
-const auto UserStatistics = [](const std::vector<double>& v) {
-  return v.back();
-};
-void BM_UserStats(benchmark::State& state) {
-  for (auto _ : state) {
-    state.SetIterationTime(150 / 10e8);
-  }
-}
-// clang-format off
-BENCHMARK(BM_UserStats)
-  ->Repetitions(3)
-  ->Iterations(5)
-  ->UseManualTime()
-  ->ComputeStatistics("", UserStatistics);
-// clang-format on
-
-// check that user-provided stats is calculated, and is after the default-ones
-// empty string as name is intentional, it would sort before anything else
-ADD_CASES(TC_ConsoleOut, {{"^BM_UserStats/iterations:5/repeats:3/manual_time [ "
-                           "]* 150 ns %time [ ]*5$"},
-                          {"^BM_UserStats/iterations:5/repeats:3/manual_time [ "
-                           "]* 150 ns %time [ ]*5$"},
-                          {"^BM_UserStats/iterations:5/repeats:3/manual_time [ "
-                           "]* 150 ns %time [ ]*5$"},
-                          {"^BM_UserStats/iterations:5/repeats:3/"
-                           "manual_time_mean [ ]* 150 ns %time [ ]*3$"},
-                          {"^BM_UserStats/iterations:5/repeats:3/"
-                           "manual_time_median [ ]* 150 ns %time [ ]*3$"},
-                          {"^BM_UserStats/iterations:5/repeats:3/"
-                           "manual_time_stddev [ ]* 0.000 ns %time [ ]*3$"},
-                          {"^BM_UserStats/iterations:5/repeats:3/manual_time_ "
-                           "[ ]* 150 ns %time [ ]*3$"}});
-ADD_CASES(
-    TC_JSONOut,
-    {{"\"name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$"},
-     {"\"run_name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$",
-      MR_Next},
-     {"\"run_type\": \"iteration\",$", MR_Next},
-     {"\"iterations\": 5,$", MR_Next},
-     {"\"real_time\": 1\\.5(0)*e\\+(0)*2,$", MR_Next},
-     {"\"name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$"},
-     {"\"run_name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$",
-      MR_Next},
-     {"\"run_type\": \"iteration\",$", MR_Next},
-     {"\"iterations\": 5,$", MR_Next},
-     {"\"real_time\": 1\\.5(0)*e\\+(0)*2,$", MR_Next},
-     {"\"name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$"},
-     {"\"run_name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$",
-      MR_Next},
-     {"\"run_type\": \"iteration\",$", MR_Next},
-     {"\"iterations\": 5,$", MR_Next},
-     {"\"real_time\": 1\\.5(0)*e\\+(0)*2,$", MR_Next},
-     {"\"name\": \"BM_UserStats/iterations:5/repeats:3/manual_time_mean\",$"},
-     {"\"run_name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$",
-      MR_Next},
-     {"\"run_type\": \"aggregate\",$", MR_Next},
-     {"\"aggregate_name\": \"mean\",$", MR_Next},
-     {"\"iterations\": 3,$", MR_Next},
-     {"\"real_time\": 1\\.5(0)*e\\+(0)*2,$", MR_Next},
-     {"\"name\": \"BM_UserStats/iterations:5/repeats:3/manual_time_median\",$"},
-     {"\"run_name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$",
-      MR_Next},
-     {"\"run_type\": \"aggregate\",$", MR_Next},
-     {"\"aggregate_name\": \"median\",$", MR_Next},
-     {"\"iterations\": 3,$", MR_Next},
-     {"\"real_time\": 1\\.5(0)*e\\+(0)*2,$", MR_Next},
-     {"\"name\": \"BM_UserStats/iterations:5/repeats:3/manual_time_stddev\",$"},
-     {"\"run_name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$",
-      MR_Next},
-     {"\"run_type\": \"aggregate\",$", MR_Next},
-     {"\"aggregate_name\": \"stddev\",$", MR_Next},
-     {"\"iterations\": 3,$", MR_Next},
-     {"\"real_time\": %float,$", MR_Next},
-     {"\"name\": \"BM_UserStats/iterations:5/repeats:3/manual_time_\",$"},
-     {"\"run_name\": \"BM_UserStats/iterations:5/repeats:3/manual_time\",$",
-      MR_Next},
-     {"\"run_type\": \"aggregate\",$", MR_Next},
-     {"\"aggregate_name\": \"\",$", MR_Next},
-     {"\"iterations\": 3,$", MR_Next},
-     {"\"real_time\": 1\\.5(0)*e\\+(0)*2,$", MR_Next}});
-ADD_CASES(
-    TC_CSVOut,
-    {{"^\"BM_UserStats/iterations:5/repeats:3/manual_time\",%csv_report$"},
-     {"^\"BM_UserStats/iterations:5/repeats:3/manual_time\",%csv_report$"},
-     {"^\"BM_UserStats/iterations:5/repeats:3/manual_time\",%csv_report$"},
-     {"^\"BM_UserStats/iterations:5/repeats:3/manual_time_mean\",%csv_report$"},
-     {"^\"BM_UserStats/iterations:5/repeats:3/"
-      "manual_time_median\",%csv_report$"},
-     {"^\"BM_UserStats/iterations:5/repeats:3/"
-      "manual_time_stddev\",%csv_report$"},
-     {"^\"BM_UserStats/iterations:5/repeats:3/manual_time_\",%csv_report$"}});
-
-// ========================================================================= //
-// --------------------------- TEST CASES END ------------------------------ //
-// ========================================================================= //
-
-int main(int argc, char* argv[]) { RunOutputTests(argc, argv); }
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/test/skip_with_error_test.cc b/gnu/llvm/libcxx/utils/google-benchmark/test/skip_with_error_test.cc
deleted file mode 100644
index 06579772ff7..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/test/skip_with_error_test.cc
+++ /dev/null
@@ -1,189 +0,0 @@
-
-#undef NDEBUG
-#include <cassert>
-#include <vector>
-
-#include "../src/check.h"  // NOTE: check.h is for internal use only!
-#include "benchmark/benchmark.h"
-
-namespace {
-
-class TestReporter : public benchmark::ConsoleReporter {
- public:
-  virtual bool ReportContext(const Context& context) {
-    return ConsoleReporter::ReportContext(context);
-  };
-
-  virtual void ReportRuns(const std::vector<Run>& report) {
-    all_runs_.insert(all_runs_.end(), begin(report), end(report));
-    ConsoleReporter::ReportRuns(report);
-  }
-
-  TestReporter() {}
-  virtual ~TestReporter() {}
-
-  mutable std::vector<Run> all_runs_;
-};
-
-struct TestCase {
-  std::string name;
-  bool error_occurred;
-  std::string error_message;
-
-  typedef benchmark::BenchmarkReporter::Run Run;
-
-  void CheckRun(Run const& run) const {
-    CHECK(name == run.benchmark_name())
-        << "expected " << name << " got " << run.benchmark_name();
-    CHECK(error_occurred == run.error_occurred);
-    CHECK(error_message == run.error_message);
-    if (error_occurred) {
-      // CHECK(run.iterations == 0);
-    } else {
-      CHECK(run.iterations != 0);
-    }
-  }
-};
-
-std::vector<TestCase> ExpectedResults;
-
-int AddCases(const char* base_name, std::initializer_list<TestCase> const& v) {
-  for (auto TC : v) {
-    TC.name = base_name + TC.name;
-    ExpectedResults.push_back(std::move(TC));
-  }
-  return 0;
-}
-
-#define CONCAT(x, y) CONCAT2(x, y)
-#define CONCAT2(x, y) x##y
-#define ADD_CASES(...) int CONCAT(dummy, __LINE__) = AddCases(__VA_ARGS__)
-
-}  // end namespace
-
-void BM_error_before_running(benchmark::State& state) {
-  state.SkipWithError("error message");
-  while (state.KeepRunning()) {
-    assert(false);
-  }
-}
-BENCHMARK(BM_error_before_running);
-ADD_CASES("BM_error_before_running", {{"", true, "error message"}});
-
-void BM_error_before_running_batch(benchmark::State& state) {
-  state.SkipWithError("error message");
-  while (state.KeepRunningBatch(17)) {
-    assert(false);
-  }
-}
-BENCHMARK(BM_error_before_running_batch);
-ADD_CASES("BM_error_before_running_batch", {{"", true, "error message"}});
-
-void BM_error_before_running_range_for(benchmark::State& state) {
-  state.SkipWithError("error message");
-  for (auto _ : state) {
-    assert(false);
-  }
-}
-BENCHMARK(BM_error_before_running_range_for);
-ADD_CASES("BM_error_before_running_range_for", {{"", true, "error message"}});
-
-void BM_error_during_running(benchmark::State& state) {
-  int first_iter = true;
-  while (state.KeepRunning()) {
-    if (state.range(0) == 1 && state.thread_index <= (state.threads / 2)) {
-      assert(first_iter);
-      first_iter = false;
-      state.SkipWithError("error message");
-    } else {
-      state.PauseTiming();
-      state.ResumeTiming();
-    }
-  }
-}
-BENCHMARK(BM_error_during_running)->Arg(1)->Arg(2)->ThreadRange(1, 8);
-ADD_CASES("BM_error_during_running", {{"/1/threads:1", true, "error message"},
-                                      {"/1/threads:2", true, "error message"},
-                                      {"/1/threads:4", true, "error message"},
-                                      {"/1/threads:8", true, "error message"},
-                                      {"/2/threads:1", false, ""},
-                                      {"/2/threads:2", false, ""},
-                                      {"/2/threads:4", false, ""},
-                                      {"/2/threads:8", false, ""}});
-
-void BM_error_during_running_ranged_for(benchmark::State& state) {
-  assert(state.max_iterations > 3 && "test requires at least a few iterations");
-  int first_iter = true;
-  // NOTE: Users should not write the for loop explicitly.
-  for (auto It = state.begin(), End = state.end(); It != End; ++It) {
-    if (state.range(0) == 1) {
-      assert(first_iter);
-      first_iter = false;
-      state.SkipWithError("error message");
-      // Test the unfortunate but documented behavior that the ranged-for loop
-      // doesn't automatically terminate when SkipWithError is set.
-      assert(++It != End);
-      break;  // Required behavior
-    }
-  }
-}
-BENCHMARK(BM_error_during_running_ranged_for)->Arg(1)->Arg(2)->Iterations(5);
-ADD_CASES("BM_error_during_running_ranged_for",
-          {{"/1/iterations:5", true, "error message"},
-           {"/2/iterations:5", false, ""}});
-
-void BM_error_after_running(benchmark::State& state) {
-  for (auto _ : state) {
-    benchmark::DoNotOptimize(state.iterations());
-  }
-  if (state.thread_index <= (state.threads / 2))
-    state.SkipWithError("error message");
-}
-BENCHMARK(BM_error_after_running)->ThreadRange(1, 8);
-ADD_CASES("BM_error_after_running", {{"/threads:1", true, "error message"},
-                                     {"/threads:2", true, "error message"},
-                                     {"/threads:4", true, "error message"},
-                                     {"/threads:8", true, "error message"}});
-
-void BM_error_while_paused(benchmark::State& state) {
-  bool first_iter = true;
-  while (state.KeepRunning()) {
-    if (state.range(0) == 1 && state.thread_index <= (state.threads / 2)) {
-      assert(first_iter);
-      first_iter = false;
-      state.PauseTiming();
-      state.SkipWithError("error message");
-    } else {
-      state.PauseTiming();
-      state.ResumeTiming();
-    }
-  }
-}
-BENCHMARK(BM_error_while_paused)->Arg(1)->Arg(2)->ThreadRange(1, 8);
-ADD_CASES("BM_error_while_paused", {{"/1/threads:1", true, "error message"},
-                                    {"/1/threads:2", true, "error message"},
-                                    {"/1/threads:4", true, "error message"},
-                                    {"/1/threads:8", true, "error message"},
-                                    {"/2/threads:1", false, ""},
-                                    {"/2/threads:2", false, ""},
-                                    {"/2/threads:4", false, ""},
-                                    {"/2/threads:8", false, ""}});
-
-int main(int argc, char* argv[]) {
-  benchmark::Initialize(&argc, argv);
-
-  TestReporter test_reporter;
-  benchmark::RunSpecifiedBenchmarks(&test_reporter);
-
-  typedef benchmark::BenchmarkReporter::Run Run;
-  auto EB = ExpectedResults.begin();
-
-  for (Run const& run : test_reporter.all_runs_) {
-    assert(EB != ExpectedResults.end());
-    EB->CheckRun(run);
-    ++EB;
-  }
-  assert(EB == ExpectedResults.end());
-
-  return 0;
-}
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/test/state_assembly_test.cc b/gnu/llvm/libcxx/utils/google-benchmark/test/state_assembly_test.cc
deleted file mode 100644
index abe9a4ddb56..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/test/state_assembly_test.cc
+++ /dev/null
@@ -1,68 +0,0 @@
-#include <benchmark/benchmark.h>
-
-#ifdef __clang__
-#pragma clang diagnostic ignored "-Wreturn-type"
-#endif
-
-// clang-format off
-extern "C" {
-  extern int ExternInt;
-  benchmark::State& GetState();
-  void Fn();
-}
-// clang-format on
-
-using benchmark::State;
-
-// CHECK-LABEL: test_for_auto_loop:
-extern "C" int test_for_auto_loop() {
-  State& S = GetState();
-  int x = 42;
-  // CHECK: 	[[CALL:call(q)*]]	_ZN9benchmark5State16StartKeepRunningEv
-  // CHECK-NEXT: testq %rbx, %rbx
-  // CHECK-NEXT: je [[LOOP_END:.*]]
-
-  for (auto _ : S) {
-    // CHECK: .L[[LOOP_HEAD:[a-zA-Z0-9_]+]]:
-    // CHECK-GNU-NEXT: subq $1, %rbx
-    // CHECK-CLANG-NEXT: {{(addq \$1,|incq)}} %rax
-    // CHECK-NEXT: jne .L[[LOOP_HEAD]]
-    benchmark::DoNotOptimize(x);
-  }
-  // CHECK: [[LOOP_END]]:
-  // CHECK: [[CALL]]	_ZN9benchmark5State17FinishKeepRunningEv
-
-  // CHECK: movl $101, %eax
-  // CHECK: ret
-  return 101;
-}
-
-// CHECK-LABEL: test_while_loop:
-extern "C" int test_while_loop() {
-  State& S = GetState();
-  int x = 42;
-
-  // CHECK: j{{(e|mp)}} .L[[LOOP_HEADER:[a-zA-Z0-9_]+]]
-  // CHECK-NEXT: .L[[LOOP_BODY:[a-zA-Z0-9_]+]]:
-  while (S.KeepRunning()) {
-    // CHECK-GNU-NEXT: subq $1, %[[IREG:[a-z]+]]
-    // CHECK-CLANG-NEXT: {{(addq \$-1,|decq)}} %[[IREG:[a-z]+]]
-    // CHECK: movq %[[IREG]], [[DEST:.*]]
-    benchmark::DoNotOptimize(x);
-  }
-  // CHECK-DAG: movq [[DEST]], %[[IREG]]
-  // CHECK-DAG: testq %[[IREG]], %[[IREG]]
-  // CHECK-DAG: jne .L[[LOOP_BODY]]
-  // CHECK-DAG: .L[[LOOP_HEADER]]:
-
-  // CHECK: cmpb $0
-  // CHECK-NEXT: jne .L[[LOOP_END:[a-zA-Z0-9_]+]]
-  // CHECK: [[CALL:call(q)*]] _ZN9benchmark5State16StartKeepRunningEv
-
-  // CHECK: .L[[LOOP_END]]:
-  // CHECK: [[CALL]] _ZN9benchmark5State17FinishKeepRunningEv
-
-  // CHECK: movl $101, %eax
-  // CHECK: ret
-  return 101;
-}
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/test/statistics_gtest.cc b/gnu/llvm/libcxx/utils/google-benchmark/test/statistics_gtest.cc
deleted file mode 100644
index 99e314920c5..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/test/statistics_gtest.cc
+++ /dev/null
@@ -1,28 +0,0 @@
-//===---------------------------------------------------------------------===//
-// statistics_test - Unit tests for src/statistics.cc
-//===---------------------------------------------------------------------===//
-
-#include "../src/statistics.h"
-#include "gtest/gtest.h"
-
-namespace {
-TEST(StatisticsTest, Mean) {
-  EXPECT_DOUBLE_EQ(benchmark::StatisticsMean({42, 42, 42, 42}), 42.0);
-  EXPECT_DOUBLE_EQ(benchmark::StatisticsMean({1, 2, 3, 4}), 2.5);
-  EXPECT_DOUBLE_EQ(benchmark::StatisticsMean({1, 2, 5, 10, 10, 14}), 7.0);
-}
-
-TEST(StatisticsTest, Median) {
-  EXPECT_DOUBLE_EQ(benchmark::StatisticsMedian({42, 42, 42, 42}), 42.0);
-  EXPECT_DOUBLE_EQ(benchmark::StatisticsMedian({1, 2, 3, 4}), 2.5);
-  EXPECT_DOUBLE_EQ(benchmark::StatisticsMedian({1, 2, 5, 10, 10}), 5.0);
-}
-
-TEST(StatisticsTest, StdDev) {
-  EXPECT_DOUBLE_EQ(benchmark::StatisticsStdDev({101, 101, 101, 101}), 0.0);
-  EXPECT_DOUBLE_EQ(benchmark::StatisticsStdDev({1, 2, 3}), 1.0);
-  EXPECT_FLOAT_EQ(benchmark::StatisticsStdDev({1.5, 2.4, 3.3, 4.2, 5.1}),
-                  1.42302495);
-}
-
-}  // end namespace
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/test/string_util_gtest.cc b/gnu/llvm/libcxx/utils/google-benchmark/test/string_util_gtest.cc
deleted file mode 100644
index 2c5d073f613..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/test/string_util_gtest.cc
+++ /dev/null
@@ -1,146 +0,0 @@
-//===---------------------------------------------------------------------===//
-// statistics_test - Unit tests for src/statistics.cc
-//===---------------------------------------------------------------------===//
-
-#include "../src/string_util.h"
-#include "gtest/gtest.h"
-
-namespace {
-TEST(StringUtilTest, stoul) {
-  {
-    size_t pos = 0;
-    EXPECT_EQ(0ul, benchmark::stoul("0", &pos));
-    EXPECT_EQ(1ul, pos);
-  }
-  {
-    size_t pos = 0;
-    EXPECT_EQ(7ul, benchmark::stoul("7", &pos));
-    EXPECT_EQ(1ul, pos);
-  }
-  {
-    size_t pos = 0;
-    EXPECT_EQ(135ul, benchmark::stoul("135", &pos));
-    EXPECT_EQ(3ul, pos);
-  }
-#if ULONG_MAX == 0xFFFFFFFFul
-  {
-    size_t pos = 0;
-    EXPECT_EQ(0xFFFFFFFFul, benchmark::stoul("4294967295", &pos));
-    EXPECT_EQ(10ul, pos);
-  }
-#elif ULONG_MAX == 0xFFFFFFFFFFFFFFFFul
-  {
-    size_t pos = 0;
-    EXPECT_EQ(0xFFFFFFFFFFFFFFFFul, benchmark::stoul("18446744073709551615", &pos));
-    EXPECT_EQ(20ul, pos);
-  }
-#endif
-  {
-    size_t pos = 0;
-    EXPECT_EQ(10ul, benchmark::stoul("1010", &pos, 2));
-    EXPECT_EQ(4ul, pos);
-  }
-  {
-    size_t pos = 0;
-    EXPECT_EQ(520ul, benchmark::stoul("1010", &pos, 8));
-    EXPECT_EQ(4ul, pos);
-  }
-  {
-    size_t pos = 0;
-    EXPECT_EQ(1010ul, benchmark::stoul("1010", &pos, 10));
-    EXPECT_EQ(4ul, pos);
-  }
-  {
-    size_t pos = 0;
-    EXPECT_EQ(4112ul, benchmark::stoul("1010", &pos, 16));
-    EXPECT_EQ(4ul, pos);
-  }
-  {
-    size_t pos = 0;
-    EXPECT_EQ(0xBEEFul, benchmark::stoul("BEEF", &pos, 16));
-    EXPECT_EQ(4ul, pos);
-  }
-  {
-    ASSERT_THROW(benchmark::stoul("this is a test"), std::invalid_argument);
-  }
-}
-
-TEST(StringUtilTest, stoi) {
-  {
-    size_t pos = 0;
-    EXPECT_EQ(0, benchmark::stoi("0", &pos));
-    EXPECT_EQ(1ul, pos);
-  }
-  {
-    size_t pos = 0;
-    EXPECT_EQ(-17, benchmark::stoi("-17", &pos));
-    EXPECT_EQ(3ul, pos);
-  }
-  {
-    size_t pos = 0;
-    EXPECT_EQ(1357, benchmark::stoi("1357", &pos));
-    EXPECT_EQ(4ul, pos);
-  }
-  {
-    size_t pos = 0;
-    EXPECT_EQ(10, benchmark::stoi("1010", &pos, 2));
-    EXPECT_EQ(4ul, pos);
-  }
-  {
-    size_t pos = 0;
-    EXPECT_EQ(520, benchmark::stoi("1010", &pos, 8));
-    EXPECT_EQ(4ul, pos);
-  }
-  {
-    size_t pos = 0;
-    EXPECT_EQ(1010, benchmark::stoi("1010", &pos, 10));
-    EXPECT_EQ(4ul, pos);
-  }
-  {
-    size_t pos = 0;
-    EXPECT_EQ(4112, benchmark::stoi("1010", &pos, 16));
-    EXPECT_EQ(4ul, pos);
-  }
-  {
-    size_t pos = 0;
-    EXPECT_EQ(0xBEEF, benchmark::stoi("BEEF", &pos, 16));
-    EXPECT_EQ(4ul, pos);
-  }
-  {
-    ASSERT_THROW(benchmark::stoi("this is a test"), std::invalid_argument);
-  }
-}
-
-TEST(StringUtilTest, stod) {
-  {
-    size_t pos = 0;
-    EXPECT_EQ(0.0, benchmark::stod("0", &pos));
-    EXPECT_EQ(1ul, pos);
-  }
-  {
-    size_t pos = 0;
-    EXPECT_EQ(-84.0, benchmark::stod("-84", &pos));
-    EXPECT_EQ(3ul, pos);
-  }
-  {
-    size_t pos = 0;
-    EXPECT_EQ(1234.0, benchmark::stod("1234", &pos));
-    EXPECT_EQ(4ul, pos);
-  }
-  {
-    size_t pos = 0;
-    EXPECT_EQ(1.5, benchmark::stod("1.5", &pos));
-    EXPECT_EQ(3ul, pos);
-  }
-  {
-    size_t pos = 0;
-    /* Note: exactly representable as double */
-    EXPECT_EQ(-1.25e+9, benchmark::stod("-1.25e+9", &pos));
-    EXPECT_EQ(8ul, pos);
-  }
-  {
-    ASSERT_THROW(benchmark::stod("this is a test"), std::invalid_argument);
-  }
-}
-
-}  // end namespace
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/test/templated_fixture_test.cc b/gnu/llvm/libcxx/utils/google-benchmark/test/templated_fixture_test.cc
deleted file mode 100644
index fe9865cc776..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/test/templated_fixture_test.cc
+++ /dev/null
@@ -1,28 +0,0 @@
-
-#include "benchmark/benchmark.h"
-
-#include <cassert>
-#include <memory>
-
-template <typename T>
-class MyFixture : public ::benchmark::Fixture {
- public:
-  MyFixture() : data(0) {}
-
-  T data;
-};
-
-BENCHMARK_TEMPLATE_F(MyFixture, Foo, int)(benchmark::State& st) {
-  for (auto _ : st) {
-    data += 1;
-  }
-}
-
-BENCHMARK_TEMPLATE_DEFINE_F(MyFixture, Bar, double)(benchmark::State& st) {
-  for (auto _ : st) {
-    data += 1.0;
-  }
-}
-BENCHMARK_REGISTER_F(MyFixture, Bar);
-
-BENCHMARK_MAIN();
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/test/user_counters_tabular_test.cc b/gnu/llvm/libcxx/utils/google-benchmark/test/user_counters_tabular_test.cc
deleted file mode 100644
index 030e98916c3..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/test/user_counters_tabular_test.cc
+++ /dev/null
@@ -1,268 +0,0 @@
-
-#undef NDEBUG
-
-#include "benchmark/benchmark.h"
-#include "output_test.h"
-
-// @todo: <jpmag> this checks the full output at once; the rule for
-// CounterSet1 was failing because it was not matching "^[-]+$".
-// @todo: <jpmag> check that the counters are vertically aligned.
-ADD_CASES(
-    TC_ConsoleOut,
-    {
-        // keeping these lines long improves readability, so:
-        // clang-format off
-    {"^[-]+$", MR_Next},
-    {"^Benchmark %s Time %s CPU %s Iterations %s Bar %s Bat %s Baz %s Foo %s Frob %s Lob$", MR_Next},
-    {"^[-]+$", MR_Next},
-    {"^BM_Counters_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_Counters_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_Counters_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_Counters_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_Counters_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_CounterRates_Tabular/threads:%int %console_report [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s$", MR_Next},
-    {"^BM_CounterRates_Tabular/threads:%int %console_report [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s$", MR_Next},
-    {"^BM_CounterRates_Tabular/threads:%int %console_report [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s$", MR_Next},
-    {"^BM_CounterRates_Tabular/threads:%int %console_report [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s$", MR_Next},
-    {"^BM_CounterRates_Tabular/threads:%int %console_report [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s [ ]*%hrfloat/s$", MR_Next},
-    {"^[-]+$", MR_Next},
-    {"^Benchmark %s Time %s CPU %s Iterations %s Bar %s Baz %s Foo$", MR_Next},
-    {"^[-]+$", MR_Next},
-    {"^BM_CounterSet0_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_CounterSet0_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_CounterSet0_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_CounterSet0_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_CounterSet0_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_CounterSet1_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_CounterSet1_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_CounterSet1_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_CounterSet1_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_CounterSet1_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^[-]+$", MR_Next},
-    {"^Benchmark %s Time %s CPU %s Iterations %s Bat %s Baz %s Foo$", MR_Next},
-    {"^[-]+$", MR_Next},
-    {"^BM_CounterSet2_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_CounterSet2_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_CounterSet2_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_CounterSet2_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$", MR_Next},
-    {"^BM_CounterSet2_Tabular/threads:%int %console_report [ ]*%hrfloat [ ]*%hrfloat [ ]*%hrfloat$"},
-        // clang-format on
-    });
-ADD_CASES(TC_CSVOut, {{"%csv_header,"
-                       "\"Bar\",\"Bat\",\"Baz\",\"Foo\",\"Frob\",\"Lob\""}});
-
-// ========================================================================= //
-// ------------------------- Tabular Counters Output ----------------------- //
-// ========================================================================= //
-
-void BM_Counters_Tabular(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  namespace bm = benchmark;
-  state.counters.insert({
-      {"Foo", {1, bm::Counter::kAvgThreads}},
-      {"Bar", {2, bm::Counter::kAvgThreads}},
-      {"Baz", {4, bm::Counter::kAvgThreads}},
-      {"Bat", {8, bm::Counter::kAvgThreads}},
-      {"Frob", {16, bm::Counter::kAvgThreads}},
-      {"Lob", {32, bm::Counter::kAvgThreads}},
-  });
-}
-BENCHMARK(BM_Counters_Tabular)->ThreadRange(1, 16);
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_Tabular/threads:%int\",$"},
-           {"\"run_name\": \"BM_Counters_Tabular/threads:%int\",$", MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"Bar\": %float,$", MR_Next},
-           {"\"Bat\": %float,$", MR_Next},
-           {"\"Baz\": %float,$", MR_Next},
-           {"\"Foo\": %float,$", MR_Next},
-           {"\"Frob\": %float,$", MR_Next},
-           {"\"Lob\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_Counters_Tabular/threads:%int\",%csv_report,"
-                       "%float,%float,%float,%float,%float,%float$"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckTabular(Results const& e) {
-  CHECK_COUNTER_VALUE(e, int, "Foo", EQ, 1);
-  CHECK_COUNTER_VALUE(e, int, "Bar", EQ, 2);
-  CHECK_COUNTER_VALUE(e, int, "Baz", EQ, 4);
-  CHECK_COUNTER_VALUE(e, int, "Bat", EQ, 8);
-  CHECK_COUNTER_VALUE(e, int, "Frob", EQ, 16);
-  CHECK_COUNTER_VALUE(e, int, "Lob", EQ, 32);
-}
-CHECK_BENCHMARK_RESULTS("BM_Counters_Tabular/threads:%int", &CheckTabular);
-
-// ========================================================================= //
-// -------------------- Tabular+Rate Counters Output ----------------------- //
-// ========================================================================= //
-
-void BM_CounterRates_Tabular(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  namespace bm = benchmark;
-  state.counters.insert({
-      {"Foo", {1, bm::Counter::kAvgThreadsRate}},
-      {"Bar", {2, bm::Counter::kAvgThreadsRate}},
-      {"Baz", {4, bm::Counter::kAvgThreadsRate}},
-      {"Bat", {8, bm::Counter::kAvgThreadsRate}},
-      {"Frob", {16, bm::Counter::kAvgThreadsRate}},
-      {"Lob", {32, bm::Counter::kAvgThreadsRate}},
-  });
-}
-BENCHMARK(BM_CounterRates_Tabular)->ThreadRange(1, 16);
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_CounterRates_Tabular/threads:%int\",$"},
-           {"\"run_name\": \"BM_CounterRates_Tabular/threads:%int\",$",
-            MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"Bar\": %float,$", MR_Next},
-           {"\"Bat\": %float,$", MR_Next},
-           {"\"Baz\": %float,$", MR_Next},
-           {"\"Foo\": %float,$", MR_Next},
-           {"\"Frob\": %float,$", MR_Next},
-           {"\"Lob\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_CounterRates_Tabular/threads:%int\",%csv_report,"
-                       "%float,%float,%float,%float,%float,%float$"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckTabularRate(Results const& e) {
-  double t = e.DurationCPUTime();
-  CHECK_FLOAT_COUNTER_VALUE(e, "Foo", EQ, 1. / t, 0.001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "Bar", EQ, 2. / t, 0.001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "Baz", EQ, 4. / t, 0.001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "Bat", EQ, 8. / t, 0.001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "Frob", EQ, 16. / t, 0.001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "Lob", EQ, 32. / t, 0.001);
-}
-CHECK_BENCHMARK_RESULTS("BM_CounterRates_Tabular/threads:%int",
-                        &CheckTabularRate);
-
-// ========================================================================= //
-// ------------------------- Tabular Counters Output ----------------------- //
-// ========================================================================= //
-
-// set only some of the counters
-void BM_CounterSet0_Tabular(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  namespace bm = benchmark;
-  state.counters.insert({
-      {"Foo", {10, bm::Counter::kAvgThreads}},
-      {"Bar", {20, bm::Counter::kAvgThreads}},
-      {"Baz", {40, bm::Counter::kAvgThreads}},
-  });
-}
-BENCHMARK(BM_CounterSet0_Tabular)->ThreadRange(1, 16);
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_CounterSet0_Tabular/threads:%int\",$"},
-           {"\"run_name\": \"BM_CounterSet0_Tabular/threads:%int\",$", MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"Bar\": %float,$", MR_Next},
-           {"\"Baz\": %float,$", MR_Next},
-           {"\"Foo\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_CounterSet0_Tabular/threads:%int\",%csv_report,"
-                       "%float,,%float,%float,,"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckSet0(Results const& e) {
-  CHECK_COUNTER_VALUE(e, int, "Foo", EQ, 10);
-  CHECK_COUNTER_VALUE(e, int, "Bar", EQ, 20);
-  CHECK_COUNTER_VALUE(e, int, "Baz", EQ, 40);
-}
-CHECK_BENCHMARK_RESULTS("BM_CounterSet0_Tabular", &CheckSet0);
-
-// again.
-void BM_CounterSet1_Tabular(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  namespace bm = benchmark;
-  state.counters.insert({
-      {"Foo", {15, bm::Counter::kAvgThreads}},
-      {"Bar", {25, bm::Counter::kAvgThreads}},
-      {"Baz", {45, bm::Counter::kAvgThreads}},
-  });
-}
-BENCHMARK(BM_CounterSet1_Tabular)->ThreadRange(1, 16);
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_CounterSet1_Tabular/threads:%int\",$"},
-           {"\"run_name\": \"BM_CounterSet1_Tabular/threads:%int\",$", MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"Bar\": %float,$", MR_Next},
-           {"\"Baz\": %float,$", MR_Next},
-           {"\"Foo\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_CounterSet1_Tabular/threads:%int\",%csv_report,"
-                       "%float,,%float,%float,,"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckSet1(Results const& e) {
-  CHECK_COUNTER_VALUE(e, int, "Foo", EQ, 15);
-  CHECK_COUNTER_VALUE(e, int, "Bar", EQ, 25);
-  CHECK_COUNTER_VALUE(e, int, "Baz", EQ, 45);
-}
-CHECK_BENCHMARK_RESULTS("BM_CounterSet1_Tabular/threads:%int", &CheckSet1);
-
-// ========================================================================= //
-// ------------------------- Tabular Counters Output ----------------------- //
-// ========================================================================= //
-
-// set only some of the counters, different set now.
-void BM_CounterSet2_Tabular(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  namespace bm = benchmark;
-  state.counters.insert({
-      {"Foo", {10, bm::Counter::kAvgThreads}},
-      {"Bat", {30, bm::Counter::kAvgThreads}},
-      {"Baz", {40, bm::Counter::kAvgThreads}},
-  });
-}
-BENCHMARK(BM_CounterSet2_Tabular)->ThreadRange(1, 16);
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_CounterSet2_Tabular/threads:%int\",$"},
-           {"\"run_name\": \"BM_CounterSet2_Tabular/threads:%int\",$", MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"Bat\": %float,$", MR_Next},
-           {"\"Baz\": %float,$", MR_Next},
-           {"\"Foo\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_CounterSet2_Tabular/threads:%int\",%csv_report,"
-                       ",%float,%float,%float,,"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckSet2(Results const& e) {
-  CHECK_COUNTER_VALUE(e, int, "Foo", EQ, 10);
-  CHECK_COUNTER_VALUE(e, int, "Bat", EQ, 30);
-  CHECK_COUNTER_VALUE(e, int, "Baz", EQ, 40);
-}
-CHECK_BENCHMARK_RESULTS("BM_CounterSet2_Tabular", &CheckSet2);
-
-// ========================================================================= //
-// --------------------------- TEST CASES END ------------------------------ //
-// ========================================================================= //
-
-int main(int argc, char* argv[]) { RunOutputTests(argc, argv); }
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/test/user_counters_test.cc b/gnu/llvm/libcxx/utils/google-benchmark/test/user_counters_test.cc
deleted file mode 100644
index bb0d6b4c5a9..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/test/user_counters_test.cc
+++ /dev/null
@@ -1,408 +0,0 @@
-
-#undef NDEBUG
-
-#include "benchmark/benchmark.h"
-#include "output_test.h"
-
-// ========================================================================= //
-// ---------------------- Testing Prologue Output -------------------------- //
-// ========================================================================= //
-
-// clang-format off
-
-ADD_CASES(TC_ConsoleOut,
-          {{"^[-]+$", MR_Next},
-           {"^Benchmark %s Time %s CPU %s Iterations UserCounters...$", MR_Next},
-           {"^[-]+$", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"%csv_header,\"bar\",\"foo\""}});
-
-// clang-format on
-
-// ========================================================================= //
-// ------------------------- Simple Counters Output ------------------------ //
-// ========================================================================= //
-
-void BM_Counters_Simple(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  state.counters["foo"] = 1;
-  state.counters["bar"] = 2 * (double)state.iterations();
-}
-BENCHMARK(BM_Counters_Simple);
-ADD_CASES(TC_ConsoleOut,
-          {{"^BM_Counters_Simple %console_report bar=%hrfloat foo=%hrfloat$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_Counters_Simple\",$"},
-                       {"\"run_name\": \"BM_Counters_Simple\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"iterations\": %int,$", MR_Next},
-                       {"\"real_time\": %float,$", MR_Next},
-                       {"\"cpu_time\": %float,$", MR_Next},
-                       {"\"time_unit\": \"ns\",$", MR_Next},
-                       {"\"bar\": %float,$", MR_Next},
-                       {"\"foo\": %float$", MR_Next},
-                       {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_Counters_Simple\",%csv_report,%float,%float$"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckSimple(Results const& e) {
-  double its = e.NumIterations();
-  CHECK_COUNTER_VALUE(e, int, "foo", EQ, 1);
-  // check that the value of bar is within 0.1% of the expected value
-  CHECK_FLOAT_COUNTER_VALUE(e, "bar", EQ, 2. * its, 0.001);
-}
-CHECK_BENCHMARK_RESULTS("BM_Counters_Simple", &CheckSimple);
-
-// ========================================================================= //
-// --------------------- Counters+Items+Bytes/s Output --------------------- //
-// ========================================================================= //
-
-namespace {
-int num_calls1 = 0;
-}
-void BM_Counters_WithBytesAndItemsPSec(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  state.counters["foo"] = 1;
-  state.counters["bar"] = ++num_calls1;
-  state.SetBytesProcessed(364);
-  state.SetItemsProcessed(150);
-}
-BENCHMARK(BM_Counters_WithBytesAndItemsPSec);
-ADD_CASES(TC_ConsoleOut, {{"^BM_Counters_WithBytesAndItemsPSec %console_report "
-                           "bar=%hrfloat bytes_per_second=%hrfloat/s "
-                           "foo=%hrfloat items_per_second=%hrfloat/s$"}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_WithBytesAndItemsPSec\",$"},
-           {"\"run_name\": \"BM_Counters_WithBytesAndItemsPSec\",$", MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"bar\": %float,$", MR_Next},
-           {"\"bytes_per_second\": %float,$", MR_Next},
-           {"\"foo\": %float,$", MR_Next},
-           {"\"items_per_second\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_Counters_WithBytesAndItemsPSec\","
-                       "%csv_bytes_items_report,%float,%float$"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckBytesAndItemsPSec(Results const& e) {
-  double t = e.DurationCPUTime();  // this (and not real time) is the time used
-  CHECK_COUNTER_VALUE(e, int, "foo", EQ, 1);
-  CHECK_COUNTER_VALUE(e, int, "bar", EQ, num_calls1);
-  // check that the values are within 0.1% of the expected values
-  CHECK_FLOAT_RESULT_VALUE(e, "bytes_per_second", EQ, 364. / t, 0.001);
-  CHECK_FLOAT_RESULT_VALUE(e, "items_per_second", EQ, 150. / t, 0.001);
-}
-CHECK_BENCHMARK_RESULTS("BM_Counters_WithBytesAndItemsPSec",
-                        &CheckBytesAndItemsPSec);
-
-// ========================================================================= //
-// ------------------------- Rate Counters Output -------------------------- //
-// ========================================================================= //
-
-void BM_Counters_Rate(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  namespace bm = benchmark;
-  state.counters["foo"] = bm::Counter{1, bm::Counter::kIsRate};
-  state.counters["bar"] = bm::Counter{2, bm::Counter::kIsRate};
-}
-BENCHMARK(BM_Counters_Rate);
-ADD_CASES(
-    TC_ConsoleOut,
-    {{"^BM_Counters_Rate %console_report bar=%hrfloat/s foo=%hrfloat/s$"}});
-ADD_CASES(TC_JSONOut, {{"\"name\": \"BM_Counters_Rate\",$"},
-                       {"\"run_name\": \"BM_Counters_Rate\",$", MR_Next},
-                       {"\"run_type\": \"iteration\",$", MR_Next},
-                       {"\"iterations\": %int,$", MR_Next},
-                       {"\"real_time\": %float,$", MR_Next},
-                       {"\"cpu_time\": %float,$", MR_Next},
-                       {"\"time_unit\": \"ns\",$", MR_Next},
-                       {"\"bar\": %float,$", MR_Next},
-                       {"\"foo\": %float$", MR_Next},
-                       {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_Counters_Rate\",%csv_report,%float,%float$"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckRate(Results const& e) {
-  double t = e.DurationCPUTime();  // this (and not real time) is the time used
-  // check that the values are within 0.1% of the expected values
-  CHECK_FLOAT_COUNTER_VALUE(e, "foo", EQ, 1. / t, 0.001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "bar", EQ, 2. / t, 0.001);
-}
-CHECK_BENCHMARK_RESULTS("BM_Counters_Rate", &CheckRate);
-
-// ========================================================================= //
-// ------------------------- Thread Counters Output ------------------------ //
-// ========================================================================= //
-
-void BM_Counters_Threads(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  state.counters["foo"] = 1;
-  state.counters["bar"] = 2;
-}
-BENCHMARK(BM_Counters_Threads)->ThreadRange(1, 8);
-ADD_CASES(TC_ConsoleOut, {{"^BM_Counters_Threads/threads:%int %console_report "
-                           "bar=%hrfloat foo=%hrfloat$"}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_Threads/threads:%int\",$"},
-           {"\"run_name\": \"BM_Counters_Threads/threads:%int\",$", MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"bar\": %float,$", MR_Next},
-           {"\"foo\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(
-    TC_CSVOut,
-    {{"^\"BM_Counters_Threads/threads:%int\",%csv_report,%float,%float$"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckThreads(Results const& e) {
-  CHECK_COUNTER_VALUE(e, int, "foo", EQ, e.NumThreads());
-  CHECK_COUNTER_VALUE(e, int, "bar", EQ, 2 * e.NumThreads());
-}
-CHECK_BENCHMARK_RESULTS("BM_Counters_Threads/threads:%int", &CheckThreads);
-
-// ========================================================================= //
-// ---------------------- ThreadAvg Counters Output ------------------------ //
-// ========================================================================= //
-
-void BM_Counters_AvgThreads(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  namespace bm = benchmark;
-  state.counters["foo"] = bm::Counter{1, bm::Counter::kAvgThreads};
-  state.counters["bar"] = bm::Counter{2, bm::Counter::kAvgThreads};
-}
-BENCHMARK(BM_Counters_AvgThreads)->ThreadRange(1, 8);
-ADD_CASES(TC_ConsoleOut, {{"^BM_Counters_AvgThreads/threads:%int "
-                           "%console_report bar=%hrfloat foo=%hrfloat$"}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_AvgThreads/threads:%int\",$"},
-           {"\"run_name\": \"BM_Counters_AvgThreads/threads:%int\",$", MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"bar\": %float,$", MR_Next},
-           {"\"foo\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(
-    TC_CSVOut,
-    {{"^\"BM_Counters_AvgThreads/threads:%int\",%csv_report,%float,%float$"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckAvgThreads(Results const& e) {
-  CHECK_COUNTER_VALUE(e, int, "foo", EQ, 1);
-  CHECK_COUNTER_VALUE(e, int, "bar", EQ, 2);
-}
-CHECK_BENCHMARK_RESULTS("BM_Counters_AvgThreads/threads:%int",
-                        &CheckAvgThreads);
-
-// ========================================================================= //
-// ---------------------- ThreadAvg Counters Output ------------------------ //
-// ========================================================================= //
-
-void BM_Counters_AvgThreadsRate(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  namespace bm = benchmark;
-  state.counters["foo"] = bm::Counter{1, bm::Counter::kAvgThreadsRate};
-  state.counters["bar"] = bm::Counter{2, bm::Counter::kAvgThreadsRate};
-}
-BENCHMARK(BM_Counters_AvgThreadsRate)->ThreadRange(1, 8);
-ADD_CASES(TC_ConsoleOut, {{"^BM_Counters_AvgThreadsRate/threads:%int "
-                           "%console_report bar=%hrfloat/s foo=%hrfloat/s$"}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_AvgThreadsRate/threads:%int\",$"},
-           {"\"run_name\": \"BM_Counters_AvgThreadsRate/threads:%int\",$",
-            MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"bar\": %float,$", MR_Next},
-           {"\"foo\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_Counters_AvgThreadsRate/"
-                       "threads:%int\",%csv_report,%float,%float$"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckAvgThreadsRate(Results const& e) {
-  CHECK_FLOAT_COUNTER_VALUE(e, "foo", EQ, 1. / e.DurationCPUTime(), 0.001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "bar", EQ, 2. / e.DurationCPUTime(), 0.001);
-}
-CHECK_BENCHMARK_RESULTS("BM_Counters_AvgThreadsRate/threads:%int",
-                        &CheckAvgThreadsRate);
-
-// ========================================================================= //
-// ------------------- IterationInvariant Counters Output ------------------ //
-// ========================================================================= //
-
-void BM_Counters_IterationInvariant(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  namespace bm = benchmark;
-  state.counters["foo"] = bm::Counter{1, bm::Counter::kIsIterationInvariant};
-  state.counters["bar"] = bm::Counter{2, bm::Counter::kIsIterationInvariant};
-}
-BENCHMARK(BM_Counters_IterationInvariant);
-ADD_CASES(TC_ConsoleOut, {{"^BM_Counters_IterationInvariant %console_report "
-                           "bar=%hrfloat foo=%hrfloat$"}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_IterationInvariant\",$"},
-           {"\"run_name\": \"BM_Counters_IterationInvariant\",$", MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"bar\": %float,$", MR_Next},
-           {"\"foo\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_CSVOut,
-          {{"^\"BM_Counters_IterationInvariant\",%csv_report,%float,%float$"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckIterationInvariant(Results const& e) {
-  double its = e.NumIterations();
-  // check that the values are within 0.1% of the expected value
-  CHECK_FLOAT_COUNTER_VALUE(e, "foo", EQ, its, 0.001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "bar", EQ, 2. * its, 0.001);
-}
-CHECK_BENCHMARK_RESULTS("BM_Counters_IterationInvariant",
-                        &CheckIterationInvariant);
-
-// ========================================================================= //
-// ----------------- IterationInvariantRate Counters Output ---------------- //
-// ========================================================================= //
-
-void BM_Counters_kIsIterationInvariantRate(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  namespace bm = benchmark;
-  state.counters["foo"] =
-      bm::Counter{1, bm::Counter::kIsIterationInvariantRate};
-  state.counters["bar"] =
-      bm::Counter{2, bm::Counter::kIsRate | bm::Counter::kIsIterationInvariant};
-}
-BENCHMARK(BM_Counters_kIsIterationInvariantRate);
-ADD_CASES(TC_ConsoleOut, {{"^BM_Counters_kIsIterationInvariantRate "
-                           "%console_report bar=%hrfloat/s foo=%hrfloat/s$"}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_kIsIterationInvariantRate\",$"},
-           {"\"run_name\": \"BM_Counters_kIsIterationInvariantRate\",$",
-            MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"bar\": %float,$", MR_Next},
-           {"\"foo\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_Counters_kIsIterationInvariantRate\",%csv_report,"
-                       "%float,%float$"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckIsIterationInvariantRate(Results const& e) {
-  double its = e.NumIterations();
-  double t = e.DurationCPUTime();  // this (and not real time) is the time used
-  // check that the values are within 0.1% of the expected values
-  CHECK_FLOAT_COUNTER_VALUE(e, "foo", EQ, its * 1. / t, 0.001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "bar", EQ, its * 2. / t, 0.001);
-}
-CHECK_BENCHMARK_RESULTS("BM_Counters_kIsIterationInvariantRate",
-                        &CheckIsIterationInvariantRate);
-
-// ========================================================================= //
-// ------------------- AvgIterations Counters Output ------------------ //
-// ========================================================================= //
-
-void BM_Counters_AvgIterations(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  namespace bm = benchmark;
-  state.counters["foo"] = bm::Counter{1, bm::Counter::kAvgIterations};
-  state.counters["bar"] = bm::Counter{2, bm::Counter::kAvgIterations};
-}
-BENCHMARK(BM_Counters_AvgIterations);
-ADD_CASES(TC_ConsoleOut, {{"^BM_Counters_AvgIterations %console_report "
-                           "bar=%hrfloat foo=%hrfloat$"}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_AvgIterations\",$"},
-           {"\"run_name\": \"BM_Counters_AvgIterations\",$", MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"bar\": %float,$", MR_Next},
-           {"\"foo\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_CSVOut,
-          {{"^\"BM_Counters_AvgIterations\",%csv_report,%float,%float$"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckAvgIterations(Results const& e) {
-  double its = e.NumIterations();
-  // check that the values are within 0.1% of the expected value
-  CHECK_FLOAT_COUNTER_VALUE(e, "foo", EQ, 1. / its, 0.001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "bar", EQ, 2. / its, 0.001);
-}
-CHECK_BENCHMARK_RESULTS("BM_Counters_AvgIterations", &CheckAvgIterations);
-
-// ========================================================================= //
-// ----------------- AvgIterationsRate Counters Output ---------------- //
-// ========================================================================= //
-
-void BM_Counters_kAvgIterationsRate(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  namespace bm = benchmark;
-  state.counters["foo"] = bm::Counter{1, bm::Counter::kAvgIterationsRate};
-  state.counters["bar"] =
-      bm::Counter{2, bm::Counter::kIsRate | bm::Counter::kAvgIterations};
-}
-BENCHMARK(BM_Counters_kAvgIterationsRate);
-ADD_CASES(TC_ConsoleOut, {{"^BM_Counters_kAvgIterationsRate "
-                           "%console_report bar=%hrfloat/s foo=%hrfloat/s$"}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_kAvgIterationsRate\",$"},
-           {"\"run_name\": \"BM_Counters_kAvgIterationsRate\",$", MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"bar\": %float,$", MR_Next},
-           {"\"foo\": %float$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_CSVOut, {{"^\"BM_Counters_kAvgIterationsRate\",%csv_report,"
-                       "%float,%float$"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckAvgIterationsRate(Results const& e) {
-  double its = e.NumIterations();
-  double t = e.DurationCPUTime();  // this (and not real time) is the time used
-  // check that the values are within 0.1% of the expected values
-  CHECK_FLOAT_COUNTER_VALUE(e, "foo", EQ, 1. / its / t, 0.001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "bar", EQ, 2. / its / t, 0.001);
-}
-CHECK_BENCHMARK_RESULTS("BM_Counters_kAvgIterationsRate",
-                        &CheckAvgIterationsRate);
-
-// ========================================================================= //
-// --------------------------- TEST CASES END ------------------------------ //
-// ========================================================================= //
-
-int main(int argc, char* argv[]) { RunOutputTests(argc, argv); }
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/test/user_counters_thousands_test.cc b/gnu/llvm/libcxx/utils/google-benchmark/test/user_counters_thousands_test.cc
deleted file mode 100644
index fa0ef972047..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/test/user_counters_thousands_test.cc
+++ /dev/null
@@ -1,161 +0,0 @@
-
-#undef NDEBUG
-
-#include "benchmark/benchmark.h"
-#include "output_test.h"
-
-// ========================================================================= //
-// ------------------------ Thousands Customisation ------------------------ //
-// ========================================================================= //
-
-void BM_Counters_Thousands(benchmark::State& state) {
-  for (auto _ : state) {
-  }
-  namespace bm = benchmark;
-  state.counters.insert({
-      {"t0_1000000DefaultBase",
-       bm::Counter(1000 * 1000, bm::Counter::kDefaults)},
-      {"t1_1000000Base1000", bm::Counter(1000 * 1000, bm::Counter::kDefaults,
-                                         benchmark::Counter::OneK::kIs1000)},
-      {"t2_1000000Base1024", bm::Counter(1000 * 1000, bm::Counter::kDefaults,
-                                         benchmark::Counter::OneK::kIs1024)},
-      {"t3_1048576Base1000", bm::Counter(1024 * 1024, bm::Counter::kDefaults,
-                                         benchmark::Counter::OneK::kIs1000)},
-      {"t4_1048576Base1024", bm::Counter(1024 * 1024, bm::Counter::kDefaults,
-                                         benchmark::Counter::OneK::kIs1024)},
-  });
-}
-BENCHMARK(BM_Counters_Thousands)->Repetitions(2);
-ADD_CASES(
-    TC_ConsoleOut,
-    {
-        {"^BM_Counters_Thousands/repeats:2 %console_report "
-         "t0_1000000DefaultBase=1000k "
-         "t1_1000000Base1000=1000k t2_1000000Base1024=976.56[23]k "
-         "t3_1048576Base1000=1048.58k t4_1048576Base1024=1024k$"},
-        {"^BM_Counters_Thousands/repeats:2 %console_report "
-         "t0_1000000DefaultBase=1000k "
-         "t1_1000000Base1000=1000k t2_1000000Base1024=976.56[23]k "
-         "t3_1048576Base1000=1048.58k t4_1048576Base1024=1024k$"},
-        {"^BM_Counters_Thousands/repeats:2_mean %console_report "
-         "t0_1000000DefaultBase=1000k t1_1000000Base1000=1000k "
-         "t2_1000000Base1024=976.56[23]k t3_1048576Base1000=1048.58k "
-         "t4_1048576Base1024=1024k$"},
-        {"^BM_Counters_Thousands/repeats:2_median %console_report "
-         "t0_1000000DefaultBase=1000k t1_1000000Base1000=1000k "
-         "t2_1000000Base1024=976.56[23]k t3_1048576Base1000=1048.58k "
-         "t4_1048576Base1024=1024k$"},
-        {"^BM_Counters_Thousands/repeats:2_stddev %console_time_only_report [ "
-         "]*2 t0_1000000DefaultBase=0 t1_1000000Base1000=0 "
-         "t2_1000000Base1024=0 t3_1048576Base1000=0 t4_1048576Base1024=0$"},
-    });
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_Thousands/repeats:2\",$"},
-           {"\"run_name\": \"BM_Counters_Thousands/repeats:2\",$", MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"t0_1000000DefaultBase\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t1_1000000Base1000\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t2_1000000Base1024\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t3_1048576Base1000\": 1\\.048576(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t4_1048576Base1024\": 1\\.048576(0)*e\\+(0)*6$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_Thousands/repeats:2\",$"},
-           {"\"run_name\": \"BM_Counters_Thousands/repeats:2\",$", MR_Next},
-           {"\"run_type\": \"iteration\",$", MR_Next},
-           {"\"iterations\": %int,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"t0_1000000DefaultBase\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t1_1000000Base1000\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t2_1000000Base1024\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t3_1048576Base1000\": 1\\.048576(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t4_1048576Base1024\": 1\\.048576(0)*e\\+(0)*6$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_Thousands/repeats:2_mean\",$"},
-           {"\"run_name\": \"BM_Counters_Thousands/repeats:2\",$", MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"aggregate_name\": \"mean\",$", MR_Next},
-           {"\"iterations\": 2,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"t0_1000000DefaultBase\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t1_1000000Base1000\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t2_1000000Base1024\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t3_1048576Base1000\": 1\\.048576(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t4_1048576Base1024\": 1\\.048576(0)*e\\+(0)*6$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_Thousands/repeats:2_median\",$"},
-           {"\"run_name\": \"BM_Counters_Thousands/repeats:2\",$", MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"aggregate_name\": \"median\",$", MR_Next},
-           {"\"iterations\": 2,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"t0_1000000DefaultBase\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t1_1000000Base1000\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t2_1000000Base1024\": 1\\.(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t3_1048576Base1000\": 1\\.048576(0)*e\\+(0)*6,$", MR_Next},
-           {"\"t4_1048576Base1024\": 1\\.048576(0)*e\\+(0)*6$", MR_Next},
-           {"}", MR_Next}});
-ADD_CASES(TC_JSONOut,
-          {{"\"name\": \"BM_Counters_Thousands/repeats:2_stddev\",$"},
-           {"\"run_name\": \"BM_Counters_Thousands/repeats:2\",$", MR_Next},
-           {"\"run_type\": \"aggregate\",$", MR_Next},
-           {"\"aggregate_name\": \"stddev\",$", MR_Next},
-           {"\"iterations\": 2,$", MR_Next},
-           {"\"real_time\": %float,$", MR_Next},
-           {"\"cpu_time\": %float,$", MR_Next},
-           {"\"time_unit\": \"ns\",$", MR_Next},
-           {"\"t0_1000000DefaultBase\": 0\\.(0)*e\\+(0)*,$", MR_Next},
-           {"\"t1_1000000Base1000\": 0\\.(0)*e\\+(0)*,$", MR_Next},
-           {"\"t2_1000000Base1024\": 0\\.(0)*e\\+(0)*,$", MR_Next},
-           {"\"t3_1048576Base1000\": 0\\.(0)*e\\+(0)*,$", MR_Next},
-           {"\"t4_1048576Base1024\": 0\\.(0)*e\\+(0)*$", MR_Next},
-           {"}", MR_Next}});
-
-ADD_CASES(
-    TC_CSVOut,
-    {{"^\"BM_Counters_Thousands/"
-      "repeats:2\",%csv_report,1e\\+(0)*6,1e\\+(0)*6,1e\\+(0)*6,1\\.04858e\\+("
-      "0)*6,1\\.04858e\\+(0)*6$"},
-     {"^\"BM_Counters_Thousands/"
-      "repeats:2\",%csv_report,1e\\+(0)*6,1e\\+(0)*6,1e\\+(0)*6,1\\.04858e\\+("
-      "0)*6,1\\.04858e\\+(0)*6$"},
-     {"^\"BM_Counters_Thousands/"
-      "repeats:2_mean\",%csv_report,1e\\+(0)*6,1e\\+(0)*6,1e\\+(0)*6,1\\."
-      "04858e\\+(0)*6,1\\.04858e\\+(0)*6$"},
-     {"^\"BM_Counters_Thousands/"
-      "repeats:2_median\",%csv_report,1e\\+(0)*6,1e\\+(0)*6,1e\\+(0)*6,1\\."
-      "04858e\\+(0)*6,1\\.04858e\\+(0)*6$"},
-     {"^\"BM_Counters_Thousands/repeats:2_stddev\",%csv_report,0,0,0,0,0$"}});
-// VS2013 does not allow this function to be passed as a lambda argument
-// to CHECK_BENCHMARK_RESULTS()
-void CheckThousands(Results const& e) {
-  if (e.name != "BM_Counters_Thousands/repeats:2")
-    return;  // Do not check the aggregates!
-
-  // check that the values are within 0.01% of the expected values
-  CHECK_FLOAT_COUNTER_VALUE(e, "t0_1000000DefaultBase", EQ, 1000 * 1000,
-                            0.0001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "t1_1000000Base1000", EQ, 1000 * 1000, 0.0001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "t2_1000000Base1024", EQ, 1000 * 1000, 0.0001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "t3_1048576Base1000", EQ, 1024 * 1024, 0.0001);
-  CHECK_FLOAT_COUNTER_VALUE(e, "t4_1048576Base1024", EQ, 1024 * 1024, 0.0001);
-}
-CHECK_BENCHMARK_RESULTS("BM_Counters_Thousands", &CheckThousands);
-
-// ========================================================================= //
-// --------------------------- TEST CASES END ------------------------------ //
-// ========================================================================= //
-
-int main(int argc, char* argv[]) { RunOutputTests(argc, argv); }
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/tools/BUILD.bazel b/gnu/llvm/libcxx/utils/google-benchmark/tools/BUILD.bazel
deleted file mode 100644
index 5895883a2eb..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/tools/BUILD.bazel
+++ /dev/null
@@ -1,19 +0,0 @@
-load("@py_deps//:requirements.bzl", "requirement")
-
-py_library(
-    name = "gbench",
-    srcs = glob(["gbench/*.py"]),
-    deps = [
-      requirement("numpy"),
-      requirement("scipy"),
-    ],
-)
-
-py_binary(
-    name = "compare",
-    srcs = ["compare.py"],
-    python_version = "PY2",
-    deps = [
-        ":gbench",
-    ],
-)
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/tools/compare.py b/gnu/llvm/libcxx/utils/google-benchmark/tools/compare.py
deleted file mode 100755
index 539ace6fb16..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/tools/compare.py
+++ /dev/null
@@ -1,408 +0,0 @@
-#!/usr/bin/env python
-
-import unittest
-"""
-compare.py - versatile benchmark output compare tool
-"""
-
-import argparse
-from argparse import ArgumentParser
-import sys
-import gbench
-from gbench import util, report
-from gbench.util import *
-
-
-def check_inputs(in1, in2, flags):
-    """
-    Perform checking on the user provided inputs and diagnose any abnormalities
-    """
-    in1_kind, in1_err = classify_input_file(in1)
-    in2_kind, in2_err = classify_input_file(in2)
-    output_file = find_benchmark_flag('--benchmark_out=', flags)
-    output_type = find_benchmark_flag('--benchmark_out_format=', flags)
-    if in1_kind == IT_Executable and in2_kind == IT_Executable and output_file:
-        print(("WARNING: '--benchmark_out=%s' will be passed to both "
-               "benchmarks causing it to be overwritten") % output_file)
-    if in1_kind == IT_JSON and in2_kind == IT_JSON and len(flags) > 0:
-        print("WARNING: passing optional flags has no effect since both "
-              "inputs are JSON")
-    if output_type is not None and output_type != 'json':
-        print(("ERROR: passing '--benchmark_out_format=%s' to 'compare.py`"
-               " is not supported.") % output_type)
-        sys.exit(1)
-
-
-def create_parser():
-    parser = ArgumentParser(
-        description='versatile benchmark output compare tool')
-
-    parser.add_argument(
-        '-a',
-        '--display_aggregates_only',
-        dest='display_aggregates_only',
-        action="store_true",
-        help="If there are repetitions, by default, we display everything - the"
-             " actual runs, and the aggregates computed. Sometimes, it is "
-             "desirable to only view the aggregates. E.g. when there are a lot "
-             "of repetitions. Do note that only the display is affected. "
-             "Internally, all the actual runs are still used, e.g. for U test.")
-
-    utest = parser.add_argument_group()
-    utest.add_argument(
-        '--no-utest',
-        dest='utest',
-        default=True,
-        action="store_false",
-        help="The tool can do a two-tailed Mann-Whitney U test with the null hypothesis that it is equally likely that a randomly selected value from one sample will be less than or greater than a randomly selected value from a second sample.\nWARNING: requires **LARGE** (no less than {}) number of repetitions to be meaningful!\nThe test is being done by default, if at least {} repetitions were done.\nThis option can disable the U Test.".format(report.UTEST_OPTIMAL_REPETITIONS, report.UTEST_MIN_REPETITIONS))
-    alpha_default = 0.05
-    utest.add_argument(
-        "--alpha",
-        dest='utest_alpha',
-        default=alpha_default,
-        type=float,
-        help=("significance level alpha. if the calculated p-value is below this value, then the result is said to be statistically significant and the null hypothesis is rejected.\n(default: %0.4f)") %
-        alpha_default)
-
-    subparsers = parser.add_subparsers(
-        help='This tool has multiple modes of operation:',
-        dest='mode')
-
-    parser_a = subparsers.add_parser(
-        'benchmarks',
-        help='The most simple use-case, compare all the output of these two benchmarks')
-    baseline = parser_a.add_argument_group(
-        'baseline', 'The benchmark baseline')
-    baseline.add_argument(
-        'test_baseline',
-        metavar='test_baseline',
-        type=argparse.FileType('r'),
-        nargs=1,
-        help='A benchmark executable or JSON output file')
-    contender = parser_a.add_argument_group(
-        'contender', 'The benchmark that will be compared against the baseline')
-    contender.add_argument(
-        'test_contender',
-        metavar='test_contender',
-        type=argparse.FileType('r'),
-        nargs=1,
-        help='A benchmark executable or JSON output file')
-    parser_a.add_argument(
-        'benchmark_options',
-        metavar='benchmark_options',
-        nargs=argparse.REMAINDER,
-        help='Arguments to pass when running benchmark executables')
-
-    parser_b = subparsers.add_parser(
-        'filters', help='Compare filter one with the filter two of benchmark')
-    baseline = parser_b.add_argument_group(
-        'baseline', 'The benchmark baseline')
-    baseline.add_argument(
-        'test',
-        metavar='test',
-        type=argparse.FileType('r'),
-        nargs=1,
-        help='A benchmark executable or JSON output file')
-    baseline.add_argument(
-        'filter_baseline',
-        metavar='filter_baseline',
-        type=str,
-        nargs=1,
-        help='The first filter, that will be used as baseline')
-    contender = parser_b.add_argument_group(
-        'contender', 'The benchmark that will be compared against the baseline')
-    contender.add_argument(
-        'filter_contender',
-        metavar='filter_contender',
-        type=str,
-        nargs=1,
-        help='The second filter, that will be compared against the baseline')
-    parser_b.add_argument(
-        'benchmark_options',
-        metavar='benchmark_options',
-        nargs=argparse.REMAINDER,
-        help='Arguments to pass when running benchmark executables')
-
-    parser_c = subparsers.add_parser(
-        'benchmarksfiltered',
-        help='Compare filter one of first benchmark with filter two of the second benchmark')
-    baseline = parser_c.add_argument_group(
-        'baseline', 'The benchmark baseline')
-    baseline.add_argument(
-        'test_baseline',
-        metavar='test_baseline',
-        type=argparse.FileType('r'),
-        nargs=1,
-        help='A benchmark executable or JSON output file')
-    baseline.add_argument(
-        'filter_baseline',
-        metavar='filter_baseline',
-        type=str,
-        nargs=1,
-        help='The first filter, that will be used as baseline')
-    contender = parser_c.add_argument_group(
-        'contender', 'The benchmark that will be compared against the baseline')
-    contender.add_argument(
-        'test_contender',
-        metavar='test_contender',
-        type=argparse.FileType('r'),
-        nargs=1,
-        help='The second benchmark executable or JSON output file, that will be compared against the baseline')
-    contender.add_argument(
-        'filter_contender',
-        metavar='filter_contender',
-        type=str,
-        nargs=1,
-        help='The second filter, that will be compared against the baseline')
-    parser_c.add_argument(
-        'benchmark_options',
-        metavar='benchmark_options',
-        nargs=argparse.REMAINDER,
-        help='Arguments to pass when running benchmark executables')
-
-    return parser
-
-
-def main():
-    # Parse the command line flags
-    parser = create_parser()
-    args, unknown_args = parser.parse_known_args()
-    if args.mode is None:
-        parser.print_help()
-        exit(1)
-    assert not unknown_args
-    benchmark_options = args.benchmark_options
-
-    if args.mode == 'benchmarks':
-        test_baseline = args.test_baseline[0].name
-        test_contender = args.test_contender[0].name
-        filter_baseline = ''
-        filter_contender = ''
-
-        # NOTE: if test_baseline == test_contender, you are analyzing the stdev
-
-        description = 'Comparing %s to %s' % (test_baseline, test_contender)
-    elif args.mode == 'filters':
-        test_baseline = args.test[0].name
-        test_contender = args.test[0].name
-        filter_baseline = args.filter_baseline[0]
-        filter_contender = args.filter_contender[0]
-
-        # NOTE: if filter_baseline == filter_contender, you are analyzing the
-        # stdev
-
-        description = 'Comparing %s to %s (from %s)' % (
-            filter_baseline, filter_contender, args.test[0].name)
-    elif args.mode == 'benchmarksfiltered':
-        test_baseline = args.test_baseline[0].name
-        test_contender = args.test_contender[0].name
-        filter_baseline = args.filter_baseline[0]
-        filter_contender = args.filter_contender[0]
-
-        # NOTE: if test_baseline == test_contender and
-        # filter_baseline == filter_contender, you are analyzing the stdev
-
-        description = 'Comparing %s (from %s) to %s (from %s)' % (
-            filter_baseline, test_baseline, filter_contender, test_contender)
-    else:
-        # should never happen
-        print("Unrecognized mode of operation: '%s'" % args.mode)
-        parser.print_help()
-        exit(1)
-
-    check_inputs(test_baseline, test_contender, benchmark_options)
-
-    if args.display_aggregates_only:
-        benchmark_options += ['--benchmark_display_aggregates_only=true']
-
-    options_baseline = []
-    options_contender = []
-
-    if filter_baseline and filter_contender:
-        options_baseline = ['--benchmark_filter=%s' % filter_baseline]
-        options_contender = ['--benchmark_filter=%s' % filter_contender]
-
-    # Run the benchmarks and report the results
-    json1 = json1_orig = gbench.util.run_or_load_benchmark(
-        test_baseline, benchmark_options + options_baseline)
-    json2 = json2_orig = gbench.util.run_or_load_benchmark(
-        test_contender, benchmark_options + options_contender)
-
-    # Now, filter the benchmarks so that the difference report can work
-    if filter_baseline and filter_contender:
-        replacement = '[%s vs. %s]' % (filter_baseline, filter_contender)
-        json1 = gbench.report.filter_benchmark(
-            json1_orig, filter_baseline, replacement)
-        json2 = gbench.report.filter_benchmark(
-            json2_orig, filter_contender, replacement)
-
-    # Diff and output
-    output_lines = gbench.report.generate_difference_report(
-        json1, json2, args.display_aggregates_only,
-        args.utest, args.utest_alpha)
-    print(description)
-    for ln in output_lines:
-        print(ln)
-
-
-class TestParser(unittest.TestCase):
-    def setUp(self):
-        self.parser = create_parser()
-        testInputs = os.path.join(
-            os.path.dirname(
-                os.path.realpath(__file__)),
-            'gbench',
-            'Inputs')
-        self.testInput0 = os.path.join(testInputs, 'test1_run1.json')
-        self.testInput1 = os.path.join(testInputs, 'test1_run2.json')
-
-    def test_benchmarks_basic(self):
-        parsed = self.parser.parse_args(
-            ['benchmarks', self.testInput0, self.testInput1])
-        self.assertFalse(parsed.display_aggregates_only)
-        self.assertTrue(parsed.utest)
-        self.assertEqual(parsed.mode, 'benchmarks')
-        self.assertEqual(parsed.test_baseline[0].name, self.testInput0)
-        self.assertEqual(parsed.test_contender[0].name, self.testInput1)
-        self.assertFalse(parsed.benchmark_options)
-
-    def test_benchmarks_basic_without_utest(self):
-        parsed = self.parser.parse_args(
-            ['--no-utest', 'benchmarks', self.testInput0, self.testInput1])
-        self.assertFalse(parsed.display_aggregates_only)
-        self.assertFalse(parsed.utest)
-        self.assertEqual(parsed.utest_alpha, 0.05)
-        self.assertEqual(parsed.mode, 'benchmarks')
-        self.assertEqual(parsed.test_baseline[0].name, self.testInput0)
-        self.assertEqual(parsed.test_contender[0].name, self.testInput1)
-        self.assertFalse(parsed.benchmark_options)
-
-    def test_benchmarks_basic_display_aggregates_only(self):
-        parsed = self.parser.parse_args(
-            ['-a', 'benchmarks', self.testInput0, self.testInput1])
-        self.assertTrue(parsed.display_aggregates_only)
-        self.assertTrue(parsed.utest)
-        self.assertEqual(parsed.mode, 'benchmarks')
-        self.assertEqual(parsed.test_baseline[0].name, self.testInput0)
-        self.assertEqual(parsed.test_contender[0].name, self.testInput1)
-        self.assertFalse(parsed.benchmark_options)
-
-    def test_benchmarks_basic_with_utest_alpha(self):
-        parsed = self.parser.parse_args(
-            ['--alpha=0.314', 'benchmarks', self.testInput0, self.testInput1])
-        self.assertFalse(parsed.display_aggregates_only)
-        self.assertTrue(parsed.utest)
-        self.assertEqual(parsed.utest_alpha, 0.314)
-        self.assertEqual(parsed.mode, 'benchmarks')
-        self.assertEqual(parsed.test_baseline[0].name, self.testInput0)
-        self.assertEqual(parsed.test_contender[0].name, self.testInput1)
-        self.assertFalse(parsed.benchmark_options)
-
-    def test_benchmarks_basic_without_utest_with_utest_alpha(self):
-        parsed = self.parser.parse_args(
-            ['--no-utest', '--alpha=0.314', 'benchmarks', self.testInput0, self.testInput1])
-        self.assertFalse(parsed.display_aggregates_only)
-        self.assertFalse(parsed.utest)
-        self.assertEqual(parsed.utest_alpha, 0.314)
-        self.assertEqual(parsed.mode, 'benchmarks')
-        self.assertEqual(parsed.test_baseline[0].name, self.testInput0)
-        self.assertEqual(parsed.test_contender[0].name, self.testInput1)
-        self.assertFalse(parsed.benchmark_options)
-
-    def test_benchmarks_with_remainder(self):
-        parsed = self.parser.parse_args(
-            ['benchmarks', self.testInput0, self.testInput1, 'd'])
-        self.assertFalse(parsed.display_aggregates_only)
-        self.assertTrue(parsed.utest)
-        self.assertEqual(parsed.mode, 'benchmarks')
-        self.assertEqual(parsed.test_baseline[0].name, self.testInput0)
-        self.assertEqual(parsed.test_contender[0].name, self.testInput1)
-        self.assertEqual(parsed.benchmark_options, ['d'])
-
-    def test_benchmarks_with_remainder_after_doubleminus(self):
-        parsed = self.parser.parse_args(
-            ['benchmarks', self.testInput0, self.testInput1, '--', 'e'])
-        self.assertFalse(parsed.display_aggregates_only)
-        self.assertTrue(parsed.utest)
-        self.assertEqual(parsed.mode, 'benchmarks')
-        self.assertEqual(parsed.test_baseline[0].name, self.testInput0)
-        self.assertEqual(parsed.test_contender[0].name, self.testInput1)
-        self.assertEqual(parsed.benchmark_options, ['e'])
-
-    def test_filters_basic(self):
-        parsed = self.parser.parse_args(
-            ['filters', self.testInput0, 'c', 'd'])
-        self.assertFalse(parsed.display_aggregates_only)
-        self.assertTrue(parsed.utest)
-        self.assertEqual(parsed.mode, 'filters')
-        self.assertEqual(parsed.test[0].name, self.testInput0)
-        self.assertEqual(parsed.filter_baseline[0], 'c')
-        self.assertEqual(parsed.filter_contender[0], 'd')
-        self.assertFalse(parsed.benchmark_options)
-
-    def test_filters_with_remainder(self):
-        parsed = self.parser.parse_args(
-            ['filters', self.testInput0, 'c', 'd', 'e'])
-        self.assertFalse(parsed.display_aggregates_only)
-        self.assertTrue(parsed.utest)
-        self.assertEqual(parsed.mode, 'filters')
-        self.assertEqual(parsed.test[0].name, self.testInput0)
-        self.assertEqual(parsed.filter_baseline[0], 'c')
-        self.assertEqual(parsed.filter_contender[0], 'd')
-        self.assertEqual(parsed.benchmark_options, ['e'])
-
-    def test_filters_with_remainder_after_doubleminus(self):
-        parsed = self.parser.parse_args(
-            ['filters', self.testInput0, 'c', 'd', '--', 'f'])
-        self.assertFalse(parsed.display_aggregates_only)
-        self.assertTrue(parsed.utest)
-        self.assertEqual(parsed.mode, 'filters')
-        self.assertEqual(parsed.test[0].name, self.testInput0)
-        self.assertEqual(parsed.filter_baseline[0], 'c')
-        self.assertEqual(parsed.filter_contender[0], 'd')
-        self.assertEqual(parsed.benchmark_options, ['f'])
-
-    def test_benchmarksfiltered_basic(self):
-        parsed = self.parser.parse_args(
-            ['benchmarksfiltered', self.testInput0, 'c', self.testInput1, 'e'])
-        self.assertFalse(parsed.display_aggregates_only)
-        self.assertTrue(parsed.utest)
-        self.assertEqual(parsed.mode, 'benchmarksfiltered')
-        self.assertEqual(parsed.test_baseline[0].name, self.testInput0)
-        self.assertEqual(parsed.filter_baseline[0], 'c')
-        self.assertEqual(parsed.test_contender[0].name, self.testInput1)
-        self.assertEqual(parsed.filter_contender[0], 'e')
-        self.assertFalse(parsed.benchmark_options)
-
-    def test_benchmarksfiltered_with_remainder(self):
-        parsed = self.parser.parse_args(
-            ['benchmarksfiltered', self.testInput0, 'c', self.testInput1, 'e', 'f'])
-        self.assertFalse(parsed.display_aggregates_only)
-        self.assertTrue(parsed.utest)
-        self.assertEqual(parsed.mode, 'benchmarksfiltered')
-        self.assertEqual(parsed.test_baseline[0].name, self.testInput0)
-        self.assertEqual(parsed.filter_baseline[0], 'c')
-        self.assertEqual(parsed.test_contender[0].name, self.testInput1)
-        self.assertEqual(parsed.filter_contender[0], 'e')
-        self.assertEqual(parsed.benchmark_options[0], 'f')
-
-    def test_benchmarksfiltered_with_remainder_after_doubleminus(self):
-        parsed = self.parser.parse_args(
-            ['benchmarksfiltered', self.testInput0, 'c', self.testInput1, 'e', '--', 'g'])
-        self.assertFalse(parsed.display_aggregates_only)
-        self.assertTrue(parsed.utest)
-        self.assertEqual(parsed.mode, 'benchmarksfiltered')
-        self.assertEqual(parsed.test_baseline[0].name, self.testInput0)
-        self.assertEqual(parsed.filter_baseline[0], 'c')
-        self.assertEqual(parsed.test_contender[0].name, self.testInput1)
-        self.assertEqual(parsed.filter_contender[0], 'e')
-        self.assertEqual(parsed.benchmark_options[0], 'g')
-
-
-if __name__ == '__main__':
-    # unittest.main()
-    main()
-
-# vim: tabstop=4 expandtab shiftwidth=4 softtabstop=4
-# kate: tab-width: 4; replace-tabs on; indent-width 4; tab-indents: off;
-# kate: indent-mode python; remove-trailing-spaces modified;
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/tools/gbench/Inputs/test1_run1.json b/gnu/llvm/libcxx/utils/google-benchmark/tools/gbench/Inputs/test1_run1.json
deleted file mode 100644
index d7ec6a9c8f6..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/tools/gbench/Inputs/test1_run1.json
+++ /dev/null
@@ -1,102 +0,0 @@
-{
-  "context": {
-    "date": "2016-08-02 17:44:46",
-    "num_cpus": 4,
-    "mhz_per_cpu": 4228,
-    "cpu_scaling_enabled": false,
-    "library_build_type": "release"
-  },
-  "benchmarks": [
-    {
-      "name": "BM_SameTimes",
-      "iterations": 1000,
-      "real_time": 10,
-      "cpu_time": 10,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_2xFaster",
-      "iterations": 1000,
-      "real_time": 50,
-      "cpu_time": 50,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_2xSlower",
-      "iterations": 1000,
-      "real_time": 50,
-      "cpu_time": 50,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_1PercentFaster",
-      "iterations": 1000,
-      "real_time": 100,
-      "cpu_time": 100,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_1PercentSlower",
-      "iterations": 1000,
-      "real_time": 100,
-      "cpu_time": 100,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_10PercentFaster",
-      "iterations": 1000,
-      "real_time": 100,
-      "cpu_time": 100,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_10PercentSlower",
-      "iterations": 1000,
-      "real_time": 100,
-      "cpu_time": 100,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_100xSlower",
-      "iterations": 1000,
-      "real_time": 100,
-      "cpu_time": 100,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_100xFaster",
-      "iterations": 1000,
-      "real_time": 10000,
-      "cpu_time": 10000,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_10PercentCPUToTime",
-      "iterations": 1000,
-      "real_time": 100,
-      "cpu_time": 100,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_ThirdFaster",
-      "iterations": 1000,
-      "real_time": 100,
-      "cpu_time": 100,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_BadTimeUnit",
-      "iterations": 1000,
-      "real_time": 0.4,
-      "cpu_time": 0.5,
-      "time_unit": "s"
-    },
-    {
-      "name": "BM_DifferentTimeUnit",
-      "iterations": 1,
-      "real_time": 1,
-      "cpu_time": 1,
-      "time_unit": "s"
-    }
-  ]
-}
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/tools/gbench/Inputs/test1_run2.json b/gnu/llvm/libcxx/utils/google-benchmark/tools/gbench/Inputs/test1_run2.json
deleted file mode 100644
index 59a5ffaca4d..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/tools/gbench/Inputs/test1_run2.json
+++ /dev/null
@@ -1,102 +0,0 @@
-{
-  "context": {
-    "date": "2016-08-02 17:44:46",
-    "num_cpus": 4,
-    "mhz_per_cpu": 4228,
-    "cpu_scaling_enabled": false,
-    "library_build_type": "release"
-  },
-  "benchmarks": [
-    {
-      "name": "BM_SameTimes",
-      "iterations": 1000,
-      "real_time": 10,
-      "cpu_time": 10,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_2xFaster",
-      "iterations": 1000,
-      "real_time": 25,
-      "cpu_time": 25,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_2xSlower",
-      "iterations": 20833333,
-      "real_time": 100,
-      "cpu_time": 100,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_1PercentFaster",
-      "iterations": 1000,
-      "real_time": 98.9999999,
-      "cpu_time": 98.9999999,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_1PercentSlower",
-      "iterations": 1000,
-      "real_time": 100.9999999,
-      "cpu_time": 100.9999999,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_10PercentFaster",
-      "iterations": 1000,
-      "real_time": 90,
-      "cpu_time": 90,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_10PercentSlower",
-      "iterations": 1000,
-      "real_time": 110,
-      "cpu_time": 110,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_100xSlower",
-      "iterations": 1000,
-      "real_time": 1.0000e+04,
-      "cpu_time": 1.0000e+04,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_100xFaster",
-      "iterations": 1000,
-      "real_time": 100,
-      "cpu_time": 100,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_10PercentCPUToTime",
-      "iterations": 1000,
-      "real_time": 110,
-      "cpu_time": 90,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_ThirdFaster",
-      "iterations": 1000,
-      "real_time": 66.665,
-      "cpu_time": 66.664,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_BadTimeUnit",
-      "iterations": 1000,
-      "real_time": 0.04,
-      "cpu_time": 0.6,
-      "time_unit": "s"
-    },
-    {
-      "name": "BM_DifferentTimeUnit",
-      "iterations": 1,
-      "real_time": 1,
-      "cpu_time": 1,
-      "time_unit": "ns"
-    }
-  ]
-}
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/tools/gbench/Inputs/test2_run.json b/gnu/llvm/libcxx/utils/google-benchmark/tools/gbench/Inputs/test2_run.json
deleted file mode 100644
index 15bc6980304..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/tools/gbench/Inputs/test2_run.json
+++ /dev/null
@@ -1,81 +0,0 @@
-{
-  "context": {
-    "date": "2016-08-02 17:44:46",
-    "num_cpus": 4,
-    "mhz_per_cpu": 4228,
-    "cpu_scaling_enabled": false,
-    "library_build_type": "release"
-  },
-  "benchmarks": [
-    {
-      "name": "BM_Hi",
-      "iterations": 1234,
-      "real_time": 42,
-      "cpu_time": 24,
-      "time_unit": "ms"
-    },
-    {
-      "name": "BM_Zero",
-      "iterations": 1000,
-      "real_time": 10,
-      "cpu_time": 10,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_Zero/4",
-      "iterations": 4000,
-      "real_time": 40,
-      "cpu_time": 40,
-      "time_unit": "ns"
-    },
-    {
-      "name": "Prefix/BM_Zero",
-      "iterations": 2000,
-      "real_time": 20,
-      "cpu_time": 20,
-      "time_unit": "ns"
-    },
-    {
-      "name": "Prefix/BM_Zero/3",
-      "iterations": 3000,
-      "real_time": 30,
-      "cpu_time": 30,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_One",
-      "iterations": 5000,
-      "real_time": 5,
-      "cpu_time": 5,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_One/4",
-      "iterations": 2000,
-      "real_time": 20,
-      "cpu_time": 20,
-      "time_unit": "ns"
-    },
-    {
-      "name": "Prefix/BM_One",
-      "iterations": 1000,
-      "real_time": 10,
-      "cpu_time": 10,
-      "time_unit": "ns"
-    },
-    {
-      "name": "Prefix/BM_One/3",
-      "iterations": 1500,
-      "real_time": 15,
-      "cpu_time": 15,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_Bye",
-      "iterations": 5321,
-      "real_time": 11,
-      "cpu_time": 63,
-      "time_unit": "ns"
-    }
-  ]
-}
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/tools/gbench/Inputs/test3_run0.json b/gnu/llvm/libcxx/utils/google-benchmark/tools/gbench/Inputs/test3_run0.json
deleted file mode 100644
index 49f8b061437..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/tools/gbench/Inputs/test3_run0.json
+++ /dev/null
@@ -1,65 +0,0 @@
-{
-  "context": {
-    "date": "2016-08-02 17:44:46",
-    "num_cpus": 4,
-    "mhz_per_cpu": 4228,
-    "cpu_scaling_enabled": false,
-    "library_build_type": "release"
-  },
-  "benchmarks": [
-    {
-      "name": "BM_One",
-      "run_type": "aggregate",
-      "iterations": 1000,
-      "real_time": 10,
-      "cpu_time": 100,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_Two",
-      "iterations": 1000,
-      "real_time": 9,
-      "cpu_time": 90,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_Two",
-      "iterations": 1000,
-      "real_time": 8,
-      "cpu_time": 86,
-      "time_unit": "ns"
-    },
-    {
-      "name": "short",
-      "run_type": "aggregate",
-      "iterations": 1000,
-      "real_time": 8,
-      "cpu_time": 80,
-      "time_unit": "ns"
-    },
-    {
-      "name": "short",
-      "run_type": "aggregate",
-      "iterations": 1000,
-      "real_time": 8,
-      "cpu_time": 77,
-      "time_unit": "ns"
-    },
-    {
-      "name": "medium",
-      "run_type": "iteration",
-      "iterations": 1000,
-      "real_time": 8,
-      "cpu_time": 80,
-      "time_unit": "ns"
-    },
-    {
-      "name": "medium",
-      "run_type": "iteration",
-      "iterations": 1000,
-      "real_time": 9,
-      "cpu_time": 82,
-      "time_unit": "ns"
-    }
-  ]
-}
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/tools/gbench/Inputs/test3_run1.json b/gnu/llvm/libcxx/utils/google-benchmark/tools/gbench/Inputs/test3_run1.json
deleted file mode 100644
index acc5ba17aed..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/tools/gbench/Inputs/test3_run1.json
+++ /dev/null
@@ -1,65 +0,0 @@
-{
-  "context": {
-    "date": "2016-08-02 17:44:46",
-    "num_cpus": 4,
-    "mhz_per_cpu": 4228,
-    "cpu_scaling_enabled": false,
-    "library_build_type": "release"
-  },
-  "benchmarks": [
-    {
-      "name": "BM_One",
-      "iterations": 1000,
-      "real_time": 9,
-      "cpu_time": 110,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_Two",
-      "run_type": "aggregate",
-      "iterations": 1000,
-      "real_time": 10,
-      "cpu_time": 89,
-      "time_unit": "ns"
-    },
-    {
-      "name": "BM_Two",
-      "iterations": 1000,
-      "real_time": 7,
-      "cpu_time": 72,
-      "time_unit": "ns"
-    },
-    {
-      "name": "short",
-      "run_type": "aggregate",
-      "iterations": 1000,
-      "real_time": 7,
-      "cpu_time": 75,
-      "time_unit": "ns"
-    },
-    {
-      "name": "short",
-      "run_type": "aggregate",
-      "iterations": 762,
-      "real_time": 4.54,
-      "cpu_time": 66.6,
-      "time_unit": "ns"
-    },
-    {
-      "name": "short",
-      "run_type": "iteration",
-      "iterations": 1000,
-      "real_time": 800,
-      "cpu_time": 1,
-      "time_unit": "ns"
-    },
-    {
-      "name": "medium",
-      "run_type": "iteration",
-      "iterations": 1200,
-      "real_time": 5,
-      "cpu_time": 53,
-      "time_unit": "ns"
-    }
-  ]
-}
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/tools/gbench/Inputs/test4_run.json b/gnu/llvm/libcxx/utils/google-benchmark/tools/gbench/Inputs/test4_run.json
deleted file mode 100644
index eaa005f3a9f..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/tools/gbench/Inputs/test4_run.json
+++ /dev/null
@@ -1,96 +0,0 @@
-{
-  "benchmarks": [
-    {
-      "name": "99 family 0 instance 0 repetition 0",
-      "run_type": "iteration",
-      "family_index": 0,
-      "per_family_instance_index": 0,
-      "repetition_index": 0
-    },
-    {
-      "name": "98 family 0 instance 0 repetition 1",
-      "run_type": "iteration",
-      "family_index": 0,
-      "per_family_instance_index": 0,
-      "repetition_index": 1
-    },
-    {
-      "name": "97 family 0 instance 0 aggregate",
-      "run_type": "aggregate",
-      "family_index": 0,
-      "per_family_instance_index": 0,
-      "aggregate_name": "9 aggregate"
-    },
-
-
-    {
-      "name": "96 family 0 instance 1 repetition 0",
-      "run_type": "iteration",
-      "family_index": 0,
-      "per_family_instance_index": 1,
-      "repetition_index": 0
-    },
-    {
-      "name": "95 family 0 instance 1 repetition 1",
-      "run_type": "iteration",
-      "family_index": 0,
-      "per_family_instance_index": 1,
-      "repetition_index": 1
-    },
-    {
-      "name": "94 family 0 instance 1 aggregate",
-      "run_type": "aggregate",
-      "family_index": 0,
-      "per_family_instance_index": 1,
-      "aggregate_name": "9 aggregate"
-    },
-
-
-
-
-    {
-      "name": "93 family 1 instance 0 repetition 0",
-      "run_type": "iteration",
-      "family_index": 1,
-      "per_family_instance_index": 0,
-      "repetition_index": 0
-    },
-    {
-      "name": "92 family 1 instance 0 repetition 1",
-      "run_type": "iteration",
-      "family_index": 1,
-      "per_family_instance_index": 0,
-      "repetition_index": 1
-    },
-    {
-      "name": "91 family 1 instance 0 aggregate",
-      "run_type": "aggregate",
-      "family_index": 1,
-      "per_family_instance_index": 0,
-      "aggregate_name": "9 aggregate"
-    },
-
-
-    {
-      "name": "90 family 1 instance 1 repetition 0",
-      "run_type": "iteration",
-      "family_index": 1,
-      "per_family_instance_index": 1,
-      "repetition_index": 0
-    },
-    {
-      "name": "89 family 1 instance 1 repetition 1",
-      "run_type": "iteration",
-      "family_index": 1,
-      "per_family_instance_index": 1,
-      "repetition_index": 1
-    },
-    {
-      "name": "88 family 1 instance 1 aggregate",
-      "run_type": "aggregate",
-      "family_index": 1,
-      "per_family_instance_index": 1,
-      "aggregate_name": "9 aggregate"
-    }
-  ]
-}
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/tools/gbench/__init__.py b/gnu/llvm/libcxx/utils/google-benchmark/tools/gbench/__init__.py
deleted file mode 100644
index fce1a1acfbb..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/tools/gbench/__init__.py
+++ /dev/null
@@ -1,8 +0,0 @@
-"""Google Benchmark tooling"""
-
-__author__ = 'Eric Fiselier'
-__email__ = 'eric@efcs.ca'
-__versioninfo__ = (0, 5, 0)
-__version__ = '.'.join(str(v) for v in __versioninfo__) + 'dev'
-
-__all__ = []
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/tools/gbench/report.py b/gnu/llvm/libcxx/utils/google-benchmark/tools/gbench/report.py
deleted file mode 100644
index 5085b931947..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/tools/gbench/report.py
+++ /dev/null
@@ -1,522 +0,0 @@
-import unittest
-"""report.py - Utilities for reporting statistics about benchmark results
-"""
-import os
-import re
-import copy
-
-from scipy.stats import mannwhitneyu
-
-
-class BenchmarkColor(object):
-    def __init__(self, name, code):
-        self.name = name
-        self.code = code
-
-    def __repr__(self):
-        return '%s%r' % (self.__class__.__name__,
-                         (self.name, self.code))
-
-    def __format__(self, format):
-        return self.code
-
-
-# Benchmark Colors Enumeration
-BC_NONE = BenchmarkColor('NONE', '')
-BC_MAGENTA = BenchmarkColor('MAGENTA', '\033[95m')
-BC_CYAN = BenchmarkColor('CYAN', '\033[96m')
-BC_OKBLUE = BenchmarkColor('OKBLUE', '\033[94m')
-BC_OKGREEN = BenchmarkColor('OKGREEN', '\033[32m')
-BC_HEADER = BenchmarkColor('HEADER', '\033[92m')
-BC_WARNING = BenchmarkColor('WARNING', '\033[93m')
-BC_WHITE = BenchmarkColor('WHITE', '\033[97m')
-BC_FAIL = BenchmarkColor('FAIL', '\033[91m')
-BC_ENDC = BenchmarkColor('ENDC', '\033[0m')
-BC_BOLD = BenchmarkColor('BOLD', '\033[1m')
-BC_UNDERLINE = BenchmarkColor('UNDERLINE', '\033[4m')
-
-UTEST_MIN_REPETITIONS = 2
-UTEST_OPTIMAL_REPETITIONS = 9  # Lowest reasonable number, More is better.
-UTEST_COL_NAME = "_pvalue"
-
-
-def color_format(use_color, fmt_str, *args, **kwargs):
-    """
-    Return the result of 'fmt_str.format(*args, **kwargs)' after transforming
-    'args' and 'kwargs' according to the value of 'use_color'. If 'use_color'
-    is False then all color codes in 'args' and 'kwargs' are replaced with
-    the empty string.
-    """
-    assert use_color is True or use_color is False
-    if not use_color:
-        args = [arg if not isinstance(arg, BenchmarkColor) else BC_NONE
-                for arg in args]
-        kwargs = {key: arg if not isinstance(arg, BenchmarkColor) else BC_NONE
-                  for key, arg in kwargs.items()}
-    return fmt_str.format(*args, **kwargs)
-
-
-def find_longest_name(benchmark_list):
-    """
-    Return the length of the longest benchmark name in a given list of
-    benchmark JSON objects
-    """
-    longest_name = 1
-    for bc in benchmark_list:
-        if len(bc['name']) > longest_name:
-            longest_name = len(bc['name'])
-    return longest_name
-
-
-def calculate_change(old_val, new_val):
-    """
-    Return a float representing the decimal change between old_val and new_val.
-    """
-    if old_val == 0 and new_val == 0:
-        return 0.0
-    if old_val == 0:
-        return float(new_val - old_val) / (float(old_val + new_val) / 2)
-    return float(new_val - old_val) / abs(old_val)
-
-
-def filter_benchmark(json_orig, family, replacement=""):
-    """
-    Apply a filter to the json, and only leave the 'family' of benchmarks.
-    """
-    regex = re.compile(family)
-    filtered = {}
-    filtered['benchmarks'] = []
-    for be in json_orig['benchmarks']:
-        if not regex.search(be['name']):
-            continue
-        filteredbench = copy.deepcopy(be)  # Do NOT modify the old name!
-        filteredbench['name'] = regex.sub(replacement, filteredbench['name'])
-        filtered['benchmarks'].append(filteredbench)
-    return filtered
-
-
-def get_unique_benchmark_names(json):
-    """
-    While *keeping* the order, give all the unique 'names' used for benchmarks.
-    """
-    seen = set()
-    uniqued = [x['name'] for x in json['benchmarks']
-               if x['name'] not in seen and
-               (seen.add(x['name']) or True)]
-    return uniqued
-
-
-def intersect(list1, list2):
-    """
-    Given two lists, get a new list consisting of the elements only contained
-    in *both of the input lists*, while preserving the ordering.
-    """
-    return [x for x in list1 if x in list2]
-
-
-def partition_benchmarks(json1, json2):
-    """
-    While preserving the ordering, find benchmarks with the same names in
-    both of the inputs, and group them.
-    (i.e. partition/filter into groups with common name)
-    """
-    json1_unique_names = get_unique_benchmark_names(json1)
-    json2_unique_names = get_unique_benchmark_names(json2)
-    names = intersect(json1_unique_names, json2_unique_names)
-    partitions = []
-    for name in names:
-        # Pick the time unit from the first entry of the lhs benchmark.
-        time_unit = (x['time_unit']
-                     for x in json1['benchmarks'] if x['name'] == name).next()
-        # Filter by name and time unit.
-        lhs = [x for x in json1['benchmarks'] if x['name'] == name and
-               x['time_unit'] == time_unit]
-        rhs = [x for x in json2['benchmarks'] if x['name'] == name and
-               x['time_unit'] == time_unit]
-        partitions.append([lhs, rhs])
-    return partitions
-
-
-def extract_field(partition, field_name):
-    # The count of elements may be different. We want *all* of them.
-    lhs = [x[field_name] for x in partition[0]]
-    rhs = [x[field_name] for x in partition[1]]
-    return [lhs, rhs]
-
-
-def print_utest(partition, utest_alpha, first_col_width, use_color=True):
-    timings_time = extract_field(partition, 'real_time')
-    timings_cpu = extract_field(partition, 'cpu_time')
-
-    min_rep_cnt = min(len(timings_time[0]),
-                      len(timings_time[1]),
-                      len(timings_cpu[0]),
-                      len(timings_cpu[1]))
-
-    # Does *everything* has at least UTEST_MIN_REPETITIONS repetitions?
-    if min_rep_cnt < UTEST_MIN_REPETITIONS:
-        return []
-
-    def get_utest_color(pval):
-        return BC_FAIL if pval >= utest_alpha else BC_OKGREEN
-
-    time_pvalue = mannwhitneyu(
-        timings_time[0], timings_time[1], alternative='two-sided').pvalue
-    cpu_pvalue = mannwhitneyu(
-        timings_cpu[0], timings_cpu[1], alternative='two-sided').pvalue
-
-    dsc = "U Test, Repetitions: {} vs {}".format(
-        len(timings_cpu[0]), len(timings_cpu[1]))
-    dsc_color = BC_OKGREEN
-
-    if min_rep_cnt < UTEST_OPTIMAL_REPETITIONS:
-        dsc_color = BC_WARNING
-        dsc += ". WARNING: Results unreliable! {}+ repetitions recommended.".format(
-            UTEST_OPTIMAL_REPETITIONS)
-
-    special_str = "{}{:<{}s}{endc}{}{:16.4f}{endc}{}{:16.4f}{endc}{}      {}"
-
-    last_name = partition[0][0]['name']
-    return [color_format(use_color,
-                         special_str,
-                         BC_HEADER,
-                         "{}{}".format(last_name, UTEST_COL_NAME),
-                         first_col_width,
-                         get_utest_color(time_pvalue), time_pvalue,
-                         get_utest_color(cpu_pvalue), cpu_pvalue,
-                         dsc_color, dsc,
-                         endc=BC_ENDC)]
-
-
-def generate_difference_report(
-        json1,
-        json2,
-        display_aggregates_only=False,
-        utest=False,
-        utest_alpha=0.05,
-        use_color=True):
-    """
-    Calculate and report the difference between each test of two benchmarks
-    runs specified as 'json1' and 'json2'.
-    """
-    assert utest is True or utest is False
-    first_col_width = find_longest_name(json1['benchmarks'])
-
-    def find_test(name):
-        for b in json2['benchmarks']:
-            if b['name'] == name:
-                return b
-        return None
-
-    first_col_width = max(
-        first_col_width,
-        len('Benchmark'))
-    first_col_width += len(UTEST_COL_NAME)
-    first_line = "{:<{}s}Time             CPU      Time Old      Time New       CPU Old       CPU New".format(
-        'Benchmark', 12 + first_col_width)
-    output_strs = [first_line, '-' * len(first_line)]
-
-    partitions = partition_benchmarks(json1, json2)
-    for partition in partitions:
-        # Careful, we may have different repetition count.
-        for i in range(min(len(partition[0]), len(partition[1]))):
-            bn = partition[0][i]
-            other_bench = partition[1][i]
-
-            # *If* we were asked to only display aggregates,
-            # and if it is non-aggregate, then skip it.
-            if display_aggregates_only and 'run_type' in bn and 'run_type' in other_bench:
-                assert bn['run_type'] == other_bench['run_type']
-                if bn['run_type'] != 'aggregate':
-                    continue
-
-            fmt_str = "{}{:<{}s}{endc}{}{:+16.4f}{endc}{}{:+16.4f}{endc}{:14.0f}{:14.0f}{endc}{:14.0f}{:14.0f}"
-
-            def get_color(res):
-                if res > 0.05:
-                    return BC_FAIL
-                elif res > -0.07:
-                    return BC_WHITE
-                else:
-                    return BC_CYAN
-
-            tres = calculate_change(bn['real_time'], other_bench['real_time'])
-            cpures = calculate_change(bn['cpu_time'], other_bench['cpu_time'])
-            output_strs += [color_format(use_color,
-                                         fmt_str,
-                                         BC_HEADER,
-                                         bn['name'],
-                                         first_col_width,
-                                         get_color(tres),
-                                         tres,
-                                         get_color(cpures),
-                                         cpures,
-                                         bn['real_time'],
-                                         other_bench['real_time'],
-                                         bn['cpu_time'],
-                                         other_bench['cpu_time'],
-                                         endc=BC_ENDC)]
-
-        # After processing the whole partition, if requested, do the U test.
-        if utest:
-            output_strs += print_utest(partition,
-                                       utest_alpha=utest_alpha,
-                                       first_col_width=first_col_width,
-                                       use_color=use_color)
-
-    return output_strs
-
-
-###############################################################################
-# Unit tests
-
-
-class TestGetUniqueBenchmarkNames(unittest.TestCase):
-    def load_results(self):
-        import json
-        testInputs = os.path.join(
-            os.path.dirname(
-                os.path.realpath(__file__)),
-            'Inputs')
-        testOutput = os.path.join(testInputs, 'test3_run0.json')
-        with open(testOutput, 'r') as f:
-            json = json.load(f)
-        return json
-
-    def test_basic(self):
-        expect_lines = [
-            'BM_One',
-            'BM_Two',
-            'short',  # These two are not sorted
-            'medium',  # These two are not sorted
-        ]
-        json = self.load_results()
-        output_lines = get_unique_benchmark_names(json)
-        print("\n")
-        print("\n".join(output_lines))
-        self.assertEqual(len(output_lines), len(expect_lines))
-        for i in range(0, len(output_lines)):
-            self.assertEqual(expect_lines[i], output_lines[i])
-
-
-class TestReportDifference(unittest.TestCase):
-    def load_results(self):
-        import json
-        testInputs = os.path.join(
-            os.path.dirname(
-                os.path.realpath(__file__)),
-            'Inputs')
-        testOutput1 = os.path.join(testInputs, 'test1_run1.json')
-        testOutput2 = os.path.join(testInputs, 'test1_run2.json')
-        with open(testOutput1, 'r') as f:
-            json1 = json.load(f)
-        with open(testOutput2, 'r') as f:
-            json2 = json.load(f)
-        return json1, json2
-
-    def test_basic(self):
-        expect_lines = [
-            ['BM_SameTimes', '+0.0000', '+0.0000', '10', '10', '10', '10'],
-            ['BM_2xFaster', '-0.5000', '-0.5000', '50', '25', '50', '25'],
-            ['BM_2xSlower', '+1.0000', '+1.0000', '50', '100', '50', '100'],
-            ['BM_1PercentFaster', '-0.0100', '-0.0100', '100', '99', '100', '99'],
-            ['BM_1PercentSlower', '+0.0100', '+0.0100', '100', '101', '100', '101'],
-            ['BM_10PercentFaster', '-0.1000', '-0.1000', '100', '90', '100', '90'],
-            ['BM_10PercentSlower', '+0.1000', '+0.1000', '100', '110', '100', '110'],
-            ['BM_100xSlower', '+99.0000', '+99.0000',
-                '100', '10000', '100', '10000'],
-            ['BM_100xFaster', '-0.9900', '-0.9900',
-                '10000', '100', '10000', '100'],
-            ['BM_10PercentCPUToTime', '+0.1000',
-                '-0.1000', '100', '110', '100', '90'],
-            ['BM_ThirdFaster', '-0.3333', '-0.3334', '100', '67', '100', '67'],
-            ['BM_BadTimeUnit', '-0.9000', '+0.2000', '0', '0', '0', '1'],
-        ]
-        json1, json2 = self.load_results()
-        output_lines_with_header = generate_difference_report(
-            json1, json2, use_color=False)
-        output_lines = output_lines_with_header[2:]
-        print("\n")
-        print("\n".join(output_lines_with_header))
-        self.assertEqual(len(output_lines), len(expect_lines))
-        for i in range(0, len(output_lines)):
-            parts = [x for x in output_lines[i].split(' ') if x]
-            self.assertEqual(len(parts), 7)
-            self.assertEqual(expect_lines[i], parts)
-
-
-class TestReportDifferenceBetweenFamilies(unittest.TestCase):
-    def load_result(self):
-        import json
-        testInputs = os.path.join(
-            os.path.dirname(
-                os.path.realpath(__file__)),
-            'Inputs')
-        testOutput = os.path.join(testInputs, 'test2_run.json')
-        with open(testOutput, 'r') as f:
-            json = json.load(f)
-        return json
-
-    def test_basic(self):
-        expect_lines = [
-            ['.', '-0.5000', '-0.5000', '10', '5', '10', '5'],
-            ['./4', '-0.5000', '-0.5000', '40', '20', '40', '20'],
-            ['Prefix/.', '-0.5000', '-0.5000', '20', '10', '20', '10'],
-            ['Prefix/./3', '-0.5000', '-0.5000', '30', '15', '30', '15'],
-        ]
-        json = self.load_result()
-        json1 = filter_benchmark(json, "BM_Z.ro", ".")
-        json2 = filter_benchmark(json, "BM_O.e", ".")
-        output_lines_with_header = generate_difference_report(
-            json1, json2, use_color=False)
-        output_lines = output_lines_with_header[2:]
-        print("\n")
-        print("\n".join(output_lines_with_header))
-        self.assertEqual(len(output_lines), len(expect_lines))
-        for i in range(0, len(output_lines)):
-            parts = [x for x in output_lines[i].split(' ') if x]
-            self.assertEqual(len(parts), 7)
-            self.assertEqual(expect_lines[i], parts)
-
-
-class TestReportDifferenceWithUTest(unittest.TestCase):
-    def load_results(self):
-        import json
-        testInputs = os.path.join(
-            os.path.dirname(
-                os.path.realpath(__file__)),
-            'Inputs')
-        testOutput1 = os.path.join(testInputs, 'test3_run0.json')
-        testOutput2 = os.path.join(testInputs, 'test3_run1.json')
-        with open(testOutput1, 'r') as f:
-            json1 = json.load(f)
-        with open(testOutput2, 'r') as f:
-            json2 = json.load(f)
-        return json1, json2
-
-    def test_utest(self):
-        expect_lines = []
-        expect_lines = [
-            ['BM_One', '-0.1000', '+0.1000', '10', '9', '100', '110'],
-            ['BM_Two', '+0.1111', '-0.0111', '9', '10', '90', '89'],
-            ['BM_Two', '-0.1250', '-0.1628', '8', '7', '86', '72'],
-            ['BM_Two_pvalue',
-             '0.6985',
-             '0.6985',
-             'U',
-             'Test,',
-             'Repetitions:',
-             '2',
-             'vs',
-             '2.',
-             'WARNING:',
-             'Results',
-             'unreliable!',
-             '9+',
-             'repetitions',
-             'recommended.'],
-            ['short', '-0.1250', '-0.0625', '8', '7', '80', '75'],
-            ['short', '-0.4325', '-0.1351', '8', '5', '77', '67'],
-            ['short_pvalue',
-             '0.7671',
-             '0.1489',
-             'U',
-             'Test,',
-             'Repetitions:',
-             '2',
-             'vs',
-             '3.',
-             'WARNING:',
-             'Results',
-             'unreliable!',
-             '9+',
-             'repetitions',
-             'recommended.'],
-            ['medium', '-0.3750', '-0.3375', '8', '5', '80', '53'],
-        ]
-        json1, json2 = self.load_results()
-        output_lines_with_header = generate_difference_report(
-            json1, json2, utest=True, utest_alpha=0.05, use_color=False)
-        output_lines = output_lines_with_header[2:]
-        print("\n")
-        print("\n".join(output_lines_with_header))
-        self.assertEqual(len(output_lines), len(expect_lines))
-        for i in range(0, len(output_lines)):
-            parts = [x for x in output_lines[i].split(' ') if x]
-            self.assertEqual(expect_lines[i], parts)
-
-
-class TestReportDifferenceWithUTestWhileDisplayingAggregatesOnly(
-        unittest.TestCase):
-    def load_results(self):
-        import json
-        testInputs = os.path.join(
-            os.path.dirname(
-                os.path.realpath(__file__)),
-            'Inputs')
-        testOutput1 = os.path.join(testInputs, 'test3_run0.json')
-        testOutput2 = os.path.join(testInputs, 'test3_run1.json')
-        with open(testOutput1, 'r') as f:
-            json1 = json.load(f)
-        with open(testOutput2, 'r') as f:
-            json2 = json.load(f)
-        return json1, json2
-
-    def test_utest(self):
-        expect_lines = []
-        expect_lines = [
-            ['BM_One', '-0.1000', '+0.1000', '10', '9', '100', '110'],
-            ['BM_Two', '+0.1111', '-0.0111', '9', '10', '90', '89'],
-            ['BM_Two', '-0.1250', '-0.1628', '8', '7', '86', '72'],
-            ['BM_Two_pvalue',
-             '0.6985',
-             '0.6985',
-             'U',
-             'Test,',
-             'Repetitions:',
-             '2',
-             'vs',
-             '2.',
-             'WARNING:',
-             'Results',
-             'unreliable!',
-             '9+',
-             'repetitions',
-             'recommended.'],
-            ['short', '-0.1250', '-0.0625', '8', '7', '80', '75'],
-            ['short', '-0.4325', '-0.1351', '8', '5', '77', '67'],
-            ['short_pvalue',
-             '0.7671',
-             '0.1489',
-             'U',
-             'Test,',
-             'Repetitions:',
-             '2',
-             'vs',
-             '3.',
-             'WARNING:',
-             'Results',
-             'unreliable!',
-             '9+',
-             'repetitions',
-             'recommended.'],
-        ]
-        json1, json2 = self.load_results()
-        output_lines_with_header = generate_difference_report(
-            json1, json2, display_aggregates_only=True,
-            utest=True, utest_alpha=0.05, use_color=False)
-        output_lines = output_lines_with_header[2:]
-        print("\n")
-        print("\n".join(output_lines_with_header))
-        self.assertEqual(len(output_lines), len(expect_lines))
-        for i in range(0, len(output_lines)):
-            parts = [x for x in output_lines[i].split(' ') if x]
-            self.assertEqual(expect_lines[i], parts)
-
-
-if __name__ == '__main__':
-    unittest.main()
-
-# vim: tabstop=4 expandtab shiftwidth=4 softtabstop=4
-# kate: tab-width: 4; replace-tabs on; indent-width 4; tab-indents: off;
-# kate: indent-mode python; remove-trailing-spaces modified;
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/tools/gbench/util.py b/gnu/llvm/libcxx/utils/google-benchmark/tools/gbench/util.py
deleted file mode 100644
index 1f8e8e2c479..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/tools/gbench/util.py
+++ /dev/null
@@ -1,164 +0,0 @@
-"""util.py - General utilities for running, loading, and processing benchmarks
-"""
-import json
-import os
-import tempfile
-import subprocess
-import sys
-
-# Input file type enumeration
-IT_Invalid = 0
-IT_JSON = 1
-IT_Executable = 2
-
-_num_magic_bytes = 2 if sys.platform.startswith('win') else 4
-
-
-def is_executable_file(filename):
-    """
-    Return 'True' if 'filename' names a valid file which is likely
-    an executable. A file is considered an executable if it starts with the
-    magic bytes for a EXE, Mach O, or ELF file.
-    """
-    if not os.path.isfile(filename):
-        return False
-    with open(filename, mode='rb') as f:
-        magic_bytes = f.read(_num_magic_bytes)
-    if sys.platform == 'darwin':
-        return magic_bytes in [
-            b'\xfe\xed\xfa\xce',  # MH_MAGIC
-            b'\xce\xfa\xed\xfe',  # MH_CIGAM
-            b'\xfe\xed\xfa\xcf',  # MH_MAGIC_64
-            b'\xcf\xfa\xed\xfe',  # MH_CIGAM_64
-            b'\xca\xfe\xba\xbe',  # FAT_MAGIC
-            b'\xbe\xba\xfe\xca'   # FAT_CIGAM
-        ]
-    elif sys.platform.startswith('win'):
-        return magic_bytes == b'MZ'
-    else:
-        return magic_bytes == b'\x7FELF'
-
-
-def is_json_file(filename):
-    """
-    Returns 'True' if 'filename' names a valid JSON output file.
-    'False' otherwise.
-    """
-    try:
-        with open(filename, 'r') as f:
-            json.load(f)
-        return True
-    except BaseException:
-        pass
-    return False
-
-
-def classify_input_file(filename):
-    """
-    Return a tuple (type, msg) where 'type' specifies the classified type
-    of 'filename'. If 'type' is 'IT_Invalid' then 'msg' is a human readable
-    string represeting the error.
-    """
-    ftype = IT_Invalid
-    err_msg = None
-    if not os.path.exists(filename):
-        err_msg = "'%s' does not exist" % filename
-    elif not os.path.isfile(filename):
-        err_msg = "'%s' does not name a file" % filename
-    elif is_executable_file(filename):
-        ftype = IT_Executable
-    elif is_json_file(filename):
-        ftype = IT_JSON
-    else:
-        err_msg = "'%s' does not name a valid benchmark executable or JSON file" % filename
-    return ftype, err_msg
-
-
-def check_input_file(filename):
-    """
-    Classify the file named by 'filename' and return the classification.
-    If the file is classified as 'IT_Invalid' print an error message and exit
-    the program.
-    """
-    ftype, msg = classify_input_file(filename)
-    if ftype == IT_Invalid:
-        print("Invalid input file: %s" % msg)
-        sys.exit(1)
-    return ftype
-
-
-def find_benchmark_flag(prefix, benchmark_flags):
-    """
-    Search the specified list of flags for a flag matching `<prefix><arg>` and
-    if it is found return the arg it specifies. If specified more than once the
-    last value is returned. If the flag is not found None is returned.
-    """
-    assert prefix.startswith('--') and prefix.endswith('=')
-    result = None
-    for f in benchmark_flags:
-        if f.startswith(prefix):
-            result = f[len(prefix):]
-    return result
-
-
-def remove_benchmark_flags(prefix, benchmark_flags):
-    """
-    Return a new list containing the specified benchmark_flags except those
-    with the specified prefix.
-    """
-    assert prefix.startswith('--') and prefix.endswith('=')
-    return [f for f in benchmark_flags if not f.startswith(prefix)]
-
-
-def load_benchmark_results(fname):
-    """
-    Read benchmark output from a file and return the JSON object.
-    REQUIRES: 'fname' names a file containing JSON benchmark output.
-    """
-    with open(fname, 'r') as f:
-        return json.load(f)
-
-
-def run_benchmark(exe_name, benchmark_flags):
-    """
-    Run a benchmark specified by 'exe_name' with the specified
-    'benchmark_flags'. The benchmark is run directly as a subprocess to preserve
-    real time console output.
-    RETURNS: A JSON object representing the benchmark output
-    """
-    output_name = find_benchmark_flag('--benchmark_out=',
-                                      benchmark_flags)
-    is_temp_output = False
-    if output_name is None:
-        is_temp_output = True
-        thandle, output_name = tempfile.mkstemp()
-        os.close(thandle)
-        benchmark_flags = list(benchmark_flags) + \
-            ['--benchmark_out=%s' % output_name]
-
-    cmd = [exe_name] + benchmark_flags
-    print("RUNNING: %s" % ' '.join(cmd))
-    exitCode = subprocess.call(cmd)
-    if exitCode != 0:
-        print('TEST FAILED...')
-        sys.exit(exitCode)
-    json_res = load_benchmark_results(output_name)
-    if is_temp_output:
-        os.unlink(output_name)
-    return json_res
-
-
-def run_or_load_benchmark(filename, benchmark_flags):
-    """
-    Get the results for a specified benchmark. If 'filename' specifies
-    an executable benchmark then the results are generated by running the
-    benchmark. Otherwise 'filename' must name a valid JSON output file,
-    which is loaded and the result returned.
-    """
-    ftype = check_input_file(filename)
-    if ftype == IT_JSON:
-        return load_benchmark_results(filename)
-    elif ftype == IT_Executable:
-        return run_benchmark(filename, benchmark_flags)
-    else:
-        assert False  # This branch is unreachable
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/tools/requirements.txt b/gnu/llvm/libcxx/utils/google-benchmark/tools/requirements.txt
deleted file mode 100644
index 3b3331b5af1..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/tools/requirements.txt
+++ /dev/null
@@ -1 +0,0 @@
-scipy>=1.5.0
\ No newline at end of file
diff --git a/gnu/llvm/libcxx/utils/google-benchmark/tools/strip_asm.py b/gnu/llvm/libcxx/utils/google-benchmark/tools/strip_asm.py
deleted file mode 100755
index 9030550b43b..00000000000
--- a/gnu/llvm/libcxx/utils/google-benchmark/tools/strip_asm.py
+++ /dev/null
@@ -1,151 +0,0 @@
-#!/usr/bin/env python
-
-"""
-strip_asm.py - Cleanup ASM output for the specified file
-"""
-
-from argparse import ArgumentParser
-import sys
-import os
-import re
-
-def find_used_labels(asm):
-    found = set()
-    label_re = re.compile("\s*j[a-z]+\s+\.L([a-zA-Z0-9][a-zA-Z0-9_]*)")
-    for l in asm.splitlines():
-        m = label_re.match(l)
-        if m:
-            found.add('.L%s' % m.group(1))
-    return found
-
-
-def normalize_labels(asm):
-    decls = set()
-    label_decl = re.compile("^[.]{0,1}L([a-zA-Z0-9][a-zA-Z0-9_]*)(?=:)")
-    for l in asm.splitlines():
-        m = label_decl.match(l)
-        if m:
-            decls.add(m.group(0))
-    if len(decls) == 0:
-        return asm
-    needs_dot = next(iter(decls))[0] != '.'
-    if not needs_dot:
-        return asm
-    for ld in decls:
-        asm = re.sub("(^|\s+)" + ld + "(?=:|\s)", '\\1.' + ld, asm)
-    return asm
-
-
-def transform_labels(asm):
-    asm = normalize_labels(asm)
-    used_decls = find_used_labels(asm)
-    new_asm = ''
-    label_decl = re.compile("^\.L([a-zA-Z0-9][a-zA-Z0-9_]*)(?=:)")
-    for l in asm.splitlines():
-        m = label_decl.match(l)
-        if not m or m.group(0) in used_decls:
-            new_asm += l
-            new_asm += '\n'
-    return new_asm
-
-
-def is_identifier(tk):
-    if len(tk) == 0:
-        return False
-    first = tk[0]
-    if not first.isalpha() and first != '_':
-        return False
-    for i in range(1, len(tk)):
-        c = tk[i]
-        if not c.isalnum() and c != '_':
-            return False
-    return True
-
-def process_identifiers(l):
-    """
-    process_identifiers - process all identifiers and modify them to have
-    consistent names across all platforms; specifically across ELF and MachO.
-    For example, MachO inserts an additional understore at the beginning of
-    names. This function removes that.
-    """
-    parts = re.split(r'([a-zA-Z0-9_]+)', l)
-    new_line = ''
-    for tk in parts:
-        if is_identifier(tk):
-            if tk.startswith('__Z'):
-                tk = tk[1:]
-            elif tk.startswith('_') and len(tk) > 1 and \
-                    tk[1].isalpha() and tk[1] != 'Z':
-                tk = tk[1:]
-        new_line += tk
-    return new_line
-
-
-def process_asm(asm):
-    """
-    Strip the ASM of unwanted directives and lines
-    """
-    new_contents = ''
-    asm = transform_labels(asm)
-
-    # TODO: Add more things we want to remove
-    discard_regexes = [
-        re.compile("\s+\..*$"), # directive
-        re.compile("\s*#(NO_APP|APP)$"), #inline ASM
-        re.compile("\s*#.*$"), # comment line
-        re.compile("\s*\.globa?l\s*([.a-zA-Z_][a-zA-Z0-9$_.]*)"), #global directive
-        re.compile("\s*\.(string|asciz|ascii|[1248]?byte|short|word|long|quad|value|zero)"),
-    ]
-    keep_regexes = [
-
-    ]
-    fn_label_def = re.compile("^[a-zA-Z_][a-zA-Z0-9_.]*:")
-    for l in asm.splitlines():
-        # Remove Mach-O attribute
-        l = l.replace('@GOTPCREL', '')
-        add_line = True
-        for reg in discard_regexes:
-            if reg.match(l) is not None:
-                add_line = False
-                break
-        for reg in keep_regexes:
-            if reg.match(l) is not None:
-                add_line = True
-                break
-        if add_line:
-            if fn_label_def.match(l) and len(new_contents) != 0:
-                new_contents += '\n'
-            l = process_identifiers(l)
-            new_contents += l
-            new_contents += '\n'
-    return new_contents
-
-def main():
-    parser = ArgumentParser(
-        description='generate a stripped assembly file')
-    parser.add_argument(
-        'input', metavar='input', type=str, nargs=1,
-        help='An input assembly file')
-    parser.add_argument(
-        'out', metavar='output', type=str, nargs=1,
-        help='The output file')
-    args, unknown_args = parser.parse_known_args()
-    input = args.input[0]
-    output = args.out[0]
-    if not os.path.isfile(input):
-        print(("ERROR: input file '%s' does not exist") % input)
-        sys.exit(1)
-    contents = None
-    with open(input, 'r') as f:
-        contents = f.read()
-    new_contents = process_asm(contents)
-    with open(output, 'w') as f:
-        f.write(new_contents)
-
-
-if __name__ == '__main__':
-    main()
-
-# vim: tabstop=4 expandtab shiftwidth=4 softtabstop=4
-# kate: tab-width: 4; replace-tabs on; indent-width 4; tab-indents: off;
-# kate: indent-mode python; remove-trailing-spaces modified;
diff --git a/gnu/llvm/libcxx/utils/libcxx/compiler.py b/gnu/llvm/libcxx/utils/libcxx/compiler.py
deleted file mode 100644
index dd334cdbcff..00000000000
--- a/gnu/llvm/libcxx/utils/libcxx/compiler.py
+++ /dev/null
@@ -1,308 +0,0 @@
-#===----------------------------------------------------------------------===##
-#
-# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-# See https://llvm.org/LICENSE.txt for license information.
-# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-#
-#===----------------------------------------------------------------------===##
-
-import platform
-import os
-import libcxx.util
-
-
-class CXXCompiler(object):
-    CM_Default = 0
-    CM_PreProcess = 1
-    CM_Compile = 2
-    CM_Link = 3
-
-    def __init__(self, config, path, flags=None, compile_flags=None, link_flags=None,
-                 warning_flags=None, verify_supported=None,
-                 verify_flags=None, use_verify=False,
-                 modules_flags=None, use_modules=False,
-                 use_ccache=False, use_warnings=False, compile_env=None,
-                 cxx_type=None, cxx_version=None):
-        self.libcxx_config = config
-        self.source_lang = 'c++'
-        self.path = path
-        self.flags = list(flags or [])
-        self.compile_flags = list(compile_flags or [])
-        self.link_flags = list(link_flags or [])
-        self.warning_flags = list(warning_flags or [])
-        self.verify_supported = verify_supported
-        self.use_verify = use_verify
-        self.verify_flags = list(verify_flags or [])
-        assert not use_verify or verify_supported
-        assert not use_verify or verify_flags is not None
-        self.modules_flags = list(modules_flags or [])
-        self.use_modules = use_modules
-        assert not use_modules or modules_flags is not None
-        self.use_ccache = use_ccache
-        self.use_warnings = use_warnings
-        if compile_env is not None:
-            self.compile_env = dict(compile_env)
-        else:
-            self.compile_env = None
-        self.type = cxx_type
-        self.version = cxx_version
-        if self.type is None or self.version is None:
-            self._initTypeAndVersion()
-
-    def isVerifySupported(self):
-        if self.verify_supported is None:
-            self.verify_supported = self.hasCompileFlag(['-Xclang',
-                                        '-verify-ignore-unexpected'])
-            if self.verify_supported:
-                self.verify_flags = [
-                    '-Xclang', '-verify',
-                    '-Xclang', '-verify-ignore-unexpected=note',
-                    '-ferror-limit=1024'
-                ]
-        return self.verify_supported
-
-    def useVerify(self, value=True):
-        self.use_verify = value
-        assert not self.use_verify or self.verify_flags is not None
-
-    def useModules(self, value=True):
-        self.use_modules = value
-        assert not self.use_modules or self.modules_flags is not None
-
-    def useCCache(self, value=True):
-        self.use_ccache = value
-
-    def useWarnings(self, value=True):
-        self.use_warnings = value
-
-    def _initTypeAndVersion(self):
-        # Get compiler type and version
-        macros = self.dumpMacros()
-        if macros is None:
-            return
-        compiler_type = None
-        major_ver = minor_ver = patchlevel = None
-        if '__clang__' in macros.keys():
-            compiler_type = 'clang'
-            # Treat apple's llvm fork differently.
-            if '__apple_build_version__' in macros.keys():
-                compiler_type = 'apple-clang'
-            major_ver = macros['__clang_major__']
-            minor_ver = macros['__clang_minor__']
-            patchlevel = macros['__clang_patchlevel__']
-        elif '__GNUC__' in macros.keys():
-            compiler_type = 'gcc'
-            major_ver = macros['__GNUC__']
-            minor_ver = macros['__GNUC_MINOR__']
-            patchlevel = macros['__GNUC_PATCHLEVEL__']
-        self.type = compiler_type
-        self.version = (major_ver, minor_ver, patchlevel)
-
-    def _basicCmd(self, source_files, out, mode=CM_Default, flags=[],
-                  input_is_cxx=False):
-        cmd = []
-        if self.use_ccache \
-                and not mode == self.CM_Link \
-                and not mode == self.CM_PreProcess:
-            cmd += ['ccache']
-        cmd += [self.path]
-        if out is not None:
-            cmd += ['-o', out]
-        if input_is_cxx:
-            cmd += ['-x', self.source_lang]
-        if isinstance(source_files, list):
-            cmd += source_files
-        elif isinstance(source_files, str):
-            cmd += [source_files]
-        else:
-            raise TypeError('source_files must be a string or list')
-        if mode == self.CM_PreProcess:
-            cmd += ['-E']
-        elif mode == self.CM_Compile:
-            cmd += ['-c']
-        cmd += self.flags
-        if self.use_verify:
-            cmd += self.verify_flags
-            assert mode in [self.CM_Default, self.CM_Compile]
-        if self.use_modules:
-            cmd += self.modules_flags
-        if mode != self.CM_Link:
-            cmd += self.compile_flags
-            if self.use_warnings:
-                cmd += self.warning_flags
-        if mode != self.CM_PreProcess and mode != self.CM_Compile:
-            cmd += self.link_flags
-        cmd += flags
-        return cmd
-
-    def preprocessCmd(self, source_files, out=None, flags=[]):
-        return self._basicCmd(source_files, out, flags=flags,
-                             mode=self.CM_PreProcess,
-                             input_is_cxx=True)
-
-    def compileCmd(self, source_files, out=None, flags=[]):
-        return self._basicCmd(source_files, out, flags=flags,
-                             mode=self.CM_Compile,
-                             input_is_cxx=True) + ['-c']
-
-    def linkCmd(self, source_files, out=None, flags=[]):
-        return self._basicCmd(source_files, out, flags=flags,
-                              mode=self.CM_Link)
-
-    def compileLinkCmd(self, source_files, out=None, flags=[]):
-        return self._basicCmd(source_files, out, flags=flags)
-
-    def preprocess(self, source_files, out=None, flags=[], cwd=None):
-        cmd = self.preprocessCmd(source_files, out, flags)
-        out, err, rc = libcxx.util.executeCommand(cmd, env=self.compile_env,
-                                                  cwd=cwd)
-        return cmd, out, err, rc
-
-    def compile(self, source_files, out=None, flags=[], cwd=None):
-        cmd = self.compileCmd(source_files, out, flags)
-        out, err, rc = libcxx.util.executeCommand(cmd, env=self.compile_env,
-                                                  cwd=cwd)
-        return cmd, out, err, rc
-
-    def link(self, source_files, exec_path=None, flags=[], cwd=None):
-        cmd = self.linkCmd(source_files, exec_path, flags)
-        out, err, rc = libcxx.util.executeCommand(cmd, env=self.compile_env,
-                                                  cwd=cwd)
-        cs_cmd, cs_out, cs_err, cs_rc = self.codesign(exec_path, cwd)
-        if cs_rc != 0:
-            return cs_cmd, cs_out, cs_err, cs_rc
-        return cmd, out, err, rc
-
-    def compileLink(self, source_files, exec_path=None, flags=[],
-                    cwd=None):
-        cmd = self.compileLinkCmd(source_files, exec_path, flags)
-        out, err, rc = libcxx.util.executeCommand(cmd, env=self.compile_env,
-                                                  cwd=cwd)
-        cs_cmd, cs_out, cs_err, cs_rc = self.codesign(exec_path, cwd)
-        if cs_rc != 0:
-            return cs_cmd, cs_out, cs_err, cs_rc
-        return cmd, out, err, rc
-
-    def codesign(self, exec_path, cwd=None):
-        null_op = [], '', '', 0
-        if not exec_path:
-            return null_op
-        codesign_ident = self.libcxx_config.get_lit_conf('llvm_codesign_identity', '')
-        if not codesign_ident:
-            return null_op
-        cmd = ['xcrun', 'codesign', '-s', codesign_ident, exec_path]
-        out, err, rc = libcxx.util.executeCommand(cmd, cwd=cwd)
-        return cmd, out, err, rc
-
-    def compileLinkTwoSteps(self, source_file, out=None, object_file=None,
-                            flags=[], cwd=None):
-        if not isinstance(source_file, str):
-            raise TypeError('This function only accepts a single input file')
-        if object_file is None:
-            # Create, use and delete a temporary object file if none is given.
-            with_fn = lambda: libcxx.util.guardedTempFilename(suffix='.o')
-        else:
-            # Otherwise wrap the filename in a context manager function.
-            with_fn = lambda: libcxx.util.nullContext(object_file)
-        with with_fn() as object_file:
-            cc_cmd, cc_stdout, cc_stderr, rc = self.compile(
-                source_file, object_file, flags=flags, cwd=cwd)
-            if rc != 0:
-                return cc_cmd, cc_stdout, cc_stderr, rc
-
-            link_cmd, link_stdout, link_stderr, rc = self.link(
-                object_file, exec_path=out, flags=flags, cwd=cwd)
-            return (cc_cmd + ['&&'] + link_cmd, cc_stdout + link_stdout,
-                    cc_stderr + link_stderr, rc)
-
-    def dumpMacros(self, source_files=None, flags=[], cwd=None):
-        if source_files is None:
-            source_files = os.devnull
-        flags = ['-dM'] + flags
-        cmd, out, err, rc = self.preprocess(source_files, flags=flags, cwd=cwd)
-        if rc != 0:
-            return cmd, out, err, rc
-        parsed_macros = {}
-        lines = [l.strip() for l in out.split('\n') if l.strip()]
-        for l in lines:
-            assert l.startswith('#define ')
-            l = l[len('#define '):]
-            macro, _, value = l.partition(' ')
-            parsed_macros[macro] = value
-        return parsed_macros
-
-    def getTriple(self):
-        cmd = [self.path] + self.flags + ['-dumpmachine']
-        return libcxx.util.capture(cmd).strip()
-
-    def hasCompileFlag(self, flag):
-        if isinstance(flag, list):
-            flags = list(flag)
-        else:
-            flags = [flag]
-        # Add -Werror to ensure that an unrecognized flag causes a non-zero
-        # exit code. -Werror is supported on all known compiler types.
-        if self.type is not None:
-            flags += ['-Werror', '-fsyntax-only']
-        cmd, out, err, rc = self.compile(os.devnull, out=os.devnull,
-                                         flags=flags)
-        return rc == 0
-
-    def addFlagIfSupported(self, flag):
-        if isinstance(flag, list):
-            flags = list(flag)
-        else:
-            flags = [flag]
-        if self.hasCompileFlag(flags):
-            self.flags += flags
-            return True
-        else:
-            return False
-
-    def addCompileFlagIfSupported(self, flag):
-        if isinstance(flag, list):
-            flags = list(flag)
-        else:
-            flags = [flag]
-        if self.hasCompileFlag(flags):
-            self.compile_flags += flags
-            return True
-        else:
-            return False
-
-    def hasWarningFlag(self, flag):
-        """
-        hasWarningFlag - Test if the compiler supports a given warning flag.
-        Unlike addCompileFlagIfSupported, this function detects when
-        "-Wno-<warning>" flags are unsupported. If flag is a
-        "-Wno-<warning>" GCC will not emit an unknown option diagnostic unless
-        another error is triggered during compilation.
-        """
-        assert isinstance(flag, str)
-        assert flag.startswith('-W')
-        if not flag.startswith('-Wno-'):
-            return self.hasCompileFlag(flag)
-        flags = ['-Werror', flag]
-        old_use_warnings = self.use_warnings
-        self.useWarnings(False)
-        cmd = self.compileCmd('-', os.devnull, flags)
-        self.useWarnings(old_use_warnings)
-        # Remove '-v' because it will cause the command line invocation
-        # to be printed as part of the error output.
-        # TODO(EricWF): Are there other flags we need to worry about?
-        if '-v' in cmd:
-            cmd.remove('-v')
-        out, err, rc = libcxx.util.executeCommand(
-            cmd, input=libcxx.util.to_bytes('#error\n'))
-
-        assert rc != 0
-        if flag in err:
-            return False
-        return True
-
-    def addWarningFlagIfSupported(self, flag):
-        if self.hasWarningFlag(flag):
-            if flag not in self.warning_flags:
-                self.warning_flags += [flag]
-            return True
-        return False
diff --git a/gnu/llvm/libcxx/utils/libcxx/test/config.py b/gnu/llvm/libcxx/utils/libcxx/test/config.py
deleted file mode 100644
index 3c9b3cd6f55..00000000000
--- a/gnu/llvm/libcxx/utils/libcxx/test/config.py
+++ /dev/null
@@ -1,1208 +0,0 @@
-#===----------------------------------------------------------------------===##
-#
-# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-# See https://llvm.org/LICENSE.txt for license information.
-# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-#
-#===----------------------------------------------------------------------===##
-
-import locale
-import os
-import platform
-import pkgutil
-import pipes
-import re
-import shlex
-import shutil
-import sys
-
-from libcxx.compiler import CXXCompiler
-from libcxx.test.target_info import make_target_info
-from libcxx.test.executor import *
-from libcxx.test.tracing import *
-import libcxx.util
-
-def loadSiteConfig(lit_config, config, param_name, env_name):
-    # We haven't loaded the site specific configuration (the user is
-    # probably trying to run on a test file directly, and either the site
-    # configuration hasn't been created by the build system, or we are in an
-    # out-of-tree build situation).
-    site_cfg = lit_config.params.get(param_name,
-                                     os.environ.get(env_name))
-    if not site_cfg:
-        lit_config.warning('No site specific configuration file found!'
-                           ' Running the tests in the default configuration.')
-    elif not os.path.isfile(site_cfg):
-        lit_config.fatal(
-            "Specified site configuration file does not exist: '%s'" %
-            site_cfg)
-    else:
-        lit_config.note('using site specific configuration at %s' % site_cfg)
-        ld_fn = lit_config.load_config
-
-        # Null out the load_config function so that lit.site.cfg doesn't
-        # recursively load a config even if it tries.
-        # TODO: This is one hell of a hack. Fix it.
-        def prevent_reload_fn(*args, **kwargs):
-            pass
-        lit_config.load_config = prevent_reload_fn
-        ld_fn(config, site_cfg)
-        lit_config.load_config = ld_fn
-
-# Extract the value of a numeric macro such as __cplusplus or a feature-test
-# macro.
-def intMacroValue(token):
-    return int(token.rstrip('LlUu'))
-
-class Configuration(object):
-    # pylint: disable=redefined-outer-name
-    def __init__(self, lit_config, config):
-        self.lit_config = lit_config
-        self.config = config
-        self.cxx = None
-        self.cxx_is_clang_cl = None
-        self.cxx_stdlib_under_test = None
-        self.project_obj_root = None
-        self.libcxx_src_root = None
-        self.libcxx_obj_root = None
-        self.cxx_library_root = None
-        self.cxx_runtime_root = None
-        self.abi_library_root = None
-        self.link_shared = self.get_lit_bool('enable_shared', default=True)
-        self.debug_build = self.get_lit_bool('debug_build',   default=False)
-        self.exec_env = dict()
-        self.use_target = False
-        self.use_system_cxx_lib = False
-        self.use_clang_verify = False
-        self.long_tests = None
-        self.execute_external = False
-
-    def get_lit_conf(self, name, default=None):
-        val = self.lit_config.params.get(name, None)
-        if val is None:
-            val = getattr(self.config, name, None)
-            if val is None:
-                val = default
-        return val
-
-    def get_lit_bool(self, name, default=None, env_var=None):
-        def check_value(value, var_name):
-            if value is None:
-                return default
-            if isinstance(value, bool):
-                return value
-            if not isinstance(value, str):
-                raise TypeError('expected bool or string')
-            if value.lower() in ('1', 'true'):
-                return True
-            if value.lower() in ('', '0', 'false'):
-                return False
-            self.lit_config.fatal(
-                "parameter '{}' should be true or false".format(var_name))
-
-        conf_val = self.get_lit_conf(name)
-        if env_var is not None and env_var in os.environ and \
-                os.environ[env_var] is not None:
-            val = os.environ[env_var]
-            if conf_val is not None:
-                self.lit_config.warning(
-                    'Environment variable %s=%s is overriding explicit '
-                    '--param=%s=%s' % (env_var, val, name, conf_val))
-            return check_value(val, env_var)
-        return check_value(conf_val, name)
-
-    def get_modules_enabled(self):
-        return self.get_lit_bool('enable_modules',
-                                default=False,
-                                env_var='LIBCXX_ENABLE_MODULES')
-
-    def make_static_lib_name(self, name):
-        """Return the full filename for the specified library name"""
-        if self.target_info.is_windows():
-            assert name == 'c++'  # Only allow libc++ to use this function for now.
-            return 'lib' + name + '.lib'
-        else:
-            return 'lib' + name + '.a'
-
-    def configure(self):
-        self.configure_target_info()
-        self.configure_executor()
-        self.configure_use_system_cxx_lib()
-        self.configure_cxx()
-        self.configure_triple()
-        self.configure_deployment()
-        self.configure_src_root()
-        self.configure_obj_root()
-        self.configure_cxx_stdlib_under_test()
-        self.configure_cxx_library_root()
-        self.configure_use_clang_verify()
-        self.configure_use_thread_safety()
-        self.configure_execute_external()
-        self.configure_ccache()
-        self.configure_compile_flags()
-        self.configure_filesystem_compile_flags()
-        self.configure_link_flags()
-        self.configure_env()
-        self.configure_color_diagnostics()
-        self.configure_debug_mode()
-        self.configure_warnings()
-        self.configure_sanitizer()
-        self.configure_coverage()
-        self.configure_modules()
-        self.configure_coroutines()
-        self.configure_substitutions()
-        self.configure_features()
-
-    def print_config_info(self):
-        # Print the final compile and link flags.
-        self.lit_config.note('Using compiler: %s' % self.cxx.path)
-        self.lit_config.note('Using flags: %s' % self.cxx.flags)
-        if self.cxx.use_modules:
-            self.lit_config.note('Using modules flags: %s' %
-                                 self.cxx.modules_flags)
-        self.lit_config.note('Using compile flags: %s'
-                             % self.cxx.compile_flags)
-        if len(self.cxx.warning_flags):
-            self.lit_config.note('Using warnings: %s' % self.cxx.warning_flags)
-        self.lit_config.note('Using link flags: %s' % self.cxx.link_flags)
-        # Print as list to prevent "set([...])" from being printed.
-        self.lit_config.note('Using available_features: %s' %
-                             list(self.config.available_features))
-        show_env_vars = {}
-        for k,v in self.exec_env.items():
-            if k not in os.environ or os.environ[k] != v:
-                show_env_vars[k] = v
-        self.lit_config.note('Adding environment variables: %r' % show_env_vars)
-        sys.stderr.flush()  # Force flushing to avoid broken output on Windows
-
-    def get_test_format(self):
-        from libcxx.test.format import LibcxxTestFormat
-        return LibcxxTestFormat(
-            self.cxx,
-            self.use_clang_verify,
-            self.execute_external,
-            self.executor,
-            exec_env=self.exec_env)
-
-    def configure_executor(self):
-        exec_str = self.get_lit_conf('executor', "None")
-        te = eval(exec_str)
-        if te:
-            self.lit_config.note("Using executor: %r" % exec_str)
-            if self.lit_config.useValgrind:
-                # We have no way of knowing where in the chain the
-                # ValgrindExecutor is supposed to go. It is likely
-                # that the user wants it at the end, but we have no
-                # way of getting at that easily.
-                self.lit_config.fatal("Cannot infer how to create a Valgrind "
-                                      " executor.")
-        else:
-            te = LocalExecutor()
-            if self.lit_config.useValgrind:
-                te = ValgrindExecutor(self.lit_config.valgrindArgs, te)
-
-        te.target_info = self.target_info
-
-        self.executor = te
-
-    def configure_target_info(self):
-        self.target_info = make_target_info(self)
-
-    def configure_cxx(self):
-        # Gather various compiler parameters.
-        cxx = self.get_lit_conf('cxx_under_test')
-        self.cxx_is_clang_cl = cxx is not None and \
-                               os.path.basename(cxx) == 'clang-cl.exe'
-        # If no specific cxx_under_test was given, attempt to infer it as
-        # clang++.
-        if cxx is None or self.cxx_is_clang_cl:
-            search_paths = self.config.environment['PATH']
-            if cxx is not None and os.path.isabs(cxx):
-                search_paths = os.path.dirname(cxx)
-            clangxx = libcxx.util.which('clang++', search_paths)
-            if clangxx:
-                cxx = clangxx
-                self.lit_config.note(
-                    "inferred cxx_under_test as: %r" % cxx)
-            elif self.cxx_is_clang_cl:
-                self.lit_config.fatal('Failed to find clang++ substitution for'
-                                      ' clang-cl')
-        if not cxx:
-            self.lit_config.fatal('must specify user parameter cxx_under_test '
-                                  '(e.g., --param=cxx_under_test=clang++)')
-        self.cxx = CXXCompiler(self, cxx) if not self.cxx_is_clang_cl else \
-                   self._configure_clang_cl(cxx)
-        cxx_type = self.cxx.type
-        if cxx_type is not None:
-            assert self.cxx.version is not None
-            maj_v, min_v, patch_v = self.cxx.version
-            self.config.available_features.add(cxx_type)
-            self.config.available_features.add('%s-%s' % (cxx_type, maj_v))
-            self.config.available_features.add('%s-%s.%s' % (
-                cxx_type, maj_v, min_v))
-            self.config.available_features.add('%s-%s.%s.%s' % (
-                cxx_type, maj_v, min_v, patch_v))
-        self.cxx.compile_env = dict(os.environ)
-        # 'CCACHE_CPP2' prevents ccache from stripping comments while
-        # preprocessing. This is required to prevent stripping of '-verify'
-        # comments.
-        self.cxx.compile_env['CCACHE_CPP2'] = '1'
-
-    def _configure_clang_cl(self, clang_path):
-        def _split_env_var(var):
-            return [p.strip() for p in os.environ.get(var, '').split(';') if p.strip()]
-
-        def _prefixed_env_list(var, prefix):
-            from itertools import chain
-            return list(chain.from_iterable((prefix, path) for path in _split_env_var(var)))
-
-        assert self.cxx_is_clang_cl
-        flags = []
-        compile_flags = _prefixed_env_list('INCLUDE', '-isystem')
-        link_flags = _prefixed_env_list('LIB', '-L')
-        for path in _split_env_var('LIB'):
-            self.add_path(self.exec_env, path)
-        return CXXCompiler(self, clang_path, flags=flags,
-                           compile_flags=compile_flags,
-                           link_flags=link_flags)
-
-    def _dump_macros_verbose(self, *args, **kwargs):
-        macros_or_error = self.cxx.dumpMacros(*args, **kwargs)
-        if isinstance(macros_or_error, tuple):
-            cmd, out, err, rc = macros_or_error
-            report = libcxx.util.makeReport(cmd, out, err, rc)
-            report += "Compiler failed unexpectedly when dumping macros!"
-            self.lit_config.fatal(report)
-            return None
-        assert isinstance(macros_or_error, dict)
-        return macros_or_error
-
-    def configure_src_root(self):
-        self.libcxx_src_root = self.get_lit_conf(
-            'libcxx_src_root', os.path.dirname(self.config.test_source_root))
-
-    def configure_obj_root(self):
-        self.project_obj_root = self.get_lit_conf('project_obj_root')
-        self.libcxx_obj_root = self.get_lit_conf('libcxx_obj_root')
-        if not self.libcxx_obj_root and self.project_obj_root is not None:
-            possible_roots = [
-                os.path.join(self.project_obj_root, 'libcxx'),
-                os.path.join(self.project_obj_root, 'projects', 'libcxx'),
-                os.path.join(self.project_obj_root, 'runtimes', 'libcxx'),
-            ]
-            for possible_root in possible_roots:
-                if os.path.isdir(possible_root):
-                    self.libcxx_obj_root = possible_root
-                    break
-            else:
-                self.libcxx_obj_root = self.project_obj_root
-
-    def configure_cxx_library_root(self):
-        self.cxx_library_root = self.get_lit_conf('cxx_library_root',
-                                                  self.libcxx_obj_root)
-        self.cxx_runtime_root = self.get_lit_conf('cxx_runtime_root',
-                                                   self.cxx_library_root)
-
-    def configure_use_system_cxx_lib(self):
-        # This test suite supports testing against either the system library or
-        # the locally built one; the former mode is useful for testing ABI
-        # compatibility between the current headers and a shipping dynamic
-        # library.
-        # Default to testing against the locally built libc++ library.
-        self.use_system_cxx_lib = self.get_lit_conf('use_system_cxx_lib')
-        if self.use_system_cxx_lib == 'true':
-            self.use_system_cxx_lib = True
-        elif self.use_system_cxx_lib == 'false':
-            self.use_system_cxx_lib = False
-        elif self.use_system_cxx_lib:
-            assert os.path.isdir(self.use_system_cxx_lib), "the specified use_system_cxx_lib parameter (%s) is not a valid directory" % self.use_system_cxx_lib
-            self.use_system_cxx_lib = os.path.abspath(self.use_system_cxx_lib)
-        self.lit_config.note(
-            "inferred use_system_cxx_lib as: %r" % self.use_system_cxx_lib)
-
-    def configure_cxx_stdlib_under_test(self):
-        self.cxx_stdlib_under_test = self.get_lit_conf(
-            'cxx_stdlib_under_test', 'libc++')
-        if self.cxx_stdlib_under_test not in \
-                ['libc++', 'libstdc++', 'msvc', 'cxx_default']:
-            self.lit_config.fatal(
-                'unsupported value for "cxx_stdlib_under_test": %s'
-                % self.cxx_stdlib_under_test)
-        self.config.available_features.add(self.cxx_stdlib_under_test)
-        if self.cxx_stdlib_under_test == 'libstdc++':
-            self.config.available_features.add('libstdc++')
-            # Manually enable the experimental and filesystem tests for libstdc++
-            # if the options aren't present.
-            # FIXME this is a hack.
-            if self.get_lit_conf('enable_experimental') is None:
-                self.config.enable_experimental = 'true'
-
-    def configure_use_clang_verify(self):
-        '''If set, run clang with -verify on failing tests.'''
-        self.use_clang_verify = self.get_lit_bool('use_clang_verify')
-        if self.use_clang_verify is None:
-            # NOTE: We do not test for the -verify flag directly because
-            #   -verify will always exit with non-zero on an empty file.
-            self.use_clang_verify = self.cxx.isVerifySupported()
-            self.lit_config.note(
-                "inferred use_clang_verify as: %r" % self.use_clang_verify)
-        if self.use_clang_verify:
-                self.config.available_features.add('verify-support')
-
-    def configure_use_thread_safety(self):
-        '''If set, run clang with -verify on failing tests.'''
-        has_thread_safety = self.cxx.hasCompileFlag('-Werror=thread-safety')
-        if has_thread_safety:
-            self.cxx.compile_flags += ['-Werror=thread-safety']
-            self.config.available_features.add('thread-safety')
-            self.lit_config.note("enabling thread-safety annotations")
-
-    def configure_execute_external(self):
-        # Choose between lit's internal shell pipeline runner and a real shell.
-        # If LIT_USE_INTERNAL_SHELL is in the environment, we use that as the
-        # default value. Otherwise we ask the target_info.
-        use_lit_shell_default = os.environ.get('LIT_USE_INTERNAL_SHELL')
-        if use_lit_shell_default is not None:
-            use_lit_shell_default = use_lit_shell_default != '0'
-        else:
-            use_lit_shell_default = self.target_info.use_lit_shell_default()
-        # Check for the command line parameter using the default value if it is
-        # not present.
-        use_lit_shell = self.get_lit_bool('use_lit_shell',
-                                          use_lit_shell_default)
-        self.execute_external = not use_lit_shell
-
-    def configure_ccache(self):
-        use_ccache_default = os.environ.get('LIBCXX_USE_CCACHE') is not None
-        use_ccache = self.get_lit_bool('use_ccache', use_ccache_default)
-        if use_ccache:
-            self.cxx.use_ccache = True
-            self.lit_config.note('enabling ccache')
-
-    def add_deployment_feature(self, feature):
-        (arch, name, version) = self.config.deployment
-        self.config.available_features.add('%s=%s-%s' % (feature, arch, name))
-        self.config.available_features.add('%s=%s' % (feature, name))
-        self.config.available_features.add('%s=%s%s' % (feature, name, version))
-
-    def configure_features(self):
-        additional_features = self.get_lit_conf('additional_features')
-        if additional_features:
-            for f in additional_features.split(','):
-                self.config.available_features.add(f.strip())
-        self.target_info.add_locale_features(self.config.available_features)
-
-        target_platform = self.target_info.platform()
-
-        # Write an "available feature" that combines the triple when
-        # use_system_cxx_lib is enabled. This is so that we can easily write
-        # XFAIL markers for tests that are known to fail with versions of
-        # libc++ as were shipped with a particular triple.
-        if self.use_system_cxx_lib:
-            self.config.available_features.add('with_system_cxx_lib')
-            self.config.available_features.add(
-                'with_system_cxx_lib=%s' % self.config.target_triple)
-
-            # Add subcomponents individually.
-            target_components = self.config.target_triple.split('-')
-            for component in target_components:
-                self.config.available_features.add(
-                    'with_system_cxx_lib=%s' % component)
-
-            # Add available features for more generic versions of the target
-            # triple attached to  with_system_cxx_lib.
-            if self.use_deployment:
-                self.add_deployment_feature('with_system_cxx_lib')
-
-        # Configure the availability feature. Availability is only enabled
-        # with libc++, because other standard libraries do not provide
-        # availability markup.
-        if self.use_deployment and self.cxx_stdlib_under_test == 'libc++':
-            self.config.available_features.add('availability')
-            self.add_deployment_feature('availability')
-
-        if self.target_info.is_darwin():
-            self.config.available_features.add('apple-darwin')
-
-        # Insert the platform name into the available features as a lower case.
-        self.config.available_features.add(target_platform)
-
-        # Simulator testing can take a really long time for some of these tests
-        # so add a feature check so we can REQUIRES: long_tests in them
-        self.long_tests = self.get_lit_bool('long_tests')
-        if self.long_tests is None:
-            # Default to running long tests.
-            self.long_tests = True
-            self.lit_config.note(
-                "inferred long_tests as: %r" % self.long_tests)
-
-        if self.long_tests:
-            self.config.available_features.add('long_tests')
-
-        if not self.get_lit_bool('enable_filesystem', default=True):
-            self.config.available_features.add('c++filesystem-disabled')
-            self.config.available_features.add('dylib-has-no-filesystem')
-
-
-        # Run a compile test for the -fsized-deallocation flag. This is needed
-        # in test/std/language.support/support.dynamic/new.delete
-        if self.cxx.hasCompileFlag('-fsized-deallocation'):
-            self.config.available_features.add('-fsized-deallocation')
-
-        if self.cxx.hasCompileFlag('-faligned-allocation'):
-            self.config.available_features.add('-faligned-allocation')
-        else:
-            # FIXME remove this once more than just clang-4.0 support
-            # C++17 aligned allocation.
-            self.config.available_features.add('no-aligned-allocation')
-
-        if self.cxx.hasCompileFlag('-fdelayed-template-parsing'):
-            self.config.available_features.add('fdelayed-template-parsing')
-
-        if self.get_lit_bool('has_libatomic', False):
-            self.config.available_features.add('libatomic')
-
-        macros = self._dump_macros_verbose()
-        if '__cpp_if_constexpr' not in macros:
-            self.config.available_features.add('libcpp-no-if-constexpr')
-
-        if '__cpp_structured_bindings' not in macros:
-            self.config.available_features.add('libcpp-no-structured-bindings')
-
-        if '__cpp_deduction_guides' not in macros or \
-                intMacroValue(macros['__cpp_deduction_guides']) < 201611:
-            self.config.available_features.add('libcpp-no-deduction-guides')
-
-        if self.target_info.is_windows():
-            self.config.available_features.add('windows')
-            if self.cxx_stdlib_under_test == 'libc++':
-                # LIBCXX-WINDOWS-FIXME is the feature name used to XFAIL the
-                # initial Windows failures until they can be properly diagnosed
-                # and fixed. This allows easier detection of new test failures
-                # and regressions. Note: New failures should not be suppressed
-                # using this feature. (Also see llvm.org/PR32730)
-                self.config.available_features.add('LIBCXX-WINDOWS-FIXME')
-
-        # Attempt to detect the glibc version by querying for __GLIBC__
-        # in 'features.h'.
-        macros = self.cxx.dumpMacros(flags=['-include', 'features.h'])
-        if isinstance(macros, dict) and '__GLIBC__' in macros:
-            maj_v, min_v = (macros['__GLIBC__'], macros['__GLIBC_MINOR__'])
-            self.config.available_features.add('glibc')
-            self.config.available_features.add('glibc-%s' % maj_v)
-            self.config.available_features.add('glibc-%s.%s' % (maj_v, min_v))
-
-        libcxx_gdb = self.get_lit_conf('libcxx_gdb')
-        if libcxx_gdb and 'NOTFOUND' not in libcxx_gdb:
-            self.config.available_features.add('libcxx_gdb')
-            self.cxx.libcxx_gdb = libcxx_gdb
-
-        # Support Objective-C++ only on MacOS and if the compiler supports it.
-        if self.target_info.platform() == "darwin" and \
-           self.target_info.is_host_macosx() and \
-           self.cxx.hasCompileFlag(["-x", "objective-c++", "-fobjc-arc"]):
-            self.config.available_features.add("objective-c++")
-
-    def configure_compile_flags(self):
-        self.configure_default_compile_flags()
-        # Configure extra flags
-        compile_flags_str = self.get_lit_conf('compile_flags', '')
-        self.cxx.compile_flags += shlex.split(compile_flags_str)
-        if self.target_info.is_windows():
-            # FIXME: Can we remove this?
-            self.cxx.compile_flags += ['-D_CRT_SECURE_NO_WARNINGS']
-            # Required so that tests using min/max don't fail on Windows,
-            # and so that those tests don't have to be changed to tolerate
-            # this insanity.
-            self.cxx.compile_flags += ['-DNOMINMAX']
-        additional_flags = self.get_lit_conf('test_compiler_flags')
-        if additional_flags:
-            self.cxx.compile_flags += shlex.split(additional_flags)
-
-    def configure_default_compile_flags(self):
-        # Try and get the std version from the command line. Fall back to
-        # default given in lit.site.cfg is not present. If default is not
-        # present then force c++11.
-        std = self.get_lit_conf('std')
-        if not std:
-            # Choose the newest possible language dialect if none is given.
-            possible_stds = ['c++2a', 'c++17', 'c++1z', 'c++14', 'c++11',
-                             'c++03']
-            if self.cxx.type == 'gcc':
-                maj_v, _, _ = self.cxx.version
-                maj_v = int(maj_v)
-                if maj_v < 7:
-                    possible_stds.remove('c++1z')
-                    possible_stds.remove('c++17')
-                # FIXME: How many C++14 tests actually fail under GCC 5 and 6?
-                # Should we XFAIL them individually instead?
-                if maj_v <= 6:
-                    possible_stds.remove('c++14')
-            for s in possible_stds:
-                if self.cxx.hasCompileFlag('-std=%s' % s):
-                    std = s
-                    self.lit_config.note(
-                        'inferred language dialect as: %s' % std)
-                    break
-            if not std:
-                self.lit_config.fatal(
-                    'Failed to infer a supported language dialect from one of %r'
-                    % possible_stds)
-        self.cxx.compile_flags += ['-std={0}'.format(std)]
-        std_feature = std.replace('gnu++', 'c++')
-        std_feature = std.replace('1z', '17')
-        self.config.available_features.add(std_feature)
-        # Configure include paths
-        self.configure_compile_flags_header_includes()
-        self.target_info.add_cxx_compile_flags(self.cxx.compile_flags)
-        # Configure feature flags.
-        self.configure_compile_flags_exceptions()
-        self.configure_compile_flags_rtti()
-        self.configure_compile_flags_abi_version()
-        enable_32bit = self.get_lit_bool('enable_32bit', False)
-        if enable_32bit:
-            self.cxx.flags += ['-m32']
-        # Use verbose output for better errors
-        self.cxx.flags += ['-v']
-        sysroot = self.get_lit_conf('sysroot')
-        if sysroot:
-            self.cxx.flags += ['--sysroot=' + sysroot]
-        gcc_toolchain = self.get_lit_conf('gcc_toolchain')
-        if gcc_toolchain:
-            self.cxx.flags += ['--gcc-toolchain=' + gcc_toolchain]
-        # NOTE: the _DEBUG definition must preceed the triple check because for
-        # the Windows build of libc++, the forced inclusion of a header requires
-        # that _DEBUG is defined.  Incorrect ordering will result in -target
-        # being elided.
-        if self.target_info.is_windows() and self.debug_build:
-            self.cxx.compile_flags += ['-D_DEBUG']
-        if self.use_target:
-            if not self.cxx.addFlagIfSupported(
-                    ['--target=' + self.config.target_triple]):
-                self.lit_config.warning('use_target is true but --target is '\
-                        'not supported by the compiler')
-        if self.use_deployment:
-            arch, name, version = self.config.deployment
-            self.cxx.flags += ['-arch', arch]
-            self.cxx.flags += ['-m' + name + '-version-min=' + version]
-
-        # Add includes for support headers used in the tests.
-        support_path = os.path.join(self.libcxx_src_root, 'test/support')
-        self.cxx.compile_flags += ['-I' + support_path]
-
-        # Add includes for the PSTL headers
-        pstl_src_root = self.get_lit_conf('pstl_src_root')
-        pstl_obj_root = self.get_lit_conf('pstl_obj_root')
-        if pstl_src_root is not None and pstl_obj_root is not None:
-            self.cxx.compile_flags += ['-I' + os.path.join(pstl_src_root, 'include')]
-            self.cxx.compile_flags += ['-I' + os.path.join(pstl_obj_root, 'generated_headers')]
-            self.cxx.compile_flags += ['-I' + os.path.join(pstl_src_root, 'test')]
-            self.config.available_features.add('parallel-algorithms')
-
-        # FIXME(EricWF): variant_size.pass.cpp requires a slightly larger
-        # template depth with older Clang versions.
-        self.cxx.addFlagIfSupported('-ftemplate-depth=270')
-
-    def configure_compile_flags_header_includes(self):
-        support_path = os.path.join(self.libcxx_src_root, 'test', 'support')
-        self.configure_config_site_header()
-        if self.cxx_stdlib_under_test != 'libstdc++' and \
-           not self.target_info.is_windows():
-            self.cxx.compile_flags += [
-                '-include', os.path.join(support_path, 'nasty_macros.h')]
-        if self.cxx_stdlib_under_test == 'msvc':
-            self.cxx.compile_flags += [
-                '-include', os.path.join(support_path,
-                                         'msvc_stdlib_force_include.h')]
-            pass
-        if self.target_info.is_windows() and self.debug_build and \
-                self.cxx_stdlib_under_test != 'msvc':
-            self.cxx.compile_flags += [
-                '-include', os.path.join(support_path,
-                                         'set_windows_crt_report_mode.h')
-            ]
-        cxx_headers = self.get_lit_conf('cxx_headers')
-        if cxx_headers == '' or (cxx_headers is None
-                                 and self.cxx_stdlib_under_test != 'libc++'):
-            self.lit_config.note('using the system cxx headers')
-            return
-        self.cxx.compile_flags += ['-nostdinc++']
-        if cxx_headers is None:
-            cxx_headers = os.path.join(self.libcxx_src_root, 'include')
-        if not os.path.isdir(cxx_headers):
-            self.lit_config.fatal("cxx_headers='%s' is not a directory."
-                                  % cxx_headers)
-        self.cxx.compile_flags += ['-I' + cxx_headers]
-        if self.libcxx_obj_root is not None:
-            cxxabi_headers = os.path.join(self.libcxx_obj_root, 'include',
-                                          'c++build')
-            if os.path.isdir(cxxabi_headers):
-                self.cxx.compile_flags += ['-I' + cxxabi_headers]
-
-    def configure_config_site_header(self):
-        # Check for a possible __config_site in the build directory. We
-        # use this if it exists.
-        if self.libcxx_obj_root is None:
-            return
-        config_site_header = os.path.join(self.libcxx_obj_root, '__config_site')
-        if not os.path.isfile(config_site_header):
-            return
-        contained_macros = self.parse_config_site_and_add_features(
-            config_site_header)
-        self.lit_config.note('Using __config_site header %s with macros: %r'
-            % (config_site_header, contained_macros))
-        # FIXME: This must come after the call to
-        # 'parse_config_site_and_add_features(...)' in order for it to work.
-        self.cxx.compile_flags += ['-include', config_site_header]
-
-    def parse_config_site_and_add_features(self, header):
-        """ parse_config_site_and_add_features - Deduce and add the test
-            features that that are implied by the #define's in the __config_site
-            header. Return a dictionary containing the macros found in the
-            '__config_site' header.
-        """
-        # Parse the macro contents of __config_site by dumping the macros
-        # using 'c++ -dM -E' and filtering the predefines.
-        predefines = self._dump_macros_verbose()
-        macros = self._dump_macros_verbose(header)
-        feature_macros_keys = set(macros.keys()) - set(predefines.keys())
-        feature_macros = {}
-        for k in feature_macros_keys:
-            feature_macros[k] = macros[k]
-        # We expect the header guard to be one of the definitions
-        assert '_LIBCPP_CONFIG_SITE' in feature_macros
-        del feature_macros['_LIBCPP_CONFIG_SITE']
-        # The __config_site header should be non-empty. Otherwise it should
-        # have never been emitted by CMake.
-        assert len(feature_macros) > 0
-        # FIXME: This is a hack that should be fixed using module maps.
-        # If modules are enabled then we have to lift all of the definitions
-        # in __config_site onto the command line.
-        for m in feature_macros:
-            define = '-D%s' % m
-            if feature_macros[m]:
-                define += '=%s' % (feature_macros[m])
-            self.cxx.modules_flags += [define]
-        self.cxx.compile_flags += ['-Wno-macro-redefined']
-        # Transform each macro name into the feature name used in the tests.
-        # Ex. _LIBCPP_HAS_NO_THREADS -> libcpp-has-no-threads
-        for m in feature_macros:
-            if m == '_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS' or \
-               m == '_LIBCPP_HIDE_FROM_ABI_PER_TU_BY_DEFAULT':
-                continue
-            if m == '_LIBCPP_ABI_VERSION':
-                self.config.available_features.add('libcpp-abi-version-v%s'
-                    % feature_macros[m])
-                continue
-            if m == '_LIBCPP_NO_VCRUNTIME':
-                self.config.available_features.add('libcpp-no-vcruntime')
-                continue
-            assert m.startswith('_LIBCPP_HAS_') or m.startswith('_LIBCPP_ABI_')
-            m = m.lower()[1:].replace('_', '-')
-            self.config.available_features.add(m)
-        return feature_macros
-
-
-
-    def configure_compile_flags_exceptions(self):
-        enable_exceptions = self.get_lit_bool('enable_exceptions', True)
-        if not enable_exceptions:
-            self.config.available_features.add('libcpp-no-exceptions')
-            self.cxx.compile_flags += ['-fno-exceptions']
-
-    def configure_compile_flags_rtti(self):
-        enable_rtti = self.get_lit_bool('enable_rtti', True)
-        if not enable_rtti:
-            self.config.available_features.add('libcpp-no-rtti')
-            self.cxx.compile_flags += ['-fno-rtti', '-D_LIBCPP_NO_RTTI']
-
-    def configure_compile_flags_abi_version(self):
-        abi_version = self.get_lit_conf('abi_version', '').strip()
-        abi_unstable = self.get_lit_bool('abi_unstable')
-        # Only add the ABI version when it is non-default.
-        # FIXME(EricWF): Get the ABI version from the "__config_site".
-        if abi_version and abi_version != '1':
-          self.cxx.compile_flags += ['-D_LIBCPP_ABI_VERSION=' + abi_version]
-        if abi_unstable:
-          self.config.available_features.add('libcpp-abi-unstable')
-          self.cxx.compile_flags += ['-D_LIBCPP_ABI_UNSTABLE']
-
-    def configure_filesystem_compile_flags(self):
-        static_env = os.path.join(self.libcxx_src_root, 'test', 'std',
-                                  'input.output', 'filesystems', 'Inputs', 'static_test_env')
-        static_env = os.path.realpath(static_env)
-        assert os.path.isdir(static_env)
-        self.cxx.compile_flags += ['-DLIBCXX_FILESYSTEM_STATIC_TEST_ROOT="%s"' % static_env]
-
-        dynamic_env = os.path.join(self.config.test_exec_root,
-                                   'filesystem', 'Output', 'dynamic_env')
-        dynamic_env = os.path.realpath(dynamic_env)
-        if not os.path.isdir(dynamic_env):
-            os.makedirs(dynamic_env)
-        self.cxx.compile_flags += ['-DLIBCXX_FILESYSTEM_DYNAMIC_TEST_ROOT="%s"' % dynamic_env]
-        self.exec_env['LIBCXX_FILESYSTEM_DYNAMIC_TEST_ROOT'] = ("%s" % dynamic_env)
-
-        dynamic_helper = os.path.join(self.libcxx_src_root, 'test', 'support',
-                                      'filesystem_dynamic_test_helper.py')
-        assert os.path.isfile(dynamic_helper)
-
-        self.cxx.compile_flags += ['-DLIBCXX_FILESYSTEM_DYNAMIC_TEST_HELPER="%s %s"'
-                                   % (sys.executable, dynamic_helper)]
-
-
-    def configure_link_flags(self):
-        # Configure library path
-        self.configure_link_flags_cxx_library_path()
-        self.configure_link_flags_abi_library_path()
-
-        # Configure libraries
-        if self.cxx_stdlib_under_test == 'libc++':
-            self.cxx.link_flags += ['-nodefaultlibs']
-            # FIXME: Handle MSVCRT as part of the ABI library handling.
-            if self.target_info.is_windows():
-                self.cxx.link_flags += ['-nostdlib']
-            self.configure_link_flags_cxx_library()
-            self.configure_link_flags_abi_library()
-            self.configure_extra_library_flags()
-        elif self.cxx_stdlib_under_test == 'libstdc++':
-            self.config.available_features.add('c++experimental')
-            self.cxx.link_flags += ['-lstdc++fs', '-lm', '-pthread']
-        elif self.cxx_stdlib_under_test == 'msvc':
-            # FIXME: Correctly setup debug/release flags here.
-            pass
-        elif self.cxx_stdlib_under_test == 'cxx_default':
-            self.cxx.link_flags += ['-pthread']
-        else:
-            self.lit_config.fatal('invalid stdlib under test')
-
-        link_flags_str = self.get_lit_conf('link_flags', '')
-        self.cxx.link_flags += shlex.split(link_flags_str)
-
-    def configure_link_flags_cxx_library_path(self):
-        if not self.use_system_cxx_lib:
-            if self.cxx_library_root:
-                self.cxx.link_flags += ['-L' + self.cxx_library_root]
-                if self.target_info.is_windows() and self.link_shared:
-                    self.add_path(self.cxx.compile_env, self.cxx_library_root)
-            if self.cxx_runtime_root:
-                if not self.target_info.is_windows():
-                    self.cxx.link_flags += ['-Wl,-rpath,' +
-                                            self.cxx_runtime_root]
-                elif self.target_info.is_windows() and self.link_shared:
-                    self.add_path(self.exec_env, self.cxx_runtime_root)
-        elif os.path.isdir(str(self.use_system_cxx_lib)):
-            self.cxx.link_flags += ['-L' + self.use_system_cxx_lib]
-            if not self.target_info.is_windows():
-                self.cxx.link_flags += ['-Wl,-rpath,' +
-                                        self.use_system_cxx_lib]
-            if self.target_info.is_windows() and self.link_shared:
-                self.add_path(self.cxx.compile_env, self.use_system_cxx_lib)
-        additional_flags = self.get_lit_conf('test_linker_flags')
-        if additional_flags:
-            self.cxx.link_flags += shlex.split(additional_flags)
-
-    def configure_link_flags_abi_library_path(self):
-        # Configure ABI library paths.
-        self.abi_library_root = self.get_lit_conf('abi_library_path')
-        if self.abi_library_root:
-            self.cxx.link_flags += ['-L' + self.abi_library_root]
-            if not self.target_info.is_windows():
-                self.cxx.link_flags += ['-Wl,-rpath,' + self.abi_library_root]
-            else:
-                self.add_path(self.exec_env, self.abi_library_root)
-
-    def configure_link_flags_cxx_library(self):
-        libcxx_experimental = self.get_lit_bool('enable_experimental', default=False)
-        if libcxx_experimental:
-            self.config.available_features.add('c++experimental')
-            self.cxx.link_flags += ['-lc++experimental']
-        if self.link_shared:
-            self.cxx.link_flags += ['-lc++']
-        else:
-            cxx_library_root = self.get_lit_conf('cxx_library_root')
-            if cxx_library_root:
-                libname = self.make_static_lib_name('c++')
-                abs_path = os.path.join(cxx_library_root, libname)
-                assert os.path.exists(abs_path) and \
-                       "static libc++ library does not exist"
-                self.cxx.link_flags += [abs_path]
-            else:
-                self.cxx.link_flags += ['-lc++']
-
-    def configure_link_flags_abi_library(self):
-        cxx_abi = self.get_lit_conf('cxx_abi', 'libcxxabi')
-        if cxx_abi == 'libstdc++':
-            self.cxx.link_flags += ['-lstdc++']
-        elif cxx_abi == 'libsupc++':
-            self.cxx.link_flags += ['-lsupc++']
-        elif cxx_abi == 'libcxxabi':
-            # If the C++ library requires explicitly linking to libc++abi, or
-            # if we're testing libc++abi itself (the test configs are shared),
-            # then link it.
-            testing_libcxxabi = self.get_lit_conf('name', '') == 'libc++abi'
-            if self.target_info.allow_cxxabi_link() or testing_libcxxabi:
-                libcxxabi_shared = self.get_lit_bool('libcxxabi_shared', default=True)
-                if libcxxabi_shared:
-                    self.cxx.link_flags += ['-lc++abi']
-                else:
-                    cxxabi_library_root = self.get_lit_conf('abi_library_path')
-                    if cxxabi_library_root:
-                        libname = self.make_static_lib_name('c++abi')
-                        abs_path = os.path.join(cxxabi_library_root, libname)
-                        self.cxx.link_flags += [abs_path]
-                    else:
-                        self.cxx.link_flags += ['-lc++abi']
-        elif cxx_abi == 'libcxxrt':
-            self.cxx.link_flags += ['-lcxxrt']
-        elif cxx_abi == 'vcruntime':
-            debug_suffix = 'd' if self.debug_build else ''
-            self.cxx.link_flags += ['-l%s%s' % (lib, debug_suffix) for lib in
-                                    ['vcruntime', 'ucrt', 'msvcrt']]
-        elif cxx_abi == 'none' or cxx_abi == 'default':
-            if self.target_info.is_windows():
-                debug_suffix = 'd' if self.debug_build else ''
-                self.cxx.link_flags += ['-lmsvcrt%s' % debug_suffix]
-        else:
-            self.lit_config.fatal(
-                'C++ ABI setting %s unsupported for tests' % cxx_abi)
-
-    def configure_extra_library_flags(self):
-        if self.get_lit_bool('cxx_ext_threads', default=False):
-            self.cxx.link_flags += ['-lc++external_threads']
-        self.target_info.add_cxx_link_flags(self.cxx.link_flags)
-
-    def configure_color_diagnostics(self):
-        use_color = self.get_lit_conf('color_diagnostics')
-        if use_color is None:
-            use_color = os.environ.get('LIBCXX_COLOR_DIAGNOSTICS')
-        if use_color is None:
-            return
-        if use_color != '':
-            self.lit_config.fatal('Invalid value for color_diagnostics "%s".'
-                                  % use_color)
-        color_flag = '-fdiagnostics-color=always'
-        # Check if the compiler supports the color diagnostics flag. Issue a
-        # warning if it does not since color diagnostics have been requested.
-        if not self.cxx.hasCompileFlag(color_flag):
-            self.lit_config.warning(
-                'color diagnostics have been requested but are not supported '
-                'by the compiler')
-        else:
-            self.cxx.flags += [color_flag]
-
-    def configure_debug_mode(self):
-        debug_level = self.get_lit_conf('debug_level', None)
-        if not debug_level:
-            return
-        if debug_level not in ['0', '1']:
-            self.lit_config.fatal('Invalid value for debug_level "%s".'
-                                  % debug_level)
-        self.cxx.compile_flags += ['-D_LIBCPP_DEBUG=%s' % debug_level]
-
-    def configure_warnings(self):
-        # Turn on warnings by default for Clang based compilers when C++ >= 11
-        default_enable_warnings = self.cxx.type in ['clang', 'apple-clang'] \
-            and len(self.config.available_features.intersection(
-                ['c++11', 'c++14', 'c++17', 'c++2a'])) != 0
-        enable_warnings = self.get_lit_bool('enable_warnings',
-                                            default_enable_warnings)
-        self.cxx.useWarnings(enable_warnings)
-        self.cxx.warning_flags += [
-            '-D_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER',
-            '-Wall', '-Wextra', '-Werror'
-        ]
-        if self.cxx.hasWarningFlag('-Wuser-defined-warnings'):
-            self.cxx.warning_flags += ['-Wuser-defined-warnings']
-            self.config.available_features.add('diagnose-if-support')
-        self.cxx.addWarningFlagIfSupported('-Wshadow')
-        self.cxx.addWarningFlagIfSupported('-Wno-unused-command-line-argument')
-        self.cxx.addWarningFlagIfSupported('-Wno-attributes')
-        self.cxx.addWarningFlagIfSupported('-Wno-pessimizing-move')
-        self.cxx.addWarningFlagIfSupported('-Wno-c++11-extensions')
-        self.cxx.addWarningFlagIfSupported('-Wno-user-defined-literals')
-        self.cxx.addWarningFlagIfSupported('-Wno-noexcept-type')
-        self.cxx.addWarningFlagIfSupported('-Wno-aligned-allocation-unavailable')
-        # These warnings should be enabled in order to support the MSVC
-        # team using the test suite; They enable the warnings below and
-        # expect the test suite to be clean.
-        self.cxx.addWarningFlagIfSupported('-Wsign-compare')
-        self.cxx.addWarningFlagIfSupported('-Wunused-variable')
-        self.cxx.addWarningFlagIfSupported('-Wunused-parameter')
-        self.cxx.addWarningFlagIfSupported('-Wunreachable-code')
-        std = self.get_lit_conf('std', None)
-        if std in ['c++98', 'c++03']:
-            # The '#define static_assert' provided by libc++ in C++03 mode
-            # causes an unused local typedef whenever it is used.
-            self.cxx.addWarningFlagIfSupported('-Wno-unused-local-typedef')
-
-    def configure_sanitizer(self):
-        san = self.get_lit_conf('use_sanitizer', '').strip()
-        if san:
-            self.target_info.add_sanitizer_features(san, self.config.available_features)
-            # Search for llvm-symbolizer along the compiler path first
-            # and then along the PATH env variable.
-            symbolizer_search_paths = os.environ.get('PATH', '')
-            cxx_path = libcxx.util.which(self.cxx.path)
-            if cxx_path is not None:
-                symbolizer_search_paths = (
-                    os.path.dirname(cxx_path) +
-                    os.pathsep + symbolizer_search_paths)
-            llvm_symbolizer = libcxx.util.which('llvm-symbolizer',
-                                                symbolizer_search_paths)
-
-            def add_ubsan():
-                self.cxx.flags += ['-fsanitize=undefined',
-                                   '-fno-sanitize=float-divide-by-zero',
-                                   '-fno-sanitize-recover=all']
-                self.exec_env['UBSAN_OPTIONS'] = 'print_stacktrace=1'
-                self.config.available_features.add('ubsan')
-
-            # Setup the sanitizer compile flags
-            self.cxx.flags += ['-g', '-fno-omit-frame-pointer']
-            if san == 'Address' or san == 'Address;Undefined' or san == 'Undefined;Address':
-                self.cxx.flags += ['-fsanitize=address']
-                if llvm_symbolizer is not None:
-                    self.exec_env['ASAN_SYMBOLIZER_PATH'] = llvm_symbolizer
-                # FIXME: Turn ODR violation back on after PR28391 is resolved
-                # https://bugs.llvm.org/show_bug.cgi?id=28391
-                self.exec_env['ASAN_OPTIONS'] = 'detect_odr_violation=0'
-                self.config.available_features.add('asan')
-                self.config.available_features.add('sanitizer-new-delete')
-                self.cxx.compile_flags += ['-O1']
-                if san == 'Address;Undefined' or san == 'Undefined;Address':
-                    add_ubsan()
-            elif san == 'Memory' or san == 'MemoryWithOrigins':
-                self.cxx.flags += ['-fsanitize=memory']
-                if san == 'MemoryWithOrigins':
-                    self.cxx.compile_flags += [
-                        '-fsanitize-memory-track-origins']
-                if llvm_symbolizer is not None:
-                    self.exec_env['MSAN_SYMBOLIZER_PATH'] = llvm_symbolizer
-                self.config.available_features.add('msan')
-                self.config.available_features.add('sanitizer-new-delete')
-                self.cxx.compile_flags += ['-O1']
-            elif san == 'Undefined':
-                add_ubsan()
-                self.cxx.compile_flags += ['-O2']
-            elif san == 'Thread':
-                self.cxx.flags += ['-fsanitize=thread']
-                self.config.available_features.add('tsan')
-                self.config.available_features.add('sanitizer-new-delete')
-            else:
-                self.lit_config.fatal('unsupported value for '
-                                      'use_sanitizer: {0}'.format(san))
-            san_lib = self.get_lit_conf('sanitizer_library')
-            if san_lib:
-                self.cxx.link_flags += [
-                    san_lib, '-Wl,-rpath,%s' % os.path.dirname(san_lib)]
-
-    def configure_coverage(self):
-        self.generate_coverage = self.get_lit_bool('generate_coverage', False)
-        if self.generate_coverage:
-            self.cxx.flags += ['-g', '--coverage']
-            self.cxx.compile_flags += ['-O0']
-
-    def configure_coroutines(self):
-        if self.cxx.hasCompileFlag('-fcoroutines-ts'):
-            macros = self._dump_macros_verbose(flags=['-fcoroutines-ts'])
-            if '__cpp_coroutines' not in macros:
-                self.lit_config.warning('-fcoroutines-ts is supported but '
-                    '__cpp_coroutines is not defined')
-            # Consider coroutines supported only when the feature test macro
-            # reflects a recent value.
-            if intMacroValue(macros['__cpp_coroutines']) >= 201703:
-                self.config.available_features.add('fcoroutines-ts')
-
-    def configure_modules(self):
-        modules_flags = ['-fmodules']
-        if not self.target_info.is_darwin():
-            modules_flags += ['-Xclang', '-fmodules-local-submodule-visibility']
-        supports_modules = self.cxx.hasCompileFlag(modules_flags)
-        enable_modules = self.get_modules_enabled()
-        if enable_modules and not supports_modules:
-            self.lit_config.fatal(
-                '-fmodules is enabled but not supported by the compiler')
-        if not supports_modules:
-            return
-        self.config.available_features.add('modules-support')
-        module_cache = os.path.join(self.config.test_exec_root,
-                                   'modules.cache')
-        module_cache = os.path.realpath(module_cache)
-        if os.path.isdir(module_cache):
-            shutil.rmtree(module_cache)
-        os.makedirs(module_cache)
-        self.cxx.modules_flags += modules_flags + \
-            ['-fmodules-cache-path=' + module_cache]
-        if enable_modules:
-            self.config.available_features.add('-fmodules')
-            self.cxx.useModules()
-
-    def configure_substitutions(self):
-        tool_env = ''
-        if self.target_info.is_darwin():
-            # Do not pass DYLD_LIBRARY_PATH to the compiler, linker, etc. as
-            # these tools are not meant to exercise the just-built libraries.
-            tool_env += 'DYLD_LIBRARY_PATH="" '
-
-        sub = self.config.substitutions
-        cxx_path = tool_env + pipes.quote(self.cxx.path)
-        # Configure compiler substitutions
-        sub.append(('%cxx', cxx_path))
-        sub.append(('%libcxx_src_root', self.libcxx_src_root))
-        # Configure flags substitutions
-        flags_str = ' '.join([pipes.quote(f) for f in self.cxx.flags])
-        compile_flags_str = ' '.join([pipes.quote(f) for f in self.cxx.compile_flags])
-        link_flags_str = ' '.join([pipes.quote(f) for f in self.cxx.link_flags])
-        all_flags = '%s %s %s' % (flags_str, compile_flags_str, link_flags_str)
-        sub.append(('%flags', flags_str))
-        sub.append(('%compile_flags', compile_flags_str))
-        sub.append(('%link_flags', link_flags_str))
-        sub.append(('%all_flags', all_flags))
-        if self.cxx.isVerifySupported():
-            verify_str = ' ' + ' '.join(self.cxx.verify_flags) + ' '
-            sub.append(('%verify', verify_str))
-        # Add compile and link shortcuts
-        compile_str = (cxx_path + ' -o %t.o %s -c ' + flags_str
-                       + ' ' + compile_flags_str)
-        link_str = (cxx_path + ' -o %t.exe %t.o ' + flags_str + ' '
-                    + link_flags_str)
-        assert type(link_str) is str
-        build_str = cxx_path + ' -o %t.exe %s ' + all_flags
-        if self.cxx.use_modules:
-            sub.append(('%compile_module', compile_str))
-            sub.append(('%build_module', build_str))
-        elif self.cxx.modules_flags is not None:
-            modules_str = ' '.join(self.cxx.modules_flags) + ' '
-            sub.append(('%compile_module', compile_str + ' ' + modules_str))
-            sub.append(('%build_module', build_str + ' ' + modules_str))
-        sub.append(('%compile', compile_str))
-        sub.append(('%link', link_str))
-        sub.append(('%build', build_str))
-        # Configure exec prefix substitutions.
-        # Configure run env substitution.
-        codesign_ident = self.get_lit_conf('llvm_codesign_identity', '')
-        run_py = os.path.join(self.libcxx_src_root, 'utils', 'run.py')
-        run_str = '%s %s "%s" %%t.exe' % (pipes.quote(sys.executable), \
-                                          pipes.quote(run_py), codesign_ident)
-        sub.append(('%run', run_str))
-        # Configure not program substitutions
-        not_py = os.path.join(self.libcxx_src_root, 'utils', 'not.py')
-        not_str = '%s %s ' % (pipes.quote(sys.executable), pipes.quote(not_py))
-        sub.append(('not ', not_str))
-        if self.get_lit_conf('libcxx_gdb'):
-            sub.append(('%libcxx_gdb', self.get_lit_conf('libcxx_gdb')))
-
-    def can_use_deployment(self):
-        # Check if the host is on an Apple platform using clang.
-        if not self.target_info.is_darwin():
-            return False
-        if not self.target_info.is_host_macosx():
-            return False
-        if not self.cxx.type.endswith('clang'):
-            return False
-        return True
-
-    def configure_triple(self):
-        # Get or infer the target triple.
-        target_triple = self.get_lit_conf('target_triple')
-        self.use_target = self.get_lit_bool('use_target', False)
-        if self.use_target and target_triple:
-            self.lit_config.warning('use_target is true but no triple is specified')
-
-        # Use deployment if possible.
-        self.use_deployment = not self.use_target and self.can_use_deployment()
-        if self.use_deployment:
-            return
-
-        # Save the triple (and warn on Apple platforms).
-        self.config.target_triple = target_triple
-        if self.use_target and 'apple' in target_triple:
-            self.lit_config.warning('consider using arch and platform instead'
-                                    ' of target_triple on Apple platforms')
-
-        # If no target triple was given, try to infer it from the compiler
-        # under test.
-        if not self.config.target_triple:
-            target_triple = self.cxx.getTriple()
-            # Drop sub-major version components from the triple, because the
-            # current XFAIL handling expects exact matches for feature checks.
-            # Example: x86_64-apple-darwin14.0.0 -> x86_64-apple-darwin14
-            # The 5th group handles triples greater than 3 parts
-            # (ex x86_64-pc-linux-gnu).
-            target_triple = re.sub(r'([^-]+)-([^-]+)-([^.]+)([^-]*)(.*)',
-                                   r'\1-\2-\3\5', target_triple)
-            # linux-gnu is needed in the triple to properly identify linuxes
-            # that use GLIBC. Handle redhat and opensuse triples as special
-            # cases and append the missing `-gnu` portion.
-            if (target_triple.endswith('redhat-linux') or
-                target_triple.endswith('suse-linux')):
-                target_triple += '-gnu'
-            self.config.target_triple = target_triple
-            self.lit_config.note(
-                "inferred target_triple as: %r" % self.config.target_triple)
-
-    def configure_deployment(self):
-        assert not self.use_deployment is None
-        assert not self.use_target is None
-        if not self.use_deployment:
-            # Warn about ignored parameters.
-            if self.get_lit_conf('arch'):
-                self.lit_config.warning('ignoring arch, using target_triple')
-            if self.get_lit_conf('platform'):
-                self.lit_config.warning('ignoring platform, using target_triple')
-            return
-
-        assert not self.use_target
-        assert self.target_info.is_host_macosx()
-
-        # Always specify deployment explicitly on Apple platforms, since
-        # otherwise a platform is picked up from the SDK.  If the SDK version
-        # doesn't match the system version, tests that use the system library
-        # may fail spuriously.
-        arch = self.get_lit_conf('arch')
-        if not arch:
-            arch = self.cxx.getTriple().split('-', 1)[0]
-            self.lit_config.note("inferred arch as: %r" % arch)
-
-        inferred_platform, name, version = self.target_info.get_platform()
-        if inferred_platform:
-            self.lit_config.note("inferred platform as: %r" % (name + version))
-        self.config.deployment = (arch, name, version)
-
-        # Set the target triple for use by lit.
-        self.config.target_triple = arch + '-apple-' + name + version
-        self.lit_config.note(
-            "computed target_triple as: %r" % self.config.target_triple)
-
-        # If we're testing a system libc++ as opposed to the upstream LLVM one,
-        # take the version of the system libc++ into account to compute which
-        # features are enabled/disabled. Otherwise, disable availability markup,
-        # which is not relevant for non-shipped flavors of libc++.
-        if self.use_system_cxx_lib:
-            # Dylib support for shared_mutex was added in macosx10.12.
-            if name == 'macosx' and version in ('10.%s' % v for v in range(7, 12)):
-                self.config.available_features.add('dylib-has-no-shared_mutex')
-                self.lit_config.note("shared_mutex is not supported by the deployment target")
-            # Throwing bad_optional_access, bad_variant_access and bad_any_cast is
-            # supported starting in macosx10.14.
-            if name == 'macosx' and version in ('10.%s' % v for v in range(7, 14)):
-                self.config.available_features.add('dylib-has-no-bad_optional_access')
-                self.lit_config.note("throwing bad_optional_access is not supported by the deployment target")
-
-                self.config.available_features.add('dylib-has-no-bad_variant_access')
-                self.lit_config.note("throwing bad_variant_access is not supported by the deployment target")
-
-                self.config.available_features.add('dylib-has-no-bad_any_cast')
-                self.lit_config.note("throwing bad_any_cast is not supported by the deployment target")
-            # Filesystem is support on Apple platforms starting with macosx10.15.
-            if name == 'macosx' and version in ('10.%s' % v for v in range(7, 15)):
-                self.config.available_features.add('dylib-has-no-filesystem')
-                self.lit_config.note("the deployment target does not support <filesystem>")
-        else:
-            self.cxx.flags += ['-D_LIBCPP_DISABLE_AVAILABILITY']
-
-    def configure_env(self):
-        self.target_info.configure_env(self.exec_env)
-
-    def add_path(self, dest_env, new_path):
-        self.target_info.add_path(dest_env, new_path)
diff --git a/gnu/llvm/libcxx/utils/libcxx/test/target_info.py b/gnu/llvm/libcxx/utils/libcxx/test/target_info.py
deleted file mode 100644
index fa57a2c7485..00000000000
--- a/gnu/llvm/libcxx/utils/libcxx/test/target_info.py
+++ /dev/null
@@ -1,311 +0,0 @@
-#===----------------------------------------------------------------------===//
-#
-# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-# See https://llvm.org/LICENSE.txt for license information.
-# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-#
-#===----------------------------------------------------------------------===//
-
-import importlib
-import locale
-import os
-import platform
-import re
-import subprocess
-import sys
-
-from libcxx.util import executeCommand
-
-class DefaultTargetInfo(object):
-    def __init__(self, full_config):
-        self.full_config = full_config
-
-    def platform(self):
-        return sys.platform.lower().strip()
-
-    def is_windows(self):
-        return self.platform() == 'win32'
-
-    def is_darwin(self):
-        return self.platform() == 'darwin'
-
-    def add_locale_features(self, features):
-        self.full_config.lit_config.warning(
-            "No locales entry for target_system: %s" % self.platform())
-
-    def add_cxx_compile_flags(self, flags): pass
-    def add_cxx_link_flags(self, flags): pass
-    def configure_env(self, env): pass
-    def allow_cxxabi_link(self): return True
-    def add_sanitizer_features(self, sanitizer_type, features): pass
-    def use_lit_shell_default(self): return False
-
-    def add_path(self, dest_env, new_path):
-        if not new_path:
-            return
-        if 'PATH' not in dest_env:
-            dest_env['PATH'] = new_path
-        else:
-            split_char = ';' if self.is_windows() else ':'
-            dest_env['PATH'] = '%s%s%s' % (new_path, split_char,
-                                           dest_env['PATH'])
-
-
-def test_locale(loc):
-    assert loc is not None
-    default_locale = locale.setlocale(locale.LC_ALL)
-    try:
-        locale.setlocale(locale.LC_ALL, loc)
-        return True
-    except locale.Error:
-        return False
-    finally:
-        locale.setlocale(locale.LC_ALL, default_locale)
-
-
-def add_common_locales(features, lit_config, is_windows=False):
-    # A list of locales needed by the test-suite.
-    # The list uses the canonical name for the locale used in the test-suite
-    # TODO: On Linux ISO8859 *may* needs to hyphenated.
-    locales = [
-        ('en_US.UTF-8', 'English_United States.1252'),
-        ('fr_FR.UTF-8', 'French_France.1252'),
-        ('ru_RU.UTF-8', 'Russian_Russia.1251'),
-        ('zh_CN.UTF-8', 'Chinese_China.936'),
-        ('fr_CA.ISO8859-1', 'French_Canada.1252'),
-        ('cs_CZ.ISO8859-2', 'Czech_Czech Republic.1250')
-    ]
-    for loc_id, windows_loc_name in locales:
-        loc_name = windows_loc_name if is_windows else loc_id
-        if test_locale(loc_name):
-            features.add('locale.{0}'.format(loc_id))
-        else:
-            lit_config.warning('The locale {0} is not supported by '
-                               'your platform. Some tests will be '
-                               'unsupported.'.format(loc_name))
-
-
-class DarwinLocalTI(DefaultTargetInfo):
-    def __init__(self, full_config):
-        super(DarwinLocalTI, self).__init__(full_config)
-
-    def is_host_macosx(self):
-        name = subprocess.check_output(['sw_vers', '-productName']).strip()
-        return name == "Mac OS X"
-
-    def get_macosx_version(self):
-        assert self.is_host_macosx()
-        version = subprocess.check_output(
-            ['sw_vers', '-productVersion']).strip()
-        version = re.sub(r'([0-9]+\.[0-9]+)(\..*)?', r'\1', version)
-        return version
-
-    def get_sdk_version(self, name):
-        assert self.is_host_macosx()
-        cmd = ['xcrun', '--sdk', name, '--show-sdk-path']
-        try:
-            out = subprocess.check_output(cmd).strip()
-        except OSError:
-            pass
-
-        if not out:
-            self.full_config.lit_config.fatal(
-                    "cannot infer sdk version with: %r" % cmd)
-
-        return re.sub(r'.*/[^0-9]+([0-9.]+)\.sdk', r'\1', out)
-
-    def get_platform(self):
-        platform = self.full_config.get_lit_conf('platform')
-        if platform:
-            platform = re.sub(r'([^0-9]+)([0-9\.]*)', r'\1-\2', platform)
-            name, version = tuple(platform.split('-', 1))
-        else:
-            name = 'macosx'
-            version = None
-
-        if version:
-            return (False, name, version)
-
-        # Infer the version, either from the SDK or the system itself.  For
-        # macosx, ignore the SDK version; what matters is what's at
-        # /usr/lib/libc++.dylib.
-        if name == 'macosx':
-            version = self.get_macosx_version()
-        else:
-            version = self.get_sdk_version(name)
-        return (True, name, version)
-
-    def add_locale_features(self, features):
-        add_common_locales(features, self.full_config.lit_config)
-
-    def add_cxx_compile_flags(self, flags):
-        if self.full_config.use_deployment:
-            _, name, _ = self.full_config.config.deployment
-            cmd = ['xcrun', '--sdk', name, '--show-sdk-path']
-        else:
-            cmd = ['xcrun', '--show-sdk-path']
-        out, err, exit_code = executeCommand(cmd)
-        if exit_code != 0:
-            self.full_config.lit_config.warning("Could not determine macOS SDK path! stderr was " + err)
-        if exit_code == 0 and out:
-            sdk_path = out.strip()
-            self.full_config.lit_config.note('using SDKROOT: %r' % sdk_path)
-            assert isinstance(sdk_path, str)
-            flags += ["-isysroot", sdk_path]
-
-    def add_cxx_link_flags(self, flags):
-        flags += ['-lSystem']
-
-    def configure_env(self, env):
-        library_paths = []
-        # Configure the library path for libc++
-        if self.full_config.cxx_runtime_root:
-            library_paths += [self.full_config.cxx_runtime_root]
-        elif self.full_config.use_system_cxx_lib:
-            if (os.path.isdir(str(self.full_config.use_system_cxx_lib))):
-                library_paths += [self.full_config.use_system_cxx_lib]
-
-        # Configure the abi library path
-        if self.full_config.abi_library_root:
-            library_paths += [self.full_config.abi_library_root]
-        if library_paths:
-            env['DYLD_LIBRARY_PATH'] = ':'.join(library_paths)
-
-    def allow_cxxabi_link(self):
-        # Don't link libc++abi explicitly on OS X because the symbols
-        # should be available in libc++ directly.
-        return False
-
-
-class FreeBSDLocalTI(DefaultTargetInfo):
-    def __init__(self, full_config):
-        super(FreeBSDLocalTI, self).__init__(full_config)
-
-    def add_locale_features(self, features):
-        add_common_locales(features, self.full_config.lit_config)
-
-    def add_cxx_link_flags(self, flags):
-        flags += ['-lc', '-lm', '-lpthread', '-lgcc_s', '-lcxxrt']
-
-
-class NetBSDLocalTI(DefaultTargetInfo):
-    def __init__(self, full_config):
-        super(NetBSDLocalTI, self).__init__(full_config)
-
-    def add_locale_features(self, features):
-        add_common_locales(features, self.full_config.lit_config)
-
-    def add_cxx_link_flags(self, flags):
-        flags += ['-lc', '-lm', '-lpthread', '-lgcc_s', '-lc++abi',
-                  '-lunwind']
-
-
-class LinuxLocalTI(DefaultTargetInfo):
-    def __init__(self, full_config):
-        super(LinuxLocalTI, self).__init__(full_config)
-
-    def platform(self):
-        return 'linux'
-
-    def _distribution(self):
-        try:
-            # linux_distribution is not available since Python 3.8
-            # However, this function is only used to detect SLES 11,
-            # which is quite an old distribution that doesn't have
-            # Python 3.8.
-            return platform.linux_distribution()
-        except AttributeError:
-            return '', '', ''
-
-    def platform_name(self):
-        name, _, _ = self._distribution()
-        # Some distros have spaces, e.g. 'SUSE Linux Enterprise Server'
-        # lit features can't have spaces
-        name = name.lower().strip().replace(' ', '-')
-        return name # Permitted to be None
-
-    def platform_ver(self):
-        _, ver, _ = self._distribution()
-        ver = ver.lower().strip().replace(' ', '-')
-        return ver # Permitted to be None.
-
-    def add_locale_features(self, features):
-        add_common_locales(features, self.full_config.lit_config)
-        # Some linux distributions have different locale data than others.
-        # Insert the distributions name and name-version into the available
-        # features to allow tests to XFAIL on them.
-        name = self.platform_name()
-        ver = self.platform_ver()
-        if name:
-            features.add(name)
-        if name and ver:
-            features.add('%s-%s' % (name, ver))
-
-    def add_cxx_compile_flags(self, flags):
-        flags += ['-D__STDC_FORMAT_MACROS',
-                  '-D__STDC_LIMIT_MACROS',
-                  '-D__STDC_CONSTANT_MACROS']
-
-    def add_cxx_link_flags(self, flags):
-        enable_threads = ('libcpp-has-no-threads' not in
-                          self.full_config.config.available_features)
-        llvm_unwinder = self.full_config.get_lit_bool('llvm_unwinder', False)
-        shared_libcxx = self.full_config.get_lit_bool('enable_shared', True)
-        flags += ['-lm']
-        if not llvm_unwinder:
-            flags += ['-lgcc_s', '-lgcc']
-        if enable_threads:
-            flags += ['-lpthread']
-            if not shared_libcxx:
-                flags += ['-lrt']
-        flags += ['-lc']
-        if llvm_unwinder:
-            flags += ['-lunwind', '-ldl']
-        else:
-            flags += ['-lgcc_s']
-        builtins_lib = self.full_config.get_lit_conf('builtins_library')
-        if builtins_lib:
-            flags += [builtins_lib]
-        else:
-            flags += ['-lgcc']
-        use_libatomic = self.full_config.get_lit_bool('use_libatomic', False)
-        if use_libatomic:
-            flags += ['-latomic']
-        san = self.full_config.get_lit_conf('use_sanitizer', '').strip()
-        if san:
-            # The libraries and their order are taken from the
-            # linkSanitizerRuntimeDeps function in
-            # clang/lib/Driver/Tools.cpp
-            flags += ['-lpthread', '-lrt', '-lm', '-ldl']
-
-
-class WindowsLocalTI(DefaultTargetInfo):
-    def __init__(self, full_config):
-        super(WindowsLocalTI, self).__init__(full_config)
-
-    def add_locale_features(self, features):
-        add_common_locales(features, self.full_config.lit_config,
-                           is_windows=True)
-
-    def use_lit_shell_default(self):
-        # Default to the internal shell on Windows, as bash on Windows is
-        # usually very slow.
-        return True
-
-
-def make_target_info(full_config):
-    default = "libcxx.test.target_info.LocalTI"
-    info_str = full_config.get_lit_conf('target_info', default)
-    if info_str != default:
-        mod_path, _, info = info_str.rpartition('.')
-        mod = importlib.import_module(mod_path)
-        target_info = getattr(mod, info)(full_config)
-        full_config.lit_config.note("inferred target_info as: %r" % info_str)
-        return target_info
-    target_system = platform.system()
-    if target_system == 'Darwin':  return DarwinLocalTI(full_config)
-    if target_system == 'FreeBSD': return FreeBSDLocalTI(full_config)
-    if target_system == 'NetBSD':  return NetBSDLocalTI(full_config)
-    if target_system == 'Linux':   return LinuxLocalTI(full_config)
-    if target_system == 'Windows': return WindowsLocalTI(full_config)
-    return DefaultTargetInfo(full_config)
diff --git a/gnu/llvm/libcxx/utils/libcxx/util.py b/gnu/llvm/libcxx/utils/libcxx/util.py
deleted file mode 100644
index 2fd95232abb..00000000000
--- a/gnu/llvm/libcxx/utils/libcxx/util.py
+++ /dev/null
@@ -1,288 +0,0 @@
-#===----------------------------------------------------------------------===##
-#
-# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-# See https://llvm.org/LICENSE.txt for license information.
-# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-#
-#===----------------------------------------------------------------------===##
-
-from contextlib import contextmanager
-import errno
-import os
-import platform
-import signal
-import subprocess
-import sys
-import tempfile
-import threading
-
-
-# FIXME: Most of these functions are cribbed from LIT
-def to_bytes(str):
-    # Encode to UTF-8 to get binary data.
-    if isinstance(str, bytes):
-        return str
-    return str.encode('utf-8')
-
-def to_string(bytes):
-    if isinstance(bytes, str):
-        return bytes
-    return to_bytes(bytes)
-
-def convert_string(bytes):
-    try:
-        return to_string(bytes.decode('utf-8'))
-    except AttributeError: # 'str' object has no attribute 'decode'.
-        return str(bytes)
-    except UnicodeError:
-        return str(bytes)
-
-
-def cleanFile(filename):
-    try:
-        os.remove(filename)
-    except OSError:
-        pass
-
-
-@contextmanager
-def guardedTempFilename(suffix='', prefix='', dir=None):
-    # Creates and yeilds a temporary filename within a with statement. The file
-    # is removed upon scope exit.
-    handle, name = tempfile.mkstemp(suffix=suffix, prefix=prefix, dir=dir)
-    os.close(handle)
-    yield name
-    cleanFile(name)
-
-
-@contextmanager
-def guardedFilename(name):
-    # yeilds a filename within a with statement. The file is removed upon scope
-    # exit.
-    yield name
-    cleanFile(name)
-
-
-@contextmanager
-def nullContext(value):
-    # yeilds a variable within a with statement. No action is taken upon scope
-    # exit.
-    yield value
-
-
-def makeReport(cmd, out, err, rc):
-    report = "Command: %s\n" % cmd
-    report += "Exit Code: %d\n" % rc
-    if out:
-        report += "Standard Output:\n--\n%s--\n" % out
-    if err:
-        report += "Standard Error:\n--\n%s--\n" % err
-    report += '\n'
-    return report
-
-
-def capture(args, env=None):
-    """capture(command) - Run the given command (or argv list) in a shell and
-    return the standard output. Raises a CalledProcessError if the command
-    exits with a non-zero status."""
-    p = subprocess.Popen(args, stdout=subprocess.PIPE, stderr=subprocess.PIPE,
-                         env=env)
-    out, err = p.communicate()
-    out = convert_string(out)
-    err = convert_string(err)
-    if p.returncode != 0:
-        raise subprocess.CalledProcessError(cmd=args,
-                                            returncode=p.returncode,
-                                            output="{}\n{}".format(out, err))
-    return out
-
-
-def which(command, paths = None):
-    """which(command, [paths]) - Look up the given command in the paths string
-    (or the PATH environment variable, if unspecified)."""
-
-    if paths is None:
-        paths = os.environ.get('PATH','')
-
-    # Check for absolute match first.
-    if os.path.isfile(command):
-        return command
-
-    # Would be nice if Python had a lib function for this.
-    if not paths:
-        paths = os.defpath
-
-    # Get suffixes to search.
-    # On Cygwin, 'PATHEXT' may exist but it should not be used.
-    if os.pathsep == ';':
-        pathext = os.environ.get('PATHEXT', '').split(';')
-    else:
-        pathext = ['']
-
-    # Search the paths...
-    for path in paths.split(os.pathsep):
-        for ext in pathext:
-            p = os.path.join(path, command + ext)
-            if os.path.exists(p) and not os.path.isdir(p):
-                return p
-
-    return None
-
-
-def checkToolsPath(dir, tools):
-    for tool in tools:
-        if not os.path.exists(os.path.join(dir, tool)):
-            return False
-    return True
-
-
-def whichTools(tools, paths):
-    for path in paths.split(os.pathsep):
-        if checkToolsPath(path, tools):
-            return path
-    return None
-
-def mkdir_p(path):
-    """mkdir_p(path) - Make the "path" directory, if it does not exist; this
-    will also make directories for any missing parent directories."""
-    if not path or os.path.exists(path):
-        return
-
-    parent = os.path.dirname(path)
-    if parent != path:
-        mkdir_p(parent)
-
-    try:
-        os.mkdir(path)
-    except OSError:
-        e = sys.exc_info()[1]
-        # Ignore EEXIST, which may occur during a race condition.
-        if e.errno != errno.EEXIST:
-            raise
-
-
-class ExecuteCommandTimeoutException(Exception):
-    def __init__(self, msg, out, err, exitCode):
-        assert isinstance(msg, str)
-        assert isinstance(out, str)
-        assert isinstance(err, str)
-        assert isinstance(exitCode, int)
-        self.msg = msg
-        self.out = out
-        self.err = err
-        self.exitCode = exitCode
-
-# Close extra file handles on UNIX (on Windows this cannot be done while
-# also redirecting input).
-kUseCloseFDs = not (platform.system() == 'Windows')
-def executeCommand(command, cwd=None, env=None, input=None, timeout=0):
-    """
-        Execute command ``command`` (list of arguments or string)
-        with
-        * working directory ``cwd`` (str), use None to use the current
-          working directory
-        * environment ``env`` (dict), use None for none
-        * Input to the command ``input`` (str), use string to pass
-          no input.
-        * Max execution time ``timeout`` (int) seconds. Use 0 for no timeout.
-
-        Returns a tuple (out, err, exitCode) where
-        * ``out`` (str) is the standard output of running the command
-        * ``err`` (str) is the standard error of running the command
-        * ``exitCode`` (int) is the exitCode of running the command
-
-        If the timeout is hit an ``ExecuteCommandTimeoutException``
-        is raised.
-    """
-    if input is not None:
-        input = to_bytes(input)
-    p = subprocess.Popen(command, cwd=cwd,
-                         stdin=subprocess.PIPE,
-                         stdout=subprocess.PIPE,
-                         stderr=subprocess.PIPE,
-                         env=env, close_fds=kUseCloseFDs)
-    timerObject = None
-    # FIXME: Because of the way nested function scopes work in Python 2.x we
-    # need to use a reference to a mutable object rather than a plain
-    # bool. In Python 3 we could use the "nonlocal" keyword but we need
-    # to support Python 2 as well.
-    hitTimeOut = [False]
-    try:
-        if timeout > 0:
-            def killProcess():
-                # We may be invoking a shell so we need to kill the
-                # process and all its children.
-                hitTimeOut[0] = True
-                killProcessAndChildren(p.pid)
-
-            timerObject = threading.Timer(timeout, killProcess)
-            timerObject.start()
-
-        out,err = p.communicate(input=input)
-        exitCode = p.wait()
-    finally:
-        if timerObject != None:
-            timerObject.cancel()
-
-    # Ensure the resulting output is always of string type.
-    out = convert_string(out)
-    err = convert_string(err)
-
-    if hitTimeOut[0]:
-        raise ExecuteCommandTimeoutException(
-            msg='Reached timeout of {} seconds'.format(timeout),
-            out=out,
-            err=err,
-            exitCode=exitCode
-            )
-
-    # Detect Ctrl-C in subprocess.
-    if exitCode == -signal.SIGINT:
-        raise KeyboardInterrupt
-
-    return out, err, exitCode
-
-
-def killProcessAndChildren(pid):
-    """
-    This function kills a process with ``pid`` and all its
-    running children (recursively). It is currently implemented
-    using the psutil module which provides a simple platform
-    neutral implementation.
-
-    TODO: Reimplement this without using psutil so we can
-          remove our dependency on it.
-    """
-    if platform.system() == 'AIX':
-        subprocess.call('kill -kill $(ps -o pid= -L{})'.format(pid), shell=True)
-    else:
-        import psutil
-        try:
-            psutilProc = psutil.Process(pid)
-            # Handle the different psutil API versions
-            try:
-                # psutil >= 2.x
-                children_iterator = psutilProc.children(recursive=True)
-            except AttributeError:
-                # psutil 1.x
-                children_iterator = psutilProc.get_children(recursive=True)
-            for child in children_iterator:
-                try:
-                    child.kill()
-                except psutil.NoSuchProcess:
-                    pass
-            psutilProc.kill()
-        except psutil.NoSuchProcess:
-            pass
-
-
-def executeCommandVerbose(cmd, *args, **kwargs):
-    """
-    Execute a command and print its output on failure.
-    """
-    out, err, exitCode = executeCommand(cmd, *args, **kwargs)
-    if exitCode != 0:
-        report = makeReport(cmd, out, err, exitCode)
-        report += "\n\nFailed!"
-        sys.stderr.write('%s\n' % report)
-    return out, err, exitCode
diff --git a/gnu/llvm/libcxx/utils/merge_archives.py b/gnu/llvm/libcxx/utils/merge_archives.py
deleted file mode 100755
index 4c31854d2b7..00000000000
--- a/gnu/llvm/libcxx/utils/merge_archives.py
+++ /dev/null
@@ -1,155 +0,0 @@
-#!/usr/bin/env python
-#===----------------------------------------------------------------------===##
-#
-# Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-# See https://llvm.org/LICENSE.txt for license information.
-# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-#
-#===----------------------------------------------------------------------===##
-
-from argparse import ArgumentParser
-from ctypes.util import find_library
-import distutils.spawn
-import glob
-import tempfile
-import os
-import shutil
-import subprocess
-import signal
-import sys
-
-temp_directory_root = None
-def exit_with_cleanups(status):
-    if temp_directory_root is not None:
-        shutil.rmtree(temp_directory_root)
-    sys.exit(status)
-
-def print_and_exit(msg):
-    sys.stderr.write(msg + '\n')
-    exit_with_cleanups(1)
-
-def find_and_diagnose_missing(lib, search_paths):
-    if os.path.exists(lib):
-        return os.path.abspath(lib)
-    if not lib.startswith('lib') or not lib.endswith('.a'):
-        print_and_exit(("input file '%s' not not name a static library. "
-                       "It should start with 'lib' and end with '.a") % lib)
-    for sp in search_paths:
-        assert type(sp) is list and len(sp) == 1
-        path = os.path.join(sp[0], lib)
-        if os.path.exists(path):
-            return os.path.abspath(path)
-    print_and_exit("input '%s' does not exist" % lib)
-
-
-def execute_command(cmd, cwd=None):
-    """
-    Execute a command, capture and return its output.
-    """
-    kwargs = {
-        'stdin': subprocess.PIPE,
-        'stdout': subprocess.PIPE,
-        'stderr': subprocess.PIPE,
-        'cwd': cwd,
-        'universal_newlines': True
-    }
-    p = subprocess.Popen(cmd, **kwargs)
-    out, err = p.communicate()
-    exitCode = p.wait()
-    if exitCode == -signal.SIGINT:
-        raise KeyboardInterrupt
-    return out, err, exitCode
-
-
-def execute_command_verbose(cmd, cwd=None, verbose=False):
-    """
-    Execute a command and print its output on failure.
-    """
-    out, err, exitCode = execute_command(cmd, cwd=cwd)
-    if exitCode != 0 or verbose:
-        report = "Command: %s\n" % ' '.join(["'%s'" % a for a in cmd])
-        if exitCode != 0:
-            report += "Exit Code: %d\n" % exitCode
-        if out:
-            report += "Standard Output:\n--\n%s--" % out
-        if err:
-            report += "Standard Error:\n--\n%s--" % err
-        if exitCode != 0:
-            report += "\n\nFailed!"
-        sys.stderr.write('%s\n' % report)
-        if exitCode != 0:
-            exit_with_cleanups(exitCode)
-    return out
-
-def main():
-    parser = ArgumentParser(
-        description="Merge multiple archives into a single library")
-    parser.add_argument(
-        '-v', '--verbose', dest='verbose', action='store_true', default=False)
-    parser.add_argument(
-        '-o', '--output', dest='output', required=True,
-        help='The output file. stdout is used if not given',
-        type=str, action='store')
-    parser.add_argument(
-        '-L', dest='search_paths',
-        help='Paths to search for the libraries along', action='append',
-        nargs=1)
-    parser.add_argument(
-        '--ar', dest='ar_exe', required=False,
-        help='The ar executable to use, finds \'ar\' in the path if not given',
-        type=str, action='store')
-    parser.add_argument(
-        '--use-libtool', dest='use_libtool', action='store_true', default=False)
-    parser.add_argument(
-        '--libtool', dest='libtool_exe', required=False,
-        help='The libtool executable to use, finds \'libtool\' in the path if not given',
-        type=str, action='store')
-    parser.add_argument(
-        'archives', metavar='archives',  nargs='+',
-        help='The archives to merge')
-
-    args = parser.parse_args()
-
-    ar_exe = args.ar_exe
-    if not ar_exe:
-        ar_exe = distutils.spawn.find_executable('ar')
-    if not ar_exe:
-        print_and_exit("failed to find 'ar' executable")
-
-    if args.use_libtool:
-        libtool_exe = args.libtool_exe
-        if not libtool_exe:
-            libtool_exe = distutils.spawn.find_executable('libtool')
-        if not libtool_exe:
-            print_and_exit("failed to find 'libtool' executable")
-
-    if len(args.archives) < 2:
-        print_and_exit('fewer than 2 inputs provided')
-    archives = [find_and_diagnose_missing(ar, args.search_paths)
-                for ar in args.archives]
-    print ('Merging archives: %s' % archives)
-    if not os.path.exists(os.path.dirname(args.output)):
-        print_and_exit("output path doesn't exist: '%s'" % args.output)
-
-    global temp_directory_root
-    temp_directory_root = tempfile.mkdtemp('.libcxx.merge.archives')
-
-    files = []
-    for arc in archives:
-        execute_command_verbose([ar_exe, 'x', arc],
-                                cwd=temp_directory_root, verbose=args.verbose)
-        out = execute_command_verbose([ar_exe, 't', arc])
-        files.extend(out.splitlines())
-
-    if args.use_libtool:
-        files = [f for f in files if not f.startswith('__.SYMDEF')]
-        execute_command_verbose([libtool_exe, '-static', '-o', args.output] + files,
-                                cwd=temp_directory_root, verbose=args.verbose)
-    else:
-        execute_command_verbose([ar_exe, 'rcs', args.output] + files,
-                                cwd=temp_directory_root, verbose=args.verbose)
-
-
-if __name__ == '__main__':
-    main()
-    exit_with_cleanups(0)