Use the space freed up by sparc and zaurus to import LLVM.

ok hackroom@

1 files changed, 730 insertions, 0 deletions

diff --git a/gnu/llvm/lib/MC/MCStreamer.cpp b/gnu/llvm/lib/MC/MCStreamer.cpp
new file mode 100644
index 00000000000..836b4054464
--- /dev/null
+++ b/gnu/llvm/lib/MC/MCStreamer.cpp
@@ -0,0 +1,730 @@
+//===- lib/MC/MCStreamer.cpp - Streaming Machine Code Output --------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/MC/MCStreamer.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/Twine.h"
+#include "llvm/MC/MCAsmBackend.h"
+#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCInst.h"
+#include "llvm/MC/MCInstPrinter.h"
+#include "llvm/MC/MCObjectFileInfo.h"
+#include "llvm/MC/MCObjectWriter.h"
+#include "llvm/MC/MCSection.h"
+#include "llvm/MC/MCSymbol.h"
+#include "llvm/MC/MCWin64EH.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/LEB128.h"
+#include "llvm/Support/raw_ostream.h"
+#include <cstdlib>
+using namespace llvm;
+
+// Pin the vtables to this file.
+MCTargetStreamer::~MCTargetStreamer() {}
+
+MCTargetStreamer::MCTargetStreamer(MCStreamer &S) : Streamer(S) {
+  S.setTargetStreamer(this);
+}
+
+void MCTargetStreamer::emitLabel(MCSymbol *Symbol) {}
+
+void MCTargetStreamer::finish() {}
+
+void MCTargetStreamer::emitAssignment(MCSymbol *Symbol, const MCExpr *Value) {}
+
+MCStreamer::MCStreamer(MCContext &Ctx)
+    : Context(Ctx), CurrentWinFrameInfo(nullptr) {
+  SectionStack.push_back(std::pair<MCSectionSubPair, MCSectionSubPair>());
+}
+
+MCStreamer::~MCStreamer() {
+  for (unsigned i = 0; i < getNumWinFrameInfos(); ++i)
+    delete WinFrameInfos[i];
+}
+
+void MCStreamer::reset() {
+  DwarfFrameInfos.clear();
+  for (unsigned i = 0; i < getNumWinFrameInfos(); ++i)
+    delete WinFrameInfos[i];
+  WinFrameInfos.clear();
+  CurrentWinFrameInfo = nullptr;
+  SymbolOrdering.clear();
+  SectionStack.clear();
+  SectionStack.push_back(std::pair<MCSectionSubPair, MCSectionSubPair>());
+}
+
+raw_ostream &MCStreamer::GetCommentOS() {
+  // By default, discard comments.
+  return nulls();
+}
+
+void MCStreamer::emitRawComment(const Twine &T, bool TabPrefix) {}
+
+void MCStreamer::generateCompactUnwindEncodings(MCAsmBackend *MAB) {
+  for (auto &FI : DwarfFrameInfos)
+    FI.CompactUnwindEncoding =
+        (MAB ? MAB->generateCompactUnwindEncoding(FI.Instructions) : 0);
+}
+
+/// EmitIntValue - Special case of EmitValue that avoids the client having to
+/// pass in a MCExpr for constant integers.
+void MCStreamer::EmitIntValue(uint64_t Value, unsigned Size) {
+  assert(1 <= Size && Size <= 8 && "Invalid size");
+  assert((isUIntN(8 * Size, Value) || isIntN(8 * Size, Value)) &&
+         "Invalid size");
+  char buf[8];
+  const bool isLittleEndian = Context.getAsmInfo()->isLittleEndian();
+  for (unsigned i = 0; i != Size; ++i) {
+    unsigned index = isLittleEndian ? i : (Size - i - 1);
+    buf[i] = uint8_t(Value >> (index * 8));
+  }
+  EmitBytes(StringRef(buf, Size));
+}
+
+/// EmitULEB128Value - Special case of EmitULEB128Value that avoids the
+/// client having to pass in a MCExpr for constant integers.
+void MCStreamer::EmitULEB128IntValue(uint64_t Value, unsigned Padding) {
+  SmallString<128> Tmp;
+  raw_svector_ostream OSE(Tmp);
+  encodeULEB128(Value, OSE, Padding);
+  EmitBytes(OSE.str());
+}
+
+/// EmitSLEB128Value - Special case of EmitSLEB128Value that avoids the
+/// client having to pass in a MCExpr for constant integers.
+void MCStreamer::EmitSLEB128IntValue(int64_t Value) {
+  SmallString<128> Tmp;
+  raw_svector_ostream OSE(Tmp);
+  encodeSLEB128(Value, OSE);
+  EmitBytes(OSE.str());
+}
+
+void MCStreamer::EmitValue(const MCExpr *Value, unsigned Size, SMLoc Loc) {
+  EmitValueImpl(Value, Size, Loc);
+}
+
+void MCStreamer::EmitSymbolValue(const MCSymbol *Sym, unsigned Size,
+                                 bool IsSectionRelative) {
+  assert((!IsSectionRelative || Size == 4) &&
+         "SectionRelative value requires 4-bytes");
+
+  if (!IsSectionRelative)
+    EmitValueImpl(MCSymbolRefExpr::create(Sym, getContext()), Size);
+  else
+    EmitCOFFSecRel32(Sym);
+}
+
+void MCStreamer::EmitGPRel64Value(const MCExpr *Value) {
+  report_fatal_error("unsupported directive in streamer");
+}
+
+void MCStreamer::EmitGPRel32Value(const MCExpr *Value) {
+  report_fatal_error("unsupported directive in streamer");
+}
+
+/// EmitFill - Emit NumBytes bytes worth of the value specified by
+/// FillValue.  This implements directives such as '.space'.
+void MCStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue) {
+  const MCExpr *E = MCConstantExpr::create(FillValue, getContext());
+  for (uint64_t i = 0, e = NumBytes; i != e; ++i)
+    EmitValue(E, 1);
+}
+
+/// The implementation in this class just redirects to EmitFill.
+void MCStreamer::EmitZeros(uint64_t NumBytes) {
+  EmitFill(NumBytes, 0);
+}
+
+unsigned MCStreamer::EmitDwarfFileDirective(unsigned FileNo,
+                                            StringRef Directory,
+                                            StringRef Filename, unsigned CUID) {
+  return getContext().getDwarfFile(Directory, Filename, FileNo, CUID);
+}
+
+void MCStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
+                                       unsigned Column, unsigned Flags,
+                                       unsigned Isa,
+                                       unsigned Discriminator,
+                                       StringRef FileName) {
+  getContext().setCurrentDwarfLoc(FileNo, Line, Column, Flags, Isa,
+                                  Discriminator);
+}
+
+MCSymbol *MCStreamer::getDwarfLineTableSymbol(unsigned CUID) {
+  MCDwarfLineTable &Table = getContext().getMCDwarfLineTable(CUID);
+  if (!Table.getLabel()) {
+    StringRef Prefix = Context.getAsmInfo()->getPrivateGlobalPrefix();
+    Table.setLabel(
+        Context.getOrCreateSymbol(Prefix + "line_table_start" + Twine(CUID)));
+  }
+  return Table.getLabel();
+}
+
+MCDwarfFrameInfo *MCStreamer::getCurrentDwarfFrameInfo() {
+  if (DwarfFrameInfos.empty())
+    return nullptr;
+  return &DwarfFrameInfos.back();
+}
+
+void MCStreamer::EnsureValidDwarfFrame() {
+  MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+  if (!CurFrame || CurFrame->End)
+    report_fatal_error("No open frame");
+}
+
+void MCStreamer::EmitEHSymAttributes(const MCSymbol *Symbol,
+                                     MCSymbol *EHSymbol) {
+}
+
+void MCStreamer::InitSections(bool NoExecStack) {
+  SwitchSection(getContext().getObjectFileInfo()->getTextSection());
+}
+
+void MCStreamer::AssignFragment(MCSymbol *Symbol, MCFragment *Fragment) {
+  assert(Fragment);
+  Symbol->setFragment(Fragment);
+
+  // As we emit symbols into a section, track the order so that they can
+  // be sorted upon later. Zero is reserved to mean 'unemitted'.
+  SymbolOrdering[Symbol] = 1 + SymbolOrdering.size();
+}
+
+void MCStreamer::EmitLabel(MCSymbol *Symbol) {
+  assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
+  assert(getCurrentSection().first && "Cannot emit before setting section!");
+  assert(!Symbol->getFragment() && "Unexpected fragment on symbol data!");
+  Symbol->setFragment(&getCurrentSectionOnly()->getDummyFragment());
+
+  MCTargetStreamer *TS = getTargetStreamer();
+  if (TS)
+    TS->emitLabel(Symbol);
+}
+
+void MCStreamer::EmitCFISections(bool EH, bool Debug) {
+  assert(EH || Debug);
+}
+
+void MCStreamer::EmitCFIStartProc(bool IsSimple) {
+  MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+  if (CurFrame && !CurFrame->End)
+    report_fatal_error("Starting a frame before finishing the previous one!");
+
+  MCDwarfFrameInfo Frame;
+  Frame.IsSimple = IsSimple;
+  EmitCFIStartProcImpl(Frame);
+
+  const MCAsmInfo* MAI = Context.getAsmInfo();
+  if (MAI) {
+    for (const MCCFIInstruction& Inst : MAI->getInitialFrameState()) {
+      if (Inst.getOperation() == MCCFIInstruction::OpDefCfa ||
+          Inst.getOperation() == MCCFIInstruction::OpDefCfaRegister) {
+        Frame.CurrentCfaRegister = Inst.getRegister();
+      }
+    }
+  }
+
+  DwarfFrameInfos.push_back(Frame);
+}
+
+void MCStreamer::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) {
+}
+
+void MCStreamer::EmitCFIEndProc() {
+  EnsureValidDwarfFrame();
+  MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+  EmitCFIEndProcImpl(*CurFrame);
+}
+
+void MCStreamer::EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) {
+  // Put a dummy non-null value in Frame.End to mark that this frame has been
+  // closed.
+  Frame.End = (MCSymbol *) 1;
+}
+
+MCSymbol *MCStreamer::EmitCFICommon() {
+  EnsureValidDwarfFrame();
+  MCSymbol *Label = getContext().createTempSymbol();
+  EmitLabel(Label);
+  return Label;
+}
+
+void MCStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) {
+  MCSymbol *Label = EmitCFICommon();
+  MCCFIInstruction Instruction =
+    MCCFIInstruction::createDefCfa(Label, Register, Offset);
+  MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+  CurFrame->Instructions.push_back(Instruction);
+  CurFrame->CurrentCfaRegister = static_cast<unsigned>(Register);
+}
+
+void MCStreamer::EmitCFIDefCfaOffset(int64_t Offset) {
+  MCSymbol *Label = EmitCFICommon();
+  MCCFIInstruction Instruction =
+    MCCFIInstruction::createDefCfaOffset(Label, Offset);
+  MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+  CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIAdjustCfaOffset(int64_t Adjustment) {
+  MCSymbol *Label = EmitCFICommon();
+  MCCFIInstruction Instruction =
+    MCCFIInstruction::createAdjustCfaOffset(Label, Adjustment);
+  MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+  CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIDefCfaRegister(int64_t Register) {
+  MCSymbol *Label = EmitCFICommon();
+  MCCFIInstruction Instruction =
+    MCCFIInstruction::createDefCfaRegister(Label, Register);
+  MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+  CurFrame->Instructions.push_back(Instruction);
+  CurFrame->CurrentCfaRegister = static_cast<unsigned>(Register);
+}
+
+void MCStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) {
+  MCSymbol *Label = EmitCFICommon();
+  MCCFIInstruction Instruction =
+    MCCFIInstruction::createOffset(Label, Register, Offset);
+  MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+  CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIRelOffset(int64_t Register, int64_t Offset) {
+  MCSymbol *Label = EmitCFICommon();
+  MCCFIInstruction Instruction =
+    MCCFIInstruction::createRelOffset(Label, Register, Offset);
+  MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+  CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIPersonality(const MCSymbol *Sym,
+                                    unsigned Encoding) {
+  EnsureValidDwarfFrame();
+  MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+  CurFrame->Personality = Sym;
+  CurFrame->PersonalityEncoding = Encoding;
+}
+
+void MCStreamer::EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) {
+  EnsureValidDwarfFrame();
+  MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+  CurFrame->Lsda = Sym;
+  CurFrame->LsdaEncoding = Encoding;
+}
+
+void MCStreamer::EmitCFIRememberState() {
+  MCSymbol *Label = EmitCFICommon();
+  MCCFIInstruction Instruction = MCCFIInstruction::createRememberState(Label);
+  MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+  CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIRestoreState() {
+  // FIXME: Error if there is no matching cfi_remember_state.
+  MCSymbol *Label = EmitCFICommon();
+  MCCFIInstruction Instruction = MCCFIInstruction::createRestoreState(Label);
+  MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+  CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFISameValue(int64_t Register) {
+  MCSymbol *Label = EmitCFICommon();
+  MCCFIInstruction Instruction =
+    MCCFIInstruction::createSameValue(Label, Register);
+  MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+  CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIRestore(int64_t Register) {
+  MCSymbol *Label = EmitCFICommon();
+  MCCFIInstruction Instruction =
+    MCCFIInstruction::createRestore(Label, Register);
+  MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+  CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIEscape(StringRef Values) {
+  MCSymbol *Label = EmitCFICommon();
+  MCCFIInstruction Instruction = MCCFIInstruction::createEscape(Label, Values);
+  MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+  CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIGnuArgsSize(int64_t Size) {
+  MCSymbol *Label = EmitCFICommon();
+  MCCFIInstruction Instruction = 
+    MCCFIInstruction::createGnuArgsSize(Label, Size);
+  MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+  CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFISignalFrame() {
+  EnsureValidDwarfFrame();
+  MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+  CurFrame->IsSignalFrame = true;
+}
+
+void MCStreamer::EmitCFIUndefined(int64_t Register) {
+  MCSymbol *Label = EmitCFICommon();
+  MCCFIInstruction Instruction =
+    MCCFIInstruction::createUndefined(Label, Register);
+  MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+  CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIRegister(int64_t Register1, int64_t Register2) {
+  MCSymbol *Label = EmitCFICommon();
+  MCCFIInstruction Instruction =
+    MCCFIInstruction::createRegister(Label, Register1, Register2);
+  MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+  CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIWindowSave() {
+  MCSymbol *Label = EmitCFICommon();
+  MCCFIInstruction Instruction =
+    MCCFIInstruction::createWindowSave(Label);
+  MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+  CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EnsureValidWinFrameInfo() {
+  const MCAsmInfo *MAI = Context.getAsmInfo();
+  if (!MAI->usesWindowsCFI())
+    report_fatal_error(".seh_* directives are not supported on this target");
+  if (!CurrentWinFrameInfo || CurrentWinFrameInfo->End)
+    report_fatal_error("No open Win64 EH frame function!");
+}
+
+void MCStreamer::EmitWinCFIStartProc(const MCSymbol *Symbol) {
+  const MCAsmInfo *MAI = Context.getAsmInfo();
+  if (!MAI->usesWindowsCFI())
+    report_fatal_error(".seh_* directives are not supported on this target");
+  if (CurrentWinFrameInfo && !CurrentWinFrameInfo->End)
+    report_fatal_error("Starting a function before ending the previous one!");
+
+  MCSymbol *StartProc = getContext().createTempSymbol();
+  EmitLabel(StartProc);
+
+  WinFrameInfos.push_back(new WinEH::FrameInfo(Symbol, StartProc));
+  CurrentWinFrameInfo = WinFrameInfos.back();
+}
+
+void MCStreamer::EmitWinCFIEndProc() {
+  EnsureValidWinFrameInfo();
+  if (CurrentWinFrameInfo->ChainedParent)
+    report_fatal_error("Not all chained regions terminated!");
+
+  MCSymbol *Label = getContext().createTempSymbol();
+  EmitLabel(Label);
+  CurrentWinFrameInfo->End = Label;
+}
+
+void MCStreamer::EmitWinCFIStartChained() {
+  EnsureValidWinFrameInfo();
+
+  MCSymbol *StartProc = getContext().createTempSymbol();
+  EmitLabel(StartProc);
+
+  WinFrameInfos.push_back(new WinEH::FrameInfo(CurrentWinFrameInfo->Function,
+                                               StartProc, CurrentWinFrameInfo));
+  CurrentWinFrameInfo = WinFrameInfos.back();
+}
+
+void MCStreamer::EmitWinCFIEndChained() {
+  EnsureValidWinFrameInfo();
+  if (!CurrentWinFrameInfo->ChainedParent)
+    report_fatal_error("End of a chained region outside a chained region!");
+
+  MCSymbol *Label = getContext().createTempSymbol();
+  EmitLabel(Label);
+
+  CurrentWinFrameInfo->End = Label;
+  CurrentWinFrameInfo =
+      const_cast<WinEH::FrameInfo *>(CurrentWinFrameInfo->ChainedParent);
+}
+
+void MCStreamer::EmitWinEHHandler(const MCSymbol *Sym, bool Unwind,
+                                  bool Except) {
+  EnsureValidWinFrameInfo();
+  if (CurrentWinFrameInfo->ChainedParent)
+    report_fatal_error("Chained unwind areas can't have handlers!");
+  CurrentWinFrameInfo->ExceptionHandler = Sym;
+  if (!Except && !Unwind)
+    report_fatal_error("Don't know what kind of handler this is!");
+  if (Unwind)
+    CurrentWinFrameInfo->HandlesUnwind = true;
+  if (Except)
+    CurrentWinFrameInfo->HandlesExceptions = true;
+}
+
+void MCStreamer::EmitWinEHHandlerData() {
+  EnsureValidWinFrameInfo();
+  if (CurrentWinFrameInfo->ChainedParent)
+    report_fatal_error("Chained unwind areas can't have handlers!");
+}
+
+void MCStreamer::EmitSyntaxDirective() {}
+
+void MCStreamer::EmitWinCFIPushReg(unsigned Register) {
+  EnsureValidWinFrameInfo();
+
+  MCSymbol *Label = getContext().createTempSymbol();
+  EmitLabel(Label);
+
+  WinEH::Instruction Inst = Win64EH::Instruction::PushNonVol(Label, Register);
+  CurrentWinFrameInfo->Instructions.push_back(Inst);
+}
+
+void MCStreamer::EmitWinCFISetFrame(unsigned Register, unsigned Offset) {
+  EnsureValidWinFrameInfo();
+  if (CurrentWinFrameInfo->LastFrameInst >= 0)
+    report_fatal_error("Frame register and offset already specified!");
+  if (Offset & 0x0F)
+    report_fatal_error("Misaligned frame pointer offset!");
+  if (Offset > 240)
+    report_fatal_error("Frame offset must be less than or equal to 240!");
+
+  MCSymbol *Label = getContext().createTempSymbol();
+  EmitLabel(Label);
+
+  WinEH::Instruction Inst =
+      Win64EH::Instruction::SetFPReg(Label, Register, Offset);
+  CurrentWinFrameInfo->LastFrameInst = CurrentWinFrameInfo->Instructions.size();
+  CurrentWinFrameInfo->Instructions.push_back(Inst);
+}
+
+void MCStreamer::EmitWinCFIAllocStack(unsigned Size) {
+  EnsureValidWinFrameInfo();
+  if (Size == 0)
+    report_fatal_error("Allocation size must be non-zero!");
+  if (Size & 7)
+    report_fatal_error("Misaligned stack allocation!");
+
+  MCSymbol *Label = getContext().createTempSymbol();
+  EmitLabel(Label);
+
+  WinEH::Instruction Inst = Win64EH::Instruction::Alloc(Label, Size);
+  CurrentWinFrameInfo->Instructions.push_back(Inst);
+}
+
+void MCStreamer::EmitWinCFISaveReg(unsigned Register, unsigned Offset) {
+  EnsureValidWinFrameInfo();
+  if (Offset & 7)
+    report_fatal_error("Misaligned saved register offset!");
+
+  MCSymbol *Label = getContext().createTempSymbol();
+  EmitLabel(Label);
+
+  WinEH::Instruction Inst =
+      Win64EH::Instruction::SaveNonVol(Label, Register, Offset);
+  CurrentWinFrameInfo->Instructions.push_back(Inst);
+}
+
+void MCStreamer::EmitWinCFISaveXMM(unsigned Register, unsigned Offset) {
+  EnsureValidWinFrameInfo();
+  if (Offset & 0x0F)
+    report_fatal_error("Misaligned saved vector register offset!");
+
+  MCSymbol *Label = getContext().createTempSymbol();
+  EmitLabel(Label);
+
+  WinEH::Instruction Inst =
+      Win64EH::Instruction::SaveXMM(Label, Register, Offset);
+  CurrentWinFrameInfo->Instructions.push_back(Inst);
+}
+
+void MCStreamer::EmitWinCFIPushFrame(bool Code) {
+  EnsureValidWinFrameInfo();
+  if (CurrentWinFrameInfo->Instructions.size() > 0)
+    report_fatal_error("If present, PushMachFrame must be the first UOP");
+
+  MCSymbol *Label = getContext().createTempSymbol();
+  EmitLabel(Label);
+
+  WinEH::Instruction Inst = Win64EH::Instruction::PushMachFrame(Label, Code);
+  CurrentWinFrameInfo->Instructions.push_back(Inst);
+}
+
+void MCStreamer::EmitWinCFIEndProlog() {
+  EnsureValidWinFrameInfo();
+
+  MCSymbol *Label = getContext().createTempSymbol();
+  EmitLabel(Label);
+
+  CurrentWinFrameInfo->PrologEnd = Label;
+}
+
+void MCStreamer::EmitCOFFSafeSEH(MCSymbol const *Symbol) {
+}
+
+void MCStreamer::EmitCOFFSectionIndex(MCSymbol const *Symbol) {
+}
+
+void MCStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) {
+}
+
+/// EmitRawText - If this file is backed by an assembly streamer, this dumps
+/// the specified string in the output .s file.  This capability is
+/// indicated by the hasRawTextSupport() predicate.
+void MCStreamer::EmitRawTextImpl(StringRef String) {
+  errs() << "EmitRawText called on an MCStreamer that doesn't support it, "
+  " something must not be fully mc'ized\n";
+  abort();
+}
+
+void MCStreamer::EmitRawText(const Twine &T) {
+  SmallString<128> Str;
+  EmitRawTextImpl(T.toStringRef(Str));
+}
+
+void MCStreamer::EmitWindowsUnwindTables() {
+}
+
+void MCStreamer::Finish() {
+  if (!DwarfFrameInfos.empty() && !DwarfFrameInfos.back().End)
+    report_fatal_error("Unfinished frame!");
+
+  MCTargetStreamer *TS = getTargetStreamer();
+  if (TS)
+    TS->finish();
+
+  FinishImpl();
+}
+
+void MCStreamer::EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) {
+  visitUsedExpr(*Value);
+  Symbol->setVariableValue(Value);
+
+  MCTargetStreamer *TS = getTargetStreamer();
+  if (TS)
+    TS->emitAssignment(Symbol, Value);
+}
+
+void MCTargetStreamer::prettyPrintAsm(MCInstPrinter &InstPrinter, raw_ostream &OS,
+                              const MCInst &Inst, const MCSubtargetInfo &STI) {
+  InstPrinter.printInst(&Inst, OS, "", STI);
+}
+
+void MCStreamer::visitUsedSymbol(const MCSymbol &Sym) {
+}
+
+void MCStreamer::visitUsedExpr(const MCExpr &Expr) {
+  switch (Expr.getKind()) {
+  case MCExpr::Target:
+    cast<MCTargetExpr>(Expr).visitUsedExpr(*this);
+    break;
+
+  case MCExpr::Constant:
+    break;
+
+  case MCExpr::Binary: {
+    const MCBinaryExpr &BE = cast<MCBinaryExpr>(Expr);
+    visitUsedExpr(*BE.getLHS());
+    visitUsedExpr(*BE.getRHS());
+    break;
+  }
+
+  case MCExpr::SymbolRef:
+    visitUsedSymbol(cast<MCSymbolRefExpr>(Expr).getSymbol());
+    break;
+
+  case MCExpr::Unary:
+    visitUsedExpr(*cast<MCUnaryExpr>(Expr).getSubExpr());
+    break;
+  }
+}
+
+void MCStreamer::EmitInstruction(const MCInst &Inst,
+                                 const MCSubtargetInfo &STI) {
+  // Scan for values.
+  for (unsigned i = Inst.getNumOperands(); i--;)
+    if (Inst.getOperand(i).isExpr())
+      visitUsedExpr(*Inst.getOperand(i).getExpr());
+}
+
+void MCStreamer::emitAbsoluteSymbolDiff(const MCSymbol *Hi, const MCSymbol *Lo,
+                                        unsigned Size) {
+  // Get the Hi-Lo expression.
+  const MCExpr *Diff =
+      MCBinaryExpr::createSub(MCSymbolRefExpr::create(Hi, Context),
+                              MCSymbolRefExpr::create(Lo, Context), Context);
+
+  const MCAsmInfo *MAI = Context.getAsmInfo();
+  if (!MAI->doesSetDirectiveSuppressesReloc()) {
+    EmitValue(Diff, Size);
+    return;
+  }
+
+  // Otherwise, emit with .set (aka assignment).
+  MCSymbol *SetLabel = Context.createTempSymbol("set", true);
+  EmitAssignment(SetLabel, Diff);
+  EmitSymbolValue(SetLabel, Size);
+}
+
+void MCStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) {}
+void MCStreamer::EmitThumbFunc(MCSymbol *Func) {}
+void MCStreamer::EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {}
+void MCStreamer::BeginCOFFSymbolDef(const MCSymbol *Symbol) {}
+void MCStreamer::EndCOFFSymbolDef() {}
+void MCStreamer::EmitFileDirective(StringRef Filename) {}
+void MCStreamer::EmitCOFFSymbolStorageClass(int StorageClass) {}
+void MCStreamer::EmitCOFFSymbolType(int Type) {}
+void MCStreamer::emitELFSize(MCSymbolELF *Symbol, const MCExpr *Value) {}
+void MCStreamer::EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
+                                       unsigned ByteAlignment) {}
+void MCStreamer::EmitTBSSSymbol(MCSection *Section, MCSymbol *Symbol,
+                                uint64_t Size, unsigned ByteAlignment) {}
+void MCStreamer::ChangeSection(MCSection *, const MCExpr *) {}
+void MCStreamer::EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) {}
+void MCStreamer::EmitBytes(StringRef Data) {}
+void MCStreamer::EmitValueImpl(const MCExpr *Value, unsigned Size, SMLoc Loc) {
+  visitUsedExpr(*Value);
+}
+void MCStreamer::EmitULEB128Value(const MCExpr *Value) {}
+void MCStreamer::EmitSLEB128Value(const MCExpr *Value) {}
+void MCStreamer::EmitValueToAlignment(unsigned ByteAlignment, int64_t Value,
+                                      unsigned ValueSize,
+                                      unsigned MaxBytesToEmit) {}
+void MCStreamer::EmitCodeAlignment(unsigned ByteAlignment,
+                                   unsigned MaxBytesToEmit) {}
+void MCStreamer::emitValueToOffset(const MCExpr *Offset, unsigned char Value) {}
+void MCStreamer::EmitBundleAlignMode(unsigned AlignPow2) {}
+void MCStreamer::EmitBundleLock(bool AlignToEnd) {}
+void MCStreamer::FinishImpl() {}
+void MCStreamer::EmitBundleUnlock() {}
+
+void MCStreamer::SwitchSection(MCSection *Section, const MCExpr *Subsection) {
+  assert(Section && "Cannot switch to a null section!");
+  MCSectionSubPair curSection = SectionStack.back().first;
+  SectionStack.back().second = curSection;
+  if (MCSectionSubPair(Section, Subsection) != curSection) {
+    ChangeSection(Section, Subsection);
+    SectionStack.back().first = MCSectionSubPair(Section, Subsection);
+    assert(!Section->hasEnded() && "Section already ended");
+    MCSymbol *Sym = Section->getBeginSymbol();
+    if (Sym && !Sym->isInSection())
+      EmitLabel(Sym);
+  }
+}
+
+MCSymbol *MCStreamer::endSection(MCSection *Section) {
+  // TODO: keep track of the last subsection so that this symbol appears in the
+  // correct place.
+  MCSymbol *Sym = Section->getEndSymbol(Context);
+  if (Sym->isInSection())
+    return Sym;
+
+  SwitchSection(Section);
+  EmitLabel(Sym);
+  return Sym;
+}