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#!/usr/bin/env python
def analyze_match_table(path):
# Extract the instruction table.
data = open(path).read()
start = data.index("static const MatchEntry MatchTable")
end = data.index("\n};\n", start)
lines = data[start:end].split("\n")[1:]
# Parse the instructions.
insns = []
for ln in lines:
ln = ln.split("{", 1)[1]
ln = ln.rsplit("}", 1)[0]
a,bc = ln.split("{", 1)
b,c = bc.split("}", 1)
code, string, converter, _ = [s.strip()
for s in a.split(",")]
items = [s.strip() for s in b.split(",")]
_,features = [s.strip() for s in c.split(",")]
assert string[0] == string[-1] == '"'
string = string[1:-1]
insns.append((code,string,converter,items,features))
# For every mnemonic, compute whether or not it can have a carry setting
# operand and whether or not it can have a predication code.
mnemonic_flags = {}
for insn in insns:
mnemonic = insn[1]
items = insn[3]
flags = mnemonic_flags[mnemonic] = mnemonic_flags.get(mnemonic, set())
flags.update(items)
mnemonics = set(mnemonic_flags)
ccout_mnemonics = set(m for m in mnemonics
if 'MCK_CCOut' in mnemonic_flags[m])
condcode_mnemonics = set(m for m in mnemonics
if 'MCK_CondCode' in mnemonic_flags[m])
noncondcode_mnemonics = mnemonics - condcode_mnemonics
print ' || '.join('Mnemonic == "%s"' % m
for m in ccout_mnemonics)
print ' || '.join('Mnemonic == "%s"' % m
for m in noncondcode_mnemonics)
def main():
import sys
if len(sys.argv) == 1:
import os
from lit.Util import capture
llvm_obj_root = capture(["llvm-config", "--obj-root"])
file = os.path.join(llvm_obj_root,
"lib/Target/ARM/ARMGenAsmMatcher.inc")
elif len(sys.argv) == 2:
file = sys.argv[1]
else:
raise NotImplementedError
analyze_match_table(file)
if __name__ == '__main__':
main()
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