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e6e5fbb671
generated ARM match table, which is substantially more efficient than dealing with tblgen. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123252 91177308-0d34-0410-b5e6-96231b3b80d8
62 lines
2.1 KiB
Python
62 lines
2.1 KiB
Python
#!/usr/bin/env python
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def analyze_match_table(path):
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# Extract the instruction table.
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data = open(path).read()
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start = data.index("static const MatchEntry MatchTable")
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end = data.index("\n};\n", start)
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lines = data[start:end].split("\n")[1:]
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# Parse the instructions.
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insns = []
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for ln in lines:
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ln = ln.split("{", 1)[1]
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ln = ln.rsplit("}", 1)[0]
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a,bc = ln.split("{", 1)
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b,c = bc.split("}", 1)
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code, string, converter, _ = [s.strip()
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for s in a.split(",")]
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items = [s.strip() for s in b.split(",")]
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_,features = [s.strip() for s in c.split(",")]
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assert string[0] == string[-1] == '"'
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string = string[1:-1]
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insns.append((code,string,converter,items,features))
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# For every mnemonic, compute whether or not it can have a carry setting
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# operand and whether or not it can have a predication code.
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mnemonic_flags = {}
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for insn in insns:
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mnemonic = insn[1]
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items = insn[3]
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flags = mnemonic_flags[mnemonic] = mnemonic_flags.get(mnemonic, set())
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flags.update(items)
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mnemonics = set(mnemonic_flags)
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ccout_mnemonics = set(m for m in mnemonics
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if 'MCK_CCOut' in mnemonic_flags[m])
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condcode_mnemonics = set(m for m in mnemonics
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if 'MCK_CondCode' in mnemonic_flags[m])
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noncondcode_mnemonics = mnemonics - condcode_mnemonics
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print ' || '.join('Mnemonic == "%s"' % m
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for m in ccout_mnemonics)
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print ' || '.join('Mnemonic == "%s"' % m
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for m in noncondcode_mnemonics)
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def main():
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import sys
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if len(sys.argv) == 1:
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import os
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from lit.Util import capture
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llvm_obj_root = capture(["llvm-config", "--obj-root"])
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file = os.path.join(llvm_obj_root,
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"lib/Target/ARM/ARMGenAsmMatcher.inc")
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elif len(sys.argv) == 2:
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file = sys.argv[1]
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else:
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raise NotImplementedError
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analyze_match_table(file)
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if __name__ == '__main__':
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main()
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