1 #!/usr/bin/env python 2 3 def analyze_match_table(path): 4 # Extract the instruction table. 5 data = open(path).read() 6 start = data.index("static const MatchEntry MatchTable") 7 end = data.index("\n};\n", start) 8 lines = data[start:end].split("\n")[1:] 9 10 # Parse the instructions. 11 insns = [] 12 for ln in lines: 13 ln = ln.split("{", 1)[1] 14 ln = ln.rsplit("}", 1)[0] 15 a,bc = ln.split("{", 1) 16 b,c = bc.split("}", 1) 17 code, string, converter, _ = [s.strip() 18 for s in a.split(",")] 19 items = [s.strip() for s in b.split(",")] 20 _,features = [s.strip() for s in c.split(",")] 21 assert string[0] == string[-1] == '"' 22 string = string[1:-1] 23 insns.append((code,string,converter,items,features)) 24 25 # For every mnemonic, compute whether or not it can have a carry setting 26 # operand and whether or not it can have a predication code. 27 mnemonic_flags = {} 28 for insn in insns: 29 mnemonic = insn[1] 30 items = insn[3] 31 flags = mnemonic_flags[mnemonic] = mnemonic_flags.get(mnemonic, set()) 32 flags.update(items) 33 34 mnemonics = set(mnemonic_flags) 35 ccout_mnemonics = set(m for m in mnemonics 36 if 'MCK_CCOut' in mnemonic_flags[m]) 37 condcode_mnemonics = set(m for m in mnemonics 38 if 'MCK_CondCode' in mnemonic_flags[m]) 39 noncondcode_mnemonics = mnemonics - condcode_mnemonics 40 print ' || '.join('Mnemonic == "%s"' % m 41 for m in ccout_mnemonics) 42 print ' || '.join('Mnemonic == "%s"' % m 43 for m in noncondcode_mnemonics) 44 45 def main(): 46 import sys 47 if len(sys.argv) == 1: 48 import os 49 from lit.Util import capture 50 llvm_obj_root = capture(["llvm-config", "--obj-root"]) 51 file = os.path.join(llvm_obj_root, 52 "lib/Target/ARM/ARMGenAsmMatcher.inc") 53 elif len(sys.argv) == 2: 54 file = sys.argv[1] 55 else: 56 raise NotImplementedError 57 58 analyze_match_table(file) 59 60 if __name__ == '__main__': 61 main() 62
