1#!/usr/bin/env python
2
3from __future__ import print_function
4
5def analyze_match_table(path):
6    # Extract the instruction table.
7    data = open(path).read()
8    start = data.index("static const MatchEntry MatchTable")
9    end = data.index("\n};\n", start)
10    lines = data[start:end].split("\n")[1:]
11
12    # Parse the instructions.
13    insns = []
14    for ln in lines:
15        ln = ln.split("{", 1)[1]
16        ln = ln.rsplit("}", 1)[0]
17        a,bc = ln.split("{", 1)
18        b,c = bc.split("}", 1)
19        code, string, converter, _ = [s.strip()
20                                      for s in a.split(",")]
21        items = [s.strip() for s in b.split(",")]
22        _,features = [s.strip() for s in c.split(",")]
23        assert string[0] == string[-1] == '"'
24        string = string[1:-1]
25        insns.append((code,string,converter,items,features))
26
27    # For every mnemonic, compute whether or not it can have a carry setting
28    # operand and whether or not it can have a predication code.
29    mnemonic_flags = {}
30    for insn in insns:
31        mnemonic = insn[1]
32        items = insn[3]
33        flags = mnemonic_flags[mnemonic] = mnemonic_flags.get(mnemonic, set())
34        flags.update(items)
35
36    mnemonics = set(mnemonic_flags)
37    ccout_mnemonics = set(m for m in mnemonics
38                          if 'MCK_CCOut' in mnemonic_flags[m])
39    condcode_mnemonics = set(m for m in mnemonics
40                             if 'MCK_CondCode' in mnemonic_flags[m])
41    noncondcode_mnemonics = mnemonics - condcode_mnemonics
42    print(' || '.join('Mnemonic == "%s"' % m
43                      for m in ccout_mnemonics))
44    print(' || '.join('Mnemonic == "%s"' % m
45                      for m in noncondcode_mnemonics))
46
47def main():
48    import sys
49    if len(sys.argv) == 1:
50        import os
51        from lit.Util import capture
52        llvm_obj_root = capture(["llvm-config", "--obj-root"])
53        file = os.path.join(llvm_obj_root,
54                            "lib/Target/ARM/ARMGenAsmMatcher.inc")
55    elif len(sys.argv) == 2:
56        file = sys.argv[1]
57    else:
58        raise NotImplementedError
59
60    analyze_match_table(file)
61
62if __name__ == '__main__':
63    main()
64