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5b7e52901d
LLVM always prints IR constants as signed decimal, which is not ideal when looking for packed bit patterns in tests. Add a little filter script that turns hex constants of the form `<iNN 0xNNNNN>` into the decimal output we'd expect from the LLVM printer.
32 lines
1.0 KiB
Python
Executable File
32 lines
1.0 KiB
Python
Executable File
#!/usr/bin/env python
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# Check HEX -- a stupid filter that allows hexadecimal literals to be checked
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# for in LLVM IR FileCheck tests. It works by replacing occurrences of
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# strings matching the regex /< (i[0-9]+) \s+ (0x[0-9A-Fa-f]+) >/x with the
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# decimal literal equivalent that would really appear in printed LLVM IR.
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from __future__ import print_function
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import re
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import sys
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hex = re.compile(r"""<(i([0-9]+)\s+)0x([0-9A-Fa-f_]+)>""")
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def hexReplace(match):
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# Integer type is match group 1
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ty = match.group(1)
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# Integer bit width is match group 2
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bits = int(match.group(2))
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# Hex value is match group 3
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value = int(match.group(3).replace("_", ""), base=16)
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# LLVM prints the decimal value as if it's two's-complement signed in
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# the given bitwidth, so the printed value will be negative if
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# greater than 2^(bits - 1)
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if value >= (1 << (bits - 1)):
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value -= 1 << bits
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return ty + str(value)
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for line in sys.stdin:
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print(re.sub(hex, hexReplace, line), end="")
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