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Revert "Revert "For checking deterministic compilation, do an initial "warm-u…" #23504

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Mar 23, 2019
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Revert "Revert "For checking deterministic compilation, do an initial "warm-u…" #23504

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5 changes: 5 additions & 0 deletions utils/check-incremental
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Original file line number Diff line number Diff line change
Expand Up @@ -74,6 +74,11 @@ def main():
if VERBOSE:
print("Reference compilation of " + output_file + ":")

# As a workaround for rdar://problem/43442957 and rdar://problem/43439465
# we have to "warm-up" the clang module cache. Without that in some cases
# we end up with small differences in the debug info.
compile_and_stat(new_args, output_file)

reference_md5, reference_time = compile_and_stat(new_args, output_file)

subprocess.check_call(["cp", output_file, output_file + ".ref.o"])
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