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Parallelize fixed wasm-reduce testcases #9101

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Merged
brendandahl merged 1 commit into from
Sep 11, 2026
Merged

Parallelize fixed wasm-reduce testcases #9101

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38 changes: 28 additions & 10 deletions check.py
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Original file line number Diff line number Diff line change
Expand Up @@ -137,6 +137,32 @@ def run_wasm_metadce_tests():
shared.fail_if_not_identical_to_file(stdout, expected + '.stdout')


def run_one_wasm_reduce_test(t, stdout=None):
base_name = os.path.splitext(os.path.basename(t))[0]
print('..', os.path.basename(t), file=stdout)
a_wasm = f'reduce_{base_name}_a.wasm'
b_wasm = f'reduce_{base_name}_b.wasm'
c_wasm = f'reduce_{base_name}_c.wasm'
a_wat = f'reduce_{base_name}_a.wat'
try:
support.run_command(shared.WASM_AS + [t, '-o', a_wasm, '-all'], stdout=stdout)
cmd = shared.WASM_OPT[0]
support.run_command(
shared.WASM_REDUCE + [a_wasm, f'--command={cmd} {b_wasm} --fuzz-exec -all', '-t', b_wasm, '-w', c_wasm, '--timeout=4'],
stdout=stdout,
stderr=subprocess.PIPE,
)
expected = t + '.txt'
support.run_command(shared.WASM_DIS + [c_wasm, '-o', a_wat], stdout=stdout)
with open(a_wat) as seen:
shared.fail_if_not_identical_to_file(seen.read(), expected)
finally:
shared.delete_from_orbit(a_wasm)
shared.delete_from_orbit(b_wasm)
shared.delete_from_orbit(c_wasm)
shared.delete_from_orbit(a_wat)


def run_wasm_reduce_tests():
if not shared.has_shell_timeout():
print_heading('skipping wasm-reduce testcases')
Expand All @@ -145,16 +171,8 @@ def run_wasm_reduce_tests():
print_heading('checking wasm-reduce testcases')

# fixed testcases
for t in shared.get_tests(shared.get_test_dir('reduce'), ['.wast']):
print('..', os.path.basename(t))
# convert to wasm
support.run_command(shared.WASM_AS + [t, '-o', 'a.wasm', '-all'])
cmd = shared.WASM_OPT[0]
support.run_command(shared.WASM_REDUCE + ['a.wasm', f'--command={cmd} b.wasm --fuzz-exec -all ', '-t', 'b.wasm', '-w', 'c.wasm', '--timeout=4'])
expected = t + '.txt'
support.run_command(shared.WASM_DIS + ['c.wasm', '-o', 'a.wat'])
with open('a.wat') as seen:
shared.fail_if_not_identical_to_file(seen.read(), expected)
tests = shared.get_tests(shared.get_test_dir('reduce'), ['.wast'])
shared.run_parallel_tests(run_one_wasm_reduce_test, tests)

# run on a nontrivial fuzz testcase, for general coverage
# this is very slow in ThreadSanitizer, so avoid it there
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