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#!/usr/bin/env python3
# Copyright 2021 WebAssembly Community Group participants
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""A test case update script.
This script is a utility to update wasm-opt based lit tests with new FileCheck
patterns. It is based on LLVM's update_llc_test_checks.py script.
"""
import argparse
import glob
import os
import re
import subprocess
import sys
import tempfile
script_name = os.path.basename(__file__)
NOTICE = (f';; NOTE: Assertions have been generated by {script_name} and ' +
'should not be edited.')
RUN_LINE_RE = re.compile(r'^\s*;;\s*RUN:\s*(.*)$')
CHECK_PREFIX_RE = re.compile(r'.*--check-prefix[= ](\S+).*')
FUNC_RE = re.compile(r'(^\s*)\(func \$(\S*).*$', re.MULTILINE)
def warn(msg):
print(f'WARNING: {msg}', file=sys.stderr)
def itertests(args):
"""
Yield (filename, lines) for each test specified in the command line args
"""
for pattern in args.tests:
tests = glob.glob(pattern, recursive=True)
if not tests:
warn(f'No tests matched {pattern}. Ignoring it.')
continue
for test in tests:
with open(test) as f:
lines = [line.rstrip() for line in f]
first_line = lines[0] if lines else ''
if script_name not in first_line and not args.force:
warn(f'Skipping test {test} which was not generated by '
f'{script_name}. Use -f to override.')
continue
yield test, lines
def find_run_lines(test, lines):
line_matches = [RUN_LINE_RE.match(l) for l in lines]
matches = [match.group(1) for match in line_matches if match]
if not matches:
warn(f'No RUN lines found in {test}. Ignoring.')
return []
run_lines = [matches[0]]
for line in matches[1:]:
if run_lines[-1].endswith('\\'):
run_lines[-1] = run_lines[-1].rstrip('\\') + ' ' + line
else:
run_lines.append(line)
return run_lines
def run_command(args, test, tmp, command):
env = dict(os.environ)
env['PATH'] = args.binaryen_bin + os.pathsep + env['PATH']
command = command.replace('%s', test)
command = command.replace('%t', tmp)
return subprocess.check_output(command, shell=True, env=env).decode('utf-8')
def find_funcs(module):
"""Return a dict mapping each function name to lines in the function"""
result = {}
for match in FUNC_RE.finditer(module):
name = match.group(2)
depth = 1
for end in range(match.end(), len(module)):
if depth == 0:
break
elif module[end] == '(':
depth += 1
elif module[end] == ')':
depth -= 1
result[name] = module[match.start():end].split('\n')
return result
def main():
parser = argparse.ArgumentParser(description=__doc__)
parser.add_argument(
'--binaryen-bin', dest='binaryen_bin', default='bin',
help=('Specifies the path to the Binaryen executables in the CMake build'
' directory. Default: bin/ of current directory (i.e. assume an'
' in-tree build).'))
parser.add_argument(
'-f', '--force', action='store_true',
help=('Generate FileCheck patterns even for test files whose existing '
'patterns were not generated by this script.'))
parser.add_argument(
'--dry-run', action='store_true',
help=('Print the updated test file contents instead of changing the '
'test files'))
parser.add_argument('tests', nargs='+', help='The test files to update')
args = parser.parse_args()
args.binaryen_bin = os.path.abspath(args.binaryen_bin)
tmp = tempfile.mktemp()
for test, lines in itertests(args):
run_list = []
for line in find_run_lines(test, lines):
commands = [cmd.strip() for cmd in line.rsplit('|', 1)]
filecheck_cmd = ''
if len(commands) > 1 and commands[1].startswith('filecheck '):
filecheck_cmd = commands[1]
commands = commands[:1]
check_prefix = ''
if filecheck_cmd.startswith('filecheck '):
prefix_match = CHECK_PREFIX_RE.match(filecheck_cmd)
if prefix_match:
check_prefix = prefix_match.group(1)
else:
check_prefix = 'CHECK'
run_list.append((check_prefix, commands[0]))
# Map check prefixes and function names to the corresponding output
func_dict = {}
for prefix, command, in run_list:
output = run_command(args, test, tmp, command)
if prefix:
func_dict[prefix] = find_funcs(output)
check_line_re = re.compile(r'^\s*;;\s*(' + '|'.join(func_dict.keys()) +
r')(?:-NEXT|-LABEL|-NOT)?: .*$')
output_lines = [NOTICE]
if lines and script_name in lines[0]:
lines = lines[1:]
for line in lines:
if check_line_re.match(line):
continue
func_match = FUNC_RE.match(line)
if func_match:
indent, name = func_match.groups()
for prefix, funcs in func_dict.items():
body = funcs.get(name, [])
if not body:
continue
output_lines.append(f'{indent};; {prefix}: {body[0]}')
for l in body[1:]:
output_lines.append(f'{indent};; {prefix}-NEXT:{l}')
output_lines.append(line)
if args.dry_run:
print('\n'.join(output_lines))
else:
with open(test, 'w') as f:
for line in output_lines:
f.write(line + '\n')
if __name__ == '__main__':
main()
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