217 lines
7.8 KiB
Python
Executable File
217 lines
7.8 KiB
Python
Executable File
#!/usr/bin/env python
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"""A script to generate FileCheck statements for 'opt' regression tests.
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This script is a utility to update LLVM opt test cases with new
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FileCheck patterns. It can either update all of the tests in the file or
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a single test function.
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Example usage:
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$ update_test_checks.py --opt=../bin/opt test/foo.ll
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Workflow:
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1. Make a compiler patch that requires updating some number of FileCheck lines
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in regression test files.
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2. Save the patch and revert it from your local work area.
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3. Update the RUN-lines in the affected regression tests to look canonical.
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Example: "; RUN: opt < %s -instcombine -S | FileCheck %s"
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4. Refresh the FileCheck lines for either the entire file or select functions by
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running this script.
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5. Commit the fresh baseline of checks.
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6. Apply your patch from step 1 and rebuild your local binaries.
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7. Re-run this script on affected regression tests.
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8. Check the diffs to ensure the script has done something reasonable.
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9. Submit a patch including the regression test diffs for review.
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A common pattern is to have the script insert complete checking of every
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instruction. Then, edit it down to only check the relevant instructions.
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The script is designed to make adding checks to a test case fast, it is *not*
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designed to be authoratitive about what constitutes a good test!
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"""
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from __future__ import print_function
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import argparse
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import glob
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import itertools
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import os # Used to advertise this file's name ("autogenerated_note").
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import string
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import subprocess
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import sys
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import tempfile
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import re
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from UpdateTestChecks import common
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ADVERT = '; NOTE: Assertions have been autogenerated by '
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# RegEx: this is where the magic happens.
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IR_FUNCTION_RE = re.compile('^\s*define\s+(?:internal\s+)?[^@]*@([\w-]+)\s*\(')
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def main():
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from argparse import RawTextHelpFormatter
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parser = argparse.ArgumentParser(description=__doc__, formatter_class=RawTextHelpFormatter)
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parser.add_argument('-v', '--verbose', action='store_true',
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help='Show verbose output')
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parser.add_argument('--opt-binary', default='opt',
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help='The opt binary used to generate the test case')
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parser.add_argument(
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'--function', help='The function in the test file to update')
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parser.add_argument('-u', '--update-only', action='store_true',
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help='Only update test if it was already autogened')
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parser.add_argument('tests', nargs='+')
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args = parser.parse_args()
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script_name = os.path.basename(__file__)
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autogenerated_note = (ADVERT + 'utils/' + script_name)
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opt_basename = os.path.basename(args.opt_binary)
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if not re.match(r'^opt(-\d+)?$', opt_basename):
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common.error('Unexpected opt name: ' + opt_basename)
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sys.exit(1)
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opt_basename = 'opt'
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for test in args.tests:
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if not glob.glob(test):
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common.warn("Test file pattern '%s' was not found. Ignoring it." % (test,))
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continue
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# On Windows we must expand the patterns ourselves.
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test_paths = [test for pattern in args.tests for test in glob.glob(pattern)]
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for test in test_paths:
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if args.verbose:
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print('Scanning for RUN lines in test file: ' + test, file=sys.stderr)
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with open(test) as f:
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input_lines = [l.rstrip() for l in f]
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first_line = input_lines[0] if input_lines else ""
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if 'autogenerated' in first_line and script_name not in first_line:
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common.warn("Skipping test which wasn't autogenerated by " + script_name, test)
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continue
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if args.update_only:
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if not first_line or 'autogenerated' not in first_line:
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common.warn("Skipping test which isn't autogenerated: " + test)
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continue
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raw_lines = [m.group(1)
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for m in [common.RUN_LINE_RE.match(l) for l in input_lines] if m]
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run_lines = [raw_lines[0]] if len(raw_lines) > 0 else []
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for l in raw_lines[1:]:
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if run_lines[-1].endswith('\\'):
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run_lines[-1] = run_lines[-1].rstrip('\\') + ' ' + l
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else:
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run_lines.append(l)
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if args.verbose:
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print('Found %d RUN lines:' % (len(run_lines),), file=sys.stderr)
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for l in run_lines:
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print(' RUN: ' + l, file=sys.stderr)
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prefix_list = []
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for l in run_lines:
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if '|' not in l:
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common.warn('Skipping unparseable RUN line: ' + l)
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continue
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(tool_cmd, filecheck_cmd) = tuple([cmd.strip() for cmd in l.split('|', 1)])
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common.verify_filecheck_prefixes(filecheck_cmd)
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if not tool_cmd.startswith(opt_basename + ' '):
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common.warn('Skipping non-%s RUN line: %s' % (opt_basename, l))
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continue
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if not filecheck_cmd.startswith('FileCheck '):
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common.warn('Skipping non-FileChecked RUN line: ' + l)
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continue
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tool_cmd_args = tool_cmd[len(opt_basename):].strip()
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tool_cmd_args = tool_cmd_args.replace('< %s', '').replace('%s', '').strip()
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check_prefixes = [item for m in common.CHECK_PREFIX_RE.finditer(filecheck_cmd)
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for item in m.group(1).split(',')]
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if not check_prefixes:
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check_prefixes = ['CHECK']
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# FIXME: We should use multiple check prefixes to common check lines. For
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# now, we just ignore all but the last.
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prefix_list.append((check_prefixes, tool_cmd_args))
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func_dict = {}
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for prefixes, _ in prefix_list:
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for prefix in prefixes:
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func_dict.update({prefix: dict()})
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for prefixes, opt_args in prefix_list:
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if args.verbose:
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print('Extracted opt cmd: ' + opt_basename + ' ' + opt_args, file=sys.stderr)
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print('Extracted FileCheck prefixes: ' + str(prefixes), file=sys.stderr)
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raw_tool_output = common.invoke_tool(args.opt_binary, opt_args, test)
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common.build_function_body_dictionary(
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common.OPT_FUNCTION_RE, common.scrub_body, [],
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raw_tool_output, prefixes, func_dict, args.verbose)
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is_in_function = False
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is_in_function_start = False
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prefix_set = set([prefix for prefixes, _ in prefix_list for prefix in prefixes])
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if args.verbose:
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print('Rewriting FileCheck prefixes: %s' % (prefix_set,), file=sys.stderr)
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output_lines = []
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output_lines.append(autogenerated_note)
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for input_line in input_lines:
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if is_in_function_start:
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if input_line == '':
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continue
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if input_line.lstrip().startswith(';'):
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m = common.CHECK_RE.match(input_line)
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if not m or m.group(1) not in prefix_set:
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output_lines.append(input_line)
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continue
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# Print out the various check lines here.
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common.add_ir_checks(output_lines, ';', prefix_list, func_dict, func_name)
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is_in_function_start = False
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if is_in_function:
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if common.should_add_line_to_output(input_line, prefix_set):
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# This input line of the function body will go as-is into the output.
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# Except make leading whitespace uniform: 2 spaces.
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input_line = common.SCRUB_LEADING_WHITESPACE_RE.sub(r' ', input_line)
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output_lines.append(input_line)
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else:
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continue
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if input_line.strip() == '}':
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is_in_function = False
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continue
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# Discard any previous script advertising.
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if input_line.startswith(ADVERT):
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continue
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# If it's outside a function, it just gets copied to the output.
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output_lines.append(input_line)
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m = IR_FUNCTION_RE.match(input_line)
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if not m:
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continue
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func_name = m.group(1)
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if args.function is not None and func_name != args.function:
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# When filtering on a specific function, skip all others.
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continue
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is_in_function = is_in_function_start = True
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if args.verbose:
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print('Writing %d lines to %s...' % (len(output_lines), test), file=sys.stderr)
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with open(test, 'wb') as f:
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f.writelines(['{}\n'.format(l).encode('utf-8') for l in output_lines])
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if __name__ == '__main__':
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main()
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