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