223 lines
9.7 KiB
Python
Executable File
223 lines
9.7 KiB
Python
Executable File
#!/usr/bin/env python3
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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 os # Used to advertise this file's name ("autogenerated_note").
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import re
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import sys
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from UpdateTestChecks import common
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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('--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('-p', '--preserve-names', action='store_true',
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help='Do not scrub IR names')
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parser.add_argument('--function-signature', action='store_true',
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help='Keep function signature information around for the check line')
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parser.add_argument('--scrub-attributes', action='store_true',
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help='Remove attribute annotations (#0) from the end of check line')
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parser.add_argument('--check-attributes', action='store_true',
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help='Check "Function Attributes" for functions')
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parser.add_argument('--check-globals', action='store_true',
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help='Check global entries (global variables, metadata, attribute sets, ...) for functions')
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parser.add_argument('tests', nargs='+')
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initial_args = common.parse_commandline_args(parser)
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script_name = os.path.basename(__file__)
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opt_basename = os.path.basename(initial_args.opt_binary)
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if not re.match(r'^opt(-\d+)?(\.exe)?$', 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 ti in common.itertests(initial_args.tests, parser,
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script_name='utils/' + script_name):
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# If requested we scrub trailing attribute annotations, e.g., '#0', together with whitespaces
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if ti.args.scrub_attributes:
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common.SCRUB_TRAILING_WHITESPACE_TEST_RE = common.SCRUB_TRAILING_WHITESPACE_AND_ATTRIBUTES_RE
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else:
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common.SCRUB_TRAILING_WHITESPACE_TEST_RE = common.SCRUB_TRAILING_WHITESPACE_RE
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prefix_list = []
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for l in ti.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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commands = [cmd.strip() for cmd in l.split('|')]
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assert len(commands) >= 2
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preprocess_cmd = None
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if len(commands) > 2:
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preprocess_cmd = " | ".join(commands[:-2])
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tool_cmd = commands[-2]
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filecheck_cmd = commands[-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
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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, preprocess_cmd))
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global_vars_seen_dict = {}
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builder = common.FunctionTestBuilder(
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run_list=prefix_list,
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flags=ti.args,
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scrubber_args=[],
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path=ti.path)
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for prefixes, opt_args, preprocess_cmd in prefix_list:
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common.debug('Extracted opt cmd: ' + opt_basename + ' ' + opt_args)
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common.debug('Extracted FileCheck prefixes: ' + str(prefixes))
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raw_tool_output = common.invoke_tool(ti.args.opt_binary, opt_args,
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ti.path, preprocess_cmd=preprocess_cmd,
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verbose=ti.args.verbose)
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builder.process_run_line(common.OPT_FUNCTION_RE, common.scrub_body,
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raw_tool_output, prefixes, False)
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func_dict = builder.finish_and_get_func_dict()
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is_in_function = False
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is_in_function_start = False
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has_checked_pre_function_globals = False
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prefix_set = set([prefix for prefixes, _, _ in prefix_list for prefix in prefixes])
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common.debug('Rewriting FileCheck prefixes:', str(prefix_set))
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output_lines = []
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include_generated_funcs = common.find_arg_in_test(ti,
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lambda args: ti.args.include_generated_funcs,
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'--include-generated-funcs',
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True)
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if include_generated_funcs:
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# Generate the appropriate checks for each function. We need to emit
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# these in the order according to the generated output so that CHECK-LABEL
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# works properly. func_order provides that.
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# We can't predict where various passes might insert functions so we can't
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# be sure the input function order is maintained. Therefore, first spit
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# out all the source lines.
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common.dump_input_lines(output_lines, ti, prefix_set, ';')
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args = ti.args
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if args.check_globals:
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common.add_global_checks(builder.global_var_dict(), ';', prefix_list, output_lines, global_vars_seen_dict, args.preserve_names, True)
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# Now generate all the checks.
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common.add_checks_at_end(output_lines, prefix_list, builder.func_order(),
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';', lambda my_output_lines, prefixes, func:
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common.add_ir_checks(my_output_lines, ';',
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prefixes,
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func_dict, func, False,
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args.function_signature,
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global_vars_seen_dict,
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is_filtered=builder.is_filtered()))
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else:
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# "Normal" mode.
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for input_line_info in ti.iterlines(output_lines):
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input_line = input_line_info.line
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args = input_line_info.args
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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,
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func_name, args.preserve_names, args.function_signature,
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global_vars_seen_dict,
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is_filtered=builder.is_filtered())
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is_in_function_start = False
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m = common.IR_FUNCTION_RE.match(input_line)
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if m and not has_checked_pre_function_globals:
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if args.check_globals:
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common.add_global_checks(builder.global_var_dict(), ';', prefix_list, output_lines, global_vars_seen_dict, args.preserve_names, True)
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has_checked_pre_function_globals = True
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if common.should_add_line_to_output(input_line, prefix_set, not is_in_function):
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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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if input_line.strip() == '}':
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is_in_function = False
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continue
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if is_in_function:
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continue
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m = common.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.check_globals:
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common.add_global_checks(builder.global_var_dict(), ';', prefix_list, output_lines, global_vars_seen_dict, args.preserve_names, False)
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common.debug('Writing %d lines to %s...' % (len(output_lines), ti.path))
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with open(ti.path, '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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