#!/usr/bin/env python3 """A test case update script. This script is a utility to update LLVM 'llc' based test cases with new FileCheck patterns. It can either update all of the tests in the file or a single test function. """ from __future__ import print_function import argparse import glob import os # Used to advertise this file's name ("autogenerated_note"). import string import subprocess import sys import re from UpdateTestChecks import asm, common ADVERT = ' NOTE: Assertions have been autogenerated by ' # llc is the only llc-like in the LLVM tree but downstream forks can add # additional ones here if they have them. LLC_LIKE_TOOLS = ('llc',) def main(): parser = argparse.ArgumentParser(description=__doc__) parser.add_argument('--llc-binary', default=None, help='The "llc" binary to use to generate the test case') parser.add_argument( '--function', help='The function in the test file to update') parser.add_argument( '--extra_scrub', action='store_true', help='Always use additional regex to further reduce diffs between various subtargets') parser.add_argument( '--x86_scrub_rip', action='store_true', default=True, help='Use more regex for x86 matching to reduce diffs between various subtargets') parser.add_argument( '--no_x86_scrub_rip', action='store_false', dest='x86_scrub_rip') parser.add_argument( '--no_x86_scrub_mem_shuffle', action='store_true', default=False, help='Reduce scrubbing shuffles with memory operands') parser.add_argument('tests', nargs='+') args = common.parse_commandline_args(parser) script_name = os.path.basename(__file__) test_paths = [test for pattern in args.tests for test in glob.glob(pattern)] for test in test_paths: with open(test) as f: input_lines = [l.rstrip() for l in f] first_line = input_lines[0] if input_lines else "" if 'autogenerated' in first_line and script_name not in first_line: common.warn("Skipping test which wasn't autogenerated by " + script_name, test) continue if args.update_only: if not first_line or 'autogenerated' not in first_line: common.warn("Skipping test which isn't autogenerated: " + test) continue triple_in_ir = None for l in input_lines: m = common.TRIPLE_IR_RE.match(l) if m: triple_in_ir = m.groups()[0] break run_lines = common.find_run_lines(test, input_lines) run_list = [] for l in run_lines: if '|' not in l: common.warn('Skipping unparseable RUN line: ' + l) continue commands = [cmd.strip() for cmd in l.split('|', 1)] llc_cmd = commands[0] llc_tool = llc_cmd.split(' ')[0] triple_in_cmd = None m = common.TRIPLE_ARG_RE.search(llc_cmd) if m: triple_in_cmd = m.groups()[0] march_in_cmd = None m = common.MARCH_ARG_RE.search(llc_cmd) if m: march_in_cmd = m.groups()[0] filecheck_cmd = '' if len(commands) > 1: filecheck_cmd = commands[1] common.verify_filecheck_prefixes(filecheck_cmd) if llc_tool not in LLC_LIKE_TOOLS: common.warn('Skipping non-llc RUN line: ' + l) continue if not filecheck_cmd.startswith('FileCheck '): common.warn('Skipping non-FileChecked RUN line: ' + l) continue llc_cmd_args = llc_cmd[len(llc_tool):].strip() llc_cmd_args = llc_cmd_args.replace('< %s', '').replace('%s', '').strip() if test.endswith('.mir'): llc_cmd_args += ' -x mir' 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. run_list.append((check_prefixes, llc_cmd_args, triple_in_cmd, march_in_cmd)) if test.endswith('.mir'): comment_sym = '#' check_indent = ' ' else: comment_sym = ';' check_indent = '' autogenerated_note = (comment_sym + ADVERT + 'utils/' + script_name) func_dict = {} for p in run_list: prefixes = p[0] for prefix in prefixes: func_dict.update({prefix: dict()}) for prefixes, llc_args, triple_in_cmd, march_in_cmd in run_list: common.debug('Extracted LLC cmd:', llc_tool, llc_args) common.debug('Extracted FileCheck prefixes:', str(prefixes)) raw_tool_output = common.invoke_tool(args.llc_binary or llc_tool, llc_args, test) triple = triple_in_cmd or triple_in_ir if not triple: triple = asm.get_triple_from_march(march_in_cmd) asm.build_function_body_dictionary_for_triple(args, raw_tool_output, triple, prefixes, func_dict) is_in_function = False is_in_function_start = False func_name = None prefix_set = set([prefix for p in run_list for prefix in p[0]]) common.debug('Rewriting FileCheck prefixes:', str(prefix_set)) 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. asm.add_asm_checks(output_lines, check_indent + ';', run_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. 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(comment_sym + ADVERT): continue # If it's outside a function, it just gets copied to the output. output_lines.append(input_line) m = common.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 common.debug('Writing %d lines to %s...' % (len(output_lines), test)) with open(test, 'wb') as f: f.writelines(['{}\n'.format(l).encode('utf-8') for l in output_lines]) if __name__ == '__main__': main()