utils/update_llc_test_checks.py

   1 #!/usr/bin/env python
   2
   3 """A test case update script.
   4
   5 This script is a utility to update LLVM 'llc' based test cases with new
   6 FileCheck patterns. It can either update all of the tests in the file or
   7 a single test function.
   8 """
   9
  10 from __future__ import print_function
  11
  12 import argparse
  13 import glob
  14 import os         # Used to advertise this file's name ("autogenerated_note").
  15 import string
  16 import subprocess
  17 import sys
  18 import re
  19
  20 from UpdateTestChecks import asm, common
  21
  22 ADVERT = '; NOTE: Assertions have been autogenerated by '
  23
  24
  25 def main():
  26   parser = argparse.ArgumentParser(description=__doc__)
  27   parser.add_argument('-v', '--verbose', action='store_true',
  28                       help='Show verbose output')
  29   parser.add_argument('--llc-binary', default='llc',
  30                       help='The "llc" binary to use to generate the test case')
  31   parser.add_argument(
  32       '--function', help='The function in the test file to update')
  33   parser.add_argument(
  34       '--extra_scrub', action='store_true',
  35       help='Always use additional regex to further reduce diffs between various subtargets')
  36   parser.add_argument(
  37       '--x86_scrub_rip', action='store_true', default=True,
  38       help='Use more regex for x86 matching to reduce diffs between various subtargets')
  39   parser.add_argument(
  40       '--no_x86_scrub_rip', action='store_false', dest='x86_scrub_rip')
  41   parser.add_argument('tests', nargs='+')
  42   args = parser.parse_args()
  43
  44   autogenerated_note = (ADVERT + 'utils/' + os.path.basename(__file__))
  45
  46   test_paths = [test for pattern in args.tests for test in glob.glob(pattern)]
  47   for test in test_paths:
  48     if args.verbose:
  49       print('Scanning for RUN lines in test file: %s' % (test,), file=sys.stderr)
  50     with open(test) as f:
  51       input_lines = [l.rstrip() for l in f]
  52
  53     triple_in_ir = None
  54     for l in input_lines:
  55       m = common.TRIPLE_IR_RE.match(l)
  56       if m:
  57         triple_in_ir = m.groups()[0]
  58         break
  59
  60     raw_lines = [m.group(1)
  61                  for m in [common.RUN_LINE_RE.match(l) for l in input_lines] if m]
  62     run_lines = [raw_lines[0]] if len(raw_lines) > 0 else []
  63     for l in raw_lines[1:]:
  64       if run_lines[-1].endswith("\\"):
  65         run_lines[-1] = run_lines[-1].rstrip("\\") + " " + l
  66       else:
  67         run_lines.append(l)
  68
  69     if args.verbose:
  70       print('Found %d RUN lines:' % (len(run_lines),), file=sys.stderr)
  71       for l in run_lines:
  72         print('  RUN: ' + l, file=sys.stderr)
  73
  74     run_list = []
  75     for l in run_lines:
  76       commands = [cmd.strip() for cmd in l.split('|', 1)]
  77       llc_cmd = commands[0]
  78
  79       triple_in_cmd = None
  80       m = common.TRIPLE_ARG_RE.search(llc_cmd)
  81       if m:
  82         triple_in_cmd = m.groups()[0]
  83
  84       filecheck_cmd = ''
  85       if len(commands) > 1:
  86         filecheck_cmd = commands[1]
  87       if not llc_cmd.startswith('llc '):
  88         print('WARNING: Skipping non-llc RUN line: ' + l, file=sys.stderr)
  89         continue
  90
  91       if not filecheck_cmd.startswith('FileCheck '):
  92         print('WARNING: Skipping non-FileChecked RUN line: ' + l, file=sys.stderr)
  93         continue
  94
  95       llc_cmd_args = llc_cmd[len('llc'):].strip()
  96       llc_cmd_args = llc_cmd_args.replace('< %s', '').replace('%s', '').strip()
  97
  98       check_prefixes = [item for m in common.CHECK_PREFIX_RE.finditer(filecheck_cmd)
  99                                for item in m.group(1).split(',')]
 100       if not check_prefixes:
 101         check_prefixes = ['CHECK']
 102
 103       # FIXME: We should use multiple check prefixes to common check lines. For
 104       # now, we just ignore all but the last.
 105       run_list.append((check_prefixes, llc_cmd_args, triple_in_cmd))
 106
 107     func_dict = {}
 108     for p in run_list:
 109       prefixes = p[0]
 110       for prefix in prefixes:
 111         func_dict.update({prefix: dict()})
 112     for prefixes, llc_args, triple_in_cmd in run_list:
 113       if args.verbose:
 114         print('Extracted LLC cmd: llc ' + llc_args, file=sys.stderr)
 115         print('Extracted FileCheck prefixes: ' + str(prefixes), file=sys.stderr)
 116
 117       raw_tool_output = common.invoke_tool(args.llc_binary, llc_args, test)
 118       if not (triple_in_cmd or triple_in_ir):
 119         print("Cannot find a triple. Assume 'x86'", file=sys.stderr)
 120
 121       asm.build_function_body_dictionary_for_triple(args, raw_tool_output,
 122           triple_in_cmd or triple_in_ir or 'x86', prefixes, func_dict)
 123
 124     is_in_function = False
 125     is_in_function_start = False
 126     func_name = None
 127     prefix_set = set([prefix for p in run_list for prefix in p[0]])
 128     if args.verbose:
 129       print('Rewriting FileCheck prefixes: %s' % (prefix_set,), file=sys.stderr)
 130     output_lines = []
 131     output_lines.append(autogenerated_note)
 132
 133     for input_line in input_lines:
 134       if is_in_function_start:
 135         if input_line == '':
 136           continue
 137         if input_line.lstrip().startswith(';'):
 138           m = common.CHECK_RE.match(input_line)
 139           if not m or m.group(1) not in prefix_set:
 140             output_lines.append(input_line)
 141             continue
 142
 143         # Print out the various check lines here.
 144         asm.add_asm_checks(output_lines, ';', run_list, func_dict, func_name)
 145         is_in_function_start = False
 146
 147       if is_in_function:
 148         if common.should_add_line_to_output(input_line, prefix_set):
 149           # This input line of the function body will go as-is into the output.
 150           output_lines.append(input_line)
 151         else:
 152           continue
 153         if input_line.strip() == '}':
 154           is_in_function = False
 155         continue
 156
 157       # Discard any previous script advertising.
 158       if input_line.startswith(ADVERT):
 159         continue
 160
 161       # If it's outside a function, it just gets copied to the output.
 162       output_lines.append(input_line)
 163
 164       m = common.IR_FUNCTION_RE.match(input_line)
 165       if not m:
 166         continue
 167       func_name = m.group(1)
 168       if args.function is not None and func_name != args.function:
 169         # When filtering on a specific function, skip all others.
 170         continue
 171       is_in_function = is_in_function_start = True
 172
 173     if args.verbose:
 174       print('Writing %d lines to %s...' % (len(output_lines), test), file=sys.stderr)
 175
 176     with open(test, 'wb') as f:
 177       f.writelines(['{}\n'.format(l).encode('utf-8') for l in output_lines])
 178
 179
 180 if __name__ == '__main__':
 181   main()