utils/update_llc_test_checks.py

   1 #!/usr/bin/env python2.7
   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 import argparse
  11 import os         # Used to advertise this file's name ("autogenerated_note").
  12 import string
  13 import subprocess
  14 import sys
  15 import re
  16
  17 from UpdateTestChecks import asm, common
  18
  19 ADVERT = '; NOTE: Assertions have been autogenerated by '
  20
  21
  22 def main():
  23   parser = argparse.ArgumentParser(description=__doc__)
  24   parser.add_argument('-v', '--verbose', action='store_true',
  25                       help='Show verbose output')
  26   parser.add_argument('--llc-binary', default='llc',
  27                       help='The "llc" binary to use to generate the test case')
  28   parser.add_argument(
  29       '--function', help='The function in the test file to update')
  30   parser.add_argument(
  31       '--extra_scrub', action='store_true',
  32       help='Always use additional regex to further reduce diffs between various subtargets')
  33   parser.add_argument(
  34       '--x86_scrub_rip', action='store_true', default=True,
  35       help='Use more regex for x86 matching to reduce diffs between various subtargets')
  36   parser.add_argument(
  37       '--no_x86_scrub_rip', action='store_false', dest='x86_scrub_rip')
  38   parser.add_argument('tests', nargs='+')
  39   args = parser.parse_args()
  40
  41   autogenerated_note = (ADVERT + 'utils/' + os.path.basename(__file__))
  42
  43   for test in args.tests:
  44     if args.verbose:
  45       print >>sys.stderr, 'Scanning for RUN lines in test file: %s' % (test,)
  46     with open(test) as f:
  47       input_lines = [l.rstrip() for l in f]
  48
  49     triple_in_ir = None
  50     for l in input_lines:
  51       m = common.TRIPLE_IR_RE.match(l)
  52       if m:
  53         triple_in_ir = m.groups()[0]
  54         break
  55
  56     raw_lines = [m.group(1)
  57                  for m in [common.RUN_LINE_RE.match(l) for l in input_lines] if m]
  58     run_lines = [raw_lines[0]] if len(raw_lines) > 0 else []
  59     for l in raw_lines[1:]:
  60       if run_lines[-1].endswith("\\"):
  61         run_lines[-1] = run_lines[-1].rstrip("\\") + " " + l
  62       else:
  63         run_lines.append(l)
  64
  65     if args.verbose:
  66       print >>sys.stderr, 'Found %d RUN lines:' % (len(run_lines),)
  67       for l in run_lines:
  68         print >>sys.stderr, '  RUN: ' + l
  69
  70     run_list = []
  71     for l in run_lines:
  72       commands = [cmd.strip() for cmd in l.split('|', 1)]
  73       llc_cmd = commands[0]
  74
  75       triple_in_cmd = None
  76       m = common.TRIPLE_ARG_RE.search(llc_cmd)
  77       if m:
  78         triple_in_cmd = m.groups()[0]
  79
  80       filecheck_cmd = ''
  81       if len(commands) > 1:
  82         filecheck_cmd = commands[1]
  83       if not llc_cmd.startswith('llc '):
  84         print >>sys.stderr, 'WARNING: Skipping non-llc RUN line: ' + l
  85         continue
  86
  87       if not filecheck_cmd.startswith('FileCheck '):
  88         print >>sys.stderr, 'WARNING: Skipping non-FileChecked RUN line: ' + l
  89         continue
  90
  91       llc_cmd_args = llc_cmd[len('llc'):].strip()
  92       llc_cmd_args = llc_cmd_args.replace('< %s', '').replace('%s', '').strip()
  93
  94       check_prefixes = [item for m in common.CHECK_PREFIX_RE.finditer(filecheck_cmd)
  95                                for item in m.group(1).split(',')]
  96       if not check_prefixes:
  97         check_prefixes = ['CHECK']
  98
  99       # FIXME: We should use multiple check prefixes to common check lines. For
 100       # now, we just ignore all but the last.
 101       run_list.append((check_prefixes, llc_cmd_args, triple_in_cmd))
 102
 103     func_dict = {}
 104     for p in run_list:
 105       prefixes = p[0]
 106       for prefix in prefixes:
 107         func_dict.update({prefix: dict()})
 108     for prefixes, llc_args, triple_in_cmd in run_list:
 109       if args.verbose:
 110         print >>sys.stderr, 'Extracted LLC cmd: llc ' + llc_args
 111         print >>sys.stderr, 'Extracted FileCheck prefixes: ' + str(prefixes)
 112
 113       raw_tool_output = common.invoke_tool(args.llc_binary, llc_args, test)
 114       if not (triple_in_cmd or triple_in_ir):
 115         print >>sys.stderr, "Cannot find a triple. Assume 'x86'"
 116
 117       asm.build_function_body_dictionary_for_triple(args, raw_tool_output,
 118           triple_in_cmd or triple_in_ir or 'x86', prefixes, func_dict)
 119
 120     is_in_function = False
 121     is_in_function_start = False
 122     func_name = None
 123     prefix_set = set([prefix for p in run_list for prefix in p[0]])
 124     if args.verbose:
 125       print >>sys.stderr, 'Rewriting FileCheck prefixes: %s' % (prefix_set,)
 126     output_lines = []
 127     output_lines.append(autogenerated_note)
 128
 129     for input_line in input_lines:
 130       if is_in_function_start:
 131         if input_line == '':
 132           continue
 133         if input_line.lstrip().startswith(';'):
 134           m = common.CHECK_RE.match(input_line)
 135           if not m or m.group(1) not in prefix_set:
 136             output_lines.append(input_line)
 137             continue
 138
 139         # Print out the various check lines here.
 140         asm.add_asm_checks(output_lines, ';', run_list, func_dict, func_name)
 141         is_in_function_start = False
 142
 143       if is_in_function:
 144         if common.should_add_line_to_output(input_line, prefix_set):
 145           # This input line of the function body will go as-is into the output.
 146           output_lines.append(input_line)
 147         else:
 148           continue
 149         if input_line.strip() == '}':
 150           is_in_function = False
 151         continue
 152
 153       # Discard any previous script advertising.
 154       if input_line.startswith(ADVERT):
 155         continue
 156
 157       # If it's outside a function, it just gets copied to the output.
 158       output_lines.append(input_line)
 159
 160       m = common.IR_FUNCTION_RE.match(input_line)
 161       if not m:
 162         continue
 163       func_name = m.group(1)
 164       if args.function is not None and func_name != args.function:
 165         # When filtering on a specific function, skip all others.
 166         continue
 167       is_in_function = is_in_function_start = True
 168
 169     if args.verbose:
 170       print>>sys.stderr, 'Writing %d lines to %s...' % (len(output_lines), test)
 171
 172     with open(test, 'wb') as f:
 173       f.writelines([l + '\n' for l in output_lines])
 174
 175
 176 if __name__ == '__main__':
 177   main()