utils/llvm-gisel-cov.py

   1 #!/usr/bin/env python
   2 """
   3 Summarize the information in the given coverage files.
   4
   5 Emits the number of rules covered or the percentage of rules covered depending
   6 on whether --num-rules has been used to specify the total number of rules.
   7 """
   8
   9 import argparse
  10 import struct
  11
  12 class FileFormatError(Exception):
  13   pass
  14
  15 def backend_int_pair(s):
  16   backend, sep, value = s.partition('=')
  17   if (sep is None):
  18     raise argparse.ArgumentTypeError("'=' missing, expected name=value")
  19   if (not backend):
  20     raise argparse.ArgumentTypeError("Expected name=value")
  21   if (not value):
  22     raise argparse.ArgumentTypeError("Expected name=value")
  23   return backend, int(value)
  24
  25 def main():
  26   parser = argparse.ArgumentParser(description=__doc__)
  27   parser.add_argument('input', nargs='+')
  28   parser.add_argument('--num-rules', type=backend_int_pair, action='append',
  29                       metavar='BACKEND=NUM',
  30                       help='Specify the number of rules for a backend')
  31   args = parser.parse_args()
  32
  33   covered_rules = {}
  34
  35   for input_filename in args.input:
  36     with open(input_filename, 'rb') as input_fh:
  37       data = input_fh.read()
  38       pos = 0
  39       while data:
  40         backend, _, data = data.partition('\0')
  41         pos += len(backend)
  42         pos += 1
  43
  44         if len(backend) == 0:
  45           raise FileFormatError()
  46         backend, = struct.unpack("%ds" % len(backend), backend)
  47
  48         while data:
  49           if len(data) < 8:
  50             raise FileFormatError()
  51           rule_id, = struct.unpack("Q", data[:8])
  52           pos += 8
  53           data = data[8:]
  54           if rule_id == (2 ** 64) - 1:
  55             break
  56           covered_rules[backend] = covered_rules.get(backend, {})
  57           covered_rules[backend][rule_id] = covered_rules[backend].get(rule_id, 0) + 1
  58
  59   num_rules = dict(args.num_rules)
  60   for backend, rules_for_backend in covered_rules.items():
  61     if backend in num_rules:
  62       print "%s: %3.2f%% of rules covered" % (backend, (float(len(rules_for_backend.keys())) / num_rules[backend]) * 100)
  63     else:
  64       print "%s: %d rules covered" % (backend, len(rules_for_backend.keys()))
  65
  66 if __name__ == '__main__':
  67   main()