Merge pull request #9026 from palimondo/SR-4598

[benchmark] Support multiple regular expression filters in Benchmark_Driver

Author: shahmishal

benchmark/scripts/Benchmark_Driver

@@ -121,8 +121,10 @@ def instrument_test(driver_path, test, num_samples):
 def get_tests(driver_path, args):
     """Return a list of available performance tests"""
     tests = subprocess.check_output([driver_path, '--list']).split()[2:]
-    if args.filter:
-        return filter(lambda name: name.startswith(args.filter), tests)
+    if args.filters:
+        regexes = [re.compile(pattern) for pattern in args.filters]
+        return sorted(list(set([name for pattern in regexes
+                                for name in tests if pattern.match(name)])))
     if not args.benchmarks:
         return tests
     return sorted(list(set(tests).intersection(set(args.benchmarks))))
@@ -362,7 +364,7 @@ def positive_int(value):
 
 def main():
     parser = argparse.ArgumentParser(
-        epilog='Example: ./Benchmark_Driver run -i 5 -f Array'
+        epilog='Example: ./Benchmark_Driver run -i 5 -f Prefix -f .*Suffix.*'
     )
     subparsers = parser.add_subparsers(
         title='Swift benchmark driver commands',
@@ -375,8 +377,9 @@ def main():
         default=[],
         help='benchmark to run (default: all)', nargs='*', metavar="BENCHMARK")
     benchmarks_group.add_argument(
-        '-f', '--filter',
-        help='run all tests whose name starts with PREFIX', metavar="PREFIX")
+        '-f', '--filter', dest='filters', action='append',
+        help='run all tests whose name match regular expression PATTERN, ' +
+        'multiple filters are supported', metavar="PATTERN")
     parent_parser.add_argument(
         '-t', '--tests',
         help='directory containing Benchmark_O{,none,unchecked} ' +