Backport P0 filter commit.

benchmarks/scripts/cccl/bench/search.py

@@ -49,7 +49,7 @@ def parse_arguments():
         '--list-benches', action=argparse.BooleanOptionalAction, help="Show available benchmarks.")
     parser.add_argument('--num-shards', type=int, default=1, help='Split benchmarks into M pieces and only run one')
     parser.add_argument('--run-shard', type=int, default=0, help='Run shard N / M of benchmarks')
-    parser.add_argument('-P0', action=argparse.BooleanOptionalAction, help="Run P0 benchmarks (overwrites -R)")
+    parser.add_argument('-P0', action=argparse.BooleanOptionalAction, help="Run P0 benchmarks")
     return parser.parse_args()
 
 
@@ -64,16 +64,18 @@ def run_benches(algnames, sub_space, seeker):
             print("#### ERROR exception occured while running {}: '{}'".format(algname, e))
 
 
+def filter_benchmarks_by_regex(benchmarks, R):
+    pattern = re.compile(R)
+    return list(filter(lambda x: pattern.match(x), benchmarks))
+
+
 def filter_benchmarks(benchmarks, args):
     if args.run_shard >= args.num_shards:
         raise ValueError('run-shard must be less than num-shards')
 
-    R = args.R
+    algnames = filter_benchmarks_by_regex(benchmarks.keys(), args.R)
     if args.P0:
-        R = '^(?!.*segmented).*(scan|reduce|select|sort).*'
-
-    pattern = re.compile(R)
-    algnames = list(filter(lambda x: pattern.match(x), benchmarks.keys()))
+        algnames = filter_benchmarks_by_regex(algnames, '^(?!.*segmented).*(scan|reduce|select|sort).*')
     algnames.sort()
 
     if args.num_shards > 1: