From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0b-00641c01.pphosted.com (mx0b-00641c01.pphosted.com [205.220.177.146]) by sourceware.org (Postfix) with ESMTPS id C8ACB3857016; Mon, 16 Oct 2023 00:14:45 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org C8ACB3857016 Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=gcc.gnu.org Authentication-Results: sourceware.org; spf=fail smtp.mailfrom=gcc.gnu.org ARC-Filter: OpenARC Filter v1.0.0 sourceware.org C8ACB3857016 Authentication-Results: server2.sourceware.org; arc=none smtp.remote-ip=205.220.177.146 ARC-Seal: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1697415287; cv=none; b=YL8zibAi9JiFXZUvXtmlfNMHP9xSosfBLHkhyJDniYgOjcbAfGJLVfRfKj/GtqPqHf0HEYs0IgjfHwo7TiShGqCb9GDRjsRfxuGaDYTPXaLv13q1mp9k025Bw4LGsCAxL6iwaQtHm70V/dKEBYQdido0Uy+qHnvwhsAvFpNIxIY= ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1697415287; c=relaxed/simple; bh=yZDHLGphd8jxjnk42PZPq1zND4PhrwWhUcJ7anaWSLE=; h=From:To:Subject:Date:Message-ID:MIME-Version; b=lCnM5iAwejTG+bE+L5sG1cYbxSKcTEifnODCNUcS3BRfhLOYyauTETyfKgvn/7jEhIkpudhoi/gWo0ejd5ODFw4zIvAZenMY8PIPEC4o5v8hBtWoZq64szRr9VYbEMTjLj/q8jQSG1ITxpx4/hTKVWGj2mE5oVb2g/zLhKBgn5w= ARC-Authentication-Results: i=1; server2.sourceware.org Received: from pps.filterd (m0247477.ppops.net [127.0.0.1]) by mx0a-00641c01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 39G0CTT0012279; Mon, 16 Oct 2023 00:14:45 GMT Received: from mxout22.s.uw.edu (mxout22.s.uw.edu [128.95.242.222]) by mx0a-00641c01.pphosted.com (PPS) with ESMTPS id 3tr4kq4d32-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 16 Oct 2023 00:14:45 +0000 Received: from smtp.washington.edu (smtp.washington.edu [128.208.60.132]) by mxout22.s.uw.edu (8.14.4+UW20.07/8.14.4+UW22.04) with ESMTP id 39G0EGIT016537 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sun, 15 Oct 2023 17:14:16 -0700 X-Auth-Received: from kmatsui-ThinkPad-X1-Carbon-Gen-9.dhcp4.washington.edu ([10.19.18.191]) (authenticated authid=kmatsui) by smtp.washington.edu (8.16.1+UW21.10/8.14.4+UW19.10) with ESMTPSA id 39G0CSsU032329 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sun, 15 Oct 2023 17:14:16 -0700 X-UW-Orig-Sender: kmatsui@smtp.washington.edu From: Ken Matsui To: gcc-patches@gcc.gnu.org Cc: libstdc++@gcc.gnu.org, Ken Matsui Subject: [PATCH v20 40/40] libstdc++: Optimize is_scalar trait performance Date: Sun, 15 Oct 2023 17:10:24 -0700 Message-ID: <20231016001227.2717180-41-kmatsui@gcc.gnu.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231016001227.2717180-1-kmatsui@gcc.gnu.org> References: <20231013223957.1634024-1-kmatsui@gcc.gnu.org> <20231016001227.2717180-1-kmatsui@gcc.gnu.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Proofpoint-ORIG-GUID: Akwm3DZYGQj0UxfHgTrwXAxjuA87QpLJ X-Proofpoint-GUID: Akwm3DZYGQj0UxfHgTrwXAxjuA87QpLJ X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.980,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-10-15_09,2023-10-12_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 bulkscore=0 adultscore=0 mlxlogscore=671 priorityscore=1501 impostorscore=0 clxscore=1034 spamscore=0 phishscore=0 suspectscore=0 mlxscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2309180000 definitions=main-2310160000 X-Spam-Status: No, score=-13.0 required=5.0 tests=BAYES_00,GIT_PATCH_0,JMQ_SPF_NEUTRAL,KAM_DMARC_STATUS,RCVD_IN_DNSWL_LOW,RCVD_IN_MSPIKE_H2,SPF_HELO_NONE,SPF_NEUTRAL,TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: This patch optimizes the performance of the is_scalar trait by dispatching to the new __is_scalar built-in trait. libstdc++-v3/ChangeLog: * include/std/type_traits (is_scalar): Use __is_scalar built-in trait. (is_scalar_v): Likewise. Signed-off-by: Ken Matsui --- libstdc++-v3/include/std/type_traits | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/libstdc++-v3/include/std/type_traits b/libstdc++-v3/include/std/type_traits index 7e93923f44b..eb16a642575 100644 --- a/libstdc++-v3/include/std/type_traits +++ b/libstdc++-v3/include/std/type_traits @@ -775,11 +775,18 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION struct is_member_pointer; /// is_scalar +#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_scalar) + template + struct is_scalar + : public __bool_constant<__is_scalar(_Tp)> + { }; +#else template struct is_scalar : public __or_, is_enum<_Tp>, is_pointer<_Tp>, is_member_pointer<_Tp>, is_null_pointer<_Tp>>::type { }; +#endif /// is_compound template @@ -3398,8 +3405,14 @@ template inline constexpr bool is_object_v = is_object<_Tp>::value; #endif +#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_scalar) +template + inline constexpr bool is_scalar_v = __is_scalar(_Tp); +#else template inline constexpr bool is_scalar_v = is_scalar<_Tp>::value; +#endif + template inline constexpr bool is_compound_v = !is_fundamental_v<_Tp>; -- 2.42.0