From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0a-00641c01.pphosted.com (mx0a-00641c01.pphosted.com [205.220.165.146]) by sourceware.org (Postfix) with ESMTPS id C2E863857019; Tue, 12 Sep 2023 00:19:49 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org C2E863857019 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 Received: from pps.filterd (m0247472.ppops.net [127.0.0.1]) by mx0a-00641c01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 38C0Jbcv032603; Tue, 12 Sep 2023 00:19:48 GMT Received: from mxout25.s.uw.edu (mxout25.s.uw.edu [140.142.234.175]) by mx0a-00641c01.pphosted.com (PPS) with ESMTPS id 3t2bxcrmbk-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 12 Sep 2023 00:19:48 +0000 Received: from smtp.washington.edu (smtp.washington.edu [128.208.60.132]) by mxout25.s.uw.edu (8.14.4+UW20.07/8.14.4+UW22.04) with ESMTP id 38C0JPMj030652 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 11 Sep 2023 17:19:25 -0700 X-Auth-Received: from localhost.localdomain ([10.154.74.234]) (authenticated authid=kmatsui) by smtp.washington.edu (8.16.1+UW21.10/8.14.4+UW19.10) with ESMTPSA id 38C0HwGg005562 (version=TLSv1.2 cipher=DHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT); Mon, 11 Sep 2023 17:19:25 -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 2/2] libstdc++: Optimize is_scoped_enum trait performance Date: Mon, 11 Sep 2023 17:16:06 -0700 Message-ID: <20230912001756.87388-3-kmatsui@gcc.gnu.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20230912001756.87388-1-kmatsui@gcc.gnu.org> References: <20230912001756.87388-1-kmatsui@gcc.gnu.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Proofpoint-ORIG-GUID: SFNJAzI7w46KtTnNpwBp9p1Ef3Gt6W6s X-Proofpoint-GUID: SFNJAzI7w46KtTnNpwBp9p1Ef3Gt6W6s X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.267,Aquarius:18.0.957,Hydra:6.0.601,FMLib:17.11.176.26 definitions=2023-09-11_19,2023-09-05_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=895 suspectscore=0 phishscore=0 impostorscore=0 mlxscore=0 bulkscore=0 spamscore=0 adultscore=0 lowpriorityscore=0 priorityscore=1501 clxscore=1034 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2308100000 definitions=main-2309120001 X-Spam-Status: No, score=-12.9 required=5.0 tests=BAYES_00,GIT_PATCH_0,JMQ_SPF_NEUTRAL,KAM_DMARC_STATUS,RCVD_IN_DNSWL_LOW,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_scoped_enum trait by dispatching to the new __is_scoped_enum built-in trait. libstdc++-v3/ChangeLog: * include/std/type_traits (is_scoped_enum): Use __is_scoped_enum built-in trait. (is_scoped_enum_v): Likewise. Signed-off-by: Ken Matsui --- libstdc++-v3/include/std/type_traits | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/libstdc++-v3/include/std/type_traits b/libstdc++-v3/include/std/type_traits index 677cd934b94..26ae491fa69 100644 --- a/libstdc++-v3/include/std/type_traits +++ b/libstdc++-v3/include/std/type_traits @@ -3585,6 +3585,12 @@ template /// True if the type is a scoped enumeration type. /// @since C++23 +# if _GLIBCXX_USE_BUILTIN_TRAIT(__is_scoped_enum) + template + struct is_scoped_enum + : bool_constant<__is_scoped_enum(_Tp)> + { }; +# else template struct is_scoped_enum : false_type @@ -3596,11 +3602,17 @@ template struct is_scoped_enum<_Tp> : bool_constant { }; +# endif /// @ingroup variable_templates /// @since C++23 +# if _GLIBCXX_USE_BUILTIN_TRAIT(__is_scoped_enum) + template + inline constexpr bool is_scoped_enum_v = __is_scoped_enum(_Tp); +# else template inline constexpr bool is_scoped_enum_v = is_scoped_enum<_Tp>::value; +# endif #endif #ifdef __cpp_lib_reference_from_temporary // C++ >= 23 && ref_{converts,constructs}_from_temp -- 2.42.0