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 5F017384CBBA; Thu, 15 Feb 2024 15:20:57 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 5F017384CBBA 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 5F017384CBBA 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=1708010460; cv=none; b=aIRhtd/cbp1ThvlzW3O6ptjpOtCa2qGlaMa5o1eyDph1TAnKdsONSVurutSZAhUbsB/c2xWNx4P/8S9a7DiBu1Uc7teZNLdRgr+xouygsKJ8jmEuuxGA7fl88Nh+rDv4o/0GrmYD6ASEX5g50+7N/HJLGhryz43PUxmns7MsTuQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1708010460; c=relaxed/simple; bh=t2jAdqwW6QGJBGEY9KIWY7by0tGyR+EA5NyovQUG/HQ=; h=From:To:Subject:Date:Message-ID:MIME-Version; b=gvqRuUZdr40yeKu85DvmSR8qUnOQM25Gx2Jm2LvQDI5RHO+Ul26v5unP2amInYIX9FB5JTjNoae2PDFKisjXi17K7NlUryLregydRtDjy1WNh+3Nq5jL/hW8tn/k1cBO05xoQ3X3NGTVye7VYPDLI3fCx1a5JK+QArI0r2Y5vzo= ARC-Authentication-Results: i=1; server2.sourceware.org Received: from pps.filterd (m0247478.ppops.net [127.0.0.1]) by mx0a-00641c01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 41FFJlk7022836; Thu, 15 Feb 2024 15:20:57 GMT Received: from mxout26.s.uw.edu (mxout26.s.uw.edu [140.142.234.176]) by mx0a-00641c01.pphosted.com (PPS) with ESMTPS id 3w94rewhhp-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 15 Feb 2024 15:20:56 +0000 Received: from smtp.washington.edu (smtp.washington.edu [140.142.234.157]) by mxout26.s.uw.edu (8.14.4+UW20.07/8.14.4+UW24.02) with ESMTP id 41FFKl7V010514 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 15 Feb 2024 07:20:47 -0800 X-Auth-Received: from kmatsui-ThinkPad-X1-Carbon-Gen-9.dhcp4.washington.edu ([10.154.74.143]) (authenticated authid=kmatsui) by smtp.washington.edu (8.16.1+UW21.10/8.14.4+UW24.02) with ESMTPSA id 41FFKkgs029956 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 15 Feb 2024 07:20:47 -0800 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 v5 08/14] libstdc++: Optimize std::add_lvalue_reference compilation performance Date: Thu, 15 Feb 2024 07:20:31 -0800 Message-ID: <20240215152037.720162-8-kmatsui@gcc.gnu.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240215152037.720162-1-kmatsui@gcc.gnu.org> References: <20240215045258.3025806-1-kmatsui@gcc.gnu.org> <20240215152037.720162-1-kmatsui@gcc.gnu.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Proofpoint-ORIG-GUID: qu4gG4nk91X7QzC-jiFA6O3wivGYaogT X-Proofpoint-GUID: qu4gG4nk91X7QzC-jiFA6O3wivGYaogT X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.1011,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-02-15_14,2024-02-14_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 priorityscore=1501 mlxscore=0 malwarescore=0 bulkscore=0 spamscore=0 mlxlogscore=695 lowpriorityscore=0 adultscore=0 suspectscore=0 clxscore=1034 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311290000 definitions=main-2402150123 X-Spam-Status: No, score=-13.2 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,T_SCC_BODY_TEXT_LINE 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 compilation performance of std::add_lvalue_reference by dispatching to the new __add_lvalue_reference built-in trait. libstdc++-v3/ChangeLog: * include/std/type_traits (add_lvalue_reference): Use __add_lvalue_reference built-in trait. (__add_lvalue_reference_helper): 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 2e1cc1c1d5f..1f4e6db72f4 100644 --- a/libstdc++-v3/include/std/type_traits +++ b/libstdc++-v3/include/std/type_traits @@ -1129,6 +1129,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION }; /// @cond undocumented +#if _GLIBCXX_USE_BUILTIN_TRAIT(__add_lvalue_reference) + template + struct __add_lvalue_reference_helper + { using type = __add_lvalue_reference(_Tp); }; +#else template struct __add_lvalue_reference_helper { using type = _Tp; }; @@ -1136,6 +1141,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION template struct __add_lvalue_reference_helper<_Tp, __void_t<_Tp&>> { using type = _Tp&; }; +#endif template using __add_lval_ref_t = typename __add_lvalue_reference_helper<_Tp>::type; @@ -1703,9 +1709,15 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION #endif /// add_lvalue_reference +#if _GLIBCXX_USE_BUILTIN_TRAIT(__add_lvalue_reference) + template + struct add_lvalue_reference + { using type = __add_lvalue_reference(_Tp); }; +#else template struct add_lvalue_reference { using type = __add_lval_ref_t<_Tp>; }; +#endif /// add_rvalue_reference template -- 2.43.0