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 7113C3858D39; Wed, 21 Feb 2024 09:36:33 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 7113C3858D39 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 7113C3858D39 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=1708508196; cv=none; b=dGGqKLMk8Hv+jNYhrnfuisDoohP7hjhGrF5GpqoyIeE6i8cP6jNmG9AKxdvD0mm/H6wyMBT2v0Cy/l8Q8KhuJozvEEfhOm+CWJpjqHwbC1dUMgVQNf8Cl9BieIlbQ9aHU+TVA5uKLPv6UCkGRpNBNsQ426ChCGuzZqSwipajRsY= ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1708508196; c=relaxed/simple; bh=/d5pYHgmndZQUPM3uuFkM9vlgI/s8JMtr03/Zl99wNM=; h=From:To:Subject:Date:Message-ID:MIME-Version; b=sdSBZut8TdYZ6QMrpq64TP7bG7+CvFHeIdoh/2hMehKM39PDjO2t6PK5NYzjGrcsW3/ckQJ91axglhFnc065dIKxixI0+XGfcn3tGCGlHhqlYkneRkn3jRbVGRsXaXc1jk9UiTjmyhoG1JdmqQPB5vBG/lsRAS6RgVhKFpLS5B4= ARC-Authentication-Results: i=1; server2.sourceware.org Received: from pps.filterd (m0247479.ppops.net [127.0.0.1]) by mx0a-00641c01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 41L9ZxcK004040; Wed, 21 Feb 2024 09:36:33 GMT Received: from mxout22.s.uw.edu (mxout22.s.uw.edu [128.95.242.222]) by mx0a-00641c01.pphosted.com (PPS) with ESMTPS id 3wd56h3437-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 21 Feb 2024 09:36:32 +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+UW24.02) with ESMTP id 41L9aK7E020958 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 21 Feb 2024 01:36:20 -0800 X-Auth-Received: from kmatsui-ThinkPad-X1-Carbon-Gen-9.dhcp4.washington.edu ([10.154.74.128]) (authenticated authid=kmatsui) by smtp.washington.edu (8.16.1+UW21.10/8.14.4+UW24.02) with ESMTPSA id 41L9aJVg002942 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 21 Feb 2024 01:36:20 -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 v13 16/26] libstdc++: Optimize std::add_lvalue_reference compilation performance Date: Wed, 21 Feb 2024 01:36:06 -0800 Message-ID: <20240221093616.4001742-16-kmatsui@gcc.gnu.org> X-Mailer: git-send-email 2.43.2 In-Reply-To: <20240221093616.4001742-1-kmatsui@gcc.gnu.org> References: <20240221085142.3779280-26-kmatsui@gcc.gnu.org> <20240221093616.4001742-1-kmatsui@gcc.gnu.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Proofpoint-GUID: nATLtNEp4eapbP2XF2MRsMv5SDxGiHjv X-Proofpoint-ORIG-GUID: nATLtNEp4eapbP2XF2MRsMv5SDxGiHjv 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=2024-02-20_06,2024-02-20_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 adultscore=0 spamscore=0 bulkscore=0 priorityscore=1501 suspectscore=0 clxscore=1034 mlxlogscore=697 phishscore=0 impostorscore=0 malwarescore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311290000 definitions=main-2402210074 X-Spam-Status: No, score=-13.1 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 34475e6279a..17bf47d59d3 100644 --- a/libstdc++-v3/include/std/type_traits +++ b/libstdc++-v3/include/std/type_traits @@ -1157,6 +1157,11 @@ _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; }; @@ -1164,6 +1169,7 @@ _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; @@ -1731,9 +1737,15 @@ _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 -- 2.43.2