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 A8E1E3858C52; Thu, 2 May 2024 16:16:33 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org A8E1E3858C52 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 A8E1E3858C52 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=1714666595; cv=none; b=C5HnLUjWYiaErXjBPwdwpOOuh7RSEmPFHO1JK8TVm+JV+n3MDe38mrsIIPiTWY0fNcyi9EI2cSMun5XdsSJNcBPB2L3NBfonhTyKYh1RdZ7SmP5N8swP4tIdpT7LqbWbTnJYaLyLc17qgT1clVQ7Nc5N/2N4vd0OQLYoXSU8t4g= ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1714666595; c=relaxed/simple; bh=2M8x3fS5GlYS1VALiyF93wfrOvcvWUcTOr+hq/C1qAo=; h=From:To:Subject:Date:Message-ID:MIME-Version; b=AOsjmkrBSWSgVXMV2/SXiM8lj2PMKM+p+HJSQkjo56XOT5r0iRGKC9KN3aozlu6beOpE0BXVaQok7+5nPUjQZ9EZg/tp4Rfho5n5OKo1c0KgfcYKsmXA9bPvNM23aIomAatzDglHZtgg+RDLIATiTKNBBWkmK5dsrSRCYoHUu0Q= ARC-Authentication-Results: i=1; server2.sourceware.org Received: from pps.filterd (m0247480.ppops.net [127.0.0.1]) by mx0a-00641c01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 442GCEs4018589; Thu, 2 May 2024 16:16:33 GMT Received: from mxout22.s.uw.edu (mxout22.s.uw.edu [128.95.242.222]) by mx0a-00641c01.pphosted.com (PPS) with ESMTPS id 3xv4e3befs-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 02 May 2024 16:16:32 +0000 (GMT) Received: from smtp.washington.edu (smtp.washington.edu [128.208.60.54]) by mxout22.s.uw.edu (8.14.4+UW20.07/8.14.4+UW24.02) with ESMTP id 442GGGHw003513 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 2 May 2024 09:16:16 -0700 X-Auth-Received: from ken-20xw00qgus.dhcp4.washington.edu ([10.154.75.239]) (authenticated authid=kmatsui) by smtp.washington.edu (8.16.1+UW21.10/8.14.4+UW24.02) with ESMTPSA id 442GGFov023119 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 2 May 2024 09:16:16 -0700 X-UW-Orig-Sender: kmatsui@smtp.washington.edu From: Ken Matsui To: gcc-patches@gcc.gnu.org Cc: libstdc++@gcc.gnu.org, jason@redhat.com, Ken Matsui Subject: [PATCH v16 18/26] libstdc++: Optimize std::add_rvalue_reference compilation performance Date: Thu, 2 May 2024 09:13:44 -0700 Message-ID: <20240502161614.3705912-19-kmatsui@gcc.gnu.org> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240502161614.3705912-1-kmatsui@gcc.gnu.org> References: <20240228192843.188979-1-kmatsui@gcc.gnu.org> <20240502161614.3705912-1-kmatsui@gcc.gnu.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Proofpoint-ORIG-GUID: fz7N4L8cJEyK3lV6_zbZDY-G8tnWvQEF X-Proofpoint-GUID: fz7N4L8cJEyK3lV6_zbZDY-G8tnWvQEF X-outbound-smtp: 1 x-header: uw-relay-non-domains X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1011,Hydra:6.0.650,FMLib:17.11.176.26 definitions=2024-05-02_05,2024-05-02_03,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 malwarescore=0 suspectscore=0 phishscore=0 impostorscore=0 spamscore=0 clxscore=1034 bulkscore=0 lowpriorityscore=0 mlxlogscore=782 priorityscore=1501 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2404010003 definitions=main-2405020106 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,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 compilation performance of std::add_rvalue_reference by dispatching to the new __builtin_add_rvalue_reference trait. libstdc++-v3/ChangeLog: * include/std/type_traits (add_rvalue_reference): Use __builtin_add_rvalue_reference trait. (__add_rvalue_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 4e97e45f130..36ac900605a 100644 --- a/libstdc++-v3/include/std/type_traits +++ b/libstdc++-v3/include/std/type_traits @@ -1185,6 +1185,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION }; /// @cond undocumented +#if _GLIBCXX_USE_BUILTIN_TRAIT(__builtin_add_rvalue_reference) + template + struct __add_rvalue_reference_helper + { using type = __builtin_add_rvalue_reference(_Tp); }; +#else template struct __add_rvalue_reference_helper { using type = _Tp; }; @@ -1192,6 +1197,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION template struct __add_rvalue_reference_helper<_Tp, __void_t<_Tp&&>> { using type = _Tp&&; }; +#endif template using __add_rval_ref_t = typename __add_rvalue_reference_helper<_Tp>::type; @@ -1748,9 +1754,15 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION #endif /// add_rvalue_reference +#if _GLIBCXX_USE_BUILTIN_TRAIT(__builtin_add_rvalue_reference) + template + struct add_rvalue_reference + { using type = __builtin_add_rvalue_reference(_Tp); }; +#else template struct add_rvalue_reference { using type = __add_rval_ref_t<_Tp>; }; +#endif #if __cplusplus > 201103L /// Alias template for remove_reference -- 2.44.0