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 E1FB7386F81C; Sat, 11 May 2024 09:02:13 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org E1FB7386F81C 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 E1FB7386F81C 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=1715418135; cv=none; b=gHBuWdiJ1ObUHTF3WXGPb4vcGog2UBpsWoWkYzBmQ/TTCFr5yEmmXuQ9bswKZQvjr7mZFgcQPoBSDQpXgftC0gXTRwDGO5DnM0CGqDxQr+8Hf5sC45d0OUXM85e/41k/HP/ZPjEOSTonOiUB+ufU2ACcTskz96KI2LvSZpsVSgA= ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1715418135; c=relaxed/simple; bh=QYvyzo9GCFR60fTWF8UZijjpf8Fa9x26FbkUTLDehBk=; h=From:To:Subject:Date:Message-ID:MIME-Version; b=PsEXSq2jPxEK8grwi7KJsKT0DvLpmBszB9amZN5+cYc54SWr7/5bfVXu8V+hRDhClyk5emKxOgbbqRt+thhxy66FEBQbcKnKaUkvvnS4N/Jqw2XDbNkreWcBwXG9Zu1UqvI8W/0YAXgjgeaOssGE04MKfv1W+Yo0znDQQXAG0rU= ARC-Authentication-Results: i=1; server2.sourceware.org Received: from pps.filterd (m0247476.ppops.net [127.0.0.1]) by mx0a-00641c01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 44B8t4Ru005058; Sat, 11 May 2024 09:02:13 GMT Received: from mxout22.s.uw.edu (mxout22.s.uw.edu [128.95.242.222]) by mx0a-00641c01.pphosted.com (PPS) with ESMTPS id 3y20h18rer-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 11 May 2024 09:02:13 +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 44B92AjK032659 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sat, 11 May 2024 02:02:10 -0700 X-Auth-Received: from ken-20xw00qgus.dhcp4.washington.edu ([10.154.75.2]) (authenticated authid=kmatsui) by smtp.washington.edu (8.16.1+UW21.10/8.14.4+UW24.02) with ESMTPSA id 44B92ApJ000628 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 11 May 2024 02:02:10 -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 v26 01/13] libstdc++: Optimize std::is_const compilation performance Date: Sat, 11 May 2024 02:01:18 -0700 Message-ID: <20240511090130.248174-1-kmatsui@gcc.gnu.org> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240510161405.194750-21-kmatsui@gcc.gnu.org> References: <20240510161405.194750-21-kmatsui@gcc.gnu.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Proofpoint-GUID: CYYOtDsbf27fMLL594M_b6qhrI6EEPCQ X-Proofpoint-ORIG-GUID: CYYOtDsbf27fMLL594M_b6qhrI6EEPCQ X-outbound-smtp: 1 x-header: uw-relay-non-domains X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.650,FMLib:17.11.176.26 definitions=2024-05-11_04,2024-05-10_02,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 phishscore=0 spamscore=0 clxscore=1034 priorityscore=1501 lowpriorityscore=0 mlxlogscore=683 adultscore=0 impostorscore=0 malwarescore=0 mlxscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2405010000 definitions=main-2405110066 X-Spam-Status: No, score=-13.3 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::is_const by dispatching to the new __is_const built-in trait. libstdc++-v3/ChangeLog: * include/std/type_traits (is_const): Use __is_const built-in trait. (is_const_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 b441bf9908f..8df0cf3ac3b 100644 --- a/libstdc++-v3/include/std/type_traits +++ b/libstdc++-v3/include/std/type_traits @@ -835,6 +835,12 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION // Type properties. /// is_const +#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_const) + template + struct is_const + : public __bool_constant<__is_const(_Tp)> + { }; +#else template struct is_const : public false_type { }; @@ -842,6 +848,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION template struct is_const<_Tp const> : public true_type { }; +#endif /// is_volatile template @@ -3331,10 +3338,15 @@ template inline constexpr bool is_member_pointer_v = is_member_pointer<_Tp>::value; #endif +#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_const) +template + inline constexpr bool is_const_v = __is_const(_Tp); +#else template inline constexpr bool is_const_v = false; template inline constexpr bool is_const_v = true; +#endif #if _GLIBCXX_USE_BUILTIN_TRAIT(__is_function) template -- 2.44.0