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 52D96386480A; Sat, 23 Dec 2023 22:06:56 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 52D96386480A 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 52D96386480A 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=1703369217; cv=none; b=rtLSQ1yX8k6B4FXgpN+0FqcrtiaK53930Tq/7gywgQvU2J4IoN/BjXyFFLsH0R7HDLriEAN2M8Cl90E/hIcv7xx62WTEhoPOBfJyPIJ1JS12uPsAvBmCgW+IoIkHrMLwuwmngO5RYz65m2ijABYMbTkMGIVeN+avxZ0XL+mAWhU= ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1703369217; c=relaxed/simple; bh=9cdwRjV/xiTE1ek+rx8t6QJmRrfz93n0LsUukxj3HaY=; h=From:To:Subject:Date:Message-ID:MIME-Version; b=YzirElD5MPSz/RNuD2FAGvYxz1iTm6AKBD4wnBfyK+FTgLlWpg0heCz18IaJWq+1R31ls8GphycmoVo6F+OL6V1xqozOCdKNxWB79FIk8ViOCs+ymuRaVOw42UoLfdzkiKS4JcOYWhEBah80a18vQ7QxBZFKy0C4ZnIt7CebaX0= 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 3BNM6uNd015926; Sat, 23 Dec 2023 22:06:56 GMT Received: from mxout21.s.uw.edu (mxout21.s.uw.edu [140.142.32.139]) by mx0a-00641c01.pphosted.com (PPS) with ESMTPS id 3v5rwru594-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 23 Dec 2023 22:06:55 +0000 Received: from smtp.washington.edu (smtp.washington.edu [128.208.60.54]) by mxout21.s.uw.edu (8.14.4+UW20.07/8.14.4+UW22.04) with ESMTP id 3BNM6YBP019745 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sat, 23 Dec 2023 14:06:34 -0800 X-Auth-Received: from kmatsui-ThinkPad-X1-Carbon-Gen-9.dhcp4.washington.edu ([10.154.74.194]) (authenticated authid=kmatsui) by smtp.washington.edu (8.16.1+UW21.10/8.14.4+UW19.10) with ESMTPSA id 3BNM4Y27011837 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 23 Dec 2023 14:06:34 -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 v2 4/8] libstdc++: Optimize std::is_volatile compilation performance Date: Sat, 23 Dec 2023 14:02:45 -0800 Message-ID: <20231223220432.712093-5-kmatsui@gcc.gnu.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20231223220432.712093-1-kmatsui@gcc.gnu.org> References: <20231223220432.712093-1-kmatsui@gcc.gnu.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Proofpoint-ORIG-GUID: xJvdC1Gnq-mquQBBy66aE4zezPzFbEhO X-Proofpoint-GUID: xJvdC1Gnq-mquQBBy66aE4zezPzFbEhO X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.997,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-12-23_10,2023-12-22_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 mlxscore=0 mlxlogscore=721 priorityscore=1501 malwarescore=0 bulkscore=0 suspectscore=0 spamscore=0 lowpriorityscore=0 clxscore=1034 adultscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311290000 definitions=main-2312230175 X-Spam-Status: No, score=-12.8 required=5.0 tests=BAYES_00,GIT_PATCH_0,JMQ_SPF_NEUTRAL,KAM_DMARC_STATUS,RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H2,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::is_volatile by dispatching to the new __is_volatile built-in trait. libstdc++-v3/ChangeLog: * include/std/type_traits (is_volatile): Use __is_volatile built-in trait. (is_volatile_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 f40831de838..30b0778e58a 100644 --- a/libstdc++-v3/include/std/type_traits +++ b/libstdc++-v3/include/std/type_traits @@ -851,6 +851,12 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION #endif /// is_volatile +#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_volatile) + template + struct is_volatile + : public __bool_constant<__is_volatile(_Tp)> + { }; +#else template struct is_volatile : public false_type { }; @@ -858,6 +864,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION template struct is_volatile<_Tp volatile> : public true_type { }; +#endif /// is_trivial template @@ -3344,10 +3351,15 @@ template inline constexpr bool is_function_v<_Tp&&> = false; #endif +#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_volatile) +template + inline constexpr bool is_volatile_v = __is_volatile(_Tp); +#else template inline constexpr bool is_volatile_v = false; template inline constexpr bool is_volatile_v = true; +#endif template inline constexpr bool is_trivial_v = __is_trivial(_Tp); -- 2.43.0