From patchwork Fri Oct 13 22:37:21 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ken Matsui X-Patchwork-Id: 152804 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a05:612c:2908:b0:403:3b70:6f57 with SMTP id ib8csp2192888vqb; Fri, 13 Oct 2023 15:46:50 -0700 (PDT) X-Google-Smtp-Source: AGHT+IFxTnBk47sD73EImpRm6pXIY+h5VDKgq41iJ90TRmjaIbMrdL+XChShhkNgVmulFrtwFGYI X-Received: by 2002:a05:6214:d42:b0:66d:113e:5374 with SMTP id 2-20020a0562140d4200b0066d113e5374mr10829561qvr.25.1697237209773; Fri, 13 Oct 2023 15:46:49 -0700 (PDT) ARC-Seal: i=2; a=rsa-sha256; t=1697237209; cv=pass; d=google.com; s=arc-20160816; b=IQsg57A2vmaRJ+d/7Nb0CGsryCg6ryqit2Xj/vJ2DQm3rZNNSOTst7Gyb0HTTuhFn0 xFLfWSQOh4fnUFn7z4N54bwGH6RS1X7+k9biLL6zmTQLEscInyQgHh+Q/6DglHB8MbQH IifWXolUyfFevNHYtUI6zJskatq1qumvxIsujrvtNGIQEGkItPKgNqTuupp8YWqV6OXu kY+PmKAm1aw528WPj3IeYxIi5C1DudoU9t49+ndT09Jd3aOtG4c0wTMHLbUL8MnzJn/1 Urbp1ZIE+f0G1Q5hacgIu+bqaPlIICEqp/971ejdlo40h0ayeDaI5lvV8wDN3c+X+7/s 8n+w== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=errors-to:list-subscribe:list-help:list-post:list-archive :list-unsubscribe:list-id:precedence:content-transfer-encoding :mime-version:references:in-reply-to:message-id:date:subject:cc:to :from:dmarc-filter:arc-filter:delivered-to:dkim-signature :dkim-filter; bh=jTvM8K5VP5nF2Q2x/3Xbn+YFgDUeR1oVEf9nVRR4fTg=; fh=kSSy/oyUXqQD15FLeKdymIgDBFPFITPA1Gj52CNOxRQ=; b=o/V3a2LJ/5KG2gt2QGbrW4Jg8lnhb3WrPwTjoIvyna7sxYMSpNEHxOQm5SW01EtlVw /cIdm7YZjLNVhcKYKiRKRGihsJPrRssZodTuA55tCtjJfGJINqXIXOokEoWaYStMNPka FbOACSAqcOVygo/xgikZNT2wlPstEjySJTWTx2imWn8MqAcQguCs5H2Mj6Rxjwx7xa6W 1d9bl9wX5bSMsa8g+i/MULcfFJRWZJc1H+HanuPnX8+vD7yCqckcLlun8sQQRLhgdcJM 5AIkdjpowHEeYuyd8///lcfRfNRHKuMNOe76svDy4HBjZDIZZKWKJDaKWJhoHwfHUdcw Y7fw== ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@gcc.gnu.org header.s=default header.b=LWl7sp1m; arc=pass (i=1); spf=pass (google.com: domain of gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org designates 2620:52:3:1:0:246e:9693:128c as permitted sender) smtp.mailfrom="gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=gnu.org Received: from server2.sourceware.org (server2.sourceware.org. [2620:52:3:1:0:246e:9693:128c]) by mx.google.com with ESMTPS id ef7-20020a05620a808700b00767b7c58ac4si1922205qkb.605.2023.10.13.15.46.49 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 13 Oct 2023 15:46:49 -0700 (PDT) Received-SPF: pass (google.com: domain of gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org designates 2620:52:3:1:0:246e:9693:128c as permitted sender) client-ip=2620:52:3:1:0:246e:9693:128c; Authentication-Results: mx.google.com; dkim=pass header.i=@gcc.gnu.org header.s=default header.b=LWl7sp1m; arc=pass (i=1); spf=pass (google.com: domain of gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org designates 2620:52:3:1:0:246e:9693:128c as permitted sender) smtp.mailfrom="gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=gnu.org Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 7CD563856DF8 for ; Fri, 13 Oct 2023 22:46:44 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 7CD563856DF8 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1697237204; bh=jTvM8K5VP5nF2Q2x/3Xbn+YFgDUeR1oVEf9nVRR4fTg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=LWl7sp1mNloi6K8B96wSxXOwFpVU39ZVAePNBakQk2xruewaEmXFATd5ArDJgVDcz 8/PUi3j61vm0PJinuvqXz8M187mMZCzWRydPb6p4kSwp17j3HaODFAQaA/KAMUkwTm wYpG5nLgipOBRuI7yvxJfn+qwzj89RQnE5TTKVmw= X-Original-To: gcc-patches@gcc.gnu.org Delivered-To: gcc-patches@gcc.gnu.org Received: from mx0a-00641c01.pphosted.com (mx0a-00641c01.pphosted.com [205.220.165.146]) by sourceware.org (Postfix) with ESMTPS id 551DD3856DD5; Fri, 13 Oct 2023 22:43:16 +0000 (GMT) ARC-Filter: OpenARC Filter v1.0.0 sourceware.org 551DD3856DD5 Authentication-Results: server2.sourceware.org; arc=none smtp.remote-ip=205.220.165.146 ARC-Seal: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1697237002; cv=none; b=Tdl2GGy/9Srs3b77Eu7pv5rxde9M8CTaiuGB/st0Z6sYYKQUesX6jakuIaoOuacsi+vQN88ezY1A5ktXZqNwR9xg0JQO2vMKoGoYInjJFLGwfG5YVm4Qhk4mxRGZc1ZP9Miwaa46QQWiL2dRI2vVgO3yvy2c7Q0hAKyNr+nTa6E= ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1697237002; c=relaxed/simple; bh=C0QfeWKCr4uUzOqn+4ufr8dEtmbXQAN/FqKqiHue+Tc=; h=From:To:Subject:Date:Message-ID:MIME-Version; b=NpGVQdsa5IyzA8trOt2qghR2sLm98ZoRCUX5GlpuvyaOFJ5gJbmI+tfldg5fdu/28Rvp3KVgtt0XspckNFmoruHwX4ipCvF3OxEjEmvWGmXEiwY9CnK5gxM5yQWfPxRcbYkGvuH6UMilHMhR3+/JvPCDR2vNmYM/mJ7zFkF65Y0= ARC-Authentication-Results: i=1; server2.sourceware.org DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 551DD3856DD5 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 Received: from pps.filterd (m0247472.ppops.net [127.0.0.1]) by mx0a-00641c01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 39DMgiqh001139; Fri, 13 Oct 2023 22:43:15 GMT Received: from mxout23.cac.washington.edu (mxout23.cac.washington.edu [140.142.32.140]) by mx0a-00641c01.pphosted.com (PPS) with ESMTPS id 3tqdeqrtsu-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 13 Oct 2023 22:43:15 +0000 Received: from smtp.washington.edu (smtp.washington.edu [128.208.60.54]) by mxout23.cac.washington.edu (8.14.4+UW20.07/8.14.4+UW22.04) with ESMTP id 39DMh15x001531 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 13 Oct 2023 15:43:01 -0700 X-Auth-Received: from kmatsui-ThinkPad-X1-Carbon-Gen-9.dhcp4.washington.edu ([10.19.18.191]) (authenticated authid=kmatsui) by smtp.washington.edu (8.16.1+UW21.10/8.14.4+UW19.10) with ESMTPSA id 39DMdx1K016619 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 13 Oct 2023 15:43:01 -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 v19 07/40] libstdc++: Optimize is_volatile trait performance Date: Fri, 13 Oct 2023 15:37:21 -0700 Message-ID: <20231013223957.1634024-8-kmatsui@gcc.gnu.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231013223957.1634024-1-kmatsui@gcc.gnu.org> References: <20231013211206.1215663-1-kmatsui@gcc.gnu.org> <20231013223957.1634024-1-kmatsui@gcc.gnu.org> MIME-Version: 1.0 X-Proofpoint-ORIG-GUID: 7jyEK_DsyEkAqu-rfNDM48Ey4acM_JDS X-Proofpoint-GUID: 7jyEK_DsyEkAqu-rfNDM48Ey4acM_JDS X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.980,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-10-13_12,2023-10-12_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 lowpriorityscore=0 impostorscore=0 mlxlogscore=762 phishscore=0 mlxscore=0 clxscore=1034 priorityscore=1501 suspectscore=0 spamscore=0 bulkscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2309180000 definitions=main-2310130198 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 autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: gcc-patches@gcc.gnu.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1776997095680917896 X-GMAIL-MSGID: 1779682204788459391 This patch optimizes the performance of the is_volatile trait 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 686e38e47c3..c01f65df22b 100644 --- a/libstdc++-v3/include/std/type_traits +++ b/libstdc++-v3/include/std/type_traits @@ -800,6 +800,12 @@ _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 { }; @@ -807,6 +813,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION template struct is_volatile<_Tp volatile> : public true_type { }; +#endif /// is_trivial template @@ -3236,10 +3243,15 @@ template inline constexpr bool is_const_v = true; #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);