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[8.43.85.97]) by mx.google.com with ESMTPS id a8-20020a17090682c800b00992c195ac80si7544548ejy.357.2023.09.11.17.21.39 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 11 Sep 2023 17:21:39 -0700 (PDT) Received-SPF: pass (google.com: domain of gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org designates 8.43.85.97 as permitted sender) client-ip=8.43.85.97; Authentication-Results: mx.google.com; dkim=pass header.i=@gcc.gnu.org header.s=default header.b="NS/zuSFC"; spf=pass (google.com: domain of gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org designates 8.43.85.97 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 290473856969 for ; Tue, 12 Sep 2023 00:20:51 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 290473856969 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1694478051; bh=sKENuJafja7SZv2lO7sP0dzd5t3aBGUHiIlJJQ6nb7g=; h=To:Cc:Subject:Date:In-Reply-To:References:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From:Reply-To:From; b=NS/zuSFCPEpU2vY3lEvy8BVLXzHATaMN6o4zjKn2lTzHMFUlVN+kp+4XIpl8DrzTW vUx7TWBHGknAyNayfg+sIdcvUrKjTr9QntnU7GOSBG5WPWINPUU44rU3b+rtZHolXY jywNtCd4LJU0q53QvhTnlGlo+5Pk4zSedHtko9xg= 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 C2E863857019; Tue, 12 Sep 2023 00:19:49 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org C2E863857019 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 38C0Jbcv032603; Tue, 12 Sep 2023 00:19:48 GMT Received: from mxout25.s.uw.edu (mxout25.s.uw.edu [140.142.234.175]) by mx0a-00641c01.pphosted.com (PPS) with ESMTPS id 3t2bxcrmbk-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 12 Sep 2023 00:19:48 +0000 Received: from smtp.washington.edu (smtp.washington.edu [128.208.60.132]) by mxout25.s.uw.edu (8.14.4+UW20.07/8.14.4+UW22.04) with ESMTP id 38C0JPMj030652 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 11 Sep 2023 17:19:25 -0700 X-Auth-Received: from localhost.localdomain ([10.154.74.234]) (authenticated authid=kmatsui) by smtp.washington.edu (8.16.1+UW21.10/8.14.4+UW19.10) with ESMTPSA id 38C0HwGg005562 (version=TLSv1.2 cipher=DHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT); Mon, 11 Sep 2023 17:19:25 -0700 X-UW-Orig-Sender: kmatsui@smtp.washington.edu To: gcc-patches@gcc.gnu.org Cc: libstdc++@gcc.gnu.org, Ken Matsui Subject: [PATCH 2/2] libstdc++: Optimize is_scoped_enum trait performance Date: Mon, 11 Sep 2023 17:16:06 -0700 Message-ID: <20230912001756.87388-3-kmatsui@gcc.gnu.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20230912001756.87388-1-kmatsui@gcc.gnu.org> References: <20230912001756.87388-1-kmatsui@gcc.gnu.org> MIME-Version: 1.0 X-Proofpoint-ORIG-GUID: SFNJAzI7w46KtTnNpwBp9p1Ef3Gt6W6s X-Proofpoint-GUID: SFNJAzI7w46KtTnNpwBp9p1Ef3Gt6W6s X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.267,Aquarius:18.0.957,Hydra:6.0.601,FMLib:17.11.176.26 definitions=2023-09-11_19,2023-09-05_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=895 suspectscore=0 phishscore=0 impostorscore=0 mlxscore=0 bulkscore=0 spamscore=0 adultscore=0 lowpriorityscore=0 priorityscore=1501 clxscore=1034 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2308100000 definitions=main-2309120001 X-Spam-Status: No, score=-12.9 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: , X-Patchwork-Original-From: Ken Matsui via Gcc-patches From: Ken Matsui Reply-To: Ken Matsui Errors-To: gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org Sender: "Gcc-patches" X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1776789068067158532 X-GMAIL-MSGID: 1776789068067158532 This patch optimizes the performance of the is_scoped_enum trait by dispatching to the new __is_scoped_enum built-in trait. libstdc++-v3/ChangeLog: * include/std/type_traits (is_scoped_enum): Use __is_scoped_enum built-in trait. (is_scoped_enum_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 677cd934b94..26ae491fa69 100644 --- a/libstdc++-v3/include/std/type_traits +++ b/libstdc++-v3/include/std/type_traits @@ -3585,6 +3585,12 @@ template /// True if the type is a scoped enumeration type. /// @since C++23 +# if _GLIBCXX_USE_BUILTIN_TRAIT(__is_scoped_enum) + template + struct is_scoped_enum + : bool_constant<__is_scoped_enum(_Tp)> + { }; +# else template struct is_scoped_enum : false_type @@ -3596,11 +3602,17 @@ template struct is_scoped_enum<_Tp> : bool_constant { }; +# endif /// @ingroup variable_templates /// @since C++23 +# if _GLIBCXX_USE_BUILTIN_TRAIT(__is_scoped_enum) + template + inline constexpr bool is_scoped_enum_v = __is_scoped_enum(_Tp); +# else template inline constexpr bool is_scoped_enum_v = is_scoped_enum<_Tp>::value; +# endif #endif #ifdef __cpp_lib_reference_from_temporary // C++ >= 23 && ref_{converts,constructs}_from_temp