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 D42103858025; Fri, 13 Oct 2023 22:43:15 +0000 (GMT) ARC-Filter: OpenARC Filter v1.0.0 sourceware.org D42103858025 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=1697236998; cv=none; b=sjqlG5H/Aw/z5Li1LMqbNMh+2nF490Y9u2HHP1ReFunnzIaBpbJRIsE6mFSweiEGhEBg04C7xpjk0Lsp4LinhNAEPnLuxlmHHFWdMVrO0m9mLzNP8vfkrXLjoHxgA8Mg/SXlQGEBAR/4s3rpJsZnL7L+J2ALTZl6YJCmixukPFE= ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1697236998; c=relaxed/simple; bh=Cijkk+1KKS2ERennoIfTZ8dR0bWLbMoE2sdRxU4V8ZU=; h=From:To:Subject:Date:Message-ID:MIME-Version; b=c8/yGnWRCNCyW2HCZghgsC9tWk8gi9VU7foB6q8b6xoj/8/jDZggMSRtWvdxi7LyUVvZxSTRJ8pimBYKFdlxReziDegnotU5sz3Ofw9KuhBtlxyv8Ed+xFj5FEyuBFnxftGymFvYLj3KRLgg0i280Lt5dxqTyQ5DAlkRO7TKD/8= ARC-Authentication-Results: i=1; server2.sourceware.org DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org D42103858025 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 (m0247481.ppops.net [127.0.0.1]) by mx0a-00641c01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 39DMdxxD029917; Fri, 13 Oct 2023 22:43:15 GMT Received: from mxout22.s.uw.edu (mxout22.s.uw.edu [128.95.242.222]) by mx0a-00641c01.pphosted.com (PPS) with ESMTPS id 3tqb8ma0md-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 mxout22.s.uw.edu (8.14.4+UW20.07/8.14.4+UW22.04) with ESMTP id 39DMh1tN021531 (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 39DMdx1O016619 (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 11/40] libstdc++: Optimize is_unbounded_array trait performance Date: Fri, 13 Oct 2023 15:37:25 -0700 Message-ID: <20231013223957.1634024-12-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 Content-Transfer-Encoding: 8bit X-Proofpoint-ORIG-GUID: 7z_7tWmsNxk05Ytsdbs01WL6tTKowEzV X-Proofpoint-GUID: 7z_7tWmsNxk05Ytsdbs01WL6tTKowEzV 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 clxscore=1034 suspectscore=0 malwarescore=0 lowpriorityscore=0 bulkscore=0 mlxlogscore=628 impostorscore=0 priorityscore=1501 mlxscore=0 spamscore=0 adultscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2309180000 definitions=main-2310130197 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,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 performance of the is_unbounded_array trait by dispatching to the new __is_unbounded_array built-in trait. libstdc++-v3/ChangeLog: * include/std/type_traits (is_unbounded_array_v): Use __is_unbounded_array built-in trait. Signed-off-by: Ken Matsui --- libstdc++-v3/include/std/type_traits | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/libstdc++-v3/include/std/type_traits b/libstdc++-v3/include/std/type_traits index 4e8165e5af5..cb3d9e238fa 100644 --- a/libstdc++-v3/include/std/type_traits +++ b/libstdc++-v3/include/std/type_traits @@ -3541,11 +3541,16 @@ template /// True for a type that is an array of unknown bound. /// @ingroup variable_templates /// @since C++20 +# if _GLIBCXX_USE_BUILTIN_TRAIT(__is_unbounded_array) + template + inline constexpr bool is_unbounded_array_v = __is_unbounded_array(_Tp); +# else template inline constexpr bool is_unbounded_array_v = false; template inline constexpr bool is_unbounded_array_v<_Tp[]> = true; +# endif /// True for a type that is an array of known bound. /// @since C++20 -- 2.42.0