From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0a-00641c01.pphosted.com (mx0a-00641c01.pphosted.com [205.220.165.146]) by sourceware.org (Postfix) with ESMTPS id 222883857BB3; Fri, 1 Sep 2023 11:28:43 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 222883857BB3 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 (m0247470.ppops.net [127.0.0.1]) by mx0a-00641c01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 381BLqQb026311; Fri, 1 Sep 2023 11:28:42 GMT Received: from mxout26.s.uw.edu (mxout26.s.uw.edu [140.142.234.176]) by mx0a-00641c01.pphosted.com (PPS) with ESMTPS id 3sudt60a97-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 01 Sep 2023 11:28:42 +0000 Received: from smtp.washington.edu (smtp.washington.edu [128.208.60.132]) by mxout26.s.uw.edu (8.14.4+UW20.07/8.14.4+UW22.04) with ESMTP id 381BSRpX024204 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 1 Sep 2023 04:28:28 -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 381BPGtG005776 (version=TLSv1.2 cipher=DHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT); Fri, 1 Sep 2023 04:28:27 -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 v5 4/4] libstdc++: Optimize is_compound trait performance Date: Fri, 1 Sep 2023 04:25:10 -0700 Message-ID: <20230901112510.1562-4-kmatsui@gcc.gnu.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20230901112510.1562-1-kmatsui@gcc.gnu.org> References: <20230715045519.50684-1-kmatsui@gcc.gnu.org> <20230901112510.1562-1-kmatsui@gcc.gnu.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Proofpoint-ORIG-GUID: eb-eDQeUTIxObZ6pWcTxf5zd5vKXZKNI X-Proofpoint-GUID: eb-eDQeUTIxObZ6pWcTxf5zd5vKXZKNI 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=2023-09-01_09,2023-08-31_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 spamscore=0 phishscore=0 lowpriorityscore=0 malwarescore=0 mlxscore=0 impostorscore=0 priorityscore=1501 bulkscore=0 clxscore=1034 mlxlogscore=645 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2308100000 definitions=main-2309010107 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 List-Id: This patch optimizes the performance of the is_compound trait by dispatching to the new __is_arithmetic built-in trait. libstdc++-v3/ChangeLog: * include/std/type_traits (is_compound): Do not use __not_. (is_compound_v): Use is_fundamental_v instead. Signed-off-by: Ken Matsui --- libstdc++-v3/include/std/type_traits | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/libstdc++-v3/include/std/type_traits b/libstdc++-v3/include/std/type_traits index cf24de2fcac..531f5a2bb3a 100644 --- a/libstdc++-v3/include/std/type_traits +++ b/libstdc++-v3/include/std/type_traits @@ -704,7 +704,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION /// is_compound template struct is_compound - : public __not_>::type { }; + : public __bool_constant::value> { }; /// @cond undocumented template @@ -3234,7 +3234,7 @@ template template inline constexpr bool is_scalar_v = is_scalar<_Tp>::value; template - inline constexpr bool is_compound_v = is_compound<_Tp>::value; + inline constexpr bool is_compound_v = !is_fundamental_v<_Tp>; template inline constexpr bool is_member_pointer_v = is_member_pointer<_Tp>::value; template -- 2.42.0