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 1572C3853D3F; Tue, 18 Jul 2023 07:44:03 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 1572C3853D3F 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 (m0247471.ppops.net [127.0.0.1]) by mx0a-00641c01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 36I7eJKg013206; Tue, 18 Jul 2023 07:44:02 GMT Received: from mxout23.cac.washington.edu (mxout23.cac.washington.edu [140.142.32.140]) by mx0a-00641c01.pphosted.com (PPS) with ESMTPS id 3rwe06a0nf-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 18 Jul 2023 07:44:02 +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 36I7hrqK024830 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 18 Jul 2023 00:43:53 -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 36I7eSE1011317 (version=TLSv1.2 cipher=DHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT); Tue, 18 Jul 2023 00:43:53 -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 v4 4/4] libstdc++: Optimize is_compound trait performance Date: Tue, 18 Jul 2023 00:40:27 -0700 Message-ID: <20230718074027.32270-4-kmatsui@gcc.gnu.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230718074027.32270-1-kmatsui@gcc.gnu.org> References: <20230718062745.29470-1-kmatsui@gcc.gnu.org> <20230718074027.32270-1-kmatsui@gcc.gnu.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Proofpoint-ORIG-GUID: niuHjA4jir8diNM7P7Fswzt6Fs8yYxnQ X-Proofpoint-GUID: niuHjA4jir8diNM7P7Fswzt6Fs8yYxnQ X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.591,FMLib:17.11.176.26 definitions=2023-07-17_15,2023-07-13_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1034 priorityscore=1501 malwarescore=0 spamscore=0 adultscore=0 lowpriorityscore=0 mlxlogscore=482 suspectscore=0 mlxscore=0 impostorscore=0 phishscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2306200000 definitions=main-2307180069 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_H3,RCVD_IN_MSPIKE_WL,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 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): Use __is_arithmetic built-in trait. (is_compound_v): Use is_fundamental_v instead. Signed-off-by: Ken Matsui --- libstdc++-v3/include/std/type_traits | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/libstdc++-v3/include/std/type_traits b/libstdc++-v3/include/std/type_traits index cf24de2fcac..73d9a2b16fc 100644 --- a/libstdc++-v3/include/std/type_traits +++ b/libstdc++-v3/include/std/type_traits @@ -702,9 +702,18 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION { }; /// is_compound +#if __has_builtin(__is_arithmetic) + template + struct is_compound + : public __bool_constant::value + || is_null_pointer<_Tp>::value)> + { }; +#else template struct is_compound : public __not_>::type { }; +#endif /// @cond undocumented template @@ -3234,7 +3243,7 @@ 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 -- 2.41.0