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 891513888C42; Tue, 17 Oct 2023 11:44:03 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 891513888C42 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 ARC-Filter: OpenARC Filter v1.0.0 sourceware.org 891513888C42 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=1697543047; cv=none; b=fyN1HrMgbxyg2conW6LeqJHwVQp5sXrk5fWFjPEIxPuxC9esNAzfALdhRLijDDXVPd8ixXDYaza+zWNAg1QEQfHM+o8Kha181H/JFJ6g1oKdcViPC0b2DoM6VtENwFmnCvogufAJcEy+R6B5bYy01GcKR5aTYtK03uZeP6+URSw= ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1697543047; c=relaxed/simple; bh=XDazgY1fylMM2iWndx0Ss7j6lazHiqJTozl1aJbBepM=; h=From:To:Subject:Date:Message-ID:MIME-Version; b=wLhjtpz6kHC9Qn40BR2CGJ7QtSB9vRmX8cSnngCUB35AcNFtw62zUd8jdCkvb7OBlZtCv9e3LN1T5GLtLSMoAN4Vg46t7B1G6Kxd7E6SDAUEoZBetp85VOCAgm1kq41ocEbJh16X0luKnyAmkjKPxDZbI+MUtjUkieJV6cg+c+w= ARC-Authentication-Results: i=1; server2.sourceware.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 39HBV4qM013067; Tue, 17 Oct 2023 11:44:02 GMT Received: from mxout24.cac.washington.edu (mxout24.cac.washington.edu [140.142.234.158]) by mx0a-00641c01.pphosted.com (PPS) with ESMTPS id 3tsf8x2ffk-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 17 Oct 2023 11:44:01 +0000 Received: from smtp.washington.edu (smtp.washington.edu [128.208.60.132]) by mxout24.cac.washington.edu (8.14.4+UW20.07/8.14.4+UW22.04) with ESMTP id 39HBhjln029932 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 17 Oct 2023 04:43:45 -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 39HBchGQ020891 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 17 Oct 2023 04:43:45 -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 v22 23/31] libstdc++: Optimize std::is_reference compilation performance Date: Tue, 17 Oct 2023 04:36:44 -0700 Message-ID: <20231017113822.677344-24-kmatsui@gcc.gnu.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231017113822.677344-1-kmatsui@gcc.gnu.org> References: <20231017113242.664523-1-kmatsui@gcc.gnu.org> <20231017113822.677344-1-kmatsui@gcc.gnu.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Proofpoint-GUID: wEQQ6t9lUFA838Wp5caseHW4nyKN5pzj X-Proofpoint-ORIG-GUID: wEQQ6t9lUFA838Wp5caseHW4nyKN5pzj 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=2023-10-16_13,2023-10-17_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 suspectscore=0 mlxlogscore=590 malwarescore=0 bulkscore=0 impostorscore=0 spamscore=0 clxscore=1034 mlxscore=0 adultscore=0 phishscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2309180000 definitions=main-2310170098 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 compilation performance of std::is_reference by dispatching to the new __is_reference built-in trait. libstdc++-v3/ChangeLog: * include/std/type_traits (is_reference): Use __is_reference built-in trait. (is_reference_v): Likewise. Signed-off-by: Ken Matsui --- libstdc++-v3/include/std/type_traits | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/libstdc++-v3/include/std/type_traits b/libstdc++-v3/include/std/type_traits index 792213ebfe8..36ad9814047 100644 --- a/libstdc++-v3/include/std/type_traits +++ b/libstdc++-v3/include/std/type_traits @@ -682,6 +682,12 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION // Composite type categories. /// is_reference +#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_reference) + template + struct is_reference + : public __bool_constant<__is_reference(_Tp)> + { }; +#else template struct is_reference : public false_type @@ -696,6 +702,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION struct is_reference<_Tp&&> : public true_type { }; +#endif /// is_arithmetic template @@ -3264,12 +3271,19 @@ template inline constexpr bool is_class_v = __is_class(_Tp); template inline constexpr bool is_function_v = is_function<_Tp>::value; + +#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_reference) +template + inline constexpr bool is_reference_v = __is_reference(_Tp); +#else template inline constexpr bool is_reference_v = false; template inline constexpr bool is_reference_v<_Tp&> = true; template inline constexpr bool is_reference_v<_Tp&&> = true; +#endif + template inline constexpr bool is_arithmetic_v = is_arithmetic<_Tp>::value; template -- 2.42.0