From patchwork Tue Oct 17 11:27:53 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ken Matsui X-Patchwork-Id: 154138 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a05:612c:2908:b0:403:3b70:6f57 with SMTP id ib8csp4075559vqb; Tue, 17 Oct 2023 04:52:27 -0700 (PDT) X-Google-Smtp-Source: AGHT+IGpR9bFCVURxK7N9gpMw25GYXTm7SHvLRG5kYXaTdF12ciN8M+oTgJUizg1TQpeRi22XVqD X-Received: by 2002:a05:6102:2006:b0:452:85eb:e36d with SMTP id p6-20020a056102200600b0045285ebe36dmr2071316vsr.20.1697543547480; Tue, 17 Oct 2023 04:52:27 -0700 (PDT) ARC-Seal: i=2; a=rsa-sha256; t=1697543547; cv=pass; d=google.com; s=arc-20160816; b=UT2uzRRuDKpm07hg+1tvR+87RaTne7ejjZEVsSi2BvA8uLX4BnmnGcx4H1pzHExvSD jUPhwgvG3uo8wmzH6+z2eMpG+BbL+26cc+cTxE4xxQmOq7uY0mAvQ+QgyRfZnqZUWPou Px5k8NZoLt7kBWlwmcJDSx/v/zNY0wiBkBiPgzOxQBIrRH159+rY8fbefCenVZz1tp2T YAfsjJOx6IgUw8843lkPymvY/uxJCE62QB1Ur4XTEnCccRl7ZTAlTbDoDQGKfjcBi1wK 1c9BKWDpojf9UCm4mj+xyiPMAujo4IiJlxICNN8q6pg9qhPxjJlFloG9bcWUeUELJUsg efmA== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=errors-to:list-subscribe:list-help:list-post:list-archive :list-unsubscribe:list-id:precedence:content-transfer-encoding :mime-version:references:in-reply-to:message-id:date:subject:cc:to :from:arc-filter:dmarc-filter:delivered-to:dkim-signature :dkim-filter; bh=rD9Ixo1azXYHHHB/BRXQ4O0ZhyFrXng+m93wtWrxPGk=; fh=kSSy/oyUXqQD15FLeKdymIgDBFPFITPA1Gj52CNOxRQ=; b=ED1sT+td962AjFTrnu0cewMuGjBlynwCwJet8hVXp6J+akHg5FJ0DzMEPRuS+Azam3 0MhJbEGPJeBRz5aD3CPZqu+ZCUj0f/0+lMBURE3kWhU0tgQuwaEr+j/RmEkE9Z3TJFPg qeWlANgs2wVNLtMIaQfbUWeSyiM6U7d1YZxyAa2TYfwgRVmdvnq8CtJbEeEAcIHs9TdX 4j8A/xm/h+JENL4ypxMZll3X35oj00+CsdP3fnozyFjFAhDZSy2A7RfenlqgEFWdZHpS zPy1LNmZFZOJByEzWpZmC9UYDQdlsDi9xXY6mpoE0Ocyc2c1z0OX4iPO9iFEsjBiUk/X sfZg== ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@gcc.gnu.org header.s=default header.b=gsW7rJnR; arc=pass (i=1); 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 (ip-8-43-85-97.sourceware.org. [8.43.85.97]) by mx.google.com with ESMTPS id d8-20020ac85ac8000000b004198562004csi992757qtd.521.2023.10.17.04.52.27 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 17 Oct 2023 04:52:27 -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=gsW7rJnR; arc=pass (i=1); 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 7B3EB396D825 for ; Tue, 17 Oct 2023 11:50:48 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 7B3EB396D825 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1697543448; bh=rD9Ixo1azXYHHHB/BRXQ4O0ZhyFrXng+m93wtWrxPGk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=gsW7rJnRln1KBrM6/M75lg355tv7ShO0f+JRK5WuLjfI+qAipTq0m+G377hMv3xRf jsEe8kcV1VHwbIS3ves6jt2YP+Shb8TZW+aGVeA685+P18nwEPaHviPsQSLxtViULE 4jICIgjHtlJCkxHGlDt3B2osV9oxI2Yp4xIxY0XY= X-Original-To: gcc-patches@gcc.gnu.org Delivered-To: gcc-patches@gcc.gnu.org Received: from mx0b-00641c01.pphosted.com (mx0b-00641c01.pphosted.com [205.220.177.146]) by sourceware.org (Postfix) with ESMTPS id 5CD98385624F; Tue, 17 Oct 2023 11:36:03 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 5CD98385624F 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 5CD98385624F 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=1697542568; cv=none; b=lvbZPlWoyFu0XBkciq1byST/ntPsJgnK9FIoyCGR0TU9DAxghGP3wK/NEpV5whlYGC82rDbMFlR+oJSPRztQiUxoCZl9N6cxgdG88cOn5SvjqgBQFrbuds5/7FuVeI3NgsyeU+xG6+OaFEB83z7oXbE94LFGnUqpykOegD7seJA= ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1697542568; c=relaxed/simple; bh=XDazgY1fylMM2iWndx0Ss7j6lazHiqJTozl1aJbBepM=; h=From:To:Subject:Date:Message-ID:MIME-Version; b=fcItpLJuyzGs52+SwjL484wLi/zdG04zTS2MS/ElBD4xk5alqLEgdyCEgeoUZ6dq06y35Oj2CGqmwle4zxQV/lOZOnL0of36OVbkCkCyjT7pOH04hbqL15Xw/Ho9+av3gCTPFTLnsB7xox6rLYHpbm4EENrCIxewJswKwfoTmS4= ARC-Authentication-Results: i=1; server2.sourceware.org Received: from pps.filterd (m0247479.ppops.net [127.0.0.1]) by mx0a-00641c01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 39HBK2Bf026445; Tue, 17 Oct 2023 11:36:03 GMT Received: from mxout26.s.uw.edu (mxout26.s.uw.edu [140.142.234.176]) by mx0a-00641c01.pphosted.com (PPS) with ESMTPS id 3tsf40afvg-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 17 Oct 2023 11:36:02 +0000 Received: from smtp.washington.edu (smtp.washington.edu [140.142.234.157]) by mxout26.s.uw.edu (8.14.4+UW20.07/8.14.4+UW22.04) with ESMTP id 39HBZkkA012238 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 17 Oct 2023 04:35:46 -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 39HBWiMZ001840 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 17 Oct 2023 04:35:46 -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 v21 22/30] libstdc++: Optimize std::is_reference compilation performance Date: Tue, 17 Oct 2023 04:27:53 -0700 Message-ID: <20231017113242.664523-23-kmatsui@gcc.gnu.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231017113242.664523-1-kmatsui@gcc.gnu.org> References: <20231016001227.2717180-1-kmatsui@gcc.gnu.org> <20231017113242.664523-1-kmatsui@gcc.gnu.org> MIME-Version: 1.0 X-Proofpoint-GUID: ejgq3rwyEVLB6f5FsKsuuFsHPMOGBFGy X-Proofpoint-ORIG-GUID: ejgq3rwyEVLB6f5FsKsuuFsHPMOGBFGy 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 impostorscore=0 mlxscore=0 spamscore=0 phishscore=0 mlxlogscore=711 malwarescore=0 bulkscore=0 clxscore=1034 adultscore=0 suspectscore=0 lowpriorityscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2309180000 definitions=main-2310170097 X-Spam-Status: No, score=-13.2 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 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: , Errors-To: gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1780003423168701575 X-GMAIL-MSGID: 1780003423168701575 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