From patchwork Tue Oct 24 02:00:48 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ken Matsui X-Patchwork-Id: 157196 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:ce89:0:b0:403:3b70:6f57 with SMTP id p9csp1667791vqx; Mon, 23 Oct 2023 19:06:33 -0700 (PDT) X-Google-Smtp-Source: AGHT+IEjHTzSl/++HoUIESPNUrn29qVY4pNGX+X8quf2VJBpv+V3FNi3C8UH2KI+aq1jI+cVmVh8 X-Received: by 2002:a05:6214:1925:b0:66d:9987:68f9 with SMTP id es5-20020a056214192500b0066d998768f9mr11328597qvb.15.1698113192999; Mon, 23 Oct 2023 19:06:32 -0700 (PDT) ARC-Seal: i=2; a=rsa-sha256; t=1698113192; cv=pass; d=google.com; s=arc-20160816; b=eJFmm8/OAzhS/plJ6LpJ+j2UfdERXHttSR5hO19KtYdr5kflD6PDAchYedkVmONSQ5 jxhTreZIrQceZqeV0T3mBvsXFSkFuVGCafDjl5pKwboBtMYnMOUVjNKmq+jbKhiPiQHT sbi1MGRgOYNHFlREi0fCQKHp1UySe4ETHo0IlPJrlfUl2yHnsvQXXmpZi3AxfwHzYwt1 NxNzl4116LSte74DXZpFiYCQbiHO7VZN1NpttF86SWKMdnLhaMMsF+TqaDKRgQy+lXM8 CwkgBKQWqehLIkC7/+iIBK3YoiQ1pLyy8Urrz32iZnp6793Koypl/yiMveG6K/05T0ML +l5g== 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=MQJ2IHEDHzYbHc5b9ntF5AYsbzO15tynS6bgXJYS+10=; fh=kSSy/oyUXqQD15FLeKdymIgDBFPFITPA1Gj52CNOxRQ=; b=f08HhEbGFYVpiP/E6jRmmxYtYI5Xj6INy5tWmZgxmlybTgqJBB7unmDdkiSoO+MhyU eV6uMlXbqjhWC3V1GMMAR1/ZZvmfnkbZ/WgV19FBO52LT1DBbpDHxQYV0OerDEgHV72M pcIGh1608rQT8vLWfDmeXytSFumXZGpkRBxcx1OAyxw+RUyo3VPltDkNonaKf6waTbdP tQCUknpjty0Zfvz6b4Z55dqgFWubcFydEZ6+9Iox5FkktOfCr2UUkB6hf/406xwqWTsE uzR/gh8BwBlWX1Bv+28YAuXK0RE7zYYlpRW9bbEWCEk8TSRejI51DlH1a/vSKGQ2LePX xMbg== ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@gcc.gnu.org header.s=default header.b=eDGRYqX4; 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 (server2.sourceware.org. [8.43.85.97]) by mx.google.com with ESMTPS id vq25-20020a05620a559900b0077771d8a8f2si6632978qkn.570.2023.10.23.19.06.32 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 23 Oct 2023 19:06:32 -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=eDGRYqX4; 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 4A0FD385DC17 for ; Tue, 24 Oct 2023 02:06:31 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 4A0FD385DC17 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1698113191; bh=MQJ2IHEDHzYbHc5b9ntF5AYsbzO15tynS6bgXJYS+10=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=eDGRYqX4R7hteNXJjlI6QEyTLa7ZCf5+hmD1t80+8Jv+/EHjbTLIqPJpvXh2XLha7 icm1hSmvQgug3sseb9NaP7gNz/x6Ea3z31x534OPzz3fWO3xNOmVkBDGpEqbe7DdWe sbCuYjWEzs4PROfijpzN3wrRxSSj0qmRMWVOKCdc= 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 662743858CDA; Tue, 24 Oct 2023 02:04:37 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 662743858CDA 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 662743858CDA 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=1698113078; cv=none; b=OA+jkyQNvQc0TYBznu1M6bKzbbvaLmItI1uO9thSafK8vUWDPGVhdO4zrUkjLrL19NK/XqOrp5rDUjwsokuOdxGiQu0r3s4867a7EWW0gs+CvixytAkjt8HrEgltuAcd4POJCInrX0nsC9yUcsBtLp60M+xB1KCAC/bIZhIHkKE= ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1698113078; c=relaxed/simple; bh=VEb7z3sxObsB1GIYka55Rude4uxGPZskbZ+kWa+UTWU=; h=From:To:Subject:Date:Message-ID:MIME-Version; b=rf4VpqtEbpd3zatSWQQAzgqeSJfbkMOg7TsSLtLx2bmScJeVhecu0BpGHkv/rH/xYWul/PcDDPXdX84Ht1GaNYdL5yiaBypmvyVtzTUtbB73UrMZ9iIRDqTO4VOXv9b58bAwDcsO1ikD5sBMUeEO/CisjEgBgGXBdsSDzfzSZ64= ARC-Authentication-Results: i=1; server2.sourceware.org Received: from pps.filterd (m0247480.ppops.net [127.0.0.1]) by mx0a-00641c01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 39O1uf5D000722; Tue, 24 Oct 2023 02:04:36 GMT Received: from mxout26.s.uw.edu (mxout26.s.uw.edu [140.142.234.176]) by mx0a-00641c01.pphosted.com (PPS) with ESMTPS id 3tx07j25ya-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 24 Oct 2023 02:04:36 +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 39O24YQR006160 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 23 Oct 2023 19:04:35 -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 39O24Tm3031305 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 23 Oct 2023 19:04:34 -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 v25 05/33] libstdc++: Optimize std::is_const compilation performance Date: Mon, 23 Oct 2023 19:00:48 -0700 Message-ID: <20231024020424.699427-6-kmatsui@gcc.gnu.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231024020424.699427-1-kmatsui@gcc.gnu.org> References: <20231020162115.2307797-1-kmatsui@gcc.gnu.org> <20231024020424.699427-1-kmatsui@gcc.gnu.org> MIME-Version: 1.0 X-Proofpoint-GUID: tb4ogo9IZJpzI2s5rfgzRDdD9mi47JZO X-Proofpoint-ORIG-GUID: tb4ogo9IZJpzI2s5rfgzRDdD9mi47JZO 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=2023-10-24_01,2023-10-19_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1034 bulkscore=0 malwarescore=0 adultscore=0 mlxscore=0 priorityscore=1501 suspectscore=0 mlxlogscore=766 phishscore=0 spamscore=0 lowpriorityscore=0 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2310170001 definitions=main-2310240017 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: 1780600739735263030 X-GMAIL-MSGID: 1780600739735263030 This patch optimizes the compilation performance of std::is_const by dispatching to the new __is_const built-in trait. libstdc++-v3/ChangeLog: * include/std/type_traits (is_const): Use __is_const built-in trait. (is_const_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 677cd934b94..686e38e47c3 100644 --- a/libstdc++-v3/include/std/type_traits +++ b/libstdc++-v3/include/std/type_traits @@ -784,6 +784,12 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION // Type properties. /// is_const +#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_const) + template + struct is_const + : public __bool_constant<__is_const(_Tp)> + { }; +#else template struct is_const : public false_type { }; @@ -791,6 +797,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION template struct is_const<_Tp const> : public true_type { }; +#endif /// is_volatile template @@ -3218,10 +3225,17 @@ template inline constexpr bool is_compound_v = is_compound<_Tp>::value; template inline constexpr bool is_member_pointer_v = is_member_pointer<_Tp>::value; + +#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_const) +template + inline constexpr bool is_const_v = __is_const(_Tp); +#else template inline constexpr bool is_const_v = false; template inline constexpr bool is_const_v = true; +#endif + template inline constexpr bool is_volatile_v = false; template