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 36B87385B522; Fri, 13 Oct 2023 22:43:18 +0000 (GMT) ARC-Filter: OpenARC Filter v1.0.0 sourceware.org 36B87385B522 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=1697237013; cv=none; b=ASifs7kN8Ag4DjMUhEbDs4FYr5JzCXMGv1PWMVr94NTulsKAL6IBg04gjQLTP5NIcUH6vspeANAgm40f8GxTK9HJBNlWRDqcY0/0qPfmGaHJqXJ9AwEdcd39jBo5tYmohXCnj1HID5EHyv7Jwq6WBwEqL2kv02e026j5gvlSbhs= ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1697237013; c=relaxed/simple; bh=MOf+TxQspyRPPZlZdf9KhTx3QdQB9mHppfT5BFfsWxE=; h=From:To:Subject:Date:Message-ID:MIME-Version; b=ZUFH5WxtovsvN+QgIzXmY3RZA3p+HHaNZNcpsZC3Don5yKU+EqZ2HTyhR3vZ5Cl70cfmsngHLOc0fEYWTbh+YDdneH9L2Z66DjXbJQPiBjqjLko/UVyHi/qVbqglahqJyV+NVi+hikCKvF3BwjOsvbyCz/1tHReG+fHNpLpaw7k= ARC-Authentication-Results: i=1; server2.sourceware.org DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 36B87385B522 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 (m0247474.ppops.net [127.0.0.1]) by mx0a-00641c01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 39DMgPUZ001997; Fri, 13 Oct 2023 22:43:17 GMT Received: from mxout24.cac.washington.edu (mxout24.cac.washington.edu [140.142.234.158]) by mx0a-00641c01.pphosted.com (PPS) with ESMTPS id 3tq3k05vfh-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 13 Oct 2023 22:43:16 +0000 Received: from smtp.washington.edu (smtp.washington.edu [128.208.60.54]) by mxout24.cac.washington.edu (8.14.4+UW20.07/8.14.4+UW22.04) with ESMTP id 39DMh15c001583 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 13 Oct 2023 15:43:01 -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 39DMdx1M016619 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 13 Oct 2023 15:43:01 -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 v19 09/40] libstdc++: Optimize is_array trait performance Date: Fri, 13 Oct 2023 15:37:23 -0700 Message-ID: <20231013223957.1634024-10-kmatsui@gcc.gnu.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231013223957.1634024-1-kmatsui@gcc.gnu.org> References: <20231013211206.1215663-1-kmatsui@gcc.gnu.org> <20231013223957.1634024-1-kmatsui@gcc.gnu.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Proofpoint-GUID: FVhzGe5XbcYQAy0URv_ztA-23L698MJd X-Proofpoint-ORIG-GUID: FVhzGe5XbcYQAy0URv_ztA-23L698MJd 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=2023-10-13_12,2023-10-12_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 priorityscore=1501 adultscore=0 clxscore=1034 mlxscore=0 lowpriorityscore=0 phishscore=0 spamscore=0 malwarescore=0 suspectscore=0 mlxlogscore=477 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2309180000 definitions=main-2310130198 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_array trait by dispatching to the new __is_array built-in trait. libstdc++-v3/ChangeLog: * include/std/type_traits (is_array): Use __is_array built-in trait. (is_array_v): Likewise. Signed-off-by: Ken Matsui --- libstdc++-v3/include/std/type_traits | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/libstdc++-v3/include/std/type_traits b/libstdc++-v3/include/std/type_traits index c01f65df22b..4e8165e5af5 100644 --- a/libstdc++-v3/include/std/type_traits +++ b/libstdc++-v3/include/std/type_traits @@ -523,6 +523,12 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION { }; /// is_array +#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_array) + template + struct is_array + : public __bool_constant<__is_array(_Tp)> + { }; +#else template struct is_array : public false_type { }; @@ -534,6 +540,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION template struct is_array<_Tp[]> : public true_type { }; +#endif template struct __is_pointer_helper @@ -3183,12 +3190,17 @@ template template inline constexpr bool is_floating_point_v = is_floating_point<_Tp>::value; +#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_array) +template + inline constexpr bool is_array_v = __is_array(_Tp); +#else template inline constexpr bool is_array_v = false; template inline constexpr bool is_array_v<_Tp[]> = true; template inline constexpr bool is_array_v<_Tp[_Num]> = true; +#endif template inline constexpr bool is_pointer_v = is_pointer<_Tp>::value; -- 2.42.0