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Tue, 24 Oct 2023 02:05:09 +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 39O24bjM006168 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 23 Oct 2023 19:04:37 -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 39O24Tm7031305 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 23 Oct 2023 19:04:37 -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 09/33] libstdc++: Optimize std::is_array compilation performance Date: Mon, 23 Oct 2023 19:00:52 -0700 Message-ID: <20231024020424.699427-10-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: IJxKztzTp5YB6fSRHnmzuLdYf1Lsi-_P X-Proofpoint-ORIG-GUID: IJxKztzTp5YB6fSRHnmzuLdYf1Lsi-_P 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 mlxlogscore=527 adultscore=0 suspectscore=0 mlxscore=0 phishscore=0 spamscore=0 lowpriorityscore=0 impostorscore=0 clxscore=1034 bulkscore=0 priorityscore=1501 malwarescore=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: 1780601102679743632 X-GMAIL-MSGID: 1780601102679743632 This patch optimizes the compilation performance of std::is_array 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;