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Tue, 17 Oct 2023 11:36:02 +0000 Received: from smtp.washington.edu (smtp.washington.edu [140.142.234.157]) by mxout22.s.uw.edu (8.14.4+UW20.07/8.14.4+UW22.04) with ESMTP id 39HBZjDu029032 (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 39HBWiMR001840 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 17 Oct 2023 04:35:45 -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 v21 14/30] libstdc++: Optimize std::is_scoped_enum compilation performance Date: Tue, 17 Oct 2023 04:27:45 -0700 Message-ID: <20231017113242.664523-15-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: OPwbnMkAfO0Fq9qSoAu_53gSLRyuEMwi X-Proofpoint-ORIG-GUID: OPwbnMkAfO0Fq9qSoAu_53gSLRyuEMwi 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 suspectscore=0 spamscore=0 phishscore=0 priorityscore=1501 lowpriorityscore=0 bulkscore=0 adultscore=0 mlxlogscore=818 malwarescore=0 clxscore=1034 mlxscore=0 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2309180000 definitions=main-2310170097 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, 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: 1780003114363271989 X-GMAIL-MSGID: 1780003114363271989 This patch optimizes the compilation performance of std::is_scoped_enum by dispatching to the new __is_scoped_enum built-in trait. libstdc++-v3/ChangeLog: * include/std/type_traits (is_scoped_enum): Use __is_scoped_enum built-in trait. (is_scoped_enum_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 d306073a797..7fd29d8d9f2 100644 --- a/libstdc++-v3/include/std/type_traits +++ b/libstdc++-v3/include/std/type_traits @@ -3633,6 +3633,12 @@ template /// True if the type is a scoped enumeration type. /// @since C++23 +# if _GLIBCXX_USE_BUILTIN_TRAIT(__is_scoped_enum) + template + struct is_scoped_enum + : bool_constant<__is_scoped_enum(_Tp)> + { }; +# else template struct is_scoped_enum : false_type @@ -3644,11 +3650,17 @@ template struct is_scoped_enum<_Tp> : bool_constant { }; +# endif /// @ingroup variable_templates /// @since C++23 +# if _GLIBCXX_USE_BUILTIN_TRAIT(__is_scoped_enum) + template + inline constexpr bool is_scoped_enum_v = __is_scoped_enum(_Tp); +# else template inline constexpr bool is_scoped_enum_v = is_scoped_enum<_Tp>::value; +# endif #endif #ifdef __cpp_lib_reference_from_temporary // C++ >= 23 && ref_{converts,constructs}_from_temp