Message ID | 20231020135748.1846670-30-kmatsui@gcc.gnu.org |
---|---|
State | New |
Headers | show
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Fri, 20 Oct 2023 14:12:54 GMT Received: from mxout22.s.uw.edu (mxout22.s.uw.edu [128.95.242.222]) by mx0a-00641c01.pphosted.com (PPS) with ESMTPS id 3tuc8gmsg6-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 20 Oct 2023 14:12:54 +0000 Received: from smtp.washington.edu (smtp.washington.edu [128.208.60.54]) by mxout22.s.uw.edu (8.14.4+UW20.07/8.14.4+UW22.04) with ESMTP id 39KE8AxE017243 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 20 Oct 2023 07:08:10 -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 39KDvqKh011267 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 20 Oct 2023 07:08:10 -0700 X-UW-Orig-Sender: kmatsui@smtp.washington.edu From: Ken Matsui <kmatsui@gcc.gnu.org> To: gcc-patches@gcc.gnu.org Cc: libstdc++@gcc.gnu.org, Ken Matsui <kmatsui@gcc.gnu.org> Subject: [PATCH v23 29/33] libstdc++: Optimize std::remove_pointer compilation performance Date: Fri, 20 Oct 2023 06:53:48 -0700 Message-ID: <20231020135748.1846670-30-kmatsui@gcc.gnu.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231020135748.1846670-1-kmatsui@gcc.gnu.org> References: <20231017113822.677344-1-kmatsui@gcc.gnu.org> <20231020135748.1846670-1-kmatsui@gcc.gnu.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Proofpoint-GUID: te2O_5PkgejgRjivEV5WtUKnJweDZ3DB X-Proofpoint-ORIG-GUID: te2O_5PkgejgRjivEV5WtUKnJweDZ3DB 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=2023-10-20_10,2023-10-19_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=594 mlxscore=0 priorityscore=1501 malwarescore=0 bulkscore=0 impostorscore=0 suspectscore=0 phishscore=0 clxscore=1034 lowpriorityscore=0 adultscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2310170001 definitions=main-2310200116 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 <gcc-patches.gcc.gnu.org> List-Unsubscribe: <https://gcc.gnu.org/mailman/options/gcc-patches>, <mailto:gcc-patches-request@gcc.gnu.org?subject=unsubscribe> List-Archive: <https://gcc.gnu.org/pipermail/gcc-patches/> List-Post: <mailto:gcc-patches@gcc.gnu.org> List-Help: <mailto:gcc-patches-request@gcc.gnu.org?subject=help> List-Subscribe: <https://gcc.gnu.org/mailman/listinfo/gcc-patches>, <mailto:gcc-patches-request@gcc.gnu.org?subject=subscribe> Errors-To: gcc-patches-bounces+incoming=patchwork.ozlabs.org@gcc.gnu.org |
Series |
Optimize type traits performance
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expand
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diff --git a/libstdc++-v3/include/std/type_traits b/libstdc++-v3/include/std/type_traits index 80ec0fd5475..0641ecfdf2b 100644 --- a/libstdc++-v3/include/std/type_traits +++ b/libstdc++-v3/include/std/type_traits @@ -2103,6 +2103,12 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION // Pointer modifications. + /// remove_pointer +#if _GLIBCXX_USE_BUILTIN_TRAIT(__remove_pointer) + template<typename _Tp> + struct remove_pointer + { using type = __remove_pointer(_Tp); }; +#else template<typename _Tp, typename> struct __remove_pointer_helper { using type = _Tp; }; @@ -2111,11 +2117,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION struct __remove_pointer_helper<_Tp, _Up*> { using type = _Up; }; - /// remove_pointer template<typename _Tp> struct remove_pointer : public __remove_pointer_helper<_Tp, __remove_cv_t<_Tp>> { }; +#endif template<typename _Tp, typename = void> struct __add_pointer_helper
This patch optimizes the compilation performance of std::remove_pointer by dispatching to the new remove_pointer built-in trait. libstdc++-v3/ChangeLog: * include/std/type_traits (remove_pointer): Use __remove_pointer built-in trait. Signed-off-by: Ken Matsui <kmatsui@gcc.gnu.org> --- libstdc++-v3/include/std/type_traits | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)