Message ID | 20230915023640.75216-16-kmatsui@gcc.gnu.org |
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State | Unresolved |
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Fri, 15 Sep 2023 02:37:03 +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 38F2agBX009806 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 14 Sep 2023 19:36:43 -0700 X-Auth-Received: from localhost.localdomain ([10.154.75.179]) (authenticated authid=kmatsui) by smtp.washington.edu (8.16.1+UW21.10/8.14.4+UW19.10) with ESMTPSA id 38F2ago7001192 (version=TLSv1.2 cipher=DHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT); Thu, 14 Sep 2023 19:36:42 -0700 X-UW-Orig-Sender: kmatsui@smtp.washington.edu To: gcc-patches@gcc.gnu.org Cc: libstdc++@gcc.gnu.org, Ken Matsui <kmatsui@gcc.gnu.org> Subject: [PATCH v13 15/40] libstdc++: Optimize is_member_pointer trait performance Date: Thu, 14 Sep 2023 19:34:55 -0700 Message-ID: <20230915023640.75216-16-kmatsui@gcc.gnu.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20230915023640.75216-1-kmatsui@gcc.gnu.org> References: <20230915022305.74083-1-kmatsui@gcc.gnu.org> <20230915023640.75216-1-kmatsui@gcc.gnu.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Proofpoint-ORIG-GUID: ks8ebvvaR4W_GnrDUHHHX-zbR-UKV342 X-Proofpoint-GUID: ks8ebvvaR4W_GnrDUHHHX-zbR-UKV342 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.267,Aquarius:18.0.980,Hydra:6.0.601,FMLib:17.11.176.26 definitions=2023-09-15_02,2023-09-14_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 suspectscore=0 spamscore=0 bulkscore=0 lowpriorityscore=0 mlxlogscore=456 malwarescore=0 priorityscore=1501 mlxscore=0 phishscore=0 impostorscore=0 clxscore=1034 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2308100000 definitions=main-2309150022 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 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> From: Ken Matsui via Gcc-patches <gcc-patches@gcc.gnu.org> Reply-To: Ken Matsui <kmatsui@gcc.gnu.org> Errors-To: gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org Sender: "Gcc-patches" <gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org> X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1776996307296308519 X-GMAIL-MSGID: 1777073839029357870 |
Series |
Optimize type traits performance
|
|
Checks
Context | Check | Description |
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snail/gcc-patch-check | warning | Git am fail log |
Commit Message
Ken Matsui
Sept. 15, 2023, 2:34 a.m. UTC
This patch optimizes the performance of the is_member_pointer trait
by dispatching to the new __is_member_pointer built-in trait.
libstdc++-v3/ChangeLog:
* include/std/type_traits (is_member_pointer): Use __is_member_pointer
built-in trait.
(is_member_pointer_v): Likewise.
Signed-off-by: Ken Matsui <kmatsui@gcc.gnu.org>
---
libstdc++-v3/include/std/type_traits | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/libstdc++-v3/include/std/type_traits b/libstdc++-v3/include/std/type_traits index 7fd29d8d9f2..d7f89cf7c06 100644 --- a/libstdc++-v3/include/std/type_traits +++ b/libstdc++-v3/include/std/type_traits @@ -716,6 +716,13 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION struct is_compound : public __not_<is_fundamental<_Tp>>::type { }; + /// is_member_pointer +#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_member_pointer) + template<typename _Tp> + struct is_member_pointer + : public __bool_constant<__is_member_pointer(_Tp)> + { }; +#else /// @cond undocumented template<typename _Tp> struct __is_member_pointer_helper @@ -726,11 +733,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION : public true_type { }; /// @endcond - /// is_member_pointer template<typename _Tp> struct is_member_pointer : public __is_member_pointer_helper<__remove_cv_t<_Tp>>::type { }; +#endif template<typename, typename> struct is_same; @@ -3242,8 +3249,14 @@ template <typename _Tp> inline constexpr bool is_scalar_v = is_scalar<_Tp>::value; template <typename _Tp> inline constexpr bool is_compound_v = is_compound<_Tp>::value; + +#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_member_pointer) +template <typename _Tp> + inline constexpr bool is_member_pointer_v = __is_member_pointer(_Tp); +#else template <typename _Tp> inline constexpr bool is_member_pointer_v = is_member_pointer<_Tp>::value; +#endif #if _GLIBCXX_USE_BUILTIN_TRAIT(__is_const) template <typename _Tp>