Message ID | 20240219135129.3635809-18-kmatsui@gcc.gnu.org |
---|---|
State | Unresolved |
Headers |
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Mon, 19 Feb 2024 13:51:52 +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+UW24.02) with ESMTP id 41JDpaxE017817 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 19 Feb 2024 05:51:36 -0800 X-Auth-Received: from kmatsui-ThinkPad-X1-Carbon-Gen-9.dhcp4.washington.edu ([10.154.74.143]) (authenticated authid=kmatsui) by smtp.washington.edu (8.16.1+UW21.10/8.14.4+UW24.02) with ESMTPSA id 41JDpZRa001026 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 19 Feb 2024 05:51:36 -0800 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 v7 18/22] libstdc++: Optimize std::add_rvalue_reference compilation performance Date: Mon, 19 Feb 2024 05:51:25 -0800 Message-ID: <20240219135129.3635809-18-kmatsui@gcc.gnu.org> X-Mailer: git-send-email 2.43.2 In-Reply-To: <20240219135129.3635809-1-kmatsui@gcc.gnu.org> References: <20240106050754.3054782-1-kmatsui@gcc.gnu.org> <20240219135129.3635809-1-kmatsui@gcc.gnu.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Proofpoint-ORIG-GUID: 4RglBA7TftdyIW5nuzqUlbHstSzEIGMh X-Proofpoint-GUID: 4RglBA7TftdyIW5nuzqUlbHstSzEIGMh X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.1011,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-02-19_09,2024-02-19_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 adultscore=0 clxscore=1034 impostorscore=0 mlxscore=0 spamscore=0 malwarescore=0 mlxlogscore=737 priorityscore=1501 bulkscore=0 phishscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311290000 definitions=main-2402190103 X-Spam-Status: No, score=-13.3 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, T_SCC_BODY_TEXT_LINE 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+ouuuleilei=gmail.com@gcc.gnu.org X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1791336185814634233 X-GMAIL-MSGID: 1791336185814634233 |
Series |
[v7,01/22] c++: Implement __is_const built-in trait
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Checks
Context | Check | Description |
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snail/gcc-patch-check | warning | Git am fail log |
Commit Message
Ken Matsui
Feb. 19, 2024, 1:51 p.m. UTC
This patch optimizes the compilation performance of
std::add_rvalue_reference by dispatching to the new
__add_rvalue_reference built-in trait.
libstdc++-v3/ChangeLog:
* include/std/type_traits (add_rvalue_reference): Use
__add_rvalue_reference built-in trait.
(__add_rvalue_reference_helper): Likewise.
Signed-off-by: Ken Matsui <kmatsui@gcc.gnu.org>
---
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 17bf47d59d3..18a5e4de2d3 100644 --- a/libstdc++-v3/include/std/type_traits +++ b/libstdc++-v3/include/std/type_traits @@ -1185,6 +1185,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION }; /// @cond undocumented +#if _GLIBCXX_USE_BUILTIN_TRAIT(__add_rvalue_reference) + template<typename _Tp> + struct __add_rvalue_reference_helper + { using type = __add_rvalue_reference(_Tp); }; +#else template<typename _Tp, typename = void> struct __add_rvalue_reference_helper { using type = _Tp; }; @@ -1192,6 +1197,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION template<typename _Tp> struct __add_rvalue_reference_helper<_Tp, __void_t<_Tp&&>> { using type = _Tp&&; }; +#endif template<typename _Tp> using __add_rval_ref_t = typename __add_rvalue_reference_helper<_Tp>::type; @@ -1748,9 +1754,15 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION #endif /// add_rvalue_reference +#if _GLIBCXX_USE_BUILTIN_TRAIT(__add_rvalue_reference) + template<typename _Tp> + struct add_rvalue_reference + { using type = __add_rvalue_reference(_Tp); }; +#else template<typename _Tp> struct add_rvalue_reference { using type = __add_rval_ref_t<_Tp>; }; +#endif #if __cplusplus > 201103L /// Alias template for remove_reference