Message ID | 20230915022305.74083-10-kmatsui@gcc.gnu.org |
---|---|
State | Accepted |
Headers |
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Fri, 15 Sep 2023 02:23:34 +0000 Received: from smtp.washington.edu (smtp.washington.edu [140.142.234.157]) by mxout21.s.uw.edu (8.14.4+UW20.07/8.14.4+UW22.04) with ESMTP id 38F2N7k9032705 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 14 Sep 2023 19:23:07 -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 38F2N6J2031819 (version=TLSv1.2 cipher=DHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT); Thu, 14 Sep 2023 19:23:07 -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 v12 09/40] libstdc++: Optimize is_unbounded_array trait performance Date: Thu, 14 Sep 2023 19:21:15 -0700 Message-ID: <20230915022305.74083-10-kmatsui@gcc.gnu.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20230915022305.74083-1-kmatsui@gcc.gnu.org> References: <20230914064949.29787-1-kmatsui@gcc.gnu.org> <20230915022305.74083-1-kmatsui@gcc.gnu.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Proofpoint-ORIG-GUID: pn-vEi3yyE-DIzprUJP09U6T_uIiyCQz X-Proofpoint-GUID: pn-vEi3yyE-DIzprUJP09U6T_uIiyCQz 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=625 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-2309150019 X-Spam-Status: No, score=-13.5 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: 1776996817880022434 X-GMAIL-MSGID: 1777071093752763704 |
Series |
Optimize type traits performance
|
|
Checks
Context | Check | Description |
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snail/gcc-patch-check | success | Github commit url |
Commit Message
Ken Matsui
Sept. 15, 2023, 2:21 a.m. UTC
This patch optimizes the performance of the is_unbounded_array trait by
dispatching to the new __is_unbounded_array built-in trait.
libstdc++-v3/ChangeLog:
* include/std/type_traits (is_unbounded_array_v): Use
__is_unbounded_array built-in trait.
Signed-off-by: Ken Matsui <kmatsui@gcc.gnu.org>
---
libstdc++-v3/include/std/type_traits | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/libstdc++-v3/include/std/type_traits b/libstdc++-v3/include/std/type_traits index 4e8165e5af5..cb3d9e238fa 100644 --- a/libstdc++-v3/include/std/type_traits +++ b/libstdc++-v3/include/std/type_traits @@ -3541,11 +3541,16 @@ template<typename _Ret, typename _Fn, typename... _Args> /// True for a type that is an array of unknown bound. /// @ingroup variable_templates /// @since C++20 +# if _GLIBCXX_USE_BUILTIN_TRAIT(__is_unbounded_array) + template<typename _Tp> + inline constexpr bool is_unbounded_array_v = __is_unbounded_array(_Tp); +# else template<typename _Tp> inline constexpr bool is_unbounded_array_v = false; template<typename _Tp> inline constexpr bool is_unbounded_array_v<_Tp[]> = true; +# endif /// True for a type that is an array of known bound. /// @since C++20