Message ID | 20230915235353.19378-39-kmatsui@gcc.gnu.org |
---|---|
State | Unresolved |
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Fri, 15 Sep 2023 23:54:19 +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 38FNruOd016474 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 15 Sep 2023 16:53:57 -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 38FNrt2f000587 (version=TLSv1.2 cipher=DHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT); Fri, 15 Sep 2023 16:53:56 -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 v14 38/40] libstdc++: Optimize is_signed trait performance Date: Fri, 15 Sep 2023 16:51:24 -0700 Message-ID: <20230915235353.19378-39-kmatsui@gcc.gnu.org> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20230915235353.19378-1-kmatsui@gcc.gnu.org> References: <20230915023640.75216-17-kmatsui@gcc.gnu.org> <20230915235353.19378-1-kmatsui@gcc.gnu.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Proofpoint-ORIG-GUID: 4bofXqDR9QDO9lAOWg_ioWlZAcXeNGxb X-Proofpoint-GUID: 4bofXqDR9QDO9lAOWg_ioWlZAcXeNGxb 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_20,2023-09-15_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 bulkscore=0 mlxlogscore=735 priorityscore=1501 suspectscore=0 spamscore=0 phishscore=0 clxscore=1034 impostorscore=0 mlxscore=0 adultscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2308100000 definitions=main-2309150213 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> 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: 1777151723642514194 X-GMAIL-MSGID: 1777151723642514194 |
Series |
Optimize type traits performance
|
|
Checks
Context | Check | Description |
---|---|---|
snail/gcc-patch-check | warning | Git am fail log |
Commit Message
Ken Matsui
Sept. 15, 2023, 11:51 p.m. UTC
This patch optimizes the performance of the is_signed trait by dispatching to
the new __is_signed built-in trait.
libstdc++-v3/ChangeLog:
* include/std/type_traits (is_signed): Use __is_signed built-in trait.
(is_signed_v): Likewise.
Signed-off-by: Ken Matsui <kmatsui@gcc.gnu.org>
---
libstdc++-v3/include/std/type_traits | 14 +++++++++++++-
1 file changed, 13 insertions(+), 1 deletion(-)
diff --git a/libstdc++-v3/include/std/type_traits b/libstdc++-v3/include/std/type_traits index f7d3815f332..7e93923f44b 100644 --- a/libstdc++-v3/include/std/type_traits +++ b/libstdc++-v3/include/std/type_traits @@ -982,6 +982,13 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION : public __bool_constant<__is_abstract(_Tp)> { }; + /// is_signed +#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_signed) + template<typename _Tp> + struct is_signed + : public __bool_constant<__is_signed(_Tp)> + { }; +#else /// @cond undocumented template<typename _Tp, bool = is_arithmetic<_Tp>::value> @@ -994,11 +1001,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION { }; /// @endcond - /// is_signed template<typename _Tp> struct is_signed : public __is_signed_helper<_Tp>::type { }; +#endif /// is_unsigned #if _GLIBCXX_USE_BUILTIN_TRAIT(__is_unsigned) @@ -3445,8 +3452,13 @@ template <typename _Tp> template <typename _Tp> inline constexpr bool is_final_v = __is_final(_Tp); +#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_signed) +template <typename _Tp> + inline constexpr bool is_signed_v = __is_signed(_Tp); +#else template <typename _Tp> inline constexpr bool is_signed_v = is_signed<_Tp>::value; +#endif #if _GLIBCXX_USE_BUILTIN_TRAIT(__is_unsigned) template <typename _Tp>