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Wed, 10 Jan 2024 19:41:13 +0000 Received: from smtp.washington.edu (smtp.washington.edu [128.208.60.54]) by mxout26.s.uw.edu (8.14.4+UW20.07/8.14.4+UW22.04) with ESMTP id 40AJehZG025278 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 10 Jan 2024 11:40:43 -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+UW19.10) with ESMTPSA id 40AJefnL020412 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 10 Jan 2024 11:40:43 -0800 X-UW-Orig-Sender: kmatsui@smtp.washington.edu From: Ken Matsui To: gcc-patches@gcc.gnu.org Cc: libstdc++@gcc.gnu.org, Ken Matsui Subject: [PATCH 12/14] libstdc++: Optimize std::is_signed compilation performance Date: Wed, 10 Jan 2024 01:23:03 -0800 Message-ID: <20240110194031.2384005-13-kmatsui@gcc.gnu.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240110194031.2384005-1-kmatsui@gcc.gnu.org> References: <20240110194031.2384005-1-kmatsui@gcc.gnu.org> MIME-Version: 1.0 X-Proofpoint-ORIG-GUID: ETIj7fLY23xsO344-O5CZ17fishpf3JP X-Proofpoint-GUID: ETIj7fLY23xsO344-O5CZ17fishpf3JP X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.997,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-01-10_10,2024-01-10_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 lowpriorityscore=0 clxscore=1034 spamscore=0 suspectscore=0 bulkscore=0 mlxlogscore=653 mlxscore=0 impostorscore=0 malwarescore=0 priorityscore=1501 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311290000 definitions=main-2401100156 X-Spam-Status: No, score=-11.8 required=5.0 tests=BAYES_00, DATE_IN_PAST_06_12, GIT_PATCH_0, JMQ_SPF_NEUTRAL, KAM_DMARC_STATUS, RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2, 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 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1787734181414324210 X-GMAIL-MSGID: 1787734181414324210 This patch optimizes the compilation performance of std::is_signed 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 --- 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 4bcfb1389e3..b917c743aea 100644 --- a/libstdc++-v3/include/std/type_traits +++ b/libstdc++-v3/include/std/type_traits @@ -968,6 +968,13 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION : public __bool_constant<__is_abstract(_Tp)> { }; + /// is_signed +#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_signed) + template + struct is_signed + : public __bool_constant<__is_signed(_Tp)> + { }; +#else /// @cond undocumented template::value> @@ -980,11 +987,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION { }; /// @endcond - /// is_signed template struct is_signed : public __is_signed_helper<_Tp>::type { }; +#endif /// is_unsigned #if _GLIBCXX_USE_BUILTIN_TRAIT(__is_unsigned) @@ -3418,8 +3425,13 @@ template template inline constexpr bool is_final_v = __is_final(_Tp); +#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_signed) +template + inline constexpr bool is_signed_v = __is_signed(_Tp); +#else template inline constexpr bool is_signed_v = is_signed<_Tp>::value; +#endif #if _GLIBCXX_USE_BUILTIN_TRAIT(__is_unsigned) template