public inbox for libstdc++-cvs@sourceware.org help / color / mirror / Atom feed
From: Ken Matsui <kmatsui@gcc.gnu.org> To: gcc-cvs@gcc.gnu.org, libstdc++-cvs@gcc.gnu.org Subject: [gcc r14-6628] libstdc++: Optimize std::is_member_object_pointer compilation performance Date: Sat, 16 Dec 2023 17:00:34 +0000 (GMT) [thread overview] Message-ID: <20231216170034.D91BE384770D@sourceware.org> (raw) https://gcc.gnu.org/g:fa454b8dd0346a1821338e2cfcf27c9cff0f1b5c commit r14-6628-gfa454b8dd0346a1821338e2cfcf27c9cff0f1b5c Author: Ken Matsui <kmatsui@gcc.gnu.org> Date: Tue Sep 12 00:14:06 2023 -0700 libstdc++: Optimize std::is_member_object_pointer compilation performance This patch optimizes the compilation performance of std::is_member_object_pointer by dispatching to the new __is_member_object_pointer built-in trait. libstdc++-v3/ChangeLog: * include/std/type_traits (is_member_object_pointer): Use __is_member_object_pointer built-in trait. (is_member_object_pointer_v): Likewise. Signed-off-by: Ken Matsui <kmatsui@gcc.gnu.org> Reviewed-by: Jonathan Wakely <jwakely@redhat.com> Diff: --- libstdc++-v3/include/std/type_traits | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) diff --git a/libstdc++-v3/include/std/type_traits b/libstdc++-v3/include/std/type_traits index 99ae825301c..1edd05acb4c 100644 --- a/libstdc++-v3/include/std/type_traits +++ b/libstdc++-v3/include/std/type_traits @@ -574,6 +574,13 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION struct is_rvalue_reference<_Tp&&> : public true_type { }; + /// is_member_object_pointer +#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_member_object_pointer) + template<typename _Tp> + struct is_member_object_pointer + : public __bool_constant<__is_member_object_pointer(_Tp)> + { }; +#else template<typename> struct __is_member_object_pointer_helper : public false_type { }; @@ -582,11 +589,12 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION struct __is_member_object_pointer_helper<_Tp _Cp::*> : public __not_<is_function<_Tp>>::type { }; - /// is_member_object_pointer + template<typename _Tp> struct is_member_object_pointer : public __is_member_object_pointer_helper<__remove_cv_t<_Tp>>::type { }; +#endif #if _GLIBCXX_USE_BUILTIN_TRAIT(__is_member_function_pointer) /// is_member_function_pointer @@ -3213,9 +3221,16 @@ template <typename _Tp> inline constexpr bool is_rvalue_reference_v = false; template <typename _Tp> inline constexpr bool is_rvalue_reference_v<_Tp&&> = true; + +#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_member_object_pointer) +template <typename _Tp> + inline constexpr bool is_member_object_pointer_v = + __is_member_object_pointer(_Tp); +#else template <typename _Tp> inline constexpr bool is_member_object_pointer_v = is_member_object_pointer<_Tp>::value; +#endif #if _GLIBCXX_USE_BUILTIN_TRAIT(__is_member_function_pointer) template <typename _Tp>
reply other threads:[~2023-12-16 17:00 UTC|newest] Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20231216170034.D91BE384770D@sourceware.org \ --to=kmatsui@gcc.gnu.org \ --cc=gcc-cvs@gcc.gnu.org \ --cc=libstdc++-cvs@gcc.gnu.org \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).