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 v5 12/14] libstdc++: Optimize std::decay compilation performance
Date: Thu, 15 Feb 2024 07:20:35 -0800 [thread overview]
Message-ID: <20240215152037.720162-12-kmatsui@gcc.gnu.org> (raw)
In-Reply-To: <20240215152037.720162-1-kmatsui@gcc.gnu.org>
This patch optimizes the compilation performance of std::decay
by dispatching to the new __decay built-in trait.
libstdc++-v3/ChangeLog:
* include/std/type_traits (decay): Use __decay built-in trait.
Signed-off-by: Ken Matsui <kmatsui@gcc.gnu.org>
---
libstdc++-v3/include/std/type_traits | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/libstdc++-v3/include/std/type_traits b/libstdc++-v3/include/std/type_traits
index 219d36fabba..90718d772dd 100644
--- a/libstdc++-v3/include/std/type_traits
+++ b/libstdc++-v3/include/std/type_traits
@@ -2288,6 +2288,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
/// @cond undocumented
+#if _GLIBCXX_USE_BUILTIN_TRAIT(__decay)
+ template<typename _Tp>
+ struct decay
+ { using type = __decay(_Tp); };
+#else
// Decay trait for arrays and functions, used for perfect forwarding
// in make_pair, make_tuple, etc.
template<typename _Up>
@@ -2319,6 +2324,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
template<typename _Tp>
struct decay<_Tp&&>
{ using type = typename __decay_selector<_Tp>::type; };
+#endif
/// @cond undocumented
--
2.43.0
next prev parent reply other threads:[~2024-02-15 15:21 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-14 11:44 [PATCH 1/2] c++: Implement __add_pointer built-in trait Ken Matsui
2024-02-14 11:44 ` [PATCH 2/2] libstdc++: Optimize std::add_pointer compilation performance Ken Matsui
2024-02-14 13:52 ` [PATCH v2 1/4] c++: Implement __add_pointer built-in trait Ken Matsui
2024-02-14 13:52 ` [PATCH v2 2/4] libstdc++: Optimize std::add_pointer compilation performance Ken Matsui
2024-02-14 20:20 ` Patrick Palka
2024-02-14 13:52 ` [PATCH v2 3/4] c++: Implement __remove_extent built-in trait Ken Matsui
2024-02-14 20:20 ` Patrick Palka
2024-02-14 13:52 ` [PATCH v2 4/4] libstdc++: Optimize std::remove_extent compilation performance Ken Matsui
2024-02-14 20:21 ` Patrick Palka
2024-02-14 20:18 ` [PATCH v2 1/4] c++: Implement __add_pointer built-in trait Patrick Palka
2024-02-15 4:17 ` Ken Matsui
2024-02-15 4:52 ` [PATCH v3 " Ken Matsui
2024-02-15 12:48 ` [PATCH v4 05/12] c++: Implement __remove_all_extents " Ken Matsui
2024-02-15 12:48 ` [PATCH v4 06/12] libstdc++: Optimize std::remove_all_extents compilation performance Ken Matsui
2024-02-15 12:48 ` [PATCH v4 07/12] c++: Implement __add_lvalue_reference built-in trait Ken Matsui
2024-02-15 12:48 ` [PATCH v4 08/12] libstdc++: Optimize std::add_lvalue_reference compilation performance Ken Matsui
2024-02-15 12:48 ` [PATCH v4 09/12] c++: Implement __add_rvalue_reference built-in trait Ken Matsui
2024-02-15 12:48 ` [PATCH v4 10/12] libstdc++: Optimize std::add_rvalue_reference compilation performance Ken Matsui
2024-02-15 12:48 ` [PATCH v4 11/12] c++: Implement __decay built-in trait Ken Matsui
2024-02-15 12:48 ` [PATCH v4 12/12] libstdc++: Optimize std::decay compilation performance Ken Matsui
2024-02-15 15:20 ` [PATCH v5 01/14] c++: Implement __add_pointer built-in trait Ken Matsui
2024-02-15 15:20 ` [PATCH v5 02/14] libstdc++: Optimize std::add_pointer compilation performance Ken Matsui
2024-02-15 15:20 ` [PATCH v5 03/14] c++: Implement __remove_extent built-in trait Ken Matsui
2024-02-15 15:20 ` [PATCH v5 04/14] libstdc++: Optimize std::remove_extent compilation performance Ken Matsui
2024-02-15 15:20 ` [PATCH v5 05/14] c++: Implement __remove_all_extents built-in trait Ken Matsui
2024-02-15 15:20 ` [PATCH v5 06/14] libstdc++: Optimize std::remove_all_extents compilation performance Ken Matsui
2024-02-15 15:20 ` [PATCH v5 07/14] c++: Implement __add_lvalue_reference built-in trait Ken Matsui
2024-02-15 15:20 ` [PATCH v5 08/14] libstdc++: Optimize std::add_lvalue_reference compilation performance Ken Matsui
2024-02-15 15:20 ` [PATCH v5 09/14] c++: Implement __add_rvalue_reference built-in trait Ken Matsui
2024-02-15 15:20 ` [PATCH v5 10/14] libstdc++: Optimize std::add_rvalue_reference compilation performance Ken Matsui
2024-02-15 15:20 ` [PATCH v5 11/14] c++: Implement __decay built-in trait Ken Matsui
2024-02-15 15:20 ` Ken Matsui [this message]
2024-02-15 15:20 ` [PATCH v5 13/14] c++: Implement __rank " Ken Matsui
2024-02-15 21:48 ` Patrick Palka
2024-02-16 2:14 ` Ken Matsui
2024-02-16 2:22 ` Ken Matsui
2024-02-16 2:15 ` [PATCH v6 " Ken Matsui
2024-02-15 15:20 ` [PATCH v5 14/14] libstdc++: Optimize std::rank compilation performance Ken Matsui
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