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 07/14] libstdc++: Optimize std::is_fundamental compilation performance
Date: Wed, 10 Jan 2024 01:22:58 -0800 [thread overview]
Message-ID: <20240110194031.2384005-8-kmatsui@gcc.gnu.org> (raw)
In-Reply-To: <20240110194031.2384005-1-kmatsui@gcc.gnu.org>
This patch optimizes the compilation performance of std::is_fundamental
by dispatching to the new __is_arithmetic built-in trait.
libstdc++-v3/ChangeLog:
* include/std/type_traits (is_fundamental_v): Use
__is_arithmetic built-in trait.
(is_fundamental): Likewise. Optimize the original
implementation.
Signed-off-by: Ken Matsui <kmatsui@gcc.gnu.org>
---
libstdc++-v3/include/std/type_traits | 20 ++++++++++++++++----
1 file changed, 16 insertions(+), 4 deletions(-)
diff --git a/libstdc++-v3/include/std/type_traits b/libstdc++-v3/include/std/type_traits
index 9baf3b2aa46..1c560d97e85 100644
--- a/libstdc++-v3/include/std/type_traits
+++ b/libstdc++-v3/include/std/type_traits
@@ -741,11 +741,21 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
#endif
/// is_fundamental
+#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_arithmetic)
+ template<typename _Tp>
+ struct is_fundamental
+ : public __bool_constant<__is_arithmetic(_Tp)
+ || is_void<_Tp>::value
+ || is_null_pointer<_Tp>::value>
+ { };
+#else
template<typename _Tp>
struct is_fundamental
- : public __or_<is_arithmetic<_Tp>, is_void<_Tp>,
- is_null_pointer<_Tp>>::type
+ : public __bool_constant<is_arithmetic<_Tp>::value
+ || is_void<_Tp>::value
+ || is_null_pointer<_Tp>::value>
{ };
+#endif
/// is_object
#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_object)
@@ -3327,13 +3337,15 @@ template <typename _Tp>
#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_arithmetic)
template <typename _Tp>
inline constexpr bool is_arithmetic_v = __is_arithmetic(_Tp);
+template <typename _Tp>
+ inline constexpr bool is_fundamental_v
+ = __is_arithmetic(_Tp) || is_void_v<_Tp> || is_null_pointer_v<_Tp>;
#else
template <typename _Tp>
inline constexpr bool is_arithmetic_v = is_arithmetic<_Tp>::value;
-#endif
-
template <typename _Tp>
inline constexpr bool is_fundamental_v = is_fundamental<_Tp>::value;
+#endif
#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_object)
template <typename _Tp>
--
2.43.0
next prev parent reply other threads:[~2024-01-10 19:41 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-10 9:22 [PATCH 00/14] Optimize integral-related type traits Ken Matsui
2024-01-10 9:22 ` [PATCH 01/14] c++: Implement __is_integral built-in trait Ken Matsui
2024-01-17 0:30 ` Jason Merrill
2024-01-17 7:42 ` Jonathan Wakely
2024-01-17 11:28 ` Joseph Myers
2024-01-10 9:22 ` [PATCH 02/14] libstdc++: Optimize std::is_integral compilation performance Ken Matsui
2024-01-10 21:19 ` Jonathan Wakely
2024-01-10 9:22 ` [PATCH 03/14] c++: Implement __is_floating_point built-in trait Ken Matsui
2024-01-17 0:36 ` Jason Merrill
2024-01-10 9:22 ` [PATCH 04/14] libstdc++: Optimize std::is_floating_point compilation performance Ken Matsui
2024-01-10 21:20 ` Jonathan Wakely
2024-01-10 9:22 ` [PATCH 05/14] c++: Implement __is_arithmetic built-in trait Ken Matsui
2024-01-10 9:22 ` [PATCH 06/14] libstdc++: Optimize std::is_arithmetic compilation performance Ken Matsui
2024-01-10 21:20 ` Jonathan Wakely
2024-01-10 9:22 ` Ken Matsui [this message]
2024-01-10 9:22 ` [PATCH 08/14] libstdc++: Optimize std::is_compound " Ken Matsui
2024-01-10 21:21 ` Jonathan Wakely
2024-01-11 3:02 ` Ken Matsui
2024-01-11 4:14 ` [committed] " Ken Matsui
2024-01-10 9:23 ` [PATCH 09/14] c++: Implement __is_unsigned built-in trait Ken Matsui
2024-01-17 0:41 ` Jason Merrill
2024-01-10 9:23 ` [PATCH 10/14] libstdc++: Optimize std::is_unsigned compilation performance Ken Matsui
2024-01-10 21:22 ` Jonathan Wakely
2024-01-10 9:23 ` [PATCH 11/14] c++: Implement __is_signed built-in trait Ken Matsui
2024-01-10 9:23 ` [PATCH 12/14] libstdc++: Optimize std::is_signed compilation performance Ken Matsui
2024-01-10 21:22 ` Jonathan Wakely
2024-01-10 9:23 ` [PATCH 13/14] c++: Implement __is_scalar built-in trait Ken Matsui
2024-01-10 19:59 ` Ken Matsui
2024-01-10 9:23 ` [PATCH 14/14] libstdc++: Optimize std::is_scalar compilation performance Ken Matsui
2024-01-10 21:22 ` Jonathan Wakely
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