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 v2 3/3] libstdc++: Optimize is_fundamental performance by __is_arithmetic built-in
Date: Fri, 14 Jul 2023 21:55:19 -0700 [thread overview]
Message-ID: <20230715045519.50684-3-kmatsui@gcc.gnu.org> (raw)
In-Reply-To: <20230715045519.50684-1-kmatsui@gcc.gnu.org>
This patch optimizes the performance of the is_fundamental trait 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 | 21 +++++++++++++++++----
1 file changed, 17 insertions(+), 4 deletions(-)
diff --git a/libstdc++-v3/include/std/type_traits b/libstdc++-v3/include/std/type_traits
index 7ebbe04c77b..cf24de2fcac 100644
--- a/libstdc++-v3/include/std/type_traits
+++ b/libstdc++-v3/include/std/type_traits
@@ -668,11 +668,21 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
#endif
/// is_fundamental
+#if __has_builtin(__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
template<typename _Tp>
@@ -3209,13 +3219,16 @@ template <typename _Tp>
#if __has_builtin(__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
+
template <typename _Tp>
inline constexpr bool is_object_v = is_object<_Tp>::value;
template <typename _Tp>
--
2.41.0
next prev parent reply other threads:[~2023-07-15 4:57 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-07-09 12:57 [PATCH 1/2] c++, libstdc++: implement __is_arithmetic built-in trait Ken Matsui
2023-07-09 12:57 ` [PATCH 2/2] libstdc++: use new built-in trait __is_arithmetic Ken Matsui
2023-07-09 13:03 ` [PATCH 1/2] c++, libstdc++: implement __is_arithmetic built-in trait Ken Matsui
2023-07-15 4:55 ` [PATCH v2 1/3] c++, libstdc++: Implement " Ken Matsui
2023-07-15 4:55 ` [PATCH v2 2/3] libstdc++: Optimize is_arithmetic performance by __is_arithmetic built-in Ken Matsui
2023-07-16 12:32 ` François Dumont
2023-07-17 4:48 ` Ken Matsui
2023-07-22 13:39 ` François Dumont
2023-08-08 20:09 ` Jonathan Wakely
2023-08-08 20:28 ` Jonathan Wakely
2023-07-15 4:55 ` Ken Matsui [this message]
2023-07-15 5:07 ` [PATCH v2 3/3] libstdc++: Optimize is_fundamental " Ken Matsui
2023-07-16 12:41 ` François Dumont
2023-07-17 4:49 ` Ken Matsui
2023-07-18 6:24 ` Ken Matsui
2023-07-18 6:26 ` Ken Matsui
2023-08-08 20:14 ` Jonathan Wakely
2023-08-31 13:47 ` Ken Matsui
2023-07-22 13:45 ` François Dumont
2023-08-08 20:18 ` Jonathan Wakely
2023-08-31 13:57 ` Ken Matsui
2023-08-31 15:01 ` Ken Matsui
2023-07-16 12:27 ` [PATCH v2 1/3] c++, libstdc++: Implement __is_arithmetic built-in trait François Dumont
2023-07-17 4:46 ` Ken Matsui
2023-07-18 6:27 ` [PATCH v3 " Ken Matsui
2023-07-18 6:27 ` [PATCH v3 2/3] libstdc++: Optimize is_arithmetic performance by __is_arithmetic built-in Ken Matsui
2023-07-18 6:27 ` [PATCH v3 3/3] libstdc++: Optimize is_fundamental " Ken Matsui
2023-07-18 7:40 ` [PATCH v4 1/4] c++, libstdc++: Implement __is_arithmetic built-in trait Ken Matsui
2023-07-18 7:40 ` [PATCH v4 2/4] libstdc++: Optimize is_arithmetic trait performance Ken Matsui
2023-07-18 7:40 ` [PATCH v4 3/4] libstdc++: Optimize is_fundamental " Ken Matsui
2023-07-18 7:40 ` [PATCH v4 4/4] libstdc++: Optimize is_compound " Ken Matsui
2023-08-08 20:33 ` Jonathan Wakely
2023-09-01 10:40 ` Ken Matsui
2023-07-22 13:50 ` [PATCH v3 1/3] c++, libstdc++: Implement __is_arithmetic built-in trait François Dumont
2023-08-08 20:04 ` Jonathan Wakely
2023-09-01 11:25 ` [PATCH v5 1/4] " Ken Matsui
2023-09-01 11:25 ` [PATCH v5 2/4] libstdc++: Optimize is_arithmetic trait performance Ken Matsui
2023-09-01 11:25 ` [PATCH v5 3/4] libstdc++: Optimize is_fundamental " Ken Matsui
2023-09-01 11:25 ` [PATCH v5 4/4] libstdc++: Optimize is_compound " Ken Matsui
2023-09-04 10:27 ` [PATCH v5 1/4] c++, libstdc++: Implement __is_arithmetic built-in trait Jonathan Wakely
2023-09-04 15:00 ` Ken Matsui
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