Message ID | 20240228192843.188979-5-kmatsui@gcc.gnu.org |
---|---|
State | Unresolved |
Headers |
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Series |
Optimize more type traits
|
|
Checks
Context | Check | Description |
---|---|---|
snail/gcc-patch-check | warning | Git am fail log |
Commit Message
Ken Matsui
Feb. 28, 2024, 7:26 p.m. UTC
This patch optimizes the compilation performance of std::is_volatile
by dispatching to the new __is_volatile built-in trait.
libstdc++-v3/ChangeLog:
* include/std/type_traits (is_volatile): Use __is_volatile
built-in trait.
(is_volatile_v): Likewise.
Signed-off-by: Ken Matsui <kmatsui@gcc.gnu.org>
---
libstdc++-v3/include/std/type_traits | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/libstdc++-v3/include/std/type_traits b/libstdc++-v3/include/std/type_traits index 6e9ebfb8a18..60cd22b6f15 100644 --- a/libstdc++-v3/include/std/type_traits +++ b/libstdc++-v3/include/std/type_traits @@ -851,6 +851,12 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION #endif /// is_volatile +#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_volatile) + template<typename _Tp> + struct is_volatile + : public __bool_constant<__is_volatile(_Tp)> + { }; +#else template<typename> struct is_volatile : public false_type { }; @@ -858,6 +864,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION template<typename _Tp> struct is_volatile<_Tp volatile> : public true_type { }; +#endif /// is_trivial template<typename _Tp> @@ -3356,10 +3363,15 @@ template <typename _Tp> inline constexpr bool is_function_v<_Tp&&> = false; #endif +#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_volatile) +template <typename _Tp> + inline constexpr bool is_volatile_v = __is_volatile(_Tp); +#else template <typename _Tp> inline constexpr bool is_volatile_v = false; template <typename _Tp> inline constexpr bool is_volatile_v<volatile _Tp> = true; +#endif template <typename _Tp> inline constexpr bool is_trivial_v = __is_trivial(_Tp);