diff options
| author | Ken Matsui <kmatsui@gcc.gnu.org> | 2023-03-22 16:28:06 -0700 |
|---|---|---|
| committer | Ken Matsui <kmatsui@gcc.gnu.org> | 2024-06-13 05:55:47 -0700 |
| commit | bb99672e0c49d8b8822664eaabc10cd51a42aab4 (patch) | |
| tree | e5cd1f9c9d7a4306c65f0915907a8bb7f8814d9c | |
| parent | eea62ce6fbcffb8acc227e5dbed74d2b627ce84d (diff) | |
| download | gcc-bb99672e0c49d8b8822664eaabc10cd51a42aab4.zip gcc-bb99672e0c49d8b8822664eaabc10cd51a42aab4.tar.gz gcc-bb99672e0c49d8b8822664eaabc10cd51a42aab4.tar.bz2 | |
libstdc++: Optimize std::is_volatile compilation performance
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>
Reviewed-by: Patrick Palka <ppalka@redhat.com>
Reviewed-by: Jonathan Wakely <jwakely@redhat.com>
| -rw-r--r-- | libstdc++-v3/include/std/type_traits | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/libstdc++-v3/include/std/type_traits b/libstdc++-v3/include/std/type_traits index 8df0cf3..748fa18 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> @@ -3360,10 +3367,15 @@ 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); |