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| author | Ken Matsui <kmatsui@gcc.gnu.org> | 2023-03-21 08:57:14 -0700 |
|---|---|---|
| committer | Ken Matsui <kmatsui@gcc.gnu.org> | 2023-12-16 08:59:30 -0800 |
| commit | 7fd9c349e455345a8b94d8fcee1c92b5c92873a5 (patch) | |
| tree | ca5757f84e68666d215ea882c26e63b01dc6fd40 | |
| parent | 5f1bed2a7af828103ca23a3546466a23e8dd2f30 (diff) | |
| download | gcc-7fd9c349e455345a8b94d8fcee1c92b5c92873a5.zip gcc-7fd9c349e455345a8b94d8fcee1c92b5c92873a5.tar.gz gcc-7fd9c349e455345a8b94d8fcee1c92b5c92873a5.tar.bz2 | |
libstdc++: Optimize std::is_array compilation performance
This patch optimizes the compilation performance of std::is_array
by dispatching to the new __is_array built-in trait.
libstdc++-v3/ChangeLog:
* include/std/type_traits (is_array): Use __is_array built-in
trait.
(is_array_v): Likewise.
Signed-off-by: Ken Matsui <kmatsui@gcc.gnu.org>
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 677cd93..64f9d67 100644 --- a/libstdc++-v3/include/std/type_traits +++ b/libstdc++-v3/include/std/type_traits @@ -523,6 +523,12 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION { }; /// is_array +#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_array) + template<typename _Tp> + struct is_array + : public __bool_constant<__is_array(_Tp)> + { }; +#else template<typename> struct is_array : public false_type { }; @@ -534,6 +540,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION template<typename _Tp> struct is_array<_Tp[]> : public true_type { }; +#endif template<typename> struct __is_pointer_helper @@ -3169,12 +3176,17 @@ template <typename _Tp> template <typename _Tp> inline constexpr bool is_floating_point_v = is_floating_point<_Tp>::value; +#if _GLIBCXX_USE_BUILTIN_TRAIT(__is_array) +template <typename _Tp> + inline constexpr bool is_array_v = __is_array(_Tp); +#else template <typename _Tp> inline constexpr bool is_array_v = false; template <typename _Tp> inline constexpr bool is_array_v<_Tp[]> = true; template <typename _Tp, size_t _Num> inline constexpr bool is_array_v<_Tp[_Num]> = true; +#endif template <typename _Tp> inline constexpr bool is_pointer_v = is_pointer<_Tp>::value; |