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| author | Ken Matsui <kmatsui@gcc.gnu.org> | 2024-02-15 07:19:02 -0800 |
|---|---|---|
| committer | Ken Matsui <kmatsui@gcc.gnu.org> | 2024-06-13 05:56:45 -0700 |
| commit | 6f0dfa6f1acdf78d764d6f5d6f53c2f2a768c047 (patch) | |
| tree | 1e615a2e3f74c5638e51e723c2909428285e3eea | |
| parent | 9d0dba02c5452d5906f87e59455a4c38944eb217 (diff) | |
| download | gcc-6f0dfa6f1acdf78d764d6f5d6f53c2f2a768c047.zip gcc-6f0dfa6f1acdf78d764d6f5d6f53c2f2a768c047.tar.gz gcc-6f0dfa6f1acdf78d764d6f5d6f53c2f2a768c047.tar.bz2 | |
libstdc++: Optimize std::rank compilation performance
This patch optimizes the compilation performance of std::rank
by dispatching to the new __array_rank built-in trait.
libstdc++-v3/ChangeLog:
* include/std/type_traits (rank): Use __array_rank built-in
trait.
(rank_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 | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/libstdc++-v3/include/std/type_traits b/libstdc++-v3/include/std/type_traits index 3d158f9..5402574 100644 --- a/libstdc++-v3/include/std/type_traits +++ b/libstdc++-v3/include/std/type_traits @@ -1447,6 +1447,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION }; /// rank +#if _GLIBCXX_USE_BUILTIN_TRAIT(__array_rank) + template<typename _Tp> + struct rank + : public integral_constant<std::size_t, __array_rank(_Tp)> { }; +#else template<typename> struct rank : public integral_constant<std::size_t, 0> { }; @@ -1458,6 +1463,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION template<typename _Tp> struct rank<_Tp[]> : public integral_constant<std::size_t, 1 + rank<_Tp>::value> { }; +#endif /// extent template<typename, unsigned _Uint = 0> @@ -3531,12 +3537,17 @@ template <typename _Tp> template <typename _Tp> inline constexpr size_t alignment_of_v = alignment_of<_Tp>::value; +#if _GLIBCXX_USE_BUILTIN_TRAIT(__array_rank) +template <typename _Tp> + inline constexpr size_t rank_v = __array_rank(_Tp); +#else template <typename _Tp> inline constexpr size_t rank_v = 0; template <typename _Tp, size_t _Size> inline constexpr size_t rank_v<_Tp[_Size]> = 1 + rank_v<_Tp>; template <typename _Tp> inline constexpr size_t rank_v<_Tp[]> = 1 + rank_v<_Tp>; +#endif template <typename _Tp, unsigned _Idx = 0> inline constexpr size_t extent_v = 0; |