Message ID | 20240511090130.248174-11-kmatsui@gcc.gnu.org |
---|---|
State | New |
Headers | show |
Series | [v26,01/13] libstdc++: Optimize std::is_const compilation performance | expand |
On 11/05/24 02:01 -0700, Ken Matsui wrote: >This patch optimizes the compilation performance of std::rank >by dispatching to the new __array_rank built-in trait. OK, thanks. >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> >--- > libstdc++-v3/include/std/type_traits | 11 +++++++++++ > 1 file changed, 11 insertions(+) > >diff --git a/libstdc++-v3/include/std/type_traits b/libstdc++-v3/include/std/type_traits >index 4cc587d4e08..e9313205550 100644 >--- a/libstdc++-v3/include/std/type_traits >+++ b/libstdc++-v3/include/std/type_traits >@@ -1473,6 +1473,11 @@ _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> { }; >@@ -1484,6 +1489,7 @@ _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> >@@ -3583,12 +3589,17 @@ 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; >-- >2.44.0 >
diff --git a/libstdc++-v3/include/std/type_traits b/libstdc++-v3/include/std/type_traits index 4cc587d4e08..e9313205550 100644 --- a/libstdc++-v3/include/std/type_traits +++ b/libstdc++-v3/include/std/type_traits @@ -1473,6 +1473,11 @@ _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> { }; @@ -1484,6 +1489,7 @@ _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> @@ -3583,12 +3589,17 @@ 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;
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> --- libstdc++-v3/include/std/type_traits | 11 +++++++++++ 1 file changed, 11 insertions(+)