| Message ID | 20240511090130.248174-2-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::is_volatile >by dispatching to the new __is_volatile built-in trait. OK, thanks. >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 8df0cf3ac3b..748fa186881 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); >-- >2.44.0 >
diff --git a/libstdc++-v3/include/std/type_traits b/libstdc++-v3/include/std/type_traits index 8df0cf3ac3b..748fa186881 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);
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(+)