| Message ID | 20240511090130.248174-5-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::add_pointer >by dispatching to the new __add_pointer built-in trait. OK, thanks. >libstdc++-v3/ChangeLog: > > * include/std/type_traits (add_pointer): Use __add_pointer > built-in trait. > >Signed-off-by: Ken Matsui <kmatsui@gcc.gnu.org> >--- > libstdc++-v3/include/std/type_traits | 8 +++++++- > 1 file changed, 7 insertions(+), 1 deletion(-) > >diff --git a/libstdc++-v3/include/std/type_traits b/libstdc++-v3/include/std/type_traits >index 1562757f886..6313fde94c2 100644 >--- a/libstdc++-v3/include/std/type_traits >+++ b/libstdc++-v3/include/std/type_traits >@@ -2149,6 +2149,12 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION > { }; > #endif > >+ /// add_pointer >+#if _GLIBCXX_USE_BUILTIN_TRAIT(__add_pointer) >+ template<typename _Tp> >+ struct add_pointer >+ { using type = __add_pointer(_Tp); }; >+#else > template<typename _Tp, typename = void> > struct __add_pointer_helper > { using type = _Tp; }; >@@ -2157,7 +2163,6 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION > struct __add_pointer_helper<_Tp, __void_t<_Tp*>> > { using type = _Tp*; }; > >- /// add_pointer > template<typename _Tp> > struct add_pointer > : public __add_pointer_helper<_Tp> >@@ -2170,6 +2175,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION > template<typename _Tp> > struct add_pointer<_Tp&&> > { using type = _Tp*; }; >+#endif > > #if __cplusplus > 201103L > /// Alias template for remove_pointer >-- >2.44.0 >
diff --git a/libstdc++-v3/include/std/type_traits b/libstdc++-v3/include/std/type_traits index 1562757f886..6313fde94c2 100644 --- a/libstdc++-v3/include/std/type_traits +++ b/libstdc++-v3/include/std/type_traits @@ -2149,6 +2149,12 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION { }; #endif + /// add_pointer +#if _GLIBCXX_USE_BUILTIN_TRAIT(__add_pointer) + template<typename _Tp> + struct add_pointer + { using type = __add_pointer(_Tp); }; +#else template<typename _Tp, typename = void> struct __add_pointer_helper { using type = _Tp; }; @@ -2157,7 +2163,6 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION struct __add_pointer_helper<_Tp, __void_t<_Tp*>> { using type = _Tp*; }; - /// add_pointer template<typename _Tp> struct add_pointer : public __add_pointer_helper<_Tp> @@ -2170,6 +2175,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION template<typename _Tp> struct add_pointer<_Tp&&> { using type = _Tp*; }; +#endif #if __cplusplus > 201103L /// Alias template for remove_pointer
This patch optimizes the compilation performance of std::add_pointer by dispatching to the new __add_pointer built-in trait. libstdc++-v3/ChangeLog: * include/std/type_traits (add_pointer): Use __add_pointer built-in trait. Signed-off-by: Ken Matsui <kmatsui@gcc.gnu.org> --- libstdc++-v3/include/std/type_traits | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)