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* [gcc r14-6632] libstdc++: Optimize std::remove_pointer compilation performance
@ 2023-12-16 17:00 Ken Matsui
0 siblings, 0 replies; only message in thread
From: Ken Matsui @ 2023-12-16 17:00 UTC (permalink / raw)
To: gcc-cvs, libstdc++-cvs
https://gcc.gnu.org/g:61d6dee992fdfa350a0c6d2a8151ec6e2844c419
commit r14-6632-g61d6dee992fdfa350a0c6d2a8151ec6e2844c419
Author: Ken Matsui <kmatsui@gcc.gnu.org>
Date: Mon Mar 20 14:05:48 2023 -0700
libstdc++: Optimize std::remove_pointer compilation performance
This patch optimizes the compilation performance of std::remove_pointer
by dispatching to the new remove_pointer built-in trait.
libstdc++-v3/ChangeLog:
* include/std/type_traits (remove_pointer): Use __remove_pointer
built-in trait.
Signed-off-by: Ken Matsui <kmatsui@gcc.gnu.org>
Reviewed-by: Jonathan Wakely <jwakely@redhat.com>
Diff:
---
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 2979d79a801..f00c07f94f9 100644
--- a/libstdc++-v3/include/std/type_traits
+++ b/libstdc++-v3/include/std/type_traits
@@ -2089,6 +2089,12 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
// Pointer modifications.
+ /// remove_pointer
+#if _GLIBCXX_USE_BUILTIN_TRAIT(__remove_pointer)
+ template<typename _Tp>
+ struct remove_pointer
+ { using type = __remove_pointer(_Tp); };
+#else
template<typename _Tp, typename>
struct __remove_pointer_helper
{ using type = _Tp; };
@@ -2097,11 +2103,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
struct __remove_pointer_helper<_Tp, _Up*>
{ using type = _Up; };
- /// remove_pointer
template<typename _Tp>
struct remove_pointer
: public __remove_pointer_helper<_Tp, __remove_cv_t<_Tp>>
{ };
+#endif
template<typename _Tp, typename = void>
struct __add_pointer_helper
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