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| author | Ken Matsui <kmatsui@gcc.gnu.org> | 2024-02-14 23:22:57 -0800 |
|---|---|---|
| committer | Ken Matsui <kmatsui@gcc.gnu.org> | 2024-06-13 07:00:06 -0700 |
| commit | 13a07c1420b35ac7649f7d8a776b553ec5c26269 (patch) | |
| tree | 2285ad572273cd0fe13d411360a9323b9e8ee0e0 | |
| parent | 014879ea4c86b3b8ab6b61a1226ee5b31e816c8b (diff) | |
| download | gcc-13a07c1420b35ac7649f7d8a776b553ec5c26269.zip gcc-13a07c1420b35ac7649f7d8a776b553ec5c26269.tar.gz gcc-13a07c1420b35ac7649f7d8a776b553ec5c26269.tar.bz2 | |
libstdc++: Optimize std::add_lvalue_reference compilation performance
This patch optimizes the compilation performance of
std::add_lvalue_reference by dispatching to the new
__add_lvalue_reference built-in trait.
libstdc++-v3/ChangeLog:
* include/std/type_traits (__add_lval_ref_t): Use
__add_lvalue_reference built-in trait.
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 | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/libstdc++-v3/include/std/type_traits b/libstdc++-v3/include/std/type_traits index 0ef1129..79983ea 100644 --- a/libstdc++-v3/include/std/type_traits +++ b/libstdc++-v3/include/std/type_traits @@ -1157,6 +1157,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION }; /// @cond undocumented +#if _GLIBCXX_USE_BUILTIN_TRAIT(__add_lvalue_reference) + template<typename _Tp> + using __add_lval_ref_t = __add_lvalue_reference(_Tp); +#else template<typename _Tp, typename = void> struct __add_lvalue_reference_helper { using type = _Tp; }; @@ -1167,6 +1171,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION template<typename _Tp> using __add_lval_ref_t = typename __add_lvalue_reference_helper<_Tp>::type; +#endif /// @endcond /// is_copy_constructible |