[libcxx-commits] [libcxx] [libc++] Optimize vector growing of trivially relocatable types (PR #76657)

[Louis Dionne via libcxx-commits]

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@@ -273,6 +274,9 @@ class _LIBCPP_UNIQUE_PTR_TRIVIAL_ABI _LIBCPP_TEMPLATE_VIS unique_ptr {
   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 void swap(unique_ptr& __u) _NOEXCEPT { __ptr_.swap(__u.__ptr_); }
 };
 
+template <class _Tp>
+struct __libcpp_is_trivially_relocatable<unique_ptr<_Tp>> : true_type {};
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ldionne wrote:

This could work for any deleter that is trivially relocatable and for which `_Deleter::pointer` is trivially relocatable.

https://github.com/llvm/llvm-project/pull/76657