1 files changed, 3 insertions, 5 deletions

diff --git a/contrib/llvm-project/libcxx/include/__algorithm/copy_backward.h b/contrib/llvm-project/libcxx/include/__algorithm/copy_backward.h
index 3ec88d8bd5cc..73dc846a975a 100644
--- a/contrib/llvm-project/libcxx/include/__algorithm/copy_backward.h
+++ b/contrib/llvm-project/libcxx/include/__algorithm/copy_backward.h
@@ -15,7 +15,7 @@
 #include <__config>
 #include <__iterator/segmented_iterator.h>
 #include <__type_traits/common_type.h>
-#include <__type_traits/is_copy_constructible.h>
+#include <__type_traits/is_constructible.h>
 #include <__utility/move.h>
 #include <__utility/pair.h>
 
@@ -33,7 +33,7 @@ _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 pair<_InIter, _OutIter>
 __copy_backward(_InIter __first, _Sent __last, _OutIter __result);
 
 template <class _AlgPolicy>
-struct __copy_backward_loop {
+struct __copy_backward_impl {
   template <class _InIter, class _Sent, class _OutIter>
   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 pair<_InIter, _OutIter>
   operator()(_InIter __first, _Sent __last, _OutIter __result) const {
@@ -104,9 +104,7 @@ struct __copy_backward_loop {
       __local_last = _Traits::__end(__segment_iterator);
     }
   }
-};
 
-struct __copy_backward_trivial {
   // At this point, the iterators have been unwrapped so any `contiguous_iterator` has been unwrapped to a pointer.
   template <class _In, class _Out, __enable_if_t<__can_lower_copy_assignment_to_memmove<_In, _Out>::value, int> = 0>
   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 pair<_In*, _Out*>
@@ -118,7 +116,7 @@ struct __copy_backward_trivial {
 template <class _AlgPolicy, class _BidirectionalIterator1, class _Sentinel, class _BidirectionalIterator2>
 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 pair<_BidirectionalIterator1, _BidirectionalIterator2>
 __copy_backward(_BidirectionalIterator1 __first, _Sentinel __last, _BidirectionalIterator2 __result) {
-  return std::__dispatch_copy_or_move<_AlgPolicy, __copy_backward_loop<_AlgPolicy>, __copy_backward_trivial>(
+  return std::__copy_move_unwrap_iters<__copy_backward_impl<_AlgPolicy> >(
       std::move(__first), std::move(__last), std::move(__result));
 }