diff --git a/libcxx/include/CMakeLists.txt b/libcxx/include/CMakeLists.txt
index 29b693b4550921..71c30e73b5ba78 100644
--- a/libcxx/include/CMakeLists.txt
+++ b/libcxx/include/CMakeLists.txt
@@ -384,7 +384,6 @@ set(files
   __memory/ranges_uninitialized_algorithms.h
   __memory/raw_storage_iterator.h
   __memory/shared_ptr.h
-  __memory/swap_allocator.h
   __memory/temporary_buffer.h
   __memory/uninitialized_algorithms.h
   __memory/unique_ptr.h
diff --git a/libcxx/include/__hash_table b/libcxx/include/__hash_table
index 959ef7fe7d83c1..6123a310ad636a 100644
--- a/libcxx/include/__hash_table
+++ b/libcxx/include/__hash_table
@@ -18,7 +18,6 @@
 #include <__debug>
 #include <__functional/hash.h>
 #include <__iterator/iterator_traits.h>
-#include <__memory/swap_allocator.h>
 #include <__utility/swap.h>
 #include <cmath>
 #include <initializer_list>
diff --git a/libcxx/include/__memory/swap_allocator.h b/libcxx/include/__memory/swap_allocator.h
deleted file mode 100644
index 64970fa9e2f407..00000000000000
--- a/libcxx/include/__memory/swap_allocator.h
+++ /dev/null
@@ -1,53 +0,0 @@
-//===----------------------------------------------------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef _LIBCPP___MEMORY_SWAP_ALLOCATOR_H
-#define _LIBCPP___MEMORY_SWAP_ALLOCATOR_H
-
-#include <__config>
-#include <__memory/allocator_traits.h>
-#include <__type_traits/integral_constant.h>
-#include <__utility/swap.h>
-
-#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#  pragma GCC system_header
-#endif
-
-_LIBCPP_BEGIN_NAMESPACE_STD
-
-template <typename _Alloc>
-_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX11 void __swap_allocator(_Alloc& __a1, _Alloc& __a2, true_type)
-#if _LIBCPP_STD_VER > 11
-    _NOEXCEPT
-#else
-    _NOEXCEPT_(__is_nothrow_swappable<_Alloc>::value)
-#endif
-{
-  using _VSTD::swap;
-  swap(__a1, __a2);
-}
-
-template <typename _Alloc>
-inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX11 void
-__swap_allocator(_Alloc&, _Alloc&, false_type) _NOEXCEPT {}
-
-template <typename _Alloc>
-inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX11 void __swap_allocator(_Alloc& __a1, _Alloc& __a2)
-#if _LIBCPP_STD_VER > 11
-    _NOEXCEPT
-#else
-    _NOEXCEPT_(__is_nothrow_swappable<_Alloc>::value)
-#endif
-{
-  _VSTD::__swap_allocator(
-      __a1, __a2, integral_constant<bool, allocator_traits<_Alloc>::propagate_on_container_swap::value>());
-}
-
-_LIBCPP_END_NAMESPACE_STD
-
-#endif // _LIBCPP___MEMORY_SWAP_ALLOCATOR_H
diff --git a/libcxx/include/__memory/uninitialized_algorithms.h b/libcxx/include/__memory/uninitialized_algorithms.h
index 8b8fef1aa5971b..3a8560f080c696 100644
--- a/libcxx/include/__memory/uninitialized_algorithms.h
+++ b/libcxx/include/__memory/uninitialized_algorithms.h
@@ -10,17 +10,12 @@
 #ifndef _LIBCPP___MEMORY_UNINITIALIZED_ALGORITHMS_H
 #define _LIBCPP___MEMORY_UNINITIALIZED_ALGORITHMS_H
 
-#include <__algorithm/copy.h>
-#include <__algorithm/move.h>
 #include <__config>
 #include <__iterator/iterator_traits.h>
-#include <__iterator/reverse_iterator.h>
 #include <__memory/addressof.h>
 #include <__memory/allocator_traits.h>
 #include <__memory/construct_at.h>
-#include <__memory/pointer_traits.h>
 #include <__memory/voidify.h>
-#include <__type_traits/is_constant_evaluated.h>
 #include <__utility/move.h>
 #include <__utility/pair.h>
 #include <__utility/transaction.h>
@@ -352,7 +347,6 @@ uninitialized_move_n(_InputIterator __ifirst, _Size __n, _ForwardIterator __ofir
                                                    __unreachable_sentinel(), __iter_move);
 }
 
-// TODO: Rewrite this to iterate left to right and use reverse_iterators when calling
 // Destroys every element in the range [first, last) FROM RIGHT TO LEFT using allocator
 // destruction. If elements are themselves C-style arrays, they are recursively destroyed
 // in the same manner.
@@ -498,133 +492,6 @@ constexpr void __uninitialized_allocator_value_construct_n(_Alloc& __alloc, _Bid
 
 #endif // _LIBCPP_STD_VER > 14
 
-// Destroy all elements in [__first, __last) from left to right using allocator destruction.
-template <class _Alloc, class _Iter, class _Sent>
-_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX17 void
-__allocator_destroy(_Alloc& __alloc, _Iter __first, _Sent __last) {
-  for (; __first != __last; ++__first)
-    allocator_traits<_Alloc>::destroy(__alloc, std::__to_address(__first));
-}
-
-template <class _Alloc, class _Iter>
-class _AllocatorDestroyRangeReverse {
-public:
-  _AllocatorDestroyRangeReverse(_Alloc& __alloc, _Iter& __first, _Iter& __last)
-      : __alloc_(__alloc), __first_(__first), __last_(__last) {}
-
-  _LIBCPP_CONSTEXPR_AFTER_CXX11 void operator()() const {
-    std::__allocator_destroy(__alloc_, std::reverse_iterator<_Iter>(__last_), std::reverse_iterator<_Iter>(__first_));
-  }
-
-private:
-  _Alloc& __alloc_;
-  _Iter& __first_;
-  _Iter& __last_;
-};
-
-// Copy-construct [__first1, __last1) in [__first2, __first2 + N), where N is distance(__first1, __last1).
-//
-// The caller has to ensure that __first2 can hold at least N uninitialized elements. If an exception is thrown the
-// already copied elements are destroyed in reverse order of their construction.
-template <class _Alloc, class _Iter1, class _Sent1, class _Iter2>
-_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX17 _Iter2
-__uninitialized_allocator_copy(_Alloc& __alloc, _Iter1 __first1, _Sent1 __last1, _Iter2 __first2) {
-  auto __destruct_first = __first2;
-  auto __guard =
-      std::__make_transaction(_AllocatorDestroyRangeReverse<_Alloc, _Iter2>(__alloc, __destruct_first, __first2));
-  while (__first1 != __last1) {
-    allocator_traits<_Alloc>::construct(__alloc, std::__to_address(__first2), *__first1);
-    ++__first1;
-    ++__first2;
-  }
-  __guard.__complete();
-  return __first2;
-}
-
-template <class _Alloc, class _Type>
-struct __allocator_has_trivial_copy_construct : _Not<__has_construct<_Alloc, _Type*, const _Type&> > {};
-
-template <class _Type>
-struct __allocator_has_trivial_copy_construct<allocator<_Type>, _Type> : true_type {};
-
-template <class _Alloc,
-          class _Type,
-          class _RawType = typename remove_const<_Type>::type,
-          __enable_if_t<
-              // using _RawType because of the allocator<T const> extension
-              is_trivially_copy_constructible<_RawType>::value && is_trivially_copy_assignable<_RawType>::value &&
-              __allocator_has_trivial_copy_construct<_Alloc, _RawType>::value>* = nullptr>
-_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX17 _Type*
-__uninitialized_allocator_copy(_Alloc&, const _Type* __first1, const _Type* __last1, _Type* __first2) {
-  // TODO: Remove the const_cast once we drop support for std::allocator<T const>
-  if (__libcpp_is_constant_evaluated()) {
-    while (__first1 != __last1) {
-      std::__construct_at(std::__to_address(__first2), *__first1);
-      ++__first1;
-      ++__first2;
-    }
-    return __first2;
-  } else {
-    return std::copy(__first1, __last1, const_cast<_RawType*>(__first2));
-  }
-}
-
-// Move-construct the elements [__first1, __last1) into [__first2, __first2 + N)
-// if the move constructor is noexcept, where N is distance(__first1, __last1).
-//
-// Otherwise try to copy all elements. If an exception is thrown the already copied
-// elements are destroyed in reverse order of their construction.
-template <class _Alloc, class _Iter1, class _Sent1, class _Iter2>
-_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX17 _Iter2 __uninitialized_allocator_move_if_noexcept(
-    _Alloc& __alloc, _Iter1 __first1, _Sent1 __last1, _Iter2 __first2) {
-  static_assert(__is_cpp17_move_insertable<_Alloc>::value,
-                "The specified type does not meet the requirements of Cpp17MoveInsertable");
-  auto __destruct_first = __first2;
-  auto __guard =
-      std::__make_transaction(_AllocatorDestroyRangeReverse<_Alloc, _Iter2>(__alloc, __destruct_first, __first2));
-
-  while (__first1 != __last1) {
-#ifndef _LIBCPP_NO_EXCEPTIONS
-    allocator_traits<_Alloc>::construct(__alloc, std::__to_address(__first2), std::move_if_noexcept(*__first1));
-#else
-    allocator_traits<_Alloc>::construct(__alloc, std::__to_address(__first2), std::move(*__first1));
-#endif
-    ++__first1;
-    ++__first2;
-  }
-  __guard.__complete();
-  return __first2;
-}
-
-template <class _Alloc, class _Type>
-struct __allocator_has_trivial_move_construct : _Not<__has_construct<_Alloc, _Type*, _Type&&> > {};
-
-template <class _Type>
-struct __allocator_has_trivial_move_construct<allocator<_Type>, _Type> : true_type {};
-
-#ifndef _LIBCPP_COMPILER_GCC
-template <
-    class _Alloc,
-    class _Iter1,
-    class _Iter2,
-    class _Type = typename iterator_traits<_Iter1>::value_type,
-    class = __enable_if_t<is_trivially_move_constructible<_Type>::value && is_trivially_move_assignable<_Type>::value &&
-                          __allocator_has_trivial_move_construct<_Alloc, _Type>::value> >
-_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX17 _Iter1
-__uninitialized_allocator_move_if_noexcept(_Alloc&, _Iter1 __first1, _Iter1 __last1, _Iter2 __first2) {
-  if (__libcpp_is_constant_evaluated()) {
-    while (__first1 != __last1) {
-      std::__construct_at(std::__to_address(__first2), std::move(*__first1));
-      ++__first1;
-      ++__first2;
-    }
-    return __first2;
-  } else {
-    return std::move(__first1, __last1, __first2);
-  }
-}
-#endif // _LIBCPP_COMPILER_GCC
-
 _LIBCPP_END_NAMESPACE_STD
 
 #endif // _LIBCPP___MEMORY_UNINITIALIZED_ALGORITHMS_H
diff --git a/libcxx/include/__split_buffer b/libcxx/include/__split_buffer
index f7816746621753..7409b51b1f96b4 100644
--- a/libcxx/include/__split_buffer
+++ b/libcxx/include/__split_buffer
@@ -19,7 +19,6 @@
 #include <__iterator/move_iterator.h>
 #include <__memory/allocator.h>
 #include <__memory/compressed_pair.h>
-#include <__memory/swap_allocator.h>
 #include <__utility/forward.h>
 #include <memory>
 #include <type_traits>
diff --git a/libcxx/include/__tree b/libcxx/include/__tree
index 59525a03047aed..8d8449706871f6 100644
--- a/libcxx/include/__tree
+++ b/libcxx/include/__tree
@@ -17,7 +17,6 @@
 #include <__iterator/distance.h>
 #include <__iterator/iterator_traits.h>
 #include <__iterator/next.h>
-#include <__memory/swap_allocator.h>
 #include <__utility/forward.h>
 #include <__utility/swap.h>
 #include <limits>
diff --git a/libcxx/include/__utility/transaction.h b/libcxx/include/__utility/transaction.h
index e2cc4382084516..87e51c0b198e01 100644
--- a/libcxx/include/__utility/transaction.h
+++ b/libcxx/include/__utility/transaction.h
@@ -86,11 +86,6 @@ struct __transaction {
     bool __completed_;
 };
 
-template <class _Rollback>
-_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR __transaction<_Rollback> __make_transaction(_Rollback __rollback) {
-  return __transaction<_Rollback>(std::move(__rollback));
-}
-
 _LIBCPP_END_NAMESPACE_STD
 
 #endif // _LIBCPP___UTILITY_TRANSACTION_H
diff --git a/libcxx/include/forward_list b/libcxx/include/forward_list
index ee90aaa4771f18..aab3b8715d0140 100644
--- a/libcxx/include/forward_list
+++ b/libcxx/include/forward_list
@@ -188,7 +188,6 @@ template <class T, class Allocator, class Predicate>
 #include <__iterator/iterator_traits.h>
 #include <__iterator/move_iterator.h>
 #include <__iterator/next.h>
-#include <__memory/swap_allocator.h>
 #include <__utility/forward.h>
 #include <limits>
 #include <memory>
diff --git a/libcxx/include/list b/libcxx/include/list
index 5fcbd67c670368..1db29d14b84208 100644
--- a/libcxx/include/list
+++ b/libcxx/include/list
@@ -194,7 +194,6 @@ template <class T, class Allocator, class Predicate>
 #include <__iterator/next.h>
 #include <__iterator/prev.h>
 #include <__iterator/reverse_iterator.h>
-#include <__memory/swap_allocator.h>
 #include <__utility/forward.h>
 #include <__utility/move.h>
 #include <__utility/swap.h>
diff --git a/libcxx/include/memory b/libcxx/include/memory
index 56f8159fbd4456..ec9f5773929f7a 100644
--- a/libcxx/include/memory
+++ b/libcxx/include/memory
@@ -885,6 +885,93 @@ template<size_t N, class T>
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
+template <class _Alloc, class _Ptr>
+_LIBCPP_INLINE_VISIBILITY
+void __construct_forward_with_exception_guarantees(_Alloc& __a, _Ptr __begin1, _Ptr __end1, _Ptr& __begin2) {
+    static_assert(__is_cpp17_move_insertable<_Alloc>::value,
+        "The specified type does not meet the requirements of Cpp17MoveInsertable");
+    typedef allocator_traits<_Alloc> _Traits;
+    for (; __begin1 != __end1; ++__begin1, (void)++__begin2) {
+        _Traits::construct(__a, _VSTD::__to_address(__begin2),
+#ifdef _LIBCPP_NO_EXCEPTIONS
+            _VSTD::move(*__begin1)
+#else
+            _VSTD::move_if_noexcept(*__begin1)
+#endif
+        );
+    }
+}
+
+template <class _Alloc, class _Tp, typename enable_if<
+    (__is_default_allocator<_Alloc>::value || !__has_construct<_Alloc, _Tp*, _Tp>::value) &&
+    is_trivially_move_constructible<_Tp>::value
+>::type>
+_LIBCPP_INLINE_VISIBILITY
+void __construct_forward_with_exception_guarantees(_Alloc&, _Tp* __begin1, _Tp* __end1, _Tp*& __begin2) {
+    ptrdiff_t _Np = __end1 - __begin1;
+    if (_Np > 0) {
+        _VSTD::memcpy(__begin2, __begin1, _Np * sizeof(_Tp));
+        __begin2 += _Np;
+    }
+}
+
+template <class _Alloc, class _Iter, class _Ptr>
+_LIBCPP_INLINE_VISIBILITY
+void __construct_range_forward(_Alloc& __a, _Iter __begin1, _Iter __end1, _Ptr& __begin2) {
+    typedef allocator_traits<_Alloc> _Traits;
+    for (; __begin1 != __end1; ++__begin1, (void) ++__begin2) {
+        _Traits::construct(__a, _VSTD::__to_address(__begin2), *__begin1);
+    }
+}
+
+template <class _Alloc, class _Source, class _Dest,
+          class _RawSource = typename remove_const<_Source>::type,
+          class _RawDest = typename remove_const<_Dest>::type,
+          class =
+    typename enable_if<
+        is_trivially_copy_constructible<_Dest>::value &&
+        is_same<_RawSource, _RawDest>::value &&
+        (__is_default_allocator<_Alloc>::value || !__has_construct<_Alloc, _Dest*, _Source&>::value)
+    >::type>
+_LIBCPP_INLINE_VISIBILITY
+void __construct_range_forward(_Alloc&, _Source* __begin1, _Source* __end1, _Dest*& __begin2) {
+    ptrdiff_t _Np = __end1 - __begin1;
+    if (_Np > 0) {
+        _VSTD::memcpy(const_cast<_RawDest*>(__begin2), __begin1, _Np * sizeof(_Dest));
+        __begin2 += _Np;
+    }
+}
+
+template <class _Alloc, class _Ptr>
+_LIBCPP_INLINE_VISIBILITY
+void __construct_backward_with_exception_guarantees(_Alloc& __a, _Ptr __begin1, _Ptr __end1, _Ptr& __end2) {
+    static_assert(__is_cpp17_move_insertable<_Alloc>::value,
+        "The specified type does not meet the requirements of Cpp17MoveInsertable");
+    typedef allocator_traits<_Alloc> _Traits;
+    while (__end1 != __begin1) {
+        _Traits::construct(__a, _VSTD::__to_address(__end2 - 1),
+#ifdef _LIBCPP_NO_EXCEPTIONS
+            _VSTD::move(*--__end1)
+#else
+            _VSTD::move_if_noexcept(*--__end1)
+#endif
+        );
+        --__end2;
+    }
+}
+
+template <class _Alloc, class _Tp, class = typename enable_if<
+    (__is_default_allocator<_Alloc>::value || !__has_construct<_Alloc, _Tp*, _Tp>::value) &&
+    is_trivially_move_constructible<_Tp>::value
+>::type>
+_LIBCPP_INLINE_VISIBILITY
+void __construct_backward_with_exception_guarantees(_Alloc&, _Tp* __begin1, _Tp* __end1, _Tp*& __end2) {
+    ptrdiff_t _Np = __end1 - __begin1;
+    __end2 -= _Np;
+    if (_Np > 0)
+        _VSTD::memcpy(static_cast<void*>(__end2), static_cast<void const*>(__begin1), _Np * sizeof(_Tp));
+}
+
 struct __destruct_n
 {
 private:
@@ -926,6 +1013,37 @@ public:
 
 _LIBCPP_FUNC_VIS void* align(size_t __align, size_t __sz, void*& __ptr, size_t& __space);
 
+// --- Helper for container swap --
+template <typename _Alloc>
+_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX11
+void __swap_allocator(_Alloc & __a1, _Alloc & __a2, true_type)
+#if _LIBCPP_STD_VER > 11
+    _NOEXCEPT
+#else
+    _NOEXCEPT_(__is_nothrow_swappable<_Alloc>::value)
+#endif
+{
+    using _VSTD::swap;
+    swap(__a1, __a2);
+}
+
+template <typename _Alloc>
+inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX11
+void __swap_allocator(_Alloc &, _Alloc &, false_type) _NOEXCEPT {}
+
+template <typename _Alloc>
+inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_AFTER_CXX11
+void __swap_allocator(_Alloc & __a1, _Alloc & __a2)
+#if _LIBCPP_STD_VER > 11
+    _NOEXCEPT
+#else
+    _NOEXCEPT_(__is_nothrow_swappable<_Alloc>::value)
+#endif
+{
+    _VSTD::__swap_allocator(__a1, __a2,
+      integral_constant<bool, allocator_traits<_Alloc>::propagate_on_container_swap::value>());
+}
+
 template <typename _Alloc, typename _Traits=allocator_traits<_Alloc> >
 struct __noexcept_move_assign_container : public integral_constant<bool,
     _Traits::propagate_on_container_move_assignment::value
diff --git a/libcxx/include/module.modulemap.in b/libcxx/include/module.modulemap.in
index e2a9dae40a5001..cbf0b4f7f16d5c 100644
--- a/libcxx/include/module.modulemap.in
+++ b/libcxx/include/module.modulemap.in
@@ -832,7 +832,6 @@ module std [system] {
       module ranges_uninitialized_algorithms { private header "__memory/ranges_uninitialized_algorithms.h" }
       module raw_storage_iterator            { private header "__memory/raw_storage_iterator.h" }
       module shared_ptr                      { private header "__memory/shared_ptr.h" }
-      module swap_allocator                  { private header "__memory/swap_allocator.h" }
       module temporary_buffer                { private header "__memory/temporary_buffer.h" }
       module uninitialized_algorithms        { private header "__memory/uninitialized_algorithms.h" }
       module unique_ptr                      { private header "__memory/unique_ptr.h" }
diff --git a/libcxx/include/string b/libcxx/include/string
index 3723dc8a393805..bb169a82c9e7d8 100644
--- a/libcxx/include/string
+++ b/libcxx/include/string
@@ -532,7 +532,6 @@ basic_string<char32_t> operator "" s( const char32_t *str, size_t len );
 #include <__iterator/reverse_iterator.h>
 #include <__iterator/wrap_iter.h>
 #include <__memory/allocate_at_least.h>
-#include <__memory/swap_allocator.h>
 #include <__string/char_traits.h>
 #include <__string/extern_template_lists.h>
 #include <__utility/auto_cast.h>
diff --git a/libcxx/include/vector b/libcxx/include/vector
index 30030f85e43c38..14f586c9bfd7ea 100644
--- a/libcxx/include/vector
+++ b/libcxx/include/vector
@@ -291,8 +291,6 @@ erase_if(vector<T, Allocator>& c, Predicate pred);    // C++20
 #include <__iterator/reverse_iterator.h>
 #include <__iterator/wrap_iter.h>
 #include <__memory/allocate_at_least.h>
-#include <__memory/pointer_traits.h>
-#include <__memory/swap_allocator.h>
 #include <__split_buffer>
 #include <__utility/forward.h>
 #include <__utility/move.h>
@@ -897,11 +895,9 @@ template <class _Tp, class _Allocator>
 void
 vector<_Tp, _Allocator>::__swap_out_circular_buffer(__split_buffer<value_type, allocator_type&>& __v)
 {
+
     __annotate_delete();
-    using _RevIter = std::reverse_iterator<pointer>;
-    __v.__begin_   = std::__uninitialized_allocator_move_if_noexcept(
-                       __alloc(), _RevIter(__end_), _RevIter(__begin_), _RevIter(__v.__begin_))
-                       .base();
+    _VSTD::__construct_backward_with_exception_guarantees(this->__alloc(), this->__begin_, this->__end_, __v.__begin_);
     _VSTD::swap(this->__begin_, __v.__begin_);
     _VSTD::swap(this->__end_, __v.__end_);
     _VSTD::swap(this->__end_cap(), __v.__end_cap());
@@ -916,11 +912,8 @@ vector<_Tp, _Allocator>::__swap_out_circular_buffer(__split_buffer<value_type, a
 {
     __annotate_delete();
     pointer __r = __v.__begin_;
-    using _RevIter = std::reverse_iterator<pointer>;
-    __v.__begin_   = std::__uninitialized_allocator_move_if_noexcept(
-                       __alloc(), _RevIter(__p), _RevIter(__begin_), _RevIter(__v.__begin_))
-                       .base();
-    __v.__end_ = std::__uninitialized_allocator_move_if_noexcept(__alloc(), __p, __end_, __v.__end_);
+    _VSTD::__construct_backward_with_exception_guarantees(this->__alloc(), this->__begin_, __p, __v.__begin_);
+    _VSTD::__construct_forward_with_exception_guarantees(this->__alloc(), __p, this->__end_, __v.__end_);
     _VSTD::swap(this->__begin_, __v.__begin_);
     _VSTD::swap(this->__end_, __v.__end_);
     _VSTD::swap(this->__end_cap(), __v.__end_cap());
@@ -1008,8 +1001,8 @@ typename enable_if
 >::type
 vector<_Tp, _Allocator>::__construct_at_end(_ForwardIterator __first, _ForwardIterator __last, size_type __n)
 {
-  _ConstructTransaction __tx(*this, __n);
-  __tx.__pos_ = std::__uninitialized_allocator_copy(__alloc(), __first, __last, __tx.__pos_);
+    _ConstructTransaction __tx(*this, __n);
+    _VSTD::__construct_range_forward(this->__alloc(), __first, __last, __tx.__pos_);
 }
 
 //  Default constructs __n objects starting at __end_
diff --git a/libcxx/test/libcxx/containers/sequences/vector/asan_throw.pass.cpp b/libcxx/test/libcxx/containers/sequences/vector/asan_throw.pass.cpp
index 6a267e546f927c..71d4f33366f33d 100644
--- a/libcxx/test/libcxx/containers/sequences/vector/asan_throw.pass.cpp
+++ b/libcxx/test/libcxx/containers/sequences/vector/asan_throw.pass.cpp
@@ -99,9 +99,9 @@ void test_insert_range() {
     v.insert(v.end(), a, a + 2);
     assert(0);
   } catch (int e) {
-    assert(v.size() == 2);
+    assert(v.size() == 3);
   }
-  assert(v.size() == 2);
+  assert(v.size() == 3);
   assert(is_contiguous_container_asan_correct(v));
 }
 
diff --git a/libcxx/test/libcxx/memory/uninitialized_allocator_copy.pass.cpp b/libcxx/test/libcxx/memory/uninitialized_allocator_copy.pass.cpp
deleted file mode 100644
index 928d2ed0fe3e10..00000000000000
--- a/libcxx/test/libcxx/memory/uninitialized_allocator_copy.pass.cpp
+++ /dev/null
@@ -1,66 +0,0 @@
-//===----------------------------------------------------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-// UNSUPPORTED: no-exceptions
-
-// ensure that __uninitialized_allocator_copy calls the proper construct and destruct functions
-
-#include <algorithm>
-#include <memory>
-
-#include "test_allocator.h"
-
-template <class T>
-class construct_counting_allocator {
-public:
-  using value_type = T;
-
-  int* constructed_count_;
-  int* max_constructed_count_;
-
-  construct_counting_allocator(int* constructed_count, int* max_constructed_count)
-      : constructed_count_(constructed_count), max_constructed_count_(max_constructed_count) {}
-
-  template <class... Args>
-  void construct(T* ptr, Args&&... args) {
-    ::new (static_cast<void*>(ptr)) T(args...);
-    ++*constructed_count_;
-    *max_constructed_count_ = std::max(*max_constructed_count_, *constructed_count_);
-  }
-
-  void destroy(T* ptr) {
-    --*constructed_count_;
-    ptr->~T();
-  }
-};
-
-int throw_if_zero = 15;
-
-struct ThrowSometimes {
-  ThrowSometimes() = default;
-  ThrowSometimes(const ThrowSometimes&) {
-    if (--throw_if_zero == 0)
-      throw 1;
-  }
-};
-
-int main(int, char**) {
-  int constructed_count     = 0;
-  int max_constructed_count = 0;
-  construct_counting_allocator<ThrowSometimes> alloc(&constructed_count, &max_constructed_count);
-  ThrowSometimes in[20];
-  TEST_ALIGNAS_TYPE(ThrowSometimes) char out[sizeof(ThrowSometimes) * 20];
-  try {
-    std::__uninitialized_allocator_copy(
-        alloc, std::begin(in), std::end(in), reinterpret_cast<ThrowSometimes*>(std::begin(out)));
-  } catch (...) {
-  }
-
-  assert(constructed_count == 0);
-  assert(max_constructed_count == 14);
-}
diff --git a/libcxx/test/libcxx/private_headers.verify.cpp b/libcxx/test/libcxx/private_headers.verify.cpp
index 0671cbf2399ce2..6c1b3b5e7bbfd9 100644
--- a/libcxx/test/libcxx/private_headers.verify.cpp
+++ b/libcxx/test/libcxx/private_headers.verify.cpp
@@ -415,7 +415,6 @@ END-SCRIPT
 #include <__memory/ranges_uninitialized_algorithms.h> // expected-error@*:* {{use of private header from outside its module: '__memory/ranges_uninitialized_algorithms.h'}}
 #include <__memory/raw_storage_iterator.h> // expected-error@*:* {{use of private header from outside its module: '__memory/raw_storage_iterator.h'}}
 #include <__memory/shared_ptr.h> // expected-error@*:* {{use of private header from outside its module: '__memory/shared_ptr.h'}}
-#include <__memory/swap_allocator.h> // expected-error@*:* {{use of private header from outside its module: '__memory/swap_allocator.h'}}
 #include <__memory/temporary_buffer.h> // expected-error@*:* {{use of private header from outside its module: '__memory/temporary_buffer.h'}}
 #include <__memory/uninitialized_algorithms.h> // expected-error@*:* {{use of private header from outside its module: '__memory/uninitialized_algorithms.h'}}
 #include <__memory/unique_ptr.h> // expected-error@*:* {{use of private header from outside its module: '__memory/unique_ptr.h'}}
diff --git a/libcxx/test/std/containers/sequences/vector/vector.modifiers/insert_iter_initializer_list.pass.cpp b/libcxx/test/std/containers/sequences/vector/vector.modifiers/insert_iter_initializer_list.pass.cpp
index 4a81fbfed65e7a..eef63795619948 100644
--- a/libcxx/test/std/containers/sequences/vector/vector.modifiers/insert_iter_initializer_list.pass.cpp
+++ b/libcxx/test/std/containers/sequences/vector/vector.modifiers/insert_iter_initializer_list.pass.cpp
@@ -19,46 +19,9 @@
 #include "min_allocator.h"
 #include "asan_testing.h"
 
-#ifndef TEST_HAS_NO_EXCEPTIONS
-int throw_if_zero     = 2;
-int constructed_count = 0;
-
-struct ThrowSometimes {
-  ThrowSometimes() { ++constructed_count; }
-  ThrowSometimes(const ThrowSometimes&) {
-    if (--throw_if_zero == 0)
-      throw 1;
-    ++constructed_count;
-  }
-  ThrowSometimes& operator=(const ThrowSometimes&) {
-    if (--throw_if_zero == 0)
-      throw 1;
-    ++constructed_count;
-    return *this;
-  }
-  ~ThrowSometimes() { --constructed_count; }
-};
-
-void test_throwing() {
-  std::vector<ThrowSometimes> v;
-  v.reserve(4);
-  v.emplace_back();
-  v.emplace_back();
-  try {
-    v.insert(v.end(), {ThrowSometimes{}, ThrowSometimes{}});
-    assert(false);
-  } catch (int) {
-    assert(v.size() == 2);
-    assert(constructed_count == 2);
-  }
-}
-#endif // TEST_HAS_NO_EXCEPTIONS
-
-int main(int, char**) {
-#ifndef TEST_HAS_NO_EXCEPTIONS
-  test_throwing();
-#endif
-  {
+int main(int, char**)
+{
+    {
     std::vector<int> d(10, 1);
     std::vector<int>::iterator i = d.insert(d.cbegin() + 2, {3, 4, 5, 6});
     assert(d.size() == 14);
@@ -78,8 +41,8 @@ int main(int, char**) {
     assert(d[11] == 1);
     assert(d[12] == 1);
     assert(d[13] == 1);
-  }
-  {
+    }
+    {
     std::vector<int, min_allocator<int>> d(10, 1);
     std::vector<int, min_allocator<int>>::iterator i = d.insert(d.cbegin() + 2, {3, 4, 5, 6});
     assert(d.size() == 14);
@@ -99,7 +62,7 @@ int main(int, char**) {
     assert(d[11] == 1);
     assert(d[12] == 1);
     assert(d[13] == 1);
-  }
+    }
 
   return 0;
 }