Update libcxx to 02 June 2023 185b81e034ba60081023b6e59504dfffb560f3e3 (llvmorg-16.0.5)

:warning:  Для всех проектов и мимо проходящим коллегам :warning:

Если по каким-то причинам ваши тесты подломались, пожалуйста, переканонизируйте их сами. По статистике там просто поменялся порядок в канонизации.
Если изменения действительно серьезные -- приходите в [DEVTOOLSSUPPORT](https://st.yandex-team.ru/createTicket?queue=DEVTOOLSSUPPORT) / пишите в телеграм / призывайте в тикеты, будем разбираться.

```
Changes:
    [libc++] Don't try to provide source_location on AppleClang 1403
    [release/16.x][libc++] Revert the bitset sort optimization
    [libc++] Avoid ODR violations in __exception_guard
    [libc++][ranges] Fix incorrect integer typedef in `elements_view` test.
    [libc++][format] Fix a missing include in tests.
    [libc++][format] Fixes invalid usage of m type.
    [libc++][format] Fix floating point formatting.
    [libc++] Fix ranges::binary_search() returning true for cases where the element is not in the range
    [libc++] Temporarily not use compiler intrinsics for some type traits in Objective-C++ mode.
    [libc++][ranges] move all range iterators back in class
    [libcxx][ranges] revert join_view::iterator and sentinel to be in-class
    [libc++] Add FTM for views::as_rvalue
    [libc++] Fix bug in allocate_shared_for_overwrite
    [libc++] fix `shared_ptr`'s incorrect constraints
    [libc++] In tests, use `abort` to terminate upon an error.
    [libc++] Guard the fix to CityHash behind ABI v2
    [libc++][format] Fixes constexpr validation.
    [libc++] Remove use of internal glibc macros to determine if c8rtomb() and mbrtoc8() are present.
    [libc++] Fixes the Clang modular build.
    [libc++][ranges] Temporarily mark `ranges::join_view` as experimental.
    libcxx: Don't apply ABI tags to extern "C" fns
    [libc++] Introduce a compile-time mechanism to override __libcpp_verbose_abort
    [libc++][format] Fixes usage of contiguous ranges.
    [libc++][doc] Updates format status.
    [libc++][ranges] implement `std::ranges::split_view`
    [libc++] implement P1020R1 P1973R1 make_unique[shared]_for_overwrite
    [libc++] Improve binary size when using __transaction
    [libc++] Rename take_while_view::__sentinel to __take_while_view_sentinel
    [libc++] Granularize <type_traits> includes in <bit>, <numbers> and <coroutine>
    [libc++] Implement P1413R3 (Deprecate std::aligned_storage and std::aligned_union)
    [libc++] Add FreeBSD XFAILs in preparation for CI
    [libc++] add FreeBSD atomic wait support
    [libc++][format] range-default-formatter for set.
    [libc++] Move iota_view::iterator and sentinel out of iota_view
    [libc++] Enable clang-tidy from the buildkite pipeline instead of hard-coding it in run-buildbot
    [libc++] Enable segmented iterator optimizations for join_view::iterator
    [libc++] Mark LWG3349 as complete
    [libc++] Remove old CI configurations and update the supported compiler versions
    [libc++] Implement P2446R2 (views::as_rvalue)
    [libc++][format] range-default-formatter for map
    [libc++][format] Adds formatter std::vector<bool>.
    [libc++][format] Adds container adaptor formatters.
    [libc++][format] Implements range_formatter
    [libc++][format] Adds new test macros.
    [libc++][ranges] Remove a leftover include version control markers in Cxx20Papers.csv
    [libc++][ranges] Mark completed Ranges papers and issues as done, bump version macro
    [libc++] Add ALLOW_RETRIES to a few flaky tests
    [SystemZ][z/OS] Fix cityhash lit for EBCDIC
    [libc++] Mark std::pmr virtual functions as _LIBCPP_HIDE_FROM_ABI_VIRTUAL
    [libc++] Remove <type_traits> includes from <atomic> and <ratio>
    [libcxx] Add missing includes
    [libc++] allow redefined macro in non_trivial_copy_move_ABI test
    [libc++][ranges] implement `std::views::elements_view`
    [libc++] Add [[clang::lifetimebound]] attribute to std::forward and friends
    Reapply "[libc++][ranges]Refactor `copy{,_backward}` and `move{,_backward}`"
    [libc++] Add clang-tidy to the list of possible substitutions for %{clang-tidy}
    [libc++] Add missing includes in move_iterator.h
    [libc++] Make pmr::monotonic_buffer_resource bump down
    [libc++] Add [[nodiscard]] extensions in <math.h>
    [libc++] Fix ranges::uninitialized_move{, _n} for move-only types
    [libc++][ranges] Fix incorrect integer type in `view_interface` tests.
    [libc++] Hold mutex lock while notify_all is called at notify_all_at_thread_exit
    [Libcxx] Add <source_location> header.
    [libc++] Rename transform_view::{__iterator, __sentinel} to __transform_view_{iterator, sentinel}
    [libc++] Add FreeBSD exceptions.nonew ABI list
    [libc++][format] Fixes escaping string literals.
    [libc++] Use _LIBCPP_HIDE_FROM_ABI_VIRTUAL instead of _LIBCPP_INLINE_VISIBILITY attribute on virtual function
    [libc++][test] Move `common_input_iterator` to `test_iterators.h`
    [libc++][utils] Remove unused import in `run.py`
    [libc++] Remove warning for `LIBCXX_SYSROOT`, `LIBCXX_TARGET_TRIPLE`, and `LIBCXX_GCC_TOOLCHAIN`
    [libc++] Fix aligned_alloc usage for Android
    [libc++] Use %{clang-query} when calling clang-query
    [libc++] Add missing include in __format/unicode.h
    [libc++] Remove HIDE_FROM_ABI from virtual functions
    [libc++] Fix transitive includes list for C++23
    [libc++] Add _LIBCPP_HIDE_FROM_ABI to __constexpr_logb and __constexpr_scalbn
    [libc++] Granularize <bit> and remove <__bits>
    [libc++] [C++20] [P0415] Constexpr for std::complex.
    libc++: bring back the unsigned in the return type in wcstoull_l
    [libc++][CI] Improves clang-(tidy|query) selection.
    [libc++] Granularize <type_traits> includes in <iterator>
    [libc++] Implement constexpr {isfinite, isinf, isnan, isnormal}
    [libc++][chrono] Add calendar type formatters.
    [libc++] LWG3738 Validates a missing precondition.
    [libc++] LWG3745 noexcept for atomic_wait.
    [libc++] Granularize <type_traits> includes in <compare>
    std::sort: add BlockQuickSort partitioning algorithm for arithmetic types
    [libc++] Granularize <type_traits> includes in <utility>
    [libc++][format] Removes test redundancy.
    [libc++][format] Adds formatter for tuple and pair
    [libc++] Use aligned_alloc instead of posix_memalign for C++17
    [libc++] Rename __tuple to __tuple_dir to avoid file collision
    [libc++] Add FreeBSD ABI list
    [libc++] Adds __cpp_lib_constexpr_algorithms to utility.
    [libc++] Granularize <type_traits> includes in <concepts
    [libc++][format] Renames __null_sentinel.
    Implementstd::ranges::view_interface::size returns a signed type
    [libc++] Implement P1169R4 (static operator())
    [libc++] Implement `std::expected` P0323R12
    [libc++][Android] Disable pbump2gig for Android
    [libc++][Android] Android/Bionic headers don't work with modules yet
    [libc++][math.h] Add double overloads
    [libc++] Move filter_view::iterator and sentinel out of filter_view
    [libc++] Implement P0339R6 (polymorphic_allocator<> as a vocabulary type)
    [libc++][format] Adds range-default-formatter.
    [libc++][Android] Rename user NS to User to avoid conflict with struct
    [libc++] Fix memory leaks when throwing inside std::vector constructors
```

1 files changed, 112 insertions, 31 deletions

diff --git a/contrib/libs/cxxsupp/libcxx/include/__algorithm/copy_backward.h b/contrib/libs/cxxsupp/libcxx/include/__algorithm/copy_backward.h
index 1db4f1e2d53..bb2a4328781 100644
--- a/contrib/libs/cxxsupp/libcxx/include/__algorithm/copy_backward.h
+++ b/contrib/libs/cxxsupp/libcxx/include/__algorithm/copy_backward.h
@@ -9,54 +9,135 @@
 #ifndef _LIBCPP___ALGORITHM_COPY_BACKWARD_H
 #define _LIBCPP___ALGORITHM_COPY_BACKWARD_H
 
-#include <__algorithm/copy.h>
+#include <__algorithm/copy_move_common.h>
 #include <__algorithm/iterator_operations.h>
-#include <__algorithm/ranges_copy.h>
-#include <__algorithm/unwrap_iter.h>
-#include <__concepts/same_as.h>
+#include <__algorithm/min.h>
 #include <__config>
-#include <__iterator/iterator_traits.h>
-#include <__iterator/reverse_iterator.h>
-#include <__ranges/subrange.h>
+#include <__iterator/segmented_iterator.h>
+#include <__type_traits/common_type.h>
+#include <__type_traits/is_copy_constructible.h>
 #include <__utility/move.h>
 #include <__utility/pair.h>
-#include <cstring>
-#include <type_traits>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header
 #endif
 
+_LIBCPP_PUSH_MACROS
+#include <__undef_macros>
+
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-template <class _AlgPolicy, class _InputIterator, class _OutputIterator,
-          __enable_if_t<is_same<_AlgPolicy, _ClassicAlgPolicy>::value, int> = 0>
-inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 pair<_InputIterator, _OutputIterator>
-__copy_backward(_InputIterator __first, _InputIterator __last, _OutputIterator __result) {
-  auto __ret = std::__copy(
-      __unconstrained_reverse_iterator<_InputIterator>(__last),
-      __unconstrained_reverse_iterator<_InputIterator>(__first),
-      __unconstrained_reverse_iterator<_OutputIterator>(__result));
-  return pair<_InputIterator, _OutputIterator>(__ret.first.base(), __ret.second.base());
-}
+template <class _AlgPolicy, class _InIter, class _Sent, class _OutIter>
+_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 {
+  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 {
+    auto __last_iter          = _IterOps<_AlgPolicy>::next(__first, __last);
+    auto __original_last_iter = __last_iter;
+
+    while (__first != __last_iter) {
+      *--__result = *--__last_iter;
+    }
+
+    return std::make_pair(std::move(__original_last_iter), std::move(__result));
+  }
+
+  template <class _InIter, class _OutIter, __enable_if_t<__is_segmented_iterator<_InIter>::value, int> = 0>
+  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 pair<_InIter, _OutIter>
+  operator()(_InIter __first, _InIter __last, _OutIter __result) const {
+    using _Traits = __segmented_iterator_traits<_InIter>;
+    auto __sfirst = _Traits::__segment(__first);
+    auto __slast  = _Traits::__segment(__last);
+    if (__sfirst == __slast) {
+      auto __iters =
+          std::__copy_backward<_AlgPolicy>(_Traits::__local(__first), _Traits::__local(__last), std::move(__result));
+      return std::make_pair(__last, __iters.second);
+    }
+
+    __result =
+        std::__copy_backward<_AlgPolicy>(_Traits::__begin(__slast), _Traits::__local(__last), std::move(__result))
+            .second;
+    --__slast;
+    while (__sfirst != __slast) {
+      __result =
+          std::__copy_backward<_AlgPolicy>(_Traits::__begin(__slast), _Traits::__end(__slast), std::move(__result))
+              .second;
+      --__slast;
+    }
+    __result = std::__copy_backward<_AlgPolicy>(_Traits::__local(__first), _Traits::__end(__slast), std::move(__result))
+                   .second;
+    return std::make_pair(__last, std::move(__result));
+  }
+
+  template <class _InIter,
+            class _OutIter,
+            __enable_if_t<__is_cpp17_random_access_iterator<_InIter>::value &&
+                              !__is_segmented_iterator<_InIter>::value && __is_segmented_iterator<_OutIter>::value,
+                          int> = 0>
+  _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 pair<_InIter, _OutIter>
+  operator()(_InIter __first, _InIter __last, _OutIter __result) {
+    using _Traits           = __segmented_iterator_traits<_OutIter>;
+    auto __orig_last        = __last;
+    auto __segment_iterator = _Traits::__segment(__result);
 
-#if _LIBCPP_STD_VER > 17
-template <class _AlgPolicy, class _Iter1, class _Sent1, class _Iter2,
-          __enable_if_t<is_same<_AlgPolicy, _RangeAlgPolicy>::value, int> = 0>
-_LIBCPP_HIDE_FROM_ABI constexpr pair<_Iter1, _Iter2> __copy_backward(_Iter1 __first, _Sent1 __last, _Iter2 __result) {
-  auto __last_iter     = _IterOps<_AlgPolicy>::next(__first, std::move(__last));
-  auto __reverse_range = std::__reverse_range(std::ranges::subrange(std::move(__first), __last_iter));
-  auto __ret           = ranges::copy(std::move(__reverse_range), std::make_reverse_iterator(__result));
-  return std::make_pair(__last_iter, __ret.out.base());
+    // When the range contains no elements, __result might not be a valid iterator
+    if (__first == __last)
+      return std::make_pair(__first, __result);
+
+    auto __local_last = _Traits::__local(__result);
+    while (true) {
+      using _DiffT = typename common_type<__iter_diff_t<_InIter>, __iter_diff_t<_OutIter> >::type;
+
+      auto __local_first = _Traits::__begin(__segment_iterator);
+      auto __size        = std::min<_DiffT>(__local_last - __local_first, __last - __first);
+      auto __iter        = std::__copy_backward<_AlgPolicy>(__last - __size, __last, __local_last).second;
+      __last -= __size;
+
+      if (__first == __last)
+        return std::make_pair(std::move(__orig_last), _Traits::__compose(__segment_iterator, std::move(__iter)));
+      --__segment_iterator;
+      __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*>
+  operator()(_In* __first, _In* __last, _Out* __result) const {
+    return std::__copy_backward_trivial_impl(__first, __last, __result);
+  }
+};
+
+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>(
+      std::move(__first), std::move(__last), std::move(__result));
 }
-#endif // _LIBCPP_STD_VER > 17
 
 template <class _BidirectionalIterator1, class _BidirectionalIterator2>
-inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _BidirectionalIterator2
-copy_backward(_BidirectionalIterator1 __first, _BidirectionalIterator1 __last, _BidirectionalIterator2 __result) {
-  return std::__copy_backward<_ClassicAlgPolicy>(__first, __last, __result).second;
+inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20
+_BidirectionalIterator2
+copy_backward(_BidirectionalIterator1 __first, _BidirectionalIterator1 __last,
+              _BidirectionalIterator2 __result)
+{
+  static_assert(std::is_copy_constructible<_BidirectionalIterator1>::value &&
+                std::is_copy_constructible<_BidirectionalIterator1>::value, "Iterators must be copy constructible.");
+
+  return std::__copy_backward<_ClassicAlgPolicy>(
+      std::move(__first), std::move(__last), std::move(__result)).second;
 }
 
 _LIBCPP_END_NAMESPACE_STD
 
+_LIBCPP_POP_MACROS
+
 #endif // _LIBCPP___ALGORITHM_COPY_BACKWARD_H