[libcxx-commits] [libcxx] 5eb5548 - Revert "[libcxx] shared_ptr changes from library fundamentals (P0414R2)."

via libcxx-commits libcxx-commits at lists.llvm.org
Mon May 11 22:43:28 PDT 2020


Author: zoecarver
Date: 2020-05-11T22:43:17-07:00
New Revision: 5eb55483ebd183985e6f397491ac822304e3a893

URL: https://github.com/llvm/llvm-project/commit/5eb55483ebd183985e6f397491ac822304e3a893
DIFF: https://github.com/llvm/llvm-project/commit/5eb55483ebd183985e6f397491ac822304e3a893.diff

LOG: Revert "[libcxx] shared_ptr changes from library fundamentals (P0414R2)."

This reverts commit e8c13c182a562f45287d6b8da612264d09027087.

Added: 
    

Modified: 
    libcxx/include/memory
    libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/types.pass.cpp
    libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.cast/const_pointer_cast.pass.cpp
    libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.cast/dynamic_pointer_cast.pass.cpp
    libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.cast/static_pointer_cast.pass.cpp
    libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/default.pass.cpp
    libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer.pass.cpp
    libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/shared_ptr_pointer.pass.cpp
    libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/unique_ptr.pass.cpp
    libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.create/make_shared.protected.fail.cpp
    libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.obs/op_bool.pass.cpp
    libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.weak/util.smartptr.weak.assign/shared_ptr_Y.pass.cpp
    libcxx/www/cxx1z_status.html

Removed: 
    libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.cast/reinterpret_pointer_cast.pass.cpp
    libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/shared_ptr_copy_move.fail.cpp
    libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.obs/op_arrow.fail.cpp
    libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.obs/op_bracket.fail.cpp
    libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.obs/op_bracket.pass.cpp


################################################################################
diff  --git a/libcxx/include/memory b/libcxx/include/memory
index 49627147b061..29c5e98b3b7c 100644
--- a/libcxx/include/memory
+++ b/libcxx/include/memory
@@ -3702,25 +3702,15 @@ public:
 
 template<class _Tp> class _LIBCPP_TEMPLATE_VIS enable_shared_from_this;
 
-template<class _Tp, class _Up>
-struct __compatible_with
-#if _LIBCPP_STD_VER > 14
-    : is_convertible<remove_extent_t<_Tp>*, remove_extent_t<_Up>*> {};
-#else
-    : is_convertible<_Tp*, _Up*> {};
-#endif // _LIBCPP_STD_VER > 14
-
 template<class _Tp>
 class _LIBCPP_TEMPLATE_VIS shared_ptr
 {
 public:
+    typedef _Tp element_type;
+
 #if _LIBCPP_STD_VER > 14
     typedef weak_ptr<_Tp> weak_type;
-    typedef remove_extent_t<_Tp> element_type;
-#else
-    typedef _Tp element_type;
 #endif
-
 private:
     element_type*      __ptr_;
     __shared_weak_count* __cntrl_;
@@ -3733,13 +3723,13 @@ public:
     _LIBCPP_CONSTEXPR shared_ptr(nullptr_t) _NOEXCEPT;
     template<class _Yp>
         explicit shared_ptr(_Yp* __p,
-                            typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type = __nat());
+                            typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat());
     template<class _Yp, class _Dp>
         shared_ptr(_Yp* __p, _Dp __d,
-                   typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type = __nat());
+                   typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat());
     template<class _Yp, class _Dp, class _Alloc>
         shared_ptr(_Yp* __p, _Dp __d, _Alloc __a,
-                   typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type = __nat());
+                   typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat());
     template <class _Dp> shared_ptr(nullptr_t __p, _Dp __d);
     template <class _Dp, class _Alloc> shared_ptr(nullptr_t __p, _Dp __d, _Alloc __a);
     template<class _Yp> _LIBCPP_INLINE_VISIBILITY shared_ptr(const shared_ptr<_Yp>& __r, element_type* __p) _NOEXCEPT;
@@ -3748,13 +3738,13 @@ public:
     template<class _Yp>
         _LIBCPP_INLINE_VISIBILITY
         shared_ptr(const shared_ptr<_Yp>& __r,
-                   typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type = __nat())
+                   typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat())
                        _NOEXCEPT;
 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     _LIBCPP_INLINE_VISIBILITY
     shared_ptr(shared_ptr&& __r) _NOEXCEPT;
     template<class _Yp> _LIBCPP_INLINE_VISIBILITY  shared_ptr(shared_ptr<_Yp>&& __r,
-                   typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type = __nat())
+                   typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat())
                        _NOEXCEPT;
 #endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
     template<class _Yp> explicit shared_ptr(const weak_ptr<_Yp>& __r,
@@ -3817,7 +3807,7 @@ public:
     template<class _Yp>
         typename enable_if
         <
-            __compatible_with<_Yp, element_type>::value,
+            is_convertible<_Yp*, element_type*>::value,
             shared_ptr&
         >::type
         _LIBCPP_INLINE_VISIBILITY
@@ -3828,8 +3818,8 @@ public:
     template<class _Yp>
         typename enable_if
         <
-            __compatible_with<_Yp, element_type>::value,
-            shared_ptr&
+            is_convertible<_Yp*, element_type*>::value,
+            shared_ptr<_Tp>&
         >::type
         _LIBCPP_INLINE_VISIBILITY
         operator=(shared_ptr<_Yp>&& __r);
@@ -3879,7 +3869,7 @@ public:
     template<class _Yp>
         typename enable_if
         <
-            __compatible_with<_Yp, element_type>::value,
+            is_convertible<_Yp*, element_type*>::value,
             void
         >::type
         _LIBCPP_INLINE_VISIBILITY
@@ -3887,7 +3877,7 @@ public:
     template<class _Yp, class _Dp>
         typename enable_if
         <
-            __compatible_with<_Yp, element_type>::value,
+            is_convertible<_Yp*, element_type*>::value,
             void
         >::type
         _LIBCPP_INLINE_VISIBILITY
@@ -3895,7 +3885,7 @@ public:
     template<class _Yp, class _Dp, class _Alloc>
         typename enable_if
         <
-            __compatible_with<_Yp, element_type>::value,
+            is_convertible<_Yp*, element_type*>::value,
             void
         >::type
         _LIBCPP_INLINE_VISIBILITY
@@ -3907,12 +3897,7 @@ public:
     typename add_lvalue_reference<element_type>::type operator*() const _NOEXCEPT
         {return *__ptr_;}
     _LIBCPP_INLINE_VISIBILITY
-    element_type* operator->() const _NOEXCEPT
-    {
-        static_assert(!_VSTD::is_array<_Tp>::value,
-                      "std::shared_ptr<T>::operator-> is only valid when T is not an array type.");
-        return __ptr_;
-    }
+    element_type* operator->() const _NOEXCEPT {return __ptr_;}
     _LIBCPP_INLINE_VISIBILITY
     long use_count() const _NOEXCEPT {return __cntrl_ ? __cntrl_->use_count() : 0;}
     _LIBCPP_INLINE_VISIBILITY
@@ -3932,17 +3917,6 @@ public:
     __owner_equivalent(const shared_ptr& __p) const
         {return __cntrl_ == __p.__cntrl_;}
 
-#if _LIBCPP_STD_VER > 14
-    typename add_lvalue_reference<element_type>::type
-    _LIBCPP_INLINE_VISIBILITY
-    operator[](ptr
diff _t __i) const
-    {
-            static_assert(_VSTD::is_array<_Tp>::value,
-                          "std::shared_ptr<T>::operator[] is only valid when T is an array type.");
-            return __ptr_[__i];
-    }
-#endif
-
 #ifndef _LIBCPP_NO_RTTI
     template <class _Dp>
         _LIBCPP_INLINE_VISIBILITY
@@ -3995,18 +3969,6 @@ private:
 
     _LIBCPP_INLINE_VISIBILITY void __enable_weak_this(...) _NOEXCEPT {}
 
-    template <class, class _Yp>
-        struct __shared_ptr_default_delete
-            : default_delete<_Yp> {};
-
-    template <class _Yp, class _Un, size_t _Sz>
-        struct __shared_ptr_default_delete<_Yp[_Sz], _Un>
-            : default_delete<_Yp[]> {};
-
-    template <class _Yp, class _Un>
-        struct __shared_ptr_default_delete<_Yp[], _Un>
-            : default_delete<_Yp[]> {};
-
     template <class _Up> friend class _LIBCPP_TEMPLATE_VIS shared_ptr;
     template <class _Up> friend class _LIBCPP_TEMPLATE_VIS weak_ptr;
 };
@@ -4039,13 +4001,13 @@ shared_ptr<_Tp>::shared_ptr(nullptr_t) _NOEXCEPT
 template<class _Tp>
 template<class _Yp>
 shared_ptr<_Tp>::shared_ptr(_Yp* __p,
-                            typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type)
+                            typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type)
     : __ptr_(__p)
 {
     unique_ptr<_Yp> __hold(__p);
     typedef typename __shared_ptr_default_allocator<_Yp>::type _AllocT;
-    typedef __shared_ptr_pointer<_Yp*, __shared_ptr_default_delete<_Tp, _Yp>, _AllocT > _CntrlBlk;
-    __cntrl_ = new _CntrlBlk(__p, __shared_ptr_default_delete<_Tp, _Yp>(), _AllocT());
+    typedef __shared_ptr_pointer<_Yp*, default_delete<_Yp>, _AllocT > _CntrlBlk;
+    __cntrl_ = new _CntrlBlk(__p, default_delete<_Yp>(), _AllocT());
     __hold.release();
     __enable_weak_this(__p, __p);
 }
@@ -4053,7 +4015,7 @@ shared_ptr<_Tp>::shared_ptr(_Yp* __p,
 template<class _Tp>
 template<class _Yp, class _Dp>
 shared_ptr<_Tp>::shared_ptr(_Yp* __p, _Dp __d,
-                            typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type)
+                            typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type)
     : __ptr_(__p)
 {
 #ifndef _LIBCPP_NO_EXCEPTIONS
@@ -4099,7 +4061,7 @@ shared_ptr<_Tp>::shared_ptr(nullptr_t __p, _Dp __d)
 template<class _Tp>
 template<class _Yp, class _Dp, class _Alloc>
 shared_ptr<_Tp>::shared_ptr(_Yp* __p, _Dp __d, _Alloc __a,
-                            typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type)
+                            typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type)
     : __ptr_(__p)
 {
 #ifndef _LIBCPP_NO_EXCEPTIONS
@@ -4177,7 +4139,7 @@ template<class _Tp>
 template<class _Yp>
 inline
 shared_ptr<_Tp>::shared_ptr(const shared_ptr<_Yp>& __r,
-                            typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type)
+                            typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type)
          _NOEXCEPT
     : __ptr_(__r.__ptr_),
       __cntrl_(__r.__cntrl_)
@@ -4202,7 +4164,7 @@ template<class _Tp>
 template<class _Yp>
 inline
 shared_ptr<_Tp>::shared_ptr(shared_ptr<_Yp>&& __r,
-                            typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type)
+                            typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type)
          _NOEXCEPT
     : __ptr_(__r.__ptr_),
       __cntrl_(__r.__cntrl_)
@@ -4314,7 +4276,7 @@ template<class _Yp>
 inline
 typename enable_if
 <
-    __compatible_with<_Yp, typename shared_ptr<_Tp>::element_type>::value,
+    is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value,
     shared_ptr<_Tp>&
 >::type
 shared_ptr<_Tp>::operator=(const shared_ptr<_Yp>& __r) _NOEXCEPT
@@ -4339,7 +4301,7 @@ template<class _Yp>
 inline
 typename enable_if
 <
-    __compatible_with<_Yp, typename shared_ptr<_Tp>::element_type>::value,
+    is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value,
     shared_ptr<_Tp>&
 >::type
 shared_ptr<_Tp>::operator=(shared_ptr<_Yp>&& __r)
@@ -4440,7 +4402,7 @@ template<class _Yp>
 inline
 typename enable_if
 <
-    __compatible_with<_Yp, typename shared_ptr<_Tp>::element_type>::value,
+    is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value,
     void
 >::type
 shared_ptr<_Tp>::reset(_Yp* __p)
@@ -4453,7 +4415,7 @@ template<class _Yp, class _Dp>
 inline
 typename enable_if
 <
-    __compatible_with<_Yp, typename shared_ptr<_Tp>::element_type>::value,
+    is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value,
     void
 >::type
 shared_ptr<_Tp>::reset(_Yp* __p, _Dp __d)
@@ -4466,7 +4428,7 @@ template<class _Yp, class _Dp, class _Alloc>
 inline
 typename enable_if
 <
-    __compatible_with<_Yp, typename shared_ptr<_Tp>::element_type>::value,
+    is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value,
     void
 >::type
 shared_ptr<_Tp>::reset(_Yp* __p, _Dp __d, _Alloc __a)
@@ -4680,41 +4642,41 @@ swap(shared_ptr<_Tp>& __x, shared_ptr<_Tp>& __y) _NOEXCEPT
 
 template<class _Tp, class _Up>
 inline _LIBCPP_INLINE_VISIBILITY
-shared_ptr<_Tp>
+typename enable_if
+<
+    !is_array<_Tp>::value && !is_array<_Up>::value,
+    shared_ptr<_Tp>
+>::type
 static_pointer_cast(const shared_ptr<_Up>& __r) _NOEXCEPT
 {
-    return shared_ptr<_Tp>(__r,
-                           static_cast<
-                               typename shared_ptr<_Tp>::element_type*>(__r.get()));
+    return shared_ptr<_Tp>(__r, static_cast<_Tp*>(__r.get()));
 }
 
 template<class _Tp, class _Up>
 inline _LIBCPP_INLINE_VISIBILITY
-shared_ptr<_Tp>
+typename enable_if
+<
+    !is_array<_Tp>::value && !is_array<_Up>::value,
+    shared_ptr<_Tp>
+>::type
 dynamic_pointer_cast(const shared_ptr<_Up>& __r) _NOEXCEPT
 {
-    typedef typename shared_ptr<_Tp>::element_type _ET;
-    _ET* __p = dynamic_cast<_ET*>(__r.get());
+    _Tp* __p = dynamic_cast<_Tp*>(__r.get());
     return __p ? shared_ptr<_Tp>(__r, __p) : shared_ptr<_Tp>();
 }
 
 template<class _Tp, class _Up>
-shared_ptr<_Tp>
+typename enable_if
+<
+    is_array<_Tp>::value == is_array<_Up>::value,
+    shared_ptr<_Tp>
+>::type
 const_pointer_cast(const shared_ptr<_Up>& __r) _NOEXCEPT
 {
-    typedef typename shared_ptr<_Tp>::element_type _RTp;
+    typedef typename remove_extent<_Tp>::type _RTp;
     return shared_ptr<_Tp>(__r, const_cast<_RTp*>(__r.get()));
 }
 
-template<class _Tp, class _Up>
-shared_ptr<_Tp>
-reinterpret_pointer_cast(const shared_ptr<_Up>& __r) _NOEXCEPT
-{
-    return shared_ptr<_Tp>(__r,
-                           reinterpret_cast<
-                               typename shared_ptr<_Tp>::element_type*>(__r.get()));
-}
-
 #ifndef _LIBCPP_NO_RTTI
 
 template<class _Dp, class _Tp>
@@ -5118,7 +5080,7 @@ struct _LIBCPP_TEMPLATE_VIS hash<shared_ptr<_Tp> >
     _LIBCPP_INLINE_VISIBILITY
     result_type operator()(const argument_type& __ptr) const _NOEXCEPT
     {
-        return hash<typename shared_ptr<_Tp>::element_type*>()(__ptr.get());
+        return hash<_Tp*>()(__ptr.get());
     }
 };
 

diff  --git a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/types.pass.cpp b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/types.pass.cpp
index b33f4043e1e0..c3aedd5b1ad2 100644
--- a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/types.pass.cpp
+++ b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/types.pass.cpp
@@ -20,42 +20,14 @@
 
 #include "test_macros.h"
 
-#if TEST_STD_VER > 14
-template <typename T, typename = std::void_t<> >
-struct has_less : std::false_type {};
-
-template <typename T>
-struct has_less<T,
-                std::void_t<decltype(std::declval<T>() < std::declval<T>())> >
-    : std::true_type {};
-#endif
-
 struct A;  // purposefully incomplete
-struct B {
-  int x;
-  B() = default;
-};
 
-template <class T>
-void test() {
-  ASSERT_SAME_TYPE(typename std::shared_ptr<T>::element_type, T);
+int main(int, char**)
+{
+    static_assert((std::is_same<std::shared_ptr<A>::element_type, A>::value), "");
 #if TEST_STD_VER > 14
-  ASSERT_SAME_TYPE(typename std::shared_ptr<T>::weak_type, std::weak_ptr<T>);
-  static_assert(std::is_copy_constructible<std::shared_ptr<T> >::value, "");
-  static_assert(std::is_copy_assignable<std::shared_ptr<T> >::value, "");
-  static_assert(has_less<std::shared_ptr<T> >::value);
-  static_assert(
-      std::is_same<typename std::shared_ptr<T[]>::element_type, T>::value, "");
-  static_assert(
-      std::is_same<typename std::shared_ptr<T[8]>::element_type, T>::value, "");
+    static_assert((std::is_same<std::shared_ptr<A>::weak_type, std::weak_ptr<A>>::value), "");
 #endif
-}
-
-int main(int, char**) {
-  test<A>();
-  test<B>();
-  test<int>();
-  test<char*>();
 
   return 0;
 }

diff  --git a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.cast/const_pointer_cast.pass.cpp b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.cast/const_pointer_cast.pass.cpp
index 588a79f9b07f..e2bb126fd470 100644
--- a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.cast/const_pointer_cast.pass.cpp
+++ b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.cast/const_pointer_cast.pass.cpp
@@ -55,14 +55,6 @@ int main(int, char**)
         assert(pB.get() == pA.get());
         assert(!pB.owner_before(pA) && !pA.owner_before(pB));
     }
-#if TEST_STD_VER > 14
-    {
-      const std::shared_ptr<const A[8]> pA;
-      std::shared_ptr<A[8]> pB = std::const_pointer_cast<A[8]>(pA);
-      assert(pB.get() == pA.get());
-      assert(!pB.owner_before(pA) && !pA.owner_before(pB));
-    }
-#endif // TEST_STD_VER > 14
 
-    return 0;
+  return 0;
 }

diff  --git a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.cast/dynamic_pointer_cast.pass.cpp b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.cast/dynamic_pointer_cast.pass.cpp
index de268eb769b5..d6d5da1197ac 100644
--- a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.cast/dynamic_pointer_cast.pass.cpp
+++ b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.cast/dynamic_pointer_cast.pass.cpp
@@ -55,14 +55,6 @@ int main(int, char**)
         assert(pA.get() == 0);
         assert(pA.use_count() == 0);
     }
-#if TEST_STD_VER > 14
-    {
-      const std::shared_ptr<B[8]> pB(new B[8]);
-      std::shared_ptr<A[8]> pA = std::dynamic_pointer_cast<A[8]>(pB);
-      assert(pA.get() == 0);
-      assert(pA.use_count() == 0);
-    }
-#endif // TEST_STD_VER > 14
 
-    return 0;
+  return 0;
 }

diff  --git a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.cast/reinterpret_pointer_cast.pass.cpp b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.cast/reinterpret_pointer_cast.pass.cpp
deleted file mode 100644
index 221001f91c17..000000000000
--- a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.cast/reinterpret_pointer_cast.pass.cpp
+++ /dev/null
@@ -1,52 +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
-//
-//===----------------------------------------------------------------------===//
-
-// <memory>
-
-// shared_ptr
-
-// template<class T, class U>
-//     shared_ptr<T> reinterpret_pointer_cast(const shared_ptr<U>& r) noexcept;
-
-#include "test_macros.h"
-
-#include <memory>
-#include <type_traits>
-#include <cassert>
-
-struct A {
-  int x;
-};
-
-int main(int, char**) {
-  {
-    const std::shared_ptr<A> pA(new A);
-    std::shared_ptr<int> pi = std::reinterpret_pointer_cast<int>(pA);
-    std::shared_ptr<A> pA2 = std::reinterpret_pointer_cast<A>(pi);
-    assert(pA2.get() == pA.get());
-    assert(!pi.owner_before(pA) && !pA.owner_before(pi));
-  }
-  {
-    const std::shared_ptr<A> pA;
-    std::shared_ptr<int> pi = std::reinterpret_pointer_cast<int>(pA);
-    std::shared_ptr<A> pA2 = std::reinterpret_pointer_cast<A>(pi);
-    assert(pA2.get() == pA.get());
-    assert(!pi.owner_before(pA) && !pA.owner_before(pi));
-  }
-#if TEST_STD_VER > 14
-  {
-    const std::shared_ptr<A[8]> pA;
-    std::shared_ptr<int[8]> pi = std::reinterpret_pointer_cast<int[8]>(pA);
-    std::shared_ptr<A[8]> pA2 = std::reinterpret_pointer_cast<A[8]>(pi);
-    assert(pA2.get() == pA.get());
-    assert(!pi.owner_before(pA) && !pA.owner_before(pi));
-  }
-#endif // TEST_STD_VER > 14
-
-  return 0;
-}

diff  --git a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.cast/static_pointer_cast.pass.cpp b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.cast/static_pointer_cast.pass.cpp
index 8f8dadea0d48..1fe674fa530e 100644
--- a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.cast/static_pointer_cast.pass.cpp
+++ b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.cast/static_pointer_cast.pass.cpp
@@ -67,20 +67,6 @@ int main(int, char**)
         assert(pB.get() == pA.get());
         assert(!pB.owner_before(pA) && !pA.owner_before(pB));
     }
-#if TEST_STD_VER > 14
-    {
-      const std::shared_ptr<A[8]> pA;
-      std::shared_ptr<B[8]> pB = std::static_pointer_cast<B[8]>(pA);
-      assert(pB.get() == pA.get());
-      assert(!pB.owner_before(pA) && !pA.owner_before(pB));
-    }
-    {
-      const std::shared_ptr<B[8]> pA;
-      std::shared_ptr<A[8]> pB = std::static_pointer_cast<A[8]>(pA);
-      assert(pB.get() == pA.get());
-      assert(!pB.owner_before(pA) && !pA.owner_before(pB));
-    }
-#endif // TEST_STD_VER > 14
 
-    return 0;
+  return 0;
 }

diff  --git a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/default.pass.cpp b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/default.pass.cpp
index 4efa18f63f52..17b346d3a13f 100644
--- a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/default.pass.cpp
+++ b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/default.pass.cpp
@@ -15,21 +15,11 @@
 
 #include "test_macros.h"
 
-struct A {};
-
-template <class T>
-void test() {
-  std::shared_ptr<T> p;
-  assert(p.use_count() == 0);
-  assert(p.get() == 0);
-}
-
-int main(int, char**) {
-  test<int>();
-  test<A>();
-  test<int*>();
-  test<int[]>();
-  test<int[8]>();
+int main(int, char**)
+{
+    std::shared_ptr<int> p;
+    assert(p.use_count() == 0);
+    assert(p.get() == 0);
 
   return 0;
 }

diff  --git a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer.pass.cpp b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer.pass.cpp
index b055543336d5..6eceb552ec14 100644
--- a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer.pass.cpp
+++ b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/pointer.pass.cpp
@@ -45,21 +45,5 @@ int main(int, char**)
     }
     assert(A::count == 0);
 
-#if TEST_STD_VER > 14
-    {
-      std::shared_ptr<A[8]> pA(new A[8]);
-      assert(pA.use_count() == 1);
-      assert(A::count == 8);
-    }
-    assert(A::count == 0);
-
-    {
-      std::shared_ptr<A[]> pA(new A[8]);
-      assert(pA.use_count() == 1);
-      assert(A::count == 8);
-    }
-    assert(A::count == 0);
-#endif
-
-    return 0;
+  return 0;
 }

diff  --git a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/shared_ptr_copy_move.fail.cpp b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/shared_ptr_copy_move.fail.cpp
deleted file mode 100644
index 41452fd1af12..000000000000
--- a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/shared_ptr_copy_move.fail.cpp
+++ /dev/null
@@ -1,50 +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
-//
-//===----------------------------------------------------------------------===//
-
-// <memory>
-
-// shared_ptr
-
-// template<class Y> shared_ptr(const shared_ptr<Y>& r);
-
-#include <memory>
-#include <type_traits>
-
-struct A {
-  int x = 42;
-};
-
-struct ADel : std::default_delete<A> {
-  typedef A* pointer;
-};
-
-int main(int, char**) {
-  static_assert(!(std::is_convertible<A, int>::value), "");
-
-  {
-    std::shared_ptr<A> pA;
-    std::shared_ptr<int> pi(pA); // expected-error {{no matching constructor for initialization of 'std::shared_ptr<int>'}}
-  }
-  {
-    std::shared_ptr<A> pA;
-    std::shared_ptr<int> pi(std::move(pA)); // expected-error {{no matching constructor for initialization of 'std::shared_ptr<int>'}}
-  }
-  {
-    std::weak_ptr<A> pA;
-    std::shared_ptr<int> pi(std::move(pA)); // expected-error {{no matching constructor for initialization of 'std::shared_ptr<int>'}}
-  }
-
-#if TEST_STD_VER > 14
-  {
-    std::unique_ptr<int, ADel> ui;
-    std::shared_ptr<int> pi(std::move(ui)); // expected-error {{no matching constructor for initialization of 'std::shared_ptr<int>'}}
-  }
-#endif
-
-  return 0;
-}

diff  --git a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/shared_ptr_pointer.pass.cpp b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/shared_ptr_pointer.pass.cpp
index d4a783a5bb48..3a600f8e30bb 100644
--- a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/shared_ptr_pointer.pass.cpp
+++ b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/shared_ptr_pointer.pass.cpp
@@ -44,7 +44,6 @@ int main(int, char**)
     {
         std::shared_ptr<A> pA(new A);
         assert(pA.use_count() == 1);
-
         {
             B b;
             std::shared_ptr<B> pB(pA, &b);
@@ -61,38 +60,5 @@ int main(int, char**)
     assert(A::count == 0);
     assert(B::count == 0);
 
-    {
-      std::shared_ptr<int> p1(nullptr);
-      std::shared_ptr<int> p2(p1, new int);
-      assert(p2.get() != nullptr);
-    }
-    {
-      std::shared_ptr<int> p1(new int);
-      std::shared_ptr<int> p2(p1, nullptr);
-      assert(p2.get() == nullptr);
-    }
-
-#if TEST_STD_VER > 17
-    {
-      std::shared_ptr<A> pA(new A);
-      assert(pA.use_count() == 1);
-
-      {
-        B b;
-        std::shared_ptr<B> pB(std::move(pA), &b);
-        assert(A::count == 1);
-        assert(B::count == 1);
-        assert(pA.use_count() == 2);
-        assert(pB.use_count() == 2);
-        assert(pB.get() == &b);
-      }
-      assert(pA.use_count() == 1);
-      assert(A::count == 1);
-      assert(B::count == 0);
-    }
-    assert(A::count == 0);
-    assert(B::count == 0);
-#endif
-
-    return 0;
+  return 0;
 }

diff  --git a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/unique_ptr.pass.cpp b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/unique_ptr.pass.cpp
index 40b68f6a896b..91716fca0574 100644
--- a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/unique_ptr.pass.cpp
+++ b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.const/unique_ptr.pass.cpp
@@ -56,19 +56,6 @@ struct D {
 void ref(D);
 }
 
-template <class T>
-struct StatefulDeleter {
-  int state = 0;
-
-  StatefulDeleter(int val = 0) : state(val) {}
-  StatefulDeleter(StatefulDeleter const&) { assert(false); }
-
-  void operator()(T* ptr) {
-    assert(state == 42);
-    delete ptr;
-  }
-};
-
 int main(int, char**)
 {
     {
@@ -103,29 +90,11 @@ int main(int, char**)
             assert(A::count == 0);
             assert(B::count == 0);
             assert(ptr.get() == 0);
-#endif // TEST_STD_VER >= 11
-        }
-    }
 #endif
-
-#if TEST_STD_VER > 14
-    {
-      std::unique_ptr<int> ptr;
-      std::shared_ptr<int> p(std::move(ptr));
-      assert(p.get() == 0);
-      assert(p.use_count() == 0);
+        }
     }
 #endif
-
-    {
-      StatefulDeleter<A> d;
-      std::unique_ptr<A, StatefulDeleter<A>&> u(new A, d);
-      std::shared_ptr<A> p(std::move(u));
-      d.state = 42;
-      assert(A::count == 1);
-    }
     assert(A::count == 0);
-
     { // LWG 2399
         fn(std::unique_ptr<int>(new int));
     }

diff  --git a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.create/make_shared.protected.fail.cpp b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.create/make_shared.protected.fail.cpp
index 75bb497fdab8..d708743814ea 100644
--- a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.create/make_shared.protected.fail.cpp
+++ b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.create/make_shared.protected.fail.cpp
@@ -27,8 +27,7 @@ struct S {
 
 int main(int, char**)
 {
-  std::shared_ptr<S> p = std::make_shared<
-      S>(); // expected-error at memory:* {{static_assert failed due to requirement 'is_constructible<S>::value' "Can't construct object in make_shared"}}
+    std::shared_ptr<S> p = std::make_shared<S>();  // expected-error-re at memory:* {{static_assert failed{{.*}} "Can't construct object in make_shared"}}
 
   return 0;
 }

diff  --git a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.obs/op_arrow.fail.cpp b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.obs/op_arrow.fail.cpp
deleted file mode 100644
index c4ed32c293c3..000000000000
--- a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.obs/op_arrow.fail.cpp
+++ /dev/null
@@ -1,36 +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
-//
-//===----------------------------------------------------------------------===//
-
-// <memory>
-
-// UNSUPPORTED: c++98, c++03, c++11, c++14
-
-// shared_ptr
-
-// element_type& operator[](ptr
diff _t i) const;
-
-#include "test_macros.h"
-
-#include <memory>
-#include <cassert>
-
-struct Foo {
-  void call() {}
-};
-
-int main(int, char**) {
-  // Check that we get a static assertion when we try to use the bracket
-  // operator on shared_ptr<T> when T is not an array type.
-  const std::shared_ptr<Foo[]> p1;
-  (void)p1
-      ->call(); // expected-error at memory:* {{std::shared_ptr<T>::operator-> is only valid when T is not an array type.}}
-  const std::shared_ptr<Foo[4]> p2;
-  (void)p2
-      ->call(); // expected-error at memory:* {{std::shared_ptr<T>::operator-> is only valid when T is not an array type.}}
-  return 0;
-}

diff  --git a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.obs/op_bool.pass.cpp b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.obs/op_bool.pass.cpp
index 80162246d244..69b0ff3ed5c9 100644
--- a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.obs/op_bool.pass.cpp
+++ b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.obs/op_bool.pass.cpp
@@ -17,27 +17,16 @@
 
 #include "test_macros.h"
 
-struct A {
-  int a;
-  virtual ~A(){};
-};
-struct B : A {};
-
 int main(int, char**)
 {
     {
-      const std::shared_ptr<int> p(new int(32));
-      assert(p);
-    }
-    {
-      const std::shared_ptr<int> p;
-      assert(!p);
+    const std::shared_ptr<int> p(new int(32));
+    assert(p);
     }
     {
-      std::shared_ptr<A> basePtr = std::make_shared<B>();
-      std::shared_ptr<B> sp = std::dynamic_pointer_cast<B>(basePtr);
-      assert(sp);
+    const std::shared_ptr<int> p;
+    assert(!p);
     }
 
-    return 0;
+  return 0;
 }

diff  --git a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.obs/op_bracket.fail.cpp b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.obs/op_bracket.fail.cpp
deleted file mode 100644
index aef8ef75fcd2..000000000000
--- a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.obs/op_bracket.fail.cpp
+++ /dev/null
@@ -1,29 +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
-//
-//===----------------------------------------------------------------------===//
-
-// <memory>
-
-// UNSUPPORTED: c++98, c++03, c++11, c++14
-
-// shared_ptr
-
-// element_type& operator[](ptr
diff _t i) const;
-
-#include "test_macros.h"
-
-#include <memory>
-#include <cassert>
-
-int main(int, char**) {
-  // Check that we get a static assertion when we try to use the bracket
-  // operator on shared_ptr<T> when T is not an array type.
-  const std::shared_ptr<int> p;
-  (void)p
-      [0]; // expected-error at memory:* {{std::shared_ptr<T>::operator[] is only valid when T is an array type.}}
-  return 0;
-}

diff  --git a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.obs/op_bracket.pass.cpp b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.obs/op_bracket.pass.cpp
deleted file mode 100644
index 4a976fa296aa..000000000000
--- a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.shared/util.smartptr.shared.obs/op_bracket.pass.cpp
+++ /dev/null
@@ -1,51 +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
-//
-//===----------------------------------------------------------------------===//
-
-// <memory>
-
-// UNSUPPORTED: c++98, c++03, c++11, c++14
-
-// shared_ptr
-
-// element_type& operator[](ptr
diff _t i) const;
-
-#include "test_macros.h"
-
-#include <memory>
-#include <cassert>
-
-int main(int, char**) {
-  {
-    const std::shared_ptr<int[8]> p(new int[8]);
-
-    for (int i = 0; i < 8; ++i)
-      p[i] = i;
-    for (int i = 0; i < 8; ++i)
-      assert(p[i] == i);
-  }
-  {
-    int* iptr = new int[8];
-    for (int i = 0; i < 8; ++i)
-      iptr[i] = i;
-
-    const std::shared_ptr<int[8]> p(iptr);
-
-    for (int i = 0; i < 8; ++i)
-      assert(p[i] == i);
-  }
-  {
-    const std::shared_ptr<int[]> p(new int[8]);
-
-    for (int i = 0; i < 8; ++i)
-      p[i] = i;
-    for (int i = 0; i < 8; ++i)
-      assert(p[i] == i);
-  }
-
-  return 0;
-}

diff  --git a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.weak/util.smartptr.weak.assign/shared_ptr_Y.pass.cpp b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.weak/util.smartptr.weak.assign/shared_ptr_Y.pass.cpp
index f899dc426251..6d6f4e13556d 100644
--- a/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.weak/util.smartptr.weak.assign/shared_ptr_Y.pass.cpp
+++ b/libcxx/test/std/utilities/memory/util.smartptr/util.smartptr.weak/util.smartptr.weak.assign/shared_ptr_Y.pass.cpp
@@ -45,7 +45,6 @@ int main(int, char**)
 {
     {
         const std::shared_ptr<A> pA(new A);
-        assert(pA.use_count() == 1);
         {
             std::weak_ptr<B> pB;
             pB = pA;

diff  --git a/libcxx/www/cxx1z_status.html b/libcxx/www/cxx1z_status.html
index 83aedb96bdb7..8f3f88310a74 100644
--- a/libcxx/www/cxx1z_status.html
+++ b/libcxx/www/cxx1z_status.html
@@ -128,7 +128,7 @@ <h3>Paper Status</h3>
 	<tr><td><a href="https://wg21.link/P0003R5">P0003R5</a></td><td>LWG</td><td>Removing Deprecated Exception Specifications from C++17</td><td>Issaquah</td><td>Complete</td><td>5.0</td></tr>
 	<tr><td><a href="https://wg21.link/P0067R5">P0067R5</a></td><td>LWG</td><td>Elementary string conversions, revision 5</td><td>Issaquah</td><td><i>Partially done</i></td><td></td></tr>
 	<tr><td><a href="https://wg21.link/P0403R1">P0403R1</a></td><td>LWG</td><td>Literal suffixes for <tt>basic_string_view</tt></td><td>Issaquah</td><td>Complete</td><td>4.0</td></tr>
-	<tr><td><a href="https://wg21.link/P0414R2">P0414R2</a></td><td>LWG</td><td>Merging shared_ptr changes from Library Fundamentals to C++17</td><td>Issaquah</td><td>Complete</td><td>11.0</td></tr>
+	<tr><td><a href="https://wg21.link/P0414R2">P0414R2</a></td><td>LWG</td><td>Merging shared_ptr changes from Library Fundamentals to C++17</td><td>Issaquah</td><td></td><td></td></tr>
 	<tr><td><a href="https://wg21.link/P0418R2">P0418R2</a></td><td>LWG</td><td>Fail or succeed: there is no atomic lattice</td><td>Issaquah</td><td></td><td></td></tr>
 	<tr><td><a href="https://wg21.link/P0426R1">P0426R1</a></td><td>LWG</td><td>Constexpr for <tt>std::char_traits</tt></td><td>Issaquah</td><td>Complete</td><td>4.0</td></tr>
 	<tr><td><a href="https://wg21.link/P0435R1">P0435R1</a></td><td>LWG</td><td>Resolving LWG Issues re <tt>common_type</tt></td><td>Issaquah</td><td>Complete</td><td>4.0</td></tr>


        


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