diff --git a/libcxx/include/__config b/libcxx/include/__config
index a45b02d..43fbf87 100644
--- a/libcxx/include/__config
+++ b/libcxx/include/__config
@@ -174,7 +174,7 @@
 #endif
 
 #ifndef _LIBCPP_TYPE_VIS
-#  if __has_attribute(type_visibility)
+#  if __has_attribute(__type_visibility__)
 #    define _LIBCPP_TYPE_VIS __attribute__ ((__type_visibility__("default")))
 #  else
 #    define _LIBCPP_TYPE_VIS __attribute__ ((__visibility__("default")))
diff --git a/libcxx/include/memory b/libcxx/include/memory
index bf44837..b382f70 100644
--- a/libcxx/include/memory
+++ b/libcxx/include/memory
@@ -1954,7 +1954,7 @@
     _LIBCPP_INLINE_VISIBILITY __libcpp_compressed_pair_imp(_T1_param __t1, _T2_param __t2)
         : __first_(_VSTD::forward<_T1_param>(__t1)), __second_(_VSTD::forward<_T2_param>(__t2)) {}
 
-#ifdef _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS
+#if defined(_LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS) && !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES)
 
     _LIBCPP_INLINE_VISIBILITY
     __libcpp_compressed_pair_imp(const __libcpp_compressed_pair_imp& __p)
@@ -1973,8 +1973,6 @@
             return *this;
         }
 
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
-
     _LIBCPP_INLINE_VISIBILITY
     __libcpp_compressed_pair_imp(__libcpp_compressed_pair_imp&& __p)
         _NOEXCEPT_(is_nothrow_move_constructible<_T1>::value &&
@@ -1992,9 +1990,7 @@
             return *this;
         }
 
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
-
-#endif  // _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS
+#endif  // defined(_LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS) && !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES)
 
 #ifndef _LIBCPP_HAS_NO_VARIADICS
 
@@ -2051,7 +2047,7 @@
     _LIBCPP_INLINE_VISIBILITY __libcpp_compressed_pair_imp(_T1_param __t1, _T2_param __t2)
         : _T1(_VSTD::forward<_T1_param>(__t1)), __second_(_VSTD::forward<_T2_param>(__t2)) {}
 
-#ifdef _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS
+#if defined(_LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS) && !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES)
 
     _LIBCPP_INLINE_VISIBILITY
     __libcpp_compressed_pair_imp(const __libcpp_compressed_pair_imp& __p)
@@ -2069,8 +2065,6 @@
             return *this;
         }
 
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
-
     _LIBCPP_INLINE_VISIBILITY
     __libcpp_compressed_pair_imp(__libcpp_compressed_pair_imp&& __p)
         _NOEXCEPT_(is_nothrow_move_constructible<_T1>::value &&
@@ -2087,9 +2081,7 @@
             return *this;
         }
 
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
-
-#endif  // _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS
+#endif  // defined(_LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS) && !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES)
 
 #ifndef _LIBCPP_HAS_NO_VARIADICS
 
@@ -2147,7 +2139,7 @@
                    is_nothrow_move_constructible<_T2>::value)
         : _T2(_VSTD::forward<_T2_param>(__t2)), __first_(_VSTD::forward<_T1_param>(__t1)) {}
 
-#ifdef _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS
+#if defined(_LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS) && !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES)
 
     _LIBCPP_INLINE_VISIBILITY
     __libcpp_compressed_pair_imp(const __libcpp_compressed_pair_imp& __p)
@@ -2165,8 +2157,6 @@
             return *this;
         }
 
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
-
     _LIBCPP_INLINE_VISIBILITY
     __libcpp_compressed_pair_imp(__libcpp_compressed_pair_imp&& __p)
         _NOEXCEPT_(is_nothrow_move_constructible<_T1>::value &&
@@ -2183,9 +2173,7 @@
             return *this;
         }
 
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
-
-#endif  // _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS
+#endif  // defined(_LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS) && !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES)
 
 #ifndef _LIBCPP_HAS_NO_VARIADICS
 
@@ -2241,7 +2229,7 @@
     _LIBCPP_INLINE_VISIBILITY __libcpp_compressed_pair_imp(_T1_param __t1, _T2_param __t2)
         : _T1(_VSTD::forward<_T1_param>(__t1)), _T2(_VSTD::forward<_T2_param>(__t2)) {}
 
-#ifdef _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS
+#if defined(_LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS) && !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES)
 
     _LIBCPP_INLINE_VISIBILITY
     __libcpp_compressed_pair_imp(const __libcpp_compressed_pair_imp& __p)
@@ -2259,8 +2247,6 @@
             return *this;
         }
 
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
-
     _LIBCPP_INLINE_VISIBILITY
     __libcpp_compressed_pair_imp(__libcpp_compressed_pair_imp&& __p)
         _NOEXCEPT_(is_nothrow_move_constructible<_T1>::value &&
@@ -2277,9 +2263,7 @@
             return *this;
         }
 
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
-
-#endif  // _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS
+#endif  // defined(_LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS) && !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES)
 
 #ifndef _LIBCPP_HAS_NO_VARIADICS
 
@@ -2332,7 +2316,7 @@
     _LIBCPP_INLINE_VISIBILITY __compressed_pair(_T1_param __t1, _T2_param __t2)
         : base(_VSTD::forward<_T1_param>(__t1), _VSTD::forward<_T2_param>(__t2)) {}
 
-#ifdef _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS
+#if defined(_LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS) && !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES)
 
     _LIBCPP_INLINE_VISIBILITY
     __compressed_pair(const __compressed_pair& __p)
@@ -2349,7 +2333,6 @@
             return *this;
         }
 
-#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     _LIBCPP_INLINE_VISIBILITY
     __compressed_pair(__compressed_pair&& __p)
         _NOEXCEPT_(is_nothrow_move_constructible<_T1>::value &&
@@ -2365,9 +2348,7 @@
             return *this;
         }
 
-#endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
-
-#endif  // _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS
+#endif  // defined(_LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS) && !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES)
 
 #ifndef _LIBCPP_HAS_NO_VARIADICS
 
diff --git a/libcxx/include/type_traits b/libcxx/include/type_traits
index b6430fb..c4afe5e 100644
--- a/libcxx/include/type_traits
+++ b/libcxx/include/type_traits
@@ -2437,7 +2437,7 @@
 // is_trivially_copy_constructible
 
 template <class _Tp> struct _LIBCPP_TYPE_VIS_ONLY is_trivially_copy_constructible
-    : public is_trivially_constructible<_Tp, const typename add_lvalue_reference<_Tp>::type>
+    : public is_trivially_constructible<_Tp, typename add_lvalue_reference<const _Tp>::type>
     {};
 
 // is_trivially_move_constructible
diff --git a/libcxx/include/utility b/libcxx/include/utility
index 5fc2cf2..303dd4e 100644
--- a/libcxx/include/utility
+++ b/libcxx/include/utility
@@ -275,7 +275,7 @@
 #ifndef _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS
     _LIBCPP_INLINE_VISIBILITY
     pair(const pair& __p) = default;
-#else
+#elif !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES)  // default the copy ctor in C++03
     _LIBCPP_INLINE_VISIBILITY
     pair(const pair& __p)
         _NOEXCEPT_(is_nothrow_copy_constructible<first_type>::value &&
diff --git a/libcxx/test/utilities/utility/pairs/pairs.pair/copy_ctor.pass.cpp b/libcxx/test/utilities/utility/pairs/pairs.pair/copy_ctor.pass.cpp
index b163f24..4b54f71 100644
--- a/libcxx/test/utilities/utility/pairs/pairs.pair/copy_ctor.pass.cpp
+++ b/libcxx/test/utilities/utility/pairs/pairs.pair/copy_ctor.pass.cpp
@@ -26,6 +26,8 @@
         assert(p2.second == 4);
     }
 
+    static_assert((std::is_trivially_copy_constructible<std::pair<int, int> >::value), "");
+
 #if _LIBCPP_STD_VER > 11
     {
         typedef std::pair<int, short> P1;