diff --git a/libcxx/include/barrier b/libcxx/include/barrier
--- a/libcxx/include/barrier
+++ b/libcxx/include/barrier
@@ -126,7 +126,7 @@
     __barrier_base(ptrdiff_t __expected, _CompletionF __completion = _CompletionF())
             : __expected(__expected), __base(__construct_barrier_algorithm_base(this->__expected),
                                              &__destroy_barrier_algorithm_base),
-              __expected_adjustment(0), __completion(move(__completion)), __phase(0)
+              __expected_adjustment(0), __completion(_VSTD::move(__completion)), __phase(0)
     {
     }
     [[nodiscard]] _LIBCPP_AVAILABILITY_SYNC _LIBCPP_INLINE_VISIBILITY
@@ -190,7 +190,7 @@
 
     _LIBCPP_INLINE_VISIBILITY
     __barrier_base(ptrdiff_t __expected, _CompletionF __completion = _CompletionF())
-        : __expected(__expected), __arrived(__expected), __completion(move(__completion)), __phase(false)
+        : __expected(__expected), __arrived(__expected), __completion(_VSTD::move(__completion)), __phase(false)
     {
     }
     [[nodiscard]] _LIBCPP_AVAILABILITY_SYNC _LIBCPP_INLINE_VISIBILITY
diff --git a/libcxx/include/valarray b/libcxx/include/valarray
--- a/libcxx/include/valarray
+++ b/libcxx/include/valarray
@@ -1536,21 +1536,21 @@
     gslice(size_t __start, const valarray<size_t>&  __size,
                                  valarray<size_t>&& __stride)
         : __size_(__size),
-          __stride_(move(__stride))
+          __stride_(_VSTD::move(__stride))
         {__init(__start);}
 
     _LIBCPP_INLINE_VISIBILITY
     gslice(size_t __start,       valarray<size_t>&& __size,
                            const valarray<size_t>&  __stride)
-        : __size_(move(__size)),
+        : __size_(_VSTD::move(__size)),
           __stride_(__stride)
         {__init(__start);}
 
     _LIBCPP_INLINE_VISIBILITY
     gslice(size_t __start,       valarray<size_t>&& __size,
                                  valarray<size_t>&& __stride)
-        : __size_(move(__size)),
-          __stride_(move(__stride))
+        : __size_(_VSTD::move(__size)),
+          __stride_(_VSTD::move(__stride))
         {__init(__start);}
 
 #endif // _LIBCPP_CXX03_LANG
@@ -1701,7 +1701,7 @@
 #ifndef _LIBCPP_CXX03_LANG
     gslice_array(gslice&& __gs, const valarray<value_type>& __v)
         : __vp_(const_cast<value_type*>(__v.__begin_)),
-          __1d_(move(__gs.__1d_))
+          __1d_(_VSTD::move(__gs.__1d_))
         {}
 #endif // _LIBCPP_CXX03_LANG
 
@@ -2395,7 +2395,7 @@
     _LIBCPP_INLINE_VISIBILITY
     indirect_array(valarray<size_t>&& __ia, const valarray<value_type>& __v)
         : __vp_(const_cast<value_type*>(__v.__begin_)),
-          __1d_(move(__ia))
+          __1d_(_VSTD::move(__ia))
         {}
 
 #endif // _LIBCPP_CXX03_LANG
@@ -2614,7 +2614,7 @@
     _LIBCPP_INLINE_VISIBILITY
     __indirect_expr(valarray<size_t>&& __ia, const _RmExpr& __e)
         : __expr_(__e),
-          __1d_(move(__ia))
+          __1d_(_VSTD::move(__ia))
           {}
 
 #endif // _LIBCPP_CXX03_LANG
@@ -3209,7 +3209,7 @@
 __val_expr<__indirect_expr<const valarray<_Tp>&> >
 valarray<_Tp>::operator[](gslice&& __gs) const
 {
-    return __val_expr<__indirect_expr<const valarray&> >(__indirect_expr<const valarray&>(move(__gs.__1d_), *this));
+    return __val_expr<__indirect_expr<const valarray&> >(__indirect_expr<const valarray&>(_VSTD::move(__gs.__1d_), *this));
 }
 
 template <class _Tp>
@@ -3217,7 +3217,7 @@
 gslice_array<_Tp>
 valarray<_Tp>::operator[](gslice&& __gs)
 {
-    return gslice_array<value_type>(move(__gs), *this);
+    return gslice_array<value_type>(_VSTD::move(__gs), *this);
 }
 
 #endif // _LIBCPP_CXX03_LANG
@@ -3245,7 +3245,7 @@
 __val_expr<__mask_expr<const valarray<_Tp>&> >
 valarray<_Tp>::operator[](valarray<bool>&& __vb) const
 {
-    return __val_expr<__mask_expr<const valarray&> >(__mask_expr<const valarray&>(move(__vb), *this));
+    return __val_expr<__mask_expr<const valarray&> >(__mask_expr<const valarray&>(_VSTD::move(__vb), *this));
 }
 
 template <class _Tp>
@@ -3253,7 +3253,7 @@
 mask_array<_Tp>
 valarray<_Tp>::operator[](valarray<bool>&& __vb)
 {
-    return mask_array<value_type>(move(__vb), *this);
+    return mask_array<value_type>(_VSTD::move(__vb), *this);
 }
 
 #endif // _LIBCPP_CXX03_LANG
@@ -3281,7 +3281,7 @@
 __val_expr<__indirect_expr<const valarray<_Tp>&> >
 valarray<_Tp>::operator[](valarray<size_t>&& __vs) const
 {
-    return __val_expr<__indirect_expr<const valarray&> >(__indirect_expr<const valarray&>(move(__vs), *this));
+    return __val_expr<__indirect_expr<const valarray&> >(__indirect_expr<const valarray&>(_VSTD::move(__vs), *this));
 }
 
 template <class _Tp>
@@ -3289,7 +3289,7 @@
 indirect_array<_Tp>
 valarray<_Tp>::operator[](valarray<size_t>&& __vs)
 {
-    return indirect_array<value_type>(move(__vs), *this);
+    return indirect_array<value_type>(_VSTD::move(__vs), *this);
 }
 
 #endif // _LIBCPP_CXX03_LANG
diff --git a/libcxx/src/filesystem/directory_iterator.cpp b/libcxx/src/filesystem/directory_iterator.cpp
--- a/libcxx/src/filesystem/directory_iterator.cpp
+++ b/libcxx/src/filesystem/directory_iterator.cpp
@@ -25,8 +25,8 @@
   __dir_stream& operator=(const __dir_stream&) = delete;
 
   __dir_stream(__dir_stream&& __ds) noexcept : __stream_(__ds.__stream_),
-                                               __root_(move(__ds.__root_)),
-                                               __entry_(move(__ds.__entry_)) {
+                                               __root_(_VSTD::move(__ds.__root_)),
+                                               __entry_(_VSTD::move(__ds.__entry_)) {
     __ds.__stream_ = INVALID_HANDLE_VALUE;
   }
 
@@ -104,8 +104,8 @@
   __dir_stream& operator=(const __dir_stream&) = delete;
 
   __dir_stream(__dir_stream&& other) noexcept : __stream_(other.__stream_),
-                                                __root_(move(other.__root_)),
-                                                __entry_(move(other.__entry_)) {
+                                                __root_(_VSTD::move(other.__root_)),
+                                                __entry_(_VSTD::move(other.__entry_)) {
     other.__stream_ = nullptr;
   }
 
@@ -187,7 +187,7 @@
 
   error_code m_ec;
   if (!__imp_->advance(m_ec)) {
-    path root = move(__imp_->__root_);
+    path root = _VSTD::move(__imp_->__root_);
     __imp_.reset();
     if (m_ec)
       err.report(m_ec, "at root " PATH_CSTR_FMT, root.c_str());
@@ -221,7 +221,7 @@
 
   __imp_ = make_shared<__shared_imp>();
   __imp_->__options_ = opt;
-  __imp_->__stack_.push(move(new_s));
+  __imp_->__stack_.push(_VSTD::move(new_s));
 }
 
 void recursive_directory_iterator::__pop(error_code* ec) {
@@ -275,7 +275,7 @@
   }
 
   if (m_ec) {
-    path root = move(stack.top().__root_);
+    path root = _VSTD::move(stack.top().__root_);
     __imp_.reset();
     err.report(m_ec, "at root " PATH_CSTR_FMT, root.c_str());
   } else {
@@ -309,7 +309,7 @@
   if (!skip_rec) {
     __dir_stream new_it(curr_it.__entry_.path(), __imp_->__options_, m_ec);
     if (new_it.good()) {
-      __imp_->__stack_.push(move(new_it));
+      __imp_->__stack_.push(_VSTD::move(new_it));
       return true;
     }
   }
@@ -320,7 +320,7 @@
       if (ec)
         ec->clear();
     } else {
-      path at_ent = move(curr_it.__entry_.__p_);
+      path at_ent = _VSTD::move(curr_it.__entry_.__p_);
       __imp_.reset();
       err.report(m_ec, "attempting recursion into " PATH_CSTR_FMT,
                  at_ent.c_str());