Fix http://llvm.org/bugs/show_bug.cgi?id=11461.  Credit Alberto Ganesh Barbati.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@146345 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/ext/hash_map b/include/ext/hash_map
index f6a11f0..bebdccb 100644
--- a/include/ext/hash_map
+++ b/include/ext/hash_map
@@ -215,7 +215,11 @@
 
 using namespace std;
 
-template <class _Tp, class _Hash, bool = is_empty<_Hash>::value>
+template <class _Tp, class _Hash, bool = is_empty<_Hash>::value
+#if __has_feature(is_final)
+                                         && !__is_final(_Hash)
+#endif
+        >
 class __hash_map_hasher
     : private _Hash
 {
@@ -247,7 +251,11 @@
         {return __hash_(__x);}
 };
 
-template <class _Tp, class _Pred, bool = is_empty<_Pred>::value>
+template <class _Tp, class _Pred, bool = is_empty<_Pred>::value
+#if __has_feature(is_final)
+                                         && !__is_final(_Pred)
+#endif
+         >
 class __hash_map_equal
     : private _Pred
 {
diff --git a/include/map b/include/map
index abdaa3b..633579b 100644
--- a/include/map
+++ b/include/map
@@ -381,7 +381,11 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-template <class _Key, class _Tp, class _Compare, bool = is_empty<_Compare>::value>
+template <class _Key, class _Tp, class _Compare, bool = is_empty<_Compare>::value
+#if __has_feature(is_final)
+                                                        && !__is_final(_Compare)
+#endif
+         >
 class __map_value_compare
     : private _Compare
 {
diff --git a/include/memory b/include/memory
index c3e3af4..e7fe78e 100644
--- a/include/memory
+++ b/include/memory
@@ -1848,8 +1848,16 @@
 
 template <class _T1, class _T2, bool = is_same<typename remove_cv<_T1>::type,
                                                      typename remove_cv<_T2>::type>::value,
-                                bool = is_empty<_T1>::value,
-                                bool = is_empty<_T2>::value>
+                                bool = is_empty<_T1>::value
+#if __has_feature(is_final)
+                                       && !__is_final(_T1)
+#endif
+                                ,
+                                bool = is_empty<_T2>::value
+#if __has_feature(is_final)
+                                       && !__is_final(_T2)
+#endif
+         >
 struct __libcpp_compressed_pair_switch;
 
 template <class _T1, class _T2, bool IsSame>
diff --git a/include/tuple b/include/tuple
index d0f832e..9ae0587 100644
--- a/include/tuple
+++ b/include/tuple
@@ -146,7 +146,11 @@
 
 // __tuple_leaf
 
-template <size_t _Ip, class _Hp, bool=is_empty<_Hp>::value>
+template <size_t _Ip, class _Hp, bool=is_empty<_Hp>::value
+#if __has_feature(is_final)
+                                 && !__is_final(_Hp)
+#endif
+         >
 class __tuple_leaf;
 
 template <size_t _Ip, class _Hp, bool _Ep>
diff --git a/include/unordered_map b/include/unordered_map
index 0862e3f..3b1701e 100644
--- a/include/unordered_map
+++ b/include/unordered_map
@@ -325,7 +325,11 @@
 
 _LIBCPP_BEGIN_NAMESPACE_STD
 
-template <class _Tp, class _Hash, bool = is_empty<_Hash>::value>
+template <class _Tp, class _Hash, bool = is_empty<_Hash>::value
+#if __has_feature(is_final)
+                                         && !__is_final(_Hash)
+#endif
+         >
 class __unordered_map_hasher
     : private _Hash
 {
@@ -371,7 +375,11 @@
         {return __hash_(__x);}
 };
 
-template <class _Tp, class _Pred, bool = is_empty<_Pred>::value>
+template <class _Tp, class _Pred, bool = is_empty<_Pred>::value
+#if __has_feature(is_final)
+                                         && !__is_final(_Pred)
+#endif
+         >
 class __unordered_map_equal
     : private _Pred
 {