--- old/src/hotspot/share/opto/graphKit.hpp	2018-09-03 10:46:29.502452733 +0200
+++ new/src/hotspot/share/opto/graphKit.hpp	2018-09-03 10:46:29.202452737 +0200
@@ -823,6 +823,7 @@
   Node* gen_checkcast( Node *subobj, Node* superkls,
                        Node* *failure_control = NULL );
 
+  Node* is_always_locked(Node* obj);
   void gen_value_type_guard(Node* obj, int nargs = 0);
   void gen_value_type_array_guard(Node* ary, Node* obj, Node* elem_klass = NULL);
   void gen_flattened_array_guard(Node* ary, int nargs = 0);