--- old/src/hotspot/share/opto/graphKit.hpp	2018-02-22 16:36:24.544515705 +0100
+++ new/src/hotspot/share/opto/graphKit.hpp	2018-02-22 16:36:24.348516975 +0100
@@ -919,6 +919,8 @@
 
   // Produce new array node of stable type
   Node* cast_array_to_stable(Node* ary, const TypeAryPtr* ary_type);
+
+  Node* acmp(Node* a, Node* b);
 };
 
 // Helper class to support building of control flow branches. Upon