--- old/src/share/vm/opto/phaseX.hpp	2015-10-14 13:54:28.601541684 +0200
+++ new/src/share/vm/opto/phaseX.hpp	2015-10-14 13:54:28.495544247 +0200
@@ -190,6 +190,8 @@
   // _nodes is used in varying ways by subclasses, which define local accessors
 
 public:
+  virtual PhaseIterGVN *is_IterGVN() { return 0; }
+
   // Get a previously recorded type for the node n.
   // This type must already have been recorded.
   // If you want the type of a very new (untransformed) node,