src/share/vm/opto/loopnode.hpp

*** 288,297 ****
--- 288,298 ----
      // have been optimized out by the IGVN so be cautious with the
      // pattern matching on the graph
      if (phi() == NULL) {
        return NULL;
      }
+     assert(phi()->is_Phi(), "should be PhiNode");
      Node *ln = phi()->in(0);
      if (ln->is_CountedLoop() && ln->as_CountedLoop()->loopexit() == this) {
        return (CountedLoopNode*)ln;
      }
      return NULL;