*** old/src/share/vm/opto/loopnode.hpp	Fri Oct  3 11:53:02 2008
--- new/src/share/vm/opto/loopnode.hpp	Fri Oct  3 11:53:02 2008

*** 323,338 ****
--- 323,340 ----
    // Split shared headers and insert loop landing pads.
    // Insert a LoopNode to replace the RegionNode.
    // Returns TRUE if loop tree is structurally changed.
    bool beautify_loops( PhaseIdealLoop *phase );
  
-   // Perform iteration-splitting on inner loops.  Split iterations to avoid
    // range checks or one-shot null checks.
    void iteration_split( PhaseIdealLoop *phase, Node_List &old_new );
+   // avoid range checks or one-shot null checks.  Returns false if the
+   // current round of loop opts should stop.
+   bool iteration_split( PhaseIdealLoop *phase, Node_List &old_new );
  
!   // Driver for various flavors of iteration splitting.  Returns false
    void iteration_split_impl( PhaseIdealLoop *phase, Node_List &old_new );
+   // if the current round of loop opts should stop.
+   bool iteration_split_impl( PhaseIdealLoop *phase, Node_List &old_new );
  
    // Given dominators, try to find loops with calls that must always be
    // executed (call dominates loop tail).  These loops do not need non-call
    // safepoints (ncsfpt).
    void check_safepts(VectorSet &visited, Node_List &stack);