diff -r 3ef1a1866a60 -r 9dc311b8473e src/share/vm/opto/parse.hpp
--- a/src/share/vm/opto/parse.hpp	Mon Mar 21 02:30:49 2011 -0700
+++ b/src/share/vm/opto/parse.hpp	Mon Mar 21 11:28:14 2011 -0700
@@ -136,6 +136,7 @@
     uint               _count;          // how many times executed?  Currently only set by _goto's
     bool               _is_parsed;      // has this block been parsed yet?
     bool               _is_handler;     // is this block an exception handler?
+    bool               _has_merged_backedge; // does this block have merged backedge?
     SafePointNode*     _start_map;      // all values flowing into this block
     MethodLivenessResult _live_locals;  // lazily initialized liveness bitmap
 
@@ -168,6 +169,18 @@
     // True after any predecessor flows control into this block
     bool is_merged() const                 { return _start_map != NULL; }
 
+#ifdef ASSERT
+    // True after backedge predecessor flows control into this block
+    bool has_merged_backedge() const       { return _has_merged_backedge; }
+    void mark_merged_backedge(Block* pred) {
+      assert(is_SEL_head(), "should be loop head");
+      if (pred != NULL && is_SEL_backedge(pred)) {
+        assert(is_parsed(), "block should be parsed before merging backedges");
+        _has_merged_backedge = true;
+      }
+    }
+#endif
+
     // True when all non-exception predecessors have been parsed.
     bool is_ready() const                  { return preds_parsed() == pred_count(); }
 
@@ -441,11 +454,6 @@
     }
   }
 
-  // Return true if the parser should add a loop predicate
-  bool should_add_predicate(int target_bci);
-  // Insert a loop predicate into the graph
-  void add_predicate();
-
   // Note:  Intrinsic generation routines may be found in library_call.cpp.
 
   // Helper function to setup Ideal Call nodes