--- a/hotspot/src/share/vm/ci/ciTypeFlow.hpp	Tue Oct 27 01:45:01 2015 -0400
+++ b/hotspot/src/share/vm/ci/ciTypeFlow.hpp	Fri Nov 06 09:36:47 2015 +0100
@@ -529,6 +529,7 @@
     GrowableArray<Block*>*           _exceptions;
     GrowableArray<ciInstanceKlass*>* _exc_klasses;
     GrowableArray<Block*>*           _successors;
+    GrowableArray<Block*>*           _predecessors;
     StateVector*                     _state;
     JsrSet*                          _jsrs;
 
@@ -617,6 +618,12 @@
       return _successors;
     }
 
+    // Predecessors of this block (including exception edges)
+    GrowableArray<Block*>* predecessors() {
+      assert(_predecessors != NULL, "must be filled in");
+      return _predecessors;
+    }
+
     // Get the exceptional successors for this Block.
     GrowableArray<Block*>* exceptions() {
       if (_exceptions == NULL) {
@@ -941,6 +948,9 @@
   // Perform type inference flow analysis.
   void do_flow();
 
+  // Determine if bci is dominated by dom_bci
+  bool is_dominated_by(int bci, int dom_bci);
+
   void print_on(outputStream* st) const PRODUCT_RETURN;
 
   void rpo_print_on(outputStream* st) const PRODUCT_RETURN;