--- old/src/share/vm/opto/block.cpp	Mon Aug 15 17:13:57 2011
+++ new/src/share/vm/opto/block.cpp	Mon Aug 15 17:13:57 2011
@@ -839,7 +839,7 @@
 
       // Make sure we TRUE branch to the target
       if( proj0->Opcode() == Op_IfFalse ) {
-        iff->negate();
+        iff->as_MachIf()->negate();
       }
 
       b->_nodes.pop();          // Remove IfFalse & IfTrue projections