--- a/hotspot/src/cpu/x86/vm/c1_LIRGenerator_x86.cpp	Wed Jul 28 17:57:43 2010 -0400
+++ b/hotspot/src/cpu/x86/vm/c1_LIRGenerator_x86.cpp	Tue Aug 03 08:13:38 2010 -0400
@@ -349,7 +349,7 @@
   LIR_Opr lock = new_register(T_INT);
   LIR_Opr obj_temp = new_register(T_INT);
   set_no_result(x);
-  monitor_exit(obj_temp, lock, syncTempOpr(), x->monitor_no());
+  monitor_exit(obj_temp, lock, syncTempOpr(), LIR_OprFact::illegalOpr, x->monitor_no());
 }