diff -r 6b056026ecad -r 8d82c4dfa722 hotspot/src/share/vm/c1/c1_InstructionPrinter.cpp
--- a/hotspot/src/share/vm/c1/c1_InstructionPrinter.cpp	Wed Sep 19 16:50:26 2012 -0700
+++ b/hotspot/src/share/vm/c1/c1_InstructionPrinter.cpp	Thu Sep 20 16:49:17 2012 +0200
@@ -831,6 +831,12 @@
   output()->put(')');
 }
 
+void InstructionPrinter::do_UnsafeGetAndSetObject(UnsafeGetAndSetObject* x) {
+  print_unsafe_object_op(x, x->is_add()?"UnsafeGetAndSetObject (add)":"UnsafeGetAndSetObject");
+  output()->print(", value ");
+  print_value(x->value());
+  output()->put(')');
+}
 
 void InstructionPrinter::do_UnsafePrefetchRead(UnsafePrefetchRead* x) {
   print_unsafe_object_op(x, "UnsafePrefetchRead");