--- old/src/share/vm/opto/callnode.cpp	2015-07-28 15:53:13.226296140 +0200
+++ new/src/share/vm/opto/callnode.cpp	2015-07-28 15:53:12.787299385 +0200
@@ -724,7 +724,7 @@
 //
 bool CallNode::may_modify(const TypeOopPtr *t_oop, PhaseTransform *phase) {
   assert((t_oop != NULL), "sanity");
-  if (is_call_to_arraycopystub()) {
+  if (is_call_to_arraycopystub() && strcmp(_name, "unsafe_arraycopy")) {
     const TypeTuple* args = _tf->domain();
     Node* dest = NULL;
     // Stubs that can be called once an ArrayCopyNode is expanded have