diff -r 18d56ca3e901 -r ad5dd04754ee src/share/vm/opto/cfgnode.cpp
--- a/src/share/vm/opto/cfgnode.cpp	Mon Dec 17 11:00:22 2012 -0800
+++ b/src/share/vm/opto/cfgnode.cpp	Tue Dec 18 14:55:25 2012 +0100
@@ -1566,6 +1566,10 @@
     Node* n = in(j);            // Get the input
     if (rc == NULL || phase->type(rc) == Type::TOP) {
       if (n != top) {           // Not already top?
+        PhaseIterGVN *igvn = phase->is_IterGVN();
+        if (can_reshape && igvn != NULL) {
+          igvn->_worklist.push(r);
+        }
         set_req(j, top);        // Nuke it down
         progress = this;        // Record progress
       }