--- old/src/share/vm/opto/cfgnode.cpp	2016-04-14 14:04:23.016655043 +0200
+++ new/src/share/vm/opto/cfgnode.cpp	2016-04-14 14:04:22.940655040 +0200
@@ -1703,16 +1703,19 @@
     }
 
     if (uncasted) {
-      // Wait until after parsing for the type information to propagate from the casts
+      // Add a cast node between the phi to be removed and its unique input.
+      // Wait until after parsing for the type information to propagate from the casts.
       assert(can_reshape, "Invalid during parsing");
       const Type* phi_type = bottom_type();
       assert(phi_type->isa_int() || phi_type->isa_ptr(), "bad phi type");
       int opcode;
+      // Determine the type of cast to be added.
       if (phi_type->isa_int()) {
         opcode = Op_CastII;
       } else {
         const Type* uin_type = phase->type(uin);
-        if (phi_type->join(TypePtr::NOTNULL) == uin_type->join(TypePtr::NOTNULL)) {
+        if ((phi_type->join(TypePtr::NOTNULL) == uin_type->join(TypePtr::NOTNULL)) ||
+            (phi_type->isa_klassptr() && uin_type->isa_klassptr())) {
           opcode = Op_CastPP;
         } else {
           opcode = Op_CheckCastPP;