src/share/vm/opto/parse2.cpp

*** 65,80 ****
    const TypeAryPtr* arytype  = _gvn.type(ary)->is_aryptr();
    const TypeInt*    sizetype = arytype->size();
    const Type*       elemtype = arytype->elem();
  
    if (UseUniqueSubclasses && result2 != NULL) {
!     const Type* el = elemtype;
!     if (elemtype->isa_narrowoop()) {
!       el = elemtype->is_narrowoop()->make_oopptr();
!     }
!     const TypeInstPtr* toop = el->isa_instptr();
!     if (toop) {
        if (toop->klass()->as_instance_klass()->unique_concrete_subklass()) {
          // If we load from "AbstractClass[]" we must see "ConcreteSubClass".
          const Type* subklass = Type::get_const_type(toop->klass());
          elemtype = subklass->join(el);
        }
--- 65,77 ----
    const TypeAryPtr* arytype  = _gvn.type(ary)->is_aryptr();
    const TypeInt*    sizetype = arytype->size();
    const Type*       elemtype = arytype->elem();
  
    if (UseUniqueSubclasses && result2 != NULL) {
!     const Type* el = elemtype->make_ptr();
!     if (el && el->isa_instptr()) {
!       const TypeInstPtr* toop = el->is_instptr();
        if (toop->klass()->as_instance_klass()->unique_concrete_subklass()) {
          // If we load from "AbstractClass[]" we must see "ConcreteSubClass".
          const Type* subklass = Type::get_const_type(toop->klass());
          elemtype = subklass->join(el);
        }