*** old/src/share/vm/opto/subnode.cpp	Wed May  8 18:17:27 2013
--- new/src/share/vm/opto/subnode.cpp	Wed May  8 18:17:27 2013

*** 861,874 ****
--- 861,875 ----
  const Type *CmpNNode::sub( const Type *t1, const Type *t2 ) const {
    const TypePtr *r0 = t1->make_ptr(); // Handy access
    const TypePtr *r1 = t2->make_ptr();
  
    // Undefined inputs makes for an undefined result
!   if( TypePtr::above_centerline(r0->_ptr) ||
!       TypePtr::above_centerline(r1->_ptr) )
!   if ((r0 == NULL) || (r1 == NULL) ||
!       TypePtr::above_centerline(r0->_ptr) ||
+       TypePtr::above_centerline(r1->_ptr)) {
      return Type::TOP;
  
+   }
    if (r0 == r1 && r0->singleton()) {
      // Equal pointer constants (klasses, nulls, etc.)
      return TypeInt::CC_EQ;
    }