src/share/vm/opto/library_call.cpp

*** 2422,2431 ****
--- 2422,2433 ----
      if ((bt == T_OBJECT) != (type == T_OBJECT)) {
        // Don't intrinsify mismatched object accesses
        return false;
      }
      mismatched = (bt != type);
+   } else if (alias_type->adr_type() == TypeOopPtr::BOTTOM) {
+     mismatched = true; // conservatively mark all "wide" on-heap accesses as mismatched
    }
  
    // First guess at the value type.
    const Type *value_type = Type::get_const_basic_type(type);