src/share/vm/oops/klass.hpp

*** 306,315 ****
--- 306,317 ----
      _lh_array_tag_shift         = BitsPerInt - _lh_array_tag_bits,
      _lh_array_tag_type_value    = ~0x00,  // 0xC0000000 >> 30
      _lh_array_tag_obj_value     = ~0x01   // 0x80000000 >> 30
    };
  
+   static const juint _lh_array_bit = 1 << (BitsPerInt - 1); // 0x80000000
+ 
    static int layout_helper_size_in_bytes(jint lh) {
      assert(lh > (jint)_lh_neutral_value, "must be instance");
      return (int) lh & ~_lh_instance_slow_path_bit;
    }
    static bool layout_helper_needs_slow_path(jint lh) {