void instanceRefKlass::oop_push_contents(PSPromotionManager* pm, oop obj) {

  {- -------------------------------------------
  (1) instanceRefKlass::specialized_oop_push_contents() を呼び出すだけ.
      ---------------------------------------- -}

      if (UseCompressedOops) {
        specialized_oop_push_contents<narrowOop>(this, pm, obj);
      } else {
        specialized_oop_push_contents<oop>(this, pm, obj);
      }
    }