arg = get_irg_arg(get_entity_irg(q->ent), q->pos);
/* we will replace the argument in position "q->pos" by this constant. */
const_arg = new_r_Const_type(
arg = get_irg_arg(get_entity_irg(q->ent), q->pos);
/* we will replace the argument in position "q->pos" by this constant. */
const_arg = new_r_Const_type(