/* iterate over a list of ir_nodes linked by link field */
#define foreach_linked_irns(head, iter) for ((iter) = (head); (iter); (iter) = get_irn_link((iter)))
/* iterate over a list of ir_nodes linked by link field */
#define foreach_linked_irns(head, iter) for ((iter) = (head); (iter); (iter) = get_irn_link((iter)))