-typedef struct _unit_t {
- struct list_head units; /**< chain for all units */
- copy_opt_t *co; /**< the copy_opt this unit belongs to */
- int interf; /**< number of nodes dropped due to interference */
- int node_count; /**< size of the nodes array */
- ir_node **nodes; /**< [0] is the root-node, others are non interfering args of it. */
- int ifg_mis_size; /**< size of a mis considering only ifg (not coloring conflicts) */