/**
* Solves the problem using a heuristic approach
+ * Uses the OU data structure
*/
int co_solve_heuristic(copy_opt_t *co);
/**
* Returns the maximal costs possible, i.e. the costs if all
* pairs would be assigned different registers.
+ * Uses the OU data structure
*/
int co_get_max_copy_costs(const copy_opt_t *co);
/**
* Returns the inevitable costs, i.e. the costs of
* all copy pairs which interfere.
+ * Uses the OU data structure
*/
int co_get_inevit_copy_costs(const copy_opt_t *co);
* Returns the current costs the copies are causing.
* The result includes inevitable costs and the costs
* of the copies regarding the current register allocation
+ * Uses the OU data structure
*/
int co_get_copy_costs(const copy_opt_t *co);
* Returns a lower bound for the costs of copies in this ou.
* The result includes inevitable costs and the costs of a
* minimal costs caused by the nodes of the ou.
+ * Uses the OU data structure
*/
int co_get_lower_bound(const copy_opt_t *co);
/**
* Solves the problem using mixed integer programming
* @returns 1 iff solution state was optimal
+ * NYI
*/
int co_solve_ilp1(copy_opt_t *co, double time_limit);
/**
* Solves the problem using mixed integer programming
* @returns 1 iff solution state was optimal
+ * Uses the OU and the GRAPH data structure
+ * Dependency of the OU structure can be removed
*/
int co_solve_ilp2(copy_opt_t *co, double time_limit);
/**
- * Checks if a node is optimizable, viz. has somthing to do with coalescing.
- * Uses the graph representation
+ * Checks if a node is optimizable, viz has something to do with coalescing.
+ * Uses the GRAPH data structure
*/
int co_gs_is_optimizable(copy_opt_t *co, ir_node *irn);