+/**
+ * Dumps the IFG of the program splitting after each instruction in the Appel format.
+ * @param co The copy opt object.
+ * @param f The file to dump to.
+ */
+void co_dump_appel_graph_cliques(const copy_opt_t *co, FILE *f);
+/**
+ * Dump the interference graph with the affinity edges and the coloring.
+ * @param co The copy opt structure.
+ * @param f The file to dump to.
+ * @param flags The dump flags (see enum above).
+ */
+void co_dump_ifg_dot(const copy_opt_t *co, FILE *f, unsigned flags);