-void assure_constraints(be_irg_t *birg);
-void lower_nodes_after_ra(be_irg_t *birg, int do_copy);
+/**
+ * Walks over all nodes to assure register constraints.
+ *
+ * @param irg The graph
+ */
+void assure_constraints(ir_graph *irg);
+
+/**
+ * Walks over all blocks in an irg and performs lowering need to be
+ * done after register allocation (e.g. perm lowering).
+ *
+ * @param irg The graph
+ * @param do_copy 1 == resolve cycles with a free reg if available
+ */
+void lower_nodes_after_ra(ir_graph *irg, int do_copy);