-void lower_nodes_before_ra(be_chordal_env_t *chord_env);
-void lower_nodes_after_ra(be_chordal_env_t *chord_env, int do_copy);
+void assure_constraints(be_irg_t *birg);
+void lower_nodes_after_ra(be_chordal_env_t *chord_env, int do_copy, int do_stat);