+/** set a description for local value n */
+void set_irg_loc_description(ir_graph *irg, int n, void *description);
+
+/** get the description for local value n */
+void *get_irg_loc_description(ir_graph *irg, int n);
+
+/** Returns a estimated node count of the irg. This count is updated
+ * after every irg_walk_graph().
+ */
+unsigned get_irg_estimated_node_cnt(const ir_graph *irg);
+
+/** Returns the last irn index for this graph. */
+unsigned get_irg_last_idx(const ir_graph *irg);
+
+/** Returns the floating point model of this graph. */
+unsigned get_irg_fp_model(const ir_graph *irg);
+
+/** Sets a floating point model for this graph. */
+void set_irg_fp_model(ir_graph *irg, unsigned model);
+