+/** move Proj nodes into the same block as its predecessors */
+void normalize_proj_nodes(ir_graph *irg);
+
+/** 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);
+
+/**
+ * Access custom graph data.
+ * The data must have been registered with
+ * register_additional_graph_data() before.
+ * @param graph The graph to get the data from.
+ * @param type The type of the data you registered.
+ * @param off The value returned by register_additional_graph_data().
+ * @return A pointer of type @p type.
+ */
+#define get_irg_data(graph,type,off) \
+ (assert(off > 0 && "Invalid graph data offset"), (type *) ((char *) (graph) - (off)))
+
+/**
+ * Get the pointer to the node some custom data belongs to.
+ * @param data The pointer to the custom data.
+ * @param off The number as returned by register_additional_graph_data().
+ * @return A pointer to the ir node the custom data belongs to.
+ */
+#define get_irg_data_base(data,off) \
+ (assert(off > 0 && "Invalid graph data offset"), (ir_graph *) ((char *) (data) + (off)))
+
+/**
+ * Request additional data to be allocated with an ir graph.
+ * @param size The size of the additional data required.
+ * @return A positive number, if the operation was successful, which
+ * must be passed to the access macro get_irg_data(), 0 if the
+ * registration failed.
+ */
+size_t register_additional_graph_data(size_t size);
+