+int get_irn_loop_call_depth(ir_node *n);
+/** Return loop depth of node.
+ *
+ * Returns the loop depth of n in the control flow. I.e., we
+ * go from the node to the block to the loop the block is in,
+ * and return its depth. */
+int get_irn_cfloop_depth(ir_node *n);
+int get_irn_recursion_depth(ir_node *n);