const char *get_irn_opname (const ir_node *node);
/** Get the ident for a string representation of the opcode. */
ident *get_irn_opident (const ir_node *node);
+/** If arg is an argument of the node, returns it's position, -1 otherwise */
+int get_irn_pred_pos (ir_node *node, ir_node *arg);
/** Gets the visited counter of a node. */
unsigned long get_irn_visited (const ir_node *node);
/** Sets the visited counter of a node. */