+/** Returns true if a node is an Anchor node */
+int is_Anchor(const ir_node *node);
+/** Returns true if a node is a Borrow node */
+int is_Borrow(const ir_node *node);
+/** Returns true if a node is a Break node */
+int is_Break(const ir_node *node);
+/** Returns true if a node is an instff node */
+int is_InstOf(const ir_node *node);