+/** Return true if parameter is a memory operation.
+ *
+ * A memory operation is an operation that directly changes the
+ * memory. I.e., a Load or a Store operation.
+ */
+int is_memop(ir_node *node);
+ir_node *get_memop_mem (ir_node *node);
+void set_memop_mem (ir_node *node, ir_node *mem);
+ir_node *get_memop_ptr (ir_node *node);
+void set_memop_ptr (ir_node *node, ir_node *ptr);
+