+/**
+ * Copies simply all attributes stored in the old node to the new node.
+ * Assumes both have the same opcode and sufficient size.
+ *
+ * @param old_node the old node from which the attributes are read
+ * @param new_node the new node to which the attributes are written
+ */
+void default_copy_attr(const ir_node *old_node, ir_node *new_node);
+
+/**
+ * Returns the attribute size of nodes of this opcode.
+ * @note Use not encouraged, internal feature.
+ */
+static inline size_t get_op_attr_size (const ir_op *op) {
+ return op->attr_size;
+}
+
+/**
+ * Returns non-zero if op is a control flow opcode,
+ * like Start, End, Jmp, Cond, Return, Raise or Bad.
+ */
+static inline int is_op_cfopcode(const ir_op *op) {
+ return op->flags & irop_flag_cfopcode;
+}
+
+/**
+ * Returns non-zero if the operation manipulates interprocedural control flow:
+ * CallBegin, EndReg, EndExcept
+ */
+static inline int is_ip_cfopcode(const ir_op *op) {
+ return op->flags & irop_flag_ip_cfopcode;
+}
+
+/** Returns non-zero if operation is commutative */
+static inline int is_op_commutative(const ir_op *op) {
+ return op->flags & irop_flag_commutative;
+}
+
+/** Returns non-zero if operation is fragile */
+static inline int is_op_fragile(const ir_op *op) {
+ return op->flags & irop_flag_fragile;
+}
+
+/** Returns non-zero if operation is forking control flow */
+static inline int is_op_forking(const ir_op *op) {
+ return op->flags & irop_flag_forking;
+}
+
+/** Returns non-zero if operation is a high-level op */
+static inline int is_op_highlevel(const ir_op *op) {
+ return op->flags & irop_flag_highlevel;
+}
+
+/** Returns non-zero if operation is a const-like op */
+static inline int is_op_constlike(const ir_op *op) {
+ return op->flags & irop_flag_constlike;
+}
+
+static inline int is_op_uses_memory(const ir_op *op) {
+ return op->flags & irop_flag_uses_memory;
+}
+
+/** Returns non-zero if operation must always be optimized */
+static inline int is_op_always_opt(const ir_op *op) {
+ return op->flags & irop_flag_always_opt;
+}
+
+/** Returns non-zero if operation is a keep-like op */
+static inline int is_op_keep(const ir_op *op) {
+ return op->flags & irop_flag_keep;
+}
+
+/** Returns non-zero if operation must always be placed in the start block. */
+static inline int is_op_start_block_placed(const ir_op *op) {
+ return op->flags & irop_flag_start_block;
+}
+
+/** Returns non-zero if operation is a machine operation */
+static inline int is_op_machine(const ir_op *op) {
+ return op->flags & irop_flag_machine;
+}
+
+/** Returns non-zero if operation is a machine operand */
+static inline int is_op_machine_operand(const ir_op *op) {
+ return op->flags & irop_flag_machine_op;