+copy_attrs(const ir_node *old_node, ir_node *new_node);
+
+
+/** Returns the array with the ins. The content of the array may not be
+ changed. */
+ir_node **get_irn_in (const ir_node *node);
+
+/** @{ */
+/** access attributes directly */
+INLINE const_attr get_irn_const_attr (ir_node *node);
+INLINE long get_irn_proj_attr (ir_node *node);
+INLINE alloc_attr get_irn_alloc_attr (ir_node *node);
+INLINE type *get_irn_free_attr (ir_node *node);
+INLINE symconst_attr get_irn_symconst_attr (ir_node *node);
+type *get_irn_call_attr (ir_node *node);
+type *get_irn_funccall_attr (ir_node *node);
+sel_attr get_irn_sel_attr (ir_node *node);
+int get_irn_phi_attr (ir_node *node);
+block_attr get_irn_block_attr (ir_node *node);
+load_attr get_irn_load_attr (ir_node *node);
+store_attr get_irn_store_attr (ir_node *node);
+except_attr get_irn_except_attr (ir_node *node);
+/** @} */
+
+/*-------------------------------------------------------------------*/
+/* These function are most used in libfirm. Give them as static */
+/* functions so they can be inlined. */
+/*-------------------------------------------------------------------*/
+
+/**
+ * Checks whether a pointer points to a ir node.
+ * Intern version for libFirm.
+ */
+static INLINE int
+__is_ir_node (const void *thing) {
+ return (get_kind(thing) == k_ir_node);
+}
+
+/**
+ * Gets the op of a node.
+ * Intern version for libFirm.
+ */
+static INLINE ir_op *
+__get_irn_op (const ir_node *node)
+{
+ assert (node);
+ return node->op;
+}
+
+/**
+ * Gets the opcode of a node.
+ * Intern version for libFirm.
+ */
+static INLINE opcode
+__get_irn_opcode (const ir_node *node)
+{
+ assert (k_ir_node == get_kind(node));
+ assert (node -> op);
+ return node->op->code;
+}
+
+/**
+ * Returns the number of predecessors without the block predecessor.
+ * Intern version for libFirm.
+ */
+static INLINE int
+__get_irn_intra_arity (const ir_node *node) {
+ assert(node);
+ return ARR_LEN(node->in) - 1;
+}
+
+/**
+ * Returns the number of predecessors without the block predecessor.
+ * Intern version for libFirm.
+ */
+static INLINE int
+__get_irn_inter_arity (const ir_node *node) {
+ assert(node);
+ if (__get_irn_opcode(node) == iro_Filter) {
+ assert(node->attr.filter.in_cg);
+ return ARR_LEN(node->attr.filter.in_cg) - 1;
+ } else if (__get_irn_opcode(node) == iro_Block && node->attr.block.in_cg) {
+ return ARR_LEN(node->attr.block.in_cg) - 1;
+ }
+ return __get_irn_intra_arity(node);
+}
+
+/**
+ * Returns the number of predecessors without the block predecessor.
+ * Intern version for libFirm.
+ */
+static INLINE int
+__get_irn_arity (const ir_node *node) {
+ if (interprocedural_view) return __get_irn_inter_arity(node);
+ return __get_irn_intra_arity(node);
+}
+
+/**
+ * Intern version for libFirm.
+ */
+static INLINE ir_node *
+__get_irn_intra_n (ir_node *node, int n) {
+ return (node->in[n + 1] = skip_Id(node->in[n + 1]));
+}
+
+/**
+ * Intern version for libFirm.
+ */
+static INLINE ir_node*
+__get_irn_inter_n (ir_node *node, int n) {
+ /* handle Filter and Block specially */
+ if (__get_irn_opcode(node) == iro_Filter) {
+ assert(node->attr.filter.in_cg);
+ return (node->attr.filter.in_cg[n + 1] = skip_Id(node->attr.filter.in_cg[n + 1]));
+ } else if (__get_irn_opcode(node) == iro_Block && node->attr.block.in_cg) {
+ return (node->attr.block.in_cg[n + 1] = skip_Id(node->attr.block.in_cg[n + 1]));
+ }
+
+ return __get_irn_intra_n (node, n);
+}
+
+/**
+ * Access to the predecessors of a node.
+ * To iterate over the operands iterate from 0 to i < get_irn_arity(),
+ * to iterate including the Block predecessor iterate from i = -1 to
+ * i < get_irn_arity.
+ * If it is a block, the entry -1 is NULL.
+ * Intern version for libFirm.
+ */
+static INLINE ir_node *
+__get_irn_n (ir_node *node, int n) {
+ assert(node); assert(-1 <= n && n < __get_irn_arity(node));
+ if (interprocedural_view) return __get_irn_inter_n (node, n);
+ return __get_irn_intra_n (node, n);
+}
+
+/**
+ * Gets the mode of a node.
+ * Intern version for libFirm.
+ */
+static INLINE ir_mode *
+__get_irn_mode (const ir_node *node)
+{
+ assert (node);
+ return node->mode;
+}
+
+/**
+ * Sets the mode of a node.
+ * Intern version of libFirm.
+ */
+static INLINE void
+__set_irn_mode (ir_node *node, ir_mode *mode)
+{
+ assert (node);
+ node->mode = mode;
+}
+
+/**
+ * Gets the visited counter of a node.
+ * Intern version for libFirm.
+ */
+static INLINE unsigned long
+__get_irn_visited (const ir_node *node)
+{
+ assert (node);
+ return node->visited;
+}
+
+/**
+ * Sets the visited counter of a node.
+ * Intern version for libFirm.
+ */
+static INLINE void
+__set_irn_visited (ir_node *node, unsigned long visited)
+{
+ assert (node);
+ node->visited = visited;
+}
+
+/**
+ * Mark a node as visited in a graph.
+ * Intern version for libFirm.
+ */
+static INLINE void
+__mark_irn_visited (ir_node *node) {
+ assert (node);
+ node->visited = current_ir_graph->visited;
+}
+
+/**
+ * Returns non-zero if a node of was visited.
+ * Intern version for libFirm.
+ */
+static INLINE int
+__irn_visited(const ir_node *node) {
+ assert (node);
+ return (node->visited >= current_ir_graph->visited);
+}
+
+/**
+ * Returns non-zero if a node of was NOT visited.
+ * Intern version for libFirm.
+ */
+static INLINE int
+__irn_not_visited(const ir_node *node) {
+ assert (node);
+ return (node->visited < current_ir_graph->visited);
+}