+#ifndef _IR_OP_TYPEDEF_
+#define _IR_OP_TYPEDEF_
+typedef struct ir_op ir_op;
+#endif
+
+extern ir_op *op_Block; ir_op *get_op_Block (void);
+
+extern ir_op *op_Start; ir_op *get_op_Start (void);
+extern ir_op *op_End; ir_op *get_op_End (void);
+extern ir_op *op_Jmp; ir_op *get_op_Jmp (void);
+extern ir_op *op_IJmp; ir_op *get_op_IJmp (void);
+extern ir_op *op_Cond; ir_op *get_op_Cond (void);
+extern ir_op *op_Return; ir_op *get_op_Return (void);
+extern ir_op *op_Sel; ir_op *get_op_Sel (void);
+
+extern ir_op *op_Const; ir_op *get_op_Const (void);
+extern ir_op *op_SymConst; ir_op *get_op_SymConst (void);
+
+extern ir_op *op_Call; ir_op *get_op_Call (void);
+extern ir_op *op_Add; ir_op *get_op_Add (void);
+extern ir_op *op_Sub; ir_op *get_op_Sub (void);
+extern ir_op *op_Minus; ir_op *get_op_Minus (void);
+extern ir_op *op_Mul; ir_op *get_op_Mul (void);
+extern ir_op *op_Quot; ir_op *get_op_Quot (void);
+extern ir_op *op_DivMod; ir_op *get_op_DivMod (void);
+extern ir_op *op_Div; ir_op *get_op_Div (void);
+extern ir_op *op_Mod; ir_op *get_op_Mod (void);
+extern ir_op *op_Abs; ir_op *get_op_Abs (void);
+extern ir_op *op_And; ir_op *get_op_And (void);
+extern ir_op *op_Or; ir_op *get_op_Or (void);
+extern ir_op *op_Eor; ir_op *get_op_Eor (void);
+extern ir_op *op_Not; ir_op *get_op_Not (void);
+extern ir_op *op_Cmp; ir_op *get_op_Cmp (void);
+extern ir_op *op_Shl; ir_op *get_op_Shl (void);
+extern ir_op *op_Shr; ir_op *get_op_Shr (void);
+extern ir_op *op_Shrs; ir_op *get_op_Shrs (void);
+extern ir_op *op_Rot; ir_op *get_op_Rot (void);
+extern ir_op *op_Conv; ir_op *get_op_Conv (void);
+extern ir_op *op_Cast; ir_op *get_op_Cast (void);
+extern ir_op *op_Carry; ir_op *get_op_Carry (void);
+extern ir_op *op_Borrow; ir_op *get_op_Borrow (void);
+
+extern ir_op *op_Phi; ir_op *get_op_Phi (void);
+
+extern ir_op *op_Load; ir_op *get_op_Load (void);
+extern ir_op *op_Store; ir_op *get_op_Store (void);
+extern ir_op *op_Alloc; ir_op *get_op_Alloc (void);
+extern ir_op *op_Free; ir_op *get_op_Free (void);
+
+extern ir_op *op_Sync; ir_op *get_op_Sync (void);
+
+extern ir_op *op_Tuple; ir_op *get_op_Tuple (void);
+extern ir_op *op_Proj; ir_op *get_op_Proj (void);
+extern ir_op *op_Id; ir_op *get_op_Id (void);
+extern ir_op *op_Bad; ir_op *get_op_Bad (void);
+extern ir_op *op_Confirm; ir_op *get_op_Confirm (void);
+
+extern ir_op *op_Unknown; ir_op *get_op_Unknown (void);
+extern ir_op *op_Filter; ir_op *get_op_Filter (void);
+extern ir_op *op_Break; ir_op *get_op_Break (void);
+extern ir_op *op_CallBegin; ir_op *get_op_CallBegin (void);
+extern ir_op *op_EndReg; ir_op *get_op_EndReg (void);
+extern ir_op *op_EndExcept; ir_op *get_op_EndExcept (void);
+
+extern ir_op *op_NoMem; ir_op *get_op_NoMem (void);
+extern ir_op *op_Mux; ir_op *get_op_Mux (void);
+extern ir_op *op_Psi; ir_op *get_op_Psi (void);
+extern ir_op *op_CopyB; ir_op *get_op_CopyB (void);
+
+extern ir_op *op_InstOf; ir_op *get_op_InstOf (void);
+extern ir_op *op_Raise; ir_op *get_op_Raise (void);
+extern ir_op *op_Bound; ir_op *get_op_Bound (void);
+
+extern ir_op *op_Pin; ir_op *get_op_Pin (void);
+
+/** Returns the ident for the opcode name */
+ident *get_op_ident(const ir_op *op);
+
+/** Returns the string for the opcode. */
+const char *get_op_name(const ir_op *op);
+
+/** Returns the enum for the opcode */
+opcode get_op_code(const ir_op *op);
+
+/** op_pin_state_pinned states */
+typedef enum {
+ op_pin_state_floats = 0, /**< Nodes of this opcode can be placed in any basic block. */
+ op_pin_state_pinned = 1, /**< Nodes must remain in this basic block. */
+ op_pin_state_exc_pinned, /**< Node must be remain in this basic block if it can throw an
+ exception, else can float. Used internally. */
+ op_pin_state_mem_pinned /**< Node must be remain in this basic block if it can throw an
+ exception or uses memory, else can float. Used internally. */
+} op_pin_state;
+
+const char *get_op_pin_state_name(op_pin_state s);
+
+/** gets pinned state of an opcode */
+op_pin_state get_op_pinned(const ir_op *op);
+
+/** Sets pinned in the opcode. Setting it to floating has no effect
+ for Block, Phi and control flow nodes. */
+void set_op_pinned(ir_op *op, op_pin_state pinned);
+
+/** Returns the next free IR opcode number, allows to register user ops */
+unsigned get_next_ir_opcode(void);
+
+/** Returns the next free n IR opcode number, allows to register a bunch of user ops */
+unsigned get_next_ir_opcodes(unsigned num);
+
+/**
+ * A generic function pointer.
+ */
+typedef void (*op_func)(void);
+
+/** The NULL-function. */
+#define NULL_FUNC ((generic_func)(NULL))
+
+/**
+ * Returns the generic function pointer from an ir operation.
+ */
+op_func get_generic_function_ptr(const ir_op *op);
+
+/**
+ * Store a generic function pointer into an ir operation.
+ */
+void set_generic_function_ptr(ir_op *op, op_func func);
+
+/**
+ * The compute value operation.
+ * This operation evaluates an IR node into a tarval if possible,
+ * returning tarval_bad otherwise.
+ */
+typedef tarval *(*computed_value_func)(ir_node *self);
+
+/**
+ * The equivalent node operation.
+ * This operation returns an equivalent node for the input node.
+ * It does not create new nodes. It is therefore safe to free self
+ * if the node returned is not self.
+ * If a node returns a Tuple we can not just skip it. If the size of the
+ * in array fits, we transform n into a tuple (e.g., possible for Div).
+ */
+typedef ir_node *(*equivalent_node_func)(ir_node *self);
+
+/**
+ * The transform node operation.
+ * This operation tries several [inplace] [optimizing] transformations
+ * and returns an equivalent node.
+ * The difference to equivalent_node() is that these
+ * transformations _do_ generate new nodes, and thus the old node must
+ * not be freed even if the equivalent node isn't the old one.
+ */
+typedef ir_node *(*transform_node_func)(ir_node *self);
+
+/**
+ * The node attribute compare operation.
+ * Compares the nodes attributes of two nodes of identical opcode
+ * and returns 0 if the attributes are identical, 1 if they differ.
+ */
+typedef int (*node_cmp_attr_func)(ir_node *a, ir_node *b);
+
+/**
+ * The reassociation operation.
+ * Called from a walker. Returns non-zero if
+ * a reassociation rule was applied.
+ * The pointer n is set to the newly created node, if some reassociation
+ * was applied.
+ */
+typedef int (*reassociate_func)(ir_node **n);
+
+/**
+ * The copy attribute operation.
+ * Copy the node attributes from a 'old' node to a 'new' one.
+ */
+typedef void (*copy_attr_func)(const ir_node *old_node, ir_node *new_node);
+
+/**
+ * The get_type operation.
+ * Return the type of the node self.
+ */
+typedef ir_type *(*get_type_func)(ir_node *self);
+
+/**
+ * The get_type_attr operation. Used to traverse all types that can be
+ * accessed from an ir_graph.
+ * Return the type attribute of the node self.
+ */
+typedef ir_type *(*get_type_attr_func)(ir_node *self);
+
+/**
+ * The get_entity_attr operation. Used to traverse all entities that can be
+ * accessed from an ir_graph.
+ * Return the entity attribute of the node self.
+ */
+typedef entity *(*get_entity_attr_func)(ir_node *self);
+
+/**
+ * The verify_node operation.
+ * Return non-zero if the node verification is ok, else 0.
+ * Depending on the node verification settings, may even assert.
+ *
+ * @see do_node_verification()
+ */
+typedef int (*verify_node_func)(ir_node *self, ir_graph *irg);
+
+/**
+ * The verify_node operation for Proj(X).
+ * Return non-zero if the node verification is ok, else 0.
+ * Depending on the node verification settings, may even assert.
+ *
+ * @see do_node_verification()
+ */
+typedef int (*verify_proj_node_func)(ir_node *self, ir_node *proj);
+
+/**
+ * Reasons to call the dump_node operation:
+ */
+typedef enum {
+ dump_node_opcode_txt, /**< dump the opcode */
+ dump_node_mode_txt, /**< dump the mode */
+ dump_node_nodeattr_txt, /**< dump node attributes to be shown in the label */
+ dump_node_info_txt /**< dump node attributes into info1 */
+} dump_reason_t;
+
+/**
+ * The dump_node operation.
+ * Writes several informations requested by reason to
+ * an output file
+ */
+typedef int (*dump_node_func)(ir_node *self, FILE *F, dump_reason_t reason);
+
+/**
+ * io_op Operations.
+ */