+typedef enum {
+ pn_be_Call_M_regular = pn_Call_M_regular, /**< The memory result of a be_Call. */
+ pn_be_Call_sp = pn_Call_max,
+ pn_be_Call_first_res /**< The first result proj number of a be_Call. */
+} pn_be_Call;
+
+/**
+ * Construct a new be_Call.
+ *
+ * @param dbg debug info
+ * @param irg the graph where the call is placed
+ * @param bl the block where the call is placed
+ * @param mem the memory input of the call
+ * @param sp the stack pointer input of the call
+ * @param ptr the address of the called function, if immediate call set to sp
+ * @param n_outs the number of outcoming values from this call
+ * @param n the number of (register) inputs of this call
+ * @param in the (register) inputs of this call
+ * @param call_tp the call type of this call
+ */
+ir_node *be_new_Call(dbg_info *dbg, ir_graph *irg, ir_node *bl, ir_node *mem, ir_node *sp, ir_node *ptr,
+ int n_outs, int n, ir_node *in[], ir_type *call_tp);
+
+/**
+ * Position numbers for the be_Return inputs.
+ */
+enum {
+ be_pos_Return_mem = 0, /**< memory input of a be_Return node */
+ be_pos_Return_sp = 1, /**< stack pointer input of a be_Return node */
+ be_pos_Return_val = 2, /**< first "real" return value if any */
+};
+
+/**
+ * Construct a new be_Return.
+ *
+ * @param dbg debug info
+ * @param irg the graph where the new node will be placed
+ * @param bl the block where the new node will be placed
+ * @param n_res number of "real" results
+ * @param n number of inputs
+ * @param pop pop number of bytes on return
+ * @param in input array
+ */
+ir_node *be_new_Return(dbg_info *dbg, ir_graph *irg, ir_node *bl, int n_res, unsigned pop, int n, ir_node *in[]);
+
+/** Returns the number of real returns values */
+int be_Return_get_n_rets(const ir_node *ret);
+
+/**
+ * Return the number of bytes that should be popped from stack when executing the Return.
+ *
+ * @param ret the be_Return node
+ */
+unsigned be_Return_get_pop(const ir_node *ret);
+
+/**
+ * Return non-zero, if number of popped bytes must be always emitted.
+ *
+ * @param ret the be_Return node
+ */
+int be_Return_get_emit_pop(const ir_node *ret);
+
+/**
+ * Set the emit_pop flag.
+ *
+ * @param ret the be_Return node
+ */
+void be_Return_set_emit_pop(ir_node *ret, int emit_pop);
+
+/** appends a node to the return node, returns the position of the node */
+int be_Return_append_node(ir_node *ret, ir_node *node);
+
+ir_node *be_new_RegParams(ir_graph *irg, ir_node *bl, int n_out);
+
+ir_node *be_new_Barrier(ir_graph *irg, ir_node *bl, int n, ir_node *in[]);
+
+/**
+ * Appends a node to a barrier, returns the result proj of the node
+ */
+ir_node *be_Barrier_append_node(ir_node *barrier, ir_node *node);
+
+/**
+ * Make a spill node.
+ *
+ * @param irn The node to be spilled.
+ * @param spill_ctx The context in which the spill is introduced (This is mostly == irn up to the case of Phis).
+ * @return The new spill node.
+ */
+ir_node *be_spill(ir_node *block, ir_node *irn);
+
+/**
+ * Make a reload and insert it into the schedule.
+ *
+ * @param cls The register class of the reloaded value.
+ * @param insert The node in the schedule in front of which the reload is inserted.
+ * @param mode The mode of the original (spilled) value.
+ * @param spill The spill node corresponding to this reload.
+ * @return A freshly made reload.
+ */
+ir_node *be_reload(const arch_register_class_t *cls, ir_node *insert, ir_mode *mode, ir_node *spill);
+
+enum {
+ be_pos_CopyKeep_op = 0
+};
+ir_node *be_new_CopyKeep(const arch_register_class_t *cls, ir_graph *irg, ir_node *bl, ir_node *src, int n, ir_node *in_keep[], ir_mode *mode);
+ir_node *be_new_CopyKeep_single(const arch_register_class_t *cls, ir_graph *irg, ir_node *bl, ir_node *src, ir_node *keep, ir_mode *mode);
+ir_node *be_get_CopyKeep_op(const ir_node *cpy);
+void be_set_CopyKeep_op(ir_node *cpy, ir_node *op);
+
+/**
+ * Position numbers for the be_Unwind inputs.
+ */
+enum {
+ be_pos_Unwind_mem = 0, /**< memory input of a be_Unwind node */
+ be_pos_Unwind_sp = 1, /**< stack pointer input of a be_Unwind node */
+};
+
+/**
+ * Construct a new be_Unwind.
+ *
+ * @param dbg debug info
+ * @param irg the graph where the new node will be placed
+ * @param bl the block where the new node will be placed
+ * @param mem the memory input
+ * @param sp the stack pointer input
+ */
+ir_node *be_new_Unwind(dbg_info *dbg, ir_graph *irg, ir_node *bl, ir_node *mem, ir_node *sp);
+
+ir_node *be_get_Unwind_mem(const ir_node *irn);
+ir_node *be_get_Unwind_sp(const ir_node *irn);
+
+/**
+ * Get the backend opcode of a backend node.
+ * @param irn The node.
+ * @return The backend opcode.
+ */
+#define be_get_irn_opcode(irn) get_irn_opcode(irn)
+
+/**
+ * Returns the frame entity of a be node.
+ * Try to avoid this function and better call arch_get_frame_entity!
+ *
+ * @return the frame entity used by the be node
+ */
+ir_entity *be_get_frame_entity(const ir_node *irn);
+
+/**
+ * Returns the frame offset of this node.
+ */
+int be_get_frame_offset(const ir_node *irn);
+
+ir_node* be_get_Reload_mem(const ir_node *irn);
+ir_node *be_get_Reload_frame(const ir_node *irn);
+ir_node* be_get_Spill_val(const ir_node *irn);
+ir_node *be_get_Spill_frame(const ir_node *irn);
+
+void be_set_MemPerm_in_entity(const ir_node *irn, int n, ir_entity* ent);
+ir_entity *be_get_MemPerm_in_entity(const ir_node *irn, int n);
+
+void be_set_MemPerm_out_entity(const ir_node *irn, int n, ir_entity* ent);
+ir_entity *be_get_MemPerm_out_entity(const ir_node *irn, int n);
+
+int be_get_MemPerm_entity_arity(const ir_node *irn);
+
+/**
+ * Impose a register constraint on a backend node.
+ * @param irn The node.
+ * @param pos The position of the argument.
+ * @param reg The register which is admissible for that node, argument/result and position.
+ */
+void be_set_constr_single_reg_in(ir_node *irn, int pos,
+ const arch_register_t *reg, arch_register_req_type_t additional_flags);
+void be_set_constr_single_reg_out(ir_node *irn, int pos,
+ const arch_register_t *reg, arch_register_req_type_t additional_flags);
+
+/**
+ * Impose register constraints on a backend node.
+ * The register subsets given by the limited function in @p req are copied to the backend node.
+ * This requires that the constraint type of the @p req is arch_register_req_type_limited.
+ * @param irn The backend node.
+ * @param pos The position (@see be_set_constr_single_reg()).
+ * @param req The register requirements which shall be transferred.
+ */
+void be_set_constr_limited(ir_node *irn, int pos, const arch_register_req_t *req);
+
+/**
+ * Set the register class of a node.
+ * @param irn The node itself.
+ * @param pos The position (0..n) for arguments
+ * @param flags The register class to set for that node and position.
+ */
+void be_node_set_reg_class_in(ir_node *irn, int pos, const arch_register_class_t *cls);
+void be_node_set_reg_class_out(ir_node *irn, int pos, const arch_register_class_t *cls);
+
+/**
+ * Set the register requirement type of a node.
+ * @param irn The node itself.
+ * @param pos The position (0..n) for arguments, (-1..-m) for results.
+ * @param flags The register requirement type to set for that node and position.
+ */
+void be_node_set_req_type(ir_node *irn, int pos, arch_register_req_type_t type);
+
+/**
+ * Initialize the Phi handler.
+ */
+void be_phi_handler_new(void);
+
+/**
+ * Destroy the Phi handler.
+ */
+void be_phi_handler_free(void);
+
+/**
+ * Reset the register data in the Phi handler.
+ * This should be called on each new graph and deletes the register information of the current graph.
+ */
+void be_phi_handler_reset(void);
+
+/**
+ * Set the register requirements for a phi node.
+ */
+void be_set_phi_reg_req(ir_node *phi, const arch_register_req_t *req,
+ arch_register_req_type_t additional_types);
+
+/**
+ * irn handler for common be nodes and Phi's.
+ */
+const void *be_node_get_irn_ops(const ir_node *irn);
+
+static inline int be_is_Spill (const ir_node *irn) { return get_irn_opcode(irn) == beo_Spill ; }
+static inline int be_is_Reload (const ir_node *irn) { return get_irn_opcode(irn) == beo_Reload ; }
+static inline int be_is_Copy (const ir_node *irn) { return get_irn_opcode(irn) == beo_Copy ; }
+static inline int be_is_CopyKeep (const ir_node *irn) { return get_irn_opcode(irn) == beo_CopyKeep ; }
+static inline int be_is_Perm (const ir_node *irn) { return get_irn_opcode(irn) == beo_Perm ; }
+static inline int be_is_MemPerm (const ir_node *irn) { return get_irn_opcode(irn) == beo_MemPerm ; }
+static inline int be_is_Keep (const ir_node *irn) { return get_irn_opcode(irn) == beo_Keep ; }
+static inline int be_is_Call (const ir_node *irn) { return get_irn_opcode(irn) == beo_Call ; }
+static inline int be_is_Return (const ir_node *irn) { return get_irn_opcode(irn) == beo_Return ; }
+static inline int be_is_IncSP (const ir_node *irn) { return get_irn_opcode(irn) == beo_IncSP ; }
+static inline int be_is_AddSP (const ir_node *irn) { return get_irn_opcode(irn) == beo_AddSP ; }
+static inline int be_is_SubSP (const ir_node *irn) { return get_irn_opcode(irn) == beo_SubSP ; }
+static inline int be_is_RegParams(const ir_node *irn) { return get_irn_opcode(irn) == beo_RegParams; }
+static inline int be_is_FrameAddr(const ir_node *irn) { return get_irn_opcode(irn) == beo_FrameAddr; }
+static inline int be_is_Barrier (const ir_node *irn) { return get_irn_opcode(irn) == beo_Barrier ; }
+static inline int be_is_Unwind (const ir_node *irn) { return get_irn_opcode(irn) == beo_Unwind ; }