+/** Gets the direction from a IncSP node. */
+be_stack_dir_t be_get_IncSP_direction(const ir_node *irn);
+
+/** Gets the call entity or NULL if this is no static call. */
+entity *be_Call_get_entity(const ir_node *call);
+/** Sets the call entity. */
+void be_Call_set_entity(ir_node *call, entity *ent);
+/** Gets the call type. */
+ir_type *be_Call_get_type(ir_node *call);
+/** Sets the call type. */
+void be_Call_set_type(ir_node *call, ir_type *call_tp);
+
+/**
+ * Position numbers for the be_Call inputs.
+ */
+enum {
+ be_pos_Call_mem = 0, /**< memory input of a be_Call node */
+ be_pos_Call_sp = 1, /**< stack pointer input of a be_Call node */
+ be_pos_Call_ptr = 2, /**< call pointer input of a be_Call node */
+ be_pos_Call_first_arg = 3 /**< first argument input of a be_Call node */
+};
+
+/**
+ * Projection numbers for result of be_Call node: use for Proj nodes!
+ */
+typedef enum {
+ pn_be_Call_M_regular = pn_Call_M_regular, /**< The memory result of a be_Call. */
+ pn_be_Call_first_res = pn_Call_max /**< The first result proj number of a be_Call. */
+} pn_be_Call;
+
+/**
+ * Construct a new be_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 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 in input array
+ */
+ir_node *be_new_Return(dbg_info *dbg, ir_graph *irg, ir_node *bl, int n_res, int n, ir_node *in[]);
+
+/** Returns the number of real returns values */
+int be_Return_get_n_rets(ir_node *ret);
+
+/**
+ * Construct a new Stack Parameter node.
+ */
+ir_node *be_new_StackParam(const arch_register_class_t *cls, const arch_register_class_t *cls_frame, ir_graph *irg, ir_node *bl, ir_mode *mode, ir_node *frame_pointer, entity *ent);
+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[]);
+
+/**
+ * Make a spill node.
+ *
+ * @param arch_env The architecture environment.
+ * @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(const arch_env_t *arch_env, ir_node *irn, ir_node *spill_ctx);
+
+/**
+ * Make a reload and insert it into the schedule.
+ *
+ * @param arch_env The architecture environment.
+ * @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_env_t *arch_env, 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);
+
+/**
+ * Get the backend opcode of a backend node.
+ * @param irn The node.
+ * @return The backend opcode.
+ */
+be_opcode_t be_get_irn_opcode(const ir_node *irn);
+
+int be_is_Spill(const ir_node *irn);
+int be_is_Reload(const ir_node *irn);
+int be_is_Copy(const ir_node *irn);
+int be_is_Perm(const ir_node *irn);
+int be_is_Keep(const ir_node *irn);
+int be_is_CopyKeep(const ir_node *irn);
+int be_is_Call(const ir_node *irn);
+int be_is_Return(const ir_node *irn);
+int be_is_IncSP(const ir_node *irn);
+int be_is_SetSP(const ir_node *irn);
+int be_is_AddSP(const ir_node *irn);
+int be_is_RegParams(const ir_node *irn);
+int be_is_StackParam(const ir_node *irn);
+int be_is_FrameAddr(const ir_node *irn);
+int be_is_FrameLoad(const ir_node *irn);
+int be_is_FrameStore(const ir_node *irn);
+int be_is_Barrier(const ir_node *irn);
+
+/**
+ * Get the entity on the stack frame the given node uses.
+ * @param irn The node.
+ * @return The entity on the stack frame used by the node or NULL,
+ * if the node does not access the stack frame or is no back-end node.
+ *
+ */
+entity *be_get_frame_entity(const ir_node *irn);
+
+void be_set_Spill_entity(ir_node *irn, entity *ent);
+entity *be_get_spill_entity(const ir_node *irn);
+
+void be_set_Spill_context(ir_node *irn, ir_node *ctx);
+ir_node *be_get_Spill_context(const ir_node *irn);
+
+
+ir_node* be_get_Reload_mem(const ir_node *irn);
+ir_node* be_get_Reload_frame(const ir_node* irn);
+
+/**
+ * Set the entities of a Reload to the ones of the Spill it is pointing to.
+ * @param irg The graph.
+ */
+void be_copy_entities_to_reloads(ir_graph *irg);
+
+/**
+ * Impose a register constraint on a backend node.
+ * @param irn The node.
+ * @param pos The position of the argument/result. Results range from -1..-m and arguments form 0..n
+ * @param reg The register which is admissible for that node, argument/result and position.
+ */
+void be_set_constr_single_reg(ir_node *irn, int pos, const arch_register_t *reg);
+
+/**
+ * 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 flags of a node.
+ * @param irn The node itself.
+ * @param pos The position (0..n) for arguments, (-1..-m) for results.
+ * @param flags The flags to set for that node and position.
+ */
+void be_node_set_flags(ir_node *irn, int pos, arch_irn_flags_t flags);
+
+/**
+ * Set the register class of a node.
+ * @param irn The node itself.
+ * @param pos The position (0..n) for arguments, (-1..-m) for results.
+ * @param flags The register class to set for that node and position.
+ */
+void be_node_set_reg_class(ir_node *irn, int pos, const arch_register_class_t *cls);
+
+/**
+ * Make a new phi handler.
+ * @param env The architecture environment.
+ * @return A new phi handler.
+ */
+arch_irn_handler_t *be_phi_handler_new(const arch_env_t *arch_env);
+
+/**
+ * Free a phi handler.
+ * @param handler The handler to free.
+ */
+void be_phi_handler_free(arch_irn_handler_t *handler);
+
+/**
+ * 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(arch_irn_handler_t *handler);
+
+/**
+ * irn handler for common be nodes.
+ */
+extern const arch_irn_handler_t be_node_irn_handler;