+/**
+ * Returns the associated tarval of a node.
+ */
+static inline ir_tarval *value_of(const ir_node *n)
+{
+ return value_of_ptr(n);
+}
+
+/**
+ * returns true if a value becomes zero when converted to mode @p mode
+ */
+bool ir_zero_when_converted(const ir_node *node, ir_mode *dest_mode);
+
+int ir_mux_is_abs(const ir_node *sel, const ir_node *mux_false,
+ const ir_node *mux_true);
+
+ir_node *ir_get_abs_op(const ir_node *sel, ir_node *mux_false,
+ ir_node *mux_true);
+
+/**
+ * return true if the Mux node will be optimized away. This can be used for
+ * the if-conversion callback. Allowing these Muxes should be always safe, even
+ * if the backend cannot handle them.
+ */
+bool ir_is_optimizable_mux(const ir_node *sel, const ir_node *mux_false,
+ const ir_node *mux_true);
+
+/**
+ * Set the default hash operation in an ir_op_ops.
+ *
+ * @param code the opcode for the default operation
+ * @param ops the operations initialized
+ */
+void firm_set_default_hash(unsigned code, ir_op_ops *ops);
+
+/**
+ * Set the default computed_value evaluator in an ir_op_ops.
+ *
+ * @param code the opcode for the default operation
+ * @param ops the operations initialized
+ */
+void firm_set_default_computed_value(ir_opcode code, ir_op_ops *ops);
+
+/**
+ * Sets the default equivalent node operation for an ir_op_ops.
+ *
+ * @param code the opcode for the default operation
+ * @param ops the operations initialized
+ */
+void firm_set_default_equivalent_node(ir_opcode code, ir_op_ops *ops);
+
+/**
+ * Sets the default transform node operation for an ir_op_ops.
+ *
+ * @param code the opcode for the default operation
+ * @param ops the operations initialized
+ */
+void firm_set_default_transform_node(ir_opcode code, ir_op_ops *ops);
+
+/**
+ * Set the default node attribute compare operation for an ir_op_ops.
+ *
+ * @param code the opcode for the default operation
+ * @param ops the operations initialized
+ */
+void firm_set_default_node_cmp_attr(ir_opcode code, ir_op_ops *ops);