* @file
* @brief iropt --- optimizations intertwined with IR construction -- private header.
* @author Martin Trapp, Christian Schaefer, Goetz Lindenmaier, Michael Beck
- * @version $Id$
*/
#ifndef FIRM_IR_IROPT_T_H
#define FIRM_IR_IROPT_T_H
}
/**
- * Sets the default operations for an ir_op_ops.
- *
- * @param code the opcode for the default operation
- * @param ops the operations initialized
- *
- * @return
- * The operations.
+ * returns true if a value becomes zero when converted to mode @p mode
*/
-ir_op_ops *firm_set_default_operations(unsigned code, ir_op_ops *ops);
+bool ir_zero_when_converted(const ir_node *node, ir_mode *dest_mode);
-/** NOTE: Survive DCE is considered a bad hack - don't use */
-typedef struct survive_dce_t survive_dce_t;
+int ir_mux_is_abs(const ir_node *sel, const ir_node *mux_false,
+ const ir_node *mux_true);
-/**
- * Make a new Survive DCE environment.
- * NOTE: Survive DCE is considered a bad hack - don't use
- */
-survive_dce_t *new_survive_dce(void);
+ir_node *ir_get_abs_op(const ir_node *sel, ir_node *mux_false,
+ ir_node *mux_true);
/**
- * Free a Survive DCE environment.
- * NOTE: Survive DCE is considered a bad hack - don't use
+ * 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.
*/
-void free_survive_dce(survive_dce_t *sd);
+bool ir_is_optimizable_mux(const ir_node *sel, const ir_node *mux_false,
+ const ir_node *mux_true);
/**
- * Register a node pointer to be patched upon DCE.
- * When DCE occurs, the node pointer specified by @p place will be
- * patched to the new address of the node it is pointing to.
- *
- * @param sd The Survive DCE environment.
- * @param place The address of the node pointer.
+ * Returns true if Conv_m0(Conv_m1( x_m2)) is equivalent to Conv_m0(x_m2)
*/
-void survive_dce_register_irn(survive_dce_t *sd, ir_node **place);
+bool may_leave_out_middle_conv(ir_mode *m0, ir_mode *m1, ir_mode *m2);
+
+void ir_register_opt_node_ops(void);
#endif