extern enum machine_mode mode_wider_mode[];
#define GET_MODE_WIDER_MODE(MODE) (mode_wider_mode[(int)(MODE)])
+/* Return the mode for data of a given size SIZE and mode class CLASS.
+ If LIMIT is nonzero, then don't use modes bigger than MAX_FIXED_MODE_SIZE.
+ The value is BLKmode if no other mode is found. */
+
+extern enum machine_mode mode_for_size ();
+
/* Find the best mode to use to access a bit field. */
extern enum machine_mode get_best_mode ();