};
-/* Indexed by pseudo register number, gives the rtx for that pseudo.
- Allocated in parallel with regno_pointer_align.
- FIXME: We could put it into emit_status struct, but gengtype is not able to deal
- with length attribute nested in top level structures. */
+/* Indexed by register number, gives an rtx for that register (and only
+ that register). For pseudo registers, it is the unique rtx for
+ that pseudo. For hard registers, it is an rtx of the mode specified
+ by reg_raw_mode.
+
+ FIXME: We could put it into emit_status struct, but gengtype is not
+ able to deal with length attribute nested in top level structures. */
extern GTY ((length ("crtl->emit.x_reg_rtx_no"))) rtx * regno_reg_rtx;
extern int get_next_funcdef_no (void);
extern int get_last_funcdef_no (void);
+#ifdef HAVE_simple_return
+extern bool requires_stack_frame_p (rtx, HARD_REG_SET, HARD_REG_SET);
+#endif
+
/* In predict.c */
extern bool optimize_function_for_size_p (struct function *);
extern bool optimize_function_for_speed_p (struct function *);