-#ifdef TREE_CODE
-extern void mn10300_va_start PARAMS ((int, tree, rtx));
-#endif /* TREE_CODE */
-
-extern struct rtx_def *legitimize_address PARAMS ((rtx, rtx, enum machine_mode));
-extern void print_operand PARAMS ((FILE *, rtx, int));
-extern void print_operand_address PARAMS ((FILE *, rtx));
-extern void mn10300_print_reg_list PARAMS ((FILE *, int));
-extern int mn10300_get_live_callee_saved_regs PARAMS ((void));
-extern void mn10300_gen_multiple_store PARAMS ((int));
-extern void notice_update_cc PARAMS ((rtx, rtx));
-extern enum reg_class secondary_reload_class PARAMS ((enum reg_class,
- enum machine_mode, rtx));
-extern char *output_tst PARAMS ((rtx, rtx));
-extern int store_multiple_operation PARAMS ((rtx, enum machine_mode));
-extern int symbolic_operand PARAMS ((rtx, enum machine_mode));
-extern int call_address_operand PARAMS ((rtx, enum machine_mode));
-extern int impossible_plus_operand PARAMS ((rtx, enum machine_mode));
-extern int const_8bit_operand PARAMS ((rtx, enum machine_mode));
-
-extern int mn10300_address_cost PARAMS ((rtx, int *));
+extern void mn10300_override_options (void);
+extern rtx legitimize_pic_address (rtx, rtx);
+extern int legitimate_pic_operand_p (rtx);
+extern void print_operand (FILE *, rtx, int);
+extern void print_operand_address (FILE *, rtx);
+extern void mn10300_print_reg_list (FILE *, int);
+extern int mn10300_get_live_callee_saved_regs (void);
+extern void mn10300_gen_multiple_store (int);
+extern void notice_update_cc (rtx, rtx);
+extern enum reg_class mn10300_secondary_reload_class (enum reg_class,
+ enum machine_mode, rtx);
+extern const char *output_tst (rtx, rtx);
+extern int store_multiple_operation (rtx, enum machine_mode);
+extern int symbolic_operand (rtx, enum machine_mode);
+extern int impossible_plus_operand (rtx, enum machine_mode);
+
+extern bool mn10300_wide_const_load_uses_clr (rtx operands[2]);
+
+extern bool mn10300_function_value_regno_p (const unsigned int);