* alpha.c: Include system.h and toplev.h.
(cint8_operand): Mark parameter `mode' with ATTRIBUTE_UNUSED.
(const48_operand): Likewise.
(mode_width_operand): Likewise.
(mode_mask_operand): Likewise.
(mul8_operand): Likewise.
(current_file_function_operand): Likewise.
(signed_comparison_operator): Likewise.
(divmod_operator): Likewise.
(any_memory_operand): Likewise.
(alpha_return_addr): Likewise for parameter `frame'.
(alpha_builtin_saveregs): Likewise for parameter `arglist'.
(vms_valid_decl_attribute_p): Likewise for parameters `decl' and
`attributes'.
(alpha_start_function): Likewise for parameter `decl'. Use
HOST_WIDE_INT_PRINT_DEC in call to fprintf. Fix various format
specifiers. Remove unused variables `lab' and `name'.
(alpha_end_function): Mark parameter `decl' with ATTRIBUTE_UNUSED.
(check_float_value): Likewise for parameter `overflow'.
(alpha_need_linkage): Likewise for parameters `name' and `is_local'.
* alpha.h (ASM_IDENTIFY_GCC, ASM_IDENTIFY_LANGUAGE): Define as
taking an argument.
(ASM_OUTPUT_SHORT): Cast argument to `int' in call to fprintf.
(ASM_OUTPUT_CHAR): Likewise.
(ASM_OUTPUT_BYTE): Likewise.
(PRINT_OPERAND_ADDRESS): Use HOST_WIDE_INT_PRINT_DEC in call to
fprintf.
(PUT_SDB_EPILOGUE_END): Mention argument `NAME' in definition.
Add prototypes for functions in alpha.c.
* alpha.md (ashldi3): Add default case in switch.