Warning fixes:

Warning fixes:
        * 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.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@20737 138bc75d-0d04-0410-961f-82ee72b054a4