* pa-protos.h: New file.

        * pa.c: Include recog.h and tm_p.h.
        (compute_zdepwi_operands, compute_movstrsi_length,
        remove_useless_addtr_insns, store_reg, load_reg, set_reg_plus_d,
        find_addr_reg, import_milli): Add static prototypes.
        (pa_cpu_string, pa_arch_string): Constify a char*.
        (legitimize_pic_address): Pass argument `mode' to pic_label_operand.
        (read_only_operand): Add argument `mode'.
        (singlemove_string, output_move_double, output_fp_move_double,
        output_block_move, output_and, output_ior, output_ascii,
        remove_useless_addtr_insns, milli_names, output_mul_insn,
        output_div_insn, output_mod_insn, output_arg_descriptor,
        output_cbranch, output_bb, output_bvb, output_dbra, ,
        output_millicode_call, output_call, hppa_encode_label,
        output_parallel_movb, output_parallel_addb): Constify a char*.
        (hppa_va_start): Mark parameter `stdarg_p' with ATTRIBUTE_UNUSED.
        (output_parallel_addb): Remove extra arg to `constrain_operands'

        * pa.h:  Move all prototypes to pa-protos.h.
        (pa_cpu_string, pa_arch_string): Constify a char*.
        (LEGITIMIZE_ADDRESS): Call `symbolic_operand' with mode argument.

        * pa.md: Call `function_label_operand' with mode argument.
        Likewise for `read_only_operand'.
        Fix nesting of parens in call to `symbolic_operand'.

From-SVN: r31331