* loop.c (insert_bct): Hide the definition of variables
        `increment_direction', `compare_direction', `add_iteration' and
        `loop_var_mode'.
        * recog.c (mode_dependent_address_p): Mark parameter `addr' with
        ATTRIBUTE_UNUSED.  Mark label `win' with ATTRIBUTE_UNUSED_LABEL.
        (mode_independent_operand): Mark label `lose' with
        ATTRIBUTE_UNUSED_LABEL.
        * regclass.c (n_occurrences): Remove prototype and definition.
        * reload.c (find_reloads_address_1): Mark variable `tem' with
        ATTRIBUTE_UNUSED.
        * reload1.c (reload): Cast the first two arguments of `bcopy' to PTR.
        * sbitmap.c (sbitmap_copy): Likewise.
        * scan-decls.c (scan_decls): Hide label `handle_comma'.
        * toplev.c (output_lang_identify): Mark prototype with
        ATTRIBUTE_UNUSED.
        * tree.c (make_node): Cast the first argument of `bzero' to PTR.
        (make_tree_vec): Likewise.
        (build1): Likewise.
        * varasm.c (assemble_static_space): Mark variable `tem' with
        ATTRIBUTE_UNUSED.

From-SVN: r24740