* dwarf2out.c (file_table, file_table_allocated): Remove.
        (file_table_allocated): Remove.
        (struct file_table): New.
        (decl_file_table, line_file_table): New.
        (print_dwarf_line_table): Use them.
        (size_of_line_prolog): Likewise.
        (output_line_info): Likewise.
        (add_src_coords_attributes): Likewise.
        (gen_subprogram_die): Likewise.
        (gen_variable_die): Likewise.
        (dwarf2out_add_library_unit_info): Likewise.
        (dwarf2out_line): Likewise.
        (lookup_filename): Take a struct file_table argument.
        (init_file_table): New.
        (dwarf2out_init): Use it.

From-SVN: r37746