* dwarf2out.c (die_struct): Remove die_attr_last and die_child_last.
(add_dwarf_attr, add_child_die): Just push onto the front.
(reverse_die_lists): New fn.
(add_sibling_attributes): Use it.
(push_decl_scope): Reorganize.
(gen_struct_or_union_type_die): Don't add a DW_AT_containing_type
that points to ourself.
(add_name_and_src_coords_attributes): Don't set file and line for
an artificial decl.
(gen_subprogram_die): An artificial function doesn't need to match
file and line.
(gen_compile_unit_die): Return the generated die. Only add
AT_comp_dir if the filename is relative.
(remove_AT): Simplify loop. Also free string values.
(output_die): A DIE ref can't be null.
(output_value_format, value_format): Take a dw_attr_ref.
(dwarf_last_decl, is_extern_subr_die, sibling_offset): Remove.
(AT_class, AT_flag, AT_int, AT_unsigned, AT_string, AT_ref, AT_loc,
AT_addr, AT_lbl): New fns.
(various): Use them.
(various): Constify.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@30624
138bc75d-0d04-0410-961f-
82ee72b054a4