[Bug c/47939] Missing DW_TAG_typedef for qualified types

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47939

--- Comment #5 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-03-01 15:41:53 UTC ---
The patch bootstrapped and tested ok.  Removing

  if (!flag_gen_aux_info && (TYPE_QUALS (element_type)))
    type = TYPE_MAIN_VARIANT (type);

unconditionally breaks gcc.dg/array-quals-2.c (but nothing else).

Whether that is a bug or such radical fix is wrong remains to be determined.

Changing types based on flag_gen_aux_info definitely looks wrong.

Probably a better general approach would be to make c_build_qualified_type
also take a desired name as argument instead of using TYPE_NAME.