https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84044
--- Comment #6 from Jan Hubicka <hubicka at ucw dot cz> ---
> > @@ -5150,15 +5145,9 @@ free_lang_data_in_type (tree type)
> > {
> > free_lang_data_in_binfo (TYPE_BINFO (type));
> > /* We need to preserve link to bases and virtual table for all
> > - polymorphic types to make devirtualization machinery working.
> > - Debug output cares only about bases, but output also
> > - virtual table pointers so merging of -fdevirtualize and
> > - -fno-devirtualize units is easier. */
> > - if ((!BINFO_VTABLE (TYPE_BINFO (type))
> > - || !flag_devirtualize)
> > - && ((!BINFO_N_BASE_BINFOS (TYPE_BINFO (type))
> > - && !BINFO_VTABLE (TYPE_BINFO (type)))
> > - || debug_info_level != DINFO_LEVEL_NONE))
> > + polymorphic types to make devirtualization machinery working.
> > */
> > + if (!BINFO_VTABLE (TYPE_BINFO (type))
> > + || !flag_devirtualize)
> > TYPE_BINFO (type) = NULL;
> > }
> > }
>
> Reverting this hunk makes the warning visible again.
Hmm, I will take a look. BIFOs are bit of a magic.
Thanks!
Honza
