[Bug libfortran/79956] [7 Regression] many new -Wmaybe-uninitialized warnings with bootstrap-O3

["marxin at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79956

--- Comment #37 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to rguenther@suse.de from comment #8)
> On March 8, 2017 4:43:05 PM GMT+01:00, "marxin at gcc dot gnu.org"
> <gcc-bugzilla@gcc.gnu.org> wrote:
> >https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79956
> >
> >--- Comment #7 from Martin Liška <marxin at gcc dot gnu.org> ---
> >I can also see profiledbootstrap failure in:
> >
> >.././../gcc/simplify-rtx.c:6021:12: error: ‘result_s’ may be used
> >uninitialized
> >in this function [-Werror=maybe-uninitialized]
> >     return result_s;
> >            ^~~~~~~~
> >
> >It worked with a revision from 3.3.2017, is it the same issue as seen
> >by
> >Markus?
> 
> I've run into this as well but it's slightly non reproducible (repeating the
> compile command sometimes works, sometimes not).  From analyzing it looked
> similar and/or threading related.
> 
> Richard.

Good, after couple builds it popped up again. Would it be fine to initialize
the variable to NULL to prevent it?