https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107196
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #9 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Sergei Trofimovich from comment #8)
> I confirm that today's master does not exhibit the failure. Bisecting to the
> fix ends up at this fix:
>
> commit c9b840db504d15db01f06fe1fec38282dbafee07
> Author: Aldy Hernandez <al...@redhat.com>
> Date: Mon Oct 17 18:56:24 2022 +0200
>
> Make sure exported range for SSA post-dominates the DEF in
> set_global_ranges_from_unreachable_edges.
>
> The problem here is that we're exporting a range for an SSA range that
> happens on the other side of a __builtin_unreachable, but the SSA does
> not post-dominate the definition point. This is causing ivcanon to
> unroll things incorrectly.
>
> This was a snafu when converting the code from evrp.
>
> PR tree-optimization/107293
>
> Looks plausible?
Yes because that patch fixes the problem from the patch which you had
originally bisect the issue down to.
So just closing as a dup of bug 107293.
*** This bug has been marked as a duplicate of bug 107293 ***
