https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110515
--- Comment #7 from Sergei Trofimovich <slyfox at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #6)
> Turning off PRE also allows it to pass but I guess it's the same as with SRA.
> -fno-strict-aliasing also helps, -fno-ipa-modref doesn't. I suspect
> bisection
> isn't going to help much, but maybe it points to a small set of changes on
> the testcase itself.
Bisect landed on the r12-4790-g4b3a325f07aceb :
$ git bisect bad
4b3a325f07acebf47e82de227ce1d5ba62f5bcae is the first bad commit
commit 4b3a325f07acebf47e82de227ce1d5ba62f5bcae
Author: Aldy Hernandez <al...@redhat.com>
Date: Thu Oct 28 15:35:21 2021 +0200
Remove VRP threader passes in exchange for better threading pre-VRP.
