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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/109087] [13 Regression] csmith: end of year runtime bug
 since r13-4839-geef81eefcdc2a581
Date: Fri, 10 Mar 2023 17:02:05 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109087

--- Comment #8 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Martin Li=C5=A1ka from comment #7)
> With gcc pr109087.c -w -ftrivial-auto-var-init=3Dzero -g -O3 -march=3Dznv=
er3
> -fno-strict-aliasing -fno-tree-vectorize -fno-tree-slp-vectorize
> it started with r13-4839-geef81eefcdc2a581. That's strange, because I
> intentionally disable the vectorizer.

Could be exposed by the change to ix86_expand_set_or_cpymem or
ix86_reassociation_width then.

Or the change to X86_TUNE_AVX256_MOVE_BY_PIECES,
X86_TUNE_AVX256_STORE_BY_PIECES which adds znver3 to them ...=