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From: "juergen.reuter at desy dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/110311] [14 Regression] regression in
 tree-optimizer
Date: Sat, 01 Jul 2023 08:09:39 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D110311

--- Comment #44 from J=C3=BCrgen Reuter <juergen.reuter at desy dot de> ---
(In reply to anlauf from comment #43)
> Mabye the fprem issue was a red herring from the beginning, pointing to a
> problem in a different place.
>=20
> I recompiled each module in a loop with -O0 until the FPE went away.
>=20
> instances_sub.f90 seems the file someone wants to look at.
>=20
> Works at -O0, -O1, -Os, -O2 -fno-tree-vectorize
> Fails at -O2, -O3
>=20
> on x86_64-pc-linux-gnu.
>=20
> J=C3=BCrgen: can you reduce this even more with this information?

Thanks, this info is helpful. So it is the setting up of the full process v=
ia
the instances module, which is in agreement with the fact that the simple t=
est
with only the RNG did not fail. I will be busy for several days, but hopefu=
lly
in a week from now, I'll know more.=