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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/110874] [14 Regression] ice with -O2 with recent gcc
Date: Wed, 02 Aug 2023 20:17:08 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D110874

--- Comment #7 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to David Binderman from comment #6)
> (In reply to Andrew Pinski from comment #4)
> > There is a stack overflow while executing the FRE pass.
>=20
> I can confirm over 100,000 stack frames.
>=20
> Which -f flag causes the FRE pass to be executed ?
> I assume it is in -O2, but not in -O1.

Fre is enabled at -O1 but the IR changes before fre. I have not looked into
what changes to the IR on why there is a difference between -O1 and -O2 yet=
.=