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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/110963] [14 Regression] Dead Code Elimination
 Regression since r14-2946-g46c8c225455
Date: Thu, 10 Aug 2023 12:20:13 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D110963

--- Comment #6 from rguenther at suse dot de <rguenther at suse dot de> ---
On Thu, 10 Aug 2023, theodort at inf dot ethz.ch wrote:

> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D110963
>=20
> --- Comment #5 from Theodoros Theodoridis <theodort at inf dot ethz.ch> -=
--
> (In reply to Richard Biener from comment #4)
> > Alternatively you can put __attribute__((hot)) on 'main' which we other=
wise
> > consider cold.  Maybe that's a good idea for future DCE regression sear=
ches?
>=20
>=20
> Thanks for the feedback. IIRC, I have reported at least one more case whe=
re
> renaming 'main' would make the issue go away. So if adding __attribute__(=
(hot))
> makes sense, then I'll include it when searching.

I think it makes sense, it properly distinguishes -Os from -O2 where
otherwise those would behave too similar.=