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From: "segher at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/109858] [14 Regression] r14-172 caused some
 SPEC2017 bmk to degrade on Power
Date: Wed, 17 May 2023 14:48:51 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109858

--- Comment #10 from Segher Boessenkool <segher at gcc dot gnu.org> ---
(In reply to Hongtao.liu from comment #8)
> (In reply to Segher Boessenkool from comment #7)
> > > The patch will still use GENERAL_REGS when hard_regno_mode_ok for mod=
e and
> > > GENERAL_REGS(which is the case in PR109610), hope it can also fix this
> > > regression.
> >=20
> > That sounds more reasonable.  But, why use any heuristics like this?  C=
an't
> > you
> > just look at the actual costs of using mem and regs?
>=20
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109610#c2

That is not an answer to my question at all?=