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From: "bergner at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/94393] Powerpc suboptimal 64-bit constant comparison
Date: Mon, 13 Jul 2020 15:49:15 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D94393

--- Comment #5 from Peter Bergner <bergner at gcc dot gnu.org> ---
(In reply to Alan Modra from comment #3)
> There are two parts to fixing this PR.
> 1) We can do better in the sequences generated for some constants.
> 2) rs6000_rtx_costs needs to be accurate, so that expensive constants are
> put in memory and stay there with optimisation.
>=20
> Having looked at part 2 a little, I'd say fixes for that are definitely n=
ot
> stage 4 material.

Alan, I think you pushed some changes to help with 1) above, correct?
Is there more to do for 1)?

As for 2), we're in stage1 now.  Do you have ideas about what must be done
there?  Do we still want to do something for 2)?=