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From: "pthaugen at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/103734] IPA-CP opportunity for imagick in SPECCPU 2017
Date: Fri, 17 Dec 2021 17:23:39 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103734

pthaugen at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |pthaugen at gcc dot gnu.org

--- Comment #3 from pthaugen at gcc dot gnu.org ---
(In reply to Hongtao.liu from comment #2)
> (In reply to Tamar Christina from comment #0)
> > When using --param ipa-cp-eval-threshold=3D1 --param ipa-cp-unit-growth=
=3D20 on
> > imagick the hot functions MorphologyApply and GetVirtualPixelsFromNexus=
 get
> > replaced by specialized versions that are much smaller and faster.
> >=20
> > Some other benchmarks like leela also get very small uplifts but the im=
agick
> > one is worth 14%.  Both flags seem to be needed.
>=20
> Observe similar thing on ICX with -param=3Dinline-min-speedup=3D3

I tested on a Power9 system and see the following improvements:

--param ipa-cp-eval-threshold=3D1 --param ipa-cp-unit-growth=3D20 : +5%

-param=3Dinline-min-speedup=3D3 : +30%=