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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/109137] [12/13 regression] Compiling ffmpeg with -m32 on
 x86_64-pc-linux-gnu hangs on libavcodec/h264_cabac.c since
 r12-9086-g489c81db7d4f75
Date: Wed, 15 Mar 2023 09:00:54 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109137

--- Comment #10 from rguenther at suse dot de <rguenther at suse dot de> ---
On Wed, 15 Mar 2023, pinskia at gcc dot gnu.org wrote:

> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109137
>=20
> --- Comment #9 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
> (In reply to Richard Biener from comment #8)
> > Honza, the reporter uses -march=3Dznver1 - why did these backports affe=
ct
> > anything but zen4?
>=20
>=20
> (X86_TUNE_AVX256_MOVE_BY_PIECES): Add znver1-3.
> (X86_TUNE_AVX256_STORE_BY_PIECES): Add znver1-3.

But Zen1 uses a split AVX pipe so I'm not sure that's the best idea?

Anway, I'd revert this change completely on the branch and only
keep the znver4 effects.=