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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 regression] Compiling ffmpeg with -m32 on x86_64-pc-linux-gnu hangs on libavcodec/h264_cabac.c since r12-9086-g489c81db7d4f75
Date: Fri, 31 Mar 2023 07:21:52 +0000 [thread overview]
Message-ID: <bug-109137-4-0UUAnWQNgE@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-109137-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109137
--- Comment #23 from rguenther at suse dot de <rguenther at suse dot de> ---
On Thu, 30 Mar 2023, hubicka at gcc dot gnu.org wrote:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109137
>
> --- Comment #21 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
> Zen 1-3 changes were intentional in the original tuning patch (it is also
> briefly mentioned in the commit message). By allowing 256 bit AVX moves
> instead of 64bit integer moves (or 128bit) we can move bigger blocks of memory
> without loops and it was faster in micro-benchmarks I made on all zens, even on
> znver1.
> We also automatically go for 128bit moves when ISA allows that.
Sure, but this change is IMHO surprising for people on the branch so
I'd rather not do this.
next prev parent reply other threads:[~2023-03-31 7:21 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-15 0:30 [Bug c/109137] New: [12/13 " sam at gentoo dot org
2023-03-15 0:31 ` [Bug c/109137] " sam at gentoo dot org
2023-03-15 0:33 ` sam at gentoo dot org
2023-03-15 0:38 ` [Bug target/109137] " pinskia at gcc dot gnu.org
2023-03-15 0:40 ` pinskia at gcc dot gnu.org
2023-03-15 0:44 ` pinskia at gcc dot gnu.org
2023-03-15 0:58 ` sam at gentoo dot org
2023-03-15 1:06 ` pinskia at gcc dot gnu.org
2023-03-15 8:38 ` rguenth at gcc dot gnu.org
2023-03-15 8:42 ` pinskia at gcc dot gnu.org
2023-03-15 9:00 ` rguenther at suse dot de
2023-03-16 10:03 ` jakub at gcc dot gnu.org
2023-03-16 10:22 ` jakub at gcc dot gnu.org
2023-03-16 10:41 ` rguenther at suse dot de
2023-03-16 10:58 ` jakub at gcc dot gnu.org
2023-03-21 14:56 ` vmakarov at gcc dot gnu.org
2023-03-22 17:36 ` cvs-commit at gcc dot gnu.org
2023-03-23 16:25 ` jakub at gcc dot gnu.org
2023-03-23 18:15 ` [Bug target/109137] [12 " jakub at gcc dot gnu.org
2023-03-24 8:45 ` cvs-commit at gcc dot gnu.org
2023-03-24 13:10 ` vmakarov at gcc dot gnu.org
2023-03-30 15:16 ` hubicka at gcc dot gnu.org
2023-03-30 15:32 ` jakub at gcc dot gnu.org
2023-03-31 7:21 ` rguenther at suse dot de [this message]
2023-04-05 1:06 ` sjames at gcc dot gnu.org
2023-04-14 17:20 ` cvs-commit at gcc dot gnu.org
2023-04-14 17:23 ` hubicka at gcc dot gnu.org
2023-04-17 10:56 ` rguenth at gcc dot gnu.org
2023-05-08 12:26 ` rguenth at gcc dot gnu.org
2024-06-12 11:36 ` [Bug target/109137] " rguenth at gcc dot gnu.org
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