[Bug 93264] Tonga VM Faults since llvm ScheduleDAGInstrs: Rework schedule graph builder.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93264

--- Comment #2 from Andy Furniss <adf.lists at gmail.com> ---
Maybe there is some mesa that doesn't do it I suppose. I don't update llvm as
often as mesa so could have missed that.

When I noticed this I reset mesa back to where the old bug fixes went in, as I
knew that used to be good. It was still bad, then I tried it on older kernels,
still bad so I got back on head and started testing llvm.

On mesa head the llvm bisect does seem good - I haven't had much time, but a
few runs with llvm sitting on the bad were all bad and a few on the one before
all good. It was only a quick test - I didn't throw cpufreq into the mix. When
I saw the result of the bisect I did think red herring as it wasn't AMD - but
then was slightly relieved when AMD got a mention in the commit message.

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