[Mesa-dev] [PATCH 2/2] ac, radeonsi: reduce optimizations for complex compute shaders on older APUs

Dave Airlie airlied at gmail.com
Fri Jul 20 04:53:17 UTC 2018

On 20 July 2018 at 13:12, Marek Olšák <maraeo at gmail.com> wrote:
> From: Marek Olšák <marek.olsak at amd.com>
> To make dEQP-GLES31.functional.ssbo.layout.random.all_shared_buffer.23
> finish sooner on the older CPUs. (otherwise it gets killed and we fail
> the test)

I think this is possibly a bad idea, since it's clear LLVM has some pathalogical
behaviour the AMDGPU backend for this shader and we are just papering over it.

A quick dig into LLVM shows horrible misuse of a SmallVector data structure
for what ends up having 2000 entries in it.

I'm not going to out right NAK this, but it would be nice to have it accompanied
by a pointer to an llvm bug against the amdgpu backend for the
pathalogical case.


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