[Mesa-dev] [PATCH 05/11] intel/compiler: Use null destination register for memory fence messages

[Matt Turner]

On Wed, Mar 21, 2018 at 2:56 PM, Francisco Jerez <currojerez at riseup.net> wrote:
> Matt Turner <mattst88 at gmail.com> writes:
>
>> From Message Descriptor section in gfxspecs:
>>
>>   "Memory fence messages without Commit Enable set do not return
>>    anything to the thread (response length is 0 and destination
>>    register is null)."
>>
>> This fixes a GPU hang in simulation in the piglit test
>> arb_shader_image_load_store-shader-mem-barrier
>>
>
> On what platform?

I'm pretty sure Anuj found this in ICL. I'll revert this patch from my
branch and try to confirm.