On Wednesday, August 29, 2018 10:11:48 AM PDT Jason Ekstrand wrote: > This commit moves our storage image format conversion codegen into NIR > instead of doing it in the back-end. This has the advantage of letting > us run it through NIR's optimizer which is pretty effective at shrinking > things down. In the common case of rgba8, the number of instructions > emitted after NIR is done with it is half of what it was with the > lowering happening in the back-end. On the downside, the back-end's > lowering is able to directly use predicates and the NIR lowering has to > use IFs. > > Shader-db results on Kaby Lake: > > total instructions in shared programs: 15166910 -> 15166872 (<.01%) > instructions in affected programs: 5895 -> 5857 (-0.64%) > helped: 15 > HURT: 0 > > Clearly, we don't have that much image_load_store happening in the > shaders in shader-db....
Looks like the untyped stride checks are back and the unnecessary typed load checks (mistakenly copied from atomics) are gone. Nice. Reviewed-by: Kenneth Graunke <kenn...@whitecape.org>
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