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Emma Anholt authored
We had an approximation that was assuming any ddx or tex instruction needed helper invocations, but that's not true for texelFetch() or textureSize(). It also meant that we were setting PIXLOD on vertex and compute shaders doing texturing, which doesn't really make sense. shader-db (with a hack to log pixlod): total pixlod in shared programs: 582 -> 573 (-1.55%) Closes: mesa/mesa#2681 Tested-by: Marge Bot <mesa/mesa!4308> Part-of: <mesa/mesa!4308>
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