Kenneth Graunke
bc3bb28645
System values are built-in uniforms. We set them up as UBO values, and might pull or push them. UBO push analysis will take care of that. We only want to enable push constants if there's an actual range being pushed. Otherwise, we might get into a scenario where 3DSTATE_PS enables push constants but 3DSTATE_CONSTANT_PS isn't pushing anything. This fixes GPU hangs in Broadwell image load store tests which have unused image param system values but no other uniforms. (We shouldn't be making those anyway, but that's a separate fix...)
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