Eduardo Lima Mitev
9dd0cfafc9
This NIR->NIR pass implements offset computations that are currently done on the IR3 backend compiler, to give NIR a better chance of optimizing them. For now, it supports lowering the dword-offset computation for SSBO instructions. It will take an SSBO intrinsic and replace it with the new ir3-specific version that adds an extra source. That source will hold the SSA value resulting from inserting a division by 4 (an SHR op) of the original byte-offset source already provided by NIR in one of the intrinsic sources. Note that on a6xx the original byte-offset is not needed, so we could potentially replace that source instead of adding a new one. But to keep things simple and consistent we always add the new source and a6xx will just ignore the original one. Reviewed-by: Rob Clark <robdclark@gmail.com>
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