Connor Abbott
3a2ea2af9d
Right now nir_copy_prop_vars is effectively undoing nir_lower_io_to_temporaries for inputs by propagating the original variable through the copy created in lower_io_to_temporaries. A theoretical variable coalescing pass would have the same issue with output variables, although that doesn't exist yet. To fix this, add a new bit to nir_variable, and disable copy propagation when it's set. This doesn't seem to affect any drivers now, probably since since no one uses lower_io_to_temporaries for inputs as well as copy_prop_vars, but it will fix radv once we flip on lower_io_to_temporaries for fs inputs. Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
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