7f4e36ff7d
This is a prerequisite for enabling nir_opt_varyings for all gallium drivers. nir_lower_io_passes (called by the GLSL linker) only uses NIR options to lower indirect IO access before lowering IO and calling nir_opt_varyings. Most drivers report full support for indirect IO and lower it themselves, which prevents compaction of lowered indirectly accessed varyings because nir_opt_varyings doesn't touch indirect varyings. Acked-by: Alyssa Rosenzweig <alyssa@rosenzweig.io> (Rb for asahi) Reviewed-by: Pavel Ondračka <pavel.ondracka@gmail.com> (for r300) Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/32423>