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Otherwise we may be left with such casts: vec1 32 ssa_72 = deref_var &shadow_map (uniform sampler2D) vec1 32 ssa_73 = deref_cast (texture2D *)ssa_72 (uniform texture2D) vec1 32 ssa_74 = deref_cast (sampler *)ssa_72 (uniform sampler) vec1 32 ssa_76 = (float32)tex ssa_73 (texture_deref), ssa_74 (sampler_deref), ssa_75 (coord), ssa_64 (comparator) And crash in ycbcr lowering since we aren't able to follow deref chain. Fixes crash in GFXBench Aztec Ruins Vulkan tests. See issue: https://gitlab.freedesktop.org/mesa/mesa/-/issues/5945 Cc: mesa-stable Signed-off-by: Danylo Piliaiev <dpiliaiev@igalia.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14819>