e426c3a6cb
In some cases, we can end up with varying structs that aren't split to their member variables. nir_compact_varyings attempted to record these as unmovable, so it would leave them be. Unfortunately, it didn't do it right for non-vector/scalar types. It set the mask to: ((1 << (elements * dmul)) - 1) << var->data.location_frac where elements is the number of vector elements. For structures and other non-vector/scalars, elements is 0...so the whole mask became 0. This caused nir_compact_varyings to assign other varyings on top of the structure varying's location (as it appeared to take up no space). To combat this, we just set elements to 4 for non-vector/scalar types, so that the entire slot gets marked as unmovable. Fixes KHR-GL45.tessellation_shader.tessellation_control_to_tessellation_evaluation.gl_in on iris. Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
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