Re: [PATCH v3 0/4] MR537: vkd3d-shader/ir: Expand index range write masks to cover all element masks.

[Conor McCarthy (＠cmccarthy)]

FXC is unpredicable and broken on the hull shader. For example, if I substitute `output.inside += f[tess_factor.x]` for `output.f = f[tess_factor.x]` it emits an error for dynamic indexing of `SV_Position`, but this doesn't happen for `output.edges[0] += f[tess_factor.x]`.

-- 
https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/537#note_56979