[PATCH v2 0/1] MR590: vkd3d-shader/dxil: Support forward-referenced value ids.

[Conor McCarthy (＠cmccarthy)]

This is relevant to the structuriser because branched DXIL can sometimes contain forward refs. It doesn't need to be implemented in the backend until necessary, but it adds a parameter to `register_init_ssa_vector()` and `register_init_ssa_scalar()` so it's convenient to add before further use of those functions.

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  v2: vkd3d-shader/dxil: Support forward-referenced value ids.

https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/590