[PATCH 0/7] MR698: Draft: vkd3d-shader/ir: Introduce a better CFG structurizer, part 4.

[Giovanni Mascellani (＠giomasce)]

This applies on top of !672, the last three commits belong here.

Here we compute additional "synthetic" loops that will be used to implement non-trivial forward edges using (possibly conditional) `break` instructions.