[PATCH v9 0/4] MR672: vkd3d-shader/ir: Introduce a better CFG structurizer, part 3.

[Giovanni Mascellani (＠giomasce)]

~~This applies on top of !662, the last four commits belong here.~~

Here we compute a topological order (plus some additional properties) of the shader blocks. Eventually the blocks will be emitted precisely in this order, after having been enriched with structured control flow information.

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  v9: vkd3d-shader/ir: Keep loops contiguous in the topological sort.
      vkd3d-shader/ir: Dump the topological order of the control flow graph.
      vkd3d-shader/ir: Topologically sort the control flow graph.
      vkd3d-shader/ir: Allow adding to a block list without checking for duplicates.
 
https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/672