[PATCH v8 0/2] MR59: vkd3d-shader/hlsl: Avoid infinite loop in copy propagation.

[Francisco Casas (＠fcasas)]

copy_propagation_transform_object_load() currently retrieves true, which
indicates that there was progress, even if the input dereference remains
the same.

This can happen repeatedly if an uninitialized object is copied onto
itself, as in the tests added in this patch. This results on the
compilation getting stuck on an endless loop.

This patch checks if the deref didn't change, to retrieve false in that
case.

--
  v8: vkd3d-shader/hlsl: Avoid infinite loop and invalid derefs in copy-prop.

https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/59