nir: document order requirement for nir_lower_viewport_transform
This requirement is currently satisfied by the usage in panfrost and lima. Signed-off-by: Benjamin Lee <benjamin.lee@collabora.com> Reviewed-by: Erik Faye-Lund <erik.faye-lund@collabora.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/32084>
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@@ -34,7 +34,8 @@
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* "Coordinate Transformation" of the OpenGL ES 3.2 full specification.
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*
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* This pass must run before lower_vars/lower_io such that derefs are
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* still in place.
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* still in place. This pass must run after lower_io_to_temporaries so
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* that the transformed position is not visible to user code.
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*/
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#include "nir/nir.h"
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