nir: Add a structurizer
v2 (Karol):
renamed pathes to paths
use more bool
use _mesa_set_intersects
deduplicated some code
fixed some typos
v3 (Karol):
don't enable structurizer as we do this in vtn now
v4 (Jason):
A few clean-ups due to unstructured NIR changes
v5 (Jason):
Misc whitespace and style cleanups
Signed-off-by: Karol Herbst <kherbst@redhat.com>
Tested-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/2401>