2a4e4477fc
Figuring out what "shapes" of clauses are kosher happens during scheduling, not packing, but shouldn't distract the scheduler. So let's add a new file for these sorts of questions. Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5260>