agx: Fix subdivision coalescing
As intended. We can't CSE with partial null destinations in the way, so we
shouldn't eliminate dead destinations until after CSE has run. But we should
still eliminate dead instructions to ensure CSE doesn't move things around
needlessly, hurting register pressure.
Noticed while debugging live range splitting.
No GLES3.0 shader-db changes.
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21674>
projects / platform / upstream / mesa.git / commit