nir/liveness: Consider if uses in nir_ssa_defs_interfere

Fixes: f86902e75d9 "nir: Add an SSA-based liveness analysis pass"
Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/3428
Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Yevhenii Kharchenko <yevhenii.kharchenko@globallogic.com>
Reviewed-by: Connor Abbott <cwabbott0@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6824>
1 file changed