nir_lower_pack can generate split operations, execute algebraic again
to handle them.
This fix an assert on
"dEQP-VK.spirv_assembly.instruction.compute.opphi.vartype_float16" and
probably others tests.
Fixes: 3904cfabd6 ("bi: Use nir_opt_load_store_vectorize")
Signed-off-by: Mary Guillemard <mary.guillemard@collabora.com>
Reviewed-by: John Anthony <john.anthony@arm.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/32131>
e5d64ca69c