The csel-ladder we have in bi_lower_load_push_const_with_dyn_offset()
is not great, and is relying on base/range being valid. It turns out
nir_lower_mem_access_bit_sizes(), which we rely on to make push constant
accesses 32-bit aligned, doesn't preserve those when splitting accesses.
Let's simplify the thing by lowering push constant accesses with a
dynamic offset to global loads.
We also reset the base and offset values in the lowering pass, to make
sure the backend doesn't rely on them for other things.
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Chia-I Wu <olvaffe@gmail.com>
Reviewed-by: Mary Guillemard <mary.guillemard@collabora.com>
Reviewed-by: Lars-Ivar Hesselberg Simonsen <lars-ivar.simonsen@arm.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/32415>
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