For non-explicit nir_lower_io, we use nir_deref_mode_is because there's
no way it works for generic pointers. For nir_lower_vars_to_explicit_types,
and nir_lower_explicit_io, we use nir_deref_mode_is_in_set to ensure we
never get type confusion. For generic pointers, this means that they
must be called with the full set of generic pointer modes.
Reviewed-by: Jesse Natalie <jenatali@microsoft.com>
Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6332>
9f3e3dfd2f