Coverity notices that `nir_get_io_index_src_number` could return -1, and
that we use it to index an array. It cannot understand that -1 only
happens for unhandled enum values, but all of these are handled. Add an
assert to help it out.
CID: 1667234
Fixes: 37a9c5411f ("brw: serialize messages on Gfx12.x if required")
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/38007>
Dylan Baker
a5b9f428f9