https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96149
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
The two single-element interleaving cases are expected to be SLP vectorized
where the target needs a splat operation (permute of two doubles {0, 0}).
Ah, the reason is the aarch64 speciality that forces load/store-lanes ...
slp-46.c:17:3: note: can use vec_store_lanes<OI><V2DF>
slp-46.c:17:3: note: can use vec_load_lanes<OI><V2DF>
slp-46.c:17:3: missed: Built SLP cancelled: can use load/store-lanes
I don't think we have an effective target for this? So XFAIL for aarch64?
