https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114345
--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> --- Well, the shuffling in .LOAD_LANES will be a bit awkward to do, but sure. We basically lack "constant folding" of .LOAD_LANES and similarly of course we can't see through .STORE_LANES of a constant when later folding a scalar load from the same memory.