[Bug tree-optimization/89247] [7/8/9 Regression] ICE in expand_LOOP_VECTORIZED, at internal-fn.c:2409

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89247

--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #8)
> Or fold LOOP_VECTORIZED into 0 in fold_builtins pass just in case something
> makes it through?
> Could fix PR87446 too.

Yeah, though the whole point was to see if we properly update during
vectorization - if we simply "fold" later we lose this sanity check.  I'm
currently testing a fix in if-conversion itself.