https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70251
--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> --- Thanks - I'm testing a fix for that and will adjust the match.pd patterns accordingly (without adding a cmp ? -1 : 0 -> VIEW_CONVERT_EXPR pattern). I verified the original aarch64 testcase still works after the change.
