[Bug tree-optimization/108440] rotate optimization may introduce new UB

[kristerw at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108440

--- Comment #3 from Krister Walfridsson <kristerw at gcc dot gnu.org> ---
Hmm. I think this is the "Y equal to B case" from bug 106523. I.e., the bugfix
is not correct...