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

[rguenth at gcc dot gnu.org]

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

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Do rotates have the same issue with undefinednes as shifts?  With shifts it's
whether the CPU interprets out-of-bound values as modulo the size or not but
with rotates this wouldn't make any difference?

The tree.def comments indicate out-of-bound values invoke undefined behavior.