[Bug tree-optimization/78335] Fold ~(1 << x) -> (~1 lrotate_expr x) on GIMPLE

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78335

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Hmm, not sure if we want to expose rotates for this particular case (rotates
are generally not well handled by passes).