[Bug tree-optimization/121559] ccp does not do copy prop when there is bit info

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121559

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
I'll note backwards walks are always worse also when folding since you'll fold
operations on unfolded expressions.