[Bug tree-optimization/84646] Missed optimisation for hoisting conditions outside nested loops

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84646

--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
I'm testing a patch removing the premature rejection of the cycle in the
backwards threader but will leave the cancellation code for now.