[Bug tree-optimization/81165] Regression in GCC-8.0.0's optimizer

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81165

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Hard to tell the difference but trunk seems to miss some jump threading after
loop opts.