[Bug tree-optimization/122493] is_eye in leela is not split because of empty basic block (merge_phi should be part of cfgcleanup instead of its own pass)

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122493

--- Comment #10 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
>+FAIL: gcc.dg/pr81165.c scan-tree-dump-not optimized " [/%] "

I fixed this by not removing forwarding blocks with phis until loops are there.
loops creation will cause the recreation of them but that can go wrong. Anyways
loop finding is done early (ethread which is the 3rd pass, only ccp and
forwprop are before).

The rest are still there ...