[Bug tree-optimization/77362] [6/7 Regression] [graphite] ICE in sese_build_liveouts_use w/ -O2 -floop-nest-optimize

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77362

--- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> ---
Created attachment 40623
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=40623&action=edit
Patch candidate

The patch fixes issue, however I believe that PHI handling is in general broken
in graphite since r236440. This PR is very similar to PR71351. Both are
confused by PHI nodes created by LIM.