[llvm] [llvm][ScheduleDAG] SUnit::biasCriticalPath() does not find the criti... (PR #92368)

[via llvm-commits]

csstormq wrote:

> ppc AIX/Linux buildbots also fail at the same cases. https://lab.llvm.org/buildbot/#/builders/57/builds/35165 https://lab.llvm.org/buildbot/#/builders/214/builds/12263

@AtariDreams has addressed these broken unit tests. I would like to rebase our commits to one if possible.

https://github.com/llvm/llvm-project/pull/92368