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

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csstormq wrote:

> Looks like a straightforward fix to me. Is there any way to add a unit test?

Thanks, @atrick . I have added a test in X86 target, as you suggested. Please review again, thank you.

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