[llvm] [LoopBoundSplit] Fix edge connections during transformation (PR #192106)

[Congzhe Cao via llvm-commits]

================

----------------
CongzheUalberta wrote:

Thanks for the comment. Sure I can move it to right after "Replace exit branch target of pre-loop by post-loop's preheader."

https://github.com/llvm/llvm-project/pull/192106