[llvm] [VectorCombine] Combine adjacent loads feeding as shuffle operands (PR #213007)

[Yingwei Zheng via llvm-commits]

https://github.com/dtcxzyw requested changes to this pull request.

A correctness issue was identified by [llvm-hackme](https://github.com/dtcxzyw/llvm-hackme). Please see the [issue comment](https://github.com/llvm/llvm-project/pull/213007#issuecomment-5250735974) for details.

https://github.com/llvm/llvm-project/pull/213007