[llvm] [VectorCombine] Allow shuffling with bitcast for not multiple offset for loadsize (PR #119139)

[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/119139#issuecomment-4648109240) for details.

https://github.com/llvm/llvm-project/pull/119139