[llvm] [SLP] Fix crash on extractelement with out-of-bounds index.....Fixes … (PR #176918)

[Alexey Bataev via llvm-commits]

https://github.com/alexey-bataev requested changes to this pull request.

I don't think you need to change somuch code, just function change should be enough

https://github.com/llvm/llvm-project/pull/176918