[llvm] [X86] Add missed type extension and truncation during combine (PR #67168)

[Evgenii Kudriashov via llvm-commits]

e-kud wrote:

> Please can you pre-commit the tests so we can see the codegen diff?

Sure. They are here https://github.com/llvm/llvm-project/pull/68219. If they are ok, I rebase after merge.

https://github.com/llvm/llvm-project/pull/67168