[llvm] [X86] isGuaranteedNotToBeUndefOrPoison - add simple target shuffles with known test coverage (PR #161553)

[Björn Pettersson via llvm-commits]

https://github.com/bjope approved this pull request.

Need to say that I'm not that familiar with the details for all these X86ISD nodes. The patch looks good to me, but maybe you want a second opinion from someone more experienced with X86.

https://github.com/llvm/llvm-project/pull/161553