[llvm] InstSimplify: lookthru casts, binops in folding shuffles (PR #92668)

[Nikita Popov via llvm-commits]

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

You cannot RAUW inside InstSimplify. InstSimplify is an analysis, it cannot change IR in any way.

https://github.com/llvm/llvm-project/pull/92668