[llvm] [ValueTracking] Fix "getOperand() out of range!" assertion crash (PR #87482)

[Nikita Popov via llvm-commits]

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

Already fixed by https://github.com/llvm/llvm-project/pull/90489, removing this from the review queue...

https://github.com/llvm/llvm-project/pull/87482