[llvm] Apply the `AdjustICmpImmAndPred` optimization when it results in a one-instruction immediate materialization over a two-instruction materialization. (PR #83218)

[David Green via llvm-commits]

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

Thanks for the update. LGTM if @ornata doesn't disagree.

https://github.com/llvm/llvm-project/pull/83218