[llvm] [InstCombine] Fix for folding `select` into floating point binary operators. (PR #83200)

[Paul Osmialowski via llvm-commits]

pawosm-arm wrote:

I'd need to know if such change makes sense before working on a PR with a proper test case.  Namely, is obtaining information from `TVI` the right thing to do when `SI` doesn't seem to have it. It could be the state of noNaNs flag has been deliberately stripped from `SI`, and reading it from `TVI` is just sweeping whatever happened to `SI` under the carpet.


https://github.com/llvm/llvm-project/pull/83200