[llvm] [LoopVectorize] Support vectorization of overflow intrinsics (PR #174835)

[Benjamin Maxwell via llvm-commits]

https://github.com/MacDue commented:

Few small comments. I think this generally LGTM (though I'm not sure we need all the tests, but I guess there's little harm given they have generated checks). 

https://github.com/llvm/llvm-project/pull/174835