[llvm] [SCEV] Rework IncrementWrapFlags (PR #219559)

[Ramkumar Ramachandra via llvm-commits]

https://github.com/artagnon commented:

Thanks for all the discussions so far! It has helped me understand the problem, and have a fundamental insight, which is explained in the new description. The patch has been re-worked completely, and results in various minor improvements.

https://github.com/llvm/llvm-project/pull/219559