[llvm] [SCEV] Rework wrap-flag-inferrence in zext-addrec (PR #217405)

[Ramkumar Ramachandra via llvm-commits]

artagnon wrote:

It turns out that the no-self-wrap was a total red herring, both in the sext-addrec case (https://github.com/llvm/llvm-project/pull/217362) and here. Both patches should be strictly more powerful than the previous versions at a fraction of the compile-time, and the losses are exactly covered by https://github.com/llvm/llvm-project/pull/217782 and https://github.com/llvm/llvm-project/pull/217785 (they remove incorrect code) -- that would make both patches with no test updates, although llvm-opt-benchmark will tell a different story.

https://github.com/llvm/llvm-project/pull/217405