[llvm] [SCEV] Rework wrap-flag-inferrence for sext-addrec (PR #217362)

[Ramkumar Ramachandra via llvm-commits]

artagnon wrote:

Compile-time improvement: https://llvm-compile-time-tracker.com/compare.php?from=2d697458ac3f472e666b7f47586da362839cfacb&to=18d87c32b898b10cca115b63e5b4c896cd49fc73&stat=instructions:u

https://github.com/llvm/llvm-project/pull/217362