[flang] [llvm] [VPlan] Expand WidenInt inductions with nuw/nsw (PR #163538)

[Luke Lau via llvm-commits]

https://github.com/lukel97 approved this pull request.

LGTM. Looks like this changes a lot of code, did you have a chance to see what the impact was on e.g. llvm-test-suite?

https://github.com/llvm/llvm-project/pull/163538