[llvm] [DA] Infer nsw on validated fixed-size delinearized subscripts (PR #201882)

[Ryotaro Kasuga via llvm-commits]

kasuga-fj wrote:

@nikic Thanks!

> I haven't reviewed the test changes in detail yet, maybe someone can take a look at the DA diffs.

I can review the diffs of DA.

https://github.com/llvm/llvm-project/pull/201882