[llvm] [DA] Add tests for nsw doesn't hold on entier iteration (PR #162281)

[Matt Arsenault via llvm-commits]

arsenm wrote:

> > entier?
> 
> entire iteration space
> 
> EDIT: i assume you are asking about the word in the title of the PR

Which isn't a word so fix the typo? 

https://github.com/llvm/llvm-project/pull/162281