[clang] [llvm] [Transforms][Utils][PromoteMem2Reg] Propagate nnan flag on par with the nsz flag (PR #114271)

[Paul Walker via cfe-commits]

paulwalker-arm wrote:

 > Yet we see a value in the change proposed here too hence a good reason for merging it.

I've clearly misunderstood the context of the rebase.  What is the value in merging this change if the original issue has already been resolved?  I guess this fix is simpler and thus might help compiler time but then that wasn't the original intent.



https://github.com/llvm/llvm-project/pull/114271