[llvm] [DAG] Precommit test for PR #164946 - Update Tests SimplifyDemandedBits - ICMP_SLT(X,0) - only sign mask of X is required (PR #171030)

[Anikesh Parashar via llvm-commits]

an1k3sh wrote:

> Precommit tests would mean adding new tests, but this is just a bunch of changes in existing tests with no code changes?
> 
> > Resolves #164589
> 
> A test-only can't really resolve an issue?

The code changes can be viewed in PR #164946. I've created a new PR as requested by @topperc in one of the comments in the code change PR. Do let me know if this is not desired.


https://github.com/llvm/llvm-project/pull/171030