[llvm] [Uniformity] Fixed control-div early stop (PR #139667)

[Junjie Gu via llvm-commits]

jgu222 wrote:

With the latest patch, all lit tests passed.
I am  closing the other patch (https://github.com/llvm/llvm-project/pull/140013)

https://github.com/llvm/llvm-project/pull/139667