[llvm] [HashRecognize] Track visited in ValueEvolution (PR #147812)

[Piotr Fusik via llvm-commits]

pfusik wrote:

> > If that's exactly trip-count times per instructions, we could compare against the number multiplied by TC.
> 
> True, but the code would become a lot more cryptic, with various ++NumVisited statements.

I agree. Let's keep it as-is.

https://github.com/llvm/llvm-project/pull/147812