[llvm] [IR][JumpThreading] Fix infinite recursion on compare self-reference [updated] (PR #129501)

[Robert Imschweiler via llvm-commits]

ro-i wrote:

```
%x = icmp %a, %p
%y = icmp %x, %p
```
When handling %y, `evaluateOnPredecessorEdge` will descend into %x. There, it will already handle %p. Consequently, %p will already be in the Visited set when it should be handled as the second argument to %y.
That's what you meant, @Meinersbur , right?

https://github.com/llvm/llvm-project/pull/129501