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

[Robert Imschweiler via llvm-commits]

ro-i wrote:

Added a fix and a testcase for the issue @Meinersbur mentioned.

(@arsenm yeah, ig this approach does make sense. From what I've read in past discussions, others think that the pass needs a rewrite, but I'm glad it does not seem necessary at the moment and that I can fix the current issue in a more straightforward way :) )

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