[llvm] [GlobalIsel] Visit ICmp (PR #105991)

[Thorsten Schütt via llvm-commits]

tschuett wrote:

I strongly disagree with the change request. Compares and only compares deserve special treatment. Placing several optimizations into one function is beneficial. They share resources and order matters. Spreading them over several combines would be less efficient. In most cases, the pattern would be G_CIMP, which I am not interested in.

https://github.com/llvm/llvm-project/pull/105991