system
Given the following post, respond as if you're commenting on Reddit:
human
How does infinite loop detection work?

Recently I read that some compilers can optimize away an infinite loop. But shouldn't that be impossible because of the halting problem? (I actually don't really understand how the halting problem works, but I know that it basically says you can't detect an infinite loop.)
gpt
You cannot have an algorithm that will prove termination (or non-termination) for an arbitrary algorithm. Yet, there is a huge class of algorithms (and even languages) for which you can have a guaranteed proof.

E.g., if a loop does not have an exit edge at all, it's infinite, proof is trivial.