[lld] [llvm] [IPSCCP] Track returns of non-interposable definitions (PR #210374)

[Nikita Popov via llvm-commits]

https://github.com/nikic requested changes to this pull request.

I don't think this is correct. If the return value is non-deterministic, we may refine to a specific value, which IPSCCP will propagate after this change. However, the prevailing definition may end up doing a different non-deterministic choice.

https://github.com/llvm/llvm-project/pull/210374