[llvm] InferAddressSpaces: Handle llvm.fake.use (PR #109567)

[Matt Arsenault via llvm-commits]

https://github.com/arsenm commented:

I'm inclined to go ahead with this, including tests for multiple uses. In the absence of a verifier check this is valid IR that must be handled correctly.

I also still don't see a reason why fake.use would need to have this restriction



https://github.com/llvm/llvm-project/pull/109567