[llvm] [GlobalOpt]: Removes metadata when referenced global variable is deleted (PR #169221)

[Nikita Popov via llvm-commits]

https://github.com/nikic commented:

I'm not entirely sure what the right fix for this is, but I'm sure that this isn't it...

My reading of https://llvm.org/docs/LangRef.html#associated-metadata is that the global referenced by the `!associated` metadata *can* be DCEd independently, just not the other way around. So possibly this needs a relaxation of the IR verifier to allow a poison operand.

Probably @MaskRay is the right person to ask here.

https://github.com/llvm/llvm-project/pull/169221