[llvm] [CodeExtractor] Copy live-in dbg records whole instead of rebuilding (PR #227794)

[Oliver Hunt via llvm-commits]

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

I'm fairly concerned about this, I'm fairly sure it introduces quadratic behavior, I don't think it is correctly parenting the new expressions.

I'm really not sure what the value of moving away from the existing helper methods.

https://github.com/llvm/llvm-project/pull/227794