[llvm] [RFC][LLVM] Emit dwarf data for changed-signature and new functions (PR #165310)

[Orlando Cazalet-Hyams via llvm-commits]

https://github.com/OCHyams commented:

To summarize my current thoughts:

I think it would be nice to be able to describe this change in transformation but I'm worried DWARF just isn't able to do it. I'm not particularly enthusiastic about the current solution because it introduces incorrect debug info. On the other hand, I feel less hesitant about this change because it's now behind a flag and off-by-default.

I don't want to block this, but I also don't feel comfortable review/approving this without other debug-info-folk's buy-in because it doesn't look like there was a strong consensus on the RFC/discourse post (https://discourse.llvm.org/t/rfc-identify-func-signature-change-in-llvm-compiled-kernel-image/).

Following on from the discourse RFC - did you try posing this problem to the dwarf mailing list?

https://github.com/llvm/llvm-project/pull/165310