[LLVM] Update exception handling maintainer

[nikic]

We currently list @asl as the maintainer for exception handling, but I don't think he has been particularly involved in that area in recent years. Please correct me if I'm wrong!

I'd like to nominate @efriedma-quic as the replacement. I think Eli is familiar with all our exception mechanisms and a good choice of reviewer for related PRs.

[efriedma-quic]

I'm not sure "exception handling" is the right way to define the area. On the LLVM side, DWARF EH and WinEH live in mostly parallel worlds: the IR constructs are different, and the code generator codepaths are mostly independent. I'm happy to pick up WinEH, but I don't want to spread myself too thin, and I think there are probably better alternatives for DWARF EH.

CC @rnk @mstorsjo @phoebewang @dwblaikie

[asl]

@efriedma-quic is correct. Historically "exception handling" was Dwarf EH. Even on Windows we used Dwarf EH in mingw world. All Windows-related constructs appeared much later (and their semantics is indeed different).

[dwblaikie]

Yeah, not sure who'd be best for DWARF EH - @MaskRay has reviewed some patches in that area lately, but maybe there's someone else with more bandwidth?

[rnk]

I have a pretty decent understanding of how both systems (WinEH and DWARF) work and I would volunteer to write my name down for exception handling. I can't speak to the other platform specific unwind info formats (MachO compact unwind and ARM), but that's less relevant here.