ClangBuiltLinux is interested to have it in Clang too:
xbolva00 on Jun 13 2019, 6:20 AM.Authored by
Thanks for the patch, I look forward to this feature!
I think the changes in test/SemaCXX/warn-unused-label-error.cpp, test/Sema/block-literal.c, and test/Sema/address_spaces.c should not be committed (2 look like unrelated cleanups?).