[clang] [llvm] [mlir] [debuginfo][coro] Emit debug info labels for coroutine resume points (PR #141937)

[Tom Tromey via llvm-commits]

tromey wrote:

FWIW I read through the DWARF/debuginfo bits and it looked reasonable to me.  I found a couple small nits.  I didn't read the other parts though.

https://github.com/llvm/llvm-project/pull/141937