I think you've got the wrong idea on "self-hosted". That just means the compiler is written in the language itself. Rustc is written in rust, so it is self-host

I think you've got the wrong idea on "self-hosted". That just means the compiler is written in the language itself. Rustc is written in rust, so it is self-hosted (even if it has an LLVM backend). And likewise, all three D implementations are written in D, despite having either baked-in code generation, a gcc backend, or an llvm backend. You can check the repos on github: all three of DMD, LDC, and GDC are written in D-lang, so they are self-hosted.