Interestingly there was, in the first days of clang, an Ada 'compiler', through dragonegg. The original author meant to write an Ada compiler on top of llvm and

Interestingly there was, in the first days of clang, an Ada 'compiler', through dragonegg. The original author meant to write an Ada compiler on top of llvm and translated (iirc) gcc's gimple to llvm, with some success. The fun part is that dragonegg became an important part of clang/llvm for years (before it was phased out) to compile fortran (before flang) and to compare clang results and gcc's. I seem to remember other interesting uses but my memory is failing me. Duncan Sands (the original author I think?) is an outstanding engineer and very fun person to talk to.