[jcranmer]

Dragonegg was never a particularly well-maintained project. You're building a bridge between GCC's and LLVM's IR, which means you're highly susceptible to changes in one or the other, and the conversion tends to drop annotations (such as debugging info!). Most people only really cared about Dragonegg as a way to get Fortran code compiled to LLVM IR. Now that Flang exists, the Fortran motivation isn't there.

Essentially, Dragonegg was only ever a last-resort way to get LLVM IR. If you're trying to build a LLVM backend, you might as well emit LLVM IR directly from your frontend rather than trying to deal with a GIMPLE backend and then a GIMPLE-to-LLVM converter.