Hi Nancy, On Fri, 27 Sep 2019 at 03:50, Nancy via llvm-dev <llvm-dev at lists.llvm.org> wrote: > UNREACHABLE executed at /home/nancy/rpp_llvm/rpp_clang/llvm/include/llvm/Support/MachineValueType.h:643! > > Is that a TableGen bug? It looks more like you forgot to add your new type to that switch statement. Cheers. Tim.