The cited problem was abstracting over different architectures. Go's IR solves this problem already. Solving this problem has nothing to do with making LLVM IR

The cited problem was abstracting over different architectures. Go's IR solves this problem already. Solving this problem has nothing to do with making LLVM IR and Go's IR interoperable. A related problem might be that Go's IR doesn't target as many platforms as LLVM's, but that's still a different problem.