I don't really know, but I would be suprised if that is the intent of the project because:
1. The maintainer of llgo is a Google employee (and a very talented LLVM engineer).
2. I don't imagine there would be tremendous differences in the strategies used to generate LLVM IR between the tools. ISTM, if there are deficiencies in llgo, then it would be better to fix them rather than creating a whole new tool.
