One would have to write an Xtensa lx106 backend for LLVM. Given that this architecture is pretty simple, just another typical RISC, it should be possible to rew

One would have to write an Xtensa lx106 backend for LLVM. Given that this architecture is pretty simple, just another typical RISC, it should be possible to rewrite, say, a MIPS backend instead of starting from scratch. I'd say it's about a month of a part-time work for a single developer.