There are some open issues and features like inline assembly that aren't supported, but a moderately complete backend exists now: https://github.com/bjorn3/rus

There are some open issues and features like inline assembly that aren't supported, but a moderately complete backend exists now: https://github.com/bjorn3/rustc_codegen_cranelift https://github.com/bjorn3/rustc_codegen_cranelift The compiler frontend is already written in Rust.