> Not sure I follow - isn't rustc still only a compiler frontend to LLVM, like clang is for C/C++? The rustc source tree currently includes LLVM, GCC, and Cran

> Not sure I follow - isn't rustc still only a compiler frontend to LLVM, like clang is for C/C++? The rustc source tree currently includes LLVM, GCC, and Cranelift backends: https://github.com/rust-lang/rust/blob/c6db1ca3c93ad69692a4c4b5542f26fda4bf3aec/config.example.toml#L656-L661 https://github.com/rust-lang/rust/blob/c6db1ca3c93ad69692a4c... (Cranelift itself is written in Rust.)