[mbrubeck]

> 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/c6db1ca3c93ad69692a4c...

(Cranelift itself is written in Rust.)