rgo (stalled) 
rgo was a work-in-progress Go compiler, written in Rust.
This was primarily a fun learning project.
I chose Go as the source language because C compilers have been written over and over, and I wanted to do something new. Go's spec is pretty simple, so it seemed like a good choice. The fact that is has a GC also made implementing a compiler for it more challenging and, therefore, more interesting.
Additionally, Go's reference implementation uses a custom backend for
optimization and codegen, while rgo was to use LLVM for optimization and machine
code generation.
License
Copyright (c) 2016 The rgo Project Developers.
Licensed under either of
at your option.
Contribution
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.