This is more of academic interest than anything at this point, but it's a cool hack. I agree the readme is not clear but it's probably just a little toy project at this point and not meant for lots of other people. I saw it on twitter from Brad. From the notes:
// This is an experimental, pre-alpha, technology preview package. Performance
// is not (yet) a priority. When this virtual machine approach, hopefully,
// reaches a reasonable levels of completeness and correctness, the plan is to
// eventually mechanically translate the IR form, produced by
// http://github.com/cznic/ccir, to Go. Unreadable Go, presumably.