From what I remember from watching Terry's videos he also did something like this in TempleOS with his compiler HolyC. His shell is apperently just his compiler

From what I remember from watching Terry's videos he also did something like this in TempleOS with his compiler HolyC. His shell is apperently just his compiler running in an interactive mode. HolyC is "kind of" C from a compiler perspective so I think it counts.