Nice project, but is it just me or is calling this a "C" compiler a bit of a stretch? Couldn't the title read CC500: a tiny self-hosting subset-of-C compiler.

I realize it looks like C, but then so does anything with the words if, while, and braces. (It doesn't seem to have the word "for".) Since it says the compiler "does not even parse the types", that part seems like window-dressing and not part of the language.

I bet you could write the complete reference for the language this compiles in a paragraph.