I'm the author of ymyzk/tinyc and was surprised to see my project mentioned here after more than 10 years. Since the README is written in Japanese, let me answer in English here. The project has two backends: one for NASM (x86) and another for LLVM IR.

It can. It can also output x86 nasm, here's the relevant part.

https://github.com/ymyzk/tinyc/blob/master/tinyc/generator/n...