What language is that? One of the tags says llvm-ir. Well, I know what LLVM is and I guess IR is its intermediate representation between frontend and backend.

What language is that? One of the tags says llvm-ir. Well, I know what LLVM is and I guess IR is its intermediate representation between frontend and backend. Would one program in that manually? Why? Because it can be done or some better reason? Or has been generated from something?