LLVM IR: A Low Level Virtual Machine

Rust is written in Rust and the standard library is written in Zig. LLVM IR is basically their serialized format of like, here's LLVM's like representation of your code that you wanted to compile. So what we do is when we compile your rock program, we want LLVM to be able to optimize the rock program and the standard libraries together because it can do a better job optimizing if it knows about everything. And so one of the ideas was, oh, well, what if we did the same thing with the platform? And now you can get this whole program optimization of LLVM across not just your standard library and your application but also your platform too.