I think this is brilliant! And, what's more important, practical.

I did a similar thing a few years back for small linear systems: https://wordsandbuttons.online/outperforming_everything_with... The idea is essentially the same - we both turn the computation process itself into code. I choose LLVM intermediate language instead of C because the whole point of my exercise was to show that you don't need C (or any other compiler) to generate efficient code. In fact, if you already have your computation figured out, C only gets in the way. For this very reason, I avoided calling the code generation process a "compiler".

My thing, however, doesn't have any practical usage. This one does and I think it's beautiful!