i dont think theres anything that makes it essentiall that llms are non-deterministic though
if you rewrote the math to be all fixed point precision on big ints, i think you would still get the useful LLM results?
if somebody really wanted to make a compiler in an LLM, i dont think that nondetermism is problem
id really imagine an llm compiler being a set of specs, dependency versions, and test definitions to use though, and you'd introduce essential nondetermism by changing a version number, even if the only change was the version name from "experimental" to "lts"