[sidlls]

How would this even work? At best you might get a set of class/function stubs with some minimal logic. At worst what you'd have is a compiler that is actually a complicated, truly AGI brain, which could produce some truly awful code. In which case you've simply reproduced TDD's normal result: truly awful code.

Aside from that, to produce a program that did what is actually required would require test cases and functions that cover the set of inputs and outputs. This is trivial for mathematical functions, but impractical (or impossible) for more general applications (e.g. anything dealing with human inputs).