I'm starting from the assumption that the vast bulk of hand optimized assembly does not elaborate on the thinking behind the implementation in a way that can be

I'm starting from the assumption that the vast bulk of hand optimized assembly does not elaborate on the thinking behind the implementation in a way that can be processed through training. Certainly not assembly obtained by reverse engineering. Assuming I'm correct, does this mean there is a dearth of training material available for building such a model? It would seem that first one would need a model that could consume arbitrary assembly and somehow discover it's intent, generate 'labels' (apologies if I'm misusing terms here,) and they feed the output into another model.