skaller wrote:
So I am guessing the Felix version is lucky there are no gratuitous temporaries to be saved when this happens, and the C code is unlucky and there are.Maybe someone who knows how the optimiser works can comment?
One problem with departing from the ABI even on a local level like this is that it wipes out lots of tools that depend on ABI compliance for the entire call chain. I suspect the overall gain is too small to be worth this hit.
