Hi, > > > 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. > > If you make the function static then gcc can chose ABI-incompatible > calling conventions.
alternatively, you can use -fwhole-program to get the same effect. Zdenek
