"Marc Schütz" <[email protected]> wrote: > On Sunday, 20 July 2014 at 11:09:45 UTC, Tobias Müller wrote: >> "Marc Schütz" <[email protected]> wrote: >>> On Saturday, 19 July 2014 at 19:49:24 UTC, Ola Fosheim Grøstad >> wrote: >>>> On Saturday, 19 July 2014 at 08:34:39 UTC, Kagamin wrote: >>>>> Can't it simply generate code as is? Seems wasteful to spend >>>>>>> compilation time on this. >>>>>>> Not if you want fast code, consider a template with: >>>>>>> if (a.length+M < b.length+N) {} >>>>>>> then you alias b = a in the template instantiation: >>>>>>> if(a.length+M < a.length+N){} >>>>>>> you want this reduced to: >>>>>>> if (M<N){ >>>> } >>>>>>> which can be resolved at compile time. >>>>> Yes, but that is the optimizer's job. The front-end doesn't >> need to >>>>> spend >>> time on it, if the back-end then anyway does the same >> optimization again. >> >> I don't think anyone has said that the frontend does that. > > I do ;-) This is how I interpret Kagamin's post.
Hm I interpreted it the other way round, it's wasteful to spend time for such optimizations, just. But my english is probably not as good as yours. Tobi
