On Sat, May 26, 2018 at 11:32:29AM +0200, Allan Sandfeld Jensen wrote: > I brought this subject up earlier, and was told to suggest it again for gcc > 9, > so I have attached the preliminary changes. > > My studies have show that with generic x86-64 optimization it reduces binary > size with around 0.5%, and when optimizing for x64 targets with SSE4 or > better, it reduces binary size by 2-3% on average. The performance changes > are > negligible however*, and I haven't been able to detect changes in compile > time > big enough to penetrate general noise on my platform, but perhaps someone has > a better setup for that? > > * I believe that is because it currently works best on non-optimized code, it > is better at big basic blocks doing all kinds of things than tightly written > inner loops. > > Anythhing else I should test or report?
What does it do on other architectures? Segher
