> > Let's start with sched1 ... > > > > For our architecture at least, it seems like Richard Earnshaw is > > right that sched1 is generally bad when you are using -Os, because > > it can increase register pressure and cause extra spill/fill code > when > > you move independent instructions in between dependent instructions. > > Please note that Vladimir Makarov implemented register pressure-aware > sched1 > for GCC 4.5, activated with -fsched-pressure. I thought I should > mention > this because your e-mail omits it completely, so it's hard to tell > whether you > tested it. >
Hi Alexander, We are on GCC 4.4 at the moment. I don't see us moving up in the near future, but I could apply the patch and see what it does for us. Cheers, Ian
