Because they have not shown general performance benefit. I hope that the renewed attention and development effort will allow them to be enabled by default eventually.
Thanks, David On Sun, Nov 16, 2014 at 2:10 PM, Andi Kleen <a...@firstfloor.org> wrote: > > Is there any specific reason why none of the graphite loop optimizations > (loop-block, loop-interchange, loop-strip-mine, loop-jam) > are enabled with -O3 or -Ofast? > > I assume doing so would make them much more widely used. > > Perhaps would be something to consider for 5.0? > > -Andi >
