On Wed, May 20, 2020 at 12:30:30PM +0200, Richard Biener wrote: > I think this is the wrong way to approach this. You're doing too many > things at once. Try to fix the powerpc regression with the extra > flag_rtl_unroll_loops, that could be backported. Then you can > independently see whether enabling more unrolling at -O2 makes > sense. Because currently we _do_ unroll at -O2 when it does > not increase size. Its just your patches make this as aggressive > as -O3.
Just do a separate flag (and option) for cunroll, instead? The RTL unroller is *the* unroller, and has been since forever. Segher
