On Wed, May 21, 2014 at 4:44 PM, Kugan <kugan.vivekanandara...@linaro.org> wrote: > Compiling some applications with -mgeneral-regs-only produces better > code (runs faster) compared to not using it. The difference here is that > when -mgeneral-regs-only is not used, floating point register are also > used in register allocation. Then IRA/LRA has to move them to core > registers before performing operations. > > I experimented with TARGET_SPILL_CLASS (as in attached patch) to make > floating point register class as just spill class for integer pseudos. > Though this benefits the application which had this issue. Overall > performance with speck2k is neutral (some of the benchmarks benefits a > lot but others regress). I am looking to see if I can make it perform > better overall. Any suggestions welcome. > > Attached experimental patch passes regression but 168.wupwise and > 187.facerec miscompares now. I am looking at fixing this as well. > > Thanks, > Kugan > > gcc/ > 2014-05-22 Kugan Vivekanandarajah <kug...@linaro.org> > > * config/aarch64/aarch64.c (generic_regmove_cost) : Adjust GP2FP and > FP2GP costs. > (aarch64_spill_class) : New function.
> (TARGET_SHIFT_TRUNCATION_MASK) : Define. No you are not defining TARGET_SHIFT_TRUNCATION_MASK, remove it from the changelog. Thanks, Andrew Pinski
