2015-04-24 13:27 GMT+03:00 Marc Glisse <marc.gli...@inria.fr>: > On Fri, 24 Apr 2015, Uros Bizjak wrote: > >> Please try to generate paradoxical subreg (V2DImode subreg of V1DImode >> pseudo). IIRC, there is some functionality in the compiler that is >> able to tell if the highpart of the paradoxical register is zeroed. > > > Those are not currently legal (I tried to change that) > https://gcc.gnu.org/ml/gcc-patches/2013-03/msg00745.html > https://gcc.gnu.org/ml/gcc-patches/2014-06/msg00769.html > > In this case, a subreg:V2DI of DImode should work. > > -- > Marc Glisse
Thank you for you tips! It seems to work, will try and see what it gives us for i386. Thanks, Ilya
