https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77848
--- Comment #14 from rguenther at suse dot de <rguenther at suse dot de> --- On November 5, 2016 4:31:54 PM GMT+01:00, "wschmidt at gcc dot gnu.org" <gcc-bugzi...@gcc.gnu.org> wrote: >https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77848 > >--- Comment #13 from Bill Schmidt <wschmidt at gcc dot gnu.org> --- >SPEC cpu2006 on powerpc64le-unknown-linux-gnu with the simple patch: > >Geomean, integer: +0.2% >Geomean, float: +0.5% >Geomean, overall: +0.4% > >Notable improvements: > 454.calculix: +3.7% > 453.povray: +3.4% > 458.sjeng: +1.4% > 429.mcf: +1.2% > 445.gobmk: +1.2% > 471.omnetpp: +1.2% > >Notable degradations: > 403.gcc: -1.8% > >Other results in noise (+/- 1.0%) > >Thus, not too bad for a simple patch, though we don't like seeing >403.gcc >degrade. Analyzing would be useful, I suspect missed RTL if-conversion opportunities. >I've made some progress on the outer loop vectorization issue, but >haven't >completely solved it yet. I'll try to have something to look at there >in the >next couple of days. I'd try detecting the outer loop vect CFG shape the vectorizer handles in if-combersion and then simply version the outer loop... Of course needs handling of the VECTORIZED conditional on an outer loop in the vectorizer.
