On May 8, 2015 8:43:15 PM GMT+02:00, Jeff Law <l...@redhat.com> wrote: >On 05/08/2015 03:27 AM, Richard Biener wrote: >> On Wed, May 6, 2015 at 4:04 PM, Yuri Rumyantsev <ysrum...@gmail.com> >wrote: >>> Hi All, >>> >>> Here is a patch which gives us significant speed-up on HASWELL for >>> test containing masked stores. The main goal of that patch is >attempt >>> to avoid HW hazard for maskmove instructions through inserting >>> additional check on zero mask and putting all masked store >statements >>> into separate block on false edge.All MASK_STORE statements having >the >>> same mask put into one block. Any comments will be appreciate. >> >> Hmm. I'm not very happy with this "optimization" happening at the >> GIMPLE level - it feels more like a mdreorg thing... >I haven't looked at the patch, but it sounds like just specialization >using a runtime check to select between the implementations which is >fairly natural to do at the gimple level.
Well, sure. Which is why I suggested a un-ifcvt pass instead. Anyway, the implementation has multiple issues. Richard. >Jeff
