On Thu, Oct 9, 2014 at 10:25 AM, Kirill Yukhin <kirill.yuk...@gmail.com> wrote: > On 08 Oct 23:02, Petr Murzin wrote: >> Hi, >> I have measured performance impact on Haswell platform according to this >> input: >> https://gcc.gnu.org/ml/gcc-patches/2014-06/msg00978.html
What about older processors? The optimization was introduced well before Haswell for then current processors, and it was based on the recommendation from Intel optimization guide. If this optimization doesn't apply for new processors, then tune option should be introduced and set accordingly. Uros.
