Re: [PATCH,rs6000] Fine-tune vec_construct direct move cost

2017-07-21 Thread Segher Boessenkool
Hi Bill, On Fri, Jul 21, 2017 at 10:40:43AM -0500, Bill Schmidt wrote: > In https://gcc.gnu.org/ml/gcc-patches/2017-05/msg00924.html, I raised the > vectorization cost for a vec_construct operation that requires direct > moves between GPRs and VSRs. The cost equation I substituted has since > pro

[PATCH,rs6000] Fine-tune vec_construct direct move cost

2017-07-21 Thread Bill Schmidt
Hi, In https://gcc.gnu.org/ml/gcc-patches/2017-05/msg00924.html, I raised the vectorization cost for a vec_construct operation that requires direct moves between GPRs and VSRs. The cost equation I substituted has since proven to be slightly more conservative than attended, and we're seeing some c