2015-11-10 15:30 GMT+03:00 Richard Biener <richard.guent...@gmail.com>: > On Tue, Nov 3, 2015 at 1:08 PM, Yuri Rumyantsev <ysrum...@gmail.com> wrote: >> Richard, >> >> It looks like misunderstanding - we assume that for GCCv6 the simple >> scheme of remainder will be used through introducing new IV : >> https://gcc.gnu.org/ml/gcc-patches/2015-09/msg01435.html >> >> Is it true or we missed something? > > <quote> >> > Do you have an idea how "masking" is better be organized to be usable >> > for both 4b and 4c? >> >> Do 2a ... > Okay. > </quote>
2a was 'transform already vectorized loop as a separate post-processing'. Isn't it what this prototype patch implements? Current version only masks loop body which is in practice applicable for AVX-512 only in the most cases. With AVX-512 it's easier to see how profitable masking might be and it is a main target for the first masking version. Extending it to prologues/epilogues and thus making it more profitable for other targets is the next step and is out of the scope of this patch. Thanks, Ilya > > Richard. >
