On Fri, Apr 10, 2020 at 11:28 AM Kewen.Lin <li...@linux.ibm.com> wrote: > > Hi, > > This is one fix following Richi's comments here: > https://gcc.gnu.org/pipermail/gcc-patches/2020-March/542232.html > > I noticed the current half vector support for no peeling gaps > handled some cases which never check the half size vector > support. By further investigation, those cases are safe > to play without peeling gaps due to ideal alignment. It > means they don't require half vector handlings, we should > avoid to use half vector for them. > > The fix is to add alignment check as a part of conditions for > half vector support avoiding redundant half vector codes. > > Bootstrapped/regtested on powerpc64le-linux-gnu P8, while > aarch64-linux-gnu testing is ongoing. > > Is it ok for trunk if all testings are fine?
OK for stage1 (it's just a missed optimization). Thanks, Richard. > BR, > Kewen > ---------------- > > gcc/ChangeLog > > 2020-MM-DD Kewen Lin <li...@gcc.gnu.org> > > * gcc/tree-vect-stmts.c (vectorizable_load): Check alignment to avoid > redundant half vector handlings for no peeling gaps.
