On Thu, Sep 12, 2013 at 11:25:31AM +0200, Richard Biener wrote: > On Thu, Sep 12, 2013 at 10:40 AM, Frederic Riss <frederic.r...@gmail.com> > wrote: > > Thus I'm wondering if the vectorizer makes the assumption that a > > target must be able to load/store vectors aligned on any element size > > boundary. If it's the case, how can a target determine that a specific > > access might not be fully aligned (and handle it specifically)?
Are you sure the vectorizer doesn't insert a runtime condition whether it is aligned? I mean, perhaps attempts to align the store by peeling a few first iterations for alignment, and then check at runtime if the remaining accesses are aligned? Jakub