On Fri, Oct 8, 2021 at 9:29 AM liuhongt via Gcc-patches <gcc-patches@gcc.gnu.org> wrote: > > --- > htdocs/gcc-12/changes.html | 9 +++++++++ > 1 file changed, 9 insertions(+) > > diff --git a/htdocs/gcc-12/changes.html b/htdocs/gcc-12/changes.html > index 22839f2d..6e898db7 100644 > --- a/htdocs/gcc-12/changes.html > +++ b/htdocs/gcc-12/changes.html > @@ -68,6 +68,15 @@ a work-in-progress.</p> > <!-- .................................................................. --> > <h2 id="general">General Improvements</h2> > > +<ul> > + <li>The vectorization is enabled in <code>-O2</code>, now <code>-O2</code> > is
Vectorization is enabled at <code>-O2</code> which is now equivalent to the original ... > + equivalent to the original <code>-O2 -ftree-vectorize > + -fvect-cost-model=very-cheap</code>. Note that default vect cost model > has Note that the default vectorizer cost model > + been changed which may have a subtle effect, for example for the case > with > + <code>-O2 -fopenmp #pragma omp parallel for simd</code>. .. which used to behave as <code>-fvect-cost-model=cheap</code> were specified. OK with those changes. Richard. > + </li> > +</ul> > + > <!-- .................................................................. --> > <h2 id="languages">New Languages and Language specific improvements</h2> > > -- > 2.18.1 >
