vectorizer default in 4.3.0 changes document missing

[Ira Rosen]

Hi Andi,

gcc-owner@gcc.gnu.org wrote on 10/03/2008 18:32:35:

>
> I noticed the gcc 4.3.0 changes document on the website does not
> mention that the vectorizer is now on by default in -O3.
> Perhaps that should be added? It seems like an important noteworthy
> change to me.

Thanks for pointing this out. The vectorizer's website was not update for a
while. I am going to do that.

>
> I'm not sure it applies to all architectures, but it applies to
> x86 at least.

Vectorization (-ftree-vectorize) is on by default in -O3 on all platforms,
but many architectures require additional flags to actually apply it, like
-maltivec on PowerPC.

Thanks,
Ira

>
> -Andi