[patch] enabling vectorization by default at -O3

Diego Novillo dnovillo@google.com
Thu Sep 13 19:02:00 GMT 2007

On 9/13/07, Mark Mitchell <mark@codesourcery.com> wrote:

> Do any of the other optimization maintainers have a feeling about this?
>  Should we turn on vectorization at -O3, or are we not quite there yet?

Anything inside of 5% in SPEC scores is noise.  Enabling vectorization
at -O3 sounds like a fine idea to me.  After all, we always say that
-O3 is a "hopefully better" setting.

IMO, the biggest gain is the stability it will bring to the vectorizer
and the incentive to keep tuning the cost model.

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