r207433 - [driver] Disable the slp vectorizer at -O0, -O1, and -Oz. This mirrors the

[Chad Rosier]

Hi Chandler,
The discussion was in the PR as well as via IRC.  I'm certainly not
against continuing the discussion.

I believe everyone strongly agrees this shouldn't be on at -O0;  Let me
know if you feel otherwise.  The decision to match the behavior of the
loop vectorizer at -O1 and -Oz was mostly arbitrary and I have no strong
feelings either way.

What are your thoughts?

 Chad

> On Mon, Apr 28, 2014 at 12:30 PM, Chad Rosier
> <mcrosier at codeaurora.org>wrote:
>
>> -O1, and -Oz
>
>
> Wait, why? Based on what discussion?
>
> This is a pretty significant change, I'd like to understand why it was
> made.
>


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