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Date: Mon, 6 Sep 2021 16:37:10 +0000
From: Joseph Myers <joseph@codesourcery.com>
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To: liuhongt <hongtao.liu@intel.com>
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Subject: Re: [PATCH] Enable auto-vectorization at O2 with very-cheap cost
 model.
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On Mon, 6 Sep 2021, liuhongt via Gcc-patches wrote:

> Hi:
>   As discussed in [1], most of (currently unopposed) targets want
> auto-vectorization at O2, and IMHO now would be a good time to enable O2
> vectorization for GCC trunk, so it would leave enough time to expose
> related issues and fix them.
> 
>   Bootstrapped and regtested on x86_64-linux-gnu{-m32,}
>   Ok for trunk?

This needs updates to the documentation of -O2 and -ftree-vectorize in 
invoke.texi.

-- 
Joseph S. Myers
joseph@codesourcery.com