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Date: Wed, 19 Mar 2008 10:05:00 -0000
From: "Richard Guenther" <richard.guenther@gmail.com>
To: "Ira Rosen" <IRAR@il.ibm.com>
Subject: Re: [patch, doc] Add -ftree-vectorize to the list of optimizations turned on under -O3.
Cc: gcc-patches@gcc.gnu.org, "Bradley Lucier" <lucier@math.purdue.edu>
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On Wed, Mar 19, 2008 at 8:51 AM, Ira Rosen <IRAR@il.ibm.com> wrote:
>
>  Hi,
>
>  This is a fix for:
>
>  Bradley Lucier <lucier@math.purdue.edu> wrote on 19/03/2008 06:01:19:
>
>  > The web page
>  >
>  > http://gcc.gnu.org/gcc-4.3/changes.html
>  >
>  > states that "The -ftree-vectorize option is now on by default under -
>  > O3.", but on
>  >
>  > http://gcc.gnu.org/onlinedocs/gcc-4.3.0/gcc/Optimize-Options.html
>  >
>  > -ftree-vectorize is not listed as one of the options enabled by -O3.
>
>  O.K. for 4.3 and 4.4?

This is ok if you also expand

@item -ftree-vectorize
@opindex ftree-vectorize
Perform loop vectorization on trees.

to say "This is enabled by default at @option{-O3}."

Richard.

>  Thanks,
>  Ira
>
>  ChangeLog:.
>
>       * doc/invoke.texi (-O3): Add -ftree-vectorize to the list of
>       optimizations turned on under -O3.
>
>  Index: invoke.texi
>  ===================================================================
>  --- invoke.texi (revision 133335)
>  +++ invoke.texi (working copy)
>  @@ -5224,8 +5224,8 @@ invoking @option{-O2} on programs that u
>   @opindex O3
>   Optimize yet more.  @option{-O3} turns on all optimizations specified by
>   @option{-O2} and also turns on the @option{-finline-functions},
>  -@option{-funswitch-loops}, @option{-fpredictive-commoning} and,
>  -@option{-fgcse-after-reload} options.
>  +@option{-funswitch-loops}, @option{-fpredictive-commoning},
>  +@option{-fgcse-after-reload} and @option{-ftree-vectorize} options.
>
>   @item -O0
>   @opindex O0
>
>