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Re: -O more than the sum of its parts?

From: Diego Novillo <dnovillo at google dot com>
To: me22 <me22 dot ca at gmail dot com>
Cc: drew stortz <drew dot stortz at gmail dot com>, gcc-help at gcc dot gnu dot org
Date: Thu, 11 Mar 2010 18:24:07 -0500
Subject: Re: -O more than the sum of its parts?
References: <7088dd691003081924l2c75ec98tca557585304a9e73@mail.gmail.com> <7088dd691003081931w2a9c6618of759c34753b5ac8b@mail.gmail.com> <fa28b9251003081943p62aeb6a9pae217062d8ca8ed9@mail.gmail.com>

On Mon, Mar 8, 2010 at 22:43, me22 <me22.ca@gmail.com> wrote:

> Yes; My understanding is that all of the -O levels have features not
> controllable with individual flags.

Correct.  You can see for yourself by grepping for uses of the
variable 'optimize' in the GCC source code.  Many code paths are
affected by it.

Diego.

References:
- -O more than the sum of its parts?
  - From: drew stortz
- Re: -O more than the sum of its parts?
  - From: me22

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