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Re: Useless assembly

From: Steven Bosscher <stevenb at suse dot de>
To: gcc at gcc dot gnu dot org
Cc: Kazu Hirata <kazu at cs dot umass dot edu>, sam124 at operamail dot com
Date: Sun, 28 Nov 2004 22:42:37 +0100
Subject: Re: Useless assembly
Organization: SUSE Labs
References: <20041128212717.4590B2B2B86@ws5-7.us4.outblaze.com> <20041128.163544.55510006.kazu@cs.umass.edu>

On Sunday 28 November 2004 22:35, Kazu Hirata wrote:
> Hi Sam,
>
> > Optimizing it at -O3 (which I'm sure includes SSA, DCE, and CCP)
> > just made the compilation take longer and generate more assembly
> > then the first time.
>
> -O3 does not enable SSA-based optimizations.

In fact with GCC 3.4.3, nothing enables SSA-based optimizations.
How could it, there are none.

Gr.
Steven

References:
- Useless assembly
  - From: Sam Lauber
- Re: Useless assembly
  - From: Kazu Hirata

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