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Re: C++ aliasing changes on mainline (was: GCC 3.1 Prerelease)

From: Jan Hubicka <jh at suse dot cz>
To: Paolo Carlini <pcarlini at unitus dot it>
Cc: Gerald Pfeifer <pfeifer at dbai dot tuwien dot ac dot at>, gcc at gcc dot gnu dot org
Date: Wed, 24 Apr 2002 12:41:45 +0200
Subject: Re: C++ aliasing changes on mainline (was: GCC 3.1 Prerelease)
References: <Pine.BSF.4.44.0204232000250.2524-100000@pulcherrima.dbai.tuwien.ac.at> <3CC68A27.9040007@unitus.it>

> Gerald Pfeifer wrote:
> 
> >I got mixed results. The binary with the changes above (and all CVS
> >changes between Monday and Tuesday)  was somewhat smaller than the
> >original. Performance didn't change too much, either way.
> >
> Thank you very much Gerald.
> Indeed, I find those numbers very interesting and very puzzling! 
> Definitely I did expect a clear positive effect of the C++ aliasing 
> patch... First, I have to learn more about the main features of such C++ 
> code.
Just note that there has been at least positive change for eon benchmark
on Andreas' SPECint pages (www.suse.de/~aj/SPEC)

Honza
> 
> Ciao, Paolo.
>

References:
- C++ aliasing changes on mainline (was: GCC 3.1 Prerelease)
  - From: Gerald Pfeifer
- Re: C++ aliasing changes on mainline (was: GCC 3.1 Prerelease)
  - From: Paolo Carlini

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