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Date: Wed, 16 Jan 2002 18:01:55 +0100
From: Jan Hubicka <jh AT suse DOT cz>
To: pgcc AT delorie DOT com
Subject: Re: compiler-news?
Message-ID: <20020116170155.GG14914@atrey.karlin.mff.cuni.cz>
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> On Tue, 15 Jan 2002, Henrik Berglund  SdU wrote:
> 
> > On Tue, 15 Jan 2002, Marc wrote:
> >
> > > I should at least make the patch for 2.95.4, yes, but gcc-3.x produces slower
> > > code (backend), but has a different internal structure so I expect much
> > > better optimizations "soon".
> > Yes i have installed gcc 3.0.3 on redhat and get nice nbench results
> > on my duron 1.2GHz
> >
> 
> How 3.0.3 is compared to 2.95? The very first versions of gcc-3 were
> slower in athlon than 2.95.

Only in the FP code.
3.0.3 fixes number of FP issues, but the compariosns are still quite balanced.
You may take a look at www.suse.de/~aj/SPEC for SPEC results - the 3.0.x is at
average better than 2.95 in both SPECint and SPECfp.  There are however important
problems with scheduling on some numeric code, mainly Atlas.  They are partly
tracked down in 3.0.2 and 3.0.3. 3.0.0 additionally had problem with stack
missalignment caused due to glibc2 misscompiled by buggy 2.95 stack alignment
code distributed by most of major distros.

Honza
> 
> 
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