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Re: [PATCH] Fix up IV-opts more for pointer plus

From: Zdenek Dvorak <rakdver at kam dot mff dot cuni dot cz>
To: Andrew_Pinski at PlayStation dot Sony dot Com
Cc: gcc-patches at gcc dot gnu dot org
Date: Wed, 4 Jul 2007 06:29:55 +0200
Subject: Re: [PATCH] Fix up IV-opts more for pointer plus
References: <OF91BF4952.D0240B68-ON8825730D.00728B9A-8825730D.00749C75@playstation.sony.com>

Hello,

> While looking into the gzip performance regression, I noticed that IV-opts 
> was not taking into account in two places POINTER_PLUS_EXPR.  The problem 
> is IV-OPTs really needs to look at POINTER_PLUS_EXPR a bit more.  This 
> makes IV-OPTS does that and the IV selection is better for the inner loops 
> in deflact.c in gzip.
> 
> I have not done a full performance analysis to double check that this 
> speeds up gzip but as mentioned before I looked into deflact.c and it 
> improved the loops there.
> 
> OK?  Bootstrapped and tested on i686-linux-gnu with no regression.

OK.

Zdenek

References:
- [PATCH] Fix up IV-opts more for pointer plus
  - From: Andrew_Pinski

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