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Re: Pre_dec and Post_inc insns

From: Alexandre Oliva <aoliva at redhat dot com>
To: Zdenek Dvorak <rakdver at atrey dot karlin dot mff dot cuni dot cz>
Cc: Natasha Wilson <nat_w at operamail dot com>, gcc at gcc dot gnu dot org
Date: 01 Jul 2003 17:09:30 -0300
Subject: Re: Pre_dec and Post_inc insns
Organization: GCC Team, Red Hat
References: <orwuf22tyc.fsf@free.redhat.lsd.ic.unicamp.br><20030701184703.GA2927@atrey.karlin.mff.cuni.cz>

On Jul  1, 2003, Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> wrote:

> there actually is some horrible condition in cse to prevent this, with
> the effect that chains of additions sometimes are not csed.

Yes, there is indeed (I forgot to mention it), but the condition is
wrong.

> IMO the right solution is to make autoinc creating pass smarter

My thought too.  Unfortunately it would duplicate some effort from
reload move2add.

-- 
Alexandre Oliva   Enjoy Guarana', see http://www.ic.unicamp.br/~oliva/
Red Hat GCC Developer                 aoliva@{redhat.com, gcc.gnu.org}
CS PhD student at IC-Unicamp        oliva@{lsd.ic.unicamp.br, gnu.org}
Free Software Evangelist                Professional serial bug killer

References:
- Re: Pre_dec and Post_inc insns
  - From: Alexandre Oliva
- Re: Pre_dec and Post_inc insns
  - From: Zdenek Dvorak

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