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Re: [rtlopt] runtime iterations unrolling fix

From: Zdenek Dvorak <rakdver at atrey dot karlin dot mff dot cuni dot cz>
To: Jan Hubicka <jh at suse dot cz>
Cc: gcc-patches at gcc dot gnu dot org
Date: Sun, 27 Oct 2002 21:08:43 +0100
Subject: Re: [rtlopt] runtime iterations unrolling fix
References: <20021025213543.GI28282@kam.mff.cuni.cz> <20021026214417.GA17917@atrey.karlin.mff.cuni.cz> <20021026220129.GA18149@kam.mff.cuni.cz> <20021026223629.GA26699@atrey.karlin.mff.cuni.cz> <20021026225101.GG18149@kam.mff.cuni.cz>

Hello,

> > Should not we increase exp by stride rather than by 1 a few lines below?
> Yes, I guess so.
> for (i=0;i<=4;i+=4)
> should get misscompiled by current code.

I just found out that the code was correct as it was :-( I should not
try to fix something that works...

I will correct my mistake together with the patch to improve
preconditioning for preincr loops.

Zdenek

References:
- [rtlopt] runtime iterations unrolling fix
  - From: Jan Hubicka
- Re: [rtlopt] runtime iterations unrolling fix
  - From: Zdenek Dvorak
- Re: [rtlopt] runtime iterations unrolling fix
  - From: Jan Hubicka
- Re: [rtlopt] runtime iterations unrolling fix
  - From: Zdenek Dvorak
- Re: [rtlopt] runtime iterations unrolling fix
  - From: Jan Hubicka

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