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Re: [cfg-branch] Iteration number counting using symbolic simplifications

From: Jan Hubicka <jh at suse dot cz>
To: Zdenek Dvorak <rakdver at atrey dot karlin dot mff dot cuni dot cz>
Cc: Jan Hubicka <jh at suse dot cz>, gcc-patches at gcc dot gnu dot org,gcc-pdo at atrey dot karlin dot mff dot cuni dot cz
Date: Thu, 2 May 2002 19:50:45 +0200
Subject: Re: [cfg-branch] Iteration number counting using symbolic simplifications
References: <20020502140637.GL1512@atrey.karlin.mff.cuni.cz> <20020502164402.GS1512@atrey.karlin.mff.cuni.cz> <20020502172739.GA7956@atrey.karlin.mff.cuni.cz>

> Hello.
> 
> > > this patch adds the symbolic way of predicting number of iterations we've
> > > talked about.  I now have count_loop_iterations that count number of iterations
> > > in the stupid way - assuming that the loop is not paradoxical and
> > > test_for_iteration returning RTX expression of the comparison at given
> > > iteration count.
> > > 
> > Hi,
> > It has died in the stage3 of bootstrap, so I've fixed some bugs around and
> > re-started testing
> 
> I like it :-). The only thing I would change is:
OK,
I have to leave soon, so I am commiting the patch.  It built working cc1 for
stage3, I don't have time to wait for other optimizers, but I am optimistic :)

Honza

References:
- [cfg-branch] Iteration number counting using symbolic simplifications
  - From: Jan Hubicka
- Re: [cfg-branch] Iteration number counting using symbolic simplifications
  - From: Jan Hubicka
- Re: [cfg-branch] Iteration number counting using symbolic simplifications
  - From: Zdenek Dvorak

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