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Re: A prototype loop reverser for the scalarizer

From: "Daniel Berlin" <dberlin at dberlin dot org>
To: "Steven Bosscher" <stevenb dot gcc at gmail dot com>
Cc: "Paul Thomas" <paulthomas2 at wanadoo dot fr>, "Jack Howarth" <howarth at bromo dot msbb dot uc dot edu>, fortran at gcc dot gnu dot org, Paul dot Richard dot THOMAS at cea dot fr
Date: Sun, 8 Oct 2006 10:59:45 -0400
Subject: Re: A prototype loop reverser for the scalarizer
References: <20061006140416.F3A2511003F@bromo.msbb.uc.edu> <4528E187.30002@wanadoo.fr> <200610081513.53721.steven@gcc.gnu.org>

On 10/8/06, Steven Bosscher <stevenb.gcc@gmail.com> wrote:

On Sunday 08 October 2006 13:31, Paul Thomas wrote:
> I do not seem able to make |ftree-loop-linear do loop revresal for me.
> Should this not effect the same transformation, or have I misunderstood
> something?

IRIC, loop reversal is not yet implemented in the framework of
-ftree-loop-linear optimizations.  Dan Berlin knows more about that,
I suppose.


It is implemented, in terms of "if you tell it to reverse a loop, it
will". None of the heuristics tell it to reverse a loop right now,
however. :)

Follow-Ups:
- Re: A prototype loop reverser for the scalarizer
  - From: Paul Thomas

References:
- Re: A prototype loop reverser for the scalarizer
  - From: Jack Howarth
- Re: A prototype loop reverser for the scalarizer
  - From: Paul Thomas
- Re: A prototype loop reverser for the scalarizer
  - From: Steven Bosscher

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