----- Forwarded message from amyl...@spamcop.net -----
    Date: Mon, 11 May 2009 05:07:52 -0400
    From: Joern Rennecke <amyl...@spamcop.net>
Reply-To: Joern Rennecke <amyl...@spamcop.net>
Subject: Re: Interest in integer auto-upcasting pass for normalization and optimization?
      To: Daniel Jacobowitz <d...@false.org>
Cc: Albert Cohen <albert.co...@inria.fr>, Richard Guenther <richard.guent...@gmail.com>, Nathan Froyd <froy...@codesourcery.com>

On Sat, May 09, 2009 at 10:07:38PM +0200, Albert Cohen wrote:
I wonder if some of this is already implemented somewhere, or if someone played with it in the past, or is interesting in contributing.

Daniel Jacobowitz:
This sounds a bit similar to Nathan Froyd's recent work:

Note that this is PR 29944.

For ARCompact, doloop loops in particular were interesting to
optimize, which is why I have a patch to loop-doloop.c in
svn://gcc.gnu.org/svn/gcc/branches/arc-4_4-branch :

2009-02-24  J"orn Rennecke  <joern.renne...@arc.com>

         * loop-doloop.c (doloop_valid_p): Rename to:
         (validize_doloop).  Try to fix up loops with conditons for infinite
         looping by enclosing them in an outer loop.
         Changed caller.
         (add_test): Add new parameter edgep.  Changed caller.






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