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Re: doloop-opt deficiency

From: Sebastian Pop <sebastian dot pop at cri dot ensmp dot fr>
To: Dale Johannesen <dalej at apple dot com>
Cc: gcc mailing list <gcc at gcc dot gnu dot org>
Date: Wed, 31 Aug 2005 11:31:41 +0200
Subject: Re: doloop-opt deficiency
References: <c70460d49fb90b7c1628d8decb91493a@apple.com> <20050830162539.GA2223@napoca.cri.ensmp.fr> <b9650544a21f325f46d948fac34849e1@apple.com>

Dale Johannesen wrote:
> No, look closer.  The version in loop-iv.c does a NEG of 'step' just
> before what's shown here.  The version in tree-ssa-loop-niter.c
> doesn't.  Reversing the operator does make them do the same thing.

Then, I think this is ok.  But you'll have to ask a middle-end
maintainer for checking this fix in.

Thanks,
Sebastian

References:
- doloop-opt deficiency
  - From: Dale Johannesen
- Re: doloop-opt deficiency
  - From: Sebastian Pop
- Re: doloop-opt deficiency
  - From: Dale Johannesen

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