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Re: Gcc silently transforms a finite loop to an infinite one

From: "Joseph S. Myers" <joseph at codesourcery dot com>
To: David Brown <david dot brown at hesbynett dot no>
Cc: gcc at gcc dot gnu dot org, Nadezhda IvanÐvna Vyukova <niva at niisi dot msk dot ru>
Date: Tue, 29 Nov 2011 22:56:02 +0000 (UTC)
Subject: Re: Gcc silently transforms a finite loop to an infinite one
References: <1322566691.2994.43.camel@ab02> <Pine.LNX.4.64.1111291540330.26895@digraph.polyomino.org.uk> <4ED55E55.3050902@hesbynett.no>

On Tue, 29 Nov 2011, David Brown wrote:

> On 29/11/11 16:44, Joseph S. Myers wrote:
> > converting the int to char (which GCC defines as modulo) applies.  See PR
> > 35634 which has various discussion of possible approaches for fixing
> > this, and patches that introduce vectorizer optimization regressions.

> Does this mean that there is a bug somewhere, or is it the conversion from int

There is a bug.  As I said, see PR 35634.

-- 
Joseph S. Myers
joseph@codesourcery.com

References:
- Gcc silently transforms a finite loop to an infinite one
  - From: Nadezhda Ivanоvna Vyukova
- Re: Gcc silently transforms a finite loop to an infinite one
  - From: Joseph S. Myers
- Re: Gcc silently transforms a finite loop to an infinite one
  - From: David Brown

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