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Re: Division by zero

From: Ian Lance Taylor <iant at google dot com>
To: "Jie Zhang" <jzhang918 at gmail dot com>
Cc: gcc at gcc dot gnu dot org
Date: 09 Feb 2007 21:57:09 -0800
Subject: Re: Division by zero
References: <6f48278f0702092059n1cd6005ah9dea2795827a11aa@mail.gmail.com>

"Jie Zhang" <jzhang918@gmail.com> writes:

> But now gcc seems to optimize it away. For the following function:
> 
> $ cat t.c
> #include <limits.h>
> void foo (int rc)
> {
>   int x = rc / INT_MAX;
>   x = 4 / x;
> }

I believe we still keep division by zero in general.  In your example
it gets optimized away because it is dead code.  Nothing uses x.

Ian

Follow-Ups:
- Re: Division by zero
  - From: Robert Dewar

References:
- Division by zero
  - From: Jie Zhang

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