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List:       gcc-patches
Subject:    Re: PR 21438 : Warning about division by zero depends on lexical  form
From:       Mark Mitchell <mark () codesourcery ! com>
Date:       2007-01-29 21:16:26
Message-ID: 45BE642A.2020604 () codesourcery ! com
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Manuel López-Ibáñez wrote:

> 2007-01-14  Andrew Pinski  <pinskia@gmail.com>
>                    Manuel Lopez-Ibanez  <manu@gcc.gnu.org>
> 
>  PR c/21438
>  * gcc/c-typeck.c (build_binary_op): Don't give division by zero
> warning if integer zero is promoted to REAL_TYPE.
> 
> testsuite:
> 2007-01-14  Andrew Pinski  <pinskia@gmail.com>
>                    Manuel Lopez-Ibanez  <manu@gcc.gnu.org>
> 
>  PR c/21438
>  * gcc.dg/Wdiv-by-zero.c: New.

I'll let a C maintainer review these bits.

> The C++ front-end, on the contrary, warns always. Is this an
inconsistency?

Yes, I think the two front ends should behave the same in this respect.

Thanks,

-- 
Mark Mitchell
CodeSourcery
mark@codesourcery.com
(650) 331-3385 x713
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