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Re: GCC feature req: warn when bitops exceed type size (was: conntrack untracked match is broken)

From: Manuel López-Ibáñez <lopezibanez at gmail dot com>
To: Richard Guenther <richard dot guenther at gmail dot com>
Cc: Jan Engelhardt <jengelh at medozas dot de>, gcc at gnu dot org
Date: Mon, 29 Jun 2009 16:09:50 +0200
Subject: Re: GCC feature req: warn when bitops exceed type size (was: conntrack untracked match is broken)
References: <alpine.LSU.2.00.0906291506130.21909@fbirervta.pbzchgretzou.qr> <84fc9c000906290613pe17c15ax879d1c52731e1b94@mail.gmail.com>

2009/6/29 Richard Guenther <richard.guenther@gmail.com>:
> On Mon, Jun 29, 2009 at 3:10 PM, Jan Engelhardt<jengelh@medozas.de> wrote:
>> Hi gcc list,
>>
>>
>> I am forwarding below's bugreport here(*), to implicitly make aware
>> of a feature that I deem important to have in a future gcc.
>>
>
> -Wconversion should say
>
> t.c:4: warning: conversion to ‘unsigned char’ from ‘int’ may alter its value

From GCC 4.4.0 it says:

bug.c:6: warning: conversion to ‘uint8_t’ from ‘int’ may alter its value

More info abut new Wconversion: http://gcc.gnu.org/wiki/NewWconversion

Cheers,

Manuel.

Follow-Ups:
- Re: GCC feature req: warn when bitops exceed type size (was: conntrack untracked match is broken)
  - From: Jan Engelhardt

References:
- GCC feature req: warn when bitops exceed type size (was: conntrack untracked match is broken)
  - From: Jan Engelhardt
- Re: GCC feature req: warn when bitops exceed type size (was: conntrack untracked match is broken)
  - From: Richard Guenther

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