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Re: Strict aliasing violation?

From: Jonathan Wakely <jwakely dot gcc at gmail dot com>
To: Ian Lance Taylor <iant at google dot com>
Cc: gcc-help <gcc-help at gcc dot gnu dot org>
Date: Tue, 11 Sep 2012 17:33:37 +0100
Subject: Re: Strict aliasing violation?
References: <CAH6eHdRDPu0XSHdF7HEA7exRFdbaQryheLFd9-XO4whBxiTG+g@mail.gmail.com> <CAKOQZ8zA_z2L2AoQ=WNOQtsyR1K1pNHSDNB4sDPDqyi8fYBu8g@mail.gmail.com>

On 11 September 2012 17:20, Ian Lance Taylor wrote:
>> Can the optimisers still cause this code to
>> do unexpected things, even though the diagnostic is absent?
>
> Yes.  You may get a warning at -Wstrict-aliasing=3.

I should have said, I tried 1, 2 and 3 but still didn't get a warning.

Thanks for confirming my understanding.

References:
- Strict aliasing violation?
  - From: Jonathan Wakely
- Re: Strict aliasing violation?
  - From: Ian Lance Taylor

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