This is the mail archive of the gcc-help@gcc.gnu.org mailing list for the GCC project.

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]
Other format:	[Raw text]

Re: Strict aliasing violation?

From: Ian Lance Taylor <iant at google dot com>
To: gcc-help <gcc-help at gcc dot gnu dot org>
Cc: Jonathan Wakely <jwakely dot gcc at gmail dot com>
Date: Tue, 11 Sep 2012 09:22:07 -0700
Subject: Re: Strict aliasing violation?
References: <CAH6eHdRDPu0XSHdF7HEA7exRFdbaQryheLFd9-XO4whBxiTG+g@mail.gmail.com> <alpine.DEB.2.02.1209111704090.3705@laptop-mg.saclay.inria.fr>

On Tue, Sep 11, 2012 at 8:06 AM, Marc Glisse <marc.glisse@inria.fr> wrote:
>
> I thought char was the type that can alias anything (so the optimizer stays
> clear).

Not quite.  A char* pointer can alias anything.  The original code is
using a char[64] array; that type is not special when it comes to
aliasing.

Ian

References:
- Strict aliasing violation?
  - From: Jonathan Wakely
- Re: Strict aliasing violation?
  - From: Marc Glisse

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]