This is the mail archive of the gcc@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: varargs, 64-bit targets, and strict-aliasing warnings

From: Segher Boessenkool <segher at kernel dot crashing dot org>
To: Andreas Schwab <schwab at suse dot de>
Cc: gcc at gcc dot gnu dot org, Roland Dreier <roland at topspin dot com>
Date: Fri, 27 Aug 2004 10:58:44 +0200
Subject: Re: varargs, 64-bit targets, and strict-aliasing warnings
References: <52hdqpa2fp.fsf@topspin.com> <Pine.LNX.4.61.0408262351130.23997@digraph.polyomino.org.uk> <521xht9qyu.fsf@topspin.com> <jebrgxkm0l.fsf@sykes.suse.de>

Pointers to void and char can alias everything, forcing the compiler to
drop some optimisations.

Pointers don't alias; it's the objects they point to that do.

Only character types can alias everything; not "void types".

Segher

References:
- varargs, 64-bit targets, and strict-aliasing warnings
  - From: Roland Dreier
- Re: varargs, 64-bit targets, and strict-aliasing warnings
  - From: Joseph S. Myers
- Re: varargs, 64-bit targets, and strict-aliasing warnings
  - From: Roland Dreier
- Re: varargs, 64-bit targets, and strict-aliasing warnings
  - From: Andreas Schwab

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