Re: c/10360: __alignof__(double) answer 8

[Richard Henderson <rth@redhat.com>]

The following reply was made to PR c/10360; it has been noted by GNATS.

From: Richard Henderson <rth@redhat.com>
To: Richard Frith-Macdonald <richard@brainstorm.co.uk>
Cc: gcc-gnats@gcc.gnu.org, thoran@free.fr, nobody@gcc.gnu.org,
   gcc-prs@gcc.gnu.org, gcc-bugs@gcc.gnu.org, discuss-gnustep@gnu.org,
   rth@gcc.gnu.org, Frederic De Jaeger <dejaeger@free.fr>
Subject: Re: c/10360: __alignof__(double) answer 8
Date: Thu, 10 Apr 2003 01:00:00 -0700

 On Thu, Apr 10, 2003 at 06:06:44AM +0100, Richard Frith-Macdonald wrote:
 > It would be interesting to know in what sense the alignment is 
 > 'preferred'.
 
 In that it takes one less cycle to load that way?  In that that's
 how data gets aligned which isn't constrained by the ABI?
 
 > Shouldn't this either be fixed as Frederic suggests, or the documentation
 > be changed so that instead of saying 'preferred' it says 'misleading and
 > largely useless'
 
 And indeed, that's what we ALREADY say, except you didn't read it.
 To wit:
 
 	Some machines never actually require alignment; they allow
 	reference to any data type even at an odd addresses. For
 	these machines, __alignof__ reports the recommended alignment
 	of a type.
 
 
 r~