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From: bangerth@dealii.org
To: gcc-bugs@gcc.gnu.org, gcc-prs@gcc.gnu.org, hagen@equator.com,
	nobody@gcc.gnu.org
Subject: Re: c/9932: alignment of long long in struct seems to be wrong
Date: Tue, 04 Mar 2003 15:30:00 -0000	[thread overview]
Message-ID: <20030304153049.29718.qmail@sources.redhat.com> (raw)

Old Synopsis: alignment of 64-bit type in struct seems to be wrong
New Synopsis: alignment of long long in struct seems to be wrong

State-Changed-From-To: open->feedback
State-Changed-By: bangerth
State-Changed-When: Tue Mar  4 15:30:49 2003
State-Changed-Why:
    This is indeed weird: 2.95 returns an alignment of 4,
    while subsequent compilers indicate 8 for long long:
    g/x> gcc x.c ; ./a.out
    12 16
    4 8 4
    g/x> /home/bangerth/bin/gcc-3.0.4/bin/gcc x.c ; ./a.out
    12 16
    4 8 8
    g/x>
    g/x>
    g/x> /home/bangerth/bin/gcc-3.2.2-pre/bin/gcc x.c ; ./a.out
    12 16
    4 8 8
    g/x> /home/bangerth/bin/gcc-3.3-pre/bin/gcc x.c ; ./a.out
    12 16
    4 8 8
    g/x> /home/bangerth/bin/gcc-3.4-pre/bin/gcc x.c ; ./a.out
    12 16
    4 8 8
    
    icc7 returns 4 as well:
    g/x> icc x.c ; ./a.out
    12 16
    4 8 4
    
    Do you know whether there are formal specifications for
    x86 linux (an ABI) dictating the correct alignment?
    
    Wolfgang

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=9932


             reply	other threads:[~2003-03-04 15:30 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-03-04 15:30 bangerth [this message]
2003-03-04 18:06 Hagen Last
2003-03-16  8:31 rth

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