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From: "jamborm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/58041] Unaligned access to arrays in packed structure
Date: Tue, 06 Aug 2013 15:18:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58041

--- Comment #31 from Martin Jambor <jamborm at gcc dot gnu.org> ---
(In reply to Bernd Edlinger from comment #30)
> Hi Martin,
> 
> I have bootstrapped this patch for i686-pc-linux-gnu and have
> seen some "excess errors" in your test script:
> 
> /home/ed/gnu/gcc-4.9-20130728/gcc/testsuite/gcc.dg/torture/pr58041.c: In
> function 'foo':
> /home/ed/gnu/gcc-4.9-20130728/gcc/testsuite/gcc.dg/torture/pr58041.c:15:11:
> note: The ABI for passing parameters with 16-byte alignment has changed in
> GCC 4.6
> /home/ed/gnu/gcc-4.9-20130728/gcc/testsuite/gcc.dg/torture/pr58041.c:15:11:
> warning: SSE vector argument without SSE enabled changes the ABI [enabled by
> default]

I can't reproduce this with the -m32 flag on my x86_64... do you still
have the compiler built on an i686?  If so, could you try and make
function foo static in that testcase and see if the error goes away?
Thanks!