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From: "vogt at linux dot vnet.ibm.com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/60337] s390: Function arguments are not aligned
Date: Wed, 26 Feb 2014 08:34:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60337

--- Comment #5 from Dominik Vogt <vogt at linux dot vnet.ibm.com> ---
With -O2 and -O3 all three cases generate the proper alignment
With -O1 only foo() has the proper alignment
With -O0 none of the cases has the proper alignment

==> Code compiled with -O0 and -O3 accidentally uses a different ABI.

Power shows the same erratic behaviour, on amd64 alignment works with all
-O{0,1,2,3}.