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From: "fweimer at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/56726] i386: MALLOC_ABI_ALIGNMENT is too small (usually)
Date: Mon, 06 Apr 2015 16:28:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56726

--- Comment #12 from Florian Weimer <fweimer at redhat dot com> ---
(In reply to Chip Salzenberg from comment #11)
> Indeed, 16 is required by the ABI; see
> http://www.x86-64.org/documentation/abi.pdf page 12.  Only the SIMD __m256
> is bigger than 16, and there seems no end to Intel's extensions to SIMD
> registers, so holding at 16 seems like the Right Thing.

Even for allocations smaller than 16 bytes?