[Bug c++/57271] ARM: gcc generates insufficient alignment for memory passed as extra argument for function return large composite type

[rearnsha at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57271

--- Comment #4 from Richard Earnshaw <rearnsha at gcc dot gnu.org> ---
The ARM EABI only requires 8-byte alignment, as does Neon.