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

[pinskia at gcc dot gnu.org]

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

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to java4ada from comment #2)
> I don't know if ABI dictates it but from observation the stack is aligned to
> 8-byte for the largest primitive type "double" (or long long). 

I think this is wrong the alignment requirement for arm-eabi is 16 byte IIRC
(so neon can be supported).