[Bug c++/56597] unaligned local variable used by implicit sse instructions

[ktietz at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56597

--- Comment #5 from Kai Tietz <ktietz at gcc dot gnu.org> ---
Issue here is that x64 ABI just requires that stack has 16-byte alignment.
So that means within a function, using instruction requestion higher-alignment,
compiler should either make sure that for those instructions variables get
desired alignment, or that unaligned access is used.
Otherwise I don't see here a way to resolve that, especially in scenario that
code gets used by foreign compiler.