https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61458
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |paolo at gcc dot gnu.org
--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The problem is the default value of the _Align parameter, which comes from
alignof(__aligned_storage_msa<_Len>::__type) which is always the maximum
alignment:
template<size_t _Len>
struct __aligned_storage_msa
{
union __type
{
unsigned char __data[_Len];
struct __attribute__((__aligned__)) { } __align;
};
};
That effectively ignores _Len and will always have 16-byte alignment, which
means sizeof(aligned_storage<N>) is always at least 16 bytes.
Should the attribute be using __aligned__(_Len) or does that do the wrong thing
in some cases?
