[Bug libstdc++/120895] AVX data types default alignment is not correct

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120895

--- Comment #15 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The code in std::allocator<T>::allocate is:

#if __cpp_aligned_new && __cplusplus >= 201103L
        if (alignof(_Tp) > __STDCPP_DEFAULT_NEW_ALIGNMENT__)
          {
            std::align_val_t __al = std::align_val_t(alignof(_Tp));
            return static_cast<_Tp*>(_GLIBCXX_OPERATOR_NEW(__n * sizeof(_Tp),
                                                           __al));
          }
#endif
        return static_cast<_Tp*>(_GLIBCXX_OPERATOR_NEW(__n * sizeof(_Tp)));