https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77550
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |rguenth at gcc dot gnu.org
--- Comment #10 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Bernd Edlinger from comment #9)
> I'm unable to reduce the test case...
>
>
> The deque_iterator has these members:
>
> _Elt_pointer _M_cur;
> _Elt_pointer _M_first;
> _Elt_pointer _M_last;
> _Map_pointer _M_node;
>
> the first 3 elements have alias set 12
> while _M_node has alias set 13.
>
> when all 4 elements are assigned that becomes
> 2 vector statements, but all use alias set 12.
The vector stores should have become the aliasing set of the struct instead as
suggested on the store widening patch.
