[Bug tree-optimization/115278] [13/14/15 Regression] -ftree-vectorize optimizes away volatile write on x86_64 since r13-3219

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115278

--- Comment #7 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to avieira from comment #5)
> > I think we fixed similar bug on the read side.
> 
> I don't have the best memory, but the one I can remember is PR 111882, where
> we had the SAVE_EXPR. And the the fix was to not lower bitfields with
> non-constant offsets.

The one which Richard was thinking of was PR 114197 which I linked in the see
also.