[Bug tree-optimization/65450] [4.9/5 Regression]: Unaligned access with -O3 -mtune=k8

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65450

--- Comment #16 from Richard Biener <rguenth at gcc dot gnu.org> ---
I think DR_PTR_INFO is indeed for the base object and was supposed to preserve
points-to-info only.  Patch looks ok.