http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52415
Richard Guenther <rguenth at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Last reconfirmed| |2012-02-28 Ever Confirmed|0 |1 --- Comment #1 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-02-28 11:45:04 UTC --- This is I believe because ARM is a STRICT_ALIGNMENT target and we thus do not transform the memcpy on the tree level. On the tree level nothing guarantees that 'p' is properly aligned.