https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63691
--- Comment #2 from Jeffrey A. Law <law at redhat dot com> --- I don't see how that change could possibly cause the kind of failures you're showing. It's got to be something else. I would also strongly suggest trying with the latest gcc-4.9.x release as Jakub has bundled many fixes into those point releases since gcc-4.9 was initially released.
