[Bug tree-optimization/58640] [4.9 Regression] wrong code (segfaults) at -O3 on x86_64-linux-gnu

[law at redhat dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58640

--- Comment #5 from Jeffrey A. Law <law at redhat dot com> ---
Fix going through bootstrap and regression testing.