[Bug tree-optimization/60115] [4.9 Regression] wrong code at -O3 on x86_64-linux-gnu

[su at cs dot ucdavis.edu]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60115

--- Comment #6 from Zhendong Su <su at cs dot ucdavis.edu> ---
So, it's also a 4.8 regression.