[Bug tree-optimization/59221] [4.9 Regression] wrong code at -O2 and -O3 on x86_64-linux-gnu

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59221

--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> ---
It is caused by r205074.