[Bug tree-optimization/59644] [4.9 Regression] r206243 miscompiles Linux kernel

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59644

--- Comment #18 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Markus Trippelsdorf from comment #17)
> If I add "pushq   %r10" and "popq    %r10" by hand, the kernel boots fine.

Is r10 used in th function? Please also try adjust
stack instead of push/pop.