[Bug tree-optimization/66868] [5/6 Regression] wrong code generated with -O3 (dead code removal?)

[wschmidt at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66868

--- Comment #8 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Same experiment with r222218 from 2015-04-18.  Same results.

At this point I can't reproduce anything from the information given.  Do you
have any local modifications that could be causing this?