[Bug tree-optimization/70130] [6 Regression] h264ref fails with verification error starting with r231674

[pthaugen at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70130

--- Comment #2 from Pat Haugen <pthaugen at gcc dot gnu.org> ---
The benchmark behaves the same on BE/LE, passes with -mcpu=power8, fails with
-mcpu=power7.