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

[amodra at gmail dot com]

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

--- Comment #11 from Alan Modra <amodra at gmail dot com> ---
Created attachment 38250
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38250&action=edit
stand alone testcase

Compile with -m64 -O3 -mcpu=power7 -fno-common