[Bug tree-optimization/70130] [6 Regression] h264ref fails with verification error starting with r231674 (r224221 is the true start of the problem)

[amodra at gmail dot com]

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

--- Comment #24 from Alan Modra <amodra at gmail dot com> ---
Created attachment 38266
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=38266&action=edit
testcase for gcc.dg/vect/

Revised testcase checking multiple offsets, using an array of structs so not
dependent on var layout.