[Bug tree-optimization/61493] Bug exposed by speculative devirtualizing

[wmi at google dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61493

--- Comment #1 from wmi at google dot com ---
Created attachment 32931
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=32931&action=edit
testcase