[Bug target/71124] Compiler enters infinite loop on Microblaze with -O1/-O2/-O3

[thomas.petazzoni@free-electrons.com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71124

--- Comment #2 from Thomas Petazzoni <thomas.petazzoni@free-electrons.com> ---
Created attachment 39970
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=39970&action=edit
Another test case demonstration the problem

This additional test case comes from ffmpeg 3.2. This file builds fine with
-Os, but makes the compiler use 100% CPU time indefinitely with -O1, -O2 or
-O3.