[Bug debug/83758] ICE building gccgo on powerpc64le --with-cpu=power8

[acsawdey at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83758

--- Comment #14 from acsawdey at gcc dot gnu.org ---
I've narrowed this down a bit --- copying libcommon-target.a from the working
build on willow2 makes the build on genoa work, even with -O2. So it is
something in there. I'll continue narrowing that down to figure out tomorrow.