[Bug target/89112] Incorrect code generated by rs6000 memcmp expansion

[acsawdey at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89112

--- Comment #9 from acsawdey at gcc dot gnu.org ---
The fixes for this are in trunk now. I will backport to gcc-8-branch in a week
and then this can be closed.