[Bug target/85755] PowerPC Gcc's -mupdate produces inefficient code on power8/power9 machines

[segher at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85755

--- Comment #3 from Segher Boessenkool <segher at gcc dot gnu.org> ---
Sigh, i forgot -mcpu=power8 on that last test.

GCC 7 was just fine, stdu, everything.

GCC 8 was bad already.