[Bug target/58160] Power8 fusion support has a bug that shows up in running spec 2006

[meissner at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58160

--- Comment #3 from Michael Meissner <meissner at gcc dot gnu.org> ---
I forgot to mention, with this patch, I have built and successfully run 403.gcc
and 435.gromacs using the -O2 -m32 -mcpu=power7 -mtune=power8 options that
broke 403.gcc, and also with the -O3 -funroll-loops -m32 -mcpu=power7
-mtune=power8 that broke 435.gromacs.