[Bug tree-optimization/90332] New test case gcc.dg/vect/slp-reduc-sad-2.c in r270847 fails

[seurer at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90332

--- Comment #4 from seurer at gcc dot gnu.org ---
This still fails (just on power 9) even with the above change.  On all the
other powerpc64 targets it comes up as unsupported.