[Power9] Disable removing extra swaps on P9.
On power 8 we sometimes insert swaps to deal with the difference between
Little-Endian and Big-Endian. The swap removal pass is supposed to clean up
these swaps. On power 9 we don't need this pass since we do not need to insert
the swaps in the first place.
Commiting on behalf of Stefan Pintilie.
Differential Revision: https://reviews.llvm.org/D34627
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@307185 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed