[PowerPC] Don't miscompile rotate+mask into an ANDIo if it can't recreate the immediate

I'm not even sure if this transform is ever worth it, but this at least
stops the bleeding.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@322373 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed