Move this to X86.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172651 91177308-0d34-0410-b5e6-96231b3b80d8
Make this test X86 only.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172652 91177308-0d34-0410-b5e6-96231b3b80d8