The AdvSIMD pass may produce copies that are not coalescer-friendly. The
peephole optimizer knows how to fix that as demonstrated in the test case.
<rdar://problem/12702965>
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@216200 91177308-0d34-0410-b5e6-96231b3b80d8