Re-land "[AArch64][GlobalISel] Implement partial support for G_SHUFFLE_VECTOR""

Thanks to Richard Trieu for pointing out that the failures were due to a
use-after-free of an ArrayRef.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@354616 91177308-0d34-0410-b5e6-96231b3b80d8
5 files changed