[AArch64] Expand testing of zero cycle zeroing

Make sure that r321824 doesn't change zeroing.

Differential revision: https://reviews.llvm.org/D42089

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@323816 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed