Reuse variable

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191712 91177308-0d34-0410-b5e6-96231b3b80d8
Use CHECK-LABEL

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191713 91177308-0d34-0410-b5e6-96231b3b80d8