Fix typo

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188915 91177308-0d34-0410-b5e6-96231b3b80d8
Use attribute helper function

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188916 91177308-0d34-0410-b5e6-96231b3b80d8
Add enforce known alignment test with address space

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188917 91177308-0d34-0410-b5e6-96231b3b80d8