Add braces

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190490 91177308-0d34-0410-b5e6-96231b3b80d8
Teach loop-idiom about address space pointer sizes

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190491 91177308-0d34-0410-b5e6-96231b3b80d8