Split a couple of tests out into their own file.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@174921 91177308-0d34-0410-b5e6-96231b3b80d8
In ARC, emit non-peepholed +1s within the full-expression instead
of immediately afterwards.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@174922 91177308-0d34-0410-b5e6-96231b3b80d8