Fixing compile warnings

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191844 91177308-0d34-0410-b5e6-96231b3b80d8
Clean up lli execution code

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191845 91177308-0d34-0410-b5e6-96231b3b80d8