Add a testcase from pr16244.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183433 91177308-0d34-0410-b5e6-96231b3b80d8
ARM sched model: Cortex A9 - More InstRW sched resources

Add more InstRW mappings.

Reapply 183266.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183435 91177308-0d34-0410-b5e6-96231b3b80d8
ARM sched model: Add integer arithmetic instructions on Swift

Reapply 183267.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183436 91177308-0d34-0410-b5e6-96231b3b80d8