Access the subtarget off of the MachineFunction via the DAG
scheduler or via the SelectionDAG if available. Otherwise
grab the subtarget off of the MachineFunction by going up
the parent chain.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219666 91177308-0d34-0410-b5e6-96231b3b80d8
Add lld to the parallel set of directories since it doesn't depend
on any of the other tools directories.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219667 91177308-0d34-0410-b5e6-96231b3b80d8