MISched: Fix moving stores across barriers

This fixes an issue with ScheduleDAGInstrs::buildSchedGraph
where stores without an underlying object would not be added
as a predecessor to the current BarrierChain.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@223717 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed