Spill slots cannot alias.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84432 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/ScheduleDAGInstrs.h b/lib/CodeGen/ScheduleDAGInstrs.h
index 29e1c98..366c3a8 100644
--- a/lib/CodeGen/ScheduleDAGInstrs.h
+++ b/lib/CodeGen/ScheduleDAGInstrs.h
@@ -98,6 +98,7 @@
   class VISIBILITY_HIDDEN ScheduleDAGInstrs : public ScheduleDAG {
     const MachineLoopInfo &MLI;
     const MachineDominatorTree &MDT;
+    const MachineFrameInfo *MFI;
 
     /// Defs, Uses - Remember where defs and uses of each physical register
     /// are as we iterate upward through the instructions. This is allocated