diff --git a/lib/CodeGen/MachineScheduler.cpp b/lib/CodeGen/MachineScheduler.cpp
index b3e38f6..cc7aabd 100644
--- a/lib/CodeGen/MachineScheduler.cpp
+++ b/lib/CodeGen/MachineScheduler.cpp
@@ -674,6 +674,8 @@
     std::pair<MachineInstr *, MachineInstr *> P = *prior(DI);
     MachineInstr *DbgValue = P.first;
     MachineBasicBlock::iterator OrigPrevMI = P.second;
+    if (&*RegionBegin == DbgValue)
+      ++RegionBegin;
     BB->splice(++OrigPrevMI, BB, DbgValue);
     if (OrigPrevMI == llvm::prior(RegionEnd))
       RegionEnd = DbgValue;