diff --git a/lib/CodeGen/MachineFunction.cpp b/lib/CodeGen/MachineFunction.cpp
index 595159b..3f2c119 100644
--- a/lib/CodeGen/MachineFunction.cpp
+++ b/lib/CodeGen/MachineFunction.cpp
@@ -111,12 +111,14 @@
 }
 
 void ilist_traits<MachineBasicBlock>::transferNodesFromList(
-  iplist<MachineBasicBlock, ilist_traits<MachineBasicBlock> >& toList,
-  ilist_iterator<MachineBasicBlock> first,
-  ilist_iterator<MachineBasicBlock> last) {
-  if (Parent != toList.Parent)
-    for (; first != last; ++first)
-      first->Parent = toList.Parent;
+            iplist<MachineBasicBlock, ilist_traits<MachineBasicBlock> >& toList,
+            ilist_iterator<MachineBasicBlock> first,
+            ilist_iterator<MachineBasicBlock> last) {
+  // If splicing withing the same function, no change.
+  if (Parent == toList.Parent) return;
+  
+  for (; first != last; ++first)
+    first->setParent(toList.Parent);
 }
 
 MachineFunction::MachineFunction(const Function *F,