properly encapsulate the parent field of MBB and MI with get/set accessors.

llvm-svn: 45469

1 files changed, 8 insertions, 6 deletions

diff --git a/llvm/lib/CodeGen/MachineFunction.cpp b/llvm/lib/CodeGen/MachineFunction.cpp
index 595159b15f2..3f2c1194863 100644
--- a/llvm/lib/CodeGen/MachineFunction.cpp
+++ b/llvm/lib/CodeGen/MachineFunction.cpp
@@ -111,12 +111,14 @@ MachineBasicBlock* ilist_traits<MachineBasicBlock>::createSentinel() {
 }
 
 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,