diff --git a/lib/Target/XCore/XCoreISelLowering.cpp b/lib/Target/XCore/XCoreISelLowering.cpp
index 5f3d93531f6..390be5c0350 100644
--- a/lib/Target/XCore/XCoreISelLowering.cpp
+++ b/lib/Target/XCore/XCoreISelLowering.cpp
@@ -1080,6 +1080,8 @@ XCoreTargetLowering::LowerCCCArguments(SDValue Chain,
 
   unsigned LRSaveSize = StackSlotSize;
 
+  // TODO: need to make copies of byVal arguments
+
   for (unsigned i = 0, e = ArgLocs.size(); i != e; ++i) {
 
     CCValAssign &VA = ArgLocs[i];