diff --git a/lib/CodeGen/MachineInstr.cpp b/lib/CodeGen/MachineInstr.cpp
index d4a60bc..7bb6164 100644
--- a/lib/CodeGen/MachineInstr.cpp
+++ b/lib/CodeGen/MachineInstr.cpp
@@ -874,6 +874,15 @@
     }
   }
 
+  if (!debugLoc.isUnknown()) {
+    const MachineFunction *MF = getParent()->getParent();
+    DebugLocTuple DLT = MF->getDebugLocTuple(debugLoc);
+    OS << " [dbg: "
+       << DLT.Src  << ","
+       << DLT.Line << ","
+       << DLT.Col  << "]";
+  }
+
   OS << "\n";
 }