Index: llvm/trunk/lib/Transforms/Utils/AddDiscriminators.cpp
===================================================================
--- llvm/trunk/lib/Transforms/Utils/AddDiscriminators.cpp
+++ llvm/trunk/lib/Transforms/Utils/AddDiscriminators.cpp
@@ -222,6 +222,8 @@
         continue;
 
       DILocation *CurrentDIL = Current->getDebugLoc();
+      if (!CurrentDIL)
+        continue;
       Location L =
           std::make_pair(CurrentDIL->getFilename(), CurrentDIL->getLine());
       if (!CallLocations.insert(L).second) {