Temporarily XFAIL this test.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66866 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGPrinter.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGPrinter.cpp
index 0392338..9475ffa 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGPrinter.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGPrinter.cpp
@@ -179,8 +179,8 @@
     }
   } else if (const DbgStopPointSDNode *D = dyn_cast<DbgStopPointSDNode>(Node)) {
     DICompileUnit CU(cast<GlobalVariable>(D->getCompileUnit()));
-    std::string FN;
-    Op += ": " + CU.getFilename(FN);
+    const char *FN = CU.getFilename();
+    Op += ": " + std::string(FN ? FN : "");
     Op += ":" + utostr(D->getLine());
     if (D->getColumn() != 0)
       Op += ":" + utostr(D->getColumn());