Index: llvm/trunk/test/tools/llvm-pdbdump/Inputs/UsingNamespaceTest.cpp
===================================================================
--- llvm/trunk/test/tools/llvm-pdbdump/Inputs/UsingNamespaceTest.cpp
+++ llvm/trunk/test/tools/llvm-pdbdump/Inputs/UsingNamespaceTest.cpp
@@ -0,0 +1,11 @@
+// Compile with "cl /c /Zi /GR- UsingNamespaceTest.cpp"
+// Link with "link UsingNamespaceTest.obj /debug /nodefaultlib /entry:main"
+
+namespace NS {
+  int foo() { return 1; }
+}
+
+using namespace NS;
+int main(int argc, char **argv) {
+  return foo();
+}
Index: llvm/trunk/test/tools/llvm-pdbdump/usingnamespace.test
===================================================================
--- llvm/trunk/test/tools/llvm-pdbdump/usingnamespace.test
+++ llvm/trunk/test/tools/llvm-pdbdump/usingnamespace.test
@@ -0,0 +1,6 @@
+; RUN: llvm-pdbutil pretty -module-syms %p/Inputs/UsingNamespaceTest.pdb > %t
+; RUN: FileCheck -input-file=%t %s
+
+; CHECK: ---SYMBOLS---
+; CHECK-NEXT: {{.*}}UsingNamespaceTest.obj
+; CHECK-DAG: using namespace NS
Index: llvm/trunk/tools/llvm-pdbutil/PrettyCompilandDumper.h
===================================================================
--- llvm/trunk/tools/llvm-pdbutil/PrettyCompilandDumper.h
+++ llvm/trunk/tools/llvm-pdbutil/PrettyCompilandDumper.h
@@ -34,6 +34,7 @@
   void dump(const PDBSymbolThunk &Symbol) override;
   void dump(const PDBSymbolTypeTypedef &Symbol) override;
   void dump(const PDBSymbolUnknown &Symbol) override;
+  void dump(const PDBSymbolUsingNamespace &Symbol) override;
 
 private:
   LinePrinter &Printer;
Index: llvm/trunk/tools/llvm-pdbutil/PrettyCompilandDumper.cpp
===================================================================
--- llvm/trunk/tools/llvm-pdbutil/PrettyCompilandDumper.cpp
+++ llvm/trunk/tools/llvm-pdbutil/PrettyCompilandDumper.cpp
@@ -28,6 +28,7 @@
 #include "llvm/DebugInfo/PDB/PDBSymbolThunk.h"
 #include "llvm/DebugInfo/PDB/PDBSymbolTypeFunctionSig.h"
 #include "llvm/DebugInfo/PDB/PDBSymbolUnknown.h"
+#include "llvm/DebugInfo/PDB/PDBSymbolUsingNamespace.h"
 #include "llvm/Support/Format.h"
 #include "llvm/Support/Path.h"
 #include "llvm/Support/raw_ostream.h"
@@ -216,3 +217,13 @@
   Printer.NewLine();
   Printer << "unknown (" << Symbol.getSymTag() << ")";
 }
+
+void CompilandDumper::dump(const PDBSymbolUsingNamespace &Symbol) {
+  if (Printer.IsSymbolExcluded(Symbol.getName()))
+    return;
+
+  Printer.NewLine();
+  Printer << "using namespace ";
+  std::string Name = Symbol.getName();
+  WithColor(Printer, PDB_ColorItem::Identifier).get() << Name;
+}