1 files changed, 4 insertions, 0 deletions
diff --git a/include/llvm/DebugInfo.h b/include/llvm/DebugInfo.h
index 372d367b70..c33a21d729 100644
--- a/include/llvm/DebugInfo.h
+++ b/include/llvm/DebugInfo.h
@@ -17,6 +17,7 @@
 #ifndef LLVM_DEBUGINFO_H
 #define LLVM_DEBUGINFO_H
 
+#include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/SmallPtrSet.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringRef.h"
@@ -45,6 +46,9 @@ namespace llvm {
   class DIType;
   class DIObjCProperty;
 
+  /// Map from a pair <unique type name, an unsigned flag> to MDNode.
+  typedef DenseMap<std::pair<StringRef, unsigned>, MDNode*> DITypeHashMap;
+
   /// DIDescriptor - A thin wraper around MDNode to access encoded debug info.
   /// This should not be stored in a container, because the underlying MDNode
   /// may change in certain situations.