1 files changed, 8 insertions, 0 deletions
diff --git a/include/llvm/ADT/StringRef.h b/include/llvm/ADT/StringRef.h
index d013d05623..c5f2632f4b 100644
--- a/include/llvm/ADT/StringRef.h
+++ b/include/llvm/ADT/StringRef.h
@@ -548,6 +548,14 @@ namespace llvm {
   template <typename T> struct isPodLike;
   template <> struct isPodLike<StringRef> { static const bool value = true; };
 
+  template <typename T> struct DenseMapInfo;
+  template<> struct DenseMapInfo<StringRef> {
+    static StringRef getEmptyKey() { return StringRef(); }
+    static StringRef getTombstoneKey() { return StringRef(" ", 0); }
+    static unsigned getHashValue(StringRef const val);
+    static bool isEqual(StringRef const lhs,
+                        StringRef const rhs) { return lhs.equals(rhs); }
+  };
 }
 
 #endif