1 files changed, 6 insertions, 0 deletions
diff --git a/clang/lib/Basic/SourceLocation.cpp b/clang/lib/Basic/SourceLocation.cpp
index 2ff1797..fde1399 100644
--- a/clang/lib/Basic/SourceLocation.cpp
+++ b/clang/lib/Basic/SourceLocation.cpp
@@ -15,6 +15,7 @@
 #include "clang/Basic/PrettyStackTrace.h"
 #include "clang/Basic/SourceManager.h"
 #include "llvm/ADT/DenseMapInfo.h"
+#include "llvm/ADT/FoldingSet.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/Support/Compiler.h"
 #include "llvm/Support/MemoryBuffer.h"
@@ -45,6 +46,11 @@ unsigned SourceLocation::getHashValue() const {
   return llvm::DenseMapInfo<unsigned>::getHashValue(ID);
 }
 
+void llvm::FoldingSetTrait<SourceLocation>::Profile(
+    const SourceLocation &X, llvm::FoldingSetNodeID &ID) {
+  ID.AddInteger(X.ID);
+}
+
 void SourceLocation::print(raw_ostream &OS, const SourceManager &SM)const{
   if (!isValid()) {
     OS << "<invalid loc>";