1 files changed, 5 insertions, 2 deletions
diff --git a/lib/Lex/HeaderMap.cpp b/lib/Lex/HeaderMap.cpp
index e424f91655..90ed184a57 100644
--- a/lib/Lex/HeaderMap.cpp
+++ b/lib/Lex/HeaderMap.cpp
@@ -199,8 +199,9 @@ void HeaderMap::dump() const {
 
 /// LookupFile - Check to see if the specified relative filename is located in
 /// this HeaderMap.  If so, open it and return its FileEntry.
-const FileEntry *HeaderMap::LookupFile(llvm::StringRef Filename,
-                                       FileManager &FM) const {
+const FileEntry *HeaderMap::LookupFile(
+    llvm::StringRef Filename, FileManager &FM,
+    llvm::SmallVectorImpl<char> *RawPath) const {
   const HMapHeader &Hdr = getHeader();
   unsigned NumBuckets = getEndianAdjustedWord(Hdr.NumBuckets);
 
@@ -223,6 +224,8 @@ const FileEntry *HeaderMap::LookupFile(llvm::StringRef Filename,
     llvm::SmallString<1024> DestPath;
     DestPath += getString(B.Prefix);
     DestPath += getString(B.Suffix);
+    if (RawPath != NULL)
+      *RawPath = DestPath;
     return FM.getFile(DestPath.str());
   }
 }