diff --git a/lib/Frontend/RewriteObjC.cpp b/lib/Frontend/RewriteObjC.cpp
index 8889003..79aecce 100644
--- a/lib/Frontend/RewriteObjC.cpp
+++ b/lib/Frontend/RewriteObjC.cpp
@@ -706,9 +706,9 @@
 
 void RewriteObjC::RewriteInclude() {
   SourceLocation LocStart = SM->getLocForStartOfFile(MainFileID);
-  std::pair<const char*, const char*> MainBuf = SM->getBufferData(MainFileID); 
-  const char *MainBufStart = MainBuf.first;
-  const char *MainBufEnd = MainBuf.second;
+  llvm::StringRef MainBuf = SM->getBufferData(MainFileID);
+  const char *MainBufStart = MainBuf.begin();
+  const char *MainBufEnd = MainBuf.end();
   size_t ImportLen = strlen("import");
 
   // Loop over the whole file, looking for includes.
@@ -731,9 +731,9 @@
 }
 
 void RewriteObjC::RewriteTabs() {
-  std::pair<const char*, const char*> MainBuf = SM->getBufferData(MainFileID);
-  const char *MainBufStart = MainBuf.first;
-  const char *MainBufEnd = MainBuf.second;
+  llvm::StringRef MainBuf = SM->getBufferData(MainFileID);
+  const char *MainBufStart = MainBuf.begin();
+  const char *MainBufEnd = MainBuf.end();
 
   // Loop over the whole file, looking for tabs.
   for (const char *BufPtr = MainBufStart; BufPtr != MainBufEnd; ++BufPtr) {
@@ -973,7 +973,6 @@
 }
 
 void RewriteObjC::RewriteProtocolDecl(ObjCProtocolDecl *PDecl) {
-  std::pair<const char*, const char*> MainBuf = SM->getBufferData(MainFileID);
   SourceLocation LocStart = PDecl->getLocStart();
 
   // FIXME: handle protocol headers that are declared across multiple lines.
diff --git a/lib/Frontend/TextDiagnosticPrinter.cpp b/lib/Frontend/TextDiagnosticPrinter.cpp
index 946a6ca..24d51e2 100644
--- a/lib/Frontend/TextDiagnosticPrinter.cpp
+++ b/lib/Frontend/TextDiagnosticPrinter.cpp
@@ -331,13 +331,10 @@
 
   // Get information about the buffer it points into.
   bool Invalid = false;
-  std::pair<const char*, const char*> BufferInfo = SM.getBufferData(FID, 
-                                                                    &Invalid);
+  const char *BufStart = SM.getBufferData(FID, &Invalid).data();
   if (Invalid)
     return;
-  
-  const char *BufStart = BufferInfo.first;
-  
+
   unsigned ColNo = SM.getColumnNumber(FID, FileOffset);
   unsigned CaretEndColNo
     = ColNo + Lexer::MeasureTokenLength(Loc, SM, *LangOpts);