diff --git a/include/clang/AST/ASTDiagnostic.h b/include/clang/AST/ASTDiagnostic.h
index 6e36372..64e955e 100644
--- a/include/clang/AST/ASTDiagnostic.h
+++ b/include/clang/AST/ASTDiagnostic.h
@@ -44,7 +44,7 @@
       unsigned NumPrevArgs,
       SmallVectorImpl<char> &Output,
       void *Cookie,
-      SmallVectorImpl<intptr_t> &QualTypeVals);
+      ArrayRef<intptr_t> QualTypeVals);
 }  // end namespace clang
 
 #endif
diff --git a/include/clang/AST/DeclBase.h b/include/clang/AST/DeclBase.h
index 896b12f..72f82aa 100644
--- a/include/clang/AST/DeclBase.h
+++ b/include/clang/AST/DeclBase.h
@@ -961,7 +961,7 @@
   ///
   /// \returns the first/last pair of declarations.
   static std::pair<Decl *, Decl *>
-  BuildDeclChain(const SmallVectorImpl<Decl*> &Decls, bool FieldsAlreadyLoaded);
+  BuildDeclChain(ArrayRef<Decl*> Decls, bool FieldsAlreadyLoaded);
 
    DeclContext(Decl::Kind K)
      : DeclKind(K), ExternalLexicalStorage(false),
diff --git a/include/clang/Basic/Diagnostic.h b/include/clang/Basic/Diagnostic.h
index f9eaf99..3e54b43 100644
--- a/include/clang/Basic/Diagnostic.h
+++ b/include/clang/Basic/Diagnostic.h
@@ -289,7 +289,7 @@
       unsigned NumPrevArgs,
       SmallVectorImpl<char> &Output,
       void *Cookie,
-      SmallVectorImpl<intptr_t> &QualTypeVals);
+      ArrayRef<intptr_t> QualTypeVals);
   void *ArgToStringCookie;
   ArgToStringFnTy ArgToStringFn;
 
diff --git a/lib/AST/ASTDiagnostic.cpp b/lib/AST/ASTDiagnostic.cpp
index dd3be44..9e0a360 100644
--- a/lib/AST/ASTDiagnostic.cpp
+++ b/lib/AST/ASTDiagnostic.cpp
@@ -154,17 +154,16 @@
 ConvertTypeToDiagnosticString(ASTContext &Context, QualType Ty,
                               const DiagnosticsEngine::ArgumentValue *PrevArgs,
                               unsigned NumPrevArgs,
-                              SmallVectorImpl<intptr_t> &QualTypeVals) {
+                              ArrayRef<intptr_t> QualTypeVals) {
   // FIXME: Playing with std::string is really slow.
   bool ForceAKA = false;
   QualType CanTy = Ty.getCanonicalType();
   std::string S = Ty.getAsString(Context.getPrintingPolicy());
   std::string CanS = CanTy.getAsString(Context.getPrintingPolicy());
 
-  for (SmallVectorImpl<intptr_t>::iterator I = QualTypeVals.begin(),
-       E = QualTypeVals.end(); I != E; ++I) {
+  for (unsigned I = 0, E = QualTypeVals.size(); I != E; ++I) {
     QualType CompareTy =
-        QualType::getFromOpaquePtr(reinterpret_cast<void*>(*I));
+        QualType::getFromOpaquePtr(reinterpret_cast<void*>(QualTypeVals[I]));
     if (CompareTy == Ty)
       continue;  // Same types
     QualType CompareCanTy = CompareTy.getCanonicalType();
@@ -235,7 +234,7 @@
     unsigned NumPrevArgs,
     SmallVectorImpl<char> &Output,
     void *Cookie,
-    SmallVectorImpl<intptr_t> &QualTypeVals) {
+    ArrayRef<intptr_t> QualTypeVals) {
   ASTContext &Context = *static_cast<ASTContext*>(Cookie);
   
   std::string S;
diff --git a/lib/AST/DeclBase.cpp b/lib/AST/DeclBase.cpp
index efbc5f9..dbb0b6b 100644
--- a/lib/AST/DeclBase.cpp
+++ b/lib/AST/DeclBase.cpp
@@ -872,7 +872,7 @@
 }
 
 std::pair<Decl *, Decl *>
-DeclContext::BuildDeclChain(const SmallVectorImpl<Decl*> &Decls,
+DeclContext::BuildDeclChain(ArrayRef<Decl*> Decls,
                             bool FieldsAlreadyLoaded) {
   // Build up a chain of declarations via the Decl::NextInContextAndBits field.
   Decl *FirstNewDecl = 0;
diff --git a/lib/Basic/Diagnostic.cpp b/lib/Basic/Diagnostic.cpp
index c2631bb..4a63d97 100644
--- a/lib/Basic/Diagnostic.cpp
+++ b/lib/Basic/Diagnostic.cpp
@@ -27,7 +27,7 @@
                                unsigned NumPrevArgs,
                                SmallVectorImpl<char> &Output,
                                void *Cookie,
-                               SmallVectorImpl<intptr_t> &QualTypeVals) {
+                               ArrayRef<intptr_t> QualTypeVals) {
   const char *Str = "<can't format argument>";
   Output.append(Str, Str+strlen(Str));
 }
diff --git a/lib/Sema/SemaTemplateDeduction.cpp b/lib/Sema/SemaTemplateDeduction.cpp
index f2051e9..d6cfc1a 100644
--- a/lib/Sema/SemaTemplateDeduction.cpp
+++ b/lib/Sema/SemaTemplateDeduction.cpp
@@ -583,7 +583,7 @@
                             TemplateParameterList *TemplateParams,
                             bool HasAnyArguments,
                         SmallVectorImpl<DeducedTemplateArgument> &Deduced,
-                            const SmallVectorImpl<unsigned> &PackIndices,
+                            ArrayRef<unsigned> PackIndices,
                     SmallVectorImpl<DeducedTemplateArgument> &SavedPacks,
         SmallVectorImpl<
           SmallVector<DeducedTemplateArgument, 4> > &NewlyDeducedPacks,