diff --git a/include/clang/Parse/Parser.h b/include/clang/Parse/Parser.h
index 5e80ca3..f11b7fa 100644
--- a/include/clang/Parse/Parser.h
+++ b/include/clang/Parse/Parser.h
@@ -1411,8 +1411,16 @@
   //===--------------------------------------------------------------------===//
   // C99 6.8: Statements and Blocks.
 
+  /// A SmallVector of statements, with stack size 32 (as that is the only one
+  /// used.)
+  typedef SmallVector<Stmt*, 32> StmtVector;
+  /// A SmallVector of expressions, with stack size 12 (the maximum used.)
+  typedef SmallVector<Expr*, 12> ExprVector;
+  /// A SmallVector of types.
+  typedef SmallVector<ParsedType, 12> TypeVector;
+
   StmtResult ParseStatement(SourceLocation *TrailingElseLoc = 0) {
-    StmtVector Stmts(Actions);
+    StmtVector Stmts;
     return ParseStatementOrDeclaration(Stmts, true, TrailingElseLoc);
   }
   StmtResult ParseStatementOrDeclaration(StmtVector &Stmts,
diff --git a/include/clang/Sema/Ownership.h b/include/clang/Sema/Ownership.h
index 84d55f4..190ceb7 100644
--- a/include/clang/Sema/Ownership.h
+++ b/include/clang/Sema/Ownership.h
@@ -239,36 +239,11 @@
     const PtrTy &operator[](unsigned Arg) const { return Nodes[Arg]; }
   };
 
-  /// \brief A small vector that owns a set of AST nodes.
-  template <class PtrTy, unsigned N = 8>
-  class ASTOwningVector : public SmallVector<PtrTy, N> {
-    ASTOwningVector(ASTOwningVector &); // do not implement
-    ASTOwningVector &operator=(ASTOwningVector &); // do not implement
-
-  public:
-    explicit ASTOwningVector(Sema &Actions)
-    { }
-
-    PtrTy *take() {
-      return &this->front();
-    }
-
-    template<typename T> T **takeAs() { return reinterpret_cast<T**>(take()); }
-  };
-
   /// An opaque type for threading parsed type information through the
   /// parser.
   typedef OpaquePtr<QualType> ParsedType;
   typedef UnionOpaquePtr<QualType> UnionParsedType;
 
-  /// A SmallVector of statements, with stack size 32 (as that is the only one
-  /// used.)
-  typedef ASTOwningVector<Stmt*, 32> StmtVector;
-  /// A SmallVector of expressions, with stack size 12 (the maximum used.)
-  typedef ASTOwningVector<Expr*, 12> ExprVector;
-  /// A SmallVector of types.
-  typedef ASTOwningVector<ParsedType, 12> TypeVector;
-
   // We can re-use the low bit of expression, statement, base, and
   // member-initializer pointers for the "invalid" flag of
   // ActionResult.
diff --git a/include/clang/Sema/Sema.h b/include/clang/Sema/Sema.h
index 996ce06..f4ca2f8 100644
--- a/include/clang/Sema/Sema.h
+++ b/include/clang/Sema/Sema.h
@@ -3554,7 +3554,7 @@
   bool CompleteConstructorCall(CXXConstructorDecl *Constructor,
                                MultiExprArg ArgsPtr,
                                SourceLocation Loc,
-                               ASTOwningVector<Expr*> &ConvertedArgs,
+                               SmallVectorImpl<Expr*> &ConvertedArgs,
                                bool AllowExplicit = false);
 
   ParsedType getDestructorName(SourceLocation TildeLoc,
diff --git a/lib/Parse/ParseDecl.cpp b/lib/Parse/ParseDecl.cpp
index 2638e12..b6666fb 100644
--- a/lib/Parse/ParseDecl.cpp
+++ b/lib/Parse/ParseDecl.cpp
@@ -236,7 +236,7 @@
     break;
   }
 
-  ExprVector ArgExprs(Actions);
+  ExprVector ArgExprs;
 
   if (!BuiltinType &&
       (ParmLoc.isValid() ? Tok.is(tok::comma) : Tok.isNot(tok::r_paren))) {
@@ -279,7 +279,7 @@
   if (!ExpectAndConsume(tok::r_paren, diag::err_expected_rparen)) {
     AttributeList *attr =
       Attrs.addNew(AttrName, SourceRange(AttrNameLoc, RParen), 0, AttrNameLoc,
-                   ParmName, ParmLoc, ArgExprs.take(), ArgExprs.size(),
+                   ParmName, ParmLoc, ArgExprs.data(), ArgExprs.size(),
                    AttributeList::AS_GNU);
     if (BuiltinType && attr->getKind() == AttributeList::AT_IBOutletCollection)
       Diag(Tok, diag::err_iboutletcollection_builtintype);
@@ -1003,7 +1003,7 @@
   BalancedDelimiterTracker T(*this, tok::l_paren);
   T.consumeOpen();
 
-  ExprVector ArgExprs(Actions);
+  ExprVector ArgExprs;
   bool ArgExprsOk = true;
 
   // now parse the list of expressions
@@ -1023,7 +1023,7 @@
   // Match the ')'.
   if (ArgExprsOk && !T.consumeClose()) {
     Attrs.addNew(&AttrName, AttrNameLoc, 0, AttrNameLoc, 0, SourceLocation(),
-                 ArgExprs.take(), ArgExprs.size(), AttributeList::AS_GNU);
+                 ArgExprs.data(), ArgExprs.size(), AttributeList::AS_GNU);
   }
   if (EndLoc)
     *EndLoc = T.getCloseLocation();
@@ -1665,7 +1665,7 @@
     BalancedDelimiterTracker T(*this, tok::l_paren);
     T.consumeOpen();
 
-    ExprVector Exprs(Actions);
+    ExprVector Exprs;
     CommaLocsTy CommaLocs;
 
     if (getLangOpts().CPlusPlus && D.getCXXScopeSpec().isSet()) {
@@ -2074,13 +2074,13 @@
     return;
   }
 
-  ExprVector ArgExprs(Actions);
+  ExprVector ArgExprs;
   ArgExprs.push_back(ArgExpr.release());
   // FIXME: This should not be GNU, but we since the attribute used is
   //        based on the spelling, and there is no true spelling for
   //        C++11 attributes, this isn't accepted.
   Attrs.addNew(PP.getIdentifierInfo("aligned"), KWLoc, 0, KWLoc,
-               0, T.getOpenLocation(), ArgExprs.take(), 1,
+               0, T.getOpenLocation(), ArgExprs.data(), 1,
                AttributeList::AS_GNU);
 }
 
diff --git a/lib/Parse/ParseDeclCXX.cpp b/lib/Parse/ParseDeclCXX.cpp
index d8fcd56..6790011 100644
--- a/lib/Parse/ParseDeclCXX.cpp
+++ b/lib/Parse/ParseDeclCXX.cpp
@@ -2571,7 +2571,7 @@
     T.consumeOpen();
 
     // Parse the optional expression-list.
-    ExprVector ArgExprs(Actions);
+    ExprVector ArgExprs;
     CommaLocsTy CommaLocs;
     if (Tok.isNot(tok::r_paren) && ParseExpressionList(ArgExprs, CommaLocs)) {
       SkipUntil(tok::r_paren);
@@ -2586,7 +2586,7 @@
 
     return Actions.ActOnMemInitializer(ConstructorDecl, getCurScope(), SS, II,
                                        TemplateTypeTy, DS, IdLoc,
-                                       T.getOpenLocation(), ArgExprs.take(),
+                                       T.getOpenLocation(), ArgExprs.data(),
                                        ArgExprs.size(), T.getCloseLocation(),
                                        EllipsisLoc);
   }
diff --git a/lib/Parse/ParseExpr.cpp b/lib/Parse/ParseExpr.cpp
index 6c4d6fb..8df08b8 100644
--- a/lib/Parse/ParseExpr.cpp
+++ b/lib/Parse/ParseExpr.cpp
@@ -1341,7 +1341,7 @@
       BalancedDelimiterTracker PT(*this, tok::l_paren);
 
       if (OpKind == tok::lesslessless) {
-        ExprVector ExecConfigExprs(Actions);
+        ExprVector ExecConfigExprs;
         CommaLocsTy ExecConfigCommaLocs;
         SourceLocation OpenLoc = ConsumeToken();
 
@@ -1384,7 +1384,7 @@
         Loc = PT.getOpenLocation();
       }
 
-      ExprVector ArgExprs(Actions);
+      ExprVector ArgExprs;
       CommaLocsTy CommaLocs;
       
       if (Tok.is(tok::code_completion)) {
@@ -2093,7 +2093,7 @@
     // Parse the expression-list.
     InMessageExpressionRAIIObject InMessage(*this, false);
     
-    ExprVector ArgExprs(Actions);
+    ExprVector ArgExprs;
     CommaLocsTy CommaLocs;
 
     if (!ParseExpressionList(ArgExprs, CommaLocs)) {
@@ -2211,8 +2211,8 @@
   }
 
   SourceLocation DefaultLoc;
-  TypeVector Types(Actions);
-  ExprVector Exprs(Actions);
+  TypeVector Types;
+  ExprVector Exprs;
   while (1) {
     ParsedType Ty;
     if (Tok.is(tok::kw_default)) {
diff --git a/lib/Parse/ParseExprCXX.cpp b/lib/Parse/ParseExprCXX.cpp
index c182342..953e74b 100644
--- a/lib/Parse/ParseExprCXX.cpp
+++ b/lib/Parse/ParseExprCXX.cpp
@@ -1251,7 +1251,7 @@
     BalancedDelimiterTracker T(*this, tok::l_paren);
     T.consumeOpen();
 
-    ExprVector Exprs(Actions);
+    ExprVector Exprs;
     CommaLocsTy CommaLocs;
 
     if (Tok.isNot(tok::r_paren)) {
@@ -2215,7 +2215,7 @@
   // A '(' now can be a new-placement or the '(' wrapping the type-id in the
   // second form of new-expression. It can't be a new-type-id.
 
-  ExprVector PlacementArgs(Actions);
+  ExprVector PlacementArgs;
   SourceLocation PlacementLParen, PlacementRParen;
 
   SourceRange TypeIdParens;
@@ -2285,7 +2285,7 @@
 
   if (Tok.is(tok::l_paren)) {
     SourceLocation ConstructorLParen, ConstructorRParen;
-    ExprVector ConstructorArgs(Actions);
+    ExprVector ConstructorArgs;
     BalancedDelimiterTracker T(*this, tok::l_paren);
     T.consumeOpen();
     ConstructorLParen = T.getOpenLocation();
diff --git a/lib/Parse/ParseInit.cpp b/lib/Parse/ParseInit.cpp
index 3aadd26..5835175 100644
--- a/lib/Parse/ParseInit.cpp
+++ b/lib/Parse/ParseInit.cpp
@@ -405,7 +405,7 @@
 
   /// InitExprs - This is the actual list of expressions contained in the
   /// initializer.
-  ExprVector InitExprs(Actions);
+  ExprVector InitExprs;
 
   if (Tok.is(tok::r_brace)) {
     // Empty initializers are a C++ feature and a GNU extension to C.
diff --git a/lib/Parse/ParseObjc.cpp b/lib/Parse/ParseObjc.cpp
index 1fd60a2..977d4d9 100644
--- a/lib/Parse/ParseObjc.cpp
+++ b/lib/Parse/ParseObjc.cpp
@@ -1806,7 +1806,7 @@
     Diag(Tok, diag::err_expected_lbrace);
     return StmtError();
   }
-  StmtVector CatchStmts(Actions);
+  StmtVector CatchStmts;
   StmtResult FinallyStmt;
   ParseScope TryScope(this, Scope::DeclScope);
   StmtResult TryBody(ParseCompoundStatementBody());
@@ -2418,7 +2418,7 @@
 
   SmallVector<IdentifierInfo *, 12> KeyIdents;
   SmallVector<SourceLocation, 12> KeyLocs;
-  ExprVector KeyExprs(Actions);
+  ExprVector KeyExprs;
 
   if (Tok.is(tok::colon)) {
     while (1) {
@@ -2551,21 +2551,12 @@
 
   if (SuperLoc.isValid())
     return Actions.ActOnSuperMessage(getCurScope(), SuperLoc, Sel,
-                                     LBracLoc, KeyLocs, RBracLoc,
-                                     MultiExprArg(Actions, 
-                                                  KeyExprs.take(),
-                                                  KeyExprs.size()));
+                                     LBracLoc, KeyLocs, RBracLoc, KeyExprs);
   else if (ReceiverType)
     return Actions.ActOnClassMessage(getCurScope(), ReceiverType, Sel,
-                                     LBracLoc, KeyLocs, RBracLoc,
-                                     MultiExprArg(Actions, 
-                                                  KeyExprs.take(), 
-                                                  KeyExprs.size()));
+                                     LBracLoc, KeyLocs, RBracLoc, KeyExprs);
   return Actions.ActOnInstanceMessage(getCurScope(), ReceiverExpr, Sel,
-                                      LBracLoc, KeyLocs, RBracLoc,
-                                      MultiExprArg(Actions, 
-                                                   KeyExprs.take(), 
-                                                   KeyExprs.size()));
+                                      LBracLoc, KeyLocs, RBracLoc, KeyExprs);
 }
 
 ExprResult Parser::ParseObjCStringLiteral(SourceLocation AtLoc) {
@@ -2576,7 +2567,7 @@
   // expressions.  At this point, we know that the only valid thing that starts
   // with '@' is an @"".
   SmallVector<SourceLocation, 4> AtLocs;
-  ExprVector AtStrings(Actions);
+  ExprVector AtStrings;
   AtLocs.push_back(AtLoc);
   AtStrings.push_back(Res.release());
 
@@ -2594,7 +2585,7 @@
     AtStrings.push_back(Lit.release());
   }
 
-  return Owned(Actions.ParseObjCStringLiteral(&AtLocs[0], AtStrings.take(),
+  return Owned(Actions.ParseObjCStringLiteral(&AtLocs[0], AtStrings.data(),
                                               AtStrings.size()));
 }
 
@@ -2661,7 +2652,7 @@
 }
 
 ExprResult Parser::ParseObjCArrayLiteral(SourceLocation AtLoc) {
-  ExprVector ElementExprs(Actions);                   // array elements.
+  ExprVector ElementExprs;                   // array elements.
   ConsumeBracket(); // consume the l_square.
 
   while (Tok.isNot(tok::r_square)) {
@@ -2689,7 +2680,7 @@
      return ExprError(Diag(Tok, diag::err_expected_rsquare_or_comma));
   }
   SourceLocation EndLoc = ConsumeBracket(); // location of ']'
-  MultiExprArg Args(Actions, ElementExprs.take(), ElementExprs.size());
+  MultiExprArg Args(ElementExprs);
   return Owned(Actions.BuildObjCArrayLiteral(SourceRange(AtLoc, EndLoc), Args));
 }
 
diff --git a/lib/Parse/ParseStmt.cpp b/lib/Parse/ParseStmt.cpp
index 37bfb03..2dc8e65 100644
--- a/lib/Parse/ParseStmt.cpp
+++ b/lib/Parse/ParseStmt.cpp
@@ -686,7 +686,7 @@
 
   Sema::CompoundScopeRAII CompoundScope(Actions);
 
-  StmtVector Stmts(Actions);
+  StmtVector Stmts;
 
   // "__label__ X, Y, Z;" is the GNU "Local Label" extension.  These are
   // only allowed at the start of a compound stmt regardless of the language.
@@ -1318,7 +1318,7 @@
     ColonProtectionRAIIObject ColonProtection(*this, MightBeForRangeStmt);
 
     SourceLocation DeclStart = Tok.getLocation(), DeclEnd;
-    StmtVector Stmts(Actions);
+    StmtVector Stmts;
     DeclGroupPtrTy DG = ParseSimpleDeclaration(Stmts, Declarator::ForContext,
                                                DeclEnd, attrs, false,
                                                MightBeForRangeStmt ?
@@ -1749,9 +1749,9 @@
   }
 
   SmallVector<IdentifierInfo *, 4> Names;
-  ExprVector Constraints(Actions);
-  ExprVector Exprs(Actions);
-  ExprVector Clobbers(Actions);
+  ExprVector Constraints;
+  ExprVector Exprs;
+  ExprVector Clobbers;
 
   if (Tok.is(tok::r_paren)) {
     // We have a simple asm expression like 'asm("foo")'.
@@ -2043,7 +2043,7 @@
                                     Handler.take());
   }
   else {
-    StmtVector Handlers(Actions);
+    StmtVector Handlers;
     ParsedAttributesWithRange attrs(AttrFactory);
     MaybeParseCXX0XAttributes(attrs);
     ProhibitAttributes(attrs);
diff --git a/lib/Parse/Parser.cpp b/lib/Parse/Parser.cpp
index 526da75..1dff650 100644
--- a/lib/Parse/Parser.cpp
+++ b/lib/Parse/Parser.cpp
@@ -693,7 +693,7 @@
     // A function definition cannot start with any of these keywords.
     {
       SourceLocation DeclEnd;
-      StmtVector Stmts(Actions);
+      StmtVector Stmts;
       return ParseDeclaration(Stmts, Declarator::FileContext, DeclEnd, attrs);
     }
 
@@ -704,7 +704,7 @@
       Diag(ConsumeToken(), diag::warn_static_inline_explicit_inst_ignored)
         << 0;
       SourceLocation DeclEnd;
-      StmtVector Stmts(Actions);
+      StmtVector Stmts;
       return ParseDeclaration(Stmts, Declarator::FileContext, DeclEnd, attrs);  
     }
     goto dont_know;
@@ -716,7 +716,7 @@
       // Inline namespaces. Allowed as an extension even in C++03.
       if (NextKind == tok::kw_namespace) {
         SourceLocation DeclEnd;
-        StmtVector Stmts(Actions);
+        StmtVector Stmts;
         return ParseDeclaration(Stmts, Declarator::FileContext, DeclEnd, attrs);
       }
       
@@ -726,7 +726,7 @@
         Diag(ConsumeToken(), diag::warn_static_inline_explicit_inst_ignored)
           << 1;
         SourceLocation DeclEnd;
-        StmtVector Stmts(Actions);
+        StmtVector Stmts;
         return ParseDeclaration(Stmts, Declarator::FileContext, DeclEnd, attrs);  
       }
     }
diff --git a/lib/Sema/SemaDeclCXX.cpp b/lib/Sema/SemaDeclCXX.cpp
index 41e7525..e085bda 100644
--- a/lib/Sema/SemaDeclCXX.cpp
+++ b/lib/Sema/SemaDeclCXX.cpp
@@ -7669,7 +7669,7 @@
   //   which they were declared in the class definition.
   
   // The statements that form the synthesized function body.
-  ASTOwningVector<Stmt*> Statements(*this);
+  SmallVector<Stmt*, 8> Statements;
   
   // The parameter for the "other" object, which we are copying from.
   ParmVarDecl *Other = CopyAssignOperator->getParamDecl(0);
@@ -7874,7 +7874,7 @@
         assert(BuiltinMemCpyRef && "Builtin reference cannot fail");
       }
           
-      ASTOwningVector<Expr*> CallArgs(*this);
+      SmallVector<Expr*, 8> CallArgs;
       CallArgs.push_back(To.takeAs<Expr>());
       CallArgs.push_back(From.takeAs<Expr>());
       CallArgs.push_back(IntegerLiteral::Create(Context, Size, SizeType, Loc));
@@ -8210,7 +8210,7 @@
   //   definition.
 
   // The statements that form the synthesized function body.
-  ASTOwningVector<Stmt*> Statements(*this);
+  SmallVector<Stmt*, 8> Statements;
 
   // The parameter for the "other" object, which we are move from.
   ParmVarDecl *Other = MoveAssignOperator->getParamDecl(0);
@@ -8423,7 +8423,7 @@
         assert(BuiltinMemCpyRef && "Builtin reference cannot fail");
       }
           
-      ASTOwningVector<Expr*> CallArgs(*this);
+      SmallVector<Expr*, 8> CallArgs;
       CallArgs.push_back(To.takeAs<Expr>());
       CallArgs.push_back(From.takeAs<Expr>());
       CallArgs.push_back(IntegerLiteral::Create(Context, Size, SizeType, Loc));
@@ -9138,7 +9138,7 @@
 Sema::CompleteConstructorCall(CXXConstructorDecl *Constructor,
                               MultiExprArg ArgsPtr,
                               SourceLocation Loc,
-                              ASTOwningVector<Expr*> &ConvertedArgs,
+                              SmallVectorImpl<Expr*> &ConvertedArgs,
                               bool AllowExplicit) {
   // FIXME: This duplicates a lot of code from Sema::ConvertArgumentsForCall.
   unsigned NumArgs = ArgsPtr.size();
diff --git a/lib/Sema/SemaExprCXX.cpp b/lib/Sema/SemaExprCXX.cpp
index 88345ce..c5ea7bb 100644
--- a/lib/Sema/SemaExprCXX.cpp
+++ b/lib/Sema/SemaExprCXX.cpp
@@ -2349,7 +2349,7 @@
   default: llvm_unreachable("Unhandled cast kind!");
   case CK_ConstructorConversion: {
     CXXConstructorDecl *Constructor = cast<CXXConstructorDecl>(Method);
-    ASTOwningVector<Expr*> ConstructorArgs(S);
+    SmallVector<Expr*, 8> ConstructorArgs;
 
     if (S.CompleteConstructorCall(Constructor,
                                   MultiExprArg(&From, 1),
@@ -2506,7 +2506,7 @@
     // FIXME: When can ToType be a reference type?
     assert(!ToType->isReferenceType());
     if (SCS.Second == ICK_Derived_To_Base) {
-      ASTOwningVector<Expr*> ConstructorArgs(*this);
+      SmallVector<Expr*, 8> ConstructorArgs;
       if (CompleteConstructorCall(cast<CXXConstructorDecl>(SCS.CopyConstructor),
                                   MultiExprArg(*this, &From, 1),
                                   /*FIXME:ConstructLoc*/SourceLocation(),
diff --git a/lib/Sema/SemaInit.cpp b/lib/Sema/SemaInit.cpp
index 35442eb..e2cfda0 100644
--- a/lib/Sema/SemaInit.cpp
+++ b/lib/Sema/SemaInit.cpp
@@ -4478,7 +4478,7 @@
   }
 
   CXXConstructorDecl *Constructor = cast<CXXConstructorDecl>(Best->Function);
-  ASTOwningVector<Expr*> ConstructorArgs(S);
+  SmallVector<Expr*, 8> ConstructorArgs;
   CurInit.release(); // Ownership transferred into MultiExprArg, below.
 
   S.CheckConstructorAccess(Loc, Constructor, Entity,
@@ -4619,7 +4619,7 @@
   bool HadMultipleCandidates = Step.Function.HadMultipleCandidates;
 
   // Build a call to the selected constructor.
-  ASTOwningVector<Expr*> ConstructorArgs(S);
+  SmallVector<Expr*, 8> ConstructorArgs;
   SourceLocation Loc = (Kind.isCopyInit() && Kind.getEqualLoc().isValid())
                          ? Kind.getEqualLoc()
                          : Kind.getLocation();
@@ -4661,7 +4661,7 @@
          Kind.getKind() == InitializationKind::IK_Value)))) {
     // An explicitly-constructed temporary, e.g., X(1, 2).
     unsigned NumExprs = ConstructorArgs.size();
-    Expr **Exprs = (Expr **)ConstructorArgs.take();
+    Expr **Exprs = ConstructorArgs.data();
     S.MarkFunctionReferenced(Loc, Constructor);
     S.DiagnoseUseOfDecl(Constructor, Loc);
 
@@ -5031,7 +5031,7 @@
       bool CreatedObject = false;
       if (CXXConstructorDecl *Constructor = dyn_cast<CXXConstructorDecl>(Fn)) {
         // Build a call to the selected constructor.
-        ASTOwningVector<Expr*> ConstructorArgs(S);
+        SmallVector<Expr*, 8> ConstructorArgs;
         SourceLocation Loc = CurInit.get()->getLocStart();
         CurInit.release(); // Ownership transferred into MultiExprArg, below.
 
diff --git a/lib/Sema/SemaTemplateInstantiateDecl.cpp b/lib/Sema/SemaTemplateInstantiateDecl.cpp
index e734634..69b72c5 100644
--- a/lib/Sema/SemaTemplateInstantiateDecl.cpp
+++ b/lib/Sema/SemaTemplateInstantiateDecl.cpp
@@ -3031,7 +3031,7 @@
       isa<CXXTemporaryObjectExpr>(Construct))
     return SubstExpr(Init, TemplateArgs);
 
-  ASTOwningVector<Expr*> NewArgs(*this);
+  SmallVector<Expr*, 8> NewArgs;
   if (SubstExprs(Construct->getArgs(), Construct->getNumArgs(), true,
                  TemplateArgs, NewArgs))
     return ExprError();
diff --git a/lib/Sema/TreeTransform.h b/lib/Sema/TreeTransform.h
index 32c765e..5b6c112 100644
--- a/lib/Sema/TreeTransform.h
+++ b/lib/Sema/TreeTransform.h
@@ -2118,7 +2118,7 @@
                                      bool RequiresZeroInit,
                              CXXConstructExpr::ConstructionKind ConstructKind,
                                      SourceRange ParenRange) {
-    ASTOwningVector<Expr*> ConvertedArgs(SemaRef);
+    SmallVector<Expr*, 8> ConvertedArgs;
     if (getSema().CompleteConstructorCall(Constructor, Args, Loc,
                                           ConvertedArgs))
       return ExprError();
@@ -5097,7 +5097,7 @@
 
   bool SubStmtInvalid = false;
   bool SubStmtChanged = false;
-  ASTOwningVector<Stmt*> Statements(getSema());
+  SmallVector<Stmt*, 8> Statements;
   for (CompoundStmt::body_iterator B = S->body_begin(), BEnd = S->body_end();
        B != BEnd; ++B) {
     StmtResult Result = getDerived().TransformStmt(*B);
@@ -5533,12 +5533,12 @@
 StmtResult
 TreeTransform<Derived>::TransformAsmStmt(AsmStmt *S) {
 
-  ASTOwningVector<Expr*> Constraints(getSema());
-  ASTOwningVector<Expr*> Exprs(getSema());
+  SmallVector<Expr*, 8> Constraints;
+  SmallVector<Expr*, 8> Exprs;
   SmallVector<IdentifierInfo *, 4> Names;
 
   ExprResult AsmString;
-  ASTOwningVector<Expr*> Clobbers(getSema());
+  SmallVector<Expr*, 8> Clobbers;
 
   bool ExprsChanged = false;
 
@@ -5621,7 +5621,7 @@
 
   // Transform the @catch statements (if present).
   bool AnyCatchChanged = false;
-  ASTOwningVector<Stmt*> CatchStmts(SemaRef);
+  SmallVector<Stmt*, 8> CatchStmts;
   for (unsigned I = 0, N = S->getNumCatchStmts(); I != N; ++I) {
     StmtResult Catch = getDerived().TransformStmt(S->getCatchStmt(I));
     if (Catch.isInvalid())
@@ -5852,7 +5852,7 @@
 
   // Transform the handlers.
   bool HandlerChanged = false;
-  ASTOwningVector<Stmt*> Handlers(SemaRef);
+  SmallVector<Stmt*, 8> Handlers;
   for (unsigned I = 0, N = S->getNumHandlers(); I != N; ++I) {
     StmtResult Handler
       = getDerived().TransformCXXCatchStmt(S->getHandler(I));
@@ -6383,7 +6383,7 @@
 
   // Transform arguments.
   bool ArgChanged = false;
-  ASTOwningVector<Expr*> Args(SemaRef);
+  SmallVector<Expr*, 8> Args;
   if (getDerived().TransformExprs(E->getArgs(), E->getNumArgs(), true, Args,
                                   &ArgChanged))
     return ExprError();
@@ -6642,7 +6642,7 @@
 TreeTransform<Derived>::TransformInitListExpr(InitListExpr *E) {
   bool InitChanged = false;
 
-  ASTOwningVector<Expr*, 4> Inits(SemaRef);
+  SmallVector<Expr*, 4> Inits;
   if (getDerived().TransformExprs(E->getInits(), E->getNumInits(), false,
                                   Inits, &InitChanged))
     return ExprError();
@@ -6665,7 +6665,7 @@
     return ExprError();
 
   // transform the designators.
-  ASTOwningVector<Expr*, 4> ArrayExprs(SemaRef);
+  SmallVector<Expr*, 4> ArrayExprs;
   bool ExprChanged = false;
   for (DesignatedInitExpr::designators_iterator D = E->designators_begin(),
                                              DEnd = E->designators_end();
@@ -6765,7 +6765,7 @@
 ExprResult
 TreeTransform<Derived>::TransformParenListExpr(ParenListExpr *E) {
   bool ArgumentChanged = false;
-  ASTOwningVector<Expr*, 4> Inits(SemaRef);
+  SmallVector<Expr*, 4> Inits;
   if (TransformExprs(E->getExprs(), E->getNumExprs(), true, Inits,
                      &ArgumentChanged))
     return ExprError();
@@ -6872,7 +6872,7 @@
                               static_cast<Expr *>(Object.get())->getLocEnd());
 
     // Transform the call arguments.
-    ASTOwningVector<Expr*> Args(SemaRef);
+    SmallVector<Expr*, 8> Args;
     if (getDerived().TransformExprs(E->getArgs() + 1, E->getNumArgs() - 1, true,
                                     Args))
       return ExprError();
@@ -6947,7 +6947,7 @@
 
   // Transform arguments.
   bool ArgChanged = false;
-  ASTOwningVector<Expr*> Args(SemaRef);
+  SmallVector<Expr*, 8> Args;
   if (getDerived().TransformExprs(E->getArgs(), E->getNumArgs(), true, Args,
                                   &ArgChanged))
     return ExprError();
@@ -7219,7 +7219,7 @@
 
   // Transform the placement arguments (if any).
   bool ArgumentChanged = false;
-  ASTOwningVector<Expr*> PlacementArgs(SemaRef);
+  SmallVector<Expr*, 8> PlacementArgs;
   if (getDerived().TransformExprs(E->getPlacementArgs(),
                                   E->getNumPlacementArgs(), true,
                                   PlacementArgs, &ArgumentChanged))
@@ -7793,7 +7793,7 @@
     return ExprError();
 
   bool ArgumentChanged = false;
-  ASTOwningVector<Expr*> Args(SemaRef);
+  SmallVector<Expr*, 8> Args;
   if (getDerived().TransformExprs(E->getArgs(), E->getNumArgs(), true, Args,
                                   &ArgumentChanged))
     return ExprError();
@@ -7854,7 +7854,7 @@
     return ExprError();
 
   bool ArgumentChanged = false;
-  ASTOwningVector<Expr*> Args(SemaRef);
+  SmallVector<Expr*, 8> Args;
   Args.reserve(E->getNumArgs());
   if (TransformExprs(E->getArgs(), E->getNumArgs(), true, Args,
                      &ArgumentChanged))
@@ -8035,7 +8035,7 @@
     return ExprError();
 
   bool ArgumentChanged = false;
-  ASTOwningVector<Expr*> Args(SemaRef);
+  SmallVector<Expr*, 8> Args;
   Args.reserve(E->arg_size());
   if (getDerived().TransformExprs(E->arg_begin(), E->arg_size(), true, Args,
                                   &ArgumentChanged))
@@ -8573,7 +8573,7 @@
 TreeTransform<Derived>::TransformObjCMessageExpr(ObjCMessageExpr *E) {
   // Transform arguments.
   bool ArgChanged = false;
-  ASTOwningVector<Expr*> Args(SemaRef);
+  SmallVector<Expr*, 8> Args;
   Args.reserve(E->getNumArgs());
   if (getDerived().TransformExprs(E->getArgs(), E->getNumArgs(), false, Args,
                                   &ArgChanged))
@@ -8737,7 +8737,7 @@
 ExprResult
 TreeTransform<Derived>::TransformShuffleVectorExpr(ShuffleVectorExpr *E) {
   bool ArgumentChanged = false;
-  ASTOwningVector<Expr*> SubExprs(SemaRef);
+  SmallVector<Expr*, 8> SubExprs;
   SubExprs.reserve(E->getNumSubExprs());
   if (getDerived().TransformExprs(E->getSubExprs(), E->getNumSubExprs(), false,
                                   SubExprs, &ArgumentChanged))
@@ -8851,7 +8851,7 @@
 TreeTransform<Derived>::TransformAtomicExpr(AtomicExpr *E) {
   QualType RetTy = getDerived().TransformType(E->getType());
   bool ArgumentChanged = false;
-  ASTOwningVector<Expr*> SubExprs(SemaRef);
+  SmallVector<Expr*, 8> SubExprs;
   SubExprs.reserve(E->getNumSubExprs());
   if (getDerived().TransformExprs(E->getSubExprs(), E->getNumSubExprs(), false,
                                   SubExprs, &ArgumentChanged))