Import Clang, at r72732.vendor/clang/clang-r72732

1 files changed, 1136 insertions, 0 deletions

diff --git a/lib/Frontend/PCHReaderStmt.cpp b/lib/Frontend/PCHReaderStmt.cpp
new file mode 100644
index 000000000000..10059f609b10
--- /dev/null
+++ b/lib/Frontend/PCHReaderStmt.cpp
@@ -0,0 +1,1136 @@
+//===--- PCHReaderStmt.cpp - Stmt/Expr Deserialization ----------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Statement/expression deserialization.  This implements the
+// PCHReader::ReadStmt method.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Frontend/PCHReader.h"
+#include "clang/AST/StmtVisitor.h"
+using namespace clang;
+
+namespace {
+  class PCHStmtReader : public StmtVisitor<PCHStmtReader, unsigned> {
+    PCHReader &Reader;
+    const PCHReader::RecordData &Record;
+    unsigned &Idx;
+    llvm::SmallVectorImpl<Stmt *> &StmtStack;
+
+  public:
+    PCHStmtReader(PCHReader &Reader, const PCHReader::RecordData &Record,
+                  unsigned &Idx, llvm::SmallVectorImpl<Stmt *> &StmtStack)
+      : Reader(Reader), Record(Record), Idx(Idx), StmtStack(StmtStack) { }
+
+    /// \brief The number of record fields required for the Stmt class
+    /// itself.
+    static const unsigned NumStmtFields = 0;
+
+    /// \brief The number of record fields required for the Expr class
+    /// itself.
+    static const unsigned NumExprFields = NumStmtFields + 3;
+
+    // Each of the Visit* functions reads in part of the expression
+    // from the given record and the current expression stack, then
+    // return the total number of operands that it read from the
+    // expression stack.
+
+    unsigned VisitStmt(Stmt *S);
+    unsigned VisitNullStmt(NullStmt *S);
+    unsigned VisitCompoundStmt(CompoundStmt *S);
+    unsigned VisitSwitchCase(SwitchCase *S);
+    unsigned VisitCaseStmt(CaseStmt *S);
+    unsigned VisitDefaultStmt(DefaultStmt *S);
+    unsigned VisitLabelStmt(LabelStmt *S);
+    unsigned VisitIfStmt(IfStmt *S);
+    unsigned VisitSwitchStmt(SwitchStmt *S);
+    unsigned VisitWhileStmt(WhileStmt *S);
+    unsigned VisitDoStmt(DoStmt *S);
+    unsigned VisitForStmt(ForStmt *S);
+    unsigned VisitGotoStmt(GotoStmt *S);
+    unsigned VisitIndirectGotoStmt(IndirectGotoStmt *S);
+    unsigned VisitContinueStmt(ContinueStmt *S);
+    unsigned VisitBreakStmt(BreakStmt *S);
+    unsigned VisitReturnStmt(ReturnStmt *S);
+    unsigned VisitDeclStmt(DeclStmt *S);
+    unsigned VisitAsmStmt(AsmStmt *S);
+    unsigned VisitExpr(Expr *E);
+    unsigned VisitPredefinedExpr(PredefinedExpr *E);
+    unsigned VisitDeclRefExpr(DeclRefExpr *E);
+    unsigned VisitIntegerLiteral(IntegerLiteral *E);
+    unsigned VisitFloatingLiteral(FloatingLiteral *E);
+    unsigned VisitImaginaryLiteral(ImaginaryLiteral *E);
+    unsigned VisitStringLiteral(StringLiteral *E);
+    unsigned VisitCharacterLiteral(CharacterLiteral *E);
+    unsigned VisitParenExpr(ParenExpr *E);
+    unsigned VisitUnaryOperator(UnaryOperator *E);
+    unsigned VisitSizeOfAlignOfExpr(SizeOfAlignOfExpr *E);
+    unsigned VisitArraySubscriptExpr(ArraySubscriptExpr *E);
+    unsigned VisitCallExpr(CallExpr *E);
+    unsigned VisitMemberExpr(MemberExpr *E);
+    unsigned VisitCastExpr(CastExpr *E);
+    unsigned VisitBinaryOperator(BinaryOperator *E);
+    unsigned VisitCompoundAssignOperator(CompoundAssignOperator *E);
+    unsigned VisitConditionalOperator(ConditionalOperator *E);
+    unsigned VisitImplicitCastExpr(ImplicitCastExpr *E);
+    unsigned VisitExplicitCastExpr(ExplicitCastExpr *E);
+    unsigned VisitCStyleCastExpr(CStyleCastExpr *E);
+    unsigned VisitCompoundLiteralExpr(CompoundLiteralExpr *E);
+    unsigned VisitExtVectorElementExpr(ExtVectorElementExpr *E);
+    unsigned VisitInitListExpr(InitListExpr *E);
+    unsigned VisitDesignatedInitExpr(DesignatedInitExpr *E);
+    unsigned VisitImplicitValueInitExpr(ImplicitValueInitExpr *E);
+    unsigned VisitVAArgExpr(VAArgExpr *E);
+    unsigned VisitAddrLabelExpr(AddrLabelExpr *E);
+    unsigned VisitStmtExpr(StmtExpr *E);
+    unsigned VisitTypesCompatibleExpr(TypesCompatibleExpr *E);
+    unsigned VisitChooseExpr(ChooseExpr *E);
+    unsigned VisitGNUNullExpr(GNUNullExpr *E);
+    unsigned VisitShuffleVectorExpr(ShuffleVectorExpr *E);
+    unsigned VisitBlockExpr(BlockExpr *E);
+    unsigned VisitBlockDeclRefExpr(BlockDeclRefExpr *E);
+    unsigned VisitObjCStringLiteral(ObjCStringLiteral *E);
+    unsigned VisitObjCEncodeExpr(ObjCEncodeExpr *E);
+    unsigned VisitObjCSelectorExpr(ObjCSelectorExpr *E);
+    unsigned VisitObjCProtocolExpr(ObjCProtocolExpr *E);
+    unsigned VisitObjCIvarRefExpr(ObjCIvarRefExpr *E);
+    unsigned VisitObjCPropertyRefExpr(ObjCPropertyRefExpr *E);
+    unsigned VisitObjCKVCRefExpr(ObjCKVCRefExpr *E);
+    unsigned VisitObjCMessageExpr(ObjCMessageExpr *E);
+    unsigned VisitObjCSuperExpr(ObjCSuperExpr *E);
+    
+    unsigned VisitObjCForCollectionStmt(ObjCForCollectionStmt *);
+    unsigned VisitObjCAtCatchStmt(ObjCAtCatchStmt *);
+    unsigned VisitObjCAtFinallyStmt(ObjCAtFinallyStmt *);
+    unsigned VisitObjCAtTryStmt(ObjCAtTryStmt *);
+    unsigned VisitObjCAtSynchronizedStmt(ObjCAtSynchronizedStmt *);
+    unsigned VisitObjCAtThrowStmt(ObjCAtThrowStmt *);
+  };
+}
+
+unsigned PCHStmtReader::VisitStmt(Stmt *S) {
+  assert(Idx == NumStmtFields && "Incorrect statement field count");
+  return 0;
+}
+
+unsigned PCHStmtReader::VisitNullStmt(NullStmt *S) {
+  VisitStmt(S);
+  S->setSemiLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  return 0;
+}
+
+unsigned PCHStmtReader::VisitCompoundStmt(CompoundStmt *S) {
+  VisitStmt(S);
+  unsigned NumStmts = Record[Idx++];
+  S->setStmts(*Reader.getContext(), 
+              StmtStack.data() + StmtStack.size() - NumStmts, NumStmts);
+  S->setLBracLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  S->setRBracLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  return NumStmts;
+}
+
+unsigned PCHStmtReader::VisitSwitchCase(SwitchCase *S) {
+  VisitStmt(S);
+  Reader.RecordSwitchCaseID(S, Record[Idx++]);
+  return 0;
+}
+
+unsigned PCHStmtReader::VisitCaseStmt(CaseStmt *S) {
+  VisitSwitchCase(S);
+  S->setLHS(cast<Expr>(StmtStack[StmtStack.size() - 3]));
+  S->setRHS(cast_or_null<Expr>(StmtStack[StmtStack.size() - 2]));
+  S->setSubStmt(StmtStack.back());
+  S->setCaseLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  S->setEllipsisLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  S->setColonLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  return 3;
+}
+
+unsigned PCHStmtReader::VisitDefaultStmt(DefaultStmt *S) {
+  VisitSwitchCase(S);
+  S->setSubStmt(StmtStack.back());
+  S->setDefaultLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  S->setColonLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  return 1;
+}
+
+unsigned PCHStmtReader::VisitLabelStmt(LabelStmt *S) {
+  VisitStmt(S);
+  S->setID(Reader.GetIdentifierInfo(Record, Idx));
+  S->setSubStmt(StmtStack.back());
+  S->setIdentLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  Reader.RecordLabelStmt(S, Record[Idx++]);
+  return 1;
+}
+
+unsigned PCHStmtReader::VisitIfStmt(IfStmt *S) {
+  VisitStmt(S);
+  S->setCond(cast<Expr>(StmtStack[StmtStack.size() - 3]));
+  S->setThen(StmtStack[StmtStack.size() - 2]);
+  S->setElse(StmtStack[StmtStack.size() - 1]);
+  S->setIfLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  S->setElseLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  return 3;
+}
+
+unsigned PCHStmtReader::VisitSwitchStmt(SwitchStmt *S) {
+  VisitStmt(S);
+  S->setCond(cast<Expr>(StmtStack[StmtStack.size() - 2]));
+  S->setBody(StmtStack.back());
+  S->setSwitchLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  SwitchCase *PrevSC = 0;
+  for (unsigned N = Record.size(); Idx != N; ++Idx) {
+    SwitchCase *SC = Reader.getSwitchCaseWithID(Record[Idx]);
+    if (PrevSC)
+      PrevSC->setNextSwitchCase(SC);
+    else
+      S->setSwitchCaseList(SC);
+    PrevSC = SC;
+  }
+  return 2;
+}
+
+unsigned PCHStmtReader::VisitWhileStmt(WhileStmt *S) {
+  VisitStmt(S);
+  S->setCond(cast_or_null<Expr>(StmtStack[StmtStack.size() - 2]));
+  S->setBody(StmtStack.back());
+  S->setWhileLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  return 2;
+}
+
+unsigned PCHStmtReader::VisitDoStmt(DoStmt *S) {
+  VisitStmt(S);
+  S->setCond(cast_or_null<Expr>(StmtStack[StmtStack.size() - 2]));
+  S->setBody(StmtStack.back());
+  S->setDoLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  S->setWhileLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  return 2;
+}
+
+unsigned PCHStmtReader::VisitForStmt(ForStmt *S) {
+  VisitStmt(S);
+  S->setInit(StmtStack[StmtStack.size() - 4]);
+  S->setCond(cast_or_null<Expr>(StmtStack[StmtStack.size() - 3]));
+  S->setInc(cast_or_null<Expr>(StmtStack[StmtStack.size() - 2]));
+  S->setBody(StmtStack.back());
+  S->setForLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  S->setLParenLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  S->setRParenLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  return 4;
+}
+
+unsigned PCHStmtReader::VisitGotoStmt(GotoStmt *S) {
+  VisitStmt(S);
+  Reader.SetLabelOf(S, Record[Idx++]);
+  S->setGotoLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  S->setLabelLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  return 0;
+}
+
+unsigned PCHStmtReader::VisitIndirectGotoStmt(IndirectGotoStmt *S) {
+  VisitStmt(S);
+  S->setGotoLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  S->setStarLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  S->setTarget(cast_or_null<Expr>(StmtStack.back()));
+  return 1;
+}
+
+unsigned PCHStmtReader::VisitContinueStmt(ContinueStmt *S) {
+  VisitStmt(S);
+  S->setContinueLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  return 0;
+}
+
+unsigned PCHStmtReader::VisitBreakStmt(BreakStmt *S) {
+  VisitStmt(S);
+  S->setBreakLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  return 0;
+}
+
+unsigned PCHStmtReader::VisitReturnStmt(ReturnStmt *S) {
+  VisitStmt(S);
+  S->setRetValue(cast_or_null<Expr>(StmtStack.back()));
+  S->setReturnLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  return 1;
+}
+
+unsigned PCHStmtReader::VisitDeclStmt(DeclStmt *S) {
+  VisitStmt(S);
+  S->setStartLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  S->setEndLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+
+  if (Idx + 1 == Record.size()) {
+    // Single declaration
+    S->setDeclGroup(DeclGroupRef(Reader.GetDecl(Record[Idx++])));
+  } else {
+    llvm::SmallVector<Decl *, 16> Decls;
+    Decls.reserve(Record.size() - Idx);
+    for (unsigned N = Record.size(); Idx != N; ++Idx)
+      Decls.push_back(Reader.GetDecl(Record[Idx]));
+    S->setDeclGroup(DeclGroupRef(DeclGroup::Create(*Reader.getContext(),
+                                                   Decls.data(),
+                                                   Decls.size())));
+  }
+  return 0;
+}
+
+unsigned PCHStmtReader::VisitAsmStmt(AsmStmt *S) {
+  VisitStmt(S);
+  unsigned NumOutputs = Record[Idx++];
+  unsigned NumInputs = Record[Idx++];
+  unsigned NumClobbers = Record[Idx++];
+  S->setAsmLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  S->setRParenLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  S->setVolatile(Record[Idx++]);
+  S->setSimple(Record[Idx++]);
+  
+  unsigned StackIdx 
+    = StmtStack.size() - (NumOutputs*2 + NumInputs*2 + NumClobbers + 1);
+  S->setAsmString(cast_or_null<StringLiteral>(StmtStack[StackIdx++]));
+
+  // Outputs and inputs
+  llvm::SmallVector<std::string, 16> Names;
+  llvm::SmallVector<StringLiteral*, 16> Constraints;
+  llvm::SmallVector<Stmt*, 16> Exprs;
+  for (unsigned I = 0, N = NumOutputs + NumInputs; I != N; ++I) {
+    Names.push_back(Reader.ReadString(Record, Idx));
+    Constraints.push_back(cast_or_null<StringLiteral>(StmtStack[StackIdx++]));
+    Exprs.push_back(StmtStack[StackIdx++]);
+  }
+  S->setOutputsAndInputs(NumOutputs, NumInputs,
+                         Names.data(), Constraints.data(), Exprs.data());
+
+  // Constraints
+  llvm::SmallVector<StringLiteral*, 16> Clobbers;
+  for (unsigned I = 0; I != NumClobbers; ++I)
+    Clobbers.push_back(cast_or_null<StringLiteral>(StmtStack[StackIdx++]));
+  S->setClobbers(Clobbers.data(), NumClobbers);
+
+  assert(StackIdx == StmtStack.size() && "Error deserializing AsmStmt");
+  return NumOutputs*2 + NumInputs*2 + NumClobbers + 1;
+}
+
+unsigned PCHStmtReader::VisitExpr(Expr *E) {
+  VisitStmt(E);
+  E->setType(Reader.GetType(Record[Idx++]));
+  E->setTypeDependent(Record[Idx++]);
+  E->setValueDependent(Record[Idx++]);
+  assert(Idx == NumExprFields && "Incorrect expression field count");
+  return 0;
+}
+
+unsigned PCHStmtReader::VisitPredefinedExpr(PredefinedExpr *E) {
+  VisitExpr(E);
+  E->setLocation(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  E->setIdentType((PredefinedExpr::IdentType)Record[Idx++]);
+  return 0;
+}
+
+unsigned PCHStmtReader::VisitDeclRefExpr(DeclRefExpr *E) {
+  VisitExpr(E);
+  E->setDecl(cast<NamedDecl>(Reader.GetDecl(Record[Idx++])));
+  E->setLocation(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  return 0;
+}
+
+unsigned PCHStmtReader::VisitIntegerLiteral(IntegerLiteral *E) {
+  VisitExpr(E);
+  E->setLocation(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  E->setValue(Reader.ReadAPInt(Record, Idx));
+  return 0;
+}
+
+unsigned PCHStmtReader::VisitFloatingLiteral(FloatingLiteral *E) {
+  VisitExpr(E);
+  E->setValue(Reader.ReadAPFloat(Record, Idx));
+  E->setExact(Record[Idx++]);
+  E->setLocation(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  return 0;
+}
+
+unsigned PCHStmtReader::VisitImaginaryLiteral(ImaginaryLiteral *E) {
+  VisitExpr(E);
+  E->setSubExpr(cast<Expr>(StmtStack.back()));
+  return 1;
+}
+
+unsigned PCHStmtReader::VisitStringLiteral(StringLiteral *E) {
+  VisitExpr(E);
+  unsigned Len = Record[Idx++];
+  assert(Record[Idx] == E->getNumConcatenated() && 
+         "Wrong number of concatenated tokens!");
+  ++Idx;
+  E->setWide(Record[Idx++]);
+
+  // Read string data  
+  llvm::SmallVector<char, 16> Str(&Record[Idx], &Record[Idx] + Len);
+  E->setStrData(*Reader.getContext(), Str.data(), Len);
+  Idx += Len;
+
+  // Read source locations
+  for (unsigned I = 0, N = E->getNumConcatenated(); I != N; ++I)
+    E->setStrTokenLoc(I, SourceLocation::getFromRawEncoding(Record[Idx++]));
+
+  return 0;
+}
+
+unsigned PCHStmtReader::VisitCharacterLiteral(CharacterLiteral *E) {
+  VisitExpr(E);
+  E->setValue(Record[Idx++]);
+  E->setLocation(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  E->setWide(Record[Idx++]);
+  return 0;
+}
+
+unsigned PCHStmtReader::VisitParenExpr(ParenExpr *E) {
+  VisitExpr(E);
+  E->setLParen(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  E->setRParen(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  E->setSubExpr(cast<Expr>(StmtStack.back()));
+  return 1;
+}
+
+unsigned PCHStmtReader::VisitUnaryOperator(UnaryOperator *E) {
+  VisitExpr(E);
+  E->setSubExpr(cast<Expr>(StmtStack.back()));
+  E->setOpcode((UnaryOperator::Opcode)Record[Idx++]);
+  E->setOperatorLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  return 1;
+}
+
+unsigned PCHStmtReader::VisitSizeOfAlignOfExpr(SizeOfAlignOfExpr *E) {
+  VisitExpr(E);
+  E->setSizeof(Record[Idx++]);
+  if (Record[Idx] == 0) {
+    E->setArgument(cast<Expr>(StmtStack.back()));
+    ++Idx;
+  } else {
+    E->setArgument(Reader.GetType(Record[Idx++]));
+  }
+  E->setOperatorLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  E->setRParenLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  return E->isArgumentType()? 0 : 1;
+}
+
+unsigned PCHStmtReader::VisitArraySubscriptExpr(ArraySubscriptExpr *E) {
+  VisitExpr(E);
+  E->setLHS(cast<Expr>(StmtStack[StmtStack.size() - 2]));
+  E->setRHS(cast<Expr>(StmtStack[StmtStack.size() - 1]));
+  E->setRBracketLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  return 2;
+}
+
+unsigned PCHStmtReader::VisitCallExpr(CallExpr *E) {
+  VisitExpr(E);
+  E->setNumArgs(*Reader.getContext(), Record[Idx++]);
+  E->setRParenLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  E->setCallee(cast<Expr>(StmtStack[StmtStack.size() - E->getNumArgs() - 1]));
+  for (unsigned I = 0, N = E->getNumArgs(); I != N; ++I)
+    E->setArg(I, cast<Expr>(StmtStack[StmtStack.size() - N + I]));
+  return E->getNumArgs() + 1;
+}
+
+unsigned PCHStmtReader::VisitMemberExpr(MemberExpr *E) {
+  VisitExpr(E);
+  E->setBase(cast<Expr>(StmtStack.back()));
+  E->setMemberDecl(cast<NamedDecl>(Reader.GetDecl(Record[Idx++])));
+  E->setMemberLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  E->setArrow(Record[Idx++]);
+  return 1;
+}
+
+unsigned PCHStmtReader::VisitCastExpr(CastExpr *E) {
+  VisitExpr(E);
+  E->setSubExpr(cast<Expr>(StmtStack.back()));
+  return 1;
+}
+
+unsigned PCHStmtReader::VisitBinaryOperator(BinaryOperator *E) {
+  VisitExpr(E);
+  E->setLHS(cast<Expr>(StmtStack.end()[-2]));
+  E->setRHS(cast<Expr>(StmtStack.end()[-1]));
+  E->setOpcode((BinaryOperator::Opcode)Record[Idx++]);
+  E->setOperatorLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  return 2;
+}
+
+unsigned PCHStmtReader::VisitCompoundAssignOperator(CompoundAssignOperator *E) {
+  VisitBinaryOperator(E);
+  E->setComputationLHSType(Reader.GetType(Record[Idx++]));
+  E->setComputationResultType(Reader.GetType(Record[Idx++]));
+  return 2;
+}
+
+unsigned PCHStmtReader::VisitConditionalOperator(ConditionalOperator *E) {
+  VisitExpr(E);
+  E->setCond(cast<Expr>(StmtStack[StmtStack.size() - 3]));
+  E->setLHS(cast_or_null<Expr>(StmtStack[StmtStack.size() - 2]));
+  E->setRHS(cast_or_null<Expr>(StmtStack[StmtStack.size() - 1]));
+  return 3;
+}
+
+unsigned PCHStmtReader::VisitImplicitCastExpr(ImplicitCastExpr *E) {
+  VisitCastExpr(E);
+  E->setLvalueCast(Record[Idx++]);
+  return 1;
+}
+
+unsigned PCHStmtReader::VisitExplicitCastExpr(ExplicitCastExpr *E) {
+  VisitCastExpr(E);
+  E->setTypeAsWritten(Reader.GetType(Record[Idx++]));
+  return 1;
+}
+
+unsigned PCHStmtReader::VisitCStyleCastExpr(CStyleCastExpr *E) {
+  VisitExplicitCastExpr(E);
+  E->setLParenLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  E->setRParenLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  return 1;
+}
+
+unsigned PCHStmtReader::VisitCompoundLiteralExpr(CompoundLiteralExpr *E) {
+  VisitExpr(E);
+  E->setLParenLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  E->setInitializer(cast<Expr>(StmtStack.back()));
+  E->setFileScope(Record[Idx++]);
+  return 1;
+}
+
+unsigned PCHStmtReader::VisitExtVectorElementExpr(ExtVectorElementExpr *E) {
+  VisitExpr(E);
+  E->setBase(cast<Expr>(StmtStack.back()));
+  E->setAccessor(Reader.GetIdentifierInfo(Record, Idx));
+  E->setAccessorLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  return 1;
+}
+
+unsigned PCHStmtReader::VisitInitListExpr(InitListExpr *E) {
+  VisitExpr(E);
+  unsigned NumInits = Record[Idx++];
+  E->reserveInits(NumInits);
+  for (unsigned I = 0; I != NumInits; ++I)
+    E->updateInit(I, 
+                  cast<Expr>(StmtStack[StmtStack.size() - NumInits - 1 + I]));
+  E->setSyntacticForm(cast_or_null<InitListExpr>(StmtStack.back()));
+  E->setLBraceLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  E->setRBraceLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  E->setInitializedFieldInUnion(
+                      cast_or_null<FieldDecl>(Reader.GetDecl(Record[Idx++])));
+  E->sawArrayRangeDesignator(Record[Idx++]);
+  return NumInits + 1;
+}
+
+unsigned PCHStmtReader::VisitDesignatedInitExpr(DesignatedInitExpr *E) {
+  typedef DesignatedInitExpr::Designator Designator;
+
+  VisitExpr(E);
+  unsigned NumSubExprs = Record[Idx++];
+  assert(NumSubExprs == E->getNumSubExprs() && "Wrong number of subexprs");
+  for (unsigned I = 0; I != NumSubExprs; ++I)
+    E->setSubExpr(I, cast<Expr>(StmtStack[StmtStack.size() - NumSubExprs + I]));
+  E->setEqualOrColonLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  E->setGNUSyntax(Record[Idx++]);
+
+  llvm::SmallVector<Designator, 4> Designators;
+  while (Idx < Record.size()) {
+    switch ((pch::DesignatorTypes)Record[Idx++]) {
+    case pch::DESIG_FIELD_DECL: {
+      FieldDecl *Field = cast<FieldDecl>(Reader.GetDecl(Record[Idx++]));
+      SourceLocation DotLoc 
+        = SourceLocation::getFromRawEncoding(Record[Idx++]);
+      SourceLocation FieldLoc 
+        = SourceLocation::getFromRawEncoding(Record[Idx++]);
+      Designators.push_back(Designator(Field->getIdentifier(), DotLoc, 
+                                       FieldLoc));
+      Designators.back().setField(Field);
+      break;
+    }
+
+    case pch::DESIG_FIELD_NAME: {
+      const IdentifierInfo *Name = Reader.GetIdentifierInfo(Record, Idx);
+      SourceLocation DotLoc 
+        = SourceLocation::getFromRawEncoding(Record[Idx++]);
+      SourceLocation FieldLoc 
+        = SourceLocation::getFromRawEncoding(Record[Idx++]);
+      Designators.push_back(Designator(Name, DotLoc, FieldLoc));
+      break;
+    }
+      
+    case pch::DESIG_ARRAY: {
+      unsigned Index = Record[Idx++];
+      SourceLocation LBracketLoc
+        = SourceLocation::getFromRawEncoding(Record[Idx++]);
+      SourceLocation RBracketLoc
+        = SourceLocation::getFromRawEncoding(Record[Idx++]);
+      Designators.push_back(Designator(Index, LBracketLoc, RBracketLoc));
+      break;
+    }
+
+    case pch::DESIG_ARRAY_RANGE: {
+      unsigned Index = Record[Idx++];
+      SourceLocation LBracketLoc
+        = SourceLocation::getFromRawEncoding(Record[Idx++]);
+      SourceLocation EllipsisLoc
+        = SourceLocation::getFromRawEncoding(Record[Idx++]);
+      SourceLocation RBracketLoc
+        = SourceLocation::getFromRawEncoding(Record[Idx++]);
+      Designators.push_back(Designator(Index, LBracketLoc, EllipsisLoc,
+                                       RBracketLoc));
+      break;
+    }
+    }
+  }
+  E->setDesignators(Designators.data(), Designators.size());
+
+  return NumSubExprs;
+}
+
+unsigned PCHStmtReader::VisitImplicitValueInitExpr(ImplicitValueInitExpr *E) {
+  VisitExpr(E);
+  return 0;
+}
+
+unsigned PCHStmtReader::VisitVAArgExpr(VAArgExpr *E) {
+  VisitExpr(E);
+  E->setSubExpr(cast<Expr>(StmtStack.back()));
+  E->setBuiltinLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  E->setRParenLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  return 1;
+}
+
+unsigned PCHStmtReader::VisitAddrLabelExpr(AddrLabelExpr *E) {
+  VisitExpr(E);
+  E->setAmpAmpLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  E->setLabelLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  Reader.SetLabelOf(E, Record[Idx++]);
+  return 0;
+}
+
+unsigned PCHStmtReader::VisitStmtExpr(StmtExpr *E) {
+  VisitExpr(E);
+  E->setLParenLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  E->setRParenLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  E->setSubStmt(cast_or_null<CompoundStmt>(StmtStack.back()));
+  return 1;
+}
+
+unsigned PCHStmtReader::VisitTypesCompatibleExpr(TypesCompatibleExpr *E) {
+  VisitExpr(E);
+  E->setArgType1(Reader.GetType(Record[Idx++]));
+  E->setArgType2(Reader.GetType(Record[Idx++]));
+  E->setBuiltinLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  E->setRParenLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  return 0;
+}
+
+unsigned PCHStmtReader::VisitChooseExpr(ChooseExpr *E) {
+  VisitExpr(E);
+  E->setCond(cast<Expr>(StmtStack[StmtStack.size() - 3]));
+  E->setLHS(cast_or_null<Expr>(StmtStack[StmtStack.size() - 2]));
+  E->setRHS(cast_or_null<Expr>(StmtStack[StmtStack.size() - 1]));
+  E->setBuiltinLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  E->setRParenLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  return 3;
+}
+
+unsigned PCHStmtReader::VisitGNUNullExpr(GNUNullExpr *E) {
+  VisitExpr(E);
+  E->setTokenLocation(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  return 0;
+}
+
+unsigned PCHStmtReader::VisitShuffleVectorExpr(ShuffleVectorExpr *E) {
+  VisitExpr(E);
+  unsigned NumExprs = Record[Idx++];
+  E->setExprs((Expr **)&StmtStack[StmtStack.size() - NumExprs], NumExprs);
+  E->setBuiltinLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  E->setRParenLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  return NumExprs;
+}
+
+unsigned PCHStmtReader::VisitBlockExpr(BlockExpr *E) {
+  VisitExpr(E);
+  E->setBlockDecl(cast_or_null<BlockDecl>(Reader.GetDecl(Record[Idx++])));
+  E->setHasBlockDeclRefExprs(Record[Idx++]);
+  return 0;
+}
+
+unsigned PCHStmtReader::VisitBlockDeclRefExpr(BlockDeclRefExpr *E) {
+  VisitExpr(E);
+  E->setDecl(cast<ValueDecl>(Reader.GetDecl(Record[Idx++])));
+  E->setLocation(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  E->setByRef(Record[Idx++]);
+  return 0;
+}
+
+//===----------------------------------------------------------------------===//
+// Objective-C Expressions and Statements
+
+unsigned PCHStmtReader::VisitObjCStringLiteral(ObjCStringLiteral *E) {
+  VisitExpr(E);
+  E->setString(cast<StringLiteral>(StmtStack.back()));
+  E->setAtLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  return 1;
+}
+
+unsigned PCHStmtReader::VisitObjCEncodeExpr(ObjCEncodeExpr *E) {
+  VisitExpr(E);
+  E->setEncodedType(Reader.GetType(Record[Idx++]));
+  E->setAtLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  E->setRParenLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  return 0;
+}
+
+unsigned PCHStmtReader::VisitObjCSelectorExpr(ObjCSelectorExpr *E) {
+  VisitExpr(E);
+  E->setSelector(Reader.GetSelector(Record, Idx));
+  E->setAtLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  E->setRParenLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  return 0;
+}
+
+unsigned PCHStmtReader::VisitObjCProtocolExpr(ObjCProtocolExpr *E) {
+  VisitExpr(E);
+  E->setProtocol(cast<ObjCProtocolDecl>(Reader.GetDecl(Record[Idx++])));
+  E->setAtLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  E->setRParenLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  return 0;
+}
+
+unsigned PCHStmtReader::VisitObjCIvarRefExpr(ObjCIvarRefExpr *E) {
+  VisitExpr(E);
+  E->setDecl(cast<ObjCIvarDecl>(Reader.GetDecl(Record[Idx++])));
+  E->setLocation(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  E->setBase(cast<Expr>(StmtStack.back()));
+  E->setIsArrow(Record[Idx++]);
+  E->setIsFreeIvar(Record[Idx++]);
+  return 1;
+}
+
+unsigned PCHStmtReader::VisitObjCPropertyRefExpr(ObjCPropertyRefExpr *E) {
+  VisitExpr(E);
+  E->setProperty(cast<ObjCPropertyDecl>(Reader.GetDecl(Record[Idx++])));
+  E->setLocation(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  E->setBase(cast<Expr>(StmtStack.back()));
+  return 1;
+}
+
+unsigned PCHStmtReader::VisitObjCKVCRefExpr(ObjCKVCRefExpr *E) {
+  VisitExpr(E);
+  E->setGetterMethod(
+                 cast_or_null<ObjCMethodDecl>(Reader.GetDecl(Record[Idx++])));
+  E->setSetterMethod(
+                 cast_or_null<ObjCMethodDecl>(Reader.GetDecl(Record[Idx++])));
+  E->setClassProp(
+              cast_or_null<ObjCInterfaceDecl>(Reader.GetDecl(Record[Idx++])));
+  E->setBase(cast_or_null<Expr>(StmtStack.back()));
+  E->setLocation(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  E->setClassLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  return 1;
+}
+
+unsigned PCHStmtReader::VisitObjCMessageExpr(ObjCMessageExpr *E) {
+  VisitExpr(E);
+  E->setNumArgs(Record[Idx++]);
+  E->setLeftLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  E->setRightLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  E->setSelector(Reader.GetSelector(Record, Idx));
+  E->setMethodDecl(cast_or_null<ObjCMethodDecl>(Reader.GetDecl(Record[Idx++])));
+  
+  E->setReceiver(
+         cast_or_null<Expr>(StmtStack[StmtStack.size() - E->getNumArgs() - 1]));
+  if (!E->getReceiver()) {
+    ObjCMessageExpr::ClassInfo CI;
+    CI.first = cast_or_null<ObjCInterfaceDecl>(Reader.GetDecl(Record[Idx++]));
+    CI.second = Reader.GetIdentifierInfo(Record, Idx);
+    E->setClassInfo(CI);
+  }
+
+  for (unsigned I = 0, N = E->getNumArgs(); I != N; ++I)
+    E->setArg(I, cast<Expr>(StmtStack[StmtStack.size() - N + I]));
+  return E->getNumArgs() + 1;
+}
+
+unsigned PCHStmtReader::VisitObjCSuperExpr(ObjCSuperExpr *E) {
+  VisitExpr(E);
+  E->setLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  return 0;
+}
+
+unsigned PCHStmtReader::VisitObjCForCollectionStmt(ObjCForCollectionStmt *S) {
+  VisitStmt(S);
+  S->setElement(cast_or_null<Stmt>(StmtStack[StmtStack.size() - 3]));
+  S->setCollection(cast_or_null<Expr>(StmtStack[StmtStack.size() - 2]));
+  S->setBody(cast_or_null<Stmt>(StmtStack[StmtStack.size() - 1]));
+  S->setForLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  S->setRParenLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  return 3;
+}
+
+unsigned PCHStmtReader::VisitObjCAtCatchStmt(ObjCAtCatchStmt *S) {
+  VisitStmt(S);
+  S->setCatchBody(cast_or_null<Stmt>(StmtStack[StmtStack.size() - 2]));
+  S->setNextCatchStmt(cast_or_null<Stmt>(StmtStack[StmtStack.size() - 1]));
+  S->setCatchParamDecl(cast_or_null<ParmVarDecl>(Reader.GetDecl(Record[Idx++])));
+  S->setAtCatchLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  S->setRParenLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  return 2;
+}
+
+unsigned PCHStmtReader::VisitObjCAtFinallyStmt(ObjCAtFinallyStmt *S) {
+  VisitStmt(S);
+  S->setFinallyBody(StmtStack.back());
+  S->setAtFinallyLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  return 1;
+}
+
+unsigned PCHStmtReader::VisitObjCAtTryStmt(ObjCAtTryStmt *S) {
+  VisitStmt(S);
+  S->setTryBody(cast_or_null<Stmt>(StmtStack[StmtStack.size() - 3]));
+  S->setCatchStmts(cast_or_null<Stmt>(StmtStack[StmtStack.size() - 2]));
+  S->setFinallyStmt(cast_or_null<Stmt>(StmtStack[StmtStack.size() - 1]));
+  S->setAtTryLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  return 3;
+}
+
+unsigned PCHStmtReader::VisitObjCAtSynchronizedStmt(ObjCAtSynchronizedStmt *S) {
+  VisitStmt(S);
+  S->setSynchExpr(cast_or_null<Stmt>(StmtStack[StmtStack.size() - 2]));
+  S->setSynchBody(cast_or_null<Stmt>(StmtStack[StmtStack.size() - 1]));
+  S->setAtSynchronizedLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  return 2;
+}
+
+unsigned PCHStmtReader::VisitObjCAtThrowStmt(ObjCAtThrowStmt *S) {
+  VisitStmt(S);
+  S->setThrowExpr(StmtStack.back());
+  S->setThrowLoc(SourceLocation::getFromRawEncoding(Record[Idx++]));
+  return 1;
+}
+
+
+// Within the bitstream, expressions are stored in Reverse Polish
+// Notation, with each of the subexpressions preceding the
+// expression they are stored in. To evaluate expressions, we
+// continue reading expressions and placing them on the stack, with
+// expressions having operands removing those operands from the
+// stack. Evaluation terminates when we see a STMT_STOP record, and
+// the single remaining expression on the stack is our result.
+Stmt *PCHReader::ReadStmt(llvm::BitstreamCursor &Cursor) {
+  RecordData Record;
+  unsigned Idx;
+  llvm::SmallVector<Stmt *, 16> StmtStack;
+  PCHStmtReader Reader(*this, Record, Idx, StmtStack);
+  Stmt::EmptyShell Empty;
+
+  while (true) {
+    unsigned Code = Cursor.ReadCode();
+    if (Code == llvm::bitc::END_BLOCK) {
+      if (Cursor.ReadBlockEnd()) {
+        Error("error at end of block in PCH file");
+        return 0;
+      }
+      break;
+    }
+
+    if (Code == llvm::bitc::ENTER_SUBBLOCK) {
+      // No known subblocks, always skip them.
+      Cursor.ReadSubBlockID();
+      if (Cursor.SkipBlock()) {
+        Error("malformed block record in PCH file");
+        return 0;
+      }
+      continue;
+    }
+
+    if (Code == llvm::bitc::DEFINE_ABBREV) {
+      Cursor.ReadAbbrevRecord();
+      continue;
+    }
+
+    Stmt *S = 0;
+    Idx = 0;
+    Record.clear();
+    bool Finished = false;
+    switch ((pch::StmtCode)Cursor.ReadRecord(Code, Record)) {
+    case pch::STMT_STOP:
+      Finished = true;
+      break;
+
+    case pch::STMT_NULL_PTR: 
+      S = 0; 
+      break;
+
+    case pch::STMT_NULL:
+      S = new (Context) NullStmt(Empty);
+      break;
+
+    case pch::STMT_COMPOUND:
+      S = new (Context) CompoundStmt(Empty);
+      break;
+
+    case pch::STMT_CASE:
+      S = new (Context) CaseStmt(Empty);
+      break;
+
+    case pch::STMT_DEFAULT:
+      S = new (Context) DefaultStmt(Empty);
+      break;
+
+    case pch::STMT_LABEL:
+      S = new (Context) LabelStmt(Empty);
+      break;
+
+    case pch::STMT_IF:
+      S = new (Context) IfStmt(Empty);
+      break;
+
+    case pch::STMT_SWITCH:
+      S = new (Context) SwitchStmt(Empty);
+      break;
+
+    case pch::STMT_WHILE:
+      S = new (Context) WhileStmt(Empty);
+      break;
+
+    case pch::STMT_DO:
+      S = new (Context) DoStmt(Empty);
+      break;
+      
+    case pch::STMT_FOR:
+      S = new (Context) ForStmt(Empty);
+      break;
+
+    case pch::STMT_GOTO:
+      S = new (Context) GotoStmt(Empty);
+      break;
+      
+    case pch::STMT_INDIRECT_GOTO:
+      S = new (Context) IndirectGotoStmt(Empty);
+      break;
+
+    case pch::STMT_CONTINUE:
+      S = new (Context) ContinueStmt(Empty);
+      break;
+
+    case pch::STMT_BREAK:
+      S = new (Context) BreakStmt(Empty);
+      break;
+
+    case pch::STMT_RETURN:
+      S = new (Context) ReturnStmt(Empty);
+      break;
+
+    case pch::STMT_DECL:
+      S = new (Context) DeclStmt(Empty);
+      break;
+
+    case pch::STMT_ASM:
+      S = new (Context) AsmStmt(Empty);
+      break;
+
+    case pch::EXPR_PREDEFINED:
+      S = new (Context) PredefinedExpr(Empty);
+      break;
+      
+    case pch::EXPR_DECL_REF: 
+      S = new (Context) DeclRefExpr(Empty); 
+      break;
+      
+    case pch::EXPR_INTEGER_LITERAL: 
+      S = new (Context) IntegerLiteral(Empty);
+      break;
+      
+    case pch::EXPR_FLOATING_LITERAL:
+      S = new (Context) FloatingLiteral(Empty);
+      break;
+      
+    case pch::EXPR_IMAGINARY_LITERAL:
+      S = new (Context) ImaginaryLiteral(Empty);
+      break;
+
+    case pch::EXPR_STRING_LITERAL:
+      S = StringLiteral::CreateEmpty(*Context, 
+                                     Record[PCHStmtReader::NumExprFields + 1]);
+      break;
+
+    case pch::EXPR_CHARACTER_LITERAL:
+      S = new (Context) CharacterLiteral(Empty);
+      break;
+
+    case pch::EXPR_PAREN:
+      S = new (Context) ParenExpr(Empty);
+      break;
+
+    case pch::EXPR_UNARY_OPERATOR:
+      S = new (Context) UnaryOperator(Empty);
+      break;
+
+    case pch::EXPR_SIZEOF_ALIGN_OF:
+      S = new (Context) SizeOfAlignOfExpr(Empty);
+      break;
+
+    case pch::EXPR_ARRAY_SUBSCRIPT:
+      S = new (Context) ArraySubscriptExpr(Empty);
+      break;
+
+    case pch::EXPR_CALL:
+      S = new (Context) CallExpr(*Context, Empty);
+      break;
+
+    case pch::EXPR_MEMBER:
+      S = new (Context) MemberExpr(Empty);
+      break;
+
+    case pch::EXPR_BINARY_OPERATOR:
+      S = new (Context) BinaryOperator(Empty);
+      break;
+
+    case pch::EXPR_COMPOUND_ASSIGN_OPERATOR:
+      S = new (Context) CompoundAssignOperator(Empty);
+      break;
+
+    case pch::EXPR_CONDITIONAL_OPERATOR:
+      S = new (Context) ConditionalOperator(Empty);
+      break;
+
+    case pch::EXPR_IMPLICIT_CAST:
+      S = new (Context) ImplicitCastExpr(Empty);
+      break;
+
+    case pch::EXPR_CSTYLE_CAST:
+      S = new (Context) CStyleCastExpr(Empty);
+      break;
+
+    case pch::EXPR_COMPOUND_LITERAL:
+      S = new (Context) CompoundLiteralExpr(Empty);
+      break;
+
+    case pch::EXPR_EXT_VECTOR_ELEMENT:
+      S = new (Context) ExtVectorElementExpr(Empty);
+      break;
+
+    case pch::EXPR_INIT_LIST:
+      S = new (Context) InitListExpr(Empty);
+      break;
+
+    case pch::EXPR_DESIGNATED_INIT:
+      S = DesignatedInitExpr::CreateEmpty(*Context,
+                                     Record[PCHStmtReader::NumExprFields] - 1);
+     
+      break;
+
+    case pch::EXPR_IMPLICIT_VALUE_INIT:
+      S = new (Context) ImplicitValueInitExpr(Empty);
+      break;
+
+    case pch::EXPR_VA_ARG:
+      S = new (Context) VAArgExpr(Empty);
+      break;
+
+    case pch::EXPR_ADDR_LABEL:
+      S = new (Context) AddrLabelExpr(Empty);
+      break;
+
+    case pch::EXPR_STMT:
+      S = new (Context) StmtExpr(Empty);
+      break;
+
+    case pch::EXPR_TYPES_COMPATIBLE:
+      S = new (Context) TypesCompatibleExpr(Empty);
+      break;
+
+    case pch::EXPR_CHOOSE:
+      S = new (Context) ChooseExpr(Empty);
+      break;
+
+    case pch::EXPR_GNU_NULL:
+      S = new (Context) GNUNullExpr(Empty);
+      break;
+
+    case pch::EXPR_SHUFFLE_VECTOR:
+      S = new (Context) ShuffleVectorExpr(Empty);
+      break;
+      
+    case pch::EXPR_BLOCK:
+      S = new (Context) BlockExpr(Empty);
+      break;
+
+    case pch::EXPR_BLOCK_DECL_REF:
+      S = new (Context) BlockDeclRefExpr(Empty);
+      break;
+        
+    case pch::EXPR_OBJC_STRING_LITERAL:
+      S = new (Context) ObjCStringLiteral(Empty);
+      break;
+    case pch::EXPR_OBJC_ENCODE:
+      S = new (Context) ObjCEncodeExpr(Empty);
+      break;
+    case pch::EXPR_OBJC_SELECTOR_EXPR:
+      S = new (Context) ObjCSelectorExpr(Empty);
+      break;
+    case pch::EXPR_OBJC_PROTOCOL_EXPR:
+      S = new (Context) ObjCProtocolExpr(Empty);
+      break;
+    case pch::EXPR_OBJC_IVAR_REF_EXPR:
+      S = new (Context) ObjCIvarRefExpr(Empty);
+      break;
+    case pch::EXPR_OBJC_PROPERTY_REF_EXPR:
+      S = new (Context) ObjCPropertyRefExpr(Empty);
+      break;
+    case pch::EXPR_OBJC_KVC_REF_EXPR:
+      S = new (Context) ObjCKVCRefExpr(Empty);
+      break;
+    case pch::EXPR_OBJC_MESSAGE_EXPR:
+      S = new (Context) ObjCMessageExpr(Empty);
+      break;
+    case pch::EXPR_OBJC_SUPER_EXPR:
+      S = new (Context) ObjCSuperExpr(Empty);
+      break;
+    case pch::STMT_OBJC_FOR_COLLECTION:
+      S = new (Context) ObjCForCollectionStmt(Empty);
+      break;
+    case pch::STMT_OBJC_CATCH:
+      S = new (Context) ObjCAtCatchStmt(Empty);
+      break;
+    case pch::STMT_OBJC_FINALLY:
+      S = new (Context) ObjCAtFinallyStmt(Empty);
+      break;
+    case pch::STMT_OBJC_AT_TRY:
+      S = new (Context) ObjCAtTryStmt(Empty);
+      break;
+    case pch::STMT_OBJC_AT_SYNCHRONIZED:
+      S = new (Context) ObjCAtSynchronizedStmt(Empty);
+      break;
+    case pch::STMT_OBJC_AT_THROW:
+      S = new (Context) ObjCAtThrowStmt(Empty);
+      break;
+    }
+
+    // We hit a STMT_STOP, so we're done with this expression.
+    if (Finished)
+      break;
+
+    ++NumStatementsRead;
+
+    if (S) {
+      unsigned NumSubStmts = Reader.Visit(S);
+      while (NumSubStmts > 0) {
+        StmtStack.pop_back();
+        --NumSubStmts;
+      }
+    }
+
+    assert(Idx == Record.size() && "Invalid deserialization of statement");
+    StmtStack.push_back(S);
+  }
+  assert(StmtStack.size() == 1 && "Extra expressions on stack!");
+  SwitchCaseStmts.clear();
+  return StmtStack.back();
+}