Remove LLVM 8.0.1 files.

1 files changed, 0 insertions, 4283 deletions

diff --git a/gnu/llvm/tools/clang/lib/AST/Expr.cpp b/gnu/llvm/tools/clang/lib/AST/Expr.cpp
deleted file mode 100644
index 7cdd3b2c2a3..00000000000
--- a/gnu/llvm/tools/clang/lib/AST/Expr.cpp
+++ /dev/null
@@ -1,4283 +0,0 @@
-//===--- Expr.cpp - Expression AST Node Implementation --------------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file implements the Expr class and subclasses.
-//
-//===----------------------------------------------------------------------===//
-
-#include "clang/AST/ASTContext.h"
-#include "clang/AST/Attr.h"
-#include "clang/AST/DeclCXX.h"
-#include "clang/AST/DeclObjC.h"
-#include "clang/AST/DeclTemplate.h"
-#include "clang/AST/EvaluatedExprVisitor.h"
-#include "clang/AST/Expr.h"
-#include "clang/AST/ExprCXX.h"
-#include "clang/AST/Mangle.h"
-#include "clang/AST/RecordLayout.h"
-#include "clang/AST/StmtVisitor.h"
-#include "clang/Basic/Builtins.h"
-#include "clang/Basic/CharInfo.h"
-#include "clang/Basic/SourceManager.h"
-#include "clang/Basic/TargetInfo.h"
-#include "clang/Lex/Lexer.h"
-#include "clang/Lex/LiteralSupport.h"
-#include "llvm/Support/ErrorHandling.h"
-#include "llvm/Support/raw_ostream.h"
-#include <algorithm>
-#include <cstring>
-using namespace clang;
-
-const Expr *Expr::getBestDynamicClassTypeExpr() const {
-  const Expr *E = this;
-  while (true) {
-    E = E->ignoreParenBaseCasts();
-
-    // Follow the RHS of a comma operator.
-    if (auto *BO = dyn_cast<BinaryOperator>(E)) {
-      if (BO->getOpcode() == BO_Comma) {
-        E = BO->getRHS();
-        continue;
-      }
-    }
-
-    // Step into initializer for materialized temporaries.
-    if (auto *MTE = dyn_cast<MaterializeTemporaryExpr>(E)) {
-      E = MTE->GetTemporaryExpr();
-      continue;
-    }
-
-    break;
-  }
-
-  return E;
-}
-
-const CXXRecordDecl *Expr::getBestDynamicClassType() const {
-  const Expr *E = getBestDynamicClassTypeExpr();
-  QualType DerivedType = E->getType();
-  if (const PointerType *PTy = DerivedType->getAs<PointerType>())
-    DerivedType = PTy->getPointeeType();
-
-  if (DerivedType->isDependentType())
-    return nullptr;
-
-  const RecordType *Ty = DerivedType->castAs<RecordType>();
-  Decl *D = Ty->getDecl();
-  return cast<CXXRecordDecl>(D);
-}
-
-const Expr *Expr::skipRValueSubobjectAdjustments(
-    SmallVectorImpl<const Expr *> &CommaLHSs,
-    SmallVectorImpl<SubobjectAdjustment> &Adjustments) const {
-  const Expr *E = this;
-  while (true) {
-    E = E->IgnoreParens();
-
-    if (const CastExpr *CE = dyn_cast<CastExpr>(E)) {
-      if ((CE->getCastKind() == CK_DerivedToBase ||
-           CE->getCastKind() == CK_UncheckedDerivedToBase) &&
-          E->getType()->isRecordType()) {
-        E = CE->getSubExpr();
-        CXXRecordDecl *Derived
-          = cast<CXXRecordDecl>(E->getType()->getAs<RecordType>()->getDecl());
-        Adjustments.push_back(SubobjectAdjustment(CE, Derived));
-        continue;
-      }
-
-      if (CE->getCastKind() == CK_NoOp) {
-        E = CE->getSubExpr();
-        continue;
-      }
-    } else if (const MemberExpr *ME = dyn_cast<MemberExpr>(E)) {
-      if (!ME->isArrow()) {
-        assert(ME->getBase()->getType()->isRecordType());
-        if (FieldDecl *Field = dyn_cast<FieldDecl>(ME->getMemberDecl())) {
-          if (!Field->isBitField() && !Field->getType()->isReferenceType()) {
-            E = ME->getBase();
-            Adjustments.push_back(SubobjectAdjustment(Field));
-            continue;
-          }
-        }
-      }
-    } else if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
-      if (BO->getOpcode() == BO_PtrMemD) {
-        assert(BO->getRHS()->isRValue());
-        E = BO->getLHS();
-        const MemberPointerType *MPT =
-          BO->getRHS()->getType()->getAs<MemberPointerType>();
-        Adjustments.push_back(SubobjectAdjustment(MPT, BO->getRHS()));
-        continue;
-      } else if (BO->getOpcode() == BO_Comma) {
-        CommaLHSs.push_back(BO->getLHS());
-        E = BO->getRHS();
-        continue;
-      }
-    }
-
-    // Nothing changed.
-    break;
-  }
-  return E;
-}
-
-/// isKnownToHaveBooleanValue - Return true if this is an integer expression
-/// that is known to return 0 or 1.  This happens for _Bool/bool expressions
-/// but also int expressions which are produced by things like comparisons in
-/// C.
-bool Expr::isKnownToHaveBooleanValue() const {
-  const Expr *E = IgnoreParens();
-
-  // If this value has _Bool type, it is obvious 0/1.
-  if (E->getType()->isBooleanType()) return true;
-  // If this is a non-scalar-integer type, we don't care enough to try.
-  if (!E->getType()->isIntegralOrEnumerationType()) return false;
-
-  if (const UnaryOperator *UO = dyn_cast<UnaryOperator>(E)) {
-    switch (UO->getOpcode()) {
-    case UO_Plus:
-      return UO->getSubExpr()->isKnownToHaveBooleanValue();
-    case UO_LNot:
-      return true;
-    default:
-      return false;
-    }
-  }
-
-  // Only look through implicit casts.  If the user writes
-  // '(int) (a && b)' treat it as an arbitrary int.
-  if (const ImplicitCastExpr *CE = dyn_cast<ImplicitCastExpr>(E))
-    return CE->getSubExpr()->isKnownToHaveBooleanValue();
-
-  if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
-    switch (BO->getOpcode()) {
-    default: return false;
-    case BO_LT:   // Relational operators.
-    case BO_GT:
-    case BO_LE:
-    case BO_GE:
-    case BO_EQ:   // Equality operators.
-    case BO_NE:
-    case BO_LAnd: // AND operator.
-    case BO_LOr:  // Logical OR operator.
-      return true;
-
-    case BO_And:  // Bitwise AND operator.
-    case BO_Xor:  // Bitwise XOR operator.
-    case BO_Or:   // Bitwise OR operator.
-      // Handle things like (x==2)|(y==12).
-      return BO->getLHS()->isKnownToHaveBooleanValue() &&
-             BO->getRHS()->isKnownToHaveBooleanValue();
-
-    case BO_Comma:
-    case BO_Assign:
-      return BO->getRHS()->isKnownToHaveBooleanValue();
-    }
-  }
-
-  if (const ConditionalOperator *CO = dyn_cast<ConditionalOperator>(E))
-    return CO->getTrueExpr()->isKnownToHaveBooleanValue() &&
-           CO->getFalseExpr()->isKnownToHaveBooleanValue();
-
-  return false;
-}
-
-// Amusing macro metaprogramming hack: check whether a class provides
-// a more specific implementation of getExprLoc().
-//
-// See also Stmt.cpp:{getBeginLoc(),getEndLoc()}.
-namespace {
-  /// This implementation is used when a class provides a custom
-  /// implementation of getExprLoc.
-  template <class E, class T>
-  SourceLocation getExprLocImpl(const Expr *expr,
-                                SourceLocation (T::*v)() const) {
-    return static_cast<const E*>(expr)->getExprLoc();
-  }
-
-  /// This implementation is used when a class doesn't provide
-  /// a custom implementation of getExprLoc.  Overload resolution
-  /// should pick it over the implementation above because it's
-  /// more specialized according to function template partial ordering.
-  template <class E>
-  SourceLocation getExprLocImpl(const Expr *expr,
-                                SourceLocation (Expr::*v)() const) {
-    return static_cast<const E *>(expr)->getBeginLoc();
-  }
-}
-
-SourceLocation Expr::getExprLoc() const {
-  switch (getStmtClass()) {
-  case Stmt::NoStmtClass: llvm_unreachable("statement without class");
-#define ABSTRACT_STMT(type)
-#define STMT(type, base) \
-  case Stmt::type##Class: break;
-#define EXPR(type, base) \
-  case Stmt::type##Class: return getExprLocImpl<type>(this, &type::getExprLoc);
-#include "clang/AST/StmtNodes.inc"
-  }
-  llvm_unreachable("unknown expression kind");
-}
-
-//===----------------------------------------------------------------------===//
-// Primary Expressions.
-//===----------------------------------------------------------------------===//
-
-/// Compute the type-, value-, and instantiation-dependence of a
-/// declaration reference
-/// based on the declaration being referenced.
-static void computeDeclRefDependence(const ASTContext &Ctx, NamedDecl *D,
-                                     QualType T, bool &TypeDependent,
-                                     bool &ValueDependent,
-                                     bool &InstantiationDependent) {
-  TypeDependent = false;
-  ValueDependent = false;
-  InstantiationDependent = false;
-
-  // (TD) C++ [temp.dep.expr]p3:
-  //   An id-expression is type-dependent if it contains:
-  //
-  // and
-  //
-  // (VD) C++ [temp.dep.constexpr]p2:
-  //  An identifier is value-dependent if it is:
-
-  //  (TD)  - an identifier that was declared with dependent type
-  //  (VD)  - a name declared with a dependent type,
-  if (T->isDependentType()) {
-    TypeDependent = true;
-    ValueDependent = true;
-    InstantiationDependent = true;
-    return;
-  } else if (T->isInstantiationDependentType()) {
-    InstantiationDependent = true;
-  }
-
-  //  (TD)  - a conversion-function-id that specifies a dependent type
-  if (D->getDeclName().getNameKind()
-                                == DeclarationName::CXXConversionFunctionName) {
-    QualType T = D->getDeclName().getCXXNameType();
-    if (T->isDependentType()) {
-      TypeDependent = true;
-      ValueDependent = true;
-      InstantiationDependent = true;
-      return;
-    }
-
-    if (T->isInstantiationDependentType())
-      InstantiationDependent = true;
-  }
-
-  //  (VD)  - the name of a non-type template parameter,
-  if (isa<NonTypeTemplateParmDecl>(D)) {
-    ValueDependent = true;
-    InstantiationDependent = true;
-    return;
-  }
-
-  //  (VD) - a constant with integral or enumeration type and is
-  //         initialized with an expression that is value-dependent.
-  //  (VD) - a constant with literal type and is initialized with an
-  //         expression that is value-dependent [C++11].
-  //  (VD) - FIXME: Missing from the standard:
-  //       -  an entity with reference type and is initialized with an
-  //          expression that is value-dependent [C++11]
-  if (VarDecl *Var = dyn_cast<VarDecl>(D)) {
-    if ((Ctx.getLangOpts().CPlusPlus11 ?
-           Var->getType()->isLiteralType(Ctx) :
-           Var->getType()->isIntegralOrEnumerationType()) &&
-        (Var->getType().isConstQualified() ||
-         Var->getType()->isReferenceType())) {
-      if (const Expr *Init = Var->getAnyInitializer())
-        if (Init->isValueDependent()) {
-          ValueDependent = true;
-          InstantiationDependent = true;
-        }
-    }
-
-    // (VD) - FIXME: Missing from the standard:
-    //      -  a member function or a static data member of the current
-    //         instantiation
-    if (Var->isStaticDataMember() &&
-        Var->getDeclContext()->isDependentContext()) {
-      ValueDependent = true;
-      InstantiationDependent = true;
-      TypeSourceInfo *TInfo = Var->getFirstDecl()->getTypeSourceInfo();
-      if (TInfo->getType()->isIncompleteArrayType())
-        TypeDependent = true;
-    }
-
-    return;
-  }
-
-  // (VD) - FIXME: Missing from the standard:
-  //      -  a member function or a static data member of the current
-  //         instantiation
-  if (isa<CXXMethodDecl>(D) && D->getDeclContext()->isDependentContext()) {
-    ValueDependent = true;
-    InstantiationDependent = true;
-  }
-}
-
-void DeclRefExpr::computeDependence(const ASTContext &Ctx) {
-  bool TypeDependent = false;
-  bool ValueDependent = false;
-  bool InstantiationDependent = false;
-  computeDeclRefDependence(Ctx, getDecl(), getType(), TypeDependent,
-                           ValueDependent, InstantiationDependent);
-
-  ExprBits.TypeDependent |= TypeDependent;
-  ExprBits.ValueDependent |= ValueDependent;
-  ExprBits.InstantiationDependent |= InstantiationDependent;
-
-  // Is the declaration a parameter pack?
-  if (getDecl()->isParameterPack())
-    ExprBits.ContainsUnexpandedParameterPack = true;
-}
-
-DeclRefExpr::DeclRefExpr(const ASTContext &Ctx, ValueDecl *D,
-                         bool RefersToEnclosingVariableOrCapture, QualType T,
-                         ExprValueKind VK, SourceLocation L,
-                         const DeclarationNameLoc &LocInfo)
-    : Expr(DeclRefExprClass, T, VK, OK_Ordinary, false, false, false, false),
-      D(D), DNLoc(LocInfo) {
-  DeclRefExprBits.HasQualifier = false;
-  DeclRefExprBits.HasTemplateKWAndArgsInfo = false;
-  DeclRefExprBits.HasFoundDecl = false;
-  DeclRefExprBits.HadMultipleCandidates = false;
-  DeclRefExprBits.RefersToEnclosingVariableOrCapture =
-      RefersToEnclosingVariableOrCapture;
-  DeclRefExprBits.Loc = L;
-  computeDependence(Ctx);
-}
-
-DeclRefExpr::DeclRefExpr(const ASTContext &Ctx,
-                         NestedNameSpecifierLoc QualifierLoc,
-                         SourceLocation TemplateKWLoc, ValueDecl *D,
-                         bool RefersToEnclosingVariableOrCapture,
-                         const DeclarationNameInfo &NameInfo, NamedDecl *FoundD,
-                         const TemplateArgumentListInfo *TemplateArgs,
-                         QualType T, ExprValueKind VK)
-    : Expr(DeclRefExprClass, T, VK, OK_Ordinary, false, false, false, false),
-      D(D), DNLoc(NameInfo.getInfo()) {
-  DeclRefExprBits.Loc = NameInfo.getLoc();
-  DeclRefExprBits.HasQualifier = QualifierLoc ? 1 : 0;
-  if (QualifierLoc) {
-    new (getTrailingObjects<NestedNameSpecifierLoc>())
-        NestedNameSpecifierLoc(QualifierLoc);
-    auto *NNS = QualifierLoc.getNestedNameSpecifier();
-    if (NNS->isInstantiationDependent())
-      ExprBits.InstantiationDependent = true;
-    if (NNS->containsUnexpandedParameterPack())
-      ExprBits.ContainsUnexpandedParameterPack = true;
-  }
-  DeclRefExprBits.HasFoundDecl = FoundD ? 1 : 0;
-  if (FoundD)
-    *getTrailingObjects<NamedDecl *>() = FoundD;
-  DeclRefExprBits.HasTemplateKWAndArgsInfo
-    = (TemplateArgs || TemplateKWLoc.isValid()) ? 1 : 0;
-  DeclRefExprBits.RefersToEnclosingVariableOrCapture =
-      RefersToEnclosingVariableOrCapture;
-  if (TemplateArgs) {
-    bool Dependent = false;
-    bool InstantiationDependent = false;
-    bool ContainsUnexpandedParameterPack = false;
-    getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom(
-        TemplateKWLoc, *TemplateArgs, getTrailingObjects<TemplateArgumentLoc>(),
-        Dependent, InstantiationDependent, ContainsUnexpandedParameterPack);
-    assert(!Dependent && "built a DeclRefExpr with dependent template args");
-    ExprBits.InstantiationDependent |= InstantiationDependent;
-    ExprBits.ContainsUnexpandedParameterPack |= ContainsUnexpandedParameterPack;
-  } else if (TemplateKWLoc.isValid()) {
-    getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom(
-        TemplateKWLoc);
-  }
-  DeclRefExprBits.HadMultipleCandidates = 0;
-
-  computeDependence(Ctx);
-}
-
-DeclRefExpr *DeclRefExpr::Create(const ASTContext &Context,
-                                 NestedNameSpecifierLoc QualifierLoc,
-                                 SourceLocation TemplateKWLoc,
-                                 ValueDecl *D,
-                                 bool RefersToEnclosingVariableOrCapture,
-                                 SourceLocation NameLoc,
-                                 QualType T,
-                                 ExprValueKind VK,
-                                 NamedDecl *FoundD,
-                                 const TemplateArgumentListInfo *TemplateArgs) {
-  return Create(Context, QualifierLoc, TemplateKWLoc, D,
-                RefersToEnclosingVariableOrCapture,
-                DeclarationNameInfo(D->getDeclName(), NameLoc),
-                T, VK, FoundD, TemplateArgs);
-}
-
-DeclRefExpr *DeclRefExpr::Create(const ASTContext &Context,
-                                 NestedNameSpecifierLoc QualifierLoc,
-                                 SourceLocation TemplateKWLoc,
-                                 ValueDecl *D,
-                                 bool RefersToEnclosingVariableOrCapture,
-                                 const DeclarationNameInfo &NameInfo,
-                                 QualType T,
-                                 ExprValueKind VK,
-                                 NamedDecl *FoundD,
-                                 const TemplateArgumentListInfo *TemplateArgs) {
-  // Filter out cases where the found Decl is the same as the value refenenced.
-  if (D == FoundD)
-    FoundD = nullptr;
-
-  bool HasTemplateKWAndArgsInfo = TemplateArgs || TemplateKWLoc.isValid();
-  std::size_t Size =
-      totalSizeToAlloc<NestedNameSpecifierLoc, NamedDecl *,
-                       ASTTemplateKWAndArgsInfo, TemplateArgumentLoc>(
-          QualifierLoc ? 1 : 0, FoundD ? 1 : 0,
-          HasTemplateKWAndArgsInfo ? 1 : 0,
-          TemplateArgs ? TemplateArgs->size() : 0);
-
-  void *Mem = Context.Allocate(Size, alignof(DeclRefExpr));
-  return new (Mem) DeclRefExpr(Context, QualifierLoc, TemplateKWLoc, D,
-                               RefersToEnclosingVariableOrCapture,
-                               NameInfo, FoundD, TemplateArgs, T, VK);
-}
-
-DeclRefExpr *DeclRefExpr::CreateEmpty(const ASTContext &Context,
-                                      bool HasQualifier,
-                                      bool HasFoundDecl,
-                                      bool HasTemplateKWAndArgsInfo,
-                                      unsigned NumTemplateArgs) {
-  assert(NumTemplateArgs == 0 || HasTemplateKWAndArgsInfo);
-  std::size_t Size =
-      totalSizeToAlloc<NestedNameSpecifierLoc, NamedDecl *,
-                       ASTTemplateKWAndArgsInfo, TemplateArgumentLoc>(
-          HasQualifier ? 1 : 0, HasFoundDecl ? 1 : 0, HasTemplateKWAndArgsInfo,
-          NumTemplateArgs);
-  void *Mem = Context.Allocate(Size, alignof(DeclRefExpr));
-  return new (Mem) DeclRefExpr(EmptyShell());
-}
-
-SourceLocation DeclRefExpr::getBeginLoc() const {
-  if (hasQualifier())
-    return getQualifierLoc().getBeginLoc();
-  return getNameInfo().getBeginLoc();
-}
-SourceLocation DeclRefExpr::getEndLoc() const {
-  if (hasExplicitTemplateArgs())
-    return getRAngleLoc();
-  return getNameInfo().getEndLoc();
-}
-
-PredefinedExpr::PredefinedExpr(SourceLocation L, QualType FNTy, IdentKind IK,
-                               StringLiteral *SL)
-    : Expr(PredefinedExprClass, FNTy, VK_LValue, OK_Ordinary,
-           FNTy->isDependentType(), FNTy->isDependentType(),
-           FNTy->isInstantiationDependentType(),
-           /*ContainsUnexpandedParameterPack=*/false) {
-  PredefinedExprBits.Kind = IK;
-  assert((getIdentKind() == IK) &&
-         "IdentKind do not fit in PredefinedExprBitfields!");
-  bool HasFunctionName = SL != nullptr;
-  PredefinedExprBits.HasFunctionName = HasFunctionName;
-  PredefinedExprBits.Loc = L;
-  if (HasFunctionName)
-    setFunctionName(SL);
-}
-
-PredefinedExpr::PredefinedExpr(EmptyShell Empty, bool HasFunctionName)
-    : Expr(PredefinedExprClass, Empty) {
-  PredefinedExprBits.HasFunctionName = HasFunctionName;
-}
-
-PredefinedExpr *PredefinedExpr::Create(const ASTContext &Ctx, SourceLocation L,
-                                       QualType FNTy, IdentKind IK,
-                                       StringLiteral *SL) {
-  bool HasFunctionName = SL != nullptr;
-  void *Mem = Ctx.Allocate(totalSizeToAlloc<Stmt *>(HasFunctionName),
-                           alignof(PredefinedExpr));
-  return new (Mem) PredefinedExpr(L, FNTy, IK, SL);
-}
-
-PredefinedExpr *PredefinedExpr::CreateEmpty(const ASTContext &Ctx,
-                                            bool HasFunctionName) {
-  void *Mem = Ctx.Allocate(totalSizeToAlloc<Stmt *>(HasFunctionName),
-                           alignof(PredefinedExpr));
-  return new (Mem) PredefinedExpr(EmptyShell(), HasFunctionName);
-}
-
-StringRef PredefinedExpr::getIdentKindName(PredefinedExpr::IdentKind IK) {
-  switch (IK) {
-  case Func:
-    return "__func__";
-  case Function:
-    return "__FUNCTION__";
-  case FuncDName:
-    return "__FUNCDNAME__";
-  case LFunction:
-    return "L__FUNCTION__";
-  case PrettyFunction:
-    return "__PRETTY_FUNCTION__";
-  case FuncSig:
-    return "__FUNCSIG__";
-  case LFuncSig:
-    return "L__FUNCSIG__";
-  case PrettyFunctionNoVirtual:
-    break;
-  }
-  llvm_unreachable("Unknown ident kind for PredefinedExpr");
-}
-
-// FIXME: Maybe this should use DeclPrinter with a special "print predefined
-// expr" policy instead.
-std::string PredefinedExpr::ComputeName(IdentKind IK, const Decl *CurrentDecl) {
-  ASTContext &Context = CurrentDecl->getASTContext();
-
-  if (IK == PredefinedExpr::FuncDName) {
-    if (const NamedDecl *ND = dyn_cast<NamedDecl>(CurrentDecl)) {
-      std::unique_ptr<MangleContext> MC;
-      MC.reset(Context.createMangleContext());
-
-      if (MC->shouldMangleDeclName(ND)) {
-        SmallString<256> Buffer;
-        llvm::raw_svector_ostream Out(Buffer);
-        if (const CXXConstructorDecl *CD = dyn_cast<CXXConstructorDecl>(ND))
-          MC->mangleCXXCtor(CD, Ctor_Base, Out);
-        else if (const CXXDestructorDecl *DD = dyn_cast<CXXDestructorDecl>(ND))
-          MC->mangleCXXDtor(DD, Dtor_Base, Out);
-        else
-          MC->mangleName(ND, Out);
-
-        if (!Buffer.empty() && Buffer.front() == '\01')
-          return Buffer.substr(1);
-        return Buffer.str();
-      } else
-        return ND->getIdentifier()->getName();
-    }
-    return "";
-  }
-  if (isa<BlockDecl>(CurrentDecl)) {
-    // For blocks we only emit something if it is enclosed in a function
-    // For top-level block we'd like to include the name of variable, but we
-    // don't have it at this point.
-    auto DC = CurrentDecl->getDeclContext();
-    if (DC->isFileContext())
-      return "";
-
-    SmallString<256> Buffer;
-    llvm::raw_svector_ostream Out(Buffer);
-    if (auto *DCBlock = dyn_cast<BlockDecl>(DC))
-      // For nested blocks, propagate up to the parent.
-      Out << ComputeName(IK, DCBlock);
-    else if (auto *DCDecl = dyn_cast<Decl>(DC))
-      Out << ComputeName(IK, DCDecl) << "_block_invoke";
-    return Out.str();
-  }
-  if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(CurrentDecl)) {
-    if (IK != PrettyFunction && IK != PrettyFunctionNoVirtual &&
-        IK != FuncSig && IK != LFuncSig)
-      return FD->getNameAsString();
-
-    SmallString<256> Name;
-    llvm::raw_svector_ostream Out(Name);
-
-    if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) {
-      if (MD->isVirtual() && IK != PrettyFunctionNoVirtual)
-        Out << "virtual ";
-      if (MD->isStatic())
-        Out << "static ";
-    }
-
-    PrintingPolicy Policy(Context.getLangOpts());
-    std::string Proto;
-    llvm::raw_string_ostream POut(Proto);
-
-    const FunctionDecl *Decl = FD;
-    if (const FunctionDecl* Pattern = FD->getTemplateInstantiationPattern())
-      Decl = Pattern;
-    const FunctionType *AFT = Decl->getType()->getAs<FunctionType>();
-    const FunctionProtoType *FT = nullptr;
-    if (FD->hasWrittenPrototype())
-      FT = dyn_cast<FunctionProtoType>(AFT);
-
-    if (IK == FuncSig || IK == LFuncSig) {
-      switch (AFT->getCallConv()) {
-      case CC_C: POut << "__cdecl "; break;
-      case CC_X86StdCall: POut << "__stdcall "; break;
-      case CC_X86FastCall: POut << "__fastcall "; break;
-      case CC_X86ThisCall: POut << "__thiscall "; break;
-      case CC_X86VectorCall: POut << "__vectorcall "; break;
-      case CC_X86RegCall: POut << "__regcall "; break;
-      // Only bother printing the conventions that MSVC knows about.
-      default: break;
-      }
-    }
-
-    FD->printQualifiedName(POut, Policy);
-
-    POut << "(";
-    if (FT) {
-      for (unsigned i = 0, e = Decl->getNumParams(); i != e; ++i) {
-        if (i) POut << ", ";
-        POut << Decl->getParamDecl(i)->getType().stream(Policy);
-      }
-
-      if (FT->isVariadic()) {
-        if (FD->getNumParams()) POut << ", ";
-        POut << "...";
-      } else if ((IK == FuncSig || IK == LFuncSig ||
-                  !Context.getLangOpts().CPlusPlus) &&
-                 !Decl->getNumParams()) {
-        POut << "void";
-      }
-    }
-    POut << ")";
-
-    if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) {
-      assert(FT && "We must have a written prototype in this case.");
-      if (FT->isConst())
-        POut << " const";
-      if (FT->isVolatile())
-        POut << " volatile";
-      RefQualifierKind Ref = MD->getRefQualifier();
-      if (Ref == RQ_LValue)
-        POut << " &";
-      else if (Ref == RQ_RValue)
-        POut << " &&";
-    }
-
-    typedef SmallVector<const ClassTemplateSpecializationDecl *, 8> SpecsTy;
-    SpecsTy Specs;
-    const DeclContext *Ctx = FD->getDeclContext();
-    while (Ctx && isa<NamedDecl>(Ctx)) {
-      const ClassTemplateSpecializationDecl *Spec
-                               = dyn_cast<ClassTemplateSpecializationDecl>(Ctx);
-      if (Spec && !Spec->isExplicitSpecialization())
-        Specs.push_back(Spec);
-      Ctx = Ctx->getParent();
-    }
-
-    std::string TemplateParams;
-    llvm::raw_string_ostream TOut(TemplateParams);
-    for (SpecsTy::reverse_iterator I = Specs.rbegin(), E = Specs.rend();
-         I != E; ++I) {
-      const TemplateParameterList *Params
-                  = (*I)->getSpecializedTemplate()->getTemplateParameters();
-      const TemplateArgumentList &Args = (*I)->getTemplateArgs();
-      assert(Params->size() == Args.size());
-      for (unsigned i = 0, numParams = Params->size(); i != numParams; ++i) {
-        StringRef Param = Params->getParam(i)->getName();
-        if (Param.empty()) continue;
-        TOut << Param << " = ";
-        Args.get(i).print(Policy, TOut);
-        TOut << ", ";
-      }
-    }
-
-    FunctionTemplateSpecializationInfo *FSI
-                                          = FD->getTemplateSpecializationInfo();
-    if (FSI && !FSI->isExplicitSpecialization()) {
-      const TemplateParameterList* Params
-                                  = FSI->getTemplate()->getTemplateParameters();
-      const TemplateArgumentList* Args = FSI->TemplateArguments;
-      assert(Params->size() == Args->size());
-      for (unsigned i = 0, e = Params->size(); i != e; ++i) {
-        StringRef Param = Params->getParam(i)->getName();
-        if (Param.empty()) continue;
-        TOut << Param << " = ";
-        Args->get(i).print(Policy, TOut);
-        TOut << ", ";
-      }
-    }
-
-    TOut.flush();
-    if (!TemplateParams.empty()) {
-      // remove the trailing comma and space
-      TemplateParams.resize(TemplateParams.size() - 2);
-      POut << " [" << TemplateParams << "]";
-    }
-
-    POut.flush();
-
-    // Print "auto" for all deduced return types. This includes C++1y return
-    // type deduction and lambdas. For trailing return types resolve the
-    // decltype expression. Otherwise print the real type when this is
-    // not a constructor or destructor.
-    if (isa<CXXMethodDecl>(FD) &&
-         cast<CXXMethodDecl>(FD)->getParent()->isLambda())
-      Proto = "auto " + Proto;
-    else if (FT && FT->getReturnType()->getAs<DecltypeType>())
-      FT->getReturnType()
-          ->getAs<DecltypeType>()
-          ->getUnderlyingType()
-          .getAsStringInternal(Proto, Policy);
-    else if (!isa<CXXConstructorDecl>(FD) && !isa<CXXDestructorDecl>(FD))
-      AFT->getReturnType().getAsStringInternal(Proto, Policy);
-
-    Out << Proto;
-
-    return Name.str().str();
-  }
-  if (const CapturedDecl *CD = dyn_cast<CapturedDecl>(CurrentDecl)) {
-    for (const DeclContext *DC = CD->getParent(); DC; DC = DC->getParent())
-      // Skip to its enclosing function or method, but not its enclosing
-      // CapturedDecl.
-      if (DC->isFunctionOrMethod() && (DC->getDeclKind() != Decl::Captured)) {
-        const Decl *D = Decl::castFromDeclContext(DC);
-        return ComputeName(IK, D);
-      }
-    llvm_unreachable("CapturedDecl not inside a function or method");
-  }
-  if (const ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(CurrentDecl)) {
-    SmallString<256> Name;
-    llvm::raw_svector_ostream Out(Name);
-    Out << (MD->isInstanceMethod() ? '-' : '+');
-    Out << '[';
-
-    // For incorrect code, there might not be an ObjCInterfaceDecl.  Do
-    // a null check to avoid a crash.
-    if (const ObjCInterfaceDecl *ID = MD->getClassInterface())
-      Out << *ID;
-
-    if (const ObjCCategoryImplDecl *CID =
-        dyn_cast<ObjCCategoryImplDecl>(MD->getDeclContext()))
-      Out << '(' << *CID << ')';
-
-    Out <<  ' ';
-    MD->getSelector().print(Out);
-    Out <<  ']';
-
-    return Name.str().str();
-  }
-  if (isa<TranslationUnitDecl>(CurrentDecl) && IK == PrettyFunction) {
-    // __PRETTY_FUNCTION__ -> "top level", the others produce an empty string.
-    return "top level";
-  }
-  return "";
-}
-
-void APNumericStorage::setIntValue(const ASTContext &C,
-                                   const llvm::APInt &Val) {
-  if (hasAllocation())
-    C.Deallocate(pVal);
-
-  BitWidth = Val.getBitWidth();
-  unsigned NumWords = Val.getNumWords();
-  const uint64_t* Words = Val.getRawData();
-  if (NumWords > 1) {
-    pVal = new (C) uint64_t[NumWords];
-    std::copy(Words, Words + NumWords, pVal);
-  } else if (NumWords == 1)
-    VAL = Words[0];
-  else
-    VAL = 0;
-}
-
-IntegerLiteral::IntegerLiteral(const ASTContext &C, const llvm::APInt &V,
-                               QualType type, SourceLocation l)
-  : Expr(IntegerLiteralClass, type, VK_RValue, OK_Ordinary, false, false,
-         false, false),
-    Loc(l) {
-  assert(type->isIntegerType() && "Illegal type in IntegerLiteral");
-  assert(V.getBitWidth() == C.getIntWidth(type) &&
-         "Integer type is not the correct size for constant.");
-  setValue(C, V);
-}
-
-IntegerLiteral *
-IntegerLiteral::Create(const ASTContext &C, const llvm::APInt &V,
-                       QualType type, SourceLocation l) {
-  return new (C) IntegerLiteral(C, V, type, l);
-}
-
-IntegerLiteral *
-IntegerLiteral::Create(const ASTContext &C, EmptyShell Empty) {
-  return new (C) IntegerLiteral(Empty);
-}
-
-FixedPointLiteral::FixedPointLiteral(const ASTContext &C, const llvm::APInt &V,
-                                     QualType type, SourceLocation l,
-                                     unsigned Scale)
-    : Expr(FixedPointLiteralClass, type, VK_RValue, OK_Ordinary, false, false,
-           false, false),
-      Loc(l), Scale(Scale) {
-  assert(type->isFixedPointType() && "Illegal type in FixedPointLiteral");
-  assert(V.getBitWidth() == C.getTypeInfo(type).Width &&
-         "Fixed point type is not the correct size for constant.");
-  setValue(C, V);
-}
-
-FixedPointLiteral *FixedPointLiteral::CreateFromRawInt(const ASTContext &C,
-                                                       const llvm::APInt &V,
-                                                       QualType type,
-                                                       SourceLocation l,
-                                                       unsigned Scale) {
-  return new (C) FixedPointLiteral(C, V, type, l, Scale);
-}
-
-std::string FixedPointLiteral::getValueAsString(unsigned Radix) const {
-  // Currently the longest decimal number that can be printed is the max for an
-  // unsigned long _Accum: 4294967295.99999999976716935634613037109375
-  // which is 43 characters.
-  SmallString<64> S;
-  FixedPointValueToString(
-      S, llvm::APSInt::getUnsigned(getValue().getZExtValue()), Scale);
-  return S.str();
-}
-
-FloatingLiteral::FloatingLiteral(const ASTContext &C, const llvm::APFloat &V,
-                                 bool isexact, QualType Type, SourceLocation L)
-  : Expr(FloatingLiteralClass, Type, VK_RValue, OK_Ordinary, false, false,
-         false, false), Loc(L) {
-  setSemantics(V.getSemantics());
-  FloatingLiteralBits.IsExact = isexact;
-  setValue(C, V);
-}
-
-FloatingLiteral::FloatingLiteral(const ASTContext &C, EmptyShell Empty)
-  : Expr(FloatingLiteralClass, Empty) {
-  setRawSemantics(IEEEhalf);
-  FloatingLiteralBits.IsExact = false;
-}
-
-FloatingLiteral *
-FloatingLiteral::Create(const ASTContext &C, const llvm::APFloat &V,
-                        bool isexact, QualType Type, SourceLocation L) {
-  return new (C) FloatingLiteral(C, V, isexact, Type, L);
-}
-
-FloatingLiteral *
-FloatingLiteral::Create(const ASTContext &C, EmptyShell Empty) {
-  return new (C) FloatingLiteral(C, Empty);
-}
-
-const llvm::fltSemantics &FloatingLiteral::getSemantics() const {
-  switch(FloatingLiteralBits.Semantics) {
-  case IEEEhalf:
-    return llvm::APFloat::IEEEhalf();
-  case IEEEsingle:
-    return llvm::APFloat::IEEEsingle();
-  case IEEEdouble:
-    return llvm::APFloat::IEEEdouble();
-  case x87DoubleExtended:
-    return llvm::APFloat::x87DoubleExtended();
-  case IEEEquad:
-    return llvm::APFloat::IEEEquad();
-  case PPCDoubleDouble:
-    return llvm::APFloat::PPCDoubleDouble();
-  }
-  llvm_unreachable("Unrecognised floating semantics");
-}
-
-void FloatingLiteral::setSemantics(const llvm::fltSemantics &Sem) {
-  if (&Sem == &llvm::APFloat::IEEEhalf())
-    FloatingLiteralBits.Semantics = IEEEhalf;
-  else if (&Sem == &llvm::APFloat::IEEEsingle())
-    FloatingLiteralBits.Semantics = IEEEsingle;
-  else if (&Sem == &llvm::APFloat::IEEEdouble())
-    FloatingLiteralBits.Semantics = IEEEdouble;
-  else if (&Sem == &llvm::APFloat::x87DoubleExtended())
-    FloatingLiteralBits.Semantics = x87DoubleExtended;
-  else if (&Sem == &llvm::APFloat::IEEEquad())
-    FloatingLiteralBits.Semantics = IEEEquad;
-  else if (&Sem == &llvm::APFloat::PPCDoubleDouble())
-    FloatingLiteralBits.Semantics = PPCDoubleDouble;
-  else
-    llvm_unreachable("Unknown floating semantics");
-}
-
-/// getValueAsApproximateDouble - This returns the value as an inaccurate
-/// double.  Note that this may cause loss of precision, but is useful for
-/// debugging dumps, etc.
-double FloatingLiteral::getValueAsApproximateDouble() const {
-  llvm::APFloat V = getValue();
-  bool ignored;
-  V.convert(llvm::APFloat::IEEEdouble(), llvm::APFloat::rmNearestTiesToEven,
-            &ignored);
-  return V.convertToDouble();
-}
-
-unsigned StringLiteral::mapCharByteWidth(TargetInfo const &Target,
-                                         StringKind SK) {
-  unsigned CharByteWidth = 0;
-  switch (SK) {
-  case Ascii:
-  case UTF8:
-    CharByteWidth = Target.getCharWidth();
-    break;
-  case Wide:
-    CharByteWidth = Target.getWCharWidth();
-    break;
-  case UTF16:
-    CharByteWidth = Target.getChar16Width();
-    break;
-  case UTF32:
-    CharByteWidth = Target.getChar32Width();
-    break;
-  }
-  assert((CharByteWidth & 7) == 0 && "Assumes character size is byte multiple");
-  CharByteWidth /= 8;
-  assert((CharByteWidth == 1 || CharByteWidth == 2 || CharByteWidth == 4) &&
-         "The only supported character byte widths are 1,2 and 4!");
-  return CharByteWidth;
-}
-
-StringLiteral::StringLiteral(const ASTContext &Ctx, StringRef Str,
-                             StringKind Kind, bool Pascal, QualType Ty,
-                             const SourceLocation *Loc,
-                             unsigned NumConcatenated)
-    : Expr(StringLiteralClass, Ty, VK_LValue, OK_Ordinary, false, false, false,
-           false) {
-  assert(Ctx.getAsConstantArrayType(Ty) &&
-         "StringLiteral must be of constant array type!");
-  unsigned CharByteWidth = mapCharByteWidth(Ctx.getTargetInfo(), Kind);
-  unsigned ByteLength = Str.size();
-  assert((ByteLength % CharByteWidth == 0) &&
-         "The size of the data must be a multiple of CharByteWidth!");
-
-  // Avoid the expensive division. The compiler should be able to figure it
-  // out by itself. However as of clang 7, even with the appropriate
-  // llvm_unreachable added just here, it is not able to do so.
-  unsigned Length;
-  switch (CharByteWidth) {
-  case 1:
-    Length = ByteLength;
-    break;
-  case 2:
-    Length = ByteLength / 2;
-    break;
-  case 4:
-    Length = ByteLength / 4;
-    break;
-  default:
-    llvm_unreachable("Unsupported character width!");
-  }
-
-  StringLiteralBits.Kind = Kind;
-  StringLiteralBits.CharByteWidth = CharByteWidth;
-  StringLiteralBits.IsPascal = Pascal;
-  StringLiteralBits.NumConcatenated = NumConcatenated;
-  *getTrailingObjects<unsigned>() = Length;
-
-  // Initialize the trailing array of SourceLocation.
-  // This is safe since SourceLocation is POD-like.
-  std::memcpy(getTrailingObjects<SourceLocation>(), Loc,
-              NumConcatenated * sizeof(SourceLocation));
-
-  // Initialize the trailing array of char holding the string data.
-  std::memcpy(getTrailingObjects<char>(), Str.data(), ByteLength);
-}
-
-StringLiteral::StringLiteral(EmptyShell Empty, unsigned NumConcatenated,
-                             unsigned Length, unsigned CharByteWidth)
-    : Expr(StringLiteralClass, Empty) {
-  StringLiteralBits.CharByteWidth = CharByteWidth;
-  StringLiteralBits.NumConcatenated = NumConcatenated;
-  *getTrailingObjects<unsigned>() = Length;
-}
-
-StringLiteral *StringLiteral::Create(const ASTContext &Ctx, StringRef Str,
-                                     StringKind Kind, bool Pascal, QualType Ty,
-                                     const SourceLocation *Loc,
-                                     unsigned NumConcatenated) {
-  void *Mem = Ctx.Allocate(totalSizeToAlloc<unsigned, SourceLocation, char>(
-                               1, NumConcatenated, Str.size()),
-                           alignof(StringLiteral));
-  return new (Mem)
-      StringLiteral(Ctx, Str, Kind, Pascal, Ty, Loc, NumConcatenated);
-}
-
-StringLiteral *StringLiteral::CreateEmpty(const ASTContext &Ctx,
-                                          unsigned NumConcatenated,
-                                          unsigned Length,
-                                          unsigned CharByteWidth) {
-  void *Mem = Ctx.Allocate(totalSizeToAlloc<unsigned, SourceLocation, char>(
-                               1, NumConcatenated, Length * CharByteWidth),
-                           alignof(StringLiteral));
-  return new (Mem)
-      StringLiteral(EmptyShell(), NumConcatenated, Length, CharByteWidth);
-}
-
-void StringLiteral::outputString(raw_ostream &OS) const {
-  switch (getKind()) {
-  case Ascii: break; // no prefix.
-  case Wide:  OS << 'L'; break;
-  case UTF8:  OS << "u8"; break;
-  case UTF16: OS << 'u'; break;
-  case UTF32: OS << 'U'; break;
-  }
-  OS << '"';
-  static const char Hex[] = "0123456789ABCDEF";
-
-  unsigned LastSlashX = getLength();
-  for (unsigned I = 0, N = getLength(); I != N; ++I) {
-    switch (uint32_t Char = getCodeUnit(I)) {
-    default:
-      // FIXME: Convert UTF-8 back to codepoints before rendering.
-
-      // Convert UTF-16 surrogate pairs back to codepoints before rendering.
-      // Leave invalid surrogates alone; we'll use \x for those.
-      if (getKind() == UTF16 && I != N - 1 && Char >= 0xd800 &&
-          Char <= 0xdbff) {
-        uint32_t Trail = getCodeUnit(I + 1);
-        if (Trail >= 0xdc00 && Trail <= 0xdfff) {
-          Char = 0x10000 + ((Char - 0xd800) << 10) + (Trail - 0xdc00);
-          ++I;
-        }
-      }
-
-      if (Char > 0xff) {
-        // If this is a wide string, output characters over 0xff using \x
-        // escapes. Otherwise, this is a UTF-16 or UTF-32 string, and Char is a
-        // codepoint: use \x escapes for invalid codepoints.
-        if (getKind() == Wide ||
-            (Char >= 0xd800 && Char <= 0xdfff) || Char >= 0x110000) {
-          // FIXME: Is this the best way to print wchar_t?
-          OS << "\\x";
-          int Shift = 28;
-          while ((Char >> Shift) == 0)
-            Shift -= 4;
-          for (/**/; Shift >= 0; Shift -= 4)
-            OS << Hex[(Char >> Shift) & 15];
-          LastSlashX = I;
-          break;
-        }
-
-        if (Char > 0xffff)
-          OS << "\\U00"
-             << Hex[(Char >> 20) & 15]
-             << Hex[(Char >> 16) & 15];
-        else
-          OS << "\\u";
-        OS << Hex[(Char >> 12) & 15]
-           << Hex[(Char >>  8) & 15]
-           << Hex[(Char >>  4) & 15]
-           << Hex[(Char >>  0) & 15];
-        break;
-      }
-
-      // If we used \x... for the previous character, and this character is a
-      // hexadecimal digit, prevent it being slurped as part of the \x.
-      if (LastSlashX + 1 == I) {
-        switch (Char) {
-          case '0': case '1': case '2': case '3': case '4':
-          case '5': case '6': case '7': case '8': case '9':
-          case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
-          case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
-            OS << "\"\"";
-        }
-      }
-
-      assert(Char <= 0xff &&
-             "Characters above 0xff should already have been handled.");
-
-      if (isPrintable(Char))
-        OS << (char)Char;
-      else  // Output anything hard as an octal escape.
-        OS << '\\'
-           << (char)('0' + ((Char >> 6) & 7))
-           << (char)('0' + ((Char >> 3) & 7))
-           << (char)('0' + ((Char >> 0) & 7));
-      break;
-    // Handle some common non-printable cases to make dumps prettier.
-    case '\\': OS << "\\\\"; break;
-    case '"': OS << "\\\""; break;
-    case '\a': OS << "\\a"; break;
-    case '\b': OS << "\\b"; break;
-    case '\f': OS << "\\f"; break;
-    case '\n': OS << "\\n"; break;
-    case '\r': OS << "\\r"; break;
-    case '\t': OS << "\\t"; break;
-    case '\v': OS << "\\v"; break;
-    }
-  }
-  OS << '"';
-}
-
-/// getLocationOfByte - Return a source location that points to the specified
-/// byte of this string literal.
-///
-/// Strings are amazingly complex.  They can be formed from multiple tokens and
-/// can have escape sequences in them in addition to the usual trigraph and
-/// escaped newline business.  This routine handles this complexity.
-///
-/// The *StartToken sets the first token to be searched in this function and
-/// the *StartTokenByteOffset is the byte offset of the first token. Before
-/// returning, it updates the *StartToken to the TokNo of the token being found
-/// and sets *StartTokenByteOffset to the byte offset of the token in the
-/// string.
-/// Using these two parameters can reduce the time complexity from O(n^2) to
-/// O(n) if one wants to get the location of byte for all the tokens in a
-/// string.
-///
-SourceLocation
-StringLiteral::getLocationOfByte(unsigned ByteNo, const SourceManager &SM,
-                                 const LangOptions &Features,
-                                 const TargetInfo &Target, unsigned *StartToken,
-                                 unsigned *StartTokenByteOffset) const {
-  assert((getKind() == StringLiteral::Ascii ||
-          getKind() == StringLiteral::UTF8) &&
-         "Only narrow string literals are currently supported");
-
-  // Loop over all of the tokens in this string until we find the one that
-  // contains the byte we're looking for.
-  unsigned TokNo = 0;
-  unsigned StringOffset = 0;
-  if (StartToken)
-    TokNo = *StartToken;
-  if (StartTokenByteOffset) {
-    StringOffset = *StartTokenByteOffset;
-    ByteNo -= StringOffset;
-  }
-  while (1) {
-    assert(TokNo < getNumConcatenated() && "Invalid byte number!");
-    SourceLocation StrTokLoc = getStrTokenLoc(TokNo);
-
-    // Get the spelling of the string so that we can get the data that makes up
-    // the string literal, not the identifier for the macro it is potentially
-    // expanded through.
-    SourceLocation StrTokSpellingLoc = SM.getSpellingLoc(StrTokLoc);
-
-    // Re-lex the token to get its length and original spelling.
-    std::pair<FileID, unsigned> LocInfo =
-        SM.getDecomposedLoc(StrTokSpellingLoc);
-    bool Invalid = false;
-    StringRef Buffer = SM.getBufferData(LocInfo.first, &Invalid);
-    if (Invalid) {
-      if (StartTokenByteOffset != nullptr)
-        *StartTokenByteOffset = StringOffset;
-      if (StartToken != nullptr)
-        *StartToken = TokNo;
-      return StrTokSpellingLoc;
-    }
-
-    const char *StrData = Buffer.data()+LocInfo.second;
-
-    // Create a lexer starting at the beginning of this token.
-    Lexer TheLexer(SM.getLocForStartOfFile(LocInfo.first), Features,
-                   Buffer.begin(), StrData, Buffer.end());
-    Token TheTok;
-    TheLexer.LexFromRawLexer(TheTok);
-
-    // Use the StringLiteralParser to compute the length of the string in bytes.
-    StringLiteralParser SLP(TheTok, SM, Features, Target);
-    unsigned TokNumBytes = SLP.GetStringLength();
-
-    // If the byte is in this token, return the location of the byte.
-    if (ByteNo < TokNumBytes ||
-        (ByteNo == TokNumBytes && TokNo == getNumConcatenated() - 1)) {
-      unsigned Offset = SLP.getOffsetOfStringByte(TheTok, ByteNo);
-
-      // Now that we know the offset of the token in the spelling, use the
-      // preprocessor to get the offset in the original source.
-      if (StartTokenByteOffset != nullptr)
-        *StartTokenByteOffset = StringOffset;
-      if (StartToken != nullptr)
-        *StartToken = TokNo;
-      return Lexer::AdvanceToTokenCharacter(StrTokLoc, Offset, SM, Features);
-    }
-
-    // Move to the next string token.
-    StringOffset += TokNumBytes;
-    ++TokNo;
-    ByteNo -= TokNumBytes;
-  }
-}
-
-/// getOpcodeStr - Turn an Opcode enum value into the punctuation char it
-/// corresponds to, e.g. "sizeof" or "[pre]++".
-StringRef UnaryOperator::getOpcodeStr(Opcode Op) {
-  switch (Op) {
-#define UNARY_OPERATION(Name, Spelling) case UO_##Name: return Spelling;
-#include "clang/AST/OperationKinds.def"
-  }
-  llvm_unreachable("Unknown unary operator");
-}
-
-UnaryOperatorKind
-UnaryOperator::getOverloadedOpcode(OverloadedOperatorKind OO, bool Postfix) {
-  switch (OO) {
-  default: llvm_unreachable("No unary operator for overloaded function");
-  case OO_PlusPlus:   return Postfix ? UO_PostInc : UO_PreInc;
-  case OO_MinusMinus: return Postfix ? UO_PostDec : UO_PreDec;
-  case OO_Amp:        return UO_AddrOf;
-  case OO_Star:       return UO_Deref;
-  case OO_Plus:       return UO_Plus;
-  case OO_Minus:      return UO_Minus;
-  case OO_Tilde:      return UO_Not;
-  case OO_Exclaim:    return UO_LNot;
-  case OO_Coawait:    return UO_Coawait;
-  }
-}
-
-OverloadedOperatorKind UnaryOperator::getOverloadedOperator(Opcode Opc) {
-  switch (Opc) {
-  case UO_PostInc: case UO_PreInc: return OO_PlusPlus;
-  case UO_PostDec: case UO_PreDec: return OO_MinusMinus;
-  case UO_AddrOf: return OO_Amp;
-  case UO_Deref: return OO_Star;
-  case UO_Plus: return OO_Plus;
-  case UO_Minus: return OO_Minus;
-  case UO_Not: return OO_Tilde;
-  case UO_LNot: return OO_Exclaim;
-  case UO_Coawait: return OO_Coawait;
-  default: return OO_None;
-  }
-}
-
-
-//===----------------------------------------------------------------------===//
-// Postfix Operators.
-//===----------------------------------------------------------------------===//
-
-CallExpr::CallExpr(StmtClass SC, Expr *Fn, ArrayRef<Expr *> PreArgs,
-                   ArrayRef<Expr *> Args, QualType Ty, ExprValueKind VK,
-                   SourceLocation RParenLoc, unsigned MinNumArgs,
-                   ADLCallKind UsesADL)
-    : Expr(SC, Ty, VK, OK_Ordinary, Fn->isTypeDependent(),
-           Fn->isValueDependent(), Fn->isInstantiationDependent(),
-           Fn->containsUnexpandedParameterPack()),
-      RParenLoc(RParenLoc) {
-  NumArgs = std::max<unsigned>(Args.size(), MinNumArgs);
-  unsigned NumPreArgs = PreArgs.size();
-  CallExprBits.NumPreArgs = NumPreArgs;
-  assert((NumPreArgs == getNumPreArgs()) && "NumPreArgs overflow!");
-
-  unsigned OffsetToTrailingObjects = offsetToTrailingObjects(SC);
-  CallExprBits.OffsetToTrailingObjects = OffsetToTrailingObjects;
-  assert((CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects) &&
-         "OffsetToTrailingObjects overflow!");
-
-  CallExprBits.UsesADL = static_cast<bool>(UsesADL);
-
-  setCallee(Fn);
-  for (unsigned I = 0; I != NumPreArgs; ++I) {
-    updateDependenciesFromArg(PreArgs[I]);
-    setPreArg(I, PreArgs[I]);
-  }
-  for (unsigned I = 0; I != Args.size(); ++I) {
-    updateDependenciesFromArg(Args[I]);
-    setArg(I, Args[I]);
-  }
-  for (unsigned I = Args.size(); I != NumArgs; ++I) {
-    setArg(I, nullptr);
-  }
-}
-
-CallExpr::CallExpr(StmtClass SC, unsigned NumPreArgs, unsigned NumArgs,
-                   EmptyShell Empty)
-    : Expr(SC, Empty), NumArgs(NumArgs) {
-  CallExprBits.NumPreArgs = NumPreArgs;
-  assert((NumPreArgs == getNumPreArgs()) && "NumPreArgs overflow!");
-
-  unsigned OffsetToTrailingObjects = offsetToTrailingObjects(SC);
-  CallExprBits.OffsetToTrailingObjects = OffsetToTrailingObjects;
-  assert((CallExprBits.OffsetToTrailingObjects == OffsetToTrailingObjects) &&
-         "OffsetToTrailingObjects overflow!");
-}
-
-CallExpr *CallExpr::Create(const ASTContext &Ctx, Expr *Fn,
-                           ArrayRef<Expr *> Args, QualType Ty, ExprValueKind VK,
-                           SourceLocation RParenLoc, unsigned MinNumArgs,
-                           ADLCallKind UsesADL) {
-  unsigned NumArgs = std::max<unsigned>(Args.size(), MinNumArgs);
-  unsigned SizeOfTrailingObjects =
-      CallExpr::sizeOfTrailingObjects(/*NumPreArgs=*/0, NumArgs);
-  void *Mem =
-      Ctx.Allocate(sizeof(CallExpr) + SizeOfTrailingObjects, alignof(CallExpr));
-  return new (Mem) CallExpr(CallExprClass, Fn, /*PreArgs=*/{}, Args, Ty, VK,
-                            RParenLoc, MinNumArgs, UsesADL);
-}
-
-CallExpr *CallExpr::CreateTemporary(void *Mem, Expr *Fn, QualType Ty,
-                                    ExprValueKind VK, SourceLocation RParenLoc,
-                                    ADLCallKind UsesADL) {
-  assert(!(reinterpret_cast<uintptr_t>(Mem) % alignof(CallExpr)) &&
-         "Misaligned memory in CallExpr::CreateTemporary!");
-  return new (Mem) CallExpr(CallExprClass, Fn, /*PreArgs=*/{}, /*Args=*/{}, Ty,
-                            VK, RParenLoc, /*MinNumArgs=*/0, UsesADL);
-}
-
-CallExpr *CallExpr::CreateEmpty(const ASTContext &Ctx, unsigned NumArgs,
-                                EmptyShell Empty) {
-  unsigned SizeOfTrailingObjects =
-      CallExpr::sizeOfTrailingObjects(/*NumPreArgs=*/0, NumArgs);
-  void *Mem =
-      Ctx.Allocate(sizeof(CallExpr) + SizeOfTrailingObjects, alignof(CallExpr));
-  return new (Mem) CallExpr(CallExprClass, /*NumPreArgs=*/0, NumArgs, Empty);
-}
-
-unsigned CallExpr::offsetToTrailingObjects(StmtClass SC) {
-  switch (SC) {
-  case CallExprClass:
-    return sizeof(CallExpr);
-  case CXXOperatorCallExprClass:
-    return sizeof(CXXOperatorCallExpr);
-  case CXXMemberCallExprClass:
-    return sizeof(CXXMemberCallExpr);
-  case UserDefinedLiteralClass:
-    return sizeof(UserDefinedLiteral);
-  case CUDAKernelCallExprClass:
-    return sizeof(CUDAKernelCallExpr);
-  default:
-    llvm_unreachable("unexpected class deriving from CallExpr!");
-  }
-}
-
-void CallExpr::updateDependenciesFromArg(Expr *Arg) {
-  if (Arg->isTypeDependent())
-    ExprBits.TypeDependent = true;
-  if (Arg->isValueDependent())
-    ExprBits.ValueDependent = true;
-  if (Arg->isInstantiationDependent())
-    ExprBits.InstantiationDependent = true;
-  if (Arg->containsUnexpandedParameterPack())
-    ExprBits.ContainsUnexpandedParameterPack = true;
-}
-
-Decl *Expr::getReferencedDeclOfCallee() {
-  Expr *CEE = IgnoreParenImpCasts();
-
-  while (SubstNonTypeTemplateParmExpr *NTTP
-                                = dyn_cast<SubstNonTypeTemplateParmExpr>(CEE)) {
-    CEE = NTTP->getReplacement()->IgnoreParenCasts();
-  }
-
-  // If we're calling a dereference, look at the pointer instead.
-  if (BinaryOperator *BO = dyn_cast<BinaryOperator>(CEE)) {
-    if (BO->isPtrMemOp())
-      CEE = BO->getRHS()->IgnoreParenCasts();
-  } else if (UnaryOperator *UO = dyn_cast<UnaryOperator>(CEE)) {
-    if (UO->getOpcode() == UO_Deref)
-      CEE = UO->getSubExpr()->IgnoreParenCasts();
-  }
-  if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(CEE))
-    return DRE->getDecl();
-  if (MemberExpr *ME = dyn_cast<MemberExpr>(CEE))
-    return ME->getMemberDecl();
-
-  return nullptr;
-}
-
-/// getBuiltinCallee - If this is a call to a builtin, return the builtin ID. If
-/// not, return 0.
-unsigned CallExpr::getBuiltinCallee() const {
-  // All simple function calls (e.g. func()) are implicitly cast to pointer to
-  // function. As a result, we try and obtain the DeclRefExpr from the
-  // ImplicitCastExpr.
-  const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(getCallee());
-  if (!ICE) // FIXME: deal with more complex calls (e.g. (func)(), (*func)()).
-    return 0;
-
-  const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(ICE->getSubExpr());
-  if (!DRE)
-    return 0;
-
-  const FunctionDecl *FDecl = dyn_cast<FunctionDecl>(DRE->getDecl());
-  if (!FDecl)
-    return 0;
-
-  if (!FDecl->getIdentifier())
-    return 0;
-
-  return FDecl->getBuiltinID();
-}
-
-bool CallExpr::isUnevaluatedBuiltinCall(const ASTContext &Ctx) const {
-  if (unsigned BI = getBuiltinCallee())
-    return Ctx.BuiltinInfo.isUnevaluated(BI);
-  return false;
-}
-
-QualType CallExpr::getCallReturnType(const ASTContext &Ctx) const {
-  const Expr *Callee = getCallee();
-  QualType CalleeType = Callee->getType();
-  if (const auto *FnTypePtr = CalleeType->getAs<PointerType>()) {
-    CalleeType = FnTypePtr->getPointeeType();
-  } else if (const auto *BPT = CalleeType->getAs<BlockPointerType>()) {
-    CalleeType = BPT->getPointeeType();
-  } else if (CalleeType->isSpecificPlaceholderType(BuiltinType::BoundMember)) {
-    if (isa<CXXPseudoDestructorExpr>(Callee->IgnoreParens()))
-      return Ctx.VoidTy;
-
-    // This should never be overloaded and so should never return null.
-    CalleeType = Expr::findBoundMemberType(Callee);
-  }
-
-  const FunctionType *FnType = CalleeType->castAs<FunctionType>();
-  return FnType->getReturnType();
-}
-
-const Attr *CallExpr::getUnusedResultAttr(const ASTContext &Ctx) const {
-  // If the return type is a struct, union, or enum that is marked nodiscard,
-  // then return the return type attribute.
-  if (const TagDecl *TD = getCallReturnType(Ctx)->getAsTagDecl())
-    if (const auto *A = TD->getAttr<WarnUnusedResultAttr>())
-      return A;
-
-  // Otherwise, see if the callee is marked nodiscard and return that attribute
-  // instead.
-  const Decl *D = getCalleeDecl();
-  return D ? D->getAttr<WarnUnusedResultAttr>() : nullptr;
-}
-
-SourceLocation CallExpr::getBeginLoc() const {
-  if (isa<CXXOperatorCallExpr>(this))
-    return cast<CXXOperatorCallExpr>(this)->getBeginLoc();
-
-  SourceLocation begin = getCallee()->getBeginLoc();
-  if (begin.isInvalid() && getNumArgs() > 0 && getArg(0))
-    begin = getArg(0)->getBeginLoc();
-  return begin;
-}
-SourceLocation CallExpr::getEndLoc() const {
-  if (isa<CXXOperatorCallExpr>(this))
-    return cast<CXXOperatorCallExpr>(this)->getEndLoc();
-
-  SourceLocation end = getRParenLoc();
-  if (end.isInvalid() && getNumArgs() > 0 && getArg(getNumArgs() - 1))
-    end = getArg(getNumArgs() - 1)->getEndLoc();
-  return end;
-}
-
-OffsetOfExpr *OffsetOfExpr::Create(const ASTContext &C, QualType type,
-                                   SourceLocation OperatorLoc,
-                                   TypeSourceInfo *tsi,
-                                   ArrayRef<OffsetOfNode> comps,
-                                   ArrayRef<Expr*> exprs,
-                                   SourceLocation RParenLoc) {
-  void *Mem = C.Allocate(
-      totalSizeToAlloc<OffsetOfNode, Expr *>(comps.size(), exprs.size()));
-
-  return new (Mem) OffsetOfExpr(C, type, OperatorLoc, tsi, comps, exprs,
-                                RParenLoc);
-}
-
-OffsetOfExpr *OffsetOfExpr::CreateEmpty(const ASTContext &C,
-                                        unsigned numComps, unsigned numExprs) {
-  void *Mem =
-      C.Allocate(totalSizeToAlloc<OffsetOfNode, Expr *>(numComps, numExprs));
-  return new (Mem) OffsetOfExpr(numComps, numExprs);
-}
-
-OffsetOfExpr::OffsetOfExpr(const ASTContext &C, QualType type,
-                           SourceLocation OperatorLoc, TypeSourceInfo *tsi,
-                           ArrayRef<OffsetOfNode> comps, ArrayRef<Expr*> exprs,
-                           SourceLocation RParenLoc)
-  : Expr(OffsetOfExprClass, type, VK_RValue, OK_Ordinary,
-         /*TypeDependent=*/false,
-         /*ValueDependent=*/tsi->getType()->isDependentType(),
-         tsi->getType()->isInstantiationDependentType(),
-         tsi->getType()->containsUnexpandedParameterPack()),
-    OperatorLoc(OperatorLoc), RParenLoc(RParenLoc), TSInfo(tsi),
-    NumComps(comps.size()), NumExprs(exprs.size())
-{
-  for (unsigned i = 0; i != comps.size(); ++i) {
-    setComponent(i, comps[i]);
-  }
-
-  for (unsigned i = 0; i != exprs.size(); ++i) {
-    if (exprs[i]->isTypeDependent() || exprs[i]->isValueDependent())
-      ExprBits.ValueDependent = true;
-    if (exprs[i]->containsUnexpandedParameterPack())
-      ExprBits.ContainsUnexpandedParameterPack = true;
-
-    setIndexExpr(i, exprs[i]);
-  }
-}
-
-IdentifierInfo *OffsetOfNode::getFieldName() const {
-  assert(getKind() == Field || getKind() == Identifier);
-  if (getKind() == Field)
-    return getField()->getIdentifier();
-
-  return reinterpret_cast<IdentifierInfo *> (Data & ~(uintptr_t)Mask);
-}
-
-UnaryExprOrTypeTraitExpr::UnaryExprOrTypeTraitExpr(
-    UnaryExprOrTypeTrait ExprKind, Expr *E, QualType resultType,
-    SourceLocation op, SourceLocation rp)
-    : Expr(UnaryExprOrTypeTraitExprClass, resultType, VK_RValue, OK_Ordinary,
-           false, // Never type-dependent (C++ [temp.dep.expr]p3).
-           // Value-dependent if the argument is type-dependent.
-           E->isTypeDependent(), E->isInstantiationDependent(),
-           E->containsUnexpandedParameterPack()),
-      OpLoc(op), RParenLoc(rp) {
-  UnaryExprOrTypeTraitExprBits.Kind = ExprKind;
-  UnaryExprOrTypeTraitExprBits.IsType = false;
-  Argument.Ex = E;
-
-  // Check to see if we are in the situation where alignof(decl) should be
-  // dependent because decl's alignment is dependent.
-  if (ExprKind == UETT_AlignOf || ExprKind == UETT_PreferredAlignOf) {
-    if (!isValueDependent() || !isInstantiationDependent()) {
-      E = E->IgnoreParens();
-
-      const ValueDecl *D = nullptr;
-      if (const auto *DRE = dyn_cast<DeclRefExpr>(E))
-        D = DRE->getDecl();
-      else if (const auto *ME = dyn_cast<MemberExpr>(E))
-        D = ME->getMemberDecl();
-
-      if (D) {
-        for (const auto *I : D->specific_attrs<AlignedAttr>()) {
-          if (I->isAlignmentDependent()) {
-            setValueDependent(true);
-            setInstantiationDependent(true);
-            break;
-          }
-        }
-      }
-    }
-  }
-}
-
-MemberExpr *MemberExpr::Create(
-    const ASTContext &C, Expr *base, bool isarrow, SourceLocation OperatorLoc,
-    NestedNameSpecifierLoc QualifierLoc, SourceLocation TemplateKWLoc,
-    ValueDecl *memberdecl, DeclAccessPair founddecl,
-    DeclarationNameInfo nameinfo, const TemplateArgumentListInfo *targs,
-    QualType ty, ExprValueKind vk, ExprObjectKind ok) {
-
-  bool hasQualOrFound = (QualifierLoc ||
-                         founddecl.getDecl() != memberdecl ||
-                         founddecl.getAccess() != memberdecl->getAccess());
-
-  bool HasTemplateKWAndArgsInfo = targs || TemplateKWLoc.isValid();
-  std::size_t Size =
-      totalSizeToAlloc<MemberExprNameQualifier, ASTTemplateKWAndArgsInfo,
-                       TemplateArgumentLoc>(hasQualOrFound ? 1 : 0,
-                                            HasTemplateKWAndArgsInfo ? 1 : 0,
-                                            targs ? targs->size() : 0);
-
-  void *Mem = C.Allocate(Size, alignof(MemberExpr));
-  MemberExpr *E = new (Mem)
-      MemberExpr(base, isarrow, OperatorLoc, memberdecl, nameinfo, ty, vk, ok);
-
-  if (hasQualOrFound) {
-    // FIXME: Wrong. We should be looking at the member declaration we found.
-    if (QualifierLoc && QualifierLoc.getNestedNameSpecifier()->isDependent()) {
-      E->setValueDependent(true);
-      E->setTypeDependent(true);
-      E->setInstantiationDependent(true);
-    }
-    else if (QualifierLoc &&
-             QualifierLoc.getNestedNameSpecifier()->isInstantiationDependent())
-      E->setInstantiationDependent(true);
-
-    E->MemberExprBits.HasQualifierOrFoundDecl = true;
-
-    MemberExprNameQualifier *NQ =
-        E->getTrailingObjects<MemberExprNameQualifier>();
-    NQ->QualifierLoc = QualifierLoc;
-    NQ->FoundDecl = founddecl;
-  }
-
-  E->MemberExprBits.HasTemplateKWAndArgsInfo =
-      (targs || TemplateKWLoc.isValid());
-
-  if (targs) {
-    bool Dependent = false;
-    bool InstantiationDependent = false;
-    bool ContainsUnexpandedParameterPack = false;
-    E->getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom(
-        TemplateKWLoc, *targs, E->getTrailingObjects<TemplateArgumentLoc>(),
-        Dependent, InstantiationDependent, ContainsUnexpandedParameterPack);
-    if (InstantiationDependent)
-      E->setInstantiationDependent(true);
-  } else if (TemplateKWLoc.isValid()) {
-    E->getTrailingObjects<ASTTemplateKWAndArgsInfo>()->initializeFrom(
-        TemplateKWLoc);
-  }
-
-  return E;
-}
-
-SourceLocation MemberExpr::getBeginLoc() const {
-  if (isImplicitAccess()) {
-    if (hasQualifier())
-      return getQualifierLoc().getBeginLoc();
-    return MemberLoc;
-  }
-
-  // FIXME: We don't want this to happen. Rather, we should be able to
-  // detect all kinds of implicit accesses more cleanly.
-  SourceLocation BaseStartLoc = getBase()->getBeginLoc();
-  if (BaseStartLoc.isValid())
-    return BaseStartLoc;
-  return MemberLoc;
-}
-SourceLocation MemberExpr::getEndLoc() const {
-  SourceLocation EndLoc = getMemberNameInfo().getEndLoc();
-  if (hasExplicitTemplateArgs())
-    EndLoc = getRAngleLoc();
-  else if (EndLoc.isInvalid())
-    EndLoc = getBase()->getEndLoc();
-  return EndLoc;
-}
-
-bool CastExpr::CastConsistency() const {
-  switch (getCastKind()) {
-  case CK_DerivedToBase:
-  case CK_UncheckedDerivedToBase:
-  case CK_DerivedToBaseMemberPointer:
-  case CK_BaseToDerived:
-  case CK_BaseToDerivedMemberPointer:
-    assert(!path_empty() && "Cast kind should have a base path!");
-    break;
-
-  case CK_CPointerToObjCPointerCast:
-    assert(getType()->isObjCObjectPointerType());
-    assert(getSubExpr()->getType()->isPointerType());
-    goto CheckNoBasePath;
-
-  case CK_BlockPointerToObjCPointerCast:
-    assert(getType()->isObjCObjectPointerType());
-    assert(getSubExpr()->getType()->isBlockPointerType());
-    goto CheckNoBasePath;
-
-  case CK_ReinterpretMemberPointer:
-    assert(getType()->isMemberPointerType());
-    assert(getSubExpr()->getType()->isMemberPointerType());
-    goto CheckNoBasePath;
-
-  case CK_BitCast:
-    // Arbitrary casts to C pointer types count as bitcasts.
-    // Otherwise, we should only have block and ObjC pointer casts
-    // here if they stay within the type kind.
-    if (!getType()->isPointerType()) {
-      assert(getType()->isObjCObjectPointerType() ==
-             getSubExpr()->getType()->isObjCObjectPointerType());
-      assert(getType()->isBlockPointerType() ==
-             getSubExpr()->getType()->isBlockPointerType());
-    }
-    goto CheckNoBasePath;
-
-  case CK_AnyPointerToBlockPointerCast:
-    assert(getType()->isBlockPointerType());
-    assert(getSubExpr()->getType()->isAnyPointerType() &&
-           !getSubExpr()->getType()->isBlockPointerType());
-    goto CheckNoBasePath;
-
-  case CK_CopyAndAutoreleaseBlockObject:
-    assert(getType()->isBlockPointerType());
-    assert(getSubExpr()->getType()->isBlockPointerType());
-    goto CheckNoBasePath;
-
-  case CK_FunctionToPointerDecay:
-    assert(getType()->isPointerType());
-    assert(getSubExpr()->getType()->isFunctionType());
-    goto CheckNoBasePath;
-
-  case CK_AddressSpaceConversion: {
-    auto Ty = getType();
-    auto SETy = getSubExpr()->getType();
-    assert(getValueKindForType(Ty) == Expr::getValueKindForType(SETy));
-    if (isRValue()) {
-      Ty = Ty->getPointeeType();
-      SETy = SETy->getPointeeType();
-    }
-    assert(!Ty.isNull() && !SETy.isNull() &&
-           Ty.getAddressSpace() != SETy.getAddressSpace());
-    goto CheckNoBasePath;
-  }
-  // These should not have an inheritance path.
-  case CK_Dynamic:
-  case CK_ToUnion:
-  case CK_ArrayToPointerDecay:
-  case CK_NullToMemberPointer:
-  case CK_NullToPointer:
-  case CK_ConstructorConversion:
-  case CK_IntegralToPointer:
-  case CK_PointerToIntegral:
-  case CK_ToVoid:
-  case CK_VectorSplat:
-  case CK_IntegralCast:
-  case CK_BooleanToSignedIntegral:
-  case CK_IntegralToFloating:
-  case CK_FloatingToIntegral:
-  case CK_FloatingCast:
-  case CK_ObjCObjectLValueCast:
-  case CK_FloatingRealToComplex:
-  case CK_FloatingComplexToReal:
-  case CK_FloatingComplexCast:
-  case CK_FloatingComplexToIntegralComplex:
-  case CK_IntegralRealToComplex:
-  case CK_IntegralComplexToReal:
-  case CK_IntegralComplexCast:
-  case CK_IntegralComplexToFloatingComplex:
-  case CK_ARCProduceObject:
-  case CK_ARCConsumeObject:
-  case CK_ARCReclaimReturnedObject:
-  case CK_ARCExtendBlockObject:
-  case CK_ZeroToOCLOpaqueType:
-  case CK_IntToOCLSampler:
-  case CK_FixedPointCast:
-    assert(!getType()->isBooleanType() && "unheralded conversion to bool");
-    goto CheckNoBasePath;
-
-  case CK_Dependent:
-  case CK_LValueToRValue:
-  case CK_NoOp:
-  case CK_AtomicToNonAtomic:
-  case CK_NonAtomicToAtomic:
-  case CK_PointerToBoolean:
-  case CK_IntegralToBoolean:
-  case CK_FloatingToBoolean:
-  case CK_MemberPointerToBoolean:
-  case CK_FloatingComplexToBoolean:
-  case CK_IntegralComplexToBoolean:
-  case CK_LValueBitCast:            // -> bool&
-  case CK_UserDefinedConversion:    // operator bool()
-  case CK_BuiltinFnToFnPtr:
-  case CK_FixedPointToBoolean:
-  CheckNoBasePath:
-    assert(path_empty() && "Cast kind should not have a base path!");
-    break;
-  }
-  return true;
-}
-
-const char *CastExpr::getCastKindName(CastKind CK) {
-  switch (CK) {
-#define CAST_OPERATION(Name) case CK_##Name: return #Name;
-#include "clang/AST/OperationKinds.def"
-  }
-  llvm_unreachable("Unhandled cast kind!");
-}
-
-namespace {
-  const Expr *skipImplicitTemporary(const Expr *E) {
-    // Skip through reference binding to temporary.
-    if (auto *Materialize = dyn_cast<MaterializeTemporaryExpr>(E))
-      E = Materialize->GetTemporaryExpr();
-
-    // Skip any temporary bindings; they're implicit.
-    if (auto *Binder = dyn_cast<CXXBindTemporaryExpr>(E))
-      E = Binder->getSubExpr();
-
-    return E;
-  }
-}
-
-Expr *CastExpr::getSubExprAsWritten() {
-  const Expr *SubExpr = nullptr;
-  const CastExpr *E = this;
-  do {
-    SubExpr = skipImplicitTemporary(E->getSubExpr());
-
-    // Conversions by constructor and conversion functions have a
-    // subexpression describing the call; strip it off.
-    if (E->getCastKind() == CK_ConstructorConversion)
-      SubExpr =
-        skipImplicitTemporary(cast<CXXConstructExpr>(SubExpr)->getArg(0));
-    else if (E->getCastKind() == CK_UserDefinedConversion) {
-      assert((isa<CXXMemberCallExpr>(SubExpr) ||
-              isa<BlockExpr>(SubExpr)) &&
-             "Unexpected SubExpr for CK_UserDefinedConversion.");
-      if (auto *MCE = dyn_cast<CXXMemberCallExpr>(SubExpr))
-        SubExpr = MCE->getImplicitObjectArgument();
-    }
-
-    // If the subexpression we're left with is an implicit cast, look
-    // through that, too.
-  } while ((E = dyn_cast<ImplicitCastExpr>(SubExpr)));
-
-  return const_cast<Expr*>(SubExpr);
-}
-
-NamedDecl *CastExpr::getConversionFunction() const {
-  const Expr *SubExpr = nullptr;
-
-  for (const CastExpr *E = this; E; E = dyn_cast<ImplicitCastExpr>(SubExpr)) {
-    SubExpr = skipImplicitTemporary(E->getSubExpr());
-
-    if (E->getCastKind() == CK_ConstructorConversion)
-      return cast<CXXConstructExpr>(SubExpr)->getConstructor();
-
-    if (E->getCastKind() == CK_UserDefinedConversion) {
-      if (auto *MCE = dyn_cast<CXXMemberCallExpr>(SubExpr))
-        return MCE->getMethodDecl();
-    }
-  }
-
-  return nullptr;
-}
-
-CXXBaseSpecifier **CastExpr::path_buffer() {
-  switch (getStmtClass()) {
-#define ABSTRACT_STMT(x)
-#define CASTEXPR(Type, Base)                                                   \
-  case Stmt::Type##Class:                                                      \
-    return static_cast<Type *>(this)->getTrailingObjects<CXXBaseSpecifier *>();
-#define STMT(Type, Base)
-#include "clang/AST/StmtNodes.inc"
-  default:
-    llvm_unreachable("non-cast expressions not possible here");
-  }
-}
-
-const FieldDecl *CastExpr::getTargetFieldForToUnionCast(QualType unionType,
-                                                        QualType opType) {
-  auto RD = unionType->castAs<RecordType>()->getDecl();
-  return getTargetFieldForToUnionCast(RD, opType);
-}
-
-const FieldDecl *CastExpr::getTargetFieldForToUnionCast(const RecordDecl *RD,
-                                                        QualType OpType) {
-  auto &Ctx = RD->getASTContext();
-  RecordDecl::field_iterator Field, FieldEnd;
-  for (Field = RD->field_begin(), FieldEnd = RD->field_end();
-       Field != FieldEnd; ++Field) {
-    if (Ctx.hasSameUnqualifiedType(Field->getType(), OpType) &&
-        !Field->isUnnamedBitfield()) {
-      return *Field;
-    }
-  }
-  return nullptr;
-}
-
-ImplicitCastExpr *ImplicitCastExpr::Create(const ASTContext &C, QualType T,
-                                           CastKind Kind, Expr *Operand,
-                                           const CXXCastPath *BasePath,
-                                           ExprValueKind VK) {
-  unsigned PathSize = (BasePath ? BasePath->size() : 0);
-  void *Buffer = C.Allocate(totalSizeToAlloc<CXXBaseSpecifier *>(PathSize));
-  ImplicitCastExpr *E =
-    new (Buffer) ImplicitCastExpr(T, Kind, Operand, PathSize, VK);
-  if (PathSize)
-    std::uninitialized_copy_n(BasePath->data(), BasePath->size(),
-                              E->getTrailingObjects<CXXBaseSpecifier *>());
-  return E;
-}
-
-ImplicitCastExpr *ImplicitCastExpr::CreateEmpty(const ASTContext &C,
-                                                unsigned PathSize) {
-  void *Buffer = C.Allocate(totalSizeToAlloc<CXXBaseSpecifier *>(PathSize));
-  return new (Buffer) ImplicitCastExpr(EmptyShell(), PathSize);
-}
-
-
-CStyleCastExpr *CStyleCastExpr::Create(const ASTContext &C, QualType T,
-                                       ExprValueKind VK, CastKind K, Expr *Op,
-                                       const CXXCastPath *BasePath,
-                                       TypeSourceInfo *WrittenTy,
-                                       SourceLocation L, SourceLocation R) {
-  unsigned PathSize = (BasePath ? BasePath->size() : 0);
-  void *Buffer = C.Allocate(totalSizeToAlloc<CXXBaseSpecifier *>(PathSize));
-  CStyleCastExpr *E =
-    new (Buffer) CStyleCastExpr(T, VK, K, Op, PathSize, WrittenTy, L, R);
-  if (PathSize)
-    std::uninitialized_copy_n(BasePath->data(), BasePath->size(),
-                              E->getTrailingObjects<CXXBaseSpecifier *>());
-  return E;
-}
-
-CStyleCastExpr *CStyleCastExpr::CreateEmpty(const ASTContext &C,
-                                            unsigned PathSize) {
-  void *Buffer = C.Allocate(totalSizeToAlloc<CXXBaseSpecifier *>(PathSize));
-  return new (Buffer) CStyleCastExpr(EmptyShell(), PathSize);
-}
-
-/// getOpcodeStr - Turn an Opcode enum value into the punctuation char it
-/// corresponds to, e.g. "<<=".
-StringRef BinaryOperator::getOpcodeStr(Opcode Op) {
-  switch (Op) {
-#define BINARY_OPERATION(Name, Spelling) case BO_##Name: return Spelling;
-#include "clang/AST/OperationKinds.def"
-  }
-  llvm_unreachable("Invalid OpCode!");
-}
-
-BinaryOperatorKind
-BinaryOperator::getOverloadedOpcode(OverloadedOperatorKind OO) {
-  switch (OO) {
-  default: llvm_unreachable("Not an overloadable binary operator");
-  case OO_Plus: return BO_Add;
-  case OO_Minus: return BO_Sub;
-  case OO_Star: return BO_Mul;
-  case OO_Slash: return BO_Div;
-  case OO_Percent: return BO_Rem;
-  case OO_Caret: return BO_Xor;
-  case OO_Amp: return BO_And;
-  case OO_Pipe: return BO_Or;
-  case OO_Equal: return BO_Assign;
-  case OO_Spaceship: return BO_Cmp;
-  case OO_Less: return BO_LT;
-  case OO_Greater: return BO_GT;
-  case OO_PlusEqual: return BO_AddAssign;
-  case OO_MinusEqual: return BO_SubAssign;
-  case OO_StarEqual: return BO_MulAssign;
-  case OO_SlashEqual: return BO_DivAssign;
-  case OO_PercentEqual: return BO_RemAssign;
-  case OO_CaretEqual: return BO_XorAssign;
-  case OO_AmpEqual: return BO_AndAssign;
-  case OO_PipeEqual: return BO_OrAssign;
-  case OO_LessLess: return BO_Shl;
-  case OO_GreaterGreater: return BO_Shr;
-  case OO_LessLessEqual: return BO_ShlAssign;
-  case OO_GreaterGreaterEqual: return BO_ShrAssign;
-  case OO_EqualEqual: return BO_EQ;
-  case OO_ExclaimEqual: return BO_NE;
-  case OO_LessEqual: return BO_LE;
-  case OO_GreaterEqual: return BO_GE;
-  case OO_AmpAmp: return BO_LAnd;
-  case OO_PipePipe: return BO_LOr;
-  case OO_Comma: return BO_Comma;
-  case OO_ArrowStar: return BO_PtrMemI;
-  }
-}
-
-OverloadedOperatorKind BinaryOperator::getOverloadedOperator(Opcode Opc) {
-  static const OverloadedOperatorKind OverOps[] = {
-    /* .* Cannot be overloaded */OO_None, OO_ArrowStar,
-    OO_Star, OO_Slash, OO_Percent,
-    OO_Plus, OO_Minus,
-    OO_LessLess, OO_GreaterGreater,
-    OO_Spaceship,
-    OO_Less, OO_Greater, OO_LessEqual, OO_GreaterEqual,
-    OO_EqualEqual, OO_ExclaimEqual,
-    OO_Amp,
-    OO_Caret,
-    OO_Pipe,
-    OO_AmpAmp,
-    OO_PipePipe,
-    OO_Equal, OO_StarEqual,
-    OO_SlashEqual, OO_PercentEqual,
-    OO_PlusEqual, OO_MinusEqual,
-    OO_LessLessEqual, OO_GreaterGreaterEqual,
-    OO_AmpEqual, OO_CaretEqual,
-    OO_PipeEqual,
-    OO_Comma
-  };
-  return OverOps[Opc];
-}
-
-bool BinaryOperator::isNullPointerArithmeticExtension(ASTContext &Ctx,
-                                                      Opcode Opc,
-                                                      Expr *LHS, Expr *RHS) {
-  if (Opc != BO_Add)
-    return false;
-
-  // Check that we have one pointer and one integer operand.
-  Expr *PExp;
-  if (LHS->getType()->isPointerType()) {
-    if (!RHS->getType()->isIntegerType())
-      return false;
-    PExp = LHS;
-  } else if (RHS->getType()->isPointerType()) {
-    if (!LHS->getType()->isIntegerType())
-      return false;
-    PExp = RHS;
-  } else {
-    return false;
-  }
-
-  // Check that the pointer is a nullptr.
-  if (!PExp->IgnoreParenCasts()
-          ->isNullPointerConstant(Ctx, Expr::NPC_ValueDependentIsNotNull))
-    return false;
-
-  // Check that the pointee type is char-sized.
-  const PointerType *PTy = PExp->getType()->getAs<PointerType>();
-  if (!PTy || !PTy->getPointeeType()->isCharType())
-    return false;
-
-  return true;
-}
-InitListExpr::InitListExpr(const ASTContext &C, SourceLocation lbraceloc,
-                           ArrayRef<Expr*> initExprs, SourceLocation rbraceloc)
-  : Expr(InitListExprClass, QualType(), VK_RValue, OK_Ordinary, false, false,
-         false, false),
-    InitExprs(C, initExprs.size()),
-    LBraceLoc(lbraceloc), RBraceLoc(rbraceloc), AltForm(nullptr, true)
-{
-  sawArrayRangeDesignator(false);
-  for (unsigned I = 0; I != initExprs.size(); ++I) {
-    if (initExprs[I]->isTypeDependent())
-      ExprBits.TypeDependent = true;
-    if (initExprs[I]->isValueDependent())
-      ExprBits.ValueDependent = true;
-    if (initExprs[I]->isInstantiationDependent())
-      ExprBits.InstantiationDependent = true;
-    if (initExprs[I]->containsUnexpandedParameterPack())
-      ExprBits.ContainsUnexpandedParameterPack = true;
-  }
-
-  InitExprs.insert(C, InitExprs.end(), initExprs.begin(), initExprs.end());
-}
-
-void InitListExpr::reserveInits(const ASTContext &C, unsigned NumInits) {
-  if (NumInits > InitExprs.size())
-    InitExprs.reserve(C, NumInits);
-}
-
-void InitListExpr::resizeInits(const ASTContext &C, unsigned NumInits) {
-  InitExprs.resize(C, NumInits, nullptr);
-}
-
-Expr *InitListExpr::updateInit(const ASTContext &C, unsigned Init, Expr *expr) {
-  if (Init >= InitExprs.size()) {
-    InitExprs.insert(C, InitExprs.end(), Init - InitExprs.size() + 1, nullptr);
-    setInit(Init, expr);
-    return nullptr;
-  }
-
-  Expr *Result = cast_or_null<Expr>(InitExprs[Init]);
-  setInit(Init, expr);
-  return Result;
-}
-
-void InitListExpr::setArrayFiller(Expr *filler) {
-  assert(!hasArrayFiller() && "Filler already set!");
-  ArrayFillerOrUnionFieldInit = filler;
-  // Fill out any "holes" in the array due to designated initializers.
-  Expr **inits = getInits();
-  for (unsigned i = 0, e = getNumInits(); i != e; ++i)
-    if (inits[i] == nullptr)
-      inits[i] = filler;
-}
-
-bool InitListExpr::isStringLiteralInit() const {
-  if (getNumInits() != 1)
-    return false;
-  const ArrayType *AT = getType()->getAsArrayTypeUnsafe();
-  if (!AT || !AT->getElementType()->isIntegerType())
-    return false;
-  // It is possible for getInit() to return null.
-  const Expr *Init = getInit(0);
-  if (!Init)
-    return false;
-  Init = Init->IgnoreParens();
-  return isa<StringLiteral>(Init) || isa<ObjCEncodeExpr>(Init);
-}
-
-bool InitListExpr::isTransparent() const {
-  assert(isSemanticForm() && "syntactic form never semantically transparent");
-
-  // A glvalue InitListExpr is always just sugar.
-  if (isGLValue()) {
-    assert(getNumInits() == 1 && "multiple inits in glvalue init list");
-    return true;
-  }
-
-  // Otherwise, we're sugar if and only if we have exactly one initializer that
-  // is of the same type.
-  if (getNumInits() != 1 || !getInit(0))
-    return false;
-
-  // Don't confuse aggregate initialization of a struct X { X &x; }; with a
-  // transparent struct copy.
-  if (!getInit(0)->isRValue() && getType()->isRecordType())
-    return false;
-
-  return getType().getCanonicalType() ==
-         getInit(0)->getType().getCanonicalType();
-}
-
-bool InitListExpr::isIdiomaticZeroInitializer(const LangOptions &LangOpts) const {
-  assert(isSyntacticForm() && "only test syntactic form as zero initializer");
-
-  if (LangOpts.CPlusPlus || getNumInits() != 1) {
-    return false;
-  }
-
-  const IntegerLiteral *Lit = dyn_cast<IntegerLiteral>(getInit(0));
-  return Lit && Lit->getValue() == 0;
-}
-
-SourceLocation InitListExpr::getBeginLoc() const {
-  if (InitListExpr *SyntacticForm = getSyntacticForm())
-    return SyntacticForm->getBeginLoc();
-  SourceLocation Beg = LBraceLoc;
-  if (Beg.isInvalid()) {
-    // Find the first non-null initializer.
-    for (InitExprsTy::const_iterator I = InitExprs.begin(),
-                                     E = InitExprs.end();
-      I != E; ++I) {
-      if (Stmt *S = *I) {
-        Beg = S->getBeginLoc();
-        break;
-      }
-    }
-  }
-  return Beg;
-}
-
-SourceLocation InitListExpr::getEndLoc() const {
-  if (InitListExpr *SyntacticForm = getSyntacticForm())
-    return SyntacticForm->getEndLoc();
-  SourceLocation End = RBraceLoc;
-  if (End.isInvalid()) {
-    // Find the first non-null initializer from the end.
-    for (InitExprsTy::const_reverse_iterator I = InitExprs.rbegin(),
-         E = InitExprs.rend();
-         I != E; ++I) {
-      if (Stmt *S = *I) {
-        End = S->getEndLoc();
-        break;
-      }
-    }
-  }
-  return End;
-}
-
-/// getFunctionType - Return the underlying function type for this block.
-///
-const FunctionProtoType *BlockExpr::getFunctionType() const {
-  // The block pointer is never sugared, but the function type might be.
-  return cast<BlockPointerType>(getType())
-           ->getPointeeType()->castAs<FunctionProtoType>();
-}
-
-SourceLocation BlockExpr::getCaretLocation() const {
-  return TheBlock->getCaretLocation();
-}
-const Stmt *BlockExpr::getBody() const {
-  return TheBlock->getBody();
-}
-Stmt *BlockExpr::getBody() {
-  return TheBlock->getBody();
-}
-
-
-//===----------------------------------------------------------------------===//
-// Generic Expression Routines
-//===----------------------------------------------------------------------===//
-
-/// isUnusedResultAWarning - Return true if this immediate expression should
-/// be warned about if the result is unused.  If so, fill in Loc and Ranges
-/// with location to warn on and the source range[s] to report with the
-/// warning.
-bool Expr::isUnusedResultAWarning(const Expr *&WarnE, SourceLocation &Loc,
-                                  SourceRange &R1, SourceRange &R2,
-                                  ASTContext &Ctx) const {
-  // Don't warn if the expr is type dependent. The type could end up
-  // instantiating to void.
-  if (isTypeDependent())
-    return false;
-
-  switch (getStmtClass()) {
-  default:
-    if (getType()->isVoidType())
-      return false;
-    WarnE = this;
-    Loc = getExprLoc();
-    R1 = getSourceRange();
-    return true;
-  case ParenExprClass:
-    return cast<ParenExpr>(this)->getSubExpr()->
-      isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
-  case GenericSelectionExprClass:
-    return cast<GenericSelectionExpr>(this)->getResultExpr()->
-      isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
-  case CoawaitExprClass:
-  case CoyieldExprClass:
-    return cast<CoroutineSuspendExpr>(this)->getResumeExpr()->
-      isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
-  case ChooseExprClass:
-    return cast<ChooseExpr>(this)->getChosenSubExpr()->
-      isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
-  case UnaryOperatorClass: {
-    const UnaryOperator *UO = cast<UnaryOperator>(this);
-
-    switch (UO->getOpcode()) {
-    case UO_Plus:
-    case UO_Minus:
-    case UO_AddrOf:
-    case UO_Not:
-    case UO_LNot:
-    case UO_Deref:
-      break;
-    case UO_Coawait:
-      // This is just the 'operator co_await' call inside the guts of a
-      // dependent co_await call.
-    case UO_PostInc:
-    case UO_PostDec:
-    case UO_PreInc:
-    case UO_PreDec:                 // ++/--
-      return false;  // Not a warning.
-    case UO_Real:
-    case UO_Imag:
-      // accessing a piece of a volatile complex is a side-effect.
-      if (Ctx.getCanonicalType(UO->getSubExpr()->getType())
-          .isVolatileQualified())
-        return false;
-      break;
-    case UO_Extension:
-      return UO->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
-    }
-    WarnE = this;
-    Loc = UO->getOperatorLoc();
-    R1 = UO->getSubExpr()->getSourceRange();
-    return true;
-  }
-  case BinaryOperatorClass: {
-    const BinaryOperator *BO = cast<BinaryOperator>(this);
-    switch (BO->getOpcode()) {
-      default:
-        break;
-      // Consider the RHS of comma for side effects. LHS was checked by
-      // Sema::CheckCommaOperands.
-      case BO_Comma:
-        // ((foo = <blah>), 0) is an idiom for hiding the result (and
-        // lvalue-ness) of an assignment written in a macro.
-        if (IntegerLiteral *IE =
-              dyn_cast<IntegerLiteral>(BO->getRHS()->IgnoreParens()))
-          if (IE->getValue() == 0)
-            return false;
-        return BO->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
-      // Consider '||', '&&' to have side effects if the LHS or RHS does.
-      case BO_LAnd:
-      case BO_LOr:
-        if (!BO->getLHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx) ||
-            !BO->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx))
-          return false;
-        break;
-    }
-    if (BO->isAssignmentOp())
-      return false;
-    WarnE = this;
-    Loc = BO->getOperatorLoc();
-    R1 = BO->getLHS()->getSourceRange();
-    R2 = BO->getRHS()->getSourceRange();
-    return true;
-  }
-  case CompoundAssignOperatorClass:
-  case VAArgExprClass:
-  case AtomicExprClass:
-    return false;
-
-  case ConditionalOperatorClass: {
-    // If only one of the LHS or RHS is a warning, the operator might
-    // be being used for control flow. Only warn if both the LHS and
-    // RHS are warnings.
-    const ConditionalOperator *Exp = cast<ConditionalOperator>(this);
-    if (!Exp->getRHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx))
-      return false;
-    if (!Exp->getLHS())
-      return true;
-    return Exp->getLHS()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
-  }
-
-  case MemberExprClass:
-    WarnE = this;
-    Loc = cast<MemberExpr>(this)->getMemberLoc();
-    R1 = SourceRange(Loc, Loc);
-    R2 = cast<MemberExpr>(this)->getBase()->getSourceRange();
-    return true;
-
-  case ArraySubscriptExprClass:
-    WarnE = this;
-    Loc = cast<ArraySubscriptExpr>(this)->getRBracketLoc();
-    R1 = cast<ArraySubscriptExpr>(this)->getLHS()->getSourceRange();
-    R2 = cast<ArraySubscriptExpr>(this)->getRHS()->getSourceRange();
-    return true;
-
-  case CXXOperatorCallExprClass: {
-    // Warn about operator ==,!=,<,>,<=, and >= even when user-defined operator
-    // overloads as there is no reasonable way to define these such that they
-    // have non-trivial, desirable side-effects. See the -Wunused-comparison
-    // warning: operators == and != are commonly typo'ed, and so warning on them
-    // provides additional value as well. If this list is updated,
-    // DiagnoseUnusedComparison should be as well.
-    const CXXOperatorCallExpr *Op = cast<CXXOperatorCallExpr>(this);
-    switch (Op->getOperator()) {
-    default:
-      break;
-    case OO_EqualEqual:
-    case OO_ExclaimEqual:
-    case OO_Less:
-    case OO_Greater:
-    case OO_GreaterEqual:
-    case OO_LessEqual:
-      if (Op->getCallReturnType(Ctx)->isReferenceType() ||
-          Op->getCallReturnType(Ctx)->isVoidType())
-        break;
-      WarnE = this;
-      Loc = Op->getOperatorLoc();
-      R1 = Op->getSourceRange();
-      return true;
-    }
-
-    // Fallthrough for generic call handling.
-    LLVM_FALLTHROUGH;
-  }
-  case CallExprClass:
-  case CXXMemberCallExprClass:
-  case UserDefinedLiteralClass: {
-    // If this is a direct call, get the callee.
-    const CallExpr *CE = cast<CallExpr>(this);
-    if (const Decl *FD = CE->getCalleeDecl()) {
-      // If the callee has attribute pure, const, or warn_unused_result, warn
-      // about it. void foo() { strlen("bar"); } should warn.
-      //
-      // Note: If new cases are added here, DiagnoseUnusedExprResult should be
-      // updated to match for QoI.
-      if (CE->hasUnusedResultAttr(Ctx) ||
-          FD->hasAttr<PureAttr>() || FD->hasAttr<ConstAttr>()) {
-        WarnE = this;
-        Loc = CE->getCallee()->getBeginLoc();
-        R1 = CE->getCallee()->getSourceRange();
-
-        if (unsigned NumArgs = CE->getNumArgs())
-          R2 = SourceRange(CE->getArg(0)->getBeginLoc(),
-                           CE->getArg(NumArgs - 1)->getEndLoc());
-        return true;
-      }
-    }
-    return false;
-  }
-
-  // If we don't know precisely what we're looking at, let's not warn.
-  case UnresolvedLookupExprClass:
-  case CXXUnresolvedConstructExprClass:
-    return false;
-
-  case CXXTemporaryObjectExprClass:
-  case CXXConstructExprClass: {
-    if (const CXXRecordDecl *Type = getType()->getAsCXXRecordDecl()) {
-      if (Type->hasAttr<WarnUnusedAttr>()) {
-        WarnE = this;
-        Loc = getBeginLoc();
-        R1 = getSourceRange();
-        return true;
-      }
-    }
-    return false;
-  }
-
-  case ObjCMessageExprClass: {
-    const ObjCMessageExpr *ME = cast<ObjCMessageExpr>(this);
-    if (Ctx.getLangOpts().ObjCAutoRefCount &&
-        ME->isInstanceMessage() &&
-        !ME->getType()->isVoidType() &&
-        ME->getMethodFamily() == OMF_init) {
-      WarnE = this;
-      Loc = getExprLoc();
-      R1 = ME->getSourceRange();
-      return true;
-    }
-
-    if (const ObjCMethodDecl *MD = ME->getMethodDecl())
-      if (MD->hasAttr<WarnUnusedResultAttr>()) {
-        WarnE = this;
-        Loc = getExprLoc();
-        return true;
-      }
-
-    return false;
-  }
-
-  case ObjCPropertyRefExprClass:
-    WarnE = this;
-    Loc = getExprLoc();
-    R1 = getSourceRange();
-    return true;
-
-  case PseudoObjectExprClass: {
-    const PseudoObjectExpr *PO = cast<PseudoObjectExpr>(this);
-
-    // Only complain about things that have the form of a getter.
-    if (isa<UnaryOperator>(PO->getSyntacticForm()) ||
-        isa<BinaryOperator>(PO->getSyntacticForm()))
-      return false;
-
-    WarnE = this;
-    Loc = getExprLoc();
-    R1 = getSourceRange();
-    return true;
-  }
-
-  case StmtExprClass: {
-    // Statement exprs don't logically have side effects themselves, but are
-    // sometimes used in macros in ways that give them a type that is unused.
-    // For example ({ blah; foo(); }) will end up with a type if foo has a type.
-    // however, if the result of the stmt expr is dead, we don't want to emit a
-    // warning.
-    const CompoundStmt *CS = cast<StmtExpr>(this)->getSubStmt();
-    if (!CS->body_empty()) {
-      if (const Expr *E = dyn_cast<Expr>(CS->body_back()))
-        return E->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
-      if (const LabelStmt *Label = dyn_cast<LabelStmt>(CS->body_back()))
-        if (const Expr *E = dyn_cast<Expr>(Label->getSubStmt()))
-          return E->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
-    }
-
-    if (getType()->isVoidType())
-      return false;
-    WarnE = this;
-    Loc = cast<StmtExpr>(this)->getLParenLoc();
-    R1 = getSourceRange();
-    return true;
-  }
-  case CXXFunctionalCastExprClass:
-  case CStyleCastExprClass: {
-    // Ignore an explicit cast to void unless the operand is a non-trivial
-    // volatile lvalue.
-    const CastExpr *CE = cast<CastExpr>(this);
-    if (CE->getCastKind() == CK_ToVoid) {
-      if (CE->getSubExpr()->isGLValue() &&
-          CE->getSubExpr()->getType().isVolatileQualified()) {
-        const DeclRefExpr *DRE =
-            dyn_cast<DeclRefExpr>(CE->getSubExpr()->IgnoreParens());
-        if (!(DRE && isa<VarDecl>(DRE->getDecl()) &&
-              cast<VarDecl>(DRE->getDecl())->hasLocalStorage()) &&
-            !isa<CallExpr>(CE->getSubExpr()->IgnoreParens())) {
-          return CE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc,
-                                                          R1, R2, Ctx);
-        }
-      }
-      return false;
-    }
-
-    // If this is a cast to a constructor conversion, check the operand.
-    // Otherwise, the result of the cast is unused.
-    if (CE->getCastKind() == CK_ConstructorConversion)
-      return CE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
-
-    WarnE = this;
-    if (const CXXFunctionalCastExpr *CXXCE =
-            dyn_cast<CXXFunctionalCastExpr>(this)) {
-      Loc = CXXCE->getBeginLoc();
-      R1 = CXXCE->getSubExpr()->getSourceRange();
-    } else {
-      const CStyleCastExpr *CStyleCE = cast<CStyleCastExpr>(this);
-      Loc = CStyleCE->getLParenLoc();
-      R1 = CStyleCE->getSubExpr()->getSourceRange();
-    }
-    return true;
-  }
-  case ImplicitCastExprClass: {
-    const CastExpr *ICE = cast<ImplicitCastExpr>(this);
-
-    // lvalue-to-rvalue conversion on a volatile lvalue is a side-effect.
-    if (ICE->getCastKind() == CK_LValueToRValue &&
-        ICE->getSubExpr()->getType().isVolatileQualified())
-      return false;
-
-    return ICE->getSubExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
-  }
-  case CXXDefaultArgExprClass:
-    return (cast<CXXDefaultArgExpr>(this)
-            ->getExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
-  case CXXDefaultInitExprClass:
-    return (cast<CXXDefaultInitExpr>(this)
-            ->getExpr()->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx));
-
-  case CXXNewExprClass:
-    // FIXME: In theory, there might be new expressions that don't have side
-    // effects (e.g. a placement new with an uninitialized POD).
-  case CXXDeleteExprClass:
-    return false;
-  case MaterializeTemporaryExprClass:
-    return cast<MaterializeTemporaryExpr>(this)->GetTemporaryExpr()
-               ->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
-  case CXXBindTemporaryExprClass:
-    return cast<CXXBindTemporaryExpr>(this)->getSubExpr()
-               ->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
-  case ExprWithCleanupsClass:
-    return cast<ExprWithCleanups>(this)->getSubExpr()
-               ->isUnusedResultAWarning(WarnE, Loc, R1, R2, Ctx);
-  }
-}
-
-/// isOBJCGCCandidate - Check if an expression is objc gc'able.
-/// returns true, if it is; false otherwise.
-bool Expr::isOBJCGCCandidate(ASTContext &Ctx) const {
-  const Expr *E = IgnoreParens();
-  switch (E->getStmtClass()) {
-  default:
-    return false;
-  case ObjCIvarRefExprClass:
-    return true;
-  case Expr::UnaryOperatorClass:
-    return cast<UnaryOperator>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
-  case ImplicitCastExprClass:
-    return cast<ImplicitCastExpr>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
-  case MaterializeTemporaryExprClass:
-    return cast<MaterializeTemporaryExpr>(E)->GetTemporaryExpr()
-                                                      ->isOBJCGCCandidate(Ctx);
-  case CStyleCastExprClass:
-    return cast<CStyleCastExpr>(E)->getSubExpr()->isOBJCGCCandidate(Ctx);
-  case DeclRefExprClass: {
-    const Decl *D = cast<DeclRefExpr>(E)->getDecl();
-
-    if (const VarDecl *VD = dyn_cast<VarDecl>(D)) {
-      if (VD->hasGlobalStorage())
-        return true;
-      QualType T = VD->getType();
-      // dereferencing to a  pointer is always a gc'able candidate,
-      // unless it is __weak.
-      return T->isPointerType() &&
-             (Ctx.getObjCGCAttrKind(T) != Qualifiers::Weak);
-    }
-    return false;
-  }
-  case MemberExprClass: {
-    const MemberExpr *M = cast<MemberExpr>(E);
-    return M->getBase()->isOBJCGCCandidate(Ctx);
-  }
-  case ArraySubscriptExprClass:
-    return cast<ArraySubscriptExpr>(E)->getBase()->isOBJCGCCandidate(Ctx);
-  }
-}
-
-bool Expr::isBoundMemberFunction(ASTContext &Ctx) const {
-  if (isTypeDependent())
-    return false;
-  return ClassifyLValue(Ctx) == Expr::LV_MemberFunction;
-}
-
-QualType Expr::findBoundMemberType(const Expr *expr) {
-  assert(expr->hasPlaceholderType(BuiltinType::BoundMember));
-
-  // Bound member expressions are always one of these possibilities:
-  //   x->m      x.m      x->*y      x.*y
-  // (possibly parenthesized)
-
-  expr = expr->IgnoreParens();
-  if (const MemberExpr *mem = dyn_cast<MemberExpr>(expr)) {
-    assert(isa<CXXMethodDecl>(mem->getMemberDecl()));
-    return mem->getMemberDecl()->getType();
-  }
-
-  if (const BinaryOperator *op = dyn_cast<BinaryOperator>(expr)) {
-    QualType type = op->getRHS()->getType()->castAs<MemberPointerType>()
-                      ->getPointeeType();
-    assert(type->isFunctionType());
-    return type;
-  }
-
-  assert(isa<UnresolvedMemberExpr>(expr) || isa<CXXPseudoDestructorExpr>(expr));
-  return QualType();
-}
-
-Expr* Expr::IgnoreParens() {
-  Expr* E = this;
-  while (true) {
-    if (ParenExpr* P = dyn_cast<ParenExpr>(E)) {
-      E = P->getSubExpr();
-      continue;
-    }
-    if (UnaryOperator* P = dyn_cast<UnaryOperator>(E)) {
-      if (P->getOpcode() == UO_Extension) {
-        E = P->getSubExpr();
-        continue;
-      }
-    }
-    if (GenericSelectionExpr* P = dyn_cast<GenericSelectionExpr>(E)) {
-      if (!P->isResultDependent()) {
-        E = P->getResultExpr();
-        continue;
-      }
-    }
-    if (ChooseExpr* P = dyn_cast<ChooseExpr>(E)) {
-      if (!P->isConditionDependent()) {
-        E = P->getChosenSubExpr();
-        continue;
-      }
-    }
-    if (ConstantExpr *CE = dyn_cast<ConstantExpr>(E)) {
-      E = CE->getSubExpr();
-      continue;
-    }
-    return E;
-  }
-}
-
-/// IgnoreParenCasts - Ignore parentheses and casts.  Strip off any ParenExpr
-/// or CastExprs or ImplicitCastExprs, returning their operand.
-Expr *Expr::IgnoreParenCasts() {
-  Expr *E = this;
-  while (true) {
-    E = E->IgnoreParens();
-    if (CastExpr *P = dyn_cast<CastExpr>(E)) {
-      E = P->getSubExpr();
-      continue;
-    }
-    if (MaterializeTemporaryExpr *Materialize
-                                      = dyn_cast<MaterializeTemporaryExpr>(E)) {
-      E = Materialize->GetTemporaryExpr();
-      continue;
-    }
-    if (SubstNonTypeTemplateParmExpr *NTTP
-                                  = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
-      E = NTTP->getReplacement();
-      continue;
-    }
-    if (FullExpr *FE = dyn_cast<FullExpr>(E)) {
-      E = FE->getSubExpr();
-      continue;
-    }
-    return E;
-  }
-}
-
-Expr *Expr::IgnoreCasts() {
-  Expr *E = this;
-  while (true) {
-    if (CastExpr *P = dyn_cast<CastExpr>(E)) {
-      E = P->getSubExpr();
-      continue;
-    }
-    if (MaterializeTemporaryExpr *Materialize
-        = dyn_cast<MaterializeTemporaryExpr>(E)) {
-      E = Materialize->GetTemporaryExpr();
-      continue;
-    }
-    if (SubstNonTypeTemplateParmExpr *NTTP
-        = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
-      E = NTTP->getReplacement();
-      continue;
-    }
-    if (FullExpr *FE = dyn_cast<FullExpr>(E)) {
-      E = FE->getSubExpr();
-      continue;
-    }
-    return E;
-  }
-}
-
-/// IgnoreParenLValueCasts - Ignore parentheses and lvalue-to-rvalue
-/// casts.  This is intended purely as a temporary workaround for code
-/// that hasn't yet been rewritten to do the right thing about those
-/// casts, and may disappear along with the last internal use.
-Expr *Expr::IgnoreParenLValueCasts() {
-  Expr *E = this;
-  while (true) {
-    E = E->IgnoreParens();
-    if (CastExpr *P = dyn_cast<CastExpr>(E)) {
-      if (P->getCastKind() == CK_LValueToRValue) {
-        E = P->getSubExpr();
-        continue;
-      }
-    } else if (MaterializeTemporaryExpr *Materialize
-                                      = dyn_cast<MaterializeTemporaryExpr>(E)) {
-      E = Materialize->GetTemporaryExpr();
-      continue;
-    } else if (SubstNonTypeTemplateParmExpr *NTTP
-                                  = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
-      E = NTTP->getReplacement();
-      continue;
-    } else if (FullExpr *FE = dyn_cast<FullExpr>(E)) {
-      E = FE->getSubExpr();
-      continue;
-    }
-    break;
-  }
-  return E;
-}
-
-Expr *Expr::ignoreParenBaseCasts() {
-  Expr *E = this;
-  while (true) {
-    E = E->IgnoreParens();
-    if (CastExpr *CE = dyn_cast<CastExpr>(E)) {
-      if (CE->getCastKind() == CK_DerivedToBase ||
-          CE->getCastKind() == CK_UncheckedDerivedToBase ||
-          CE->getCastKind() == CK_NoOp) {
-        E = CE->getSubExpr();
-        continue;
-      }
-    }
-
-    return E;
-  }
-}
-
-Expr *Expr::IgnoreParenImpCasts() {
-  Expr *E = this;
-  while (true) {
-    E = E->IgnoreParens();
-    if (ImplicitCastExpr *P = dyn_cast<ImplicitCastExpr>(E)) {
-      E = P->getSubExpr();
-      continue;
-    }
-    if (MaterializeTemporaryExpr *Materialize
-                                      = dyn_cast<MaterializeTemporaryExpr>(E)) {
-      E = Materialize->GetTemporaryExpr();
-      continue;
-    }
-    if (SubstNonTypeTemplateParmExpr *NTTP
-                                  = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
-      E = NTTP->getReplacement();
-      continue;
-    }
-    return E;
-  }
-}
-
-Expr *Expr::IgnoreConversionOperator() {
-  if (CXXMemberCallExpr *MCE = dyn_cast<CXXMemberCallExpr>(this)) {
-    if (MCE->getMethodDecl() && isa<CXXConversionDecl>(MCE->getMethodDecl()))
-      return MCE->getImplicitObjectArgument();
-  }
-  return this;
-}
-
-/// IgnoreParenNoopCasts - Ignore parentheses and casts that do not change the
-/// value (including ptr->int casts of the same size).  Strip off any
-/// ParenExpr or CastExprs, returning their operand.
-Expr *Expr::IgnoreParenNoopCasts(ASTContext &Ctx) {
-  Expr *E = this;
-  while (true) {
-    E = E->IgnoreParens();
-
-    if (CastExpr *P = dyn_cast<CastExpr>(E)) {
-      // We ignore integer <-> casts that are of the same width, ptr<->ptr and
-      // ptr<->int casts of the same width.  We also ignore all identity casts.
-      Expr *SE = P->getSubExpr();
-
-      if (Ctx.hasSameUnqualifiedType(E->getType(), SE->getType())) {
-        E = SE;
-        continue;
-      }
-
-      if ((E->getType()->isPointerType() ||
-           E->getType()->isIntegralType(Ctx)) &&
-          (SE->getType()->isPointerType() ||
-           SE->getType()->isIntegralType(Ctx)) &&
-          Ctx.getTypeSize(E->getType()) == Ctx.getTypeSize(SE->getType())) {
-        E = SE;
-        continue;
-      }
-    }
-
-    if (SubstNonTypeTemplateParmExpr *NTTP
-                                  = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
-      E = NTTP->getReplacement();
-      continue;
-    }
-
-    return E;
-  }
-}
-
-bool Expr::isDefaultArgument() const {
-  const Expr *E = this;
-  if (const MaterializeTemporaryExpr *M = dyn_cast<MaterializeTemporaryExpr>(E))
-    E = M->GetTemporaryExpr();
-
-  while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E))
-    E = ICE->getSubExprAsWritten();
-
-  return isa<CXXDefaultArgExpr>(E);
-}
-
-/// Skip over any no-op casts and any temporary-binding
-/// expressions.
-static const Expr *skipTemporaryBindingsNoOpCastsAndParens(const Expr *E) {
-  if (const MaterializeTemporaryExpr *M = dyn_cast<MaterializeTemporaryExpr>(E))
-    E = M->GetTemporaryExpr();
-
-  while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
-    if (ICE->getCastKind() == CK_NoOp)
-      E = ICE->getSubExpr();
-    else
-      break;
-  }
-
-  while (const CXXBindTemporaryExpr *BE = dyn_cast<CXXBindTemporaryExpr>(E))
-    E = BE->getSubExpr();
-
-  while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
-    if (ICE->getCastKind() == CK_NoOp)
-      E = ICE->getSubExpr();
-    else
-      break;
-  }
-
-  return E->IgnoreParens();
-}
-
-/// isTemporaryObject - Determines if this expression produces a
-/// temporary of the given class type.
-bool Expr::isTemporaryObject(ASTContext &C, const CXXRecordDecl *TempTy) const {
-  if (!C.hasSameUnqualifiedType(getType(), C.getTypeDeclType(TempTy)))
-    return false;
-
-  const Expr *E = skipTemporaryBindingsNoOpCastsAndParens(this);
-
-  // Temporaries are by definition pr-values of class type.
-  if (!E->Classify(C).isPRValue()) {
-    // In this context, property reference is a message call and is pr-value.
-    if (!isa<ObjCPropertyRefExpr>(E))
-      return false;
-  }
-
-  // Black-list a few cases which yield pr-values of class type that don't
-  // refer to temporaries of that type:
-
-  // - implicit derived-to-base conversions
-  if (isa<ImplicitCastExpr>(E)) {
-    switch (cast<ImplicitCastExpr>(E)->getCastKind()) {
-    case CK_DerivedToBase:
-    case CK_UncheckedDerivedToBase:
-      return false;
-    default:
-      break;
-    }
-  }
-
-  // - member expressions (all)
-  if (isa<MemberExpr>(E))
-    return false;
-
-  if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E))
-    if (BO->isPtrMemOp())
-      return false;
-
-  // - opaque values (all)
-  if (isa<OpaqueValueExpr>(E))
-    return false;
-
-  return true;
-}
-
-bool Expr::isImplicitCXXThis() const {
-  const Expr *E = this;
-
-  // Strip away parentheses and casts we don't care about.
-  while (true) {
-    if (const ParenExpr *Paren = dyn_cast<ParenExpr>(E)) {
-      E = Paren->getSubExpr();
-      continue;
-    }
-
-    if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
-      if (ICE->getCastKind() == CK_NoOp ||
-          ICE->getCastKind() == CK_LValueToRValue ||
-          ICE->getCastKind() == CK_DerivedToBase ||
-          ICE->getCastKind() == CK_UncheckedDerivedToBase) {
-        E = ICE->getSubExpr();
-        continue;
-      }
-    }
-
-    if (const UnaryOperator* UnOp = dyn_cast<UnaryOperator>(E)) {
-      if (UnOp->getOpcode() == UO_Extension) {
-        E = UnOp->getSubExpr();
-        continue;
-      }
-    }
-
-    if (const MaterializeTemporaryExpr *M
-                                      = dyn_cast<MaterializeTemporaryExpr>(E)) {
-      E = M->GetTemporaryExpr();
-      continue;
-    }
-
-    break;
-  }
-
-  if (const CXXThisExpr *This = dyn_cast<CXXThisExpr>(E))
-    return This->isImplicit();
-
-  return false;
-}
-
-/// hasAnyTypeDependentArguments - Determines if any of the expressions
-/// in Exprs is type-dependent.
-bool Expr::hasAnyTypeDependentArguments(ArrayRef<Expr *> Exprs) {
-  for (unsigned I = 0; I < Exprs.size(); ++I)
-    if (Exprs[I]->isTypeDependent())
-      return true;
-
-  return false;
-}
-
-bool Expr::isConstantInitializer(ASTContext &Ctx, bool IsForRef,
-                                 const Expr **Culprit) const {
-  // This function is attempting whether an expression is an initializer
-  // which can be evaluated at compile-time. It very closely parallels
-  // ConstExprEmitter in CGExprConstant.cpp; if they don't match, it
-  // will lead to unexpected results.  Like ConstExprEmitter, it falls back
-  // to isEvaluatable most of the time.
-  //
-  // If we ever capture reference-binding directly in the AST, we can
-  // kill the second parameter.
-
-  if (IsForRef) {
-    EvalResult Result;
-    if (EvaluateAsLValue(Result, Ctx) && !Result.HasSideEffects)
-      return true;
-    if (Culprit)
-      *Culprit = this;
-    return false;
-  }
-
-  switch (getStmtClass()) {
-  default: break;
-  case StringLiteralClass:
-  case ObjCEncodeExprClass:
-    return true;
-  case CXXTemporaryObjectExprClass:
-  case CXXConstructExprClass: {
-    const CXXConstructExpr *CE = cast<CXXConstructExpr>(this);
-
-    if (CE->getConstructor()->isTrivial() &&
-        CE->getConstructor()->getParent()->hasTrivialDestructor()) {
-      // Trivial default constructor
-      if (!CE->getNumArgs()) return true;
-
-      // Trivial copy constructor
-      assert(CE->getNumArgs() == 1 && "trivial ctor with > 1 argument");
-      return CE->getArg(0)->isConstantInitializer(Ctx, false, Culprit);
-    }
-
-    break;
-  }
-  case ConstantExprClass: {
-    // FIXME: We should be able to return "true" here, but it can lead to extra
-    // error messages. E.g. in Sema/array-init.c.
-    const Expr *Exp = cast<ConstantExpr>(this)->getSubExpr();
-    return Exp->isConstantInitializer(Ctx, false, Culprit);
-  }
-  case CompoundLiteralExprClass: {
-    // This handles gcc's extension that allows global initializers like
-    // "struct x {int x;} x = (struct x) {};".
-    // FIXME: This accepts other cases it shouldn't!
-    const Expr *Exp = cast<CompoundLiteralExpr>(this)->getInitializer();
-    return Exp->isConstantInitializer(Ctx, false, Culprit);
-  }
-  case DesignatedInitUpdateExprClass: {
-    const DesignatedInitUpdateExpr *DIUE = cast<DesignatedInitUpdateExpr>(this);
-    return DIUE->getBase()->isConstantInitializer(Ctx, false, Culprit) &&
-           DIUE->getUpdater()->isConstantInitializer(Ctx, false, Culprit);
-  }
-  case InitListExprClass: {
-    const InitListExpr *ILE = cast<InitListExpr>(this);
-    if (ILE->getType()->isArrayType()) {
-      unsigned numInits = ILE->getNumInits();
-      for (unsigned i = 0; i < numInits; i++) {
-        if (!ILE->getInit(i)->isConstantInitializer(Ctx, false, Culprit))
-          return false;
-      }
-      return true;
-    }
-
-    if (ILE->getType()->isRecordType()) {
-      unsigned ElementNo = 0;
-      RecordDecl *RD = ILE->getType()->getAs<RecordType>()->getDecl();
-      for (const auto *Field : RD->fields()) {
-        // If this is a union, skip all the fields that aren't being initialized.
-        if (RD->isUnion() && ILE->getInitializedFieldInUnion() != Field)
-          continue;
-
-        // Don't emit anonymous bitfields, they just affect layout.
-        if (Field->isUnnamedBitfield())
-          continue;
-
-        if (ElementNo < ILE->getNumInits()) {
-          const Expr *Elt = ILE->getInit(ElementNo++);
-          if (Field->isBitField()) {
-            // Bitfields have to evaluate to an integer.
-            EvalResult Result;
-            if (!Elt->EvaluateAsInt(Result, Ctx)) {
-              if (Culprit)
-                *Culprit = Elt;
-              return false;
-            }
-          } else {
-            bool RefType = Field->getType()->isReferenceType();
-            if (!Elt->isConstantInitializer(Ctx, RefType, Culprit))
-              return false;
-          }
-        }
-      }
-      return true;
-    }
-
-    break;
-  }
-  case ImplicitValueInitExprClass:
-  case NoInitExprClass:
-    return true;
-  case ParenExprClass:
-    return cast<ParenExpr>(this)->getSubExpr()
-      ->isConstantInitializer(Ctx, IsForRef, Culprit);
-  case GenericSelectionExprClass:
-    return cast<GenericSelectionExpr>(this)->getResultExpr()
-      ->isConstantInitializer(Ctx, IsForRef, Culprit);
-  case ChooseExprClass:
-    if (cast<ChooseExpr>(this)->isConditionDependent()) {
-      if (Culprit)
-        *Culprit = this;
-      return false;
-    }
-    return cast<ChooseExpr>(this)->getChosenSubExpr()
-      ->isConstantInitializer(Ctx, IsForRef, Culprit);
-  case UnaryOperatorClass: {
-    const UnaryOperator* Exp = cast<UnaryOperator>(this);
-    if (Exp->getOpcode() == UO_Extension)
-      return Exp->getSubExpr()->isConstantInitializer(Ctx, false, Culprit);
-    break;
-  }
-  case CXXFunctionalCastExprClass:
-  case CXXStaticCastExprClass:
-  case ImplicitCastExprClass:
-  case CStyleCastExprClass:
-  case ObjCBridgedCastExprClass:
-  case CXXDynamicCastExprClass:
-  case CXXReinterpretCastExprClass:
-  case CXXConstCastExprClass: {
-    const CastExpr *CE = cast<CastExpr>(this);
-
-    // Handle misc casts we want to ignore.
-    if (CE->getCastKind() == CK_NoOp ||
-        CE->getCastKind() == CK_LValueToRValue ||
-        CE->getCastKind() == CK_ToUnion ||
-        CE->getCastKind() == CK_ConstructorConversion ||
-        CE->getCastKind() == CK_NonAtomicToAtomic ||
-        CE->getCastKind() == CK_AtomicToNonAtomic ||
-        CE->getCastKind() == CK_IntToOCLSampler)
-      return CE->getSubExpr()->isConstantInitializer(Ctx, false, Culprit);
-
-    break;
-  }
-  case MaterializeTemporaryExprClass:
-    return cast<MaterializeTemporaryExpr>(this)->GetTemporaryExpr()
-      ->isConstantInitializer(Ctx, false, Culprit);
-
-  case SubstNonTypeTemplateParmExprClass:
-    return cast<SubstNonTypeTemplateParmExpr>(this)->getReplacement()
-      ->isConstantInitializer(Ctx, false, Culprit);
-  case CXXDefaultArgExprClass:
-    return cast<CXXDefaultArgExpr>(this)->getExpr()
-      ->isConstantInitializer(Ctx, false, Culprit);
-  case CXXDefaultInitExprClass:
-    return cast<CXXDefaultInitExpr>(this)->getExpr()
-      ->isConstantInitializer(Ctx, false, Culprit);
-  }
-  // Allow certain forms of UB in constant initializers: signed integer
-  // overflow and floating-point division by zero. We'll give a warning on
-  // these, but they're common enough that we have to accept them.
-  if (isEvaluatable(Ctx, SE_AllowUndefinedBehavior))
-    return true;
-  if (Culprit)
-    *Culprit = this;
-  return false;
-}
-
-bool CallExpr::isBuiltinAssumeFalse(const ASTContext &Ctx) const {
-  const FunctionDecl* FD = getDirectCallee();
-  if (!FD || (FD->getBuiltinID() != Builtin::BI__assume &&
-              FD->getBuiltinID() != Builtin::BI__builtin_assume))
-    return false;
-
-  const Expr* Arg = getArg(0);
-  bool ArgVal;
-  return !Arg->isValueDependent() &&
-         Arg->EvaluateAsBooleanCondition(ArgVal, Ctx) && !ArgVal;
-}
-
-namespace {
-  /// Look for any side effects within a Stmt.
-  class SideEffectFinder : public ConstEvaluatedExprVisitor<SideEffectFinder> {
-    typedef ConstEvaluatedExprVisitor<SideEffectFinder> Inherited;
-    const bool IncludePossibleEffects;
-    bool HasSideEffects;
-
-  public:
-    explicit SideEffectFinder(const ASTContext &Context, bool IncludePossible)
-      : Inherited(Context),
-        IncludePossibleEffects(IncludePossible), HasSideEffects(false) { }
-
-    bool hasSideEffects() const { return HasSideEffects; }
-
-    void VisitExpr(const Expr *E) {
-      if (!HasSideEffects &&
-          E->HasSideEffects(Context, IncludePossibleEffects))
-        HasSideEffects = true;
-    }
-  };
-}
-
-bool Expr::HasSideEffects(const ASTContext &Ctx,
-                          bool IncludePossibleEffects) const {
-  // In circumstances where we care about definite side effects instead of
-  // potential side effects, we want to ignore expressions that are part of a
-  // macro expansion as a potential side effect.
-  if (!IncludePossibleEffects && getExprLoc().isMacroID())
-    return false;
-
-  if (isInstantiationDependent())
-    return IncludePossibleEffects;
-
-  switch (getStmtClass()) {
-  case NoStmtClass:
-  #define ABSTRACT_STMT(Type)
-  #define STMT(Type, Base) case Type##Class:
-  #define EXPR(Type, Base)
-  #include "clang/AST/StmtNodes.inc"
-    llvm_unreachable("unexpected Expr kind");
-
-  case DependentScopeDeclRefExprClass:
-  case CXXUnresolvedConstructExprClass:
-  case CXXDependentScopeMemberExprClass:
-  case UnresolvedLookupExprClass:
-  case UnresolvedMemberExprClass:
-  case PackExpansionExprClass:
-  case SubstNonTypeTemplateParmPackExprClass:
-  case FunctionParmPackExprClass:
-  case TypoExprClass:
-  case CXXFoldExprClass:
-    llvm_unreachable("shouldn't see dependent / unresolved nodes here");
-
-  case DeclRefExprClass:
-  case ObjCIvarRefExprClass:
-  case PredefinedExprClass:
-  case IntegerLiteralClass:
-  case FixedPointLiteralClass:
-  case FloatingLiteralClass:
-  case ImaginaryLiteralClass:
-  case StringLiteralClass:
-  case CharacterLiteralClass:
-  case OffsetOfExprClass:
-  case ImplicitValueInitExprClass:
-  case UnaryExprOrTypeTraitExprClass:
-  case AddrLabelExprClass:
-  case GNUNullExprClass:
-  case ArrayInitIndexExprClass:
-  case NoInitExprClass:
-  case CXXBoolLiteralExprClass:
-  case CXXNullPtrLiteralExprClass:
-  case CXXThisExprClass:
-  case CXXScalarValueInitExprClass:
-  case TypeTraitExprClass:
-  case ArrayTypeTraitExprClass:
-  case ExpressionTraitExprClass:
-  case CXXNoexceptExprClass:
-  case SizeOfPackExprClass:
-  case ObjCStringLiteralClass:
-  case ObjCEncodeExprClass:
-  case ObjCBoolLiteralExprClass:
-  case ObjCAvailabilityCheckExprClass:
-  case CXXUuidofExprClass:
-  case OpaqueValueExprClass:
-    // These never have a side-effect.
-    return false;
-
-  case ConstantExprClass:
-    // FIXME: Move this into the "return false;" block above.
-    return cast<ConstantExpr>(this)->getSubExpr()->HasSideEffects(
-        Ctx, IncludePossibleEffects);
-
-  case CallExprClass:
-  case CXXOperatorCallExprClass:
-  case CXXMemberCallExprClass:
-  case CUDAKernelCallExprClass:
-  case UserDefinedLiteralClass: {
-    // We don't know a call definitely has side effects, except for calls
-    // to pure/const functions that definitely don't.
-    // If the call itself is considered side-effect free, check the operands.
-    const Decl *FD = cast<CallExpr>(this)->getCalleeDecl();
-    bool IsPure = FD && (FD->hasAttr<ConstAttr>() || FD->hasAttr<PureAttr>());
-    if (IsPure || !IncludePossibleEffects)
-      break;
-    return true;
-  }
-
-  case BlockExprClass:
-  case CXXBindTemporaryExprClass:
-    if (!IncludePossibleEffects)
-      break;
-    return true;
-
-  case MSPropertyRefExprClass:
-  case MSPropertySubscriptExprClass:
-  case CompoundAssignOperatorClass:
-  case VAArgExprClass:
-  case AtomicExprClass:
-  case CXXThrowExprClass:
-  case CXXNewExprClass:
-  case CXXDeleteExprClass:
-  case CoawaitExprClass:
-  case DependentCoawaitExprClass:
-  case CoyieldExprClass:
-    // These always have a side-effect.
-    return true;
-
-  case StmtExprClass: {
-    // StmtExprs have a side-effect if any substatement does.
-    SideEffectFinder Finder(Ctx, IncludePossibleEffects);
-    Finder.Visit(cast<StmtExpr>(this)->getSubStmt());
-    return Finder.hasSideEffects();
-  }
-
-  case ExprWithCleanupsClass:
-    if (IncludePossibleEffects)
-      if (cast<ExprWithCleanups>(this)->cleanupsHaveSideEffects())
-        return true;
-    break;
-
-  case ParenExprClass:
-  case ArraySubscriptExprClass:
-  case OMPArraySectionExprClass:
-  case MemberExprClass:
-  case ConditionalOperatorClass:
-  case BinaryConditionalOperatorClass:
-  case CompoundLiteralExprClass:
-  case ExtVectorElementExprClass:
-  case DesignatedInitExprClass:
-  case DesignatedInitUpdateExprClass:
-  case ArrayInitLoopExprClass:
-  case ParenListExprClass:
-  case CXXPseudoDestructorExprClass:
-  case CXXStdInitializerListExprClass:
-  case SubstNonTypeTemplateParmExprClass:
-  case MaterializeTemporaryExprClass:
-  case ShuffleVectorExprClass:
-  case ConvertVectorExprClass:
-  case AsTypeExprClass:
-    // These have a side-effect if any subexpression does.
-    break;
-
-  case UnaryOperatorClass:
-    if (cast<UnaryOperator>(this)->isIncrementDecrementOp())
-      return true;
-    break;
-
-  case BinaryOperatorClass:
-    if (cast<BinaryOperator>(this)->isAssignmentOp())
-      return true;
-    break;
-
-  case InitListExprClass:
-    // FIXME: The children for an InitListExpr doesn't include the array filler.
-    if (const Expr *E = cast<InitListExpr>(this)->getArrayFiller())
-      if (E->HasSideEffects(Ctx, IncludePossibleEffects))
-        return true;
-    break;
-
-  case GenericSelectionExprClass:
-    return cast<GenericSelectionExpr>(this)->getResultExpr()->
-        HasSideEffects(Ctx, IncludePossibleEffects);
-
-  case ChooseExprClass:
-    return cast<ChooseExpr>(this)->getChosenSubExpr()->HasSideEffects(
-        Ctx, IncludePossibleEffects);
-
-  case CXXDefaultArgExprClass:
-    return cast<CXXDefaultArgExpr>(this)->getExpr()->HasSideEffects(
-        Ctx, IncludePossibleEffects);
-
-  case CXXDefaultInitExprClass: {
-    const FieldDecl *FD = cast<CXXDefaultInitExpr>(this)->getField();
-    if (const Expr *E = FD->getInClassInitializer())
-      return E->HasSideEffects(Ctx, IncludePossibleEffects);
-    // If we've not yet parsed the initializer, assume it has side-effects.
-    return true;
-  }
-
-  case CXXDynamicCastExprClass: {
-    // A dynamic_cast expression has side-effects if it can throw.
-    const CXXDynamicCastExpr *DCE = cast<CXXDynamicCastExpr>(this);
-    if (DCE->getTypeAsWritten()->isReferenceType() &&
-        DCE->getCastKind() == CK_Dynamic)
-      return true;
-    }
-    LLVM_FALLTHROUGH;
-  case ImplicitCastExprClass:
-  case CStyleCastExprClass:
-  case CXXStaticCastExprClass:
-  case CXXReinterpretCastExprClass:
-  case CXXConstCastExprClass:
-  case CXXFunctionalCastExprClass: {
-    // While volatile reads are side-effecting in both C and C++, we treat them
-    // as having possible (not definite) side-effects. This allows idiomatic
-    // code to behave without warning, such as sizeof(*v) for a volatile-
-    // qualified pointer.
-    if (!IncludePossibleEffects)
-      break;
-
-    const CastExpr *CE = cast<CastExpr>(this);
-    if (CE->getCastKind() == CK_LValueToRValue &&
-        CE->getSubExpr()->getType().isVolatileQualified())
-      return true;
-    break;
-  }
-
-  case CXXTypeidExprClass:
-    // typeid might throw if its subexpression is potentially-evaluated, so has
-    // side-effects in that case whether or not its subexpression does.
-    return cast<CXXTypeidExpr>(this)->isPotentiallyEvaluated();
-
-  case CXXConstructExprClass:
-  case CXXTemporaryObjectExprClass: {
-    const CXXConstructExpr *CE = cast<CXXConstructExpr>(this);
-    if (!CE->getConstructor()->isTrivial() && IncludePossibleEffects)
-      return true;
-    // A trivial constructor does not add any side-effects of its own. Just look
-    // at its arguments.
-    break;
-  }
-
-  case CXXInheritedCtorInitExprClass: {
-    const auto *ICIE = cast<CXXInheritedCtorInitExpr>(this);
-    if (!ICIE->getConstructor()->isTrivial() && IncludePossibleEffects)
-      return true;
-    break;
-  }
-
-  case LambdaExprClass: {
-    const LambdaExpr *LE = cast<LambdaExpr>(this);
-    for (Expr *E : LE->capture_inits())
-      if (E->HasSideEffects(Ctx, IncludePossibleEffects))
-        return true;
-    return false;
-  }
-
-  case PseudoObjectExprClass: {
-    // Only look for side-effects in the semantic form, and look past
-    // OpaqueValueExpr bindings in that form.
-    const PseudoObjectExpr *PO = cast<PseudoObjectExpr>(this);
-    for (PseudoObjectExpr::const_semantics_iterator I = PO->semantics_begin(),
-                                                    E = PO->semantics_end();
-         I != E; ++I) {
-      const Expr *Subexpr = *I;
-      if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(Subexpr))
-        Subexpr = OVE->getSourceExpr();
-      if (Subexpr->HasSideEffects(Ctx, IncludePossibleEffects))
-        return true;
-    }
-    return false;
-  }
-
-  case ObjCBoxedExprClass:
-  case ObjCArrayLiteralClass:
-  case ObjCDictionaryLiteralClass:
-  case ObjCSelectorExprClass:
-  case ObjCProtocolExprClass:
-  case ObjCIsaExprClass:
-  case ObjCIndirectCopyRestoreExprClass:
-  case ObjCSubscriptRefExprClass:
-  case ObjCBridgedCastExprClass:
-  case ObjCMessageExprClass:
-  case ObjCPropertyRefExprClass:
-  // FIXME: Classify these cases better.
-    if (IncludePossibleEffects)
-      return true;
-    break;
-  }
-
-  // Recurse to children.
-  for (const Stmt *SubStmt : children())
-    if (SubStmt &&
-        cast<Expr>(SubStmt)->HasSideEffects(Ctx, IncludePossibleEffects))
-      return true;
-
-  return false;
-}
-
-namespace {
-  /// Look for a call to a non-trivial function within an expression.
-  class NonTrivialCallFinder : public ConstEvaluatedExprVisitor<NonTrivialCallFinder>
-  {
-    typedef ConstEvaluatedExprVisitor<NonTrivialCallFinder> Inherited;
-
-    bool NonTrivial;
-
-  public:
-    explicit NonTrivialCallFinder(const ASTContext &Context)
-      : Inherited(Context), NonTrivial(false) { }
-
-    bool hasNonTrivialCall() const { return NonTrivial; }
-
-    void VisitCallExpr(const CallExpr *E) {
-      if (const CXXMethodDecl *Method
-          = dyn_cast_or_null<const CXXMethodDecl>(E->getCalleeDecl())) {
-        if (Method->isTrivial()) {
-          // Recurse to children of the call.
-          Inherited::VisitStmt(E);
-          return;
-        }
-      }
-
-      NonTrivial = true;
-    }
-
-    void VisitCXXConstructExpr(const CXXConstructExpr *E) {
-      if (E->getConstructor()->isTrivial()) {
-        // Recurse to children of the call.
-        Inherited::VisitStmt(E);
-        return;
-      }
-
-      NonTrivial = true;
-    }
-
-    void VisitCXXBindTemporaryExpr(const CXXBindTemporaryExpr *E) {
-      if (E->getTemporary()->getDestructor()->isTrivial()) {
-        Inherited::VisitStmt(E);
-        return;
-      }
-
-      NonTrivial = true;
-    }
-  };
-}
-
-bool Expr::hasNonTrivialCall(const ASTContext &Ctx) const {
-  NonTrivialCallFinder Finder(Ctx);
-  Finder.Visit(this);
-  return Finder.hasNonTrivialCall();
-}
-
-/// isNullPointerConstant - C99 6.3.2.3p3 - Return whether this is a null
-/// pointer constant or not, as well as the specific kind of constant detected.
-/// Null pointer constants can be integer constant expressions with the
-/// value zero, casts of zero to void*, nullptr (C++0X), or __null
-/// (a GNU extension).
-Expr::NullPointerConstantKind
-Expr::isNullPointerConstant(ASTContext &Ctx,
-                            NullPointerConstantValueDependence NPC) const {
-  if (isValueDependent() &&
-      (!Ctx.getLangOpts().CPlusPlus11 || Ctx.getLangOpts().MSVCCompat)) {
-    switch (NPC) {
-    case NPC_NeverValueDependent:
-      llvm_unreachable("Unexpected value dependent expression!");
-    case NPC_ValueDependentIsNull:
-      if (isTypeDependent() || getType()->isIntegralType(Ctx))
-        return NPCK_ZeroExpression;
-      else
-        return NPCK_NotNull;
-
-    case NPC_ValueDependentIsNotNull:
-      return NPCK_NotNull;
-    }
-  }
-
-  // Strip off a cast to void*, if it exists. Except in C++.
-  if (const ExplicitCastExpr *CE = dyn_cast<ExplicitCastExpr>(this)) {
-    if (!Ctx.getLangOpts().CPlusPlus) {
-      // Check that it is a cast to void*.
-      if (const PointerType *PT = CE->getType()->getAs<PointerType>()) {
-        QualType Pointee = PT->getPointeeType();
-        Qualifiers Qs = Pointee.getQualifiers();
-        // Only (void*)0 or equivalent are treated as nullptr. If pointee type
-        // has non-default address space it is not treated as nullptr.
-        // (__generic void*)0 in OpenCL 2.0 should not be treated as nullptr
-        // since it cannot be assigned to a pointer to constant address space.
-        if ((Ctx.getLangOpts().OpenCLVersion >= 200 &&
-             Pointee.getAddressSpace() == LangAS::opencl_generic) ||
-            (Ctx.getLangOpts().OpenCL &&
-             Ctx.getLangOpts().OpenCLVersion < 200 &&
-             Pointee.getAddressSpace() == LangAS::opencl_private))
-          Qs.removeAddressSpace();
-
-        if (Pointee->isVoidType() && Qs.empty() && // to void*
-            CE->getSubExpr()->getType()->isIntegerType()) // from int
-          return CE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
-      }
-    }
-  } else if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(this)) {
-    // Ignore the ImplicitCastExpr type entirely.
-    return ICE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
-  } else if (const ParenExpr *PE = dyn_cast<ParenExpr>(this)) {
-    // Accept ((void*)0) as a null pointer constant, as many other
-    // implementations do.
-    return PE->getSubExpr()->isNullPointerConstant(Ctx, NPC);
-  } else if (const GenericSelectionExpr *GE =
-               dyn_cast<GenericSelectionExpr>(this)) {
-    if (GE->isResultDependent())
-      return NPCK_NotNull;
-    return GE->getResultExpr()->isNullPointerConstant(Ctx, NPC);
-  } else if (const ChooseExpr *CE = dyn_cast<ChooseExpr>(this)) {
-    if (CE->isConditionDependent())
-      return NPCK_NotNull;
-    return CE->getChosenSubExpr()->isNullPointerConstant(Ctx, NPC);
-  } else if (const CXXDefaultArgExpr *DefaultArg
-               = dyn_cast<CXXDefaultArgExpr>(this)) {
-    // See through default argument expressions.
-    return DefaultArg->getExpr()->isNullPointerConstant(Ctx, NPC);
-  } else if (const CXXDefaultInitExpr *DefaultInit
-               = dyn_cast<CXXDefaultInitExpr>(this)) {
-    // See through default initializer expressions.
-    return DefaultInit->getExpr()->isNullPointerConstant(Ctx, NPC);
-  } else if (isa<GNUNullExpr>(this)) {
-    // The GNU __null extension is always a null pointer constant.
-    return NPCK_GNUNull;
-  } else if (const MaterializeTemporaryExpr *M
-                                   = dyn_cast<MaterializeTemporaryExpr>(this)) {
-    return M->GetTemporaryExpr()->isNullPointerConstant(Ctx, NPC);
-  } else if (const OpaqueValueExpr *OVE = dyn_cast<OpaqueValueExpr>(this)) {
-    if (const Expr *Source = OVE->getSourceExpr())
-      return Source->isNullPointerConstant(Ctx, NPC);
-  }
-
-  // C++11 nullptr_t is always a null pointer constant.
-  if (getType()->isNullPtrType())
-    return NPCK_CXX11_nullptr;
-
-  if (const RecordType *UT = getType()->getAsUnionType())
-    if (!Ctx.getLangOpts().CPlusPlus11 &&
-        UT && UT->getDecl()->hasAttr<TransparentUnionAttr>())
-      if (const CompoundLiteralExpr *CLE = dyn_cast<CompoundLiteralExpr>(this)){
-        const Expr *InitExpr = CLE->getInitializer();
-        if (const InitListExpr *ILE = dyn_cast<InitListExpr>(InitExpr))
-          return ILE->getInit(0)->isNullPointerConstant(Ctx, NPC);
-      }
-  // This expression must be an integer type.
-  if (!getType()->isIntegerType() ||
-      (Ctx.getLangOpts().CPlusPlus && getType()->isEnumeralType()))
-    return NPCK_NotNull;
-
-  if (Ctx.getLangOpts().CPlusPlus11) {
-    // C++11 [conv.ptr]p1: A null pointer constant is an integer literal with
-    // value zero or a prvalue of type std::nullptr_t.
-    // Microsoft mode permits C++98 rules reflecting MSVC behavior.
-    const IntegerLiteral *Lit = dyn_cast<IntegerLiteral>(this);
-    if (Lit && !Lit->getValue())
-      return NPCK_ZeroLiteral;
-    else if (!Ctx.getLangOpts().MSVCCompat || !isCXX98IntegralConstantExpr(Ctx))
-      return NPCK_NotNull;
-  } else {
-    // If we have an integer constant expression, we need to *evaluate* it and
-    // test for the value 0.
-    if (!isIntegerConstantExpr(Ctx))
-      return NPCK_NotNull;
-  }
-
-  if (EvaluateKnownConstInt(Ctx) != 0)
-    return NPCK_NotNull;
-
-  if (isa<IntegerLiteral>(this))
-    return NPCK_ZeroLiteral;
-  return NPCK_ZeroExpression;
-}
-
-/// If this expression is an l-value for an Objective C
-/// property, find the underlying property reference expression.
-const ObjCPropertyRefExpr *Expr::getObjCProperty() const {
-  const Expr *E = this;
-  while (true) {
-    assert((E->getValueKind() == VK_LValue &&
-            E->getObjectKind() == OK_ObjCProperty) &&
-           "expression is not a property reference");
-    E = E->IgnoreParenCasts();
-    if (const BinaryOperator *BO = dyn_cast<BinaryOperator>(E)) {
-      if (BO->getOpcode() == BO_Comma) {
-        E = BO->getRHS();
-        continue;
-      }
-    }
-
-    break;
-  }
-
-  return cast<ObjCPropertyRefExpr>(E);
-}
-
-bool Expr::isObjCSelfExpr() const {
-  const Expr *E = IgnoreParenImpCasts();
-
-  const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E);
-  if (!DRE)
-    return false;
-
-  const ImplicitParamDecl *Param = dyn_cast<ImplicitParamDecl>(DRE->getDecl());
-  if (!Param)
-    return false;
-
-  const ObjCMethodDecl *M = dyn_cast<ObjCMethodDecl>(Param->getDeclContext());
-  if (!M)
-    return false;
-
-  return M->getSelfDecl() == Param;
-}
-
-FieldDecl *Expr::getSourceBitField() {
-  Expr *E = this->IgnoreParens();
-
-  while (ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
-    if (ICE->getCastKind() == CK_LValueToRValue ||
-        (ICE->getValueKind() != VK_RValue && ICE->getCastKind() == CK_NoOp))
-      E = ICE->getSubExpr()->IgnoreParens();
-    else
-      break;
-  }
-
-  if (MemberExpr *MemRef = dyn_cast<MemberExpr>(E))
-    if (FieldDecl *Field = dyn_cast<FieldDecl>(MemRef->getMemberDecl()))
-      if (Field->isBitField())
-        return Field;
-
-  if (ObjCIvarRefExpr *IvarRef = dyn_cast<ObjCIvarRefExpr>(E)) {
-    FieldDecl *Ivar = IvarRef->getDecl();
-    if (Ivar->isBitField())
-      return Ivar;
-  }
-
-  if (DeclRefExpr *DeclRef = dyn_cast<DeclRefExpr>(E)) {
-    if (FieldDecl *Field = dyn_cast<FieldDecl>(DeclRef->getDecl()))
-      if (Field->isBitField())
-        return Field;
-
-    if (BindingDecl *BD = dyn_cast<BindingDecl>(DeclRef->getDecl()))
-      if (Expr *E = BD->getBinding())
-        return E->getSourceBitField();
-  }
-
-  if (BinaryOperator *BinOp = dyn_cast<BinaryOperator>(E)) {
-    if (BinOp->isAssignmentOp() && BinOp->getLHS())
-      return BinOp->getLHS()->getSourceBitField();
-
-    if (BinOp->getOpcode() == BO_Comma && BinOp->getRHS())
-      return BinOp->getRHS()->getSourceBitField();
-  }
-
-  if (UnaryOperator *UnOp = dyn_cast<UnaryOperator>(E))
-    if (UnOp->isPrefix() && UnOp->isIncrementDecrementOp())
-      return UnOp->getSubExpr()->getSourceBitField();
-
-  return nullptr;
-}
-
-bool Expr::refersToVectorElement() const {
-  // FIXME: Why do we not just look at the ObjectKind here?
-  const Expr *E = this->IgnoreParens();
-
-  while (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(E)) {
-    if (ICE->getValueKind() != VK_RValue &&
-        ICE->getCastKind() == CK_NoOp)
-      E = ICE->getSubExpr()->IgnoreParens();
-    else
-      break;
-  }
-
-  if (const ArraySubscriptExpr *ASE = dyn_cast<ArraySubscriptExpr>(E))
-    return ASE->getBase()->getType()->isVectorType();
-
-  if (isa<ExtVectorElementExpr>(E))
-    return true;
-
-  if (auto *DRE = dyn_cast<DeclRefExpr>(E))
-    if (auto *BD = dyn_cast<BindingDecl>(DRE->getDecl()))
-      if (auto *E = BD->getBinding())
-        return E->refersToVectorElement();
-
-  return false;
-}
-
-bool Expr::refersToGlobalRegisterVar() const {
-  const Expr *E = this->IgnoreParenImpCasts();
-
-  if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E))
-    if (const auto *VD = dyn_cast<VarDecl>(DRE->getDecl()))
-      if (VD->getStorageClass() == SC_Register &&
-          VD->hasAttr<AsmLabelAttr>() && !VD->isLocalVarDecl())
-        return true;
-
-  return false;
-}
-
-/// isArrow - Return true if the base expression is a pointer to vector,
-/// return false if the base expression is a vector.
-bool ExtVectorElementExpr::isArrow() const {
-  return getBase()->getType()->isPointerType();
-}
-
-unsigned ExtVectorElementExpr::getNumElements() const {
-  if (const VectorType *VT = getType()->getAs<VectorType>())
-    return VT->getNumElements();
-  return 1;
-}
-
-/// containsDuplicateElements - Return true if any element access is repeated.
-bool ExtVectorElementExpr::containsDuplicateElements() const {
-  // FIXME: Refactor this code to an accessor on the AST node which returns the
-  // "type" of component access, and share with code below and in Sema.
-  StringRef Comp = Accessor->getName();
-
-  // Halving swizzles do not contain duplicate elements.
-  if (Comp == "hi" || Comp == "lo" || Comp == "even" || Comp == "odd")
-    return false;
-
-  // Advance past s-char prefix on hex swizzles.
-  if (Comp[0] == 's' || Comp[0] == 'S')
-    Comp = Comp.substr(1);
-
-  for (unsigned i = 0, e = Comp.size(); i != e; ++i)
-    if (Comp.substr(i + 1).find(Comp[i]) != StringRef::npos)
-        return true;
-
-  return false;
-}
-
-/// getEncodedElementAccess - We encode the fields as a llvm ConstantArray.
-void ExtVectorElementExpr::getEncodedElementAccess(
-    SmallVectorImpl<uint32_t> &Elts) const {
-  StringRef Comp = Accessor->getName();
-  bool isNumericAccessor = false;
-  if (Comp[0] == 's' || Comp[0] == 'S') {
-    Comp = Comp.substr(1);
-    isNumericAccessor = true;
-  }
-
-  bool isHi =   Comp == "hi";
-  bool isLo =   Comp == "lo";
-  bool isEven = Comp == "even";
-  bool isOdd  = Comp == "odd";
-
-  for (unsigned i = 0, e = getNumElements(); i != e; ++i) {
-    uint64_t Index;
-
-    if (isHi)
-      Index = e + i;
-    else if (isLo)
-      Index = i;
-    else if (isEven)
-      Index = 2 * i;
-    else if (isOdd)
-      Index = 2 * i + 1;
-    else
-      Index = ExtVectorType::getAccessorIdx(Comp[i], isNumericAccessor);
-
-    Elts.push_back(Index);
-  }
-}
-
-ShuffleVectorExpr::ShuffleVectorExpr(const ASTContext &C, ArrayRef<Expr*> args,
-                                     QualType Type, SourceLocation BLoc,
-                                     SourceLocation RP)
-   : Expr(ShuffleVectorExprClass, Type, VK_RValue, OK_Ordinary,
-          Type->isDependentType(), Type->isDependentType(),
-          Type->isInstantiationDependentType(),
-          Type->containsUnexpandedParameterPack()),
-     BuiltinLoc(BLoc), RParenLoc(RP), NumExprs(args.size())
-{
-  SubExprs = new (C) Stmt*[args.size()];
-  for (unsigned i = 0; i != args.size(); i++) {
-    if (args[i]->isTypeDependent())
-      ExprBits.TypeDependent = true;
-    if (args[i]->isValueDependent())
-      ExprBits.ValueDependent = true;
-    if (args[i]->isInstantiationDependent())
-      ExprBits.InstantiationDependent = true;
-    if (args[i]->containsUnexpandedParameterPack())
-      ExprBits.ContainsUnexpandedParameterPack = true;
-
-    SubExprs[i] = args[i];
-  }
-}
-
-void ShuffleVectorExpr::setExprs(const ASTContext &C, ArrayRef<Expr *> Exprs) {
-  if (SubExprs) C.Deallocate(SubExprs);
-
-  this->NumExprs = Exprs.size();
-  SubExprs = new (C) Stmt*[NumExprs];
-  memcpy(SubExprs, Exprs.data(), sizeof(Expr *) * Exprs.size());
-}
-
-GenericSelectionExpr::GenericSelectionExpr(const ASTContext &Context,
-                               SourceLocation GenericLoc, Expr *ControllingExpr,
-                               ArrayRef<TypeSourceInfo*> AssocTypes,
-                               ArrayRef<Expr*> AssocExprs,
-                               SourceLocation DefaultLoc,
-                               SourceLocation RParenLoc,
-                               bool ContainsUnexpandedParameterPack,
-                               unsigned ResultIndex)
-  : Expr(GenericSelectionExprClass,
-         AssocExprs[ResultIndex]->getType(),
-         AssocExprs[ResultIndex]->getValueKind(),
-         AssocExprs[ResultIndex]->getObjectKind(),
-         AssocExprs[ResultIndex]->isTypeDependent(),
-         AssocExprs[ResultIndex]->isValueDependent(),
-         AssocExprs[ResultIndex]->isInstantiationDependent(),
-         ContainsUnexpandedParameterPack),
-    AssocTypes(new (Context) TypeSourceInfo*[AssocTypes.size()]),
-    SubExprs(new (Context) Stmt*[END_EXPR+AssocExprs.size()]),
-    NumAssocs(AssocExprs.size()), ResultIndex(ResultIndex),
-    GenericLoc(GenericLoc), DefaultLoc(DefaultLoc), RParenLoc(RParenLoc) {
-  SubExprs[CONTROLLING] = ControllingExpr;
-  assert(AssocTypes.size() == AssocExprs.size());
-  std::copy(AssocTypes.begin(), AssocTypes.end(), this->AssocTypes);
-  std::copy(AssocExprs.begin(), AssocExprs.end(), SubExprs+END_EXPR);
-}
-
-GenericSelectionExpr::GenericSelectionExpr(const ASTContext &Context,
-                               SourceLocation GenericLoc, Expr *ControllingExpr,
-                               ArrayRef<TypeSourceInfo*> AssocTypes,
-                               ArrayRef<Expr*> AssocExprs,
-                               SourceLocation DefaultLoc,
-                               SourceLocation RParenLoc,
-                               bool ContainsUnexpandedParameterPack)
-  : Expr(GenericSelectionExprClass,
-         Context.DependentTy,
-         VK_RValue,
-         OK_Ordinary,
-         /*isTypeDependent=*/true,
-         /*isValueDependent=*/true,
-         /*isInstantiationDependent=*/true,
-         ContainsUnexpandedParameterPack),
-    AssocTypes(new (Context) TypeSourceInfo*[AssocTypes.size()]),
-    SubExprs(new (Context) Stmt*[END_EXPR+AssocExprs.size()]),
-    NumAssocs(AssocExprs.size()), ResultIndex(-1U), GenericLoc(GenericLoc),
-    DefaultLoc(DefaultLoc), RParenLoc(RParenLoc) {
-  SubExprs[CONTROLLING] = ControllingExpr;
-  assert(AssocTypes.size() == AssocExprs.size());
-  std::copy(AssocTypes.begin(), AssocTypes.end(), this->AssocTypes);
-  std::copy(AssocExprs.begin(), AssocExprs.end(), SubExprs+END_EXPR);
-}
-
-//===----------------------------------------------------------------------===//
-//  DesignatedInitExpr
-//===----------------------------------------------------------------------===//
-
-IdentifierInfo *DesignatedInitExpr::Designator::getFieldName() const {
-  assert(Kind == FieldDesignator && "Only valid on a field designator");
-  if (Field.NameOrField & 0x01)
-    return reinterpret_cast<IdentifierInfo *>(Field.NameOrField&~0x01);
-  else
-    return getField()->getIdentifier();
-}
-
-DesignatedInitExpr::DesignatedInitExpr(const ASTContext &C, QualType Ty,
-                                       llvm::ArrayRef<Designator> Designators,
-                                       SourceLocation EqualOrColonLoc,
-                                       bool GNUSyntax,
-                                       ArrayRef<Expr*> IndexExprs,
-                                       Expr *Init)
-  : Expr(DesignatedInitExprClass, Ty,
-         Init->getValueKind(), Init->getObjectKind(),
-         Init->isTypeDependent(), Init->isValueDependent(),
-         Init->isInstantiationDependent(),
-         Init->containsUnexpandedParameterPack()),
-    EqualOrColonLoc(EqualOrColonLoc), GNUSyntax(GNUSyntax),
-    NumDesignators(Designators.size()), NumSubExprs(IndexExprs.size() + 1) {
-  this->Designators = new (C) Designator[NumDesignators];
-
-  // Record the initializer itself.
-  child_iterator Child = child_begin();
-  *Child++ = Init;
-
-  // Copy the designators and their subexpressions, computing
-  // value-dependence along the way.
-  unsigned IndexIdx = 0;
-  for (unsigned I = 0; I != NumDesignators; ++I) {
-    this->Designators[I] = Designators[I];
-
-    if (this->Designators[I].isArrayDesignator()) {
-      // Compute type- and value-dependence.
-      Expr *Index = IndexExprs[IndexIdx];
-      if (Index->isTypeDependent() || Index->isValueDependent())
-        ExprBits.TypeDependent = ExprBits.ValueDependent = true;
-      if (Index->isInstantiationDependent())
-        ExprBits.InstantiationDependent = true;
-      // Propagate unexpanded parameter packs.
-      if (Index->containsUnexpandedParameterPack())
-        ExprBits.ContainsUnexpandedParameterPack = true;
-
-      // Copy the index expressions into permanent storage.
-      *Child++ = IndexExprs[IndexIdx++];
-    } else if (this->Designators[I].isArrayRangeDesignator()) {
-      // Compute type- and value-dependence.
-      Expr *Start = IndexExprs[IndexIdx];
-      Expr *End = IndexExprs[IndexIdx + 1];
-      if (Start->isTypeDependent() || Start->isValueDependent() ||
-          End->isTypeDependent() || End->isValueDependent()) {
-        ExprBits.TypeDependent = ExprBits.ValueDependent = true;
-        ExprBits.InstantiationDependent = true;
-      } else if (Start->isInstantiationDependent() ||
-                 End->isInstantiationDependent()) {
-        ExprBits.InstantiationDependent = true;
-      }
-
-      // Propagate unexpanded parameter packs.
-      if (Start->containsUnexpandedParameterPack() ||
-          End->containsUnexpandedParameterPack())
-        ExprBits.ContainsUnexpandedParameterPack = true;
-
-      // Copy the start/end expressions into permanent storage.
-      *Child++ = IndexExprs[IndexIdx++];
-      *Child++ = IndexExprs[IndexIdx++];
-    }
-  }
-
-  assert(IndexIdx == IndexExprs.size() && "Wrong number of index expressions");
-}
-
-DesignatedInitExpr *
-DesignatedInitExpr::Create(const ASTContext &C,
-                           llvm::ArrayRef<Designator> Designators,
-                           ArrayRef<Expr*> IndexExprs,
-                           SourceLocation ColonOrEqualLoc,
-                           bool UsesColonSyntax, Expr *Init) {
-  void *Mem = C.Allocate(totalSizeToAlloc<Stmt *>(IndexExprs.size() + 1),
-                         alignof(DesignatedInitExpr));
-  return new (Mem) DesignatedInitExpr(C, C.VoidTy, Designators,
-                                      ColonOrEqualLoc, UsesColonSyntax,
-                                      IndexExprs, Init);
-}
-
-DesignatedInitExpr *DesignatedInitExpr::CreateEmpty(const ASTContext &C,
-                                                    unsigned NumIndexExprs) {
-  void *Mem = C.Allocate(totalSizeToAlloc<Stmt *>(NumIndexExprs + 1),
-                         alignof(DesignatedInitExpr));
-  return new (Mem) DesignatedInitExpr(NumIndexExprs + 1);
-}
-
-void DesignatedInitExpr::setDesignators(const ASTContext &C,
-                                        const Designator *Desigs,
-                                        unsigned NumDesigs) {
-  Designators = new (C) Designator[NumDesigs];
-  NumDesignators = NumDesigs;
-  for (unsigned I = 0; I != NumDesigs; ++I)
-    Designators[I] = Desigs[I];
-}
-
-SourceRange DesignatedInitExpr::getDesignatorsSourceRange() const {
-  DesignatedInitExpr *DIE = const_cast<DesignatedInitExpr*>(this);
-  if (size() == 1)
-    return DIE->getDesignator(0)->getSourceRange();
-  return SourceRange(DIE->getDesignator(0)->getBeginLoc(),
-                     DIE->getDesignator(size() - 1)->getEndLoc());
-}
-
-SourceLocation DesignatedInitExpr::getBeginLoc() const {
-  SourceLocation StartLoc;
-  auto *DIE = const_cast<DesignatedInitExpr *>(this);
-  Designator &First = *DIE->getDesignator(0);
-  if (First.isFieldDesignator()) {
-    if (GNUSyntax)
-      StartLoc = SourceLocation::getFromRawEncoding(First.Field.FieldLoc);
-    else
-      StartLoc = SourceLocation::getFromRawEncoding(First.Field.DotLoc);
-  } else
-    StartLoc =
-      SourceLocation::getFromRawEncoding(First.ArrayOrRange.LBracketLoc);
-  return StartLoc;
-}
-
-SourceLocation DesignatedInitExpr::getEndLoc() const {
-  return getInit()->getEndLoc();
-}
-
-Expr *DesignatedInitExpr::getArrayIndex(const Designator& D) const {
-  assert(D.Kind == Designator::ArrayDesignator && "Requires array designator");
-  return getSubExpr(D.ArrayOrRange.Index + 1);
-}
-
-Expr *DesignatedInitExpr::getArrayRangeStart(const Designator &D) const {
-  assert(D.Kind == Designator::ArrayRangeDesignator &&
-         "Requires array range designator");
-  return getSubExpr(D.ArrayOrRange.Index + 1);
-}
-
-Expr *DesignatedInitExpr::getArrayRangeEnd(const Designator &D) const {
-  assert(D.Kind == Designator::ArrayRangeDesignator &&
-         "Requires array range designator");
-  return getSubExpr(D.ArrayOrRange.Index + 2);
-}
-
-/// Replaces the designator at index @p Idx with the series
-/// of designators in [First, Last).
-void DesignatedInitExpr::ExpandDesignator(const ASTContext &C, unsigned Idx,
-                                          const Designator *First,
-                                          const Designator *Last) {
-  unsigned NumNewDesignators = Last - First;
-  if (NumNewDesignators == 0) {
-    std::copy_backward(Designators + Idx + 1,
-                       Designators + NumDesignators,
-                       Designators + Idx);
-    --NumNewDesignators;
-    return;
-  } else if (NumNewDesignators == 1) {
-    Designators[Idx] = *First;
-    return;
-  }
-
-  Designator *NewDesignators
-    = new (C) Designator[NumDesignators - 1 + NumNewDesignators];
-  std::copy(Designators, Designators + Idx, NewDesignators);
-  std::copy(First, Last, NewDesignators + Idx);
-  std::copy(Designators + Idx + 1, Designators + NumDesignators,
-            NewDesignators + Idx + NumNewDesignators);
-  Designators = NewDesignators;
-  NumDesignators = NumDesignators - 1 + NumNewDesignators;
-}
-
-DesignatedInitUpdateExpr::DesignatedInitUpdateExpr(const ASTContext &C,
-    SourceLocation lBraceLoc, Expr *baseExpr, SourceLocation rBraceLoc)
-  : Expr(DesignatedInitUpdateExprClass, baseExpr->getType(), VK_RValue,
-         OK_Ordinary, false, false, false, false) {
-  BaseAndUpdaterExprs[0] = baseExpr;
-
-  InitListExpr *ILE = new (C) InitListExpr(C, lBraceLoc, None, rBraceLoc);
-  ILE->setType(baseExpr->getType());
-  BaseAndUpdaterExprs[1] = ILE;
-}
-
-SourceLocation DesignatedInitUpdateExpr::getBeginLoc() const {
-  return getBase()->getBeginLoc();
-}
-
-SourceLocation DesignatedInitUpdateExpr::getEndLoc() const {
-  return getBase()->getEndLoc();
-}
-
-ParenListExpr::ParenListExpr(SourceLocation LParenLoc, ArrayRef<Expr *> Exprs,
-                             SourceLocation RParenLoc)
-    : Expr(ParenListExprClass, QualType(), VK_RValue, OK_Ordinary, false, false,
-           false, false),
-      LParenLoc(LParenLoc), RParenLoc(RParenLoc) {
-  ParenListExprBits.NumExprs = Exprs.size();
-
-  for (unsigned I = 0, N = Exprs.size(); I != N; ++I) {
-    if (Exprs[I]->isTypeDependent())
-      ExprBits.TypeDependent = true;
-    if (Exprs[I]->isValueDependent())
-      ExprBits.ValueDependent = true;
-    if (Exprs[I]->isInstantiationDependent())
-      ExprBits.InstantiationDependent = true;
-    if (Exprs[I]->containsUnexpandedParameterPack())
-      ExprBits.ContainsUnexpandedParameterPack = true;
-
-    getTrailingObjects<Stmt *>()[I] = Exprs[I];
-  }
-}
-
-ParenListExpr::ParenListExpr(EmptyShell Empty, unsigned NumExprs)
-    : Expr(ParenListExprClass, Empty) {
-  ParenListExprBits.NumExprs = NumExprs;
-}
-
-ParenListExpr *ParenListExpr::Create(const ASTContext &Ctx,
-                                     SourceLocation LParenLoc,
-                                     ArrayRef<Expr *> Exprs,
-                                     SourceLocation RParenLoc) {
-  void *Mem = Ctx.Allocate(totalSizeToAlloc<Stmt *>(Exprs.size()),
-                           alignof(ParenListExpr));
-  return new (Mem) ParenListExpr(LParenLoc, Exprs, RParenLoc);
-}
-
-ParenListExpr *ParenListExpr::CreateEmpty(const ASTContext &Ctx,
-                                          unsigned NumExprs) {
-  void *Mem =
-      Ctx.Allocate(totalSizeToAlloc<Stmt *>(NumExprs), alignof(ParenListExpr));
-  return new (Mem) ParenListExpr(EmptyShell(), NumExprs);
-}
-
-const OpaqueValueExpr *OpaqueValueExpr::findInCopyConstruct(const Expr *e) {
-  if (const ExprWithCleanups *ewc = dyn_cast<ExprWithCleanups>(e))
-    e = ewc->getSubExpr();
-  if (const MaterializeTemporaryExpr *m = dyn_cast<MaterializeTemporaryExpr>(e))
-    e = m->GetTemporaryExpr();
-  e = cast<CXXConstructExpr>(e)->getArg(0);
-  while (const ImplicitCastExpr *ice = dyn_cast<ImplicitCastExpr>(e))
-    e = ice->getSubExpr();
-  return cast<OpaqueValueExpr>(e);
-}
-
-PseudoObjectExpr *PseudoObjectExpr::Create(const ASTContext &Context,
-                                           EmptyShell sh,
-                                           unsigned numSemanticExprs) {
-  void *buffer =
-      Context.Allocate(totalSizeToAlloc<Expr *>(1 + numSemanticExprs),
-                       alignof(PseudoObjectExpr));
-  return new(buffer) PseudoObjectExpr(sh, numSemanticExprs);
-}
-
-PseudoObjectExpr::PseudoObjectExpr(EmptyShell shell, unsigned numSemanticExprs)
-  : Expr(PseudoObjectExprClass, shell) {
-  PseudoObjectExprBits.NumSubExprs = numSemanticExprs + 1;
-}
-
-PseudoObjectExpr *PseudoObjectExpr::Create(const ASTContext &C, Expr *syntax,
-                                           ArrayRef<Expr*> semantics,
-                                           unsigned resultIndex) {
-  assert(syntax && "no syntactic expression!");
-  assert(semantics.size() && "no semantic expressions!");
-
-  QualType type;
-  ExprValueKind VK;
-  if (resultIndex == NoResult) {
-    type = C.VoidTy;
-    VK = VK_RValue;
-  } else {
-    assert(resultIndex < semantics.size());
-    type = semantics[resultIndex]->getType();
-    VK = semantics[resultIndex]->getValueKind();
-    assert(semantics[resultIndex]->getObjectKind() == OK_Ordinary);
-  }
-
-  void *buffer = C.Allocate(totalSizeToAlloc<Expr *>(semantics.size() + 1),
-                            alignof(PseudoObjectExpr));
-  return new(buffer) PseudoObjectExpr(type, VK, syntax, semantics,
-                                      resultIndex);
-}
-
-PseudoObjectExpr::PseudoObjectExpr(QualType type, ExprValueKind VK,
-                                   Expr *syntax, ArrayRef<Expr*> semantics,
-                                   unsigned resultIndex)
-  : Expr(PseudoObjectExprClass, type, VK, OK_Ordinary,
-         /*filled in at end of ctor*/ false, false, false, false) {
-  PseudoObjectExprBits.NumSubExprs = semantics.size() + 1;
-  PseudoObjectExprBits.ResultIndex = resultIndex + 1;
-
-  for (unsigned i = 0, e = semantics.size() + 1; i != e; ++i) {
-    Expr *E = (i == 0 ? syntax : semantics[i-1]);
-    getSubExprsBuffer()[i] = E;
-
-    if (E->isTypeDependent())
-      ExprBits.TypeDependent = true;
-    if (E->isValueDependent())
-      ExprBits.ValueDependent = true;
-    if (E->isInstantiationDependent())
-      ExprBits.InstantiationDependent = true;
-    if (E->containsUnexpandedParameterPack())
-      ExprBits.ContainsUnexpandedParameterPack = true;
-
-    if (isa<OpaqueValueExpr>(E))
-      assert(cast<OpaqueValueExpr>(E)->getSourceExpr() != nullptr &&
-             "opaque-value semantic expressions for pseudo-object "
-             "operations must have sources");
-  }
-}
-
-//===----------------------------------------------------------------------===//
-//  Child Iterators for iterating over subexpressions/substatements
-//===----------------------------------------------------------------------===//
-
-// UnaryExprOrTypeTraitExpr
-Stmt::child_range UnaryExprOrTypeTraitExpr::children() {
-  const_child_range CCR =
-      const_cast<const UnaryExprOrTypeTraitExpr *>(this)->children();
-  return child_range(cast_away_const(CCR.begin()), cast_away_const(CCR.end()));
-}
-
-Stmt::const_child_range UnaryExprOrTypeTraitExpr::children() const {
-  // If this is of a type and the type is a VLA type (and not a typedef), the
-  // size expression of the VLA needs to be treated as an executable expression.
-  // Why isn't this weirdness documented better in StmtIterator?
-  if (isArgumentType()) {
-    if (const VariableArrayType *T =
-            dyn_cast<VariableArrayType>(getArgumentType().getTypePtr()))
-      return const_child_range(const_child_iterator(T), const_child_iterator());
-    return const_child_range(const_child_iterator(), const_child_iterator());
-  }
-  return const_child_range(&Argument.Ex, &Argument.Ex + 1);
-}
-
-AtomicExpr::AtomicExpr(SourceLocation BLoc, ArrayRef<Expr*> args,
-                       QualType t, AtomicOp op, SourceLocation RP)
-  : Expr(AtomicExprClass, t, VK_RValue, OK_Ordinary,
-         false, false, false, false),
-    NumSubExprs(args.size()), BuiltinLoc(BLoc), RParenLoc(RP), Op(op)
-{
-  assert(args.size() == getNumSubExprs(op) && "wrong number of subexpressions");
-  for (unsigned i = 0; i != args.size(); i++) {
-    if (args[i]->isTypeDependent())
-      ExprBits.TypeDependent = true;
-    if (args[i]->isValueDependent())
-      ExprBits.ValueDependent = true;
-    if (args[i]->isInstantiationDependent())
-      ExprBits.InstantiationDependent = true;
-    if (args[i]->containsUnexpandedParameterPack())
-      ExprBits.ContainsUnexpandedParameterPack = true;
-
-    SubExprs[i] = args[i];
-  }
-}
-
-unsigned AtomicExpr::getNumSubExprs(AtomicOp Op) {
-  switch (Op) {
-  case AO__c11_atomic_init:
-  case AO__opencl_atomic_init:
-  case AO__c11_atomic_load:
-  case AO__atomic_load_n:
-    return 2;
-
-  case AO__opencl_atomic_load:
-  case AO__c11_atomic_store:
-  case AO__c11_atomic_exchange:
-  case AO__atomic_load:
-  case AO__atomic_store:
-  case AO__atomic_store_n:
-  case AO__atomic_exchange_n:
-  case AO__c11_atomic_fetch_add:
-  case AO__c11_atomic_fetch_sub:
-  case AO__c11_atomic_fetch_and:
-  case AO__c11_atomic_fetch_or:
-  case AO__c11_atomic_fetch_xor:
-  case AO__atomic_fetch_add:
-  case AO__atomic_fetch_sub:
-  case AO__atomic_fetch_and:
-  case AO__atomic_fetch_or:
-  case AO__atomic_fetch_xor:
-  case AO__atomic_fetch_nand:
-  case AO__atomic_add_fetch:
-  case AO__atomic_sub_fetch:
-  case AO__atomic_and_fetch:
-  case AO__atomic_or_fetch:
-  case AO__atomic_xor_fetch:
-  case AO__atomic_nand_fetch:
-  case AO__atomic_fetch_min:
-  case AO__atomic_fetch_max:
-    return 3;
-
-  case AO__opencl_atomic_store:
-  case AO__opencl_atomic_exchange:
-  case AO__opencl_atomic_fetch_add:
-  case AO__opencl_atomic_fetch_sub:
-  case AO__opencl_atomic_fetch_and:
-  case AO__opencl_atomic_fetch_or:
-  case AO__opencl_atomic_fetch_xor:
-  case AO__opencl_atomic_fetch_min:
-  case AO__opencl_atomic_fetch_max:
-  case AO__atomic_exchange:
-    return 4;
-
-  case AO__c11_atomic_compare_exchange_strong:
-  case AO__c11_atomic_compare_exchange_weak:
-    return 5;
-
-  case AO__opencl_atomic_compare_exchange_strong:
-  case AO__opencl_atomic_compare_exchange_weak:
-  case AO__atomic_compare_exchange:
-  case AO__atomic_compare_exchange_n:
-    return 6;
-  }
-  llvm_unreachable("unknown atomic op");
-}
-
-QualType AtomicExpr::getValueType() const {
-  auto T = getPtr()->getType()->castAs<PointerType>()->getPointeeType();
-  if (auto AT = T->getAs<AtomicType>())
-    return AT->getValueType();
-  return T;
-}
-
-QualType OMPArraySectionExpr::getBaseOriginalType(const Expr *Base) {
-  unsigned ArraySectionCount = 0;
-  while (auto *OASE = dyn_cast<OMPArraySectionExpr>(Base->IgnoreParens())) {
-    Base = OASE->getBase();
-    ++ArraySectionCount;
-  }
-  while (auto *ASE =
-             dyn_cast<ArraySubscriptExpr>(Base->IgnoreParenImpCasts())) {
-    Base = ASE->getBase();
-    ++ArraySectionCount;
-  }
-  Base = Base->IgnoreParenImpCasts();
-  auto OriginalTy = Base->getType();
-  if (auto *DRE = dyn_cast<DeclRefExpr>(Base))
-    if (auto *PVD = dyn_cast<ParmVarDecl>(DRE->getDecl()))
-      OriginalTy = PVD->getOriginalType().getNonReferenceType();
-
-  for (unsigned Cnt = 0; Cnt < ArraySectionCount; ++Cnt) {
-    if (OriginalTy->isAnyPointerType())
-      OriginalTy = OriginalTy->getPointeeType();
-    else {
-      assert (OriginalTy->isArrayType());
-      OriginalTy = OriginalTy->castAsArrayTypeUnsafe()->getElementType();
-    }
-  }
-  return OriginalTy;
-}