Remove LLVM 8.0.1 files.

1 files changed, 0 insertions, 2010 deletions

diff --git a/gnu/llvm/tools/clang/lib/Sema/Sema.cpp b/gnu/llvm/tools/clang/lib/Sema/Sema.cpp
deleted file mode 100644
index 9d33ec51909..00000000000
--- a/gnu/llvm/tools/clang/lib/Sema/Sema.cpp
+++ /dev/null
@@ -1,2010 +0,0 @@
-//===--- Sema.cpp - AST Builder and Semantic Analysis 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 actions class which performs semantic analysis and
-// builds an AST out of a parse stream.
-//
-//===----------------------------------------------------------------------===//
-
-#include "clang/AST/ASTContext.h"
-#include "clang/AST/ASTDiagnostic.h"
-#include "clang/AST/DeclCXX.h"
-#include "clang/AST/DeclFriend.h"
-#include "clang/AST/DeclObjC.h"
-#include "clang/AST/Expr.h"
-#include "clang/AST/ExprCXX.h"
-#include "clang/AST/PrettyDeclStackTrace.h"
-#include "clang/AST/StmtCXX.h"
-#include "clang/Basic/DiagnosticOptions.h"
-#include "clang/Basic/PartialDiagnostic.h"
-#include "clang/Basic/TargetInfo.h"
-#include "clang/Lex/HeaderSearch.h"
-#include "clang/Lex/Preprocessor.h"
-#include "clang/Sema/CXXFieldCollector.h"
-#include "clang/Sema/DelayedDiagnostic.h"
-#include "clang/Sema/ExternalSemaSource.h"
-#include "clang/Sema/Initialization.h"
-#include "clang/Sema/MultiplexExternalSemaSource.h"
-#include "clang/Sema/ObjCMethodList.h"
-#include "clang/Sema/Scope.h"
-#include "clang/Sema/ScopeInfo.h"
-#include "clang/Sema/SemaConsumer.h"
-#include "clang/Sema/SemaInternal.h"
-#include "clang/Sema/TemplateDeduction.h"
-#include "clang/Sema/TemplateInstCallback.h"
-#include "llvm/ADT/DenseMap.h"
-#include "llvm/ADT/SmallSet.h"
-using namespace clang;
-using namespace sema;
-
-SourceLocation Sema::getLocForEndOfToken(SourceLocation Loc, unsigned Offset) {
-  return Lexer::getLocForEndOfToken(Loc, Offset, SourceMgr, LangOpts);
-}
-
-ModuleLoader &Sema::getModuleLoader() const { return PP.getModuleLoader(); }
-
-PrintingPolicy Sema::getPrintingPolicy(const ASTContext &Context,
-                                       const Preprocessor &PP) {
-  PrintingPolicy Policy = Context.getPrintingPolicy();
-  // In diagnostics, we print _Bool as bool if the latter is defined as the
-  // former.
-  Policy.Bool = Context.getLangOpts().Bool;
-  if (!Policy.Bool) {
-    if (const MacroInfo *BoolMacro = PP.getMacroInfo(Context.getBoolName())) {
-      Policy.Bool = BoolMacro->isObjectLike() &&
-                    BoolMacro->getNumTokens() == 1 &&
-                    BoolMacro->getReplacementToken(0).is(tok::kw__Bool);
-    }
-  }
-
-  return Policy;
-}
-
-void Sema::ActOnTranslationUnitScope(Scope *S) {
-  TUScope = S;
-  PushDeclContext(S, Context.getTranslationUnitDecl());
-}
-
-namespace clang {
-namespace sema {
-
-class SemaPPCallbacks : public PPCallbacks {
-  Sema *S = nullptr;
-  llvm::SmallVector<SourceLocation, 8> IncludeStack;
-
-public:
-  void set(Sema &S) { this->S = &S; }
-
-  void reset() { S = nullptr; }
-
-  virtual void FileChanged(SourceLocation Loc, FileChangeReason Reason,
-                           SrcMgr::CharacteristicKind FileType,
-                           FileID PrevFID) override {
-    if (!S)
-      return;
-    switch (Reason) {
-    case EnterFile: {
-      SourceManager &SM = S->getSourceManager();
-      SourceLocation IncludeLoc = SM.getIncludeLoc(SM.getFileID(Loc));
-      if (IncludeLoc.isValid()) {
-        IncludeStack.push_back(IncludeLoc);
-        S->DiagnoseNonDefaultPragmaPack(
-            Sema::PragmaPackDiagnoseKind::NonDefaultStateAtInclude, IncludeLoc);
-      }
-      break;
-    }
-    case ExitFile:
-      if (!IncludeStack.empty())
-        S->DiagnoseNonDefaultPragmaPack(
-            Sema::PragmaPackDiagnoseKind::ChangedStateAtExit,
-            IncludeStack.pop_back_val());
-      break;
-    default:
-      break;
-    }
-  }
-};
-
-} // end namespace sema
-} // end namespace clang
-
-Sema::Sema(Preprocessor &pp, ASTContext &ctxt, ASTConsumer &consumer,
-           TranslationUnitKind TUKind, CodeCompleteConsumer *CodeCompleter)
-    : ExternalSource(nullptr), isMultiplexExternalSource(false),
-      FPFeatures(pp.getLangOpts()), LangOpts(pp.getLangOpts()), PP(pp),
-      Context(ctxt), Consumer(consumer), Diags(PP.getDiagnostics()),
-      SourceMgr(PP.getSourceManager()), CollectStats(false),
-      CodeCompleter(CodeCompleter), CurContext(nullptr),
-      OriginalLexicalContext(nullptr), MSStructPragmaOn(false),
-      MSPointerToMemberRepresentationMethod(
-          LangOpts.getMSPointerToMemberRepresentationMethod()),
-      VtorDispStack(MSVtorDispAttr::Mode(LangOpts.VtorDispMode)), PackStack(0),
-      DataSegStack(nullptr), BSSSegStack(nullptr), ConstSegStack(nullptr),
-      CodeSegStack(nullptr), CurInitSeg(nullptr), VisContext(nullptr),
-      PragmaAttributeCurrentTargetDecl(nullptr),
-      IsBuildingRecoveryCallExpr(false), Cleanup{}, LateTemplateParser(nullptr),
-      LateTemplateParserCleanup(nullptr), OpaqueParser(nullptr), IdResolver(pp),
-      StdExperimentalNamespaceCache(nullptr), StdInitializerList(nullptr),
-      StdCoroutineTraitsCache(nullptr), CXXTypeInfoDecl(nullptr),
-      MSVCGuidDecl(nullptr), NSNumberDecl(nullptr), NSValueDecl(nullptr),
-      NSStringDecl(nullptr), StringWithUTF8StringMethod(nullptr),
-      ValueWithBytesObjCTypeMethod(nullptr), NSArrayDecl(nullptr),
-      ArrayWithObjectsMethod(nullptr), NSDictionaryDecl(nullptr),
-      DictionaryWithObjectsMethod(nullptr), GlobalNewDeleteDeclared(false),
-      TUKind(TUKind), NumSFINAEErrors(0),
-      FullyCheckedComparisonCategories(
-          static_cast<unsigned>(ComparisonCategoryType::Last) + 1),
-      AccessCheckingSFINAE(false), InNonInstantiationSFINAEContext(false),
-      NonInstantiationEntries(0), ArgumentPackSubstitutionIndex(-1),
-      CurrentInstantiationScope(nullptr), DisableTypoCorrection(false),
-      TyposCorrected(0), AnalysisWarnings(*this),
-      ThreadSafetyDeclCache(nullptr), VarDataSharingAttributesStack(nullptr),
-      CurScope(nullptr), Ident_super(nullptr), Ident___float128(nullptr) {
-  TUScope = nullptr;
-
-  LoadedExternalKnownNamespaces = false;
-  for (unsigned I = 0; I != NSAPI::NumNSNumberLiteralMethods; ++I)
-    NSNumberLiteralMethods[I] = nullptr;
-
-  if (getLangOpts().ObjC)
-    NSAPIObj.reset(new NSAPI(Context));
-
-  if (getLangOpts().CPlusPlus)
-    FieldCollector.reset(new CXXFieldCollector());
-
-  // Tell diagnostics how to render things from the AST library.
-  Diags.SetArgToStringFn(&FormatASTNodeDiagnosticArgument, &Context);
-
-  ExprEvalContexts.emplace_back(
-      ExpressionEvaluationContext::PotentiallyEvaluated, 0, CleanupInfo{},
-      nullptr, ExpressionEvaluationContextRecord::EK_Other);
-
-  PreallocatedFunctionScope.reset(new FunctionScopeInfo(Diags));
-
-  // Initialization of data sharing attributes stack for OpenMP
-  InitDataSharingAttributesStack();
-
-  std::unique_ptr<sema::SemaPPCallbacks> Callbacks =
-      llvm::make_unique<sema::SemaPPCallbacks>();
-  SemaPPCallbackHandler = Callbacks.get();
-  PP.addPPCallbacks(std::move(Callbacks));
-  SemaPPCallbackHandler->set(*this);
-}
-
-void Sema::addImplicitTypedef(StringRef Name, QualType T) {
-  DeclarationName DN = &Context.Idents.get(Name);
-  if (IdResolver.begin(DN) == IdResolver.end())
-    PushOnScopeChains(Context.buildImplicitTypedef(T, Name), TUScope);
-}
-
-void Sema::Initialize() {
-  if (SemaConsumer *SC = dyn_cast<SemaConsumer>(&Consumer))
-    SC->InitializeSema(*this);
-
-  // Tell the external Sema source about this Sema object.
-  if (ExternalSemaSource *ExternalSema
-      = dyn_cast_or_null<ExternalSemaSource>(Context.getExternalSource()))
-    ExternalSema->InitializeSema(*this);
-
-  // This needs to happen after ExternalSemaSource::InitializeSema(this) or we
-  // will not be able to merge any duplicate __va_list_tag decls correctly.
-  VAListTagName = PP.getIdentifierInfo("__va_list_tag");
-
-  if (!TUScope)
-    return;
-
-  // Initialize predefined 128-bit integer types, if needed.
-  if (Context.getTargetInfo().hasInt128Type()) {
-    // If either of the 128-bit integer types are unavailable to name lookup,
-    // define them now.
-    DeclarationName Int128 = &Context.Idents.get("__int128_t");
-    if (IdResolver.begin(Int128) == IdResolver.end())
-      PushOnScopeChains(Context.getInt128Decl(), TUScope);
-
-    DeclarationName UInt128 = &Context.Idents.get("__uint128_t");
-    if (IdResolver.begin(UInt128) == IdResolver.end())
-      PushOnScopeChains(Context.getUInt128Decl(), TUScope);
-  }
-
-
-  // Initialize predefined Objective-C types:
-  if (getLangOpts().ObjC) {
-    // If 'SEL' does not yet refer to any declarations, make it refer to the
-    // predefined 'SEL'.
-    DeclarationName SEL = &Context.Idents.get("SEL");
-    if (IdResolver.begin(SEL) == IdResolver.end())
-      PushOnScopeChains(Context.getObjCSelDecl(), TUScope);
-
-    // If 'id' does not yet refer to any declarations, make it refer to the
-    // predefined 'id'.
-    DeclarationName Id = &Context.Idents.get("id");
-    if (IdResolver.begin(Id) == IdResolver.end())
-      PushOnScopeChains(Context.getObjCIdDecl(), TUScope);
-
-    // Create the built-in typedef for 'Class'.
-    DeclarationName Class = &Context.Idents.get("Class");
-    if (IdResolver.begin(Class) == IdResolver.end())
-      PushOnScopeChains(Context.getObjCClassDecl(), TUScope);
-
-    // Create the built-in forward declaratino for 'Protocol'.
-    DeclarationName Protocol = &Context.Idents.get("Protocol");
-    if (IdResolver.begin(Protocol) == IdResolver.end())
-      PushOnScopeChains(Context.getObjCProtocolDecl(), TUScope);
-  }
-
-  // Create the internal type for the *StringMakeConstantString builtins.
-  DeclarationName ConstantString = &Context.Idents.get("__NSConstantString");
-  if (IdResolver.begin(ConstantString) == IdResolver.end())
-    PushOnScopeChains(Context.getCFConstantStringDecl(), TUScope);
-
-  // Initialize Microsoft "predefined C++ types".
-  if (getLangOpts().MSVCCompat) {
-    if (getLangOpts().CPlusPlus &&
-        IdResolver.begin(&Context.Idents.get("type_info")) == IdResolver.end())
-      PushOnScopeChains(Context.buildImplicitRecord("type_info", TTK_Class),
-                        TUScope);
-
-    addImplicitTypedef("size_t", Context.getSizeType());
-  }
-
-  // Initialize predefined OpenCL types and supported extensions and (optional)
-  // core features.
-  if (getLangOpts().OpenCL) {
-    getOpenCLOptions().addSupport(
-        Context.getTargetInfo().getSupportedOpenCLOpts());
-    getOpenCLOptions().enableSupportedCore(getLangOpts());
-    addImplicitTypedef("sampler_t", Context.OCLSamplerTy);
-    addImplicitTypedef("event_t", Context.OCLEventTy);
-    if (getLangOpts().OpenCLCPlusPlus || getLangOpts().OpenCLVersion >= 200) {
-      addImplicitTypedef("clk_event_t", Context.OCLClkEventTy);
-      addImplicitTypedef("queue_t", Context.OCLQueueTy);
-      addImplicitTypedef("reserve_id_t", Context.OCLReserveIDTy);
-      addImplicitTypedef("atomic_int", Context.getAtomicType(Context.IntTy));
-      addImplicitTypedef("atomic_uint",
-                         Context.getAtomicType(Context.UnsignedIntTy));
-      auto AtomicLongT = Context.getAtomicType(Context.LongTy);
-      addImplicitTypedef("atomic_long", AtomicLongT);
-      auto AtomicULongT = Context.getAtomicType(Context.UnsignedLongTy);
-      addImplicitTypedef("atomic_ulong", AtomicULongT);
-      addImplicitTypedef("atomic_float",
-                         Context.getAtomicType(Context.FloatTy));
-      auto AtomicDoubleT = Context.getAtomicType(Context.DoubleTy);
-      addImplicitTypedef("atomic_double", AtomicDoubleT);
-      // OpenCLC v2.0, s6.13.11.6 requires that atomic_flag is implemented as
-      // 32-bit integer and OpenCLC v2.0, s6.1.1 int is always 32-bit wide.
-      addImplicitTypedef("atomic_flag", Context.getAtomicType(Context.IntTy));
-      auto AtomicIntPtrT = Context.getAtomicType(Context.getIntPtrType());
-      addImplicitTypedef("atomic_intptr_t", AtomicIntPtrT);
-      auto AtomicUIntPtrT = Context.getAtomicType(Context.getUIntPtrType());
-      addImplicitTypedef("atomic_uintptr_t", AtomicUIntPtrT);
-      auto AtomicSizeT = Context.getAtomicType(Context.getSizeType());
-      addImplicitTypedef("atomic_size_t", AtomicSizeT);
-      auto AtomicPtrDiffT = Context.getAtomicType(Context.getPointerDiffType());
-      addImplicitTypedef("atomic_ptrdiff_t", AtomicPtrDiffT);
-
-      // OpenCL v2.0 s6.13.11.6:
-      // - The atomic_long and atomic_ulong types are supported if the
-      //   cl_khr_int64_base_atomics and cl_khr_int64_extended_atomics
-      //   extensions are supported.
-      // - The atomic_double type is only supported if double precision
-      //   is supported and the cl_khr_int64_base_atomics and
-      //   cl_khr_int64_extended_atomics extensions are supported.
-      // - If the device address space is 64-bits, the data types
-      //   atomic_intptr_t, atomic_uintptr_t, atomic_size_t and
-      //   atomic_ptrdiff_t are supported if the cl_khr_int64_base_atomics and
-      //   cl_khr_int64_extended_atomics extensions are supported.
-      std::vector<QualType> Atomic64BitTypes;
-      Atomic64BitTypes.push_back(AtomicLongT);
-      Atomic64BitTypes.push_back(AtomicULongT);
-      Atomic64BitTypes.push_back(AtomicDoubleT);
-      if (Context.getTypeSize(AtomicSizeT) == 64) {
-        Atomic64BitTypes.push_back(AtomicSizeT);
-        Atomic64BitTypes.push_back(AtomicIntPtrT);
-        Atomic64BitTypes.push_back(AtomicUIntPtrT);
-        Atomic64BitTypes.push_back(AtomicPtrDiffT);
-      }
-      for (auto &I : Atomic64BitTypes)
-        setOpenCLExtensionForType(I,
-            "cl_khr_int64_base_atomics cl_khr_int64_extended_atomics");
-
-      setOpenCLExtensionForType(AtomicDoubleT, "cl_khr_fp64");
-    }
-
-    setOpenCLExtensionForType(Context.DoubleTy, "cl_khr_fp64");
-
-#define GENERIC_IMAGE_TYPE_EXT(Type, Id, Ext) \
-    setOpenCLExtensionForType(Context.Id, Ext);
-#include "clang/Basic/OpenCLImageTypes.def"
-#define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \
-    addImplicitTypedef(#ExtType, Context.Id##Ty); \
-    setOpenCLExtensionForType(Context.Id##Ty, #Ext);
-#include "clang/Basic/OpenCLExtensionTypes.def"
-    };
-
-  if (Context.getTargetInfo().hasBuiltinMSVaList()) {
-    DeclarationName MSVaList = &Context.Idents.get("__builtin_ms_va_list");
-    if (IdResolver.begin(MSVaList) == IdResolver.end())
-      PushOnScopeChains(Context.getBuiltinMSVaListDecl(), TUScope);
-  }
-
-  DeclarationName BuiltinVaList = &Context.Idents.get("__builtin_va_list");
-  if (IdResolver.begin(BuiltinVaList) == IdResolver.end())
-    PushOnScopeChains(Context.getBuiltinVaListDecl(), TUScope);
-}
-
-Sema::~Sema() {
-  if (VisContext) FreeVisContext();
-
-  // Kill all the active scopes.
-  for (sema::FunctionScopeInfo *FSI : FunctionScopes)
-    if (FSI != PreallocatedFunctionScope.get())
-      delete FSI;
-
-  // Tell the SemaConsumer to forget about us; we're going out of scope.
-  if (SemaConsumer *SC = dyn_cast<SemaConsumer>(&Consumer))
-    SC->ForgetSema();
-
-  // Detach from the external Sema source.
-  if (ExternalSemaSource *ExternalSema
-        = dyn_cast_or_null<ExternalSemaSource>(Context.getExternalSource()))
-    ExternalSema->ForgetSema();
-
-  // If Sema's ExternalSource is the multiplexer - we own it.
-  if (isMultiplexExternalSource)
-    delete ExternalSource;
-
-  threadSafety::threadSafetyCleanup(ThreadSafetyDeclCache);
-
-  // Destroys data sharing attributes stack for OpenMP
-  DestroyDataSharingAttributesStack();
-
-  // Detach from the PP callback handler which outlives Sema since it's owned
-  // by the preprocessor.
-  SemaPPCallbackHandler->reset();
-
-  assert(DelayedTypos.empty() && "Uncorrected typos!");
-}
-
-/// makeUnavailableInSystemHeader - There is an error in the current
-/// context.  If we're still in a system header, and we can plausibly
-/// make the relevant declaration unavailable instead of erroring, do
-/// so and return true.
-bool Sema::makeUnavailableInSystemHeader(SourceLocation loc,
-                                      UnavailableAttr::ImplicitReason reason) {
-  // If we're not in a function, it's an error.
-  FunctionDecl *fn = dyn_cast<FunctionDecl>(CurContext);
-  if (!fn) return false;
-
-  // If we're in template instantiation, it's an error.
-  if (inTemplateInstantiation())
-    return false;
-
-  // If that function's not in a system header, it's an error.
-  if (!Context.getSourceManager().isInSystemHeader(loc))
-    return false;
-
-  // If the function is already unavailable, it's not an error.
-  if (fn->hasAttr<UnavailableAttr>()) return true;
-
-  fn->addAttr(UnavailableAttr::CreateImplicit(Context, "", reason, loc));
-  return true;
-}
-
-ASTMutationListener *Sema::getASTMutationListener() const {
-  return getASTConsumer().GetASTMutationListener();
-}
-
-///Registers an external source. If an external source already exists,
-/// creates a multiplex external source and appends to it.
-///
-///\param[in] E - A non-null external sema source.
-///
-void Sema::addExternalSource(ExternalSemaSource *E) {
-  assert(E && "Cannot use with NULL ptr");
-
-  if (!ExternalSource) {
-    ExternalSource = E;
-    return;
-  }
-
-  if (isMultiplexExternalSource)
-    static_cast<MultiplexExternalSemaSource*>(ExternalSource)->addSource(*E);
-  else {
-    ExternalSource = new MultiplexExternalSemaSource(*ExternalSource, *E);
-    isMultiplexExternalSource = true;
-  }
-}
-
-/// Print out statistics about the semantic analysis.
-void Sema::PrintStats() const {
-  llvm::errs() << "\n*** Semantic Analysis Stats:\n";
-  llvm::errs() << NumSFINAEErrors << " SFINAE diagnostics trapped.\n";
-
-  BumpAlloc.PrintStats();
-  AnalysisWarnings.PrintStats();
-}
-
-void Sema::diagnoseNullableToNonnullConversion(QualType DstType,
-                                               QualType SrcType,
-                                               SourceLocation Loc) {
-  Optional<NullabilityKind> ExprNullability = SrcType->getNullability(Context);
-  if (!ExprNullability || *ExprNullability != NullabilityKind::Nullable)
-    return;
-
-  Optional<NullabilityKind> TypeNullability = DstType->getNullability(Context);
-  if (!TypeNullability || *TypeNullability != NullabilityKind::NonNull)
-    return;
-
-  Diag(Loc, diag::warn_nullability_lost) << SrcType << DstType;
-}
-
-void Sema::diagnoseZeroToNullptrConversion(CastKind Kind, const Expr* E) {
-  if (Diags.isIgnored(diag::warn_zero_as_null_pointer_constant,
-                      E->getBeginLoc()))
-    return;
-  // nullptr only exists from C++11 on, so don't warn on its absence earlier.
-  if (!getLangOpts().CPlusPlus11)
-    return;
-
-  if (Kind != CK_NullToPointer && Kind != CK_NullToMemberPointer)
-    return;
-  if (E->IgnoreParenImpCasts()->getType()->isNullPtrType())
-    return;
-
-  // If it is a macro from system header, and if the macro name is not "NULL",
-  // do not warn.
-  SourceLocation MaybeMacroLoc = E->getBeginLoc();
-  if (Diags.getSuppressSystemWarnings() &&
-      SourceMgr.isInSystemMacro(MaybeMacroLoc) &&
-      !findMacroSpelling(MaybeMacroLoc, "NULL"))
-    return;
-
-  Diag(E->getBeginLoc(), diag::warn_zero_as_null_pointer_constant)
-      << FixItHint::CreateReplacement(E->getSourceRange(), "nullptr");
-}
-
-/// ImpCastExprToType - If Expr is not of type 'Type', insert an implicit cast.
-/// If there is already an implicit cast, merge into the existing one.
-/// The result is of the given category.
-ExprResult Sema::ImpCastExprToType(Expr *E, QualType Ty,
-                                   CastKind Kind, ExprValueKind VK,
-                                   const CXXCastPath *BasePath,
-                                   CheckedConversionKind CCK) {
-#ifndef NDEBUG
-  if (VK == VK_RValue && !E->isRValue()) {
-    switch (Kind) {
-    default:
-      llvm_unreachable("can't implicitly cast lvalue to rvalue with this cast "
-                       "kind");
-    case CK_LValueToRValue:
-    case CK_ArrayToPointerDecay:
-    case CK_FunctionToPointerDecay:
-    case CK_ToVoid:
-    case CK_NonAtomicToAtomic:
-      break;
-    }
-  }
-  assert((VK == VK_RValue || !E->isRValue()) && "can't cast rvalue to lvalue");
-#endif
-
-  diagnoseNullableToNonnullConversion(Ty, E->getType(), E->getBeginLoc());
-  diagnoseZeroToNullptrConversion(Kind, E);
-
-  QualType ExprTy = Context.getCanonicalType(E->getType());
-  QualType TypeTy = Context.getCanonicalType(Ty);
-
-  if (ExprTy == TypeTy)
-    return E;
-
-  // C++1z [conv.array]: The temporary materialization conversion is applied.
-  // We also use this to fuel C++ DR1213, which applies to C++11 onwards.
-  if (Kind == CK_ArrayToPointerDecay && getLangOpts().CPlusPlus &&
-      E->getValueKind() == VK_RValue) {
-    // The temporary is an lvalue in C++98 and an xvalue otherwise.
-    ExprResult Materialized = CreateMaterializeTemporaryExpr(
-        E->getType(), E, !getLangOpts().CPlusPlus11);
-    if (Materialized.isInvalid())
-      return ExprError();
-    E = Materialized.get();
-  }
-
-  if (ImplicitCastExpr *ImpCast = dyn_cast<ImplicitCastExpr>(E)) {
-    if (ImpCast->getCastKind() == Kind && (!BasePath || BasePath->empty())) {
-      ImpCast->setType(Ty);
-      ImpCast->setValueKind(VK);
-      return E;
-    }
-  }
-
-  return ImplicitCastExpr::Create(Context, Ty, Kind, E, BasePath, VK);
-}
-
-/// ScalarTypeToBooleanCastKind - Returns the cast kind corresponding
-/// to the conversion from scalar type ScalarTy to the Boolean type.
-CastKind Sema::ScalarTypeToBooleanCastKind(QualType ScalarTy) {
-  switch (ScalarTy->getScalarTypeKind()) {
-  case Type::STK_Bool: return CK_NoOp;
-  case Type::STK_CPointer: return CK_PointerToBoolean;
-  case Type::STK_BlockPointer: return CK_PointerToBoolean;
-  case Type::STK_ObjCObjectPointer: return CK_PointerToBoolean;
-  case Type::STK_MemberPointer: return CK_MemberPointerToBoolean;
-  case Type::STK_Integral: return CK_IntegralToBoolean;
-  case Type::STK_Floating: return CK_FloatingToBoolean;
-  case Type::STK_IntegralComplex: return CK_IntegralComplexToBoolean;
-  case Type::STK_FloatingComplex: return CK_FloatingComplexToBoolean;
-  case Type::STK_FixedPoint: return CK_FixedPointToBoolean;
-  }
-  llvm_unreachable("unknown scalar type kind");
-}
-
-/// Used to prune the decls of Sema's UnusedFileScopedDecls vector.
-static bool ShouldRemoveFromUnused(Sema *SemaRef, const DeclaratorDecl *D) {
-  if (D->getMostRecentDecl()->isUsed())
-    return true;
-
-  if (D->isExternallyVisible())
-    return true;
-
-  if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
-    // If this is a function template and none of its specializations is used,
-    // we should warn.
-    if (FunctionTemplateDecl *Template = FD->getDescribedFunctionTemplate())
-      for (const auto *Spec : Template->specializations())
-        if (ShouldRemoveFromUnused(SemaRef, Spec))
-          return true;
-
-    // UnusedFileScopedDecls stores the first declaration.
-    // The declaration may have become definition so check again.
-    const FunctionDecl *DeclToCheck;
-    if (FD->hasBody(DeclToCheck))
-      return !SemaRef->ShouldWarnIfUnusedFileScopedDecl(DeclToCheck);
-
-    // Later redecls may add new information resulting in not having to warn,
-    // so check again.
-    DeclToCheck = FD->getMostRecentDecl();
-    if (DeclToCheck != FD)
-      return !SemaRef->ShouldWarnIfUnusedFileScopedDecl(DeclToCheck);
-  }
-
-  if (const VarDecl *VD = dyn_cast<VarDecl>(D)) {
-    // If a variable usable in constant expressions is referenced,
-    // don't warn if it isn't used: if the value of a variable is required
-    // for the computation of a constant expression, it doesn't make sense to
-    // warn even if the variable isn't odr-used.  (isReferenced doesn't
-    // precisely reflect that, but it's a decent approximation.)
-    if (VD->isReferenced() &&
-        VD->isUsableInConstantExpressions(SemaRef->Context))
-      return true;
-
-    if (VarTemplateDecl *Template = VD->getDescribedVarTemplate())
-      // If this is a variable template and none of its specializations is used,
-      // we should warn.
-      for (const auto *Spec : Template->specializations())
-        if (ShouldRemoveFromUnused(SemaRef, Spec))
-          return true;
-
-    // UnusedFileScopedDecls stores the first declaration.
-    // The declaration may have become definition so check again.
-    const VarDecl *DeclToCheck = VD->getDefinition();
-    if (DeclToCheck)
-      return !SemaRef->ShouldWarnIfUnusedFileScopedDecl(DeclToCheck);
-
-    // Later redecls may add new information resulting in not having to warn,
-    // so check again.
-    DeclToCheck = VD->getMostRecentDecl();
-    if (DeclToCheck != VD)
-      return !SemaRef->ShouldWarnIfUnusedFileScopedDecl(DeclToCheck);
-  }
-
-  return false;
-}
-
-static bool isFunctionOrVarDeclExternC(NamedDecl *ND) {
-  if (auto *FD = dyn_cast<FunctionDecl>(ND))
-    return FD->isExternC();
-  return cast<VarDecl>(ND)->isExternC();
-}
-
-/// Determine whether ND is an external-linkage function or variable whose
-/// type has no linkage.
-bool Sema::isExternalWithNoLinkageType(ValueDecl *VD) {
-  // Note: it's not quite enough to check whether VD has UniqueExternalLinkage,
-  // because we also want to catch the case where its type has VisibleNoLinkage,
-  // which does not affect the linkage of VD.
-  return getLangOpts().CPlusPlus && VD->hasExternalFormalLinkage() &&
-         !isExternalFormalLinkage(VD->getType()->getLinkage()) &&
-         !isFunctionOrVarDeclExternC(VD);
-}
-
-/// Obtains a sorted list of functions and variables that are undefined but
-/// ODR-used.
-void Sema::getUndefinedButUsed(
-    SmallVectorImpl<std::pair<NamedDecl *, SourceLocation> > &Undefined) {
-  for (const auto &UndefinedUse : UndefinedButUsed) {
-    NamedDecl *ND = UndefinedUse.first;
-
-    // Ignore attributes that have become invalid.
-    if (ND->isInvalidDecl()) continue;
-
-    // __attribute__((weakref)) is basically a definition.
-    if (ND->hasAttr<WeakRefAttr>()) continue;
-
-    if (isa<CXXDeductionGuideDecl>(ND))
-      continue;
-
-    if (ND->hasAttr<DLLImportAttr>() || ND->hasAttr<DLLExportAttr>()) {
-      // An exported function will always be emitted when defined, so even if
-      // the function is inline, it doesn't have to be emitted in this TU. An
-      // imported function implies that it has been exported somewhere else.
-      continue;
-    }
-
-    if (FunctionDecl *FD = dyn_cast<FunctionDecl>(ND)) {
-      if (FD->isDefined())
-        continue;
-      if (FD->isExternallyVisible() &&
-          !isExternalWithNoLinkageType(FD) &&
-          !FD->getMostRecentDecl()->isInlined() &&
-          !FD->hasAttr<ExcludeFromExplicitInstantiationAttr>())
-        continue;
-      if (FD->getBuiltinID())
-        continue;
-    } else {
-      auto *VD = cast<VarDecl>(ND);
-      if (VD->hasDefinition() != VarDecl::DeclarationOnly)
-        continue;
-      if (VD->isExternallyVisible() &&
-          !isExternalWithNoLinkageType(VD) &&
-          !VD->getMostRecentDecl()->isInline() &&
-          !VD->hasAttr<ExcludeFromExplicitInstantiationAttr>())
-        continue;
-
-      // Skip VarDecls that lack formal definitions but which we know are in
-      // fact defined somewhere.
-      if (VD->isKnownToBeDefined())
-        continue;
-    }
-
-    Undefined.push_back(std::make_pair(ND, UndefinedUse.second));
-  }
-}
-
-/// checkUndefinedButUsed - Check for undefined objects with internal linkage
-/// or that are inline.
-static void checkUndefinedButUsed(Sema &S) {
-  if (S.UndefinedButUsed.empty()) return;
-
-  // Collect all the still-undefined entities with internal linkage.
-  SmallVector<std::pair<NamedDecl *, SourceLocation>, 16> Undefined;
-  S.getUndefinedButUsed(Undefined);
-  if (Undefined.empty()) return;
-
-  for (auto Undef : Undefined) {
-    ValueDecl *VD = cast<ValueDecl>(Undef.first);
-    SourceLocation UseLoc = Undef.second;
-
-    if (S.isExternalWithNoLinkageType(VD)) {
-      // C++ [basic.link]p8:
-      //   A type without linkage shall not be used as the type of a variable
-      //   or function with external linkage unless
-      //    -- the entity has C language linkage
-      //    -- the entity is not odr-used or is defined in the same TU
-      //
-      // As an extension, accept this in cases where the type is externally
-      // visible, since the function or variable actually can be defined in
-      // another translation unit in that case.
-      S.Diag(VD->getLocation(), isExternallyVisible(VD->getType()->getLinkage())
-                                    ? diag::ext_undefined_internal_type
-                                    : diag::err_undefined_internal_type)
-        << isa<VarDecl>(VD) << VD;
-    } else if (!VD->isExternallyVisible()) {
-      // FIXME: We can promote this to an error. The function or variable can't
-      // be defined anywhere else, so the program must necessarily violate the
-      // one definition rule.
-      S.Diag(VD->getLocation(), diag::warn_undefined_internal)
-        << isa<VarDecl>(VD) << VD;
-    } else if (auto *FD = dyn_cast<FunctionDecl>(VD)) {
-      (void)FD;
-      assert(FD->getMostRecentDecl()->isInlined() &&
-             "used object requires definition but isn't inline or internal?");
-      // FIXME: This is ill-formed; we should reject.
-      S.Diag(VD->getLocation(), diag::warn_undefined_inline) << VD;
-    } else {
-      assert(cast<VarDecl>(VD)->getMostRecentDecl()->isInline() &&
-             "used var requires definition but isn't inline or internal?");
-      S.Diag(VD->getLocation(), diag::err_undefined_inline_var) << VD;
-    }
-    if (UseLoc.isValid())
-      S.Diag(UseLoc, diag::note_used_here);
-  }
-
-  S.UndefinedButUsed.clear();
-}
-
-void Sema::LoadExternalWeakUndeclaredIdentifiers() {
-  if (!ExternalSource)
-    return;
-
-  SmallVector<std::pair<IdentifierInfo *, WeakInfo>, 4> WeakIDs;
-  ExternalSource->ReadWeakUndeclaredIdentifiers(WeakIDs);
-  for (auto &WeakID : WeakIDs)
-    WeakUndeclaredIdentifiers.insert(WeakID);
-}
-
-
-typedef llvm::DenseMap<const CXXRecordDecl*, bool> RecordCompleteMap;
-
-/// Returns true, if all methods and nested classes of the given
-/// CXXRecordDecl are defined in this translation unit.
-///
-/// Should only be called from ActOnEndOfTranslationUnit so that all
-/// definitions are actually read.
-static bool MethodsAndNestedClassesComplete(const CXXRecordDecl *RD,
-                                            RecordCompleteMap &MNCComplete) {
-  RecordCompleteMap::iterator Cache = MNCComplete.find(RD);
-  if (Cache != MNCComplete.end())
-    return Cache->second;
-  if (!RD->isCompleteDefinition())
-    return false;
-  bool Complete = true;
-  for (DeclContext::decl_iterator I = RD->decls_begin(),
-                                  E = RD->decls_end();
-       I != E && Complete; ++I) {
-    if (const CXXMethodDecl *M = dyn_cast<CXXMethodDecl>(*I))
-      Complete = M->isDefined() || M->isDefaulted() ||
-                 (M->isPure() && !isa<CXXDestructorDecl>(M));
-    else if (const FunctionTemplateDecl *F = dyn_cast<FunctionTemplateDecl>(*I))
-      // If the template function is marked as late template parsed at this
-      // point, it has not been instantiated and therefore we have not
-      // performed semantic analysis on it yet, so we cannot know if the type
-      // can be considered complete.
-      Complete = !F->getTemplatedDecl()->isLateTemplateParsed() &&
-                  F->getTemplatedDecl()->isDefined();
-    else if (const CXXRecordDecl *R = dyn_cast<CXXRecordDecl>(*I)) {
-      if (R->isInjectedClassName())
-        continue;
-      if (R->hasDefinition())
-        Complete = MethodsAndNestedClassesComplete(R->getDefinition(),
-                                                   MNCComplete);
-      else
-        Complete = false;
-    }
-  }
-  MNCComplete[RD] = Complete;
-  return Complete;
-}
-
-/// Returns true, if the given CXXRecordDecl is fully defined in this
-/// translation unit, i.e. all methods are defined or pure virtual and all
-/// friends, friend functions and nested classes are fully defined in this
-/// translation unit.
-///
-/// Should only be called from ActOnEndOfTranslationUnit so that all
-/// definitions are actually read.
-static bool IsRecordFullyDefined(const CXXRecordDecl *RD,
-                                 RecordCompleteMap &RecordsComplete,
-                                 RecordCompleteMap &MNCComplete) {
-  RecordCompleteMap::iterator Cache = RecordsComplete.find(RD);
-  if (Cache != RecordsComplete.end())
-    return Cache->second;
-  bool Complete = MethodsAndNestedClassesComplete(RD, MNCComplete);
-  for (CXXRecordDecl::friend_iterator I = RD->friend_begin(),
-                                      E = RD->friend_end();
-       I != E && Complete; ++I) {
-    // Check if friend classes and methods are complete.
-    if (TypeSourceInfo *TSI = (*I)->getFriendType()) {
-      // Friend classes are available as the TypeSourceInfo of the FriendDecl.
-      if (CXXRecordDecl *FriendD = TSI->getType()->getAsCXXRecordDecl())
-        Complete = MethodsAndNestedClassesComplete(FriendD, MNCComplete);
-      else
-        Complete = false;
-    } else {
-      // Friend functions are available through the NamedDecl of FriendDecl.
-      if (const FunctionDecl *FD =
-          dyn_cast<FunctionDecl>((*I)->getFriendDecl()))
-        Complete = FD->isDefined();
-      else
-        // This is a template friend, give up.
-        Complete = false;
-    }
-  }
-  RecordsComplete[RD] = Complete;
-  return Complete;
-}
-
-void Sema::emitAndClearUnusedLocalTypedefWarnings() {
-  if (ExternalSource)
-    ExternalSource->ReadUnusedLocalTypedefNameCandidates(
-        UnusedLocalTypedefNameCandidates);
-  for (const TypedefNameDecl *TD : UnusedLocalTypedefNameCandidates) {
-    if (TD->isReferenced())
-      continue;
-    Diag(TD->getLocation(), diag::warn_unused_local_typedef)
-        << isa<TypeAliasDecl>(TD) << TD->getDeclName();
-  }
-  UnusedLocalTypedefNameCandidates.clear();
-}
-
-/// This is called before the very first declaration in the translation unit
-/// is parsed. Note that the ASTContext may have already injected some
-/// declarations.
-void Sema::ActOnStartOfTranslationUnit() {
-  if (getLangOpts().ModulesTS &&
-      (getLangOpts().getCompilingModule() == LangOptions::CMK_ModuleInterface ||
-       getLangOpts().getCompilingModule() == LangOptions::CMK_None)) {
-    SourceLocation StartOfTU =
-        SourceMgr.getLocForStartOfFile(SourceMgr.getMainFileID());
-
-    // We start in the global module; all those declarations are implicitly
-    // module-private (though they do not have module linkage).
-    auto &Map = PP.getHeaderSearchInfo().getModuleMap();
-    auto *GlobalModule = Map.createGlobalModuleForInterfaceUnit(StartOfTU);
-    assert(GlobalModule && "module creation should not fail");
-
-    // Enter the scope of the global module.
-    ModuleScopes.push_back({});
-    ModuleScopes.back().Module = GlobalModule;
-    VisibleModules.setVisible(GlobalModule, StartOfTU);
-
-    // All declarations created from now on are owned by the global module.
-    auto *TU = Context.getTranslationUnitDecl();
-    TU->setModuleOwnershipKind(Decl::ModuleOwnershipKind::Visible);
-    TU->setLocalOwningModule(GlobalModule);
-  }
-}
-
-/// ActOnEndOfTranslationUnit - This is called at the very end of the
-/// translation unit when EOF is reached and all but the top-level scope is
-/// popped.
-void Sema::ActOnEndOfTranslationUnit() {
-  assert(DelayedDiagnostics.getCurrentPool() == nullptr
-         && "reached end of translation unit with a pool attached?");
-
-  // If code completion is enabled, don't perform any end-of-translation-unit
-  // work.
-  if (PP.isCodeCompletionEnabled())
-    return;
-
-  // Transfer late parsed template instantiations over to the pending template
-  // instantiation list. During normal compliation, the late template parser
-  // will be installed and instantiating these templates will succeed.
-  //
-  // If we are building a TU prefix for serialization, it is also safe to
-  // transfer these over, even though they are not parsed. The end of the TU
-  // should be outside of any eager template instantiation scope, so when this
-  // AST is deserialized, these templates will not be parsed until the end of
-  // the combined TU.
-  PendingInstantiations.insert(PendingInstantiations.end(),
-                               LateParsedInstantiations.begin(),
-                               LateParsedInstantiations.end());
-  LateParsedInstantiations.clear();
-
-  // Complete translation units and modules define vtables and perform implicit
-  // instantiations. PCH files do not.
-  if (TUKind != TU_Prefix) {
-    DiagnoseUseOfUnimplementedSelectors();
-
-    // If DefinedUsedVTables ends up marking any virtual member functions it
-    // might lead to more pending template instantiations, which we then need
-    // to instantiate.
-    DefineUsedVTables();
-
-    // C++: Perform implicit template instantiations.
-    //
-    // FIXME: When we perform these implicit instantiations, we do not
-    // carefully keep track of the point of instantiation (C++ [temp.point]).
-    // This means that name lookup that occurs within the template
-    // instantiation will always happen at the end of the translation unit,
-    // so it will find some names that are not required to be found. This is
-    // valid, but we could do better by diagnosing if an instantiation uses a
-    // name that was not visible at its first point of instantiation.
-    if (ExternalSource) {
-      // Load pending instantiations from the external source.
-      SmallVector<PendingImplicitInstantiation, 4> Pending;
-      ExternalSource->ReadPendingInstantiations(Pending);
-      for (auto PII : Pending)
-        if (auto Func = dyn_cast<FunctionDecl>(PII.first))
-          Func->setInstantiationIsPending(true);
-      PendingInstantiations.insert(PendingInstantiations.begin(),
-                                   Pending.begin(), Pending.end());
-    }
-
-    PerformPendingInstantiations();
-
-    assert(LateParsedInstantiations.empty() &&
-           "end of TU template instantiation should not create more "
-           "late-parsed templates");
-
-    if (LateTemplateParserCleanup)
-      LateTemplateParserCleanup(OpaqueParser);
-
-    CheckDelayedMemberExceptionSpecs();
-  }
-
-  DiagnoseUnterminatedPragmaPack();
-  DiagnoseUnterminatedPragmaAttribute();
-
-  // All delayed member exception specs should be checked or we end up accepting
-  // incompatible declarations.
-  assert(DelayedOverridingExceptionSpecChecks.empty());
-  assert(DelayedEquivalentExceptionSpecChecks.empty());
-  assert(DelayedDefaultedMemberExceptionSpecs.empty());
-
-  // All dllexport classes should have been processed already.
-  assert(DelayedDllExportClasses.empty());
-
-  // Remove file scoped decls that turned out to be used.
-  UnusedFileScopedDecls.erase(
-      std::remove_if(UnusedFileScopedDecls.begin(nullptr, true),
-                     UnusedFileScopedDecls.end(),
-                     [this](const DeclaratorDecl *DD) {
-                       return ShouldRemoveFromUnused(this, DD);
-                     }),
-      UnusedFileScopedDecls.end());
-
-  if (TUKind == TU_Prefix) {
-    // Translation unit prefixes don't need any of the checking below.
-    if (!PP.isIncrementalProcessingEnabled())
-      TUScope = nullptr;
-    return;
-  }
-
-  // Check for #pragma weak identifiers that were never declared
-  LoadExternalWeakUndeclaredIdentifiers();
-  for (auto WeakID : WeakUndeclaredIdentifiers) {
-    if (WeakID.second.getUsed())
-      continue;
-
-    Decl *PrevDecl = LookupSingleName(TUScope, WeakID.first, SourceLocation(),
-                                      LookupOrdinaryName);
-    if (PrevDecl != nullptr &&
-        !(isa<FunctionDecl>(PrevDecl) || isa<VarDecl>(PrevDecl)))
-      Diag(WeakID.second.getLocation(), diag::warn_attribute_wrong_decl_type)
-          << "'weak'" << ExpectedVariableOrFunction;
-    else
-      Diag(WeakID.second.getLocation(), diag::warn_weak_identifier_undeclared)
-          << WeakID.first;
-  }
-
-  if (LangOpts.CPlusPlus11 &&
-      !Diags.isIgnored(diag::warn_delegating_ctor_cycle, SourceLocation()))
-    CheckDelegatingCtorCycles();
-
-  if (!Diags.hasErrorOccurred()) {
-    if (ExternalSource)
-      ExternalSource->ReadUndefinedButUsed(UndefinedButUsed);
-    checkUndefinedButUsed(*this);
-  }
-
-  if (TUKind == TU_Module) {
-    // If we are building a module interface unit, we need to have seen the
-    // module declaration by now.
-    if (getLangOpts().getCompilingModule() ==
-            LangOptions::CMK_ModuleInterface &&
-        (ModuleScopes.empty() ||
-         ModuleScopes.back().Module->Kind != Module::ModuleInterfaceUnit)) {
-      // FIXME: Make a better guess as to where to put the module declaration.
-      Diag(getSourceManager().getLocForStartOfFile(
-               getSourceManager().getMainFileID()),
-           diag::err_module_declaration_missing);
-    }
-
-    // If we are building a module, resolve all of the exported declarations
-    // now.
-    if (Module *CurrentModule = PP.getCurrentModule()) {
-      ModuleMap &ModMap = PP.getHeaderSearchInfo().getModuleMap();
-
-      SmallVector<Module *, 2> Stack;
-      Stack.push_back(CurrentModule);
-      while (!Stack.empty()) {
-        Module *Mod = Stack.pop_back_val();
-
-        // Resolve the exported declarations and conflicts.
-        // FIXME: Actually complain, once we figure out how to teach the
-        // diagnostic client to deal with complaints in the module map at this
-        // point.
-        ModMap.resolveExports(Mod, /*Complain=*/false);
-        ModMap.resolveUses(Mod, /*Complain=*/false);
-        ModMap.resolveConflicts(Mod, /*Complain=*/false);
-
-        // Queue the submodules, so their exports will also be resolved.
-        Stack.append(Mod->submodule_begin(), Mod->submodule_end());
-      }
-    }
-
-    // Warnings emitted in ActOnEndOfTranslationUnit() should be emitted for
-    // modules when they are built, not every time they are used.
-    emitAndClearUnusedLocalTypedefWarnings();
-  }
-
-  // C99 6.9.2p2:
-  //   A declaration of an identifier for an object that has file
-  //   scope without an initializer, and without a storage-class
-  //   specifier or with the storage-class specifier static,
-  //   constitutes a tentative definition. If a translation unit
-  //   contains one or more tentative definitions for an identifier,
-  //   and the translation unit contains no external definition for
-  //   that identifier, then the behavior is exactly as if the
-  //   translation unit contains a file scope declaration of that
-  //   identifier, with the composite type as of the end of the
-  //   translation unit, with an initializer equal to 0.
-  llvm::SmallSet<VarDecl *, 32> Seen;
-  for (TentativeDefinitionsType::iterator
-            T = TentativeDefinitions.begin(ExternalSource),
-         TEnd = TentativeDefinitions.end();
-       T != TEnd; ++T) {
-    VarDecl *VD = (*T)->getActingDefinition();
-
-    // If the tentative definition was completed, getActingDefinition() returns
-    // null. If we've already seen this variable before, insert()'s second
-    // return value is false.
-    if (!VD || VD->isInvalidDecl() || !Seen.insert(VD).second)
-      continue;
-
-    if (const IncompleteArrayType *ArrayT
-        = Context.getAsIncompleteArrayType(VD->getType())) {
-      // Set the length of the array to 1 (C99 6.9.2p5).
-      Diag(VD->getLocation(), diag::warn_tentative_incomplete_array);
-      llvm::APInt One(Context.getTypeSize(Context.getSizeType()), true);
-      QualType T = Context.getConstantArrayType(ArrayT->getElementType(),
-                                                One, ArrayType::Normal, 0);
-      VD->setType(T);
-    } else if (RequireCompleteType(VD->getLocation(), VD->getType(),
-                                   diag::err_tentative_def_incomplete_type))
-      VD->setInvalidDecl();
-
-    // No initialization is performed for a tentative definition.
-    CheckCompleteVariableDeclaration(VD);
-
-    // Notify the consumer that we've completed a tentative definition.
-    if (!VD->isInvalidDecl())
-      Consumer.CompleteTentativeDefinition(VD);
-  }
-
-  // If there were errors, disable 'unused' warnings since they will mostly be
-  // noise. Don't warn for a use from a module: either we should warn on all
-  // file-scope declarations in modules or not at all, but whether the
-  // declaration is used is immaterial.
-  if (!Diags.hasErrorOccurred() && TUKind != TU_Module) {
-    // Output warning for unused file scoped decls.
-    for (UnusedFileScopedDeclsType::iterator
-           I = UnusedFileScopedDecls.begin(ExternalSource),
-           E = UnusedFileScopedDecls.end(); I != E; ++I) {
-      if (ShouldRemoveFromUnused(this, *I))
-        continue;
-
-      if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(*I)) {
-        const FunctionDecl *DiagD;
-        if (!FD->hasBody(DiagD))
-          DiagD = FD;
-        if (DiagD->isDeleted())
-          continue; // Deleted functions are supposed to be unused.
-        if (DiagD->isReferenced()) {
-          if (isa<CXXMethodDecl>(DiagD))
-            Diag(DiagD->getLocation(), diag::warn_unneeded_member_function)
-                  << DiagD->getDeclName();
-          else {
-            if (FD->getStorageClass() == SC_Static &&
-                !FD->isInlineSpecified() &&
-                !SourceMgr.isInMainFile(
-                   SourceMgr.getExpansionLoc(FD->getLocation())))
-              Diag(DiagD->getLocation(),
-                   diag::warn_unneeded_static_internal_decl)
-                  << DiagD->getDeclName();
-            else
-              Diag(DiagD->getLocation(), diag::warn_unneeded_internal_decl)
-                   << /*function*/0 << DiagD->getDeclName();
-          }
-        } else {
-          if (FD->getDescribedFunctionTemplate())
-            Diag(DiagD->getLocation(), diag::warn_unused_template)
-              << /*function*/0 << DiagD->getDeclName();
-          else
-            Diag(DiagD->getLocation(),
-                 isa<CXXMethodDecl>(DiagD) ? diag::warn_unused_member_function
-                                           : diag::warn_unused_function)
-              << DiagD->getDeclName();
-        }
-      } else {
-        const VarDecl *DiagD = cast<VarDecl>(*I)->getDefinition();
-        if (!DiagD)
-          DiagD = cast<VarDecl>(*I);
-        if (DiagD->isReferenced()) {
-          Diag(DiagD->getLocation(), diag::warn_unneeded_internal_decl)
-                << /*variable*/1 << DiagD->getDeclName();
-        } else if (DiagD->getType().isConstQualified()) {
-          const SourceManager &SM = SourceMgr;
-          if (SM.getMainFileID() != SM.getFileID(DiagD->getLocation()) ||
-              !PP.getLangOpts().IsHeaderFile)
-            Diag(DiagD->getLocation(), diag::warn_unused_const_variable)
-                << DiagD->getDeclName();
-        } else {
-          if (DiagD->getDescribedVarTemplate())
-            Diag(DiagD->getLocation(), diag::warn_unused_template)
-              << /*variable*/1 << DiagD->getDeclName();
-          else
-            Diag(DiagD->getLocation(), diag::warn_unused_variable)
-              << DiagD->getDeclName();
-        }
-      }
-    }
-
-    emitAndClearUnusedLocalTypedefWarnings();
-  }
-
-  if (!Diags.isIgnored(diag::warn_unused_private_field, SourceLocation())) {
-    // FIXME: Load additional unused private field candidates from the external
-    // source.
-    RecordCompleteMap RecordsComplete;
-    RecordCompleteMap MNCComplete;
-    for (NamedDeclSetType::iterator I = UnusedPrivateFields.begin(),
-         E = UnusedPrivateFields.end(); I != E; ++I) {
-      const NamedDecl *D = *I;
-      const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(D->getDeclContext());
-      if (RD && !RD->isUnion() &&
-          IsRecordFullyDefined(RD, RecordsComplete, MNCComplete)) {
-        Diag(D->getLocation(), diag::warn_unused_private_field)
-              << D->getDeclName();
-      }
-    }
-  }
-
-  if (!Diags.isIgnored(diag::warn_mismatched_delete_new, SourceLocation())) {
-    if (ExternalSource)
-      ExternalSource->ReadMismatchingDeleteExpressions(DeleteExprs);
-    for (const auto &DeletedFieldInfo : DeleteExprs) {
-      for (const auto &DeleteExprLoc : DeletedFieldInfo.second) {
-        AnalyzeDeleteExprMismatch(DeletedFieldInfo.first, DeleteExprLoc.first,
-                                  DeleteExprLoc.second);
-      }
-    }
-  }
-
-  // Check we've noticed that we're no longer parsing the initializer for every
-  // variable. If we miss cases, then at best we have a performance issue and
-  // at worst a rejects-valid bug.
-  assert(ParsingInitForAutoVars.empty() &&
-         "Didn't unmark var as having its initializer parsed");
-
-  if (!PP.isIncrementalProcessingEnabled())
-    TUScope = nullptr;
-}
-
-
-//===----------------------------------------------------------------------===//
-// Helper functions.
-//===----------------------------------------------------------------------===//
-
-DeclContext *Sema::getFunctionLevelDeclContext() {
-  DeclContext *DC = CurContext;
-
-  while (true) {
-    if (isa<BlockDecl>(DC) || isa<EnumDecl>(DC) || isa<CapturedDecl>(DC)) {
-      DC = DC->getParent();
-    } else if (isa<CXXMethodDecl>(DC) &&
-               cast<CXXMethodDecl>(DC)->getOverloadedOperator() == OO_Call &&
-               cast<CXXRecordDecl>(DC->getParent())->isLambda()) {
-      DC = DC->getParent()->getParent();
-    }
-    else break;
-  }
-
-  return DC;
-}
-
-/// getCurFunctionDecl - If inside of a function body, this returns a pointer
-/// to the function decl for the function being parsed.  If we're currently
-/// in a 'block', this returns the containing context.
-FunctionDecl *Sema::getCurFunctionDecl() {
-  DeclContext *DC = getFunctionLevelDeclContext();
-  return dyn_cast<FunctionDecl>(DC);
-}
-
-ObjCMethodDecl *Sema::getCurMethodDecl() {
-  DeclContext *DC = getFunctionLevelDeclContext();
-  while (isa<RecordDecl>(DC))
-    DC = DC->getParent();
-  return dyn_cast<ObjCMethodDecl>(DC);
-}
-
-NamedDecl *Sema::getCurFunctionOrMethodDecl() {
-  DeclContext *DC = getFunctionLevelDeclContext();
-  if (isa<ObjCMethodDecl>(DC) || isa<FunctionDecl>(DC))
-    return cast<NamedDecl>(DC);
-  return nullptr;
-}
-
-void Sema::EmitCurrentDiagnostic(unsigned DiagID) {
-  // FIXME: It doesn't make sense to me that DiagID is an incoming argument here
-  // and yet we also use the current diag ID on the DiagnosticsEngine. This has
-  // been made more painfully obvious by the refactor that introduced this
-  // function, but it is possible that the incoming argument can be
-  // eliminated. If it truly cannot be (for example, there is some reentrancy
-  // issue I am not seeing yet), then there should at least be a clarifying
-  // comment somewhere.
-  if (Optional<TemplateDeductionInfo*> Info = isSFINAEContext()) {
-    switch (DiagnosticIDs::getDiagnosticSFINAEResponse(
-              Diags.getCurrentDiagID())) {
-    case DiagnosticIDs::SFINAE_Report:
-      // We'll report the diagnostic below.
-      break;
-
-    case DiagnosticIDs::SFINAE_SubstitutionFailure:
-      // Count this failure so that we know that template argument deduction
-      // has failed.
-      ++NumSFINAEErrors;
-
-      // Make a copy of this suppressed diagnostic and store it with the
-      // template-deduction information.
-      if (*Info && !(*Info)->hasSFINAEDiagnostic()) {
-        Diagnostic DiagInfo(&Diags);
-        (*Info)->addSFINAEDiagnostic(DiagInfo.getLocation(),
-                       PartialDiagnostic(DiagInfo, Context.getDiagAllocator()));
-      }
-
-      Diags.setLastDiagnosticIgnored();
-      Diags.Clear();
-      return;
-
-    case DiagnosticIDs::SFINAE_AccessControl: {
-      // Per C++ Core Issue 1170, access control is part of SFINAE.
-      // Additionally, the AccessCheckingSFINAE flag can be used to temporarily
-      // make access control a part of SFINAE for the purposes of checking
-      // type traits.
-      if (!AccessCheckingSFINAE && !getLangOpts().CPlusPlus11)
-        break;
-
-      SourceLocation Loc = Diags.getCurrentDiagLoc();
-
-      // Suppress this diagnostic.
-      ++NumSFINAEErrors;
-
-      // Make a copy of this suppressed diagnostic and store it with the
-      // template-deduction information.
-      if (*Info && !(*Info)->hasSFINAEDiagnostic()) {
-        Diagnostic DiagInfo(&Diags);
-        (*Info)->addSFINAEDiagnostic(DiagInfo.getLocation(),
-                       PartialDiagnostic(DiagInfo, Context.getDiagAllocator()));
-      }
-
-      Diags.setLastDiagnosticIgnored();
-      Diags.Clear();
-
-      // Now the diagnostic state is clear, produce a C++98 compatibility
-      // warning.
-      Diag(Loc, diag::warn_cxx98_compat_sfinae_access_control);
-
-      // The last diagnostic which Sema produced was ignored. Suppress any
-      // notes attached to it.
-      Diags.setLastDiagnosticIgnored();
-      return;
-    }
-
-    case DiagnosticIDs::SFINAE_Suppress:
-      // Make a copy of this suppressed diagnostic and store it with the
-      // template-deduction information;
-      if (*Info) {
-        Diagnostic DiagInfo(&Diags);
-        (*Info)->addSuppressedDiagnostic(DiagInfo.getLocation(),
-                       PartialDiagnostic(DiagInfo, Context.getDiagAllocator()));
-      }
-
-      // Suppress this diagnostic.
-      Diags.setLastDiagnosticIgnored();
-      Diags.Clear();
-      return;
-    }
-  }
-
-  // Copy the diagnostic printing policy over the ASTContext printing policy.
-  // TODO: Stop doing that.  See: https://reviews.llvm.org/D45093#1090292
-  Context.setPrintingPolicy(getPrintingPolicy());
-
-  // Emit the diagnostic.
-  if (!Diags.EmitCurrentDiagnostic())
-    return;
-
-  // If this is not a note, and we're in a template instantiation
-  // that is different from the last template instantiation where
-  // we emitted an error, print a template instantiation
-  // backtrace.
-  if (!DiagnosticIDs::isBuiltinNote(DiagID))
-    PrintContextStack();
-}
-
-Sema::SemaDiagnosticBuilder
-Sema::Diag(SourceLocation Loc, const PartialDiagnostic& PD) {
-  SemaDiagnosticBuilder Builder(Diag(Loc, PD.getDiagID()));
-  PD.Emit(Builder);
-
-  return Builder;
-}
-
-/// Looks through the macro-expansion chain for the given
-/// location, looking for a macro expansion with the given name.
-/// If one is found, returns true and sets the location to that
-/// expansion loc.
-bool Sema::findMacroSpelling(SourceLocation &locref, StringRef name) {
-  SourceLocation loc = locref;
-  if (!loc.isMacroID()) return false;
-
-  // There's no good way right now to look at the intermediate
-  // expansions, so just jump to the expansion location.
-  loc = getSourceManager().getExpansionLoc(loc);
-
-  // If that's written with the name, stop here.
-  SmallVector<char, 16> buffer;
-  if (getPreprocessor().getSpelling(loc, buffer) == name) {
-    locref = loc;
-    return true;
-  }
-  return false;
-}
-
-/// Determines the active Scope associated with the given declaration
-/// context.
-///
-/// This routine maps a declaration context to the active Scope object that
-/// represents that declaration context in the parser. It is typically used
-/// from "scope-less" code (e.g., template instantiation, lazy creation of
-/// declarations) that injects a name for name-lookup purposes and, therefore,
-/// must update the Scope.
-///
-/// \returns The scope corresponding to the given declaraion context, or NULL
-/// if no such scope is open.
-Scope *Sema::getScopeForContext(DeclContext *Ctx) {
-
-  if (!Ctx)
-    return nullptr;
-
-  Ctx = Ctx->getPrimaryContext();
-  for (Scope *S = getCurScope(); S; S = S->getParent()) {
-    // Ignore scopes that cannot have declarations. This is important for
-    // out-of-line definitions of static class members.
-    if (S->getFlags() & (Scope::DeclScope | Scope::TemplateParamScope))
-      if (DeclContext *Entity = S->getEntity())
-        if (Ctx == Entity->getPrimaryContext())
-          return S;
-  }
-
-  return nullptr;
-}
-
-/// Enter a new function scope
-void Sema::PushFunctionScope() {
-  if (FunctionScopes.empty()) {
-    // Use PreallocatedFunctionScope to avoid allocating memory when possible.
-    PreallocatedFunctionScope->Clear();
-    FunctionScopes.push_back(PreallocatedFunctionScope.get());
-  } else {
-    FunctionScopes.push_back(new FunctionScopeInfo(getDiagnostics()));
-  }
-  if (LangOpts.OpenMP)
-    pushOpenMPFunctionRegion();
-}
-
-void Sema::PushBlockScope(Scope *BlockScope, BlockDecl *Block) {
-  FunctionScopes.push_back(new BlockScopeInfo(getDiagnostics(),
-                                              BlockScope, Block));
-}
-
-LambdaScopeInfo *Sema::PushLambdaScope() {
-  LambdaScopeInfo *const LSI = new LambdaScopeInfo(getDiagnostics());
-  FunctionScopes.push_back(LSI);
-  return LSI;
-}
-
-void Sema::RecordParsingTemplateParameterDepth(unsigned Depth) {
-  if (LambdaScopeInfo *const LSI = getCurLambda()) {
-    LSI->AutoTemplateParameterDepth = Depth;
-    return;
-  }
-  llvm_unreachable(
-      "Remove assertion if intentionally called in a non-lambda context.");
-}
-
-// Check that the type of the VarDecl has an accessible copy constructor and
-// resolve its destructor's exception spefication.
-static void checkEscapingByref(VarDecl *VD, Sema &S) {
-  QualType T = VD->getType();
-  EnterExpressionEvaluationContext scope(
-      S, Sema::ExpressionEvaluationContext::PotentiallyEvaluated);
-  SourceLocation Loc = VD->getLocation();
-  Expr *VarRef =
-      new (S.Context) DeclRefExpr(S.Context, VD, false, T, VK_LValue, Loc);
-  ExprResult Result = S.PerformMoveOrCopyInitialization(
-      InitializedEntity::InitializeBlock(Loc, T, false), VD, VD->getType(),
-      VarRef, /*AllowNRVO=*/true);
-  if (!Result.isInvalid()) {
-    Result = S.MaybeCreateExprWithCleanups(Result);
-    Expr *Init = Result.getAs<Expr>();
-    S.Context.setBlockVarCopyInit(VD, Init, S.canThrow(Init));
-  }
-
-  // The destructor's exception spefication is needed when IRGen generates
-  // block copy/destroy functions. Resolve it here.
-  if (const CXXRecordDecl *RD = T->getAsCXXRecordDecl())
-    if (CXXDestructorDecl *DD = RD->getDestructor()) {
-      auto *FPT = DD->getType()->getAs<FunctionProtoType>();
-      S.ResolveExceptionSpec(Loc, FPT);
-    }
-}
-
-static void markEscapingByrefs(const FunctionScopeInfo &FSI, Sema &S) {
-  // Set the EscapingByref flag of __block variables captured by
-  // escaping blocks.
-  for (const BlockDecl *BD : FSI.Blocks) {
-    if (BD->doesNotEscape())
-      continue;
-    for (const BlockDecl::Capture &BC : BD->captures()) {
-      VarDecl *VD = BC.getVariable();
-      if (VD->hasAttr<BlocksAttr>())
-        VD->setEscapingByref();
-    }
-  }
-
-  for (VarDecl *VD : FSI.ByrefBlockVars) {
-    // __block variables might require us to capture a copy-initializer.
-    if (!VD->isEscapingByref())
-      continue;
-    // It's currently invalid to ever have a __block variable with an
-    // array type; should we diagnose that here?
-    // Regardless, we don't want to ignore array nesting when
-    // constructing this copy.
-    if (VD->getType()->isStructureOrClassType())
-      checkEscapingByref(VD, S);
-  }
-}
-
-void Sema::PopFunctionScopeInfo(const AnalysisBasedWarnings::Policy *WP,
-                                const Decl *D, const BlockExpr *blkExpr) {
-  assert(!FunctionScopes.empty() && "mismatched push/pop!");
-
-  // This function shouldn't be called after popping the current function scope.
-  // markEscapingByrefs calls PerformMoveOrCopyInitialization, which can call
-  // PushFunctionScope, which can cause clearing out PreallocatedFunctionScope
-  // when FunctionScopes is empty.
-  markEscapingByrefs(*FunctionScopes.back(), *this);
-
-  FunctionScopeInfo *Scope = FunctionScopes.pop_back_val();
-
-  if (LangOpts.OpenMP)
-    popOpenMPFunctionRegion(Scope);
-
-  // Issue any analysis-based warnings.
-  if (WP && D)
-    AnalysisWarnings.IssueWarnings(*WP, Scope, D, blkExpr);
-  else
-    for (const auto &PUD : Scope->PossiblyUnreachableDiags)
-      Diag(PUD.Loc, PUD.PD);
-
-  // Delete the scope unless its our preallocated scope.
-  if (Scope != PreallocatedFunctionScope.get())
-    delete Scope;
-}
-
-void Sema::PushCompoundScope(bool IsStmtExpr) {
-  getCurFunction()->CompoundScopes.push_back(CompoundScopeInfo(IsStmtExpr));
-}
-
-void Sema::PopCompoundScope() {
-  FunctionScopeInfo *CurFunction = getCurFunction();
-  assert(!CurFunction->CompoundScopes.empty() && "mismatched push/pop");
-
-  CurFunction->CompoundScopes.pop_back();
-}
-
-/// Determine whether any errors occurred within this function/method/
-/// block.
-bool Sema::hasAnyUnrecoverableErrorsInThisFunction() const {
-  return getCurFunction()->ErrorTrap.hasUnrecoverableErrorOccurred();
-}
-
-void Sema::setFunctionHasBranchIntoScope() {
-  if (!FunctionScopes.empty())
-    FunctionScopes.back()->setHasBranchIntoScope();
-}
-
-void Sema::setFunctionHasBranchProtectedScope() {
-  if (!FunctionScopes.empty())
-    FunctionScopes.back()->setHasBranchProtectedScope();
-}
-
-void Sema::setFunctionHasIndirectGoto() {
-  if (!FunctionScopes.empty())
-    FunctionScopes.back()->setHasIndirectGoto();
-}
-
-BlockScopeInfo *Sema::getCurBlock() {
-  if (FunctionScopes.empty())
-    return nullptr;
-
-  auto CurBSI = dyn_cast<BlockScopeInfo>(FunctionScopes.back());
-  if (CurBSI && CurBSI->TheDecl &&
-      !CurBSI->TheDecl->Encloses(CurContext)) {
-    // We have switched contexts due to template instantiation.
-    assert(!CodeSynthesisContexts.empty());
-    return nullptr;
-  }
-
-  return CurBSI;
-}
-
-FunctionScopeInfo *Sema::getEnclosingFunction() const {
-  if (FunctionScopes.empty())
-    return nullptr;
-
-  for (int e = FunctionScopes.size() - 1; e >= 0; --e) {
-    if (isa<sema::BlockScopeInfo>(FunctionScopes[e]))
-      continue;
-    return FunctionScopes[e];
-  }
-  return nullptr;
-}
-
-LambdaScopeInfo *Sema::getCurLambda(bool IgnoreNonLambdaCapturingScope) {
-  if (FunctionScopes.empty())
-    return nullptr;
-
-  auto I = FunctionScopes.rbegin();
-  if (IgnoreNonLambdaCapturingScope) {
-    auto E = FunctionScopes.rend();
-    while (I != E && isa<CapturingScopeInfo>(*I) && !isa<LambdaScopeInfo>(*I))
-      ++I;
-    if (I == E)
-      return nullptr;
-  }
-  auto *CurLSI = dyn_cast<LambdaScopeInfo>(*I);
-  if (CurLSI && CurLSI->Lambda &&
-      !CurLSI->Lambda->Encloses(CurContext)) {
-    // We have switched contexts due to template instantiation.
-    assert(!CodeSynthesisContexts.empty());
-    return nullptr;
-  }
-
-  return CurLSI;
-}
-// We have a generic lambda if we parsed auto parameters, or we have
-// an associated template parameter list.
-LambdaScopeInfo *Sema::getCurGenericLambda() {
-  if (LambdaScopeInfo *LSI =  getCurLambda()) {
-    return (LSI->AutoTemplateParams.size() ||
-                    LSI->GLTemplateParameterList) ? LSI : nullptr;
-  }
-  return nullptr;
-}
-
-
-void Sema::ActOnComment(SourceRange Comment) {
-  if (!LangOpts.RetainCommentsFromSystemHeaders &&
-      SourceMgr.isInSystemHeader(Comment.getBegin()))
-    return;
-  RawComment RC(SourceMgr, Comment, LangOpts.CommentOpts, false);
-  if (RC.isAlmostTrailingComment()) {
-    SourceRange MagicMarkerRange(Comment.getBegin(),
-                                 Comment.getBegin().getLocWithOffset(3));
-    StringRef MagicMarkerText;
-    switch (RC.getKind()) {
-    case RawComment::RCK_OrdinaryBCPL:
-      MagicMarkerText = "///<";
-      break;
-    case RawComment::RCK_OrdinaryC:
-      MagicMarkerText = "/**<";
-      break;
-    default:
-      llvm_unreachable("if this is an almost Doxygen comment, "
-                       "it should be ordinary");
-    }
-    Diag(Comment.getBegin(), diag::warn_not_a_doxygen_trailing_member_comment) <<
-      FixItHint::CreateReplacement(MagicMarkerRange, MagicMarkerText);
-  }
-  Context.addComment(RC);
-}
-
-// Pin this vtable to this file.
-ExternalSemaSource::~ExternalSemaSource() {}
-
-void ExternalSemaSource::ReadMethodPool(Selector Sel) { }
-void ExternalSemaSource::updateOutOfDateSelector(Selector Sel) { }
-
-void ExternalSemaSource::ReadKnownNamespaces(
-                           SmallVectorImpl<NamespaceDecl *> &Namespaces) {
-}
-
-void ExternalSemaSource::ReadUndefinedButUsed(
-    llvm::MapVector<NamedDecl *, SourceLocation> &Undefined) {}
-
-void ExternalSemaSource::ReadMismatchingDeleteExpressions(llvm::MapVector<
-    FieldDecl *, llvm::SmallVector<std::pair<SourceLocation, bool>, 4>> &) {}
-
-/// Figure out if an expression could be turned into a call.
-///
-/// Use this when trying to recover from an error where the programmer may have
-/// written just the name of a function instead of actually calling it.
-///
-/// \param E - The expression to examine.
-/// \param ZeroArgCallReturnTy - If the expression can be turned into a call
-///  with no arguments, this parameter is set to the type returned by such a
-///  call; otherwise, it is set to an empty QualType.
-/// \param OverloadSet - If the expression is an overloaded function
-///  name, this parameter is populated with the decls of the various overloads.
-bool Sema::tryExprAsCall(Expr &E, QualType &ZeroArgCallReturnTy,
-                         UnresolvedSetImpl &OverloadSet) {
-  ZeroArgCallReturnTy = QualType();
-  OverloadSet.clear();
-
-  const OverloadExpr *Overloads = nullptr;
-  bool IsMemExpr = false;
-  if (E.getType() == Context.OverloadTy) {
-    OverloadExpr::FindResult FR = OverloadExpr::find(const_cast<Expr*>(&E));
-
-    // Ignore overloads that are pointer-to-member constants.
-    if (FR.HasFormOfMemberPointer)
-      return false;
-
-    Overloads = FR.Expression;
-  } else if (E.getType() == Context.BoundMemberTy) {
-    Overloads = dyn_cast<UnresolvedMemberExpr>(E.IgnoreParens());
-    IsMemExpr = true;
-  }
-
-  bool Ambiguous = false;
-  bool IsMV = false;
-
-  if (Overloads) {
-    for (OverloadExpr::decls_iterator it = Overloads->decls_begin(),
-         DeclsEnd = Overloads->decls_end(); it != DeclsEnd; ++it) {
-      OverloadSet.addDecl(*it);
-
-      // Check whether the function is a non-template, non-member which takes no
-      // arguments.
-      if (IsMemExpr)
-        continue;
-      if (const FunctionDecl *OverloadDecl
-            = dyn_cast<FunctionDecl>((*it)->getUnderlyingDecl())) {
-        if (OverloadDecl->getMinRequiredArguments() == 0) {
-          if (!ZeroArgCallReturnTy.isNull() && !Ambiguous &&
-              (!IsMV || !(OverloadDecl->isCPUDispatchMultiVersion() ||
-                          OverloadDecl->isCPUSpecificMultiVersion()))) {
-            ZeroArgCallReturnTy = QualType();
-            Ambiguous = true;
-          } else {
-            ZeroArgCallReturnTy = OverloadDecl->getReturnType();
-            IsMV = OverloadDecl->isCPUDispatchMultiVersion() ||
-                   OverloadDecl->isCPUSpecificMultiVersion();
-          }
-        }
-      }
-    }
-
-    // If it's not a member, use better machinery to try to resolve the call
-    if (!IsMemExpr)
-      return !ZeroArgCallReturnTy.isNull();
-  }
-
-  // Attempt to call the member with no arguments - this will correctly handle
-  // member templates with defaults/deduction of template arguments, overloads
-  // with default arguments, etc.
-  if (IsMemExpr && !E.isTypeDependent()) {
-    bool Suppress = getDiagnostics().getSuppressAllDiagnostics();
-    getDiagnostics().setSuppressAllDiagnostics(true);
-    ExprResult R = BuildCallToMemberFunction(nullptr, &E, SourceLocation(),
-                                             None, SourceLocation());
-    getDiagnostics().setSuppressAllDiagnostics(Suppress);
-    if (R.isUsable()) {
-      ZeroArgCallReturnTy = R.get()->getType();
-      return true;
-    }
-    return false;
-  }
-
-  if (const DeclRefExpr *DeclRef = dyn_cast<DeclRefExpr>(E.IgnoreParens())) {
-    if (const FunctionDecl *Fun = dyn_cast<FunctionDecl>(DeclRef->getDecl())) {
-      if (Fun->getMinRequiredArguments() == 0)
-        ZeroArgCallReturnTy = Fun->getReturnType();
-      return true;
-    }
-  }
-
-  // We don't have an expression that's convenient to get a FunctionDecl from,
-  // but we can at least check if the type is "function of 0 arguments".
-  QualType ExprTy = E.getType();
-  const FunctionType *FunTy = nullptr;
-  QualType PointeeTy = ExprTy->getPointeeType();
-  if (!PointeeTy.isNull())
-    FunTy = PointeeTy->getAs<FunctionType>();
-  if (!FunTy)
-    FunTy = ExprTy->getAs<FunctionType>();
-
-  if (const FunctionProtoType *FPT =
-      dyn_cast_or_null<FunctionProtoType>(FunTy)) {
-    if (FPT->getNumParams() == 0)
-      ZeroArgCallReturnTy = FunTy->getReturnType();
-    return true;
-  }
-  return false;
-}
-
-/// Give notes for a set of overloads.
-///
-/// A companion to tryExprAsCall. In cases when the name that the programmer
-/// wrote was an overloaded function, we may be able to make some guesses about
-/// plausible overloads based on their return types; such guesses can be handed
-/// off to this method to be emitted as notes.
-///
-/// \param Overloads - The overloads to note.
-/// \param FinalNoteLoc - If we've suppressed printing some overloads due to
-///  -fshow-overloads=best, this is the location to attach to the note about too
-///  many candidates. Typically this will be the location of the original
-///  ill-formed expression.
-static void noteOverloads(Sema &S, const UnresolvedSetImpl &Overloads,
-                          const SourceLocation FinalNoteLoc) {
-  int ShownOverloads = 0;
-  int SuppressedOverloads = 0;
-  for (UnresolvedSetImpl::iterator It = Overloads.begin(),
-       DeclsEnd = Overloads.end(); It != DeclsEnd; ++It) {
-    // FIXME: Magic number for max shown overloads stolen from
-    // OverloadCandidateSet::NoteCandidates.
-    if (ShownOverloads >= 4 && S.Diags.getShowOverloads() == Ovl_Best) {
-      ++SuppressedOverloads;
-      continue;
-    }
-
-    NamedDecl *Fn = (*It)->getUnderlyingDecl();
-    // Don't print overloads for non-default multiversioned functions.
-    if (const auto *FD = Fn->getAsFunction()) {
-      if (FD->isMultiVersion() && FD->hasAttr<TargetAttr>() &&
-          !FD->getAttr<TargetAttr>()->isDefaultVersion())
-        continue;
-    }
-    S.Diag(Fn->getLocation(), diag::note_possible_target_of_call);
-    ++ShownOverloads;
-  }
-
-  if (SuppressedOverloads)
-    S.Diag(FinalNoteLoc, diag::note_ovl_too_many_candidates)
-      << SuppressedOverloads;
-}
-
-static void notePlausibleOverloads(Sema &S, SourceLocation Loc,
-                                   const UnresolvedSetImpl &Overloads,
-                                   bool (*IsPlausibleResult)(QualType)) {
-  if (!IsPlausibleResult)
-    return noteOverloads(S, Overloads, Loc);
-
-  UnresolvedSet<2> PlausibleOverloads;
-  for (OverloadExpr::decls_iterator It = Overloads.begin(),
-         DeclsEnd = Overloads.end(); It != DeclsEnd; ++It) {
-    const FunctionDecl *OverloadDecl = cast<FunctionDecl>(*It);
-    QualType OverloadResultTy = OverloadDecl->getReturnType();
-    if (IsPlausibleResult(OverloadResultTy))
-      PlausibleOverloads.addDecl(It.getDecl());
-  }
-  noteOverloads(S, PlausibleOverloads, Loc);
-}
-
-/// Determine whether the given expression can be called by just
-/// putting parentheses after it.  Notably, expressions with unary
-/// operators can't be because the unary operator will start parsing
-/// outside the call.
-static bool IsCallableWithAppend(Expr *E) {
-  E = E->IgnoreImplicit();
-  return (!isa<CStyleCastExpr>(E) &&
-          !isa<UnaryOperator>(E) &&
-          !isa<BinaryOperator>(E) &&
-          !isa<CXXOperatorCallExpr>(E));
-}
-
-static bool IsCPUDispatchCPUSpecificMultiVersion(const Expr *E) {
-  if (const auto *UO = dyn_cast<UnaryOperator>(E))
-    E = UO->getSubExpr();
-
-  if (const auto *ULE = dyn_cast<UnresolvedLookupExpr>(E)) {
-    if (ULE->getNumDecls() == 0)
-      return false;
-
-    const NamedDecl *ND = *ULE->decls_begin();
-    if (const auto *FD = dyn_cast<FunctionDecl>(ND))
-      return FD->isCPUDispatchMultiVersion() || FD->isCPUSpecificMultiVersion();
-  }
-  return false;
-}
-
-bool Sema::tryToRecoverWithCall(ExprResult &E, const PartialDiagnostic &PD,
-                                bool ForceComplain,
-                                bool (*IsPlausibleResult)(QualType)) {
-  SourceLocation Loc = E.get()->getExprLoc();
-  SourceRange Range = E.get()->getSourceRange();
-
-  QualType ZeroArgCallTy;
-  UnresolvedSet<4> Overloads;
-  if (tryExprAsCall(*E.get(), ZeroArgCallTy, Overloads) &&
-      !ZeroArgCallTy.isNull() &&
-      (!IsPlausibleResult || IsPlausibleResult(ZeroArgCallTy))) {
-    // At this point, we know E is potentially callable with 0
-    // arguments and that it returns something of a reasonable type,
-    // so we can emit a fixit and carry on pretending that E was
-    // actually a CallExpr.
-    SourceLocation ParenInsertionLoc = getLocForEndOfToken(Range.getEnd());
-    bool IsMV = IsCPUDispatchCPUSpecificMultiVersion(E.get());
-    Diag(Loc, PD) << /*zero-arg*/ 1 << IsMV << Range
-                  << (IsCallableWithAppend(E.get())
-                          ? FixItHint::CreateInsertion(ParenInsertionLoc, "()")
-                          : FixItHint());
-    if (!IsMV)
-      notePlausibleOverloads(*this, Loc, Overloads, IsPlausibleResult);
-
-    // FIXME: Try this before emitting the fixit, and suppress diagnostics
-    // while doing so.
-    E = ActOnCallExpr(nullptr, E.get(), Range.getEnd(), None,
-                      Range.getEnd().getLocWithOffset(1));
-    return true;
-  }
-
-  if (!ForceComplain) return false;
-
-  bool IsMV = IsCPUDispatchCPUSpecificMultiVersion(E.get());
-  Diag(Loc, PD) << /*not zero-arg*/ 0 << IsMV << Range;
-  if (!IsMV)
-    notePlausibleOverloads(*this, Loc, Overloads, IsPlausibleResult);
-  E = ExprError();
-  return true;
-}
-
-IdentifierInfo *Sema::getSuperIdentifier() const {
-  if (!Ident_super)
-    Ident_super = &Context.Idents.get("super");
-  return Ident_super;
-}
-
-IdentifierInfo *Sema::getFloat128Identifier() const {
-  if (!Ident___float128)
-    Ident___float128 = &Context.Idents.get("__float128");
-  return Ident___float128;
-}
-
-void Sema::PushCapturedRegionScope(Scope *S, CapturedDecl *CD, RecordDecl *RD,
-                                   CapturedRegionKind K) {
-  CapturingScopeInfo *CSI = new CapturedRegionScopeInfo(
-      getDiagnostics(), S, CD, RD, CD->getContextParam(), K,
-      (getLangOpts().OpenMP && K == CR_OpenMP) ? getOpenMPNestingLevel() : 0);
-  CSI->ReturnType = Context.VoidTy;
-  FunctionScopes.push_back(CSI);
-}
-
-CapturedRegionScopeInfo *Sema::getCurCapturedRegion() {
-  if (FunctionScopes.empty())
-    return nullptr;
-
-  return dyn_cast<CapturedRegionScopeInfo>(FunctionScopes.back());
-}
-
-const llvm::MapVector<FieldDecl *, Sema::DeleteLocs> &
-Sema::getMismatchingDeleteExpressions() const {
-  return DeleteExprs;
-}
-
-void Sema::setOpenCLExtensionForType(QualType T, llvm::StringRef ExtStr) {
-  if (ExtStr.empty())
-    return;
-  llvm::SmallVector<StringRef, 1> Exts;
-  ExtStr.split(Exts, " ", /* limit */ -1, /* keep empty */ false);
-  auto CanT = T.getCanonicalType().getTypePtr();
-  for (auto &I : Exts)
-    OpenCLTypeExtMap[CanT].insert(I.str());
-}
-
-void Sema::setOpenCLExtensionForDecl(Decl *FD, StringRef ExtStr) {
-  llvm::SmallVector<StringRef, 1> Exts;
-  ExtStr.split(Exts, " ", /* limit */ -1, /* keep empty */ false);
-  if (Exts.empty())
-    return;
-  for (auto &I : Exts)
-    OpenCLDeclExtMap[FD].insert(I.str());
-}
-
-void Sema::setCurrentOpenCLExtensionForType(QualType T) {
-  if (CurrOpenCLExtension.empty())
-    return;
-  setOpenCLExtensionForType(T, CurrOpenCLExtension);
-}
-
-void Sema::setCurrentOpenCLExtensionForDecl(Decl *D) {
-  if (CurrOpenCLExtension.empty())
-    return;
-  setOpenCLExtensionForDecl(D, CurrOpenCLExtension);
-}
-
-std::string Sema::getOpenCLExtensionsFromDeclExtMap(FunctionDecl *FD) {
-  if (!OpenCLDeclExtMap.empty())
-    return getOpenCLExtensionsFromExtMap(FD, OpenCLDeclExtMap);
-
-  return "";
-}
-
-std::string Sema::getOpenCLExtensionsFromTypeExtMap(FunctionType *FT) {
-  if (!OpenCLTypeExtMap.empty())
-    return getOpenCLExtensionsFromExtMap(FT, OpenCLTypeExtMap);
-
-  return "";
-}
-
-template <typename T, typename MapT>
-std::string Sema::getOpenCLExtensionsFromExtMap(T *FDT, MapT &Map) {
-  std::string ExtensionNames = "";
-  auto Loc = Map.find(FDT);
-
-  for (auto const& I : Loc->second) {
-    ExtensionNames += I;
-    ExtensionNames += " ";
-  }
-  ExtensionNames.pop_back();
-
-  return ExtensionNames;
-}
-
-bool Sema::isOpenCLDisabledDecl(Decl *FD) {
-  auto Loc = OpenCLDeclExtMap.find(FD);
-  if (Loc == OpenCLDeclExtMap.end())
-    return false;
-  for (auto &I : Loc->second) {
-    if (!getOpenCLOptions().isEnabled(I))
-      return true;
-  }
-  return false;
-}
-
-template <typename T, typename DiagLocT, typename DiagInfoT, typename MapT>
-bool Sema::checkOpenCLDisabledTypeOrDecl(T D, DiagLocT DiagLoc,
-                                         DiagInfoT DiagInfo, MapT &Map,
-                                         unsigned Selector,
-                                         SourceRange SrcRange) {
-  auto Loc = Map.find(D);
-  if (Loc == Map.end())
-    return false;
-  bool Disabled = false;
-  for (auto &I : Loc->second) {
-    if (I != CurrOpenCLExtension && !getOpenCLOptions().isEnabled(I)) {
-      Diag(DiagLoc, diag::err_opencl_requires_extension) << Selector << DiagInfo
-                                                         << I << SrcRange;
-      Disabled = true;
-    }
-  }
-  return Disabled;
-}
-
-bool Sema::checkOpenCLDisabledTypeDeclSpec(const DeclSpec &DS, QualType QT) {
-  // Check extensions for declared types.
-  Decl *Decl = nullptr;
-  if (auto TypedefT = dyn_cast<TypedefType>(QT.getTypePtr()))
-    Decl = TypedefT->getDecl();
-  if (auto TagT = dyn_cast<TagType>(QT.getCanonicalType().getTypePtr()))
-    Decl = TagT->getDecl();
-  auto Loc = DS.getTypeSpecTypeLoc();
-
-  // Check extensions for vector types.
-  // e.g. double4 is not allowed when cl_khr_fp64 is absent.
-  if (QT->isExtVectorType()) {
-    auto TypePtr = QT->castAs<ExtVectorType>()->getElementType().getTypePtr();
-    return checkOpenCLDisabledTypeOrDecl(TypePtr, Loc, QT, OpenCLTypeExtMap);
-  }
-
-  if (checkOpenCLDisabledTypeOrDecl(Decl, Loc, QT, OpenCLDeclExtMap))
-    return true;
-
-  // Check extensions for builtin types.
-  return checkOpenCLDisabledTypeOrDecl(QT.getCanonicalType().getTypePtr(), Loc,
-                                       QT, OpenCLTypeExtMap);
-}
-
-bool Sema::checkOpenCLDisabledDecl(const NamedDecl &D, const Expr &E) {
-  IdentifierInfo *FnName = D.getIdentifier();
-  return checkOpenCLDisabledTypeOrDecl(&D, E.getBeginLoc(), FnName,
-                                       OpenCLDeclExtMap, 1, D.getSourceRange());
-}