Remove LLVM 8.0.1 files.

1 files changed, 0 insertions, 4708 deletions

diff --git a/gnu/llvm/tools/clang/lib/AST/Decl.cpp b/gnu/llvm/tools/clang/lib/AST/Decl.cpp
deleted file mode 100644
index 5536358b1ec..00000000000
--- a/gnu/llvm/tools/clang/lib/AST/Decl.cpp
+++ /dev/null
@@ -1,4708 +0,0 @@
-//===- Decl.cpp - Declaration 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 Decl subclasses.
-//
-//===----------------------------------------------------------------------===//
-
-#include "clang/AST/Decl.h"
-#include "Linkage.h"
-#include "clang/AST/ASTContext.h"
-#include "clang/AST/ASTDiagnostic.h"
-#include "clang/AST/ASTLambda.h"
-#include "clang/AST/ASTMutationListener.h"
-#include "clang/AST/CanonicalType.h"
-#include "clang/AST/DeclBase.h"
-#include "clang/AST/DeclCXX.h"
-#include "clang/AST/DeclObjC.h"
-#include "clang/AST/DeclOpenMP.h"
-#include "clang/AST/DeclTemplate.h"
-#include "clang/AST/DeclarationName.h"
-#include "clang/AST/Expr.h"
-#include "clang/AST/ExprCXX.h"
-#include "clang/AST/ExternalASTSource.h"
-#include "clang/AST/ODRHash.h"
-#include "clang/AST/PrettyDeclStackTrace.h"
-#include "clang/AST/PrettyPrinter.h"
-#include "clang/AST/Redeclarable.h"
-#include "clang/AST/Stmt.h"
-#include "clang/AST/TemplateBase.h"
-#include "clang/AST/Type.h"
-#include "clang/AST/TypeLoc.h"
-#include "clang/Basic/Builtins.h"
-#include "clang/Basic/IdentifierTable.h"
-#include "clang/Basic/LLVM.h"
-#include "clang/Basic/LangOptions.h"
-#include "clang/Basic/Linkage.h"
-#include "clang/Basic/Module.h"
-#include "clang/Basic/PartialDiagnostic.h"
-#include "clang/Basic/SanitizerBlacklist.h"
-#include "clang/Basic/Sanitizers.h"
-#include "clang/Basic/SourceLocation.h"
-#include "clang/Basic/SourceManager.h"
-#include "clang/Basic/Specifiers.h"
-#include "clang/Basic/TargetCXXABI.h"
-#include "clang/Basic/TargetInfo.h"
-#include "clang/Basic/Visibility.h"
-#include "llvm/ADT/APSInt.h"
-#include "llvm/ADT/ArrayRef.h"
-#include "llvm/ADT/None.h"
-#include "llvm/ADT/Optional.h"
-#include "llvm/ADT/STLExtras.h"
-#include "llvm/ADT/SmallVector.h"
-#include "llvm/ADT/StringSwitch.h"
-#include "llvm/ADT/StringRef.h"
-#include "llvm/ADT/Triple.h"
-#include "llvm/Support/Casting.h"
-#include "llvm/Support/ErrorHandling.h"
-#include "llvm/Support/raw_ostream.h"
-#include <algorithm>
-#include <cassert>
-#include <cstddef>
-#include <cstring>
-#include <memory>
-#include <string>
-#include <tuple>
-#include <type_traits>
-
-using namespace clang;
-
-Decl *clang::getPrimaryMergedDecl(Decl *D) {
-  return D->getASTContext().getPrimaryMergedDecl(D);
-}
-
-void PrettyDeclStackTraceEntry::print(raw_ostream &OS) const {
-  SourceLocation Loc = this->Loc;
-  if (!Loc.isValid() && TheDecl) Loc = TheDecl->getLocation();
-  if (Loc.isValid()) {
-    Loc.print(OS, Context.getSourceManager());
-    OS << ": ";
-  }
-  OS << Message;
-
-  if (auto *ND = dyn_cast_or_null<NamedDecl>(TheDecl)) {
-    OS << " '";
-    ND->getNameForDiagnostic(OS, Context.getPrintingPolicy(), true);
-    OS << "'";
-  }
-
-  OS << '\n';
-}
-
-// Defined here so that it can be inlined into its direct callers.
-bool Decl::isOutOfLine() const {
-  return !getLexicalDeclContext()->Equals(getDeclContext());
-}
-
-TranslationUnitDecl::TranslationUnitDecl(ASTContext &ctx)
-    : Decl(TranslationUnit, nullptr, SourceLocation()),
-      DeclContext(TranslationUnit), Ctx(ctx) {}
-
-//===----------------------------------------------------------------------===//
-// NamedDecl Implementation
-//===----------------------------------------------------------------------===//
-
-// Visibility rules aren't rigorously externally specified, but here
-// are the basic principles behind what we implement:
-//
-// 1. An explicit visibility attribute is generally a direct expression
-// of the user's intent and should be honored.  Only the innermost
-// visibility attribute applies.  If no visibility attribute applies,
-// global visibility settings are considered.
-//
-// 2. There is one caveat to the above: on or in a template pattern,
-// an explicit visibility attribute is just a default rule, and
-// visibility can be decreased by the visibility of template
-// arguments.  But this, too, has an exception: an attribute on an
-// explicit specialization or instantiation causes all the visibility
-// restrictions of the template arguments to be ignored.
-//
-// 3. A variable that does not otherwise have explicit visibility can
-// be restricted by the visibility of its type.
-//
-// 4. A visibility restriction is explicit if it comes from an
-// attribute (or something like it), not a global visibility setting.
-// When emitting a reference to an external symbol, visibility
-// restrictions are ignored unless they are explicit.
-//
-// 5. When computing the visibility of a non-type, including a
-// non-type member of a class, only non-type visibility restrictions
-// are considered: the 'visibility' attribute, global value-visibility
-// settings, and a few special cases like __private_extern.
-//
-// 6. When computing the visibility of a type, including a type member
-// of a class, only type visibility restrictions are considered:
-// the 'type_visibility' attribute and global type-visibility settings.
-// However, a 'visibility' attribute counts as a 'type_visibility'
-// attribute on any declaration that only has the former.
-//
-// The visibility of a "secondary" entity, like a template argument,
-// is computed using the kind of that entity, not the kind of the
-// primary entity for which we are computing visibility.  For example,
-// the visibility of a specialization of either of these templates:
-//   template <class T, bool (&compare)(T, X)> bool has_match(list<T>, X);
-//   template <class T, bool (&compare)(T, X)> class matcher;
-// is restricted according to the type visibility of the argument 'T',
-// the type visibility of 'bool(&)(T,X)', and the value visibility of
-// the argument function 'compare'.  That 'has_match' is a value
-// and 'matcher' is a type only matters when looking for attributes
-// and settings from the immediate context.
-
-/// Does this computation kind permit us to consider additional
-/// visibility settings from attributes and the like?
-static bool hasExplicitVisibilityAlready(LVComputationKind computation) {
-  return computation.IgnoreExplicitVisibility;
-}
-
-/// Given an LVComputationKind, return one of the same type/value sort
-/// that records that it already has explicit visibility.
-static LVComputationKind
-withExplicitVisibilityAlready(LVComputationKind Kind) {
-  Kind.IgnoreExplicitVisibility = true;
-  return Kind;
-}
-
-static Optional<Visibility> getExplicitVisibility(const NamedDecl *D,
-                                                  LVComputationKind kind) {
-  assert(!kind.IgnoreExplicitVisibility &&
-         "asking for explicit visibility when we shouldn't be");
-  return D->getExplicitVisibility(kind.getExplicitVisibilityKind());
-}
-
-/// Is the given declaration a "type" or a "value" for the purposes of
-/// visibility computation?
-static bool usesTypeVisibility(const NamedDecl *D) {
-  return isa<TypeDecl>(D) ||
-         isa<ClassTemplateDecl>(D) ||
-         isa<ObjCInterfaceDecl>(D);
-}
-
-/// Does the given declaration have member specialization information,
-/// and if so, is it an explicit specialization?
-template <class T> static typename
-std::enable_if<!std::is_base_of<RedeclarableTemplateDecl, T>::value, bool>::type
-isExplicitMemberSpecialization(const T *D) {
-  if (const MemberSpecializationInfo *member =
-        D->getMemberSpecializationInfo()) {
-    return member->isExplicitSpecialization();
-  }
-  return false;
-}
-
-/// For templates, this question is easier: a member template can't be
-/// explicitly instantiated, so there's a single bit indicating whether
-/// or not this is an explicit member specialization.
-static bool isExplicitMemberSpecialization(const RedeclarableTemplateDecl *D) {
-  return D->isMemberSpecialization();
-}
-
-/// Given a visibility attribute, return the explicit visibility
-/// associated with it.
-template <class T>
-static Visibility getVisibilityFromAttr(const T *attr) {
-  switch (attr->getVisibility()) {
-  case T::Default:
-    return DefaultVisibility;
-  case T::Hidden:
-    return HiddenVisibility;
-  case T::Protected:
-    return ProtectedVisibility;
-  }
-  llvm_unreachable("bad visibility kind");
-}
-
-/// Return the explicit visibility of the given declaration.
-static Optional<Visibility> getVisibilityOf(const NamedDecl *D,
-                                    NamedDecl::ExplicitVisibilityKind kind) {
-  // If we're ultimately computing the visibility of a type, look for
-  // a 'type_visibility' attribute before looking for 'visibility'.
-  if (kind == NamedDecl::VisibilityForType) {
-    if (const auto *A = D->getAttr<TypeVisibilityAttr>()) {
-      return getVisibilityFromAttr(A);
-    }
-  }
-
-  // If this declaration has an explicit visibility attribute, use it.
-  if (const auto *A = D->getAttr<VisibilityAttr>()) {
-    return getVisibilityFromAttr(A);
-  }
-
-  return None;
-}
-
-LinkageInfo LinkageComputer::getLVForType(const Type &T,
-                                          LVComputationKind computation) {
-  if (computation.IgnoreAllVisibility)
-    return LinkageInfo(T.getLinkage(), DefaultVisibility, true);
-  return getTypeLinkageAndVisibility(&T);
-}
-
-/// Get the most restrictive linkage for the types in the given
-/// template parameter list.  For visibility purposes, template
-/// parameters are part of the signature of a template.
-LinkageInfo LinkageComputer::getLVForTemplateParameterList(
-    const TemplateParameterList *Params, LVComputationKind computation) {
-  LinkageInfo LV;
-  for (const NamedDecl *P : *Params) {
-    // Template type parameters are the most common and never
-    // contribute to visibility, pack or not.
-    if (isa<TemplateTypeParmDecl>(P))
-      continue;
-
-    // Non-type template parameters can be restricted by the value type, e.g.
-    //   template <enum X> class A { ... };
-    // We have to be careful here, though, because we can be dealing with
-    // dependent types.
-    if (const auto *NTTP = dyn_cast<NonTypeTemplateParmDecl>(P)) {
-      // Handle the non-pack case first.
-      if (!NTTP->isExpandedParameterPack()) {
-        if (!NTTP->getType()->isDependentType()) {
-          LV.merge(getLVForType(*NTTP->getType(), computation));
-        }
-        continue;
-      }
-
-      // Look at all the types in an expanded pack.
-      for (unsigned i = 0, n = NTTP->getNumExpansionTypes(); i != n; ++i) {
-        QualType type = NTTP->getExpansionType(i);
-        if (!type->isDependentType())
-          LV.merge(getTypeLinkageAndVisibility(type));
-      }
-      continue;
-    }
-
-    // Template template parameters can be restricted by their
-    // template parameters, recursively.
-    const auto *TTP = cast<TemplateTemplateParmDecl>(P);
-
-    // Handle the non-pack case first.
-    if (!TTP->isExpandedParameterPack()) {
-      LV.merge(getLVForTemplateParameterList(TTP->getTemplateParameters(),
-                                             computation));
-      continue;
-    }
-
-    // Look at all expansions in an expanded pack.
-    for (unsigned i = 0, n = TTP->getNumExpansionTemplateParameters();
-           i != n; ++i) {
-      LV.merge(getLVForTemplateParameterList(
-          TTP->getExpansionTemplateParameters(i), computation));
-    }
-  }
-
-  return LV;
-}
-
-static const Decl *getOutermostFuncOrBlockContext(const Decl *D) {
-  const Decl *Ret = nullptr;
-  const DeclContext *DC = D->getDeclContext();
-  while (DC->getDeclKind() != Decl::TranslationUnit) {
-    if (isa<FunctionDecl>(DC) || isa<BlockDecl>(DC))
-      Ret = cast<Decl>(DC);
-    DC = DC->getParent();
-  }
-  return Ret;
-}
-
-/// Get the most restrictive linkage for the types and
-/// declarations in the given template argument list.
-///
-/// Note that we don't take an LVComputationKind because we always
-/// want to honor the visibility of template arguments in the same way.
-LinkageInfo
-LinkageComputer::getLVForTemplateArgumentList(ArrayRef<TemplateArgument> Args,
-                                              LVComputationKind computation) {
-  LinkageInfo LV;
-
-  for (const TemplateArgument &Arg : Args) {
-    switch (Arg.getKind()) {
-    case TemplateArgument::Null:
-    case TemplateArgument::Integral:
-    case TemplateArgument::Expression:
-      continue;
-
-    case TemplateArgument::Type:
-      LV.merge(getLVForType(*Arg.getAsType(), computation));
-      continue;
-
-    case TemplateArgument::Declaration: {
-      const NamedDecl *ND = Arg.getAsDecl();
-      assert(!usesTypeVisibility(ND));
-      LV.merge(getLVForDecl(ND, computation));
-      continue;
-    }
-
-    case TemplateArgument::NullPtr:
-      LV.merge(getTypeLinkageAndVisibility(Arg.getNullPtrType()));
-      continue;
-
-    case TemplateArgument::Template:
-    case TemplateArgument::TemplateExpansion:
-      if (TemplateDecl *Template =
-              Arg.getAsTemplateOrTemplatePattern().getAsTemplateDecl())
-        LV.merge(getLVForDecl(Template, computation));
-      continue;
-
-    case TemplateArgument::Pack:
-      LV.merge(getLVForTemplateArgumentList(Arg.getPackAsArray(), computation));
-      continue;
-    }
-    llvm_unreachable("bad template argument kind");
-  }
-
-  return LV;
-}
-
-LinkageInfo
-LinkageComputer::getLVForTemplateArgumentList(const TemplateArgumentList &TArgs,
-                                              LVComputationKind computation) {
-  return getLVForTemplateArgumentList(TArgs.asArray(), computation);
-}
-
-static bool shouldConsiderTemplateVisibility(const FunctionDecl *fn,
-                        const FunctionTemplateSpecializationInfo *specInfo) {
-  // Include visibility from the template parameters and arguments
-  // only if this is not an explicit instantiation or specialization
-  // with direct explicit visibility.  (Implicit instantiations won't
-  // have a direct attribute.)
-  if (!specInfo->isExplicitInstantiationOrSpecialization())
-    return true;
-
-  return !fn->hasAttr<VisibilityAttr>();
-}
-
-/// Merge in template-related linkage and visibility for the given
-/// function template specialization.
-///
-/// We don't need a computation kind here because we can assume
-/// LVForValue.
-///
-/// \param[out] LV the computation to use for the parent
-void LinkageComputer::mergeTemplateLV(
-    LinkageInfo &LV, const FunctionDecl *fn,
-    const FunctionTemplateSpecializationInfo *specInfo,
-    LVComputationKind computation) {
-  bool considerVisibility =
-    shouldConsiderTemplateVisibility(fn, specInfo);
-
-  // Merge information from the template parameters.
-  FunctionTemplateDecl *temp = specInfo->getTemplate();
-  LinkageInfo tempLV =
-    getLVForTemplateParameterList(temp->getTemplateParameters(), computation);
-  LV.mergeMaybeWithVisibility(tempLV, considerVisibility);
-
-  // Merge information from the template arguments.
-  const TemplateArgumentList &templateArgs = *specInfo->TemplateArguments;
-  LinkageInfo argsLV = getLVForTemplateArgumentList(templateArgs, computation);
-  LV.mergeMaybeWithVisibility(argsLV, considerVisibility);
-}
-
-/// Does the given declaration have a direct visibility attribute
-/// that would match the given rules?
-static bool hasDirectVisibilityAttribute(const NamedDecl *D,
-                                         LVComputationKind computation) {
-  if (computation.IgnoreAllVisibility)
-    return false;
-
-  return (computation.isTypeVisibility() && D->hasAttr<TypeVisibilityAttr>()) ||
-         D->hasAttr<VisibilityAttr>();
-}
-
-/// Should we consider visibility associated with the template
-/// arguments and parameters of the given class template specialization?
-static bool shouldConsiderTemplateVisibility(
-                                 const ClassTemplateSpecializationDecl *spec,
-                                 LVComputationKind computation) {
-  // Include visibility from the template parameters and arguments
-  // only if this is not an explicit instantiation or specialization
-  // with direct explicit visibility (and note that implicit
-  // instantiations won't have a direct attribute).
-  //
-  // Furthermore, we want to ignore template parameters and arguments
-  // for an explicit specialization when computing the visibility of a
-  // member thereof with explicit visibility.
-  //
-  // This is a bit complex; let's unpack it.
-  //
-  // An explicit class specialization is an independent, top-level
-  // declaration.  As such, if it or any of its members has an
-  // explicit visibility attribute, that must directly express the
-  // user's intent, and we should honor it.  The same logic applies to
-  // an explicit instantiation of a member of such a thing.
-
-  // Fast path: if this is not an explicit instantiation or
-  // specialization, we always want to consider template-related
-  // visibility restrictions.
-  if (!spec->isExplicitInstantiationOrSpecialization())
-    return true;
-
-  // This is the 'member thereof' check.
-  if (spec->isExplicitSpecialization() &&
-      hasExplicitVisibilityAlready(computation))
-    return false;
-
-  return !hasDirectVisibilityAttribute(spec, computation);
-}
-
-/// Merge in template-related linkage and visibility for the given
-/// class template specialization.
-void LinkageComputer::mergeTemplateLV(
-    LinkageInfo &LV, const ClassTemplateSpecializationDecl *spec,
-    LVComputationKind computation) {
-  bool considerVisibility = shouldConsiderTemplateVisibility(spec, computation);
-
-  // Merge information from the template parameters, but ignore
-  // visibility if we're only considering template arguments.
-
-  ClassTemplateDecl *temp = spec->getSpecializedTemplate();
-  LinkageInfo tempLV =
-    getLVForTemplateParameterList(temp->getTemplateParameters(), computation);
-  LV.mergeMaybeWithVisibility(tempLV,
-           considerVisibility && !hasExplicitVisibilityAlready(computation));
-
-  // Merge information from the template arguments.  We ignore
-  // template-argument visibility if we've got an explicit
-  // instantiation with a visibility attribute.
-  const TemplateArgumentList &templateArgs = spec->getTemplateArgs();
-  LinkageInfo argsLV = getLVForTemplateArgumentList(templateArgs, computation);
-  if (considerVisibility)
-    LV.mergeVisibility(argsLV);
-  LV.mergeExternalVisibility(argsLV);
-}
-
-/// Should we consider visibility associated with the template
-/// arguments and parameters of the given variable template
-/// specialization? As usual, follow class template specialization
-/// logic up to initialization.
-static bool shouldConsiderTemplateVisibility(
-                                 const VarTemplateSpecializationDecl *spec,
-                                 LVComputationKind computation) {
-  // Include visibility from the template parameters and arguments
-  // only if this is not an explicit instantiation or specialization
-  // with direct explicit visibility (and note that implicit
-  // instantiations won't have a direct attribute).
-  if (!spec->isExplicitInstantiationOrSpecialization())
-    return true;
-
-  // An explicit variable specialization is an independent, top-level
-  // declaration.  As such, if it has an explicit visibility attribute,
-  // that must directly express the user's intent, and we should honor
-  // it.
-  if (spec->isExplicitSpecialization() &&
-      hasExplicitVisibilityAlready(computation))
-    return false;
-
-  return !hasDirectVisibilityAttribute(spec, computation);
-}
-
-/// Merge in template-related linkage and visibility for the given
-/// variable template specialization. As usual, follow class template
-/// specialization logic up to initialization.
-void LinkageComputer::mergeTemplateLV(LinkageInfo &LV,
-                                      const VarTemplateSpecializationDecl *spec,
-                                      LVComputationKind computation) {
-  bool considerVisibility = shouldConsiderTemplateVisibility(spec, computation);
-
-  // Merge information from the template parameters, but ignore
-  // visibility if we're only considering template arguments.
-
-  VarTemplateDecl *temp = spec->getSpecializedTemplate();
-  LinkageInfo tempLV =
-    getLVForTemplateParameterList(temp->getTemplateParameters(), computation);
-  LV.mergeMaybeWithVisibility(tempLV,
-           considerVisibility && !hasExplicitVisibilityAlready(computation));
-
-  // Merge information from the template arguments.  We ignore
-  // template-argument visibility if we've got an explicit
-  // instantiation with a visibility attribute.
-  const TemplateArgumentList &templateArgs = spec->getTemplateArgs();
-  LinkageInfo argsLV = getLVForTemplateArgumentList(templateArgs, computation);
-  if (considerVisibility)
-    LV.mergeVisibility(argsLV);
-  LV.mergeExternalVisibility(argsLV);
-}
-
-static bool useInlineVisibilityHidden(const NamedDecl *D) {
-  // FIXME: we should warn if -fvisibility-inlines-hidden is used with c.
-  const LangOptions &Opts = D->getASTContext().getLangOpts();
-  if (!Opts.CPlusPlus || !Opts.InlineVisibilityHidden)
-    return false;
-
-  const auto *FD = dyn_cast<FunctionDecl>(D);
-  if (!FD)
-    return false;
-
-  TemplateSpecializationKind TSK = TSK_Undeclared;
-  if (FunctionTemplateSpecializationInfo *spec
-      = FD->getTemplateSpecializationInfo()) {
-    TSK = spec->getTemplateSpecializationKind();
-  } else if (MemberSpecializationInfo *MSI =
-             FD->getMemberSpecializationInfo()) {
-    TSK = MSI->getTemplateSpecializationKind();
-  }
-
-  const FunctionDecl *Def = nullptr;
-  // InlineVisibilityHidden only applies to definitions, and
-  // isInlined() only gives meaningful answers on definitions
-  // anyway.
-  return TSK != TSK_ExplicitInstantiationDeclaration &&
-    TSK != TSK_ExplicitInstantiationDefinition &&
-    FD->hasBody(Def) && Def->isInlined() && !Def->hasAttr<GNUInlineAttr>();
-}
-
-template <typename T> static bool isFirstInExternCContext(T *D) {
-  const T *First = D->getFirstDecl();
-  return First->isInExternCContext();
-}
-
-static bool isSingleLineLanguageLinkage(const Decl &D) {
-  if (const auto *SD = dyn_cast<LinkageSpecDecl>(D.getDeclContext()))
-    if (!SD->hasBraces())
-      return true;
-  return false;
-}
-
-static bool isExportedFromModuleIntefaceUnit(const NamedDecl *D) {
-  // FIXME: Handle isModulePrivate.
-  switch (D->getModuleOwnershipKind()) {
-  case Decl::ModuleOwnershipKind::Unowned:
-  case Decl::ModuleOwnershipKind::ModulePrivate:
-    return false;
-  case Decl::ModuleOwnershipKind::Visible:
-  case Decl::ModuleOwnershipKind::VisibleWhenImported:
-    if (auto *M = D->getOwningModule())
-      return M->Kind == Module::ModuleInterfaceUnit;
-  }
-  llvm_unreachable("unexpected module ownership kind");
-}
-
-static LinkageInfo getInternalLinkageFor(const NamedDecl *D) {
-  // Internal linkage declarations within a module interface unit are modeled
-  // as "module-internal linkage", which means that they have internal linkage
-  // formally but can be indirectly accessed from outside the module via inline
-  // functions and templates defined within the module.
-  if (auto *M = D->getOwningModule())
-    if (M->Kind == Module::ModuleInterfaceUnit)
-      return LinkageInfo(ModuleInternalLinkage, DefaultVisibility, false);
-
-  return LinkageInfo::internal();
-}
-
-static LinkageInfo getExternalLinkageFor(const NamedDecl *D) {
-  // C++ Modules TS [basic.link]/6.8:
-  //   - A name declared at namespace scope that does not have internal linkage
-  //     by the previous rules and that is introduced by a non-exported
-  //     declaration has module linkage.
-  if (auto *M = D->getOwningModule())
-    if (M->Kind == Module::ModuleInterfaceUnit)
-      if (!isExportedFromModuleIntefaceUnit(
-              cast<NamedDecl>(D->getCanonicalDecl())))
-        return LinkageInfo(ModuleLinkage, DefaultVisibility, false);
-
-  return LinkageInfo::external();
-}
-
-LinkageInfo
-LinkageComputer::getLVForNamespaceScopeDecl(const NamedDecl *D,
-                                            LVComputationKind computation,
-                                            bool IgnoreVarTypeLinkage) {
-  assert(D->getDeclContext()->getRedeclContext()->isFileContext() &&
-         "Not a name having namespace scope");
-  ASTContext &Context = D->getASTContext();
-
-  // C++ [basic.link]p3:
-  //   A name having namespace scope (3.3.6) has internal linkage if it
-  //   is the name of
-  //     - an object, reference, function or function template that is
-  //       explicitly declared static; or,
-  // (This bullet corresponds to C99 6.2.2p3.)
-  if (const auto *Var = dyn_cast<VarDecl>(D)) {
-    // Explicitly declared static.
-    if (Var->getStorageClass() == SC_Static)
-      return getInternalLinkageFor(Var);
-
-    // - a non-inline, non-volatile object or reference that is explicitly
-    //   declared const or constexpr and neither explicitly declared extern
-    //   nor previously declared to have external linkage; or (there is no
-    //   equivalent in C99)
-    // The C++ modules TS adds "non-exported" to this list.
-    if (Context.getLangOpts().CPlusPlus &&
-        Var->getType().isConstQualified() &&
-        !Var->getType().isVolatileQualified() &&
-        !Var->isInline() &&
-        !isExportedFromModuleIntefaceUnit(Var)) {
-      const VarDecl *PrevVar = Var->getPreviousDecl();
-      if (PrevVar)
-        return getLVForDecl(PrevVar, computation);
-
-      if (Var->getStorageClass() != SC_Extern &&
-          Var->getStorageClass() != SC_PrivateExtern &&
-          !isSingleLineLanguageLinkage(*Var))
-        return getInternalLinkageFor(Var);
-    }
-
-    for (const VarDecl *PrevVar = Var->getPreviousDecl(); PrevVar;
-         PrevVar = PrevVar->getPreviousDecl()) {
-      if (PrevVar->getStorageClass() == SC_PrivateExtern &&
-          Var->getStorageClass() == SC_None)
-        return getDeclLinkageAndVisibility(PrevVar);
-      // Explicitly declared static.
-      if (PrevVar->getStorageClass() == SC_Static)
-        return getInternalLinkageFor(Var);
-    }
-  } else if (const FunctionDecl *Function = D->getAsFunction()) {
-    // C++ [temp]p4:
-    //   A non-member function template can have internal linkage; any
-    //   other template name shall have external linkage.
-
-    // Explicitly declared static.
-    if (Function->getCanonicalDecl()->getStorageClass() == SC_Static)
-      return getInternalLinkageFor(Function);
-  } else if (const auto *IFD = dyn_cast<IndirectFieldDecl>(D)) {
-    //   - a data member of an anonymous union.
-    const VarDecl *VD = IFD->getVarDecl();
-    assert(VD && "Expected a VarDecl in this IndirectFieldDecl!");
-    return getLVForNamespaceScopeDecl(VD, computation, IgnoreVarTypeLinkage);
-  }
-  assert(!isa<FieldDecl>(D) && "Didn't expect a FieldDecl!");
-
-  if (D->isInAnonymousNamespace()) {
-    const auto *Var = dyn_cast<VarDecl>(D);
-    const auto *Func = dyn_cast<FunctionDecl>(D);
-    // FIXME: The check for extern "C" here is not justified by the standard
-    // wording, but we retain it from the pre-DR1113 model to avoid breaking
-    // code.
-    //
-    // C++11 [basic.link]p4:
-    //   An unnamed namespace or a namespace declared directly or indirectly
-    //   within an unnamed namespace has internal linkage.
-    if ((!Var || !isFirstInExternCContext(Var)) &&
-        (!Func || !isFirstInExternCContext(Func)))
-      return getInternalLinkageFor(D);
-  }
-
-  // Set up the defaults.
-
-  // C99 6.2.2p5:
-  //   If the declaration of an identifier for an object has file
-  //   scope and no storage-class specifier, its linkage is
-  //   external.
-  LinkageInfo LV = getExternalLinkageFor(D);
-
-  if (!hasExplicitVisibilityAlready(computation)) {
-    if (Optional<Visibility> Vis = getExplicitVisibility(D, computation)) {
-      LV.mergeVisibility(*Vis, true);
-    } else {
-      // If we're declared in a namespace with a visibility attribute,
-      // use that namespace's visibility, and it still counts as explicit.
-      for (const DeclContext *DC = D->getDeclContext();
-           !isa<TranslationUnitDecl>(DC);
-           DC = DC->getParent()) {
-        const auto *ND = dyn_cast<NamespaceDecl>(DC);
-        if (!ND) continue;
-        if (Optional<Visibility> Vis = getExplicitVisibility(ND, computation)) {
-          LV.mergeVisibility(*Vis, true);
-          break;
-        }
-      }
-    }
-
-    // Add in global settings if the above didn't give us direct visibility.
-    if (!LV.isVisibilityExplicit()) {
-      // Use global type/value visibility as appropriate.
-      Visibility globalVisibility =
-          computation.isValueVisibility()
-              ? Context.getLangOpts().getValueVisibilityMode()
-              : Context.getLangOpts().getTypeVisibilityMode();
-      LV.mergeVisibility(globalVisibility, /*explicit*/ false);
-
-      // If we're paying attention to global visibility, apply
-      // -finline-visibility-hidden if this is an inline method.
-      if (useInlineVisibilityHidden(D))
-        LV.mergeVisibility(HiddenVisibility, /*visibilityExplicit=*/false);
-    }
-  }
-
-  // C++ [basic.link]p4:
-
-  //   A name having namespace scope has external linkage if it is the
-  //   name of
-  //
-  //     - an object or reference, unless it has internal linkage; or
-  if (const auto *Var = dyn_cast<VarDecl>(D)) {
-    // GCC applies the following optimization to variables and static
-    // data members, but not to functions:
-    //
-    // Modify the variable's LV by the LV of its type unless this is
-    // C or extern "C".  This follows from [basic.link]p9:
-    //   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, or
-    //    - the entity is declared within an unnamed namespace, or
-    //    - the entity is not used or is defined in the same
-    //      translation unit.
-    // and [basic.link]p10:
-    //   ...the types specified by all declarations referring to a
-    //   given variable or function shall be identical...
-    // C does not have an equivalent rule.
-    //
-    // Ignore this if we've got an explicit attribute;  the user
-    // probably knows what they're doing.
-    //
-    // Note that we don't want to make the variable non-external
-    // because of this, but unique-external linkage suits us.
-    if (Context.getLangOpts().CPlusPlus && !isFirstInExternCContext(Var) &&
-        !IgnoreVarTypeLinkage) {
-      LinkageInfo TypeLV = getLVForType(*Var->getType(), computation);
-      if (!isExternallyVisible(TypeLV.getLinkage()))
-        return LinkageInfo::uniqueExternal();
-      if (!LV.isVisibilityExplicit())
-        LV.mergeVisibility(TypeLV);
-    }
-
-    if (Var->getStorageClass() == SC_PrivateExtern)
-      LV.mergeVisibility(HiddenVisibility, true);
-
-    // Note that Sema::MergeVarDecl already takes care of implementing
-    // C99 6.2.2p4 and propagating the visibility attribute, so we don't have
-    // to do it here.
-
-    // As per function and class template specializations (below),
-    // consider LV for the template and template arguments.  We're at file
-    // scope, so we do not need to worry about nested specializations.
-    if (const auto *spec = dyn_cast<VarTemplateSpecializationDecl>(Var)) {
-      mergeTemplateLV(LV, spec, computation);
-    }
-
-  //     - a function, unless it has internal linkage; or
-  } else if (const auto *Function = dyn_cast<FunctionDecl>(D)) {
-    // In theory, we can modify the function's LV by the LV of its
-    // type unless it has C linkage (see comment above about variables
-    // for justification).  In practice, GCC doesn't do this, so it's
-    // just too painful to make work.
-
-    if (Function->getStorageClass() == SC_PrivateExtern)
-      LV.mergeVisibility(HiddenVisibility, true);
-
-    // Note that Sema::MergeCompatibleFunctionDecls already takes care of
-    // merging storage classes and visibility attributes, so we don't have to
-    // look at previous decls in here.
-
-    // In C++, then if the type of the function uses a type with
-    // unique-external linkage, it's not legally usable from outside
-    // this translation unit.  However, we should use the C linkage
-    // rules instead for extern "C" declarations.
-    if (Context.getLangOpts().CPlusPlus && !isFirstInExternCContext(Function)) {
-      // Only look at the type-as-written. Otherwise, deducing the return type
-      // of a function could change its linkage.
-      QualType TypeAsWritten = Function->getType();
-      if (TypeSourceInfo *TSI = Function->getTypeSourceInfo())
-        TypeAsWritten = TSI->getType();
-      if (!isExternallyVisible(TypeAsWritten->getLinkage()))
-        return LinkageInfo::uniqueExternal();
-    }
-
-    // Consider LV from the template and the template arguments.
-    // We're at file scope, so we do not need to worry about nested
-    // specializations.
-    if (FunctionTemplateSpecializationInfo *specInfo
-                               = Function->getTemplateSpecializationInfo()) {
-      mergeTemplateLV(LV, Function, specInfo, computation);
-    }
-
-  //     - a named class (Clause 9), or an unnamed class defined in a
-  //       typedef declaration in which the class has the typedef name
-  //       for linkage purposes (7.1.3); or
-  //     - a named enumeration (7.2), or an unnamed enumeration
-  //       defined in a typedef declaration in which the enumeration
-  //       has the typedef name for linkage purposes (7.1.3); or
-  } else if (const auto *Tag = dyn_cast<TagDecl>(D)) {
-    // Unnamed tags have no linkage.
-    if (!Tag->hasNameForLinkage())
-      return LinkageInfo::none();
-
-    // If this is a class template specialization, consider the
-    // linkage of the template and template arguments.  We're at file
-    // scope, so we do not need to worry about nested specializations.
-    if (const auto *spec = dyn_cast<ClassTemplateSpecializationDecl>(Tag)) {
-      mergeTemplateLV(LV, spec, computation);
-    }
-
-  //     - an enumerator belonging to an enumeration with external linkage;
-  } else if (isa<EnumConstantDecl>(D)) {
-    LinkageInfo EnumLV = getLVForDecl(cast<NamedDecl>(D->getDeclContext()),
-                                      computation);
-    if (!isExternalFormalLinkage(EnumLV.getLinkage()))
-      return LinkageInfo::none();
-    LV.merge(EnumLV);
-
-  //     - a template, unless it is a function template that has
-  //       internal linkage (Clause 14);
-  } else if (const auto *temp = dyn_cast<TemplateDecl>(D)) {
-    bool considerVisibility = !hasExplicitVisibilityAlready(computation);
-    LinkageInfo tempLV =
-      getLVForTemplateParameterList(temp->getTemplateParameters(), computation);
-    LV.mergeMaybeWithVisibility(tempLV, considerVisibility);
-
-  //     - a namespace (7.3), unless it is declared within an unnamed
-  //       namespace.
-  //
-  // We handled names in anonymous namespaces above.
-  } else if (isa<NamespaceDecl>(D)) {
-    return LV;
-
-  // By extension, we assign external linkage to Objective-C
-  // interfaces.
-  } else if (isa<ObjCInterfaceDecl>(D)) {
-    // fallout
-
-  } else if (auto *TD = dyn_cast<TypedefNameDecl>(D)) {
-    // A typedef declaration has linkage if it gives a type a name for
-    // linkage purposes.
-    if (!TD->getAnonDeclWithTypedefName(/*AnyRedecl*/true))
-      return LinkageInfo::none();
-
-  // Everything not covered here has no linkage.
-  } else {
-    return LinkageInfo::none();
-  }
-
-  // If we ended up with non-externally-visible linkage, visibility should
-  // always be default.
-  if (!isExternallyVisible(LV.getLinkage()))
-    return LinkageInfo(LV.getLinkage(), DefaultVisibility, false);
-
-  return LV;
-}
-
-LinkageInfo
-LinkageComputer::getLVForClassMember(const NamedDecl *D,
-                                     LVComputationKind computation,
-                                     bool IgnoreVarTypeLinkage) {
-  // Only certain class members have linkage.  Note that fields don't
-  // really have linkage, but it's convenient to say they do for the
-  // purposes of calculating linkage of pointer-to-data-member
-  // template arguments.
-  //
-  // Templates also don't officially have linkage, but since we ignore
-  // the C++ standard and look at template arguments when determining
-  // linkage and visibility of a template specialization, we might hit
-  // a template template argument that way. If we do, we need to
-  // consider its linkage.
-  if (!(isa<CXXMethodDecl>(D) ||
-        isa<VarDecl>(D) ||
-        isa<FieldDecl>(D) ||
-        isa<IndirectFieldDecl>(D) ||
-        isa<TagDecl>(D) ||
-        isa<TemplateDecl>(D)))
-    return LinkageInfo::none();
-
-  LinkageInfo LV;
-
-  // If we have an explicit visibility attribute, merge that in.
-  if (!hasExplicitVisibilityAlready(computation)) {
-    if (Optional<Visibility> Vis = getExplicitVisibility(D, computation))
-      LV.mergeVisibility(*Vis, true);
-    // If we're paying attention to global visibility, apply
-    // -finline-visibility-hidden if this is an inline method.
-    //
-    // Note that we do this before merging information about
-    // the class visibility.
-    if (!LV.isVisibilityExplicit() && useInlineVisibilityHidden(D))
-      LV.mergeVisibility(HiddenVisibility, /*visibilityExplicit=*/false);
-  }
-
-  // If this class member has an explicit visibility attribute, the only
-  // thing that can change its visibility is the template arguments, so
-  // only look for them when processing the class.
-  LVComputationKind classComputation = computation;
-  if (LV.isVisibilityExplicit())
-    classComputation = withExplicitVisibilityAlready(computation);
-
-  LinkageInfo classLV =
-    getLVForDecl(cast<RecordDecl>(D->getDeclContext()), classComputation);
-  // The member has the same linkage as the class. If that's not externally
-  // visible, we don't need to compute anything about the linkage.
-  // FIXME: If we're only computing linkage, can we bail out here?
-  if (!isExternallyVisible(classLV.getLinkage()))
-    return classLV;
-
-
-  // Otherwise, don't merge in classLV yet, because in certain cases
-  // we need to completely ignore the visibility from it.
-
-  // Specifically, if this decl exists and has an explicit attribute.
-  const NamedDecl *explicitSpecSuppressor = nullptr;
-
-  if (const auto *MD = dyn_cast<CXXMethodDecl>(D)) {
-    // Only look at the type-as-written. Otherwise, deducing the return type
-    // of a function could change its linkage.
-    QualType TypeAsWritten = MD->getType();
-    if (TypeSourceInfo *TSI = MD->getTypeSourceInfo())
-      TypeAsWritten = TSI->getType();
-    if (!isExternallyVisible(TypeAsWritten->getLinkage()))
-      return LinkageInfo::uniqueExternal();
-
-    // If this is a method template specialization, use the linkage for
-    // the template parameters and arguments.
-    if (FunctionTemplateSpecializationInfo *spec
-           = MD->getTemplateSpecializationInfo()) {
-      mergeTemplateLV(LV, MD, spec, computation);
-      if (spec->isExplicitSpecialization()) {
-        explicitSpecSuppressor = MD;
-      } else if (isExplicitMemberSpecialization(spec->getTemplate())) {
-        explicitSpecSuppressor = spec->getTemplate()->getTemplatedDecl();
-      }
-    } else if (isExplicitMemberSpecialization(MD)) {
-      explicitSpecSuppressor = MD;
-    }
-
-  } else if (const auto *RD = dyn_cast<CXXRecordDecl>(D)) {
-    if (const auto *spec = dyn_cast<ClassTemplateSpecializationDecl>(RD)) {
-      mergeTemplateLV(LV, spec, computation);
-      if (spec->isExplicitSpecialization()) {
-        explicitSpecSuppressor = spec;
-      } else {
-        const ClassTemplateDecl *temp = spec->getSpecializedTemplate();
-        if (isExplicitMemberSpecialization(temp)) {
-          explicitSpecSuppressor = temp->getTemplatedDecl();
-        }
-      }
-    } else if (isExplicitMemberSpecialization(RD)) {
-      explicitSpecSuppressor = RD;
-    }
-
-  // Static data members.
-  } else if (const auto *VD = dyn_cast<VarDecl>(D)) {
-    if (const auto *spec = dyn_cast<VarTemplateSpecializationDecl>(VD))
-      mergeTemplateLV(LV, spec, computation);
-
-    // Modify the variable's linkage by its type, but ignore the
-    // type's visibility unless it's a definition.
-    if (!IgnoreVarTypeLinkage) {
-      LinkageInfo typeLV = getLVForType(*VD->getType(), computation);
-      // FIXME: If the type's linkage is not externally visible, we can
-      // give this static data member UniqueExternalLinkage.
-      if (!LV.isVisibilityExplicit() && !classLV.isVisibilityExplicit())
-        LV.mergeVisibility(typeLV);
-      LV.mergeExternalVisibility(typeLV);
-    }
-
-    if (isExplicitMemberSpecialization(VD)) {
-      explicitSpecSuppressor = VD;
-    }
-
-  // Template members.
-  } else if (const auto *temp = dyn_cast<TemplateDecl>(D)) {
-    bool considerVisibility =
-      (!LV.isVisibilityExplicit() &&
-       !classLV.isVisibilityExplicit() &&
-       !hasExplicitVisibilityAlready(computation));
-    LinkageInfo tempLV =
-      getLVForTemplateParameterList(temp->getTemplateParameters(), computation);
-    LV.mergeMaybeWithVisibility(tempLV, considerVisibility);
-
-    if (const auto *redeclTemp = dyn_cast<RedeclarableTemplateDecl>(temp)) {
-      if (isExplicitMemberSpecialization(redeclTemp)) {
-        explicitSpecSuppressor = temp->getTemplatedDecl();
-      }
-    }
-  }
-
-  // We should never be looking for an attribute directly on a template.
-  assert(!explicitSpecSuppressor || !isa<TemplateDecl>(explicitSpecSuppressor));
-
-  // If this member is an explicit member specialization, and it has
-  // an explicit attribute, ignore visibility from the parent.
-  bool considerClassVisibility = true;
-  if (explicitSpecSuppressor &&
-      // optimization: hasDVA() is true only with explicit visibility.
-      LV.isVisibilityExplicit() &&
-      classLV.getVisibility() != DefaultVisibility &&
-      hasDirectVisibilityAttribute(explicitSpecSuppressor, computation)) {
-    considerClassVisibility = false;
-  }
-
-  // Finally, merge in information from the class.
-  LV.mergeMaybeWithVisibility(classLV, considerClassVisibility);
-  return LV;
-}
-
-void NamedDecl::anchor() {}
-
-bool NamedDecl::isLinkageValid() const {
-  if (!hasCachedLinkage())
-    return true;
-
-  Linkage L = LinkageComputer{}
-                  .computeLVForDecl(this, LVComputationKind::forLinkageOnly())
-                  .getLinkage();
-  return L == getCachedLinkage();
-}
-
-ObjCStringFormatFamily NamedDecl::getObjCFStringFormattingFamily() const {
-  StringRef name = getName();
-  if (name.empty()) return SFF_None;
-
-  if (name.front() == 'C')
-    if (name == "CFStringCreateWithFormat" ||
-        name == "CFStringCreateWithFormatAndArguments" ||
-        name == "CFStringAppendFormat" ||
-        name == "CFStringAppendFormatAndArguments")
-      return SFF_CFString;
-  return SFF_None;
-}
-
-Linkage NamedDecl::getLinkageInternal() const {
-  // We don't care about visibility here, so ask for the cheapest
-  // possible visibility analysis.
-  return LinkageComputer{}
-      .getLVForDecl(this, LVComputationKind::forLinkageOnly())
-      .getLinkage();
-}
-
-LinkageInfo NamedDecl::getLinkageAndVisibility() const {
-  return LinkageComputer{}.getDeclLinkageAndVisibility(this);
-}
-
-static Optional<Visibility>
-getExplicitVisibilityAux(const NamedDecl *ND,
-                         NamedDecl::ExplicitVisibilityKind kind,
-                         bool IsMostRecent) {
-  assert(!IsMostRecent || ND == ND->getMostRecentDecl());
-
-  // Check the declaration itself first.
-  if (Optional<Visibility> V = getVisibilityOf(ND, kind))
-    return V;
-
-  // If this is a member class of a specialization of a class template
-  // and the corresponding decl has explicit visibility, use that.
-  if (const auto *RD = dyn_cast<CXXRecordDecl>(ND)) {
-    CXXRecordDecl *InstantiatedFrom = RD->getInstantiatedFromMemberClass();
-    if (InstantiatedFrom)
-      return getVisibilityOf(InstantiatedFrom, kind);
-  }
-
-  // If there wasn't explicit visibility there, and this is a
-  // specialization of a class template, check for visibility
-  // on the pattern.
-  if (const auto *spec = dyn_cast<ClassTemplateSpecializationDecl>(ND)) {
-    // Walk all the template decl till this point to see if there are
-    // explicit visibility attributes.
-    const auto *TD = spec->getSpecializedTemplate()->getTemplatedDecl();
-    while (TD != nullptr) {
-      auto Vis = getVisibilityOf(TD, kind);
-      if (Vis != None)
-        return Vis;
-      TD = TD->getPreviousDecl();
-    }
-    return None;
-  }
-
-  // Use the most recent declaration.
-  if (!IsMostRecent && !isa<NamespaceDecl>(ND)) {
-    const NamedDecl *MostRecent = ND->getMostRecentDecl();
-    if (MostRecent != ND)
-      return getExplicitVisibilityAux(MostRecent, kind, true);
-  }
-
-  if (const auto *Var = dyn_cast<VarDecl>(ND)) {
-    if (Var->isStaticDataMember()) {
-      VarDecl *InstantiatedFrom = Var->getInstantiatedFromStaticDataMember();
-      if (InstantiatedFrom)
-        return getVisibilityOf(InstantiatedFrom, kind);
-    }
-
-    if (const auto *VTSD = dyn_cast<VarTemplateSpecializationDecl>(Var))
-      return getVisibilityOf(VTSD->getSpecializedTemplate()->getTemplatedDecl(),
-                             kind);
-
-    return None;
-  }
-  // Also handle function template specializations.
-  if (const auto *fn = dyn_cast<FunctionDecl>(ND)) {
-    // If the function is a specialization of a template with an
-    // explicit visibility attribute, use that.
-    if (FunctionTemplateSpecializationInfo *templateInfo
-          = fn->getTemplateSpecializationInfo())
-      return getVisibilityOf(templateInfo->getTemplate()->getTemplatedDecl(),
-                             kind);
-
-    // If the function is a member of a specialization of a class template
-    // and the corresponding decl has explicit visibility, use that.
-    FunctionDecl *InstantiatedFrom = fn->getInstantiatedFromMemberFunction();
-    if (InstantiatedFrom)
-      return getVisibilityOf(InstantiatedFrom, kind);
-
-    return None;
-  }
-
-  // The visibility of a template is stored in the templated decl.
-  if (const auto *TD = dyn_cast<TemplateDecl>(ND))
-    return getVisibilityOf(TD->getTemplatedDecl(), kind);
-
-  return None;
-}
-
-Optional<Visibility>
-NamedDecl::getExplicitVisibility(ExplicitVisibilityKind kind) const {
-  return getExplicitVisibilityAux(this, kind, false);
-}
-
-LinkageInfo LinkageComputer::getLVForClosure(const DeclContext *DC,
-                                             Decl *ContextDecl,
-                                             LVComputationKind computation) {
-  // This lambda has its linkage/visibility determined by its owner.
-  const NamedDecl *Owner;
-  if (!ContextDecl)
-    Owner = dyn_cast<NamedDecl>(DC);
-  else if (isa<ParmVarDecl>(ContextDecl))
-    Owner =
-        dyn_cast<NamedDecl>(ContextDecl->getDeclContext()->getRedeclContext());
-  else
-    Owner = cast<NamedDecl>(ContextDecl);
-
-  if (!Owner)
-    return LinkageInfo::none();
-
-  // If the owner has a deduced type, we need to skip querying the linkage and
-  // visibility of that type, because it might involve this closure type.  The
-  // only effect of this is that we might give a lambda VisibleNoLinkage rather
-  // than NoLinkage when we don't strictly need to, which is benign.
-  auto *VD = dyn_cast<VarDecl>(Owner);
-  LinkageInfo OwnerLV =
-      VD && VD->getType()->getContainedDeducedType()
-          ? computeLVForDecl(Owner, computation, /*IgnoreVarTypeLinkage*/true)
-          : getLVForDecl(Owner, computation);
-
-  // A lambda never formally has linkage. But if the owner is externally
-  // visible, then the lambda is too. We apply the same rules to blocks.
-  if (!isExternallyVisible(OwnerLV.getLinkage()))
-    return LinkageInfo::none();
-  return LinkageInfo(VisibleNoLinkage, OwnerLV.getVisibility(),
-                     OwnerLV.isVisibilityExplicit());
-}
-
-LinkageInfo LinkageComputer::getLVForLocalDecl(const NamedDecl *D,
-                                               LVComputationKind computation) {
-  if (const auto *Function = dyn_cast<FunctionDecl>(D)) {
-    if (Function->isInAnonymousNamespace() &&
-        !isFirstInExternCContext(Function))
-      return getInternalLinkageFor(Function);
-
-    // This is a "void f();" which got merged with a file static.
-    if (Function->getCanonicalDecl()->getStorageClass() == SC_Static)
-      return getInternalLinkageFor(Function);
-
-    LinkageInfo LV;
-    if (!hasExplicitVisibilityAlready(computation)) {
-      if (Optional<Visibility> Vis =
-              getExplicitVisibility(Function, computation))
-        LV.mergeVisibility(*Vis, true);
-    }
-
-    // Note that Sema::MergeCompatibleFunctionDecls already takes care of
-    // merging storage classes and visibility attributes, so we don't have to
-    // look at previous decls in here.
-
-    return LV;
-  }
-
-  if (const auto *Var = dyn_cast<VarDecl>(D)) {
-    if (Var->hasExternalStorage()) {
-      if (Var->isInAnonymousNamespace() && !isFirstInExternCContext(Var))
-        return getInternalLinkageFor(Var);
-
-      LinkageInfo LV;
-      if (Var->getStorageClass() == SC_PrivateExtern)
-        LV.mergeVisibility(HiddenVisibility, true);
-      else if (!hasExplicitVisibilityAlready(computation)) {
-        if (Optional<Visibility> Vis = getExplicitVisibility(Var, computation))
-          LV.mergeVisibility(*Vis, true);
-      }
-
-      if (const VarDecl *Prev = Var->getPreviousDecl()) {
-        LinkageInfo PrevLV = getLVForDecl(Prev, computation);
-        if (PrevLV.getLinkage())
-          LV.setLinkage(PrevLV.getLinkage());
-        LV.mergeVisibility(PrevLV);
-      }
-
-      return LV;
-    }
-
-    if (!Var->isStaticLocal())
-      return LinkageInfo::none();
-  }
-
-  ASTContext &Context = D->getASTContext();
-  if (!Context.getLangOpts().CPlusPlus)
-    return LinkageInfo::none();
-
-  const Decl *OuterD = getOutermostFuncOrBlockContext(D);
-  if (!OuterD || OuterD->isInvalidDecl())
-    return LinkageInfo::none();
-
-  LinkageInfo LV;
-  if (const auto *BD = dyn_cast<BlockDecl>(OuterD)) {
-    if (!BD->getBlockManglingNumber())
-      return LinkageInfo::none();
-
-    LV = getLVForClosure(BD->getDeclContext()->getRedeclContext(),
-                         BD->getBlockManglingContextDecl(), computation);
-  } else {
-    const auto *FD = cast<FunctionDecl>(OuterD);
-    if (!FD->isInlined() &&
-        !isTemplateInstantiation(FD->getTemplateSpecializationKind()))
-      return LinkageInfo::none();
-
-    // If a function is hidden by -fvisibility-inlines-hidden option and
-    // is not explicitly attributed as a hidden function,
-    // we should not make static local variables in the function hidden.
-    LV = getLVForDecl(FD, computation);
-    if (isa<VarDecl>(D) && useInlineVisibilityHidden(FD) &&
-        !LV.isVisibilityExplicit()) {
-      assert(cast<VarDecl>(D)->isStaticLocal());
-      // If this was an implicitly hidden inline method, check again for
-      // explicit visibility on the parent class, and use that for static locals
-      // if present.
-      if (const auto *MD = dyn_cast<CXXMethodDecl>(FD))
-        LV = getLVForDecl(MD->getParent(), computation);
-      if (!LV.isVisibilityExplicit()) {
-        Visibility globalVisibility =
-            computation.isValueVisibility()
-                ? Context.getLangOpts().getValueVisibilityMode()
-                : Context.getLangOpts().getTypeVisibilityMode();
-        return LinkageInfo(VisibleNoLinkage, globalVisibility,
-                           /*visibilityExplicit=*/false);
-      }
-    }
-  }
-  if (!isExternallyVisible(LV.getLinkage()))
-    return LinkageInfo::none();
-  return LinkageInfo(VisibleNoLinkage, LV.getVisibility(),
-                     LV.isVisibilityExplicit());
-}
-
-static inline const CXXRecordDecl*
-getOutermostEnclosingLambda(const CXXRecordDecl *Record) {
-  const CXXRecordDecl *Ret = Record;
-  while (Record && Record->isLambda()) {
-    Ret = Record;
-    if (!Record->getParent()) break;
-    // Get the Containing Class of this Lambda Class
-    Record = dyn_cast_or_null<CXXRecordDecl>(
-      Record->getParent()->getParent());
-  }
-  return Ret;
-}
-
-LinkageInfo LinkageComputer::computeLVForDecl(const NamedDecl *D,
-                                              LVComputationKind computation,
-                                              bool IgnoreVarTypeLinkage) {
-  // Internal_linkage attribute overrides other considerations.
-  if (D->hasAttr<InternalLinkageAttr>())
-    return getInternalLinkageFor(D);
-
-  // Objective-C: treat all Objective-C declarations as having external
-  // linkage.
-  switch (D->getKind()) {
-    default:
-      break;
-
-    // Per C++ [basic.link]p2, only the names of objects, references,
-    // functions, types, templates, namespaces, and values ever have linkage.
-    //
-    // Note that the name of a typedef, namespace alias, using declaration,
-    // and so on are not the name of the corresponding type, namespace, or
-    // declaration, so they do *not* have linkage.
-    case Decl::ImplicitParam:
-    case Decl::Label:
-    case Decl::NamespaceAlias:
-    case Decl::ParmVar:
-    case Decl::Using:
-    case Decl::UsingShadow:
-    case Decl::UsingDirective:
-      return LinkageInfo::none();
-
-    case Decl::EnumConstant:
-      // C++ [basic.link]p4: an enumerator has the linkage of its enumeration.
-      if (D->getASTContext().getLangOpts().CPlusPlus)
-        return getLVForDecl(cast<EnumDecl>(D->getDeclContext()), computation);
-      return LinkageInfo::visible_none();
-
-    case Decl::Typedef:
-    case Decl::TypeAlias:
-      // A typedef declaration has linkage if it gives a type a name for
-      // linkage purposes.
-      if (!cast<TypedefNameDecl>(D)
-               ->getAnonDeclWithTypedefName(/*AnyRedecl*/true))
-        return LinkageInfo::none();
-      break;
-
-    case Decl::TemplateTemplateParm: // count these as external
-    case Decl::NonTypeTemplateParm:
-    case Decl::ObjCAtDefsField:
-    case Decl::ObjCCategory:
-    case Decl::ObjCCategoryImpl:
-    case Decl::ObjCCompatibleAlias:
-    case Decl::ObjCImplementation:
-    case Decl::ObjCMethod:
-    case Decl::ObjCProperty:
-    case Decl::ObjCPropertyImpl:
-    case Decl::ObjCProtocol:
-      return getExternalLinkageFor(D);
-
-    case Decl::CXXRecord: {
-      const auto *Record = cast<CXXRecordDecl>(D);
-      if (Record->isLambda()) {
-        if (!Record->getLambdaManglingNumber()) {
-          // This lambda has no mangling number, so it's internal.
-          return getInternalLinkageFor(D);
-        }
-
-        // This lambda has its linkage/visibility determined:
-        //  - either by the outermost lambda if that lambda has no mangling
-        //    number.
-        //  - or by the parent of the outer most lambda
-        // This prevents infinite recursion in settings such as nested lambdas
-        // used in NSDMI's, for e.g.
-        //  struct L {
-        //    int t{};
-        //    int t2 = ([](int a) { return [](int b) { return b; };})(t)(t);
-        //  };
-        const CXXRecordDecl *OuterMostLambda =
-            getOutermostEnclosingLambda(Record);
-        if (!OuterMostLambda->getLambdaManglingNumber())
-          return getInternalLinkageFor(D);
-
-        return getLVForClosure(
-                  OuterMostLambda->getDeclContext()->getRedeclContext(),
-                  OuterMostLambda->getLambdaContextDecl(), computation);
-      }
-
-      break;
-    }
-  }
-
-  // Handle linkage for namespace-scope names.
-  if (D->getDeclContext()->getRedeclContext()->isFileContext())
-    return getLVForNamespaceScopeDecl(D, computation, IgnoreVarTypeLinkage);
-
-  // C++ [basic.link]p5:
-  //   In addition, a member function, static data member, a named
-  //   class or enumeration of class scope, or an unnamed class or
-  //   enumeration defined in a class-scope typedef declaration such
-  //   that the class or enumeration has the typedef name for linkage
-  //   purposes (7.1.3), has external linkage if the name of the class
-  //   has external linkage.
-  if (D->getDeclContext()->isRecord())
-    return getLVForClassMember(D, computation, IgnoreVarTypeLinkage);
-
-  // C++ [basic.link]p6:
-  //   The name of a function declared in block scope and the name of
-  //   an object declared by a block scope extern declaration have
-  //   linkage. If there is a visible declaration of an entity with
-  //   linkage having the same name and type, ignoring entities
-  //   declared outside the innermost enclosing namespace scope, the
-  //   block scope declaration declares that same entity and receives
-  //   the linkage of the previous declaration. If there is more than
-  //   one such matching entity, the program is ill-formed. Otherwise,
-  //   if no matching entity is found, the block scope entity receives
-  //   external linkage.
-  if (D->getDeclContext()->isFunctionOrMethod())
-    return getLVForLocalDecl(D, computation);
-
-  // C++ [basic.link]p6:
-  //   Names not covered by these rules have no linkage.
-  return LinkageInfo::none();
-}
-
-/// getLVForDecl - Get the linkage and visibility for the given declaration.
-LinkageInfo LinkageComputer::getLVForDecl(const NamedDecl *D,
-                                          LVComputationKind computation) {
-  // Internal_linkage attribute overrides other considerations.
-  if (D->hasAttr<InternalLinkageAttr>())
-    return getInternalLinkageFor(D);
-
-  if (computation.IgnoreAllVisibility && D->hasCachedLinkage())
-    return LinkageInfo(D->getCachedLinkage(), DefaultVisibility, false);
-
-  if (llvm::Optional<LinkageInfo> LI = lookup(D, computation))
-    return *LI;
-
-  LinkageInfo LV = computeLVForDecl(D, computation);
-  if (D->hasCachedLinkage())
-    assert(D->getCachedLinkage() == LV.getLinkage());
-
-  D->setCachedLinkage(LV.getLinkage());
-  cache(D, computation, LV);
-
-#ifndef NDEBUG
-  // In C (because of gnu inline) and in c++ with microsoft extensions an
-  // static can follow an extern, so we can have two decls with different
-  // linkages.
-  const LangOptions &Opts = D->getASTContext().getLangOpts();
-  if (!Opts.CPlusPlus || Opts.MicrosoftExt)
-    return LV;
-
-  // We have just computed the linkage for this decl. By induction we know
-  // that all other computed linkages match, check that the one we just
-  // computed also does.
-  NamedDecl *Old = nullptr;
-  for (auto I : D->redecls()) {
-    auto *T = cast<NamedDecl>(I);
-    if (T == D)
-      continue;
-    if (!T->isInvalidDecl() && T->hasCachedLinkage()) {
-      Old = T;
-      break;
-    }
-  }
-  assert(!Old || Old->getCachedLinkage() == D->getCachedLinkage());
-#endif
-
-  return LV;
-}
-
-LinkageInfo LinkageComputer::getDeclLinkageAndVisibility(const NamedDecl *D) {
-  return getLVForDecl(D,
-                      LVComputationKind(usesTypeVisibility(D)
-                                            ? NamedDecl::VisibilityForType
-                                            : NamedDecl::VisibilityForValue));
-}
-
-Module *Decl::getOwningModuleForLinkage(bool IgnoreLinkage) const {
-  Module *M = getOwningModule();
-  if (!M)
-    return nullptr;
-
-  switch (M->Kind) {
-  case Module::ModuleMapModule:
-    // Module map modules have no special linkage semantics.
-    return nullptr;
-
-  case Module::ModuleInterfaceUnit:
-    return M;
-
-  case Module::GlobalModuleFragment: {
-    // External linkage declarations in the global module have no owning module
-    // for linkage purposes. But internal linkage declarations in the global
-    // module fragment of a particular module are owned by that module for
-    // linkage purposes.
-    if (IgnoreLinkage)
-      return nullptr;
-    bool InternalLinkage;
-    if (auto *ND = dyn_cast<NamedDecl>(this))
-      InternalLinkage = !ND->hasExternalFormalLinkage();
-    else {
-      auto *NSD = dyn_cast<NamespaceDecl>(this);
-      InternalLinkage = (NSD && NSD->isAnonymousNamespace()) ||
-                        isInAnonymousNamespace();
-    }
-    return InternalLinkage ? M->Parent : nullptr;
-  }
-  }
-
-  llvm_unreachable("unknown module kind");
-}
-
-void NamedDecl::printName(raw_ostream &os) const {
-  os << Name;
-}
-
-std::string NamedDecl::getQualifiedNameAsString() const {
-  std::string QualName;
-  llvm::raw_string_ostream OS(QualName);
-  printQualifiedName(OS, getASTContext().getPrintingPolicy());
-  return OS.str();
-}
-
-void NamedDecl::printQualifiedName(raw_ostream &OS) const {
-  printQualifiedName(OS, getASTContext().getPrintingPolicy());
-}
-
-void NamedDecl::printQualifiedName(raw_ostream &OS,
-                                   const PrintingPolicy &P) const {
-  const DeclContext *Ctx = getDeclContext();
-
-  // For ObjC methods, look through categories and use the interface as context.
-  if (auto *MD = dyn_cast<ObjCMethodDecl>(this))
-    if (auto *ID = MD->getClassInterface())
-      Ctx = ID;
-
-  if (Ctx->isFunctionOrMethod()) {
-    printName(OS);
-    return;
-  }
-
-  using ContextsTy = SmallVector<const DeclContext *, 8>;
-  ContextsTy Contexts;
-
-  // Collect named contexts.
-  while (Ctx) {
-    if (isa<NamedDecl>(Ctx))
-      Contexts.push_back(Ctx);
-    Ctx = Ctx->getParent();
-  }
-
-  for (const DeclContext *DC : llvm::reverse(Contexts)) {
-    if (const auto *Spec = dyn_cast<ClassTemplateSpecializationDecl>(DC)) {
-      OS << Spec->getName();
-      const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs();
-      printTemplateArgumentList(OS, TemplateArgs.asArray(), P);
-    } else if (const auto *ND = dyn_cast<NamespaceDecl>(DC)) {
-      if (P.SuppressUnwrittenScope &&
-          (ND->isAnonymousNamespace() || ND->isInline()))
-        continue;
-      if (ND->isAnonymousNamespace()) {
-        OS << (P.MSVCFormatting ? "`anonymous namespace\'"
-                                : "(anonymous namespace)");
-      }
-      else
-        OS << *ND;
-    } else if (const auto *RD = dyn_cast<RecordDecl>(DC)) {
-      if (!RD->getIdentifier())
-        OS << "(anonymous " << RD->getKindName() << ')';
-      else
-        OS << *RD;
-    } else if (const auto *FD = dyn_cast<FunctionDecl>(DC)) {
-      const FunctionProtoType *FT = nullptr;
-      if (FD->hasWrittenPrototype())
-        FT = dyn_cast<FunctionProtoType>(FD->getType()->castAs<FunctionType>());
-
-      OS << *FD << '(';
-      if (FT) {
-        unsigned NumParams = FD->getNumParams();
-        for (unsigned i = 0; i < NumParams; ++i) {
-          if (i)
-            OS << ", ";
-          OS << FD->getParamDecl(i)->getType().stream(P);
-        }
-
-        if (FT->isVariadic()) {
-          if (NumParams > 0)
-            OS << ", ";
-          OS << "...";
-        }
-      }
-      OS << ')';
-    } else if (const auto *ED = dyn_cast<EnumDecl>(DC)) {
-      // C++ [dcl.enum]p10: Each enum-name and each unscoped
-      // enumerator is declared in the scope that immediately contains
-      // the enum-specifier. Each scoped enumerator is declared in the
-      // scope of the enumeration.
-      // For the case of unscoped enumerator, do not include in the qualified
-      // name any information about its enum enclosing scope, as its visibility
-      // is global.
-      if (ED->isScoped())
-        OS << *ED;
-      else
-        continue;
-    } else {
-      OS << *cast<NamedDecl>(DC);
-    }
-    OS << "::";
-  }
-
-  if (getDeclName() || isa<DecompositionDecl>(this))
-    OS << *this;
-  else
-    OS << "(anonymous)";
-}
-
-void NamedDecl::getNameForDiagnostic(raw_ostream &OS,
-                                     const PrintingPolicy &Policy,
-                                     bool Qualified) const {
-  if (Qualified)
-    printQualifiedName(OS, Policy);
-  else
-    printName(OS);
-}
-
-template<typename T> static bool isRedeclarableImpl(Redeclarable<T> *) {
-  return true;
-}
-static bool isRedeclarableImpl(...) { return false; }
-static bool isRedeclarable(Decl::Kind K) {
-  switch (K) {
-#define DECL(Type, Base) \
-  case Decl::Type: \
-    return isRedeclarableImpl((Type##Decl *)nullptr);
-#define ABSTRACT_DECL(DECL)
-#include "clang/AST/DeclNodes.inc"
-  }
-  llvm_unreachable("unknown decl kind");
-}
-
-bool NamedDecl::declarationReplaces(NamedDecl *OldD, bool IsKnownNewer) const {
-  assert(getDeclName() == OldD->getDeclName() && "Declaration name mismatch");
-
-  // Never replace one imported declaration with another; we need both results
-  // when re-exporting.
-  if (OldD->isFromASTFile() && isFromASTFile())
-    return false;
-
-  // A kind mismatch implies that the declaration is not replaced.
-  if (OldD->getKind() != getKind())
-    return false;
-
-  // For method declarations, we never replace. (Why?)
-  if (isa<ObjCMethodDecl>(this))
-    return false;
-
-  // For parameters, pick the newer one. This is either an error or (in
-  // Objective-C) permitted as an extension.
-  if (isa<ParmVarDecl>(this))
-    return true;
-
-  // Inline namespaces can give us two declarations with the same
-  // name and kind in the same scope but different contexts; we should
-  // keep both declarations in this case.
-  if (!this->getDeclContext()->getRedeclContext()->Equals(
-          OldD->getDeclContext()->getRedeclContext()))
-    return false;
-
-  // Using declarations can be replaced if they import the same name from the
-  // same context.
-  if (auto *UD = dyn_cast<UsingDecl>(this)) {
-    ASTContext &Context = getASTContext();
-    return Context.getCanonicalNestedNameSpecifier(UD->getQualifier()) ==
-           Context.getCanonicalNestedNameSpecifier(
-               cast<UsingDecl>(OldD)->getQualifier());
-  }
-  if (auto *UUVD = dyn_cast<UnresolvedUsingValueDecl>(this)) {
-    ASTContext &Context = getASTContext();
-    return Context.getCanonicalNestedNameSpecifier(UUVD->getQualifier()) ==
-           Context.getCanonicalNestedNameSpecifier(
-                        cast<UnresolvedUsingValueDecl>(OldD)->getQualifier());
-  }
-
-  if (isRedeclarable(getKind())) {
-    if (getCanonicalDecl() != OldD->getCanonicalDecl())
-      return false;
-
-    if (IsKnownNewer)
-      return true;
-
-    // Check whether this is actually newer than OldD. We want to keep the
-    // newer declaration. This loop will usually only iterate once, because
-    // OldD is usually the previous declaration.
-    for (auto D : redecls()) {
-      if (D == OldD)
-        break;
-
-      // If we reach the canonical declaration, then OldD is not actually older
-      // than this one.
-      //
-      // FIXME: In this case, we should not add this decl to the lookup table.
-      if (D->isCanonicalDecl())
-        return false;
-    }
-
-    // It's a newer declaration of the same kind of declaration in the same
-    // scope: we want this decl instead of the existing one.
-    return true;
-  }
-
-  // In all other cases, we need to keep both declarations in case they have
-  // different visibility. Any attempt to use the name will result in an
-  // ambiguity if more than one is visible.
-  return false;
-}
-
-bool NamedDecl::hasLinkage() const {
-  return getFormalLinkage() != NoLinkage;
-}
-
-NamedDecl *NamedDecl::getUnderlyingDeclImpl() {
-  NamedDecl *ND = this;
-  while (auto *UD = dyn_cast<UsingShadowDecl>(ND))
-    ND = UD->getTargetDecl();
-
-  if (auto *AD = dyn_cast<ObjCCompatibleAliasDecl>(ND))
-    return AD->getClassInterface();
-
-  if (auto *AD = dyn_cast<NamespaceAliasDecl>(ND))
-    return AD->getNamespace();
-
-  return ND;
-}
-
-bool NamedDecl::isCXXInstanceMember() const {
-  if (!isCXXClassMember())
-    return false;
-
-  const NamedDecl *D = this;
-  if (isa<UsingShadowDecl>(D))
-    D = cast<UsingShadowDecl>(D)->getTargetDecl();
-
-  if (isa<FieldDecl>(D) || isa<IndirectFieldDecl>(D) || isa<MSPropertyDecl>(D))
-    return true;
-  if (const auto *MD = dyn_cast_or_null<CXXMethodDecl>(D->getAsFunction()))
-    return MD->isInstance();
-  return false;
-}
-
-//===----------------------------------------------------------------------===//
-// DeclaratorDecl Implementation
-//===----------------------------------------------------------------------===//
-
-template <typename DeclT>
-static SourceLocation getTemplateOrInnerLocStart(const DeclT *decl) {
-  if (decl->getNumTemplateParameterLists() > 0)
-    return decl->getTemplateParameterList(0)->getTemplateLoc();
-  else
-    return decl->getInnerLocStart();
-}
-
-SourceLocation DeclaratorDecl::getTypeSpecStartLoc() const {
-  TypeSourceInfo *TSI = getTypeSourceInfo();
-  if (TSI) return TSI->getTypeLoc().getBeginLoc();
-  return SourceLocation();
-}
-
-void DeclaratorDecl::setQualifierInfo(NestedNameSpecifierLoc QualifierLoc) {
-  if (QualifierLoc) {
-    // Make sure the extended decl info is allocated.
-    if (!hasExtInfo()) {
-      // Save (non-extended) type source info pointer.
-      auto *savedTInfo = DeclInfo.get<TypeSourceInfo*>();
-      // Allocate external info struct.
-      DeclInfo = new (getASTContext()) ExtInfo;
-      // Restore savedTInfo into (extended) decl info.
-      getExtInfo()->TInfo = savedTInfo;
-    }
-    // Set qualifier info.
-    getExtInfo()->QualifierLoc = QualifierLoc;
-  } else {
-    // Here Qualifier == 0, i.e., we are removing the qualifier (if any).
-    if (hasExtInfo()) {
-      if (getExtInfo()->NumTemplParamLists == 0) {
-        // Save type source info pointer.
-        TypeSourceInfo *savedTInfo = getExtInfo()->TInfo;
-        // Deallocate the extended decl info.
-        getASTContext().Deallocate(getExtInfo());
-        // Restore savedTInfo into (non-extended) decl info.
-        DeclInfo = savedTInfo;
-      }
-      else
-        getExtInfo()->QualifierLoc = QualifierLoc;
-    }
-  }
-}
-
-void DeclaratorDecl::setTemplateParameterListsInfo(
-    ASTContext &Context, ArrayRef<TemplateParameterList *> TPLists) {
-  assert(!TPLists.empty());
-  // Make sure the extended decl info is allocated.
-  if (!hasExtInfo()) {
-    // Save (non-extended) type source info pointer.
-    auto *savedTInfo = DeclInfo.get<TypeSourceInfo*>();
-    // Allocate external info struct.
-    DeclInfo = new (getASTContext()) ExtInfo;
-    // Restore savedTInfo into (extended) decl info.
-    getExtInfo()->TInfo = savedTInfo;
-  }
-  // Set the template parameter lists info.
-  getExtInfo()->setTemplateParameterListsInfo(Context, TPLists);
-}
-
-SourceLocation DeclaratorDecl::getOuterLocStart() const {
-  return getTemplateOrInnerLocStart(this);
-}
-
-// Helper function: returns true if QT is or contains a type
-// having a postfix component.
-static bool typeIsPostfix(QualType QT) {
-  while (true) {
-    const Type* T = QT.getTypePtr();
-    switch (T->getTypeClass()) {
-    default:
-      return false;
-    case Type::Pointer:
-      QT = cast<PointerType>(T)->getPointeeType();
-      break;
-    case Type::BlockPointer:
-      QT = cast<BlockPointerType>(T)->getPointeeType();
-      break;
-    case Type::MemberPointer:
-      QT = cast<MemberPointerType>(T)->getPointeeType();
-      break;
-    case Type::LValueReference:
-    case Type::RValueReference:
-      QT = cast<ReferenceType>(T)->getPointeeType();
-      break;
-    case Type::PackExpansion:
-      QT = cast<PackExpansionType>(T)->getPattern();
-      break;
-    case Type::Paren:
-    case Type::ConstantArray:
-    case Type::DependentSizedArray:
-    case Type::IncompleteArray:
-    case Type::VariableArray:
-    case Type::FunctionProto:
-    case Type::FunctionNoProto:
-      return true;
-    }
-  }
-}
-
-SourceRange DeclaratorDecl::getSourceRange() const {
-  SourceLocation RangeEnd = getLocation();
-  if (TypeSourceInfo *TInfo = getTypeSourceInfo()) {
-    // If the declaration has no name or the type extends past the name take the
-    // end location of the type.
-    if (!getDeclName() || typeIsPostfix(TInfo->getType()))
-      RangeEnd = TInfo->getTypeLoc().getSourceRange().getEnd();
-  }
-  return SourceRange(getOuterLocStart(), RangeEnd);
-}
-
-void QualifierInfo::setTemplateParameterListsInfo(
-    ASTContext &Context, ArrayRef<TemplateParameterList *> TPLists) {
-  // Free previous template parameters (if any).
-  if (NumTemplParamLists > 0) {
-    Context.Deallocate(TemplParamLists);
-    TemplParamLists = nullptr;
-    NumTemplParamLists = 0;
-  }
-  // Set info on matched template parameter lists (if any).
-  if (!TPLists.empty()) {
-    TemplParamLists = new (Context) TemplateParameterList *[TPLists.size()];
-    NumTemplParamLists = TPLists.size();
-    std::copy(TPLists.begin(), TPLists.end(), TemplParamLists);
-  }
-}
-
-//===----------------------------------------------------------------------===//
-// VarDecl Implementation
-//===----------------------------------------------------------------------===//
-
-const char *VarDecl::getStorageClassSpecifierString(StorageClass SC) {
-  switch (SC) {
-  case SC_None:                 break;
-  case SC_Auto:                 return "auto";
-  case SC_Extern:               return "extern";
-  case SC_PrivateExtern:        return "__private_extern__";
-  case SC_Register:             return "register";
-  case SC_Static:               return "static";
-  }
-
-  llvm_unreachable("Invalid storage class");
-}
-
-VarDecl::VarDecl(Kind DK, ASTContext &C, DeclContext *DC,
-                 SourceLocation StartLoc, SourceLocation IdLoc,
-                 IdentifierInfo *Id, QualType T, TypeSourceInfo *TInfo,
-                 StorageClass SC)
-    : DeclaratorDecl(DK, DC, IdLoc, Id, T, TInfo, StartLoc),
-      redeclarable_base(C) {
-  static_assert(sizeof(VarDeclBitfields) <= sizeof(unsigned),
-                "VarDeclBitfields too large!");
-  static_assert(sizeof(ParmVarDeclBitfields) <= sizeof(unsigned),
-                "ParmVarDeclBitfields too large!");
-  static_assert(sizeof(NonParmVarDeclBitfields) <= sizeof(unsigned),
-                "NonParmVarDeclBitfields too large!");
-  AllBits = 0;
-  VarDeclBits.SClass = SC;
-  // Everything else is implicitly initialized to false.
-}
-
-VarDecl *VarDecl::Create(ASTContext &C, DeclContext *DC,
-                         SourceLocation StartL, SourceLocation IdL,
-                         IdentifierInfo *Id, QualType T, TypeSourceInfo *TInfo,
-                         StorageClass S) {
-  return new (C, DC) VarDecl(Var, C, DC, StartL, IdL, Id, T, TInfo, S);
-}
-
-VarDecl *VarDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
-  return new (C, ID)
-      VarDecl(Var, C, nullptr, SourceLocation(), SourceLocation(), nullptr,
-              QualType(), nullptr, SC_None);
-}
-
-void VarDecl::setStorageClass(StorageClass SC) {
-  assert(isLegalForVariable(SC));
-  VarDeclBits.SClass = SC;
-}
-
-VarDecl::TLSKind VarDecl::getTLSKind() const {
-  switch (VarDeclBits.TSCSpec) {
-  case TSCS_unspecified:
-    if (!hasAttr<ThreadAttr>() &&
-        !(getASTContext().getLangOpts().OpenMPUseTLS &&
-          getASTContext().getTargetInfo().isTLSSupported() &&
-          hasAttr<OMPThreadPrivateDeclAttr>()))
-      return TLS_None;
-    return ((getASTContext().getLangOpts().isCompatibleWithMSVC(
-                LangOptions::MSVC2015)) ||
-            hasAttr<OMPThreadPrivateDeclAttr>())
-               ? TLS_Dynamic
-               : TLS_Static;
-  case TSCS___thread: // Fall through.
-  case TSCS__Thread_local:
-    return TLS_Static;
-  case TSCS_thread_local:
-    return TLS_Dynamic;
-  }
-  llvm_unreachable("Unknown thread storage class specifier!");
-}
-
-SourceRange VarDecl::getSourceRange() const {
-  if (const Expr *Init = getInit()) {
-    SourceLocation InitEnd = Init->getEndLoc();
-    // If Init is implicit, ignore its source range and fallback on
-    // DeclaratorDecl::getSourceRange() to handle postfix elements.
-    if (InitEnd.isValid() && InitEnd != getLocation())
-      return SourceRange(getOuterLocStart(), InitEnd);
-  }
-  return DeclaratorDecl::getSourceRange();
-}
-
-template<typename T>
-static LanguageLinkage getDeclLanguageLinkage(const T &D) {
-  // C++ [dcl.link]p1: All function types, function names with external linkage,
-  // and variable names with external linkage have a language linkage.
-  if (!D.hasExternalFormalLinkage())
-    return NoLanguageLinkage;
-
-  // Language linkage is a C++ concept, but saying that everything else in C has
-  // C language linkage fits the implementation nicely.
-  ASTContext &Context = D.getASTContext();
-  if (!Context.getLangOpts().CPlusPlus)
-    return CLanguageLinkage;
-
-  // C++ [dcl.link]p4: A C language linkage is ignored in determining the
-  // language linkage of the names of class members and the function type of
-  // class member functions.
-  const DeclContext *DC = D.getDeclContext();
-  if (DC->isRecord())
-    return CXXLanguageLinkage;
-
-  // If the first decl is in an extern "C" context, any other redeclaration
-  // will have C language linkage. If the first one is not in an extern "C"
-  // context, we would have reported an error for any other decl being in one.
-  if (isFirstInExternCContext(&D))
-    return CLanguageLinkage;
-  return CXXLanguageLinkage;
-}
-
-template<typename T>
-static bool isDeclExternC(const T &D) {
-  // Since the context is ignored for class members, they can only have C++
-  // language linkage or no language linkage.
-  const DeclContext *DC = D.getDeclContext();
-  if (DC->isRecord()) {
-    assert(D.getASTContext().getLangOpts().CPlusPlus);
-    return false;
-  }
-
-  return D.getLanguageLinkage() == CLanguageLinkage;
-}
-
-LanguageLinkage VarDecl::getLanguageLinkage() const {
-  return getDeclLanguageLinkage(*this);
-}
-
-bool VarDecl::isExternC() const {
-  return isDeclExternC(*this);
-}
-
-bool VarDecl::isInExternCContext() const {
-  return getLexicalDeclContext()->isExternCContext();
-}
-
-bool VarDecl::isInExternCXXContext() const {
-  return getLexicalDeclContext()->isExternCXXContext();
-}
-
-VarDecl *VarDecl::getCanonicalDecl() { return getFirstDecl(); }
-
-VarDecl::DefinitionKind
-VarDecl::isThisDeclarationADefinition(ASTContext &C) const {
-  if (isThisDeclarationADemotedDefinition())
-    return DeclarationOnly;
-
-  // C++ [basic.def]p2:
-  //   A declaration is a definition unless [...] it contains the 'extern'
-  //   specifier or a linkage-specification and neither an initializer [...],
-  //   it declares a non-inline static data member in a class declaration [...],
-  //   it declares a static data member outside a class definition and the variable
-  //   was defined within the class with the constexpr specifier [...],
-  // C++1y [temp.expl.spec]p15:
-  //   An explicit specialization of a static data member or an explicit
-  //   specialization of a static data member template is a definition if the
-  //   declaration includes an initializer; otherwise, it is a declaration.
-  //
-  // FIXME: How do you declare (but not define) a partial specialization of
-  // a static data member template outside the containing class?
-  if (isStaticDataMember()) {
-    if (isOutOfLine() &&
-        !(getCanonicalDecl()->isInline() &&
-          getCanonicalDecl()->isConstexpr()) &&
-        (hasInit() ||
-         // If the first declaration is out-of-line, this may be an
-         // instantiation of an out-of-line partial specialization of a variable
-         // template for which we have not yet instantiated the initializer.
-         (getFirstDecl()->isOutOfLine()
-              ? getTemplateSpecializationKind() == TSK_Undeclared
-              : getTemplateSpecializationKind() !=
-                    TSK_ExplicitSpecialization) ||
-         isa<VarTemplatePartialSpecializationDecl>(this)))
-      return Definition;
-    else if (!isOutOfLine() && isInline())
-      return Definition;
-    else
-      return DeclarationOnly;
-  }
-  // C99 6.7p5:
-  //   A definition of an identifier is a declaration for that identifier that
-  //   [...] causes storage to be reserved for that object.
-  // Note: that applies for all non-file-scope objects.
-  // C99 6.9.2p1:
-  //   If the declaration of an identifier for an object has file scope and an
-  //   initializer, the declaration is an external definition for the identifier
-  if (hasInit())
-    return Definition;
-
-  if (hasDefiningAttr())
-    return Definition;
-
-  if (const auto *SAA = getAttr<SelectAnyAttr>())
-    if (!SAA->isInherited())
-      return Definition;
-
-  // A variable template specialization (other than a static data member
-  // template or an explicit specialization) is a declaration until we
-  // instantiate its initializer.
-  if (auto *VTSD = dyn_cast<VarTemplateSpecializationDecl>(this)) {
-    if (VTSD->getTemplateSpecializationKind() != TSK_ExplicitSpecialization &&
-        !isa<VarTemplatePartialSpecializationDecl>(VTSD) &&
-        !VTSD->IsCompleteDefinition)
-      return DeclarationOnly;
-  }
-
-  if (hasExternalStorage())
-    return DeclarationOnly;
-
-  // [dcl.link] p7:
-  //   A declaration directly contained in a linkage-specification is treated
-  //   as if it contains the extern specifier for the purpose of determining
-  //   the linkage of the declared name and whether it is a definition.
-  if (isSingleLineLanguageLinkage(*this))
-    return DeclarationOnly;
-
-  // C99 6.9.2p2:
-  //   A declaration of an object that has file scope without an initializer,
-  //   and without a storage class specifier or the scs 'static', constitutes
-  //   a tentative definition.
-  // No such thing in C++.
-  if (!C.getLangOpts().CPlusPlus && isFileVarDecl())
-    return TentativeDefinition;
-
-  // What's left is (in C, block-scope) declarations without initializers or
-  // external storage. These are definitions.
-  return Definition;
-}
-
-VarDecl *VarDecl::getActingDefinition() {
-  DefinitionKind Kind = isThisDeclarationADefinition();
-  if (Kind != TentativeDefinition)
-    return nullptr;
-
-  VarDecl *LastTentative = nullptr;
-  VarDecl *First = getFirstDecl();
-  for (auto I : First->redecls()) {
-    Kind = I->isThisDeclarationADefinition();
-    if (Kind == Definition)
-      return nullptr;
-    else if (Kind == TentativeDefinition)
-      LastTentative = I;
-  }
-  return LastTentative;
-}
-
-VarDecl *VarDecl::getDefinition(ASTContext &C) {
-  VarDecl *First = getFirstDecl();
-  for (auto I : First->redecls()) {
-    if (I->isThisDeclarationADefinition(C) == Definition)
-      return I;
-  }
-  return nullptr;
-}
-
-VarDecl::DefinitionKind VarDecl::hasDefinition(ASTContext &C) const {
-  DefinitionKind Kind = DeclarationOnly;
-
-  const VarDecl *First = getFirstDecl();
-  for (auto I : First->redecls()) {
-    Kind = std::max(Kind, I->isThisDeclarationADefinition(C));
-    if (Kind == Definition)
-      break;
-  }
-
-  return Kind;
-}
-
-const Expr *VarDecl::getAnyInitializer(const VarDecl *&D) const {
-  for (auto I : redecls()) {
-    if (auto Expr = I->getInit()) {
-      D = I;
-      return Expr;
-    }
-  }
-  return nullptr;
-}
-
-bool VarDecl::hasInit() const {
-  if (auto *P = dyn_cast<ParmVarDecl>(this))
-    if (P->hasUnparsedDefaultArg() || P->hasUninstantiatedDefaultArg())
-      return false;
-
-  return !Init.isNull();
-}
-
-Expr *VarDecl::getInit() {
-  if (!hasInit())
-    return nullptr;
-
-  if (auto *S = Init.dyn_cast<Stmt *>())
-    return cast<Expr>(S);
-
-  return cast_or_null<Expr>(Init.get<EvaluatedStmt *>()->Value);
-}
-
-Stmt **VarDecl::getInitAddress() {
-  if (auto *ES = Init.dyn_cast<EvaluatedStmt *>())
-    return &ES->Value;
-
-  return Init.getAddrOfPtr1();
-}
-
-bool VarDecl::isOutOfLine() const {
-  if (Decl::isOutOfLine())
-    return true;
-
-  if (!isStaticDataMember())
-    return false;
-
-  // If this static data member was instantiated from a static data member of
-  // a class template, check whether that static data member was defined
-  // out-of-line.
-  if (VarDecl *VD = getInstantiatedFromStaticDataMember())
-    return VD->isOutOfLine();
-
-  return false;
-}
-
-void VarDecl::setInit(Expr *I) {
-  if (auto *Eval = Init.dyn_cast<EvaluatedStmt *>()) {
-    Eval->~EvaluatedStmt();
-    getASTContext().Deallocate(Eval);
-  }
-
-  Init = I;
-}
-
-bool VarDecl::isUsableInConstantExpressions(ASTContext &C) const {
-  const LangOptions &Lang = C.getLangOpts();
-
-  if (!Lang.CPlusPlus)
-    return false;
-
-  // In C++11, any variable of reference type can be used in a constant
-  // expression if it is initialized by a constant expression.
-  if (Lang.CPlusPlus11 && getType()->isReferenceType())
-    return true;
-
-  // Only const objects can be used in constant expressions in C++. C++98 does
-  // not require the variable to be non-volatile, but we consider this to be a
-  // defect.
-  if (!getType().isConstQualified() || getType().isVolatileQualified())
-    return false;
-
-  // In C++, const, non-volatile variables of integral or enumeration types
-  // can be used in constant expressions.
-  if (getType()->isIntegralOrEnumerationType())
-    return true;
-
-  // Additionally, in C++11, non-volatile constexpr variables can be used in
-  // constant expressions.
-  return Lang.CPlusPlus11 && isConstexpr();
-}
-
-/// Convert the initializer for this declaration to the elaborated EvaluatedStmt
-/// form, which contains extra information on the evaluated value of the
-/// initializer.
-EvaluatedStmt *VarDecl::ensureEvaluatedStmt() const {
-  auto *Eval = Init.dyn_cast<EvaluatedStmt *>();
-  if (!Eval) {
-    // Note: EvaluatedStmt contains an APValue, which usually holds
-    // resources not allocated from the ASTContext.  We need to do some
-    // work to avoid leaking those, but we do so in VarDecl::evaluateValue
-    // where we can detect whether there's anything to clean up or not.
-    Eval = new (getASTContext()) EvaluatedStmt;
-    Eval->Value = Init.get<Stmt *>();
-    Init = Eval;
-  }
-  return Eval;
-}
-
-APValue *VarDecl::evaluateValue() const {
-  SmallVector<PartialDiagnosticAt, 8> Notes;
-  return evaluateValue(Notes);
-}
-
-APValue *VarDecl::evaluateValue(
-    SmallVectorImpl<PartialDiagnosticAt> &Notes) const {
-  EvaluatedStmt *Eval = ensureEvaluatedStmt();
-
-  // We only produce notes indicating why an initializer is non-constant the
-  // first time it is evaluated. FIXME: The notes won't always be emitted the
-  // first time we try evaluation, so might not be produced at all.
-  if (Eval->WasEvaluated)
-    return Eval->Evaluated.isUninit() ? nullptr : &Eval->Evaluated;
-
-  const auto *Init = cast<Expr>(Eval->Value);
-  assert(!Init->isValueDependent());
-
-  if (Eval->IsEvaluating) {
-    // FIXME: Produce a diagnostic for self-initialization.
-    Eval->CheckedICE = true;
-    Eval->IsICE = false;
-    return nullptr;
-  }
-
-  Eval->IsEvaluating = true;
-
-  bool Result = Init->EvaluateAsInitializer(Eval->Evaluated, getASTContext(),
-                                            this, Notes);
-
-  // Ensure the computed APValue is cleaned up later if evaluation succeeded,
-  // or that it's empty (so that there's nothing to clean up) if evaluation
-  // failed.
-  if (!Result)
-    Eval->Evaluated = APValue();
-  else if (Eval->Evaluated.needsCleanup())
-    getASTContext().addDestruction(&Eval->Evaluated);
-
-  Eval->IsEvaluating = false;
-  Eval->WasEvaluated = true;
-
-  // In C++11, we have determined whether the initializer was a constant
-  // expression as a side-effect.
-  if (getASTContext().getLangOpts().CPlusPlus11 && !Eval->CheckedICE) {
-    Eval->CheckedICE = true;
-    Eval->IsICE = Result && Notes.empty();
-  }
-
-  return Result ? &Eval->Evaluated : nullptr;
-}
-
-APValue *VarDecl::getEvaluatedValue() const {
-  if (EvaluatedStmt *Eval = Init.dyn_cast<EvaluatedStmt *>())
-    if (Eval->WasEvaluated)
-      return &Eval->Evaluated;
-
-  return nullptr;
-}
-
-bool VarDecl::isInitKnownICE() const {
-  if (EvaluatedStmt *Eval = Init.dyn_cast<EvaluatedStmt *>())
-    return Eval->CheckedICE;
-
-  return false;
-}
-
-bool VarDecl::isInitICE() const {
-  assert(isInitKnownICE() &&
-         "Check whether we already know that the initializer is an ICE");
-  return Init.get<EvaluatedStmt *>()->IsICE;
-}
-
-bool VarDecl::checkInitIsICE() const {
-  // Initializers of weak variables are never ICEs.
-  if (isWeak())
-    return false;
-
-  EvaluatedStmt *Eval = ensureEvaluatedStmt();
-  if (Eval->CheckedICE)
-    // We have already checked whether this subexpression is an
-    // integral constant expression.
-    return Eval->IsICE;
-
-  const auto *Init = cast<Expr>(Eval->Value);
-  assert(!Init->isValueDependent());
-
-  // In C++11, evaluate the initializer to check whether it's a constant
-  // expression.
-  if (getASTContext().getLangOpts().CPlusPlus11) {
-    SmallVector<PartialDiagnosticAt, 8> Notes;
-    evaluateValue(Notes);
-    return Eval->IsICE;
-  }
-
-  // It's an ICE whether or not the definition we found is
-  // out-of-line.  See DR 721 and the discussion in Clang PR
-  // 6206 for details.
-
-  if (Eval->CheckingICE)
-    return false;
-  Eval->CheckingICE = true;
-
-  Eval->IsICE = Init->isIntegerConstantExpr(getASTContext());
-  Eval->CheckingICE = false;
-  Eval->CheckedICE = true;
-  return Eval->IsICE;
-}
-
-template<typename DeclT>
-static DeclT *getDefinitionOrSelf(DeclT *D) {
-  assert(D);
-  if (auto *Def = D->getDefinition())
-    return Def;
-  return D;
-}
-
-bool VarDecl::isEscapingByref() const {
-  return hasAttr<BlocksAttr>() && NonParmVarDeclBits.EscapingByref;
-}
-
-bool VarDecl::isNonEscapingByref() const {
-  return hasAttr<BlocksAttr>() && !NonParmVarDeclBits.EscapingByref;
-}
-
-VarDecl *VarDecl::getTemplateInstantiationPattern() const {
-  // If it's a variable template specialization, find the template or partial
-  // specialization from which it was instantiated.
-  if (auto *VDTemplSpec = dyn_cast<VarTemplateSpecializationDecl>(this)) {
-    auto From = VDTemplSpec->getInstantiatedFrom();
-    if (auto *VTD = From.dyn_cast<VarTemplateDecl *>()) {
-      while (auto *NewVTD = VTD->getInstantiatedFromMemberTemplate()) {
-        if (NewVTD->isMemberSpecialization())
-          break;
-        VTD = NewVTD;
-      }
-      return getDefinitionOrSelf(VTD->getTemplatedDecl());
-    }
-    if (auto *VTPSD =
-            From.dyn_cast<VarTemplatePartialSpecializationDecl *>()) {
-      while (auto *NewVTPSD = VTPSD->getInstantiatedFromMember()) {
-        if (NewVTPSD->isMemberSpecialization())
-          break;
-        VTPSD = NewVTPSD;
-      }
-      return getDefinitionOrSelf<VarDecl>(VTPSD);
-    }
-  }
-
-  if (MemberSpecializationInfo *MSInfo = getMemberSpecializationInfo()) {
-    if (isTemplateInstantiation(MSInfo->getTemplateSpecializationKind())) {
-      VarDecl *VD = getInstantiatedFromStaticDataMember();
-      while (auto *NewVD = VD->getInstantiatedFromStaticDataMember())
-        VD = NewVD;
-      return getDefinitionOrSelf(VD);
-    }
-  }
-
-  if (VarTemplateDecl *VarTemplate = getDescribedVarTemplate()) {
-    while (VarTemplate->getInstantiatedFromMemberTemplate()) {
-      if (VarTemplate->isMemberSpecialization())
-        break;
-      VarTemplate = VarTemplate->getInstantiatedFromMemberTemplate();
-    }
-
-    return getDefinitionOrSelf(VarTemplate->getTemplatedDecl());
-  }
-  return nullptr;
-}
-
-VarDecl *VarDecl::getInstantiatedFromStaticDataMember() const {
-  if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo())
-    return cast<VarDecl>(MSI->getInstantiatedFrom());
-
-  return nullptr;
-}
-
-TemplateSpecializationKind VarDecl::getTemplateSpecializationKind() const {
-  if (const auto *Spec = dyn_cast<VarTemplateSpecializationDecl>(this))
-    return Spec->getSpecializationKind();
-
-  if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo())
-    return MSI->getTemplateSpecializationKind();
-
-  return TSK_Undeclared;
-}
-
-SourceLocation VarDecl::getPointOfInstantiation() const {
-  if (const auto *Spec = dyn_cast<VarTemplateSpecializationDecl>(this))
-    return Spec->getPointOfInstantiation();
-
-  if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo())
-    return MSI->getPointOfInstantiation();
-
-  return SourceLocation();
-}
-
-VarTemplateDecl *VarDecl::getDescribedVarTemplate() const {
-  return getASTContext().getTemplateOrSpecializationInfo(this)
-      .dyn_cast<VarTemplateDecl *>();
-}
-
-void VarDecl::setDescribedVarTemplate(VarTemplateDecl *Template) {
-  getASTContext().setTemplateOrSpecializationInfo(this, Template);
-}
-
-bool VarDecl::isKnownToBeDefined() const {
-  const auto &LangOpts = getASTContext().getLangOpts();
-  // In CUDA mode without relocatable device code, variables of form 'extern
-  // __shared__ Foo foo[]' are pointers to the base of the GPU core's shared
-  // memory pool.  These are never undefined variables, even if they appear
-  // inside of an anon namespace or static function.
-  //
-  // With CUDA relocatable device code enabled, these variables don't get
-  // special handling; they're treated like regular extern variables.
-  if (LangOpts.CUDA && !LangOpts.GPURelocatableDeviceCode &&
-      hasExternalStorage() && hasAttr<CUDASharedAttr>() &&
-      isa<IncompleteArrayType>(getType()))
-    return true;
-
-  return hasDefinition();
-}
-
-bool VarDecl::isNoDestroy(const ASTContext &Ctx) const {
-  return hasGlobalStorage() && (hasAttr<NoDestroyAttr>() ||
-                                (!Ctx.getLangOpts().RegisterStaticDestructors &&
-                                 !hasAttr<AlwaysDestroyAttr>()));
-}
-
-MemberSpecializationInfo *VarDecl::getMemberSpecializationInfo() const {
-  if (isStaticDataMember())
-    // FIXME: Remove ?
-    // return getASTContext().getInstantiatedFromStaticDataMember(this);
-    return getASTContext().getTemplateOrSpecializationInfo(this)
-        .dyn_cast<MemberSpecializationInfo *>();
-  return nullptr;
-}
-
-void VarDecl::setTemplateSpecializationKind(TemplateSpecializationKind TSK,
-                                         SourceLocation PointOfInstantiation) {
-  assert((isa<VarTemplateSpecializationDecl>(this) ||
-          getMemberSpecializationInfo()) &&
-         "not a variable or static data member template specialization");
-
-  if (VarTemplateSpecializationDecl *Spec =
-          dyn_cast<VarTemplateSpecializationDecl>(this)) {
-    Spec->setSpecializationKind(TSK);
-    if (TSK != TSK_ExplicitSpecialization && PointOfInstantiation.isValid() &&
-        Spec->getPointOfInstantiation().isInvalid()) {
-      Spec->setPointOfInstantiation(PointOfInstantiation);
-      if (ASTMutationListener *L = getASTContext().getASTMutationListener())
-        L->InstantiationRequested(this);
-    }
-  }
-
-  if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo()) {
-    MSI->setTemplateSpecializationKind(TSK);
-    if (TSK != TSK_ExplicitSpecialization && PointOfInstantiation.isValid() &&
-        MSI->getPointOfInstantiation().isInvalid()) {
-      MSI->setPointOfInstantiation(PointOfInstantiation);
-      if (ASTMutationListener *L = getASTContext().getASTMutationListener())
-        L->InstantiationRequested(this);
-    }
-  }
-}
-
-void
-VarDecl::setInstantiationOfStaticDataMember(VarDecl *VD,
-                                            TemplateSpecializationKind TSK) {
-  assert(getASTContext().getTemplateOrSpecializationInfo(this).isNull() &&
-         "Previous template or instantiation?");
-  getASTContext().setInstantiatedFromStaticDataMember(this, VD, TSK);
-}
-
-//===----------------------------------------------------------------------===//
-// ParmVarDecl Implementation
-//===----------------------------------------------------------------------===//
-
-ParmVarDecl *ParmVarDecl::Create(ASTContext &C, DeclContext *DC,
-                                 SourceLocation StartLoc,
-                                 SourceLocation IdLoc, IdentifierInfo *Id,
-                                 QualType T, TypeSourceInfo *TInfo,
-                                 StorageClass S, Expr *DefArg) {
-  return new (C, DC) ParmVarDecl(ParmVar, C, DC, StartLoc, IdLoc, Id, T, TInfo,
-                                 S, DefArg);
-}
-
-QualType ParmVarDecl::getOriginalType() const {
-  TypeSourceInfo *TSI = getTypeSourceInfo();
-  QualType T = TSI ? TSI->getType() : getType();
-  if (const auto *DT = dyn_cast<DecayedType>(T))
-    return DT->getOriginalType();
-  return T;
-}
-
-ParmVarDecl *ParmVarDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
-  return new (C, ID)
-      ParmVarDecl(ParmVar, C, nullptr, SourceLocation(), SourceLocation(),
-                  nullptr, QualType(), nullptr, SC_None, nullptr);
-}
-
-SourceRange ParmVarDecl::getSourceRange() const {
-  if (!hasInheritedDefaultArg()) {
-    SourceRange ArgRange = getDefaultArgRange();
-    if (ArgRange.isValid())
-      return SourceRange(getOuterLocStart(), ArgRange.getEnd());
-  }
-
-  // DeclaratorDecl considers the range of postfix types as overlapping with the
-  // declaration name, but this is not the case with parameters in ObjC methods.
-  if (isa<ObjCMethodDecl>(getDeclContext()))
-    return SourceRange(DeclaratorDecl::getBeginLoc(), getLocation());
-
-  return DeclaratorDecl::getSourceRange();
-}
-
-Expr *ParmVarDecl::getDefaultArg() {
-  assert(!hasUnparsedDefaultArg() && "Default argument is not yet parsed!");
-  assert(!hasUninstantiatedDefaultArg() &&
-         "Default argument is not yet instantiated!");
-
-  Expr *Arg = getInit();
-  if (auto *E = dyn_cast_or_null<FullExpr>(Arg))
-    return E->getSubExpr();
-
-  return Arg;
-}
-
-void ParmVarDecl::setDefaultArg(Expr *defarg) {
-  ParmVarDeclBits.DefaultArgKind = DAK_Normal;
-  Init = defarg;
-}
-
-SourceRange ParmVarDecl::getDefaultArgRange() const {
-  switch (ParmVarDeclBits.DefaultArgKind) {
-  case DAK_None:
-  case DAK_Unparsed:
-    // Nothing we can do here.
-    return SourceRange();
-
-  case DAK_Uninstantiated:
-    return getUninstantiatedDefaultArg()->getSourceRange();
-
-  case DAK_Normal:
-    if (const Expr *E = getInit())
-      return E->getSourceRange();
-
-    // Missing an actual expression, may be invalid.
-    return SourceRange();
-  }
-  llvm_unreachable("Invalid default argument kind.");
-}
-
-void ParmVarDecl::setUninstantiatedDefaultArg(Expr *arg) {
-  ParmVarDeclBits.DefaultArgKind = DAK_Uninstantiated;
-  Init = arg;
-}
-
-Expr *ParmVarDecl::getUninstantiatedDefaultArg() {
-  assert(hasUninstantiatedDefaultArg() &&
-         "Wrong kind of initialization expression!");
-  return cast_or_null<Expr>(Init.get<Stmt *>());
-}
-
-bool ParmVarDecl::hasDefaultArg() const {
-  // FIXME: We should just return false for DAK_None here once callers are
-  // prepared for the case that we encountered an invalid default argument and
-  // were unable to even build an invalid expression.
-  return hasUnparsedDefaultArg() || hasUninstantiatedDefaultArg() ||
-         !Init.isNull();
-}
-
-bool ParmVarDecl::isParameterPack() const {
-  return isa<PackExpansionType>(getType());
-}
-
-void ParmVarDecl::setParameterIndexLarge(unsigned parameterIndex) {
-  getASTContext().setParameterIndex(this, parameterIndex);
-  ParmVarDeclBits.ParameterIndex = ParameterIndexSentinel;
-}
-
-unsigned ParmVarDecl::getParameterIndexLarge() const {
-  return getASTContext().getParameterIndex(this);
-}
-
-//===----------------------------------------------------------------------===//
-// FunctionDecl Implementation
-//===----------------------------------------------------------------------===//
-
-FunctionDecl::FunctionDecl(Kind DK, ASTContext &C, DeclContext *DC,
-                           SourceLocation StartLoc,
-                           const DeclarationNameInfo &NameInfo, QualType T,
-                           TypeSourceInfo *TInfo, StorageClass S,
-                           bool isInlineSpecified, bool isConstexprSpecified)
-    : DeclaratorDecl(DK, DC, NameInfo.getLoc(), NameInfo.getName(), T, TInfo,
-                     StartLoc),
-      DeclContext(DK), redeclarable_base(C), ODRHash(0),
-      EndRangeLoc(NameInfo.getEndLoc()), DNLoc(NameInfo.getInfo()) {
-  assert(T.isNull() || T->isFunctionType());
-  FunctionDeclBits.SClass = S;
-  FunctionDeclBits.IsInline = isInlineSpecified;
-  FunctionDeclBits.IsInlineSpecified = isInlineSpecified;
-  FunctionDeclBits.IsExplicitSpecified = false;
-  FunctionDeclBits.IsVirtualAsWritten = false;
-  FunctionDeclBits.IsPure = false;
-  FunctionDeclBits.HasInheritedPrototype = false;
-  FunctionDeclBits.HasWrittenPrototype = true;
-  FunctionDeclBits.IsDeleted = false;
-  FunctionDeclBits.IsTrivial = false;
-  FunctionDeclBits.IsTrivialForCall = false;
-  FunctionDeclBits.IsDefaulted = false;
-  FunctionDeclBits.IsExplicitlyDefaulted = false;
-  FunctionDeclBits.HasImplicitReturnZero = false;
-  FunctionDeclBits.IsLateTemplateParsed = false;
-  FunctionDeclBits.IsConstexpr = isConstexprSpecified;
-  FunctionDeclBits.InstantiationIsPending = false;
-  FunctionDeclBits.UsesSEHTry = false;
-  FunctionDeclBits.HasSkippedBody = false;
-  FunctionDeclBits.WillHaveBody = false;
-  FunctionDeclBits.IsMultiVersion = false;
-  FunctionDeclBits.IsCopyDeductionCandidate = false;
-  FunctionDeclBits.HasODRHash = false;
-}
-
-void FunctionDecl::getNameForDiagnostic(
-    raw_ostream &OS, const PrintingPolicy &Policy, bool Qualified) const {
-  NamedDecl::getNameForDiagnostic(OS, Policy, Qualified);
-  const TemplateArgumentList *TemplateArgs = getTemplateSpecializationArgs();
-  if (TemplateArgs)
-    printTemplateArgumentList(OS, TemplateArgs->asArray(), Policy);
-}
-
-bool FunctionDecl::isVariadic() const {
-  if (const auto *FT = getType()->getAs<FunctionProtoType>())
-    return FT->isVariadic();
-  return false;
-}
-
-bool FunctionDecl::hasBody(const FunctionDecl *&Definition) const {
-  for (auto I : redecls()) {
-    if (I->doesThisDeclarationHaveABody()) {
-      Definition = I;
-      return true;
-    }
-  }
-
-  return false;
-}
-
-bool FunctionDecl::hasTrivialBody() const
-{
-  Stmt *S = getBody();
-  if (!S) {
-    // Since we don't have a body for this function, we don't know if it's
-    // trivial or not.
-    return false;
-  }
-
-  if (isa<CompoundStmt>(S) && cast<CompoundStmt>(S)->body_empty())
-    return true;
-  return false;
-}
-
-bool FunctionDecl::isDefined(const FunctionDecl *&Definition) const {
-  for (auto I : redecls()) {
-    if (I->isThisDeclarationADefinition()) {
-      Definition = I;
-      return true;
-    }
-  }
-
-  return false;
-}
-
-Stmt *FunctionDecl::getBody(const FunctionDecl *&Definition) const {
-  if (!hasBody(Definition))
-    return nullptr;
-
-  if (Definition->Body)
-    return Definition->Body.get(getASTContext().getExternalSource());
-
-  return nullptr;
-}
-
-void FunctionDecl::setBody(Stmt *B) {
-  Body = B;
-  if (B)
-    EndRangeLoc = B->getEndLoc();
-}
-
-void FunctionDecl::setPure(bool P) {
-  FunctionDeclBits.IsPure = P;
-  if (P)
-    if (auto *Parent = dyn_cast<CXXRecordDecl>(getDeclContext()))
-      Parent->markedVirtualFunctionPure();
-}
-
-template<std::size_t Len>
-static bool isNamed(const NamedDecl *ND, const char (&Str)[Len]) {
-  IdentifierInfo *II = ND->getIdentifier();
-  return II && II->isStr(Str);
-}
-
-bool FunctionDecl::isMain() const {
-  const TranslationUnitDecl *tunit =
-    dyn_cast<TranslationUnitDecl>(getDeclContext()->getRedeclContext());
-  return tunit &&
-         !tunit->getASTContext().getLangOpts().Freestanding &&
-         isNamed(this, "main");
-}
-
-bool FunctionDecl::isMSVCRTEntryPoint() const {
-  const TranslationUnitDecl *TUnit =
-      dyn_cast<TranslationUnitDecl>(getDeclContext()->getRedeclContext());
-  if (!TUnit)
-    return false;
-
-  // Even though we aren't really targeting MSVCRT if we are freestanding,
-  // semantic analysis for these functions remains the same.
-
-  // MSVCRT entry points only exist on MSVCRT targets.
-  if (!TUnit->getASTContext().getTargetInfo().getTriple().isOSMSVCRT())
-    return false;
-
-  // Nameless functions like constructors cannot be entry points.
-  if (!getIdentifier())
-    return false;
-
-  return llvm::StringSwitch<bool>(getName())
-      .Cases("main",     // an ANSI console app
-             "wmain",    // a Unicode console App
-             "WinMain",  // an ANSI GUI app
-             "wWinMain", // a Unicode GUI app
-             "DllMain",  // a DLL
-             true)
-      .Default(false);
-}
-
-bool FunctionDecl::isReservedGlobalPlacementOperator() const {
-  assert(getDeclName().getNameKind() == DeclarationName::CXXOperatorName);
-  assert(getDeclName().getCXXOverloadedOperator() == OO_New ||
-         getDeclName().getCXXOverloadedOperator() == OO_Delete ||
-         getDeclName().getCXXOverloadedOperator() == OO_Array_New ||
-         getDeclName().getCXXOverloadedOperator() == OO_Array_Delete);
-
-  if (!getDeclContext()->getRedeclContext()->isTranslationUnit())
-    return false;
-
-  const auto *proto = getType()->castAs<FunctionProtoType>();
-  if (proto->getNumParams() != 2 || proto->isVariadic())
-    return false;
-
-  ASTContext &Context =
-    cast<TranslationUnitDecl>(getDeclContext()->getRedeclContext())
-      ->getASTContext();
-
-  // The result type and first argument type are constant across all
-  // these operators.  The second argument must be exactly void*.
-  return (proto->getParamType(1).getCanonicalType() == Context.VoidPtrTy);
-}
-
-bool FunctionDecl::isReplaceableGlobalAllocationFunction(bool *IsAligned) const {
-  if (getDeclName().getNameKind() != DeclarationName::CXXOperatorName)
-    return false;
-  if (getDeclName().getCXXOverloadedOperator() != OO_New &&
-      getDeclName().getCXXOverloadedOperator() != OO_Delete &&
-      getDeclName().getCXXOverloadedOperator() != OO_Array_New &&
-      getDeclName().getCXXOverloadedOperator() != OO_Array_Delete)
-    return false;
-
-  if (isa<CXXRecordDecl>(getDeclContext()))
-    return false;
-
-  // This can only fail for an invalid 'operator new' declaration.
-  if (!getDeclContext()->getRedeclContext()->isTranslationUnit())
-    return false;
-
-  const auto *FPT = getType()->castAs<FunctionProtoType>();
-  if (FPT->getNumParams() == 0 || FPT->getNumParams() > 3 || FPT->isVariadic())
-    return false;
-
-  // If this is a single-parameter function, it must be a replaceable global
-  // allocation or deallocation function.
-  if (FPT->getNumParams() == 1)
-    return true;
-
-  unsigned Params = 1;
-  QualType Ty = FPT->getParamType(Params);
-  ASTContext &Ctx = getASTContext();
-
-  auto Consume = [&] {
-    ++Params;
-    Ty = Params < FPT->getNumParams() ? FPT->getParamType(Params) : QualType();
-  };
-
-  // In C++14, the next parameter can be a 'std::size_t' for sized delete.
-  bool IsSizedDelete = false;
-  if (Ctx.getLangOpts().SizedDeallocation &&
-      (getDeclName().getCXXOverloadedOperator() == OO_Delete ||
-       getDeclName().getCXXOverloadedOperator() == OO_Array_Delete) &&
-      Ctx.hasSameType(Ty, Ctx.getSizeType())) {
-    IsSizedDelete = true;
-    Consume();
-  }
-
-  // In C++17, the next parameter can be a 'std::align_val_t' for aligned
-  // new/delete.
-  if (Ctx.getLangOpts().AlignedAllocation && !Ty.isNull() && Ty->isAlignValT()) {
-    if (IsAligned)
-      *IsAligned = true;
-    Consume();
-  }
-
-  // Finally, if this is not a sized delete, the final parameter can
-  // be a 'const std::nothrow_t&'.
-  if (!IsSizedDelete && !Ty.isNull() && Ty->isReferenceType()) {
-    Ty = Ty->getPointeeType();
-    if (Ty.getCVRQualifiers() != Qualifiers::Const)
-      return false;
-    const CXXRecordDecl *RD = Ty->getAsCXXRecordDecl();
-    if (RD && isNamed(RD, "nothrow_t") && RD->isInStdNamespace())
-      Consume();
-  }
-
-  return Params == FPT->getNumParams();
-}
-
-bool FunctionDecl::isDestroyingOperatorDelete() const {
-  // C++ P0722:
-  //   Within a class C, a single object deallocation function with signature
-  //     (T, std::destroying_delete_t, <more params>)
-  //   is a destroying operator delete.
-  if (!isa<CXXMethodDecl>(this) || getOverloadedOperator() != OO_Delete ||
-      getNumParams() < 2)
-    return false;
-
-  auto *RD = getParamDecl(1)->getType()->getAsCXXRecordDecl();
-  return RD && RD->isInStdNamespace() && RD->getIdentifier() &&
-         RD->getIdentifier()->isStr("destroying_delete_t");
-}
-
-LanguageLinkage FunctionDecl::getLanguageLinkage() const {
-  return getDeclLanguageLinkage(*this);
-}
-
-bool FunctionDecl::isExternC() const {
-  return isDeclExternC(*this);
-}
-
-bool FunctionDecl::isInExternCContext() const {
-  return getLexicalDeclContext()->isExternCContext();
-}
-
-bool FunctionDecl::isInExternCXXContext() const {
-  return getLexicalDeclContext()->isExternCXXContext();
-}
-
-bool FunctionDecl::isGlobal() const {
-  if (const auto *Method = dyn_cast<CXXMethodDecl>(this))
-    return Method->isStatic();
-
-  if (getCanonicalDecl()->getStorageClass() == SC_Static)
-    return false;
-
-  for (const DeclContext *DC = getDeclContext();
-       DC->isNamespace();
-       DC = DC->getParent()) {
-    if (const auto *Namespace = cast<NamespaceDecl>(DC)) {
-      if (!Namespace->getDeclName())
-        return false;
-      break;
-    }
-  }
-
-  return true;
-}
-
-bool FunctionDecl::isNoReturn() const {
-  if (hasAttr<NoReturnAttr>() || hasAttr<CXX11NoReturnAttr>() ||
-      hasAttr<C11NoReturnAttr>())
-    return true;
-
-  if (auto *FnTy = getType()->getAs<FunctionType>())
-    return FnTy->getNoReturnAttr();
-
-  return false;
-}
-
-
-MultiVersionKind FunctionDecl::getMultiVersionKind() const {
-  if (hasAttr<TargetAttr>())
-    return MultiVersionKind::Target;
-  if (hasAttr<CPUDispatchAttr>())
-    return MultiVersionKind::CPUDispatch;
-  if (hasAttr<CPUSpecificAttr>())
-    return MultiVersionKind::CPUSpecific;
-  return MultiVersionKind::None;
-}
-
-bool FunctionDecl::isCPUDispatchMultiVersion() const {
-  return isMultiVersion() && hasAttr<CPUDispatchAttr>();
-}
-
-bool FunctionDecl::isCPUSpecificMultiVersion() const {
-  return isMultiVersion() && hasAttr<CPUSpecificAttr>();
-}
-
-bool FunctionDecl::isTargetMultiVersion() const {
-  return isMultiVersion() && hasAttr<TargetAttr>();
-}
-
-void
-FunctionDecl::setPreviousDeclaration(FunctionDecl *PrevDecl) {
-  redeclarable_base::setPreviousDecl(PrevDecl);
-
-  if (FunctionTemplateDecl *FunTmpl = getDescribedFunctionTemplate()) {
-    FunctionTemplateDecl *PrevFunTmpl
-      = PrevDecl? PrevDecl->getDescribedFunctionTemplate() : nullptr;
-    assert((!PrevDecl || PrevFunTmpl) && "Function/function template mismatch");
-    FunTmpl->setPreviousDecl(PrevFunTmpl);
-  }
-
-  if (PrevDecl && PrevDecl->isInlined())
-    setImplicitlyInline(true);
-}
-
-FunctionDecl *FunctionDecl::getCanonicalDecl() { return getFirstDecl(); }
-
-/// Returns a value indicating whether this function
-/// corresponds to a builtin function.
-///
-/// The function corresponds to a built-in function if it is
-/// declared at translation scope or within an extern "C" block and
-/// its name matches with the name of a builtin. The returned value
-/// will be 0 for functions that do not correspond to a builtin, a
-/// value of type \c Builtin::ID if in the target-independent range
-/// \c [1,Builtin::First), or a target-specific builtin value.
-unsigned FunctionDecl::getBuiltinID() const {
-  if (!getIdentifier())
-    return 0;
-
-  unsigned BuiltinID = getIdentifier()->getBuiltinID();
-  if (!BuiltinID)
-    return 0;
-
-  ASTContext &Context = getASTContext();
-  if (Context.getLangOpts().CPlusPlus) {
-    const auto *LinkageDecl =
-        dyn_cast<LinkageSpecDecl>(getFirstDecl()->getDeclContext());
-    // In C++, the first declaration of a builtin is always inside an implicit
-    // extern "C".
-    // FIXME: A recognised library function may not be directly in an extern "C"
-    // declaration, for instance "extern "C" { namespace std { decl } }".
-    if (!LinkageDecl) {
-      if (BuiltinID == Builtin::BI__GetExceptionInfo &&
-          Context.getTargetInfo().getCXXABI().isMicrosoft())
-        return Builtin::BI__GetExceptionInfo;
-      return 0;
-    }
-    if (LinkageDecl->getLanguage() != LinkageSpecDecl::lang_c)
-      return 0;
-  }
-
-  // If the function is marked "overloadable", it has a different mangled name
-  // and is not the C library function.
-  if (hasAttr<OverloadableAttr>())
-    return 0;
-
-  if (!Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID))
-    return BuiltinID;
-
-  // This function has the name of a known C library
-  // function. Determine whether it actually refers to the C library
-  // function or whether it just has the same name.
-
-  // If this is a static function, it's not a builtin.
-  if (getStorageClass() == SC_Static)
-    return 0;
-
-  // OpenCL v1.2 s6.9.f - The library functions defined in
-  // the C99 standard headers are not available.
-  if (Context.getLangOpts().OpenCL &&
-      Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID))
-    return 0;
-
-  // CUDA does not have device-side standard library. printf and malloc are the
-  // only special cases that are supported by device-side runtime.
-  if (Context.getLangOpts().CUDA && hasAttr<CUDADeviceAttr>() &&
-      !hasAttr<CUDAHostAttr>() &&
-      !(BuiltinID == Builtin::BIprintf || BuiltinID == Builtin::BImalloc))
-    return 0;
-
-  return BuiltinID;
-}
-
-/// getNumParams - Return the number of parameters this function must have
-/// based on its FunctionType.  This is the length of the ParamInfo array
-/// after it has been created.
-unsigned FunctionDecl::getNumParams() const {
-  const auto *FPT = getType()->getAs<FunctionProtoType>();
-  return FPT ? FPT->getNumParams() : 0;
-}
-
-void FunctionDecl::setParams(ASTContext &C,
-                             ArrayRef<ParmVarDecl *> NewParamInfo) {
-  assert(!ParamInfo && "Already has param info!");
-  assert(NewParamInfo.size() == getNumParams() && "Parameter count mismatch!");
-
-  // Zero params -> null pointer.
-  if (!NewParamInfo.empty()) {
-    ParamInfo = new (C) ParmVarDecl*[NewParamInfo.size()];
-    std::copy(NewParamInfo.begin(), NewParamInfo.end(), ParamInfo);
-  }
-}
-
-/// getMinRequiredArguments - Returns the minimum number of arguments
-/// needed to call this function. This may be fewer than the number of
-/// function parameters, if some of the parameters have default
-/// arguments (in C++) or are parameter packs (C++11).
-unsigned FunctionDecl::getMinRequiredArguments() const {
-  if (!getASTContext().getLangOpts().CPlusPlus)
-    return getNumParams();
-
-  unsigned NumRequiredArgs = 0;
-  for (auto *Param : parameters())
-    if (!Param->isParameterPack() && !Param->hasDefaultArg())
-      ++NumRequiredArgs;
-  return NumRequiredArgs;
-}
-
-/// The combination of the extern and inline keywords under MSVC forces
-/// the function to be required.
-///
-/// Note: This function assumes that we will only get called when isInlined()
-/// would return true for this FunctionDecl.
-bool FunctionDecl::isMSExternInline() const {
-  assert(isInlined() && "expected to get called on an inlined function!");
-
-  const ASTContext &Context = getASTContext();
-  if (!Context.getTargetInfo().getCXXABI().isMicrosoft() &&
-      !hasAttr<DLLExportAttr>())
-    return false;
-
-  for (const FunctionDecl *FD = getMostRecentDecl(); FD;
-       FD = FD->getPreviousDecl())
-    if (!FD->isImplicit() && FD->getStorageClass() == SC_Extern)
-      return true;
-
-  return false;
-}
-
-static bool redeclForcesDefMSVC(const FunctionDecl *Redecl) {
-  if (Redecl->getStorageClass() != SC_Extern)
-    return false;
-
-  for (const FunctionDecl *FD = Redecl->getPreviousDecl(); FD;
-       FD = FD->getPreviousDecl())
-    if (!FD->isImplicit() && FD->getStorageClass() == SC_Extern)
-      return false;
-
-  return true;
-}
-
-static bool RedeclForcesDefC99(const FunctionDecl *Redecl) {
-  // Only consider file-scope declarations in this test.
-  if (!Redecl->getLexicalDeclContext()->isTranslationUnit())
-    return false;
-
-  // Only consider explicit declarations; the presence of a builtin for a
-  // libcall shouldn't affect whether a definition is externally visible.
-  if (Redecl->isImplicit())
-    return false;
-
-  if (!Redecl->isInlineSpecified() || Redecl->getStorageClass() == SC_Extern)
-    return true; // Not an inline definition
-
-  return false;
-}
-
-/// For a function declaration in C or C++, determine whether this
-/// declaration causes the definition to be externally visible.
-///
-/// For instance, this determines if adding the current declaration to the set
-/// of redeclarations of the given functions causes
-/// isInlineDefinitionExternallyVisible to change from false to true.
-bool FunctionDecl::doesDeclarationForceExternallyVisibleDefinition() const {
-  assert(!doesThisDeclarationHaveABody() &&
-         "Must have a declaration without a body.");
-
-  ASTContext &Context = getASTContext();
-
-  if (Context.getLangOpts().MSVCCompat) {
-    const FunctionDecl *Definition;
-    if (hasBody(Definition) && Definition->isInlined() &&
-        redeclForcesDefMSVC(this))
-      return true;
-  }
-
-  if (Context.getLangOpts().GNUInline || hasAttr<GNUInlineAttr>()) {
-    // With GNU inlining, a declaration with 'inline' but not 'extern', forces
-    // an externally visible definition.
-    //
-    // FIXME: What happens if gnu_inline gets added on after the first
-    // declaration?
-    if (!isInlineSpecified() || getStorageClass() == SC_Extern)
-      return false;
-
-    const FunctionDecl *Prev = this;
-    bool FoundBody = false;
-    while ((Prev = Prev->getPreviousDecl())) {
-      FoundBody |= Prev->Body.isValid();
-
-      if (Prev->Body) {
-        // If it's not the case that both 'inline' and 'extern' are
-        // specified on the definition, then it is always externally visible.
-        if (!Prev->isInlineSpecified() ||
-            Prev->getStorageClass() != SC_Extern)
-          return false;
-      } else if (Prev->isInlineSpecified() &&
-                 Prev->getStorageClass() != SC_Extern) {
-        return false;
-      }
-    }
-    return FoundBody;
-  }
-
-  if (Context.getLangOpts().CPlusPlus)
-    return false;
-
-  // C99 6.7.4p6:
-  //   [...] If all of the file scope declarations for a function in a
-  //   translation unit include the inline function specifier without extern,
-  //   then the definition in that translation unit is an inline definition.
-  if (isInlineSpecified() && getStorageClass() != SC_Extern)
-    return false;
-  const FunctionDecl *Prev = this;
-  bool FoundBody = false;
-  while ((Prev = Prev->getPreviousDecl())) {
-    FoundBody |= Prev->Body.isValid();
-    if (RedeclForcesDefC99(Prev))
-      return false;
-  }
-  return FoundBody;
-}
-
-SourceRange FunctionDecl::getReturnTypeSourceRange() const {
-  const TypeSourceInfo *TSI = getTypeSourceInfo();
-  if (!TSI)
-    return SourceRange();
-  FunctionTypeLoc FTL =
-      TSI->getTypeLoc().IgnoreParens().getAs<FunctionTypeLoc>();
-  if (!FTL)
-    return SourceRange();
-
-  // Skip self-referential return types.
-  const SourceManager &SM = getASTContext().getSourceManager();
-  SourceRange RTRange = FTL.getReturnLoc().getSourceRange();
-  SourceLocation Boundary = getNameInfo().getBeginLoc();
-  if (RTRange.isInvalid() || Boundary.isInvalid() ||
-      !SM.isBeforeInTranslationUnit(RTRange.getEnd(), Boundary))
-    return SourceRange();
-
-  return RTRange;
-}
-
-SourceRange FunctionDecl::getExceptionSpecSourceRange() const {
-  const TypeSourceInfo *TSI = getTypeSourceInfo();
-  if (!TSI)
-    return SourceRange();
-  FunctionTypeLoc FTL =
-    TSI->getTypeLoc().IgnoreParens().getAs<FunctionTypeLoc>();
-  if (!FTL)
-    return SourceRange();
-
-  return FTL.getExceptionSpecRange();
-}
-
-/// For an inline function definition in C, or for a gnu_inline function
-/// in C++, determine whether the definition will be externally visible.
-///
-/// Inline function definitions are always available for inlining optimizations.
-/// However, depending on the language dialect, declaration specifiers, and
-/// attributes, the definition of an inline function may or may not be
-/// "externally" visible to other translation units in the program.
-///
-/// In C99, inline definitions are not externally visible by default. However,
-/// if even one of the global-scope declarations is marked "extern inline", the
-/// inline definition becomes externally visible (C99 6.7.4p6).
-///
-/// In GNU89 mode, or if the gnu_inline attribute is attached to the function
-/// definition, we use the GNU semantics for inline, which are nearly the
-/// opposite of C99 semantics. In particular, "inline" by itself will create
-/// an externally visible symbol, but "extern inline" will not create an
-/// externally visible symbol.
-bool FunctionDecl::isInlineDefinitionExternallyVisible() const {
-  assert((doesThisDeclarationHaveABody() || willHaveBody()) &&
-         "Must be a function definition");
-  assert(isInlined() && "Function must be inline");
-  ASTContext &Context = getASTContext();
-
-  if (Context.getLangOpts().GNUInline || hasAttr<GNUInlineAttr>()) {
-    // Note: If you change the logic here, please change
-    // doesDeclarationForceExternallyVisibleDefinition as well.
-    //
-    // If it's not the case that both 'inline' and 'extern' are
-    // specified on the definition, then this inline definition is
-    // externally visible.
-    if (!(isInlineSpecified() && getStorageClass() == SC_Extern))
-      return true;
-
-    // If any declaration is 'inline' but not 'extern', then this definition
-    // is externally visible.
-    for (auto Redecl : redecls()) {
-      if (Redecl->isInlineSpecified() &&
-          Redecl->getStorageClass() != SC_Extern)
-        return true;
-    }
-
-    return false;
-  }
-
-  // The rest of this function is C-only.
-  assert(!Context.getLangOpts().CPlusPlus &&
-         "should not use C inline rules in C++");
-
-  // C99 6.7.4p6:
-  //   [...] If all of the file scope declarations for a function in a
-  //   translation unit include the inline function specifier without extern,
-  //   then the definition in that translation unit is an inline definition.
-  for (auto Redecl : redecls()) {
-    if (RedeclForcesDefC99(Redecl))
-      return true;
-  }
-
-  // C99 6.7.4p6:
-  //   An inline definition does not provide an external definition for the
-  //   function, and does not forbid an external definition in another
-  //   translation unit.
-  return false;
-}
-
-/// getOverloadedOperator - Which C++ overloaded operator this
-/// function represents, if any.
-OverloadedOperatorKind FunctionDecl::getOverloadedOperator() const {
-  if (getDeclName().getNameKind() == DeclarationName::CXXOperatorName)
-    return getDeclName().getCXXOverloadedOperator();
-  else
-    return OO_None;
-}
-
-/// getLiteralIdentifier - The literal suffix identifier this function
-/// represents, if any.
-const IdentifierInfo *FunctionDecl::getLiteralIdentifier() const {
-  if (getDeclName().getNameKind() == DeclarationName::CXXLiteralOperatorName)
-    return getDeclName().getCXXLiteralIdentifier();
-  else
-    return nullptr;
-}
-
-FunctionDecl::TemplatedKind FunctionDecl::getTemplatedKind() const {
-  if (TemplateOrSpecialization.isNull())
-    return TK_NonTemplate;
-  if (TemplateOrSpecialization.is<FunctionTemplateDecl *>())
-    return TK_FunctionTemplate;
-  if (TemplateOrSpecialization.is<MemberSpecializationInfo *>())
-    return TK_MemberSpecialization;
-  if (TemplateOrSpecialization.is<FunctionTemplateSpecializationInfo *>())
-    return TK_FunctionTemplateSpecialization;
-  if (TemplateOrSpecialization.is
-                               <DependentFunctionTemplateSpecializationInfo*>())
-    return TK_DependentFunctionTemplateSpecialization;
-
-  llvm_unreachable("Did we miss a TemplateOrSpecialization type?");
-}
-
-FunctionDecl *FunctionDecl::getInstantiatedFromMemberFunction() const {
-  if (MemberSpecializationInfo *Info = getMemberSpecializationInfo())
-    return cast<FunctionDecl>(Info->getInstantiatedFrom());
-
-  return nullptr;
-}
-
-MemberSpecializationInfo *FunctionDecl::getMemberSpecializationInfo() const {
-  return TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo *>();
-}
-
-void
-FunctionDecl::setInstantiationOfMemberFunction(ASTContext &C,
-                                               FunctionDecl *FD,
-                                               TemplateSpecializationKind TSK) {
-  assert(TemplateOrSpecialization.isNull() &&
-         "Member function is already a specialization");
-  MemberSpecializationInfo *Info
-    = new (C) MemberSpecializationInfo(FD, TSK);
-  TemplateOrSpecialization = Info;
-}
-
-FunctionTemplateDecl *FunctionDecl::getDescribedFunctionTemplate() const {
-  return TemplateOrSpecialization.dyn_cast<FunctionTemplateDecl *>();
-}
-
-void FunctionDecl::setDescribedFunctionTemplate(FunctionTemplateDecl *Template) {
-  TemplateOrSpecialization = Template;
-}
-
-bool FunctionDecl::isImplicitlyInstantiable() const {
-  // If the function is invalid, it can't be implicitly instantiated.
-  if (isInvalidDecl())
-    return false;
-
-  switch (getTemplateSpecializationKind()) {
-  case TSK_Undeclared:
-  case TSK_ExplicitInstantiationDefinition:
-    return false;
-
-  case TSK_ImplicitInstantiation:
-    return true;
-
-  // It is possible to instantiate TSK_ExplicitSpecialization kind
-  // if the FunctionDecl has a class scope specialization pattern.
-  case TSK_ExplicitSpecialization:
-    return getClassScopeSpecializationPattern() != nullptr;
-
-  case TSK_ExplicitInstantiationDeclaration:
-    // Handled below.
-    break;
-  }
-
-  // Find the actual template from which we will instantiate.
-  const FunctionDecl *PatternDecl = getTemplateInstantiationPattern();
-  bool HasPattern = false;
-  if (PatternDecl)
-    HasPattern = PatternDecl->hasBody(PatternDecl);
-
-  // C++0x [temp.explicit]p9:
-  //   Except for inline functions, other explicit instantiation declarations
-  //   have the effect of suppressing the implicit instantiation of the entity
-  //   to which they refer.
-  if (!HasPattern || !PatternDecl)
-    return true;
-
-  return PatternDecl->isInlined();
-}
-
-bool FunctionDecl::isTemplateInstantiation() const {
-  switch (getTemplateSpecializationKind()) {
-    case TSK_Undeclared:
-    case TSK_ExplicitSpecialization:
-      return false;
-    case TSK_ImplicitInstantiation:
-    case TSK_ExplicitInstantiationDeclaration:
-    case TSK_ExplicitInstantiationDefinition:
-      return true;
-  }
-  llvm_unreachable("All TSK values handled.");
-}
-
-FunctionDecl *FunctionDecl::getTemplateInstantiationPattern() const {
-  // Handle class scope explicit specialization special case.
-  if (getTemplateSpecializationKind() == TSK_ExplicitSpecialization) {
-    if (auto *Spec = getClassScopeSpecializationPattern())
-      return getDefinitionOrSelf(Spec);
-    return nullptr;
-  }
-
-  // If this is a generic lambda call operator specialization, its
-  // instantiation pattern is always its primary template's pattern
-  // even if its primary template was instantiated from another
-  // member template (which happens with nested generic lambdas).
-  // Since a lambda's call operator's body is transformed eagerly,
-  // we don't have to go hunting for a prototype definition template
-  // (i.e. instantiated-from-member-template) to use as an instantiation
-  // pattern.
-
-  if (isGenericLambdaCallOperatorSpecialization(
-          dyn_cast<CXXMethodDecl>(this))) {
-    assert(getPrimaryTemplate() && "not a generic lambda call operator?");
-    return getDefinitionOrSelf(getPrimaryTemplate()->getTemplatedDecl());
-  }
-
-  if (FunctionTemplateDecl *Primary = getPrimaryTemplate()) {
-    while (Primary->getInstantiatedFromMemberTemplate()) {
-      // If we have hit a point where the user provided a specialization of
-      // this template, we're done looking.
-      if (Primary->isMemberSpecialization())
-        break;
-      Primary = Primary->getInstantiatedFromMemberTemplate();
-    }
-
-    return getDefinitionOrSelf(Primary->getTemplatedDecl());
-  }
-
-  if (auto *MFD = getInstantiatedFromMemberFunction())
-    return getDefinitionOrSelf(MFD);
-
-  return nullptr;
-}
-
-FunctionTemplateDecl *FunctionDecl::getPrimaryTemplate() const {
-  if (FunctionTemplateSpecializationInfo *Info
-        = TemplateOrSpecialization
-            .dyn_cast<FunctionTemplateSpecializationInfo*>()) {
-    return Info->Template.getPointer();
-  }
-  return nullptr;
-}
-
-FunctionDecl *FunctionDecl::getClassScopeSpecializationPattern() const {
-    return getASTContext().getClassScopeSpecializationPattern(this);
-}
-
-FunctionTemplateSpecializationInfo *
-FunctionDecl::getTemplateSpecializationInfo() const {
-  return TemplateOrSpecialization
-      .dyn_cast<FunctionTemplateSpecializationInfo *>();
-}
-
-const TemplateArgumentList *
-FunctionDecl::getTemplateSpecializationArgs() const {
-  if (FunctionTemplateSpecializationInfo *Info
-        = TemplateOrSpecialization
-            .dyn_cast<FunctionTemplateSpecializationInfo*>()) {
-    return Info->TemplateArguments;
-  }
-  return nullptr;
-}
-
-const ASTTemplateArgumentListInfo *
-FunctionDecl::getTemplateSpecializationArgsAsWritten() const {
-  if (FunctionTemplateSpecializationInfo *Info
-        = TemplateOrSpecialization
-            .dyn_cast<FunctionTemplateSpecializationInfo*>()) {
-    return Info->TemplateArgumentsAsWritten;
-  }
-  return nullptr;
-}
-
-void
-FunctionDecl::setFunctionTemplateSpecialization(ASTContext &C,
-                                                FunctionTemplateDecl *Template,
-                                     const TemplateArgumentList *TemplateArgs,
-                                                void *InsertPos,
-                                                TemplateSpecializationKind TSK,
-                        const TemplateArgumentListInfo *TemplateArgsAsWritten,
-                                          SourceLocation PointOfInstantiation) {
-  assert(TSK != TSK_Undeclared &&
-         "Must specify the type of function template specialization");
-  FunctionTemplateSpecializationInfo *Info
-    = TemplateOrSpecialization.dyn_cast<FunctionTemplateSpecializationInfo*>();
-  if (!Info)
-    Info = FunctionTemplateSpecializationInfo::Create(C, this, Template, TSK,
-                                                      TemplateArgs,
-                                                      TemplateArgsAsWritten,
-                                                      PointOfInstantiation);
-  TemplateOrSpecialization = Info;
-  Template->addSpecialization(Info, InsertPos);
-}
-
-void
-FunctionDecl::setDependentTemplateSpecialization(ASTContext &Context,
-                                    const UnresolvedSetImpl &Templates,
-                             const TemplateArgumentListInfo &TemplateArgs) {
-  assert(TemplateOrSpecialization.isNull());
-  DependentFunctionTemplateSpecializationInfo *Info =
-      DependentFunctionTemplateSpecializationInfo::Create(Context, Templates,
-                                                          TemplateArgs);
-  TemplateOrSpecialization = Info;
-}
-
-DependentFunctionTemplateSpecializationInfo *
-FunctionDecl::getDependentSpecializationInfo() const {
-  return TemplateOrSpecialization
-      .dyn_cast<DependentFunctionTemplateSpecializationInfo *>();
-}
-
-DependentFunctionTemplateSpecializationInfo *
-DependentFunctionTemplateSpecializationInfo::Create(
-    ASTContext &Context, const UnresolvedSetImpl &Ts,
-    const TemplateArgumentListInfo &TArgs) {
-  void *Buffer = Context.Allocate(
-      totalSizeToAlloc<TemplateArgumentLoc, FunctionTemplateDecl *>(
-          TArgs.size(), Ts.size()));
-  return new (Buffer) DependentFunctionTemplateSpecializationInfo(Ts, TArgs);
-}
-
-DependentFunctionTemplateSpecializationInfo::
-DependentFunctionTemplateSpecializationInfo(const UnresolvedSetImpl &Ts,
-                                      const TemplateArgumentListInfo &TArgs)
-  : AngleLocs(TArgs.getLAngleLoc(), TArgs.getRAngleLoc()) {
-  NumTemplates = Ts.size();
-  NumArgs = TArgs.size();
-
-  FunctionTemplateDecl **TsArray = getTrailingObjects<FunctionTemplateDecl *>();
-  for (unsigned I = 0, E = Ts.size(); I != E; ++I)
-    TsArray[I] = cast<FunctionTemplateDecl>(Ts[I]->getUnderlyingDecl());
-
-  TemplateArgumentLoc *ArgsArray = getTrailingObjects<TemplateArgumentLoc>();
-  for (unsigned I = 0, E = TArgs.size(); I != E; ++I)
-    new (&ArgsArray[I]) TemplateArgumentLoc(TArgs[I]);
-}
-
-TemplateSpecializationKind FunctionDecl::getTemplateSpecializationKind() const {
-  // For a function template specialization, query the specialization
-  // information object.
-  FunctionTemplateSpecializationInfo *FTSInfo
-    = TemplateOrSpecialization.dyn_cast<FunctionTemplateSpecializationInfo*>();
-  if (FTSInfo)
-    return FTSInfo->getTemplateSpecializationKind();
-
-  MemberSpecializationInfo *MSInfo
-    = TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo*>();
-  if (MSInfo)
-    return MSInfo->getTemplateSpecializationKind();
-
-  return TSK_Undeclared;
-}
-
-void
-FunctionDecl::setTemplateSpecializationKind(TemplateSpecializationKind TSK,
-                                          SourceLocation PointOfInstantiation) {
-  if (FunctionTemplateSpecializationInfo *FTSInfo
-        = TemplateOrSpecialization.dyn_cast<
-                                    FunctionTemplateSpecializationInfo*>()) {
-    FTSInfo->setTemplateSpecializationKind(TSK);
-    if (TSK != TSK_ExplicitSpecialization &&
-        PointOfInstantiation.isValid() &&
-        FTSInfo->getPointOfInstantiation().isInvalid()) {
-      FTSInfo->setPointOfInstantiation(PointOfInstantiation);
-      if (ASTMutationListener *L = getASTContext().getASTMutationListener())
-        L->InstantiationRequested(this);
-    }
-  } else if (MemberSpecializationInfo *MSInfo
-             = TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo*>()) {
-    MSInfo->setTemplateSpecializationKind(TSK);
-    if (TSK != TSK_ExplicitSpecialization &&
-        PointOfInstantiation.isValid() &&
-        MSInfo->getPointOfInstantiation().isInvalid()) {
-      MSInfo->setPointOfInstantiation(PointOfInstantiation);
-      if (ASTMutationListener *L = getASTContext().getASTMutationListener())
-        L->InstantiationRequested(this);
-    }
-  } else
-    llvm_unreachable("Function cannot have a template specialization kind");
-}
-
-SourceLocation FunctionDecl::getPointOfInstantiation() const {
-  if (FunctionTemplateSpecializationInfo *FTSInfo
-        = TemplateOrSpecialization.dyn_cast<
-                                        FunctionTemplateSpecializationInfo*>())
-    return FTSInfo->getPointOfInstantiation();
-  else if (MemberSpecializationInfo *MSInfo
-             = TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo*>())
-    return MSInfo->getPointOfInstantiation();
-
-  return SourceLocation();
-}
-
-bool FunctionDecl::isOutOfLine() const {
-  if (Decl::isOutOfLine())
-    return true;
-
-  // If this function was instantiated from a member function of a
-  // class template, check whether that member function was defined out-of-line.
-  if (FunctionDecl *FD = getInstantiatedFromMemberFunction()) {
-    const FunctionDecl *Definition;
-    if (FD->hasBody(Definition))
-      return Definition->isOutOfLine();
-  }
-
-  // If this function was instantiated from a function template,
-  // check whether that function template was defined out-of-line.
-  if (FunctionTemplateDecl *FunTmpl = getPrimaryTemplate()) {
-    const FunctionDecl *Definition;
-    if (FunTmpl->getTemplatedDecl()->hasBody(Definition))
-      return Definition->isOutOfLine();
-  }
-
-  return false;
-}
-
-SourceRange FunctionDecl::getSourceRange() const {
-  return SourceRange(getOuterLocStart(), EndRangeLoc);
-}
-
-unsigned FunctionDecl::getMemoryFunctionKind() const {
-  IdentifierInfo *FnInfo = getIdentifier();
-
-  if (!FnInfo)
-    return 0;
-
-  // Builtin handling.
-  switch (getBuiltinID()) {
-  case Builtin::BI__builtin_memset:
-  case Builtin::BI__builtin___memset_chk:
-  case Builtin::BImemset:
-    return Builtin::BImemset;
-
-  case Builtin::BI__builtin_memcpy:
-  case Builtin::BI__builtin___memcpy_chk:
-  case Builtin::BImemcpy:
-    return Builtin::BImemcpy;
-
-  case Builtin::BI__builtin_memmove:
-  case Builtin::BI__builtin___memmove_chk:
-  case Builtin::BImemmove:
-    return Builtin::BImemmove;
-
-  case Builtin::BIstrlcpy:
-  case Builtin::BI__builtin___strlcpy_chk:
-    return Builtin::BIstrlcpy;
-
-  case Builtin::BIstrlcat:
-  case Builtin::BI__builtin___strlcat_chk:
-    return Builtin::BIstrlcat;
-
-  case Builtin::BI__builtin_memcmp:
-  case Builtin::BImemcmp:
-    return Builtin::BImemcmp;
-
-  case Builtin::BI__builtin_strncpy:
-  case Builtin::BI__builtin___strncpy_chk:
-  case Builtin::BIstrncpy:
-    return Builtin::BIstrncpy;
-
-  case Builtin::BI__builtin_strncmp:
-  case Builtin::BIstrncmp:
-    return Builtin::BIstrncmp;
-
-  case Builtin::BI__builtin_strncasecmp:
-  case Builtin::BIstrncasecmp:
-    return Builtin::BIstrncasecmp;
-
-  case Builtin::BI__builtin_strncat:
-  case Builtin::BI__builtin___strncat_chk:
-  case Builtin::BIstrncat:
-    return Builtin::BIstrncat;
-
-  case Builtin::BI__builtin_strndup:
-  case Builtin::BIstrndup:
-    return Builtin::BIstrndup;
-
-  case Builtin::BI__builtin_strlen:
-  case Builtin::BIstrlen:
-    return Builtin::BIstrlen;
-
-  case Builtin::BI__builtin_bzero:
-  case Builtin::BIbzero:
-    return Builtin::BIbzero;
-
-  default:
-    if (isExternC()) {
-      if (FnInfo->isStr("memset"))
-        return Builtin::BImemset;
-      else if (FnInfo->isStr("memcpy"))
-        return Builtin::BImemcpy;
-      else if (FnInfo->isStr("memmove"))
-        return Builtin::BImemmove;
-      else if (FnInfo->isStr("memcmp"))
-        return Builtin::BImemcmp;
-      else if (FnInfo->isStr("strncpy"))
-        return Builtin::BIstrncpy;
-      else if (FnInfo->isStr("strncmp"))
-        return Builtin::BIstrncmp;
-      else if (FnInfo->isStr("strncasecmp"))
-        return Builtin::BIstrncasecmp;
-      else if (FnInfo->isStr("strncat"))
-        return Builtin::BIstrncat;
-      else if (FnInfo->isStr("strndup"))
-        return Builtin::BIstrndup;
-      else if (FnInfo->isStr("strlen"))
-        return Builtin::BIstrlen;
-      else if (FnInfo->isStr("bzero"))
-        return Builtin::BIbzero;
-    }
-    break;
-  }
-  return 0;
-}
-
-unsigned FunctionDecl::getODRHash() const {
-  assert(hasODRHash());
-  return ODRHash;
-}
-
-unsigned FunctionDecl::getODRHash() {
-  if (hasODRHash())
-    return ODRHash;
-
-  if (auto *FT = getInstantiatedFromMemberFunction()) {
-    setHasODRHash(true);
-    ODRHash = FT->getODRHash();
-    return ODRHash;
-  }
-
-  class ODRHash Hash;
-  Hash.AddFunctionDecl(this);
-  setHasODRHash(true);
-  ODRHash = Hash.CalculateHash();
-  return ODRHash;
-}
-
-//===----------------------------------------------------------------------===//
-// FieldDecl Implementation
-//===----------------------------------------------------------------------===//
-
-FieldDecl *FieldDecl::Create(const ASTContext &C, DeclContext *DC,
-                             SourceLocation StartLoc, SourceLocation IdLoc,
-                             IdentifierInfo *Id, QualType T,
-                             TypeSourceInfo *TInfo, Expr *BW, bool Mutable,
-                             InClassInitStyle InitStyle) {
-  return new (C, DC) FieldDecl(Decl::Field, DC, StartLoc, IdLoc, Id, T, TInfo,
-                               BW, Mutable, InitStyle);
-}
-
-FieldDecl *FieldDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
-  return new (C, ID) FieldDecl(Field, nullptr, SourceLocation(),
-                               SourceLocation(), nullptr, QualType(), nullptr,
-                               nullptr, false, ICIS_NoInit);
-}
-
-bool FieldDecl::isAnonymousStructOrUnion() const {
-  if (!isImplicit() || getDeclName())
-    return false;
-
-  if (const auto *Record = getType()->getAs<RecordType>())
-    return Record->getDecl()->isAnonymousStructOrUnion();
-
-  return false;
-}
-
-unsigned FieldDecl::getBitWidthValue(const ASTContext &Ctx) const {
-  assert(isBitField() && "not a bitfield");
-  return getBitWidth()->EvaluateKnownConstInt(Ctx).getZExtValue();
-}
-
-bool FieldDecl::isZeroLengthBitField(const ASTContext &Ctx) const {
-  return isUnnamedBitfield() && !getBitWidth()->isValueDependent() &&
-         getBitWidthValue(Ctx) == 0;
-}
-
-unsigned FieldDecl::getFieldIndex() const {
-  const FieldDecl *Canonical = getCanonicalDecl();
-  if (Canonical != this)
-    return Canonical->getFieldIndex();
-
-  if (CachedFieldIndex) return CachedFieldIndex - 1;
-
-  unsigned Index = 0;
-  const RecordDecl *RD = getParent()->getDefinition();
-  assert(RD && "requested index for field of struct with no definition");
-
-  for (auto *Field : RD->fields()) {
-    Field->getCanonicalDecl()->CachedFieldIndex = Index + 1;
-    ++Index;
-  }
-
-  assert(CachedFieldIndex && "failed to find field in parent");
-  return CachedFieldIndex - 1;
-}
-
-SourceRange FieldDecl::getSourceRange() const {
-  const Expr *FinalExpr = getInClassInitializer();
-  if (!FinalExpr)
-    FinalExpr = getBitWidth();
-  if (FinalExpr)
-    return SourceRange(getInnerLocStart(), FinalExpr->getEndLoc());
-  return DeclaratorDecl::getSourceRange();
-}
-
-void FieldDecl::setCapturedVLAType(const VariableArrayType *VLAType) {
-  assert((getParent()->isLambda() || getParent()->isCapturedRecord()) &&
-         "capturing type in non-lambda or captured record.");
-  assert(InitStorage.getInt() == ISK_NoInit &&
-         InitStorage.getPointer() == nullptr &&
-         "bit width, initializer or captured type already set");
-  InitStorage.setPointerAndInt(const_cast<VariableArrayType *>(VLAType),
-                               ISK_CapturedVLAType);
-}
-
-//===----------------------------------------------------------------------===//
-// TagDecl Implementation
-//===----------------------------------------------------------------------===//
-
-TagDecl::TagDecl(Kind DK, TagKind TK, const ASTContext &C, DeclContext *DC,
-                 SourceLocation L, IdentifierInfo *Id, TagDecl *PrevDecl,
-                 SourceLocation StartL)
-    : TypeDecl(DK, DC, L, Id, StartL), DeclContext(DK), redeclarable_base(C),
-      TypedefNameDeclOrQualifier((TypedefNameDecl *)nullptr) {
-  assert((DK != Enum || TK == TTK_Enum) &&
-         "EnumDecl not matched with TTK_Enum");
-  setPreviousDecl(PrevDecl);
-  setTagKind(TK);
-  setCompleteDefinition(false);
-  setBeingDefined(false);
-  setEmbeddedInDeclarator(false);
-  setFreeStanding(false);
-  setCompleteDefinitionRequired(false);
-}
-
-SourceLocation TagDecl::getOuterLocStart() const {
-  return getTemplateOrInnerLocStart(this);
-}
-
-SourceRange TagDecl::getSourceRange() const {
-  SourceLocation RBraceLoc = BraceRange.getEnd();
-  SourceLocation E = RBraceLoc.isValid() ? RBraceLoc : getLocation();
-  return SourceRange(getOuterLocStart(), E);
-}
-
-TagDecl *TagDecl::getCanonicalDecl() { return getFirstDecl(); }
-
-void TagDecl::setTypedefNameForAnonDecl(TypedefNameDecl *TDD) {
-  TypedefNameDeclOrQualifier = TDD;
-  if (const Type *T = getTypeForDecl()) {
-    (void)T;
-    assert(T->isLinkageValid());
-  }
-  assert(isLinkageValid());
-}
-
-void TagDecl::startDefinition() {
-  setBeingDefined(true);
-
-  if (auto *D = dyn_cast<CXXRecordDecl>(this)) {
-    struct CXXRecordDecl::DefinitionData *Data =
-      new (getASTContext()) struct CXXRecordDecl::DefinitionData(D);
-    for (auto I : redecls())
-      cast<CXXRecordDecl>(I)->DefinitionData = Data;
-  }
-}
-
-void TagDecl::completeDefinition() {
-  assert((!isa<CXXRecordDecl>(this) ||
-          cast<CXXRecordDecl>(this)->hasDefinition()) &&
-         "definition completed but not started");
-
-  setCompleteDefinition(true);
-  setBeingDefined(false);
-
-  if (ASTMutationListener *L = getASTMutationListener())
-    L->CompletedTagDefinition(this);
-}
-
-TagDecl *TagDecl::getDefinition() const {
-  if (isCompleteDefinition())
-    return const_cast<TagDecl *>(this);
-
-  // If it's possible for us to have an out-of-date definition, check now.
-  if (mayHaveOutOfDateDef()) {
-    if (IdentifierInfo *II = getIdentifier()) {
-      if (II->isOutOfDate()) {
-        updateOutOfDate(*II);
-      }
-    }
-  }
-
-  if (const auto *CXXRD = dyn_cast<CXXRecordDecl>(this))
-    return CXXRD->getDefinition();
-
-  for (auto R : redecls())
-    if (R->isCompleteDefinition())
-      return R;
-
-  return nullptr;
-}
-
-void TagDecl::setQualifierInfo(NestedNameSpecifierLoc QualifierLoc) {
-  if (QualifierLoc) {
-    // Make sure the extended qualifier info is allocated.
-    if (!hasExtInfo())
-      TypedefNameDeclOrQualifier = new (getASTContext()) ExtInfo;
-    // Set qualifier info.
-    getExtInfo()->QualifierLoc = QualifierLoc;
-  } else {
-    // Here Qualifier == 0, i.e., we are removing the qualifier (if any).
-    if (hasExtInfo()) {
-      if (getExtInfo()->NumTemplParamLists == 0) {
-        getASTContext().Deallocate(getExtInfo());
-        TypedefNameDeclOrQualifier = (TypedefNameDecl *)nullptr;
-      }
-      else
-        getExtInfo()->QualifierLoc = QualifierLoc;
-    }
-  }
-}
-
-void TagDecl::setTemplateParameterListsInfo(
-    ASTContext &Context, ArrayRef<TemplateParameterList *> TPLists) {
-  assert(!TPLists.empty());
-  // Make sure the extended decl info is allocated.
-  if (!hasExtInfo())
-    // Allocate external info struct.
-    TypedefNameDeclOrQualifier = new (getASTContext()) ExtInfo;
-  // Set the template parameter lists info.
-  getExtInfo()->setTemplateParameterListsInfo(Context, TPLists);
-}
-
-//===----------------------------------------------------------------------===//
-// EnumDecl Implementation
-//===----------------------------------------------------------------------===//
-
-EnumDecl::EnumDecl(ASTContext &C, DeclContext *DC, SourceLocation StartLoc,
-                   SourceLocation IdLoc, IdentifierInfo *Id, EnumDecl *PrevDecl,
-                   bool Scoped, bool ScopedUsingClassTag, bool Fixed)
-    : TagDecl(Enum, TTK_Enum, C, DC, IdLoc, Id, PrevDecl, StartLoc) {
-  assert(Scoped || !ScopedUsingClassTag);
-  IntegerType = nullptr;
-  setNumPositiveBits(0);
-  setNumNegativeBits(0);
-  setScoped(Scoped);
-  setScopedUsingClassTag(ScopedUsingClassTag);
-  setFixed(Fixed);
-  setHasODRHash(false);
-  ODRHash = 0;
-}
-
-void EnumDecl::anchor() {}
-
-EnumDecl *EnumDecl::Create(ASTContext &C, DeclContext *DC,
-                           SourceLocation StartLoc, SourceLocation IdLoc,
-                           IdentifierInfo *Id,
-                           EnumDecl *PrevDecl, bool IsScoped,
-                           bool IsScopedUsingClassTag, bool IsFixed) {
-  auto *Enum = new (C, DC) EnumDecl(C, DC, StartLoc, IdLoc, Id, PrevDecl,
-                                    IsScoped, IsScopedUsingClassTag, IsFixed);
-  Enum->setMayHaveOutOfDateDef(C.getLangOpts().Modules);
-  C.getTypeDeclType(Enum, PrevDecl);
-  return Enum;
-}
-
-EnumDecl *EnumDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
-  EnumDecl *Enum =
-      new (C, ID) EnumDecl(C, nullptr, SourceLocation(), SourceLocation(),
-                           nullptr, nullptr, false, false, false);
-  Enum->setMayHaveOutOfDateDef(C.getLangOpts().Modules);
-  return Enum;
-}
-
-SourceRange EnumDecl::getIntegerTypeRange() const {
-  if (const TypeSourceInfo *TI = getIntegerTypeSourceInfo())
-    return TI->getTypeLoc().getSourceRange();
-  return SourceRange();
-}
-
-void EnumDecl::completeDefinition(QualType NewType,
-                                  QualType NewPromotionType,
-                                  unsigned NumPositiveBits,
-                                  unsigned NumNegativeBits) {
-  assert(!isCompleteDefinition() && "Cannot redefine enums!");
-  if (!IntegerType)
-    IntegerType = NewType.getTypePtr();
-  PromotionType = NewPromotionType;
-  setNumPositiveBits(NumPositiveBits);
-  setNumNegativeBits(NumNegativeBits);
-  TagDecl::completeDefinition();
-}
-
-bool EnumDecl::isClosed() const {
-  if (const auto *A = getAttr<EnumExtensibilityAttr>())
-    return A->getExtensibility() == EnumExtensibilityAttr::Closed;
-  return true;
-}
-
-bool EnumDecl::isClosedFlag() const {
-  return isClosed() && hasAttr<FlagEnumAttr>();
-}
-
-bool EnumDecl::isClosedNonFlag() const {
-  return isClosed() && !hasAttr<FlagEnumAttr>();
-}
-
-TemplateSpecializationKind EnumDecl::getTemplateSpecializationKind() const {
-  if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo())
-    return MSI->getTemplateSpecializationKind();
-
-  return TSK_Undeclared;
-}
-
-void EnumDecl::setTemplateSpecializationKind(TemplateSpecializationKind TSK,
-                                         SourceLocation PointOfInstantiation) {
-  MemberSpecializationInfo *MSI = getMemberSpecializationInfo();
-  assert(MSI && "Not an instantiated member enumeration?");
-  MSI->setTemplateSpecializationKind(TSK);
-  if (TSK != TSK_ExplicitSpecialization &&
-      PointOfInstantiation.isValid() &&
-      MSI->getPointOfInstantiation().isInvalid())
-    MSI->setPointOfInstantiation(PointOfInstantiation);
-}
-
-EnumDecl *EnumDecl::getTemplateInstantiationPattern() const {
-  if (MemberSpecializationInfo *MSInfo = getMemberSpecializationInfo()) {
-    if (isTemplateInstantiation(MSInfo->getTemplateSpecializationKind())) {
-      EnumDecl *ED = getInstantiatedFromMemberEnum();
-      while (auto *NewED = ED->getInstantiatedFromMemberEnum())
-        ED = NewED;
-      return getDefinitionOrSelf(ED);
-    }
-  }
-
-  assert(!isTemplateInstantiation(getTemplateSpecializationKind()) &&
-         "couldn't find pattern for enum instantiation");
-  return nullptr;
-}
-
-EnumDecl *EnumDecl::getInstantiatedFromMemberEnum() const {
-  if (SpecializationInfo)
-    return cast<EnumDecl>(SpecializationInfo->getInstantiatedFrom());
-
-  return nullptr;
-}
-
-void EnumDecl::setInstantiationOfMemberEnum(ASTContext &C, EnumDecl *ED,
-                                            TemplateSpecializationKind TSK) {
-  assert(!SpecializationInfo && "Member enum is already a specialization");
-  SpecializationInfo = new (C) MemberSpecializationInfo(ED, TSK);
-}
-
-unsigned EnumDecl::getODRHash() {
-  if (hasODRHash())
-    return ODRHash;
-
-  class ODRHash Hash;
-  Hash.AddEnumDecl(this);
-  setHasODRHash(true);
-  ODRHash = Hash.CalculateHash();
-  return ODRHash;
-}
-
-//===----------------------------------------------------------------------===//
-// RecordDecl Implementation
-//===----------------------------------------------------------------------===//
-
-RecordDecl::RecordDecl(Kind DK, TagKind TK, const ASTContext &C,
-                       DeclContext *DC, SourceLocation StartLoc,
-                       SourceLocation IdLoc, IdentifierInfo *Id,
-                       RecordDecl *PrevDecl)
-    : TagDecl(DK, TK, C, DC, IdLoc, Id, PrevDecl, StartLoc) {
-  assert(classof(static_cast<Decl *>(this)) && "Invalid Kind!");
-  setHasFlexibleArrayMember(false);
-  setAnonymousStructOrUnion(false);
-  setHasObjectMember(false);
-  setHasVolatileMember(false);
-  setHasLoadedFieldsFromExternalStorage(false);
-  setNonTrivialToPrimitiveDefaultInitialize(false);
-  setNonTrivialToPrimitiveCopy(false);
-  setNonTrivialToPrimitiveDestroy(false);
-  setParamDestroyedInCallee(false);
-  setArgPassingRestrictions(APK_CanPassInRegs);
-}
-
-RecordDecl *RecordDecl::Create(const ASTContext &C, TagKind TK, DeclContext *DC,
-                               SourceLocation StartLoc, SourceLocation IdLoc,
-                               IdentifierInfo *Id, RecordDecl* PrevDecl) {
-  RecordDecl *R = new (C, DC) RecordDecl(Record, TK, C, DC,
-                                         StartLoc, IdLoc, Id, PrevDecl);
-  R->setMayHaveOutOfDateDef(C.getLangOpts().Modules);
-
-  C.getTypeDeclType(R, PrevDecl);
-  return R;
-}
-
-RecordDecl *RecordDecl::CreateDeserialized(const ASTContext &C, unsigned ID) {
-  RecordDecl *R =
-      new (C, ID) RecordDecl(Record, TTK_Struct, C, nullptr, SourceLocation(),
-                             SourceLocation(), nullptr, nullptr);
-  R->setMayHaveOutOfDateDef(C.getLangOpts().Modules);
-  return R;
-}
-
-bool RecordDecl::isInjectedClassName() const {
-  return isImplicit() && getDeclName() && getDeclContext()->isRecord() &&
-    cast<RecordDecl>(getDeclContext())->getDeclName() == getDeclName();
-}
-
-bool RecordDecl::isLambda() const {
-  if (auto RD = dyn_cast<CXXRecordDecl>(this))
-    return RD->isLambda();
-  return false;
-}
-
-bool RecordDecl::isCapturedRecord() const {
-  return hasAttr<CapturedRecordAttr>();
-}
-
-void RecordDecl::setCapturedRecord() {
-  addAttr(CapturedRecordAttr::CreateImplicit(getASTContext()));
-}
-
-RecordDecl::field_iterator RecordDecl::field_begin() const {
-  if (hasExternalLexicalStorage() && !hasLoadedFieldsFromExternalStorage())
-    LoadFieldsFromExternalStorage();
-
-  return field_iterator(decl_iterator(FirstDecl));
-}
-
-/// completeDefinition - Notes that the definition of this type is now
-/// complete.
-void RecordDecl::completeDefinition() {
-  assert(!isCompleteDefinition() && "Cannot redefine record!");
-  TagDecl::completeDefinition();
-}
-
-/// isMsStruct - Get whether or not this record uses ms_struct layout.
-/// This which can be turned on with an attribute, pragma, or the
-/// -mms-bitfields command-line option.
-bool RecordDecl::isMsStruct(const ASTContext &C) const {
-  return hasAttr<MSStructAttr>() || C.getLangOpts().MSBitfields == 1;
-}
-
-void RecordDecl::LoadFieldsFromExternalStorage() const {
-  ExternalASTSource *Source = getASTContext().getExternalSource();
-  assert(hasExternalLexicalStorage() && Source && "No external storage?");
-
-  // Notify that we have a RecordDecl doing some initialization.
-  ExternalASTSource::Deserializing TheFields(Source);
-
-  SmallVector<Decl*, 64> Decls;
-  setHasLoadedFieldsFromExternalStorage(true);
-  Source->FindExternalLexicalDecls(this, [](Decl::Kind K) {
-    return FieldDecl::classofKind(K) || IndirectFieldDecl::classofKind(K);
-  }, Decls);
-
-#ifndef NDEBUG
-  // Check that all decls we got were FieldDecls.
-  for (unsigned i=0, e=Decls.size(); i != e; ++i)
-    assert(isa<FieldDecl>(Decls[i]) || isa<IndirectFieldDecl>(Decls[i]));
-#endif
-
-  if (Decls.empty())
-    return;
-
-  std::tie(FirstDecl, LastDecl) = BuildDeclChain(Decls,
-                                                 /*FieldsAlreadyLoaded=*/false);
-}
-
-bool RecordDecl::mayInsertExtraPadding(bool EmitRemark) const {
-  ASTContext &Context = getASTContext();
-  const SanitizerMask EnabledAsanMask = Context.getLangOpts().Sanitize.Mask &
-      (SanitizerKind::Address | SanitizerKind::KernelAddress);
-  if (!EnabledAsanMask || !Context.getLangOpts().SanitizeAddressFieldPadding)
-    return false;
-  const auto &Blacklist = Context.getSanitizerBlacklist();
-  const auto *CXXRD = dyn_cast<CXXRecordDecl>(this);
-  // We may be able to relax some of these requirements.
-  int ReasonToReject = -1;
-  if (!CXXRD || CXXRD->isExternCContext())
-    ReasonToReject = 0;  // is not C++.
-  else if (CXXRD->hasAttr<PackedAttr>())
-    ReasonToReject = 1;  // is packed.
-  else if (CXXRD->isUnion())
-    ReasonToReject = 2;  // is a union.
-  else if (CXXRD->isTriviallyCopyable())
-    ReasonToReject = 3;  // is trivially copyable.
-  else if (CXXRD->hasTrivialDestructor())
-    ReasonToReject = 4;  // has trivial destructor.
-  else if (CXXRD->isStandardLayout())
-    ReasonToReject = 5;  // is standard layout.
-  else if (Blacklist.isBlacklistedLocation(EnabledAsanMask, getLocation(),
-                                           "field-padding"))
-    ReasonToReject = 6;  // is in a blacklisted file.
-  else if (Blacklist.isBlacklistedType(EnabledAsanMask,
-                                       getQualifiedNameAsString(),
-                                       "field-padding"))
-    ReasonToReject = 7;  // is blacklisted.
-
-  if (EmitRemark) {
-    if (ReasonToReject >= 0)
-      Context.getDiagnostics().Report(
-          getLocation(),
-          diag::remark_sanitize_address_insert_extra_padding_rejected)
-          << getQualifiedNameAsString() << ReasonToReject;
-    else
-      Context.getDiagnostics().Report(
-          getLocation(),
-          diag::remark_sanitize_address_insert_extra_padding_accepted)
-          << getQualifiedNameAsString();
-  }
-  return ReasonToReject < 0;
-}
-
-const FieldDecl *RecordDecl::findFirstNamedDataMember() const {
-  for (const auto *I : fields()) {
-    if (I->getIdentifier())
-      return I;
-
-    if (const auto *RT = I->getType()->getAs<RecordType>())
-      if (const FieldDecl *NamedDataMember =
-              RT->getDecl()->findFirstNamedDataMember())
-        return NamedDataMember;
-  }
-
-  // We didn't find a named data member.
-  return nullptr;
-}
-
-//===----------------------------------------------------------------------===//
-// BlockDecl Implementation
-//===----------------------------------------------------------------------===//
-
-BlockDecl::BlockDecl(DeclContext *DC, SourceLocation CaretLoc)
-    : Decl(Block, DC, CaretLoc), DeclContext(Block) {
-  setIsVariadic(false);
-  setCapturesCXXThis(false);
-  setBlockMissingReturnType(true);
-  setIsConversionFromLambda(false);
-  setDoesNotEscape(false);
-}
-
-void BlockDecl::setParams(ArrayRef<ParmVarDecl *> NewParamInfo) {
-  assert(!ParamInfo && "Already has param info!");
-
-  // Zero params -> null pointer.
-  if (!NewParamInfo.empty()) {
-    NumParams = NewParamInfo.size();
-    ParamInfo = new (getASTContext()) ParmVarDecl*[NewParamInfo.size()];
-    std::copy(NewParamInfo.begin(), NewParamInfo.end(), ParamInfo);
-  }
-}
-
-void BlockDecl::setCaptures(ASTContext &Context, ArrayRef<Capture> Captures,
-                            bool CapturesCXXThis) {
-  this->setCapturesCXXThis(CapturesCXXThis);
-  this->NumCaptures = Captures.size();
-
-  if (Captures.empty()) {
-    this->Captures = nullptr;
-    return;
-  }
-
-  this->Captures = Captures.copy(Context).data();
-}
-
-bool BlockDecl::capturesVariable(const VarDecl *variable) const {
-  for (const auto &I : captures())
-    // Only auto vars can be captured, so no redeclaration worries.
-    if (I.getVariable() == variable)
-      return true;
-
-  return false;
-}
-
-SourceRange BlockDecl::getSourceRange() const {
-  return SourceRange(getLocation(), Body ? Body->getEndLoc() : getLocation());
-}
-
-//===----------------------------------------------------------------------===//
-// Other Decl Allocation/Deallocation Method Implementations
-//===----------------------------------------------------------------------===//
-
-void TranslationUnitDecl::anchor() {}
-
-TranslationUnitDecl *TranslationUnitDecl::Create(ASTContext &C) {
-  return new (C, (DeclContext *)nullptr) TranslationUnitDecl(C);
-}
-
-void PragmaCommentDecl::anchor() {}
-
-PragmaCommentDecl *PragmaCommentDecl::Create(const ASTContext &C,
-                                             TranslationUnitDecl *DC,
-                                             SourceLocation CommentLoc,
-                                             PragmaMSCommentKind CommentKind,
-                                             StringRef Arg) {
-  PragmaCommentDecl *PCD =
-      new (C, DC, additionalSizeToAlloc<char>(Arg.size() + 1))
-          PragmaCommentDecl(DC, CommentLoc, CommentKind);
-  memcpy(PCD->getTrailingObjects<char>(), Arg.data(), Arg.size());
-  PCD->getTrailingObjects<char>()[Arg.size()] = '\0';
-  return PCD;
-}
-
-PragmaCommentDecl *PragmaCommentDecl::CreateDeserialized(ASTContext &C,
-                                                         unsigned ID,
-                                                         unsigned ArgSize) {
-  return new (C, ID, additionalSizeToAlloc<char>(ArgSize + 1))
-      PragmaCommentDecl(nullptr, SourceLocation(), PCK_Unknown);
-}
-
-void PragmaDetectMismatchDecl::anchor() {}
-
-PragmaDetectMismatchDecl *
-PragmaDetectMismatchDecl::Create(const ASTContext &C, TranslationUnitDecl *DC,
-                                 SourceLocation Loc, StringRef Name,
-                                 StringRef Value) {
-  size_t ValueStart = Name.size() + 1;
-  PragmaDetectMismatchDecl *PDMD =
-      new (C, DC, additionalSizeToAlloc<char>(ValueStart + Value.size() + 1))
-          PragmaDetectMismatchDecl(DC, Loc, ValueStart);
-  memcpy(PDMD->getTrailingObjects<char>(), Name.data(), Name.size());
-  PDMD->getTrailingObjects<char>()[Name.size()] = '\0';
-  memcpy(PDMD->getTrailingObjects<char>() + ValueStart, Value.data(),
-         Value.size());
-  PDMD->getTrailingObjects<char>()[ValueStart + Value.size()] = '\0';
-  return PDMD;
-}
-
-PragmaDetectMismatchDecl *
-PragmaDetectMismatchDecl::CreateDeserialized(ASTContext &C, unsigned ID,
-                                             unsigned NameValueSize) {
-  return new (C, ID, additionalSizeToAlloc<char>(NameValueSize + 1))
-      PragmaDetectMismatchDecl(nullptr, SourceLocation(), 0);
-}
-
-void ExternCContextDecl::anchor() {}
-
-ExternCContextDecl *ExternCContextDecl::Create(const ASTContext &C,
-                                               TranslationUnitDecl *DC) {
-  return new (C, DC) ExternCContextDecl(DC);
-}
-
-void LabelDecl::anchor() {}
-
-LabelDecl *LabelDecl::Create(ASTContext &C, DeclContext *DC,
-                             SourceLocation IdentL, IdentifierInfo *II) {
-  return new (C, DC) LabelDecl(DC, IdentL, II, nullptr, IdentL);
-}
-
-LabelDecl *LabelDecl::Create(ASTContext &C, DeclContext *DC,
-                             SourceLocation IdentL, IdentifierInfo *II,
-                             SourceLocation GnuLabelL) {
-  assert(GnuLabelL != IdentL && "Use this only for GNU local labels");
-  return new (C, DC) LabelDecl(DC, IdentL, II, nullptr, GnuLabelL);
-}
-
-LabelDecl *LabelDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
-  return new (C, ID) LabelDecl(nullptr, SourceLocation(), nullptr, nullptr,
-                               SourceLocation());
-}
-
-void LabelDecl::setMSAsmLabel(StringRef Name) {
-  char *Buffer = new (getASTContext(), 1) char[Name.size() + 1];
-  memcpy(Buffer, Name.data(), Name.size());
-  Buffer[Name.size()] = '\0';
-  MSAsmName = Buffer;
-}
-
-void ValueDecl::anchor() {}
-
-bool ValueDecl::isWeak() const {
-  for (const auto *I : attrs())
-    if (isa<WeakAttr>(I) || isa<WeakRefAttr>(I))
-      return true;
-
-  return isWeakImported();
-}
-
-void ImplicitParamDecl::anchor() {}
-
-ImplicitParamDecl *ImplicitParamDecl::Create(ASTContext &C, DeclContext *DC,
-                                             SourceLocation IdLoc,
-                                             IdentifierInfo *Id, QualType Type,
-                                             ImplicitParamKind ParamKind) {
-  return new (C, DC) ImplicitParamDecl(C, DC, IdLoc, Id, Type, ParamKind);
-}
-
-ImplicitParamDecl *ImplicitParamDecl::Create(ASTContext &C, QualType Type,
-                                             ImplicitParamKind ParamKind) {
-  return new (C, nullptr) ImplicitParamDecl(C, Type, ParamKind);
-}
-
-ImplicitParamDecl *ImplicitParamDecl::CreateDeserialized(ASTContext &C,
-                                                         unsigned ID) {
-  return new (C, ID) ImplicitParamDecl(C, QualType(), ImplicitParamKind::Other);
-}
-
-FunctionDecl *FunctionDecl::Create(ASTContext &C, DeclContext *DC,
-                                   SourceLocation StartLoc,
-                                   const DeclarationNameInfo &NameInfo,
-                                   QualType T, TypeSourceInfo *TInfo,
-                                   StorageClass SC,
-                                   bool isInlineSpecified,
-                                   bool hasWrittenPrototype,
-                                   bool isConstexprSpecified) {
-  FunctionDecl *New =
-      new (C, DC) FunctionDecl(Function, C, DC, StartLoc, NameInfo, T, TInfo,
-                               SC, isInlineSpecified, isConstexprSpecified);
-  New->setHasWrittenPrototype(hasWrittenPrototype);
-  return New;
-}
-
-FunctionDecl *FunctionDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
-  return new (C, ID) FunctionDecl(Function, C, nullptr, SourceLocation(),
-                                  DeclarationNameInfo(), QualType(), nullptr,
-                                  SC_None, false, false);
-}
-
-BlockDecl *BlockDecl::Create(ASTContext &C, DeclContext *DC, SourceLocation L) {
-  return new (C, DC) BlockDecl(DC, L);
-}
-
-BlockDecl *BlockDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
-  return new (C, ID) BlockDecl(nullptr, SourceLocation());
-}
-
-CapturedDecl::CapturedDecl(DeclContext *DC, unsigned NumParams)
-    : Decl(Captured, DC, SourceLocation()), DeclContext(Captured),
-      NumParams(NumParams), ContextParam(0), BodyAndNothrow(nullptr, false) {}
-
-CapturedDecl *CapturedDecl::Create(ASTContext &C, DeclContext *DC,
-                                   unsigned NumParams) {
-  return new (C, DC, additionalSizeToAlloc<ImplicitParamDecl *>(NumParams))
-      CapturedDecl(DC, NumParams);
-}
-
-CapturedDecl *CapturedDecl::CreateDeserialized(ASTContext &C, unsigned ID,
-                                               unsigned NumParams) {
-  return new (C, ID, additionalSizeToAlloc<ImplicitParamDecl *>(NumParams))
-      CapturedDecl(nullptr, NumParams);
-}
-
-Stmt *CapturedDecl::getBody() const { return BodyAndNothrow.getPointer(); }
-void CapturedDecl::setBody(Stmt *B) { BodyAndNothrow.setPointer(B); }
-
-bool CapturedDecl::isNothrow() const { return BodyAndNothrow.getInt(); }
-void CapturedDecl::setNothrow(bool Nothrow) { BodyAndNothrow.setInt(Nothrow); }
-
-EnumConstantDecl *EnumConstantDecl::Create(ASTContext &C, EnumDecl *CD,
-                                           SourceLocation L,
-                                           IdentifierInfo *Id, QualType T,
-                                           Expr *E, const llvm::APSInt &V) {
-  return new (C, CD) EnumConstantDecl(CD, L, Id, T, E, V);
-}
-
-EnumConstantDecl *
-EnumConstantDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
-  return new (C, ID) EnumConstantDecl(nullptr, SourceLocation(), nullptr,
-                                      QualType(), nullptr, llvm::APSInt());
-}
-
-void IndirectFieldDecl::anchor() {}
-
-IndirectFieldDecl::IndirectFieldDecl(ASTContext &C, DeclContext *DC,
-                                     SourceLocation L, DeclarationName N,
-                                     QualType T,
-                                     MutableArrayRef<NamedDecl *> CH)
-    : ValueDecl(IndirectField, DC, L, N, T), Chaining(CH.data()),
-      ChainingSize(CH.size()) {
-  // In C++, indirect field declarations conflict with tag declarations in the
-  // same scope, so add them to IDNS_Tag so that tag redeclaration finds them.
-  if (C.getLangOpts().CPlusPlus)
-    IdentifierNamespace |= IDNS_Tag;
-}
-
-IndirectFieldDecl *
-IndirectFieldDecl::Create(ASTContext &C, DeclContext *DC, SourceLocation L,
-                          IdentifierInfo *Id, QualType T,
-                          llvm::MutableArrayRef<NamedDecl *> CH) {
-  return new (C, DC) IndirectFieldDecl(C, DC, L, Id, T, CH);
-}
-
-IndirectFieldDecl *IndirectFieldDecl::CreateDeserialized(ASTContext &C,
-                                                         unsigned ID) {
-  return new (C, ID) IndirectFieldDecl(C, nullptr, SourceLocation(),
-                                       DeclarationName(), QualType(), None);
-}
-
-SourceRange EnumConstantDecl::getSourceRange() const {
-  SourceLocation End = getLocation();
-  if (Init)
-    End = Init->getEndLoc();
-  return SourceRange(getLocation(), End);
-}
-
-void TypeDecl::anchor() {}
-
-TypedefDecl *TypedefDecl::Create(ASTContext &C, DeclContext *DC,
-                                 SourceLocation StartLoc, SourceLocation IdLoc,
-                                 IdentifierInfo *Id, TypeSourceInfo *TInfo) {
-  return new (C, DC) TypedefDecl(C, DC, StartLoc, IdLoc, Id, TInfo);
-}
-
-void TypedefNameDecl::anchor() {}
-
-TagDecl *TypedefNameDecl::getAnonDeclWithTypedefName(bool AnyRedecl) const {
-  if (auto *TT = getTypeSourceInfo()->getType()->getAs<TagType>()) {
-    auto *OwningTypedef = TT->getDecl()->getTypedefNameForAnonDecl();
-    auto *ThisTypedef = this;
-    if (AnyRedecl && OwningTypedef) {
-      OwningTypedef = OwningTypedef->getCanonicalDecl();
-      ThisTypedef = ThisTypedef->getCanonicalDecl();
-    }
-    if (OwningTypedef == ThisTypedef)
-      return TT->getDecl();
-  }
-
-  return nullptr;
-}
-
-bool TypedefNameDecl::isTransparentTagSlow() const {
-  auto determineIsTransparent = [&]() {
-    if (auto *TT = getUnderlyingType()->getAs<TagType>()) {
-      if (auto *TD = TT->getDecl()) {
-        if (TD->getName() != getName())
-          return false;
-        SourceLocation TTLoc = getLocation();
-        SourceLocation TDLoc = TD->getLocation();
-        if (!TTLoc.isMacroID() || !TDLoc.isMacroID())
-          return false;
-        SourceManager &SM = getASTContext().getSourceManager();
-        return SM.getSpellingLoc(TTLoc) == SM.getSpellingLoc(TDLoc);
-      }
-    }
-    return false;
-  };
-
-  bool isTransparent = determineIsTransparent();
-  MaybeModedTInfo.setInt((isTransparent << 1) | 1);
-  return isTransparent;
-}
-
-TypedefDecl *TypedefDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
-  return new (C, ID) TypedefDecl(C, nullptr, SourceLocation(), SourceLocation(),
-                                 nullptr, nullptr);
-}
-
-TypeAliasDecl *TypeAliasDecl::Create(ASTContext &C, DeclContext *DC,
-                                     SourceLocation StartLoc,
-                                     SourceLocation IdLoc, IdentifierInfo *Id,
-                                     TypeSourceInfo *TInfo) {
-  return new (C, DC) TypeAliasDecl(C, DC, StartLoc, IdLoc, Id, TInfo);
-}
-
-TypeAliasDecl *TypeAliasDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
-  return new (C, ID) TypeAliasDecl(C, nullptr, SourceLocation(),
-                                   SourceLocation(), nullptr, nullptr);
-}
-
-SourceRange TypedefDecl::getSourceRange() const {
-  SourceLocation RangeEnd = getLocation();
-  if (TypeSourceInfo *TInfo = getTypeSourceInfo()) {
-    if (typeIsPostfix(TInfo->getType()))
-      RangeEnd = TInfo->getTypeLoc().getSourceRange().getEnd();
-  }
-  return SourceRange(getBeginLoc(), RangeEnd);
-}
-
-SourceRange TypeAliasDecl::getSourceRange() const {
-  SourceLocation RangeEnd = getBeginLoc();
-  if (TypeSourceInfo *TInfo = getTypeSourceInfo())
-    RangeEnd = TInfo->getTypeLoc().getSourceRange().getEnd();
-  return SourceRange(getBeginLoc(), RangeEnd);
-}
-
-void FileScopeAsmDecl::anchor() {}
-
-FileScopeAsmDecl *FileScopeAsmDecl::Create(ASTContext &C, DeclContext *DC,
-                                           StringLiteral *Str,
-                                           SourceLocation AsmLoc,
-                                           SourceLocation RParenLoc) {
-  return new (C, DC) FileScopeAsmDecl(DC, Str, AsmLoc, RParenLoc);
-}
-
-FileScopeAsmDecl *FileScopeAsmDecl::CreateDeserialized(ASTContext &C,
-                                                       unsigned ID) {
-  return new (C, ID) FileScopeAsmDecl(nullptr, nullptr, SourceLocation(),
-                                      SourceLocation());
-}
-
-void EmptyDecl::anchor() {}
-
-EmptyDecl *EmptyDecl::Create(ASTContext &C, DeclContext *DC, SourceLocation L) {
-  return new (C, DC) EmptyDecl(DC, L);
-}
-
-EmptyDecl *EmptyDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
-  return new (C, ID) EmptyDecl(nullptr, SourceLocation());
-}
-
-//===----------------------------------------------------------------------===//
-// ImportDecl Implementation
-//===----------------------------------------------------------------------===//
-
-/// Retrieve the number of module identifiers needed to name the given
-/// module.
-static unsigned getNumModuleIdentifiers(Module *Mod) {
-  unsigned Result = 1;
-  while (Mod->Parent) {
-    Mod = Mod->Parent;
-    ++Result;
-  }
-  return Result;
-}
-
-ImportDecl::ImportDecl(DeclContext *DC, SourceLocation StartLoc,
-                       Module *Imported,
-                       ArrayRef<SourceLocation> IdentifierLocs)
-  : Decl(Import, DC, StartLoc), ImportedAndComplete(Imported, true) {
-  assert(getNumModuleIdentifiers(Imported) == IdentifierLocs.size());
-  auto *StoredLocs = getTrailingObjects<SourceLocation>();
-  std::uninitialized_copy(IdentifierLocs.begin(), IdentifierLocs.end(),
-                          StoredLocs);
-}
-
-ImportDecl::ImportDecl(DeclContext *DC, SourceLocation StartLoc,
-                       Module *Imported, SourceLocation EndLoc)
-  : Decl(Import, DC, StartLoc), ImportedAndComplete(Imported, false) {
-  *getTrailingObjects<SourceLocation>() = EndLoc;
-}
-
-ImportDecl *ImportDecl::Create(ASTContext &C, DeclContext *DC,
-                               SourceLocation StartLoc, Module *Imported,
-                               ArrayRef<SourceLocation> IdentifierLocs) {
-  return new (C, DC,
-              additionalSizeToAlloc<SourceLocation>(IdentifierLocs.size()))
-      ImportDecl(DC, StartLoc, Imported, IdentifierLocs);
-}
-
-ImportDecl *ImportDecl::CreateImplicit(ASTContext &C, DeclContext *DC,
-                                       SourceLocation StartLoc,
-                                       Module *Imported,
-                                       SourceLocation EndLoc) {
-  ImportDecl *Import = new (C, DC, additionalSizeToAlloc<SourceLocation>(1))
-      ImportDecl(DC, StartLoc, Imported, EndLoc);
-  Import->setImplicit();
-  return Import;
-}
-
-ImportDecl *ImportDecl::CreateDeserialized(ASTContext &C, unsigned ID,
-                                           unsigned NumLocations) {
-  return new (C, ID, additionalSizeToAlloc<SourceLocation>(NumLocations))
-      ImportDecl(EmptyShell());
-}
-
-ArrayRef<SourceLocation> ImportDecl::getIdentifierLocs() const {
-  if (!ImportedAndComplete.getInt())
-    return None;
-
-  const auto *StoredLocs = getTrailingObjects<SourceLocation>();
-  return llvm::makeArrayRef(StoredLocs,
-                            getNumModuleIdentifiers(getImportedModule()));
-}
-
-SourceRange ImportDecl::getSourceRange() const {
-  if (!ImportedAndComplete.getInt())
-    return SourceRange(getLocation(), *getTrailingObjects<SourceLocation>());
-
-  return SourceRange(getLocation(), getIdentifierLocs().back());
-}
-
-//===----------------------------------------------------------------------===//
-// ExportDecl Implementation
-//===----------------------------------------------------------------------===//
-
-void ExportDecl::anchor() {}
-
-ExportDecl *ExportDecl::Create(ASTContext &C, DeclContext *DC,
-                               SourceLocation ExportLoc) {
-  return new (C, DC) ExportDecl(DC, ExportLoc);
-}
-
-ExportDecl *ExportDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
-  return new (C, ID) ExportDecl(nullptr, SourceLocation());
-}