/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp

Bug Summary

File:	tools/clang/lib/AST/Decl.cpp
Warning:	line 4486, column 3 Null pointer passed as an argument to a 'nonnull' parameter
Annotated Source Code

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clang -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name Decl.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -mthread-model posix -relaxed-aliasing -fmath-errno -masm-verbose -mconstructor-aliases -munwind-tables -fuse-init-array -target-cpu x86-64 -dwarf-column-info -debugger-tuning=gdb -momit-leaf-frame-pointer -ffunction-sections -fdata-sections -resource-dir /usr/lib/llvm-9/lib/clang/9.0.0 -D CLANG_VENDOR="Debian " -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-9~svn362543/build-llvm/tools/clang/lib/AST -I /build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST -I /build/llvm-toolchain-snapshot-9~svn362543/tools/clang/include -I /build/llvm-toolchain-snapshot-9~svn362543/build-llvm/tools/clang/include -I /build/llvm-toolchain-snapshot-9~svn362543/build-llvm/include -I /build/llvm-toolchain-snapshot-9~svn362543/include -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/x86_64-linux-gnu/c++/6.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/6.3.0/../../../../include/c++/6.3.0/backward -internal-isystem /usr/include/clang/9.0.0/include/ -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-9/lib/clang/9.0.0/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O2 -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-comment -std=c++11 -fdeprecated-macro -fdebug-compilation-dir /build/llvm-toolchain-snapshot-9~svn362543/build-llvm/tools/clang/lib/AST -fdebug-prefix-map=/build/llvm-toolchain-snapshot-9~svn362543=. -ferror-limit 19 -fmessage-length 0 -fvisibility-inlines-hidden -stack-protector 2 -fobjc-runtime=gcc -fno-common -fdiagnostics-show-option -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -o /tmp/scan-build-2019-06-05-060531-1271-1 -x c++ /build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp -faddrsig
1//===- Decl.cpp - Declaration AST Node Implementation ---------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file implements the Decl subclasses.
10//
11//===----------------------------------------------------------------------===//

13#include "clang/AST/Decl.h"
14#include "Linkage.h"
15#include "clang/AST/ASTContext.h"
16#include "clang/AST/ASTDiagnostic.h"
17#include "clang/AST/ASTLambda.h"
18#include "clang/AST/ASTMutationListener.h"
19#include "clang/AST/CanonicalType.h"
20#include "clang/AST/DeclBase.h"
21#include "clang/AST/DeclCXX.h"
22#include "clang/AST/DeclObjC.h"
23#include "clang/AST/DeclOpenMP.h"
24#include "clang/AST/DeclTemplate.h"
25#include "clang/AST/DeclarationName.h"
26#include "clang/AST/Expr.h"
27#include "clang/AST/ExprCXX.h"
28#include "clang/AST/ExternalASTSource.h"
29#include "clang/AST/ODRHash.h"
30#include "clang/AST/PrettyDeclStackTrace.h"
31#include "clang/AST/PrettyPrinter.h"
32#include "clang/AST/Redeclarable.h"
33#include "clang/AST/Stmt.h"
34#include "clang/AST/TemplateBase.h"
35#include "clang/AST/Type.h"
36#include "clang/AST/TypeLoc.h"
37#include "clang/Basic/Builtins.h"
38#include "clang/Basic/IdentifierTable.h"
39#include "clang/Basic/LLVM.h"
40#include "clang/Basic/LangOptions.h"
41#include "clang/Basic/Linkage.h"
42#include "clang/Basic/Module.h"
43#include "clang/Basic/PartialDiagnostic.h"
44#include "clang/Basic/SanitizerBlacklist.h"
45#include "clang/Basic/Sanitizers.h"
46#include "clang/Basic/SourceLocation.h"
47#include "clang/Basic/SourceManager.h"
48#include "clang/Basic/Specifiers.h"
49#include "clang/Basic/TargetCXXABI.h"
50#include "clang/Basic/TargetInfo.h"
51#include "clang/Basic/Visibility.h"
52#include "llvm/ADT/APSInt.h"
53#include "llvm/ADT/ArrayRef.h"
54#include "llvm/ADT/None.h"
55#include "llvm/ADT/Optional.h"
56#include "llvm/ADT/STLExtras.h"
57#include "llvm/ADT/SmallVector.h"
58#include "llvm/ADT/StringSwitch.h"
59#include "llvm/ADT/StringRef.h"
60#include "llvm/ADT/Triple.h"
61#include "llvm/Support/Casting.h"
62#include "llvm/Support/ErrorHandling.h"
63#include "llvm/Support/raw_ostream.h"
64#include <algorithm>
65#include <cassert>
66#include <cstddef>
67#include <cstring>
68#include <memory>
69#include <string>
70#include <tuple>
71#include <type_traits>

73using namespace clang;

75Decl *clang::getPrimaryMergedDecl(Decl *D) {
return D->getASTContext().getPrimaryMergedDecl(D);
77}

79void 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';
95}

97// Defined here so that it can be inlined into its direct callers.
98bool Decl::isOutOfLine() const {
return !getLexicalDeclContext()->Equals(getDeclContext());
100}

102TranslationUnitDecl::TranslationUnitDecl(ASTContext &ctx)
  : Decl(TranslationUnit, nullptr, SourceLocation()),
    DeclContext(TranslationUnit), Ctx(ctx) {}

106//===----------------------------------------------------------------------===//
107// NamedDecl Implementation
108//===----------------------------------------------------------------------===//

110// Visibility rules aren't rigorously externally specified, but here
111// are the basic principles behind what we implement:
112//
113// 1. An explicit visibility attribute is generally a direct expression
114// of the user's intent and should be honored.  Only the innermost
115// visibility attribute applies.  If no visibility attribute applies,
116// global visibility settings are considered.
117//
118// 2. There is one caveat to the above: on or in a template pattern,
119// an explicit visibility attribute is just a default rule, and
120// visibility can be decreased by the visibility of template
121// arguments.  But this, too, has an exception: an attribute on an
122// explicit specialization or instantiation causes all the visibility
123// restrictions of the template arguments to be ignored.
124//
125// 3. A variable that does not otherwise have explicit visibility can
126// be restricted by the visibility of its type.
127//
128// 4. A visibility restriction is explicit if it comes from an
129// attribute (or something like it), not a global visibility setting.
130// When emitting a reference to an external symbol, visibility
131// restrictions are ignored unless they are explicit.
132//
133// 5. When computing the visibility of a non-type, including a
134// non-type member of a class, only non-type visibility restrictions
135// are considered: the 'visibility' attribute, global value-visibility
136// settings, and a few special cases like __private_extern.
137//
138// 6. When computing the visibility of a type, including a type member
139// of a class, only type visibility restrictions are considered:
140// the 'type_visibility' attribute and global type-visibility settings.
141// However, a 'visibility' attribute counts as a 'type_visibility'
142// attribute on any declaration that only has the former.
143//
144// The visibility of a "secondary" entity, like a template argument,
145// is computed using the kind of that entity, not the kind of the
146// primary entity for which we are computing visibility.  For example,
147// the visibility of a specialization of either of these templates:
148//   template <class T, bool (&compare)(T, X)> bool has_match(list<T>, X);
149//   template <class T, bool (&compare)(T, X)> class matcher;
150// is restricted according to the type visibility of the argument 'T',
151// the type visibility of 'bool(&)(T,X)', and the value visibility of
152// the argument function 'compare'.  That 'has_match' is a value
153// and 'matcher' is a type only matters when looking for attributes
154// and settings from the immediate context.

156/// Does this computation kind permit us to consider additional
157/// visibility settings from attributes and the like?
158static bool hasExplicitVisibilityAlready(LVComputationKind computation) {
return computation.IgnoreExplicitVisibility;
160}

162/// Given an LVComputationKind, return one of the same type/value sort
163/// that records that it already has explicit visibility.
164static LVComputationKind
165withExplicitVisibilityAlready(LVComputationKind Kind) {
Kind.IgnoreExplicitVisibility = true;
return Kind;
168}

170static Optional<Visibility> getExplicitVisibility(const NamedDecl *D,
                                                LVComputationKind kind) {
assert(!kind.IgnoreExplicitVisibility &&((!kind.IgnoreExplicitVisibility && "asking for explicit visibility when we shouldn't be"
) ? static_cast<void> (0) : __assert_fail ("!kind.IgnoreExplicitVisibility && \"asking for explicit visibility when we shouldn't be\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 173, __PRETTY_FUNCTION__))
       "asking for explicit visibility when we shouldn't be")((!kind.IgnoreExplicitVisibility && "asking for explicit visibility when we shouldn't be"
) ? static_cast<void> (0) : __assert_fail ("!kind.IgnoreExplicitVisibility && \"asking for explicit visibility when we shouldn't be\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 173, __PRETTY_FUNCTION__));
return D->getExplicitVisibility(kind.getExplicitVisibilityKind());
175}

177/// Is the given declaration a "type" or a "value" for the purposes of
178/// visibility computation?
179static bool usesTypeVisibility(const NamedDecl *D) {
return isa<TypeDecl>(D) ||
       isa<ClassTemplateDecl>(D) ||
       isa<ObjCInterfaceDecl>(D);
183}

185/// Does the given declaration have member specialization information,
186/// and if so, is it an explicit specialization?
187template <class T> static typename
188std::enable_if<!std::is_base_of<RedeclarableTemplateDecl, T>::value, bool>::type
189isExplicitMemberSpecialization(const T *D) {
if (const MemberSpecializationInfo *member =
      D->getMemberSpecializationInfo()) {
  return member->isExplicitSpecialization();
}
return false;
195}

197/// For templates, this question is easier: a member template can't be
198/// explicitly instantiated, so there's a single bit indicating whether
199/// or not this is an explicit member specialization.
200static bool isExplicitMemberSpecialization(const RedeclarableTemplateDecl *D) {
return D->isMemberSpecialization();
202}

204/// Given a visibility attribute, return the explicit visibility
205/// associated with it.
206template <class T>
207static 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")::llvm::llvm_unreachable_internal("bad visibility kind", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 216);
217}

219/// Return the explicit visibility of the given declaration.
220static 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;
236}

238LinkageInfo LinkageComputer::getLVForType(const Type &T,
                                        LVComputationKind computation) {
if (computation.IgnoreAllVisibility)
  return LinkageInfo(T.getLinkage(), DefaultVisibility, true);
return getTypeLinkageAndVisibility(&T);
243}

245/// Get the most restrictive linkage for the types in the given
246/// template parameter list.  For visibility purposes, template
247/// parameters are part of the signature of a template.
248LinkageInfo 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;
299}

301static 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;
310}

312/// Get the most restrictive linkage for the types and
313/// declarations in the given template argument list.
314///
315/// Note that we don't take an LVComputationKind because we always
316/// want to honor the visibility of template arguments in the same way.
317LinkageInfo
318LinkageComputer::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))((!usesTypeVisibility(ND)) ? static_cast<void> (0) : __assert_fail
 ("!usesTypeVisibility(ND)", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 335, __PRETTY_FUNCTION__));
    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")::llvm::llvm_unreachable_internal("bad template argument kind"
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 355);
}

return LV;
359}

361LinkageInfo
362LinkageComputer::getLVForTemplateArgumentList(const TemplateArgumentList &TArgs,
                                            LVComputationKind computation) {
return getLVForTemplateArgumentList(TArgs.asArray(), computation);
365}

367static 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>();
377}

379/// Merge in template-related linkage and visibility for the given
380/// function template specialization.
381///
382/// We don't need a computation kind here because we can assume
383/// LVForValue.
384///
385/// \param[out] LV the computation to use for the parent
386void 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);
403}

405/// Does the given declaration have a direct visibility attribute
406/// that would match the given rules?
407static bool hasDirectVisibilityAttribute(const NamedDecl *D,
                                       LVComputationKind computation) {
if (computation.IgnoreAllVisibility)
  return false;

return (computation.isTypeVisibility() && D->hasAttr<TypeVisibilityAttr>()) ||
       D->hasAttr<VisibilityAttr>();
414}

416/// Should we consider visibility associated with the template
417/// arguments and parameters of the given class template specialization?
418static 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);
450}

452/// Merge in template-related linkage and visibility for the given
453/// class template specialization.
454void 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);
476}

478/// Should we consider visibility associated with the template
479/// arguments and parameters of the given variable template
480/// specialization? As usual, follow class template specialization
481/// logic up to initialization.
482static 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);
501}

503/// Merge in template-related linkage and visibility for the given
504/// variable template specialization. As usual, follow class template
505/// specialization logic up to initialization.
506void 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);
528}

530static 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>();
556}

558template <typename T> static bool isFirstInExternCContext(T *D) {
const T *First = D->getFirstDecl();
return First->isInExternCContext();
561}

563static bool isSingleLineLanguageLinkage(const Decl &D) {
if (const auto *SD = dyn_cast<LinkageSpecDecl>(D.getDeclContext()))
  if (!SD->hasBraces())
    return true;
return false;
568}

570/// Determine whether D is declared in the purview of a named module.
571static bool isInModulePurview(const NamedDecl *D) {
if (auto *M = D->getOwningModule())
  return M->isModulePurview();
return false;
575}

577static bool isExportedFromModuleInterfaceUnit(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:
  return isInModulePurview(D);
}
llvm_unreachable("unexpected module ownership kind")::llvm::llvm_unreachable_internal("unexpected module ownership kind"
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 587);
588}

590static 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 (isInModulePurview(D))
  return LinkageInfo(ModuleInternalLinkage, DefaultVisibility, false);

return LinkageInfo::internal();
599}

601static 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 (isInModulePurview(D) && !isExportedFromModuleInterfaceUnit(
                                cast<NamedDecl>(D->getCanonicalDecl())))
  return LinkageInfo(ModuleLinkage, DefaultVisibility, false);

return LinkageInfo::external();
611}

613static StorageClass getStorageClass(const Decl *D) {
if (auto *TD = dyn_cast<TemplateDecl>(D))
  D = TD->getTemplatedDecl();
if (D) {
  if (auto *VD = dyn_cast<VarDecl>(D))
    return VD->getStorageClass();
  if (auto *FD = dyn_cast<FunctionDecl>(D))
    return FD->getStorageClass();
}
return SC_None;
623}

625LinkageInfo
626LinkageComputer::getLVForNamespaceScopeDecl(const NamedDecl *D,
                                          LVComputationKind computation,
                                          bool IgnoreVarTypeLinkage) {
assert(D->getDeclContext()->getRedeclContext()->isFileContext() &&((D->getDeclContext()->getRedeclContext()->isFileContext
() && "Not a name having namespace scope") ? static_cast
<void> (0) : __assert_fail ("D->getDeclContext()->getRedeclContext()->isFileContext() && \"Not a name having namespace scope\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 630, __PRETTY_FUNCTION__))
       "Not a name having namespace scope")((D->getDeclContext()->getRedeclContext()->isFileContext
() && "Not a name having namespace scope") ? static_cast
<void> (0) : __assert_fail ("D->getDeclContext()->getRedeclContext()->isFileContext() && \"Not a name having namespace scope\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 630, __PRETTY_FUNCTION__));
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

if (getStorageClass(D->getCanonicalDecl()) == SC_Static) {
  // - a variable, variable template, function, or function template
  //   that is explicitly declared static; or
  // (This bullet corresponds to C99 6.2.2p3.)
  return getInternalLinkageFor(D);
}

if (const auto *Var = dyn_cast<VarDecl>(D)) {
  // - a non-template variable of non-volatile const-qualified type, unless
  //   - it is explicitly declared extern, or
  //   - it is inline or exported, or
  //   - it was previously declared and the prior declaration did not have
  //     internal linkage
  // (There is no equivalent in C99.)
  if (Context.getLangOpts().CPlusPlus &&
      Var->getType().isConstQualified() &&
      !Var->getType().isVolatileQualified() &&
      !Var->isInline() &&
      !isExportedFromModuleInterfaceUnit(Var) &&
      !isa<VarTemplateSpecializationDecl>(Var) &&
      !Var->getDescribedVarTemplate()) {
    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 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!")((VD && "Expected a VarDecl in this IndirectFieldDecl!"
) ? static_cast<void> (0) : __assert_fail ("VD && \"Expected a VarDecl in this IndirectFieldDecl!\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 680, __PRETTY_FUNCTION__));
  return getLVForNamespaceScopeDecl(VD, computation, IgnoreVarTypeLinkage);
}
assert(!isa<FieldDecl>(D) && "Didn't expect a FieldDecl!")((!isa<FieldDecl>(D) && "Didn't expect a FieldDecl!"
) ? static_cast<void> (0) : __assert_fail ("!isa<FieldDecl>(D) && \"Didn't expect a FieldDecl!\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 683, __PRETTY_FUNCTION__));

// FIXME: This gives internal linkage to names that should have no linkage
// (those not covered by [basic.link]p6).
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 that has not been given internal linkage
//   above and that is the name of
//   [...bullets...]
//   has its linkage determined as follows:
//     - if the enclosing namespace has internal linkage, the name has
//       internal linkage; [handled above]
//     - otherwise, if the declaration of the name is attached to a named
//       module and is not exported, the name has module linkage;
//     - otherwise, the name has external linkage.
// LV is currently set up to handle the last two bullets.
//
//   The bullets are:

//     - a variable; 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; 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);
  }

// FIXME: This is not part of the C++ standard any more.
//     - an enumerator belonging to an enumeration with external linkage; or
} 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
} else if (const auto *temp = dyn_cast<TemplateDecl>(D)) {
  bool considerVisibility = !hasExplicitVisibilityAlready(computation);
  LinkageInfo tempLV =
    getLVForTemplateParameterList(temp->getTemplateParameters(), computation);
  LV.mergeMaybeWithVisibility(tempLV, considerVisibility);

//     An unnamed namespace or a namespace declared directly or indirectly
//     within an unnamed namespace has internal linkage. All other namespaces
//     have external linkage.
//
// 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;
905}

907LinkageInfo
908LinkageComputer::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))((!explicitSpecSuppressor || !isa<TemplateDecl>(explicitSpecSuppressor
)) ? static_cast<void> (0) : __assert_fail ("!explicitSpecSuppressor || !isa<TemplateDecl>(explicitSpecSuppressor)"
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 1042, __PRETTY_FUNCTION__));

// 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;
1058}

1060void NamedDecl::anchor() {}

1062bool NamedDecl::isLinkageValid() const {
if (!hasCachedLinkage())
  return true;

Linkage L = LinkageComputer{}
                .computeLVForDecl(this, LVComputationKind::forLinkageOnly())
                .getLinkage();
return L == getCachedLinkage();
1070}

1072ObjCStringFormatFamily 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;
1083}

1085Linkage 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();
1091}

1093LinkageInfo NamedDecl::getLinkageAndVisibility() const {
return LinkageComputer{}.getDeclLinkageAndVisibility(this);
1095}

1097static Optional<Visibility>
1098getExplicitVisibilityAux(const NamedDecl *ND,
                       NamedDecl::ExplicitVisibilityKind kind,
                       bool IsMostRecent) {
assert(!IsMostRecent || ND == ND->getMostRecentDecl())((!IsMostRecent || ND == ND->getMostRecentDecl()) ? static_cast
<void> (0) : __assert_fail ("!IsMostRecent || ND == ND->getMostRecentDecl()"
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 1101, __PRETTY_FUNCTION__));

// 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;
1174}

1176Optional<Visibility>
1177NamedDecl::getExplicitVisibility(ExplicitVisibilityKind kind) const {
return getExplicitVisibilityAux(this, kind, false);
1179}

1181LinkageInfo 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());
1213}

1215LinkageInfo 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())((cast<VarDecl>(D)->isStaticLocal()) ? static_cast<
void> (0) : __assert_fail ("cast<VarDecl>(D)->isStaticLocal()"
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 1294, __PRETTY_FUNCTION__));
    // 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());
1314}

1316static inline const CXXRecordDecl*
1317getOutermostEnclosingLambda(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;
1327}

1329LinkageInfo 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();
1448}

1450/// getLVForDecl - Get the linkage and visibility for the given declaration.
1451LinkageInfo 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->getCachedLinkage() == LV.getLinkage()) ? static_cast<
void> (0) : __assert_fail ("D->getCachedLinkage() == LV.getLinkage()"
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 1465, __PRETTY_FUNCTION__));

D->setCachedLinkage(LV.getLinkage());
cache(D, computation, LV);

1470#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())((!Old || Old->getCachedLinkage() == D->getCachedLinkage
()) ? static_cast<void> (0) : __assert_fail ("!Old || Old->getCachedLinkage() == D->getCachedLinkage()"
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 1491, __PRETTY_FUNCTION__));
1492#endif

return LV;
1495}

1497LinkageInfo LinkageComputer::getDeclLinkageAndVisibility(const NamedDecl *D) {
return getLVForDecl(D,
                    LVComputationKind(usesTypeVisibility(D)
                                          ? NamedDecl::VisibilityForType
                                          : NamedDecl::VisibilityForValue));
1502}

1504Module *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;
}

case Module::PrivateModuleFragment:
  // The private module fragment is part of its containing module for linkage
  // purposes.
  return M->Parent;
}

llvm_unreachable("unknown module kind")::llvm::llvm_unreachable_internal("unknown module kind", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 1541);
1542}

1544void NamedDecl::printName(raw_ostream &os) const {
os << Name;
1546}

1548std::string NamedDecl::getQualifiedNameAsString() const {
std::string QualName;
llvm::raw_string_ostream OS(QualName);
printQualifiedName(OS, getASTContext().getPrintingPolicy());
return OS.str();
1553}

1555void NamedDecl::printQualifiedName(raw_ostream &OS) const {
printQualifiedName(OS, getASTContext().getPrintingPolicy());
1557}

1559void NamedDecl::printQualifiedName(raw_ostream &OS,
                                 const PrintingPolicy &P) const {
const DeclContext *Ctx = getDeclContext();

// For ObjC methods and properties, look through categories and use the
// interface as context.
if (auto *MD = dyn_cast<ObjCMethodDecl>(this))
  if (auto *ID = MD->getClassInterface())
    Ctx = ID;
if (auto *PD = dyn_cast<ObjCPropertyDecl>(this)) {
  if (auto *MD = PD->getGetterMethodDecl())
    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)";
1652}

1654void NamedDecl::getNameForDiagnostic(raw_ostream &OS,
                                   const PrintingPolicy &Policy,
                                   bool Qualified) const {
if (Qualified)
  printQualifiedName(OS, Policy);
else
  printName(OS);
1661}

1663template<typename T> static bool isRedeclarableImpl(Redeclarable<T> *) {
return true;
1665}
1666static bool isRedeclarableImpl(...) { return false; }
1667static bool isRedeclarable(Decl::Kind K) {
switch (K) {
1669#define DECL(Type, Base) \
case Decl::Type: \
  return isRedeclarableImpl((Type##Decl *)nullptr);
1672#define ABSTRACT_DECL(DECL)
1673#include "clang/AST/DeclNodes.inc"
}
llvm_unreachable("unknown decl kind")::llvm::llvm_unreachable_internal("unknown decl kind", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 1675);
1676}

1678bool NamedDecl::declarationReplaces(NamedDecl *OldD, bool IsKnownNewer) const {
assert(getDeclName() == OldD->getDeclName() && "Declaration name mismatch")((getDeclName() == OldD->getDeclName() && "Declaration name mismatch"
) ? static_cast<void> (0) : __assert_fail ("getDeclName() == OldD->getDeclName() && \"Declaration name mismatch\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 1679, __PRETTY_FUNCTION__));

// 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;
1752}

1754bool NamedDecl::hasLinkage() const {
return getFormalLinkage() != NoLinkage;
1756}

1758NamedDecl *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;
1770}

1772bool 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;
1785}

1787//===----------------------------------------------------------------------===//
1788// DeclaratorDecl Implementation
1789//===----------------------------------------------------------------------===//

1791template <typename DeclT>
1792static SourceLocation getTemplateOrInnerLocStart(const DeclT *decl) {
if (decl->getNumTemplateParameterLists() > 0)
  return decl->getTemplateParameterList(0)->getTemplateLoc();
else
  return decl->getInnerLocStart();
1797}

1799SourceLocation DeclaratorDecl::getTypeSpecStartLoc() const {
TypeSourceInfo *TSI = getTypeSourceInfo();
if (TSI) return TSI->getTypeLoc().getBeginLoc();
return SourceLocation();
1803}

1805void 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;
  }
}
1833}

1835void DeclaratorDecl::setTemplateParameterListsInfo(
  ASTContext &Context, ArrayRef<TemplateParameterList *> TPLists) {
assert(!TPLists.empty())((!TPLists.empty()) ? static_cast<void> (0) : __assert_fail
 ("!TPLists.empty()", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 1837, __PRETTY_FUNCTION__));
// 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);
1849}

1851SourceLocation DeclaratorDecl::getOuterLocStart() const {
return getTemplateOrInnerLocStart(this);
1853}

1855// Helper function: returns true if QT is or contains a type
1856// having a postfix component.
1857static 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;
  }
}
1889}

1891SourceRange 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);
1900}

1902void 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);
}
1916}

1918//===----------------------------------------------------------------------===//
1919// VarDecl Implementation
1920//===----------------------------------------------------------------------===//

1922const 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")::llvm::llvm_unreachable_internal("Invalid storage class", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 1932);
1933}

1935VarDecl::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.
1950}

1952VarDecl *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);
1957}

1959VarDecl *VarDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID)
    VarDecl(Var, C, nullptr, SourceLocation(), SourceLocation(), nullptr,
            QualType(), nullptr, SC_None);
1963}

1965void VarDecl::setStorageClass(StorageClass SC) {
assert(isLegalForVariable(SC))((isLegalForVariable(SC)) ? static_cast<void> (0) : __assert_fail
 ("isLegalForVariable(SC)", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 1966, __PRETTY_FUNCTION__));
VarDeclBits.SClass = SC;
1968}

1970VarDecl::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!")::llvm::llvm_unreachable_internal("Unknown thread storage class specifier!"
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 1989);
1990}

1992SourceRange 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();
2001}

2003template<typename T>
2004static 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;
2029}

2031template<typename T>
2032static 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)((D.getASTContext().getLangOpts().CPlusPlus) ? static_cast<
void> (0) : __assert_fail ("D.getASTContext().getLangOpts().CPlusPlus"
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 2037, __PRETTY_FUNCTION__));
  return false;
}

return D.getLanguageLinkage() == CLanguageLinkage;
2042}

2044LanguageLinkage VarDecl::getLanguageLinkage() const {
return getDeclLanguageLinkage(*this);
2046}

2048bool VarDecl::isExternC() const {
return isDeclExternC(*this);
2050}

2052bool VarDecl::isInExternCContext() const {
return getLexicalDeclContext()->isExternCContext();
2054}

2056bool VarDecl::isInExternCXXContext() const {
return getLexicalDeclContext()->isExternCXXContext();
2058}

2060VarDecl *VarDecl::getCanonicalDecl() { return getFirstDecl(); }

2062VarDecl::DefinitionKind
2063VarDecl::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;
2147}

2149VarDecl *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;
2164}

2166VarDecl *VarDecl::getDefinition(ASTContext &C) {
VarDecl *First = getFirstDecl();
for (auto I : First->redecls()) {
  if (I->isThisDeclarationADefinition(C) == Definition)
    return I;
}
return nullptr;
2173}

2175VarDecl::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;
2186}

2188const Expr *VarDecl::getAnyInitializer(const VarDecl *&D) const {
for (auto I : redecls()) {
  if (auto Expr = I->getInit()) {
    D = I;
    return Expr;
  }
}
return nullptr;
2196}

2198bool VarDecl::hasInit() const {
if (auto *P = dyn_cast<ParmVarDecl>(this))
  if (P->hasUnparsedDefaultArg() || P->hasUninstantiatedDefaultArg())
    return false;

return !Init.isNull();
2204}

2206Expr *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);
2214}

2216Stmt **VarDecl::getInitAddress() {
if (auto *ES = Init.dyn_cast<EvaluatedStmt *>())
  return &ES->Value;

return Init.getAddrOfPtr1();
2221}

2223bool 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;
2237}

2239void VarDecl::setInit(Expr *I) {
if (auto *Eval = Init.dyn_cast<EvaluatedStmt *>()) {
  Eval->~EvaluatedStmt();
  getASTContext().Deallocate(Eval);
}

Init = I;
2246}

2248bool 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();
2273}

2275/// Convert the initializer for this declaration to the elaborated EvaluatedStmt
2276/// form, which contains extra information on the evaluated value of the
2277/// initializer.
2278EvaluatedStmt *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;
2290}

2292APValue *VarDecl::evaluateValue() const {
SmallVector<PartialDiagnosticAt, 8> Notes;
return evaluateValue(Notes);
2295}

2297APValue *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.isAbsent() ? nullptr : &Eval->Evaluated;

const auto *Init = cast<Expr>(Eval->Value);
assert(!Init->isValueDependent())((!Init->isValueDependent()) ? static_cast<void> (0)
 : __assert_fail ("!Init->isValueDependent()", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 2308, __PRETTY_FUNCTION__));

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;
2341}

2343APValue *VarDecl::getEvaluatedValue() const {
if (EvaluatedStmt *Eval = Init.dyn_cast<EvaluatedStmt *>())
  if (Eval->WasEvaluated)
    return &Eval->Evaluated;

return nullptr;
2349}

2351bool VarDecl::isInitKnownICE() const {
if (EvaluatedStmt *Eval = Init.dyn_cast<EvaluatedStmt *>())
  return Eval->CheckedICE;

return false;
2356}

2358bool VarDecl::isInitICE() const {
assert(isInitKnownICE() &&((isInitKnownICE() && "Check whether we already know that the initializer is an ICE"
) ? static_cast<void> (0) : __assert_fail ("isInitKnownICE() && \"Check whether we already know that the initializer is an ICE\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 2360, __PRETTY_FUNCTION__))
       "Check whether we already know that the initializer is an ICE")((isInitKnownICE() && "Check whether we already know that the initializer is an ICE"
) ? static_cast<void> (0) : __assert_fail ("isInitKnownICE() && \"Check whether we already know that the initializer is an ICE\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 2360, __PRETTY_FUNCTION__));
return Init.get<EvaluatedStmt *>()->IsICE;
2362}

2364bool 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())((!Init->isValueDependent()) ? static_cast<void> (0)
 : __assert_fail ("!Init->isValueDependent()", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 2376, __PRETTY_FUNCTION__));

// 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;
2398}

2400bool VarDecl::isParameterPack() const {
return isa<PackExpansionType>(getType());
2402}

2404template<typename DeclT>
2405static DeclT *getDefinitionOrSelf(DeclT *D) {
assert(D)((D) ? static_cast<void> (0) : __assert_fail ("D", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 2406, __PRETTY_FUNCTION__));
if (auto *Def = D->getDefinition())
  return Def;
return D;
2410}

2412bool VarDecl::isEscapingByref() const {
return hasAttr<BlocksAttr>() && NonParmVarDeclBits.EscapingByref;
2414}

2416bool VarDecl::isNonEscapingByref() const {
return hasAttr<BlocksAttr>() && !NonParmVarDeclBits.EscapingByref;
2418}

2420VarDecl *VarDecl::getTemplateInstantiationPattern() const {
const VarDecl *VD = this;

// If this is an instantiated member, walk back to the template from which
// it was instantiated.
if (MemberSpecializationInfo *MSInfo = VD->getMemberSpecializationInfo()) {
  if (isTemplateInstantiation(MSInfo->getTemplateSpecializationKind())) {
    VD = VD->getInstantiatedFromStaticDataMember();
    while (auto *NewVD = VD->getInstantiatedFromStaticDataMember())
      VD = NewVD;
  }
}

// If it's an instantiated variable template specialization, find the
// template or partial specialization from which it was instantiated.
if (auto *VDTemplSpec = dyn_cast<VarTemplateSpecializationDecl>(VD)) {
  if (isTemplateInstantiation(VDTemplSpec->getTemplateSpecializationKind())) {
    auto From = VDTemplSpec->getInstantiatedFrom();
    if (auto *VTD = From.dyn_cast<VarTemplateDecl *>()) {
      while (!VTD->isMemberSpecialization()) {
        auto *NewVTD = VTD->getInstantiatedFromMemberTemplate();
        if (!NewVTD)
          break;
        VTD = NewVTD;
      }
      return getDefinitionOrSelf(VTD->getTemplatedDecl());
    }
    if (auto *VTPSD =
            From.dyn_cast<VarTemplatePartialSpecializationDecl *>()) {
      while (!VTPSD->isMemberSpecialization()) {
        auto *NewVTPSD = VTPSD->getInstantiatedFromMember();
        if (!NewVTPSD)
          break;
        VTPSD = NewVTPSD;
      }
      return getDefinitionOrSelf<VarDecl>(VTPSD);
    }
  }
}

// If this is the pattern of a variable template, find where it was
// instantiated from. FIXME: Is this necessary?
if (VarTemplateDecl *VarTemplate = VD->getDescribedVarTemplate()) {
  while (!VarTemplate->isMemberSpecialization()) {
    auto *NewVT = VarTemplate->getInstantiatedFromMemberTemplate();
    if (!NewVT)
      break;
    VarTemplate = NewVT;
  }

  return getDefinitionOrSelf(VarTemplate->getTemplatedDecl());
}

if (VD == this)
  return nullptr;
return getDefinitionOrSelf(const_cast<VarDecl*>(VD));
2476}

2478VarDecl *VarDecl::getInstantiatedFromStaticDataMember() const {
if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo())
  return cast<VarDecl>(MSI->getInstantiatedFrom());

return nullptr;
2483}

2485TemplateSpecializationKind VarDecl::getTemplateSpecializationKind() const {
if (const auto *Spec = dyn_cast<VarTemplateSpecializationDecl>(this))
  return Spec->getSpecializationKind();

if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo())
  return MSI->getTemplateSpecializationKind();

return TSK_Undeclared;
2493}

2495TemplateSpecializationKind
2496VarDecl::getTemplateSpecializationKindForInstantiation() const {
if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo())
  return MSI->getTemplateSpecializationKind();

if (const auto *Spec = dyn_cast<VarTemplateSpecializationDecl>(this))
  return Spec->getSpecializationKind();

return TSK_Undeclared;
2504}

2506SourceLocation VarDecl::getPointOfInstantiation() const {
if (const auto *Spec = dyn_cast<VarTemplateSpecializationDecl>(this))
  return Spec->getPointOfInstantiation();

if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo())
  return MSI->getPointOfInstantiation();

return SourceLocation();
2514}

2516VarTemplateDecl *VarDecl::getDescribedVarTemplate() const {
return getASTContext().getTemplateOrSpecializationInfo(this)
    .dyn_cast<VarTemplateDecl *>();
2519}

2521void VarDecl::setDescribedVarTemplate(VarTemplateDecl *Template) {
getASTContext().setTemplateOrSpecializationInfo(this, Template);
2523}

2525bool 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();
2540}

2542bool VarDecl::isNoDestroy(const ASTContext &Ctx) const {
return hasGlobalStorage() && (hasAttr<NoDestroyAttr>() ||
                              (!Ctx.getLangOpts().RegisterStaticDestructors &&
                               !hasAttr<AlwaysDestroyAttr>()));
2546}

2548MemberSpecializationInfo *VarDecl::getMemberSpecializationInfo() const {
if (isStaticDataMember())
  // FIXME: Remove ?
  // return getASTContext().getInstantiatedFromStaticDataMember(this);
  return getASTContext().getTemplateOrSpecializationInfo(this)
      .dyn_cast<MemberSpecializationInfo *>();
return nullptr;
2555}

2557void VarDecl::setTemplateSpecializationKind(TemplateSpecializationKind TSK,
                                       SourceLocation PointOfInstantiation) {
assert((isa<VarTemplateSpecializationDecl>(this) ||(((isa<VarTemplateSpecializationDecl>(this) || getMemberSpecializationInfo
()) && "not a variable or static data member template specialization"
) ? static_cast<void> (0) : __assert_fail ("(isa<VarTemplateSpecializationDecl>(this) || getMemberSpecializationInfo()) && \"not a variable or static data member template specialization\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 2561, __PRETTY_FUNCTION__))
        getMemberSpecializationInfo()) &&(((isa<VarTemplateSpecializationDecl>(this) || getMemberSpecializationInfo
()) && "not a variable or static data member template specialization"
) ? static_cast<void> (0) : __assert_fail ("(isa<VarTemplateSpecializationDecl>(this) || getMemberSpecializationInfo()) && \"not a variable or static data member template specialization\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 2561, __PRETTY_FUNCTION__))
       "not a variable or static data member template specialization")(((isa<VarTemplateSpecializationDecl>(this) || getMemberSpecializationInfo
()) && "not a variable or static data member template specialization"
) ? static_cast<void> (0) : __assert_fail ("(isa<VarTemplateSpecializationDecl>(this) || getMemberSpecializationInfo()) && \"not a variable or static data member template specialization\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 2561, __PRETTY_FUNCTION__));

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);
  }
} else 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);
  }
}
2582}

2584void
2585VarDecl::setInstantiationOfStaticDataMember(VarDecl *VD,
                                          TemplateSpecializationKind TSK) {
assert(getASTContext().getTemplateOrSpecializationInfo(this).isNull() &&((getASTContext().getTemplateOrSpecializationInfo(this).isNull
() && "Previous template or instantiation?") ? static_cast
<void> (0) : __assert_fail ("getASTContext().getTemplateOrSpecializationInfo(this).isNull() && \"Previous template or instantiation?\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 2588, __PRETTY_FUNCTION__))
       "Previous template or instantiation?")((getASTContext().getTemplateOrSpecializationInfo(this).isNull
() && "Previous template or instantiation?") ? static_cast
<void> (0) : __assert_fail ("getASTContext().getTemplateOrSpecializationInfo(this).isNull() && \"Previous template or instantiation?\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 2588, __PRETTY_FUNCTION__));
getASTContext().setInstantiatedFromStaticDataMember(this, VD, TSK);
2590}

2592//===----------------------------------------------------------------------===//
2593// ParmVarDecl Implementation
2594//===----------------------------------------------------------------------===//

2596ParmVarDecl *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);
2603}

2605QualType 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;
2611}

2613ParmVarDecl *ParmVarDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID)
    ParmVarDecl(ParmVar, C, nullptr, SourceLocation(), SourceLocation(),
                nullptr, QualType(), nullptr, SC_None, nullptr);
2617}

2619SourceRange 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();
2632}

2634Expr *ParmVarDecl::getDefaultArg() {
assert(!hasUnparsedDefaultArg() && "Default argument is not yet parsed!")((!hasUnparsedDefaultArg() && "Default argument is not yet parsed!"
) ? static_cast<void> (0) : __assert_fail ("!hasUnparsedDefaultArg() && \"Default argument is not yet parsed!\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 2635, __PRETTY_FUNCTION__));
assert(!hasUninstantiatedDefaultArg() &&((!hasUninstantiatedDefaultArg() && "Default argument is not yet instantiated!"
) ? static_cast<void> (0) : __assert_fail ("!hasUninstantiatedDefaultArg() && \"Default argument is not yet instantiated!\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 2637, __PRETTY_FUNCTION__))
       "Default argument is not yet instantiated!")((!hasUninstantiatedDefaultArg() && "Default argument is not yet instantiated!"
) ? static_cast<void> (0) : __assert_fail ("!hasUninstantiatedDefaultArg() && \"Default argument is not yet instantiated!\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 2637, __PRETTY_FUNCTION__));

Expr *Arg = getInit();
if (auto *E = dyn_cast_or_null<FullExpr>(Arg))
  return E->getSubExpr();

return Arg;
2644}

2646void ParmVarDecl::setDefaultArg(Expr *defarg) {
ParmVarDeclBits.DefaultArgKind = DAK_Normal;
Init = defarg;
2649}

2651SourceRange 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.")::llvm::llvm_unreachable_internal("Invalid default argument kind."
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 2668);
2669}

2671void ParmVarDecl::setUninstantiatedDefaultArg(Expr *arg) {
ParmVarDeclBits.DefaultArgKind = DAK_Uninstantiated;
Init = arg;
2674}

2676Expr *ParmVarDecl::getUninstantiatedDefaultArg() {
assert(hasUninstantiatedDefaultArg() &&((hasUninstantiatedDefaultArg() && "Wrong kind of initialization expression!"
) ? static_cast<void> (0) : __assert_fail ("hasUninstantiatedDefaultArg() && \"Wrong kind of initialization expression!\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 2678, __PRETTY_FUNCTION__))
       "Wrong kind of initialization expression!")((hasUninstantiatedDefaultArg() && "Wrong kind of initialization expression!"
) ? static_cast<void> (0) : __assert_fail ("hasUninstantiatedDefaultArg() && \"Wrong kind of initialization expression!\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 2678, __PRETTY_FUNCTION__));
return cast_or_null<Expr>(Init.get<Stmt *>());
2680}

2682bool 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();
2688}

2690void ParmVarDecl::setParameterIndexLarge(unsigned parameterIndex) {
getASTContext().setParameterIndex(this, parameterIndex);
ParmVarDeclBits.ParameterIndex = ParameterIndexSentinel;
2693}

2695unsigned ParmVarDecl::getParameterIndexLarge() const {
return getASTContext().getParameterIndex(this);
2697}

2699//===----------------------------------------------------------------------===//
2700// FunctionDecl Implementation
2701//===----------------------------------------------------------------------===//

2703FunctionDecl::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())((T.isNull() || T->isFunctionType()) ? static_cast<void
> (0) : __assert_fail ("T.isNull() || T->isFunctionType()"
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 2712, __PRETTY_FUNCTION__));
FunctionDeclBits.SClass = S;
FunctionDeclBits.IsInline = isInlineSpecified;
FunctionDeclBits.IsInlineSpecified = isInlineSpecified;
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;
2735}

2737void 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);
2743}

2745bool FunctionDecl::isVariadic() const {
if (const auto *FT = getType()->getAs<FunctionProtoType>())
  return FT->isVariadic();
return false;
2749}

2751bool FunctionDecl::hasBody(const FunctionDecl *&Definition) const {
for (auto I : redecls()) {
  if (I->doesThisDeclarationHaveABody()) {
    Definition = I;
    return true;
  }
}

return false;
2760}

2762bool FunctionDecl::hasTrivialBody() const
2763{
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;
2774}

2776bool FunctionDecl::isDefined(const FunctionDecl *&Definition) const {
for (auto I : redecls()) {
  if (I->isThisDeclarationADefinition()) {
    Definition = I;
    return true;
  }
}

return false;
2785}

2787Stmt *FunctionDecl::getBody(const FunctionDecl *&Definition) const {
if (!hasBody(Definition))
  return nullptr;

if (Definition->Body)
  return Definition->Body.get(getASTContext().getExternalSource());

return nullptr;
2795}

2797void FunctionDecl::setBody(Stmt *B) {
Body = B;
if (B)
  EndRangeLoc = B->getEndLoc();
2801}

2803void FunctionDecl::setPure(bool P) {
FunctionDeclBits.IsPure = P;
if (P)
  if (auto *Parent = dyn_cast<CXXRecordDecl>(getDeclContext()))
    Parent->markedVirtualFunctionPure();
2808}

2810template<std::size_t Len>
2811static bool isNamed(const NamedDecl *ND, const char (&Str)[Len]) {
IdentifierInfo *II = ND->getIdentifier();
return II && II->isStr(Str);
2814}

2816bool FunctionDecl::isMain() const {
const TranslationUnitDecl *tunit =
  dyn_cast<TranslationUnitDecl>(getDeclContext()->getRedeclContext());
return tunit &&
       !tunit->getASTContext().getLangOpts().Freestanding &&
       isNamed(this, "main");
2822}

2824bool 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);
2849}

2851bool FunctionDecl::isReservedGlobalPlacementOperator() const {
assert(getDeclName().getNameKind() == DeclarationName::CXXOperatorName)((getDeclName().getNameKind() == DeclarationName::CXXOperatorName
) ? static_cast<void> (0) : __assert_fail ("getDeclName().getNameKind() == DeclarationName::CXXOperatorName"
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 2852, __PRETTY_FUNCTION__));
assert(getDeclName().getCXXOverloadedOperator() == OO_New ||((getDeclName().getCXXOverloadedOperator() == OO_New || getDeclName
().getCXXOverloadedOperator() == OO_Delete || getDeclName().getCXXOverloadedOperator
() == OO_Array_New || getDeclName().getCXXOverloadedOperator(
) == OO_Array_Delete) ? static_cast<void> (0) : __assert_fail
 ("getDeclName().getCXXOverloadedOperator() == OO_New || getDeclName().getCXXOverloadedOperator() == OO_Delete || getDeclName().getCXXOverloadedOperator() == OO_Array_New || getDeclName().getCXXOverloadedOperator() == OO_Array_Delete"
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 2856, __PRETTY_FUNCTION__))
       getDeclName().getCXXOverloadedOperator() == OO_Delete ||((getDeclName().getCXXOverloadedOperator() == OO_New || getDeclName
().getCXXOverloadedOperator() == OO_Delete || getDeclName().getCXXOverloadedOperator
() == OO_Array_New || getDeclName().getCXXOverloadedOperator(
) == OO_Array_Delete) ? static_cast<void> (0) : __assert_fail
 ("getDeclName().getCXXOverloadedOperator() == OO_New || getDeclName().getCXXOverloadedOperator() == OO_Delete || getDeclName().getCXXOverloadedOperator() == OO_Array_New || getDeclName().getCXXOverloadedOperator() == OO_Array_Delete"
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 2856, __PRETTY_FUNCTION__))
       getDeclName().getCXXOverloadedOperator() == OO_Array_New ||((getDeclName().getCXXOverloadedOperator() == OO_New || getDeclName
().getCXXOverloadedOperator() == OO_Delete || getDeclName().getCXXOverloadedOperator
() == OO_Array_New || getDeclName().getCXXOverloadedOperator(
) == OO_Array_Delete) ? static_cast<void> (0) : __assert_fail
 ("getDeclName().getCXXOverloadedOperator() == OO_New || getDeclName().getCXXOverloadedOperator() == OO_Delete || getDeclName().getCXXOverloadedOperator() == OO_Array_New || getDeclName().getCXXOverloadedOperator() == OO_Array_Delete"
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 2856, __PRETTY_FUNCTION__))
       getDeclName().getCXXOverloadedOperator() == OO_Array_Delete)((getDeclName().getCXXOverloadedOperator() == OO_New || getDeclName
().getCXXOverloadedOperator() == OO_Delete || getDeclName().getCXXOverloadedOperator
() == OO_Array_New || getDeclName().getCXXOverloadedOperator(
) == OO_Array_Delete) ? static_cast<void> (0) : __assert_fail
 ("getDeclName().getCXXOverloadedOperator() == OO_New || getDeclName().getCXXOverloadedOperator() == OO_Delete || getDeclName().getCXXOverloadedOperator() == OO_Array_New || getDeclName().getCXXOverloadedOperator() == OO_Array_Delete"
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 2856, __PRETTY_FUNCTION__));

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);
2872}

2874bool 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();
2938}

2940bool 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");
2952}

2954LanguageLinkage FunctionDecl::getLanguageLinkage() const {
return getDeclLanguageLinkage(*this);
2956}

2958bool FunctionDecl::isExternC() const {
return isDeclExternC(*this);
2960}

2962bool FunctionDecl::isInExternCContext() const {
if (hasAttr<OpenCLKernelAttr>())
  return true;
return getLexicalDeclContext()->isExternCContext();
2966}

2968bool FunctionDecl::isInExternCXXContext() const {
return getLexicalDeclContext()->isExternCXXContext();
2970}

2972bool 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;
2990}

2992bool FunctionDecl::isNoReturn() const {
if (hasAttr<NoReturnAttr>() || hasAttr<CXX11NoReturnAttr>() ||
    hasAttr<C11NoReturnAttr>())
  return true;

if (auto *FnTy = getType()->getAs<FunctionType>())
  return FnTy->getNoReturnAttr();

return false;
3001}


3004MultiVersionKind FunctionDecl::getMultiVersionKind() const {
if (hasAttr<TargetAttr>())
  return MultiVersionKind::Target;
if (hasAttr<CPUDispatchAttr>())
  return MultiVersionKind::CPUDispatch;
if (hasAttr<CPUSpecificAttr>())
  return MultiVersionKind::CPUSpecific;
return MultiVersionKind::None;
3012}

3014bool FunctionDecl::isCPUDispatchMultiVersion() const {
return isMultiVersion() && hasAttr<CPUDispatchAttr>();
3016}

3018bool FunctionDecl::isCPUSpecificMultiVersion() const {
return isMultiVersion() && hasAttr<CPUSpecificAttr>();
3020}

3022bool FunctionDecl::isTargetMultiVersion() const {
return isMultiVersion() && hasAttr<TargetAttr>();
3024}

3026void
3027FunctionDecl::setPreviousDeclaration(FunctionDecl *PrevDecl) {
redeclarable_base::setPreviousDecl(PrevDecl);

if (FunctionTemplateDecl *FunTmpl = getDescribedFunctionTemplate()) {
  FunctionTemplateDecl *PrevFunTmpl
    = PrevDecl? PrevDecl->getDescribedFunctionTemplate() : nullptr;
  assert((!PrevDecl || PrevFunTmpl) && "Function/function template mismatch")(((!PrevDecl || PrevFunTmpl) && "Function/function template mismatch"
) ? static_cast<void> (0) : __assert_fail ("(!PrevDecl || PrevFunTmpl) && \"Function/function template mismatch\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 3033, __PRETTY_FUNCTION__));
  FunTmpl->setPreviousDecl(PrevFunTmpl);
}

if (PrevDecl && PrevDecl->isInlined())
  setImplicitlyInline(true);
3039}

3041FunctionDecl *FunctionDecl::getCanonicalDecl() { return getFirstDecl(); }

3043/// Returns a value indicating whether this function corresponds to a builtin
3044/// function.
3045///
3046/// The function corresponds to a built-in function if it is declared at
3047/// translation scope or within an extern "C" block and its name matches with
3048/// the name of a builtin. The returned value will be 0 for functions that do
3049/// not correspond to a builtin, a value of type \c Builtin::ID if in the
3050/// target-independent range \c [1,Builtin::First), or a target-specific builtin
3051/// value.
3052///
3053/// \param ConsiderWrapperFunctions If true, we should consider wrapper
3054/// functions as their wrapped builtins. This shouldn't be done in general, but
3055/// it's useful in Sema to diagnose calls to wrappers based on their semantics.
3056unsigned FunctionDecl::getBuiltinID(bool ConsiderWrapperFunctions) 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 (!ConsiderWrapperFunctions && 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 (!ConsiderWrapperFunctions && 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;
3112}

3114/// getNumParams - Return the number of parameters this function must have
3115/// based on its FunctionType.  This is the length of the ParamInfo array
3116/// after it has been created.
3117unsigned FunctionDecl::getNumParams() const {
const auto *FPT = getType()->getAs<FunctionProtoType>();
return FPT ? FPT->getNumParams() : 0;
3120}

3122void FunctionDecl::setParams(ASTContext &C,
                           ArrayRef<ParmVarDecl *> NewParamInfo) {
assert(!ParamInfo && "Already has param info!")((!ParamInfo && "Already has param info!") ? static_cast
<void> (0) : __assert_fail ("!ParamInfo && \"Already has param info!\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 3124, __PRETTY_FUNCTION__));
assert(NewParamInfo.size() == getNumParams() && "Parameter count mismatch!")((NewParamInfo.size() == getNumParams() && "Parameter count mismatch!"
) ? static_cast<void> (0) : __assert_fail ("NewParamInfo.size() == getNumParams() && \"Parameter count mismatch!\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 3125, __PRETTY_FUNCTION__));

// Zero params -> null pointer.
if (!NewParamInfo.empty()) {
  ParamInfo = new (C) ParmVarDecl*[NewParamInfo.size()];
  std::copy(NewParamInfo.begin(), NewParamInfo.end(), ParamInfo);
}
3132}

3134/// getMinRequiredArguments - Returns the minimum number of arguments
3135/// needed to call this function. This may be fewer than the number of
3136/// function parameters, if some of the parameters have default
3137/// arguments (in C++) or are parameter packs (C++11).
3138unsigned FunctionDecl::getMinRequiredArguments() const {
if (!getASTContext().getLangOpts().CPlusPlus)
  return getNumParams();

unsigned NumRequiredArgs = 0;
for (auto *Param : parameters())
  if (!Param->isParameterPack() && !Param->hasDefaultArg())
    ++NumRequiredArgs;
return NumRequiredArgs;
3147}

3149/// The combination of the extern and inline keywords under MSVC forces
3150/// the function to be required.
3151///
3152/// Note: This function assumes that we will only get called when isInlined()
3153/// would return true for this FunctionDecl.
3154bool FunctionDecl::isMSExternInline() const {
assert(isInlined() && "expected to get called on an inlined function!")((isInlined() && "expected to get called on an inlined function!"
) ? static_cast<void> (0) : __assert_fail ("isInlined() && \"expected to get called on an inlined function!\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 3155, __PRETTY_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;
3168}

3170static 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;
3180}

3182static 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;
3196}

3198/// For a function declaration in C or C++, determine whether this
3199/// declaration causes the definition to be externally visible.
3200///
3201/// For instance, this determines if adding the current declaration to the set
3202/// of redeclarations of the given functions causes
3203/// isInlineDefinitionExternallyVisible to change from false to true.
3204bool FunctionDecl::doesDeclarationForceExternallyVisibleDefinition() const {
assert(!doesThisDeclarationHaveABody() &&((!doesThisDeclarationHaveABody() && "Must have a declaration without a body."
) ? static_cast<void> (0) : __assert_fail ("!doesThisDeclarationHaveABody() && \"Must have a declaration without a body.\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 3206, __PRETTY_FUNCTION__))
       "Must have a declaration without a body.")((!doesThisDeclarationHaveABody() && "Must have a declaration without a body."
) ? static_cast<void> (0) : __assert_fail ("!doesThisDeclarationHaveABody() && \"Must have a declaration without a body.\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 3206, __PRETTY_FUNCTION__));

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;
3262}

3264SourceRange 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;
3282}

3284SourceRange 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();
3294}

3296/// For an inline function definition in C, or for a gnu_inline function
3297/// in C++, determine whether the definition will be externally visible.
3298///
3299/// Inline function definitions are always available for inlining optimizations.
3300/// However, depending on the language dialect, declaration specifiers, and
3301/// attributes, the definition of an inline function may or may not be
3302/// "externally" visible to other translation units in the program.
3303///
3304/// In C99, inline definitions are not externally visible by default. However,
3305/// if even one of the global-scope declarations is marked "extern inline", the
3306/// inline definition becomes externally visible (C99 6.7.4p6).
3307///
3308/// In GNU89 mode, or if the gnu_inline attribute is attached to the function
3309/// definition, we use the GNU semantics for inline, which are nearly the
3310/// opposite of C99 semantics. In particular, "inline" by itself will create
3311/// an externally visible symbol, but "extern inline" will not create an
3312/// externally visible symbol.
3313bool FunctionDecl::isInlineDefinitionExternallyVisible() const {
assert((doesThisDeclarationHaveABody() || willHaveBody()) &&(((doesThisDeclarationHaveABody() || willHaveBody()) &&
 "Must be a function definition") ? static_cast<void> (
0) : __assert_fail ("(doesThisDeclarationHaveABody() || willHaveBody()) && \"Must be a function definition\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 3315, __PRETTY_FUNCTION__))
       "Must be a function definition")(((doesThisDeclarationHaveABody() || willHaveBody()) &&
 "Must be a function definition") ? static_cast<void> (
0) : __assert_fail ("(doesThisDeclarationHaveABody() || willHaveBody()) && \"Must be a function definition\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 3315, __PRETTY_FUNCTION__));
assert(isInlined() && "Function must be inline")((isInlined() && "Function must be inline") ? static_cast
<void> (0) : __assert_fail ("isInlined() && \"Function must be inline\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 3316, __PRETTY_FUNCTION__));
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 &&((!Context.getLangOpts().CPlusPlus && "should not use C inline rules in C++"
) ? static_cast<void> (0) : __assert_fail ("!Context.getLangOpts().CPlusPlus && \"should not use C inline rules in C++\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 3342, __PRETTY_FUNCTION__))
       "should not use C inline rules in C++")((!Context.getLangOpts().CPlusPlus && "should not use C inline rules in C++"
) ? static_cast<void> (0) : __assert_fail ("!Context.getLangOpts().CPlusPlus && \"should not use C inline rules in C++\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 3342, __PRETTY_FUNCTION__));

// 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;
3358}

3360/// getOverloadedOperator - Which C++ overloaded operator this
3361/// function represents, if any.
3362OverloadedOperatorKind FunctionDecl::getOverloadedOperator() const {
if (getDeclName().getNameKind() == DeclarationName::CXXOperatorName)
  return getDeclName().getCXXOverloadedOperator();
else
  return OO_None;
3367}

3369/// getLiteralIdentifier - The literal suffix identifier this function
3370/// represents, if any.
3371const IdentifierInfo *FunctionDecl::getLiteralIdentifier() const {
if (getDeclName().getNameKind() == DeclarationName::CXXLiteralOperatorName)
  return getDeclName().getCXXLiteralIdentifier();
else
  return nullptr;
3376}

3378FunctionDecl::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?")::llvm::llvm_unreachable_internal("Did we miss a TemplateOrSpecialization type?"
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 3391);
3392}

3394FunctionDecl *FunctionDecl::getInstantiatedFromMemberFunction() const {
if (MemberSpecializationInfo *Info = getMemberSpecializationInfo())
  return cast<FunctionDecl>(Info->getInstantiatedFrom());

return nullptr;
3399}

3401MemberSpecializationInfo *FunctionDecl::getMemberSpecializationInfo() const {
if (auto *MSI =
        TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo *>())
  return MSI;
if (auto *FTSI = TemplateOrSpecialization
                     .dyn_cast<FunctionTemplateSpecializationInfo *>())
  return FTSI->getMemberSpecializationInfo();
return nullptr;
3409}

3411void
3412FunctionDecl::setInstantiationOfMemberFunction(ASTContext &C,
                                             FunctionDecl *FD,
                                             TemplateSpecializationKind TSK) {
assert(TemplateOrSpecialization.isNull() &&((TemplateOrSpecialization.isNull() && "Member function is already a specialization"
) ? static_cast<void> (0) : __assert_fail ("TemplateOrSpecialization.isNull() && \"Member function is already a specialization\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 3416, __PRETTY_FUNCTION__))
       "Member function is already a specialization")((TemplateOrSpecialization.isNull() && "Member function is already a specialization"
) ? static_cast<void> (0) : __assert_fail ("TemplateOrSpecialization.isNull() && \"Member function is already a specialization\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 3416, __PRETTY_FUNCTION__));
MemberSpecializationInfo *Info
  = new (C) MemberSpecializationInfo(FD, TSK);
TemplateOrSpecialization = Info;
3420}

3422FunctionTemplateDecl *FunctionDecl::getDescribedFunctionTemplate() const {
return TemplateOrSpecialization.dyn_cast<FunctionTemplateDecl *>();
3424}

3426void FunctionDecl::setDescribedFunctionTemplate(FunctionTemplateDecl *Template) {
assert(TemplateOrSpecialization.isNull() &&((TemplateOrSpecialization.isNull() && "Member function is already a specialization"
) ? static_cast<void> (0) : __assert_fail ("TemplateOrSpecialization.isNull() && \"Member function is already a specialization\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 3428, __PRETTY_FUNCTION__))
       "Member function is already a specialization")((TemplateOrSpecialization.isNull() && "Member function is already a specialization"
) ? static_cast<void> (0) : __assert_fail ("TemplateOrSpecialization.isNull() && \"Member function is already a specialization\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 3428, __PRETTY_FUNCTION__));
TemplateOrSpecialization = Template;
3430}

3432bool FunctionDecl::isImplicitlyInstantiable() const {
// If the function is invalid, it can't be implicitly instantiated.
if (isInvalidDecl())
  return false;

switch (getTemplateSpecializationKindForInstantiation()) {
case TSK_Undeclared:
case TSK_ExplicitInstantiationDefinition:
case TSK_ExplicitSpecialization:
  return false;

case TSK_ImplicitInstantiation:
  return true;

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();
3465}

3467bool FunctionDecl::isTemplateInstantiation() const {
// FIXME: Remove this, it's not clear what it means. (Which template
// specialization kind?)
return clang::isTemplateInstantiation(getTemplateSpecializationKind());
3471}

3473FunctionDecl *FunctionDecl::getTemplateInstantiationPattern() const {
// 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?")((getPrimaryTemplate() && "not a generic lambda call operator?"
) ? static_cast<void> (0) : __assert_fail ("getPrimaryTemplate() && \"not a generic lambda call operator?\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 3485, __PRETTY_FUNCTION__));
  return getDefinitionOrSelf(getPrimaryTemplate()->getTemplatedDecl());
}

if (MemberSpecializationInfo *Info = getMemberSpecializationInfo()) {
  if (!clang::isTemplateInstantiation(Info->getTemplateSpecializationKind()))
    return nullptr;
  return getDefinitionOrSelf(cast<FunctionDecl>(Info->getInstantiatedFrom()));
}

if (!clang::isTemplateInstantiation(getTemplateSpecializationKind()))
  return nullptr;

if (FunctionTemplateDecl *Primary = getPrimaryTemplate()) {
  // If we hit a point where the user provided a specialization of this
  // template, we're done looking.
  while (!Primary->isMemberSpecialization()) {
    auto *NewPrimary = Primary->getInstantiatedFromMemberTemplate();
    if (!NewPrimary)
      break;
    Primary = NewPrimary;
  }

  return getDefinitionOrSelf(Primary->getTemplatedDecl());
}

return nullptr;
3512}

3514FunctionTemplateDecl *FunctionDecl::getPrimaryTemplate() const {
if (FunctionTemplateSpecializationInfo *Info
      = TemplateOrSpecialization
          .dyn_cast<FunctionTemplateSpecializationInfo*>()) {
  return Info->getTemplate();
}
return nullptr;
3521}

3523FunctionTemplateSpecializationInfo *
3524FunctionDecl::getTemplateSpecializationInfo() const {
return TemplateOrSpecialization
    .dyn_cast<FunctionTemplateSpecializationInfo *>();
3527}

3529const TemplateArgumentList *
3530FunctionDecl::getTemplateSpecializationArgs() const {
if (FunctionTemplateSpecializationInfo *Info
      = TemplateOrSpecialization
          .dyn_cast<FunctionTemplateSpecializationInfo*>()) {
  return Info->TemplateArguments;
}
return nullptr;
3537}

3539const ASTTemplateArgumentListInfo *
3540FunctionDecl::getTemplateSpecializationArgsAsWritten() const {
if (FunctionTemplateSpecializationInfo *Info
      = TemplateOrSpecialization
          .dyn_cast<FunctionTemplateSpecializationInfo*>()) {
  return Info->TemplateArgumentsAsWritten;
}
return nullptr;
3547}

3549void
3550FunctionDecl::setFunctionTemplateSpecialization(ASTContext &C,
                                              FunctionTemplateDecl *Template,
                                   const TemplateArgumentList *TemplateArgs,
                                              void *InsertPos,
                                              TemplateSpecializationKind TSK,
                      const TemplateArgumentListInfo *TemplateArgsAsWritten,
                                        SourceLocation PointOfInstantiation) {
assert((TemplateOrSpecialization.isNull() ||(((TemplateOrSpecialization.isNull() || TemplateOrSpecialization
.is<MemberSpecializationInfo *>()) && "Member function is already a specialization"
) ? static_cast<void> (0) : __assert_fail ("(TemplateOrSpecialization.isNull() || TemplateOrSpecialization.is<MemberSpecializationInfo *>()) && \"Member function is already a specialization\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 3559, __PRETTY_FUNCTION__))
        TemplateOrSpecialization.is<MemberSpecializationInfo *>()) &&(((TemplateOrSpecialization.isNull() || TemplateOrSpecialization
.is<MemberSpecializationInfo *>()) && "Member function is already a specialization"
) ? static_cast<void> (0) : __assert_fail ("(TemplateOrSpecialization.isNull() || TemplateOrSpecialization.is<MemberSpecializationInfo *>()) && \"Member function is already a specialization\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 3559, __PRETTY_FUNCTION__))
       "Member function is already a specialization")(((TemplateOrSpecialization.isNull() || TemplateOrSpecialization
.is<MemberSpecializationInfo *>()) && "Member function is already a specialization"
) ? static_cast<void> (0) : __assert_fail ("(TemplateOrSpecialization.isNull() || TemplateOrSpecialization.is<MemberSpecializationInfo *>()) && \"Member function is already a specialization\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 3559, __PRETTY_FUNCTION__));
assert(TSK != TSK_Undeclared &&((TSK != TSK_Undeclared && "Must specify the type of function template specialization"
) ? static_cast<void> (0) : __assert_fail ("TSK != TSK_Undeclared && \"Must specify the type of function template specialization\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 3561, __PRETTY_FUNCTION__))
       "Must specify the type of function template specialization")((TSK != TSK_Undeclared && "Must specify the type of function template specialization"
) ? static_cast<void> (0) : __assert_fail ("TSK != TSK_Undeclared && \"Must specify the type of function template specialization\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 3561, __PRETTY_FUNCTION__));
assert((TemplateOrSpecialization.isNull() ||(((TemplateOrSpecialization.isNull() || TSK == TSK_ExplicitSpecialization
) && "Member specialization must be an explicit specialization"
) ? static_cast<void> (0) : __assert_fail ("(TemplateOrSpecialization.isNull() || TSK == TSK_ExplicitSpecialization) && \"Member specialization must be an explicit specialization\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 3564, __PRETTY_FUNCTION__))
        TSK == TSK_ExplicitSpecialization) &&(((TemplateOrSpecialization.isNull() || TSK == TSK_ExplicitSpecialization
) && "Member specialization must be an explicit specialization"
) ? static_cast<void> (0) : __assert_fail ("(TemplateOrSpecialization.isNull() || TSK == TSK_ExplicitSpecialization) && \"Member specialization must be an explicit specialization\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 3564, __PRETTY_FUNCTION__))
       "Member specialization must be an explicit specialization")(((TemplateOrSpecialization.isNull() || TSK == TSK_ExplicitSpecialization
) && "Member specialization must be an explicit specialization"
) ? static_cast<void> (0) : __assert_fail ("(TemplateOrSpecialization.isNull() || TSK == TSK_ExplicitSpecialization) && \"Member specialization must be an explicit specialization\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 3564, __PRETTY_FUNCTION__));
FunctionTemplateSpecializationInfo *Info =
    FunctionTemplateSpecializationInfo::Create(
        C, this, Template, TSK, TemplateArgs, TemplateArgsAsWritten,
        PointOfInstantiation,
        TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo *>());
TemplateOrSpecialization = Info;
Template->addSpecialization(Info, InsertPos);
3572}

3574void
3575FunctionDecl::setDependentTemplateSpecialization(ASTContext &Context,
                                  const UnresolvedSetImpl &Templates,
                           const TemplateArgumentListInfo &TemplateArgs) {
assert(TemplateOrSpecialization.isNull())((TemplateOrSpecialization.isNull()) ? static_cast<void>
 (0) : __assert_fail ("TemplateOrSpecialization.isNull()", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 3578, __PRETTY_FUNCTION__));
DependentFunctionTemplateSpecializationInfo *Info =
    DependentFunctionTemplateSpecializationInfo::Create(Context, Templates,
                                                        TemplateArgs);
TemplateOrSpecialization = Info;
3583}

3585DependentFunctionTemplateSpecializationInfo *
3586FunctionDecl::getDependentSpecializationInfo() const {
return TemplateOrSpecialization
    .dyn_cast<DependentFunctionTemplateSpecializationInfo *>();
3589}

3591DependentFunctionTemplateSpecializationInfo *
3592DependentFunctionTemplateSpecializationInfo::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);
3599}

3601DependentFunctionTemplateSpecializationInfo::
3602DependentFunctionTemplateSpecializationInfo(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]);
3615}

3617TemplateSpecializationKind FunctionDecl::getTemplateSpecializationKind() const {
// For a function template specialization, query the specialization
// information object.
if (FunctionTemplateSpecializationInfo *FTSInfo =
        TemplateOrSpecialization
            .dyn_cast<FunctionTemplateSpecializationInfo *>())
  return FTSInfo->getTemplateSpecializationKind();

if (MemberSpecializationInfo *MSInfo =
        TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo *>())
  return MSInfo->getTemplateSpecializationKind();

return TSK_Undeclared;
3630}

3632TemplateSpecializationKind
3633FunctionDecl::getTemplateSpecializationKindForInstantiation() const {
// This is the same as getTemplateSpecializationKind(), except that for a
// function that is both a function template specialization and a member
// specialization, we prefer the member specialization information. Eg:
//
// template<typename T> struct A {
//   template<typename U> void f() {}
//   template<> void f<int>() {}
// };
//
// For A<int>::f<int>():
// * getTemplateSpecializationKind() will return TSK_ExplicitSpecialization
// * getTemplateSpecializationKindForInstantiation() will return
//       TSK_ImplicitInstantiation
//
// This reflects the facts that A<int>::f<int> is an explicit specialization
// of A<int>::f, and that A<int>::f<int> should be implicitly instantiated
// from A::f<int> if a definition is needed.
if (FunctionTemplateSpecializationInfo *FTSInfo =
        TemplateOrSpecialization
            .dyn_cast<FunctionTemplateSpecializationInfo *>()) {
  if (auto *MSInfo = FTSInfo->getMemberSpecializationInfo())
    return MSInfo->getTemplateSpecializationKind();
  return FTSInfo->getTemplateSpecializationKind();
}

if (MemberSpecializationInfo *MSInfo =
        TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo *>())
  return MSInfo->getTemplateSpecializationKind();

return TSK_Undeclared;
3664}

3666void
3667FunctionDecl::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")::llvm::llvm_unreachable_internal("Function cannot have a template specialization kind"
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 3691);
3692}

3694SourceLocation 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();
3704}

3706bool 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;
3727}

3729SourceRange FunctionDecl::getSourceRange() const {
return SourceRange(getOuterLocStart(), EndRangeLoc);
3731}

3733unsigned 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;

3756//  case Builtin::BIstrlcpy:
3757//  case Builtin::BI__builtin___strlcpy_chk:
3758//    return Builtin::BIstrlcpy;

3760//  case Builtin::BIstrlcat:
3761//  case Builtin::BI__builtin___strlcat_chk:
3762//    return Builtin::BIstrlcat;

case Builtin::BI__builtin_memcmp:
case Builtin::BImemcmp:
  return Builtin::BImemcmp;

case Builtin::BI__builtin_bcmp:
case Builtin::BIbcmp:
  return Builtin::BIbcmp;

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("bcmp"))
      return Builtin::BIbcmp;
    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;
3832}

3834unsigned FunctionDecl::getODRHash() const {
assert(hasODRHash())((hasODRHash()) ? static_cast<void> (0) : __assert_fail
 ("hasODRHash()", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 3835, __PRETTY_FUNCTION__));
return ODRHash;
3837}

3839unsigned 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;
3854}

3856//===----------------------------------------------------------------------===//
3857// FieldDecl Implementation
3858//===----------------------------------------------------------------------===//

3860FieldDecl *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);
3867}

3869FieldDecl *FieldDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID) FieldDecl(Field, nullptr, SourceLocation(),
                             SourceLocation(), nullptr, QualType(), nullptr,
                             nullptr, false, ICIS_NoInit);
3873}

3875bool FieldDecl::isAnonymousStructOrUnion() const {
if (!isImplicit() || getDeclName())
  return false;

if (const auto *Record = getType()->getAs<RecordType>())
  return Record->getDecl()->isAnonymousStructOrUnion();

return false;
3883}

3885unsigned FieldDecl::getBitWidthValue(const ASTContext &Ctx) const {
assert(isBitField() && "not a bitfield")((isBitField() && "not a bitfield") ? static_cast<
void> (0) : __assert_fail ("isBitField() && \"not a bitfield\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 3886, __PRETTY_FUNCTION__));
return getBitWidth()->EvaluateKnownConstInt(Ctx).getZExtValue();
3888}

3890bool FieldDecl::isZeroLengthBitField(const ASTContext &Ctx) const {
return isUnnamedBitfield() && !getBitWidth()->isValueDependent() &&
       getBitWidthValue(Ctx) == 0;
3893}

3895unsigned 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")((RD && "requested index for field of struct with no definition"
) ? static_cast<void> (0) : __assert_fail ("RD && \"requested index for field of struct with no definition\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 3904, __PRETTY_FUNCTION__));

for (auto *Field : RD->fields()) {
  Field->getCanonicalDecl()->CachedFieldIndex = Index + 1;
  ++Index;
}

assert(CachedFieldIndex && "failed to find field in parent")((CachedFieldIndex && "failed to find field in parent"
) ? static_cast<void> (0) : __assert_fail ("CachedFieldIndex && \"failed to find field in parent\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 3911, __PRETTY_FUNCTION__));
return CachedFieldIndex - 1;
3913}

3915SourceRange FieldDecl::getSourceRange() const {
const Expr *FinalExpr = getInClassInitializer();
if (!FinalExpr)
  FinalExpr = getBitWidth();
if (FinalExpr)
  return SourceRange(getInnerLocStart(), FinalExpr->getEndLoc());
return DeclaratorDecl::getSourceRange();
3922}

3924void FieldDecl::setCapturedVLAType(const VariableArrayType *VLAType) {
assert((getParent()->isLambda() || getParent()->isCapturedRecord()) &&(((getParent()->isLambda() || getParent()->isCapturedRecord
()) && "capturing type in non-lambda or captured record."
) ? static_cast<void> (0) : __assert_fail ("(getParent()->isLambda() || getParent()->isCapturedRecord()) && \"capturing type in non-lambda or captured record.\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 3926, __PRETTY_FUNCTION__))
       "capturing type in non-lambda or captured record.")(((getParent()->isLambda() || getParent()->isCapturedRecord
()) && "capturing type in non-lambda or captured record."
) ? static_cast<void> (0) : __assert_fail ("(getParent()->isLambda() || getParent()->isCapturedRecord()) && \"capturing type in non-lambda or captured record.\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 3926, __PRETTY_FUNCTION__));
assert(InitStorage.getInt() == ISK_NoInit &&((InitStorage.getInt() == ISK_NoInit && InitStorage.getPointer
() == nullptr && "bit width, initializer or captured type already set"
) ? static_cast<void> (0) : __assert_fail ("InitStorage.getInt() == ISK_NoInit && InitStorage.getPointer() == nullptr && \"bit width, initializer or captured type already set\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 3929, __PRETTY_FUNCTION__))
       InitStorage.getPointer() == nullptr &&((InitStorage.getInt() == ISK_NoInit && InitStorage.getPointer
() == nullptr && "bit width, initializer or captured type already set"
) ? static_cast<void> (0) : __assert_fail ("InitStorage.getInt() == ISK_NoInit && InitStorage.getPointer() == nullptr && \"bit width, initializer or captured type already set\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 3929, __PRETTY_FUNCTION__))
       "bit width, initializer or captured type already set")((InitStorage.getInt() == ISK_NoInit && InitStorage.getPointer
() == nullptr && "bit width, initializer or captured type already set"
) ? static_cast<void> (0) : __assert_fail ("InitStorage.getInt() == ISK_NoInit && InitStorage.getPointer() == nullptr && \"bit width, initializer or captured type already set\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 3929, __PRETTY_FUNCTION__));
InitStorage.setPointerAndInt(const_cast<VariableArrayType *>(VLAType),
                             ISK_CapturedVLAType);
3932}

3934//===----------------------------------------------------------------------===//
3935// TagDecl Implementation
3936//===----------------------------------------------------------------------===//

3938TagDecl::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) &&(((DK != Enum || TK == TTK_Enum) && "EnumDecl not matched with TTK_Enum"
) ? static_cast<void> (0) : __assert_fail ("(DK != Enum || TK == TTK_Enum) && \"EnumDecl not matched with TTK_Enum\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 3944, __PRETTY_FUNCTION__))
       "EnumDecl not matched with TTK_Enum")(((DK != Enum || TK == TTK_Enum) && "EnumDecl not matched with TTK_Enum"
) ? static_cast<void> (0) : __assert_fail ("(DK != Enum || TK == TTK_Enum) && \"EnumDecl not matched with TTK_Enum\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 3944, __PRETTY_FUNCTION__));
setPreviousDecl(PrevDecl);
setTagKind(TK);
setCompleteDefinition(false);
setBeingDefined(false);
setEmbeddedInDeclarator(false);
setFreeStanding(false);
setCompleteDefinitionRequired(false);
3952}

3954SourceLocation TagDecl::getOuterLocStart() const {
return getTemplateOrInnerLocStart(this);
3956}

3958SourceRange TagDecl::getSourceRange() const {
SourceLocation RBraceLoc = BraceRange.getEnd();
SourceLocation E = RBraceLoc.isValid() ? RBraceLoc : getLocation();
return SourceRange(getOuterLocStart(), E);
3962}

3964TagDecl *TagDecl::getCanonicalDecl() { return getFirstDecl(); }

3966void TagDecl::setTypedefNameForAnonDecl(TypedefNameDecl *TDD) {
TypedefNameDeclOrQualifier = TDD;
if (const Type *T = getTypeForDecl()) {
  (void)T;
  assert(T->isLinkageValid())((T->isLinkageValid()) ? static_cast<void> (0) : __assert_fail
 ("T->isLinkageValid()", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 3970, __PRETTY_FUNCTION__));
}
assert(isLinkageValid())((isLinkageValid()) ? static_cast<void> (0) : __assert_fail
 ("isLinkageValid()", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 3972, __PRETTY_FUNCTION__));
3973}

3975void 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;
}
3984}

3986void TagDecl::completeDefinition() {
assert((!isa<CXXRecordDecl>(this) ||(((!isa<CXXRecordDecl>(this) || cast<CXXRecordDecl>
(this)->hasDefinition()) && "definition completed but not started"
) ? static_cast<void> (0) : __assert_fail ("(!isa<CXXRecordDecl>(this) || cast<CXXRecordDecl>(this)->hasDefinition()) && \"definition completed but not started\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 3989, __PRETTY_FUNCTION__))
        cast<CXXRecordDecl>(this)->hasDefinition()) &&(((!isa<CXXRecordDecl>(this) || cast<CXXRecordDecl>
(this)->hasDefinition()) && "definition completed but not started"
) ? static_cast<void> (0) : __assert_fail ("(!isa<CXXRecordDecl>(this) || cast<CXXRecordDecl>(this)->hasDefinition()) && \"definition completed but not started\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 3989, __PRETTY_FUNCTION__))
       "definition completed but not started")(((!isa<CXXRecordDecl>(this) || cast<CXXRecordDecl>
(this)->hasDefinition()) && "definition completed but not started"
) ? static_cast<void> (0) : __assert_fail ("(!isa<CXXRecordDecl>(this) || cast<CXXRecordDecl>(this)->hasDefinition()) && \"definition completed but not started\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 3989, __PRETTY_FUNCTION__));

setCompleteDefinition(true);
setBeingDefined(false);

if (ASTMutationListener *L = getASTMutationListener())
  L->CompletedTagDefinition(this);
3996}

3998TagDecl *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;
4019}

4021void 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;
  }
}
4039}

4041void TagDecl::setTemplateParameterListsInfo(
  ASTContext &Context, ArrayRef<TemplateParameterList *> TPLists) {
assert(!TPLists.empty())((!TPLists.empty()) ? static_cast<void> (0) : __assert_fail
 ("!TPLists.empty()", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 4043, __PRETTY_FUNCTION__));
// 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);
4050}

4052//===----------------------------------------------------------------------===//
4053// EnumDecl Implementation
4054//===----------------------------------------------------------------------===//

4056EnumDecl::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)((Scoped || !ScopedUsingClassTag) ? static_cast<void> (
0) : __assert_fail ("Scoped || !ScopedUsingClassTag", "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 4060, __PRETTY_FUNCTION__));
IntegerType = nullptr;
setNumPositiveBits(0);
setNumNegativeBits(0);
setScoped(Scoped);
setScopedUsingClassTag(ScopedUsingClassTag);
setFixed(Fixed);
setHasODRHash(false);
ODRHash = 0;
4069}

4071void EnumDecl::anchor() {}

4073EnumDecl *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;
4083}

4085EnumDecl *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;
4091}

4093SourceRange EnumDecl::getIntegerTypeRange() const {
if (const TypeSourceInfo *TI = getIntegerTypeSourceInfo())
  return TI->getTypeLoc().getSourceRange();
return SourceRange();
4097}

4099void EnumDecl::completeDefinition(QualType NewType,
                                QualType NewPromotionType,
                                unsigned NumPositiveBits,
                                unsigned NumNegativeBits) {
assert(!isCompleteDefinition() && "Cannot redefine enums!")((!isCompleteDefinition() && "Cannot redefine enums!"
) ? static_cast<void> (0) : __assert_fail ("!isCompleteDefinition() && \"Cannot redefine enums!\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 4103, __PRETTY_FUNCTION__));
if (!IntegerType)
  IntegerType = NewType.getTypePtr();
PromotionType = NewPromotionType;
setNumPositiveBits(NumPositiveBits);
setNumNegativeBits(NumNegativeBits);
TagDecl::completeDefinition();
4110}

4112bool EnumDecl::isClosed() const {
if (const auto *A = getAttr<EnumExtensibilityAttr>())
  return A->getExtensibility() == EnumExtensibilityAttr::Closed;
return true;
4116}

4118bool EnumDecl::isClosedFlag() const {
return isClosed() && hasAttr<FlagEnumAttr>();
4120}

4122bool EnumDecl::isClosedNonFlag() const {
return isClosed() && !hasAttr<FlagEnumAttr>();
4124}

4126TemplateSpecializationKind EnumDecl::getTemplateSpecializationKind() const {
if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo())
  return MSI->getTemplateSpecializationKind();

return TSK_Undeclared;
4131}

4133void EnumDecl::setTemplateSpecializationKind(TemplateSpecializationKind TSK,
                                       SourceLocation PointOfInstantiation) {
MemberSpecializationInfo *MSI = getMemberSpecializationInfo();
assert(MSI && "Not an instantiated member enumeration?")((MSI && "Not an instantiated member enumeration?") ?
 static_cast<void> (0) : __assert_fail ("MSI && \"Not an instantiated member enumeration?\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 4136, __PRETTY_FUNCTION__));
MSI->setTemplateSpecializationKind(TSK);
if (TSK != TSK_ExplicitSpecialization &&
    PointOfInstantiation.isValid() &&
    MSI->getPointOfInstantiation().isInvalid())
  MSI->setPointOfInstantiation(PointOfInstantiation);
4142}

4144EnumDecl *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()) &&((!isTemplateInstantiation(getTemplateSpecializationKind()) &&
 "couldn't find pattern for enum instantiation") ? static_cast
<void> (0) : __assert_fail ("!isTemplateInstantiation(getTemplateSpecializationKind()) && \"couldn't find pattern for enum instantiation\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 4155, __PRETTY_FUNCTION__))
       "couldn't find pattern for enum instantiation")((!isTemplateInstantiation(getTemplateSpecializationKind()) &&
 "couldn't find pattern for enum instantiation") ? static_cast
<void> (0) : __assert_fail ("!isTemplateInstantiation(getTemplateSpecializationKind()) && \"couldn't find pattern for enum instantiation\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 4155, __PRETTY_FUNCTION__));
return nullptr;
4157}

4159EnumDecl *EnumDecl::getInstantiatedFromMemberEnum() const {
if (SpecializationInfo)
  return cast<EnumDecl>(SpecializationInfo->getInstantiatedFrom());

return nullptr;
4164}

4166void EnumDecl::setInstantiationOfMemberEnum(ASTContext &C, EnumDecl *ED,
                                          TemplateSpecializationKind TSK) {
assert(!SpecializationInfo && "Member enum is already a specialization")((!SpecializationInfo && "Member enum is already a specialization"
) ? static_cast<void> (0) : __assert_fail ("!SpecializationInfo && \"Member enum is already a specialization\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 4168, __PRETTY_FUNCTION__));
SpecializationInfo = new (C) MemberSpecializationInfo(ED, TSK);
4170}

4172unsigned EnumDecl::getODRHash() {
if (hasODRHash())
  return ODRHash;

class ODRHash Hash;
Hash.AddEnumDecl(this);
setHasODRHash(true);
ODRHash = Hash.CalculateHash();
return ODRHash;
4181}

4183//===----------------------------------------------------------------------===//
4184// RecordDecl Implementation
4185//===----------------------------------------------------------------------===//

4187RecordDecl::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!")((classof(static_cast<Decl *>(this)) && "Invalid Kind!"
) ? static_cast<void> (0) : __assert_fail ("classof(static_cast<Decl *>(this)) && \"Invalid Kind!\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 4192, __PRETTY_FUNCTION__));
setHasFlexibleArrayMember(false);
setAnonymousStructOrUnion(false);
setHasObjectMember(false);
setHasVolatileMember(false);
setHasLoadedFieldsFromExternalStorage(false);
setNonTrivialToPrimitiveDefaultInitialize(false);
setNonTrivialToPrimitiveCopy(false);
setNonTrivialToPrimitiveDestroy(false);
setParamDestroyedInCallee(false);
setArgPassingRestrictions(APK_CanPassInRegs);
4203}

4205RecordDecl *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;
4214}

4216RecordDecl *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;
4222}

4224bool RecordDecl::isInjectedClassName() const {
return isImplicit() && getDeclName() && getDeclContext()->isRecord() &&
  cast<RecordDecl>(getDeclContext())->getDeclName() == getDeclName();
4227}

4229bool RecordDecl::isLambda() const {
if (auto RD = dyn_cast<CXXRecordDecl>(this))
  return RD->isLambda();
return false;
4233}

4235bool RecordDecl::isCapturedRecord() const {
return hasAttr<CapturedRecordAttr>();
4237}

4239void RecordDecl::setCapturedRecord() {
addAttr(CapturedRecordAttr::CreateImplicit(getASTContext()));
4241}

4243RecordDecl::field_iterator RecordDecl::field_begin() const {
if (hasExternalLexicalStorage() && !hasLoadedFieldsFromExternalStorage())
  LoadFieldsFromExternalStorage();

return field_iterator(decl_iterator(FirstDecl));
4248}

4250/// completeDefinition - Notes that the definition of this type is now
4251/// complete.
4252void RecordDecl::completeDefinition() {
assert(!isCompleteDefinition() && "Cannot redefine record!")((!isCompleteDefinition() && "Cannot redefine record!"
) ? static_cast<void> (0) : __assert_fail ("!isCompleteDefinition() && \"Cannot redefine record!\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 4253, __PRETTY_FUNCTION__));
TagDecl::completeDefinition();
4255}

4257/// isMsStruct - Get whether or not this record uses ms_struct layout.
4258/// This which can be turned on with an attribute, pragma, or the
4259/// -mms-bitfields command-line option.
4260bool RecordDecl::isMsStruct(const ASTContext &C) const {
return hasAttr<MSStructAttr>() || C.getLangOpts().MSBitfields == 1;
4262}

4264void RecordDecl::LoadFieldsFromExternalStorage() const {
ExternalASTSource *Source = getASTContext().getExternalSource();
assert(hasExternalLexicalStorage() && Source && "No external storage?")((hasExternalLexicalStorage() && Source && "No external storage?"
) ? static_cast<void> (0) : __assert_fail ("hasExternalLexicalStorage() && Source && \"No external storage?\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 4266, __PRETTY_FUNCTION__));

// 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);

4277#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]))((isa<FieldDecl>(Decls[i]) || isa<IndirectFieldDecl>
(Decls[i])) ? static_cast<void> (0) : __assert_fail ("isa<FieldDecl>(Decls[i]) || isa<IndirectFieldDecl>(Decls[i])"
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 4280, __PRETTY_FUNCTION__));
4281#endif

if (Decls.empty())
  return;

std::tie(FirstDecl, LastDecl) = BuildDeclChain(Decls,
                                               /*FieldsAlreadyLoaded=*/false);
4288}

4290bool 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;
4333}

4335const 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;
4348}

4350//===----------------------------------------------------------------------===//
4351// BlockDecl Implementation
4352//===----------------------------------------------------------------------===//

4354BlockDecl::BlockDecl(DeclContext *DC, SourceLocation CaretLoc)
  : Decl(Block, DC, CaretLoc), DeclContext(Block) {
setIsVariadic(false);
setCapturesCXXThis(false);
setBlockMissingReturnType(true);
setIsConversionFromLambda(false);
setDoesNotEscape(false);
setCanAvoidCopyToHeap(false);
4362}

4364void BlockDecl::setParams(ArrayRef<ParmVarDecl *> NewParamInfo) {
assert(!ParamInfo && "Already has param info!")((!ParamInfo && "Already has param info!") ? static_cast
<void> (0) : __assert_fail ("!ParamInfo && \"Already has param info!\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 4365, __PRETTY_FUNCTION__));

// Zero params -> null pointer.
if (!NewParamInfo.empty()) {
  NumParams = NewParamInfo.size();
  ParamInfo = new (getASTContext()) ParmVarDecl*[NewParamInfo.size()];
  std::copy(NewParamInfo.begin(), NewParamInfo.end(), ParamInfo);
}
4373}

4375void 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();
4386}

4388bool 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;
4395}

4397SourceRange BlockDecl::getSourceRange() const {
return SourceRange(getLocation(), Body ? Body->getEndLoc() : getLocation());
4399}

4401//===----------------------------------------------------------------------===//
4402// Other Decl Allocation/Deallocation Method Implementations
4403//===----------------------------------------------------------------------===//

4405void TranslationUnitDecl::anchor() {}

4407TranslationUnitDecl *TranslationUnitDecl::Create(ASTContext &C) {
return new (C, (DeclContext *)nullptr) TranslationUnitDecl(C);
4409}

4411void PragmaCommentDecl::anchor() {}

4413PragmaCommentDecl *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;
4424}

4426PragmaCommentDecl *PragmaCommentDecl::CreateDeserialized(ASTContext &C,
                                                       unsigned ID,
                                                       unsigned ArgSize) {
return new (C, ID, additionalSizeToAlloc<char>(ArgSize + 1))
    PragmaCommentDecl(nullptr, SourceLocation(), PCK_Unknown);
4431}

4433void PragmaDetectMismatchDecl::anchor() {}

4435PragmaDetectMismatchDecl *
4436PragmaDetectMismatchDecl::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;
4449}

4451PragmaDetectMismatchDecl *
4452PragmaDetectMismatchDecl::CreateDeserialized(ASTContext &C, unsigned ID,
                                           unsigned NameValueSize) {
return new (C, ID, additionalSizeToAlloc<char>(NameValueSize + 1))
    PragmaDetectMismatchDecl(nullptr, SourceLocation(), 0);
4456}

4458void ExternCContextDecl::anchor() {}

4460ExternCContextDecl *ExternCContextDecl::Create(const ASTContext &C,
                                             TranslationUnitDecl *DC) {
return new (C, DC) ExternCContextDecl(DC);
4463}

4465void LabelDecl::anchor() {}

4467LabelDecl *LabelDecl::Create(ASTContext &C, DeclContext *DC,
                           SourceLocation IdentL, IdentifierInfo *II) {
return new (C, DC) LabelDecl(DC, IdentL, II, nullptr, IdentL);
4470}

4472LabelDecl *LabelDecl::Create(ASTContext &C, DeclContext *DC,
                           SourceLocation IdentL, IdentifierInfo *II,
                           SourceLocation GnuLabelL) {
assert(GnuLabelL != IdentL && "Use this only for GNU local labels")((GnuLabelL != IdentL && "Use this only for GNU local labels"
) ? static_cast<void> (0) : __assert_fail ("GnuLabelL != IdentL && \"Use this only for GNU local labels\""
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 4475, __PRETTY_FUNCTION__));
return new (C, DC) LabelDecl(DC, IdentL, II, nullptr, GnuLabelL);
4477}

4479LabelDecl *LabelDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID) LabelDecl(nullptr, SourceLocation(), nullptr, nullptr,
                             SourceLocation());
4482}

4484void LabelDecl::setMSAsmLabel(StringRef Name) {
char *Buffer = new (getASTContext(), 1) char[Name.size() + 1];
1
'Buffer' initialized to a null pointer value→
memcpy(Buffer, Name.data(), Name.size());
2
←
Null pointer passed as an argument to a 'nonnull' parameter
Buffer[Name.size()] = '\0';
MSAsmName = Buffer;
4489}

4491void ValueDecl::anchor() {}

4493bool ValueDecl::isWeak() const {
for (const auto *I : attrs())
  if (isa<WeakAttr>(I) || isa<WeakRefAttr>(I))
    return true;

return isWeakImported();
4499}

4501void ImplicitParamDecl::anchor() {}

4503ImplicitParamDecl *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);
4508}

4510ImplicitParamDecl *ImplicitParamDecl::Create(ASTContext &C, QualType Type,
                                           ImplicitParamKind ParamKind) {
return new (C, nullptr) ImplicitParamDecl(C, Type, ParamKind);
4513}

4515ImplicitParamDecl *ImplicitParamDecl::CreateDeserialized(ASTContext &C,
                                                       unsigned ID) {
return new (C, ID) ImplicitParamDecl(C, QualType(), ImplicitParamKind::Other);
4518}

4520FunctionDecl *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;
4533}

4535FunctionDecl *FunctionDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID) FunctionDecl(Function, C, nullptr, SourceLocation(),
                                DeclarationNameInfo(), QualType(), nullptr,
                                SC_None, false, false);
4539}

4541BlockDecl *BlockDecl::Create(ASTContext &C, DeclContext *DC, SourceLocation L) {
return new (C, DC) BlockDecl(DC, L);
4543}

4545BlockDecl *BlockDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID) BlockDecl(nullptr, SourceLocation());
4547}

4549CapturedDecl::CapturedDecl(DeclContext *DC, unsigned NumParams)
  : Decl(Captured, DC, SourceLocation()), DeclContext(Captured),
    NumParams(NumParams), ContextParam(0), BodyAndNothrow(nullptr, false) {}

4553CapturedDecl *CapturedDecl::Create(ASTContext &C, DeclContext *DC,
                                 unsigned NumParams) {
return new (C, DC, additionalSizeToAlloc<ImplicitParamDecl *>(NumParams))
    CapturedDecl(DC, NumParams);
4557}

4559CapturedDecl *CapturedDecl::CreateDeserialized(ASTContext &C, unsigned ID,
                                             unsigned NumParams) {
return new (C, ID, additionalSizeToAlloc<ImplicitParamDecl *>(NumParams))
    CapturedDecl(nullptr, NumParams);
4563}

4565Stmt *CapturedDecl::getBody() const { return BodyAndNothrow.getPointer(); }
4566void CapturedDecl::setBody(Stmt *B) { BodyAndNothrow.setPointer(B); }

4568bool CapturedDecl::isNothrow() const { return BodyAndNothrow.getInt(); }
4569void CapturedDecl::setNothrow(bool Nothrow) { BodyAndNothrow.setInt(Nothrow); }

4571EnumConstantDecl *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);
4576}

4578EnumConstantDecl *
4579EnumConstantDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID) EnumConstantDecl(nullptr, SourceLocation(), nullptr,
                                    QualType(), nullptr, llvm::APSInt());
4582}

4584void IndirectFieldDecl::anchor() {}

4586IndirectFieldDecl::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;
4596}

4598IndirectFieldDecl *
4599IndirectFieldDecl::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);
4603}

4605IndirectFieldDecl *IndirectFieldDecl::CreateDeserialized(ASTContext &C,
                                                       unsigned ID) {
return new (C, ID) IndirectFieldDecl(C, nullptr, SourceLocation(),
                                     DeclarationName(), QualType(), None);
4609}

4611SourceRange EnumConstantDecl::getSourceRange() const {
SourceLocation End = getLocation();
if (Init)
  End = Init->getEndLoc();
return SourceRange(getLocation(), End);
4616}

4618void TypeDecl::anchor() {}

4620TypedefDecl *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);
4624}

4626void TypedefNameDecl::anchor() {}

4628TagDecl *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;
4641}

4643bool 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;
4663}

4665TypedefDecl *TypedefDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID) TypedefDecl(C, nullptr, SourceLocation(), SourceLocation(),
                               nullptr, nullptr);
4668}

4670TypeAliasDecl *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);
4675}

4677TypeAliasDecl *TypeAliasDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID) TypeAliasDecl(C, nullptr, SourceLocation(),
                                 SourceLocation(), nullptr, nullptr);
4680}

4682SourceRange TypedefDecl::getSourceRange() const {
SourceLocation RangeEnd = getLocation();
if (TypeSourceInfo *TInfo = getTypeSourceInfo()) {
  if (typeIsPostfix(TInfo->getType()))
    RangeEnd = TInfo->getTypeLoc().getSourceRange().getEnd();
}
return SourceRange(getBeginLoc(), RangeEnd);
4689}

4691SourceRange TypeAliasDecl::getSourceRange() const {
SourceLocation RangeEnd = getBeginLoc();
if (TypeSourceInfo *TInfo = getTypeSourceInfo())
  RangeEnd = TInfo->getTypeLoc().getSourceRange().getEnd();
return SourceRange(getBeginLoc(), RangeEnd);
4696}

4698void FileScopeAsmDecl::anchor() {}

4700FileScopeAsmDecl *FileScopeAsmDecl::Create(ASTContext &C, DeclContext *DC,
                                         StringLiteral *Str,
                                         SourceLocation AsmLoc,
                                         SourceLocation RParenLoc) {
return new (C, DC) FileScopeAsmDecl(DC, Str, AsmLoc, RParenLoc);
4705}

4707FileScopeAsmDecl *FileScopeAsmDecl::CreateDeserialized(ASTContext &C,
                                                     unsigned ID) {
return new (C, ID) FileScopeAsmDecl(nullptr, nullptr, SourceLocation(),
                                    SourceLocation());
4711}

4713void EmptyDecl::anchor() {}

4715EmptyDecl *EmptyDecl::Create(ASTContext &C, DeclContext *DC, SourceLocation L) {
return new (C, DC) EmptyDecl(DC, L);
4717}

4719EmptyDecl *EmptyDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID) EmptyDecl(nullptr, SourceLocation());
4721}

4723//===----------------------------------------------------------------------===//
4724// ImportDecl Implementation
4725//===----------------------------------------------------------------------===//

4727/// Retrieve the number of module identifiers needed to name the given
4728/// module.
4729static unsigned getNumModuleIdentifiers(Module *Mod) {
unsigned Result = 1;
while (Mod->Parent) {
  Mod = Mod->Parent;
  ++Result;
}
return Result;
4736}

4738ImportDecl::ImportDecl(DeclContext *DC, SourceLocation StartLoc,
                     Module *Imported,
                     ArrayRef<SourceLocation> IdentifierLocs)
: Decl(Import, DC, StartLoc), ImportedAndComplete(Imported, true) {
assert(getNumModuleIdentifiers(Imported) == IdentifierLocs.size())((getNumModuleIdentifiers(Imported) == IdentifierLocs.size())
 ? static_cast<void> (0) : __assert_fail ("getNumModuleIdentifiers(Imported) == IdentifierLocs.size()"
, "/build/llvm-toolchain-snapshot-9~svn362543/tools/clang/lib/AST/Decl.cpp"
, 4742, __PRETTY_FUNCTION__));
auto *StoredLocs = getTrailingObjects<SourceLocation>();
std::uninitialized_copy(IdentifierLocs.begin(), IdentifierLocs.end(),
                        StoredLocs);
4746}

4748ImportDecl::ImportDecl(DeclContext *DC, SourceLocation StartLoc,
                     Module *Imported, SourceLocation EndLoc)
: Decl(Import, DC, StartLoc), ImportedAndComplete(Imported, false) {
*getTrailingObjects<SourceLocation>() = EndLoc;
4752}

4754ImportDecl *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);
4760}

4762ImportDecl *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;
4770}

4772ImportDecl *ImportDecl::CreateDeserialized(ASTContext &C, unsigned ID,
                                         unsigned NumLocations) {
return new (C, ID, additionalSizeToAlloc<SourceLocation>(NumLocations))
    ImportDecl(EmptyShell());
4776}

4778ArrayRef<SourceLocation> ImportDecl::getIdentifierLocs() const {
if (!ImportedAndComplete.getInt())
  return None;

const auto *StoredLocs = getTrailingObjects<SourceLocation>();
return llvm::makeArrayRef(StoredLocs,
                          getNumModuleIdentifiers(getImportedModule()));
4785}

4787SourceRange ImportDecl::getSourceRange() const {
if (!ImportedAndComplete.getInt())
  return SourceRange(getLocation(), *getTrailingObjects<SourceLocation>());

return SourceRange(getLocation(), getIdentifierLocs().back());
4792}

4794//===----------------------------------------------------------------------===//
4795// ExportDecl Implementation
4796//===----------------------------------------------------------------------===//

4798void ExportDecl::anchor() {}

4800ExportDecl *ExportDecl::Create(ASTContext &C, DeclContext *DC,
                             SourceLocation ExportLoc) {
return new (C, DC) ExportDecl(DC, ExportLoc);
4803}

4805ExportDecl *ExportDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
return new (C, ID) ExportDecl(nullptr, SourceLocation());
4807}