Bug Summary

File:tools/clang/lib/AST/Decl.cpp
Warning:line 4401, 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-8/lib/clang/8.0.0 -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-8~svn350071/build-llvm/tools/clang/lib/AST -I /build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/AST -I /build/llvm-toolchain-snapshot-8~svn350071/tools/clang/include -I /build/llvm-toolchain-snapshot-8~svn350071/build-llvm/tools/clang/include -I /build/llvm-toolchain-snapshot-8~svn350071/build-llvm/include -I /build/llvm-toolchain-snapshot-8~svn350071/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/8.0.0/include/ -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-8/lib/clang/8.0.0/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-8~svn350071/build-llvm/tools/clang/lib/AST -fdebug-prefix-map=/build/llvm-toolchain-snapshot-8~svn350071=. -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-2018-12-27-042839-1215-1 -x c++ /build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/AST/Decl.cpp -faddrsig
1//===- Decl.cpp - Declaration AST Node Implementation ---------------------===//
2//
3// The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file implements the Decl subclasses.
11//
12//===----------------------------------------------------------------------===//
13
14#include "clang/AST/Decl.h"
15#include "Linkage.h"
16#include "clang/AST/ASTContext.h"
17#include "clang/AST/ASTDiagnostic.h"
18#include "clang/AST/ASTLambda.h"
19#include "clang/AST/ASTMutationListener.h"
20#include "clang/AST/CanonicalType.h"
21#include "clang/AST/DeclBase.h"
22#include "clang/AST/DeclCXX.h"
23#include "clang/AST/DeclObjC.h"
24#include "clang/AST/DeclOpenMP.h"
25#include "clang/AST/DeclTemplate.h"
26#include "clang/AST/DeclarationName.h"
27#include "clang/AST/Expr.h"
28#include "clang/AST/ExprCXX.h"
29#include "clang/AST/ExternalASTSource.h"
30#include "clang/AST/ODRHash.h"
31#include "clang/AST/PrettyDeclStackTrace.h"
32#include "clang/AST/PrettyPrinter.h"
33#include "clang/AST/Redeclarable.h"
34#include "clang/AST/Stmt.h"
35#include "clang/AST/TemplateBase.h"
36#include "clang/AST/Type.h"
37#include "clang/AST/TypeLoc.h"
38#include "clang/Basic/Builtins.h"
39#include "clang/Basic/IdentifierTable.h"
40#include "clang/Basic/LLVM.h"
41#include "clang/Basic/LangOptions.h"
42#include "clang/Basic/Linkage.h"
43#include "clang/Basic/Module.h"
44#include "clang/Basic/PartialDiagnostic.h"
45#include "clang/Basic/SanitizerBlacklist.h"
46#include "clang/Basic/Sanitizers.h"
47#include "clang/Basic/SourceLocation.h"
48#include "clang/Basic/SourceManager.h"
49#include "clang/Basic/Specifiers.h"
50#include "clang/Basic/TargetCXXABI.h"
51#include "clang/Basic/TargetInfo.h"
52#include "clang/Basic/Visibility.h"
53#include "llvm/ADT/APSInt.h"
54#include "llvm/ADT/ArrayRef.h"
55#include "llvm/ADT/None.h"
56#include "llvm/ADT/Optional.h"
57#include "llvm/ADT/STLExtras.h"
58#include "llvm/ADT/SmallVector.h"
59#include "llvm/ADT/StringSwitch.h"
60#include "llvm/ADT/StringRef.h"
61#include "llvm/ADT/Triple.h"
62#include "llvm/Support/Casting.h"
63#include "llvm/Support/ErrorHandling.h"
64#include "llvm/Support/raw_ostream.h"
65#include <algorithm>
66#include <cassert>
67#include <cstddef>
68#include <cstring>
69#include <memory>
70#include <string>
71#include <tuple>
72#include <type_traits>
73
74using namespace clang;
75
76Decl *clang::getPrimaryMergedDecl(Decl *D) {
77 return D->getASTContext().getPrimaryMergedDecl(D);
78}
79
80void PrettyDeclStackTraceEntry::print(raw_ostream &OS) const {
81 SourceLocation Loc = this->Loc;
82 if (!Loc.isValid() && TheDecl) Loc = TheDecl->getLocation();
83 if (Loc.isValid()) {
84 Loc.print(OS, Context.getSourceManager());
85 OS << ": ";
86 }
87 OS << Message;
88
89 if (auto *ND = dyn_cast_or_null<NamedDecl>(TheDecl)) {
90 OS << " '";
91 ND->getNameForDiagnostic(OS, Context.getPrintingPolicy(), true);
92 OS << "'";
93 }
94
95 OS << '\n';
96}
97
98// Defined here so that it can be inlined into its direct callers.
99bool Decl::isOutOfLine() const {
100 return !getLexicalDeclContext()->Equals(getDeclContext());
101}
102
103TranslationUnitDecl::TranslationUnitDecl(ASTContext &ctx)
104 : Decl(TranslationUnit, nullptr, SourceLocation()),
105 DeclContext(TranslationUnit), Ctx(ctx) {}
106
107//===----------------------------------------------------------------------===//
108// NamedDecl Implementation
109//===----------------------------------------------------------------------===//
110
111// Visibility rules aren't rigorously externally specified, but here
112// are the basic principles behind what we implement:
113//
114// 1. An explicit visibility attribute is generally a direct expression
115// of the user's intent and should be honored. Only the innermost
116// visibility attribute applies. If no visibility attribute applies,
117// global visibility settings are considered.
118//
119// 2. There is one caveat to the above: on or in a template pattern,
120// an explicit visibility attribute is just a default rule, and
121// visibility can be decreased by the visibility of template
122// arguments. But this, too, has an exception: an attribute on an
123// explicit specialization or instantiation causes all the visibility
124// restrictions of the template arguments to be ignored.
125//
126// 3. A variable that does not otherwise have explicit visibility can
127// be restricted by the visibility of its type.
128//
129// 4. A visibility restriction is explicit if it comes from an
130// attribute (or something like it), not a global visibility setting.
131// When emitting a reference to an external symbol, visibility
132// restrictions are ignored unless they are explicit.
133//
134// 5. When computing the visibility of a non-type, including a
135// non-type member of a class, only non-type visibility restrictions
136// are considered: the 'visibility' attribute, global value-visibility
137// settings, and a few special cases like __private_extern.
138//
139// 6. When computing the visibility of a type, including a type member
140// of a class, only type visibility restrictions are considered:
141// the 'type_visibility' attribute and global type-visibility settings.
142// However, a 'visibility' attribute counts as a 'type_visibility'
143// attribute on any declaration that only has the former.
144//
145// The visibility of a "secondary" entity, like a template argument,
146// is computed using the kind of that entity, not the kind of the
147// primary entity for which we are computing visibility. For example,
148// the visibility of a specialization of either of these templates:
149// template <class T, bool (&compare)(T, X)> bool has_match(list<T>, X);
150// template <class T, bool (&compare)(T, X)> class matcher;
151// is restricted according to the type visibility of the argument 'T',
152// the type visibility of 'bool(&)(T,X)', and the value visibility of
153// the argument function 'compare'. That 'has_match' is a value
154// and 'matcher' is a type only matters when looking for attributes
155// and settings from the immediate context.
156
157/// Does this computation kind permit us to consider additional
158/// visibility settings from attributes and the like?
159static bool hasExplicitVisibilityAlready(LVComputationKind computation) {
160 return computation.IgnoreExplicitVisibility;
161}
162
163/// Given an LVComputationKind, return one of the same type/value sort
164/// that records that it already has explicit visibility.
165static LVComputationKind
166withExplicitVisibilityAlready(LVComputationKind Kind) {
167 Kind.IgnoreExplicitVisibility = true;
168 return Kind;
169}
170
171static Optional<Visibility> getExplicitVisibility(const NamedDecl *D,
172 LVComputationKind kind) {
173 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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 174, __PRETTY_FUNCTION__))
174 "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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 174, __PRETTY_FUNCTION__))
;
175 return D->getExplicitVisibility(kind.getExplicitVisibilityKind());
176}
177
178/// Is the given declaration a "type" or a "value" for the purposes of
179/// visibility computation?
180static bool usesTypeVisibility(const NamedDecl *D) {
181 return isa<TypeDecl>(D) ||
182 isa<ClassTemplateDecl>(D) ||
183 isa<ObjCInterfaceDecl>(D);
184}
185
186/// Does the given declaration have member specialization information,
187/// and if so, is it an explicit specialization?
188template <class T> static typename
189std::enable_if<!std::is_base_of<RedeclarableTemplateDecl, T>::value, bool>::type
190isExplicitMemberSpecialization(const T *D) {
191 if (const MemberSpecializationInfo *member =
192 D->getMemberSpecializationInfo()) {
193 return member->isExplicitSpecialization();
194 }
195 return false;
196}
197
198/// For templates, this question is easier: a member template can't be
199/// explicitly instantiated, so there's a single bit indicating whether
200/// or not this is an explicit member specialization.
201static bool isExplicitMemberSpecialization(const RedeclarableTemplateDecl *D) {
202 return D->isMemberSpecialization();
203}
204
205/// Given a visibility attribute, return the explicit visibility
206/// associated with it.
207template <class T>
208static Visibility getVisibilityFromAttr(const T *attr) {
209 switch (attr->getVisibility()) {
210 case T::Default:
211 return DefaultVisibility;
212 case T::Hidden:
213 return HiddenVisibility;
214 case T::Protected:
215 return ProtectedVisibility;
216 }
217 llvm_unreachable("bad visibility kind")::llvm::llvm_unreachable_internal("bad visibility kind", "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 217)
;
218}
219
220/// Return the explicit visibility of the given declaration.
221static Optional<Visibility> getVisibilityOf(const NamedDecl *D,
222 NamedDecl::ExplicitVisibilityKind kind) {
223 // If we're ultimately computing the visibility of a type, look for
224 // a 'type_visibility' attribute before looking for 'visibility'.
225 if (kind == NamedDecl::VisibilityForType) {
226 if (const auto *A = D->getAttr<TypeVisibilityAttr>()) {
227 return getVisibilityFromAttr(A);
228 }
229 }
230
231 // If this declaration has an explicit visibility attribute, use it.
232 if (const auto *A = D->getAttr<VisibilityAttr>()) {
233 return getVisibilityFromAttr(A);
234 }
235
236 return None;
237}
238
239LinkageInfo LinkageComputer::getLVForType(const Type &T,
240 LVComputationKind computation) {
241 if (computation.IgnoreAllVisibility)
242 return LinkageInfo(T.getLinkage(), DefaultVisibility, true);
243 return getTypeLinkageAndVisibility(&T);
244}
245
246/// Get the most restrictive linkage for the types in the given
247/// template parameter list. For visibility purposes, template
248/// parameters are part of the signature of a template.
249LinkageInfo LinkageComputer::getLVForTemplateParameterList(
250 const TemplateParameterList *Params, LVComputationKind computation) {
251 LinkageInfo LV;
252 for (const NamedDecl *P : *Params) {
253 // Template type parameters are the most common and never
254 // contribute to visibility, pack or not.
255 if (isa<TemplateTypeParmDecl>(P))
256 continue;
257
258 // Non-type template parameters can be restricted by the value type, e.g.
259 // template <enum X> class A { ... };
260 // We have to be careful here, though, because we can be dealing with
261 // dependent types.
262 if (const auto *NTTP = dyn_cast<NonTypeTemplateParmDecl>(P)) {
263 // Handle the non-pack case first.
264 if (!NTTP->isExpandedParameterPack()) {
265 if (!NTTP->getType()->isDependentType()) {
266 LV.merge(getLVForType(*NTTP->getType(), computation));
267 }
268 continue;
269 }
270
271 // Look at all the types in an expanded pack.
272 for (unsigned i = 0, n = NTTP->getNumExpansionTypes(); i != n; ++i) {
273 QualType type = NTTP->getExpansionType(i);
274 if (!type->isDependentType())
275 LV.merge(getTypeLinkageAndVisibility(type));
276 }
277 continue;
278 }
279
280 // Template template parameters can be restricted by their
281 // template parameters, recursively.
282 const auto *TTP = cast<TemplateTemplateParmDecl>(P);
283
284 // Handle the non-pack case first.
285 if (!TTP->isExpandedParameterPack()) {
286 LV.merge(getLVForTemplateParameterList(TTP->getTemplateParameters(),
287 computation));
288 continue;
289 }
290
291 // Look at all expansions in an expanded pack.
292 for (unsigned i = 0, n = TTP->getNumExpansionTemplateParameters();
293 i != n; ++i) {
294 LV.merge(getLVForTemplateParameterList(
295 TTP->getExpansionTemplateParameters(i), computation));
296 }
297 }
298
299 return LV;
300}
301
302static const Decl *getOutermostFuncOrBlockContext(const Decl *D) {
303 const Decl *Ret = nullptr;
304 const DeclContext *DC = D->getDeclContext();
305 while (DC->getDeclKind() != Decl::TranslationUnit) {
306 if (isa<FunctionDecl>(DC) || isa<BlockDecl>(DC))
307 Ret = cast<Decl>(DC);
308 DC = DC->getParent();
309 }
310 return Ret;
311}
312
313/// Get the most restrictive linkage for the types and
314/// declarations in the given template argument list.
315///
316/// Note that we don't take an LVComputationKind because we always
317/// want to honor the visibility of template arguments in the same way.
318LinkageInfo
319LinkageComputer::getLVForTemplateArgumentList(ArrayRef<TemplateArgument> Args,
320 LVComputationKind computation) {
321 LinkageInfo LV;
322
323 for (const TemplateArgument &Arg : Args) {
324 switch (Arg.getKind()) {
325 case TemplateArgument::Null:
326 case TemplateArgument::Integral:
327 case TemplateArgument::Expression:
328 continue;
329
330 case TemplateArgument::Type:
331 LV.merge(getLVForType(*Arg.getAsType(), computation));
332 continue;
333
334 case TemplateArgument::Declaration: {
335 const NamedDecl *ND = Arg.getAsDecl();
336 assert(!usesTypeVisibility(ND))((!usesTypeVisibility(ND)) ? static_cast<void> (0) : __assert_fail
("!usesTypeVisibility(ND)", "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 336, __PRETTY_FUNCTION__))
;
337 LV.merge(getLVForDecl(ND, computation));
338 continue;
339 }
340
341 case TemplateArgument::NullPtr:
342 LV.merge(getTypeLinkageAndVisibility(Arg.getNullPtrType()));
343 continue;
344
345 case TemplateArgument::Template:
346 case TemplateArgument::TemplateExpansion:
347 if (TemplateDecl *Template =
348 Arg.getAsTemplateOrTemplatePattern().getAsTemplateDecl())
349 LV.merge(getLVForDecl(Template, computation));
350 continue;
351
352 case TemplateArgument::Pack:
353 LV.merge(getLVForTemplateArgumentList(Arg.getPackAsArray(), computation));
354 continue;
355 }
356 llvm_unreachable("bad template argument kind")::llvm::llvm_unreachable_internal("bad template argument kind"
, "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 356)
;
357 }
358
359 return LV;
360}
361
362LinkageInfo
363LinkageComputer::getLVForTemplateArgumentList(const TemplateArgumentList &TArgs,
364 LVComputationKind computation) {
365 return getLVForTemplateArgumentList(TArgs.asArray(), computation);
366}
367
368static bool shouldConsiderTemplateVisibility(const FunctionDecl *fn,
369 const FunctionTemplateSpecializationInfo *specInfo) {
370 // Include visibility from the template parameters and arguments
371 // only if this is not an explicit instantiation or specialization
372 // with direct explicit visibility. (Implicit instantiations won't
373 // have a direct attribute.)
374 if (!specInfo->isExplicitInstantiationOrSpecialization())
375 return true;
376
377 return !fn->hasAttr<VisibilityAttr>();
378}
379
380/// Merge in template-related linkage and visibility for the given
381/// function template specialization.
382///
383/// We don't need a computation kind here because we can assume
384/// LVForValue.
385///
386/// \param[out] LV the computation to use for the parent
387void LinkageComputer::mergeTemplateLV(
388 LinkageInfo &LV, const FunctionDecl *fn,
389 const FunctionTemplateSpecializationInfo *specInfo,
390 LVComputationKind computation) {
391 bool considerVisibility =
392 shouldConsiderTemplateVisibility(fn, specInfo);
393
394 // Merge information from the template parameters.
395 FunctionTemplateDecl *temp = specInfo->getTemplate();
396 LinkageInfo tempLV =
397 getLVForTemplateParameterList(temp->getTemplateParameters(), computation);
398 LV.mergeMaybeWithVisibility(tempLV, considerVisibility);
399
400 // Merge information from the template arguments.
401 const TemplateArgumentList &templateArgs = *specInfo->TemplateArguments;
402 LinkageInfo argsLV = getLVForTemplateArgumentList(templateArgs, computation);
403 LV.mergeMaybeWithVisibility(argsLV, considerVisibility);
404}
405
406/// Does the given declaration have a direct visibility attribute
407/// that would match the given rules?
408static bool hasDirectVisibilityAttribute(const NamedDecl *D,
409 LVComputationKind computation) {
410 if (computation.IgnoreAllVisibility)
411 return false;
412
413 return (computation.isTypeVisibility() && D->hasAttr<TypeVisibilityAttr>()) ||
414 D->hasAttr<VisibilityAttr>();
415}
416
417/// Should we consider visibility associated with the template
418/// arguments and parameters of the given class template specialization?
419static bool shouldConsiderTemplateVisibility(
420 const ClassTemplateSpecializationDecl *spec,
421 LVComputationKind computation) {
422 // Include visibility from the template parameters and arguments
423 // only if this is not an explicit instantiation or specialization
424 // with direct explicit visibility (and note that implicit
425 // instantiations won't have a direct attribute).
426 //
427 // Furthermore, we want to ignore template parameters and arguments
428 // for an explicit specialization when computing the visibility of a
429 // member thereof with explicit visibility.
430 //
431 // This is a bit complex; let's unpack it.
432 //
433 // An explicit class specialization is an independent, top-level
434 // declaration. As such, if it or any of its members has an
435 // explicit visibility attribute, that must directly express the
436 // user's intent, and we should honor it. The same logic applies to
437 // an explicit instantiation of a member of such a thing.
438
439 // Fast path: if this is not an explicit instantiation or
440 // specialization, we always want to consider template-related
441 // visibility restrictions.
442 if (!spec->isExplicitInstantiationOrSpecialization())
443 return true;
444
445 // This is the 'member thereof' check.
446 if (spec->isExplicitSpecialization() &&
447 hasExplicitVisibilityAlready(computation))
448 return false;
449
450 return !hasDirectVisibilityAttribute(spec, computation);
451}
452
453/// Merge in template-related linkage and visibility for the given
454/// class template specialization.
455void LinkageComputer::mergeTemplateLV(
456 LinkageInfo &LV, const ClassTemplateSpecializationDecl *spec,
457 LVComputationKind computation) {
458 bool considerVisibility = shouldConsiderTemplateVisibility(spec, computation);
459
460 // Merge information from the template parameters, but ignore
461 // visibility if we're only considering template arguments.
462
463 ClassTemplateDecl *temp = spec->getSpecializedTemplate();
464 LinkageInfo tempLV =
465 getLVForTemplateParameterList(temp->getTemplateParameters(), computation);
466 LV.mergeMaybeWithVisibility(tempLV,
467 considerVisibility && !hasExplicitVisibilityAlready(computation));
468
469 // Merge information from the template arguments. We ignore
470 // template-argument visibility if we've got an explicit
471 // instantiation with a visibility attribute.
472 const TemplateArgumentList &templateArgs = spec->getTemplateArgs();
473 LinkageInfo argsLV = getLVForTemplateArgumentList(templateArgs, computation);
474 if (considerVisibility)
475 LV.mergeVisibility(argsLV);
476 LV.mergeExternalVisibility(argsLV);
477}
478
479/// Should we consider visibility associated with the template
480/// arguments and parameters of the given variable template
481/// specialization? As usual, follow class template specialization
482/// logic up to initialization.
483static bool shouldConsiderTemplateVisibility(
484 const VarTemplateSpecializationDecl *spec,
485 LVComputationKind computation) {
486 // Include visibility from the template parameters and arguments
487 // only if this is not an explicit instantiation or specialization
488 // with direct explicit visibility (and note that implicit
489 // instantiations won't have a direct attribute).
490 if (!spec->isExplicitInstantiationOrSpecialization())
491 return true;
492
493 // An explicit variable specialization is an independent, top-level
494 // declaration. As such, if it has an explicit visibility attribute,
495 // that must directly express the user's intent, and we should honor
496 // it.
497 if (spec->isExplicitSpecialization() &&
498 hasExplicitVisibilityAlready(computation))
499 return false;
500
501 return !hasDirectVisibilityAttribute(spec, computation);
502}
503
504/// Merge in template-related linkage and visibility for the given
505/// variable template specialization. As usual, follow class template
506/// specialization logic up to initialization.
507void LinkageComputer::mergeTemplateLV(LinkageInfo &LV,
508 const VarTemplateSpecializationDecl *spec,
509 LVComputationKind computation) {
510 bool considerVisibility = shouldConsiderTemplateVisibility(spec, computation);
511
512 // Merge information from the template parameters, but ignore
513 // visibility if we're only considering template arguments.
514
515 VarTemplateDecl *temp = spec->getSpecializedTemplate();
516 LinkageInfo tempLV =
517 getLVForTemplateParameterList(temp->getTemplateParameters(), computation);
518 LV.mergeMaybeWithVisibility(tempLV,
519 considerVisibility && !hasExplicitVisibilityAlready(computation));
520
521 // Merge information from the template arguments. We ignore
522 // template-argument visibility if we've got an explicit
523 // instantiation with a visibility attribute.
524 const TemplateArgumentList &templateArgs = spec->getTemplateArgs();
525 LinkageInfo argsLV = getLVForTemplateArgumentList(templateArgs, computation);
526 if (considerVisibility)
527 LV.mergeVisibility(argsLV);
528 LV.mergeExternalVisibility(argsLV);
529}
530
531static bool useInlineVisibilityHidden(const NamedDecl *D) {
532 // FIXME: we should warn if -fvisibility-inlines-hidden is used with c.
533 const LangOptions &Opts = D->getASTContext().getLangOpts();
534 if (!Opts.CPlusPlus || !Opts.InlineVisibilityHidden)
535 return false;
536
537 const auto *FD = dyn_cast<FunctionDecl>(D);
538 if (!FD)
539 return false;
540
541 TemplateSpecializationKind TSK = TSK_Undeclared;
542 if (FunctionTemplateSpecializationInfo *spec
543 = FD->getTemplateSpecializationInfo()) {
544 TSK = spec->getTemplateSpecializationKind();
545 } else if (MemberSpecializationInfo *MSI =
546 FD->getMemberSpecializationInfo()) {
547 TSK = MSI->getTemplateSpecializationKind();
548 }
549
550 const FunctionDecl *Def = nullptr;
551 // InlineVisibilityHidden only applies to definitions, and
552 // isInlined() only gives meaningful answers on definitions
553 // anyway.
554 return TSK != TSK_ExplicitInstantiationDeclaration &&
555 TSK != TSK_ExplicitInstantiationDefinition &&
556 FD->hasBody(Def) && Def->isInlined() && !Def->hasAttr<GNUInlineAttr>();
557}
558
559template <typename T> static bool isFirstInExternCContext(T *D) {
560 const T *First = D->getFirstDecl();
561 return First->isInExternCContext();
562}
563
564static bool isSingleLineLanguageLinkage(const Decl &D) {
565 if (const auto *SD = dyn_cast<LinkageSpecDecl>(D.getDeclContext()))
566 if (!SD->hasBraces())
567 return true;
568 return false;
569}
570
571static bool isExportedFromModuleIntefaceUnit(const NamedDecl *D) {
572 // FIXME: Handle isModulePrivate.
573 switch (D->getModuleOwnershipKind()) {
574 case Decl::ModuleOwnershipKind::Unowned:
575 case Decl::ModuleOwnershipKind::ModulePrivate:
576 return false;
577 case Decl::ModuleOwnershipKind::Visible:
578 case Decl::ModuleOwnershipKind::VisibleWhenImported:
579 if (auto *M = D->getOwningModule())
580 return M->Kind == Module::ModuleInterfaceUnit;
581 }
582 llvm_unreachable("unexpected module ownership kind")::llvm::llvm_unreachable_internal("unexpected module ownership kind"
, "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 582)
;
583}
584
585static LinkageInfo getInternalLinkageFor(const NamedDecl *D) {
586 // Internal linkage declarations within a module interface unit are modeled
587 // as "module-internal linkage", which means that they have internal linkage
588 // formally but can be indirectly accessed from outside the module via inline
589 // functions and templates defined within the module.
590 if (auto *M = D->getOwningModule())
591 if (M->Kind == Module::ModuleInterfaceUnit)
592 return LinkageInfo(ModuleInternalLinkage, DefaultVisibility, false);
593
594 return LinkageInfo::internal();
595}
596
597static LinkageInfo getExternalLinkageFor(const NamedDecl *D) {
598 // C++ Modules TS [basic.link]/6.8:
599 // - A name declared at namespace scope that does not have internal linkage
600 // by the previous rules and that is introduced by a non-exported
601 // declaration has module linkage.
602 if (auto *M = D->getOwningModule())
603 if (M->Kind == Module::ModuleInterfaceUnit)
604 if (!isExportedFromModuleIntefaceUnit(
605 cast<NamedDecl>(D->getCanonicalDecl())))
606 return LinkageInfo(ModuleLinkage, DefaultVisibility, false);
607
608 return LinkageInfo::external();
609}
610
611LinkageInfo
612LinkageComputer::getLVForNamespaceScopeDecl(const NamedDecl *D,
613 LVComputationKind computation,
614 bool IgnoreVarTypeLinkage) {
615 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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 616, __PRETTY_FUNCTION__))
616 "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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 616, __PRETTY_FUNCTION__))
;
617 ASTContext &Context = D->getASTContext();
618
619 // C++ [basic.link]p3:
620 // A name having namespace scope (3.3.6) has internal linkage if it
621 // is the name of
622 // - an object, reference, function or function template that is
623 // explicitly declared static; or,
624 // (This bullet corresponds to C99 6.2.2p3.)
625 if (const auto *Var = dyn_cast<VarDecl>(D)) {
626 // Explicitly declared static.
627 if (Var->getStorageClass() == SC_Static)
628 return getInternalLinkageFor(Var);
629
630 // - a non-inline, non-volatile object or reference that is explicitly
631 // declared const or constexpr and neither explicitly declared extern
632 // nor previously declared to have external linkage; or (there is no
633 // equivalent in C99)
634 // The C++ modules TS adds "non-exported" to this list.
635 if (Context.getLangOpts().CPlusPlus &&
636 Var->getType().isConstQualified() &&
637 !Var->getType().isVolatileQualified() &&
638 !Var->isInline() &&
639 !isExportedFromModuleIntefaceUnit(Var)) {
640 const VarDecl *PrevVar = Var->getPreviousDecl();
641 if (PrevVar)
642 return getLVForDecl(PrevVar, computation);
643
644 if (Var->getStorageClass() != SC_Extern &&
645 Var->getStorageClass() != SC_PrivateExtern &&
646 !isSingleLineLanguageLinkage(*Var))
647 return getInternalLinkageFor(Var);
648 }
649
650 for (const VarDecl *PrevVar = Var->getPreviousDecl(); PrevVar;
651 PrevVar = PrevVar->getPreviousDecl()) {
652 if (PrevVar->getStorageClass() == SC_PrivateExtern &&
653 Var->getStorageClass() == SC_None)
654 return getDeclLinkageAndVisibility(PrevVar);
655 // Explicitly declared static.
656 if (PrevVar->getStorageClass() == SC_Static)
657 return getInternalLinkageFor(Var);
658 }
659 } else if (const FunctionDecl *Function = D->getAsFunction()) {
660 // C++ [temp]p4:
661 // A non-member function template can have internal linkage; any
662 // other template name shall have external linkage.
663
664 // Explicitly declared static.
665 if (Function->getCanonicalDecl()->getStorageClass() == SC_Static)
666 return getInternalLinkageFor(Function);
667 } else if (const auto *IFD = dyn_cast<IndirectFieldDecl>(D)) {
668 // - a data member of an anonymous union.
669 const VarDecl *VD = IFD->getVarDecl();
670 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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 670, __PRETTY_FUNCTION__))
;
671 return getLVForNamespaceScopeDecl(VD, computation, IgnoreVarTypeLinkage);
672 }
673 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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 673, __PRETTY_FUNCTION__))
;
674
675 if (D->isInAnonymousNamespace()) {
676 const auto *Var = dyn_cast<VarDecl>(D);
677 const auto *Func = dyn_cast<FunctionDecl>(D);
678 // FIXME: The check for extern "C" here is not justified by the standard
679 // wording, but we retain it from the pre-DR1113 model to avoid breaking
680 // code.
681 //
682 // C++11 [basic.link]p4:
683 // An unnamed namespace or a namespace declared directly or indirectly
684 // within an unnamed namespace has internal linkage.
685 if ((!Var || !isFirstInExternCContext(Var)) &&
686 (!Func || !isFirstInExternCContext(Func)))
687 return getInternalLinkageFor(D);
688 }
689
690 // Set up the defaults.
691
692 // C99 6.2.2p5:
693 // If the declaration of an identifier for an object has file
694 // scope and no storage-class specifier, its linkage is
695 // external.
696 LinkageInfo LV = getExternalLinkageFor(D);
697
698 if (!hasExplicitVisibilityAlready(computation)) {
699 if (Optional<Visibility> Vis = getExplicitVisibility(D, computation)) {
700 LV.mergeVisibility(*Vis, true);
701 } else {
702 // If we're declared in a namespace with a visibility attribute,
703 // use that namespace's visibility, and it still counts as explicit.
704 for (const DeclContext *DC = D->getDeclContext();
705 !isa<TranslationUnitDecl>(DC);
706 DC = DC->getParent()) {
707 const auto *ND = dyn_cast<NamespaceDecl>(DC);
708 if (!ND) continue;
709 if (Optional<Visibility> Vis = getExplicitVisibility(ND, computation)) {
710 LV.mergeVisibility(*Vis, true);
711 break;
712 }
713 }
714 }
715
716 // Add in global settings if the above didn't give us direct visibility.
717 if (!LV.isVisibilityExplicit()) {
718 // Use global type/value visibility as appropriate.
719 Visibility globalVisibility =
720 computation.isValueVisibility()
721 ? Context.getLangOpts().getValueVisibilityMode()
722 : Context.getLangOpts().getTypeVisibilityMode();
723 LV.mergeVisibility(globalVisibility, /*explicit*/ false);
724
725 // If we're paying attention to global visibility, apply
726 // -finline-visibility-hidden if this is an inline method.
727 if (useInlineVisibilityHidden(D))
728 LV.mergeVisibility(HiddenVisibility, /*visibilityExplicit=*/false);
729 }
730 }
731
732 // C++ [basic.link]p4:
733
734 // A name having namespace scope has external linkage if it is the
735 // name of
736 //
737 // - an object or reference, unless it has internal linkage; or
738 if (const auto *Var = dyn_cast<VarDecl>(D)) {
739 // GCC applies the following optimization to variables and static
740 // data members, but not to functions:
741 //
742 // Modify the variable's LV by the LV of its type unless this is
743 // C or extern "C". This follows from [basic.link]p9:
744 // A type without linkage shall not be used as the type of a
745 // variable or function with external linkage unless
746 // - the entity has C language linkage, or
747 // - the entity is declared within an unnamed namespace, or
748 // - the entity is not used or is defined in the same
749 // translation unit.
750 // and [basic.link]p10:
751 // ...the types specified by all declarations referring to a
752 // given variable or function shall be identical...
753 // C does not have an equivalent rule.
754 //
755 // Ignore this if we've got an explicit attribute; the user
756 // probably knows what they're doing.
757 //
758 // Note that we don't want to make the variable non-external
759 // because of this, but unique-external linkage suits us.
760 if (Context.getLangOpts().CPlusPlus && !isFirstInExternCContext(Var) &&
761 !IgnoreVarTypeLinkage) {
762 LinkageInfo TypeLV = getLVForType(*Var->getType(), computation);
763 if (!isExternallyVisible(TypeLV.getLinkage()))
764 return LinkageInfo::uniqueExternal();
765 if (!LV.isVisibilityExplicit())
766 LV.mergeVisibility(TypeLV);
767 }
768
769 if (Var->getStorageClass() == SC_PrivateExtern)
770 LV.mergeVisibility(HiddenVisibility, true);
771
772 // Note that Sema::MergeVarDecl already takes care of implementing
773 // C99 6.2.2p4 and propagating the visibility attribute, so we don't have
774 // to do it here.
775
776 // As per function and class template specializations (below),
777 // consider LV for the template and template arguments. We're at file
778 // scope, so we do not need to worry about nested specializations.
779 if (const auto *spec = dyn_cast<VarTemplateSpecializationDecl>(Var)) {
780 mergeTemplateLV(LV, spec, computation);
781 }
782
783 // - a function, unless it has internal linkage; or
784 } else if (const auto *Function = dyn_cast<FunctionDecl>(D)) {
785 // In theory, we can modify the function's LV by the LV of its
786 // type unless it has C linkage (see comment above about variables
787 // for justification). In practice, GCC doesn't do this, so it's
788 // just too painful to make work.
789
790 if (Function->getStorageClass() == SC_PrivateExtern)
791 LV.mergeVisibility(HiddenVisibility, true);
792
793 // Note that Sema::MergeCompatibleFunctionDecls already takes care of
794 // merging storage classes and visibility attributes, so we don't have to
795 // look at previous decls in here.
796
797 // In C++, then if the type of the function uses a type with
798 // unique-external linkage, it's not legally usable from outside
799 // this translation unit. However, we should use the C linkage
800 // rules instead for extern "C" declarations.
801 if (Context.getLangOpts().CPlusPlus && !isFirstInExternCContext(Function)) {
802 // Only look at the type-as-written. Otherwise, deducing the return type
803 // of a function could change its linkage.
804 QualType TypeAsWritten = Function->getType();
805 if (TypeSourceInfo *TSI = Function->getTypeSourceInfo())
806 TypeAsWritten = TSI->getType();
807 if (!isExternallyVisible(TypeAsWritten->getLinkage()))
808 return LinkageInfo::uniqueExternal();
809 }
810
811 // Consider LV from the template and the template arguments.
812 // We're at file scope, so we do not need to worry about nested
813 // specializations.
814 if (FunctionTemplateSpecializationInfo *specInfo
815 = Function->getTemplateSpecializationInfo()) {
816 mergeTemplateLV(LV, Function, specInfo, computation);
817 }
818
819 // - a named class (Clause 9), or an unnamed class defined in a
820 // typedef declaration in which the class has the typedef name
821 // for linkage purposes (7.1.3); or
822 // - a named enumeration (7.2), or an unnamed enumeration
823 // defined in a typedef declaration in which the enumeration
824 // has the typedef name for linkage purposes (7.1.3); or
825 } else if (const auto *Tag = dyn_cast<TagDecl>(D)) {
826 // Unnamed tags have no linkage.
827 if (!Tag->hasNameForLinkage())
828 return LinkageInfo::none();
829
830 // If this is a class template specialization, consider the
831 // linkage of the template and template arguments. We're at file
832 // scope, so we do not need to worry about nested specializations.
833 if (const auto *spec = dyn_cast<ClassTemplateSpecializationDecl>(Tag)) {
834 mergeTemplateLV(LV, spec, computation);
835 }
836
837 // - an enumerator belonging to an enumeration with external linkage;
838 } else if (isa<EnumConstantDecl>(D)) {
839 LinkageInfo EnumLV = getLVForDecl(cast<NamedDecl>(D->getDeclContext()),
840 computation);
841 if (!isExternalFormalLinkage(EnumLV.getLinkage()))
842 return LinkageInfo::none();
843 LV.merge(EnumLV);
844
845 // - a template, unless it is a function template that has
846 // internal linkage (Clause 14);
847 } else if (const auto *temp = dyn_cast<TemplateDecl>(D)) {
848 bool considerVisibility = !hasExplicitVisibilityAlready(computation);
849 LinkageInfo tempLV =
850 getLVForTemplateParameterList(temp->getTemplateParameters(), computation);
851 LV.mergeMaybeWithVisibility(tempLV, considerVisibility);
852
853 // - a namespace (7.3), unless it is declared within an unnamed
854 // namespace.
855 //
856 // We handled names in anonymous namespaces above.
857 } else if (isa<NamespaceDecl>(D)) {
858 return LV;
859
860 // By extension, we assign external linkage to Objective-C
861 // interfaces.
862 } else if (isa<ObjCInterfaceDecl>(D)) {
863 // fallout
864
865 } else if (auto *TD = dyn_cast<TypedefNameDecl>(D)) {
866 // A typedef declaration has linkage if it gives a type a name for
867 // linkage purposes.
868 if (!TD->getAnonDeclWithTypedefName(/*AnyRedecl*/true))
869 return LinkageInfo::none();
870
871 // Everything not covered here has no linkage.
872 } else {
873 return LinkageInfo::none();
874 }
875
876 // If we ended up with non-externally-visible linkage, visibility should
877 // always be default.
878 if (!isExternallyVisible(LV.getLinkage()))
879 return LinkageInfo(LV.getLinkage(), DefaultVisibility, false);
880
881 return LV;
882}
883
884LinkageInfo
885LinkageComputer::getLVForClassMember(const NamedDecl *D,
886 LVComputationKind computation,
887 bool IgnoreVarTypeLinkage) {
888 // Only certain class members have linkage. Note that fields don't
889 // really have linkage, but it's convenient to say they do for the
890 // purposes of calculating linkage of pointer-to-data-member
891 // template arguments.
892 //
893 // Templates also don't officially have linkage, but since we ignore
894 // the C++ standard and look at template arguments when determining
895 // linkage and visibility of a template specialization, we might hit
896 // a template template argument that way. If we do, we need to
897 // consider its linkage.
898 if (!(isa<CXXMethodDecl>(D) ||
899 isa<VarDecl>(D) ||
900 isa<FieldDecl>(D) ||
901 isa<IndirectFieldDecl>(D) ||
902 isa<TagDecl>(D) ||
903 isa<TemplateDecl>(D)))
904 return LinkageInfo::none();
905
906 LinkageInfo LV;
907
908 // If we have an explicit visibility attribute, merge that in.
909 if (!hasExplicitVisibilityAlready(computation)) {
910 if (Optional<Visibility> Vis = getExplicitVisibility(D, computation))
911 LV.mergeVisibility(*Vis, true);
912 // If we're paying attention to global visibility, apply
913 // -finline-visibility-hidden if this is an inline method.
914 //
915 // Note that we do this before merging information about
916 // the class visibility.
917 if (!LV.isVisibilityExplicit() && useInlineVisibilityHidden(D))
918 LV.mergeVisibility(HiddenVisibility, /*visibilityExplicit=*/false);
919 }
920
921 // If this class member has an explicit visibility attribute, the only
922 // thing that can change its visibility is the template arguments, so
923 // only look for them when processing the class.
924 LVComputationKind classComputation = computation;
925 if (LV.isVisibilityExplicit())
926 classComputation = withExplicitVisibilityAlready(computation);
927
928 LinkageInfo classLV =
929 getLVForDecl(cast<RecordDecl>(D->getDeclContext()), classComputation);
930 // The member has the same linkage as the class. If that's not externally
931 // visible, we don't need to compute anything about the linkage.
932 // FIXME: If we're only computing linkage, can we bail out here?
933 if (!isExternallyVisible(classLV.getLinkage()))
934 return classLV;
935
936
937 // Otherwise, don't merge in classLV yet, because in certain cases
938 // we need to completely ignore the visibility from it.
939
940 // Specifically, if this decl exists and has an explicit attribute.
941 const NamedDecl *explicitSpecSuppressor = nullptr;
942
943 if (const auto *MD = dyn_cast<CXXMethodDecl>(D)) {
944 // Only look at the type-as-written. Otherwise, deducing the return type
945 // of a function could change its linkage.
946 QualType TypeAsWritten = MD->getType();
947 if (TypeSourceInfo *TSI = MD->getTypeSourceInfo())
948 TypeAsWritten = TSI->getType();
949 if (!isExternallyVisible(TypeAsWritten->getLinkage()))
950 return LinkageInfo::uniqueExternal();
951
952 // If this is a method template specialization, use the linkage for
953 // the template parameters and arguments.
954 if (FunctionTemplateSpecializationInfo *spec
955 = MD->getTemplateSpecializationInfo()) {
956 mergeTemplateLV(LV, MD, spec, computation);
957 if (spec->isExplicitSpecialization()) {
958 explicitSpecSuppressor = MD;
959 } else if (isExplicitMemberSpecialization(spec->getTemplate())) {
960 explicitSpecSuppressor = spec->getTemplate()->getTemplatedDecl();
961 }
962 } else if (isExplicitMemberSpecialization(MD)) {
963 explicitSpecSuppressor = MD;
964 }
965
966 } else if (const auto *RD = dyn_cast<CXXRecordDecl>(D)) {
967 if (const auto *spec = dyn_cast<ClassTemplateSpecializationDecl>(RD)) {
968 mergeTemplateLV(LV, spec, computation);
969 if (spec->isExplicitSpecialization()) {
970 explicitSpecSuppressor = spec;
971 } else {
972 const ClassTemplateDecl *temp = spec->getSpecializedTemplate();
973 if (isExplicitMemberSpecialization(temp)) {
974 explicitSpecSuppressor = temp->getTemplatedDecl();
975 }
976 }
977 } else if (isExplicitMemberSpecialization(RD)) {
978 explicitSpecSuppressor = RD;
979 }
980
981 // Static data members.
982 } else if (const auto *VD = dyn_cast<VarDecl>(D)) {
983 if (const auto *spec = dyn_cast<VarTemplateSpecializationDecl>(VD))
984 mergeTemplateLV(LV, spec, computation);
985
986 // Modify the variable's linkage by its type, but ignore the
987 // type's visibility unless it's a definition.
988 if (!IgnoreVarTypeLinkage) {
989 LinkageInfo typeLV = getLVForType(*VD->getType(), computation);
990 // FIXME: If the type's linkage is not externally visible, we can
991 // give this static data member UniqueExternalLinkage.
992 if (!LV.isVisibilityExplicit() && !classLV.isVisibilityExplicit())
993 LV.mergeVisibility(typeLV);
994 LV.mergeExternalVisibility(typeLV);
995 }
996
997 if (isExplicitMemberSpecialization(VD)) {
998 explicitSpecSuppressor = VD;
999 }
1000
1001 // Template members.
1002 } else if (const auto *temp = dyn_cast<TemplateDecl>(D)) {
1003 bool considerVisibility =
1004 (!LV.isVisibilityExplicit() &&
1005 !classLV.isVisibilityExplicit() &&
1006 !hasExplicitVisibilityAlready(computation));
1007 LinkageInfo tempLV =
1008 getLVForTemplateParameterList(temp->getTemplateParameters(), computation);
1009 LV.mergeMaybeWithVisibility(tempLV, considerVisibility);
1010
1011 if (const auto *redeclTemp = dyn_cast<RedeclarableTemplateDecl>(temp)) {
1012 if (isExplicitMemberSpecialization(redeclTemp)) {
1013 explicitSpecSuppressor = temp->getTemplatedDecl();
1014 }
1015 }
1016 }
1017
1018 // We should never be looking for an attribute directly on a template.
1019 assert(!explicitSpecSuppressor || !isa<TemplateDecl>(explicitSpecSuppressor))((!explicitSpecSuppressor || !isa<TemplateDecl>(explicitSpecSuppressor
)) ? static_cast<void> (0) : __assert_fail ("!explicitSpecSuppressor || !isa<TemplateDecl>(explicitSpecSuppressor)"
, "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 1019, __PRETTY_FUNCTION__))
;
1020
1021 // If this member is an explicit member specialization, and it has
1022 // an explicit attribute, ignore visibility from the parent.
1023 bool considerClassVisibility = true;
1024 if (explicitSpecSuppressor &&
1025 // optimization: hasDVA() is true only with explicit visibility.
1026 LV.isVisibilityExplicit() &&
1027 classLV.getVisibility() != DefaultVisibility &&
1028 hasDirectVisibilityAttribute(explicitSpecSuppressor, computation)) {
1029 considerClassVisibility = false;
1030 }
1031
1032 // Finally, merge in information from the class.
1033 LV.mergeMaybeWithVisibility(classLV, considerClassVisibility);
1034 return LV;
1035}
1036
1037void NamedDecl::anchor() {}
1038
1039bool NamedDecl::isLinkageValid() const {
1040 if (!hasCachedLinkage())
1041 return true;
1042
1043 Linkage L = LinkageComputer{}
1044 .computeLVForDecl(this, LVComputationKind::forLinkageOnly())
1045 .getLinkage();
1046 return L == getCachedLinkage();
1047}
1048
1049ObjCStringFormatFamily NamedDecl::getObjCFStringFormattingFamily() const {
1050 StringRef name = getName();
1051 if (name.empty()) return SFF_None;
1052
1053 if (name.front() == 'C')
1054 if (name == "CFStringCreateWithFormat" ||
1055 name == "CFStringCreateWithFormatAndArguments" ||
1056 name == "CFStringAppendFormat" ||
1057 name == "CFStringAppendFormatAndArguments")
1058 return SFF_CFString;
1059 return SFF_None;
1060}
1061
1062Linkage NamedDecl::getLinkageInternal() const {
1063 // We don't care about visibility here, so ask for the cheapest
1064 // possible visibility analysis.
1065 return LinkageComputer{}
1066 .getLVForDecl(this, LVComputationKind::forLinkageOnly())
1067 .getLinkage();
1068}
1069
1070LinkageInfo NamedDecl::getLinkageAndVisibility() const {
1071 return LinkageComputer{}.getDeclLinkageAndVisibility(this);
1072}
1073
1074static Optional<Visibility>
1075getExplicitVisibilityAux(const NamedDecl *ND,
1076 NamedDecl::ExplicitVisibilityKind kind,
1077 bool IsMostRecent) {
1078 assert(!IsMostRecent || ND == ND->getMostRecentDecl())((!IsMostRecent || ND == ND->getMostRecentDecl()) ? static_cast
<void> (0) : __assert_fail ("!IsMostRecent || ND == ND->getMostRecentDecl()"
, "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 1078, __PRETTY_FUNCTION__))
;
1079
1080 // Check the declaration itself first.
1081 if (Optional<Visibility> V = getVisibilityOf(ND, kind))
1082 return V;
1083
1084 // If this is a member class of a specialization of a class template
1085 // and the corresponding decl has explicit visibility, use that.
1086 if (const auto *RD = dyn_cast<CXXRecordDecl>(ND)) {
1087 CXXRecordDecl *InstantiatedFrom = RD->getInstantiatedFromMemberClass();
1088 if (InstantiatedFrom)
1089 return getVisibilityOf(InstantiatedFrom, kind);
1090 }
1091
1092 // If there wasn't explicit visibility there, and this is a
1093 // specialization of a class template, check for visibility
1094 // on the pattern.
1095 if (const auto *spec = dyn_cast<ClassTemplateSpecializationDecl>(ND)) {
1096 // Walk all the template decl till this point to see if there are
1097 // explicit visibility attributes.
1098 const auto *TD = spec->getSpecializedTemplate()->getTemplatedDecl();
1099 while (TD != nullptr) {
1100 auto Vis = getVisibilityOf(TD, kind);
1101 if (Vis != None)
1102 return Vis;
1103 TD = TD->getPreviousDecl();
1104 }
1105 return None;
1106 }
1107
1108 // Use the most recent declaration.
1109 if (!IsMostRecent && !isa<NamespaceDecl>(ND)) {
1110 const NamedDecl *MostRecent = ND->getMostRecentDecl();
1111 if (MostRecent != ND)
1112 return getExplicitVisibilityAux(MostRecent, kind, true);
1113 }
1114
1115 if (const auto *Var = dyn_cast<VarDecl>(ND)) {
1116 if (Var->isStaticDataMember()) {
1117 VarDecl *InstantiatedFrom = Var->getInstantiatedFromStaticDataMember();
1118 if (InstantiatedFrom)
1119 return getVisibilityOf(InstantiatedFrom, kind);
1120 }
1121
1122 if (const auto *VTSD = dyn_cast<VarTemplateSpecializationDecl>(Var))
1123 return getVisibilityOf(VTSD->getSpecializedTemplate()->getTemplatedDecl(),
1124 kind);
1125
1126 return None;
1127 }
1128 // Also handle function template specializations.
1129 if (const auto *fn = dyn_cast<FunctionDecl>(ND)) {
1130 // If the function is a specialization of a template with an
1131 // explicit visibility attribute, use that.
1132 if (FunctionTemplateSpecializationInfo *templateInfo
1133 = fn->getTemplateSpecializationInfo())
1134 return getVisibilityOf(templateInfo->getTemplate()->getTemplatedDecl(),
1135 kind);
1136
1137 // If the function is a member of a specialization of a class template
1138 // and the corresponding decl has explicit visibility, use that.
1139 FunctionDecl *InstantiatedFrom = fn->getInstantiatedFromMemberFunction();
1140 if (InstantiatedFrom)
1141 return getVisibilityOf(InstantiatedFrom, kind);
1142
1143 return None;
1144 }
1145
1146 // The visibility of a template is stored in the templated decl.
1147 if (const auto *TD = dyn_cast<TemplateDecl>(ND))
1148 return getVisibilityOf(TD->getTemplatedDecl(), kind);
1149
1150 return None;
1151}
1152
1153Optional<Visibility>
1154NamedDecl::getExplicitVisibility(ExplicitVisibilityKind kind) const {
1155 return getExplicitVisibilityAux(this, kind, false);
1156}
1157
1158LinkageInfo LinkageComputer::getLVForClosure(const DeclContext *DC,
1159 Decl *ContextDecl,
1160 LVComputationKind computation) {
1161 // This lambda has its linkage/visibility determined by its owner.
1162 const NamedDecl *Owner;
1163 if (!ContextDecl)
1164 Owner = dyn_cast<NamedDecl>(DC);
1165 else if (isa<ParmVarDecl>(ContextDecl))
1166 Owner =
1167 dyn_cast<NamedDecl>(ContextDecl->getDeclContext()->getRedeclContext());
1168 else
1169 Owner = cast<NamedDecl>(ContextDecl);
1170
1171 if (!Owner)
1172 return LinkageInfo::none();
1173
1174 // If the owner has a deduced type, we need to skip querying the linkage and
1175 // visibility of that type, because it might involve this closure type. The
1176 // only effect of this is that we might give a lambda VisibleNoLinkage rather
1177 // than NoLinkage when we don't strictly need to, which is benign.
1178 auto *VD = dyn_cast<VarDecl>(Owner);
1179 LinkageInfo OwnerLV =
1180 VD && VD->getType()->getContainedDeducedType()
1181 ? computeLVForDecl(Owner, computation, /*IgnoreVarTypeLinkage*/true)
1182 : getLVForDecl(Owner, computation);
1183
1184 // A lambda never formally has linkage. But if the owner is externally
1185 // visible, then the lambda is too. We apply the same rules to blocks.
1186 if (!isExternallyVisible(OwnerLV.getLinkage()))
1187 return LinkageInfo::none();
1188 return LinkageInfo(VisibleNoLinkage, OwnerLV.getVisibility(),
1189 OwnerLV.isVisibilityExplicit());
1190}
1191
1192LinkageInfo LinkageComputer::getLVForLocalDecl(const NamedDecl *D,
1193 LVComputationKind computation) {
1194 if (const auto *Function = dyn_cast<FunctionDecl>(D)) {
1195 if (Function->isInAnonymousNamespace() &&
1196 !isFirstInExternCContext(Function))
1197 return getInternalLinkageFor(Function);
1198
1199 // This is a "void f();" which got merged with a file static.
1200 if (Function->getCanonicalDecl()->getStorageClass() == SC_Static)
1201 return getInternalLinkageFor(Function);
1202
1203 LinkageInfo LV;
1204 if (!hasExplicitVisibilityAlready(computation)) {
1205 if (Optional<Visibility> Vis =
1206 getExplicitVisibility(Function, computation))
1207 LV.mergeVisibility(*Vis, true);
1208 }
1209
1210 // Note that Sema::MergeCompatibleFunctionDecls already takes care of
1211 // merging storage classes and visibility attributes, so we don't have to
1212 // look at previous decls in here.
1213
1214 return LV;
1215 }
1216
1217 if (const auto *Var = dyn_cast<VarDecl>(D)) {
1218 if (Var->hasExternalStorage()) {
1219 if (Var->isInAnonymousNamespace() && !isFirstInExternCContext(Var))
1220 return getInternalLinkageFor(Var);
1221
1222 LinkageInfo LV;
1223 if (Var->getStorageClass() == SC_PrivateExtern)
1224 LV.mergeVisibility(HiddenVisibility, true);
1225 else if (!hasExplicitVisibilityAlready(computation)) {
1226 if (Optional<Visibility> Vis = getExplicitVisibility(Var, computation))
1227 LV.mergeVisibility(*Vis, true);
1228 }
1229
1230 if (const VarDecl *Prev = Var->getPreviousDecl()) {
1231 LinkageInfo PrevLV = getLVForDecl(Prev, computation);
1232 if (PrevLV.getLinkage())
1233 LV.setLinkage(PrevLV.getLinkage());
1234 LV.mergeVisibility(PrevLV);
1235 }
1236
1237 return LV;
1238 }
1239
1240 if (!Var->isStaticLocal())
1241 return LinkageInfo::none();
1242 }
1243
1244 ASTContext &Context = D->getASTContext();
1245 if (!Context.getLangOpts().CPlusPlus)
1246 return LinkageInfo::none();
1247
1248 const Decl *OuterD = getOutermostFuncOrBlockContext(D);
1249 if (!OuterD || OuterD->isInvalidDecl())
1250 return LinkageInfo::none();
1251
1252 LinkageInfo LV;
1253 if (const auto *BD = dyn_cast<BlockDecl>(OuterD)) {
1254 if (!BD->getBlockManglingNumber())
1255 return LinkageInfo::none();
1256
1257 LV = getLVForClosure(BD->getDeclContext()->getRedeclContext(),
1258 BD->getBlockManglingContextDecl(), computation);
1259 } else {
1260 const auto *FD = cast<FunctionDecl>(OuterD);
1261 if (!FD->isInlined() &&
1262 !isTemplateInstantiation(FD->getTemplateSpecializationKind()))
1263 return LinkageInfo::none();
1264
1265 // If a function is hidden by -fvisibility-inlines-hidden option and
1266 // is not explicitly attributed as a hidden function,
1267 // we should not make static local variables in the function hidden.
1268 LV = getLVForDecl(FD, computation);
1269 if (isa<VarDecl>(D) && useInlineVisibilityHidden(FD) &&
1270 !LV.isVisibilityExplicit()) {
1271 assert(cast<VarDecl>(D)->isStaticLocal())((cast<VarDecl>(D)->isStaticLocal()) ? static_cast<
void> (0) : __assert_fail ("cast<VarDecl>(D)->isStaticLocal()"
, "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 1271, __PRETTY_FUNCTION__))
;
1272 // If this was an implicitly hidden inline method, check again for
1273 // explicit visibility on the parent class, and use that for static locals
1274 // if present.
1275 if (const auto *MD = dyn_cast<CXXMethodDecl>(FD))
1276 LV = getLVForDecl(MD->getParent(), computation);
1277 if (!LV.isVisibilityExplicit()) {
1278 Visibility globalVisibility =
1279 computation.isValueVisibility()
1280 ? Context.getLangOpts().getValueVisibilityMode()
1281 : Context.getLangOpts().getTypeVisibilityMode();
1282 return LinkageInfo(VisibleNoLinkage, globalVisibility,
1283 /*visibilityExplicit=*/false);
1284 }
1285 }
1286 }
1287 if (!isExternallyVisible(LV.getLinkage()))
1288 return LinkageInfo::none();
1289 return LinkageInfo(VisibleNoLinkage, LV.getVisibility(),
1290 LV.isVisibilityExplicit());
1291}
1292
1293static inline const CXXRecordDecl*
1294getOutermostEnclosingLambda(const CXXRecordDecl *Record) {
1295 const CXXRecordDecl *Ret = Record;
1296 while (Record && Record->isLambda()) {
1297 Ret = Record;
1298 if (!Record->getParent()) break;
1299 // Get the Containing Class of this Lambda Class
1300 Record = dyn_cast_or_null<CXXRecordDecl>(
1301 Record->getParent()->getParent());
1302 }
1303 return Ret;
1304}
1305
1306LinkageInfo LinkageComputer::computeLVForDecl(const NamedDecl *D,
1307 LVComputationKind computation,
1308 bool IgnoreVarTypeLinkage) {
1309 // Internal_linkage attribute overrides other considerations.
1310 if (D->hasAttr<InternalLinkageAttr>())
1311 return getInternalLinkageFor(D);
1312
1313 // Objective-C: treat all Objective-C declarations as having external
1314 // linkage.
1315 switch (D->getKind()) {
1316 default:
1317 break;
1318
1319 // Per C++ [basic.link]p2, only the names of objects, references,
1320 // functions, types, templates, namespaces, and values ever have linkage.
1321 //
1322 // Note that the name of a typedef, namespace alias, using declaration,
1323 // and so on are not the name of the corresponding type, namespace, or
1324 // declaration, so they do *not* have linkage.
1325 case Decl::ImplicitParam:
1326 case Decl::Label:
1327 case Decl::NamespaceAlias:
1328 case Decl::ParmVar:
1329 case Decl::Using:
1330 case Decl::UsingShadow:
1331 case Decl::UsingDirective:
1332 return LinkageInfo::none();
1333
1334 case Decl::EnumConstant:
1335 // C++ [basic.link]p4: an enumerator has the linkage of its enumeration.
1336 if (D->getASTContext().getLangOpts().CPlusPlus)
1337 return getLVForDecl(cast<EnumDecl>(D->getDeclContext()), computation);
1338 return LinkageInfo::visible_none();
1339
1340 case Decl::Typedef:
1341 case Decl::TypeAlias:
1342 // A typedef declaration has linkage if it gives a type a name for
1343 // linkage purposes.
1344 if (!cast<TypedefNameDecl>(D)
1345 ->getAnonDeclWithTypedefName(/*AnyRedecl*/true))
1346 return LinkageInfo::none();
1347 break;
1348
1349 case Decl::TemplateTemplateParm: // count these as external
1350 case Decl::NonTypeTemplateParm:
1351 case Decl::ObjCAtDefsField:
1352 case Decl::ObjCCategory:
1353 case Decl::ObjCCategoryImpl:
1354 case Decl::ObjCCompatibleAlias:
1355 case Decl::ObjCImplementation:
1356 case Decl::ObjCMethod:
1357 case Decl::ObjCProperty:
1358 case Decl::ObjCPropertyImpl:
1359 case Decl::ObjCProtocol:
1360 return getExternalLinkageFor(D);
1361
1362 case Decl::CXXRecord: {
1363 const auto *Record = cast<CXXRecordDecl>(D);
1364 if (Record->isLambda()) {
1365 if (!Record->getLambdaManglingNumber()) {
1366 // This lambda has no mangling number, so it's internal.
1367 return getInternalLinkageFor(D);
1368 }
1369
1370 // This lambda has its linkage/visibility determined:
1371 // - either by the outermost lambda if that lambda has no mangling
1372 // number.
1373 // - or by the parent of the outer most lambda
1374 // This prevents infinite recursion in settings such as nested lambdas
1375 // used in NSDMI's, for e.g.
1376 // struct L {
1377 // int t{};
1378 // int t2 = ([](int a) { return [](int b) { return b; };})(t)(t);
1379 // };
1380 const CXXRecordDecl *OuterMostLambda =
1381 getOutermostEnclosingLambda(Record);
1382 if (!OuterMostLambda->getLambdaManglingNumber())
1383 return getInternalLinkageFor(D);
1384
1385 return getLVForClosure(
1386 OuterMostLambda->getDeclContext()->getRedeclContext(),
1387 OuterMostLambda->getLambdaContextDecl(), computation);
1388 }
1389
1390 break;
1391 }
1392 }
1393
1394 // Handle linkage for namespace-scope names.
1395 if (D->getDeclContext()->getRedeclContext()->isFileContext())
1396 return getLVForNamespaceScopeDecl(D, computation, IgnoreVarTypeLinkage);
1397
1398 // C++ [basic.link]p5:
1399 // In addition, a member function, static data member, a named
1400 // class or enumeration of class scope, or an unnamed class or
1401 // enumeration defined in a class-scope typedef declaration such
1402 // that the class or enumeration has the typedef name for linkage
1403 // purposes (7.1.3), has external linkage if the name of the class
1404 // has external linkage.
1405 if (D->getDeclContext()->isRecord())
1406 return getLVForClassMember(D, computation, IgnoreVarTypeLinkage);
1407
1408 // C++ [basic.link]p6:
1409 // The name of a function declared in block scope and the name of
1410 // an object declared by a block scope extern declaration have
1411 // linkage. If there is a visible declaration of an entity with
1412 // linkage having the same name and type, ignoring entities
1413 // declared outside the innermost enclosing namespace scope, the
1414 // block scope declaration declares that same entity and receives
1415 // the linkage of the previous declaration. If there is more than
1416 // one such matching entity, the program is ill-formed. Otherwise,
1417 // if no matching entity is found, the block scope entity receives
1418 // external linkage.
1419 if (D->getDeclContext()->isFunctionOrMethod())
1420 return getLVForLocalDecl(D, computation);
1421
1422 // C++ [basic.link]p6:
1423 // Names not covered by these rules have no linkage.
1424 return LinkageInfo::none();
1425}
1426
1427/// getLVForDecl - Get the linkage and visibility for the given declaration.
1428LinkageInfo LinkageComputer::getLVForDecl(const NamedDecl *D,
1429 LVComputationKind computation) {
1430 // Internal_linkage attribute overrides other considerations.
1431 if (D->hasAttr<InternalLinkageAttr>())
1432 return getInternalLinkageFor(D);
1433
1434 if (computation.IgnoreAllVisibility && D->hasCachedLinkage())
1435 return LinkageInfo(D->getCachedLinkage(), DefaultVisibility, false);
1436
1437 if (llvm::Optional<LinkageInfo> LI = lookup(D, computation))
1438 return *LI;
1439
1440 LinkageInfo LV = computeLVForDecl(D, computation);
1441 if (D->hasCachedLinkage())
1442 assert(D->getCachedLinkage() == LV.getLinkage())((D->getCachedLinkage() == LV.getLinkage()) ? static_cast<
void> (0) : __assert_fail ("D->getCachedLinkage() == LV.getLinkage()"
, "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 1442, __PRETTY_FUNCTION__))
;
1443
1444 D->setCachedLinkage(LV.getLinkage());
1445 cache(D, computation, LV);
1446
1447#ifndef NDEBUG
1448 // In C (because of gnu inline) and in c++ with microsoft extensions an
1449 // static can follow an extern, so we can have two decls with different
1450 // linkages.
1451 const LangOptions &Opts = D->getASTContext().getLangOpts();
1452 if (!Opts.CPlusPlus || Opts.MicrosoftExt)
1453 return LV;
1454
1455 // We have just computed the linkage for this decl. By induction we know
1456 // that all other computed linkages match, check that the one we just
1457 // computed also does.
1458 NamedDecl *Old = nullptr;
1459 for (auto I : D->redecls()) {
1460 auto *T = cast<NamedDecl>(I);
1461 if (T == D)
1462 continue;
1463 if (!T->isInvalidDecl() && T->hasCachedLinkage()) {
1464 Old = T;
1465 break;
1466 }
1467 }
1468 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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 1468, __PRETTY_FUNCTION__))
;
1469#endif
1470
1471 return LV;
1472}
1473
1474LinkageInfo LinkageComputer::getDeclLinkageAndVisibility(const NamedDecl *D) {
1475 return getLVForDecl(D,
1476 LVComputationKind(usesTypeVisibility(D)
1477 ? NamedDecl::VisibilityForType
1478 : NamedDecl::VisibilityForValue));
1479}
1480
1481Module *Decl::getOwningModuleForLinkage(bool IgnoreLinkage) const {
1482 Module *M = getOwningModule();
1483 if (!M)
1484 return nullptr;
1485
1486 switch (M->Kind) {
1487 case Module::ModuleMapModule:
1488 // Module map modules have no special linkage semantics.
1489 return nullptr;
1490
1491 case Module::ModuleInterfaceUnit:
1492 return M;
1493
1494 case Module::GlobalModuleFragment: {
1495 // External linkage declarations in the global module have no owning module
1496 // for linkage purposes. But internal linkage declarations in the global
1497 // module fragment of a particular module are owned by that module for
1498 // linkage purposes.
1499 if (IgnoreLinkage)
1500 return nullptr;
1501 bool InternalLinkage;
1502 if (auto *ND = dyn_cast<NamedDecl>(this))
1503 InternalLinkage = !ND->hasExternalFormalLinkage();
1504 else {
1505 auto *NSD = dyn_cast<NamespaceDecl>(this);
1506 InternalLinkage = (NSD && NSD->isAnonymousNamespace()) ||
1507 isInAnonymousNamespace();
1508 }
1509 return InternalLinkage ? M->Parent : nullptr;
1510 }
1511 }
1512
1513 llvm_unreachable("unknown module kind")::llvm::llvm_unreachable_internal("unknown module kind", "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 1513)
;
1514}
1515
1516void NamedDecl::printName(raw_ostream &os) const {
1517 os << Name;
1518}
1519
1520std::string NamedDecl::getQualifiedNameAsString() const {
1521 std::string QualName;
1522 llvm::raw_string_ostream OS(QualName);
1523 printQualifiedName(OS, getASTContext().getPrintingPolicy());
1524 return OS.str();
1525}
1526
1527void NamedDecl::printQualifiedName(raw_ostream &OS) const {
1528 printQualifiedName(OS, getASTContext().getPrintingPolicy());
1529}
1530
1531void NamedDecl::printQualifiedName(raw_ostream &OS,
1532 const PrintingPolicy &P) const {
1533 const DeclContext *Ctx = getDeclContext();
1534
1535 // For ObjC methods, look through categories and use the interface as context.
1536 if (auto *MD = dyn_cast<ObjCMethodDecl>(this))
1537 if (auto *ID = MD->getClassInterface())
1538 Ctx = ID;
1539
1540 if (Ctx->isFunctionOrMethod()) {
1541 printName(OS);
1542 return;
1543 }
1544
1545 using ContextsTy = SmallVector<const DeclContext *, 8>;
1546 ContextsTy Contexts;
1547
1548 // Collect named contexts.
1549 while (Ctx) {
1550 if (isa<NamedDecl>(Ctx))
1551 Contexts.push_back(Ctx);
1552 Ctx = Ctx->getParent();
1553 }
1554
1555 for (const DeclContext *DC : llvm::reverse(Contexts)) {
1556 if (const auto *Spec = dyn_cast<ClassTemplateSpecializationDecl>(DC)) {
1557 OS << Spec->getName();
1558 const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs();
1559 printTemplateArgumentList(OS, TemplateArgs.asArray(), P);
1560 } else if (const auto *ND = dyn_cast<NamespaceDecl>(DC)) {
1561 if (P.SuppressUnwrittenScope &&
1562 (ND->isAnonymousNamespace() || ND->isInline()))
1563 continue;
1564 if (ND->isAnonymousNamespace()) {
1565 OS << (P.MSVCFormatting ? "`anonymous namespace\'"
1566 : "(anonymous namespace)");
1567 }
1568 else
1569 OS << *ND;
1570 } else if (const auto *RD = dyn_cast<RecordDecl>(DC)) {
1571 if (!RD->getIdentifier())
1572 OS << "(anonymous " << RD->getKindName() << ')';
1573 else
1574 OS << *RD;
1575 } else if (const auto *FD = dyn_cast<FunctionDecl>(DC)) {
1576 const FunctionProtoType *FT = nullptr;
1577 if (FD->hasWrittenPrototype())
1578 FT = dyn_cast<FunctionProtoType>(FD->getType()->castAs<FunctionType>());
1579
1580 OS << *FD << '(';
1581 if (FT) {
1582 unsigned NumParams = FD->getNumParams();
1583 for (unsigned i = 0; i < NumParams; ++i) {
1584 if (i)
1585 OS << ", ";
1586 OS << FD->getParamDecl(i)->getType().stream(P);
1587 }
1588
1589 if (FT->isVariadic()) {
1590 if (NumParams > 0)
1591 OS << ", ";
1592 OS << "...";
1593 }
1594 }
1595 OS << ')';
1596 } else if (const auto *ED = dyn_cast<EnumDecl>(DC)) {
1597 // C++ [dcl.enum]p10: Each enum-name and each unscoped
1598 // enumerator is declared in the scope that immediately contains
1599 // the enum-specifier. Each scoped enumerator is declared in the
1600 // scope of the enumeration.
1601 // For the case of unscoped enumerator, do not include in the qualified
1602 // name any information about its enum enclosing scope, as its visibility
1603 // is global.
1604 if (ED->isScoped())
1605 OS << *ED;
1606 else
1607 continue;
1608 } else {
1609 OS << *cast<NamedDecl>(DC);
1610 }
1611 OS << "::";
1612 }
1613
1614 if (getDeclName() || isa<DecompositionDecl>(this))
1615 OS << *this;
1616 else
1617 OS << "(anonymous)";
1618}
1619
1620void NamedDecl::getNameForDiagnostic(raw_ostream &OS,
1621 const PrintingPolicy &Policy,
1622 bool Qualified) const {
1623 if (Qualified)
1624 printQualifiedName(OS, Policy);
1625 else
1626 printName(OS);
1627}
1628
1629template<typename T> static bool isRedeclarableImpl(Redeclarable<T> *) {
1630 return true;
1631}
1632static bool isRedeclarableImpl(...) { return false; }
1633static bool isRedeclarable(Decl::Kind K) {
1634 switch (K) {
1635#define DECL(Type, Base) \
1636 case Decl::Type: \
1637 return isRedeclarableImpl((Type##Decl *)nullptr);
1638#define ABSTRACT_DECL(DECL)
1639#include "clang/AST/DeclNodes.inc"
1640 }
1641 llvm_unreachable("unknown decl kind")::llvm::llvm_unreachable_internal("unknown decl kind", "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 1641)
;
1642}
1643
1644bool NamedDecl::declarationReplaces(NamedDecl *OldD, bool IsKnownNewer) const {
1645 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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 1645, __PRETTY_FUNCTION__))
;
1646
1647 // Never replace one imported declaration with another; we need both results
1648 // when re-exporting.
1649 if (OldD->isFromASTFile() && isFromASTFile())
1650 return false;
1651
1652 // A kind mismatch implies that the declaration is not replaced.
1653 if (OldD->getKind() != getKind())
1654 return false;
1655
1656 // For method declarations, we never replace. (Why?)
1657 if (isa<ObjCMethodDecl>(this))
1658 return false;
1659
1660 // For parameters, pick the newer one. This is either an error or (in
1661 // Objective-C) permitted as an extension.
1662 if (isa<ParmVarDecl>(this))
1663 return true;
1664
1665 // Inline namespaces can give us two declarations with the same
1666 // name and kind in the same scope but different contexts; we should
1667 // keep both declarations in this case.
1668 if (!this->getDeclContext()->getRedeclContext()->Equals(
1669 OldD->getDeclContext()->getRedeclContext()))
1670 return false;
1671
1672 // Using declarations can be replaced if they import the same name from the
1673 // same context.
1674 if (auto *UD = dyn_cast<UsingDecl>(this)) {
1675 ASTContext &Context = getASTContext();
1676 return Context.getCanonicalNestedNameSpecifier(UD->getQualifier()) ==
1677 Context.getCanonicalNestedNameSpecifier(
1678 cast<UsingDecl>(OldD)->getQualifier());
1679 }
1680 if (auto *UUVD = dyn_cast<UnresolvedUsingValueDecl>(this)) {
1681 ASTContext &Context = getASTContext();
1682 return Context.getCanonicalNestedNameSpecifier(UUVD->getQualifier()) ==
1683 Context.getCanonicalNestedNameSpecifier(
1684 cast<UnresolvedUsingValueDecl>(OldD)->getQualifier());
1685 }
1686
1687 if (isRedeclarable(getKind())) {
1688 if (getCanonicalDecl() != OldD->getCanonicalDecl())
1689 return false;
1690
1691 if (IsKnownNewer)
1692 return true;
1693
1694 // Check whether this is actually newer than OldD. We want to keep the
1695 // newer declaration. This loop will usually only iterate once, because
1696 // OldD is usually the previous declaration.
1697 for (auto D : redecls()) {
1698 if (D == OldD)
1699 break;
1700
1701 // If we reach the canonical declaration, then OldD is not actually older
1702 // than this one.
1703 //
1704 // FIXME: In this case, we should not add this decl to the lookup table.
1705 if (D->isCanonicalDecl())
1706 return false;
1707 }
1708
1709 // It's a newer declaration of the same kind of declaration in the same
1710 // scope: we want this decl instead of the existing one.
1711 return true;
1712 }
1713
1714 // In all other cases, we need to keep both declarations in case they have
1715 // different visibility. Any attempt to use the name will result in an
1716 // ambiguity if more than one is visible.
1717 return false;
1718}
1719
1720bool NamedDecl::hasLinkage() const {
1721 return getFormalLinkage() != NoLinkage;
1722}
1723
1724NamedDecl *NamedDecl::getUnderlyingDeclImpl() {
1725 NamedDecl *ND = this;
1726 while (auto *UD = dyn_cast<UsingShadowDecl>(ND))
1727 ND = UD->getTargetDecl();
1728
1729 if (auto *AD = dyn_cast<ObjCCompatibleAliasDecl>(ND))
1730 return AD->getClassInterface();
1731
1732 if (auto *AD = dyn_cast<NamespaceAliasDecl>(ND))
1733 return AD->getNamespace();
1734
1735 return ND;
1736}
1737
1738bool NamedDecl::isCXXInstanceMember() const {
1739 if (!isCXXClassMember())
1740 return false;
1741
1742 const NamedDecl *D = this;
1743 if (isa<UsingShadowDecl>(D))
1744 D = cast<UsingShadowDecl>(D)->getTargetDecl();
1745
1746 if (isa<FieldDecl>(D) || isa<IndirectFieldDecl>(D) || isa<MSPropertyDecl>(D))
1747 return true;
1748 if (const auto *MD = dyn_cast_or_null<CXXMethodDecl>(D->getAsFunction()))
1749 return MD->isInstance();
1750 return false;
1751}
1752
1753//===----------------------------------------------------------------------===//
1754// DeclaratorDecl Implementation
1755//===----------------------------------------------------------------------===//
1756
1757template <typename DeclT>
1758static SourceLocation getTemplateOrInnerLocStart(const DeclT *decl) {
1759 if (decl->getNumTemplateParameterLists() > 0)
1760 return decl->getTemplateParameterList(0)->getTemplateLoc();
1761 else
1762 return decl->getInnerLocStart();
1763}
1764
1765SourceLocation DeclaratorDecl::getTypeSpecStartLoc() const {
1766 TypeSourceInfo *TSI = getTypeSourceInfo();
1767 if (TSI) return TSI->getTypeLoc().getBeginLoc();
1768 return SourceLocation();
1769}
1770
1771void DeclaratorDecl::setQualifierInfo(NestedNameSpecifierLoc QualifierLoc) {
1772 if (QualifierLoc) {
1773 // Make sure the extended decl info is allocated.
1774 if (!hasExtInfo()) {
1775 // Save (non-extended) type source info pointer.
1776 auto *savedTInfo = DeclInfo.get<TypeSourceInfo*>();
1777 // Allocate external info struct.
1778 DeclInfo = new (getASTContext()) ExtInfo;
1779 // Restore savedTInfo into (extended) decl info.
1780 getExtInfo()->TInfo = savedTInfo;
1781 }
1782 // Set qualifier info.
1783 getExtInfo()->QualifierLoc = QualifierLoc;
1784 } else {
1785 // Here Qualifier == 0, i.e., we are removing the qualifier (if any).
1786 if (hasExtInfo()) {
1787 if (getExtInfo()->NumTemplParamLists == 0) {
1788 // Save type source info pointer.
1789 TypeSourceInfo *savedTInfo = getExtInfo()->TInfo;
1790 // Deallocate the extended decl info.
1791 getASTContext().Deallocate(getExtInfo());
1792 // Restore savedTInfo into (non-extended) decl info.
1793 DeclInfo = savedTInfo;
1794 }
1795 else
1796 getExtInfo()->QualifierLoc = QualifierLoc;
1797 }
1798 }
1799}
1800
1801void DeclaratorDecl::setTemplateParameterListsInfo(
1802 ASTContext &Context, ArrayRef<TemplateParameterList *> TPLists) {
1803 assert(!TPLists.empty())((!TPLists.empty()) ? static_cast<void> (0) : __assert_fail
("!TPLists.empty()", "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 1803, __PRETTY_FUNCTION__))
;
1804 // Make sure the extended decl info is allocated.
1805 if (!hasExtInfo()) {
1806 // Save (non-extended) type source info pointer.
1807 auto *savedTInfo = DeclInfo.get<TypeSourceInfo*>();
1808 // Allocate external info struct.
1809 DeclInfo = new (getASTContext()) ExtInfo;
1810 // Restore savedTInfo into (extended) decl info.
1811 getExtInfo()->TInfo = savedTInfo;
1812 }
1813 // Set the template parameter lists info.
1814 getExtInfo()->setTemplateParameterListsInfo(Context, TPLists);
1815}
1816
1817SourceLocation DeclaratorDecl::getOuterLocStart() const {
1818 return getTemplateOrInnerLocStart(this);
1819}
1820
1821// Helper function: returns true if QT is or contains a type
1822// having a postfix component.
1823static bool typeIsPostfix(QualType QT) {
1824 while (true) {
1825 const Type* T = QT.getTypePtr();
1826 switch (T->getTypeClass()) {
1827 default:
1828 return false;
1829 case Type::Pointer:
1830 QT = cast<PointerType>(T)->getPointeeType();
1831 break;
1832 case Type::BlockPointer:
1833 QT = cast<BlockPointerType>(T)->getPointeeType();
1834 break;
1835 case Type::MemberPointer:
1836 QT = cast<MemberPointerType>(T)->getPointeeType();
1837 break;
1838 case Type::LValueReference:
1839 case Type::RValueReference:
1840 QT = cast<ReferenceType>(T)->getPointeeType();
1841 break;
1842 case Type::PackExpansion:
1843 QT = cast<PackExpansionType>(T)->getPattern();
1844 break;
1845 case Type::Paren:
1846 case Type::ConstantArray:
1847 case Type::DependentSizedArray:
1848 case Type::IncompleteArray:
1849 case Type::VariableArray:
1850 case Type::FunctionProto:
1851 case Type::FunctionNoProto:
1852 return true;
1853 }
1854 }
1855}
1856
1857SourceRange DeclaratorDecl::getSourceRange() const {
1858 SourceLocation RangeEnd = getLocation();
1859 if (TypeSourceInfo *TInfo = getTypeSourceInfo()) {
1860 // If the declaration has no name or the type extends past the name take the
1861 // end location of the type.
1862 if (!getDeclName() || typeIsPostfix(TInfo->getType()))
1863 RangeEnd = TInfo->getTypeLoc().getSourceRange().getEnd();
1864 }
1865 return SourceRange(getOuterLocStart(), RangeEnd);
1866}
1867
1868void QualifierInfo::setTemplateParameterListsInfo(
1869 ASTContext &Context, ArrayRef<TemplateParameterList *> TPLists) {
1870 // Free previous template parameters (if any).
1871 if (NumTemplParamLists > 0) {
1872 Context.Deallocate(TemplParamLists);
1873 TemplParamLists = nullptr;
1874 NumTemplParamLists = 0;
1875 }
1876 // Set info on matched template parameter lists (if any).
1877 if (!TPLists.empty()) {
1878 TemplParamLists = new (Context) TemplateParameterList *[TPLists.size()];
1879 NumTemplParamLists = TPLists.size();
1880 std::copy(TPLists.begin(), TPLists.end(), TemplParamLists);
1881 }
1882}
1883
1884//===----------------------------------------------------------------------===//
1885// VarDecl Implementation
1886//===----------------------------------------------------------------------===//
1887
1888const char *VarDecl::getStorageClassSpecifierString(StorageClass SC) {
1889 switch (SC) {
1890 case SC_None: break;
1891 case SC_Auto: return "auto";
1892 case SC_Extern: return "extern";
1893 case SC_PrivateExtern: return "__private_extern__";
1894 case SC_Register: return "register";
1895 case SC_Static: return "static";
1896 }
1897
1898 llvm_unreachable("Invalid storage class")::llvm::llvm_unreachable_internal("Invalid storage class", "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 1898)
;
1899}
1900
1901VarDecl::VarDecl(Kind DK, ASTContext &C, DeclContext *DC,
1902 SourceLocation StartLoc, SourceLocation IdLoc,
1903 IdentifierInfo *Id, QualType T, TypeSourceInfo *TInfo,
1904 StorageClass SC)
1905 : DeclaratorDecl(DK, DC, IdLoc, Id, T, TInfo, StartLoc),
1906 redeclarable_base(C) {
1907 static_assert(sizeof(VarDeclBitfields) <= sizeof(unsigned),
1908 "VarDeclBitfields too large!");
1909 static_assert(sizeof(ParmVarDeclBitfields) <= sizeof(unsigned),
1910 "ParmVarDeclBitfields too large!");
1911 static_assert(sizeof(NonParmVarDeclBitfields) <= sizeof(unsigned),
1912 "NonParmVarDeclBitfields too large!");
1913 AllBits = 0;
1914 VarDeclBits.SClass = SC;
1915 // Everything else is implicitly initialized to false.
1916}
1917
1918VarDecl *VarDecl::Create(ASTContext &C, DeclContext *DC,
1919 SourceLocation StartL, SourceLocation IdL,
1920 IdentifierInfo *Id, QualType T, TypeSourceInfo *TInfo,
1921 StorageClass S) {
1922 return new (C, DC) VarDecl(Var, C, DC, StartL, IdL, Id, T, TInfo, S);
1923}
1924
1925VarDecl *VarDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
1926 return new (C, ID)
1927 VarDecl(Var, C, nullptr, SourceLocation(), SourceLocation(), nullptr,
1928 QualType(), nullptr, SC_None);
1929}
1930
1931void VarDecl::setStorageClass(StorageClass SC) {
1932 assert(isLegalForVariable(SC))((isLegalForVariable(SC)) ? static_cast<void> (0) : __assert_fail
("isLegalForVariable(SC)", "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 1932, __PRETTY_FUNCTION__))
;
1933 VarDeclBits.SClass = SC;
1934}
1935
1936VarDecl::TLSKind VarDecl::getTLSKind() const {
1937 switch (VarDeclBits.TSCSpec) {
1938 case TSCS_unspecified:
1939 if (!hasAttr<ThreadAttr>() &&
1940 !(getASTContext().getLangOpts().OpenMPUseTLS &&
1941 getASTContext().getTargetInfo().isTLSSupported() &&
1942 hasAttr<OMPThreadPrivateDeclAttr>()))
1943 return TLS_None;
1944 return ((getASTContext().getLangOpts().isCompatibleWithMSVC(
1945 LangOptions::MSVC2015)) ||
1946 hasAttr<OMPThreadPrivateDeclAttr>())
1947 ? TLS_Dynamic
1948 : TLS_Static;
1949 case TSCS___thread: // Fall through.
1950 case TSCS__Thread_local:
1951 return TLS_Static;
1952 case TSCS_thread_local:
1953 return TLS_Dynamic;
1954 }
1955 llvm_unreachable("Unknown thread storage class specifier!")::llvm::llvm_unreachable_internal("Unknown thread storage class specifier!"
, "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 1955)
;
1956}
1957
1958SourceRange VarDecl::getSourceRange() const {
1959 if (const Expr *Init = getInit()) {
1960 SourceLocation InitEnd = Init->getEndLoc();
1961 // If Init is implicit, ignore its source range and fallback on
1962 // DeclaratorDecl::getSourceRange() to handle postfix elements.
1963 if (InitEnd.isValid() && InitEnd != getLocation())
1964 return SourceRange(getOuterLocStart(), InitEnd);
1965 }
1966 return DeclaratorDecl::getSourceRange();
1967}
1968
1969template<typename T>
1970static LanguageLinkage getDeclLanguageLinkage(const T &D) {
1971 // C++ [dcl.link]p1: All function types, function names with external linkage,
1972 // and variable names with external linkage have a language linkage.
1973 if (!D.hasExternalFormalLinkage())
1974 return NoLanguageLinkage;
1975
1976 // Language linkage is a C++ concept, but saying that everything else in C has
1977 // C language linkage fits the implementation nicely.
1978 ASTContext &Context = D.getASTContext();
1979 if (!Context.getLangOpts().CPlusPlus)
1980 return CLanguageLinkage;
1981
1982 // C++ [dcl.link]p4: A C language linkage is ignored in determining the
1983 // language linkage of the names of class members and the function type of
1984 // class member functions.
1985 const DeclContext *DC = D.getDeclContext();
1986 if (DC->isRecord())
1987 return CXXLanguageLinkage;
1988
1989 // If the first decl is in an extern "C" context, any other redeclaration
1990 // will have C language linkage. If the first one is not in an extern "C"
1991 // context, we would have reported an error for any other decl being in one.
1992 if (isFirstInExternCContext(&D))
1993 return CLanguageLinkage;
1994 return CXXLanguageLinkage;
1995}
1996
1997template<typename T>
1998static bool isDeclExternC(const T &D) {
1999 // Since the context is ignored for class members, they can only have C++
2000 // language linkage or no language linkage.
2001 const DeclContext *DC = D.getDeclContext();
2002 if (DC->isRecord()) {
2003 assert(D.getASTContext().getLangOpts().CPlusPlus)((D.getASTContext().getLangOpts().CPlusPlus) ? static_cast<
void> (0) : __assert_fail ("D.getASTContext().getLangOpts().CPlusPlus"
, "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 2003, __PRETTY_FUNCTION__))
;
2004 return false;
2005 }
2006
2007 return D.getLanguageLinkage() == CLanguageLinkage;
2008}
2009
2010LanguageLinkage VarDecl::getLanguageLinkage() const {
2011 return getDeclLanguageLinkage(*this);
2012}
2013
2014bool VarDecl::isExternC() const {
2015 return isDeclExternC(*this);
2016}
2017
2018bool VarDecl::isInExternCContext() const {
2019 return getLexicalDeclContext()->isExternCContext();
2020}
2021
2022bool VarDecl::isInExternCXXContext() const {
2023 return getLexicalDeclContext()->isExternCXXContext();
2024}
2025
2026VarDecl *VarDecl::getCanonicalDecl() { return getFirstDecl(); }
2027
2028VarDecl::DefinitionKind
2029VarDecl::isThisDeclarationADefinition(ASTContext &C) const {
2030 if (isThisDeclarationADemotedDefinition())
2031 return DeclarationOnly;
2032
2033 // C++ [basic.def]p2:
2034 // A declaration is a definition unless [...] it contains the 'extern'
2035 // specifier or a linkage-specification and neither an initializer [...],
2036 // it declares a non-inline static data member in a class declaration [...],
2037 // it declares a static data member outside a class definition and the variable
2038 // was defined within the class with the constexpr specifier [...],
2039 // C++1y [temp.expl.spec]p15:
2040 // An explicit specialization of a static data member or an explicit
2041 // specialization of a static data member template is a definition if the
2042 // declaration includes an initializer; otherwise, it is a declaration.
2043 //
2044 // FIXME: How do you declare (but not define) a partial specialization of
2045 // a static data member template outside the containing class?
2046 if (isStaticDataMember()) {
2047 if (isOutOfLine() &&
2048 !(getCanonicalDecl()->isInline() &&
2049 getCanonicalDecl()->isConstexpr()) &&
2050 (hasInit() ||
2051 // If the first declaration is out-of-line, this may be an
2052 // instantiation of an out-of-line partial specialization of a variable
2053 // template for which we have not yet instantiated the initializer.
2054 (getFirstDecl()->isOutOfLine()
2055 ? getTemplateSpecializationKind() == TSK_Undeclared
2056 : getTemplateSpecializationKind() !=
2057 TSK_ExplicitSpecialization) ||
2058 isa<VarTemplatePartialSpecializationDecl>(this)))
2059 return Definition;
2060 else if (!isOutOfLine() && isInline())
2061 return Definition;
2062 else
2063 return DeclarationOnly;
2064 }
2065 // C99 6.7p5:
2066 // A definition of an identifier is a declaration for that identifier that
2067 // [...] causes storage to be reserved for that object.
2068 // Note: that applies for all non-file-scope objects.
2069 // C99 6.9.2p1:
2070 // If the declaration of an identifier for an object has file scope and an
2071 // initializer, the declaration is an external definition for the identifier
2072 if (hasInit())
2073 return Definition;
2074
2075 if (hasDefiningAttr())
2076 return Definition;
2077
2078 if (const auto *SAA = getAttr<SelectAnyAttr>())
2079 if (!SAA->isInherited())
2080 return Definition;
2081
2082 // A variable template specialization (other than a static data member
2083 // template or an explicit specialization) is a declaration until we
2084 // instantiate its initializer.
2085 if (auto *VTSD = dyn_cast<VarTemplateSpecializationDecl>(this)) {
2086 if (VTSD->getTemplateSpecializationKind() != TSK_ExplicitSpecialization &&
2087 !isa<VarTemplatePartialSpecializationDecl>(VTSD) &&
2088 !VTSD->IsCompleteDefinition)
2089 return DeclarationOnly;
2090 }
2091
2092 if (hasExternalStorage())
2093 return DeclarationOnly;
2094
2095 // [dcl.link] p7:
2096 // A declaration directly contained in a linkage-specification is treated
2097 // as if it contains the extern specifier for the purpose of determining
2098 // the linkage of the declared name and whether it is a definition.
2099 if (isSingleLineLanguageLinkage(*this))
2100 return DeclarationOnly;
2101
2102 // C99 6.9.2p2:
2103 // A declaration of an object that has file scope without an initializer,
2104 // and without a storage class specifier or the scs 'static', constitutes
2105 // a tentative definition.
2106 // No such thing in C++.
2107 if (!C.getLangOpts().CPlusPlus && isFileVarDecl())
2108 return TentativeDefinition;
2109
2110 // What's left is (in C, block-scope) declarations without initializers or
2111 // external storage. These are definitions.
2112 return Definition;
2113}
2114
2115VarDecl *VarDecl::getActingDefinition() {
2116 DefinitionKind Kind = isThisDeclarationADefinition();
2117 if (Kind != TentativeDefinition)
2118 return nullptr;
2119
2120 VarDecl *LastTentative = nullptr;
2121 VarDecl *First = getFirstDecl();
2122 for (auto I : First->redecls()) {
2123 Kind = I->isThisDeclarationADefinition();
2124 if (Kind == Definition)
2125 return nullptr;
2126 else if (Kind == TentativeDefinition)
2127 LastTentative = I;
2128 }
2129 return LastTentative;
2130}
2131
2132VarDecl *VarDecl::getDefinition(ASTContext &C) {
2133 VarDecl *First = getFirstDecl();
2134 for (auto I : First->redecls()) {
2135 if (I->isThisDeclarationADefinition(C) == Definition)
2136 return I;
2137 }
2138 return nullptr;
2139}
2140
2141VarDecl::DefinitionKind VarDecl::hasDefinition(ASTContext &C) const {
2142 DefinitionKind Kind = DeclarationOnly;
2143
2144 const VarDecl *First = getFirstDecl();
2145 for (auto I : First->redecls()) {
2146 Kind = std::max(Kind, I->isThisDeclarationADefinition(C));
2147 if (Kind == Definition)
2148 break;
2149 }
2150
2151 return Kind;
2152}
2153
2154const Expr *VarDecl::getAnyInitializer(const VarDecl *&D) const {
2155 for (auto I : redecls()) {
2156 if (auto Expr = I->getInit()) {
2157 D = I;
2158 return Expr;
2159 }
2160 }
2161 return nullptr;
2162}
2163
2164bool VarDecl::hasInit() const {
2165 if (auto *P = dyn_cast<ParmVarDecl>(this))
2166 if (P->hasUnparsedDefaultArg() || P->hasUninstantiatedDefaultArg())
2167 return false;
2168
2169 return !Init.isNull();
2170}
2171
2172Expr *VarDecl::getInit() {
2173 if (!hasInit())
2174 return nullptr;
2175
2176 if (auto *S = Init.dyn_cast<Stmt *>())
2177 return cast<Expr>(S);
2178
2179 return cast_or_null<Expr>(Init.get<EvaluatedStmt *>()->Value);
2180}
2181
2182Stmt **VarDecl::getInitAddress() {
2183 if (auto *ES = Init.dyn_cast<EvaluatedStmt *>())
2184 return &ES->Value;
2185
2186 return Init.getAddrOfPtr1();
2187}
2188
2189bool VarDecl::isOutOfLine() const {
2190 if (Decl::isOutOfLine())
2191 return true;
2192
2193 if (!isStaticDataMember())
2194 return false;
2195
2196 // If this static data member was instantiated from a static data member of
2197 // a class template, check whether that static data member was defined
2198 // out-of-line.
2199 if (VarDecl *VD = getInstantiatedFromStaticDataMember())
2200 return VD->isOutOfLine();
2201
2202 return false;
2203}
2204
2205void VarDecl::setInit(Expr *I) {
2206 if (auto *Eval = Init.dyn_cast<EvaluatedStmt *>()) {
2207 Eval->~EvaluatedStmt();
2208 getASTContext().Deallocate(Eval);
2209 }
2210
2211 Init = I;
2212}
2213
2214bool VarDecl::isUsableInConstantExpressions(ASTContext &C) const {
2215 const LangOptions &Lang = C.getLangOpts();
2216
2217 if (!Lang.CPlusPlus)
2218 return false;
2219
2220 // In C++11, any variable of reference type can be used in a constant
2221 // expression if it is initialized by a constant expression.
2222 if (Lang.CPlusPlus11 && getType()->isReferenceType())
2223 return true;
2224
2225 // Only const objects can be used in constant expressions in C++. C++98 does
2226 // not require the variable to be non-volatile, but we consider this to be a
2227 // defect.
2228 if (!getType().isConstQualified() || getType().isVolatileQualified())
2229 return false;
2230
2231 // In C++, const, non-volatile variables of integral or enumeration types
2232 // can be used in constant expressions.
2233 if (getType()->isIntegralOrEnumerationType())
2234 return true;
2235
2236 // Additionally, in C++11, non-volatile constexpr variables can be used in
2237 // constant expressions.
2238 return Lang.CPlusPlus11 && isConstexpr();
2239}
2240
2241/// Convert the initializer for this declaration to the elaborated EvaluatedStmt
2242/// form, which contains extra information on the evaluated value of the
2243/// initializer.
2244EvaluatedStmt *VarDecl::ensureEvaluatedStmt() const {
2245 auto *Eval = Init.dyn_cast<EvaluatedStmt *>();
2246 if (!Eval) {
2247 // Note: EvaluatedStmt contains an APValue, which usually holds
2248 // resources not allocated from the ASTContext. We need to do some
2249 // work to avoid leaking those, but we do so in VarDecl::evaluateValue
2250 // where we can detect whether there's anything to clean up or not.
2251 Eval = new (getASTContext()) EvaluatedStmt;
2252 Eval->Value = Init.get<Stmt *>();
2253 Init = Eval;
2254 }
2255 return Eval;
2256}
2257
2258APValue *VarDecl::evaluateValue() const {
2259 SmallVector<PartialDiagnosticAt, 8> Notes;
2260 return evaluateValue(Notes);
2261}
2262
2263APValue *VarDecl::evaluateValue(
2264 SmallVectorImpl<PartialDiagnosticAt> &Notes) const {
2265 EvaluatedStmt *Eval = ensureEvaluatedStmt();
2266
2267 // We only produce notes indicating why an initializer is non-constant the
2268 // first time it is evaluated. FIXME: The notes won't always be emitted the
2269 // first time we try evaluation, so might not be produced at all.
2270 if (Eval->WasEvaluated)
2271 return Eval->Evaluated.isUninit() ? nullptr : &Eval->Evaluated;
2272
2273 const auto *Init = cast<Expr>(Eval->Value);
2274 assert(!Init->isValueDependent())((!Init->isValueDependent()) ? static_cast<void> (0)
: __assert_fail ("!Init->isValueDependent()", "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 2274, __PRETTY_FUNCTION__))
;
2275
2276 if (Eval->IsEvaluating) {
2277 // FIXME: Produce a diagnostic for self-initialization.
2278 Eval->CheckedICE = true;
2279 Eval->IsICE = false;
2280 return nullptr;
2281 }
2282
2283 Eval->IsEvaluating = true;
2284
2285 bool Result = Init->EvaluateAsInitializer(Eval->Evaluated, getASTContext(),
2286 this, Notes);
2287
2288 // Ensure the computed APValue is cleaned up later if evaluation succeeded,
2289 // or that it's empty (so that there's nothing to clean up) if evaluation
2290 // failed.
2291 if (!Result)
2292 Eval->Evaluated = APValue();
2293 else if (Eval->Evaluated.needsCleanup())
2294 getASTContext().addDestruction(&Eval->Evaluated);
2295
2296 Eval->IsEvaluating = false;
2297 Eval->WasEvaluated = true;
2298
2299 // In C++11, we have determined whether the initializer was a constant
2300 // expression as a side-effect.
2301 if (getASTContext().getLangOpts().CPlusPlus11 && !Eval->CheckedICE) {
2302 Eval->CheckedICE = true;
2303 Eval->IsICE = Result && Notes.empty();
2304 }
2305
2306 return Result ? &Eval->Evaluated : nullptr;
2307}
2308
2309APValue *VarDecl::getEvaluatedValue() const {
2310 if (EvaluatedStmt *Eval = Init.dyn_cast<EvaluatedStmt *>())
2311 if (Eval->WasEvaluated)
2312 return &Eval->Evaluated;
2313
2314 return nullptr;
2315}
2316
2317bool VarDecl::isInitKnownICE() const {
2318 if (EvaluatedStmt *Eval = Init.dyn_cast<EvaluatedStmt *>())
2319 return Eval->CheckedICE;
2320
2321 return false;
2322}
2323
2324bool VarDecl::isInitICE() const {
2325 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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 2326, __PRETTY_FUNCTION__))
2326 "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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 2326, __PRETTY_FUNCTION__))
;
2327 return Init.get<EvaluatedStmt *>()->IsICE;
2328}
2329
2330bool VarDecl::checkInitIsICE() const {
2331 // Initializers of weak variables are never ICEs.
2332 if (isWeak())
2333 return false;
2334
2335 EvaluatedStmt *Eval = ensureEvaluatedStmt();
2336 if (Eval->CheckedICE)
2337 // We have already checked whether this subexpression is an
2338 // integral constant expression.
2339 return Eval->IsICE;
2340
2341 const auto *Init = cast<Expr>(Eval->Value);
2342 assert(!Init->isValueDependent())((!Init->isValueDependent()) ? static_cast<void> (0)
: __assert_fail ("!Init->isValueDependent()", "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 2342, __PRETTY_FUNCTION__))
;
2343
2344 // In C++11, evaluate the initializer to check whether it's a constant
2345 // expression.
2346 if (getASTContext().getLangOpts().CPlusPlus11) {
2347 SmallVector<PartialDiagnosticAt, 8> Notes;
2348 evaluateValue(Notes);
2349 return Eval->IsICE;
2350 }
2351
2352 // It's an ICE whether or not the definition we found is
2353 // out-of-line. See DR 721 and the discussion in Clang PR
2354 // 6206 for details.
2355
2356 if (Eval->CheckingICE)
2357 return false;
2358 Eval->CheckingICE = true;
2359
2360 Eval->IsICE = Init->isIntegerConstantExpr(getASTContext());
2361 Eval->CheckingICE = false;
2362 Eval->CheckedICE = true;
2363 return Eval->IsICE;
2364}
2365
2366template<typename DeclT>
2367static DeclT *getDefinitionOrSelf(DeclT *D) {
2368 assert(D)((D) ? static_cast<void> (0) : __assert_fail ("D", "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 2368, __PRETTY_FUNCTION__))
;
2369 if (auto *Def = D->getDefinition())
2370 return Def;
2371 return D;
2372}
2373
2374bool VarDecl::isEscapingByref() const {
2375 return hasAttr<BlocksAttr>() && NonParmVarDeclBits.EscapingByref;
2376}
2377
2378bool VarDecl::isNonEscapingByref() const {
2379 return hasAttr<BlocksAttr>() && !NonParmVarDeclBits.EscapingByref;
2380}
2381
2382VarDecl *VarDecl::getTemplateInstantiationPattern() const {
2383 // If it's a variable template specialization, find the template or partial
2384 // specialization from which it was instantiated.
2385 if (auto *VDTemplSpec = dyn_cast<VarTemplateSpecializationDecl>(this)) {
2386 auto From = VDTemplSpec->getInstantiatedFrom();
2387 if (auto *VTD = From.dyn_cast<VarTemplateDecl *>()) {
2388 while (auto *NewVTD = VTD->getInstantiatedFromMemberTemplate()) {
2389 if (NewVTD->isMemberSpecialization())
2390 break;
2391 VTD = NewVTD;
2392 }
2393 return getDefinitionOrSelf(VTD->getTemplatedDecl());
2394 }
2395 if (auto *VTPSD =
2396 From.dyn_cast<VarTemplatePartialSpecializationDecl *>()) {
2397 while (auto *NewVTPSD = VTPSD->getInstantiatedFromMember()) {
2398 if (NewVTPSD->isMemberSpecialization())
2399 break;
2400 VTPSD = NewVTPSD;
2401 }
2402 return getDefinitionOrSelf<VarDecl>(VTPSD);
2403 }
2404 }
2405
2406 if (MemberSpecializationInfo *MSInfo = getMemberSpecializationInfo()) {
2407 if (isTemplateInstantiation(MSInfo->getTemplateSpecializationKind())) {
2408 VarDecl *VD = getInstantiatedFromStaticDataMember();
2409 while (auto *NewVD = VD->getInstantiatedFromStaticDataMember())
2410 VD = NewVD;
2411 return getDefinitionOrSelf(VD);
2412 }
2413 }
2414
2415 if (VarTemplateDecl *VarTemplate = getDescribedVarTemplate()) {
2416 while (VarTemplate->getInstantiatedFromMemberTemplate()) {
2417 if (VarTemplate->isMemberSpecialization())
2418 break;
2419 VarTemplate = VarTemplate->getInstantiatedFromMemberTemplate();
2420 }
2421
2422 return getDefinitionOrSelf(VarTemplate->getTemplatedDecl());
2423 }
2424 return nullptr;
2425}
2426
2427VarDecl *VarDecl::getInstantiatedFromStaticDataMember() const {
2428 if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo())
2429 return cast<VarDecl>(MSI->getInstantiatedFrom());
2430
2431 return nullptr;
2432}
2433
2434TemplateSpecializationKind VarDecl::getTemplateSpecializationKind() const {
2435 if (const auto *Spec = dyn_cast<VarTemplateSpecializationDecl>(this))
2436 return Spec->getSpecializationKind();
2437
2438 if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo())
2439 return MSI->getTemplateSpecializationKind();
2440
2441 return TSK_Undeclared;
2442}
2443
2444SourceLocation VarDecl::getPointOfInstantiation() const {
2445 if (const auto *Spec = dyn_cast<VarTemplateSpecializationDecl>(this))
2446 return Spec->getPointOfInstantiation();
2447
2448 if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo())
2449 return MSI->getPointOfInstantiation();
2450
2451 return SourceLocation();
2452}
2453
2454VarTemplateDecl *VarDecl::getDescribedVarTemplate() const {
2455 return getASTContext().getTemplateOrSpecializationInfo(this)
2456 .dyn_cast<VarTemplateDecl *>();
2457}
2458
2459void VarDecl::setDescribedVarTemplate(VarTemplateDecl *Template) {
2460 getASTContext().setTemplateOrSpecializationInfo(this, Template);
2461}
2462
2463bool VarDecl::isKnownToBeDefined() const {
2464 const auto &LangOpts = getASTContext().getLangOpts();
2465 // In CUDA mode without relocatable device code, variables of form 'extern
2466 // __shared__ Foo foo[]' are pointers to the base of the GPU core's shared
2467 // memory pool. These are never undefined variables, even if they appear
2468 // inside of an anon namespace or static function.
2469 //
2470 // With CUDA relocatable device code enabled, these variables don't get
2471 // special handling; they're treated like regular extern variables.
2472 if (LangOpts.CUDA && !LangOpts.GPURelocatableDeviceCode &&
2473 hasExternalStorage() && hasAttr<CUDASharedAttr>() &&
2474 isa<IncompleteArrayType>(getType()))
2475 return true;
2476
2477 return hasDefinition();
2478}
2479
2480bool VarDecl::isNoDestroy(const ASTContext &Ctx) const {
2481 return hasGlobalStorage() && (hasAttr<NoDestroyAttr>() ||
2482 (!Ctx.getLangOpts().RegisterStaticDestructors &&
2483 !hasAttr<AlwaysDestroyAttr>()));
2484}
2485
2486MemberSpecializationInfo *VarDecl::getMemberSpecializationInfo() const {
2487 if (isStaticDataMember())
2488 // FIXME: Remove ?
2489 // return getASTContext().getInstantiatedFromStaticDataMember(this);
2490 return getASTContext().getTemplateOrSpecializationInfo(this)
2491 .dyn_cast<MemberSpecializationInfo *>();
2492 return nullptr;
2493}
2494
2495void VarDecl::setTemplateSpecializationKind(TemplateSpecializationKind TSK,
2496 SourceLocation PointOfInstantiation) {
2497 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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 2499, __PRETTY_FUNCTION__))
2498 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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 2499, __PRETTY_FUNCTION__))
2499 "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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 2499, __PRETTY_FUNCTION__))
;
2500
2501 if (VarTemplateSpecializationDecl *Spec =
2502 dyn_cast<VarTemplateSpecializationDecl>(this)) {
2503 Spec->setSpecializationKind(TSK);
2504 if (TSK != TSK_ExplicitSpecialization && PointOfInstantiation.isValid() &&
2505 Spec->getPointOfInstantiation().isInvalid()) {
2506 Spec->setPointOfInstantiation(PointOfInstantiation);
2507 if (ASTMutationListener *L = getASTContext().getASTMutationListener())
2508 L->InstantiationRequested(this);
2509 }
2510 }
2511
2512 if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo()) {
2513 MSI->setTemplateSpecializationKind(TSK);
2514 if (TSK != TSK_ExplicitSpecialization && PointOfInstantiation.isValid() &&
2515 MSI->getPointOfInstantiation().isInvalid()) {
2516 MSI->setPointOfInstantiation(PointOfInstantiation);
2517 if (ASTMutationListener *L = getASTContext().getASTMutationListener())
2518 L->InstantiationRequested(this);
2519 }
2520 }
2521}
2522
2523void
2524VarDecl::setInstantiationOfStaticDataMember(VarDecl *VD,
2525 TemplateSpecializationKind TSK) {
2526 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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 2527, __PRETTY_FUNCTION__))
2527 "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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 2527, __PRETTY_FUNCTION__))
;
2528 getASTContext().setInstantiatedFromStaticDataMember(this, VD, TSK);
2529}
2530
2531//===----------------------------------------------------------------------===//
2532// ParmVarDecl Implementation
2533//===----------------------------------------------------------------------===//
2534
2535ParmVarDecl *ParmVarDecl::Create(ASTContext &C, DeclContext *DC,
2536 SourceLocation StartLoc,
2537 SourceLocation IdLoc, IdentifierInfo *Id,
2538 QualType T, TypeSourceInfo *TInfo,
2539 StorageClass S, Expr *DefArg) {
2540 return new (C, DC) ParmVarDecl(ParmVar, C, DC, StartLoc, IdLoc, Id, T, TInfo,
2541 S, DefArg);
2542}
2543
2544QualType ParmVarDecl::getOriginalType() const {
2545 TypeSourceInfo *TSI = getTypeSourceInfo();
2546 QualType T = TSI ? TSI->getType() : getType();
2547 if (const auto *DT = dyn_cast<DecayedType>(T))
2548 return DT->getOriginalType();
2549 return T;
2550}
2551
2552ParmVarDecl *ParmVarDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2553 return new (C, ID)
2554 ParmVarDecl(ParmVar, C, nullptr, SourceLocation(), SourceLocation(),
2555 nullptr, QualType(), nullptr, SC_None, nullptr);
2556}
2557
2558SourceRange ParmVarDecl::getSourceRange() const {
2559 if (!hasInheritedDefaultArg()) {
2560 SourceRange ArgRange = getDefaultArgRange();
2561 if (ArgRange.isValid())
2562 return SourceRange(getOuterLocStart(), ArgRange.getEnd());
2563 }
2564
2565 // DeclaratorDecl considers the range of postfix types as overlapping with the
2566 // declaration name, but this is not the case with parameters in ObjC methods.
2567 if (isa<ObjCMethodDecl>(getDeclContext()))
2568 return SourceRange(DeclaratorDecl::getBeginLoc(), getLocation());
2569
2570 return DeclaratorDecl::getSourceRange();
2571}
2572
2573Expr *ParmVarDecl::getDefaultArg() {
2574 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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 2574, __PRETTY_FUNCTION__))
;
2575 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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 2576, __PRETTY_FUNCTION__))
2576 "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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 2576, __PRETTY_FUNCTION__))
;
2577
2578 Expr *Arg = getInit();
2579 if (auto *E = dyn_cast_or_null<FullExpr>(Arg))
2580 return E->getSubExpr();
2581
2582 return Arg;
2583}
2584
2585void ParmVarDecl::setDefaultArg(Expr *defarg) {
2586 ParmVarDeclBits.DefaultArgKind = DAK_Normal;
2587 Init = defarg;
2588}
2589
2590SourceRange ParmVarDecl::getDefaultArgRange() const {
2591 switch (ParmVarDeclBits.DefaultArgKind) {
2592 case DAK_None:
2593 case DAK_Unparsed:
2594 // Nothing we can do here.
2595 return SourceRange();
2596
2597 case DAK_Uninstantiated:
2598 return getUninstantiatedDefaultArg()->getSourceRange();
2599
2600 case DAK_Normal:
2601 if (const Expr *E = getInit())
2602 return E->getSourceRange();
2603
2604 // Missing an actual expression, may be invalid.
2605 return SourceRange();
2606 }
2607 llvm_unreachable("Invalid default argument kind.")::llvm::llvm_unreachable_internal("Invalid default argument kind."
, "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 2607)
;
2608}
2609
2610void ParmVarDecl::setUninstantiatedDefaultArg(Expr *arg) {
2611 ParmVarDeclBits.DefaultArgKind = DAK_Uninstantiated;
2612 Init = arg;
2613}
2614
2615Expr *ParmVarDecl::getUninstantiatedDefaultArg() {
2616 assert(hasUninstantiatedDefaultArg() &&((hasUninstantiatedDefaultArg() && "Wrong kind of initialization expression!"
) ? static_cast<void> (0) : __assert_fail ("hasUninstantiatedDefaultArg() && \"Wrong kind of initialization expression!\""
, "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 2617, __PRETTY_FUNCTION__))
2617 "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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 2617, __PRETTY_FUNCTION__))
;
2618 return cast_or_null<Expr>(Init.get<Stmt *>());
2619}
2620
2621bool ParmVarDecl::hasDefaultArg() const {
2622 // FIXME: We should just return false for DAK_None here once callers are
2623 // prepared for the case that we encountered an invalid default argument and
2624 // were unable to even build an invalid expression.
2625 return hasUnparsedDefaultArg() || hasUninstantiatedDefaultArg() ||
2626 !Init.isNull();
2627}
2628
2629bool ParmVarDecl::isParameterPack() const {
2630 return isa<PackExpansionType>(getType());
2631}
2632
2633void ParmVarDecl::setParameterIndexLarge(unsigned parameterIndex) {
2634 getASTContext().setParameterIndex(this, parameterIndex);
2635 ParmVarDeclBits.ParameterIndex = ParameterIndexSentinel;
2636}
2637
2638unsigned ParmVarDecl::getParameterIndexLarge() const {
2639 return getASTContext().getParameterIndex(this);
2640}
2641
2642//===----------------------------------------------------------------------===//
2643// FunctionDecl Implementation
2644//===----------------------------------------------------------------------===//
2645
2646FunctionDecl::FunctionDecl(Kind DK, ASTContext &C, DeclContext *DC,
2647 SourceLocation StartLoc,
2648 const DeclarationNameInfo &NameInfo, QualType T,
2649 TypeSourceInfo *TInfo, StorageClass S,
2650 bool isInlineSpecified, bool isConstexprSpecified)
2651 : DeclaratorDecl(DK, DC, NameInfo.getLoc(), NameInfo.getName(), T, TInfo,
2652 StartLoc),
2653 DeclContext(DK), redeclarable_base(C), ODRHash(0),
2654 EndRangeLoc(NameInfo.getEndLoc()), DNLoc(NameInfo.getInfo()) {
2655 assert(T.isNull() || T->isFunctionType())((T.isNull() || T->isFunctionType()) ? static_cast<void
> (0) : __assert_fail ("T.isNull() || T->isFunctionType()"
, "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 2655, __PRETTY_FUNCTION__))
;
2656 FunctionDeclBits.SClass = S;
2657 FunctionDeclBits.IsInline = isInlineSpecified;
2658 FunctionDeclBits.IsInlineSpecified = isInlineSpecified;
2659 FunctionDeclBits.IsExplicitSpecified = false;
2660 FunctionDeclBits.IsVirtualAsWritten = false;
2661 FunctionDeclBits.IsPure = false;
2662 FunctionDeclBits.HasInheritedPrototype = false;
2663 FunctionDeclBits.HasWrittenPrototype = true;
2664 FunctionDeclBits.IsDeleted = false;
2665 FunctionDeclBits.IsTrivial = false;
2666 FunctionDeclBits.IsTrivialForCall = false;
2667 FunctionDeclBits.IsDefaulted = false;
2668 FunctionDeclBits.IsExplicitlyDefaulted = false;
2669 FunctionDeclBits.HasImplicitReturnZero = false;
2670 FunctionDeclBits.IsLateTemplateParsed = false;
2671 FunctionDeclBits.IsConstexpr = isConstexprSpecified;
2672 FunctionDeclBits.InstantiationIsPending = false;
2673 FunctionDeclBits.UsesSEHTry = false;
2674 FunctionDeclBits.HasSkippedBody = false;
2675 FunctionDeclBits.WillHaveBody = false;
2676 FunctionDeclBits.IsMultiVersion = false;
2677 FunctionDeclBits.IsCopyDeductionCandidate = false;
2678 FunctionDeclBits.HasODRHash = false;
2679}
2680
2681void FunctionDecl::getNameForDiagnostic(
2682 raw_ostream &OS, const PrintingPolicy &Policy, bool Qualified) const {
2683 NamedDecl::getNameForDiagnostic(OS, Policy, Qualified);
2684 const TemplateArgumentList *TemplateArgs = getTemplateSpecializationArgs();
2685 if (TemplateArgs)
2686 printTemplateArgumentList(OS, TemplateArgs->asArray(), Policy);
2687}
2688
2689bool FunctionDecl::isVariadic() const {
2690 if (const auto *FT = getType()->getAs<FunctionProtoType>())
2691 return FT->isVariadic();
2692 return false;
2693}
2694
2695bool FunctionDecl::hasBody(const FunctionDecl *&Definition) const {
2696 for (auto I : redecls()) {
2697 if (I->doesThisDeclarationHaveABody()) {
2698 Definition = I;
2699 return true;
2700 }
2701 }
2702
2703 return false;
2704}
2705
2706bool FunctionDecl::hasTrivialBody() const
2707{
2708 Stmt *S = getBody();
2709 if (!S) {
2710 // Since we don't have a body for this function, we don't know if it's
2711 // trivial or not.
2712 return false;
2713 }
2714
2715 if (isa<CompoundStmt>(S) && cast<CompoundStmt>(S)->body_empty())
2716 return true;
2717 return false;
2718}
2719
2720bool FunctionDecl::isDefined(const FunctionDecl *&Definition) const {
2721 for (auto I : redecls()) {
2722 if (I->isThisDeclarationADefinition()) {
2723 Definition = I;
2724 return true;
2725 }
2726 }
2727
2728 return false;
2729}
2730
2731Stmt *FunctionDecl::getBody(const FunctionDecl *&Definition) const {
2732 if (!hasBody(Definition))
2733 return nullptr;
2734
2735 if (Definition->Body)
2736 return Definition->Body.get(getASTContext().getExternalSource());
2737
2738 return nullptr;
2739}
2740
2741void FunctionDecl::setBody(Stmt *B) {
2742 Body = B;
2743 if (B)
2744 EndRangeLoc = B->getEndLoc();
2745}
2746
2747void FunctionDecl::setPure(bool P) {
2748 FunctionDeclBits.IsPure = P;
2749 if (P)
2750 if (auto *Parent = dyn_cast<CXXRecordDecl>(getDeclContext()))
2751 Parent->markedVirtualFunctionPure();
2752}
2753
2754template<std::size_t Len>
2755static bool isNamed(const NamedDecl *ND, const char (&Str)[Len]) {
2756 IdentifierInfo *II = ND->getIdentifier();
2757 return II && II->isStr(Str);
2758}
2759
2760bool FunctionDecl::isMain() const {
2761 const TranslationUnitDecl *tunit =
2762 dyn_cast<TranslationUnitDecl>(getDeclContext()->getRedeclContext());
2763 return tunit &&
2764 !tunit->getASTContext().getLangOpts().Freestanding &&
2765 isNamed(this, "main");
2766}
2767
2768bool FunctionDecl::isMSVCRTEntryPoint() const {
2769 const TranslationUnitDecl *TUnit =
2770 dyn_cast<TranslationUnitDecl>(getDeclContext()->getRedeclContext());
2771 if (!TUnit)
2772 return false;
2773
2774 // Even though we aren't really targeting MSVCRT if we are freestanding,
2775 // semantic analysis for these functions remains the same.
2776
2777 // MSVCRT entry points only exist on MSVCRT targets.
2778 if (!TUnit->getASTContext().getTargetInfo().getTriple().isOSMSVCRT())
2779 return false;
2780
2781 // Nameless functions like constructors cannot be entry points.
2782 if (!getIdentifier())
2783 return false;
2784
2785 return llvm::StringSwitch<bool>(getName())
2786 .Cases("main", // an ANSI console app
2787 "wmain", // a Unicode console App
2788 "WinMain", // an ANSI GUI app
2789 "wWinMain", // a Unicode GUI app
2790 "DllMain", // a DLL
2791 true)
2792 .Default(false);
2793}
2794
2795bool FunctionDecl::isReservedGlobalPlacementOperator() const {
2796 assert(getDeclName().getNameKind() == DeclarationName::CXXOperatorName)((getDeclName().getNameKind() == DeclarationName::CXXOperatorName
) ? static_cast<void> (0) : __assert_fail ("getDeclName().getNameKind() == DeclarationName::CXXOperatorName"
, "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 2796, __PRETTY_FUNCTION__))
;
2797 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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 2800, __PRETTY_FUNCTION__))
2798 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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 2800, __PRETTY_FUNCTION__))
2799 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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 2800, __PRETTY_FUNCTION__))
2800 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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 2800, __PRETTY_FUNCTION__))
;
2801
2802 if (!getDeclContext()->getRedeclContext()->isTranslationUnit())
2803 return false;
2804
2805 const auto *proto = getType()->castAs<FunctionProtoType>();
2806 if (proto->getNumParams() != 2 || proto->isVariadic())
2807 return false;
2808
2809 ASTContext &Context =
2810 cast<TranslationUnitDecl>(getDeclContext()->getRedeclContext())
2811 ->getASTContext();
2812
2813 // The result type and first argument type are constant across all
2814 // these operators. The second argument must be exactly void*.
2815 return (proto->getParamType(1).getCanonicalType() == Context.VoidPtrTy);
2816}
2817
2818bool FunctionDecl::isReplaceableGlobalAllocationFunction(bool *IsAligned) const {
2819 if (getDeclName().getNameKind() != DeclarationName::CXXOperatorName)
2820 return false;
2821 if (getDeclName().getCXXOverloadedOperator() != OO_New &&
2822 getDeclName().getCXXOverloadedOperator() != OO_Delete &&
2823 getDeclName().getCXXOverloadedOperator() != OO_Array_New &&
2824 getDeclName().getCXXOverloadedOperator() != OO_Array_Delete)
2825 return false;
2826
2827 if (isa<CXXRecordDecl>(getDeclContext()))
2828 return false;
2829
2830 // This can only fail for an invalid 'operator new' declaration.
2831 if (!getDeclContext()->getRedeclContext()->isTranslationUnit())
2832 return false;
2833
2834 const auto *FPT = getType()->castAs<FunctionProtoType>();
2835 if (FPT->getNumParams() == 0 || FPT->getNumParams() > 3 || FPT->isVariadic())
2836 return false;
2837
2838 // If this is a single-parameter function, it must be a replaceable global
2839 // allocation or deallocation function.
2840 if (FPT->getNumParams() == 1)
2841 return true;
2842
2843 unsigned Params = 1;
2844 QualType Ty = FPT->getParamType(Params);
2845 ASTContext &Ctx = getASTContext();
2846
2847 auto Consume = [&] {
2848 ++Params;
2849 Ty = Params < FPT->getNumParams() ? FPT->getParamType(Params) : QualType();
2850 };
2851
2852 // In C++14, the next parameter can be a 'std::size_t' for sized delete.
2853 bool IsSizedDelete = false;
2854 if (Ctx.getLangOpts().SizedDeallocation &&
2855 (getDeclName().getCXXOverloadedOperator() == OO_Delete ||
2856 getDeclName().getCXXOverloadedOperator() == OO_Array_Delete) &&
2857 Ctx.hasSameType(Ty, Ctx.getSizeType())) {
2858 IsSizedDelete = true;
2859 Consume();
2860 }
2861
2862 // In C++17, the next parameter can be a 'std::align_val_t' for aligned
2863 // new/delete.
2864 if (Ctx.getLangOpts().AlignedAllocation && !Ty.isNull() && Ty->isAlignValT()) {
2865 if (IsAligned)
2866 *IsAligned = true;
2867 Consume();
2868 }
2869
2870 // Finally, if this is not a sized delete, the final parameter can
2871 // be a 'const std::nothrow_t&'.
2872 if (!IsSizedDelete && !Ty.isNull() && Ty->isReferenceType()) {
2873 Ty = Ty->getPointeeType();
2874 if (Ty.getCVRQualifiers() != Qualifiers::Const)
2875 return false;
2876 const CXXRecordDecl *RD = Ty->getAsCXXRecordDecl();
2877 if (RD && isNamed(RD, "nothrow_t") && RD->isInStdNamespace())
2878 Consume();
2879 }
2880
2881 return Params == FPT->getNumParams();
2882}
2883
2884bool FunctionDecl::isDestroyingOperatorDelete() const {
2885 // C++ P0722:
2886 // Within a class C, a single object deallocation function with signature
2887 // (T, std::destroying_delete_t, <more params>)
2888 // is a destroying operator delete.
2889 if (!isa<CXXMethodDecl>(this) || getOverloadedOperator() != OO_Delete ||
2890 getNumParams() < 2)
2891 return false;
2892
2893 auto *RD = getParamDecl(1)->getType()->getAsCXXRecordDecl();
2894 return RD && RD->isInStdNamespace() && RD->getIdentifier() &&
2895 RD->getIdentifier()->isStr("destroying_delete_t");
2896}
2897
2898LanguageLinkage FunctionDecl::getLanguageLinkage() const {
2899 return getDeclLanguageLinkage(*this);
2900}
2901
2902bool FunctionDecl::isExternC() const {
2903 return isDeclExternC(*this);
2904}
2905
2906bool FunctionDecl::isInExternCContext() const {
2907 return getLexicalDeclContext()->isExternCContext();
2908}
2909
2910bool FunctionDecl::isInExternCXXContext() const {
2911 return getLexicalDeclContext()->isExternCXXContext();
2912}
2913
2914bool FunctionDecl::isGlobal() const {
2915 if (const auto *Method = dyn_cast<CXXMethodDecl>(this))
2916 return Method->isStatic();
2917
2918 if (getCanonicalDecl()->getStorageClass() == SC_Static)
2919 return false;
2920
2921 for (const DeclContext *DC = getDeclContext();
2922 DC->isNamespace();
2923 DC = DC->getParent()) {
2924 if (const auto *Namespace = cast<NamespaceDecl>(DC)) {
2925 if (!Namespace->getDeclName())
2926 return false;
2927 break;
2928 }
2929 }
2930
2931 return true;
2932}
2933
2934bool FunctionDecl::isNoReturn() const {
2935 if (hasAttr<NoReturnAttr>() || hasAttr<CXX11NoReturnAttr>() ||
2936 hasAttr<C11NoReturnAttr>())
2937 return true;
2938
2939 if (auto *FnTy = getType()->getAs<FunctionType>())
2940 return FnTy->getNoReturnAttr();
2941
2942 return false;
2943}
2944
2945
2946MultiVersionKind FunctionDecl::getMultiVersionKind() const {
2947 if (hasAttr<TargetAttr>())
2948 return MultiVersionKind::Target;
2949 if (hasAttr<CPUDispatchAttr>())
2950 return MultiVersionKind::CPUDispatch;
2951 if (hasAttr<CPUSpecificAttr>())
2952 return MultiVersionKind::CPUSpecific;
2953 return MultiVersionKind::None;
2954}
2955
2956bool FunctionDecl::isCPUDispatchMultiVersion() const {
2957 return isMultiVersion() && hasAttr<CPUDispatchAttr>();
2958}
2959
2960bool FunctionDecl::isCPUSpecificMultiVersion() const {
2961 return isMultiVersion() && hasAttr<CPUSpecificAttr>();
2962}
2963
2964bool FunctionDecl::isTargetMultiVersion() const {
2965 return isMultiVersion() && hasAttr<TargetAttr>();
2966}
2967
2968void
2969FunctionDecl::setPreviousDeclaration(FunctionDecl *PrevDecl) {
2970 redeclarable_base::setPreviousDecl(PrevDecl);
2971
2972 if (FunctionTemplateDecl *FunTmpl = getDescribedFunctionTemplate()) {
2973 FunctionTemplateDecl *PrevFunTmpl
2974 = PrevDecl? PrevDecl->getDescribedFunctionTemplate() : nullptr;
2975 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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 2975, __PRETTY_FUNCTION__))
;
2976 FunTmpl->setPreviousDecl(PrevFunTmpl);
2977 }
2978
2979 if (PrevDecl && PrevDecl->isInlined())
2980 setImplicitlyInline(true);
2981}
2982
2983FunctionDecl *FunctionDecl::getCanonicalDecl() { return getFirstDecl(); }
2984
2985/// Returns a value indicating whether this function
2986/// corresponds to a builtin function.
2987///
2988/// The function corresponds to a built-in function if it is
2989/// declared at translation scope or within an extern "C" block and
2990/// its name matches with the name of a builtin. The returned value
2991/// will be 0 for functions that do not correspond to a builtin, a
2992/// value of type \c Builtin::ID if in the target-independent range
2993/// \c [1,Builtin::First), or a target-specific builtin value.
2994unsigned FunctionDecl::getBuiltinID() const {
2995 if (!getIdentifier())
2996 return 0;
2997
2998 unsigned BuiltinID = getIdentifier()->getBuiltinID();
2999 if (!BuiltinID)
3000 return 0;
3001
3002 ASTContext &Context = getASTContext();
3003 if (Context.getLangOpts().CPlusPlus) {
3004 const auto *LinkageDecl =
3005 dyn_cast<LinkageSpecDecl>(getFirstDecl()->getDeclContext());
3006 // In C++, the first declaration of a builtin is always inside an implicit
3007 // extern "C".
3008 // FIXME: A recognised library function may not be directly in an extern "C"
3009 // declaration, for instance "extern "C" { namespace std { decl } }".
3010 if (!LinkageDecl) {
3011 if (BuiltinID == Builtin::BI__GetExceptionInfo &&
3012 Context.getTargetInfo().getCXXABI().isMicrosoft())
3013 return Builtin::BI__GetExceptionInfo;
3014 return 0;
3015 }
3016 if (LinkageDecl->getLanguage() != LinkageSpecDecl::lang_c)
3017 return 0;
3018 }
3019
3020 // If the function is marked "overloadable", it has a different mangled name
3021 // and is not the C library function.
3022 if (hasAttr<OverloadableAttr>())
3023 return 0;
3024
3025 if (!Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID))
3026 return BuiltinID;
3027
3028 // This function has the name of a known C library
3029 // function. Determine whether it actually refers to the C library
3030 // function or whether it just has the same name.
3031
3032 // If this is a static function, it's not a builtin.
3033 if (getStorageClass() == SC_Static)
3034 return 0;
3035
3036 // OpenCL v1.2 s6.9.f - The library functions defined in
3037 // the C99 standard headers are not available.
3038 if (Context.getLangOpts().OpenCL &&
3039 Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID))
3040 return 0;
3041
3042 // CUDA does not have device-side standard library. printf and malloc are the
3043 // only special cases that are supported by device-side runtime.
3044 if (Context.getLangOpts().CUDA && hasAttr<CUDADeviceAttr>() &&
3045 !hasAttr<CUDAHostAttr>() &&
3046 !(BuiltinID == Builtin::BIprintf || BuiltinID == Builtin::BImalloc))
3047 return 0;
3048
3049 return BuiltinID;
3050}
3051
3052/// getNumParams - Return the number of parameters this function must have
3053/// based on its FunctionType. This is the length of the ParamInfo array
3054/// after it has been created.
3055unsigned FunctionDecl::getNumParams() const {
3056 const auto *FPT = getType()->getAs<FunctionProtoType>();
3057 return FPT ? FPT->getNumParams() : 0;
3058}
3059
3060void FunctionDecl::setParams(ASTContext &C,
3061 ArrayRef<ParmVarDecl *> NewParamInfo) {
3062 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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 3062, __PRETTY_FUNCTION__))
;
3063 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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 3063, __PRETTY_FUNCTION__))
;
3064
3065 // Zero params -> null pointer.
3066 if (!NewParamInfo.empty()) {
3067 ParamInfo = new (C) ParmVarDecl*[NewParamInfo.size()];
3068 std::copy(NewParamInfo.begin(), NewParamInfo.end(), ParamInfo);
3069 }
3070}
3071
3072/// getMinRequiredArguments - Returns the minimum number of arguments
3073/// needed to call this function. This may be fewer than the number of
3074/// function parameters, if some of the parameters have default
3075/// arguments (in C++) or are parameter packs (C++11).
3076unsigned FunctionDecl::getMinRequiredArguments() const {
3077 if (!getASTContext().getLangOpts().CPlusPlus)
3078 return getNumParams();
3079
3080 unsigned NumRequiredArgs = 0;
3081 for (auto *Param : parameters())
3082 if (!Param->isParameterPack() && !Param->hasDefaultArg())
3083 ++NumRequiredArgs;
3084 return NumRequiredArgs;
3085}
3086
3087/// The combination of the extern and inline keywords under MSVC forces
3088/// the function to be required.
3089///
3090/// Note: This function assumes that we will only get called when isInlined()
3091/// would return true for this FunctionDecl.
3092bool FunctionDecl::isMSExternInline() const {
3093 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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 3093, __PRETTY_FUNCTION__))
;
3094
3095 const ASTContext &Context = getASTContext();
3096 if (!Context.getTargetInfo().getCXXABI().isMicrosoft() &&
3097 !hasAttr<DLLExportAttr>())
3098 return false;
3099
3100 for (const FunctionDecl *FD = getMostRecentDecl(); FD;
3101 FD = FD->getPreviousDecl())
3102 if (!FD->isImplicit() && FD->getStorageClass() == SC_Extern)
3103 return true;
3104
3105 return false;
3106}
3107
3108static bool redeclForcesDefMSVC(const FunctionDecl *Redecl) {
3109 if (Redecl->getStorageClass() != SC_Extern)
3110 return false;
3111
3112 for (const FunctionDecl *FD = Redecl->getPreviousDecl(); FD;
3113 FD = FD->getPreviousDecl())
3114 if (!FD->isImplicit() && FD->getStorageClass() == SC_Extern)
3115 return false;
3116
3117 return true;
3118}
3119
3120static bool RedeclForcesDefC99(const FunctionDecl *Redecl) {
3121 // Only consider file-scope declarations in this test.
3122 if (!Redecl->getLexicalDeclContext()->isTranslationUnit())
3123 return false;
3124
3125 // Only consider explicit declarations; the presence of a builtin for a
3126 // libcall shouldn't affect whether a definition is externally visible.
3127 if (Redecl->isImplicit())
3128 return false;
3129
3130 if (!Redecl->isInlineSpecified() || Redecl->getStorageClass() == SC_Extern)
3131 return true; // Not an inline definition
3132
3133 return false;
3134}
3135
3136/// For a function declaration in C or C++, determine whether this
3137/// declaration causes the definition to be externally visible.
3138///
3139/// For instance, this determines if adding the current declaration to the set
3140/// of redeclarations of the given functions causes
3141/// isInlineDefinitionExternallyVisible to change from false to true.
3142bool FunctionDecl::doesDeclarationForceExternallyVisibleDefinition() const {
3143 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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 3144, __PRETTY_FUNCTION__))
3144 "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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 3144, __PRETTY_FUNCTION__))
;
3145
3146 ASTContext &Context = getASTContext();
3147
3148 if (Context.getLangOpts().MSVCCompat) {
3149 const FunctionDecl *Definition;
3150 if (hasBody(Definition) && Definition->isInlined() &&
3151 redeclForcesDefMSVC(this))
3152 return true;
3153 }
3154
3155 if (Context.getLangOpts().GNUInline || hasAttr<GNUInlineAttr>()) {
3156 // With GNU inlining, a declaration with 'inline' but not 'extern', forces
3157 // an externally visible definition.
3158 //
3159 // FIXME: What happens if gnu_inline gets added on after the first
3160 // declaration?
3161 if (!isInlineSpecified() || getStorageClass() == SC_Extern)
3162 return false;
3163
3164 const FunctionDecl *Prev = this;
3165 bool FoundBody = false;
3166 while ((Prev = Prev->getPreviousDecl())) {
3167 FoundBody |= Prev->Body.isValid();
3168
3169 if (Prev->Body) {
3170 // If it's not the case that both 'inline' and 'extern' are
3171 // specified on the definition, then it is always externally visible.
3172 if (!Prev->isInlineSpecified() ||
3173 Prev->getStorageClass() != SC_Extern)
3174 return false;
3175 } else if (Prev->isInlineSpecified() &&
3176 Prev->getStorageClass() != SC_Extern) {
3177 return false;
3178 }
3179 }
3180 return FoundBody;
3181 }
3182
3183 if (Context.getLangOpts().CPlusPlus)
3184 return false;
3185
3186 // C99 6.7.4p6:
3187 // [...] If all of the file scope declarations for a function in a
3188 // translation unit include the inline function specifier without extern,
3189 // then the definition in that translation unit is an inline definition.
3190 if (isInlineSpecified() && getStorageClass() != SC_Extern)
3191 return false;
3192 const FunctionDecl *Prev = this;
3193 bool FoundBody = false;
3194 while ((Prev = Prev->getPreviousDecl())) {
3195 FoundBody |= Prev->Body.isValid();
3196 if (RedeclForcesDefC99(Prev))
3197 return false;
3198 }
3199 return FoundBody;
3200}
3201
3202SourceRange FunctionDecl::getReturnTypeSourceRange() const {
3203 const TypeSourceInfo *TSI = getTypeSourceInfo();
3204 if (!TSI)
3205 return SourceRange();
3206 FunctionTypeLoc FTL =
3207 TSI->getTypeLoc().IgnoreParens().getAs<FunctionTypeLoc>();
3208 if (!FTL)
3209 return SourceRange();
3210
3211 // Skip self-referential return types.
3212 const SourceManager &SM = getASTContext().getSourceManager();
3213 SourceRange RTRange = FTL.getReturnLoc().getSourceRange();
3214 SourceLocation Boundary = getNameInfo().getBeginLoc();
3215 if (RTRange.isInvalid() || Boundary.isInvalid() ||
3216 !SM.isBeforeInTranslationUnit(RTRange.getEnd(), Boundary))
3217 return SourceRange();
3218
3219 return RTRange;
3220}
3221
3222SourceRange FunctionDecl::getExceptionSpecSourceRange() const {
3223 const TypeSourceInfo *TSI = getTypeSourceInfo();
3224 if (!TSI)
3225 return SourceRange();
3226 FunctionTypeLoc FTL =
3227 TSI->getTypeLoc().IgnoreParens().getAs<FunctionTypeLoc>();
3228 if (!FTL)
3229 return SourceRange();
3230
3231 return FTL.getExceptionSpecRange();
3232}
3233
3234const Attr *FunctionDecl::getUnusedResultAttr() const {
3235 QualType RetType = getReturnType();
3236 if (const auto *Ret = RetType->getAsRecordDecl()) {
3237 if (const auto *R = Ret->getAttr<WarnUnusedResultAttr>())
3238 return R;
3239 } else if (const auto *ET = RetType->getAs<EnumType>()) {
3240 if (const EnumDecl *ED = ET->getDecl()) {
3241 if (const auto *R = ED->getAttr<WarnUnusedResultAttr>())
3242 return R;
3243 }
3244 }
3245 return getAttr<WarnUnusedResultAttr>();
3246}
3247
3248/// For an inline function definition in C, or for a gnu_inline function
3249/// in C++, determine whether the definition will be externally visible.
3250///
3251/// Inline function definitions are always available for inlining optimizations.
3252/// However, depending on the language dialect, declaration specifiers, and
3253/// attributes, the definition of an inline function may or may not be
3254/// "externally" visible to other translation units in the program.
3255///
3256/// In C99, inline definitions are not externally visible by default. However,
3257/// if even one of the global-scope declarations is marked "extern inline", the
3258/// inline definition becomes externally visible (C99 6.7.4p6).
3259///
3260/// In GNU89 mode, or if the gnu_inline attribute is attached to the function
3261/// definition, we use the GNU semantics for inline, which are nearly the
3262/// opposite of C99 semantics. In particular, "inline" by itself will create
3263/// an externally visible symbol, but "extern inline" will not create an
3264/// externally visible symbol.
3265bool FunctionDecl::isInlineDefinitionExternallyVisible() const {
3266 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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 3267, __PRETTY_FUNCTION__))
3267 "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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 3267, __PRETTY_FUNCTION__))
;
3268 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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 3268, __PRETTY_FUNCTION__))
;
3269 ASTContext &Context = getASTContext();
3270
3271 if (Context.getLangOpts().GNUInline || hasAttr<GNUInlineAttr>()) {
3272 // Note: If you change the logic here, please change
3273 // doesDeclarationForceExternallyVisibleDefinition as well.
3274 //
3275 // If it's not the case that both 'inline' and 'extern' are
3276 // specified on the definition, then this inline definition is
3277 // externally visible.
3278 if (!(isInlineSpecified() && getStorageClass() == SC_Extern))
3279 return true;
3280
3281 // If any declaration is 'inline' but not 'extern', then this definition
3282 // is externally visible.
3283 for (auto Redecl : redecls()) {
3284 if (Redecl->isInlineSpecified() &&
3285 Redecl->getStorageClass() != SC_Extern)
3286 return true;
3287 }
3288
3289 return false;
3290 }
3291
3292 // The rest of this function is C-only.
3293 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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 3294, __PRETTY_FUNCTION__))
3294 "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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 3294, __PRETTY_FUNCTION__))
;
3295
3296 // C99 6.7.4p6:
3297 // [...] If all of the file scope declarations for a function in a
3298 // translation unit include the inline function specifier without extern,
3299 // then the definition in that translation unit is an inline definition.
3300 for (auto Redecl : redecls()) {
3301 if (RedeclForcesDefC99(Redecl))
3302 return true;
3303 }
3304
3305 // C99 6.7.4p6:
3306 // An inline definition does not provide an external definition for the
3307 // function, and does not forbid an external definition in another
3308 // translation unit.
3309 return false;
3310}
3311
3312/// getOverloadedOperator - Which C++ overloaded operator this
3313/// function represents, if any.
3314OverloadedOperatorKind FunctionDecl::getOverloadedOperator() const {
3315 if (getDeclName().getNameKind() == DeclarationName::CXXOperatorName)
3316 return getDeclName().getCXXOverloadedOperator();
3317 else
3318 return OO_None;
3319}
3320
3321/// getLiteralIdentifier - The literal suffix identifier this function
3322/// represents, if any.
3323const IdentifierInfo *FunctionDecl::getLiteralIdentifier() const {
3324 if (getDeclName().getNameKind() == DeclarationName::CXXLiteralOperatorName)
3325 return getDeclName().getCXXLiteralIdentifier();
3326 else
3327 return nullptr;
3328}
3329
3330FunctionDecl::TemplatedKind FunctionDecl::getTemplatedKind() const {
3331 if (TemplateOrSpecialization.isNull())
3332 return TK_NonTemplate;
3333 if (TemplateOrSpecialization.is<FunctionTemplateDecl *>())
3334 return TK_FunctionTemplate;
3335 if (TemplateOrSpecialization.is<MemberSpecializationInfo *>())
3336 return TK_MemberSpecialization;
3337 if (TemplateOrSpecialization.is<FunctionTemplateSpecializationInfo *>())
3338 return TK_FunctionTemplateSpecialization;
3339 if (TemplateOrSpecialization.is
3340 <DependentFunctionTemplateSpecializationInfo*>())
3341 return TK_DependentFunctionTemplateSpecialization;
3342
3343 llvm_unreachable("Did we miss a TemplateOrSpecialization type?")::llvm::llvm_unreachable_internal("Did we miss a TemplateOrSpecialization type?"
, "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 3343)
;
3344}
3345
3346FunctionDecl *FunctionDecl::getInstantiatedFromMemberFunction() const {
3347 if (MemberSpecializationInfo *Info = getMemberSpecializationInfo())
3348 return cast<FunctionDecl>(Info->getInstantiatedFrom());
3349
3350 return nullptr;
3351}
3352
3353MemberSpecializationInfo *FunctionDecl::getMemberSpecializationInfo() const {
3354 return TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo *>();
3355}
3356
3357void
3358FunctionDecl::setInstantiationOfMemberFunction(ASTContext &C,
3359 FunctionDecl *FD,
3360 TemplateSpecializationKind TSK) {
3361 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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 3362, __PRETTY_FUNCTION__))
3362 "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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 3362, __PRETTY_FUNCTION__))
;
3363 MemberSpecializationInfo *Info
3364 = new (C) MemberSpecializationInfo(FD, TSK);
3365 TemplateOrSpecialization = Info;
3366}
3367
3368FunctionTemplateDecl *FunctionDecl::getDescribedFunctionTemplate() const {
3369 return TemplateOrSpecialization.dyn_cast<FunctionTemplateDecl *>();
3370}
3371
3372void FunctionDecl::setDescribedFunctionTemplate(FunctionTemplateDecl *Template) {
3373 TemplateOrSpecialization = Template;
3374}
3375
3376bool FunctionDecl::isImplicitlyInstantiable() const {
3377 // If the function is invalid, it can't be implicitly instantiated.
3378 if (isInvalidDecl())
3379 return false;
3380
3381 switch (getTemplateSpecializationKind()) {
3382 case TSK_Undeclared:
3383 case TSK_ExplicitInstantiationDefinition:
3384 return false;
3385
3386 case TSK_ImplicitInstantiation:
3387 return true;
3388
3389 // It is possible to instantiate TSK_ExplicitSpecialization kind
3390 // if the FunctionDecl has a class scope specialization pattern.
3391 case TSK_ExplicitSpecialization:
3392 return getClassScopeSpecializationPattern() != nullptr;
3393
3394 case TSK_ExplicitInstantiationDeclaration:
3395 // Handled below.
3396 break;
3397 }
3398
3399 // Find the actual template from which we will instantiate.
3400 const FunctionDecl *PatternDecl = getTemplateInstantiationPattern();
3401 bool HasPattern = false;
3402 if (PatternDecl)
3403 HasPattern = PatternDecl->hasBody(PatternDecl);
3404
3405 // C++0x [temp.explicit]p9:
3406 // Except for inline functions, other explicit instantiation declarations
3407 // have the effect of suppressing the implicit instantiation of the entity
3408 // to which they refer.
3409 if (!HasPattern || !PatternDecl)
3410 return true;
3411
3412 return PatternDecl->isInlined();
3413}
3414
3415bool FunctionDecl::isTemplateInstantiation() const {
3416 switch (getTemplateSpecializationKind()) {
3417 case TSK_Undeclared:
3418 case TSK_ExplicitSpecialization:
3419 return false;
3420 case TSK_ImplicitInstantiation:
3421 case TSK_ExplicitInstantiationDeclaration:
3422 case TSK_ExplicitInstantiationDefinition:
3423 return true;
3424 }
3425 llvm_unreachable("All TSK values handled.")::llvm::llvm_unreachable_internal("All TSK values handled.", "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 3425)
;
3426}
3427
3428FunctionDecl *FunctionDecl::getTemplateInstantiationPattern() const {
3429 // Handle class scope explicit specialization special case.
3430 if (getTemplateSpecializationKind() == TSK_ExplicitSpecialization) {
3431 if (auto *Spec = getClassScopeSpecializationPattern())
3432 return getDefinitionOrSelf(Spec);
3433 return nullptr;
3434 }
3435
3436 // If this is a generic lambda call operator specialization, its
3437 // instantiation pattern is always its primary template's pattern
3438 // even if its primary template was instantiated from another
3439 // member template (which happens with nested generic lambdas).
3440 // Since a lambda's call operator's body is transformed eagerly,
3441 // we don't have to go hunting for a prototype definition template
3442 // (i.e. instantiated-from-member-template) to use as an instantiation
3443 // pattern.
3444
3445 if (isGenericLambdaCallOperatorSpecialization(
3446 dyn_cast<CXXMethodDecl>(this))) {
3447 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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 3447, __PRETTY_FUNCTION__))
;
3448 return getDefinitionOrSelf(getPrimaryTemplate()->getTemplatedDecl());
3449 }
3450
3451 if (FunctionTemplateDecl *Primary = getPrimaryTemplate()) {
3452 while (Primary->getInstantiatedFromMemberTemplate()) {
3453 // If we have hit a point where the user provided a specialization of
3454 // this template, we're done looking.
3455 if (Primary->isMemberSpecialization())
3456 break;
3457 Primary = Primary->getInstantiatedFromMemberTemplate();
3458 }
3459
3460 return getDefinitionOrSelf(Primary->getTemplatedDecl());
3461 }
3462
3463 if (auto *MFD = getInstantiatedFromMemberFunction())
3464 return getDefinitionOrSelf(MFD);
3465
3466 return nullptr;
3467}
3468
3469FunctionTemplateDecl *FunctionDecl::getPrimaryTemplate() const {
3470 if (FunctionTemplateSpecializationInfo *Info
3471 = TemplateOrSpecialization
3472 .dyn_cast<FunctionTemplateSpecializationInfo*>()) {
3473 return Info->Template.getPointer();
3474 }
3475 return nullptr;
3476}
3477
3478FunctionDecl *FunctionDecl::getClassScopeSpecializationPattern() const {
3479 return getASTContext().getClassScopeSpecializationPattern(this);
3480}
3481
3482FunctionTemplateSpecializationInfo *
3483FunctionDecl::getTemplateSpecializationInfo() const {
3484 return TemplateOrSpecialization
3485 .dyn_cast<FunctionTemplateSpecializationInfo *>();
3486}
3487
3488const TemplateArgumentList *
3489FunctionDecl::getTemplateSpecializationArgs() const {
3490 if (FunctionTemplateSpecializationInfo *Info
3491 = TemplateOrSpecialization
3492 .dyn_cast<FunctionTemplateSpecializationInfo*>()) {
3493 return Info->TemplateArguments;
3494 }
3495 return nullptr;
3496}
3497
3498const ASTTemplateArgumentListInfo *
3499FunctionDecl::getTemplateSpecializationArgsAsWritten() const {
3500 if (FunctionTemplateSpecializationInfo *Info
3501 = TemplateOrSpecialization
3502 .dyn_cast<FunctionTemplateSpecializationInfo*>()) {
3503 return Info->TemplateArgumentsAsWritten;
3504 }
3505 return nullptr;
3506}
3507
3508void
3509FunctionDecl::setFunctionTemplateSpecialization(ASTContext &C,
3510 FunctionTemplateDecl *Template,
3511 const TemplateArgumentList *TemplateArgs,
3512 void *InsertPos,
3513 TemplateSpecializationKind TSK,
3514 const TemplateArgumentListInfo *TemplateArgsAsWritten,
3515 SourceLocation PointOfInstantiation) {
3516 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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 3517, __PRETTY_FUNCTION__))
3517 "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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 3517, __PRETTY_FUNCTION__))
;
3518 FunctionTemplateSpecializationInfo *Info
3519 = TemplateOrSpecialization.dyn_cast<FunctionTemplateSpecializationInfo*>();
3520 if (!Info)
3521 Info = FunctionTemplateSpecializationInfo::Create(C, this, Template, TSK,
3522 TemplateArgs,
3523 TemplateArgsAsWritten,
3524 PointOfInstantiation);
3525 TemplateOrSpecialization = Info;
3526 Template->addSpecialization(Info, InsertPos);
3527}
3528
3529void
3530FunctionDecl::setDependentTemplateSpecialization(ASTContext &Context,
3531 const UnresolvedSetImpl &Templates,
3532 const TemplateArgumentListInfo &TemplateArgs) {
3533 assert(TemplateOrSpecialization.isNull())((TemplateOrSpecialization.isNull()) ? static_cast<void>
(0) : __assert_fail ("TemplateOrSpecialization.isNull()", "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 3533, __PRETTY_FUNCTION__))
;
3534 DependentFunctionTemplateSpecializationInfo *Info =
3535 DependentFunctionTemplateSpecializationInfo::Create(Context, Templates,
3536 TemplateArgs);
3537 TemplateOrSpecialization = Info;
3538}
3539
3540DependentFunctionTemplateSpecializationInfo *
3541FunctionDecl::getDependentSpecializationInfo() const {
3542 return TemplateOrSpecialization
3543 .dyn_cast<DependentFunctionTemplateSpecializationInfo *>();
3544}
3545
3546DependentFunctionTemplateSpecializationInfo *
3547DependentFunctionTemplateSpecializationInfo::Create(
3548 ASTContext &Context, const UnresolvedSetImpl &Ts,
3549 const TemplateArgumentListInfo &TArgs) {
3550 void *Buffer = Context.Allocate(
3551 totalSizeToAlloc<TemplateArgumentLoc, FunctionTemplateDecl *>(
3552 TArgs.size(), Ts.size()));
3553 return new (Buffer) DependentFunctionTemplateSpecializationInfo(Ts, TArgs);
3554}
3555
3556DependentFunctionTemplateSpecializationInfo::
3557DependentFunctionTemplateSpecializationInfo(const UnresolvedSetImpl &Ts,
3558 const TemplateArgumentListInfo &TArgs)
3559 : AngleLocs(TArgs.getLAngleLoc(), TArgs.getRAngleLoc()) {
3560 NumTemplates = Ts.size();
3561 NumArgs = TArgs.size();
3562
3563 FunctionTemplateDecl **TsArray = getTrailingObjects<FunctionTemplateDecl *>();
3564 for (unsigned I = 0, E = Ts.size(); I != E; ++I)
3565 TsArray[I] = cast<FunctionTemplateDecl>(Ts[I]->getUnderlyingDecl());
3566
3567 TemplateArgumentLoc *ArgsArray = getTrailingObjects<TemplateArgumentLoc>();
3568 for (unsigned I = 0, E = TArgs.size(); I != E; ++I)
3569 new (&ArgsArray[I]) TemplateArgumentLoc(TArgs[I]);
3570}
3571
3572TemplateSpecializationKind FunctionDecl::getTemplateSpecializationKind() const {
3573 // For a function template specialization, query the specialization
3574 // information object.
3575 FunctionTemplateSpecializationInfo *FTSInfo
3576 = TemplateOrSpecialization.dyn_cast<FunctionTemplateSpecializationInfo*>();
3577 if (FTSInfo)
3578 return FTSInfo->getTemplateSpecializationKind();
3579
3580 MemberSpecializationInfo *MSInfo
3581 = TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo*>();
3582 if (MSInfo)
3583 return MSInfo->getTemplateSpecializationKind();
3584
3585 return TSK_Undeclared;
3586}
3587
3588void
3589FunctionDecl::setTemplateSpecializationKind(TemplateSpecializationKind TSK,
3590 SourceLocation PointOfInstantiation) {
3591 if (FunctionTemplateSpecializationInfo *FTSInfo
3592 = TemplateOrSpecialization.dyn_cast<
3593 FunctionTemplateSpecializationInfo*>()) {
3594 FTSInfo->setTemplateSpecializationKind(TSK);
3595 if (TSK != TSK_ExplicitSpecialization &&
3596 PointOfInstantiation.isValid() &&
3597 FTSInfo->getPointOfInstantiation().isInvalid()) {
3598 FTSInfo->setPointOfInstantiation(PointOfInstantiation);
3599 if (ASTMutationListener *L = getASTContext().getASTMutationListener())
3600 L->InstantiationRequested(this);
3601 }
3602 } else if (MemberSpecializationInfo *MSInfo
3603 = TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo*>()) {
3604 MSInfo->setTemplateSpecializationKind(TSK);
3605 if (TSK != TSK_ExplicitSpecialization &&
3606 PointOfInstantiation.isValid() &&
3607 MSInfo->getPointOfInstantiation().isInvalid()) {
3608 MSInfo->setPointOfInstantiation(PointOfInstantiation);
3609 if (ASTMutationListener *L = getASTContext().getASTMutationListener())
3610 L->InstantiationRequested(this);
3611 }
3612 } else
3613 llvm_unreachable("Function cannot have a template specialization kind")::llvm::llvm_unreachable_internal("Function cannot have a template specialization kind"
, "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 3613)
;
3614}
3615
3616SourceLocation FunctionDecl::getPointOfInstantiation() const {
3617 if (FunctionTemplateSpecializationInfo *FTSInfo
3618 = TemplateOrSpecialization.dyn_cast<
3619 FunctionTemplateSpecializationInfo*>())
3620 return FTSInfo->getPointOfInstantiation();
3621 else if (MemberSpecializationInfo *MSInfo
3622 = TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo*>())
3623 return MSInfo->getPointOfInstantiation();
3624
3625 return SourceLocation();
3626}
3627
3628bool FunctionDecl::isOutOfLine() const {
3629 if (Decl::isOutOfLine())
3630 return true;
3631
3632 // If this function was instantiated from a member function of a
3633 // class template, check whether that member function was defined out-of-line.
3634 if (FunctionDecl *FD = getInstantiatedFromMemberFunction()) {
3635 const FunctionDecl *Definition;
3636 if (FD->hasBody(Definition))
3637 return Definition->isOutOfLine();
3638 }
3639
3640 // If this function was instantiated from a function template,
3641 // check whether that function template was defined out-of-line.
3642 if (FunctionTemplateDecl *FunTmpl = getPrimaryTemplate()) {
3643 const FunctionDecl *Definition;
3644 if (FunTmpl->getTemplatedDecl()->hasBody(Definition))
3645 return Definition->isOutOfLine();
3646 }
3647
3648 return false;
3649}
3650
3651SourceRange FunctionDecl::getSourceRange() const {
3652 return SourceRange(getOuterLocStart(), EndRangeLoc);
3653}
3654
3655unsigned FunctionDecl::getMemoryFunctionKind() const {
3656 IdentifierInfo *FnInfo = getIdentifier();
3657
3658 if (!FnInfo)
3659 return 0;
3660
3661 // Builtin handling.
3662 switch (getBuiltinID()) {
3663 case Builtin::BI__builtin_memset:
3664 case Builtin::BI__builtin___memset_chk:
3665 case Builtin::BImemset:
3666 return Builtin::BImemset;
3667
3668 case Builtin::BI__builtin_memcpy:
3669 case Builtin::BI__builtin___memcpy_chk:
3670 case Builtin::BImemcpy:
3671 return Builtin::BImemcpy;
3672
3673 case Builtin::BI__builtin_memmove:
3674 case Builtin::BI__builtin___memmove_chk:
3675 case Builtin::BImemmove:
3676 return Builtin::BImemmove;
3677
3678// case Builtin::BIstrlcpy:
3679// case Builtin::BI__builtin___strlcpy_chk:
3680// return Builtin::BIstrlcpy;
3681
3682// case Builtin::BIstrlcat:
3683// case Builtin::BI__builtin___strlcat_chk:
3684// return Builtin::BIstrlcat;
3685
3686 case Builtin::BI__builtin_memcmp:
3687 case Builtin::BImemcmp:
3688 return Builtin::BImemcmp;
3689
3690 case Builtin::BI__builtin_strncpy:
3691 case Builtin::BI__builtin___strncpy_chk:
3692 case Builtin::BIstrncpy:
3693 return Builtin::BIstrncpy;
3694
3695 case Builtin::BI__builtin_strncmp:
3696 case Builtin::BIstrncmp:
3697 return Builtin::BIstrncmp;
3698
3699 case Builtin::BI__builtin_strncasecmp:
3700 case Builtin::BIstrncasecmp:
3701 return Builtin::BIstrncasecmp;
3702
3703 case Builtin::BI__builtin_strncat:
3704 case Builtin::BI__builtin___strncat_chk:
3705 case Builtin::BIstrncat:
3706 return Builtin::BIstrncat;
3707
3708 case Builtin::BI__builtin_strndup:
3709 case Builtin::BIstrndup:
3710 return Builtin::BIstrndup;
3711
3712 case Builtin::BI__builtin_strlen:
3713 case Builtin::BIstrlen:
3714 return Builtin::BIstrlen;
3715
3716 case Builtin::BI__builtin_bzero:
3717 case Builtin::BIbzero:
3718 return Builtin::BIbzero;
3719
3720 default:
3721 if (isExternC()) {
3722 if (FnInfo->isStr("memset"))
3723 return Builtin::BImemset;
3724 else if (FnInfo->isStr("memcpy"))
3725 return Builtin::BImemcpy;
3726 else if (FnInfo->isStr("memmove"))
3727 return Builtin::BImemmove;
3728 else if (FnInfo->isStr("memcmp"))
3729 return Builtin::BImemcmp;
3730 else if (FnInfo->isStr("strncpy"))
3731 return Builtin::BIstrncpy;
3732 else if (FnInfo->isStr("strncmp"))
3733 return Builtin::BIstrncmp;
3734 else if (FnInfo->isStr("strncasecmp"))
3735 return Builtin::BIstrncasecmp;
3736 else if (FnInfo->isStr("strncat"))
3737 return Builtin::BIstrncat;
3738 else if (FnInfo->isStr("strndup"))
3739 return Builtin::BIstrndup;
3740 else if (FnInfo->isStr("strlen"))
3741 return Builtin::BIstrlen;
3742 else if (FnInfo->isStr("bzero"))
3743 return Builtin::BIbzero;
3744 }
3745 break;
3746 }
3747 return 0;
3748}
3749
3750unsigned FunctionDecl::getODRHash() const {
3751 assert(hasODRHash())((hasODRHash()) ? static_cast<void> (0) : __assert_fail
("hasODRHash()", "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 3751, __PRETTY_FUNCTION__))
;
3752 return ODRHash;
3753}
3754
3755unsigned FunctionDecl::getODRHash() {
3756 if (hasODRHash())
3757 return ODRHash;
3758
3759 if (auto *FT = getInstantiatedFromMemberFunction()) {
3760 setHasODRHash(true);
3761 ODRHash = FT->getODRHash();
3762 return ODRHash;
3763 }
3764
3765 class ODRHash Hash;
3766 Hash.AddFunctionDecl(this);
3767 setHasODRHash(true);
3768 ODRHash = Hash.CalculateHash();
3769 return ODRHash;
3770}
3771
3772//===----------------------------------------------------------------------===//
3773// FieldDecl Implementation
3774//===----------------------------------------------------------------------===//
3775
3776FieldDecl *FieldDecl::Create(const ASTContext &C, DeclContext *DC,
3777 SourceLocation StartLoc, SourceLocation IdLoc,
3778 IdentifierInfo *Id, QualType T,
3779 TypeSourceInfo *TInfo, Expr *BW, bool Mutable,
3780 InClassInitStyle InitStyle) {
3781 return new (C, DC) FieldDecl(Decl::Field, DC, StartLoc, IdLoc, Id, T, TInfo,
3782 BW, Mutable, InitStyle);
3783}
3784
3785FieldDecl *FieldDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
3786 return new (C, ID) FieldDecl(Field, nullptr, SourceLocation(),
3787 SourceLocation(), nullptr, QualType(), nullptr,
3788 nullptr, false, ICIS_NoInit);
3789}
3790
3791bool FieldDecl::isAnonymousStructOrUnion() const {
3792 if (!isImplicit() || getDeclName())
3793 return false;
3794
3795 if (const auto *Record = getType()->getAs<RecordType>())
3796 return Record->getDecl()->isAnonymousStructOrUnion();
3797
3798 return false;
3799}
3800
3801unsigned FieldDecl::getBitWidthValue(const ASTContext &Ctx) const {
3802 assert(isBitField() && "not a bitfield")((isBitField() && "not a bitfield") ? static_cast<
void> (0) : __assert_fail ("isBitField() && \"not a bitfield\""
, "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 3802, __PRETTY_FUNCTION__))
;
3803 return getBitWidth()->EvaluateKnownConstInt(Ctx).getZExtValue();
3804}
3805
3806bool FieldDecl::isZeroLengthBitField(const ASTContext &Ctx) const {
3807 return isUnnamedBitfield() && !getBitWidth()->isValueDependent() &&
3808 getBitWidthValue(Ctx) == 0;
3809}
3810
3811unsigned FieldDecl::getFieldIndex() const {
3812 const FieldDecl *Canonical = getCanonicalDecl();
3813 if (Canonical != this)
3814 return Canonical->getFieldIndex();
3815
3816 if (CachedFieldIndex) return CachedFieldIndex - 1;
3817
3818 unsigned Index = 0;
3819 const RecordDecl *RD = getParent()->getDefinition();
3820 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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 3820, __PRETTY_FUNCTION__))
;
3821
3822 for (auto *Field : RD->fields()) {
3823 Field->getCanonicalDecl()->CachedFieldIndex = Index + 1;
3824 ++Index;
3825 }
3826
3827 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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 3827, __PRETTY_FUNCTION__))
;
3828 return CachedFieldIndex - 1;
3829}
3830
3831SourceRange FieldDecl::getSourceRange() const {
3832 const Expr *FinalExpr = getInClassInitializer();
3833 if (!FinalExpr)
3834 FinalExpr = getBitWidth();
3835 if (FinalExpr)
3836 return SourceRange(getInnerLocStart(), FinalExpr->getEndLoc());
3837 return DeclaratorDecl::getSourceRange();
3838}
3839
3840void FieldDecl::setCapturedVLAType(const VariableArrayType *VLAType) {
3841 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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 3842, __PRETTY_FUNCTION__))
3842 "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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 3842, __PRETTY_FUNCTION__))
;
3843 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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 3845, __PRETTY_FUNCTION__))
3844 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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 3845, __PRETTY_FUNCTION__))
3845 "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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 3845, __PRETTY_FUNCTION__))
;
3846 InitStorage.setPointerAndInt(const_cast<VariableArrayType *>(VLAType),
3847 ISK_CapturedVLAType);
3848}
3849
3850//===----------------------------------------------------------------------===//
3851// TagDecl Implementation
3852//===----------------------------------------------------------------------===//
3853
3854TagDecl::TagDecl(Kind DK, TagKind TK, const ASTContext &C, DeclContext *DC,
3855 SourceLocation L, IdentifierInfo *Id, TagDecl *PrevDecl,
3856 SourceLocation StartL)
3857 : TypeDecl(DK, DC, L, Id, StartL), DeclContext(DK), redeclarable_base(C),
3858 TypedefNameDeclOrQualifier((TypedefNameDecl *)nullptr) {
3859 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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 3860, __PRETTY_FUNCTION__))
3860 "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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 3860, __PRETTY_FUNCTION__))
;
3861 setPreviousDecl(PrevDecl);
3862 setTagKind(TK);
3863 setCompleteDefinition(false);
3864 setBeingDefined(false);
3865 setEmbeddedInDeclarator(false);
3866 setFreeStanding(false);
3867 setCompleteDefinitionRequired(false);
3868}
3869
3870SourceLocation TagDecl::getOuterLocStart() const {
3871 return getTemplateOrInnerLocStart(this);
3872}
3873
3874SourceRange TagDecl::getSourceRange() const {
3875 SourceLocation RBraceLoc = BraceRange.getEnd();
3876 SourceLocation E = RBraceLoc.isValid() ? RBraceLoc : getLocation();
3877 return SourceRange(getOuterLocStart(), E);
3878}
3879
3880TagDecl *TagDecl::getCanonicalDecl() { return getFirstDecl(); }
3881
3882void TagDecl::setTypedefNameForAnonDecl(TypedefNameDecl *TDD) {
3883 TypedefNameDeclOrQualifier = TDD;
3884 if (const Type *T = getTypeForDecl()) {
3885 (void)T;
3886 assert(T->isLinkageValid())((T->isLinkageValid()) ? static_cast<void> (0) : __assert_fail
("T->isLinkageValid()", "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 3886, __PRETTY_FUNCTION__))
;
3887 }
3888 assert(isLinkageValid())((isLinkageValid()) ? static_cast<void> (0) : __assert_fail
("isLinkageValid()", "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 3888, __PRETTY_FUNCTION__))
;
3889}
3890
3891void TagDecl::startDefinition() {
3892 setBeingDefined(true);
3893
3894 if (auto *D = dyn_cast<CXXRecordDecl>(this)) {
3895 struct CXXRecordDecl::DefinitionData *Data =
3896 new (getASTContext()) struct CXXRecordDecl::DefinitionData(D);
3897 for (auto I : redecls())
3898 cast<CXXRecordDecl>(I)->DefinitionData = Data;
3899 }
3900}
3901
3902void TagDecl::completeDefinition() {
3903 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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 3905, __PRETTY_FUNCTION__))
3904 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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 3905, __PRETTY_FUNCTION__))
3905 "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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 3905, __PRETTY_FUNCTION__))
;
3906
3907 setCompleteDefinition(true);
3908 setBeingDefined(false);
3909
3910 if (ASTMutationListener *L = getASTMutationListener())
3911 L->CompletedTagDefinition(this);
3912}
3913
3914TagDecl *TagDecl::getDefinition() const {
3915 if (isCompleteDefinition())
3916 return const_cast<TagDecl *>(this);
3917
3918 // If it's possible for us to have an out-of-date definition, check now.
3919 if (mayHaveOutOfDateDef()) {
3920 if (IdentifierInfo *II = getIdentifier()) {
3921 if (II->isOutOfDate()) {
3922 updateOutOfDate(*II);
3923 }
3924 }
3925 }
3926
3927 if (const auto *CXXRD = dyn_cast<CXXRecordDecl>(this))
3928 return CXXRD->getDefinition();
3929
3930 for (auto R : redecls())
3931 if (R->isCompleteDefinition())
3932 return R;
3933
3934 return nullptr;
3935}
3936
3937void TagDecl::setQualifierInfo(NestedNameSpecifierLoc QualifierLoc) {
3938 if (QualifierLoc) {
3939 // Make sure the extended qualifier info is allocated.
3940 if (!hasExtInfo())
3941 TypedefNameDeclOrQualifier = new (getASTContext()) ExtInfo;
3942 // Set qualifier info.
3943 getExtInfo()->QualifierLoc = QualifierLoc;
3944 } else {
3945 // Here Qualifier == 0, i.e., we are removing the qualifier (if any).
3946 if (hasExtInfo()) {
3947 if (getExtInfo()->NumTemplParamLists == 0) {
3948 getASTContext().Deallocate(getExtInfo());
3949 TypedefNameDeclOrQualifier = (TypedefNameDecl *)nullptr;
3950 }
3951 else
3952 getExtInfo()->QualifierLoc = QualifierLoc;
3953 }
3954 }
3955}
3956
3957void TagDecl::setTemplateParameterListsInfo(
3958 ASTContext &Context, ArrayRef<TemplateParameterList *> TPLists) {
3959 assert(!TPLists.empty())((!TPLists.empty()) ? static_cast<void> (0) : __assert_fail
("!TPLists.empty()", "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 3959, __PRETTY_FUNCTION__))
;
3960 // Make sure the extended decl info is allocated.
3961 if (!hasExtInfo())
3962 // Allocate external info struct.
3963 TypedefNameDeclOrQualifier = new (getASTContext()) ExtInfo;
3964 // Set the template parameter lists info.
3965 getExtInfo()->setTemplateParameterListsInfo(Context, TPLists);
3966}
3967
3968//===----------------------------------------------------------------------===//
3969// EnumDecl Implementation
3970//===----------------------------------------------------------------------===//
3971
3972EnumDecl::EnumDecl(ASTContext &C, DeclContext *DC, SourceLocation StartLoc,
3973 SourceLocation IdLoc, IdentifierInfo *Id, EnumDecl *PrevDecl,
3974 bool Scoped, bool ScopedUsingClassTag, bool Fixed)
3975 : TagDecl(Enum, TTK_Enum, C, DC, IdLoc, Id, PrevDecl, StartLoc) {
3976 assert(Scoped || !ScopedUsingClassTag)((Scoped || !ScopedUsingClassTag) ? static_cast<void> (
0) : __assert_fail ("Scoped || !ScopedUsingClassTag", "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 3976, __PRETTY_FUNCTION__))
;
3977 IntegerType = nullptr;
3978 setNumPositiveBits(0);
3979 setNumNegativeBits(0);
3980 setScoped(Scoped);
3981 setScopedUsingClassTag(ScopedUsingClassTag);
3982 setFixed(Fixed);
3983 setHasODRHash(false);
3984 ODRHash = 0;
3985}
3986
3987void EnumDecl::anchor() {}
3988
3989EnumDecl *EnumDecl::Create(ASTContext &C, DeclContext *DC,
3990 SourceLocation StartLoc, SourceLocation IdLoc,
3991 IdentifierInfo *Id,
3992 EnumDecl *PrevDecl, bool IsScoped,
3993 bool IsScopedUsingClassTag, bool IsFixed) {
3994 auto *Enum = new (C, DC) EnumDecl(C, DC, StartLoc, IdLoc, Id, PrevDecl,
3995 IsScoped, IsScopedUsingClassTag, IsFixed);
3996 Enum->setMayHaveOutOfDateDef(C.getLangOpts().Modules);
3997 C.getTypeDeclType(Enum, PrevDecl);
3998 return Enum;
3999}
4000
4001EnumDecl *EnumDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
4002 EnumDecl *Enum =
4003 new (C, ID) EnumDecl(C, nullptr, SourceLocation(), SourceLocation(),
4004 nullptr, nullptr, false, false, false);
4005 Enum->setMayHaveOutOfDateDef(C.getLangOpts().Modules);
4006 return Enum;
4007}
4008
4009SourceRange EnumDecl::getIntegerTypeRange() const {
4010 if (const TypeSourceInfo *TI = getIntegerTypeSourceInfo())
4011 return TI->getTypeLoc().getSourceRange();
4012 return SourceRange();
4013}
4014
4015void EnumDecl::completeDefinition(QualType NewType,
4016 QualType NewPromotionType,
4017 unsigned NumPositiveBits,
4018 unsigned NumNegativeBits) {
4019 assert(!isCompleteDefinition() && "Cannot redefine enums!")((!isCompleteDefinition() && "Cannot redefine enums!"
) ? static_cast<void> (0) : __assert_fail ("!isCompleteDefinition() && \"Cannot redefine enums!\""
, "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 4019, __PRETTY_FUNCTION__))
;
4020 if (!IntegerType)
4021 IntegerType = NewType.getTypePtr();
4022 PromotionType = NewPromotionType;
4023 setNumPositiveBits(NumPositiveBits);
4024 setNumNegativeBits(NumNegativeBits);
4025 TagDecl::completeDefinition();
4026}
4027
4028bool EnumDecl::isClosed() const {
4029 if (const auto *A = getAttr<EnumExtensibilityAttr>())
4030 return A->getExtensibility() == EnumExtensibilityAttr::Closed;
4031 return true;
4032}
4033
4034bool EnumDecl::isClosedFlag() const {
4035 return isClosed() && hasAttr<FlagEnumAttr>();
4036}
4037
4038bool EnumDecl::isClosedNonFlag() const {
4039 return isClosed() && !hasAttr<FlagEnumAttr>();
4040}
4041
4042TemplateSpecializationKind EnumDecl::getTemplateSpecializationKind() const {
4043 if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo())
4044 return MSI->getTemplateSpecializationKind();
4045
4046 return TSK_Undeclared;
4047}
4048
4049void EnumDecl::setTemplateSpecializationKind(TemplateSpecializationKind TSK,
4050 SourceLocation PointOfInstantiation) {
4051 MemberSpecializationInfo *MSI = getMemberSpecializationInfo();
4052 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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 4052, __PRETTY_FUNCTION__))
;
4053 MSI->setTemplateSpecializationKind(TSK);
4054 if (TSK != TSK_ExplicitSpecialization &&
4055 PointOfInstantiation.isValid() &&
4056 MSI->getPointOfInstantiation().isInvalid())
4057 MSI->setPointOfInstantiation(PointOfInstantiation);
4058}
4059
4060EnumDecl *EnumDecl::getTemplateInstantiationPattern() const {
4061 if (MemberSpecializationInfo *MSInfo = getMemberSpecializationInfo()) {
4062 if (isTemplateInstantiation(MSInfo->getTemplateSpecializationKind())) {
4063 EnumDecl *ED = getInstantiatedFromMemberEnum();
4064 while (auto *NewED = ED->getInstantiatedFromMemberEnum())
4065 ED = NewED;
4066 return getDefinitionOrSelf(ED);
4067 }
4068 }
4069
4070 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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 4071, __PRETTY_FUNCTION__))
4071 "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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 4071, __PRETTY_FUNCTION__))
;
4072 return nullptr;
4073}
4074
4075EnumDecl *EnumDecl::getInstantiatedFromMemberEnum() const {
4076 if (SpecializationInfo)
4077 return cast<EnumDecl>(SpecializationInfo->getInstantiatedFrom());
4078
4079 return nullptr;
4080}
4081
4082void EnumDecl::setInstantiationOfMemberEnum(ASTContext &C, EnumDecl *ED,
4083 TemplateSpecializationKind TSK) {
4084 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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 4084, __PRETTY_FUNCTION__))
;
4085 SpecializationInfo = new (C) MemberSpecializationInfo(ED, TSK);
4086}
4087
4088unsigned EnumDecl::getODRHash() {
4089 if (hasODRHash())
4090 return ODRHash;
4091
4092 class ODRHash Hash;
4093 Hash.AddEnumDecl(this);
4094 setHasODRHash(true);
4095 ODRHash = Hash.CalculateHash();
4096 return ODRHash;
4097}
4098
4099//===----------------------------------------------------------------------===//
4100// RecordDecl Implementation
4101//===----------------------------------------------------------------------===//
4102
4103RecordDecl::RecordDecl(Kind DK, TagKind TK, const ASTContext &C,
4104 DeclContext *DC, SourceLocation StartLoc,
4105 SourceLocation IdLoc, IdentifierInfo *Id,
4106 RecordDecl *PrevDecl)
4107 : TagDecl(DK, TK, C, DC, IdLoc, Id, PrevDecl, StartLoc) {
4108 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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 4108, __PRETTY_FUNCTION__))
;
4109 setHasFlexibleArrayMember(false);
4110 setAnonymousStructOrUnion(false);
4111 setHasObjectMember(false);
4112 setHasVolatileMember(false);
4113 setHasLoadedFieldsFromExternalStorage(false);
4114 setNonTrivialToPrimitiveDefaultInitialize(false);
4115 setNonTrivialToPrimitiveCopy(false);
4116 setNonTrivialToPrimitiveDestroy(false);
4117 setParamDestroyedInCallee(false);
4118 setArgPassingRestrictions(APK_CanPassInRegs);
4119}
4120
4121RecordDecl *RecordDecl::Create(const ASTContext &C, TagKind TK, DeclContext *DC,
4122 SourceLocation StartLoc, SourceLocation IdLoc,
4123 IdentifierInfo *Id, RecordDecl* PrevDecl) {
4124 RecordDecl *R = new (C, DC) RecordDecl(Record, TK, C, DC,
4125 StartLoc, IdLoc, Id, PrevDecl);
4126 R->setMayHaveOutOfDateDef(C.getLangOpts().Modules);
4127
4128 C.getTypeDeclType(R, PrevDecl);
4129 return R;
4130}
4131
4132RecordDecl *RecordDecl::CreateDeserialized(const ASTContext &C, unsigned ID) {
4133 RecordDecl *R =
4134 new (C, ID) RecordDecl(Record, TTK_Struct, C, nullptr, SourceLocation(),
4135 SourceLocation(), nullptr, nullptr);
4136 R->setMayHaveOutOfDateDef(C.getLangOpts().Modules);
4137 return R;
4138}
4139
4140bool RecordDecl::isInjectedClassName() const {
4141 return isImplicit() && getDeclName() && getDeclContext()->isRecord() &&
4142 cast<RecordDecl>(getDeclContext())->getDeclName() == getDeclName();
4143}
4144
4145bool RecordDecl::isLambda() const {
4146 if (auto RD = dyn_cast<CXXRecordDecl>(this))
4147 return RD->isLambda();
4148 return false;
4149}
4150
4151bool RecordDecl::isCapturedRecord() const {
4152 return hasAttr<CapturedRecordAttr>();
4153}
4154
4155void RecordDecl::setCapturedRecord() {
4156 addAttr(CapturedRecordAttr::CreateImplicit(getASTContext()));
4157}
4158
4159RecordDecl::field_iterator RecordDecl::field_begin() const {
4160 if (hasExternalLexicalStorage() && !hasLoadedFieldsFromExternalStorage())
4161 LoadFieldsFromExternalStorage();
4162
4163 return field_iterator(decl_iterator(FirstDecl));
4164}
4165
4166/// completeDefinition - Notes that the definition of this type is now
4167/// complete.
4168void RecordDecl::completeDefinition() {
4169 assert(!isCompleteDefinition() && "Cannot redefine record!")((!isCompleteDefinition() && "Cannot redefine record!"
) ? static_cast<void> (0) : __assert_fail ("!isCompleteDefinition() && \"Cannot redefine record!\""
, "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 4169, __PRETTY_FUNCTION__))
;
4170 TagDecl::completeDefinition();
4171}
4172
4173/// isMsStruct - Get whether or not this record uses ms_struct layout.
4174/// This which can be turned on with an attribute, pragma, or the
4175/// -mms-bitfields command-line option.
4176bool RecordDecl::isMsStruct(const ASTContext &C) const {
4177 return hasAttr<MSStructAttr>() || C.getLangOpts().MSBitfields == 1;
4178}
4179
4180void RecordDecl::LoadFieldsFromExternalStorage() const {
4181 ExternalASTSource *Source = getASTContext().getExternalSource();
4182 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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 4182, __PRETTY_FUNCTION__))
;
4183
4184 // Notify that we have a RecordDecl doing some initialization.
4185 ExternalASTSource::Deserializing TheFields(Source);
4186
4187 SmallVector<Decl*, 64> Decls;
4188 setHasLoadedFieldsFromExternalStorage(true);
4189 Source->FindExternalLexicalDecls(this, [](Decl::Kind K) {
4190 return FieldDecl::classofKind(K) || IndirectFieldDecl::classofKind(K);
4191 }, Decls);
4192
4193#ifndef NDEBUG
4194 // Check that all decls we got were FieldDecls.
4195 for (unsigned i=0, e=Decls.size(); i != e; ++i)
4196 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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 4196, __PRETTY_FUNCTION__))
;
4197#endif
4198
4199 if (Decls.empty())
4200 return;
4201
4202 std::tie(FirstDecl, LastDecl) = BuildDeclChain(Decls,
4203 /*FieldsAlreadyLoaded=*/false);
4204}
4205
4206bool RecordDecl::mayInsertExtraPadding(bool EmitRemark) const {
4207 ASTContext &Context = getASTContext();
4208 const SanitizerMask EnabledAsanMask = Context.getLangOpts().Sanitize.Mask &
4209 (SanitizerKind::Address | SanitizerKind::KernelAddress);
4210 if (!EnabledAsanMask || !Context.getLangOpts().SanitizeAddressFieldPadding)
4211 return false;
4212 const auto &Blacklist = Context.getSanitizerBlacklist();
4213 const auto *CXXRD = dyn_cast<CXXRecordDecl>(this);
4214 // We may be able to relax some of these requirements.
4215 int ReasonToReject = -1;
4216 if (!CXXRD || CXXRD->isExternCContext())
4217 ReasonToReject = 0; // is not C++.
4218 else if (CXXRD->hasAttr<PackedAttr>())
4219 ReasonToReject = 1; // is packed.
4220 else if (CXXRD->isUnion())
4221 ReasonToReject = 2; // is a union.
4222 else if (CXXRD->isTriviallyCopyable())
4223 ReasonToReject = 3; // is trivially copyable.
4224 else if (CXXRD->hasTrivialDestructor())
4225 ReasonToReject = 4; // has trivial destructor.
4226 else if (CXXRD->isStandardLayout())
4227 ReasonToReject = 5; // is standard layout.
4228 else if (Blacklist.isBlacklistedLocation(EnabledAsanMask, getLocation(),
4229 "field-padding"))
4230 ReasonToReject = 6; // is in a blacklisted file.
4231 else if (Blacklist.isBlacklistedType(EnabledAsanMask,
4232 getQualifiedNameAsString(),
4233 "field-padding"))
4234 ReasonToReject = 7; // is blacklisted.
4235
4236 if (EmitRemark) {
4237 if (ReasonToReject >= 0)
4238 Context.getDiagnostics().Report(
4239 getLocation(),
4240 diag::remark_sanitize_address_insert_extra_padding_rejected)
4241 << getQualifiedNameAsString() << ReasonToReject;
4242 else
4243 Context.getDiagnostics().Report(
4244 getLocation(),
4245 diag::remark_sanitize_address_insert_extra_padding_accepted)
4246 << getQualifiedNameAsString();
4247 }
4248 return ReasonToReject < 0;
4249}
4250
4251const FieldDecl *RecordDecl::findFirstNamedDataMember() const {
4252 for (const auto *I : fields()) {
4253 if (I->getIdentifier())
4254 return I;
4255
4256 if (const auto *RT = I->getType()->getAs<RecordType>())
4257 if (const FieldDecl *NamedDataMember =
4258 RT->getDecl()->findFirstNamedDataMember())
4259 return NamedDataMember;
4260 }
4261
4262 // We didn't find a named data member.
4263 return nullptr;
4264}
4265
4266//===----------------------------------------------------------------------===//
4267// BlockDecl Implementation
4268//===----------------------------------------------------------------------===//
4269
4270BlockDecl::BlockDecl(DeclContext *DC, SourceLocation CaretLoc)
4271 : Decl(Block, DC, CaretLoc), DeclContext(Block) {
4272 setIsVariadic(false);
4273 setCapturesCXXThis(false);
4274 setBlockMissingReturnType(true);
4275 setIsConversionFromLambda(false);
4276 setDoesNotEscape(false);
4277}
4278
4279void BlockDecl::setParams(ArrayRef<ParmVarDecl *> NewParamInfo) {
4280 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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 4280, __PRETTY_FUNCTION__))
;
4281
4282 // Zero params -> null pointer.
4283 if (!NewParamInfo.empty()) {
4284 NumParams = NewParamInfo.size();
4285 ParamInfo = new (getASTContext()) ParmVarDecl*[NewParamInfo.size()];
4286 std::copy(NewParamInfo.begin(), NewParamInfo.end(), ParamInfo);
4287 }
4288}
4289
4290void BlockDecl::setCaptures(ASTContext &Context, ArrayRef<Capture> Captures,
4291 bool CapturesCXXThis) {
4292 this->setCapturesCXXThis(CapturesCXXThis);
4293 this->NumCaptures = Captures.size();
4294
4295 if (Captures.empty()) {
4296 this->Captures = nullptr;
4297 return;
4298 }
4299
4300 this->Captures = Captures.copy(Context).data();
4301}
4302
4303bool BlockDecl::capturesVariable(const VarDecl *variable) const {
4304 for (const auto &I : captures())
4305 // Only auto vars can be captured, so no redeclaration worries.
4306 if (I.getVariable() == variable)
4307 return true;
4308
4309 return false;
4310}
4311
4312SourceRange BlockDecl::getSourceRange() const {
4313 return SourceRange(getLocation(), Body ? Body->getEndLoc() : getLocation());
4314}
4315
4316//===----------------------------------------------------------------------===//
4317// Other Decl Allocation/Deallocation Method Implementations
4318//===----------------------------------------------------------------------===//
4319
4320void TranslationUnitDecl::anchor() {}
4321
4322TranslationUnitDecl *TranslationUnitDecl::Create(ASTContext &C) {
4323 return new (C, (DeclContext *)nullptr) TranslationUnitDecl(C);
4324}
4325
4326void PragmaCommentDecl::anchor() {}
4327
4328PragmaCommentDecl *PragmaCommentDecl::Create(const ASTContext &C,
4329 TranslationUnitDecl *DC,
4330 SourceLocation CommentLoc,
4331 PragmaMSCommentKind CommentKind,
4332 StringRef Arg) {
4333 PragmaCommentDecl *PCD =
4334 new (C, DC, additionalSizeToAlloc<char>(Arg.size() + 1))
4335 PragmaCommentDecl(DC, CommentLoc, CommentKind);
4336 memcpy(PCD->getTrailingObjects<char>(), Arg.data(), Arg.size());
4337 PCD->getTrailingObjects<char>()[Arg.size()] = '\0';
4338 return PCD;
4339}
4340
4341PragmaCommentDecl *PragmaCommentDecl::CreateDeserialized(ASTContext &C,
4342 unsigned ID,
4343 unsigned ArgSize) {
4344 return new (C, ID, additionalSizeToAlloc<char>(ArgSize + 1))
4345 PragmaCommentDecl(nullptr, SourceLocation(), PCK_Unknown);
4346}
4347
4348void PragmaDetectMismatchDecl::anchor() {}
4349
4350PragmaDetectMismatchDecl *
4351PragmaDetectMismatchDecl::Create(const ASTContext &C, TranslationUnitDecl *DC,
4352 SourceLocation Loc, StringRef Name,
4353 StringRef Value) {
4354 size_t ValueStart = Name.size() + 1;
4355 PragmaDetectMismatchDecl *PDMD =
4356 new (C, DC, additionalSizeToAlloc<char>(ValueStart + Value.size() + 1))
4357 PragmaDetectMismatchDecl(DC, Loc, ValueStart);
4358 memcpy(PDMD->getTrailingObjects<char>(), Name.data(), Name.size());
4359 PDMD->getTrailingObjects<char>()[Name.size()] = '\0';
4360 memcpy(PDMD->getTrailingObjects<char>() + ValueStart, Value.data(),
4361 Value.size());
4362 PDMD->getTrailingObjects<char>()[ValueStart + Value.size()] = '\0';
4363 return PDMD;
4364}
4365
4366PragmaDetectMismatchDecl *
4367PragmaDetectMismatchDecl::CreateDeserialized(ASTContext &C, unsigned ID,
4368 unsigned NameValueSize) {
4369 return new (C, ID, additionalSizeToAlloc<char>(NameValueSize + 1))
4370 PragmaDetectMismatchDecl(nullptr, SourceLocation(), 0);
4371}
4372
4373void ExternCContextDecl::anchor() {}
4374
4375ExternCContextDecl *ExternCContextDecl::Create(const ASTContext &C,
4376 TranslationUnitDecl *DC) {
4377 return new (C, DC) ExternCContextDecl(DC);
4378}
4379
4380void LabelDecl::anchor() {}
4381
4382LabelDecl *LabelDecl::Create(ASTContext &C, DeclContext *DC,
4383 SourceLocation IdentL, IdentifierInfo *II) {
4384 return new (C, DC) LabelDecl(DC, IdentL, II, nullptr, IdentL);
4385}
4386
4387LabelDecl *LabelDecl::Create(ASTContext &C, DeclContext *DC,
4388 SourceLocation IdentL, IdentifierInfo *II,
4389 SourceLocation GnuLabelL) {
4390 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-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 4390, __PRETTY_FUNCTION__))
;
4391 return new (C, DC) LabelDecl(DC, IdentL, II, nullptr, GnuLabelL);
4392}
4393
4394LabelDecl *LabelDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
4395 return new (C, ID) LabelDecl(nullptr, SourceLocation(), nullptr, nullptr,
4396 SourceLocation());
4397}
4398
4399void LabelDecl::setMSAsmLabel(StringRef Name) {
4400 char *Buffer = new (getASTContext(), 1) char[Name.size() + 1];
1
'Buffer' initialized to a null pointer value
4401 memcpy(Buffer, Name.data(), Name.size());
2
Null pointer passed as an argument to a 'nonnull' parameter
4402 Buffer[Name.size()] = '\0';
4403 MSAsmName = Buffer;
4404}
4405
4406void ValueDecl::anchor() {}
4407
4408bool ValueDecl::isWeak() const {
4409 for (const auto *I : attrs())
4410 if (isa<WeakAttr>(I) || isa<WeakRefAttr>(I))
4411 return true;
4412
4413 return isWeakImported();
4414}
4415
4416void ImplicitParamDecl::anchor() {}
4417
4418ImplicitParamDecl *ImplicitParamDecl::Create(ASTContext &C, DeclContext *DC,
4419 SourceLocation IdLoc,
4420 IdentifierInfo *Id, QualType Type,
4421 ImplicitParamKind ParamKind) {
4422 return new (C, DC) ImplicitParamDecl(C, DC, IdLoc, Id, Type, ParamKind);
4423}
4424
4425ImplicitParamDecl *ImplicitParamDecl::Create(ASTContext &C, QualType Type,
4426 ImplicitParamKind ParamKind) {
4427 return new (C, nullptr) ImplicitParamDecl(C, Type, ParamKind);
4428}
4429
4430ImplicitParamDecl *ImplicitParamDecl::CreateDeserialized(ASTContext &C,
4431 unsigned ID) {
4432 return new (C, ID) ImplicitParamDecl(C, QualType(), ImplicitParamKind::Other);
4433}
4434
4435FunctionDecl *FunctionDecl::Create(ASTContext &C, DeclContext *DC,
4436 SourceLocation StartLoc,
4437 const DeclarationNameInfo &NameInfo,
4438 QualType T, TypeSourceInfo *TInfo,
4439 StorageClass SC,
4440 bool isInlineSpecified,
4441 bool hasWrittenPrototype,
4442 bool isConstexprSpecified) {
4443 FunctionDecl *New =
4444 new (C, DC) FunctionDecl(Function, C, DC, StartLoc, NameInfo, T, TInfo,
4445 SC, isInlineSpecified, isConstexprSpecified);
4446 New->setHasWrittenPrototype(hasWrittenPrototype);
4447 return New;
4448}
4449
4450FunctionDecl *FunctionDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
4451 return new (C, ID) FunctionDecl(Function, C, nullptr, SourceLocation(),
4452 DeclarationNameInfo(), QualType(), nullptr,
4453 SC_None, false, false);
4454}
4455
4456BlockDecl *BlockDecl::Create(ASTContext &C, DeclContext *DC, SourceLocation L) {
4457 return new (C, DC) BlockDecl(DC, L);
4458}
4459
4460BlockDecl *BlockDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
4461 return new (C, ID) BlockDecl(nullptr, SourceLocation());
4462}
4463
4464CapturedDecl::CapturedDecl(DeclContext *DC, unsigned NumParams)
4465 : Decl(Captured, DC, SourceLocation()), DeclContext(Captured),
4466 NumParams(NumParams), ContextParam(0), BodyAndNothrow(nullptr, false) {}
4467
4468CapturedDecl *CapturedDecl::Create(ASTContext &C, DeclContext *DC,
4469 unsigned NumParams) {
4470 return new (C, DC, additionalSizeToAlloc<ImplicitParamDecl *>(NumParams))
4471 CapturedDecl(DC, NumParams);
4472}
4473
4474CapturedDecl *CapturedDecl::CreateDeserialized(ASTContext &C, unsigned ID,
4475 unsigned NumParams) {
4476 return new (C, ID, additionalSizeToAlloc<ImplicitParamDecl *>(NumParams))
4477 CapturedDecl(nullptr, NumParams);
4478}
4479
4480Stmt *CapturedDecl::getBody() const { return BodyAndNothrow.getPointer(); }
4481void CapturedDecl::setBody(Stmt *B) { BodyAndNothrow.setPointer(B); }
4482
4483bool CapturedDecl::isNothrow() const { return BodyAndNothrow.getInt(); }
4484void CapturedDecl::setNothrow(bool Nothrow) { BodyAndNothrow.setInt(Nothrow); }
4485
4486EnumConstantDecl *EnumConstantDecl::Create(ASTContext &C, EnumDecl *CD,
4487 SourceLocation L,
4488 IdentifierInfo *Id, QualType T,
4489 Expr *E, const llvm::APSInt &V) {
4490 return new (C, CD) EnumConstantDecl(CD, L, Id, T, E, V);
4491}
4492
4493EnumConstantDecl *
4494EnumConstantDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
4495 return new (C, ID) EnumConstantDecl(nullptr, SourceLocation(), nullptr,
4496 QualType(), nullptr, llvm::APSInt());
4497}
4498
4499void IndirectFieldDecl::anchor() {}
4500
4501IndirectFieldDecl::IndirectFieldDecl(ASTContext &C, DeclContext *DC,
4502 SourceLocation L, DeclarationName N,
4503 QualType T,
4504 MutableArrayRef<NamedDecl *> CH)
4505 : ValueDecl(IndirectField, DC, L, N, T), Chaining(CH.data()),
4506 ChainingSize(CH.size()) {
4507 // In C++, indirect field declarations conflict with tag declarations in the
4508 // same scope, so add them to IDNS_Tag so that tag redeclaration finds them.
4509 if (C.getLangOpts().CPlusPlus)
4510 IdentifierNamespace |= IDNS_Tag;
4511}
4512
4513IndirectFieldDecl *
4514IndirectFieldDecl::Create(ASTContext &C, DeclContext *DC, SourceLocation L,
4515 IdentifierInfo *Id, QualType T,
4516 llvm::MutableArrayRef<NamedDecl *> CH) {
4517 return new (C, DC) IndirectFieldDecl(C, DC, L, Id, T, CH);
4518}
4519
4520IndirectFieldDecl *IndirectFieldDecl::CreateDeserialized(ASTContext &C,
4521 unsigned ID) {
4522 return new (C, ID) IndirectFieldDecl(C, nullptr, SourceLocation(),
4523 DeclarationName(), QualType(), None);
4524}
4525
4526SourceRange EnumConstantDecl::getSourceRange() const {
4527 SourceLocation End = getLocation();
4528 if (Init)
4529 End = Init->getEndLoc();
4530 return SourceRange(getLocation(), End);
4531}
4532
4533void TypeDecl::anchor() {}
4534
4535TypedefDecl *TypedefDecl::Create(ASTContext &C, DeclContext *DC,
4536 SourceLocation StartLoc, SourceLocation IdLoc,
4537 IdentifierInfo *Id, TypeSourceInfo *TInfo) {
4538 return new (C, DC) TypedefDecl(C, DC, StartLoc, IdLoc, Id, TInfo);
4539}
4540
4541void TypedefNameDecl::anchor() {}
4542
4543TagDecl *TypedefNameDecl::getAnonDeclWithTypedefName(bool AnyRedecl) const {
4544 if (auto *TT = getTypeSourceInfo()->getType()->getAs<TagType>()) {
4545 auto *OwningTypedef = TT->getDecl()->getTypedefNameForAnonDecl();
4546 auto *ThisTypedef = this;
4547 if (AnyRedecl && OwningTypedef) {
4548 OwningTypedef = OwningTypedef->getCanonicalDecl();
4549 ThisTypedef = ThisTypedef->getCanonicalDecl();
4550 }
4551 if (OwningTypedef == ThisTypedef)
4552 return TT->getDecl();
4553 }
4554
4555 return nullptr;
4556}
4557
4558bool TypedefNameDecl::isTransparentTagSlow() const {
4559 auto determineIsTransparent = [&]() {
4560 if (auto *TT = getUnderlyingType()->getAs<TagType>()) {
4561 if (auto *TD = TT->getDecl()) {
4562 if (TD->getName() != getName())
4563 return false;
4564 SourceLocation TTLoc = getLocation();
4565 SourceLocation TDLoc = TD->getLocation();
4566 if (!TTLoc.isMacroID() || !TDLoc.isMacroID())
4567 return false;
4568 SourceManager &SM = getASTContext().getSourceManager();
4569 return SM.getSpellingLoc(TTLoc) == SM.getSpellingLoc(TDLoc);
4570 }
4571 }
4572 return false;
4573 };
4574
4575 bool isTransparent = determineIsTransparent();
4576 MaybeModedTInfo.setInt((isTransparent << 1) | 1);
4577 return isTransparent;
4578}
4579
4580TypedefDecl *TypedefDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
4581 return new (C, ID) TypedefDecl(C, nullptr, SourceLocation(), SourceLocation(),
4582 nullptr, nullptr);
4583}
4584
4585TypeAliasDecl *TypeAliasDecl::Create(ASTContext &C, DeclContext *DC,
4586 SourceLocation StartLoc,
4587 SourceLocation IdLoc, IdentifierInfo *Id,
4588 TypeSourceInfo *TInfo) {
4589 return new (C, DC) TypeAliasDecl(C, DC, StartLoc, IdLoc, Id, TInfo);
4590}
4591
4592TypeAliasDecl *TypeAliasDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
4593 return new (C, ID) TypeAliasDecl(C, nullptr, SourceLocation(),
4594 SourceLocation(), nullptr, nullptr);
4595}
4596
4597SourceRange TypedefDecl::getSourceRange() const {
4598 SourceLocation RangeEnd = getLocation();
4599 if (TypeSourceInfo *TInfo = getTypeSourceInfo()) {
4600 if (typeIsPostfix(TInfo->getType()))
4601 RangeEnd = TInfo->getTypeLoc().getSourceRange().getEnd();
4602 }
4603 return SourceRange(getBeginLoc(), RangeEnd);
4604}
4605
4606SourceRange TypeAliasDecl::getSourceRange() const {
4607 SourceLocation RangeEnd = getBeginLoc();
4608 if (TypeSourceInfo *TInfo = getTypeSourceInfo())
4609 RangeEnd = TInfo->getTypeLoc().getSourceRange().getEnd();
4610 return SourceRange(getBeginLoc(), RangeEnd);
4611}
4612
4613void FileScopeAsmDecl::anchor() {}
4614
4615FileScopeAsmDecl *FileScopeAsmDecl::Create(ASTContext &C, DeclContext *DC,
4616 StringLiteral *Str,
4617 SourceLocation AsmLoc,
4618 SourceLocation RParenLoc) {
4619 return new (C, DC) FileScopeAsmDecl(DC, Str, AsmLoc, RParenLoc);
4620}
4621
4622FileScopeAsmDecl *FileScopeAsmDecl::CreateDeserialized(ASTContext &C,
4623 unsigned ID) {
4624 return new (C, ID) FileScopeAsmDecl(nullptr, nullptr, SourceLocation(),
4625 SourceLocation());
4626}
4627
4628void EmptyDecl::anchor() {}
4629
4630EmptyDecl *EmptyDecl::Create(ASTContext &C, DeclContext *DC, SourceLocation L) {
4631 return new (C, DC) EmptyDecl(DC, L);
4632}
4633
4634EmptyDecl *EmptyDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
4635 return new (C, ID) EmptyDecl(nullptr, SourceLocation());
4636}
4637
4638//===----------------------------------------------------------------------===//
4639// ImportDecl Implementation
4640//===----------------------------------------------------------------------===//
4641
4642/// Retrieve the number of module identifiers needed to name the given
4643/// module.
4644static unsigned getNumModuleIdentifiers(Module *Mod) {
4645 unsigned Result = 1;
4646 while (Mod->Parent) {
4647 Mod = Mod->Parent;
4648 ++Result;
4649 }
4650 return Result;
4651}
4652
4653ImportDecl::ImportDecl(DeclContext *DC, SourceLocation StartLoc,
4654 Module *Imported,
4655 ArrayRef<SourceLocation> IdentifierLocs)
4656 : Decl(Import, DC, StartLoc), ImportedAndComplete(Imported, true) {
4657 assert(getNumModuleIdentifiers(Imported) == IdentifierLocs.size())((getNumModuleIdentifiers(Imported) == IdentifierLocs.size())
? static_cast<void> (0) : __assert_fail ("getNumModuleIdentifiers(Imported) == IdentifierLocs.size()"
, "/build/llvm-toolchain-snapshot-8~svn350071/tools/clang/lib/AST/Decl.cpp"
, 4657, __PRETTY_FUNCTION__))
;
4658 auto *StoredLocs = getTrailingObjects<SourceLocation>();
4659 std::uninitialized_copy(IdentifierLocs.begin(), IdentifierLocs.end(),
4660 StoredLocs);
4661}
4662
4663ImportDecl::ImportDecl(DeclContext *DC, SourceLocation StartLoc,
4664 Module *Imported, SourceLocation EndLoc)
4665 : Decl(Import, DC, StartLoc), ImportedAndComplete(Imported, false) {
4666 *getTrailingObjects<SourceLocation>() = EndLoc;
4667}
4668
4669ImportDecl *ImportDecl::Create(ASTContext &C, DeclContext *DC,
4670 SourceLocation StartLoc, Module *Imported,
4671 ArrayRef<SourceLocation> IdentifierLocs) {
4672 return new (C, DC,
4673 additionalSizeToAlloc<SourceLocation>(IdentifierLocs.size()))
4674 ImportDecl(DC, StartLoc, Imported, IdentifierLocs);
4675}
4676
4677ImportDecl *ImportDecl::CreateImplicit(ASTContext &C, DeclContext *DC,
4678 SourceLocation StartLoc,
4679 Module *Imported,
4680 SourceLocation EndLoc) {
4681 ImportDecl *Import = new (C, DC, additionalSizeToAlloc<SourceLocation>(1))
4682 ImportDecl(DC, StartLoc, Imported, EndLoc);
4683 Import->setImplicit();
4684 return Import;
4685}
4686
4687ImportDecl *ImportDecl::CreateDeserialized(ASTContext &C, unsigned ID,
4688 unsigned NumLocations) {
4689 return new (C, ID, additionalSizeToAlloc<SourceLocation>(NumLocations))
4690 ImportDecl(EmptyShell());
4691}
4692
4693ArrayRef<SourceLocation> ImportDecl::getIdentifierLocs() const {
4694 if (!ImportedAndComplete.getInt())
4695 return None;
4696
4697 const auto *StoredLocs = getTrailingObjects<SourceLocation>();
4698 return llvm::makeArrayRef(StoredLocs,
4699 getNumModuleIdentifiers(getImportedModule()));
4700}
4701
4702SourceRange ImportDecl::getSourceRange() const {
4703 if (!ImportedAndComplete.getInt())
4704 return SourceRange(getLocation(), *getTrailingObjects<SourceLocation>());
4705
4706 return SourceRange(getLocation(), getIdentifierLocs().back());
4707}
4708
4709//===----------------------------------------------------------------------===//
4710// ExportDecl Implementation
4711//===----------------------------------------------------------------------===//
4712
4713void ExportDecl::anchor() {}
4714
4715ExportDecl *ExportDecl::Create(ASTContext &C, DeclContext *DC,
4716 SourceLocation ExportLoc) {
4717 return new (C, DC) ExportDecl(DC, ExportLoc);
4718}
4719
4720ExportDecl *ExportDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
4721 return new (C, ID) ExportDecl(nullptr, SourceLocation());
4722}