Bug Summary

File:tools/clang/lib/AST/Decl.cpp
Warning:line 4273, 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-eagerly-assume -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 -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-7/lib/clang/7.0.0 -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-7~svn338205/build-llvm/tools/clang/lib/AST -I /build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST -I /build/llvm-toolchain-snapshot-7~svn338205/tools/clang/include -I /build/llvm-toolchain-snapshot-7~svn338205/build-llvm/tools/clang/include -I /build/llvm-toolchain-snapshot-7~svn338205/build-llvm/include -I /build/llvm-toolchain-snapshot-7~svn338205/include -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/8/../../../../include/c++/8 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/8/../../../../include/x86_64-linux-gnu/c++/8 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/8/../../../../include/x86_64-linux-gnu/c++/8 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/8/../../../../include/c++/8/backward -internal-isystem /usr/include/clang/7.0.0/include/ -internal-isystem /usr/local/include -internal-isystem /usr/lib/llvm-7/lib/clang/7.0.0/include -internal-externc-isystem /usr/lib/gcc/x86_64-linux-gnu/8/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-class-memaccess -Wno-comment -std=c++11 -fdeprecated-macro -fdebug-compilation-dir /build/llvm-toolchain-snapshot-7~svn338205/build-llvm/tools/clang/lib/AST -ferror-limit 19 -fmessage-length 0 -fvisibility-inlines-hidden -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-2018-07-29-043837-17923-1 -x c++ /build/llvm-toolchain-snapshot-7~svn338205/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/ASTLambda.h"
18#include "clang/AST/ASTMutationListener.h"
19#include "clang/AST/CanonicalType.h"
20#include "clang/AST/DeclBase.h"
21#include "clang/AST/DeclCXX.h"
22#include "clang/AST/DeclObjC.h"
23#include "clang/AST/DeclOpenMP.h"
24#include "clang/AST/DeclTemplate.h"
25#include "clang/AST/DeclarationName.h"
26#include "clang/AST/Expr.h"
27#include "clang/AST/ExprCXX.h"
28#include "clang/AST/ExternalASTSource.h"
29#include "clang/AST/ODRHash.h"
30#include "clang/AST/PrettyDeclStackTrace.h"
31#include "clang/AST/PrettyPrinter.h"
32#include "clang/AST/Redeclarable.h"
33#include "clang/AST/Stmt.h"
34#include "clang/AST/TemplateBase.h"
35#include "clang/AST/Type.h"
36#include "clang/AST/TypeLoc.h"
37#include "clang/Basic/Builtins.h"
38#include "clang/Basic/IdentifierTable.h"
39#include "clang/Basic/LLVM.h"
40#include "clang/Basic/LangOptions.h"
41#include "clang/Basic/Linkage.h"
42#include "clang/Basic/Module.h"
43#include "clang/Basic/PartialDiagnostic.h"
44#include "clang/Basic/SanitizerBlacklist.h"
45#include "clang/Basic/Sanitizers.h"
46#include "clang/Basic/SourceLocation.h"
47#include "clang/Basic/SourceManager.h"
48#include "clang/Basic/Specifiers.h"
49#include "clang/Basic/TargetCXXABI.h"
50#include "clang/Basic/TargetInfo.h"
51#include "clang/Basic/Visibility.h"
52#include "clang/Frontend/FrontendDiagnostic.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 &&(static_cast <bool> (!kind.IgnoreExplicitVisibility &&
"asking for explicit visibility when we shouldn't be") ? void
(0) : __assert_fail ("!kind.IgnoreExplicitVisibility && \"asking for explicit visibility when we shouldn't be\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 174, __extension__ __PRETTY_FUNCTION__))
174 "asking for explicit visibility when we shouldn't be")(static_cast <bool> (!kind.IgnoreExplicitVisibility &&
"asking for explicit visibility when we shouldn't be") ? void
(0) : __assert_fail ("!kind.IgnoreExplicitVisibility && \"asking for explicit visibility when we shouldn't be\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 174, __extension__ __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-7~svn338205/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))(static_cast <bool> (!usesTypeVisibility(ND)) ? void (0
) : __assert_fail ("!usesTypeVisibility(ND)", "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 336, __extension__ __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-7~svn338205/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-7~svn338205/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() &&(static_cast <bool> (D->getDeclContext()->getRedeclContext
()->isFileContext() && "Not a name having namespace scope"
) ? void (0) : __assert_fail ("D->getDeclContext()->getRedeclContext()->isFileContext() && \"Not a name having namespace scope\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 616, __extension__ __PRETTY_FUNCTION__))
616 "Not a name having namespace scope")(static_cast <bool> (D->getDeclContext()->getRedeclContext
()->isFileContext() && "Not a name having namespace scope"
) ? void (0) : __assert_fail ("D->getDeclContext()->getRedeclContext()->isFileContext() && \"Not a name having namespace scope\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 616, __extension__ __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!")(static_cast <bool> (VD && "Expected a VarDecl in this IndirectFieldDecl!"
) ? void (0) : __assert_fail ("VD && \"Expected a VarDecl in this IndirectFieldDecl!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 670, __extension__ __PRETTY_FUNCTION__))
;
671 return getLVForNamespaceScopeDecl(VD, computation, IgnoreVarTypeLinkage);
672 }
673 assert(!isa<FieldDecl>(D) && "Didn't expect a FieldDecl!")(static_cast <bool> (!isa<FieldDecl>(D) &&
"Didn't expect a FieldDecl!") ? void (0) : __assert_fail ("!isa<FieldDecl>(D) && \"Didn't expect a FieldDecl!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 673, __extension__ __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, true);
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, true);
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))(static_cast <bool> (!explicitSpecSuppressor || !isa<
TemplateDecl>(explicitSpecSuppressor)) ? void (0) : __assert_fail
("!explicitSpecSuppressor || !isa<TemplateDecl>(explicitSpecSuppressor)"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 1019, __extension__ __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())(static_cast <bool> (!IsMostRecent || ND == ND->getMostRecentDecl
()) ? void (0) : __assert_fail ("!IsMostRecent || ND == ND->getMostRecentDecl()"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 1078, __extension__ __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 LV = getLVForDecl(FD, computation);
1266 }
1267 if (!isExternallyVisible(LV.getLinkage()))
1268 return LinkageInfo::none();
1269 return LinkageInfo(VisibleNoLinkage, LV.getVisibility(),
1270 LV.isVisibilityExplicit());
1271}
1272
1273static inline const CXXRecordDecl*
1274getOutermostEnclosingLambda(const CXXRecordDecl *Record) {
1275 const CXXRecordDecl *Ret = Record;
1276 while (Record && Record->isLambda()) {
1277 Ret = Record;
1278 if (!Record->getParent()) break;
1279 // Get the Containing Class of this Lambda Class
1280 Record = dyn_cast_or_null<CXXRecordDecl>(
1281 Record->getParent()->getParent());
1282 }
1283 return Ret;
1284}
1285
1286LinkageInfo LinkageComputer::computeLVForDecl(const NamedDecl *D,
1287 LVComputationKind computation,
1288 bool IgnoreVarTypeLinkage) {
1289 // Internal_linkage attribute overrides other considerations.
1290 if (D->hasAttr<InternalLinkageAttr>())
1291 return getInternalLinkageFor(D);
1292
1293 // Objective-C: treat all Objective-C declarations as having external
1294 // linkage.
1295 switch (D->getKind()) {
1296 default:
1297 break;
1298
1299 // Per C++ [basic.link]p2, only the names of objects, references,
1300 // functions, types, templates, namespaces, and values ever have linkage.
1301 //
1302 // Note that the name of a typedef, namespace alias, using declaration,
1303 // and so on are not the name of the corresponding type, namespace, or
1304 // declaration, so they do *not* have linkage.
1305 case Decl::ImplicitParam:
1306 case Decl::Label:
1307 case Decl::NamespaceAlias:
1308 case Decl::ParmVar:
1309 case Decl::Using:
1310 case Decl::UsingShadow:
1311 case Decl::UsingDirective:
1312 return LinkageInfo::none();
1313
1314 case Decl::EnumConstant:
1315 // C++ [basic.link]p4: an enumerator has the linkage of its enumeration.
1316 if (D->getASTContext().getLangOpts().CPlusPlus)
1317 return getLVForDecl(cast<EnumDecl>(D->getDeclContext()), computation);
1318 return LinkageInfo::visible_none();
1319
1320 case Decl::Typedef:
1321 case Decl::TypeAlias:
1322 // A typedef declaration has linkage if it gives a type a name for
1323 // linkage purposes.
1324 if (!cast<TypedefNameDecl>(D)
1325 ->getAnonDeclWithTypedefName(/*AnyRedecl*/true))
1326 return LinkageInfo::none();
1327 break;
1328
1329 case Decl::TemplateTemplateParm: // count these as external
1330 case Decl::NonTypeTemplateParm:
1331 case Decl::ObjCAtDefsField:
1332 case Decl::ObjCCategory:
1333 case Decl::ObjCCategoryImpl:
1334 case Decl::ObjCCompatibleAlias:
1335 case Decl::ObjCImplementation:
1336 case Decl::ObjCMethod:
1337 case Decl::ObjCProperty:
1338 case Decl::ObjCPropertyImpl:
1339 case Decl::ObjCProtocol:
1340 return getExternalLinkageFor(D);
1341
1342 case Decl::CXXRecord: {
1343 const auto *Record = cast<CXXRecordDecl>(D);
1344 if (Record->isLambda()) {
1345 if (!Record->getLambdaManglingNumber()) {
1346 // This lambda has no mangling number, so it's internal.
1347 return getInternalLinkageFor(D);
1348 }
1349
1350 // This lambda has its linkage/visibility determined:
1351 // - either by the outermost lambda if that lambda has no mangling
1352 // number.
1353 // - or by the parent of the outer most lambda
1354 // This prevents infinite recursion in settings such as nested lambdas
1355 // used in NSDMI's, for e.g.
1356 // struct L {
1357 // int t{};
1358 // int t2 = ([](int a) { return [](int b) { return b; };})(t)(t);
1359 // };
1360 const CXXRecordDecl *OuterMostLambda =
1361 getOutermostEnclosingLambda(Record);
1362 if (!OuterMostLambda->getLambdaManglingNumber())
1363 return getInternalLinkageFor(D);
1364
1365 return getLVForClosure(
1366 OuterMostLambda->getDeclContext()->getRedeclContext(),
1367 OuterMostLambda->getLambdaContextDecl(), computation);
1368 }
1369
1370 break;
1371 }
1372 }
1373
1374 // Handle linkage for namespace-scope names.
1375 if (D->getDeclContext()->getRedeclContext()->isFileContext())
1376 return getLVForNamespaceScopeDecl(D, computation, IgnoreVarTypeLinkage);
1377
1378 // C++ [basic.link]p5:
1379 // In addition, a member function, static data member, a named
1380 // class or enumeration of class scope, or an unnamed class or
1381 // enumeration defined in a class-scope typedef declaration such
1382 // that the class or enumeration has the typedef name for linkage
1383 // purposes (7.1.3), has external linkage if the name of the class
1384 // has external linkage.
1385 if (D->getDeclContext()->isRecord())
1386 return getLVForClassMember(D, computation, IgnoreVarTypeLinkage);
1387
1388 // C++ [basic.link]p6:
1389 // The name of a function declared in block scope and the name of
1390 // an object declared by a block scope extern declaration have
1391 // linkage. If there is a visible declaration of an entity with
1392 // linkage having the same name and type, ignoring entities
1393 // declared outside the innermost enclosing namespace scope, the
1394 // block scope declaration declares that same entity and receives
1395 // the linkage of the previous declaration. If there is more than
1396 // one such matching entity, the program is ill-formed. Otherwise,
1397 // if no matching entity is found, the block scope entity receives
1398 // external linkage.
1399 if (D->getDeclContext()->isFunctionOrMethod())
1400 return getLVForLocalDecl(D, computation);
1401
1402 // C++ [basic.link]p6:
1403 // Names not covered by these rules have no linkage.
1404 return LinkageInfo::none();
1405}
1406
1407/// getLVForDecl - Get the linkage and visibility for the given declaration.
1408LinkageInfo LinkageComputer::getLVForDecl(const NamedDecl *D,
1409 LVComputationKind computation) {
1410 // Internal_linkage attribute overrides other considerations.
1411 if (D->hasAttr<InternalLinkageAttr>())
1412 return getInternalLinkageFor(D);
1413
1414 if (computation.IgnoreAllVisibility && D->hasCachedLinkage())
1415 return LinkageInfo(D->getCachedLinkage(), DefaultVisibility, false);
1416
1417 if (llvm::Optional<LinkageInfo> LI = lookup(D, computation))
1418 return *LI;
1419
1420 LinkageInfo LV = computeLVForDecl(D, computation);
1421 if (D->hasCachedLinkage())
1422 assert(D->getCachedLinkage() == LV.getLinkage())(static_cast <bool> (D->getCachedLinkage() == LV.getLinkage
()) ? void (0) : __assert_fail ("D->getCachedLinkage() == LV.getLinkage()"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 1422, __extension__ __PRETTY_FUNCTION__))
;
1423
1424 D->setCachedLinkage(LV.getLinkage());
1425 cache(D, computation, LV);
1426
1427#ifndef NDEBUG
1428 // In C (because of gnu inline) and in c++ with microsoft extensions an
1429 // static can follow an extern, so we can have two decls with different
1430 // linkages.
1431 const LangOptions &Opts = D->getASTContext().getLangOpts();
1432 if (!Opts.CPlusPlus || Opts.MicrosoftExt)
1433 return LV;
1434
1435 // We have just computed the linkage for this decl. By induction we know
1436 // that all other computed linkages match, check that the one we just
1437 // computed also does.
1438 NamedDecl *Old = nullptr;
1439 for (auto I : D->redecls()) {
1440 auto *T = cast<NamedDecl>(I);
1441 if (T == D)
1442 continue;
1443 if (!T->isInvalidDecl() && T->hasCachedLinkage()) {
1444 Old = T;
1445 break;
1446 }
1447 }
1448 assert(!Old || Old->getCachedLinkage() == D->getCachedLinkage())(static_cast <bool> (!Old || Old->getCachedLinkage()
== D->getCachedLinkage()) ? void (0) : __assert_fail ("!Old || Old->getCachedLinkage() == D->getCachedLinkage()"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 1448, __extension__ __PRETTY_FUNCTION__))
;
1449#endif
1450
1451 return LV;
1452}
1453
1454LinkageInfo LinkageComputer::getDeclLinkageAndVisibility(const NamedDecl *D) {
1455 return getLVForDecl(D,
1456 LVComputationKind(usesTypeVisibility(D)
1457 ? NamedDecl::VisibilityForType
1458 : NamedDecl::VisibilityForValue));
1459}
1460
1461Module *Decl::getOwningModuleForLinkage(bool IgnoreLinkage) const {
1462 Module *M = getOwningModule();
1463 if (!M)
1464 return nullptr;
1465
1466 switch (M->Kind) {
1467 case Module::ModuleMapModule:
1468 // Module map modules have no special linkage semantics.
1469 return nullptr;
1470
1471 case Module::ModuleInterfaceUnit:
1472 return M;
1473
1474 case Module::GlobalModuleFragment: {
1475 // External linkage declarations in the global module have no owning module
1476 // for linkage purposes. But internal linkage declarations in the global
1477 // module fragment of a particular module are owned by that module for
1478 // linkage purposes.
1479 if (IgnoreLinkage)
1480 return nullptr;
1481 bool InternalLinkage;
1482 if (auto *ND = dyn_cast<NamedDecl>(this))
1483 InternalLinkage = !ND->hasExternalFormalLinkage();
1484 else {
1485 auto *NSD = dyn_cast<NamespaceDecl>(this);
1486 InternalLinkage = (NSD && NSD->isAnonymousNamespace()) ||
1487 isInAnonymousNamespace();
1488 }
1489 return InternalLinkage ? M->Parent : nullptr;
1490 }
1491 }
1492
1493 llvm_unreachable("unknown module kind")::llvm::llvm_unreachable_internal("unknown module kind", "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 1493)
;
1494}
1495
1496void NamedDecl::printName(raw_ostream &os) const {
1497 os << Name;
1498}
1499
1500std::string NamedDecl::getQualifiedNameAsString() const {
1501 std::string QualName;
1502 llvm::raw_string_ostream OS(QualName);
1503 printQualifiedName(OS, getASTContext().getPrintingPolicy());
1504 return OS.str();
1505}
1506
1507void NamedDecl::printQualifiedName(raw_ostream &OS) const {
1508 printQualifiedName(OS, getASTContext().getPrintingPolicy());
1509}
1510
1511void NamedDecl::printQualifiedName(raw_ostream &OS,
1512 const PrintingPolicy &P) const {
1513 const DeclContext *Ctx = getDeclContext();
1514
1515 // For ObjC methods, look through categories and use the interface as context.
1516 if (auto *MD = dyn_cast<ObjCMethodDecl>(this))
1517 if (auto *ID = MD->getClassInterface())
1518 Ctx = ID;
1519
1520 if (Ctx->isFunctionOrMethod()) {
1521 printName(OS);
1522 return;
1523 }
1524
1525 using ContextsTy = SmallVector<const DeclContext *, 8>;
1526 ContextsTy Contexts;
1527
1528 // Collect named contexts.
1529 while (Ctx) {
1530 if (isa<NamedDecl>(Ctx))
1531 Contexts.push_back(Ctx);
1532 Ctx = Ctx->getParent();
1533 }
1534
1535 for (const DeclContext *DC : llvm::reverse(Contexts)) {
1536 if (const auto *Spec = dyn_cast<ClassTemplateSpecializationDecl>(DC)) {
1537 OS << Spec->getName();
1538 const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs();
1539 printTemplateArgumentList(OS, TemplateArgs.asArray(), P);
1540 } else if (const auto *ND = dyn_cast<NamespaceDecl>(DC)) {
1541 if (P.SuppressUnwrittenScope &&
1542 (ND->isAnonymousNamespace() || ND->isInline()))
1543 continue;
1544 if (ND->isAnonymousNamespace()) {
1545 OS << (P.MSVCFormatting ? "`anonymous namespace\'"
1546 : "(anonymous namespace)");
1547 }
1548 else
1549 OS << *ND;
1550 } else if (const auto *RD = dyn_cast<RecordDecl>(DC)) {
1551 if (!RD->getIdentifier())
1552 OS << "(anonymous " << RD->getKindName() << ')';
1553 else
1554 OS << *RD;
1555 } else if (const auto *FD = dyn_cast<FunctionDecl>(DC)) {
1556 const FunctionProtoType *FT = nullptr;
1557 if (FD->hasWrittenPrototype())
1558 FT = dyn_cast<FunctionProtoType>(FD->getType()->castAs<FunctionType>());
1559
1560 OS << *FD << '(';
1561 if (FT) {
1562 unsigned NumParams = FD->getNumParams();
1563 for (unsigned i = 0; i < NumParams; ++i) {
1564 if (i)
1565 OS << ", ";
1566 OS << FD->getParamDecl(i)->getType().stream(P);
1567 }
1568
1569 if (FT->isVariadic()) {
1570 if (NumParams > 0)
1571 OS << ", ";
1572 OS << "...";
1573 }
1574 }
1575 OS << ')';
1576 } else if (const auto *ED = dyn_cast<EnumDecl>(DC)) {
1577 // C++ [dcl.enum]p10: Each enum-name and each unscoped
1578 // enumerator is declared in the scope that immediately contains
1579 // the enum-specifier. Each scoped enumerator is declared in the
1580 // scope of the enumeration.
1581 // For the case of unscoped enumerator, do not include in the qualified
1582 // name any information about its enum enclosing scope, as its visibility
1583 // is global.
1584 if (ED->isScoped())
1585 OS << *ED;
1586 else
1587 continue;
1588 } else {
1589 OS << *cast<NamedDecl>(DC);
1590 }
1591 OS << "::";
1592 }
1593
1594 if (getDeclName() || isa<DecompositionDecl>(this))
1595 OS << *this;
1596 else
1597 OS << "(anonymous)";
1598}
1599
1600void NamedDecl::getNameForDiagnostic(raw_ostream &OS,
1601 const PrintingPolicy &Policy,
1602 bool Qualified) const {
1603 if (Qualified)
1604 printQualifiedName(OS, Policy);
1605 else
1606 printName(OS);
1607}
1608
1609template<typename T> static bool isRedeclarableImpl(Redeclarable<T> *) {
1610 return true;
1611}
1612static bool isRedeclarableImpl(...) { return false; }
1613static bool isRedeclarable(Decl::Kind K) {
1614 switch (K) {
1615#define DECL(Type, Base) \
1616 case Decl::Type: \
1617 return isRedeclarableImpl((Type##Decl *)nullptr);
1618#define ABSTRACT_DECL(DECL)
1619#include "clang/AST/DeclNodes.inc"
1620 }
1621 llvm_unreachable("unknown decl kind")::llvm::llvm_unreachable_internal("unknown decl kind", "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 1621)
;
1622}
1623
1624bool NamedDecl::declarationReplaces(NamedDecl *OldD, bool IsKnownNewer) const {
1625 assert(getDeclName() == OldD->getDeclName() && "Declaration name mismatch")(static_cast <bool> (getDeclName() == OldD->getDeclName
() && "Declaration name mismatch") ? void (0) : __assert_fail
("getDeclName() == OldD->getDeclName() && \"Declaration name mismatch\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 1625, __extension__ __PRETTY_FUNCTION__))
;
1626
1627 // Never replace one imported declaration with another; we need both results
1628 // when re-exporting.
1629 if (OldD->isFromASTFile() && isFromASTFile())
1630 return false;
1631
1632 // A kind mismatch implies that the declaration is not replaced.
1633 if (OldD->getKind() != getKind())
1634 return false;
1635
1636 // For method declarations, we never replace. (Why?)
1637 if (isa<ObjCMethodDecl>(this))
1638 return false;
1639
1640 // For parameters, pick the newer one. This is either an error or (in
1641 // Objective-C) permitted as an extension.
1642 if (isa<ParmVarDecl>(this))
1643 return true;
1644
1645 // Inline namespaces can give us two declarations with the same
1646 // name and kind in the same scope but different contexts; we should
1647 // keep both declarations in this case.
1648 if (!this->getDeclContext()->getRedeclContext()->Equals(
1649 OldD->getDeclContext()->getRedeclContext()))
1650 return false;
1651
1652 // Using declarations can be replaced if they import the same name from the
1653 // same context.
1654 if (auto *UD = dyn_cast<UsingDecl>(this)) {
1655 ASTContext &Context = getASTContext();
1656 return Context.getCanonicalNestedNameSpecifier(UD->getQualifier()) ==
1657 Context.getCanonicalNestedNameSpecifier(
1658 cast<UsingDecl>(OldD)->getQualifier());
1659 }
1660 if (auto *UUVD = dyn_cast<UnresolvedUsingValueDecl>(this)) {
1661 ASTContext &Context = getASTContext();
1662 return Context.getCanonicalNestedNameSpecifier(UUVD->getQualifier()) ==
1663 Context.getCanonicalNestedNameSpecifier(
1664 cast<UnresolvedUsingValueDecl>(OldD)->getQualifier());
1665 }
1666
1667 if (isRedeclarable(getKind())) {
1668 if (getCanonicalDecl() != OldD->getCanonicalDecl())
1669 return false;
1670
1671 if (IsKnownNewer)
1672 return true;
1673
1674 // Check whether this is actually newer than OldD. We want to keep the
1675 // newer declaration. This loop will usually only iterate once, because
1676 // OldD is usually the previous declaration.
1677 for (auto D : redecls()) {
1678 if (D == OldD)
1679 break;
1680
1681 // If we reach the canonical declaration, then OldD is not actually older
1682 // than this one.
1683 //
1684 // FIXME: In this case, we should not add this decl to the lookup table.
1685 if (D->isCanonicalDecl())
1686 return false;
1687 }
1688
1689 // It's a newer declaration of the same kind of declaration in the same
1690 // scope: we want this decl instead of the existing one.
1691 return true;
1692 }
1693
1694 // In all other cases, we need to keep both declarations in case they have
1695 // different visibility. Any attempt to use the name will result in an
1696 // ambiguity if more than one is visible.
1697 return false;
1698}
1699
1700bool NamedDecl::hasLinkage() const {
1701 return getFormalLinkage() != NoLinkage;
1702}
1703
1704NamedDecl *NamedDecl::getUnderlyingDeclImpl() {
1705 NamedDecl *ND = this;
1706 while (auto *UD = dyn_cast<UsingShadowDecl>(ND))
1707 ND = UD->getTargetDecl();
1708
1709 if (auto *AD = dyn_cast<ObjCCompatibleAliasDecl>(ND))
1710 return AD->getClassInterface();
1711
1712 if (auto *AD = dyn_cast<NamespaceAliasDecl>(ND))
1713 return AD->getNamespace();
1714
1715 return ND;
1716}
1717
1718bool NamedDecl::isCXXInstanceMember() const {
1719 if (!isCXXClassMember())
1720 return false;
1721
1722 const NamedDecl *D = this;
1723 if (isa<UsingShadowDecl>(D))
1724 D = cast<UsingShadowDecl>(D)->getTargetDecl();
1725
1726 if (isa<FieldDecl>(D) || isa<IndirectFieldDecl>(D) || isa<MSPropertyDecl>(D))
1727 return true;
1728 if (const auto *MD = dyn_cast_or_null<CXXMethodDecl>(D->getAsFunction()))
1729 return MD->isInstance();
1730 return false;
1731}
1732
1733//===----------------------------------------------------------------------===//
1734// DeclaratorDecl Implementation
1735//===----------------------------------------------------------------------===//
1736
1737template <typename DeclT>
1738static SourceLocation getTemplateOrInnerLocStart(const DeclT *decl) {
1739 if (decl->getNumTemplateParameterLists() > 0)
1740 return decl->getTemplateParameterList(0)->getTemplateLoc();
1741 else
1742 return decl->getInnerLocStart();
1743}
1744
1745SourceLocation DeclaratorDecl::getTypeSpecStartLoc() const {
1746 TypeSourceInfo *TSI = getTypeSourceInfo();
1747 if (TSI) return TSI->getTypeLoc().getBeginLoc();
1748 return SourceLocation();
1749}
1750
1751void DeclaratorDecl::setQualifierInfo(NestedNameSpecifierLoc QualifierLoc) {
1752 if (QualifierLoc) {
1753 // Make sure the extended decl info is allocated.
1754 if (!hasExtInfo()) {
1755 // Save (non-extended) type source info pointer.
1756 auto *savedTInfo = DeclInfo.get<TypeSourceInfo*>();
1757 // Allocate external info struct.
1758 DeclInfo = new (getASTContext()) ExtInfo;
1759 // Restore savedTInfo into (extended) decl info.
1760 getExtInfo()->TInfo = savedTInfo;
1761 }
1762 // Set qualifier info.
1763 getExtInfo()->QualifierLoc = QualifierLoc;
1764 } else {
1765 // Here Qualifier == 0, i.e., we are removing the qualifier (if any).
1766 if (hasExtInfo()) {
1767 if (getExtInfo()->NumTemplParamLists == 0) {
1768 // Save type source info pointer.
1769 TypeSourceInfo *savedTInfo = getExtInfo()->TInfo;
1770 // Deallocate the extended decl info.
1771 getASTContext().Deallocate(getExtInfo());
1772 // Restore savedTInfo into (non-extended) decl info.
1773 DeclInfo = savedTInfo;
1774 }
1775 else
1776 getExtInfo()->QualifierLoc = QualifierLoc;
1777 }
1778 }
1779}
1780
1781void DeclaratorDecl::setTemplateParameterListsInfo(
1782 ASTContext &Context, ArrayRef<TemplateParameterList *> TPLists) {
1783 assert(!TPLists.empty())(static_cast <bool> (!TPLists.empty()) ? void (0) : __assert_fail
("!TPLists.empty()", "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 1783, __extension__ __PRETTY_FUNCTION__))
;
1784 // Make sure the extended decl info is allocated.
1785 if (!hasExtInfo()) {
1786 // Save (non-extended) type source info pointer.
1787 auto *savedTInfo = DeclInfo.get<TypeSourceInfo*>();
1788 // Allocate external info struct.
1789 DeclInfo = new (getASTContext()) ExtInfo;
1790 // Restore savedTInfo into (extended) decl info.
1791 getExtInfo()->TInfo = savedTInfo;
1792 }
1793 // Set the template parameter lists info.
1794 getExtInfo()->setTemplateParameterListsInfo(Context, TPLists);
1795}
1796
1797SourceLocation DeclaratorDecl::getOuterLocStart() const {
1798 return getTemplateOrInnerLocStart(this);
1799}
1800
1801// Helper function: returns true if QT is or contains a type
1802// having a postfix component.
1803static bool typeIsPostfix(QualType QT) {
1804 while (true) {
1805 const Type* T = QT.getTypePtr();
1806 switch (T->getTypeClass()) {
1807 default:
1808 return false;
1809 case Type::Pointer:
1810 QT = cast<PointerType>(T)->getPointeeType();
1811 break;
1812 case Type::BlockPointer:
1813 QT = cast<BlockPointerType>(T)->getPointeeType();
1814 break;
1815 case Type::MemberPointer:
1816 QT = cast<MemberPointerType>(T)->getPointeeType();
1817 break;
1818 case Type::LValueReference:
1819 case Type::RValueReference:
1820 QT = cast<ReferenceType>(T)->getPointeeType();
1821 break;
1822 case Type::PackExpansion:
1823 QT = cast<PackExpansionType>(T)->getPattern();
1824 break;
1825 case Type::Paren:
1826 case Type::ConstantArray:
1827 case Type::DependentSizedArray:
1828 case Type::IncompleteArray:
1829 case Type::VariableArray:
1830 case Type::FunctionProto:
1831 case Type::FunctionNoProto:
1832 return true;
1833 }
1834 }
1835}
1836
1837SourceRange DeclaratorDecl::getSourceRange() const {
1838 SourceLocation RangeEnd = getLocation();
1839 if (TypeSourceInfo *TInfo = getTypeSourceInfo()) {
1840 // If the declaration has no name or the type extends past the name take the
1841 // end location of the type.
1842 if (!getDeclName() || typeIsPostfix(TInfo->getType()))
1843 RangeEnd = TInfo->getTypeLoc().getSourceRange().getEnd();
1844 }
1845 return SourceRange(getOuterLocStart(), RangeEnd);
1846}
1847
1848void QualifierInfo::setTemplateParameterListsInfo(
1849 ASTContext &Context, ArrayRef<TemplateParameterList *> TPLists) {
1850 // Free previous template parameters (if any).
1851 if (NumTemplParamLists > 0) {
1852 Context.Deallocate(TemplParamLists);
1853 TemplParamLists = nullptr;
1854 NumTemplParamLists = 0;
1855 }
1856 // Set info on matched template parameter lists (if any).
1857 if (!TPLists.empty()) {
1858 TemplParamLists = new (Context) TemplateParameterList *[TPLists.size()];
1859 NumTemplParamLists = TPLists.size();
1860 std::copy(TPLists.begin(), TPLists.end(), TemplParamLists);
1861 }
1862}
1863
1864//===----------------------------------------------------------------------===//
1865// VarDecl Implementation
1866//===----------------------------------------------------------------------===//
1867
1868const char *VarDecl::getStorageClassSpecifierString(StorageClass SC) {
1869 switch (SC) {
1870 case SC_None: break;
1871 case SC_Auto: return "auto";
1872 case SC_Extern: return "extern";
1873 case SC_PrivateExtern: return "__private_extern__";
1874 case SC_Register: return "register";
1875 case SC_Static: return "static";
1876 }
1877
1878 llvm_unreachable("Invalid storage class")::llvm::llvm_unreachable_internal("Invalid storage class", "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 1878)
;
1879}
1880
1881VarDecl::VarDecl(Kind DK, ASTContext &C, DeclContext *DC,
1882 SourceLocation StartLoc, SourceLocation IdLoc,
1883 IdentifierInfo *Id, QualType T, TypeSourceInfo *TInfo,
1884 StorageClass SC)
1885 : DeclaratorDecl(DK, DC, IdLoc, Id, T, TInfo, StartLoc),
1886 redeclarable_base(C) {
1887 static_assert(sizeof(VarDeclBitfields) <= sizeof(unsigned),
1888 "VarDeclBitfields too large!");
1889 static_assert(sizeof(ParmVarDeclBitfields) <= sizeof(unsigned),
1890 "ParmVarDeclBitfields too large!");
1891 static_assert(sizeof(NonParmVarDeclBitfields) <= sizeof(unsigned),
1892 "NonParmVarDeclBitfields too large!");
1893 AllBits = 0;
1894 VarDeclBits.SClass = SC;
1895 // Everything else is implicitly initialized to false.
1896}
1897
1898VarDecl *VarDecl::Create(ASTContext &C, DeclContext *DC,
1899 SourceLocation StartL, SourceLocation IdL,
1900 IdentifierInfo *Id, QualType T, TypeSourceInfo *TInfo,
1901 StorageClass S) {
1902 return new (C, DC) VarDecl(Var, C, DC, StartL, IdL, Id, T, TInfo, S);
1903}
1904
1905VarDecl *VarDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
1906 return new (C, ID)
1907 VarDecl(Var, C, nullptr, SourceLocation(), SourceLocation(), nullptr,
1908 QualType(), nullptr, SC_None);
1909}
1910
1911void VarDecl::setStorageClass(StorageClass SC) {
1912 assert(isLegalForVariable(SC))(static_cast <bool> (isLegalForVariable(SC)) ? void (0)
: __assert_fail ("isLegalForVariable(SC)", "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 1912, __extension__ __PRETTY_FUNCTION__))
;
1913 VarDeclBits.SClass = SC;
1914}
1915
1916VarDecl::TLSKind VarDecl::getTLSKind() const {
1917 switch (VarDeclBits.TSCSpec) {
1918 case TSCS_unspecified:
1919 if (!hasAttr<ThreadAttr>() &&
1920 !(getASTContext().getLangOpts().OpenMPUseTLS &&
1921 getASTContext().getTargetInfo().isTLSSupported() &&
1922 hasAttr<OMPThreadPrivateDeclAttr>()))
1923 return TLS_None;
1924 return ((getASTContext().getLangOpts().isCompatibleWithMSVC(
1925 LangOptions::MSVC2015)) ||
1926 hasAttr<OMPThreadPrivateDeclAttr>())
1927 ? TLS_Dynamic
1928 : TLS_Static;
1929 case TSCS___thread: // Fall through.
1930 case TSCS__Thread_local:
1931 return TLS_Static;
1932 case TSCS_thread_local:
1933 return TLS_Dynamic;
1934 }
1935 llvm_unreachable("Unknown thread storage class specifier!")::llvm::llvm_unreachable_internal("Unknown thread storage class specifier!"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 1935)
;
1936}
1937
1938SourceRange VarDecl::getSourceRange() const {
1939 if (const Expr *Init = getInit()) {
1940 SourceLocation InitEnd = Init->getLocEnd();
1941 // If Init is implicit, ignore its source range and fallback on
1942 // DeclaratorDecl::getSourceRange() to handle postfix elements.
1943 if (InitEnd.isValid() && InitEnd != getLocation())
1944 return SourceRange(getOuterLocStart(), InitEnd);
1945 }
1946 return DeclaratorDecl::getSourceRange();
1947}
1948
1949template<typename T>
1950static LanguageLinkage getDeclLanguageLinkage(const T &D) {
1951 // C++ [dcl.link]p1: All function types, function names with external linkage,
1952 // and variable names with external linkage have a language linkage.
1953 if (!D.hasExternalFormalLinkage())
1954 return NoLanguageLinkage;
1955
1956 // Language linkage is a C++ concept, but saying that everything else in C has
1957 // C language linkage fits the implementation nicely.
1958 ASTContext &Context = D.getASTContext();
1959 if (!Context.getLangOpts().CPlusPlus)
1960 return CLanguageLinkage;
1961
1962 // C++ [dcl.link]p4: A C language linkage is ignored in determining the
1963 // language linkage of the names of class members and the function type of
1964 // class member functions.
1965 const DeclContext *DC = D.getDeclContext();
1966 if (DC->isRecord())
1967 return CXXLanguageLinkage;
1968
1969 // If the first decl is in an extern "C" context, any other redeclaration
1970 // will have C language linkage. If the first one is not in an extern "C"
1971 // context, we would have reported an error for any other decl being in one.
1972 if (isFirstInExternCContext(&D))
1973 return CLanguageLinkage;
1974 return CXXLanguageLinkage;
1975}
1976
1977template<typename T>
1978static bool isDeclExternC(const T &D) {
1979 // Since the context is ignored for class members, they can only have C++
1980 // language linkage or no language linkage.
1981 const DeclContext *DC = D.getDeclContext();
1982 if (DC->isRecord()) {
1983 assert(D.getASTContext().getLangOpts().CPlusPlus)(static_cast <bool> (D.getASTContext().getLangOpts().CPlusPlus
) ? void (0) : __assert_fail ("D.getASTContext().getLangOpts().CPlusPlus"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 1983, __extension__ __PRETTY_FUNCTION__))
;
1984 return false;
1985 }
1986
1987 return D.getLanguageLinkage() == CLanguageLinkage;
1988}
1989
1990LanguageLinkage VarDecl::getLanguageLinkage() const {
1991 return getDeclLanguageLinkage(*this);
1992}
1993
1994bool VarDecl::isExternC() const {
1995 return isDeclExternC(*this);
1996}
1997
1998bool VarDecl::isInExternCContext() const {
1999 return getLexicalDeclContext()->isExternCContext();
2000}
2001
2002bool VarDecl::isInExternCXXContext() const {
2003 return getLexicalDeclContext()->isExternCXXContext();
2004}
2005
2006VarDecl *VarDecl::getCanonicalDecl() { return getFirstDecl(); }
2007
2008VarDecl::DefinitionKind
2009VarDecl::isThisDeclarationADefinition(ASTContext &C) const {
2010 if (isThisDeclarationADemotedDefinition())
2011 return DeclarationOnly;
2012
2013 // C++ [basic.def]p2:
2014 // A declaration is a definition unless [...] it contains the 'extern'
2015 // specifier or a linkage-specification and neither an initializer [...],
2016 // it declares a non-inline static data member in a class declaration [...],
2017 // it declares a static data member outside a class definition and the variable
2018 // was defined within the class with the constexpr specifier [...],
2019 // C++1y [temp.expl.spec]p15:
2020 // An explicit specialization of a static data member or an explicit
2021 // specialization of a static data member template is a definition if the
2022 // declaration includes an initializer; otherwise, it is a declaration.
2023 //
2024 // FIXME: How do you declare (but not define) a partial specialization of
2025 // a static data member template outside the containing class?
2026 if (isStaticDataMember()) {
2027 if (isOutOfLine() &&
2028 !(getCanonicalDecl()->isInline() &&
2029 getCanonicalDecl()->isConstexpr()) &&
2030 (hasInit() ||
2031 // If the first declaration is out-of-line, this may be an
2032 // instantiation of an out-of-line partial specialization of a variable
2033 // template for which we have not yet instantiated the initializer.
2034 (getFirstDecl()->isOutOfLine()
2035 ? getTemplateSpecializationKind() == TSK_Undeclared
2036 : getTemplateSpecializationKind() !=
2037 TSK_ExplicitSpecialization) ||
2038 isa<VarTemplatePartialSpecializationDecl>(this)))
2039 return Definition;
2040 else if (!isOutOfLine() && isInline())
2041 return Definition;
2042 else
2043 return DeclarationOnly;
2044 }
2045 // C99 6.7p5:
2046 // A definition of an identifier is a declaration for that identifier that
2047 // [...] causes storage to be reserved for that object.
2048 // Note: that applies for all non-file-scope objects.
2049 // C99 6.9.2p1:
2050 // If the declaration of an identifier for an object has file scope and an
2051 // initializer, the declaration is an external definition for the identifier
2052 if (hasInit())
2053 return Definition;
2054
2055 if (hasDefiningAttr())
2056 return Definition;
2057
2058 if (const auto *SAA = getAttr<SelectAnyAttr>())
2059 if (!SAA->isInherited())
2060 return Definition;
2061
2062 // A variable template specialization (other than a static data member
2063 // template or an explicit specialization) is a declaration until we
2064 // instantiate its initializer.
2065 if (auto *VTSD = dyn_cast<VarTemplateSpecializationDecl>(this)) {
2066 if (VTSD->getTemplateSpecializationKind() != TSK_ExplicitSpecialization &&
2067 !isa<VarTemplatePartialSpecializationDecl>(VTSD) &&
2068 !VTSD->IsCompleteDefinition)
2069 return DeclarationOnly;
2070 }
2071
2072 if (hasExternalStorage())
2073 return DeclarationOnly;
2074
2075 // [dcl.link] p7:
2076 // A declaration directly contained in a linkage-specification is treated
2077 // as if it contains the extern specifier for the purpose of determining
2078 // the linkage of the declared name and whether it is a definition.
2079 if (isSingleLineLanguageLinkage(*this))
2080 return DeclarationOnly;
2081
2082 // C99 6.9.2p2:
2083 // A declaration of an object that has file scope without an initializer,
2084 // and without a storage class specifier or the scs 'static', constitutes
2085 // a tentative definition.
2086 // No such thing in C++.
2087 if (!C.getLangOpts().CPlusPlus && isFileVarDecl())
2088 return TentativeDefinition;
2089
2090 // What's left is (in C, block-scope) declarations without initializers or
2091 // external storage. These are definitions.
2092 return Definition;
2093}
2094
2095VarDecl *VarDecl::getActingDefinition() {
2096 DefinitionKind Kind = isThisDeclarationADefinition();
2097 if (Kind != TentativeDefinition)
2098 return nullptr;
2099
2100 VarDecl *LastTentative = nullptr;
2101 VarDecl *First = getFirstDecl();
2102 for (auto I : First->redecls()) {
2103 Kind = I->isThisDeclarationADefinition();
2104 if (Kind == Definition)
2105 return nullptr;
2106 else if (Kind == TentativeDefinition)
2107 LastTentative = I;
2108 }
2109 return LastTentative;
2110}
2111
2112VarDecl *VarDecl::getDefinition(ASTContext &C) {
2113 VarDecl *First = getFirstDecl();
2114 for (auto I : First->redecls()) {
2115 if (I->isThisDeclarationADefinition(C) == Definition)
2116 return I;
2117 }
2118 return nullptr;
2119}
2120
2121VarDecl::DefinitionKind VarDecl::hasDefinition(ASTContext &C) const {
2122 DefinitionKind Kind = DeclarationOnly;
2123
2124 const VarDecl *First = getFirstDecl();
2125 for (auto I : First->redecls()) {
2126 Kind = std::max(Kind, I->isThisDeclarationADefinition(C));
2127 if (Kind == Definition)
2128 break;
2129 }
2130
2131 return Kind;
2132}
2133
2134const Expr *VarDecl::getAnyInitializer(const VarDecl *&D) const {
2135 for (auto I : redecls()) {
2136 if (auto Expr = I->getInit()) {
2137 D = I;
2138 return Expr;
2139 }
2140 }
2141 return nullptr;
2142}
2143
2144bool VarDecl::hasInit() const {
2145 if (auto *P = dyn_cast<ParmVarDecl>(this))
2146 if (P->hasUnparsedDefaultArg() || P->hasUninstantiatedDefaultArg())
2147 return false;
2148
2149 return !Init.isNull();
2150}
2151
2152Expr *VarDecl::getInit() {
2153 if (!hasInit())
2154 return nullptr;
2155
2156 if (auto *S = Init.dyn_cast<Stmt *>())
2157 return cast<Expr>(S);
2158
2159 return cast_or_null<Expr>(Init.get<EvaluatedStmt *>()->Value);
2160}
2161
2162Stmt **VarDecl::getInitAddress() {
2163 if (auto *ES = Init.dyn_cast<EvaluatedStmt *>())
2164 return &ES->Value;
2165
2166 return Init.getAddrOfPtr1();
2167}
2168
2169bool VarDecl::isOutOfLine() const {
2170 if (Decl::isOutOfLine())
2171 return true;
2172
2173 if (!isStaticDataMember())
2174 return false;
2175
2176 // If this static data member was instantiated from a static data member of
2177 // a class template, check whether that static data member was defined
2178 // out-of-line.
2179 if (VarDecl *VD = getInstantiatedFromStaticDataMember())
2180 return VD->isOutOfLine();
2181
2182 return false;
2183}
2184
2185void VarDecl::setInit(Expr *I) {
2186 if (auto *Eval = Init.dyn_cast<EvaluatedStmt *>()) {
2187 Eval->~EvaluatedStmt();
2188 getASTContext().Deallocate(Eval);
2189 }
2190
2191 Init = I;
2192}
2193
2194bool VarDecl::isUsableInConstantExpressions(ASTContext &C) const {
2195 const LangOptions &Lang = C.getLangOpts();
2196
2197 if (!Lang.CPlusPlus)
2198 return false;
2199
2200 // In C++11, any variable of reference type can be used in a constant
2201 // expression if it is initialized by a constant expression.
2202 if (Lang.CPlusPlus11 && getType()->isReferenceType())
2203 return true;
2204
2205 // Only const objects can be used in constant expressions in C++. C++98 does
2206 // not require the variable to be non-volatile, but we consider this to be a
2207 // defect.
2208 if (!getType().isConstQualified() || getType().isVolatileQualified())
2209 return false;
2210
2211 // In C++, const, non-volatile variables of integral or enumeration types
2212 // can be used in constant expressions.
2213 if (getType()->isIntegralOrEnumerationType())
2214 return true;
2215
2216 // Additionally, in C++11, non-volatile constexpr variables can be used in
2217 // constant expressions.
2218 return Lang.CPlusPlus11 && isConstexpr();
2219}
2220
2221/// Convert the initializer for this declaration to the elaborated EvaluatedStmt
2222/// form, which contains extra information on the evaluated value of the
2223/// initializer.
2224EvaluatedStmt *VarDecl::ensureEvaluatedStmt() const {
2225 auto *Eval = Init.dyn_cast<EvaluatedStmt *>();
2226 if (!Eval) {
2227 // Note: EvaluatedStmt contains an APValue, which usually holds
2228 // resources not allocated from the ASTContext. We need to do some
2229 // work to avoid leaking those, but we do so in VarDecl::evaluateValue
2230 // where we can detect whether there's anything to clean up or not.
2231 Eval = new (getASTContext()) EvaluatedStmt;
2232 Eval->Value = Init.get<Stmt *>();
2233 Init = Eval;
2234 }
2235 return Eval;
2236}
2237
2238APValue *VarDecl::evaluateValue() const {
2239 SmallVector<PartialDiagnosticAt, 8> Notes;
2240 return evaluateValue(Notes);
2241}
2242
2243APValue *VarDecl::evaluateValue(
2244 SmallVectorImpl<PartialDiagnosticAt> &Notes) const {
2245 EvaluatedStmt *Eval = ensureEvaluatedStmt();
2246
2247 // We only produce notes indicating why an initializer is non-constant the
2248 // first time it is evaluated. FIXME: The notes won't always be emitted the
2249 // first time we try evaluation, so might not be produced at all.
2250 if (Eval->WasEvaluated)
2251 return Eval->Evaluated.isUninit() ? nullptr : &Eval->Evaluated;
2252
2253 const auto *Init = cast<Expr>(Eval->Value);
2254 assert(!Init->isValueDependent())(static_cast <bool> (!Init->isValueDependent()) ? void
(0) : __assert_fail ("!Init->isValueDependent()", "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 2254, __extension__ __PRETTY_FUNCTION__))
;
2255
2256 if (Eval->IsEvaluating) {
2257 // FIXME: Produce a diagnostic for self-initialization.
2258 Eval->CheckedICE = true;
2259 Eval->IsICE = false;
2260 return nullptr;
2261 }
2262
2263 Eval->IsEvaluating = true;
2264
2265 bool Result = Init->EvaluateAsInitializer(Eval->Evaluated, getASTContext(),
2266 this, Notes);
2267
2268 // Ensure the computed APValue is cleaned up later if evaluation succeeded,
2269 // or that it's empty (so that there's nothing to clean up) if evaluation
2270 // failed.
2271 if (!Result)
2272 Eval->Evaluated = APValue();
2273 else if (Eval->Evaluated.needsCleanup())
2274 getASTContext().addDestruction(&Eval->Evaluated);
2275
2276 Eval->IsEvaluating = false;
2277 Eval->WasEvaluated = true;
2278
2279 // In C++11, we have determined whether the initializer was a constant
2280 // expression as a side-effect.
2281 if (getASTContext().getLangOpts().CPlusPlus11 && !Eval->CheckedICE) {
2282 Eval->CheckedICE = true;
2283 Eval->IsICE = Result && Notes.empty();
2284 }
2285
2286 return Result ? &Eval->Evaluated : nullptr;
2287}
2288
2289APValue *VarDecl::getEvaluatedValue() const {
2290 if (EvaluatedStmt *Eval = Init.dyn_cast<EvaluatedStmt *>())
2291 if (Eval->WasEvaluated)
2292 return &Eval->Evaluated;
2293
2294 return nullptr;
2295}
2296
2297bool VarDecl::isInitKnownICE() const {
2298 if (EvaluatedStmt *Eval = Init.dyn_cast<EvaluatedStmt *>())
2299 return Eval->CheckedICE;
2300
2301 return false;
2302}
2303
2304bool VarDecl::isInitICE() const {
2305 assert(isInitKnownICE() &&(static_cast <bool> (isInitKnownICE() && "Check whether we already know that the initializer is an ICE"
) ? void (0) : __assert_fail ("isInitKnownICE() && \"Check whether we already know that the initializer is an ICE\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 2306, __extension__ __PRETTY_FUNCTION__))
2306 "Check whether we already know that the initializer is an ICE")(static_cast <bool> (isInitKnownICE() && "Check whether we already know that the initializer is an ICE"
) ? void (0) : __assert_fail ("isInitKnownICE() && \"Check whether we already know that the initializer is an ICE\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 2306, __extension__ __PRETTY_FUNCTION__))
;
2307 return Init.get<EvaluatedStmt *>()->IsICE;
2308}
2309
2310bool VarDecl::checkInitIsICE() const {
2311 // Initializers of weak variables are never ICEs.
2312 if (isWeak())
2313 return false;
2314
2315 EvaluatedStmt *Eval = ensureEvaluatedStmt();
2316 if (Eval->CheckedICE)
2317 // We have already checked whether this subexpression is an
2318 // integral constant expression.
2319 return Eval->IsICE;
2320
2321 const auto *Init = cast<Expr>(Eval->Value);
2322 assert(!Init->isValueDependent())(static_cast <bool> (!Init->isValueDependent()) ? void
(0) : __assert_fail ("!Init->isValueDependent()", "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 2322, __extension__ __PRETTY_FUNCTION__))
;
2323
2324 // In C++11, evaluate the initializer to check whether it's a constant
2325 // expression.
2326 if (getASTContext().getLangOpts().CPlusPlus11) {
2327 SmallVector<PartialDiagnosticAt, 8> Notes;
2328 evaluateValue(Notes);
2329 return Eval->IsICE;
2330 }
2331
2332 // It's an ICE whether or not the definition we found is
2333 // out-of-line. See DR 721 and the discussion in Clang PR
2334 // 6206 for details.
2335
2336 if (Eval->CheckingICE)
2337 return false;
2338 Eval->CheckingICE = true;
2339
2340 Eval->IsICE = Init->isIntegerConstantExpr(getASTContext());
2341 Eval->CheckingICE = false;
2342 Eval->CheckedICE = true;
2343 return Eval->IsICE;
2344}
2345
2346template<typename DeclT>
2347static DeclT *getDefinitionOrSelf(DeclT *D) {
2348 assert(D)(static_cast <bool> (D) ? void (0) : __assert_fail ("D"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 2348, __extension__ __PRETTY_FUNCTION__))
;
2349 if (auto *Def = D->getDefinition())
2350 return Def;
2351 return D;
2352}
2353
2354VarDecl *VarDecl::getTemplateInstantiationPattern() const {
2355 // If it's a variable template specialization, find the template or partial
2356 // specialization from which it was instantiated.
2357 if (auto *VDTemplSpec = dyn_cast<VarTemplateSpecializationDecl>(this)) {
2358 auto From = VDTemplSpec->getInstantiatedFrom();
2359 if (auto *VTD = From.dyn_cast<VarTemplateDecl *>()) {
2360 while (auto *NewVTD = VTD->getInstantiatedFromMemberTemplate()) {
2361 if (NewVTD->isMemberSpecialization())
2362 break;
2363 VTD = NewVTD;
2364 }
2365 return getDefinitionOrSelf(VTD->getTemplatedDecl());
2366 }
2367 if (auto *VTPSD =
2368 From.dyn_cast<VarTemplatePartialSpecializationDecl *>()) {
2369 while (auto *NewVTPSD = VTPSD->getInstantiatedFromMember()) {
2370 if (NewVTPSD->isMemberSpecialization())
2371 break;
2372 VTPSD = NewVTPSD;
2373 }
2374 return getDefinitionOrSelf<VarDecl>(VTPSD);
2375 }
2376 }
2377
2378 if (MemberSpecializationInfo *MSInfo = getMemberSpecializationInfo()) {
2379 if (isTemplateInstantiation(MSInfo->getTemplateSpecializationKind())) {
2380 VarDecl *VD = getInstantiatedFromStaticDataMember();
2381 while (auto *NewVD = VD->getInstantiatedFromStaticDataMember())
2382 VD = NewVD;
2383 return getDefinitionOrSelf(VD);
2384 }
2385 }
2386
2387 if (VarTemplateDecl *VarTemplate = getDescribedVarTemplate()) {
2388 while (VarTemplate->getInstantiatedFromMemberTemplate()) {
2389 if (VarTemplate->isMemberSpecialization())
2390 break;
2391 VarTemplate = VarTemplate->getInstantiatedFromMemberTemplate();
2392 }
2393
2394 return getDefinitionOrSelf(VarTemplate->getTemplatedDecl());
2395 }
2396 return nullptr;
2397}
2398
2399VarDecl *VarDecl::getInstantiatedFromStaticDataMember() const {
2400 if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo())
2401 return cast<VarDecl>(MSI->getInstantiatedFrom());
2402
2403 return nullptr;
2404}
2405
2406TemplateSpecializationKind VarDecl::getTemplateSpecializationKind() const {
2407 if (const auto *Spec = dyn_cast<VarTemplateSpecializationDecl>(this))
2408 return Spec->getSpecializationKind();
2409
2410 if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo())
2411 return MSI->getTemplateSpecializationKind();
2412
2413 return TSK_Undeclared;
2414}
2415
2416SourceLocation VarDecl::getPointOfInstantiation() const {
2417 if (const auto *Spec = dyn_cast<VarTemplateSpecializationDecl>(this))
2418 return Spec->getPointOfInstantiation();
2419
2420 if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo())
2421 return MSI->getPointOfInstantiation();
2422
2423 return SourceLocation();
2424}
2425
2426VarTemplateDecl *VarDecl::getDescribedVarTemplate() const {
2427 return getASTContext().getTemplateOrSpecializationInfo(this)
2428 .dyn_cast<VarTemplateDecl *>();
2429}
2430
2431void VarDecl::setDescribedVarTemplate(VarTemplateDecl *Template) {
2432 getASTContext().setTemplateOrSpecializationInfo(this, Template);
2433}
2434
2435bool VarDecl::isKnownToBeDefined() const {
2436 const auto &LangOpts = getASTContext().getLangOpts();
2437 // In CUDA mode without relocatable device code, variables of form 'extern
2438 // __shared__ Foo foo[]' are pointers to the base of the GPU core's shared
2439 // memory pool. These are never undefined variables, even if they appear
2440 // inside of an anon namespace or static function.
2441 //
2442 // With CUDA relocatable device code enabled, these variables don't get
2443 // special handling; they're treated like regular extern variables.
2444 if (LangOpts.CUDA && !LangOpts.CUDARelocatableDeviceCode &&
2445 hasExternalStorage() && hasAttr<CUDASharedAttr>() &&
2446 isa<IncompleteArrayType>(getType()))
2447 return true;
2448
2449 return hasDefinition();
2450}
2451
2452MemberSpecializationInfo *VarDecl::getMemberSpecializationInfo() const {
2453 if (isStaticDataMember())
2454 // FIXME: Remove ?
2455 // return getASTContext().getInstantiatedFromStaticDataMember(this);
2456 return getASTContext().getTemplateOrSpecializationInfo(this)
2457 .dyn_cast<MemberSpecializationInfo *>();
2458 return nullptr;
2459}
2460
2461void VarDecl::setTemplateSpecializationKind(TemplateSpecializationKind TSK,
2462 SourceLocation PointOfInstantiation) {
2463 assert((isa<VarTemplateSpecializationDecl>(this) ||(static_cast <bool> ((isa<VarTemplateSpecializationDecl
>(this) || getMemberSpecializationInfo()) && "not a variable or static data member template specialization"
) ? void (0) : __assert_fail ("(isa<VarTemplateSpecializationDecl>(this) || getMemberSpecializationInfo()) && \"not a variable or static data member template specialization\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 2465, __extension__ __PRETTY_FUNCTION__))
2464 getMemberSpecializationInfo()) &&(static_cast <bool> ((isa<VarTemplateSpecializationDecl
>(this) || getMemberSpecializationInfo()) && "not a variable or static data member template specialization"
) ? void (0) : __assert_fail ("(isa<VarTemplateSpecializationDecl>(this) || getMemberSpecializationInfo()) && \"not a variable or static data member template specialization\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 2465, __extension__ __PRETTY_FUNCTION__))
2465 "not a variable or static data member template specialization")(static_cast <bool> ((isa<VarTemplateSpecializationDecl
>(this) || getMemberSpecializationInfo()) && "not a variable or static data member template specialization"
) ? void (0) : __assert_fail ("(isa<VarTemplateSpecializationDecl>(this) || getMemberSpecializationInfo()) && \"not a variable or static data member template specialization\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 2465, __extension__ __PRETTY_FUNCTION__))
;
2466
2467 if (VarTemplateSpecializationDecl *Spec =
2468 dyn_cast<VarTemplateSpecializationDecl>(this)) {
2469 Spec->setSpecializationKind(TSK);
2470 if (TSK != TSK_ExplicitSpecialization && PointOfInstantiation.isValid() &&
2471 Spec->getPointOfInstantiation().isInvalid()) {
2472 Spec->setPointOfInstantiation(PointOfInstantiation);
2473 if (ASTMutationListener *L = getASTContext().getASTMutationListener())
2474 L->InstantiationRequested(this);
2475 }
2476 }
2477
2478 if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo()) {
2479 MSI->setTemplateSpecializationKind(TSK);
2480 if (TSK != TSK_ExplicitSpecialization && PointOfInstantiation.isValid() &&
2481 MSI->getPointOfInstantiation().isInvalid()) {
2482 MSI->setPointOfInstantiation(PointOfInstantiation);
2483 if (ASTMutationListener *L = getASTContext().getASTMutationListener())
2484 L->InstantiationRequested(this);
2485 }
2486 }
2487}
2488
2489void
2490VarDecl::setInstantiationOfStaticDataMember(VarDecl *VD,
2491 TemplateSpecializationKind TSK) {
2492 assert(getASTContext().getTemplateOrSpecializationInfo(this).isNull() &&(static_cast <bool> (getASTContext().getTemplateOrSpecializationInfo
(this).isNull() && "Previous template or instantiation?"
) ? void (0) : __assert_fail ("getASTContext().getTemplateOrSpecializationInfo(this).isNull() && \"Previous template or instantiation?\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 2493, __extension__ __PRETTY_FUNCTION__))
2493 "Previous template or instantiation?")(static_cast <bool> (getASTContext().getTemplateOrSpecializationInfo
(this).isNull() && "Previous template or instantiation?"
) ? void (0) : __assert_fail ("getASTContext().getTemplateOrSpecializationInfo(this).isNull() && \"Previous template or instantiation?\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 2493, __extension__ __PRETTY_FUNCTION__))
;
2494 getASTContext().setInstantiatedFromStaticDataMember(this, VD, TSK);
2495}
2496
2497//===----------------------------------------------------------------------===//
2498// ParmVarDecl Implementation
2499//===----------------------------------------------------------------------===//
2500
2501ParmVarDecl *ParmVarDecl::Create(ASTContext &C, DeclContext *DC,
2502 SourceLocation StartLoc,
2503 SourceLocation IdLoc, IdentifierInfo *Id,
2504 QualType T, TypeSourceInfo *TInfo,
2505 StorageClass S, Expr *DefArg) {
2506 return new (C, DC) ParmVarDecl(ParmVar, C, DC, StartLoc, IdLoc, Id, T, TInfo,
2507 S, DefArg);
2508}
2509
2510QualType ParmVarDecl::getOriginalType() const {
2511 TypeSourceInfo *TSI = getTypeSourceInfo();
2512 QualType T = TSI ? TSI->getType() : getType();
2513 if (const auto *DT = dyn_cast<DecayedType>(T))
2514 return DT->getOriginalType();
2515 return T;
2516}
2517
2518ParmVarDecl *ParmVarDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2519 return new (C, ID)
2520 ParmVarDecl(ParmVar, C, nullptr, SourceLocation(), SourceLocation(),
2521 nullptr, QualType(), nullptr, SC_None, nullptr);
2522}
2523
2524SourceRange ParmVarDecl::getSourceRange() const {
2525 if (!hasInheritedDefaultArg()) {
2526 SourceRange ArgRange = getDefaultArgRange();
2527 if (ArgRange.isValid())
2528 return SourceRange(getOuterLocStart(), ArgRange.getEnd());
2529 }
2530
2531 // DeclaratorDecl considers the range of postfix types as overlapping with the
2532 // declaration name, but this is not the case with parameters in ObjC methods.
2533 if (isa<ObjCMethodDecl>(getDeclContext()))
2534 return SourceRange(DeclaratorDecl::getLocStart(), getLocation());
2535
2536 return DeclaratorDecl::getSourceRange();
2537}
2538
2539Expr *ParmVarDecl::getDefaultArg() {
2540 assert(!hasUnparsedDefaultArg() && "Default argument is not yet parsed!")(static_cast <bool> (!hasUnparsedDefaultArg() &&
"Default argument is not yet parsed!") ? void (0) : __assert_fail
("!hasUnparsedDefaultArg() && \"Default argument is not yet parsed!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 2540, __extension__ __PRETTY_FUNCTION__))
;
2541 assert(!hasUninstantiatedDefaultArg() &&(static_cast <bool> (!hasUninstantiatedDefaultArg() &&
"Default argument is not yet instantiated!") ? void (0) : __assert_fail
("!hasUninstantiatedDefaultArg() && \"Default argument is not yet instantiated!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 2542, __extension__ __PRETTY_FUNCTION__))
2542 "Default argument is not yet instantiated!")(static_cast <bool> (!hasUninstantiatedDefaultArg() &&
"Default argument is not yet instantiated!") ? void (0) : __assert_fail
("!hasUninstantiatedDefaultArg() && \"Default argument is not yet instantiated!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 2542, __extension__ __PRETTY_FUNCTION__))
;
2543
2544 Expr *Arg = getInit();
2545 if (auto *E = dyn_cast_or_null<ExprWithCleanups>(Arg))
2546 return E->getSubExpr();
2547
2548 return Arg;
2549}
2550
2551void ParmVarDecl::setDefaultArg(Expr *defarg) {
2552 ParmVarDeclBits.DefaultArgKind = DAK_Normal;
2553 Init = defarg;
2554}
2555
2556SourceRange ParmVarDecl::getDefaultArgRange() const {
2557 switch (ParmVarDeclBits.DefaultArgKind) {
2558 case DAK_None:
2559 case DAK_Unparsed:
2560 // Nothing we can do here.
2561 return SourceRange();
2562
2563 case DAK_Uninstantiated:
2564 return getUninstantiatedDefaultArg()->getSourceRange();
2565
2566 case DAK_Normal:
2567 if (const Expr *E = getInit())
2568 return E->getSourceRange();
2569
2570 // Missing an actual expression, may be invalid.
2571 return SourceRange();
2572 }
2573 llvm_unreachable("Invalid default argument kind.")::llvm::llvm_unreachable_internal("Invalid default argument kind."
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 2573)
;
2574}
2575
2576void ParmVarDecl::setUninstantiatedDefaultArg(Expr *arg) {
2577 ParmVarDeclBits.DefaultArgKind = DAK_Uninstantiated;
2578 Init = arg;
2579}
2580
2581Expr *ParmVarDecl::getUninstantiatedDefaultArg() {
2582 assert(hasUninstantiatedDefaultArg() &&(static_cast <bool> (hasUninstantiatedDefaultArg() &&
"Wrong kind of initialization expression!") ? void (0) : __assert_fail
("hasUninstantiatedDefaultArg() && \"Wrong kind of initialization expression!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 2583, __extension__ __PRETTY_FUNCTION__))
2583 "Wrong kind of initialization expression!")(static_cast <bool> (hasUninstantiatedDefaultArg() &&
"Wrong kind of initialization expression!") ? void (0) : __assert_fail
("hasUninstantiatedDefaultArg() && \"Wrong kind of initialization expression!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 2583, __extension__ __PRETTY_FUNCTION__))
;
2584 return cast_or_null<Expr>(Init.get<Stmt *>());
2585}
2586
2587bool ParmVarDecl::hasDefaultArg() const {
2588 // FIXME: We should just return false for DAK_None here once callers are
2589 // prepared for the case that we encountered an invalid default argument and
2590 // were unable to even build an invalid expression.
2591 return hasUnparsedDefaultArg() || hasUninstantiatedDefaultArg() ||
2592 !Init.isNull();
2593}
2594
2595bool ParmVarDecl::isParameterPack() const {
2596 return isa<PackExpansionType>(getType());
2597}
2598
2599void ParmVarDecl::setParameterIndexLarge(unsigned parameterIndex) {
2600 getASTContext().setParameterIndex(this, parameterIndex);
2601 ParmVarDeclBits.ParameterIndex = ParameterIndexSentinel;
2602}
2603
2604unsigned ParmVarDecl::getParameterIndexLarge() const {
2605 return getASTContext().getParameterIndex(this);
2606}
2607
2608//===----------------------------------------------------------------------===//
2609// FunctionDecl Implementation
2610//===----------------------------------------------------------------------===//
2611
2612void FunctionDecl::getNameForDiagnostic(
2613 raw_ostream &OS, const PrintingPolicy &Policy, bool Qualified) const {
2614 NamedDecl::getNameForDiagnostic(OS, Policy, Qualified);
2615 const TemplateArgumentList *TemplateArgs = getTemplateSpecializationArgs();
2616 if (TemplateArgs)
2617 printTemplateArgumentList(OS, TemplateArgs->asArray(), Policy);
2618}
2619
2620bool FunctionDecl::isVariadic() const {
2621 if (const auto *FT = getType()->getAs<FunctionProtoType>())
2622 return FT->isVariadic();
2623 return false;
2624}
2625
2626bool FunctionDecl::hasBody(const FunctionDecl *&Definition) const {
2627 for (auto I : redecls()) {
2628 if (I->doesThisDeclarationHaveABody()) {
2629 Definition = I;
2630 return true;
2631 }
2632 }
2633
2634 return false;
2635}
2636
2637bool FunctionDecl::hasTrivialBody() const
2638{
2639 Stmt *S = getBody();
2640 if (!S) {
2641 // Since we don't have a body for this function, we don't know if it's
2642 // trivial or not.
2643 return false;
2644 }
2645
2646 if (isa<CompoundStmt>(S) && cast<CompoundStmt>(S)->body_empty())
2647 return true;
2648 return false;
2649}
2650
2651bool FunctionDecl::isDefined(const FunctionDecl *&Definition) const {
2652 for (auto I : redecls()) {
2653 if (I->isThisDeclarationADefinition()) {
2654 Definition = I;
2655 return true;
2656 }
2657 }
2658
2659 return false;
2660}
2661
2662Stmt *FunctionDecl::getBody(const FunctionDecl *&Definition) const {
2663 if (!hasBody(Definition))
2664 return nullptr;
2665
2666 if (Definition->Body)
2667 return Definition->Body.get(getASTContext().getExternalSource());
2668
2669 return nullptr;
2670}
2671
2672void FunctionDecl::setBody(Stmt *B) {
2673 Body = B;
2674 if (B)
2675 EndRangeLoc = B->getLocEnd();
2676}
2677
2678void FunctionDecl::setPure(bool P) {
2679 IsPure = P;
2680 if (P)
2681 if (auto *Parent = dyn_cast<CXXRecordDecl>(getDeclContext()))
2682 Parent->markedVirtualFunctionPure();
2683}
2684
2685template<std::size_t Len>
2686static bool isNamed(const NamedDecl *ND, const char (&Str)[Len]) {
2687 IdentifierInfo *II = ND->getIdentifier();
2688 return II && II->isStr(Str);
2689}
2690
2691bool FunctionDecl::isMain() const {
2692 const TranslationUnitDecl *tunit =
2693 dyn_cast<TranslationUnitDecl>(getDeclContext()->getRedeclContext());
2694 return tunit &&
2695 !tunit->getASTContext().getLangOpts().Freestanding &&
2696 isNamed(this, "main");
2697}
2698
2699bool FunctionDecl::isMSVCRTEntryPoint() const {
2700 const TranslationUnitDecl *TUnit =
2701 dyn_cast<TranslationUnitDecl>(getDeclContext()->getRedeclContext());
2702 if (!TUnit)
2703 return false;
2704
2705 // Even though we aren't really targeting MSVCRT if we are freestanding,
2706 // semantic analysis for these functions remains the same.
2707
2708 // MSVCRT entry points only exist on MSVCRT targets.
2709 if (!TUnit->getASTContext().getTargetInfo().getTriple().isOSMSVCRT())
2710 return false;
2711
2712 // Nameless functions like constructors cannot be entry points.
2713 if (!getIdentifier())
2714 return false;
2715
2716 return llvm::StringSwitch<bool>(getName())
2717 .Cases("main", // an ANSI console app
2718 "wmain", // a Unicode console App
2719 "WinMain", // an ANSI GUI app
2720 "wWinMain", // a Unicode GUI app
2721 "DllMain", // a DLL
2722 true)
2723 .Default(false);
2724}
2725
2726bool FunctionDecl::isReservedGlobalPlacementOperator() const {
2727 assert(getDeclName().getNameKind() == DeclarationName::CXXOperatorName)(static_cast <bool> (getDeclName().getNameKind() == DeclarationName
::CXXOperatorName) ? void (0) : __assert_fail ("getDeclName().getNameKind() == DeclarationName::CXXOperatorName"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 2727, __extension__ __PRETTY_FUNCTION__))
;
2728 assert(getDeclName().getCXXOverloadedOperator() == OO_New ||(static_cast <bool> (getDeclName().getCXXOverloadedOperator
() == OO_New || getDeclName().getCXXOverloadedOperator() == OO_Delete
|| getDeclName().getCXXOverloadedOperator() == OO_Array_New ||
getDeclName().getCXXOverloadedOperator() == OO_Array_Delete)
? 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-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 2731, __extension__ __PRETTY_FUNCTION__))
2729 getDeclName().getCXXOverloadedOperator() == OO_Delete ||(static_cast <bool> (getDeclName().getCXXOverloadedOperator
() == OO_New || getDeclName().getCXXOverloadedOperator() == OO_Delete
|| getDeclName().getCXXOverloadedOperator() == OO_Array_New ||
getDeclName().getCXXOverloadedOperator() == OO_Array_Delete)
? 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-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 2731, __extension__ __PRETTY_FUNCTION__))
2730 getDeclName().getCXXOverloadedOperator() == OO_Array_New ||(static_cast <bool> (getDeclName().getCXXOverloadedOperator
() == OO_New || getDeclName().getCXXOverloadedOperator() == OO_Delete
|| getDeclName().getCXXOverloadedOperator() == OO_Array_New ||
getDeclName().getCXXOverloadedOperator() == OO_Array_Delete)
? 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-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 2731, __extension__ __PRETTY_FUNCTION__))
2731 getDeclName().getCXXOverloadedOperator() == OO_Array_Delete)(static_cast <bool> (getDeclName().getCXXOverloadedOperator
() == OO_New || getDeclName().getCXXOverloadedOperator() == OO_Delete
|| getDeclName().getCXXOverloadedOperator() == OO_Array_New ||
getDeclName().getCXXOverloadedOperator() == OO_Array_Delete)
? 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-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 2731, __extension__ __PRETTY_FUNCTION__))
;
2732
2733 if (!getDeclContext()->getRedeclContext()->isTranslationUnit())
2734 return false;
2735
2736 const auto *proto = getType()->castAs<FunctionProtoType>();
2737 if (proto->getNumParams() != 2 || proto->isVariadic())
2738 return false;
2739
2740 ASTContext &Context =
2741 cast<TranslationUnitDecl>(getDeclContext()->getRedeclContext())
2742 ->getASTContext();
2743
2744 // The result type and first argument type are constant across all
2745 // these operators. The second argument must be exactly void*.
2746 return (proto->getParamType(1).getCanonicalType() == Context.VoidPtrTy);
2747}
2748
2749bool FunctionDecl::isReplaceableGlobalAllocationFunction(bool *IsAligned) const {
2750 if (getDeclName().getNameKind() != DeclarationName::CXXOperatorName)
2751 return false;
2752 if (getDeclName().getCXXOverloadedOperator() != OO_New &&
2753 getDeclName().getCXXOverloadedOperator() != OO_Delete &&
2754 getDeclName().getCXXOverloadedOperator() != OO_Array_New &&
2755 getDeclName().getCXXOverloadedOperator() != OO_Array_Delete)
2756 return false;
2757
2758 if (isa<CXXRecordDecl>(getDeclContext()))
2759 return false;
2760
2761 // This can only fail for an invalid 'operator new' declaration.
2762 if (!getDeclContext()->getRedeclContext()->isTranslationUnit())
2763 return false;
2764
2765 const auto *FPT = getType()->castAs<FunctionProtoType>();
2766 if (FPT->getNumParams() == 0 || FPT->getNumParams() > 3 || FPT->isVariadic())
2767 return false;
2768
2769 // If this is a single-parameter function, it must be a replaceable global
2770 // allocation or deallocation function.
2771 if (FPT->getNumParams() == 1)
2772 return true;
2773
2774 unsigned Params = 1;
2775 QualType Ty = FPT->getParamType(Params);
2776 ASTContext &Ctx = getASTContext();
2777
2778 auto Consume = [&] {
2779 ++Params;
2780 Ty = Params < FPT->getNumParams() ? FPT->getParamType(Params) : QualType();
2781 };
2782
2783 // In C++14, the next parameter can be a 'std::size_t' for sized delete.
2784 bool IsSizedDelete = false;
2785 if (Ctx.getLangOpts().SizedDeallocation &&
2786 (getDeclName().getCXXOverloadedOperator() == OO_Delete ||
2787 getDeclName().getCXXOverloadedOperator() == OO_Array_Delete) &&
2788 Ctx.hasSameType(Ty, Ctx.getSizeType())) {
2789 IsSizedDelete = true;
2790 Consume();
2791 }
2792
2793 // In C++17, the next parameter can be a 'std::align_val_t' for aligned
2794 // new/delete.
2795 if (Ctx.getLangOpts().AlignedAllocation && !Ty.isNull() && Ty->isAlignValT()) {
2796 if (IsAligned)
2797 *IsAligned = true;
2798 Consume();
2799 }
2800
2801 // Finally, if this is not a sized delete, the final parameter can
2802 // be a 'const std::nothrow_t&'.
2803 if (!IsSizedDelete && !Ty.isNull() && Ty->isReferenceType()) {
2804 Ty = Ty->getPointeeType();
2805 if (Ty.getCVRQualifiers() != Qualifiers::Const)
2806 return false;
2807 const CXXRecordDecl *RD = Ty->getAsCXXRecordDecl();
2808 if (RD && isNamed(RD, "nothrow_t") && RD->isInStdNamespace())
2809 Consume();
2810 }
2811
2812 return Params == FPT->getNumParams();
2813}
2814
2815bool FunctionDecl::isDestroyingOperatorDelete() const {
2816 // C++ P0722:
2817 // Within a class C, a single object deallocation function with signature
2818 // (T, std::destroying_delete_t, <more params>)
2819 // is a destroying operator delete.
2820 if (!isa<CXXMethodDecl>(this) || getOverloadedOperator() != OO_Delete ||
2821 getNumParams() < 2)
2822 return false;
2823
2824 auto *RD = getParamDecl(1)->getType()->getAsCXXRecordDecl();
2825 return RD && RD->isInStdNamespace() && RD->getIdentifier() &&
2826 RD->getIdentifier()->isStr("destroying_delete_t");
2827}
2828
2829LanguageLinkage FunctionDecl::getLanguageLinkage() const {
2830 return getDeclLanguageLinkage(*this);
2831}
2832
2833bool FunctionDecl::isExternC() const {
2834 return isDeclExternC(*this);
2835}
2836
2837bool FunctionDecl::isInExternCContext() const {
2838 return getLexicalDeclContext()->isExternCContext();
2839}
2840
2841bool FunctionDecl::isInExternCXXContext() const {
2842 return getLexicalDeclContext()->isExternCXXContext();
2843}
2844
2845bool FunctionDecl::isGlobal() const {
2846 if (const auto *Method = dyn_cast<CXXMethodDecl>(this))
2847 return Method->isStatic();
2848
2849 if (getCanonicalDecl()->getStorageClass() == SC_Static)
2850 return false;
2851
2852 for (const DeclContext *DC = getDeclContext();
2853 DC->isNamespace();
2854 DC = DC->getParent()) {
2855 if (const auto *Namespace = cast<NamespaceDecl>(DC)) {
2856 if (!Namespace->getDeclName())
2857 return false;
2858 break;
2859 }
2860 }
2861
2862 return true;
2863}
2864
2865bool FunctionDecl::isNoReturn() const {
2866 if (hasAttr<NoReturnAttr>() || hasAttr<CXX11NoReturnAttr>() ||
2867 hasAttr<C11NoReturnAttr>())
2868 return true;
2869
2870 if (auto *FnTy = getType()->getAs<FunctionType>())
2871 return FnTy->getNoReturnAttr();
2872
2873 return false;
2874}
2875
2876bool FunctionDecl::isCPUDispatchMultiVersion() const {
2877 return isMultiVersion() && hasAttr<CPUDispatchAttr>();
2878}
2879
2880bool FunctionDecl::isCPUSpecificMultiVersion() const {
2881 return isMultiVersion() && hasAttr<CPUSpecificAttr>();
2882}
2883
2884void
2885FunctionDecl::setPreviousDeclaration(FunctionDecl *PrevDecl) {
2886 redeclarable_base::setPreviousDecl(PrevDecl);
2887
2888 if (FunctionTemplateDecl *FunTmpl = getDescribedFunctionTemplate()) {
2889 FunctionTemplateDecl *PrevFunTmpl
2890 = PrevDecl? PrevDecl->getDescribedFunctionTemplate() : nullptr;
2891 assert((!PrevDecl || PrevFunTmpl) && "Function/function template mismatch")(static_cast <bool> ((!PrevDecl || PrevFunTmpl) &&
"Function/function template mismatch") ? void (0) : __assert_fail
("(!PrevDecl || PrevFunTmpl) && \"Function/function template mismatch\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 2891, __extension__ __PRETTY_FUNCTION__))
;
2892 FunTmpl->setPreviousDecl(PrevFunTmpl);
2893 }
2894
2895 if (PrevDecl && PrevDecl->IsInline)
2896 IsInline = true;
2897}
2898
2899FunctionDecl *FunctionDecl::getCanonicalDecl() { return getFirstDecl(); }
2900
2901/// Returns a value indicating whether this function
2902/// corresponds to a builtin function.
2903///
2904/// The function corresponds to a built-in function if it is
2905/// declared at translation scope or within an extern "C" block and
2906/// its name matches with the name of a builtin. The returned value
2907/// will be 0 for functions that do not correspond to a builtin, a
2908/// value of type \c Builtin::ID if in the target-independent range
2909/// \c [1,Builtin::First), or a target-specific builtin value.
2910unsigned FunctionDecl::getBuiltinID() const {
2911 if (!getIdentifier())
2912 return 0;
2913
2914 unsigned BuiltinID = getIdentifier()->getBuiltinID();
2915 if (!BuiltinID)
2916 return 0;
2917
2918 ASTContext &Context = getASTContext();
2919 if (Context.getLangOpts().CPlusPlus) {
2920 const auto *LinkageDecl =
2921 dyn_cast<LinkageSpecDecl>(getFirstDecl()->getDeclContext());
2922 // In C++, the first declaration of a builtin is always inside an implicit
2923 // extern "C".
2924 // FIXME: A recognised library function may not be directly in an extern "C"
2925 // declaration, for instance "extern "C" { namespace std { decl } }".
2926 if (!LinkageDecl) {
2927 if (BuiltinID == Builtin::BI__GetExceptionInfo &&
2928 Context.getTargetInfo().getCXXABI().isMicrosoft())
2929 return Builtin::BI__GetExceptionInfo;
2930 return 0;
2931 }
2932 if (LinkageDecl->getLanguage() != LinkageSpecDecl::lang_c)
2933 return 0;
2934 }
2935
2936 // If the function is marked "overloadable", it has a different mangled name
2937 // and is not the C library function.
2938 if (hasAttr<OverloadableAttr>())
2939 return 0;
2940
2941 if (!Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID))
2942 return BuiltinID;
2943
2944 // This function has the name of a known C library
2945 // function. Determine whether it actually refers to the C library
2946 // function or whether it just has the same name.
2947
2948 // If this is a static function, it's not a builtin.
2949 if (getStorageClass() == SC_Static)
2950 return 0;
2951
2952 // OpenCL v1.2 s6.9.f - The library functions defined in
2953 // the C99 standard headers are not available.
2954 if (Context.getLangOpts().OpenCL &&
2955 Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID))
2956 return 0;
2957
2958 // CUDA does not have device-side standard library. printf and malloc are the
2959 // only special cases that are supported by device-side runtime.
2960 if (Context.getLangOpts().CUDA && hasAttr<CUDADeviceAttr>() &&
2961 !hasAttr<CUDAHostAttr>() &&
2962 !(BuiltinID == Builtin::BIprintf || BuiltinID == Builtin::BImalloc))
2963 return 0;
2964
2965 return BuiltinID;
2966}
2967
2968/// getNumParams - Return the number of parameters this function must have
2969/// based on its FunctionType. This is the length of the ParamInfo array
2970/// after it has been created.
2971unsigned FunctionDecl::getNumParams() const {
2972 const auto *FPT = getType()->getAs<FunctionProtoType>();
2973 return FPT ? FPT->getNumParams() : 0;
2974}
2975
2976void FunctionDecl::setParams(ASTContext &C,
2977 ArrayRef<ParmVarDecl *> NewParamInfo) {
2978 assert(!ParamInfo && "Already has param info!")(static_cast <bool> (!ParamInfo && "Already has param info!"
) ? void (0) : __assert_fail ("!ParamInfo && \"Already has param info!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 2978, __extension__ __PRETTY_FUNCTION__))
;
2979 assert(NewParamInfo.size() == getNumParams() && "Parameter count mismatch!")(static_cast <bool> (NewParamInfo.size() == getNumParams
() && "Parameter count mismatch!") ? void (0) : __assert_fail
("NewParamInfo.size() == getNumParams() && \"Parameter count mismatch!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 2979, __extension__ __PRETTY_FUNCTION__))
;
2980
2981 // Zero params -> null pointer.
2982 if (!NewParamInfo.empty()) {
2983 ParamInfo = new (C) ParmVarDecl*[NewParamInfo.size()];
2984 std::copy(NewParamInfo.begin(), NewParamInfo.end(), ParamInfo);
2985 }
2986}
2987
2988/// getMinRequiredArguments - Returns the minimum number of arguments
2989/// needed to call this function. This may be fewer than the number of
2990/// function parameters, if some of the parameters have default
2991/// arguments (in C++) or are parameter packs (C++11).
2992unsigned FunctionDecl::getMinRequiredArguments() const {
2993 if (!getASTContext().getLangOpts().CPlusPlus)
2994 return getNumParams();
2995
2996 unsigned NumRequiredArgs = 0;
2997 for (auto *Param : parameters())
2998 if (!Param->isParameterPack() && !Param->hasDefaultArg())
2999 ++NumRequiredArgs;
3000 return NumRequiredArgs;
3001}
3002
3003/// The combination of the extern and inline keywords under MSVC forces
3004/// the function to be required.
3005///
3006/// Note: This function assumes that we will only get called when isInlined()
3007/// would return true for this FunctionDecl.
3008bool FunctionDecl::isMSExternInline() const {
3009 assert(isInlined() && "expected to get called on an inlined function!")(static_cast <bool> (isInlined() && "expected to get called on an inlined function!"
) ? void (0) : __assert_fail ("isInlined() && \"expected to get called on an inlined function!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 3009, __extension__ __PRETTY_FUNCTION__))
;
3010
3011 const ASTContext &Context = getASTContext();
3012 if (!Context.getTargetInfo().getCXXABI().isMicrosoft() &&
3013 !hasAttr<DLLExportAttr>())
3014 return false;
3015
3016 for (const FunctionDecl *FD = getMostRecentDecl(); FD;
3017 FD = FD->getPreviousDecl())
3018 if (!FD->isImplicit() && FD->getStorageClass() == SC_Extern)
3019 return true;
3020
3021 return false;
3022}
3023
3024static bool redeclForcesDefMSVC(const FunctionDecl *Redecl) {
3025 if (Redecl->getStorageClass() != SC_Extern)
3026 return false;
3027
3028 for (const FunctionDecl *FD = Redecl->getPreviousDecl(); FD;
3029 FD = FD->getPreviousDecl())
3030 if (!FD->isImplicit() && FD->getStorageClass() == SC_Extern)
3031 return false;
3032
3033 return true;
3034}
3035
3036static bool RedeclForcesDefC99(const FunctionDecl *Redecl) {
3037 // Only consider file-scope declarations in this test.
3038 if (!Redecl->getLexicalDeclContext()->isTranslationUnit())
3039 return false;
3040
3041 // Only consider explicit declarations; the presence of a builtin for a
3042 // libcall shouldn't affect whether a definition is externally visible.
3043 if (Redecl->isImplicit())
3044 return false;
3045
3046 if (!Redecl->isInlineSpecified() || Redecl->getStorageClass() == SC_Extern)
3047 return true; // Not an inline definition
3048
3049 return false;
3050}
3051
3052/// For a function declaration in C or C++, determine whether this
3053/// declaration causes the definition to be externally visible.
3054///
3055/// For instance, this determines if adding the current declaration to the set
3056/// of redeclarations of the given functions causes
3057/// isInlineDefinitionExternallyVisible to change from false to true.
3058bool FunctionDecl::doesDeclarationForceExternallyVisibleDefinition() const {
3059 assert(!doesThisDeclarationHaveABody() &&(static_cast <bool> (!doesThisDeclarationHaveABody() &&
"Must have a declaration without a body.") ? void (0) : __assert_fail
("!doesThisDeclarationHaveABody() && \"Must have a declaration without a body.\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 3060, __extension__ __PRETTY_FUNCTION__))
3060 "Must have a declaration without a body.")(static_cast <bool> (!doesThisDeclarationHaveABody() &&
"Must have a declaration without a body.") ? void (0) : __assert_fail
("!doesThisDeclarationHaveABody() && \"Must have a declaration without a body.\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 3060, __extension__ __PRETTY_FUNCTION__))
;
3061
3062 ASTContext &Context = getASTContext();
3063
3064 if (Context.getLangOpts().MSVCCompat) {
3065 const FunctionDecl *Definition;
3066 if (hasBody(Definition) && Definition->isInlined() &&
3067 redeclForcesDefMSVC(this))
3068 return true;
3069 }
3070
3071 if (Context.getLangOpts().GNUInline || hasAttr<GNUInlineAttr>()) {
3072 // With GNU inlining, a declaration with 'inline' but not 'extern', forces
3073 // an externally visible definition.
3074 //
3075 // FIXME: What happens if gnu_inline gets added on after the first
3076 // declaration?
3077 if (!isInlineSpecified() || getStorageClass() == SC_Extern)
3078 return false;
3079
3080 const FunctionDecl *Prev = this;
3081 bool FoundBody = false;
3082 while ((Prev = Prev->getPreviousDecl())) {
3083 FoundBody |= Prev->Body.isValid();
3084
3085 if (Prev->Body) {
3086 // If it's not the case that both 'inline' and 'extern' are
3087 // specified on the definition, then it is always externally visible.
3088 if (!Prev->isInlineSpecified() ||
3089 Prev->getStorageClass() != SC_Extern)
3090 return false;
3091 } else if (Prev->isInlineSpecified() &&
3092 Prev->getStorageClass() != SC_Extern) {
3093 return false;
3094 }
3095 }
3096 return FoundBody;
3097 }
3098
3099 if (Context.getLangOpts().CPlusPlus)
3100 return false;
3101
3102 // C99 6.7.4p6:
3103 // [...] If all of the file scope declarations for a function in a
3104 // translation unit include the inline function specifier without extern,
3105 // then the definition in that translation unit is an inline definition.
3106 if (isInlineSpecified() && getStorageClass() != SC_Extern)
3107 return false;
3108 const FunctionDecl *Prev = this;
3109 bool FoundBody = false;
3110 while ((Prev = Prev->getPreviousDecl())) {
3111 FoundBody |= Prev->Body.isValid();
3112 if (RedeclForcesDefC99(Prev))
3113 return false;
3114 }
3115 return FoundBody;
3116}
3117
3118SourceRange FunctionDecl::getReturnTypeSourceRange() const {
3119 const TypeSourceInfo *TSI = getTypeSourceInfo();
3120 if (!TSI)
3121 return SourceRange();
3122 FunctionTypeLoc FTL =
3123 TSI->getTypeLoc().IgnoreParens().getAs<FunctionTypeLoc>();
3124 if (!FTL)
3125 return SourceRange();
3126
3127 // Skip self-referential return types.
3128 const SourceManager &SM = getASTContext().getSourceManager();
3129 SourceRange RTRange = FTL.getReturnLoc().getSourceRange();
3130 SourceLocation Boundary = getNameInfo().getLocStart();
3131 if (RTRange.isInvalid() || Boundary.isInvalid() ||
3132 !SM.isBeforeInTranslationUnit(RTRange.getEnd(), Boundary))
3133 return SourceRange();
3134
3135 return RTRange;
3136}
3137
3138SourceRange FunctionDecl::getExceptionSpecSourceRange() const {
3139 const TypeSourceInfo *TSI = getTypeSourceInfo();
3140 if (!TSI)
3141 return SourceRange();
3142 FunctionTypeLoc FTL =
3143 TSI->getTypeLoc().IgnoreParens().getAs<FunctionTypeLoc>();
3144 if (!FTL)
3145 return SourceRange();
3146
3147 return FTL.getExceptionSpecRange();
3148}
3149
3150const Attr *FunctionDecl::getUnusedResultAttr() const {
3151 QualType RetType = getReturnType();
3152 if (const auto *Ret = RetType->getAsRecordDecl()) {
3153 if (const auto *R = Ret->getAttr<WarnUnusedResultAttr>())
3154 return R;
3155 } else if (const auto *ET = RetType->getAs<EnumType>()) {
3156 if (const EnumDecl *ED = ET->getDecl()) {
3157 if (const auto *R = ED->getAttr<WarnUnusedResultAttr>())
3158 return R;
3159 }
3160 }
3161 return getAttr<WarnUnusedResultAttr>();
3162}
3163
3164/// For an inline function definition in C, or for a gnu_inline function
3165/// in C++, determine whether the definition will be externally visible.
3166///
3167/// Inline function definitions are always available for inlining optimizations.
3168/// However, depending on the language dialect, declaration specifiers, and
3169/// attributes, the definition of an inline function may or may not be
3170/// "externally" visible to other translation units in the program.
3171///
3172/// In C99, inline definitions are not externally visible by default. However,
3173/// if even one of the global-scope declarations is marked "extern inline", the
3174/// inline definition becomes externally visible (C99 6.7.4p6).
3175///
3176/// In GNU89 mode, or if the gnu_inline attribute is attached to the function
3177/// definition, we use the GNU semantics for inline, which are nearly the
3178/// opposite of C99 semantics. In particular, "inline" by itself will create
3179/// an externally visible symbol, but "extern inline" will not create an
3180/// externally visible symbol.
3181bool FunctionDecl::isInlineDefinitionExternallyVisible() const {
3182 assert((doesThisDeclarationHaveABody() || willHaveBody()) &&(static_cast <bool> ((doesThisDeclarationHaveABody() ||
willHaveBody()) && "Must be a function definition") ?
void (0) : __assert_fail ("(doesThisDeclarationHaveABody() || willHaveBody()) && \"Must be a function definition\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 3183, __extension__ __PRETTY_FUNCTION__))
3183 "Must be a function definition")(static_cast <bool> ((doesThisDeclarationHaveABody() ||
willHaveBody()) && "Must be a function definition") ?
void (0) : __assert_fail ("(doesThisDeclarationHaveABody() || willHaveBody()) && \"Must be a function definition\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 3183, __extension__ __PRETTY_FUNCTION__))
;
3184 assert(isInlined() && "Function must be inline")(static_cast <bool> (isInlined() && "Function must be inline"
) ? void (0) : __assert_fail ("isInlined() && \"Function must be inline\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 3184, __extension__ __PRETTY_FUNCTION__))
;
3185 ASTContext &Context = getASTContext();
3186
3187 if (Context.getLangOpts().GNUInline || hasAttr<GNUInlineAttr>()) {
3188 // Note: If you change the logic here, please change
3189 // doesDeclarationForceExternallyVisibleDefinition as well.
3190 //
3191 // If it's not the case that both 'inline' and 'extern' are
3192 // specified on the definition, then this inline definition is
3193 // externally visible.
3194 if (!(isInlineSpecified() && getStorageClass() == SC_Extern))
3195 return true;
3196
3197 // If any declaration is 'inline' but not 'extern', then this definition
3198 // is externally visible.
3199 for (auto Redecl : redecls()) {
3200 if (Redecl->isInlineSpecified() &&
3201 Redecl->getStorageClass() != SC_Extern)
3202 return true;
3203 }
3204
3205 return false;
3206 }
3207
3208 // The rest of this function is C-only.
3209 assert(!Context.getLangOpts().CPlusPlus &&(static_cast <bool> (!Context.getLangOpts().CPlusPlus &&
"should not use C inline rules in C++") ? void (0) : __assert_fail
("!Context.getLangOpts().CPlusPlus && \"should not use C inline rules in C++\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 3210, __extension__ __PRETTY_FUNCTION__))
3210 "should not use C inline rules in C++")(static_cast <bool> (!Context.getLangOpts().CPlusPlus &&
"should not use C inline rules in C++") ? void (0) : __assert_fail
("!Context.getLangOpts().CPlusPlus && \"should not use C inline rules in C++\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 3210, __extension__ __PRETTY_FUNCTION__))
;
3211
3212 // C99 6.7.4p6:
3213 // [...] If all of the file scope declarations for a function in a
3214 // translation unit include the inline function specifier without extern,
3215 // then the definition in that translation unit is an inline definition.
3216 for (auto Redecl : redecls()) {
3217 if (RedeclForcesDefC99(Redecl))
3218 return true;
3219 }
3220
3221 // C99 6.7.4p6:
3222 // An inline definition does not provide an external definition for the
3223 // function, and does not forbid an external definition in another
3224 // translation unit.
3225 return false;
3226}
3227
3228/// getOverloadedOperator - Which C++ overloaded operator this
3229/// function represents, if any.
3230OverloadedOperatorKind FunctionDecl::getOverloadedOperator() const {
3231 if (getDeclName().getNameKind() == DeclarationName::CXXOperatorName)
3232 return getDeclName().getCXXOverloadedOperator();
3233 else
3234 return OO_None;
3235}
3236
3237/// getLiteralIdentifier - The literal suffix identifier this function
3238/// represents, if any.
3239const IdentifierInfo *FunctionDecl::getLiteralIdentifier() const {
3240 if (getDeclName().getNameKind() == DeclarationName::CXXLiteralOperatorName)
3241 return getDeclName().getCXXLiteralIdentifier();
3242 else
3243 return nullptr;
3244}
3245
3246FunctionDecl::TemplatedKind FunctionDecl::getTemplatedKind() const {
3247 if (TemplateOrSpecialization.isNull())
3248 return TK_NonTemplate;
3249 if (TemplateOrSpecialization.is<FunctionTemplateDecl *>())
3250 return TK_FunctionTemplate;
3251 if (TemplateOrSpecialization.is<MemberSpecializationInfo *>())
3252 return TK_MemberSpecialization;
3253 if (TemplateOrSpecialization.is<FunctionTemplateSpecializationInfo *>())
3254 return TK_FunctionTemplateSpecialization;
3255 if (TemplateOrSpecialization.is
3256 <DependentFunctionTemplateSpecializationInfo*>())
3257 return TK_DependentFunctionTemplateSpecialization;
3258
3259 llvm_unreachable("Did we miss a TemplateOrSpecialization type?")::llvm::llvm_unreachable_internal("Did we miss a TemplateOrSpecialization type?"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 3259)
;
3260}
3261
3262FunctionDecl *FunctionDecl::getInstantiatedFromMemberFunction() const {
3263 if (MemberSpecializationInfo *Info = getMemberSpecializationInfo())
3264 return cast<FunctionDecl>(Info->getInstantiatedFrom());
3265
3266 return nullptr;
3267}
3268
3269MemberSpecializationInfo *FunctionDecl::getMemberSpecializationInfo() const {
3270 return TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo *>();
3271}
3272
3273void
3274FunctionDecl::setInstantiationOfMemberFunction(ASTContext &C,
3275 FunctionDecl *FD,
3276 TemplateSpecializationKind TSK) {
3277 assert(TemplateOrSpecialization.isNull() &&(static_cast <bool> (TemplateOrSpecialization.isNull() &&
"Member function is already a specialization") ? void (0) : __assert_fail
("TemplateOrSpecialization.isNull() && \"Member function is already a specialization\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 3278, __extension__ __PRETTY_FUNCTION__))
3278 "Member function is already a specialization")(static_cast <bool> (TemplateOrSpecialization.isNull() &&
"Member function is already a specialization") ? void (0) : __assert_fail
("TemplateOrSpecialization.isNull() && \"Member function is already a specialization\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 3278, __extension__ __PRETTY_FUNCTION__))
;
3279 MemberSpecializationInfo *Info
3280 = new (C) MemberSpecializationInfo(FD, TSK);
3281 TemplateOrSpecialization = Info;
3282}
3283
3284FunctionTemplateDecl *FunctionDecl::getDescribedFunctionTemplate() const {
3285 return TemplateOrSpecialization.dyn_cast<FunctionTemplateDecl *>();
3286}
3287
3288void FunctionDecl::setDescribedFunctionTemplate(FunctionTemplateDecl *Template) {
3289 TemplateOrSpecialization = Template;
3290}
3291
3292bool FunctionDecl::isImplicitlyInstantiable() const {
3293 // If the function is invalid, it can't be implicitly instantiated.
3294 if (isInvalidDecl())
3295 return false;
3296
3297 switch (getTemplateSpecializationKind()) {
3298 case TSK_Undeclared:
3299 case TSK_ExplicitInstantiationDefinition:
3300 return false;
3301
3302 case TSK_ImplicitInstantiation:
3303 return true;
3304
3305 // It is possible to instantiate TSK_ExplicitSpecialization kind
3306 // if the FunctionDecl has a class scope specialization pattern.
3307 case TSK_ExplicitSpecialization:
3308 return getClassScopeSpecializationPattern() != nullptr;
3309
3310 case TSK_ExplicitInstantiationDeclaration:
3311 // Handled below.
3312 break;
3313 }
3314
3315 // Find the actual template from which we will instantiate.
3316 const FunctionDecl *PatternDecl = getTemplateInstantiationPattern();
3317 bool HasPattern = false;
3318 if (PatternDecl)
3319 HasPattern = PatternDecl->hasBody(PatternDecl);
3320
3321 // C++0x [temp.explicit]p9:
3322 // Except for inline functions, other explicit instantiation declarations
3323 // have the effect of suppressing the implicit instantiation of the entity
3324 // to which they refer.
3325 if (!HasPattern || !PatternDecl)
3326 return true;
3327
3328 return PatternDecl->isInlined();
3329}
3330
3331bool FunctionDecl::isTemplateInstantiation() const {
3332 switch (getTemplateSpecializationKind()) {
3333 case TSK_Undeclared:
3334 case TSK_ExplicitSpecialization:
3335 return false;
3336 case TSK_ImplicitInstantiation:
3337 case TSK_ExplicitInstantiationDeclaration:
3338 case TSK_ExplicitInstantiationDefinition:
3339 return true;
3340 }
3341 llvm_unreachable("All TSK values handled.")::llvm::llvm_unreachable_internal("All TSK values handled.", "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 3341)
;
3342}
3343
3344FunctionDecl *FunctionDecl::getTemplateInstantiationPattern() const {
3345 // Handle class scope explicit specialization special case.
3346 if (getTemplateSpecializationKind() == TSK_ExplicitSpecialization) {
3347 if (auto *Spec = getClassScopeSpecializationPattern())
3348 return getDefinitionOrSelf(Spec);
3349 return nullptr;
3350 }
3351
3352 // If this is a generic lambda call operator specialization, its
3353 // instantiation pattern is always its primary template's pattern
3354 // even if its primary template was instantiated from another
3355 // member template (which happens with nested generic lambdas).
3356 // Since a lambda's call operator's body is transformed eagerly,
3357 // we don't have to go hunting for a prototype definition template
3358 // (i.e. instantiated-from-member-template) to use as an instantiation
3359 // pattern.
3360
3361 if (isGenericLambdaCallOperatorSpecialization(
3362 dyn_cast<CXXMethodDecl>(this))) {
3363 assert(getPrimaryTemplate() && "not a generic lambda call operator?")(static_cast <bool> (getPrimaryTemplate() && "not a generic lambda call operator?"
) ? void (0) : __assert_fail ("getPrimaryTemplate() && \"not a generic lambda call operator?\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 3363, __extension__ __PRETTY_FUNCTION__))
;
3364 return getDefinitionOrSelf(getPrimaryTemplate()->getTemplatedDecl());
3365 }
3366
3367 if (FunctionTemplateDecl *Primary = getPrimaryTemplate()) {
3368 while (Primary->getInstantiatedFromMemberTemplate()) {
3369 // If we have hit a point where the user provided a specialization of
3370 // this template, we're done looking.
3371 if (Primary->isMemberSpecialization())
3372 break;
3373 Primary = Primary->getInstantiatedFromMemberTemplate();
3374 }
3375
3376 return getDefinitionOrSelf(Primary->getTemplatedDecl());
3377 }
3378
3379 if (auto *MFD = getInstantiatedFromMemberFunction())
3380 return getDefinitionOrSelf(MFD);
3381
3382 return nullptr;
3383}
3384
3385FunctionTemplateDecl *FunctionDecl::getPrimaryTemplate() const {
3386 if (FunctionTemplateSpecializationInfo *Info
3387 = TemplateOrSpecialization
3388 .dyn_cast<FunctionTemplateSpecializationInfo*>()) {
3389 return Info->Template.getPointer();
3390 }
3391 return nullptr;
3392}
3393
3394FunctionDecl *FunctionDecl::getClassScopeSpecializationPattern() const {
3395 return getASTContext().getClassScopeSpecializationPattern(this);
3396}
3397
3398FunctionTemplateSpecializationInfo *
3399FunctionDecl::getTemplateSpecializationInfo() const {
3400 return TemplateOrSpecialization
3401 .dyn_cast<FunctionTemplateSpecializationInfo *>();
3402}
3403
3404const TemplateArgumentList *
3405FunctionDecl::getTemplateSpecializationArgs() const {
3406 if (FunctionTemplateSpecializationInfo *Info
3407 = TemplateOrSpecialization
3408 .dyn_cast<FunctionTemplateSpecializationInfo*>()) {
3409 return Info->TemplateArguments;
3410 }
3411 return nullptr;
3412}
3413
3414const ASTTemplateArgumentListInfo *
3415FunctionDecl::getTemplateSpecializationArgsAsWritten() const {
3416 if (FunctionTemplateSpecializationInfo *Info
3417 = TemplateOrSpecialization
3418 .dyn_cast<FunctionTemplateSpecializationInfo*>()) {
3419 return Info->TemplateArgumentsAsWritten;
3420 }
3421 return nullptr;
3422}
3423
3424void
3425FunctionDecl::setFunctionTemplateSpecialization(ASTContext &C,
3426 FunctionTemplateDecl *Template,
3427 const TemplateArgumentList *TemplateArgs,
3428 void *InsertPos,
3429 TemplateSpecializationKind TSK,
3430 const TemplateArgumentListInfo *TemplateArgsAsWritten,
3431 SourceLocation PointOfInstantiation) {
3432 assert(TSK != TSK_Undeclared &&(static_cast <bool> (TSK != TSK_Undeclared && "Must specify the type of function template specialization"
) ? void (0) : __assert_fail ("TSK != TSK_Undeclared && \"Must specify the type of function template specialization\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 3433, __extension__ __PRETTY_FUNCTION__))
3433 "Must specify the type of function template specialization")(static_cast <bool> (TSK != TSK_Undeclared && "Must specify the type of function template specialization"
) ? void (0) : __assert_fail ("TSK != TSK_Undeclared && \"Must specify the type of function template specialization\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 3433, __extension__ __PRETTY_FUNCTION__))
;
3434 FunctionTemplateSpecializationInfo *Info
3435 = TemplateOrSpecialization.dyn_cast<FunctionTemplateSpecializationInfo*>();
3436 if (!Info)
3437 Info = FunctionTemplateSpecializationInfo::Create(C, this, Template, TSK,
3438 TemplateArgs,
3439 TemplateArgsAsWritten,
3440 PointOfInstantiation);
3441 TemplateOrSpecialization = Info;
3442 Template->addSpecialization(Info, InsertPos);
3443}
3444
3445void
3446FunctionDecl::setDependentTemplateSpecialization(ASTContext &Context,
3447 const UnresolvedSetImpl &Templates,
3448 const TemplateArgumentListInfo &TemplateArgs) {
3449 assert(TemplateOrSpecialization.isNull())(static_cast <bool> (TemplateOrSpecialization.isNull())
? void (0) : __assert_fail ("TemplateOrSpecialization.isNull()"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 3449, __extension__ __PRETTY_FUNCTION__))
;
3450 DependentFunctionTemplateSpecializationInfo *Info =
3451 DependentFunctionTemplateSpecializationInfo::Create(Context, Templates,
3452 TemplateArgs);
3453 TemplateOrSpecialization = Info;
3454}
3455
3456DependentFunctionTemplateSpecializationInfo *
3457FunctionDecl::getDependentSpecializationInfo() const {
3458 return TemplateOrSpecialization
3459 .dyn_cast<DependentFunctionTemplateSpecializationInfo *>();
3460}
3461
3462DependentFunctionTemplateSpecializationInfo *
3463DependentFunctionTemplateSpecializationInfo::Create(
3464 ASTContext &Context, const UnresolvedSetImpl &Ts,
3465 const TemplateArgumentListInfo &TArgs) {
3466 void *Buffer = Context.Allocate(
3467 totalSizeToAlloc<TemplateArgumentLoc, FunctionTemplateDecl *>(
3468 TArgs.size(), Ts.size()));
3469 return new (Buffer) DependentFunctionTemplateSpecializationInfo(Ts, TArgs);
3470}
3471
3472DependentFunctionTemplateSpecializationInfo::
3473DependentFunctionTemplateSpecializationInfo(const UnresolvedSetImpl &Ts,
3474 const TemplateArgumentListInfo &TArgs)
3475 : AngleLocs(TArgs.getLAngleLoc(), TArgs.getRAngleLoc()) {
3476 NumTemplates = Ts.size();
3477 NumArgs = TArgs.size();
3478
3479 FunctionTemplateDecl **TsArray = getTrailingObjects<FunctionTemplateDecl *>();
3480 for (unsigned I = 0, E = Ts.size(); I != E; ++I)
3481 TsArray[I] = cast<FunctionTemplateDecl>(Ts[I]->getUnderlyingDecl());
3482
3483 TemplateArgumentLoc *ArgsArray = getTrailingObjects<TemplateArgumentLoc>();
3484 for (unsigned I = 0, E = TArgs.size(); I != E; ++I)
3485 new (&ArgsArray[I]) TemplateArgumentLoc(TArgs[I]);
3486}
3487
3488TemplateSpecializationKind FunctionDecl::getTemplateSpecializationKind() const {
3489 // For a function template specialization, query the specialization
3490 // information object.
3491 FunctionTemplateSpecializationInfo *FTSInfo
3492 = TemplateOrSpecialization.dyn_cast<FunctionTemplateSpecializationInfo*>();
3493 if (FTSInfo)
3494 return FTSInfo->getTemplateSpecializationKind();
3495
3496 MemberSpecializationInfo *MSInfo
3497 = TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo*>();
3498 if (MSInfo)
3499 return MSInfo->getTemplateSpecializationKind();
3500
3501 return TSK_Undeclared;
3502}
3503
3504void
3505FunctionDecl::setTemplateSpecializationKind(TemplateSpecializationKind TSK,
3506 SourceLocation PointOfInstantiation) {
3507 if (FunctionTemplateSpecializationInfo *FTSInfo
3508 = TemplateOrSpecialization.dyn_cast<
3509 FunctionTemplateSpecializationInfo*>()) {
3510 FTSInfo->setTemplateSpecializationKind(TSK);
3511 if (TSK != TSK_ExplicitSpecialization &&
3512 PointOfInstantiation.isValid() &&
3513 FTSInfo->getPointOfInstantiation().isInvalid()) {
3514 FTSInfo->setPointOfInstantiation(PointOfInstantiation);
3515 if (ASTMutationListener *L = getASTContext().getASTMutationListener())
3516 L->InstantiationRequested(this);
3517 }
3518 } else if (MemberSpecializationInfo *MSInfo
3519 = TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo*>()) {
3520 MSInfo->setTemplateSpecializationKind(TSK);
3521 if (TSK != TSK_ExplicitSpecialization &&
3522 PointOfInstantiation.isValid() &&
3523 MSInfo->getPointOfInstantiation().isInvalid()) {
3524 MSInfo->setPointOfInstantiation(PointOfInstantiation);
3525 if (ASTMutationListener *L = getASTContext().getASTMutationListener())
3526 L->InstantiationRequested(this);
3527 }
3528 } else
3529 llvm_unreachable("Function cannot have a template specialization kind")::llvm::llvm_unreachable_internal("Function cannot have a template specialization kind"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 3529)
;
3530}
3531
3532SourceLocation FunctionDecl::getPointOfInstantiation() const {
3533 if (FunctionTemplateSpecializationInfo *FTSInfo
3534 = TemplateOrSpecialization.dyn_cast<
3535 FunctionTemplateSpecializationInfo*>())
3536 return FTSInfo->getPointOfInstantiation();
3537 else if (MemberSpecializationInfo *MSInfo
3538 = TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo*>())
3539 return MSInfo->getPointOfInstantiation();
3540
3541 return SourceLocation();
3542}
3543
3544bool FunctionDecl::isOutOfLine() const {
3545 if (Decl::isOutOfLine())
3546 return true;
3547
3548 // If this function was instantiated from a member function of a
3549 // class template, check whether that member function was defined out-of-line.
3550 if (FunctionDecl *FD = getInstantiatedFromMemberFunction()) {
3551 const FunctionDecl *Definition;
3552 if (FD->hasBody(Definition))
3553 return Definition->isOutOfLine();
3554 }
3555
3556 // If this function was instantiated from a function template,
3557 // check whether that function template was defined out-of-line.
3558 if (FunctionTemplateDecl *FunTmpl = getPrimaryTemplate()) {
3559 const FunctionDecl *Definition;
3560 if (FunTmpl->getTemplatedDecl()->hasBody(Definition))
3561 return Definition->isOutOfLine();
3562 }
3563
3564 return false;
3565}
3566
3567SourceRange FunctionDecl::getSourceRange() const {
3568 return SourceRange(getOuterLocStart(), EndRangeLoc);
3569}
3570
3571unsigned FunctionDecl::getMemoryFunctionKind() const {
3572 IdentifierInfo *FnInfo = getIdentifier();
3573
3574 if (!FnInfo)
3575 return 0;
3576
3577 // Builtin handling.
3578 switch (getBuiltinID()) {
3579 case Builtin::BI__builtin_memset:
3580 case Builtin::BI__builtin___memset_chk:
3581 case Builtin::BImemset:
3582 return Builtin::BImemset;
3583
3584 case Builtin::BI__builtin_memcpy:
3585 case Builtin::BI__builtin___memcpy_chk:
3586 case Builtin::BImemcpy:
3587 return Builtin::BImemcpy;
3588
3589 case Builtin::BI__builtin_memmove:
3590 case Builtin::BI__builtin___memmove_chk:
3591 case Builtin::BImemmove:
3592 return Builtin::BImemmove;
3593
3594// case Builtin::BIstrlcpy:
3595// case Builtin::BI__builtin___strlcpy_chk:
3596// return Builtin::BIstrlcpy;
3597
3598// case Builtin::BIstrlcat:
3599// case Builtin::BI__builtin___strlcat_chk:
3600// return Builtin::BIstrlcat;
3601
3602 case Builtin::BI__builtin_memcmp:
3603 case Builtin::BImemcmp:
3604 return Builtin::BImemcmp;
3605
3606 case Builtin::BI__builtin_strncpy:
3607 case Builtin::BI__builtin___strncpy_chk:
3608 case Builtin::BIstrncpy:
3609 return Builtin::BIstrncpy;
3610
3611 case Builtin::BI__builtin_strncmp:
3612 case Builtin::BIstrncmp:
3613 return Builtin::BIstrncmp;
3614
3615 case Builtin::BI__builtin_strncasecmp:
3616 case Builtin::BIstrncasecmp:
3617 return Builtin::BIstrncasecmp;
3618
3619 case Builtin::BI__builtin_strncat:
3620 case Builtin::BI__builtin___strncat_chk:
3621 case Builtin::BIstrncat:
3622 return Builtin::BIstrncat;
3623
3624 case Builtin::BI__builtin_strndup:
3625 case Builtin::BIstrndup:
3626 return Builtin::BIstrndup;
3627
3628 case Builtin::BI__builtin_strlen:
3629 case Builtin::BIstrlen:
3630 return Builtin::BIstrlen;
3631
3632 case Builtin::BI__builtin_bzero:
3633 case Builtin::BIbzero:
3634 return Builtin::BIbzero;
3635
3636 default:
3637 if (isExternC()) {
3638 if (FnInfo->isStr("memset"))
3639 return Builtin::BImemset;
3640 else if (FnInfo->isStr("memcpy"))
3641 return Builtin::BImemcpy;
3642 else if (FnInfo->isStr("memmove"))
3643 return Builtin::BImemmove;
3644 else if (FnInfo->isStr("memcmp"))
3645 return Builtin::BImemcmp;
3646 else if (FnInfo->isStr("strncpy"))
3647 return Builtin::BIstrncpy;
3648 else if (FnInfo->isStr("strncmp"))
3649 return Builtin::BIstrncmp;
3650 else if (FnInfo->isStr("strncasecmp"))
3651 return Builtin::BIstrncasecmp;
3652 else if (FnInfo->isStr("strncat"))
3653 return Builtin::BIstrncat;
3654 else if (FnInfo->isStr("strndup"))
3655 return Builtin::BIstrndup;
3656 else if (FnInfo->isStr("strlen"))
3657 return Builtin::BIstrlen;
3658 else if (FnInfo->isStr("bzero"))
3659 return Builtin::BIbzero;
3660 }
3661 break;
3662 }
3663 return 0;
3664}
3665
3666unsigned FunctionDecl::getODRHash() const {
3667 assert(HasODRHash)(static_cast <bool> (HasODRHash) ? void (0) : __assert_fail
("HasODRHash", "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 3667, __extension__ __PRETTY_FUNCTION__))
;
3668 return ODRHash;
3669}
3670
3671unsigned FunctionDecl::getODRHash() {
3672 if (HasODRHash)
3673 return ODRHash;
3674
3675 if (auto *FT = getInstantiatedFromMemberFunction()) {
3676 HasODRHash = true;
3677 ODRHash = FT->getODRHash();
3678 return ODRHash;
3679 }
3680
3681 class ODRHash Hash;
3682 Hash.AddFunctionDecl(this);
3683 HasODRHash = true;
3684 ODRHash = Hash.CalculateHash();
3685 return ODRHash;
3686}
3687
3688//===----------------------------------------------------------------------===//
3689// FieldDecl Implementation
3690//===----------------------------------------------------------------------===//
3691
3692FieldDecl *FieldDecl::Create(const ASTContext &C, DeclContext *DC,
3693 SourceLocation StartLoc, SourceLocation IdLoc,
3694 IdentifierInfo *Id, QualType T,
3695 TypeSourceInfo *TInfo, Expr *BW, bool Mutable,
3696 InClassInitStyle InitStyle) {
3697 return new (C, DC) FieldDecl(Decl::Field, DC, StartLoc, IdLoc, Id, T, TInfo,
3698 BW, Mutable, InitStyle);
3699}
3700
3701FieldDecl *FieldDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
3702 return new (C, ID) FieldDecl(Field, nullptr, SourceLocation(),
3703 SourceLocation(), nullptr, QualType(), nullptr,
3704 nullptr, false, ICIS_NoInit);
3705}
3706
3707bool FieldDecl::isAnonymousStructOrUnion() const {
3708 if (!isImplicit() || getDeclName())
3709 return false;
3710
3711 if (const auto *Record = getType()->getAs<RecordType>())
3712 return Record->getDecl()->isAnonymousStructOrUnion();
3713
3714 return false;
3715}
3716
3717unsigned FieldDecl::getBitWidthValue(const ASTContext &Ctx) const {
3718 assert(isBitField() && "not a bitfield")(static_cast <bool> (isBitField() && "not a bitfield"
) ? void (0) : __assert_fail ("isBitField() && \"not a bitfield\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 3718, __extension__ __PRETTY_FUNCTION__))
;
3719 return getBitWidth()->EvaluateKnownConstInt(Ctx).getZExtValue();
3720}
3721
3722bool FieldDecl::isZeroLengthBitField(const ASTContext &Ctx) const {
3723 return isUnnamedBitfield() && !getBitWidth()->isValueDependent() &&
3724 getBitWidthValue(Ctx) == 0;
3725}
3726
3727unsigned FieldDecl::getFieldIndex() const {
3728 const FieldDecl *Canonical = getCanonicalDecl();
3729 if (Canonical != this)
3730 return Canonical->getFieldIndex();
3731
3732 if (CachedFieldIndex) return CachedFieldIndex - 1;
3733
3734 unsigned Index = 0;
3735 const RecordDecl *RD = getParent()->getDefinition();
3736 assert(RD && "requested index for field of struct with no definition")(static_cast <bool> (RD && "requested index for field of struct with no definition"
) ? void (0) : __assert_fail ("RD && \"requested index for field of struct with no definition\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 3736, __extension__ __PRETTY_FUNCTION__))
;
3737
3738 for (auto *Field : RD->fields()) {
3739 Field->getCanonicalDecl()->CachedFieldIndex = Index + 1;
3740 ++Index;
3741 }
3742
3743 assert(CachedFieldIndex && "failed to find field in parent")(static_cast <bool> (CachedFieldIndex && "failed to find field in parent"
) ? void (0) : __assert_fail ("CachedFieldIndex && \"failed to find field in parent\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 3743, __extension__ __PRETTY_FUNCTION__))
;
3744 return CachedFieldIndex - 1;
3745}
3746
3747SourceRange FieldDecl::getSourceRange() const {
3748 const Expr *FinalExpr = getInClassInitializer();
3749 if (!FinalExpr)
3750 FinalExpr = getBitWidth();
3751 if (FinalExpr)
3752 return SourceRange(getInnerLocStart(), FinalExpr->getLocEnd());
3753 return DeclaratorDecl::getSourceRange();
3754}
3755
3756void FieldDecl::setCapturedVLAType(const VariableArrayType *VLAType) {
3757 assert((getParent()->isLambda() || getParent()->isCapturedRecord()) &&(static_cast <bool> ((getParent()->isLambda() || getParent
()->isCapturedRecord()) && "capturing type in non-lambda or captured record."
) ? void (0) : __assert_fail ("(getParent()->isLambda() || getParent()->isCapturedRecord()) && \"capturing type in non-lambda or captured record.\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 3758, __extension__ __PRETTY_FUNCTION__))
3758 "capturing type in non-lambda or captured record.")(static_cast <bool> ((getParent()->isLambda() || getParent
()->isCapturedRecord()) && "capturing type in non-lambda or captured record."
) ? void (0) : __assert_fail ("(getParent()->isLambda() || getParent()->isCapturedRecord()) && \"capturing type in non-lambda or captured record.\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 3758, __extension__ __PRETTY_FUNCTION__))
;
3759 assert(InitStorage.getInt() == ISK_NoInit &&(static_cast <bool> (InitStorage.getInt() == ISK_NoInit
&& InitStorage.getPointer() == nullptr && "bit width, initializer or captured type already set"
) ? void (0) : __assert_fail ("InitStorage.getInt() == ISK_NoInit && InitStorage.getPointer() == nullptr && \"bit width, initializer or captured type already set\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 3761, __extension__ __PRETTY_FUNCTION__))
3760 InitStorage.getPointer() == nullptr &&(static_cast <bool> (InitStorage.getInt() == ISK_NoInit
&& InitStorage.getPointer() == nullptr && "bit width, initializer or captured type already set"
) ? void (0) : __assert_fail ("InitStorage.getInt() == ISK_NoInit && InitStorage.getPointer() == nullptr && \"bit width, initializer or captured type already set\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 3761, __extension__ __PRETTY_FUNCTION__))
3761 "bit width, initializer or captured type already set")(static_cast <bool> (InitStorage.getInt() == ISK_NoInit
&& InitStorage.getPointer() == nullptr && "bit width, initializer or captured type already set"
) ? void (0) : __assert_fail ("InitStorage.getInt() == ISK_NoInit && InitStorage.getPointer() == nullptr && \"bit width, initializer or captured type already set\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 3761, __extension__ __PRETTY_FUNCTION__))
;
3762 InitStorage.setPointerAndInt(const_cast<VariableArrayType *>(VLAType),
3763 ISK_CapturedVLAType);
3764}
3765
3766//===----------------------------------------------------------------------===//
3767// TagDecl Implementation
3768//===----------------------------------------------------------------------===//
3769
3770SourceLocation TagDecl::getOuterLocStart() const {
3771 return getTemplateOrInnerLocStart(this);
3772}
3773
3774SourceRange TagDecl::getSourceRange() const {
3775 SourceLocation RBraceLoc = BraceRange.getEnd();
3776 SourceLocation E = RBraceLoc.isValid() ? RBraceLoc : getLocation();
3777 return SourceRange(getOuterLocStart(), E);
3778}
3779
3780TagDecl *TagDecl::getCanonicalDecl() { return getFirstDecl(); }
3781
3782void TagDecl::setTypedefNameForAnonDecl(TypedefNameDecl *TDD) {
3783 TypedefNameDeclOrQualifier = TDD;
3784 if (const Type *T = getTypeForDecl()) {
3785 (void)T;
3786 assert(T->isLinkageValid())(static_cast <bool> (T->isLinkageValid()) ? void (0)
: __assert_fail ("T->isLinkageValid()", "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 3786, __extension__ __PRETTY_FUNCTION__))
;
3787 }
3788 assert(isLinkageValid())(static_cast <bool> (isLinkageValid()) ? void (0) : __assert_fail
("isLinkageValid()", "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 3788, __extension__ __PRETTY_FUNCTION__))
;
3789}
3790
3791void TagDecl::startDefinition() {
3792 IsBeingDefined = true;
3793
3794 if (auto *D = dyn_cast<CXXRecordDecl>(this)) {
3795 struct CXXRecordDecl::DefinitionData *Data =
3796 new (getASTContext()) struct CXXRecordDecl::DefinitionData(D);
3797 for (auto I : redecls())
3798 cast<CXXRecordDecl>(I)->DefinitionData = Data;
3799 }
3800}
3801
3802void TagDecl::completeDefinition() {
3803 assert((!isa<CXXRecordDecl>(this) ||(static_cast <bool> ((!isa<CXXRecordDecl>(this) ||
cast<CXXRecordDecl>(this)->hasDefinition()) &&
"definition completed but not started") ? void (0) : __assert_fail
("(!isa<CXXRecordDecl>(this) || cast<CXXRecordDecl>(this)->hasDefinition()) && \"definition completed but not started\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 3805, __extension__ __PRETTY_FUNCTION__))
3804 cast<CXXRecordDecl>(this)->hasDefinition()) &&(static_cast <bool> ((!isa<CXXRecordDecl>(this) ||
cast<CXXRecordDecl>(this)->hasDefinition()) &&
"definition completed but not started") ? void (0) : __assert_fail
("(!isa<CXXRecordDecl>(this) || cast<CXXRecordDecl>(this)->hasDefinition()) && \"definition completed but not started\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 3805, __extension__ __PRETTY_FUNCTION__))
3805 "definition completed but not started")(static_cast <bool> ((!isa<CXXRecordDecl>(this) ||
cast<CXXRecordDecl>(this)->hasDefinition()) &&
"definition completed but not started") ? void (0) : __assert_fail
("(!isa<CXXRecordDecl>(this) || cast<CXXRecordDecl>(this)->hasDefinition()) && \"definition completed but not started\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 3805, __extension__ __PRETTY_FUNCTION__))
;
3806
3807 IsCompleteDefinition = true;
3808 IsBeingDefined = false;
3809
3810 if (ASTMutationListener *L = getASTMutationListener())
3811 L->CompletedTagDefinition(this);
3812}
3813
3814TagDecl *TagDecl::getDefinition() const {
3815 if (isCompleteDefinition())
3816 return const_cast<TagDecl *>(this);
3817
3818 // If it's possible for us to have an out-of-date definition, check now.
3819 if (MayHaveOutOfDateDef) {
3820 if (IdentifierInfo *II = getIdentifier()) {
3821 if (II->isOutOfDate()) {
3822 updateOutOfDate(*II);
3823 }
3824 }
3825 }
3826
3827 if (const auto *CXXRD = dyn_cast<CXXRecordDecl>(this))
3828 return CXXRD->getDefinition();
3829
3830 for (auto R : redecls())
3831 if (R->isCompleteDefinition())
3832 return R;
3833
3834 return nullptr;
3835}
3836
3837void TagDecl::setQualifierInfo(NestedNameSpecifierLoc QualifierLoc) {
3838 if (QualifierLoc) {
3839 // Make sure the extended qualifier info is allocated.
3840 if (!hasExtInfo())
3841 TypedefNameDeclOrQualifier = new (getASTContext()) ExtInfo;
3842 // Set qualifier info.
3843 getExtInfo()->QualifierLoc = QualifierLoc;
3844 } else {
3845 // Here Qualifier == 0, i.e., we are removing the qualifier (if any).
3846 if (hasExtInfo()) {
3847 if (getExtInfo()->NumTemplParamLists == 0) {
3848 getASTContext().Deallocate(getExtInfo());
3849 TypedefNameDeclOrQualifier = (TypedefNameDecl *)nullptr;
3850 }
3851 else
3852 getExtInfo()->QualifierLoc = QualifierLoc;
3853 }
3854 }
3855}
3856
3857void TagDecl::setTemplateParameterListsInfo(
3858 ASTContext &Context, ArrayRef<TemplateParameterList *> TPLists) {
3859 assert(!TPLists.empty())(static_cast <bool> (!TPLists.empty()) ? void (0) : __assert_fail
("!TPLists.empty()", "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 3859, __extension__ __PRETTY_FUNCTION__))
;
3860 // Make sure the extended decl info is allocated.
3861 if (!hasExtInfo())
3862 // Allocate external info struct.
3863 TypedefNameDeclOrQualifier = new (getASTContext()) ExtInfo;
3864 // Set the template parameter lists info.
3865 getExtInfo()->setTemplateParameterListsInfo(Context, TPLists);
3866}
3867
3868//===----------------------------------------------------------------------===//
3869// EnumDecl Implementation
3870//===----------------------------------------------------------------------===//
3871
3872void EnumDecl::anchor() {}
3873
3874EnumDecl *EnumDecl::Create(ASTContext &C, DeclContext *DC,
3875 SourceLocation StartLoc, SourceLocation IdLoc,
3876 IdentifierInfo *Id,
3877 EnumDecl *PrevDecl, bool IsScoped,
3878 bool IsScopedUsingClassTag, bool IsFixed) {
3879 auto *Enum = new (C, DC) EnumDecl(C, DC, StartLoc, IdLoc, Id, PrevDecl,
3880 IsScoped, IsScopedUsingClassTag, IsFixed);
3881 Enum->MayHaveOutOfDateDef = C.getLangOpts().Modules;
3882 C.getTypeDeclType(Enum, PrevDecl);
3883 return Enum;
3884}
3885
3886EnumDecl *EnumDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
3887 EnumDecl *Enum =
3888 new (C, ID) EnumDecl(C, nullptr, SourceLocation(), SourceLocation(),
3889 nullptr, nullptr, false, false, false);
3890 Enum->MayHaveOutOfDateDef = C.getLangOpts().Modules;
3891 return Enum;
3892}
3893
3894SourceRange EnumDecl::getIntegerTypeRange() const {
3895 if (const TypeSourceInfo *TI = getIntegerTypeSourceInfo())
3896 return TI->getTypeLoc().getSourceRange();
3897 return SourceRange();
3898}
3899
3900void EnumDecl::completeDefinition(QualType NewType,
3901 QualType NewPromotionType,
3902 unsigned NumPositiveBits,
3903 unsigned NumNegativeBits) {
3904 assert(!isCompleteDefinition() && "Cannot redefine enums!")(static_cast <bool> (!isCompleteDefinition() &&
"Cannot redefine enums!") ? void (0) : __assert_fail ("!isCompleteDefinition() && \"Cannot redefine enums!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 3904, __extension__ __PRETTY_FUNCTION__))
;
3905 if (!IntegerType)
3906 IntegerType = NewType.getTypePtr();
3907 PromotionType = NewPromotionType;
3908 setNumPositiveBits(NumPositiveBits);
3909 setNumNegativeBits(NumNegativeBits);
3910 TagDecl::completeDefinition();
3911}
3912
3913bool EnumDecl::isClosed() const {
3914 if (const auto *A = getAttr<EnumExtensibilityAttr>())
3915 return A->getExtensibility() == EnumExtensibilityAttr::Closed;
3916 return true;
3917}
3918
3919bool EnumDecl::isClosedFlag() const {
3920 return isClosed() && hasAttr<FlagEnumAttr>();
3921}
3922
3923bool EnumDecl::isClosedNonFlag() const {
3924 return isClosed() && !hasAttr<FlagEnumAttr>();
3925}
3926
3927TemplateSpecializationKind EnumDecl::getTemplateSpecializationKind() const {
3928 if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo())
3929 return MSI->getTemplateSpecializationKind();
3930
3931 return TSK_Undeclared;
3932}
3933
3934void EnumDecl::setTemplateSpecializationKind(TemplateSpecializationKind TSK,
3935 SourceLocation PointOfInstantiation) {
3936 MemberSpecializationInfo *MSI = getMemberSpecializationInfo();
3937 assert(MSI && "Not an instantiated member enumeration?")(static_cast <bool> (MSI && "Not an instantiated member enumeration?"
) ? void (0) : __assert_fail ("MSI && \"Not an instantiated member enumeration?\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 3937, __extension__ __PRETTY_FUNCTION__))
;
3938 MSI->setTemplateSpecializationKind(TSK);
3939 if (TSK != TSK_ExplicitSpecialization &&
3940 PointOfInstantiation.isValid() &&
3941 MSI->getPointOfInstantiation().isInvalid())
3942 MSI->setPointOfInstantiation(PointOfInstantiation);
3943}
3944
3945EnumDecl *EnumDecl::getTemplateInstantiationPattern() const {
3946 if (MemberSpecializationInfo *MSInfo = getMemberSpecializationInfo()) {
3947 if (isTemplateInstantiation(MSInfo->getTemplateSpecializationKind())) {
3948 EnumDecl *ED = getInstantiatedFromMemberEnum();
3949 while (auto *NewED = ED->getInstantiatedFromMemberEnum())
3950 ED = NewED;
3951 return getDefinitionOrSelf(ED);
3952 }
3953 }
3954
3955 assert(!isTemplateInstantiation(getTemplateSpecializationKind()) &&(static_cast <bool> (!isTemplateInstantiation(getTemplateSpecializationKind
()) && "couldn't find pattern for enum instantiation"
) ? void (0) : __assert_fail ("!isTemplateInstantiation(getTemplateSpecializationKind()) && \"couldn't find pattern for enum instantiation\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 3956, __extension__ __PRETTY_FUNCTION__))
3956 "couldn't find pattern for enum instantiation")(static_cast <bool> (!isTemplateInstantiation(getTemplateSpecializationKind
()) && "couldn't find pattern for enum instantiation"
) ? void (0) : __assert_fail ("!isTemplateInstantiation(getTemplateSpecializationKind()) && \"couldn't find pattern for enum instantiation\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 3956, __extension__ __PRETTY_FUNCTION__))
;
3957 return nullptr;
3958}
3959
3960EnumDecl *EnumDecl::getInstantiatedFromMemberEnum() const {
3961 if (SpecializationInfo)
3962 return cast<EnumDecl>(SpecializationInfo->getInstantiatedFrom());
3963
3964 return nullptr;
3965}
3966
3967void EnumDecl::setInstantiationOfMemberEnum(ASTContext &C, EnumDecl *ED,
3968 TemplateSpecializationKind TSK) {
3969 assert(!SpecializationInfo && "Member enum is already a specialization")(static_cast <bool> (!SpecializationInfo && "Member enum is already a specialization"
) ? void (0) : __assert_fail ("!SpecializationInfo && \"Member enum is already a specialization\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 3969, __extension__ __PRETTY_FUNCTION__))
;
3970 SpecializationInfo = new (C) MemberSpecializationInfo(ED, TSK);
3971}
3972
3973unsigned EnumDecl::getODRHash() {
3974 if (HasODRHash)
3975 return ODRHash;
3976
3977 class ODRHash Hash;
3978 Hash.AddEnumDecl(this);
3979 HasODRHash = true;
3980 ODRHash = Hash.CalculateHash();
3981 return ODRHash;
3982}
3983
3984//===----------------------------------------------------------------------===//
3985// RecordDecl Implementation
3986//===----------------------------------------------------------------------===//
3987
3988RecordDecl::RecordDecl(Kind DK, TagKind TK, const ASTContext &C,
3989 DeclContext *DC, SourceLocation StartLoc,
3990 SourceLocation IdLoc, IdentifierInfo *Id,
3991 RecordDecl *PrevDecl)
3992 : TagDecl(DK, TK, C, DC, IdLoc, Id, PrevDecl, StartLoc),
3993 HasFlexibleArrayMember(false), AnonymousStructOrUnion(false),
3994 HasObjectMember(false), HasVolatileMember(false),
3995 LoadedFieldsFromExternalStorage(false),
3996 NonTrivialToPrimitiveDefaultInitialize(false),
3997 NonTrivialToPrimitiveCopy(false), NonTrivialToPrimitiveDestroy(false),
3998 ParamDestroyedInCallee(false), ArgPassingRestrictions(APK_CanPassInRegs) {
3999 assert(classof(static_cast<Decl*>(this)) && "Invalid Kind!")(static_cast <bool> (classof(static_cast<Decl*>(this
)) && "Invalid Kind!") ? void (0) : __assert_fail ("classof(static_cast<Decl*>(this)) && \"Invalid Kind!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 3999, __extension__ __PRETTY_FUNCTION__))
;
4000}
4001
4002RecordDecl *RecordDecl::Create(const ASTContext &C, TagKind TK, DeclContext *DC,
4003 SourceLocation StartLoc, SourceLocation IdLoc,
4004 IdentifierInfo *Id, RecordDecl* PrevDecl) {
4005 RecordDecl *R = new (C, DC) RecordDecl(Record, TK, C, DC,
4006 StartLoc, IdLoc, Id, PrevDecl);
4007 R->MayHaveOutOfDateDef = C.getLangOpts().Modules;
4008
4009 C.getTypeDeclType(R, PrevDecl);
4010 return R;
4011}
4012
4013RecordDecl *RecordDecl::CreateDeserialized(const ASTContext &C, unsigned ID) {
4014 RecordDecl *R =
4015 new (C, ID) RecordDecl(Record, TTK_Struct, C, nullptr, SourceLocation(),
4016 SourceLocation(), nullptr, nullptr);
4017 R->MayHaveOutOfDateDef = C.getLangOpts().Modules;
4018 return R;
4019}
4020
4021bool RecordDecl::isInjectedClassName() const {
4022 return isImplicit() && getDeclName() && getDeclContext()->isRecord() &&
4023 cast<RecordDecl>(getDeclContext())->getDeclName() == getDeclName();
4024}
4025
4026bool RecordDecl::isLambda() const {
4027 if (auto RD = dyn_cast<CXXRecordDecl>(this))
4028 return RD->isLambda();
4029 return false;
4030}
4031
4032bool RecordDecl::isCapturedRecord() const {
4033 return hasAttr<CapturedRecordAttr>();
4034}
4035
4036void RecordDecl::setCapturedRecord() {
4037 addAttr(CapturedRecordAttr::CreateImplicit(getASTContext()));
4038}
4039
4040RecordDecl::field_iterator RecordDecl::field_begin() const {
4041 if (hasExternalLexicalStorage() && !LoadedFieldsFromExternalStorage)
4042 LoadFieldsFromExternalStorage();
4043
4044 return field_iterator(decl_iterator(FirstDecl));
4045}
4046
4047/// completeDefinition - Notes that the definition of this type is now
4048/// complete.
4049void RecordDecl::completeDefinition() {
4050 assert(!isCompleteDefinition() && "Cannot redefine record!")(static_cast <bool> (!isCompleteDefinition() &&
"Cannot redefine record!") ? void (0) : __assert_fail ("!isCompleteDefinition() && \"Cannot redefine record!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 4050, __extension__ __PRETTY_FUNCTION__))
;
4051 TagDecl::completeDefinition();
4052}
4053
4054/// isMsStruct - Get whether or not this record uses ms_struct layout.
4055/// This which can be turned on with an attribute, pragma, or the
4056/// -mms-bitfields command-line option.
4057bool RecordDecl::isMsStruct(const ASTContext &C) const {
4058 return hasAttr<MSStructAttr>() || C.getLangOpts().MSBitfields == 1;
4059}
4060
4061void RecordDecl::LoadFieldsFromExternalStorage() const {
4062 ExternalASTSource *Source = getASTContext().getExternalSource();
4063 assert(hasExternalLexicalStorage() && Source && "No external storage?")(static_cast <bool> (hasExternalLexicalStorage() &&
Source && "No external storage?") ? void (0) : __assert_fail
("hasExternalLexicalStorage() && Source && \"No external storage?\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 4063, __extension__ __PRETTY_FUNCTION__))
;
4064
4065 // Notify that we have a RecordDecl doing some initialization.
4066 ExternalASTSource::Deserializing TheFields(Source);
4067
4068 SmallVector<Decl*, 64> Decls;
4069 LoadedFieldsFromExternalStorage = true;
4070 Source->FindExternalLexicalDecls(this, [](Decl::Kind K) {
4071 return FieldDecl::classofKind(K) || IndirectFieldDecl::classofKind(K);
4072 }, Decls);
4073
4074#ifndef NDEBUG
4075 // Check that all decls we got were FieldDecls.
4076 for (unsigned i=0, e=Decls.size(); i != e; ++i)
4077 assert(isa<FieldDecl>(Decls[i]) || isa<IndirectFieldDecl>(Decls[i]))(static_cast <bool> (isa<FieldDecl>(Decls[i]) || isa
<IndirectFieldDecl>(Decls[i])) ? void (0) : __assert_fail
("isa<FieldDecl>(Decls[i]) || isa<IndirectFieldDecl>(Decls[i])"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 4077, __extension__ __PRETTY_FUNCTION__))
;
4078#endif
4079
4080 if (Decls.empty())
4081 return;
4082
4083 std::tie(FirstDecl, LastDecl) = BuildDeclChain(Decls,
4084 /*FieldsAlreadyLoaded=*/false);
4085}
4086
4087bool RecordDecl::mayInsertExtraPadding(bool EmitRemark) const {
4088 ASTContext &Context = getASTContext();
4089 const SanitizerMask EnabledAsanMask = Context.getLangOpts().Sanitize.Mask &
4090 (SanitizerKind::Address | SanitizerKind::KernelAddress);
4091 if (!EnabledAsanMask || !Context.getLangOpts().SanitizeAddressFieldPadding)
4092 return false;
4093 const auto &Blacklist = Context.getSanitizerBlacklist();
4094 const auto *CXXRD = dyn_cast<CXXRecordDecl>(this);
4095 // We may be able to relax some of these requirements.
4096 int ReasonToReject = -1;
4097 if (!CXXRD || CXXRD->isExternCContext())
4098 ReasonToReject = 0; // is not C++.
4099 else if (CXXRD->hasAttr<PackedAttr>())
4100 ReasonToReject = 1; // is packed.
4101 else if (CXXRD->isUnion())
4102 ReasonToReject = 2; // is a union.
4103 else if (CXXRD->isTriviallyCopyable())
4104 ReasonToReject = 3; // is trivially copyable.
4105 else if (CXXRD->hasTrivialDestructor())
4106 ReasonToReject = 4; // has trivial destructor.
4107 else if (CXXRD->isStandardLayout())
4108 ReasonToReject = 5; // is standard layout.
4109 else if (Blacklist.isBlacklistedLocation(EnabledAsanMask, getLocation(),
4110 "field-padding"))
4111 ReasonToReject = 6; // is in a blacklisted file.
4112 else if (Blacklist.isBlacklistedType(EnabledAsanMask,
4113 getQualifiedNameAsString(),
4114 "field-padding"))
4115 ReasonToReject = 7; // is blacklisted.
4116
4117 if (EmitRemark) {
4118 if (ReasonToReject >= 0)
4119 Context.getDiagnostics().Report(
4120 getLocation(),
4121 diag::remark_sanitize_address_insert_extra_padding_rejected)
4122 << getQualifiedNameAsString() << ReasonToReject;
4123 else
4124 Context.getDiagnostics().Report(
4125 getLocation(),
4126 diag::remark_sanitize_address_insert_extra_padding_accepted)
4127 << getQualifiedNameAsString();
4128 }
4129 return ReasonToReject < 0;
4130}
4131
4132const FieldDecl *RecordDecl::findFirstNamedDataMember() const {
4133 for (const auto *I : fields()) {
4134 if (I->getIdentifier())
4135 return I;
4136
4137 if (const auto *RT = I->getType()->getAs<RecordType>())
4138 if (const FieldDecl *NamedDataMember =
4139 RT->getDecl()->findFirstNamedDataMember())
4140 return NamedDataMember;
4141 }
4142
4143 // We didn't find a named data member.
4144 return nullptr;
4145}
4146
4147//===----------------------------------------------------------------------===//
4148// BlockDecl Implementation
4149//===----------------------------------------------------------------------===//
4150
4151void BlockDecl::setParams(ArrayRef<ParmVarDecl *> NewParamInfo) {
4152 assert(!ParamInfo && "Already has param info!")(static_cast <bool> (!ParamInfo && "Already has param info!"
) ? void (0) : __assert_fail ("!ParamInfo && \"Already has param info!\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 4152, __extension__ __PRETTY_FUNCTION__))
;
4153
4154 // Zero params -> null pointer.
4155 if (!NewParamInfo.empty()) {
4156 NumParams = NewParamInfo.size();
4157 ParamInfo = new (getASTContext()) ParmVarDecl*[NewParamInfo.size()];
4158 std::copy(NewParamInfo.begin(), NewParamInfo.end(), ParamInfo);
4159 }
4160}
4161
4162void BlockDecl::setCaptures(ASTContext &Context, ArrayRef<Capture> Captures,
4163 bool CapturesCXXThis) {
4164 this->CapturesCXXThis = CapturesCXXThis;
4165 this->NumCaptures = Captures.size();
4166
4167 if (Captures.empty()) {
4168 this->Captures = nullptr;
4169 return;
4170 }
4171
4172 this->Captures = Captures.copy(Context).data();
4173}
4174
4175bool BlockDecl::capturesVariable(const VarDecl *variable) const {
4176 for (const auto &I : captures())
4177 // Only auto vars can be captured, so no redeclaration worries.
4178 if (I.getVariable() == variable)
4179 return true;
4180
4181 return false;
4182}
4183
4184SourceRange BlockDecl::getSourceRange() const {
4185 return SourceRange(getLocation(), Body? Body->getLocEnd() : getLocation());
4186}
4187
4188//===----------------------------------------------------------------------===//
4189// Other Decl Allocation/Deallocation Method Implementations
4190//===----------------------------------------------------------------------===//
4191
4192void TranslationUnitDecl::anchor() {}
4193
4194TranslationUnitDecl *TranslationUnitDecl::Create(ASTContext &C) {
4195 return new (C, (DeclContext *)nullptr) TranslationUnitDecl(C);
4196}
4197
4198void PragmaCommentDecl::anchor() {}
4199
4200PragmaCommentDecl *PragmaCommentDecl::Create(const ASTContext &C,
4201 TranslationUnitDecl *DC,
4202 SourceLocation CommentLoc,
4203 PragmaMSCommentKind CommentKind,
4204 StringRef Arg) {
4205 PragmaCommentDecl *PCD =
4206 new (C, DC, additionalSizeToAlloc<char>(Arg.size() + 1))
4207 PragmaCommentDecl(DC, CommentLoc, CommentKind);
4208 memcpy(PCD->getTrailingObjects<char>(), Arg.data(), Arg.size());
4209 PCD->getTrailingObjects<char>()[Arg.size()] = '\0';
4210 return PCD;
4211}
4212
4213PragmaCommentDecl *PragmaCommentDecl::CreateDeserialized(ASTContext &C,
4214 unsigned ID,
4215 unsigned ArgSize) {
4216 return new (C, ID, additionalSizeToAlloc<char>(ArgSize + 1))
4217 PragmaCommentDecl(nullptr, SourceLocation(), PCK_Unknown);
4218}
4219
4220void PragmaDetectMismatchDecl::anchor() {}
4221
4222PragmaDetectMismatchDecl *
4223PragmaDetectMismatchDecl::Create(const ASTContext &C, TranslationUnitDecl *DC,
4224 SourceLocation Loc, StringRef Name,
4225 StringRef Value) {
4226 size_t ValueStart = Name.size() + 1;
4227 PragmaDetectMismatchDecl *PDMD =
4228 new (C, DC, additionalSizeToAlloc<char>(ValueStart + Value.size() + 1))
4229 PragmaDetectMismatchDecl(DC, Loc, ValueStart);
4230 memcpy(PDMD->getTrailingObjects<char>(), Name.data(), Name.size());
4231 PDMD->getTrailingObjects<char>()[Name.size()] = '\0';
4232 memcpy(PDMD->getTrailingObjects<char>() + ValueStart, Value.data(),
4233 Value.size());
4234 PDMD->getTrailingObjects<char>()[ValueStart + Value.size()] = '\0';
4235 return PDMD;
4236}
4237
4238PragmaDetectMismatchDecl *
4239PragmaDetectMismatchDecl::CreateDeserialized(ASTContext &C, unsigned ID,
4240 unsigned NameValueSize) {
4241 return new (C, ID, additionalSizeToAlloc<char>(NameValueSize + 1))
4242 PragmaDetectMismatchDecl(nullptr, SourceLocation(), 0);
4243}
4244
4245void ExternCContextDecl::anchor() {}
4246
4247ExternCContextDecl *ExternCContextDecl::Create(const ASTContext &C,
4248 TranslationUnitDecl *DC) {
4249 return new (C, DC) ExternCContextDecl(DC);
4250}
4251
4252void LabelDecl::anchor() {}
4253
4254LabelDecl *LabelDecl::Create(ASTContext &C, DeclContext *DC,
4255 SourceLocation IdentL, IdentifierInfo *II) {
4256 return new (C, DC) LabelDecl(DC, IdentL, II, nullptr, IdentL);
4257}
4258
4259LabelDecl *LabelDecl::Create(ASTContext &C, DeclContext *DC,
4260 SourceLocation IdentL, IdentifierInfo *II,
4261 SourceLocation GnuLabelL) {
4262 assert(GnuLabelL != IdentL && "Use this only for GNU local labels")(static_cast <bool> (GnuLabelL != IdentL && "Use this only for GNU local labels"
) ? void (0) : __assert_fail ("GnuLabelL != IdentL && \"Use this only for GNU local labels\""
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 4262, __extension__ __PRETTY_FUNCTION__))
;
4263 return new (C, DC) LabelDecl(DC, IdentL, II, nullptr, GnuLabelL);
4264}
4265
4266LabelDecl *LabelDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
4267 return new (C, ID) LabelDecl(nullptr, SourceLocation(), nullptr, nullptr,
4268 SourceLocation());
4269}
4270
4271void LabelDecl::setMSAsmLabel(StringRef Name) {
4272 char *Buffer = new (getASTContext(), 1) char[Name.size() + 1];
1
'Buffer' initialized to a null pointer value
4273 memcpy(Buffer, Name.data(), Name.size());
2
Null pointer passed as an argument to a 'nonnull' parameter
4274 Buffer[Name.size()] = '\0';
4275 MSAsmName = Buffer;
4276}
4277
4278void ValueDecl::anchor() {}
4279
4280bool ValueDecl::isWeak() const {
4281 for (const auto *I : attrs())
4282 if (isa<WeakAttr>(I) || isa<WeakRefAttr>(I))
4283 return true;
4284
4285 return isWeakImported();
4286}
4287
4288void ImplicitParamDecl::anchor() {}
4289
4290ImplicitParamDecl *ImplicitParamDecl::Create(ASTContext &C, DeclContext *DC,
4291 SourceLocation IdLoc,
4292 IdentifierInfo *Id, QualType Type,
4293 ImplicitParamKind ParamKind) {
4294 return new (C, DC) ImplicitParamDecl(C, DC, IdLoc, Id, Type, ParamKind);
4295}
4296
4297ImplicitParamDecl *ImplicitParamDecl::Create(ASTContext &C, QualType Type,
4298 ImplicitParamKind ParamKind) {
4299 return new (C, nullptr) ImplicitParamDecl(C, Type, ParamKind);
4300}
4301
4302ImplicitParamDecl *ImplicitParamDecl::CreateDeserialized(ASTContext &C,
4303 unsigned ID) {
4304 return new (C, ID) ImplicitParamDecl(C, QualType(), ImplicitParamKind::Other);
4305}
4306
4307FunctionDecl *FunctionDecl::Create(ASTContext &C, DeclContext *DC,
4308 SourceLocation StartLoc,
4309 const DeclarationNameInfo &NameInfo,
4310 QualType T, TypeSourceInfo *TInfo,
4311 StorageClass SC,
4312 bool isInlineSpecified,
4313 bool hasWrittenPrototype,
4314 bool isConstexprSpecified) {
4315 FunctionDecl *New =
4316 new (C, DC) FunctionDecl(Function, C, DC, StartLoc, NameInfo, T, TInfo,
4317 SC, isInlineSpecified, isConstexprSpecified);
4318 New->HasWrittenPrototype = hasWrittenPrototype;
4319 return New;
4320}
4321
4322FunctionDecl *FunctionDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
4323 return new (C, ID) FunctionDecl(Function, C, nullptr, SourceLocation(),
4324 DeclarationNameInfo(), QualType(), nullptr,
4325 SC_None, false, false);
4326}
4327
4328BlockDecl *BlockDecl::Create(ASTContext &C, DeclContext *DC, SourceLocation L) {
4329 return new (C, DC) BlockDecl(DC, L);
4330}
4331
4332BlockDecl *BlockDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
4333 return new (C, ID) BlockDecl(nullptr, SourceLocation());
4334}
4335
4336CapturedDecl::CapturedDecl(DeclContext *DC, unsigned NumParams)
4337 : Decl(Captured, DC, SourceLocation()), DeclContext(Captured),
4338 NumParams(NumParams), ContextParam(0), BodyAndNothrow(nullptr, false) {}
4339
4340CapturedDecl *CapturedDecl::Create(ASTContext &C, DeclContext *DC,
4341 unsigned NumParams) {
4342 return new (C, DC, additionalSizeToAlloc<ImplicitParamDecl *>(NumParams))
4343 CapturedDecl(DC, NumParams);
4344}
4345
4346CapturedDecl *CapturedDecl::CreateDeserialized(ASTContext &C, unsigned ID,
4347 unsigned NumParams) {
4348 return new (C, ID, additionalSizeToAlloc<ImplicitParamDecl *>(NumParams))
4349 CapturedDecl(nullptr, NumParams);
4350}
4351
4352Stmt *CapturedDecl::getBody() const { return BodyAndNothrow.getPointer(); }
4353void CapturedDecl::setBody(Stmt *B) { BodyAndNothrow.setPointer(B); }
4354
4355bool CapturedDecl::isNothrow() const { return BodyAndNothrow.getInt(); }
4356void CapturedDecl::setNothrow(bool Nothrow) { BodyAndNothrow.setInt(Nothrow); }
4357
4358EnumConstantDecl *EnumConstantDecl::Create(ASTContext &C, EnumDecl *CD,
4359 SourceLocation L,
4360 IdentifierInfo *Id, QualType T,
4361 Expr *E, const llvm::APSInt &V) {
4362 return new (C, CD) EnumConstantDecl(CD, L, Id, T, E, V);
4363}
4364
4365EnumConstantDecl *
4366EnumConstantDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
4367 return new (C, ID) EnumConstantDecl(nullptr, SourceLocation(), nullptr,
4368 QualType(), nullptr, llvm::APSInt());
4369}
4370
4371void IndirectFieldDecl::anchor() {}
4372
4373IndirectFieldDecl::IndirectFieldDecl(ASTContext &C, DeclContext *DC,
4374 SourceLocation L, DeclarationName N,
4375 QualType T,
4376 MutableArrayRef<NamedDecl *> CH)
4377 : ValueDecl(IndirectField, DC, L, N, T), Chaining(CH.data()),
4378 ChainingSize(CH.size()) {
4379 // In C++, indirect field declarations conflict with tag declarations in the
4380 // same scope, so add them to IDNS_Tag so that tag redeclaration finds them.
4381 if (C.getLangOpts().CPlusPlus)
4382 IdentifierNamespace |= IDNS_Tag;
4383}
4384
4385IndirectFieldDecl *
4386IndirectFieldDecl::Create(ASTContext &C, DeclContext *DC, SourceLocation L,
4387 IdentifierInfo *Id, QualType T,
4388 llvm::MutableArrayRef<NamedDecl *> CH) {
4389 return new (C, DC) IndirectFieldDecl(C, DC, L, Id, T, CH);
4390}
4391
4392IndirectFieldDecl *IndirectFieldDecl::CreateDeserialized(ASTContext &C,
4393 unsigned ID) {
4394 return new (C, ID) IndirectFieldDecl(C, nullptr, SourceLocation(),
4395 DeclarationName(), QualType(), None);
4396}
4397
4398SourceRange EnumConstantDecl::getSourceRange() const {
4399 SourceLocation End = getLocation();
4400 if (Init)
4401 End = Init->getLocEnd();
4402 return SourceRange(getLocation(), End);
4403}
4404
4405void TypeDecl::anchor() {}
4406
4407TypedefDecl *TypedefDecl::Create(ASTContext &C, DeclContext *DC,
4408 SourceLocation StartLoc, SourceLocation IdLoc,
4409 IdentifierInfo *Id, TypeSourceInfo *TInfo) {
4410 return new (C, DC) TypedefDecl(C, DC, StartLoc, IdLoc, Id, TInfo);
4411}
4412
4413void TypedefNameDecl::anchor() {}
4414
4415TagDecl *TypedefNameDecl::getAnonDeclWithTypedefName(bool AnyRedecl) const {
4416 if (auto *TT = getTypeSourceInfo()->getType()->getAs<TagType>()) {
4417 auto *OwningTypedef = TT->getDecl()->getTypedefNameForAnonDecl();
4418 auto *ThisTypedef = this;
4419 if (AnyRedecl && OwningTypedef) {
4420 OwningTypedef = OwningTypedef->getCanonicalDecl();
4421 ThisTypedef = ThisTypedef->getCanonicalDecl();
4422 }
4423 if (OwningTypedef == ThisTypedef)
4424 return TT->getDecl();
4425 }
4426
4427 return nullptr;
4428}
4429
4430bool TypedefNameDecl::isTransparentTagSlow() const {
4431 auto determineIsTransparent = [&]() {
4432 if (auto *TT = getUnderlyingType()->getAs<TagType>()) {
4433 if (auto *TD = TT->getDecl()) {
4434 if (TD->getName() != getName())
4435 return false;
4436 SourceLocation TTLoc = getLocation();
4437 SourceLocation TDLoc = TD->getLocation();
4438 if (!TTLoc.isMacroID() || !TDLoc.isMacroID())
4439 return false;
4440 SourceManager &SM = getASTContext().getSourceManager();
4441 return SM.getSpellingLoc(TTLoc) == SM.getSpellingLoc(TDLoc);
4442 }
4443 }
4444 return false;
4445 };
4446
4447 bool isTransparent = determineIsTransparent();
4448 MaybeModedTInfo.setInt((isTransparent << 1) | 1);
4449 return isTransparent;
4450}
4451
4452TypedefDecl *TypedefDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
4453 return new (C, ID) TypedefDecl(C, nullptr, SourceLocation(), SourceLocation(),
4454 nullptr, nullptr);
4455}
4456
4457TypeAliasDecl *TypeAliasDecl::Create(ASTContext &C, DeclContext *DC,
4458 SourceLocation StartLoc,
4459 SourceLocation IdLoc, IdentifierInfo *Id,
4460 TypeSourceInfo *TInfo) {
4461 return new (C, DC) TypeAliasDecl(C, DC, StartLoc, IdLoc, Id, TInfo);
4462}
4463
4464TypeAliasDecl *TypeAliasDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
4465 return new (C, ID) TypeAliasDecl(C, nullptr, SourceLocation(),
4466 SourceLocation(), nullptr, nullptr);
4467}
4468
4469SourceRange TypedefDecl::getSourceRange() const {
4470 SourceLocation RangeEnd = getLocation();
4471 if (TypeSourceInfo *TInfo = getTypeSourceInfo()) {
4472 if (typeIsPostfix(TInfo->getType()))
4473 RangeEnd = TInfo->getTypeLoc().getSourceRange().getEnd();
4474 }
4475 return SourceRange(getLocStart(), RangeEnd);
4476}
4477
4478SourceRange TypeAliasDecl::getSourceRange() const {
4479 SourceLocation RangeEnd = getLocStart();
4480 if (TypeSourceInfo *TInfo = getTypeSourceInfo())
4481 RangeEnd = TInfo->getTypeLoc().getSourceRange().getEnd();
4482 return SourceRange(getLocStart(), RangeEnd);
4483}
4484
4485void FileScopeAsmDecl::anchor() {}
4486
4487FileScopeAsmDecl *FileScopeAsmDecl::Create(ASTContext &C, DeclContext *DC,
4488 StringLiteral *Str,
4489 SourceLocation AsmLoc,
4490 SourceLocation RParenLoc) {
4491 return new (C, DC) FileScopeAsmDecl(DC, Str, AsmLoc, RParenLoc);
4492}
4493
4494FileScopeAsmDecl *FileScopeAsmDecl::CreateDeserialized(ASTContext &C,
4495 unsigned ID) {
4496 return new (C, ID) FileScopeAsmDecl(nullptr, nullptr, SourceLocation(),
4497 SourceLocation());
4498}
4499
4500void EmptyDecl::anchor() {}
4501
4502EmptyDecl *EmptyDecl::Create(ASTContext &C, DeclContext *DC, SourceLocation L) {
4503 return new (C, DC) EmptyDecl(DC, L);
4504}
4505
4506EmptyDecl *EmptyDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
4507 return new (C, ID) EmptyDecl(nullptr, SourceLocation());
4508}
4509
4510//===----------------------------------------------------------------------===//
4511// ImportDecl Implementation
4512//===----------------------------------------------------------------------===//
4513
4514/// Retrieve the number of module identifiers needed to name the given
4515/// module.
4516static unsigned getNumModuleIdentifiers(Module *Mod) {
4517 unsigned Result = 1;
4518 while (Mod->Parent) {
4519 Mod = Mod->Parent;
4520 ++Result;
4521 }
4522 return Result;
4523}
4524
4525ImportDecl::ImportDecl(DeclContext *DC, SourceLocation StartLoc,
4526 Module *Imported,
4527 ArrayRef<SourceLocation> IdentifierLocs)
4528 : Decl(Import, DC, StartLoc), ImportedAndComplete(Imported, true) {
4529 assert(getNumModuleIdentifiers(Imported) == IdentifierLocs.size())(static_cast <bool> (getNumModuleIdentifiers(Imported) ==
IdentifierLocs.size()) ? void (0) : __assert_fail ("getNumModuleIdentifiers(Imported) == IdentifierLocs.size()"
, "/build/llvm-toolchain-snapshot-7~svn338205/tools/clang/lib/AST/Decl.cpp"
, 4529, __extension__ __PRETTY_FUNCTION__))
;
4530 auto *StoredLocs = getTrailingObjects<SourceLocation>();
4531 std::uninitialized_copy(IdentifierLocs.begin(), IdentifierLocs.end(),
4532 StoredLocs);
4533}
4534
4535ImportDecl::ImportDecl(DeclContext *DC, SourceLocation StartLoc,
4536 Module *Imported, SourceLocation EndLoc)
4537 : Decl(Import, DC, StartLoc), ImportedAndComplete(Imported, false) {
4538 *getTrailingObjects<SourceLocation>() = EndLoc;
4539}
4540
4541ImportDecl *ImportDecl::Create(ASTContext &C, DeclContext *DC,
4542 SourceLocation StartLoc, Module *Imported,
4543 ArrayRef<SourceLocation> IdentifierLocs) {
4544 return new (C, DC,
4545 additionalSizeToAlloc<SourceLocation>(IdentifierLocs.size()))
4546 ImportDecl(DC, StartLoc, Imported, IdentifierLocs);
4547}
4548
4549ImportDecl *ImportDecl::CreateImplicit(ASTContext &C, DeclContext *DC,
4550 SourceLocation StartLoc,
4551 Module *Imported,
4552 SourceLocation EndLoc) {
4553 ImportDecl *Import = new (C, DC, additionalSizeToAlloc<SourceLocation>(1))
4554 ImportDecl(DC, StartLoc, Imported, EndLoc);
4555 Import->setImplicit();
4556 return Import;
4557}
4558
4559ImportDecl *ImportDecl::CreateDeserialized(ASTContext &C, unsigned ID,
4560 unsigned NumLocations) {
4561 return new (C, ID, additionalSizeToAlloc<SourceLocation>(NumLocations))
4562 ImportDecl(EmptyShell());
4563}
4564
4565ArrayRef<SourceLocation> ImportDecl::getIdentifierLocs() const {
4566 if (!ImportedAndComplete.getInt())
4567 return None;
4568
4569 const auto *StoredLocs = getTrailingObjects<SourceLocation>();
4570 return llvm::makeArrayRef(StoredLocs,
4571 getNumModuleIdentifiers(getImportedModule()));
4572}
4573
4574SourceRange ImportDecl::getSourceRange() const {
4575 if (!ImportedAndComplete.getInt())
4576 return SourceRange(getLocation(), *getTrailingObjects<SourceLocation>());
4577
4578 return SourceRange(getLocation(), getIdentifierLocs().back());
4579}
4580
4581//===----------------------------------------------------------------------===//
4582// ExportDecl Implementation
4583//===----------------------------------------------------------------------===//
4584
4585void ExportDecl::anchor() {}
4586
4587ExportDecl *ExportDecl::Create(ASTContext &C, DeclContext *DC,
4588 SourceLocation ExportLoc) {
4589 return new (C, DC) ExportDecl(DC, ExportLoc);
4590}
4591
4592ExportDecl *ExportDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
4593 return new (C, ID) ExportDecl(nullptr, SourceLocation());
4594}