Bug Summary

File:tools/clang/lib/AST/Decl.cpp
Warning:line 4201, 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~svn325118/build-llvm/tools/clang/lib/AST -I /build/llvm-toolchain-snapshot-7~svn325118/tools/clang/lib/AST -I /build/llvm-toolchain-snapshot-7~svn325118/tools/clang/include -I /build/llvm-toolchain-snapshot-7~svn325118/build-llvm/tools/clang/include -I /build/llvm-toolchain-snapshot-7~svn325118/build-llvm/include -I /build/llvm-toolchain-snapshot-7~svn325118/include -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.3.0/../../../../include/c++/7.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.3.0/../../../../include/x86_64-linux-gnu/c++/7.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.3.0/../../../../include/x86_64-linux-gnu/c++/7.3.0 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/7.3.0/../../../../include/c++/7.3.0/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/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O2 -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-comment -std=c++11 -fdeprecated-macro -fdebug-compilation-dir /build/llvm-toolchain-snapshot-7~svn325118/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-checker optin.performance.Padding -analyzer-output=html -analyzer-config stable-report-filename=true -o /tmp/scan-build-2018-02-14-150435-17243-1 -x c++ /build/llvm-toolchain-snapshot-7~svn325118/tools/clang/lib/AST/Decl.cpp
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/PrettyPrinter.h"
31#include "clang/AST/Redeclarable.h"
32#include "clang/AST/Stmt.h"
33#include "clang/AST/TemplateBase.h"
34#include "clang/AST/Type.h"
35#include "clang/AST/TypeLoc.h"
36#include "clang/Basic/Builtins.h"
37#include "clang/Basic/IdentifierTable.h"
38#include "clang/Basic/LLVM.h"
39#include "clang/Basic/LangOptions.h"
40#include "clang/Basic/Linkage.h"
41#include "clang/Basic/Module.h"
42#include "clang/Basic/PartialDiagnostic.h"
43#include "clang/Basic/SanitizerBlacklist.h"
44#include "clang/Basic/Sanitizers.h"
45#include "clang/Basic/SourceLocation.h"
46#include "clang/Basic/SourceManager.h"
47#include "clang/Basic/Specifiers.h"
48#include "clang/Basic/TargetCXXABI.h"
49#include "clang/Basic/TargetInfo.h"
50#include "clang/Basic/Visibility.h"
51#include "clang/Frontend/FrontendDiagnostic.h"
52#include "llvm/ADT/APSInt.h"
53#include "llvm/ADT/ArrayRef.h"
54#include "llvm/ADT/None.h"
55#include "llvm/ADT/Optional.h"
56#include "llvm/ADT/STLExtras.h"
57#include "llvm/ADT/SmallVector.h"
58#include "llvm/ADT/StringSwitch.h"
59#include "llvm/ADT/StringRef.h"
60#include "llvm/ADT/Triple.h"
61#include "llvm/Support/Casting.h"
62#include "llvm/Support/ErrorHandling.h"
63#include "llvm/Support/raw_ostream.h"
64#include <algorithm>
65#include <cassert>
66#include <cstddef>
67#include <cstring>
68#include <memory>
69#include <string>
70#include <tuple>
71#include <type_traits>
72
73using namespace clang;
74
75Decl *clang::getPrimaryMergedDecl(Decl *D) {
76 return D->getASTContext().getPrimaryMergedDecl(D);
77}
78
79// Defined here so that it can be inlined into its direct callers.
80bool Decl::isOutOfLine() const {
81 return !getLexicalDeclContext()->Equals(getDeclContext());
82}
83
84TranslationUnitDecl::TranslationUnitDecl(ASTContext &ctx)
85 : Decl(TranslationUnit, nullptr, SourceLocation()),
86 DeclContext(TranslationUnit), Ctx(ctx) {}
87
88//===----------------------------------------------------------------------===//
89// NamedDecl Implementation
90//===----------------------------------------------------------------------===//
91
92// Visibility rules aren't rigorously externally specified, but here
93// are the basic principles behind what we implement:
94//
95// 1. An explicit visibility attribute is generally a direct expression
96// of the user's intent and should be honored. Only the innermost
97// visibility attribute applies. If no visibility attribute applies,
98// global visibility settings are considered.
99//
100// 2. There is one caveat to the above: on or in a template pattern,
101// an explicit visibility attribute is just a default rule, and
102// visibility can be decreased by the visibility of template
103// arguments. But this, too, has an exception: an attribute on an
104// explicit specialization or instantiation causes all the visibility
105// restrictions of the template arguments to be ignored.
106//
107// 3. A variable that does not otherwise have explicit visibility can
108// be restricted by the visibility of its type.
109//
110// 4. A visibility restriction is explicit if it comes from an
111// attribute (or something like it), not a global visibility setting.
112// When emitting a reference to an external symbol, visibility
113// restrictions are ignored unless they are explicit.
114//
115// 5. When computing the visibility of a non-type, including a
116// non-type member of a class, only non-type visibility restrictions
117// are considered: the 'visibility' attribute, global value-visibility
118// settings, and a few special cases like __private_extern.
119//
120// 6. When computing the visibility of a type, including a type member
121// of a class, only type visibility restrictions are considered:
122// the 'type_visibility' attribute and global type-visibility settings.
123// However, a 'visibility' attribute counts as a 'type_visibility'
124// attribute on any declaration that only has the former.
125//
126// The visibility of a "secondary" entity, like a template argument,
127// is computed using the kind of that entity, not the kind of the
128// primary entity for which we are computing visibility. For example,
129// the visibility of a specialization of either of these templates:
130// template <class T, bool (&compare)(T, X)> bool has_match(list<T>, X);
131// template <class T, bool (&compare)(T, X)> class matcher;
132// is restricted according to the type visibility of the argument 'T',
133// the type visibility of 'bool(&)(T,X)', and the value visibility of
134// the argument function 'compare'. That 'has_match' is a value
135// and 'matcher' is a type only matters when looking for attributes
136// and settings from the immediate context.
137
138/// Does this computation kind permit us to consider additional
139/// visibility settings from attributes and the like?
140static bool hasExplicitVisibilityAlready(LVComputationKind computation) {
141 return computation.IgnoreExplicitVisibility;
142}
143
144/// Given an LVComputationKind, return one of the same type/value sort
145/// that records that it already has explicit visibility.
146static LVComputationKind
147withExplicitVisibilityAlready(LVComputationKind Kind) {
148 Kind.IgnoreExplicitVisibility = true;
149 return Kind;
150}
151
152static Optional<Visibility> getExplicitVisibility(const NamedDecl *D,
153 LVComputationKind kind) {
154 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 155, __extension__ __PRETTY_FUNCTION__))
155 "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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 155, __extension__ __PRETTY_FUNCTION__))
;
156 return D->getExplicitVisibility(kind.getExplicitVisibilityKind());
157}
158
159/// Is the given declaration a "type" or a "value" for the purposes of
160/// visibility computation?
161static bool usesTypeVisibility(const NamedDecl *D) {
162 return isa<TypeDecl>(D) ||
163 isa<ClassTemplateDecl>(D) ||
164 isa<ObjCInterfaceDecl>(D);
165}
166
167/// Does the given declaration have member specialization information,
168/// and if so, is it an explicit specialization?
169template <class T> static typename
170std::enable_if<!std::is_base_of<RedeclarableTemplateDecl, T>::value, bool>::type
171isExplicitMemberSpecialization(const T *D) {
172 if (const MemberSpecializationInfo *member =
173 D->getMemberSpecializationInfo()) {
174 return member->isExplicitSpecialization();
175 }
176 return false;
177}
178
179/// For templates, this question is easier: a member template can't be
180/// explicitly instantiated, so there's a single bit indicating whether
181/// or not this is an explicit member specialization.
182static bool isExplicitMemberSpecialization(const RedeclarableTemplateDecl *D) {
183 return D->isMemberSpecialization();
184}
185
186/// Given a visibility attribute, return the explicit visibility
187/// associated with it.
188template <class T>
189static Visibility getVisibilityFromAttr(const T *attr) {
190 switch (attr->getVisibility()) {
191 case T::Default:
192 return DefaultVisibility;
193 case T::Hidden:
194 return HiddenVisibility;
195 case T::Protected:
196 return ProtectedVisibility;
197 }
198 llvm_unreachable("bad visibility kind")::llvm::llvm_unreachable_internal("bad visibility kind", "/build/llvm-toolchain-snapshot-7~svn325118/tools/clang/lib/AST/Decl.cpp"
, 198)
;
199}
200
201/// Return the explicit visibility of the given declaration.
202static Optional<Visibility> getVisibilityOf(const NamedDecl *D,
203 NamedDecl::ExplicitVisibilityKind kind) {
204 // If we're ultimately computing the visibility of a type, look for
205 // a 'type_visibility' attribute before looking for 'visibility'.
206 if (kind == NamedDecl::VisibilityForType) {
207 if (const auto *A = D->getAttr<TypeVisibilityAttr>()) {
208 return getVisibilityFromAttr(A);
209 }
210 }
211
212 // If this declaration has an explicit visibility attribute, use it.
213 if (const auto *A = D->getAttr<VisibilityAttr>()) {
214 return getVisibilityFromAttr(A);
215 }
216
217 return None;
218}
219
220LinkageInfo LinkageComputer::getLVForType(const Type &T,
221 LVComputationKind computation) {
222 if (computation.IgnoreAllVisibility)
223 return LinkageInfo(T.getLinkage(), DefaultVisibility, true);
224 return getTypeLinkageAndVisibility(&T);
225}
226
227/// \brief Get the most restrictive linkage for the types in the given
228/// template parameter list. For visibility purposes, template
229/// parameters are part of the signature of a template.
230LinkageInfo LinkageComputer::getLVForTemplateParameterList(
231 const TemplateParameterList *Params, LVComputationKind computation) {
232 LinkageInfo LV;
233 for (const NamedDecl *P : *Params) {
234 // Template type parameters are the most common and never
235 // contribute to visibility, pack or not.
236 if (isa<TemplateTypeParmDecl>(P))
237 continue;
238
239 // Non-type template parameters can be restricted by the value type, e.g.
240 // template <enum X> class A { ... };
241 // We have to be careful here, though, because we can be dealing with
242 // dependent types.
243 if (const auto *NTTP = dyn_cast<NonTypeTemplateParmDecl>(P)) {
244 // Handle the non-pack case first.
245 if (!NTTP->isExpandedParameterPack()) {
246 if (!NTTP->getType()->isDependentType()) {
247 LV.merge(getLVForType(*NTTP->getType(), computation));
248 }
249 continue;
250 }
251
252 // Look at all the types in an expanded pack.
253 for (unsigned i = 0, n = NTTP->getNumExpansionTypes(); i != n; ++i) {
254 QualType type = NTTP->getExpansionType(i);
255 if (!type->isDependentType())
256 LV.merge(getTypeLinkageAndVisibility(type));
257 }
258 continue;
259 }
260
261 // Template template parameters can be restricted by their
262 // template parameters, recursively.
263 const auto *TTP = cast<TemplateTemplateParmDecl>(P);
264
265 // Handle the non-pack case first.
266 if (!TTP->isExpandedParameterPack()) {
267 LV.merge(getLVForTemplateParameterList(TTP->getTemplateParameters(),
268 computation));
269 continue;
270 }
271
272 // Look at all expansions in an expanded pack.
273 for (unsigned i = 0, n = TTP->getNumExpansionTemplateParameters();
274 i != n; ++i) {
275 LV.merge(getLVForTemplateParameterList(
276 TTP->getExpansionTemplateParameters(i), computation));
277 }
278 }
279
280 return LV;
281}
282
283static const Decl *getOutermostFuncOrBlockContext(const Decl *D) {
284 const Decl *Ret = nullptr;
285 const DeclContext *DC = D->getDeclContext();
286 while (DC->getDeclKind() != Decl::TranslationUnit) {
287 if (isa<FunctionDecl>(DC) || isa<BlockDecl>(DC))
288 Ret = cast<Decl>(DC);
289 DC = DC->getParent();
290 }
291 return Ret;
292}
293
294/// \brief Get the most restrictive linkage for the types and
295/// declarations in the given template argument list.
296///
297/// Note that we don't take an LVComputationKind because we always
298/// want to honor the visibility of template arguments in the same way.
299LinkageInfo
300LinkageComputer::getLVForTemplateArgumentList(ArrayRef<TemplateArgument> Args,
301 LVComputationKind computation) {
302 LinkageInfo LV;
303
304 for (const TemplateArgument &Arg : Args) {
305 switch (Arg.getKind()) {
306 case TemplateArgument::Null:
307 case TemplateArgument::Integral:
308 case TemplateArgument::Expression:
309 continue;
310
311 case TemplateArgument::Type:
312 LV.merge(getLVForType(*Arg.getAsType(), computation));
313 continue;
314
315 case TemplateArgument::Declaration:
316 if (const auto *ND = dyn_cast<NamedDecl>(Arg.getAsDecl())) {
317 assert(!usesTypeVisibility(ND))(static_cast <bool> (!usesTypeVisibility(ND)) ? void (0
) : __assert_fail ("!usesTypeVisibility(ND)", "/build/llvm-toolchain-snapshot-7~svn325118/tools/clang/lib/AST/Decl.cpp"
, 317, __extension__ __PRETTY_FUNCTION__))
;
318 LV.merge(getLVForDecl(ND, computation));
319 }
320 continue;
321
322 case TemplateArgument::NullPtr:
323 LV.merge(getTypeLinkageAndVisibility(Arg.getNullPtrType()));
324 continue;
325
326 case TemplateArgument::Template:
327 case TemplateArgument::TemplateExpansion:
328 if (TemplateDecl *Template =
329 Arg.getAsTemplateOrTemplatePattern().getAsTemplateDecl())
330 LV.merge(getLVForDecl(Template, computation));
331 continue;
332
333 case TemplateArgument::Pack:
334 LV.merge(getLVForTemplateArgumentList(Arg.getPackAsArray(), computation));
335 continue;
336 }
337 llvm_unreachable("bad template argument kind")::llvm::llvm_unreachable_internal("bad template argument kind"
, "/build/llvm-toolchain-snapshot-7~svn325118/tools/clang/lib/AST/Decl.cpp"
, 337)
;
338 }
339
340 return LV;
341}
342
343LinkageInfo
344LinkageComputer::getLVForTemplateArgumentList(const TemplateArgumentList &TArgs,
345 LVComputationKind computation) {
346 return getLVForTemplateArgumentList(TArgs.asArray(), computation);
347}
348
349static bool shouldConsiderTemplateVisibility(const FunctionDecl *fn,
350 const FunctionTemplateSpecializationInfo *specInfo) {
351 // Include visibility from the template parameters and arguments
352 // only if this is not an explicit instantiation or specialization
353 // with direct explicit visibility. (Implicit instantiations won't
354 // have a direct attribute.)
355 if (!specInfo->isExplicitInstantiationOrSpecialization())
356 return true;
357
358 return !fn->hasAttr<VisibilityAttr>();
359}
360
361/// Merge in template-related linkage and visibility for the given
362/// function template specialization.
363///
364/// We don't need a computation kind here because we can assume
365/// LVForValue.
366///
367/// \param[out] LV the computation to use for the parent
368void LinkageComputer::mergeTemplateLV(
369 LinkageInfo &LV, const FunctionDecl *fn,
370 const FunctionTemplateSpecializationInfo *specInfo,
371 LVComputationKind computation) {
372 bool considerVisibility =
373 shouldConsiderTemplateVisibility(fn, specInfo);
374
375 // Merge information from the template parameters.
376 FunctionTemplateDecl *temp = specInfo->getTemplate();
377 LinkageInfo tempLV =
378 getLVForTemplateParameterList(temp->getTemplateParameters(), computation);
379 LV.mergeMaybeWithVisibility(tempLV, considerVisibility);
380
381 // Merge information from the template arguments.
382 const TemplateArgumentList &templateArgs = *specInfo->TemplateArguments;
383 LinkageInfo argsLV = getLVForTemplateArgumentList(templateArgs, computation);
384 LV.mergeMaybeWithVisibility(argsLV, considerVisibility);
385}
386
387/// Does the given declaration have a direct visibility attribute
388/// that would match the given rules?
389static bool hasDirectVisibilityAttribute(const NamedDecl *D,
390 LVComputationKind computation) {
391 if (computation.IgnoreAllVisibility)
392 return false;
393
394 return (computation.isTypeVisibility() && D->hasAttr<TypeVisibilityAttr>()) ||
395 D->hasAttr<VisibilityAttr>();
396}
397
398/// Should we consider visibility associated with the template
399/// arguments and parameters of the given class template specialization?
400static bool shouldConsiderTemplateVisibility(
401 const ClassTemplateSpecializationDecl *spec,
402 LVComputationKind computation) {
403 // Include visibility from the template parameters and arguments
404 // only if this is not an explicit instantiation or specialization
405 // with direct explicit visibility (and note that implicit
406 // instantiations won't have a direct attribute).
407 //
408 // Furthermore, we want to ignore template parameters and arguments
409 // for an explicit specialization when computing the visibility of a
410 // member thereof with explicit visibility.
411 //
412 // This is a bit complex; let's unpack it.
413 //
414 // An explicit class specialization is an independent, top-level
415 // declaration. As such, if it or any of its members has an
416 // explicit visibility attribute, that must directly express the
417 // user's intent, and we should honor it. The same logic applies to
418 // an explicit instantiation of a member of such a thing.
419
420 // Fast path: if this is not an explicit instantiation or
421 // specialization, we always want to consider template-related
422 // visibility restrictions.
423 if (!spec->isExplicitInstantiationOrSpecialization())
424 return true;
425
426 // This is the 'member thereof' check.
427 if (spec->isExplicitSpecialization() &&
428 hasExplicitVisibilityAlready(computation))
429 return false;
430
431 return !hasDirectVisibilityAttribute(spec, computation);
432}
433
434/// Merge in template-related linkage and visibility for the given
435/// class template specialization.
436void LinkageComputer::mergeTemplateLV(
437 LinkageInfo &LV, const ClassTemplateSpecializationDecl *spec,
438 LVComputationKind computation) {
439 bool considerVisibility = shouldConsiderTemplateVisibility(spec, computation);
440
441 // Merge information from the template parameters, but ignore
442 // visibility if we're only considering template arguments.
443
444 ClassTemplateDecl *temp = spec->getSpecializedTemplate();
445 LinkageInfo tempLV =
446 getLVForTemplateParameterList(temp->getTemplateParameters(), computation);
447 LV.mergeMaybeWithVisibility(tempLV,
448 considerVisibility && !hasExplicitVisibilityAlready(computation));
449
450 // Merge information from the template arguments. We ignore
451 // template-argument visibility if we've got an explicit
452 // instantiation with a visibility attribute.
453 const TemplateArgumentList &templateArgs = spec->getTemplateArgs();
454 LinkageInfo argsLV = getLVForTemplateArgumentList(templateArgs, computation);
455 if (considerVisibility)
456 LV.mergeVisibility(argsLV);
457 LV.mergeExternalVisibility(argsLV);
458}
459
460/// Should we consider visibility associated with the template
461/// arguments and parameters of the given variable template
462/// specialization? As usual, follow class template specialization
463/// logic up to initialization.
464static bool shouldConsiderTemplateVisibility(
465 const VarTemplateSpecializationDecl *spec,
466 LVComputationKind computation) {
467 // Include visibility from the template parameters and arguments
468 // only if this is not an explicit instantiation or specialization
469 // with direct explicit visibility (and note that implicit
470 // instantiations won't have a direct attribute).
471 if (!spec->isExplicitInstantiationOrSpecialization())
472 return true;
473
474 // An explicit variable specialization is an independent, top-level
475 // declaration. As such, if it has an explicit visibility attribute,
476 // that must directly express the user's intent, and we should honor
477 // it.
478 if (spec->isExplicitSpecialization() &&
479 hasExplicitVisibilityAlready(computation))
480 return false;
481
482 return !hasDirectVisibilityAttribute(spec, computation);
483}
484
485/// Merge in template-related linkage and visibility for the given
486/// variable template specialization. As usual, follow class template
487/// specialization logic up to initialization.
488void LinkageComputer::mergeTemplateLV(LinkageInfo &LV,
489 const VarTemplateSpecializationDecl *spec,
490 LVComputationKind computation) {
491 bool considerVisibility = shouldConsiderTemplateVisibility(spec, computation);
492
493 // Merge information from the template parameters, but ignore
494 // visibility if we're only considering template arguments.
495
496 VarTemplateDecl *temp = spec->getSpecializedTemplate();
497 LinkageInfo tempLV =
498 getLVForTemplateParameterList(temp->getTemplateParameters(), computation);
499 LV.mergeMaybeWithVisibility(tempLV,
500 considerVisibility && !hasExplicitVisibilityAlready(computation));
501
502 // Merge information from the template arguments. We ignore
503 // template-argument visibility if we've got an explicit
504 // instantiation with a visibility attribute.
505 const TemplateArgumentList &templateArgs = spec->getTemplateArgs();
506 LinkageInfo argsLV = getLVForTemplateArgumentList(templateArgs, computation);
507 if (considerVisibility)
508 LV.mergeVisibility(argsLV);
509 LV.mergeExternalVisibility(argsLV);
510}
511
512static bool useInlineVisibilityHidden(const NamedDecl *D) {
513 // FIXME: we should warn if -fvisibility-inlines-hidden is used with c.
514 const LangOptions &Opts = D->getASTContext().getLangOpts();
515 if (!Opts.CPlusPlus || !Opts.InlineVisibilityHidden)
516 return false;
517
518 const auto *FD = dyn_cast<FunctionDecl>(D);
519 if (!FD)
520 return false;
521
522 TemplateSpecializationKind TSK = TSK_Undeclared;
523 if (FunctionTemplateSpecializationInfo *spec
524 = FD->getTemplateSpecializationInfo()) {
525 TSK = spec->getTemplateSpecializationKind();
526 } else if (MemberSpecializationInfo *MSI =
527 FD->getMemberSpecializationInfo()) {
528 TSK = MSI->getTemplateSpecializationKind();
529 }
530
531 const FunctionDecl *Def = nullptr;
532 // InlineVisibilityHidden only applies to definitions, and
533 // isInlined() only gives meaningful answers on definitions
534 // anyway.
535 return TSK != TSK_ExplicitInstantiationDeclaration &&
536 TSK != TSK_ExplicitInstantiationDefinition &&
537 FD->hasBody(Def) && Def->isInlined() && !Def->hasAttr<GNUInlineAttr>();
538}
539
540template <typename T> static bool isFirstInExternCContext(T *D) {
541 const T *First = D->getFirstDecl();
542 return First->isInExternCContext();
543}
544
545static bool isSingleLineLanguageLinkage(const Decl &D) {
546 if (const auto *SD = dyn_cast<LinkageSpecDecl>(D.getDeclContext()))
547 if (!SD->hasBraces())
548 return true;
549 return false;
550}
551
552static bool isExportedFromModuleIntefaceUnit(const NamedDecl *D) {
553 // FIXME: Handle isModulePrivate.
554 switch (D->getModuleOwnershipKind()) {
555 case Decl::ModuleOwnershipKind::Unowned:
556 case Decl::ModuleOwnershipKind::ModulePrivate:
557 return false;
558 case Decl::ModuleOwnershipKind::Visible:
559 case Decl::ModuleOwnershipKind::VisibleWhenImported:
560 if (auto *M = D->getOwningModule())
561 return M->Kind == Module::ModuleInterfaceUnit;
562 }
563 llvm_unreachable("unexpected module ownership kind")::llvm::llvm_unreachable_internal("unexpected module ownership kind"
, "/build/llvm-toolchain-snapshot-7~svn325118/tools/clang/lib/AST/Decl.cpp"
, 563)
;
564}
565
566static LinkageInfo getInternalLinkageFor(const NamedDecl *D) {
567 // Internal linkage declarations within a module interface unit are modeled
568 // as "module-internal linkage", which means that they have internal linkage
569 // formally but can be indirectly accessed from outside the module via inline
570 // functions and templates defined within the module.
571 if (auto *M = D->getOwningModule())
572 if (M->Kind == Module::ModuleInterfaceUnit)
573 return LinkageInfo(ModuleInternalLinkage, DefaultVisibility, false);
574
575 return LinkageInfo::internal();
576}
577
578static LinkageInfo getExternalLinkageFor(const NamedDecl *D) {
579 // C++ Modules TS [basic.link]/6.8:
580 // - A name declared at namespace scope that does not have internal linkage
581 // by the previous rules and that is introduced by a non-exported
582 // declaration has module linkage.
583 if (auto *M = D->getOwningModule())
584 if (M->Kind == Module::ModuleInterfaceUnit)
585 if (!isExportedFromModuleIntefaceUnit(
586 cast<NamedDecl>(D->getCanonicalDecl())))
587 return LinkageInfo(ModuleLinkage, DefaultVisibility, false);
588
589 return LinkageInfo::external();
590}
591
592LinkageInfo
593LinkageComputer::getLVForNamespaceScopeDecl(const NamedDecl *D,
594 LVComputationKind computation,
595 bool IgnoreVarTypeLinkage) {
596 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 597, __extension__ __PRETTY_FUNCTION__))
597 "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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 597, __extension__ __PRETTY_FUNCTION__))
;
598 ASTContext &Context = D->getASTContext();
599
600 // C++ [basic.link]p3:
601 // A name having namespace scope (3.3.6) has internal linkage if it
602 // is the name of
603 // - an object, reference, function or function template that is
604 // explicitly declared static; or,
605 // (This bullet corresponds to C99 6.2.2p3.)
606 if (const auto *Var = dyn_cast<VarDecl>(D)) {
607 // Explicitly declared static.
608 if (Var->getStorageClass() == SC_Static)
609 return getInternalLinkageFor(Var);
610
611 // - a non-inline, non-volatile object or reference that is explicitly
612 // declared const or constexpr and neither explicitly declared extern
613 // nor previously declared to have external linkage; or (there is no
614 // equivalent in C99)
615 // The C++ modules TS adds "non-exported" to this list.
616 if (Context.getLangOpts().CPlusPlus &&
617 Var->getType().isConstQualified() &&
618 !Var->getType().isVolatileQualified() &&
619 !Var->isInline() &&
620 !isExportedFromModuleIntefaceUnit(Var)) {
621 const VarDecl *PrevVar = Var->getPreviousDecl();
622 if (PrevVar)
623 return getLVForDecl(PrevVar, computation);
624
625 if (Var->getStorageClass() != SC_Extern &&
626 Var->getStorageClass() != SC_PrivateExtern &&
627 !isSingleLineLanguageLinkage(*Var))
628 return getInternalLinkageFor(Var);
629 }
630
631 for (const VarDecl *PrevVar = Var->getPreviousDecl(); PrevVar;
632 PrevVar = PrevVar->getPreviousDecl()) {
633 if (PrevVar->getStorageClass() == SC_PrivateExtern &&
634 Var->getStorageClass() == SC_None)
635 return getDeclLinkageAndVisibility(PrevVar);
636 // Explicitly declared static.
637 if (PrevVar->getStorageClass() == SC_Static)
638 return getInternalLinkageFor(Var);
639 }
640 } else if (const FunctionDecl *Function = D->getAsFunction()) {
641 // C++ [temp]p4:
642 // A non-member function template can have internal linkage; any
643 // other template name shall have external linkage.
644
645 // Explicitly declared static.
646 if (Function->getCanonicalDecl()->getStorageClass() == SC_Static)
647 return getInternalLinkageFor(Function);
648 } else if (const auto *IFD = dyn_cast<IndirectFieldDecl>(D)) {
649 // - a data member of an anonymous union.
650 const VarDecl *VD = IFD->getVarDecl();
651 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 651, __extension__ __PRETTY_FUNCTION__))
;
652 return getLVForNamespaceScopeDecl(VD, computation, IgnoreVarTypeLinkage);
653 }
654 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 654, __extension__ __PRETTY_FUNCTION__))
;
655
656 if (D->isInAnonymousNamespace()) {
657 const auto *Var = dyn_cast<VarDecl>(D);
658 const auto *Func = dyn_cast<FunctionDecl>(D);
659 // FIXME: The check for extern "C" here is not justified by the standard
660 // wording, but we retain it from the pre-DR1113 model to avoid breaking
661 // code.
662 //
663 // C++11 [basic.link]p4:
664 // An unnamed namespace or a namespace declared directly or indirectly
665 // within an unnamed namespace has internal linkage.
666 if ((!Var || !isFirstInExternCContext(Var)) &&
667 (!Func || !isFirstInExternCContext(Func)))
668 return getInternalLinkageFor(D);
669 }
670
671 // Set up the defaults.
672
673 // C99 6.2.2p5:
674 // If the declaration of an identifier for an object has file
675 // scope and no storage-class specifier, its linkage is
676 // external.
677 LinkageInfo LV = getExternalLinkageFor(D);
678
679 if (!hasExplicitVisibilityAlready(computation)) {
680 if (Optional<Visibility> Vis = getExplicitVisibility(D, computation)) {
681 LV.mergeVisibility(*Vis, true);
682 } else {
683 // If we're declared in a namespace with a visibility attribute,
684 // use that namespace's visibility, and it still counts as explicit.
685 for (const DeclContext *DC = D->getDeclContext();
686 !isa<TranslationUnitDecl>(DC);
687 DC = DC->getParent()) {
688 const auto *ND = dyn_cast<NamespaceDecl>(DC);
689 if (!ND) continue;
690 if (Optional<Visibility> Vis = getExplicitVisibility(ND, computation)) {
691 LV.mergeVisibility(*Vis, true);
692 break;
693 }
694 }
695 }
696
697 // Add in global settings if the above didn't give us direct visibility.
698 if (!LV.isVisibilityExplicit()) {
699 // Use global type/value visibility as appropriate.
700 Visibility globalVisibility =
701 computation.isValueVisibility()
702 ? Context.getLangOpts().getValueVisibilityMode()
703 : Context.getLangOpts().getTypeVisibilityMode();
704 LV.mergeVisibility(globalVisibility, /*explicit*/ false);
705
706 // If we're paying attention to global visibility, apply
707 // -finline-visibility-hidden if this is an inline method.
708 if (useInlineVisibilityHidden(D))
709 LV.mergeVisibility(HiddenVisibility, true);
710 }
711 }
712
713 // C++ [basic.link]p4:
714
715 // A name having namespace scope has external linkage if it is the
716 // name of
717 //
718 // - an object or reference, unless it has internal linkage; or
719 if (const auto *Var = dyn_cast<VarDecl>(D)) {
720 // GCC applies the following optimization to variables and static
721 // data members, but not to functions:
722 //
723 // Modify the variable's LV by the LV of its type unless this is
724 // C or extern "C". This follows from [basic.link]p9:
725 // A type without linkage shall not be used as the type of a
726 // variable or function with external linkage unless
727 // - the entity has C language linkage, or
728 // - the entity is declared within an unnamed namespace, or
729 // - the entity is not used or is defined in the same
730 // translation unit.
731 // and [basic.link]p10:
732 // ...the types specified by all declarations referring to a
733 // given variable or function shall be identical...
734 // C does not have an equivalent rule.
735 //
736 // Ignore this if we've got an explicit attribute; the user
737 // probably knows what they're doing.
738 //
739 // Note that we don't want to make the variable non-external
740 // because of this, but unique-external linkage suits us.
741 if (Context.getLangOpts().CPlusPlus && !isFirstInExternCContext(Var) &&
742 !IgnoreVarTypeLinkage) {
743 LinkageInfo TypeLV = getLVForType(*Var->getType(), computation);
744 if (!isExternallyVisible(TypeLV.getLinkage()))
745 return LinkageInfo::uniqueExternal();
746 if (!LV.isVisibilityExplicit())
747 LV.mergeVisibility(TypeLV);
748 }
749
750 if (Var->getStorageClass() == SC_PrivateExtern)
751 LV.mergeVisibility(HiddenVisibility, true);
752
753 // Note that Sema::MergeVarDecl already takes care of implementing
754 // C99 6.2.2p4 and propagating the visibility attribute, so we don't have
755 // to do it here.
756
757 // As per function and class template specializations (below),
758 // consider LV for the template and template arguments. We're at file
759 // scope, so we do not need to worry about nested specializations.
760 if (const auto *spec = dyn_cast<VarTemplateSpecializationDecl>(Var)) {
761 mergeTemplateLV(LV, spec, computation);
762 }
763
764 // - a function, unless it has internal linkage; or
765 } else if (const auto *Function = dyn_cast<FunctionDecl>(D)) {
766 // In theory, we can modify the function's LV by the LV of its
767 // type unless it has C linkage (see comment above about variables
768 // for justification). In practice, GCC doesn't do this, so it's
769 // just too painful to make work.
770
771 if (Function->getStorageClass() == SC_PrivateExtern)
772 LV.mergeVisibility(HiddenVisibility, true);
773
774 // Note that Sema::MergeCompatibleFunctionDecls already takes care of
775 // merging storage classes and visibility attributes, so we don't have to
776 // look at previous decls in here.
777
778 // In C++, then if the type of the function uses a type with
779 // unique-external linkage, it's not legally usable from outside
780 // this translation unit. However, we should use the C linkage
781 // rules instead for extern "C" declarations.
782 if (Context.getLangOpts().CPlusPlus && !isFirstInExternCContext(Function)) {
783 // Only look at the type-as-written. Otherwise, deducing the return type
784 // of a function could change its linkage.
785 QualType TypeAsWritten = Function->getType();
786 if (TypeSourceInfo *TSI = Function->getTypeSourceInfo())
787 TypeAsWritten = TSI->getType();
788 if (!isExternallyVisible(TypeAsWritten->getLinkage()))
789 return LinkageInfo::uniqueExternal();
790 }
791
792 // Consider LV from the template and the template arguments.
793 // We're at file scope, so we do not need to worry about nested
794 // specializations.
795 if (FunctionTemplateSpecializationInfo *specInfo
796 = Function->getTemplateSpecializationInfo()) {
797 mergeTemplateLV(LV, Function, specInfo, computation);
798 }
799
800 // - a named class (Clause 9), or an unnamed class defined in a
801 // typedef declaration in which the class has the typedef name
802 // for linkage purposes (7.1.3); or
803 // - a named enumeration (7.2), or an unnamed enumeration
804 // defined in a typedef declaration in which the enumeration
805 // has the typedef name for linkage purposes (7.1.3); or
806 } else if (const auto *Tag = dyn_cast<TagDecl>(D)) {
807 // Unnamed tags have no linkage.
808 if (!Tag->hasNameForLinkage())
809 return LinkageInfo::none();
810
811 // If this is a class template specialization, consider the
812 // linkage of the template and template arguments. We're at file
813 // scope, so we do not need to worry about nested specializations.
814 if (const auto *spec = dyn_cast<ClassTemplateSpecializationDecl>(Tag)) {
815 mergeTemplateLV(LV, spec, computation);
816 }
817
818 // - an enumerator belonging to an enumeration with external linkage;
819 } else if (isa<EnumConstantDecl>(D)) {
820 LinkageInfo EnumLV = getLVForDecl(cast<NamedDecl>(D->getDeclContext()),
821 computation);
822 if (!isExternalFormalLinkage(EnumLV.getLinkage()))
823 return LinkageInfo::none();
824 LV.merge(EnumLV);
825
826 // - a template, unless it is a function template that has
827 // internal linkage (Clause 14);
828 } else if (const auto *temp = dyn_cast<TemplateDecl>(D)) {
829 bool considerVisibility = !hasExplicitVisibilityAlready(computation);
830 LinkageInfo tempLV =
831 getLVForTemplateParameterList(temp->getTemplateParameters(), computation);
832 LV.mergeMaybeWithVisibility(tempLV, considerVisibility);
833
834 // - a namespace (7.3), unless it is declared within an unnamed
835 // namespace.
836 //
837 // We handled names in anonymous namespaces above.
838 } else if (isa<NamespaceDecl>(D)) {
839 return LV;
840
841 // By extension, we assign external linkage to Objective-C
842 // interfaces.
843 } else if (isa<ObjCInterfaceDecl>(D)) {
844 // fallout
845
846 } else if (auto *TD = dyn_cast<TypedefNameDecl>(D)) {
847 // A typedef declaration has linkage if it gives a type a name for
848 // linkage purposes.
849 if (!TD->getAnonDeclWithTypedefName(/*AnyRedecl*/true))
850 return LinkageInfo::none();
851
852 // Everything not covered here has no linkage.
853 } else {
854 return LinkageInfo::none();
855 }
856
857 // If we ended up with non-externally-visible linkage, visibility should
858 // always be default.
859 if (!isExternallyVisible(LV.getLinkage()))
860 return LinkageInfo(LV.getLinkage(), DefaultVisibility, false);
861
862 return LV;
863}
864
865LinkageInfo
866LinkageComputer::getLVForClassMember(const NamedDecl *D,
867 LVComputationKind computation,
868 bool IgnoreVarTypeLinkage) {
869 // Only certain class members have linkage. Note that fields don't
870 // really have linkage, but it's convenient to say they do for the
871 // purposes of calculating linkage of pointer-to-data-member
872 // template arguments.
873 //
874 // Templates also don't officially have linkage, but since we ignore
875 // the C++ standard and look at template arguments when determining
876 // linkage and visibility of a template specialization, we might hit
877 // a template template argument that way. If we do, we need to
878 // consider its linkage.
879 if (!(isa<CXXMethodDecl>(D) ||
880 isa<VarDecl>(D) ||
881 isa<FieldDecl>(D) ||
882 isa<IndirectFieldDecl>(D) ||
883 isa<TagDecl>(D) ||
884 isa<TemplateDecl>(D)))
885 return LinkageInfo::none();
886
887 LinkageInfo LV;
888
889 // If we have an explicit visibility attribute, merge that in.
890 if (!hasExplicitVisibilityAlready(computation)) {
891 if (Optional<Visibility> Vis = getExplicitVisibility(D, computation))
892 LV.mergeVisibility(*Vis, true);
893 // If we're paying attention to global visibility, apply
894 // -finline-visibility-hidden if this is an inline method.
895 //
896 // Note that we do this before merging information about
897 // the class visibility.
898 if (!LV.isVisibilityExplicit() && useInlineVisibilityHidden(D))
899 LV.mergeVisibility(HiddenVisibility, true);
900 }
901
902 // If this class member has an explicit visibility attribute, the only
903 // thing that can change its visibility is the template arguments, so
904 // only look for them when processing the class.
905 LVComputationKind classComputation = computation;
906 if (LV.isVisibilityExplicit())
907 classComputation = withExplicitVisibilityAlready(computation);
908
909 LinkageInfo classLV =
910 getLVForDecl(cast<RecordDecl>(D->getDeclContext()), classComputation);
911 // The member has the same linkage as the class. If that's not externally
912 // visible, we don't need to compute anything about the linkage.
913 // FIXME: If we're only computing linkage, can we bail out here?
914 if (!isExternallyVisible(classLV.getLinkage()))
915 return classLV;
916
917
918 // Otherwise, don't merge in classLV yet, because in certain cases
919 // we need to completely ignore the visibility from it.
920
921 // Specifically, if this decl exists and has an explicit attribute.
922 const NamedDecl *explicitSpecSuppressor = nullptr;
923
924 if (const auto *MD = dyn_cast<CXXMethodDecl>(D)) {
925 // Only look at the type-as-written. Otherwise, deducing the return type
926 // of a function could change its linkage.
927 QualType TypeAsWritten = MD->getType();
928 if (TypeSourceInfo *TSI = MD->getTypeSourceInfo())
929 TypeAsWritten = TSI->getType();
930 if (!isExternallyVisible(TypeAsWritten->getLinkage()))
931 return LinkageInfo::uniqueExternal();
932
933 // If this is a method template specialization, use the linkage for
934 // the template parameters and arguments.
935 if (FunctionTemplateSpecializationInfo *spec
936 = MD->getTemplateSpecializationInfo()) {
937 mergeTemplateLV(LV, MD, spec, computation);
938 if (spec->isExplicitSpecialization()) {
939 explicitSpecSuppressor = MD;
940 } else if (isExplicitMemberSpecialization(spec->getTemplate())) {
941 explicitSpecSuppressor = spec->getTemplate()->getTemplatedDecl();
942 }
943 } else if (isExplicitMemberSpecialization(MD)) {
944 explicitSpecSuppressor = MD;
945 }
946
947 } else if (const auto *RD = dyn_cast<CXXRecordDecl>(D)) {
948 if (const auto *spec = dyn_cast<ClassTemplateSpecializationDecl>(RD)) {
949 mergeTemplateLV(LV, spec, computation);
950 if (spec->isExplicitSpecialization()) {
951 explicitSpecSuppressor = spec;
952 } else {
953 const ClassTemplateDecl *temp = spec->getSpecializedTemplate();
954 if (isExplicitMemberSpecialization(temp)) {
955 explicitSpecSuppressor = temp->getTemplatedDecl();
956 }
957 }
958 } else if (isExplicitMemberSpecialization(RD)) {
959 explicitSpecSuppressor = RD;
960 }
961
962 // Static data members.
963 } else if (const auto *VD = dyn_cast<VarDecl>(D)) {
964 if (const auto *spec = dyn_cast<VarTemplateSpecializationDecl>(VD))
965 mergeTemplateLV(LV, spec, computation);
966
967 // Modify the variable's linkage by its type, but ignore the
968 // type's visibility unless it's a definition.
969 if (!IgnoreVarTypeLinkage) {
970 LinkageInfo typeLV = getLVForType(*VD->getType(), computation);
971 // FIXME: If the type's linkage is not externally visible, we can
972 // give this static data member UniqueExternalLinkage.
973 if (!LV.isVisibilityExplicit() && !classLV.isVisibilityExplicit())
974 LV.mergeVisibility(typeLV);
975 LV.mergeExternalVisibility(typeLV);
976 }
977
978 if (isExplicitMemberSpecialization(VD)) {
979 explicitSpecSuppressor = VD;
980 }
981
982 // Template members.
983 } else if (const auto *temp = dyn_cast<TemplateDecl>(D)) {
984 bool considerVisibility =
985 (!LV.isVisibilityExplicit() &&
986 !classLV.isVisibilityExplicit() &&
987 !hasExplicitVisibilityAlready(computation));
988 LinkageInfo tempLV =
989 getLVForTemplateParameterList(temp->getTemplateParameters(), computation);
990 LV.mergeMaybeWithVisibility(tempLV, considerVisibility);
991
992 if (const auto *redeclTemp = dyn_cast<RedeclarableTemplateDecl>(temp)) {
993 if (isExplicitMemberSpecialization(redeclTemp)) {
994 explicitSpecSuppressor = temp->getTemplatedDecl();
995 }
996 }
997 }
998
999 // We should never be looking for an attribute directly on a template.
1000 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 1000, __extension__ __PRETTY_FUNCTION__))
;
1001
1002 // If this member is an explicit member specialization, and it has
1003 // an explicit attribute, ignore visibility from the parent.
1004 bool considerClassVisibility = true;
1005 if (explicitSpecSuppressor &&
1006 // optimization: hasDVA() is true only with explicit visibility.
1007 LV.isVisibilityExplicit() &&
1008 classLV.getVisibility() != DefaultVisibility &&
1009 hasDirectVisibilityAttribute(explicitSpecSuppressor, computation)) {
1010 considerClassVisibility = false;
1011 }
1012
1013 // Finally, merge in information from the class.
1014 LV.mergeMaybeWithVisibility(classLV, considerClassVisibility);
1015 return LV;
1016}
1017
1018void NamedDecl::anchor() {}
1019
1020bool NamedDecl::isLinkageValid() const {
1021 if (!hasCachedLinkage())
1022 return true;
1023
1024 Linkage L = LinkageComputer{}
1025 .computeLVForDecl(this, LVComputationKind::forLinkageOnly())
1026 .getLinkage();
1027 return L == getCachedLinkage();
1028}
1029
1030ObjCStringFormatFamily NamedDecl::getObjCFStringFormattingFamily() const {
1031 StringRef name = getName();
1032 if (name.empty()) return SFF_None;
1033
1034 if (name.front() == 'C')
1035 if (name == "CFStringCreateWithFormat" ||
1036 name == "CFStringCreateWithFormatAndArguments" ||
1037 name == "CFStringAppendFormat" ||
1038 name == "CFStringAppendFormatAndArguments")
1039 return SFF_CFString;
1040 return SFF_None;
1041}
1042
1043Linkage NamedDecl::getLinkageInternal() const {
1044 // We don't care about visibility here, so ask for the cheapest
1045 // possible visibility analysis.
1046 return LinkageComputer{}
1047 .getLVForDecl(this, LVComputationKind::forLinkageOnly())
1048 .getLinkage();
1049}
1050
1051LinkageInfo NamedDecl::getLinkageAndVisibility() const {
1052 return LinkageComputer{}.getDeclLinkageAndVisibility(this);
1053}
1054
1055static Optional<Visibility>
1056getExplicitVisibilityAux(const NamedDecl *ND,
1057 NamedDecl::ExplicitVisibilityKind kind,
1058 bool IsMostRecent) {
1059 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 1059, __extension__ __PRETTY_FUNCTION__))
;
1060
1061 // Check the declaration itself first.
1062 if (Optional<Visibility> V = getVisibilityOf(ND, kind))
1063 return V;
1064
1065 // If this is a member class of a specialization of a class template
1066 // and the corresponding decl has explicit visibility, use that.
1067 if (const auto *RD = dyn_cast<CXXRecordDecl>(ND)) {
1068 CXXRecordDecl *InstantiatedFrom = RD->getInstantiatedFromMemberClass();
1069 if (InstantiatedFrom)
1070 return getVisibilityOf(InstantiatedFrom, kind);
1071 }
1072
1073 // If there wasn't explicit visibility there, and this is a
1074 // specialization of a class template, check for visibility
1075 // on the pattern.
1076 if (const auto *spec = dyn_cast<ClassTemplateSpecializationDecl>(ND))
1077 return getVisibilityOf(spec->getSpecializedTemplate()->getTemplatedDecl(),
1078 kind);
1079
1080 // Use the most recent declaration.
1081 if (!IsMostRecent && !isa<NamespaceDecl>(ND)) {
1082 const NamedDecl *MostRecent = ND->getMostRecentDecl();
1083 if (MostRecent != ND)
1084 return getExplicitVisibilityAux(MostRecent, kind, true);
1085 }
1086
1087 if (const auto *Var = dyn_cast<VarDecl>(ND)) {
1088 if (Var->isStaticDataMember()) {
1089 VarDecl *InstantiatedFrom = Var->getInstantiatedFromStaticDataMember();
1090 if (InstantiatedFrom)
1091 return getVisibilityOf(InstantiatedFrom, kind);
1092 }
1093
1094 if (const auto *VTSD = dyn_cast<VarTemplateSpecializationDecl>(Var))
1095 return getVisibilityOf(VTSD->getSpecializedTemplate()->getTemplatedDecl(),
1096 kind);
1097
1098 return None;
1099 }
1100 // Also handle function template specializations.
1101 if (const auto *fn = dyn_cast<FunctionDecl>(ND)) {
1102 // If the function is a specialization of a template with an
1103 // explicit visibility attribute, use that.
1104 if (FunctionTemplateSpecializationInfo *templateInfo
1105 = fn->getTemplateSpecializationInfo())
1106 return getVisibilityOf(templateInfo->getTemplate()->getTemplatedDecl(),
1107 kind);
1108
1109 // If the function is a member of a specialization of a class template
1110 // and the corresponding decl has explicit visibility, use that.
1111 FunctionDecl *InstantiatedFrom = fn->getInstantiatedFromMemberFunction();
1112 if (InstantiatedFrom)
1113 return getVisibilityOf(InstantiatedFrom, kind);
1114
1115 return None;
1116 }
1117
1118 // The visibility of a template is stored in the templated decl.
1119 if (const auto *TD = dyn_cast<TemplateDecl>(ND))
1120 return getVisibilityOf(TD->getTemplatedDecl(), kind);
1121
1122 return None;
1123}
1124
1125Optional<Visibility>
1126NamedDecl::getExplicitVisibility(ExplicitVisibilityKind kind) const {
1127 return getExplicitVisibilityAux(this, kind, false);
1128}
1129
1130LinkageInfo LinkageComputer::getLVForClosure(const DeclContext *DC,
1131 Decl *ContextDecl,
1132 LVComputationKind computation) {
1133 // This lambda has its linkage/visibility determined by its owner.
1134 const NamedDecl *Owner;
1135 if (!ContextDecl)
1136 Owner = dyn_cast<NamedDecl>(DC);
1137 else if (isa<ParmVarDecl>(ContextDecl))
1138 Owner =
1139 dyn_cast<NamedDecl>(ContextDecl->getDeclContext()->getRedeclContext());
1140 else
1141 Owner = cast<NamedDecl>(ContextDecl);
1142
1143 if (!Owner)
1144 return LinkageInfo::none();
1145
1146 // If the owner has a deduced type, we need to skip querying the linkage and
1147 // visibility of that type, because it might involve this closure type. The
1148 // only effect of this is that we might give a lambda VisibleNoLinkage rather
1149 // than NoLinkage when we don't strictly need to, which is benign.
1150 auto *VD = dyn_cast<VarDecl>(Owner);
1151 LinkageInfo OwnerLV =
1152 VD && VD->getType()->getContainedDeducedType()
1153 ? computeLVForDecl(Owner, computation, /*IgnoreVarTypeLinkage*/true)
1154 : getLVForDecl(Owner, computation);
1155
1156 // A lambda never formally has linkage. But if the owner is externally
1157 // visible, then the lambda is too. We apply the same rules to blocks.
1158 if (!isExternallyVisible(OwnerLV.getLinkage()))
1159 return LinkageInfo::none();
1160 return LinkageInfo(VisibleNoLinkage, OwnerLV.getVisibility(),
1161 OwnerLV.isVisibilityExplicit());
1162}
1163
1164LinkageInfo LinkageComputer::getLVForLocalDecl(const NamedDecl *D,
1165 LVComputationKind computation) {
1166 if (const auto *Function = dyn_cast<FunctionDecl>(D)) {
1167 if (Function->isInAnonymousNamespace() &&
1168 !isFirstInExternCContext(Function))
1169 return getInternalLinkageFor(Function);
1170
1171 // This is a "void f();" which got merged with a file static.
1172 if (Function->getCanonicalDecl()->getStorageClass() == SC_Static)
1173 return getInternalLinkageFor(Function);
1174
1175 LinkageInfo LV;
1176 if (!hasExplicitVisibilityAlready(computation)) {
1177 if (Optional<Visibility> Vis =
1178 getExplicitVisibility(Function, computation))
1179 LV.mergeVisibility(*Vis, true);
1180 }
1181
1182 // Note that Sema::MergeCompatibleFunctionDecls already takes care of
1183 // merging storage classes and visibility attributes, so we don't have to
1184 // look at previous decls in here.
1185
1186 return LV;
1187 }
1188
1189 if (const auto *Var = dyn_cast<VarDecl>(D)) {
1190 if (Var->hasExternalStorage()) {
1191 if (Var->isInAnonymousNamespace() && !isFirstInExternCContext(Var))
1192 return getInternalLinkageFor(Var);
1193
1194 LinkageInfo LV;
1195 if (Var->getStorageClass() == SC_PrivateExtern)
1196 LV.mergeVisibility(HiddenVisibility, true);
1197 else if (!hasExplicitVisibilityAlready(computation)) {
1198 if (Optional<Visibility> Vis = getExplicitVisibility(Var, computation))
1199 LV.mergeVisibility(*Vis, true);
1200 }
1201
1202 if (const VarDecl *Prev = Var->getPreviousDecl()) {
1203 LinkageInfo PrevLV = getLVForDecl(Prev, computation);
1204 if (PrevLV.getLinkage())
1205 LV.setLinkage(PrevLV.getLinkage());
1206 LV.mergeVisibility(PrevLV);
1207 }
1208
1209 return LV;
1210 }
1211
1212 if (!Var->isStaticLocal())
1213 return LinkageInfo::none();
1214 }
1215
1216 ASTContext &Context = D->getASTContext();
1217 if (!Context.getLangOpts().CPlusPlus)
1218 return LinkageInfo::none();
1219
1220 const Decl *OuterD = getOutermostFuncOrBlockContext(D);
1221 if (!OuterD || OuterD->isInvalidDecl())
1222 return LinkageInfo::none();
1223
1224 LinkageInfo LV;
1225 if (const auto *BD = dyn_cast<BlockDecl>(OuterD)) {
1226 if (!BD->getBlockManglingNumber())
1227 return LinkageInfo::none();
1228
1229 LV = getLVForClosure(BD->getDeclContext()->getRedeclContext(),
1230 BD->getBlockManglingContextDecl(), computation);
1231 } else {
1232 const auto *FD = cast<FunctionDecl>(OuterD);
1233 if (!FD->isInlined() &&
1234 !isTemplateInstantiation(FD->getTemplateSpecializationKind()))
1235 return LinkageInfo::none();
1236
1237 LV = getLVForDecl(FD, computation);
1238 }
1239 if (!isExternallyVisible(LV.getLinkage()))
1240 return LinkageInfo::none();
1241 return LinkageInfo(VisibleNoLinkage, LV.getVisibility(),
1242 LV.isVisibilityExplicit());
1243}
1244
1245static inline const CXXRecordDecl*
1246getOutermostEnclosingLambda(const CXXRecordDecl *Record) {
1247 const CXXRecordDecl *Ret = Record;
1248 while (Record && Record->isLambda()) {
1249 Ret = Record;
1250 if (!Record->getParent()) break;
1251 // Get the Containing Class of this Lambda Class
1252 Record = dyn_cast_or_null<CXXRecordDecl>(
1253 Record->getParent()->getParent());
1254 }
1255 return Ret;
1256}
1257
1258LinkageInfo LinkageComputer::computeLVForDecl(const NamedDecl *D,
1259 LVComputationKind computation,
1260 bool IgnoreVarTypeLinkage) {
1261 // Internal_linkage attribute overrides other considerations.
1262 if (D->hasAttr<InternalLinkageAttr>())
1263 return getInternalLinkageFor(D);
1264
1265 // Objective-C: treat all Objective-C declarations as having external
1266 // linkage.
1267 switch (D->getKind()) {
1268 default:
1269 break;
1270
1271 // Per C++ [basic.link]p2, only the names of objects, references,
1272 // functions, types, templates, namespaces, and values ever have linkage.
1273 //
1274 // Note that the name of a typedef, namespace alias, using declaration,
1275 // and so on are not the name of the corresponding type, namespace, or
1276 // declaration, so they do *not* have linkage.
1277 case Decl::ImplicitParam:
1278 case Decl::Label:
1279 case Decl::NamespaceAlias:
1280 case Decl::ParmVar:
1281 case Decl::Using:
1282 case Decl::UsingShadow:
1283 case Decl::UsingDirective:
1284 return LinkageInfo::none();
1285
1286 case Decl::EnumConstant:
1287 // C++ [basic.link]p4: an enumerator has the linkage of its enumeration.
1288 if (D->getASTContext().getLangOpts().CPlusPlus)
1289 return getLVForDecl(cast<EnumDecl>(D->getDeclContext()), computation);
1290 return LinkageInfo::visible_none();
1291
1292 case Decl::Typedef:
1293 case Decl::TypeAlias:
1294 // A typedef declaration has linkage if it gives a type a name for
1295 // linkage purposes.
1296 if (!cast<TypedefNameDecl>(D)
1297 ->getAnonDeclWithTypedefName(/*AnyRedecl*/true))
1298 return LinkageInfo::none();
1299 break;
1300
1301 case Decl::TemplateTemplateParm: // count these as external
1302 case Decl::NonTypeTemplateParm:
1303 case Decl::ObjCAtDefsField:
1304 case Decl::ObjCCategory:
1305 case Decl::ObjCCategoryImpl:
1306 case Decl::ObjCCompatibleAlias:
1307 case Decl::ObjCImplementation:
1308 case Decl::ObjCMethod:
1309 case Decl::ObjCProperty:
1310 case Decl::ObjCPropertyImpl:
1311 case Decl::ObjCProtocol:
1312 return getExternalLinkageFor(D);
1313
1314 case Decl::CXXRecord: {
1315 const auto *Record = cast<CXXRecordDecl>(D);
1316 if (Record->isLambda()) {
1317 if (!Record->getLambdaManglingNumber()) {
1318 // This lambda has no mangling number, so it's internal.
1319 return getInternalLinkageFor(D);
1320 }
1321
1322 // This lambda has its linkage/visibility determined:
1323 // - either by the outermost lambda if that lambda has no mangling
1324 // number.
1325 // - or by the parent of the outer most lambda
1326 // This prevents infinite recursion in settings such as nested lambdas
1327 // used in NSDMI's, for e.g.
1328 // struct L {
1329 // int t{};
1330 // int t2 = ([](int a) { return [](int b) { return b; };})(t)(t);
1331 // };
1332 const CXXRecordDecl *OuterMostLambda =
1333 getOutermostEnclosingLambda(Record);
1334 if (!OuterMostLambda->getLambdaManglingNumber())
1335 return getInternalLinkageFor(D);
1336
1337 return getLVForClosure(
1338 OuterMostLambda->getDeclContext()->getRedeclContext(),
1339 OuterMostLambda->getLambdaContextDecl(), computation);
1340 }
1341
1342 break;
1343 }
1344 }
1345
1346 // Handle linkage for namespace-scope names.
1347 if (D->getDeclContext()->getRedeclContext()->isFileContext())
1348 return getLVForNamespaceScopeDecl(D, computation, IgnoreVarTypeLinkage);
1349
1350 // C++ [basic.link]p5:
1351 // In addition, a member function, static data member, a named
1352 // class or enumeration of class scope, or an unnamed class or
1353 // enumeration defined in a class-scope typedef declaration such
1354 // that the class or enumeration has the typedef name for linkage
1355 // purposes (7.1.3), has external linkage if the name of the class
1356 // has external linkage.
1357 if (D->getDeclContext()->isRecord())
1358 return getLVForClassMember(D, computation, IgnoreVarTypeLinkage);
1359
1360 // C++ [basic.link]p6:
1361 // The name of a function declared in block scope and the name of
1362 // an object declared by a block scope extern declaration have
1363 // linkage. If there is a visible declaration of an entity with
1364 // linkage having the same name and type, ignoring entities
1365 // declared outside the innermost enclosing namespace scope, the
1366 // block scope declaration declares that same entity and receives
1367 // the linkage of the previous declaration. If there is more than
1368 // one such matching entity, the program is ill-formed. Otherwise,
1369 // if no matching entity is found, the block scope entity receives
1370 // external linkage.
1371 if (D->getDeclContext()->isFunctionOrMethod())
1372 return getLVForLocalDecl(D, computation);
1373
1374 // C++ [basic.link]p6:
1375 // Names not covered by these rules have no linkage.
1376 return LinkageInfo::none();
1377}
1378
1379/// getLVForDecl - Get the linkage and visibility for the given declaration.
1380LinkageInfo LinkageComputer::getLVForDecl(const NamedDecl *D,
1381 LVComputationKind computation) {
1382 // Internal_linkage attribute overrides other considerations.
1383 if (D->hasAttr<InternalLinkageAttr>())
1384 return getInternalLinkageFor(D);
1385
1386 if (computation.IgnoreAllVisibility && D->hasCachedLinkage())
1387 return LinkageInfo(D->getCachedLinkage(), DefaultVisibility, false);
1388
1389 if (llvm::Optional<LinkageInfo> LI = lookup(D, computation))
1390 return *LI;
1391
1392 LinkageInfo LV = computeLVForDecl(D, computation);
1393 if (D->hasCachedLinkage())
1394 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 1394, __extension__ __PRETTY_FUNCTION__))
;
1395
1396 D->setCachedLinkage(LV.getLinkage());
1397 cache(D, computation, LV);
1398
1399#ifndef NDEBUG
1400 // In C (because of gnu inline) and in c++ with microsoft extensions an
1401 // static can follow an extern, so we can have two decls with different
1402 // linkages.
1403 const LangOptions &Opts = D->getASTContext().getLangOpts();
1404 if (!Opts.CPlusPlus || Opts.MicrosoftExt)
1405 return LV;
1406
1407 // We have just computed the linkage for this decl. By induction we know
1408 // that all other computed linkages match, check that the one we just
1409 // computed also does.
1410 NamedDecl *Old = nullptr;
1411 for (auto I : D->redecls()) {
1412 auto *T = cast<NamedDecl>(I);
1413 if (T == D)
1414 continue;
1415 if (!T->isInvalidDecl() && T->hasCachedLinkage()) {
1416 Old = T;
1417 break;
1418 }
1419 }
1420 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 1420, __extension__ __PRETTY_FUNCTION__))
;
1421#endif
1422
1423 return LV;
1424}
1425
1426LinkageInfo LinkageComputer::getDeclLinkageAndVisibility(const NamedDecl *D) {
1427 return getLVForDecl(D,
1428 LVComputationKind(usesTypeVisibility(D)
1429 ? NamedDecl::VisibilityForType
1430 : NamedDecl::VisibilityForValue));
1431}
1432
1433Module *Decl::getOwningModuleForLinkage(bool IgnoreLinkage) const {
1434 Module *M = getOwningModule();
1435 if (!M)
1436 return nullptr;
1437
1438 switch (M->Kind) {
1439 case Module::ModuleMapModule:
1440 // Module map modules have no special linkage semantics.
1441 return nullptr;
1442
1443 case Module::ModuleInterfaceUnit:
1444 return M;
1445
1446 case Module::GlobalModuleFragment: {
1447 // External linkage declarations in the global module have no owning module
1448 // for linkage purposes. But internal linkage declarations in the global
1449 // module fragment of a particular module are owned by that module for
1450 // linkage purposes.
1451 if (IgnoreLinkage)
1452 return nullptr;
1453 bool InternalLinkage;
1454 if (auto *ND = dyn_cast<NamedDecl>(this))
1455 InternalLinkage = !ND->hasExternalFormalLinkage();
1456 else {
1457 auto *NSD = dyn_cast<NamespaceDecl>(this);
1458 InternalLinkage = (NSD && NSD->isAnonymousNamespace()) ||
1459 isInAnonymousNamespace();
1460 }
1461 return InternalLinkage ? M->Parent : nullptr;
1462 }
1463 }
1464
1465 llvm_unreachable("unknown module kind")::llvm::llvm_unreachable_internal("unknown module kind", "/build/llvm-toolchain-snapshot-7~svn325118/tools/clang/lib/AST/Decl.cpp"
, 1465)
;
1466}
1467
1468void NamedDecl::printName(raw_ostream &os) const {
1469 os << Name;
1470}
1471
1472std::string NamedDecl::getQualifiedNameAsString() const {
1473 std::string QualName;
1474 llvm::raw_string_ostream OS(QualName);
1475 printQualifiedName(OS, getASTContext().getPrintingPolicy());
1476 return OS.str();
1477}
1478
1479void NamedDecl::printQualifiedName(raw_ostream &OS) const {
1480 printQualifiedName(OS, getASTContext().getPrintingPolicy());
1481}
1482
1483void NamedDecl::printQualifiedName(raw_ostream &OS,
1484 const PrintingPolicy &P) const {
1485 const DeclContext *Ctx = getDeclContext();
1486
1487 // For ObjC methods, look through categories and use the interface as context.
1488 if (auto *MD = dyn_cast<ObjCMethodDecl>(this))
1489 if (auto *ID = MD->getClassInterface())
1490 Ctx = ID;
1491
1492 if (Ctx->isFunctionOrMethod()) {
1493 printName(OS);
1494 return;
1495 }
1496
1497 using ContextsTy = SmallVector<const DeclContext *, 8>;
1498 ContextsTy Contexts;
1499
1500 // Collect named contexts.
1501 while (Ctx) {
1502 if (isa<NamedDecl>(Ctx))
1503 Contexts.push_back(Ctx);
1504 Ctx = Ctx->getParent();
1505 }
1506
1507 for (const DeclContext *DC : llvm::reverse(Contexts)) {
1508 if (const auto *Spec = dyn_cast<ClassTemplateSpecializationDecl>(DC)) {
1509 OS << Spec->getName();
1510 const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs();
1511 printTemplateArgumentList(OS, TemplateArgs.asArray(), P);
1512 } else if (const auto *ND = dyn_cast<NamespaceDecl>(DC)) {
1513 if (P.SuppressUnwrittenScope &&
1514 (ND->isAnonymousNamespace() || ND->isInline()))
1515 continue;
1516 if (ND->isAnonymousNamespace()) {
1517 OS << (P.MSVCFormatting ? "`anonymous namespace\'"
1518 : "(anonymous namespace)");
1519 }
1520 else
1521 OS << *ND;
1522 } else if (const auto *RD = dyn_cast<RecordDecl>(DC)) {
1523 if (!RD->getIdentifier())
1524 OS << "(anonymous " << RD->getKindName() << ')';
1525 else
1526 OS << *RD;
1527 } else if (const auto *FD = dyn_cast<FunctionDecl>(DC)) {
1528 const FunctionProtoType *FT = nullptr;
1529 if (FD->hasWrittenPrototype())
1530 FT = dyn_cast<FunctionProtoType>(FD->getType()->castAs<FunctionType>());
1531
1532 OS << *FD << '(';
1533 if (FT) {
1534 unsigned NumParams = FD->getNumParams();
1535 for (unsigned i = 0; i < NumParams; ++i) {
1536 if (i)
1537 OS << ", ";
1538 OS << FD->getParamDecl(i)->getType().stream(P);
1539 }
1540
1541 if (FT->isVariadic()) {
1542 if (NumParams > 0)
1543 OS << ", ";
1544 OS << "...";
1545 }
1546 }
1547 OS << ')';
1548 } else if (const auto *ED = dyn_cast<EnumDecl>(DC)) {
1549 // C++ [dcl.enum]p10: Each enum-name and each unscoped
1550 // enumerator is declared in the scope that immediately contains
1551 // the enum-specifier. Each scoped enumerator is declared in the
1552 // scope of the enumeration.
1553 // For the case of unscoped enumerator, do not include in the qualified
1554 // name any information about its enum enclosing scope, as its visibility
1555 // is global.
1556 if (ED->isScoped())
1557 OS << *ED;
1558 else
1559 continue;
1560 } else {
1561 OS << *cast<NamedDecl>(DC);
1562 }
1563 OS << "::";
1564 }
1565
1566 if (getDeclName() || isa<DecompositionDecl>(this))
1567 OS << *this;
1568 else
1569 OS << "(anonymous)";
1570}
1571
1572void NamedDecl::getNameForDiagnostic(raw_ostream &OS,
1573 const PrintingPolicy &Policy,
1574 bool Qualified) const {
1575 if (Qualified)
1576 printQualifiedName(OS, Policy);
1577 else
1578 printName(OS);
1579}
1580
1581template<typename T> static bool isRedeclarableImpl(Redeclarable<T> *) {
1582 return true;
1583}
1584static bool isRedeclarableImpl(...) { return false; }
1585static bool isRedeclarable(Decl::Kind K) {
1586 switch (K) {
1587#define DECL(Type, Base) \
1588 case Decl::Type: \
1589 return isRedeclarableImpl((Type##Decl *)nullptr);
1590#define ABSTRACT_DECL(DECL)
1591#include "clang/AST/DeclNodes.inc"
1592 }
1593 llvm_unreachable("unknown decl kind")::llvm::llvm_unreachable_internal("unknown decl kind", "/build/llvm-toolchain-snapshot-7~svn325118/tools/clang/lib/AST/Decl.cpp"
, 1593)
;
1594}
1595
1596bool NamedDecl::declarationReplaces(NamedDecl *OldD, bool IsKnownNewer) const {
1597 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 1597, __extension__ __PRETTY_FUNCTION__))
;
1598
1599 // Never replace one imported declaration with another; we need both results
1600 // when re-exporting.
1601 if (OldD->isFromASTFile() && isFromASTFile())
1602 return false;
1603
1604 // A kind mismatch implies that the declaration is not replaced.
1605 if (OldD->getKind() != getKind())
1606 return false;
1607
1608 // For method declarations, we never replace. (Why?)
1609 if (isa<ObjCMethodDecl>(this))
1610 return false;
1611
1612 // For parameters, pick the newer one. This is either an error or (in
1613 // Objective-C) permitted as an extension.
1614 if (isa<ParmVarDecl>(this))
1615 return true;
1616
1617 // Inline namespaces can give us two declarations with the same
1618 // name and kind in the same scope but different contexts; we should
1619 // keep both declarations in this case.
1620 if (!this->getDeclContext()->getRedeclContext()->Equals(
1621 OldD->getDeclContext()->getRedeclContext()))
1622 return false;
1623
1624 // Using declarations can be replaced if they import the same name from the
1625 // same context.
1626 if (auto *UD = dyn_cast<UsingDecl>(this)) {
1627 ASTContext &Context = getASTContext();
1628 return Context.getCanonicalNestedNameSpecifier(UD->getQualifier()) ==
1629 Context.getCanonicalNestedNameSpecifier(
1630 cast<UsingDecl>(OldD)->getQualifier());
1631 }
1632 if (auto *UUVD = dyn_cast<UnresolvedUsingValueDecl>(this)) {
1633 ASTContext &Context = getASTContext();
1634 return Context.getCanonicalNestedNameSpecifier(UUVD->getQualifier()) ==
1635 Context.getCanonicalNestedNameSpecifier(
1636 cast<UnresolvedUsingValueDecl>(OldD)->getQualifier());
1637 }
1638
1639 if (isRedeclarable(getKind())) {
1640 if (getCanonicalDecl() != OldD->getCanonicalDecl())
1641 return false;
1642
1643 if (IsKnownNewer)
1644 return true;
1645
1646 // Check whether this is actually newer than OldD. We want to keep the
1647 // newer declaration. This loop will usually only iterate once, because
1648 // OldD is usually the previous declaration.
1649 for (auto D : redecls()) {
1650 if (D == OldD)
1651 break;
1652
1653 // If we reach the canonical declaration, then OldD is not actually older
1654 // than this one.
1655 //
1656 // FIXME: In this case, we should not add this decl to the lookup table.
1657 if (D->isCanonicalDecl())
1658 return false;
1659 }
1660
1661 // It's a newer declaration of the same kind of declaration in the same
1662 // scope: we want this decl instead of the existing one.
1663 return true;
1664 }
1665
1666 // In all other cases, we need to keep both declarations in case they have
1667 // different visibility. Any attempt to use the name will result in an
1668 // ambiguity if more than one is visible.
1669 return false;
1670}
1671
1672bool NamedDecl::hasLinkage() const {
1673 return getFormalLinkage() != NoLinkage;
1674}
1675
1676NamedDecl *NamedDecl::getUnderlyingDeclImpl() {
1677 NamedDecl *ND = this;
1678 while (auto *UD = dyn_cast<UsingShadowDecl>(ND))
1679 ND = UD->getTargetDecl();
1680
1681 if (auto *AD = dyn_cast<ObjCCompatibleAliasDecl>(ND))
1682 return AD->getClassInterface();
1683
1684 if (auto *AD = dyn_cast<NamespaceAliasDecl>(ND))
1685 return AD->getNamespace();
1686
1687 return ND;
1688}
1689
1690bool NamedDecl::isCXXInstanceMember() const {
1691 if (!isCXXClassMember())
1692 return false;
1693
1694 const NamedDecl *D = this;
1695 if (isa<UsingShadowDecl>(D))
1696 D = cast<UsingShadowDecl>(D)->getTargetDecl();
1697
1698 if (isa<FieldDecl>(D) || isa<IndirectFieldDecl>(D) || isa<MSPropertyDecl>(D))
1699 return true;
1700 if (const auto *MD = dyn_cast_or_null<CXXMethodDecl>(D->getAsFunction()))
1701 return MD->isInstance();
1702 return false;
1703}
1704
1705//===----------------------------------------------------------------------===//
1706// DeclaratorDecl Implementation
1707//===----------------------------------------------------------------------===//
1708
1709template <typename DeclT>
1710static SourceLocation getTemplateOrInnerLocStart(const DeclT *decl) {
1711 if (decl->getNumTemplateParameterLists() > 0)
1712 return decl->getTemplateParameterList(0)->getTemplateLoc();
1713 else
1714 return decl->getInnerLocStart();
1715}
1716
1717SourceLocation DeclaratorDecl::getTypeSpecStartLoc() const {
1718 TypeSourceInfo *TSI = getTypeSourceInfo();
1719 if (TSI) return TSI->getTypeLoc().getBeginLoc();
1720 return SourceLocation();
1721}
1722
1723void DeclaratorDecl::setQualifierInfo(NestedNameSpecifierLoc QualifierLoc) {
1724 if (QualifierLoc) {
1725 // Make sure the extended decl info is allocated.
1726 if (!hasExtInfo()) {
1727 // Save (non-extended) type source info pointer.
1728 auto *savedTInfo = DeclInfo.get<TypeSourceInfo*>();
1729 // Allocate external info struct.
1730 DeclInfo = new (getASTContext()) ExtInfo;
1731 // Restore savedTInfo into (extended) decl info.
1732 getExtInfo()->TInfo = savedTInfo;
1733 }
1734 // Set qualifier info.
1735 getExtInfo()->QualifierLoc = QualifierLoc;
1736 } else {
1737 // Here Qualifier == 0, i.e., we are removing the qualifier (if any).
1738 if (hasExtInfo()) {
1739 if (getExtInfo()->NumTemplParamLists == 0) {
1740 // Save type source info pointer.
1741 TypeSourceInfo *savedTInfo = getExtInfo()->TInfo;
1742 // Deallocate the extended decl info.
1743 getASTContext().Deallocate(getExtInfo());
1744 // Restore savedTInfo into (non-extended) decl info.
1745 DeclInfo = savedTInfo;
1746 }
1747 else
1748 getExtInfo()->QualifierLoc = QualifierLoc;
1749 }
1750 }
1751}
1752
1753void DeclaratorDecl::setTemplateParameterListsInfo(
1754 ASTContext &Context, ArrayRef<TemplateParameterList *> TPLists) {
1755 assert(!TPLists.empty())(static_cast <bool> (!TPLists.empty()) ? void (0) : __assert_fail
("!TPLists.empty()", "/build/llvm-toolchain-snapshot-7~svn325118/tools/clang/lib/AST/Decl.cpp"
, 1755, __extension__ __PRETTY_FUNCTION__))
;
1756 // Make sure the extended decl info is allocated.
1757 if (!hasExtInfo()) {
1758 // Save (non-extended) type source info pointer.
1759 auto *savedTInfo = DeclInfo.get<TypeSourceInfo*>();
1760 // Allocate external info struct.
1761 DeclInfo = new (getASTContext()) ExtInfo;
1762 // Restore savedTInfo into (extended) decl info.
1763 getExtInfo()->TInfo = savedTInfo;
1764 }
1765 // Set the template parameter lists info.
1766 getExtInfo()->setTemplateParameterListsInfo(Context, TPLists);
1767}
1768
1769SourceLocation DeclaratorDecl::getOuterLocStart() const {
1770 return getTemplateOrInnerLocStart(this);
1771}
1772
1773// Helper function: returns true if QT is or contains a type
1774// having a postfix component.
1775static bool typeIsPostfix(QualType QT) {
1776 while (true) {
1777 const Type* T = QT.getTypePtr();
1778 switch (T->getTypeClass()) {
1779 default:
1780 return false;
1781 case Type::Pointer:
1782 QT = cast<PointerType>(T)->getPointeeType();
1783 break;
1784 case Type::BlockPointer:
1785 QT = cast<BlockPointerType>(T)->getPointeeType();
1786 break;
1787 case Type::MemberPointer:
1788 QT = cast<MemberPointerType>(T)->getPointeeType();
1789 break;
1790 case Type::LValueReference:
1791 case Type::RValueReference:
1792 QT = cast<ReferenceType>(T)->getPointeeType();
1793 break;
1794 case Type::PackExpansion:
1795 QT = cast<PackExpansionType>(T)->getPattern();
1796 break;
1797 case Type::Paren:
1798 case Type::ConstantArray:
1799 case Type::DependentSizedArray:
1800 case Type::IncompleteArray:
1801 case Type::VariableArray:
1802 case Type::FunctionProto:
1803 case Type::FunctionNoProto:
1804 return true;
1805 }
1806 }
1807}
1808
1809SourceRange DeclaratorDecl::getSourceRange() const {
1810 SourceLocation RangeEnd = getLocation();
1811 if (TypeSourceInfo *TInfo = getTypeSourceInfo()) {
1812 // If the declaration has no name or the type extends past the name take the
1813 // end location of the type.
1814 if (!getDeclName() || typeIsPostfix(TInfo->getType()))
1815 RangeEnd = TInfo->getTypeLoc().getSourceRange().getEnd();
1816 }
1817 return SourceRange(getOuterLocStart(), RangeEnd);
1818}
1819
1820void QualifierInfo::setTemplateParameterListsInfo(
1821 ASTContext &Context, ArrayRef<TemplateParameterList *> TPLists) {
1822 // Free previous template parameters (if any).
1823 if (NumTemplParamLists > 0) {
1824 Context.Deallocate(TemplParamLists);
1825 TemplParamLists = nullptr;
1826 NumTemplParamLists = 0;
1827 }
1828 // Set info on matched template parameter lists (if any).
1829 if (!TPLists.empty()) {
1830 TemplParamLists = new (Context) TemplateParameterList *[TPLists.size()];
1831 NumTemplParamLists = TPLists.size();
1832 std::copy(TPLists.begin(), TPLists.end(), TemplParamLists);
1833 }
1834}
1835
1836//===----------------------------------------------------------------------===//
1837// VarDecl Implementation
1838//===----------------------------------------------------------------------===//
1839
1840const char *VarDecl::getStorageClassSpecifierString(StorageClass SC) {
1841 switch (SC) {
1842 case SC_None: break;
1843 case SC_Auto: return "auto";
1844 case SC_Extern: return "extern";
1845 case SC_PrivateExtern: return "__private_extern__";
1846 case SC_Register: return "register";
1847 case SC_Static: return "static";
1848 }
1849
1850 llvm_unreachable("Invalid storage class")::llvm::llvm_unreachable_internal("Invalid storage class", "/build/llvm-toolchain-snapshot-7~svn325118/tools/clang/lib/AST/Decl.cpp"
, 1850)
;
1851}
1852
1853VarDecl::VarDecl(Kind DK, ASTContext &C, DeclContext *DC,
1854 SourceLocation StartLoc, SourceLocation IdLoc,
1855 IdentifierInfo *Id, QualType T, TypeSourceInfo *TInfo,
1856 StorageClass SC)
1857 : DeclaratorDecl(DK, DC, IdLoc, Id, T, TInfo, StartLoc),
1858 redeclarable_base(C) {
1859 static_assert(sizeof(VarDeclBitfields) <= sizeof(unsigned),
1860 "VarDeclBitfields too large!");
1861 static_assert(sizeof(ParmVarDeclBitfields) <= sizeof(unsigned),
1862 "ParmVarDeclBitfields too large!");
1863 static_assert(sizeof(NonParmVarDeclBitfields) <= sizeof(unsigned),
1864 "NonParmVarDeclBitfields too large!");
1865 AllBits = 0;
1866 VarDeclBits.SClass = SC;
1867 // Everything else is implicitly initialized to false.
1868}
1869
1870VarDecl *VarDecl::Create(ASTContext &C, DeclContext *DC,
1871 SourceLocation StartL, SourceLocation IdL,
1872 IdentifierInfo *Id, QualType T, TypeSourceInfo *TInfo,
1873 StorageClass S) {
1874 return new (C, DC) VarDecl(Var, C, DC, StartL, IdL, Id, T, TInfo, S);
1875}
1876
1877VarDecl *VarDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
1878 return new (C, ID)
1879 VarDecl(Var, C, nullptr, SourceLocation(), SourceLocation(), nullptr,
1880 QualType(), nullptr, SC_None);
1881}
1882
1883void VarDecl::setStorageClass(StorageClass SC) {
1884 assert(isLegalForVariable(SC))(static_cast <bool> (isLegalForVariable(SC)) ? void (0)
: __assert_fail ("isLegalForVariable(SC)", "/build/llvm-toolchain-snapshot-7~svn325118/tools/clang/lib/AST/Decl.cpp"
, 1884, __extension__ __PRETTY_FUNCTION__))
;
1885 VarDeclBits.SClass = SC;
1886}
1887
1888VarDecl::TLSKind VarDecl::getTLSKind() const {
1889 switch (VarDeclBits.TSCSpec) {
1890 case TSCS_unspecified:
1891 if (!hasAttr<ThreadAttr>() &&
1892 !(getASTContext().getLangOpts().OpenMPUseTLS &&
1893 getASTContext().getTargetInfo().isTLSSupported() &&
1894 hasAttr<OMPThreadPrivateDeclAttr>()))
1895 return TLS_None;
1896 return ((getASTContext().getLangOpts().isCompatibleWithMSVC(
1897 LangOptions::MSVC2015)) ||
1898 hasAttr<OMPThreadPrivateDeclAttr>())
1899 ? TLS_Dynamic
1900 : TLS_Static;
1901 case TSCS___thread: // Fall through.
1902 case TSCS__Thread_local:
1903 return TLS_Static;
1904 case TSCS_thread_local:
1905 return TLS_Dynamic;
1906 }
1907 llvm_unreachable("Unknown thread storage class specifier!")::llvm::llvm_unreachable_internal("Unknown thread storage class specifier!"
, "/build/llvm-toolchain-snapshot-7~svn325118/tools/clang/lib/AST/Decl.cpp"
, 1907)
;
1908}
1909
1910SourceRange VarDecl::getSourceRange() const {
1911 if (const Expr *Init = getInit()) {
1912 SourceLocation InitEnd = Init->getLocEnd();
1913 // If Init is implicit, ignore its source range and fallback on
1914 // DeclaratorDecl::getSourceRange() to handle postfix elements.
1915 if (InitEnd.isValid() && InitEnd != getLocation())
1916 return SourceRange(getOuterLocStart(), InitEnd);
1917 }
1918 return DeclaratorDecl::getSourceRange();
1919}
1920
1921template<typename T>
1922static LanguageLinkage getDeclLanguageLinkage(const T &D) {
1923 // C++ [dcl.link]p1: All function types, function names with external linkage,
1924 // and variable names with external linkage have a language linkage.
1925 if (!D.hasExternalFormalLinkage())
1926 return NoLanguageLinkage;
1927
1928 // Language linkage is a C++ concept, but saying that everything else in C has
1929 // C language linkage fits the implementation nicely.
1930 ASTContext &Context = D.getASTContext();
1931 if (!Context.getLangOpts().CPlusPlus)
1932 return CLanguageLinkage;
1933
1934 // C++ [dcl.link]p4: A C language linkage is ignored in determining the
1935 // language linkage of the names of class members and the function type of
1936 // class member functions.
1937 const DeclContext *DC = D.getDeclContext();
1938 if (DC->isRecord())
1939 return CXXLanguageLinkage;
1940
1941 // If the first decl is in an extern "C" context, any other redeclaration
1942 // will have C language linkage. If the first one is not in an extern "C"
1943 // context, we would have reported an error for any other decl being in one.
1944 if (isFirstInExternCContext(&D))
1945 return CLanguageLinkage;
1946 return CXXLanguageLinkage;
1947}
1948
1949template<typename T>
1950static bool isDeclExternC(const T &D) {
1951 // Since the context is ignored for class members, they can only have C++
1952 // language linkage or no language linkage.
1953 const DeclContext *DC = D.getDeclContext();
1954 if (DC->isRecord()) {
1955 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 1955, __extension__ __PRETTY_FUNCTION__))
;
1956 return false;
1957 }
1958
1959 return D.getLanguageLinkage() == CLanguageLinkage;
1960}
1961
1962LanguageLinkage VarDecl::getLanguageLinkage() const {
1963 return getDeclLanguageLinkage(*this);
1964}
1965
1966bool VarDecl::isExternC() const {
1967 return isDeclExternC(*this);
1968}
1969
1970bool VarDecl::isInExternCContext() const {
1971 return getLexicalDeclContext()->isExternCContext();
1972}
1973
1974bool VarDecl::isInExternCXXContext() const {
1975 return getLexicalDeclContext()->isExternCXXContext();
1976}
1977
1978VarDecl *VarDecl::getCanonicalDecl() { return getFirstDecl(); }
1979
1980VarDecl::DefinitionKind
1981VarDecl::isThisDeclarationADefinition(ASTContext &C) const {
1982 if (isThisDeclarationADemotedDefinition())
1983 return DeclarationOnly;
1984
1985 // C++ [basic.def]p2:
1986 // A declaration is a definition unless [...] it contains the 'extern'
1987 // specifier or a linkage-specification and neither an initializer [...],
1988 // it declares a non-inline static data member in a class declaration [...],
1989 // it declares a static data member outside a class definition and the variable
1990 // was defined within the class with the constexpr specifier [...],
1991 // C++1y [temp.expl.spec]p15:
1992 // An explicit specialization of a static data member or an explicit
1993 // specialization of a static data member template is a definition if the
1994 // declaration includes an initializer; otherwise, it is a declaration.
1995 //
1996 // FIXME: How do you declare (but not define) a partial specialization of
1997 // a static data member template outside the containing class?
1998 if (isStaticDataMember()) {
1999 if (isOutOfLine() &&
2000 !(getCanonicalDecl()->isInline() &&
2001 getCanonicalDecl()->isConstexpr()) &&
2002 (hasInit() ||
2003 // If the first declaration is out-of-line, this may be an
2004 // instantiation of an out-of-line partial specialization of a variable
2005 // template for which we have not yet instantiated the initializer.
2006 (getFirstDecl()->isOutOfLine()
2007 ? getTemplateSpecializationKind() == TSK_Undeclared
2008 : getTemplateSpecializationKind() !=
2009 TSK_ExplicitSpecialization) ||
2010 isa<VarTemplatePartialSpecializationDecl>(this)))
2011 return Definition;
2012 else if (!isOutOfLine() && isInline())
2013 return Definition;
2014 else
2015 return DeclarationOnly;
2016 }
2017 // C99 6.7p5:
2018 // A definition of an identifier is a declaration for that identifier that
2019 // [...] causes storage to be reserved for that object.
2020 // Note: that applies for all non-file-scope objects.
2021 // C99 6.9.2p1:
2022 // If the declaration of an identifier for an object has file scope and an
2023 // initializer, the declaration is an external definition for the identifier
2024 if (hasInit())
2025 return Definition;
2026
2027 if (hasDefiningAttr())
2028 return Definition;
2029
2030 if (const auto *SAA = getAttr<SelectAnyAttr>())
2031 if (!SAA->isInherited())
2032 return Definition;
2033
2034 // A variable template specialization (other than a static data member
2035 // template or an explicit specialization) is a declaration until we
2036 // instantiate its initializer.
2037 if (auto *VTSD = dyn_cast<VarTemplateSpecializationDecl>(this)) {
2038 if (VTSD->getTemplateSpecializationKind() != TSK_ExplicitSpecialization &&
2039 !isa<VarTemplatePartialSpecializationDecl>(VTSD) &&
2040 !VTSD->IsCompleteDefinition)
2041 return DeclarationOnly;
2042 }
2043
2044 if (hasExternalStorage())
2045 return DeclarationOnly;
2046
2047 // [dcl.link] p7:
2048 // A declaration directly contained in a linkage-specification is treated
2049 // as if it contains the extern specifier for the purpose of determining
2050 // the linkage of the declared name and whether it is a definition.
2051 if (isSingleLineLanguageLinkage(*this))
2052 return DeclarationOnly;
2053
2054 // C99 6.9.2p2:
2055 // A declaration of an object that has file scope without an initializer,
2056 // and without a storage class specifier or the scs 'static', constitutes
2057 // a tentative definition.
2058 // No such thing in C++.
2059 if (!C.getLangOpts().CPlusPlus && isFileVarDecl())
2060 return TentativeDefinition;
2061
2062 // What's left is (in C, block-scope) declarations without initializers or
2063 // external storage. These are definitions.
2064 return Definition;
2065}
2066
2067VarDecl *VarDecl::getActingDefinition() {
2068 DefinitionKind Kind = isThisDeclarationADefinition();
2069 if (Kind != TentativeDefinition)
2070 return nullptr;
2071
2072 VarDecl *LastTentative = nullptr;
2073 VarDecl *First = getFirstDecl();
2074 for (auto I : First->redecls()) {
2075 Kind = I->isThisDeclarationADefinition();
2076 if (Kind == Definition)
2077 return nullptr;
2078 else if (Kind == TentativeDefinition)
2079 LastTentative = I;
2080 }
2081 return LastTentative;
2082}
2083
2084VarDecl *VarDecl::getDefinition(ASTContext &C) {
2085 VarDecl *First = getFirstDecl();
2086 for (auto I : First->redecls()) {
2087 if (I->isThisDeclarationADefinition(C) == Definition)
2088 return I;
2089 }
2090 return nullptr;
2091}
2092
2093VarDecl::DefinitionKind VarDecl::hasDefinition(ASTContext &C) const {
2094 DefinitionKind Kind = DeclarationOnly;
2095
2096 const VarDecl *First = getFirstDecl();
2097 for (auto I : First->redecls()) {
2098 Kind = std::max(Kind, I->isThisDeclarationADefinition(C));
2099 if (Kind == Definition)
2100 break;
2101 }
2102
2103 return Kind;
2104}
2105
2106const Expr *VarDecl::getAnyInitializer(const VarDecl *&D) const {
2107 for (auto I : redecls()) {
2108 if (auto Expr = I->getInit()) {
2109 D = I;
2110 return Expr;
2111 }
2112 }
2113 return nullptr;
2114}
2115
2116bool VarDecl::hasInit() const {
2117 if (auto *P = dyn_cast<ParmVarDecl>(this))
2118 if (P->hasUnparsedDefaultArg() || P->hasUninstantiatedDefaultArg())
2119 return false;
2120
2121 return !Init.isNull();
2122}
2123
2124Expr *VarDecl::getInit() {
2125 if (!hasInit())
2126 return nullptr;
2127
2128 if (auto *S = Init.dyn_cast<Stmt *>())
2129 return cast<Expr>(S);
2130
2131 return cast_or_null<Expr>(Init.get<EvaluatedStmt *>()->Value);
2132}
2133
2134Stmt **VarDecl::getInitAddress() {
2135 if (auto *ES = Init.dyn_cast<EvaluatedStmt *>())
2136 return &ES->Value;
2137
2138 return Init.getAddrOfPtr1();
2139}
2140
2141bool VarDecl::isOutOfLine() const {
2142 if (Decl::isOutOfLine())
2143 return true;
2144
2145 if (!isStaticDataMember())
2146 return false;
2147
2148 // If this static data member was instantiated from a static data member of
2149 // a class template, check whether that static data member was defined
2150 // out-of-line.
2151 if (VarDecl *VD = getInstantiatedFromStaticDataMember())
2152 return VD->isOutOfLine();
2153
2154 return false;
2155}
2156
2157void VarDecl::setInit(Expr *I) {
2158 if (auto *Eval = Init.dyn_cast<EvaluatedStmt *>()) {
2159 Eval->~EvaluatedStmt();
2160 getASTContext().Deallocate(Eval);
2161 }
2162
2163 Init = I;
2164}
2165
2166bool VarDecl::isUsableInConstantExpressions(ASTContext &C) const {
2167 const LangOptions &Lang = C.getLangOpts();
2168
2169 if (!Lang.CPlusPlus)
2170 return false;
2171
2172 // In C++11, any variable of reference type can be used in a constant
2173 // expression if it is initialized by a constant expression.
2174 if (Lang.CPlusPlus11 && getType()->isReferenceType())
2175 return true;
2176
2177 // Only const objects can be used in constant expressions in C++. C++98 does
2178 // not require the variable to be non-volatile, but we consider this to be a
2179 // defect.
2180 if (!getType().isConstQualified() || getType().isVolatileQualified())
2181 return false;
2182
2183 // In C++, const, non-volatile variables of integral or enumeration types
2184 // can be used in constant expressions.
2185 if (getType()->isIntegralOrEnumerationType())
2186 return true;
2187
2188 // Additionally, in C++11, non-volatile constexpr variables can be used in
2189 // constant expressions.
2190 return Lang.CPlusPlus11 && isConstexpr();
2191}
2192
2193/// Convert the initializer for this declaration to the elaborated EvaluatedStmt
2194/// form, which contains extra information on the evaluated value of the
2195/// initializer.
2196EvaluatedStmt *VarDecl::ensureEvaluatedStmt() const {
2197 auto *Eval = Init.dyn_cast<EvaluatedStmt *>();
2198 if (!Eval) {
2199 // Note: EvaluatedStmt contains an APValue, which usually holds
2200 // resources not allocated from the ASTContext. We need to do some
2201 // work to avoid leaking those, but we do so in VarDecl::evaluateValue
2202 // where we can detect whether there's anything to clean up or not.
2203 Eval = new (getASTContext()) EvaluatedStmt;
2204 Eval->Value = Init.get<Stmt *>();
2205 Init = Eval;
2206 }
2207 return Eval;
2208}
2209
2210APValue *VarDecl::evaluateValue() const {
2211 SmallVector<PartialDiagnosticAt, 8> Notes;
2212 return evaluateValue(Notes);
2213}
2214
2215APValue *VarDecl::evaluateValue(
2216 SmallVectorImpl<PartialDiagnosticAt> &Notes) const {
2217 EvaluatedStmt *Eval = ensureEvaluatedStmt();
2218
2219 // We only produce notes indicating why an initializer is non-constant the
2220 // first time it is evaluated. FIXME: The notes won't always be emitted the
2221 // first time we try evaluation, so might not be produced at all.
2222 if (Eval->WasEvaluated)
2223 return Eval->Evaluated.isUninit() ? nullptr : &Eval->Evaluated;
2224
2225 const auto *Init = cast<Expr>(Eval->Value);
2226 assert(!Init->isValueDependent())(static_cast <bool> (!Init->isValueDependent()) ? void
(0) : __assert_fail ("!Init->isValueDependent()", "/build/llvm-toolchain-snapshot-7~svn325118/tools/clang/lib/AST/Decl.cpp"
, 2226, __extension__ __PRETTY_FUNCTION__))
;
2227
2228 if (Eval->IsEvaluating) {
2229 // FIXME: Produce a diagnostic for self-initialization.
2230 Eval->CheckedICE = true;
2231 Eval->IsICE = false;
2232 return nullptr;
2233 }
2234
2235 Eval->IsEvaluating = true;
2236
2237 bool Result = Init->EvaluateAsInitializer(Eval->Evaluated, getASTContext(),
2238 this, Notes);
2239
2240 // Ensure the computed APValue is cleaned up later if evaluation succeeded,
2241 // or that it's empty (so that there's nothing to clean up) if evaluation
2242 // failed.
2243 if (!Result)
2244 Eval->Evaluated = APValue();
2245 else if (Eval->Evaluated.needsCleanup())
2246 getASTContext().addDestruction(&Eval->Evaluated);
2247
2248 Eval->IsEvaluating = false;
2249 Eval->WasEvaluated = true;
2250
2251 // In C++11, we have determined whether the initializer was a constant
2252 // expression as a side-effect.
2253 if (getASTContext().getLangOpts().CPlusPlus11 && !Eval->CheckedICE) {
2254 Eval->CheckedICE = true;
2255 Eval->IsICE = Result && Notes.empty();
2256 }
2257
2258 return Result ? &Eval->Evaluated : nullptr;
2259}
2260
2261APValue *VarDecl::getEvaluatedValue() const {
2262 if (EvaluatedStmt *Eval = Init.dyn_cast<EvaluatedStmt *>())
2263 if (Eval->WasEvaluated)
2264 return &Eval->Evaluated;
2265
2266 return nullptr;
2267}
2268
2269bool VarDecl::isInitKnownICE() const {
2270 if (EvaluatedStmt *Eval = Init.dyn_cast<EvaluatedStmt *>())
2271 return Eval->CheckedICE;
2272
2273 return false;
2274}
2275
2276bool VarDecl::isInitICE() const {
2277 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 2278, __extension__ __PRETTY_FUNCTION__))
2278 "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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 2278, __extension__ __PRETTY_FUNCTION__))
;
2279 return Init.get<EvaluatedStmt *>()->IsICE;
2280}
2281
2282bool VarDecl::checkInitIsICE() const {
2283 // Initializers of weak variables are never ICEs.
2284 if (isWeak())
2285 return false;
2286
2287 EvaluatedStmt *Eval = ensureEvaluatedStmt();
2288 if (Eval->CheckedICE)
2289 // We have already checked whether this subexpression is an
2290 // integral constant expression.
2291 return Eval->IsICE;
2292
2293 const auto *Init = cast<Expr>(Eval->Value);
2294 assert(!Init->isValueDependent())(static_cast <bool> (!Init->isValueDependent()) ? void
(0) : __assert_fail ("!Init->isValueDependent()", "/build/llvm-toolchain-snapshot-7~svn325118/tools/clang/lib/AST/Decl.cpp"
, 2294, __extension__ __PRETTY_FUNCTION__))
;
2295
2296 // In C++11, evaluate the initializer to check whether it's a constant
2297 // expression.
2298 if (getASTContext().getLangOpts().CPlusPlus11) {
2299 SmallVector<PartialDiagnosticAt, 8> Notes;
2300 evaluateValue(Notes);
2301 return Eval->IsICE;
2302 }
2303
2304 // It's an ICE whether or not the definition we found is
2305 // out-of-line. See DR 721 and the discussion in Clang PR
2306 // 6206 for details.
2307
2308 if (Eval->CheckingICE)
2309 return false;
2310 Eval->CheckingICE = true;
2311
2312 Eval->IsICE = Init->isIntegerConstantExpr(getASTContext());
2313 Eval->CheckingICE = false;
2314 Eval->CheckedICE = true;
2315 return Eval->IsICE;
2316}
2317
2318template<typename DeclT>
2319static DeclT *getDefinitionOrSelf(DeclT *D) {
2320 assert(D)(static_cast <bool> (D) ? void (0) : __assert_fail ("D"
, "/build/llvm-toolchain-snapshot-7~svn325118/tools/clang/lib/AST/Decl.cpp"
, 2320, __extension__ __PRETTY_FUNCTION__))
;
2321 if (auto *Def = D->getDefinition())
2322 return Def;
2323 return D;
2324}
2325
2326VarDecl *VarDecl::getTemplateInstantiationPattern() const {
2327 // If it's a variable template specialization, find the template or partial
2328 // specialization from which it was instantiated.
2329 if (auto *VDTemplSpec = dyn_cast<VarTemplateSpecializationDecl>(this)) {
2330 auto From = VDTemplSpec->getInstantiatedFrom();
2331 if (auto *VTD = From.dyn_cast<VarTemplateDecl *>()) {
2332 while (auto *NewVTD = VTD->getInstantiatedFromMemberTemplate()) {
2333 if (NewVTD->isMemberSpecialization())
2334 break;
2335 VTD = NewVTD;
2336 }
2337 return getDefinitionOrSelf(VTD->getTemplatedDecl());
2338 }
2339 if (auto *VTPSD =
2340 From.dyn_cast<VarTemplatePartialSpecializationDecl *>()) {
2341 while (auto *NewVTPSD = VTPSD->getInstantiatedFromMember()) {
2342 if (NewVTPSD->isMemberSpecialization())
2343 break;
2344 VTPSD = NewVTPSD;
2345 }
2346 return getDefinitionOrSelf<VarDecl>(VTPSD);
2347 }
2348 }
2349
2350 if (MemberSpecializationInfo *MSInfo = getMemberSpecializationInfo()) {
2351 if (isTemplateInstantiation(MSInfo->getTemplateSpecializationKind())) {
2352 VarDecl *VD = getInstantiatedFromStaticDataMember();
2353 while (auto *NewVD = VD->getInstantiatedFromStaticDataMember())
2354 VD = NewVD;
2355 return getDefinitionOrSelf(VD);
2356 }
2357 }
2358
2359 if (VarTemplateDecl *VarTemplate = getDescribedVarTemplate()) {
2360 while (VarTemplate->getInstantiatedFromMemberTemplate()) {
2361 if (VarTemplate->isMemberSpecialization())
2362 break;
2363 VarTemplate = VarTemplate->getInstantiatedFromMemberTemplate();
2364 }
2365
2366 return getDefinitionOrSelf(VarTemplate->getTemplatedDecl());
2367 }
2368 return nullptr;
2369}
2370
2371VarDecl *VarDecl::getInstantiatedFromStaticDataMember() const {
2372 if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo())
2373 return cast<VarDecl>(MSI->getInstantiatedFrom());
2374
2375 return nullptr;
2376}
2377
2378TemplateSpecializationKind VarDecl::getTemplateSpecializationKind() const {
2379 if (const auto *Spec = dyn_cast<VarTemplateSpecializationDecl>(this))
2380 return Spec->getSpecializationKind();
2381
2382 if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo())
2383 return MSI->getTemplateSpecializationKind();
2384
2385 return TSK_Undeclared;
2386}
2387
2388SourceLocation VarDecl::getPointOfInstantiation() const {
2389 if (const auto *Spec = dyn_cast<VarTemplateSpecializationDecl>(this))
2390 return Spec->getPointOfInstantiation();
2391
2392 if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo())
2393 return MSI->getPointOfInstantiation();
2394
2395 return SourceLocation();
2396}
2397
2398VarTemplateDecl *VarDecl::getDescribedVarTemplate() const {
2399 return getASTContext().getTemplateOrSpecializationInfo(this)
2400 .dyn_cast<VarTemplateDecl *>();
2401}
2402
2403void VarDecl::setDescribedVarTemplate(VarTemplateDecl *Template) {
2404 getASTContext().setTemplateOrSpecializationInfo(this, Template);
2405}
2406
2407MemberSpecializationInfo *VarDecl::getMemberSpecializationInfo() const {
2408 if (isStaticDataMember())
2409 // FIXME: Remove ?
2410 // return getASTContext().getInstantiatedFromStaticDataMember(this);
2411 return getASTContext().getTemplateOrSpecializationInfo(this)
2412 .dyn_cast<MemberSpecializationInfo *>();
2413 return nullptr;
2414}
2415
2416void VarDecl::setTemplateSpecializationKind(TemplateSpecializationKind TSK,
2417 SourceLocation PointOfInstantiation) {
2418 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 2420, __extension__ __PRETTY_FUNCTION__))
2419 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 2420, __extension__ __PRETTY_FUNCTION__))
2420 "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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 2420, __extension__ __PRETTY_FUNCTION__))
;
2421
2422 if (VarTemplateSpecializationDecl *Spec =
2423 dyn_cast<VarTemplateSpecializationDecl>(this)) {
2424 Spec->setSpecializationKind(TSK);
2425 if (TSK != TSK_ExplicitSpecialization && PointOfInstantiation.isValid() &&
2426 Spec->getPointOfInstantiation().isInvalid()) {
2427 Spec->setPointOfInstantiation(PointOfInstantiation);
2428 if (ASTMutationListener *L = getASTContext().getASTMutationListener())
2429 L->InstantiationRequested(this);
2430 }
2431 }
2432
2433 if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo()) {
2434 MSI->setTemplateSpecializationKind(TSK);
2435 if (TSK != TSK_ExplicitSpecialization && PointOfInstantiation.isValid() &&
2436 MSI->getPointOfInstantiation().isInvalid()) {
2437 MSI->setPointOfInstantiation(PointOfInstantiation);
2438 if (ASTMutationListener *L = getASTContext().getASTMutationListener())
2439 L->InstantiationRequested(this);
2440 }
2441 }
2442}
2443
2444void
2445VarDecl::setInstantiationOfStaticDataMember(VarDecl *VD,
2446 TemplateSpecializationKind TSK) {
2447 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 2448, __extension__ __PRETTY_FUNCTION__))
2448 "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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 2448, __extension__ __PRETTY_FUNCTION__))
;
2449 getASTContext().setInstantiatedFromStaticDataMember(this, VD, TSK);
2450}
2451
2452//===----------------------------------------------------------------------===//
2453// ParmVarDecl Implementation
2454//===----------------------------------------------------------------------===//
2455
2456ParmVarDecl *ParmVarDecl::Create(ASTContext &C, DeclContext *DC,
2457 SourceLocation StartLoc,
2458 SourceLocation IdLoc, IdentifierInfo *Id,
2459 QualType T, TypeSourceInfo *TInfo,
2460 StorageClass S, Expr *DefArg) {
2461 return new (C, DC) ParmVarDecl(ParmVar, C, DC, StartLoc, IdLoc, Id, T, TInfo,
2462 S, DefArg);
2463}
2464
2465QualType ParmVarDecl::getOriginalType() const {
2466 TypeSourceInfo *TSI = getTypeSourceInfo();
2467 QualType T = TSI ? TSI->getType() : getType();
2468 if (const auto *DT = dyn_cast<DecayedType>(T))
2469 return DT->getOriginalType();
2470 return T;
2471}
2472
2473ParmVarDecl *ParmVarDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
2474 return new (C, ID)
2475 ParmVarDecl(ParmVar, C, nullptr, SourceLocation(), SourceLocation(),
2476 nullptr, QualType(), nullptr, SC_None, nullptr);
2477}
2478
2479SourceRange ParmVarDecl::getSourceRange() const {
2480 if (!hasInheritedDefaultArg()) {
2481 SourceRange ArgRange = getDefaultArgRange();
2482 if (ArgRange.isValid())
2483 return SourceRange(getOuterLocStart(), ArgRange.getEnd());
2484 }
2485
2486 // DeclaratorDecl considers the range of postfix types as overlapping with the
2487 // declaration name, but this is not the case with parameters in ObjC methods.
2488 if (isa<ObjCMethodDecl>(getDeclContext()))
2489 return SourceRange(DeclaratorDecl::getLocStart(), getLocation());
2490
2491 return DeclaratorDecl::getSourceRange();
2492}
2493
2494Expr *ParmVarDecl::getDefaultArg() {
2495 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 2495, __extension__ __PRETTY_FUNCTION__))
;
2496 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 2497, __extension__ __PRETTY_FUNCTION__))
2497 "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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 2497, __extension__ __PRETTY_FUNCTION__))
;
2498
2499 Expr *Arg = getInit();
2500 if (auto *E = dyn_cast_or_null<ExprWithCleanups>(Arg))
2501 return E->getSubExpr();
2502
2503 return Arg;
2504}
2505
2506void ParmVarDecl::setDefaultArg(Expr *defarg) {
2507 ParmVarDeclBits.DefaultArgKind = DAK_Normal;
2508 Init = defarg;
2509}
2510
2511SourceRange ParmVarDecl::getDefaultArgRange() const {
2512 switch (ParmVarDeclBits.DefaultArgKind) {
2513 case DAK_None:
2514 case DAK_Unparsed:
2515 // Nothing we can do here.
2516 return SourceRange();
2517
2518 case DAK_Uninstantiated:
2519 return getUninstantiatedDefaultArg()->getSourceRange();
2520
2521 case DAK_Normal:
2522 if (const Expr *E = getInit())
2523 return E->getSourceRange();
2524
2525 // Missing an actual expression, may be invalid.
2526 return SourceRange();
2527 }
2528 llvm_unreachable("Invalid default argument kind.")::llvm::llvm_unreachable_internal("Invalid default argument kind."
, "/build/llvm-toolchain-snapshot-7~svn325118/tools/clang/lib/AST/Decl.cpp"
, 2528)
;
2529}
2530
2531void ParmVarDecl::setUninstantiatedDefaultArg(Expr *arg) {
2532 ParmVarDeclBits.DefaultArgKind = DAK_Uninstantiated;
2533 Init = arg;
2534}
2535
2536Expr *ParmVarDecl::getUninstantiatedDefaultArg() {
2537 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 2538, __extension__ __PRETTY_FUNCTION__))
2538 "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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 2538, __extension__ __PRETTY_FUNCTION__))
;
2539 return cast_or_null<Expr>(Init.get<Stmt *>());
2540}
2541
2542bool ParmVarDecl::hasDefaultArg() const {
2543 // FIXME: We should just return false for DAK_None here once callers are
2544 // prepared for the case that we encountered an invalid default argument and
2545 // were unable to even build an invalid expression.
2546 return hasUnparsedDefaultArg() || hasUninstantiatedDefaultArg() ||
2547 !Init.isNull();
2548}
2549
2550bool ParmVarDecl::isParameterPack() const {
2551 return isa<PackExpansionType>(getType());
2552}
2553
2554void ParmVarDecl::setParameterIndexLarge(unsigned parameterIndex) {
2555 getASTContext().setParameterIndex(this, parameterIndex);
2556 ParmVarDeclBits.ParameterIndex = ParameterIndexSentinel;
2557}
2558
2559unsigned ParmVarDecl::getParameterIndexLarge() const {
2560 return getASTContext().getParameterIndex(this);
2561}
2562
2563//===----------------------------------------------------------------------===//
2564// FunctionDecl Implementation
2565//===----------------------------------------------------------------------===//
2566
2567void FunctionDecl::getNameForDiagnostic(
2568 raw_ostream &OS, const PrintingPolicy &Policy, bool Qualified) const {
2569 NamedDecl::getNameForDiagnostic(OS, Policy, Qualified);
2570 const TemplateArgumentList *TemplateArgs = getTemplateSpecializationArgs();
2571 if (TemplateArgs)
2572 printTemplateArgumentList(OS, TemplateArgs->asArray(), Policy);
2573}
2574
2575bool FunctionDecl::isVariadic() const {
2576 if (const auto *FT = getType()->getAs<FunctionProtoType>())
2577 return FT->isVariadic();
2578 return false;
2579}
2580
2581bool FunctionDecl::hasBody(const FunctionDecl *&Definition) const {
2582 for (auto I : redecls()) {
2583 if (I->doesThisDeclarationHaveABody()) {
2584 Definition = I;
2585 return true;
2586 }
2587 }
2588
2589 return false;
2590}
2591
2592bool FunctionDecl::hasTrivialBody() const
2593{
2594 Stmt *S = getBody();
2595 if (!S) {
2596 // Since we don't have a body for this function, we don't know if it's
2597 // trivial or not.
2598 return false;
2599 }
2600
2601 if (isa<CompoundStmt>(S) && cast<CompoundStmt>(S)->body_empty())
2602 return true;
2603 return false;
2604}
2605
2606bool FunctionDecl::isDefined(const FunctionDecl *&Definition) const {
2607 for (auto I : redecls()) {
2608 if (I->isThisDeclarationADefinition()) {
2609 Definition = I;
2610 return true;
2611 }
2612 }
2613
2614 return false;
2615}
2616
2617Stmt *FunctionDecl::getBody(const FunctionDecl *&Definition) const {
2618 if (!hasBody(Definition))
2619 return nullptr;
2620
2621 if (Definition->Body)
2622 return Definition->Body.get(getASTContext().getExternalSource());
2623
2624 return nullptr;
2625}
2626
2627void FunctionDecl::setBody(Stmt *B) {
2628 Body = B;
2629 if (B)
2630 EndRangeLoc = B->getLocEnd();
2631}
2632
2633void FunctionDecl::setPure(bool P) {
2634 IsPure = P;
2635 if (P)
2636 if (auto *Parent = dyn_cast<CXXRecordDecl>(getDeclContext()))
2637 Parent->markedVirtualFunctionPure();
2638}
2639
2640template<std::size_t Len>
2641static bool isNamed(const NamedDecl *ND, const char (&Str)[Len]) {
2642 IdentifierInfo *II = ND->getIdentifier();
2643 return II && II->isStr(Str);
2644}
2645
2646bool FunctionDecl::isMain() const {
2647 const TranslationUnitDecl *tunit =
2648 dyn_cast<TranslationUnitDecl>(getDeclContext()->getRedeclContext());
2649 return tunit &&
2650 !tunit->getASTContext().getLangOpts().Freestanding &&
2651 isNamed(this, "main");
2652}
2653
2654bool FunctionDecl::isMSVCRTEntryPoint() const {
2655 const TranslationUnitDecl *TUnit =
2656 dyn_cast<TranslationUnitDecl>(getDeclContext()->getRedeclContext());
2657 if (!TUnit)
2658 return false;
2659
2660 // Even though we aren't really targeting MSVCRT if we are freestanding,
2661 // semantic analysis for these functions remains the same.
2662
2663 // MSVCRT entry points only exist on MSVCRT targets.
2664 if (!TUnit->getASTContext().getTargetInfo().getTriple().isOSMSVCRT())
2665 return false;
2666
2667 // Nameless functions like constructors cannot be entry points.
2668 if (!getIdentifier())
2669 return false;
2670
2671 return llvm::StringSwitch<bool>(getName())
2672 .Cases("main", // an ANSI console app
2673 "wmain", // a Unicode console App
2674 "WinMain", // an ANSI GUI app
2675 "wWinMain", // a Unicode GUI app
2676 "DllMain", // a DLL
2677 true)
2678 .Default(false);
2679}
2680
2681bool FunctionDecl::isReservedGlobalPlacementOperator() const {
2682 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 2682, __extension__ __PRETTY_FUNCTION__))
;
2683 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 2686, __extension__ __PRETTY_FUNCTION__))
2684 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 2686, __extension__ __PRETTY_FUNCTION__))
2685 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 2686, __extension__ __PRETTY_FUNCTION__))
2686 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 2686, __extension__ __PRETTY_FUNCTION__))
;
2687
2688 if (!getDeclContext()->getRedeclContext()->isTranslationUnit())
2689 return false;
2690
2691 const auto *proto = getType()->castAs<FunctionProtoType>();
2692 if (proto->getNumParams() != 2 || proto->isVariadic())
2693 return false;
2694
2695 ASTContext &Context =
2696 cast<TranslationUnitDecl>(getDeclContext()->getRedeclContext())
2697 ->getASTContext();
2698
2699 // The result type and first argument type are constant across all
2700 // these operators. The second argument must be exactly void*.
2701 return (proto->getParamType(1).getCanonicalType() == Context.VoidPtrTy);
2702}
2703
2704bool FunctionDecl::isReplaceableGlobalAllocationFunction(bool *IsAligned) const {
2705 if (getDeclName().getNameKind() != DeclarationName::CXXOperatorName)
2706 return false;
2707 if (getDeclName().getCXXOverloadedOperator() != OO_New &&
2708 getDeclName().getCXXOverloadedOperator() != OO_Delete &&
2709 getDeclName().getCXXOverloadedOperator() != OO_Array_New &&
2710 getDeclName().getCXXOverloadedOperator() != OO_Array_Delete)
2711 return false;
2712
2713 if (isa<CXXRecordDecl>(getDeclContext()))
2714 return false;
2715
2716 // This can only fail for an invalid 'operator new' declaration.
2717 if (!getDeclContext()->getRedeclContext()->isTranslationUnit())
2718 return false;
2719
2720 const auto *FPT = getType()->castAs<FunctionProtoType>();
2721 if (FPT->getNumParams() == 0 || FPT->getNumParams() > 3 || FPT->isVariadic())
2722 return false;
2723
2724 // If this is a single-parameter function, it must be a replaceable global
2725 // allocation or deallocation function.
2726 if (FPT->getNumParams() == 1)
2727 return true;
2728
2729 unsigned Params = 1;
2730 QualType Ty = FPT->getParamType(Params);
2731 ASTContext &Ctx = getASTContext();
2732
2733 auto Consume = [&] {
2734 ++Params;
2735 Ty = Params < FPT->getNumParams() ? FPT->getParamType(Params) : QualType();
2736 };
2737
2738 // In C++14, the next parameter can be a 'std::size_t' for sized delete.
2739 bool IsSizedDelete = false;
2740 if (Ctx.getLangOpts().SizedDeallocation &&
2741 (getDeclName().getCXXOverloadedOperator() == OO_Delete ||
2742 getDeclName().getCXXOverloadedOperator() == OO_Array_Delete) &&
2743 Ctx.hasSameType(Ty, Ctx.getSizeType())) {
2744 IsSizedDelete = true;
2745 Consume();
2746 }
2747
2748 // In C++17, the next parameter can be a 'std::align_val_t' for aligned
2749 // new/delete.
2750 if (Ctx.getLangOpts().AlignedAllocation && !Ty.isNull() && Ty->isAlignValT()) {
2751 if (IsAligned)
2752 *IsAligned = true;
2753 Consume();
2754 }
2755
2756 // Finally, if this is not a sized delete, the final parameter can
2757 // be a 'const std::nothrow_t&'.
2758 if (!IsSizedDelete && !Ty.isNull() && Ty->isReferenceType()) {
2759 Ty = Ty->getPointeeType();
2760 if (Ty.getCVRQualifiers() != Qualifiers::Const)
2761 return false;
2762 const CXXRecordDecl *RD = Ty->getAsCXXRecordDecl();
2763 if (RD && isNamed(RD, "nothrow_t") && RD->isInStdNamespace())
2764 Consume();
2765 }
2766
2767 return Params == FPT->getNumParams();
2768}
2769
2770bool FunctionDecl::isDestroyingOperatorDelete() const {
2771 // C++ P0722:
2772 // Within a class C, a single object deallocation function with signature
2773 // (T, std::destroying_delete_t, <more params>)
2774 // is a destroying operator delete.
2775 if (!isa<CXXMethodDecl>(this) || getOverloadedOperator() != OO_Delete ||
2776 getNumParams() < 2)
2777 return false;
2778
2779 auto *RD = getParamDecl(1)->getType()->getAsCXXRecordDecl();
2780 return RD && RD->isInStdNamespace() && RD->getIdentifier() &&
2781 RD->getIdentifier()->isStr("destroying_delete_t");
2782}
2783
2784LanguageLinkage FunctionDecl::getLanguageLinkage() const {
2785 return getDeclLanguageLinkage(*this);
2786}
2787
2788bool FunctionDecl::isExternC() const {
2789 return isDeclExternC(*this);
2790}
2791
2792bool FunctionDecl::isInExternCContext() const {
2793 return getLexicalDeclContext()->isExternCContext();
2794}
2795
2796bool FunctionDecl::isInExternCXXContext() const {
2797 return getLexicalDeclContext()->isExternCXXContext();
2798}
2799
2800bool FunctionDecl::isGlobal() const {
2801 if (const auto *Method = dyn_cast<CXXMethodDecl>(this))
2802 return Method->isStatic();
2803
2804 if (getCanonicalDecl()->getStorageClass() == SC_Static)
2805 return false;
2806
2807 for (const DeclContext *DC = getDeclContext();
2808 DC->isNamespace();
2809 DC = DC->getParent()) {
2810 if (const auto *Namespace = cast<NamespaceDecl>(DC)) {
2811 if (!Namespace->getDeclName())
2812 return false;
2813 break;
2814 }
2815 }
2816
2817 return true;
2818}
2819
2820bool FunctionDecl::isNoReturn() const {
2821 if (hasAttr<NoReturnAttr>() || hasAttr<CXX11NoReturnAttr>() ||
2822 hasAttr<C11NoReturnAttr>())
2823 return true;
2824
2825 if (auto *FnTy = getType()->getAs<FunctionType>())
2826 return FnTy->getNoReturnAttr();
2827
2828 return false;
2829}
2830
2831void
2832FunctionDecl::setPreviousDeclaration(FunctionDecl *PrevDecl) {
2833 redeclarable_base::setPreviousDecl(PrevDecl);
2834
2835 if (FunctionTemplateDecl *FunTmpl = getDescribedFunctionTemplate()) {
2836 FunctionTemplateDecl *PrevFunTmpl
2837 = PrevDecl? PrevDecl->getDescribedFunctionTemplate() : nullptr;
2838 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 2838, __extension__ __PRETTY_FUNCTION__))
;
2839 FunTmpl->setPreviousDecl(PrevFunTmpl);
2840 }
2841
2842 if (PrevDecl && PrevDecl->IsInline)
2843 IsInline = true;
2844}
2845
2846FunctionDecl *FunctionDecl::getCanonicalDecl() { return getFirstDecl(); }
2847
2848/// \brief Returns a value indicating whether this function
2849/// corresponds to a builtin function.
2850///
2851/// The function corresponds to a built-in function if it is
2852/// declared at translation scope or within an extern "C" block and
2853/// its name matches with the name of a builtin. The returned value
2854/// will be 0 for functions that do not correspond to a builtin, a
2855/// value of type \c Builtin::ID if in the target-independent range
2856/// \c [1,Builtin::First), or a target-specific builtin value.
2857unsigned FunctionDecl::getBuiltinID() const {
2858 if (!getIdentifier())
2859 return 0;
2860
2861 unsigned BuiltinID = getIdentifier()->getBuiltinID();
2862 if (!BuiltinID)
2863 return 0;
2864
2865 ASTContext &Context = getASTContext();
2866 if (Context.getLangOpts().CPlusPlus) {
2867 const auto *LinkageDecl =
2868 dyn_cast<LinkageSpecDecl>(getFirstDecl()->getDeclContext());
2869 // In C++, the first declaration of a builtin is always inside an implicit
2870 // extern "C".
2871 // FIXME: A recognised library function may not be directly in an extern "C"
2872 // declaration, for instance "extern "C" { namespace std { decl } }".
2873 if (!LinkageDecl) {
2874 if (BuiltinID == Builtin::BI__GetExceptionInfo &&
2875 Context.getTargetInfo().getCXXABI().isMicrosoft())
2876 return Builtin::BI__GetExceptionInfo;
2877 return 0;
2878 }
2879 if (LinkageDecl->getLanguage() != LinkageSpecDecl::lang_c)
2880 return 0;
2881 }
2882
2883 // If the function is marked "overloadable", it has a different mangled name
2884 // and is not the C library function.
2885 if (hasAttr<OverloadableAttr>())
2886 return 0;
2887
2888 if (!Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID))
2889 return BuiltinID;
2890
2891 // This function has the name of a known C library
2892 // function. Determine whether it actually refers to the C library
2893 // function or whether it just has the same name.
2894
2895 // If this is a static function, it's not a builtin.
2896 if (getStorageClass() == SC_Static)
2897 return 0;
2898
2899 // OpenCL v1.2 s6.9.f - The library functions defined in
2900 // the C99 standard headers are not available.
2901 if (Context.getLangOpts().OpenCL &&
2902 Context.BuiltinInfo.isPredefinedLibFunction(BuiltinID))
2903 return 0;
2904
2905 // CUDA does not have device-side standard library. printf and malloc are the
2906 // only special cases that are supported by device-side runtime.
2907 if (Context.getLangOpts().CUDA && hasAttr<CUDADeviceAttr>() &&
2908 !hasAttr<CUDAHostAttr>() &&
2909 !(BuiltinID == Builtin::BIprintf || BuiltinID == Builtin::BImalloc))
2910 return 0;
2911
2912 return BuiltinID;
2913}
2914
2915/// getNumParams - Return the number of parameters this function must have
2916/// based on its FunctionType. This is the length of the ParamInfo array
2917/// after it has been created.
2918unsigned FunctionDecl::getNumParams() const {
2919 const auto *FPT = getType()->getAs<FunctionProtoType>();
2920 return FPT ? FPT->getNumParams() : 0;
2921}
2922
2923void FunctionDecl::setParams(ASTContext &C,
2924 ArrayRef<ParmVarDecl *> NewParamInfo) {
2925 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 2925, __extension__ __PRETTY_FUNCTION__))
;
2926 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 2926, __extension__ __PRETTY_FUNCTION__))
;
2927
2928 // Zero params -> null pointer.
2929 if (!NewParamInfo.empty()) {
2930 ParamInfo = new (C) ParmVarDecl*[NewParamInfo.size()];
2931 std::copy(NewParamInfo.begin(), NewParamInfo.end(), ParamInfo);
2932 }
2933}
2934
2935/// getMinRequiredArguments - Returns the minimum number of arguments
2936/// needed to call this function. This may be fewer than the number of
2937/// function parameters, if some of the parameters have default
2938/// arguments (in C++) or are parameter packs (C++11).
2939unsigned FunctionDecl::getMinRequiredArguments() const {
2940 if (!getASTContext().getLangOpts().CPlusPlus)
2941 return getNumParams();
2942
2943 unsigned NumRequiredArgs = 0;
2944 for (auto *Param : parameters())
2945 if (!Param->isParameterPack() && !Param->hasDefaultArg())
2946 ++NumRequiredArgs;
2947 return NumRequiredArgs;
2948}
2949
2950/// \brief The combination of the extern and inline keywords under MSVC forces
2951/// the function to be required.
2952///
2953/// Note: This function assumes that we will only get called when isInlined()
2954/// would return true for this FunctionDecl.
2955bool FunctionDecl::isMSExternInline() const {
2956 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 2956, __extension__ __PRETTY_FUNCTION__))
;
2957
2958 const ASTContext &Context = getASTContext();
2959 if (!Context.getTargetInfo().getCXXABI().isMicrosoft() &&
2960 !hasAttr<DLLExportAttr>())
2961 return false;
2962
2963 for (const FunctionDecl *FD = getMostRecentDecl(); FD;
2964 FD = FD->getPreviousDecl())
2965 if (!FD->isImplicit() && FD->getStorageClass() == SC_Extern)
2966 return true;
2967
2968 return false;
2969}
2970
2971static bool redeclForcesDefMSVC(const FunctionDecl *Redecl) {
2972 if (Redecl->getStorageClass() != SC_Extern)
2973 return false;
2974
2975 for (const FunctionDecl *FD = Redecl->getPreviousDecl(); FD;
2976 FD = FD->getPreviousDecl())
2977 if (!FD->isImplicit() && FD->getStorageClass() == SC_Extern)
2978 return false;
2979
2980 return true;
2981}
2982
2983static bool RedeclForcesDefC99(const FunctionDecl *Redecl) {
2984 // Only consider file-scope declarations in this test.
2985 if (!Redecl->getLexicalDeclContext()->isTranslationUnit())
2986 return false;
2987
2988 // Only consider explicit declarations; the presence of a builtin for a
2989 // libcall shouldn't affect whether a definition is externally visible.
2990 if (Redecl->isImplicit())
2991 return false;
2992
2993 if (!Redecl->isInlineSpecified() || Redecl->getStorageClass() == SC_Extern)
2994 return true; // Not an inline definition
2995
2996 return false;
2997}
2998
2999/// \brief For a function declaration in C or C++, determine whether this
3000/// declaration causes the definition to be externally visible.
3001///
3002/// For instance, this determines if adding the current declaration to the set
3003/// of redeclarations of the given functions causes
3004/// isInlineDefinitionExternallyVisible to change from false to true.
3005bool FunctionDecl::doesDeclarationForceExternallyVisibleDefinition() const {
3006 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 3007, __extension__ __PRETTY_FUNCTION__))
3007 "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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 3007, __extension__ __PRETTY_FUNCTION__))
;
3008
3009 ASTContext &Context = getASTContext();
3010
3011 if (Context.getLangOpts().MSVCCompat) {
3012 const FunctionDecl *Definition;
3013 if (hasBody(Definition) && Definition->isInlined() &&
3014 redeclForcesDefMSVC(this))
3015 return true;
3016 }
3017
3018 if (Context.getLangOpts().GNUInline || hasAttr<GNUInlineAttr>()) {
3019 // With GNU inlining, a declaration with 'inline' but not 'extern', forces
3020 // an externally visible definition.
3021 //
3022 // FIXME: What happens if gnu_inline gets added on after the first
3023 // declaration?
3024 if (!isInlineSpecified() || getStorageClass() == SC_Extern)
3025 return false;
3026
3027 const FunctionDecl *Prev = this;
3028 bool FoundBody = false;
3029 while ((Prev = Prev->getPreviousDecl())) {
3030 FoundBody |= Prev->Body.isValid();
3031
3032 if (Prev->Body) {
3033 // If it's not the case that both 'inline' and 'extern' are
3034 // specified on the definition, then it is always externally visible.
3035 if (!Prev->isInlineSpecified() ||
3036 Prev->getStorageClass() != SC_Extern)
3037 return false;
3038 } else if (Prev->isInlineSpecified() &&
3039 Prev->getStorageClass() != SC_Extern) {
3040 return false;
3041 }
3042 }
3043 return FoundBody;
3044 }
3045
3046 if (Context.getLangOpts().CPlusPlus)
3047 return false;
3048
3049 // C99 6.7.4p6:
3050 // [...] If all of the file scope declarations for a function in a
3051 // translation unit include the inline function specifier without extern,
3052 // then the definition in that translation unit is an inline definition.
3053 if (isInlineSpecified() && getStorageClass() != SC_Extern)
3054 return false;
3055 const FunctionDecl *Prev = this;
3056 bool FoundBody = false;
3057 while ((Prev = Prev->getPreviousDecl())) {
3058 FoundBody |= Prev->Body.isValid();
3059 if (RedeclForcesDefC99(Prev))
3060 return false;
3061 }
3062 return FoundBody;
3063}
3064
3065SourceRange FunctionDecl::getReturnTypeSourceRange() const {
3066 const TypeSourceInfo *TSI = getTypeSourceInfo();
3067 if (!TSI)
3068 return SourceRange();
3069 FunctionTypeLoc FTL =
3070 TSI->getTypeLoc().IgnoreParens().getAs<FunctionTypeLoc>();
3071 if (!FTL)
3072 return SourceRange();
3073
3074 // Skip self-referential return types.
3075 const SourceManager &SM = getASTContext().getSourceManager();
3076 SourceRange RTRange = FTL.getReturnLoc().getSourceRange();
3077 SourceLocation Boundary = getNameInfo().getLocStart();
3078 if (RTRange.isInvalid() || Boundary.isInvalid() ||
3079 !SM.isBeforeInTranslationUnit(RTRange.getEnd(), Boundary))
3080 return SourceRange();
3081
3082 return RTRange;
3083}
3084
3085SourceRange FunctionDecl::getExceptionSpecSourceRange() const {
3086 const TypeSourceInfo *TSI = getTypeSourceInfo();
3087 if (!TSI)
3088 return SourceRange();
3089 FunctionTypeLoc FTL =
3090 TSI->getTypeLoc().IgnoreParens().getAs<FunctionTypeLoc>();
3091 if (!FTL)
3092 return SourceRange();
3093
3094 return FTL.getExceptionSpecRange();
3095}
3096
3097const Attr *FunctionDecl::getUnusedResultAttr() const {
3098 QualType RetType = getReturnType();
3099 if (RetType->isRecordType()) {
3100 if (const auto *Ret =
3101 dyn_cast_or_null<RecordDecl>(RetType->getAsTagDecl())) {
3102 if (const auto *R = Ret->getAttr<WarnUnusedResultAttr>())
3103 return R;
3104 }
3105 } else if (const auto *ET = RetType->getAs<EnumType>()) {
3106 if (const EnumDecl *ED = ET->getDecl()) {
3107 if (const auto *R = ED->getAttr<WarnUnusedResultAttr>())
3108 return R;
3109 }
3110 }
3111 return getAttr<WarnUnusedResultAttr>();
3112}
3113
3114/// \brief For an inline function definition in C, or for a gnu_inline function
3115/// in C++, determine whether the definition will be externally visible.
3116///
3117/// Inline function definitions are always available for inlining optimizations.
3118/// However, depending on the language dialect, declaration specifiers, and
3119/// attributes, the definition of an inline function may or may not be
3120/// "externally" visible to other translation units in the program.
3121///
3122/// In C99, inline definitions are not externally visible by default. However,
3123/// if even one of the global-scope declarations is marked "extern inline", the
3124/// inline definition becomes externally visible (C99 6.7.4p6).
3125///
3126/// In GNU89 mode, or if the gnu_inline attribute is attached to the function
3127/// definition, we use the GNU semantics for inline, which are nearly the
3128/// opposite of C99 semantics. In particular, "inline" by itself will create
3129/// an externally visible symbol, but "extern inline" will not create an
3130/// externally visible symbol.
3131bool FunctionDecl::isInlineDefinitionExternallyVisible() const {
3132 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 3133, __extension__ __PRETTY_FUNCTION__))
3133 "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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 3133, __extension__ __PRETTY_FUNCTION__))
;
3134 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 3134, __extension__ __PRETTY_FUNCTION__))
;
3135 ASTContext &Context = getASTContext();
3136
3137 if (Context.getLangOpts().GNUInline || hasAttr<GNUInlineAttr>()) {
3138 // Note: If you change the logic here, please change
3139 // doesDeclarationForceExternallyVisibleDefinition as well.
3140 //
3141 // If it's not the case that both 'inline' and 'extern' are
3142 // specified on the definition, then this inline definition is
3143 // externally visible.
3144 if (!(isInlineSpecified() && getStorageClass() == SC_Extern))
3145 return true;
3146
3147 // If any declaration is 'inline' but not 'extern', then this definition
3148 // is externally visible.
3149 for (auto Redecl : redecls()) {
3150 if (Redecl->isInlineSpecified() &&
3151 Redecl->getStorageClass() != SC_Extern)
3152 return true;
3153 }
3154
3155 return false;
3156 }
3157
3158 // The rest of this function is C-only.
3159 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 3160, __extension__ __PRETTY_FUNCTION__))
3160 "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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 3160, __extension__ __PRETTY_FUNCTION__))
;
3161
3162 // C99 6.7.4p6:
3163 // [...] If all of the file scope declarations for a function in a
3164 // translation unit include the inline function specifier without extern,
3165 // then the definition in that translation unit is an inline definition.
3166 for (auto Redecl : redecls()) {
3167 if (RedeclForcesDefC99(Redecl))
3168 return true;
3169 }
3170
3171 // C99 6.7.4p6:
3172 // An inline definition does not provide an external definition for the
3173 // function, and does not forbid an external definition in another
3174 // translation unit.
3175 return false;
3176}
3177
3178/// getOverloadedOperator - Which C++ overloaded operator this
3179/// function represents, if any.
3180OverloadedOperatorKind FunctionDecl::getOverloadedOperator() const {
3181 if (getDeclName().getNameKind() == DeclarationName::CXXOperatorName)
3182 return getDeclName().getCXXOverloadedOperator();
3183 else
3184 return OO_None;
3185}
3186
3187/// getLiteralIdentifier - The literal suffix identifier this function
3188/// represents, if any.
3189const IdentifierInfo *FunctionDecl::getLiteralIdentifier() const {
3190 if (getDeclName().getNameKind() == DeclarationName::CXXLiteralOperatorName)
3191 return getDeclName().getCXXLiteralIdentifier();
3192 else
3193 return nullptr;
3194}
3195
3196FunctionDecl::TemplatedKind FunctionDecl::getTemplatedKind() const {
3197 if (TemplateOrSpecialization.isNull())
3198 return TK_NonTemplate;
3199 if (TemplateOrSpecialization.is<FunctionTemplateDecl *>())
3200 return TK_FunctionTemplate;
3201 if (TemplateOrSpecialization.is<MemberSpecializationInfo *>())
3202 return TK_MemberSpecialization;
3203 if (TemplateOrSpecialization.is<FunctionTemplateSpecializationInfo *>())
3204 return TK_FunctionTemplateSpecialization;
3205 if (TemplateOrSpecialization.is
3206 <DependentFunctionTemplateSpecializationInfo*>())
3207 return TK_DependentFunctionTemplateSpecialization;
3208
3209 llvm_unreachable("Did we miss a TemplateOrSpecialization type?")::llvm::llvm_unreachable_internal("Did we miss a TemplateOrSpecialization type?"
, "/build/llvm-toolchain-snapshot-7~svn325118/tools/clang/lib/AST/Decl.cpp"
, 3209)
;
3210}
3211
3212FunctionDecl *FunctionDecl::getInstantiatedFromMemberFunction() const {
3213 if (MemberSpecializationInfo *Info = getMemberSpecializationInfo())
3214 return cast<FunctionDecl>(Info->getInstantiatedFrom());
3215
3216 return nullptr;
3217}
3218
3219MemberSpecializationInfo *FunctionDecl::getMemberSpecializationInfo() const {
3220 return TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo *>();
3221}
3222
3223void
3224FunctionDecl::setInstantiationOfMemberFunction(ASTContext &C,
3225 FunctionDecl *FD,
3226 TemplateSpecializationKind TSK) {
3227 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 3228, __extension__ __PRETTY_FUNCTION__))
3228 "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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 3228, __extension__ __PRETTY_FUNCTION__))
;
3229 MemberSpecializationInfo *Info
3230 = new (C) MemberSpecializationInfo(FD, TSK);
3231 TemplateOrSpecialization = Info;
3232}
3233
3234FunctionTemplateDecl *FunctionDecl::getDescribedFunctionTemplate() const {
3235 return TemplateOrSpecialization.dyn_cast<FunctionTemplateDecl *>();
3236}
3237
3238void FunctionDecl::setDescribedFunctionTemplate(FunctionTemplateDecl *Template) {
3239 TemplateOrSpecialization = Template;
3240}
3241
3242bool FunctionDecl::isImplicitlyInstantiable() const {
3243 // If the function is invalid, it can't be implicitly instantiated.
3244 if (isInvalidDecl())
3245 return false;
3246
3247 switch (getTemplateSpecializationKind()) {
3248 case TSK_Undeclared:
3249 case TSK_ExplicitInstantiationDefinition:
3250 return false;
3251
3252 case TSK_ImplicitInstantiation:
3253 return true;
3254
3255 // It is possible to instantiate TSK_ExplicitSpecialization kind
3256 // if the FunctionDecl has a class scope specialization pattern.
3257 case TSK_ExplicitSpecialization:
3258 return getClassScopeSpecializationPattern() != nullptr;
3259
3260 case TSK_ExplicitInstantiationDeclaration:
3261 // Handled below.
3262 break;
3263 }
3264
3265 // Find the actual template from which we will instantiate.
3266 const FunctionDecl *PatternDecl = getTemplateInstantiationPattern();
3267 bool HasPattern = false;
3268 if (PatternDecl)
3269 HasPattern = PatternDecl->hasBody(PatternDecl);
3270
3271 // C++0x [temp.explicit]p9:
3272 // Except for inline functions, other explicit instantiation declarations
3273 // have the effect of suppressing the implicit instantiation of the entity
3274 // to which they refer.
3275 if (!HasPattern || !PatternDecl)
3276 return true;
3277
3278 return PatternDecl->isInlined();
3279}
3280
3281bool FunctionDecl::isTemplateInstantiation() const {
3282 switch (getTemplateSpecializationKind()) {
3283 case TSK_Undeclared:
3284 case TSK_ExplicitSpecialization:
3285 return false;
3286 case TSK_ImplicitInstantiation:
3287 case TSK_ExplicitInstantiationDeclaration:
3288 case TSK_ExplicitInstantiationDefinition:
3289 return true;
3290 }
3291 llvm_unreachable("All TSK values handled.")::llvm::llvm_unreachable_internal("All TSK values handled.", "/build/llvm-toolchain-snapshot-7~svn325118/tools/clang/lib/AST/Decl.cpp"
, 3291)
;
3292}
3293
3294FunctionDecl *FunctionDecl::getTemplateInstantiationPattern() const {
3295 // Handle class scope explicit specialization special case.
3296 if (getTemplateSpecializationKind() == TSK_ExplicitSpecialization) {
3297 if (auto *Spec = getClassScopeSpecializationPattern())
3298 return getDefinitionOrSelf(Spec);
3299 return nullptr;
3300 }
3301
3302 // If this is a generic lambda call operator specialization, its
3303 // instantiation pattern is always its primary template's pattern
3304 // even if its primary template was instantiated from another
3305 // member template (which happens with nested generic lambdas).
3306 // Since a lambda's call operator's body is transformed eagerly,
3307 // we don't have to go hunting for a prototype definition template
3308 // (i.e. instantiated-from-member-template) to use as an instantiation
3309 // pattern.
3310
3311 if (isGenericLambdaCallOperatorSpecialization(
3312 dyn_cast<CXXMethodDecl>(this))) {
3313 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 3313, __extension__ __PRETTY_FUNCTION__))
;
3314 return getDefinitionOrSelf(getPrimaryTemplate()->getTemplatedDecl());
3315 }
3316
3317 if (FunctionTemplateDecl *Primary = getPrimaryTemplate()) {
3318 while (Primary->getInstantiatedFromMemberTemplate()) {
3319 // If we have hit a point where the user provided a specialization of
3320 // this template, we're done looking.
3321 if (Primary->isMemberSpecialization())
3322 break;
3323 Primary = Primary->getInstantiatedFromMemberTemplate();
3324 }
3325
3326 return getDefinitionOrSelf(Primary->getTemplatedDecl());
3327 }
3328
3329 if (auto *MFD = getInstantiatedFromMemberFunction())
3330 return getDefinitionOrSelf(MFD);
3331
3332 return nullptr;
3333}
3334
3335FunctionTemplateDecl *FunctionDecl::getPrimaryTemplate() const {
3336 if (FunctionTemplateSpecializationInfo *Info
3337 = TemplateOrSpecialization
3338 .dyn_cast<FunctionTemplateSpecializationInfo*>()) {
3339 return Info->Template.getPointer();
3340 }
3341 return nullptr;
3342}
3343
3344FunctionDecl *FunctionDecl::getClassScopeSpecializationPattern() const {
3345 return getASTContext().getClassScopeSpecializationPattern(this);
3346}
3347
3348FunctionTemplateSpecializationInfo *
3349FunctionDecl::getTemplateSpecializationInfo() const {
3350 return TemplateOrSpecialization
3351 .dyn_cast<FunctionTemplateSpecializationInfo *>();
3352}
3353
3354const TemplateArgumentList *
3355FunctionDecl::getTemplateSpecializationArgs() const {
3356 if (FunctionTemplateSpecializationInfo *Info
3357 = TemplateOrSpecialization
3358 .dyn_cast<FunctionTemplateSpecializationInfo*>()) {
3359 return Info->TemplateArguments;
3360 }
3361 return nullptr;
3362}
3363
3364const ASTTemplateArgumentListInfo *
3365FunctionDecl::getTemplateSpecializationArgsAsWritten() const {
3366 if (FunctionTemplateSpecializationInfo *Info
3367 = TemplateOrSpecialization
3368 .dyn_cast<FunctionTemplateSpecializationInfo*>()) {
3369 return Info->TemplateArgumentsAsWritten;
3370 }
3371 return nullptr;
3372}
3373
3374void
3375FunctionDecl::setFunctionTemplateSpecialization(ASTContext &C,
3376 FunctionTemplateDecl *Template,
3377 const TemplateArgumentList *TemplateArgs,
3378 void *InsertPos,
3379 TemplateSpecializationKind TSK,
3380 const TemplateArgumentListInfo *TemplateArgsAsWritten,
3381 SourceLocation PointOfInstantiation) {
3382 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 3383, __extension__ __PRETTY_FUNCTION__))
3383 "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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 3383, __extension__ __PRETTY_FUNCTION__))
;
3384 FunctionTemplateSpecializationInfo *Info
3385 = TemplateOrSpecialization.dyn_cast<FunctionTemplateSpecializationInfo*>();
3386 if (!Info)
3387 Info = FunctionTemplateSpecializationInfo::Create(C, this, Template, TSK,
3388 TemplateArgs,
3389 TemplateArgsAsWritten,
3390 PointOfInstantiation);
3391 TemplateOrSpecialization = Info;
3392 Template->addSpecialization(Info, InsertPos);
3393}
3394
3395void
3396FunctionDecl::setDependentTemplateSpecialization(ASTContext &Context,
3397 const UnresolvedSetImpl &Templates,
3398 const TemplateArgumentListInfo &TemplateArgs) {
3399 assert(TemplateOrSpecialization.isNull())(static_cast <bool> (TemplateOrSpecialization.isNull())
? void (0) : __assert_fail ("TemplateOrSpecialization.isNull()"
, "/build/llvm-toolchain-snapshot-7~svn325118/tools/clang/lib/AST/Decl.cpp"
, 3399, __extension__ __PRETTY_FUNCTION__))
;
3400 DependentFunctionTemplateSpecializationInfo *Info =
3401 DependentFunctionTemplateSpecializationInfo::Create(Context, Templates,
3402 TemplateArgs);
3403 TemplateOrSpecialization = Info;
3404}
3405
3406DependentFunctionTemplateSpecializationInfo *
3407FunctionDecl::getDependentSpecializationInfo() const {
3408 return TemplateOrSpecialization
3409 .dyn_cast<DependentFunctionTemplateSpecializationInfo *>();
3410}
3411
3412DependentFunctionTemplateSpecializationInfo *
3413DependentFunctionTemplateSpecializationInfo::Create(
3414 ASTContext &Context, const UnresolvedSetImpl &Ts,
3415 const TemplateArgumentListInfo &TArgs) {
3416 void *Buffer = Context.Allocate(
3417 totalSizeToAlloc<TemplateArgumentLoc, FunctionTemplateDecl *>(
3418 TArgs.size(), Ts.size()));
3419 return new (Buffer) DependentFunctionTemplateSpecializationInfo(Ts, TArgs);
3420}
3421
3422DependentFunctionTemplateSpecializationInfo::
3423DependentFunctionTemplateSpecializationInfo(const UnresolvedSetImpl &Ts,
3424 const TemplateArgumentListInfo &TArgs)
3425 : AngleLocs(TArgs.getLAngleLoc(), TArgs.getRAngleLoc()) {
3426 NumTemplates = Ts.size();
3427 NumArgs = TArgs.size();
3428
3429 FunctionTemplateDecl **TsArray = getTrailingObjects<FunctionTemplateDecl *>();
3430 for (unsigned I = 0, E = Ts.size(); I != E; ++I)
3431 TsArray[I] = cast<FunctionTemplateDecl>(Ts[I]->getUnderlyingDecl());
3432
3433 TemplateArgumentLoc *ArgsArray = getTrailingObjects<TemplateArgumentLoc>();
3434 for (unsigned I = 0, E = TArgs.size(); I != E; ++I)
3435 new (&ArgsArray[I]) TemplateArgumentLoc(TArgs[I]);
3436}
3437
3438TemplateSpecializationKind FunctionDecl::getTemplateSpecializationKind() const {
3439 // For a function template specialization, query the specialization
3440 // information object.
3441 FunctionTemplateSpecializationInfo *FTSInfo
3442 = TemplateOrSpecialization.dyn_cast<FunctionTemplateSpecializationInfo*>();
3443 if (FTSInfo)
3444 return FTSInfo->getTemplateSpecializationKind();
3445
3446 MemberSpecializationInfo *MSInfo
3447 = TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo*>();
3448 if (MSInfo)
3449 return MSInfo->getTemplateSpecializationKind();
3450
3451 return TSK_Undeclared;
3452}
3453
3454void
3455FunctionDecl::setTemplateSpecializationKind(TemplateSpecializationKind TSK,
3456 SourceLocation PointOfInstantiation) {
3457 if (FunctionTemplateSpecializationInfo *FTSInfo
3458 = TemplateOrSpecialization.dyn_cast<
3459 FunctionTemplateSpecializationInfo*>()) {
3460 FTSInfo->setTemplateSpecializationKind(TSK);
3461 if (TSK != TSK_ExplicitSpecialization &&
3462 PointOfInstantiation.isValid() &&
3463 FTSInfo->getPointOfInstantiation().isInvalid()) {
3464 FTSInfo->setPointOfInstantiation(PointOfInstantiation);
3465 if (ASTMutationListener *L = getASTContext().getASTMutationListener())
3466 L->InstantiationRequested(this);
3467 }
3468 } else if (MemberSpecializationInfo *MSInfo
3469 = TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo*>()) {
3470 MSInfo->setTemplateSpecializationKind(TSK);
3471 if (TSK != TSK_ExplicitSpecialization &&
3472 PointOfInstantiation.isValid() &&
3473 MSInfo->getPointOfInstantiation().isInvalid()) {
3474 MSInfo->setPointOfInstantiation(PointOfInstantiation);
3475 if (ASTMutationListener *L = getASTContext().getASTMutationListener())
3476 L->InstantiationRequested(this);
3477 }
3478 } else
3479 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 3479)
;
3480}
3481
3482SourceLocation FunctionDecl::getPointOfInstantiation() const {
3483 if (FunctionTemplateSpecializationInfo *FTSInfo
3484 = TemplateOrSpecialization.dyn_cast<
3485 FunctionTemplateSpecializationInfo*>())
3486 return FTSInfo->getPointOfInstantiation();
3487 else if (MemberSpecializationInfo *MSInfo
3488 = TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo*>())
3489 return MSInfo->getPointOfInstantiation();
3490
3491 return SourceLocation();
3492}
3493
3494bool FunctionDecl::isOutOfLine() const {
3495 if (Decl::isOutOfLine())
3496 return true;
3497
3498 // If this function was instantiated from a member function of a
3499 // class template, check whether that member function was defined out-of-line.
3500 if (FunctionDecl *FD = getInstantiatedFromMemberFunction()) {
3501 const FunctionDecl *Definition;
3502 if (FD->hasBody(Definition))
3503 return Definition->isOutOfLine();
3504 }
3505
3506 // If this function was instantiated from a function template,
3507 // check whether that function template was defined out-of-line.
3508 if (FunctionTemplateDecl *FunTmpl = getPrimaryTemplate()) {
3509 const FunctionDecl *Definition;
3510 if (FunTmpl->getTemplatedDecl()->hasBody(Definition))
3511 return Definition->isOutOfLine();
3512 }
3513
3514 return false;
3515}
3516
3517SourceRange FunctionDecl::getSourceRange() const {
3518 return SourceRange(getOuterLocStart(), EndRangeLoc);
3519}
3520
3521unsigned FunctionDecl::getMemoryFunctionKind() const {
3522 IdentifierInfo *FnInfo = getIdentifier();
3523
3524 if (!FnInfo)
3525 return 0;
3526
3527 // Builtin handling.
3528 switch (getBuiltinID()) {
3529 case Builtin::BI__builtin_memset:
3530 case Builtin::BI__builtin___memset_chk:
3531 case Builtin::BImemset:
3532 return Builtin::BImemset;
3533
3534 case Builtin::BI__builtin_memcpy:
3535 case Builtin::BI__builtin___memcpy_chk:
3536 case Builtin::BImemcpy:
3537 return Builtin::BImemcpy;
3538
3539 case Builtin::BI__builtin_memmove:
3540 case Builtin::BI__builtin___memmove_chk:
3541 case Builtin::BImemmove:
3542 return Builtin::BImemmove;
3543
3544// case Builtin::BIstrlcpy:
3545// case Builtin::BI__builtin___strlcpy_chk:
3546// return Builtin::BIstrlcpy;
3547
3548// case Builtin::BIstrlcat:
3549// case Builtin::BI__builtin___strlcat_chk:
3550// return Builtin::BIstrlcat;
3551
3552 case Builtin::BI__builtin_memcmp:
3553 case Builtin::BImemcmp:
3554 return Builtin::BImemcmp;
3555
3556 case Builtin::BI__builtin_strncpy:
3557 case Builtin::BI__builtin___strncpy_chk:
3558 case Builtin::BIstrncpy:
3559 return Builtin::BIstrncpy;
3560
3561 case Builtin::BI__builtin_strncmp:
3562 case Builtin::BIstrncmp:
3563 return Builtin::BIstrncmp;
3564
3565 case Builtin::BI__builtin_strncasecmp:
3566 case Builtin::BIstrncasecmp:
3567 return Builtin::BIstrncasecmp;
3568
3569 case Builtin::BI__builtin_strncat:
3570 case Builtin::BI__builtin___strncat_chk:
3571 case Builtin::BIstrncat:
3572 return Builtin::BIstrncat;
3573
3574 case Builtin::BI__builtin_strndup:
3575 case Builtin::BIstrndup:
3576 return Builtin::BIstrndup;
3577
3578 case Builtin::BI__builtin_strlen:
3579 case Builtin::BIstrlen:
3580 return Builtin::BIstrlen;
3581
3582 case Builtin::BI__builtin_bzero:
3583 case Builtin::BIbzero:
3584 return Builtin::BIbzero;
3585
3586 default:
3587 if (isExternC()) {
3588 if (FnInfo->isStr("memset"))
3589 return Builtin::BImemset;
3590 else if (FnInfo->isStr("memcpy"))
3591 return Builtin::BImemcpy;
3592 else if (FnInfo->isStr("memmove"))
3593 return Builtin::BImemmove;
3594 else if (FnInfo->isStr("memcmp"))
3595 return Builtin::BImemcmp;
3596 else if (FnInfo->isStr("strncpy"))
3597 return Builtin::BIstrncpy;
3598 else if (FnInfo->isStr("strncmp"))
3599 return Builtin::BIstrncmp;
3600 else if (FnInfo->isStr("strncasecmp"))
3601 return Builtin::BIstrncasecmp;
3602 else if (FnInfo->isStr("strncat"))
3603 return Builtin::BIstrncat;
3604 else if (FnInfo->isStr("strndup"))
3605 return Builtin::BIstrndup;
3606 else if (FnInfo->isStr("strlen"))
3607 return Builtin::BIstrlen;
3608 else if (FnInfo->isStr("bzero"))
3609 return Builtin::BIbzero;
3610 }
3611 break;
3612 }
3613 return 0;
3614}
3615
3616unsigned FunctionDecl::getODRHash() {
3617 if (HasODRHash)
3618 return ODRHash;
3619
3620 if (FunctionDecl *Definition = getDefinition()) {
3621 if (Definition != this) {
3622 HasODRHash = true;
3623 ODRHash = Definition->getODRHash();
3624 return ODRHash;
3625 }
3626 }
3627
3628 class ODRHash Hash;
3629 Hash.AddFunctionDecl(this);
3630 HasODRHash = true;
3631 ODRHash = Hash.CalculateHash();
3632 return ODRHash;
3633}
3634
3635//===----------------------------------------------------------------------===//
3636// FieldDecl Implementation
3637//===----------------------------------------------------------------------===//
3638
3639FieldDecl *FieldDecl::Create(const ASTContext &C, DeclContext *DC,
3640 SourceLocation StartLoc, SourceLocation IdLoc,
3641 IdentifierInfo *Id, QualType T,
3642 TypeSourceInfo *TInfo, Expr *BW, bool Mutable,
3643 InClassInitStyle InitStyle) {
3644 return new (C, DC) FieldDecl(Decl::Field, DC, StartLoc, IdLoc, Id, T, TInfo,
3645 BW, Mutable, InitStyle);
3646}
3647
3648FieldDecl *FieldDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
3649 return new (C, ID) FieldDecl(Field, nullptr, SourceLocation(),
3650 SourceLocation(), nullptr, QualType(), nullptr,
3651 nullptr, false, ICIS_NoInit);
3652}
3653
3654bool FieldDecl::isAnonymousStructOrUnion() const {
3655 if (!isImplicit() || getDeclName())
3656 return false;
3657
3658 if (const auto *Record = getType()->getAs<RecordType>())
3659 return Record->getDecl()->isAnonymousStructOrUnion();
3660
3661 return false;
3662}
3663
3664unsigned FieldDecl::getBitWidthValue(const ASTContext &Ctx) const {
3665 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 3665, __extension__ __PRETTY_FUNCTION__))
;
3666 return getBitWidth()->EvaluateKnownConstInt(Ctx).getZExtValue();
3667}
3668
3669unsigned FieldDecl::getFieldIndex() const {
3670 const FieldDecl *Canonical = getCanonicalDecl();
3671 if (Canonical != this)
3672 return Canonical->getFieldIndex();
3673
3674 if (CachedFieldIndex) return CachedFieldIndex - 1;
3675
3676 unsigned Index = 0;
3677 const RecordDecl *RD = getParent()->getDefinition();
3678 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 3678, __extension__ __PRETTY_FUNCTION__))
;
3679
3680 for (auto *Field : RD->fields()) {
3681 Field->getCanonicalDecl()->CachedFieldIndex = Index + 1;
3682 ++Index;
3683 }
3684
3685 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 3685, __extension__ __PRETTY_FUNCTION__))
;
3686 return CachedFieldIndex - 1;
3687}
3688
3689SourceRange FieldDecl::getSourceRange() const {
3690 const Expr *FinalExpr = getInClassInitializer();
3691 if (!FinalExpr)
3692 FinalExpr = getBitWidth();
3693 if (FinalExpr)
3694 return SourceRange(getInnerLocStart(), FinalExpr->getLocEnd());
3695 return DeclaratorDecl::getSourceRange();
3696}
3697
3698void FieldDecl::setCapturedVLAType(const VariableArrayType *VLAType) {
3699 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 3700, __extension__ __PRETTY_FUNCTION__))
3700 "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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 3700, __extension__ __PRETTY_FUNCTION__))
;
3701 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 3703, __extension__ __PRETTY_FUNCTION__))
3702 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 3703, __extension__ __PRETTY_FUNCTION__))
3703 "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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 3703, __extension__ __PRETTY_FUNCTION__))
;
3704 InitStorage.setPointerAndInt(const_cast<VariableArrayType *>(VLAType),
3705 ISK_CapturedVLAType);
3706}
3707
3708//===----------------------------------------------------------------------===//
3709// TagDecl Implementation
3710//===----------------------------------------------------------------------===//
3711
3712SourceLocation TagDecl::getOuterLocStart() const {
3713 return getTemplateOrInnerLocStart(this);
3714}
3715
3716SourceRange TagDecl::getSourceRange() const {
3717 SourceLocation RBraceLoc = BraceRange.getEnd();
3718 SourceLocation E = RBraceLoc.isValid() ? RBraceLoc : getLocation();
3719 return SourceRange(getOuterLocStart(), E);
3720}
3721
3722TagDecl *TagDecl::getCanonicalDecl() { return getFirstDecl(); }
3723
3724void TagDecl::setTypedefNameForAnonDecl(TypedefNameDecl *TDD) {
3725 TypedefNameDeclOrQualifier = TDD;
3726 if (const Type *T = getTypeForDecl()) {
3727 (void)T;
3728 assert(T->isLinkageValid())(static_cast <bool> (T->isLinkageValid()) ? void (0)
: __assert_fail ("T->isLinkageValid()", "/build/llvm-toolchain-snapshot-7~svn325118/tools/clang/lib/AST/Decl.cpp"
, 3728, __extension__ __PRETTY_FUNCTION__))
;
3729 }
3730 assert(isLinkageValid())(static_cast <bool> (isLinkageValid()) ? void (0) : __assert_fail
("isLinkageValid()", "/build/llvm-toolchain-snapshot-7~svn325118/tools/clang/lib/AST/Decl.cpp"
, 3730, __extension__ __PRETTY_FUNCTION__))
;
3731}
3732
3733void TagDecl::startDefinition() {
3734 IsBeingDefined = true;
3735
3736 if (auto *D = dyn_cast<CXXRecordDecl>(this)) {
3737 struct CXXRecordDecl::DefinitionData *Data =
3738 new (getASTContext()) struct CXXRecordDecl::DefinitionData(D);
3739 for (auto I : redecls())
3740 cast<CXXRecordDecl>(I)->DefinitionData = Data;
3741 }
3742}
3743
3744void TagDecl::completeDefinition() {
3745 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 3747, __extension__ __PRETTY_FUNCTION__))
3746 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 3747, __extension__ __PRETTY_FUNCTION__))
3747 "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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 3747, __extension__ __PRETTY_FUNCTION__))
;
3748
3749 IsCompleteDefinition = true;
3750 IsBeingDefined = false;
3751
3752 if (ASTMutationListener *L = getASTMutationListener())
3753 L->CompletedTagDefinition(this);
3754}
3755
3756TagDecl *TagDecl::getDefinition() const {
3757 if (isCompleteDefinition())
3758 return const_cast<TagDecl *>(this);
3759
3760 // If it's possible for us to have an out-of-date definition, check now.
3761 if (MayHaveOutOfDateDef) {
3762 if (IdentifierInfo *II = getIdentifier()) {
3763 if (II->isOutOfDate()) {
3764 updateOutOfDate(*II);
3765 }
3766 }
3767 }
3768
3769 if (const auto *CXXRD = dyn_cast<CXXRecordDecl>(this))
3770 return CXXRD->getDefinition();
3771
3772 for (auto R : redecls())
3773 if (R->isCompleteDefinition())
3774 return R;
3775
3776 return nullptr;
3777}
3778
3779void TagDecl::setQualifierInfo(NestedNameSpecifierLoc QualifierLoc) {
3780 if (QualifierLoc) {
3781 // Make sure the extended qualifier info is allocated.
3782 if (!hasExtInfo())
3783 TypedefNameDeclOrQualifier = new (getASTContext()) ExtInfo;
3784 // Set qualifier info.
3785 getExtInfo()->QualifierLoc = QualifierLoc;
3786 } else {
3787 // Here Qualifier == 0, i.e., we are removing the qualifier (if any).
3788 if (hasExtInfo()) {
3789 if (getExtInfo()->NumTemplParamLists == 0) {
3790 getASTContext().Deallocate(getExtInfo());
3791 TypedefNameDeclOrQualifier = (TypedefNameDecl *)nullptr;
3792 }
3793 else
3794 getExtInfo()->QualifierLoc = QualifierLoc;
3795 }
3796 }
3797}
3798
3799void TagDecl::setTemplateParameterListsInfo(
3800 ASTContext &Context, ArrayRef<TemplateParameterList *> TPLists) {
3801 assert(!TPLists.empty())(static_cast <bool> (!TPLists.empty()) ? void (0) : __assert_fail
("!TPLists.empty()", "/build/llvm-toolchain-snapshot-7~svn325118/tools/clang/lib/AST/Decl.cpp"
, 3801, __extension__ __PRETTY_FUNCTION__))
;
3802 // Make sure the extended decl info is allocated.
3803 if (!hasExtInfo())
3804 // Allocate external info struct.
3805 TypedefNameDeclOrQualifier = new (getASTContext()) ExtInfo;
3806 // Set the template parameter lists info.
3807 getExtInfo()->setTemplateParameterListsInfo(Context, TPLists);
3808}
3809
3810//===----------------------------------------------------------------------===//
3811// EnumDecl Implementation
3812//===----------------------------------------------------------------------===//
3813
3814void EnumDecl::anchor() {}
3815
3816EnumDecl *EnumDecl::Create(ASTContext &C, DeclContext *DC,
3817 SourceLocation StartLoc, SourceLocation IdLoc,
3818 IdentifierInfo *Id,
3819 EnumDecl *PrevDecl, bool IsScoped,
3820 bool IsScopedUsingClassTag, bool IsFixed) {
3821 auto *Enum = new (C, DC) EnumDecl(C, DC, StartLoc, IdLoc, Id, PrevDecl,
3822 IsScoped, IsScopedUsingClassTag, IsFixed);
3823 Enum->MayHaveOutOfDateDef = C.getLangOpts().Modules;
3824 C.getTypeDeclType(Enum, PrevDecl);
3825 return Enum;
3826}
3827
3828EnumDecl *EnumDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
3829 EnumDecl *Enum =
3830 new (C, ID) EnumDecl(C, nullptr, SourceLocation(), SourceLocation(),
3831 nullptr, nullptr, false, false, false);
3832 Enum->MayHaveOutOfDateDef = C.getLangOpts().Modules;
3833 return Enum;
3834}
3835
3836SourceRange EnumDecl::getIntegerTypeRange() const {
3837 if (const TypeSourceInfo *TI = getIntegerTypeSourceInfo())
3838 return TI->getTypeLoc().getSourceRange();
3839 return SourceRange();
3840}
3841
3842void EnumDecl::completeDefinition(QualType NewType,
3843 QualType NewPromotionType,
3844 unsigned NumPositiveBits,
3845 unsigned NumNegativeBits) {
3846 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 3846, __extension__ __PRETTY_FUNCTION__))
;
3847 if (!IntegerType)
3848 IntegerType = NewType.getTypePtr();
3849 PromotionType = NewPromotionType;
3850 setNumPositiveBits(NumPositiveBits);
3851 setNumNegativeBits(NumNegativeBits);
3852 TagDecl::completeDefinition();
3853}
3854
3855bool EnumDecl::isClosed() const {
3856 if (const auto *A = getAttr<EnumExtensibilityAttr>())
3857 return A->getExtensibility() == EnumExtensibilityAttr::Closed;
3858 return true;
3859}
3860
3861bool EnumDecl::isClosedFlag() const {
3862 return isClosed() && hasAttr<FlagEnumAttr>();
3863}
3864
3865bool EnumDecl::isClosedNonFlag() const {
3866 return isClosed() && !hasAttr<FlagEnumAttr>();
3867}
3868
3869TemplateSpecializationKind EnumDecl::getTemplateSpecializationKind() const {
3870 if (MemberSpecializationInfo *MSI = getMemberSpecializationInfo())
3871 return MSI->getTemplateSpecializationKind();
3872
3873 return TSK_Undeclared;
3874}
3875
3876void EnumDecl::setTemplateSpecializationKind(TemplateSpecializationKind TSK,
3877 SourceLocation PointOfInstantiation) {
3878 MemberSpecializationInfo *MSI = getMemberSpecializationInfo();
3879 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 3879, __extension__ __PRETTY_FUNCTION__))
;
3880 MSI->setTemplateSpecializationKind(TSK);
3881 if (TSK != TSK_ExplicitSpecialization &&
3882 PointOfInstantiation.isValid() &&
3883 MSI->getPointOfInstantiation().isInvalid())
3884 MSI->setPointOfInstantiation(PointOfInstantiation);
3885}
3886
3887EnumDecl *EnumDecl::getTemplateInstantiationPattern() const {
3888 if (MemberSpecializationInfo *MSInfo = getMemberSpecializationInfo()) {
3889 if (isTemplateInstantiation(MSInfo->getTemplateSpecializationKind())) {
3890 EnumDecl *ED = getInstantiatedFromMemberEnum();
3891 while (auto *NewED = ED->getInstantiatedFromMemberEnum())
3892 ED = NewED;
3893 return getDefinitionOrSelf(ED);
3894 }
3895 }
3896
3897 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 3898, __extension__ __PRETTY_FUNCTION__))
3898 "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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 3898, __extension__ __PRETTY_FUNCTION__))
;
3899 return nullptr;
3900}
3901
3902EnumDecl *EnumDecl::getInstantiatedFromMemberEnum() const {
3903 if (SpecializationInfo)
3904 return cast<EnumDecl>(SpecializationInfo->getInstantiatedFrom());
3905
3906 return nullptr;
3907}
3908
3909void EnumDecl::setInstantiationOfMemberEnum(ASTContext &C, EnumDecl *ED,
3910 TemplateSpecializationKind TSK) {
3911 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 3911, __extension__ __PRETTY_FUNCTION__))
;
3912 SpecializationInfo = new (C) MemberSpecializationInfo(ED, TSK);
3913}
3914
3915//===----------------------------------------------------------------------===//
3916// RecordDecl Implementation
3917//===----------------------------------------------------------------------===//
3918
3919RecordDecl::RecordDecl(Kind DK, TagKind TK, const ASTContext &C,
3920 DeclContext *DC, SourceLocation StartLoc,
3921 SourceLocation IdLoc, IdentifierInfo *Id,
3922 RecordDecl *PrevDecl)
3923 : TagDecl(DK, TK, C, DC, IdLoc, Id, PrevDecl, StartLoc),
3924 HasFlexibleArrayMember(false), AnonymousStructOrUnion(false),
3925 HasObjectMember(false), HasVolatileMember(false),
3926 LoadedFieldsFromExternalStorage(false) {
3927 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 3927, __extension__ __PRETTY_FUNCTION__))
;
3928}
3929
3930RecordDecl *RecordDecl::Create(const ASTContext &C, TagKind TK, DeclContext *DC,
3931 SourceLocation StartLoc, SourceLocation IdLoc,
3932 IdentifierInfo *Id, RecordDecl* PrevDecl) {
3933 RecordDecl *R = new (C, DC) RecordDecl(Record, TK, C, DC,
3934 StartLoc, IdLoc, Id, PrevDecl);
3935 R->MayHaveOutOfDateDef = C.getLangOpts().Modules;
3936
3937 C.getTypeDeclType(R, PrevDecl);
3938 return R;
3939}
3940
3941RecordDecl *RecordDecl::CreateDeserialized(const ASTContext &C, unsigned ID) {
3942 RecordDecl *R =
3943 new (C, ID) RecordDecl(Record, TTK_Struct, C, nullptr, SourceLocation(),
3944 SourceLocation(), nullptr, nullptr);
3945 R->MayHaveOutOfDateDef = C.getLangOpts().Modules;
3946 return R;
3947}
3948
3949bool RecordDecl::isInjectedClassName() const {
3950 return isImplicit() && getDeclName() && getDeclContext()->isRecord() &&
3951 cast<RecordDecl>(getDeclContext())->getDeclName() == getDeclName();
3952}
3953
3954bool RecordDecl::isLambda() const {
3955 if (auto RD = dyn_cast<CXXRecordDecl>(this))
3956 return RD->isLambda();
3957 return false;
3958}
3959
3960bool RecordDecl::isCapturedRecord() const {
3961 return hasAttr<CapturedRecordAttr>();
3962}
3963
3964void RecordDecl::setCapturedRecord() {
3965 addAttr(CapturedRecordAttr::CreateImplicit(getASTContext()));
3966}
3967
3968RecordDecl::field_iterator RecordDecl::field_begin() const {
3969 if (hasExternalLexicalStorage() && !LoadedFieldsFromExternalStorage)
3970 LoadFieldsFromExternalStorage();
3971
3972 return field_iterator(decl_iterator(FirstDecl));
3973}
3974
3975/// completeDefinition - Notes that the definition of this type is now
3976/// complete.
3977void RecordDecl::completeDefinition() {
3978 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 3978, __extension__ __PRETTY_FUNCTION__))
;
3979 TagDecl::completeDefinition();
3980}
3981
3982/// isMsStruct - Get whether or not this record uses ms_struct layout.
3983/// This which can be turned on with an attribute, pragma, or the
3984/// -mms-bitfields command-line option.
3985bool RecordDecl::isMsStruct(const ASTContext &C) const {
3986 return hasAttr<MSStructAttr>() || C.getLangOpts().MSBitfields == 1;
3987}
3988
3989void RecordDecl::LoadFieldsFromExternalStorage() const {
3990 ExternalASTSource *Source = getASTContext().getExternalSource();
3991 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 3991, __extension__ __PRETTY_FUNCTION__))
;
3992
3993 // Notify that we have a RecordDecl doing some initialization.
3994 ExternalASTSource::Deserializing TheFields(Source);
3995
3996 SmallVector<Decl*, 64> Decls;
3997 LoadedFieldsFromExternalStorage = true;
3998 Source->FindExternalLexicalDecls(this, [](Decl::Kind K) {
3999 return FieldDecl::classofKind(K) || IndirectFieldDecl::classofKind(K);
4000 }, Decls);
4001
4002#ifndef NDEBUG
4003 // Check that all decls we got were FieldDecls.
4004 for (unsigned i=0, e=Decls.size(); i != e; ++i)
4005 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 4005, __extension__ __PRETTY_FUNCTION__))
;
4006#endif
4007
4008 if (Decls.empty())
4009 return;
4010
4011 std::tie(FirstDecl, LastDecl) = BuildDeclChain(Decls,
4012 /*FieldsAlreadyLoaded=*/false);
4013}
4014
4015bool RecordDecl::mayInsertExtraPadding(bool EmitRemark) const {
4016 ASTContext &Context = getASTContext();
4017 const SanitizerMask EnabledAsanMask = Context.getLangOpts().Sanitize.Mask &
4018 (SanitizerKind::Address | SanitizerKind::KernelAddress);
4019 if (!EnabledAsanMask || !Context.getLangOpts().SanitizeAddressFieldPadding)
4020 return false;
4021 const auto &Blacklist = Context.getSanitizerBlacklist();
4022 const auto *CXXRD = dyn_cast<CXXRecordDecl>(this);
4023 // We may be able to relax some of these requirements.
4024 int ReasonToReject = -1;
4025 if (!CXXRD || CXXRD->isExternCContext())
4026 ReasonToReject = 0; // is not C++.
4027 else if (CXXRD->hasAttr<PackedAttr>())
4028 ReasonToReject = 1; // is packed.
4029 else if (CXXRD->isUnion())
4030 ReasonToReject = 2; // is a union.
4031 else if (CXXRD->isTriviallyCopyable())
4032 ReasonToReject = 3; // is trivially copyable.
4033 else if (CXXRD->hasTrivialDestructor())
4034 ReasonToReject = 4; // has trivial destructor.
4035 else if (CXXRD->isStandardLayout())
4036 ReasonToReject = 5; // is standard layout.
4037 else if (Blacklist.isBlacklistedLocation(EnabledAsanMask, getLocation(),
4038 "field-padding"))
4039 ReasonToReject = 6; // is in a blacklisted file.
4040 else if (Blacklist.isBlacklistedType(EnabledAsanMask,
4041 getQualifiedNameAsString(),
4042 "field-padding"))
4043 ReasonToReject = 7; // is blacklisted.
4044
4045 if (EmitRemark) {
4046 if (ReasonToReject >= 0)
4047 Context.getDiagnostics().Report(
4048 getLocation(),
4049 diag::remark_sanitize_address_insert_extra_padding_rejected)
4050 << getQualifiedNameAsString() << ReasonToReject;
4051 else
4052 Context.getDiagnostics().Report(
4053 getLocation(),
4054 diag::remark_sanitize_address_insert_extra_padding_accepted)
4055 << getQualifiedNameAsString();
4056 }
4057 return ReasonToReject < 0;
4058}
4059
4060const FieldDecl *RecordDecl::findFirstNamedDataMember() const {
4061 for (const auto *I : fields()) {
4062 if (I->getIdentifier())
4063 return I;
4064
4065 if (const auto *RT = I->getType()->getAs<RecordType>())
4066 if (const FieldDecl *NamedDataMember =
4067 RT->getDecl()->findFirstNamedDataMember())
4068 return NamedDataMember;
4069 }
4070
4071 // We didn't find a named data member.
4072 return nullptr;
4073}
4074
4075//===----------------------------------------------------------------------===//
4076// BlockDecl Implementation
4077//===----------------------------------------------------------------------===//
4078
4079void BlockDecl::setParams(ArrayRef<ParmVarDecl *> NewParamInfo) {
4080 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 4080, __extension__ __PRETTY_FUNCTION__))
;
4081
4082 // Zero params -> null pointer.
4083 if (!NewParamInfo.empty()) {
4084 NumParams = NewParamInfo.size();
4085 ParamInfo = new (getASTContext()) ParmVarDecl*[NewParamInfo.size()];
4086 std::copy(NewParamInfo.begin(), NewParamInfo.end(), ParamInfo);
4087 }
4088}
4089
4090void BlockDecl::setCaptures(ASTContext &Context, ArrayRef<Capture> Captures,
4091 bool CapturesCXXThis) {
4092 this->CapturesCXXThis = CapturesCXXThis;
4093 this->NumCaptures = Captures.size();
4094
4095 if (Captures.empty()) {
4096 this->Captures = nullptr;
4097 return;
4098 }
4099
4100 this->Captures = Captures.copy(Context).data();
4101}
4102
4103bool BlockDecl::capturesVariable(const VarDecl *variable) const {
4104 for (const auto &I : captures())
4105 // Only auto vars can be captured, so no redeclaration worries.
4106 if (I.getVariable() == variable)
4107 return true;
4108
4109 return false;
4110}
4111
4112SourceRange BlockDecl::getSourceRange() const {
4113 return SourceRange(getLocation(), Body? Body->getLocEnd() : getLocation());
4114}
4115
4116//===----------------------------------------------------------------------===//
4117// Other Decl Allocation/Deallocation Method Implementations
4118//===----------------------------------------------------------------------===//
4119
4120void TranslationUnitDecl::anchor() {}
4121
4122TranslationUnitDecl *TranslationUnitDecl::Create(ASTContext &C) {
4123 return new (C, (DeclContext *)nullptr) TranslationUnitDecl(C);
4124}
4125
4126void PragmaCommentDecl::anchor() {}
4127
4128PragmaCommentDecl *PragmaCommentDecl::Create(const ASTContext &C,
4129 TranslationUnitDecl *DC,
4130 SourceLocation CommentLoc,
4131 PragmaMSCommentKind CommentKind,
4132 StringRef Arg) {
4133 PragmaCommentDecl *PCD =
4134 new (C, DC, additionalSizeToAlloc<char>(Arg.size() + 1))
4135 PragmaCommentDecl(DC, CommentLoc, CommentKind);
4136 memcpy(PCD->getTrailingObjects<char>(), Arg.data(), Arg.size());
4137 PCD->getTrailingObjects<char>()[Arg.size()] = '\0';
4138 return PCD;
4139}
4140
4141PragmaCommentDecl *PragmaCommentDecl::CreateDeserialized(ASTContext &C,
4142 unsigned ID,
4143 unsigned ArgSize) {
4144 return new (C, ID, additionalSizeToAlloc<char>(ArgSize + 1))
4145 PragmaCommentDecl(nullptr, SourceLocation(), PCK_Unknown);
4146}
4147
4148void PragmaDetectMismatchDecl::anchor() {}
4149
4150PragmaDetectMismatchDecl *
4151PragmaDetectMismatchDecl::Create(const ASTContext &C, TranslationUnitDecl *DC,
4152 SourceLocation Loc, StringRef Name,
4153 StringRef Value) {
4154 size_t ValueStart = Name.size() + 1;
4155 PragmaDetectMismatchDecl *PDMD =
4156 new (C, DC, additionalSizeToAlloc<char>(ValueStart + Value.size() + 1))
4157 PragmaDetectMismatchDecl(DC, Loc, ValueStart);
4158 memcpy(PDMD->getTrailingObjects<char>(), Name.data(), Name.size());
4159 PDMD->getTrailingObjects<char>()[Name.size()] = '\0';
4160 memcpy(PDMD->getTrailingObjects<char>() + ValueStart, Value.data(),
4161 Value.size());
4162 PDMD->getTrailingObjects<char>()[ValueStart + Value.size()] = '\0';
4163 return PDMD;
4164}
4165
4166PragmaDetectMismatchDecl *
4167PragmaDetectMismatchDecl::CreateDeserialized(ASTContext &C, unsigned ID,
4168 unsigned NameValueSize) {
4169 return new (C, ID, additionalSizeToAlloc<char>(NameValueSize + 1))
4170 PragmaDetectMismatchDecl(nullptr, SourceLocation(), 0);
4171}
4172
4173void ExternCContextDecl::anchor() {}
4174
4175ExternCContextDecl *ExternCContextDecl::Create(const ASTContext &C,
4176 TranslationUnitDecl *DC) {
4177 return new (C, DC) ExternCContextDecl(DC);
4178}
4179
4180void LabelDecl::anchor() {}
4181
4182LabelDecl *LabelDecl::Create(ASTContext &C, DeclContext *DC,
4183 SourceLocation IdentL, IdentifierInfo *II) {
4184 return new (C, DC) LabelDecl(DC, IdentL, II, nullptr, IdentL);
4185}
4186
4187LabelDecl *LabelDecl::Create(ASTContext &C, DeclContext *DC,
4188 SourceLocation IdentL, IdentifierInfo *II,
4189 SourceLocation GnuLabelL) {
4190 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 4190, __extension__ __PRETTY_FUNCTION__))
;
4191 return new (C, DC) LabelDecl(DC, IdentL, II, nullptr, GnuLabelL);
4192}
4193
4194LabelDecl *LabelDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
4195 return new (C, ID) LabelDecl(nullptr, SourceLocation(), nullptr, nullptr,
4196 SourceLocation());
4197}
4198
4199void LabelDecl::setMSAsmLabel(StringRef Name) {
4200 char *Buffer = new (getASTContext(), 1) char[Name.size() + 1];
1
'Buffer' initialized to a null pointer value
4201 memcpy(Buffer, Name.data(), Name.size());
2
Null pointer passed as an argument to a 'nonnull' parameter
4202 Buffer[Name.size()] = '\0';
4203 MSAsmName = Buffer;
4204}
4205
4206void ValueDecl::anchor() {}
4207
4208bool ValueDecl::isWeak() const {
4209 for (const auto *I : attrs())
4210 if (isa<WeakAttr>(I) || isa<WeakRefAttr>(I))
4211 return true;
4212
4213 return isWeakImported();
4214}
4215
4216void ImplicitParamDecl::anchor() {}
4217
4218ImplicitParamDecl *ImplicitParamDecl::Create(ASTContext &C, DeclContext *DC,
4219 SourceLocation IdLoc,
4220 IdentifierInfo *Id, QualType Type,
4221 ImplicitParamKind ParamKind) {
4222 return new (C, DC) ImplicitParamDecl(C, DC, IdLoc, Id, Type, ParamKind);
4223}
4224
4225ImplicitParamDecl *ImplicitParamDecl::Create(ASTContext &C, QualType Type,
4226 ImplicitParamKind ParamKind) {
4227 return new (C, nullptr) ImplicitParamDecl(C, Type, ParamKind);
4228}
4229
4230ImplicitParamDecl *ImplicitParamDecl::CreateDeserialized(ASTContext &C,
4231 unsigned ID) {
4232 return new (C, ID) ImplicitParamDecl(C, QualType(), ImplicitParamKind::Other);
4233}
4234
4235FunctionDecl *FunctionDecl::Create(ASTContext &C, DeclContext *DC,
4236 SourceLocation StartLoc,
4237 const DeclarationNameInfo &NameInfo,
4238 QualType T, TypeSourceInfo *TInfo,
4239 StorageClass SC,
4240 bool isInlineSpecified,
4241 bool hasWrittenPrototype,
4242 bool isConstexprSpecified) {
4243 FunctionDecl *New =
4244 new (C, DC) FunctionDecl(Function, C, DC, StartLoc, NameInfo, T, TInfo,
4245 SC, isInlineSpecified, isConstexprSpecified);
4246 New->HasWrittenPrototype = hasWrittenPrototype;
4247 return New;
4248}
4249
4250FunctionDecl *FunctionDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
4251 return new (C, ID) FunctionDecl(Function, C, nullptr, SourceLocation(),
4252 DeclarationNameInfo(), QualType(), nullptr,
4253 SC_None, false, false);
4254}
4255
4256BlockDecl *BlockDecl::Create(ASTContext &C, DeclContext *DC, SourceLocation L) {
4257 return new (C, DC) BlockDecl(DC, L);
4258}
4259
4260BlockDecl *BlockDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
4261 return new (C, ID) BlockDecl(nullptr, SourceLocation());
4262}
4263
4264CapturedDecl::CapturedDecl(DeclContext *DC, unsigned NumParams)
4265 : Decl(Captured, DC, SourceLocation()), DeclContext(Captured),
4266 NumParams(NumParams), ContextParam(0), BodyAndNothrow(nullptr, false) {}
4267
4268CapturedDecl *CapturedDecl::Create(ASTContext &C, DeclContext *DC,
4269 unsigned NumParams) {
4270 return new (C, DC, additionalSizeToAlloc<ImplicitParamDecl *>(NumParams))
4271 CapturedDecl(DC, NumParams);
4272}
4273
4274CapturedDecl *CapturedDecl::CreateDeserialized(ASTContext &C, unsigned ID,
4275 unsigned NumParams) {
4276 return new (C, ID, additionalSizeToAlloc<ImplicitParamDecl *>(NumParams))
4277 CapturedDecl(nullptr, NumParams);
4278}
4279
4280Stmt *CapturedDecl::getBody() const { return BodyAndNothrow.getPointer(); }
4281void CapturedDecl::setBody(Stmt *B) { BodyAndNothrow.setPointer(B); }
4282
4283bool CapturedDecl::isNothrow() const { return BodyAndNothrow.getInt(); }
4284void CapturedDecl::setNothrow(bool Nothrow) { BodyAndNothrow.setInt(Nothrow); }
4285
4286EnumConstantDecl *EnumConstantDecl::Create(ASTContext &C, EnumDecl *CD,
4287 SourceLocation L,
4288 IdentifierInfo *Id, QualType T,
4289 Expr *E, const llvm::APSInt &V) {
4290 return new (C, CD) EnumConstantDecl(CD, L, Id, T, E, V);
4291}
4292
4293EnumConstantDecl *
4294EnumConstantDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
4295 return new (C, ID) EnumConstantDecl(nullptr, SourceLocation(), nullptr,
4296 QualType(), nullptr, llvm::APSInt());
4297}
4298
4299void IndirectFieldDecl::anchor() {}
4300
4301IndirectFieldDecl::IndirectFieldDecl(ASTContext &C, DeclContext *DC,
4302 SourceLocation L, DeclarationName N,
4303 QualType T,
4304 MutableArrayRef<NamedDecl *> CH)
4305 : ValueDecl(IndirectField, DC, L, N, T), Chaining(CH.data()),
4306 ChainingSize(CH.size()) {
4307 // In C++, indirect field declarations conflict with tag declarations in the
4308 // same scope, so add them to IDNS_Tag so that tag redeclaration finds them.
4309 if (C.getLangOpts().CPlusPlus)
4310 IdentifierNamespace |= IDNS_Tag;
4311}
4312
4313IndirectFieldDecl *
4314IndirectFieldDecl::Create(ASTContext &C, DeclContext *DC, SourceLocation L,
4315 IdentifierInfo *Id, QualType T,
4316 llvm::MutableArrayRef<NamedDecl *> CH) {
4317 return new (C, DC) IndirectFieldDecl(C, DC, L, Id, T, CH);
4318}
4319
4320IndirectFieldDecl *IndirectFieldDecl::CreateDeserialized(ASTContext &C,
4321 unsigned ID) {
4322 return new (C, ID) IndirectFieldDecl(C, nullptr, SourceLocation(),
4323 DeclarationName(), QualType(), None);
4324}
4325
4326SourceRange EnumConstantDecl::getSourceRange() const {
4327 SourceLocation End = getLocation();
4328 if (Init)
4329 End = Init->getLocEnd();
4330 return SourceRange(getLocation(), End);
4331}
4332
4333void TypeDecl::anchor() {}
4334
4335TypedefDecl *TypedefDecl::Create(ASTContext &C, DeclContext *DC,
4336 SourceLocation StartLoc, SourceLocation IdLoc,
4337 IdentifierInfo *Id, TypeSourceInfo *TInfo) {
4338 return new (C, DC) TypedefDecl(C, DC, StartLoc, IdLoc, Id, TInfo);
4339}
4340
4341void TypedefNameDecl::anchor() {}
4342
4343TagDecl *TypedefNameDecl::getAnonDeclWithTypedefName(bool AnyRedecl) const {
4344 if (auto *TT = getTypeSourceInfo()->getType()->getAs<TagType>()) {
4345 auto *OwningTypedef = TT->getDecl()->getTypedefNameForAnonDecl();
4346 auto *ThisTypedef = this;
4347 if (AnyRedecl && OwningTypedef) {
4348 OwningTypedef = OwningTypedef->getCanonicalDecl();
4349 ThisTypedef = ThisTypedef->getCanonicalDecl();
4350 }
4351 if (OwningTypedef == ThisTypedef)
4352 return TT->getDecl();
4353 }
4354
4355 return nullptr;
4356}
4357
4358bool TypedefNameDecl::isTransparentTagSlow() const {
4359 auto determineIsTransparent = [&]() {
4360 if (auto *TT = getUnderlyingType()->getAs<TagType>()) {
4361 if (auto *TD = TT->getDecl()) {
4362 if (TD->getName() != getName())
4363 return false;
4364 SourceLocation TTLoc = getLocation();
4365 SourceLocation TDLoc = TD->getLocation();
4366 if (!TTLoc.isMacroID() || !TDLoc.isMacroID())
4367 return false;
4368 SourceManager &SM = getASTContext().getSourceManager();
4369 return SM.getSpellingLoc(TTLoc) == SM.getSpellingLoc(TDLoc);
4370 }
4371 }
4372 return false;
4373 };
4374
4375 bool isTransparent = determineIsTransparent();
4376 MaybeModedTInfo.setInt((isTransparent << 1) | 1);
4377 return isTransparent;
4378}
4379
4380TypedefDecl *TypedefDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
4381 return new (C, ID) TypedefDecl(C, nullptr, SourceLocation(), SourceLocation(),
4382 nullptr, nullptr);
4383}
4384
4385TypeAliasDecl *TypeAliasDecl::Create(ASTContext &C, DeclContext *DC,
4386 SourceLocation StartLoc,
4387 SourceLocation IdLoc, IdentifierInfo *Id,
4388 TypeSourceInfo *TInfo) {
4389 return new (C, DC) TypeAliasDecl(C, DC, StartLoc, IdLoc, Id, TInfo);
4390}
4391
4392TypeAliasDecl *TypeAliasDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
4393 return new (C, ID) TypeAliasDecl(C, nullptr, SourceLocation(),
4394 SourceLocation(), nullptr, nullptr);
4395}
4396
4397SourceRange TypedefDecl::getSourceRange() const {
4398 SourceLocation RangeEnd = getLocation();
4399 if (TypeSourceInfo *TInfo = getTypeSourceInfo()) {
4400 if (typeIsPostfix(TInfo->getType()))
4401 RangeEnd = TInfo->getTypeLoc().getSourceRange().getEnd();
4402 }
4403 return SourceRange(getLocStart(), RangeEnd);
4404}
4405
4406SourceRange TypeAliasDecl::getSourceRange() const {
4407 SourceLocation RangeEnd = getLocStart();
4408 if (TypeSourceInfo *TInfo = getTypeSourceInfo())
4409 RangeEnd = TInfo->getTypeLoc().getSourceRange().getEnd();
4410 return SourceRange(getLocStart(), RangeEnd);
4411}
4412
4413void FileScopeAsmDecl::anchor() {}
4414
4415FileScopeAsmDecl *FileScopeAsmDecl::Create(ASTContext &C, DeclContext *DC,
4416 StringLiteral *Str,
4417 SourceLocation AsmLoc,
4418 SourceLocation RParenLoc) {
4419 return new (C, DC) FileScopeAsmDecl(DC, Str, AsmLoc, RParenLoc);
4420}
4421
4422FileScopeAsmDecl *FileScopeAsmDecl::CreateDeserialized(ASTContext &C,
4423 unsigned ID) {
4424 return new (C, ID) FileScopeAsmDecl(nullptr, nullptr, SourceLocation(),
4425 SourceLocation());
4426}
4427
4428void EmptyDecl::anchor() {}
4429
4430EmptyDecl *EmptyDecl::Create(ASTContext &C, DeclContext *DC, SourceLocation L) {
4431 return new (C, DC) EmptyDecl(DC, L);
4432}
4433
4434EmptyDecl *EmptyDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
4435 return new (C, ID) EmptyDecl(nullptr, SourceLocation());
4436}
4437
4438//===----------------------------------------------------------------------===//
4439// ImportDecl Implementation
4440//===----------------------------------------------------------------------===//
4441
4442/// \brief Retrieve the number of module identifiers needed to name the given
4443/// module.
4444static unsigned getNumModuleIdentifiers(Module *Mod) {
4445 unsigned Result = 1;
4446 while (Mod->Parent) {
4447 Mod = Mod->Parent;
4448 ++Result;
4449 }
4450 return Result;
4451}
4452
4453ImportDecl::ImportDecl(DeclContext *DC, SourceLocation StartLoc,
4454 Module *Imported,
4455 ArrayRef<SourceLocation> IdentifierLocs)
4456 : Decl(Import, DC, StartLoc), ImportedAndComplete(Imported, true) {
4457 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~svn325118/tools/clang/lib/AST/Decl.cpp"
, 4457, __extension__ __PRETTY_FUNCTION__))
;
4458 auto *StoredLocs = getTrailingObjects<SourceLocation>();
4459 std::uninitialized_copy(IdentifierLocs.begin(), IdentifierLocs.end(),
4460 StoredLocs);
4461}
4462
4463ImportDecl::ImportDecl(DeclContext *DC, SourceLocation StartLoc,
4464 Module *Imported, SourceLocation EndLoc)
4465 : Decl(Import, DC, StartLoc), ImportedAndComplete(Imported, false) {
4466 *getTrailingObjects<SourceLocation>() = EndLoc;
4467}
4468
4469ImportDecl *ImportDecl::Create(ASTContext &C, DeclContext *DC,
4470 SourceLocation StartLoc, Module *Imported,
4471 ArrayRef<SourceLocation> IdentifierLocs) {
4472 return new (C, DC,
4473 additionalSizeToAlloc<SourceLocation>(IdentifierLocs.size()))
4474 ImportDecl(DC, StartLoc, Imported, IdentifierLocs);
4475}
4476
4477ImportDecl *ImportDecl::CreateImplicit(ASTContext &C, DeclContext *DC,
4478 SourceLocation StartLoc,
4479 Module *Imported,
4480 SourceLocation EndLoc) {
4481 ImportDecl *Import = new (C, DC, additionalSizeToAlloc<SourceLocation>(1))
4482 ImportDecl(DC, StartLoc, Imported, EndLoc);
4483 Import->setImplicit();
4484 return Import;
4485}
4486
4487ImportDecl *ImportDecl::CreateDeserialized(ASTContext &C, unsigned ID,
4488 unsigned NumLocations) {
4489 return new (C, ID, additionalSizeToAlloc<SourceLocation>(NumLocations))
4490 ImportDecl(EmptyShell());
4491}
4492
4493ArrayRef<SourceLocation> ImportDecl::getIdentifierLocs() const {
4494 if (!ImportedAndComplete.getInt())
4495 return None;
4496
4497 const auto *StoredLocs = getTrailingObjects<SourceLocation>();
4498 return llvm::makeArrayRef(StoredLocs,
4499 getNumModuleIdentifiers(getImportedModule()));
4500}
4501
4502SourceRange ImportDecl::getSourceRange() const {
4503 if (!ImportedAndComplete.getInt())
4504 return SourceRange(getLocation(), *getTrailingObjects<SourceLocation>());
4505
4506 return SourceRange(getLocation(), getIdentifierLocs().back());
4507}
4508
4509//===----------------------------------------------------------------------===//
4510// ExportDecl Implementation
4511//===----------------------------------------------------------------------===//
4512
4513void ExportDecl::anchor() {}
4514
4515ExportDecl *ExportDecl::Create(ASTContext &C, DeclContext *DC,
4516 SourceLocation ExportLoc) {
4517 return new (C, DC) ExportDecl(DC, ExportLoc);
4518}
4519
4520ExportDecl *ExportDecl::CreateDeserialized(ASTContext &C, unsigned ID) {
4521 return new (C, ID) ExportDecl(nullptr, SourceLocation());
4522}