1 //===--- ASTContext.cpp - Context to hold long-lived AST nodes ------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the ASTContext interface.
12 //===----------------------------------------------------------------------===//
14 #include "clang/AST/ASTContext.h"
15 #include "clang/AST/CharUnits.h"
16 #include "clang/AST/DeclCXX.h"
17 #include "clang/AST/DeclObjC.h"
18 #include "clang/AST/DeclTemplate.h"
19 #include "clang/AST/TypeLoc.h"
20 #include "clang/AST/Expr.h"
21 #include "clang/AST/ExprCXX.h"
22 #include "clang/AST/ExternalASTSource.h"
23 #include "clang/AST/ASTMutationListener.h"
24 #include "clang/AST/RecordLayout.h"
25 #include "clang/AST/Mangle.h"
26 #include "clang/Basic/Builtins.h"
27 #include "clang/Basic/SourceManager.h"
28 #include "clang/Basic/TargetInfo.h"
29 #include "llvm/ADT/SmallString.h"
30 #include "llvm/ADT/StringExtras.h"
31 #include "llvm/Support/MathExtras.h"
32 #include "llvm/Support/raw_ostream.h"
33 #include "llvm/Support/Capacity.h"
37 using namespace clang;
39 unsigned ASTContext::NumImplicitDefaultConstructors;
40 unsigned ASTContext::NumImplicitDefaultConstructorsDeclared;
41 unsigned ASTContext::NumImplicitCopyConstructors;
42 unsigned ASTContext::NumImplicitCopyConstructorsDeclared;
43 unsigned ASTContext::NumImplicitMoveConstructors;
44 unsigned ASTContext::NumImplicitMoveConstructorsDeclared;
45 unsigned ASTContext::NumImplicitCopyAssignmentOperators;
46 unsigned ASTContext::NumImplicitCopyAssignmentOperatorsDeclared;
47 unsigned ASTContext::NumImplicitMoveAssignmentOperators;
48 unsigned ASTContext::NumImplicitMoveAssignmentOperatorsDeclared;
49 unsigned ASTContext::NumImplicitDestructors;
50 unsigned ASTContext::NumImplicitDestructorsDeclared;
53 HalfRank, FloatRank, DoubleRank, LongDoubleRank
57 ASTContext::CanonicalTemplateTemplateParm::Profile(llvm::FoldingSetNodeID &ID,
58 TemplateTemplateParmDecl *Parm) {
59 ID.AddInteger(Parm->getDepth());
60 ID.AddInteger(Parm->getPosition());
61 ID.AddBoolean(Parm->isParameterPack());
63 TemplateParameterList *Params = Parm->getTemplateParameters();
64 ID.AddInteger(Params->size());
65 for (TemplateParameterList::const_iterator P = Params->begin(),
68 if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*P)) {
70 ID.AddBoolean(TTP->isParameterPack());
74 if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(*P)) {
76 ID.AddBoolean(NTTP->isParameterPack());
77 ID.AddPointer(NTTP->getType().getCanonicalType().getAsOpaquePtr());
78 if (NTTP->isExpandedParameterPack()) {
80 ID.AddInteger(NTTP->getNumExpansionTypes());
81 for (unsigned I = 0, N = NTTP->getNumExpansionTypes(); I != N; ++I) {
82 QualType T = NTTP->getExpansionType(I);
83 ID.AddPointer(T.getCanonicalType().getAsOpaquePtr());
90 TemplateTemplateParmDecl *TTP = cast<TemplateTemplateParmDecl>(*P);
96 TemplateTemplateParmDecl *
97 ASTContext::getCanonicalTemplateTemplateParmDecl(
98 TemplateTemplateParmDecl *TTP) const {
99 // Check if we already have a canonical template template parameter.
100 llvm::FoldingSetNodeID ID;
101 CanonicalTemplateTemplateParm::Profile(ID, TTP);
103 CanonicalTemplateTemplateParm *Canonical
104 = CanonTemplateTemplateParms.FindNodeOrInsertPos(ID, InsertPos);
106 return Canonical->getParam();
108 // Build a canonical template parameter list.
109 TemplateParameterList *Params = TTP->getTemplateParameters();
110 SmallVector<NamedDecl *, 4> CanonParams;
111 CanonParams.reserve(Params->size());
112 for (TemplateParameterList::const_iterator P = Params->begin(),
113 PEnd = Params->end();
115 if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*P))
116 CanonParams.push_back(
117 TemplateTypeParmDecl::Create(*this, getTranslationUnitDecl(),
121 TTP->getIndex(), 0, false,
122 TTP->isParameterPack()));
123 else if (NonTypeTemplateParmDecl *NTTP
124 = dyn_cast<NonTypeTemplateParmDecl>(*P)) {
125 QualType T = getCanonicalType(NTTP->getType());
126 TypeSourceInfo *TInfo = getTrivialTypeSourceInfo(T);
127 NonTypeTemplateParmDecl *Param;
128 if (NTTP->isExpandedParameterPack()) {
129 SmallVector<QualType, 2> ExpandedTypes;
130 SmallVector<TypeSourceInfo *, 2> ExpandedTInfos;
131 for (unsigned I = 0, N = NTTP->getNumExpansionTypes(); I != N; ++I) {
132 ExpandedTypes.push_back(getCanonicalType(NTTP->getExpansionType(I)));
133 ExpandedTInfos.push_back(
134 getTrivialTypeSourceInfo(ExpandedTypes.back()));
137 Param = NonTypeTemplateParmDecl::Create(*this, getTranslationUnitDecl(),
141 NTTP->getPosition(), 0,
144 ExpandedTypes.data(),
145 ExpandedTypes.size(),
146 ExpandedTInfos.data());
148 Param = NonTypeTemplateParmDecl::Create(*this, getTranslationUnitDecl(),
152 NTTP->getPosition(), 0,
154 NTTP->isParameterPack(),
157 CanonParams.push_back(Param);
160 CanonParams.push_back(getCanonicalTemplateTemplateParmDecl(
161 cast<TemplateTemplateParmDecl>(*P)));
164 TemplateTemplateParmDecl *CanonTTP
165 = TemplateTemplateParmDecl::Create(*this, getTranslationUnitDecl(),
166 SourceLocation(), TTP->getDepth(),
168 TTP->isParameterPack(),
170 TemplateParameterList::Create(*this, SourceLocation(),
176 // Get the new insert position for the node we care about.
177 Canonical = CanonTemplateTemplateParms.FindNodeOrInsertPos(ID, InsertPos);
178 assert(Canonical == 0 && "Shouldn't be in the map!");
181 // Create the canonical template template parameter entry.
182 Canonical = new (*this) CanonicalTemplateTemplateParm(CanonTTP);
183 CanonTemplateTemplateParms.InsertNode(Canonical, InsertPos);
187 CXXABI *ASTContext::createCXXABI(const TargetInfo &T) {
188 if (!LangOpts.CPlusPlus) return 0;
190 switch (T.getCXXABI()) {
192 return CreateARMCXXABI(*this);
194 return CreateItaniumCXXABI(*this);
195 case CXXABI_Microsoft:
196 return CreateMicrosoftCXXABI(*this);
198 llvm_unreachable("Invalid CXXABI type!");
201 static const LangAS::Map *getAddressSpaceMap(const TargetInfo &T,
202 const LangOptions &LOpts) {
203 if (LOpts.FakeAddressSpaceMap) {
204 // The fake address space map must have a distinct entry for each
205 // language-specific address space.
206 static const unsigned FakeAddrSpaceMap[] = {
211 return &FakeAddrSpaceMap;
213 return &T.getAddressSpaceMap();
217 ASTContext::ASTContext(LangOptions& LOpts, SourceManager &SM,
219 IdentifierTable &idents, SelectorTable &sels,
220 Builtin::Context &builtins,
221 unsigned size_reserve,
222 bool DelayInitialization)
223 : FunctionProtoTypes(this_()),
224 TemplateSpecializationTypes(this_()),
225 DependentTemplateSpecializationTypes(this_()),
226 SubstTemplateTemplateParmPacks(this_()),
227 GlobalNestedNameSpecifier(0),
228 Int128Decl(0), UInt128Decl(0),
229 ObjCIdDecl(0), ObjCSelDecl(0), ObjCClassDecl(0), ObjCProtocolClassDecl(0),
230 CFConstantStringTypeDecl(0), ObjCInstanceTypeDecl(0),
232 jmp_bufDecl(0), sigjmp_bufDecl(0), ucontext_tDecl(0),
233 BlockDescriptorType(0), BlockDescriptorExtendedType(0),
234 cudaConfigureCallDecl(0),
235 NullTypeSourceInfo(QualType()),
236 FirstLocalImport(), LastLocalImport(),
237 SourceMgr(SM), LangOpts(LOpts),
238 AddrSpaceMap(0), Target(t), PrintingPolicy(LOpts),
239 Idents(idents), Selectors(sels),
240 BuiltinInfo(builtins),
241 DeclarationNames(*this),
242 ExternalSource(0), Listener(0),
244 UniqueBlockByRefTypeID(0)
246 if (size_reserve > 0) Types.reserve(size_reserve);
247 TUDecl = TranslationUnitDecl::Create(*this);
249 if (!DelayInitialization) {
250 assert(t && "No target supplied for ASTContext initialization");
251 InitBuiltinTypes(*t);
255 ASTContext::~ASTContext() {
256 // Release the DenseMaps associated with DeclContext objects.
257 // FIXME: Is this the ideal solution?
258 ReleaseDeclContextMaps();
260 // Call all of the deallocation functions.
261 for (unsigned I = 0, N = Deallocations.size(); I != N; ++I)
262 Deallocations[I].first(Deallocations[I].second);
264 // ASTRecordLayout objects in ASTRecordLayouts must always be destroyed
265 // because they can contain DenseMaps.
266 for (llvm::DenseMap<const ObjCContainerDecl*,
267 const ASTRecordLayout*>::iterator
268 I = ObjCLayouts.begin(), E = ObjCLayouts.end(); I != E; )
269 // Increment in loop to prevent using deallocated memory.
270 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second))
273 for (llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*>::iterator
274 I = ASTRecordLayouts.begin(), E = ASTRecordLayouts.end(); I != E; ) {
275 // Increment in loop to prevent using deallocated memory.
276 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second))
280 for (llvm::DenseMap<const Decl*, AttrVec*>::iterator A = DeclAttrs.begin(),
281 AEnd = DeclAttrs.end();
283 A->second->~AttrVec();
286 void ASTContext::AddDeallocation(void (*Callback)(void*), void *Data) {
287 Deallocations.push_back(std::make_pair(Callback, Data));
291 ASTContext::setExternalSource(OwningPtr<ExternalASTSource> &Source) {
292 ExternalSource.reset(Source.take());
295 void ASTContext::PrintStats() const {
296 llvm::errs() << "\n*** AST Context Stats:\n";
297 llvm::errs() << " " << Types.size() << " types total.\n";
299 unsigned counts[] = {
300 #define TYPE(Name, Parent) 0,
301 #define ABSTRACT_TYPE(Name, Parent)
302 #include "clang/AST/TypeNodes.def"
306 for (unsigned i = 0, e = Types.size(); i != e; ++i) {
308 counts[(unsigned)T->getTypeClass()]++;
312 unsigned TotalBytes = 0;
313 #define TYPE(Name, Parent) \
315 llvm::errs() << " " << counts[Idx] << " " << #Name \
317 TotalBytes += counts[Idx] * sizeof(Name##Type); \
319 #define ABSTRACT_TYPE(Name, Parent)
320 #include "clang/AST/TypeNodes.def"
322 llvm::errs() << "Total bytes = " << TotalBytes << "\n";
324 // Implicit special member functions.
325 llvm::errs() << NumImplicitDefaultConstructorsDeclared << "/"
326 << NumImplicitDefaultConstructors
327 << " implicit default constructors created\n";
328 llvm::errs() << NumImplicitCopyConstructorsDeclared << "/"
329 << NumImplicitCopyConstructors
330 << " implicit copy constructors created\n";
331 if (getLangOpts().CPlusPlus)
332 llvm::errs() << NumImplicitMoveConstructorsDeclared << "/"
333 << NumImplicitMoveConstructors
334 << " implicit move constructors created\n";
335 llvm::errs() << NumImplicitCopyAssignmentOperatorsDeclared << "/"
336 << NumImplicitCopyAssignmentOperators
337 << " implicit copy assignment operators created\n";
338 if (getLangOpts().CPlusPlus)
339 llvm::errs() << NumImplicitMoveAssignmentOperatorsDeclared << "/"
340 << NumImplicitMoveAssignmentOperators
341 << " implicit move assignment operators created\n";
342 llvm::errs() << NumImplicitDestructorsDeclared << "/"
343 << NumImplicitDestructors
344 << " implicit destructors created\n";
346 if (ExternalSource.get()) {
347 llvm::errs() << "\n";
348 ExternalSource->PrintStats();
351 BumpAlloc.PrintStats();
354 TypedefDecl *ASTContext::getInt128Decl() const {
356 TypeSourceInfo *TInfo = getTrivialTypeSourceInfo(Int128Ty);
357 Int128Decl = TypedefDecl::Create(const_cast<ASTContext &>(*this),
358 getTranslationUnitDecl(),
361 &Idents.get("__int128_t"),
368 TypedefDecl *ASTContext::getUInt128Decl() const {
370 TypeSourceInfo *TInfo = getTrivialTypeSourceInfo(UnsignedInt128Ty);
371 UInt128Decl = TypedefDecl::Create(const_cast<ASTContext &>(*this),
372 getTranslationUnitDecl(),
375 &Idents.get("__uint128_t"),
382 void ASTContext::InitBuiltinType(CanQualType &R, BuiltinType::Kind K) {
383 BuiltinType *Ty = new (*this, TypeAlignment) BuiltinType(K);
384 R = CanQualType::CreateUnsafe(QualType(Ty, 0));
388 void ASTContext::InitBuiltinTypes(const TargetInfo &Target) {
389 assert((!this->Target || this->Target == &Target) &&
390 "Incorrect target reinitialization");
391 assert(VoidTy.isNull() && "Context reinitialized?");
393 this->Target = &Target;
395 ABI.reset(createCXXABI(Target));
396 AddrSpaceMap = getAddressSpaceMap(Target, LangOpts);
399 InitBuiltinType(VoidTy, BuiltinType::Void);
402 InitBuiltinType(BoolTy, BuiltinType::Bool);
404 if (LangOpts.CharIsSigned)
405 InitBuiltinType(CharTy, BuiltinType::Char_S);
407 InitBuiltinType(CharTy, BuiltinType::Char_U);
409 InitBuiltinType(SignedCharTy, BuiltinType::SChar);
410 InitBuiltinType(ShortTy, BuiltinType::Short);
411 InitBuiltinType(IntTy, BuiltinType::Int);
412 InitBuiltinType(LongTy, BuiltinType::Long);
413 InitBuiltinType(LongLongTy, BuiltinType::LongLong);
416 InitBuiltinType(UnsignedCharTy, BuiltinType::UChar);
417 InitBuiltinType(UnsignedShortTy, BuiltinType::UShort);
418 InitBuiltinType(UnsignedIntTy, BuiltinType::UInt);
419 InitBuiltinType(UnsignedLongTy, BuiltinType::ULong);
420 InitBuiltinType(UnsignedLongLongTy, BuiltinType::ULongLong);
423 InitBuiltinType(FloatTy, BuiltinType::Float);
424 InitBuiltinType(DoubleTy, BuiltinType::Double);
425 InitBuiltinType(LongDoubleTy, BuiltinType::LongDouble);
427 // GNU extension, 128-bit integers.
428 InitBuiltinType(Int128Ty, BuiltinType::Int128);
429 InitBuiltinType(UnsignedInt128Ty, BuiltinType::UInt128);
431 if (LangOpts.CPlusPlus) { // C++ 3.9.1p5
432 if (TargetInfo::isTypeSigned(Target.getWCharType()))
433 InitBuiltinType(WCharTy, BuiltinType::WChar_S);
434 else // -fshort-wchar makes wchar_t be unsigned.
435 InitBuiltinType(WCharTy, BuiltinType::WChar_U);
437 WCharTy = getFromTargetType(Target.getWCharType());
439 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++
440 InitBuiltinType(Char16Ty, BuiltinType::Char16);
442 Char16Ty = getFromTargetType(Target.getChar16Type());
444 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++
445 InitBuiltinType(Char32Ty, BuiltinType::Char32);
447 Char32Ty = getFromTargetType(Target.getChar32Type());
449 // Placeholder type for type-dependent expressions whose type is
450 // completely unknown. No code should ever check a type against
451 // DependentTy and users should never see it; however, it is here to
452 // help diagnose failures to properly check for type-dependent
454 InitBuiltinType(DependentTy, BuiltinType::Dependent);
456 // Placeholder type for functions.
457 InitBuiltinType(OverloadTy, BuiltinType::Overload);
459 // Placeholder type for bound members.
460 InitBuiltinType(BoundMemberTy, BuiltinType::BoundMember);
462 // Placeholder type for pseudo-objects.
463 InitBuiltinType(PseudoObjectTy, BuiltinType::PseudoObject);
465 // "any" type; useful for debugger-like clients.
466 InitBuiltinType(UnknownAnyTy, BuiltinType::UnknownAny);
468 // Placeholder type for unbridged ARC casts.
469 InitBuiltinType(ARCUnbridgedCastTy, BuiltinType::ARCUnbridgedCast);
472 FloatComplexTy = getComplexType(FloatTy);
473 DoubleComplexTy = getComplexType(DoubleTy);
474 LongDoubleComplexTy = getComplexType(LongDoubleTy);
476 BuiltinVaListType = QualType();
478 // Builtin types for 'id', 'Class', and 'SEL'.
479 InitBuiltinType(ObjCBuiltinIdTy, BuiltinType::ObjCId);
480 InitBuiltinType(ObjCBuiltinClassTy, BuiltinType::ObjCClass);
481 InitBuiltinType(ObjCBuiltinSelTy, BuiltinType::ObjCSel);
483 // Builtin type for __objc_yes and __objc_no
484 ObjCBuiltinBoolTy = (Target.useSignedCharForObjCBool() ?
485 SignedCharTy : BoolTy);
487 ObjCConstantStringType = QualType();
490 VoidPtrTy = getPointerType(VoidTy);
492 // nullptr type (C++0x 2.14.7)
493 InitBuiltinType(NullPtrTy, BuiltinType::NullPtr);
495 // half type (OpenCL 6.1.1.1) / ARM NEON __fp16
496 InitBuiltinType(HalfTy, BuiltinType::Half);
499 DiagnosticsEngine &ASTContext::getDiagnostics() const {
500 return SourceMgr.getDiagnostics();
503 AttrVec& ASTContext::getDeclAttrs(const Decl *D) {
504 AttrVec *&Result = DeclAttrs[D];
506 void *Mem = Allocate(sizeof(AttrVec));
507 Result = new (Mem) AttrVec;
513 /// \brief Erase the attributes corresponding to the given declaration.
514 void ASTContext::eraseDeclAttrs(const Decl *D) {
515 llvm::DenseMap<const Decl*, AttrVec*>::iterator Pos = DeclAttrs.find(D);
516 if (Pos != DeclAttrs.end()) {
517 Pos->second->~AttrVec();
518 DeclAttrs.erase(Pos);
522 MemberSpecializationInfo *
523 ASTContext::getInstantiatedFromStaticDataMember(const VarDecl *Var) {
524 assert(Var->isStaticDataMember() && "Not a static data member");
525 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *>::iterator Pos
526 = InstantiatedFromStaticDataMember.find(Var);
527 if (Pos == InstantiatedFromStaticDataMember.end())
534 ASTContext::setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl,
535 TemplateSpecializationKind TSK,
536 SourceLocation PointOfInstantiation) {
537 assert(Inst->isStaticDataMember() && "Not a static data member");
538 assert(Tmpl->isStaticDataMember() && "Not a static data member");
539 assert(!InstantiatedFromStaticDataMember[Inst] &&
540 "Already noted what static data member was instantiated from");
541 InstantiatedFromStaticDataMember[Inst]
542 = new (*this) MemberSpecializationInfo(Tmpl, TSK, PointOfInstantiation);
545 FunctionDecl *ASTContext::getClassScopeSpecializationPattern(
546 const FunctionDecl *FD){
547 assert(FD && "Specialization is 0");
548 llvm::DenseMap<const FunctionDecl*, FunctionDecl *>::const_iterator Pos
549 = ClassScopeSpecializationPattern.find(FD);
550 if (Pos == ClassScopeSpecializationPattern.end())
556 void ASTContext::setClassScopeSpecializationPattern(FunctionDecl *FD,
557 FunctionDecl *Pattern) {
558 assert(FD && "Specialization is 0");
559 assert(Pattern && "Class scope specialization pattern is 0");
560 ClassScopeSpecializationPattern[FD] = Pattern;
564 ASTContext::getInstantiatedFromUsingDecl(UsingDecl *UUD) {
565 llvm::DenseMap<UsingDecl *, NamedDecl *>::const_iterator Pos
566 = InstantiatedFromUsingDecl.find(UUD);
567 if (Pos == InstantiatedFromUsingDecl.end())
574 ASTContext::setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern) {
575 assert((isa<UsingDecl>(Pattern) ||
576 isa<UnresolvedUsingValueDecl>(Pattern) ||
577 isa<UnresolvedUsingTypenameDecl>(Pattern)) &&
578 "pattern decl is not a using decl");
579 assert(!InstantiatedFromUsingDecl[Inst] && "pattern already exists");
580 InstantiatedFromUsingDecl[Inst] = Pattern;
584 ASTContext::getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst) {
585 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*>::const_iterator Pos
586 = InstantiatedFromUsingShadowDecl.find(Inst);
587 if (Pos == InstantiatedFromUsingShadowDecl.end())
594 ASTContext::setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst,
595 UsingShadowDecl *Pattern) {
596 assert(!InstantiatedFromUsingShadowDecl[Inst] && "pattern already exists");
597 InstantiatedFromUsingShadowDecl[Inst] = Pattern;
600 FieldDecl *ASTContext::getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field) {
601 llvm::DenseMap<FieldDecl *, FieldDecl *>::iterator Pos
602 = InstantiatedFromUnnamedFieldDecl.find(Field);
603 if (Pos == InstantiatedFromUnnamedFieldDecl.end())
609 void ASTContext::setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst,
611 assert(!Inst->getDeclName() && "Instantiated field decl is not unnamed");
612 assert(!Tmpl->getDeclName() && "Template field decl is not unnamed");
613 assert(!InstantiatedFromUnnamedFieldDecl[Inst] &&
614 "Already noted what unnamed field was instantiated from");
616 InstantiatedFromUnnamedFieldDecl[Inst] = Tmpl;
619 bool ASTContext::ZeroBitfieldFollowsNonBitfield(const FieldDecl *FD,
620 const FieldDecl *LastFD) const {
621 return (FD->isBitField() && LastFD && !LastFD->isBitField() &&
622 FD->getBitWidthValue(*this) == 0);
625 bool ASTContext::ZeroBitfieldFollowsBitfield(const FieldDecl *FD,
626 const FieldDecl *LastFD) const {
627 return (FD->isBitField() && LastFD && LastFD->isBitField() &&
628 FD->getBitWidthValue(*this) == 0 &&
629 LastFD->getBitWidthValue(*this) != 0);
632 bool ASTContext::BitfieldFollowsBitfield(const FieldDecl *FD,
633 const FieldDecl *LastFD) const {
634 return (FD->isBitField() && LastFD && LastFD->isBitField() &&
635 FD->getBitWidthValue(*this) &&
636 LastFD->getBitWidthValue(*this));
639 bool ASTContext::NonBitfieldFollowsBitfield(const FieldDecl *FD,
640 const FieldDecl *LastFD) const {
641 return (!FD->isBitField() && LastFD && LastFD->isBitField() &&
642 LastFD->getBitWidthValue(*this));
645 bool ASTContext::BitfieldFollowsNonBitfield(const FieldDecl *FD,
646 const FieldDecl *LastFD) const {
647 return (FD->isBitField() && LastFD && !LastFD->isBitField() &&
648 FD->getBitWidthValue(*this));
651 ASTContext::overridden_cxx_method_iterator
652 ASTContext::overridden_methods_begin(const CXXMethodDecl *Method) const {
653 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos
654 = OverriddenMethods.find(Method);
655 if (Pos == OverriddenMethods.end())
658 return Pos->second.begin();
661 ASTContext::overridden_cxx_method_iterator
662 ASTContext::overridden_methods_end(const CXXMethodDecl *Method) const {
663 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos
664 = OverriddenMethods.find(Method);
665 if (Pos == OverriddenMethods.end())
668 return Pos->second.end();
672 ASTContext::overridden_methods_size(const CXXMethodDecl *Method) const {
673 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos
674 = OverriddenMethods.find(Method);
675 if (Pos == OverriddenMethods.end())
678 return Pos->second.size();
681 void ASTContext::addOverriddenMethod(const CXXMethodDecl *Method,
682 const CXXMethodDecl *Overridden) {
683 OverriddenMethods[Method].push_back(Overridden);
686 void ASTContext::addedLocalImportDecl(ImportDecl *Import) {
687 assert(!Import->NextLocalImport && "Import declaration already in the chain");
688 assert(!Import->isFromASTFile() && "Non-local import declaration");
689 if (!FirstLocalImport) {
690 FirstLocalImport = Import;
691 LastLocalImport = Import;
695 LastLocalImport->NextLocalImport = Import;
696 LastLocalImport = Import;
699 //===----------------------------------------------------------------------===//
700 // Type Sizing and Analysis
701 //===----------------------------------------------------------------------===//
703 /// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified
704 /// scalar floating point type.
705 const llvm::fltSemantics &ASTContext::getFloatTypeSemantics(QualType T) const {
706 const BuiltinType *BT = T->getAs<BuiltinType>();
707 assert(BT && "Not a floating point type!");
708 switch (BT->getKind()) {
709 default: llvm_unreachable("Not a floating point type!");
710 case BuiltinType::Half: return Target->getHalfFormat();
711 case BuiltinType::Float: return Target->getFloatFormat();
712 case BuiltinType::Double: return Target->getDoubleFormat();
713 case BuiltinType::LongDouble: return Target->getLongDoubleFormat();
717 /// getDeclAlign - Return a conservative estimate of the alignment of the
718 /// specified decl. Note that bitfields do not have a valid alignment, so
719 /// this method will assert on them.
720 /// If @p RefAsPointee, references are treated like their underlying type
721 /// (for alignof), else they're treated like pointers (for CodeGen).
722 CharUnits ASTContext::getDeclAlign(const Decl *D, bool RefAsPointee) const {
723 unsigned Align = Target->getCharWidth();
725 bool UseAlignAttrOnly = false;
726 if (unsigned AlignFromAttr = D->getMaxAlignment()) {
727 Align = AlignFromAttr;
729 // __attribute__((aligned)) can increase or decrease alignment
730 // *except* on a struct or struct member, where it only increases
731 // alignment unless 'packed' is also specified.
733 // It is an error for alignas to decrease alignment, so we can
734 // ignore that possibility; Sema should diagnose it.
735 if (isa<FieldDecl>(D)) {
736 UseAlignAttrOnly = D->hasAttr<PackedAttr>() ||
737 cast<FieldDecl>(D)->getParent()->hasAttr<PackedAttr>();
739 UseAlignAttrOnly = true;
742 else if (isa<FieldDecl>(D))
744 D->hasAttr<PackedAttr>() ||
745 cast<FieldDecl>(D)->getParent()->hasAttr<PackedAttr>();
747 // If we're using the align attribute only, just ignore everything
748 // else about the declaration and its type.
749 if (UseAlignAttrOnly) {
752 } else if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) {
753 QualType T = VD->getType();
754 if (const ReferenceType* RT = T->getAs<ReferenceType>()) {
756 T = RT->getPointeeType();
758 T = getPointerType(RT->getPointeeType());
760 if (!T->isIncompleteType() && !T->isFunctionType()) {
761 // Adjust alignments of declarations with array type by the
762 // large-array alignment on the target.
763 unsigned MinWidth = Target->getLargeArrayMinWidth();
764 const ArrayType *arrayType;
765 if (MinWidth && (arrayType = getAsArrayType(T))) {
766 if (isa<VariableArrayType>(arrayType))
767 Align = std::max(Align, Target->getLargeArrayAlign());
768 else if (isa<ConstantArrayType>(arrayType) &&
769 MinWidth <= getTypeSize(cast<ConstantArrayType>(arrayType)))
770 Align = std::max(Align, Target->getLargeArrayAlign());
772 // Walk through any array types while we're at it.
773 T = getBaseElementType(arrayType);
775 Align = std::max(Align, getPreferredTypeAlign(T.getTypePtr()));
778 // Fields can be subject to extra alignment constraints, like if
779 // the field is packed, the struct is packed, or the struct has a
780 // a max-field-alignment constraint (#pragma pack). So calculate
781 // the actual alignment of the field within the struct, and then
782 // (as we're expected to) constrain that by the alignment of the type.
783 if (const FieldDecl *field = dyn_cast<FieldDecl>(VD)) {
784 // So calculate the alignment of the field.
785 const ASTRecordLayout &layout = getASTRecordLayout(field->getParent());
787 // Start with the record's overall alignment.
788 unsigned fieldAlign = toBits(layout.getAlignment());
790 // Use the GCD of that and the offset within the record.
791 uint64_t offset = layout.getFieldOffset(field->getFieldIndex());
793 // Alignment is always a power of 2, so the GCD will be a power of 2,
794 // which means we get to do this crazy thing instead of Euclid's.
795 uint64_t lowBitOfOffset = offset & (~offset + 1);
796 if (lowBitOfOffset < fieldAlign)
797 fieldAlign = static_cast<unsigned>(lowBitOfOffset);
800 Align = std::min(Align, fieldAlign);
804 return toCharUnitsFromBits(Align);
807 std::pair<CharUnits, CharUnits>
808 ASTContext::getTypeInfoInChars(const Type *T) const {
809 std::pair<uint64_t, unsigned> Info = getTypeInfo(T);
810 return std::make_pair(toCharUnitsFromBits(Info.first),
811 toCharUnitsFromBits(Info.second));
814 std::pair<CharUnits, CharUnits>
815 ASTContext::getTypeInfoInChars(QualType T) const {
816 return getTypeInfoInChars(T.getTypePtr());
819 std::pair<uint64_t, unsigned> ASTContext::getTypeInfo(const Type *T) const {
820 TypeInfoMap::iterator it = MemoizedTypeInfo.find(T);
821 if (it != MemoizedTypeInfo.end())
824 std::pair<uint64_t, unsigned> Info = getTypeInfoImpl(T);
825 MemoizedTypeInfo.insert(std::make_pair(T, Info));
829 /// getTypeInfoImpl - Return the size of the specified type, in bits. This
830 /// method does not work on incomplete types.
832 /// FIXME: Pointers into different addr spaces could have different sizes and
833 /// alignment requirements: getPointerInfo should take an AddrSpace, this
834 /// should take a QualType, &c.
835 std::pair<uint64_t, unsigned>
836 ASTContext::getTypeInfoImpl(const Type *T) const {
839 switch (T->getTypeClass()) {
840 #define TYPE(Class, Base)
841 #define ABSTRACT_TYPE(Class, Base)
842 #define NON_CANONICAL_TYPE(Class, Base)
843 #define DEPENDENT_TYPE(Class, Base) case Type::Class:
844 #include "clang/AST/TypeNodes.def"
845 llvm_unreachable("Should not see dependent types");
847 case Type::FunctionNoProto:
848 case Type::FunctionProto:
849 // GCC extension: alignof(function) = 32 bits
854 case Type::IncompleteArray:
855 case Type::VariableArray:
857 Align = getTypeAlign(cast<ArrayType>(T)->getElementType());
860 case Type::ConstantArray: {
861 const ConstantArrayType *CAT = cast<ConstantArrayType>(T);
863 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(CAT->getElementType());
864 uint64_t Size = CAT->getSize().getZExtValue();
865 assert((Size == 0 || EltInfo.first <= (uint64_t)(-1)/Size) &&
866 "Overflow in array type bit size evaluation");
867 Width = EltInfo.first*Size;
868 Align = EltInfo.second;
869 Width = llvm::RoundUpToAlignment(Width, Align);
872 case Type::ExtVector:
874 const VectorType *VT = cast<VectorType>(T);
875 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(VT->getElementType());
876 Width = EltInfo.first*VT->getNumElements();
878 // If the alignment is not a power of 2, round up to the next power of 2.
879 // This happens for non-power-of-2 length vectors.
880 if (Align & (Align-1)) {
881 Align = llvm::NextPowerOf2(Align);
882 Width = llvm::RoundUpToAlignment(Width, Align);
888 switch (cast<BuiltinType>(T)->getKind()) {
889 default: llvm_unreachable("Unknown builtin type!");
890 case BuiltinType::Void:
891 // GCC extension: alignof(void) = 8 bits.
896 case BuiltinType::Bool:
897 Width = Target->getBoolWidth();
898 Align = Target->getBoolAlign();
900 case BuiltinType::Char_S:
901 case BuiltinType::Char_U:
902 case BuiltinType::UChar:
903 case BuiltinType::SChar:
904 Width = Target->getCharWidth();
905 Align = Target->getCharAlign();
907 case BuiltinType::WChar_S:
908 case BuiltinType::WChar_U:
909 Width = Target->getWCharWidth();
910 Align = Target->getWCharAlign();
912 case BuiltinType::Char16:
913 Width = Target->getChar16Width();
914 Align = Target->getChar16Align();
916 case BuiltinType::Char32:
917 Width = Target->getChar32Width();
918 Align = Target->getChar32Align();
920 case BuiltinType::UShort:
921 case BuiltinType::Short:
922 Width = Target->getShortWidth();
923 Align = Target->getShortAlign();
925 case BuiltinType::UInt:
926 case BuiltinType::Int:
927 Width = Target->getIntWidth();
928 Align = Target->getIntAlign();
930 case BuiltinType::ULong:
931 case BuiltinType::Long:
932 Width = Target->getLongWidth();
933 Align = Target->getLongAlign();
935 case BuiltinType::ULongLong:
936 case BuiltinType::LongLong:
937 Width = Target->getLongLongWidth();
938 Align = Target->getLongLongAlign();
940 case BuiltinType::Int128:
941 case BuiltinType::UInt128:
943 Align = 128; // int128_t is 128-bit aligned on all targets.
945 case BuiltinType::Half:
946 Width = Target->getHalfWidth();
947 Align = Target->getHalfAlign();
949 case BuiltinType::Float:
950 Width = Target->getFloatWidth();
951 Align = Target->getFloatAlign();
953 case BuiltinType::Double:
954 Width = Target->getDoubleWidth();
955 Align = Target->getDoubleAlign();
957 case BuiltinType::LongDouble:
958 Width = Target->getLongDoubleWidth();
959 Align = Target->getLongDoubleAlign();
961 case BuiltinType::NullPtr:
962 Width = Target->getPointerWidth(0); // C++ 3.9.1p11: sizeof(nullptr_t)
963 Align = Target->getPointerAlign(0); // == sizeof(void*)
965 case BuiltinType::ObjCId:
966 case BuiltinType::ObjCClass:
967 case BuiltinType::ObjCSel:
968 Width = Target->getPointerWidth(0);
969 Align = Target->getPointerAlign(0);
973 case Type::ObjCObjectPointer:
974 Width = Target->getPointerWidth(0);
975 Align = Target->getPointerAlign(0);
977 case Type::BlockPointer: {
978 unsigned AS = getTargetAddressSpace(
979 cast<BlockPointerType>(T)->getPointeeType());
980 Width = Target->getPointerWidth(AS);
981 Align = Target->getPointerAlign(AS);
984 case Type::LValueReference:
985 case Type::RValueReference: {
986 // alignof and sizeof should never enter this code path here, so we go
987 // the pointer route.
988 unsigned AS = getTargetAddressSpace(
989 cast<ReferenceType>(T)->getPointeeType());
990 Width = Target->getPointerWidth(AS);
991 Align = Target->getPointerAlign(AS);
994 case Type::Pointer: {
995 unsigned AS = getTargetAddressSpace(cast<PointerType>(T)->getPointeeType());
996 Width = Target->getPointerWidth(AS);
997 Align = Target->getPointerAlign(AS);
1000 case Type::MemberPointer: {
1001 const MemberPointerType *MPT = cast<MemberPointerType>(T);
1002 std::pair<uint64_t, unsigned> PtrDiffInfo =
1003 getTypeInfo(getPointerDiffType());
1004 Width = PtrDiffInfo.first * ABI->getMemberPointerSize(MPT);
1005 Align = PtrDiffInfo.second;
1008 case Type::Complex: {
1009 // Complex types have the same alignment as their elements, but twice the
1011 std::pair<uint64_t, unsigned> EltInfo =
1012 getTypeInfo(cast<ComplexType>(T)->getElementType());
1013 Width = EltInfo.first*2;
1014 Align = EltInfo.second;
1017 case Type::ObjCObject:
1018 return getTypeInfo(cast<ObjCObjectType>(T)->getBaseType().getTypePtr());
1019 case Type::ObjCInterface: {
1020 const ObjCInterfaceType *ObjCI = cast<ObjCInterfaceType>(T);
1021 const ASTRecordLayout &Layout = getASTObjCInterfaceLayout(ObjCI->getDecl());
1022 Width = toBits(Layout.getSize());
1023 Align = toBits(Layout.getAlignment());
1028 const TagType *TT = cast<TagType>(T);
1030 if (TT->getDecl()->isInvalidDecl()) {
1036 if (const EnumType *ET = dyn_cast<EnumType>(TT))
1037 return getTypeInfo(ET->getDecl()->getIntegerType());
1039 const RecordType *RT = cast<RecordType>(TT);
1040 const ASTRecordLayout &Layout = getASTRecordLayout(RT->getDecl());
1041 Width = toBits(Layout.getSize());
1042 Align = toBits(Layout.getAlignment());
1046 case Type::SubstTemplateTypeParm:
1047 return getTypeInfo(cast<SubstTemplateTypeParmType>(T)->
1048 getReplacementType().getTypePtr());
1051 const AutoType *A = cast<AutoType>(T);
1052 assert(A->isDeduced() && "Cannot request the size of a dependent type");
1053 return getTypeInfo(A->getDeducedType().getTypePtr());
1057 return getTypeInfo(cast<ParenType>(T)->getInnerType().getTypePtr());
1059 case Type::Typedef: {
1060 const TypedefNameDecl *Typedef = cast<TypedefType>(T)->getDecl();
1061 std::pair<uint64_t, unsigned> Info
1062 = getTypeInfo(Typedef->getUnderlyingType().getTypePtr());
1063 // If the typedef has an aligned attribute on it, it overrides any computed
1064 // alignment we have. This violates the GCC documentation (which says that
1065 // attribute(aligned) can only round up) but matches its implementation.
1066 if (unsigned AttrAlign = Typedef->getMaxAlignment())
1069 Align = Info.second;
1074 case Type::TypeOfExpr:
1075 return getTypeInfo(cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType()
1079 return getTypeInfo(cast<TypeOfType>(T)->getUnderlyingType().getTypePtr());
1081 case Type::Decltype:
1082 return getTypeInfo(cast<DecltypeType>(T)->getUnderlyingExpr()->getType()
1085 case Type::UnaryTransform:
1086 return getTypeInfo(cast<UnaryTransformType>(T)->getUnderlyingType());
1088 case Type::Elaborated:
1089 return getTypeInfo(cast<ElaboratedType>(T)->getNamedType().getTypePtr());
1091 case Type::Attributed:
1093 cast<AttributedType>(T)->getEquivalentType().getTypePtr());
1095 case Type::TemplateSpecialization: {
1096 assert(getCanonicalType(T) != T &&
1097 "Cannot request the size of a dependent type");
1098 const TemplateSpecializationType *TST = cast<TemplateSpecializationType>(T);
1099 // A type alias template specialization may refer to a typedef with the
1100 // aligned attribute on it.
1101 if (TST->isTypeAlias())
1102 return getTypeInfo(TST->getAliasedType().getTypePtr());
1104 return getTypeInfo(getCanonicalType(T));
1107 case Type::Atomic: {
1108 std::pair<uint64_t, unsigned> Info
1109 = getTypeInfo(cast<AtomicType>(T)->getValueType());
1111 Align = Info.second;
1112 if (Width != 0 && Width <= Target->getMaxAtomicPromoteWidth() &&
1113 llvm::isPowerOf2_64(Width)) {
1114 // We can potentially perform lock-free atomic operations for this
1115 // type; promote the alignment appropriately.
1116 // FIXME: We could potentially promote the width here as well...
1117 // is that worthwhile? (Non-struct atomic types generally have
1118 // power-of-two size anyway, but structs might not. Requires a bit
1119 // of implementation work to make sure we zero out the extra bits.)
1120 Align = static_cast<unsigned>(Width);
1126 assert(llvm::isPowerOf2_32(Align) && "Alignment must be power of 2");
1127 return std::make_pair(Width, Align);
1130 /// toCharUnitsFromBits - Convert a size in bits to a size in characters.
1131 CharUnits ASTContext::toCharUnitsFromBits(int64_t BitSize) const {
1132 return CharUnits::fromQuantity(BitSize / getCharWidth());
1135 /// toBits - Convert a size in characters to a size in characters.
1136 int64_t ASTContext::toBits(CharUnits CharSize) const {
1137 return CharSize.getQuantity() * getCharWidth();
1140 /// getTypeSizeInChars - Return the size of the specified type, in characters.
1141 /// This method does not work on incomplete types.
1142 CharUnits ASTContext::getTypeSizeInChars(QualType T) const {
1143 return toCharUnitsFromBits(getTypeSize(T));
1145 CharUnits ASTContext::getTypeSizeInChars(const Type *T) const {
1146 return toCharUnitsFromBits(getTypeSize(T));
1149 /// getTypeAlignInChars - Return the ABI-specified alignment of a type, in
1150 /// characters. This method does not work on incomplete types.
1151 CharUnits ASTContext::getTypeAlignInChars(QualType T) const {
1152 return toCharUnitsFromBits(getTypeAlign(T));
1154 CharUnits ASTContext::getTypeAlignInChars(const Type *T) const {
1155 return toCharUnitsFromBits(getTypeAlign(T));
1158 /// getPreferredTypeAlign - Return the "preferred" alignment of the specified
1159 /// type for the current target in bits. This can be different than the ABI
1160 /// alignment in cases where it is beneficial for performance to overalign
1162 unsigned ASTContext::getPreferredTypeAlign(const Type *T) const {
1163 unsigned ABIAlign = getTypeAlign(T);
1165 // Double and long long should be naturally aligned if possible.
1166 if (const ComplexType* CT = T->getAs<ComplexType>())
1167 T = CT->getElementType().getTypePtr();
1168 if (T->isSpecificBuiltinType(BuiltinType::Double) ||
1169 T->isSpecificBuiltinType(BuiltinType::LongLong) ||
1170 T->isSpecificBuiltinType(BuiltinType::ULongLong))
1171 return std::max(ABIAlign, (unsigned)getTypeSize(T));
1176 /// DeepCollectObjCIvars -
1177 /// This routine first collects all declared, but not synthesized, ivars in
1178 /// super class and then collects all ivars, including those synthesized for
1179 /// current class. This routine is used for implementation of current class
1180 /// when all ivars, declared and synthesized are known.
1182 void ASTContext::DeepCollectObjCIvars(const ObjCInterfaceDecl *OI,
1184 SmallVectorImpl<const ObjCIvarDecl*> &Ivars) const {
1185 if (const ObjCInterfaceDecl *SuperClass = OI->getSuperClass())
1186 DeepCollectObjCIvars(SuperClass, false, Ivars);
1188 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(),
1189 E = OI->ivar_end(); I != E; ++I)
1190 Ivars.push_back(*I);
1192 ObjCInterfaceDecl *IDecl = const_cast<ObjCInterfaceDecl *>(OI);
1193 for (const ObjCIvarDecl *Iv = IDecl->all_declared_ivar_begin(); Iv;
1194 Iv= Iv->getNextIvar())
1195 Ivars.push_back(Iv);
1199 /// CollectInheritedProtocols - Collect all protocols in current class and
1200 /// those inherited by it.
1201 void ASTContext::CollectInheritedProtocols(const Decl *CDecl,
1202 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols) {
1203 if (const ObjCInterfaceDecl *OI = dyn_cast<ObjCInterfaceDecl>(CDecl)) {
1204 // We can use protocol_iterator here instead of
1205 // all_referenced_protocol_iterator since we are walking all categories.
1206 for (ObjCInterfaceDecl::all_protocol_iterator P = OI->all_referenced_protocol_begin(),
1207 PE = OI->all_referenced_protocol_end(); P != PE; ++P) {
1208 ObjCProtocolDecl *Proto = (*P);
1209 Protocols.insert(Proto->getCanonicalDecl());
1210 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(),
1211 PE = Proto->protocol_end(); P != PE; ++P) {
1212 Protocols.insert((*P)->getCanonicalDecl());
1213 CollectInheritedProtocols(*P, Protocols);
1217 // Categories of this Interface.
1218 for (const ObjCCategoryDecl *CDeclChain = OI->getCategoryList();
1219 CDeclChain; CDeclChain = CDeclChain->getNextClassCategory())
1220 CollectInheritedProtocols(CDeclChain, Protocols);
1221 if (ObjCInterfaceDecl *SD = OI->getSuperClass())
1223 CollectInheritedProtocols(SD, Protocols);
1224 SD = SD->getSuperClass();
1226 } else if (const ObjCCategoryDecl *OC = dyn_cast<ObjCCategoryDecl>(CDecl)) {
1227 for (ObjCCategoryDecl::protocol_iterator P = OC->protocol_begin(),
1228 PE = OC->protocol_end(); P != PE; ++P) {
1229 ObjCProtocolDecl *Proto = (*P);
1230 Protocols.insert(Proto->getCanonicalDecl());
1231 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(),
1232 PE = Proto->protocol_end(); P != PE; ++P)
1233 CollectInheritedProtocols(*P, Protocols);
1235 } else if (const ObjCProtocolDecl *OP = dyn_cast<ObjCProtocolDecl>(CDecl)) {
1236 for (ObjCProtocolDecl::protocol_iterator P = OP->protocol_begin(),
1237 PE = OP->protocol_end(); P != PE; ++P) {
1238 ObjCProtocolDecl *Proto = (*P);
1239 Protocols.insert(Proto->getCanonicalDecl());
1240 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(),
1241 PE = Proto->protocol_end(); P != PE; ++P)
1242 CollectInheritedProtocols(*P, Protocols);
1247 unsigned ASTContext::CountNonClassIvars(const ObjCInterfaceDecl *OI) const {
1249 // Count ivars declared in class extension.
1250 for (const ObjCCategoryDecl *CDecl = OI->getFirstClassExtension(); CDecl;
1251 CDecl = CDecl->getNextClassExtension())
1252 count += CDecl->ivar_size();
1254 // Count ivar defined in this class's implementation. This
1255 // includes synthesized ivars.
1256 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation())
1257 count += ImplDecl->ivar_size();
1262 bool ASTContext::isSentinelNullExpr(const Expr *E) {
1266 // nullptr_t is always treated as null.
1267 if (E->getType()->isNullPtrType()) return true;
1269 if (E->getType()->isAnyPointerType() &&
1270 E->IgnoreParenCasts()->isNullPointerConstant(*this,
1271 Expr::NPC_ValueDependentIsNull))
1274 // Unfortunately, __null has type 'int'.
1275 if (isa<GNUNullExpr>(E)) return true;
1280 /// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists.
1281 ObjCImplementationDecl *ASTContext::getObjCImplementation(ObjCInterfaceDecl *D) {
1282 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator
1283 I = ObjCImpls.find(D);
1284 if (I != ObjCImpls.end())
1285 return cast<ObjCImplementationDecl>(I->second);
1288 /// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists.
1289 ObjCCategoryImplDecl *ASTContext::getObjCImplementation(ObjCCategoryDecl *D) {
1290 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator
1291 I = ObjCImpls.find(D);
1292 if (I != ObjCImpls.end())
1293 return cast<ObjCCategoryImplDecl>(I->second);
1297 /// \brief Set the implementation of ObjCInterfaceDecl.
1298 void ASTContext::setObjCImplementation(ObjCInterfaceDecl *IFaceD,
1299 ObjCImplementationDecl *ImplD) {
1300 assert(IFaceD && ImplD && "Passed null params");
1301 ObjCImpls[IFaceD] = ImplD;
1303 /// \brief Set the implementation of ObjCCategoryDecl.
1304 void ASTContext::setObjCImplementation(ObjCCategoryDecl *CatD,
1305 ObjCCategoryImplDecl *ImplD) {
1306 assert(CatD && ImplD && "Passed null params");
1307 ObjCImpls[CatD] = ImplD;
1310 ObjCInterfaceDecl *ASTContext::getObjContainingInterface(NamedDecl *ND) const {
1311 if (ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(ND->getDeclContext()))
1313 if (ObjCCategoryDecl *CD = dyn_cast<ObjCCategoryDecl>(ND->getDeclContext()))
1314 return CD->getClassInterface();
1315 if (ObjCImplDecl *IMD = dyn_cast<ObjCImplDecl>(ND->getDeclContext()))
1316 return IMD->getClassInterface();
1321 /// \brief Get the copy initialization expression of VarDecl,or NULL if
1323 Expr *ASTContext::getBlockVarCopyInits(const VarDecl*VD) {
1324 assert(VD && "Passed null params");
1325 assert(VD->hasAttr<BlocksAttr>() &&
1326 "getBlockVarCopyInits - not __block var");
1327 llvm::DenseMap<const VarDecl*, Expr*>::iterator
1328 I = BlockVarCopyInits.find(VD);
1329 return (I != BlockVarCopyInits.end()) ? cast<Expr>(I->second) : 0;
1332 /// \brief Set the copy inialization expression of a block var decl.
1333 void ASTContext::setBlockVarCopyInits(VarDecl*VD, Expr* Init) {
1334 assert(VD && Init && "Passed null params");
1335 assert(VD->hasAttr<BlocksAttr>() &&
1336 "setBlockVarCopyInits - not __block var");
1337 BlockVarCopyInits[VD] = Init;
1340 /// \brief Allocate an uninitialized TypeSourceInfo.
1342 /// The caller should initialize the memory held by TypeSourceInfo using
1343 /// the TypeLoc wrappers.
1345 /// \param T the type that will be the basis for type source info. This type
1346 /// should refer to how the declarator was written in source code, not to
1347 /// what type semantic analysis resolved the declarator to.
1348 TypeSourceInfo *ASTContext::CreateTypeSourceInfo(QualType T,
1349 unsigned DataSize) const {
1351 DataSize = TypeLoc::getFullDataSizeForType(T);
1353 assert(DataSize == TypeLoc::getFullDataSizeForType(T) &&
1354 "incorrect data size provided to CreateTypeSourceInfo!");
1356 TypeSourceInfo *TInfo =
1357 (TypeSourceInfo*)BumpAlloc.Allocate(sizeof(TypeSourceInfo) + DataSize, 8);
1358 new (TInfo) TypeSourceInfo(T);
1362 TypeSourceInfo *ASTContext::getTrivialTypeSourceInfo(QualType T,
1363 SourceLocation L) const {
1364 TypeSourceInfo *DI = CreateTypeSourceInfo(T);
1365 DI->getTypeLoc().initialize(const_cast<ASTContext &>(*this), L);
1369 const ASTRecordLayout &
1370 ASTContext::getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) const {
1371 return getObjCLayout(D, 0);
1374 const ASTRecordLayout &
1375 ASTContext::getASTObjCImplementationLayout(
1376 const ObjCImplementationDecl *D) const {
1377 return getObjCLayout(D->getClassInterface(), D);
1380 //===----------------------------------------------------------------------===//
1381 // Type creation/memoization methods
1382 //===----------------------------------------------------------------------===//
1385 ASTContext::getExtQualType(const Type *baseType, Qualifiers quals) const {
1386 unsigned fastQuals = quals.getFastQualifiers();
1387 quals.removeFastQualifiers();
1389 // Check if we've already instantiated this type.
1390 llvm::FoldingSetNodeID ID;
1391 ExtQuals::Profile(ID, baseType, quals);
1392 void *insertPos = 0;
1393 if (ExtQuals *eq = ExtQualNodes.FindNodeOrInsertPos(ID, insertPos)) {
1394 assert(eq->getQualifiers() == quals);
1395 return QualType(eq, fastQuals);
1398 // If the base type is not canonical, make the appropriate canonical type.
1400 if (!baseType->isCanonicalUnqualified()) {
1401 SplitQualType canonSplit = baseType->getCanonicalTypeInternal().split();
1402 canonSplit.Quals.addConsistentQualifiers(quals);
1403 canon = getExtQualType(canonSplit.Ty, canonSplit.Quals);
1405 // Re-find the insert position.
1406 (void) ExtQualNodes.FindNodeOrInsertPos(ID, insertPos);
1409 ExtQuals *eq = new (*this, TypeAlignment) ExtQuals(baseType, canon, quals);
1410 ExtQualNodes.InsertNode(eq, insertPos);
1411 return QualType(eq, fastQuals);
1415 ASTContext::getAddrSpaceQualType(QualType T, unsigned AddressSpace) const {
1416 QualType CanT = getCanonicalType(T);
1417 if (CanT.getAddressSpace() == AddressSpace)
1420 // If we are composing extended qualifiers together, merge together
1421 // into one ExtQuals node.
1422 QualifierCollector Quals;
1423 const Type *TypeNode = Quals.strip(T);
1425 // If this type already has an address space specified, it cannot get
1427 assert(!Quals.hasAddressSpace() &&
1428 "Type cannot be in multiple addr spaces!");
1429 Quals.addAddressSpace(AddressSpace);
1431 return getExtQualType(TypeNode, Quals);
1434 QualType ASTContext::getObjCGCQualType(QualType T,
1435 Qualifiers::GC GCAttr) const {
1436 QualType CanT = getCanonicalType(T);
1437 if (CanT.getObjCGCAttr() == GCAttr)
1440 if (const PointerType *ptr = T->getAs<PointerType>()) {
1441 QualType Pointee = ptr->getPointeeType();
1442 if (Pointee->isAnyPointerType()) {
1443 QualType ResultType = getObjCGCQualType(Pointee, GCAttr);
1444 return getPointerType(ResultType);
1448 // If we are composing extended qualifiers together, merge together
1449 // into one ExtQuals node.
1450 QualifierCollector Quals;
1451 const Type *TypeNode = Quals.strip(T);
1453 // If this type already has an ObjCGC specified, it cannot get
1455 assert(!Quals.hasObjCGCAttr() &&
1456 "Type cannot have multiple ObjCGCs!");
1457 Quals.addObjCGCAttr(GCAttr);
1459 return getExtQualType(TypeNode, Quals);
1462 const FunctionType *ASTContext::adjustFunctionType(const FunctionType *T,
1463 FunctionType::ExtInfo Info) {
1464 if (T->getExtInfo() == Info)
1468 if (const FunctionNoProtoType *FNPT = dyn_cast<FunctionNoProtoType>(T)) {
1469 Result = getFunctionNoProtoType(FNPT->getResultType(), Info);
1471 const FunctionProtoType *FPT = cast<FunctionProtoType>(T);
1472 FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo();
1474 Result = getFunctionType(FPT->getResultType(), FPT->arg_type_begin(),
1475 FPT->getNumArgs(), EPI);
1478 return cast<FunctionType>(Result.getTypePtr());
1481 /// getComplexType - Return the uniqued reference to the type for a complex
1482 /// number with the specified element type.
1483 QualType ASTContext::getComplexType(QualType T) const {
1484 // Unique pointers, to guarantee there is only one pointer of a particular
1486 llvm::FoldingSetNodeID ID;
1487 ComplexType::Profile(ID, T);
1489 void *InsertPos = 0;
1490 if (ComplexType *CT = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos))
1491 return QualType(CT, 0);
1493 // If the pointee type isn't canonical, this won't be a canonical type either,
1494 // so fill in the canonical type field.
1496 if (!T.isCanonical()) {
1497 Canonical = getComplexType(getCanonicalType(T));
1499 // Get the new insert position for the node we care about.
1500 ComplexType *NewIP = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos);
1501 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP;
1503 ComplexType *New = new (*this, TypeAlignment) ComplexType(T, Canonical);
1504 Types.push_back(New);
1505 ComplexTypes.InsertNode(New, InsertPos);
1506 return QualType(New, 0);
1509 /// getPointerType - Return the uniqued reference to the type for a pointer to
1510 /// the specified type.
1511 QualType ASTContext::getPointerType(QualType T) const {
1512 // Unique pointers, to guarantee there is only one pointer of a particular
1514 llvm::FoldingSetNodeID ID;
1515 PointerType::Profile(ID, T);
1517 void *InsertPos = 0;
1518 if (PointerType *PT = PointerTypes.FindNodeOrInsertPos(ID, InsertPos))
1519 return QualType(PT, 0);
1521 // If the pointee type isn't canonical, this won't be a canonical type either,
1522 // so fill in the canonical type field.
1524 if (!T.isCanonical()) {
1525 Canonical = getPointerType(getCanonicalType(T));
1527 // Get the new insert position for the node we care about.
1528 PointerType *NewIP = PointerTypes.FindNodeOrInsertPos(ID, InsertPos);
1529 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP;
1531 PointerType *New = new (*this, TypeAlignment) PointerType(T, Canonical);
1532 Types.push_back(New);
1533 PointerTypes.InsertNode(New, InsertPos);
1534 return QualType(New, 0);
1537 /// getBlockPointerType - Return the uniqued reference to the type for
1538 /// a pointer to the specified block.
1539 QualType ASTContext::getBlockPointerType(QualType T) const {
1540 assert(T->isFunctionType() && "block of function types only");
1541 // Unique pointers, to guarantee there is only one block of a particular
1543 llvm::FoldingSetNodeID ID;
1544 BlockPointerType::Profile(ID, T);
1546 void *InsertPos = 0;
1547 if (BlockPointerType *PT =
1548 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos))
1549 return QualType(PT, 0);
1551 // If the block pointee type isn't canonical, this won't be a canonical
1552 // type either so fill in the canonical type field.
1554 if (!T.isCanonical()) {
1555 Canonical = getBlockPointerType(getCanonicalType(T));
1557 // Get the new insert position for the node we care about.
1558 BlockPointerType *NewIP =
1559 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos);
1560 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP;
1562 BlockPointerType *New
1563 = new (*this, TypeAlignment) BlockPointerType(T, Canonical);
1564 Types.push_back(New);
1565 BlockPointerTypes.InsertNode(New, InsertPos);
1566 return QualType(New, 0);
1569 /// getLValueReferenceType - Return the uniqued reference to the type for an
1570 /// lvalue reference to the specified type.
1572 ASTContext::getLValueReferenceType(QualType T, bool SpelledAsLValue) const {
1573 assert(getCanonicalType(T) != OverloadTy &&
1574 "Unresolved overloaded function type");
1576 // Unique pointers, to guarantee there is only one pointer of a particular
1578 llvm::FoldingSetNodeID ID;
1579 ReferenceType::Profile(ID, T, SpelledAsLValue);
1581 void *InsertPos = 0;
1582 if (LValueReferenceType *RT =
1583 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos))
1584 return QualType(RT, 0);
1586 const ReferenceType *InnerRef = T->getAs<ReferenceType>();
1588 // If the referencee type isn't canonical, this won't be a canonical type
1589 // either, so fill in the canonical type field.
1591 if (!SpelledAsLValue || InnerRef || !T.isCanonical()) {
1592 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T);
1593 Canonical = getLValueReferenceType(getCanonicalType(PointeeType));
1595 // Get the new insert position for the node we care about.
1596 LValueReferenceType *NewIP =
1597 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos);
1598 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP;
1601 LValueReferenceType *New
1602 = new (*this, TypeAlignment) LValueReferenceType(T, Canonical,
1604 Types.push_back(New);
1605 LValueReferenceTypes.InsertNode(New, InsertPos);
1607 return QualType(New, 0);
1610 /// getRValueReferenceType - Return the uniqued reference to the type for an
1611 /// rvalue reference to the specified type.
1612 QualType ASTContext::getRValueReferenceType(QualType T) const {
1613 // Unique pointers, to guarantee there is only one pointer of a particular
1615 llvm::FoldingSetNodeID ID;
1616 ReferenceType::Profile(ID, T, false);
1618 void *InsertPos = 0;
1619 if (RValueReferenceType *RT =
1620 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos))
1621 return QualType(RT, 0);
1623 const ReferenceType *InnerRef = T->getAs<ReferenceType>();
1625 // If the referencee type isn't canonical, this won't be a canonical type
1626 // either, so fill in the canonical type field.
1628 if (InnerRef || !T.isCanonical()) {
1629 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T);
1630 Canonical = getRValueReferenceType(getCanonicalType(PointeeType));
1632 // Get the new insert position for the node we care about.
1633 RValueReferenceType *NewIP =
1634 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos);
1635 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP;
1638 RValueReferenceType *New
1639 = new (*this, TypeAlignment) RValueReferenceType(T, Canonical);
1640 Types.push_back(New);
1641 RValueReferenceTypes.InsertNode(New, InsertPos);
1642 return QualType(New, 0);
1645 /// getMemberPointerType - Return the uniqued reference to the type for a
1646 /// member pointer to the specified type, in the specified class.
1647 QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls) const {
1648 // Unique pointers, to guarantee there is only one pointer of a particular
1650 llvm::FoldingSetNodeID ID;
1651 MemberPointerType::Profile(ID, T, Cls);
1653 void *InsertPos = 0;
1654 if (MemberPointerType *PT =
1655 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos))
1656 return QualType(PT, 0);
1658 // If the pointee or class type isn't canonical, this won't be a canonical
1659 // type either, so fill in the canonical type field.
1661 if (!T.isCanonical() || !Cls->isCanonicalUnqualified()) {
1662 Canonical = getMemberPointerType(getCanonicalType(T),getCanonicalType(Cls));
1664 // Get the new insert position for the node we care about.
1665 MemberPointerType *NewIP =
1666 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos);
1667 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP;
1669 MemberPointerType *New
1670 = new (*this, TypeAlignment) MemberPointerType(T, Cls, Canonical);
1671 Types.push_back(New);
1672 MemberPointerTypes.InsertNode(New, InsertPos);
1673 return QualType(New, 0);
1676 /// getConstantArrayType - Return the unique reference to the type for an
1677 /// array of the specified element type.
1678 QualType ASTContext::getConstantArrayType(QualType EltTy,
1679 const llvm::APInt &ArySizeIn,
1680 ArrayType::ArraySizeModifier ASM,
1681 unsigned IndexTypeQuals) const {
1682 assert((EltTy->isDependentType() ||
1683 EltTy->isIncompleteType() || EltTy->isConstantSizeType()) &&
1684 "Constant array of VLAs is illegal!");
1686 // Convert the array size into a canonical width matching the pointer size for
1688 llvm::APInt ArySize(ArySizeIn);
1690 ArySize.zextOrTrunc(Target->getPointerWidth(getTargetAddressSpace(EltTy)));
1692 llvm::FoldingSetNodeID ID;
1693 ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, IndexTypeQuals);
1695 void *InsertPos = 0;
1696 if (ConstantArrayType *ATP =
1697 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos))
1698 return QualType(ATP, 0);
1700 // If the element type isn't canonical or has qualifiers, this won't
1701 // be a canonical type either, so fill in the canonical type field.
1703 if (!EltTy.isCanonical() || EltTy.hasLocalQualifiers()) {
1704 SplitQualType canonSplit = getCanonicalType(EltTy).split();
1705 Canon = getConstantArrayType(QualType(canonSplit.Ty, 0), ArySize,
1706 ASM, IndexTypeQuals);
1707 Canon = getQualifiedType(Canon, canonSplit.Quals);
1709 // Get the new insert position for the node we care about.
1710 ConstantArrayType *NewIP =
1711 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos);
1712 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP;
1715 ConstantArrayType *New = new(*this,TypeAlignment)
1716 ConstantArrayType(EltTy, Canon, ArySize, ASM, IndexTypeQuals);
1717 ConstantArrayTypes.InsertNode(New, InsertPos);
1718 Types.push_back(New);
1719 return QualType(New, 0);
1722 /// getVariableArrayDecayedType - Turns the given type, which may be
1723 /// variably-modified, into the corresponding type with all the known
1724 /// sizes replaced with [*].
1725 QualType ASTContext::getVariableArrayDecayedType(QualType type) const {
1726 // Vastly most common case.
1727 if (!type->isVariablyModifiedType()) return type;
1731 SplitQualType split = type.getSplitDesugaredType();
1732 const Type *ty = split.Ty;
1733 switch (ty->getTypeClass()) {
1734 #define TYPE(Class, Base)
1735 #define ABSTRACT_TYPE(Class, Base)
1736 #define NON_CANONICAL_TYPE(Class, Base) case Type::Class:
1737 #include "clang/AST/TypeNodes.def"
1738 llvm_unreachable("didn't desugar past all non-canonical types?");
1740 // These types should never be variably-modified.
1744 case Type::ExtVector:
1745 case Type::DependentSizedExtVector:
1746 case Type::ObjCObject:
1747 case Type::ObjCInterface:
1748 case Type::ObjCObjectPointer:
1751 case Type::UnresolvedUsing:
1752 case Type::TypeOfExpr:
1754 case Type::Decltype:
1755 case Type::UnaryTransform:
1756 case Type::DependentName:
1757 case Type::InjectedClassName:
1758 case Type::TemplateSpecialization:
1759 case Type::DependentTemplateSpecialization:
1760 case Type::TemplateTypeParm:
1761 case Type::SubstTemplateTypeParmPack:
1763 case Type::PackExpansion:
1764 llvm_unreachable("type should never be variably-modified");
1766 // These types can be variably-modified but should never need to
1768 case Type::FunctionNoProto:
1769 case Type::FunctionProto:
1770 case Type::BlockPointer:
1771 case Type::MemberPointer:
1774 // These types can be variably-modified. All these modifications
1775 // preserve structure except as noted by comments.
1776 // TODO: if we ever care about optimizing VLAs, there are no-op
1777 // optimizations available here.
1779 result = getPointerType(getVariableArrayDecayedType(
1780 cast<PointerType>(ty)->getPointeeType()));
1783 case Type::LValueReference: {
1784 const LValueReferenceType *lv = cast<LValueReferenceType>(ty);
1785 result = getLValueReferenceType(
1786 getVariableArrayDecayedType(lv->getPointeeType()),
1787 lv->isSpelledAsLValue());
1791 case Type::RValueReference: {
1792 const RValueReferenceType *lv = cast<RValueReferenceType>(ty);
1793 result = getRValueReferenceType(
1794 getVariableArrayDecayedType(lv->getPointeeType()));
1798 case Type::Atomic: {
1799 const AtomicType *at = cast<AtomicType>(ty);
1800 result = getAtomicType(getVariableArrayDecayedType(at->getValueType()));
1804 case Type::ConstantArray: {
1805 const ConstantArrayType *cat = cast<ConstantArrayType>(ty);
1806 result = getConstantArrayType(
1807 getVariableArrayDecayedType(cat->getElementType()),
1809 cat->getSizeModifier(),
1810 cat->getIndexTypeCVRQualifiers());
1814 case Type::DependentSizedArray: {
1815 const DependentSizedArrayType *dat = cast<DependentSizedArrayType>(ty);
1816 result = getDependentSizedArrayType(
1817 getVariableArrayDecayedType(dat->getElementType()),
1819 dat->getSizeModifier(),
1820 dat->getIndexTypeCVRQualifiers(),
1821 dat->getBracketsRange());
1825 // Turn incomplete types into [*] types.
1826 case Type::IncompleteArray: {
1827 const IncompleteArrayType *iat = cast<IncompleteArrayType>(ty);
1828 result = getVariableArrayType(
1829 getVariableArrayDecayedType(iat->getElementType()),
1832 iat->getIndexTypeCVRQualifiers(),
1837 // Turn VLA types into [*] types.
1838 case Type::VariableArray: {
1839 const VariableArrayType *vat = cast<VariableArrayType>(ty);
1840 result = getVariableArrayType(
1841 getVariableArrayDecayedType(vat->getElementType()),
1844 vat->getIndexTypeCVRQualifiers(),
1845 vat->getBracketsRange());
1850 // Apply the top-level qualifiers from the original.
1851 return getQualifiedType(result, split.Quals);
1854 /// getVariableArrayType - Returns a non-unique reference to the type for a
1855 /// variable array of the specified element type.
1856 QualType ASTContext::getVariableArrayType(QualType EltTy,
1858 ArrayType::ArraySizeModifier ASM,
1859 unsigned IndexTypeQuals,
1860 SourceRange Brackets) const {
1861 // Since we don't unique expressions, it isn't possible to unique VLA's
1862 // that have an expression provided for their size.
1865 // Be sure to pull qualifiers off the element type.
1866 if (!EltTy.isCanonical() || EltTy.hasLocalQualifiers()) {
1867 SplitQualType canonSplit = getCanonicalType(EltTy).split();
1868 Canon = getVariableArrayType(QualType(canonSplit.Ty, 0), NumElts, ASM,
1869 IndexTypeQuals, Brackets);
1870 Canon = getQualifiedType(Canon, canonSplit.Quals);
1873 VariableArrayType *New = new(*this, TypeAlignment)
1874 VariableArrayType(EltTy, Canon, NumElts, ASM, IndexTypeQuals, Brackets);
1876 VariableArrayTypes.push_back(New);
1877 Types.push_back(New);
1878 return QualType(New, 0);
1881 /// getDependentSizedArrayType - Returns a non-unique reference to
1882 /// the type for a dependently-sized array of the specified element
1884 QualType ASTContext::getDependentSizedArrayType(QualType elementType,
1886 ArrayType::ArraySizeModifier ASM,
1887 unsigned elementTypeQuals,
1888 SourceRange brackets) const {
1889 assert((!numElements || numElements->isTypeDependent() ||
1890 numElements->isValueDependent()) &&
1891 "Size must be type- or value-dependent!");
1893 // Dependently-sized array types that do not have a specified number
1894 // of elements will have their sizes deduced from a dependent
1895 // initializer. We do no canonicalization here at all, which is okay
1896 // because they can't be used in most locations.
1898 DependentSizedArrayType *newType
1899 = new (*this, TypeAlignment)
1900 DependentSizedArrayType(*this, elementType, QualType(),
1901 numElements, ASM, elementTypeQuals,
1903 Types.push_back(newType);
1904 return QualType(newType, 0);
1907 // Otherwise, we actually build a new type every time, but we
1908 // also build a canonical type.
1910 SplitQualType canonElementType = getCanonicalType(elementType).split();
1912 void *insertPos = 0;
1913 llvm::FoldingSetNodeID ID;
1914 DependentSizedArrayType::Profile(ID, *this,
1915 QualType(canonElementType.Ty, 0),
1916 ASM, elementTypeQuals, numElements);
1918 // Look for an existing type with these properties.
1919 DependentSizedArrayType *canonTy =
1920 DependentSizedArrayTypes.FindNodeOrInsertPos(ID, insertPos);
1922 // If we don't have one, build one.
1924 canonTy = new (*this, TypeAlignment)
1925 DependentSizedArrayType(*this, QualType(canonElementType.Ty, 0),
1926 QualType(), numElements, ASM, elementTypeQuals,
1928 DependentSizedArrayTypes.InsertNode(canonTy, insertPos);
1929 Types.push_back(canonTy);
1932 // Apply qualifiers from the element type to the array.
1933 QualType canon = getQualifiedType(QualType(canonTy,0),
1934 canonElementType.Quals);
1936 // If we didn't need extra canonicalization for the element type,
1937 // then just use that as our result.
1938 if (QualType(canonElementType.Ty, 0) == elementType)
1941 // Otherwise, we need to build a type which follows the spelling
1942 // of the element type.
1943 DependentSizedArrayType *sugaredType
1944 = new (*this, TypeAlignment)
1945 DependentSizedArrayType(*this, elementType, canon, numElements,
1946 ASM, elementTypeQuals, brackets);
1947 Types.push_back(sugaredType);
1948 return QualType(sugaredType, 0);
1951 QualType ASTContext::getIncompleteArrayType(QualType elementType,
1952 ArrayType::ArraySizeModifier ASM,
1953 unsigned elementTypeQuals) const {
1954 llvm::FoldingSetNodeID ID;
1955 IncompleteArrayType::Profile(ID, elementType, ASM, elementTypeQuals);
1957 void *insertPos = 0;
1958 if (IncompleteArrayType *iat =
1959 IncompleteArrayTypes.FindNodeOrInsertPos(ID, insertPos))
1960 return QualType(iat, 0);
1962 // If the element type isn't canonical, this won't be a canonical type
1963 // either, so fill in the canonical type field. We also have to pull
1964 // qualifiers off the element type.
1967 if (!elementType.isCanonical() || elementType.hasLocalQualifiers()) {
1968 SplitQualType canonSplit = getCanonicalType(elementType).split();
1969 canon = getIncompleteArrayType(QualType(canonSplit.Ty, 0),
1970 ASM, elementTypeQuals);
1971 canon = getQualifiedType(canon, canonSplit.Quals);
1973 // Get the new insert position for the node we care about.
1974 IncompleteArrayType *existing =
1975 IncompleteArrayTypes.FindNodeOrInsertPos(ID, insertPos);
1976 assert(!existing && "Shouldn't be in the map!"); (void) existing;
1979 IncompleteArrayType *newType = new (*this, TypeAlignment)
1980 IncompleteArrayType(elementType, canon, ASM, elementTypeQuals);
1982 IncompleteArrayTypes.InsertNode(newType, insertPos);
1983 Types.push_back(newType);
1984 return QualType(newType, 0);
1987 /// getVectorType - Return the unique reference to a vector type of
1988 /// the specified element type and size. VectorType must be a built-in type.
1989 QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts,
1990 VectorType::VectorKind VecKind) const {
1991 assert(vecType->isBuiltinType());
1993 // Check if we've already instantiated a vector of this type.
1994 llvm::FoldingSetNodeID ID;
1995 VectorType::Profile(ID, vecType, NumElts, Type::Vector, VecKind);
1997 void *InsertPos = 0;
1998 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos))
1999 return QualType(VTP, 0);
2001 // If the element type isn't canonical, this won't be a canonical type either,
2002 // so fill in the canonical type field.
2004 if (!vecType.isCanonical()) {
2005 Canonical = getVectorType(getCanonicalType(vecType), NumElts, VecKind);
2007 // Get the new insert position for the node we care about.
2008 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos);
2009 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP;
2011 VectorType *New = new (*this, TypeAlignment)
2012 VectorType(vecType, NumElts, Canonical, VecKind);
2013 VectorTypes.InsertNode(New, InsertPos);
2014 Types.push_back(New);
2015 return QualType(New, 0);
2018 /// getExtVectorType - Return the unique reference to an extended vector type of
2019 /// the specified element type and size. VectorType must be a built-in type.
2021 ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) const {
2022 assert(vecType->isBuiltinType() || vecType->isDependentType());
2024 // Check if we've already instantiated a vector of this type.
2025 llvm::FoldingSetNodeID ID;
2026 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector,
2027 VectorType::GenericVector);
2028 void *InsertPos = 0;
2029 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos))
2030 return QualType(VTP, 0);
2032 // If the element type isn't canonical, this won't be a canonical type either,
2033 // so fill in the canonical type field.
2035 if (!vecType.isCanonical()) {
2036 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts);
2038 // Get the new insert position for the node we care about.
2039 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos);
2040 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP;
2042 ExtVectorType *New = new (*this, TypeAlignment)
2043 ExtVectorType(vecType, NumElts, Canonical);
2044 VectorTypes.InsertNode(New, InsertPos);
2045 Types.push_back(New);
2046 return QualType(New, 0);
2050 ASTContext::getDependentSizedExtVectorType(QualType vecType,
2052 SourceLocation AttrLoc) const {
2053 llvm::FoldingSetNodeID ID;
2054 DependentSizedExtVectorType::Profile(ID, *this, getCanonicalType(vecType),
2057 void *InsertPos = 0;
2058 DependentSizedExtVectorType *Canon
2059 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos);
2060 DependentSizedExtVectorType *New;
2062 // We already have a canonical version of this array type; use it as
2063 // the canonical type for a newly-built type.
2064 New = new (*this, TypeAlignment)
2065 DependentSizedExtVectorType(*this, vecType, QualType(Canon, 0),
2068 QualType CanonVecTy = getCanonicalType(vecType);
2069 if (CanonVecTy == vecType) {
2070 New = new (*this, TypeAlignment)
2071 DependentSizedExtVectorType(*this, vecType, QualType(), SizeExpr,
2074 DependentSizedExtVectorType *CanonCheck
2075 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos);
2076 assert(!CanonCheck && "Dependent-sized ext_vector canonical type broken");
2078 DependentSizedExtVectorTypes.InsertNode(New, InsertPos);
2080 QualType Canon = getDependentSizedExtVectorType(CanonVecTy, SizeExpr,
2082 New = new (*this, TypeAlignment)
2083 DependentSizedExtVectorType(*this, vecType, Canon, SizeExpr, AttrLoc);
2087 Types.push_back(New);
2088 return QualType(New, 0);
2091 /// getFunctionNoProtoType - Return a K&R style C function type like 'int()'.
2094 ASTContext::getFunctionNoProtoType(QualType ResultTy,
2095 const FunctionType::ExtInfo &Info) const {
2096 const CallingConv DefaultCC = Info.getCC();
2097 const CallingConv CallConv = (LangOpts.MRTD && DefaultCC == CC_Default) ?
2098 CC_X86StdCall : DefaultCC;
2099 // Unique functions, to guarantee there is only one function of a particular
2101 llvm::FoldingSetNodeID ID;
2102 FunctionNoProtoType::Profile(ID, ResultTy, Info);
2104 void *InsertPos = 0;
2105 if (FunctionNoProtoType *FT =
2106 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos))
2107 return QualType(FT, 0);
2110 if (!ResultTy.isCanonical() ||
2111 getCanonicalCallConv(CallConv) != CallConv) {
2113 getFunctionNoProtoType(getCanonicalType(ResultTy),
2114 Info.withCallingConv(getCanonicalCallConv(CallConv)));
2116 // Get the new insert position for the node we care about.
2117 FunctionNoProtoType *NewIP =
2118 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos);
2119 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP;
2122 FunctionProtoType::ExtInfo newInfo = Info.withCallingConv(CallConv);
2123 FunctionNoProtoType *New = new (*this, TypeAlignment)
2124 FunctionNoProtoType(ResultTy, Canonical, newInfo);
2125 Types.push_back(New);
2126 FunctionNoProtoTypes.InsertNode(New, InsertPos);
2127 return QualType(New, 0);
2130 /// getFunctionType - Return a normal function type with a typed argument
2131 /// list. isVariadic indicates whether the argument list includes '...'.
2133 ASTContext::getFunctionType(QualType ResultTy,
2134 const QualType *ArgArray, unsigned NumArgs,
2135 const FunctionProtoType::ExtProtoInfo &EPI) const {
2136 // Unique functions, to guarantee there is only one function of a particular
2138 llvm::FoldingSetNodeID ID;
2139 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, EPI, *this);
2141 void *InsertPos = 0;
2142 if (FunctionProtoType *FTP =
2143 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos))
2144 return QualType(FTP, 0);
2146 // Determine whether the type being created is already canonical or not.
2148 EPI.ExceptionSpecType == EST_None && ResultTy.isCanonical() &&
2149 !EPI.HasTrailingReturn;
2150 for (unsigned i = 0; i != NumArgs && isCanonical; ++i)
2151 if (!ArgArray[i].isCanonicalAsParam())
2152 isCanonical = false;
2154 const CallingConv DefaultCC = EPI.ExtInfo.getCC();
2155 const CallingConv CallConv = (LangOpts.MRTD && DefaultCC == CC_Default) ?
2156 CC_X86StdCall : DefaultCC;
2158 // If this type isn't canonical, get the canonical version of it.
2159 // The exception spec is not part of the canonical type.
2161 if (!isCanonical || getCanonicalCallConv(CallConv) != CallConv) {
2162 SmallVector<QualType, 16> CanonicalArgs;
2163 CanonicalArgs.reserve(NumArgs);
2164 for (unsigned i = 0; i != NumArgs; ++i)
2165 CanonicalArgs.push_back(getCanonicalParamType(ArgArray[i]));
2167 FunctionProtoType::ExtProtoInfo CanonicalEPI = EPI;
2168 CanonicalEPI.HasTrailingReturn = false;
2169 CanonicalEPI.ExceptionSpecType = EST_None;
2170 CanonicalEPI.NumExceptions = 0;
2171 CanonicalEPI.ExtInfo
2172 = CanonicalEPI.ExtInfo.withCallingConv(getCanonicalCallConv(CallConv));
2174 Canonical = getFunctionType(getCanonicalType(ResultTy),
2175 CanonicalArgs.data(), NumArgs,
2178 // Get the new insert position for the node we care about.
2179 FunctionProtoType *NewIP =
2180 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos);
2181 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP;
2184 // FunctionProtoType objects are allocated with extra bytes after
2185 // them for three variable size arrays at the end:
2186 // - parameter types
2187 // - exception types
2188 // - consumed-arguments flags
2189 // Instead of the exception types, there could be a noexcept
2191 size_t Size = sizeof(FunctionProtoType) +
2192 NumArgs * sizeof(QualType);
2193 if (EPI.ExceptionSpecType == EST_Dynamic)
2194 Size += EPI.NumExceptions * sizeof(QualType);
2195 else if (EPI.ExceptionSpecType == EST_ComputedNoexcept) {
2196 Size += sizeof(Expr*);
2197 } else if (EPI.ExceptionSpecType == EST_Uninstantiated) {
2198 Size += 2 * sizeof(FunctionDecl*);
2200 if (EPI.ConsumedArguments)
2201 Size += NumArgs * sizeof(bool);
2203 FunctionProtoType *FTP = (FunctionProtoType*) Allocate(Size, TypeAlignment);
2204 FunctionProtoType::ExtProtoInfo newEPI = EPI;
2205 newEPI.ExtInfo = EPI.ExtInfo.withCallingConv(CallConv);
2206 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, Canonical, newEPI);
2207 Types.push_back(FTP);
2208 FunctionProtoTypes.InsertNode(FTP, InsertPos);
2209 return QualType(FTP, 0);
2213 static bool NeedsInjectedClassNameType(const RecordDecl *D) {
2214 if (!isa<CXXRecordDecl>(D)) return false;
2215 const CXXRecordDecl *RD = cast<CXXRecordDecl>(D);
2216 if (isa<ClassTemplatePartialSpecializationDecl>(RD))
2218 if (RD->getDescribedClassTemplate() &&
2219 !isa<ClassTemplateSpecializationDecl>(RD))
2225 /// getInjectedClassNameType - Return the unique reference to the
2226 /// injected class name type for the specified templated declaration.
2227 QualType ASTContext::getInjectedClassNameType(CXXRecordDecl *Decl,
2228 QualType TST) const {
2229 assert(NeedsInjectedClassNameType(Decl));
2230 if (Decl->TypeForDecl) {
2231 assert(isa<InjectedClassNameType>(Decl->TypeForDecl));
2232 } else if (CXXRecordDecl *PrevDecl = Decl->getPreviousDecl()) {
2233 assert(PrevDecl->TypeForDecl && "previous declaration has no type");
2234 Decl->TypeForDecl = PrevDecl->TypeForDecl;
2235 assert(isa<InjectedClassNameType>(Decl->TypeForDecl));
2238 new (*this, TypeAlignment) InjectedClassNameType(Decl, TST);
2239 Decl->TypeForDecl = newType;
2240 Types.push_back(newType);
2242 return QualType(Decl->TypeForDecl, 0);
2245 /// getTypeDeclType - Return the unique reference to the type for the
2246 /// specified type declaration.
2247 QualType ASTContext::getTypeDeclTypeSlow(const TypeDecl *Decl) const {
2248 assert(Decl && "Passed null for Decl param");
2249 assert(!Decl->TypeForDecl && "TypeForDecl present in slow case");
2251 if (const TypedefNameDecl *Typedef = dyn_cast<TypedefNameDecl>(Decl))
2252 return getTypedefType(Typedef);
2254 assert(!isa<TemplateTypeParmDecl>(Decl) &&
2255 "Template type parameter types are always available.");
2257 if (const RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) {
2258 assert(!Record->getPreviousDecl() &&
2259 "struct/union has previous declaration");
2260 assert(!NeedsInjectedClassNameType(Record));
2261 return getRecordType(Record);
2262 } else if (const EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) {
2263 assert(!Enum->getPreviousDecl() &&
2264 "enum has previous declaration");
2265 return getEnumType(Enum);
2266 } else if (const UnresolvedUsingTypenameDecl *Using =
2267 dyn_cast<UnresolvedUsingTypenameDecl>(Decl)) {
2268 Type *newType = new (*this, TypeAlignment) UnresolvedUsingType(Using);
2269 Decl->TypeForDecl = newType;
2270 Types.push_back(newType);
2272 llvm_unreachable("TypeDecl without a type?");
2274 return QualType(Decl->TypeForDecl, 0);
2277 /// getTypedefType - Return the unique reference to the type for the
2278 /// specified typedef name decl.
2280 ASTContext::getTypedefType(const TypedefNameDecl *Decl,
2281 QualType Canonical) const {
2282 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0);
2284 if (Canonical.isNull())
2285 Canonical = getCanonicalType(Decl->getUnderlyingType());
2286 TypedefType *newType = new(*this, TypeAlignment)
2287 TypedefType(Type::Typedef, Decl, Canonical);
2288 Decl->TypeForDecl = newType;
2289 Types.push_back(newType);
2290 return QualType(newType, 0);
2293 QualType ASTContext::getRecordType(const RecordDecl *Decl) const {
2294 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0);
2296 if (const RecordDecl *PrevDecl = Decl->getPreviousDecl())
2297 if (PrevDecl->TypeForDecl)
2298 return QualType(Decl->TypeForDecl = PrevDecl->TypeForDecl, 0);
2300 RecordType *newType = new (*this, TypeAlignment) RecordType(Decl);
2301 Decl->TypeForDecl = newType;
2302 Types.push_back(newType);
2303 return QualType(newType, 0);
2306 QualType ASTContext::getEnumType(const EnumDecl *Decl) const {
2307 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0);
2309 if (const EnumDecl *PrevDecl = Decl->getPreviousDecl())
2310 if (PrevDecl->TypeForDecl)
2311 return QualType(Decl->TypeForDecl = PrevDecl->TypeForDecl, 0);
2313 EnumType *newType = new (*this, TypeAlignment) EnumType(Decl);
2314 Decl->TypeForDecl = newType;
2315 Types.push_back(newType);
2316 return QualType(newType, 0);
2319 QualType ASTContext::getAttributedType(AttributedType::Kind attrKind,
2320 QualType modifiedType,
2321 QualType equivalentType) {
2322 llvm::FoldingSetNodeID id;
2323 AttributedType::Profile(id, attrKind, modifiedType, equivalentType);
2325 void *insertPos = 0;
2326 AttributedType *type = AttributedTypes.FindNodeOrInsertPos(id, insertPos);
2327 if (type) return QualType(type, 0);
2329 QualType canon = getCanonicalType(equivalentType);
2330 type = new (*this, TypeAlignment)
2331 AttributedType(canon, attrKind, modifiedType, equivalentType);
2333 Types.push_back(type);
2334 AttributedTypes.InsertNode(type, insertPos);
2336 return QualType(type, 0);
2340 /// \brief Retrieve a substitution-result type.
2342 ASTContext::getSubstTemplateTypeParmType(const TemplateTypeParmType *Parm,
2343 QualType Replacement) const {
2344 assert(Replacement.isCanonical()
2345 && "replacement types must always be canonical");
2347 llvm::FoldingSetNodeID ID;
2348 SubstTemplateTypeParmType::Profile(ID, Parm, Replacement);
2349 void *InsertPos = 0;
2350 SubstTemplateTypeParmType *SubstParm
2351 = SubstTemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos);
2354 SubstParm = new (*this, TypeAlignment)
2355 SubstTemplateTypeParmType(Parm, Replacement);
2356 Types.push_back(SubstParm);
2357 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos);
2360 return QualType(SubstParm, 0);
2363 /// \brief Retrieve a
2364 QualType ASTContext::getSubstTemplateTypeParmPackType(
2365 const TemplateTypeParmType *Parm,
2366 const TemplateArgument &ArgPack) {
2368 for (TemplateArgument::pack_iterator P = ArgPack.pack_begin(),
2369 PEnd = ArgPack.pack_end();
2371 assert(P->getKind() == TemplateArgument::Type &&"Pack contains a non-type");
2372 assert(P->getAsType().isCanonical() && "Pack contains non-canonical type");
2376 llvm::FoldingSetNodeID ID;
2377 SubstTemplateTypeParmPackType::Profile(ID, Parm, ArgPack);
2378 void *InsertPos = 0;
2379 if (SubstTemplateTypeParmPackType *SubstParm
2380 = SubstTemplateTypeParmPackTypes.FindNodeOrInsertPos(ID, InsertPos))
2381 return QualType(SubstParm, 0);
2384 if (!Parm->isCanonicalUnqualified()) {
2385 Canon = getCanonicalType(QualType(Parm, 0));
2386 Canon = getSubstTemplateTypeParmPackType(cast<TemplateTypeParmType>(Canon),
2388 SubstTemplateTypeParmPackTypes.FindNodeOrInsertPos(ID, InsertPos);
2391 SubstTemplateTypeParmPackType *SubstParm
2392 = new (*this, TypeAlignment) SubstTemplateTypeParmPackType(Parm, Canon,
2394 Types.push_back(SubstParm);
2395 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos);
2396 return QualType(SubstParm, 0);
2399 /// \brief Retrieve the template type parameter type for a template
2400 /// parameter or parameter pack with the given depth, index, and (optionally)
2402 QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index,
2404 TemplateTypeParmDecl *TTPDecl) const {
2405 llvm::FoldingSetNodeID ID;
2406 TemplateTypeParmType::Profile(ID, Depth, Index, ParameterPack, TTPDecl);
2407 void *InsertPos = 0;
2408 TemplateTypeParmType *TypeParm
2409 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos);
2412 return QualType(TypeParm, 0);
2415 QualType Canon = getTemplateTypeParmType(Depth, Index, ParameterPack);
2416 TypeParm = new (*this, TypeAlignment) TemplateTypeParmType(TTPDecl, Canon);
2418 TemplateTypeParmType *TypeCheck
2419 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos);
2420 assert(!TypeCheck && "Template type parameter canonical type broken");
2423 TypeParm = new (*this, TypeAlignment)
2424 TemplateTypeParmType(Depth, Index, ParameterPack);
2426 Types.push_back(TypeParm);
2427 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos);
2429 return QualType(TypeParm, 0);
2433 ASTContext::getTemplateSpecializationTypeInfo(TemplateName Name,
2434 SourceLocation NameLoc,
2435 const TemplateArgumentListInfo &Args,
2436 QualType Underlying) const {
2437 assert(!Name.getAsDependentTemplateName() &&
2438 "No dependent template names here!");
2439 QualType TST = getTemplateSpecializationType(Name, Args, Underlying);
2441 TypeSourceInfo *DI = CreateTypeSourceInfo(TST);
2442 TemplateSpecializationTypeLoc TL
2443 = cast<TemplateSpecializationTypeLoc>(DI->getTypeLoc());
2444 TL.setTemplateKeywordLoc(SourceLocation());
2445 TL.setTemplateNameLoc(NameLoc);
2446 TL.setLAngleLoc(Args.getLAngleLoc());
2447 TL.setRAngleLoc(Args.getRAngleLoc());
2448 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i)
2449 TL.setArgLocInfo(i, Args[i].getLocInfo());
2454 ASTContext::getTemplateSpecializationType(TemplateName Template,
2455 const TemplateArgumentListInfo &Args,
2456 QualType Underlying) const {
2457 assert(!Template.getAsDependentTemplateName() &&
2458 "No dependent template names here!");
2460 unsigned NumArgs = Args.size();
2462 SmallVector<TemplateArgument, 4> ArgVec;
2463 ArgVec.reserve(NumArgs);
2464 for (unsigned i = 0; i != NumArgs; ++i)
2465 ArgVec.push_back(Args[i].getArgument());
2467 return getTemplateSpecializationType(Template, ArgVec.data(), NumArgs,
2472 static bool hasAnyPackExpansions(const TemplateArgument *Args,
2474 for (unsigned I = 0; I != NumArgs; ++I)
2475 if (Args[I].isPackExpansion())
2483 ASTContext::getTemplateSpecializationType(TemplateName Template,
2484 const TemplateArgument *Args,
2486 QualType Underlying) const {
2487 assert(!Template.getAsDependentTemplateName() &&
2488 "No dependent template names here!");
2489 // Look through qualified template names.
2490 if (QualifiedTemplateName *QTN = Template.getAsQualifiedTemplateName())
2491 Template = TemplateName(QTN->getTemplateDecl());
2494 Template.getAsTemplateDecl() &&
2495 isa<TypeAliasTemplateDecl>(Template.getAsTemplateDecl());
2497 if (!Underlying.isNull())
2498 CanonType = getCanonicalType(Underlying);
2500 // We can get here with an alias template when the specialization contains
2501 // a pack expansion that does not match up with a parameter pack.
2502 assert((!IsTypeAlias || hasAnyPackExpansions(Args, NumArgs)) &&
2503 "Caller must compute aliased type");
2504 IsTypeAlias = false;
2505 CanonType = getCanonicalTemplateSpecializationType(Template, Args,
2509 // Allocate the (non-canonical) template specialization type, but don't
2510 // try to unique it: these types typically have location information that
2511 // we don't unique and don't want to lose.
2512 void *Mem = Allocate(sizeof(TemplateSpecializationType) +
2513 sizeof(TemplateArgument) * NumArgs +
2514 (IsTypeAlias? sizeof(QualType) : 0),
2516 TemplateSpecializationType *Spec
2517 = new (Mem) TemplateSpecializationType(Template, Args, NumArgs, CanonType,
2518 IsTypeAlias ? Underlying : QualType());
2520 Types.push_back(Spec);
2521 return QualType(Spec, 0);
2525 ASTContext::getCanonicalTemplateSpecializationType(TemplateName Template,
2526 const TemplateArgument *Args,
2527 unsigned NumArgs) const {
2528 assert(!Template.getAsDependentTemplateName() &&
2529 "No dependent template names here!");
2531 // Look through qualified template names.
2532 if (QualifiedTemplateName *QTN = Template.getAsQualifiedTemplateName())
2533 Template = TemplateName(QTN->getTemplateDecl());
2535 // Build the canonical template specialization type.
2536 TemplateName CanonTemplate = getCanonicalTemplateName(Template);
2537 SmallVector<TemplateArgument, 4> CanonArgs;
2538 CanonArgs.reserve(NumArgs);
2539 for (unsigned I = 0; I != NumArgs; ++I)
2540 CanonArgs.push_back(getCanonicalTemplateArgument(Args[I]));
2542 // Determine whether this canonical template specialization type already
2544 llvm::FoldingSetNodeID ID;
2545 TemplateSpecializationType::Profile(ID, CanonTemplate,
2546 CanonArgs.data(), NumArgs, *this);
2548 void *InsertPos = 0;
2549 TemplateSpecializationType *Spec
2550 = TemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos);
2553 // Allocate a new canonical template specialization type.
2554 void *Mem = Allocate((sizeof(TemplateSpecializationType) +
2555 sizeof(TemplateArgument) * NumArgs),
2557 Spec = new (Mem) TemplateSpecializationType(CanonTemplate,
2558 CanonArgs.data(), NumArgs,
2559 QualType(), QualType());
2560 Types.push_back(Spec);
2561 TemplateSpecializationTypes.InsertNode(Spec, InsertPos);
2564 assert(Spec->isDependentType() &&
2565 "Non-dependent template-id type must have a canonical type");
2566 return QualType(Spec, 0);
2570 ASTContext::getElaboratedType(ElaboratedTypeKeyword Keyword,
2571 NestedNameSpecifier *NNS,
2572 QualType NamedType) const {
2573 llvm::FoldingSetNodeID ID;
2574 ElaboratedType::Profile(ID, Keyword, NNS, NamedType);
2576 void *InsertPos = 0;
2577 ElaboratedType *T = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos);
2579 return QualType(T, 0);
2581 QualType Canon = NamedType;
2582 if (!Canon.isCanonical()) {
2583 Canon = getCanonicalType(NamedType);
2584 ElaboratedType *CheckT = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos);
2585 assert(!CheckT && "Elaborated canonical type broken");
2589 T = new (*this) ElaboratedType(Keyword, NNS, NamedType, Canon);
2591 ElaboratedTypes.InsertNode(T, InsertPos);
2592 return QualType(T, 0);
2596 ASTContext::getParenType(QualType InnerType) const {
2597 llvm::FoldingSetNodeID ID;
2598 ParenType::Profile(ID, InnerType);
2600 void *InsertPos = 0;
2601 ParenType *T = ParenTypes.FindNodeOrInsertPos(ID, InsertPos);
2603 return QualType(T, 0);
2605 QualType Canon = InnerType;
2606 if (!Canon.isCanonical()) {
2607 Canon = getCanonicalType(InnerType);
2608 ParenType *CheckT = ParenTypes.FindNodeOrInsertPos(ID, InsertPos);
2609 assert(!CheckT && "Paren canonical type broken");
2613 T = new (*this) ParenType(InnerType, Canon);
2615 ParenTypes.InsertNode(T, InsertPos);
2616 return QualType(T, 0);
2619 QualType ASTContext::getDependentNameType(ElaboratedTypeKeyword Keyword,
2620 NestedNameSpecifier *NNS,
2621 const IdentifierInfo *Name,
2622 QualType Canon) const {
2623 assert(NNS->isDependent() && "nested-name-specifier must be dependent");
2625 if (Canon.isNull()) {
2626 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS);
2627 ElaboratedTypeKeyword CanonKeyword = Keyword;
2628 if (Keyword == ETK_None)
2629 CanonKeyword = ETK_Typename;
2631 if (CanonNNS != NNS || CanonKeyword != Keyword)
2632 Canon = getDependentNameType(CanonKeyword, CanonNNS, Name);
2635 llvm::FoldingSetNodeID ID;
2636 DependentNameType::Profile(ID, Keyword, NNS, Name);
2638 void *InsertPos = 0;
2639 DependentNameType *T
2640 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos);
2642 return QualType(T, 0);
2644 T = new (*this) DependentNameType(Keyword, NNS, Name, Canon);
2646 DependentNameTypes.InsertNode(T, InsertPos);
2647 return QualType(T, 0);
2651 ASTContext::getDependentTemplateSpecializationType(
2652 ElaboratedTypeKeyword Keyword,
2653 NestedNameSpecifier *NNS,
2654 const IdentifierInfo *Name,
2655 const TemplateArgumentListInfo &Args) const {
2656 // TODO: avoid this copy
2657 SmallVector<TemplateArgument, 16> ArgCopy;
2658 for (unsigned I = 0, E = Args.size(); I != E; ++I)
2659 ArgCopy.push_back(Args[I].getArgument());
2660 return getDependentTemplateSpecializationType(Keyword, NNS, Name,
2666 ASTContext::getDependentTemplateSpecializationType(
2667 ElaboratedTypeKeyword Keyword,
2668 NestedNameSpecifier *NNS,
2669 const IdentifierInfo *Name,
2671 const TemplateArgument *Args) const {
2672 assert((!NNS || NNS->isDependent()) &&
2673 "nested-name-specifier must be dependent");
2675 llvm::FoldingSetNodeID ID;
2676 DependentTemplateSpecializationType::Profile(ID, *this, Keyword, NNS,
2677 Name, NumArgs, Args);
2679 void *InsertPos = 0;
2680 DependentTemplateSpecializationType *T
2681 = DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos);
2683 return QualType(T, 0);
2685 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS);
2687 ElaboratedTypeKeyword CanonKeyword = Keyword;
2688 if (Keyword == ETK_None) CanonKeyword = ETK_Typename;
2690 bool AnyNonCanonArgs = false;
2691 SmallVector<TemplateArgument, 16> CanonArgs(NumArgs);
2692 for (unsigned I = 0; I != NumArgs; ++I) {
2693 CanonArgs[I] = getCanonicalTemplateArgument(Args[I]);
2694 if (!CanonArgs[I].structurallyEquals(Args[I]))
2695 AnyNonCanonArgs = true;
2699 if (AnyNonCanonArgs || CanonNNS != NNS || CanonKeyword != Keyword) {
2700 Canon = getDependentTemplateSpecializationType(CanonKeyword, CanonNNS,
2704 // Find the insert position again.
2705 DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos);
2708 void *Mem = Allocate((sizeof(DependentTemplateSpecializationType) +
2709 sizeof(TemplateArgument) * NumArgs),
2711 T = new (Mem) DependentTemplateSpecializationType(Keyword, NNS,
2712 Name, NumArgs, Args, Canon);
2714 DependentTemplateSpecializationTypes.InsertNode(T, InsertPos);
2715 return QualType(T, 0);
2718 QualType ASTContext::getPackExpansionType(QualType Pattern,
2719 llvm::Optional<unsigned> NumExpansions) {
2720 llvm::FoldingSetNodeID ID;
2721 PackExpansionType::Profile(ID, Pattern, NumExpansions);
2723 assert(Pattern->containsUnexpandedParameterPack() &&
2724 "Pack expansions must expand one or more parameter packs");
2725 void *InsertPos = 0;
2726 PackExpansionType *T
2727 = PackExpansionTypes.FindNodeOrInsertPos(ID, InsertPos);
2729 return QualType(T, 0);
2732 if (!Pattern.isCanonical()) {
2733 Canon = getPackExpansionType(getCanonicalType(Pattern), NumExpansions);
2735 // Find the insert position again.
2736 PackExpansionTypes.FindNodeOrInsertPos(ID, InsertPos);
2739 T = new (*this) PackExpansionType(Pattern, Canon, NumExpansions);
2741 PackExpansionTypes.InsertNode(T, InsertPos);
2742 return QualType(T, 0);
2745 /// CmpProtocolNames - Comparison predicate for sorting protocols
2747 static bool CmpProtocolNames(const ObjCProtocolDecl *LHS,
2748 const ObjCProtocolDecl *RHS) {
2749 return LHS->getDeclName() < RHS->getDeclName();
2752 static bool areSortedAndUniqued(ObjCProtocolDecl * const *Protocols,
2753 unsigned NumProtocols) {
2754 if (NumProtocols == 0) return true;
2756 if (Protocols[0]->getCanonicalDecl() != Protocols[0])
2759 for (unsigned i = 1; i != NumProtocols; ++i)
2760 if (!CmpProtocolNames(Protocols[i-1], Protocols[i]) ||
2761 Protocols[i]->getCanonicalDecl() != Protocols[i])
2766 static void SortAndUniqueProtocols(ObjCProtocolDecl **Protocols,
2767 unsigned &NumProtocols) {
2768 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols;
2770 // Sort protocols, keyed by name.
2771 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames);
2774 for (unsigned I = 0, N = NumProtocols; I != N; ++I)
2775 Protocols[I] = Protocols[I]->getCanonicalDecl();
2777 // Remove duplicates.
2778 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd);
2779 NumProtocols = ProtocolsEnd-Protocols;
2782 QualType ASTContext::getObjCObjectType(QualType BaseType,
2783 ObjCProtocolDecl * const *Protocols,
2784 unsigned NumProtocols) const {
2785 // If the base type is an interface and there aren't any protocols
2786 // to add, then the interface type will do just fine.
2787 if (!NumProtocols && isa<ObjCInterfaceType>(BaseType))
2790 // Look in the folding set for an existing type.
2791 llvm::FoldingSetNodeID ID;
2792 ObjCObjectTypeImpl::Profile(ID, BaseType, Protocols, NumProtocols);
2793 void *InsertPos = 0;
2794 if (ObjCObjectType *QT = ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos))
2795 return QualType(QT, 0);
2797 // Build the canonical type, which has the canonical base type and
2798 // a sorted-and-uniqued list of protocols.
2800 bool ProtocolsSorted = areSortedAndUniqued(Protocols, NumProtocols);
2801 if (!ProtocolsSorted || !BaseType.isCanonical()) {
2802 if (!ProtocolsSorted) {
2803 SmallVector<ObjCProtocolDecl*, 8> Sorted(Protocols,
2804 Protocols + NumProtocols);
2805 unsigned UniqueCount = NumProtocols;
2807 SortAndUniqueProtocols(&Sorted[0], UniqueCount);
2808 Canonical = getObjCObjectType(getCanonicalType(BaseType),
2809 &Sorted[0], UniqueCount);
2811 Canonical = getObjCObjectType(getCanonicalType(BaseType),
2812 Protocols, NumProtocols);
2815 // Regenerate InsertPos.
2816 ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos);
2819 unsigned Size = sizeof(ObjCObjectTypeImpl);
2820 Size += NumProtocols * sizeof(ObjCProtocolDecl *);
2821 void *Mem = Allocate(Size, TypeAlignment);
2822 ObjCObjectTypeImpl *T =
2823 new (Mem) ObjCObjectTypeImpl(Canonical, BaseType, Protocols, NumProtocols);
2826 ObjCObjectTypes.InsertNode(T, InsertPos);
2827 return QualType(T, 0);
2830 /// getObjCObjectPointerType - Return a ObjCObjectPointerType type for
2831 /// the given object type.
2832 QualType ASTContext::getObjCObjectPointerType(QualType ObjectT) const {
2833 llvm::FoldingSetNodeID ID;
2834 ObjCObjectPointerType::Profile(ID, ObjectT);
2836 void *InsertPos = 0;
2837 if (ObjCObjectPointerType *QT =
2838 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos))
2839 return QualType(QT, 0);
2841 // Find the canonical object type.
2843 if (!ObjectT.isCanonical()) {
2844 Canonical = getObjCObjectPointerType(getCanonicalType(ObjectT));
2846 // Regenerate InsertPos.
2847 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos);
2851 void *Mem = Allocate(sizeof(ObjCObjectPointerType), TypeAlignment);
2852 ObjCObjectPointerType *QType =
2853 new (Mem) ObjCObjectPointerType(Canonical, ObjectT);
2855 Types.push_back(QType);
2856 ObjCObjectPointerTypes.InsertNode(QType, InsertPos);
2857 return QualType(QType, 0);
2860 /// getObjCInterfaceType - Return the unique reference to the type for the
2861 /// specified ObjC interface decl. The list of protocols is optional.
2862 QualType ASTContext::getObjCInterfaceType(const ObjCInterfaceDecl *Decl,
2863 ObjCInterfaceDecl *PrevDecl) const {
2864 if (Decl->TypeForDecl)
2865 return QualType(Decl->TypeForDecl, 0);
2868 assert(PrevDecl->TypeForDecl && "previous decl has no TypeForDecl");
2869 Decl->TypeForDecl = PrevDecl->TypeForDecl;
2870 return QualType(PrevDecl->TypeForDecl, 0);
2873 // Prefer the definition, if there is one.
2874 if (const ObjCInterfaceDecl *Def = Decl->getDefinition())
2877 void *Mem = Allocate(sizeof(ObjCInterfaceType), TypeAlignment);
2878 ObjCInterfaceType *T = new (Mem) ObjCInterfaceType(Decl);
2879 Decl->TypeForDecl = T;
2881 return QualType(T, 0);
2884 /// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique
2885 /// TypeOfExprType AST's (since expression's are never shared). For example,
2886 /// multiple declarations that refer to "typeof(x)" all contain different
2887 /// DeclRefExpr's. This doesn't effect the type checker, since it operates
2888 /// on canonical type's (which are always unique).
2889 QualType ASTContext::getTypeOfExprType(Expr *tofExpr) const {
2890 TypeOfExprType *toe;
2891 if (tofExpr->isTypeDependent()) {
2892 llvm::FoldingSetNodeID ID;
2893 DependentTypeOfExprType::Profile(ID, *this, tofExpr);
2895 void *InsertPos = 0;
2896 DependentTypeOfExprType *Canon
2897 = DependentTypeOfExprTypes.FindNodeOrInsertPos(ID, InsertPos);
2899 // We already have a "canonical" version of an identical, dependent
2900 // typeof(expr) type. Use that as our canonical type.
2901 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr,
2902 QualType((TypeOfExprType*)Canon, 0));
2904 // Build a new, canonical typeof(expr) type.
2906 = new (*this, TypeAlignment) DependentTypeOfExprType(*this, tofExpr);
2907 DependentTypeOfExprTypes.InsertNode(Canon, InsertPos);
2911 QualType Canonical = getCanonicalType(tofExpr->getType());
2912 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, Canonical);
2914 Types.push_back(toe);
2915 return QualType(toe, 0);
2918 /// getTypeOfType - Unlike many "get<Type>" functions, we don't unique
2919 /// TypeOfType AST's. The only motivation to unique these nodes would be
2920 /// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be
2921 /// an issue. This doesn't effect the type checker, since it operates
2922 /// on canonical type's (which are always unique).
2923 QualType ASTContext::getTypeOfType(QualType tofType) const {
2924 QualType Canonical = getCanonicalType(tofType);
2925 TypeOfType *tot = new (*this, TypeAlignment) TypeOfType(tofType, Canonical);
2926 Types.push_back(tot);
2927 return QualType(tot, 0);
2931 /// getDecltypeType - Unlike many "get<Type>" functions, we don't unique
2932 /// DecltypeType AST's. The only motivation to unique these nodes would be
2933 /// memory savings. Since decltype(t) is fairly uncommon, space shouldn't be
2934 /// an issue. This doesn't effect the type checker, since it operates
2935 /// on canonical types (which are always unique).
2936 QualType ASTContext::getDecltypeType(Expr *e, QualType UnderlyingType) const {
2939 // C++0x [temp.type]p2:
2940 // If an expression e involves a template parameter, decltype(e) denotes a
2941 // unique dependent type. Two such decltype-specifiers refer to the same
2942 // type only if their expressions are equivalent (14.5.6.1).
2943 if (e->isInstantiationDependent()) {
2944 llvm::FoldingSetNodeID ID;
2945 DependentDecltypeType::Profile(ID, *this, e);
2947 void *InsertPos = 0;
2948 DependentDecltypeType *Canon
2949 = DependentDecltypeTypes.FindNodeOrInsertPos(ID, InsertPos);
2951 // We already have a "canonical" version of an equivalent, dependent
2952 // decltype type. Use that as our canonical type.
2953 dt = new (*this, TypeAlignment) DecltypeType(e, DependentTy,
2954 QualType((DecltypeType*)Canon, 0));
2956 // Build a new, canonical typeof(expr) type.
2957 Canon = new (*this, TypeAlignment) DependentDecltypeType(*this, e);
2958 DependentDecltypeTypes.InsertNode(Canon, InsertPos);
2962 dt = new (*this, TypeAlignment) DecltypeType(e, UnderlyingType,
2963 getCanonicalType(UnderlyingType));
2965 Types.push_back(dt);
2966 return QualType(dt, 0);
2969 /// getUnaryTransformationType - We don't unique these, since the memory
2970 /// savings are minimal and these are rare.
2971 QualType ASTContext::getUnaryTransformType(QualType BaseType,
2972 QualType UnderlyingType,
2973 UnaryTransformType::UTTKind Kind)
2975 UnaryTransformType *Ty =
2976 new (*this, TypeAlignment) UnaryTransformType (BaseType, UnderlyingType,
2978 UnderlyingType->isDependentType() ?
2979 QualType() : getCanonicalType(UnderlyingType));
2980 Types.push_back(Ty);
2981 return QualType(Ty, 0);
2984 /// getAutoType - We only unique auto types after they've been deduced.
2985 QualType ASTContext::getAutoType(QualType DeducedType) const {
2986 void *InsertPos = 0;
2987 if (!DeducedType.isNull()) {
2988 // Look in the folding set for an existing type.
2989 llvm::FoldingSetNodeID ID;
2990 AutoType::Profile(ID, DeducedType);
2991 if (AutoType *AT = AutoTypes.FindNodeOrInsertPos(ID, InsertPos))
2992 return QualType(AT, 0);
2995 AutoType *AT = new (*this, TypeAlignment) AutoType(DeducedType);
2996 Types.push_back(AT);
2998 AutoTypes.InsertNode(AT, InsertPos);
2999 return QualType(AT, 0);
3002 /// getAtomicType - Return the uniqued reference to the atomic type for
3003 /// the given value type.
3004 QualType ASTContext::getAtomicType(QualType T) const {
3005 // Unique pointers, to guarantee there is only one pointer of a particular
3007 llvm::FoldingSetNodeID ID;
3008 AtomicType::Profile(ID, T);
3010 void *InsertPos = 0;
3011 if (AtomicType *AT = AtomicTypes.FindNodeOrInsertPos(ID, InsertPos))
3012 return QualType(AT, 0);
3014 // If the atomic value type isn't canonical, this won't be a canonical type
3015 // either, so fill in the canonical type field.
3017 if (!T.isCanonical()) {
3018 Canonical = getAtomicType(getCanonicalType(T));
3020 // Get the new insert position for the node we care about.
3021 AtomicType *NewIP = AtomicTypes.FindNodeOrInsertPos(ID, InsertPos);
3022 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP;
3024 AtomicType *New = new (*this, TypeAlignment) AtomicType(T, Canonical);
3025 Types.push_back(New);
3026 AtomicTypes.InsertNode(New, InsertPos);
3027 return QualType(New, 0);
3030 /// getAutoDeductType - Get type pattern for deducing against 'auto'.
3031 QualType ASTContext::getAutoDeductType() const {
3032 if (AutoDeductTy.isNull())
3033 AutoDeductTy = getAutoType(QualType());
3034 assert(!AutoDeductTy.isNull() && "can't build 'auto' pattern");
3035 return AutoDeductTy;
3038 /// getAutoRRefDeductType - Get type pattern for deducing against 'auto &&'.
3039 QualType ASTContext::getAutoRRefDeductType() const {
3040 if (AutoRRefDeductTy.isNull())
3041 AutoRRefDeductTy = getRValueReferenceType(getAutoDeductType());
3042 assert(!AutoRRefDeductTy.isNull() && "can't build 'auto &&' pattern");
3043 return AutoRRefDeductTy;
3046 /// getTagDeclType - Return the unique reference to the type for the
3047 /// specified TagDecl (struct/union/class/enum) decl.
3048 QualType ASTContext::getTagDeclType(const TagDecl *Decl) const {
3050 // FIXME: What is the design on getTagDeclType when it requires casting
3051 // away const? mutable?
3052 return getTypeDeclType(const_cast<TagDecl*>(Decl));
3055 /// getSizeType - Return the unique type for "size_t" (C99 7.17), the result
3056 /// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and
3057 /// needs to agree with the definition in <stddef.h>.
3058 CanQualType ASTContext::getSizeType() const {
3059 return getFromTargetType(Target->getSizeType());
3062 /// getIntMaxType - Return the unique type for "intmax_t" (C99 7.18.1.5).
3063 CanQualType ASTContext::getIntMaxType() const {
3064 return getFromTargetType(Target->getIntMaxType());
3067 /// getUIntMaxType - Return the unique type for "uintmax_t" (C99 7.18.1.5).
3068 CanQualType ASTContext::getUIntMaxType() const {
3069 return getFromTargetType(Target->getUIntMaxType());
3072 /// getSignedWCharType - Return the type of "signed wchar_t".
3073 /// Used when in C++, as a GCC extension.
3074 QualType ASTContext::getSignedWCharType() const {
3075 // FIXME: derive from "Target" ?
3079 /// getUnsignedWCharType - Return the type of "unsigned wchar_t".
3080 /// Used when in C++, as a GCC extension.
3081 QualType ASTContext::getUnsignedWCharType() const {
3082 // FIXME: derive from "Target" ?
3083 return UnsignedIntTy;
3086 /// getPointerDiffType - Return the unique type for "ptrdiff_t" (C99 7.17)
3087 /// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9).
3088 QualType ASTContext::getPointerDiffType() const {
3089 return getFromTargetType(Target->getPtrDiffType(0));
3092 //===----------------------------------------------------------------------===//
3094 //===----------------------------------------------------------------------===//
3096 CanQualType ASTContext::getCanonicalParamType(QualType T) const {
3097 // Push qualifiers into arrays, and then discard any remaining
3099 T = getCanonicalType(T);
3100 T = getVariableArrayDecayedType(T);
3101 const Type *Ty = T.getTypePtr();
3103 if (isa<ArrayType>(Ty)) {
3104 Result = getArrayDecayedType(QualType(Ty,0));
3105 } else if (isa<FunctionType>(Ty)) {
3106 Result = getPointerType(QualType(Ty, 0));
3108 Result = QualType(Ty, 0);
3111 return CanQualType::CreateUnsafe(Result);
3114 QualType ASTContext::getUnqualifiedArrayType(QualType type,
3115 Qualifiers &quals) {
3116 SplitQualType splitType = type.getSplitUnqualifiedType();
3118 // FIXME: getSplitUnqualifiedType() actually walks all the way to
3119 // the unqualified desugared type and then drops it on the floor.
3120 // We then have to strip that sugar back off with
3121 // getUnqualifiedDesugaredType(), which is silly.
3122 const ArrayType *AT =
3123 dyn_cast<ArrayType>(splitType.Ty->getUnqualifiedDesugaredType());
3125 // If we don't have an array, just use the results in splitType.
3127 quals = splitType.Quals;
3128 return QualType(splitType.Ty, 0);
3131 // Otherwise, recurse on the array's element type.
3132 QualType elementType = AT->getElementType();
3133 QualType unqualElementType = getUnqualifiedArrayType(elementType, quals);
3135 // If that didn't change the element type, AT has no qualifiers, so we
3136 // can just use the results in splitType.
3137 if (elementType == unqualElementType) {
3138 assert(quals.empty()); // from the recursive call
3139 quals = splitType.Quals;
3140 return QualType(splitType.Ty, 0);
3143 // Otherwise, add in the qualifiers from the outermost type, then
3144 // build the type back up.
3145 quals.addConsistentQualifiers(splitType.Quals);
3147 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) {
3148 return getConstantArrayType(unqualElementType, CAT->getSize(),
3149 CAT->getSizeModifier(), 0);
3152 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) {
3153 return getIncompleteArrayType(unqualElementType, IAT->getSizeModifier(), 0);
3156 if (const VariableArrayType *VAT = dyn_cast<VariableArrayType>(AT)) {
3157 return getVariableArrayType(unqualElementType,
3159 VAT->getSizeModifier(),
3160 VAT->getIndexTypeCVRQualifiers(),
3161 VAT->getBracketsRange());
3164 const DependentSizedArrayType *DSAT = cast<DependentSizedArrayType>(AT);
3165 return getDependentSizedArrayType(unqualElementType, DSAT->getSizeExpr(),
3166 DSAT->getSizeModifier(), 0,
3170 /// UnwrapSimilarPointerTypes - If T1 and T2 are pointer types that
3171 /// may be similar (C++ 4.4), replaces T1 and T2 with the type that
3172 /// they point to and return true. If T1 and T2 aren't pointer types
3173 /// or pointer-to-member types, or if they are not similar at this
3174 /// level, returns false and leaves T1 and T2 unchanged. Top-level
3175 /// qualifiers on T1 and T2 are ignored. This function will typically
3176 /// be called in a loop that successively "unwraps" pointer and
3177 /// pointer-to-member types to compare them at each level.
3178 bool ASTContext::UnwrapSimilarPointerTypes(QualType &T1, QualType &T2) {
3179 const PointerType *T1PtrType = T1->getAs<PointerType>(),
3180 *T2PtrType = T2->getAs<PointerType>();
3181 if (T1PtrType && T2PtrType) {
3182 T1 = T1PtrType->getPointeeType();
3183 T2 = T2PtrType->getPointeeType();
3187 const MemberPointerType *T1MPType = T1->getAs<MemberPointerType>(),
3188 *T2MPType = T2->getAs<MemberPointerType>();
3189 if (T1MPType && T2MPType &&
3190 hasSameUnqualifiedType(QualType(T1MPType->getClass(), 0),
3191 QualType(T2MPType->getClass(), 0))) {
3192 T1 = T1MPType->getPointeeType();
3193 T2 = T2MPType->getPointeeType();
3197 if (getLangOpts().ObjC1) {
3198 const ObjCObjectPointerType *T1OPType = T1->getAs<ObjCObjectPointerType>(),
3199 *T2OPType = T2->getAs<ObjCObjectPointerType>();
3200 if (T1OPType && T2OPType) {
3201 T1 = T1OPType->getPointeeType();
3202 T2 = T2OPType->getPointeeType();
3207 // FIXME: Block pointers, too?
3213 ASTContext::getNameForTemplate(TemplateName Name,
3214 SourceLocation NameLoc) const {
3215 switch (Name.getKind()) {
3216 case TemplateName::QualifiedTemplate:
3217 case TemplateName::Template:
3218 // DNInfo work in progress: CHECKME: what about DNLoc?
3219 return DeclarationNameInfo(Name.getAsTemplateDecl()->getDeclName(),
3222 case TemplateName::OverloadedTemplate: {
3223 OverloadedTemplateStorage *Storage = Name.getAsOverloadedTemplate();
3224 // DNInfo work in progress: CHECKME: what about DNLoc?
3225 return DeclarationNameInfo((*Storage->begin())->getDeclName(), NameLoc);
3228 case TemplateName::DependentTemplate: {
3229 DependentTemplateName *DTN = Name.getAsDependentTemplateName();
3230 DeclarationName DName;
3231 if (DTN->isIdentifier()) {
3232 DName = DeclarationNames.getIdentifier(DTN->getIdentifier());
3233 return DeclarationNameInfo(DName, NameLoc);
3235 DName = DeclarationNames.getCXXOperatorName(DTN->getOperator());
3236 // DNInfo work in progress: FIXME: source locations?
3237 DeclarationNameLoc DNLoc;
3238 DNLoc.CXXOperatorName.BeginOpNameLoc = SourceLocation().getRawEncoding();
3239 DNLoc.CXXOperatorName.EndOpNameLoc = SourceLocation().getRawEncoding();
3240 return DeclarationNameInfo(DName, NameLoc, DNLoc);
3244 case TemplateName::SubstTemplateTemplateParm: {
3245 SubstTemplateTemplateParmStorage *subst
3246 = Name.getAsSubstTemplateTemplateParm();
3247 return DeclarationNameInfo(subst->getParameter()->getDeclName(),
3251 case TemplateName::SubstTemplateTemplateParmPack: {
3252 SubstTemplateTemplateParmPackStorage *subst
3253 = Name.getAsSubstTemplateTemplateParmPack();
3254 return DeclarationNameInfo(subst->getParameterPack()->getDeclName(),
3259 llvm_unreachable("bad template name kind!");
3262 TemplateName ASTContext::getCanonicalTemplateName(TemplateName Name) const {
3263 switch (Name.getKind()) {
3264 case TemplateName::QualifiedTemplate:
3265 case TemplateName::Template: {
3266 TemplateDecl *Template = Name.getAsTemplateDecl();
3267 if (TemplateTemplateParmDecl *TTP
3268 = dyn_cast<TemplateTemplateParmDecl>(Template))
3269 Template = getCanonicalTemplateTemplateParmDecl(TTP);
3271 // The canonical template name is the canonical template declaration.
3272 return TemplateName(cast<TemplateDecl>(Template->getCanonicalDecl()));
3275 case TemplateName::OverloadedTemplate:
3276 llvm_unreachable("cannot canonicalize overloaded template");
3278 case TemplateName::DependentTemplate: {
3279 DependentTemplateName *DTN = Name.getAsDependentTemplateName();
3280 assert(DTN && "Non-dependent template names must refer to template decls.");
3281 return DTN->CanonicalTemplateName;
3284 case TemplateName::SubstTemplateTemplateParm: {
3285 SubstTemplateTemplateParmStorage *subst
3286 = Name.getAsSubstTemplateTemplateParm();
3287 return getCanonicalTemplateName(subst->getReplacement());
3290 case TemplateName::SubstTemplateTemplateParmPack: {
3291 SubstTemplateTemplateParmPackStorage *subst
3292 = Name.getAsSubstTemplateTemplateParmPack();
3293 TemplateTemplateParmDecl *canonParameter
3294 = getCanonicalTemplateTemplateParmDecl(subst->getParameterPack());
3295 TemplateArgument canonArgPack
3296 = getCanonicalTemplateArgument(subst->getArgumentPack());
3297 return getSubstTemplateTemplateParmPack(canonParameter, canonArgPack);
3301 llvm_unreachable("bad template name!");
3304 bool ASTContext::hasSameTemplateName(TemplateName X, TemplateName Y) {
3305 X = getCanonicalTemplateName(X);
3306 Y = getCanonicalTemplateName(Y);
3307 return X.getAsVoidPointer() == Y.getAsVoidPointer();
3311 ASTContext::getCanonicalTemplateArgument(const TemplateArgument &Arg) const {
3312 switch (Arg.getKind()) {
3313 case TemplateArgument::Null:
3316 case TemplateArgument::Expression:
3319 case TemplateArgument::Declaration: {
3320 if (Decl *D = Arg.getAsDecl())
3321 return TemplateArgument(D->getCanonicalDecl());
3322 return TemplateArgument((Decl*)0);
3325 case TemplateArgument::Template:
3326 return TemplateArgument(getCanonicalTemplateName(Arg.getAsTemplate()));
3328 case TemplateArgument::TemplateExpansion:
3329 return TemplateArgument(getCanonicalTemplateName(
3330 Arg.getAsTemplateOrTemplatePattern()),
3331 Arg.getNumTemplateExpansions());
3333 case TemplateArgument::Integral:
3334 return TemplateArgument(*Arg.getAsIntegral(),
3335 getCanonicalType(Arg.getIntegralType()));
3337 case TemplateArgument::Type:
3338 return TemplateArgument(getCanonicalType(Arg.getAsType()));
3340 case TemplateArgument::Pack: {
3341 if (Arg.pack_size() == 0)
3344 TemplateArgument *CanonArgs
3345 = new (*this) TemplateArgument[Arg.pack_size()];
3347 for (TemplateArgument::pack_iterator A = Arg.pack_begin(),
3348 AEnd = Arg.pack_end();
3349 A != AEnd; (void)++A, ++Idx)
3350 CanonArgs[Idx] = getCanonicalTemplateArgument(*A);
3352 return TemplateArgument(CanonArgs, Arg.pack_size());
3356 // Silence GCC warning
3357 llvm_unreachable("Unhandled template argument kind");
3360 NestedNameSpecifier *
3361 ASTContext::getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) const {
3365 switch (NNS->getKind()) {
3366 case NestedNameSpecifier::Identifier:
3367 // Canonicalize the prefix but keep the identifier the same.
3368 return NestedNameSpecifier::Create(*this,
3369 getCanonicalNestedNameSpecifier(NNS->getPrefix()),
3370 NNS->getAsIdentifier());
3372 case NestedNameSpecifier::Namespace:
3373 // A namespace is canonical; build a nested-name-specifier with
3374 // this namespace and no prefix.
3375 return NestedNameSpecifier::Create(*this, 0,
3376 NNS->getAsNamespace()->getOriginalNamespace());
3378 case NestedNameSpecifier::NamespaceAlias:
3379 // A namespace is canonical; build a nested-name-specifier with
3380 // this namespace and no prefix.
3381 return NestedNameSpecifier::Create(*this, 0,
3382 NNS->getAsNamespaceAlias()->getNamespace()
3383 ->getOriginalNamespace());
3385 case NestedNameSpecifier::TypeSpec:
3386 case NestedNameSpecifier::TypeSpecWithTemplate: {
3387 QualType T = getCanonicalType(QualType(NNS->getAsType(), 0));
3389 // If we have some kind of dependent-named type (e.g., "typename T::type"),
3390 // break it apart into its prefix and identifier, then reconsititute those
3391 // as the canonical nested-name-specifier. This is required to canonicalize
3392 // a dependent nested-name-specifier involving typedefs of dependent-name
3394 // typedef typename T::type T1;
3395 // typedef typename T1::type T2;
3396 if (const DependentNameType *DNT = T->getAs<DependentNameType>())
3397 return NestedNameSpecifier::Create(*this, DNT->getQualifier(),
3398 const_cast<IdentifierInfo *>(DNT->getIdentifier()));
3400 // Otherwise, just canonicalize the type, and force it to be a TypeSpec.
3401 // FIXME: Why are TypeSpec and TypeSpecWithTemplate distinct in the
3403 return NestedNameSpecifier::Create(*this, 0, false,
3404 const_cast<Type*>(T.getTypePtr()));
3407 case NestedNameSpecifier::Global:
3408 // The global specifier is canonical and unique.
3412 llvm_unreachable("Invalid NestedNameSpecifier::Kind!");
3416 const ArrayType *ASTContext::getAsArrayType(QualType T) const {
3417 // Handle the non-qualified case efficiently.
3418 if (!T.hasLocalQualifiers()) {
3419 // Handle the common positive case fast.
3420 if (const ArrayType *AT = dyn_cast<ArrayType>(T))
3424 // Handle the common negative case fast.
3425 if (!isa<ArrayType>(T.getCanonicalType()))
3428 // Apply any qualifiers from the array type to the element type. This
3429 // implements C99 6.7.3p8: "If the specification of an array type includes
3430 // any type qualifiers, the element type is so qualified, not the array type."
3432 // If we get here, we either have type qualifiers on the type, or we have
3433 // sugar such as a typedef in the way. If we have type qualifiers on the type
3434 // we must propagate them down into the element type.
3436 SplitQualType split = T.getSplitDesugaredType();
3437 Qualifiers qs = split.Quals;
3439 // If we have a simple case, just return now.
3440 const ArrayType *ATy = dyn_cast<ArrayType>(split.Ty);
3441 if (ATy == 0 || qs.empty())
3444 // Otherwise, we have an array and we have qualifiers on it. Push the
3445 // qualifiers into the array element type and return a new array type.
3446 QualType NewEltTy = getQualifiedType(ATy->getElementType(), qs);
3448 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy))
3449 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(),
3450 CAT->getSizeModifier(),
3451 CAT->getIndexTypeCVRQualifiers()));
3452 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy))
3453 return cast<ArrayType>(getIncompleteArrayType(NewEltTy,
3454 IAT->getSizeModifier(),
3455 IAT->getIndexTypeCVRQualifiers()));
3457 if (const DependentSizedArrayType *DSAT
3458 = dyn_cast<DependentSizedArrayType>(ATy))
3459 return cast<ArrayType>(
3460 getDependentSizedArrayType(NewEltTy,
3461 DSAT->getSizeExpr(),
3462 DSAT->getSizeModifier(),
3463 DSAT->getIndexTypeCVRQualifiers(),
3464 DSAT->getBracketsRange()));
3466 const VariableArrayType *VAT = cast<VariableArrayType>(ATy);
3467 return cast<ArrayType>(getVariableArrayType(NewEltTy,
3469 VAT->getSizeModifier(),
3470 VAT->getIndexTypeCVRQualifiers(),
3471 VAT->getBracketsRange()));
3474 QualType ASTContext::getAdjustedParameterType(QualType T) {
3476 // A declaration of a parameter as "array of type" shall be
3477 // adjusted to "qualified pointer to type", where the type
3478 // qualifiers (if any) are those specified within the [ and ] of
3479 // the array type derivation.
3480 if (T->isArrayType())
3481 return getArrayDecayedType(T);
3484 // A declaration of a parameter as "function returning type"
3485 // shall be adjusted to "pointer to function returning type", as
3487 if (T->isFunctionType())
3488 return getPointerType(T);
3493 QualType ASTContext::getSignatureParameterType(QualType T) {
3494 T = getVariableArrayDecayedType(T);
3495 T = getAdjustedParameterType(T);
3496 return T.getUnqualifiedType();
3499 /// getArrayDecayedType - Return the properly qualified result of decaying the
3500 /// specified array type to a pointer. This operation is non-trivial when
3501 /// handling typedefs etc. The canonical type of "T" must be an array type,
3502 /// this returns a pointer to a properly qualified element of the array.
3504 /// See C99 6.7.5.3p7 and C99 6.3.2.1p3.
3505 QualType ASTContext::getArrayDecayedType(QualType Ty) const {
3506 // Get the element type with 'getAsArrayType' so that we don't lose any
3507 // typedefs in the element type of the array. This also handles propagation
3508 // of type qualifiers from the array type into the element type if present
3510 const ArrayType *PrettyArrayType = getAsArrayType(Ty);
3511 assert(PrettyArrayType && "Not an array type!");
3513 QualType PtrTy = getPointerType(PrettyArrayType->getElementType());
3515 // int x[restrict 4] -> int *restrict
3516 return getQualifiedType(PtrTy, PrettyArrayType->getIndexTypeQualifiers());
3519 QualType ASTContext::getBaseElementType(const ArrayType *array) const {
3520 return getBaseElementType(array->getElementType());
3523 QualType ASTContext::getBaseElementType(QualType type) const {
3526 SplitQualType split = type.getSplitDesugaredType();
3527 const ArrayType *array = split.Ty->getAsArrayTypeUnsafe();
3530 type = array->getElementType();
3531 qs.addConsistentQualifiers(split.Quals);
3534 return getQualifiedType(type, qs);
3537 /// getConstantArrayElementCount - Returns number of constant array elements.
3539 ASTContext::getConstantArrayElementCount(const ConstantArrayType *CA) const {
3540 uint64_t ElementCount = 1;
3542 ElementCount *= CA->getSize().getZExtValue();
3543 CA = dyn_cast<ConstantArrayType>(CA->getElementType());
3545 return ElementCount;
3548 /// getFloatingRank - Return a relative rank for floating point types.
3549 /// This routine will assert if passed a built-in type that isn't a float.
3550 static FloatingRank getFloatingRank(QualType T) {
3551 if (const ComplexType *CT = T->getAs<ComplexType>())
3552 return getFloatingRank(CT->getElementType());
3554 assert(T->getAs<BuiltinType>() && "getFloatingRank(): not a floating type");
3555 switch (T->getAs<BuiltinType>()->getKind()) {
3556 default: llvm_unreachable("getFloatingRank(): not a floating type");
3557 case BuiltinType::Half: return HalfRank;
3558 case BuiltinType::Float: return FloatRank;
3559 case BuiltinType::Double: return DoubleRank;
3560 case BuiltinType::LongDouble: return LongDoubleRank;
3564 /// getFloatingTypeOfSizeWithinDomain - Returns a real floating
3565 /// point or a complex type (based on typeDomain/typeSize).
3566 /// 'typeDomain' is a real floating point or complex type.
3567 /// 'typeSize' is a real floating point or complex type.
3568 QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size,
3569 QualType Domain) const {
3570 FloatingRank EltRank = getFloatingRank(Size);
3571 if (Domain->isComplexType()) {
3573 case HalfRank: llvm_unreachable("Complex half is not supported");
3574 case FloatRank: return FloatComplexTy;
3575 case DoubleRank: return DoubleComplexTy;
3576 case LongDoubleRank: return LongDoubleComplexTy;
3580 assert(Domain->isRealFloatingType() && "Unknown domain!");
3582 case HalfRank: llvm_unreachable("Half ranks are not valid here");
3583 case FloatRank: return FloatTy;
3584 case DoubleRank: return DoubleTy;
3585 case LongDoubleRank: return LongDoubleTy;
3587 llvm_unreachable("getFloatingRank(): illegal value for rank");
3590 /// getFloatingTypeOrder - Compare the rank of the two specified floating
3591 /// point types, ignoring the domain of the type (i.e. 'double' ==
3592 /// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If
3593 /// LHS < RHS, return -1.
3594 int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) const {
3595 FloatingRank LHSR = getFloatingRank(LHS);
3596 FloatingRank RHSR = getFloatingRank(RHS);
3605 /// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This
3606 /// routine will assert if passed a built-in type that isn't an integer or enum,
3607 /// or if it is not canonicalized.
3608 unsigned ASTContext::getIntegerRank(const Type *T) const {
3609 assert(T->isCanonicalUnqualified() && "T should be canonicalized");
3611 switch (cast<BuiltinType>(T)->getKind()) {
3612 default: llvm_unreachable("getIntegerRank(): not a built-in integer");
3613 case BuiltinType::Bool:
3614 return 1 + (getIntWidth(BoolTy) << 3);
3615 case BuiltinType::Char_S:
3616 case BuiltinType::Char_U:
3617 case BuiltinType::SChar:
3618 case BuiltinType::UChar:
3619 return 2 + (getIntWidth(CharTy) << 3);
3620 case BuiltinType::Short:
3621 case BuiltinType::UShort:
3622 return 3 + (getIntWidth(ShortTy) << 3);
3623 case BuiltinType::Int:
3624 case BuiltinType::UInt:
3625 return 4 + (getIntWidth(IntTy) << 3);
3626 case BuiltinType::Long:
3627 case BuiltinType::ULong:
3628 return 5 + (getIntWidth(LongTy) << 3);
3629 case BuiltinType::LongLong:
3630 case BuiltinType::ULongLong:
3631 return 6 + (getIntWidth(LongLongTy) << 3);
3632 case BuiltinType::Int128:
3633 case BuiltinType::UInt128:
3634 return 7 + (getIntWidth(Int128Ty) << 3);
3638 /// \brief Whether this is a promotable bitfield reference according
3639 /// to C99 6.3.1.1p2, bullet 2 (and GCC extensions).
3641 /// \returns the type this bit-field will promote to, or NULL if no
3642 /// promotion occurs.
3643 QualType ASTContext::isPromotableBitField(Expr *E) const {
3644 if (E->isTypeDependent() || E->isValueDependent())
3647 FieldDecl *Field = E->getBitField();
3651 QualType FT = Field->getType();
3653 uint64_t BitWidth = Field->getBitWidthValue(*this);
3654 uint64_t IntSize = getTypeSize(IntTy);
3655 // GCC extension compatibility: if the bit-field size is less than or equal
3656 // to the size of int, it gets promoted no matter what its type is.
3657 // For instance, unsigned long bf : 4 gets promoted to signed int.
3658 if (BitWidth < IntSize)
3661 if (BitWidth == IntSize)
3662 return FT->isSignedIntegerType() ? IntTy : UnsignedIntTy;
3664 // Types bigger than int are not subject to promotions, and therefore act
3665 // like the base type.
3666 // FIXME: This doesn't quite match what gcc does, but what gcc does here
3671 /// getPromotedIntegerType - Returns the type that Promotable will
3672 /// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable
3674 QualType ASTContext::getPromotedIntegerType(QualType Promotable) const {
3675 assert(!Promotable.isNull());
3676 assert(Promotable->isPromotableIntegerType());
3677 if (const EnumType *ET = Promotable->getAs<EnumType>())
3678 return ET->getDecl()->getPromotionType();
3680 if (const BuiltinType *BT = Promotable->getAs<BuiltinType>()) {
3681 // C++ [conv.prom]: A prvalue of type char16_t, char32_t, or wchar_t
3682 // (3.9.1) can be converted to a prvalue of the first of the following
3683 // types that can represent all the values of its underlying type:
3684 // int, unsigned int, long int, unsigned long int, long long int, or
3685 // unsigned long long int [...]
3686 // FIXME: Is there some better way to compute this?
3687 if (BT->getKind() == BuiltinType::WChar_S ||
3688 BT->getKind() == BuiltinType::WChar_U ||
3689 BT->getKind() == BuiltinType::Char16 ||
3690 BT->getKind() == BuiltinType::Char32) {
3691 bool FromIsSigned = BT->getKind() == BuiltinType::WChar_S;
3692 uint64_t FromSize = getTypeSize(BT);
3693 QualType PromoteTypes[] = { IntTy, UnsignedIntTy, LongTy, UnsignedLongTy,
3694 LongLongTy, UnsignedLongLongTy };
3695 for (size_t Idx = 0; Idx < llvm::array_lengthof(PromoteTypes); ++Idx) {
3696 uint64_t ToSize = getTypeSize(PromoteTypes[Idx]);
3697 if (FromSize < ToSize ||
3698 (FromSize == ToSize &&
3699 FromIsSigned == PromoteTypes[Idx]->isSignedIntegerType()))
3700 return PromoteTypes[Idx];
3702 llvm_unreachable("char type should fit into long long");
3706 // At this point, we should have a signed or unsigned integer type.
3707 if (Promotable->isSignedIntegerType())
3709 uint64_t PromotableSize = getTypeSize(Promotable);
3710 uint64_t IntSize = getTypeSize(IntTy);
3711 assert(Promotable->isUnsignedIntegerType() && PromotableSize <= IntSize);
3712 return (PromotableSize != IntSize) ? IntTy : UnsignedIntTy;
3715 /// \brief Recurses in pointer/array types until it finds an objc retainable
3716 /// type and returns its ownership.
3717 Qualifiers::ObjCLifetime ASTContext::getInnerObjCOwnership(QualType T) const {
3718 while (!T.isNull()) {
3719 if (T.getObjCLifetime() != Qualifiers::OCL_None)
3720 return T.getObjCLifetime();
3721 if (T->isArrayType())
3722 T = getBaseElementType(T);
3723 else if (const PointerType *PT = T->getAs<PointerType>())
3724 T = PT->getPointeeType();
3725 else if (const ReferenceType *RT = T->getAs<ReferenceType>())
3726 T = RT->getPointeeType();
3731 return Qualifiers::OCL_None;
3734 /// getIntegerTypeOrder - Returns the highest ranked integer type:
3735 /// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If
3736 /// LHS < RHS, return -1.
3737 int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) const {
3738 const Type *LHSC = getCanonicalType(LHS).getTypePtr();
3739 const Type *RHSC = getCanonicalType(RHS).getTypePtr();
3740 if (LHSC == RHSC) return 0;
3742 bool LHSUnsigned = LHSC->isUnsignedIntegerType();
3743 bool RHSUnsigned = RHSC->isUnsignedIntegerType();
3745 unsigned LHSRank = getIntegerRank(LHSC);
3746 unsigned RHSRank = getIntegerRank(RHSC);
3748 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned.
3749 if (LHSRank == RHSRank) return 0;
3750 return LHSRank > RHSRank ? 1 : -1;
3753 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa.
3755 // If the unsigned [LHS] type is larger, return it.
3756 if (LHSRank >= RHSRank)
3759 // If the signed type can represent all values of the unsigned type, it
3760 // wins. Because we are dealing with 2's complement and types that are
3761 // powers of two larger than each other, this is always safe.
3765 // If the unsigned [RHS] type is larger, return it.
3766 if (RHSRank >= LHSRank)
3769 // If the signed type can represent all values of the unsigned type, it
3770 // wins. Because we are dealing with 2's complement and types that are
3771 // powers of two larger than each other, this is always safe.
3776 CreateRecordDecl(const ASTContext &Ctx, RecordDecl::TagKind TK,
3777 DeclContext *DC, IdentifierInfo *Id) {
3779 if (Ctx.getLangOpts().CPlusPlus)
3780 return CXXRecordDecl::Create(Ctx, TK, DC, Loc, Loc, Id);
3782 return RecordDecl::Create(Ctx, TK, DC, Loc, Loc, Id);
3785 // getCFConstantStringType - Return the type used for constant CFStrings.
3786 QualType ASTContext::getCFConstantStringType() const {
3787 if (!CFConstantStringTypeDecl) {
3788 CFConstantStringTypeDecl =
3789 CreateRecordDecl(*this, TTK_Struct, TUDecl,
3790 &Idents.get("NSConstantString"));
3791 CFConstantStringTypeDecl->startDefinition();
3793 QualType FieldTypes[4];
3796 FieldTypes[0] = getPointerType(IntTy.withConst());
3798 FieldTypes[1] = IntTy;
3800 FieldTypes[2] = getPointerType(CharTy.withConst());
3802 FieldTypes[3] = LongTy;
3805 for (unsigned i = 0; i < 4; ++i) {
3806 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl,
3808 SourceLocation(), 0,
3809 FieldTypes[i], /*TInfo=*/0,
3813 Field->setAccess(AS_public);
3814 CFConstantStringTypeDecl->addDecl(Field);
3817 CFConstantStringTypeDecl->completeDefinition();
3820 return getTagDeclType(CFConstantStringTypeDecl);
3823 void ASTContext::setCFConstantStringType(QualType T) {
3824 const RecordType *Rec = T->getAs<RecordType>();
3825 assert(Rec && "Invalid CFConstantStringType");
3826 CFConstantStringTypeDecl = Rec->getDecl();
3829 QualType ASTContext::getBlockDescriptorType() const {
3830 if (BlockDescriptorType)
3831 return getTagDeclType(BlockDescriptorType);
3834 // FIXME: Needs the FlagAppleBlock bit.
3835 T = CreateRecordDecl(*this, TTK_Struct, TUDecl,
3836 &Idents.get("__block_descriptor"));
3837 T->startDefinition();
3839 QualType FieldTypes[] = {
3844 const char *FieldNames[] = {
3849 for (size_t i = 0; i < 2; ++i) {
3850 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(),
3852 &Idents.get(FieldNames[i]),
3853 FieldTypes[i], /*TInfo=*/0,
3857 Field->setAccess(AS_public);
3861 T->completeDefinition();
3863 BlockDescriptorType = T;
3865 return getTagDeclType(BlockDescriptorType);
3868 QualType ASTContext::getBlockDescriptorExtendedType() const {
3869 if (BlockDescriptorExtendedType)
3870 return getTagDeclType(BlockDescriptorExtendedType);
3873 // FIXME: Needs the FlagAppleBlock bit.
3874 T = CreateRecordDecl(*this, TTK_Struct, TUDecl,
3875 &Idents.get("__block_descriptor_withcopydispose"));
3876 T->startDefinition();
3878 QualType FieldTypes[] = {
3881 getPointerType(VoidPtrTy),
3882 getPointerType(VoidPtrTy)
3885 const char *FieldNames[] = {
3892 for (size_t i = 0; i < 4; ++i) {
3893 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(),
3895 &Idents.get(FieldNames[i]),
3896 FieldTypes[i], /*TInfo=*/0,
3900 Field->setAccess(AS_public);
3904 T->completeDefinition();
3906 BlockDescriptorExtendedType = T;
3908 return getTagDeclType(BlockDescriptorExtendedType);
3911 bool ASTContext::BlockRequiresCopying(QualType Ty) const {
3912 if (Ty->isObjCRetainableType())
3914 if (getLangOpts().CPlusPlus) {
3915 if (const RecordType *RT = Ty->getAs<RecordType>()) {
3916 CXXRecordDecl *RD = cast<CXXRecordDecl>(RT->getDecl());
3917 return RD->hasConstCopyConstructor();
3925 ASTContext::BuildByRefType(StringRef DeclName, QualType Ty) const {
3926 // type = struct __Block_byref_1_X {
3928 // struct __Block_byref_1_X *__forwarding;
3929 // unsigned int __flags;
3930 // unsigned int __size;
3931 // void *__copy_helper; // as needed
3932 // void *__destroy_help // as needed
3936 bool HasCopyAndDispose = BlockRequiresCopying(Ty);
3939 SmallString<36> Name;
3940 llvm::raw_svector_ostream(Name) << "__Block_byref_" <<
3941 ++UniqueBlockByRefTypeID << '_' << DeclName;
3943 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, &Idents.get(Name.str()));
3944 T->startDefinition();
3945 QualType Int32Ty = IntTy;
3946 assert(getIntWidth(IntTy) == 32 && "non-32bit int not supported");
3947 QualType FieldTypes[] = {
3948 getPointerType(VoidPtrTy),
3949 getPointerType(getTagDeclType(T)),
3952 getPointerType(VoidPtrTy),
3953 getPointerType(VoidPtrTy),
3957 StringRef FieldNames[] = {
3967 for (size_t i = 0; i < 7; ++i) {
3968 if (!HasCopyAndDispose && i >=4 && i <= 5)
3970 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(),
3972 &Idents.get(FieldNames[i]),
3973 FieldTypes[i], /*TInfo=*/0,
3974 /*BitWidth=*/0, /*Mutable=*/false,
3976 Field->setAccess(AS_public);
3980 T->completeDefinition();
3982 return getPointerType(getTagDeclType(T));
3985 TypedefDecl *ASTContext::getObjCInstanceTypeDecl() {
3986 if (!ObjCInstanceTypeDecl)
3987 ObjCInstanceTypeDecl = TypedefDecl::Create(*this,
3988 getTranslationUnitDecl(),
3991 &Idents.get("instancetype"),
3992 getTrivialTypeSourceInfo(getObjCIdType()));
3993 return ObjCInstanceTypeDecl;
3996 // This returns true if a type has been typedefed to BOOL:
3997 // typedef <type> BOOL;
3998 static bool isTypeTypedefedAsBOOL(QualType T) {
3999 if (const TypedefType *TT = dyn_cast<TypedefType>(T))
4000 if (IdentifierInfo *II = TT->getDecl()->getIdentifier())
4001 return II->isStr("BOOL");
4006 /// getObjCEncodingTypeSize returns size of type for objective-c encoding
4008 CharUnits ASTContext::getObjCEncodingTypeSize(QualType type) const {
4009 if (!type->isIncompleteArrayType() && type->isIncompleteType())
4010 return CharUnits::Zero();
4012 CharUnits sz = getTypeSizeInChars(type);
4014 // Make all integer and enum types at least as large as an int
4015 if (sz.isPositive() && type->isIntegralOrEnumerationType())
4016 sz = std::max(sz, getTypeSizeInChars(IntTy));
4017 // Treat arrays as pointers, since that's how they're passed in.
4018 else if (type->isArrayType())
4019 sz = getTypeSizeInChars(VoidPtrTy);
4024 std::string charUnitsToString(const CharUnits &CU) {
4025 return llvm::itostr(CU.getQuantity());
4028 /// getObjCEncodingForBlock - Return the encoded type for this block
4030 std::string ASTContext::getObjCEncodingForBlock(const BlockExpr *Expr) const {
4033 const BlockDecl *Decl = Expr->getBlockDecl();
4035 Expr->getType()->getAs<BlockPointerType>()->getPointeeType();
4036 // Encode result type.
4037 getObjCEncodingForType(BlockTy->getAs<FunctionType>()->getResultType(), S);
4038 // Compute size of all parameters.
4039 // Start with computing size of a pointer in number of bytes.
4040 // FIXME: There might(should) be a better way of doing this computation!
4042 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy);
4043 CharUnits ParmOffset = PtrSize;
4044 for (BlockDecl::param_const_iterator PI = Decl->param_begin(),
4045 E = Decl->param_end(); PI != E; ++PI) {
4046 QualType PType = (*PI)->getType();
4047 CharUnits sz = getObjCEncodingTypeSize(PType);
4048 assert (sz.isPositive() && "BlockExpr - Incomplete param type");
4051 // Size of the argument frame
4052 S += charUnitsToString(ParmOffset);
4053 // Block pointer and offset.
4057 ParmOffset = PtrSize;
4058 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), E =
4059 Decl->param_end(); PI != E; ++PI) {
4060 ParmVarDecl *PVDecl = *PI;
4061 QualType PType = PVDecl->getOriginalType();
4062 if (const ArrayType *AT =
4063 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) {
4064 // Use array's original type only if it has known number of
4066 if (!isa<ConstantArrayType>(AT))
4067 PType = PVDecl->getType();
4068 } else if (PType->isFunctionType())
4069 PType = PVDecl->getType();
4070 getObjCEncodingForType(PType, S);
4071 S += charUnitsToString(ParmOffset);
4072 ParmOffset += getObjCEncodingTypeSize(PType);
4078 bool ASTContext::getObjCEncodingForFunctionDecl(const FunctionDecl *Decl,
4080 // Encode result type.
4081 getObjCEncodingForType(Decl->getResultType(), S);
4082 CharUnits ParmOffset;
4083 // Compute size of all parameters.
4084 for (FunctionDecl::param_const_iterator PI = Decl->param_begin(),
4085 E = Decl->param_end(); PI != E; ++PI) {
4086 QualType PType = (*PI)->getType();
4087 CharUnits sz = getObjCEncodingTypeSize(PType);
4091 assert (sz.isPositive() &&
4092 "getObjCEncodingForFunctionDecl - Incomplete param type");
4095 S += charUnitsToString(ParmOffset);
4096 ParmOffset = CharUnits::Zero();
4099 for (FunctionDecl::param_const_iterator PI = Decl->param_begin(),
4100 E = Decl->param_end(); PI != E; ++PI) {
4101 ParmVarDecl *PVDecl = *PI;
4102 QualType PType = PVDecl->getOriginalType();
4103 if (const ArrayType *AT =
4104 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) {
4105 // Use array's original type only if it has known number of
4107 if (!isa<ConstantArrayType>(AT))
4108 PType = PVDecl->getType();
4109 } else if (PType->isFunctionType())
4110 PType = PVDecl->getType();
4111 getObjCEncodingForType(PType, S);
4112 S += charUnitsToString(ParmOffset);
4113 ParmOffset += getObjCEncodingTypeSize(PType);
4119 /// getObjCEncodingForMethodParameter - Return the encoded type for a single
4120 /// method parameter or return type. If Extended, include class names and
4121 /// block object types.
4122 void ASTContext::getObjCEncodingForMethodParameter(Decl::ObjCDeclQualifier QT,
4123 QualType T, std::string& S,
4124 bool Extended) const {
4125 // Encode type qualifer, 'in', 'inout', etc. for the parameter.
4126 getObjCEncodingForTypeQualifier(QT, S);
4127 // Encode parameter type.
4128 getObjCEncodingForTypeImpl(T, S, true, true, 0,
4129 true /*OutermostType*/,
4130 false /*EncodingProperty*/,
4131 false /*StructField*/,
4132 Extended /*EncodeBlockParameters*/,
4133 Extended /*EncodeClassNames*/);
4136 /// getObjCEncodingForMethodDecl - Return the encoded type for this method
4138 bool ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl,
4140 bool Extended) const {
4141 // FIXME: This is not very efficient.
4142 // Encode return type.
4143 getObjCEncodingForMethodParameter(Decl->getObjCDeclQualifier(),
4144 Decl->getResultType(), S, Extended);
4145 // Compute size of all parameters.
4146 // Start with computing size of a pointer in number of bytes.
4147 // FIXME: There might(should) be a better way of doing this computation!
4149 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy);
4150 // The first two arguments (self and _cmd) are pointers; account for
4152 CharUnits ParmOffset = 2 * PtrSize;
4153 for (ObjCMethodDecl::param_const_iterator PI = Decl->param_begin(),
4154 E = Decl->sel_param_end(); PI != E; ++PI) {
4155 QualType PType = (*PI)->getType();
4156 CharUnits sz = getObjCEncodingTypeSize(PType);
4160 assert (sz.isPositive() &&
4161 "getObjCEncodingForMethodDecl - Incomplete param type");
4164 S += charUnitsToString(ParmOffset);
4166 S += charUnitsToString(PtrSize);
4169 ParmOffset = 2 * PtrSize;
4170 for (ObjCMethodDecl::param_const_iterator PI = Decl->param_begin(),
4171 E = Decl->sel_param_end(); PI != E; ++PI) {
4172 const ParmVarDecl *PVDecl = *PI;
4173 QualType PType = PVDecl->getOriginalType();
4174 if (const ArrayType *AT =
4175 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) {
4176 // Use array's original type only if it has known number of
4178 if (!isa<ConstantArrayType>(AT))
4179 PType = PVDecl->getType();
4180 } else if (PType->isFunctionType())
4181 PType = PVDecl->getType();
4182 getObjCEncodingForMethodParameter(PVDecl->getObjCDeclQualifier(),
4183 PType, S, Extended);
4184 S += charUnitsToString(ParmOffset);
4185 ParmOffset += getObjCEncodingTypeSize(PType);
4191 /// getObjCEncodingForPropertyDecl - Return the encoded type for this
4192 /// property declaration. If non-NULL, Container must be either an
4193 /// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be
4194 /// NULL when getting encodings for protocol properties.
4195 /// Property attributes are stored as a comma-delimited C string. The simple
4196 /// attributes readonly and bycopy are encoded as single characters. The
4197 /// parametrized attributes, getter=name, setter=name, and ivar=name, are
4198 /// encoded as single characters, followed by an identifier. Property types
4199 /// are also encoded as a parametrized attribute. The characters used to encode
4200 /// these attributes are defined by the following enumeration:
4202 /// enum PropertyAttributes {
4203 /// kPropertyReadOnly = 'R', // property is read-only.
4204 /// kPropertyBycopy = 'C', // property is a copy of the value last assigned
4205 /// kPropertyByref = '&', // property is a reference to the value last assigned
4206 /// kPropertyDynamic = 'D', // property is dynamic
4207 /// kPropertyGetter = 'G', // followed by getter selector name
4208 /// kPropertySetter = 'S', // followed by setter selector name
4209 /// kPropertyInstanceVariable = 'V' // followed by instance variable name
4210 /// kPropertyType = 'T' // followed by old-style type encoding.
4211 /// kPropertyWeak = 'W' // 'weak' property
4212 /// kPropertyStrong = 'P' // property GC'able
4213 /// kPropertyNonAtomic = 'N' // property non-atomic
4216 void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD,
4217 const Decl *Container,
4218 std::string& S) const {
4219 // Collect information from the property implementation decl(s).
4220 bool Dynamic = false;
4221 ObjCPropertyImplDecl *SynthesizePID = 0;
4223 // FIXME: Duplicated code due to poor abstraction.
4225 if (const ObjCCategoryImplDecl *CID =
4226 dyn_cast<ObjCCategoryImplDecl>(Container)) {
4227 for (ObjCCategoryImplDecl::propimpl_iterator
4228 i = CID->propimpl_begin(), e = CID->propimpl_end();
4230 ObjCPropertyImplDecl *PID = *i;
4231 if (PID->getPropertyDecl() == PD) {
4232 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) {
4235 SynthesizePID = PID;
4240 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container);
4241 for (ObjCCategoryImplDecl::propimpl_iterator
4242 i = OID->propimpl_begin(), e = OID->propimpl_end();
4244 ObjCPropertyImplDecl *PID = *i;
4245 if (PID->getPropertyDecl() == PD) {
4246 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) {
4249 SynthesizePID = PID;
4256 // FIXME: This is not very efficient.
4259 // Encode result type.
4260 // GCC has some special rules regarding encoding of properties which
4261 // closely resembles encoding of ivars.
4262 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, 0,
4263 true /* outermost type */,
4264 true /* encoding for property */);
4266 if (PD->isReadOnly()) {
4269 switch (PD->getSetterKind()) {
4270 case ObjCPropertyDecl::Assign: break;
4271 case ObjCPropertyDecl::Copy: S += ",C"; break;
4272 case ObjCPropertyDecl::Retain: S += ",&"; break;
4273 case ObjCPropertyDecl::Weak: S += ",W"; break;
4277 // It really isn't clear at all what this means, since properties
4278 // are "dynamic by default".
4282 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic)
4285 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) {
4287 S += PD->getGetterName().getAsString();
4290 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) {
4292 S += PD->getSetterName().getAsString();
4295 if (SynthesizePID) {
4296 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl();
4298 S += OID->getNameAsString();
4301 // FIXME: OBJCGC: weak & strong
4304 /// getLegacyIntegralTypeEncoding -
4305 /// Another legacy compatibility encoding: 32-bit longs are encoded as
4306 /// 'l' or 'L' , but not always. For typedefs, we need to use
4307 /// 'i' or 'I' instead if encoding a struct field, or a pointer!
4309 void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const {
4310 if (isa<TypedefType>(PointeeTy.getTypePtr())) {
4311 if (const BuiltinType *BT = PointeeTy->getAs<BuiltinType>()) {
4312 if (BT->getKind() == BuiltinType::ULong && getIntWidth(PointeeTy) == 32)
4313 PointeeTy = UnsignedIntTy;
4315 if (BT->getKind() == BuiltinType::Long && getIntWidth(PointeeTy) == 32)
4321 void ASTContext::getObjCEncodingForType(QualType T, std::string& S,
4322 const FieldDecl *Field) const {
4323 // We follow the behavior of gcc, expanding structures which are
4324 // directly pointed to, and expanding embedded structures. Note that
4325 // these rules are sufficient to prevent recursive encoding of the
4327 getObjCEncodingForTypeImpl(T, S, true, true, Field,
4328 true /* outermost type */);
4331 static char ObjCEncodingForPrimitiveKind(const ASTContext *C, QualType T) {
4332 switch (T->getAs<BuiltinType>()->getKind()) {
4333 default: llvm_unreachable("Unhandled builtin type kind");
4334 case BuiltinType::Void: return 'v';
4335 case BuiltinType::Bool: return 'B';
4336 case BuiltinType::Char_U:
4337 case BuiltinType::UChar: return 'C';
4338 case BuiltinType::UShort: return 'S';
4339 case BuiltinType::UInt: return 'I';
4340 case BuiltinType::ULong:
4341 return C->getIntWidth(T) == 32 ? 'L' : 'Q';
4342 case BuiltinType::UInt128: return 'T';
4343 case BuiltinType::ULongLong: return 'Q';
4344 case BuiltinType::Char_S:
4345 case BuiltinType::SChar: return 'c';
4346 case BuiltinType::Short: return 's';
4347 case BuiltinType::WChar_S:
4348 case BuiltinType::WChar_U:
4349 case BuiltinType::Int: return 'i';
4350 case BuiltinType::Long:
4351 return C->getIntWidth(T) == 32 ? 'l' : 'q';
4352 case BuiltinType::LongLong: return 'q';
4353 case BuiltinType::Int128: return 't';
4354 case BuiltinType::Float: return 'f';
4355 case BuiltinType::Double: return 'd';
4356 case BuiltinType::LongDouble: return 'D';
4360 static char ObjCEncodingForEnumType(const ASTContext *C, const EnumType *ET) {
4361 EnumDecl *Enum = ET->getDecl();
4363 // The encoding of an non-fixed enum type is always 'i', regardless of size.
4364 if (!Enum->isFixed())
4367 // The encoding of a fixed enum type matches its fixed underlying type.
4368 return ObjCEncodingForPrimitiveKind(C, Enum->getIntegerType());
4371 static void EncodeBitField(const ASTContext *Ctx, std::string& S,
4372 QualType T, const FieldDecl *FD) {
4373 assert(FD->isBitField() && "not a bitfield - getObjCEncodingForTypeImpl");
4375 // The NeXT runtime encodes bit fields as b followed by the number of bits.
4376 // The GNU runtime requires more information; bitfields are encoded as b,
4377 // then the offset (in bits) of the first element, then the type of the
4378 // bitfield, then the size in bits. For example, in this structure:
4385 // On a 32-bit system, the encoding for flags would be b2 for the NeXT
4386 // runtime, but b32i2 for the GNU runtime. The reason for this extra
4387 // information is not especially sensible, but we're stuck with it for
4388 // compatibility with GCC, although providing it breaks anything that
4389 // actually uses runtime introspection and wants to work on both runtimes...
4390 if (!Ctx->getLangOpts().NeXTRuntime) {
4391 const RecordDecl *RD = FD->getParent();
4392 const ASTRecordLayout &RL = Ctx->getASTRecordLayout(RD);
4393 S += llvm::utostr(RL.getFieldOffset(FD->getFieldIndex()));
4394 if (const EnumType *ET = T->getAs<EnumType>())
4395 S += ObjCEncodingForEnumType(Ctx, ET);
4397 S += ObjCEncodingForPrimitiveKind(Ctx, T);
4399 S += llvm::utostr(FD->getBitWidthValue(*Ctx));
4402 // FIXME: Use SmallString for accumulating string.
4403 void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S,
4404 bool ExpandPointedToStructures,
4405 bool ExpandStructures,
4406 const FieldDecl *FD,
4408 bool EncodingProperty,
4410 bool EncodeBlockParameters,
4411 bool EncodeClassNames) const {
4412 if (T->getAs<BuiltinType>()) {
4413 if (FD && FD->isBitField())
4414 return EncodeBitField(this, S, T, FD);
4415 S += ObjCEncodingForPrimitiveKind(this, T);
4419 if (const ComplexType *CT = T->getAs<ComplexType>()) {
4421 getObjCEncodingForTypeImpl(CT->getElementType(), S, false, false, 0, false,
4426 // encoding for pointer or r3eference types.
4428 if (const PointerType *PT = T->getAs<PointerType>()) {
4429 if (PT->isObjCSelType()) {
4433 PointeeTy = PT->getPointeeType();
4435 else if (const ReferenceType *RT = T->getAs<ReferenceType>())
4436 PointeeTy = RT->getPointeeType();
4437 if (!PointeeTy.isNull()) {
4438 bool isReadOnly = false;
4439 // For historical/compatibility reasons, the read-only qualifier of the
4440 // pointee gets emitted _before_ the '^'. The read-only qualifier of
4441 // the pointer itself gets ignored, _unless_ we are looking at a typedef!
4442 // Also, do not emit the 'r' for anything but the outermost type!
4443 if (isa<TypedefType>(T.getTypePtr())) {
4444 if (OutermostType && T.isConstQualified()) {
4448 } else if (OutermostType) {
4449 QualType P = PointeeTy;
4450 while (P->getAs<PointerType>())
4451 P = P->getAs<PointerType>()->getPointeeType();
4452 if (P.isConstQualified()) {
4458 // Another legacy compatibility encoding. Some ObjC qualifier and type
4459 // combinations need to be rearranged.
4460 // Rewrite "in const" from "nr" to "rn"
4461 if (StringRef(S).endswith("nr"))
4462 S.replace(S.end()-2, S.end(), "rn");
4465 if (PointeeTy->isCharType()) {
4466 // char pointer types should be encoded as '*' unless it is a
4467 // type that has been typedef'd to 'BOOL'.
4468 if (!isTypeTypedefedAsBOOL(PointeeTy)) {
4472 } else if (const RecordType *RTy = PointeeTy->getAs<RecordType>()) {
4473 // GCC binary compat: Need to convert "struct objc_class *" to "#".
4474 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_class")) {
4478 // GCC binary compat: Need to convert "struct objc_object *" to "@".
4479 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_object")) {
4486 getLegacyIntegralTypeEncoding(PointeeTy);
4488 getObjCEncodingForTypeImpl(PointeeTy, S, false, ExpandPointedToStructures,
4493 if (const ArrayType *AT =
4494 // Ignore type qualifiers etc.
4495 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) {
4496 if (isa<IncompleteArrayType>(AT) && !StructField) {
4497 // Incomplete arrays are encoded as a pointer to the array element.
4500 getObjCEncodingForTypeImpl(AT->getElementType(), S,
4501 false, ExpandStructures, FD);
4505 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) {
4506 if (getTypeSize(CAT->getElementType()) == 0)
4509 S += llvm::utostr(CAT->getSize().getZExtValue());
4511 //Variable length arrays are encoded as a regular array with 0 elements.
4512 assert((isa<VariableArrayType>(AT) || isa<IncompleteArrayType>(AT)) &&
4513 "Unknown array type!");
4517 getObjCEncodingForTypeImpl(AT->getElementType(), S,
4518 false, ExpandStructures, FD);
4524 if (T->getAs<FunctionType>()) {
4529 if (const RecordType *RTy = T->getAs<RecordType>()) {
4530 RecordDecl *RDecl = RTy->getDecl();
4531 S += RDecl->isUnion() ? '(' : '{';
4532 // Anonymous structures print as '?'
4533 if (const IdentifierInfo *II = RDecl->getIdentifier()) {
4535 if (ClassTemplateSpecializationDecl *Spec
4536 = dyn_cast<ClassTemplateSpecializationDecl>(RDecl)) {
4537 const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs();
4538 std::string TemplateArgsStr
4539 = TemplateSpecializationType::PrintTemplateArgumentList(
4540 TemplateArgs.data(),
4541 TemplateArgs.size(),
4542 (*this).getPrintingPolicy());
4544 S += TemplateArgsStr;
4549 if (ExpandStructures) {
4551 if (!RDecl->isUnion()) {
4552 getObjCEncodingForStructureImpl(RDecl, S, FD);
4554 for (RecordDecl::field_iterator Field = RDecl->field_begin(),
4555 FieldEnd = RDecl->field_end();
4556 Field != FieldEnd; ++Field) {
4559 S += Field->getNameAsString();
4563 // Special case bit-fields.
4564 if (Field->isBitField()) {
4565 getObjCEncodingForTypeImpl(Field->getType(), S, false, true,
4568 QualType qt = Field->getType();
4569 getLegacyIntegralTypeEncoding(qt);
4570 getObjCEncodingForTypeImpl(qt, S, false, true,
4571 FD, /*OutermostType*/false,
4572 /*EncodingProperty*/false,
4573 /*StructField*/true);
4578 S += RDecl->isUnion() ? ')' : '}';
4582 if (const EnumType *ET = T->getAs<EnumType>()) {
4583 if (FD && FD->isBitField())
4584 EncodeBitField(this, S, T, FD);
4586 S += ObjCEncodingForEnumType(this, ET);
4590 if (const BlockPointerType *BT = T->getAs<BlockPointerType>()) {
4591 S += "@?"; // Unlike a pointer-to-function, which is "^?".
4592 if (EncodeBlockParameters) {
4593 const FunctionType *FT = BT->getPointeeType()->getAs<FunctionType>();
4596 // Block return type
4597 getObjCEncodingForTypeImpl(FT->getResultType(), S,
4598 ExpandPointedToStructures, ExpandStructures,
4600 false /* OutermostType */,
4602 false /* StructField */,
4603 EncodeBlockParameters,
4608 if (const FunctionProtoType *FPT = dyn_cast<FunctionProtoType>(FT)) {
4609 for (FunctionProtoType::arg_type_iterator I = FPT->arg_type_begin(),
4610 E = FPT->arg_type_end(); I && (I != E); ++I) {
4611 getObjCEncodingForTypeImpl(*I, S,
4612 ExpandPointedToStructures,
4615 false /* OutermostType */,
4617 false /* StructField */,
4618 EncodeBlockParameters,
4627 // Ignore protocol qualifiers when mangling at this level.
4628 if (const ObjCObjectType *OT = T->getAs<ObjCObjectType>())
4629 T = OT->getBaseType();
4631 if (const ObjCInterfaceType *OIT = T->getAs<ObjCInterfaceType>()) {
4632 // @encode(class_name)
4633 ObjCInterfaceDecl *OI = OIT->getDecl();
4635 const IdentifierInfo *II = OI->getIdentifier();
4638 SmallVector<const ObjCIvarDecl*, 32> Ivars;
4639 DeepCollectObjCIvars(OI, true, Ivars);
4640 for (unsigned i = 0, e = Ivars.size(); i != e; ++i) {
4641 const FieldDecl *Field = cast<FieldDecl>(Ivars[i]);
4642 if (Field->isBitField())
4643 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, Field);
4645 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, FD);
4651 if (const ObjCObjectPointerType *OPT = T->getAs<ObjCObjectPointerType>()) {
4652 if (OPT->isObjCIdType()) {
4657 if (OPT->isObjCClassType() || OPT->isObjCQualifiedClassType()) {
4658 // FIXME: Consider if we need to output qualifiers for 'Class<p>'.
4659 // Since this is a binary compatibility issue, need to consult with runtime
4660 // folks. Fortunately, this is a *very* obsure construct.
4665 if (OPT->isObjCQualifiedIdType()) {
4666 getObjCEncodingForTypeImpl(getObjCIdType(), S,
4667 ExpandPointedToStructures,
4668 ExpandStructures, FD);
4669 if (FD || EncodingProperty || EncodeClassNames) {
4670 // Note that we do extended encoding of protocol qualifer list
4671 // Only when doing ivar or property encoding.
4673 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(),
4674 E = OPT->qual_end(); I != E; ++I) {
4676 S += (*I)->getNameAsString();
4684 QualType PointeeTy = OPT->getPointeeType();
4685 if (!EncodingProperty &&
4686 isa<TypedefType>(PointeeTy.getTypePtr())) {
4687 // Another historical/compatibility reason.
4688 // We encode the underlying type which comes out as
4691 getObjCEncodingForTypeImpl(PointeeTy, S,
4692 false, ExpandPointedToStructures,
4698 if (OPT->getInterfaceDecl() &&
4699 (FD || EncodingProperty || EncodeClassNames)) {
4701 S += OPT->getInterfaceDecl()->getIdentifier()->getName();
4702 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(),
4703 E = OPT->qual_end(); I != E; ++I) {
4705 S += (*I)->getNameAsString();
4713 // gcc just blithely ignores member pointers.
4714 // TODO: maybe there should be a mangling for these
4715 if (T->getAs<MemberPointerType>())
4718 if (T->isVectorType()) {
4719 // This matches gcc's encoding, even though technically it is
4721 // FIXME. We should do a better job than gcc.
4725 llvm_unreachable("@encode for type not implemented!");
4728 void ASTContext::getObjCEncodingForStructureImpl(RecordDecl *RDecl,
4730 const FieldDecl *FD,
4731 bool includeVBases) const {
4732 assert(RDecl && "Expected non-null RecordDecl");
4733 assert(!RDecl->isUnion() && "Should not be called for unions");
4734 if (!RDecl->getDefinition())
4737 CXXRecordDecl *CXXRec = dyn_cast<CXXRecordDecl>(RDecl);
4738 std::multimap<uint64_t, NamedDecl *> FieldOrBaseOffsets;
4739 const ASTRecordLayout &layout = getASTRecordLayout(RDecl);
4742 for (CXXRecordDecl::base_class_iterator
4743 BI = CXXRec->bases_begin(),
4744 BE = CXXRec->bases_end(); BI != BE; ++BI) {
4745 if (!BI->isVirtual()) {
4746 CXXRecordDecl *base = BI->getType()->getAsCXXRecordDecl();
4747 if (base->isEmpty())
4749 uint64_t offs = layout.getBaseClassOffsetInBits(base);
4750 FieldOrBaseOffsets.insert(FieldOrBaseOffsets.upper_bound(offs),
4751 std::make_pair(offs, base));
4757 for (RecordDecl::field_iterator Field = RDecl->field_begin(),
4758 FieldEnd = RDecl->field_end();
4759 Field != FieldEnd; ++Field, ++i) {
4760 uint64_t offs = layout.getFieldOffset(i);
4761 FieldOrBaseOffsets.insert(FieldOrBaseOffsets.upper_bound(offs),
4762 std::make_pair(offs, *Field));
4765 if (CXXRec && includeVBases) {
4766 for (CXXRecordDecl::base_class_iterator
4767 BI = CXXRec->vbases_begin(),
4768 BE = CXXRec->vbases_end(); BI != BE; ++BI) {
4769 CXXRecordDecl *base = BI->getType()->getAsCXXRecordDecl();
4770 if (base->isEmpty())
4772 uint64_t offs = layout.getVBaseClassOffsetInBits(base);
4773 if (FieldOrBaseOffsets.find(offs) == FieldOrBaseOffsets.end())
4774 FieldOrBaseOffsets.insert(FieldOrBaseOffsets.end(),
4775 std::make_pair(offs, base));
4781 size = includeVBases ? layout.getSize() : layout.getNonVirtualSize();
4783 size = layout.getSize();
4786 uint64_t CurOffs = 0;
4787 std::multimap<uint64_t, NamedDecl *>::iterator
4788 CurLayObj = FieldOrBaseOffsets.begin();
4790 if ((CurLayObj != FieldOrBaseOffsets.end() && CurLayObj->first != 0) ||
4791 (CurLayObj == FieldOrBaseOffsets.end() &&
4792 CXXRec && CXXRec->isDynamicClass())) {
4793 assert(CXXRec && CXXRec->isDynamicClass() &&
4794 "Offset 0 was empty but no VTable ?");
4797 std::string recname = CXXRec->getNameAsString();
4798 if (recname.empty()) recname = "?";
4803 CurOffs += getTypeSize(VoidPtrTy);
4806 if (!RDecl->hasFlexibleArrayMember()) {
4807 // Mark the end of the structure.
4808 uint64_t offs = toBits(size);
4809 FieldOrBaseOffsets.insert(FieldOrBaseOffsets.upper_bound(offs),
4810 std::make_pair(offs, (NamedDecl*)0));
4813 for (; CurLayObj != FieldOrBaseOffsets.end(); ++CurLayObj) {
4814 assert(CurOffs <= CurLayObj->first);
4816 if (CurOffs < CurLayObj->first) {
4817 uint64_t padding = CurLayObj->first - CurOffs;
4818 // FIXME: There doesn't seem to be a way to indicate in the encoding that
4819 // packing/alignment of members is different that normal, in which case
4820 // the encoding will be out-of-sync with the real layout.
4821 // If the runtime switches to just consider the size of types without
4822 // taking into account alignment, we could make padding explicit in the
4823 // encoding (e.g. using arrays of chars). The encoding strings would be
4824 // longer then though.
4828 NamedDecl *dcl = CurLayObj->second;
4830 break; // reached end of structure.
4832 if (CXXRecordDecl *base = dyn_cast<CXXRecordDecl>(dcl)) {
4833 // We expand the bases without their virtual bases since those are going
4834 // in the initial structure. Note that this differs from gcc which
4835 // expands virtual bases each time one is encountered in the hierarchy,
4836 // making the encoding type bigger than it really is.
4837 getObjCEncodingForStructureImpl(base, S, FD, /*includeVBases*/false);
4838 assert(!base->isEmpty());
4839 CurOffs += toBits(getASTRecordLayout(base).getNonVirtualSize());
4841 FieldDecl *field = cast<FieldDecl>(dcl);
4844 S += field->getNameAsString();
4848 if (field->isBitField()) {
4849 EncodeBitField(this, S, field->getType(), field);
4850 CurOffs += field->getBitWidthValue(*this);
4852 QualType qt = field->getType();
4853 getLegacyIntegralTypeEncoding(qt);
4854 getObjCEncodingForTypeImpl(qt, S, false, true, FD,
4855 /*OutermostType*/false,
4856 /*EncodingProperty*/false,
4857 /*StructField*/true);
4858 CurOffs += getTypeSize(field->getType());
4864 void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT,
4865 std::string& S) const {
4866 if (QT & Decl::OBJC_TQ_In)
4868 if (QT & Decl::OBJC_TQ_Inout)
4870 if (QT & Decl::OBJC_TQ_Out)
4872 if (QT & Decl::OBJC_TQ_Bycopy)
4874 if (QT & Decl::OBJC_TQ_Byref)
4876 if (QT & Decl::OBJC_TQ_Oneway)
4880 void ASTContext::setBuiltinVaListType(QualType T) {
4881 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!");
4883 BuiltinVaListType = T;
4886 TypedefDecl *ASTContext::getObjCIdDecl() const {
4888 QualType T = getObjCObjectType(ObjCBuiltinIdTy, 0, 0);
4889 T = getObjCObjectPointerType(T);
4890 TypeSourceInfo *IdInfo = getTrivialTypeSourceInfo(T);
4891 ObjCIdDecl = TypedefDecl::Create(const_cast<ASTContext &>(*this),
4892 getTranslationUnitDecl(),
4893 SourceLocation(), SourceLocation(),
4894 &Idents.get("id"), IdInfo);
4900 TypedefDecl *ASTContext::getObjCSelDecl() const {
4902 QualType SelT = getPointerType(ObjCBuiltinSelTy);
4903 TypeSourceInfo *SelInfo = getTrivialTypeSourceInfo(SelT);
4904 ObjCSelDecl = TypedefDecl::Create(const_cast<ASTContext &>(*this),
4905 getTranslationUnitDecl(),
4906 SourceLocation(), SourceLocation(),
4907 &Idents.get("SEL"), SelInfo);
4912 TypedefDecl *ASTContext::getObjCClassDecl() const {
4913 if (!ObjCClassDecl) {
4914 QualType T = getObjCObjectType(ObjCBuiltinClassTy, 0, 0);
4915 T = getObjCObjectPointerType(T);
4916 TypeSourceInfo *ClassInfo = getTrivialTypeSourceInfo(T);
4917 ObjCClassDecl = TypedefDecl::Create(const_cast<ASTContext &>(*this),
4918 getTranslationUnitDecl(),
4919 SourceLocation(), SourceLocation(),
4920 &Idents.get("Class"), ClassInfo);
4923 return ObjCClassDecl;
4926 ObjCInterfaceDecl *ASTContext::getObjCProtocolDecl() const {
4927 if (!ObjCProtocolClassDecl) {
4928 ObjCProtocolClassDecl
4929 = ObjCInterfaceDecl::Create(*this, getTranslationUnitDecl(),
4931 &Idents.get("Protocol"),
4933 SourceLocation(), true);
4936 return ObjCProtocolClassDecl;
4939 void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) {
4940 assert(ObjCConstantStringType.isNull() &&
4941 "'NSConstantString' type already set!");
4943 ObjCConstantStringType = getObjCInterfaceType(Decl);
4946 /// \brief Retrieve the template name that corresponds to a non-empty
4949 ASTContext::getOverloadedTemplateName(UnresolvedSetIterator Begin,
4950 UnresolvedSetIterator End) const {
4951 unsigned size = End - Begin;
4952 assert(size > 1 && "set is not overloaded!");
4954 void *memory = Allocate(sizeof(OverloadedTemplateStorage) +
4955 size * sizeof(FunctionTemplateDecl*));
4956 OverloadedTemplateStorage *OT = new(memory) OverloadedTemplateStorage(size);
4958 NamedDecl **Storage = OT->getStorage();
4959 for (UnresolvedSetIterator I = Begin; I != End; ++I) {
4961 assert(isa<FunctionTemplateDecl>(D) ||
4962 (isa<UsingShadowDecl>(D) &&
4963 isa<FunctionTemplateDecl>(D->getUnderlyingDecl())));
4967 return TemplateName(OT);
4970 /// \brief Retrieve the template name that represents a qualified
4971 /// template name such as \c std::vector.
4973 ASTContext::getQualifiedTemplateName(NestedNameSpecifier *NNS,
4974 bool TemplateKeyword,
4975 TemplateDecl *Template) const {
4976 assert(NNS && "Missing nested-name-specifier in qualified template name");
4978 // FIXME: Canonicalization?
4979 llvm::FoldingSetNodeID ID;
4980 QualifiedTemplateName::Profile(ID, NNS, TemplateKeyword, Template);
4982 void *InsertPos = 0;
4983 QualifiedTemplateName *QTN =
4984 QualifiedTemplateNames.FindNodeOrInsertPos(ID, InsertPos);
4986 QTN = new (*this,4) QualifiedTemplateName(NNS, TemplateKeyword, Template);
4987 QualifiedTemplateNames.InsertNode(QTN, InsertPos);
4990 return TemplateName(QTN);
4993 /// \brief Retrieve the template name that represents a dependent
4994 /// template name such as \c MetaFun::template apply.
4996 ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS,
4997 const IdentifierInfo *Name) const {
4998 assert((!NNS || NNS->isDependent()) &&
4999 "Nested name specifier must be dependent");
5001 llvm::FoldingSetNodeID ID;
5002 DependentTemplateName::Profile(ID, NNS, Name);
5004 void *InsertPos = 0;
5005 DependentTemplateName *QTN =
5006 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos);
5009 return TemplateName(QTN);
5011 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS);
5012 if (CanonNNS == NNS) {
5013 QTN = new (*this,4) DependentTemplateName(NNS, Name);
5015 TemplateName Canon = getDependentTemplateName(CanonNNS, Name);
5016 QTN = new (*this,4) DependentTemplateName(NNS, Name, Canon);
5017 DependentTemplateName *CheckQTN =
5018 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos);
5019 assert(!CheckQTN && "Dependent type name canonicalization broken");
5023 DependentTemplateNames.InsertNode(QTN, InsertPos);
5024 return TemplateName(QTN);
5027 /// \brief Retrieve the template name that represents a dependent
5028 /// template name such as \c MetaFun::template operator+.
5030 ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS,
5031 OverloadedOperatorKind Operator) const {
5032 assert((!NNS || NNS->isDependent()) &&
5033 "Nested name specifier must be dependent");
5035 llvm::FoldingSetNodeID ID;
5036 DependentTemplateName::Profile(ID, NNS, Operator);
5038 void *InsertPos = 0;
5039 DependentTemplateName *QTN
5040 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos);
5043 return TemplateName(QTN);
5045 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS);
5046 if (CanonNNS == NNS) {
5047 QTN = new (*this,4) DependentTemplateName(NNS, Operator);
5049 TemplateName Canon = getDependentTemplateName(CanonNNS, Operator);
5050 QTN = new (*this,4) DependentTemplateName(NNS, Operator, Canon);
5052 DependentTemplateName *CheckQTN
5053 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos);
5054 assert(!CheckQTN && "Dependent template name canonicalization broken");
5058 DependentTemplateNames.InsertNode(QTN, InsertPos);
5059 return TemplateName(QTN);
5063 ASTContext::getSubstTemplateTemplateParm(TemplateTemplateParmDecl *param,
5064 TemplateName replacement) const {
5065 llvm::FoldingSetNodeID ID;
5066 SubstTemplateTemplateParmStorage::Profile(ID, param, replacement);
5068 void *insertPos = 0;
5069 SubstTemplateTemplateParmStorage *subst
5070 = SubstTemplateTemplateParms.FindNodeOrInsertPos(ID, insertPos);
5073 subst = new (*this) SubstTemplateTemplateParmStorage(param, replacement);
5074 SubstTemplateTemplateParms.InsertNode(subst, insertPos);
5077 return TemplateName(subst);
5081 ASTContext::getSubstTemplateTemplateParmPack(TemplateTemplateParmDecl *Param,
5082 const TemplateArgument &ArgPack) const {
5083 ASTContext &Self = const_cast<ASTContext &>(*this);
5084 llvm::FoldingSetNodeID ID;
5085 SubstTemplateTemplateParmPackStorage::Profile(ID, Self, Param, ArgPack);
5087 void *InsertPos = 0;
5088 SubstTemplateTemplateParmPackStorage *Subst
5089 = SubstTemplateTemplateParmPacks.FindNodeOrInsertPos(ID, InsertPos);
5092 Subst = new (*this) SubstTemplateTemplateParmPackStorage(Param,
5093 ArgPack.pack_size(),
5094 ArgPack.pack_begin());
5095 SubstTemplateTemplateParmPacks.InsertNode(Subst, InsertPos);
5098 return TemplateName(Subst);
5101 /// getFromTargetType - Given one of the integer types provided by
5102 /// TargetInfo, produce the corresponding type. The unsigned @p Type
5103 /// is actually a value of type @c TargetInfo::IntType.
5104 CanQualType ASTContext::getFromTargetType(unsigned Type) const {
5106 case TargetInfo::NoInt: return CanQualType();
5107 case TargetInfo::SignedShort: return ShortTy;
5108 case TargetInfo::UnsignedShort: return UnsignedShortTy;
5109 case TargetInfo::SignedInt: return IntTy;
5110 case TargetInfo::UnsignedInt: return UnsignedIntTy;
5111 case TargetInfo::SignedLong: return LongTy;
5112 case TargetInfo::UnsignedLong: return UnsignedLongTy;
5113 case TargetInfo::SignedLongLong: return LongLongTy;
5114 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy;
5117 llvm_unreachable("Unhandled TargetInfo::IntType value");
5120 //===----------------------------------------------------------------------===//
5122 //===----------------------------------------------------------------------===//
5124 /// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's
5125 /// garbage collection attribute.
5127 Qualifiers::GC ASTContext::getObjCGCAttrKind(QualType Ty) const {
5128 if (getLangOpts().getGC() == LangOptions::NonGC)
5129 return Qualifiers::GCNone;
5131 assert(getLangOpts().ObjC1);
5132 Qualifiers::GC GCAttrs = Ty.getObjCGCAttr();
5134 // Default behaviour under objective-C's gc is for ObjC pointers
5135 // (or pointers to them) be treated as though they were declared
5137 if (GCAttrs == Qualifiers::GCNone) {
5138 if (Ty->isObjCObjectPointerType() || Ty->isBlockPointerType())
5139 return Qualifiers::Strong;
5140 else if (Ty->isPointerType())
5141 return getObjCGCAttrKind(Ty->getAs<PointerType>()->getPointeeType());
5143 // It's not valid to set GC attributes on anything that isn't a
5146 QualType CT = Ty->getCanonicalTypeInternal();
5147 while (const ArrayType *AT = dyn_cast<ArrayType>(CT))
5148 CT = AT->getElementType();
5149 assert(CT->isAnyPointerType() || CT->isBlockPointerType());
5155 //===----------------------------------------------------------------------===//
5156 // Type Compatibility Testing
5157 //===----------------------------------------------------------------------===//
5159 /// areCompatVectorTypes - Return true if the two specified vector types are
5161 static bool areCompatVectorTypes(const VectorType *LHS,
5162 const VectorType *RHS) {
5163 assert(LHS->isCanonicalUnqualified() && RHS->isCanonicalUnqualified());
5164 return LHS->getElementType() == RHS->getElementType() &&
5165 LHS->getNumElements() == RHS->getNumElements();
5168 bool ASTContext::areCompatibleVectorTypes(QualType FirstVec,
5169 QualType SecondVec) {
5170 assert(FirstVec->isVectorType() && "FirstVec should be a vector type");
5171 assert(SecondVec->isVectorType() && "SecondVec should be a vector type");
5173 if (hasSameUnqualifiedType(FirstVec, SecondVec))
5176 // Treat Neon vector types and most AltiVec vector types as if they are the
5177 // equivalent GCC vector types.
5178 const VectorType *First = FirstVec->getAs<VectorType>();
5179 const VectorType *Second = SecondVec->getAs<VectorType>();
5180 if (First->getNumElements() == Second->getNumElements() &&
5181 hasSameType(First->getElementType(), Second->getElementType()) &&
5182 First->getVectorKind() != VectorType::AltiVecPixel &&
5183 First->getVectorKind() != VectorType::AltiVecBool &&
5184 Second->getVectorKind() != VectorType::AltiVecPixel &&
5185 Second->getVectorKind() != VectorType::AltiVecBool)
5191 //===----------------------------------------------------------------------===//
5192 // ObjCQualifiedIdTypesAreCompatible - Compatibility testing for qualified id's.
5193 //===----------------------------------------------------------------------===//
5195 /// ProtocolCompatibleWithProtocol - return 'true' if 'lProto' is in the
5196 /// inheritance hierarchy of 'rProto'.
5198 ASTContext::ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto,
5199 ObjCProtocolDecl *rProto) const {
5200 if (declaresSameEntity(lProto, rProto))
5202 for (ObjCProtocolDecl::protocol_iterator PI = rProto->protocol_begin(),
5203 E = rProto->protocol_end(); PI != E; ++PI)
5204 if (ProtocolCompatibleWithProtocol(lProto, *PI))
5209 /// QualifiedIdConformsQualifiedId - compare id<p,...> with id<p1,...>
5210 /// return true if lhs's protocols conform to rhs's protocol; false
5212 bool ASTContext::QualifiedIdConformsQualifiedId(QualType lhs, QualType rhs) {
5213 if (lhs->isObjCQualifiedIdType() && rhs->isObjCQualifiedIdType())
5214 return ObjCQualifiedIdTypesAreCompatible(lhs, rhs, false);
5218 /// ObjCQualifiedClassTypesAreCompatible - compare Class<p,...> and
5220 bool ASTContext::ObjCQualifiedClassTypesAreCompatible(QualType lhs,
5222 const ObjCObjectPointerType *lhsQID = lhs->getAs<ObjCObjectPointerType>();
5223 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>();
5224 assert ((lhsQID && rhsOPT) && "ObjCQualifiedClassTypesAreCompatible");
5226 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(),
5227 E = lhsQID->qual_end(); I != E; ++I) {
5229 ObjCProtocolDecl *lhsProto = *I;
5230 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(),
5231 E = rhsOPT->qual_end(); J != E; ++J) {
5232 ObjCProtocolDecl *rhsProto = *J;
5233 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto)) {
5244 /// ObjCQualifiedIdTypesAreCompatible - We know that one of lhs/rhs is an
5245 /// ObjCQualifiedIDType.
5246 bool ASTContext::ObjCQualifiedIdTypesAreCompatible(QualType lhs, QualType rhs,
5248 // Allow id<P..> and an 'id' or void* type in all cases.
5249 if (lhs->isVoidPointerType() ||
5250 lhs->isObjCIdType() || lhs->isObjCClassType())
5252 else if (rhs->isVoidPointerType() ||
5253 rhs->isObjCIdType() || rhs->isObjCClassType())
5256 if (const ObjCObjectPointerType *lhsQID = lhs->getAsObjCQualifiedIdType()) {
5257 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>();
5259 if (!rhsOPT) return false;
5261 if (rhsOPT->qual_empty()) {
5262 // If the RHS is a unqualified interface pointer "NSString*",
5263 // make sure we check the class hierarchy.
5264 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) {
5265 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(),
5266 E = lhsQID->qual_end(); I != E; ++I) {
5267 // when comparing an id<P> on lhs with a static type on rhs,
5268 // see if static class implements all of id's protocols, directly or
5269 // through its super class and categories.
5270 if (!rhsID->ClassImplementsProtocol(*I, true))
5274 // If there are no qualifiers and no interface, we have an 'id'.
5277 // Both the right and left sides have qualifiers.
5278 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(),
5279 E = lhsQID->qual_end(); I != E; ++I) {
5280 ObjCProtocolDecl *lhsProto = *I;
5283 // when comparing an id<P> on lhs with a static type on rhs,
5284 // see if static class implements all of id's protocols, directly or
5285 // through its super class and categories.
5286 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(),
5287 E = rhsOPT->qual_end(); J != E; ++J) {
5288 ObjCProtocolDecl *rhsProto = *J;
5289 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) ||
5290 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) {
5295 // If the RHS is a qualified interface pointer "NSString<P>*",
5296 // make sure we check the class hierarchy.
5297 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) {
5298 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(),
5299 E = lhsQID->qual_end(); I != E; ++I) {
5300 // when comparing an id<P> on lhs with a static type on rhs,
5301 // see if static class implements all of id's protocols, directly or
5302 // through its super class and categories.
5303 if (rhsID->ClassImplementsProtocol(*I, true)) {
5316 const ObjCObjectPointerType *rhsQID = rhs->getAsObjCQualifiedIdType();
5317 assert(rhsQID && "One of the LHS/RHS should be id<x>");
5319 if (const ObjCObjectPointerType *lhsOPT =
5320 lhs->getAsObjCInterfacePointerType()) {
5321 // If both the right and left sides have qualifiers.
5322 for (ObjCObjectPointerType::qual_iterator I = lhsOPT->qual_begin(),
5323 E = lhsOPT->qual_end(); I != E; ++I) {
5324 ObjCProtocolDecl *lhsProto = *I;
5327 // when comparing an id<P> on rhs with a static type on lhs,
5328 // see if static class implements all of id's protocols, directly or
5329 // through its super class and categories.
5330 // First, lhs protocols in the qualifier list must be found, direct
5331 // or indirect in rhs's qualifier list or it is a mismatch.
5332 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(),
5333 E = rhsQID->qual_end(); J != E; ++J) {
5334 ObjCProtocolDecl *rhsProto = *J;
5335 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) ||
5336 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) {
5345 // Static class's protocols, or its super class or category protocols
5346 // must be found, direct or indirect in rhs's qualifier list or it is a mismatch.
5347 if (ObjCInterfaceDecl *lhsID = lhsOPT->getInterfaceDecl()) {
5348 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols;
5349 CollectInheritedProtocols(lhsID, LHSInheritedProtocols);
5350 // This is rather dubious but matches gcc's behavior. If lhs has
5351 // no type qualifier and its class has no static protocol(s)
5352 // assume that it is mismatch.
5353 if (LHSInheritedProtocols.empty() && lhsOPT->qual_empty())
5355 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I =
5356 LHSInheritedProtocols.begin(),
5357 E = LHSInheritedProtocols.end(); I != E; ++I) {
5359 ObjCProtocolDecl *lhsProto = (*I);
5360 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(),
5361 E = rhsQID->qual_end(); J != E; ++J) {
5362 ObjCProtocolDecl *rhsProto = *J;
5363 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) ||
5364 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) {
5378 /// canAssignObjCInterfaces - Return true if the two interface types are
5379 /// compatible for assignment from RHS to LHS. This handles validation of any
5380 /// protocol qualifiers on the LHS or RHS.
5382 bool ASTContext::canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT,
5383 const ObjCObjectPointerType *RHSOPT) {
5384 const ObjCObjectType* LHS = LHSOPT->getObjectType();
5385 const ObjCObjectType* RHS = RHSOPT->getObjectType();
5387 // If either type represents the built-in 'id' or 'Class' types, return true.
5388 if (LHS->isObjCUnqualifiedIdOrClass() ||
5389 RHS->isObjCUnqualifiedIdOrClass())
5392 if (LHS->isObjCQualifiedId() || RHS->isObjCQualifiedId())
5393 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0),
5397 if (LHS->isObjCQualifiedClass() && RHS->isObjCQualifiedClass())
5398 return ObjCQualifiedClassTypesAreCompatible(QualType(LHSOPT,0),
5399 QualType(RHSOPT,0));
5401 // If we have 2 user-defined types, fall into that path.
5402 if (LHS->getInterface() && RHS->getInterface())
5403 return canAssignObjCInterfaces(LHS, RHS);
5408 /// canAssignObjCInterfacesInBlockPointer - This routine is specifically written
5409 /// for providing type-safety for objective-c pointers used to pass/return
5410 /// arguments in block literals. When passed as arguments, passing 'A*' where
5411 /// 'id' is expected is not OK. Passing 'Sub *" where 'Super *" is expected is
5412 /// not OK. For the return type, the opposite is not OK.
5413 bool ASTContext::canAssignObjCInterfacesInBlockPointer(
5414 const ObjCObjectPointerType *LHSOPT,
5415 const ObjCObjectPointerType *RHSOPT,
5416 bool BlockReturnType) {
5417 if (RHSOPT->isObjCBuiltinType() || LHSOPT->isObjCIdType())
5420 if (LHSOPT->isObjCBuiltinType()) {
5421 return RHSOPT->isObjCBuiltinType() || RHSOPT->isObjCQualifiedIdType();
5424 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType())
5425 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0),
5429 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType();
5430 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType();
5431 if (LHS && RHS) { // We have 2 user-defined types.
5433 if (LHS->getDecl()->isSuperClassOf(RHS->getDecl()))
5434 return BlockReturnType;
5435 if (RHS->getDecl()->isSuperClassOf(LHS->getDecl()))
5436 return !BlockReturnType;
5444 /// getIntersectionOfProtocols - This routine finds the intersection of set
5445 /// of protocols inherited from two distinct objective-c pointer objects.
5446 /// It is used to build composite qualifier list of the composite type of
5447 /// the conditional expression involving two objective-c pointer objects.
5449 void getIntersectionOfProtocols(ASTContext &Context,
5450 const ObjCObjectPointerType *LHSOPT,
5451 const ObjCObjectPointerType *RHSOPT,
5452 SmallVectorImpl<ObjCProtocolDecl *> &IntersectionOfProtocols) {
5454 const ObjCObjectType* LHS = LHSOPT->getObjectType();
5455 const ObjCObjectType* RHS = RHSOPT->getObjectType();
5456 assert(LHS->getInterface() && "LHS must have an interface base");
5457 assert(RHS->getInterface() && "RHS must have an interface base");
5459 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> InheritedProtocolSet;
5460 unsigned LHSNumProtocols = LHS->getNumProtocols();
5461 if (LHSNumProtocols > 0)
5462 InheritedProtocolSet.insert(LHS->qual_begin(), LHS->qual_end());
5464 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols;
5465 Context.CollectInheritedProtocols(LHS->getInterface(),
5466 LHSInheritedProtocols);
5467 InheritedProtocolSet.insert(LHSInheritedProtocols.begin(),
5468 LHSInheritedProtocols.end());
5471 unsigned RHSNumProtocols = RHS->getNumProtocols();
5472 if (RHSNumProtocols > 0) {
5473 ObjCProtocolDecl **RHSProtocols =
5474 const_cast<ObjCProtocolDecl **>(RHS->qual_begin());
5475 for (unsigned i = 0; i < RHSNumProtocols; ++i)
5476 if (InheritedProtocolSet.count(RHSProtocols[i]))
5477 IntersectionOfProtocols.push_back(RHSProtocols[i]);
5479 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> RHSInheritedProtocols;
5480 Context.CollectInheritedProtocols(RHS->getInterface(),
5481 RHSInheritedProtocols);
5482 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I =
5483 RHSInheritedProtocols.begin(),
5484 E = RHSInheritedProtocols.end(); I != E; ++I)
5485 if (InheritedProtocolSet.count((*I)))
5486 IntersectionOfProtocols.push_back((*I));
5490 /// areCommonBaseCompatible - Returns common base class of the two classes if
5491 /// one found. Note that this is O'2 algorithm. But it will be called as the
5492 /// last type comparison in a ?-exp of ObjC pointer types before a
5493 /// warning is issued. So, its invokation is extremely rare.
5494 QualType ASTContext::areCommonBaseCompatible(
5495 const ObjCObjectPointerType *Lptr,
5496 const ObjCObjectPointerType *Rptr) {
5497 const ObjCObjectType *LHS = Lptr->getObjectType();
5498 const ObjCObjectType *RHS = Rptr->getObjectType();
5499 const ObjCInterfaceDecl* LDecl = LHS->getInterface();
5500 const ObjCInterfaceDecl* RDecl = RHS->getInterface();
5501 if (!LDecl || !RDecl || (declaresSameEntity(LDecl, RDecl)))
5505 LHS = cast<ObjCInterfaceType>(getObjCInterfaceType(LDecl));
5506 if (canAssignObjCInterfaces(LHS, RHS)) {
5507 SmallVector<ObjCProtocolDecl *, 8> Protocols;
5508 getIntersectionOfProtocols(*this, Lptr, Rptr, Protocols);
5510 QualType Result = QualType(LHS, 0);
5511 if (!Protocols.empty())
5512 Result = getObjCObjectType(Result, Protocols.data(), Protocols.size());
5513 Result = getObjCObjectPointerType(Result);
5516 } while ((LDecl = LDecl->getSuperClass()));
5521 bool ASTContext::canAssignObjCInterfaces(const ObjCObjectType *LHS,
5522 const ObjCObjectType *RHS) {
5523 assert(LHS->getInterface() && "LHS is not an interface type");
5524 assert(RHS->getInterface() && "RHS is not an interface type");
5526 // Verify that the base decls are compatible: the RHS must be a subclass of
5528 if (!LHS->getInterface()->isSuperClassOf(RHS->getInterface()))
5531 // RHS must have a superset of the protocols in the LHS. If the LHS is not
5532 // protocol qualified at all, then we are good.
5533 if (LHS->getNumProtocols() == 0)
5536 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't,
5537 // more detailed analysis is required.
5538 if (RHS->getNumProtocols() == 0) {
5539 // OK, if LHS is a superclass of RHS *and*
5540 // this superclass is assignment compatible with LHS.
5543 LHS->getInterface()->isSuperClassOf(RHS->getInterface());
5545 // OK if conversion of LHS to SuperClass results in narrowing of types
5546 // ; i.e., SuperClass may implement at least one of the protocols
5547 // in LHS's protocol list. Example, SuperObj<P1> = lhs<P1,P2> is ok.
5548 // But not SuperObj<P1,P2,P3> = lhs<P1,P2>.
5549 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> SuperClassInheritedProtocols;
5550 CollectInheritedProtocols(RHS->getInterface(), SuperClassInheritedProtocols);
5551 // If super class has no protocols, it is not a match.
5552 if (SuperClassInheritedProtocols.empty())
5555 for (ObjCObjectType::qual_iterator LHSPI = LHS->qual_begin(),
5556 LHSPE = LHS->qual_end();
5557 LHSPI != LHSPE; LHSPI++) {
5558 bool SuperImplementsProtocol = false;
5559 ObjCProtocolDecl *LHSProto = (*LHSPI);
5561 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I =
5562 SuperClassInheritedProtocols.begin(),
5563 E = SuperClassInheritedProtocols.end(); I != E; ++I) {
5564 ObjCProtocolDecl *SuperClassProto = (*I);
5565 if (SuperClassProto->lookupProtocolNamed(LHSProto->getIdentifier())) {
5566 SuperImplementsProtocol = true;
5570 if (!SuperImplementsProtocol)
5578 for (ObjCObjectType::qual_iterator LHSPI = LHS->qual_begin(),
5579 LHSPE = LHS->qual_end();
5580 LHSPI != LHSPE; LHSPI++) {
5581 bool RHSImplementsProtocol = false;
5583 // If the RHS doesn't implement the protocol on the left, the types
5584 // are incompatible.
5585 for (ObjCObjectType::qual_iterator RHSPI = RHS->qual_begin(),
5586 RHSPE = RHS->qual_end();
5587 RHSPI != RHSPE; RHSPI++) {
5588 if ((*RHSPI)->lookupProtocolNamed((*LHSPI)->getIdentifier())) {
5589 RHSImplementsProtocol = true;
5593 // FIXME: For better diagnostics, consider passing back the protocol name.
5594 if (!RHSImplementsProtocol)
5597 // The RHS implements all protocols listed on the LHS.
5601 bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) {
5602 // get the "pointed to" types
5603 const ObjCObjectPointerType *LHSOPT = LHS->getAs<ObjCObjectPointerType>();
5604 const ObjCObjectPointerType *RHSOPT = RHS->getAs<ObjCObjectPointerType>();
5606 if (!LHSOPT || !RHSOPT)
5609 return canAssignObjCInterfaces(LHSOPT, RHSOPT) ||
5610 canAssignObjCInterfaces(RHSOPT, LHSOPT);
5613 bool ASTContext::canBindObjCObjectType(QualType To, QualType From) {
5614 return canAssignObjCInterfaces(
5615 getObjCObjectPointerType(To)->getAs<ObjCObjectPointerType>(),
5616 getObjCObjectPointerType(From)->getAs<ObjCObjectPointerType>());
5619 /// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible,
5620 /// both shall have the identically qualified version of a compatible type.
5621 /// C99 6.2.7p1: Two types have compatible types if their types are the
5622 /// same. See 6.7.[2,3,5] for additional rules.
5623 bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS,
5624 bool CompareUnqualified) {
5625 if (getLangOpts().CPlusPlus)
5626 return hasSameType(LHS, RHS);
5628 return !mergeTypes(LHS, RHS, false, CompareUnqualified).isNull();
5631 bool ASTContext::propertyTypesAreCompatible(QualType LHS, QualType RHS) {
5632 return typesAreCompatible(LHS, RHS);
5635 bool ASTContext::typesAreBlockPointerCompatible(QualType LHS, QualType RHS) {
5636 return !mergeTypes(LHS, RHS, true).isNull();
5639 /// mergeTransparentUnionType - if T is a transparent union type and a member
5640 /// of T is compatible with SubType, return the merged type, else return
5642 QualType ASTContext::mergeTransparentUnionType(QualType T, QualType SubType,
5643 bool OfBlockPointer,
5645 if (const RecordType *UT = T->getAsUnionType()) {
5646 RecordDecl *UD = UT->getDecl();
5647 if (UD->hasAttr<TransparentUnionAttr>()) {
5648 for (RecordDecl::field_iterator it = UD->field_begin(),
5649 itend = UD->field_end(); it != itend; ++it) {
5650 QualType ET = it->getType().getUnqualifiedType();
5651 QualType MT = mergeTypes(ET, SubType, OfBlockPointer, Unqualified);
5661 /// mergeFunctionArgumentTypes - merge two types which appear as function
5663 QualType ASTContext::mergeFunctionArgumentTypes(QualType lhs, QualType rhs,
5664 bool OfBlockPointer,
5666 // GNU extension: two types are compatible if they appear as a function
5667 // argument, one of the types is a transparent union type and the other
5668 // type is compatible with a union member
5669 QualType lmerge = mergeTransparentUnionType(lhs, rhs, OfBlockPointer,
5671 if (!lmerge.isNull())
5674 QualType rmerge = mergeTransparentUnionType(rhs, lhs, OfBlockPointer,
5676 if (!rmerge.isNull())
5679 return mergeTypes(lhs, rhs, OfBlockPointer, Unqualified);
5682 QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs,
5683 bool OfBlockPointer,
5685 const FunctionType *lbase = lhs->getAs<FunctionType>();
5686 const FunctionType *rbase = rhs->getAs<FunctionType>();
5687 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase);
5688 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase);
5689 bool allLTypes = true;
5690 bool allRTypes = true;
5692 // Check return type
5694 if (OfBlockPointer) {
5695 QualType RHS = rbase->getResultType();
5696 QualType LHS = lbase->getResultType();
5697 bool UnqualifiedResult = Unqualified;
5698 if (!UnqualifiedResult)
5699 UnqualifiedResult = (!RHS.hasQualifiers() && LHS.hasQualifiers());
5700 retType = mergeTypes(LHS, RHS, true, UnqualifiedResult, true);
5703 retType = mergeTypes(lbase->getResultType(), rbase->getResultType(), false,
5705 if (retType.isNull()) return QualType();
5708 retType = retType.getUnqualifiedType();
5710 CanQualType LRetType = getCanonicalType(lbase->getResultType());
5711 CanQualType RRetType = getCanonicalType(rbase->getResultType());
5713 LRetType = LRetType.getUnqualifiedType();
5714 RRetType = RRetType.getUnqualifiedType();
5717 if (getCanonicalType(retType) != LRetType)
5719 if (getCanonicalType(retType) != RRetType)
5722 // FIXME: double check this
5723 // FIXME: should we error if lbase->getRegParmAttr() != 0 &&
5724 // rbase->getRegParmAttr() != 0 &&
5725 // lbase->getRegParmAttr() != rbase->getRegParmAttr()?
5726 FunctionType::ExtInfo lbaseInfo = lbase->getExtInfo();
5727 FunctionType::ExtInfo rbaseInfo = rbase->getExtInfo();
5729 // Compatible functions must have compatible calling conventions
5730 if (!isSameCallConv(lbaseInfo.getCC(), rbaseInfo.getCC()))
5733 // Regparm is part of the calling convention.
5734 if (lbaseInfo.getHasRegParm() != rbaseInfo.getHasRegParm())
5736 if (lbaseInfo.getRegParm() != rbaseInfo.getRegParm())
5739 if (lbaseInfo.getProducesResult() != rbaseInfo.getProducesResult())
5742 // functypes which return are preferred over those that do not.
5743 if (lbaseInfo.getNoReturn() && !rbaseInfo.getNoReturn())
5745 else if (!lbaseInfo.getNoReturn() && rbaseInfo.getNoReturn())
5747 // FIXME: some uses, e.g. conditional exprs, really want this to be 'both'.
5748 bool NoReturn = lbaseInfo.getNoReturn() || rbaseInfo.getNoReturn();
5750 FunctionType::ExtInfo einfo = lbaseInfo.withNoReturn(NoReturn);
5752 if (lproto && rproto) { // two C99 style function prototypes
5753 assert(!lproto->hasExceptionSpec() && !rproto->hasExceptionSpec() &&
5754 "C++ shouldn't be here");
5755 unsigned lproto_nargs = lproto->getNumArgs();
5756 unsigned rproto_nargs = rproto->getNumArgs();
5758 // Compatible functions must have the same number of arguments
5759 if (lproto_nargs != rproto_nargs)
5762 // Variadic and non-variadic functions aren't compatible
5763 if (lproto->isVariadic() != rproto->isVariadic())
5766 if (lproto->getTypeQuals() != rproto->getTypeQuals())
5769 if (LangOpts.ObjCAutoRefCount &&
5770 !FunctionTypesMatchOnNSConsumedAttrs(rproto, lproto))
5773 // Check argument compatibility
5774 SmallVector<QualType, 10> types;
5775 for (unsigned i = 0; i < lproto_nargs; i++) {
5776 QualType largtype = lproto->getArgType(i).getUnqualifiedType();
5777 QualType rargtype = rproto->getArgType(i).getUnqualifiedType();
5778 QualType argtype = mergeFunctionArgumentTypes(largtype, rargtype,
5781 if (argtype.isNull()) return QualType();
5784 argtype = argtype.getUnqualifiedType();
5786 types.push_back(argtype);
5788 largtype = largtype.getUnqualifiedType();
5789 rargtype = rargtype.getUnqualifiedType();
5792 if (getCanonicalType(argtype) != getCanonicalType(largtype))
5794 if (getCanonicalType(argtype) != getCanonicalType(rargtype))
5798 if (allLTypes) return lhs;
5799 if (allRTypes) return rhs;
5801 FunctionProtoType::ExtProtoInfo EPI = lproto->getExtProtoInfo();
5802 EPI.ExtInfo = einfo;
5803 return getFunctionType(retType, types.begin(), types.size(), EPI);
5806 if (lproto) allRTypes = false;
5807 if (rproto) allLTypes = false;
5809 const FunctionProtoType *proto = lproto ? lproto : rproto;
5811 assert(!proto->hasExceptionSpec() && "C++ shouldn't be here");
5812 if (proto->isVariadic()) return QualType();
5813 // Check that the types are compatible with the types that
5814 // would result from default argument promotions (C99 6.7.5.3p15).
5815 // The only types actually affected are promotable integer
5816 // types and floats, which would be passed as a different
5817 // type depending on whether the prototype is visible.
5818 unsigned proto_nargs = proto->getNumArgs();
5819 for (unsigned i = 0; i < proto_nargs; ++i) {
5820 QualType argTy = proto->getArgType(i);
5822 // Look at the promotion type of enum types, since that is the type used
5823 // to pass enum values.
5824 if (const EnumType *Enum = argTy->getAs<EnumType>())
5825 argTy = Enum->getDecl()->getPromotionType();
5827 if (argTy->isPromotableIntegerType() ||
5828 getCanonicalType(argTy).getUnqualifiedType() == FloatTy)
5832 if (allLTypes) return lhs;
5833 if (allRTypes) return rhs;
5835 FunctionProtoType::ExtProtoInfo EPI = proto->getExtProtoInfo();
5836 EPI.ExtInfo = einfo;
5837 return getFunctionType(retType, proto->arg_type_begin(),
5838 proto->getNumArgs(), EPI);
5841 if (allLTypes) return lhs;
5842 if (allRTypes) return rhs;
5843 return getFunctionNoProtoType(retType, einfo);
5846 QualType ASTContext::mergeTypes(QualType LHS, QualType RHS,
5847 bool OfBlockPointer,
5848 bool Unqualified, bool BlockReturnType) {
5849 // C++ [expr]: If an expression initially has the type "reference to T", the
5850 // type is adjusted to "T" prior to any further analysis, the expression
5851 // designates the object or function denoted by the reference, and the
5852 // expression is an lvalue unless the reference is an rvalue reference and
5853 // the expression is a function call (possibly inside parentheses).
5854 assert(!LHS->getAs<ReferenceType>() && "LHS is a reference type?");
5855 assert(!RHS->getAs<ReferenceType>() && "RHS is a reference type?");
5858 LHS = LHS.getUnqualifiedType();
5859 RHS = RHS.getUnqualifiedType();
5862 QualType LHSCan = getCanonicalType(LHS),
5863 RHSCan = getCanonicalType(RHS);
5865 // If two types are identical, they are compatible.
5866 if (LHSCan == RHSCan)
5869 // If the qualifiers are different, the types aren't compatible... mostly.
5870 Qualifiers LQuals = LHSCan.getLocalQualifiers();
5871 Qualifiers RQuals = RHSCan.getLocalQualifiers();
5872 if (LQuals != RQuals) {
5873 // If any of these qualifiers are different, we have a type
5875 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() ||
5876 LQuals.getAddressSpace() != RQuals.getAddressSpace() ||
5877 LQuals.getObjCLifetime() != RQuals.getObjCLifetime())
5880 // Exactly one GC qualifier difference is allowed: __strong is
5881 // okay if the other type has no GC qualifier but is an Objective
5882 // C object pointer (i.e. implicitly strong by default). We fix
5883 // this by pretending that the unqualified type was actually
5884 // qualified __strong.
5885 Qualifiers::GC GC_L = LQuals.getObjCGCAttr();
5886 Qualifiers::GC GC_R = RQuals.getObjCGCAttr();
5887 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements");
5889 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak)
5892 if (GC_L == Qualifiers::Strong && RHSCan->isObjCObjectPointerType()) {
5893 return mergeTypes(LHS, getObjCGCQualType(RHS, Qualifiers::Strong));
5895 if (GC_R == Qualifiers::Strong && LHSCan->isObjCObjectPointerType()) {
5896 return mergeTypes(getObjCGCQualType(LHS, Qualifiers::Strong), RHS);
5901 // Okay, qualifiers are equal.
5903 Type::TypeClass LHSClass = LHSCan->getTypeClass();
5904 Type::TypeClass RHSClass = RHSCan->getTypeClass();
5906 // We want to consider the two function types to be the same for these
5907 // comparisons, just force one to the other.
5908 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto;
5909 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto;
5911 // Same as above for arrays
5912 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray)
5913 LHSClass = Type::ConstantArray;
5914 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray)
5915 RHSClass = Type::ConstantArray;
5917 // ObjCInterfaces are just specialized ObjCObjects.
5918 if (LHSClass == Type::ObjCInterface) LHSClass = Type::ObjCObject;
5919 if (RHSClass == Type::ObjCInterface) RHSClass = Type::ObjCObject;
5921 // Canonicalize ExtVector -> Vector.
5922 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector;
5923 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector;
5925 // If the canonical type classes don't match.
5926 if (LHSClass != RHSClass) {
5927 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char,
5928 // a signed integer type, or an unsigned integer type.
5929 // Compatibility is based on the underlying type, not the promotion
5931 if (const EnumType* ETy = LHS->getAs<EnumType>()) {
5932 QualType TINT = ETy->getDecl()->getIntegerType();
5933 if (!TINT.isNull() && hasSameType(TINT, RHSCan.getUnqualifiedType()))
5936 if (const EnumType* ETy = RHS->getAs<EnumType>()) {
5937 QualType TINT = ETy->getDecl()->getIntegerType();
5938 if (!TINT.isNull() && hasSameType(TINT, LHSCan.getUnqualifiedType()))
5941 // allow block pointer type to match an 'id' type.
5942 if (OfBlockPointer && !BlockReturnType) {
5943 if (LHS->isObjCIdType() && RHS->isBlockPointerType())
5945 if (RHS->isObjCIdType() && LHS->isBlockPointerType())
5952 // The canonical type classes match.
5954 #define TYPE(Class, Base)
5955 #define ABSTRACT_TYPE(Class, Base)
5956 #define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) case Type::Class:
5957 #define NON_CANONICAL_TYPE(Class, Base) case Type::Class:
5958 #define DEPENDENT_TYPE(Class, Base) case Type::Class:
5959 #include "clang/AST/TypeNodes.def"
5960 llvm_unreachable("Non-canonical and dependent types shouldn't get here");
5962 case Type::LValueReference:
5963 case Type::RValueReference:
5964 case Type::MemberPointer:
5965 llvm_unreachable("C++ should never be in mergeTypes");
5967 case Type::ObjCInterface:
5968 case Type::IncompleteArray:
5969 case Type::VariableArray:
5970 case Type::FunctionProto:
5971 case Type::ExtVector:
5972 llvm_unreachable("Types are eliminated above");
5976 // Merge two pointer types, while trying to preserve typedef info
5977 QualType LHSPointee = LHS->getAs<PointerType>()->getPointeeType();
5978 QualType RHSPointee = RHS->getAs<PointerType>()->getPointeeType();
5980 LHSPointee = LHSPointee.getUnqualifiedType();
5981 RHSPointee = RHSPointee.getUnqualifiedType();
5983 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, false,
5985 if (ResultType.isNull()) return QualType();
5986 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType))
5988 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType))
5990 return getPointerType(ResultType);
5992 case Type::BlockPointer:
5994 // Merge two block pointer types, while trying to preserve typedef info
5995 QualType LHSPointee = LHS->getAs<BlockPointerType>()->getPointeeType();
5996 QualType RHSPointee = RHS->getAs<BlockPointerType>()->getPointeeType();
5998 LHSPointee = LHSPointee.getUnqualifiedType();
5999 RHSPointee = RHSPointee.getUnqualifiedType();
6001 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, OfBlockPointer,
6003 if (ResultType.isNull()) return QualType();
6004 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType))
6006 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType))
6008 return getBlockPointerType(ResultType);
6012 // Merge two pointer types, while trying to preserve typedef info
6013 QualType LHSValue = LHS->getAs<AtomicType>()->getValueType();
6014 QualType RHSValue = RHS->getAs<AtomicType>()->getValueType();
6016 LHSValue = LHSValue.getUnqualifiedType();
6017 RHSValue = RHSValue.getUnqualifiedType();
6019 QualType ResultType = mergeTypes(LHSValue, RHSValue, false,
6021 if (ResultType.isNull()) return QualType();
6022 if (getCanonicalType(LHSValue) == getCanonicalType(ResultType))
6024 if (getCanonicalType(RHSValue) == getCanonicalType(ResultType))
6026 return getAtomicType(ResultType);
6028 case Type::ConstantArray:
6030 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS);
6031 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS);
6032 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize())
6035 QualType LHSElem = getAsArrayType(LHS)->getElementType();
6036 QualType RHSElem = getAsArrayType(RHS)->getElementType();
6038 LHSElem = LHSElem.getUnqualifiedType();
6039 RHSElem = RHSElem.getUnqualifiedType();
6042 QualType ResultType = mergeTypes(LHSElem, RHSElem, false, Unqualified);
6043 if (ResultType.isNull()) return QualType();
6044 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType))
6046 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType))
6048 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(),
6049 ArrayType::ArraySizeModifier(), 0);
6050 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(),
6051 ArrayType::ArraySizeModifier(), 0);
6052 const VariableArrayType* LVAT = getAsVariableArrayType(LHS);
6053 const VariableArrayType* RVAT = getAsVariableArrayType(RHS);
6054 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType))
6056 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType))
6059 // FIXME: This isn't correct! But tricky to implement because
6060 // the array's size has to be the size of LHS, but the type
6061 // has to be different.
6065 // FIXME: This isn't correct! But tricky to implement because
6066 // the array's size has to be the size of RHS, but the type
6067 // has to be different.
6070 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS;
6071 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS;
6072 return getIncompleteArrayType(ResultType,
6073 ArrayType::ArraySizeModifier(), 0);
6075 case Type::FunctionNoProto:
6076 return mergeFunctionTypes(LHS, RHS, OfBlockPointer, Unqualified);
6081 // Only exactly equal builtin types are compatible, which is tested above.
6084 // Distinct complex types are incompatible.
6087 // FIXME: The merged type should be an ExtVector!
6088 if (areCompatVectorTypes(LHSCan->getAs<VectorType>(),
6089 RHSCan->getAs<VectorType>()))
6092 case Type::ObjCObject: {
6093 // Check if the types are assignment compatible.
6094 // FIXME: This should be type compatibility, e.g. whether
6095 // "LHS x; RHS x;" at global scope is legal.
6096 const ObjCObjectType* LHSIface = LHS->getAs<ObjCObjectType>();
6097 const ObjCObjectType* RHSIface = RHS->getAs<ObjCObjectType>();
6098 if (canAssignObjCInterfaces(LHSIface, RHSIface))
6103 case Type::ObjCObjectPointer: {
6104 if (OfBlockPointer) {
6105 if (canAssignObjCInterfacesInBlockPointer(
6106 LHS->getAs<ObjCObjectPointerType>(),
6107 RHS->getAs<ObjCObjectPointerType>(),
6112 if (canAssignObjCInterfaces(LHS->getAs<ObjCObjectPointerType>(),
6113 RHS->getAs<ObjCObjectPointerType>()))
6120 llvm_unreachable("Invalid Type::Class!");
6123 bool ASTContext::FunctionTypesMatchOnNSConsumedAttrs(
6124 const FunctionProtoType *FromFunctionType,
6125 const FunctionProtoType *ToFunctionType) {
6126 if (FromFunctionType->hasAnyConsumedArgs() !=
6127 ToFunctionType->hasAnyConsumedArgs())
6129 FunctionProtoType::ExtProtoInfo FromEPI =
6130 FromFunctionType->getExtProtoInfo();
6131 FunctionProtoType::ExtProtoInfo ToEPI =
6132 ToFunctionType->getExtProtoInfo();
6133 if (FromEPI.ConsumedArguments && ToEPI.ConsumedArguments)
6134 for (unsigned ArgIdx = 0, NumArgs = FromFunctionType->getNumArgs();
6135 ArgIdx != NumArgs; ++ArgIdx) {
6136 if (FromEPI.ConsumedArguments[ArgIdx] !=
6137 ToEPI.ConsumedArguments[ArgIdx])
6143 /// mergeObjCGCQualifiers - This routine merges ObjC's GC attribute of 'LHS' and
6144 /// 'RHS' attributes and returns the merged version; including for function
6146 QualType ASTContext::mergeObjCGCQualifiers(QualType LHS, QualType RHS) {
6147 QualType LHSCan = getCanonicalType(LHS),
6148 RHSCan = getCanonicalType(RHS);
6149 // If two types are identical, they are compatible.
6150 if (LHSCan == RHSCan)
6152 if (RHSCan->isFunctionType()) {
6153 if (!LHSCan->isFunctionType())
6155 QualType OldReturnType =
6156 cast<FunctionType>(RHSCan.getTypePtr())->getResultType();
6157 QualType NewReturnType =
6158 cast<FunctionType>(LHSCan.getTypePtr())->getResultType();
6159 QualType ResReturnType =
6160 mergeObjCGCQualifiers(NewReturnType, OldReturnType);
6161 if (ResReturnType.isNull())
6163 if (ResReturnType == NewReturnType || ResReturnType == OldReturnType) {
6164 // id foo(); ... __strong id foo(); or: __strong id foo(); ... id foo();
6165 // In either case, use OldReturnType to build the new function type.
6166 const FunctionType *F = LHS->getAs<FunctionType>();
6167 if (const FunctionProtoType *FPT = cast<FunctionProtoType>(F)) {
6168 FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo();
6169 EPI.ExtInfo = getFunctionExtInfo(LHS);
6171 = getFunctionType(OldReturnType, FPT->arg_type_begin(),
6172 FPT->getNumArgs(), EPI);
6179 // If the qualifiers are different, the types can still be merged.
6180 Qualifiers LQuals = LHSCan.getLocalQualifiers();
6181 Qualifiers RQuals = RHSCan.getLocalQualifiers();
6182 if (LQuals != RQuals) {
6183 // If any of these qualifiers are different, we have a type mismatch.
6184 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() ||
6185 LQuals.getAddressSpace() != RQuals.getAddressSpace())
6188 // Exactly one GC qualifier difference is allowed: __strong is
6189 // okay if the other type has no GC qualifier but is an Objective
6190 // C object pointer (i.e. implicitly strong by default). We fix
6191 // this by pretending that the unqualified type was actually
6192 // qualified __strong.
6193 Qualifiers::GC GC_L = LQuals.getObjCGCAttr();
6194 Qualifiers::GC GC_R = RQuals.getObjCGCAttr();
6195 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements");
6197 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak)
6200 if (GC_L == Qualifiers::Strong)
6202 if (GC_R == Qualifiers::Strong)
6207 if (LHSCan->isObjCObjectPointerType() && RHSCan->isObjCObjectPointerType()) {
6208 QualType LHSBaseQT = LHS->getAs<ObjCObjectPointerType>()->getPointeeType();
6209 QualType RHSBaseQT = RHS->getAs<ObjCObjectPointerType>()->getPointeeType();
6210 QualType ResQT = mergeObjCGCQualifiers(LHSBaseQT, RHSBaseQT);
6211 if (ResQT == LHSBaseQT)
6213 if (ResQT == RHSBaseQT)
6219 //===----------------------------------------------------------------------===//
6220 // Integer Predicates
6221 //===----------------------------------------------------------------------===//
6223 unsigned ASTContext::getIntWidth(QualType T) const {
6224 if (const EnumType *ET = dyn_cast<EnumType>(T))
6225 T = ET->getDecl()->getIntegerType();
6226 if (T->isBooleanType())
6228 // For builtin types, just use the standard type sizing method
6229 return (unsigned)getTypeSize(T);
6232 QualType ASTContext::getCorrespondingUnsignedType(QualType T) {
6233 assert(T->hasSignedIntegerRepresentation() && "Unexpected type");
6235 // Turn <4 x signed int> -> <4 x unsigned int>
6236 if (const VectorType *VTy = T->getAs<VectorType>())
6237 return getVectorType(getCorrespondingUnsignedType(VTy->getElementType()),
6238 VTy->getNumElements(), VTy->getVectorKind());
6240 // For enums, we return the unsigned version of the base type.
6241 if (const EnumType *ETy = T->getAs<EnumType>())
6242 T = ETy->getDecl()->getIntegerType();
6244 const BuiltinType *BTy = T->getAs<BuiltinType>();
6245 assert(BTy && "Unexpected signed integer type");
6246 switch (BTy->getKind()) {
6247 case BuiltinType::Char_S:
6248 case BuiltinType::SChar:
6249 return UnsignedCharTy;
6250 case BuiltinType::Short:
6251 return UnsignedShortTy;
6252 case BuiltinType::Int:
6253 return UnsignedIntTy;
6254 case BuiltinType::Long:
6255 return UnsignedLongTy;
6256 case BuiltinType::LongLong:
6257 return UnsignedLongLongTy;
6258 case BuiltinType::Int128:
6259 return UnsignedInt128Ty;
6261 llvm_unreachable("Unexpected signed integer type");
6265 ASTMutationListener::~ASTMutationListener() { }
6268 //===----------------------------------------------------------------------===//
6269 // Builtin Type Computation
6270 //===----------------------------------------------------------------------===//
6272 /// DecodeTypeFromStr - This decodes one type descriptor from Str, advancing the
6273 /// pointer over the consumed characters. This returns the resultant type. If
6274 /// AllowTypeModifiers is false then modifier like * are not parsed, just basic
6275 /// types. This allows "v2i*" to be parsed as a pointer to a v2i instead of
6276 /// a vector of "i*".
6278 /// RequiresICE is filled in on return to indicate whether the value is required
6279 /// to be an Integer Constant Expression.
6280 static QualType DecodeTypeFromStr(const char *&Str, const ASTContext &Context,
6281 ASTContext::GetBuiltinTypeError &Error,
6283 bool AllowTypeModifiers) {
6286 bool Signed = false, Unsigned = false;
6287 RequiresICE = false;
6289 // Read the prefixed modifiers first.
6293 default: Done = true; --Str; break;
6298 assert(!Unsigned && "Can't use both 'S' and 'U' modifiers!");
6299 assert(!Signed && "Can't use 'S' modifier multiple times!");
6303 assert(!Signed && "Can't use both 'S' and 'U' modifiers!");
6304 assert(!Unsigned && "Can't use 'S' modifier multiple times!");
6308 assert(HowLong <= 2 && "Can't have LLLL modifier");
6316 // Read the base type.
6318 default: llvm_unreachable("Unknown builtin type letter!");
6320 assert(HowLong == 0 && !Signed && !Unsigned &&
6321 "Bad modifiers used with 'v'!");
6322 Type = Context.VoidTy;
6325 assert(HowLong == 0 && !Signed && !Unsigned &&
6326 "Bad modifiers used with 'f'!");
6327 Type = Context.FloatTy;
6330 assert(HowLong < 2 && !Signed && !Unsigned &&
6331 "Bad modifiers used with 'd'!");
6333 Type = Context.LongDoubleTy;
6335 Type = Context.DoubleTy;
6338 assert(HowLong == 0 && "Bad modifiers used with 's'!");
6340 Type = Context.UnsignedShortTy;
6342 Type = Context.ShortTy;
6346 Type = Unsigned ? Context.UnsignedInt128Ty : Context.Int128Ty;
6347 else if (HowLong == 2)
6348 Type = Unsigned ? Context.UnsignedLongLongTy : Context.LongLongTy;
6349 else if (HowLong == 1)
6350 Type = Unsigned ? Context.UnsignedLongTy : Context.LongTy;
6352 Type = Unsigned ? Context.UnsignedIntTy : Context.IntTy;
6355 assert(HowLong == 0 && "Bad modifiers used with 'c'!");
6357 Type = Context.SignedCharTy;
6359 Type = Context.UnsignedCharTy;
6361 Type = Context.CharTy;
6363 case 'b': // boolean
6364 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'b'!");
6365 Type = Context.BoolTy;
6367 case 'z': // size_t.
6368 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'z'!");
6369 Type = Context.getSizeType();
6372 Type = Context.getCFConstantStringType();
6375 Type = Context.getObjCIdType();
6378 Type = Context.getObjCSelType();
6381 Type = Context.getBuiltinVaListType();
6382 assert(!Type.isNull() && "builtin va list type not initialized!");
6385 // This is a "reference" to a va_list; however, what exactly
6386 // this means depends on how va_list is defined. There are two
6387 // different kinds of va_list: ones passed by value, and ones
6388 // passed by reference. An example of a by-value va_list is
6389 // x86, where va_list is a char*. An example of by-ref va_list
6390 // is x86-64, where va_list is a __va_list_tag[1]. For x86,
6391 // we want this argument to be a char*&; for x86-64, we want
6392 // it to be a __va_list_tag*.
6393 Type = Context.getBuiltinVaListType();
6394 assert(!Type.isNull() && "builtin va list type not initialized!");
6395 if (Type->isArrayType())
6396 Type = Context.getArrayDecayedType(Type);
6398 Type = Context.getLValueReferenceType(Type);
6402 unsigned NumElements = strtoul(Str, &End, 10);
6403 assert(End != Str && "Missing vector size");
6406 QualType ElementType = DecodeTypeFromStr(Str, Context, Error,
6407 RequiresICE, false);
6408 assert(!RequiresICE && "Can't require vector ICE");
6410 // TODO: No way to make AltiVec vectors in builtins yet.
6411 Type = Context.getVectorType(ElementType, NumElements,
6412 VectorType::GenericVector);
6416 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, RequiresICE,
6418 assert(!RequiresICE && "Can't require complex ICE");
6419 Type = Context.getComplexType(ElementType);
6423 Type = Context.getPointerDiffType();
6427 Type = Context.getFILEType();
6428 if (Type.isNull()) {
6429 Error = ASTContext::GE_Missing_stdio;
6435 Type = Context.getsigjmp_bufType();
6437 Type = Context.getjmp_bufType();
6439 if (Type.isNull()) {
6440 Error = ASTContext::GE_Missing_setjmp;
6445 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'K'!");
6446 Type = Context.getucontext_tType();
6448 if (Type.isNull()) {
6449 Error = ASTContext::GE_Missing_ucontext;
6455 // If there are modifiers and if we're allowed to parse them, go for it.
6456 Done = !AllowTypeModifiers;
6458 switch (char c = *Str++) {
6459 default: Done = true; --Str; break;
6462 // Both pointers and references can have their pointee types
6463 // qualified with an address space.
6465 unsigned AddrSpace = strtoul(Str, &End, 10);
6466 if (End != Str && AddrSpace != 0) {
6467 Type = Context.getAddrSpaceQualType(Type, AddrSpace);
6471 Type = Context.getPointerType(Type);
6473 Type = Context.getLValueReferenceType(Type);
6476 // FIXME: There's no way to have a built-in with an rvalue ref arg.
6478 Type = Type.withConst();
6481 Type = Context.getVolatileType(Type);
6484 Type = Type.withRestrict();
6489 assert((!RequiresICE || Type->isIntegralOrEnumerationType()) &&
6490 "Integer constant 'I' type must be an integer");
6495 /// GetBuiltinType - Return the type for the specified builtin.
6496 QualType ASTContext::GetBuiltinType(unsigned Id,
6497 GetBuiltinTypeError &Error,
6498 unsigned *IntegerConstantArgs) const {
6499 const char *TypeStr = BuiltinInfo.GetTypeString(Id);
6501 SmallVector<QualType, 8> ArgTypes;
6503 bool RequiresICE = false;
6505 QualType ResType = DecodeTypeFromStr(TypeStr, *this, Error,
6507 if (Error != GE_None)
6510 assert(!RequiresICE && "Result of intrinsic cannot be required to be an ICE");
6512 while (TypeStr[0] && TypeStr[0] != '.') {
6513 QualType Ty = DecodeTypeFromStr(TypeStr, *this, Error, RequiresICE, true);
6514 if (Error != GE_None)
6517 // If this argument is required to be an IntegerConstantExpression and the
6518 // caller cares, fill in the bitmask we return.
6519 if (RequiresICE && IntegerConstantArgs)
6520 *IntegerConstantArgs |= 1 << ArgTypes.size();
6522 // Do array -> pointer decay. The builtin should use the decayed type.
6523 if (Ty->isArrayType())
6524 Ty = getArrayDecayedType(Ty);
6526 ArgTypes.push_back(Ty);
6529 assert((TypeStr[0] != '.' || TypeStr[1] == 0) &&
6530 "'.' should only occur at end of builtin type list!");
6532 FunctionType::ExtInfo EI;
6533 if (BuiltinInfo.isNoReturn(Id)) EI = EI.withNoReturn(true);
6535 bool Variadic = (TypeStr[0] == '.');
6537 // We really shouldn't be making a no-proto type here, especially in C++.
6538 if (ArgTypes.empty() && Variadic)
6539 return getFunctionNoProtoType(ResType, EI);
6541 FunctionProtoType::ExtProtoInfo EPI;
6543 EPI.Variadic = Variadic;
6545 return getFunctionType(ResType, ArgTypes.data(), ArgTypes.size(), EPI);
6548 GVALinkage ASTContext::GetGVALinkageForFunction(const FunctionDecl *FD) {
6549 GVALinkage External = GVA_StrongExternal;
6551 Linkage L = FD->getLinkage();
6554 case InternalLinkage:
6555 case UniqueExternalLinkage:
6556 return GVA_Internal;
6558 case ExternalLinkage:
6559 switch (FD->getTemplateSpecializationKind()) {
6560 case TSK_Undeclared:
6561 case TSK_ExplicitSpecialization:
6562 External = GVA_StrongExternal;
6565 case TSK_ExplicitInstantiationDefinition:
6566 return GVA_ExplicitTemplateInstantiation;
6568 case TSK_ExplicitInstantiationDeclaration:
6569 case TSK_ImplicitInstantiation:
6570 External = GVA_TemplateInstantiation;
6575 if (!FD->isInlined())
6578 if (!getLangOpts().CPlusPlus || FD->hasAttr<GNUInlineAttr>()) {
6579 // GNU or C99 inline semantics. Determine whether this symbol should be
6580 // externally visible.
6581 if (FD->isInlineDefinitionExternallyVisible())
6584 // C99 inline semantics, where the symbol is not externally visible.
6585 return GVA_C99Inline;
6588 // C++0x [temp.explicit]p9:
6589 // [ Note: The intent is that an inline function that is the subject of
6590 // an explicit instantiation declaration will still be implicitly
6591 // instantiated when used so that the body can be considered for
6592 // inlining, but that no out-of-line copy of the inline function would be
6593 // generated in the translation unit. -- end note ]
6594 if (FD->getTemplateSpecializationKind()
6595 == TSK_ExplicitInstantiationDeclaration)
6596 return GVA_C99Inline;
6598 return GVA_CXXInline;
6601 GVALinkage ASTContext::GetGVALinkageForVariable(const VarDecl *VD) {
6602 // If this is a static data member, compute the kind of template
6603 // specialization. Otherwise, this variable is not part of a
6605 TemplateSpecializationKind TSK = TSK_Undeclared;
6606 if (VD->isStaticDataMember())
6607 TSK = VD->getTemplateSpecializationKind();
6609 Linkage L = VD->getLinkage();
6610 if (L == ExternalLinkage && getLangOpts().CPlusPlus &&
6611 VD->getType()->getLinkage() == UniqueExternalLinkage)
6612 L = UniqueExternalLinkage;
6616 case InternalLinkage:
6617 case UniqueExternalLinkage:
6618 return GVA_Internal;
6620 case ExternalLinkage:
6622 case TSK_Undeclared:
6623 case TSK_ExplicitSpecialization:
6624 return GVA_StrongExternal;
6626 case TSK_ExplicitInstantiationDeclaration:
6627 llvm_unreachable("Variable should not be instantiated");
6628 // Fall through to treat this like any other instantiation.
6630 case TSK_ExplicitInstantiationDefinition:
6631 return GVA_ExplicitTemplateInstantiation;
6633 case TSK_ImplicitInstantiation:
6634 return GVA_TemplateInstantiation;
6638 llvm_unreachable("Invalid Linkage!");
6641 bool ASTContext::DeclMustBeEmitted(const Decl *D) {
6642 if (const VarDecl *VD = dyn_cast<VarDecl>(D)) {
6643 if (!VD->isFileVarDecl())
6645 } else if (!isa<FunctionDecl>(D))
6648 // Weak references don't produce any output by themselves.
6649 if (D->hasAttr<WeakRefAttr>())
6652 // Aliases and used decls are required.
6653 if (D->hasAttr<AliasAttr>() || D->hasAttr<UsedAttr>())
6656 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
6657 // Forward declarations aren't required.
6658 if (!FD->doesThisDeclarationHaveABody())
6659 return FD->doesDeclarationForceExternallyVisibleDefinition();
6661 // Constructors and destructors are required.
6662 if (FD->hasAttr<ConstructorAttr>() || FD->hasAttr<DestructorAttr>())
6665 // The key function for a class is required.
6666 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) {
6667 const CXXRecordDecl *RD = MD->getParent();
6668 if (MD->isOutOfLine() && RD->isDynamicClass()) {
6669 const CXXMethodDecl *KeyFunc = getKeyFunction(RD);
6670 if (KeyFunc && KeyFunc->getCanonicalDecl() == MD->getCanonicalDecl())
6675 GVALinkage Linkage = GetGVALinkageForFunction(FD);
6677 // static, static inline, always_inline, and extern inline functions can
6678 // always be deferred. Normal inline functions can be deferred in C99/C++.
6679 // Implicit template instantiations can also be deferred in C++.
6680 if (Linkage == GVA_Internal || Linkage == GVA_C99Inline ||
6681 Linkage == GVA_CXXInline || Linkage == GVA_TemplateInstantiation)
6686 const VarDecl *VD = cast<VarDecl>(D);
6687 assert(VD->isFileVarDecl() && "Expected file scoped var");
6689 if (VD->isThisDeclarationADefinition() == VarDecl::DeclarationOnly)
6692 // Structs that have non-trivial constructors or destructors are required.
6694 // FIXME: Handle references.
6695 // FIXME: Be more selective about which constructors we care about.
6696 if (const RecordType *RT = VD->getType()->getAs<RecordType>()) {
6697 if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(RT->getDecl())) {
6698 if (RD->hasDefinition() && !(RD->hasTrivialDefaultConstructor() &&
6699 RD->hasTrivialCopyConstructor() &&
6700 RD->hasTrivialMoveConstructor() &&
6701 RD->hasTrivialDestructor()))
6706 GVALinkage L = GetGVALinkageForVariable(VD);
6707 if (L == GVA_Internal || L == GVA_TemplateInstantiation) {
6708 if (!(VD->getInit() && VD->getInit()->HasSideEffects(*this)))
6715 CallingConv ASTContext::getDefaultMethodCallConv() {
6716 // Pass through to the C++ ABI object
6717 return ABI->getDefaultMethodCallConv();
6720 bool ASTContext::isNearlyEmpty(const CXXRecordDecl *RD) const {
6721 // Pass through to the C++ ABI object
6722 return ABI->isNearlyEmpty(RD);
6725 MangleContext *ASTContext::createMangleContext() {
6726 switch (Target->getCXXABI()) {
6728 case CXXABI_Itanium:
6729 return createItaniumMangleContext(*this, getDiagnostics());
6730 case CXXABI_Microsoft:
6731 return createMicrosoftMangleContext(*this, getDiagnostics());
6733 llvm_unreachable("Unsupported ABI");
6736 CXXABI::~CXXABI() {}
6738 size_t ASTContext::getSideTableAllocatedMemory() const {
6739 return ASTRecordLayouts.getMemorySize()
6740 + llvm::capacity_in_bytes(ObjCLayouts)
6741 + llvm::capacity_in_bytes(KeyFunctions)
6742 + llvm::capacity_in_bytes(ObjCImpls)
6743 + llvm::capacity_in_bytes(BlockVarCopyInits)
6744 + llvm::capacity_in_bytes(DeclAttrs)
6745 + llvm::capacity_in_bytes(InstantiatedFromStaticDataMember)
6746 + llvm::capacity_in_bytes(InstantiatedFromUsingDecl)
6747 + llvm::capacity_in_bytes(InstantiatedFromUsingShadowDecl)
6748 + llvm::capacity_in_bytes(InstantiatedFromUnnamedFieldDecl)
6749 + llvm::capacity_in_bytes(OverriddenMethods)
6750 + llvm::capacity_in_bytes(Types)
6751 + llvm::capacity_in_bytes(VariableArrayTypes)
6752 + llvm::capacity_in_bytes(ClassScopeSpecializationPattern);
6755 unsigned ASTContext::getLambdaManglingNumber(CXXMethodDecl *CallOperator) {
6756 CXXRecordDecl *Lambda = CallOperator->getParent();
6757 return LambdaMangleContexts[Lambda->getDeclContext()]
6758 .getManglingNumber(CallOperator);
6762 void ASTContext::setParameterIndex(const ParmVarDecl *D, unsigned int index) {
6763 ParamIndices[D] = index;
6766 unsigned ASTContext::getParameterIndex(const ParmVarDecl *D) const {
6767 ParameterIndexTable::const_iterator I = ParamIndices.find(D);
6768 assert(I != ParamIndices.end() &&
6769 "ParmIndices lacks entry set by ParmVarDecl");