ASTContext.cpp revision e289d81369914678db386f6aa86faf8f178e245d
1//===--- ASTContext.cpp - Context to hold long-lived AST nodes ------------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file implements the ASTContext interface. 11// 12//===----------------------------------------------------------------------===// 13 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" 34#include "CXXABI.h" 35#include <map> 36 37using namespace clang; 38 39unsigned ASTContext::NumImplicitDefaultConstructors; 40unsigned ASTContext::NumImplicitDefaultConstructorsDeclared; 41unsigned ASTContext::NumImplicitCopyConstructors; 42unsigned ASTContext::NumImplicitCopyConstructorsDeclared; 43unsigned ASTContext::NumImplicitMoveConstructors; 44unsigned ASTContext::NumImplicitMoveConstructorsDeclared; 45unsigned ASTContext::NumImplicitCopyAssignmentOperators; 46unsigned ASTContext::NumImplicitCopyAssignmentOperatorsDeclared; 47unsigned ASTContext::NumImplicitMoveAssignmentOperators; 48unsigned ASTContext::NumImplicitMoveAssignmentOperatorsDeclared; 49unsigned ASTContext::NumImplicitDestructors; 50unsigned ASTContext::NumImplicitDestructorsDeclared; 51 52enum FloatingRank { 53 FloatRank, DoubleRank, LongDoubleRank 54}; 55 56void 57ASTContext::CanonicalTemplateTemplateParm::Profile(llvm::FoldingSetNodeID &ID, 58 TemplateTemplateParmDecl *Parm) { 59 ID.AddInteger(Parm->getDepth()); 60 ID.AddInteger(Parm->getPosition()); 61 ID.AddBoolean(Parm->isParameterPack()); 62 63 TemplateParameterList *Params = Parm->getTemplateParameters(); 64 ID.AddInteger(Params->size()); 65 for (TemplateParameterList::const_iterator P = Params->begin(), 66 PEnd = Params->end(); 67 P != PEnd; ++P) { 68 if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*P)) { 69 ID.AddInteger(0); 70 ID.AddBoolean(TTP->isParameterPack()); 71 continue; 72 } 73 74 if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(*P)) { 75 ID.AddInteger(1); 76 ID.AddBoolean(NTTP->isParameterPack()); 77 ID.AddPointer(NTTP->getType().getAsOpaquePtr()); 78 if (NTTP->isExpandedParameterPack()) { 79 ID.AddBoolean(true); 80 ID.AddInteger(NTTP->getNumExpansionTypes()); 81 for (unsigned I = 0, N = NTTP->getNumExpansionTypes(); I != N; ++I) 82 ID.AddPointer(NTTP->getExpansionType(I).getAsOpaquePtr()); 83 } else 84 ID.AddBoolean(false); 85 continue; 86 } 87 88 TemplateTemplateParmDecl *TTP = cast<TemplateTemplateParmDecl>(*P); 89 ID.AddInteger(2); 90 Profile(ID, TTP); 91 } 92} 93 94TemplateTemplateParmDecl * 95ASTContext::getCanonicalTemplateTemplateParmDecl( 96 TemplateTemplateParmDecl *TTP) const { 97 // Check if we already have a canonical template template parameter. 98 llvm::FoldingSetNodeID ID; 99 CanonicalTemplateTemplateParm::Profile(ID, TTP); 100 void *InsertPos = 0; 101 CanonicalTemplateTemplateParm *Canonical 102 = CanonTemplateTemplateParms.FindNodeOrInsertPos(ID, InsertPos); 103 if (Canonical) 104 return Canonical->getParam(); 105 106 // Build a canonical template parameter list. 107 TemplateParameterList *Params = TTP->getTemplateParameters(); 108 SmallVector<NamedDecl *, 4> CanonParams; 109 CanonParams.reserve(Params->size()); 110 for (TemplateParameterList::const_iterator P = Params->begin(), 111 PEnd = Params->end(); 112 P != PEnd; ++P) { 113 if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*P)) 114 CanonParams.push_back( 115 TemplateTypeParmDecl::Create(*this, getTranslationUnitDecl(), 116 SourceLocation(), 117 SourceLocation(), 118 TTP->getDepth(), 119 TTP->getIndex(), 0, false, 120 TTP->isParameterPack())); 121 else if (NonTypeTemplateParmDecl *NTTP 122 = dyn_cast<NonTypeTemplateParmDecl>(*P)) { 123 QualType T = getCanonicalType(NTTP->getType()); 124 TypeSourceInfo *TInfo = getTrivialTypeSourceInfo(T); 125 NonTypeTemplateParmDecl *Param; 126 if (NTTP->isExpandedParameterPack()) { 127 SmallVector<QualType, 2> ExpandedTypes; 128 SmallVector<TypeSourceInfo *, 2> ExpandedTInfos; 129 for (unsigned I = 0, N = NTTP->getNumExpansionTypes(); I != N; ++I) { 130 ExpandedTypes.push_back(getCanonicalType(NTTP->getExpansionType(I))); 131 ExpandedTInfos.push_back( 132 getTrivialTypeSourceInfo(ExpandedTypes.back())); 133 } 134 135 Param = NonTypeTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 136 SourceLocation(), 137 SourceLocation(), 138 NTTP->getDepth(), 139 NTTP->getPosition(), 0, 140 T, 141 TInfo, 142 ExpandedTypes.data(), 143 ExpandedTypes.size(), 144 ExpandedTInfos.data()); 145 } else { 146 Param = NonTypeTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 147 SourceLocation(), 148 SourceLocation(), 149 NTTP->getDepth(), 150 NTTP->getPosition(), 0, 151 T, 152 NTTP->isParameterPack(), 153 TInfo); 154 } 155 CanonParams.push_back(Param); 156 157 } else 158 CanonParams.push_back(getCanonicalTemplateTemplateParmDecl( 159 cast<TemplateTemplateParmDecl>(*P))); 160 } 161 162 TemplateTemplateParmDecl *CanonTTP 163 = TemplateTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 164 SourceLocation(), TTP->getDepth(), 165 TTP->getPosition(), 166 TTP->isParameterPack(), 167 0, 168 TemplateParameterList::Create(*this, SourceLocation(), 169 SourceLocation(), 170 CanonParams.data(), 171 CanonParams.size(), 172 SourceLocation())); 173 174 // Get the new insert position for the node we care about. 175 Canonical = CanonTemplateTemplateParms.FindNodeOrInsertPos(ID, InsertPos); 176 assert(Canonical == 0 && "Shouldn't be in the map!"); 177 (void)Canonical; 178 179 // Create the canonical template template parameter entry. 180 Canonical = new (*this) CanonicalTemplateTemplateParm(CanonTTP); 181 CanonTemplateTemplateParms.InsertNode(Canonical, InsertPos); 182 return CanonTTP; 183} 184 185CXXABI *ASTContext::createCXXABI(const TargetInfo &T) { 186 if (!LangOpts.CPlusPlus) return 0; 187 188 switch (T.getCXXABI()) { 189 case CXXABI_ARM: 190 return CreateARMCXXABI(*this); 191 case CXXABI_Itanium: 192 return CreateItaniumCXXABI(*this); 193 case CXXABI_Microsoft: 194 return CreateMicrosoftCXXABI(*this); 195 } 196 return 0; 197} 198 199static const LangAS::Map *getAddressSpaceMap(const TargetInfo &T, 200 const LangOptions &LOpts) { 201 if (LOpts.FakeAddressSpaceMap) { 202 // The fake address space map must have a distinct entry for each 203 // language-specific address space. 204 static const unsigned FakeAddrSpaceMap[] = { 205 1, // opencl_global 206 2, // opencl_local 207 3 // opencl_constant 208 }; 209 return &FakeAddrSpaceMap; 210 } else { 211 return &T.getAddressSpaceMap(); 212 } 213} 214 215ASTContext::ASTContext(LangOptions& LOpts, SourceManager &SM, 216 const TargetInfo *t, 217 IdentifierTable &idents, SelectorTable &sels, 218 Builtin::Context &builtins, 219 unsigned size_reserve, 220 bool DelayInitialization) 221 : FunctionProtoTypes(this_()), 222 TemplateSpecializationTypes(this_()), 223 DependentTemplateSpecializationTypes(this_()), 224 SubstTemplateTemplateParmPacks(this_()), 225 GlobalNestedNameSpecifier(0), 226 Int128Decl(0), UInt128Decl(0), 227 ObjCIdDecl(0), ObjCSelDecl(0), ObjCClassDecl(0), 228 CFConstantStringTypeDecl(0), ObjCInstanceTypeDecl(0), 229 FILEDecl(0), 230 jmp_bufDecl(0), sigjmp_bufDecl(0), BlockDescriptorType(0), 231 BlockDescriptorExtendedType(0), cudaConfigureCallDecl(0), 232 NullTypeSourceInfo(QualType()), 233 SourceMgr(SM), LangOpts(LOpts), 234 AddrSpaceMap(0), Target(t), 235 Idents(idents), Selectors(sels), 236 BuiltinInfo(builtins), 237 DeclarationNames(*this), 238 ExternalSource(0), Listener(0), PrintingPolicy(LOpts), 239 LastSDM(0, 0), 240 UniqueBlockByRefTypeID(0) 241{ 242 if (size_reserve > 0) Types.reserve(size_reserve); 243 TUDecl = TranslationUnitDecl::Create(*this); 244 245 if (!DelayInitialization) { 246 assert(t && "No target supplied for ASTContext initialization"); 247 InitBuiltinTypes(*t); 248 } 249} 250 251ASTContext::~ASTContext() { 252 // Release the DenseMaps associated with DeclContext objects. 253 // FIXME: Is this the ideal solution? 254 ReleaseDeclContextMaps(); 255 256 // Call all of the deallocation functions. 257 for (unsigned I = 0, N = Deallocations.size(); I != N; ++I) 258 Deallocations[I].first(Deallocations[I].second); 259 260 // Release all of the memory associated with overridden C++ methods. 261 for (llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::iterator 262 OM = OverriddenMethods.begin(), OMEnd = OverriddenMethods.end(); 263 OM != OMEnd; ++OM) 264 OM->second.Destroy(); 265 266 // ASTRecordLayout objects in ASTRecordLayouts must always be destroyed 267 // because they can contain DenseMaps. 268 for (llvm::DenseMap<const ObjCContainerDecl*, 269 const ASTRecordLayout*>::iterator 270 I = ObjCLayouts.begin(), E = ObjCLayouts.end(); I != E; ) 271 // Increment in loop to prevent using deallocated memory. 272 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 273 R->Destroy(*this); 274 275 for (llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*>::iterator 276 I = ASTRecordLayouts.begin(), E = ASTRecordLayouts.end(); I != E; ) { 277 // Increment in loop to prevent using deallocated memory. 278 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 279 R->Destroy(*this); 280 } 281 282 for (llvm::DenseMap<const Decl*, AttrVec*>::iterator A = DeclAttrs.begin(), 283 AEnd = DeclAttrs.end(); 284 A != AEnd; ++A) 285 A->second->~AttrVec(); 286} 287 288void ASTContext::AddDeallocation(void (*Callback)(void*), void *Data) { 289 Deallocations.push_back(std::make_pair(Callback, Data)); 290} 291 292void 293ASTContext::setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source) { 294 ExternalSource.reset(Source.take()); 295} 296 297void ASTContext::PrintStats() const { 298 llvm::errs() << "\n*** AST Context Stats:\n"; 299 llvm::errs() << " " << Types.size() << " types total.\n"; 300 301 unsigned counts[] = { 302#define TYPE(Name, Parent) 0, 303#define ABSTRACT_TYPE(Name, Parent) 304#include "clang/AST/TypeNodes.def" 305 0 // Extra 306 }; 307 308 for (unsigned i = 0, e = Types.size(); i != e; ++i) { 309 Type *T = Types[i]; 310 counts[(unsigned)T->getTypeClass()]++; 311 } 312 313 unsigned Idx = 0; 314 unsigned TotalBytes = 0; 315#define TYPE(Name, Parent) \ 316 if (counts[Idx]) \ 317 llvm::errs() << " " << counts[Idx] << " " << #Name \ 318 << " types\n"; \ 319 TotalBytes += counts[Idx] * sizeof(Name##Type); \ 320 ++Idx; 321#define ABSTRACT_TYPE(Name, Parent) 322#include "clang/AST/TypeNodes.def" 323 324 llvm::errs() << "Total bytes = " << TotalBytes << "\n"; 325 326 // Implicit special member functions. 327 llvm::errs() << NumImplicitDefaultConstructorsDeclared << "/" 328 << NumImplicitDefaultConstructors 329 << " implicit default constructors created\n"; 330 llvm::errs() << NumImplicitCopyConstructorsDeclared << "/" 331 << NumImplicitCopyConstructors 332 << " implicit copy constructors created\n"; 333 if (getLangOptions().CPlusPlus) 334 llvm::errs() << NumImplicitMoveConstructorsDeclared << "/" 335 << NumImplicitMoveConstructors 336 << " implicit move constructors created\n"; 337 llvm::errs() << NumImplicitCopyAssignmentOperatorsDeclared << "/" 338 << NumImplicitCopyAssignmentOperators 339 << " implicit copy assignment operators created\n"; 340 if (getLangOptions().CPlusPlus) 341 llvm::errs() << NumImplicitMoveAssignmentOperatorsDeclared << "/" 342 << NumImplicitMoveAssignmentOperators 343 << " implicit move assignment operators created\n"; 344 llvm::errs() << NumImplicitDestructorsDeclared << "/" 345 << NumImplicitDestructors 346 << " implicit destructors created\n"; 347 348 if (ExternalSource.get()) { 349 llvm::errs() << "\n"; 350 ExternalSource->PrintStats(); 351 } 352 353 BumpAlloc.PrintStats(); 354} 355 356TypedefDecl *ASTContext::getInt128Decl() const { 357 if (!Int128Decl) { 358 TypeSourceInfo *TInfo = getTrivialTypeSourceInfo(Int128Ty); 359 Int128Decl = TypedefDecl::Create(const_cast<ASTContext &>(*this), 360 getTranslationUnitDecl(), 361 SourceLocation(), 362 SourceLocation(), 363 &Idents.get("__int128_t"), 364 TInfo); 365 } 366 367 return Int128Decl; 368} 369 370TypedefDecl *ASTContext::getUInt128Decl() const { 371 if (!UInt128Decl) { 372 TypeSourceInfo *TInfo = getTrivialTypeSourceInfo(UnsignedInt128Ty); 373 UInt128Decl = TypedefDecl::Create(const_cast<ASTContext &>(*this), 374 getTranslationUnitDecl(), 375 SourceLocation(), 376 SourceLocation(), 377 &Idents.get("__uint128_t"), 378 TInfo); 379 } 380 381 return UInt128Decl; 382} 383 384void ASTContext::InitBuiltinType(CanQualType &R, BuiltinType::Kind K) { 385 BuiltinType *Ty = new (*this, TypeAlignment) BuiltinType(K); 386 R = CanQualType::CreateUnsafe(QualType(Ty, 0)); 387 Types.push_back(Ty); 388} 389 390void ASTContext::InitBuiltinTypes(const TargetInfo &Target) { 391 assert((!this->Target || this->Target == &Target) && 392 "Incorrect target reinitialization"); 393 assert(VoidTy.isNull() && "Context reinitialized?"); 394 395 this->Target = &Target; 396 397 ABI.reset(createCXXABI(Target)); 398 AddrSpaceMap = getAddressSpaceMap(Target, LangOpts); 399 400 // C99 6.2.5p19. 401 InitBuiltinType(VoidTy, BuiltinType::Void); 402 403 // C99 6.2.5p2. 404 InitBuiltinType(BoolTy, BuiltinType::Bool); 405 // C99 6.2.5p3. 406 if (LangOpts.CharIsSigned) 407 InitBuiltinType(CharTy, BuiltinType::Char_S); 408 else 409 InitBuiltinType(CharTy, BuiltinType::Char_U); 410 // C99 6.2.5p4. 411 InitBuiltinType(SignedCharTy, BuiltinType::SChar); 412 InitBuiltinType(ShortTy, BuiltinType::Short); 413 InitBuiltinType(IntTy, BuiltinType::Int); 414 InitBuiltinType(LongTy, BuiltinType::Long); 415 InitBuiltinType(LongLongTy, BuiltinType::LongLong); 416 417 // C99 6.2.5p6. 418 InitBuiltinType(UnsignedCharTy, BuiltinType::UChar); 419 InitBuiltinType(UnsignedShortTy, BuiltinType::UShort); 420 InitBuiltinType(UnsignedIntTy, BuiltinType::UInt); 421 InitBuiltinType(UnsignedLongTy, BuiltinType::ULong); 422 InitBuiltinType(UnsignedLongLongTy, BuiltinType::ULongLong); 423 424 // C99 6.2.5p10. 425 InitBuiltinType(FloatTy, BuiltinType::Float); 426 InitBuiltinType(DoubleTy, BuiltinType::Double); 427 InitBuiltinType(LongDoubleTy, BuiltinType::LongDouble); 428 429 // GNU extension, 128-bit integers. 430 InitBuiltinType(Int128Ty, BuiltinType::Int128); 431 InitBuiltinType(UnsignedInt128Ty, BuiltinType::UInt128); 432 433 if (LangOpts.CPlusPlus) { // C++ 3.9.1p5 434 if (TargetInfo::isTypeSigned(Target.getWCharType())) 435 InitBuiltinType(WCharTy, BuiltinType::WChar_S); 436 else // -fshort-wchar makes wchar_t be unsigned. 437 InitBuiltinType(WCharTy, BuiltinType::WChar_U); 438 } else // C99 439 WCharTy = getFromTargetType(Target.getWCharType()); 440 441 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 442 InitBuiltinType(Char16Ty, BuiltinType::Char16); 443 else // C99 444 Char16Ty = getFromTargetType(Target.getChar16Type()); 445 446 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 447 InitBuiltinType(Char32Ty, BuiltinType::Char32); 448 else // C99 449 Char32Ty = getFromTargetType(Target.getChar32Type()); 450 451 // Placeholder type for type-dependent expressions whose type is 452 // completely unknown. No code should ever check a type against 453 // DependentTy and users should never see it; however, it is here to 454 // help diagnose failures to properly check for type-dependent 455 // expressions. 456 InitBuiltinType(DependentTy, BuiltinType::Dependent); 457 458 // Placeholder type for functions. 459 InitBuiltinType(OverloadTy, BuiltinType::Overload); 460 461 // Placeholder type for bound members. 462 InitBuiltinType(BoundMemberTy, BuiltinType::BoundMember); 463 464 // "any" type; useful for debugger-like clients. 465 InitBuiltinType(UnknownAnyTy, BuiltinType::UnknownAny); 466 467 // C99 6.2.5p11. 468 FloatComplexTy = getComplexType(FloatTy); 469 DoubleComplexTy = getComplexType(DoubleTy); 470 LongDoubleComplexTy = getComplexType(LongDoubleTy); 471 472 BuiltinVaListType = QualType(); 473 474 // Builtin types for 'id', 'Class', and 'SEL'. 475 InitBuiltinType(ObjCBuiltinIdTy, BuiltinType::ObjCId); 476 InitBuiltinType(ObjCBuiltinClassTy, BuiltinType::ObjCClass); 477 InitBuiltinType(ObjCBuiltinSelTy, BuiltinType::ObjCSel); 478 479 ObjCConstantStringType = QualType(); 480 481 // void * type 482 VoidPtrTy = getPointerType(VoidTy); 483 484 // nullptr type (C++0x 2.14.7) 485 InitBuiltinType(NullPtrTy, BuiltinType::NullPtr); 486} 487 488Diagnostic &ASTContext::getDiagnostics() const { 489 return SourceMgr.getDiagnostics(); 490} 491 492AttrVec& ASTContext::getDeclAttrs(const Decl *D) { 493 AttrVec *&Result = DeclAttrs[D]; 494 if (!Result) { 495 void *Mem = Allocate(sizeof(AttrVec)); 496 Result = new (Mem) AttrVec; 497 } 498 499 return *Result; 500} 501 502/// \brief Erase the attributes corresponding to the given declaration. 503void ASTContext::eraseDeclAttrs(const Decl *D) { 504 llvm::DenseMap<const Decl*, AttrVec*>::iterator Pos = DeclAttrs.find(D); 505 if (Pos != DeclAttrs.end()) { 506 Pos->second->~AttrVec(); 507 DeclAttrs.erase(Pos); 508 } 509} 510 511MemberSpecializationInfo * 512ASTContext::getInstantiatedFromStaticDataMember(const VarDecl *Var) { 513 assert(Var->isStaticDataMember() && "Not a static data member"); 514 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *>::iterator Pos 515 = InstantiatedFromStaticDataMember.find(Var); 516 if (Pos == InstantiatedFromStaticDataMember.end()) 517 return 0; 518 519 return Pos->second; 520} 521 522void 523ASTContext::setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 524 TemplateSpecializationKind TSK, 525 SourceLocation PointOfInstantiation) { 526 assert(Inst->isStaticDataMember() && "Not a static data member"); 527 assert(Tmpl->isStaticDataMember() && "Not a static data member"); 528 assert(!InstantiatedFromStaticDataMember[Inst] && 529 "Already noted what static data member was instantiated from"); 530 InstantiatedFromStaticDataMember[Inst] 531 = new (*this) MemberSpecializationInfo(Tmpl, TSK, PointOfInstantiation); 532} 533 534FunctionDecl *ASTContext::getClassScopeSpecializationPattern( 535 const FunctionDecl *FD){ 536 assert(FD && "Specialization is 0"); 537 llvm::DenseMap<const FunctionDecl*, FunctionDecl *>::const_iterator Pos 538 = ClassScopeSpecializationPattern.find(FD); 539 if (Pos == ClassScopeSpecializationPattern.end()) 540 return 0; 541 542 return Pos->second; 543} 544 545void ASTContext::setClassScopeSpecializationPattern(FunctionDecl *FD, 546 FunctionDecl *Pattern) { 547 assert(FD && "Specialization is 0"); 548 assert(Pattern && "Class scope specialization pattern is 0"); 549 ClassScopeSpecializationPattern[FD] = Pattern; 550} 551 552NamedDecl * 553ASTContext::getInstantiatedFromUsingDecl(UsingDecl *UUD) { 554 llvm::DenseMap<UsingDecl *, NamedDecl *>::const_iterator Pos 555 = InstantiatedFromUsingDecl.find(UUD); 556 if (Pos == InstantiatedFromUsingDecl.end()) 557 return 0; 558 559 return Pos->second; 560} 561 562void 563ASTContext::setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern) { 564 assert((isa<UsingDecl>(Pattern) || 565 isa<UnresolvedUsingValueDecl>(Pattern) || 566 isa<UnresolvedUsingTypenameDecl>(Pattern)) && 567 "pattern decl is not a using decl"); 568 assert(!InstantiatedFromUsingDecl[Inst] && "pattern already exists"); 569 InstantiatedFromUsingDecl[Inst] = Pattern; 570} 571 572UsingShadowDecl * 573ASTContext::getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst) { 574 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*>::const_iterator Pos 575 = InstantiatedFromUsingShadowDecl.find(Inst); 576 if (Pos == InstantiatedFromUsingShadowDecl.end()) 577 return 0; 578 579 return Pos->second; 580} 581 582void 583ASTContext::setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 584 UsingShadowDecl *Pattern) { 585 assert(!InstantiatedFromUsingShadowDecl[Inst] && "pattern already exists"); 586 InstantiatedFromUsingShadowDecl[Inst] = Pattern; 587} 588 589FieldDecl *ASTContext::getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field) { 590 llvm::DenseMap<FieldDecl *, FieldDecl *>::iterator Pos 591 = InstantiatedFromUnnamedFieldDecl.find(Field); 592 if (Pos == InstantiatedFromUnnamedFieldDecl.end()) 593 return 0; 594 595 return Pos->second; 596} 597 598void ASTContext::setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, 599 FieldDecl *Tmpl) { 600 assert(!Inst->getDeclName() && "Instantiated field decl is not unnamed"); 601 assert(!Tmpl->getDeclName() && "Template field decl is not unnamed"); 602 assert(!InstantiatedFromUnnamedFieldDecl[Inst] && 603 "Already noted what unnamed field was instantiated from"); 604 605 InstantiatedFromUnnamedFieldDecl[Inst] = Tmpl; 606} 607 608bool ASTContext::ZeroBitfieldFollowsNonBitfield(const FieldDecl *FD, 609 const FieldDecl *LastFD) const { 610 return (FD->isBitField() && LastFD && !LastFD->isBitField() && 611 FD->getBitWidth()->EvaluateAsInt(*this).getZExtValue() == 0); 612} 613 614bool ASTContext::ZeroBitfieldFollowsBitfield(const FieldDecl *FD, 615 const FieldDecl *LastFD) const { 616 return (FD->isBitField() && LastFD && LastFD->isBitField() && 617 FD->getBitWidth()->EvaluateAsInt(*this).getZExtValue() == 0 && 618 LastFD->getBitWidth()->EvaluateAsInt(*this).getZExtValue() != 0); 619} 620 621bool ASTContext::BitfieldFollowsBitfield(const FieldDecl *FD, 622 const FieldDecl *LastFD) const { 623 return (FD->isBitField() && LastFD && LastFD->isBitField() && 624 FD->getBitWidth()->EvaluateAsInt(*this).getZExtValue() && 625 LastFD->getBitWidth()->EvaluateAsInt(*this).getZExtValue()); 626} 627 628bool ASTContext::NonBitfieldFollowsBitfield(const FieldDecl *FD, 629 const FieldDecl *LastFD) const { 630 return (!FD->isBitField() && LastFD && LastFD->isBitField() && 631 LastFD->getBitWidth()->EvaluateAsInt(*this).getZExtValue()); 632} 633 634bool ASTContext::BitfieldFollowsNonBitfield(const FieldDecl *FD, 635 const FieldDecl *LastFD) const { 636 return (FD->isBitField() && LastFD && !LastFD->isBitField() && 637 FD->getBitWidth()->EvaluateAsInt(*this).getZExtValue()); 638} 639 640ASTContext::overridden_cxx_method_iterator 641ASTContext::overridden_methods_begin(const CXXMethodDecl *Method) const { 642 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 643 = OverriddenMethods.find(Method); 644 if (Pos == OverriddenMethods.end()) 645 return 0; 646 647 return Pos->second.begin(); 648} 649 650ASTContext::overridden_cxx_method_iterator 651ASTContext::overridden_methods_end(const CXXMethodDecl *Method) const { 652 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 653 = OverriddenMethods.find(Method); 654 if (Pos == OverriddenMethods.end()) 655 return 0; 656 657 return Pos->second.end(); 658} 659 660unsigned 661ASTContext::overridden_methods_size(const CXXMethodDecl *Method) const { 662 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 663 = OverriddenMethods.find(Method); 664 if (Pos == OverriddenMethods.end()) 665 return 0; 666 667 return Pos->second.size(); 668} 669 670void ASTContext::addOverriddenMethod(const CXXMethodDecl *Method, 671 const CXXMethodDecl *Overridden) { 672 OverriddenMethods[Method].push_back(Overridden); 673} 674 675//===----------------------------------------------------------------------===// 676// Type Sizing and Analysis 677//===----------------------------------------------------------------------===// 678 679/// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 680/// scalar floating point type. 681const llvm::fltSemantics &ASTContext::getFloatTypeSemantics(QualType T) const { 682 const BuiltinType *BT = T->getAs<BuiltinType>(); 683 assert(BT && "Not a floating point type!"); 684 switch (BT->getKind()) { 685 default: assert(0 && "Not a floating point type!"); 686 case BuiltinType::Float: return Target->getFloatFormat(); 687 case BuiltinType::Double: return Target->getDoubleFormat(); 688 case BuiltinType::LongDouble: return Target->getLongDoubleFormat(); 689 } 690} 691 692/// getDeclAlign - Return a conservative estimate of the alignment of the 693/// specified decl. Note that bitfields do not have a valid alignment, so 694/// this method will assert on them. 695/// If @p RefAsPointee, references are treated like their underlying type 696/// (for alignof), else they're treated like pointers (for CodeGen). 697CharUnits ASTContext::getDeclAlign(const Decl *D, bool RefAsPointee) const { 698 unsigned Align = Target->getCharWidth(); 699 700 bool UseAlignAttrOnly = false; 701 if (unsigned AlignFromAttr = D->getMaxAlignment()) { 702 Align = AlignFromAttr; 703 704 // __attribute__((aligned)) can increase or decrease alignment 705 // *except* on a struct or struct member, where it only increases 706 // alignment unless 'packed' is also specified. 707 // 708 // It is an error for [[align]] to decrease alignment, so we can 709 // ignore that possibility; Sema should diagnose it. 710 if (isa<FieldDecl>(D)) { 711 UseAlignAttrOnly = D->hasAttr<PackedAttr>() || 712 cast<FieldDecl>(D)->getParent()->hasAttr<PackedAttr>(); 713 } else { 714 UseAlignAttrOnly = true; 715 } 716 } 717 else if (isa<FieldDecl>(D)) 718 UseAlignAttrOnly = 719 D->hasAttr<PackedAttr>() || 720 cast<FieldDecl>(D)->getParent()->hasAttr<PackedAttr>(); 721 722 // If we're using the align attribute only, just ignore everything 723 // else about the declaration and its type. 724 if (UseAlignAttrOnly) { 725 // do nothing 726 727 } else if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) { 728 QualType T = VD->getType(); 729 if (const ReferenceType* RT = T->getAs<ReferenceType>()) { 730 if (RefAsPointee) 731 T = RT->getPointeeType(); 732 else 733 T = getPointerType(RT->getPointeeType()); 734 } 735 if (!T->isIncompleteType() && !T->isFunctionType()) { 736 // Adjust alignments of declarations with array type by the 737 // large-array alignment on the target. 738 unsigned MinWidth = Target->getLargeArrayMinWidth(); 739 const ArrayType *arrayType; 740 if (MinWidth && (arrayType = getAsArrayType(T))) { 741 if (isa<VariableArrayType>(arrayType)) 742 Align = std::max(Align, Target->getLargeArrayAlign()); 743 else if (isa<ConstantArrayType>(arrayType) && 744 MinWidth <= getTypeSize(cast<ConstantArrayType>(arrayType))) 745 Align = std::max(Align, Target->getLargeArrayAlign()); 746 747 // Walk through any array types while we're at it. 748 T = getBaseElementType(arrayType); 749 } 750 Align = std::max(Align, getPreferredTypeAlign(T.getTypePtr())); 751 } 752 753 // Fields can be subject to extra alignment constraints, like if 754 // the field is packed, the struct is packed, or the struct has a 755 // a max-field-alignment constraint (#pragma pack). So calculate 756 // the actual alignment of the field within the struct, and then 757 // (as we're expected to) constrain that by the alignment of the type. 758 if (const FieldDecl *field = dyn_cast<FieldDecl>(VD)) { 759 // So calculate the alignment of the field. 760 const ASTRecordLayout &layout = getASTRecordLayout(field->getParent()); 761 762 // Start with the record's overall alignment. 763 unsigned fieldAlign = toBits(layout.getAlignment()); 764 765 // Use the GCD of that and the offset within the record. 766 uint64_t offset = layout.getFieldOffset(field->getFieldIndex()); 767 if (offset > 0) { 768 // Alignment is always a power of 2, so the GCD will be a power of 2, 769 // which means we get to do this crazy thing instead of Euclid's. 770 uint64_t lowBitOfOffset = offset & (~offset + 1); 771 if (lowBitOfOffset < fieldAlign) 772 fieldAlign = static_cast<unsigned>(lowBitOfOffset); 773 } 774 775 Align = std::min(Align, fieldAlign); 776 } 777 } 778 779 return toCharUnitsFromBits(Align); 780} 781 782std::pair<CharUnits, CharUnits> 783ASTContext::getTypeInfoInChars(const Type *T) const { 784 std::pair<uint64_t, unsigned> Info = getTypeInfo(T); 785 return std::make_pair(toCharUnitsFromBits(Info.first), 786 toCharUnitsFromBits(Info.second)); 787} 788 789std::pair<CharUnits, CharUnits> 790ASTContext::getTypeInfoInChars(QualType T) const { 791 return getTypeInfoInChars(T.getTypePtr()); 792} 793 794/// getTypeSize - Return the size of the specified type, in bits. This method 795/// does not work on incomplete types. 796/// 797/// FIXME: Pointers into different addr spaces could have different sizes and 798/// alignment requirements: getPointerInfo should take an AddrSpace, this 799/// should take a QualType, &c. 800std::pair<uint64_t, unsigned> 801ASTContext::getTypeInfo(const Type *T) const { 802 uint64_t Width=0; 803 unsigned Align=8; 804 switch (T->getTypeClass()) { 805#define TYPE(Class, Base) 806#define ABSTRACT_TYPE(Class, Base) 807#define NON_CANONICAL_TYPE(Class, Base) 808#define DEPENDENT_TYPE(Class, Base) case Type::Class: 809#include "clang/AST/TypeNodes.def" 810 llvm_unreachable("Should not see dependent types"); 811 break; 812 813 case Type::FunctionNoProto: 814 case Type::FunctionProto: 815 // GCC extension: alignof(function) = 32 bits 816 Width = 0; 817 Align = 32; 818 break; 819 820 case Type::IncompleteArray: 821 case Type::VariableArray: 822 Width = 0; 823 Align = getTypeAlign(cast<ArrayType>(T)->getElementType()); 824 break; 825 826 case Type::ConstantArray: { 827 const ConstantArrayType *CAT = cast<ConstantArrayType>(T); 828 829 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(CAT->getElementType()); 830 Width = EltInfo.first*CAT->getSize().getZExtValue(); 831 Align = EltInfo.second; 832 Width = llvm::RoundUpToAlignment(Width, Align); 833 break; 834 } 835 case Type::ExtVector: 836 case Type::Vector: { 837 const VectorType *VT = cast<VectorType>(T); 838 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(VT->getElementType()); 839 Width = EltInfo.first*VT->getNumElements(); 840 Align = Width; 841 // If the alignment is not a power of 2, round up to the next power of 2. 842 // This happens for non-power-of-2 length vectors. 843 if (Align & (Align-1)) { 844 Align = llvm::NextPowerOf2(Align); 845 Width = llvm::RoundUpToAlignment(Width, Align); 846 } 847 break; 848 } 849 850 case Type::Builtin: 851 switch (cast<BuiltinType>(T)->getKind()) { 852 default: assert(0 && "Unknown builtin type!"); 853 case BuiltinType::Void: 854 // GCC extension: alignof(void) = 8 bits. 855 Width = 0; 856 Align = 8; 857 break; 858 859 case BuiltinType::Bool: 860 Width = Target->getBoolWidth(); 861 Align = Target->getBoolAlign(); 862 break; 863 case BuiltinType::Char_S: 864 case BuiltinType::Char_U: 865 case BuiltinType::UChar: 866 case BuiltinType::SChar: 867 Width = Target->getCharWidth(); 868 Align = Target->getCharAlign(); 869 break; 870 case BuiltinType::WChar_S: 871 case BuiltinType::WChar_U: 872 Width = Target->getWCharWidth(); 873 Align = Target->getWCharAlign(); 874 break; 875 case BuiltinType::Char16: 876 Width = Target->getChar16Width(); 877 Align = Target->getChar16Align(); 878 break; 879 case BuiltinType::Char32: 880 Width = Target->getChar32Width(); 881 Align = Target->getChar32Align(); 882 break; 883 case BuiltinType::UShort: 884 case BuiltinType::Short: 885 Width = Target->getShortWidth(); 886 Align = Target->getShortAlign(); 887 break; 888 case BuiltinType::UInt: 889 case BuiltinType::Int: 890 Width = Target->getIntWidth(); 891 Align = Target->getIntAlign(); 892 break; 893 case BuiltinType::ULong: 894 case BuiltinType::Long: 895 Width = Target->getLongWidth(); 896 Align = Target->getLongAlign(); 897 break; 898 case BuiltinType::ULongLong: 899 case BuiltinType::LongLong: 900 Width = Target->getLongLongWidth(); 901 Align = Target->getLongLongAlign(); 902 break; 903 case BuiltinType::Int128: 904 case BuiltinType::UInt128: 905 Width = 128; 906 Align = 128; // int128_t is 128-bit aligned on all targets. 907 break; 908 case BuiltinType::Float: 909 Width = Target->getFloatWidth(); 910 Align = Target->getFloatAlign(); 911 break; 912 case BuiltinType::Double: 913 Width = Target->getDoubleWidth(); 914 Align = Target->getDoubleAlign(); 915 break; 916 case BuiltinType::LongDouble: 917 Width = Target->getLongDoubleWidth(); 918 Align = Target->getLongDoubleAlign(); 919 break; 920 case BuiltinType::NullPtr: 921 Width = Target->getPointerWidth(0); // C++ 3.9.1p11: sizeof(nullptr_t) 922 Align = Target->getPointerAlign(0); // == sizeof(void*) 923 break; 924 case BuiltinType::ObjCId: 925 case BuiltinType::ObjCClass: 926 case BuiltinType::ObjCSel: 927 Width = Target->getPointerWidth(0); 928 Align = Target->getPointerAlign(0); 929 break; 930 } 931 break; 932 case Type::ObjCObjectPointer: 933 Width = Target->getPointerWidth(0); 934 Align = Target->getPointerAlign(0); 935 break; 936 case Type::BlockPointer: { 937 unsigned AS = getTargetAddressSpace( 938 cast<BlockPointerType>(T)->getPointeeType()); 939 Width = Target->getPointerWidth(AS); 940 Align = Target->getPointerAlign(AS); 941 break; 942 } 943 case Type::LValueReference: 944 case Type::RValueReference: { 945 // alignof and sizeof should never enter this code path here, so we go 946 // the pointer route. 947 unsigned AS = getTargetAddressSpace( 948 cast<ReferenceType>(T)->getPointeeType()); 949 Width = Target->getPointerWidth(AS); 950 Align = Target->getPointerAlign(AS); 951 break; 952 } 953 case Type::Pointer: { 954 unsigned AS = getTargetAddressSpace(cast<PointerType>(T)->getPointeeType()); 955 Width = Target->getPointerWidth(AS); 956 Align = Target->getPointerAlign(AS); 957 break; 958 } 959 case Type::MemberPointer: { 960 const MemberPointerType *MPT = cast<MemberPointerType>(T); 961 std::pair<uint64_t, unsigned> PtrDiffInfo = 962 getTypeInfo(getPointerDiffType()); 963 Width = PtrDiffInfo.first * ABI->getMemberPointerSize(MPT); 964 Align = PtrDiffInfo.second; 965 break; 966 } 967 case Type::Complex: { 968 // Complex types have the same alignment as their elements, but twice the 969 // size. 970 std::pair<uint64_t, unsigned> EltInfo = 971 getTypeInfo(cast<ComplexType>(T)->getElementType()); 972 Width = EltInfo.first*2; 973 Align = EltInfo.second; 974 break; 975 } 976 case Type::ObjCObject: 977 return getTypeInfo(cast<ObjCObjectType>(T)->getBaseType().getTypePtr()); 978 case Type::ObjCInterface: { 979 const ObjCInterfaceType *ObjCI = cast<ObjCInterfaceType>(T); 980 const ASTRecordLayout &Layout = getASTObjCInterfaceLayout(ObjCI->getDecl()); 981 Width = toBits(Layout.getSize()); 982 Align = toBits(Layout.getAlignment()); 983 break; 984 } 985 case Type::Record: 986 case Type::Enum: { 987 const TagType *TT = cast<TagType>(T); 988 989 if (TT->getDecl()->isInvalidDecl()) { 990 Width = 8; 991 Align = 8; 992 break; 993 } 994 995 if (const EnumType *ET = dyn_cast<EnumType>(TT)) 996 return getTypeInfo(ET->getDecl()->getIntegerType()); 997 998 const RecordType *RT = cast<RecordType>(TT); 999 const ASTRecordLayout &Layout = getASTRecordLayout(RT->getDecl()); 1000 Width = toBits(Layout.getSize()); 1001 Align = toBits(Layout.getAlignment()); 1002 break; 1003 } 1004 1005 case Type::SubstTemplateTypeParm: 1006 return getTypeInfo(cast<SubstTemplateTypeParmType>(T)-> 1007 getReplacementType().getTypePtr()); 1008 1009 case Type::Auto: { 1010 const AutoType *A = cast<AutoType>(T); 1011 assert(A->isDeduced() && "Cannot request the size of a dependent type"); 1012 return getTypeInfo(A->getDeducedType().getTypePtr()); 1013 } 1014 1015 case Type::Paren: 1016 return getTypeInfo(cast<ParenType>(T)->getInnerType().getTypePtr()); 1017 1018 case Type::Typedef: { 1019 const TypedefNameDecl *Typedef = cast<TypedefType>(T)->getDecl(); 1020 std::pair<uint64_t, unsigned> Info 1021 = getTypeInfo(Typedef->getUnderlyingType().getTypePtr()); 1022 // If the typedef has an aligned attribute on it, it overrides any computed 1023 // alignment we have. This violates the GCC documentation (which says that 1024 // attribute(aligned) can only round up) but matches its implementation. 1025 if (unsigned AttrAlign = Typedef->getMaxAlignment()) 1026 Align = AttrAlign; 1027 else 1028 Align = Info.second; 1029 Width = Info.first; 1030 break; 1031 } 1032 1033 case Type::TypeOfExpr: 1034 return getTypeInfo(cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType() 1035 .getTypePtr()); 1036 1037 case Type::TypeOf: 1038 return getTypeInfo(cast<TypeOfType>(T)->getUnderlyingType().getTypePtr()); 1039 1040 case Type::Decltype: 1041 return getTypeInfo(cast<DecltypeType>(T)->getUnderlyingExpr()->getType() 1042 .getTypePtr()); 1043 1044 case Type::UnaryTransform: 1045 return getTypeInfo(cast<UnaryTransformType>(T)->getUnderlyingType()); 1046 1047 case Type::Elaborated: 1048 return getTypeInfo(cast<ElaboratedType>(T)->getNamedType().getTypePtr()); 1049 1050 case Type::Attributed: 1051 return getTypeInfo( 1052 cast<AttributedType>(T)->getEquivalentType().getTypePtr()); 1053 1054 case Type::TemplateSpecialization: { 1055 assert(getCanonicalType(T) != T && 1056 "Cannot request the size of a dependent type"); 1057 const TemplateSpecializationType *TST = cast<TemplateSpecializationType>(T); 1058 // A type alias template specialization may refer to a typedef with the 1059 // aligned attribute on it. 1060 if (TST->isTypeAlias()) 1061 return getTypeInfo(TST->getAliasedType().getTypePtr()); 1062 else 1063 return getTypeInfo(getCanonicalType(T)); 1064 } 1065 1066 } 1067 1068 assert(Align && (Align & (Align-1)) == 0 && "Alignment must be power of 2"); 1069 return std::make_pair(Width, Align); 1070} 1071 1072/// toCharUnitsFromBits - Convert a size in bits to a size in characters. 1073CharUnits ASTContext::toCharUnitsFromBits(int64_t BitSize) const { 1074 return CharUnits::fromQuantity(BitSize / getCharWidth()); 1075} 1076 1077/// toBits - Convert a size in characters to a size in characters. 1078int64_t ASTContext::toBits(CharUnits CharSize) const { 1079 return CharSize.getQuantity() * getCharWidth(); 1080} 1081 1082/// getTypeSizeInChars - Return the size of the specified type, in characters. 1083/// This method does not work on incomplete types. 1084CharUnits ASTContext::getTypeSizeInChars(QualType T) const { 1085 return toCharUnitsFromBits(getTypeSize(T)); 1086} 1087CharUnits ASTContext::getTypeSizeInChars(const Type *T) const { 1088 return toCharUnitsFromBits(getTypeSize(T)); 1089} 1090 1091/// getTypeAlignInChars - Return the ABI-specified alignment of a type, in 1092/// characters. This method does not work on incomplete types. 1093CharUnits ASTContext::getTypeAlignInChars(QualType T) const { 1094 return toCharUnitsFromBits(getTypeAlign(T)); 1095} 1096CharUnits ASTContext::getTypeAlignInChars(const Type *T) const { 1097 return toCharUnitsFromBits(getTypeAlign(T)); 1098} 1099 1100/// getPreferredTypeAlign - Return the "preferred" alignment of the specified 1101/// type for the current target in bits. This can be different than the ABI 1102/// alignment in cases where it is beneficial for performance to overalign 1103/// a data type. 1104unsigned ASTContext::getPreferredTypeAlign(const Type *T) const { 1105 unsigned ABIAlign = getTypeAlign(T); 1106 1107 // Double and long long should be naturally aligned if possible. 1108 if (const ComplexType* CT = T->getAs<ComplexType>()) 1109 T = CT->getElementType().getTypePtr(); 1110 if (T->isSpecificBuiltinType(BuiltinType::Double) || 1111 T->isSpecificBuiltinType(BuiltinType::LongLong)) 1112 return std::max(ABIAlign, (unsigned)getTypeSize(T)); 1113 1114 return ABIAlign; 1115} 1116 1117/// DeepCollectObjCIvars - 1118/// This routine first collects all declared, but not synthesized, ivars in 1119/// super class and then collects all ivars, including those synthesized for 1120/// current class. This routine is used for implementation of current class 1121/// when all ivars, declared and synthesized are known. 1122/// 1123void ASTContext::DeepCollectObjCIvars(const ObjCInterfaceDecl *OI, 1124 bool leafClass, 1125 SmallVectorImpl<const ObjCIvarDecl*> &Ivars) const { 1126 if (const ObjCInterfaceDecl *SuperClass = OI->getSuperClass()) 1127 DeepCollectObjCIvars(SuperClass, false, Ivars); 1128 if (!leafClass) { 1129 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 1130 E = OI->ivar_end(); I != E; ++I) 1131 Ivars.push_back(*I); 1132 } else { 1133 ObjCInterfaceDecl *IDecl = const_cast<ObjCInterfaceDecl *>(OI); 1134 for (const ObjCIvarDecl *Iv = IDecl->all_declared_ivar_begin(); Iv; 1135 Iv= Iv->getNextIvar()) 1136 Ivars.push_back(Iv); 1137 } 1138} 1139 1140/// CollectInheritedProtocols - Collect all protocols in current class and 1141/// those inherited by it. 1142void ASTContext::CollectInheritedProtocols(const Decl *CDecl, 1143 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols) { 1144 if (const ObjCInterfaceDecl *OI = dyn_cast<ObjCInterfaceDecl>(CDecl)) { 1145 // We can use protocol_iterator here instead of 1146 // all_referenced_protocol_iterator since we are walking all categories. 1147 for (ObjCInterfaceDecl::all_protocol_iterator P = OI->all_referenced_protocol_begin(), 1148 PE = OI->all_referenced_protocol_end(); P != PE; ++P) { 1149 ObjCProtocolDecl *Proto = (*P); 1150 Protocols.insert(Proto); 1151 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1152 PE = Proto->protocol_end(); P != PE; ++P) { 1153 Protocols.insert(*P); 1154 CollectInheritedProtocols(*P, Protocols); 1155 } 1156 } 1157 1158 // Categories of this Interface. 1159 for (const ObjCCategoryDecl *CDeclChain = OI->getCategoryList(); 1160 CDeclChain; CDeclChain = CDeclChain->getNextClassCategory()) 1161 CollectInheritedProtocols(CDeclChain, Protocols); 1162 if (ObjCInterfaceDecl *SD = OI->getSuperClass()) 1163 while (SD) { 1164 CollectInheritedProtocols(SD, Protocols); 1165 SD = SD->getSuperClass(); 1166 } 1167 } else if (const ObjCCategoryDecl *OC = dyn_cast<ObjCCategoryDecl>(CDecl)) { 1168 for (ObjCCategoryDecl::protocol_iterator P = OC->protocol_begin(), 1169 PE = OC->protocol_end(); P != PE; ++P) { 1170 ObjCProtocolDecl *Proto = (*P); 1171 Protocols.insert(Proto); 1172 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1173 PE = Proto->protocol_end(); P != PE; ++P) 1174 CollectInheritedProtocols(*P, Protocols); 1175 } 1176 } else if (const ObjCProtocolDecl *OP = dyn_cast<ObjCProtocolDecl>(CDecl)) { 1177 for (ObjCProtocolDecl::protocol_iterator P = OP->protocol_begin(), 1178 PE = OP->protocol_end(); P != PE; ++P) { 1179 ObjCProtocolDecl *Proto = (*P); 1180 Protocols.insert(Proto); 1181 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1182 PE = Proto->protocol_end(); P != PE; ++P) 1183 CollectInheritedProtocols(*P, Protocols); 1184 } 1185 } 1186} 1187 1188unsigned ASTContext::CountNonClassIvars(const ObjCInterfaceDecl *OI) const { 1189 unsigned count = 0; 1190 // Count ivars declared in class extension. 1191 for (const ObjCCategoryDecl *CDecl = OI->getFirstClassExtension(); CDecl; 1192 CDecl = CDecl->getNextClassExtension()) 1193 count += CDecl->ivar_size(); 1194 1195 // Count ivar defined in this class's implementation. This 1196 // includes synthesized ivars. 1197 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) 1198 count += ImplDecl->ivar_size(); 1199 1200 return count; 1201} 1202 1203/// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 1204ObjCImplementationDecl *ASTContext::getObjCImplementation(ObjCInterfaceDecl *D) { 1205 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 1206 I = ObjCImpls.find(D); 1207 if (I != ObjCImpls.end()) 1208 return cast<ObjCImplementationDecl>(I->second); 1209 return 0; 1210} 1211/// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 1212ObjCCategoryImplDecl *ASTContext::getObjCImplementation(ObjCCategoryDecl *D) { 1213 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 1214 I = ObjCImpls.find(D); 1215 if (I != ObjCImpls.end()) 1216 return cast<ObjCCategoryImplDecl>(I->second); 1217 return 0; 1218} 1219 1220/// \brief Set the implementation of ObjCInterfaceDecl. 1221void ASTContext::setObjCImplementation(ObjCInterfaceDecl *IFaceD, 1222 ObjCImplementationDecl *ImplD) { 1223 assert(IFaceD && ImplD && "Passed null params"); 1224 ObjCImpls[IFaceD] = ImplD; 1225} 1226/// \brief Set the implementation of ObjCCategoryDecl. 1227void ASTContext::setObjCImplementation(ObjCCategoryDecl *CatD, 1228 ObjCCategoryImplDecl *ImplD) { 1229 assert(CatD && ImplD && "Passed null params"); 1230 ObjCImpls[CatD] = ImplD; 1231} 1232 1233/// \brief Get the copy initialization expression of VarDecl,or NULL if 1234/// none exists. 1235Expr *ASTContext::getBlockVarCopyInits(const VarDecl*VD) { 1236 assert(VD && "Passed null params"); 1237 assert(VD->hasAttr<BlocksAttr>() && 1238 "getBlockVarCopyInits - not __block var"); 1239 llvm::DenseMap<const VarDecl*, Expr*>::iterator 1240 I = BlockVarCopyInits.find(VD); 1241 return (I != BlockVarCopyInits.end()) ? cast<Expr>(I->second) : 0; 1242} 1243 1244/// \brief Set the copy inialization expression of a block var decl. 1245void ASTContext::setBlockVarCopyInits(VarDecl*VD, Expr* Init) { 1246 assert(VD && Init && "Passed null params"); 1247 assert(VD->hasAttr<BlocksAttr>() && 1248 "setBlockVarCopyInits - not __block var"); 1249 BlockVarCopyInits[VD] = Init; 1250} 1251 1252/// \brief Allocate an uninitialized TypeSourceInfo. 1253/// 1254/// The caller should initialize the memory held by TypeSourceInfo using 1255/// the TypeLoc wrappers. 1256/// 1257/// \param T the type that will be the basis for type source info. This type 1258/// should refer to how the declarator was written in source code, not to 1259/// what type semantic analysis resolved the declarator to. 1260TypeSourceInfo *ASTContext::CreateTypeSourceInfo(QualType T, 1261 unsigned DataSize) const { 1262 if (!DataSize) 1263 DataSize = TypeLoc::getFullDataSizeForType(T); 1264 else 1265 assert(DataSize == TypeLoc::getFullDataSizeForType(T) && 1266 "incorrect data size provided to CreateTypeSourceInfo!"); 1267 1268 TypeSourceInfo *TInfo = 1269 (TypeSourceInfo*)BumpAlloc.Allocate(sizeof(TypeSourceInfo) + DataSize, 8); 1270 new (TInfo) TypeSourceInfo(T); 1271 return TInfo; 1272} 1273 1274TypeSourceInfo *ASTContext::getTrivialTypeSourceInfo(QualType T, 1275 SourceLocation L) const { 1276 TypeSourceInfo *DI = CreateTypeSourceInfo(T); 1277 DI->getTypeLoc().initialize(const_cast<ASTContext &>(*this), L); 1278 return DI; 1279} 1280 1281const ASTRecordLayout & 1282ASTContext::getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) const { 1283 return getObjCLayout(D, 0); 1284} 1285 1286const ASTRecordLayout & 1287ASTContext::getASTObjCImplementationLayout( 1288 const ObjCImplementationDecl *D) const { 1289 return getObjCLayout(D->getClassInterface(), D); 1290} 1291 1292//===----------------------------------------------------------------------===// 1293// Type creation/memoization methods 1294//===----------------------------------------------------------------------===// 1295 1296QualType 1297ASTContext::getExtQualType(const Type *baseType, Qualifiers quals) const { 1298 unsigned fastQuals = quals.getFastQualifiers(); 1299 quals.removeFastQualifiers(); 1300 1301 // Check if we've already instantiated this type. 1302 llvm::FoldingSetNodeID ID; 1303 ExtQuals::Profile(ID, baseType, quals); 1304 void *insertPos = 0; 1305 if (ExtQuals *eq = ExtQualNodes.FindNodeOrInsertPos(ID, insertPos)) { 1306 assert(eq->getQualifiers() == quals); 1307 return QualType(eq, fastQuals); 1308 } 1309 1310 // If the base type is not canonical, make the appropriate canonical type. 1311 QualType canon; 1312 if (!baseType->isCanonicalUnqualified()) { 1313 SplitQualType canonSplit = baseType->getCanonicalTypeInternal().split(); 1314 canonSplit.second.addConsistentQualifiers(quals); 1315 canon = getExtQualType(canonSplit.first, canonSplit.second); 1316 1317 // Re-find the insert position. 1318 (void) ExtQualNodes.FindNodeOrInsertPos(ID, insertPos); 1319 } 1320 1321 ExtQuals *eq = new (*this, TypeAlignment) ExtQuals(baseType, canon, quals); 1322 ExtQualNodes.InsertNode(eq, insertPos); 1323 return QualType(eq, fastQuals); 1324} 1325 1326QualType 1327ASTContext::getAddrSpaceQualType(QualType T, unsigned AddressSpace) const { 1328 QualType CanT = getCanonicalType(T); 1329 if (CanT.getAddressSpace() == AddressSpace) 1330 return T; 1331 1332 // If we are composing extended qualifiers together, merge together 1333 // into one ExtQuals node. 1334 QualifierCollector Quals; 1335 const Type *TypeNode = Quals.strip(T); 1336 1337 // If this type already has an address space specified, it cannot get 1338 // another one. 1339 assert(!Quals.hasAddressSpace() && 1340 "Type cannot be in multiple addr spaces!"); 1341 Quals.addAddressSpace(AddressSpace); 1342 1343 return getExtQualType(TypeNode, Quals); 1344} 1345 1346QualType ASTContext::getObjCGCQualType(QualType T, 1347 Qualifiers::GC GCAttr) const { 1348 QualType CanT = getCanonicalType(T); 1349 if (CanT.getObjCGCAttr() == GCAttr) 1350 return T; 1351 1352 if (const PointerType *ptr = T->getAs<PointerType>()) { 1353 QualType Pointee = ptr->getPointeeType(); 1354 if (Pointee->isAnyPointerType()) { 1355 QualType ResultType = getObjCGCQualType(Pointee, GCAttr); 1356 return getPointerType(ResultType); 1357 } 1358 } 1359 1360 // If we are composing extended qualifiers together, merge together 1361 // into one ExtQuals node. 1362 QualifierCollector Quals; 1363 const Type *TypeNode = Quals.strip(T); 1364 1365 // If this type already has an ObjCGC specified, it cannot get 1366 // another one. 1367 assert(!Quals.hasObjCGCAttr() && 1368 "Type cannot have multiple ObjCGCs!"); 1369 Quals.addObjCGCAttr(GCAttr); 1370 1371 return getExtQualType(TypeNode, Quals); 1372} 1373 1374const FunctionType *ASTContext::adjustFunctionType(const FunctionType *T, 1375 FunctionType::ExtInfo Info) { 1376 if (T->getExtInfo() == Info) 1377 return T; 1378 1379 QualType Result; 1380 if (const FunctionNoProtoType *FNPT = dyn_cast<FunctionNoProtoType>(T)) { 1381 Result = getFunctionNoProtoType(FNPT->getResultType(), Info); 1382 } else { 1383 const FunctionProtoType *FPT = cast<FunctionProtoType>(T); 1384 FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); 1385 EPI.ExtInfo = Info; 1386 Result = getFunctionType(FPT->getResultType(), FPT->arg_type_begin(), 1387 FPT->getNumArgs(), EPI); 1388 } 1389 1390 return cast<FunctionType>(Result.getTypePtr()); 1391} 1392 1393/// getComplexType - Return the uniqued reference to the type for a complex 1394/// number with the specified element type. 1395QualType ASTContext::getComplexType(QualType T) const { 1396 // Unique pointers, to guarantee there is only one pointer of a particular 1397 // structure. 1398 llvm::FoldingSetNodeID ID; 1399 ComplexType::Profile(ID, T); 1400 1401 void *InsertPos = 0; 1402 if (ComplexType *CT = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos)) 1403 return QualType(CT, 0); 1404 1405 // If the pointee type isn't canonical, this won't be a canonical type either, 1406 // so fill in the canonical type field. 1407 QualType Canonical; 1408 if (!T.isCanonical()) { 1409 Canonical = getComplexType(getCanonicalType(T)); 1410 1411 // Get the new insert position for the node we care about. 1412 ComplexType *NewIP = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos); 1413 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1414 } 1415 ComplexType *New = new (*this, TypeAlignment) ComplexType(T, Canonical); 1416 Types.push_back(New); 1417 ComplexTypes.InsertNode(New, InsertPos); 1418 return QualType(New, 0); 1419} 1420 1421/// getPointerType - Return the uniqued reference to the type for a pointer to 1422/// the specified type. 1423QualType ASTContext::getPointerType(QualType T) const { 1424 // Unique pointers, to guarantee there is only one pointer of a particular 1425 // structure. 1426 llvm::FoldingSetNodeID ID; 1427 PointerType::Profile(ID, T); 1428 1429 void *InsertPos = 0; 1430 if (PointerType *PT = PointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1431 return QualType(PT, 0); 1432 1433 // If the pointee type isn't canonical, this won't be a canonical type either, 1434 // so fill in the canonical type field. 1435 QualType Canonical; 1436 if (!T.isCanonical()) { 1437 Canonical = getPointerType(getCanonicalType(T)); 1438 1439 // Get the new insert position for the node we care about. 1440 PointerType *NewIP = PointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1441 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1442 } 1443 PointerType *New = new (*this, TypeAlignment) PointerType(T, Canonical); 1444 Types.push_back(New); 1445 PointerTypes.InsertNode(New, InsertPos); 1446 return QualType(New, 0); 1447} 1448 1449/// getBlockPointerType - Return the uniqued reference to the type for 1450/// a pointer to the specified block. 1451QualType ASTContext::getBlockPointerType(QualType T) const { 1452 assert(T->isFunctionType() && "block of function types only"); 1453 // Unique pointers, to guarantee there is only one block of a particular 1454 // structure. 1455 llvm::FoldingSetNodeID ID; 1456 BlockPointerType::Profile(ID, T); 1457 1458 void *InsertPos = 0; 1459 if (BlockPointerType *PT = 1460 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1461 return QualType(PT, 0); 1462 1463 // If the block pointee type isn't canonical, this won't be a canonical 1464 // type either so fill in the canonical type field. 1465 QualType Canonical; 1466 if (!T.isCanonical()) { 1467 Canonical = getBlockPointerType(getCanonicalType(T)); 1468 1469 // Get the new insert position for the node we care about. 1470 BlockPointerType *NewIP = 1471 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1472 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1473 } 1474 BlockPointerType *New 1475 = new (*this, TypeAlignment) BlockPointerType(T, Canonical); 1476 Types.push_back(New); 1477 BlockPointerTypes.InsertNode(New, InsertPos); 1478 return QualType(New, 0); 1479} 1480 1481/// getLValueReferenceType - Return the uniqued reference to the type for an 1482/// lvalue reference to the specified type. 1483QualType 1484ASTContext::getLValueReferenceType(QualType T, bool SpelledAsLValue) const { 1485 assert(getCanonicalType(T) != OverloadTy && 1486 "Unresolved overloaded function type"); 1487 1488 // Unique pointers, to guarantee there is only one pointer of a particular 1489 // structure. 1490 llvm::FoldingSetNodeID ID; 1491 ReferenceType::Profile(ID, T, SpelledAsLValue); 1492 1493 void *InsertPos = 0; 1494 if (LValueReferenceType *RT = 1495 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1496 return QualType(RT, 0); 1497 1498 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1499 1500 // If the referencee type isn't canonical, this won't be a canonical type 1501 // either, so fill in the canonical type field. 1502 QualType Canonical; 1503 if (!SpelledAsLValue || InnerRef || !T.isCanonical()) { 1504 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1505 Canonical = getLValueReferenceType(getCanonicalType(PointeeType)); 1506 1507 // Get the new insert position for the node we care about. 1508 LValueReferenceType *NewIP = 1509 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1510 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1511 } 1512 1513 LValueReferenceType *New 1514 = new (*this, TypeAlignment) LValueReferenceType(T, Canonical, 1515 SpelledAsLValue); 1516 Types.push_back(New); 1517 LValueReferenceTypes.InsertNode(New, InsertPos); 1518 1519 return QualType(New, 0); 1520} 1521 1522/// getRValueReferenceType - Return the uniqued reference to the type for an 1523/// rvalue reference to the specified type. 1524QualType ASTContext::getRValueReferenceType(QualType T) const { 1525 // Unique pointers, to guarantee there is only one pointer of a particular 1526 // structure. 1527 llvm::FoldingSetNodeID ID; 1528 ReferenceType::Profile(ID, T, false); 1529 1530 void *InsertPos = 0; 1531 if (RValueReferenceType *RT = 1532 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1533 return QualType(RT, 0); 1534 1535 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1536 1537 // If the referencee type isn't canonical, this won't be a canonical type 1538 // either, so fill in the canonical type field. 1539 QualType Canonical; 1540 if (InnerRef || !T.isCanonical()) { 1541 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1542 Canonical = getRValueReferenceType(getCanonicalType(PointeeType)); 1543 1544 // Get the new insert position for the node we care about. 1545 RValueReferenceType *NewIP = 1546 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1547 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1548 } 1549 1550 RValueReferenceType *New 1551 = new (*this, TypeAlignment) RValueReferenceType(T, Canonical); 1552 Types.push_back(New); 1553 RValueReferenceTypes.InsertNode(New, InsertPos); 1554 return QualType(New, 0); 1555} 1556 1557/// getMemberPointerType - Return the uniqued reference to the type for a 1558/// member pointer to the specified type, in the specified class. 1559QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls) const { 1560 // Unique pointers, to guarantee there is only one pointer of a particular 1561 // structure. 1562 llvm::FoldingSetNodeID ID; 1563 MemberPointerType::Profile(ID, T, Cls); 1564 1565 void *InsertPos = 0; 1566 if (MemberPointerType *PT = 1567 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1568 return QualType(PT, 0); 1569 1570 // If the pointee or class type isn't canonical, this won't be a canonical 1571 // type either, so fill in the canonical type field. 1572 QualType Canonical; 1573 if (!T.isCanonical() || !Cls->isCanonicalUnqualified()) { 1574 Canonical = getMemberPointerType(getCanonicalType(T),getCanonicalType(Cls)); 1575 1576 // Get the new insert position for the node we care about. 1577 MemberPointerType *NewIP = 1578 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1579 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1580 } 1581 MemberPointerType *New 1582 = new (*this, TypeAlignment) MemberPointerType(T, Cls, Canonical); 1583 Types.push_back(New); 1584 MemberPointerTypes.InsertNode(New, InsertPos); 1585 return QualType(New, 0); 1586} 1587 1588/// getConstantArrayType - Return the unique reference to the type for an 1589/// array of the specified element type. 1590QualType ASTContext::getConstantArrayType(QualType EltTy, 1591 const llvm::APInt &ArySizeIn, 1592 ArrayType::ArraySizeModifier ASM, 1593 unsigned IndexTypeQuals) const { 1594 assert((EltTy->isDependentType() || 1595 EltTy->isIncompleteType() || EltTy->isConstantSizeType()) && 1596 "Constant array of VLAs is illegal!"); 1597 1598 // Convert the array size into a canonical width matching the pointer size for 1599 // the target. 1600 llvm::APInt ArySize(ArySizeIn); 1601 ArySize = 1602 ArySize.zextOrTrunc(Target->getPointerWidth(getTargetAddressSpace(EltTy))); 1603 1604 llvm::FoldingSetNodeID ID; 1605 ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, IndexTypeQuals); 1606 1607 void *InsertPos = 0; 1608 if (ConstantArrayType *ATP = 1609 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1610 return QualType(ATP, 0); 1611 1612 // If the element type isn't canonical or has qualifiers, this won't 1613 // be a canonical type either, so fill in the canonical type field. 1614 QualType Canon; 1615 if (!EltTy.isCanonical() || EltTy.hasLocalQualifiers()) { 1616 SplitQualType canonSplit = getCanonicalType(EltTy).split(); 1617 Canon = getConstantArrayType(QualType(canonSplit.first, 0), ArySize, 1618 ASM, IndexTypeQuals); 1619 Canon = getQualifiedType(Canon, canonSplit.second); 1620 1621 // Get the new insert position for the node we care about. 1622 ConstantArrayType *NewIP = 1623 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1624 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1625 } 1626 1627 ConstantArrayType *New = new(*this,TypeAlignment) 1628 ConstantArrayType(EltTy, Canon, ArySize, ASM, IndexTypeQuals); 1629 ConstantArrayTypes.InsertNode(New, InsertPos); 1630 Types.push_back(New); 1631 return QualType(New, 0); 1632} 1633 1634/// getVariableArrayDecayedType - Turns the given type, which may be 1635/// variably-modified, into the corresponding type with all the known 1636/// sizes replaced with [*]. 1637QualType ASTContext::getVariableArrayDecayedType(QualType type) const { 1638 // Vastly most common case. 1639 if (!type->isVariablyModifiedType()) return type; 1640 1641 QualType result; 1642 1643 SplitQualType split = type.getSplitDesugaredType(); 1644 const Type *ty = split.first; 1645 switch (ty->getTypeClass()) { 1646#define TYPE(Class, Base) 1647#define ABSTRACT_TYPE(Class, Base) 1648#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 1649#include "clang/AST/TypeNodes.def" 1650 llvm_unreachable("didn't desugar past all non-canonical types?"); 1651 1652 // These types should never be variably-modified. 1653 case Type::Builtin: 1654 case Type::Complex: 1655 case Type::Vector: 1656 case Type::ExtVector: 1657 case Type::DependentSizedExtVector: 1658 case Type::ObjCObject: 1659 case Type::ObjCInterface: 1660 case Type::ObjCObjectPointer: 1661 case Type::Record: 1662 case Type::Enum: 1663 case Type::UnresolvedUsing: 1664 case Type::TypeOfExpr: 1665 case Type::TypeOf: 1666 case Type::Decltype: 1667 case Type::UnaryTransform: 1668 case Type::DependentName: 1669 case Type::InjectedClassName: 1670 case Type::TemplateSpecialization: 1671 case Type::DependentTemplateSpecialization: 1672 case Type::TemplateTypeParm: 1673 case Type::SubstTemplateTypeParmPack: 1674 case Type::Auto: 1675 case Type::PackExpansion: 1676 llvm_unreachable("type should never be variably-modified"); 1677 1678 // These types can be variably-modified but should never need to 1679 // further decay. 1680 case Type::FunctionNoProto: 1681 case Type::FunctionProto: 1682 case Type::BlockPointer: 1683 case Type::MemberPointer: 1684 return type; 1685 1686 // These types can be variably-modified. All these modifications 1687 // preserve structure except as noted by comments. 1688 // TODO: if we ever care about optimizing VLAs, there are no-op 1689 // optimizations available here. 1690 case Type::Pointer: 1691 result = getPointerType(getVariableArrayDecayedType( 1692 cast<PointerType>(ty)->getPointeeType())); 1693 break; 1694 1695 case Type::LValueReference: { 1696 const LValueReferenceType *lv = cast<LValueReferenceType>(ty); 1697 result = getLValueReferenceType( 1698 getVariableArrayDecayedType(lv->getPointeeType()), 1699 lv->isSpelledAsLValue()); 1700 break; 1701 } 1702 1703 case Type::RValueReference: { 1704 const RValueReferenceType *lv = cast<RValueReferenceType>(ty); 1705 result = getRValueReferenceType( 1706 getVariableArrayDecayedType(lv->getPointeeType())); 1707 break; 1708 } 1709 1710 case Type::ConstantArray: { 1711 const ConstantArrayType *cat = cast<ConstantArrayType>(ty); 1712 result = getConstantArrayType( 1713 getVariableArrayDecayedType(cat->getElementType()), 1714 cat->getSize(), 1715 cat->getSizeModifier(), 1716 cat->getIndexTypeCVRQualifiers()); 1717 break; 1718 } 1719 1720 case Type::DependentSizedArray: { 1721 const DependentSizedArrayType *dat = cast<DependentSizedArrayType>(ty); 1722 result = getDependentSizedArrayType( 1723 getVariableArrayDecayedType(dat->getElementType()), 1724 dat->getSizeExpr(), 1725 dat->getSizeModifier(), 1726 dat->getIndexTypeCVRQualifiers(), 1727 dat->getBracketsRange()); 1728 break; 1729 } 1730 1731 // Turn incomplete types into [*] types. 1732 case Type::IncompleteArray: { 1733 const IncompleteArrayType *iat = cast<IncompleteArrayType>(ty); 1734 result = getVariableArrayType( 1735 getVariableArrayDecayedType(iat->getElementType()), 1736 /*size*/ 0, 1737 ArrayType::Normal, 1738 iat->getIndexTypeCVRQualifiers(), 1739 SourceRange()); 1740 break; 1741 } 1742 1743 // Turn VLA types into [*] types. 1744 case Type::VariableArray: { 1745 const VariableArrayType *vat = cast<VariableArrayType>(ty); 1746 result = getVariableArrayType( 1747 getVariableArrayDecayedType(vat->getElementType()), 1748 /*size*/ 0, 1749 ArrayType::Star, 1750 vat->getIndexTypeCVRQualifiers(), 1751 vat->getBracketsRange()); 1752 break; 1753 } 1754 } 1755 1756 // Apply the top-level qualifiers from the original. 1757 return getQualifiedType(result, split.second); 1758} 1759 1760/// getVariableArrayType - Returns a non-unique reference to the type for a 1761/// variable array of the specified element type. 1762QualType ASTContext::getVariableArrayType(QualType EltTy, 1763 Expr *NumElts, 1764 ArrayType::ArraySizeModifier ASM, 1765 unsigned IndexTypeQuals, 1766 SourceRange Brackets) const { 1767 // Since we don't unique expressions, it isn't possible to unique VLA's 1768 // that have an expression provided for their size. 1769 QualType Canon; 1770 1771 // Be sure to pull qualifiers off the element type. 1772 if (!EltTy.isCanonical() || EltTy.hasLocalQualifiers()) { 1773 SplitQualType canonSplit = getCanonicalType(EltTy).split(); 1774 Canon = getVariableArrayType(QualType(canonSplit.first, 0), NumElts, ASM, 1775 IndexTypeQuals, Brackets); 1776 Canon = getQualifiedType(Canon, canonSplit.second); 1777 } 1778 1779 VariableArrayType *New = new(*this, TypeAlignment) 1780 VariableArrayType(EltTy, Canon, NumElts, ASM, IndexTypeQuals, Brackets); 1781 1782 VariableArrayTypes.push_back(New); 1783 Types.push_back(New); 1784 return QualType(New, 0); 1785} 1786 1787/// getDependentSizedArrayType - Returns a non-unique reference to 1788/// the type for a dependently-sized array of the specified element 1789/// type. 1790QualType ASTContext::getDependentSizedArrayType(QualType elementType, 1791 Expr *numElements, 1792 ArrayType::ArraySizeModifier ASM, 1793 unsigned elementTypeQuals, 1794 SourceRange brackets) const { 1795 assert((!numElements || numElements->isTypeDependent() || 1796 numElements->isValueDependent()) && 1797 "Size must be type- or value-dependent!"); 1798 1799 // Dependently-sized array types that do not have a specified number 1800 // of elements will have their sizes deduced from a dependent 1801 // initializer. We do no canonicalization here at all, which is okay 1802 // because they can't be used in most locations. 1803 if (!numElements) { 1804 DependentSizedArrayType *newType 1805 = new (*this, TypeAlignment) 1806 DependentSizedArrayType(*this, elementType, QualType(), 1807 numElements, ASM, elementTypeQuals, 1808 brackets); 1809 Types.push_back(newType); 1810 return QualType(newType, 0); 1811 } 1812 1813 // Otherwise, we actually build a new type every time, but we 1814 // also build a canonical type. 1815 1816 SplitQualType canonElementType = getCanonicalType(elementType).split(); 1817 1818 void *insertPos = 0; 1819 llvm::FoldingSetNodeID ID; 1820 DependentSizedArrayType::Profile(ID, *this, 1821 QualType(canonElementType.first, 0), 1822 ASM, elementTypeQuals, numElements); 1823 1824 // Look for an existing type with these properties. 1825 DependentSizedArrayType *canonTy = 1826 DependentSizedArrayTypes.FindNodeOrInsertPos(ID, insertPos); 1827 1828 // If we don't have one, build one. 1829 if (!canonTy) { 1830 canonTy = new (*this, TypeAlignment) 1831 DependentSizedArrayType(*this, QualType(canonElementType.first, 0), 1832 QualType(), numElements, ASM, elementTypeQuals, 1833 brackets); 1834 DependentSizedArrayTypes.InsertNode(canonTy, insertPos); 1835 Types.push_back(canonTy); 1836 } 1837 1838 // Apply qualifiers from the element type to the array. 1839 QualType canon = getQualifiedType(QualType(canonTy,0), 1840 canonElementType.second); 1841 1842 // If we didn't need extra canonicalization for the element type, 1843 // then just use that as our result. 1844 if (QualType(canonElementType.first, 0) == elementType) 1845 return canon; 1846 1847 // Otherwise, we need to build a type which follows the spelling 1848 // of the element type. 1849 DependentSizedArrayType *sugaredType 1850 = new (*this, TypeAlignment) 1851 DependentSizedArrayType(*this, elementType, canon, numElements, 1852 ASM, elementTypeQuals, brackets); 1853 Types.push_back(sugaredType); 1854 return QualType(sugaredType, 0); 1855} 1856 1857QualType ASTContext::getIncompleteArrayType(QualType elementType, 1858 ArrayType::ArraySizeModifier ASM, 1859 unsigned elementTypeQuals) const { 1860 llvm::FoldingSetNodeID ID; 1861 IncompleteArrayType::Profile(ID, elementType, ASM, elementTypeQuals); 1862 1863 void *insertPos = 0; 1864 if (IncompleteArrayType *iat = 1865 IncompleteArrayTypes.FindNodeOrInsertPos(ID, insertPos)) 1866 return QualType(iat, 0); 1867 1868 // If the element type isn't canonical, this won't be a canonical type 1869 // either, so fill in the canonical type field. We also have to pull 1870 // qualifiers off the element type. 1871 QualType canon; 1872 1873 if (!elementType.isCanonical() || elementType.hasLocalQualifiers()) { 1874 SplitQualType canonSplit = getCanonicalType(elementType).split(); 1875 canon = getIncompleteArrayType(QualType(canonSplit.first, 0), 1876 ASM, elementTypeQuals); 1877 canon = getQualifiedType(canon, canonSplit.second); 1878 1879 // Get the new insert position for the node we care about. 1880 IncompleteArrayType *existing = 1881 IncompleteArrayTypes.FindNodeOrInsertPos(ID, insertPos); 1882 assert(!existing && "Shouldn't be in the map!"); (void) existing; 1883 } 1884 1885 IncompleteArrayType *newType = new (*this, TypeAlignment) 1886 IncompleteArrayType(elementType, canon, ASM, elementTypeQuals); 1887 1888 IncompleteArrayTypes.InsertNode(newType, insertPos); 1889 Types.push_back(newType); 1890 return QualType(newType, 0); 1891} 1892 1893/// getVectorType - Return the unique reference to a vector type of 1894/// the specified element type and size. VectorType must be a built-in type. 1895QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts, 1896 VectorType::VectorKind VecKind) const { 1897 assert(vecType->isBuiltinType()); 1898 1899 // Check if we've already instantiated a vector of this type. 1900 llvm::FoldingSetNodeID ID; 1901 VectorType::Profile(ID, vecType, NumElts, Type::Vector, VecKind); 1902 1903 void *InsertPos = 0; 1904 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1905 return QualType(VTP, 0); 1906 1907 // If the element type isn't canonical, this won't be a canonical type either, 1908 // so fill in the canonical type field. 1909 QualType Canonical; 1910 if (!vecType.isCanonical()) { 1911 Canonical = getVectorType(getCanonicalType(vecType), NumElts, VecKind); 1912 1913 // Get the new insert position for the node we care about. 1914 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1915 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1916 } 1917 VectorType *New = new (*this, TypeAlignment) 1918 VectorType(vecType, NumElts, Canonical, VecKind); 1919 VectorTypes.InsertNode(New, InsertPos); 1920 Types.push_back(New); 1921 return QualType(New, 0); 1922} 1923 1924/// getExtVectorType - Return the unique reference to an extended vector type of 1925/// the specified element type and size. VectorType must be a built-in type. 1926QualType 1927ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) const { 1928 assert(vecType->isBuiltinType() || vecType->isDependentType()); 1929 1930 // Check if we've already instantiated a vector of this type. 1931 llvm::FoldingSetNodeID ID; 1932 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector, 1933 VectorType::GenericVector); 1934 void *InsertPos = 0; 1935 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1936 return QualType(VTP, 0); 1937 1938 // If the element type isn't canonical, this won't be a canonical type either, 1939 // so fill in the canonical type field. 1940 QualType Canonical; 1941 if (!vecType.isCanonical()) { 1942 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts); 1943 1944 // Get the new insert position for the node we care about. 1945 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1946 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1947 } 1948 ExtVectorType *New = new (*this, TypeAlignment) 1949 ExtVectorType(vecType, NumElts, Canonical); 1950 VectorTypes.InsertNode(New, InsertPos); 1951 Types.push_back(New); 1952 return QualType(New, 0); 1953} 1954 1955QualType 1956ASTContext::getDependentSizedExtVectorType(QualType vecType, 1957 Expr *SizeExpr, 1958 SourceLocation AttrLoc) const { 1959 llvm::FoldingSetNodeID ID; 1960 DependentSizedExtVectorType::Profile(ID, *this, getCanonicalType(vecType), 1961 SizeExpr); 1962 1963 void *InsertPos = 0; 1964 DependentSizedExtVectorType *Canon 1965 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1966 DependentSizedExtVectorType *New; 1967 if (Canon) { 1968 // We already have a canonical version of this array type; use it as 1969 // the canonical type for a newly-built type. 1970 New = new (*this, TypeAlignment) 1971 DependentSizedExtVectorType(*this, vecType, QualType(Canon, 0), 1972 SizeExpr, AttrLoc); 1973 } else { 1974 QualType CanonVecTy = getCanonicalType(vecType); 1975 if (CanonVecTy == vecType) { 1976 New = new (*this, TypeAlignment) 1977 DependentSizedExtVectorType(*this, vecType, QualType(), SizeExpr, 1978 AttrLoc); 1979 1980 DependentSizedExtVectorType *CanonCheck 1981 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1982 assert(!CanonCheck && "Dependent-sized ext_vector canonical type broken"); 1983 (void)CanonCheck; 1984 DependentSizedExtVectorTypes.InsertNode(New, InsertPos); 1985 } else { 1986 QualType Canon = getDependentSizedExtVectorType(CanonVecTy, SizeExpr, 1987 SourceLocation()); 1988 New = new (*this, TypeAlignment) 1989 DependentSizedExtVectorType(*this, vecType, Canon, SizeExpr, AttrLoc); 1990 } 1991 } 1992 1993 Types.push_back(New); 1994 return QualType(New, 0); 1995} 1996 1997/// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 1998/// 1999QualType 2000ASTContext::getFunctionNoProtoType(QualType ResultTy, 2001 const FunctionType::ExtInfo &Info) const { 2002 const CallingConv DefaultCC = Info.getCC(); 2003 const CallingConv CallConv = (LangOpts.MRTD && DefaultCC == CC_Default) ? 2004 CC_X86StdCall : DefaultCC; 2005 // Unique functions, to guarantee there is only one function of a particular 2006 // structure. 2007 llvm::FoldingSetNodeID ID; 2008 FunctionNoProtoType::Profile(ID, ResultTy, Info); 2009 2010 void *InsertPos = 0; 2011 if (FunctionNoProtoType *FT = 2012 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 2013 return QualType(FT, 0); 2014 2015 QualType Canonical; 2016 if (!ResultTy.isCanonical() || 2017 getCanonicalCallConv(CallConv) != CallConv) { 2018 Canonical = 2019 getFunctionNoProtoType(getCanonicalType(ResultTy), 2020 Info.withCallingConv(getCanonicalCallConv(CallConv))); 2021 2022 // Get the new insert position for the node we care about. 2023 FunctionNoProtoType *NewIP = 2024 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 2025 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 2026 } 2027 2028 FunctionProtoType::ExtInfo newInfo = Info.withCallingConv(CallConv); 2029 FunctionNoProtoType *New = new (*this, TypeAlignment) 2030 FunctionNoProtoType(ResultTy, Canonical, newInfo); 2031 Types.push_back(New); 2032 FunctionNoProtoTypes.InsertNode(New, InsertPos); 2033 return QualType(New, 0); 2034} 2035 2036/// getFunctionType - Return a normal function type with a typed argument 2037/// list. isVariadic indicates whether the argument list includes '...'. 2038QualType 2039ASTContext::getFunctionType(QualType ResultTy, 2040 const QualType *ArgArray, unsigned NumArgs, 2041 const FunctionProtoType::ExtProtoInfo &EPI) const { 2042 // Unique functions, to guarantee there is only one function of a particular 2043 // structure. 2044 llvm::FoldingSetNodeID ID; 2045 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, EPI, *this); 2046 2047 void *InsertPos = 0; 2048 if (FunctionProtoType *FTP = 2049 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 2050 return QualType(FTP, 0); 2051 2052 // Determine whether the type being created is already canonical or not. 2053 bool isCanonical= EPI.ExceptionSpecType == EST_None && ResultTy.isCanonical(); 2054 for (unsigned i = 0; i != NumArgs && isCanonical; ++i) 2055 if (!ArgArray[i].isCanonicalAsParam()) 2056 isCanonical = false; 2057 2058 const CallingConv DefaultCC = EPI.ExtInfo.getCC(); 2059 const CallingConv CallConv = (LangOpts.MRTD && DefaultCC == CC_Default) ? 2060 CC_X86StdCall : DefaultCC; 2061 2062 // If this type isn't canonical, get the canonical version of it. 2063 // The exception spec is not part of the canonical type. 2064 QualType Canonical; 2065 if (!isCanonical || getCanonicalCallConv(CallConv) != CallConv) { 2066 SmallVector<QualType, 16> CanonicalArgs; 2067 CanonicalArgs.reserve(NumArgs); 2068 for (unsigned i = 0; i != NumArgs; ++i) 2069 CanonicalArgs.push_back(getCanonicalParamType(ArgArray[i])); 2070 2071 FunctionProtoType::ExtProtoInfo CanonicalEPI = EPI; 2072 CanonicalEPI.ExceptionSpecType = EST_None; 2073 CanonicalEPI.NumExceptions = 0; 2074 CanonicalEPI.ExtInfo 2075 = CanonicalEPI.ExtInfo.withCallingConv(getCanonicalCallConv(CallConv)); 2076 2077 Canonical = getFunctionType(getCanonicalType(ResultTy), 2078 CanonicalArgs.data(), NumArgs, 2079 CanonicalEPI); 2080 2081 // Get the new insert position for the node we care about. 2082 FunctionProtoType *NewIP = 2083 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 2084 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 2085 } 2086 2087 // FunctionProtoType objects are allocated with extra bytes after 2088 // them for three variable size arrays at the end: 2089 // - parameter types 2090 // - exception types 2091 // - consumed-arguments flags 2092 // Instead of the exception types, there could be a noexcept 2093 // expression. 2094 size_t Size = sizeof(FunctionProtoType) + 2095 NumArgs * sizeof(QualType); 2096 if (EPI.ExceptionSpecType == EST_Dynamic) 2097 Size += EPI.NumExceptions * sizeof(QualType); 2098 else if (EPI.ExceptionSpecType == EST_ComputedNoexcept) { 2099 Size += sizeof(Expr*); 2100 } 2101 if (EPI.ConsumedArguments) 2102 Size += NumArgs * sizeof(bool); 2103 2104 FunctionProtoType *FTP = (FunctionProtoType*) Allocate(Size, TypeAlignment); 2105 FunctionProtoType::ExtProtoInfo newEPI = EPI; 2106 newEPI.ExtInfo = EPI.ExtInfo.withCallingConv(CallConv); 2107 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, Canonical, newEPI); 2108 Types.push_back(FTP); 2109 FunctionProtoTypes.InsertNode(FTP, InsertPos); 2110 return QualType(FTP, 0); 2111} 2112 2113#ifndef NDEBUG 2114static bool NeedsInjectedClassNameType(const RecordDecl *D) { 2115 if (!isa<CXXRecordDecl>(D)) return false; 2116 const CXXRecordDecl *RD = cast<CXXRecordDecl>(D); 2117 if (isa<ClassTemplatePartialSpecializationDecl>(RD)) 2118 return true; 2119 if (RD->getDescribedClassTemplate() && 2120 !isa<ClassTemplateSpecializationDecl>(RD)) 2121 return true; 2122 return false; 2123} 2124#endif 2125 2126/// getInjectedClassNameType - Return the unique reference to the 2127/// injected class name type for the specified templated declaration. 2128QualType ASTContext::getInjectedClassNameType(CXXRecordDecl *Decl, 2129 QualType TST) const { 2130 assert(NeedsInjectedClassNameType(Decl)); 2131 if (Decl->TypeForDecl) { 2132 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 2133 } else if (CXXRecordDecl *PrevDecl = Decl->getPreviousDeclaration()) { 2134 assert(PrevDecl->TypeForDecl && "previous declaration has no type"); 2135 Decl->TypeForDecl = PrevDecl->TypeForDecl; 2136 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 2137 } else { 2138 Type *newType = 2139 new (*this, TypeAlignment) InjectedClassNameType(Decl, TST); 2140 Decl->TypeForDecl = newType; 2141 Types.push_back(newType); 2142 } 2143 return QualType(Decl->TypeForDecl, 0); 2144} 2145 2146/// getTypeDeclType - Return the unique reference to the type for the 2147/// specified type declaration. 2148QualType ASTContext::getTypeDeclTypeSlow(const TypeDecl *Decl) const { 2149 assert(Decl && "Passed null for Decl param"); 2150 assert(!Decl->TypeForDecl && "TypeForDecl present in slow case"); 2151 2152 if (const TypedefNameDecl *Typedef = dyn_cast<TypedefNameDecl>(Decl)) 2153 return getTypedefType(Typedef); 2154 2155 assert(!isa<TemplateTypeParmDecl>(Decl) && 2156 "Template type parameter types are always available."); 2157 2158 if (const RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) { 2159 assert(!Record->getPreviousDeclaration() && 2160 "struct/union has previous declaration"); 2161 assert(!NeedsInjectedClassNameType(Record)); 2162 return getRecordType(Record); 2163 } else if (const EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) { 2164 assert(!Enum->getPreviousDeclaration() && 2165 "enum has previous declaration"); 2166 return getEnumType(Enum); 2167 } else if (const UnresolvedUsingTypenameDecl *Using = 2168 dyn_cast<UnresolvedUsingTypenameDecl>(Decl)) { 2169 Type *newType = new (*this, TypeAlignment) UnresolvedUsingType(Using); 2170 Decl->TypeForDecl = newType; 2171 Types.push_back(newType); 2172 } else 2173 llvm_unreachable("TypeDecl without a type?"); 2174 2175 return QualType(Decl->TypeForDecl, 0); 2176} 2177 2178/// getTypedefType - Return the unique reference to the type for the 2179/// specified typedef name decl. 2180QualType 2181ASTContext::getTypedefType(const TypedefNameDecl *Decl, 2182 QualType Canonical) const { 2183 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2184 2185 if (Canonical.isNull()) 2186 Canonical = getCanonicalType(Decl->getUnderlyingType()); 2187 TypedefType *newType = new(*this, TypeAlignment) 2188 TypedefType(Type::Typedef, Decl, Canonical); 2189 Decl->TypeForDecl = newType; 2190 Types.push_back(newType); 2191 return QualType(newType, 0); 2192} 2193 2194QualType ASTContext::getRecordType(const RecordDecl *Decl) const { 2195 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2196 2197 if (const RecordDecl *PrevDecl = Decl->getPreviousDeclaration()) 2198 if (PrevDecl->TypeForDecl) 2199 return QualType(Decl->TypeForDecl = PrevDecl->TypeForDecl, 0); 2200 2201 RecordType *newType = new (*this, TypeAlignment) RecordType(Decl); 2202 Decl->TypeForDecl = newType; 2203 Types.push_back(newType); 2204 return QualType(newType, 0); 2205} 2206 2207QualType ASTContext::getEnumType(const EnumDecl *Decl) const { 2208 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2209 2210 if (const EnumDecl *PrevDecl = Decl->getPreviousDeclaration()) 2211 if (PrevDecl->TypeForDecl) 2212 return QualType(Decl->TypeForDecl = PrevDecl->TypeForDecl, 0); 2213 2214 EnumType *newType = new (*this, TypeAlignment) EnumType(Decl); 2215 Decl->TypeForDecl = newType; 2216 Types.push_back(newType); 2217 return QualType(newType, 0); 2218} 2219 2220QualType ASTContext::getAttributedType(AttributedType::Kind attrKind, 2221 QualType modifiedType, 2222 QualType equivalentType) { 2223 llvm::FoldingSetNodeID id; 2224 AttributedType::Profile(id, attrKind, modifiedType, equivalentType); 2225 2226 void *insertPos = 0; 2227 AttributedType *type = AttributedTypes.FindNodeOrInsertPos(id, insertPos); 2228 if (type) return QualType(type, 0); 2229 2230 QualType canon = getCanonicalType(equivalentType); 2231 type = new (*this, TypeAlignment) 2232 AttributedType(canon, attrKind, modifiedType, equivalentType); 2233 2234 Types.push_back(type); 2235 AttributedTypes.InsertNode(type, insertPos); 2236 2237 return QualType(type, 0); 2238} 2239 2240 2241/// \brief Retrieve a substitution-result type. 2242QualType 2243ASTContext::getSubstTemplateTypeParmType(const TemplateTypeParmType *Parm, 2244 QualType Replacement) const { 2245 assert(Replacement.isCanonical() 2246 && "replacement types must always be canonical"); 2247 2248 llvm::FoldingSetNodeID ID; 2249 SubstTemplateTypeParmType::Profile(ID, Parm, Replacement); 2250 void *InsertPos = 0; 2251 SubstTemplateTypeParmType *SubstParm 2252 = SubstTemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2253 2254 if (!SubstParm) { 2255 SubstParm = new (*this, TypeAlignment) 2256 SubstTemplateTypeParmType(Parm, Replacement); 2257 Types.push_back(SubstParm); 2258 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 2259 } 2260 2261 return QualType(SubstParm, 0); 2262} 2263 2264/// \brief Retrieve a 2265QualType ASTContext::getSubstTemplateTypeParmPackType( 2266 const TemplateTypeParmType *Parm, 2267 const TemplateArgument &ArgPack) { 2268#ifndef NDEBUG 2269 for (TemplateArgument::pack_iterator P = ArgPack.pack_begin(), 2270 PEnd = ArgPack.pack_end(); 2271 P != PEnd; ++P) { 2272 assert(P->getKind() == TemplateArgument::Type &&"Pack contains a non-type"); 2273 assert(P->getAsType().isCanonical() && "Pack contains non-canonical type"); 2274 } 2275#endif 2276 2277 llvm::FoldingSetNodeID ID; 2278 SubstTemplateTypeParmPackType::Profile(ID, Parm, ArgPack); 2279 void *InsertPos = 0; 2280 if (SubstTemplateTypeParmPackType *SubstParm 2281 = SubstTemplateTypeParmPackTypes.FindNodeOrInsertPos(ID, InsertPos)) 2282 return QualType(SubstParm, 0); 2283 2284 QualType Canon; 2285 if (!Parm->isCanonicalUnqualified()) { 2286 Canon = getCanonicalType(QualType(Parm, 0)); 2287 Canon = getSubstTemplateTypeParmPackType(cast<TemplateTypeParmType>(Canon), 2288 ArgPack); 2289 SubstTemplateTypeParmPackTypes.FindNodeOrInsertPos(ID, InsertPos); 2290 } 2291 2292 SubstTemplateTypeParmPackType *SubstParm 2293 = new (*this, TypeAlignment) SubstTemplateTypeParmPackType(Parm, Canon, 2294 ArgPack); 2295 Types.push_back(SubstParm); 2296 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 2297 return QualType(SubstParm, 0); 2298} 2299 2300/// \brief Retrieve the template type parameter type for a template 2301/// parameter or parameter pack with the given depth, index, and (optionally) 2302/// name. 2303QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index, 2304 bool ParameterPack, 2305 TemplateTypeParmDecl *TTPDecl) const { 2306 llvm::FoldingSetNodeID ID; 2307 TemplateTypeParmType::Profile(ID, Depth, Index, ParameterPack, TTPDecl); 2308 void *InsertPos = 0; 2309 TemplateTypeParmType *TypeParm 2310 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2311 2312 if (TypeParm) 2313 return QualType(TypeParm, 0); 2314 2315 if (TTPDecl) { 2316 QualType Canon = getTemplateTypeParmType(Depth, Index, ParameterPack); 2317 TypeParm = new (*this, TypeAlignment) TemplateTypeParmType(TTPDecl, Canon); 2318 2319 TemplateTypeParmType *TypeCheck 2320 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2321 assert(!TypeCheck && "Template type parameter canonical type broken"); 2322 (void)TypeCheck; 2323 } else 2324 TypeParm = new (*this, TypeAlignment) 2325 TemplateTypeParmType(Depth, Index, ParameterPack); 2326 2327 Types.push_back(TypeParm); 2328 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos); 2329 2330 return QualType(TypeParm, 0); 2331} 2332 2333TypeSourceInfo * 2334ASTContext::getTemplateSpecializationTypeInfo(TemplateName Name, 2335 SourceLocation NameLoc, 2336 const TemplateArgumentListInfo &Args, 2337 QualType Underlying) const { 2338 assert(!Name.getAsDependentTemplateName() && 2339 "No dependent template names here!"); 2340 QualType TST = getTemplateSpecializationType(Name, Args, Underlying); 2341 2342 TypeSourceInfo *DI = CreateTypeSourceInfo(TST); 2343 TemplateSpecializationTypeLoc TL 2344 = cast<TemplateSpecializationTypeLoc>(DI->getTypeLoc()); 2345 TL.setTemplateNameLoc(NameLoc); 2346 TL.setLAngleLoc(Args.getLAngleLoc()); 2347 TL.setRAngleLoc(Args.getRAngleLoc()); 2348 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 2349 TL.setArgLocInfo(i, Args[i].getLocInfo()); 2350 return DI; 2351} 2352 2353QualType 2354ASTContext::getTemplateSpecializationType(TemplateName Template, 2355 const TemplateArgumentListInfo &Args, 2356 QualType Underlying) const { 2357 assert(!Template.getAsDependentTemplateName() && 2358 "No dependent template names here!"); 2359 2360 unsigned NumArgs = Args.size(); 2361 2362 SmallVector<TemplateArgument, 4> ArgVec; 2363 ArgVec.reserve(NumArgs); 2364 for (unsigned i = 0; i != NumArgs; ++i) 2365 ArgVec.push_back(Args[i].getArgument()); 2366 2367 return getTemplateSpecializationType(Template, ArgVec.data(), NumArgs, 2368 Underlying); 2369} 2370 2371QualType 2372ASTContext::getTemplateSpecializationType(TemplateName Template, 2373 const TemplateArgument *Args, 2374 unsigned NumArgs, 2375 QualType Underlying) const { 2376 assert(!Template.getAsDependentTemplateName() && 2377 "No dependent template names here!"); 2378 // Look through qualified template names. 2379 if (QualifiedTemplateName *QTN = Template.getAsQualifiedTemplateName()) 2380 Template = TemplateName(QTN->getTemplateDecl()); 2381 2382 bool isTypeAlias = 2383 Template.getAsTemplateDecl() && 2384 isa<TypeAliasTemplateDecl>(Template.getAsTemplateDecl()); 2385 2386 QualType CanonType; 2387 if (!Underlying.isNull()) 2388 CanonType = getCanonicalType(Underlying); 2389 else { 2390 assert(!isTypeAlias && 2391 "Underlying type for template alias must be computed by caller"); 2392 CanonType = getCanonicalTemplateSpecializationType(Template, Args, 2393 NumArgs); 2394 } 2395 2396 // Allocate the (non-canonical) template specialization type, but don't 2397 // try to unique it: these types typically have location information that 2398 // we don't unique and don't want to lose. 2399 void *Mem = Allocate(sizeof(TemplateSpecializationType) + 2400 sizeof(TemplateArgument) * NumArgs + 2401 (isTypeAlias ? sizeof(QualType) : 0), 2402 TypeAlignment); 2403 TemplateSpecializationType *Spec 2404 = new (Mem) TemplateSpecializationType(Template, 2405 Args, NumArgs, 2406 CanonType, 2407 isTypeAlias ? Underlying : QualType()); 2408 2409 Types.push_back(Spec); 2410 return QualType(Spec, 0); 2411} 2412 2413QualType 2414ASTContext::getCanonicalTemplateSpecializationType(TemplateName Template, 2415 const TemplateArgument *Args, 2416 unsigned NumArgs) const { 2417 assert(!Template.getAsDependentTemplateName() && 2418 "No dependent template names here!"); 2419 assert((!Template.getAsTemplateDecl() || 2420 !isa<TypeAliasTemplateDecl>(Template.getAsTemplateDecl())) && 2421 "Underlying type for template alias must be computed by caller"); 2422 2423 // Look through qualified template names. 2424 if (QualifiedTemplateName *QTN = Template.getAsQualifiedTemplateName()) 2425 Template = TemplateName(QTN->getTemplateDecl()); 2426 2427 // Build the canonical template specialization type. 2428 TemplateName CanonTemplate = getCanonicalTemplateName(Template); 2429 SmallVector<TemplateArgument, 4> CanonArgs; 2430 CanonArgs.reserve(NumArgs); 2431 for (unsigned I = 0; I != NumArgs; ++I) 2432 CanonArgs.push_back(getCanonicalTemplateArgument(Args[I])); 2433 2434 // Determine whether this canonical template specialization type already 2435 // exists. 2436 llvm::FoldingSetNodeID ID; 2437 TemplateSpecializationType::Profile(ID, CanonTemplate, 2438 CanonArgs.data(), NumArgs, *this); 2439 2440 void *InsertPos = 0; 2441 TemplateSpecializationType *Spec 2442 = TemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2443 2444 if (!Spec) { 2445 // Allocate a new canonical template specialization type. 2446 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 2447 sizeof(TemplateArgument) * NumArgs), 2448 TypeAlignment); 2449 Spec = new (Mem) TemplateSpecializationType(CanonTemplate, 2450 CanonArgs.data(), NumArgs, 2451 QualType(), QualType()); 2452 Types.push_back(Spec); 2453 TemplateSpecializationTypes.InsertNode(Spec, InsertPos); 2454 } 2455 2456 assert(Spec->isDependentType() && 2457 "Non-dependent template-id type must have a canonical type"); 2458 return QualType(Spec, 0); 2459} 2460 2461QualType 2462ASTContext::getElaboratedType(ElaboratedTypeKeyword Keyword, 2463 NestedNameSpecifier *NNS, 2464 QualType NamedType) const { 2465 llvm::FoldingSetNodeID ID; 2466 ElaboratedType::Profile(ID, Keyword, NNS, NamedType); 2467 2468 void *InsertPos = 0; 2469 ElaboratedType *T = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2470 if (T) 2471 return QualType(T, 0); 2472 2473 QualType Canon = NamedType; 2474 if (!Canon.isCanonical()) { 2475 Canon = getCanonicalType(NamedType); 2476 ElaboratedType *CheckT = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2477 assert(!CheckT && "Elaborated canonical type broken"); 2478 (void)CheckT; 2479 } 2480 2481 T = new (*this) ElaboratedType(Keyword, NNS, NamedType, Canon); 2482 Types.push_back(T); 2483 ElaboratedTypes.InsertNode(T, InsertPos); 2484 return QualType(T, 0); 2485} 2486 2487QualType 2488ASTContext::getParenType(QualType InnerType) const { 2489 llvm::FoldingSetNodeID ID; 2490 ParenType::Profile(ID, InnerType); 2491 2492 void *InsertPos = 0; 2493 ParenType *T = ParenTypes.FindNodeOrInsertPos(ID, InsertPos); 2494 if (T) 2495 return QualType(T, 0); 2496 2497 QualType Canon = InnerType; 2498 if (!Canon.isCanonical()) { 2499 Canon = getCanonicalType(InnerType); 2500 ParenType *CheckT = ParenTypes.FindNodeOrInsertPos(ID, InsertPos); 2501 assert(!CheckT && "Paren canonical type broken"); 2502 (void)CheckT; 2503 } 2504 2505 T = new (*this) ParenType(InnerType, Canon); 2506 Types.push_back(T); 2507 ParenTypes.InsertNode(T, InsertPos); 2508 return QualType(T, 0); 2509} 2510 2511QualType ASTContext::getDependentNameType(ElaboratedTypeKeyword Keyword, 2512 NestedNameSpecifier *NNS, 2513 const IdentifierInfo *Name, 2514 QualType Canon) const { 2515 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 2516 2517 if (Canon.isNull()) { 2518 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2519 ElaboratedTypeKeyword CanonKeyword = Keyword; 2520 if (Keyword == ETK_None) 2521 CanonKeyword = ETK_Typename; 2522 2523 if (CanonNNS != NNS || CanonKeyword != Keyword) 2524 Canon = getDependentNameType(CanonKeyword, CanonNNS, Name); 2525 } 2526 2527 llvm::FoldingSetNodeID ID; 2528 DependentNameType::Profile(ID, Keyword, NNS, Name); 2529 2530 void *InsertPos = 0; 2531 DependentNameType *T 2532 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 2533 if (T) 2534 return QualType(T, 0); 2535 2536 T = new (*this) DependentNameType(Keyword, NNS, Name, Canon); 2537 Types.push_back(T); 2538 DependentNameTypes.InsertNode(T, InsertPos); 2539 return QualType(T, 0); 2540} 2541 2542QualType 2543ASTContext::getDependentTemplateSpecializationType( 2544 ElaboratedTypeKeyword Keyword, 2545 NestedNameSpecifier *NNS, 2546 const IdentifierInfo *Name, 2547 const TemplateArgumentListInfo &Args) const { 2548 // TODO: avoid this copy 2549 SmallVector<TemplateArgument, 16> ArgCopy; 2550 for (unsigned I = 0, E = Args.size(); I != E; ++I) 2551 ArgCopy.push_back(Args[I].getArgument()); 2552 return getDependentTemplateSpecializationType(Keyword, NNS, Name, 2553 ArgCopy.size(), 2554 ArgCopy.data()); 2555} 2556 2557QualType 2558ASTContext::getDependentTemplateSpecializationType( 2559 ElaboratedTypeKeyword Keyword, 2560 NestedNameSpecifier *NNS, 2561 const IdentifierInfo *Name, 2562 unsigned NumArgs, 2563 const TemplateArgument *Args) const { 2564 assert((!NNS || NNS->isDependent()) && 2565 "nested-name-specifier must be dependent"); 2566 2567 llvm::FoldingSetNodeID ID; 2568 DependentTemplateSpecializationType::Profile(ID, *this, Keyword, NNS, 2569 Name, NumArgs, Args); 2570 2571 void *InsertPos = 0; 2572 DependentTemplateSpecializationType *T 2573 = DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2574 if (T) 2575 return QualType(T, 0); 2576 2577 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2578 2579 ElaboratedTypeKeyword CanonKeyword = Keyword; 2580 if (Keyword == ETK_None) CanonKeyword = ETK_Typename; 2581 2582 bool AnyNonCanonArgs = false; 2583 SmallVector<TemplateArgument, 16> CanonArgs(NumArgs); 2584 for (unsigned I = 0; I != NumArgs; ++I) { 2585 CanonArgs[I] = getCanonicalTemplateArgument(Args[I]); 2586 if (!CanonArgs[I].structurallyEquals(Args[I])) 2587 AnyNonCanonArgs = true; 2588 } 2589 2590 QualType Canon; 2591 if (AnyNonCanonArgs || CanonNNS != NNS || CanonKeyword != Keyword) { 2592 Canon = getDependentTemplateSpecializationType(CanonKeyword, CanonNNS, 2593 Name, NumArgs, 2594 CanonArgs.data()); 2595 2596 // Find the insert position again. 2597 DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2598 } 2599 2600 void *Mem = Allocate((sizeof(DependentTemplateSpecializationType) + 2601 sizeof(TemplateArgument) * NumArgs), 2602 TypeAlignment); 2603 T = new (Mem) DependentTemplateSpecializationType(Keyword, NNS, 2604 Name, NumArgs, Args, Canon); 2605 Types.push_back(T); 2606 DependentTemplateSpecializationTypes.InsertNode(T, InsertPos); 2607 return QualType(T, 0); 2608} 2609 2610QualType ASTContext::getPackExpansionType(QualType Pattern, 2611 llvm::Optional<unsigned> NumExpansions) { 2612 llvm::FoldingSetNodeID ID; 2613 PackExpansionType::Profile(ID, Pattern, NumExpansions); 2614 2615 assert(Pattern->containsUnexpandedParameterPack() && 2616 "Pack expansions must expand one or more parameter packs"); 2617 void *InsertPos = 0; 2618 PackExpansionType *T 2619 = PackExpansionTypes.FindNodeOrInsertPos(ID, InsertPos); 2620 if (T) 2621 return QualType(T, 0); 2622 2623 QualType Canon; 2624 if (!Pattern.isCanonical()) { 2625 Canon = getPackExpansionType(getCanonicalType(Pattern), NumExpansions); 2626 2627 // Find the insert position again. 2628 PackExpansionTypes.FindNodeOrInsertPos(ID, InsertPos); 2629 } 2630 2631 T = new (*this) PackExpansionType(Pattern, Canon, NumExpansions); 2632 Types.push_back(T); 2633 PackExpansionTypes.InsertNode(T, InsertPos); 2634 return QualType(T, 0); 2635} 2636 2637/// CmpProtocolNames - Comparison predicate for sorting protocols 2638/// alphabetically. 2639static bool CmpProtocolNames(const ObjCProtocolDecl *LHS, 2640 const ObjCProtocolDecl *RHS) { 2641 return LHS->getDeclName() < RHS->getDeclName(); 2642} 2643 2644static bool areSortedAndUniqued(ObjCProtocolDecl * const *Protocols, 2645 unsigned NumProtocols) { 2646 if (NumProtocols == 0) return true; 2647 2648 for (unsigned i = 1; i != NumProtocols; ++i) 2649 if (!CmpProtocolNames(Protocols[i-1], Protocols[i])) 2650 return false; 2651 return true; 2652} 2653 2654static void SortAndUniqueProtocols(ObjCProtocolDecl **Protocols, 2655 unsigned &NumProtocols) { 2656 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols; 2657 2658 // Sort protocols, keyed by name. 2659 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames); 2660 2661 // Remove duplicates. 2662 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd); 2663 NumProtocols = ProtocolsEnd-Protocols; 2664} 2665 2666QualType ASTContext::getObjCObjectType(QualType BaseType, 2667 ObjCProtocolDecl * const *Protocols, 2668 unsigned NumProtocols) const { 2669 // If the base type is an interface and there aren't any protocols 2670 // to add, then the interface type will do just fine. 2671 if (!NumProtocols && isa<ObjCInterfaceType>(BaseType)) 2672 return BaseType; 2673 2674 // Look in the folding set for an existing type. 2675 llvm::FoldingSetNodeID ID; 2676 ObjCObjectTypeImpl::Profile(ID, BaseType, Protocols, NumProtocols); 2677 void *InsertPos = 0; 2678 if (ObjCObjectType *QT = ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos)) 2679 return QualType(QT, 0); 2680 2681 // Build the canonical type, which has the canonical base type and 2682 // a sorted-and-uniqued list of protocols. 2683 QualType Canonical; 2684 bool ProtocolsSorted = areSortedAndUniqued(Protocols, NumProtocols); 2685 if (!ProtocolsSorted || !BaseType.isCanonical()) { 2686 if (!ProtocolsSorted) { 2687 SmallVector<ObjCProtocolDecl*, 8> Sorted(Protocols, 2688 Protocols + NumProtocols); 2689 unsigned UniqueCount = NumProtocols; 2690 2691 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2692 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2693 &Sorted[0], UniqueCount); 2694 } else { 2695 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2696 Protocols, NumProtocols); 2697 } 2698 2699 // Regenerate InsertPos. 2700 ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos); 2701 } 2702 2703 unsigned Size = sizeof(ObjCObjectTypeImpl); 2704 Size += NumProtocols * sizeof(ObjCProtocolDecl *); 2705 void *Mem = Allocate(Size, TypeAlignment); 2706 ObjCObjectTypeImpl *T = 2707 new (Mem) ObjCObjectTypeImpl(Canonical, BaseType, Protocols, NumProtocols); 2708 2709 Types.push_back(T); 2710 ObjCObjectTypes.InsertNode(T, InsertPos); 2711 return QualType(T, 0); 2712} 2713 2714/// getObjCObjectPointerType - Return a ObjCObjectPointerType type for 2715/// the given object type. 2716QualType ASTContext::getObjCObjectPointerType(QualType ObjectT) const { 2717 llvm::FoldingSetNodeID ID; 2718 ObjCObjectPointerType::Profile(ID, ObjectT); 2719 2720 void *InsertPos = 0; 2721 if (ObjCObjectPointerType *QT = 2722 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 2723 return QualType(QT, 0); 2724 2725 // Find the canonical object type. 2726 QualType Canonical; 2727 if (!ObjectT.isCanonical()) { 2728 Canonical = getObjCObjectPointerType(getCanonicalType(ObjectT)); 2729 2730 // Regenerate InsertPos. 2731 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 2732 } 2733 2734 // No match. 2735 void *Mem = Allocate(sizeof(ObjCObjectPointerType), TypeAlignment); 2736 ObjCObjectPointerType *QType = 2737 new (Mem) ObjCObjectPointerType(Canonical, ObjectT); 2738 2739 Types.push_back(QType); 2740 ObjCObjectPointerTypes.InsertNode(QType, InsertPos); 2741 return QualType(QType, 0); 2742} 2743 2744/// getObjCInterfaceType - Return the unique reference to the type for the 2745/// specified ObjC interface decl. The list of protocols is optional. 2746QualType ASTContext::getObjCInterfaceType(const ObjCInterfaceDecl *Decl) const { 2747 if (Decl->TypeForDecl) 2748 return QualType(Decl->TypeForDecl, 0); 2749 2750 // FIXME: redeclarations? 2751 void *Mem = Allocate(sizeof(ObjCInterfaceType), TypeAlignment); 2752 ObjCInterfaceType *T = new (Mem) ObjCInterfaceType(Decl); 2753 Decl->TypeForDecl = T; 2754 Types.push_back(T); 2755 return QualType(T, 0); 2756} 2757 2758/// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique 2759/// TypeOfExprType AST's (since expression's are never shared). For example, 2760/// multiple declarations that refer to "typeof(x)" all contain different 2761/// DeclRefExpr's. This doesn't effect the type checker, since it operates 2762/// on canonical type's (which are always unique). 2763QualType ASTContext::getTypeOfExprType(Expr *tofExpr) const { 2764 TypeOfExprType *toe; 2765 if (tofExpr->isTypeDependent()) { 2766 llvm::FoldingSetNodeID ID; 2767 DependentTypeOfExprType::Profile(ID, *this, tofExpr); 2768 2769 void *InsertPos = 0; 2770 DependentTypeOfExprType *Canon 2771 = DependentTypeOfExprTypes.FindNodeOrInsertPos(ID, InsertPos); 2772 if (Canon) { 2773 // We already have a "canonical" version of an identical, dependent 2774 // typeof(expr) type. Use that as our canonical type. 2775 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, 2776 QualType((TypeOfExprType*)Canon, 0)); 2777 } else { 2778 // Build a new, canonical typeof(expr) type. 2779 Canon 2780 = new (*this, TypeAlignment) DependentTypeOfExprType(*this, tofExpr); 2781 DependentTypeOfExprTypes.InsertNode(Canon, InsertPos); 2782 toe = Canon; 2783 } 2784 } else { 2785 QualType Canonical = getCanonicalType(tofExpr->getType()); 2786 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, Canonical); 2787 } 2788 Types.push_back(toe); 2789 return QualType(toe, 0); 2790} 2791 2792/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique 2793/// TypeOfType AST's. The only motivation to unique these nodes would be 2794/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be 2795/// an issue. This doesn't effect the type checker, since it operates 2796/// on canonical type's (which are always unique). 2797QualType ASTContext::getTypeOfType(QualType tofType) const { 2798 QualType Canonical = getCanonicalType(tofType); 2799 TypeOfType *tot = new (*this, TypeAlignment) TypeOfType(tofType, Canonical); 2800 Types.push_back(tot); 2801 return QualType(tot, 0); 2802} 2803 2804/// getDecltypeForExpr - Given an expr, will return the decltype for that 2805/// expression, according to the rules in C++0x [dcl.type.simple]p4 2806static QualType getDecltypeForExpr(const Expr *e, const ASTContext &Context) { 2807 if (e->isTypeDependent()) 2808 return Context.DependentTy; 2809 2810 // If e is an id expression or a class member access, decltype(e) is defined 2811 // as the type of the entity named by e. 2812 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(e)) { 2813 if (const ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl())) 2814 return VD->getType(); 2815 } 2816 if (const MemberExpr *ME = dyn_cast<MemberExpr>(e)) { 2817 if (const FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) 2818 return FD->getType(); 2819 } 2820 // If e is a function call or an invocation of an overloaded operator, 2821 // (parentheses around e are ignored), decltype(e) is defined as the 2822 // return type of that function. 2823 if (const CallExpr *CE = dyn_cast<CallExpr>(e->IgnoreParens())) 2824 return CE->getCallReturnType(); 2825 2826 QualType T = e->getType(); 2827 2828 // Otherwise, where T is the type of e, if e is an lvalue, decltype(e) is 2829 // defined as T&, otherwise decltype(e) is defined as T. 2830 if (e->isLValue()) 2831 T = Context.getLValueReferenceType(T); 2832 2833 return T; 2834} 2835 2836/// getDecltypeType - Unlike many "get<Type>" functions, we don't unique 2837/// DecltypeType AST's. The only motivation to unique these nodes would be 2838/// memory savings. Since decltype(t) is fairly uncommon, space shouldn't be 2839/// an issue. This doesn't effect the type checker, since it operates 2840/// on canonical type's (which are always unique). 2841QualType ASTContext::getDecltypeType(Expr *e) const { 2842 DecltypeType *dt; 2843 2844 // C++0x [temp.type]p2: 2845 // If an expression e involves a template parameter, decltype(e) denotes a 2846 // unique dependent type. Two such decltype-specifiers refer to the same 2847 // type only if their expressions are equivalent (14.5.6.1). 2848 if (e->isInstantiationDependent()) { 2849 llvm::FoldingSetNodeID ID; 2850 DependentDecltypeType::Profile(ID, *this, e); 2851 2852 void *InsertPos = 0; 2853 DependentDecltypeType *Canon 2854 = DependentDecltypeTypes.FindNodeOrInsertPos(ID, InsertPos); 2855 if (Canon) { 2856 // We already have a "canonical" version of an equivalent, dependent 2857 // decltype type. Use that as our canonical type. 2858 dt = new (*this, TypeAlignment) DecltypeType(e, DependentTy, 2859 QualType((DecltypeType*)Canon, 0)); 2860 } else { 2861 // Build a new, canonical typeof(expr) type. 2862 Canon = new (*this, TypeAlignment) DependentDecltypeType(*this, e); 2863 DependentDecltypeTypes.InsertNode(Canon, InsertPos); 2864 dt = Canon; 2865 } 2866 } else { 2867 QualType T = getDecltypeForExpr(e, *this); 2868 dt = new (*this, TypeAlignment) DecltypeType(e, T, getCanonicalType(T)); 2869 } 2870 Types.push_back(dt); 2871 return QualType(dt, 0); 2872} 2873 2874/// getUnaryTransformationType - We don't unique these, since the memory 2875/// savings are minimal and these are rare. 2876QualType ASTContext::getUnaryTransformType(QualType BaseType, 2877 QualType UnderlyingType, 2878 UnaryTransformType::UTTKind Kind) 2879 const { 2880 UnaryTransformType *Ty = 2881 new (*this, TypeAlignment) UnaryTransformType (BaseType, UnderlyingType, 2882 Kind, 2883 UnderlyingType->isDependentType() ? 2884 QualType() : UnderlyingType); 2885 Types.push_back(Ty); 2886 return QualType(Ty, 0); 2887} 2888 2889/// getAutoType - We only unique auto types after they've been deduced. 2890QualType ASTContext::getAutoType(QualType DeducedType) const { 2891 void *InsertPos = 0; 2892 if (!DeducedType.isNull()) { 2893 // Look in the folding set for an existing type. 2894 llvm::FoldingSetNodeID ID; 2895 AutoType::Profile(ID, DeducedType); 2896 if (AutoType *AT = AutoTypes.FindNodeOrInsertPos(ID, InsertPos)) 2897 return QualType(AT, 0); 2898 } 2899 2900 AutoType *AT = new (*this, TypeAlignment) AutoType(DeducedType); 2901 Types.push_back(AT); 2902 if (InsertPos) 2903 AutoTypes.InsertNode(AT, InsertPos); 2904 return QualType(AT, 0); 2905} 2906 2907/// getAutoDeductType - Get type pattern for deducing against 'auto'. 2908QualType ASTContext::getAutoDeductType() const { 2909 if (AutoDeductTy.isNull()) 2910 AutoDeductTy = getAutoType(QualType()); 2911 assert(!AutoDeductTy.isNull() && "can't build 'auto' pattern"); 2912 return AutoDeductTy; 2913} 2914 2915/// getAutoRRefDeductType - Get type pattern for deducing against 'auto &&'. 2916QualType ASTContext::getAutoRRefDeductType() const { 2917 if (AutoRRefDeductTy.isNull()) 2918 AutoRRefDeductTy = getRValueReferenceType(getAutoDeductType()); 2919 assert(!AutoRRefDeductTy.isNull() && "can't build 'auto &&' pattern"); 2920 return AutoRRefDeductTy; 2921} 2922 2923/// getTagDeclType - Return the unique reference to the type for the 2924/// specified TagDecl (struct/union/class/enum) decl. 2925QualType ASTContext::getTagDeclType(const TagDecl *Decl) const { 2926 assert (Decl); 2927 // FIXME: What is the design on getTagDeclType when it requires casting 2928 // away const? mutable? 2929 return getTypeDeclType(const_cast<TagDecl*>(Decl)); 2930} 2931 2932/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result 2933/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and 2934/// needs to agree with the definition in <stddef.h>. 2935CanQualType ASTContext::getSizeType() const { 2936 return getFromTargetType(Target->getSizeType()); 2937} 2938 2939/// getSignedWCharType - Return the type of "signed wchar_t". 2940/// Used when in C++, as a GCC extension. 2941QualType ASTContext::getSignedWCharType() const { 2942 // FIXME: derive from "Target" ? 2943 return WCharTy; 2944} 2945 2946/// getUnsignedWCharType - Return the type of "unsigned wchar_t". 2947/// Used when in C++, as a GCC extension. 2948QualType ASTContext::getUnsignedWCharType() const { 2949 // FIXME: derive from "Target" ? 2950 return UnsignedIntTy; 2951} 2952 2953/// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 2954/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 2955QualType ASTContext::getPointerDiffType() const { 2956 return getFromTargetType(Target->getPtrDiffType(0)); 2957} 2958 2959//===----------------------------------------------------------------------===// 2960// Type Operators 2961//===----------------------------------------------------------------------===// 2962 2963CanQualType ASTContext::getCanonicalParamType(QualType T) const { 2964 // Push qualifiers into arrays, and then discard any remaining 2965 // qualifiers. 2966 T = getCanonicalType(T); 2967 T = getVariableArrayDecayedType(T); 2968 const Type *Ty = T.getTypePtr(); 2969 QualType Result; 2970 if (isa<ArrayType>(Ty)) { 2971 Result = getArrayDecayedType(QualType(Ty,0)); 2972 } else if (isa<FunctionType>(Ty)) { 2973 Result = getPointerType(QualType(Ty, 0)); 2974 } else { 2975 Result = QualType(Ty, 0); 2976 } 2977 2978 return CanQualType::CreateUnsafe(Result); 2979} 2980 2981QualType ASTContext::getUnqualifiedArrayType(QualType type, 2982 Qualifiers &quals) { 2983 SplitQualType splitType = type.getSplitUnqualifiedType(); 2984 2985 // FIXME: getSplitUnqualifiedType() actually walks all the way to 2986 // the unqualified desugared type and then drops it on the floor. 2987 // We then have to strip that sugar back off with 2988 // getUnqualifiedDesugaredType(), which is silly. 2989 const ArrayType *AT = 2990 dyn_cast<ArrayType>(splitType.first->getUnqualifiedDesugaredType()); 2991 2992 // If we don't have an array, just use the results in splitType. 2993 if (!AT) { 2994 quals = splitType.second; 2995 return QualType(splitType.first, 0); 2996 } 2997 2998 // Otherwise, recurse on the array's element type. 2999 QualType elementType = AT->getElementType(); 3000 QualType unqualElementType = getUnqualifiedArrayType(elementType, quals); 3001 3002 // If that didn't change the element type, AT has no qualifiers, so we 3003 // can just use the results in splitType. 3004 if (elementType == unqualElementType) { 3005 assert(quals.empty()); // from the recursive call 3006 quals = splitType.second; 3007 return QualType(splitType.first, 0); 3008 } 3009 3010 // Otherwise, add in the qualifiers from the outermost type, then 3011 // build the type back up. 3012 quals.addConsistentQualifiers(splitType.second); 3013 3014 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) { 3015 return getConstantArrayType(unqualElementType, CAT->getSize(), 3016 CAT->getSizeModifier(), 0); 3017 } 3018 3019 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) { 3020 return getIncompleteArrayType(unqualElementType, IAT->getSizeModifier(), 0); 3021 } 3022 3023 if (const VariableArrayType *VAT = dyn_cast<VariableArrayType>(AT)) { 3024 return getVariableArrayType(unqualElementType, 3025 VAT->getSizeExpr(), 3026 VAT->getSizeModifier(), 3027 VAT->getIndexTypeCVRQualifiers(), 3028 VAT->getBracketsRange()); 3029 } 3030 3031 const DependentSizedArrayType *DSAT = cast<DependentSizedArrayType>(AT); 3032 return getDependentSizedArrayType(unqualElementType, DSAT->getSizeExpr(), 3033 DSAT->getSizeModifier(), 0, 3034 SourceRange()); 3035} 3036 3037/// UnwrapSimilarPointerTypes - If T1 and T2 are pointer types that 3038/// may be similar (C++ 4.4), replaces T1 and T2 with the type that 3039/// they point to and return true. If T1 and T2 aren't pointer types 3040/// or pointer-to-member types, or if they are not similar at this 3041/// level, returns false and leaves T1 and T2 unchanged. Top-level 3042/// qualifiers on T1 and T2 are ignored. This function will typically 3043/// be called in a loop that successively "unwraps" pointer and 3044/// pointer-to-member types to compare them at each level. 3045bool ASTContext::UnwrapSimilarPointerTypes(QualType &T1, QualType &T2) { 3046 const PointerType *T1PtrType = T1->getAs<PointerType>(), 3047 *T2PtrType = T2->getAs<PointerType>(); 3048 if (T1PtrType && T2PtrType) { 3049 T1 = T1PtrType->getPointeeType(); 3050 T2 = T2PtrType->getPointeeType(); 3051 return true; 3052 } 3053 3054 const MemberPointerType *T1MPType = T1->getAs<MemberPointerType>(), 3055 *T2MPType = T2->getAs<MemberPointerType>(); 3056 if (T1MPType && T2MPType && 3057 hasSameUnqualifiedType(QualType(T1MPType->getClass(), 0), 3058 QualType(T2MPType->getClass(), 0))) { 3059 T1 = T1MPType->getPointeeType(); 3060 T2 = T2MPType->getPointeeType(); 3061 return true; 3062 } 3063 3064 if (getLangOptions().ObjC1) { 3065 const ObjCObjectPointerType *T1OPType = T1->getAs<ObjCObjectPointerType>(), 3066 *T2OPType = T2->getAs<ObjCObjectPointerType>(); 3067 if (T1OPType && T2OPType) { 3068 T1 = T1OPType->getPointeeType(); 3069 T2 = T2OPType->getPointeeType(); 3070 return true; 3071 } 3072 } 3073 3074 // FIXME: Block pointers, too? 3075 3076 return false; 3077} 3078 3079DeclarationNameInfo 3080ASTContext::getNameForTemplate(TemplateName Name, 3081 SourceLocation NameLoc) const { 3082 switch (Name.getKind()) { 3083 case TemplateName::QualifiedTemplate: 3084 case TemplateName::Template: 3085 // DNInfo work in progress: CHECKME: what about DNLoc? 3086 return DeclarationNameInfo(Name.getAsTemplateDecl()->getDeclName(), 3087 NameLoc); 3088 3089 case TemplateName::OverloadedTemplate: { 3090 OverloadedTemplateStorage *Storage = Name.getAsOverloadedTemplate(); 3091 // DNInfo work in progress: CHECKME: what about DNLoc? 3092 return DeclarationNameInfo((*Storage->begin())->getDeclName(), NameLoc); 3093 } 3094 3095 case TemplateName::DependentTemplate: { 3096 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 3097 DeclarationName DName; 3098 if (DTN->isIdentifier()) { 3099 DName = DeclarationNames.getIdentifier(DTN->getIdentifier()); 3100 return DeclarationNameInfo(DName, NameLoc); 3101 } else { 3102 DName = DeclarationNames.getCXXOperatorName(DTN->getOperator()); 3103 // DNInfo work in progress: FIXME: source locations? 3104 DeclarationNameLoc DNLoc; 3105 DNLoc.CXXOperatorName.BeginOpNameLoc = SourceLocation().getRawEncoding(); 3106 DNLoc.CXXOperatorName.EndOpNameLoc = SourceLocation().getRawEncoding(); 3107 return DeclarationNameInfo(DName, NameLoc, DNLoc); 3108 } 3109 } 3110 3111 case TemplateName::SubstTemplateTemplateParm: { 3112 SubstTemplateTemplateParmStorage *subst 3113 = Name.getAsSubstTemplateTemplateParm(); 3114 return DeclarationNameInfo(subst->getParameter()->getDeclName(), 3115 NameLoc); 3116 } 3117 3118 case TemplateName::SubstTemplateTemplateParmPack: { 3119 SubstTemplateTemplateParmPackStorage *subst 3120 = Name.getAsSubstTemplateTemplateParmPack(); 3121 return DeclarationNameInfo(subst->getParameterPack()->getDeclName(), 3122 NameLoc); 3123 } 3124 } 3125 3126 llvm_unreachable("bad template name kind!"); 3127} 3128 3129TemplateName ASTContext::getCanonicalTemplateName(TemplateName Name) const { 3130 switch (Name.getKind()) { 3131 case TemplateName::QualifiedTemplate: 3132 case TemplateName::Template: { 3133 TemplateDecl *Template = Name.getAsTemplateDecl(); 3134 if (TemplateTemplateParmDecl *TTP 3135 = dyn_cast<TemplateTemplateParmDecl>(Template)) 3136 Template = getCanonicalTemplateTemplateParmDecl(TTP); 3137 3138 // The canonical template name is the canonical template declaration. 3139 return TemplateName(cast<TemplateDecl>(Template->getCanonicalDecl())); 3140 } 3141 3142 case TemplateName::OverloadedTemplate: 3143 llvm_unreachable("cannot canonicalize overloaded template"); 3144 3145 case TemplateName::DependentTemplate: { 3146 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 3147 assert(DTN && "Non-dependent template names must refer to template decls."); 3148 return DTN->CanonicalTemplateName; 3149 } 3150 3151 case TemplateName::SubstTemplateTemplateParm: { 3152 SubstTemplateTemplateParmStorage *subst 3153 = Name.getAsSubstTemplateTemplateParm(); 3154 return getCanonicalTemplateName(subst->getReplacement()); 3155 } 3156 3157 case TemplateName::SubstTemplateTemplateParmPack: { 3158 SubstTemplateTemplateParmPackStorage *subst 3159 = Name.getAsSubstTemplateTemplateParmPack(); 3160 TemplateTemplateParmDecl *canonParameter 3161 = getCanonicalTemplateTemplateParmDecl(subst->getParameterPack()); 3162 TemplateArgument canonArgPack 3163 = getCanonicalTemplateArgument(subst->getArgumentPack()); 3164 return getSubstTemplateTemplateParmPack(canonParameter, canonArgPack); 3165 } 3166 } 3167 3168 llvm_unreachable("bad template name!"); 3169} 3170 3171bool ASTContext::hasSameTemplateName(TemplateName X, TemplateName Y) { 3172 X = getCanonicalTemplateName(X); 3173 Y = getCanonicalTemplateName(Y); 3174 return X.getAsVoidPointer() == Y.getAsVoidPointer(); 3175} 3176 3177TemplateArgument 3178ASTContext::getCanonicalTemplateArgument(const TemplateArgument &Arg) const { 3179 switch (Arg.getKind()) { 3180 case TemplateArgument::Null: 3181 return Arg; 3182 3183 case TemplateArgument::Expression: 3184 return Arg; 3185 3186 case TemplateArgument::Declaration: 3187 return TemplateArgument(Arg.getAsDecl()->getCanonicalDecl()); 3188 3189 case TemplateArgument::Template: 3190 return TemplateArgument(getCanonicalTemplateName(Arg.getAsTemplate())); 3191 3192 case TemplateArgument::TemplateExpansion: 3193 return TemplateArgument(getCanonicalTemplateName( 3194 Arg.getAsTemplateOrTemplatePattern()), 3195 Arg.getNumTemplateExpansions()); 3196 3197 case TemplateArgument::Integral: 3198 return TemplateArgument(*Arg.getAsIntegral(), 3199 getCanonicalType(Arg.getIntegralType())); 3200 3201 case TemplateArgument::Type: 3202 return TemplateArgument(getCanonicalType(Arg.getAsType())); 3203 3204 case TemplateArgument::Pack: { 3205 if (Arg.pack_size() == 0) 3206 return Arg; 3207 3208 TemplateArgument *CanonArgs 3209 = new (*this) TemplateArgument[Arg.pack_size()]; 3210 unsigned Idx = 0; 3211 for (TemplateArgument::pack_iterator A = Arg.pack_begin(), 3212 AEnd = Arg.pack_end(); 3213 A != AEnd; (void)++A, ++Idx) 3214 CanonArgs[Idx] = getCanonicalTemplateArgument(*A); 3215 3216 return TemplateArgument(CanonArgs, Arg.pack_size()); 3217 } 3218 } 3219 3220 // Silence GCC warning 3221 assert(false && "Unhandled template argument kind"); 3222 return TemplateArgument(); 3223} 3224 3225NestedNameSpecifier * 3226ASTContext::getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) const { 3227 if (!NNS) 3228 return 0; 3229 3230 switch (NNS->getKind()) { 3231 case NestedNameSpecifier::Identifier: 3232 // Canonicalize the prefix but keep the identifier the same. 3233 return NestedNameSpecifier::Create(*this, 3234 getCanonicalNestedNameSpecifier(NNS->getPrefix()), 3235 NNS->getAsIdentifier()); 3236 3237 case NestedNameSpecifier::Namespace: 3238 // A namespace is canonical; build a nested-name-specifier with 3239 // this namespace and no prefix. 3240 return NestedNameSpecifier::Create(*this, 0, 3241 NNS->getAsNamespace()->getOriginalNamespace()); 3242 3243 case NestedNameSpecifier::NamespaceAlias: 3244 // A namespace is canonical; build a nested-name-specifier with 3245 // this namespace and no prefix. 3246 return NestedNameSpecifier::Create(*this, 0, 3247 NNS->getAsNamespaceAlias()->getNamespace() 3248 ->getOriginalNamespace()); 3249 3250 case NestedNameSpecifier::TypeSpec: 3251 case NestedNameSpecifier::TypeSpecWithTemplate: { 3252 QualType T = getCanonicalType(QualType(NNS->getAsType(), 0)); 3253 3254 // If we have some kind of dependent-named type (e.g., "typename T::type"), 3255 // break it apart into its prefix and identifier, then reconsititute those 3256 // as the canonical nested-name-specifier. This is required to canonicalize 3257 // a dependent nested-name-specifier involving typedefs of dependent-name 3258 // types, e.g., 3259 // typedef typename T::type T1; 3260 // typedef typename T1::type T2; 3261 if (const DependentNameType *DNT = T->getAs<DependentNameType>()) { 3262 NestedNameSpecifier *Prefix 3263 = getCanonicalNestedNameSpecifier(DNT->getQualifier()); 3264 return NestedNameSpecifier::Create(*this, Prefix, 3265 const_cast<IdentifierInfo *>(DNT->getIdentifier())); 3266 } 3267 3268 // Do the same thing as above, but with dependent-named specializations. 3269 if (const DependentTemplateSpecializationType *DTST 3270 = T->getAs<DependentTemplateSpecializationType>()) { 3271 NestedNameSpecifier *Prefix 3272 = getCanonicalNestedNameSpecifier(DTST->getQualifier()); 3273 3274 T = getDependentTemplateSpecializationType(DTST->getKeyword(), 3275 Prefix, DTST->getIdentifier(), 3276 DTST->getNumArgs(), 3277 DTST->getArgs()); 3278 T = getCanonicalType(T); 3279 } 3280 3281 return NestedNameSpecifier::Create(*this, 0, false, 3282 const_cast<Type*>(T.getTypePtr())); 3283 } 3284 3285 case NestedNameSpecifier::Global: 3286 // The global specifier is canonical and unique. 3287 return NNS; 3288 } 3289 3290 // Required to silence a GCC warning 3291 return 0; 3292} 3293 3294 3295const ArrayType *ASTContext::getAsArrayType(QualType T) const { 3296 // Handle the non-qualified case efficiently. 3297 if (!T.hasLocalQualifiers()) { 3298 // Handle the common positive case fast. 3299 if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 3300 return AT; 3301 } 3302 3303 // Handle the common negative case fast. 3304 if (!isa<ArrayType>(T.getCanonicalType())) 3305 return 0; 3306 3307 // Apply any qualifiers from the array type to the element type. This 3308 // implements C99 6.7.3p8: "If the specification of an array type includes 3309 // any type qualifiers, the element type is so qualified, not the array type." 3310 3311 // If we get here, we either have type qualifiers on the type, or we have 3312 // sugar such as a typedef in the way. If we have type qualifiers on the type 3313 // we must propagate them down into the element type. 3314 3315 SplitQualType split = T.getSplitDesugaredType(); 3316 Qualifiers qs = split.second; 3317 3318 // If we have a simple case, just return now. 3319 const ArrayType *ATy = dyn_cast<ArrayType>(split.first); 3320 if (ATy == 0 || qs.empty()) 3321 return ATy; 3322 3323 // Otherwise, we have an array and we have qualifiers on it. Push the 3324 // qualifiers into the array element type and return a new array type. 3325 QualType NewEltTy = getQualifiedType(ATy->getElementType(), qs); 3326 3327 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy)) 3328 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(), 3329 CAT->getSizeModifier(), 3330 CAT->getIndexTypeCVRQualifiers())); 3331 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy)) 3332 return cast<ArrayType>(getIncompleteArrayType(NewEltTy, 3333 IAT->getSizeModifier(), 3334 IAT->getIndexTypeCVRQualifiers())); 3335 3336 if (const DependentSizedArrayType *DSAT 3337 = dyn_cast<DependentSizedArrayType>(ATy)) 3338 return cast<ArrayType>( 3339 getDependentSizedArrayType(NewEltTy, 3340 DSAT->getSizeExpr(), 3341 DSAT->getSizeModifier(), 3342 DSAT->getIndexTypeCVRQualifiers(), 3343 DSAT->getBracketsRange())); 3344 3345 const VariableArrayType *VAT = cast<VariableArrayType>(ATy); 3346 return cast<ArrayType>(getVariableArrayType(NewEltTy, 3347 VAT->getSizeExpr(), 3348 VAT->getSizeModifier(), 3349 VAT->getIndexTypeCVRQualifiers(), 3350 VAT->getBracketsRange())); 3351} 3352 3353QualType ASTContext::getAdjustedParameterType(QualType T) { 3354 // C99 6.7.5.3p7: 3355 // A declaration of a parameter as "array of type" shall be 3356 // adjusted to "qualified pointer to type", where the type 3357 // qualifiers (if any) are those specified within the [ and ] of 3358 // the array type derivation. 3359 if (T->isArrayType()) 3360 return getArrayDecayedType(T); 3361 3362 // C99 6.7.5.3p8: 3363 // A declaration of a parameter as "function returning type" 3364 // shall be adjusted to "pointer to function returning type", as 3365 // in 6.3.2.1. 3366 if (T->isFunctionType()) 3367 return getPointerType(T); 3368 3369 return T; 3370} 3371 3372QualType ASTContext::getSignatureParameterType(QualType T) { 3373 T = getVariableArrayDecayedType(T); 3374 T = getAdjustedParameterType(T); 3375 return T.getUnqualifiedType(); 3376} 3377 3378/// getArrayDecayedType - Return the properly qualified result of decaying the 3379/// specified array type to a pointer. This operation is non-trivial when 3380/// handling typedefs etc. The canonical type of "T" must be an array type, 3381/// this returns a pointer to a properly qualified element of the array. 3382/// 3383/// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 3384QualType ASTContext::getArrayDecayedType(QualType Ty) const { 3385 // Get the element type with 'getAsArrayType' so that we don't lose any 3386 // typedefs in the element type of the array. This also handles propagation 3387 // of type qualifiers from the array type into the element type if present 3388 // (C99 6.7.3p8). 3389 const ArrayType *PrettyArrayType = getAsArrayType(Ty); 3390 assert(PrettyArrayType && "Not an array type!"); 3391 3392 QualType PtrTy = getPointerType(PrettyArrayType->getElementType()); 3393 3394 // int x[restrict 4] -> int *restrict 3395 return getQualifiedType(PtrTy, PrettyArrayType->getIndexTypeQualifiers()); 3396} 3397 3398QualType ASTContext::getBaseElementType(const ArrayType *array) const { 3399 return getBaseElementType(array->getElementType()); 3400} 3401 3402QualType ASTContext::getBaseElementType(QualType type) const { 3403 Qualifiers qs; 3404 while (true) { 3405 SplitQualType split = type.getSplitDesugaredType(); 3406 const ArrayType *array = split.first->getAsArrayTypeUnsafe(); 3407 if (!array) break; 3408 3409 type = array->getElementType(); 3410 qs.addConsistentQualifiers(split.second); 3411 } 3412 3413 return getQualifiedType(type, qs); 3414} 3415 3416/// getConstantArrayElementCount - Returns number of constant array elements. 3417uint64_t 3418ASTContext::getConstantArrayElementCount(const ConstantArrayType *CA) const { 3419 uint64_t ElementCount = 1; 3420 do { 3421 ElementCount *= CA->getSize().getZExtValue(); 3422 CA = dyn_cast<ConstantArrayType>(CA->getElementType()); 3423 } while (CA); 3424 return ElementCount; 3425} 3426 3427/// getFloatingRank - Return a relative rank for floating point types. 3428/// This routine will assert if passed a built-in type that isn't a float. 3429static FloatingRank getFloatingRank(QualType T) { 3430 if (const ComplexType *CT = T->getAs<ComplexType>()) 3431 return getFloatingRank(CT->getElementType()); 3432 3433 assert(T->getAs<BuiltinType>() && "getFloatingRank(): not a floating type"); 3434 switch (T->getAs<BuiltinType>()->getKind()) { 3435 default: assert(0 && "getFloatingRank(): not a floating type"); 3436 case BuiltinType::Float: return FloatRank; 3437 case BuiltinType::Double: return DoubleRank; 3438 case BuiltinType::LongDouble: return LongDoubleRank; 3439 } 3440} 3441 3442/// getFloatingTypeOfSizeWithinDomain - Returns a real floating 3443/// point or a complex type (based on typeDomain/typeSize). 3444/// 'typeDomain' is a real floating point or complex type. 3445/// 'typeSize' is a real floating point or complex type. 3446QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size, 3447 QualType Domain) const { 3448 FloatingRank EltRank = getFloatingRank(Size); 3449 if (Domain->isComplexType()) { 3450 switch (EltRank) { 3451 default: assert(0 && "getFloatingRank(): illegal value for rank"); 3452 case FloatRank: return FloatComplexTy; 3453 case DoubleRank: return DoubleComplexTy; 3454 case LongDoubleRank: return LongDoubleComplexTy; 3455 } 3456 } 3457 3458 assert(Domain->isRealFloatingType() && "Unknown domain!"); 3459 switch (EltRank) { 3460 default: assert(0 && "getFloatingRank(): illegal value for rank"); 3461 case FloatRank: return FloatTy; 3462 case DoubleRank: return DoubleTy; 3463 case LongDoubleRank: return LongDoubleTy; 3464 } 3465} 3466 3467/// getFloatingTypeOrder - Compare the rank of the two specified floating 3468/// point types, ignoring the domain of the type (i.e. 'double' == 3469/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 3470/// LHS < RHS, return -1. 3471int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) const { 3472 FloatingRank LHSR = getFloatingRank(LHS); 3473 FloatingRank RHSR = getFloatingRank(RHS); 3474 3475 if (LHSR == RHSR) 3476 return 0; 3477 if (LHSR > RHSR) 3478 return 1; 3479 return -1; 3480} 3481 3482/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This 3483/// routine will assert if passed a built-in type that isn't an integer or enum, 3484/// or if it is not canonicalized. 3485unsigned ASTContext::getIntegerRank(const Type *T) const { 3486 assert(T->isCanonicalUnqualified() && "T should be canonicalized"); 3487 if (const EnumType* ET = dyn_cast<EnumType>(T)) 3488 T = ET->getDecl()->getPromotionType().getTypePtr(); 3489 3490 if (T->isSpecificBuiltinType(BuiltinType::WChar_S) || 3491 T->isSpecificBuiltinType(BuiltinType::WChar_U)) 3492 T = getFromTargetType(Target->getWCharType()).getTypePtr(); 3493 3494 if (T->isSpecificBuiltinType(BuiltinType::Char16)) 3495 T = getFromTargetType(Target->getChar16Type()).getTypePtr(); 3496 3497 if (T->isSpecificBuiltinType(BuiltinType::Char32)) 3498 T = getFromTargetType(Target->getChar32Type()).getTypePtr(); 3499 3500 switch (cast<BuiltinType>(T)->getKind()) { 3501 default: assert(0 && "getIntegerRank(): not a built-in integer"); 3502 case BuiltinType::Bool: 3503 return 1 + (getIntWidth(BoolTy) << 3); 3504 case BuiltinType::Char_S: 3505 case BuiltinType::Char_U: 3506 case BuiltinType::SChar: 3507 case BuiltinType::UChar: 3508 return 2 + (getIntWidth(CharTy) << 3); 3509 case BuiltinType::Short: 3510 case BuiltinType::UShort: 3511 return 3 + (getIntWidth(ShortTy) << 3); 3512 case BuiltinType::Int: 3513 case BuiltinType::UInt: 3514 return 4 + (getIntWidth(IntTy) << 3); 3515 case BuiltinType::Long: 3516 case BuiltinType::ULong: 3517 return 5 + (getIntWidth(LongTy) << 3); 3518 case BuiltinType::LongLong: 3519 case BuiltinType::ULongLong: 3520 return 6 + (getIntWidth(LongLongTy) << 3); 3521 case BuiltinType::Int128: 3522 case BuiltinType::UInt128: 3523 return 7 + (getIntWidth(Int128Ty) << 3); 3524 } 3525} 3526 3527/// \brief Whether this is a promotable bitfield reference according 3528/// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 3529/// 3530/// \returns the type this bit-field will promote to, or NULL if no 3531/// promotion occurs. 3532QualType ASTContext::isPromotableBitField(Expr *E) const { 3533 if (E->isTypeDependent() || E->isValueDependent()) 3534 return QualType(); 3535 3536 FieldDecl *Field = E->getBitField(); 3537 if (!Field) 3538 return QualType(); 3539 3540 QualType FT = Field->getType(); 3541 3542 llvm::APSInt BitWidthAP = Field->getBitWidth()->EvaluateAsInt(*this); 3543 uint64_t BitWidth = BitWidthAP.getZExtValue(); 3544 uint64_t IntSize = getTypeSize(IntTy); 3545 // GCC extension compatibility: if the bit-field size is less than or equal 3546 // to the size of int, it gets promoted no matter what its type is. 3547 // For instance, unsigned long bf : 4 gets promoted to signed int. 3548 if (BitWidth < IntSize) 3549 return IntTy; 3550 3551 if (BitWidth == IntSize) 3552 return FT->isSignedIntegerType() ? IntTy : UnsignedIntTy; 3553 3554 // Types bigger than int are not subject to promotions, and therefore act 3555 // like the base type. 3556 // FIXME: This doesn't quite match what gcc does, but what gcc does here 3557 // is ridiculous. 3558 return QualType(); 3559} 3560 3561/// getPromotedIntegerType - Returns the type that Promotable will 3562/// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 3563/// integer type. 3564QualType ASTContext::getPromotedIntegerType(QualType Promotable) const { 3565 assert(!Promotable.isNull()); 3566 assert(Promotable->isPromotableIntegerType()); 3567 if (const EnumType *ET = Promotable->getAs<EnumType>()) 3568 return ET->getDecl()->getPromotionType(); 3569 if (Promotable->isSignedIntegerType()) 3570 return IntTy; 3571 uint64_t PromotableSize = getTypeSize(Promotable); 3572 uint64_t IntSize = getTypeSize(IntTy); 3573 assert(Promotable->isUnsignedIntegerType() && PromotableSize <= IntSize); 3574 return (PromotableSize != IntSize) ? IntTy : UnsignedIntTy; 3575} 3576 3577/// \brief Recurses in pointer/array types until it finds an objc retainable 3578/// type and returns its ownership. 3579Qualifiers::ObjCLifetime ASTContext::getInnerObjCOwnership(QualType T) const { 3580 while (!T.isNull()) { 3581 if (T.getObjCLifetime() != Qualifiers::OCL_None) 3582 return T.getObjCLifetime(); 3583 if (T->isArrayType()) 3584 T = getBaseElementType(T); 3585 else if (const PointerType *PT = T->getAs<PointerType>()) 3586 T = PT->getPointeeType(); 3587 else if (const ReferenceType *RT = T->getAs<ReferenceType>()) 3588 T = RT->getPointeeType(); 3589 else 3590 break; 3591 } 3592 3593 return Qualifiers::OCL_None; 3594} 3595 3596/// getIntegerTypeOrder - Returns the highest ranked integer type: 3597/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 3598/// LHS < RHS, return -1. 3599int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) const { 3600 const Type *LHSC = getCanonicalType(LHS).getTypePtr(); 3601 const Type *RHSC = getCanonicalType(RHS).getTypePtr(); 3602 if (LHSC == RHSC) return 0; 3603 3604 bool LHSUnsigned = LHSC->isUnsignedIntegerType(); 3605 bool RHSUnsigned = RHSC->isUnsignedIntegerType(); 3606 3607 unsigned LHSRank = getIntegerRank(LHSC); 3608 unsigned RHSRank = getIntegerRank(RHSC); 3609 3610 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned. 3611 if (LHSRank == RHSRank) return 0; 3612 return LHSRank > RHSRank ? 1 : -1; 3613 } 3614 3615 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa. 3616 if (LHSUnsigned) { 3617 // If the unsigned [LHS] type is larger, return it. 3618 if (LHSRank >= RHSRank) 3619 return 1; 3620 3621 // If the signed type can represent all values of the unsigned type, it 3622 // wins. Because we are dealing with 2's complement and types that are 3623 // powers of two larger than each other, this is always safe. 3624 return -1; 3625 } 3626 3627 // If the unsigned [RHS] type is larger, return it. 3628 if (RHSRank >= LHSRank) 3629 return -1; 3630 3631 // If the signed type can represent all values of the unsigned type, it 3632 // wins. Because we are dealing with 2's complement and types that are 3633 // powers of two larger than each other, this is always safe. 3634 return 1; 3635} 3636 3637static RecordDecl * 3638CreateRecordDecl(const ASTContext &Ctx, RecordDecl::TagKind TK, 3639 DeclContext *DC, IdentifierInfo *Id) { 3640 SourceLocation Loc; 3641 if (Ctx.getLangOptions().CPlusPlus) 3642 return CXXRecordDecl::Create(Ctx, TK, DC, Loc, Loc, Id); 3643 else 3644 return RecordDecl::Create(Ctx, TK, DC, Loc, Loc, Id); 3645} 3646 3647// getCFConstantStringType - Return the type used for constant CFStrings. 3648QualType ASTContext::getCFConstantStringType() const { 3649 if (!CFConstantStringTypeDecl) { 3650 CFConstantStringTypeDecl = 3651 CreateRecordDecl(*this, TTK_Struct, TUDecl, 3652 &Idents.get("NSConstantString")); 3653 CFConstantStringTypeDecl->startDefinition(); 3654 3655 QualType FieldTypes[4]; 3656 3657 // const int *isa; 3658 FieldTypes[0] = getPointerType(IntTy.withConst()); 3659 // int flags; 3660 FieldTypes[1] = IntTy; 3661 // const char *str; 3662 FieldTypes[2] = getPointerType(CharTy.withConst()); 3663 // long length; 3664 FieldTypes[3] = LongTy; 3665 3666 // Create fields 3667 for (unsigned i = 0; i < 4; ++i) { 3668 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl, 3669 SourceLocation(), 3670 SourceLocation(), 0, 3671 FieldTypes[i], /*TInfo=*/0, 3672 /*BitWidth=*/0, 3673 /*Mutable=*/false, 3674 /*HasInit=*/false); 3675 Field->setAccess(AS_public); 3676 CFConstantStringTypeDecl->addDecl(Field); 3677 } 3678 3679 CFConstantStringTypeDecl->completeDefinition(); 3680 } 3681 3682 return getTagDeclType(CFConstantStringTypeDecl); 3683} 3684 3685void ASTContext::setCFConstantStringType(QualType T) { 3686 const RecordType *Rec = T->getAs<RecordType>(); 3687 assert(Rec && "Invalid CFConstantStringType"); 3688 CFConstantStringTypeDecl = Rec->getDecl(); 3689} 3690 3691QualType ASTContext::getBlockDescriptorType() const { 3692 if (BlockDescriptorType) 3693 return getTagDeclType(BlockDescriptorType); 3694 3695 RecordDecl *T; 3696 // FIXME: Needs the FlagAppleBlock bit. 3697 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, 3698 &Idents.get("__block_descriptor")); 3699 T->startDefinition(); 3700 3701 QualType FieldTypes[] = { 3702 UnsignedLongTy, 3703 UnsignedLongTy, 3704 }; 3705 3706 const char *FieldNames[] = { 3707 "reserved", 3708 "Size" 3709 }; 3710 3711 for (size_t i = 0; i < 2; ++i) { 3712 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3713 SourceLocation(), 3714 &Idents.get(FieldNames[i]), 3715 FieldTypes[i], /*TInfo=*/0, 3716 /*BitWidth=*/0, 3717 /*Mutable=*/false, 3718 /*HasInit=*/false); 3719 Field->setAccess(AS_public); 3720 T->addDecl(Field); 3721 } 3722 3723 T->completeDefinition(); 3724 3725 BlockDescriptorType = T; 3726 3727 return getTagDeclType(BlockDescriptorType); 3728} 3729 3730QualType ASTContext::getBlockDescriptorExtendedType() const { 3731 if (BlockDescriptorExtendedType) 3732 return getTagDeclType(BlockDescriptorExtendedType); 3733 3734 RecordDecl *T; 3735 // FIXME: Needs the FlagAppleBlock bit. 3736 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, 3737 &Idents.get("__block_descriptor_withcopydispose")); 3738 T->startDefinition(); 3739 3740 QualType FieldTypes[] = { 3741 UnsignedLongTy, 3742 UnsignedLongTy, 3743 getPointerType(VoidPtrTy), 3744 getPointerType(VoidPtrTy) 3745 }; 3746 3747 const char *FieldNames[] = { 3748 "reserved", 3749 "Size", 3750 "CopyFuncPtr", 3751 "DestroyFuncPtr" 3752 }; 3753 3754 for (size_t i = 0; i < 4; ++i) { 3755 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3756 SourceLocation(), 3757 &Idents.get(FieldNames[i]), 3758 FieldTypes[i], /*TInfo=*/0, 3759 /*BitWidth=*/0, 3760 /*Mutable=*/false, 3761 /*HasInit=*/false); 3762 Field->setAccess(AS_public); 3763 T->addDecl(Field); 3764 } 3765 3766 T->completeDefinition(); 3767 3768 BlockDescriptorExtendedType = T; 3769 3770 return getTagDeclType(BlockDescriptorExtendedType); 3771} 3772 3773bool ASTContext::BlockRequiresCopying(QualType Ty) const { 3774 if (Ty->isObjCRetainableType()) 3775 return true; 3776 if (getLangOptions().CPlusPlus) { 3777 if (const RecordType *RT = Ty->getAs<RecordType>()) { 3778 CXXRecordDecl *RD = cast<CXXRecordDecl>(RT->getDecl()); 3779 return RD->hasConstCopyConstructor(); 3780 3781 } 3782 } 3783 return false; 3784} 3785 3786QualType 3787ASTContext::BuildByRefType(StringRef DeclName, QualType Ty) const { 3788 // type = struct __Block_byref_1_X { 3789 // void *__isa; 3790 // struct __Block_byref_1_X *__forwarding; 3791 // unsigned int __flags; 3792 // unsigned int __size; 3793 // void *__copy_helper; // as needed 3794 // void *__destroy_help // as needed 3795 // int X; 3796 // } * 3797 3798 bool HasCopyAndDispose = BlockRequiresCopying(Ty); 3799 3800 // FIXME: Move up 3801 llvm::SmallString<36> Name; 3802 llvm::raw_svector_ostream(Name) << "__Block_byref_" << 3803 ++UniqueBlockByRefTypeID << '_' << DeclName; 3804 RecordDecl *T; 3805 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, &Idents.get(Name.str())); 3806 T->startDefinition(); 3807 QualType Int32Ty = IntTy; 3808 assert(getIntWidth(IntTy) == 32 && "non-32bit int not supported"); 3809 QualType FieldTypes[] = { 3810 getPointerType(VoidPtrTy), 3811 getPointerType(getTagDeclType(T)), 3812 Int32Ty, 3813 Int32Ty, 3814 getPointerType(VoidPtrTy), 3815 getPointerType(VoidPtrTy), 3816 Ty 3817 }; 3818 3819 StringRef FieldNames[] = { 3820 "__isa", 3821 "__forwarding", 3822 "__flags", 3823 "__size", 3824 "__copy_helper", 3825 "__destroy_helper", 3826 DeclName, 3827 }; 3828 3829 for (size_t i = 0; i < 7; ++i) { 3830 if (!HasCopyAndDispose && i >=4 && i <= 5) 3831 continue; 3832 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3833 SourceLocation(), 3834 &Idents.get(FieldNames[i]), 3835 FieldTypes[i], /*TInfo=*/0, 3836 /*BitWidth=*/0, /*Mutable=*/false, 3837 /*HasInit=*/false); 3838 Field->setAccess(AS_public); 3839 T->addDecl(Field); 3840 } 3841 3842 T->completeDefinition(); 3843 3844 return getPointerType(getTagDeclType(T)); 3845} 3846 3847TypedefDecl *ASTContext::getObjCInstanceTypeDecl() { 3848 if (!ObjCInstanceTypeDecl) 3849 ObjCInstanceTypeDecl = TypedefDecl::Create(*this, 3850 getTranslationUnitDecl(), 3851 SourceLocation(), 3852 SourceLocation(), 3853 &Idents.get("instancetype"), 3854 getTrivialTypeSourceInfo(getObjCIdType())); 3855 return ObjCInstanceTypeDecl; 3856} 3857 3858// This returns true if a type has been typedefed to BOOL: 3859// typedef <type> BOOL; 3860static bool isTypeTypedefedAsBOOL(QualType T) { 3861 if (const TypedefType *TT = dyn_cast<TypedefType>(T)) 3862 if (IdentifierInfo *II = TT->getDecl()->getIdentifier()) 3863 return II->isStr("BOOL"); 3864 3865 return false; 3866} 3867 3868/// getObjCEncodingTypeSize returns size of type for objective-c encoding 3869/// purpose. 3870CharUnits ASTContext::getObjCEncodingTypeSize(QualType type) const { 3871 if (!type->isIncompleteArrayType() && type->isIncompleteType()) 3872 return CharUnits::Zero(); 3873 3874 CharUnits sz = getTypeSizeInChars(type); 3875 3876 // Make all integer and enum types at least as large as an int 3877 if (sz.isPositive() && type->isIntegralOrEnumerationType()) 3878 sz = std::max(sz, getTypeSizeInChars(IntTy)); 3879 // Treat arrays as pointers, since that's how they're passed in. 3880 else if (type->isArrayType()) 3881 sz = getTypeSizeInChars(VoidPtrTy); 3882 return sz; 3883} 3884 3885static inline 3886std::string charUnitsToString(const CharUnits &CU) { 3887 return llvm::itostr(CU.getQuantity()); 3888} 3889 3890/// getObjCEncodingForBlock - Return the encoded type for this block 3891/// declaration. 3892std::string ASTContext::getObjCEncodingForBlock(const BlockExpr *Expr) const { 3893 std::string S; 3894 3895 const BlockDecl *Decl = Expr->getBlockDecl(); 3896 QualType BlockTy = 3897 Expr->getType()->getAs<BlockPointerType>()->getPointeeType(); 3898 // Encode result type. 3899 getObjCEncodingForType(BlockTy->getAs<FunctionType>()->getResultType(), S); 3900 // Compute size of all parameters. 3901 // Start with computing size of a pointer in number of bytes. 3902 // FIXME: There might(should) be a better way of doing this computation! 3903 SourceLocation Loc; 3904 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3905 CharUnits ParmOffset = PtrSize; 3906 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), 3907 E = Decl->param_end(); PI != E; ++PI) { 3908 QualType PType = (*PI)->getType(); 3909 CharUnits sz = getObjCEncodingTypeSize(PType); 3910 assert (sz.isPositive() && "BlockExpr - Incomplete param type"); 3911 ParmOffset += sz; 3912 } 3913 // Size of the argument frame 3914 S += charUnitsToString(ParmOffset); 3915 // Block pointer and offset. 3916 S += "@?0"; 3917 3918 // Argument types. 3919 ParmOffset = PtrSize; 3920 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), E = 3921 Decl->param_end(); PI != E; ++PI) { 3922 ParmVarDecl *PVDecl = *PI; 3923 QualType PType = PVDecl->getOriginalType(); 3924 if (const ArrayType *AT = 3925 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3926 // Use array's original type only if it has known number of 3927 // elements. 3928 if (!isa<ConstantArrayType>(AT)) 3929 PType = PVDecl->getType(); 3930 } else if (PType->isFunctionType()) 3931 PType = PVDecl->getType(); 3932 getObjCEncodingForType(PType, S); 3933 S += charUnitsToString(ParmOffset); 3934 ParmOffset += getObjCEncodingTypeSize(PType); 3935 } 3936 3937 return S; 3938} 3939 3940bool ASTContext::getObjCEncodingForFunctionDecl(const FunctionDecl *Decl, 3941 std::string& S) { 3942 // Encode result type. 3943 getObjCEncodingForType(Decl->getResultType(), S); 3944 CharUnits ParmOffset; 3945 // Compute size of all parameters. 3946 for (FunctionDecl::param_const_iterator PI = Decl->param_begin(), 3947 E = Decl->param_end(); PI != E; ++PI) { 3948 QualType PType = (*PI)->getType(); 3949 CharUnits sz = getObjCEncodingTypeSize(PType); 3950 if (sz.isZero()) 3951 return true; 3952 3953 assert (sz.isPositive() && 3954 "getObjCEncodingForFunctionDecl - Incomplete param type"); 3955 ParmOffset += sz; 3956 } 3957 S += charUnitsToString(ParmOffset); 3958 ParmOffset = CharUnits::Zero(); 3959 3960 // Argument types. 3961 for (FunctionDecl::param_const_iterator PI = Decl->param_begin(), 3962 E = Decl->param_end(); PI != E; ++PI) { 3963 ParmVarDecl *PVDecl = *PI; 3964 QualType PType = PVDecl->getOriginalType(); 3965 if (const ArrayType *AT = 3966 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3967 // Use array's original type only if it has known number of 3968 // elements. 3969 if (!isa<ConstantArrayType>(AT)) 3970 PType = PVDecl->getType(); 3971 } else if (PType->isFunctionType()) 3972 PType = PVDecl->getType(); 3973 getObjCEncodingForType(PType, S); 3974 S += charUnitsToString(ParmOffset); 3975 ParmOffset += getObjCEncodingTypeSize(PType); 3976 } 3977 3978 return false; 3979} 3980 3981/// getObjCEncodingForMethodDecl - Return the encoded type for this method 3982/// declaration. 3983bool ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, 3984 std::string& S) const { 3985 // FIXME: This is not very efficient. 3986 // Encode type qualifer, 'in', 'inout', etc. for the return type. 3987 getObjCEncodingForTypeQualifier(Decl->getObjCDeclQualifier(), S); 3988 // Encode result type. 3989 getObjCEncodingForType(Decl->getResultType(), S); 3990 // Compute size of all parameters. 3991 // Start with computing size of a pointer in number of bytes. 3992 // FIXME: There might(should) be a better way of doing this computation! 3993 SourceLocation Loc; 3994 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3995 // The first two arguments (self and _cmd) are pointers; account for 3996 // their size. 3997 CharUnits ParmOffset = 2 * PtrSize; 3998 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3999 E = Decl->sel_param_end(); PI != E; ++PI) { 4000 QualType PType = (*PI)->getType(); 4001 CharUnits sz = getObjCEncodingTypeSize(PType); 4002 if (sz.isZero()) 4003 return true; 4004 4005 assert (sz.isPositive() && 4006 "getObjCEncodingForMethodDecl - Incomplete param type"); 4007 ParmOffset += sz; 4008 } 4009 S += charUnitsToString(ParmOffset); 4010 S += "@0:"; 4011 S += charUnitsToString(PtrSize); 4012 4013 // Argument types. 4014 ParmOffset = 2 * PtrSize; 4015 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 4016 E = Decl->sel_param_end(); PI != E; ++PI) { 4017 ParmVarDecl *PVDecl = *PI; 4018 QualType PType = PVDecl->getOriginalType(); 4019 if (const ArrayType *AT = 4020 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 4021 // Use array's original type only if it has known number of 4022 // elements. 4023 if (!isa<ConstantArrayType>(AT)) 4024 PType = PVDecl->getType(); 4025 } else if (PType->isFunctionType()) 4026 PType = PVDecl->getType(); 4027 // Process argument qualifiers for user supplied arguments; such as, 4028 // 'in', 'inout', etc. 4029 getObjCEncodingForTypeQualifier(PVDecl->getObjCDeclQualifier(), S); 4030 getObjCEncodingForType(PType, S); 4031 S += charUnitsToString(ParmOffset); 4032 ParmOffset += getObjCEncodingTypeSize(PType); 4033 } 4034 4035 return false; 4036} 4037 4038/// getObjCEncodingForPropertyDecl - Return the encoded type for this 4039/// property declaration. If non-NULL, Container must be either an 4040/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be 4041/// NULL when getting encodings for protocol properties. 4042/// Property attributes are stored as a comma-delimited C string. The simple 4043/// attributes readonly and bycopy are encoded as single characters. The 4044/// parametrized attributes, getter=name, setter=name, and ivar=name, are 4045/// encoded as single characters, followed by an identifier. Property types 4046/// are also encoded as a parametrized attribute. The characters used to encode 4047/// these attributes are defined by the following enumeration: 4048/// @code 4049/// enum PropertyAttributes { 4050/// kPropertyReadOnly = 'R', // property is read-only. 4051/// kPropertyBycopy = 'C', // property is a copy of the value last assigned 4052/// kPropertyByref = '&', // property is a reference to the value last assigned 4053/// kPropertyDynamic = 'D', // property is dynamic 4054/// kPropertyGetter = 'G', // followed by getter selector name 4055/// kPropertySetter = 'S', // followed by setter selector name 4056/// kPropertyInstanceVariable = 'V' // followed by instance variable name 4057/// kPropertyType = 't' // followed by old-style type encoding. 4058/// kPropertyWeak = 'W' // 'weak' property 4059/// kPropertyStrong = 'P' // property GC'able 4060/// kPropertyNonAtomic = 'N' // property non-atomic 4061/// }; 4062/// @endcode 4063void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 4064 const Decl *Container, 4065 std::string& S) const { 4066 // Collect information from the property implementation decl(s). 4067 bool Dynamic = false; 4068 ObjCPropertyImplDecl *SynthesizePID = 0; 4069 4070 // FIXME: Duplicated code due to poor abstraction. 4071 if (Container) { 4072 if (const ObjCCategoryImplDecl *CID = 4073 dyn_cast<ObjCCategoryImplDecl>(Container)) { 4074 for (ObjCCategoryImplDecl::propimpl_iterator 4075 i = CID->propimpl_begin(), e = CID->propimpl_end(); 4076 i != e; ++i) { 4077 ObjCPropertyImplDecl *PID = *i; 4078 if (PID->getPropertyDecl() == PD) { 4079 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 4080 Dynamic = true; 4081 } else { 4082 SynthesizePID = PID; 4083 } 4084 } 4085 } 4086 } else { 4087 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container); 4088 for (ObjCCategoryImplDecl::propimpl_iterator 4089 i = OID->propimpl_begin(), e = OID->propimpl_end(); 4090 i != e; ++i) { 4091 ObjCPropertyImplDecl *PID = *i; 4092 if (PID->getPropertyDecl() == PD) { 4093 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 4094 Dynamic = true; 4095 } else { 4096 SynthesizePID = PID; 4097 } 4098 } 4099 } 4100 } 4101 } 4102 4103 // FIXME: This is not very efficient. 4104 S = "T"; 4105 4106 // Encode result type. 4107 // GCC has some special rules regarding encoding of properties which 4108 // closely resembles encoding of ivars. 4109 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, 0, 4110 true /* outermost type */, 4111 true /* encoding for property */); 4112 4113 if (PD->isReadOnly()) { 4114 S += ",R"; 4115 } else { 4116 switch (PD->getSetterKind()) { 4117 case ObjCPropertyDecl::Assign: break; 4118 case ObjCPropertyDecl::Copy: S += ",C"; break; 4119 case ObjCPropertyDecl::Retain: S += ",&"; break; 4120 case ObjCPropertyDecl::Weak: S += ",W"; break; 4121 } 4122 } 4123 4124 // It really isn't clear at all what this means, since properties 4125 // are "dynamic by default". 4126 if (Dynamic) 4127 S += ",D"; 4128 4129 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) 4130 S += ",N"; 4131 4132 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) { 4133 S += ",G"; 4134 S += PD->getGetterName().getAsString(); 4135 } 4136 4137 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) { 4138 S += ",S"; 4139 S += PD->getSetterName().getAsString(); 4140 } 4141 4142 if (SynthesizePID) { 4143 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl(); 4144 S += ",V"; 4145 S += OID->getNameAsString(); 4146 } 4147 4148 // FIXME: OBJCGC: weak & strong 4149} 4150 4151/// getLegacyIntegralTypeEncoding - 4152/// Another legacy compatibility encoding: 32-bit longs are encoded as 4153/// 'l' or 'L' , but not always. For typedefs, we need to use 4154/// 'i' or 'I' instead if encoding a struct field, or a pointer! 4155/// 4156void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const { 4157 if (isa<TypedefType>(PointeeTy.getTypePtr())) { 4158 if (const BuiltinType *BT = PointeeTy->getAs<BuiltinType>()) { 4159 if (BT->getKind() == BuiltinType::ULong && getIntWidth(PointeeTy) == 32) 4160 PointeeTy = UnsignedIntTy; 4161 else 4162 if (BT->getKind() == BuiltinType::Long && getIntWidth(PointeeTy) == 32) 4163 PointeeTy = IntTy; 4164 } 4165 } 4166} 4167 4168void ASTContext::getObjCEncodingForType(QualType T, std::string& S, 4169 const FieldDecl *Field) const { 4170 // We follow the behavior of gcc, expanding structures which are 4171 // directly pointed to, and expanding embedded structures. Note that 4172 // these rules are sufficient to prevent recursive encoding of the 4173 // same type. 4174 getObjCEncodingForTypeImpl(T, S, true, true, Field, 4175 true /* outermost type */); 4176} 4177 4178static char ObjCEncodingForPrimitiveKind(const ASTContext *C, QualType T) { 4179 switch (T->getAs<BuiltinType>()->getKind()) { 4180 default: assert(0 && "Unhandled builtin type kind"); 4181 case BuiltinType::Void: return 'v'; 4182 case BuiltinType::Bool: return 'B'; 4183 case BuiltinType::Char_U: 4184 case BuiltinType::UChar: return 'C'; 4185 case BuiltinType::UShort: return 'S'; 4186 case BuiltinType::UInt: return 'I'; 4187 case BuiltinType::ULong: 4188 return C->getIntWidth(T) == 32 ? 'L' : 'Q'; 4189 case BuiltinType::UInt128: return 'T'; 4190 case BuiltinType::ULongLong: return 'Q'; 4191 case BuiltinType::Char_S: 4192 case BuiltinType::SChar: return 'c'; 4193 case BuiltinType::Short: return 's'; 4194 case BuiltinType::WChar_S: 4195 case BuiltinType::WChar_U: 4196 case BuiltinType::Int: return 'i'; 4197 case BuiltinType::Long: 4198 return C->getIntWidth(T) == 32 ? 'l' : 'q'; 4199 case BuiltinType::LongLong: return 'q'; 4200 case BuiltinType::Int128: return 't'; 4201 case BuiltinType::Float: return 'f'; 4202 case BuiltinType::Double: return 'd'; 4203 case BuiltinType::LongDouble: return 'D'; 4204 } 4205} 4206 4207static char ObjCEncodingForEnumType(const ASTContext *C, const EnumType *ET) { 4208 EnumDecl *Enum = ET->getDecl(); 4209 4210 // The encoding of an non-fixed enum type is always 'i', regardless of size. 4211 if (!Enum->isFixed()) 4212 return 'i'; 4213 4214 // The encoding of a fixed enum type matches its fixed underlying type. 4215 return ObjCEncodingForPrimitiveKind(C, Enum->getIntegerType()); 4216} 4217 4218static void EncodeBitField(const ASTContext *Ctx, std::string& S, 4219 QualType T, const FieldDecl *FD) { 4220 const Expr *E = FD->getBitWidth(); 4221 assert(E && "bitfield width not there - getObjCEncodingForTypeImpl"); 4222 S += 'b'; 4223 // The NeXT runtime encodes bit fields as b followed by the number of bits. 4224 // The GNU runtime requires more information; bitfields are encoded as b, 4225 // then the offset (in bits) of the first element, then the type of the 4226 // bitfield, then the size in bits. For example, in this structure: 4227 // 4228 // struct 4229 // { 4230 // int integer; 4231 // int flags:2; 4232 // }; 4233 // On a 32-bit system, the encoding for flags would be b2 for the NeXT 4234 // runtime, but b32i2 for the GNU runtime. The reason for this extra 4235 // information is not especially sensible, but we're stuck with it for 4236 // compatibility with GCC, although providing it breaks anything that 4237 // actually uses runtime introspection and wants to work on both runtimes... 4238 if (!Ctx->getLangOptions().NeXTRuntime) { 4239 const RecordDecl *RD = FD->getParent(); 4240 const ASTRecordLayout &RL = Ctx->getASTRecordLayout(RD); 4241 S += llvm::utostr(RL.getFieldOffset(FD->getFieldIndex())); 4242 if (const EnumType *ET = T->getAs<EnumType>()) 4243 S += ObjCEncodingForEnumType(Ctx, ET); 4244 else 4245 S += ObjCEncodingForPrimitiveKind(Ctx, T); 4246 } 4247 unsigned N = E->EvaluateAsInt(*Ctx).getZExtValue(); 4248 S += llvm::utostr(N); 4249} 4250 4251// FIXME: Use SmallString for accumulating string. 4252void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S, 4253 bool ExpandPointedToStructures, 4254 bool ExpandStructures, 4255 const FieldDecl *FD, 4256 bool OutermostType, 4257 bool EncodingProperty, 4258 bool StructField) const { 4259 if (T->getAs<BuiltinType>()) { 4260 if (FD && FD->isBitField()) 4261 return EncodeBitField(this, S, T, FD); 4262 S += ObjCEncodingForPrimitiveKind(this, T); 4263 return; 4264 } 4265 4266 if (const ComplexType *CT = T->getAs<ComplexType>()) { 4267 S += 'j'; 4268 getObjCEncodingForTypeImpl(CT->getElementType(), S, false, false, 0, false, 4269 false); 4270 return; 4271 } 4272 4273 // encoding for pointer or r3eference types. 4274 QualType PointeeTy; 4275 if (const PointerType *PT = T->getAs<PointerType>()) { 4276 if (PT->isObjCSelType()) { 4277 S += ':'; 4278 return; 4279 } 4280 PointeeTy = PT->getPointeeType(); 4281 } 4282 else if (const ReferenceType *RT = T->getAs<ReferenceType>()) 4283 PointeeTy = RT->getPointeeType(); 4284 if (!PointeeTy.isNull()) { 4285 bool isReadOnly = false; 4286 // For historical/compatibility reasons, the read-only qualifier of the 4287 // pointee gets emitted _before_ the '^'. The read-only qualifier of 4288 // the pointer itself gets ignored, _unless_ we are looking at a typedef! 4289 // Also, do not emit the 'r' for anything but the outermost type! 4290 if (isa<TypedefType>(T.getTypePtr())) { 4291 if (OutermostType && T.isConstQualified()) { 4292 isReadOnly = true; 4293 S += 'r'; 4294 } 4295 } else if (OutermostType) { 4296 QualType P = PointeeTy; 4297 while (P->getAs<PointerType>()) 4298 P = P->getAs<PointerType>()->getPointeeType(); 4299 if (P.isConstQualified()) { 4300 isReadOnly = true; 4301 S += 'r'; 4302 } 4303 } 4304 if (isReadOnly) { 4305 // Another legacy compatibility encoding. Some ObjC qualifier and type 4306 // combinations need to be rearranged. 4307 // Rewrite "in const" from "nr" to "rn" 4308 if (StringRef(S).endswith("nr")) 4309 S.replace(S.end()-2, S.end(), "rn"); 4310 } 4311 4312 if (PointeeTy->isCharType()) { 4313 // char pointer types should be encoded as '*' unless it is a 4314 // type that has been typedef'd to 'BOOL'. 4315 if (!isTypeTypedefedAsBOOL(PointeeTy)) { 4316 S += '*'; 4317 return; 4318 } 4319 } else if (const RecordType *RTy = PointeeTy->getAs<RecordType>()) { 4320 // GCC binary compat: Need to convert "struct objc_class *" to "#". 4321 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_class")) { 4322 S += '#'; 4323 return; 4324 } 4325 // GCC binary compat: Need to convert "struct objc_object *" to "@". 4326 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_object")) { 4327 S += '@'; 4328 return; 4329 } 4330 // fall through... 4331 } 4332 S += '^'; 4333 getLegacyIntegralTypeEncoding(PointeeTy); 4334 4335 getObjCEncodingForTypeImpl(PointeeTy, S, false, ExpandPointedToStructures, 4336 NULL); 4337 return; 4338 } 4339 4340 if (const ArrayType *AT = 4341 // Ignore type qualifiers etc. 4342 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) { 4343 if (isa<IncompleteArrayType>(AT) && !StructField) { 4344 // Incomplete arrays are encoded as a pointer to the array element. 4345 S += '^'; 4346 4347 getObjCEncodingForTypeImpl(AT->getElementType(), S, 4348 false, ExpandStructures, FD); 4349 } else { 4350 S += '['; 4351 4352 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) { 4353 if (getTypeSize(CAT->getElementType()) == 0) 4354 S += '0'; 4355 else 4356 S += llvm::utostr(CAT->getSize().getZExtValue()); 4357 } else { 4358 //Variable length arrays are encoded as a regular array with 0 elements. 4359 assert((isa<VariableArrayType>(AT) || isa<IncompleteArrayType>(AT)) && 4360 "Unknown array type!"); 4361 S += '0'; 4362 } 4363 4364 getObjCEncodingForTypeImpl(AT->getElementType(), S, 4365 false, ExpandStructures, FD); 4366 S += ']'; 4367 } 4368 return; 4369 } 4370 4371 if (T->getAs<FunctionType>()) { 4372 S += '?'; 4373 return; 4374 } 4375 4376 if (const RecordType *RTy = T->getAs<RecordType>()) { 4377 RecordDecl *RDecl = RTy->getDecl(); 4378 S += RDecl->isUnion() ? '(' : '{'; 4379 // Anonymous structures print as '?' 4380 if (const IdentifierInfo *II = RDecl->getIdentifier()) { 4381 S += II->getName(); 4382 if (ClassTemplateSpecializationDecl *Spec 4383 = dyn_cast<ClassTemplateSpecializationDecl>(RDecl)) { 4384 const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs(); 4385 std::string TemplateArgsStr 4386 = TemplateSpecializationType::PrintTemplateArgumentList( 4387 TemplateArgs.data(), 4388 TemplateArgs.size(), 4389 (*this).PrintingPolicy); 4390 4391 S += TemplateArgsStr; 4392 } 4393 } else { 4394 S += '?'; 4395 } 4396 if (ExpandStructures) { 4397 S += '='; 4398 if (!RDecl->isUnion()) { 4399 getObjCEncodingForStructureImpl(RDecl, S, FD); 4400 } else { 4401 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 4402 FieldEnd = RDecl->field_end(); 4403 Field != FieldEnd; ++Field) { 4404 if (FD) { 4405 S += '"'; 4406 S += Field->getNameAsString(); 4407 S += '"'; 4408 } 4409 4410 // Special case bit-fields. 4411 if (Field->isBitField()) { 4412 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, 4413 (*Field)); 4414 } else { 4415 QualType qt = Field->getType(); 4416 getLegacyIntegralTypeEncoding(qt); 4417 getObjCEncodingForTypeImpl(qt, S, false, true, 4418 FD, /*OutermostType*/false, 4419 /*EncodingProperty*/false, 4420 /*StructField*/true); 4421 } 4422 } 4423 } 4424 } 4425 S += RDecl->isUnion() ? ')' : '}'; 4426 return; 4427 } 4428 4429 if (const EnumType *ET = T->getAs<EnumType>()) { 4430 if (FD && FD->isBitField()) 4431 EncodeBitField(this, S, T, FD); 4432 else 4433 S += ObjCEncodingForEnumType(this, ET); 4434 return; 4435 } 4436 4437 if (T->isBlockPointerType()) { 4438 S += "@?"; // Unlike a pointer-to-function, which is "^?". 4439 return; 4440 } 4441 4442 // Ignore protocol qualifiers when mangling at this level. 4443 if (const ObjCObjectType *OT = T->getAs<ObjCObjectType>()) 4444 T = OT->getBaseType(); 4445 4446 if (const ObjCInterfaceType *OIT = T->getAs<ObjCInterfaceType>()) { 4447 // @encode(class_name) 4448 ObjCInterfaceDecl *OI = OIT->getDecl(); 4449 S += '{'; 4450 const IdentifierInfo *II = OI->getIdentifier(); 4451 S += II->getName(); 4452 S += '='; 4453 SmallVector<const ObjCIvarDecl*, 32> Ivars; 4454 DeepCollectObjCIvars(OI, true, Ivars); 4455 for (unsigned i = 0, e = Ivars.size(); i != e; ++i) { 4456 const FieldDecl *Field = cast<FieldDecl>(Ivars[i]); 4457 if (Field->isBitField()) 4458 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, Field); 4459 else 4460 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, FD); 4461 } 4462 S += '}'; 4463 return; 4464 } 4465 4466 if (const ObjCObjectPointerType *OPT = T->getAs<ObjCObjectPointerType>()) { 4467 if (OPT->isObjCIdType()) { 4468 S += '@'; 4469 return; 4470 } 4471 4472 if (OPT->isObjCClassType() || OPT->isObjCQualifiedClassType()) { 4473 // FIXME: Consider if we need to output qualifiers for 'Class<p>'. 4474 // Since this is a binary compatibility issue, need to consult with runtime 4475 // folks. Fortunately, this is a *very* obsure construct. 4476 S += '#'; 4477 return; 4478 } 4479 4480 if (OPT->isObjCQualifiedIdType()) { 4481 getObjCEncodingForTypeImpl(getObjCIdType(), S, 4482 ExpandPointedToStructures, 4483 ExpandStructures, FD); 4484 if (FD || EncodingProperty) { 4485 // Note that we do extended encoding of protocol qualifer list 4486 // Only when doing ivar or property encoding. 4487 S += '"'; 4488 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 4489 E = OPT->qual_end(); I != E; ++I) { 4490 S += '<'; 4491 S += (*I)->getNameAsString(); 4492 S += '>'; 4493 } 4494 S += '"'; 4495 } 4496 return; 4497 } 4498 4499 QualType PointeeTy = OPT->getPointeeType(); 4500 if (!EncodingProperty && 4501 isa<TypedefType>(PointeeTy.getTypePtr())) { 4502 // Another historical/compatibility reason. 4503 // We encode the underlying type which comes out as 4504 // {...}; 4505 S += '^'; 4506 getObjCEncodingForTypeImpl(PointeeTy, S, 4507 false, ExpandPointedToStructures, 4508 NULL); 4509 return; 4510 } 4511 4512 S += '@'; 4513 if (OPT->getInterfaceDecl() && (FD || EncodingProperty)) { 4514 S += '"'; 4515 S += OPT->getInterfaceDecl()->getIdentifier()->getName(); 4516 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 4517 E = OPT->qual_end(); I != E; ++I) { 4518 S += '<'; 4519 S += (*I)->getNameAsString(); 4520 S += '>'; 4521 } 4522 S += '"'; 4523 } 4524 return; 4525 } 4526 4527 // gcc just blithely ignores member pointers. 4528 // TODO: maybe there should be a mangling for these 4529 if (T->getAs<MemberPointerType>()) 4530 return; 4531 4532 if (T->isVectorType()) { 4533 // This matches gcc's encoding, even though technically it is 4534 // insufficient. 4535 // FIXME. We should do a better job than gcc. 4536 return; 4537 } 4538 4539 assert(0 && "@encode for type not implemented!"); 4540} 4541 4542void ASTContext::getObjCEncodingForStructureImpl(RecordDecl *RDecl, 4543 std::string &S, 4544 const FieldDecl *FD, 4545 bool includeVBases) const { 4546 assert(RDecl && "Expected non-null RecordDecl"); 4547 assert(!RDecl->isUnion() && "Should not be called for unions"); 4548 if (!RDecl->getDefinition()) 4549 return; 4550 4551 CXXRecordDecl *CXXRec = dyn_cast<CXXRecordDecl>(RDecl); 4552 std::multimap<uint64_t, NamedDecl *> FieldOrBaseOffsets; 4553 const ASTRecordLayout &layout = getASTRecordLayout(RDecl); 4554 4555 if (CXXRec) { 4556 for (CXXRecordDecl::base_class_iterator 4557 BI = CXXRec->bases_begin(), 4558 BE = CXXRec->bases_end(); BI != BE; ++BI) { 4559 if (!BI->isVirtual()) { 4560 CXXRecordDecl *base = BI->getType()->getAsCXXRecordDecl(); 4561 if (base->isEmpty()) 4562 continue; 4563 uint64_t offs = layout.getBaseClassOffsetInBits(base); 4564 FieldOrBaseOffsets.insert(FieldOrBaseOffsets.upper_bound(offs), 4565 std::make_pair(offs, base)); 4566 } 4567 } 4568 } 4569 4570 unsigned i = 0; 4571 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 4572 FieldEnd = RDecl->field_end(); 4573 Field != FieldEnd; ++Field, ++i) { 4574 uint64_t offs = layout.getFieldOffset(i); 4575 FieldOrBaseOffsets.insert(FieldOrBaseOffsets.upper_bound(offs), 4576 std::make_pair(offs, *Field)); 4577 } 4578 4579 if (CXXRec && includeVBases) { 4580 for (CXXRecordDecl::base_class_iterator 4581 BI = CXXRec->vbases_begin(), 4582 BE = CXXRec->vbases_end(); BI != BE; ++BI) { 4583 CXXRecordDecl *base = BI->getType()->getAsCXXRecordDecl(); 4584 if (base->isEmpty()) 4585 continue; 4586 uint64_t offs = layout.getVBaseClassOffsetInBits(base); 4587 FieldOrBaseOffsets.insert(FieldOrBaseOffsets.upper_bound(offs), 4588 std::make_pair(offs, base)); 4589 } 4590 } 4591 4592 CharUnits size; 4593 if (CXXRec) { 4594 size = includeVBases ? layout.getSize() : layout.getNonVirtualSize(); 4595 } else { 4596 size = layout.getSize(); 4597 } 4598 4599 uint64_t CurOffs = 0; 4600 std::multimap<uint64_t, NamedDecl *>::iterator 4601 CurLayObj = FieldOrBaseOffsets.begin(); 4602 4603 if ((CurLayObj != FieldOrBaseOffsets.end() && CurLayObj->first != 0) || 4604 (CurLayObj == FieldOrBaseOffsets.end() && 4605 CXXRec && CXXRec->isDynamicClass())) { 4606 assert(CXXRec && CXXRec->isDynamicClass() && 4607 "Offset 0 was empty but no VTable ?"); 4608 if (FD) { 4609 S += "\"_vptr$"; 4610 std::string recname = CXXRec->getNameAsString(); 4611 if (recname.empty()) recname = "?"; 4612 S += recname; 4613 S += '"'; 4614 } 4615 S += "^^?"; 4616 CurOffs += getTypeSize(VoidPtrTy); 4617 } 4618 4619 if (!RDecl->hasFlexibleArrayMember()) { 4620 // Mark the end of the structure. 4621 uint64_t offs = toBits(size); 4622 FieldOrBaseOffsets.insert(FieldOrBaseOffsets.upper_bound(offs), 4623 std::make_pair(offs, (NamedDecl*)0)); 4624 } 4625 4626 for (; CurLayObj != FieldOrBaseOffsets.end(); ++CurLayObj) { 4627 assert(CurOffs <= CurLayObj->first); 4628 4629 if (CurOffs < CurLayObj->first) { 4630 uint64_t padding = CurLayObj->first - CurOffs; 4631 // FIXME: There doesn't seem to be a way to indicate in the encoding that 4632 // packing/alignment of members is different that normal, in which case 4633 // the encoding will be out-of-sync with the real layout. 4634 // If the runtime switches to just consider the size of types without 4635 // taking into account alignment, we could make padding explicit in the 4636 // encoding (e.g. using arrays of chars). The encoding strings would be 4637 // longer then though. 4638 CurOffs += padding; 4639 } 4640 4641 NamedDecl *dcl = CurLayObj->second; 4642 if (dcl == 0) 4643 break; // reached end of structure. 4644 4645 if (CXXRecordDecl *base = dyn_cast<CXXRecordDecl>(dcl)) { 4646 // We expand the bases without their virtual bases since those are going 4647 // in the initial structure. Note that this differs from gcc which 4648 // expands virtual bases each time one is encountered in the hierarchy, 4649 // making the encoding type bigger than it really is. 4650 getObjCEncodingForStructureImpl(base, S, FD, /*includeVBases*/false); 4651 assert(!base->isEmpty()); 4652 CurOffs += toBits(getASTRecordLayout(base).getNonVirtualSize()); 4653 } else { 4654 FieldDecl *field = cast<FieldDecl>(dcl); 4655 if (FD) { 4656 S += '"'; 4657 S += field->getNameAsString(); 4658 S += '"'; 4659 } 4660 4661 if (field->isBitField()) { 4662 EncodeBitField(this, S, field->getType(), field); 4663 CurOffs += field->getBitWidth()->EvaluateAsInt(*this).getZExtValue(); 4664 } else { 4665 QualType qt = field->getType(); 4666 getLegacyIntegralTypeEncoding(qt); 4667 getObjCEncodingForTypeImpl(qt, S, false, true, FD, 4668 /*OutermostType*/false, 4669 /*EncodingProperty*/false, 4670 /*StructField*/true); 4671 CurOffs += getTypeSize(field->getType()); 4672 } 4673 } 4674 } 4675} 4676 4677void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 4678 std::string& S) const { 4679 if (QT & Decl::OBJC_TQ_In) 4680 S += 'n'; 4681 if (QT & Decl::OBJC_TQ_Inout) 4682 S += 'N'; 4683 if (QT & Decl::OBJC_TQ_Out) 4684 S += 'o'; 4685 if (QT & Decl::OBJC_TQ_Bycopy) 4686 S += 'O'; 4687 if (QT & Decl::OBJC_TQ_Byref) 4688 S += 'R'; 4689 if (QT & Decl::OBJC_TQ_Oneway) 4690 S += 'V'; 4691} 4692 4693void ASTContext::setBuiltinVaListType(QualType T) { 4694 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!"); 4695 4696 BuiltinVaListType = T; 4697} 4698 4699TypedefDecl *ASTContext::getObjCIdDecl() const { 4700 if (!ObjCIdDecl) { 4701 QualType T = getObjCObjectType(ObjCBuiltinIdTy, 0, 0); 4702 T = getObjCObjectPointerType(T); 4703 TypeSourceInfo *IdInfo = getTrivialTypeSourceInfo(T); 4704 ObjCIdDecl = TypedefDecl::Create(const_cast<ASTContext &>(*this), 4705 getTranslationUnitDecl(), 4706 SourceLocation(), SourceLocation(), 4707 &Idents.get("id"), IdInfo); 4708 } 4709 4710 return ObjCIdDecl; 4711} 4712 4713TypedefDecl *ASTContext::getObjCSelDecl() const { 4714 if (!ObjCSelDecl) { 4715 QualType SelT = getPointerType(ObjCBuiltinSelTy); 4716 TypeSourceInfo *SelInfo = getTrivialTypeSourceInfo(SelT); 4717 ObjCSelDecl = TypedefDecl::Create(const_cast<ASTContext &>(*this), 4718 getTranslationUnitDecl(), 4719 SourceLocation(), SourceLocation(), 4720 &Idents.get("SEL"), SelInfo); 4721 } 4722 return ObjCSelDecl; 4723} 4724 4725void ASTContext::setObjCProtoType(QualType QT) { 4726 ObjCProtoType = QT; 4727} 4728 4729TypedefDecl *ASTContext::getObjCClassDecl() const { 4730 if (!ObjCClassDecl) { 4731 QualType T = getObjCObjectType(ObjCBuiltinClassTy, 0, 0); 4732 T = getObjCObjectPointerType(T); 4733 TypeSourceInfo *ClassInfo = getTrivialTypeSourceInfo(T); 4734 ObjCClassDecl = TypedefDecl::Create(const_cast<ASTContext &>(*this), 4735 getTranslationUnitDecl(), 4736 SourceLocation(), SourceLocation(), 4737 &Idents.get("Class"), ClassInfo); 4738 } 4739 4740 return ObjCClassDecl; 4741} 4742 4743void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) { 4744 assert(ObjCConstantStringType.isNull() && 4745 "'NSConstantString' type already set!"); 4746 4747 ObjCConstantStringType = getObjCInterfaceType(Decl); 4748} 4749 4750/// \brief Retrieve the template name that corresponds to a non-empty 4751/// lookup. 4752TemplateName 4753ASTContext::getOverloadedTemplateName(UnresolvedSetIterator Begin, 4754 UnresolvedSetIterator End) const { 4755 unsigned size = End - Begin; 4756 assert(size > 1 && "set is not overloaded!"); 4757 4758 void *memory = Allocate(sizeof(OverloadedTemplateStorage) + 4759 size * sizeof(FunctionTemplateDecl*)); 4760 OverloadedTemplateStorage *OT = new(memory) OverloadedTemplateStorage(size); 4761 4762 NamedDecl **Storage = OT->getStorage(); 4763 for (UnresolvedSetIterator I = Begin; I != End; ++I) { 4764 NamedDecl *D = *I; 4765 assert(isa<FunctionTemplateDecl>(D) || 4766 (isa<UsingShadowDecl>(D) && 4767 isa<FunctionTemplateDecl>(D->getUnderlyingDecl()))); 4768 *Storage++ = D; 4769 } 4770 4771 return TemplateName(OT); 4772} 4773 4774/// \brief Retrieve the template name that represents a qualified 4775/// template name such as \c std::vector. 4776TemplateName 4777ASTContext::getQualifiedTemplateName(NestedNameSpecifier *NNS, 4778 bool TemplateKeyword, 4779 TemplateDecl *Template) const { 4780 assert(NNS && "Missing nested-name-specifier in qualified template name"); 4781 4782 // FIXME: Canonicalization? 4783 llvm::FoldingSetNodeID ID; 4784 QualifiedTemplateName::Profile(ID, NNS, TemplateKeyword, Template); 4785 4786 void *InsertPos = 0; 4787 QualifiedTemplateName *QTN = 4788 QualifiedTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4789 if (!QTN) { 4790 QTN = new (*this,4) QualifiedTemplateName(NNS, TemplateKeyword, Template); 4791 QualifiedTemplateNames.InsertNode(QTN, InsertPos); 4792 } 4793 4794 return TemplateName(QTN); 4795} 4796 4797/// \brief Retrieve the template name that represents a dependent 4798/// template name such as \c MetaFun::template apply. 4799TemplateName 4800ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 4801 const IdentifierInfo *Name) const { 4802 assert((!NNS || NNS->isDependent()) && 4803 "Nested name specifier must be dependent"); 4804 4805 llvm::FoldingSetNodeID ID; 4806 DependentTemplateName::Profile(ID, NNS, Name); 4807 4808 void *InsertPos = 0; 4809 DependentTemplateName *QTN = 4810 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4811 4812 if (QTN) 4813 return TemplateName(QTN); 4814 4815 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 4816 if (CanonNNS == NNS) { 4817 QTN = new (*this,4) DependentTemplateName(NNS, Name); 4818 } else { 4819 TemplateName Canon = getDependentTemplateName(CanonNNS, Name); 4820 QTN = new (*this,4) DependentTemplateName(NNS, Name, Canon); 4821 DependentTemplateName *CheckQTN = 4822 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4823 assert(!CheckQTN && "Dependent type name canonicalization broken"); 4824 (void)CheckQTN; 4825 } 4826 4827 DependentTemplateNames.InsertNode(QTN, InsertPos); 4828 return TemplateName(QTN); 4829} 4830 4831/// \brief Retrieve the template name that represents a dependent 4832/// template name such as \c MetaFun::template operator+. 4833TemplateName 4834ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 4835 OverloadedOperatorKind Operator) const { 4836 assert((!NNS || NNS->isDependent()) && 4837 "Nested name specifier must be dependent"); 4838 4839 llvm::FoldingSetNodeID ID; 4840 DependentTemplateName::Profile(ID, NNS, Operator); 4841 4842 void *InsertPos = 0; 4843 DependentTemplateName *QTN 4844 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4845 4846 if (QTN) 4847 return TemplateName(QTN); 4848 4849 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 4850 if (CanonNNS == NNS) { 4851 QTN = new (*this,4) DependentTemplateName(NNS, Operator); 4852 } else { 4853 TemplateName Canon = getDependentTemplateName(CanonNNS, Operator); 4854 QTN = new (*this,4) DependentTemplateName(NNS, Operator, Canon); 4855 4856 DependentTemplateName *CheckQTN 4857 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4858 assert(!CheckQTN && "Dependent template name canonicalization broken"); 4859 (void)CheckQTN; 4860 } 4861 4862 DependentTemplateNames.InsertNode(QTN, InsertPos); 4863 return TemplateName(QTN); 4864} 4865 4866TemplateName 4867ASTContext::getSubstTemplateTemplateParm(TemplateTemplateParmDecl *param, 4868 TemplateName replacement) const { 4869 llvm::FoldingSetNodeID ID; 4870 SubstTemplateTemplateParmStorage::Profile(ID, param, replacement); 4871 4872 void *insertPos = 0; 4873 SubstTemplateTemplateParmStorage *subst 4874 = SubstTemplateTemplateParms.FindNodeOrInsertPos(ID, insertPos); 4875 4876 if (!subst) { 4877 subst = new (*this) SubstTemplateTemplateParmStorage(param, replacement); 4878 SubstTemplateTemplateParms.InsertNode(subst, insertPos); 4879 } 4880 4881 return TemplateName(subst); 4882} 4883 4884TemplateName 4885ASTContext::getSubstTemplateTemplateParmPack(TemplateTemplateParmDecl *Param, 4886 const TemplateArgument &ArgPack) const { 4887 ASTContext &Self = const_cast<ASTContext &>(*this); 4888 llvm::FoldingSetNodeID ID; 4889 SubstTemplateTemplateParmPackStorage::Profile(ID, Self, Param, ArgPack); 4890 4891 void *InsertPos = 0; 4892 SubstTemplateTemplateParmPackStorage *Subst 4893 = SubstTemplateTemplateParmPacks.FindNodeOrInsertPos(ID, InsertPos); 4894 4895 if (!Subst) { 4896 Subst = new (*this) SubstTemplateTemplateParmPackStorage(Param, 4897 ArgPack.pack_size(), 4898 ArgPack.pack_begin()); 4899 SubstTemplateTemplateParmPacks.InsertNode(Subst, InsertPos); 4900 } 4901 4902 return TemplateName(Subst); 4903} 4904 4905/// getFromTargetType - Given one of the integer types provided by 4906/// TargetInfo, produce the corresponding type. The unsigned @p Type 4907/// is actually a value of type @c TargetInfo::IntType. 4908CanQualType ASTContext::getFromTargetType(unsigned Type) const { 4909 switch (Type) { 4910 case TargetInfo::NoInt: return CanQualType(); 4911 case TargetInfo::SignedShort: return ShortTy; 4912 case TargetInfo::UnsignedShort: return UnsignedShortTy; 4913 case TargetInfo::SignedInt: return IntTy; 4914 case TargetInfo::UnsignedInt: return UnsignedIntTy; 4915 case TargetInfo::SignedLong: return LongTy; 4916 case TargetInfo::UnsignedLong: return UnsignedLongTy; 4917 case TargetInfo::SignedLongLong: return LongLongTy; 4918 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy; 4919 } 4920 4921 assert(false && "Unhandled TargetInfo::IntType value"); 4922 return CanQualType(); 4923} 4924 4925//===----------------------------------------------------------------------===// 4926// Type Predicates. 4927//===----------------------------------------------------------------------===// 4928 4929/// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 4930/// garbage collection attribute. 4931/// 4932Qualifiers::GC ASTContext::getObjCGCAttrKind(QualType Ty) const { 4933 if (getLangOptions().getGC() == LangOptions::NonGC) 4934 return Qualifiers::GCNone; 4935 4936 assert(getLangOptions().ObjC1); 4937 Qualifiers::GC GCAttrs = Ty.getObjCGCAttr(); 4938 4939 // Default behaviour under objective-C's gc is for ObjC pointers 4940 // (or pointers to them) be treated as though they were declared 4941 // as __strong. 4942 if (GCAttrs == Qualifiers::GCNone) { 4943 if (Ty->isObjCObjectPointerType() || Ty->isBlockPointerType()) 4944 return Qualifiers::Strong; 4945 else if (Ty->isPointerType()) 4946 return getObjCGCAttrKind(Ty->getAs<PointerType>()->getPointeeType()); 4947 } else { 4948 // It's not valid to set GC attributes on anything that isn't a 4949 // pointer. 4950#ifndef NDEBUG 4951 QualType CT = Ty->getCanonicalTypeInternal(); 4952 while (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 4953 CT = AT->getElementType(); 4954 assert(CT->isAnyPointerType() || CT->isBlockPointerType()); 4955#endif 4956 } 4957 return GCAttrs; 4958} 4959 4960//===----------------------------------------------------------------------===// 4961// Type Compatibility Testing 4962//===----------------------------------------------------------------------===// 4963 4964/// areCompatVectorTypes - Return true if the two specified vector types are 4965/// compatible. 4966static bool areCompatVectorTypes(const VectorType *LHS, 4967 const VectorType *RHS) { 4968 assert(LHS->isCanonicalUnqualified() && RHS->isCanonicalUnqualified()); 4969 return LHS->getElementType() == RHS->getElementType() && 4970 LHS->getNumElements() == RHS->getNumElements(); 4971} 4972 4973bool ASTContext::areCompatibleVectorTypes(QualType FirstVec, 4974 QualType SecondVec) { 4975 assert(FirstVec->isVectorType() && "FirstVec should be a vector type"); 4976 assert(SecondVec->isVectorType() && "SecondVec should be a vector type"); 4977 4978 if (hasSameUnqualifiedType(FirstVec, SecondVec)) 4979 return true; 4980 4981 // Treat Neon vector types and most AltiVec vector types as if they are the 4982 // equivalent GCC vector types. 4983 const VectorType *First = FirstVec->getAs<VectorType>(); 4984 const VectorType *Second = SecondVec->getAs<VectorType>(); 4985 if (First->getNumElements() == Second->getNumElements() && 4986 hasSameType(First->getElementType(), Second->getElementType()) && 4987 First->getVectorKind() != VectorType::AltiVecPixel && 4988 First->getVectorKind() != VectorType::AltiVecBool && 4989 Second->getVectorKind() != VectorType::AltiVecPixel && 4990 Second->getVectorKind() != VectorType::AltiVecBool) 4991 return true; 4992 4993 return false; 4994} 4995 4996//===----------------------------------------------------------------------===// 4997// ObjCQualifiedIdTypesAreCompatible - Compatibility testing for qualified id's. 4998//===----------------------------------------------------------------------===// 4999 5000/// ProtocolCompatibleWithProtocol - return 'true' if 'lProto' is in the 5001/// inheritance hierarchy of 'rProto'. 5002bool 5003ASTContext::ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 5004 ObjCProtocolDecl *rProto) const { 5005 if (lProto == rProto) 5006 return true; 5007 for (ObjCProtocolDecl::protocol_iterator PI = rProto->protocol_begin(), 5008 E = rProto->protocol_end(); PI != E; ++PI) 5009 if (ProtocolCompatibleWithProtocol(lProto, *PI)) 5010 return true; 5011 return false; 5012} 5013 5014/// QualifiedIdConformsQualifiedId - compare id<p,...> with id<p1,...> 5015/// return true if lhs's protocols conform to rhs's protocol; false 5016/// otherwise. 5017bool ASTContext::QualifiedIdConformsQualifiedId(QualType lhs, QualType rhs) { 5018 if (lhs->isObjCQualifiedIdType() && rhs->isObjCQualifiedIdType()) 5019 return ObjCQualifiedIdTypesAreCompatible(lhs, rhs, false); 5020 return false; 5021} 5022 5023/// ObjCQualifiedClassTypesAreCompatible - compare Class<p,...> and 5024/// Class<p1, ...>. 5025bool ASTContext::ObjCQualifiedClassTypesAreCompatible(QualType lhs, 5026 QualType rhs) { 5027 const ObjCObjectPointerType *lhsQID = lhs->getAs<ObjCObjectPointerType>(); 5028 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 5029 assert ((lhsQID && rhsOPT) && "ObjCQualifiedClassTypesAreCompatible"); 5030 5031 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 5032 E = lhsQID->qual_end(); I != E; ++I) { 5033 bool match = false; 5034 ObjCProtocolDecl *lhsProto = *I; 5035 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 5036 E = rhsOPT->qual_end(); J != E; ++J) { 5037 ObjCProtocolDecl *rhsProto = *J; 5038 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto)) { 5039 match = true; 5040 break; 5041 } 5042 } 5043 if (!match) 5044 return false; 5045 } 5046 return true; 5047} 5048 5049/// ObjCQualifiedIdTypesAreCompatible - We know that one of lhs/rhs is an 5050/// ObjCQualifiedIDType. 5051bool ASTContext::ObjCQualifiedIdTypesAreCompatible(QualType lhs, QualType rhs, 5052 bool compare) { 5053 // Allow id<P..> and an 'id' or void* type in all cases. 5054 if (lhs->isVoidPointerType() || 5055 lhs->isObjCIdType() || lhs->isObjCClassType()) 5056 return true; 5057 else if (rhs->isVoidPointerType() || 5058 rhs->isObjCIdType() || rhs->isObjCClassType()) 5059 return true; 5060 5061 if (const ObjCObjectPointerType *lhsQID = lhs->getAsObjCQualifiedIdType()) { 5062 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 5063 5064 if (!rhsOPT) return false; 5065 5066 if (rhsOPT->qual_empty()) { 5067 // If the RHS is a unqualified interface pointer "NSString*", 5068 // make sure we check the class hierarchy. 5069 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 5070 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 5071 E = lhsQID->qual_end(); I != E; ++I) { 5072 // when comparing an id<P> on lhs with a static type on rhs, 5073 // see if static class implements all of id's protocols, directly or 5074 // through its super class and categories. 5075 if (!rhsID->ClassImplementsProtocol(*I, true)) 5076 return false; 5077 } 5078 } 5079 // If there are no qualifiers and no interface, we have an 'id'. 5080 return true; 5081 } 5082 // Both the right and left sides have qualifiers. 5083 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 5084 E = lhsQID->qual_end(); I != E; ++I) { 5085 ObjCProtocolDecl *lhsProto = *I; 5086 bool match = false; 5087 5088 // when comparing an id<P> on lhs with a static type on rhs, 5089 // see if static class implements all of id's protocols, directly or 5090 // through its super class and categories. 5091 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 5092 E = rhsOPT->qual_end(); J != E; ++J) { 5093 ObjCProtocolDecl *rhsProto = *J; 5094 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 5095 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 5096 match = true; 5097 break; 5098 } 5099 } 5100 // If the RHS is a qualified interface pointer "NSString<P>*", 5101 // make sure we check the class hierarchy. 5102 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 5103 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 5104 E = lhsQID->qual_end(); I != E; ++I) { 5105 // when comparing an id<P> on lhs with a static type on rhs, 5106 // see if static class implements all of id's protocols, directly or 5107 // through its super class and categories. 5108 if (rhsID->ClassImplementsProtocol(*I, true)) { 5109 match = true; 5110 break; 5111 } 5112 } 5113 } 5114 if (!match) 5115 return false; 5116 } 5117 5118 return true; 5119 } 5120 5121 const ObjCObjectPointerType *rhsQID = rhs->getAsObjCQualifiedIdType(); 5122 assert(rhsQID && "One of the LHS/RHS should be id<x>"); 5123 5124 if (const ObjCObjectPointerType *lhsOPT = 5125 lhs->getAsObjCInterfacePointerType()) { 5126 // If both the right and left sides have qualifiers. 5127 for (ObjCObjectPointerType::qual_iterator I = lhsOPT->qual_begin(), 5128 E = lhsOPT->qual_end(); I != E; ++I) { 5129 ObjCProtocolDecl *lhsProto = *I; 5130 bool match = false; 5131 5132 // when comparing an id<P> on rhs with a static type on lhs, 5133 // see if static class implements all of id's protocols, directly or 5134 // through its super class and categories. 5135 // First, lhs protocols in the qualifier list must be found, direct 5136 // or indirect in rhs's qualifier list or it is a mismatch. 5137 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 5138 E = rhsQID->qual_end(); J != E; ++J) { 5139 ObjCProtocolDecl *rhsProto = *J; 5140 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 5141 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 5142 match = true; 5143 break; 5144 } 5145 } 5146 if (!match) 5147 return false; 5148 } 5149 5150 // Static class's protocols, or its super class or category protocols 5151 // must be found, direct or indirect in rhs's qualifier list or it is a mismatch. 5152 if (ObjCInterfaceDecl *lhsID = lhsOPT->getInterfaceDecl()) { 5153 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 5154 CollectInheritedProtocols(lhsID, LHSInheritedProtocols); 5155 // This is rather dubious but matches gcc's behavior. If lhs has 5156 // no type qualifier and its class has no static protocol(s) 5157 // assume that it is mismatch. 5158 if (LHSInheritedProtocols.empty() && lhsOPT->qual_empty()) 5159 return false; 5160 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 5161 LHSInheritedProtocols.begin(), 5162 E = LHSInheritedProtocols.end(); I != E; ++I) { 5163 bool match = false; 5164 ObjCProtocolDecl *lhsProto = (*I); 5165 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 5166 E = rhsQID->qual_end(); J != E; ++J) { 5167 ObjCProtocolDecl *rhsProto = *J; 5168 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 5169 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 5170 match = true; 5171 break; 5172 } 5173 } 5174 if (!match) 5175 return false; 5176 } 5177 } 5178 return true; 5179 } 5180 return false; 5181} 5182 5183/// canAssignObjCInterfaces - Return true if the two interface types are 5184/// compatible for assignment from RHS to LHS. This handles validation of any 5185/// protocol qualifiers on the LHS or RHS. 5186/// 5187bool ASTContext::canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 5188 const ObjCObjectPointerType *RHSOPT) { 5189 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 5190 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 5191 5192 // If either type represents the built-in 'id' or 'Class' types, return true. 5193 if (LHS->isObjCUnqualifiedIdOrClass() || 5194 RHS->isObjCUnqualifiedIdOrClass()) 5195 return true; 5196 5197 if (LHS->isObjCQualifiedId() || RHS->isObjCQualifiedId()) 5198 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 5199 QualType(RHSOPT,0), 5200 false); 5201 5202 if (LHS->isObjCQualifiedClass() && RHS->isObjCQualifiedClass()) 5203 return ObjCQualifiedClassTypesAreCompatible(QualType(LHSOPT,0), 5204 QualType(RHSOPT,0)); 5205 5206 // If we have 2 user-defined types, fall into that path. 5207 if (LHS->getInterface() && RHS->getInterface()) 5208 return canAssignObjCInterfaces(LHS, RHS); 5209 5210 return false; 5211} 5212 5213/// canAssignObjCInterfacesInBlockPointer - This routine is specifically written 5214/// for providing type-safety for objective-c pointers used to pass/return 5215/// arguments in block literals. When passed as arguments, passing 'A*' where 5216/// 'id' is expected is not OK. Passing 'Sub *" where 'Super *" is expected is 5217/// not OK. For the return type, the opposite is not OK. 5218bool ASTContext::canAssignObjCInterfacesInBlockPointer( 5219 const ObjCObjectPointerType *LHSOPT, 5220 const ObjCObjectPointerType *RHSOPT, 5221 bool BlockReturnType) { 5222 if (RHSOPT->isObjCBuiltinType() || LHSOPT->isObjCIdType()) 5223 return true; 5224 5225 if (LHSOPT->isObjCBuiltinType()) { 5226 return RHSOPT->isObjCBuiltinType() || RHSOPT->isObjCQualifiedIdType(); 5227 } 5228 5229 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 5230 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 5231 QualType(RHSOPT,0), 5232 false); 5233 5234 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 5235 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 5236 if (LHS && RHS) { // We have 2 user-defined types. 5237 if (LHS != RHS) { 5238 if (LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 5239 return BlockReturnType; 5240 if (RHS->getDecl()->isSuperClassOf(LHS->getDecl())) 5241 return !BlockReturnType; 5242 } 5243 else 5244 return true; 5245 } 5246 return false; 5247} 5248 5249/// getIntersectionOfProtocols - This routine finds the intersection of set 5250/// of protocols inherited from two distinct objective-c pointer objects. 5251/// It is used to build composite qualifier list of the composite type of 5252/// the conditional expression involving two objective-c pointer objects. 5253static 5254void getIntersectionOfProtocols(ASTContext &Context, 5255 const ObjCObjectPointerType *LHSOPT, 5256 const ObjCObjectPointerType *RHSOPT, 5257 SmallVectorImpl<ObjCProtocolDecl *> &IntersectionOfProtocols) { 5258 5259 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 5260 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 5261 assert(LHS->getInterface() && "LHS must have an interface base"); 5262 assert(RHS->getInterface() && "RHS must have an interface base"); 5263 5264 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> InheritedProtocolSet; 5265 unsigned LHSNumProtocols = LHS->getNumProtocols(); 5266 if (LHSNumProtocols > 0) 5267 InheritedProtocolSet.insert(LHS->qual_begin(), LHS->qual_end()); 5268 else { 5269 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 5270 Context.CollectInheritedProtocols(LHS->getInterface(), 5271 LHSInheritedProtocols); 5272 InheritedProtocolSet.insert(LHSInheritedProtocols.begin(), 5273 LHSInheritedProtocols.end()); 5274 } 5275 5276 unsigned RHSNumProtocols = RHS->getNumProtocols(); 5277 if (RHSNumProtocols > 0) { 5278 ObjCProtocolDecl **RHSProtocols = 5279 const_cast<ObjCProtocolDecl **>(RHS->qual_begin()); 5280 for (unsigned i = 0; i < RHSNumProtocols; ++i) 5281 if (InheritedProtocolSet.count(RHSProtocols[i])) 5282 IntersectionOfProtocols.push_back(RHSProtocols[i]); 5283 } else { 5284 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> RHSInheritedProtocols; 5285 Context.CollectInheritedProtocols(RHS->getInterface(), 5286 RHSInheritedProtocols); 5287 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 5288 RHSInheritedProtocols.begin(), 5289 E = RHSInheritedProtocols.end(); I != E; ++I) 5290 if (InheritedProtocolSet.count((*I))) 5291 IntersectionOfProtocols.push_back((*I)); 5292 } 5293} 5294 5295/// areCommonBaseCompatible - Returns common base class of the two classes if 5296/// one found. Note that this is O'2 algorithm. But it will be called as the 5297/// last type comparison in a ?-exp of ObjC pointer types before a 5298/// warning is issued. So, its invokation is extremely rare. 5299QualType ASTContext::areCommonBaseCompatible( 5300 const ObjCObjectPointerType *Lptr, 5301 const ObjCObjectPointerType *Rptr) { 5302 const ObjCObjectType *LHS = Lptr->getObjectType(); 5303 const ObjCObjectType *RHS = Rptr->getObjectType(); 5304 const ObjCInterfaceDecl* LDecl = LHS->getInterface(); 5305 const ObjCInterfaceDecl* RDecl = RHS->getInterface(); 5306 if (!LDecl || !RDecl || (LDecl == RDecl)) 5307 return QualType(); 5308 5309 do { 5310 LHS = cast<ObjCInterfaceType>(getObjCInterfaceType(LDecl)); 5311 if (canAssignObjCInterfaces(LHS, RHS)) { 5312 SmallVector<ObjCProtocolDecl *, 8> Protocols; 5313 getIntersectionOfProtocols(*this, Lptr, Rptr, Protocols); 5314 5315 QualType Result = QualType(LHS, 0); 5316 if (!Protocols.empty()) 5317 Result = getObjCObjectType(Result, Protocols.data(), Protocols.size()); 5318 Result = getObjCObjectPointerType(Result); 5319 return Result; 5320 } 5321 } while ((LDecl = LDecl->getSuperClass())); 5322 5323 return QualType(); 5324} 5325 5326bool ASTContext::canAssignObjCInterfaces(const ObjCObjectType *LHS, 5327 const ObjCObjectType *RHS) { 5328 assert(LHS->getInterface() && "LHS is not an interface type"); 5329 assert(RHS->getInterface() && "RHS is not an interface type"); 5330 5331 // Verify that the base decls are compatible: the RHS must be a subclass of 5332 // the LHS. 5333 if (!LHS->getInterface()->isSuperClassOf(RHS->getInterface())) 5334 return false; 5335 5336 // RHS must have a superset of the protocols in the LHS. If the LHS is not 5337 // protocol qualified at all, then we are good. 5338 if (LHS->getNumProtocols() == 0) 5339 return true; 5340 5341 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, 5342 // more detailed analysis is required. 5343 if (RHS->getNumProtocols() == 0) { 5344 // OK, if LHS is a superclass of RHS *and* 5345 // this superclass is assignment compatible with LHS. 5346 // false otherwise. 5347 bool IsSuperClass = 5348 LHS->getInterface()->isSuperClassOf(RHS->getInterface()); 5349 if (IsSuperClass) { 5350 // OK if conversion of LHS to SuperClass results in narrowing of types 5351 // ; i.e., SuperClass may implement at least one of the protocols 5352 // in LHS's protocol list. Example, SuperObj<P1> = lhs<P1,P2> is ok. 5353 // But not SuperObj<P1,P2,P3> = lhs<P1,P2>. 5354 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> SuperClassInheritedProtocols; 5355 CollectInheritedProtocols(RHS->getInterface(), SuperClassInheritedProtocols); 5356 // If super class has no protocols, it is not a match. 5357 if (SuperClassInheritedProtocols.empty()) 5358 return false; 5359 5360 for (ObjCObjectType::qual_iterator LHSPI = LHS->qual_begin(), 5361 LHSPE = LHS->qual_end(); 5362 LHSPI != LHSPE; LHSPI++) { 5363 bool SuperImplementsProtocol = false; 5364 ObjCProtocolDecl *LHSProto = (*LHSPI); 5365 5366 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 5367 SuperClassInheritedProtocols.begin(), 5368 E = SuperClassInheritedProtocols.end(); I != E; ++I) { 5369 ObjCProtocolDecl *SuperClassProto = (*I); 5370 if (SuperClassProto->lookupProtocolNamed(LHSProto->getIdentifier())) { 5371 SuperImplementsProtocol = true; 5372 break; 5373 } 5374 } 5375 if (!SuperImplementsProtocol) 5376 return false; 5377 } 5378 return true; 5379 } 5380 return false; 5381 } 5382 5383 for (ObjCObjectType::qual_iterator LHSPI = LHS->qual_begin(), 5384 LHSPE = LHS->qual_end(); 5385 LHSPI != LHSPE; LHSPI++) { 5386 bool RHSImplementsProtocol = false; 5387 5388 // If the RHS doesn't implement the protocol on the left, the types 5389 // are incompatible. 5390 for (ObjCObjectType::qual_iterator RHSPI = RHS->qual_begin(), 5391 RHSPE = RHS->qual_end(); 5392 RHSPI != RHSPE; RHSPI++) { 5393 if ((*RHSPI)->lookupProtocolNamed((*LHSPI)->getIdentifier())) { 5394 RHSImplementsProtocol = true; 5395 break; 5396 } 5397 } 5398 // FIXME: For better diagnostics, consider passing back the protocol name. 5399 if (!RHSImplementsProtocol) 5400 return false; 5401 } 5402 // The RHS implements all protocols listed on the LHS. 5403 return true; 5404} 5405 5406bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) { 5407 // get the "pointed to" types 5408 const ObjCObjectPointerType *LHSOPT = LHS->getAs<ObjCObjectPointerType>(); 5409 const ObjCObjectPointerType *RHSOPT = RHS->getAs<ObjCObjectPointerType>(); 5410 5411 if (!LHSOPT || !RHSOPT) 5412 return false; 5413 5414 return canAssignObjCInterfaces(LHSOPT, RHSOPT) || 5415 canAssignObjCInterfaces(RHSOPT, LHSOPT); 5416} 5417 5418bool ASTContext::canBindObjCObjectType(QualType To, QualType From) { 5419 return canAssignObjCInterfaces( 5420 getObjCObjectPointerType(To)->getAs<ObjCObjectPointerType>(), 5421 getObjCObjectPointerType(From)->getAs<ObjCObjectPointerType>()); 5422} 5423 5424/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible, 5425/// both shall have the identically qualified version of a compatible type. 5426/// C99 6.2.7p1: Two types have compatible types if their types are the 5427/// same. See 6.7.[2,3,5] for additional rules. 5428bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS, 5429 bool CompareUnqualified) { 5430 if (getLangOptions().CPlusPlus) 5431 return hasSameType(LHS, RHS); 5432 5433 return !mergeTypes(LHS, RHS, false, CompareUnqualified).isNull(); 5434} 5435 5436bool ASTContext::propertyTypesAreCompatible(QualType LHS, QualType RHS) { 5437 return typesAreCompatible(LHS, RHS); 5438} 5439 5440bool ASTContext::typesAreBlockPointerCompatible(QualType LHS, QualType RHS) { 5441 return !mergeTypes(LHS, RHS, true).isNull(); 5442} 5443 5444/// mergeTransparentUnionType - if T is a transparent union type and a member 5445/// of T is compatible with SubType, return the merged type, else return 5446/// QualType() 5447QualType ASTContext::mergeTransparentUnionType(QualType T, QualType SubType, 5448 bool OfBlockPointer, 5449 bool Unqualified) { 5450 if (const RecordType *UT = T->getAsUnionType()) { 5451 RecordDecl *UD = UT->getDecl(); 5452 if (UD->hasAttr<TransparentUnionAttr>()) { 5453 for (RecordDecl::field_iterator it = UD->field_begin(), 5454 itend = UD->field_end(); it != itend; ++it) { 5455 QualType ET = it->getType().getUnqualifiedType(); 5456 QualType MT = mergeTypes(ET, SubType, OfBlockPointer, Unqualified); 5457 if (!MT.isNull()) 5458 return MT; 5459 } 5460 } 5461 } 5462 5463 return QualType(); 5464} 5465 5466/// mergeFunctionArgumentTypes - merge two types which appear as function 5467/// argument types 5468QualType ASTContext::mergeFunctionArgumentTypes(QualType lhs, QualType rhs, 5469 bool OfBlockPointer, 5470 bool Unqualified) { 5471 // GNU extension: two types are compatible if they appear as a function 5472 // argument, one of the types is a transparent union type and the other 5473 // type is compatible with a union member 5474 QualType lmerge = mergeTransparentUnionType(lhs, rhs, OfBlockPointer, 5475 Unqualified); 5476 if (!lmerge.isNull()) 5477 return lmerge; 5478 5479 QualType rmerge = mergeTransparentUnionType(rhs, lhs, OfBlockPointer, 5480 Unqualified); 5481 if (!rmerge.isNull()) 5482 return rmerge; 5483 5484 return mergeTypes(lhs, rhs, OfBlockPointer, Unqualified); 5485} 5486 5487QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs, 5488 bool OfBlockPointer, 5489 bool Unqualified) { 5490 const FunctionType *lbase = lhs->getAs<FunctionType>(); 5491 const FunctionType *rbase = rhs->getAs<FunctionType>(); 5492 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 5493 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 5494 bool allLTypes = true; 5495 bool allRTypes = true; 5496 5497 // Check return type 5498 QualType retType; 5499 if (OfBlockPointer) { 5500 QualType RHS = rbase->getResultType(); 5501 QualType LHS = lbase->getResultType(); 5502 bool UnqualifiedResult = Unqualified; 5503 if (!UnqualifiedResult) 5504 UnqualifiedResult = (!RHS.hasQualifiers() && LHS.hasQualifiers()); 5505 retType = mergeTypes(LHS, RHS, true, UnqualifiedResult, true); 5506 } 5507 else 5508 retType = mergeTypes(lbase->getResultType(), rbase->getResultType(), false, 5509 Unqualified); 5510 if (retType.isNull()) return QualType(); 5511 5512 if (Unqualified) 5513 retType = retType.getUnqualifiedType(); 5514 5515 CanQualType LRetType = getCanonicalType(lbase->getResultType()); 5516 CanQualType RRetType = getCanonicalType(rbase->getResultType()); 5517 if (Unqualified) { 5518 LRetType = LRetType.getUnqualifiedType(); 5519 RRetType = RRetType.getUnqualifiedType(); 5520 } 5521 5522 if (getCanonicalType(retType) != LRetType) 5523 allLTypes = false; 5524 if (getCanonicalType(retType) != RRetType) 5525 allRTypes = false; 5526 5527 // FIXME: double check this 5528 // FIXME: should we error if lbase->getRegParmAttr() != 0 && 5529 // rbase->getRegParmAttr() != 0 && 5530 // lbase->getRegParmAttr() != rbase->getRegParmAttr()? 5531 FunctionType::ExtInfo lbaseInfo = lbase->getExtInfo(); 5532 FunctionType::ExtInfo rbaseInfo = rbase->getExtInfo(); 5533 5534 // Compatible functions must have compatible calling conventions 5535 if (!isSameCallConv(lbaseInfo.getCC(), rbaseInfo.getCC())) 5536 return QualType(); 5537 5538 // Regparm is part of the calling convention. 5539 if (lbaseInfo.getHasRegParm() != rbaseInfo.getHasRegParm()) 5540 return QualType(); 5541 if (lbaseInfo.getRegParm() != rbaseInfo.getRegParm()) 5542 return QualType(); 5543 5544 if (lbaseInfo.getProducesResult() != rbaseInfo.getProducesResult()) 5545 return QualType(); 5546 5547 // It's noreturn if either type is. 5548 // FIXME: some uses, e.g. conditional exprs, really want this to be 'both'. 5549 bool NoReturn = lbaseInfo.getNoReturn() || rbaseInfo.getNoReturn(); 5550 if (NoReturn != lbaseInfo.getNoReturn()) 5551 allLTypes = false; 5552 if (NoReturn != rbaseInfo.getNoReturn()) 5553 allRTypes = false; 5554 5555 FunctionType::ExtInfo einfo = lbaseInfo.withNoReturn(NoReturn); 5556 5557 if (lproto && rproto) { // two C99 style function prototypes 5558 assert(!lproto->hasExceptionSpec() && !rproto->hasExceptionSpec() && 5559 "C++ shouldn't be here"); 5560 unsigned lproto_nargs = lproto->getNumArgs(); 5561 unsigned rproto_nargs = rproto->getNumArgs(); 5562 5563 // Compatible functions must have the same number of arguments 5564 if (lproto_nargs != rproto_nargs) 5565 return QualType(); 5566 5567 // Variadic and non-variadic functions aren't compatible 5568 if (lproto->isVariadic() != rproto->isVariadic()) 5569 return QualType(); 5570 5571 if (lproto->getTypeQuals() != rproto->getTypeQuals()) 5572 return QualType(); 5573 5574 // Check argument compatibility 5575 SmallVector<QualType, 10> types; 5576 for (unsigned i = 0; i < lproto_nargs; i++) { 5577 QualType largtype = lproto->getArgType(i).getUnqualifiedType(); 5578 QualType rargtype = rproto->getArgType(i).getUnqualifiedType(); 5579 QualType argtype = mergeFunctionArgumentTypes(largtype, rargtype, 5580 OfBlockPointer, 5581 Unqualified); 5582 if (argtype.isNull()) return QualType(); 5583 5584 if (Unqualified) 5585 argtype = argtype.getUnqualifiedType(); 5586 5587 types.push_back(argtype); 5588 if (Unqualified) { 5589 largtype = largtype.getUnqualifiedType(); 5590 rargtype = rargtype.getUnqualifiedType(); 5591 } 5592 5593 if (getCanonicalType(argtype) != getCanonicalType(largtype)) 5594 allLTypes = false; 5595 if (getCanonicalType(argtype) != getCanonicalType(rargtype)) 5596 allRTypes = false; 5597 } 5598 if (allLTypes) return lhs; 5599 if (allRTypes) return rhs; 5600 5601 FunctionProtoType::ExtProtoInfo EPI = lproto->getExtProtoInfo(); 5602 EPI.ExtInfo = einfo; 5603 return getFunctionType(retType, types.begin(), types.size(), EPI); 5604 } 5605 5606 if (lproto) allRTypes = false; 5607 if (rproto) allLTypes = false; 5608 5609 const FunctionProtoType *proto = lproto ? lproto : rproto; 5610 if (proto) { 5611 assert(!proto->hasExceptionSpec() && "C++ shouldn't be here"); 5612 if (proto->isVariadic()) return QualType(); 5613 // Check that the types are compatible with the types that 5614 // would result from default argument promotions (C99 6.7.5.3p15). 5615 // The only types actually affected are promotable integer 5616 // types and floats, which would be passed as a different 5617 // type depending on whether the prototype is visible. 5618 unsigned proto_nargs = proto->getNumArgs(); 5619 for (unsigned i = 0; i < proto_nargs; ++i) { 5620 QualType argTy = proto->getArgType(i); 5621 5622 // Look at the promotion type of enum types, since that is the type used 5623 // to pass enum values. 5624 if (const EnumType *Enum = argTy->getAs<EnumType>()) 5625 argTy = Enum->getDecl()->getPromotionType(); 5626 5627 if (argTy->isPromotableIntegerType() || 5628 getCanonicalType(argTy).getUnqualifiedType() == FloatTy) 5629 return QualType(); 5630 } 5631 5632 if (allLTypes) return lhs; 5633 if (allRTypes) return rhs; 5634 5635 FunctionProtoType::ExtProtoInfo EPI = proto->getExtProtoInfo(); 5636 EPI.ExtInfo = einfo; 5637 return getFunctionType(retType, proto->arg_type_begin(), 5638 proto->getNumArgs(), EPI); 5639 } 5640 5641 if (allLTypes) return lhs; 5642 if (allRTypes) return rhs; 5643 return getFunctionNoProtoType(retType, einfo); 5644} 5645 5646QualType ASTContext::mergeTypes(QualType LHS, QualType RHS, 5647 bool OfBlockPointer, 5648 bool Unqualified, bool BlockReturnType) { 5649 // C++ [expr]: If an expression initially has the type "reference to T", the 5650 // type is adjusted to "T" prior to any further analysis, the expression 5651 // designates the object or function denoted by the reference, and the 5652 // expression is an lvalue unless the reference is an rvalue reference and 5653 // the expression is a function call (possibly inside parentheses). 5654 assert(!LHS->getAs<ReferenceType>() && "LHS is a reference type?"); 5655 assert(!RHS->getAs<ReferenceType>() && "RHS is a reference type?"); 5656 5657 if (Unqualified) { 5658 LHS = LHS.getUnqualifiedType(); 5659 RHS = RHS.getUnqualifiedType(); 5660 } 5661 5662 QualType LHSCan = getCanonicalType(LHS), 5663 RHSCan = getCanonicalType(RHS); 5664 5665 // If two types are identical, they are compatible. 5666 if (LHSCan == RHSCan) 5667 return LHS; 5668 5669 // If the qualifiers are different, the types aren't compatible... mostly. 5670 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 5671 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 5672 if (LQuals != RQuals) { 5673 // If any of these qualifiers are different, we have a type 5674 // mismatch. 5675 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 5676 LQuals.getAddressSpace() != RQuals.getAddressSpace() || 5677 LQuals.getObjCLifetime() != RQuals.getObjCLifetime()) 5678 return QualType(); 5679 5680 // Exactly one GC qualifier difference is allowed: __strong is 5681 // okay if the other type has no GC qualifier but is an Objective 5682 // C object pointer (i.e. implicitly strong by default). We fix 5683 // this by pretending that the unqualified type was actually 5684 // qualified __strong. 5685 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 5686 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 5687 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 5688 5689 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 5690 return QualType(); 5691 5692 if (GC_L == Qualifiers::Strong && RHSCan->isObjCObjectPointerType()) { 5693 return mergeTypes(LHS, getObjCGCQualType(RHS, Qualifiers::Strong)); 5694 } 5695 if (GC_R == Qualifiers::Strong && LHSCan->isObjCObjectPointerType()) { 5696 return mergeTypes(getObjCGCQualType(LHS, Qualifiers::Strong), RHS); 5697 } 5698 return QualType(); 5699 } 5700 5701 // Okay, qualifiers are equal. 5702 5703 Type::TypeClass LHSClass = LHSCan->getTypeClass(); 5704 Type::TypeClass RHSClass = RHSCan->getTypeClass(); 5705 5706 // We want to consider the two function types to be the same for these 5707 // comparisons, just force one to the other. 5708 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto; 5709 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto; 5710 5711 // Same as above for arrays 5712 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray) 5713 LHSClass = Type::ConstantArray; 5714 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray) 5715 RHSClass = Type::ConstantArray; 5716 5717 // ObjCInterfaces are just specialized ObjCObjects. 5718 if (LHSClass == Type::ObjCInterface) LHSClass = Type::ObjCObject; 5719 if (RHSClass == Type::ObjCInterface) RHSClass = Type::ObjCObject; 5720 5721 // Canonicalize ExtVector -> Vector. 5722 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector; 5723 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector; 5724 5725 // If the canonical type classes don't match. 5726 if (LHSClass != RHSClass) { 5727 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char, 5728 // a signed integer type, or an unsigned integer type. 5729 // Compatibility is based on the underlying type, not the promotion 5730 // type. 5731 if (const EnumType* ETy = LHS->getAs<EnumType>()) { 5732 if (ETy->getDecl()->getIntegerType() == RHSCan.getUnqualifiedType()) 5733 return RHS; 5734 } 5735 if (const EnumType* ETy = RHS->getAs<EnumType>()) { 5736 if (ETy->getDecl()->getIntegerType() == LHSCan.getUnqualifiedType()) 5737 return LHS; 5738 } 5739 5740 return QualType(); 5741 } 5742 5743 // The canonical type classes match. 5744 switch (LHSClass) { 5745#define TYPE(Class, Base) 5746#define ABSTRACT_TYPE(Class, Base) 5747#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) case Type::Class: 5748#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 5749#define DEPENDENT_TYPE(Class, Base) case Type::Class: 5750#include "clang/AST/TypeNodes.def" 5751 assert(false && "Non-canonical and dependent types shouldn't get here"); 5752 return QualType(); 5753 5754 case Type::LValueReference: 5755 case Type::RValueReference: 5756 case Type::MemberPointer: 5757 assert(false && "C++ should never be in mergeTypes"); 5758 return QualType(); 5759 5760 case Type::ObjCInterface: 5761 case Type::IncompleteArray: 5762 case Type::VariableArray: 5763 case Type::FunctionProto: 5764 case Type::ExtVector: 5765 assert(false && "Types are eliminated above"); 5766 return QualType(); 5767 5768 case Type::Pointer: 5769 { 5770 // Merge two pointer types, while trying to preserve typedef info 5771 QualType LHSPointee = LHS->getAs<PointerType>()->getPointeeType(); 5772 QualType RHSPointee = RHS->getAs<PointerType>()->getPointeeType(); 5773 if (Unqualified) { 5774 LHSPointee = LHSPointee.getUnqualifiedType(); 5775 RHSPointee = RHSPointee.getUnqualifiedType(); 5776 } 5777 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, false, 5778 Unqualified); 5779 if (ResultType.isNull()) return QualType(); 5780 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 5781 return LHS; 5782 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 5783 return RHS; 5784 return getPointerType(ResultType); 5785 } 5786 case Type::BlockPointer: 5787 { 5788 // Merge two block pointer types, while trying to preserve typedef info 5789 QualType LHSPointee = LHS->getAs<BlockPointerType>()->getPointeeType(); 5790 QualType RHSPointee = RHS->getAs<BlockPointerType>()->getPointeeType(); 5791 if (Unqualified) { 5792 LHSPointee = LHSPointee.getUnqualifiedType(); 5793 RHSPointee = RHSPointee.getUnqualifiedType(); 5794 } 5795 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, OfBlockPointer, 5796 Unqualified); 5797 if (ResultType.isNull()) return QualType(); 5798 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 5799 return LHS; 5800 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 5801 return RHS; 5802 return getBlockPointerType(ResultType); 5803 } 5804 case Type::ConstantArray: 5805 { 5806 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS); 5807 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS); 5808 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize()) 5809 return QualType(); 5810 5811 QualType LHSElem = getAsArrayType(LHS)->getElementType(); 5812 QualType RHSElem = getAsArrayType(RHS)->getElementType(); 5813 if (Unqualified) { 5814 LHSElem = LHSElem.getUnqualifiedType(); 5815 RHSElem = RHSElem.getUnqualifiedType(); 5816 } 5817 5818 QualType ResultType = mergeTypes(LHSElem, RHSElem, false, Unqualified); 5819 if (ResultType.isNull()) return QualType(); 5820 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 5821 return LHS; 5822 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 5823 return RHS; 5824 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(), 5825 ArrayType::ArraySizeModifier(), 0); 5826 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(), 5827 ArrayType::ArraySizeModifier(), 0); 5828 const VariableArrayType* LVAT = getAsVariableArrayType(LHS); 5829 const VariableArrayType* RVAT = getAsVariableArrayType(RHS); 5830 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 5831 return LHS; 5832 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 5833 return RHS; 5834 if (LVAT) { 5835 // FIXME: This isn't correct! But tricky to implement because 5836 // the array's size has to be the size of LHS, but the type 5837 // has to be different. 5838 return LHS; 5839 } 5840 if (RVAT) { 5841 // FIXME: This isn't correct! But tricky to implement because 5842 // the array's size has to be the size of RHS, but the type 5843 // has to be different. 5844 return RHS; 5845 } 5846 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS; 5847 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS; 5848 return getIncompleteArrayType(ResultType, 5849 ArrayType::ArraySizeModifier(), 0); 5850 } 5851 case Type::FunctionNoProto: 5852 return mergeFunctionTypes(LHS, RHS, OfBlockPointer, Unqualified); 5853 case Type::Record: 5854 case Type::Enum: 5855 return QualType(); 5856 case Type::Builtin: 5857 // Only exactly equal builtin types are compatible, which is tested above. 5858 return QualType(); 5859 case Type::Complex: 5860 // Distinct complex types are incompatible. 5861 return QualType(); 5862 case Type::Vector: 5863 // FIXME: The merged type should be an ExtVector! 5864 if (areCompatVectorTypes(LHSCan->getAs<VectorType>(), 5865 RHSCan->getAs<VectorType>())) 5866 return LHS; 5867 return QualType(); 5868 case Type::ObjCObject: { 5869 // Check if the types are assignment compatible. 5870 // FIXME: This should be type compatibility, e.g. whether 5871 // "LHS x; RHS x;" at global scope is legal. 5872 const ObjCObjectType* LHSIface = LHS->getAs<ObjCObjectType>(); 5873 const ObjCObjectType* RHSIface = RHS->getAs<ObjCObjectType>(); 5874 if (canAssignObjCInterfaces(LHSIface, RHSIface)) 5875 return LHS; 5876 5877 return QualType(); 5878 } 5879 case Type::ObjCObjectPointer: { 5880 if (OfBlockPointer) { 5881 if (canAssignObjCInterfacesInBlockPointer( 5882 LHS->getAs<ObjCObjectPointerType>(), 5883 RHS->getAs<ObjCObjectPointerType>(), 5884 BlockReturnType)) 5885 return LHS; 5886 return QualType(); 5887 } 5888 if (canAssignObjCInterfaces(LHS->getAs<ObjCObjectPointerType>(), 5889 RHS->getAs<ObjCObjectPointerType>())) 5890 return LHS; 5891 5892 return QualType(); 5893 } 5894 } 5895 5896 return QualType(); 5897} 5898 5899/// mergeObjCGCQualifiers - This routine merges ObjC's GC attribute of 'LHS' and 5900/// 'RHS' attributes and returns the merged version; including for function 5901/// return types. 5902QualType ASTContext::mergeObjCGCQualifiers(QualType LHS, QualType RHS) { 5903 QualType LHSCan = getCanonicalType(LHS), 5904 RHSCan = getCanonicalType(RHS); 5905 // If two types are identical, they are compatible. 5906 if (LHSCan == RHSCan) 5907 return LHS; 5908 if (RHSCan->isFunctionType()) { 5909 if (!LHSCan->isFunctionType()) 5910 return QualType(); 5911 QualType OldReturnType = 5912 cast<FunctionType>(RHSCan.getTypePtr())->getResultType(); 5913 QualType NewReturnType = 5914 cast<FunctionType>(LHSCan.getTypePtr())->getResultType(); 5915 QualType ResReturnType = 5916 mergeObjCGCQualifiers(NewReturnType, OldReturnType); 5917 if (ResReturnType.isNull()) 5918 return QualType(); 5919 if (ResReturnType == NewReturnType || ResReturnType == OldReturnType) { 5920 // id foo(); ... __strong id foo(); or: __strong id foo(); ... id foo(); 5921 // In either case, use OldReturnType to build the new function type. 5922 const FunctionType *F = LHS->getAs<FunctionType>(); 5923 if (const FunctionProtoType *FPT = cast<FunctionProtoType>(F)) { 5924 FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); 5925 EPI.ExtInfo = getFunctionExtInfo(LHS); 5926 QualType ResultType 5927 = getFunctionType(OldReturnType, FPT->arg_type_begin(), 5928 FPT->getNumArgs(), EPI); 5929 return ResultType; 5930 } 5931 } 5932 return QualType(); 5933 } 5934 5935 // If the qualifiers are different, the types can still be merged. 5936 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 5937 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 5938 if (LQuals != RQuals) { 5939 // If any of these qualifiers are different, we have a type mismatch. 5940 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 5941 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 5942 return QualType(); 5943 5944 // Exactly one GC qualifier difference is allowed: __strong is 5945 // okay if the other type has no GC qualifier but is an Objective 5946 // C object pointer (i.e. implicitly strong by default). We fix 5947 // this by pretending that the unqualified type was actually 5948 // qualified __strong. 5949 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 5950 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 5951 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 5952 5953 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 5954 return QualType(); 5955 5956 if (GC_L == Qualifiers::Strong) 5957 return LHS; 5958 if (GC_R == Qualifiers::Strong) 5959 return RHS; 5960 return QualType(); 5961 } 5962 5963 if (LHSCan->isObjCObjectPointerType() && RHSCan->isObjCObjectPointerType()) { 5964 QualType LHSBaseQT = LHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 5965 QualType RHSBaseQT = RHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 5966 QualType ResQT = mergeObjCGCQualifiers(LHSBaseQT, RHSBaseQT); 5967 if (ResQT == LHSBaseQT) 5968 return LHS; 5969 if (ResQT == RHSBaseQT) 5970 return RHS; 5971 } 5972 return QualType(); 5973} 5974 5975//===----------------------------------------------------------------------===// 5976// Integer Predicates 5977//===----------------------------------------------------------------------===// 5978 5979unsigned ASTContext::getIntWidth(QualType T) const { 5980 if (const EnumType *ET = dyn_cast<EnumType>(T)) 5981 T = ET->getDecl()->getIntegerType(); 5982 if (T->isBooleanType()) 5983 return 1; 5984 // For builtin types, just use the standard type sizing method 5985 return (unsigned)getTypeSize(T); 5986} 5987 5988QualType ASTContext::getCorrespondingUnsignedType(QualType T) { 5989 assert(T->hasSignedIntegerRepresentation() && "Unexpected type"); 5990 5991 // Turn <4 x signed int> -> <4 x unsigned int> 5992 if (const VectorType *VTy = T->getAs<VectorType>()) 5993 return getVectorType(getCorrespondingUnsignedType(VTy->getElementType()), 5994 VTy->getNumElements(), VTy->getVectorKind()); 5995 5996 // For enums, we return the unsigned version of the base type. 5997 if (const EnumType *ETy = T->getAs<EnumType>()) 5998 T = ETy->getDecl()->getIntegerType(); 5999 6000 const BuiltinType *BTy = T->getAs<BuiltinType>(); 6001 assert(BTy && "Unexpected signed integer type"); 6002 switch (BTy->getKind()) { 6003 case BuiltinType::Char_S: 6004 case BuiltinType::SChar: 6005 return UnsignedCharTy; 6006 case BuiltinType::Short: 6007 return UnsignedShortTy; 6008 case BuiltinType::Int: 6009 return UnsignedIntTy; 6010 case BuiltinType::Long: 6011 return UnsignedLongTy; 6012 case BuiltinType::LongLong: 6013 return UnsignedLongLongTy; 6014 case BuiltinType::Int128: 6015 return UnsignedInt128Ty; 6016 default: 6017 assert(0 && "Unexpected signed integer type"); 6018 return QualType(); 6019 } 6020} 6021 6022ASTMutationListener::~ASTMutationListener() { } 6023 6024 6025//===----------------------------------------------------------------------===// 6026// Builtin Type Computation 6027//===----------------------------------------------------------------------===// 6028 6029/// DecodeTypeFromStr - This decodes one type descriptor from Str, advancing the 6030/// pointer over the consumed characters. This returns the resultant type. If 6031/// AllowTypeModifiers is false then modifier like * are not parsed, just basic 6032/// types. This allows "v2i*" to be parsed as a pointer to a v2i instead of 6033/// a vector of "i*". 6034/// 6035/// RequiresICE is filled in on return to indicate whether the value is required 6036/// to be an Integer Constant Expression. 6037static QualType DecodeTypeFromStr(const char *&Str, const ASTContext &Context, 6038 ASTContext::GetBuiltinTypeError &Error, 6039 bool &RequiresICE, 6040 bool AllowTypeModifiers) { 6041 // Modifiers. 6042 int HowLong = 0; 6043 bool Signed = false, Unsigned = false; 6044 RequiresICE = false; 6045 6046 // Read the prefixed modifiers first. 6047 bool Done = false; 6048 while (!Done) { 6049 switch (*Str++) { 6050 default: Done = true; --Str; break; 6051 case 'I': 6052 RequiresICE = true; 6053 break; 6054 case 'S': 6055 assert(!Unsigned && "Can't use both 'S' and 'U' modifiers!"); 6056 assert(!Signed && "Can't use 'S' modifier multiple times!"); 6057 Signed = true; 6058 break; 6059 case 'U': 6060 assert(!Signed && "Can't use both 'S' and 'U' modifiers!"); 6061 assert(!Unsigned && "Can't use 'S' modifier multiple times!"); 6062 Unsigned = true; 6063 break; 6064 case 'L': 6065 assert(HowLong <= 2 && "Can't have LLLL modifier"); 6066 ++HowLong; 6067 break; 6068 } 6069 } 6070 6071 QualType Type; 6072 6073 // Read the base type. 6074 switch (*Str++) { 6075 default: assert(0 && "Unknown builtin type letter!"); 6076 case 'v': 6077 assert(HowLong == 0 && !Signed && !Unsigned && 6078 "Bad modifiers used with 'v'!"); 6079 Type = Context.VoidTy; 6080 break; 6081 case 'f': 6082 assert(HowLong == 0 && !Signed && !Unsigned && 6083 "Bad modifiers used with 'f'!"); 6084 Type = Context.FloatTy; 6085 break; 6086 case 'd': 6087 assert(HowLong < 2 && !Signed && !Unsigned && 6088 "Bad modifiers used with 'd'!"); 6089 if (HowLong) 6090 Type = Context.LongDoubleTy; 6091 else 6092 Type = Context.DoubleTy; 6093 break; 6094 case 's': 6095 assert(HowLong == 0 && "Bad modifiers used with 's'!"); 6096 if (Unsigned) 6097 Type = Context.UnsignedShortTy; 6098 else 6099 Type = Context.ShortTy; 6100 break; 6101 case 'i': 6102 if (HowLong == 3) 6103 Type = Unsigned ? Context.UnsignedInt128Ty : Context.Int128Ty; 6104 else if (HowLong == 2) 6105 Type = Unsigned ? Context.UnsignedLongLongTy : Context.LongLongTy; 6106 else if (HowLong == 1) 6107 Type = Unsigned ? Context.UnsignedLongTy : Context.LongTy; 6108 else 6109 Type = Unsigned ? Context.UnsignedIntTy : Context.IntTy; 6110 break; 6111 case 'c': 6112 assert(HowLong == 0 && "Bad modifiers used with 'c'!"); 6113 if (Signed) 6114 Type = Context.SignedCharTy; 6115 else if (Unsigned) 6116 Type = Context.UnsignedCharTy; 6117 else 6118 Type = Context.CharTy; 6119 break; 6120 case 'b': // boolean 6121 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'b'!"); 6122 Type = Context.BoolTy; 6123 break; 6124 case 'z': // size_t. 6125 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'z'!"); 6126 Type = Context.getSizeType(); 6127 break; 6128 case 'F': 6129 Type = Context.getCFConstantStringType(); 6130 break; 6131 case 'G': 6132 Type = Context.getObjCIdType(); 6133 break; 6134 case 'H': 6135 Type = Context.getObjCSelType(); 6136 break; 6137 case 'a': 6138 Type = Context.getBuiltinVaListType(); 6139 assert(!Type.isNull() && "builtin va list type not initialized!"); 6140 break; 6141 case 'A': 6142 // This is a "reference" to a va_list; however, what exactly 6143 // this means depends on how va_list is defined. There are two 6144 // different kinds of va_list: ones passed by value, and ones 6145 // passed by reference. An example of a by-value va_list is 6146 // x86, where va_list is a char*. An example of by-ref va_list 6147 // is x86-64, where va_list is a __va_list_tag[1]. For x86, 6148 // we want this argument to be a char*&; for x86-64, we want 6149 // it to be a __va_list_tag*. 6150 Type = Context.getBuiltinVaListType(); 6151 assert(!Type.isNull() && "builtin va list type not initialized!"); 6152 if (Type->isArrayType()) 6153 Type = Context.getArrayDecayedType(Type); 6154 else 6155 Type = Context.getLValueReferenceType(Type); 6156 break; 6157 case 'V': { 6158 char *End; 6159 unsigned NumElements = strtoul(Str, &End, 10); 6160 assert(End != Str && "Missing vector size"); 6161 Str = End; 6162 6163 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, 6164 RequiresICE, false); 6165 assert(!RequiresICE && "Can't require vector ICE"); 6166 6167 // TODO: No way to make AltiVec vectors in builtins yet. 6168 Type = Context.getVectorType(ElementType, NumElements, 6169 VectorType::GenericVector); 6170 break; 6171 } 6172 case 'X': { 6173 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, RequiresICE, 6174 false); 6175 assert(!RequiresICE && "Can't require complex ICE"); 6176 Type = Context.getComplexType(ElementType); 6177 break; 6178 } 6179 case 'Y' : { 6180 Type = Context.getPointerDiffType(); 6181 break; 6182 } 6183 case 'P': 6184 Type = Context.getFILEType(); 6185 if (Type.isNull()) { 6186 Error = ASTContext::GE_Missing_stdio; 6187 return QualType(); 6188 } 6189 break; 6190 case 'J': 6191 if (Signed) 6192 Type = Context.getsigjmp_bufType(); 6193 else 6194 Type = Context.getjmp_bufType(); 6195 6196 if (Type.isNull()) { 6197 Error = ASTContext::GE_Missing_setjmp; 6198 return QualType(); 6199 } 6200 break; 6201 } 6202 6203 // If there are modifiers and if we're allowed to parse them, go for it. 6204 Done = !AllowTypeModifiers; 6205 while (!Done) { 6206 switch (char c = *Str++) { 6207 default: Done = true; --Str; break; 6208 case '*': 6209 case '&': { 6210 // Both pointers and references can have their pointee types 6211 // qualified with an address space. 6212 char *End; 6213 unsigned AddrSpace = strtoul(Str, &End, 10); 6214 if (End != Str && AddrSpace != 0) { 6215 Type = Context.getAddrSpaceQualType(Type, AddrSpace); 6216 Str = End; 6217 } 6218 if (c == '*') 6219 Type = Context.getPointerType(Type); 6220 else 6221 Type = Context.getLValueReferenceType(Type); 6222 break; 6223 } 6224 // FIXME: There's no way to have a built-in with an rvalue ref arg. 6225 case 'C': 6226 Type = Type.withConst(); 6227 break; 6228 case 'D': 6229 Type = Context.getVolatileType(Type); 6230 break; 6231 } 6232 } 6233 6234 assert((!RequiresICE || Type->isIntegralOrEnumerationType()) && 6235 "Integer constant 'I' type must be an integer"); 6236 6237 return Type; 6238} 6239 6240/// GetBuiltinType - Return the type for the specified builtin. 6241QualType ASTContext::GetBuiltinType(unsigned Id, 6242 GetBuiltinTypeError &Error, 6243 unsigned *IntegerConstantArgs) const { 6244 const char *TypeStr = BuiltinInfo.GetTypeString(Id); 6245 6246 SmallVector<QualType, 8> ArgTypes; 6247 6248 bool RequiresICE = false; 6249 Error = GE_None; 6250 QualType ResType = DecodeTypeFromStr(TypeStr, *this, Error, 6251 RequiresICE, true); 6252 if (Error != GE_None) 6253 return QualType(); 6254 6255 assert(!RequiresICE && "Result of intrinsic cannot be required to be an ICE"); 6256 6257 while (TypeStr[0] && TypeStr[0] != '.') { 6258 QualType Ty = DecodeTypeFromStr(TypeStr, *this, Error, RequiresICE, true); 6259 if (Error != GE_None) 6260 return QualType(); 6261 6262 // If this argument is required to be an IntegerConstantExpression and the 6263 // caller cares, fill in the bitmask we return. 6264 if (RequiresICE && IntegerConstantArgs) 6265 *IntegerConstantArgs |= 1 << ArgTypes.size(); 6266 6267 // Do array -> pointer decay. The builtin should use the decayed type. 6268 if (Ty->isArrayType()) 6269 Ty = getArrayDecayedType(Ty); 6270 6271 ArgTypes.push_back(Ty); 6272 } 6273 6274 assert((TypeStr[0] != '.' || TypeStr[1] == 0) && 6275 "'.' should only occur at end of builtin type list!"); 6276 6277 FunctionType::ExtInfo EI; 6278 if (BuiltinInfo.isNoReturn(Id)) EI = EI.withNoReturn(true); 6279 6280 bool Variadic = (TypeStr[0] == '.'); 6281 6282 // We really shouldn't be making a no-proto type here, especially in C++. 6283 if (ArgTypes.empty() && Variadic) 6284 return getFunctionNoProtoType(ResType, EI); 6285 6286 FunctionProtoType::ExtProtoInfo EPI; 6287 EPI.ExtInfo = EI; 6288 EPI.Variadic = Variadic; 6289 6290 return getFunctionType(ResType, ArgTypes.data(), ArgTypes.size(), EPI); 6291} 6292 6293GVALinkage ASTContext::GetGVALinkageForFunction(const FunctionDecl *FD) { 6294 GVALinkage External = GVA_StrongExternal; 6295 6296 Linkage L = FD->getLinkage(); 6297 switch (L) { 6298 case NoLinkage: 6299 case InternalLinkage: 6300 case UniqueExternalLinkage: 6301 return GVA_Internal; 6302 6303 case ExternalLinkage: 6304 switch (FD->getTemplateSpecializationKind()) { 6305 case TSK_Undeclared: 6306 case TSK_ExplicitSpecialization: 6307 External = GVA_StrongExternal; 6308 break; 6309 6310 case TSK_ExplicitInstantiationDefinition: 6311 return GVA_ExplicitTemplateInstantiation; 6312 6313 case TSK_ExplicitInstantiationDeclaration: 6314 case TSK_ImplicitInstantiation: 6315 External = GVA_TemplateInstantiation; 6316 break; 6317 } 6318 } 6319 6320 if (!FD->isInlined()) 6321 return External; 6322 6323 if (!getLangOptions().CPlusPlus || FD->hasAttr<GNUInlineAttr>()) { 6324 // GNU or C99 inline semantics. Determine whether this symbol should be 6325 // externally visible. 6326 if (FD->isInlineDefinitionExternallyVisible()) 6327 return External; 6328 6329 // C99 inline semantics, where the symbol is not externally visible. 6330 return GVA_C99Inline; 6331 } 6332 6333 // C++0x [temp.explicit]p9: 6334 // [ Note: The intent is that an inline function that is the subject of 6335 // an explicit instantiation declaration will still be implicitly 6336 // instantiated when used so that the body can be considered for 6337 // inlining, but that no out-of-line copy of the inline function would be 6338 // generated in the translation unit. -- end note ] 6339 if (FD->getTemplateSpecializationKind() 6340 == TSK_ExplicitInstantiationDeclaration) 6341 return GVA_C99Inline; 6342 6343 return GVA_CXXInline; 6344} 6345 6346GVALinkage ASTContext::GetGVALinkageForVariable(const VarDecl *VD) { 6347 // If this is a static data member, compute the kind of template 6348 // specialization. Otherwise, this variable is not part of a 6349 // template. 6350 TemplateSpecializationKind TSK = TSK_Undeclared; 6351 if (VD->isStaticDataMember()) 6352 TSK = VD->getTemplateSpecializationKind(); 6353 6354 Linkage L = VD->getLinkage(); 6355 if (L == ExternalLinkage && getLangOptions().CPlusPlus && 6356 VD->getType()->getLinkage() == UniqueExternalLinkage) 6357 L = UniqueExternalLinkage; 6358 6359 switch (L) { 6360 case NoLinkage: 6361 case InternalLinkage: 6362 case UniqueExternalLinkage: 6363 return GVA_Internal; 6364 6365 case ExternalLinkage: 6366 switch (TSK) { 6367 case TSK_Undeclared: 6368 case TSK_ExplicitSpecialization: 6369 return GVA_StrongExternal; 6370 6371 case TSK_ExplicitInstantiationDeclaration: 6372 llvm_unreachable("Variable should not be instantiated"); 6373 // Fall through to treat this like any other instantiation. 6374 6375 case TSK_ExplicitInstantiationDefinition: 6376 return GVA_ExplicitTemplateInstantiation; 6377 6378 case TSK_ImplicitInstantiation: 6379 return GVA_TemplateInstantiation; 6380 } 6381 } 6382 6383 return GVA_StrongExternal; 6384} 6385 6386bool ASTContext::DeclMustBeEmitted(const Decl *D) { 6387 if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { 6388 if (!VD->isFileVarDecl()) 6389 return false; 6390 } else if (!isa<FunctionDecl>(D) && !isa<ObjCMethodDecl>(D)) 6391 return false; 6392 6393 // Weak references don't produce any output by themselves. 6394 if (D->hasAttr<WeakRefAttr>()) 6395 return false; 6396 6397 // Aliases and used decls are required. 6398 if (D->hasAttr<AliasAttr>() || D->hasAttr<UsedAttr>()) 6399 return true; 6400 6401 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 6402 // Forward declarations aren't required. 6403 if (!FD->doesThisDeclarationHaveABody()) 6404 return FD->doesDeclarationForceExternallyVisibleDefinition(); 6405 6406 // Constructors and destructors are required. 6407 if (FD->hasAttr<ConstructorAttr>() || FD->hasAttr<DestructorAttr>()) 6408 return true; 6409 6410 // The key function for a class is required. 6411 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { 6412 const CXXRecordDecl *RD = MD->getParent(); 6413 if (MD->isOutOfLine() && RD->isDynamicClass()) { 6414 const CXXMethodDecl *KeyFunc = getKeyFunction(RD); 6415 if (KeyFunc && KeyFunc->getCanonicalDecl() == MD->getCanonicalDecl()) 6416 return true; 6417 } 6418 } 6419 6420 GVALinkage Linkage = GetGVALinkageForFunction(FD); 6421 6422 // static, static inline, always_inline, and extern inline functions can 6423 // always be deferred. Normal inline functions can be deferred in C99/C++. 6424 // Implicit template instantiations can also be deferred in C++. 6425 if (Linkage == GVA_Internal || Linkage == GVA_C99Inline || 6426 Linkage == GVA_CXXInline || Linkage == GVA_TemplateInstantiation) 6427 return false; 6428 return true; 6429 } 6430 6431 if (const ObjCMethodDecl *Method = dyn_cast<ObjCMethodDecl>(D)) 6432 return Method->hasBody(); 6433 6434 const VarDecl *VD = cast<VarDecl>(D); 6435 assert(VD->isFileVarDecl() && "Expected file scoped var"); 6436 6437 if (VD->isThisDeclarationADefinition() == VarDecl::DeclarationOnly) 6438 return false; 6439 6440 // Structs that have non-trivial constructors or destructors are required. 6441 6442 // FIXME: Handle references. 6443 // FIXME: Be more selective about which constructors we care about. 6444 if (const RecordType *RT = VD->getType()->getAs<RecordType>()) { 6445 if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(RT->getDecl())) { 6446 if (RD->hasDefinition() && !(RD->hasTrivialDefaultConstructor() && 6447 RD->hasTrivialCopyConstructor() && 6448 RD->hasTrivialMoveConstructor() && 6449 RD->hasTrivialDestructor())) 6450 return true; 6451 } 6452 } 6453 6454 GVALinkage L = GetGVALinkageForVariable(VD); 6455 if (L == GVA_Internal || L == GVA_TemplateInstantiation) { 6456 if (!(VD->getInit() && VD->getInit()->HasSideEffects(*this))) 6457 return false; 6458 } 6459 6460 return true; 6461} 6462 6463CallingConv ASTContext::getDefaultMethodCallConv() { 6464 // Pass through to the C++ ABI object 6465 return ABI->getDefaultMethodCallConv(); 6466} 6467 6468bool ASTContext::isNearlyEmpty(const CXXRecordDecl *RD) const { 6469 // Pass through to the C++ ABI object 6470 return ABI->isNearlyEmpty(RD); 6471} 6472 6473MangleContext *ASTContext::createMangleContext() { 6474 switch (Target->getCXXABI()) { 6475 case CXXABI_ARM: 6476 case CXXABI_Itanium: 6477 return createItaniumMangleContext(*this, getDiagnostics()); 6478 case CXXABI_Microsoft: 6479 return createMicrosoftMangleContext(*this, getDiagnostics()); 6480 } 6481 assert(0 && "Unsupported ABI"); 6482 return 0; 6483} 6484 6485CXXABI::~CXXABI() {} 6486 6487size_t ASTContext::getSideTableAllocatedMemory() const { 6488 return ASTRecordLayouts.getMemorySize() 6489 + llvm::capacity_in_bytes(ObjCLayouts) 6490 + llvm::capacity_in_bytes(KeyFunctions) 6491 + llvm::capacity_in_bytes(ObjCImpls) 6492 + llvm::capacity_in_bytes(BlockVarCopyInits) 6493 + llvm::capacity_in_bytes(DeclAttrs) 6494 + llvm::capacity_in_bytes(InstantiatedFromStaticDataMember) 6495 + llvm::capacity_in_bytes(InstantiatedFromUsingDecl) 6496 + llvm::capacity_in_bytes(InstantiatedFromUsingShadowDecl) 6497 + llvm::capacity_in_bytes(InstantiatedFromUnnamedFieldDecl) 6498 + llvm::capacity_in_bytes(OverriddenMethods) 6499 + llvm::capacity_in_bytes(Types) 6500 + llvm::capacity_in_bytes(VariableArrayTypes) 6501 + llvm::capacity_in_bytes(ClassScopeSpecializationPattern); 6502} 6503