ASTContext.cpp revision e7cff2c00c3d74e38984a4db5c48d7e303d3ab8e
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 HalfRank, 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 llvm_unreachable("Invalid CXXABI type!"); 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), ObjCProtocolClassDecl(0), 228 CFConstantStringTypeDecl(0), ObjCInstanceTypeDecl(0), 229 FILEDecl(0), 230 jmp_bufDecl(0), sigjmp_bufDecl(0), ucontext_tDecl(0), 231 BlockDescriptorType(0), BlockDescriptorExtendedType(0), 232 cudaConfigureCallDecl(0), 233 NullTypeSourceInfo(QualType()), 234 FirstLocalImport(), LastLocalImport(), 235 SourceMgr(SM), LangOpts(LOpts), 236 AddrSpaceMap(0), Target(t), PrintingPolicy(LOpts), 237 Idents(idents), Selectors(sels), 238 BuiltinInfo(builtins), 239 DeclarationNames(*this), 240 ExternalSource(0), Listener(0), 241 LastSDM(0, 0), 242 UniqueBlockByRefTypeID(0) 243{ 244 if (size_reserve > 0) Types.reserve(size_reserve); 245 TUDecl = TranslationUnitDecl::Create(*this); 246 247 if (!DelayInitialization) { 248 assert(t && "No target supplied for ASTContext initialization"); 249 InitBuiltinTypes(*t); 250 } 251} 252 253ASTContext::~ASTContext() { 254 // Release the DenseMaps associated with DeclContext objects. 255 // FIXME: Is this the ideal solution? 256 ReleaseDeclContextMaps(); 257 258 // Call all of the deallocation functions. 259 for (unsigned I = 0, N = Deallocations.size(); I != N; ++I) 260 Deallocations[I].first(Deallocations[I].second); 261 262 // Release all of the memory associated with overridden C++ methods. 263 for (llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::iterator 264 OM = OverriddenMethods.begin(), OMEnd = OverriddenMethods.end(); 265 OM != OMEnd; ++OM) 266 OM->second.Destroy(); 267 268 // ASTRecordLayout objects in ASTRecordLayouts must always be destroyed 269 // because they can contain DenseMaps. 270 for (llvm::DenseMap<const ObjCContainerDecl*, 271 const ASTRecordLayout*>::iterator 272 I = ObjCLayouts.begin(), E = ObjCLayouts.end(); I != E; ) 273 // Increment in loop to prevent using deallocated memory. 274 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 275 R->Destroy(*this); 276 277 for (llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*>::iterator 278 I = ASTRecordLayouts.begin(), E = ASTRecordLayouts.end(); I != E; ) { 279 // Increment in loop to prevent using deallocated memory. 280 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 281 R->Destroy(*this); 282 } 283 284 for (llvm::DenseMap<const Decl*, AttrVec*>::iterator A = DeclAttrs.begin(), 285 AEnd = DeclAttrs.end(); 286 A != AEnd; ++A) 287 A->second->~AttrVec(); 288} 289 290void ASTContext::AddDeallocation(void (*Callback)(void*), void *Data) { 291 Deallocations.push_back(std::make_pair(Callback, Data)); 292} 293 294void 295ASTContext::setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source) { 296 ExternalSource.reset(Source.take()); 297} 298 299void ASTContext::PrintStats() const { 300 llvm::errs() << "\n*** AST Context Stats:\n"; 301 llvm::errs() << " " << Types.size() << " types total.\n"; 302 303 unsigned counts[] = { 304#define TYPE(Name, Parent) 0, 305#define ABSTRACT_TYPE(Name, Parent) 306#include "clang/AST/TypeNodes.def" 307 0 // Extra 308 }; 309 310 for (unsigned i = 0, e = Types.size(); i != e; ++i) { 311 Type *T = Types[i]; 312 counts[(unsigned)T->getTypeClass()]++; 313 } 314 315 unsigned Idx = 0; 316 unsigned TotalBytes = 0; 317#define TYPE(Name, Parent) \ 318 if (counts[Idx]) \ 319 llvm::errs() << " " << counts[Idx] << " " << #Name \ 320 << " types\n"; \ 321 TotalBytes += counts[Idx] * sizeof(Name##Type); \ 322 ++Idx; 323#define ABSTRACT_TYPE(Name, Parent) 324#include "clang/AST/TypeNodes.def" 325 326 llvm::errs() << "Total bytes = " << TotalBytes << "\n"; 327 328 // Implicit special member functions. 329 llvm::errs() << NumImplicitDefaultConstructorsDeclared << "/" 330 << NumImplicitDefaultConstructors 331 << " implicit default constructors created\n"; 332 llvm::errs() << NumImplicitCopyConstructorsDeclared << "/" 333 << NumImplicitCopyConstructors 334 << " implicit copy constructors created\n"; 335 if (getLangOptions().CPlusPlus) 336 llvm::errs() << NumImplicitMoveConstructorsDeclared << "/" 337 << NumImplicitMoveConstructors 338 << " implicit move constructors created\n"; 339 llvm::errs() << NumImplicitCopyAssignmentOperatorsDeclared << "/" 340 << NumImplicitCopyAssignmentOperators 341 << " implicit copy assignment operators created\n"; 342 if (getLangOptions().CPlusPlus) 343 llvm::errs() << NumImplicitMoveAssignmentOperatorsDeclared << "/" 344 << NumImplicitMoveAssignmentOperators 345 << " implicit move assignment operators created\n"; 346 llvm::errs() << NumImplicitDestructorsDeclared << "/" 347 << NumImplicitDestructors 348 << " implicit destructors created\n"; 349 350 if (ExternalSource.get()) { 351 llvm::errs() << "\n"; 352 ExternalSource->PrintStats(); 353 } 354 355 BumpAlloc.PrintStats(); 356} 357 358TypedefDecl *ASTContext::getInt128Decl() const { 359 if (!Int128Decl) { 360 TypeSourceInfo *TInfo = getTrivialTypeSourceInfo(Int128Ty); 361 Int128Decl = TypedefDecl::Create(const_cast<ASTContext &>(*this), 362 getTranslationUnitDecl(), 363 SourceLocation(), 364 SourceLocation(), 365 &Idents.get("__int128_t"), 366 TInfo); 367 } 368 369 return Int128Decl; 370} 371 372TypedefDecl *ASTContext::getUInt128Decl() const { 373 if (!UInt128Decl) { 374 TypeSourceInfo *TInfo = getTrivialTypeSourceInfo(UnsignedInt128Ty); 375 UInt128Decl = TypedefDecl::Create(const_cast<ASTContext &>(*this), 376 getTranslationUnitDecl(), 377 SourceLocation(), 378 SourceLocation(), 379 &Idents.get("__uint128_t"), 380 TInfo); 381 } 382 383 return UInt128Decl; 384} 385 386void ASTContext::InitBuiltinType(CanQualType &R, BuiltinType::Kind K) { 387 BuiltinType *Ty = new (*this, TypeAlignment) BuiltinType(K); 388 R = CanQualType::CreateUnsafe(QualType(Ty, 0)); 389 Types.push_back(Ty); 390} 391 392void ASTContext::InitBuiltinTypes(const TargetInfo &Target) { 393 assert((!this->Target || this->Target == &Target) && 394 "Incorrect target reinitialization"); 395 assert(VoidTy.isNull() && "Context reinitialized?"); 396 397 this->Target = &Target; 398 399 ABI.reset(createCXXABI(Target)); 400 AddrSpaceMap = getAddressSpaceMap(Target, LangOpts); 401 402 // C99 6.2.5p19. 403 InitBuiltinType(VoidTy, BuiltinType::Void); 404 405 // C99 6.2.5p2. 406 InitBuiltinType(BoolTy, BuiltinType::Bool); 407 // C99 6.2.5p3. 408 if (LangOpts.CharIsSigned) 409 InitBuiltinType(CharTy, BuiltinType::Char_S); 410 else 411 InitBuiltinType(CharTy, BuiltinType::Char_U); 412 // C99 6.2.5p4. 413 InitBuiltinType(SignedCharTy, BuiltinType::SChar); 414 InitBuiltinType(ShortTy, BuiltinType::Short); 415 InitBuiltinType(IntTy, BuiltinType::Int); 416 InitBuiltinType(LongTy, BuiltinType::Long); 417 InitBuiltinType(LongLongTy, BuiltinType::LongLong); 418 419 // C99 6.2.5p6. 420 InitBuiltinType(UnsignedCharTy, BuiltinType::UChar); 421 InitBuiltinType(UnsignedShortTy, BuiltinType::UShort); 422 InitBuiltinType(UnsignedIntTy, BuiltinType::UInt); 423 InitBuiltinType(UnsignedLongTy, BuiltinType::ULong); 424 InitBuiltinType(UnsignedLongLongTy, BuiltinType::ULongLong); 425 426 // C99 6.2.5p10. 427 InitBuiltinType(FloatTy, BuiltinType::Float); 428 InitBuiltinType(DoubleTy, BuiltinType::Double); 429 InitBuiltinType(LongDoubleTy, BuiltinType::LongDouble); 430 431 // GNU extension, 128-bit integers. 432 InitBuiltinType(Int128Ty, BuiltinType::Int128); 433 InitBuiltinType(UnsignedInt128Ty, BuiltinType::UInt128); 434 435 if (LangOpts.CPlusPlus) { // C++ 3.9.1p5 436 if (TargetInfo::isTypeSigned(Target.getWCharType())) 437 InitBuiltinType(WCharTy, BuiltinType::WChar_S); 438 else // -fshort-wchar makes wchar_t be unsigned. 439 InitBuiltinType(WCharTy, BuiltinType::WChar_U); 440 } else // C99 441 WCharTy = getFromTargetType(Target.getWCharType()); 442 443 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 444 InitBuiltinType(Char16Ty, BuiltinType::Char16); 445 else // C99 446 Char16Ty = getFromTargetType(Target.getChar16Type()); 447 448 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 449 InitBuiltinType(Char32Ty, BuiltinType::Char32); 450 else // C99 451 Char32Ty = getFromTargetType(Target.getChar32Type()); 452 453 // Placeholder type for type-dependent expressions whose type is 454 // completely unknown. No code should ever check a type against 455 // DependentTy and users should never see it; however, it is here to 456 // help diagnose failures to properly check for type-dependent 457 // expressions. 458 InitBuiltinType(DependentTy, BuiltinType::Dependent); 459 460 // Placeholder type for functions. 461 InitBuiltinType(OverloadTy, BuiltinType::Overload); 462 463 // Placeholder type for bound members. 464 InitBuiltinType(BoundMemberTy, BuiltinType::BoundMember); 465 466 // Placeholder type for pseudo-objects. 467 InitBuiltinType(PseudoObjectTy, BuiltinType::PseudoObject); 468 469 // "any" type; useful for debugger-like clients. 470 InitBuiltinType(UnknownAnyTy, BuiltinType::UnknownAny); 471 472 // Placeholder type for unbridged ARC casts. 473 InitBuiltinType(ARCUnbridgedCastTy, BuiltinType::ARCUnbridgedCast); 474 475 // C99 6.2.5p11. 476 FloatComplexTy = getComplexType(FloatTy); 477 DoubleComplexTy = getComplexType(DoubleTy); 478 LongDoubleComplexTy = getComplexType(LongDoubleTy); 479 480 BuiltinVaListType = QualType(); 481 482 // Builtin types for 'id', 'Class', and 'SEL'. 483 InitBuiltinType(ObjCBuiltinIdTy, BuiltinType::ObjCId); 484 InitBuiltinType(ObjCBuiltinClassTy, BuiltinType::ObjCClass); 485 InitBuiltinType(ObjCBuiltinSelTy, BuiltinType::ObjCSel); 486 487 ObjCConstantStringType = QualType(); 488 489 // void * type 490 VoidPtrTy = getPointerType(VoidTy); 491 492 // nullptr type (C++0x 2.14.7) 493 InitBuiltinType(NullPtrTy, BuiltinType::NullPtr); 494 495 // half type (OpenCL 6.1.1.1) / ARM NEON __fp16 496 InitBuiltinType(HalfTy, BuiltinType::Half); 497} 498 499DiagnosticsEngine &ASTContext::getDiagnostics() const { 500 return SourceMgr.getDiagnostics(); 501} 502 503AttrVec& ASTContext::getDeclAttrs(const Decl *D) { 504 AttrVec *&Result = DeclAttrs[D]; 505 if (!Result) { 506 void *Mem = Allocate(sizeof(AttrVec)); 507 Result = new (Mem) AttrVec; 508 } 509 510 return *Result; 511} 512 513/// \brief Erase the attributes corresponding to the given declaration. 514void ASTContext::eraseDeclAttrs(const Decl *D) { 515 llvm::DenseMap<const Decl*, AttrVec*>::iterator Pos = DeclAttrs.find(D); 516 if (Pos != DeclAttrs.end()) { 517 Pos->second->~AttrVec(); 518 DeclAttrs.erase(Pos); 519 } 520} 521 522MemberSpecializationInfo * 523ASTContext::getInstantiatedFromStaticDataMember(const VarDecl *Var) { 524 assert(Var->isStaticDataMember() && "Not a static data member"); 525 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *>::iterator Pos 526 = InstantiatedFromStaticDataMember.find(Var); 527 if (Pos == InstantiatedFromStaticDataMember.end()) 528 return 0; 529 530 return Pos->second; 531} 532 533void 534ASTContext::setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 535 TemplateSpecializationKind TSK, 536 SourceLocation PointOfInstantiation) { 537 assert(Inst->isStaticDataMember() && "Not a static data member"); 538 assert(Tmpl->isStaticDataMember() && "Not a static data member"); 539 assert(!InstantiatedFromStaticDataMember[Inst] && 540 "Already noted what static data member was instantiated from"); 541 InstantiatedFromStaticDataMember[Inst] 542 = new (*this) MemberSpecializationInfo(Tmpl, TSK, PointOfInstantiation); 543} 544 545FunctionDecl *ASTContext::getClassScopeSpecializationPattern( 546 const FunctionDecl *FD){ 547 assert(FD && "Specialization is 0"); 548 llvm::DenseMap<const FunctionDecl*, FunctionDecl *>::const_iterator Pos 549 = ClassScopeSpecializationPattern.find(FD); 550 if (Pos == ClassScopeSpecializationPattern.end()) 551 return 0; 552 553 return Pos->second; 554} 555 556void ASTContext::setClassScopeSpecializationPattern(FunctionDecl *FD, 557 FunctionDecl *Pattern) { 558 assert(FD && "Specialization is 0"); 559 assert(Pattern && "Class scope specialization pattern is 0"); 560 ClassScopeSpecializationPattern[FD] = Pattern; 561} 562 563NamedDecl * 564ASTContext::getInstantiatedFromUsingDecl(UsingDecl *UUD) { 565 llvm::DenseMap<UsingDecl *, NamedDecl *>::const_iterator Pos 566 = InstantiatedFromUsingDecl.find(UUD); 567 if (Pos == InstantiatedFromUsingDecl.end()) 568 return 0; 569 570 return Pos->second; 571} 572 573void 574ASTContext::setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern) { 575 assert((isa<UsingDecl>(Pattern) || 576 isa<UnresolvedUsingValueDecl>(Pattern) || 577 isa<UnresolvedUsingTypenameDecl>(Pattern)) && 578 "pattern decl is not a using decl"); 579 assert(!InstantiatedFromUsingDecl[Inst] && "pattern already exists"); 580 InstantiatedFromUsingDecl[Inst] = Pattern; 581} 582 583UsingShadowDecl * 584ASTContext::getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst) { 585 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*>::const_iterator Pos 586 = InstantiatedFromUsingShadowDecl.find(Inst); 587 if (Pos == InstantiatedFromUsingShadowDecl.end()) 588 return 0; 589 590 return Pos->second; 591} 592 593void 594ASTContext::setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 595 UsingShadowDecl *Pattern) { 596 assert(!InstantiatedFromUsingShadowDecl[Inst] && "pattern already exists"); 597 InstantiatedFromUsingShadowDecl[Inst] = Pattern; 598} 599 600FieldDecl *ASTContext::getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field) { 601 llvm::DenseMap<FieldDecl *, FieldDecl *>::iterator Pos 602 = InstantiatedFromUnnamedFieldDecl.find(Field); 603 if (Pos == InstantiatedFromUnnamedFieldDecl.end()) 604 return 0; 605 606 return Pos->second; 607} 608 609void ASTContext::setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, 610 FieldDecl *Tmpl) { 611 assert(!Inst->getDeclName() && "Instantiated field decl is not unnamed"); 612 assert(!Tmpl->getDeclName() && "Template field decl is not unnamed"); 613 assert(!InstantiatedFromUnnamedFieldDecl[Inst] && 614 "Already noted what unnamed field was instantiated from"); 615 616 InstantiatedFromUnnamedFieldDecl[Inst] = Tmpl; 617} 618 619bool ASTContext::ZeroBitfieldFollowsNonBitfield(const FieldDecl *FD, 620 const FieldDecl *LastFD) const { 621 return (FD->isBitField() && LastFD && !LastFD->isBitField() && 622 FD->getBitWidthValue(*this) == 0); 623} 624 625bool ASTContext::ZeroBitfieldFollowsBitfield(const FieldDecl *FD, 626 const FieldDecl *LastFD) const { 627 return (FD->isBitField() && LastFD && LastFD->isBitField() && 628 FD->getBitWidthValue(*this) == 0 && 629 LastFD->getBitWidthValue(*this) != 0); 630} 631 632bool ASTContext::BitfieldFollowsBitfield(const FieldDecl *FD, 633 const FieldDecl *LastFD) const { 634 return (FD->isBitField() && LastFD && LastFD->isBitField() && 635 FD->getBitWidthValue(*this) && 636 LastFD->getBitWidthValue(*this)); 637} 638 639bool ASTContext::NonBitfieldFollowsBitfield(const FieldDecl *FD, 640 const FieldDecl *LastFD) const { 641 return (!FD->isBitField() && LastFD && LastFD->isBitField() && 642 LastFD->getBitWidthValue(*this)); 643} 644 645bool ASTContext::BitfieldFollowsNonBitfield(const FieldDecl *FD, 646 const FieldDecl *LastFD) const { 647 return (FD->isBitField() && LastFD && !LastFD->isBitField() && 648 FD->getBitWidthValue(*this)); 649} 650 651ASTContext::overridden_cxx_method_iterator 652ASTContext::overridden_methods_begin(const CXXMethodDecl *Method) const { 653 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 654 = OverriddenMethods.find(Method); 655 if (Pos == OverriddenMethods.end()) 656 return 0; 657 658 return Pos->second.begin(); 659} 660 661ASTContext::overridden_cxx_method_iterator 662ASTContext::overridden_methods_end(const CXXMethodDecl *Method) const { 663 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 664 = OverriddenMethods.find(Method); 665 if (Pos == OverriddenMethods.end()) 666 return 0; 667 668 return Pos->second.end(); 669} 670 671unsigned 672ASTContext::overridden_methods_size(const CXXMethodDecl *Method) const { 673 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 674 = OverriddenMethods.find(Method); 675 if (Pos == OverriddenMethods.end()) 676 return 0; 677 678 return Pos->second.size(); 679} 680 681void ASTContext::addOverriddenMethod(const CXXMethodDecl *Method, 682 const CXXMethodDecl *Overridden) { 683 OverriddenMethods[Method].push_back(Overridden); 684} 685 686void ASTContext::addedLocalImportDecl(ImportDecl *Import) { 687 assert(!Import->NextLocalImport && "Import declaration already in the chain"); 688 assert(!Import->isFromASTFile() && "Non-local import declaration"); 689 if (!FirstLocalImport) { 690 FirstLocalImport = Import; 691 LastLocalImport = Import; 692 return; 693 } 694 695 LastLocalImport->NextLocalImport = Import; 696 LastLocalImport = Import; 697} 698 699//===----------------------------------------------------------------------===// 700// Type Sizing and Analysis 701//===----------------------------------------------------------------------===// 702 703/// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 704/// scalar floating point type. 705const llvm::fltSemantics &ASTContext::getFloatTypeSemantics(QualType T) const { 706 const BuiltinType *BT = T->getAs<BuiltinType>(); 707 assert(BT && "Not a floating point type!"); 708 switch (BT->getKind()) { 709 default: llvm_unreachable("Not a floating point type!"); 710 case BuiltinType::Half: return Target->getHalfFormat(); 711 case BuiltinType::Float: return Target->getFloatFormat(); 712 case BuiltinType::Double: return Target->getDoubleFormat(); 713 case BuiltinType::LongDouble: return Target->getLongDoubleFormat(); 714 } 715} 716 717/// getDeclAlign - Return a conservative estimate of the alignment of the 718/// specified decl. Note that bitfields do not have a valid alignment, so 719/// this method will assert on them. 720/// If @p RefAsPointee, references are treated like their underlying type 721/// (for alignof), else they're treated like pointers (for CodeGen). 722CharUnits ASTContext::getDeclAlign(const Decl *D, bool RefAsPointee) const { 723 unsigned Align = Target->getCharWidth(); 724 725 bool UseAlignAttrOnly = false; 726 if (unsigned AlignFromAttr = D->getMaxAlignment()) { 727 Align = AlignFromAttr; 728 729 // __attribute__((aligned)) can increase or decrease alignment 730 // *except* on a struct or struct member, where it only increases 731 // alignment unless 'packed' is also specified. 732 // 733 // It is an error for alignas to decrease alignment, so we can 734 // ignore that possibility; Sema should diagnose it. 735 if (isa<FieldDecl>(D)) { 736 UseAlignAttrOnly = D->hasAttr<PackedAttr>() || 737 cast<FieldDecl>(D)->getParent()->hasAttr<PackedAttr>(); 738 } else { 739 UseAlignAttrOnly = true; 740 } 741 } 742 else if (isa<FieldDecl>(D)) 743 UseAlignAttrOnly = 744 D->hasAttr<PackedAttr>() || 745 cast<FieldDecl>(D)->getParent()->hasAttr<PackedAttr>(); 746 747 // If we're using the align attribute only, just ignore everything 748 // else about the declaration and its type. 749 if (UseAlignAttrOnly) { 750 // do nothing 751 752 } else if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) { 753 QualType T = VD->getType(); 754 if (const ReferenceType* RT = T->getAs<ReferenceType>()) { 755 if (RefAsPointee) 756 T = RT->getPointeeType(); 757 else 758 T = getPointerType(RT->getPointeeType()); 759 } 760 if (!T->isIncompleteType() && !T->isFunctionType()) { 761 // Adjust alignments of declarations with array type by the 762 // large-array alignment on the target. 763 unsigned MinWidth = Target->getLargeArrayMinWidth(); 764 const ArrayType *arrayType; 765 if (MinWidth && (arrayType = getAsArrayType(T))) { 766 if (isa<VariableArrayType>(arrayType)) 767 Align = std::max(Align, Target->getLargeArrayAlign()); 768 else if (isa<ConstantArrayType>(arrayType) && 769 MinWidth <= getTypeSize(cast<ConstantArrayType>(arrayType))) 770 Align = std::max(Align, Target->getLargeArrayAlign()); 771 772 // Walk through any array types while we're at it. 773 T = getBaseElementType(arrayType); 774 } 775 Align = std::max(Align, getPreferredTypeAlign(T.getTypePtr())); 776 } 777 778 // Fields can be subject to extra alignment constraints, like if 779 // the field is packed, the struct is packed, or the struct has a 780 // a max-field-alignment constraint (#pragma pack). So calculate 781 // the actual alignment of the field within the struct, and then 782 // (as we're expected to) constrain that by the alignment of the type. 783 if (const FieldDecl *field = dyn_cast<FieldDecl>(VD)) { 784 // So calculate the alignment of the field. 785 const ASTRecordLayout &layout = getASTRecordLayout(field->getParent()); 786 787 // Start with the record's overall alignment. 788 unsigned fieldAlign = toBits(layout.getAlignment()); 789 790 // Use the GCD of that and the offset within the record. 791 uint64_t offset = layout.getFieldOffset(field->getFieldIndex()); 792 if (offset > 0) { 793 // Alignment is always a power of 2, so the GCD will be a power of 2, 794 // which means we get to do this crazy thing instead of Euclid's. 795 uint64_t lowBitOfOffset = offset & (~offset + 1); 796 if (lowBitOfOffset < fieldAlign) 797 fieldAlign = static_cast<unsigned>(lowBitOfOffset); 798 } 799 800 Align = std::min(Align, fieldAlign); 801 } 802 } 803 804 return toCharUnitsFromBits(Align); 805} 806 807std::pair<CharUnits, CharUnits> 808ASTContext::getTypeInfoInChars(const Type *T) const { 809 std::pair<uint64_t, unsigned> Info = getTypeInfo(T); 810 return std::make_pair(toCharUnitsFromBits(Info.first), 811 toCharUnitsFromBits(Info.second)); 812} 813 814std::pair<CharUnits, CharUnits> 815ASTContext::getTypeInfoInChars(QualType T) const { 816 return getTypeInfoInChars(T.getTypePtr()); 817} 818 819/// getTypeSize - Return the size of the specified type, in bits. This method 820/// does not work on incomplete types. 821/// 822/// FIXME: Pointers into different addr spaces could have different sizes and 823/// alignment requirements: getPointerInfo should take an AddrSpace, this 824/// should take a QualType, &c. 825std::pair<uint64_t, unsigned> 826ASTContext::getTypeInfo(const Type *T) const { 827 uint64_t Width=0; 828 unsigned Align=8; 829 switch (T->getTypeClass()) { 830#define TYPE(Class, Base) 831#define ABSTRACT_TYPE(Class, Base) 832#define NON_CANONICAL_TYPE(Class, Base) 833#define DEPENDENT_TYPE(Class, Base) case Type::Class: 834#include "clang/AST/TypeNodes.def" 835 llvm_unreachable("Should not see dependent types"); 836 837 case Type::FunctionNoProto: 838 case Type::FunctionProto: 839 // GCC extension: alignof(function) = 32 bits 840 Width = 0; 841 Align = 32; 842 break; 843 844 case Type::IncompleteArray: 845 case Type::VariableArray: 846 Width = 0; 847 Align = getTypeAlign(cast<ArrayType>(T)->getElementType()); 848 break; 849 850 case Type::ConstantArray: { 851 const ConstantArrayType *CAT = cast<ConstantArrayType>(T); 852 853 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(CAT->getElementType()); 854 uint64_t Size = CAT->getSize().getZExtValue(); 855 assert((Size == 0 || EltInfo.first <= (uint64_t)(-1)/Size) && "Overflow in array type bit size evaluation"); 856 Width = EltInfo.first*Size; 857 Align = EltInfo.second; 858 Width = llvm::RoundUpToAlignment(Width, Align); 859 break; 860 } 861 case Type::ExtVector: 862 case Type::Vector: { 863 const VectorType *VT = cast<VectorType>(T); 864 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(VT->getElementType()); 865 Width = EltInfo.first*VT->getNumElements(); 866 Align = Width; 867 // If the alignment is not a power of 2, round up to the next power of 2. 868 // This happens for non-power-of-2 length vectors. 869 if (Align & (Align-1)) { 870 Align = llvm::NextPowerOf2(Align); 871 Width = llvm::RoundUpToAlignment(Width, Align); 872 } 873 break; 874 } 875 876 case Type::Builtin: 877 switch (cast<BuiltinType>(T)->getKind()) { 878 default: llvm_unreachable("Unknown builtin type!"); 879 case BuiltinType::Void: 880 // GCC extension: alignof(void) = 8 bits. 881 Width = 0; 882 Align = 8; 883 break; 884 885 case BuiltinType::Bool: 886 Width = Target->getBoolWidth(); 887 Align = Target->getBoolAlign(); 888 break; 889 case BuiltinType::Char_S: 890 case BuiltinType::Char_U: 891 case BuiltinType::UChar: 892 case BuiltinType::SChar: 893 Width = Target->getCharWidth(); 894 Align = Target->getCharAlign(); 895 break; 896 case BuiltinType::WChar_S: 897 case BuiltinType::WChar_U: 898 Width = Target->getWCharWidth(); 899 Align = Target->getWCharAlign(); 900 break; 901 case BuiltinType::Char16: 902 Width = Target->getChar16Width(); 903 Align = Target->getChar16Align(); 904 break; 905 case BuiltinType::Char32: 906 Width = Target->getChar32Width(); 907 Align = Target->getChar32Align(); 908 break; 909 case BuiltinType::UShort: 910 case BuiltinType::Short: 911 Width = Target->getShortWidth(); 912 Align = Target->getShortAlign(); 913 break; 914 case BuiltinType::UInt: 915 case BuiltinType::Int: 916 Width = Target->getIntWidth(); 917 Align = Target->getIntAlign(); 918 break; 919 case BuiltinType::ULong: 920 case BuiltinType::Long: 921 Width = Target->getLongWidth(); 922 Align = Target->getLongAlign(); 923 break; 924 case BuiltinType::ULongLong: 925 case BuiltinType::LongLong: 926 Width = Target->getLongLongWidth(); 927 Align = Target->getLongLongAlign(); 928 break; 929 case BuiltinType::Int128: 930 case BuiltinType::UInt128: 931 Width = 128; 932 Align = 128; // int128_t is 128-bit aligned on all targets. 933 break; 934 case BuiltinType::Half: 935 Width = Target->getHalfWidth(); 936 Align = Target->getHalfAlign(); 937 break; 938 case BuiltinType::Float: 939 Width = Target->getFloatWidth(); 940 Align = Target->getFloatAlign(); 941 break; 942 case BuiltinType::Double: 943 Width = Target->getDoubleWidth(); 944 Align = Target->getDoubleAlign(); 945 break; 946 case BuiltinType::LongDouble: 947 Width = Target->getLongDoubleWidth(); 948 Align = Target->getLongDoubleAlign(); 949 break; 950 case BuiltinType::NullPtr: 951 Width = Target->getPointerWidth(0); // C++ 3.9.1p11: sizeof(nullptr_t) 952 Align = Target->getPointerAlign(0); // == sizeof(void*) 953 break; 954 case BuiltinType::ObjCId: 955 case BuiltinType::ObjCClass: 956 case BuiltinType::ObjCSel: 957 Width = Target->getPointerWidth(0); 958 Align = Target->getPointerAlign(0); 959 break; 960 } 961 break; 962 case Type::ObjCObjectPointer: 963 Width = Target->getPointerWidth(0); 964 Align = Target->getPointerAlign(0); 965 break; 966 case Type::BlockPointer: { 967 unsigned AS = getTargetAddressSpace( 968 cast<BlockPointerType>(T)->getPointeeType()); 969 Width = Target->getPointerWidth(AS); 970 Align = Target->getPointerAlign(AS); 971 break; 972 } 973 case Type::LValueReference: 974 case Type::RValueReference: { 975 // alignof and sizeof should never enter this code path here, so we go 976 // the pointer route. 977 unsigned AS = getTargetAddressSpace( 978 cast<ReferenceType>(T)->getPointeeType()); 979 Width = Target->getPointerWidth(AS); 980 Align = Target->getPointerAlign(AS); 981 break; 982 } 983 case Type::Pointer: { 984 unsigned AS = getTargetAddressSpace(cast<PointerType>(T)->getPointeeType()); 985 Width = Target->getPointerWidth(AS); 986 Align = Target->getPointerAlign(AS); 987 break; 988 } 989 case Type::MemberPointer: { 990 const MemberPointerType *MPT = cast<MemberPointerType>(T); 991 std::pair<uint64_t, unsigned> PtrDiffInfo = 992 getTypeInfo(getPointerDiffType()); 993 Width = PtrDiffInfo.first * ABI->getMemberPointerSize(MPT); 994 Align = PtrDiffInfo.second; 995 break; 996 } 997 case Type::Complex: { 998 // Complex types have the same alignment as their elements, but twice the 999 // size. 1000 std::pair<uint64_t, unsigned> EltInfo = 1001 getTypeInfo(cast<ComplexType>(T)->getElementType()); 1002 Width = EltInfo.first*2; 1003 Align = EltInfo.second; 1004 break; 1005 } 1006 case Type::ObjCObject: 1007 return getTypeInfo(cast<ObjCObjectType>(T)->getBaseType().getTypePtr()); 1008 case Type::ObjCInterface: { 1009 const ObjCInterfaceType *ObjCI = cast<ObjCInterfaceType>(T); 1010 const ASTRecordLayout &Layout = getASTObjCInterfaceLayout(ObjCI->getDecl()); 1011 Width = toBits(Layout.getSize()); 1012 Align = toBits(Layout.getAlignment()); 1013 break; 1014 } 1015 case Type::Record: 1016 case Type::Enum: { 1017 const TagType *TT = cast<TagType>(T); 1018 1019 if (TT->getDecl()->isInvalidDecl()) { 1020 Width = 8; 1021 Align = 8; 1022 break; 1023 } 1024 1025 if (const EnumType *ET = dyn_cast<EnumType>(TT)) 1026 return getTypeInfo(ET->getDecl()->getIntegerType()); 1027 1028 const RecordType *RT = cast<RecordType>(TT); 1029 const ASTRecordLayout &Layout = getASTRecordLayout(RT->getDecl()); 1030 Width = toBits(Layout.getSize()); 1031 Align = toBits(Layout.getAlignment()); 1032 break; 1033 } 1034 1035 case Type::SubstTemplateTypeParm: 1036 return getTypeInfo(cast<SubstTemplateTypeParmType>(T)-> 1037 getReplacementType().getTypePtr()); 1038 1039 case Type::Auto: { 1040 const AutoType *A = cast<AutoType>(T); 1041 assert(A->isDeduced() && "Cannot request the size of a dependent type"); 1042 return getTypeInfo(A->getDeducedType().getTypePtr()); 1043 } 1044 1045 case Type::Paren: 1046 return getTypeInfo(cast<ParenType>(T)->getInnerType().getTypePtr()); 1047 1048 case Type::Typedef: { 1049 const TypedefNameDecl *Typedef = cast<TypedefType>(T)->getDecl(); 1050 std::pair<uint64_t, unsigned> Info 1051 = getTypeInfo(Typedef->getUnderlyingType().getTypePtr()); 1052 // If the typedef has an aligned attribute on it, it overrides any computed 1053 // alignment we have. This violates the GCC documentation (which says that 1054 // attribute(aligned) can only round up) but matches its implementation. 1055 if (unsigned AttrAlign = Typedef->getMaxAlignment()) 1056 Align = AttrAlign; 1057 else 1058 Align = Info.second; 1059 Width = Info.first; 1060 break; 1061 } 1062 1063 case Type::TypeOfExpr: 1064 return getTypeInfo(cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType() 1065 .getTypePtr()); 1066 1067 case Type::TypeOf: 1068 return getTypeInfo(cast<TypeOfType>(T)->getUnderlyingType().getTypePtr()); 1069 1070 case Type::Decltype: 1071 return getTypeInfo(cast<DecltypeType>(T)->getUnderlyingExpr()->getType() 1072 .getTypePtr()); 1073 1074 case Type::UnaryTransform: 1075 return getTypeInfo(cast<UnaryTransformType>(T)->getUnderlyingType()); 1076 1077 case Type::Elaborated: 1078 return getTypeInfo(cast<ElaboratedType>(T)->getNamedType().getTypePtr()); 1079 1080 case Type::Attributed: 1081 return getTypeInfo( 1082 cast<AttributedType>(T)->getEquivalentType().getTypePtr()); 1083 1084 case Type::TemplateSpecialization: { 1085 assert(getCanonicalType(T) != T && 1086 "Cannot request the size of a dependent type"); 1087 const TemplateSpecializationType *TST = cast<TemplateSpecializationType>(T); 1088 // A type alias template specialization may refer to a typedef with the 1089 // aligned attribute on it. 1090 if (TST->isTypeAlias()) 1091 return getTypeInfo(TST->getAliasedType().getTypePtr()); 1092 else 1093 return getTypeInfo(getCanonicalType(T)); 1094 } 1095 1096 case Type::Atomic: { 1097 std::pair<uint64_t, unsigned> Info 1098 = getTypeInfo(cast<AtomicType>(T)->getValueType()); 1099 Width = Info.first; 1100 Align = Info.second; 1101 if (Width != 0 && Width <= Target->getMaxAtomicPromoteWidth() && 1102 llvm::isPowerOf2_64(Width)) { 1103 // We can potentially perform lock-free atomic operations for this 1104 // type; promote the alignment appropriately. 1105 // FIXME: We could potentially promote the width here as well... 1106 // is that worthwhile? (Non-struct atomic types generally have 1107 // power-of-two size anyway, but structs might not. Requires a bit 1108 // of implementation work to make sure we zero out the extra bits.) 1109 Align = static_cast<unsigned>(Width); 1110 } 1111 } 1112 1113 } 1114 1115 assert(llvm::isPowerOf2_32(Align) && "Alignment must be power of 2"); 1116 return std::make_pair(Width, Align); 1117} 1118 1119/// toCharUnitsFromBits - Convert a size in bits to a size in characters. 1120CharUnits ASTContext::toCharUnitsFromBits(int64_t BitSize) const { 1121 return CharUnits::fromQuantity(BitSize / getCharWidth()); 1122} 1123 1124/// toBits - Convert a size in characters to a size in characters. 1125int64_t ASTContext::toBits(CharUnits CharSize) const { 1126 return CharSize.getQuantity() * getCharWidth(); 1127} 1128 1129/// getTypeSizeInChars - Return the size of the specified type, in characters. 1130/// This method does not work on incomplete types. 1131CharUnits ASTContext::getTypeSizeInChars(QualType T) const { 1132 return toCharUnitsFromBits(getTypeSize(T)); 1133} 1134CharUnits ASTContext::getTypeSizeInChars(const Type *T) const { 1135 return toCharUnitsFromBits(getTypeSize(T)); 1136} 1137 1138/// getTypeAlignInChars - Return the ABI-specified alignment of a type, in 1139/// characters. This method does not work on incomplete types. 1140CharUnits ASTContext::getTypeAlignInChars(QualType T) const { 1141 return toCharUnitsFromBits(getTypeAlign(T)); 1142} 1143CharUnits ASTContext::getTypeAlignInChars(const Type *T) const { 1144 return toCharUnitsFromBits(getTypeAlign(T)); 1145} 1146 1147/// getPreferredTypeAlign - Return the "preferred" alignment of the specified 1148/// type for the current target in bits. This can be different than the ABI 1149/// alignment in cases where it is beneficial for performance to overalign 1150/// a data type. 1151unsigned ASTContext::getPreferredTypeAlign(const Type *T) const { 1152 unsigned ABIAlign = getTypeAlign(T); 1153 1154 // Double and long long should be naturally aligned if possible. 1155 if (const ComplexType* CT = T->getAs<ComplexType>()) 1156 T = CT->getElementType().getTypePtr(); 1157 if (T->isSpecificBuiltinType(BuiltinType::Double) || 1158 T->isSpecificBuiltinType(BuiltinType::LongLong)) 1159 return std::max(ABIAlign, (unsigned)getTypeSize(T)); 1160 1161 return ABIAlign; 1162} 1163 1164/// DeepCollectObjCIvars - 1165/// This routine first collects all declared, but not synthesized, ivars in 1166/// super class and then collects all ivars, including those synthesized for 1167/// current class. This routine is used for implementation of current class 1168/// when all ivars, declared and synthesized are known. 1169/// 1170void ASTContext::DeepCollectObjCIvars(const ObjCInterfaceDecl *OI, 1171 bool leafClass, 1172 SmallVectorImpl<const ObjCIvarDecl*> &Ivars) const { 1173 if (const ObjCInterfaceDecl *SuperClass = OI->getSuperClass()) 1174 DeepCollectObjCIvars(SuperClass, false, Ivars); 1175 if (!leafClass) { 1176 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 1177 E = OI->ivar_end(); I != E; ++I) 1178 Ivars.push_back(*I); 1179 } else { 1180 ObjCInterfaceDecl *IDecl = const_cast<ObjCInterfaceDecl *>(OI); 1181 for (const ObjCIvarDecl *Iv = IDecl->all_declared_ivar_begin(); Iv; 1182 Iv= Iv->getNextIvar()) 1183 Ivars.push_back(Iv); 1184 } 1185} 1186 1187/// CollectInheritedProtocols - Collect all protocols in current class and 1188/// those inherited by it. 1189void ASTContext::CollectInheritedProtocols(const Decl *CDecl, 1190 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols) { 1191 if (const ObjCInterfaceDecl *OI = dyn_cast<ObjCInterfaceDecl>(CDecl)) { 1192 // We can use protocol_iterator here instead of 1193 // all_referenced_protocol_iterator since we are walking all categories. 1194 for (ObjCInterfaceDecl::all_protocol_iterator P = OI->all_referenced_protocol_begin(), 1195 PE = OI->all_referenced_protocol_end(); P != PE; ++P) { 1196 ObjCProtocolDecl *Proto = (*P); 1197 Protocols.insert(Proto->getCanonicalDecl()); 1198 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1199 PE = Proto->protocol_end(); P != PE; ++P) { 1200 Protocols.insert((*P)->getCanonicalDecl()); 1201 CollectInheritedProtocols(*P, Protocols); 1202 } 1203 } 1204 1205 // Categories of this Interface. 1206 for (const ObjCCategoryDecl *CDeclChain = OI->getCategoryList(); 1207 CDeclChain; CDeclChain = CDeclChain->getNextClassCategory()) 1208 CollectInheritedProtocols(CDeclChain, Protocols); 1209 if (ObjCInterfaceDecl *SD = OI->getSuperClass()) 1210 while (SD) { 1211 CollectInheritedProtocols(SD, Protocols); 1212 SD = SD->getSuperClass(); 1213 } 1214 } else if (const ObjCCategoryDecl *OC = dyn_cast<ObjCCategoryDecl>(CDecl)) { 1215 for (ObjCCategoryDecl::protocol_iterator P = OC->protocol_begin(), 1216 PE = OC->protocol_end(); P != PE; ++P) { 1217 ObjCProtocolDecl *Proto = (*P); 1218 Protocols.insert(Proto->getCanonicalDecl()); 1219 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1220 PE = Proto->protocol_end(); P != PE; ++P) 1221 CollectInheritedProtocols(*P, Protocols); 1222 } 1223 } else if (const ObjCProtocolDecl *OP = dyn_cast<ObjCProtocolDecl>(CDecl)) { 1224 for (ObjCProtocolDecl::protocol_iterator P = OP->protocol_begin(), 1225 PE = OP->protocol_end(); P != PE; ++P) { 1226 ObjCProtocolDecl *Proto = (*P); 1227 Protocols.insert(Proto->getCanonicalDecl()); 1228 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1229 PE = Proto->protocol_end(); P != PE; ++P) 1230 CollectInheritedProtocols(*P, Protocols); 1231 } 1232 } 1233} 1234 1235unsigned ASTContext::CountNonClassIvars(const ObjCInterfaceDecl *OI) const { 1236 unsigned count = 0; 1237 // Count ivars declared in class extension. 1238 for (const ObjCCategoryDecl *CDecl = OI->getFirstClassExtension(); CDecl; 1239 CDecl = CDecl->getNextClassExtension()) 1240 count += CDecl->ivar_size(); 1241 1242 // Count ivar defined in this class's implementation. This 1243 // includes synthesized ivars. 1244 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) 1245 count += ImplDecl->ivar_size(); 1246 1247 return count; 1248} 1249 1250/// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 1251ObjCImplementationDecl *ASTContext::getObjCImplementation(ObjCInterfaceDecl *D) { 1252 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 1253 I = ObjCImpls.find(D); 1254 if (I != ObjCImpls.end()) 1255 return cast<ObjCImplementationDecl>(I->second); 1256 return 0; 1257} 1258/// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 1259ObjCCategoryImplDecl *ASTContext::getObjCImplementation(ObjCCategoryDecl *D) { 1260 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 1261 I = ObjCImpls.find(D); 1262 if (I != ObjCImpls.end()) 1263 return cast<ObjCCategoryImplDecl>(I->second); 1264 return 0; 1265} 1266 1267/// \brief Set the implementation of ObjCInterfaceDecl. 1268void ASTContext::setObjCImplementation(ObjCInterfaceDecl *IFaceD, 1269 ObjCImplementationDecl *ImplD) { 1270 assert(IFaceD && ImplD && "Passed null params"); 1271 ObjCImpls[IFaceD] = ImplD; 1272} 1273/// \brief Set the implementation of ObjCCategoryDecl. 1274void ASTContext::setObjCImplementation(ObjCCategoryDecl *CatD, 1275 ObjCCategoryImplDecl *ImplD) { 1276 assert(CatD && ImplD && "Passed null params"); 1277 ObjCImpls[CatD] = ImplD; 1278} 1279 1280ObjCInterfaceDecl *ASTContext::getObjContainingInterface(NamedDecl *ND) const { 1281 if (ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(ND->getDeclContext())) 1282 return ID; 1283 if (ObjCCategoryDecl *CD = dyn_cast<ObjCCategoryDecl>(ND->getDeclContext())) 1284 return CD->getClassInterface(); 1285 if (ObjCImplDecl *IMD = dyn_cast<ObjCImplDecl>(ND->getDeclContext())) 1286 return IMD->getClassInterface(); 1287 1288 return 0; 1289} 1290 1291/// \brief Get the copy initialization expression of VarDecl,or NULL if 1292/// none exists. 1293Expr *ASTContext::getBlockVarCopyInits(const VarDecl*VD) { 1294 assert(VD && "Passed null params"); 1295 assert(VD->hasAttr<BlocksAttr>() && 1296 "getBlockVarCopyInits - not __block var"); 1297 llvm::DenseMap<const VarDecl*, Expr*>::iterator 1298 I = BlockVarCopyInits.find(VD); 1299 return (I != BlockVarCopyInits.end()) ? cast<Expr>(I->second) : 0; 1300} 1301 1302/// \brief Set the copy inialization expression of a block var decl. 1303void ASTContext::setBlockVarCopyInits(VarDecl*VD, Expr* Init) { 1304 assert(VD && Init && "Passed null params"); 1305 assert(VD->hasAttr<BlocksAttr>() && 1306 "setBlockVarCopyInits - not __block var"); 1307 BlockVarCopyInits[VD] = Init; 1308} 1309 1310/// \brief Allocate an uninitialized TypeSourceInfo. 1311/// 1312/// The caller should initialize the memory held by TypeSourceInfo using 1313/// the TypeLoc wrappers. 1314/// 1315/// \param T the type that will be the basis for type source info. This type 1316/// should refer to how the declarator was written in source code, not to 1317/// what type semantic analysis resolved the declarator to. 1318TypeSourceInfo *ASTContext::CreateTypeSourceInfo(QualType T, 1319 unsigned DataSize) const { 1320 if (!DataSize) 1321 DataSize = TypeLoc::getFullDataSizeForType(T); 1322 else 1323 assert(DataSize == TypeLoc::getFullDataSizeForType(T) && 1324 "incorrect data size provided to CreateTypeSourceInfo!"); 1325 1326 TypeSourceInfo *TInfo = 1327 (TypeSourceInfo*)BumpAlloc.Allocate(sizeof(TypeSourceInfo) + DataSize, 8); 1328 new (TInfo) TypeSourceInfo(T); 1329 return TInfo; 1330} 1331 1332TypeSourceInfo *ASTContext::getTrivialTypeSourceInfo(QualType T, 1333 SourceLocation L) const { 1334 TypeSourceInfo *DI = CreateTypeSourceInfo(T); 1335 DI->getTypeLoc().initialize(const_cast<ASTContext &>(*this), L); 1336 return DI; 1337} 1338 1339const ASTRecordLayout & 1340ASTContext::getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) const { 1341 return getObjCLayout(D, 0); 1342} 1343 1344const ASTRecordLayout & 1345ASTContext::getASTObjCImplementationLayout( 1346 const ObjCImplementationDecl *D) const { 1347 return getObjCLayout(D->getClassInterface(), D); 1348} 1349 1350//===----------------------------------------------------------------------===// 1351// Type creation/memoization methods 1352//===----------------------------------------------------------------------===// 1353 1354QualType 1355ASTContext::getExtQualType(const Type *baseType, Qualifiers quals) const { 1356 unsigned fastQuals = quals.getFastQualifiers(); 1357 quals.removeFastQualifiers(); 1358 1359 // Check if we've already instantiated this type. 1360 llvm::FoldingSetNodeID ID; 1361 ExtQuals::Profile(ID, baseType, quals); 1362 void *insertPos = 0; 1363 if (ExtQuals *eq = ExtQualNodes.FindNodeOrInsertPos(ID, insertPos)) { 1364 assert(eq->getQualifiers() == quals); 1365 return QualType(eq, fastQuals); 1366 } 1367 1368 // If the base type is not canonical, make the appropriate canonical type. 1369 QualType canon; 1370 if (!baseType->isCanonicalUnqualified()) { 1371 SplitQualType canonSplit = baseType->getCanonicalTypeInternal().split(); 1372 canonSplit.second.addConsistentQualifiers(quals); 1373 canon = getExtQualType(canonSplit.first, canonSplit.second); 1374 1375 // Re-find the insert position. 1376 (void) ExtQualNodes.FindNodeOrInsertPos(ID, insertPos); 1377 } 1378 1379 ExtQuals *eq = new (*this, TypeAlignment) ExtQuals(baseType, canon, quals); 1380 ExtQualNodes.InsertNode(eq, insertPos); 1381 return QualType(eq, fastQuals); 1382} 1383 1384QualType 1385ASTContext::getAddrSpaceQualType(QualType T, unsigned AddressSpace) const { 1386 QualType CanT = getCanonicalType(T); 1387 if (CanT.getAddressSpace() == AddressSpace) 1388 return T; 1389 1390 // If we are composing extended qualifiers together, merge together 1391 // into one ExtQuals node. 1392 QualifierCollector Quals; 1393 const Type *TypeNode = Quals.strip(T); 1394 1395 // If this type already has an address space specified, it cannot get 1396 // another one. 1397 assert(!Quals.hasAddressSpace() && 1398 "Type cannot be in multiple addr spaces!"); 1399 Quals.addAddressSpace(AddressSpace); 1400 1401 return getExtQualType(TypeNode, Quals); 1402} 1403 1404QualType ASTContext::getObjCGCQualType(QualType T, 1405 Qualifiers::GC GCAttr) const { 1406 QualType CanT = getCanonicalType(T); 1407 if (CanT.getObjCGCAttr() == GCAttr) 1408 return T; 1409 1410 if (const PointerType *ptr = T->getAs<PointerType>()) { 1411 QualType Pointee = ptr->getPointeeType(); 1412 if (Pointee->isAnyPointerType()) { 1413 QualType ResultType = getObjCGCQualType(Pointee, GCAttr); 1414 return getPointerType(ResultType); 1415 } 1416 } 1417 1418 // If we are composing extended qualifiers together, merge together 1419 // into one ExtQuals node. 1420 QualifierCollector Quals; 1421 const Type *TypeNode = Quals.strip(T); 1422 1423 // If this type already has an ObjCGC specified, it cannot get 1424 // another one. 1425 assert(!Quals.hasObjCGCAttr() && 1426 "Type cannot have multiple ObjCGCs!"); 1427 Quals.addObjCGCAttr(GCAttr); 1428 1429 return getExtQualType(TypeNode, Quals); 1430} 1431 1432const FunctionType *ASTContext::adjustFunctionType(const FunctionType *T, 1433 FunctionType::ExtInfo Info) { 1434 if (T->getExtInfo() == Info) 1435 return T; 1436 1437 QualType Result; 1438 if (const FunctionNoProtoType *FNPT = dyn_cast<FunctionNoProtoType>(T)) { 1439 Result = getFunctionNoProtoType(FNPT->getResultType(), Info); 1440 } else { 1441 const FunctionProtoType *FPT = cast<FunctionProtoType>(T); 1442 FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); 1443 EPI.ExtInfo = Info; 1444 Result = getFunctionType(FPT->getResultType(), FPT->arg_type_begin(), 1445 FPT->getNumArgs(), EPI); 1446 } 1447 1448 return cast<FunctionType>(Result.getTypePtr()); 1449} 1450 1451/// getComplexType - Return the uniqued reference to the type for a complex 1452/// number with the specified element type. 1453QualType ASTContext::getComplexType(QualType T) const { 1454 // Unique pointers, to guarantee there is only one pointer of a particular 1455 // structure. 1456 llvm::FoldingSetNodeID ID; 1457 ComplexType::Profile(ID, T); 1458 1459 void *InsertPos = 0; 1460 if (ComplexType *CT = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos)) 1461 return QualType(CT, 0); 1462 1463 // If the pointee type isn't canonical, this won't be a canonical type either, 1464 // so fill in the canonical type field. 1465 QualType Canonical; 1466 if (!T.isCanonical()) { 1467 Canonical = getComplexType(getCanonicalType(T)); 1468 1469 // Get the new insert position for the node we care about. 1470 ComplexType *NewIP = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos); 1471 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1472 } 1473 ComplexType *New = new (*this, TypeAlignment) ComplexType(T, Canonical); 1474 Types.push_back(New); 1475 ComplexTypes.InsertNode(New, InsertPos); 1476 return QualType(New, 0); 1477} 1478 1479/// getPointerType - Return the uniqued reference to the type for a pointer to 1480/// the specified type. 1481QualType ASTContext::getPointerType(QualType T) const { 1482 // Unique pointers, to guarantee there is only one pointer of a particular 1483 // structure. 1484 llvm::FoldingSetNodeID ID; 1485 PointerType::Profile(ID, T); 1486 1487 void *InsertPos = 0; 1488 if (PointerType *PT = PointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1489 return QualType(PT, 0); 1490 1491 // If the pointee type isn't canonical, this won't be a canonical type either, 1492 // so fill in the canonical type field. 1493 QualType Canonical; 1494 if (!T.isCanonical()) { 1495 Canonical = getPointerType(getCanonicalType(T)); 1496 1497 // Get the new insert position for the node we care about. 1498 PointerType *NewIP = PointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1499 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1500 } 1501 PointerType *New = new (*this, TypeAlignment) PointerType(T, Canonical); 1502 Types.push_back(New); 1503 PointerTypes.InsertNode(New, InsertPos); 1504 return QualType(New, 0); 1505} 1506 1507/// getBlockPointerType - Return the uniqued reference to the type for 1508/// a pointer to the specified block. 1509QualType ASTContext::getBlockPointerType(QualType T) const { 1510 assert(T->isFunctionType() && "block of function types only"); 1511 // Unique pointers, to guarantee there is only one block of a particular 1512 // structure. 1513 llvm::FoldingSetNodeID ID; 1514 BlockPointerType::Profile(ID, T); 1515 1516 void *InsertPos = 0; 1517 if (BlockPointerType *PT = 1518 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1519 return QualType(PT, 0); 1520 1521 // If the block pointee type isn't canonical, this won't be a canonical 1522 // type either so fill in the canonical type field. 1523 QualType Canonical; 1524 if (!T.isCanonical()) { 1525 Canonical = getBlockPointerType(getCanonicalType(T)); 1526 1527 // Get the new insert position for the node we care about. 1528 BlockPointerType *NewIP = 1529 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1530 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1531 } 1532 BlockPointerType *New 1533 = new (*this, TypeAlignment) BlockPointerType(T, Canonical); 1534 Types.push_back(New); 1535 BlockPointerTypes.InsertNode(New, InsertPos); 1536 return QualType(New, 0); 1537} 1538 1539/// getLValueReferenceType - Return the uniqued reference to the type for an 1540/// lvalue reference to the specified type. 1541QualType 1542ASTContext::getLValueReferenceType(QualType T, bool SpelledAsLValue) const { 1543 assert(getCanonicalType(T) != OverloadTy && 1544 "Unresolved overloaded function type"); 1545 1546 // Unique pointers, to guarantee there is only one pointer of a particular 1547 // structure. 1548 llvm::FoldingSetNodeID ID; 1549 ReferenceType::Profile(ID, T, SpelledAsLValue); 1550 1551 void *InsertPos = 0; 1552 if (LValueReferenceType *RT = 1553 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1554 return QualType(RT, 0); 1555 1556 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1557 1558 // If the referencee type isn't canonical, this won't be a canonical type 1559 // either, so fill in the canonical type field. 1560 QualType Canonical; 1561 if (!SpelledAsLValue || InnerRef || !T.isCanonical()) { 1562 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1563 Canonical = getLValueReferenceType(getCanonicalType(PointeeType)); 1564 1565 // Get the new insert position for the node we care about. 1566 LValueReferenceType *NewIP = 1567 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1568 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1569 } 1570 1571 LValueReferenceType *New 1572 = new (*this, TypeAlignment) LValueReferenceType(T, Canonical, 1573 SpelledAsLValue); 1574 Types.push_back(New); 1575 LValueReferenceTypes.InsertNode(New, InsertPos); 1576 1577 return QualType(New, 0); 1578} 1579 1580/// getRValueReferenceType - Return the uniqued reference to the type for an 1581/// rvalue reference to the specified type. 1582QualType ASTContext::getRValueReferenceType(QualType T) const { 1583 // Unique pointers, to guarantee there is only one pointer of a particular 1584 // structure. 1585 llvm::FoldingSetNodeID ID; 1586 ReferenceType::Profile(ID, T, false); 1587 1588 void *InsertPos = 0; 1589 if (RValueReferenceType *RT = 1590 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1591 return QualType(RT, 0); 1592 1593 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1594 1595 // If the referencee type isn't canonical, this won't be a canonical type 1596 // either, so fill in the canonical type field. 1597 QualType Canonical; 1598 if (InnerRef || !T.isCanonical()) { 1599 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1600 Canonical = getRValueReferenceType(getCanonicalType(PointeeType)); 1601 1602 // Get the new insert position for the node we care about. 1603 RValueReferenceType *NewIP = 1604 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1605 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1606 } 1607 1608 RValueReferenceType *New 1609 = new (*this, TypeAlignment) RValueReferenceType(T, Canonical); 1610 Types.push_back(New); 1611 RValueReferenceTypes.InsertNode(New, InsertPos); 1612 return QualType(New, 0); 1613} 1614 1615/// getMemberPointerType - Return the uniqued reference to the type for a 1616/// member pointer to the specified type, in the specified class. 1617QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls) const { 1618 // Unique pointers, to guarantee there is only one pointer of a particular 1619 // structure. 1620 llvm::FoldingSetNodeID ID; 1621 MemberPointerType::Profile(ID, T, Cls); 1622 1623 void *InsertPos = 0; 1624 if (MemberPointerType *PT = 1625 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1626 return QualType(PT, 0); 1627 1628 // If the pointee or class type isn't canonical, this won't be a canonical 1629 // type either, so fill in the canonical type field. 1630 QualType Canonical; 1631 if (!T.isCanonical() || !Cls->isCanonicalUnqualified()) { 1632 Canonical = getMemberPointerType(getCanonicalType(T),getCanonicalType(Cls)); 1633 1634 // Get the new insert position for the node we care about. 1635 MemberPointerType *NewIP = 1636 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1637 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1638 } 1639 MemberPointerType *New 1640 = new (*this, TypeAlignment) MemberPointerType(T, Cls, Canonical); 1641 Types.push_back(New); 1642 MemberPointerTypes.InsertNode(New, InsertPos); 1643 return QualType(New, 0); 1644} 1645 1646/// getConstantArrayType - Return the unique reference to the type for an 1647/// array of the specified element type. 1648QualType ASTContext::getConstantArrayType(QualType EltTy, 1649 const llvm::APInt &ArySizeIn, 1650 ArrayType::ArraySizeModifier ASM, 1651 unsigned IndexTypeQuals) const { 1652 assert((EltTy->isDependentType() || 1653 EltTy->isIncompleteType() || EltTy->isConstantSizeType()) && 1654 "Constant array of VLAs is illegal!"); 1655 1656 // Convert the array size into a canonical width matching the pointer size for 1657 // the target. 1658 llvm::APInt ArySize(ArySizeIn); 1659 ArySize = 1660 ArySize.zextOrTrunc(Target->getPointerWidth(getTargetAddressSpace(EltTy))); 1661 1662 llvm::FoldingSetNodeID ID; 1663 ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, IndexTypeQuals); 1664 1665 void *InsertPos = 0; 1666 if (ConstantArrayType *ATP = 1667 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1668 return QualType(ATP, 0); 1669 1670 // If the element type isn't canonical or has qualifiers, this won't 1671 // be a canonical type either, so fill in the canonical type field. 1672 QualType Canon; 1673 if (!EltTy.isCanonical() || EltTy.hasLocalQualifiers()) { 1674 SplitQualType canonSplit = getCanonicalType(EltTy).split(); 1675 Canon = getConstantArrayType(QualType(canonSplit.first, 0), ArySize, 1676 ASM, IndexTypeQuals); 1677 Canon = getQualifiedType(Canon, canonSplit.second); 1678 1679 // Get the new insert position for the node we care about. 1680 ConstantArrayType *NewIP = 1681 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1682 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1683 } 1684 1685 ConstantArrayType *New = new(*this,TypeAlignment) 1686 ConstantArrayType(EltTy, Canon, ArySize, ASM, IndexTypeQuals); 1687 ConstantArrayTypes.InsertNode(New, InsertPos); 1688 Types.push_back(New); 1689 return QualType(New, 0); 1690} 1691 1692/// getVariableArrayDecayedType - Turns the given type, which may be 1693/// variably-modified, into the corresponding type with all the known 1694/// sizes replaced with [*]. 1695QualType ASTContext::getVariableArrayDecayedType(QualType type) const { 1696 // Vastly most common case. 1697 if (!type->isVariablyModifiedType()) return type; 1698 1699 QualType result; 1700 1701 SplitQualType split = type.getSplitDesugaredType(); 1702 const Type *ty = split.first; 1703 switch (ty->getTypeClass()) { 1704#define TYPE(Class, Base) 1705#define ABSTRACT_TYPE(Class, Base) 1706#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 1707#include "clang/AST/TypeNodes.def" 1708 llvm_unreachable("didn't desugar past all non-canonical types?"); 1709 1710 // These types should never be variably-modified. 1711 case Type::Builtin: 1712 case Type::Complex: 1713 case Type::Vector: 1714 case Type::ExtVector: 1715 case Type::DependentSizedExtVector: 1716 case Type::ObjCObject: 1717 case Type::ObjCInterface: 1718 case Type::ObjCObjectPointer: 1719 case Type::Record: 1720 case Type::Enum: 1721 case Type::UnresolvedUsing: 1722 case Type::TypeOfExpr: 1723 case Type::TypeOf: 1724 case Type::Decltype: 1725 case Type::UnaryTransform: 1726 case Type::DependentName: 1727 case Type::InjectedClassName: 1728 case Type::TemplateSpecialization: 1729 case Type::DependentTemplateSpecialization: 1730 case Type::TemplateTypeParm: 1731 case Type::SubstTemplateTypeParmPack: 1732 case Type::Auto: 1733 case Type::PackExpansion: 1734 llvm_unreachable("type should never be variably-modified"); 1735 1736 // These types can be variably-modified but should never need to 1737 // further decay. 1738 case Type::FunctionNoProto: 1739 case Type::FunctionProto: 1740 case Type::BlockPointer: 1741 case Type::MemberPointer: 1742 return type; 1743 1744 // These types can be variably-modified. All these modifications 1745 // preserve structure except as noted by comments. 1746 // TODO: if we ever care about optimizing VLAs, there are no-op 1747 // optimizations available here. 1748 case Type::Pointer: 1749 result = getPointerType(getVariableArrayDecayedType( 1750 cast<PointerType>(ty)->getPointeeType())); 1751 break; 1752 1753 case Type::LValueReference: { 1754 const LValueReferenceType *lv = cast<LValueReferenceType>(ty); 1755 result = getLValueReferenceType( 1756 getVariableArrayDecayedType(lv->getPointeeType()), 1757 lv->isSpelledAsLValue()); 1758 break; 1759 } 1760 1761 case Type::RValueReference: { 1762 const RValueReferenceType *lv = cast<RValueReferenceType>(ty); 1763 result = getRValueReferenceType( 1764 getVariableArrayDecayedType(lv->getPointeeType())); 1765 break; 1766 } 1767 1768 case Type::Atomic: { 1769 const AtomicType *at = cast<AtomicType>(ty); 1770 result = getAtomicType(getVariableArrayDecayedType(at->getValueType())); 1771 break; 1772 } 1773 1774 case Type::ConstantArray: { 1775 const ConstantArrayType *cat = cast<ConstantArrayType>(ty); 1776 result = getConstantArrayType( 1777 getVariableArrayDecayedType(cat->getElementType()), 1778 cat->getSize(), 1779 cat->getSizeModifier(), 1780 cat->getIndexTypeCVRQualifiers()); 1781 break; 1782 } 1783 1784 case Type::DependentSizedArray: { 1785 const DependentSizedArrayType *dat = cast<DependentSizedArrayType>(ty); 1786 result = getDependentSizedArrayType( 1787 getVariableArrayDecayedType(dat->getElementType()), 1788 dat->getSizeExpr(), 1789 dat->getSizeModifier(), 1790 dat->getIndexTypeCVRQualifiers(), 1791 dat->getBracketsRange()); 1792 break; 1793 } 1794 1795 // Turn incomplete types into [*] types. 1796 case Type::IncompleteArray: { 1797 const IncompleteArrayType *iat = cast<IncompleteArrayType>(ty); 1798 result = getVariableArrayType( 1799 getVariableArrayDecayedType(iat->getElementType()), 1800 /*size*/ 0, 1801 ArrayType::Normal, 1802 iat->getIndexTypeCVRQualifiers(), 1803 SourceRange()); 1804 break; 1805 } 1806 1807 // Turn VLA types into [*] types. 1808 case Type::VariableArray: { 1809 const VariableArrayType *vat = cast<VariableArrayType>(ty); 1810 result = getVariableArrayType( 1811 getVariableArrayDecayedType(vat->getElementType()), 1812 /*size*/ 0, 1813 ArrayType::Star, 1814 vat->getIndexTypeCVRQualifiers(), 1815 vat->getBracketsRange()); 1816 break; 1817 } 1818 } 1819 1820 // Apply the top-level qualifiers from the original. 1821 return getQualifiedType(result, split.second); 1822} 1823 1824/// getVariableArrayType - Returns a non-unique reference to the type for a 1825/// variable array of the specified element type. 1826QualType ASTContext::getVariableArrayType(QualType EltTy, 1827 Expr *NumElts, 1828 ArrayType::ArraySizeModifier ASM, 1829 unsigned IndexTypeQuals, 1830 SourceRange Brackets) const { 1831 // Since we don't unique expressions, it isn't possible to unique VLA's 1832 // that have an expression provided for their size. 1833 QualType Canon; 1834 1835 // Be sure to pull qualifiers off the element type. 1836 if (!EltTy.isCanonical() || EltTy.hasLocalQualifiers()) { 1837 SplitQualType canonSplit = getCanonicalType(EltTy).split(); 1838 Canon = getVariableArrayType(QualType(canonSplit.first, 0), NumElts, ASM, 1839 IndexTypeQuals, Brackets); 1840 Canon = getQualifiedType(Canon, canonSplit.second); 1841 } 1842 1843 VariableArrayType *New = new(*this, TypeAlignment) 1844 VariableArrayType(EltTy, Canon, NumElts, ASM, IndexTypeQuals, Brackets); 1845 1846 VariableArrayTypes.push_back(New); 1847 Types.push_back(New); 1848 return QualType(New, 0); 1849} 1850 1851/// getDependentSizedArrayType - Returns a non-unique reference to 1852/// the type for a dependently-sized array of the specified element 1853/// type. 1854QualType ASTContext::getDependentSizedArrayType(QualType elementType, 1855 Expr *numElements, 1856 ArrayType::ArraySizeModifier ASM, 1857 unsigned elementTypeQuals, 1858 SourceRange brackets) const { 1859 assert((!numElements || numElements->isTypeDependent() || 1860 numElements->isValueDependent()) && 1861 "Size must be type- or value-dependent!"); 1862 1863 // Dependently-sized array types that do not have a specified number 1864 // of elements will have their sizes deduced from a dependent 1865 // initializer. We do no canonicalization here at all, which is okay 1866 // because they can't be used in most locations. 1867 if (!numElements) { 1868 DependentSizedArrayType *newType 1869 = new (*this, TypeAlignment) 1870 DependentSizedArrayType(*this, elementType, QualType(), 1871 numElements, ASM, elementTypeQuals, 1872 brackets); 1873 Types.push_back(newType); 1874 return QualType(newType, 0); 1875 } 1876 1877 // Otherwise, we actually build a new type every time, but we 1878 // also build a canonical type. 1879 1880 SplitQualType canonElementType = getCanonicalType(elementType).split(); 1881 1882 void *insertPos = 0; 1883 llvm::FoldingSetNodeID ID; 1884 DependentSizedArrayType::Profile(ID, *this, 1885 QualType(canonElementType.first, 0), 1886 ASM, elementTypeQuals, numElements); 1887 1888 // Look for an existing type with these properties. 1889 DependentSizedArrayType *canonTy = 1890 DependentSizedArrayTypes.FindNodeOrInsertPos(ID, insertPos); 1891 1892 // If we don't have one, build one. 1893 if (!canonTy) { 1894 canonTy = new (*this, TypeAlignment) 1895 DependentSizedArrayType(*this, QualType(canonElementType.first, 0), 1896 QualType(), numElements, ASM, elementTypeQuals, 1897 brackets); 1898 DependentSizedArrayTypes.InsertNode(canonTy, insertPos); 1899 Types.push_back(canonTy); 1900 } 1901 1902 // Apply qualifiers from the element type to the array. 1903 QualType canon = getQualifiedType(QualType(canonTy,0), 1904 canonElementType.second); 1905 1906 // If we didn't need extra canonicalization for the element type, 1907 // then just use that as our result. 1908 if (QualType(canonElementType.first, 0) == elementType) 1909 return canon; 1910 1911 // Otherwise, we need to build a type which follows the spelling 1912 // of the element type. 1913 DependentSizedArrayType *sugaredType 1914 = new (*this, TypeAlignment) 1915 DependentSizedArrayType(*this, elementType, canon, numElements, 1916 ASM, elementTypeQuals, brackets); 1917 Types.push_back(sugaredType); 1918 return QualType(sugaredType, 0); 1919} 1920 1921QualType ASTContext::getIncompleteArrayType(QualType elementType, 1922 ArrayType::ArraySizeModifier ASM, 1923 unsigned elementTypeQuals) const { 1924 llvm::FoldingSetNodeID ID; 1925 IncompleteArrayType::Profile(ID, elementType, ASM, elementTypeQuals); 1926 1927 void *insertPos = 0; 1928 if (IncompleteArrayType *iat = 1929 IncompleteArrayTypes.FindNodeOrInsertPos(ID, insertPos)) 1930 return QualType(iat, 0); 1931 1932 // If the element type isn't canonical, this won't be a canonical type 1933 // either, so fill in the canonical type field. We also have to pull 1934 // qualifiers off the element type. 1935 QualType canon; 1936 1937 if (!elementType.isCanonical() || elementType.hasLocalQualifiers()) { 1938 SplitQualType canonSplit = getCanonicalType(elementType).split(); 1939 canon = getIncompleteArrayType(QualType(canonSplit.first, 0), 1940 ASM, elementTypeQuals); 1941 canon = getQualifiedType(canon, canonSplit.second); 1942 1943 // Get the new insert position for the node we care about. 1944 IncompleteArrayType *existing = 1945 IncompleteArrayTypes.FindNodeOrInsertPos(ID, insertPos); 1946 assert(!existing && "Shouldn't be in the map!"); (void) existing; 1947 } 1948 1949 IncompleteArrayType *newType = new (*this, TypeAlignment) 1950 IncompleteArrayType(elementType, canon, ASM, elementTypeQuals); 1951 1952 IncompleteArrayTypes.InsertNode(newType, insertPos); 1953 Types.push_back(newType); 1954 return QualType(newType, 0); 1955} 1956 1957/// getVectorType - Return the unique reference to a vector type of 1958/// the specified element type and size. VectorType must be a built-in type. 1959QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts, 1960 VectorType::VectorKind VecKind) const { 1961 assert(vecType->isBuiltinType()); 1962 1963 // Check if we've already instantiated a vector of this type. 1964 llvm::FoldingSetNodeID ID; 1965 VectorType::Profile(ID, vecType, NumElts, Type::Vector, VecKind); 1966 1967 void *InsertPos = 0; 1968 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1969 return QualType(VTP, 0); 1970 1971 // If the element type isn't canonical, this won't be a canonical type either, 1972 // so fill in the canonical type field. 1973 QualType Canonical; 1974 if (!vecType.isCanonical()) { 1975 Canonical = getVectorType(getCanonicalType(vecType), NumElts, VecKind); 1976 1977 // Get the new insert position for the node we care about. 1978 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1979 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1980 } 1981 VectorType *New = new (*this, TypeAlignment) 1982 VectorType(vecType, NumElts, Canonical, VecKind); 1983 VectorTypes.InsertNode(New, InsertPos); 1984 Types.push_back(New); 1985 return QualType(New, 0); 1986} 1987 1988/// getExtVectorType - Return the unique reference to an extended vector type of 1989/// the specified element type and size. VectorType must be a built-in type. 1990QualType 1991ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) const { 1992 assert(vecType->isBuiltinType() || vecType->isDependentType()); 1993 1994 // Check if we've already instantiated a vector of this type. 1995 llvm::FoldingSetNodeID ID; 1996 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector, 1997 VectorType::GenericVector); 1998 void *InsertPos = 0; 1999 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 2000 return QualType(VTP, 0); 2001 2002 // If the element type isn't canonical, this won't be a canonical type either, 2003 // so fill in the canonical type field. 2004 QualType Canonical; 2005 if (!vecType.isCanonical()) { 2006 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts); 2007 2008 // Get the new insert position for the node we care about. 2009 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 2010 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 2011 } 2012 ExtVectorType *New = new (*this, TypeAlignment) 2013 ExtVectorType(vecType, NumElts, Canonical); 2014 VectorTypes.InsertNode(New, InsertPos); 2015 Types.push_back(New); 2016 return QualType(New, 0); 2017} 2018 2019QualType 2020ASTContext::getDependentSizedExtVectorType(QualType vecType, 2021 Expr *SizeExpr, 2022 SourceLocation AttrLoc) const { 2023 llvm::FoldingSetNodeID ID; 2024 DependentSizedExtVectorType::Profile(ID, *this, getCanonicalType(vecType), 2025 SizeExpr); 2026 2027 void *InsertPos = 0; 2028 DependentSizedExtVectorType *Canon 2029 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 2030 DependentSizedExtVectorType *New; 2031 if (Canon) { 2032 // We already have a canonical version of this array type; use it as 2033 // the canonical type for a newly-built type. 2034 New = new (*this, TypeAlignment) 2035 DependentSizedExtVectorType(*this, vecType, QualType(Canon, 0), 2036 SizeExpr, AttrLoc); 2037 } else { 2038 QualType CanonVecTy = getCanonicalType(vecType); 2039 if (CanonVecTy == vecType) { 2040 New = new (*this, TypeAlignment) 2041 DependentSizedExtVectorType(*this, vecType, QualType(), SizeExpr, 2042 AttrLoc); 2043 2044 DependentSizedExtVectorType *CanonCheck 2045 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 2046 assert(!CanonCheck && "Dependent-sized ext_vector canonical type broken"); 2047 (void)CanonCheck; 2048 DependentSizedExtVectorTypes.InsertNode(New, InsertPos); 2049 } else { 2050 QualType Canon = getDependentSizedExtVectorType(CanonVecTy, SizeExpr, 2051 SourceLocation()); 2052 New = new (*this, TypeAlignment) 2053 DependentSizedExtVectorType(*this, vecType, Canon, SizeExpr, AttrLoc); 2054 } 2055 } 2056 2057 Types.push_back(New); 2058 return QualType(New, 0); 2059} 2060 2061/// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 2062/// 2063QualType 2064ASTContext::getFunctionNoProtoType(QualType ResultTy, 2065 const FunctionType::ExtInfo &Info) const { 2066 const CallingConv DefaultCC = Info.getCC(); 2067 const CallingConv CallConv = (LangOpts.MRTD && DefaultCC == CC_Default) ? 2068 CC_X86StdCall : DefaultCC; 2069 // Unique functions, to guarantee there is only one function of a particular 2070 // structure. 2071 llvm::FoldingSetNodeID ID; 2072 FunctionNoProtoType::Profile(ID, ResultTy, Info); 2073 2074 void *InsertPos = 0; 2075 if (FunctionNoProtoType *FT = 2076 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 2077 return QualType(FT, 0); 2078 2079 QualType Canonical; 2080 if (!ResultTy.isCanonical() || 2081 getCanonicalCallConv(CallConv) != CallConv) { 2082 Canonical = 2083 getFunctionNoProtoType(getCanonicalType(ResultTy), 2084 Info.withCallingConv(getCanonicalCallConv(CallConv))); 2085 2086 // Get the new insert position for the node we care about. 2087 FunctionNoProtoType *NewIP = 2088 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 2089 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 2090 } 2091 2092 FunctionProtoType::ExtInfo newInfo = Info.withCallingConv(CallConv); 2093 FunctionNoProtoType *New = new (*this, TypeAlignment) 2094 FunctionNoProtoType(ResultTy, Canonical, newInfo); 2095 Types.push_back(New); 2096 FunctionNoProtoTypes.InsertNode(New, InsertPos); 2097 return QualType(New, 0); 2098} 2099 2100/// getFunctionType - Return a normal function type with a typed argument 2101/// list. isVariadic indicates whether the argument list includes '...'. 2102QualType 2103ASTContext::getFunctionType(QualType ResultTy, 2104 const QualType *ArgArray, unsigned NumArgs, 2105 const FunctionProtoType::ExtProtoInfo &EPI) const { 2106 // Unique functions, to guarantee there is only one function of a particular 2107 // structure. 2108 llvm::FoldingSetNodeID ID; 2109 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, EPI, *this); 2110 2111 void *InsertPos = 0; 2112 if (FunctionProtoType *FTP = 2113 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 2114 return QualType(FTP, 0); 2115 2116 // Determine whether the type being created is already canonical or not. 2117 bool isCanonical= EPI.ExceptionSpecType == EST_None && ResultTy.isCanonical(); 2118 for (unsigned i = 0; i != NumArgs && isCanonical; ++i) 2119 if (!ArgArray[i].isCanonicalAsParam()) 2120 isCanonical = false; 2121 2122 const CallingConv DefaultCC = EPI.ExtInfo.getCC(); 2123 const CallingConv CallConv = (LangOpts.MRTD && DefaultCC == CC_Default) ? 2124 CC_X86StdCall : DefaultCC; 2125 2126 // If this type isn't canonical, get the canonical version of it. 2127 // The exception spec is not part of the canonical type. 2128 QualType Canonical; 2129 if (!isCanonical || getCanonicalCallConv(CallConv) != CallConv) { 2130 SmallVector<QualType, 16> CanonicalArgs; 2131 CanonicalArgs.reserve(NumArgs); 2132 for (unsigned i = 0; i != NumArgs; ++i) 2133 CanonicalArgs.push_back(getCanonicalParamType(ArgArray[i])); 2134 2135 FunctionProtoType::ExtProtoInfo CanonicalEPI = EPI; 2136 CanonicalEPI.ExceptionSpecType = EST_None; 2137 CanonicalEPI.NumExceptions = 0; 2138 CanonicalEPI.ExtInfo 2139 = CanonicalEPI.ExtInfo.withCallingConv(getCanonicalCallConv(CallConv)); 2140 2141 Canonical = getFunctionType(getCanonicalType(ResultTy), 2142 CanonicalArgs.data(), NumArgs, 2143 CanonicalEPI); 2144 2145 // Get the new insert position for the node we care about. 2146 FunctionProtoType *NewIP = 2147 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 2148 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 2149 } 2150 2151 // FunctionProtoType objects are allocated with extra bytes after 2152 // them for three variable size arrays at the end: 2153 // - parameter types 2154 // - exception types 2155 // - consumed-arguments flags 2156 // Instead of the exception types, there could be a noexcept 2157 // expression. 2158 size_t Size = sizeof(FunctionProtoType) + 2159 NumArgs * sizeof(QualType); 2160 if (EPI.ExceptionSpecType == EST_Dynamic) 2161 Size += EPI.NumExceptions * sizeof(QualType); 2162 else if (EPI.ExceptionSpecType == EST_ComputedNoexcept) { 2163 Size += sizeof(Expr*); 2164 } 2165 if (EPI.ConsumedArguments) 2166 Size += NumArgs * sizeof(bool); 2167 2168 FunctionProtoType *FTP = (FunctionProtoType*) Allocate(Size, TypeAlignment); 2169 FunctionProtoType::ExtProtoInfo newEPI = EPI; 2170 newEPI.ExtInfo = EPI.ExtInfo.withCallingConv(CallConv); 2171 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, Canonical, newEPI); 2172 Types.push_back(FTP); 2173 FunctionProtoTypes.InsertNode(FTP, InsertPos); 2174 return QualType(FTP, 0); 2175} 2176 2177#ifndef NDEBUG 2178static bool NeedsInjectedClassNameType(const RecordDecl *D) { 2179 if (!isa<CXXRecordDecl>(D)) return false; 2180 const CXXRecordDecl *RD = cast<CXXRecordDecl>(D); 2181 if (isa<ClassTemplatePartialSpecializationDecl>(RD)) 2182 return true; 2183 if (RD->getDescribedClassTemplate() && 2184 !isa<ClassTemplateSpecializationDecl>(RD)) 2185 return true; 2186 return false; 2187} 2188#endif 2189 2190/// getInjectedClassNameType - Return the unique reference to the 2191/// injected class name type for the specified templated declaration. 2192QualType ASTContext::getInjectedClassNameType(CXXRecordDecl *Decl, 2193 QualType TST) const { 2194 assert(NeedsInjectedClassNameType(Decl)); 2195 if (Decl->TypeForDecl) { 2196 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 2197 } else if (CXXRecordDecl *PrevDecl = Decl->getPreviousDecl()) { 2198 assert(PrevDecl->TypeForDecl && "previous declaration has no type"); 2199 Decl->TypeForDecl = PrevDecl->TypeForDecl; 2200 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 2201 } else { 2202 Type *newType = 2203 new (*this, TypeAlignment) InjectedClassNameType(Decl, TST); 2204 Decl->TypeForDecl = newType; 2205 Types.push_back(newType); 2206 } 2207 return QualType(Decl->TypeForDecl, 0); 2208} 2209 2210/// getTypeDeclType - Return the unique reference to the type for the 2211/// specified type declaration. 2212QualType ASTContext::getTypeDeclTypeSlow(const TypeDecl *Decl) const { 2213 assert(Decl && "Passed null for Decl param"); 2214 assert(!Decl->TypeForDecl && "TypeForDecl present in slow case"); 2215 2216 if (const TypedefNameDecl *Typedef = dyn_cast<TypedefNameDecl>(Decl)) 2217 return getTypedefType(Typedef); 2218 2219 assert(!isa<TemplateTypeParmDecl>(Decl) && 2220 "Template type parameter types are always available."); 2221 2222 if (const RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) { 2223 assert(!Record->getPreviousDecl() && 2224 "struct/union has previous declaration"); 2225 assert(!NeedsInjectedClassNameType(Record)); 2226 return getRecordType(Record); 2227 } else if (const EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) { 2228 assert(!Enum->getPreviousDecl() && 2229 "enum has previous declaration"); 2230 return getEnumType(Enum); 2231 } else if (const UnresolvedUsingTypenameDecl *Using = 2232 dyn_cast<UnresolvedUsingTypenameDecl>(Decl)) { 2233 Type *newType = new (*this, TypeAlignment) UnresolvedUsingType(Using); 2234 Decl->TypeForDecl = newType; 2235 Types.push_back(newType); 2236 } else 2237 llvm_unreachable("TypeDecl without a type?"); 2238 2239 return QualType(Decl->TypeForDecl, 0); 2240} 2241 2242/// getTypedefType - Return the unique reference to the type for the 2243/// specified typedef name decl. 2244QualType 2245ASTContext::getTypedefType(const TypedefNameDecl *Decl, 2246 QualType Canonical) const { 2247 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2248 2249 if (Canonical.isNull()) 2250 Canonical = getCanonicalType(Decl->getUnderlyingType()); 2251 TypedefType *newType = new(*this, TypeAlignment) 2252 TypedefType(Type::Typedef, Decl, Canonical); 2253 Decl->TypeForDecl = newType; 2254 Types.push_back(newType); 2255 return QualType(newType, 0); 2256} 2257 2258QualType ASTContext::getRecordType(const RecordDecl *Decl) const { 2259 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2260 2261 if (const RecordDecl *PrevDecl = Decl->getPreviousDecl()) 2262 if (PrevDecl->TypeForDecl) 2263 return QualType(Decl->TypeForDecl = PrevDecl->TypeForDecl, 0); 2264 2265 RecordType *newType = new (*this, TypeAlignment) RecordType(Decl); 2266 Decl->TypeForDecl = newType; 2267 Types.push_back(newType); 2268 return QualType(newType, 0); 2269} 2270 2271QualType ASTContext::getEnumType(const EnumDecl *Decl) const { 2272 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2273 2274 if (const EnumDecl *PrevDecl = Decl->getPreviousDecl()) 2275 if (PrevDecl->TypeForDecl) 2276 return QualType(Decl->TypeForDecl = PrevDecl->TypeForDecl, 0); 2277 2278 EnumType *newType = new (*this, TypeAlignment) EnumType(Decl); 2279 Decl->TypeForDecl = newType; 2280 Types.push_back(newType); 2281 return QualType(newType, 0); 2282} 2283 2284QualType ASTContext::getAttributedType(AttributedType::Kind attrKind, 2285 QualType modifiedType, 2286 QualType equivalentType) { 2287 llvm::FoldingSetNodeID id; 2288 AttributedType::Profile(id, attrKind, modifiedType, equivalentType); 2289 2290 void *insertPos = 0; 2291 AttributedType *type = AttributedTypes.FindNodeOrInsertPos(id, insertPos); 2292 if (type) return QualType(type, 0); 2293 2294 QualType canon = getCanonicalType(equivalentType); 2295 type = new (*this, TypeAlignment) 2296 AttributedType(canon, attrKind, modifiedType, equivalentType); 2297 2298 Types.push_back(type); 2299 AttributedTypes.InsertNode(type, insertPos); 2300 2301 return QualType(type, 0); 2302} 2303 2304 2305/// \brief Retrieve a substitution-result type. 2306QualType 2307ASTContext::getSubstTemplateTypeParmType(const TemplateTypeParmType *Parm, 2308 QualType Replacement) const { 2309 assert(Replacement.isCanonical() 2310 && "replacement types must always be canonical"); 2311 2312 llvm::FoldingSetNodeID ID; 2313 SubstTemplateTypeParmType::Profile(ID, Parm, Replacement); 2314 void *InsertPos = 0; 2315 SubstTemplateTypeParmType *SubstParm 2316 = SubstTemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2317 2318 if (!SubstParm) { 2319 SubstParm = new (*this, TypeAlignment) 2320 SubstTemplateTypeParmType(Parm, Replacement); 2321 Types.push_back(SubstParm); 2322 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 2323 } 2324 2325 return QualType(SubstParm, 0); 2326} 2327 2328/// \brief Retrieve a 2329QualType ASTContext::getSubstTemplateTypeParmPackType( 2330 const TemplateTypeParmType *Parm, 2331 const TemplateArgument &ArgPack) { 2332#ifndef NDEBUG 2333 for (TemplateArgument::pack_iterator P = ArgPack.pack_begin(), 2334 PEnd = ArgPack.pack_end(); 2335 P != PEnd; ++P) { 2336 assert(P->getKind() == TemplateArgument::Type &&"Pack contains a non-type"); 2337 assert(P->getAsType().isCanonical() && "Pack contains non-canonical type"); 2338 } 2339#endif 2340 2341 llvm::FoldingSetNodeID ID; 2342 SubstTemplateTypeParmPackType::Profile(ID, Parm, ArgPack); 2343 void *InsertPos = 0; 2344 if (SubstTemplateTypeParmPackType *SubstParm 2345 = SubstTemplateTypeParmPackTypes.FindNodeOrInsertPos(ID, InsertPos)) 2346 return QualType(SubstParm, 0); 2347 2348 QualType Canon; 2349 if (!Parm->isCanonicalUnqualified()) { 2350 Canon = getCanonicalType(QualType(Parm, 0)); 2351 Canon = getSubstTemplateTypeParmPackType(cast<TemplateTypeParmType>(Canon), 2352 ArgPack); 2353 SubstTemplateTypeParmPackTypes.FindNodeOrInsertPos(ID, InsertPos); 2354 } 2355 2356 SubstTemplateTypeParmPackType *SubstParm 2357 = new (*this, TypeAlignment) SubstTemplateTypeParmPackType(Parm, Canon, 2358 ArgPack); 2359 Types.push_back(SubstParm); 2360 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 2361 return QualType(SubstParm, 0); 2362} 2363 2364/// \brief Retrieve the template type parameter type for a template 2365/// parameter or parameter pack with the given depth, index, and (optionally) 2366/// name. 2367QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index, 2368 bool ParameterPack, 2369 TemplateTypeParmDecl *TTPDecl) const { 2370 llvm::FoldingSetNodeID ID; 2371 TemplateTypeParmType::Profile(ID, Depth, Index, ParameterPack, TTPDecl); 2372 void *InsertPos = 0; 2373 TemplateTypeParmType *TypeParm 2374 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2375 2376 if (TypeParm) 2377 return QualType(TypeParm, 0); 2378 2379 if (TTPDecl) { 2380 QualType Canon = getTemplateTypeParmType(Depth, Index, ParameterPack); 2381 TypeParm = new (*this, TypeAlignment) TemplateTypeParmType(TTPDecl, Canon); 2382 2383 TemplateTypeParmType *TypeCheck 2384 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2385 assert(!TypeCheck && "Template type parameter canonical type broken"); 2386 (void)TypeCheck; 2387 } else 2388 TypeParm = new (*this, TypeAlignment) 2389 TemplateTypeParmType(Depth, Index, ParameterPack); 2390 2391 Types.push_back(TypeParm); 2392 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos); 2393 2394 return QualType(TypeParm, 0); 2395} 2396 2397TypeSourceInfo * 2398ASTContext::getTemplateSpecializationTypeInfo(TemplateName Name, 2399 SourceLocation NameLoc, 2400 const TemplateArgumentListInfo &Args, 2401 QualType Underlying) const { 2402 assert(!Name.getAsDependentTemplateName() && 2403 "No dependent template names here!"); 2404 QualType TST = getTemplateSpecializationType(Name, Args, Underlying); 2405 2406 TypeSourceInfo *DI = CreateTypeSourceInfo(TST); 2407 TemplateSpecializationTypeLoc TL 2408 = cast<TemplateSpecializationTypeLoc>(DI->getTypeLoc()); 2409 TL.setTemplateNameLoc(NameLoc); 2410 TL.setLAngleLoc(Args.getLAngleLoc()); 2411 TL.setRAngleLoc(Args.getRAngleLoc()); 2412 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 2413 TL.setArgLocInfo(i, Args[i].getLocInfo()); 2414 return DI; 2415} 2416 2417QualType 2418ASTContext::getTemplateSpecializationType(TemplateName Template, 2419 const TemplateArgumentListInfo &Args, 2420 QualType Underlying) const { 2421 assert(!Template.getAsDependentTemplateName() && 2422 "No dependent template names here!"); 2423 2424 unsigned NumArgs = Args.size(); 2425 2426 SmallVector<TemplateArgument, 4> ArgVec; 2427 ArgVec.reserve(NumArgs); 2428 for (unsigned i = 0; i != NumArgs; ++i) 2429 ArgVec.push_back(Args[i].getArgument()); 2430 2431 return getTemplateSpecializationType(Template, ArgVec.data(), NumArgs, 2432 Underlying); 2433} 2434 2435QualType 2436ASTContext::getTemplateSpecializationType(TemplateName Template, 2437 const TemplateArgument *Args, 2438 unsigned NumArgs, 2439 QualType Underlying) const { 2440 assert(!Template.getAsDependentTemplateName() && 2441 "No dependent template names here!"); 2442 // Look through qualified template names. 2443 if (QualifiedTemplateName *QTN = Template.getAsQualifiedTemplateName()) 2444 Template = TemplateName(QTN->getTemplateDecl()); 2445 2446 bool isTypeAlias = 2447 Template.getAsTemplateDecl() && 2448 isa<TypeAliasTemplateDecl>(Template.getAsTemplateDecl()); 2449 2450 QualType CanonType; 2451 if (!Underlying.isNull()) 2452 CanonType = getCanonicalType(Underlying); 2453 else { 2454 assert(!isTypeAlias && 2455 "Underlying type for template alias must be computed by caller"); 2456 CanonType = getCanonicalTemplateSpecializationType(Template, Args, 2457 NumArgs); 2458 } 2459 2460 // Allocate the (non-canonical) template specialization type, but don't 2461 // try to unique it: these types typically have location information that 2462 // we don't unique and don't want to lose. 2463 void *Mem = Allocate(sizeof(TemplateSpecializationType) + 2464 sizeof(TemplateArgument) * NumArgs + 2465 (isTypeAlias ? sizeof(QualType) : 0), 2466 TypeAlignment); 2467 TemplateSpecializationType *Spec 2468 = new (Mem) TemplateSpecializationType(Template, 2469 Args, NumArgs, 2470 CanonType, 2471 isTypeAlias ? Underlying : QualType()); 2472 2473 Types.push_back(Spec); 2474 return QualType(Spec, 0); 2475} 2476 2477QualType 2478ASTContext::getCanonicalTemplateSpecializationType(TemplateName Template, 2479 const TemplateArgument *Args, 2480 unsigned NumArgs) const { 2481 assert(!Template.getAsDependentTemplateName() && 2482 "No dependent template names here!"); 2483 assert((!Template.getAsTemplateDecl() || 2484 !isa<TypeAliasTemplateDecl>(Template.getAsTemplateDecl())) && 2485 "Underlying type for template alias must be computed by caller"); 2486 2487 // Look through qualified template names. 2488 if (QualifiedTemplateName *QTN = Template.getAsQualifiedTemplateName()) 2489 Template = TemplateName(QTN->getTemplateDecl()); 2490 2491 // Build the canonical template specialization type. 2492 TemplateName CanonTemplate = getCanonicalTemplateName(Template); 2493 SmallVector<TemplateArgument, 4> CanonArgs; 2494 CanonArgs.reserve(NumArgs); 2495 for (unsigned I = 0; I != NumArgs; ++I) 2496 CanonArgs.push_back(getCanonicalTemplateArgument(Args[I])); 2497 2498 // Determine whether this canonical template specialization type already 2499 // exists. 2500 llvm::FoldingSetNodeID ID; 2501 TemplateSpecializationType::Profile(ID, CanonTemplate, 2502 CanonArgs.data(), NumArgs, *this); 2503 2504 void *InsertPos = 0; 2505 TemplateSpecializationType *Spec 2506 = TemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2507 2508 if (!Spec) { 2509 // Allocate a new canonical template specialization type. 2510 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 2511 sizeof(TemplateArgument) * NumArgs), 2512 TypeAlignment); 2513 Spec = new (Mem) TemplateSpecializationType(CanonTemplate, 2514 CanonArgs.data(), NumArgs, 2515 QualType(), QualType()); 2516 Types.push_back(Spec); 2517 TemplateSpecializationTypes.InsertNode(Spec, InsertPos); 2518 } 2519 2520 assert(Spec->isDependentType() && 2521 "Non-dependent template-id type must have a canonical type"); 2522 return QualType(Spec, 0); 2523} 2524 2525QualType 2526ASTContext::getElaboratedType(ElaboratedTypeKeyword Keyword, 2527 NestedNameSpecifier *NNS, 2528 QualType NamedType) const { 2529 llvm::FoldingSetNodeID ID; 2530 ElaboratedType::Profile(ID, Keyword, NNS, NamedType); 2531 2532 void *InsertPos = 0; 2533 ElaboratedType *T = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2534 if (T) 2535 return QualType(T, 0); 2536 2537 QualType Canon = NamedType; 2538 if (!Canon.isCanonical()) { 2539 Canon = getCanonicalType(NamedType); 2540 ElaboratedType *CheckT = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2541 assert(!CheckT && "Elaborated canonical type broken"); 2542 (void)CheckT; 2543 } 2544 2545 T = new (*this) ElaboratedType(Keyword, NNS, NamedType, Canon); 2546 Types.push_back(T); 2547 ElaboratedTypes.InsertNode(T, InsertPos); 2548 return QualType(T, 0); 2549} 2550 2551QualType 2552ASTContext::getParenType(QualType InnerType) const { 2553 llvm::FoldingSetNodeID ID; 2554 ParenType::Profile(ID, InnerType); 2555 2556 void *InsertPos = 0; 2557 ParenType *T = ParenTypes.FindNodeOrInsertPos(ID, InsertPos); 2558 if (T) 2559 return QualType(T, 0); 2560 2561 QualType Canon = InnerType; 2562 if (!Canon.isCanonical()) { 2563 Canon = getCanonicalType(InnerType); 2564 ParenType *CheckT = ParenTypes.FindNodeOrInsertPos(ID, InsertPos); 2565 assert(!CheckT && "Paren canonical type broken"); 2566 (void)CheckT; 2567 } 2568 2569 T = new (*this) ParenType(InnerType, Canon); 2570 Types.push_back(T); 2571 ParenTypes.InsertNode(T, InsertPos); 2572 return QualType(T, 0); 2573} 2574 2575QualType ASTContext::getDependentNameType(ElaboratedTypeKeyword Keyword, 2576 NestedNameSpecifier *NNS, 2577 const IdentifierInfo *Name, 2578 QualType Canon) const { 2579 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 2580 2581 if (Canon.isNull()) { 2582 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2583 ElaboratedTypeKeyword CanonKeyword = Keyword; 2584 if (Keyword == ETK_None) 2585 CanonKeyword = ETK_Typename; 2586 2587 if (CanonNNS != NNS || CanonKeyword != Keyword) 2588 Canon = getDependentNameType(CanonKeyword, CanonNNS, Name); 2589 } 2590 2591 llvm::FoldingSetNodeID ID; 2592 DependentNameType::Profile(ID, Keyword, NNS, Name); 2593 2594 void *InsertPos = 0; 2595 DependentNameType *T 2596 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 2597 if (T) 2598 return QualType(T, 0); 2599 2600 T = new (*this) DependentNameType(Keyword, NNS, Name, Canon); 2601 Types.push_back(T); 2602 DependentNameTypes.InsertNode(T, InsertPos); 2603 return QualType(T, 0); 2604} 2605 2606QualType 2607ASTContext::getDependentTemplateSpecializationType( 2608 ElaboratedTypeKeyword Keyword, 2609 NestedNameSpecifier *NNS, 2610 const IdentifierInfo *Name, 2611 const TemplateArgumentListInfo &Args) const { 2612 // TODO: avoid this copy 2613 SmallVector<TemplateArgument, 16> ArgCopy; 2614 for (unsigned I = 0, E = Args.size(); I != E; ++I) 2615 ArgCopy.push_back(Args[I].getArgument()); 2616 return getDependentTemplateSpecializationType(Keyword, NNS, Name, 2617 ArgCopy.size(), 2618 ArgCopy.data()); 2619} 2620 2621QualType 2622ASTContext::getDependentTemplateSpecializationType( 2623 ElaboratedTypeKeyword Keyword, 2624 NestedNameSpecifier *NNS, 2625 const IdentifierInfo *Name, 2626 unsigned NumArgs, 2627 const TemplateArgument *Args) const { 2628 assert((!NNS || NNS->isDependent()) && 2629 "nested-name-specifier must be dependent"); 2630 2631 llvm::FoldingSetNodeID ID; 2632 DependentTemplateSpecializationType::Profile(ID, *this, Keyword, NNS, 2633 Name, NumArgs, Args); 2634 2635 void *InsertPos = 0; 2636 DependentTemplateSpecializationType *T 2637 = DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2638 if (T) 2639 return QualType(T, 0); 2640 2641 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2642 2643 ElaboratedTypeKeyword CanonKeyword = Keyword; 2644 if (Keyword == ETK_None) CanonKeyword = ETK_Typename; 2645 2646 bool AnyNonCanonArgs = false; 2647 SmallVector<TemplateArgument, 16> CanonArgs(NumArgs); 2648 for (unsigned I = 0; I != NumArgs; ++I) { 2649 CanonArgs[I] = getCanonicalTemplateArgument(Args[I]); 2650 if (!CanonArgs[I].structurallyEquals(Args[I])) 2651 AnyNonCanonArgs = true; 2652 } 2653 2654 QualType Canon; 2655 if (AnyNonCanonArgs || CanonNNS != NNS || CanonKeyword != Keyword) { 2656 Canon = getDependentTemplateSpecializationType(CanonKeyword, CanonNNS, 2657 Name, NumArgs, 2658 CanonArgs.data()); 2659 2660 // Find the insert position again. 2661 DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2662 } 2663 2664 void *Mem = Allocate((sizeof(DependentTemplateSpecializationType) + 2665 sizeof(TemplateArgument) * NumArgs), 2666 TypeAlignment); 2667 T = new (Mem) DependentTemplateSpecializationType(Keyword, NNS, 2668 Name, NumArgs, Args, Canon); 2669 Types.push_back(T); 2670 DependentTemplateSpecializationTypes.InsertNode(T, InsertPos); 2671 return QualType(T, 0); 2672} 2673 2674QualType ASTContext::getPackExpansionType(QualType Pattern, 2675 llvm::Optional<unsigned> NumExpansions) { 2676 llvm::FoldingSetNodeID ID; 2677 PackExpansionType::Profile(ID, Pattern, NumExpansions); 2678 2679 assert(Pattern->containsUnexpandedParameterPack() && 2680 "Pack expansions must expand one or more parameter packs"); 2681 void *InsertPos = 0; 2682 PackExpansionType *T 2683 = PackExpansionTypes.FindNodeOrInsertPos(ID, InsertPos); 2684 if (T) 2685 return QualType(T, 0); 2686 2687 QualType Canon; 2688 if (!Pattern.isCanonical()) { 2689 Canon = getPackExpansionType(getCanonicalType(Pattern), NumExpansions); 2690 2691 // Find the insert position again. 2692 PackExpansionTypes.FindNodeOrInsertPos(ID, InsertPos); 2693 } 2694 2695 T = new (*this) PackExpansionType(Pattern, Canon, NumExpansions); 2696 Types.push_back(T); 2697 PackExpansionTypes.InsertNode(T, InsertPos); 2698 return QualType(T, 0); 2699} 2700 2701/// CmpProtocolNames - Comparison predicate for sorting protocols 2702/// alphabetically. 2703static bool CmpProtocolNames(const ObjCProtocolDecl *LHS, 2704 const ObjCProtocolDecl *RHS) { 2705 return LHS->getDeclName() < RHS->getDeclName(); 2706} 2707 2708static bool areSortedAndUniqued(ObjCProtocolDecl * const *Protocols, 2709 unsigned NumProtocols) { 2710 if (NumProtocols == 0) return true; 2711 2712 if (Protocols[0]->getCanonicalDecl() != Protocols[0]) 2713 return false; 2714 2715 for (unsigned i = 1; i != NumProtocols; ++i) 2716 if (!CmpProtocolNames(Protocols[i-1], Protocols[i]) || 2717 Protocols[i]->getCanonicalDecl() != Protocols[i]) 2718 return false; 2719 return true; 2720} 2721 2722static void SortAndUniqueProtocols(ObjCProtocolDecl **Protocols, 2723 unsigned &NumProtocols) { 2724 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols; 2725 2726 // Sort protocols, keyed by name. 2727 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames); 2728 2729 // Canonicalize. 2730 for (unsigned I = 0, N = NumProtocols; I != N; ++I) 2731 Protocols[I] = Protocols[I]->getCanonicalDecl(); 2732 2733 // Remove duplicates. 2734 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd); 2735 NumProtocols = ProtocolsEnd-Protocols; 2736} 2737 2738QualType ASTContext::getObjCObjectType(QualType BaseType, 2739 ObjCProtocolDecl * const *Protocols, 2740 unsigned NumProtocols) const { 2741 // If the base type is an interface and there aren't any protocols 2742 // to add, then the interface type will do just fine. 2743 if (!NumProtocols && isa<ObjCInterfaceType>(BaseType)) 2744 return BaseType; 2745 2746 // Look in the folding set for an existing type. 2747 llvm::FoldingSetNodeID ID; 2748 ObjCObjectTypeImpl::Profile(ID, BaseType, Protocols, NumProtocols); 2749 void *InsertPos = 0; 2750 if (ObjCObjectType *QT = ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos)) 2751 return QualType(QT, 0); 2752 2753 // Build the canonical type, which has the canonical base type and 2754 // a sorted-and-uniqued list of protocols. 2755 QualType Canonical; 2756 bool ProtocolsSorted = areSortedAndUniqued(Protocols, NumProtocols); 2757 if (!ProtocolsSorted || !BaseType.isCanonical()) { 2758 if (!ProtocolsSorted) { 2759 SmallVector<ObjCProtocolDecl*, 8> Sorted(Protocols, 2760 Protocols + NumProtocols); 2761 unsigned UniqueCount = NumProtocols; 2762 2763 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2764 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2765 &Sorted[0], UniqueCount); 2766 } else { 2767 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2768 Protocols, NumProtocols); 2769 } 2770 2771 // Regenerate InsertPos. 2772 ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos); 2773 } 2774 2775 unsigned Size = sizeof(ObjCObjectTypeImpl); 2776 Size += NumProtocols * sizeof(ObjCProtocolDecl *); 2777 void *Mem = Allocate(Size, TypeAlignment); 2778 ObjCObjectTypeImpl *T = 2779 new (Mem) ObjCObjectTypeImpl(Canonical, BaseType, Protocols, NumProtocols); 2780 2781 Types.push_back(T); 2782 ObjCObjectTypes.InsertNode(T, InsertPos); 2783 return QualType(T, 0); 2784} 2785 2786/// getObjCObjectPointerType - Return a ObjCObjectPointerType type for 2787/// the given object type. 2788QualType ASTContext::getObjCObjectPointerType(QualType ObjectT) const { 2789 llvm::FoldingSetNodeID ID; 2790 ObjCObjectPointerType::Profile(ID, ObjectT); 2791 2792 void *InsertPos = 0; 2793 if (ObjCObjectPointerType *QT = 2794 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 2795 return QualType(QT, 0); 2796 2797 // Find the canonical object type. 2798 QualType Canonical; 2799 if (!ObjectT.isCanonical()) { 2800 Canonical = getObjCObjectPointerType(getCanonicalType(ObjectT)); 2801 2802 // Regenerate InsertPos. 2803 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 2804 } 2805 2806 // No match. 2807 void *Mem = Allocate(sizeof(ObjCObjectPointerType), TypeAlignment); 2808 ObjCObjectPointerType *QType = 2809 new (Mem) ObjCObjectPointerType(Canonical, ObjectT); 2810 2811 Types.push_back(QType); 2812 ObjCObjectPointerTypes.InsertNode(QType, InsertPos); 2813 return QualType(QType, 0); 2814} 2815 2816/// getObjCInterfaceType - Return the unique reference to the type for the 2817/// specified ObjC interface decl. The list of protocols is optional. 2818QualType ASTContext::getObjCInterfaceType(const ObjCInterfaceDecl *Decl, 2819 ObjCInterfaceDecl *PrevDecl) const { 2820 if (Decl->TypeForDecl) 2821 return QualType(Decl->TypeForDecl, 0); 2822 2823 if (PrevDecl) { 2824 assert(PrevDecl->TypeForDecl && "previous decl has no TypeForDecl"); 2825 Decl->TypeForDecl = PrevDecl->TypeForDecl; 2826 return QualType(PrevDecl->TypeForDecl, 0); 2827 } 2828 2829 // Prefer the definition, if there is one. 2830 if (const ObjCInterfaceDecl *Def = Decl->getDefinition()) 2831 Decl = Def; 2832 2833 void *Mem = Allocate(sizeof(ObjCInterfaceType), TypeAlignment); 2834 ObjCInterfaceType *T = new (Mem) ObjCInterfaceType(Decl); 2835 Decl->TypeForDecl = T; 2836 Types.push_back(T); 2837 return QualType(T, 0); 2838} 2839 2840/// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique 2841/// TypeOfExprType AST's (since expression's are never shared). For example, 2842/// multiple declarations that refer to "typeof(x)" all contain different 2843/// DeclRefExpr's. This doesn't effect the type checker, since it operates 2844/// on canonical type's (which are always unique). 2845QualType ASTContext::getTypeOfExprType(Expr *tofExpr) const { 2846 TypeOfExprType *toe; 2847 if (tofExpr->isTypeDependent()) { 2848 llvm::FoldingSetNodeID ID; 2849 DependentTypeOfExprType::Profile(ID, *this, tofExpr); 2850 2851 void *InsertPos = 0; 2852 DependentTypeOfExprType *Canon 2853 = DependentTypeOfExprTypes.FindNodeOrInsertPos(ID, InsertPos); 2854 if (Canon) { 2855 // We already have a "canonical" version of an identical, dependent 2856 // typeof(expr) type. Use that as our canonical type. 2857 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, 2858 QualType((TypeOfExprType*)Canon, 0)); 2859 } else { 2860 // Build a new, canonical typeof(expr) type. 2861 Canon 2862 = new (*this, TypeAlignment) DependentTypeOfExprType(*this, tofExpr); 2863 DependentTypeOfExprTypes.InsertNode(Canon, InsertPos); 2864 toe = Canon; 2865 } 2866 } else { 2867 QualType Canonical = getCanonicalType(tofExpr->getType()); 2868 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, Canonical); 2869 } 2870 Types.push_back(toe); 2871 return QualType(toe, 0); 2872} 2873 2874/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique 2875/// TypeOfType AST's. The only motivation to unique these nodes would be 2876/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be 2877/// an issue. This doesn't effect the type checker, since it operates 2878/// on canonical type's (which are always unique). 2879QualType ASTContext::getTypeOfType(QualType tofType) const { 2880 QualType Canonical = getCanonicalType(tofType); 2881 TypeOfType *tot = new (*this, TypeAlignment) TypeOfType(tofType, Canonical); 2882 Types.push_back(tot); 2883 return QualType(tot, 0); 2884} 2885 2886/// getDecltypeForExpr - Given an expr, will return the decltype for that 2887/// expression, according to the rules in C++0x [dcl.type.simple]p4 2888static QualType getDecltypeForExpr(const Expr *e, const ASTContext &Context) { 2889 if (e->isTypeDependent()) 2890 return Context.DependentTy; 2891 2892 // If e is an id expression or a class member access, decltype(e) is defined 2893 // as the type of the entity named by e. 2894 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(e)) { 2895 if (const ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl())) 2896 return VD->getType(); 2897 } 2898 if (const MemberExpr *ME = dyn_cast<MemberExpr>(e)) { 2899 if (const FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) 2900 return FD->getType(); 2901 } 2902 // If e is a function call or an invocation of an overloaded operator, 2903 // (parentheses around e are ignored), decltype(e) is defined as the 2904 // return type of that function. 2905 if (const CallExpr *CE = dyn_cast<CallExpr>(e->IgnoreParens())) 2906 return CE->getCallReturnType(); 2907 2908 QualType T = e->getType(); 2909 2910 // Otherwise, where T is the type of e, if e is an lvalue, decltype(e) is 2911 // defined as T&, otherwise decltype(e) is defined as T. 2912 if (e->isLValue()) 2913 T = Context.getLValueReferenceType(T); 2914 2915 return T; 2916} 2917 2918/// getDecltypeType - Unlike many "get<Type>" functions, we don't unique 2919/// DecltypeType AST's. The only motivation to unique these nodes would be 2920/// memory savings. Since decltype(t) is fairly uncommon, space shouldn't be 2921/// an issue. This doesn't effect the type checker, since it operates 2922/// on canonical types (which are always unique). 2923QualType ASTContext::getDecltypeType(Expr *e) const { 2924 DecltypeType *dt; 2925 2926 // C++0x [temp.type]p2: 2927 // If an expression e involves a template parameter, decltype(e) denotes a 2928 // unique dependent type. Two such decltype-specifiers refer to the same 2929 // type only if their expressions are equivalent (14.5.6.1). 2930 if (e->isInstantiationDependent()) { 2931 llvm::FoldingSetNodeID ID; 2932 DependentDecltypeType::Profile(ID, *this, e); 2933 2934 void *InsertPos = 0; 2935 DependentDecltypeType *Canon 2936 = DependentDecltypeTypes.FindNodeOrInsertPos(ID, InsertPos); 2937 if (Canon) { 2938 // We already have a "canonical" version of an equivalent, dependent 2939 // decltype type. Use that as our canonical type. 2940 dt = new (*this, TypeAlignment) DecltypeType(e, DependentTy, 2941 QualType((DecltypeType*)Canon, 0)); 2942 } else { 2943 // Build a new, canonical typeof(expr) type. 2944 Canon = new (*this, TypeAlignment) DependentDecltypeType(*this, e); 2945 DependentDecltypeTypes.InsertNode(Canon, InsertPos); 2946 dt = Canon; 2947 } 2948 } else { 2949 QualType T = getDecltypeForExpr(e, *this); 2950 dt = new (*this, TypeAlignment) DecltypeType(e, T, getCanonicalType(T)); 2951 } 2952 Types.push_back(dt); 2953 return QualType(dt, 0); 2954} 2955 2956/// getUnaryTransformationType - We don't unique these, since the memory 2957/// savings are minimal and these are rare. 2958QualType ASTContext::getUnaryTransformType(QualType BaseType, 2959 QualType UnderlyingType, 2960 UnaryTransformType::UTTKind Kind) 2961 const { 2962 UnaryTransformType *Ty = 2963 new (*this, TypeAlignment) UnaryTransformType (BaseType, UnderlyingType, 2964 Kind, 2965 UnderlyingType->isDependentType() ? 2966 QualType() : UnderlyingType); 2967 Types.push_back(Ty); 2968 return QualType(Ty, 0); 2969} 2970 2971/// getAutoType - We only unique auto types after they've been deduced. 2972QualType ASTContext::getAutoType(QualType DeducedType) const { 2973 void *InsertPos = 0; 2974 if (!DeducedType.isNull()) { 2975 // Look in the folding set for an existing type. 2976 llvm::FoldingSetNodeID ID; 2977 AutoType::Profile(ID, DeducedType); 2978 if (AutoType *AT = AutoTypes.FindNodeOrInsertPos(ID, InsertPos)) 2979 return QualType(AT, 0); 2980 } 2981 2982 AutoType *AT = new (*this, TypeAlignment) AutoType(DeducedType); 2983 Types.push_back(AT); 2984 if (InsertPos) 2985 AutoTypes.InsertNode(AT, InsertPos); 2986 return QualType(AT, 0); 2987} 2988 2989/// getAtomicType - Return the uniqued reference to the atomic type for 2990/// the given value type. 2991QualType ASTContext::getAtomicType(QualType T) const { 2992 // Unique pointers, to guarantee there is only one pointer of a particular 2993 // structure. 2994 llvm::FoldingSetNodeID ID; 2995 AtomicType::Profile(ID, T); 2996 2997 void *InsertPos = 0; 2998 if (AtomicType *AT = AtomicTypes.FindNodeOrInsertPos(ID, InsertPos)) 2999 return QualType(AT, 0); 3000 3001 // If the atomic value type isn't canonical, this won't be a canonical type 3002 // either, so fill in the canonical type field. 3003 QualType Canonical; 3004 if (!T.isCanonical()) { 3005 Canonical = getAtomicType(getCanonicalType(T)); 3006 3007 // Get the new insert position for the node we care about. 3008 AtomicType *NewIP = AtomicTypes.FindNodeOrInsertPos(ID, InsertPos); 3009 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 3010 } 3011 AtomicType *New = new (*this, TypeAlignment) AtomicType(T, Canonical); 3012 Types.push_back(New); 3013 AtomicTypes.InsertNode(New, InsertPos); 3014 return QualType(New, 0); 3015} 3016 3017/// getAutoDeductType - Get type pattern for deducing against 'auto'. 3018QualType ASTContext::getAutoDeductType() const { 3019 if (AutoDeductTy.isNull()) 3020 AutoDeductTy = getAutoType(QualType()); 3021 assert(!AutoDeductTy.isNull() && "can't build 'auto' pattern"); 3022 return AutoDeductTy; 3023} 3024 3025/// getAutoRRefDeductType - Get type pattern for deducing against 'auto &&'. 3026QualType ASTContext::getAutoRRefDeductType() const { 3027 if (AutoRRefDeductTy.isNull()) 3028 AutoRRefDeductTy = getRValueReferenceType(getAutoDeductType()); 3029 assert(!AutoRRefDeductTy.isNull() && "can't build 'auto &&' pattern"); 3030 return AutoRRefDeductTy; 3031} 3032 3033/// getTagDeclType - Return the unique reference to the type for the 3034/// specified TagDecl (struct/union/class/enum) decl. 3035QualType ASTContext::getTagDeclType(const TagDecl *Decl) const { 3036 assert (Decl); 3037 // FIXME: What is the design on getTagDeclType when it requires casting 3038 // away const? mutable? 3039 return getTypeDeclType(const_cast<TagDecl*>(Decl)); 3040} 3041 3042/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result 3043/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and 3044/// needs to agree with the definition in <stddef.h>. 3045CanQualType ASTContext::getSizeType() const { 3046 return getFromTargetType(Target->getSizeType()); 3047} 3048 3049/// getIntMaxType - Return the unique type for "intmax_t" (C99 7.18.1.5). 3050CanQualType ASTContext::getIntMaxType() const { 3051 return getFromTargetType(Target->getIntMaxType()); 3052} 3053 3054/// getUIntMaxType - Return the unique type for "uintmax_t" (C99 7.18.1.5). 3055CanQualType ASTContext::getUIntMaxType() const { 3056 return getFromTargetType(Target->getUIntMaxType()); 3057} 3058 3059/// getSignedWCharType - Return the type of "signed wchar_t". 3060/// Used when in C++, as a GCC extension. 3061QualType ASTContext::getSignedWCharType() const { 3062 // FIXME: derive from "Target" ? 3063 return WCharTy; 3064} 3065 3066/// getUnsignedWCharType - Return the type of "unsigned wchar_t". 3067/// Used when in C++, as a GCC extension. 3068QualType ASTContext::getUnsignedWCharType() const { 3069 // FIXME: derive from "Target" ? 3070 return UnsignedIntTy; 3071} 3072 3073/// getPointerDiffType - Return the unique type for "ptrdiff_t" (C99 7.17) 3074/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 3075QualType ASTContext::getPointerDiffType() const { 3076 return getFromTargetType(Target->getPtrDiffType(0)); 3077} 3078 3079//===----------------------------------------------------------------------===// 3080// Type Operators 3081//===----------------------------------------------------------------------===// 3082 3083CanQualType ASTContext::getCanonicalParamType(QualType T) const { 3084 // Push qualifiers into arrays, and then discard any remaining 3085 // qualifiers. 3086 T = getCanonicalType(T); 3087 T = getVariableArrayDecayedType(T); 3088 const Type *Ty = T.getTypePtr(); 3089 QualType Result; 3090 if (isa<ArrayType>(Ty)) { 3091 Result = getArrayDecayedType(QualType(Ty,0)); 3092 } else if (isa<FunctionType>(Ty)) { 3093 Result = getPointerType(QualType(Ty, 0)); 3094 } else { 3095 Result = QualType(Ty, 0); 3096 } 3097 3098 return CanQualType::CreateUnsafe(Result); 3099} 3100 3101QualType ASTContext::getUnqualifiedArrayType(QualType type, 3102 Qualifiers &quals) { 3103 SplitQualType splitType = type.getSplitUnqualifiedType(); 3104 3105 // FIXME: getSplitUnqualifiedType() actually walks all the way to 3106 // the unqualified desugared type and then drops it on the floor. 3107 // We then have to strip that sugar back off with 3108 // getUnqualifiedDesugaredType(), which is silly. 3109 const ArrayType *AT = 3110 dyn_cast<ArrayType>(splitType.first->getUnqualifiedDesugaredType()); 3111 3112 // If we don't have an array, just use the results in splitType. 3113 if (!AT) { 3114 quals = splitType.second; 3115 return QualType(splitType.first, 0); 3116 } 3117 3118 // Otherwise, recurse on the array's element type. 3119 QualType elementType = AT->getElementType(); 3120 QualType unqualElementType = getUnqualifiedArrayType(elementType, quals); 3121 3122 // If that didn't change the element type, AT has no qualifiers, so we 3123 // can just use the results in splitType. 3124 if (elementType == unqualElementType) { 3125 assert(quals.empty()); // from the recursive call 3126 quals = splitType.second; 3127 return QualType(splitType.first, 0); 3128 } 3129 3130 // Otherwise, add in the qualifiers from the outermost type, then 3131 // build the type back up. 3132 quals.addConsistentQualifiers(splitType.second); 3133 3134 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) { 3135 return getConstantArrayType(unqualElementType, CAT->getSize(), 3136 CAT->getSizeModifier(), 0); 3137 } 3138 3139 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) { 3140 return getIncompleteArrayType(unqualElementType, IAT->getSizeModifier(), 0); 3141 } 3142 3143 if (const VariableArrayType *VAT = dyn_cast<VariableArrayType>(AT)) { 3144 return getVariableArrayType(unqualElementType, 3145 VAT->getSizeExpr(), 3146 VAT->getSizeModifier(), 3147 VAT->getIndexTypeCVRQualifiers(), 3148 VAT->getBracketsRange()); 3149 } 3150 3151 const DependentSizedArrayType *DSAT = cast<DependentSizedArrayType>(AT); 3152 return getDependentSizedArrayType(unqualElementType, DSAT->getSizeExpr(), 3153 DSAT->getSizeModifier(), 0, 3154 SourceRange()); 3155} 3156 3157/// UnwrapSimilarPointerTypes - If T1 and T2 are pointer types that 3158/// may be similar (C++ 4.4), replaces T1 and T2 with the type that 3159/// they point to and return true. If T1 and T2 aren't pointer types 3160/// or pointer-to-member types, or if they are not similar at this 3161/// level, returns false and leaves T1 and T2 unchanged. Top-level 3162/// qualifiers on T1 and T2 are ignored. This function will typically 3163/// be called in a loop that successively "unwraps" pointer and 3164/// pointer-to-member types to compare them at each level. 3165bool ASTContext::UnwrapSimilarPointerTypes(QualType &T1, QualType &T2) { 3166 const PointerType *T1PtrType = T1->getAs<PointerType>(), 3167 *T2PtrType = T2->getAs<PointerType>(); 3168 if (T1PtrType && T2PtrType) { 3169 T1 = T1PtrType->getPointeeType(); 3170 T2 = T2PtrType->getPointeeType(); 3171 return true; 3172 } 3173 3174 const MemberPointerType *T1MPType = T1->getAs<MemberPointerType>(), 3175 *T2MPType = T2->getAs<MemberPointerType>(); 3176 if (T1MPType && T2MPType && 3177 hasSameUnqualifiedType(QualType(T1MPType->getClass(), 0), 3178 QualType(T2MPType->getClass(), 0))) { 3179 T1 = T1MPType->getPointeeType(); 3180 T2 = T2MPType->getPointeeType(); 3181 return true; 3182 } 3183 3184 if (getLangOptions().ObjC1) { 3185 const ObjCObjectPointerType *T1OPType = T1->getAs<ObjCObjectPointerType>(), 3186 *T2OPType = T2->getAs<ObjCObjectPointerType>(); 3187 if (T1OPType && T2OPType) { 3188 T1 = T1OPType->getPointeeType(); 3189 T2 = T2OPType->getPointeeType(); 3190 return true; 3191 } 3192 } 3193 3194 // FIXME: Block pointers, too? 3195 3196 return false; 3197} 3198 3199DeclarationNameInfo 3200ASTContext::getNameForTemplate(TemplateName Name, 3201 SourceLocation NameLoc) const { 3202 switch (Name.getKind()) { 3203 case TemplateName::QualifiedTemplate: 3204 case TemplateName::Template: 3205 // DNInfo work in progress: CHECKME: what about DNLoc? 3206 return DeclarationNameInfo(Name.getAsTemplateDecl()->getDeclName(), 3207 NameLoc); 3208 3209 case TemplateName::OverloadedTemplate: { 3210 OverloadedTemplateStorage *Storage = Name.getAsOverloadedTemplate(); 3211 // DNInfo work in progress: CHECKME: what about DNLoc? 3212 return DeclarationNameInfo((*Storage->begin())->getDeclName(), NameLoc); 3213 } 3214 3215 case TemplateName::DependentTemplate: { 3216 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 3217 DeclarationName DName; 3218 if (DTN->isIdentifier()) { 3219 DName = DeclarationNames.getIdentifier(DTN->getIdentifier()); 3220 return DeclarationNameInfo(DName, NameLoc); 3221 } else { 3222 DName = DeclarationNames.getCXXOperatorName(DTN->getOperator()); 3223 // DNInfo work in progress: FIXME: source locations? 3224 DeclarationNameLoc DNLoc; 3225 DNLoc.CXXOperatorName.BeginOpNameLoc = SourceLocation().getRawEncoding(); 3226 DNLoc.CXXOperatorName.EndOpNameLoc = SourceLocation().getRawEncoding(); 3227 return DeclarationNameInfo(DName, NameLoc, DNLoc); 3228 } 3229 } 3230 3231 case TemplateName::SubstTemplateTemplateParm: { 3232 SubstTemplateTemplateParmStorage *subst 3233 = Name.getAsSubstTemplateTemplateParm(); 3234 return DeclarationNameInfo(subst->getParameter()->getDeclName(), 3235 NameLoc); 3236 } 3237 3238 case TemplateName::SubstTemplateTemplateParmPack: { 3239 SubstTemplateTemplateParmPackStorage *subst 3240 = Name.getAsSubstTemplateTemplateParmPack(); 3241 return DeclarationNameInfo(subst->getParameterPack()->getDeclName(), 3242 NameLoc); 3243 } 3244 } 3245 3246 llvm_unreachable("bad template name kind!"); 3247} 3248 3249TemplateName ASTContext::getCanonicalTemplateName(TemplateName Name) const { 3250 switch (Name.getKind()) { 3251 case TemplateName::QualifiedTemplate: 3252 case TemplateName::Template: { 3253 TemplateDecl *Template = Name.getAsTemplateDecl(); 3254 if (TemplateTemplateParmDecl *TTP 3255 = dyn_cast<TemplateTemplateParmDecl>(Template)) 3256 Template = getCanonicalTemplateTemplateParmDecl(TTP); 3257 3258 // The canonical template name is the canonical template declaration. 3259 return TemplateName(cast<TemplateDecl>(Template->getCanonicalDecl())); 3260 } 3261 3262 case TemplateName::OverloadedTemplate: 3263 llvm_unreachable("cannot canonicalize overloaded template"); 3264 3265 case TemplateName::DependentTemplate: { 3266 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 3267 assert(DTN && "Non-dependent template names must refer to template decls."); 3268 return DTN->CanonicalTemplateName; 3269 } 3270 3271 case TemplateName::SubstTemplateTemplateParm: { 3272 SubstTemplateTemplateParmStorage *subst 3273 = Name.getAsSubstTemplateTemplateParm(); 3274 return getCanonicalTemplateName(subst->getReplacement()); 3275 } 3276 3277 case TemplateName::SubstTemplateTemplateParmPack: { 3278 SubstTemplateTemplateParmPackStorage *subst 3279 = Name.getAsSubstTemplateTemplateParmPack(); 3280 TemplateTemplateParmDecl *canonParameter 3281 = getCanonicalTemplateTemplateParmDecl(subst->getParameterPack()); 3282 TemplateArgument canonArgPack 3283 = getCanonicalTemplateArgument(subst->getArgumentPack()); 3284 return getSubstTemplateTemplateParmPack(canonParameter, canonArgPack); 3285 } 3286 } 3287 3288 llvm_unreachable("bad template name!"); 3289} 3290 3291bool ASTContext::hasSameTemplateName(TemplateName X, TemplateName Y) { 3292 X = getCanonicalTemplateName(X); 3293 Y = getCanonicalTemplateName(Y); 3294 return X.getAsVoidPointer() == Y.getAsVoidPointer(); 3295} 3296 3297TemplateArgument 3298ASTContext::getCanonicalTemplateArgument(const TemplateArgument &Arg) const { 3299 switch (Arg.getKind()) { 3300 case TemplateArgument::Null: 3301 return Arg; 3302 3303 case TemplateArgument::Expression: 3304 return Arg; 3305 3306 case TemplateArgument::Declaration: 3307 return TemplateArgument(Arg.getAsDecl()->getCanonicalDecl()); 3308 3309 case TemplateArgument::Template: 3310 return TemplateArgument(getCanonicalTemplateName(Arg.getAsTemplate())); 3311 3312 case TemplateArgument::TemplateExpansion: 3313 return TemplateArgument(getCanonicalTemplateName( 3314 Arg.getAsTemplateOrTemplatePattern()), 3315 Arg.getNumTemplateExpansions()); 3316 3317 case TemplateArgument::Integral: 3318 return TemplateArgument(*Arg.getAsIntegral(), 3319 getCanonicalType(Arg.getIntegralType())); 3320 3321 case TemplateArgument::Type: 3322 return TemplateArgument(getCanonicalType(Arg.getAsType())); 3323 3324 case TemplateArgument::Pack: { 3325 if (Arg.pack_size() == 0) 3326 return Arg; 3327 3328 TemplateArgument *CanonArgs 3329 = new (*this) TemplateArgument[Arg.pack_size()]; 3330 unsigned Idx = 0; 3331 for (TemplateArgument::pack_iterator A = Arg.pack_begin(), 3332 AEnd = Arg.pack_end(); 3333 A != AEnd; (void)++A, ++Idx) 3334 CanonArgs[Idx] = getCanonicalTemplateArgument(*A); 3335 3336 return TemplateArgument(CanonArgs, Arg.pack_size()); 3337 } 3338 } 3339 3340 // Silence GCC warning 3341 llvm_unreachable("Unhandled template argument kind"); 3342} 3343 3344NestedNameSpecifier * 3345ASTContext::getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) const { 3346 if (!NNS) 3347 return 0; 3348 3349 switch (NNS->getKind()) { 3350 case NestedNameSpecifier::Identifier: 3351 // Canonicalize the prefix but keep the identifier the same. 3352 return NestedNameSpecifier::Create(*this, 3353 getCanonicalNestedNameSpecifier(NNS->getPrefix()), 3354 NNS->getAsIdentifier()); 3355 3356 case NestedNameSpecifier::Namespace: 3357 // A namespace is canonical; build a nested-name-specifier with 3358 // this namespace and no prefix. 3359 return NestedNameSpecifier::Create(*this, 0, 3360 NNS->getAsNamespace()->getOriginalNamespace()); 3361 3362 case NestedNameSpecifier::NamespaceAlias: 3363 // A namespace is canonical; build a nested-name-specifier with 3364 // this namespace and no prefix. 3365 return NestedNameSpecifier::Create(*this, 0, 3366 NNS->getAsNamespaceAlias()->getNamespace() 3367 ->getOriginalNamespace()); 3368 3369 case NestedNameSpecifier::TypeSpec: 3370 case NestedNameSpecifier::TypeSpecWithTemplate: { 3371 QualType T = getCanonicalType(QualType(NNS->getAsType(), 0)); 3372 3373 // If we have some kind of dependent-named type (e.g., "typename T::type"), 3374 // break it apart into its prefix and identifier, then reconsititute those 3375 // as the canonical nested-name-specifier. This is required to canonicalize 3376 // a dependent nested-name-specifier involving typedefs of dependent-name 3377 // types, e.g., 3378 // typedef typename T::type T1; 3379 // typedef typename T1::type T2; 3380 if (const DependentNameType *DNT = T->getAs<DependentNameType>()) { 3381 NestedNameSpecifier *Prefix 3382 = getCanonicalNestedNameSpecifier(DNT->getQualifier()); 3383 return NestedNameSpecifier::Create(*this, Prefix, 3384 const_cast<IdentifierInfo *>(DNT->getIdentifier())); 3385 } 3386 3387 // Do the same thing as above, but with dependent-named specializations. 3388 if (const DependentTemplateSpecializationType *DTST 3389 = T->getAs<DependentTemplateSpecializationType>()) { 3390 NestedNameSpecifier *Prefix 3391 = getCanonicalNestedNameSpecifier(DTST->getQualifier()); 3392 3393 T = getDependentTemplateSpecializationType(DTST->getKeyword(), 3394 Prefix, DTST->getIdentifier(), 3395 DTST->getNumArgs(), 3396 DTST->getArgs()); 3397 T = getCanonicalType(T); 3398 } 3399 3400 return NestedNameSpecifier::Create(*this, 0, false, 3401 const_cast<Type*>(T.getTypePtr())); 3402 } 3403 3404 case NestedNameSpecifier::Global: 3405 // The global specifier is canonical and unique. 3406 return NNS; 3407 } 3408 3409 llvm_unreachable("Invalid NestedNameSpecifier::Kind!"); 3410} 3411 3412 3413const ArrayType *ASTContext::getAsArrayType(QualType T) const { 3414 // Handle the non-qualified case efficiently. 3415 if (!T.hasLocalQualifiers()) { 3416 // Handle the common positive case fast. 3417 if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 3418 return AT; 3419 } 3420 3421 // Handle the common negative case fast. 3422 if (!isa<ArrayType>(T.getCanonicalType())) 3423 return 0; 3424 3425 // Apply any qualifiers from the array type to the element type. This 3426 // implements C99 6.7.3p8: "If the specification of an array type includes 3427 // any type qualifiers, the element type is so qualified, not the array type." 3428 3429 // If we get here, we either have type qualifiers on the type, or we have 3430 // sugar such as a typedef in the way. If we have type qualifiers on the type 3431 // we must propagate them down into the element type. 3432 3433 SplitQualType split = T.getSplitDesugaredType(); 3434 Qualifiers qs = split.second; 3435 3436 // If we have a simple case, just return now. 3437 const ArrayType *ATy = dyn_cast<ArrayType>(split.first); 3438 if (ATy == 0 || qs.empty()) 3439 return ATy; 3440 3441 // Otherwise, we have an array and we have qualifiers on it. Push the 3442 // qualifiers into the array element type and return a new array type. 3443 QualType NewEltTy = getQualifiedType(ATy->getElementType(), qs); 3444 3445 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy)) 3446 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(), 3447 CAT->getSizeModifier(), 3448 CAT->getIndexTypeCVRQualifiers())); 3449 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy)) 3450 return cast<ArrayType>(getIncompleteArrayType(NewEltTy, 3451 IAT->getSizeModifier(), 3452 IAT->getIndexTypeCVRQualifiers())); 3453 3454 if (const DependentSizedArrayType *DSAT 3455 = dyn_cast<DependentSizedArrayType>(ATy)) 3456 return cast<ArrayType>( 3457 getDependentSizedArrayType(NewEltTy, 3458 DSAT->getSizeExpr(), 3459 DSAT->getSizeModifier(), 3460 DSAT->getIndexTypeCVRQualifiers(), 3461 DSAT->getBracketsRange())); 3462 3463 const VariableArrayType *VAT = cast<VariableArrayType>(ATy); 3464 return cast<ArrayType>(getVariableArrayType(NewEltTy, 3465 VAT->getSizeExpr(), 3466 VAT->getSizeModifier(), 3467 VAT->getIndexTypeCVRQualifiers(), 3468 VAT->getBracketsRange())); 3469} 3470 3471QualType ASTContext::getAdjustedParameterType(QualType T) { 3472 // C99 6.7.5.3p7: 3473 // A declaration of a parameter as "array of type" shall be 3474 // adjusted to "qualified pointer to type", where the type 3475 // qualifiers (if any) are those specified within the [ and ] of 3476 // the array type derivation. 3477 if (T->isArrayType()) 3478 return getArrayDecayedType(T); 3479 3480 // C99 6.7.5.3p8: 3481 // A declaration of a parameter as "function returning type" 3482 // shall be adjusted to "pointer to function returning type", as 3483 // in 6.3.2.1. 3484 if (T->isFunctionType()) 3485 return getPointerType(T); 3486 3487 return T; 3488} 3489 3490QualType ASTContext::getSignatureParameterType(QualType T) { 3491 T = getVariableArrayDecayedType(T); 3492 T = getAdjustedParameterType(T); 3493 return T.getUnqualifiedType(); 3494} 3495 3496/// getArrayDecayedType - Return the properly qualified result of decaying the 3497/// specified array type to a pointer. This operation is non-trivial when 3498/// handling typedefs etc. The canonical type of "T" must be an array type, 3499/// this returns a pointer to a properly qualified element of the array. 3500/// 3501/// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 3502QualType ASTContext::getArrayDecayedType(QualType Ty) const { 3503 // Get the element type with 'getAsArrayType' so that we don't lose any 3504 // typedefs in the element type of the array. This also handles propagation 3505 // of type qualifiers from the array type into the element type if present 3506 // (C99 6.7.3p8). 3507 const ArrayType *PrettyArrayType = getAsArrayType(Ty); 3508 assert(PrettyArrayType && "Not an array type!"); 3509 3510 QualType PtrTy = getPointerType(PrettyArrayType->getElementType()); 3511 3512 // int x[restrict 4] -> int *restrict 3513 return getQualifiedType(PtrTy, PrettyArrayType->getIndexTypeQualifiers()); 3514} 3515 3516QualType ASTContext::getBaseElementType(const ArrayType *array) const { 3517 return getBaseElementType(array->getElementType()); 3518} 3519 3520QualType ASTContext::getBaseElementType(QualType type) const { 3521 Qualifiers qs; 3522 while (true) { 3523 SplitQualType split = type.getSplitDesugaredType(); 3524 const ArrayType *array = split.first->getAsArrayTypeUnsafe(); 3525 if (!array) break; 3526 3527 type = array->getElementType(); 3528 qs.addConsistentQualifiers(split.second); 3529 } 3530 3531 return getQualifiedType(type, qs); 3532} 3533 3534/// getConstantArrayElementCount - Returns number of constant array elements. 3535uint64_t 3536ASTContext::getConstantArrayElementCount(const ConstantArrayType *CA) const { 3537 uint64_t ElementCount = 1; 3538 do { 3539 ElementCount *= CA->getSize().getZExtValue(); 3540 CA = dyn_cast<ConstantArrayType>(CA->getElementType()); 3541 } while (CA); 3542 return ElementCount; 3543} 3544 3545/// getFloatingRank - Return a relative rank for floating point types. 3546/// This routine will assert if passed a built-in type that isn't a float. 3547static FloatingRank getFloatingRank(QualType T) { 3548 if (const ComplexType *CT = T->getAs<ComplexType>()) 3549 return getFloatingRank(CT->getElementType()); 3550 3551 assert(T->getAs<BuiltinType>() && "getFloatingRank(): not a floating type"); 3552 switch (T->getAs<BuiltinType>()->getKind()) { 3553 default: llvm_unreachable("getFloatingRank(): not a floating type"); 3554 case BuiltinType::Half: return HalfRank; 3555 case BuiltinType::Float: return FloatRank; 3556 case BuiltinType::Double: return DoubleRank; 3557 case BuiltinType::LongDouble: return LongDoubleRank; 3558 } 3559} 3560 3561/// getFloatingTypeOfSizeWithinDomain - Returns a real floating 3562/// point or a complex type (based on typeDomain/typeSize). 3563/// 'typeDomain' is a real floating point or complex type. 3564/// 'typeSize' is a real floating point or complex type. 3565QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size, 3566 QualType Domain) const { 3567 FloatingRank EltRank = getFloatingRank(Size); 3568 if (Domain->isComplexType()) { 3569 switch (EltRank) { 3570 case HalfRank: llvm_unreachable("Complex half is not supported"); 3571 case FloatRank: return FloatComplexTy; 3572 case DoubleRank: return DoubleComplexTy; 3573 case LongDoubleRank: return LongDoubleComplexTy; 3574 } 3575 } 3576 3577 assert(Domain->isRealFloatingType() && "Unknown domain!"); 3578 switch (EltRank) { 3579 case HalfRank: llvm_unreachable("Half ranks are not valid here"); 3580 case FloatRank: return FloatTy; 3581 case DoubleRank: return DoubleTy; 3582 case LongDoubleRank: return LongDoubleTy; 3583 } 3584 llvm_unreachable("getFloatingRank(): illegal value for rank"); 3585} 3586 3587/// getFloatingTypeOrder - Compare the rank of the two specified floating 3588/// point types, ignoring the domain of the type (i.e. 'double' == 3589/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 3590/// LHS < RHS, return -1. 3591int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) const { 3592 FloatingRank LHSR = getFloatingRank(LHS); 3593 FloatingRank RHSR = getFloatingRank(RHS); 3594 3595 if (LHSR == RHSR) 3596 return 0; 3597 if (LHSR > RHSR) 3598 return 1; 3599 return -1; 3600} 3601 3602/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This 3603/// routine will assert if passed a built-in type that isn't an integer or enum, 3604/// or if it is not canonicalized. 3605unsigned ASTContext::getIntegerRank(const Type *T) const { 3606 assert(T->isCanonicalUnqualified() && "T should be canonicalized"); 3607 3608 switch (cast<BuiltinType>(T)->getKind()) { 3609 default: llvm_unreachable("getIntegerRank(): not a built-in integer"); 3610 case BuiltinType::Bool: 3611 return 1 + (getIntWidth(BoolTy) << 3); 3612 case BuiltinType::Char_S: 3613 case BuiltinType::Char_U: 3614 case BuiltinType::SChar: 3615 case BuiltinType::UChar: 3616 return 2 + (getIntWidth(CharTy) << 3); 3617 case BuiltinType::Short: 3618 case BuiltinType::UShort: 3619 return 3 + (getIntWidth(ShortTy) << 3); 3620 case BuiltinType::Int: 3621 case BuiltinType::UInt: 3622 return 4 + (getIntWidth(IntTy) << 3); 3623 case BuiltinType::Long: 3624 case BuiltinType::ULong: 3625 return 5 + (getIntWidth(LongTy) << 3); 3626 case BuiltinType::LongLong: 3627 case BuiltinType::ULongLong: 3628 return 6 + (getIntWidth(LongLongTy) << 3); 3629 case BuiltinType::Int128: 3630 case BuiltinType::UInt128: 3631 return 7 + (getIntWidth(Int128Ty) << 3); 3632 } 3633} 3634 3635/// \brief Whether this is a promotable bitfield reference according 3636/// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 3637/// 3638/// \returns the type this bit-field will promote to, or NULL if no 3639/// promotion occurs. 3640QualType ASTContext::isPromotableBitField(Expr *E) const { 3641 if (E->isTypeDependent() || E->isValueDependent()) 3642 return QualType(); 3643 3644 FieldDecl *Field = E->getBitField(); 3645 if (!Field) 3646 return QualType(); 3647 3648 QualType FT = Field->getType(); 3649 3650 uint64_t BitWidth = Field->getBitWidthValue(*this); 3651 uint64_t IntSize = getTypeSize(IntTy); 3652 // GCC extension compatibility: if the bit-field size is less than or equal 3653 // to the size of int, it gets promoted no matter what its type is. 3654 // For instance, unsigned long bf : 4 gets promoted to signed int. 3655 if (BitWidth < IntSize) 3656 return IntTy; 3657 3658 if (BitWidth == IntSize) 3659 return FT->isSignedIntegerType() ? IntTy : UnsignedIntTy; 3660 3661 // Types bigger than int are not subject to promotions, and therefore act 3662 // like the base type. 3663 // FIXME: This doesn't quite match what gcc does, but what gcc does here 3664 // is ridiculous. 3665 return QualType(); 3666} 3667 3668/// getPromotedIntegerType - Returns the type that Promotable will 3669/// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 3670/// integer type. 3671QualType ASTContext::getPromotedIntegerType(QualType Promotable) const { 3672 assert(!Promotable.isNull()); 3673 assert(Promotable->isPromotableIntegerType()); 3674 if (const EnumType *ET = Promotable->getAs<EnumType>()) 3675 return ET->getDecl()->getPromotionType(); 3676 3677 if (const BuiltinType *BT = Promotable->getAs<BuiltinType>()) { 3678 // C++ [conv.prom]: A prvalue of type char16_t, char32_t, or wchar_t 3679 // (3.9.1) can be converted to a prvalue of the first of the following 3680 // types that can represent all the values of its underlying type: 3681 // int, unsigned int, long int, unsigned long int, long long int, or 3682 // unsigned long long int [...] 3683 // FIXME: Is there some better way to compute this? 3684 if (BT->getKind() == BuiltinType::WChar_S || 3685 BT->getKind() == BuiltinType::WChar_U || 3686 BT->getKind() == BuiltinType::Char16 || 3687 BT->getKind() == BuiltinType::Char32) { 3688 bool FromIsSigned = BT->getKind() == BuiltinType::WChar_S; 3689 uint64_t FromSize = getTypeSize(BT); 3690 QualType PromoteTypes[] = { IntTy, UnsignedIntTy, LongTy, UnsignedLongTy, 3691 LongLongTy, UnsignedLongLongTy }; 3692 for (size_t Idx = 0; Idx < llvm::array_lengthof(PromoteTypes); ++Idx) { 3693 uint64_t ToSize = getTypeSize(PromoteTypes[Idx]); 3694 if (FromSize < ToSize || 3695 (FromSize == ToSize && 3696 FromIsSigned == PromoteTypes[Idx]->isSignedIntegerType())) 3697 return PromoteTypes[Idx]; 3698 } 3699 llvm_unreachable("char type should fit into long long"); 3700 } 3701 } 3702 3703 // At this point, we should have a signed or unsigned integer type. 3704 if (Promotable->isSignedIntegerType()) 3705 return IntTy; 3706 uint64_t PromotableSize = getTypeSize(Promotable); 3707 uint64_t IntSize = getTypeSize(IntTy); 3708 assert(Promotable->isUnsignedIntegerType() && PromotableSize <= IntSize); 3709 return (PromotableSize != IntSize) ? IntTy : UnsignedIntTy; 3710} 3711 3712/// \brief Recurses in pointer/array types until it finds an objc retainable 3713/// type and returns its ownership. 3714Qualifiers::ObjCLifetime ASTContext::getInnerObjCOwnership(QualType T) const { 3715 while (!T.isNull()) { 3716 if (T.getObjCLifetime() != Qualifiers::OCL_None) 3717 return T.getObjCLifetime(); 3718 if (T->isArrayType()) 3719 T = getBaseElementType(T); 3720 else if (const PointerType *PT = T->getAs<PointerType>()) 3721 T = PT->getPointeeType(); 3722 else if (const ReferenceType *RT = T->getAs<ReferenceType>()) 3723 T = RT->getPointeeType(); 3724 else 3725 break; 3726 } 3727 3728 return Qualifiers::OCL_None; 3729} 3730 3731/// getIntegerTypeOrder - Returns the highest ranked integer type: 3732/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 3733/// LHS < RHS, return -1. 3734int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) const { 3735 const Type *LHSC = getCanonicalType(LHS).getTypePtr(); 3736 const Type *RHSC = getCanonicalType(RHS).getTypePtr(); 3737 if (LHSC == RHSC) return 0; 3738 3739 bool LHSUnsigned = LHSC->isUnsignedIntegerType(); 3740 bool RHSUnsigned = RHSC->isUnsignedIntegerType(); 3741 3742 unsigned LHSRank = getIntegerRank(LHSC); 3743 unsigned RHSRank = getIntegerRank(RHSC); 3744 3745 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned. 3746 if (LHSRank == RHSRank) return 0; 3747 return LHSRank > RHSRank ? 1 : -1; 3748 } 3749 3750 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa. 3751 if (LHSUnsigned) { 3752 // If the unsigned [LHS] type is larger, return it. 3753 if (LHSRank >= RHSRank) 3754 return 1; 3755 3756 // If the signed type can represent all values of the unsigned type, it 3757 // wins. Because we are dealing with 2's complement and types that are 3758 // powers of two larger than each other, this is always safe. 3759 return -1; 3760 } 3761 3762 // If the unsigned [RHS] type is larger, return it. 3763 if (RHSRank >= LHSRank) 3764 return -1; 3765 3766 // If the signed type can represent all values of the unsigned type, it 3767 // wins. Because we are dealing with 2's complement and types that are 3768 // powers of two larger than each other, this is always safe. 3769 return 1; 3770} 3771 3772static RecordDecl * 3773CreateRecordDecl(const ASTContext &Ctx, RecordDecl::TagKind TK, 3774 DeclContext *DC, IdentifierInfo *Id) { 3775 SourceLocation Loc; 3776 if (Ctx.getLangOptions().CPlusPlus) 3777 return CXXRecordDecl::Create(Ctx, TK, DC, Loc, Loc, Id); 3778 else 3779 return RecordDecl::Create(Ctx, TK, DC, Loc, Loc, Id); 3780} 3781 3782// getCFConstantStringType - Return the type used for constant CFStrings. 3783QualType ASTContext::getCFConstantStringType() const { 3784 if (!CFConstantStringTypeDecl) { 3785 CFConstantStringTypeDecl = 3786 CreateRecordDecl(*this, TTK_Struct, TUDecl, 3787 &Idents.get("NSConstantString")); 3788 CFConstantStringTypeDecl->startDefinition(); 3789 3790 QualType FieldTypes[4]; 3791 3792 // const int *isa; 3793 FieldTypes[0] = getPointerType(IntTy.withConst()); 3794 // int flags; 3795 FieldTypes[1] = IntTy; 3796 // const char *str; 3797 FieldTypes[2] = getPointerType(CharTy.withConst()); 3798 // long length; 3799 FieldTypes[3] = LongTy; 3800 3801 // Create fields 3802 for (unsigned i = 0; i < 4; ++i) { 3803 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl, 3804 SourceLocation(), 3805 SourceLocation(), 0, 3806 FieldTypes[i], /*TInfo=*/0, 3807 /*BitWidth=*/0, 3808 /*Mutable=*/false, 3809 /*HasInit=*/false); 3810 Field->setAccess(AS_public); 3811 CFConstantStringTypeDecl->addDecl(Field); 3812 } 3813 3814 CFConstantStringTypeDecl->completeDefinition(); 3815 } 3816 3817 return getTagDeclType(CFConstantStringTypeDecl); 3818} 3819 3820void ASTContext::setCFConstantStringType(QualType T) { 3821 const RecordType *Rec = T->getAs<RecordType>(); 3822 assert(Rec && "Invalid CFConstantStringType"); 3823 CFConstantStringTypeDecl = Rec->getDecl(); 3824} 3825 3826QualType ASTContext::getBlockDescriptorType() const { 3827 if (BlockDescriptorType) 3828 return getTagDeclType(BlockDescriptorType); 3829 3830 RecordDecl *T; 3831 // FIXME: Needs the FlagAppleBlock bit. 3832 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, 3833 &Idents.get("__block_descriptor")); 3834 T->startDefinition(); 3835 3836 QualType FieldTypes[] = { 3837 UnsignedLongTy, 3838 UnsignedLongTy, 3839 }; 3840 3841 const char *FieldNames[] = { 3842 "reserved", 3843 "Size" 3844 }; 3845 3846 for (size_t i = 0; i < 2; ++i) { 3847 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3848 SourceLocation(), 3849 &Idents.get(FieldNames[i]), 3850 FieldTypes[i], /*TInfo=*/0, 3851 /*BitWidth=*/0, 3852 /*Mutable=*/false, 3853 /*HasInit=*/false); 3854 Field->setAccess(AS_public); 3855 T->addDecl(Field); 3856 } 3857 3858 T->completeDefinition(); 3859 3860 BlockDescriptorType = T; 3861 3862 return getTagDeclType(BlockDescriptorType); 3863} 3864 3865QualType ASTContext::getBlockDescriptorExtendedType() const { 3866 if (BlockDescriptorExtendedType) 3867 return getTagDeclType(BlockDescriptorExtendedType); 3868 3869 RecordDecl *T; 3870 // FIXME: Needs the FlagAppleBlock bit. 3871 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, 3872 &Idents.get("__block_descriptor_withcopydispose")); 3873 T->startDefinition(); 3874 3875 QualType FieldTypes[] = { 3876 UnsignedLongTy, 3877 UnsignedLongTy, 3878 getPointerType(VoidPtrTy), 3879 getPointerType(VoidPtrTy) 3880 }; 3881 3882 const char *FieldNames[] = { 3883 "reserved", 3884 "Size", 3885 "CopyFuncPtr", 3886 "DestroyFuncPtr" 3887 }; 3888 3889 for (size_t i = 0; i < 4; ++i) { 3890 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3891 SourceLocation(), 3892 &Idents.get(FieldNames[i]), 3893 FieldTypes[i], /*TInfo=*/0, 3894 /*BitWidth=*/0, 3895 /*Mutable=*/false, 3896 /*HasInit=*/false); 3897 Field->setAccess(AS_public); 3898 T->addDecl(Field); 3899 } 3900 3901 T->completeDefinition(); 3902 3903 BlockDescriptorExtendedType = T; 3904 3905 return getTagDeclType(BlockDescriptorExtendedType); 3906} 3907 3908bool ASTContext::BlockRequiresCopying(QualType Ty) const { 3909 if (Ty->isObjCRetainableType()) 3910 return true; 3911 if (getLangOptions().CPlusPlus) { 3912 if (const RecordType *RT = Ty->getAs<RecordType>()) { 3913 CXXRecordDecl *RD = cast<CXXRecordDecl>(RT->getDecl()); 3914 return RD->hasConstCopyConstructor(); 3915 3916 } 3917 } 3918 return false; 3919} 3920 3921QualType 3922ASTContext::BuildByRefType(StringRef DeclName, QualType Ty) const { 3923 // type = struct __Block_byref_1_X { 3924 // void *__isa; 3925 // struct __Block_byref_1_X *__forwarding; 3926 // unsigned int __flags; 3927 // unsigned int __size; 3928 // void *__copy_helper; // as needed 3929 // void *__destroy_help // as needed 3930 // int X; 3931 // } * 3932 3933 bool HasCopyAndDispose = BlockRequiresCopying(Ty); 3934 3935 // FIXME: Move up 3936 llvm::SmallString<36> Name; 3937 llvm::raw_svector_ostream(Name) << "__Block_byref_" << 3938 ++UniqueBlockByRefTypeID << '_' << DeclName; 3939 RecordDecl *T; 3940 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, &Idents.get(Name.str())); 3941 T->startDefinition(); 3942 QualType Int32Ty = IntTy; 3943 assert(getIntWidth(IntTy) == 32 && "non-32bit int not supported"); 3944 QualType FieldTypes[] = { 3945 getPointerType(VoidPtrTy), 3946 getPointerType(getTagDeclType(T)), 3947 Int32Ty, 3948 Int32Ty, 3949 getPointerType(VoidPtrTy), 3950 getPointerType(VoidPtrTy), 3951 Ty 3952 }; 3953 3954 StringRef FieldNames[] = { 3955 "__isa", 3956 "__forwarding", 3957 "__flags", 3958 "__size", 3959 "__copy_helper", 3960 "__destroy_helper", 3961 DeclName, 3962 }; 3963 3964 for (size_t i = 0; i < 7; ++i) { 3965 if (!HasCopyAndDispose && i >=4 && i <= 5) 3966 continue; 3967 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3968 SourceLocation(), 3969 &Idents.get(FieldNames[i]), 3970 FieldTypes[i], /*TInfo=*/0, 3971 /*BitWidth=*/0, /*Mutable=*/false, 3972 /*HasInit=*/false); 3973 Field->setAccess(AS_public); 3974 T->addDecl(Field); 3975 } 3976 3977 T->completeDefinition(); 3978 3979 return getPointerType(getTagDeclType(T)); 3980} 3981 3982TypedefDecl *ASTContext::getObjCInstanceTypeDecl() { 3983 if (!ObjCInstanceTypeDecl) 3984 ObjCInstanceTypeDecl = TypedefDecl::Create(*this, 3985 getTranslationUnitDecl(), 3986 SourceLocation(), 3987 SourceLocation(), 3988 &Idents.get("instancetype"), 3989 getTrivialTypeSourceInfo(getObjCIdType())); 3990 return ObjCInstanceTypeDecl; 3991} 3992 3993// This returns true if a type has been typedefed to BOOL: 3994// typedef <type> BOOL; 3995static bool isTypeTypedefedAsBOOL(QualType T) { 3996 if (const TypedefType *TT = dyn_cast<TypedefType>(T)) 3997 if (IdentifierInfo *II = TT->getDecl()->getIdentifier()) 3998 return II->isStr("BOOL"); 3999 4000 return false; 4001} 4002 4003/// getObjCEncodingTypeSize returns size of type for objective-c encoding 4004/// purpose. 4005CharUnits ASTContext::getObjCEncodingTypeSize(QualType type) const { 4006 if (!type->isIncompleteArrayType() && type->isIncompleteType()) 4007 return CharUnits::Zero(); 4008 4009 CharUnits sz = getTypeSizeInChars(type); 4010 4011 // Make all integer and enum types at least as large as an int 4012 if (sz.isPositive() && type->isIntegralOrEnumerationType()) 4013 sz = std::max(sz, getTypeSizeInChars(IntTy)); 4014 // Treat arrays as pointers, since that's how they're passed in. 4015 else if (type->isArrayType()) 4016 sz = getTypeSizeInChars(VoidPtrTy); 4017 return sz; 4018} 4019 4020static inline 4021std::string charUnitsToString(const CharUnits &CU) { 4022 return llvm::itostr(CU.getQuantity()); 4023} 4024 4025/// getObjCEncodingForBlock - Return the encoded type for this block 4026/// declaration. 4027std::string ASTContext::getObjCEncodingForBlock(const BlockExpr *Expr) const { 4028 std::string S; 4029 4030 const BlockDecl *Decl = Expr->getBlockDecl(); 4031 QualType BlockTy = 4032 Expr->getType()->getAs<BlockPointerType>()->getPointeeType(); 4033 // Encode result type. 4034 getObjCEncodingForType(BlockTy->getAs<FunctionType>()->getResultType(), S); 4035 // Compute size of all parameters. 4036 // Start with computing size of a pointer in number of bytes. 4037 // FIXME: There might(should) be a better way of doing this computation! 4038 SourceLocation Loc; 4039 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 4040 CharUnits ParmOffset = PtrSize; 4041 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), 4042 E = Decl->param_end(); PI != E; ++PI) { 4043 QualType PType = (*PI)->getType(); 4044 CharUnits sz = getObjCEncodingTypeSize(PType); 4045 assert (sz.isPositive() && "BlockExpr - Incomplete param type"); 4046 ParmOffset += sz; 4047 } 4048 // Size of the argument frame 4049 S += charUnitsToString(ParmOffset); 4050 // Block pointer and offset. 4051 S += "@?0"; 4052 4053 // Argument types. 4054 ParmOffset = PtrSize; 4055 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), E = 4056 Decl->param_end(); PI != E; ++PI) { 4057 ParmVarDecl *PVDecl = *PI; 4058 QualType PType = PVDecl->getOriginalType(); 4059 if (const ArrayType *AT = 4060 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 4061 // Use array's original type only if it has known number of 4062 // elements. 4063 if (!isa<ConstantArrayType>(AT)) 4064 PType = PVDecl->getType(); 4065 } else if (PType->isFunctionType()) 4066 PType = PVDecl->getType(); 4067 getObjCEncodingForType(PType, S); 4068 S += charUnitsToString(ParmOffset); 4069 ParmOffset += getObjCEncodingTypeSize(PType); 4070 } 4071 4072 return S; 4073} 4074 4075bool ASTContext::getObjCEncodingForFunctionDecl(const FunctionDecl *Decl, 4076 std::string& S) { 4077 // Encode result type. 4078 getObjCEncodingForType(Decl->getResultType(), S); 4079 CharUnits ParmOffset; 4080 // Compute size of all parameters. 4081 for (FunctionDecl::param_const_iterator PI = Decl->param_begin(), 4082 E = Decl->param_end(); PI != E; ++PI) { 4083 QualType PType = (*PI)->getType(); 4084 CharUnits sz = getObjCEncodingTypeSize(PType); 4085 if (sz.isZero()) 4086 return true; 4087 4088 assert (sz.isPositive() && 4089 "getObjCEncodingForFunctionDecl - Incomplete param type"); 4090 ParmOffset += sz; 4091 } 4092 S += charUnitsToString(ParmOffset); 4093 ParmOffset = CharUnits::Zero(); 4094 4095 // Argument types. 4096 for (FunctionDecl::param_const_iterator PI = Decl->param_begin(), 4097 E = Decl->param_end(); PI != E; ++PI) { 4098 ParmVarDecl *PVDecl = *PI; 4099 QualType PType = PVDecl->getOriginalType(); 4100 if (const ArrayType *AT = 4101 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 4102 // Use array's original type only if it has known number of 4103 // elements. 4104 if (!isa<ConstantArrayType>(AT)) 4105 PType = PVDecl->getType(); 4106 } else if (PType->isFunctionType()) 4107 PType = PVDecl->getType(); 4108 getObjCEncodingForType(PType, S); 4109 S += charUnitsToString(ParmOffset); 4110 ParmOffset += getObjCEncodingTypeSize(PType); 4111 } 4112 4113 return false; 4114} 4115 4116/// getObjCEncodingForMethodParameter - Return the encoded type for a single 4117/// method parameter or return type. If Extended, include class names and 4118/// block object types. 4119void ASTContext::getObjCEncodingForMethodParameter(Decl::ObjCDeclQualifier QT, 4120 QualType T, std::string& S, 4121 bool Extended) const { 4122 // Encode type qualifer, 'in', 'inout', etc. for the parameter. 4123 getObjCEncodingForTypeQualifier(QT, S); 4124 // Encode parameter type. 4125 getObjCEncodingForTypeImpl(T, S, true, true, 0, 4126 true /*OutermostType*/, 4127 false /*EncodingProperty*/, 4128 false /*StructField*/, 4129 Extended /*EncodeBlockParameters*/, 4130 Extended /*EncodeClassNames*/); 4131} 4132 4133/// getObjCEncodingForMethodDecl - Return the encoded type for this method 4134/// declaration. 4135bool ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, 4136 std::string& S, 4137 bool Extended) const { 4138 // FIXME: This is not very efficient. 4139 // Encode return type. 4140 getObjCEncodingForMethodParameter(Decl->getObjCDeclQualifier(), 4141 Decl->getResultType(), S, Extended); 4142 // Compute size of all parameters. 4143 // Start with computing size of a pointer in number of bytes. 4144 // FIXME: There might(should) be a better way of doing this computation! 4145 SourceLocation Loc; 4146 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 4147 // The first two arguments (self and _cmd) are pointers; account for 4148 // their size. 4149 CharUnits ParmOffset = 2 * PtrSize; 4150 for (ObjCMethodDecl::param_const_iterator PI = Decl->param_begin(), 4151 E = Decl->sel_param_end(); PI != E; ++PI) { 4152 QualType PType = (*PI)->getType(); 4153 CharUnits sz = getObjCEncodingTypeSize(PType); 4154 if (sz.isZero()) 4155 return true; 4156 4157 assert (sz.isPositive() && 4158 "getObjCEncodingForMethodDecl - Incomplete param type"); 4159 ParmOffset += sz; 4160 } 4161 S += charUnitsToString(ParmOffset); 4162 S += "@0:"; 4163 S += charUnitsToString(PtrSize); 4164 4165 // Argument types. 4166 ParmOffset = 2 * PtrSize; 4167 for (ObjCMethodDecl::param_const_iterator PI = Decl->param_begin(), 4168 E = Decl->sel_param_end(); PI != E; ++PI) { 4169 const ParmVarDecl *PVDecl = *PI; 4170 QualType PType = PVDecl->getOriginalType(); 4171 if (const ArrayType *AT = 4172 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 4173 // Use array's original type only if it has known number of 4174 // elements. 4175 if (!isa<ConstantArrayType>(AT)) 4176 PType = PVDecl->getType(); 4177 } else if (PType->isFunctionType()) 4178 PType = PVDecl->getType(); 4179 getObjCEncodingForMethodParameter(PVDecl->getObjCDeclQualifier(), 4180 PType, S, Extended); 4181 S += charUnitsToString(ParmOffset); 4182 ParmOffset += getObjCEncodingTypeSize(PType); 4183 } 4184 4185 return false; 4186} 4187 4188/// getObjCEncodingForPropertyDecl - Return the encoded type for this 4189/// property declaration. If non-NULL, Container must be either an 4190/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be 4191/// NULL when getting encodings for protocol properties. 4192/// Property attributes are stored as a comma-delimited C string. The simple 4193/// attributes readonly and bycopy are encoded as single characters. The 4194/// parametrized attributes, getter=name, setter=name, and ivar=name, are 4195/// encoded as single characters, followed by an identifier. Property types 4196/// are also encoded as a parametrized attribute. The characters used to encode 4197/// these attributes are defined by the following enumeration: 4198/// @code 4199/// enum PropertyAttributes { 4200/// kPropertyReadOnly = 'R', // property is read-only. 4201/// kPropertyBycopy = 'C', // property is a copy of the value last assigned 4202/// kPropertyByref = '&', // property is a reference to the value last assigned 4203/// kPropertyDynamic = 'D', // property is dynamic 4204/// kPropertyGetter = 'G', // followed by getter selector name 4205/// kPropertySetter = 'S', // followed by setter selector name 4206/// kPropertyInstanceVariable = 'V' // followed by instance variable name 4207/// kPropertyType = 't' // followed by old-style type encoding. 4208/// kPropertyWeak = 'W' // 'weak' property 4209/// kPropertyStrong = 'P' // property GC'able 4210/// kPropertyNonAtomic = 'N' // property non-atomic 4211/// }; 4212/// @endcode 4213void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 4214 const Decl *Container, 4215 std::string& S) const { 4216 // Collect information from the property implementation decl(s). 4217 bool Dynamic = false; 4218 ObjCPropertyImplDecl *SynthesizePID = 0; 4219 4220 // FIXME: Duplicated code due to poor abstraction. 4221 if (Container) { 4222 if (const ObjCCategoryImplDecl *CID = 4223 dyn_cast<ObjCCategoryImplDecl>(Container)) { 4224 for (ObjCCategoryImplDecl::propimpl_iterator 4225 i = CID->propimpl_begin(), e = CID->propimpl_end(); 4226 i != e; ++i) { 4227 ObjCPropertyImplDecl *PID = *i; 4228 if (PID->getPropertyDecl() == PD) { 4229 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 4230 Dynamic = true; 4231 } else { 4232 SynthesizePID = PID; 4233 } 4234 } 4235 } 4236 } else { 4237 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container); 4238 for (ObjCCategoryImplDecl::propimpl_iterator 4239 i = OID->propimpl_begin(), e = OID->propimpl_end(); 4240 i != e; ++i) { 4241 ObjCPropertyImplDecl *PID = *i; 4242 if (PID->getPropertyDecl() == PD) { 4243 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 4244 Dynamic = true; 4245 } else { 4246 SynthesizePID = PID; 4247 } 4248 } 4249 } 4250 } 4251 } 4252 4253 // FIXME: This is not very efficient. 4254 S = "T"; 4255 4256 // Encode result type. 4257 // GCC has some special rules regarding encoding of properties which 4258 // closely resembles encoding of ivars. 4259 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, 0, 4260 true /* outermost type */, 4261 true /* encoding for property */); 4262 4263 if (PD->isReadOnly()) { 4264 S += ",R"; 4265 } else { 4266 switch (PD->getSetterKind()) { 4267 case ObjCPropertyDecl::Assign: break; 4268 case ObjCPropertyDecl::Copy: S += ",C"; break; 4269 case ObjCPropertyDecl::Retain: S += ",&"; break; 4270 case ObjCPropertyDecl::Weak: S += ",W"; break; 4271 } 4272 } 4273 4274 // It really isn't clear at all what this means, since properties 4275 // are "dynamic by default". 4276 if (Dynamic) 4277 S += ",D"; 4278 4279 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) 4280 S += ",N"; 4281 4282 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) { 4283 S += ",G"; 4284 S += PD->getGetterName().getAsString(); 4285 } 4286 4287 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) { 4288 S += ",S"; 4289 S += PD->getSetterName().getAsString(); 4290 } 4291 4292 if (SynthesizePID) { 4293 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl(); 4294 S += ",V"; 4295 S += OID->getNameAsString(); 4296 } 4297 4298 // FIXME: OBJCGC: weak & strong 4299} 4300 4301/// getLegacyIntegralTypeEncoding - 4302/// Another legacy compatibility encoding: 32-bit longs are encoded as 4303/// 'l' or 'L' , but not always. For typedefs, we need to use 4304/// 'i' or 'I' instead if encoding a struct field, or a pointer! 4305/// 4306void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const { 4307 if (isa<TypedefType>(PointeeTy.getTypePtr())) { 4308 if (const BuiltinType *BT = PointeeTy->getAs<BuiltinType>()) { 4309 if (BT->getKind() == BuiltinType::ULong && getIntWidth(PointeeTy) == 32) 4310 PointeeTy = UnsignedIntTy; 4311 else 4312 if (BT->getKind() == BuiltinType::Long && getIntWidth(PointeeTy) == 32) 4313 PointeeTy = IntTy; 4314 } 4315 } 4316} 4317 4318void ASTContext::getObjCEncodingForType(QualType T, std::string& S, 4319 const FieldDecl *Field) const { 4320 // We follow the behavior of gcc, expanding structures which are 4321 // directly pointed to, and expanding embedded structures. Note that 4322 // these rules are sufficient to prevent recursive encoding of the 4323 // same type. 4324 getObjCEncodingForTypeImpl(T, S, true, true, Field, 4325 true /* outermost type */); 4326} 4327 4328static char ObjCEncodingForPrimitiveKind(const ASTContext *C, QualType T) { 4329 switch (T->getAs<BuiltinType>()->getKind()) { 4330 default: llvm_unreachable("Unhandled builtin type kind"); 4331 case BuiltinType::Void: return 'v'; 4332 case BuiltinType::Bool: return 'B'; 4333 case BuiltinType::Char_U: 4334 case BuiltinType::UChar: return 'C'; 4335 case BuiltinType::UShort: return 'S'; 4336 case BuiltinType::UInt: return 'I'; 4337 case BuiltinType::ULong: 4338 return C->getIntWidth(T) == 32 ? 'L' : 'Q'; 4339 case BuiltinType::UInt128: return 'T'; 4340 case BuiltinType::ULongLong: return 'Q'; 4341 case BuiltinType::Char_S: 4342 case BuiltinType::SChar: return 'c'; 4343 case BuiltinType::Short: return 's'; 4344 case BuiltinType::WChar_S: 4345 case BuiltinType::WChar_U: 4346 case BuiltinType::Int: return 'i'; 4347 case BuiltinType::Long: 4348 return C->getIntWidth(T) == 32 ? 'l' : 'q'; 4349 case BuiltinType::LongLong: return 'q'; 4350 case BuiltinType::Int128: return 't'; 4351 case BuiltinType::Float: return 'f'; 4352 case BuiltinType::Double: return 'd'; 4353 case BuiltinType::LongDouble: return 'D'; 4354 } 4355} 4356 4357static char ObjCEncodingForEnumType(const ASTContext *C, const EnumType *ET) { 4358 EnumDecl *Enum = ET->getDecl(); 4359 4360 // The encoding of an non-fixed enum type is always 'i', regardless of size. 4361 if (!Enum->isFixed()) 4362 return 'i'; 4363 4364 // The encoding of a fixed enum type matches its fixed underlying type. 4365 return ObjCEncodingForPrimitiveKind(C, Enum->getIntegerType()); 4366} 4367 4368static void EncodeBitField(const ASTContext *Ctx, std::string& S, 4369 QualType T, const FieldDecl *FD) { 4370 assert(FD->isBitField() && "not a bitfield - getObjCEncodingForTypeImpl"); 4371 S += 'b'; 4372 // The NeXT runtime encodes bit fields as b followed by the number of bits. 4373 // The GNU runtime requires more information; bitfields are encoded as b, 4374 // then the offset (in bits) of the first element, then the type of the 4375 // bitfield, then the size in bits. For example, in this structure: 4376 // 4377 // struct 4378 // { 4379 // int integer; 4380 // int flags:2; 4381 // }; 4382 // On a 32-bit system, the encoding for flags would be b2 for the NeXT 4383 // runtime, but b32i2 for the GNU runtime. The reason for this extra 4384 // information is not especially sensible, but we're stuck with it for 4385 // compatibility with GCC, although providing it breaks anything that 4386 // actually uses runtime introspection and wants to work on both runtimes... 4387 if (!Ctx->getLangOptions().NeXTRuntime) { 4388 const RecordDecl *RD = FD->getParent(); 4389 const ASTRecordLayout &RL = Ctx->getASTRecordLayout(RD); 4390 S += llvm::utostr(RL.getFieldOffset(FD->getFieldIndex())); 4391 if (const EnumType *ET = T->getAs<EnumType>()) 4392 S += ObjCEncodingForEnumType(Ctx, ET); 4393 else 4394 S += ObjCEncodingForPrimitiveKind(Ctx, T); 4395 } 4396 S += llvm::utostr(FD->getBitWidthValue(*Ctx)); 4397} 4398 4399// FIXME: Use SmallString for accumulating string. 4400void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S, 4401 bool ExpandPointedToStructures, 4402 bool ExpandStructures, 4403 const FieldDecl *FD, 4404 bool OutermostType, 4405 bool EncodingProperty, 4406 bool StructField, 4407 bool EncodeBlockParameters, 4408 bool EncodeClassNames) const { 4409 if (T->getAs<BuiltinType>()) { 4410 if (FD && FD->isBitField()) 4411 return EncodeBitField(this, S, T, FD); 4412 S += ObjCEncodingForPrimitiveKind(this, T); 4413 return; 4414 } 4415 4416 if (const ComplexType *CT = T->getAs<ComplexType>()) { 4417 S += 'j'; 4418 getObjCEncodingForTypeImpl(CT->getElementType(), S, false, false, 0, false, 4419 false); 4420 return; 4421 } 4422 4423 // encoding for pointer or r3eference types. 4424 QualType PointeeTy; 4425 if (const PointerType *PT = T->getAs<PointerType>()) { 4426 if (PT->isObjCSelType()) { 4427 S += ':'; 4428 return; 4429 } 4430 PointeeTy = PT->getPointeeType(); 4431 } 4432 else if (const ReferenceType *RT = T->getAs<ReferenceType>()) 4433 PointeeTy = RT->getPointeeType(); 4434 if (!PointeeTy.isNull()) { 4435 bool isReadOnly = false; 4436 // For historical/compatibility reasons, the read-only qualifier of the 4437 // pointee gets emitted _before_ the '^'. The read-only qualifier of 4438 // the pointer itself gets ignored, _unless_ we are looking at a typedef! 4439 // Also, do not emit the 'r' for anything but the outermost type! 4440 if (isa<TypedefType>(T.getTypePtr())) { 4441 if (OutermostType && T.isConstQualified()) { 4442 isReadOnly = true; 4443 S += 'r'; 4444 } 4445 } else if (OutermostType) { 4446 QualType P = PointeeTy; 4447 while (P->getAs<PointerType>()) 4448 P = P->getAs<PointerType>()->getPointeeType(); 4449 if (P.isConstQualified()) { 4450 isReadOnly = true; 4451 S += 'r'; 4452 } 4453 } 4454 if (isReadOnly) { 4455 // Another legacy compatibility encoding. Some ObjC qualifier and type 4456 // combinations need to be rearranged. 4457 // Rewrite "in const" from "nr" to "rn" 4458 if (StringRef(S).endswith("nr")) 4459 S.replace(S.end()-2, S.end(), "rn"); 4460 } 4461 4462 if (PointeeTy->isCharType()) { 4463 // char pointer types should be encoded as '*' unless it is a 4464 // type that has been typedef'd to 'BOOL'. 4465 if (!isTypeTypedefedAsBOOL(PointeeTy)) { 4466 S += '*'; 4467 return; 4468 } 4469 } else if (const RecordType *RTy = PointeeTy->getAs<RecordType>()) { 4470 // GCC binary compat: Need to convert "struct objc_class *" to "#". 4471 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_class")) { 4472 S += '#'; 4473 return; 4474 } 4475 // GCC binary compat: Need to convert "struct objc_object *" to "@". 4476 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_object")) { 4477 S += '@'; 4478 return; 4479 } 4480 // fall through... 4481 } 4482 S += '^'; 4483 getLegacyIntegralTypeEncoding(PointeeTy); 4484 4485 getObjCEncodingForTypeImpl(PointeeTy, S, false, ExpandPointedToStructures, 4486 NULL); 4487 return; 4488 } 4489 4490 if (const ArrayType *AT = 4491 // Ignore type qualifiers etc. 4492 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) { 4493 if (isa<IncompleteArrayType>(AT) && !StructField) { 4494 // Incomplete arrays are encoded as a pointer to the array element. 4495 S += '^'; 4496 4497 getObjCEncodingForTypeImpl(AT->getElementType(), S, 4498 false, ExpandStructures, FD); 4499 } else { 4500 S += '['; 4501 4502 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) { 4503 if (getTypeSize(CAT->getElementType()) == 0) 4504 S += '0'; 4505 else 4506 S += llvm::utostr(CAT->getSize().getZExtValue()); 4507 } else { 4508 //Variable length arrays are encoded as a regular array with 0 elements. 4509 assert((isa<VariableArrayType>(AT) || isa<IncompleteArrayType>(AT)) && 4510 "Unknown array type!"); 4511 S += '0'; 4512 } 4513 4514 getObjCEncodingForTypeImpl(AT->getElementType(), S, 4515 false, ExpandStructures, FD); 4516 S += ']'; 4517 } 4518 return; 4519 } 4520 4521 if (T->getAs<FunctionType>()) { 4522 S += '?'; 4523 return; 4524 } 4525 4526 if (const RecordType *RTy = T->getAs<RecordType>()) { 4527 RecordDecl *RDecl = RTy->getDecl(); 4528 S += RDecl->isUnion() ? '(' : '{'; 4529 // Anonymous structures print as '?' 4530 if (const IdentifierInfo *II = RDecl->getIdentifier()) { 4531 S += II->getName(); 4532 if (ClassTemplateSpecializationDecl *Spec 4533 = dyn_cast<ClassTemplateSpecializationDecl>(RDecl)) { 4534 const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs(); 4535 std::string TemplateArgsStr 4536 = TemplateSpecializationType::PrintTemplateArgumentList( 4537 TemplateArgs.data(), 4538 TemplateArgs.size(), 4539 (*this).getPrintingPolicy()); 4540 4541 S += TemplateArgsStr; 4542 } 4543 } else { 4544 S += '?'; 4545 } 4546 if (ExpandStructures) { 4547 S += '='; 4548 if (!RDecl->isUnion()) { 4549 getObjCEncodingForStructureImpl(RDecl, S, FD); 4550 } else { 4551 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 4552 FieldEnd = RDecl->field_end(); 4553 Field != FieldEnd; ++Field) { 4554 if (FD) { 4555 S += '"'; 4556 S += Field->getNameAsString(); 4557 S += '"'; 4558 } 4559 4560 // Special case bit-fields. 4561 if (Field->isBitField()) { 4562 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, 4563 (*Field)); 4564 } else { 4565 QualType qt = Field->getType(); 4566 getLegacyIntegralTypeEncoding(qt); 4567 getObjCEncodingForTypeImpl(qt, S, false, true, 4568 FD, /*OutermostType*/false, 4569 /*EncodingProperty*/false, 4570 /*StructField*/true); 4571 } 4572 } 4573 } 4574 } 4575 S += RDecl->isUnion() ? ')' : '}'; 4576 return; 4577 } 4578 4579 if (const EnumType *ET = T->getAs<EnumType>()) { 4580 if (FD && FD->isBitField()) 4581 EncodeBitField(this, S, T, FD); 4582 else 4583 S += ObjCEncodingForEnumType(this, ET); 4584 return; 4585 } 4586 4587 if (const BlockPointerType *BT = T->getAs<BlockPointerType>()) { 4588 S += "@?"; // Unlike a pointer-to-function, which is "^?". 4589 if (EncodeBlockParameters) { 4590 const FunctionType *FT = BT->getPointeeType()->getAs<FunctionType>(); 4591 4592 S += '<'; 4593 // Block return type 4594 getObjCEncodingForTypeImpl(FT->getResultType(), S, 4595 ExpandPointedToStructures, ExpandStructures, 4596 FD, 4597 false /* OutermostType */, 4598 EncodingProperty, 4599 false /* StructField */, 4600 EncodeBlockParameters, 4601 EncodeClassNames); 4602 // Block self 4603 S += "@?"; 4604 // Block parameters 4605 if (const FunctionProtoType *FPT = dyn_cast<FunctionProtoType>(FT)) { 4606 for (FunctionProtoType::arg_type_iterator I = FPT->arg_type_begin(), 4607 E = FPT->arg_type_end(); I && (I != E); ++I) { 4608 getObjCEncodingForTypeImpl(*I, S, 4609 ExpandPointedToStructures, 4610 ExpandStructures, 4611 FD, 4612 false /* OutermostType */, 4613 EncodingProperty, 4614 false /* StructField */, 4615 EncodeBlockParameters, 4616 EncodeClassNames); 4617 } 4618 } 4619 S += '>'; 4620 } 4621 return; 4622 } 4623 4624 // Ignore protocol qualifiers when mangling at this level. 4625 if (const ObjCObjectType *OT = T->getAs<ObjCObjectType>()) 4626 T = OT->getBaseType(); 4627 4628 if (const ObjCInterfaceType *OIT = T->getAs<ObjCInterfaceType>()) { 4629 // @encode(class_name) 4630 ObjCInterfaceDecl *OI = OIT->getDecl(); 4631 S += '{'; 4632 const IdentifierInfo *II = OI->getIdentifier(); 4633 S += II->getName(); 4634 S += '='; 4635 SmallVector<const ObjCIvarDecl*, 32> Ivars; 4636 DeepCollectObjCIvars(OI, true, Ivars); 4637 for (unsigned i = 0, e = Ivars.size(); i != e; ++i) { 4638 const FieldDecl *Field = cast<FieldDecl>(Ivars[i]); 4639 if (Field->isBitField()) 4640 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, Field); 4641 else 4642 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, FD); 4643 } 4644 S += '}'; 4645 return; 4646 } 4647 4648 if (const ObjCObjectPointerType *OPT = T->getAs<ObjCObjectPointerType>()) { 4649 if (OPT->isObjCIdType()) { 4650 S += '@'; 4651 return; 4652 } 4653 4654 if (OPT->isObjCClassType() || OPT->isObjCQualifiedClassType()) { 4655 // FIXME: Consider if we need to output qualifiers for 'Class<p>'. 4656 // Since this is a binary compatibility issue, need to consult with runtime 4657 // folks. Fortunately, this is a *very* obsure construct. 4658 S += '#'; 4659 return; 4660 } 4661 4662 if (OPT->isObjCQualifiedIdType()) { 4663 getObjCEncodingForTypeImpl(getObjCIdType(), S, 4664 ExpandPointedToStructures, 4665 ExpandStructures, FD); 4666 if (FD || EncodingProperty || EncodeClassNames) { 4667 // Note that we do extended encoding of protocol qualifer list 4668 // Only when doing ivar or property encoding. 4669 S += '"'; 4670 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 4671 E = OPT->qual_end(); I != E; ++I) { 4672 S += '<'; 4673 S += (*I)->getNameAsString(); 4674 S += '>'; 4675 } 4676 S += '"'; 4677 } 4678 return; 4679 } 4680 4681 QualType PointeeTy = OPT->getPointeeType(); 4682 if (!EncodingProperty && 4683 isa<TypedefType>(PointeeTy.getTypePtr())) { 4684 // Another historical/compatibility reason. 4685 // We encode the underlying type which comes out as 4686 // {...}; 4687 S += '^'; 4688 getObjCEncodingForTypeImpl(PointeeTy, S, 4689 false, ExpandPointedToStructures, 4690 NULL); 4691 return; 4692 } 4693 4694 S += '@'; 4695 if (OPT->getInterfaceDecl() && 4696 (FD || EncodingProperty || EncodeClassNames)) { 4697 S += '"'; 4698 S += OPT->getInterfaceDecl()->getIdentifier()->getName(); 4699 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 4700 E = OPT->qual_end(); I != E; ++I) { 4701 S += '<'; 4702 S += (*I)->getNameAsString(); 4703 S += '>'; 4704 } 4705 S += '"'; 4706 } 4707 return; 4708 } 4709 4710 // gcc just blithely ignores member pointers. 4711 // TODO: maybe there should be a mangling for these 4712 if (T->getAs<MemberPointerType>()) 4713 return; 4714 4715 if (T->isVectorType()) { 4716 // This matches gcc's encoding, even though technically it is 4717 // insufficient. 4718 // FIXME. We should do a better job than gcc. 4719 return; 4720 } 4721 4722 llvm_unreachable("@encode for type not implemented!"); 4723} 4724 4725void ASTContext::getObjCEncodingForStructureImpl(RecordDecl *RDecl, 4726 std::string &S, 4727 const FieldDecl *FD, 4728 bool includeVBases) const { 4729 assert(RDecl && "Expected non-null RecordDecl"); 4730 assert(!RDecl->isUnion() && "Should not be called for unions"); 4731 if (!RDecl->getDefinition()) 4732 return; 4733 4734 CXXRecordDecl *CXXRec = dyn_cast<CXXRecordDecl>(RDecl); 4735 std::multimap<uint64_t, NamedDecl *> FieldOrBaseOffsets; 4736 const ASTRecordLayout &layout = getASTRecordLayout(RDecl); 4737 4738 if (CXXRec) { 4739 for (CXXRecordDecl::base_class_iterator 4740 BI = CXXRec->bases_begin(), 4741 BE = CXXRec->bases_end(); BI != BE; ++BI) { 4742 if (!BI->isVirtual()) { 4743 CXXRecordDecl *base = BI->getType()->getAsCXXRecordDecl(); 4744 if (base->isEmpty()) 4745 continue; 4746 uint64_t offs = layout.getBaseClassOffsetInBits(base); 4747 FieldOrBaseOffsets.insert(FieldOrBaseOffsets.upper_bound(offs), 4748 std::make_pair(offs, base)); 4749 } 4750 } 4751 } 4752 4753 unsigned i = 0; 4754 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 4755 FieldEnd = RDecl->field_end(); 4756 Field != FieldEnd; ++Field, ++i) { 4757 uint64_t offs = layout.getFieldOffset(i); 4758 FieldOrBaseOffsets.insert(FieldOrBaseOffsets.upper_bound(offs), 4759 std::make_pair(offs, *Field)); 4760 } 4761 4762 if (CXXRec && includeVBases) { 4763 for (CXXRecordDecl::base_class_iterator 4764 BI = CXXRec->vbases_begin(), 4765 BE = CXXRec->vbases_end(); BI != BE; ++BI) { 4766 CXXRecordDecl *base = BI->getType()->getAsCXXRecordDecl(); 4767 if (base->isEmpty()) 4768 continue; 4769 uint64_t offs = layout.getVBaseClassOffsetInBits(base); 4770 if (FieldOrBaseOffsets.find(offs) == FieldOrBaseOffsets.end()) 4771 FieldOrBaseOffsets.insert(FieldOrBaseOffsets.end(), 4772 std::make_pair(offs, base)); 4773 } 4774 } 4775 4776 CharUnits size; 4777 if (CXXRec) { 4778 size = includeVBases ? layout.getSize() : layout.getNonVirtualSize(); 4779 } else { 4780 size = layout.getSize(); 4781 } 4782 4783 uint64_t CurOffs = 0; 4784 std::multimap<uint64_t, NamedDecl *>::iterator 4785 CurLayObj = FieldOrBaseOffsets.begin(); 4786 4787 if ((CurLayObj != FieldOrBaseOffsets.end() && CurLayObj->first != 0) || 4788 (CurLayObj == FieldOrBaseOffsets.end() && 4789 CXXRec && CXXRec->isDynamicClass())) { 4790 assert(CXXRec && CXXRec->isDynamicClass() && 4791 "Offset 0 was empty but no VTable ?"); 4792 if (FD) { 4793 S += "\"_vptr$"; 4794 std::string recname = CXXRec->getNameAsString(); 4795 if (recname.empty()) recname = "?"; 4796 S += recname; 4797 S += '"'; 4798 } 4799 S += "^^?"; 4800 CurOffs += getTypeSize(VoidPtrTy); 4801 } 4802 4803 if (!RDecl->hasFlexibleArrayMember()) { 4804 // Mark the end of the structure. 4805 uint64_t offs = toBits(size); 4806 FieldOrBaseOffsets.insert(FieldOrBaseOffsets.upper_bound(offs), 4807 std::make_pair(offs, (NamedDecl*)0)); 4808 } 4809 4810 for (; CurLayObj != FieldOrBaseOffsets.end(); ++CurLayObj) { 4811 assert(CurOffs <= CurLayObj->first); 4812 4813 if (CurOffs < CurLayObj->first) { 4814 uint64_t padding = CurLayObj->first - CurOffs; 4815 // FIXME: There doesn't seem to be a way to indicate in the encoding that 4816 // packing/alignment of members is different that normal, in which case 4817 // the encoding will be out-of-sync with the real layout. 4818 // If the runtime switches to just consider the size of types without 4819 // taking into account alignment, we could make padding explicit in the 4820 // encoding (e.g. using arrays of chars). The encoding strings would be 4821 // longer then though. 4822 CurOffs += padding; 4823 } 4824 4825 NamedDecl *dcl = CurLayObj->second; 4826 if (dcl == 0) 4827 break; // reached end of structure. 4828 4829 if (CXXRecordDecl *base = dyn_cast<CXXRecordDecl>(dcl)) { 4830 // We expand the bases without their virtual bases since those are going 4831 // in the initial structure. Note that this differs from gcc which 4832 // expands virtual bases each time one is encountered in the hierarchy, 4833 // making the encoding type bigger than it really is. 4834 getObjCEncodingForStructureImpl(base, S, FD, /*includeVBases*/false); 4835 assert(!base->isEmpty()); 4836 CurOffs += toBits(getASTRecordLayout(base).getNonVirtualSize()); 4837 } else { 4838 FieldDecl *field = cast<FieldDecl>(dcl); 4839 if (FD) { 4840 S += '"'; 4841 S += field->getNameAsString(); 4842 S += '"'; 4843 } 4844 4845 if (field->isBitField()) { 4846 EncodeBitField(this, S, field->getType(), field); 4847 CurOffs += field->getBitWidthValue(*this); 4848 } else { 4849 QualType qt = field->getType(); 4850 getLegacyIntegralTypeEncoding(qt); 4851 getObjCEncodingForTypeImpl(qt, S, false, true, FD, 4852 /*OutermostType*/false, 4853 /*EncodingProperty*/false, 4854 /*StructField*/true); 4855 CurOffs += getTypeSize(field->getType()); 4856 } 4857 } 4858 } 4859} 4860 4861void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 4862 std::string& S) const { 4863 if (QT & Decl::OBJC_TQ_In) 4864 S += 'n'; 4865 if (QT & Decl::OBJC_TQ_Inout) 4866 S += 'N'; 4867 if (QT & Decl::OBJC_TQ_Out) 4868 S += 'o'; 4869 if (QT & Decl::OBJC_TQ_Bycopy) 4870 S += 'O'; 4871 if (QT & Decl::OBJC_TQ_Byref) 4872 S += 'R'; 4873 if (QT & Decl::OBJC_TQ_Oneway) 4874 S += 'V'; 4875} 4876 4877void ASTContext::setBuiltinVaListType(QualType T) { 4878 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!"); 4879 4880 BuiltinVaListType = T; 4881} 4882 4883TypedefDecl *ASTContext::getObjCIdDecl() const { 4884 if (!ObjCIdDecl) { 4885 QualType T = getObjCObjectType(ObjCBuiltinIdTy, 0, 0); 4886 T = getObjCObjectPointerType(T); 4887 TypeSourceInfo *IdInfo = getTrivialTypeSourceInfo(T); 4888 ObjCIdDecl = TypedefDecl::Create(const_cast<ASTContext &>(*this), 4889 getTranslationUnitDecl(), 4890 SourceLocation(), SourceLocation(), 4891 &Idents.get("id"), IdInfo); 4892 } 4893 4894 return ObjCIdDecl; 4895} 4896 4897TypedefDecl *ASTContext::getObjCSelDecl() const { 4898 if (!ObjCSelDecl) { 4899 QualType SelT = getPointerType(ObjCBuiltinSelTy); 4900 TypeSourceInfo *SelInfo = getTrivialTypeSourceInfo(SelT); 4901 ObjCSelDecl = TypedefDecl::Create(const_cast<ASTContext &>(*this), 4902 getTranslationUnitDecl(), 4903 SourceLocation(), SourceLocation(), 4904 &Idents.get("SEL"), SelInfo); 4905 } 4906 return ObjCSelDecl; 4907} 4908 4909TypedefDecl *ASTContext::getObjCClassDecl() const { 4910 if (!ObjCClassDecl) { 4911 QualType T = getObjCObjectType(ObjCBuiltinClassTy, 0, 0); 4912 T = getObjCObjectPointerType(T); 4913 TypeSourceInfo *ClassInfo = getTrivialTypeSourceInfo(T); 4914 ObjCClassDecl = TypedefDecl::Create(const_cast<ASTContext &>(*this), 4915 getTranslationUnitDecl(), 4916 SourceLocation(), SourceLocation(), 4917 &Idents.get("Class"), ClassInfo); 4918 } 4919 4920 return ObjCClassDecl; 4921} 4922 4923ObjCInterfaceDecl *ASTContext::getObjCProtocolDecl() const { 4924 if (!ObjCProtocolClassDecl) { 4925 ObjCProtocolClassDecl 4926 = ObjCInterfaceDecl::Create(*this, getTranslationUnitDecl(), 4927 SourceLocation(), 4928 &Idents.get("Protocol"), 4929 /*PrevDecl=*/0, 4930 SourceLocation(), true); 4931 } 4932 4933 return ObjCProtocolClassDecl; 4934} 4935 4936void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) { 4937 assert(ObjCConstantStringType.isNull() && 4938 "'NSConstantString' type already set!"); 4939 4940 ObjCConstantStringType = getObjCInterfaceType(Decl); 4941} 4942 4943/// \brief Retrieve the template name that corresponds to a non-empty 4944/// lookup. 4945TemplateName 4946ASTContext::getOverloadedTemplateName(UnresolvedSetIterator Begin, 4947 UnresolvedSetIterator End) const { 4948 unsigned size = End - Begin; 4949 assert(size > 1 && "set is not overloaded!"); 4950 4951 void *memory = Allocate(sizeof(OverloadedTemplateStorage) + 4952 size * sizeof(FunctionTemplateDecl*)); 4953 OverloadedTemplateStorage *OT = new(memory) OverloadedTemplateStorage(size); 4954 4955 NamedDecl **Storage = OT->getStorage(); 4956 for (UnresolvedSetIterator I = Begin; I != End; ++I) { 4957 NamedDecl *D = *I; 4958 assert(isa<FunctionTemplateDecl>(D) || 4959 (isa<UsingShadowDecl>(D) && 4960 isa<FunctionTemplateDecl>(D->getUnderlyingDecl()))); 4961 *Storage++ = D; 4962 } 4963 4964 return TemplateName(OT); 4965} 4966 4967/// \brief Retrieve the template name that represents a qualified 4968/// template name such as \c std::vector. 4969TemplateName 4970ASTContext::getQualifiedTemplateName(NestedNameSpecifier *NNS, 4971 bool TemplateKeyword, 4972 TemplateDecl *Template) const { 4973 assert(NNS && "Missing nested-name-specifier in qualified template name"); 4974 4975 // FIXME: Canonicalization? 4976 llvm::FoldingSetNodeID ID; 4977 QualifiedTemplateName::Profile(ID, NNS, TemplateKeyword, Template); 4978 4979 void *InsertPos = 0; 4980 QualifiedTemplateName *QTN = 4981 QualifiedTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4982 if (!QTN) { 4983 QTN = new (*this,4) QualifiedTemplateName(NNS, TemplateKeyword, Template); 4984 QualifiedTemplateNames.InsertNode(QTN, InsertPos); 4985 } 4986 4987 return TemplateName(QTN); 4988} 4989 4990/// \brief Retrieve the template name that represents a dependent 4991/// template name such as \c MetaFun::template apply. 4992TemplateName 4993ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 4994 const IdentifierInfo *Name) const { 4995 assert((!NNS || NNS->isDependent()) && 4996 "Nested name specifier must be dependent"); 4997 4998 llvm::FoldingSetNodeID ID; 4999 DependentTemplateName::Profile(ID, NNS, Name); 5000 5001 void *InsertPos = 0; 5002 DependentTemplateName *QTN = 5003 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 5004 5005 if (QTN) 5006 return TemplateName(QTN); 5007 5008 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 5009 if (CanonNNS == NNS) { 5010 QTN = new (*this,4) DependentTemplateName(NNS, Name); 5011 } else { 5012 TemplateName Canon = getDependentTemplateName(CanonNNS, Name); 5013 QTN = new (*this,4) DependentTemplateName(NNS, Name, Canon); 5014 DependentTemplateName *CheckQTN = 5015 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 5016 assert(!CheckQTN && "Dependent type name canonicalization broken"); 5017 (void)CheckQTN; 5018 } 5019 5020 DependentTemplateNames.InsertNode(QTN, InsertPos); 5021 return TemplateName(QTN); 5022} 5023 5024/// \brief Retrieve the template name that represents a dependent 5025/// template name such as \c MetaFun::template operator+. 5026TemplateName 5027ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 5028 OverloadedOperatorKind Operator) const { 5029 assert((!NNS || NNS->isDependent()) && 5030 "Nested name specifier must be dependent"); 5031 5032 llvm::FoldingSetNodeID ID; 5033 DependentTemplateName::Profile(ID, NNS, Operator); 5034 5035 void *InsertPos = 0; 5036 DependentTemplateName *QTN 5037 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 5038 5039 if (QTN) 5040 return TemplateName(QTN); 5041 5042 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 5043 if (CanonNNS == NNS) { 5044 QTN = new (*this,4) DependentTemplateName(NNS, Operator); 5045 } else { 5046 TemplateName Canon = getDependentTemplateName(CanonNNS, Operator); 5047 QTN = new (*this,4) DependentTemplateName(NNS, Operator, Canon); 5048 5049 DependentTemplateName *CheckQTN 5050 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 5051 assert(!CheckQTN && "Dependent template name canonicalization broken"); 5052 (void)CheckQTN; 5053 } 5054 5055 DependentTemplateNames.InsertNode(QTN, InsertPos); 5056 return TemplateName(QTN); 5057} 5058 5059TemplateName 5060ASTContext::getSubstTemplateTemplateParm(TemplateTemplateParmDecl *param, 5061 TemplateName replacement) const { 5062 llvm::FoldingSetNodeID ID; 5063 SubstTemplateTemplateParmStorage::Profile(ID, param, replacement); 5064 5065 void *insertPos = 0; 5066 SubstTemplateTemplateParmStorage *subst 5067 = SubstTemplateTemplateParms.FindNodeOrInsertPos(ID, insertPos); 5068 5069 if (!subst) { 5070 subst = new (*this) SubstTemplateTemplateParmStorage(param, replacement); 5071 SubstTemplateTemplateParms.InsertNode(subst, insertPos); 5072 } 5073 5074 return TemplateName(subst); 5075} 5076 5077TemplateName 5078ASTContext::getSubstTemplateTemplateParmPack(TemplateTemplateParmDecl *Param, 5079 const TemplateArgument &ArgPack) const { 5080 ASTContext &Self = const_cast<ASTContext &>(*this); 5081 llvm::FoldingSetNodeID ID; 5082 SubstTemplateTemplateParmPackStorage::Profile(ID, Self, Param, ArgPack); 5083 5084 void *InsertPos = 0; 5085 SubstTemplateTemplateParmPackStorage *Subst 5086 = SubstTemplateTemplateParmPacks.FindNodeOrInsertPos(ID, InsertPos); 5087 5088 if (!Subst) { 5089 Subst = new (*this) SubstTemplateTemplateParmPackStorage(Param, 5090 ArgPack.pack_size(), 5091 ArgPack.pack_begin()); 5092 SubstTemplateTemplateParmPacks.InsertNode(Subst, InsertPos); 5093 } 5094 5095 return TemplateName(Subst); 5096} 5097 5098/// getFromTargetType - Given one of the integer types provided by 5099/// TargetInfo, produce the corresponding type. The unsigned @p Type 5100/// is actually a value of type @c TargetInfo::IntType. 5101CanQualType ASTContext::getFromTargetType(unsigned Type) const { 5102 switch (Type) { 5103 case TargetInfo::NoInt: return CanQualType(); 5104 case TargetInfo::SignedShort: return ShortTy; 5105 case TargetInfo::UnsignedShort: return UnsignedShortTy; 5106 case TargetInfo::SignedInt: return IntTy; 5107 case TargetInfo::UnsignedInt: return UnsignedIntTy; 5108 case TargetInfo::SignedLong: return LongTy; 5109 case TargetInfo::UnsignedLong: return UnsignedLongTy; 5110 case TargetInfo::SignedLongLong: return LongLongTy; 5111 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy; 5112 } 5113 5114 llvm_unreachable("Unhandled TargetInfo::IntType value"); 5115} 5116 5117//===----------------------------------------------------------------------===// 5118// Type Predicates. 5119//===----------------------------------------------------------------------===// 5120 5121/// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 5122/// garbage collection attribute. 5123/// 5124Qualifiers::GC ASTContext::getObjCGCAttrKind(QualType Ty) const { 5125 if (getLangOptions().getGC() == LangOptions::NonGC) 5126 return Qualifiers::GCNone; 5127 5128 assert(getLangOptions().ObjC1); 5129 Qualifiers::GC GCAttrs = Ty.getObjCGCAttr(); 5130 5131 // Default behaviour under objective-C's gc is for ObjC pointers 5132 // (or pointers to them) be treated as though they were declared 5133 // as __strong. 5134 if (GCAttrs == Qualifiers::GCNone) { 5135 if (Ty->isObjCObjectPointerType() || Ty->isBlockPointerType()) 5136 return Qualifiers::Strong; 5137 else if (Ty->isPointerType()) 5138 return getObjCGCAttrKind(Ty->getAs<PointerType>()->getPointeeType()); 5139 } else { 5140 // It's not valid to set GC attributes on anything that isn't a 5141 // pointer. 5142#ifndef NDEBUG 5143 QualType CT = Ty->getCanonicalTypeInternal(); 5144 while (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 5145 CT = AT->getElementType(); 5146 assert(CT->isAnyPointerType() || CT->isBlockPointerType()); 5147#endif 5148 } 5149 return GCAttrs; 5150} 5151 5152//===----------------------------------------------------------------------===// 5153// Type Compatibility Testing 5154//===----------------------------------------------------------------------===// 5155 5156/// areCompatVectorTypes - Return true if the two specified vector types are 5157/// compatible. 5158static bool areCompatVectorTypes(const VectorType *LHS, 5159 const VectorType *RHS) { 5160 assert(LHS->isCanonicalUnqualified() && RHS->isCanonicalUnqualified()); 5161 return LHS->getElementType() == RHS->getElementType() && 5162 LHS->getNumElements() == RHS->getNumElements(); 5163} 5164 5165bool ASTContext::areCompatibleVectorTypes(QualType FirstVec, 5166 QualType SecondVec) { 5167 assert(FirstVec->isVectorType() && "FirstVec should be a vector type"); 5168 assert(SecondVec->isVectorType() && "SecondVec should be a vector type"); 5169 5170 if (hasSameUnqualifiedType(FirstVec, SecondVec)) 5171 return true; 5172 5173 // Treat Neon vector types and most AltiVec vector types as if they are the 5174 // equivalent GCC vector types. 5175 const VectorType *First = FirstVec->getAs<VectorType>(); 5176 const VectorType *Second = SecondVec->getAs<VectorType>(); 5177 if (First->getNumElements() == Second->getNumElements() && 5178 hasSameType(First->getElementType(), Second->getElementType()) && 5179 First->getVectorKind() != VectorType::AltiVecPixel && 5180 First->getVectorKind() != VectorType::AltiVecBool && 5181 Second->getVectorKind() != VectorType::AltiVecPixel && 5182 Second->getVectorKind() != VectorType::AltiVecBool) 5183 return true; 5184 5185 return false; 5186} 5187 5188//===----------------------------------------------------------------------===// 5189// ObjCQualifiedIdTypesAreCompatible - Compatibility testing for qualified id's. 5190//===----------------------------------------------------------------------===// 5191 5192/// ProtocolCompatibleWithProtocol - return 'true' if 'lProto' is in the 5193/// inheritance hierarchy of 'rProto'. 5194bool 5195ASTContext::ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 5196 ObjCProtocolDecl *rProto) const { 5197 if (declaresSameEntity(lProto, rProto)) 5198 return true; 5199 for (ObjCProtocolDecl::protocol_iterator PI = rProto->protocol_begin(), 5200 E = rProto->protocol_end(); PI != E; ++PI) 5201 if (ProtocolCompatibleWithProtocol(lProto, *PI)) 5202 return true; 5203 return false; 5204} 5205 5206/// QualifiedIdConformsQualifiedId - compare id<p,...> with id<p1,...> 5207/// return true if lhs's protocols conform to rhs's protocol; false 5208/// otherwise. 5209bool ASTContext::QualifiedIdConformsQualifiedId(QualType lhs, QualType rhs) { 5210 if (lhs->isObjCQualifiedIdType() && rhs->isObjCQualifiedIdType()) 5211 return ObjCQualifiedIdTypesAreCompatible(lhs, rhs, false); 5212 return false; 5213} 5214 5215/// ObjCQualifiedClassTypesAreCompatible - compare Class<p,...> and 5216/// Class<p1, ...>. 5217bool ASTContext::ObjCQualifiedClassTypesAreCompatible(QualType lhs, 5218 QualType rhs) { 5219 const ObjCObjectPointerType *lhsQID = lhs->getAs<ObjCObjectPointerType>(); 5220 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 5221 assert ((lhsQID && rhsOPT) && "ObjCQualifiedClassTypesAreCompatible"); 5222 5223 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 5224 E = lhsQID->qual_end(); I != E; ++I) { 5225 bool match = false; 5226 ObjCProtocolDecl *lhsProto = *I; 5227 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 5228 E = rhsOPT->qual_end(); J != E; ++J) { 5229 ObjCProtocolDecl *rhsProto = *J; 5230 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto)) { 5231 match = true; 5232 break; 5233 } 5234 } 5235 if (!match) 5236 return false; 5237 } 5238 return true; 5239} 5240 5241/// ObjCQualifiedIdTypesAreCompatible - We know that one of lhs/rhs is an 5242/// ObjCQualifiedIDType. 5243bool ASTContext::ObjCQualifiedIdTypesAreCompatible(QualType lhs, QualType rhs, 5244 bool compare) { 5245 // Allow id<P..> and an 'id' or void* type in all cases. 5246 if (lhs->isVoidPointerType() || 5247 lhs->isObjCIdType() || lhs->isObjCClassType()) 5248 return true; 5249 else if (rhs->isVoidPointerType() || 5250 rhs->isObjCIdType() || rhs->isObjCClassType()) 5251 return true; 5252 5253 if (const ObjCObjectPointerType *lhsQID = lhs->getAsObjCQualifiedIdType()) { 5254 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 5255 5256 if (!rhsOPT) return false; 5257 5258 if (rhsOPT->qual_empty()) { 5259 // If the RHS is a unqualified interface pointer "NSString*", 5260 // make sure we check the class hierarchy. 5261 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 5262 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 5263 E = lhsQID->qual_end(); I != E; ++I) { 5264 // when comparing an id<P> on lhs with a static type on rhs, 5265 // see if static class implements all of id's protocols, directly or 5266 // through its super class and categories. 5267 if (!rhsID->ClassImplementsProtocol(*I, true)) 5268 return false; 5269 } 5270 } 5271 // If there are no qualifiers and no interface, we have an 'id'. 5272 return true; 5273 } 5274 // Both the right and left sides have qualifiers. 5275 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 5276 E = lhsQID->qual_end(); I != E; ++I) { 5277 ObjCProtocolDecl *lhsProto = *I; 5278 bool match = false; 5279 5280 // when comparing an id<P> on lhs with a static type on rhs, 5281 // see if static class implements all of id's protocols, directly or 5282 // through its super class and categories. 5283 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 5284 E = rhsOPT->qual_end(); J != E; ++J) { 5285 ObjCProtocolDecl *rhsProto = *J; 5286 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 5287 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 5288 match = true; 5289 break; 5290 } 5291 } 5292 // If the RHS is a qualified interface pointer "NSString<P>*", 5293 // make sure we check the class hierarchy. 5294 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 5295 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 5296 E = lhsQID->qual_end(); I != E; ++I) { 5297 // when comparing an id<P> on lhs with a static type on rhs, 5298 // see if static class implements all of id's protocols, directly or 5299 // through its super class and categories. 5300 if (rhsID->ClassImplementsProtocol(*I, true)) { 5301 match = true; 5302 break; 5303 } 5304 } 5305 } 5306 if (!match) 5307 return false; 5308 } 5309 5310 return true; 5311 } 5312 5313 const ObjCObjectPointerType *rhsQID = rhs->getAsObjCQualifiedIdType(); 5314 assert(rhsQID && "One of the LHS/RHS should be id<x>"); 5315 5316 if (const ObjCObjectPointerType *lhsOPT = 5317 lhs->getAsObjCInterfacePointerType()) { 5318 // If both the right and left sides have qualifiers. 5319 for (ObjCObjectPointerType::qual_iterator I = lhsOPT->qual_begin(), 5320 E = lhsOPT->qual_end(); I != E; ++I) { 5321 ObjCProtocolDecl *lhsProto = *I; 5322 bool match = false; 5323 5324 // when comparing an id<P> on rhs with a static type on lhs, 5325 // see if static class implements all of id's protocols, directly or 5326 // through its super class and categories. 5327 // First, lhs protocols in the qualifier list must be found, direct 5328 // or indirect in rhs's qualifier list or it is a mismatch. 5329 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 5330 E = rhsQID->qual_end(); J != E; ++J) { 5331 ObjCProtocolDecl *rhsProto = *J; 5332 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 5333 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 5334 match = true; 5335 break; 5336 } 5337 } 5338 if (!match) 5339 return false; 5340 } 5341 5342 // Static class's protocols, or its super class or category protocols 5343 // must be found, direct or indirect in rhs's qualifier list or it is a mismatch. 5344 if (ObjCInterfaceDecl *lhsID = lhsOPT->getInterfaceDecl()) { 5345 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 5346 CollectInheritedProtocols(lhsID, LHSInheritedProtocols); 5347 // This is rather dubious but matches gcc's behavior. If lhs has 5348 // no type qualifier and its class has no static protocol(s) 5349 // assume that it is mismatch. 5350 if (LHSInheritedProtocols.empty() && lhsOPT->qual_empty()) 5351 return false; 5352 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 5353 LHSInheritedProtocols.begin(), 5354 E = LHSInheritedProtocols.end(); I != E; ++I) { 5355 bool match = false; 5356 ObjCProtocolDecl *lhsProto = (*I); 5357 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 5358 E = rhsQID->qual_end(); J != E; ++J) { 5359 ObjCProtocolDecl *rhsProto = *J; 5360 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 5361 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 5362 match = true; 5363 break; 5364 } 5365 } 5366 if (!match) 5367 return false; 5368 } 5369 } 5370 return true; 5371 } 5372 return false; 5373} 5374 5375/// canAssignObjCInterfaces - Return true if the two interface types are 5376/// compatible for assignment from RHS to LHS. This handles validation of any 5377/// protocol qualifiers on the LHS or RHS. 5378/// 5379bool ASTContext::canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 5380 const ObjCObjectPointerType *RHSOPT) { 5381 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 5382 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 5383 5384 // If either type represents the built-in 'id' or 'Class' types, return true. 5385 if (LHS->isObjCUnqualifiedIdOrClass() || 5386 RHS->isObjCUnqualifiedIdOrClass()) 5387 return true; 5388 5389 if (LHS->isObjCQualifiedId() || RHS->isObjCQualifiedId()) 5390 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 5391 QualType(RHSOPT,0), 5392 false); 5393 5394 if (LHS->isObjCQualifiedClass() && RHS->isObjCQualifiedClass()) 5395 return ObjCQualifiedClassTypesAreCompatible(QualType(LHSOPT,0), 5396 QualType(RHSOPT,0)); 5397 5398 // If we have 2 user-defined types, fall into that path. 5399 if (LHS->getInterface() && RHS->getInterface()) 5400 return canAssignObjCInterfaces(LHS, RHS); 5401 5402 return false; 5403} 5404 5405/// canAssignObjCInterfacesInBlockPointer - This routine is specifically written 5406/// for providing type-safety for objective-c pointers used to pass/return 5407/// arguments in block literals. When passed as arguments, passing 'A*' where 5408/// 'id' is expected is not OK. Passing 'Sub *" where 'Super *" is expected is 5409/// not OK. For the return type, the opposite is not OK. 5410bool ASTContext::canAssignObjCInterfacesInBlockPointer( 5411 const ObjCObjectPointerType *LHSOPT, 5412 const ObjCObjectPointerType *RHSOPT, 5413 bool BlockReturnType) { 5414 if (RHSOPT->isObjCBuiltinType() || LHSOPT->isObjCIdType()) 5415 return true; 5416 5417 if (LHSOPT->isObjCBuiltinType()) { 5418 return RHSOPT->isObjCBuiltinType() || RHSOPT->isObjCQualifiedIdType(); 5419 } 5420 5421 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 5422 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 5423 QualType(RHSOPT,0), 5424 false); 5425 5426 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 5427 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 5428 if (LHS && RHS) { // We have 2 user-defined types. 5429 if (LHS != RHS) { 5430 if (LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 5431 return BlockReturnType; 5432 if (RHS->getDecl()->isSuperClassOf(LHS->getDecl())) 5433 return !BlockReturnType; 5434 } 5435 else 5436 return true; 5437 } 5438 return false; 5439} 5440 5441/// getIntersectionOfProtocols - This routine finds the intersection of set 5442/// of protocols inherited from two distinct objective-c pointer objects. 5443/// It is used to build composite qualifier list of the composite type of 5444/// the conditional expression involving two objective-c pointer objects. 5445static 5446void getIntersectionOfProtocols(ASTContext &Context, 5447 const ObjCObjectPointerType *LHSOPT, 5448 const ObjCObjectPointerType *RHSOPT, 5449 SmallVectorImpl<ObjCProtocolDecl *> &IntersectionOfProtocols) { 5450 5451 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 5452 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 5453 assert(LHS->getInterface() && "LHS must have an interface base"); 5454 assert(RHS->getInterface() && "RHS must have an interface base"); 5455 5456 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> InheritedProtocolSet; 5457 unsigned LHSNumProtocols = LHS->getNumProtocols(); 5458 if (LHSNumProtocols > 0) 5459 InheritedProtocolSet.insert(LHS->qual_begin(), LHS->qual_end()); 5460 else { 5461 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 5462 Context.CollectInheritedProtocols(LHS->getInterface(), 5463 LHSInheritedProtocols); 5464 InheritedProtocolSet.insert(LHSInheritedProtocols.begin(), 5465 LHSInheritedProtocols.end()); 5466 } 5467 5468 unsigned RHSNumProtocols = RHS->getNumProtocols(); 5469 if (RHSNumProtocols > 0) { 5470 ObjCProtocolDecl **RHSProtocols = 5471 const_cast<ObjCProtocolDecl **>(RHS->qual_begin()); 5472 for (unsigned i = 0; i < RHSNumProtocols; ++i) 5473 if (InheritedProtocolSet.count(RHSProtocols[i])) 5474 IntersectionOfProtocols.push_back(RHSProtocols[i]); 5475 } else { 5476 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> RHSInheritedProtocols; 5477 Context.CollectInheritedProtocols(RHS->getInterface(), 5478 RHSInheritedProtocols); 5479 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 5480 RHSInheritedProtocols.begin(), 5481 E = RHSInheritedProtocols.end(); I != E; ++I) 5482 if (InheritedProtocolSet.count((*I))) 5483 IntersectionOfProtocols.push_back((*I)); 5484 } 5485} 5486 5487/// areCommonBaseCompatible - Returns common base class of the two classes if 5488/// one found. Note that this is O'2 algorithm. But it will be called as the 5489/// last type comparison in a ?-exp of ObjC pointer types before a 5490/// warning is issued. So, its invokation is extremely rare. 5491QualType ASTContext::areCommonBaseCompatible( 5492 const ObjCObjectPointerType *Lptr, 5493 const ObjCObjectPointerType *Rptr) { 5494 const ObjCObjectType *LHS = Lptr->getObjectType(); 5495 const ObjCObjectType *RHS = Rptr->getObjectType(); 5496 const ObjCInterfaceDecl* LDecl = LHS->getInterface(); 5497 const ObjCInterfaceDecl* RDecl = RHS->getInterface(); 5498 if (!LDecl || !RDecl || (declaresSameEntity(LDecl, RDecl))) 5499 return QualType(); 5500 5501 do { 5502 LHS = cast<ObjCInterfaceType>(getObjCInterfaceType(LDecl)); 5503 if (canAssignObjCInterfaces(LHS, RHS)) { 5504 SmallVector<ObjCProtocolDecl *, 8> Protocols; 5505 getIntersectionOfProtocols(*this, Lptr, Rptr, Protocols); 5506 5507 QualType Result = QualType(LHS, 0); 5508 if (!Protocols.empty()) 5509 Result = getObjCObjectType(Result, Protocols.data(), Protocols.size()); 5510 Result = getObjCObjectPointerType(Result); 5511 return Result; 5512 } 5513 } while ((LDecl = LDecl->getSuperClass())); 5514 5515 return QualType(); 5516} 5517 5518bool ASTContext::canAssignObjCInterfaces(const ObjCObjectType *LHS, 5519 const ObjCObjectType *RHS) { 5520 assert(LHS->getInterface() && "LHS is not an interface type"); 5521 assert(RHS->getInterface() && "RHS is not an interface type"); 5522 5523 // Verify that the base decls are compatible: the RHS must be a subclass of 5524 // the LHS. 5525 if (!LHS->getInterface()->isSuperClassOf(RHS->getInterface())) 5526 return false; 5527 5528 // RHS must have a superset of the protocols in the LHS. If the LHS is not 5529 // protocol qualified at all, then we are good. 5530 if (LHS->getNumProtocols() == 0) 5531 return true; 5532 5533 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, 5534 // more detailed analysis is required. 5535 if (RHS->getNumProtocols() == 0) { 5536 // OK, if LHS is a superclass of RHS *and* 5537 // this superclass is assignment compatible with LHS. 5538 // false otherwise. 5539 bool IsSuperClass = 5540 LHS->getInterface()->isSuperClassOf(RHS->getInterface()); 5541 if (IsSuperClass) { 5542 // OK if conversion of LHS to SuperClass results in narrowing of types 5543 // ; i.e., SuperClass may implement at least one of the protocols 5544 // in LHS's protocol list. Example, SuperObj<P1> = lhs<P1,P2> is ok. 5545 // But not SuperObj<P1,P2,P3> = lhs<P1,P2>. 5546 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> SuperClassInheritedProtocols; 5547 CollectInheritedProtocols(RHS->getInterface(), SuperClassInheritedProtocols); 5548 // If super class has no protocols, it is not a match. 5549 if (SuperClassInheritedProtocols.empty()) 5550 return false; 5551 5552 for (ObjCObjectType::qual_iterator LHSPI = LHS->qual_begin(), 5553 LHSPE = LHS->qual_end(); 5554 LHSPI != LHSPE; LHSPI++) { 5555 bool SuperImplementsProtocol = false; 5556 ObjCProtocolDecl *LHSProto = (*LHSPI); 5557 5558 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 5559 SuperClassInheritedProtocols.begin(), 5560 E = SuperClassInheritedProtocols.end(); I != E; ++I) { 5561 ObjCProtocolDecl *SuperClassProto = (*I); 5562 if (SuperClassProto->lookupProtocolNamed(LHSProto->getIdentifier())) { 5563 SuperImplementsProtocol = true; 5564 break; 5565 } 5566 } 5567 if (!SuperImplementsProtocol) 5568 return false; 5569 } 5570 return true; 5571 } 5572 return false; 5573 } 5574 5575 for (ObjCObjectType::qual_iterator LHSPI = LHS->qual_begin(), 5576 LHSPE = LHS->qual_end(); 5577 LHSPI != LHSPE; LHSPI++) { 5578 bool RHSImplementsProtocol = false; 5579 5580 // If the RHS doesn't implement the protocol on the left, the types 5581 // are incompatible. 5582 for (ObjCObjectType::qual_iterator RHSPI = RHS->qual_begin(), 5583 RHSPE = RHS->qual_end(); 5584 RHSPI != RHSPE; RHSPI++) { 5585 if ((*RHSPI)->lookupProtocolNamed((*LHSPI)->getIdentifier())) { 5586 RHSImplementsProtocol = true; 5587 break; 5588 } 5589 } 5590 // FIXME: For better diagnostics, consider passing back the protocol name. 5591 if (!RHSImplementsProtocol) 5592 return false; 5593 } 5594 // The RHS implements all protocols listed on the LHS. 5595 return true; 5596} 5597 5598bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) { 5599 // get the "pointed to" types 5600 const ObjCObjectPointerType *LHSOPT = LHS->getAs<ObjCObjectPointerType>(); 5601 const ObjCObjectPointerType *RHSOPT = RHS->getAs<ObjCObjectPointerType>(); 5602 5603 if (!LHSOPT || !RHSOPT) 5604 return false; 5605 5606 return canAssignObjCInterfaces(LHSOPT, RHSOPT) || 5607 canAssignObjCInterfaces(RHSOPT, LHSOPT); 5608} 5609 5610bool ASTContext::canBindObjCObjectType(QualType To, QualType From) { 5611 return canAssignObjCInterfaces( 5612 getObjCObjectPointerType(To)->getAs<ObjCObjectPointerType>(), 5613 getObjCObjectPointerType(From)->getAs<ObjCObjectPointerType>()); 5614} 5615 5616/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible, 5617/// both shall have the identically qualified version of a compatible type. 5618/// C99 6.2.7p1: Two types have compatible types if their types are the 5619/// same. See 6.7.[2,3,5] for additional rules. 5620bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS, 5621 bool CompareUnqualified) { 5622 if (getLangOptions().CPlusPlus) 5623 return hasSameType(LHS, RHS); 5624 5625 return !mergeTypes(LHS, RHS, false, CompareUnqualified).isNull(); 5626} 5627 5628bool ASTContext::propertyTypesAreCompatible(QualType LHS, QualType RHS) { 5629 return typesAreCompatible(LHS, RHS); 5630} 5631 5632bool ASTContext::typesAreBlockPointerCompatible(QualType LHS, QualType RHS) { 5633 return !mergeTypes(LHS, RHS, true).isNull(); 5634} 5635 5636/// mergeTransparentUnionType - if T is a transparent union type and a member 5637/// of T is compatible with SubType, return the merged type, else return 5638/// QualType() 5639QualType ASTContext::mergeTransparentUnionType(QualType T, QualType SubType, 5640 bool OfBlockPointer, 5641 bool Unqualified) { 5642 if (const RecordType *UT = T->getAsUnionType()) { 5643 RecordDecl *UD = UT->getDecl(); 5644 if (UD->hasAttr<TransparentUnionAttr>()) { 5645 for (RecordDecl::field_iterator it = UD->field_begin(), 5646 itend = UD->field_end(); it != itend; ++it) { 5647 QualType ET = it->getType().getUnqualifiedType(); 5648 QualType MT = mergeTypes(ET, SubType, OfBlockPointer, Unqualified); 5649 if (!MT.isNull()) 5650 return MT; 5651 } 5652 } 5653 } 5654 5655 return QualType(); 5656} 5657 5658/// mergeFunctionArgumentTypes - merge two types which appear as function 5659/// argument types 5660QualType ASTContext::mergeFunctionArgumentTypes(QualType lhs, QualType rhs, 5661 bool OfBlockPointer, 5662 bool Unqualified) { 5663 // GNU extension: two types are compatible if they appear as a function 5664 // argument, one of the types is a transparent union type and the other 5665 // type is compatible with a union member 5666 QualType lmerge = mergeTransparentUnionType(lhs, rhs, OfBlockPointer, 5667 Unqualified); 5668 if (!lmerge.isNull()) 5669 return lmerge; 5670 5671 QualType rmerge = mergeTransparentUnionType(rhs, lhs, OfBlockPointer, 5672 Unqualified); 5673 if (!rmerge.isNull()) 5674 return rmerge; 5675 5676 return mergeTypes(lhs, rhs, OfBlockPointer, Unqualified); 5677} 5678 5679QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs, 5680 bool OfBlockPointer, 5681 bool Unqualified) { 5682 const FunctionType *lbase = lhs->getAs<FunctionType>(); 5683 const FunctionType *rbase = rhs->getAs<FunctionType>(); 5684 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 5685 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 5686 bool allLTypes = true; 5687 bool allRTypes = true; 5688 5689 // Check return type 5690 QualType retType; 5691 if (OfBlockPointer) { 5692 QualType RHS = rbase->getResultType(); 5693 QualType LHS = lbase->getResultType(); 5694 bool UnqualifiedResult = Unqualified; 5695 if (!UnqualifiedResult) 5696 UnqualifiedResult = (!RHS.hasQualifiers() && LHS.hasQualifiers()); 5697 retType = mergeTypes(LHS, RHS, true, UnqualifiedResult, true); 5698 } 5699 else 5700 retType = mergeTypes(lbase->getResultType(), rbase->getResultType(), false, 5701 Unqualified); 5702 if (retType.isNull()) return QualType(); 5703 5704 if (Unqualified) 5705 retType = retType.getUnqualifiedType(); 5706 5707 CanQualType LRetType = getCanonicalType(lbase->getResultType()); 5708 CanQualType RRetType = getCanonicalType(rbase->getResultType()); 5709 if (Unqualified) { 5710 LRetType = LRetType.getUnqualifiedType(); 5711 RRetType = RRetType.getUnqualifiedType(); 5712 } 5713 5714 if (getCanonicalType(retType) != LRetType) 5715 allLTypes = false; 5716 if (getCanonicalType(retType) != RRetType) 5717 allRTypes = false; 5718 5719 // FIXME: double check this 5720 // FIXME: should we error if lbase->getRegParmAttr() != 0 && 5721 // rbase->getRegParmAttr() != 0 && 5722 // lbase->getRegParmAttr() != rbase->getRegParmAttr()? 5723 FunctionType::ExtInfo lbaseInfo = lbase->getExtInfo(); 5724 FunctionType::ExtInfo rbaseInfo = rbase->getExtInfo(); 5725 5726 // Compatible functions must have compatible calling conventions 5727 if (!isSameCallConv(lbaseInfo.getCC(), rbaseInfo.getCC())) 5728 return QualType(); 5729 5730 // Regparm is part of the calling convention. 5731 if (lbaseInfo.getHasRegParm() != rbaseInfo.getHasRegParm()) 5732 return QualType(); 5733 if (lbaseInfo.getRegParm() != rbaseInfo.getRegParm()) 5734 return QualType(); 5735 5736 if (lbaseInfo.getProducesResult() != rbaseInfo.getProducesResult()) 5737 return QualType(); 5738 5739 // functypes which return are preferred over those that do not. 5740 if (lbaseInfo.getNoReturn() && !rbaseInfo.getNoReturn()) 5741 allLTypes = false; 5742 else if (!lbaseInfo.getNoReturn() && rbaseInfo.getNoReturn()) 5743 allRTypes = false; 5744 // FIXME: some uses, e.g. conditional exprs, really want this to be 'both'. 5745 bool NoReturn = lbaseInfo.getNoReturn() || rbaseInfo.getNoReturn(); 5746 5747 FunctionType::ExtInfo einfo = lbaseInfo.withNoReturn(NoReturn); 5748 5749 if (lproto && rproto) { // two C99 style function prototypes 5750 assert(!lproto->hasExceptionSpec() && !rproto->hasExceptionSpec() && 5751 "C++ shouldn't be here"); 5752 unsigned lproto_nargs = lproto->getNumArgs(); 5753 unsigned rproto_nargs = rproto->getNumArgs(); 5754 5755 // Compatible functions must have the same number of arguments 5756 if (lproto_nargs != rproto_nargs) 5757 return QualType(); 5758 5759 // Variadic and non-variadic functions aren't compatible 5760 if (lproto->isVariadic() != rproto->isVariadic()) 5761 return QualType(); 5762 5763 if (lproto->getTypeQuals() != rproto->getTypeQuals()) 5764 return QualType(); 5765 5766 if (LangOpts.ObjCAutoRefCount && 5767 !FunctionTypesMatchOnNSConsumedAttrs(rproto, lproto)) 5768 return QualType(); 5769 5770 // Check argument compatibility 5771 SmallVector<QualType, 10> types; 5772 for (unsigned i = 0; i < lproto_nargs; i++) { 5773 QualType largtype = lproto->getArgType(i).getUnqualifiedType(); 5774 QualType rargtype = rproto->getArgType(i).getUnqualifiedType(); 5775 QualType argtype = mergeFunctionArgumentTypes(largtype, rargtype, 5776 OfBlockPointer, 5777 Unqualified); 5778 if (argtype.isNull()) return QualType(); 5779 5780 if (Unqualified) 5781 argtype = argtype.getUnqualifiedType(); 5782 5783 types.push_back(argtype); 5784 if (Unqualified) { 5785 largtype = largtype.getUnqualifiedType(); 5786 rargtype = rargtype.getUnqualifiedType(); 5787 } 5788 5789 if (getCanonicalType(argtype) != getCanonicalType(largtype)) 5790 allLTypes = false; 5791 if (getCanonicalType(argtype) != getCanonicalType(rargtype)) 5792 allRTypes = false; 5793 } 5794 5795 if (allLTypes) return lhs; 5796 if (allRTypes) return rhs; 5797 5798 FunctionProtoType::ExtProtoInfo EPI = lproto->getExtProtoInfo(); 5799 EPI.ExtInfo = einfo; 5800 return getFunctionType(retType, types.begin(), types.size(), EPI); 5801 } 5802 5803 if (lproto) allRTypes = false; 5804 if (rproto) allLTypes = false; 5805 5806 const FunctionProtoType *proto = lproto ? lproto : rproto; 5807 if (proto) { 5808 assert(!proto->hasExceptionSpec() && "C++ shouldn't be here"); 5809 if (proto->isVariadic()) return QualType(); 5810 // Check that the types are compatible with the types that 5811 // would result from default argument promotions (C99 6.7.5.3p15). 5812 // The only types actually affected are promotable integer 5813 // types and floats, which would be passed as a different 5814 // type depending on whether the prototype is visible. 5815 unsigned proto_nargs = proto->getNumArgs(); 5816 for (unsigned i = 0; i < proto_nargs; ++i) { 5817 QualType argTy = proto->getArgType(i); 5818 5819 // Look at the promotion type of enum types, since that is the type used 5820 // to pass enum values. 5821 if (const EnumType *Enum = argTy->getAs<EnumType>()) 5822 argTy = Enum->getDecl()->getPromotionType(); 5823 5824 if (argTy->isPromotableIntegerType() || 5825 getCanonicalType(argTy).getUnqualifiedType() == FloatTy) 5826 return QualType(); 5827 } 5828 5829 if (allLTypes) return lhs; 5830 if (allRTypes) return rhs; 5831 5832 FunctionProtoType::ExtProtoInfo EPI = proto->getExtProtoInfo(); 5833 EPI.ExtInfo = einfo; 5834 return getFunctionType(retType, proto->arg_type_begin(), 5835 proto->getNumArgs(), EPI); 5836 } 5837 5838 if (allLTypes) return lhs; 5839 if (allRTypes) return rhs; 5840 return getFunctionNoProtoType(retType, einfo); 5841} 5842 5843QualType ASTContext::mergeTypes(QualType LHS, QualType RHS, 5844 bool OfBlockPointer, 5845 bool Unqualified, bool BlockReturnType) { 5846 // C++ [expr]: If an expression initially has the type "reference to T", the 5847 // type is adjusted to "T" prior to any further analysis, the expression 5848 // designates the object or function denoted by the reference, and the 5849 // expression is an lvalue unless the reference is an rvalue reference and 5850 // the expression is a function call (possibly inside parentheses). 5851 assert(!LHS->getAs<ReferenceType>() && "LHS is a reference type?"); 5852 assert(!RHS->getAs<ReferenceType>() && "RHS is a reference type?"); 5853 5854 if (Unqualified) { 5855 LHS = LHS.getUnqualifiedType(); 5856 RHS = RHS.getUnqualifiedType(); 5857 } 5858 5859 QualType LHSCan = getCanonicalType(LHS), 5860 RHSCan = getCanonicalType(RHS); 5861 5862 // If two types are identical, they are compatible. 5863 if (LHSCan == RHSCan) 5864 return LHS; 5865 5866 // If the qualifiers are different, the types aren't compatible... mostly. 5867 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 5868 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 5869 if (LQuals != RQuals) { 5870 // If any of these qualifiers are different, we have a type 5871 // mismatch. 5872 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 5873 LQuals.getAddressSpace() != RQuals.getAddressSpace() || 5874 LQuals.getObjCLifetime() != RQuals.getObjCLifetime()) 5875 return QualType(); 5876 5877 // Exactly one GC qualifier difference is allowed: __strong is 5878 // okay if the other type has no GC qualifier but is an Objective 5879 // C object pointer (i.e. implicitly strong by default). We fix 5880 // this by pretending that the unqualified type was actually 5881 // qualified __strong. 5882 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 5883 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 5884 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 5885 5886 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 5887 return QualType(); 5888 5889 if (GC_L == Qualifiers::Strong && RHSCan->isObjCObjectPointerType()) { 5890 return mergeTypes(LHS, getObjCGCQualType(RHS, Qualifiers::Strong)); 5891 } 5892 if (GC_R == Qualifiers::Strong && LHSCan->isObjCObjectPointerType()) { 5893 return mergeTypes(getObjCGCQualType(LHS, Qualifiers::Strong), RHS); 5894 } 5895 return QualType(); 5896 } 5897 5898 // Okay, qualifiers are equal. 5899 5900 Type::TypeClass LHSClass = LHSCan->getTypeClass(); 5901 Type::TypeClass RHSClass = RHSCan->getTypeClass(); 5902 5903 // We want to consider the two function types to be the same for these 5904 // comparisons, just force one to the other. 5905 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto; 5906 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto; 5907 5908 // Same as above for arrays 5909 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray) 5910 LHSClass = Type::ConstantArray; 5911 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray) 5912 RHSClass = Type::ConstantArray; 5913 5914 // ObjCInterfaces are just specialized ObjCObjects. 5915 if (LHSClass == Type::ObjCInterface) LHSClass = Type::ObjCObject; 5916 if (RHSClass == Type::ObjCInterface) RHSClass = Type::ObjCObject; 5917 5918 // Canonicalize ExtVector -> Vector. 5919 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector; 5920 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector; 5921 5922 // If the canonical type classes don't match. 5923 if (LHSClass != RHSClass) { 5924 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char, 5925 // a signed integer type, or an unsigned integer type. 5926 // Compatibility is based on the underlying type, not the promotion 5927 // type. 5928 if (const EnumType* ETy = LHS->getAs<EnumType>()) { 5929 if (ETy->getDecl()->getIntegerType() == RHSCan.getUnqualifiedType()) 5930 return RHS; 5931 } 5932 if (const EnumType* ETy = RHS->getAs<EnumType>()) { 5933 if (ETy->getDecl()->getIntegerType() == LHSCan.getUnqualifiedType()) 5934 return LHS; 5935 } 5936 // allow block pointer type to match an 'id' type. 5937 if (OfBlockPointer && !BlockReturnType && 5938 LHS->isObjCIdType() && RHS->isBlockPointerType()) 5939 return LHS; 5940 5941 return QualType(); 5942 } 5943 5944 // The canonical type classes match. 5945 switch (LHSClass) { 5946#define TYPE(Class, Base) 5947#define ABSTRACT_TYPE(Class, Base) 5948#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) case Type::Class: 5949#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 5950#define DEPENDENT_TYPE(Class, Base) case Type::Class: 5951#include "clang/AST/TypeNodes.def" 5952 llvm_unreachable("Non-canonical and dependent types shouldn't get here"); 5953 5954 case Type::LValueReference: 5955 case Type::RValueReference: 5956 case Type::MemberPointer: 5957 llvm_unreachable("C++ should never be in mergeTypes"); 5958 5959 case Type::ObjCInterface: 5960 case Type::IncompleteArray: 5961 case Type::VariableArray: 5962 case Type::FunctionProto: 5963 case Type::ExtVector: 5964 llvm_unreachable("Types are eliminated above"); 5965 5966 case Type::Pointer: 5967 { 5968 // Merge two pointer types, while trying to preserve typedef info 5969 QualType LHSPointee = LHS->getAs<PointerType>()->getPointeeType(); 5970 QualType RHSPointee = RHS->getAs<PointerType>()->getPointeeType(); 5971 if (Unqualified) { 5972 LHSPointee = LHSPointee.getUnqualifiedType(); 5973 RHSPointee = RHSPointee.getUnqualifiedType(); 5974 } 5975 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, false, 5976 Unqualified); 5977 if (ResultType.isNull()) return QualType(); 5978 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 5979 return LHS; 5980 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 5981 return RHS; 5982 return getPointerType(ResultType); 5983 } 5984 case Type::BlockPointer: 5985 { 5986 // Merge two block pointer types, while trying to preserve typedef info 5987 QualType LHSPointee = LHS->getAs<BlockPointerType>()->getPointeeType(); 5988 QualType RHSPointee = RHS->getAs<BlockPointerType>()->getPointeeType(); 5989 if (Unqualified) { 5990 LHSPointee = LHSPointee.getUnqualifiedType(); 5991 RHSPointee = RHSPointee.getUnqualifiedType(); 5992 } 5993 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, OfBlockPointer, 5994 Unqualified); 5995 if (ResultType.isNull()) return QualType(); 5996 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 5997 return LHS; 5998 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 5999 return RHS; 6000 return getBlockPointerType(ResultType); 6001 } 6002 case Type::Atomic: 6003 { 6004 // Merge two pointer types, while trying to preserve typedef info 6005 QualType LHSValue = LHS->getAs<AtomicType>()->getValueType(); 6006 QualType RHSValue = RHS->getAs<AtomicType>()->getValueType(); 6007 if (Unqualified) { 6008 LHSValue = LHSValue.getUnqualifiedType(); 6009 RHSValue = RHSValue.getUnqualifiedType(); 6010 } 6011 QualType ResultType = mergeTypes(LHSValue, RHSValue, false, 6012 Unqualified); 6013 if (ResultType.isNull()) return QualType(); 6014 if (getCanonicalType(LHSValue) == getCanonicalType(ResultType)) 6015 return LHS; 6016 if (getCanonicalType(RHSValue) == getCanonicalType(ResultType)) 6017 return RHS; 6018 return getAtomicType(ResultType); 6019 } 6020 case Type::ConstantArray: 6021 { 6022 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS); 6023 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS); 6024 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize()) 6025 return QualType(); 6026 6027 QualType LHSElem = getAsArrayType(LHS)->getElementType(); 6028 QualType RHSElem = getAsArrayType(RHS)->getElementType(); 6029 if (Unqualified) { 6030 LHSElem = LHSElem.getUnqualifiedType(); 6031 RHSElem = RHSElem.getUnqualifiedType(); 6032 } 6033 6034 QualType ResultType = mergeTypes(LHSElem, RHSElem, false, Unqualified); 6035 if (ResultType.isNull()) return QualType(); 6036 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 6037 return LHS; 6038 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 6039 return RHS; 6040 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(), 6041 ArrayType::ArraySizeModifier(), 0); 6042 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(), 6043 ArrayType::ArraySizeModifier(), 0); 6044 const VariableArrayType* LVAT = getAsVariableArrayType(LHS); 6045 const VariableArrayType* RVAT = getAsVariableArrayType(RHS); 6046 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 6047 return LHS; 6048 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 6049 return RHS; 6050 if (LVAT) { 6051 // FIXME: This isn't correct! But tricky to implement because 6052 // the array's size has to be the size of LHS, but the type 6053 // has to be different. 6054 return LHS; 6055 } 6056 if (RVAT) { 6057 // FIXME: This isn't correct! But tricky to implement because 6058 // the array's size has to be the size of RHS, but the type 6059 // has to be different. 6060 return RHS; 6061 } 6062 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS; 6063 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS; 6064 return getIncompleteArrayType(ResultType, 6065 ArrayType::ArraySizeModifier(), 0); 6066 } 6067 case Type::FunctionNoProto: 6068 return mergeFunctionTypes(LHS, RHS, OfBlockPointer, Unqualified); 6069 case Type::Record: 6070 case Type::Enum: 6071 return QualType(); 6072 case Type::Builtin: 6073 // Only exactly equal builtin types are compatible, which is tested above. 6074 return QualType(); 6075 case Type::Complex: 6076 // Distinct complex types are incompatible. 6077 return QualType(); 6078 case Type::Vector: 6079 // FIXME: The merged type should be an ExtVector! 6080 if (areCompatVectorTypes(LHSCan->getAs<VectorType>(), 6081 RHSCan->getAs<VectorType>())) 6082 return LHS; 6083 return QualType(); 6084 case Type::ObjCObject: { 6085 // Check if the types are assignment compatible. 6086 // FIXME: This should be type compatibility, e.g. whether 6087 // "LHS x; RHS x;" at global scope is legal. 6088 const ObjCObjectType* LHSIface = LHS->getAs<ObjCObjectType>(); 6089 const ObjCObjectType* RHSIface = RHS->getAs<ObjCObjectType>(); 6090 if (canAssignObjCInterfaces(LHSIface, RHSIface)) 6091 return LHS; 6092 6093 return QualType(); 6094 } 6095 case Type::ObjCObjectPointer: { 6096 if (OfBlockPointer) { 6097 if (canAssignObjCInterfacesInBlockPointer( 6098 LHS->getAs<ObjCObjectPointerType>(), 6099 RHS->getAs<ObjCObjectPointerType>(), 6100 BlockReturnType)) 6101 return LHS; 6102 return QualType(); 6103 } 6104 if (canAssignObjCInterfaces(LHS->getAs<ObjCObjectPointerType>(), 6105 RHS->getAs<ObjCObjectPointerType>())) 6106 return LHS; 6107 6108 return QualType(); 6109 } 6110 } 6111 6112 llvm_unreachable("Invalid Type::Class!"); 6113} 6114 6115bool ASTContext::FunctionTypesMatchOnNSConsumedAttrs( 6116 const FunctionProtoType *FromFunctionType, 6117 const FunctionProtoType *ToFunctionType) { 6118 if (FromFunctionType->hasAnyConsumedArgs() != 6119 ToFunctionType->hasAnyConsumedArgs()) 6120 return false; 6121 FunctionProtoType::ExtProtoInfo FromEPI = 6122 FromFunctionType->getExtProtoInfo(); 6123 FunctionProtoType::ExtProtoInfo ToEPI = 6124 ToFunctionType->getExtProtoInfo(); 6125 if (FromEPI.ConsumedArguments && ToEPI.ConsumedArguments) 6126 for (unsigned ArgIdx = 0, NumArgs = FromFunctionType->getNumArgs(); 6127 ArgIdx != NumArgs; ++ArgIdx) { 6128 if (FromEPI.ConsumedArguments[ArgIdx] != 6129 ToEPI.ConsumedArguments[ArgIdx]) 6130 return false; 6131 } 6132 return true; 6133} 6134 6135/// mergeObjCGCQualifiers - This routine merges ObjC's GC attribute of 'LHS' and 6136/// 'RHS' attributes and returns the merged version; including for function 6137/// return types. 6138QualType ASTContext::mergeObjCGCQualifiers(QualType LHS, QualType RHS) { 6139 QualType LHSCan = getCanonicalType(LHS), 6140 RHSCan = getCanonicalType(RHS); 6141 // If two types are identical, they are compatible. 6142 if (LHSCan == RHSCan) 6143 return LHS; 6144 if (RHSCan->isFunctionType()) { 6145 if (!LHSCan->isFunctionType()) 6146 return QualType(); 6147 QualType OldReturnType = 6148 cast<FunctionType>(RHSCan.getTypePtr())->getResultType(); 6149 QualType NewReturnType = 6150 cast<FunctionType>(LHSCan.getTypePtr())->getResultType(); 6151 QualType ResReturnType = 6152 mergeObjCGCQualifiers(NewReturnType, OldReturnType); 6153 if (ResReturnType.isNull()) 6154 return QualType(); 6155 if (ResReturnType == NewReturnType || ResReturnType == OldReturnType) { 6156 // id foo(); ... __strong id foo(); or: __strong id foo(); ... id foo(); 6157 // In either case, use OldReturnType to build the new function type. 6158 const FunctionType *F = LHS->getAs<FunctionType>(); 6159 if (const FunctionProtoType *FPT = cast<FunctionProtoType>(F)) { 6160 FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); 6161 EPI.ExtInfo = getFunctionExtInfo(LHS); 6162 QualType ResultType 6163 = getFunctionType(OldReturnType, FPT->arg_type_begin(), 6164 FPT->getNumArgs(), EPI); 6165 return ResultType; 6166 } 6167 } 6168 return QualType(); 6169 } 6170 6171 // If the qualifiers are different, the types can still be merged. 6172 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 6173 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 6174 if (LQuals != RQuals) { 6175 // If any of these qualifiers are different, we have a type mismatch. 6176 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 6177 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 6178 return QualType(); 6179 6180 // Exactly one GC qualifier difference is allowed: __strong is 6181 // okay if the other type has no GC qualifier but is an Objective 6182 // C object pointer (i.e. implicitly strong by default). We fix 6183 // this by pretending that the unqualified type was actually 6184 // qualified __strong. 6185 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 6186 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 6187 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 6188 6189 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 6190 return QualType(); 6191 6192 if (GC_L == Qualifiers::Strong) 6193 return LHS; 6194 if (GC_R == Qualifiers::Strong) 6195 return RHS; 6196 return QualType(); 6197 } 6198 6199 if (LHSCan->isObjCObjectPointerType() && RHSCan->isObjCObjectPointerType()) { 6200 QualType LHSBaseQT = LHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 6201 QualType RHSBaseQT = RHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 6202 QualType ResQT = mergeObjCGCQualifiers(LHSBaseQT, RHSBaseQT); 6203 if (ResQT == LHSBaseQT) 6204 return LHS; 6205 if (ResQT == RHSBaseQT) 6206 return RHS; 6207 } 6208 return QualType(); 6209} 6210 6211//===----------------------------------------------------------------------===// 6212// Integer Predicates 6213//===----------------------------------------------------------------------===// 6214 6215unsigned ASTContext::getIntWidth(QualType T) const { 6216 if (const EnumType *ET = dyn_cast<EnumType>(T)) 6217 T = ET->getDecl()->getIntegerType(); 6218 if (T->isBooleanType()) 6219 return 1; 6220 // For builtin types, just use the standard type sizing method 6221 return (unsigned)getTypeSize(T); 6222} 6223 6224QualType ASTContext::getCorrespondingUnsignedType(QualType T) { 6225 assert(T->hasSignedIntegerRepresentation() && "Unexpected type"); 6226 6227 // Turn <4 x signed int> -> <4 x unsigned int> 6228 if (const VectorType *VTy = T->getAs<VectorType>()) 6229 return getVectorType(getCorrespondingUnsignedType(VTy->getElementType()), 6230 VTy->getNumElements(), VTy->getVectorKind()); 6231 6232 // For enums, we return the unsigned version of the base type. 6233 if (const EnumType *ETy = T->getAs<EnumType>()) 6234 T = ETy->getDecl()->getIntegerType(); 6235 6236 const BuiltinType *BTy = T->getAs<BuiltinType>(); 6237 assert(BTy && "Unexpected signed integer type"); 6238 switch (BTy->getKind()) { 6239 case BuiltinType::Char_S: 6240 case BuiltinType::SChar: 6241 return UnsignedCharTy; 6242 case BuiltinType::Short: 6243 return UnsignedShortTy; 6244 case BuiltinType::Int: 6245 return UnsignedIntTy; 6246 case BuiltinType::Long: 6247 return UnsignedLongTy; 6248 case BuiltinType::LongLong: 6249 return UnsignedLongLongTy; 6250 case BuiltinType::Int128: 6251 return UnsignedInt128Ty; 6252 default: 6253 llvm_unreachable("Unexpected signed integer type"); 6254 } 6255} 6256 6257ASTMutationListener::~ASTMutationListener() { } 6258 6259 6260//===----------------------------------------------------------------------===// 6261// Builtin Type Computation 6262//===----------------------------------------------------------------------===// 6263 6264/// DecodeTypeFromStr - This decodes one type descriptor from Str, advancing the 6265/// pointer over the consumed characters. This returns the resultant type. If 6266/// AllowTypeModifiers is false then modifier like * are not parsed, just basic 6267/// types. This allows "v2i*" to be parsed as a pointer to a v2i instead of 6268/// a vector of "i*". 6269/// 6270/// RequiresICE is filled in on return to indicate whether the value is required 6271/// to be an Integer Constant Expression. 6272static QualType DecodeTypeFromStr(const char *&Str, const ASTContext &Context, 6273 ASTContext::GetBuiltinTypeError &Error, 6274 bool &RequiresICE, 6275 bool AllowTypeModifiers) { 6276 // Modifiers. 6277 int HowLong = 0; 6278 bool Signed = false, Unsigned = false; 6279 RequiresICE = false; 6280 6281 // Read the prefixed modifiers first. 6282 bool Done = false; 6283 while (!Done) { 6284 switch (*Str++) { 6285 default: Done = true; --Str; break; 6286 case 'I': 6287 RequiresICE = true; 6288 break; 6289 case 'S': 6290 assert(!Unsigned && "Can't use both 'S' and 'U' modifiers!"); 6291 assert(!Signed && "Can't use 'S' modifier multiple times!"); 6292 Signed = true; 6293 break; 6294 case 'U': 6295 assert(!Signed && "Can't use both 'S' and 'U' modifiers!"); 6296 assert(!Unsigned && "Can't use 'S' modifier multiple times!"); 6297 Unsigned = true; 6298 break; 6299 case 'L': 6300 assert(HowLong <= 2 && "Can't have LLLL modifier"); 6301 ++HowLong; 6302 break; 6303 } 6304 } 6305 6306 QualType Type; 6307 6308 // Read the base type. 6309 switch (*Str++) { 6310 default: llvm_unreachable("Unknown builtin type letter!"); 6311 case 'v': 6312 assert(HowLong == 0 && !Signed && !Unsigned && 6313 "Bad modifiers used with 'v'!"); 6314 Type = Context.VoidTy; 6315 break; 6316 case 'f': 6317 assert(HowLong == 0 && !Signed && !Unsigned && 6318 "Bad modifiers used with 'f'!"); 6319 Type = Context.FloatTy; 6320 break; 6321 case 'd': 6322 assert(HowLong < 2 && !Signed && !Unsigned && 6323 "Bad modifiers used with 'd'!"); 6324 if (HowLong) 6325 Type = Context.LongDoubleTy; 6326 else 6327 Type = Context.DoubleTy; 6328 break; 6329 case 's': 6330 assert(HowLong == 0 && "Bad modifiers used with 's'!"); 6331 if (Unsigned) 6332 Type = Context.UnsignedShortTy; 6333 else 6334 Type = Context.ShortTy; 6335 break; 6336 case 'i': 6337 if (HowLong == 3) 6338 Type = Unsigned ? Context.UnsignedInt128Ty : Context.Int128Ty; 6339 else if (HowLong == 2) 6340 Type = Unsigned ? Context.UnsignedLongLongTy : Context.LongLongTy; 6341 else if (HowLong == 1) 6342 Type = Unsigned ? Context.UnsignedLongTy : Context.LongTy; 6343 else 6344 Type = Unsigned ? Context.UnsignedIntTy : Context.IntTy; 6345 break; 6346 case 'c': 6347 assert(HowLong == 0 && "Bad modifiers used with 'c'!"); 6348 if (Signed) 6349 Type = Context.SignedCharTy; 6350 else if (Unsigned) 6351 Type = Context.UnsignedCharTy; 6352 else 6353 Type = Context.CharTy; 6354 break; 6355 case 'b': // boolean 6356 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'b'!"); 6357 Type = Context.BoolTy; 6358 break; 6359 case 'z': // size_t. 6360 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'z'!"); 6361 Type = Context.getSizeType(); 6362 break; 6363 case 'F': 6364 Type = Context.getCFConstantStringType(); 6365 break; 6366 case 'G': 6367 Type = Context.getObjCIdType(); 6368 break; 6369 case 'H': 6370 Type = Context.getObjCSelType(); 6371 break; 6372 case 'a': 6373 Type = Context.getBuiltinVaListType(); 6374 assert(!Type.isNull() && "builtin va list type not initialized!"); 6375 break; 6376 case 'A': 6377 // This is a "reference" to a va_list; however, what exactly 6378 // this means depends on how va_list is defined. There are two 6379 // different kinds of va_list: ones passed by value, and ones 6380 // passed by reference. An example of a by-value va_list is 6381 // x86, where va_list is a char*. An example of by-ref va_list 6382 // is x86-64, where va_list is a __va_list_tag[1]. For x86, 6383 // we want this argument to be a char*&; for x86-64, we want 6384 // it to be a __va_list_tag*. 6385 Type = Context.getBuiltinVaListType(); 6386 assert(!Type.isNull() && "builtin va list type not initialized!"); 6387 if (Type->isArrayType()) 6388 Type = Context.getArrayDecayedType(Type); 6389 else 6390 Type = Context.getLValueReferenceType(Type); 6391 break; 6392 case 'V': { 6393 char *End; 6394 unsigned NumElements = strtoul(Str, &End, 10); 6395 assert(End != Str && "Missing vector size"); 6396 Str = End; 6397 6398 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, 6399 RequiresICE, false); 6400 assert(!RequiresICE && "Can't require vector ICE"); 6401 6402 // TODO: No way to make AltiVec vectors in builtins yet. 6403 Type = Context.getVectorType(ElementType, NumElements, 6404 VectorType::GenericVector); 6405 break; 6406 } 6407 case 'X': { 6408 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, RequiresICE, 6409 false); 6410 assert(!RequiresICE && "Can't require complex ICE"); 6411 Type = Context.getComplexType(ElementType); 6412 break; 6413 } 6414 case 'Y' : { 6415 Type = Context.getPointerDiffType(); 6416 break; 6417 } 6418 case 'P': 6419 Type = Context.getFILEType(); 6420 if (Type.isNull()) { 6421 Error = ASTContext::GE_Missing_stdio; 6422 return QualType(); 6423 } 6424 break; 6425 case 'J': 6426 if (Signed) 6427 Type = Context.getsigjmp_bufType(); 6428 else 6429 Type = Context.getjmp_bufType(); 6430 6431 if (Type.isNull()) { 6432 Error = ASTContext::GE_Missing_setjmp; 6433 return QualType(); 6434 } 6435 break; 6436 case 'K': 6437 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'K'!"); 6438 Type = Context.getucontext_tType(); 6439 6440 if (Type.isNull()) { 6441 Error = ASTContext::GE_Missing_ucontext; 6442 return QualType(); 6443 } 6444 break; 6445 } 6446 6447 // If there are modifiers and if we're allowed to parse them, go for it. 6448 Done = !AllowTypeModifiers; 6449 while (!Done) { 6450 switch (char c = *Str++) { 6451 default: Done = true; --Str; break; 6452 case '*': 6453 case '&': { 6454 // Both pointers and references can have their pointee types 6455 // qualified with an address space. 6456 char *End; 6457 unsigned AddrSpace = strtoul(Str, &End, 10); 6458 if (End != Str && AddrSpace != 0) { 6459 Type = Context.getAddrSpaceQualType(Type, AddrSpace); 6460 Str = End; 6461 } 6462 if (c == '*') 6463 Type = Context.getPointerType(Type); 6464 else 6465 Type = Context.getLValueReferenceType(Type); 6466 break; 6467 } 6468 // FIXME: There's no way to have a built-in with an rvalue ref arg. 6469 case 'C': 6470 Type = Type.withConst(); 6471 break; 6472 case 'D': 6473 Type = Context.getVolatileType(Type); 6474 break; 6475 case 'R': 6476 Type = Type.withRestrict(); 6477 break; 6478 } 6479 } 6480 6481 assert((!RequiresICE || Type->isIntegralOrEnumerationType()) && 6482 "Integer constant 'I' type must be an integer"); 6483 6484 return Type; 6485} 6486 6487/// GetBuiltinType - Return the type for the specified builtin. 6488QualType ASTContext::GetBuiltinType(unsigned Id, 6489 GetBuiltinTypeError &Error, 6490 unsigned *IntegerConstantArgs) const { 6491 const char *TypeStr = BuiltinInfo.GetTypeString(Id); 6492 6493 SmallVector<QualType, 8> ArgTypes; 6494 6495 bool RequiresICE = false; 6496 Error = GE_None; 6497 QualType ResType = DecodeTypeFromStr(TypeStr, *this, Error, 6498 RequiresICE, true); 6499 if (Error != GE_None) 6500 return QualType(); 6501 6502 assert(!RequiresICE && "Result of intrinsic cannot be required to be an ICE"); 6503 6504 while (TypeStr[0] && TypeStr[0] != '.') { 6505 QualType Ty = DecodeTypeFromStr(TypeStr, *this, Error, RequiresICE, true); 6506 if (Error != GE_None) 6507 return QualType(); 6508 6509 // If this argument is required to be an IntegerConstantExpression and the 6510 // caller cares, fill in the bitmask we return. 6511 if (RequiresICE && IntegerConstantArgs) 6512 *IntegerConstantArgs |= 1 << ArgTypes.size(); 6513 6514 // Do array -> pointer decay. The builtin should use the decayed type. 6515 if (Ty->isArrayType()) 6516 Ty = getArrayDecayedType(Ty); 6517 6518 ArgTypes.push_back(Ty); 6519 } 6520 6521 assert((TypeStr[0] != '.' || TypeStr[1] == 0) && 6522 "'.' should only occur at end of builtin type list!"); 6523 6524 FunctionType::ExtInfo EI; 6525 if (BuiltinInfo.isNoReturn(Id)) EI = EI.withNoReturn(true); 6526 6527 bool Variadic = (TypeStr[0] == '.'); 6528 6529 // We really shouldn't be making a no-proto type here, especially in C++. 6530 if (ArgTypes.empty() && Variadic) 6531 return getFunctionNoProtoType(ResType, EI); 6532 6533 FunctionProtoType::ExtProtoInfo EPI; 6534 EPI.ExtInfo = EI; 6535 EPI.Variadic = Variadic; 6536 6537 return getFunctionType(ResType, ArgTypes.data(), ArgTypes.size(), EPI); 6538} 6539 6540GVALinkage ASTContext::GetGVALinkageForFunction(const FunctionDecl *FD) { 6541 GVALinkage External = GVA_StrongExternal; 6542 6543 Linkage L = FD->getLinkage(); 6544 switch (L) { 6545 case NoLinkage: 6546 case InternalLinkage: 6547 case UniqueExternalLinkage: 6548 return GVA_Internal; 6549 6550 case ExternalLinkage: 6551 switch (FD->getTemplateSpecializationKind()) { 6552 case TSK_Undeclared: 6553 case TSK_ExplicitSpecialization: 6554 External = GVA_StrongExternal; 6555 break; 6556 6557 case TSK_ExplicitInstantiationDefinition: 6558 return GVA_ExplicitTemplateInstantiation; 6559 6560 case TSK_ExplicitInstantiationDeclaration: 6561 case TSK_ImplicitInstantiation: 6562 External = GVA_TemplateInstantiation; 6563 break; 6564 } 6565 } 6566 6567 if (!FD->isInlined()) 6568 return External; 6569 6570 if (!getLangOptions().CPlusPlus || FD->hasAttr<GNUInlineAttr>()) { 6571 // GNU or C99 inline semantics. Determine whether this symbol should be 6572 // externally visible. 6573 if (FD->isInlineDefinitionExternallyVisible()) 6574 return External; 6575 6576 // C99 inline semantics, where the symbol is not externally visible. 6577 return GVA_C99Inline; 6578 } 6579 6580 // C++0x [temp.explicit]p9: 6581 // [ Note: The intent is that an inline function that is the subject of 6582 // an explicit instantiation declaration will still be implicitly 6583 // instantiated when used so that the body can be considered for 6584 // inlining, but that no out-of-line copy of the inline function would be 6585 // generated in the translation unit. -- end note ] 6586 if (FD->getTemplateSpecializationKind() 6587 == TSK_ExplicitInstantiationDeclaration) 6588 return GVA_C99Inline; 6589 6590 return GVA_CXXInline; 6591} 6592 6593GVALinkage ASTContext::GetGVALinkageForVariable(const VarDecl *VD) { 6594 // If this is a static data member, compute the kind of template 6595 // specialization. Otherwise, this variable is not part of a 6596 // template. 6597 TemplateSpecializationKind TSK = TSK_Undeclared; 6598 if (VD->isStaticDataMember()) 6599 TSK = VD->getTemplateSpecializationKind(); 6600 6601 Linkage L = VD->getLinkage(); 6602 if (L == ExternalLinkage && getLangOptions().CPlusPlus && 6603 VD->getType()->getLinkage() == UniqueExternalLinkage) 6604 L = UniqueExternalLinkage; 6605 6606 switch (L) { 6607 case NoLinkage: 6608 case InternalLinkage: 6609 case UniqueExternalLinkage: 6610 return GVA_Internal; 6611 6612 case ExternalLinkage: 6613 switch (TSK) { 6614 case TSK_Undeclared: 6615 case TSK_ExplicitSpecialization: 6616 return GVA_StrongExternal; 6617 6618 case TSK_ExplicitInstantiationDeclaration: 6619 llvm_unreachable("Variable should not be instantiated"); 6620 // Fall through to treat this like any other instantiation. 6621 6622 case TSK_ExplicitInstantiationDefinition: 6623 return GVA_ExplicitTemplateInstantiation; 6624 6625 case TSK_ImplicitInstantiation: 6626 return GVA_TemplateInstantiation; 6627 } 6628 } 6629 6630 llvm_unreachable("Invalid Linkage!"); 6631} 6632 6633bool ASTContext::DeclMustBeEmitted(const Decl *D) { 6634 if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { 6635 if (!VD->isFileVarDecl()) 6636 return false; 6637 } else if (!isa<FunctionDecl>(D)) 6638 return false; 6639 6640 // Weak references don't produce any output by themselves. 6641 if (D->hasAttr<WeakRefAttr>()) 6642 return false; 6643 6644 // Aliases and used decls are required. 6645 if (D->hasAttr<AliasAttr>() || D->hasAttr<UsedAttr>()) 6646 return true; 6647 6648 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 6649 // Forward declarations aren't required. 6650 if (!FD->doesThisDeclarationHaveABody()) 6651 return FD->doesDeclarationForceExternallyVisibleDefinition(); 6652 6653 // Constructors and destructors are required. 6654 if (FD->hasAttr<ConstructorAttr>() || FD->hasAttr<DestructorAttr>()) 6655 return true; 6656 6657 // The key function for a class is required. 6658 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { 6659 const CXXRecordDecl *RD = MD->getParent(); 6660 if (MD->isOutOfLine() && RD->isDynamicClass()) { 6661 const CXXMethodDecl *KeyFunc = getKeyFunction(RD); 6662 if (KeyFunc && KeyFunc->getCanonicalDecl() == MD->getCanonicalDecl()) 6663 return true; 6664 } 6665 } 6666 6667 GVALinkage Linkage = GetGVALinkageForFunction(FD); 6668 6669 // static, static inline, always_inline, and extern inline functions can 6670 // always be deferred. Normal inline functions can be deferred in C99/C++. 6671 // Implicit template instantiations can also be deferred in C++. 6672 if (Linkage == GVA_Internal || Linkage == GVA_C99Inline || 6673 Linkage == GVA_CXXInline || Linkage == GVA_TemplateInstantiation) 6674 return false; 6675 return true; 6676 } 6677 6678 const VarDecl *VD = cast<VarDecl>(D); 6679 assert(VD->isFileVarDecl() && "Expected file scoped var"); 6680 6681 if (VD->isThisDeclarationADefinition() == VarDecl::DeclarationOnly) 6682 return false; 6683 6684 // Structs that have non-trivial constructors or destructors are required. 6685 6686 // FIXME: Handle references. 6687 // FIXME: Be more selective about which constructors we care about. 6688 if (const RecordType *RT = VD->getType()->getAs<RecordType>()) { 6689 if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(RT->getDecl())) { 6690 if (RD->hasDefinition() && !(RD->hasTrivialDefaultConstructor() && 6691 RD->hasTrivialCopyConstructor() && 6692 RD->hasTrivialMoveConstructor() && 6693 RD->hasTrivialDestructor())) 6694 return true; 6695 } 6696 } 6697 6698 GVALinkage L = GetGVALinkageForVariable(VD); 6699 if (L == GVA_Internal || L == GVA_TemplateInstantiation) { 6700 if (!(VD->getInit() && VD->getInit()->HasSideEffects(*this))) 6701 return false; 6702 } 6703 6704 return true; 6705} 6706 6707CallingConv ASTContext::getDefaultMethodCallConv() { 6708 // Pass through to the C++ ABI object 6709 return ABI->getDefaultMethodCallConv(); 6710} 6711 6712bool ASTContext::isNearlyEmpty(const CXXRecordDecl *RD) const { 6713 // Pass through to the C++ ABI object 6714 return ABI->isNearlyEmpty(RD); 6715} 6716 6717MangleContext *ASTContext::createMangleContext() { 6718 switch (Target->getCXXABI()) { 6719 case CXXABI_ARM: 6720 case CXXABI_Itanium: 6721 return createItaniumMangleContext(*this, getDiagnostics()); 6722 case CXXABI_Microsoft: 6723 return createMicrosoftMangleContext(*this, getDiagnostics()); 6724 } 6725 llvm_unreachable("Unsupported ABI"); 6726} 6727 6728CXXABI::~CXXABI() {} 6729 6730size_t ASTContext::getSideTableAllocatedMemory() const { 6731 return ASTRecordLayouts.getMemorySize() 6732 + llvm::capacity_in_bytes(ObjCLayouts) 6733 + llvm::capacity_in_bytes(KeyFunctions) 6734 + llvm::capacity_in_bytes(ObjCImpls) 6735 + llvm::capacity_in_bytes(BlockVarCopyInits) 6736 + llvm::capacity_in_bytes(DeclAttrs) 6737 + llvm::capacity_in_bytes(InstantiatedFromStaticDataMember) 6738 + llvm::capacity_in_bytes(InstantiatedFromUsingDecl) 6739 + llvm::capacity_in_bytes(InstantiatedFromUsingShadowDecl) 6740 + llvm::capacity_in_bytes(InstantiatedFromUnnamedFieldDecl) 6741 + llvm::capacity_in_bytes(OverriddenMethods) 6742 + llvm::capacity_in_bytes(Types) 6743 + llvm::capacity_in_bytes(VariableArrayTypes) 6744 + llvm::capacity_in_bytes(ClassScopeSpecializationPattern); 6745} 6746 6747void ASTContext::setParameterIndex(const ParmVarDecl *D, unsigned int index) { 6748 ParamIndices[D] = index; 6749} 6750 6751unsigned ASTContext::getParameterIndex(const ParmVarDecl *D) const { 6752 ParameterIndexTable::const_iterator I = ParamIndices.find(D); 6753 assert(I != ParamIndices.end() && 6754 "ParmIndices lacks entry set by ParmVarDecl"); 6755 return I->second; 6756} 6757