ASTContext.cpp revision d7a3e2c5f61cd4893f95b69a424fe4def3aa0f69
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(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 1250bool ASTContext::isSentinelNullExpr(const Expr *E) { 1251 if (!E) 1252 return false; 1253 1254 // nullptr_t is always treated as null. 1255 if (E->getType()->isNullPtrType()) return true; 1256 1257 if (E->getType()->isAnyPointerType() && 1258 E->IgnoreParenCasts()->isNullPointerConstant(*this, 1259 Expr::NPC_ValueDependentIsNull)) 1260 return true; 1261 1262 // Unfortunately, __null has type 'int'. 1263 if (isa<GNUNullExpr>(E)) return true; 1264 1265 return false; 1266} 1267 1268/// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 1269ObjCImplementationDecl *ASTContext::getObjCImplementation(ObjCInterfaceDecl *D) { 1270 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 1271 I = ObjCImpls.find(D); 1272 if (I != ObjCImpls.end()) 1273 return cast<ObjCImplementationDecl>(I->second); 1274 return 0; 1275} 1276/// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 1277ObjCCategoryImplDecl *ASTContext::getObjCImplementation(ObjCCategoryDecl *D) { 1278 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 1279 I = ObjCImpls.find(D); 1280 if (I != ObjCImpls.end()) 1281 return cast<ObjCCategoryImplDecl>(I->second); 1282 return 0; 1283} 1284 1285/// \brief Set the implementation of ObjCInterfaceDecl. 1286void ASTContext::setObjCImplementation(ObjCInterfaceDecl *IFaceD, 1287 ObjCImplementationDecl *ImplD) { 1288 assert(IFaceD && ImplD && "Passed null params"); 1289 ObjCImpls[IFaceD] = ImplD; 1290} 1291/// \brief Set the implementation of ObjCCategoryDecl. 1292void ASTContext::setObjCImplementation(ObjCCategoryDecl *CatD, 1293 ObjCCategoryImplDecl *ImplD) { 1294 assert(CatD && ImplD && "Passed null params"); 1295 ObjCImpls[CatD] = ImplD; 1296} 1297 1298ObjCInterfaceDecl *ASTContext::getObjContainingInterface(NamedDecl *ND) const { 1299 if (ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(ND->getDeclContext())) 1300 return ID; 1301 if (ObjCCategoryDecl *CD = dyn_cast<ObjCCategoryDecl>(ND->getDeclContext())) 1302 return CD->getClassInterface(); 1303 if (ObjCImplDecl *IMD = dyn_cast<ObjCImplDecl>(ND->getDeclContext())) 1304 return IMD->getClassInterface(); 1305 1306 return 0; 1307} 1308 1309/// \brief Get the copy initialization expression of VarDecl,or NULL if 1310/// none exists. 1311Expr *ASTContext::getBlockVarCopyInits(const VarDecl*VD) { 1312 assert(VD && "Passed null params"); 1313 assert(VD->hasAttr<BlocksAttr>() && 1314 "getBlockVarCopyInits - not __block var"); 1315 llvm::DenseMap<const VarDecl*, Expr*>::iterator 1316 I = BlockVarCopyInits.find(VD); 1317 return (I != BlockVarCopyInits.end()) ? cast<Expr>(I->second) : 0; 1318} 1319 1320/// \brief Set the copy inialization expression of a block var decl. 1321void ASTContext::setBlockVarCopyInits(VarDecl*VD, Expr* Init) { 1322 assert(VD && Init && "Passed null params"); 1323 assert(VD->hasAttr<BlocksAttr>() && 1324 "setBlockVarCopyInits - not __block var"); 1325 BlockVarCopyInits[VD] = Init; 1326} 1327 1328/// \brief Allocate an uninitialized TypeSourceInfo. 1329/// 1330/// The caller should initialize the memory held by TypeSourceInfo using 1331/// the TypeLoc wrappers. 1332/// 1333/// \param T the type that will be the basis for type source info. This type 1334/// should refer to how the declarator was written in source code, not to 1335/// what type semantic analysis resolved the declarator to. 1336TypeSourceInfo *ASTContext::CreateTypeSourceInfo(QualType T, 1337 unsigned DataSize) const { 1338 if (!DataSize) 1339 DataSize = TypeLoc::getFullDataSizeForType(T); 1340 else 1341 assert(DataSize == TypeLoc::getFullDataSizeForType(T) && 1342 "incorrect data size provided to CreateTypeSourceInfo!"); 1343 1344 TypeSourceInfo *TInfo = 1345 (TypeSourceInfo*)BumpAlloc.Allocate(sizeof(TypeSourceInfo) + DataSize, 8); 1346 new (TInfo) TypeSourceInfo(T); 1347 return TInfo; 1348} 1349 1350TypeSourceInfo *ASTContext::getTrivialTypeSourceInfo(QualType T, 1351 SourceLocation L) const { 1352 TypeSourceInfo *DI = CreateTypeSourceInfo(T); 1353 DI->getTypeLoc().initialize(const_cast<ASTContext &>(*this), L); 1354 return DI; 1355} 1356 1357const ASTRecordLayout & 1358ASTContext::getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) const { 1359 return getObjCLayout(D, 0); 1360} 1361 1362const ASTRecordLayout & 1363ASTContext::getASTObjCImplementationLayout( 1364 const ObjCImplementationDecl *D) const { 1365 return getObjCLayout(D->getClassInterface(), D); 1366} 1367 1368//===----------------------------------------------------------------------===// 1369// Type creation/memoization methods 1370//===----------------------------------------------------------------------===// 1371 1372QualType 1373ASTContext::getExtQualType(const Type *baseType, Qualifiers quals) const { 1374 unsigned fastQuals = quals.getFastQualifiers(); 1375 quals.removeFastQualifiers(); 1376 1377 // Check if we've already instantiated this type. 1378 llvm::FoldingSetNodeID ID; 1379 ExtQuals::Profile(ID, baseType, quals); 1380 void *insertPos = 0; 1381 if (ExtQuals *eq = ExtQualNodes.FindNodeOrInsertPos(ID, insertPos)) { 1382 assert(eq->getQualifiers() == quals); 1383 return QualType(eq, fastQuals); 1384 } 1385 1386 // If the base type is not canonical, make the appropriate canonical type. 1387 QualType canon; 1388 if (!baseType->isCanonicalUnqualified()) { 1389 SplitQualType canonSplit = baseType->getCanonicalTypeInternal().split(); 1390 canonSplit.second.addConsistentQualifiers(quals); 1391 canon = getExtQualType(canonSplit.first, canonSplit.second); 1392 1393 // Re-find the insert position. 1394 (void) ExtQualNodes.FindNodeOrInsertPos(ID, insertPos); 1395 } 1396 1397 ExtQuals *eq = new (*this, TypeAlignment) ExtQuals(baseType, canon, quals); 1398 ExtQualNodes.InsertNode(eq, insertPos); 1399 return QualType(eq, fastQuals); 1400} 1401 1402QualType 1403ASTContext::getAddrSpaceQualType(QualType T, unsigned AddressSpace) const { 1404 QualType CanT = getCanonicalType(T); 1405 if (CanT.getAddressSpace() == AddressSpace) 1406 return T; 1407 1408 // If we are composing extended qualifiers together, merge together 1409 // into one ExtQuals node. 1410 QualifierCollector Quals; 1411 const Type *TypeNode = Quals.strip(T); 1412 1413 // If this type already has an address space specified, it cannot get 1414 // another one. 1415 assert(!Quals.hasAddressSpace() && 1416 "Type cannot be in multiple addr spaces!"); 1417 Quals.addAddressSpace(AddressSpace); 1418 1419 return getExtQualType(TypeNode, Quals); 1420} 1421 1422QualType ASTContext::getObjCGCQualType(QualType T, 1423 Qualifiers::GC GCAttr) const { 1424 QualType CanT = getCanonicalType(T); 1425 if (CanT.getObjCGCAttr() == GCAttr) 1426 return T; 1427 1428 if (const PointerType *ptr = T->getAs<PointerType>()) { 1429 QualType Pointee = ptr->getPointeeType(); 1430 if (Pointee->isAnyPointerType()) { 1431 QualType ResultType = getObjCGCQualType(Pointee, GCAttr); 1432 return getPointerType(ResultType); 1433 } 1434 } 1435 1436 // If we are composing extended qualifiers together, merge together 1437 // into one ExtQuals node. 1438 QualifierCollector Quals; 1439 const Type *TypeNode = Quals.strip(T); 1440 1441 // If this type already has an ObjCGC specified, it cannot get 1442 // another one. 1443 assert(!Quals.hasObjCGCAttr() && 1444 "Type cannot have multiple ObjCGCs!"); 1445 Quals.addObjCGCAttr(GCAttr); 1446 1447 return getExtQualType(TypeNode, Quals); 1448} 1449 1450const FunctionType *ASTContext::adjustFunctionType(const FunctionType *T, 1451 FunctionType::ExtInfo Info) { 1452 if (T->getExtInfo() == Info) 1453 return T; 1454 1455 QualType Result; 1456 if (const FunctionNoProtoType *FNPT = dyn_cast<FunctionNoProtoType>(T)) { 1457 Result = getFunctionNoProtoType(FNPT->getResultType(), Info); 1458 } else { 1459 const FunctionProtoType *FPT = cast<FunctionProtoType>(T); 1460 FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); 1461 EPI.ExtInfo = Info; 1462 Result = getFunctionType(FPT->getResultType(), FPT->arg_type_begin(), 1463 FPT->getNumArgs(), EPI); 1464 } 1465 1466 return cast<FunctionType>(Result.getTypePtr()); 1467} 1468 1469/// getComplexType - Return the uniqued reference to the type for a complex 1470/// number with the specified element type. 1471QualType ASTContext::getComplexType(QualType T) const { 1472 // Unique pointers, to guarantee there is only one pointer of a particular 1473 // structure. 1474 llvm::FoldingSetNodeID ID; 1475 ComplexType::Profile(ID, T); 1476 1477 void *InsertPos = 0; 1478 if (ComplexType *CT = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos)) 1479 return QualType(CT, 0); 1480 1481 // If the pointee type isn't canonical, this won't be a canonical type either, 1482 // so fill in the canonical type field. 1483 QualType Canonical; 1484 if (!T.isCanonical()) { 1485 Canonical = getComplexType(getCanonicalType(T)); 1486 1487 // Get the new insert position for the node we care about. 1488 ComplexType *NewIP = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos); 1489 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1490 } 1491 ComplexType *New = new (*this, TypeAlignment) ComplexType(T, Canonical); 1492 Types.push_back(New); 1493 ComplexTypes.InsertNode(New, InsertPos); 1494 return QualType(New, 0); 1495} 1496 1497/// getPointerType - Return the uniqued reference to the type for a pointer to 1498/// the specified type. 1499QualType ASTContext::getPointerType(QualType T) const { 1500 // Unique pointers, to guarantee there is only one pointer of a particular 1501 // structure. 1502 llvm::FoldingSetNodeID ID; 1503 PointerType::Profile(ID, T); 1504 1505 void *InsertPos = 0; 1506 if (PointerType *PT = PointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1507 return QualType(PT, 0); 1508 1509 // If the pointee type isn't canonical, this won't be a canonical type either, 1510 // so fill in the canonical type field. 1511 QualType Canonical; 1512 if (!T.isCanonical()) { 1513 Canonical = getPointerType(getCanonicalType(T)); 1514 1515 // Get the new insert position for the node we care about. 1516 PointerType *NewIP = PointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1517 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1518 } 1519 PointerType *New = new (*this, TypeAlignment) PointerType(T, Canonical); 1520 Types.push_back(New); 1521 PointerTypes.InsertNode(New, InsertPos); 1522 return QualType(New, 0); 1523} 1524 1525/// getBlockPointerType - Return the uniqued reference to the type for 1526/// a pointer to the specified block. 1527QualType ASTContext::getBlockPointerType(QualType T) const { 1528 assert(T->isFunctionType() && "block of function types only"); 1529 // Unique pointers, to guarantee there is only one block of a particular 1530 // structure. 1531 llvm::FoldingSetNodeID ID; 1532 BlockPointerType::Profile(ID, T); 1533 1534 void *InsertPos = 0; 1535 if (BlockPointerType *PT = 1536 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1537 return QualType(PT, 0); 1538 1539 // If the block pointee type isn't canonical, this won't be a canonical 1540 // type either so fill in the canonical type field. 1541 QualType Canonical; 1542 if (!T.isCanonical()) { 1543 Canonical = getBlockPointerType(getCanonicalType(T)); 1544 1545 // Get the new insert position for the node we care about. 1546 BlockPointerType *NewIP = 1547 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1548 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1549 } 1550 BlockPointerType *New 1551 = new (*this, TypeAlignment) BlockPointerType(T, Canonical); 1552 Types.push_back(New); 1553 BlockPointerTypes.InsertNode(New, InsertPos); 1554 return QualType(New, 0); 1555} 1556 1557/// getLValueReferenceType - Return the uniqued reference to the type for an 1558/// lvalue reference to the specified type. 1559QualType 1560ASTContext::getLValueReferenceType(QualType T, bool SpelledAsLValue) const { 1561 assert(getCanonicalType(T) != OverloadTy && 1562 "Unresolved overloaded function type"); 1563 1564 // Unique pointers, to guarantee there is only one pointer of a particular 1565 // structure. 1566 llvm::FoldingSetNodeID ID; 1567 ReferenceType::Profile(ID, T, SpelledAsLValue); 1568 1569 void *InsertPos = 0; 1570 if (LValueReferenceType *RT = 1571 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1572 return QualType(RT, 0); 1573 1574 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1575 1576 // If the referencee type isn't canonical, this won't be a canonical type 1577 // either, so fill in the canonical type field. 1578 QualType Canonical; 1579 if (!SpelledAsLValue || InnerRef || !T.isCanonical()) { 1580 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1581 Canonical = getLValueReferenceType(getCanonicalType(PointeeType)); 1582 1583 // Get the new insert position for the node we care about. 1584 LValueReferenceType *NewIP = 1585 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1586 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1587 } 1588 1589 LValueReferenceType *New 1590 = new (*this, TypeAlignment) LValueReferenceType(T, Canonical, 1591 SpelledAsLValue); 1592 Types.push_back(New); 1593 LValueReferenceTypes.InsertNode(New, InsertPos); 1594 1595 return QualType(New, 0); 1596} 1597 1598/// getRValueReferenceType - Return the uniqued reference to the type for an 1599/// rvalue reference to the specified type. 1600QualType ASTContext::getRValueReferenceType(QualType T) const { 1601 // Unique pointers, to guarantee there is only one pointer of a particular 1602 // structure. 1603 llvm::FoldingSetNodeID ID; 1604 ReferenceType::Profile(ID, T, false); 1605 1606 void *InsertPos = 0; 1607 if (RValueReferenceType *RT = 1608 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1609 return QualType(RT, 0); 1610 1611 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1612 1613 // If the referencee type isn't canonical, this won't be a canonical type 1614 // either, so fill in the canonical type field. 1615 QualType Canonical; 1616 if (InnerRef || !T.isCanonical()) { 1617 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1618 Canonical = getRValueReferenceType(getCanonicalType(PointeeType)); 1619 1620 // Get the new insert position for the node we care about. 1621 RValueReferenceType *NewIP = 1622 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1623 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1624 } 1625 1626 RValueReferenceType *New 1627 = new (*this, TypeAlignment) RValueReferenceType(T, Canonical); 1628 Types.push_back(New); 1629 RValueReferenceTypes.InsertNode(New, InsertPos); 1630 return QualType(New, 0); 1631} 1632 1633/// getMemberPointerType - Return the uniqued reference to the type for a 1634/// member pointer to the specified type, in the specified class. 1635QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls) const { 1636 // Unique pointers, to guarantee there is only one pointer of a particular 1637 // structure. 1638 llvm::FoldingSetNodeID ID; 1639 MemberPointerType::Profile(ID, T, Cls); 1640 1641 void *InsertPos = 0; 1642 if (MemberPointerType *PT = 1643 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1644 return QualType(PT, 0); 1645 1646 // If the pointee or class type isn't canonical, this won't be a canonical 1647 // type either, so fill in the canonical type field. 1648 QualType Canonical; 1649 if (!T.isCanonical() || !Cls->isCanonicalUnqualified()) { 1650 Canonical = getMemberPointerType(getCanonicalType(T),getCanonicalType(Cls)); 1651 1652 // Get the new insert position for the node we care about. 1653 MemberPointerType *NewIP = 1654 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1655 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1656 } 1657 MemberPointerType *New 1658 = new (*this, TypeAlignment) MemberPointerType(T, Cls, Canonical); 1659 Types.push_back(New); 1660 MemberPointerTypes.InsertNode(New, InsertPos); 1661 return QualType(New, 0); 1662} 1663 1664/// getConstantArrayType - Return the unique reference to the type for an 1665/// array of the specified element type. 1666QualType ASTContext::getConstantArrayType(QualType EltTy, 1667 const llvm::APInt &ArySizeIn, 1668 ArrayType::ArraySizeModifier ASM, 1669 unsigned IndexTypeQuals) const { 1670 assert((EltTy->isDependentType() || 1671 EltTy->isIncompleteType() || EltTy->isConstantSizeType()) && 1672 "Constant array of VLAs is illegal!"); 1673 1674 // Convert the array size into a canonical width matching the pointer size for 1675 // the target. 1676 llvm::APInt ArySize(ArySizeIn); 1677 ArySize = 1678 ArySize.zextOrTrunc(Target->getPointerWidth(getTargetAddressSpace(EltTy))); 1679 1680 llvm::FoldingSetNodeID ID; 1681 ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, IndexTypeQuals); 1682 1683 void *InsertPos = 0; 1684 if (ConstantArrayType *ATP = 1685 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1686 return QualType(ATP, 0); 1687 1688 // If the element type isn't canonical or has qualifiers, this won't 1689 // be a canonical type either, so fill in the canonical type field. 1690 QualType Canon; 1691 if (!EltTy.isCanonical() || EltTy.hasLocalQualifiers()) { 1692 SplitQualType canonSplit = getCanonicalType(EltTy).split(); 1693 Canon = getConstantArrayType(QualType(canonSplit.first, 0), ArySize, 1694 ASM, IndexTypeQuals); 1695 Canon = getQualifiedType(Canon, canonSplit.second); 1696 1697 // Get the new insert position for the node we care about. 1698 ConstantArrayType *NewIP = 1699 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1700 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1701 } 1702 1703 ConstantArrayType *New = new(*this,TypeAlignment) 1704 ConstantArrayType(EltTy, Canon, ArySize, ASM, IndexTypeQuals); 1705 ConstantArrayTypes.InsertNode(New, InsertPos); 1706 Types.push_back(New); 1707 return QualType(New, 0); 1708} 1709 1710/// getVariableArrayDecayedType - Turns the given type, which may be 1711/// variably-modified, into the corresponding type with all the known 1712/// sizes replaced with [*]. 1713QualType ASTContext::getVariableArrayDecayedType(QualType type) const { 1714 // Vastly most common case. 1715 if (!type->isVariablyModifiedType()) return type; 1716 1717 QualType result; 1718 1719 SplitQualType split = type.getSplitDesugaredType(); 1720 const Type *ty = split.first; 1721 switch (ty->getTypeClass()) { 1722#define TYPE(Class, Base) 1723#define ABSTRACT_TYPE(Class, Base) 1724#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 1725#include "clang/AST/TypeNodes.def" 1726 llvm_unreachable("didn't desugar past all non-canonical types?"); 1727 1728 // These types should never be variably-modified. 1729 case Type::Builtin: 1730 case Type::Complex: 1731 case Type::Vector: 1732 case Type::ExtVector: 1733 case Type::DependentSizedExtVector: 1734 case Type::ObjCObject: 1735 case Type::ObjCInterface: 1736 case Type::ObjCObjectPointer: 1737 case Type::Record: 1738 case Type::Enum: 1739 case Type::UnresolvedUsing: 1740 case Type::TypeOfExpr: 1741 case Type::TypeOf: 1742 case Type::Decltype: 1743 case Type::UnaryTransform: 1744 case Type::DependentName: 1745 case Type::InjectedClassName: 1746 case Type::TemplateSpecialization: 1747 case Type::DependentTemplateSpecialization: 1748 case Type::TemplateTypeParm: 1749 case Type::SubstTemplateTypeParmPack: 1750 case Type::Auto: 1751 case Type::PackExpansion: 1752 llvm_unreachable("type should never be variably-modified"); 1753 1754 // These types can be variably-modified but should never need to 1755 // further decay. 1756 case Type::FunctionNoProto: 1757 case Type::FunctionProto: 1758 case Type::BlockPointer: 1759 case Type::MemberPointer: 1760 return type; 1761 1762 // These types can be variably-modified. All these modifications 1763 // preserve structure except as noted by comments. 1764 // TODO: if we ever care about optimizing VLAs, there are no-op 1765 // optimizations available here. 1766 case Type::Pointer: 1767 result = getPointerType(getVariableArrayDecayedType( 1768 cast<PointerType>(ty)->getPointeeType())); 1769 break; 1770 1771 case Type::LValueReference: { 1772 const LValueReferenceType *lv = cast<LValueReferenceType>(ty); 1773 result = getLValueReferenceType( 1774 getVariableArrayDecayedType(lv->getPointeeType()), 1775 lv->isSpelledAsLValue()); 1776 break; 1777 } 1778 1779 case Type::RValueReference: { 1780 const RValueReferenceType *lv = cast<RValueReferenceType>(ty); 1781 result = getRValueReferenceType( 1782 getVariableArrayDecayedType(lv->getPointeeType())); 1783 break; 1784 } 1785 1786 case Type::Atomic: { 1787 const AtomicType *at = cast<AtomicType>(ty); 1788 result = getAtomicType(getVariableArrayDecayedType(at->getValueType())); 1789 break; 1790 } 1791 1792 case Type::ConstantArray: { 1793 const ConstantArrayType *cat = cast<ConstantArrayType>(ty); 1794 result = getConstantArrayType( 1795 getVariableArrayDecayedType(cat->getElementType()), 1796 cat->getSize(), 1797 cat->getSizeModifier(), 1798 cat->getIndexTypeCVRQualifiers()); 1799 break; 1800 } 1801 1802 case Type::DependentSizedArray: { 1803 const DependentSizedArrayType *dat = cast<DependentSizedArrayType>(ty); 1804 result = getDependentSizedArrayType( 1805 getVariableArrayDecayedType(dat->getElementType()), 1806 dat->getSizeExpr(), 1807 dat->getSizeModifier(), 1808 dat->getIndexTypeCVRQualifiers(), 1809 dat->getBracketsRange()); 1810 break; 1811 } 1812 1813 // Turn incomplete types into [*] types. 1814 case Type::IncompleteArray: { 1815 const IncompleteArrayType *iat = cast<IncompleteArrayType>(ty); 1816 result = getVariableArrayType( 1817 getVariableArrayDecayedType(iat->getElementType()), 1818 /*size*/ 0, 1819 ArrayType::Normal, 1820 iat->getIndexTypeCVRQualifiers(), 1821 SourceRange()); 1822 break; 1823 } 1824 1825 // Turn VLA types into [*] types. 1826 case Type::VariableArray: { 1827 const VariableArrayType *vat = cast<VariableArrayType>(ty); 1828 result = getVariableArrayType( 1829 getVariableArrayDecayedType(vat->getElementType()), 1830 /*size*/ 0, 1831 ArrayType::Star, 1832 vat->getIndexTypeCVRQualifiers(), 1833 vat->getBracketsRange()); 1834 break; 1835 } 1836 } 1837 1838 // Apply the top-level qualifiers from the original. 1839 return getQualifiedType(result, split.second); 1840} 1841 1842/// getVariableArrayType - Returns a non-unique reference to the type for a 1843/// variable array of the specified element type. 1844QualType ASTContext::getVariableArrayType(QualType EltTy, 1845 Expr *NumElts, 1846 ArrayType::ArraySizeModifier ASM, 1847 unsigned IndexTypeQuals, 1848 SourceRange Brackets) const { 1849 // Since we don't unique expressions, it isn't possible to unique VLA's 1850 // that have an expression provided for their size. 1851 QualType Canon; 1852 1853 // Be sure to pull qualifiers off the element type. 1854 if (!EltTy.isCanonical() || EltTy.hasLocalQualifiers()) { 1855 SplitQualType canonSplit = getCanonicalType(EltTy).split(); 1856 Canon = getVariableArrayType(QualType(canonSplit.first, 0), NumElts, ASM, 1857 IndexTypeQuals, Brackets); 1858 Canon = getQualifiedType(Canon, canonSplit.second); 1859 } 1860 1861 VariableArrayType *New = new(*this, TypeAlignment) 1862 VariableArrayType(EltTy, Canon, NumElts, ASM, IndexTypeQuals, Brackets); 1863 1864 VariableArrayTypes.push_back(New); 1865 Types.push_back(New); 1866 return QualType(New, 0); 1867} 1868 1869/// getDependentSizedArrayType - Returns a non-unique reference to 1870/// the type for a dependently-sized array of the specified element 1871/// type. 1872QualType ASTContext::getDependentSizedArrayType(QualType elementType, 1873 Expr *numElements, 1874 ArrayType::ArraySizeModifier ASM, 1875 unsigned elementTypeQuals, 1876 SourceRange brackets) const { 1877 assert((!numElements || numElements->isTypeDependent() || 1878 numElements->isValueDependent()) && 1879 "Size must be type- or value-dependent!"); 1880 1881 // Dependently-sized array types that do not have a specified number 1882 // of elements will have their sizes deduced from a dependent 1883 // initializer. We do no canonicalization here at all, which is okay 1884 // because they can't be used in most locations. 1885 if (!numElements) { 1886 DependentSizedArrayType *newType 1887 = new (*this, TypeAlignment) 1888 DependentSizedArrayType(*this, elementType, QualType(), 1889 numElements, ASM, elementTypeQuals, 1890 brackets); 1891 Types.push_back(newType); 1892 return QualType(newType, 0); 1893 } 1894 1895 // Otherwise, we actually build a new type every time, but we 1896 // also build a canonical type. 1897 1898 SplitQualType canonElementType = getCanonicalType(elementType).split(); 1899 1900 void *insertPos = 0; 1901 llvm::FoldingSetNodeID ID; 1902 DependentSizedArrayType::Profile(ID, *this, 1903 QualType(canonElementType.first, 0), 1904 ASM, elementTypeQuals, numElements); 1905 1906 // Look for an existing type with these properties. 1907 DependentSizedArrayType *canonTy = 1908 DependentSizedArrayTypes.FindNodeOrInsertPos(ID, insertPos); 1909 1910 // If we don't have one, build one. 1911 if (!canonTy) { 1912 canonTy = new (*this, TypeAlignment) 1913 DependentSizedArrayType(*this, QualType(canonElementType.first, 0), 1914 QualType(), numElements, ASM, elementTypeQuals, 1915 brackets); 1916 DependentSizedArrayTypes.InsertNode(canonTy, insertPos); 1917 Types.push_back(canonTy); 1918 } 1919 1920 // Apply qualifiers from the element type to the array. 1921 QualType canon = getQualifiedType(QualType(canonTy,0), 1922 canonElementType.second); 1923 1924 // If we didn't need extra canonicalization for the element type, 1925 // then just use that as our result. 1926 if (QualType(canonElementType.first, 0) == elementType) 1927 return canon; 1928 1929 // Otherwise, we need to build a type which follows the spelling 1930 // of the element type. 1931 DependentSizedArrayType *sugaredType 1932 = new (*this, TypeAlignment) 1933 DependentSizedArrayType(*this, elementType, canon, numElements, 1934 ASM, elementTypeQuals, brackets); 1935 Types.push_back(sugaredType); 1936 return QualType(sugaredType, 0); 1937} 1938 1939QualType ASTContext::getIncompleteArrayType(QualType elementType, 1940 ArrayType::ArraySizeModifier ASM, 1941 unsigned elementTypeQuals) const { 1942 llvm::FoldingSetNodeID ID; 1943 IncompleteArrayType::Profile(ID, elementType, ASM, elementTypeQuals); 1944 1945 void *insertPos = 0; 1946 if (IncompleteArrayType *iat = 1947 IncompleteArrayTypes.FindNodeOrInsertPos(ID, insertPos)) 1948 return QualType(iat, 0); 1949 1950 // If the element type isn't canonical, this won't be a canonical type 1951 // either, so fill in the canonical type field. We also have to pull 1952 // qualifiers off the element type. 1953 QualType canon; 1954 1955 if (!elementType.isCanonical() || elementType.hasLocalQualifiers()) { 1956 SplitQualType canonSplit = getCanonicalType(elementType).split(); 1957 canon = getIncompleteArrayType(QualType(canonSplit.first, 0), 1958 ASM, elementTypeQuals); 1959 canon = getQualifiedType(canon, canonSplit.second); 1960 1961 // Get the new insert position for the node we care about. 1962 IncompleteArrayType *existing = 1963 IncompleteArrayTypes.FindNodeOrInsertPos(ID, insertPos); 1964 assert(!existing && "Shouldn't be in the map!"); (void) existing; 1965 } 1966 1967 IncompleteArrayType *newType = new (*this, TypeAlignment) 1968 IncompleteArrayType(elementType, canon, ASM, elementTypeQuals); 1969 1970 IncompleteArrayTypes.InsertNode(newType, insertPos); 1971 Types.push_back(newType); 1972 return QualType(newType, 0); 1973} 1974 1975/// getVectorType - Return the unique reference to a vector type of 1976/// the specified element type and size. VectorType must be a built-in type. 1977QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts, 1978 VectorType::VectorKind VecKind) const { 1979 assert(vecType->isBuiltinType()); 1980 1981 // Check if we've already instantiated a vector of this type. 1982 llvm::FoldingSetNodeID ID; 1983 VectorType::Profile(ID, vecType, NumElts, Type::Vector, VecKind); 1984 1985 void *InsertPos = 0; 1986 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1987 return QualType(VTP, 0); 1988 1989 // If the element type isn't canonical, this won't be a canonical type either, 1990 // so fill in the canonical type field. 1991 QualType Canonical; 1992 if (!vecType.isCanonical()) { 1993 Canonical = getVectorType(getCanonicalType(vecType), NumElts, VecKind); 1994 1995 // Get the new insert position for the node we care about. 1996 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1997 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1998 } 1999 VectorType *New = new (*this, TypeAlignment) 2000 VectorType(vecType, NumElts, Canonical, VecKind); 2001 VectorTypes.InsertNode(New, InsertPos); 2002 Types.push_back(New); 2003 return QualType(New, 0); 2004} 2005 2006/// getExtVectorType - Return the unique reference to an extended vector type of 2007/// the specified element type and size. VectorType must be a built-in type. 2008QualType 2009ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) const { 2010 assert(vecType->isBuiltinType() || vecType->isDependentType()); 2011 2012 // Check if we've already instantiated a vector of this type. 2013 llvm::FoldingSetNodeID ID; 2014 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector, 2015 VectorType::GenericVector); 2016 void *InsertPos = 0; 2017 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 2018 return QualType(VTP, 0); 2019 2020 // If the element type isn't canonical, this won't be a canonical type either, 2021 // so fill in the canonical type field. 2022 QualType Canonical; 2023 if (!vecType.isCanonical()) { 2024 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts); 2025 2026 // Get the new insert position for the node we care about. 2027 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 2028 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 2029 } 2030 ExtVectorType *New = new (*this, TypeAlignment) 2031 ExtVectorType(vecType, NumElts, Canonical); 2032 VectorTypes.InsertNode(New, InsertPos); 2033 Types.push_back(New); 2034 return QualType(New, 0); 2035} 2036 2037QualType 2038ASTContext::getDependentSizedExtVectorType(QualType vecType, 2039 Expr *SizeExpr, 2040 SourceLocation AttrLoc) const { 2041 llvm::FoldingSetNodeID ID; 2042 DependentSizedExtVectorType::Profile(ID, *this, getCanonicalType(vecType), 2043 SizeExpr); 2044 2045 void *InsertPos = 0; 2046 DependentSizedExtVectorType *Canon 2047 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 2048 DependentSizedExtVectorType *New; 2049 if (Canon) { 2050 // We already have a canonical version of this array type; use it as 2051 // the canonical type for a newly-built type. 2052 New = new (*this, TypeAlignment) 2053 DependentSizedExtVectorType(*this, vecType, QualType(Canon, 0), 2054 SizeExpr, AttrLoc); 2055 } else { 2056 QualType CanonVecTy = getCanonicalType(vecType); 2057 if (CanonVecTy == vecType) { 2058 New = new (*this, TypeAlignment) 2059 DependentSizedExtVectorType(*this, vecType, QualType(), SizeExpr, 2060 AttrLoc); 2061 2062 DependentSizedExtVectorType *CanonCheck 2063 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 2064 assert(!CanonCheck && "Dependent-sized ext_vector canonical type broken"); 2065 (void)CanonCheck; 2066 DependentSizedExtVectorTypes.InsertNode(New, InsertPos); 2067 } else { 2068 QualType Canon = getDependentSizedExtVectorType(CanonVecTy, SizeExpr, 2069 SourceLocation()); 2070 New = new (*this, TypeAlignment) 2071 DependentSizedExtVectorType(*this, vecType, Canon, SizeExpr, AttrLoc); 2072 } 2073 } 2074 2075 Types.push_back(New); 2076 return QualType(New, 0); 2077} 2078 2079/// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 2080/// 2081QualType 2082ASTContext::getFunctionNoProtoType(QualType ResultTy, 2083 const FunctionType::ExtInfo &Info) const { 2084 const CallingConv DefaultCC = Info.getCC(); 2085 const CallingConv CallConv = (LangOpts.MRTD && DefaultCC == CC_Default) ? 2086 CC_X86StdCall : DefaultCC; 2087 // Unique functions, to guarantee there is only one function of a particular 2088 // structure. 2089 llvm::FoldingSetNodeID ID; 2090 FunctionNoProtoType::Profile(ID, ResultTy, Info); 2091 2092 void *InsertPos = 0; 2093 if (FunctionNoProtoType *FT = 2094 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 2095 return QualType(FT, 0); 2096 2097 QualType Canonical; 2098 if (!ResultTy.isCanonical() || 2099 getCanonicalCallConv(CallConv) != CallConv) { 2100 Canonical = 2101 getFunctionNoProtoType(getCanonicalType(ResultTy), 2102 Info.withCallingConv(getCanonicalCallConv(CallConv))); 2103 2104 // Get the new insert position for the node we care about. 2105 FunctionNoProtoType *NewIP = 2106 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 2107 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 2108 } 2109 2110 FunctionProtoType::ExtInfo newInfo = Info.withCallingConv(CallConv); 2111 FunctionNoProtoType *New = new (*this, TypeAlignment) 2112 FunctionNoProtoType(ResultTy, Canonical, newInfo); 2113 Types.push_back(New); 2114 FunctionNoProtoTypes.InsertNode(New, InsertPos); 2115 return QualType(New, 0); 2116} 2117 2118/// getFunctionType - Return a normal function type with a typed argument 2119/// list. isVariadic indicates whether the argument list includes '...'. 2120QualType 2121ASTContext::getFunctionType(QualType ResultTy, 2122 const QualType *ArgArray, unsigned NumArgs, 2123 const FunctionProtoType::ExtProtoInfo &EPI) const { 2124 // Unique functions, to guarantee there is only one function of a particular 2125 // structure. 2126 llvm::FoldingSetNodeID ID; 2127 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, EPI, *this); 2128 2129 void *InsertPos = 0; 2130 if (FunctionProtoType *FTP = 2131 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 2132 return QualType(FTP, 0); 2133 2134 // Determine whether the type being created is already canonical or not. 2135 bool isCanonical= EPI.ExceptionSpecType == EST_None && ResultTy.isCanonical(); 2136 for (unsigned i = 0; i != NumArgs && isCanonical; ++i) 2137 if (!ArgArray[i].isCanonicalAsParam()) 2138 isCanonical = false; 2139 2140 const CallingConv DefaultCC = EPI.ExtInfo.getCC(); 2141 const CallingConv CallConv = (LangOpts.MRTD && DefaultCC == CC_Default) ? 2142 CC_X86StdCall : DefaultCC; 2143 2144 // If this type isn't canonical, get the canonical version of it. 2145 // The exception spec is not part of the canonical type. 2146 QualType Canonical; 2147 if (!isCanonical || getCanonicalCallConv(CallConv) != CallConv) { 2148 SmallVector<QualType, 16> CanonicalArgs; 2149 CanonicalArgs.reserve(NumArgs); 2150 for (unsigned i = 0; i != NumArgs; ++i) 2151 CanonicalArgs.push_back(getCanonicalParamType(ArgArray[i])); 2152 2153 FunctionProtoType::ExtProtoInfo CanonicalEPI = EPI; 2154 CanonicalEPI.ExceptionSpecType = EST_None; 2155 CanonicalEPI.NumExceptions = 0; 2156 CanonicalEPI.ExtInfo 2157 = CanonicalEPI.ExtInfo.withCallingConv(getCanonicalCallConv(CallConv)); 2158 2159 Canonical = getFunctionType(getCanonicalType(ResultTy), 2160 CanonicalArgs.data(), NumArgs, 2161 CanonicalEPI); 2162 2163 // Get the new insert position for the node we care about. 2164 FunctionProtoType *NewIP = 2165 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 2166 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 2167 } 2168 2169 // FunctionProtoType objects are allocated with extra bytes after 2170 // them for three variable size arrays at the end: 2171 // - parameter types 2172 // - exception types 2173 // - consumed-arguments flags 2174 // Instead of the exception types, there could be a noexcept 2175 // expression. 2176 size_t Size = sizeof(FunctionProtoType) + 2177 NumArgs * sizeof(QualType); 2178 if (EPI.ExceptionSpecType == EST_Dynamic) 2179 Size += EPI.NumExceptions * sizeof(QualType); 2180 else if (EPI.ExceptionSpecType == EST_ComputedNoexcept) { 2181 Size += sizeof(Expr*); 2182 } 2183 if (EPI.ConsumedArguments) 2184 Size += NumArgs * sizeof(bool); 2185 2186 FunctionProtoType *FTP = (FunctionProtoType*) Allocate(Size, TypeAlignment); 2187 FunctionProtoType::ExtProtoInfo newEPI = EPI; 2188 newEPI.ExtInfo = EPI.ExtInfo.withCallingConv(CallConv); 2189 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, Canonical, newEPI); 2190 Types.push_back(FTP); 2191 FunctionProtoTypes.InsertNode(FTP, InsertPos); 2192 return QualType(FTP, 0); 2193} 2194 2195#ifndef NDEBUG 2196static bool NeedsInjectedClassNameType(const RecordDecl *D) { 2197 if (!isa<CXXRecordDecl>(D)) return false; 2198 const CXXRecordDecl *RD = cast<CXXRecordDecl>(D); 2199 if (isa<ClassTemplatePartialSpecializationDecl>(RD)) 2200 return true; 2201 if (RD->getDescribedClassTemplate() && 2202 !isa<ClassTemplateSpecializationDecl>(RD)) 2203 return true; 2204 return false; 2205} 2206#endif 2207 2208/// getInjectedClassNameType - Return the unique reference to the 2209/// injected class name type for the specified templated declaration. 2210QualType ASTContext::getInjectedClassNameType(CXXRecordDecl *Decl, 2211 QualType TST) const { 2212 assert(NeedsInjectedClassNameType(Decl)); 2213 if (Decl->TypeForDecl) { 2214 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 2215 } else if (CXXRecordDecl *PrevDecl = Decl->getPreviousDecl()) { 2216 assert(PrevDecl->TypeForDecl && "previous declaration has no type"); 2217 Decl->TypeForDecl = PrevDecl->TypeForDecl; 2218 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 2219 } else { 2220 Type *newType = 2221 new (*this, TypeAlignment) InjectedClassNameType(Decl, TST); 2222 Decl->TypeForDecl = newType; 2223 Types.push_back(newType); 2224 } 2225 return QualType(Decl->TypeForDecl, 0); 2226} 2227 2228/// getTypeDeclType - Return the unique reference to the type for the 2229/// specified type declaration. 2230QualType ASTContext::getTypeDeclTypeSlow(const TypeDecl *Decl) const { 2231 assert(Decl && "Passed null for Decl param"); 2232 assert(!Decl->TypeForDecl && "TypeForDecl present in slow case"); 2233 2234 if (const TypedefNameDecl *Typedef = dyn_cast<TypedefNameDecl>(Decl)) 2235 return getTypedefType(Typedef); 2236 2237 assert(!isa<TemplateTypeParmDecl>(Decl) && 2238 "Template type parameter types are always available."); 2239 2240 if (const RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) { 2241 assert(!Record->getPreviousDecl() && 2242 "struct/union has previous declaration"); 2243 assert(!NeedsInjectedClassNameType(Record)); 2244 return getRecordType(Record); 2245 } else if (const EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) { 2246 assert(!Enum->getPreviousDecl() && 2247 "enum has previous declaration"); 2248 return getEnumType(Enum); 2249 } else if (const UnresolvedUsingTypenameDecl *Using = 2250 dyn_cast<UnresolvedUsingTypenameDecl>(Decl)) { 2251 Type *newType = new (*this, TypeAlignment) UnresolvedUsingType(Using); 2252 Decl->TypeForDecl = newType; 2253 Types.push_back(newType); 2254 } else 2255 llvm_unreachable("TypeDecl without a type?"); 2256 2257 return QualType(Decl->TypeForDecl, 0); 2258} 2259 2260/// getTypedefType - Return the unique reference to the type for the 2261/// specified typedef name decl. 2262QualType 2263ASTContext::getTypedefType(const TypedefNameDecl *Decl, 2264 QualType Canonical) const { 2265 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2266 2267 if (Canonical.isNull()) 2268 Canonical = getCanonicalType(Decl->getUnderlyingType()); 2269 TypedefType *newType = new(*this, TypeAlignment) 2270 TypedefType(Type::Typedef, Decl, Canonical); 2271 Decl->TypeForDecl = newType; 2272 Types.push_back(newType); 2273 return QualType(newType, 0); 2274} 2275 2276QualType ASTContext::getRecordType(const RecordDecl *Decl) const { 2277 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2278 2279 if (const RecordDecl *PrevDecl = Decl->getPreviousDecl()) 2280 if (PrevDecl->TypeForDecl) 2281 return QualType(Decl->TypeForDecl = PrevDecl->TypeForDecl, 0); 2282 2283 RecordType *newType = new (*this, TypeAlignment) RecordType(Decl); 2284 Decl->TypeForDecl = newType; 2285 Types.push_back(newType); 2286 return QualType(newType, 0); 2287} 2288 2289QualType ASTContext::getEnumType(const EnumDecl *Decl) const { 2290 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2291 2292 if (const EnumDecl *PrevDecl = Decl->getPreviousDecl()) 2293 if (PrevDecl->TypeForDecl) 2294 return QualType(Decl->TypeForDecl = PrevDecl->TypeForDecl, 0); 2295 2296 EnumType *newType = new (*this, TypeAlignment) EnumType(Decl); 2297 Decl->TypeForDecl = newType; 2298 Types.push_back(newType); 2299 return QualType(newType, 0); 2300} 2301 2302QualType ASTContext::getAttributedType(AttributedType::Kind attrKind, 2303 QualType modifiedType, 2304 QualType equivalentType) { 2305 llvm::FoldingSetNodeID id; 2306 AttributedType::Profile(id, attrKind, modifiedType, equivalentType); 2307 2308 void *insertPos = 0; 2309 AttributedType *type = AttributedTypes.FindNodeOrInsertPos(id, insertPos); 2310 if (type) return QualType(type, 0); 2311 2312 QualType canon = getCanonicalType(equivalentType); 2313 type = new (*this, TypeAlignment) 2314 AttributedType(canon, attrKind, modifiedType, equivalentType); 2315 2316 Types.push_back(type); 2317 AttributedTypes.InsertNode(type, insertPos); 2318 2319 return QualType(type, 0); 2320} 2321 2322 2323/// \brief Retrieve a substitution-result type. 2324QualType 2325ASTContext::getSubstTemplateTypeParmType(const TemplateTypeParmType *Parm, 2326 QualType Replacement) const { 2327 assert(Replacement.isCanonical() 2328 && "replacement types must always be canonical"); 2329 2330 llvm::FoldingSetNodeID ID; 2331 SubstTemplateTypeParmType::Profile(ID, Parm, Replacement); 2332 void *InsertPos = 0; 2333 SubstTemplateTypeParmType *SubstParm 2334 = SubstTemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2335 2336 if (!SubstParm) { 2337 SubstParm = new (*this, TypeAlignment) 2338 SubstTemplateTypeParmType(Parm, Replacement); 2339 Types.push_back(SubstParm); 2340 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 2341 } 2342 2343 return QualType(SubstParm, 0); 2344} 2345 2346/// \brief Retrieve a 2347QualType ASTContext::getSubstTemplateTypeParmPackType( 2348 const TemplateTypeParmType *Parm, 2349 const TemplateArgument &ArgPack) { 2350#ifndef NDEBUG 2351 for (TemplateArgument::pack_iterator P = ArgPack.pack_begin(), 2352 PEnd = ArgPack.pack_end(); 2353 P != PEnd; ++P) { 2354 assert(P->getKind() == TemplateArgument::Type &&"Pack contains a non-type"); 2355 assert(P->getAsType().isCanonical() && "Pack contains non-canonical type"); 2356 } 2357#endif 2358 2359 llvm::FoldingSetNodeID ID; 2360 SubstTemplateTypeParmPackType::Profile(ID, Parm, ArgPack); 2361 void *InsertPos = 0; 2362 if (SubstTemplateTypeParmPackType *SubstParm 2363 = SubstTemplateTypeParmPackTypes.FindNodeOrInsertPos(ID, InsertPos)) 2364 return QualType(SubstParm, 0); 2365 2366 QualType Canon; 2367 if (!Parm->isCanonicalUnqualified()) { 2368 Canon = getCanonicalType(QualType(Parm, 0)); 2369 Canon = getSubstTemplateTypeParmPackType(cast<TemplateTypeParmType>(Canon), 2370 ArgPack); 2371 SubstTemplateTypeParmPackTypes.FindNodeOrInsertPos(ID, InsertPos); 2372 } 2373 2374 SubstTemplateTypeParmPackType *SubstParm 2375 = new (*this, TypeAlignment) SubstTemplateTypeParmPackType(Parm, Canon, 2376 ArgPack); 2377 Types.push_back(SubstParm); 2378 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 2379 return QualType(SubstParm, 0); 2380} 2381 2382/// \brief Retrieve the template type parameter type for a template 2383/// parameter or parameter pack with the given depth, index, and (optionally) 2384/// name. 2385QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index, 2386 bool ParameterPack, 2387 TemplateTypeParmDecl *TTPDecl) const { 2388 llvm::FoldingSetNodeID ID; 2389 TemplateTypeParmType::Profile(ID, Depth, Index, ParameterPack, TTPDecl); 2390 void *InsertPos = 0; 2391 TemplateTypeParmType *TypeParm 2392 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2393 2394 if (TypeParm) 2395 return QualType(TypeParm, 0); 2396 2397 if (TTPDecl) { 2398 QualType Canon = getTemplateTypeParmType(Depth, Index, ParameterPack); 2399 TypeParm = new (*this, TypeAlignment) TemplateTypeParmType(TTPDecl, Canon); 2400 2401 TemplateTypeParmType *TypeCheck 2402 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2403 assert(!TypeCheck && "Template type parameter canonical type broken"); 2404 (void)TypeCheck; 2405 } else 2406 TypeParm = new (*this, TypeAlignment) 2407 TemplateTypeParmType(Depth, Index, ParameterPack); 2408 2409 Types.push_back(TypeParm); 2410 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos); 2411 2412 return QualType(TypeParm, 0); 2413} 2414 2415TypeSourceInfo * 2416ASTContext::getTemplateSpecializationTypeInfo(TemplateName Name, 2417 SourceLocation NameLoc, 2418 const TemplateArgumentListInfo &Args, 2419 QualType Underlying) const { 2420 assert(!Name.getAsDependentTemplateName() && 2421 "No dependent template names here!"); 2422 QualType TST = getTemplateSpecializationType(Name, Args, Underlying); 2423 2424 TypeSourceInfo *DI = CreateTypeSourceInfo(TST); 2425 TemplateSpecializationTypeLoc TL 2426 = cast<TemplateSpecializationTypeLoc>(DI->getTypeLoc()); 2427 TL.setTemplateKeywordLoc(SourceLocation()); 2428 TL.setTemplateNameLoc(NameLoc); 2429 TL.setLAngleLoc(Args.getLAngleLoc()); 2430 TL.setRAngleLoc(Args.getRAngleLoc()); 2431 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 2432 TL.setArgLocInfo(i, Args[i].getLocInfo()); 2433 return DI; 2434} 2435 2436QualType 2437ASTContext::getTemplateSpecializationType(TemplateName Template, 2438 const TemplateArgumentListInfo &Args, 2439 QualType Underlying) const { 2440 assert(!Template.getAsDependentTemplateName() && 2441 "No dependent template names here!"); 2442 2443 unsigned NumArgs = Args.size(); 2444 2445 SmallVector<TemplateArgument, 4> ArgVec; 2446 ArgVec.reserve(NumArgs); 2447 for (unsigned i = 0; i != NumArgs; ++i) 2448 ArgVec.push_back(Args[i].getArgument()); 2449 2450 return getTemplateSpecializationType(Template, ArgVec.data(), NumArgs, 2451 Underlying); 2452} 2453 2454#ifndef NDEBUG 2455static bool hasAnyPackExpansions(const TemplateArgument *Args, 2456 unsigned NumArgs) { 2457 for (unsigned I = 0; I != NumArgs; ++I) 2458 if (Args[I].isPackExpansion()) 2459 return true; 2460 2461 return true; 2462} 2463#endif 2464 2465QualType 2466ASTContext::getTemplateSpecializationType(TemplateName Template, 2467 const TemplateArgument *Args, 2468 unsigned NumArgs, 2469 QualType Underlying) const { 2470 assert(!Template.getAsDependentTemplateName() && 2471 "No dependent template names here!"); 2472 // Look through qualified template names. 2473 if (QualifiedTemplateName *QTN = Template.getAsQualifiedTemplateName()) 2474 Template = TemplateName(QTN->getTemplateDecl()); 2475 2476 bool IsTypeAlias = 2477 Template.getAsTemplateDecl() && 2478 isa<TypeAliasTemplateDecl>(Template.getAsTemplateDecl()); 2479 QualType CanonType; 2480 if (!Underlying.isNull()) 2481 CanonType = getCanonicalType(Underlying); 2482 else { 2483 // We can get here with an alias template when the specialization contains 2484 // a pack expansion that does not match up with a parameter pack. 2485 assert((!IsTypeAlias || hasAnyPackExpansions(Args, NumArgs)) && 2486 "Caller must compute aliased type"); 2487 IsTypeAlias = false; 2488 CanonType = getCanonicalTemplateSpecializationType(Template, Args, 2489 NumArgs); 2490 } 2491 2492 // Allocate the (non-canonical) template specialization type, but don't 2493 // try to unique it: these types typically have location information that 2494 // we don't unique and don't want to lose. 2495 void *Mem = Allocate(sizeof(TemplateSpecializationType) + 2496 sizeof(TemplateArgument) * NumArgs + 2497 (IsTypeAlias? sizeof(QualType) : 0), 2498 TypeAlignment); 2499 TemplateSpecializationType *Spec 2500 = new (Mem) TemplateSpecializationType(Template, Args, NumArgs, CanonType, 2501 IsTypeAlias ? Underlying : QualType()); 2502 2503 Types.push_back(Spec); 2504 return QualType(Spec, 0); 2505} 2506 2507QualType 2508ASTContext::getCanonicalTemplateSpecializationType(TemplateName Template, 2509 const TemplateArgument *Args, 2510 unsigned NumArgs) const { 2511 assert(!Template.getAsDependentTemplateName() && 2512 "No dependent template names here!"); 2513 2514 // Look through qualified template names. 2515 if (QualifiedTemplateName *QTN = Template.getAsQualifiedTemplateName()) 2516 Template = TemplateName(QTN->getTemplateDecl()); 2517 2518 // Build the canonical template specialization type. 2519 TemplateName CanonTemplate = getCanonicalTemplateName(Template); 2520 SmallVector<TemplateArgument, 4> CanonArgs; 2521 CanonArgs.reserve(NumArgs); 2522 for (unsigned I = 0; I != NumArgs; ++I) 2523 CanonArgs.push_back(getCanonicalTemplateArgument(Args[I])); 2524 2525 // Determine whether this canonical template specialization type already 2526 // exists. 2527 llvm::FoldingSetNodeID ID; 2528 TemplateSpecializationType::Profile(ID, CanonTemplate, 2529 CanonArgs.data(), NumArgs, *this); 2530 2531 void *InsertPos = 0; 2532 TemplateSpecializationType *Spec 2533 = TemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2534 2535 if (!Spec) { 2536 // Allocate a new canonical template specialization type. 2537 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 2538 sizeof(TemplateArgument) * NumArgs), 2539 TypeAlignment); 2540 Spec = new (Mem) TemplateSpecializationType(CanonTemplate, 2541 CanonArgs.data(), NumArgs, 2542 QualType(), QualType()); 2543 Types.push_back(Spec); 2544 TemplateSpecializationTypes.InsertNode(Spec, InsertPos); 2545 } 2546 2547 assert(Spec->isDependentType() && 2548 "Non-dependent template-id type must have a canonical type"); 2549 return QualType(Spec, 0); 2550} 2551 2552QualType 2553ASTContext::getElaboratedType(ElaboratedTypeKeyword Keyword, 2554 NestedNameSpecifier *NNS, 2555 QualType NamedType) const { 2556 llvm::FoldingSetNodeID ID; 2557 ElaboratedType::Profile(ID, Keyword, NNS, NamedType); 2558 2559 void *InsertPos = 0; 2560 ElaboratedType *T = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2561 if (T) 2562 return QualType(T, 0); 2563 2564 QualType Canon = NamedType; 2565 if (!Canon.isCanonical()) { 2566 Canon = getCanonicalType(NamedType); 2567 ElaboratedType *CheckT = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2568 assert(!CheckT && "Elaborated canonical type broken"); 2569 (void)CheckT; 2570 } 2571 2572 T = new (*this) ElaboratedType(Keyword, NNS, NamedType, Canon); 2573 Types.push_back(T); 2574 ElaboratedTypes.InsertNode(T, InsertPos); 2575 return QualType(T, 0); 2576} 2577 2578QualType 2579ASTContext::getParenType(QualType InnerType) const { 2580 llvm::FoldingSetNodeID ID; 2581 ParenType::Profile(ID, InnerType); 2582 2583 void *InsertPos = 0; 2584 ParenType *T = ParenTypes.FindNodeOrInsertPos(ID, InsertPos); 2585 if (T) 2586 return QualType(T, 0); 2587 2588 QualType Canon = InnerType; 2589 if (!Canon.isCanonical()) { 2590 Canon = getCanonicalType(InnerType); 2591 ParenType *CheckT = ParenTypes.FindNodeOrInsertPos(ID, InsertPos); 2592 assert(!CheckT && "Paren canonical type broken"); 2593 (void)CheckT; 2594 } 2595 2596 T = new (*this) ParenType(InnerType, Canon); 2597 Types.push_back(T); 2598 ParenTypes.InsertNode(T, InsertPos); 2599 return QualType(T, 0); 2600} 2601 2602QualType ASTContext::getDependentNameType(ElaboratedTypeKeyword Keyword, 2603 NestedNameSpecifier *NNS, 2604 const IdentifierInfo *Name, 2605 QualType Canon) const { 2606 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 2607 2608 if (Canon.isNull()) { 2609 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2610 ElaboratedTypeKeyword CanonKeyword = Keyword; 2611 if (Keyword == ETK_None) 2612 CanonKeyword = ETK_Typename; 2613 2614 if (CanonNNS != NNS || CanonKeyword != Keyword) 2615 Canon = getDependentNameType(CanonKeyword, CanonNNS, Name); 2616 } 2617 2618 llvm::FoldingSetNodeID ID; 2619 DependentNameType::Profile(ID, Keyword, NNS, Name); 2620 2621 void *InsertPos = 0; 2622 DependentNameType *T 2623 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 2624 if (T) 2625 return QualType(T, 0); 2626 2627 T = new (*this) DependentNameType(Keyword, NNS, Name, Canon); 2628 Types.push_back(T); 2629 DependentNameTypes.InsertNode(T, InsertPos); 2630 return QualType(T, 0); 2631} 2632 2633QualType 2634ASTContext::getDependentTemplateSpecializationType( 2635 ElaboratedTypeKeyword Keyword, 2636 NestedNameSpecifier *NNS, 2637 const IdentifierInfo *Name, 2638 const TemplateArgumentListInfo &Args) const { 2639 // TODO: avoid this copy 2640 SmallVector<TemplateArgument, 16> ArgCopy; 2641 for (unsigned I = 0, E = Args.size(); I != E; ++I) 2642 ArgCopy.push_back(Args[I].getArgument()); 2643 return getDependentTemplateSpecializationType(Keyword, NNS, Name, 2644 ArgCopy.size(), 2645 ArgCopy.data()); 2646} 2647 2648QualType 2649ASTContext::getDependentTemplateSpecializationType( 2650 ElaboratedTypeKeyword Keyword, 2651 NestedNameSpecifier *NNS, 2652 const IdentifierInfo *Name, 2653 unsigned NumArgs, 2654 const TemplateArgument *Args) const { 2655 assert((!NNS || NNS->isDependent()) && 2656 "nested-name-specifier must be dependent"); 2657 2658 llvm::FoldingSetNodeID ID; 2659 DependentTemplateSpecializationType::Profile(ID, *this, Keyword, NNS, 2660 Name, NumArgs, Args); 2661 2662 void *InsertPos = 0; 2663 DependentTemplateSpecializationType *T 2664 = DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2665 if (T) 2666 return QualType(T, 0); 2667 2668 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2669 2670 ElaboratedTypeKeyword CanonKeyword = Keyword; 2671 if (Keyword == ETK_None) CanonKeyword = ETK_Typename; 2672 2673 bool AnyNonCanonArgs = false; 2674 SmallVector<TemplateArgument, 16> CanonArgs(NumArgs); 2675 for (unsigned I = 0; I != NumArgs; ++I) { 2676 CanonArgs[I] = getCanonicalTemplateArgument(Args[I]); 2677 if (!CanonArgs[I].structurallyEquals(Args[I])) 2678 AnyNonCanonArgs = true; 2679 } 2680 2681 QualType Canon; 2682 if (AnyNonCanonArgs || CanonNNS != NNS || CanonKeyword != Keyword) { 2683 Canon = getDependentTemplateSpecializationType(CanonKeyword, CanonNNS, 2684 Name, NumArgs, 2685 CanonArgs.data()); 2686 2687 // Find the insert position again. 2688 DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2689 } 2690 2691 void *Mem = Allocate((sizeof(DependentTemplateSpecializationType) + 2692 sizeof(TemplateArgument) * NumArgs), 2693 TypeAlignment); 2694 T = new (Mem) DependentTemplateSpecializationType(Keyword, NNS, 2695 Name, NumArgs, Args, Canon); 2696 Types.push_back(T); 2697 DependentTemplateSpecializationTypes.InsertNode(T, InsertPos); 2698 return QualType(T, 0); 2699} 2700 2701QualType ASTContext::getPackExpansionType(QualType Pattern, 2702 llvm::Optional<unsigned> NumExpansions) { 2703 llvm::FoldingSetNodeID ID; 2704 PackExpansionType::Profile(ID, Pattern, NumExpansions); 2705 2706 assert(Pattern->containsUnexpandedParameterPack() && 2707 "Pack expansions must expand one or more parameter packs"); 2708 void *InsertPos = 0; 2709 PackExpansionType *T 2710 = PackExpansionTypes.FindNodeOrInsertPos(ID, InsertPos); 2711 if (T) 2712 return QualType(T, 0); 2713 2714 QualType Canon; 2715 if (!Pattern.isCanonical()) { 2716 Canon = getPackExpansionType(getCanonicalType(Pattern), NumExpansions); 2717 2718 // Find the insert position again. 2719 PackExpansionTypes.FindNodeOrInsertPos(ID, InsertPos); 2720 } 2721 2722 T = new (*this) PackExpansionType(Pattern, Canon, NumExpansions); 2723 Types.push_back(T); 2724 PackExpansionTypes.InsertNode(T, InsertPos); 2725 return QualType(T, 0); 2726} 2727 2728/// CmpProtocolNames - Comparison predicate for sorting protocols 2729/// alphabetically. 2730static bool CmpProtocolNames(const ObjCProtocolDecl *LHS, 2731 const ObjCProtocolDecl *RHS) { 2732 return LHS->getDeclName() < RHS->getDeclName(); 2733} 2734 2735static bool areSortedAndUniqued(ObjCProtocolDecl * const *Protocols, 2736 unsigned NumProtocols) { 2737 if (NumProtocols == 0) return true; 2738 2739 if (Protocols[0]->getCanonicalDecl() != Protocols[0]) 2740 return false; 2741 2742 for (unsigned i = 1; i != NumProtocols; ++i) 2743 if (!CmpProtocolNames(Protocols[i-1], Protocols[i]) || 2744 Protocols[i]->getCanonicalDecl() != Protocols[i]) 2745 return false; 2746 return true; 2747} 2748 2749static void SortAndUniqueProtocols(ObjCProtocolDecl **Protocols, 2750 unsigned &NumProtocols) { 2751 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols; 2752 2753 // Sort protocols, keyed by name. 2754 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames); 2755 2756 // Canonicalize. 2757 for (unsigned I = 0, N = NumProtocols; I != N; ++I) 2758 Protocols[I] = Protocols[I]->getCanonicalDecl(); 2759 2760 // Remove duplicates. 2761 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd); 2762 NumProtocols = ProtocolsEnd-Protocols; 2763} 2764 2765QualType ASTContext::getObjCObjectType(QualType BaseType, 2766 ObjCProtocolDecl * const *Protocols, 2767 unsigned NumProtocols) const { 2768 // If the base type is an interface and there aren't any protocols 2769 // to add, then the interface type will do just fine. 2770 if (!NumProtocols && isa<ObjCInterfaceType>(BaseType)) 2771 return BaseType; 2772 2773 // Look in the folding set for an existing type. 2774 llvm::FoldingSetNodeID ID; 2775 ObjCObjectTypeImpl::Profile(ID, BaseType, Protocols, NumProtocols); 2776 void *InsertPos = 0; 2777 if (ObjCObjectType *QT = ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos)) 2778 return QualType(QT, 0); 2779 2780 // Build the canonical type, which has the canonical base type and 2781 // a sorted-and-uniqued list of protocols. 2782 QualType Canonical; 2783 bool ProtocolsSorted = areSortedAndUniqued(Protocols, NumProtocols); 2784 if (!ProtocolsSorted || !BaseType.isCanonical()) { 2785 if (!ProtocolsSorted) { 2786 SmallVector<ObjCProtocolDecl*, 8> Sorted(Protocols, 2787 Protocols + NumProtocols); 2788 unsigned UniqueCount = NumProtocols; 2789 2790 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2791 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2792 &Sorted[0], UniqueCount); 2793 } else { 2794 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2795 Protocols, NumProtocols); 2796 } 2797 2798 // Regenerate InsertPos. 2799 ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos); 2800 } 2801 2802 unsigned Size = sizeof(ObjCObjectTypeImpl); 2803 Size += NumProtocols * sizeof(ObjCProtocolDecl *); 2804 void *Mem = Allocate(Size, TypeAlignment); 2805 ObjCObjectTypeImpl *T = 2806 new (Mem) ObjCObjectTypeImpl(Canonical, BaseType, Protocols, NumProtocols); 2807 2808 Types.push_back(T); 2809 ObjCObjectTypes.InsertNode(T, InsertPos); 2810 return QualType(T, 0); 2811} 2812 2813/// getObjCObjectPointerType - Return a ObjCObjectPointerType type for 2814/// the given object type. 2815QualType ASTContext::getObjCObjectPointerType(QualType ObjectT) const { 2816 llvm::FoldingSetNodeID ID; 2817 ObjCObjectPointerType::Profile(ID, ObjectT); 2818 2819 void *InsertPos = 0; 2820 if (ObjCObjectPointerType *QT = 2821 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 2822 return QualType(QT, 0); 2823 2824 // Find the canonical object type. 2825 QualType Canonical; 2826 if (!ObjectT.isCanonical()) { 2827 Canonical = getObjCObjectPointerType(getCanonicalType(ObjectT)); 2828 2829 // Regenerate InsertPos. 2830 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 2831 } 2832 2833 // No match. 2834 void *Mem = Allocate(sizeof(ObjCObjectPointerType), TypeAlignment); 2835 ObjCObjectPointerType *QType = 2836 new (Mem) ObjCObjectPointerType(Canonical, ObjectT); 2837 2838 Types.push_back(QType); 2839 ObjCObjectPointerTypes.InsertNode(QType, InsertPos); 2840 return QualType(QType, 0); 2841} 2842 2843/// getObjCInterfaceType - Return the unique reference to the type for the 2844/// specified ObjC interface decl. The list of protocols is optional. 2845QualType ASTContext::getObjCInterfaceType(const ObjCInterfaceDecl *Decl, 2846 ObjCInterfaceDecl *PrevDecl) const { 2847 if (Decl->TypeForDecl) 2848 return QualType(Decl->TypeForDecl, 0); 2849 2850 if (PrevDecl) { 2851 assert(PrevDecl->TypeForDecl && "previous decl has no TypeForDecl"); 2852 Decl->TypeForDecl = PrevDecl->TypeForDecl; 2853 return QualType(PrevDecl->TypeForDecl, 0); 2854 } 2855 2856 // Prefer the definition, if there is one. 2857 if (const ObjCInterfaceDecl *Def = Decl->getDefinition()) 2858 Decl = Def; 2859 2860 void *Mem = Allocate(sizeof(ObjCInterfaceType), TypeAlignment); 2861 ObjCInterfaceType *T = new (Mem) ObjCInterfaceType(Decl); 2862 Decl->TypeForDecl = T; 2863 Types.push_back(T); 2864 return QualType(T, 0); 2865} 2866 2867/// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique 2868/// TypeOfExprType AST's (since expression's are never shared). For example, 2869/// multiple declarations that refer to "typeof(x)" all contain different 2870/// DeclRefExpr's. This doesn't effect the type checker, since it operates 2871/// on canonical type's (which are always unique). 2872QualType ASTContext::getTypeOfExprType(Expr *tofExpr) const { 2873 TypeOfExprType *toe; 2874 if (tofExpr->isTypeDependent()) { 2875 llvm::FoldingSetNodeID ID; 2876 DependentTypeOfExprType::Profile(ID, *this, tofExpr); 2877 2878 void *InsertPos = 0; 2879 DependentTypeOfExprType *Canon 2880 = DependentTypeOfExprTypes.FindNodeOrInsertPos(ID, InsertPos); 2881 if (Canon) { 2882 // We already have a "canonical" version of an identical, dependent 2883 // typeof(expr) type. Use that as our canonical type. 2884 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, 2885 QualType((TypeOfExprType*)Canon, 0)); 2886 } else { 2887 // Build a new, canonical typeof(expr) type. 2888 Canon 2889 = new (*this, TypeAlignment) DependentTypeOfExprType(*this, tofExpr); 2890 DependentTypeOfExprTypes.InsertNode(Canon, InsertPos); 2891 toe = Canon; 2892 } 2893 } else { 2894 QualType Canonical = getCanonicalType(tofExpr->getType()); 2895 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, Canonical); 2896 } 2897 Types.push_back(toe); 2898 return QualType(toe, 0); 2899} 2900 2901/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique 2902/// TypeOfType AST's. The only motivation to unique these nodes would be 2903/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be 2904/// an issue. This doesn't effect the type checker, since it operates 2905/// on canonical type's (which are always unique). 2906QualType ASTContext::getTypeOfType(QualType tofType) const { 2907 QualType Canonical = getCanonicalType(tofType); 2908 TypeOfType *tot = new (*this, TypeAlignment) TypeOfType(tofType, Canonical); 2909 Types.push_back(tot); 2910 return QualType(tot, 0); 2911} 2912 2913/// getDecltypeForExpr - Given an expr, will return the decltype for that 2914/// expression, according to the rules in C++0x [dcl.type.simple]p4 2915static QualType getDecltypeForExpr(const Expr *e, const ASTContext &Context) { 2916 if (e->isTypeDependent()) 2917 return Context.DependentTy; 2918 2919 // If e is an id expression or a class member access, decltype(e) is defined 2920 // as the type of the entity named by e. 2921 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(e)) { 2922 if (const ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl())) 2923 return VD->getType(); 2924 } 2925 if (const MemberExpr *ME = dyn_cast<MemberExpr>(e)) { 2926 if (const FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) 2927 return FD->getType(); 2928 } 2929 // If e is a function call or an invocation of an overloaded operator, 2930 // (parentheses around e are ignored), decltype(e) is defined as the 2931 // return type of that function. 2932 if (const CallExpr *CE = dyn_cast<CallExpr>(e->IgnoreParens())) 2933 return CE->getCallReturnType(); 2934 2935 QualType T = e->getType(); 2936 2937 // Otherwise, where T is the type of e, if e is an lvalue, decltype(e) is 2938 // defined as T&, otherwise decltype(e) is defined as T. 2939 if (e->isLValue()) 2940 T = Context.getLValueReferenceType(T); 2941 2942 return T; 2943} 2944 2945/// getDecltypeType - Unlike many "get<Type>" functions, we don't unique 2946/// DecltypeType AST's. The only motivation to unique these nodes would be 2947/// memory savings. Since decltype(t) is fairly uncommon, space shouldn't be 2948/// an issue. This doesn't effect the type checker, since it operates 2949/// on canonical types (which are always unique). 2950QualType ASTContext::getDecltypeType(Expr *e) const { 2951 DecltypeType *dt; 2952 2953 // C++0x [temp.type]p2: 2954 // If an expression e involves a template parameter, decltype(e) denotes a 2955 // unique dependent type. Two such decltype-specifiers refer to the same 2956 // type only if their expressions are equivalent (14.5.6.1). 2957 if (e->isInstantiationDependent()) { 2958 llvm::FoldingSetNodeID ID; 2959 DependentDecltypeType::Profile(ID, *this, e); 2960 2961 void *InsertPos = 0; 2962 DependentDecltypeType *Canon 2963 = DependentDecltypeTypes.FindNodeOrInsertPos(ID, InsertPos); 2964 if (Canon) { 2965 // We already have a "canonical" version of an equivalent, dependent 2966 // decltype type. Use that as our canonical type. 2967 dt = new (*this, TypeAlignment) DecltypeType(e, DependentTy, 2968 QualType((DecltypeType*)Canon, 0)); 2969 } else { 2970 // Build a new, canonical typeof(expr) type. 2971 Canon = new (*this, TypeAlignment) DependentDecltypeType(*this, e); 2972 DependentDecltypeTypes.InsertNode(Canon, InsertPos); 2973 dt = Canon; 2974 } 2975 } else { 2976 QualType T = getDecltypeForExpr(e, *this); 2977 dt = new (*this, TypeAlignment) DecltypeType(e, T, getCanonicalType(T)); 2978 } 2979 Types.push_back(dt); 2980 return QualType(dt, 0); 2981} 2982 2983/// getUnaryTransformationType - We don't unique these, since the memory 2984/// savings are minimal and these are rare. 2985QualType ASTContext::getUnaryTransformType(QualType BaseType, 2986 QualType UnderlyingType, 2987 UnaryTransformType::UTTKind Kind) 2988 const { 2989 UnaryTransformType *Ty = 2990 new (*this, TypeAlignment) UnaryTransformType (BaseType, UnderlyingType, 2991 Kind, 2992 UnderlyingType->isDependentType() ? 2993 QualType() : UnderlyingType); 2994 Types.push_back(Ty); 2995 return QualType(Ty, 0); 2996} 2997 2998/// getAutoType - We only unique auto types after they've been deduced. 2999QualType ASTContext::getAutoType(QualType DeducedType) const { 3000 void *InsertPos = 0; 3001 if (!DeducedType.isNull()) { 3002 // Look in the folding set for an existing type. 3003 llvm::FoldingSetNodeID ID; 3004 AutoType::Profile(ID, DeducedType); 3005 if (AutoType *AT = AutoTypes.FindNodeOrInsertPos(ID, InsertPos)) 3006 return QualType(AT, 0); 3007 } 3008 3009 AutoType *AT = new (*this, TypeAlignment) AutoType(DeducedType); 3010 Types.push_back(AT); 3011 if (InsertPos) 3012 AutoTypes.InsertNode(AT, InsertPos); 3013 return QualType(AT, 0); 3014} 3015 3016/// getAtomicType - Return the uniqued reference to the atomic type for 3017/// the given value type. 3018QualType ASTContext::getAtomicType(QualType T) const { 3019 // Unique pointers, to guarantee there is only one pointer of a particular 3020 // structure. 3021 llvm::FoldingSetNodeID ID; 3022 AtomicType::Profile(ID, T); 3023 3024 void *InsertPos = 0; 3025 if (AtomicType *AT = AtomicTypes.FindNodeOrInsertPos(ID, InsertPos)) 3026 return QualType(AT, 0); 3027 3028 // If the atomic value type isn't canonical, this won't be a canonical type 3029 // either, so fill in the canonical type field. 3030 QualType Canonical; 3031 if (!T.isCanonical()) { 3032 Canonical = getAtomicType(getCanonicalType(T)); 3033 3034 // Get the new insert position for the node we care about. 3035 AtomicType *NewIP = AtomicTypes.FindNodeOrInsertPos(ID, InsertPos); 3036 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 3037 } 3038 AtomicType *New = new (*this, TypeAlignment) AtomicType(T, Canonical); 3039 Types.push_back(New); 3040 AtomicTypes.InsertNode(New, InsertPos); 3041 return QualType(New, 0); 3042} 3043 3044/// getAutoDeductType - Get type pattern for deducing against 'auto'. 3045QualType ASTContext::getAutoDeductType() const { 3046 if (AutoDeductTy.isNull()) 3047 AutoDeductTy = getAutoType(QualType()); 3048 assert(!AutoDeductTy.isNull() && "can't build 'auto' pattern"); 3049 return AutoDeductTy; 3050} 3051 3052/// getAutoRRefDeductType - Get type pattern for deducing against 'auto &&'. 3053QualType ASTContext::getAutoRRefDeductType() const { 3054 if (AutoRRefDeductTy.isNull()) 3055 AutoRRefDeductTy = getRValueReferenceType(getAutoDeductType()); 3056 assert(!AutoRRefDeductTy.isNull() && "can't build 'auto &&' pattern"); 3057 return AutoRRefDeductTy; 3058} 3059 3060/// getTagDeclType - Return the unique reference to the type for the 3061/// specified TagDecl (struct/union/class/enum) decl. 3062QualType ASTContext::getTagDeclType(const TagDecl *Decl) const { 3063 assert (Decl); 3064 // FIXME: What is the design on getTagDeclType when it requires casting 3065 // away const? mutable? 3066 return getTypeDeclType(const_cast<TagDecl*>(Decl)); 3067} 3068 3069/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result 3070/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and 3071/// needs to agree with the definition in <stddef.h>. 3072CanQualType ASTContext::getSizeType() const { 3073 return getFromTargetType(Target->getSizeType()); 3074} 3075 3076/// getIntMaxType - Return the unique type for "intmax_t" (C99 7.18.1.5). 3077CanQualType ASTContext::getIntMaxType() const { 3078 return getFromTargetType(Target->getIntMaxType()); 3079} 3080 3081/// getUIntMaxType - Return the unique type for "uintmax_t" (C99 7.18.1.5). 3082CanQualType ASTContext::getUIntMaxType() const { 3083 return getFromTargetType(Target->getUIntMaxType()); 3084} 3085 3086/// getSignedWCharType - Return the type of "signed wchar_t". 3087/// Used when in C++, as a GCC extension. 3088QualType ASTContext::getSignedWCharType() const { 3089 // FIXME: derive from "Target" ? 3090 return WCharTy; 3091} 3092 3093/// getUnsignedWCharType - Return the type of "unsigned wchar_t". 3094/// Used when in C++, as a GCC extension. 3095QualType ASTContext::getUnsignedWCharType() const { 3096 // FIXME: derive from "Target" ? 3097 return UnsignedIntTy; 3098} 3099 3100/// getPointerDiffType - Return the unique type for "ptrdiff_t" (C99 7.17) 3101/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 3102QualType ASTContext::getPointerDiffType() const { 3103 return getFromTargetType(Target->getPtrDiffType(0)); 3104} 3105 3106//===----------------------------------------------------------------------===// 3107// Type Operators 3108//===----------------------------------------------------------------------===// 3109 3110CanQualType ASTContext::getCanonicalParamType(QualType T) const { 3111 // Push qualifiers into arrays, and then discard any remaining 3112 // qualifiers. 3113 T = getCanonicalType(T); 3114 T = getVariableArrayDecayedType(T); 3115 const Type *Ty = T.getTypePtr(); 3116 QualType Result; 3117 if (isa<ArrayType>(Ty)) { 3118 Result = getArrayDecayedType(QualType(Ty,0)); 3119 } else if (isa<FunctionType>(Ty)) { 3120 Result = getPointerType(QualType(Ty, 0)); 3121 } else { 3122 Result = QualType(Ty, 0); 3123 } 3124 3125 return CanQualType::CreateUnsafe(Result); 3126} 3127 3128QualType ASTContext::getUnqualifiedArrayType(QualType type, 3129 Qualifiers &quals) { 3130 SplitQualType splitType = type.getSplitUnqualifiedType(); 3131 3132 // FIXME: getSplitUnqualifiedType() actually walks all the way to 3133 // the unqualified desugared type and then drops it on the floor. 3134 // We then have to strip that sugar back off with 3135 // getUnqualifiedDesugaredType(), which is silly. 3136 const ArrayType *AT = 3137 dyn_cast<ArrayType>(splitType.first->getUnqualifiedDesugaredType()); 3138 3139 // If we don't have an array, just use the results in splitType. 3140 if (!AT) { 3141 quals = splitType.second; 3142 return QualType(splitType.first, 0); 3143 } 3144 3145 // Otherwise, recurse on the array's element type. 3146 QualType elementType = AT->getElementType(); 3147 QualType unqualElementType = getUnqualifiedArrayType(elementType, quals); 3148 3149 // If that didn't change the element type, AT has no qualifiers, so we 3150 // can just use the results in splitType. 3151 if (elementType == unqualElementType) { 3152 assert(quals.empty()); // from the recursive call 3153 quals = splitType.second; 3154 return QualType(splitType.first, 0); 3155 } 3156 3157 // Otherwise, add in the qualifiers from the outermost type, then 3158 // build the type back up. 3159 quals.addConsistentQualifiers(splitType.second); 3160 3161 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) { 3162 return getConstantArrayType(unqualElementType, CAT->getSize(), 3163 CAT->getSizeModifier(), 0); 3164 } 3165 3166 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) { 3167 return getIncompleteArrayType(unqualElementType, IAT->getSizeModifier(), 0); 3168 } 3169 3170 if (const VariableArrayType *VAT = dyn_cast<VariableArrayType>(AT)) { 3171 return getVariableArrayType(unqualElementType, 3172 VAT->getSizeExpr(), 3173 VAT->getSizeModifier(), 3174 VAT->getIndexTypeCVRQualifiers(), 3175 VAT->getBracketsRange()); 3176 } 3177 3178 const DependentSizedArrayType *DSAT = cast<DependentSizedArrayType>(AT); 3179 return getDependentSizedArrayType(unqualElementType, DSAT->getSizeExpr(), 3180 DSAT->getSizeModifier(), 0, 3181 SourceRange()); 3182} 3183 3184/// UnwrapSimilarPointerTypes - If T1 and T2 are pointer types that 3185/// may be similar (C++ 4.4), replaces T1 and T2 with the type that 3186/// they point to and return true. If T1 and T2 aren't pointer types 3187/// or pointer-to-member types, or if they are not similar at this 3188/// level, returns false and leaves T1 and T2 unchanged. Top-level 3189/// qualifiers on T1 and T2 are ignored. This function will typically 3190/// be called in a loop that successively "unwraps" pointer and 3191/// pointer-to-member types to compare them at each level. 3192bool ASTContext::UnwrapSimilarPointerTypes(QualType &T1, QualType &T2) { 3193 const PointerType *T1PtrType = T1->getAs<PointerType>(), 3194 *T2PtrType = T2->getAs<PointerType>(); 3195 if (T1PtrType && T2PtrType) { 3196 T1 = T1PtrType->getPointeeType(); 3197 T2 = T2PtrType->getPointeeType(); 3198 return true; 3199 } 3200 3201 const MemberPointerType *T1MPType = T1->getAs<MemberPointerType>(), 3202 *T2MPType = T2->getAs<MemberPointerType>(); 3203 if (T1MPType && T2MPType && 3204 hasSameUnqualifiedType(QualType(T1MPType->getClass(), 0), 3205 QualType(T2MPType->getClass(), 0))) { 3206 T1 = T1MPType->getPointeeType(); 3207 T2 = T2MPType->getPointeeType(); 3208 return true; 3209 } 3210 3211 if (getLangOptions().ObjC1) { 3212 const ObjCObjectPointerType *T1OPType = T1->getAs<ObjCObjectPointerType>(), 3213 *T2OPType = T2->getAs<ObjCObjectPointerType>(); 3214 if (T1OPType && T2OPType) { 3215 T1 = T1OPType->getPointeeType(); 3216 T2 = T2OPType->getPointeeType(); 3217 return true; 3218 } 3219 } 3220 3221 // FIXME: Block pointers, too? 3222 3223 return false; 3224} 3225 3226DeclarationNameInfo 3227ASTContext::getNameForTemplate(TemplateName Name, 3228 SourceLocation NameLoc) const { 3229 switch (Name.getKind()) { 3230 case TemplateName::QualifiedTemplate: 3231 case TemplateName::Template: 3232 // DNInfo work in progress: CHECKME: what about DNLoc? 3233 return DeclarationNameInfo(Name.getAsTemplateDecl()->getDeclName(), 3234 NameLoc); 3235 3236 case TemplateName::OverloadedTemplate: { 3237 OverloadedTemplateStorage *Storage = Name.getAsOverloadedTemplate(); 3238 // DNInfo work in progress: CHECKME: what about DNLoc? 3239 return DeclarationNameInfo((*Storage->begin())->getDeclName(), NameLoc); 3240 } 3241 3242 case TemplateName::DependentTemplate: { 3243 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 3244 DeclarationName DName; 3245 if (DTN->isIdentifier()) { 3246 DName = DeclarationNames.getIdentifier(DTN->getIdentifier()); 3247 return DeclarationNameInfo(DName, NameLoc); 3248 } else { 3249 DName = DeclarationNames.getCXXOperatorName(DTN->getOperator()); 3250 // DNInfo work in progress: FIXME: source locations? 3251 DeclarationNameLoc DNLoc; 3252 DNLoc.CXXOperatorName.BeginOpNameLoc = SourceLocation().getRawEncoding(); 3253 DNLoc.CXXOperatorName.EndOpNameLoc = SourceLocation().getRawEncoding(); 3254 return DeclarationNameInfo(DName, NameLoc, DNLoc); 3255 } 3256 } 3257 3258 case TemplateName::SubstTemplateTemplateParm: { 3259 SubstTemplateTemplateParmStorage *subst 3260 = Name.getAsSubstTemplateTemplateParm(); 3261 return DeclarationNameInfo(subst->getParameter()->getDeclName(), 3262 NameLoc); 3263 } 3264 3265 case TemplateName::SubstTemplateTemplateParmPack: { 3266 SubstTemplateTemplateParmPackStorage *subst 3267 = Name.getAsSubstTemplateTemplateParmPack(); 3268 return DeclarationNameInfo(subst->getParameterPack()->getDeclName(), 3269 NameLoc); 3270 } 3271 } 3272 3273 llvm_unreachable("bad template name kind!"); 3274} 3275 3276TemplateName ASTContext::getCanonicalTemplateName(TemplateName Name) const { 3277 switch (Name.getKind()) { 3278 case TemplateName::QualifiedTemplate: 3279 case TemplateName::Template: { 3280 TemplateDecl *Template = Name.getAsTemplateDecl(); 3281 if (TemplateTemplateParmDecl *TTP 3282 = dyn_cast<TemplateTemplateParmDecl>(Template)) 3283 Template = getCanonicalTemplateTemplateParmDecl(TTP); 3284 3285 // The canonical template name is the canonical template declaration. 3286 return TemplateName(cast<TemplateDecl>(Template->getCanonicalDecl())); 3287 } 3288 3289 case TemplateName::OverloadedTemplate: 3290 llvm_unreachable("cannot canonicalize overloaded template"); 3291 3292 case TemplateName::DependentTemplate: { 3293 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 3294 assert(DTN && "Non-dependent template names must refer to template decls."); 3295 return DTN->CanonicalTemplateName; 3296 } 3297 3298 case TemplateName::SubstTemplateTemplateParm: { 3299 SubstTemplateTemplateParmStorage *subst 3300 = Name.getAsSubstTemplateTemplateParm(); 3301 return getCanonicalTemplateName(subst->getReplacement()); 3302 } 3303 3304 case TemplateName::SubstTemplateTemplateParmPack: { 3305 SubstTemplateTemplateParmPackStorage *subst 3306 = Name.getAsSubstTemplateTemplateParmPack(); 3307 TemplateTemplateParmDecl *canonParameter 3308 = getCanonicalTemplateTemplateParmDecl(subst->getParameterPack()); 3309 TemplateArgument canonArgPack 3310 = getCanonicalTemplateArgument(subst->getArgumentPack()); 3311 return getSubstTemplateTemplateParmPack(canonParameter, canonArgPack); 3312 } 3313 } 3314 3315 llvm_unreachable("bad template name!"); 3316} 3317 3318bool ASTContext::hasSameTemplateName(TemplateName X, TemplateName Y) { 3319 X = getCanonicalTemplateName(X); 3320 Y = getCanonicalTemplateName(Y); 3321 return X.getAsVoidPointer() == Y.getAsVoidPointer(); 3322} 3323 3324TemplateArgument 3325ASTContext::getCanonicalTemplateArgument(const TemplateArgument &Arg) const { 3326 switch (Arg.getKind()) { 3327 case TemplateArgument::Null: 3328 return Arg; 3329 3330 case TemplateArgument::Expression: 3331 return Arg; 3332 3333 case TemplateArgument::Declaration: 3334 return TemplateArgument(Arg.getAsDecl()->getCanonicalDecl()); 3335 3336 case TemplateArgument::Template: 3337 return TemplateArgument(getCanonicalTemplateName(Arg.getAsTemplate())); 3338 3339 case TemplateArgument::TemplateExpansion: 3340 return TemplateArgument(getCanonicalTemplateName( 3341 Arg.getAsTemplateOrTemplatePattern()), 3342 Arg.getNumTemplateExpansions()); 3343 3344 case TemplateArgument::Integral: 3345 return TemplateArgument(*Arg.getAsIntegral(), 3346 getCanonicalType(Arg.getIntegralType())); 3347 3348 case TemplateArgument::Type: 3349 return TemplateArgument(getCanonicalType(Arg.getAsType())); 3350 3351 case TemplateArgument::Pack: { 3352 if (Arg.pack_size() == 0) 3353 return Arg; 3354 3355 TemplateArgument *CanonArgs 3356 = new (*this) TemplateArgument[Arg.pack_size()]; 3357 unsigned Idx = 0; 3358 for (TemplateArgument::pack_iterator A = Arg.pack_begin(), 3359 AEnd = Arg.pack_end(); 3360 A != AEnd; (void)++A, ++Idx) 3361 CanonArgs[Idx] = getCanonicalTemplateArgument(*A); 3362 3363 return TemplateArgument(CanonArgs, Arg.pack_size()); 3364 } 3365 } 3366 3367 // Silence GCC warning 3368 llvm_unreachable("Unhandled template argument kind"); 3369} 3370 3371NestedNameSpecifier * 3372ASTContext::getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) const { 3373 if (!NNS) 3374 return 0; 3375 3376 switch (NNS->getKind()) { 3377 case NestedNameSpecifier::Identifier: 3378 // Canonicalize the prefix but keep the identifier the same. 3379 return NestedNameSpecifier::Create(*this, 3380 getCanonicalNestedNameSpecifier(NNS->getPrefix()), 3381 NNS->getAsIdentifier()); 3382 3383 case NestedNameSpecifier::Namespace: 3384 // A namespace is canonical; build a nested-name-specifier with 3385 // this namespace and no prefix. 3386 return NestedNameSpecifier::Create(*this, 0, 3387 NNS->getAsNamespace()->getOriginalNamespace()); 3388 3389 case NestedNameSpecifier::NamespaceAlias: 3390 // A namespace is canonical; build a nested-name-specifier with 3391 // this namespace and no prefix. 3392 return NestedNameSpecifier::Create(*this, 0, 3393 NNS->getAsNamespaceAlias()->getNamespace() 3394 ->getOriginalNamespace()); 3395 3396 case NestedNameSpecifier::TypeSpec: 3397 case NestedNameSpecifier::TypeSpecWithTemplate: { 3398 QualType T = getCanonicalType(QualType(NNS->getAsType(), 0)); 3399 3400 // If we have some kind of dependent-named type (e.g., "typename T::type"), 3401 // break it apart into its prefix and identifier, then reconsititute those 3402 // as the canonical nested-name-specifier. This is required to canonicalize 3403 // a dependent nested-name-specifier involving typedefs of dependent-name 3404 // types, e.g., 3405 // typedef typename T::type T1; 3406 // typedef typename T1::type T2; 3407 if (const DependentNameType *DNT = T->getAs<DependentNameType>()) { 3408 NestedNameSpecifier *Prefix 3409 = getCanonicalNestedNameSpecifier(DNT->getQualifier()); 3410 return NestedNameSpecifier::Create(*this, Prefix, 3411 const_cast<IdentifierInfo *>(DNT->getIdentifier())); 3412 } 3413 3414 // Do the same thing as above, but with dependent-named specializations. 3415 if (const DependentTemplateSpecializationType *DTST 3416 = T->getAs<DependentTemplateSpecializationType>()) { 3417 NestedNameSpecifier *Prefix 3418 = getCanonicalNestedNameSpecifier(DTST->getQualifier()); 3419 3420 T = getDependentTemplateSpecializationType(DTST->getKeyword(), 3421 Prefix, DTST->getIdentifier(), 3422 DTST->getNumArgs(), 3423 DTST->getArgs()); 3424 T = getCanonicalType(T); 3425 } 3426 3427 return NestedNameSpecifier::Create(*this, 0, false, 3428 const_cast<Type*>(T.getTypePtr())); 3429 } 3430 3431 case NestedNameSpecifier::Global: 3432 // The global specifier is canonical and unique. 3433 return NNS; 3434 } 3435 3436 llvm_unreachable("Invalid NestedNameSpecifier::Kind!"); 3437} 3438 3439 3440const ArrayType *ASTContext::getAsArrayType(QualType T) const { 3441 // Handle the non-qualified case efficiently. 3442 if (!T.hasLocalQualifiers()) { 3443 // Handle the common positive case fast. 3444 if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 3445 return AT; 3446 } 3447 3448 // Handle the common negative case fast. 3449 if (!isa<ArrayType>(T.getCanonicalType())) 3450 return 0; 3451 3452 // Apply any qualifiers from the array type to the element type. This 3453 // implements C99 6.7.3p8: "If the specification of an array type includes 3454 // any type qualifiers, the element type is so qualified, not the array type." 3455 3456 // If we get here, we either have type qualifiers on the type, or we have 3457 // sugar such as a typedef in the way. If we have type qualifiers on the type 3458 // we must propagate them down into the element type. 3459 3460 SplitQualType split = T.getSplitDesugaredType(); 3461 Qualifiers qs = split.second; 3462 3463 // If we have a simple case, just return now. 3464 const ArrayType *ATy = dyn_cast<ArrayType>(split.first); 3465 if (ATy == 0 || qs.empty()) 3466 return ATy; 3467 3468 // Otherwise, we have an array and we have qualifiers on it. Push the 3469 // qualifiers into the array element type and return a new array type. 3470 QualType NewEltTy = getQualifiedType(ATy->getElementType(), qs); 3471 3472 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy)) 3473 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(), 3474 CAT->getSizeModifier(), 3475 CAT->getIndexTypeCVRQualifiers())); 3476 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy)) 3477 return cast<ArrayType>(getIncompleteArrayType(NewEltTy, 3478 IAT->getSizeModifier(), 3479 IAT->getIndexTypeCVRQualifiers())); 3480 3481 if (const DependentSizedArrayType *DSAT 3482 = dyn_cast<DependentSizedArrayType>(ATy)) 3483 return cast<ArrayType>( 3484 getDependentSizedArrayType(NewEltTy, 3485 DSAT->getSizeExpr(), 3486 DSAT->getSizeModifier(), 3487 DSAT->getIndexTypeCVRQualifiers(), 3488 DSAT->getBracketsRange())); 3489 3490 const VariableArrayType *VAT = cast<VariableArrayType>(ATy); 3491 return cast<ArrayType>(getVariableArrayType(NewEltTy, 3492 VAT->getSizeExpr(), 3493 VAT->getSizeModifier(), 3494 VAT->getIndexTypeCVRQualifiers(), 3495 VAT->getBracketsRange())); 3496} 3497 3498QualType ASTContext::getAdjustedParameterType(QualType T) { 3499 // C99 6.7.5.3p7: 3500 // A declaration of a parameter as "array of type" shall be 3501 // adjusted to "qualified pointer to type", where the type 3502 // qualifiers (if any) are those specified within the [ and ] of 3503 // the array type derivation. 3504 if (T->isArrayType()) 3505 return getArrayDecayedType(T); 3506 3507 // C99 6.7.5.3p8: 3508 // A declaration of a parameter as "function returning type" 3509 // shall be adjusted to "pointer to function returning type", as 3510 // in 6.3.2.1. 3511 if (T->isFunctionType()) 3512 return getPointerType(T); 3513 3514 return T; 3515} 3516 3517QualType ASTContext::getSignatureParameterType(QualType T) { 3518 T = getVariableArrayDecayedType(T); 3519 T = getAdjustedParameterType(T); 3520 return T.getUnqualifiedType(); 3521} 3522 3523/// getArrayDecayedType - Return the properly qualified result of decaying the 3524/// specified array type to a pointer. This operation is non-trivial when 3525/// handling typedefs etc. The canonical type of "T" must be an array type, 3526/// this returns a pointer to a properly qualified element of the array. 3527/// 3528/// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 3529QualType ASTContext::getArrayDecayedType(QualType Ty) const { 3530 // Get the element type with 'getAsArrayType' so that we don't lose any 3531 // typedefs in the element type of the array. This also handles propagation 3532 // of type qualifiers from the array type into the element type if present 3533 // (C99 6.7.3p8). 3534 const ArrayType *PrettyArrayType = getAsArrayType(Ty); 3535 assert(PrettyArrayType && "Not an array type!"); 3536 3537 QualType PtrTy = getPointerType(PrettyArrayType->getElementType()); 3538 3539 // int x[restrict 4] -> int *restrict 3540 return getQualifiedType(PtrTy, PrettyArrayType->getIndexTypeQualifiers()); 3541} 3542 3543QualType ASTContext::getBaseElementType(const ArrayType *array) const { 3544 return getBaseElementType(array->getElementType()); 3545} 3546 3547QualType ASTContext::getBaseElementType(QualType type) const { 3548 Qualifiers qs; 3549 while (true) { 3550 SplitQualType split = type.getSplitDesugaredType(); 3551 const ArrayType *array = split.first->getAsArrayTypeUnsafe(); 3552 if (!array) break; 3553 3554 type = array->getElementType(); 3555 qs.addConsistentQualifiers(split.second); 3556 } 3557 3558 return getQualifiedType(type, qs); 3559} 3560 3561/// getConstantArrayElementCount - Returns number of constant array elements. 3562uint64_t 3563ASTContext::getConstantArrayElementCount(const ConstantArrayType *CA) const { 3564 uint64_t ElementCount = 1; 3565 do { 3566 ElementCount *= CA->getSize().getZExtValue(); 3567 CA = dyn_cast<ConstantArrayType>(CA->getElementType()); 3568 } while (CA); 3569 return ElementCount; 3570} 3571 3572/// getFloatingRank - Return a relative rank for floating point types. 3573/// This routine will assert if passed a built-in type that isn't a float. 3574static FloatingRank getFloatingRank(QualType T) { 3575 if (const ComplexType *CT = T->getAs<ComplexType>()) 3576 return getFloatingRank(CT->getElementType()); 3577 3578 assert(T->getAs<BuiltinType>() && "getFloatingRank(): not a floating type"); 3579 switch (T->getAs<BuiltinType>()->getKind()) { 3580 default: llvm_unreachable("getFloatingRank(): not a floating type"); 3581 case BuiltinType::Half: return HalfRank; 3582 case BuiltinType::Float: return FloatRank; 3583 case BuiltinType::Double: return DoubleRank; 3584 case BuiltinType::LongDouble: return LongDoubleRank; 3585 } 3586} 3587 3588/// getFloatingTypeOfSizeWithinDomain - Returns a real floating 3589/// point or a complex type (based on typeDomain/typeSize). 3590/// 'typeDomain' is a real floating point or complex type. 3591/// 'typeSize' is a real floating point or complex type. 3592QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size, 3593 QualType Domain) const { 3594 FloatingRank EltRank = getFloatingRank(Size); 3595 if (Domain->isComplexType()) { 3596 switch (EltRank) { 3597 case HalfRank: llvm_unreachable("Complex half is not supported"); 3598 case FloatRank: return FloatComplexTy; 3599 case DoubleRank: return DoubleComplexTy; 3600 case LongDoubleRank: return LongDoubleComplexTy; 3601 } 3602 } 3603 3604 assert(Domain->isRealFloatingType() && "Unknown domain!"); 3605 switch (EltRank) { 3606 case HalfRank: llvm_unreachable("Half ranks are not valid here"); 3607 case FloatRank: return FloatTy; 3608 case DoubleRank: return DoubleTy; 3609 case LongDoubleRank: return LongDoubleTy; 3610 } 3611 llvm_unreachable("getFloatingRank(): illegal value for rank"); 3612} 3613 3614/// getFloatingTypeOrder - Compare the rank of the two specified floating 3615/// point types, ignoring the domain of the type (i.e. 'double' == 3616/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 3617/// LHS < RHS, return -1. 3618int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) const { 3619 FloatingRank LHSR = getFloatingRank(LHS); 3620 FloatingRank RHSR = getFloatingRank(RHS); 3621 3622 if (LHSR == RHSR) 3623 return 0; 3624 if (LHSR > RHSR) 3625 return 1; 3626 return -1; 3627} 3628 3629/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This 3630/// routine will assert if passed a built-in type that isn't an integer or enum, 3631/// or if it is not canonicalized. 3632unsigned ASTContext::getIntegerRank(const Type *T) const { 3633 assert(T->isCanonicalUnqualified() && "T should be canonicalized"); 3634 3635 switch (cast<BuiltinType>(T)->getKind()) { 3636 default: llvm_unreachable("getIntegerRank(): not a built-in integer"); 3637 case BuiltinType::Bool: 3638 return 1 + (getIntWidth(BoolTy) << 3); 3639 case BuiltinType::Char_S: 3640 case BuiltinType::Char_U: 3641 case BuiltinType::SChar: 3642 case BuiltinType::UChar: 3643 return 2 + (getIntWidth(CharTy) << 3); 3644 case BuiltinType::Short: 3645 case BuiltinType::UShort: 3646 return 3 + (getIntWidth(ShortTy) << 3); 3647 case BuiltinType::Int: 3648 case BuiltinType::UInt: 3649 return 4 + (getIntWidth(IntTy) << 3); 3650 case BuiltinType::Long: 3651 case BuiltinType::ULong: 3652 return 5 + (getIntWidth(LongTy) << 3); 3653 case BuiltinType::LongLong: 3654 case BuiltinType::ULongLong: 3655 return 6 + (getIntWidth(LongLongTy) << 3); 3656 case BuiltinType::Int128: 3657 case BuiltinType::UInt128: 3658 return 7 + (getIntWidth(Int128Ty) << 3); 3659 } 3660} 3661 3662/// \brief Whether this is a promotable bitfield reference according 3663/// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 3664/// 3665/// \returns the type this bit-field will promote to, or NULL if no 3666/// promotion occurs. 3667QualType ASTContext::isPromotableBitField(Expr *E) const { 3668 if (E->isTypeDependent() || E->isValueDependent()) 3669 return QualType(); 3670 3671 FieldDecl *Field = E->getBitField(); 3672 if (!Field) 3673 return QualType(); 3674 3675 QualType FT = Field->getType(); 3676 3677 uint64_t BitWidth = Field->getBitWidthValue(*this); 3678 uint64_t IntSize = getTypeSize(IntTy); 3679 // GCC extension compatibility: if the bit-field size is less than or equal 3680 // to the size of int, it gets promoted no matter what its type is. 3681 // For instance, unsigned long bf : 4 gets promoted to signed int. 3682 if (BitWidth < IntSize) 3683 return IntTy; 3684 3685 if (BitWidth == IntSize) 3686 return FT->isSignedIntegerType() ? IntTy : UnsignedIntTy; 3687 3688 // Types bigger than int are not subject to promotions, and therefore act 3689 // like the base type. 3690 // FIXME: This doesn't quite match what gcc does, but what gcc does here 3691 // is ridiculous. 3692 return QualType(); 3693} 3694 3695/// getPromotedIntegerType - Returns the type that Promotable will 3696/// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 3697/// integer type. 3698QualType ASTContext::getPromotedIntegerType(QualType Promotable) const { 3699 assert(!Promotable.isNull()); 3700 assert(Promotable->isPromotableIntegerType()); 3701 if (const EnumType *ET = Promotable->getAs<EnumType>()) 3702 return ET->getDecl()->getPromotionType(); 3703 3704 if (const BuiltinType *BT = Promotable->getAs<BuiltinType>()) { 3705 // C++ [conv.prom]: A prvalue of type char16_t, char32_t, or wchar_t 3706 // (3.9.1) can be converted to a prvalue of the first of the following 3707 // types that can represent all the values of its underlying type: 3708 // int, unsigned int, long int, unsigned long int, long long int, or 3709 // unsigned long long int [...] 3710 // FIXME: Is there some better way to compute this? 3711 if (BT->getKind() == BuiltinType::WChar_S || 3712 BT->getKind() == BuiltinType::WChar_U || 3713 BT->getKind() == BuiltinType::Char16 || 3714 BT->getKind() == BuiltinType::Char32) { 3715 bool FromIsSigned = BT->getKind() == BuiltinType::WChar_S; 3716 uint64_t FromSize = getTypeSize(BT); 3717 QualType PromoteTypes[] = { IntTy, UnsignedIntTy, LongTy, UnsignedLongTy, 3718 LongLongTy, UnsignedLongLongTy }; 3719 for (size_t Idx = 0; Idx < llvm::array_lengthof(PromoteTypes); ++Idx) { 3720 uint64_t ToSize = getTypeSize(PromoteTypes[Idx]); 3721 if (FromSize < ToSize || 3722 (FromSize == ToSize && 3723 FromIsSigned == PromoteTypes[Idx]->isSignedIntegerType())) 3724 return PromoteTypes[Idx]; 3725 } 3726 llvm_unreachable("char type should fit into long long"); 3727 } 3728 } 3729 3730 // At this point, we should have a signed or unsigned integer type. 3731 if (Promotable->isSignedIntegerType()) 3732 return IntTy; 3733 uint64_t PromotableSize = getTypeSize(Promotable); 3734 uint64_t IntSize = getTypeSize(IntTy); 3735 assert(Promotable->isUnsignedIntegerType() && PromotableSize <= IntSize); 3736 return (PromotableSize != IntSize) ? IntTy : UnsignedIntTy; 3737} 3738 3739/// \brief Recurses in pointer/array types until it finds an objc retainable 3740/// type and returns its ownership. 3741Qualifiers::ObjCLifetime ASTContext::getInnerObjCOwnership(QualType T) const { 3742 while (!T.isNull()) { 3743 if (T.getObjCLifetime() != Qualifiers::OCL_None) 3744 return T.getObjCLifetime(); 3745 if (T->isArrayType()) 3746 T = getBaseElementType(T); 3747 else if (const PointerType *PT = T->getAs<PointerType>()) 3748 T = PT->getPointeeType(); 3749 else if (const ReferenceType *RT = T->getAs<ReferenceType>()) 3750 T = RT->getPointeeType(); 3751 else 3752 break; 3753 } 3754 3755 return Qualifiers::OCL_None; 3756} 3757 3758/// getIntegerTypeOrder - Returns the highest ranked integer type: 3759/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 3760/// LHS < RHS, return -1. 3761int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) const { 3762 const Type *LHSC = getCanonicalType(LHS).getTypePtr(); 3763 const Type *RHSC = getCanonicalType(RHS).getTypePtr(); 3764 if (LHSC == RHSC) return 0; 3765 3766 bool LHSUnsigned = LHSC->isUnsignedIntegerType(); 3767 bool RHSUnsigned = RHSC->isUnsignedIntegerType(); 3768 3769 unsigned LHSRank = getIntegerRank(LHSC); 3770 unsigned RHSRank = getIntegerRank(RHSC); 3771 3772 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned. 3773 if (LHSRank == RHSRank) return 0; 3774 return LHSRank > RHSRank ? 1 : -1; 3775 } 3776 3777 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa. 3778 if (LHSUnsigned) { 3779 // If the unsigned [LHS] type is larger, return it. 3780 if (LHSRank >= RHSRank) 3781 return 1; 3782 3783 // If the signed type can represent all values of the unsigned type, it 3784 // wins. Because we are dealing with 2's complement and types that are 3785 // powers of two larger than each other, this is always safe. 3786 return -1; 3787 } 3788 3789 // If the unsigned [RHS] type is larger, return it. 3790 if (RHSRank >= LHSRank) 3791 return -1; 3792 3793 // If the signed type can represent all values of the unsigned type, it 3794 // wins. Because we are dealing with 2's complement and types that are 3795 // powers of two larger than each other, this is always safe. 3796 return 1; 3797} 3798 3799static RecordDecl * 3800CreateRecordDecl(const ASTContext &Ctx, RecordDecl::TagKind TK, 3801 DeclContext *DC, IdentifierInfo *Id) { 3802 SourceLocation Loc; 3803 if (Ctx.getLangOptions().CPlusPlus) 3804 return CXXRecordDecl::Create(Ctx, TK, DC, Loc, Loc, Id); 3805 else 3806 return RecordDecl::Create(Ctx, TK, DC, Loc, Loc, Id); 3807} 3808 3809// getCFConstantStringType - Return the type used for constant CFStrings. 3810QualType ASTContext::getCFConstantStringType() const { 3811 if (!CFConstantStringTypeDecl) { 3812 CFConstantStringTypeDecl = 3813 CreateRecordDecl(*this, TTK_Struct, TUDecl, 3814 &Idents.get("NSConstantString")); 3815 CFConstantStringTypeDecl->startDefinition(); 3816 3817 QualType FieldTypes[4]; 3818 3819 // const int *isa; 3820 FieldTypes[0] = getPointerType(IntTy.withConst()); 3821 // int flags; 3822 FieldTypes[1] = IntTy; 3823 // const char *str; 3824 FieldTypes[2] = getPointerType(CharTy.withConst()); 3825 // long length; 3826 FieldTypes[3] = LongTy; 3827 3828 // Create fields 3829 for (unsigned i = 0; i < 4; ++i) { 3830 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl, 3831 SourceLocation(), 3832 SourceLocation(), 0, 3833 FieldTypes[i], /*TInfo=*/0, 3834 /*BitWidth=*/0, 3835 /*Mutable=*/false, 3836 /*HasInit=*/false); 3837 Field->setAccess(AS_public); 3838 CFConstantStringTypeDecl->addDecl(Field); 3839 } 3840 3841 CFConstantStringTypeDecl->completeDefinition(); 3842 } 3843 3844 return getTagDeclType(CFConstantStringTypeDecl); 3845} 3846 3847void ASTContext::setCFConstantStringType(QualType T) { 3848 const RecordType *Rec = T->getAs<RecordType>(); 3849 assert(Rec && "Invalid CFConstantStringType"); 3850 CFConstantStringTypeDecl = Rec->getDecl(); 3851} 3852 3853QualType ASTContext::getBlockDescriptorType() const { 3854 if (BlockDescriptorType) 3855 return getTagDeclType(BlockDescriptorType); 3856 3857 RecordDecl *T; 3858 // FIXME: Needs the FlagAppleBlock bit. 3859 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, 3860 &Idents.get("__block_descriptor")); 3861 T->startDefinition(); 3862 3863 QualType FieldTypes[] = { 3864 UnsignedLongTy, 3865 UnsignedLongTy, 3866 }; 3867 3868 const char *FieldNames[] = { 3869 "reserved", 3870 "Size" 3871 }; 3872 3873 for (size_t i = 0; i < 2; ++i) { 3874 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3875 SourceLocation(), 3876 &Idents.get(FieldNames[i]), 3877 FieldTypes[i], /*TInfo=*/0, 3878 /*BitWidth=*/0, 3879 /*Mutable=*/false, 3880 /*HasInit=*/false); 3881 Field->setAccess(AS_public); 3882 T->addDecl(Field); 3883 } 3884 3885 T->completeDefinition(); 3886 3887 BlockDescriptorType = T; 3888 3889 return getTagDeclType(BlockDescriptorType); 3890} 3891 3892QualType ASTContext::getBlockDescriptorExtendedType() const { 3893 if (BlockDescriptorExtendedType) 3894 return getTagDeclType(BlockDescriptorExtendedType); 3895 3896 RecordDecl *T; 3897 // FIXME: Needs the FlagAppleBlock bit. 3898 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, 3899 &Idents.get("__block_descriptor_withcopydispose")); 3900 T->startDefinition(); 3901 3902 QualType FieldTypes[] = { 3903 UnsignedLongTy, 3904 UnsignedLongTy, 3905 getPointerType(VoidPtrTy), 3906 getPointerType(VoidPtrTy) 3907 }; 3908 3909 const char *FieldNames[] = { 3910 "reserved", 3911 "Size", 3912 "CopyFuncPtr", 3913 "DestroyFuncPtr" 3914 }; 3915 3916 for (size_t i = 0; i < 4; ++i) { 3917 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3918 SourceLocation(), 3919 &Idents.get(FieldNames[i]), 3920 FieldTypes[i], /*TInfo=*/0, 3921 /*BitWidth=*/0, 3922 /*Mutable=*/false, 3923 /*HasInit=*/false); 3924 Field->setAccess(AS_public); 3925 T->addDecl(Field); 3926 } 3927 3928 T->completeDefinition(); 3929 3930 BlockDescriptorExtendedType = T; 3931 3932 return getTagDeclType(BlockDescriptorExtendedType); 3933} 3934 3935bool ASTContext::BlockRequiresCopying(QualType Ty) const { 3936 if (Ty->isObjCRetainableType()) 3937 return true; 3938 if (getLangOptions().CPlusPlus) { 3939 if (const RecordType *RT = Ty->getAs<RecordType>()) { 3940 CXXRecordDecl *RD = cast<CXXRecordDecl>(RT->getDecl()); 3941 return RD->hasConstCopyConstructor(); 3942 3943 } 3944 } 3945 return false; 3946} 3947 3948QualType 3949ASTContext::BuildByRefType(StringRef DeclName, QualType Ty) const { 3950 // type = struct __Block_byref_1_X { 3951 // void *__isa; 3952 // struct __Block_byref_1_X *__forwarding; 3953 // unsigned int __flags; 3954 // unsigned int __size; 3955 // void *__copy_helper; // as needed 3956 // void *__destroy_help // as needed 3957 // int X; 3958 // } * 3959 3960 bool HasCopyAndDispose = BlockRequiresCopying(Ty); 3961 3962 // FIXME: Move up 3963 SmallString<36> Name; 3964 llvm::raw_svector_ostream(Name) << "__Block_byref_" << 3965 ++UniqueBlockByRefTypeID << '_' << DeclName; 3966 RecordDecl *T; 3967 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, &Idents.get(Name.str())); 3968 T->startDefinition(); 3969 QualType Int32Ty = IntTy; 3970 assert(getIntWidth(IntTy) == 32 && "non-32bit int not supported"); 3971 QualType FieldTypes[] = { 3972 getPointerType(VoidPtrTy), 3973 getPointerType(getTagDeclType(T)), 3974 Int32Ty, 3975 Int32Ty, 3976 getPointerType(VoidPtrTy), 3977 getPointerType(VoidPtrTy), 3978 Ty 3979 }; 3980 3981 StringRef FieldNames[] = { 3982 "__isa", 3983 "__forwarding", 3984 "__flags", 3985 "__size", 3986 "__copy_helper", 3987 "__destroy_helper", 3988 DeclName, 3989 }; 3990 3991 for (size_t i = 0; i < 7; ++i) { 3992 if (!HasCopyAndDispose && i >=4 && i <= 5) 3993 continue; 3994 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3995 SourceLocation(), 3996 &Idents.get(FieldNames[i]), 3997 FieldTypes[i], /*TInfo=*/0, 3998 /*BitWidth=*/0, /*Mutable=*/false, 3999 /*HasInit=*/false); 4000 Field->setAccess(AS_public); 4001 T->addDecl(Field); 4002 } 4003 4004 T->completeDefinition(); 4005 4006 return getPointerType(getTagDeclType(T)); 4007} 4008 4009TypedefDecl *ASTContext::getObjCInstanceTypeDecl() { 4010 if (!ObjCInstanceTypeDecl) 4011 ObjCInstanceTypeDecl = TypedefDecl::Create(*this, 4012 getTranslationUnitDecl(), 4013 SourceLocation(), 4014 SourceLocation(), 4015 &Idents.get("instancetype"), 4016 getTrivialTypeSourceInfo(getObjCIdType())); 4017 return ObjCInstanceTypeDecl; 4018} 4019 4020// This returns true if a type has been typedefed to BOOL: 4021// typedef <type> BOOL; 4022static bool isTypeTypedefedAsBOOL(QualType T) { 4023 if (const TypedefType *TT = dyn_cast<TypedefType>(T)) 4024 if (IdentifierInfo *II = TT->getDecl()->getIdentifier()) 4025 return II->isStr("BOOL"); 4026 4027 return false; 4028} 4029 4030/// getObjCEncodingTypeSize returns size of type for objective-c encoding 4031/// purpose. 4032CharUnits ASTContext::getObjCEncodingTypeSize(QualType type) const { 4033 if (!type->isIncompleteArrayType() && type->isIncompleteType()) 4034 return CharUnits::Zero(); 4035 4036 CharUnits sz = getTypeSizeInChars(type); 4037 4038 // Make all integer and enum types at least as large as an int 4039 if (sz.isPositive() && type->isIntegralOrEnumerationType()) 4040 sz = std::max(sz, getTypeSizeInChars(IntTy)); 4041 // Treat arrays as pointers, since that's how they're passed in. 4042 else if (type->isArrayType()) 4043 sz = getTypeSizeInChars(VoidPtrTy); 4044 return sz; 4045} 4046 4047static inline 4048std::string charUnitsToString(const CharUnits &CU) { 4049 return llvm::itostr(CU.getQuantity()); 4050} 4051 4052/// getObjCEncodingForBlock - Return the encoded type for this block 4053/// declaration. 4054std::string ASTContext::getObjCEncodingForBlock(const BlockExpr *Expr) const { 4055 std::string S; 4056 4057 const BlockDecl *Decl = Expr->getBlockDecl(); 4058 QualType BlockTy = 4059 Expr->getType()->getAs<BlockPointerType>()->getPointeeType(); 4060 // Encode result type. 4061 getObjCEncodingForType(BlockTy->getAs<FunctionType>()->getResultType(), S); 4062 // Compute size of all parameters. 4063 // Start with computing size of a pointer in number of bytes. 4064 // FIXME: There might(should) be a better way of doing this computation! 4065 SourceLocation Loc; 4066 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 4067 CharUnits ParmOffset = PtrSize; 4068 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), 4069 E = Decl->param_end(); PI != E; ++PI) { 4070 QualType PType = (*PI)->getType(); 4071 CharUnits sz = getObjCEncodingTypeSize(PType); 4072 assert (sz.isPositive() && "BlockExpr - Incomplete param type"); 4073 ParmOffset += sz; 4074 } 4075 // Size of the argument frame 4076 S += charUnitsToString(ParmOffset); 4077 // Block pointer and offset. 4078 S += "@?0"; 4079 4080 // Argument types. 4081 ParmOffset = PtrSize; 4082 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), E = 4083 Decl->param_end(); PI != E; ++PI) { 4084 ParmVarDecl *PVDecl = *PI; 4085 QualType PType = PVDecl->getOriginalType(); 4086 if (const ArrayType *AT = 4087 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 4088 // Use array's original type only if it has known number of 4089 // elements. 4090 if (!isa<ConstantArrayType>(AT)) 4091 PType = PVDecl->getType(); 4092 } else if (PType->isFunctionType()) 4093 PType = PVDecl->getType(); 4094 getObjCEncodingForType(PType, S); 4095 S += charUnitsToString(ParmOffset); 4096 ParmOffset += getObjCEncodingTypeSize(PType); 4097 } 4098 4099 return S; 4100} 4101 4102bool ASTContext::getObjCEncodingForFunctionDecl(const FunctionDecl *Decl, 4103 std::string& S) { 4104 // Encode result type. 4105 getObjCEncodingForType(Decl->getResultType(), S); 4106 CharUnits ParmOffset; 4107 // Compute size of all parameters. 4108 for (FunctionDecl::param_const_iterator PI = Decl->param_begin(), 4109 E = Decl->param_end(); PI != E; ++PI) { 4110 QualType PType = (*PI)->getType(); 4111 CharUnits sz = getObjCEncodingTypeSize(PType); 4112 if (sz.isZero()) 4113 return true; 4114 4115 assert (sz.isPositive() && 4116 "getObjCEncodingForFunctionDecl - Incomplete param type"); 4117 ParmOffset += sz; 4118 } 4119 S += charUnitsToString(ParmOffset); 4120 ParmOffset = CharUnits::Zero(); 4121 4122 // Argument types. 4123 for (FunctionDecl::param_const_iterator PI = Decl->param_begin(), 4124 E = Decl->param_end(); PI != E; ++PI) { 4125 ParmVarDecl *PVDecl = *PI; 4126 QualType PType = PVDecl->getOriginalType(); 4127 if (const ArrayType *AT = 4128 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 4129 // Use array's original type only if it has known number of 4130 // elements. 4131 if (!isa<ConstantArrayType>(AT)) 4132 PType = PVDecl->getType(); 4133 } else if (PType->isFunctionType()) 4134 PType = PVDecl->getType(); 4135 getObjCEncodingForType(PType, S); 4136 S += charUnitsToString(ParmOffset); 4137 ParmOffset += getObjCEncodingTypeSize(PType); 4138 } 4139 4140 return false; 4141} 4142 4143/// getObjCEncodingForMethodParameter - Return the encoded type for a single 4144/// method parameter or return type. If Extended, include class names and 4145/// block object types. 4146void ASTContext::getObjCEncodingForMethodParameter(Decl::ObjCDeclQualifier QT, 4147 QualType T, std::string& S, 4148 bool Extended) const { 4149 // Encode type qualifer, 'in', 'inout', etc. for the parameter. 4150 getObjCEncodingForTypeQualifier(QT, S); 4151 // Encode parameter type. 4152 getObjCEncodingForTypeImpl(T, S, true, true, 0, 4153 true /*OutermostType*/, 4154 false /*EncodingProperty*/, 4155 false /*StructField*/, 4156 Extended /*EncodeBlockParameters*/, 4157 Extended /*EncodeClassNames*/); 4158} 4159 4160/// getObjCEncodingForMethodDecl - Return the encoded type for this method 4161/// declaration. 4162bool ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, 4163 std::string& S, 4164 bool Extended) const { 4165 // FIXME: This is not very efficient. 4166 // Encode return type. 4167 getObjCEncodingForMethodParameter(Decl->getObjCDeclQualifier(), 4168 Decl->getResultType(), S, Extended); 4169 // Compute size of all parameters. 4170 // Start with computing size of a pointer in number of bytes. 4171 // FIXME: There might(should) be a better way of doing this computation! 4172 SourceLocation Loc; 4173 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 4174 // The first two arguments (self and _cmd) are pointers; account for 4175 // their size. 4176 CharUnits ParmOffset = 2 * PtrSize; 4177 for (ObjCMethodDecl::param_const_iterator PI = Decl->param_begin(), 4178 E = Decl->sel_param_end(); PI != E; ++PI) { 4179 QualType PType = (*PI)->getType(); 4180 CharUnits sz = getObjCEncodingTypeSize(PType); 4181 if (sz.isZero()) 4182 return true; 4183 4184 assert (sz.isPositive() && 4185 "getObjCEncodingForMethodDecl - Incomplete param type"); 4186 ParmOffset += sz; 4187 } 4188 S += charUnitsToString(ParmOffset); 4189 S += "@0:"; 4190 S += charUnitsToString(PtrSize); 4191 4192 // Argument types. 4193 ParmOffset = 2 * PtrSize; 4194 for (ObjCMethodDecl::param_const_iterator PI = Decl->param_begin(), 4195 E = Decl->sel_param_end(); PI != E; ++PI) { 4196 const ParmVarDecl *PVDecl = *PI; 4197 QualType PType = PVDecl->getOriginalType(); 4198 if (const ArrayType *AT = 4199 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 4200 // Use array's original type only if it has known number of 4201 // elements. 4202 if (!isa<ConstantArrayType>(AT)) 4203 PType = PVDecl->getType(); 4204 } else if (PType->isFunctionType()) 4205 PType = PVDecl->getType(); 4206 getObjCEncodingForMethodParameter(PVDecl->getObjCDeclQualifier(), 4207 PType, S, Extended); 4208 S += charUnitsToString(ParmOffset); 4209 ParmOffset += getObjCEncodingTypeSize(PType); 4210 } 4211 4212 return false; 4213} 4214 4215/// getObjCEncodingForPropertyDecl - Return the encoded type for this 4216/// property declaration. If non-NULL, Container must be either an 4217/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be 4218/// NULL when getting encodings for protocol properties. 4219/// Property attributes are stored as a comma-delimited C string. The simple 4220/// attributes readonly and bycopy are encoded as single characters. The 4221/// parametrized attributes, getter=name, setter=name, and ivar=name, are 4222/// encoded as single characters, followed by an identifier. Property types 4223/// are also encoded as a parametrized attribute. The characters used to encode 4224/// these attributes are defined by the following enumeration: 4225/// @code 4226/// enum PropertyAttributes { 4227/// kPropertyReadOnly = 'R', // property is read-only. 4228/// kPropertyBycopy = 'C', // property is a copy of the value last assigned 4229/// kPropertyByref = '&', // property is a reference to the value last assigned 4230/// kPropertyDynamic = 'D', // property is dynamic 4231/// kPropertyGetter = 'G', // followed by getter selector name 4232/// kPropertySetter = 'S', // followed by setter selector name 4233/// kPropertyInstanceVariable = 'V' // followed by instance variable name 4234/// kPropertyType = 't' // followed by old-style type encoding. 4235/// kPropertyWeak = 'W' // 'weak' property 4236/// kPropertyStrong = 'P' // property GC'able 4237/// kPropertyNonAtomic = 'N' // property non-atomic 4238/// }; 4239/// @endcode 4240void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 4241 const Decl *Container, 4242 std::string& S) const { 4243 // Collect information from the property implementation decl(s). 4244 bool Dynamic = false; 4245 ObjCPropertyImplDecl *SynthesizePID = 0; 4246 4247 // FIXME: Duplicated code due to poor abstraction. 4248 if (Container) { 4249 if (const ObjCCategoryImplDecl *CID = 4250 dyn_cast<ObjCCategoryImplDecl>(Container)) { 4251 for (ObjCCategoryImplDecl::propimpl_iterator 4252 i = CID->propimpl_begin(), e = CID->propimpl_end(); 4253 i != e; ++i) { 4254 ObjCPropertyImplDecl *PID = *i; 4255 if (PID->getPropertyDecl() == PD) { 4256 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 4257 Dynamic = true; 4258 } else { 4259 SynthesizePID = PID; 4260 } 4261 } 4262 } 4263 } else { 4264 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container); 4265 for (ObjCCategoryImplDecl::propimpl_iterator 4266 i = OID->propimpl_begin(), e = OID->propimpl_end(); 4267 i != e; ++i) { 4268 ObjCPropertyImplDecl *PID = *i; 4269 if (PID->getPropertyDecl() == PD) { 4270 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 4271 Dynamic = true; 4272 } else { 4273 SynthesizePID = PID; 4274 } 4275 } 4276 } 4277 } 4278 } 4279 4280 // FIXME: This is not very efficient. 4281 S = "T"; 4282 4283 // Encode result type. 4284 // GCC has some special rules regarding encoding of properties which 4285 // closely resembles encoding of ivars. 4286 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, 0, 4287 true /* outermost type */, 4288 true /* encoding for property */); 4289 4290 if (PD->isReadOnly()) { 4291 S += ",R"; 4292 } else { 4293 switch (PD->getSetterKind()) { 4294 case ObjCPropertyDecl::Assign: break; 4295 case ObjCPropertyDecl::Copy: S += ",C"; break; 4296 case ObjCPropertyDecl::Retain: S += ",&"; break; 4297 case ObjCPropertyDecl::Weak: S += ",W"; break; 4298 } 4299 } 4300 4301 // It really isn't clear at all what this means, since properties 4302 // are "dynamic by default". 4303 if (Dynamic) 4304 S += ",D"; 4305 4306 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) 4307 S += ",N"; 4308 4309 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) { 4310 S += ",G"; 4311 S += PD->getGetterName().getAsString(); 4312 } 4313 4314 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) { 4315 S += ",S"; 4316 S += PD->getSetterName().getAsString(); 4317 } 4318 4319 if (SynthesizePID) { 4320 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl(); 4321 S += ",V"; 4322 S += OID->getNameAsString(); 4323 } 4324 4325 // FIXME: OBJCGC: weak & strong 4326} 4327 4328/// getLegacyIntegralTypeEncoding - 4329/// Another legacy compatibility encoding: 32-bit longs are encoded as 4330/// 'l' or 'L' , but not always. For typedefs, we need to use 4331/// 'i' or 'I' instead if encoding a struct field, or a pointer! 4332/// 4333void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const { 4334 if (isa<TypedefType>(PointeeTy.getTypePtr())) { 4335 if (const BuiltinType *BT = PointeeTy->getAs<BuiltinType>()) { 4336 if (BT->getKind() == BuiltinType::ULong && getIntWidth(PointeeTy) == 32) 4337 PointeeTy = UnsignedIntTy; 4338 else 4339 if (BT->getKind() == BuiltinType::Long && getIntWidth(PointeeTy) == 32) 4340 PointeeTy = IntTy; 4341 } 4342 } 4343} 4344 4345void ASTContext::getObjCEncodingForType(QualType T, std::string& S, 4346 const FieldDecl *Field) const { 4347 // We follow the behavior of gcc, expanding structures which are 4348 // directly pointed to, and expanding embedded structures. Note that 4349 // these rules are sufficient to prevent recursive encoding of the 4350 // same type. 4351 getObjCEncodingForTypeImpl(T, S, true, true, Field, 4352 true /* outermost type */); 4353} 4354 4355static char ObjCEncodingForPrimitiveKind(const ASTContext *C, QualType T) { 4356 switch (T->getAs<BuiltinType>()->getKind()) { 4357 default: llvm_unreachable("Unhandled builtin type kind"); 4358 case BuiltinType::Void: return 'v'; 4359 case BuiltinType::Bool: return 'B'; 4360 case BuiltinType::Char_U: 4361 case BuiltinType::UChar: return 'C'; 4362 case BuiltinType::UShort: return 'S'; 4363 case BuiltinType::UInt: return 'I'; 4364 case BuiltinType::ULong: 4365 return C->getIntWidth(T) == 32 ? 'L' : 'Q'; 4366 case BuiltinType::UInt128: return 'T'; 4367 case BuiltinType::ULongLong: return 'Q'; 4368 case BuiltinType::Char_S: 4369 case BuiltinType::SChar: return 'c'; 4370 case BuiltinType::Short: return 's'; 4371 case BuiltinType::WChar_S: 4372 case BuiltinType::WChar_U: 4373 case BuiltinType::Int: return 'i'; 4374 case BuiltinType::Long: 4375 return C->getIntWidth(T) == 32 ? 'l' : 'q'; 4376 case BuiltinType::LongLong: return 'q'; 4377 case BuiltinType::Int128: return 't'; 4378 case BuiltinType::Float: return 'f'; 4379 case BuiltinType::Double: return 'd'; 4380 case BuiltinType::LongDouble: return 'D'; 4381 } 4382} 4383 4384static char ObjCEncodingForEnumType(const ASTContext *C, const EnumType *ET) { 4385 EnumDecl *Enum = ET->getDecl(); 4386 4387 // The encoding of an non-fixed enum type is always 'i', regardless of size. 4388 if (!Enum->isFixed()) 4389 return 'i'; 4390 4391 // The encoding of a fixed enum type matches its fixed underlying type. 4392 return ObjCEncodingForPrimitiveKind(C, Enum->getIntegerType()); 4393} 4394 4395static void EncodeBitField(const ASTContext *Ctx, std::string& S, 4396 QualType T, const FieldDecl *FD) { 4397 assert(FD->isBitField() && "not a bitfield - getObjCEncodingForTypeImpl"); 4398 S += 'b'; 4399 // The NeXT runtime encodes bit fields as b followed by the number of bits. 4400 // The GNU runtime requires more information; bitfields are encoded as b, 4401 // then the offset (in bits) of the first element, then the type of the 4402 // bitfield, then the size in bits. For example, in this structure: 4403 // 4404 // struct 4405 // { 4406 // int integer; 4407 // int flags:2; 4408 // }; 4409 // On a 32-bit system, the encoding for flags would be b2 for the NeXT 4410 // runtime, but b32i2 for the GNU runtime. The reason for this extra 4411 // information is not especially sensible, but we're stuck with it for 4412 // compatibility with GCC, although providing it breaks anything that 4413 // actually uses runtime introspection and wants to work on both runtimes... 4414 if (!Ctx->getLangOptions().NeXTRuntime) { 4415 const RecordDecl *RD = FD->getParent(); 4416 const ASTRecordLayout &RL = Ctx->getASTRecordLayout(RD); 4417 S += llvm::utostr(RL.getFieldOffset(FD->getFieldIndex())); 4418 if (const EnumType *ET = T->getAs<EnumType>()) 4419 S += ObjCEncodingForEnumType(Ctx, ET); 4420 else 4421 S += ObjCEncodingForPrimitiveKind(Ctx, T); 4422 } 4423 S += llvm::utostr(FD->getBitWidthValue(*Ctx)); 4424} 4425 4426// FIXME: Use SmallString for accumulating string. 4427void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S, 4428 bool ExpandPointedToStructures, 4429 bool ExpandStructures, 4430 const FieldDecl *FD, 4431 bool OutermostType, 4432 bool EncodingProperty, 4433 bool StructField, 4434 bool EncodeBlockParameters, 4435 bool EncodeClassNames) const { 4436 if (T->getAs<BuiltinType>()) { 4437 if (FD && FD->isBitField()) 4438 return EncodeBitField(this, S, T, FD); 4439 S += ObjCEncodingForPrimitiveKind(this, T); 4440 return; 4441 } 4442 4443 if (const ComplexType *CT = T->getAs<ComplexType>()) { 4444 S += 'j'; 4445 getObjCEncodingForTypeImpl(CT->getElementType(), S, false, false, 0, false, 4446 false); 4447 return; 4448 } 4449 4450 // encoding for pointer or r3eference types. 4451 QualType PointeeTy; 4452 if (const PointerType *PT = T->getAs<PointerType>()) { 4453 if (PT->isObjCSelType()) { 4454 S += ':'; 4455 return; 4456 } 4457 PointeeTy = PT->getPointeeType(); 4458 } 4459 else if (const ReferenceType *RT = T->getAs<ReferenceType>()) 4460 PointeeTy = RT->getPointeeType(); 4461 if (!PointeeTy.isNull()) { 4462 bool isReadOnly = false; 4463 // For historical/compatibility reasons, the read-only qualifier of the 4464 // pointee gets emitted _before_ the '^'. The read-only qualifier of 4465 // the pointer itself gets ignored, _unless_ we are looking at a typedef! 4466 // Also, do not emit the 'r' for anything but the outermost type! 4467 if (isa<TypedefType>(T.getTypePtr())) { 4468 if (OutermostType && T.isConstQualified()) { 4469 isReadOnly = true; 4470 S += 'r'; 4471 } 4472 } else if (OutermostType) { 4473 QualType P = PointeeTy; 4474 while (P->getAs<PointerType>()) 4475 P = P->getAs<PointerType>()->getPointeeType(); 4476 if (P.isConstQualified()) { 4477 isReadOnly = true; 4478 S += 'r'; 4479 } 4480 } 4481 if (isReadOnly) { 4482 // Another legacy compatibility encoding. Some ObjC qualifier and type 4483 // combinations need to be rearranged. 4484 // Rewrite "in const" from "nr" to "rn" 4485 if (StringRef(S).endswith("nr")) 4486 S.replace(S.end()-2, S.end(), "rn"); 4487 } 4488 4489 if (PointeeTy->isCharType()) { 4490 // char pointer types should be encoded as '*' unless it is a 4491 // type that has been typedef'd to 'BOOL'. 4492 if (!isTypeTypedefedAsBOOL(PointeeTy)) { 4493 S += '*'; 4494 return; 4495 } 4496 } else if (const RecordType *RTy = PointeeTy->getAs<RecordType>()) { 4497 // GCC binary compat: Need to convert "struct objc_class *" to "#". 4498 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_class")) { 4499 S += '#'; 4500 return; 4501 } 4502 // GCC binary compat: Need to convert "struct objc_object *" to "@". 4503 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_object")) { 4504 S += '@'; 4505 return; 4506 } 4507 // fall through... 4508 } 4509 S += '^'; 4510 getLegacyIntegralTypeEncoding(PointeeTy); 4511 4512 getObjCEncodingForTypeImpl(PointeeTy, S, false, ExpandPointedToStructures, 4513 NULL); 4514 return; 4515 } 4516 4517 if (const ArrayType *AT = 4518 // Ignore type qualifiers etc. 4519 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) { 4520 if (isa<IncompleteArrayType>(AT) && !StructField) { 4521 // Incomplete arrays are encoded as a pointer to the array element. 4522 S += '^'; 4523 4524 getObjCEncodingForTypeImpl(AT->getElementType(), S, 4525 false, ExpandStructures, FD); 4526 } else { 4527 S += '['; 4528 4529 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) { 4530 if (getTypeSize(CAT->getElementType()) == 0) 4531 S += '0'; 4532 else 4533 S += llvm::utostr(CAT->getSize().getZExtValue()); 4534 } else { 4535 //Variable length arrays are encoded as a regular array with 0 elements. 4536 assert((isa<VariableArrayType>(AT) || isa<IncompleteArrayType>(AT)) && 4537 "Unknown array type!"); 4538 S += '0'; 4539 } 4540 4541 getObjCEncodingForTypeImpl(AT->getElementType(), S, 4542 false, ExpandStructures, FD); 4543 S += ']'; 4544 } 4545 return; 4546 } 4547 4548 if (T->getAs<FunctionType>()) { 4549 S += '?'; 4550 return; 4551 } 4552 4553 if (const RecordType *RTy = T->getAs<RecordType>()) { 4554 RecordDecl *RDecl = RTy->getDecl(); 4555 S += RDecl->isUnion() ? '(' : '{'; 4556 // Anonymous structures print as '?' 4557 if (const IdentifierInfo *II = RDecl->getIdentifier()) { 4558 S += II->getName(); 4559 if (ClassTemplateSpecializationDecl *Spec 4560 = dyn_cast<ClassTemplateSpecializationDecl>(RDecl)) { 4561 const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs(); 4562 std::string TemplateArgsStr 4563 = TemplateSpecializationType::PrintTemplateArgumentList( 4564 TemplateArgs.data(), 4565 TemplateArgs.size(), 4566 (*this).getPrintingPolicy()); 4567 4568 S += TemplateArgsStr; 4569 } 4570 } else { 4571 S += '?'; 4572 } 4573 if (ExpandStructures) { 4574 S += '='; 4575 if (!RDecl->isUnion()) { 4576 getObjCEncodingForStructureImpl(RDecl, S, FD); 4577 } else { 4578 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 4579 FieldEnd = RDecl->field_end(); 4580 Field != FieldEnd; ++Field) { 4581 if (FD) { 4582 S += '"'; 4583 S += Field->getNameAsString(); 4584 S += '"'; 4585 } 4586 4587 // Special case bit-fields. 4588 if (Field->isBitField()) { 4589 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, 4590 (*Field)); 4591 } else { 4592 QualType qt = Field->getType(); 4593 getLegacyIntegralTypeEncoding(qt); 4594 getObjCEncodingForTypeImpl(qt, S, false, true, 4595 FD, /*OutermostType*/false, 4596 /*EncodingProperty*/false, 4597 /*StructField*/true); 4598 } 4599 } 4600 } 4601 } 4602 S += RDecl->isUnion() ? ')' : '}'; 4603 return; 4604 } 4605 4606 if (const EnumType *ET = T->getAs<EnumType>()) { 4607 if (FD && FD->isBitField()) 4608 EncodeBitField(this, S, T, FD); 4609 else 4610 S += ObjCEncodingForEnumType(this, ET); 4611 return; 4612 } 4613 4614 if (const BlockPointerType *BT = T->getAs<BlockPointerType>()) { 4615 S += "@?"; // Unlike a pointer-to-function, which is "^?". 4616 if (EncodeBlockParameters) { 4617 const FunctionType *FT = BT->getPointeeType()->getAs<FunctionType>(); 4618 4619 S += '<'; 4620 // Block return type 4621 getObjCEncodingForTypeImpl(FT->getResultType(), S, 4622 ExpandPointedToStructures, ExpandStructures, 4623 FD, 4624 false /* OutermostType */, 4625 EncodingProperty, 4626 false /* StructField */, 4627 EncodeBlockParameters, 4628 EncodeClassNames); 4629 // Block self 4630 S += "@?"; 4631 // Block parameters 4632 if (const FunctionProtoType *FPT = dyn_cast<FunctionProtoType>(FT)) { 4633 for (FunctionProtoType::arg_type_iterator I = FPT->arg_type_begin(), 4634 E = FPT->arg_type_end(); I && (I != E); ++I) { 4635 getObjCEncodingForTypeImpl(*I, S, 4636 ExpandPointedToStructures, 4637 ExpandStructures, 4638 FD, 4639 false /* OutermostType */, 4640 EncodingProperty, 4641 false /* StructField */, 4642 EncodeBlockParameters, 4643 EncodeClassNames); 4644 } 4645 } 4646 S += '>'; 4647 } 4648 return; 4649 } 4650 4651 // Ignore protocol qualifiers when mangling at this level. 4652 if (const ObjCObjectType *OT = T->getAs<ObjCObjectType>()) 4653 T = OT->getBaseType(); 4654 4655 if (const ObjCInterfaceType *OIT = T->getAs<ObjCInterfaceType>()) { 4656 // @encode(class_name) 4657 ObjCInterfaceDecl *OI = OIT->getDecl(); 4658 S += '{'; 4659 const IdentifierInfo *II = OI->getIdentifier(); 4660 S += II->getName(); 4661 S += '='; 4662 SmallVector<const ObjCIvarDecl*, 32> Ivars; 4663 DeepCollectObjCIvars(OI, true, Ivars); 4664 for (unsigned i = 0, e = Ivars.size(); i != e; ++i) { 4665 const FieldDecl *Field = cast<FieldDecl>(Ivars[i]); 4666 if (Field->isBitField()) 4667 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, Field); 4668 else 4669 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, FD); 4670 } 4671 S += '}'; 4672 return; 4673 } 4674 4675 if (const ObjCObjectPointerType *OPT = T->getAs<ObjCObjectPointerType>()) { 4676 if (OPT->isObjCIdType()) { 4677 S += '@'; 4678 return; 4679 } 4680 4681 if (OPT->isObjCClassType() || OPT->isObjCQualifiedClassType()) { 4682 // FIXME: Consider if we need to output qualifiers for 'Class<p>'. 4683 // Since this is a binary compatibility issue, need to consult with runtime 4684 // folks. Fortunately, this is a *very* obsure construct. 4685 S += '#'; 4686 return; 4687 } 4688 4689 if (OPT->isObjCQualifiedIdType()) { 4690 getObjCEncodingForTypeImpl(getObjCIdType(), S, 4691 ExpandPointedToStructures, 4692 ExpandStructures, FD); 4693 if (FD || EncodingProperty || EncodeClassNames) { 4694 // Note that we do extended encoding of protocol qualifer list 4695 // Only when doing ivar or property encoding. 4696 S += '"'; 4697 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 4698 E = OPT->qual_end(); I != E; ++I) { 4699 S += '<'; 4700 S += (*I)->getNameAsString(); 4701 S += '>'; 4702 } 4703 S += '"'; 4704 } 4705 return; 4706 } 4707 4708 QualType PointeeTy = OPT->getPointeeType(); 4709 if (!EncodingProperty && 4710 isa<TypedefType>(PointeeTy.getTypePtr())) { 4711 // Another historical/compatibility reason. 4712 // We encode the underlying type which comes out as 4713 // {...}; 4714 S += '^'; 4715 getObjCEncodingForTypeImpl(PointeeTy, S, 4716 false, ExpandPointedToStructures, 4717 NULL); 4718 return; 4719 } 4720 4721 S += '@'; 4722 if (OPT->getInterfaceDecl() && 4723 (FD || EncodingProperty || EncodeClassNames)) { 4724 S += '"'; 4725 S += OPT->getInterfaceDecl()->getIdentifier()->getName(); 4726 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 4727 E = OPT->qual_end(); I != E; ++I) { 4728 S += '<'; 4729 S += (*I)->getNameAsString(); 4730 S += '>'; 4731 } 4732 S += '"'; 4733 } 4734 return; 4735 } 4736 4737 // gcc just blithely ignores member pointers. 4738 // TODO: maybe there should be a mangling for these 4739 if (T->getAs<MemberPointerType>()) 4740 return; 4741 4742 if (T->isVectorType()) { 4743 // This matches gcc's encoding, even though technically it is 4744 // insufficient. 4745 // FIXME. We should do a better job than gcc. 4746 return; 4747 } 4748 4749 llvm_unreachable("@encode for type not implemented!"); 4750} 4751 4752void ASTContext::getObjCEncodingForStructureImpl(RecordDecl *RDecl, 4753 std::string &S, 4754 const FieldDecl *FD, 4755 bool includeVBases) const { 4756 assert(RDecl && "Expected non-null RecordDecl"); 4757 assert(!RDecl->isUnion() && "Should not be called for unions"); 4758 if (!RDecl->getDefinition()) 4759 return; 4760 4761 CXXRecordDecl *CXXRec = dyn_cast<CXXRecordDecl>(RDecl); 4762 std::multimap<uint64_t, NamedDecl *> FieldOrBaseOffsets; 4763 const ASTRecordLayout &layout = getASTRecordLayout(RDecl); 4764 4765 if (CXXRec) { 4766 for (CXXRecordDecl::base_class_iterator 4767 BI = CXXRec->bases_begin(), 4768 BE = CXXRec->bases_end(); BI != BE; ++BI) { 4769 if (!BI->isVirtual()) { 4770 CXXRecordDecl *base = BI->getType()->getAsCXXRecordDecl(); 4771 if (base->isEmpty()) 4772 continue; 4773 uint64_t offs = layout.getBaseClassOffsetInBits(base); 4774 FieldOrBaseOffsets.insert(FieldOrBaseOffsets.upper_bound(offs), 4775 std::make_pair(offs, base)); 4776 } 4777 } 4778 } 4779 4780 unsigned i = 0; 4781 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 4782 FieldEnd = RDecl->field_end(); 4783 Field != FieldEnd; ++Field, ++i) { 4784 uint64_t offs = layout.getFieldOffset(i); 4785 FieldOrBaseOffsets.insert(FieldOrBaseOffsets.upper_bound(offs), 4786 std::make_pair(offs, *Field)); 4787 } 4788 4789 if (CXXRec && includeVBases) { 4790 for (CXXRecordDecl::base_class_iterator 4791 BI = CXXRec->vbases_begin(), 4792 BE = CXXRec->vbases_end(); BI != BE; ++BI) { 4793 CXXRecordDecl *base = BI->getType()->getAsCXXRecordDecl(); 4794 if (base->isEmpty()) 4795 continue; 4796 uint64_t offs = layout.getVBaseClassOffsetInBits(base); 4797 if (FieldOrBaseOffsets.find(offs) == FieldOrBaseOffsets.end()) 4798 FieldOrBaseOffsets.insert(FieldOrBaseOffsets.end(), 4799 std::make_pair(offs, base)); 4800 } 4801 } 4802 4803 CharUnits size; 4804 if (CXXRec) { 4805 size = includeVBases ? layout.getSize() : layout.getNonVirtualSize(); 4806 } else { 4807 size = layout.getSize(); 4808 } 4809 4810 uint64_t CurOffs = 0; 4811 std::multimap<uint64_t, NamedDecl *>::iterator 4812 CurLayObj = FieldOrBaseOffsets.begin(); 4813 4814 if ((CurLayObj != FieldOrBaseOffsets.end() && CurLayObj->first != 0) || 4815 (CurLayObj == FieldOrBaseOffsets.end() && 4816 CXXRec && CXXRec->isDynamicClass())) { 4817 assert(CXXRec && CXXRec->isDynamicClass() && 4818 "Offset 0 was empty but no VTable ?"); 4819 if (FD) { 4820 S += "\"_vptr$"; 4821 std::string recname = CXXRec->getNameAsString(); 4822 if (recname.empty()) recname = "?"; 4823 S += recname; 4824 S += '"'; 4825 } 4826 S += "^^?"; 4827 CurOffs += getTypeSize(VoidPtrTy); 4828 } 4829 4830 if (!RDecl->hasFlexibleArrayMember()) { 4831 // Mark the end of the structure. 4832 uint64_t offs = toBits(size); 4833 FieldOrBaseOffsets.insert(FieldOrBaseOffsets.upper_bound(offs), 4834 std::make_pair(offs, (NamedDecl*)0)); 4835 } 4836 4837 for (; CurLayObj != FieldOrBaseOffsets.end(); ++CurLayObj) { 4838 assert(CurOffs <= CurLayObj->first); 4839 4840 if (CurOffs < CurLayObj->first) { 4841 uint64_t padding = CurLayObj->first - CurOffs; 4842 // FIXME: There doesn't seem to be a way to indicate in the encoding that 4843 // packing/alignment of members is different that normal, in which case 4844 // the encoding will be out-of-sync with the real layout. 4845 // If the runtime switches to just consider the size of types without 4846 // taking into account alignment, we could make padding explicit in the 4847 // encoding (e.g. using arrays of chars). The encoding strings would be 4848 // longer then though. 4849 CurOffs += padding; 4850 } 4851 4852 NamedDecl *dcl = CurLayObj->second; 4853 if (dcl == 0) 4854 break; // reached end of structure. 4855 4856 if (CXXRecordDecl *base = dyn_cast<CXXRecordDecl>(dcl)) { 4857 // We expand the bases without their virtual bases since those are going 4858 // in the initial structure. Note that this differs from gcc which 4859 // expands virtual bases each time one is encountered in the hierarchy, 4860 // making the encoding type bigger than it really is. 4861 getObjCEncodingForStructureImpl(base, S, FD, /*includeVBases*/false); 4862 assert(!base->isEmpty()); 4863 CurOffs += toBits(getASTRecordLayout(base).getNonVirtualSize()); 4864 } else { 4865 FieldDecl *field = cast<FieldDecl>(dcl); 4866 if (FD) { 4867 S += '"'; 4868 S += field->getNameAsString(); 4869 S += '"'; 4870 } 4871 4872 if (field->isBitField()) { 4873 EncodeBitField(this, S, field->getType(), field); 4874 CurOffs += field->getBitWidthValue(*this); 4875 } else { 4876 QualType qt = field->getType(); 4877 getLegacyIntegralTypeEncoding(qt); 4878 getObjCEncodingForTypeImpl(qt, S, false, true, FD, 4879 /*OutermostType*/false, 4880 /*EncodingProperty*/false, 4881 /*StructField*/true); 4882 CurOffs += getTypeSize(field->getType()); 4883 } 4884 } 4885 } 4886} 4887 4888void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 4889 std::string& S) const { 4890 if (QT & Decl::OBJC_TQ_In) 4891 S += 'n'; 4892 if (QT & Decl::OBJC_TQ_Inout) 4893 S += 'N'; 4894 if (QT & Decl::OBJC_TQ_Out) 4895 S += 'o'; 4896 if (QT & Decl::OBJC_TQ_Bycopy) 4897 S += 'O'; 4898 if (QT & Decl::OBJC_TQ_Byref) 4899 S += 'R'; 4900 if (QT & Decl::OBJC_TQ_Oneway) 4901 S += 'V'; 4902} 4903 4904void ASTContext::setBuiltinVaListType(QualType T) { 4905 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!"); 4906 4907 BuiltinVaListType = T; 4908} 4909 4910TypedefDecl *ASTContext::getObjCIdDecl() const { 4911 if (!ObjCIdDecl) { 4912 QualType T = getObjCObjectType(ObjCBuiltinIdTy, 0, 0); 4913 T = getObjCObjectPointerType(T); 4914 TypeSourceInfo *IdInfo = getTrivialTypeSourceInfo(T); 4915 ObjCIdDecl = TypedefDecl::Create(const_cast<ASTContext &>(*this), 4916 getTranslationUnitDecl(), 4917 SourceLocation(), SourceLocation(), 4918 &Idents.get("id"), IdInfo); 4919 } 4920 4921 return ObjCIdDecl; 4922} 4923 4924TypedefDecl *ASTContext::getObjCSelDecl() const { 4925 if (!ObjCSelDecl) { 4926 QualType SelT = getPointerType(ObjCBuiltinSelTy); 4927 TypeSourceInfo *SelInfo = getTrivialTypeSourceInfo(SelT); 4928 ObjCSelDecl = TypedefDecl::Create(const_cast<ASTContext &>(*this), 4929 getTranslationUnitDecl(), 4930 SourceLocation(), SourceLocation(), 4931 &Idents.get("SEL"), SelInfo); 4932 } 4933 return ObjCSelDecl; 4934} 4935 4936TypedefDecl *ASTContext::getObjCClassDecl() const { 4937 if (!ObjCClassDecl) { 4938 QualType T = getObjCObjectType(ObjCBuiltinClassTy, 0, 0); 4939 T = getObjCObjectPointerType(T); 4940 TypeSourceInfo *ClassInfo = getTrivialTypeSourceInfo(T); 4941 ObjCClassDecl = TypedefDecl::Create(const_cast<ASTContext &>(*this), 4942 getTranslationUnitDecl(), 4943 SourceLocation(), SourceLocation(), 4944 &Idents.get("Class"), ClassInfo); 4945 } 4946 4947 return ObjCClassDecl; 4948} 4949 4950ObjCInterfaceDecl *ASTContext::getObjCProtocolDecl() const { 4951 if (!ObjCProtocolClassDecl) { 4952 ObjCProtocolClassDecl 4953 = ObjCInterfaceDecl::Create(*this, getTranslationUnitDecl(), 4954 SourceLocation(), 4955 &Idents.get("Protocol"), 4956 /*PrevDecl=*/0, 4957 SourceLocation(), true); 4958 } 4959 4960 return ObjCProtocolClassDecl; 4961} 4962 4963void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) { 4964 assert(ObjCConstantStringType.isNull() && 4965 "'NSConstantString' type already set!"); 4966 4967 ObjCConstantStringType = getObjCInterfaceType(Decl); 4968} 4969 4970/// \brief Retrieve the template name that corresponds to a non-empty 4971/// lookup. 4972TemplateName 4973ASTContext::getOverloadedTemplateName(UnresolvedSetIterator Begin, 4974 UnresolvedSetIterator End) const { 4975 unsigned size = End - Begin; 4976 assert(size > 1 && "set is not overloaded!"); 4977 4978 void *memory = Allocate(sizeof(OverloadedTemplateStorage) + 4979 size * sizeof(FunctionTemplateDecl*)); 4980 OverloadedTemplateStorage *OT = new(memory) OverloadedTemplateStorage(size); 4981 4982 NamedDecl **Storage = OT->getStorage(); 4983 for (UnresolvedSetIterator I = Begin; I != End; ++I) { 4984 NamedDecl *D = *I; 4985 assert(isa<FunctionTemplateDecl>(D) || 4986 (isa<UsingShadowDecl>(D) && 4987 isa<FunctionTemplateDecl>(D->getUnderlyingDecl()))); 4988 *Storage++ = D; 4989 } 4990 4991 return TemplateName(OT); 4992} 4993 4994/// \brief Retrieve the template name that represents a qualified 4995/// template name such as \c std::vector. 4996TemplateName 4997ASTContext::getQualifiedTemplateName(NestedNameSpecifier *NNS, 4998 bool TemplateKeyword, 4999 TemplateDecl *Template) const { 5000 assert(NNS && "Missing nested-name-specifier in qualified template name"); 5001 5002 // FIXME: Canonicalization? 5003 llvm::FoldingSetNodeID ID; 5004 QualifiedTemplateName::Profile(ID, NNS, TemplateKeyword, Template); 5005 5006 void *InsertPos = 0; 5007 QualifiedTemplateName *QTN = 5008 QualifiedTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 5009 if (!QTN) { 5010 QTN = new (*this,4) QualifiedTemplateName(NNS, TemplateKeyword, Template); 5011 QualifiedTemplateNames.InsertNode(QTN, InsertPos); 5012 } 5013 5014 return TemplateName(QTN); 5015} 5016 5017/// \brief Retrieve the template name that represents a dependent 5018/// template name such as \c MetaFun::template apply. 5019TemplateName 5020ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 5021 const IdentifierInfo *Name) const { 5022 assert((!NNS || NNS->isDependent()) && 5023 "Nested name specifier must be dependent"); 5024 5025 llvm::FoldingSetNodeID ID; 5026 DependentTemplateName::Profile(ID, NNS, Name); 5027 5028 void *InsertPos = 0; 5029 DependentTemplateName *QTN = 5030 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 5031 5032 if (QTN) 5033 return TemplateName(QTN); 5034 5035 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 5036 if (CanonNNS == NNS) { 5037 QTN = new (*this,4) DependentTemplateName(NNS, Name); 5038 } else { 5039 TemplateName Canon = getDependentTemplateName(CanonNNS, Name); 5040 QTN = new (*this,4) DependentTemplateName(NNS, Name, Canon); 5041 DependentTemplateName *CheckQTN = 5042 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 5043 assert(!CheckQTN && "Dependent type name canonicalization broken"); 5044 (void)CheckQTN; 5045 } 5046 5047 DependentTemplateNames.InsertNode(QTN, InsertPos); 5048 return TemplateName(QTN); 5049} 5050 5051/// \brief Retrieve the template name that represents a dependent 5052/// template name such as \c MetaFun::template operator+. 5053TemplateName 5054ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 5055 OverloadedOperatorKind Operator) const { 5056 assert((!NNS || NNS->isDependent()) && 5057 "Nested name specifier must be dependent"); 5058 5059 llvm::FoldingSetNodeID ID; 5060 DependentTemplateName::Profile(ID, NNS, Operator); 5061 5062 void *InsertPos = 0; 5063 DependentTemplateName *QTN 5064 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 5065 5066 if (QTN) 5067 return TemplateName(QTN); 5068 5069 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 5070 if (CanonNNS == NNS) { 5071 QTN = new (*this,4) DependentTemplateName(NNS, Operator); 5072 } else { 5073 TemplateName Canon = getDependentTemplateName(CanonNNS, Operator); 5074 QTN = new (*this,4) DependentTemplateName(NNS, Operator, Canon); 5075 5076 DependentTemplateName *CheckQTN 5077 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 5078 assert(!CheckQTN && "Dependent template name canonicalization broken"); 5079 (void)CheckQTN; 5080 } 5081 5082 DependentTemplateNames.InsertNode(QTN, InsertPos); 5083 return TemplateName(QTN); 5084} 5085 5086TemplateName 5087ASTContext::getSubstTemplateTemplateParm(TemplateTemplateParmDecl *param, 5088 TemplateName replacement) const { 5089 llvm::FoldingSetNodeID ID; 5090 SubstTemplateTemplateParmStorage::Profile(ID, param, replacement); 5091 5092 void *insertPos = 0; 5093 SubstTemplateTemplateParmStorage *subst 5094 = SubstTemplateTemplateParms.FindNodeOrInsertPos(ID, insertPos); 5095 5096 if (!subst) { 5097 subst = new (*this) SubstTemplateTemplateParmStorage(param, replacement); 5098 SubstTemplateTemplateParms.InsertNode(subst, insertPos); 5099 } 5100 5101 return TemplateName(subst); 5102} 5103 5104TemplateName 5105ASTContext::getSubstTemplateTemplateParmPack(TemplateTemplateParmDecl *Param, 5106 const TemplateArgument &ArgPack) const { 5107 ASTContext &Self = const_cast<ASTContext &>(*this); 5108 llvm::FoldingSetNodeID ID; 5109 SubstTemplateTemplateParmPackStorage::Profile(ID, Self, Param, ArgPack); 5110 5111 void *InsertPos = 0; 5112 SubstTemplateTemplateParmPackStorage *Subst 5113 = SubstTemplateTemplateParmPacks.FindNodeOrInsertPos(ID, InsertPos); 5114 5115 if (!Subst) { 5116 Subst = new (*this) SubstTemplateTemplateParmPackStorage(Param, 5117 ArgPack.pack_size(), 5118 ArgPack.pack_begin()); 5119 SubstTemplateTemplateParmPacks.InsertNode(Subst, InsertPos); 5120 } 5121 5122 return TemplateName(Subst); 5123} 5124 5125/// getFromTargetType - Given one of the integer types provided by 5126/// TargetInfo, produce the corresponding type. The unsigned @p Type 5127/// is actually a value of type @c TargetInfo::IntType. 5128CanQualType ASTContext::getFromTargetType(unsigned Type) const { 5129 switch (Type) { 5130 case TargetInfo::NoInt: return CanQualType(); 5131 case TargetInfo::SignedShort: return ShortTy; 5132 case TargetInfo::UnsignedShort: return UnsignedShortTy; 5133 case TargetInfo::SignedInt: return IntTy; 5134 case TargetInfo::UnsignedInt: return UnsignedIntTy; 5135 case TargetInfo::SignedLong: return LongTy; 5136 case TargetInfo::UnsignedLong: return UnsignedLongTy; 5137 case TargetInfo::SignedLongLong: return LongLongTy; 5138 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy; 5139 } 5140 5141 llvm_unreachable("Unhandled TargetInfo::IntType value"); 5142} 5143 5144//===----------------------------------------------------------------------===// 5145// Type Predicates. 5146//===----------------------------------------------------------------------===// 5147 5148/// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 5149/// garbage collection attribute. 5150/// 5151Qualifiers::GC ASTContext::getObjCGCAttrKind(QualType Ty) const { 5152 if (getLangOptions().getGC() == LangOptions::NonGC) 5153 return Qualifiers::GCNone; 5154 5155 assert(getLangOptions().ObjC1); 5156 Qualifiers::GC GCAttrs = Ty.getObjCGCAttr(); 5157 5158 // Default behaviour under objective-C's gc is for ObjC pointers 5159 // (or pointers to them) be treated as though they were declared 5160 // as __strong. 5161 if (GCAttrs == Qualifiers::GCNone) { 5162 if (Ty->isObjCObjectPointerType() || Ty->isBlockPointerType()) 5163 return Qualifiers::Strong; 5164 else if (Ty->isPointerType()) 5165 return getObjCGCAttrKind(Ty->getAs<PointerType>()->getPointeeType()); 5166 } else { 5167 // It's not valid to set GC attributes on anything that isn't a 5168 // pointer. 5169#ifndef NDEBUG 5170 QualType CT = Ty->getCanonicalTypeInternal(); 5171 while (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 5172 CT = AT->getElementType(); 5173 assert(CT->isAnyPointerType() || CT->isBlockPointerType()); 5174#endif 5175 } 5176 return GCAttrs; 5177} 5178 5179//===----------------------------------------------------------------------===// 5180// Type Compatibility Testing 5181//===----------------------------------------------------------------------===// 5182 5183/// areCompatVectorTypes - Return true if the two specified vector types are 5184/// compatible. 5185static bool areCompatVectorTypes(const VectorType *LHS, 5186 const VectorType *RHS) { 5187 assert(LHS->isCanonicalUnqualified() && RHS->isCanonicalUnqualified()); 5188 return LHS->getElementType() == RHS->getElementType() && 5189 LHS->getNumElements() == RHS->getNumElements(); 5190} 5191 5192bool ASTContext::areCompatibleVectorTypes(QualType FirstVec, 5193 QualType SecondVec) { 5194 assert(FirstVec->isVectorType() && "FirstVec should be a vector type"); 5195 assert(SecondVec->isVectorType() && "SecondVec should be a vector type"); 5196 5197 if (hasSameUnqualifiedType(FirstVec, SecondVec)) 5198 return true; 5199 5200 // Treat Neon vector types and most AltiVec vector types as if they are the 5201 // equivalent GCC vector types. 5202 const VectorType *First = FirstVec->getAs<VectorType>(); 5203 const VectorType *Second = SecondVec->getAs<VectorType>(); 5204 if (First->getNumElements() == Second->getNumElements() && 5205 hasSameType(First->getElementType(), Second->getElementType()) && 5206 First->getVectorKind() != VectorType::AltiVecPixel && 5207 First->getVectorKind() != VectorType::AltiVecBool && 5208 Second->getVectorKind() != VectorType::AltiVecPixel && 5209 Second->getVectorKind() != VectorType::AltiVecBool) 5210 return true; 5211 5212 return false; 5213} 5214 5215//===----------------------------------------------------------------------===// 5216// ObjCQualifiedIdTypesAreCompatible - Compatibility testing for qualified id's. 5217//===----------------------------------------------------------------------===// 5218 5219/// ProtocolCompatibleWithProtocol - return 'true' if 'lProto' is in the 5220/// inheritance hierarchy of 'rProto'. 5221bool 5222ASTContext::ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 5223 ObjCProtocolDecl *rProto) const { 5224 if (declaresSameEntity(lProto, rProto)) 5225 return true; 5226 for (ObjCProtocolDecl::protocol_iterator PI = rProto->protocol_begin(), 5227 E = rProto->protocol_end(); PI != E; ++PI) 5228 if (ProtocolCompatibleWithProtocol(lProto, *PI)) 5229 return true; 5230 return false; 5231} 5232 5233/// QualifiedIdConformsQualifiedId - compare id<p,...> with id<p1,...> 5234/// return true if lhs's protocols conform to rhs's protocol; false 5235/// otherwise. 5236bool ASTContext::QualifiedIdConformsQualifiedId(QualType lhs, QualType rhs) { 5237 if (lhs->isObjCQualifiedIdType() && rhs->isObjCQualifiedIdType()) 5238 return ObjCQualifiedIdTypesAreCompatible(lhs, rhs, false); 5239 return false; 5240} 5241 5242/// ObjCQualifiedClassTypesAreCompatible - compare Class<p,...> and 5243/// Class<p1, ...>. 5244bool ASTContext::ObjCQualifiedClassTypesAreCompatible(QualType lhs, 5245 QualType rhs) { 5246 const ObjCObjectPointerType *lhsQID = lhs->getAs<ObjCObjectPointerType>(); 5247 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 5248 assert ((lhsQID && rhsOPT) && "ObjCQualifiedClassTypesAreCompatible"); 5249 5250 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 5251 E = lhsQID->qual_end(); I != E; ++I) { 5252 bool match = false; 5253 ObjCProtocolDecl *lhsProto = *I; 5254 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 5255 E = rhsOPT->qual_end(); J != E; ++J) { 5256 ObjCProtocolDecl *rhsProto = *J; 5257 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto)) { 5258 match = true; 5259 break; 5260 } 5261 } 5262 if (!match) 5263 return false; 5264 } 5265 return true; 5266} 5267 5268/// ObjCQualifiedIdTypesAreCompatible - We know that one of lhs/rhs is an 5269/// ObjCQualifiedIDType. 5270bool ASTContext::ObjCQualifiedIdTypesAreCompatible(QualType lhs, QualType rhs, 5271 bool compare) { 5272 // Allow id<P..> and an 'id' or void* type in all cases. 5273 if (lhs->isVoidPointerType() || 5274 lhs->isObjCIdType() || lhs->isObjCClassType()) 5275 return true; 5276 else if (rhs->isVoidPointerType() || 5277 rhs->isObjCIdType() || rhs->isObjCClassType()) 5278 return true; 5279 5280 if (const ObjCObjectPointerType *lhsQID = lhs->getAsObjCQualifiedIdType()) { 5281 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 5282 5283 if (!rhsOPT) return false; 5284 5285 if (rhsOPT->qual_empty()) { 5286 // If the RHS is a unqualified interface pointer "NSString*", 5287 // make sure we check the class hierarchy. 5288 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 5289 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 5290 E = lhsQID->qual_end(); I != E; ++I) { 5291 // when comparing an id<P> on lhs with a static type on rhs, 5292 // see if static class implements all of id's protocols, directly or 5293 // through its super class and categories. 5294 if (!rhsID->ClassImplementsProtocol(*I, true)) 5295 return false; 5296 } 5297 } 5298 // If there are no qualifiers and no interface, we have an 'id'. 5299 return true; 5300 } 5301 // Both the right and left sides have qualifiers. 5302 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 5303 E = lhsQID->qual_end(); I != E; ++I) { 5304 ObjCProtocolDecl *lhsProto = *I; 5305 bool match = false; 5306 5307 // when comparing an id<P> on lhs with a static type on rhs, 5308 // see if static class implements all of id's protocols, directly or 5309 // through its super class and categories. 5310 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 5311 E = rhsOPT->qual_end(); J != E; ++J) { 5312 ObjCProtocolDecl *rhsProto = *J; 5313 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 5314 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 5315 match = true; 5316 break; 5317 } 5318 } 5319 // If the RHS is a qualified interface pointer "NSString<P>*", 5320 // make sure we check the class hierarchy. 5321 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 5322 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 5323 E = lhsQID->qual_end(); I != E; ++I) { 5324 // when comparing an id<P> on lhs with a static type on rhs, 5325 // see if static class implements all of id's protocols, directly or 5326 // through its super class and categories. 5327 if (rhsID->ClassImplementsProtocol(*I, true)) { 5328 match = true; 5329 break; 5330 } 5331 } 5332 } 5333 if (!match) 5334 return false; 5335 } 5336 5337 return true; 5338 } 5339 5340 const ObjCObjectPointerType *rhsQID = rhs->getAsObjCQualifiedIdType(); 5341 assert(rhsQID && "One of the LHS/RHS should be id<x>"); 5342 5343 if (const ObjCObjectPointerType *lhsOPT = 5344 lhs->getAsObjCInterfacePointerType()) { 5345 // If both the right and left sides have qualifiers. 5346 for (ObjCObjectPointerType::qual_iterator I = lhsOPT->qual_begin(), 5347 E = lhsOPT->qual_end(); I != E; ++I) { 5348 ObjCProtocolDecl *lhsProto = *I; 5349 bool match = false; 5350 5351 // when comparing an id<P> on rhs with a static type on lhs, 5352 // see if static class implements all of id's protocols, directly or 5353 // through its super class and categories. 5354 // First, lhs protocols in the qualifier list must be found, direct 5355 // or indirect in rhs's qualifier list or it is a mismatch. 5356 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 5357 E = rhsQID->qual_end(); J != E; ++J) { 5358 ObjCProtocolDecl *rhsProto = *J; 5359 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 5360 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 5361 match = true; 5362 break; 5363 } 5364 } 5365 if (!match) 5366 return false; 5367 } 5368 5369 // Static class's protocols, or its super class or category protocols 5370 // must be found, direct or indirect in rhs's qualifier list or it is a mismatch. 5371 if (ObjCInterfaceDecl *lhsID = lhsOPT->getInterfaceDecl()) { 5372 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 5373 CollectInheritedProtocols(lhsID, LHSInheritedProtocols); 5374 // This is rather dubious but matches gcc's behavior. If lhs has 5375 // no type qualifier and its class has no static protocol(s) 5376 // assume that it is mismatch. 5377 if (LHSInheritedProtocols.empty() && lhsOPT->qual_empty()) 5378 return false; 5379 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 5380 LHSInheritedProtocols.begin(), 5381 E = LHSInheritedProtocols.end(); I != E; ++I) { 5382 bool match = false; 5383 ObjCProtocolDecl *lhsProto = (*I); 5384 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 5385 E = rhsQID->qual_end(); J != E; ++J) { 5386 ObjCProtocolDecl *rhsProto = *J; 5387 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 5388 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 5389 match = true; 5390 break; 5391 } 5392 } 5393 if (!match) 5394 return false; 5395 } 5396 } 5397 return true; 5398 } 5399 return false; 5400} 5401 5402/// canAssignObjCInterfaces - Return true if the two interface types are 5403/// compatible for assignment from RHS to LHS. This handles validation of any 5404/// protocol qualifiers on the LHS or RHS. 5405/// 5406bool ASTContext::canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 5407 const ObjCObjectPointerType *RHSOPT) { 5408 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 5409 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 5410 5411 // If either type represents the built-in 'id' or 'Class' types, return true. 5412 if (LHS->isObjCUnqualifiedIdOrClass() || 5413 RHS->isObjCUnqualifiedIdOrClass()) 5414 return true; 5415 5416 if (LHS->isObjCQualifiedId() || RHS->isObjCQualifiedId()) 5417 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 5418 QualType(RHSOPT,0), 5419 false); 5420 5421 if (LHS->isObjCQualifiedClass() && RHS->isObjCQualifiedClass()) 5422 return ObjCQualifiedClassTypesAreCompatible(QualType(LHSOPT,0), 5423 QualType(RHSOPT,0)); 5424 5425 // If we have 2 user-defined types, fall into that path. 5426 if (LHS->getInterface() && RHS->getInterface()) 5427 return canAssignObjCInterfaces(LHS, RHS); 5428 5429 return false; 5430} 5431 5432/// canAssignObjCInterfacesInBlockPointer - This routine is specifically written 5433/// for providing type-safety for objective-c pointers used to pass/return 5434/// arguments in block literals. When passed as arguments, passing 'A*' where 5435/// 'id' is expected is not OK. Passing 'Sub *" where 'Super *" is expected is 5436/// not OK. For the return type, the opposite is not OK. 5437bool ASTContext::canAssignObjCInterfacesInBlockPointer( 5438 const ObjCObjectPointerType *LHSOPT, 5439 const ObjCObjectPointerType *RHSOPT, 5440 bool BlockReturnType) { 5441 if (RHSOPT->isObjCBuiltinType() || LHSOPT->isObjCIdType()) 5442 return true; 5443 5444 if (LHSOPT->isObjCBuiltinType()) { 5445 return RHSOPT->isObjCBuiltinType() || RHSOPT->isObjCQualifiedIdType(); 5446 } 5447 5448 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 5449 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 5450 QualType(RHSOPT,0), 5451 false); 5452 5453 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 5454 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 5455 if (LHS && RHS) { // We have 2 user-defined types. 5456 if (LHS != RHS) { 5457 if (LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 5458 return BlockReturnType; 5459 if (RHS->getDecl()->isSuperClassOf(LHS->getDecl())) 5460 return !BlockReturnType; 5461 } 5462 else 5463 return true; 5464 } 5465 return false; 5466} 5467 5468/// getIntersectionOfProtocols - This routine finds the intersection of set 5469/// of protocols inherited from two distinct objective-c pointer objects. 5470/// It is used to build composite qualifier list of the composite type of 5471/// the conditional expression involving two objective-c pointer objects. 5472static 5473void getIntersectionOfProtocols(ASTContext &Context, 5474 const ObjCObjectPointerType *LHSOPT, 5475 const ObjCObjectPointerType *RHSOPT, 5476 SmallVectorImpl<ObjCProtocolDecl *> &IntersectionOfProtocols) { 5477 5478 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 5479 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 5480 assert(LHS->getInterface() && "LHS must have an interface base"); 5481 assert(RHS->getInterface() && "RHS must have an interface base"); 5482 5483 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> InheritedProtocolSet; 5484 unsigned LHSNumProtocols = LHS->getNumProtocols(); 5485 if (LHSNumProtocols > 0) 5486 InheritedProtocolSet.insert(LHS->qual_begin(), LHS->qual_end()); 5487 else { 5488 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 5489 Context.CollectInheritedProtocols(LHS->getInterface(), 5490 LHSInheritedProtocols); 5491 InheritedProtocolSet.insert(LHSInheritedProtocols.begin(), 5492 LHSInheritedProtocols.end()); 5493 } 5494 5495 unsigned RHSNumProtocols = RHS->getNumProtocols(); 5496 if (RHSNumProtocols > 0) { 5497 ObjCProtocolDecl **RHSProtocols = 5498 const_cast<ObjCProtocolDecl **>(RHS->qual_begin()); 5499 for (unsigned i = 0; i < RHSNumProtocols; ++i) 5500 if (InheritedProtocolSet.count(RHSProtocols[i])) 5501 IntersectionOfProtocols.push_back(RHSProtocols[i]); 5502 } else { 5503 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> RHSInheritedProtocols; 5504 Context.CollectInheritedProtocols(RHS->getInterface(), 5505 RHSInheritedProtocols); 5506 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 5507 RHSInheritedProtocols.begin(), 5508 E = RHSInheritedProtocols.end(); I != E; ++I) 5509 if (InheritedProtocolSet.count((*I))) 5510 IntersectionOfProtocols.push_back((*I)); 5511 } 5512} 5513 5514/// areCommonBaseCompatible - Returns common base class of the two classes if 5515/// one found. Note that this is O'2 algorithm. But it will be called as the 5516/// last type comparison in a ?-exp of ObjC pointer types before a 5517/// warning is issued. So, its invokation is extremely rare. 5518QualType ASTContext::areCommonBaseCompatible( 5519 const ObjCObjectPointerType *Lptr, 5520 const ObjCObjectPointerType *Rptr) { 5521 const ObjCObjectType *LHS = Lptr->getObjectType(); 5522 const ObjCObjectType *RHS = Rptr->getObjectType(); 5523 const ObjCInterfaceDecl* LDecl = LHS->getInterface(); 5524 const ObjCInterfaceDecl* RDecl = RHS->getInterface(); 5525 if (!LDecl || !RDecl || (declaresSameEntity(LDecl, RDecl))) 5526 return QualType(); 5527 5528 do { 5529 LHS = cast<ObjCInterfaceType>(getObjCInterfaceType(LDecl)); 5530 if (canAssignObjCInterfaces(LHS, RHS)) { 5531 SmallVector<ObjCProtocolDecl *, 8> Protocols; 5532 getIntersectionOfProtocols(*this, Lptr, Rptr, Protocols); 5533 5534 QualType Result = QualType(LHS, 0); 5535 if (!Protocols.empty()) 5536 Result = getObjCObjectType(Result, Protocols.data(), Protocols.size()); 5537 Result = getObjCObjectPointerType(Result); 5538 return Result; 5539 } 5540 } while ((LDecl = LDecl->getSuperClass())); 5541 5542 return QualType(); 5543} 5544 5545bool ASTContext::canAssignObjCInterfaces(const ObjCObjectType *LHS, 5546 const ObjCObjectType *RHS) { 5547 assert(LHS->getInterface() && "LHS is not an interface type"); 5548 assert(RHS->getInterface() && "RHS is not an interface type"); 5549 5550 // Verify that the base decls are compatible: the RHS must be a subclass of 5551 // the LHS. 5552 if (!LHS->getInterface()->isSuperClassOf(RHS->getInterface())) 5553 return false; 5554 5555 // RHS must have a superset of the protocols in the LHS. If the LHS is not 5556 // protocol qualified at all, then we are good. 5557 if (LHS->getNumProtocols() == 0) 5558 return true; 5559 5560 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, 5561 // more detailed analysis is required. 5562 if (RHS->getNumProtocols() == 0) { 5563 // OK, if LHS is a superclass of RHS *and* 5564 // this superclass is assignment compatible with LHS. 5565 // false otherwise. 5566 bool IsSuperClass = 5567 LHS->getInterface()->isSuperClassOf(RHS->getInterface()); 5568 if (IsSuperClass) { 5569 // OK if conversion of LHS to SuperClass results in narrowing of types 5570 // ; i.e., SuperClass may implement at least one of the protocols 5571 // in LHS's protocol list. Example, SuperObj<P1> = lhs<P1,P2> is ok. 5572 // But not SuperObj<P1,P2,P3> = lhs<P1,P2>. 5573 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> SuperClassInheritedProtocols; 5574 CollectInheritedProtocols(RHS->getInterface(), SuperClassInheritedProtocols); 5575 // If super class has no protocols, it is not a match. 5576 if (SuperClassInheritedProtocols.empty()) 5577 return false; 5578 5579 for (ObjCObjectType::qual_iterator LHSPI = LHS->qual_begin(), 5580 LHSPE = LHS->qual_end(); 5581 LHSPI != LHSPE; LHSPI++) { 5582 bool SuperImplementsProtocol = false; 5583 ObjCProtocolDecl *LHSProto = (*LHSPI); 5584 5585 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 5586 SuperClassInheritedProtocols.begin(), 5587 E = SuperClassInheritedProtocols.end(); I != E; ++I) { 5588 ObjCProtocolDecl *SuperClassProto = (*I); 5589 if (SuperClassProto->lookupProtocolNamed(LHSProto->getIdentifier())) { 5590 SuperImplementsProtocol = true; 5591 break; 5592 } 5593 } 5594 if (!SuperImplementsProtocol) 5595 return false; 5596 } 5597 return true; 5598 } 5599 return false; 5600 } 5601 5602 for (ObjCObjectType::qual_iterator LHSPI = LHS->qual_begin(), 5603 LHSPE = LHS->qual_end(); 5604 LHSPI != LHSPE; LHSPI++) { 5605 bool RHSImplementsProtocol = false; 5606 5607 // If the RHS doesn't implement the protocol on the left, the types 5608 // are incompatible. 5609 for (ObjCObjectType::qual_iterator RHSPI = RHS->qual_begin(), 5610 RHSPE = RHS->qual_end(); 5611 RHSPI != RHSPE; RHSPI++) { 5612 if ((*RHSPI)->lookupProtocolNamed((*LHSPI)->getIdentifier())) { 5613 RHSImplementsProtocol = true; 5614 break; 5615 } 5616 } 5617 // FIXME: For better diagnostics, consider passing back the protocol name. 5618 if (!RHSImplementsProtocol) 5619 return false; 5620 } 5621 // The RHS implements all protocols listed on the LHS. 5622 return true; 5623} 5624 5625bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) { 5626 // get the "pointed to" types 5627 const ObjCObjectPointerType *LHSOPT = LHS->getAs<ObjCObjectPointerType>(); 5628 const ObjCObjectPointerType *RHSOPT = RHS->getAs<ObjCObjectPointerType>(); 5629 5630 if (!LHSOPT || !RHSOPT) 5631 return false; 5632 5633 return canAssignObjCInterfaces(LHSOPT, RHSOPT) || 5634 canAssignObjCInterfaces(RHSOPT, LHSOPT); 5635} 5636 5637bool ASTContext::canBindObjCObjectType(QualType To, QualType From) { 5638 return canAssignObjCInterfaces( 5639 getObjCObjectPointerType(To)->getAs<ObjCObjectPointerType>(), 5640 getObjCObjectPointerType(From)->getAs<ObjCObjectPointerType>()); 5641} 5642 5643/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible, 5644/// both shall have the identically qualified version of a compatible type. 5645/// C99 6.2.7p1: Two types have compatible types if their types are the 5646/// same. See 6.7.[2,3,5] for additional rules. 5647bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS, 5648 bool CompareUnqualified) { 5649 if (getLangOptions().CPlusPlus) 5650 return hasSameType(LHS, RHS); 5651 5652 return !mergeTypes(LHS, RHS, false, CompareUnqualified).isNull(); 5653} 5654 5655bool ASTContext::propertyTypesAreCompatible(QualType LHS, QualType RHS) { 5656 return typesAreCompatible(LHS, RHS); 5657} 5658 5659bool ASTContext::typesAreBlockPointerCompatible(QualType LHS, QualType RHS) { 5660 return !mergeTypes(LHS, RHS, true).isNull(); 5661} 5662 5663/// mergeTransparentUnionType - if T is a transparent union type and a member 5664/// of T is compatible with SubType, return the merged type, else return 5665/// QualType() 5666QualType ASTContext::mergeTransparentUnionType(QualType T, QualType SubType, 5667 bool OfBlockPointer, 5668 bool Unqualified) { 5669 if (const RecordType *UT = T->getAsUnionType()) { 5670 RecordDecl *UD = UT->getDecl(); 5671 if (UD->hasAttr<TransparentUnionAttr>()) { 5672 for (RecordDecl::field_iterator it = UD->field_begin(), 5673 itend = UD->field_end(); it != itend; ++it) { 5674 QualType ET = it->getType().getUnqualifiedType(); 5675 QualType MT = mergeTypes(ET, SubType, OfBlockPointer, Unqualified); 5676 if (!MT.isNull()) 5677 return MT; 5678 } 5679 } 5680 } 5681 5682 return QualType(); 5683} 5684 5685/// mergeFunctionArgumentTypes - merge two types which appear as function 5686/// argument types 5687QualType ASTContext::mergeFunctionArgumentTypes(QualType lhs, QualType rhs, 5688 bool OfBlockPointer, 5689 bool Unqualified) { 5690 // GNU extension: two types are compatible if they appear as a function 5691 // argument, one of the types is a transparent union type and the other 5692 // type is compatible with a union member 5693 QualType lmerge = mergeTransparentUnionType(lhs, rhs, OfBlockPointer, 5694 Unqualified); 5695 if (!lmerge.isNull()) 5696 return lmerge; 5697 5698 QualType rmerge = mergeTransparentUnionType(rhs, lhs, OfBlockPointer, 5699 Unqualified); 5700 if (!rmerge.isNull()) 5701 return rmerge; 5702 5703 return mergeTypes(lhs, rhs, OfBlockPointer, Unqualified); 5704} 5705 5706QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs, 5707 bool OfBlockPointer, 5708 bool Unqualified) { 5709 const FunctionType *lbase = lhs->getAs<FunctionType>(); 5710 const FunctionType *rbase = rhs->getAs<FunctionType>(); 5711 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 5712 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 5713 bool allLTypes = true; 5714 bool allRTypes = true; 5715 5716 // Check return type 5717 QualType retType; 5718 if (OfBlockPointer) { 5719 QualType RHS = rbase->getResultType(); 5720 QualType LHS = lbase->getResultType(); 5721 bool UnqualifiedResult = Unqualified; 5722 if (!UnqualifiedResult) 5723 UnqualifiedResult = (!RHS.hasQualifiers() && LHS.hasQualifiers()); 5724 retType = mergeTypes(LHS, RHS, true, UnqualifiedResult, true); 5725 } 5726 else 5727 retType = mergeTypes(lbase->getResultType(), rbase->getResultType(), false, 5728 Unqualified); 5729 if (retType.isNull()) return QualType(); 5730 5731 if (Unqualified) 5732 retType = retType.getUnqualifiedType(); 5733 5734 CanQualType LRetType = getCanonicalType(lbase->getResultType()); 5735 CanQualType RRetType = getCanonicalType(rbase->getResultType()); 5736 if (Unqualified) { 5737 LRetType = LRetType.getUnqualifiedType(); 5738 RRetType = RRetType.getUnqualifiedType(); 5739 } 5740 5741 if (getCanonicalType(retType) != LRetType) 5742 allLTypes = false; 5743 if (getCanonicalType(retType) != RRetType) 5744 allRTypes = false; 5745 5746 // FIXME: double check this 5747 // FIXME: should we error if lbase->getRegParmAttr() != 0 && 5748 // rbase->getRegParmAttr() != 0 && 5749 // lbase->getRegParmAttr() != rbase->getRegParmAttr()? 5750 FunctionType::ExtInfo lbaseInfo = lbase->getExtInfo(); 5751 FunctionType::ExtInfo rbaseInfo = rbase->getExtInfo(); 5752 5753 // Compatible functions must have compatible calling conventions 5754 if (!isSameCallConv(lbaseInfo.getCC(), rbaseInfo.getCC())) 5755 return QualType(); 5756 5757 // Regparm is part of the calling convention. 5758 if (lbaseInfo.getHasRegParm() != rbaseInfo.getHasRegParm()) 5759 return QualType(); 5760 if (lbaseInfo.getRegParm() != rbaseInfo.getRegParm()) 5761 return QualType(); 5762 5763 if (lbaseInfo.getProducesResult() != rbaseInfo.getProducesResult()) 5764 return QualType(); 5765 5766 // functypes which return are preferred over those that do not. 5767 if (lbaseInfo.getNoReturn() && !rbaseInfo.getNoReturn()) 5768 allLTypes = false; 5769 else if (!lbaseInfo.getNoReturn() && rbaseInfo.getNoReturn()) 5770 allRTypes = false; 5771 // FIXME: some uses, e.g. conditional exprs, really want this to be 'both'. 5772 bool NoReturn = lbaseInfo.getNoReturn() || rbaseInfo.getNoReturn(); 5773 5774 FunctionType::ExtInfo einfo = lbaseInfo.withNoReturn(NoReturn); 5775 5776 if (lproto && rproto) { // two C99 style function prototypes 5777 assert(!lproto->hasExceptionSpec() && !rproto->hasExceptionSpec() && 5778 "C++ shouldn't be here"); 5779 unsigned lproto_nargs = lproto->getNumArgs(); 5780 unsigned rproto_nargs = rproto->getNumArgs(); 5781 5782 // Compatible functions must have the same number of arguments 5783 if (lproto_nargs != rproto_nargs) 5784 return QualType(); 5785 5786 // Variadic and non-variadic functions aren't compatible 5787 if (lproto->isVariadic() != rproto->isVariadic()) 5788 return QualType(); 5789 5790 if (lproto->getTypeQuals() != rproto->getTypeQuals()) 5791 return QualType(); 5792 5793 if (LangOpts.ObjCAutoRefCount && 5794 !FunctionTypesMatchOnNSConsumedAttrs(rproto, lproto)) 5795 return QualType(); 5796 5797 // Check argument compatibility 5798 SmallVector<QualType, 10> types; 5799 for (unsigned i = 0; i < lproto_nargs; i++) { 5800 QualType largtype = lproto->getArgType(i).getUnqualifiedType(); 5801 QualType rargtype = rproto->getArgType(i).getUnqualifiedType(); 5802 QualType argtype = mergeFunctionArgumentTypes(largtype, rargtype, 5803 OfBlockPointer, 5804 Unqualified); 5805 if (argtype.isNull()) return QualType(); 5806 5807 if (Unqualified) 5808 argtype = argtype.getUnqualifiedType(); 5809 5810 types.push_back(argtype); 5811 if (Unqualified) { 5812 largtype = largtype.getUnqualifiedType(); 5813 rargtype = rargtype.getUnqualifiedType(); 5814 } 5815 5816 if (getCanonicalType(argtype) != getCanonicalType(largtype)) 5817 allLTypes = false; 5818 if (getCanonicalType(argtype) != getCanonicalType(rargtype)) 5819 allRTypes = false; 5820 } 5821 5822 if (allLTypes) return lhs; 5823 if (allRTypes) return rhs; 5824 5825 FunctionProtoType::ExtProtoInfo EPI = lproto->getExtProtoInfo(); 5826 EPI.ExtInfo = einfo; 5827 return getFunctionType(retType, types.begin(), types.size(), EPI); 5828 } 5829 5830 if (lproto) allRTypes = false; 5831 if (rproto) allLTypes = false; 5832 5833 const FunctionProtoType *proto = lproto ? lproto : rproto; 5834 if (proto) { 5835 assert(!proto->hasExceptionSpec() && "C++ shouldn't be here"); 5836 if (proto->isVariadic()) return QualType(); 5837 // Check that the types are compatible with the types that 5838 // would result from default argument promotions (C99 6.7.5.3p15). 5839 // The only types actually affected are promotable integer 5840 // types and floats, which would be passed as a different 5841 // type depending on whether the prototype is visible. 5842 unsigned proto_nargs = proto->getNumArgs(); 5843 for (unsigned i = 0; i < proto_nargs; ++i) { 5844 QualType argTy = proto->getArgType(i); 5845 5846 // Look at the promotion type of enum types, since that is the type used 5847 // to pass enum values. 5848 if (const EnumType *Enum = argTy->getAs<EnumType>()) 5849 argTy = Enum->getDecl()->getPromotionType(); 5850 5851 if (argTy->isPromotableIntegerType() || 5852 getCanonicalType(argTy).getUnqualifiedType() == FloatTy) 5853 return QualType(); 5854 } 5855 5856 if (allLTypes) return lhs; 5857 if (allRTypes) return rhs; 5858 5859 FunctionProtoType::ExtProtoInfo EPI = proto->getExtProtoInfo(); 5860 EPI.ExtInfo = einfo; 5861 return getFunctionType(retType, proto->arg_type_begin(), 5862 proto->getNumArgs(), EPI); 5863 } 5864 5865 if (allLTypes) return lhs; 5866 if (allRTypes) return rhs; 5867 return getFunctionNoProtoType(retType, einfo); 5868} 5869 5870QualType ASTContext::mergeTypes(QualType LHS, QualType RHS, 5871 bool OfBlockPointer, 5872 bool Unqualified, bool BlockReturnType) { 5873 // C++ [expr]: If an expression initially has the type "reference to T", the 5874 // type is adjusted to "T" prior to any further analysis, the expression 5875 // designates the object or function denoted by the reference, and the 5876 // expression is an lvalue unless the reference is an rvalue reference and 5877 // the expression is a function call (possibly inside parentheses). 5878 assert(!LHS->getAs<ReferenceType>() && "LHS is a reference type?"); 5879 assert(!RHS->getAs<ReferenceType>() && "RHS is a reference type?"); 5880 5881 if (Unqualified) { 5882 LHS = LHS.getUnqualifiedType(); 5883 RHS = RHS.getUnqualifiedType(); 5884 } 5885 5886 QualType LHSCan = getCanonicalType(LHS), 5887 RHSCan = getCanonicalType(RHS); 5888 5889 // If two types are identical, they are compatible. 5890 if (LHSCan == RHSCan) 5891 return LHS; 5892 5893 // If the qualifiers are different, the types aren't compatible... mostly. 5894 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 5895 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 5896 if (LQuals != RQuals) { 5897 // If any of these qualifiers are different, we have a type 5898 // mismatch. 5899 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 5900 LQuals.getAddressSpace() != RQuals.getAddressSpace() || 5901 LQuals.getObjCLifetime() != RQuals.getObjCLifetime()) 5902 return QualType(); 5903 5904 // Exactly one GC qualifier difference is allowed: __strong is 5905 // okay if the other type has no GC qualifier but is an Objective 5906 // C object pointer (i.e. implicitly strong by default). We fix 5907 // this by pretending that the unqualified type was actually 5908 // qualified __strong. 5909 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 5910 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 5911 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 5912 5913 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 5914 return QualType(); 5915 5916 if (GC_L == Qualifiers::Strong && RHSCan->isObjCObjectPointerType()) { 5917 return mergeTypes(LHS, getObjCGCQualType(RHS, Qualifiers::Strong)); 5918 } 5919 if (GC_R == Qualifiers::Strong && LHSCan->isObjCObjectPointerType()) { 5920 return mergeTypes(getObjCGCQualType(LHS, Qualifiers::Strong), RHS); 5921 } 5922 return QualType(); 5923 } 5924 5925 // Okay, qualifiers are equal. 5926 5927 Type::TypeClass LHSClass = LHSCan->getTypeClass(); 5928 Type::TypeClass RHSClass = RHSCan->getTypeClass(); 5929 5930 // We want to consider the two function types to be the same for these 5931 // comparisons, just force one to the other. 5932 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto; 5933 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto; 5934 5935 // Same as above for arrays 5936 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray) 5937 LHSClass = Type::ConstantArray; 5938 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray) 5939 RHSClass = Type::ConstantArray; 5940 5941 // ObjCInterfaces are just specialized ObjCObjects. 5942 if (LHSClass == Type::ObjCInterface) LHSClass = Type::ObjCObject; 5943 if (RHSClass == Type::ObjCInterface) RHSClass = Type::ObjCObject; 5944 5945 // Canonicalize ExtVector -> Vector. 5946 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector; 5947 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector; 5948 5949 // If the canonical type classes don't match. 5950 if (LHSClass != RHSClass) { 5951 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char, 5952 // a signed integer type, or an unsigned integer type. 5953 // Compatibility is based on the underlying type, not the promotion 5954 // type. 5955 if (const EnumType* ETy = LHS->getAs<EnumType>()) { 5956 QualType TINT = ETy->getDecl()->getIntegerType(); 5957 if (!TINT.isNull() && hasSameType(TINT, RHSCan.getUnqualifiedType())) 5958 return RHS; 5959 } 5960 if (const EnumType* ETy = RHS->getAs<EnumType>()) { 5961 QualType TINT = ETy->getDecl()->getIntegerType(); 5962 if (!TINT.isNull() && hasSameType(TINT, LHSCan.getUnqualifiedType())) 5963 return LHS; 5964 } 5965 // allow block pointer type to match an 'id' type. 5966 if (OfBlockPointer && !BlockReturnType) { 5967 if (LHS->isObjCIdType() && RHS->isBlockPointerType()) 5968 return LHS; 5969 if (RHS->isObjCIdType() && LHS->isBlockPointerType()) 5970 return RHS; 5971 } 5972 5973 return QualType(); 5974 } 5975 5976 // The canonical type classes match. 5977 switch (LHSClass) { 5978#define TYPE(Class, Base) 5979#define ABSTRACT_TYPE(Class, Base) 5980#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) case Type::Class: 5981#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 5982#define DEPENDENT_TYPE(Class, Base) case Type::Class: 5983#include "clang/AST/TypeNodes.def" 5984 llvm_unreachable("Non-canonical and dependent types shouldn't get here"); 5985 5986 case Type::LValueReference: 5987 case Type::RValueReference: 5988 case Type::MemberPointer: 5989 llvm_unreachable("C++ should never be in mergeTypes"); 5990 5991 case Type::ObjCInterface: 5992 case Type::IncompleteArray: 5993 case Type::VariableArray: 5994 case Type::FunctionProto: 5995 case Type::ExtVector: 5996 llvm_unreachable("Types are eliminated above"); 5997 5998 case Type::Pointer: 5999 { 6000 // Merge two pointer types, while trying to preserve typedef info 6001 QualType LHSPointee = LHS->getAs<PointerType>()->getPointeeType(); 6002 QualType RHSPointee = RHS->getAs<PointerType>()->getPointeeType(); 6003 if (Unqualified) { 6004 LHSPointee = LHSPointee.getUnqualifiedType(); 6005 RHSPointee = RHSPointee.getUnqualifiedType(); 6006 } 6007 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, false, 6008 Unqualified); 6009 if (ResultType.isNull()) return QualType(); 6010 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 6011 return LHS; 6012 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 6013 return RHS; 6014 return getPointerType(ResultType); 6015 } 6016 case Type::BlockPointer: 6017 { 6018 // Merge two block pointer types, while trying to preserve typedef info 6019 QualType LHSPointee = LHS->getAs<BlockPointerType>()->getPointeeType(); 6020 QualType RHSPointee = RHS->getAs<BlockPointerType>()->getPointeeType(); 6021 if (Unqualified) { 6022 LHSPointee = LHSPointee.getUnqualifiedType(); 6023 RHSPointee = RHSPointee.getUnqualifiedType(); 6024 } 6025 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, OfBlockPointer, 6026 Unqualified); 6027 if (ResultType.isNull()) return QualType(); 6028 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 6029 return LHS; 6030 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 6031 return RHS; 6032 return getBlockPointerType(ResultType); 6033 } 6034 case Type::Atomic: 6035 { 6036 // Merge two pointer types, while trying to preserve typedef info 6037 QualType LHSValue = LHS->getAs<AtomicType>()->getValueType(); 6038 QualType RHSValue = RHS->getAs<AtomicType>()->getValueType(); 6039 if (Unqualified) { 6040 LHSValue = LHSValue.getUnqualifiedType(); 6041 RHSValue = RHSValue.getUnqualifiedType(); 6042 } 6043 QualType ResultType = mergeTypes(LHSValue, RHSValue, false, 6044 Unqualified); 6045 if (ResultType.isNull()) return QualType(); 6046 if (getCanonicalType(LHSValue) == getCanonicalType(ResultType)) 6047 return LHS; 6048 if (getCanonicalType(RHSValue) == getCanonicalType(ResultType)) 6049 return RHS; 6050 return getAtomicType(ResultType); 6051 } 6052 case Type::ConstantArray: 6053 { 6054 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS); 6055 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS); 6056 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize()) 6057 return QualType(); 6058 6059 QualType LHSElem = getAsArrayType(LHS)->getElementType(); 6060 QualType RHSElem = getAsArrayType(RHS)->getElementType(); 6061 if (Unqualified) { 6062 LHSElem = LHSElem.getUnqualifiedType(); 6063 RHSElem = RHSElem.getUnqualifiedType(); 6064 } 6065 6066 QualType ResultType = mergeTypes(LHSElem, RHSElem, false, Unqualified); 6067 if (ResultType.isNull()) return QualType(); 6068 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 6069 return LHS; 6070 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 6071 return RHS; 6072 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(), 6073 ArrayType::ArraySizeModifier(), 0); 6074 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(), 6075 ArrayType::ArraySizeModifier(), 0); 6076 const VariableArrayType* LVAT = getAsVariableArrayType(LHS); 6077 const VariableArrayType* RVAT = getAsVariableArrayType(RHS); 6078 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 6079 return LHS; 6080 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 6081 return RHS; 6082 if (LVAT) { 6083 // FIXME: This isn't correct! But tricky to implement because 6084 // the array's size has to be the size of LHS, but the type 6085 // has to be different. 6086 return LHS; 6087 } 6088 if (RVAT) { 6089 // FIXME: This isn't correct! But tricky to implement because 6090 // the array's size has to be the size of RHS, but the type 6091 // has to be different. 6092 return RHS; 6093 } 6094 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS; 6095 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS; 6096 return getIncompleteArrayType(ResultType, 6097 ArrayType::ArraySizeModifier(), 0); 6098 } 6099 case Type::FunctionNoProto: 6100 return mergeFunctionTypes(LHS, RHS, OfBlockPointer, Unqualified); 6101 case Type::Record: 6102 case Type::Enum: 6103 return QualType(); 6104 case Type::Builtin: 6105 // Only exactly equal builtin types are compatible, which is tested above. 6106 return QualType(); 6107 case Type::Complex: 6108 // Distinct complex types are incompatible. 6109 return QualType(); 6110 case Type::Vector: 6111 // FIXME: The merged type should be an ExtVector! 6112 if (areCompatVectorTypes(LHSCan->getAs<VectorType>(), 6113 RHSCan->getAs<VectorType>())) 6114 return LHS; 6115 return QualType(); 6116 case Type::ObjCObject: { 6117 // Check if the types are assignment compatible. 6118 // FIXME: This should be type compatibility, e.g. whether 6119 // "LHS x; RHS x;" at global scope is legal. 6120 const ObjCObjectType* LHSIface = LHS->getAs<ObjCObjectType>(); 6121 const ObjCObjectType* RHSIface = RHS->getAs<ObjCObjectType>(); 6122 if (canAssignObjCInterfaces(LHSIface, RHSIface)) 6123 return LHS; 6124 6125 return QualType(); 6126 } 6127 case Type::ObjCObjectPointer: { 6128 if (OfBlockPointer) { 6129 if (canAssignObjCInterfacesInBlockPointer( 6130 LHS->getAs<ObjCObjectPointerType>(), 6131 RHS->getAs<ObjCObjectPointerType>(), 6132 BlockReturnType)) 6133 return LHS; 6134 return QualType(); 6135 } 6136 if (canAssignObjCInterfaces(LHS->getAs<ObjCObjectPointerType>(), 6137 RHS->getAs<ObjCObjectPointerType>())) 6138 return LHS; 6139 6140 return QualType(); 6141 } 6142 } 6143 6144 llvm_unreachable("Invalid Type::Class!"); 6145} 6146 6147bool ASTContext::FunctionTypesMatchOnNSConsumedAttrs( 6148 const FunctionProtoType *FromFunctionType, 6149 const FunctionProtoType *ToFunctionType) { 6150 if (FromFunctionType->hasAnyConsumedArgs() != 6151 ToFunctionType->hasAnyConsumedArgs()) 6152 return false; 6153 FunctionProtoType::ExtProtoInfo FromEPI = 6154 FromFunctionType->getExtProtoInfo(); 6155 FunctionProtoType::ExtProtoInfo ToEPI = 6156 ToFunctionType->getExtProtoInfo(); 6157 if (FromEPI.ConsumedArguments && ToEPI.ConsumedArguments) 6158 for (unsigned ArgIdx = 0, NumArgs = FromFunctionType->getNumArgs(); 6159 ArgIdx != NumArgs; ++ArgIdx) { 6160 if (FromEPI.ConsumedArguments[ArgIdx] != 6161 ToEPI.ConsumedArguments[ArgIdx]) 6162 return false; 6163 } 6164 return true; 6165} 6166 6167/// mergeObjCGCQualifiers - This routine merges ObjC's GC attribute of 'LHS' and 6168/// 'RHS' attributes and returns the merged version; including for function 6169/// return types. 6170QualType ASTContext::mergeObjCGCQualifiers(QualType LHS, QualType RHS) { 6171 QualType LHSCan = getCanonicalType(LHS), 6172 RHSCan = getCanonicalType(RHS); 6173 // If two types are identical, they are compatible. 6174 if (LHSCan == RHSCan) 6175 return LHS; 6176 if (RHSCan->isFunctionType()) { 6177 if (!LHSCan->isFunctionType()) 6178 return QualType(); 6179 QualType OldReturnType = 6180 cast<FunctionType>(RHSCan.getTypePtr())->getResultType(); 6181 QualType NewReturnType = 6182 cast<FunctionType>(LHSCan.getTypePtr())->getResultType(); 6183 QualType ResReturnType = 6184 mergeObjCGCQualifiers(NewReturnType, OldReturnType); 6185 if (ResReturnType.isNull()) 6186 return QualType(); 6187 if (ResReturnType == NewReturnType || ResReturnType == OldReturnType) { 6188 // id foo(); ... __strong id foo(); or: __strong id foo(); ... id foo(); 6189 // In either case, use OldReturnType to build the new function type. 6190 const FunctionType *F = LHS->getAs<FunctionType>(); 6191 if (const FunctionProtoType *FPT = cast<FunctionProtoType>(F)) { 6192 FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); 6193 EPI.ExtInfo = getFunctionExtInfo(LHS); 6194 QualType ResultType 6195 = getFunctionType(OldReturnType, FPT->arg_type_begin(), 6196 FPT->getNumArgs(), EPI); 6197 return ResultType; 6198 } 6199 } 6200 return QualType(); 6201 } 6202 6203 // If the qualifiers are different, the types can still be merged. 6204 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 6205 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 6206 if (LQuals != RQuals) { 6207 // If any of these qualifiers are different, we have a type mismatch. 6208 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 6209 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 6210 return QualType(); 6211 6212 // Exactly one GC qualifier difference is allowed: __strong is 6213 // okay if the other type has no GC qualifier but is an Objective 6214 // C object pointer (i.e. implicitly strong by default). We fix 6215 // this by pretending that the unqualified type was actually 6216 // qualified __strong. 6217 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 6218 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 6219 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 6220 6221 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 6222 return QualType(); 6223 6224 if (GC_L == Qualifiers::Strong) 6225 return LHS; 6226 if (GC_R == Qualifiers::Strong) 6227 return RHS; 6228 return QualType(); 6229 } 6230 6231 if (LHSCan->isObjCObjectPointerType() && RHSCan->isObjCObjectPointerType()) { 6232 QualType LHSBaseQT = LHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 6233 QualType RHSBaseQT = RHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 6234 QualType ResQT = mergeObjCGCQualifiers(LHSBaseQT, RHSBaseQT); 6235 if (ResQT == LHSBaseQT) 6236 return LHS; 6237 if (ResQT == RHSBaseQT) 6238 return RHS; 6239 } 6240 return QualType(); 6241} 6242 6243//===----------------------------------------------------------------------===// 6244// Integer Predicates 6245//===----------------------------------------------------------------------===// 6246 6247unsigned ASTContext::getIntWidth(QualType T) const { 6248 if (const EnumType *ET = dyn_cast<EnumType>(T)) 6249 T = ET->getDecl()->getIntegerType(); 6250 if (T->isBooleanType()) 6251 return 1; 6252 // For builtin types, just use the standard type sizing method 6253 return (unsigned)getTypeSize(T); 6254} 6255 6256QualType ASTContext::getCorrespondingUnsignedType(QualType T) { 6257 assert(T->hasSignedIntegerRepresentation() && "Unexpected type"); 6258 6259 // Turn <4 x signed int> -> <4 x unsigned int> 6260 if (const VectorType *VTy = T->getAs<VectorType>()) 6261 return getVectorType(getCorrespondingUnsignedType(VTy->getElementType()), 6262 VTy->getNumElements(), VTy->getVectorKind()); 6263 6264 // For enums, we return the unsigned version of the base type. 6265 if (const EnumType *ETy = T->getAs<EnumType>()) 6266 T = ETy->getDecl()->getIntegerType(); 6267 6268 const BuiltinType *BTy = T->getAs<BuiltinType>(); 6269 assert(BTy && "Unexpected signed integer type"); 6270 switch (BTy->getKind()) { 6271 case BuiltinType::Char_S: 6272 case BuiltinType::SChar: 6273 return UnsignedCharTy; 6274 case BuiltinType::Short: 6275 return UnsignedShortTy; 6276 case BuiltinType::Int: 6277 return UnsignedIntTy; 6278 case BuiltinType::Long: 6279 return UnsignedLongTy; 6280 case BuiltinType::LongLong: 6281 return UnsignedLongLongTy; 6282 case BuiltinType::Int128: 6283 return UnsignedInt128Ty; 6284 default: 6285 llvm_unreachable("Unexpected signed integer type"); 6286 } 6287} 6288 6289ASTMutationListener::~ASTMutationListener() { } 6290 6291 6292//===----------------------------------------------------------------------===// 6293// Builtin Type Computation 6294//===----------------------------------------------------------------------===// 6295 6296/// DecodeTypeFromStr - This decodes one type descriptor from Str, advancing the 6297/// pointer over the consumed characters. This returns the resultant type. If 6298/// AllowTypeModifiers is false then modifier like * are not parsed, just basic 6299/// types. This allows "v2i*" to be parsed as a pointer to a v2i instead of 6300/// a vector of "i*". 6301/// 6302/// RequiresICE is filled in on return to indicate whether the value is required 6303/// to be an Integer Constant Expression. 6304static QualType DecodeTypeFromStr(const char *&Str, const ASTContext &Context, 6305 ASTContext::GetBuiltinTypeError &Error, 6306 bool &RequiresICE, 6307 bool AllowTypeModifiers) { 6308 // Modifiers. 6309 int HowLong = 0; 6310 bool Signed = false, Unsigned = false; 6311 RequiresICE = false; 6312 6313 // Read the prefixed modifiers first. 6314 bool Done = false; 6315 while (!Done) { 6316 switch (*Str++) { 6317 default: Done = true; --Str; break; 6318 case 'I': 6319 RequiresICE = true; 6320 break; 6321 case 'S': 6322 assert(!Unsigned && "Can't use both 'S' and 'U' modifiers!"); 6323 assert(!Signed && "Can't use 'S' modifier multiple times!"); 6324 Signed = true; 6325 break; 6326 case 'U': 6327 assert(!Signed && "Can't use both 'S' and 'U' modifiers!"); 6328 assert(!Unsigned && "Can't use 'S' modifier multiple times!"); 6329 Unsigned = true; 6330 break; 6331 case 'L': 6332 assert(HowLong <= 2 && "Can't have LLLL modifier"); 6333 ++HowLong; 6334 break; 6335 } 6336 } 6337 6338 QualType Type; 6339 6340 // Read the base type. 6341 switch (*Str++) { 6342 default: llvm_unreachable("Unknown builtin type letter!"); 6343 case 'v': 6344 assert(HowLong == 0 && !Signed && !Unsigned && 6345 "Bad modifiers used with 'v'!"); 6346 Type = Context.VoidTy; 6347 break; 6348 case 'f': 6349 assert(HowLong == 0 && !Signed && !Unsigned && 6350 "Bad modifiers used with 'f'!"); 6351 Type = Context.FloatTy; 6352 break; 6353 case 'd': 6354 assert(HowLong < 2 && !Signed && !Unsigned && 6355 "Bad modifiers used with 'd'!"); 6356 if (HowLong) 6357 Type = Context.LongDoubleTy; 6358 else 6359 Type = Context.DoubleTy; 6360 break; 6361 case 's': 6362 assert(HowLong == 0 && "Bad modifiers used with 's'!"); 6363 if (Unsigned) 6364 Type = Context.UnsignedShortTy; 6365 else 6366 Type = Context.ShortTy; 6367 break; 6368 case 'i': 6369 if (HowLong == 3) 6370 Type = Unsigned ? Context.UnsignedInt128Ty : Context.Int128Ty; 6371 else if (HowLong == 2) 6372 Type = Unsigned ? Context.UnsignedLongLongTy : Context.LongLongTy; 6373 else if (HowLong == 1) 6374 Type = Unsigned ? Context.UnsignedLongTy : Context.LongTy; 6375 else 6376 Type = Unsigned ? Context.UnsignedIntTy : Context.IntTy; 6377 break; 6378 case 'c': 6379 assert(HowLong == 0 && "Bad modifiers used with 'c'!"); 6380 if (Signed) 6381 Type = Context.SignedCharTy; 6382 else if (Unsigned) 6383 Type = Context.UnsignedCharTy; 6384 else 6385 Type = Context.CharTy; 6386 break; 6387 case 'b': // boolean 6388 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'b'!"); 6389 Type = Context.BoolTy; 6390 break; 6391 case 'z': // size_t. 6392 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'z'!"); 6393 Type = Context.getSizeType(); 6394 break; 6395 case 'F': 6396 Type = Context.getCFConstantStringType(); 6397 break; 6398 case 'G': 6399 Type = Context.getObjCIdType(); 6400 break; 6401 case 'H': 6402 Type = Context.getObjCSelType(); 6403 break; 6404 case 'a': 6405 Type = Context.getBuiltinVaListType(); 6406 assert(!Type.isNull() && "builtin va list type not initialized!"); 6407 break; 6408 case 'A': 6409 // This is a "reference" to a va_list; however, what exactly 6410 // this means depends on how va_list is defined. There are two 6411 // different kinds of va_list: ones passed by value, and ones 6412 // passed by reference. An example of a by-value va_list is 6413 // x86, where va_list is a char*. An example of by-ref va_list 6414 // is x86-64, where va_list is a __va_list_tag[1]. For x86, 6415 // we want this argument to be a char*&; for x86-64, we want 6416 // it to be a __va_list_tag*. 6417 Type = Context.getBuiltinVaListType(); 6418 assert(!Type.isNull() && "builtin va list type not initialized!"); 6419 if (Type->isArrayType()) 6420 Type = Context.getArrayDecayedType(Type); 6421 else 6422 Type = Context.getLValueReferenceType(Type); 6423 break; 6424 case 'V': { 6425 char *End; 6426 unsigned NumElements = strtoul(Str, &End, 10); 6427 assert(End != Str && "Missing vector size"); 6428 Str = End; 6429 6430 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, 6431 RequiresICE, false); 6432 assert(!RequiresICE && "Can't require vector ICE"); 6433 6434 // TODO: No way to make AltiVec vectors in builtins yet. 6435 Type = Context.getVectorType(ElementType, NumElements, 6436 VectorType::GenericVector); 6437 break; 6438 } 6439 case 'X': { 6440 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, RequiresICE, 6441 false); 6442 assert(!RequiresICE && "Can't require complex ICE"); 6443 Type = Context.getComplexType(ElementType); 6444 break; 6445 } 6446 case 'Y' : { 6447 Type = Context.getPointerDiffType(); 6448 break; 6449 } 6450 case 'P': 6451 Type = Context.getFILEType(); 6452 if (Type.isNull()) { 6453 Error = ASTContext::GE_Missing_stdio; 6454 return QualType(); 6455 } 6456 break; 6457 case 'J': 6458 if (Signed) 6459 Type = Context.getsigjmp_bufType(); 6460 else 6461 Type = Context.getjmp_bufType(); 6462 6463 if (Type.isNull()) { 6464 Error = ASTContext::GE_Missing_setjmp; 6465 return QualType(); 6466 } 6467 break; 6468 case 'K': 6469 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'K'!"); 6470 Type = Context.getucontext_tType(); 6471 6472 if (Type.isNull()) { 6473 Error = ASTContext::GE_Missing_ucontext; 6474 return QualType(); 6475 } 6476 break; 6477 } 6478 6479 // If there are modifiers and if we're allowed to parse them, go for it. 6480 Done = !AllowTypeModifiers; 6481 while (!Done) { 6482 switch (char c = *Str++) { 6483 default: Done = true; --Str; break; 6484 case '*': 6485 case '&': { 6486 // Both pointers and references can have their pointee types 6487 // qualified with an address space. 6488 char *End; 6489 unsigned AddrSpace = strtoul(Str, &End, 10); 6490 if (End != Str && AddrSpace != 0) { 6491 Type = Context.getAddrSpaceQualType(Type, AddrSpace); 6492 Str = End; 6493 } 6494 if (c == '*') 6495 Type = Context.getPointerType(Type); 6496 else 6497 Type = Context.getLValueReferenceType(Type); 6498 break; 6499 } 6500 // FIXME: There's no way to have a built-in with an rvalue ref arg. 6501 case 'C': 6502 Type = Type.withConst(); 6503 break; 6504 case 'D': 6505 Type = Context.getVolatileType(Type); 6506 break; 6507 case 'R': 6508 Type = Type.withRestrict(); 6509 break; 6510 } 6511 } 6512 6513 assert((!RequiresICE || Type->isIntegralOrEnumerationType()) && 6514 "Integer constant 'I' type must be an integer"); 6515 6516 return Type; 6517} 6518 6519/// GetBuiltinType - Return the type for the specified builtin. 6520QualType ASTContext::GetBuiltinType(unsigned Id, 6521 GetBuiltinTypeError &Error, 6522 unsigned *IntegerConstantArgs) const { 6523 const char *TypeStr = BuiltinInfo.GetTypeString(Id); 6524 6525 SmallVector<QualType, 8> ArgTypes; 6526 6527 bool RequiresICE = false; 6528 Error = GE_None; 6529 QualType ResType = DecodeTypeFromStr(TypeStr, *this, Error, 6530 RequiresICE, true); 6531 if (Error != GE_None) 6532 return QualType(); 6533 6534 assert(!RequiresICE && "Result of intrinsic cannot be required to be an ICE"); 6535 6536 while (TypeStr[0] && TypeStr[0] != '.') { 6537 QualType Ty = DecodeTypeFromStr(TypeStr, *this, Error, RequiresICE, true); 6538 if (Error != GE_None) 6539 return QualType(); 6540 6541 // If this argument is required to be an IntegerConstantExpression and the 6542 // caller cares, fill in the bitmask we return. 6543 if (RequiresICE && IntegerConstantArgs) 6544 *IntegerConstantArgs |= 1 << ArgTypes.size(); 6545 6546 // Do array -> pointer decay. The builtin should use the decayed type. 6547 if (Ty->isArrayType()) 6548 Ty = getArrayDecayedType(Ty); 6549 6550 ArgTypes.push_back(Ty); 6551 } 6552 6553 assert((TypeStr[0] != '.' || TypeStr[1] == 0) && 6554 "'.' should only occur at end of builtin type list!"); 6555 6556 FunctionType::ExtInfo EI; 6557 if (BuiltinInfo.isNoReturn(Id)) EI = EI.withNoReturn(true); 6558 6559 bool Variadic = (TypeStr[0] == '.'); 6560 6561 // We really shouldn't be making a no-proto type here, especially in C++. 6562 if (ArgTypes.empty() && Variadic) 6563 return getFunctionNoProtoType(ResType, EI); 6564 6565 FunctionProtoType::ExtProtoInfo EPI; 6566 EPI.ExtInfo = EI; 6567 EPI.Variadic = Variadic; 6568 6569 return getFunctionType(ResType, ArgTypes.data(), ArgTypes.size(), EPI); 6570} 6571 6572GVALinkage ASTContext::GetGVALinkageForFunction(const FunctionDecl *FD) { 6573 GVALinkage External = GVA_StrongExternal; 6574 6575 Linkage L = FD->getLinkage(); 6576 switch (L) { 6577 case NoLinkage: 6578 case InternalLinkage: 6579 case UniqueExternalLinkage: 6580 return GVA_Internal; 6581 6582 case ExternalLinkage: 6583 switch (FD->getTemplateSpecializationKind()) { 6584 case TSK_Undeclared: 6585 case TSK_ExplicitSpecialization: 6586 External = GVA_StrongExternal; 6587 break; 6588 6589 case TSK_ExplicitInstantiationDefinition: 6590 return GVA_ExplicitTemplateInstantiation; 6591 6592 case TSK_ExplicitInstantiationDeclaration: 6593 case TSK_ImplicitInstantiation: 6594 External = GVA_TemplateInstantiation; 6595 break; 6596 } 6597 } 6598 6599 if (!FD->isInlined()) 6600 return External; 6601 6602 if (!getLangOptions().CPlusPlus || FD->hasAttr<GNUInlineAttr>()) { 6603 // GNU or C99 inline semantics. Determine whether this symbol should be 6604 // externally visible. 6605 if (FD->isInlineDefinitionExternallyVisible()) 6606 return External; 6607 6608 // C99 inline semantics, where the symbol is not externally visible. 6609 return GVA_C99Inline; 6610 } 6611 6612 // C++0x [temp.explicit]p9: 6613 // [ Note: The intent is that an inline function that is the subject of 6614 // an explicit instantiation declaration will still be implicitly 6615 // instantiated when used so that the body can be considered for 6616 // inlining, but that no out-of-line copy of the inline function would be 6617 // generated in the translation unit. -- end note ] 6618 if (FD->getTemplateSpecializationKind() 6619 == TSK_ExplicitInstantiationDeclaration) 6620 return GVA_C99Inline; 6621 6622 return GVA_CXXInline; 6623} 6624 6625GVALinkage ASTContext::GetGVALinkageForVariable(const VarDecl *VD) { 6626 // If this is a static data member, compute the kind of template 6627 // specialization. Otherwise, this variable is not part of a 6628 // template. 6629 TemplateSpecializationKind TSK = TSK_Undeclared; 6630 if (VD->isStaticDataMember()) 6631 TSK = VD->getTemplateSpecializationKind(); 6632 6633 Linkage L = VD->getLinkage(); 6634 if (L == ExternalLinkage && getLangOptions().CPlusPlus && 6635 VD->getType()->getLinkage() == UniqueExternalLinkage) 6636 L = UniqueExternalLinkage; 6637 6638 switch (L) { 6639 case NoLinkage: 6640 case InternalLinkage: 6641 case UniqueExternalLinkage: 6642 return GVA_Internal; 6643 6644 case ExternalLinkage: 6645 switch (TSK) { 6646 case TSK_Undeclared: 6647 case TSK_ExplicitSpecialization: 6648 return GVA_StrongExternal; 6649 6650 case TSK_ExplicitInstantiationDeclaration: 6651 llvm_unreachable("Variable should not be instantiated"); 6652 // Fall through to treat this like any other instantiation. 6653 6654 case TSK_ExplicitInstantiationDefinition: 6655 return GVA_ExplicitTemplateInstantiation; 6656 6657 case TSK_ImplicitInstantiation: 6658 return GVA_TemplateInstantiation; 6659 } 6660 } 6661 6662 llvm_unreachable("Invalid Linkage!"); 6663} 6664 6665bool ASTContext::DeclMustBeEmitted(const Decl *D) { 6666 if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { 6667 if (!VD->isFileVarDecl()) 6668 return false; 6669 } else if (!isa<FunctionDecl>(D)) 6670 return false; 6671 6672 // Weak references don't produce any output by themselves. 6673 if (D->hasAttr<WeakRefAttr>()) 6674 return false; 6675 6676 // Aliases and used decls are required. 6677 if (D->hasAttr<AliasAttr>() || D->hasAttr<UsedAttr>()) 6678 return true; 6679 6680 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 6681 // Forward declarations aren't required. 6682 if (!FD->doesThisDeclarationHaveABody()) 6683 return FD->doesDeclarationForceExternallyVisibleDefinition(); 6684 6685 // Constructors and destructors are required. 6686 if (FD->hasAttr<ConstructorAttr>() || FD->hasAttr<DestructorAttr>()) 6687 return true; 6688 6689 // The key function for a class is required. 6690 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { 6691 const CXXRecordDecl *RD = MD->getParent(); 6692 if (MD->isOutOfLine() && RD->isDynamicClass()) { 6693 const CXXMethodDecl *KeyFunc = getKeyFunction(RD); 6694 if (KeyFunc && KeyFunc->getCanonicalDecl() == MD->getCanonicalDecl()) 6695 return true; 6696 } 6697 } 6698 6699 GVALinkage Linkage = GetGVALinkageForFunction(FD); 6700 6701 // static, static inline, always_inline, and extern inline functions can 6702 // always be deferred. Normal inline functions can be deferred in C99/C++. 6703 // Implicit template instantiations can also be deferred in C++. 6704 if (Linkage == GVA_Internal || Linkage == GVA_C99Inline || 6705 Linkage == GVA_CXXInline || Linkage == GVA_TemplateInstantiation) 6706 return false; 6707 return true; 6708 } 6709 6710 const VarDecl *VD = cast<VarDecl>(D); 6711 assert(VD->isFileVarDecl() && "Expected file scoped var"); 6712 6713 if (VD->isThisDeclarationADefinition() == VarDecl::DeclarationOnly) 6714 return false; 6715 6716 // Structs that have non-trivial constructors or destructors are required. 6717 6718 // FIXME: Handle references. 6719 // FIXME: Be more selective about which constructors we care about. 6720 if (const RecordType *RT = VD->getType()->getAs<RecordType>()) { 6721 if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(RT->getDecl())) { 6722 if (RD->hasDefinition() && !(RD->hasTrivialDefaultConstructor() && 6723 RD->hasTrivialCopyConstructor() && 6724 RD->hasTrivialMoveConstructor() && 6725 RD->hasTrivialDestructor())) 6726 return true; 6727 } 6728 } 6729 6730 GVALinkage L = GetGVALinkageForVariable(VD); 6731 if (L == GVA_Internal || L == GVA_TemplateInstantiation) { 6732 if (!(VD->getInit() && VD->getInit()->HasSideEffects(*this))) 6733 return false; 6734 } 6735 6736 return true; 6737} 6738 6739CallingConv ASTContext::getDefaultMethodCallConv() { 6740 // Pass through to the C++ ABI object 6741 return ABI->getDefaultMethodCallConv(); 6742} 6743 6744bool ASTContext::isNearlyEmpty(const CXXRecordDecl *RD) const { 6745 // Pass through to the C++ ABI object 6746 return ABI->isNearlyEmpty(RD); 6747} 6748 6749MangleContext *ASTContext::createMangleContext() { 6750 switch (Target->getCXXABI()) { 6751 case CXXABI_ARM: 6752 case CXXABI_Itanium: 6753 return createItaniumMangleContext(*this, getDiagnostics()); 6754 case CXXABI_Microsoft: 6755 return createMicrosoftMangleContext(*this, getDiagnostics()); 6756 } 6757 llvm_unreachable("Unsupported ABI"); 6758} 6759 6760CXXABI::~CXXABI() {} 6761 6762size_t ASTContext::getSideTableAllocatedMemory() const { 6763 return ASTRecordLayouts.getMemorySize() 6764 + llvm::capacity_in_bytes(ObjCLayouts) 6765 + llvm::capacity_in_bytes(KeyFunctions) 6766 + llvm::capacity_in_bytes(ObjCImpls) 6767 + llvm::capacity_in_bytes(BlockVarCopyInits) 6768 + llvm::capacity_in_bytes(DeclAttrs) 6769 + llvm::capacity_in_bytes(InstantiatedFromStaticDataMember) 6770 + llvm::capacity_in_bytes(InstantiatedFromUsingDecl) 6771 + llvm::capacity_in_bytes(InstantiatedFromUsingShadowDecl) 6772 + llvm::capacity_in_bytes(InstantiatedFromUnnamedFieldDecl) 6773 + llvm::capacity_in_bytes(OverriddenMethods) 6774 + llvm::capacity_in_bytes(Types) 6775 + llvm::capacity_in_bytes(VariableArrayTypes) 6776 + llvm::capacity_in_bytes(ClassScopeSpecializationPattern); 6777} 6778 6779void ASTContext::setParameterIndex(const ParmVarDecl *D, unsigned int index) { 6780 ParamIndices[D] = index; 6781} 6782 6783unsigned ASTContext::getParameterIndex(const ParmVarDecl *D) const { 6784 ParameterIndexTable::const_iterator I = ParamIndices.find(D); 6785 assert(I != ParamIndices.end() && 6786 "ParmIndices lacks entry set by ParmVarDecl"); 6787 return I->second; 6788} 6789