ASTContext.cpp revision ef9b60ffed980864a8db26ad30344be429e58ff5
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 // Create a new allocator for partial diagnostics. 245 DiagAllocator = new (BumpAlloc) PartialDiagnosticStorageAllocator; 246 247 if (size_reserve > 0) Types.reserve(size_reserve); 248 TUDecl = TranslationUnitDecl::Create(*this); 249 250 if (!DelayInitialization) { 251 assert(t && "No target supplied for ASTContext initialization"); 252 InitBuiltinTypes(*t); 253 } 254} 255 256ASTContext::~ASTContext() { 257 // Release the DenseMaps associated with DeclContext objects. 258 // FIXME: Is this the ideal solution? 259 ReleaseDeclContextMaps(); 260 261 // Call all of the deallocation functions. 262 for (unsigned I = 0, N = Deallocations.size(); I != N; ++I) 263 Deallocations[I].first(Deallocations[I].second); 264 265 // Release all of the memory associated with overridden C++ methods. 266 for (llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::iterator 267 OM = OverriddenMethods.begin(), OMEnd = OverriddenMethods.end(); 268 OM != OMEnd; ++OM) 269 OM->second.Destroy(); 270 271 // ASTRecordLayout objects in ASTRecordLayouts must always be destroyed 272 // because they can contain DenseMaps. 273 for (llvm::DenseMap<const ObjCContainerDecl*, 274 const ASTRecordLayout*>::iterator 275 I = ObjCLayouts.begin(), E = ObjCLayouts.end(); I != E; ) 276 // Increment in loop to prevent using deallocated memory. 277 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 278 R->Destroy(*this); 279 280 for (llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*>::iterator 281 I = ASTRecordLayouts.begin(), E = ASTRecordLayouts.end(); I != E; ) { 282 // Increment in loop to prevent using deallocated memory. 283 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 284 R->Destroy(*this); 285 } 286 287 for (llvm::DenseMap<const Decl*, AttrVec*>::iterator A = DeclAttrs.begin(), 288 AEnd = DeclAttrs.end(); 289 A != AEnd; ++A) 290 A->second->~AttrVec(); 291 292 // Destroy the partial diagnostic allocator. 293 DiagAllocator->~PartialDiagnosticStorageAllocator(); 294} 295 296void ASTContext::AddDeallocation(void (*Callback)(void*), void *Data) { 297 Deallocations.push_back(std::make_pair(Callback, Data)); 298} 299 300void 301ASTContext::setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source) { 302 ExternalSource.reset(Source.take()); 303} 304 305void ASTContext::PrintStats() const { 306 llvm::errs() << "\n*** AST Context Stats:\n"; 307 llvm::errs() << " " << Types.size() << " types total.\n"; 308 309 unsigned counts[] = { 310#define TYPE(Name, Parent) 0, 311#define ABSTRACT_TYPE(Name, Parent) 312#include "clang/AST/TypeNodes.def" 313 0 // Extra 314 }; 315 316 for (unsigned i = 0, e = Types.size(); i != e; ++i) { 317 Type *T = Types[i]; 318 counts[(unsigned)T->getTypeClass()]++; 319 } 320 321 unsigned Idx = 0; 322 unsigned TotalBytes = 0; 323#define TYPE(Name, Parent) \ 324 if (counts[Idx]) \ 325 llvm::errs() << " " << counts[Idx] << " " << #Name \ 326 << " types\n"; \ 327 TotalBytes += counts[Idx] * sizeof(Name##Type); \ 328 ++Idx; 329#define ABSTRACT_TYPE(Name, Parent) 330#include "clang/AST/TypeNodes.def" 331 332 llvm::errs() << "Total bytes = " << TotalBytes << "\n"; 333 334 // Implicit special member functions. 335 llvm::errs() << NumImplicitDefaultConstructorsDeclared << "/" 336 << NumImplicitDefaultConstructors 337 << " implicit default constructors created\n"; 338 llvm::errs() << NumImplicitCopyConstructorsDeclared << "/" 339 << NumImplicitCopyConstructors 340 << " implicit copy constructors created\n"; 341 if (getLangOptions().CPlusPlus) 342 llvm::errs() << NumImplicitMoveConstructorsDeclared << "/" 343 << NumImplicitMoveConstructors 344 << " implicit move constructors created\n"; 345 llvm::errs() << NumImplicitCopyAssignmentOperatorsDeclared << "/" 346 << NumImplicitCopyAssignmentOperators 347 << " implicit copy assignment operators created\n"; 348 if (getLangOptions().CPlusPlus) 349 llvm::errs() << NumImplicitMoveAssignmentOperatorsDeclared << "/" 350 << NumImplicitMoveAssignmentOperators 351 << " implicit move assignment operators created\n"; 352 llvm::errs() << NumImplicitDestructorsDeclared << "/" 353 << NumImplicitDestructors 354 << " implicit destructors created\n"; 355 356 if (ExternalSource.get()) { 357 llvm::errs() << "\n"; 358 ExternalSource->PrintStats(); 359 } 360 361 BumpAlloc.PrintStats(); 362} 363 364TypedefDecl *ASTContext::getInt128Decl() const { 365 if (!Int128Decl) { 366 TypeSourceInfo *TInfo = getTrivialTypeSourceInfo(Int128Ty); 367 Int128Decl = TypedefDecl::Create(const_cast<ASTContext &>(*this), 368 getTranslationUnitDecl(), 369 SourceLocation(), 370 SourceLocation(), 371 &Idents.get("__int128_t"), 372 TInfo); 373 } 374 375 return Int128Decl; 376} 377 378TypedefDecl *ASTContext::getUInt128Decl() const { 379 if (!UInt128Decl) { 380 TypeSourceInfo *TInfo = getTrivialTypeSourceInfo(UnsignedInt128Ty); 381 UInt128Decl = TypedefDecl::Create(const_cast<ASTContext &>(*this), 382 getTranslationUnitDecl(), 383 SourceLocation(), 384 SourceLocation(), 385 &Idents.get("__uint128_t"), 386 TInfo); 387 } 388 389 return UInt128Decl; 390} 391 392void ASTContext::InitBuiltinType(CanQualType &R, BuiltinType::Kind K) { 393 BuiltinType *Ty = new (*this, TypeAlignment) BuiltinType(K); 394 R = CanQualType::CreateUnsafe(QualType(Ty, 0)); 395 Types.push_back(Ty); 396} 397 398void ASTContext::InitBuiltinTypes(const TargetInfo &Target) { 399 assert((!this->Target || this->Target == &Target) && 400 "Incorrect target reinitialization"); 401 assert(VoidTy.isNull() && "Context reinitialized?"); 402 403 this->Target = &Target; 404 405 ABI.reset(createCXXABI(Target)); 406 AddrSpaceMap = getAddressSpaceMap(Target, LangOpts); 407 408 // C99 6.2.5p19. 409 InitBuiltinType(VoidTy, BuiltinType::Void); 410 411 // C99 6.2.5p2. 412 InitBuiltinType(BoolTy, BuiltinType::Bool); 413 // C99 6.2.5p3. 414 if (LangOpts.CharIsSigned) 415 InitBuiltinType(CharTy, BuiltinType::Char_S); 416 else 417 InitBuiltinType(CharTy, BuiltinType::Char_U); 418 // C99 6.2.5p4. 419 InitBuiltinType(SignedCharTy, BuiltinType::SChar); 420 InitBuiltinType(ShortTy, BuiltinType::Short); 421 InitBuiltinType(IntTy, BuiltinType::Int); 422 InitBuiltinType(LongTy, BuiltinType::Long); 423 InitBuiltinType(LongLongTy, BuiltinType::LongLong); 424 425 // C99 6.2.5p6. 426 InitBuiltinType(UnsignedCharTy, BuiltinType::UChar); 427 InitBuiltinType(UnsignedShortTy, BuiltinType::UShort); 428 InitBuiltinType(UnsignedIntTy, BuiltinType::UInt); 429 InitBuiltinType(UnsignedLongTy, BuiltinType::ULong); 430 InitBuiltinType(UnsignedLongLongTy, BuiltinType::ULongLong); 431 432 // C99 6.2.5p10. 433 InitBuiltinType(FloatTy, BuiltinType::Float); 434 InitBuiltinType(DoubleTy, BuiltinType::Double); 435 InitBuiltinType(LongDoubleTy, BuiltinType::LongDouble); 436 437 // GNU extension, 128-bit integers. 438 InitBuiltinType(Int128Ty, BuiltinType::Int128); 439 InitBuiltinType(UnsignedInt128Ty, BuiltinType::UInt128); 440 441 if (LangOpts.CPlusPlus) { // C++ 3.9.1p5 442 if (TargetInfo::isTypeSigned(Target.getWCharType())) 443 InitBuiltinType(WCharTy, BuiltinType::WChar_S); 444 else // -fshort-wchar makes wchar_t be unsigned. 445 InitBuiltinType(WCharTy, BuiltinType::WChar_U); 446 } else // C99 447 WCharTy = getFromTargetType(Target.getWCharType()); 448 449 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 450 InitBuiltinType(Char16Ty, BuiltinType::Char16); 451 else // C99 452 Char16Ty = getFromTargetType(Target.getChar16Type()); 453 454 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 455 InitBuiltinType(Char32Ty, BuiltinType::Char32); 456 else // C99 457 Char32Ty = getFromTargetType(Target.getChar32Type()); 458 459 // Placeholder type for type-dependent expressions whose type is 460 // completely unknown. No code should ever check a type against 461 // DependentTy and users should never see it; however, it is here to 462 // help diagnose failures to properly check for type-dependent 463 // expressions. 464 InitBuiltinType(DependentTy, BuiltinType::Dependent); 465 466 // Placeholder type for functions. 467 InitBuiltinType(OverloadTy, BuiltinType::Overload); 468 469 // Placeholder type for bound members. 470 InitBuiltinType(BoundMemberTy, BuiltinType::BoundMember); 471 472 // Placeholder type for pseudo-objects. 473 InitBuiltinType(PseudoObjectTy, BuiltinType::PseudoObject); 474 475 // "any" type; useful for debugger-like clients. 476 InitBuiltinType(UnknownAnyTy, BuiltinType::UnknownAny); 477 478 // Placeholder type for unbridged ARC casts. 479 InitBuiltinType(ARCUnbridgedCastTy, BuiltinType::ARCUnbridgedCast); 480 481 // C99 6.2.5p11. 482 FloatComplexTy = getComplexType(FloatTy); 483 DoubleComplexTy = getComplexType(DoubleTy); 484 LongDoubleComplexTy = getComplexType(LongDoubleTy); 485 486 BuiltinVaListType = QualType(); 487 488 // Builtin types for 'id', 'Class', and 'SEL'. 489 InitBuiltinType(ObjCBuiltinIdTy, BuiltinType::ObjCId); 490 InitBuiltinType(ObjCBuiltinClassTy, BuiltinType::ObjCClass); 491 InitBuiltinType(ObjCBuiltinSelTy, BuiltinType::ObjCSel); 492 493 ObjCConstantStringType = QualType(); 494 495 // void * type 496 VoidPtrTy = getPointerType(VoidTy); 497 498 // nullptr type (C++0x 2.14.7) 499 InitBuiltinType(NullPtrTy, BuiltinType::NullPtr); 500 501 // half type (OpenCL 6.1.1.1) / ARM NEON __fp16 502 InitBuiltinType(HalfTy, BuiltinType::Half); 503} 504 505DiagnosticsEngine &ASTContext::getDiagnostics() const { 506 return SourceMgr.getDiagnostics(); 507} 508 509AttrVec& ASTContext::getDeclAttrs(const Decl *D) { 510 AttrVec *&Result = DeclAttrs[D]; 511 if (!Result) { 512 void *Mem = Allocate(sizeof(AttrVec)); 513 Result = new (Mem) AttrVec; 514 } 515 516 return *Result; 517} 518 519/// \brief Erase the attributes corresponding to the given declaration. 520void ASTContext::eraseDeclAttrs(const Decl *D) { 521 llvm::DenseMap<const Decl*, AttrVec*>::iterator Pos = DeclAttrs.find(D); 522 if (Pos != DeclAttrs.end()) { 523 Pos->second->~AttrVec(); 524 DeclAttrs.erase(Pos); 525 } 526} 527 528MemberSpecializationInfo * 529ASTContext::getInstantiatedFromStaticDataMember(const VarDecl *Var) { 530 assert(Var->isStaticDataMember() && "Not a static data member"); 531 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *>::iterator Pos 532 = InstantiatedFromStaticDataMember.find(Var); 533 if (Pos == InstantiatedFromStaticDataMember.end()) 534 return 0; 535 536 return Pos->second; 537} 538 539void 540ASTContext::setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 541 TemplateSpecializationKind TSK, 542 SourceLocation PointOfInstantiation) { 543 assert(Inst->isStaticDataMember() && "Not a static data member"); 544 assert(Tmpl->isStaticDataMember() && "Not a static data member"); 545 assert(!InstantiatedFromStaticDataMember[Inst] && 546 "Already noted what static data member was instantiated from"); 547 InstantiatedFromStaticDataMember[Inst] 548 = new (*this) MemberSpecializationInfo(Tmpl, TSK, PointOfInstantiation); 549} 550 551FunctionDecl *ASTContext::getClassScopeSpecializationPattern( 552 const FunctionDecl *FD){ 553 assert(FD && "Specialization is 0"); 554 llvm::DenseMap<const FunctionDecl*, FunctionDecl *>::const_iterator Pos 555 = ClassScopeSpecializationPattern.find(FD); 556 if (Pos == ClassScopeSpecializationPattern.end()) 557 return 0; 558 559 return Pos->second; 560} 561 562void ASTContext::setClassScopeSpecializationPattern(FunctionDecl *FD, 563 FunctionDecl *Pattern) { 564 assert(FD && "Specialization is 0"); 565 assert(Pattern && "Class scope specialization pattern is 0"); 566 ClassScopeSpecializationPattern[FD] = Pattern; 567} 568 569NamedDecl * 570ASTContext::getInstantiatedFromUsingDecl(UsingDecl *UUD) { 571 llvm::DenseMap<UsingDecl *, NamedDecl *>::const_iterator Pos 572 = InstantiatedFromUsingDecl.find(UUD); 573 if (Pos == InstantiatedFromUsingDecl.end()) 574 return 0; 575 576 return Pos->second; 577} 578 579void 580ASTContext::setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern) { 581 assert((isa<UsingDecl>(Pattern) || 582 isa<UnresolvedUsingValueDecl>(Pattern) || 583 isa<UnresolvedUsingTypenameDecl>(Pattern)) && 584 "pattern decl is not a using decl"); 585 assert(!InstantiatedFromUsingDecl[Inst] && "pattern already exists"); 586 InstantiatedFromUsingDecl[Inst] = Pattern; 587} 588 589UsingShadowDecl * 590ASTContext::getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst) { 591 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*>::const_iterator Pos 592 = InstantiatedFromUsingShadowDecl.find(Inst); 593 if (Pos == InstantiatedFromUsingShadowDecl.end()) 594 return 0; 595 596 return Pos->second; 597} 598 599void 600ASTContext::setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 601 UsingShadowDecl *Pattern) { 602 assert(!InstantiatedFromUsingShadowDecl[Inst] && "pattern already exists"); 603 InstantiatedFromUsingShadowDecl[Inst] = Pattern; 604} 605 606FieldDecl *ASTContext::getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field) { 607 llvm::DenseMap<FieldDecl *, FieldDecl *>::iterator Pos 608 = InstantiatedFromUnnamedFieldDecl.find(Field); 609 if (Pos == InstantiatedFromUnnamedFieldDecl.end()) 610 return 0; 611 612 return Pos->second; 613} 614 615void ASTContext::setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, 616 FieldDecl *Tmpl) { 617 assert(!Inst->getDeclName() && "Instantiated field decl is not unnamed"); 618 assert(!Tmpl->getDeclName() && "Template field decl is not unnamed"); 619 assert(!InstantiatedFromUnnamedFieldDecl[Inst] && 620 "Already noted what unnamed field was instantiated from"); 621 622 InstantiatedFromUnnamedFieldDecl[Inst] = Tmpl; 623} 624 625bool ASTContext::ZeroBitfieldFollowsNonBitfield(const FieldDecl *FD, 626 const FieldDecl *LastFD) const { 627 return (FD->isBitField() && LastFD && !LastFD->isBitField() && 628 FD->getBitWidthValue(*this) == 0); 629} 630 631bool ASTContext::ZeroBitfieldFollowsBitfield(const FieldDecl *FD, 632 const FieldDecl *LastFD) const { 633 return (FD->isBitField() && LastFD && LastFD->isBitField() && 634 FD->getBitWidthValue(*this) == 0 && 635 LastFD->getBitWidthValue(*this) != 0); 636} 637 638bool ASTContext::BitfieldFollowsBitfield(const FieldDecl *FD, 639 const FieldDecl *LastFD) const { 640 return (FD->isBitField() && LastFD && LastFD->isBitField() && 641 FD->getBitWidthValue(*this) && 642 LastFD->getBitWidthValue(*this)); 643} 644 645bool ASTContext::NonBitfieldFollowsBitfield(const FieldDecl *FD, 646 const FieldDecl *LastFD) const { 647 return (!FD->isBitField() && LastFD && LastFD->isBitField() && 648 LastFD->getBitWidthValue(*this)); 649} 650 651bool ASTContext::BitfieldFollowsNonBitfield(const FieldDecl *FD, 652 const FieldDecl *LastFD) const { 653 return (FD->isBitField() && LastFD && !LastFD->isBitField() && 654 FD->getBitWidthValue(*this)); 655} 656 657ASTContext::overridden_cxx_method_iterator 658ASTContext::overridden_methods_begin(const CXXMethodDecl *Method) const { 659 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 660 = OverriddenMethods.find(Method); 661 if (Pos == OverriddenMethods.end()) 662 return 0; 663 664 return Pos->second.begin(); 665} 666 667ASTContext::overridden_cxx_method_iterator 668ASTContext::overridden_methods_end(const CXXMethodDecl *Method) const { 669 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 670 = OverriddenMethods.find(Method); 671 if (Pos == OverriddenMethods.end()) 672 return 0; 673 674 return Pos->second.end(); 675} 676 677unsigned 678ASTContext::overridden_methods_size(const CXXMethodDecl *Method) const { 679 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 680 = OverriddenMethods.find(Method); 681 if (Pos == OverriddenMethods.end()) 682 return 0; 683 684 return Pos->second.size(); 685} 686 687void ASTContext::addOverriddenMethod(const CXXMethodDecl *Method, 688 const CXXMethodDecl *Overridden) { 689 OverriddenMethods[Method].push_back(Overridden); 690} 691 692void ASTContext::addedLocalImportDecl(ImportDecl *Import) { 693 assert(!Import->NextLocalImport && "Import declaration already in the chain"); 694 assert(!Import->isFromASTFile() && "Non-local import declaration"); 695 if (!FirstLocalImport) { 696 FirstLocalImport = Import; 697 LastLocalImport = Import; 698 return; 699 } 700 701 LastLocalImport->NextLocalImport = Import; 702 LastLocalImport = Import; 703} 704 705//===----------------------------------------------------------------------===// 706// Type Sizing and Analysis 707//===----------------------------------------------------------------------===// 708 709/// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 710/// scalar floating point type. 711const llvm::fltSemantics &ASTContext::getFloatTypeSemantics(QualType T) const { 712 const BuiltinType *BT = T->getAs<BuiltinType>(); 713 assert(BT && "Not a floating point type!"); 714 switch (BT->getKind()) { 715 default: llvm_unreachable("Not a floating point type!"); 716 case BuiltinType::Half: return Target->getHalfFormat(); 717 case BuiltinType::Float: return Target->getFloatFormat(); 718 case BuiltinType::Double: return Target->getDoubleFormat(); 719 case BuiltinType::LongDouble: return Target->getLongDoubleFormat(); 720 } 721} 722 723/// getDeclAlign - Return a conservative estimate of the alignment of the 724/// specified decl. Note that bitfields do not have a valid alignment, so 725/// this method will assert on them. 726/// If @p RefAsPointee, references are treated like their underlying type 727/// (for alignof), else they're treated like pointers (for CodeGen). 728CharUnits ASTContext::getDeclAlign(const Decl *D, bool RefAsPointee) const { 729 unsigned Align = Target->getCharWidth(); 730 731 bool UseAlignAttrOnly = false; 732 if (unsigned AlignFromAttr = D->getMaxAlignment()) { 733 Align = AlignFromAttr; 734 735 // __attribute__((aligned)) can increase or decrease alignment 736 // *except* on a struct or struct member, where it only increases 737 // alignment unless 'packed' is also specified. 738 // 739 // It is an error for alignas to decrease alignment, so we can 740 // ignore that possibility; Sema should diagnose it. 741 if (isa<FieldDecl>(D)) { 742 UseAlignAttrOnly = D->hasAttr<PackedAttr>() || 743 cast<FieldDecl>(D)->getParent()->hasAttr<PackedAttr>(); 744 } else { 745 UseAlignAttrOnly = true; 746 } 747 } 748 else if (isa<FieldDecl>(D)) 749 UseAlignAttrOnly = 750 D->hasAttr<PackedAttr>() || 751 cast<FieldDecl>(D)->getParent()->hasAttr<PackedAttr>(); 752 753 // If we're using the align attribute only, just ignore everything 754 // else about the declaration and its type. 755 if (UseAlignAttrOnly) { 756 // do nothing 757 758 } else if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) { 759 QualType T = VD->getType(); 760 if (const ReferenceType* RT = T->getAs<ReferenceType>()) { 761 if (RefAsPointee) 762 T = RT->getPointeeType(); 763 else 764 T = getPointerType(RT->getPointeeType()); 765 } 766 if (!T->isIncompleteType() && !T->isFunctionType()) { 767 // Adjust alignments of declarations with array type by the 768 // large-array alignment on the target. 769 unsigned MinWidth = Target->getLargeArrayMinWidth(); 770 const ArrayType *arrayType; 771 if (MinWidth && (arrayType = getAsArrayType(T))) { 772 if (isa<VariableArrayType>(arrayType)) 773 Align = std::max(Align, Target->getLargeArrayAlign()); 774 else if (isa<ConstantArrayType>(arrayType) && 775 MinWidth <= getTypeSize(cast<ConstantArrayType>(arrayType))) 776 Align = std::max(Align, Target->getLargeArrayAlign()); 777 778 // Walk through any array types while we're at it. 779 T = getBaseElementType(arrayType); 780 } 781 Align = std::max(Align, getPreferredTypeAlign(T.getTypePtr())); 782 } 783 784 // Fields can be subject to extra alignment constraints, like if 785 // the field is packed, the struct is packed, or the struct has a 786 // a max-field-alignment constraint (#pragma pack). So calculate 787 // the actual alignment of the field within the struct, and then 788 // (as we're expected to) constrain that by the alignment of the type. 789 if (const FieldDecl *field = dyn_cast<FieldDecl>(VD)) { 790 // So calculate the alignment of the field. 791 const ASTRecordLayout &layout = getASTRecordLayout(field->getParent()); 792 793 // Start with the record's overall alignment. 794 unsigned fieldAlign = toBits(layout.getAlignment()); 795 796 // Use the GCD of that and the offset within the record. 797 uint64_t offset = layout.getFieldOffset(field->getFieldIndex()); 798 if (offset > 0) { 799 // Alignment is always a power of 2, so the GCD will be a power of 2, 800 // which means we get to do this crazy thing instead of Euclid's. 801 uint64_t lowBitOfOffset = offset & (~offset + 1); 802 if (lowBitOfOffset < fieldAlign) 803 fieldAlign = static_cast<unsigned>(lowBitOfOffset); 804 } 805 806 Align = std::min(Align, fieldAlign); 807 } 808 } 809 810 return toCharUnitsFromBits(Align); 811} 812 813std::pair<CharUnits, CharUnits> 814ASTContext::getTypeInfoInChars(const Type *T) const { 815 std::pair<uint64_t, unsigned> Info = getTypeInfo(T); 816 return std::make_pair(toCharUnitsFromBits(Info.first), 817 toCharUnitsFromBits(Info.second)); 818} 819 820std::pair<CharUnits, CharUnits> 821ASTContext::getTypeInfoInChars(QualType T) const { 822 return getTypeInfoInChars(T.getTypePtr()); 823} 824 825/// getTypeSize - Return the size of the specified type, in bits. This method 826/// does not work on incomplete types. 827/// 828/// FIXME: Pointers into different addr spaces could have different sizes and 829/// alignment requirements: getPointerInfo should take an AddrSpace, this 830/// should take a QualType, &c. 831std::pair<uint64_t, unsigned> 832ASTContext::getTypeInfo(const Type *T) const { 833 uint64_t Width=0; 834 unsigned Align=8; 835 switch (T->getTypeClass()) { 836#define TYPE(Class, Base) 837#define ABSTRACT_TYPE(Class, Base) 838#define NON_CANONICAL_TYPE(Class, Base) 839#define DEPENDENT_TYPE(Class, Base) case Type::Class: 840#include "clang/AST/TypeNodes.def" 841 llvm_unreachable("Should not see dependent types"); 842 843 case Type::FunctionNoProto: 844 case Type::FunctionProto: 845 // GCC extension: alignof(function) = 32 bits 846 Width = 0; 847 Align = 32; 848 break; 849 850 case Type::IncompleteArray: 851 case Type::VariableArray: 852 Width = 0; 853 Align = getTypeAlign(cast<ArrayType>(T)->getElementType()); 854 break; 855 856 case Type::ConstantArray: { 857 const ConstantArrayType *CAT = cast<ConstantArrayType>(T); 858 859 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(CAT->getElementType()); 860 uint64_t Size = CAT->getSize().getZExtValue(); 861 assert((Size == 0 || EltInfo.first <= (uint64_t)(-1)/Size) && "Overflow in array type bit size evaluation"); 862 Width = EltInfo.first*Size; 863 Align = EltInfo.second; 864 Width = llvm::RoundUpToAlignment(Width, Align); 865 break; 866 } 867 case Type::ExtVector: 868 case Type::Vector: { 869 const VectorType *VT = cast<VectorType>(T); 870 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(VT->getElementType()); 871 Width = EltInfo.first*VT->getNumElements(); 872 Align = Width; 873 // If the alignment is not a power of 2, round up to the next power of 2. 874 // This happens for non-power-of-2 length vectors. 875 if (Align & (Align-1)) { 876 Align = llvm::NextPowerOf2(Align); 877 Width = llvm::RoundUpToAlignment(Width, Align); 878 } 879 break; 880 } 881 882 case Type::Builtin: 883 switch (cast<BuiltinType>(T)->getKind()) { 884 default: llvm_unreachable("Unknown builtin type!"); 885 case BuiltinType::Void: 886 // GCC extension: alignof(void) = 8 bits. 887 Width = 0; 888 Align = 8; 889 break; 890 891 case BuiltinType::Bool: 892 Width = Target->getBoolWidth(); 893 Align = Target->getBoolAlign(); 894 break; 895 case BuiltinType::Char_S: 896 case BuiltinType::Char_U: 897 case BuiltinType::UChar: 898 case BuiltinType::SChar: 899 Width = Target->getCharWidth(); 900 Align = Target->getCharAlign(); 901 break; 902 case BuiltinType::WChar_S: 903 case BuiltinType::WChar_U: 904 Width = Target->getWCharWidth(); 905 Align = Target->getWCharAlign(); 906 break; 907 case BuiltinType::Char16: 908 Width = Target->getChar16Width(); 909 Align = Target->getChar16Align(); 910 break; 911 case BuiltinType::Char32: 912 Width = Target->getChar32Width(); 913 Align = Target->getChar32Align(); 914 break; 915 case BuiltinType::UShort: 916 case BuiltinType::Short: 917 Width = Target->getShortWidth(); 918 Align = Target->getShortAlign(); 919 break; 920 case BuiltinType::UInt: 921 case BuiltinType::Int: 922 Width = Target->getIntWidth(); 923 Align = Target->getIntAlign(); 924 break; 925 case BuiltinType::ULong: 926 case BuiltinType::Long: 927 Width = Target->getLongWidth(); 928 Align = Target->getLongAlign(); 929 break; 930 case BuiltinType::ULongLong: 931 case BuiltinType::LongLong: 932 Width = Target->getLongLongWidth(); 933 Align = Target->getLongLongAlign(); 934 break; 935 case BuiltinType::Int128: 936 case BuiltinType::UInt128: 937 Width = 128; 938 Align = 128; // int128_t is 128-bit aligned on all targets. 939 break; 940 case BuiltinType::Half: 941 Width = Target->getHalfWidth(); 942 Align = Target->getHalfAlign(); 943 break; 944 case BuiltinType::Float: 945 Width = Target->getFloatWidth(); 946 Align = Target->getFloatAlign(); 947 break; 948 case BuiltinType::Double: 949 Width = Target->getDoubleWidth(); 950 Align = Target->getDoubleAlign(); 951 break; 952 case BuiltinType::LongDouble: 953 Width = Target->getLongDoubleWidth(); 954 Align = Target->getLongDoubleAlign(); 955 break; 956 case BuiltinType::NullPtr: 957 Width = Target->getPointerWidth(0); // C++ 3.9.1p11: sizeof(nullptr_t) 958 Align = Target->getPointerAlign(0); // == sizeof(void*) 959 break; 960 case BuiltinType::ObjCId: 961 case BuiltinType::ObjCClass: 962 case BuiltinType::ObjCSel: 963 Width = Target->getPointerWidth(0); 964 Align = Target->getPointerAlign(0); 965 break; 966 } 967 break; 968 case Type::ObjCObjectPointer: 969 Width = Target->getPointerWidth(0); 970 Align = Target->getPointerAlign(0); 971 break; 972 case Type::BlockPointer: { 973 unsigned AS = getTargetAddressSpace( 974 cast<BlockPointerType>(T)->getPointeeType()); 975 Width = Target->getPointerWidth(AS); 976 Align = Target->getPointerAlign(AS); 977 break; 978 } 979 case Type::LValueReference: 980 case Type::RValueReference: { 981 // alignof and sizeof should never enter this code path here, so we go 982 // the pointer route. 983 unsigned AS = getTargetAddressSpace( 984 cast<ReferenceType>(T)->getPointeeType()); 985 Width = Target->getPointerWidth(AS); 986 Align = Target->getPointerAlign(AS); 987 break; 988 } 989 case Type::Pointer: { 990 unsigned AS = getTargetAddressSpace(cast<PointerType>(T)->getPointeeType()); 991 Width = Target->getPointerWidth(AS); 992 Align = Target->getPointerAlign(AS); 993 break; 994 } 995 case Type::MemberPointer: { 996 const MemberPointerType *MPT = cast<MemberPointerType>(T); 997 std::pair<uint64_t, unsigned> PtrDiffInfo = 998 getTypeInfo(getPointerDiffType()); 999 Width = PtrDiffInfo.first * ABI->getMemberPointerSize(MPT); 1000 Align = PtrDiffInfo.second; 1001 break; 1002 } 1003 case Type::Complex: { 1004 // Complex types have the same alignment as their elements, but twice the 1005 // size. 1006 std::pair<uint64_t, unsigned> EltInfo = 1007 getTypeInfo(cast<ComplexType>(T)->getElementType()); 1008 Width = EltInfo.first*2; 1009 Align = EltInfo.second; 1010 break; 1011 } 1012 case Type::ObjCObject: 1013 return getTypeInfo(cast<ObjCObjectType>(T)->getBaseType().getTypePtr()); 1014 case Type::ObjCInterface: { 1015 const ObjCInterfaceType *ObjCI = cast<ObjCInterfaceType>(T); 1016 const ASTRecordLayout &Layout = getASTObjCInterfaceLayout(ObjCI->getDecl()); 1017 Width = toBits(Layout.getSize()); 1018 Align = toBits(Layout.getAlignment()); 1019 break; 1020 } 1021 case Type::Record: 1022 case Type::Enum: { 1023 const TagType *TT = cast<TagType>(T); 1024 1025 if (TT->getDecl()->isInvalidDecl()) { 1026 Width = 8; 1027 Align = 8; 1028 break; 1029 } 1030 1031 if (const EnumType *ET = dyn_cast<EnumType>(TT)) 1032 return getTypeInfo(ET->getDecl()->getIntegerType()); 1033 1034 const RecordType *RT = cast<RecordType>(TT); 1035 const ASTRecordLayout &Layout = getASTRecordLayout(RT->getDecl()); 1036 Width = toBits(Layout.getSize()); 1037 Align = toBits(Layout.getAlignment()); 1038 break; 1039 } 1040 1041 case Type::SubstTemplateTypeParm: 1042 return getTypeInfo(cast<SubstTemplateTypeParmType>(T)-> 1043 getReplacementType().getTypePtr()); 1044 1045 case Type::Auto: { 1046 const AutoType *A = cast<AutoType>(T); 1047 assert(A->isDeduced() && "Cannot request the size of a dependent type"); 1048 return getTypeInfo(A->getDeducedType().getTypePtr()); 1049 } 1050 1051 case Type::Paren: 1052 return getTypeInfo(cast<ParenType>(T)->getInnerType().getTypePtr()); 1053 1054 case Type::Typedef: { 1055 const TypedefNameDecl *Typedef = cast<TypedefType>(T)->getDecl(); 1056 std::pair<uint64_t, unsigned> Info 1057 = getTypeInfo(Typedef->getUnderlyingType().getTypePtr()); 1058 // If the typedef has an aligned attribute on it, it overrides any computed 1059 // alignment we have. This violates the GCC documentation (which says that 1060 // attribute(aligned) can only round up) but matches its implementation. 1061 if (unsigned AttrAlign = Typedef->getMaxAlignment()) 1062 Align = AttrAlign; 1063 else 1064 Align = Info.second; 1065 Width = Info.first; 1066 break; 1067 } 1068 1069 case Type::TypeOfExpr: 1070 return getTypeInfo(cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType() 1071 .getTypePtr()); 1072 1073 case Type::TypeOf: 1074 return getTypeInfo(cast<TypeOfType>(T)->getUnderlyingType().getTypePtr()); 1075 1076 case Type::Decltype: 1077 return getTypeInfo(cast<DecltypeType>(T)->getUnderlyingExpr()->getType() 1078 .getTypePtr()); 1079 1080 case Type::UnaryTransform: 1081 return getTypeInfo(cast<UnaryTransformType>(T)->getUnderlyingType()); 1082 1083 case Type::Elaborated: 1084 return getTypeInfo(cast<ElaboratedType>(T)->getNamedType().getTypePtr()); 1085 1086 case Type::Attributed: 1087 return getTypeInfo( 1088 cast<AttributedType>(T)->getEquivalentType().getTypePtr()); 1089 1090 case Type::TemplateSpecialization: { 1091 assert(getCanonicalType(T) != T && 1092 "Cannot request the size of a dependent type"); 1093 const TemplateSpecializationType *TST = cast<TemplateSpecializationType>(T); 1094 // A type alias template specialization may refer to a typedef with the 1095 // aligned attribute on it. 1096 if (TST->isTypeAlias()) 1097 return getTypeInfo(TST->getAliasedType().getTypePtr()); 1098 else 1099 return getTypeInfo(getCanonicalType(T)); 1100 } 1101 1102 case Type::Atomic: { 1103 std::pair<uint64_t, unsigned> Info 1104 = getTypeInfo(cast<AtomicType>(T)->getValueType()); 1105 Width = Info.first; 1106 Align = Info.second; 1107 if (Width != 0 && Width <= Target->getMaxAtomicPromoteWidth() && 1108 llvm::isPowerOf2_64(Width)) { 1109 // We can potentially perform lock-free atomic operations for this 1110 // type; promote the alignment appropriately. 1111 // FIXME: We could potentially promote the width here as well... 1112 // is that worthwhile? (Non-struct atomic types generally have 1113 // power-of-two size anyway, but structs might not. Requires a bit 1114 // of implementation work to make sure we zero out the extra bits.) 1115 Align = static_cast<unsigned>(Width); 1116 } 1117 } 1118 1119 } 1120 1121 assert(llvm::isPowerOf2_32(Align) && "Alignment must be power of 2"); 1122 return std::make_pair(Width, Align); 1123} 1124 1125/// toCharUnitsFromBits - Convert a size in bits to a size in characters. 1126CharUnits ASTContext::toCharUnitsFromBits(int64_t BitSize) const { 1127 return CharUnits::fromQuantity(BitSize / getCharWidth()); 1128} 1129 1130/// toBits - Convert a size in characters to a size in characters. 1131int64_t ASTContext::toBits(CharUnits CharSize) const { 1132 return CharSize.getQuantity() * getCharWidth(); 1133} 1134 1135/// getTypeSizeInChars - Return the size of the specified type, in characters. 1136/// This method does not work on incomplete types. 1137CharUnits ASTContext::getTypeSizeInChars(QualType T) const { 1138 return toCharUnitsFromBits(getTypeSize(T)); 1139} 1140CharUnits ASTContext::getTypeSizeInChars(const Type *T) const { 1141 return toCharUnitsFromBits(getTypeSize(T)); 1142} 1143 1144/// getTypeAlignInChars - Return the ABI-specified alignment of a type, in 1145/// characters. This method does not work on incomplete types. 1146CharUnits ASTContext::getTypeAlignInChars(QualType T) const { 1147 return toCharUnitsFromBits(getTypeAlign(T)); 1148} 1149CharUnits ASTContext::getTypeAlignInChars(const Type *T) const { 1150 return toCharUnitsFromBits(getTypeAlign(T)); 1151} 1152 1153/// getPreferredTypeAlign - Return the "preferred" alignment of the specified 1154/// type for the current target in bits. This can be different than the ABI 1155/// alignment in cases where it is beneficial for performance to overalign 1156/// a data type. 1157unsigned ASTContext::getPreferredTypeAlign(const Type *T) const { 1158 unsigned ABIAlign = getTypeAlign(T); 1159 1160 // Double and long long should be naturally aligned if possible. 1161 if (const ComplexType* CT = T->getAs<ComplexType>()) 1162 T = CT->getElementType().getTypePtr(); 1163 if (T->isSpecificBuiltinType(BuiltinType::Double) || 1164 T->isSpecificBuiltinType(BuiltinType::LongLong)) 1165 return std::max(ABIAlign, (unsigned)getTypeSize(T)); 1166 1167 return ABIAlign; 1168} 1169 1170/// DeepCollectObjCIvars - 1171/// This routine first collects all declared, but not synthesized, ivars in 1172/// super class and then collects all ivars, including those synthesized for 1173/// current class. This routine is used for implementation of current class 1174/// when all ivars, declared and synthesized are known. 1175/// 1176void ASTContext::DeepCollectObjCIvars(const ObjCInterfaceDecl *OI, 1177 bool leafClass, 1178 SmallVectorImpl<const ObjCIvarDecl*> &Ivars) const { 1179 if (const ObjCInterfaceDecl *SuperClass = OI->getSuperClass()) 1180 DeepCollectObjCIvars(SuperClass, false, Ivars); 1181 if (!leafClass) { 1182 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 1183 E = OI->ivar_end(); I != E; ++I) 1184 Ivars.push_back(*I); 1185 } else { 1186 ObjCInterfaceDecl *IDecl = const_cast<ObjCInterfaceDecl *>(OI); 1187 for (const ObjCIvarDecl *Iv = IDecl->all_declared_ivar_begin(); Iv; 1188 Iv= Iv->getNextIvar()) 1189 Ivars.push_back(Iv); 1190 } 1191} 1192 1193/// CollectInheritedProtocols - Collect all protocols in current class and 1194/// those inherited by it. 1195void ASTContext::CollectInheritedProtocols(const Decl *CDecl, 1196 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols) { 1197 if (const ObjCInterfaceDecl *OI = dyn_cast<ObjCInterfaceDecl>(CDecl)) { 1198 // We can use protocol_iterator here instead of 1199 // all_referenced_protocol_iterator since we are walking all categories. 1200 for (ObjCInterfaceDecl::all_protocol_iterator P = OI->all_referenced_protocol_begin(), 1201 PE = OI->all_referenced_protocol_end(); P != PE; ++P) { 1202 ObjCProtocolDecl *Proto = (*P); 1203 Protocols.insert(Proto->getCanonicalDecl()); 1204 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1205 PE = Proto->protocol_end(); P != PE; ++P) { 1206 Protocols.insert((*P)->getCanonicalDecl()); 1207 CollectInheritedProtocols(*P, Protocols); 1208 } 1209 } 1210 1211 // Categories of this Interface. 1212 for (const ObjCCategoryDecl *CDeclChain = OI->getCategoryList(); 1213 CDeclChain; CDeclChain = CDeclChain->getNextClassCategory()) 1214 CollectInheritedProtocols(CDeclChain, Protocols); 1215 if (ObjCInterfaceDecl *SD = OI->getSuperClass()) 1216 while (SD) { 1217 CollectInheritedProtocols(SD, Protocols); 1218 SD = SD->getSuperClass(); 1219 } 1220 } else if (const ObjCCategoryDecl *OC = dyn_cast<ObjCCategoryDecl>(CDecl)) { 1221 for (ObjCCategoryDecl::protocol_iterator P = OC->protocol_begin(), 1222 PE = OC->protocol_end(); P != PE; ++P) { 1223 ObjCProtocolDecl *Proto = (*P); 1224 Protocols.insert(Proto->getCanonicalDecl()); 1225 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1226 PE = Proto->protocol_end(); P != PE; ++P) 1227 CollectInheritedProtocols(*P, Protocols); 1228 } 1229 } else if (const ObjCProtocolDecl *OP = dyn_cast<ObjCProtocolDecl>(CDecl)) { 1230 for (ObjCProtocolDecl::protocol_iterator P = OP->protocol_begin(), 1231 PE = OP->protocol_end(); P != PE; ++P) { 1232 ObjCProtocolDecl *Proto = (*P); 1233 Protocols.insert(Proto->getCanonicalDecl()); 1234 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1235 PE = Proto->protocol_end(); P != PE; ++P) 1236 CollectInheritedProtocols(*P, Protocols); 1237 } 1238 } 1239} 1240 1241unsigned ASTContext::CountNonClassIvars(const ObjCInterfaceDecl *OI) const { 1242 unsigned count = 0; 1243 // Count ivars declared in class extension. 1244 for (const ObjCCategoryDecl *CDecl = OI->getFirstClassExtension(); CDecl; 1245 CDecl = CDecl->getNextClassExtension()) 1246 count += CDecl->ivar_size(); 1247 1248 // Count ivar defined in this class's implementation. This 1249 // includes synthesized ivars. 1250 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) 1251 count += ImplDecl->ivar_size(); 1252 1253 return count; 1254} 1255 1256bool ASTContext::isSentinelNullExpr(const Expr *E) { 1257 if (!E) 1258 return false; 1259 1260 // nullptr_t is always treated as null. 1261 if (E->getType()->isNullPtrType()) return true; 1262 1263 if (E->getType()->isAnyPointerType() && 1264 E->IgnoreParenCasts()->isNullPointerConstant(*this, 1265 Expr::NPC_ValueDependentIsNull)) 1266 return true; 1267 1268 // Unfortunately, __null has type 'int'. 1269 if (isa<GNUNullExpr>(E)) return true; 1270 1271 return false; 1272} 1273 1274/// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 1275ObjCImplementationDecl *ASTContext::getObjCImplementation(ObjCInterfaceDecl *D) { 1276 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 1277 I = ObjCImpls.find(D); 1278 if (I != ObjCImpls.end()) 1279 return cast<ObjCImplementationDecl>(I->second); 1280 return 0; 1281} 1282/// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 1283ObjCCategoryImplDecl *ASTContext::getObjCImplementation(ObjCCategoryDecl *D) { 1284 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 1285 I = ObjCImpls.find(D); 1286 if (I != ObjCImpls.end()) 1287 return cast<ObjCCategoryImplDecl>(I->second); 1288 return 0; 1289} 1290 1291/// \brief Set the implementation of ObjCInterfaceDecl. 1292void ASTContext::setObjCImplementation(ObjCInterfaceDecl *IFaceD, 1293 ObjCImplementationDecl *ImplD) { 1294 assert(IFaceD && ImplD && "Passed null params"); 1295 ObjCImpls[IFaceD] = ImplD; 1296} 1297/// \brief Set the implementation of ObjCCategoryDecl. 1298void ASTContext::setObjCImplementation(ObjCCategoryDecl *CatD, 1299 ObjCCategoryImplDecl *ImplD) { 1300 assert(CatD && ImplD && "Passed null params"); 1301 ObjCImpls[CatD] = ImplD; 1302} 1303 1304ObjCInterfaceDecl *ASTContext::getObjContainingInterface(NamedDecl *ND) const { 1305 if (ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(ND->getDeclContext())) 1306 return ID; 1307 if (ObjCCategoryDecl *CD = dyn_cast<ObjCCategoryDecl>(ND->getDeclContext())) 1308 return CD->getClassInterface(); 1309 if (ObjCImplDecl *IMD = dyn_cast<ObjCImplDecl>(ND->getDeclContext())) 1310 return IMD->getClassInterface(); 1311 1312 return 0; 1313} 1314 1315/// \brief Get the copy initialization expression of VarDecl,or NULL if 1316/// none exists. 1317Expr *ASTContext::getBlockVarCopyInits(const VarDecl*VD) { 1318 assert(VD && "Passed null params"); 1319 assert(VD->hasAttr<BlocksAttr>() && 1320 "getBlockVarCopyInits - not __block var"); 1321 llvm::DenseMap<const VarDecl*, Expr*>::iterator 1322 I = BlockVarCopyInits.find(VD); 1323 return (I != BlockVarCopyInits.end()) ? cast<Expr>(I->second) : 0; 1324} 1325 1326/// \brief Set the copy inialization expression of a block var decl. 1327void ASTContext::setBlockVarCopyInits(VarDecl*VD, Expr* Init) { 1328 assert(VD && Init && "Passed null params"); 1329 assert(VD->hasAttr<BlocksAttr>() && 1330 "setBlockVarCopyInits - not __block var"); 1331 BlockVarCopyInits[VD] = Init; 1332} 1333 1334/// \brief Allocate an uninitialized TypeSourceInfo. 1335/// 1336/// The caller should initialize the memory held by TypeSourceInfo using 1337/// the TypeLoc wrappers. 1338/// 1339/// \param T the type that will be the basis for type source info. This type 1340/// should refer to how the declarator was written in source code, not to 1341/// what type semantic analysis resolved the declarator to. 1342TypeSourceInfo *ASTContext::CreateTypeSourceInfo(QualType T, 1343 unsigned DataSize) const { 1344 if (!DataSize) 1345 DataSize = TypeLoc::getFullDataSizeForType(T); 1346 else 1347 assert(DataSize == TypeLoc::getFullDataSizeForType(T) && 1348 "incorrect data size provided to CreateTypeSourceInfo!"); 1349 1350 TypeSourceInfo *TInfo = 1351 (TypeSourceInfo*)BumpAlloc.Allocate(sizeof(TypeSourceInfo) + DataSize, 8); 1352 new (TInfo) TypeSourceInfo(T); 1353 return TInfo; 1354} 1355 1356TypeSourceInfo *ASTContext::getTrivialTypeSourceInfo(QualType T, 1357 SourceLocation L) const { 1358 TypeSourceInfo *DI = CreateTypeSourceInfo(T); 1359 DI->getTypeLoc().initialize(const_cast<ASTContext &>(*this), L); 1360 return DI; 1361} 1362 1363const ASTRecordLayout & 1364ASTContext::getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) const { 1365 return getObjCLayout(D, 0); 1366} 1367 1368const ASTRecordLayout & 1369ASTContext::getASTObjCImplementationLayout( 1370 const ObjCImplementationDecl *D) const { 1371 return getObjCLayout(D->getClassInterface(), D); 1372} 1373 1374//===----------------------------------------------------------------------===// 1375// Type creation/memoization methods 1376//===----------------------------------------------------------------------===// 1377 1378QualType 1379ASTContext::getExtQualType(const Type *baseType, Qualifiers quals) const { 1380 unsigned fastQuals = quals.getFastQualifiers(); 1381 quals.removeFastQualifiers(); 1382 1383 // Check if we've already instantiated this type. 1384 llvm::FoldingSetNodeID ID; 1385 ExtQuals::Profile(ID, baseType, quals); 1386 void *insertPos = 0; 1387 if (ExtQuals *eq = ExtQualNodes.FindNodeOrInsertPos(ID, insertPos)) { 1388 assert(eq->getQualifiers() == quals); 1389 return QualType(eq, fastQuals); 1390 } 1391 1392 // If the base type is not canonical, make the appropriate canonical type. 1393 QualType canon; 1394 if (!baseType->isCanonicalUnqualified()) { 1395 SplitQualType canonSplit = baseType->getCanonicalTypeInternal().split(); 1396 canonSplit.second.addConsistentQualifiers(quals); 1397 canon = getExtQualType(canonSplit.first, canonSplit.second); 1398 1399 // Re-find the insert position. 1400 (void) ExtQualNodes.FindNodeOrInsertPos(ID, insertPos); 1401 } 1402 1403 ExtQuals *eq = new (*this, TypeAlignment) ExtQuals(baseType, canon, quals); 1404 ExtQualNodes.InsertNode(eq, insertPos); 1405 return QualType(eq, fastQuals); 1406} 1407 1408QualType 1409ASTContext::getAddrSpaceQualType(QualType T, unsigned AddressSpace) const { 1410 QualType CanT = getCanonicalType(T); 1411 if (CanT.getAddressSpace() == AddressSpace) 1412 return T; 1413 1414 // If we are composing extended qualifiers together, merge together 1415 // into one ExtQuals node. 1416 QualifierCollector Quals; 1417 const Type *TypeNode = Quals.strip(T); 1418 1419 // If this type already has an address space specified, it cannot get 1420 // another one. 1421 assert(!Quals.hasAddressSpace() && 1422 "Type cannot be in multiple addr spaces!"); 1423 Quals.addAddressSpace(AddressSpace); 1424 1425 return getExtQualType(TypeNode, Quals); 1426} 1427 1428QualType ASTContext::getObjCGCQualType(QualType T, 1429 Qualifiers::GC GCAttr) const { 1430 QualType CanT = getCanonicalType(T); 1431 if (CanT.getObjCGCAttr() == GCAttr) 1432 return T; 1433 1434 if (const PointerType *ptr = T->getAs<PointerType>()) { 1435 QualType Pointee = ptr->getPointeeType(); 1436 if (Pointee->isAnyPointerType()) { 1437 QualType ResultType = getObjCGCQualType(Pointee, GCAttr); 1438 return getPointerType(ResultType); 1439 } 1440 } 1441 1442 // If we are composing extended qualifiers together, merge together 1443 // into one ExtQuals node. 1444 QualifierCollector Quals; 1445 const Type *TypeNode = Quals.strip(T); 1446 1447 // If this type already has an ObjCGC specified, it cannot get 1448 // another one. 1449 assert(!Quals.hasObjCGCAttr() && 1450 "Type cannot have multiple ObjCGCs!"); 1451 Quals.addObjCGCAttr(GCAttr); 1452 1453 return getExtQualType(TypeNode, Quals); 1454} 1455 1456const FunctionType *ASTContext::adjustFunctionType(const FunctionType *T, 1457 FunctionType::ExtInfo Info) { 1458 if (T->getExtInfo() == Info) 1459 return T; 1460 1461 QualType Result; 1462 if (const FunctionNoProtoType *FNPT = dyn_cast<FunctionNoProtoType>(T)) { 1463 Result = getFunctionNoProtoType(FNPT->getResultType(), Info); 1464 } else { 1465 const FunctionProtoType *FPT = cast<FunctionProtoType>(T); 1466 FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); 1467 EPI.ExtInfo = Info; 1468 Result = getFunctionType(FPT->getResultType(), FPT->arg_type_begin(), 1469 FPT->getNumArgs(), EPI); 1470 } 1471 1472 return cast<FunctionType>(Result.getTypePtr()); 1473} 1474 1475/// getComplexType - Return the uniqued reference to the type for a complex 1476/// number with the specified element type. 1477QualType ASTContext::getComplexType(QualType T) const { 1478 // Unique pointers, to guarantee there is only one pointer of a particular 1479 // structure. 1480 llvm::FoldingSetNodeID ID; 1481 ComplexType::Profile(ID, T); 1482 1483 void *InsertPos = 0; 1484 if (ComplexType *CT = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos)) 1485 return QualType(CT, 0); 1486 1487 // If the pointee type isn't canonical, this won't be a canonical type either, 1488 // so fill in the canonical type field. 1489 QualType Canonical; 1490 if (!T.isCanonical()) { 1491 Canonical = getComplexType(getCanonicalType(T)); 1492 1493 // Get the new insert position for the node we care about. 1494 ComplexType *NewIP = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos); 1495 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1496 } 1497 ComplexType *New = new (*this, TypeAlignment) ComplexType(T, Canonical); 1498 Types.push_back(New); 1499 ComplexTypes.InsertNode(New, InsertPos); 1500 return QualType(New, 0); 1501} 1502 1503/// getPointerType - Return the uniqued reference to the type for a pointer to 1504/// the specified type. 1505QualType ASTContext::getPointerType(QualType T) const { 1506 // Unique pointers, to guarantee there is only one pointer of a particular 1507 // structure. 1508 llvm::FoldingSetNodeID ID; 1509 PointerType::Profile(ID, T); 1510 1511 void *InsertPos = 0; 1512 if (PointerType *PT = PointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1513 return QualType(PT, 0); 1514 1515 // If the pointee type isn't canonical, this won't be a canonical type either, 1516 // so fill in the canonical type field. 1517 QualType Canonical; 1518 if (!T.isCanonical()) { 1519 Canonical = getPointerType(getCanonicalType(T)); 1520 1521 // Get the new insert position for the node we care about. 1522 PointerType *NewIP = PointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1523 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1524 } 1525 PointerType *New = new (*this, TypeAlignment) PointerType(T, Canonical); 1526 Types.push_back(New); 1527 PointerTypes.InsertNode(New, InsertPos); 1528 return QualType(New, 0); 1529} 1530 1531/// getBlockPointerType - Return the uniqued reference to the type for 1532/// a pointer to the specified block. 1533QualType ASTContext::getBlockPointerType(QualType T) const { 1534 assert(T->isFunctionType() && "block of function types only"); 1535 // Unique pointers, to guarantee there is only one block of a particular 1536 // structure. 1537 llvm::FoldingSetNodeID ID; 1538 BlockPointerType::Profile(ID, T); 1539 1540 void *InsertPos = 0; 1541 if (BlockPointerType *PT = 1542 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1543 return QualType(PT, 0); 1544 1545 // If the block pointee type isn't canonical, this won't be a canonical 1546 // type either so fill in the canonical type field. 1547 QualType Canonical; 1548 if (!T.isCanonical()) { 1549 Canonical = getBlockPointerType(getCanonicalType(T)); 1550 1551 // Get the new insert position for the node we care about. 1552 BlockPointerType *NewIP = 1553 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1554 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1555 } 1556 BlockPointerType *New 1557 = new (*this, TypeAlignment) BlockPointerType(T, Canonical); 1558 Types.push_back(New); 1559 BlockPointerTypes.InsertNode(New, InsertPos); 1560 return QualType(New, 0); 1561} 1562 1563/// getLValueReferenceType - Return the uniqued reference to the type for an 1564/// lvalue reference to the specified type. 1565QualType 1566ASTContext::getLValueReferenceType(QualType T, bool SpelledAsLValue) const { 1567 assert(getCanonicalType(T) != OverloadTy && 1568 "Unresolved overloaded function type"); 1569 1570 // Unique pointers, to guarantee there is only one pointer of a particular 1571 // structure. 1572 llvm::FoldingSetNodeID ID; 1573 ReferenceType::Profile(ID, T, SpelledAsLValue); 1574 1575 void *InsertPos = 0; 1576 if (LValueReferenceType *RT = 1577 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1578 return QualType(RT, 0); 1579 1580 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1581 1582 // If the referencee type isn't canonical, this won't be a canonical type 1583 // either, so fill in the canonical type field. 1584 QualType Canonical; 1585 if (!SpelledAsLValue || InnerRef || !T.isCanonical()) { 1586 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1587 Canonical = getLValueReferenceType(getCanonicalType(PointeeType)); 1588 1589 // Get the new insert position for the node we care about. 1590 LValueReferenceType *NewIP = 1591 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1592 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1593 } 1594 1595 LValueReferenceType *New 1596 = new (*this, TypeAlignment) LValueReferenceType(T, Canonical, 1597 SpelledAsLValue); 1598 Types.push_back(New); 1599 LValueReferenceTypes.InsertNode(New, InsertPos); 1600 1601 return QualType(New, 0); 1602} 1603 1604/// getRValueReferenceType - Return the uniqued reference to the type for an 1605/// rvalue reference to the specified type. 1606QualType ASTContext::getRValueReferenceType(QualType T) const { 1607 // Unique pointers, to guarantee there is only one pointer of a particular 1608 // structure. 1609 llvm::FoldingSetNodeID ID; 1610 ReferenceType::Profile(ID, T, false); 1611 1612 void *InsertPos = 0; 1613 if (RValueReferenceType *RT = 1614 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1615 return QualType(RT, 0); 1616 1617 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1618 1619 // If the referencee type isn't canonical, this won't be a canonical type 1620 // either, so fill in the canonical type field. 1621 QualType Canonical; 1622 if (InnerRef || !T.isCanonical()) { 1623 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1624 Canonical = getRValueReferenceType(getCanonicalType(PointeeType)); 1625 1626 // Get the new insert position for the node we care about. 1627 RValueReferenceType *NewIP = 1628 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1629 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1630 } 1631 1632 RValueReferenceType *New 1633 = new (*this, TypeAlignment) RValueReferenceType(T, Canonical); 1634 Types.push_back(New); 1635 RValueReferenceTypes.InsertNode(New, InsertPos); 1636 return QualType(New, 0); 1637} 1638 1639/// getMemberPointerType - Return the uniqued reference to the type for a 1640/// member pointer to the specified type, in the specified class. 1641QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls) const { 1642 // Unique pointers, to guarantee there is only one pointer of a particular 1643 // structure. 1644 llvm::FoldingSetNodeID ID; 1645 MemberPointerType::Profile(ID, T, Cls); 1646 1647 void *InsertPos = 0; 1648 if (MemberPointerType *PT = 1649 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1650 return QualType(PT, 0); 1651 1652 // If the pointee or class type isn't canonical, this won't be a canonical 1653 // type either, so fill in the canonical type field. 1654 QualType Canonical; 1655 if (!T.isCanonical() || !Cls->isCanonicalUnqualified()) { 1656 Canonical = getMemberPointerType(getCanonicalType(T),getCanonicalType(Cls)); 1657 1658 // Get the new insert position for the node we care about. 1659 MemberPointerType *NewIP = 1660 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1661 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1662 } 1663 MemberPointerType *New 1664 = new (*this, TypeAlignment) MemberPointerType(T, Cls, Canonical); 1665 Types.push_back(New); 1666 MemberPointerTypes.InsertNode(New, InsertPos); 1667 return QualType(New, 0); 1668} 1669 1670/// getConstantArrayType - Return the unique reference to the type for an 1671/// array of the specified element type. 1672QualType ASTContext::getConstantArrayType(QualType EltTy, 1673 const llvm::APInt &ArySizeIn, 1674 ArrayType::ArraySizeModifier ASM, 1675 unsigned IndexTypeQuals) const { 1676 assert((EltTy->isDependentType() || 1677 EltTy->isIncompleteType() || EltTy->isConstantSizeType()) && 1678 "Constant array of VLAs is illegal!"); 1679 1680 // Convert the array size into a canonical width matching the pointer size for 1681 // the target. 1682 llvm::APInt ArySize(ArySizeIn); 1683 ArySize = 1684 ArySize.zextOrTrunc(Target->getPointerWidth(getTargetAddressSpace(EltTy))); 1685 1686 llvm::FoldingSetNodeID ID; 1687 ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, IndexTypeQuals); 1688 1689 void *InsertPos = 0; 1690 if (ConstantArrayType *ATP = 1691 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1692 return QualType(ATP, 0); 1693 1694 // If the element type isn't canonical or has qualifiers, this won't 1695 // be a canonical type either, so fill in the canonical type field. 1696 QualType Canon; 1697 if (!EltTy.isCanonical() || EltTy.hasLocalQualifiers()) { 1698 SplitQualType canonSplit = getCanonicalType(EltTy).split(); 1699 Canon = getConstantArrayType(QualType(canonSplit.first, 0), ArySize, 1700 ASM, IndexTypeQuals); 1701 Canon = getQualifiedType(Canon, canonSplit.second); 1702 1703 // Get the new insert position for the node we care about. 1704 ConstantArrayType *NewIP = 1705 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1706 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1707 } 1708 1709 ConstantArrayType *New = new(*this,TypeAlignment) 1710 ConstantArrayType(EltTy, Canon, ArySize, ASM, IndexTypeQuals); 1711 ConstantArrayTypes.InsertNode(New, InsertPos); 1712 Types.push_back(New); 1713 return QualType(New, 0); 1714} 1715 1716/// getVariableArrayDecayedType - Turns the given type, which may be 1717/// variably-modified, into the corresponding type with all the known 1718/// sizes replaced with [*]. 1719QualType ASTContext::getVariableArrayDecayedType(QualType type) const { 1720 // Vastly most common case. 1721 if (!type->isVariablyModifiedType()) return type; 1722 1723 QualType result; 1724 1725 SplitQualType split = type.getSplitDesugaredType(); 1726 const Type *ty = split.first; 1727 switch (ty->getTypeClass()) { 1728#define TYPE(Class, Base) 1729#define ABSTRACT_TYPE(Class, Base) 1730#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 1731#include "clang/AST/TypeNodes.def" 1732 llvm_unreachable("didn't desugar past all non-canonical types?"); 1733 1734 // These types should never be variably-modified. 1735 case Type::Builtin: 1736 case Type::Complex: 1737 case Type::Vector: 1738 case Type::ExtVector: 1739 case Type::DependentSizedExtVector: 1740 case Type::ObjCObject: 1741 case Type::ObjCInterface: 1742 case Type::ObjCObjectPointer: 1743 case Type::Record: 1744 case Type::Enum: 1745 case Type::UnresolvedUsing: 1746 case Type::TypeOfExpr: 1747 case Type::TypeOf: 1748 case Type::Decltype: 1749 case Type::UnaryTransform: 1750 case Type::DependentName: 1751 case Type::InjectedClassName: 1752 case Type::TemplateSpecialization: 1753 case Type::DependentTemplateSpecialization: 1754 case Type::TemplateTypeParm: 1755 case Type::SubstTemplateTypeParmPack: 1756 case Type::Auto: 1757 case Type::PackExpansion: 1758 llvm_unreachable("type should never be variably-modified"); 1759 1760 // These types can be variably-modified but should never need to 1761 // further decay. 1762 case Type::FunctionNoProto: 1763 case Type::FunctionProto: 1764 case Type::BlockPointer: 1765 case Type::MemberPointer: 1766 return type; 1767 1768 // These types can be variably-modified. All these modifications 1769 // preserve structure except as noted by comments. 1770 // TODO: if we ever care about optimizing VLAs, there are no-op 1771 // optimizations available here. 1772 case Type::Pointer: 1773 result = getPointerType(getVariableArrayDecayedType( 1774 cast<PointerType>(ty)->getPointeeType())); 1775 break; 1776 1777 case Type::LValueReference: { 1778 const LValueReferenceType *lv = cast<LValueReferenceType>(ty); 1779 result = getLValueReferenceType( 1780 getVariableArrayDecayedType(lv->getPointeeType()), 1781 lv->isSpelledAsLValue()); 1782 break; 1783 } 1784 1785 case Type::RValueReference: { 1786 const RValueReferenceType *lv = cast<RValueReferenceType>(ty); 1787 result = getRValueReferenceType( 1788 getVariableArrayDecayedType(lv->getPointeeType())); 1789 break; 1790 } 1791 1792 case Type::Atomic: { 1793 const AtomicType *at = cast<AtomicType>(ty); 1794 result = getAtomicType(getVariableArrayDecayedType(at->getValueType())); 1795 break; 1796 } 1797 1798 case Type::ConstantArray: { 1799 const ConstantArrayType *cat = cast<ConstantArrayType>(ty); 1800 result = getConstantArrayType( 1801 getVariableArrayDecayedType(cat->getElementType()), 1802 cat->getSize(), 1803 cat->getSizeModifier(), 1804 cat->getIndexTypeCVRQualifiers()); 1805 break; 1806 } 1807 1808 case Type::DependentSizedArray: { 1809 const DependentSizedArrayType *dat = cast<DependentSizedArrayType>(ty); 1810 result = getDependentSizedArrayType( 1811 getVariableArrayDecayedType(dat->getElementType()), 1812 dat->getSizeExpr(), 1813 dat->getSizeModifier(), 1814 dat->getIndexTypeCVRQualifiers(), 1815 dat->getBracketsRange()); 1816 break; 1817 } 1818 1819 // Turn incomplete types into [*] types. 1820 case Type::IncompleteArray: { 1821 const IncompleteArrayType *iat = cast<IncompleteArrayType>(ty); 1822 result = getVariableArrayType( 1823 getVariableArrayDecayedType(iat->getElementType()), 1824 /*size*/ 0, 1825 ArrayType::Normal, 1826 iat->getIndexTypeCVRQualifiers(), 1827 SourceRange()); 1828 break; 1829 } 1830 1831 // Turn VLA types into [*] types. 1832 case Type::VariableArray: { 1833 const VariableArrayType *vat = cast<VariableArrayType>(ty); 1834 result = getVariableArrayType( 1835 getVariableArrayDecayedType(vat->getElementType()), 1836 /*size*/ 0, 1837 ArrayType::Star, 1838 vat->getIndexTypeCVRQualifiers(), 1839 vat->getBracketsRange()); 1840 break; 1841 } 1842 } 1843 1844 // Apply the top-level qualifiers from the original. 1845 return getQualifiedType(result, split.second); 1846} 1847 1848/// getVariableArrayType - Returns a non-unique reference to the type for a 1849/// variable array of the specified element type. 1850QualType ASTContext::getVariableArrayType(QualType EltTy, 1851 Expr *NumElts, 1852 ArrayType::ArraySizeModifier ASM, 1853 unsigned IndexTypeQuals, 1854 SourceRange Brackets) const { 1855 // Since we don't unique expressions, it isn't possible to unique VLA's 1856 // that have an expression provided for their size. 1857 QualType Canon; 1858 1859 // Be sure to pull qualifiers off the element type. 1860 if (!EltTy.isCanonical() || EltTy.hasLocalQualifiers()) { 1861 SplitQualType canonSplit = getCanonicalType(EltTy).split(); 1862 Canon = getVariableArrayType(QualType(canonSplit.first, 0), NumElts, ASM, 1863 IndexTypeQuals, Brackets); 1864 Canon = getQualifiedType(Canon, canonSplit.second); 1865 } 1866 1867 VariableArrayType *New = new(*this, TypeAlignment) 1868 VariableArrayType(EltTy, Canon, NumElts, ASM, IndexTypeQuals, Brackets); 1869 1870 VariableArrayTypes.push_back(New); 1871 Types.push_back(New); 1872 return QualType(New, 0); 1873} 1874 1875/// getDependentSizedArrayType - Returns a non-unique reference to 1876/// the type for a dependently-sized array of the specified element 1877/// type. 1878QualType ASTContext::getDependentSizedArrayType(QualType elementType, 1879 Expr *numElements, 1880 ArrayType::ArraySizeModifier ASM, 1881 unsigned elementTypeQuals, 1882 SourceRange brackets) const { 1883 assert((!numElements || numElements->isTypeDependent() || 1884 numElements->isValueDependent()) && 1885 "Size must be type- or value-dependent!"); 1886 1887 // Dependently-sized array types that do not have a specified number 1888 // of elements will have their sizes deduced from a dependent 1889 // initializer. We do no canonicalization here at all, which is okay 1890 // because they can't be used in most locations. 1891 if (!numElements) { 1892 DependentSizedArrayType *newType 1893 = new (*this, TypeAlignment) 1894 DependentSizedArrayType(*this, elementType, QualType(), 1895 numElements, ASM, elementTypeQuals, 1896 brackets); 1897 Types.push_back(newType); 1898 return QualType(newType, 0); 1899 } 1900 1901 // Otherwise, we actually build a new type every time, but we 1902 // also build a canonical type. 1903 1904 SplitQualType canonElementType = getCanonicalType(elementType).split(); 1905 1906 void *insertPos = 0; 1907 llvm::FoldingSetNodeID ID; 1908 DependentSizedArrayType::Profile(ID, *this, 1909 QualType(canonElementType.first, 0), 1910 ASM, elementTypeQuals, numElements); 1911 1912 // Look for an existing type with these properties. 1913 DependentSizedArrayType *canonTy = 1914 DependentSizedArrayTypes.FindNodeOrInsertPos(ID, insertPos); 1915 1916 // If we don't have one, build one. 1917 if (!canonTy) { 1918 canonTy = new (*this, TypeAlignment) 1919 DependentSizedArrayType(*this, QualType(canonElementType.first, 0), 1920 QualType(), numElements, ASM, elementTypeQuals, 1921 brackets); 1922 DependentSizedArrayTypes.InsertNode(canonTy, insertPos); 1923 Types.push_back(canonTy); 1924 } 1925 1926 // Apply qualifiers from the element type to the array. 1927 QualType canon = getQualifiedType(QualType(canonTy,0), 1928 canonElementType.second); 1929 1930 // If we didn't need extra canonicalization for the element type, 1931 // then just use that as our result. 1932 if (QualType(canonElementType.first, 0) == elementType) 1933 return canon; 1934 1935 // Otherwise, we need to build a type which follows the spelling 1936 // of the element type. 1937 DependentSizedArrayType *sugaredType 1938 = new (*this, TypeAlignment) 1939 DependentSizedArrayType(*this, elementType, canon, numElements, 1940 ASM, elementTypeQuals, brackets); 1941 Types.push_back(sugaredType); 1942 return QualType(sugaredType, 0); 1943} 1944 1945QualType ASTContext::getIncompleteArrayType(QualType elementType, 1946 ArrayType::ArraySizeModifier ASM, 1947 unsigned elementTypeQuals) const { 1948 llvm::FoldingSetNodeID ID; 1949 IncompleteArrayType::Profile(ID, elementType, ASM, elementTypeQuals); 1950 1951 void *insertPos = 0; 1952 if (IncompleteArrayType *iat = 1953 IncompleteArrayTypes.FindNodeOrInsertPos(ID, insertPos)) 1954 return QualType(iat, 0); 1955 1956 // If the element type isn't canonical, this won't be a canonical type 1957 // either, so fill in the canonical type field. We also have to pull 1958 // qualifiers off the element type. 1959 QualType canon; 1960 1961 if (!elementType.isCanonical() || elementType.hasLocalQualifiers()) { 1962 SplitQualType canonSplit = getCanonicalType(elementType).split(); 1963 canon = getIncompleteArrayType(QualType(canonSplit.first, 0), 1964 ASM, elementTypeQuals); 1965 canon = getQualifiedType(canon, canonSplit.second); 1966 1967 // Get the new insert position for the node we care about. 1968 IncompleteArrayType *existing = 1969 IncompleteArrayTypes.FindNodeOrInsertPos(ID, insertPos); 1970 assert(!existing && "Shouldn't be in the map!"); (void) existing; 1971 } 1972 1973 IncompleteArrayType *newType = new (*this, TypeAlignment) 1974 IncompleteArrayType(elementType, canon, ASM, elementTypeQuals); 1975 1976 IncompleteArrayTypes.InsertNode(newType, insertPos); 1977 Types.push_back(newType); 1978 return QualType(newType, 0); 1979} 1980 1981/// getVectorType - Return the unique reference to a vector type of 1982/// the specified element type and size. VectorType must be a built-in type. 1983QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts, 1984 VectorType::VectorKind VecKind) const { 1985 assert(vecType->isBuiltinType()); 1986 1987 // Check if we've already instantiated a vector of this type. 1988 llvm::FoldingSetNodeID ID; 1989 VectorType::Profile(ID, vecType, NumElts, Type::Vector, VecKind); 1990 1991 void *InsertPos = 0; 1992 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1993 return QualType(VTP, 0); 1994 1995 // If the element type isn't canonical, this won't be a canonical type either, 1996 // so fill in the canonical type field. 1997 QualType Canonical; 1998 if (!vecType.isCanonical()) { 1999 Canonical = getVectorType(getCanonicalType(vecType), NumElts, VecKind); 2000 2001 // Get the new insert position for the node we care about. 2002 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 2003 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 2004 } 2005 VectorType *New = new (*this, TypeAlignment) 2006 VectorType(vecType, NumElts, Canonical, VecKind); 2007 VectorTypes.InsertNode(New, InsertPos); 2008 Types.push_back(New); 2009 return QualType(New, 0); 2010} 2011 2012/// getExtVectorType - Return the unique reference to an extended vector type of 2013/// the specified element type and size. VectorType must be a built-in type. 2014QualType 2015ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) const { 2016 assert(vecType->isBuiltinType() || vecType->isDependentType()); 2017 2018 // Check if we've already instantiated a vector of this type. 2019 llvm::FoldingSetNodeID ID; 2020 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector, 2021 VectorType::GenericVector); 2022 void *InsertPos = 0; 2023 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 2024 return QualType(VTP, 0); 2025 2026 // If the element type isn't canonical, this won't be a canonical type either, 2027 // so fill in the canonical type field. 2028 QualType Canonical; 2029 if (!vecType.isCanonical()) { 2030 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts); 2031 2032 // Get the new insert position for the node we care about. 2033 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 2034 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 2035 } 2036 ExtVectorType *New = new (*this, TypeAlignment) 2037 ExtVectorType(vecType, NumElts, Canonical); 2038 VectorTypes.InsertNode(New, InsertPos); 2039 Types.push_back(New); 2040 return QualType(New, 0); 2041} 2042 2043QualType 2044ASTContext::getDependentSizedExtVectorType(QualType vecType, 2045 Expr *SizeExpr, 2046 SourceLocation AttrLoc) const { 2047 llvm::FoldingSetNodeID ID; 2048 DependentSizedExtVectorType::Profile(ID, *this, getCanonicalType(vecType), 2049 SizeExpr); 2050 2051 void *InsertPos = 0; 2052 DependentSizedExtVectorType *Canon 2053 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 2054 DependentSizedExtVectorType *New; 2055 if (Canon) { 2056 // We already have a canonical version of this array type; use it as 2057 // the canonical type for a newly-built type. 2058 New = new (*this, TypeAlignment) 2059 DependentSizedExtVectorType(*this, vecType, QualType(Canon, 0), 2060 SizeExpr, AttrLoc); 2061 } else { 2062 QualType CanonVecTy = getCanonicalType(vecType); 2063 if (CanonVecTy == vecType) { 2064 New = new (*this, TypeAlignment) 2065 DependentSizedExtVectorType(*this, vecType, QualType(), SizeExpr, 2066 AttrLoc); 2067 2068 DependentSizedExtVectorType *CanonCheck 2069 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 2070 assert(!CanonCheck && "Dependent-sized ext_vector canonical type broken"); 2071 (void)CanonCheck; 2072 DependentSizedExtVectorTypes.InsertNode(New, InsertPos); 2073 } else { 2074 QualType Canon = getDependentSizedExtVectorType(CanonVecTy, SizeExpr, 2075 SourceLocation()); 2076 New = new (*this, TypeAlignment) 2077 DependentSizedExtVectorType(*this, vecType, Canon, SizeExpr, AttrLoc); 2078 } 2079 } 2080 2081 Types.push_back(New); 2082 return QualType(New, 0); 2083} 2084 2085/// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 2086/// 2087QualType 2088ASTContext::getFunctionNoProtoType(QualType ResultTy, 2089 const FunctionType::ExtInfo &Info) const { 2090 const CallingConv DefaultCC = Info.getCC(); 2091 const CallingConv CallConv = (LangOpts.MRTD && DefaultCC == CC_Default) ? 2092 CC_X86StdCall : DefaultCC; 2093 // Unique functions, to guarantee there is only one function of a particular 2094 // structure. 2095 llvm::FoldingSetNodeID ID; 2096 FunctionNoProtoType::Profile(ID, ResultTy, Info); 2097 2098 void *InsertPos = 0; 2099 if (FunctionNoProtoType *FT = 2100 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 2101 return QualType(FT, 0); 2102 2103 QualType Canonical; 2104 if (!ResultTy.isCanonical() || 2105 getCanonicalCallConv(CallConv) != CallConv) { 2106 Canonical = 2107 getFunctionNoProtoType(getCanonicalType(ResultTy), 2108 Info.withCallingConv(getCanonicalCallConv(CallConv))); 2109 2110 // Get the new insert position for the node we care about. 2111 FunctionNoProtoType *NewIP = 2112 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 2113 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 2114 } 2115 2116 FunctionProtoType::ExtInfo newInfo = Info.withCallingConv(CallConv); 2117 FunctionNoProtoType *New = new (*this, TypeAlignment) 2118 FunctionNoProtoType(ResultTy, Canonical, newInfo); 2119 Types.push_back(New); 2120 FunctionNoProtoTypes.InsertNode(New, InsertPos); 2121 return QualType(New, 0); 2122} 2123 2124/// getFunctionType - Return a normal function type with a typed argument 2125/// list. isVariadic indicates whether the argument list includes '...'. 2126QualType 2127ASTContext::getFunctionType(QualType ResultTy, 2128 const QualType *ArgArray, unsigned NumArgs, 2129 const FunctionProtoType::ExtProtoInfo &EPI) const { 2130 // Unique functions, to guarantee there is only one function of a particular 2131 // structure. 2132 llvm::FoldingSetNodeID ID; 2133 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, EPI, *this); 2134 2135 void *InsertPos = 0; 2136 if (FunctionProtoType *FTP = 2137 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 2138 return QualType(FTP, 0); 2139 2140 // Determine whether the type being created is already canonical or not. 2141 bool isCanonical= EPI.ExceptionSpecType == EST_None && ResultTy.isCanonical(); 2142 for (unsigned i = 0; i != NumArgs && isCanonical; ++i) 2143 if (!ArgArray[i].isCanonicalAsParam()) 2144 isCanonical = false; 2145 2146 const CallingConv DefaultCC = EPI.ExtInfo.getCC(); 2147 const CallingConv CallConv = (LangOpts.MRTD && DefaultCC == CC_Default) ? 2148 CC_X86StdCall : DefaultCC; 2149 2150 // If this type isn't canonical, get the canonical version of it. 2151 // The exception spec is not part of the canonical type. 2152 QualType Canonical; 2153 if (!isCanonical || getCanonicalCallConv(CallConv) != CallConv) { 2154 SmallVector<QualType, 16> CanonicalArgs; 2155 CanonicalArgs.reserve(NumArgs); 2156 for (unsigned i = 0; i != NumArgs; ++i) 2157 CanonicalArgs.push_back(getCanonicalParamType(ArgArray[i])); 2158 2159 FunctionProtoType::ExtProtoInfo CanonicalEPI = EPI; 2160 CanonicalEPI.ExceptionSpecType = EST_None; 2161 CanonicalEPI.NumExceptions = 0; 2162 CanonicalEPI.ExtInfo 2163 = CanonicalEPI.ExtInfo.withCallingConv(getCanonicalCallConv(CallConv)); 2164 2165 Canonical = getFunctionType(getCanonicalType(ResultTy), 2166 CanonicalArgs.data(), NumArgs, 2167 CanonicalEPI); 2168 2169 // Get the new insert position for the node we care about. 2170 FunctionProtoType *NewIP = 2171 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 2172 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 2173 } 2174 2175 // FunctionProtoType objects are allocated with extra bytes after 2176 // them for three variable size arrays at the end: 2177 // - parameter types 2178 // - exception types 2179 // - consumed-arguments flags 2180 // Instead of the exception types, there could be a noexcept 2181 // expression. 2182 size_t Size = sizeof(FunctionProtoType) + 2183 NumArgs * sizeof(QualType); 2184 if (EPI.ExceptionSpecType == EST_Dynamic) 2185 Size += EPI.NumExceptions * sizeof(QualType); 2186 else if (EPI.ExceptionSpecType == EST_ComputedNoexcept) { 2187 Size += sizeof(Expr*); 2188 } 2189 if (EPI.ConsumedArguments) 2190 Size += NumArgs * sizeof(bool); 2191 2192 FunctionProtoType *FTP = (FunctionProtoType*) Allocate(Size, TypeAlignment); 2193 FunctionProtoType::ExtProtoInfo newEPI = EPI; 2194 newEPI.ExtInfo = EPI.ExtInfo.withCallingConv(CallConv); 2195 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, Canonical, newEPI); 2196 Types.push_back(FTP); 2197 FunctionProtoTypes.InsertNode(FTP, InsertPos); 2198 return QualType(FTP, 0); 2199} 2200 2201#ifndef NDEBUG 2202static bool NeedsInjectedClassNameType(const RecordDecl *D) { 2203 if (!isa<CXXRecordDecl>(D)) return false; 2204 const CXXRecordDecl *RD = cast<CXXRecordDecl>(D); 2205 if (isa<ClassTemplatePartialSpecializationDecl>(RD)) 2206 return true; 2207 if (RD->getDescribedClassTemplate() && 2208 !isa<ClassTemplateSpecializationDecl>(RD)) 2209 return true; 2210 return false; 2211} 2212#endif 2213 2214/// getInjectedClassNameType - Return the unique reference to the 2215/// injected class name type for the specified templated declaration. 2216QualType ASTContext::getInjectedClassNameType(CXXRecordDecl *Decl, 2217 QualType TST) const { 2218 assert(NeedsInjectedClassNameType(Decl)); 2219 if (Decl->TypeForDecl) { 2220 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 2221 } else if (CXXRecordDecl *PrevDecl = Decl->getPreviousDecl()) { 2222 assert(PrevDecl->TypeForDecl && "previous declaration has no type"); 2223 Decl->TypeForDecl = PrevDecl->TypeForDecl; 2224 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 2225 } else { 2226 Type *newType = 2227 new (*this, TypeAlignment) InjectedClassNameType(Decl, TST); 2228 Decl->TypeForDecl = newType; 2229 Types.push_back(newType); 2230 } 2231 return QualType(Decl->TypeForDecl, 0); 2232} 2233 2234/// getTypeDeclType - Return the unique reference to the type for the 2235/// specified type declaration. 2236QualType ASTContext::getTypeDeclTypeSlow(const TypeDecl *Decl) const { 2237 assert(Decl && "Passed null for Decl param"); 2238 assert(!Decl->TypeForDecl && "TypeForDecl present in slow case"); 2239 2240 if (const TypedefNameDecl *Typedef = dyn_cast<TypedefNameDecl>(Decl)) 2241 return getTypedefType(Typedef); 2242 2243 assert(!isa<TemplateTypeParmDecl>(Decl) && 2244 "Template type parameter types are always available."); 2245 2246 if (const RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) { 2247 assert(!Record->getPreviousDecl() && 2248 "struct/union has previous declaration"); 2249 assert(!NeedsInjectedClassNameType(Record)); 2250 return getRecordType(Record); 2251 } else if (const EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) { 2252 assert(!Enum->getPreviousDecl() && 2253 "enum has previous declaration"); 2254 return getEnumType(Enum); 2255 } else if (const UnresolvedUsingTypenameDecl *Using = 2256 dyn_cast<UnresolvedUsingTypenameDecl>(Decl)) { 2257 Type *newType = new (*this, TypeAlignment) UnresolvedUsingType(Using); 2258 Decl->TypeForDecl = newType; 2259 Types.push_back(newType); 2260 } else 2261 llvm_unreachable("TypeDecl without a type?"); 2262 2263 return QualType(Decl->TypeForDecl, 0); 2264} 2265 2266/// getTypedefType - Return the unique reference to the type for the 2267/// specified typedef name decl. 2268QualType 2269ASTContext::getTypedefType(const TypedefNameDecl *Decl, 2270 QualType Canonical) const { 2271 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2272 2273 if (Canonical.isNull()) 2274 Canonical = getCanonicalType(Decl->getUnderlyingType()); 2275 TypedefType *newType = new(*this, TypeAlignment) 2276 TypedefType(Type::Typedef, Decl, Canonical); 2277 Decl->TypeForDecl = newType; 2278 Types.push_back(newType); 2279 return QualType(newType, 0); 2280} 2281 2282QualType ASTContext::getRecordType(const RecordDecl *Decl) const { 2283 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2284 2285 if (const RecordDecl *PrevDecl = Decl->getPreviousDecl()) 2286 if (PrevDecl->TypeForDecl) 2287 return QualType(Decl->TypeForDecl = PrevDecl->TypeForDecl, 0); 2288 2289 RecordType *newType = new (*this, TypeAlignment) RecordType(Decl); 2290 Decl->TypeForDecl = newType; 2291 Types.push_back(newType); 2292 return QualType(newType, 0); 2293} 2294 2295QualType ASTContext::getEnumType(const EnumDecl *Decl) const { 2296 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2297 2298 if (const EnumDecl *PrevDecl = Decl->getPreviousDecl()) 2299 if (PrevDecl->TypeForDecl) 2300 return QualType(Decl->TypeForDecl = PrevDecl->TypeForDecl, 0); 2301 2302 EnumType *newType = new (*this, TypeAlignment) EnumType(Decl); 2303 Decl->TypeForDecl = newType; 2304 Types.push_back(newType); 2305 return QualType(newType, 0); 2306} 2307 2308QualType ASTContext::getAttributedType(AttributedType::Kind attrKind, 2309 QualType modifiedType, 2310 QualType equivalentType) { 2311 llvm::FoldingSetNodeID id; 2312 AttributedType::Profile(id, attrKind, modifiedType, equivalentType); 2313 2314 void *insertPos = 0; 2315 AttributedType *type = AttributedTypes.FindNodeOrInsertPos(id, insertPos); 2316 if (type) return QualType(type, 0); 2317 2318 QualType canon = getCanonicalType(equivalentType); 2319 type = new (*this, TypeAlignment) 2320 AttributedType(canon, attrKind, modifiedType, equivalentType); 2321 2322 Types.push_back(type); 2323 AttributedTypes.InsertNode(type, insertPos); 2324 2325 return QualType(type, 0); 2326} 2327 2328 2329/// \brief Retrieve a substitution-result type. 2330QualType 2331ASTContext::getSubstTemplateTypeParmType(const TemplateTypeParmType *Parm, 2332 QualType Replacement) const { 2333 assert(Replacement.isCanonical() 2334 && "replacement types must always be canonical"); 2335 2336 llvm::FoldingSetNodeID ID; 2337 SubstTemplateTypeParmType::Profile(ID, Parm, Replacement); 2338 void *InsertPos = 0; 2339 SubstTemplateTypeParmType *SubstParm 2340 = SubstTemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2341 2342 if (!SubstParm) { 2343 SubstParm = new (*this, TypeAlignment) 2344 SubstTemplateTypeParmType(Parm, Replacement); 2345 Types.push_back(SubstParm); 2346 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 2347 } 2348 2349 return QualType(SubstParm, 0); 2350} 2351 2352/// \brief Retrieve a 2353QualType ASTContext::getSubstTemplateTypeParmPackType( 2354 const TemplateTypeParmType *Parm, 2355 const TemplateArgument &ArgPack) { 2356#ifndef NDEBUG 2357 for (TemplateArgument::pack_iterator P = ArgPack.pack_begin(), 2358 PEnd = ArgPack.pack_end(); 2359 P != PEnd; ++P) { 2360 assert(P->getKind() == TemplateArgument::Type &&"Pack contains a non-type"); 2361 assert(P->getAsType().isCanonical() && "Pack contains non-canonical type"); 2362 } 2363#endif 2364 2365 llvm::FoldingSetNodeID ID; 2366 SubstTemplateTypeParmPackType::Profile(ID, Parm, ArgPack); 2367 void *InsertPos = 0; 2368 if (SubstTemplateTypeParmPackType *SubstParm 2369 = SubstTemplateTypeParmPackTypes.FindNodeOrInsertPos(ID, InsertPos)) 2370 return QualType(SubstParm, 0); 2371 2372 QualType Canon; 2373 if (!Parm->isCanonicalUnqualified()) { 2374 Canon = getCanonicalType(QualType(Parm, 0)); 2375 Canon = getSubstTemplateTypeParmPackType(cast<TemplateTypeParmType>(Canon), 2376 ArgPack); 2377 SubstTemplateTypeParmPackTypes.FindNodeOrInsertPos(ID, InsertPos); 2378 } 2379 2380 SubstTemplateTypeParmPackType *SubstParm 2381 = new (*this, TypeAlignment) SubstTemplateTypeParmPackType(Parm, Canon, 2382 ArgPack); 2383 Types.push_back(SubstParm); 2384 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 2385 return QualType(SubstParm, 0); 2386} 2387 2388/// \brief Retrieve the template type parameter type for a template 2389/// parameter or parameter pack with the given depth, index, and (optionally) 2390/// name. 2391QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index, 2392 bool ParameterPack, 2393 TemplateTypeParmDecl *TTPDecl) const { 2394 llvm::FoldingSetNodeID ID; 2395 TemplateTypeParmType::Profile(ID, Depth, Index, ParameterPack, TTPDecl); 2396 void *InsertPos = 0; 2397 TemplateTypeParmType *TypeParm 2398 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2399 2400 if (TypeParm) 2401 return QualType(TypeParm, 0); 2402 2403 if (TTPDecl) { 2404 QualType Canon = getTemplateTypeParmType(Depth, Index, ParameterPack); 2405 TypeParm = new (*this, TypeAlignment) TemplateTypeParmType(TTPDecl, Canon); 2406 2407 TemplateTypeParmType *TypeCheck 2408 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2409 assert(!TypeCheck && "Template type parameter canonical type broken"); 2410 (void)TypeCheck; 2411 } else 2412 TypeParm = new (*this, TypeAlignment) 2413 TemplateTypeParmType(Depth, Index, ParameterPack); 2414 2415 Types.push_back(TypeParm); 2416 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos); 2417 2418 return QualType(TypeParm, 0); 2419} 2420 2421TypeSourceInfo * 2422ASTContext::getTemplateSpecializationTypeInfo(TemplateName Name, 2423 SourceLocation NameLoc, 2424 const TemplateArgumentListInfo &Args, 2425 QualType Underlying) const { 2426 assert(!Name.getAsDependentTemplateName() && 2427 "No dependent template names here!"); 2428 QualType TST = getTemplateSpecializationType(Name, Args, Underlying); 2429 2430 TypeSourceInfo *DI = CreateTypeSourceInfo(TST); 2431 TemplateSpecializationTypeLoc TL 2432 = cast<TemplateSpecializationTypeLoc>(DI->getTypeLoc()); 2433 TL.setTemplateNameLoc(NameLoc); 2434 TL.setLAngleLoc(Args.getLAngleLoc()); 2435 TL.setRAngleLoc(Args.getRAngleLoc()); 2436 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 2437 TL.setArgLocInfo(i, Args[i].getLocInfo()); 2438 return DI; 2439} 2440 2441QualType 2442ASTContext::getTemplateSpecializationType(TemplateName Template, 2443 const TemplateArgumentListInfo &Args, 2444 QualType Underlying) const { 2445 assert(!Template.getAsDependentTemplateName() && 2446 "No dependent template names here!"); 2447 2448 unsigned NumArgs = Args.size(); 2449 2450 SmallVector<TemplateArgument, 4> ArgVec; 2451 ArgVec.reserve(NumArgs); 2452 for (unsigned i = 0; i != NumArgs; ++i) 2453 ArgVec.push_back(Args[i].getArgument()); 2454 2455 return getTemplateSpecializationType(Template, ArgVec.data(), NumArgs, 2456 Underlying); 2457} 2458 2459#ifndef NDEBUG 2460static bool hasAnyPackExpansions(const TemplateArgument *Args, 2461 unsigned NumArgs) { 2462 for (unsigned I = 0; I != NumArgs; ++I) 2463 if (Args[I].isPackExpansion()) 2464 return true; 2465 2466 return true; 2467} 2468#endif 2469 2470QualType 2471ASTContext::getTemplateSpecializationType(TemplateName Template, 2472 const TemplateArgument *Args, 2473 unsigned NumArgs, 2474 QualType Underlying) const { 2475 assert(!Template.getAsDependentTemplateName() && 2476 "No dependent template names here!"); 2477 // Look through qualified template names. 2478 if (QualifiedTemplateName *QTN = Template.getAsQualifiedTemplateName()) 2479 Template = TemplateName(QTN->getTemplateDecl()); 2480 2481 bool IsTypeAlias = 2482 Template.getAsTemplateDecl() && 2483 isa<TypeAliasTemplateDecl>(Template.getAsTemplateDecl()); 2484 QualType CanonType; 2485 if (!Underlying.isNull()) 2486 CanonType = getCanonicalType(Underlying); 2487 else { 2488 // We can get here with an alias template when the specialization contains 2489 // a pack expansion that does not match up with a parameter pack. 2490 assert((!IsTypeAlias || hasAnyPackExpansions(Args, NumArgs)) && 2491 "Caller must compute aliased type"); 2492 IsTypeAlias = false; 2493 CanonType = getCanonicalTemplateSpecializationType(Template, Args, 2494 NumArgs); 2495 } 2496 2497 // Allocate the (non-canonical) template specialization type, but don't 2498 // try to unique it: these types typically have location information that 2499 // we don't unique and don't want to lose. 2500 void *Mem = Allocate(sizeof(TemplateSpecializationType) + 2501 sizeof(TemplateArgument) * NumArgs + 2502 (IsTypeAlias? sizeof(QualType) : 0), 2503 TypeAlignment); 2504 TemplateSpecializationType *Spec 2505 = new (Mem) TemplateSpecializationType(Template, Args, NumArgs, CanonType, 2506 IsTypeAlias ? Underlying : QualType()); 2507 2508 Types.push_back(Spec); 2509 return QualType(Spec, 0); 2510} 2511 2512QualType 2513ASTContext::getCanonicalTemplateSpecializationType(TemplateName Template, 2514 const TemplateArgument *Args, 2515 unsigned NumArgs) const { 2516 assert(!Template.getAsDependentTemplateName() && 2517 "No dependent template names here!"); 2518 2519 // Look through qualified template names. 2520 if (QualifiedTemplateName *QTN = Template.getAsQualifiedTemplateName()) 2521 Template = TemplateName(QTN->getTemplateDecl()); 2522 2523 // Build the canonical template specialization type. 2524 TemplateName CanonTemplate = getCanonicalTemplateName(Template); 2525 SmallVector<TemplateArgument, 4> CanonArgs; 2526 CanonArgs.reserve(NumArgs); 2527 for (unsigned I = 0; I != NumArgs; ++I) 2528 CanonArgs.push_back(getCanonicalTemplateArgument(Args[I])); 2529 2530 // Determine whether this canonical template specialization type already 2531 // exists. 2532 llvm::FoldingSetNodeID ID; 2533 TemplateSpecializationType::Profile(ID, CanonTemplate, 2534 CanonArgs.data(), NumArgs, *this); 2535 2536 void *InsertPos = 0; 2537 TemplateSpecializationType *Spec 2538 = TemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2539 2540 if (!Spec) { 2541 // Allocate a new canonical template specialization type. 2542 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 2543 sizeof(TemplateArgument) * NumArgs), 2544 TypeAlignment); 2545 Spec = new (Mem) TemplateSpecializationType(CanonTemplate, 2546 CanonArgs.data(), NumArgs, 2547 QualType(), QualType()); 2548 Types.push_back(Spec); 2549 TemplateSpecializationTypes.InsertNode(Spec, InsertPos); 2550 } 2551 2552 assert(Spec->isDependentType() && 2553 "Non-dependent template-id type must have a canonical type"); 2554 return QualType(Spec, 0); 2555} 2556 2557QualType 2558ASTContext::getElaboratedType(ElaboratedTypeKeyword Keyword, 2559 NestedNameSpecifier *NNS, 2560 QualType NamedType) const { 2561 llvm::FoldingSetNodeID ID; 2562 ElaboratedType::Profile(ID, Keyword, NNS, NamedType); 2563 2564 void *InsertPos = 0; 2565 ElaboratedType *T = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2566 if (T) 2567 return QualType(T, 0); 2568 2569 QualType Canon = NamedType; 2570 if (!Canon.isCanonical()) { 2571 Canon = getCanonicalType(NamedType); 2572 ElaboratedType *CheckT = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2573 assert(!CheckT && "Elaborated canonical type broken"); 2574 (void)CheckT; 2575 } 2576 2577 T = new (*this) ElaboratedType(Keyword, NNS, NamedType, Canon); 2578 Types.push_back(T); 2579 ElaboratedTypes.InsertNode(T, InsertPos); 2580 return QualType(T, 0); 2581} 2582 2583QualType 2584ASTContext::getParenType(QualType InnerType) const { 2585 llvm::FoldingSetNodeID ID; 2586 ParenType::Profile(ID, InnerType); 2587 2588 void *InsertPos = 0; 2589 ParenType *T = ParenTypes.FindNodeOrInsertPos(ID, InsertPos); 2590 if (T) 2591 return QualType(T, 0); 2592 2593 QualType Canon = InnerType; 2594 if (!Canon.isCanonical()) { 2595 Canon = getCanonicalType(InnerType); 2596 ParenType *CheckT = ParenTypes.FindNodeOrInsertPos(ID, InsertPos); 2597 assert(!CheckT && "Paren canonical type broken"); 2598 (void)CheckT; 2599 } 2600 2601 T = new (*this) ParenType(InnerType, Canon); 2602 Types.push_back(T); 2603 ParenTypes.InsertNode(T, InsertPos); 2604 return QualType(T, 0); 2605} 2606 2607QualType ASTContext::getDependentNameType(ElaboratedTypeKeyword Keyword, 2608 NestedNameSpecifier *NNS, 2609 const IdentifierInfo *Name, 2610 QualType Canon) const { 2611 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 2612 2613 if (Canon.isNull()) { 2614 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2615 ElaboratedTypeKeyword CanonKeyword = Keyword; 2616 if (Keyword == ETK_None) 2617 CanonKeyword = ETK_Typename; 2618 2619 if (CanonNNS != NNS || CanonKeyword != Keyword) 2620 Canon = getDependentNameType(CanonKeyword, CanonNNS, Name); 2621 } 2622 2623 llvm::FoldingSetNodeID ID; 2624 DependentNameType::Profile(ID, Keyword, NNS, Name); 2625 2626 void *InsertPos = 0; 2627 DependentNameType *T 2628 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 2629 if (T) 2630 return QualType(T, 0); 2631 2632 T = new (*this) DependentNameType(Keyword, NNS, Name, Canon); 2633 Types.push_back(T); 2634 DependentNameTypes.InsertNode(T, InsertPos); 2635 return QualType(T, 0); 2636} 2637 2638QualType 2639ASTContext::getDependentTemplateSpecializationType( 2640 ElaboratedTypeKeyword Keyword, 2641 NestedNameSpecifier *NNS, 2642 const IdentifierInfo *Name, 2643 const TemplateArgumentListInfo &Args) const { 2644 // TODO: avoid this copy 2645 SmallVector<TemplateArgument, 16> ArgCopy; 2646 for (unsigned I = 0, E = Args.size(); I != E; ++I) 2647 ArgCopy.push_back(Args[I].getArgument()); 2648 return getDependentTemplateSpecializationType(Keyword, NNS, Name, 2649 ArgCopy.size(), 2650 ArgCopy.data()); 2651} 2652 2653QualType 2654ASTContext::getDependentTemplateSpecializationType( 2655 ElaboratedTypeKeyword Keyword, 2656 NestedNameSpecifier *NNS, 2657 const IdentifierInfo *Name, 2658 unsigned NumArgs, 2659 const TemplateArgument *Args) const { 2660 assert((!NNS || NNS->isDependent()) && 2661 "nested-name-specifier must be dependent"); 2662 2663 llvm::FoldingSetNodeID ID; 2664 DependentTemplateSpecializationType::Profile(ID, *this, Keyword, NNS, 2665 Name, NumArgs, Args); 2666 2667 void *InsertPos = 0; 2668 DependentTemplateSpecializationType *T 2669 = DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2670 if (T) 2671 return QualType(T, 0); 2672 2673 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2674 2675 ElaboratedTypeKeyword CanonKeyword = Keyword; 2676 if (Keyword == ETK_None) CanonKeyword = ETK_Typename; 2677 2678 bool AnyNonCanonArgs = false; 2679 SmallVector<TemplateArgument, 16> CanonArgs(NumArgs); 2680 for (unsigned I = 0; I != NumArgs; ++I) { 2681 CanonArgs[I] = getCanonicalTemplateArgument(Args[I]); 2682 if (!CanonArgs[I].structurallyEquals(Args[I])) 2683 AnyNonCanonArgs = true; 2684 } 2685 2686 QualType Canon; 2687 if (AnyNonCanonArgs || CanonNNS != NNS || CanonKeyword != Keyword) { 2688 Canon = getDependentTemplateSpecializationType(CanonKeyword, CanonNNS, 2689 Name, NumArgs, 2690 CanonArgs.data()); 2691 2692 // Find the insert position again. 2693 DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2694 } 2695 2696 void *Mem = Allocate((sizeof(DependentTemplateSpecializationType) + 2697 sizeof(TemplateArgument) * NumArgs), 2698 TypeAlignment); 2699 T = new (Mem) DependentTemplateSpecializationType(Keyword, NNS, 2700 Name, NumArgs, Args, Canon); 2701 Types.push_back(T); 2702 DependentTemplateSpecializationTypes.InsertNode(T, InsertPos); 2703 return QualType(T, 0); 2704} 2705 2706QualType ASTContext::getPackExpansionType(QualType Pattern, 2707 llvm::Optional<unsigned> NumExpansions) { 2708 llvm::FoldingSetNodeID ID; 2709 PackExpansionType::Profile(ID, Pattern, NumExpansions); 2710 2711 assert(Pattern->containsUnexpandedParameterPack() && 2712 "Pack expansions must expand one or more parameter packs"); 2713 void *InsertPos = 0; 2714 PackExpansionType *T 2715 = PackExpansionTypes.FindNodeOrInsertPos(ID, InsertPos); 2716 if (T) 2717 return QualType(T, 0); 2718 2719 QualType Canon; 2720 if (!Pattern.isCanonical()) { 2721 Canon = getPackExpansionType(getCanonicalType(Pattern), NumExpansions); 2722 2723 // Find the insert position again. 2724 PackExpansionTypes.FindNodeOrInsertPos(ID, InsertPos); 2725 } 2726 2727 T = new (*this) PackExpansionType(Pattern, Canon, NumExpansions); 2728 Types.push_back(T); 2729 PackExpansionTypes.InsertNode(T, InsertPos); 2730 return QualType(T, 0); 2731} 2732 2733/// CmpProtocolNames - Comparison predicate for sorting protocols 2734/// alphabetically. 2735static bool CmpProtocolNames(const ObjCProtocolDecl *LHS, 2736 const ObjCProtocolDecl *RHS) { 2737 return LHS->getDeclName() < RHS->getDeclName(); 2738} 2739 2740static bool areSortedAndUniqued(ObjCProtocolDecl * const *Protocols, 2741 unsigned NumProtocols) { 2742 if (NumProtocols == 0) return true; 2743 2744 if (Protocols[0]->getCanonicalDecl() != Protocols[0]) 2745 return false; 2746 2747 for (unsigned i = 1; i != NumProtocols; ++i) 2748 if (!CmpProtocolNames(Protocols[i-1], Protocols[i]) || 2749 Protocols[i]->getCanonicalDecl() != Protocols[i]) 2750 return false; 2751 return true; 2752} 2753 2754static void SortAndUniqueProtocols(ObjCProtocolDecl **Protocols, 2755 unsigned &NumProtocols) { 2756 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols; 2757 2758 // Sort protocols, keyed by name. 2759 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames); 2760 2761 // Canonicalize. 2762 for (unsigned I = 0, N = NumProtocols; I != N; ++I) 2763 Protocols[I] = Protocols[I]->getCanonicalDecl(); 2764 2765 // Remove duplicates. 2766 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd); 2767 NumProtocols = ProtocolsEnd-Protocols; 2768} 2769 2770QualType ASTContext::getObjCObjectType(QualType BaseType, 2771 ObjCProtocolDecl * const *Protocols, 2772 unsigned NumProtocols) const { 2773 // If the base type is an interface and there aren't any protocols 2774 // to add, then the interface type will do just fine. 2775 if (!NumProtocols && isa<ObjCInterfaceType>(BaseType)) 2776 return BaseType; 2777 2778 // Look in the folding set for an existing type. 2779 llvm::FoldingSetNodeID ID; 2780 ObjCObjectTypeImpl::Profile(ID, BaseType, Protocols, NumProtocols); 2781 void *InsertPos = 0; 2782 if (ObjCObjectType *QT = ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos)) 2783 return QualType(QT, 0); 2784 2785 // Build the canonical type, which has the canonical base type and 2786 // a sorted-and-uniqued list of protocols. 2787 QualType Canonical; 2788 bool ProtocolsSorted = areSortedAndUniqued(Protocols, NumProtocols); 2789 if (!ProtocolsSorted || !BaseType.isCanonical()) { 2790 if (!ProtocolsSorted) { 2791 SmallVector<ObjCProtocolDecl*, 8> Sorted(Protocols, 2792 Protocols + NumProtocols); 2793 unsigned UniqueCount = NumProtocols; 2794 2795 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2796 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2797 &Sorted[0], UniqueCount); 2798 } else { 2799 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2800 Protocols, NumProtocols); 2801 } 2802 2803 // Regenerate InsertPos. 2804 ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos); 2805 } 2806 2807 unsigned Size = sizeof(ObjCObjectTypeImpl); 2808 Size += NumProtocols * sizeof(ObjCProtocolDecl *); 2809 void *Mem = Allocate(Size, TypeAlignment); 2810 ObjCObjectTypeImpl *T = 2811 new (Mem) ObjCObjectTypeImpl(Canonical, BaseType, Protocols, NumProtocols); 2812 2813 Types.push_back(T); 2814 ObjCObjectTypes.InsertNode(T, InsertPos); 2815 return QualType(T, 0); 2816} 2817 2818/// getObjCObjectPointerType - Return a ObjCObjectPointerType type for 2819/// the given object type. 2820QualType ASTContext::getObjCObjectPointerType(QualType ObjectT) const { 2821 llvm::FoldingSetNodeID ID; 2822 ObjCObjectPointerType::Profile(ID, ObjectT); 2823 2824 void *InsertPos = 0; 2825 if (ObjCObjectPointerType *QT = 2826 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 2827 return QualType(QT, 0); 2828 2829 // Find the canonical object type. 2830 QualType Canonical; 2831 if (!ObjectT.isCanonical()) { 2832 Canonical = getObjCObjectPointerType(getCanonicalType(ObjectT)); 2833 2834 // Regenerate InsertPos. 2835 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 2836 } 2837 2838 // No match. 2839 void *Mem = Allocate(sizeof(ObjCObjectPointerType), TypeAlignment); 2840 ObjCObjectPointerType *QType = 2841 new (Mem) ObjCObjectPointerType(Canonical, ObjectT); 2842 2843 Types.push_back(QType); 2844 ObjCObjectPointerTypes.InsertNode(QType, InsertPos); 2845 return QualType(QType, 0); 2846} 2847 2848/// getObjCInterfaceType - Return the unique reference to the type for the 2849/// specified ObjC interface decl. The list of protocols is optional. 2850QualType ASTContext::getObjCInterfaceType(const ObjCInterfaceDecl *Decl, 2851 ObjCInterfaceDecl *PrevDecl) const { 2852 if (Decl->TypeForDecl) 2853 return QualType(Decl->TypeForDecl, 0); 2854 2855 if (PrevDecl) { 2856 assert(PrevDecl->TypeForDecl && "previous decl has no TypeForDecl"); 2857 Decl->TypeForDecl = PrevDecl->TypeForDecl; 2858 return QualType(PrevDecl->TypeForDecl, 0); 2859 } 2860 2861 // Prefer the definition, if there is one. 2862 if (const ObjCInterfaceDecl *Def = Decl->getDefinition()) 2863 Decl = Def; 2864 2865 void *Mem = Allocate(sizeof(ObjCInterfaceType), TypeAlignment); 2866 ObjCInterfaceType *T = new (Mem) ObjCInterfaceType(Decl); 2867 Decl->TypeForDecl = T; 2868 Types.push_back(T); 2869 return QualType(T, 0); 2870} 2871 2872/// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique 2873/// TypeOfExprType AST's (since expression's are never shared). For example, 2874/// multiple declarations that refer to "typeof(x)" all contain different 2875/// DeclRefExpr's. This doesn't effect the type checker, since it operates 2876/// on canonical type's (which are always unique). 2877QualType ASTContext::getTypeOfExprType(Expr *tofExpr) const { 2878 TypeOfExprType *toe; 2879 if (tofExpr->isTypeDependent()) { 2880 llvm::FoldingSetNodeID ID; 2881 DependentTypeOfExprType::Profile(ID, *this, tofExpr); 2882 2883 void *InsertPos = 0; 2884 DependentTypeOfExprType *Canon 2885 = DependentTypeOfExprTypes.FindNodeOrInsertPos(ID, InsertPos); 2886 if (Canon) { 2887 // We already have a "canonical" version of an identical, dependent 2888 // typeof(expr) type. Use that as our canonical type. 2889 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, 2890 QualType((TypeOfExprType*)Canon, 0)); 2891 } else { 2892 // Build a new, canonical typeof(expr) type. 2893 Canon 2894 = new (*this, TypeAlignment) DependentTypeOfExprType(*this, tofExpr); 2895 DependentTypeOfExprTypes.InsertNode(Canon, InsertPos); 2896 toe = Canon; 2897 } 2898 } else { 2899 QualType Canonical = getCanonicalType(tofExpr->getType()); 2900 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, Canonical); 2901 } 2902 Types.push_back(toe); 2903 return QualType(toe, 0); 2904} 2905 2906/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique 2907/// TypeOfType AST's. The only motivation to unique these nodes would be 2908/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be 2909/// an issue. This doesn't effect the type checker, since it operates 2910/// on canonical type's (which are always unique). 2911QualType ASTContext::getTypeOfType(QualType tofType) const { 2912 QualType Canonical = getCanonicalType(tofType); 2913 TypeOfType *tot = new (*this, TypeAlignment) TypeOfType(tofType, Canonical); 2914 Types.push_back(tot); 2915 return QualType(tot, 0); 2916} 2917 2918/// getDecltypeForExpr - Given an expr, will return the decltype for that 2919/// expression, according to the rules in C++0x [dcl.type.simple]p4 2920static QualType getDecltypeForExpr(const Expr *e, const ASTContext &Context) { 2921 if (e->isTypeDependent()) 2922 return Context.DependentTy; 2923 2924 // If e is an id expression or a class member access, decltype(e) is defined 2925 // as the type of the entity named by e. 2926 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(e)) { 2927 if (const ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl())) 2928 return VD->getType(); 2929 } 2930 if (const MemberExpr *ME = dyn_cast<MemberExpr>(e)) { 2931 if (const FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) 2932 return FD->getType(); 2933 } 2934 // If e is a function call or an invocation of an overloaded operator, 2935 // (parentheses around e are ignored), decltype(e) is defined as the 2936 // return type of that function. 2937 if (const CallExpr *CE = dyn_cast<CallExpr>(e->IgnoreParens())) 2938 return CE->getCallReturnType(); 2939 2940 QualType T = e->getType(); 2941 2942 // Otherwise, where T is the type of e, if e is an lvalue, decltype(e) is 2943 // defined as T&, otherwise decltype(e) is defined as T. 2944 if (e->isLValue()) 2945 T = Context.getLValueReferenceType(T); 2946 2947 return T; 2948} 2949 2950/// getDecltypeType - Unlike many "get<Type>" functions, we don't unique 2951/// DecltypeType AST's. The only motivation to unique these nodes would be 2952/// memory savings. Since decltype(t) is fairly uncommon, space shouldn't be 2953/// an issue. This doesn't effect the type checker, since it operates 2954/// on canonical types (which are always unique). 2955QualType ASTContext::getDecltypeType(Expr *e) const { 2956 DecltypeType *dt; 2957 2958 // C++0x [temp.type]p2: 2959 // If an expression e involves a template parameter, decltype(e) denotes a 2960 // unique dependent type. Two such decltype-specifiers refer to the same 2961 // type only if their expressions are equivalent (14.5.6.1). 2962 if (e->isInstantiationDependent()) { 2963 llvm::FoldingSetNodeID ID; 2964 DependentDecltypeType::Profile(ID, *this, e); 2965 2966 void *InsertPos = 0; 2967 DependentDecltypeType *Canon 2968 = DependentDecltypeTypes.FindNodeOrInsertPos(ID, InsertPos); 2969 if (Canon) { 2970 // We already have a "canonical" version of an equivalent, dependent 2971 // decltype type. Use that as our canonical type. 2972 dt = new (*this, TypeAlignment) DecltypeType(e, DependentTy, 2973 QualType((DecltypeType*)Canon, 0)); 2974 } else { 2975 // Build a new, canonical typeof(expr) type. 2976 Canon = new (*this, TypeAlignment) DependentDecltypeType(*this, e); 2977 DependentDecltypeTypes.InsertNode(Canon, InsertPos); 2978 dt = Canon; 2979 } 2980 } else { 2981 QualType T = getDecltypeForExpr(e, *this); 2982 dt = new (*this, TypeAlignment) DecltypeType(e, T, getCanonicalType(T)); 2983 } 2984 Types.push_back(dt); 2985 return QualType(dt, 0); 2986} 2987 2988/// getUnaryTransformationType - We don't unique these, since the memory 2989/// savings are minimal and these are rare. 2990QualType ASTContext::getUnaryTransformType(QualType BaseType, 2991 QualType UnderlyingType, 2992 UnaryTransformType::UTTKind Kind) 2993 const { 2994 UnaryTransformType *Ty = 2995 new (*this, TypeAlignment) UnaryTransformType (BaseType, UnderlyingType, 2996 Kind, 2997 UnderlyingType->isDependentType() ? 2998 QualType() : UnderlyingType); 2999 Types.push_back(Ty); 3000 return QualType(Ty, 0); 3001} 3002 3003/// getAutoType - We only unique auto types after they've been deduced. 3004QualType ASTContext::getAutoType(QualType DeducedType) const { 3005 void *InsertPos = 0; 3006 if (!DeducedType.isNull()) { 3007 // Look in the folding set for an existing type. 3008 llvm::FoldingSetNodeID ID; 3009 AutoType::Profile(ID, DeducedType); 3010 if (AutoType *AT = AutoTypes.FindNodeOrInsertPos(ID, InsertPos)) 3011 return QualType(AT, 0); 3012 } 3013 3014 AutoType *AT = new (*this, TypeAlignment) AutoType(DeducedType); 3015 Types.push_back(AT); 3016 if (InsertPos) 3017 AutoTypes.InsertNode(AT, InsertPos); 3018 return QualType(AT, 0); 3019} 3020 3021/// getAtomicType - Return the uniqued reference to the atomic type for 3022/// the given value type. 3023QualType ASTContext::getAtomicType(QualType T) const { 3024 // Unique pointers, to guarantee there is only one pointer of a particular 3025 // structure. 3026 llvm::FoldingSetNodeID ID; 3027 AtomicType::Profile(ID, T); 3028 3029 void *InsertPos = 0; 3030 if (AtomicType *AT = AtomicTypes.FindNodeOrInsertPos(ID, InsertPos)) 3031 return QualType(AT, 0); 3032 3033 // If the atomic value type isn't canonical, this won't be a canonical type 3034 // either, so fill in the canonical type field. 3035 QualType Canonical; 3036 if (!T.isCanonical()) { 3037 Canonical = getAtomicType(getCanonicalType(T)); 3038 3039 // Get the new insert position for the node we care about. 3040 AtomicType *NewIP = AtomicTypes.FindNodeOrInsertPos(ID, InsertPos); 3041 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 3042 } 3043 AtomicType *New = new (*this, TypeAlignment) AtomicType(T, Canonical); 3044 Types.push_back(New); 3045 AtomicTypes.InsertNode(New, InsertPos); 3046 return QualType(New, 0); 3047} 3048 3049/// getAutoDeductType - Get type pattern for deducing against 'auto'. 3050QualType ASTContext::getAutoDeductType() const { 3051 if (AutoDeductTy.isNull()) 3052 AutoDeductTy = getAutoType(QualType()); 3053 assert(!AutoDeductTy.isNull() && "can't build 'auto' pattern"); 3054 return AutoDeductTy; 3055} 3056 3057/// getAutoRRefDeductType - Get type pattern for deducing against 'auto &&'. 3058QualType ASTContext::getAutoRRefDeductType() const { 3059 if (AutoRRefDeductTy.isNull()) 3060 AutoRRefDeductTy = getRValueReferenceType(getAutoDeductType()); 3061 assert(!AutoRRefDeductTy.isNull() && "can't build 'auto &&' pattern"); 3062 return AutoRRefDeductTy; 3063} 3064 3065/// getTagDeclType - Return the unique reference to the type for the 3066/// specified TagDecl (struct/union/class/enum) decl. 3067QualType ASTContext::getTagDeclType(const TagDecl *Decl) const { 3068 assert (Decl); 3069 // FIXME: What is the design on getTagDeclType when it requires casting 3070 // away const? mutable? 3071 return getTypeDeclType(const_cast<TagDecl*>(Decl)); 3072} 3073 3074/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result 3075/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and 3076/// needs to agree with the definition in <stddef.h>. 3077CanQualType ASTContext::getSizeType() const { 3078 return getFromTargetType(Target->getSizeType()); 3079} 3080 3081/// getIntMaxType - Return the unique type for "intmax_t" (C99 7.18.1.5). 3082CanQualType ASTContext::getIntMaxType() const { 3083 return getFromTargetType(Target->getIntMaxType()); 3084} 3085 3086/// getUIntMaxType - Return the unique type for "uintmax_t" (C99 7.18.1.5). 3087CanQualType ASTContext::getUIntMaxType() const { 3088 return getFromTargetType(Target->getUIntMaxType()); 3089} 3090 3091/// getSignedWCharType - Return the type of "signed wchar_t". 3092/// Used when in C++, as a GCC extension. 3093QualType ASTContext::getSignedWCharType() const { 3094 // FIXME: derive from "Target" ? 3095 return WCharTy; 3096} 3097 3098/// getUnsignedWCharType - Return the type of "unsigned wchar_t". 3099/// Used when in C++, as a GCC extension. 3100QualType ASTContext::getUnsignedWCharType() const { 3101 // FIXME: derive from "Target" ? 3102 return UnsignedIntTy; 3103} 3104 3105/// getPointerDiffType - Return the unique type for "ptrdiff_t" (C99 7.17) 3106/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 3107QualType ASTContext::getPointerDiffType() const { 3108 return getFromTargetType(Target->getPtrDiffType(0)); 3109} 3110 3111//===----------------------------------------------------------------------===// 3112// Type Operators 3113//===----------------------------------------------------------------------===// 3114 3115CanQualType ASTContext::getCanonicalParamType(QualType T) const { 3116 // Push qualifiers into arrays, and then discard any remaining 3117 // qualifiers. 3118 T = getCanonicalType(T); 3119 T = getVariableArrayDecayedType(T); 3120 const Type *Ty = T.getTypePtr(); 3121 QualType Result; 3122 if (isa<ArrayType>(Ty)) { 3123 Result = getArrayDecayedType(QualType(Ty,0)); 3124 } else if (isa<FunctionType>(Ty)) { 3125 Result = getPointerType(QualType(Ty, 0)); 3126 } else { 3127 Result = QualType(Ty, 0); 3128 } 3129 3130 return CanQualType::CreateUnsafe(Result); 3131} 3132 3133QualType ASTContext::getUnqualifiedArrayType(QualType type, 3134 Qualifiers &quals) { 3135 SplitQualType splitType = type.getSplitUnqualifiedType(); 3136 3137 // FIXME: getSplitUnqualifiedType() actually walks all the way to 3138 // the unqualified desugared type and then drops it on the floor. 3139 // We then have to strip that sugar back off with 3140 // getUnqualifiedDesugaredType(), which is silly. 3141 const ArrayType *AT = 3142 dyn_cast<ArrayType>(splitType.first->getUnqualifiedDesugaredType()); 3143 3144 // If we don't have an array, just use the results in splitType. 3145 if (!AT) { 3146 quals = splitType.second; 3147 return QualType(splitType.first, 0); 3148 } 3149 3150 // Otherwise, recurse on the array's element type. 3151 QualType elementType = AT->getElementType(); 3152 QualType unqualElementType = getUnqualifiedArrayType(elementType, quals); 3153 3154 // If that didn't change the element type, AT has no qualifiers, so we 3155 // can just use the results in splitType. 3156 if (elementType == unqualElementType) { 3157 assert(quals.empty()); // from the recursive call 3158 quals = splitType.second; 3159 return QualType(splitType.first, 0); 3160 } 3161 3162 // Otherwise, add in the qualifiers from the outermost type, then 3163 // build the type back up. 3164 quals.addConsistentQualifiers(splitType.second); 3165 3166 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) { 3167 return getConstantArrayType(unqualElementType, CAT->getSize(), 3168 CAT->getSizeModifier(), 0); 3169 } 3170 3171 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) { 3172 return getIncompleteArrayType(unqualElementType, IAT->getSizeModifier(), 0); 3173 } 3174 3175 if (const VariableArrayType *VAT = dyn_cast<VariableArrayType>(AT)) { 3176 return getVariableArrayType(unqualElementType, 3177 VAT->getSizeExpr(), 3178 VAT->getSizeModifier(), 3179 VAT->getIndexTypeCVRQualifiers(), 3180 VAT->getBracketsRange()); 3181 } 3182 3183 const DependentSizedArrayType *DSAT = cast<DependentSizedArrayType>(AT); 3184 return getDependentSizedArrayType(unqualElementType, DSAT->getSizeExpr(), 3185 DSAT->getSizeModifier(), 0, 3186 SourceRange()); 3187} 3188 3189/// UnwrapSimilarPointerTypes - If T1 and T2 are pointer types that 3190/// may be similar (C++ 4.4), replaces T1 and T2 with the type that 3191/// they point to and return true. If T1 and T2 aren't pointer types 3192/// or pointer-to-member types, or if they are not similar at this 3193/// level, returns false and leaves T1 and T2 unchanged. Top-level 3194/// qualifiers on T1 and T2 are ignored. This function will typically 3195/// be called in a loop that successively "unwraps" pointer and 3196/// pointer-to-member types to compare them at each level. 3197bool ASTContext::UnwrapSimilarPointerTypes(QualType &T1, QualType &T2) { 3198 const PointerType *T1PtrType = T1->getAs<PointerType>(), 3199 *T2PtrType = T2->getAs<PointerType>(); 3200 if (T1PtrType && T2PtrType) { 3201 T1 = T1PtrType->getPointeeType(); 3202 T2 = T2PtrType->getPointeeType(); 3203 return true; 3204 } 3205 3206 const MemberPointerType *T1MPType = T1->getAs<MemberPointerType>(), 3207 *T2MPType = T2->getAs<MemberPointerType>(); 3208 if (T1MPType && T2MPType && 3209 hasSameUnqualifiedType(QualType(T1MPType->getClass(), 0), 3210 QualType(T2MPType->getClass(), 0))) { 3211 T1 = T1MPType->getPointeeType(); 3212 T2 = T2MPType->getPointeeType(); 3213 return true; 3214 } 3215 3216 if (getLangOptions().ObjC1) { 3217 const ObjCObjectPointerType *T1OPType = T1->getAs<ObjCObjectPointerType>(), 3218 *T2OPType = T2->getAs<ObjCObjectPointerType>(); 3219 if (T1OPType && T2OPType) { 3220 T1 = T1OPType->getPointeeType(); 3221 T2 = T2OPType->getPointeeType(); 3222 return true; 3223 } 3224 } 3225 3226 // FIXME: Block pointers, too? 3227 3228 return false; 3229} 3230 3231DeclarationNameInfo 3232ASTContext::getNameForTemplate(TemplateName Name, 3233 SourceLocation NameLoc) const { 3234 switch (Name.getKind()) { 3235 case TemplateName::QualifiedTemplate: 3236 case TemplateName::Template: 3237 // DNInfo work in progress: CHECKME: what about DNLoc? 3238 return DeclarationNameInfo(Name.getAsTemplateDecl()->getDeclName(), 3239 NameLoc); 3240 3241 case TemplateName::OverloadedTemplate: { 3242 OverloadedTemplateStorage *Storage = Name.getAsOverloadedTemplate(); 3243 // DNInfo work in progress: CHECKME: what about DNLoc? 3244 return DeclarationNameInfo((*Storage->begin())->getDeclName(), NameLoc); 3245 } 3246 3247 case TemplateName::DependentTemplate: { 3248 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 3249 DeclarationName DName; 3250 if (DTN->isIdentifier()) { 3251 DName = DeclarationNames.getIdentifier(DTN->getIdentifier()); 3252 return DeclarationNameInfo(DName, NameLoc); 3253 } else { 3254 DName = DeclarationNames.getCXXOperatorName(DTN->getOperator()); 3255 // DNInfo work in progress: FIXME: source locations? 3256 DeclarationNameLoc DNLoc; 3257 DNLoc.CXXOperatorName.BeginOpNameLoc = SourceLocation().getRawEncoding(); 3258 DNLoc.CXXOperatorName.EndOpNameLoc = SourceLocation().getRawEncoding(); 3259 return DeclarationNameInfo(DName, NameLoc, DNLoc); 3260 } 3261 } 3262 3263 case TemplateName::SubstTemplateTemplateParm: { 3264 SubstTemplateTemplateParmStorage *subst 3265 = Name.getAsSubstTemplateTemplateParm(); 3266 return DeclarationNameInfo(subst->getParameter()->getDeclName(), 3267 NameLoc); 3268 } 3269 3270 case TemplateName::SubstTemplateTemplateParmPack: { 3271 SubstTemplateTemplateParmPackStorage *subst 3272 = Name.getAsSubstTemplateTemplateParmPack(); 3273 return DeclarationNameInfo(subst->getParameterPack()->getDeclName(), 3274 NameLoc); 3275 } 3276 } 3277 3278 llvm_unreachable("bad template name kind!"); 3279} 3280 3281TemplateName ASTContext::getCanonicalTemplateName(TemplateName Name) const { 3282 switch (Name.getKind()) { 3283 case TemplateName::QualifiedTemplate: 3284 case TemplateName::Template: { 3285 TemplateDecl *Template = Name.getAsTemplateDecl(); 3286 if (TemplateTemplateParmDecl *TTP 3287 = dyn_cast<TemplateTemplateParmDecl>(Template)) 3288 Template = getCanonicalTemplateTemplateParmDecl(TTP); 3289 3290 // The canonical template name is the canonical template declaration. 3291 return TemplateName(cast<TemplateDecl>(Template->getCanonicalDecl())); 3292 } 3293 3294 case TemplateName::OverloadedTemplate: 3295 llvm_unreachable("cannot canonicalize overloaded template"); 3296 3297 case TemplateName::DependentTemplate: { 3298 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 3299 assert(DTN && "Non-dependent template names must refer to template decls."); 3300 return DTN->CanonicalTemplateName; 3301 } 3302 3303 case TemplateName::SubstTemplateTemplateParm: { 3304 SubstTemplateTemplateParmStorage *subst 3305 = Name.getAsSubstTemplateTemplateParm(); 3306 return getCanonicalTemplateName(subst->getReplacement()); 3307 } 3308 3309 case TemplateName::SubstTemplateTemplateParmPack: { 3310 SubstTemplateTemplateParmPackStorage *subst 3311 = Name.getAsSubstTemplateTemplateParmPack(); 3312 TemplateTemplateParmDecl *canonParameter 3313 = getCanonicalTemplateTemplateParmDecl(subst->getParameterPack()); 3314 TemplateArgument canonArgPack 3315 = getCanonicalTemplateArgument(subst->getArgumentPack()); 3316 return getSubstTemplateTemplateParmPack(canonParameter, canonArgPack); 3317 } 3318 } 3319 3320 llvm_unreachable("bad template name!"); 3321} 3322 3323bool ASTContext::hasSameTemplateName(TemplateName X, TemplateName Y) { 3324 X = getCanonicalTemplateName(X); 3325 Y = getCanonicalTemplateName(Y); 3326 return X.getAsVoidPointer() == Y.getAsVoidPointer(); 3327} 3328 3329TemplateArgument 3330ASTContext::getCanonicalTemplateArgument(const TemplateArgument &Arg) const { 3331 switch (Arg.getKind()) { 3332 case TemplateArgument::Null: 3333 return Arg; 3334 3335 case TemplateArgument::Expression: 3336 return Arg; 3337 3338 case TemplateArgument::Declaration: 3339 return TemplateArgument(Arg.getAsDecl()->getCanonicalDecl()); 3340 3341 case TemplateArgument::Template: 3342 return TemplateArgument(getCanonicalTemplateName(Arg.getAsTemplate())); 3343 3344 case TemplateArgument::TemplateExpansion: 3345 return TemplateArgument(getCanonicalTemplateName( 3346 Arg.getAsTemplateOrTemplatePattern()), 3347 Arg.getNumTemplateExpansions()); 3348 3349 case TemplateArgument::Integral: 3350 return TemplateArgument(*Arg.getAsIntegral(), 3351 getCanonicalType(Arg.getIntegralType())); 3352 3353 case TemplateArgument::Type: 3354 return TemplateArgument(getCanonicalType(Arg.getAsType())); 3355 3356 case TemplateArgument::Pack: { 3357 if (Arg.pack_size() == 0) 3358 return Arg; 3359 3360 TemplateArgument *CanonArgs 3361 = new (*this) TemplateArgument[Arg.pack_size()]; 3362 unsigned Idx = 0; 3363 for (TemplateArgument::pack_iterator A = Arg.pack_begin(), 3364 AEnd = Arg.pack_end(); 3365 A != AEnd; (void)++A, ++Idx) 3366 CanonArgs[Idx] = getCanonicalTemplateArgument(*A); 3367 3368 return TemplateArgument(CanonArgs, Arg.pack_size()); 3369 } 3370 } 3371 3372 // Silence GCC warning 3373 llvm_unreachable("Unhandled template argument kind"); 3374} 3375 3376NestedNameSpecifier * 3377ASTContext::getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) const { 3378 if (!NNS) 3379 return 0; 3380 3381 switch (NNS->getKind()) { 3382 case NestedNameSpecifier::Identifier: 3383 // Canonicalize the prefix but keep the identifier the same. 3384 return NestedNameSpecifier::Create(*this, 3385 getCanonicalNestedNameSpecifier(NNS->getPrefix()), 3386 NNS->getAsIdentifier()); 3387 3388 case NestedNameSpecifier::Namespace: 3389 // A namespace is canonical; build a nested-name-specifier with 3390 // this namespace and no prefix. 3391 return NestedNameSpecifier::Create(*this, 0, 3392 NNS->getAsNamespace()->getOriginalNamespace()); 3393 3394 case NestedNameSpecifier::NamespaceAlias: 3395 // A namespace is canonical; build a nested-name-specifier with 3396 // this namespace and no prefix. 3397 return NestedNameSpecifier::Create(*this, 0, 3398 NNS->getAsNamespaceAlias()->getNamespace() 3399 ->getOriginalNamespace()); 3400 3401 case NestedNameSpecifier::TypeSpec: 3402 case NestedNameSpecifier::TypeSpecWithTemplate: { 3403 QualType T = getCanonicalType(QualType(NNS->getAsType(), 0)); 3404 3405 // If we have some kind of dependent-named type (e.g., "typename T::type"), 3406 // break it apart into its prefix and identifier, then reconsititute those 3407 // as the canonical nested-name-specifier. This is required to canonicalize 3408 // a dependent nested-name-specifier involving typedefs of dependent-name 3409 // types, e.g., 3410 // typedef typename T::type T1; 3411 // typedef typename T1::type T2; 3412 if (const DependentNameType *DNT = T->getAs<DependentNameType>()) { 3413 NestedNameSpecifier *Prefix 3414 = getCanonicalNestedNameSpecifier(DNT->getQualifier()); 3415 return NestedNameSpecifier::Create(*this, Prefix, 3416 const_cast<IdentifierInfo *>(DNT->getIdentifier())); 3417 } 3418 3419 // Do the same thing as above, but with dependent-named specializations. 3420 if (const DependentTemplateSpecializationType *DTST 3421 = T->getAs<DependentTemplateSpecializationType>()) { 3422 NestedNameSpecifier *Prefix 3423 = getCanonicalNestedNameSpecifier(DTST->getQualifier()); 3424 3425 T = getDependentTemplateSpecializationType(DTST->getKeyword(), 3426 Prefix, DTST->getIdentifier(), 3427 DTST->getNumArgs(), 3428 DTST->getArgs()); 3429 T = getCanonicalType(T); 3430 } 3431 3432 return NestedNameSpecifier::Create(*this, 0, false, 3433 const_cast<Type*>(T.getTypePtr())); 3434 } 3435 3436 case NestedNameSpecifier::Global: 3437 // The global specifier is canonical and unique. 3438 return NNS; 3439 } 3440 3441 llvm_unreachable("Invalid NestedNameSpecifier::Kind!"); 3442} 3443 3444 3445const ArrayType *ASTContext::getAsArrayType(QualType T) const { 3446 // Handle the non-qualified case efficiently. 3447 if (!T.hasLocalQualifiers()) { 3448 // Handle the common positive case fast. 3449 if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 3450 return AT; 3451 } 3452 3453 // Handle the common negative case fast. 3454 if (!isa<ArrayType>(T.getCanonicalType())) 3455 return 0; 3456 3457 // Apply any qualifiers from the array type to the element type. This 3458 // implements C99 6.7.3p8: "If the specification of an array type includes 3459 // any type qualifiers, the element type is so qualified, not the array type." 3460 3461 // If we get here, we either have type qualifiers on the type, or we have 3462 // sugar such as a typedef in the way. If we have type qualifiers on the type 3463 // we must propagate them down into the element type. 3464 3465 SplitQualType split = T.getSplitDesugaredType(); 3466 Qualifiers qs = split.second; 3467 3468 // If we have a simple case, just return now. 3469 const ArrayType *ATy = dyn_cast<ArrayType>(split.first); 3470 if (ATy == 0 || qs.empty()) 3471 return ATy; 3472 3473 // Otherwise, we have an array and we have qualifiers on it. Push the 3474 // qualifiers into the array element type and return a new array type. 3475 QualType NewEltTy = getQualifiedType(ATy->getElementType(), qs); 3476 3477 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy)) 3478 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(), 3479 CAT->getSizeModifier(), 3480 CAT->getIndexTypeCVRQualifiers())); 3481 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy)) 3482 return cast<ArrayType>(getIncompleteArrayType(NewEltTy, 3483 IAT->getSizeModifier(), 3484 IAT->getIndexTypeCVRQualifiers())); 3485 3486 if (const DependentSizedArrayType *DSAT 3487 = dyn_cast<DependentSizedArrayType>(ATy)) 3488 return cast<ArrayType>( 3489 getDependentSizedArrayType(NewEltTy, 3490 DSAT->getSizeExpr(), 3491 DSAT->getSizeModifier(), 3492 DSAT->getIndexTypeCVRQualifiers(), 3493 DSAT->getBracketsRange())); 3494 3495 const VariableArrayType *VAT = cast<VariableArrayType>(ATy); 3496 return cast<ArrayType>(getVariableArrayType(NewEltTy, 3497 VAT->getSizeExpr(), 3498 VAT->getSizeModifier(), 3499 VAT->getIndexTypeCVRQualifiers(), 3500 VAT->getBracketsRange())); 3501} 3502 3503QualType ASTContext::getAdjustedParameterType(QualType T) { 3504 // C99 6.7.5.3p7: 3505 // A declaration of a parameter as "array of type" shall be 3506 // adjusted to "qualified pointer to type", where the type 3507 // qualifiers (if any) are those specified within the [ and ] of 3508 // the array type derivation. 3509 if (T->isArrayType()) 3510 return getArrayDecayedType(T); 3511 3512 // C99 6.7.5.3p8: 3513 // A declaration of a parameter as "function returning type" 3514 // shall be adjusted to "pointer to function returning type", as 3515 // in 6.3.2.1. 3516 if (T->isFunctionType()) 3517 return getPointerType(T); 3518 3519 return T; 3520} 3521 3522QualType ASTContext::getSignatureParameterType(QualType T) { 3523 T = getVariableArrayDecayedType(T); 3524 T = getAdjustedParameterType(T); 3525 return T.getUnqualifiedType(); 3526} 3527 3528/// getArrayDecayedType - Return the properly qualified result of decaying the 3529/// specified array type to a pointer. This operation is non-trivial when 3530/// handling typedefs etc. The canonical type of "T" must be an array type, 3531/// this returns a pointer to a properly qualified element of the array. 3532/// 3533/// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 3534QualType ASTContext::getArrayDecayedType(QualType Ty) const { 3535 // Get the element type with 'getAsArrayType' so that we don't lose any 3536 // typedefs in the element type of the array. This also handles propagation 3537 // of type qualifiers from the array type into the element type if present 3538 // (C99 6.7.3p8). 3539 const ArrayType *PrettyArrayType = getAsArrayType(Ty); 3540 assert(PrettyArrayType && "Not an array type!"); 3541 3542 QualType PtrTy = getPointerType(PrettyArrayType->getElementType()); 3543 3544 // int x[restrict 4] -> int *restrict 3545 return getQualifiedType(PtrTy, PrettyArrayType->getIndexTypeQualifiers()); 3546} 3547 3548QualType ASTContext::getBaseElementType(const ArrayType *array) const { 3549 return getBaseElementType(array->getElementType()); 3550} 3551 3552QualType ASTContext::getBaseElementType(QualType type) const { 3553 Qualifiers qs; 3554 while (true) { 3555 SplitQualType split = type.getSplitDesugaredType(); 3556 const ArrayType *array = split.first->getAsArrayTypeUnsafe(); 3557 if (!array) break; 3558 3559 type = array->getElementType(); 3560 qs.addConsistentQualifiers(split.second); 3561 } 3562 3563 return getQualifiedType(type, qs); 3564} 3565 3566/// getConstantArrayElementCount - Returns number of constant array elements. 3567uint64_t 3568ASTContext::getConstantArrayElementCount(const ConstantArrayType *CA) const { 3569 uint64_t ElementCount = 1; 3570 do { 3571 ElementCount *= CA->getSize().getZExtValue(); 3572 CA = dyn_cast<ConstantArrayType>(CA->getElementType()); 3573 } while (CA); 3574 return ElementCount; 3575} 3576 3577/// getFloatingRank - Return a relative rank for floating point types. 3578/// This routine will assert if passed a built-in type that isn't a float. 3579static FloatingRank getFloatingRank(QualType T) { 3580 if (const ComplexType *CT = T->getAs<ComplexType>()) 3581 return getFloatingRank(CT->getElementType()); 3582 3583 assert(T->getAs<BuiltinType>() && "getFloatingRank(): not a floating type"); 3584 switch (T->getAs<BuiltinType>()->getKind()) { 3585 default: llvm_unreachable("getFloatingRank(): not a floating type"); 3586 case BuiltinType::Half: return HalfRank; 3587 case BuiltinType::Float: return FloatRank; 3588 case BuiltinType::Double: return DoubleRank; 3589 case BuiltinType::LongDouble: return LongDoubleRank; 3590 } 3591} 3592 3593/// getFloatingTypeOfSizeWithinDomain - Returns a real floating 3594/// point or a complex type (based on typeDomain/typeSize). 3595/// 'typeDomain' is a real floating point or complex type. 3596/// 'typeSize' is a real floating point or complex type. 3597QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size, 3598 QualType Domain) const { 3599 FloatingRank EltRank = getFloatingRank(Size); 3600 if (Domain->isComplexType()) { 3601 switch (EltRank) { 3602 case HalfRank: llvm_unreachable("Complex half is not supported"); 3603 case FloatRank: return FloatComplexTy; 3604 case DoubleRank: return DoubleComplexTy; 3605 case LongDoubleRank: return LongDoubleComplexTy; 3606 } 3607 } 3608 3609 assert(Domain->isRealFloatingType() && "Unknown domain!"); 3610 switch (EltRank) { 3611 case HalfRank: llvm_unreachable("Half ranks are not valid here"); 3612 case FloatRank: return FloatTy; 3613 case DoubleRank: return DoubleTy; 3614 case LongDoubleRank: return LongDoubleTy; 3615 } 3616 llvm_unreachable("getFloatingRank(): illegal value for rank"); 3617} 3618 3619/// getFloatingTypeOrder - Compare the rank of the two specified floating 3620/// point types, ignoring the domain of the type (i.e. 'double' == 3621/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 3622/// LHS < RHS, return -1. 3623int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) const { 3624 FloatingRank LHSR = getFloatingRank(LHS); 3625 FloatingRank RHSR = getFloatingRank(RHS); 3626 3627 if (LHSR == RHSR) 3628 return 0; 3629 if (LHSR > RHSR) 3630 return 1; 3631 return -1; 3632} 3633 3634/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This 3635/// routine will assert if passed a built-in type that isn't an integer or enum, 3636/// or if it is not canonicalized. 3637unsigned ASTContext::getIntegerRank(const Type *T) const { 3638 assert(T->isCanonicalUnqualified() && "T should be canonicalized"); 3639 3640 switch (cast<BuiltinType>(T)->getKind()) { 3641 default: llvm_unreachable("getIntegerRank(): not a built-in integer"); 3642 case BuiltinType::Bool: 3643 return 1 + (getIntWidth(BoolTy) << 3); 3644 case BuiltinType::Char_S: 3645 case BuiltinType::Char_U: 3646 case BuiltinType::SChar: 3647 case BuiltinType::UChar: 3648 return 2 + (getIntWidth(CharTy) << 3); 3649 case BuiltinType::Short: 3650 case BuiltinType::UShort: 3651 return 3 + (getIntWidth(ShortTy) << 3); 3652 case BuiltinType::Int: 3653 case BuiltinType::UInt: 3654 return 4 + (getIntWidth(IntTy) << 3); 3655 case BuiltinType::Long: 3656 case BuiltinType::ULong: 3657 return 5 + (getIntWidth(LongTy) << 3); 3658 case BuiltinType::LongLong: 3659 case BuiltinType::ULongLong: 3660 return 6 + (getIntWidth(LongLongTy) << 3); 3661 case BuiltinType::Int128: 3662 case BuiltinType::UInt128: 3663 return 7 + (getIntWidth(Int128Ty) << 3); 3664 } 3665} 3666 3667/// \brief Whether this is a promotable bitfield reference according 3668/// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 3669/// 3670/// \returns the type this bit-field will promote to, or NULL if no 3671/// promotion occurs. 3672QualType ASTContext::isPromotableBitField(Expr *E) const { 3673 if (E->isTypeDependent() || E->isValueDependent()) 3674 return QualType(); 3675 3676 FieldDecl *Field = E->getBitField(); 3677 if (!Field) 3678 return QualType(); 3679 3680 QualType FT = Field->getType(); 3681 3682 uint64_t BitWidth = Field->getBitWidthValue(*this); 3683 uint64_t IntSize = getTypeSize(IntTy); 3684 // GCC extension compatibility: if the bit-field size is less than or equal 3685 // to the size of int, it gets promoted no matter what its type is. 3686 // For instance, unsigned long bf : 4 gets promoted to signed int. 3687 if (BitWidth < IntSize) 3688 return IntTy; 3689 3690 if (BitWidth == IntSize) 3691 return FT->isSignedIntegerType() ? IntTy : UnsignedIntTy; 3692 3693 // Types bigger than int are not subject to promotions, and therefore act 3694 // like the base type. 3695 // FIXME: This doesn't quite match what gcc does, but what gcc does here 3696 // is ridiculous. 3697 return QualType(); 3698} 3699 3700/// getPromotedIntegerType - Returns the type that Promotable will 3701/// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 3702/// integer type. 3703QualType ASTContext::getPromotedIntegerType(QualType Promotable) const { 3704 assert(!Promotable.isNull()); 3705 assert(Promotable->isPromotableIntegerType()); 3706 if (const EnumType *ET = Promotable->getAs<EnumType>()) 3707 return ET->getDecl()->getPromotionType(); 3708 3709 if (const BuiltinType *BT = Promotable->getAs<BuiltinType>()) { 3710 // C++ [conv.prom]: A prvalue of type char16_t, char32_t, or wchar_t 3711 // (3.9.1) can be converted to a prvalue of the first of the following 3712 // types that can represent all the values of its underlying type: 3713 // int, unsigned int, long int, unsigned long int, long long int, or 3714 // unsigned long long int [...] 3715 // FIXME: Is there some better way to compute this? 3716 if (BT->getKind() == BuiltinType::WChar_S || 3717 BT->getKind() == BuiltinType::WChar_U || 3718 BT->getKind() == BuiltinType::Char16 || 3719 BT->getKind() == BuiltinType::Char32) { 3720 bool FromIsSigned = BT->getKind() == BuiltinType::WChar_S; 3721 uint64_t FromSize = getTypeSize(BT); 3722 QualType PromoteTypes[] = { IntTy, UnsignedIntTy, LongTy, UnsignedLongTy, 3723 LongLongTy, UnsignedLongLongTy }; 3724 for (size_t Idx = 0; Idx < llvm::array_lengthof(PromoteTypes); ++Idx) { 3725 uint64_t ToSize = getTypeSize(PromoteTypes[Idx]); 3726 if (FromSize < ToSize || 3727 (FromSize == ToSize && 3728 FromIsSigned == PromoteTypes[Idx]->isSignedIntegerType())) 3729 return PromoteTypes[Idx]; 3730 } 3731 llvm_unreachable("char type should fit into long long"); 3732 } 3733 } 3734 3735 // At this point, we should have a signed or unsigned integer type. 3736 if (Promotable->isSignedIntegerType()) 3737 return IntTy; 3738 uint64_t PromotableSize = getTypeSize(Promotable); 3739 uint64_t IntSize = getTypeSize(IntTy); 3740 assert(Promotable->isUnsignedIntegerType() && PromotableSize <= IntSize); 3741 return (PromotableSize != IntSize) ? IntTy : UnsignedIntTy; 3742} 3743 3744/// \brief Recurses in pointer/array types until it finds an objc retainable 3745/// type and returns its ownership. 3746Qualifiers::ObjCLifetime ASTContext::getInnerObjCOwnership(QualType T) const { 3747 while (!T.isNull()) { 3748 if (T.getObjCLifetime() != Qualifiers::OCL_None) 3749 return T.getObjCLifetime(); 3750 if (T->isArrayType()) 3751 T = getBaseElementType(T); 3752 else if (const PointerType *PT = T->getAs<PointerType>()) 3753 T = PT->getPointeeType(); 3754 else if (const ReferenceType *RT = T->getAs<ReferenceType>()) 3755 T = RT->getPointeeType(); 3756 else 3757 break; 3758 } 3759 3760 return Qualifiers::OCL_None; 3761} 3762 3763/// getIntegerTypeOrder - Returns the highest ranked integer type: 3764/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 3765/// LHS < RHS, return -1. 3766int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) const { 3767 const Type *LHSC = getCanonicalType(LHS).getTypePtr(); 3768 const Type *RHSC = getCanonicalType(RHS).getTypePtr(); 3769 if (LHSC == RHSC) return 0; 3770 3771 bool LHSUnsigned = LHSC->isUnsignedIntegerType(); 3772 bool RHSUnsigned = RHSC->isUnsignedIntegerType(); 3773 3774 unsigned LHSRank = getIntegerRank(LHSC); 3775 unsigned RHSRank = getIntegerRank(RHSC); 3776 3777 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned. 3778 if (LHSRank == RHSRank) return 0; 3779 return LHSRank > RHSRank ? 1 : -1; 3780 } 3781 3782 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa. 3783 if (LHSUnsigned) { 3784 // If the unsigned [LHS] type is larger, return it. 3785 if (LHSRank >= RHSRank) 3786 return 1; 3787 3788 // If the signed type can represent all values of the unsigned type, it 3789 // wins. Because we are dealing with 2's complement and types that are 3790 // powers of two larger than each other, this is always safe. 3791 return -1; 3792 } 3793 3794 // If the unsigned [RHS] type is larger, return it. 3795 if (RHSRank >= LHSRank) 3796 return -1; 3797 3798 // If the signed type can represent all values of the unsigned type, it 3799 // wins. Because we are dealing with 2's complement and types that are 3800 // powers of two larger than each other, this is always safe. 3801 return 1; 3802} 3803 3804static RecordDecl * 3805CreateRecordDecl(const ASTContext &Ctx, RecordDecl::TagKind TK, 3806 DeclContext *DC, IdentifierInfo *Id) { 3807 SourceLocation Loc; 3808 if (Ctx.getLangOptions().CPlusPlus) 3809 return CXXRecordDecl::Create(Ctx, TK, DC, Loc, Loc, Id); 3810 else 3811 return RecordDecl::Create(Ctx, TK, DC, Loc, Loc, Id); 3812} 3813 3814// getCFConstantStringType - Return the type used for constant CFStrings. 3815QualType ASTContext::getCFConstantStringType() const { 3816 if (!CFConstantStringTypeDecl) { 3817 CFConstantStringTypeDecl = 3818 CreateRecordDecl(*this, TTK_Struct, TUDecl, 3819 &Idents.get("NSConstantString")); 3820 CFConstantStringTypeDecl->startDefinition(); 3821 3822 QualType FieldTypes[4]; 3823 3824 // const int *isa; 3825 FieldTypes[0] = getPointerType(IntTy.withConst()); 3826 // int flags; 3827 FieldTypes[1] = IntTy; 3828 // const char *str; 3829 FieldTypes[2] = getPointerType(CharTy.withConst()); 3830 // long length; 3831 FieldTypes[3] = LongTy; 3832 3833 // Create fields 3834 for (unsigned i = 0; i < 4; ++i) { 3835 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl, 3836 SourceLocation(), 3837 SourceLocation(), 0, 3838 FieldTypes[i], /*TInfo=*/0, 3839 /*BitWidth=*/0, 3840 /*Mutable=*/false, 3841 /*HasInit=*/false); 3842 Field->setAccess(AS_public); 3843 CFConstantStringTypeDecl->addDecl(Field); 3844 } 3845 3846 CFConstantStringTypeDecl->completeDefinition(); 3847 } 3848 3849 return getTagDeclType(CFConstantStringTypeDecl); 3850} 3851 3852void ASTContext::setCFConstantStringType(QualType T) { 3853 const RecordType *Rec = T->getAs<RecordType>(); 3854 assert(Rec && "Invalid CFConstantStringType"); 3855 CFConstantStringTypeDecl = Rec->getDecl(); 3856} 3857 3858QualType ASTContext::getBlockDescriptorType() const { 3859 if (BlockDescriptorType) 3860 return getTagDeclType(BlockDescriptorType); 3861 3862 RecordDecl *T; 3863 // FIXME: Needs the FlagAppleBlock bit. 3864 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, 3865 &Idents.get("__block_descriptor")); 3866 T->startDefinition(); 3867 3868 QualType FieldTypes[] = { 3869 UnsignedLongTy, 3870 UnsignedLongTy, 3871 }; 3872 3873 const char *FieldNames[] = { 3874 "reserved", 3875 "Size" 3876 }; 3877 3878 for (size_t i = 0; i < 2; ++i) { 3879 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3880 SourceLocation(), 3881 &Idents.get(FieldNames[i]), 3882 FieldTypes[i], /*TInfo=*/0, 3883 /*BitWidth=*/0, 3884 /*Mutable=*/false, 3885 /*HasInit=*/false); 3886 Field->setAccess(AS_public); 3887 T->addDecl(Field); 3888 } 3889 3890 T->completeDefinition(); 3891 3892 BlockDescriptorType = T; 3893 3894 return getTagDeclType(BlockDescriptorType); 3895} 3896 3897QualType ASTContext::getBlockDescriptorExtendedType() const { 3898 if (BlockDescriptorExtendedType) 3899 return getTagDeclType(BlockDescriptorExtendedType); 3900 3901 RecordDecl *T; 3902 // FIXME: Needs the FlagAppleBlock bit. 3903 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, 3904 &Idents.get("__block_descriptor_withcopydispose")); 3905 T->startDefinition(); 3906 3907 QualType FieldTypes[] = { 3908 UnsignedLongTy, 3909 UnsignedLongTy, 3910 getPointerType(VoidPtrTy), 3911 getPointerType(VoidPtrTy) 3912 }; 3913 3914 const char *FieldNames[] = { 3915 "reserved", 3916 "Size", 3917 "CopyFuncPtr", 3918 "DestroyFuncPtr" 3919 }; 3920 3921 for (size_t i = 0; i < 4; ++i) { 3922 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3923 SourceLocation(), 3924 &Idents.get(FieldNames[i]), 3925 FieldTypes[i], /*TInfo=*/0, 3926 /*BitWidth=*/0, 3927 /*Mutable=*/false, 3928 /*HasInit=*/false); 3929 Field->setAccess(AS_public); 3930 T->addDecl(Field); 3931 } 3932 3933 T->completeDefinition(); 3934 3935 BlockDescriptorExtendedType = T; 3936 3937 return getTagDeclType(BlockDescriptorExtendedType); 3938} 3939 3940bool ASTContext::BlockRequiresCopying(QualType Ty) const { 3941 if (Ty->isObjCRetainableType()) 3942 return true; 3943 if (getLangOptions().CPlusPlus) { 3944 if (const RecordType *RT = Ty->getAs<RecordType>()) { 3945 CXXRecordDecl *RD = cast<CXXRecordDecl>(RT->getDecl()); 3946 return RD->hasConstCopyConstructor(); 3947 3948 } 3949 } 3950 return false; 3951} 3952 3953QualType 3954ASTContext::BuildByRefType(StringRef DeclName, QualType Ty) const { 3955 // type = struct __Block_byref_1_X { 3956 // void *__isa; 3957 // struct __Block_byref_1_X *__forwarding; 3958 // unsigned int __flags; 3959 // unsigned int __size; 3960 // void *__copy_helper; // as needed 3961 // void *__destroy_help // as needed 3962 // int X; 3963 // } * 3964 3965 bool HasCopyAndDispose = BlockRequiresCopying(Ty); 3966 3967 // FIXME: Move up 3968 llvm::SmallString<36> Name; 3969 llvm::raw_svector_ostream(Name) << "__Block_byref_" << 3970 ++UniqueBlockByRefTypeID << '_' << DeclName; 3971 RecordDecl *T; 3972 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, &Idents.get(Name.str())); 3973 T->startDefinition(); 3974 QualType Int32Ty = IntTy; 3975 assert(getIntWidth(IntTy) == 32 && "non-32bit int not supported"); 3976 QualType FieldTypes[] = { 3977 getPointerType(VoidPtrTy), 3978 getPointerType(getTagDeclType(T)), 3979 Int32Ty, 3980 Int32Ty, 3981 getPointerType(VoidPtrTy), 3982 getPointerType(VoidPtrTy), 3983 Ty 3984 }; 3985 3986 StringRef FieldNames[] = { 3987 "__isa", 3988 "__forwarding", 3989 "__flags", 3990 "__size", 3991 "__copy_helper", 3992 "__destroy_helper", 3993 DeclName, 3994 }; 3995 3996 for (size_t i = 0; i < 7; ++i) { 3997 if (!HasCopyAndDispose && i >=4 && i <= 5) 3998 continue; 3999 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 4000 SourceLocation(), 4001 &Idents.get(FieldNames[i]), 4002 FieldTypes[i], /*TInfo=*/0, 4003 /*BitWidth=*/0, /*Mutable=*/false, 4004 /*HasInit=*/false); 4005 Field->setAccess(AS_public); 4006 T->addDecl(Field); 4007 } 4008 4009 T->completeDefinition(); 4010 4011 return getPointerType(getTagDeclType(T)); 4012} 4013 4014TypedefDecl *ASTContext::getObjCInstanceTypeDecl() { 4015 if (!ObjCInstanceTypeDecl) 4016 ObjCInstanceTypeDecl = TypedefDecl::Create(*this, 4017 getTranslationUnitDecl(), 4018 SourceLocation(), 4019 SourceLocation(), 4020 &Idents.get("instancetype"), 4021 getTrivialTypeSourceInfo(getObjCIdType())); 4022 return ObjCInstanceTypeDecl; 4023} 4024 4025// This returns true if a type has been typedefed to BOOL: 4026// typedef <type> BOOL; 4027static bool isTypeTypedefedAsBOOL(QualType T) { 4028 if (const TypedefType *TT = dyn_cast<TypedefType>(T)) 4029 if (IdentifierInfo *II = TT->getDecl()->getIdentifier()) 4030 return II->isStr("BOOL"); 4031 4032 return false; 4033} 4034 4035/// getObjCEncodingTypeSize returns size of type for objective-c encoding 4036/// purpose. 4037CharUnits ASTContext::getObjCEncodingTypeSize(QualType type) const { 4038 if (!type->isIncompleteArrayType() && type->isIncompleteType()) 4039 return CharUnits::Zero(); 4040 4041 CharUnits sz = getTypeSizeInChars(type); 4042 4043 // Make all integer and enum types at least as large as an int 4044 if (sz.isPositive() && type->isIntegralOrEnumerationType()) 4045 sz = std::max(sz, getTypeSizeInChars(IntTy)); 4046 // Treat arrays as pointers, since that's how they're passed in. 4047 else if (type->isArrayType()) 4048 sz = getTypeSizeInChars(VoidPtrTy); 4049 return sz; 4050} 4051 4052static inline 4053std::string charUnitsToString(const CharUnits &CU) { 4054 return llvm::itostr(CU.getQuantity()); 4055} 4056 4057/// getObjCEncodingForBlock - Return the encoded type for this block 4058/// declaration. 4059std::string ASTContext::getObjCEncodingForBlock(const BlockExpr *Expr) const { 4060 std::string S; 4061 4062 const BlockDecl *Decl = Expr->getBlockDecl(); 4063 QualType BlockTy = 4064 Expr->getType()->getAs<BlockPointerType>()->getPointeeType(); 4065 // Encode result type. 4066 getObjCEncodingForType(BlockTy->getAs<FunctionType>()->getResultType(), S); 4067 // Compute size of all parameters. 4068 // Start with computing size of a pointer in number of bytes. 4069 // FIXME: There might(should) be a better way of doing this computation! 4070 SourceLocation Loc; 4071 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 4072 CharUnits ParmOffset = PtrSize; 4073 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), 4074 E = Decl->param_end(); PI != E; ++PI) { 4075 QualType PType = (*PI)->getType(); 4076 CharUnits sz = getObjCEncodingTypeSize(PType); 4077 assert (sz.isPositive() && "BlockExpr - Incomplete param type"); 4078 ParmOffset += sz; 4079 } 4080 // Size of the argument frame 4081 S += charUnitsToString(ParmOffset); 4082 // Block pointer and offset. 4083 S += "@?0"; 4084 4085 // Argument types. 4086 ParmOffset = PtrSize; 4087 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), E = 4088 Decl->param_end(); PI != E; ++PI) { 4089 ParmVarDecl *PVDecl = *PI; 4090 QualType PType = PVDecl->getOriginalType(); 4091 if (const ArrayType *AT = 4092 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 4093 // Use array's original type only if it has known number of 4094 // elements. 4095 if (!isa<ConstantArrayType>(AT)) 4096 PType = PVDecl->getType(); 4097 } else if (PType->isFunctionType()) 4098 PType = PVDecl->getType(); 4099 getObjCEncodingForType(PType, S); 4100 S += charUnitsToString(ParmOffset); 4101 ParmOffset += getObjCEncodingTypeSize(PType); 4102 } 4103 4104 return S; 4105} 4106 4107bool ASTContext::getObjCEncodingForFunctionDecl(const FunctionDecl *Decl, 4108 std::string& S) { 4109 // Encode result type. 4110 getObjCEncodingForType(Decl->getResultType(), S); 4111 CharUnits ParmOffset; 4112 // Compute size of all parameters. 4113 for (FunctionDecl::param_const_iterator PI = Decl->param_begin(), 4114 E = Decl->param_end(); PI != E; ++PI) { 4115 QualType PType = (*PI)->getType(); 4116 CharUnits sz = getObjCEncodingTypeSize(PType); 4117 if (sz.isZero()) 4118 return true; 4119 4120 assert (sz.isPositive() && 4121 "getObjCEncodingForFunctionDecl - Incomplete param type"); 4122 ParmOffset += sz; 4123 } 4124 S += charUnitsToString(ParmOffset); 4125 ParmOffset = CharUnits::Zero(); 4126 4127 // Argument types. 4128 for (FunctionDecl::param_const_iterator PI = Decl->param_begin(), 4129 E = Decl->param_end(); PI != E; ++PI) { 4130 ParmVarDecl *PVDecl = *PI; 4131 QualType PType = PVDecl->getOriginalType(); 4132 if (const ArrayType *AT = 4133 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 4134 // Use array's original type only if it has known number of 4135 // elements. 4136 if (!isa<ConstantArrayType>(AT)) 4137 PType = PVDecl->getType(); 4138 } else if (PType->isFunctionType()) 4139 PType = PVDecl->getType(); 4140 getObjCEncodingForType(PType, S); 4141 S += charUnitsToString(ParmOffset); 4142 ParmOffset += getObjCEncodingTypeSize(PType); 4143 } 4144 4145 return false; 4146} 4147 4148/// getObjCEncodingForMethodParameter - Return the encoded type for a single 4149/// method parameter or return type. If Extended, include class names and 4150/// block object types. 4151void ASTContext::getObjCEncodingForMethodParameter(Decl::ObjCDeclQualifier QT, 4152 QualType T, std::string& S, 4153 bool Extended) const { 4154 // Encode type qualifer, 'in', 'inout', etc. for the parameter. 4155 getObjCEncodingForTypeQualifier(QT, S); 4156 // Encode parameter type. 4157 getObjCEncodingForTypeImpl(T, S, true, true, 0, 4158 true /*OutermostType*/, 4159 false /*EncodingProperty*/, 4160 false /*StructField*/, 4161 Extended /*EncodeBlockParameters*/, 4162 Extended /*EncodeClassNames*/); 4163} 4164 4165/// getObjCEncodingForMethodDecl - Return the encoded type for this method 4166/// declaration. 4167bool ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, 4168 std::string& S, 4169 bool Extended) const { 4170 // FIXME: This is not very efficient. 4171 // Encode return type. 4172 getObjCEncodingForMethodParameter(Decl->getObjCDeclQualifier(), 4173 Decl->getResultType(), S, Extended); 4174 // Compute size of all parameters. 4175 // Start with computing size of a pointer in number of bytes. 4176 // FIXME: There might(should) be a better way of doing this computation! 4177 SourceLocation Loc; 4178 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 4179 // The first two arguments (self and _cmd) are pointers; account for 4180 // their size. 4181 CharUnits ParmOffset = 2 * PtrSize; 4182 for (ObjCMethodDecl::param_const_iterator PI = Decl->param_begin(), 4183 E = Decl->sel_param_end(); PI != E; ++PI) { 4184 QualType PType = (*PI)->getType(); 4185 CharUnits sz = getObjCEncodingTypeSize(PType); 4186 if (sz.isZero()) 4187 return true; 4188 4189 assert (sz.isPositive() && 4190 "getObjCEncodingForMethodDecl - Incomplete param type"); 4191 ParmOffset += sz; 4192 } 4193 S += charUnitsToString(ParmOffset); 4194 S += "@0:"; 4195 S += charUnitsToString(PtrSize); 4196 4197 // Argument types. 4198 ParmOffset = 2 * PtrSize; 4199 for (ObjCMethodDecl::param_const_iterator PI = Decl->param_begin(), 4200 E = Decl->sel_param_end(); PI != E; ++PI) { 4201 const ParmVarDecl *PVDecl = *PI; 4202 QualType PType = PVDecl->getOriginalType(); 4203 if (const ArrayType *AT = 4204 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 4205 // Use array's original type only if it has known number of 4206 // elements. 4207 if (!isa<ConstantArrayType>(AT)) 4208 PType = PVDecl->getType(); 4209 } else if (PType->isFunctionType()) 4210 PType = PVDecl->getType(); 4211 getObjCEncodingForMethodParameter(PVDecl->getObjCDeclQualifier(), 4212 PType, S, Extended); 4213 S += charUnitsToString(ParmOffset); 4214 ParmOffset += getObjCEncodingTypeSize(PType); 4215 } 4216 4217 return false; 4218} 4219 4220/// getObjCEncodingForPropertyDecl - Return the encoded type for this 4221/// property declaration. If non-NULL, Container must be either an 4222/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be 4223/// NULL when getting encodings for protocol properties. 4224/// Property attributes are stored as a comma-delimited C string. The simple 4225/// attributes readonly and bycopy are encoded as single characters. The 4226/// parametrized attributes, getter=name, setter=name, and ivar=name, are 4227/// encoded as single characters, followed by an identifier. Property types 4228/// are also encoded as a parametrized attribute. The characters used to encode 4229/// these attributes are defined by the following enumeration: 4230/// @code 4231/// enum PropertyAttributes { 4232/// kPropertyReadOnly = 'R', // property is read-only. 4233/// kPropertyBycopy = 'C', // property is a copy of the value last assigned 4234/// kPropertyByref = '&', // property is a reference to the value last assigned 4235/// kPropertyDynamic = 'D', // property is dynamic 4236/// kPropertyGetter = 'G', // followed by getter selector name 4237/// kPropertySetter = 'S', // followed by setter selector name 4238/// kPropertyInstanceVariable = 'V' // followed by instance variable name 4239/// kPropertyType = 't' // followed by old-style type encoding. 4240/// kPropertyWeak = 'W' // 'weak' property 4241/// kPropertyStrong = 'P' // property GC'able 4242/// kPropertyNonAtomic = 'N' // property non-atomic 4243/// }; 4244/// @endcode 4245void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 4246 const Decl *Container, 4247 std::string& S) const { 4248 // Collect information from the property implementation decl(s). 4249 bool Dynamic = false; 4250 ObjCPropertyImplDecl *SynthesizePID = 0; 4251 4252 // FIXME: Duplicated code due to poor abstraction. 4253 if (Container) { 4254 if (const ObjCCategoryImplDecl *CID = 4255 dyn_cast<ObjCCategoryImplDecl>(Container)) { 4256 for (ObjCCategoryImplDecl::propimpl_iterator 4257 i = CID->propimpl_begin(), e = CID->propimpl_end(); 4258 i != e; ++i) { 4259 ObjCPropertyImplDecl *PID = *i; 4260 if (PID->getPropertyDecl() == PD) { 4261 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 4262 Dynamic = true; 4263 } else { 4264 SynthesizePID = PID; 4265 } 4266 } 4267 } 4268 } else { 4269 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container); 4270 for (ObjCCategoryImplDecl::propimpl_iterator 4271 i = OID->propimpl_begin(), e = OID->propimpl_end(); 4272 i != e; ++i) { 4273 ObjCPropertyImplDecl *PID = *i; 4274 if (PID->getPropertyDecl() == PD) { 4275 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 4276 Dynamic = true; 4277 } else { 4278 SynthesizePID = PID; 4279 } 4280 } 4281 } 4282 } 4283 } 4284 4285 // FIXME: This is not very efficient. 4286 S = "T"; 4287 4288 // Encode result type. 4289 // GCC has some special rules regarding encoding of properties which 4290 // closely resembles encoding of ivars. 4291 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, 0, 4292 true /* outermost type */, 4293 true /* encoding for property */); 4294 4295 if (PD->isReadOnly()) { 4296 S += ",R"; 4297 } else { 4298 switch (PD->getSetterKind()) { 4299 case ObjCPropertyDecl::Assign: break; 4300 case ObjCPropertyDecl::Copy: S += ",C"; break; 4301 case ObjCPropertyDecl::Retain: S += ",&"; break; 4302 case ObjCPropertyDecl::Weak: S += ",W"; break; 4303 } 4304 } 4305 4306 // It really isn't clear at all what this means, since properties 4307 // are "dynamic by default". 4308 if (Dynamic) 4309 S += ",D"; 4310 4311 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) 4312 S += ",N"; 4313 4314 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) { 4315 S += ",G"; 4316 S += PD->getGetterName().getAsString(); 4317 } 4318 4319 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) { 4320 S += ",S"; 4321 S += PD->getSetterName().getAsString(); 4322 } 4323 4324 if (SynthesizePID) { 4325 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl(); 4326 S += ",V"; 4327 S += OID->getNameAsString(); 4328 } 4329 4330 // FIXME: OBJCGC: weak & strong 4331} 4332 4333/// getLegacyIntegralTypeEncoding - 4334/// Another legacy compatibility encoding: 32-bit longs are encoded as 4335/// 'l' or 'L' , but not always. For typedefs, we need to use 4336/// 'i' or 'I' instead if encoding a struct field, or a pointer! 4337/// 4338void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const { 4339 if (isa<TypedefType>(PointeeTy.getTypePtr())) { 4340 if (const BuiltinType *BT = PointeeTy->getAs<BuiltinType>()) { 4341 if (BT->getKind() == BuiltinType::ULong && getIntWidth(PointeeTy) == 32) 4342 PointeeTy = UnsignedIntTy; 4343 else 4344 if (BT->getKind() == BuiltinType::Long && getIntWidth(PointeeTy) == 32) 4345 PointeeTy = IntTy; 4346 } 4347 } 4348} 4349 4350void ASTContext::getObjCEncodingForType(QualType T, std::string& S, 4351 const FieldDecl *Field) const { 4352 // We follow the behavior of gcc, expanding structures which are 4353 // directly pointed to, and expanding embedded structures. Note that 4354 // these rules are sufficient to prevent recursive encoding of the 4355 // same type. 4356 getObjCEncodingForTypeImpl(T, S, true, true, Field, 4357 true /* outermost type */); 4358} 4359 4360static char ObjCEncodingForPrimitiveKind(const ASTContext *C, QualType T) { 4361 switch (T->getAs<BuiltinType>()->getKind()) { 4362 default: llvm_unreachable("Unhandled builtin type kind"); 4363 case BuiltinType::Void: return 'v'; 4364 case BuiltinType::Bool: return 'B'; 4365 case BuiltinType::Char_U: 4366 case BuiltinType::UChar: return 'C'; 4367 case BuiltinType::UShort: return 'S'; 4368 case BuiltinType::UInt: return 'I'; 4369 case BuiltinType::ULong: 4370 return C->getIntWidth(T) == 32 ? 'L' : 'Q'; 4371 case BuiltinType::UInt128: return 'T'; 4372 case BuiltinType::ULongLong: return 'Q'; 4373 case BuiltinType::Char_S: 4374 case BuiltinType::SChar: return 'c'; 4375 case BuiltinType::Short: return 's'; 4376 case BuiltinType::WChar_S: 4377 case BuiltinType::WChar_U: 4378 case BuiltinType::Int: return 'i'; 4379 case BuiltinType::Long: 4380 return C->getIntWidth(T) == 32 ? 'l' : 'q'; 4381 case BuiltinType::LongLong: return 'q'; 4382 case BuiltinType::Int128: return 't'; 4383 case BuiltinType::Float: return 'f'; 4384 case BuiltinType::Double: return 'd'; 4385 case BuiltinType::LongDouble: return 'D'; 4386 } 4387} 4388 4389static char ObjCEncodingForEnumType(const ASTContext *C, const EnumType *ET) { 4390 EnumDecl *Enum = ET->getDecl(); 4391 4392 // The encoding of an non-fixed enum type is always 'i', regardless of size. 4393 if (!Enum->isFixed()) 4394 return 'i'; 4395 4396 // The encoding of a fixed enum type matches its fixed underlying type. 4397 return ObjCEncodingForPrimitiveKind(C, Enum->getIntegerType()); 4398} 4399 4400static void EncodeBitField(const ASTContext *Ctx, std::string& S, 4401 QualType T, const FieldDecl *FD) { 4402 assert(FD->isBitField() && "not a bitfield - getObjCEncodingForTypeImpl"); 4403 S += 'b'; 4404 // The NeXT runtime encodes bit fields as b followed by the number of bits. 4405 // The GNU runtime requires more information; bitfields are encoded as b, 4406 // then the offset (in bits) of the first element, then the type of the 4407 // bitfield, then the size in bits. For example, in this structure: 4408 // 4409 // struct 4410 // { 4411 // int integer; 4412 // int flags:2; 4413 // }; 4414 // On a 32-bit system, the encoding for flags would be b2 for the NeXT 4415 // runtime, but b32i2 for the GNU runtime. The reason for this extra 4416 // information is not especially sensible, but we're stuck with it for 4417 // compatibility with GCC, although providing it breaks anything that 4418 // actually uses runtime introspection and wants to work on both runtimes... 4419 if (!Ctx->getLangOptions().NeXTRuntime) { 4420 const RecordDecl *RD = FD->getParent(); 4421 const ASTRecordLayout &RL = Ctx->getASTRecordLayout(RD); 4422 S += llvm::utostr(RL.getFieldOffset(FD->getFieldIndex())); 4423 if (const EnumType *ET = T->getAs<EnumType>()) 4424 S += ObjCEncodingForEnumType(Ctx, ET); 4425 else 4426 S += ObjCEncodingForPrimitiveKind(Ctx, T); 4427 } 4428 S += llvm::utostr(FD->getBitWidthValue(*Ctx)); 4429} 4430 4431// FIXME: Use SmallString for accumulating string. 4432void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S, 4433 bool ExpandPointedToStructures, 4434 bool ExpandStructures, 4435 const FieldDecl *FD, 4436 bool OutermostType, 4437 bool EncodingProperty, 4438 bool StructField, 4439 bool EncodeBlockParameters, 4440 bool EncodeClassNames) const { 4441 if (T->getAs<BuiltinType>()) { 4442 if (FD && FD->isBitField()) 4443 return EncodeBitField(this, S, T, FD); 4444 S += ObjCEncodingForPrimitiveKind(this, T); 4445 return; 4446 } 4447 4448 if (const ComplexType *CT = T->getAs<ComplexType>()) { 4449 S += 'j'; 4450 getObjCEncodingForTypeImpl(CT->getElementType(), S, false, false, 0, false, 4451 false); 4452 return; 4453 } 4454 4455 // encoding for pointer or r3eference types. 4456 QualType PointeeTy; 4457 if (const PointerType *PT = T->getAs<PointerType>()) { 4458 if (PT->isObjCSelType()) { 4459 S += ':'; 4460 return; 4461 } 4462 PointeeTy = PT->getPointeeType(); 4463 } 4464 else if (const ReferenceType *RT = T->getAs<ReferenceType>()) 4465 PointeeTy = RT->getPointeeType(); 4466 if (!PointeeTy.isNull()) { 4467 bool isReadOnly = false; 4468 // For historical/compatibility reasons, the read-only qualifier of the 4469 // pointee gets emitted _before_ the '^'. The read-only qualifier of 4470 // the pointer itself gets ignored, _unless_ we are looking at a typedef! 4471 // Also, do not emit the 'r' for anything but the outermost type! 4472 if (isa<TypedefType>(T.getTypePtr())) { 4473 if (OutermostType && T.isConstQualified()) { 4474 isReadOnly = true; 4475 S += 'r'; 4476 } 4477 } else if (OutermostType) { 4478 QualType P = PointeeTy; 4479 while (P->getAs<PointerType>()) 4480 P = P->getAs<PointerType>()->getPointeeType(); 4481 if (P.isConstQualified()) { 4482 isReadOnly = true; 4483 S += 'r'; 4484 } 4485 } 4486 if (isReadOnly) { 4487 // Another legacy compatibility encoding. Some ObjC qualifier and type 4488 // combinations need to be rearranged. 4489 // Rewrite "in const" from "nr" to "rn" 4490 if (StringRef(S).endswith("nr")) 4491 S.replace(S.end()-2, S.end(), "rn"); 4492 } 4493 4494 if (PointeeTy->isCharType()) { 4495 // char pointer types should be encoded as '*' unless it is a 4496 // type that has been typedef'd to 'BOOL'. 4497 if (!isTypeTypedefedAsBOOL(PointeeTy)) { 4498 S += '*'; 4499 return; 4500 } 4501 } else if (const RecordType *RTy = PointeeTy->getAs<RecordType>()) { 4502 // GCC binary compat: Need to convert "struct objc_class *" to "#". 4503 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_class")) { 4504 S += '#'; 4505 return; 4506 } 4507 // GCC binary compat: Need to convert "struct objc_object *" to "@". 4508 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_object")) { 4509 S += '@'; 4510 return; 4511 } 4512 // fall through... 4513 } 4514 S += '^'; 4515 getLegacyIntegralTypeEncoding(PointeeTy); 4516 4517 getObjCEncodingForTypeImpl(PointeeTy, S, false, ExpandPointedToStructures, 4518 NULL); 4519 return; 4520 } 4521 4522 if (const ArrayType *AT = 4523 // Ignore type qualifiers etc. 4524 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) { 4525 if (isa<IncompleteArrayType>(AT) && !StructField) { 4526 // Incomplete arrays are encoded as a pointer to the array element. 4527 S += '^'; 4528 4529 getObjCEncodingForTypeImpl(AT->getElementType(), S, 4530 false, ExpandStructures, FD); 4531 } else { 4532 S += '['; 4533 4534 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) { 4535 if (getTypeSize(CAT->getElementType()) == 0) 4536 S += '0'; 4537 else 4538 S += llvm::utostr(CAT->getSize().getZExtValue()); 4539 } else { 4540 //Variable length arrays are encoded as a regular array with 0 elements. 4541 assert((isa<VariableArrayType>(AT) || isa<IncompleteArrayType>(AT)) && 4542 "Unknown array type!"); 4543 S += '0'; 4544 } 4545 4546 getObjCEncodingForTypeImpl(AT->getElementType(), S, 4547 false, ExpandStructures, FD); 4548 S += ']'; 4549 } 4550 return; 4551 } 4552 4553 if (T->getAs<FunctionType>()) { 4554 S += '?'; 4555 return; 4556 } 4557 4558 if (const RecordType *RTy = T->getAs<RecordType>()) { 4559 RecordDecl *RDecl = RTy->getDecl(); 4560 S += RDecl->isUnion() ? '(' : '{'; 4561 // Anonymous structures print as '?' 4562 if (const IdentifierInfo *II = RDecl->getIdentifier()) { 4563 S += II->getName(); 4564 if (ClassTemplateSpecializationDecl *Spec 4565 = dyn_cast<ClassTemplateSpecializationDecl>(RDecl)) { 4566 const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs(); 4567 std::string TemplateArgsStr 4568 = TemplateSpecializationType::PrintTemplateArgumentList( 4569 TemplateArgs.data(), 4570 TemplateArgs.size(), 4571 (*this).getPrintingPolicy()); 4572 4573 S += TemplateArgsStr; 4574 } 4575 } else { 4576 S += '?'; 4577 } 4578 if (ExpandStructures) { 4579 S += '='; 4580 if (!RDecl->isUnion()) { 4581 getObjCEncodingForStructureImpl(RDecl, S, FD); 4582 } else { 4583 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 4584 FieldEnd = RDecl->field_end(); 4585 Field != FieldEnd; ++Field) { 4586 if (FD) { 4587 S += '"'; 4588 S += Field->getNameAsString(); 4589 S += '"'; 4590 } 4591 4592 // Special case bit-fields. 4593 if (Field->isBitField()) { 4594 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, 4595 (*Field)); 4596 } else { 4597 QualType qt = Field->getType(); 4598 getLegacyIntegralTypeEncoding(qt); 4599 getObjCEncodingForTypeImpl(qt, S, false, true, 4600 FD, /*OutermostType*/false, 4601 /*EncodingProperty*/false, 4602 /*StructField*/true); 4603 } 4604 } 4605 } 4606 } 4607 S += RDecl->isUnion() ? ')' : '}'; 4608 return; 4609 } 4610 4611 if (const EnumType *ET = T->getAs<EnumType>()) { 4612 if (FD && FD->isBitField()) 4613 EncodeBitField(this, S, T, FD); 4614 else 4615 S += ObjCEncodingForEnumType(this, ET); 4616 return; 4617 } 4618 4619 if (const BlockPointerType *BT = T->getAs<BlockPointerType>()) { 4620 S += "@?"; // Unlike a pointer-to-function, which is "^?". 4621 if (EncodeBlockParameters) { 4622 const FunctionType *FT = BT->getPointeeType()->getAs<FunctionType>(); 4623 4624 S += '<'; 4625 // Block return type 4626 getObjCEncodingForTypeImpl(FT->getResultType(), S, 4627 ExpandPointedToStructures, ExpandStructures, 4628 FD, 4629 false /* OutermostType */, 4630 EncodingProperty, 4631 false /* StructField */, 4632 EncodeBlockParameters, 4633 EncodeClassNames); 4634 // Block self 4635 S += "@?"; 4636 // Block parameters 4637 if (const FunctionProtoType *FPT = dyn_cast<FunctionProtoType>(FT)) { 4638 for (FunctionProtoType::arg_type_iterator I = FPT->arg_type_begin(), 4639 E = FPT->arg_type_end(); I && (I != E); ++I) { 4640 getObjCEncodingForTypeImpl(*I, S, 4641 ExpandPointedToStructures, 4642 ExpandStructures, 4643 FD, 4644 false /* OutermostType */, 4645 EncodingProperty, 4646 false /* StructField */, 4647 EncodeBlockParameters, 4648 EncodeClassNames); 4649 } 4650 } 4651 S += '>'; 4652 } 4653 return; 4654 } 4655 4656 // Ignore protocol qualifiers when mangling at this level. 4657 if (const ObjCObjectType *OT = T->getAs<ObjCObjectType>()) 4658 T = OT->getBaseType(); 4659 4660 if (const ObjCInterfaceType *OIT = T->getAs<ObjCInterfaceType>()) { 4661 // @encode(class_name) 4662 ObjCInterfaceDecl *OI = OIT->getDecl(); 4663 S += '{'; 4664 const IdentifierInfo *II = OI->getIdentifier(); 4665 S += II->getName(); 4666 S += '='; 4667 SmallVector<const ObjCIvarDecl*, 32> Ivars; 4668 DeepCollectObjCIvars(OI, true, Ivars); 4669 for (unsigned i = 0, e = Ivars.size(); i != e; ++i) { 4670 const FieldDecl *Field = cast<FieldDecl>(Ivars[i]); 4671 if (Field->isBitField()) 4672 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, Field); 4673 else 4674 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, FD); 4675 } 4676 S += '}'; 4677 return; 4678 } 4679 4680 if (const ObjCObjectPointerType *OPT = T->getAs<ObjCObjectPointerType>()) { 4681 if (OPT->isObjCIdType()) { 4682 S += '@'; 4683 return; 4684 } 4685 4686 if (OPT->isObjCClassType() || OPT->isObjCQualifiedClassType()) { 4687 // FIXME: Consider if we need to output qualifiers for 'Class<p>'. 4688 // Since this is a binary compatibility issue, need to consult with runtime 4689 // folks. Fortunately, this is a *very* obsure construct. 4690 S += '#'; 4691 return; 4692 } 4693 4694 if (OPT->isObjCQualifiedIdType()) { 4695 getObjCEncodingForTypeImpl(getObjCIdType(), S, 4696 ExpandPointedToStructures, 4697 ExpandStructures, FD); 4698 if (FD || EncodingProperty || EncodeClassNames) { 4699 // Note that we do extended encoding of protocol qualifer list 4700 // Only when doing ivar or property encoding. 4701 S += '"'; 4702 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 4703 E = OPT->qual_end(); I != E; ++I) { 4704 S += '<'; 4705 S += (*I)->getNameAsString(); 4706 S += '>'; 4707 } 4708 S += '"'; 4709 } 4710 return; 4711 } 4712 4713 QualType PointeeTy = OPT->getPointeeType(); 4714 if (!EncodingProperty && 4715 isa<TypedefType>(PointeeTy.getTypePtr())) { 4716 // Another historical/compatibility reason. 4717 // We encode the underlying type which comes out as 4718 // {...}; 4719 S += '^'; 4720 getObjCEncodingForTypeImpl(PointeeTy, S, 4721 false, ExpandPointedToStructures, 4722 NULL); 4723 return; 4724 } 4725 4726 S += '@'; 4727 if (OPT->getInterfaceDecl() && 4728 (FD || EncodingProperty || EncodeClassNames)) { 4729 S += '"'; 4730 S += OPT->getInterfaceDecl()->getIdentifier()->getName(); 4731 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 4732 E = OPT->qual_end(); I != E; ++I) { 4733 S += '<'; 4734 S += (*I)->getNameAsString(); 4735 S += '>'; 4736 } 4737 S += '"'; 4738 } 4739 return; 4740 } 4741 4742 // gcc just blithely ignores member pointers. 4743 // TODO: maybe there should be a mangling for these 4744 if (T->getAs<MemberPointerType>()) 4745 return; 4746 4747 if (T->isVectorType()) { 4748 // This matches gcc's encoding, even though technically it is 4749 // insufficient. 4750 // FIXME. We should do a better job than gcc. 4751 return; 4752 } 4753 4754 llvm_unreachable("@encode for type not implemented!"); 4755} 4756 4757void ASTContext::getObjCEncodingForStructureImpl(RecordDecl *RDecl, 4758 std::string &S, 4759 const FieldDecl *FD, 4760 bool includeVBases) const { 4761 assert(RDecl && "Expected non-null RecordDecl"); 4762 assert(!RDecl->isUnion() && "Should not be called for unions"); 4763 if (!RDecl->getDefinition()) 4764 return; 4765 4766 CXXRecordDecl *CXXRec = dyn_cast<CXXRecordDecl>(RDecl); 4767 std::multimap<uint64_t, NamedDecl *> FieldOrBaseOffsets; 4768 const ASTRecordLayout &layout = getASTRecordLayout(RDecl); 4769 4770 if (CXXRec) { 4771 for (CXXRecordDecl::base_class_iterator 4772 BI = CXXRec->bases_begin(), 4773 BE = CXXRec->bases_end(); BI != BE; ++BI) { 4774 if (!BI->isVirtual()) { 4775 CXXRecordDecl *base = BI->getType()->getAsCXXRecordDecl(); 4776 if (base->isEmpty()) 4777 continue; 4778 uint64_t offs = layout.getBaseClassOffsetInBits(base); 4779 FieldOrBaseOffsets.insert(FieldOrBaseOffsets.upper_bound(offs), 4780 std::make_pair(offs, base)); 4781 } 4782 } 4783 } 4784 4785 unsigned i = 0; 4786 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 4787 FieldEnd = RDecl->field_end(); 4788 Field != FieldEnd; ++Field, ++i) { 4789 uint64_t offs = layout.getFieldOffset(i); 4790 FieldOrBaseOffsets.insert(FieldOrBaseOffsets.upper_bound(offs), 4791 std::make_pair(offs, *Field)); 4792 } 4793 4794 if (CXXRec && includeVBases) { 4795 for (CXXRecordDecl::base_class_iterator 4796 BI = CXXRec->vbases_begin(), 4797 BE = CXXRec->vbases_end(); BI != BE; ++BI) { 4798 CXXRecordDecl *base = BI->getType()->getAsCXXRecordDecl(); 4799 if (base->isEmpty()) 4800 continue; 4801 uint64_t offs = layout.getVBaseClassOffsetInBits(base); 4802 if (FieldOrBaseOffsets.find(offs) == FieldOrBaseOffsets.end()) 4803 FieldOrBaseOffsets.insert(FieldOrBaseOffsets.end(), 4804 std::make_pair(offs, base)); 4805 } 4806 } 4807 4808 CharUnits size; 4809 if (CXXRec) { 4810 size = includeVBases ? layout.getSize() : layout.getNonVirtualSize(); 4811 } else { 4812 size = layout.getSize(); 4813 } 4814 4815 uint64_t CurOffs = 0; 4816 std::multimap<uint64_t, NamedDecl *>::iterator 4817 CurLayObj = FieldOrBaseOffsets.begin(); 4818 4819 if ((CurLayObj != FieldOrBaseOffsets.end() && CurLayObj->first != 0) || 4820 (CurLayObj == FieldOrBaseOffsets.end() && 4821 CXXRec && CXXRec->isDynamicClass())) { 4822 assert(CXXRec && CXXRec->isDynamicClass() && 4823 "Offset 0 was empty but no VTable ?"); 4824 if (FD) { 4825 S += "\"_vptr$"; 4826 std::string recname = CXXRec->getNameAsString(); 4827 if (recname.empty()) recname = "?"; 4828 S += recname; 4829 S += '"'; 4830 } 4831 S += "^^?"; 4832 CurOffs += getTypeSize(VoidPtrTy); 4833 } 4834 4835 if (!RDecl->hasFlexibleArrayMember()) { 4836 // Mark the end of the structure. 4837 uint64_t offs = toBits(size); 4838 FieldOrBaseOffsets.insert(FieldOrBaseOffsets.upper_bound(offs), 4839 std::make_pair(offs, (NamedDecl*)0)); 4840 } 4841 4842 for (; CurLayObj != FieldOrBaseOffsets.end(); ++CurLayObj) { 4843 assert(CurOffs <= CurLayObj->first); 4844 4845 if (CurOffs < CurLayObj->first) { 4846 uint64_t padding = CurLayObj->first - CurOffs; 4847 // FIXME: There doesn't seem to be a way to indicate in the encoding that 4848 // packing/alignment of members is different that normal, in which case 4849 // the encoding will be out-of-sync with the real layout. 4850 // If the runtime switches to just consider the size of types without 4851 // taking into account alignment, we could make padding explicit in the 4852 // encoding (e.g. using arrays of chars). The encoding strings would be 4853 // longer then though. 4854 CurOffs += padding; 4855 } 4856 4857 NamedDecl *dcl = CurLayObj->second; 4858 if (dcl == 0) 4859 break; // reached end of structure. 4860 4861 if (CXXRecordDecl *base = dyn_cast<CXXRecordDecl>(dcl)) { 4862 // We expand the bases without their virtual bases since those are going 4863 // in the initial structure. Note that this differs from gcc which 4864 // expands virtual bases each time one is encountered in the hierarchy, 4865 // making the encoding type bigger than it really is. 4866 getObjCEncodingForStructureImpl(base, S, FD, /*includeVBases*/false); 4867 assert(!base->isEmpty()); 4868 CurOffs += toBits(getASTRecordLayout(base).getNonVirtualSize()); 4869 } else { 4870 FieldDecl *field = cast<FieldDecl>(dcl); 4871 if (FD) { 4872 S += '"'; 4873 S += field->getNameAsString(); 4874 S += '"'; 4875 } 4876 4877 if (field->isBitField()) { 4878 EncodeBitField(this, S, field->getType(), field); 4879 CurOffs += field->getBitWidthValue(*this); 4880 } else { 4881 QualType qt = field->getType(); 4882 getLegacyIntegralTypeEncoding(qt); 4883 getObjCEncodingForTypeImpl(qt, S, false, true, FD, 4884 /*OutermostType*/false, 4885 /*EncodingProperty*/false, 4886 /*StructField*/true); 4887 CurOffs += getTypeSize(field->getType()); 4888 } 4889 } 4890 } 4891} 4892 4893void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 4894 std::string& S) const { 4895 if (QT & Decl::OBJC_TQ_In) 4896 S += 'n'; 4897 if (QT & Decl::OBJC_TQ_Inout) 4898 S += 'N'; 4899 if (QT & Decl::OBJC_TQ_Out) 4900 S += 'o'; 4901 if (QT & Decl::OBJC_TQ_Bycopy) 4902 S += 'O'; 4903 if (QT & Decl::OBJC_TQ_Byref) 4904 S += 'R'; 4905 if (QT & Decl::OBJC_TQ_Oneway) 4906 S += 'V'; 4907} 4908 4909void ASTContext::setBuiltinVaListType(QualType T) { 4910 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!"); 4911 4912 BuiltinVaListType = T; 4913} 4914 4915TypedefDecl *ASTContext::getObjCIdDecl() const { 4916 if (!ObjCIdDecl) { 4917 QualType T = getObjCObjectType(ObjCBuiltinIdTy, 0, 0); 4918 T = getObjCObjectPointerType(T); 4919 TypeSourceInfo *IdInfo = getTrivialTypeSourceInfo(T); 4920 ObjCIdDecl = TypedefDecl::Create(const_cast<ASTContext &>(*this), 4921 getTranslationUnitDecl(), 4922 SourceLocation(), SourceLocation(), 4923 &Idents.get("id"), IdInfo); 4924 } 4925 4926 return ObjCIdDecl; 4927} 4928 4929TypedefDecl *ASTContext::getObjCSelDecl() const { 4930 if (!ObjCSelDecl) { 4931 QualType SelT = getPointerType(ObjCBuiltinSelTy); 4932 TypeSourceInfo *SelInfo = getTrivialTypeSourceInfo(SelT); 4933 ObjCSelDecl = TypedefDecl::Create(const_cast<ASTContext &>(*this), 4934 getTranslationUnitDecl(), 4935 SourceLocation(), SourceLocation(), 4936 &Idents.get("SEL"), SelInfo); 4937 } 4938 return ObjCSelDecl; 4939} 4940 4941TypedefDecl *ASTContext::getObjCClassDecl() const { 4942 if (!ObjCClassDecl) { 4943 QualType T = getObjCObjectType(ObjCBuiltinClassTy, 0, 0); 4944 T = getObjCObjectPointerType(T); 4945 TypeSourceInfo *ClassInfo = getTrivialTypeSourceInfo(T); 4946 ObjCClassDecl = TypedefDecl::Create(const_cast<ASTContext &>(*this), 4947 getTranslationUnitDecl(), 4948 SourceLocation(), SourceLocation(), 4949 &Idents.get("Class"), ClassInfo); 4950 } 4951 4952 return ObjCClassDecl; 4953} 4954 4955ObjCInterfaceDecl *ASTContext::getObjCProtocolDecl() const { 4956 if (!ObjCProtocolClassDecl) { 4957 ObjCProtocolClassDecl 4958 = ObjCInterfaceDecl::Create(*this, getTranslationUnitDecl(), 4959 SourceLocation(), 4960 &Idents.get("Protocol"), 4961 /*PrevDecl=*/0, 4962 SourceLocation(), true); 4963 } 4964 4965 return ObjCProtocolClassDecl; 4966} 4967 4968void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) { 4969 assert(ObjCConstantStringType.isNull() && 4970 "'NSConstantString' type already set!"); 4971 4972 ObjCConstantStringType = getObjCInterfaceType(Decl); 4973} 4974 4975/// \brief Retrieve the template name that corresponds to a non-empty 4976/// lookup. 4977TemplateName 4978ASTContext::getOverloadedTemplateName(UnresolvedSetIterator Begin, 4979 UnresolvedSetIterator End) const { 4980 unsigned size = End - Begin; 4981 assert(size > 1 && "set is not overloaded!"); 4982 4983 void *memory = Allocate(sizeof(OverloadedTemplateStorage) + 4984 size * sizeof(FunctionTemplateDecl*)); 4985 OverloadedTemplateStorage *OT = new(memory) OverloadedTemplateStorage(size); 4986 4987 NamedDecl **Storage = OT->getStorage(); 4988 for (UnresolvedSetIterator I = Begin; I != End; ++I) { 4989 NamedDecl *D = *I; 4990 assert(isa<FunctionTemplateDecl>(D) || 4991 (isa<UsingShadowDecl>(D) && 4992 isa<FunctionTemplateDecl>(D->getUnderlyingDecl()))); 4993 *Storage++ = D; 4994 } 4995 4996 return TemplateName(OT); 4997} 4998 4999/// \brief Retrieve the template name that represents a qualified 5000/// template name such as \c std::vector. 5001TemplateName 5002ASTContext::getQualifiedTemplateName(NestedNameSpecifier *NNS, 5003 bool TemplateKeyword, 5004 TemplateDecl *Template) const { 5005 assert(NNS && "Missing nested-name-specifier in qualified template name"); 5006 5007 // FIXME: Canonicalization? 5008 llvm::FoldingSetNodeID ID; 5009 QualifiedTemplateName::Profile(ID, NNS, TemplateKeyword, Template); 5010 5011 void *InsertPos = 0; 5012 QualifiedTemplateName *QTN = 5013 QualifiedTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 5014 if (!QTN) { 5015 QTN = new (*this,4) QualifiedTemplateName(NNS, TemplateKeyword, Template); 5016 QualifiedTemplateNames.InsertNode(QTN, InsertPos); 5017 } 5018 5019 return TemplateName(QTN); 5020} 5021 5022/// \brief Retrieve the template name that represents a dependent 5023/// template name such as \c MetaFun::template apply. 5024TemplateName 5025ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 5026 const IdentifierInfo *Name) const { 5027 assert((!NNS || NNS->isDependent()) && 5028 "Nested name specifier must be dependent"); 5029 5030 llvm::FoldingSetNodeID ID; 5031 DependentTemplateName::Profile(ID, NNS, Name); 5032 5033 void *InsertPos = 0; 5034 DependentTemplateName *QTN = 5035 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 5036 5037 if (QTN) 5038 return TemplateName(QTN); 5039 5040 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 5041 if (CanonNNS == NNS) { 5042 QTN = new (*this,4) DependentTemplateName(NNS, Name); 5043 } else { 5044 TemplateName Canon = getDependentTemplateName(CanonNNS, Name); 5045 QTN = new (*this,4) DependentTemplateName(NNS, Name, Canon); 5046 DependentTemplateName *CheckQTN = 5047 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 5048 assert(!CheckQTN && "Dependent type name canonicalization broken"); 5049 (void)CheckQTN; 5050 } 5051 5052 DependentTemplateNames.InsertNode(QTN, InsertPos); 5053 return TemplateName(QTN); 5054} 5055 5056/// \brief Retrieve the template name that represents a dependent 5057/// template name such as \c MetaFun::template operator+. 5058TemplateName 5059ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 5060 OverloadedOperatorKind Operator) const { 5061 assert((!NNS || NNS->isDependent()) && 5062 "Nested name specifier must be dependent"); 5063 5064 llvm::FoldingSetNodeID ID; 5065 DependentTemplateName::Profile(ID, NNS, Operator); 5066 5067 void *InsertPos = 0; 5068 DependentTemplateName *QTN 5069 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 5070 5071 if (QTN) 5072 return TemplateName(QTN); 5073 5074 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 5075 if (CanonNNS == NNS) { 5076 QTN = new (*this,4) DependentTemplateName(NNS, Operator); 5077 } else { 5078 TemplateName Canon = getDependentTemplateName(CanonNNS, Operator); 5079 QTN = new (*this,4) DependentTemplateName(NNS, Operator, Canon); 5080 5081 DependentTemplateName *CheckQTN 5082 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 5083 assert(!CheckQTN && "Dependent template name canonicalization broken"); 5084 (void)CheckQTN; 5085 } 5086 5087 DependentTemplateNames.InsertNode(QTN, InsertPos); 5088 return TemplateName(QTN); 5089} 5090 5091TemplateName 5092ASTContext::getSubstTemplateTemplateParm(TemplateTemplateParmDecl *param, 5093 TemplateName replacement) const { 5094 llvm::FoldingSetNodeID ID; 5095 SubstTemplateTemplateParmStorage::Profile(ID, param, replacement); 5096 5097 void *insertPos = 0; 5098 SubstTemplateTemplateParmStorage *subst 5099 = SubstTemplateTemplateParms.FindNodeOrInsertPos(ID, insertPos); 5100 5101 if (!subst) { 5102 subst = new (*this) SubstTemplateTemplateParmStorage(param, replacement); 5103 SubstTemplateTemplateParms.InsertNode(subst, insertPos); 5104 } 5105 5106 return TemplateName(subst); 5107} 5108 5109TemplateName 5110ASTContext::getSubstTemplateTemplateParmPack(TemplateTemplateParmDecl *Param, 5111 const TemplateArgument &ArgPack) const { 5112 ASTContext &Self = const_cast<ASTContext &>(*this); 5113 llvm::FoldingSetNodeID ID; 5114 SubstTemplateTemplateParmPackStorage::Profile(ID, Self, Param, ArgPack); 5115 5116 void *InsertPos = 0; 5117 SubstTemplateTemplateParmPackStorage *Subst 5118 = SubstTemplateTemplateParmPacks.FindNodeOrInsertPos(ID, InsertPos); 5119 5120 if (!Subst) { 5121 Subst = new (*this) SubstTemplateTemplateParmPackStorage(Param, 5122 ArgPack.pack_size(), 5123 ArgPack.pack_begin()); 5124 SubstTemplateTemplateParmPacks.InsertNode(Subst, InsertPos); 5125 } 5126 5127 return TemplateName(Subst); 5128} 5129 5130/// getFromTargetType - Given one of the integer types provided by 5131/// TargetInfo, produce the corresponding type. The unsigned @p Type 5132/// is actually a value of type @c TargetInfo::IntType. 5133CanQualType ASTContext::getFromTargetType(unsigned Type) const { 5134 switch (Type) { 5135 case TargetInfo::NoInt: return CanQualType(); 5136 case TargetInfo::SignedShort: return ShortTy; 5137 case TargetInfo::UnsignedShort: return UnsignedShortTy; 5138 case TargetInfo::SignedInt: return IntTy; 5139 case TargetInfo::UnsignedInt: return UnsignedIntTy; 5140 case TargetInfo::SignedLong: return LongTy; 5141 case TargetInfo::UnsignedLong: return UnsignedLongTy; 5142 case TargetInfo::SignedLongLong: return LongLongTy; 5143 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy; 5144 } 5145 5146 llvm_unreachable("Unhandled TargetInfo::IntType value"); 5147} 5148 5149//===----------------------------------------------------------------------===// 5150// Type Predicates. 5151//===----------------------------------------------------------------------===// 5152 5153/// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 5154/// garbage collection attribute. 5155/// 5156Qualifiers::GC ASTContext::getObjCGCAttrKind(QualType Ty) const { 5157 if (getLangOptions().getGC() == LangOptions::NonGC) 5158 return Qualifiers::GCNone; 5159 5160 assert(getLangOptions().ObjC1); 5161 Qualifiers::GC GCAttrs = Ty.getObjCGCAttr(); 5162 5163 // Default behaviour under objective-C's gc is for ObjC pointers 5164 // (or pointers to them) be treated as though they were declared 5165 // as __strong. 5166 if (GCAttrs == Qualifiers::GCNone) { 5167 if (Ty->isObjCObjectPointerType() || Ty->isBlockPointerType()) 5168 return Qualifiers::Strong; 5169 else if (Ty->isPointerType()) 5170 return getObjCGCAttrKind(Ty->getAs<PointerType>()->getPointeeType()); 5171 } else { 5172 // It's not valid to set GC attributes on anything that isn't a 5173 // pointer. 5174#ifndef NDEBUG 5175 QualType CT = Ty->getCanonicalTypeInternal(); 5176 while (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 5177 CT = AT->getElementType(); 5178 assert(CT->isAnyPointerType() || CT->isBlockPointerType()); 5179#endif 5180 } 5181 return GCAttrs; 5182} 5183 5184//===----------------------------------------------------------------------===// 5185// Type Compatibility Testing 5186//===----------------------------------------------------------------------===// 5187 5188/// areCompatVectorTypes - Return true if the two specified vector types are 5189/// compatible. 5190static bool areCompatVectorTypes(const VectorType *LHS, 5191 const VectorType *RHS) { 5192 assert(LHS->isCanonicalUnqualified() && RHS->isCanonicalUnqualified()); 5193 return LHS->getElementType() == RHS->getElementType() && 5194 LHS->getNumElements() == RHS->getNumElements(); 5195} 5196 5197bool ASTContext::areCompatibleVectorTypes(QualType FirstVec, 5198 QualType SecondVec) { 5199 assert(FirstVec->isVectorType() && "FirstVec should be a vector type"); 5200 assert(SecondVec->isVectorType() && "SecondVec should be a vector type"); 5201 5202 if (hasSameUnqualifiedType(FirstVec, SecondVec)) 5203 return true; 5204 5205 // Treat Neon vector types and most AltiVec vector types as if they are the 5206 // equivalent GCC vector types. 5207 const VectorType *First = FirstVec->getAs<VectorType>(); 5208 const VectorType *Second = SecondVec->getAs<VectorType>(); 5209 if (First->getNumElements() == Second->getNumElements() && 5210 hasSameType(First->getElementType(), Second->getElementType()) && 5211 First->getVectorKind() != VectorType::AltiVecPixel && 5212 First->getVectorKind() != VectorType::AltiVecBool && 5213 Second->getVectorKind() != VectorType::AltiVecPixel && 5214 Second->getVectorKind() != VectorType::AltiVecBool) 5215 return true; 5216 5217 return false; 5218} 5219 5220//===----------------------------------------------------------------------===// 5221// ObjCQualifiedIdTypesAreCompatible - Compatibility testing for qualified id's. 5222//===----------------------------------------------------------------------===// 5223 5224/// ProtocolCompatibleWithProtocol - return 'true' if 'lProto' is in the 5225/// inheritance hierarchy of 'rProto'. 5226bool 5227ASTContext::ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 5228 ObjCProtocolDecl *rProto) const { 5229 if (declaresSameEntity(lProto, rProto)) 5230 return true; 5231 for (ObjCProtocolDecl::protocol_iterator PI = rProto->protocol_begin(), 5232 E = rProto->protocol_end(); PI != E; ++PI) 5233 if (ProtocolCompatibleWithProtocol(lProto, *PI)) 5234 return true; 5235 return false; 5236} 5237 5238/// QualifiedIdConformsQualifiedId - compare id<p,...> with id<p1,...> 5239/// return true if lhs's protocols conform to rhs's protocol; false 5240/// otherwise. 5241bool ASTContext::QualifiedIdConformsQualifiedId(QualType lhs, QualType rhs) { 5242 if (lhs->isObjCQualifiedIdType() && rhs->isObjCQualifiedIdType()) 5243 return ObjCQualifiedIdTypesAreCompatible(lhs, rhs, false); 5244 return false; 5245} 5246 5247/// ObjCQualifiedClassTypesAreCompatible - compare Class<p,...> and 5248/// Class<p1, ...>. 5249bool ASTContext::ObjCQualifiedClassTypesAreCompatible(QualType lhs, 5250 QualType rhs) { 5251 const ObjCObjectPointerType *lhsQID = lhs->getAs<ObjCObjectPointerType>(); 5252 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 5253 assert ((lhsQID && rhsOPT) && "ObjCQualifiedClassTypesAreCompatible"); 5254 5255 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 5256 E = lhsQID->qual_end(); I != E; ++I) { 5257 bool match = false; 5258 ObjCProtocolDecl *lhsProto = *I; 5259 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 5260 E = rhsOPT->qual_end(); J != E; ++J) { 5261 ObjCProtocolDecl *rhsProto = *J; 5262 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto)) { 5263 match = true; 5264 break; 5265 } 5266 } 5267 if (!match) 5268 return false; 5269 } 5270 return true; 5271} 5272 5273/// ObjCQualifiedIdTypesAreCompatible - We know that one of lhs/rhs is an 5274/// ObjCQualifiedIDType. 5275bool ASTContext::ObjCQualifiedIdTypesAreCompatible(QualType lhs, QualType rhs, 5276 bool compare) { 5277 // Allow id<P..> and an 'id' or void* type in all cases. 5278 if (lhs->isVoidPointerType() || 5279 lhs->isObjCIdType() || lhs->isObjCClassType()) 5280 return true; 5281 else if (rhs->isVoidPointerType() || 5282 rhs->isObjCIdType() || rhs->isObjCClassType()) 5283 return true; 5284 5285 if (const ObjCObjectPointerType *lhsQID = lhs->getAsObjCQualifiedIdType()) { 5286 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 5287 5288 if (!rhsOPT) return false; 5289 5290 if (rhsOPT->qual_empty()) { 5291 // If the RHS is a unqualified interface pointer "NSString*", 5292 // make sure we check the class hierarchy. 5293 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 5294 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 5295 E = lhsQID->qual_end(); I != E; ++I) { 5296 // when comparing an id<P> on lhs with a static type on rhs, 5297 // see if static class implements all of id's protocols, directly or 5298 // through its super class and categories. 5299 if (!rhsID->ClassImplementsProtocol(*I, true)) 5300 return false; 5301 } 5302 } 5303 // If there are no qualifiers and no interface, we have an 'id'. 5304 return true; 5305 } 5306 // Both the right and left sides have qualifiers. 5307 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 5308 E = lhsQID->qual_end(); I != E; ++I) { 5309 ObjCProtocolDecl *lhsProto = *I; 5310 bool match = false; 5311 5312 // when comparing an id<P> on lhs with a static type on rhs, 5313 // see if static class implements all of id's protocols, directly or 5314 // through its super class and categories. 5315 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 5316 E = rhsOPT->qual_end(); J != E; ++J) { 5317 ObjCProtocolDecl *rhsProto = *J; 5318 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 5319 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 5320 match = true; 5321 break; 5322 } 5323 } 5324 // If the RHS is a qualified interface pointer "NSString<P>*", 5325 // make sure we check the class hierarchy. 5326 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 5327 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 5328 E = lhsQID->qual_end(); I != E; ++I) { 5329 // when comparing an id<P> on lhs with a static type on rhs, 5330 // see if static class implements all of id's protocols, directly or 5331 // through its super class and categories. 5332 if (rhsID->ClassImplementsProtocol(*I, true)) { 5333 match = true; 5334 break; 5335 } 5336 } 5337 } 5338 if (!match) 5339 return false; 5340 } 5341 5342 return true; 5343 } 5344 5345 const ObjCObjectPointerType *rhsQID = rhs->getAsObjCQualifiedIdType(); 5346 assert(rhsQID && "One of the LHS/RHS should be id<x>"); 5347 5348 if (const ObjCObjectPointerType *lhsOPT = 5349 lhs->getAsObjCInterfacePointerType()) { 5350 // If both the right and left sides have qualifiers. 5351 for (ObjCObjectPointerType::qual_iterator I = lhsOPT->qual_begin(), 5352 E = lhsOPT->qual_end(); I != E; ++I) { 5353 ObjCProtocolDecl *lhsProto = *I; 5354 bool match = false; 5355 5356 // when comparing an id<P> on rhs with a static type on lhs, 5357 // see if static class implements all of id's protocols, directly or 5358 // through its super class and categories. 5359 // First, lhs protocols in the qualifier list must be found, direct 5360 // or indirect in rhs's qualifier list or it is a mismatch. 5361 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 5362 E = rhsQID->qual_end(); J != E; ++J) { 5363 ObjCProtocolDecl *rhsProto = *J; 5364 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 5365 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 5366 match = true; 5367 break; 5368 } 5369 } 5370 if (!match) 5371 return false; 5372 } 5373 5374 // Static class's protocols, or its super class or category protocols 5375 // must be found, direct or indirect in rhs's qualifier list or it is a mismatch. 5376 if (ObjCInterfaceDecl *lhsID = lhsOPT->getInterfaceDecl()) { 5377 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 5378 CollectInheritedProtocols(lhsID, LHSInheritedProtocols); 5379 // This is rather dubious but matches gcc's behavior. If lhs has 5380 // no type qualifier and its class has no static protocol(s) 5381 // assume that it is mismatch. 5382 if (LHSInheritedProtocols.empty() && lhsOPT->qual_empty()) 5383 return false; 5384 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 5385 LHSInheritedProtocols.begin(), 5386 E = LHSInheritedProtocols.end(); I != E; ++I) { 5387 bool match = false; 5388 ObjCProtocolDecl *lhsProto = (*I); 5389 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 5390 E = rhsQID->qual_end(); J != E; ++J) { 5391 ObjCProtocolDecl *rhsProto = *J; 5392 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 5393 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 5394 match = true; 5395 break; 5396 } 5397 } 5398 if (!match) 5399 return false; 5400 } 5401 } 5402 return true; 5403 } 5404 return false; 5405} 5406 5407/// canAssignObjCInterfaces - Return true if the two interface types are 5408/// compatible for assignment from RHS to LHS. This handles validation of any 5409/// protocol qualifiers on the LHS or RHS. 5410/// 5411bool ASTContext::canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 5412 const ObjCObjectPointerType *RHSOPT) { 5413 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 5414 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 5415 5416 // If either type represents the built-in 'id' or 'Class' types, return true. 5417 if (LHS->isObjCUnqualifiedIdOrClass() || 5418 RHS->isObjCUnqualifiedIdOrClass()) 5419 return true; 5420 5421 if (LHS->isObjCQualifiedId() || RHS->isObjCQualifiedId()) 5422 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 5423 QualType(RHSOPT,0), 5424 false); 5425 5426 if (LHS->isObjCQualifiedClass() && RHS->isObjCQualifiedClass()) 5427 return ObjCQualifiedClassTypesAreCompatible(QualType(LHSOPT,0), 5428 QualType(RHSOPT,0)); 5429 5430 // If we have 2 user-defined types, fall into that path. 5431 if (LHS->getInterface() && RHS->getInterface()) 5432 return canAssignObjCInterfaces(LHS, RHS); 5433 5434 return false; 5435} 5436 5437/// canAssignObjCInterfacesInBlockPointer - This routine is specifically written 5438/// for providing type-safety for objective-c pointers used to pass/return 5439/// arguments in block literals. When passed as arguments, passing 'A*' where 5440/// 'id' is expected is not OK. Passing 'Sub *" where 'Super *" is expected is 5441/// not OK. For the return type, the opposite is not OK. 5442bool ASTContext::canAssignObjCInterfacesInBlockPointer( 5443 const ObjCObjectPointerType *LHSOPT, 5444 const ObjCObjectPointerType *RHSOPT, 5445 bool BlockReturnType) { 5446 if (RHSOPT->isObjCBuiltinType() || LHSOPT->isObjCIdType()) 5447 return true; 5448 5449 if (LHSOPT->isObjCBuiltinType()) { 5450 return RHSOPT->isObjCBuiltinType() || RHSOPT->isObjCQualifiedIdType(); 5451 } 5452 5453 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 5454 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 5455 QualType(RHSOPT,0), 5456 false); 5457 5458 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 5459 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 5460 if (LHS && RHS) { // We have 2 user-defined types. 5461 if (LHS != RHS) { 5462 if (LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 5463 return BlockReturnType; 5464 if (RHS->getDecl()->isSuperClassOf(LHS->getDecl())) 5465 return !BlockReturnType; 5466 } 5467 else 5468 return true; 5469 } 5470 return false; 5471} 5472 5473/// getIntersectionOfProtocols - This routine finds the intersection of set 5474/// of protocols inherited from two distinct objective-c pointer objects. 5475/// It is used to build composite qualifier list of the composite type of 5476/// the conditional expression involving two objective-c pointer objects. 5477static 5478void getIntersectionOfProtocols(ASTContext &Context, 5479 const ObjCObjectPointerType *LHSOPT, 5480 const ObjCObjectPointerType *RHSOPT, 5481 SmallVectorImpl<ObjCProtocolDecl *> &IntersectionOfProtocols) { 5482 5483 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 5484 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 5485 assert(LHS->getInterface() && "LHS must have an interface base"); 5486 assert(RHS->getInterface() && "RHS must have an interface base"); 5487 5488 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> InheritedProtocolSet; 5489 unsigned LHSNumProtocols = LHS->getNumProtocols(); 5490 if (LHSNumProtocols > 0) 5491 InheritedProtocolSet.insert(LHS->qual_begin(), LHS->qual_end()); 5492 else { 5493 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 5494 Context.CollectInheritedProtocols(LHS->getInterface(), 5495 LHSInheritedProtocols); 5496 InheritedProtocolSet.insert(LHSInheritedProtocols.begin(), 5497 LHSInheritedProtocols.end()); 5498 } 5499 5500 unsigned RHSNumProtocols = RHS->getNumProtocols(); 5501 if (RHSNumProtocols > 0) { 5502 ObjCProtocolDecl **RHSProtocols = 5503 const_cast<ObjCProtocolDecl **>(RHS->qual_begin()); 5504 for (unsigned i = 0; i < RHSNumProtocols; ++i) 5505 if (InheritedProtocolSet.count(RHSProtocols[i])) 5506 IntersectionOfProtocols.push_back(RHSProtocols[i]); 5507 } else { 5508 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> RHSInheritedProtocols; 5509 Context.CollectInheritedProtocols(RHS->getInterface(), 5510 RHSInheritedProtocols); 5511 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 5512 RHSInheritedProtocols.begin(), 5513 E = RHSInheritedProtocols.end(); I != E; ++I) 5514 if (InheritedProtocolSet.count((*I))) 5515 IntersectionOfProtocols.push_back((*I)); 5516 } 5517} 5518 5519/// areCommonBaseCompatible - Returns common base class of the two classes if 5520/// one found. Note that this is O'2 algorithm. But it will be called as the 5521/// last type comparison in a ?-exp of ObjC pointer types before a 5522/// warning is issued. So, its invokation is extremely rare. 5523QualType ASTContext::areCommonBaseCompatible( 5524 const ObjCObjectPointerType *Lptr, 5525 const ObjCObjectPointerType *Rptr) { 5526 const ObjCObjectType *LHS = Lptr->getObjectType(); 5527 const ObjCObjectType *RHS = Rptr->getObjectType(); 5528 const ObjCInterfaceDecl* LDecl = LHS->getInterface(); 5529 const ObjCInterfaceDecl* RDecl = RHS->getInterface(); 5530 if (!LDecl || !RDecl || (declaresSameEntity(LDecl, RDecl))) 5531 return QualType(); 5532 5533 do { 5534 LHS = cast<ObjCInterfaceType>(getObjCInterfaceType(LDecl)); 5535 if (canAssignObjCInterfaces(LHS, RHS)) { 5536 SmallVector<ObjCProtocolDecl *, 8> Protocols; 5537 getIntersectionOfProtocols(*this, Lptr, Rptr, Protocols); 5538 5539 QualType Result = QualType(LHS, 0); 5540 if (!Protocols.empty()) 5541 Result = getObjCObjectType(Result, Protocols.data(), Protocols.size()); 5542 Result = getObjCObjectPointerType(Result); 5543 return Result; 5544 } 5545 } while ((LDecl = LDecl->getSuperClass())); 5546 5547 return QualType(); 5548} 5549 5550bool ASTContext::canAssignObjCInterfaces(const ObjCObjectType *LHS, 5551 const ObjCObjectType *RHS) { 5552 assert(LHS->getInterface() && "LHS is not an interface type"); 5553 assert(RHS->getInterface() && "RHS is not an interface type"); 5554 5555 // Verify that the base decls are compatible: the RHS must be a subclass of 5556 // the LHS. 5557 if (!LHS->getInterface()->isSuperClassOf(RHS->getInterface())) 5558 return false; 5559 5560 // RHS must have a superset of the protocols in the LHS. If the LHS is not 5561 // protocol qualified at all, then we are good. 5562 if (LHS->getNumProtocols() == 0) 5563 return true; 5564 5565 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, 5566 // more detailed analysis is required. 5567 if (RHS->getNumProtocols() == 0) { 5568 // OK, if LHS is a superclass of RHS *and* 5569 // this superclass is assignment compatible with LHS. 5570 // false otherwise. 5571 bool IsSuperClass = 5572 LHS->getInterface()->isSuperClassOf(RHS->getInterface()); 5573 if (IsSuperClass) { 5574 // OK if conversion of LHS to SuperClass results in narrowing of types 5575 // ; i.e., SuperClass may implement at least one of the protocols 5576 // in LHS's protocol list. Example, SuperObj<P1> = lhs<P1,P2> is ok. 5577 // But not SuperObj<P1,P2,P3> = lhs<P1,P2>. 5578 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> SuperClassInheritedProtocols; 5579 CollectInheritedProtocols(RHS->getInterface(), SuperClassInheritedProtocols); 5580 // If super class has no protocols, it is not a match. 5581 if (SuperClassInheritedProtocols.empty()) 5582 return false; 5583 5584 for (ObjCObjectType::qual_iterator LHSPI = LHS->qual_begin(), 5585 LHSPE = LHS->qual_end(); 5586 LHSPI != LHSPE; LHSPI++) { 5587 bool SuperImplementsProtocol = false; 5588 ObjCProtocolDecl *LHSProto = (*LHSPI); 5589 5590 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 5591 SuperClassInheritedProtocols.begin(), 5592 E = SuperClassInheritedProtocols.end(); I != E; ++I) { 5593 ObjCProtocolDecl *SuperClassProto = (*I); 5594 if (SuperClassProto->lookupProtocolNamed(LHSProto->getIdentifier())) { 5595 SuperImplementsProtocol = true; 5596 break; 5597 } 5598 } 5599 if (!SuperImplementsProtocol) 5600 return false; 5601 } 5602 return true; 5603 } 5604 return false; 5605 } 5606 5607 for (ObjCObjectType::qual_iterator LHSPI = LHS->qual_begin(), 5608 LHSPE = LHS->qual_end(); 5609 LHSPI != LHSPE; LHSPI++) { 5610 bool RHSImplementsProtocol = false; 5611 5612 // If the RHS doesn't implement the protocol on the left, the types 5613 // are incompatible. 5614 for (ObjCObjectType::qual_iterator RHSPI = RHS->qual_begin(), 5615 RHSPE = RHS->qual_end(); 5616 RHSPI != RHSPE; RHSPI++) { 5617 if ((*RHSPI)->lookupProtocolNamed((*LHSPI)->getIdentifier())) { 5618 RHSImplementsProtocol = true; 5619 break; 5620 } 5621 } 5622 // FIXME: For better diagnostics, consider passing back the protocol name. 5623 if (!RHSImplementsProtocol) 5624 return false; 5625 } 5626 // The RHS implements all protocols listed on the LHS. 5627 return true; 5628} 5629 5630bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) { 5631 // get the "pointed to" types 5632 const ObjCObjectPointerType *LHSOPT = LHS->getAs<ObjCObjectPointerType>(); 5633 const ObjCObjectPointerType *RHSOPT = RHS->getAs<ObjCObjectPointerType>(); 5634 5635 if (!LHSOPT || !RHSOPT) 5636 return false; 5637 5638 return canAssignObjCInterfaces(LHSOPT, RHSOPT) || 5639 canAssignObjCInterfaces(RHSOPT, LHSOPT); 5640} 5641 5642bool ASTContext::canBindObjCObjectType(QualType To, QualType From) { 5643 return canAssignObjCInterfaces( 5644 getObjCObjectPointerType(To)->getAs<ObjCObjectPointerType>(), 5645 getObjCObjectPointerType(From)->getAs<ObjCObjectPointerType>()); 5646} 5647 5648/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible, 5649/// both shall have the identically qualified version of a compatible type. 5650/// C99 6.2.7p1: Two types have compatible types if their types are the 5651/// same. See 6.7.[2,3,5] for additional rules. 5652bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS, 5653 bool CompareUnqualified) { 5654 if (getLangOptions().CPlusPlus) 5655 return hasSameType(LHS, RHS); 5656 5657 return !mergeTypes(LHS, RHS, false, CompareUnqualified).isNull(); 5658} 5659 5660bool ASTContext::propertyTypesAreCompatible(QualType LHS, QualType RHS) { 5661 return typesAreCompatible(LHS, RHS); 5662} 5663 5664bool ASTContext::typesAreBlockPointerCompatible(QualType LHS, QualType RHS) { 5665 return !mergeTypes(LHS, RHS, true).isNull(); 5666} 5667 5668/// mergeTransparentUnionType - if T is a transparent union type and a member 5669/// of T is compatible with SubType, return the merged type, else return 5670/// QualType() 5671QualType ASTContext::mergeTransparentUnionType(QualType T, QualType SubType, 5672 bool OfBlockPointer, 5673 bool Unqualified) { 5674 if (const RecordType *UT = T->getAsUnionType()) { 5675 RecordDecl *UD = UT->getDecl(); 5676 if (UD->hasAttr<TransparentUnionAttr>()) { 5677 for (RecordDecl::field_iterator it = UD->field_begin(), 5678 itend = UD->field_end(); it != itend; ++it) { 5679 QualType ET = it->getType().getUnqualifiedType(); 5680 QualType MT = mergeTypes(ET, SubType, OfBlockPointer, Unqualified); 5681 if (!MT.isNull()) 5682 return MT; 5683 } 5684 } 5685 } 5686 5687 return QualType(); 5688} 5689 5690/// mergeFunctionArgumentTypes - merge two types which appear as function 5691/// argument types 5692QualType ASTContext::mergeFunctionArgumentTypes(QualType lhs, QualType rhs, 5693 bool OfBlockPointer, 5694 bool Unqualified) { 5695 // GNU extension: two types are compatible if they appear as a function 5696 // argument, one of the types is a transparent union type and the other 5697 // type is compatible with a union member 5698 QualType lmerge = mergeTransparentUnionType(lhs, rhs, OfBlockPointer, 5699 Unqualified); 5700 if (!lmerge.isNull()) 5701 return lmerge; 5702 5703 QualType rmerge = mergeTransparentUnionType(rhs, lhs, OfBlockPointer, 5704 Unqualified); 5705 if (!rmerge.isNull()) 5706 return rmerge; 5707 5708 return mergeTypes(lhs, rhs, OfBlockPointer, Unqualified); 5709} 5710 5711QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs, 5712 bool OfBlockPointer, 5713 bool Unqualified) { 5714 const FunctionType *lbase = lhs->getAs<FunctionType>(); 5715 const FunctionType *rbase = rhs->getAs<FunctionType>(); 5716 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 5717 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 5718 bool allLTypes = true; 5719 bool allRTypes = true; 5720 5721 // Check return type 5722 QualType retType; 5723 if (OfBlockPointer) { 5724 QualType RHS = rbase->getResultType(); 5725 QualType LHS = lbase->getResultType(); 5726 bool UnqualifiedResult = Unqualified; 5727 if (!UnqualifiedResult) 5728 UnqualifiedResult = (!RHS.hasQualifiers() && LHS.hasQualifiers()); 5729 retType = mergeTypes(LHS, RHS, true, UnqualifiedResult, true); 5730 } 5731 else 5732 retType = mergeTypes(lbase->getResultType(), rbase->getResultType(), false, 5733 Unqualified); 5734 if (retType.isNull()) return QualType(); 5735 5736 if (Unqualified) 5737 retType = retType.getUnqualifiedType(); 5738 5739 CanQualType LRetType = getCanonicalType(lbase->getResultType()); 5740 CanQualType RRetType = getCanonicalType(rbase->getResultType()); 5741 if (Unqualified) { 5742 LRetType = LRetType.getUnqualifiedType(); 5743 RRetType = RRetType.getUnqualifiedType(); 5744 } 5745 5746 if (getCanonicalType(retType) != LRetType) 5747 allLTypes = false; 5748 if (getCanonicalType(retType) != RRetType) 5749 allRTypes = false; 5750 5751 // FIXME: double check this 5752 // FIXME: should we error if lbase->getRegParmAttr() != 0 && 5753 // rbase->getRegParmAttr() != 0 && 5754 // lbase->getRegParmAttr() != rbase->getRegParmAttr()? 5755 FunctionType::ExtInfo lbaseInfo = lbase->getExtInfo(); 5756 FunctionType::ExtInfo rbaseInfo = rbase->getExtInfo(); 5757 5758 // Compatible functions must have compatible calling conventions 5759 if (!isSameCallConv(lbaseInfo.getCC(), rbaseInfo.getCC())) 5760 return QualType(); 5761 5762 // Regparm is part of the calling convention. 5763 if (lbaseInfo.getHasRegParm() != rbaseInfo.getHasRegParm()) 5764 return QualType(); 5765 if (lbaseInfo.getRegParm() != rbaseInfo.getRegParm()) 5766 return QualType(); 5767 5768 if (lbaseInfo.getProducesResult() != rbaseInfo.getProducesResult()) 5769 return QualType(); 5770 5771 // functypes which return are preferred over those that do not. 5772 if (lbaseInfo.getNoReturn() && !rbaseInfo.getNoReturn()) 5773 allLTypes = false; 5774 else if (!lbaseInfo.getNoReturn() && rbaseInfo.getNoReturn()) 5775 allRTypes = false; 5776 // FIXME: some uses, e.g. conditional exprs, really want this to be 'both'. 5777 bool NoReturn = lbaseInfo.getNoReturn() || rbaseInfo.getNoReturn(); 5778 5779 FunctionType::ExtInfo einfo = lbaseInfo.withNoReturn(NoReturn); 5780 5781 if (lproto && rproto) { // two C99 style function prototypes 5782 assert(!lproto->hasExceptionSpec() && !rproto->hasExceptionSpec() && 5783 "C++ shouldn't be here"); 5784 unsigned lproto_nargs = lproto->getNumArgs(); 5785 unsigned rproto_nargs = rproto->getNumArgs(); 5786 5787 // Compatible functions must have the same number of arguments 5788 if (lproto_nargs != rproto_nargs) 5789 return QualType(); 5790 5791 // Variadic and non-variadic functions aren't compatible 5792 if (lproto->isVariadic() != rproto->isVariadic()) 5793 return QualType(); 5794 5795 if (lproto->getTypeQuals() != rproto->getTypeQuals()) 5796 return QualType(); 5797 5798 if (LangOpts.ObjCAutoRefCount && 5799 !FunctionTypesMatchOnNSConsumedAttrs(rproto, lproto)) 5800 return QualType(); 5801 5802 // Check argument compatibility 5803 SmallVector<QualType, 10> types; 5804 for (unsigned i = 0; i < lproto_nargs; i++) { 5805 QualType largtype = lproto->getArgType(i).getUnqualifiedType(); 5806 QualType rargtype = rproto->getArgType(i).getUnqualifiedType(); 5807 QualType argtype = mergeFunctionArgumentTypes(largtype, rargtype, 5808 OfBlockPointer, 5809 Unqualified); 5810 if (argtype.isNull()) return QualType(); 5811 5812 if (Unqualified) 5813 argtype = argtype.getUnqualifiedType(); 5814 5815 types.push_back(argtype); 5816 if (Unqualified) { 5817 largtype = largtype.getUnqualifiedType(); 5818 rargtype = rargtype.getUnqualifiedType(); 5819 } 5820 5821 if (getCanonicalType(argtype) != getCanonicalType(largtype)) 5822 allLTypes = false; 5823 if (getCanonicalType(argtype) != getCanonicalType(rargtype)) 5824 allRTypes = false; 5825 } 5826 5827 if (allLTypes) return lhs; 5828 if (allRTypes) return rhs; 5829 5830 FunctionProtoType::ExtProtoInfo EPI = lproto->getExtProtoInfo(); 5831 EPI.ExtInfo = einfo; 5832 return getFunctionType(retType, types.begin(), types.size(), EPI); 5833 } 5834 5835 if (lproto) allRTypes = false; 5836 if (rproto) allLTypes = false; 5837 5838 const FunctionProtoType *proto = lproto ? lproto : rproto; 5839 if (proto) { 5840 assert(!proto->hasExceptionSpec() && "C++ shouldn't be here"); 5841 if (proto->isVariadic()) return QualType(); 5842 // Check that the types are compatible with the types that 5843 // would result from default argument promotions (C99 6.7.5.3p15). 5844 // The only types actually affected are promotable integer 5845 // types and floats, which would be passed as a different 5846 // type depending on whether the prototype is visible. 5847 unsigned proto_nargs = proto->getNumArgs(); 5848 for (unsigned i = 0; i < proto_nargs; ++i) { 5849 QualType argTy = proto->getArgType(i); 5850 5851 // Look at the promotion type of enum types, since that is the type used 5852 // to pass enum values. 5853 if (const EnumType *Enum = argTy->getAs<EnumType>()) 5854 argTy = Enum->getDecl()->getPromotionType(); 5855 5856 if (argTy->isPromotableIntegerType() || 5857 getCanonicalType(argTy).getUnqualifiedType() == FloatTy) 5858 return QualType(); 5859 } 5860 5861 if (allLTypes) return lhs; 5862 if (allRTypes) return rhs; 5863 5864 FunctionProtoType::ExtProtoInfo EPI = proto->getExtProtoInfo(); 5865 EPI.ExtInfo = einfo; 5866 return getFunctionType(retType, proto->arg_type_begin(), 5867 proto->getNumArgs(), EPI); 5868 } 5869 5870 if (allLTypes) return lhs; 5871 if (allRTypes) return rhs; 5872 return getFunctionNoProtoType(retType, einfo); 5873} 5874 5875QualType ASTContext::mergeTypes(QualType LHS, QualType RHS, 5876 bool OfBlockPointer, 5877 bool Unqualified, bool BlockReturnType) { 5878 // C++ [expr]: If an expression initially has the type "reference to T", the 5879 // type is adjusted to "T" prior to any further analysis, the expression 5880 // designates the object or function denoted by the reference, and the 5881 // expression is an lvalue unless the reference is an rvalue reference and 5882 // the expression is a function call (possibly inside parentheses). 5883 assert(!LHS->getAs<ReferenceType>() && "LHS is a reference type?"); 5884 assert(!RHS->getAs<ReferenceType>() && "RHS is a reference type?"); 5885 5886 if (Unqualified) { 5887 LHS = LHS.getUnqualifiedType(); 5888 RHS = RHS.getUnqualifiedType(); 5889 } 5890 5891 QualType LHSCan = getCanonicalType(LHS), 5892 RHSCan = getCanonicalType(RHS); 5893 5894 // If two types are identical, they are compatible. 5895 if (LHSCan == RHSCan) 5896 return LHS; 5897 5898 // If the qualifiers are different, the types aren't compatible... mostly. 5899 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 5900 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 5901 if (LQuals != RQuals) { 5902 // If any of these qualifiers are different, we have a type 5903 // mismatch. 5904 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 5905 LQuals.getAddressSpace() != RQuals.getAddressSpace() || 5906 LQuals.getObjCLifetime() != RQuals.getObjCLifetime()) 5907 return QualType(); 5908 5909 // Exactly one GC qualifier difference is allowed: __strong is 5910 // okay if the other type has no GC qualifier but is an Objective 5911 // C object pointer (i.e. implicitly strong by default). We fix 5912 // this by pretending that the unqualified type was actually 5913 // qualified __strong. 5914 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 5915 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 5916 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 5917 5918 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 5919 return QualType(); 5920 5921 if (GC_L == Qualifiers::Strong && RHSCan->isObjCObjectPointerType()) { 5922 return mergeTypes(LHS, getObjCGCQualType(RHS, Qualifiers::Strong)); 5923 } 5924 if (GC_R == Qualifiers::Strong && LHSCan->isObjCObjectPointerType()) { 5925 return mergeTypes(getObjCGCQualType(LHS, Qualifiers::Strong), RHS); 5926 } 5927 return QualType(); 5928 } 5929 5930 // Okay, qualifiers are equal. 5931 5932 Type::TypeClass LHSClass = LHSCan->getTypeClass(); 5933 Type::TypeClass RHSClass = RHSCan->getTypeClass(); 5934 5935 // We want to consider the two function types to be the same for these 5936 // comparisons, just force one to the other. 5937 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto; 5938 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto; 5939 5940 // Same as above for arrays 5941 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray) 5942 LHSClass = Type::ConstantArray; 5943 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray) 5944 RHSClass = Type::ConstantArray; 5945 5946 // ObjCInterfaces are just specialized ObjCObjects. 5947 if (LHSClass == Type::ObjCInterface) LHSClass = Type::ObjCObject; 5948 if (RHSClass == Type::ObjCInterface) RHSClass = Type::ObjCObject; 5949 5950 // Canonicalize ExtVector -> Vector. 5951 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector; 5952 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector; 5953 5954 // If the canonical type classes don't match. 5955 if (LHSClass != RHSClass) { 5956 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char, 5957 // a signed integer type, or an unsigned integer type. 5958 // Compatibility is based on the underlying type, not the promotion 5959 // type. 5960 if (const EnumType* ETy = LHS->getAs<EnumType>()) { 5961 if (ETy->getDecl()->getIntegerType() == RHSCan.getUnqualifiedType()) 5962 return RHS; 5963 } 5964 if (const EnumType* ETy = RHS->getAs<EnumType>()) { 5965 if (ETy->getDecl()->getIntegerType() == LHSCan.getUnqualifiedType()) 5966 return LHS; 5967 } 5968 // allow block pointer type to match an 'id' type. 5969 if (OfBlockPointer && !BlockReturnType) { 5970 if (LHS->isObjCIdType() && RHS->isBlockPointerType()) 5971 return LHS; 5972 if (RHS->isObjCIdType() && LHS->isBlockPointerType()) 5973 return RHS; 5974 } 5975 5976 return QualType(); 5977 } 5978 5979 // The canonical type classes match. 5980 switch (LHSClass) { 5981#define TYPE(Class, Base) 5982#define ABSTRACT_TYPE(Class, Base) 5983#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) case Type::Class: 5984#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 5985#define DEPENDENT_TYPE(Class, Base) case Type::Class: 5986#include "clang/AST/TypeNodes.def" 5987 llvm_unreachable("Non-canonical and dependent types shouldn't get here"); 5988 5989 case Type::LValueReference: 5990 case Type::RValueReference: 5991 case Type::MemberPointer: 5992 llvm_unreachable("C++ should never be in mergeTypes"); 5993 5994 case Type::ObjCInterface: 5995 case Type::IncompleteArray: 5996 case Type::VariableArray: 5997 case Type::FunctionProto: 5998 case Type::ExtVector: 5999 llvm_unreachable("Types are eliminated above"); 6000 6001 case Type::Pointer: 6002 { 6003 // Merge two pointer types, while trying to preserve typedef info 6004 QualType LHSPointee = LHS->getAs<PointerType>()->getPointeeType(); 6005 QualType RHSPointee = RHS->getAs<PointerType>()->getPointeeType(); 6006 if (Unqualified) { 6007 LHSPointee = LHSPointee.getUnqualifiedType(); 6008 RHSPointee = RHSPointee.getUnqualifiedType(); 6009 } 6010 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, false, 6011 Unqualified); 6012 if (ResultType.isNull()) return QualType(); 6013 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 6014 return LHS; 6015 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 6016 return RHS; 6017 return getPointerType(ResultType); 6018 } 6019 case Type::BlockPointer: 6020 { 6021 // Merge two block pointer types, while trying to preserve typedef info 6022 QualType LHSPointee = LHS->getAs<BlockPointerType>()->getPointeeType(); 6023 QualType RHSPointee = RHS->getAs<BlockPointerType>()->getPointeeType(); 6024 if (Unqualified) { 6025 LHSPointee = LHSPointee.getUnqualifiedType(); 6026 RHSPointee = RHSPointee.getUnqualifiedType(); 6027 } 6028 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, OfBlockPointer, 6029 Unqualified); 6030 if (ResultType.isNull()) return QualType(); 6031 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 6032 return LHS; 6033 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 6034 return RHS; 6035 return getBlockPointerType(ResultType); 6036 } 6037 case Type::Atomic: 6038 { 6039 // Merge two pointer types, while trying to preserve typedef info 6040 QualType LHSValue = LHS->getAs<AtomicType>()->getValueType(); 6041 QualType RHSValue = RHS->getAs<AtomicType>()->getValueType(); 6042 if (Unqualified) { 6043 LHSValue = LHSValue.getUnqualifiedType(); 6044 RHSValue = RHSValue.getUnqualifiedType(); 6045 } 6046 QualType ResultType = mergeTypes(LHSValue, RHSValue, false, 6047 Unqualified); 6048 if (ResultType.isNull()) return QualType(); 6049 if (getCanonicalType(LHSValue) == getCanonicalType(ResultType)) 6050 return LHS; 6051 if (getCanonicalType(RHSValue) == getCanonicalType(ResultType)) 6052 return RHS; 6053 return getAtomicType(ResultType); 6054 } 6055 case Type::ConstantArray: 6056 { 6057 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS); 6058 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS); 6059 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize()) 6060 return QualType(); 6061 6062 QualType LHSElem = getAsArrayType(LHS)->getElementType(); 6063 QualType RHSElem = getAsArrayType(RHS)->getElementType(); 6064 if (Unqualified) { 6065 LHSElem = LHSElem.getUnqualifiedType(); 6066 RHSElem = RHSElem.getUnqualifiedType(); 6067 } 6068 6069 QualType ResultType = mergeTypes(LHSElem, RHSElem, false, Unqualified); 6070 if (ResultType.isNull()) return QualType(); 6071 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 6072 return LHS; 6073 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 6074 return RHS; 6075 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(), 6076 ArrayType::ArraySizeModifier(), 0); 6077 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(), 6078 ArrayType::ArraySizeModifier(), 0); 6079 const VariableArrayType* LVAT = getAsVariableArrayType(LHS); 6080 const VariableArrayType* RVAT = getAsVariableArrayType(RHS); 6081 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 6082 return LHS; 6083 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 6084 return RHS; 6085 if (LVAT) { 6086 // FIXME: This isn't correct! But tricky to implement because 6087 // the array's size has to be the size of LHS, but the type 6088 // has to be different. 6089 return LHS; 6090 } 6091 if (RVAT) { 6092 // FIXME: This isn't correct! But tricky to implement because 6093 // the array's size has to be the size of RHS, but the type 6094 // has to be different. 6095 return RHS; 6096 } 6097 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS; 6098 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS; 6099 return getIncompleteArrayType(ResultType, 6100 ArrayType::ArraySizeModifier(), 0); 6101 } 6102 case Type::FunctionNoProto: 6103 return mergeFunctionTypes(LHS, RHS, OfBlockPointer, Unqualified); 6104 case Type::Record: 6105 case Type::Enum: 6106 return QualType(); 6107 case Type::Builtin: 6108 // Only exactly equal builtin types are compatible, which is tested above. 6109 return QualType(); 6110 case Type::Complex: 6111 // Distinct complex types are incompatible. 6112 return QualType(); 6113 case Type::Vector: 6114 // FIXME: The merged type should be an ExtVector! 6115 if (areCompatVectorTypes(LHSCan->getAs<VectorType>(), 6116 RHSCan->getAs<VectorType>())) 6117 return LHS; 6118 return QualType(); 6119 case Type::ObjCObject: { 6120 // Check if the types are assignment compatible. 6121 // FIXME: This should be type compatibility, e.g. whether 6122 // "LHS x; RHS x;" at global scope is legal. 6123 const ObjCObjectType* LHSIface = LHS->getAs<ObjCObjectType>(); 6124 const ObjCObjectType* RHSIface = RHS->getAs<ObjCObjectType>(); 6125 if (canAssignObjCInterfaces(LHSIface, RHSIface)) 6126 return LHS; 6127 6128 return QualType(); 6129 } 6130 case Type::ObjCObjectPointer: { 6131 if (OfBlockPointer) { 6132 if (canAssignObjCInterfacesInBlockPointer( 6133 LHS->getAs<ObjCObjectPointerType>(), 6134 RHS->getAs<ObjCObjectPointerType>(), 6135 BlockReturnType)) 6136 return LHS; 6137 return QualType(); 6138 } 6139 if (canAssignObjCInterfaces(LHS->getAs<ObjCObjectPointerType>(), 6140 RHS->getAs<ObjCObjectPointerType>())) 6141 return LHS; 6142 6143 return QualType(); 6144 } 6145 } 6146 6147 llvm_unreachable("Invalid Type::Class!"); 6148} 6149 6150bool ASTContext::FunctionTypesMatchOnNSConsumedAttrs( 6151 const FunctionProtoType *FromFunctionType, 6152 const FunctionProtoType *ToFunctionType) { 6153 if (FromFunctionType->hasAnyConsumedArgs() != 6154 ToFunctionType->hasAnyConsumedArgs()) 6155 return false; 6156 FunctionProtoType::ExtProtoInfo FromEPI = 6157 FromFunctionType->getExtProtoInfo(); 6158 FunctionProtoType::ExtProtoInfo ToEPI = 6159 ToFunctionType->getExtProtoInfo(); 6160 if (FromEPI.ConsumedArguments && ToEPI.ConsumedArguments) 6161 for (unsigned ArgIdx = 0, NumArgs = FromFunctionType->getNumArgs(); 6162 ArgIdx != NumArgs; ++ArgIdx) { 6163 if (FromEPI.ConsumedArguments[ArgIdx] != 6164 ToEPI.ConsumedArguments[ArgIdx]) 6165 return false; 6166 } 6167 return true; 6168} 6169 6170/// mergeObjCGCQualifiers - This routine merges ObjC's GC attribute of 'LHS' and 6171/// 'RHS' attributes and returns the merged version; including for function 6172/// return types. 6173QualType ASTContext::mergeObjCGCQualifiers(QualType LHS, QualType RHS) { 6174 QualType LHSCan = getCanonicalType(LHS), 6175 RHSCan = getCanonicalType(RHS); 6176 // If two types are identical, they are compatible. 6177 if (LHSCan == RHSCan) 6178 return LHS; 6179 if (RHSCan->isFunctionType()) { 6180 if (!LHSCan->isFunctionType()) 6181 return QualType(); 6182 QualType OldReturnType = 6183 cast<FunctionType>(RHSCan.getTypePtr())->getResultType(); 6184 QualType NewReturnType = 6185 cast<FunctionType>(LHSCan.getTypePtr())->getResultType(); 6186 QualType ResReturnType = 6187 mergeObjCGCQualifiers(NewReturnType, OldReturnType); 6188 if (ResReturnType.isNull()) 6189 return QualType(); 6190 if (ResReturnType == NewReturnType || ResReturnType == OldReturnType) { 6191 // id foo(); ... __strong id foo(); or: __strong id foo(); ... id foo(); 6192 // In either case, use OldReturnType to build the new function type. 6193 const FunctionType *F = LHS->getAs<FunctionType>(); 6194 if (const FunctionProtoType *FPT = cast<FunctionProtoType>(F)) { 6195 FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); 6196 EPI.ExtInfo = getFunctionExtInfo(LHS); 6197 QualType ResultType 6198 = getFunctionType(OldReturnType, FPT->arg_type_begin(), 6199 FPT->getNumArgs(), EPI); 6200 return ResultType; 6201 } 6202 } 6203 return QualType(); 6204 } 6205 6206 // If the qualifiers are different, the types can still be merged. 6207 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 6208 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 6209 if (LQuals != RQuals) { 6210 // If any of these qualifiers are different, we have a type mismatch. 6211 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 6212 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 6213 return QualType(); 6214 6215 // Exactly one GC qualifier difference is allowed: __strong is 6216 // okay if the other type has no GC qualifier but is an Objective 6217 // C object pointer (i.e. implicitly strong by default). We fix 6218 // this by pretending that the unqualified type was actually 6219 // qualified __strong. 6220 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 6221 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 6222 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 6223 6224 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 6225 return QualType(); 6226 6227 if (GC_L == Qualifiers::Strong) 6228 return LHS; 6229 if (GC_R == Qualifiers::Strong) 6230 return RHS; 6231 return QualType(); 6232 } 6233 6234 if (LHSCan->isObjCObjectPointerType() && RHSCan->isObjCObjectPointerType()) { 6235 QualType LHSBaseQT = LHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 6236 QualType RHSBaseQT = RHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 6237 QualType ResQT = mergeObjCGCQualifiers(LHSBaseQT, RHSBaseQT); 6238 if (ResQT == LHSBaseQT) 6239 return LHS; 6240 if (ResQT == RHSBaseQT) 6241 return RHS; 6242 } 6243 return QualType(); 6244} 6245 6246//===----------------------------------------------------------------------===// 6247// Integer Predicates 6248//===----------------------------------------------------------------------===// 6249 6250unsigned ASTContext::getIntWidth(QualType T) const { 6251 if (const EnumType *ET = dyn_cast<EnumType>(T)) 6252 T = ET->getDecl()->getIntegerType(); 6253 if (T->isBooleanType()) 6254 return 1; 6255 // For builtin types, just use the standard type sizing method 6256 return (unsigned)getTypeSize(T); 6257} 6258 6259QualType ASTContext::getCorrespondingUnsignedType(QualType T) { 6260 assert(T->hasSignedIntegerRepresentation() && "Unexpected type"); 6261 6262 // Turn <4 x signed int> -> <4 x unsigned int> 6263 if (const VectorType *VTy = T->getAs<VectorType>()) 6264 return getVectorType(getCorrespondingUnsignedType(VTy->getElementType()), 6265 VTy->getNumElements(), VTy->getVectorKind()); 6266 6267 // For enums, we return the unsigned version of the base type. 6268 if (const EnumType *ETy = T->getAs<EnumType>()) 6269 T = ETy->getDecl()->getIntegerType(); 6270 6271 const BuiltinType *BTy = T->getAs<BuiltinType>(); 6272 assert(BTy && "Unexpected signed integer type"); 6273 switch (BTy->getKind()) { 6274 case BuiltinType::Char_S: 6275 case BuiltinType::SChar: 6276 return UnsignedCharTy; 6277 case BuiltinType::Short: 6278 return UnsignedShortTy; 6279 case BuiltinType::Int: 6280 return UnsignedIntTy; 6281 case BuiltinType::Long: 6282 return UnsignedLongTy; 6283 case BuiltinType::LongLong: 6284 return UnsignedLongLongTy; 6285 case BuiltinType::Int128: 6286 return UnsignedInt128Ty; 6287 default: 6288 llvm_unreachable("Unexpected signed integer type"); 6289 } 6290} 6291 6292ASTMutationListener::~ASTMutationListener() { } 6293 6294 6295//===----------------------------------------------------------------------===// 6296// Builtin Type Computation 6297//===----------------------------------------------------------------------===// 6298 6299/// DecodeTypeFromStr - This decodes one type descriptor from Str, advancing the 6300/// pointer over the consumed characters. This returns the resultant type. If 6301/// AllowTypeModifiers is false then modifier like * are not parsed, just basic 6302/// types. This allows "v2i*" to be parsed as a pointer to a v2i instead of 6303/// a vector of "i*". 6304/// 6305/// RequiresICE is filled in on return to indicate whether the value is required 6306/// to be an Integer Constant Expression. 6307static QualType DecodeTypeFromStr(const char *&Str, const ASTContext &Context, 6308 ASTContext::GetBuiltinTypeError &Error, 6309 bool &RequiresICE, 6310 bool AllowTypeModifiers) { 6311 // Modifiers. 6312 int HowLong = 0; 6313 bool Signed = false, Unsigned = false; 6314 RequiresICE = false; 6315 6316 // Read the prefixed modifiers first. 6317 bool Done = false; 6318 while (!Done) { 6319 switch (*Str++) { 6320 default: Done = true; --Str; break; 6321 case 'I': 6322 RequiresICE = true; 6323 break; 6324 case 'S': 6325 assert(!Unsigned && "Can't use both 'S' and 'U' modifiers!"); 6326 assert(!Signed && "Can't use 'S' modifier multiple times!"); 6327 Signed = true; 6328 break; 6329 case 'U': 6330 assert(!Signed && "Can't use both 'S' and 'U' modifiers!"); 6331 assert(!Unsigned && "Can't use 'S' modifier multiple times!"); 6332 Unsigned = true; 6333 break; 6334 case 'L': 6335 assert(HowLong <= 2 && "Can't have LLLL modifier"); 6336 ++HowLong; 6337 break; 6338 } 6339 } 6340 6341 QualType Type; 6342 6343 // Read the base type. 6344 switch (*Str++) { 6345 default: llvm_unreachable("Unknown builtin type letter!"); 6346 case 'v': 6347 assert(HowLong == 0 && !Signed && !Unsigned && 6348 "Bad modifiers used with 'v'!"); 6349 Type = Context.VoidTy; 6350 break; 6351 case 'f': 6352 assert(HowLong == 0 && !Signed && !Unsigned && 6353 "Bad modifiers used with 'f'!"); 6354 Type = Context.FloatTy; 6355 break; 6356 case 'd': 6357 assert(HowLong < 2 && !Signed && !Unsigned && 6358 "Bad modifiers used with 'd'!"); 6359 if (HowLong) 6360 Type = Context.LongDoubleTy; 6361 else 6362 Type = Context.DoubleTy; 6363 break; 6364 case 's': 6365 assert(HowLong == 0 && "Bad modifiers used with 's'!"); 6366 if (Unsigned) 6367 Type = Context.UnsignedShortTy; 6368 else 6369 Type = Context.ShortTy; 6370 break; 6371 case 'i': 6372 if (HowLong == 3) 6373 Type = Unsigned ? Context.UnsignedInt128Ty : Context.Int128Ty; 6374 else if (HowLong == 2) 6375 Type = Unsigned ? Context.UnsignedLongLongTy : Context.LongLongTy; 6376 else if (HowLong == 1) 6377 Type = Unsigned ? Context.UnsignedLongTy : Context.LongTy; 6378 else 6379 Type = Unsigned ? Context.UnsignedIntTy : Context.IntTy; 6380 break; 6381 case 'c': 6382 assert(HowLong == 0 && "Bad modifiers used with 'c'!"); 6383 if (Signed) 6384 Type = Context.SignedCharTy; 6385 else if (Unsigned) 6386 Type = Context.UnsignedCharTy; 6387 else 6388 Type = Context.CharTy; 6389 break; 6390 case 'b': // boolean 6391 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'b'!"); 6392 Type = Context.BoolTy; 6393 break; 6394 case 'z': // size_t. 6395 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'z'!"); 6396 Type = Context.getSizeType(); 6397 break; 6398 case 'F': 6399 Type = Context.getCFConstantStringType(); 6400 break; 6401 case 'G': 6402 Type = Context.getObjCIdType(); 6403 break; 6404 case 'H': 6405 Type = Context.getObjCSelType(); 6406 break; 6407 case 'a': 6408 Type = Context.getBuiltinVaListType(); 6409 assert(!Type.isNull() && "builtin va list type not initialized!"); 6410 break; 6411 case 'A': 6412 // This is a "reference" to a va_list; however, what exactly 6413 // this means depends on how va_list is defined. There are two 6414 // different kinds of va_list: ones passed by value, and ones 6415 // passed by reference. An example of a by-value va_list is 6416 // x86, where va_list is a char*. An example of by-ref va_list 6417 // is x86-64, where va_list is a __va_list_tag[1]. For x86, 6418 // we want this argument to be a char*&; for x86-64, we want 6419 // it to be a __va_list_tag*. 6420 Type = Context.getBuiltinVaListType(); 6421 assert(!Type.isNull() && "builtin va list type not initialized!"); 6422 if (Type->isArrayType()) 6423 Type = Context.getArrayDecayedType(Type); 6424 else 6425 Type = Context.getLValueReferenceType(Type); 6426 break; 6427 case 'V': { 6428 char *End; 6429 unsigned NumElements = strtoul(Str, &End, 10); 6430 assert(End != Str && "Missing vector size"); 6431 Str = End; 6432 6433 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, 6434 RequiresICE, false); 6435 assert(!RequiresICE && "Can't require vector ICE"); 6436 6437 // TODO: No way to make AltiVec vectors in builtins yet. 6438 Type = Context.getVectorType(ElementType, NumElements, 6439 VectorType::GenericVector); 6440 break; 6441 } 6442 case 'X': { 6443 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, RequiresICE, 6444 false); 6445 assert(!RequiresICE && "Can't require complex ICE"); 6446 Type = Context.getComplexType(ElementType); 6447 break; 6448 } 6449 case 'Y' : { 6450 Type = Context.getPointerDiffType(); 6451 break; 6452 } 6453 case 'P': 6454 Type = Context.getFILEType(); 6455 if (Type.isNull()) { 6456 Error = ASTContext::GE_Missing_stdio; 6457 return QualType(); 6458 } 6459 break; 6460 case 'J': 6461 if (Signed) 6462 Type = Context.getsigjmp_bufType(); 6463 else 6464 Type = Context.getjmp_bufType(); 6465 6466 if (Type.isNull()) { 6467 Error = ASTContext::GE_Missing_setjmp; 6468 return QualType(); 6469 } 6470 break; 6471 case 'K': 6472 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'K'!"); 6473 Type = Context.getucontext_tType(); 6474 6475 if (Type.isNull()) { 6476 Error = ASTContext::GE_Missing_ucontext; 6477 return QualType(); 6478 } 6479 break; 6480 } 6481 6482 // If there are modifiers and if we're allowed to parse them, go for it. 6483 Done = !AllowTypeModifiers; 6484 while (!Done) { 6485 switch (char c = *Str++) { 6486 default: Done = true; --Str; break; 6487 case '*': 6488 case '&': { 6489 // Both pointers and references can have their pointee types 6490 // qualified with an address space. 6491 char *End; 6492 unsigned AddrSpace = strtoul(Str, &End, 10); 6493 if (End != Str && AddrSpace != 0) { 6494 Type = Context.getAddrSpaceQualType(Type, AddrSpace); 6495 Str = End; 6496 } 6497 if (c == '*') 6498 Type = Context.getPointerType(Type); 6499 else 6500 Type = Context.getLValueReferenceType(Type); 6501 break; 6502 } 6503 // FIXME: There's no way to have a built-in with an rvalue ref arg. 6504 case 'C': 6505 Type = Type.withConst(); 6506 break; 6507 case 'D': 6508 Type = Context.getVolatileType(Type); 6509 break; 6510 case 'R': 6511 Type = Type.withRestrict(); 6512 break; 6513 } 6514 } 6515 6516 assert((!RequiresICE || Type->isIntegralOrEnumerationType()) && 6517 "Integer constant 'I' type must be an integer"); 6518 6519 return Type; 6520} 6521 6522/// GetBuiltinType - Return the type for the specified builtin. 6523QualType ASTContext::GetBuiltinType(unsigned Id, 6524 GetBuiltinTypeError &Error, 6525 unsigned *IntegerConstantArgs) const { 6526 const char *TypeStr = BuiltinInfo.GetTypeString(Id); 6527 6528 SmallVector<QualType, 8> ArgTypes; 6529 6530 bool RequiresICE = false; 6531 Error = GE_None; 6532 QualType ResType = DecodeTypeFromStr(TypeStr, *this, Error, 6533 RequiresICE, true); 6534 if (Error != GE_None) 6535 return QualType(); 6536 6537 assert(!RequiresICE && "Result of intrinsic cannot be required to be an ICE"); 6538 6539 while (TypeStr[0] && TypeStr[0] != '.') { 6540 QualType Ty = DecodeTypeFromStr(TypeStr, *this, Error, RequiresICE, true); 6541 if (Error != GE_None) 6542 return QualType(); 6543 6544 // If this argument is required to be an IntegerConstantExpression and the 6545 // caller cares, fill in the bitmask we return. 6546 if (RequiresICE && IntegerConstantArgs) 6547 *IntegerConstantArgs |= 1 << ArgTypes.size(); 6548 6549 // Do array -> pointer decay. The builtin should use the decayed type. 6550 if (Ty->isArrayType()) 6551 Ty = getArrayDecayedType(Ty); 6552 6553 ArgTypes.push_back(Ty); 6554 } 6555 6556 assert((TypeStr[0] != '.' || TypeStr[1] == 0) && 6557 "'.' should only occur at end of builtin type list!"); 6558 6559 FunctionType::ExtInfo EI; 6560 if (BuiltinInfo.isNoReturn(Id)) EI = EI.withNoReturn(true); 6561 6562 bool Variadic = (TypeStr[0] == '.'); 6563 6564 // We really shouldn't be making a no-proto type here, especially in C++. 6565 if (ArgTypes.empty() && Variadic) 6566 return getFunctionNoProtoType(ResType, EI); 6567 6568 FunctionProtoType::ExtProtoInfo EPI; 6569 EPI.ExtInfo = EI; 6570 EPI.Variadic = Variadic; 6571 6572 return getFunctionType(ResType, ArgTypes.data(), ArgTypes.size(), EPI); 6573} 6574 6575GVALinkage ASTContext::GetGVALinkageForFunction(const FunctionDecl *FD) { 6576 GVALinkage External = GVA_StrongExternal; 6577 6578 Linkage L = FD->getLinkage(); 6579 switch (L) { 6580 case NoLinkage: 6581 case InternalLinkage: 6582 case UniqueExternalLinkage: 6583 return GVA_Internal; 6584 6585 case ExternalLinkage: 6586 switch (FD->getTemplateSpecializationKind()) { 6587 case TSK_Undeclared: 6588 case TSK_ExplicitSpecialization: 6589 External = GVA_StrongExternal; 6590 break; 6591 6592 case TSK_ExplicitInstantiationDefinition: 6593 return GVA_ExplicitTemplateInstantiation; 6594 6595 case TSK_ExplicitInstantiationDeclaration: 6596 case TSK_ImplicitInstantiation: 6597 External = GVA_TemplateInstantiation; 6598 break; 6599 } 6600 } 6601 6602 if (!FD->isInlined()) 6603 return External; 6604 6605 if (!getLangOptions().CPlusPlus || FD->hasAttr<GNUInlineAttr>()) { 6606 // GNU or C99 inline semantics. Determine whether this symbol should be 6607 // externally visible. 6608 if (FD->isInlineDefinitionExternallyVisible()) 6609 return External; 6610 6611 // C99 inline semantics, where the symbol is not externally visible. 6612 return GVA_C99Inline; 6613 } 6614 6615 // C++0x [temp.explicit]p9: 6616 // [ Note: The intent is that an inline function that is the subject of 6617 // an explicit instantiation declaration will still be implicitly 6618 // instantiated when used so that the body can be considered for 6619 // inlining, but that no out-of-line copy of the inline function would be 6620 // generated in the translation unit. -- end note ] 6621 if (FD->getTemplateSpecializationKind() 6622 == TSK_ExplicitInstantiationDeclaration) 6623 return GVA_C99Inline; 6624 6625 return GVA_CXXInline; 6626} 6627 6628GVALinkage ASTContext::GetGVALinkageForVariable(const VarDecl *VD) { 6629 // If this is a static data member, compute the kind of template 6630 // specialization. Otherwise, this variable is not part of a 6631 // template. 6632 TemplateSpecializationKind TSK = TSK_Undeclared; 6633 if (VD->isStaticDataMember()) 6634 TSK = VD->getTemplateSpecializationKind(); 6635 6636 Linkage L = VD->getLinkage(); 6637 if (L == ExternalLinkage && getLangOptions().CPlusPlus && 6638 VD->getType()->getLinkage() == UniqueExternalLinkage) 6639 L = UniqueExternalLinkage; 6640 6641 switch (L) { 6642 case NoLinkage: 6643 case InternalLinkage: 6644 case UniqueExternalLinkage: 6645 return GVA_Internal; 6646 6647 case ExternalLinkage: 6648 switch (TSK) { 6649 case TSK_Undeclared: 6650 case TSK_ExplicitSpecialization: 6651 return GVA_StrongExternal; 6652 6653 case TSK_ExplicitInstantiationDeclaration: 6654 llvm_unreachable("Variable should not be instantiated"); 6655 // Fall through to treat this like any other instantiation. 6656 6657 case TSK_ExplicitInstantiationDefinition: 6658 return GVA_ExplicitTemplateInstantiation; 6659 6660 case TSK_ImplicitInstantiation: 6661 return GVA_TemplateInstantiation; 6662 } 6663 } 6664 6665 llvm_unreachable("Invalid Linkage!"); 6666} 6667 6668bool ASTContext::DeclMustBeEmitted(const Decl *D) { 6669 if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { 6670 if (!VD->isFileVarDecl()) 6671 return false; 6672 } else if (!isa<FunctionDecl>(D)) 6673 return false; 6674 6675 // Weak references don't produce any output by themselves. 6676 if (D->hasAttr<WeakRefAttr>()) 6677 return false; 6678 6679 // Aliases and used decls are required. 6680 if (D->hasAttr<AliasAttr>() || D->hasAttr<UsedAttr>()) 6681 return true; 6682 6683 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 6684 // Forward declarations aren't required. 6685 if (!FD->doesThisDeclarationHaveABody()) 6686 return FD->doesDeclarationForceExternallyVisibleDefinition(); 6687 6688 // Constructors and destructors are required. 6689 if (FD->hasAttr<ConstructorAttr>() || FD->hasAttr<DestructorAttr>()) 6690 return true; 6691 6692 // The key function for a class is required. 6693 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { 6694 const CXXRecordDecl *RD = MD->getParent(); 6695 if (MD->isOutOfLine() && RD->isDynamicClass()) { 6696 const CXXMethodDecl *KeyFunc = getKeyFunction(RD); 6697 if (KeyFunc && KeyFunc->getCanonicalDecl() == MD->getCanonicalDecl()) 6698 return true; 6699 } 6700 } 6701 6702 GVALinkage Linkage = GetGVALinkageForFunction(FD); 6703 6704 // static, static inline, always_inline, and extern inline functions can 6705 // always be deferred. Normal inline functions can be deferred in C99/C++. 6706 // Implicit template instantiations can also be deferred in C++. 6707 if (Linkage == GVA_Internal || Linkage == GVA_C99Inline || 6708 Linkage == GVA_CXXInline || Linkage == GVA_TemplateInstantiation) 6709 return false; 6710 return true; 6711 } 6712 6713 const VarDecl *VD = cast<VarDecl>(D); 6714 assert(VD->isFileVarDecl() && "Expected file scoped var"); 6715 6716 if (VD->isThisDeclarationADefinition() == VarDecl::DeclarationOnly) 6717 return false; 6718 6719 // Structs that have non-trivial constructors or destructors are required. 6720 6721 // FIXME: Handle references. 6722 // FIXME: Be more selective about which constructors we care about. 6723 if (const RecordType *RT = VD->getType()->getAs<RecordType>()) { 6724 if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(RT->getDecl())) { 6725 if (RD->hasDefinition() && !(RD->hasTrivialDefaultConstructor() && 6726 RD->hasTrivialCopyConstructor() && 6727 RD->hasTrivialMoveConstructor() && 6728 RD->hasTrivialDestructor())) 6729 return true; 6730 } 6731 } 6732 6733 GVALinkage L = GetGVALinkageForVariable(VD); 6734 if (L == GVA_Internal || L == GVA_TemplateInstantiation) { 6735 if (!(VD->getInit() && VD->getInit()->HasSideEffects(*this))) 6736 return false; 6737 } 6738 6739 return true; 6740} 6741 6742CallingConv ASTContext::getDefaultMethodCallConv() { 6743 // Pass through to the C++ ABI object 6744 return ABI->getDefaultMethodCallConv(); 6745} 6746 6747bool ASTContext::isNearlyEmpty(const CXXRecordDecl *RD) const { 6748 // Pass through to the C++ ABI object 6749 return ABI->isNearlyEmpty(RD); 6750} 6751 6752MangleContext *ASTContext::createMangleContext() { 6753 switch (Target->getCXXABI()) { 6754 case CXXABI_ARM: 6755 case CXXABI_Itanium: 6756 return createItaniumMangleContext(*this, getDiagnostics()); 6757 case CXXABI_Microsoft: 6758 return createMicrosoftMangleContext(*this, getDiagnostics()); 6759 } 6760 llvm_unreachable("Unsupported ABI"); 6761} 6762 6763CXXABI::~CXXABI() {} 6764 6765size_t ASTContext::getSideTableAllocatedMemory() const { 6766 return ASTRecordLayouts.getMemorySize() 6767 + llvm::capacity_in_bytes(ObjCLayouts) 6768 + llvm::capacity_in_bytes(KeyFunctions) 6769 + llvm::capacity_in_bytes(ObjCImpls) 6770 + llvm::capacity_in_bytes(BlockVarCopyInits) 6771 + llvm::capacity_in_bytes(DeclAttrs) 6772 + llvm::capacity_in_bytes(InstantiatedFromStaticDataMember) 6773 + llvm::capacity_in_bytes(InstantiatedFromUsingDecl) 6774 + llvm::capacity_in_bytes(InstantiatedFromUsingShadowDecl) 6775 + llvm::capacity_in_bytes(InstantiatedFromUnnamedFieldDecl) 6776 + llvm::capacity_in_bytes(OverriddenMethods) 6777 + llvm::capacity_in_bytes(Types) 6778 + llvm::capacity_in_bytes(VariableArrayTypes) 6779 + llvm::capacity_in_bytes(ClassScopeSpecializationPattern); 6780} 6781 6782void ASTContext::setParameterIndex(const ParmVarDecl *D, unsigned int index) { 6783 ParamIndices[D] = index; 6784} 6785 6786unsigned ASTContext::getParameterIndex(const ParmVarDecl *D) const { 6787 ParameterIndexTable::const_iterator I = ParamIndices.find(D); 6788 assert(I != ParamIndices.end() && 6789 "ParmIndices lacks entry set by ParmVarDecl"); 6790 return I->second; 6791} 6792