ASTContext.cpp revision 12fc4b0624706b474fa10308631fa8daf92f340f
1//===--- ASTContext.cpp - Context to hold long-lived AST nodes ------------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file implements the ASTContext interface. 11// 12//===----------------------------------------------------------------------===// 13 14#include "clang/AST/ASTContext.h" 15#include "clang/AST/CharUnits.h" 16#include "clang/AST/DeclCXX.h" 17#include "clang/AST/DeclObjC.h" 18#include "clang/AST/DeclTemplate.h" 19#include "clang/AST/TypeLoc.h" 20#include "clang/AST/Expr.h" 21#include "clang/AST/ExprCXX.h" 22#include "clang/AST/ExternalASTSource.h" 23#include "clang/AST/ASTMutationListener.h" 24#include "clang/AST/RecordLayout.h" 25#include "clang/AST/Mangle.h" 26#include "clang/Basic/Builtins.h" 27#include "clang/Basic/SourceManager.h" 28#include "clang/Basic/TargetInfo.h" 29#include "llvm/ADT/SmallString.h" 30#include "llvm/ADT/StringExtras.h" 31#include "llvm/Support/MathExtras.h" 32#include "llvm/Support/raw_ostream.h" 33#include "llvm/Support/Capacity.h" 34#include "CXXABI.h" 35#include <map> 36 37using namespace clang; 38 39unsigned ASTContext::NumImplicitDefaultConstructors; 40unsigned ASTContext::NumImplicitDefaultConstructorsDeclared; 41unsigned ASTContext::NumImplicitCopyConstructors; 42unsigned ASTContext::NumImplicitCopyConstructorsDeclared; 43unsigned ASTContext::NumImplicitMoveConstructors; 44unsigned ASTContext::NumImplicitMoveConstructorsDeclared; 45unsigned ASTContext::NumImplicitCopyAssignmentOperators; 46unsigned ASTContext::NumImplicitCopyAssignmentOperatorsDeclared; 47unsigned ASTContext::NumImplicitMoveAssignmentOperators; 48unsigned ASTContext::NumImplicitMoveAssignmentOperatorsDeclared; 49unsigned ASTContext::NumImplicitDestructors; 50unsigned ASTContext::NumImplicitDestructorsDeclared; 51 52enum FloatingRank { 53 HalfRank, FloatRank, DoubleRank, LongDoubleRank 54}; 55 56void 57ASTContext::CanonicalTemplateTemplateParm::Profile(llvm::FoldingSetNodeID &ID, 58 TemplateTemplateParmDecl *Parm) { 59 ID.AddInteger(Parm->getDepth()); 60 ID.AddInteger(Parm->getPosition()); 61 ID.AddBoolean(Parm->isParameterPack()); 62 63 TemplateParameterList *Params = Parm->getTemplateParameters(); 64 ID.AddInteger(Params->size()); 65 for (TemplateParameterList::const_iterator P = Params->begin(), 66 PEnd = Params->end(); 67 P != PEnd; ++P) { 68 if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*P)) { 69 ID.AddInteger(0); 70 ID.AddBoolean(TTP->isParameterPack()); 71 continue; 72 } 73 74 if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(*P)) { 75 ID.AddInteger(1); 76 ID.AddBoolean(NTTP->isParameterPack()); 77 ID.AddPointer(NTTP->getType().getAsOpaquePtr()); 78 if (NTTP->isExpandedParameterPack()) { 79 ID.AddBoolean(true); 80 ID.AddInteger(NTTP->getNumExpansionTypes()); 81 for (unsigned I = 0, N = NTTP->getNumExpansionTypes(); I != N; ++I) 82 ID.AddPointer(NTTP->getExpansionType(I).getAsOpaquePtr()); 83 } else 84 ID.AddBoolean(false); 85 continue; 86 } 87 88 TemplateTemplateParmDecl *TTP = cast<TemplateTemplateParmDecl>(*P); 89 ID.AddInteger(2); 90 Profile(ID, TTP); 91 } 92} 93 94TemplateTemplateParmDecl * 95ASTContext::getCanonicalTemplateTemplateParmDecl( 96 TemplateTemplateParmDecl *TTP) const { 97 // Check if we already have a canonical template template parameter. 98 llvm::FoldingSetNodeID ID; 99 CanonicalTemplateTemplateParm::Profile(ID, TTP); 100 void *InsertPos = 0; 101 CanonicalTemplateTemplateParm *Canonical 102 = CanonTemplateTemplateParms.FindNodeOrInsertPos(ID, InsertPos); 103 if (Canonical) 104 return Canonical->getParam(); 105 106 // Build a canonical template parameter list. 107 TemplateParameterList *Params = TTP->getTemplateParameters(); 108 SmallVector<NamedDecl *, 4> CanonParams; 109 CanonParams.reserve(Params->size()); 110 for (TemplateParameterList::const_iterator P = Params->begin(), 111 PEnd = Params->end(); 112 P != PEnd; ++P) { 113 if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*P)) 114 CanonParams.push_back( 115 TemplateTypeParmDecl::Create(*this, getTranslationUnitDecl(), 116 SourceLocation(), 117 SourceLocation(), 118 TTP->getDepth(), 119 TTP->getIndex(), 0, false, 120 TTP->isParameterPack())); 121 else if (NonTypeTemplateParmDecl *NTTP 122 = dyn_cast<NonTypeTemplateParmDecl>(*P)) { 123 QualType T = getCanonicalType(NTTP->getType()); 124 TypeSourceInfo *TInfo = getTrivialTypeSourceInfo(T); 125 NonTypeTemplateParmDecl *Param; 126 if (NTTP->isExpandedParameterPack()) { 127 SmallVector<QualType, 2> ExpandedTypes; 128 SmallVector<TypeSourceInfo *, 2> ExpandedTInfos; 129 for (unsigned I = 0, N = NTTP->getNumExpansionTypes(); I != N; ++I) { 130 ExpandedTypes.push_back(getCanonicalType(NTTP->getExpansionType(I))); 131 ExpandedTInfos.push_back( 132 getTrivialTypeSourceInfo(ExpandedTypes.back())); 133 } 134 135 Param = NonTypeTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 136 SourceLocation(), 137 SourceLocation(), 138 NTTP->getDepth(), 139 NTTP->getPosition(), 0, 140 T, 141 TInfo, 142 ExpandedTypes.data(), 143 ExpandedTypes.size(), 144 ExpandedTInfos.data()); 145 } else { 146 Param = NonTypeTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 147 SourceLocation(), 148 SourceLocation(), 149 NTTP->getDepth(), 150 NTTP->getPosition(), 0, 151 T, 152 NTTP->isParameterPack(), 153 TInfo); 154 } 155 CanonParams.push_back(Param); 156 157 } else 158 CanonParams.push_back(getCanonicalTemplateTemplateParmDecl( 159 cast<TemplateTemplateParmDecl>(*P))); 160 } 161 162 TemplateTemplateParmDecl *CanonTTP 163 = TemplateTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 164 SourceLocation(), TTP->getDepth(), 165 TTP->getPosition(), 166 TTP->isParameterPack(), 167 0, 168 TemplateParameterList::Create(*this, SourceLocation(), 169 SourceLocation(), 170 CanonParams.data(), 171 CanonParams.size(), 172 SourceLocation())); 173 174 // Get the new insert position for the node we care about. 175 Canonical = CanonTemplateTemplateParms.FindNodeOrInsertPos(ID, InsertPos); 176 assert(Canonical == 0 && "Shouldn't be in the map!"); 177 (void)Canonical; 178 179 // Create the canonical template template parameter entry. 180 Canonical = new (*this) CanonicalTemplateTemplateParm(CanonTTP); 181 CanonTemplateTemplateParms.InsertNode(Canonical, InsertPos); 182 return CanonTTP; 183} 184 185CXXABI *ASTContext::createCXXABI(const TargetInfo &T) { 186 if (!LangOpts.CPlusPlus) return 0; 187 188 switch (T.getCXXABI()) { 189 case CXXABI_ARM: 190 return CreateARMCXXABI(*this); 191 case CXXABI_Itanium: 192 return CreateItaniumCXXABI(*this); 193 case CXXABI_Microsoft: 194 return CreateMicrosoftCXXABI(*this); 195 } 196 llvm_unreachable("Invalid CXXABI type!"); 197} 198 199static const LangAS::Map *getAddressSpaceMap(const TargetInfo &T, 200 const LangOptions &LOpts) { 201 if (LOpts.FakeAddressSpaceMap) { 202 // The fake address space map must have a distinct entry for each 203 // language-specific address space. 204 static const unsigned FakeAddrSpaceMap[] = { 205 1, // opencl_global 206 2, // opencl_local 207 3 // opencl_constant 208 }; 209 return &FakeAddrSpaceMap; 210 } else { 211 return &T.getAddressSpaceMap(); 212 } 213} 214 215ASTContext::ASTContext(LangOptions& LOpts, SourceManager &SM, 216 const TargetInfo *t, 217 IdentifierTable &idents, SelectorTable &sels, 218 Builtin::Context &builtins, 219 unsigned size_reserve, 220 bool DelayInitialization) 221 : FunctionProtoTypes(this_()), 222 TemplateSpecializationTypes(this_()), 223 DependentTemplateSpecializationTypes(this_()), 224 SubstTemplateTemplateParmPacks(this_()), 225 GlobalNestedNameSpecifier(0), 226 Int128Decl(0), UInt128Decl(0), 227 ObjCIdDecl(0), ObjCSelDecl(0), ObjCClassDecl(0), ObjCProtocolClassDecl(0), 228 CFConstantStringTypeDecl(0), ObjCInstanceTypeDecl(0), 229 FILEDecl(0), 230 jmp_bufDecl(0), sigjmp_bufDecl(0), ucontext_tDecl(0), 231 BlockDescriptorType(0), BlockDescriptorExtendedType(0), 232 cudaConfigureCallDecl(0), 233 NullTypeSourceInfo(QualType()), 234 FirstLocalImport(), LastLocalImport(), 235 SourceMgr(SM), LangOpts(LOpts), 236 AddrSpaceMap(0), Target(t), PrintingPolicy(LOpts), 237 Idents(idents), Selectors(sels), 238 BuiltinInfo(builtins), 239 DeclarationNames(*this), 240 ExternalSource(0), Listener(0), 241 LastSDM(0, 0), 242 UniqueBlockByRefTypeID(0) 243{ 244 if (size_reserve > 0) Types.reserve(size_reserve); 245 TUDecl = TranslationUnitDecl::Create(*this); 246 247 if (!DelayInitialization) { 248 assert(t && "No target supplied for ASTContext initialization"); 249 InitBuiltinTypes(*t); 250 } 251} 252 253ASTContext::~ASTContext() { 254 // Release the DenseMaps associated with DeclContext objects. 255 // FIXME: Is this the ideal solution? 256 ReleaseDeclContextMaps(); 257 258 // Call all of the deallocation functions. 259 for (unsigned I = 0, N = Deallocations.size(); I != N; ++I) 260 Deallocations[I].first(Deallocations[I].second); 261 262 // Release all of the memory associated with overridden C++ methods. 263 for (llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::iterator 264 OM = OverriddenMethods.begin(), OMEnd = OverriddenMethods.end(); 265 OM != OMEnd; ++OM) 266 OM->second.Destroy(); 267 268 // ASTRecordLayout objects in ASTRecordLayouts must always be destroyed 269 // because they can contain DenseMaps. 270 for (llvm::DenseMap<const ObjCContainerDecl*, 271 const ASTRecordLayout*>::iterator 272 I = ObjCLayouts.begin(), E = ObjCLayouts.end(); I != E; ) 273 // Increment in loop to prevent using deallocated memory. 274 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 275 R->Destroy(*this); 276 277 for (llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*>::iterator 278 I = ASTRecordLayouts.begin(), E = ASTRecordLayouts.end(); I != E; ) { 279 // Increment in loop to prevent using deallocated memory. 280 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 281 R->Destroy(*this); 282 } 283 284 for (llvm::DenseMap<const Decl*, AttrVec*>::iterator A = DeclAttrs.begin(), 285 AEnd = DeclAttrs.end(); 286 A != AEnd; ++A) 287 A->second->~AttrVec(); 288} 289 290void ASTContext::AddDeallocation(void (*Callback)(void*), void *Data) { 291 Deallocations.push_back(std::make_pair(Callback, Data)); 292} 293 294void 295ASTContext::setExternalSource(OwningPtr<ExternalASTSource> &Source) { 296 ExternalSource.reset(Source.take()); 297} 298 299void ASTContext::PrintStats() const { 300 llvm::errs() << "\n*** AST Context Stats:\n"; 301 llvm::errs() << " " << Types.size() << " types total.\n"; 302 303 unsigned counts[] = { 304#define TYPE(Name, Parent) 0, 305#define ABSTRACT_TYPE(Name, Parent) 306#include "clang/AST/TypeNodes.def" 307 0 // Extra 308 }; 309 310 for (unsigned i = 0, e = Types.size(); i != e; ++i) { 311 Type *T = Types[i]; 312 counts[(unsigned)T->getTypeClass()]++; 313 } 314 315 unsigned Idx = 0; 316 unsigned TotalBytes = 0; 317#define TYPE(Name, Parent) \ 318 if (counts[Idx]) \ 319 llvm::errs() << " " << counts[Idx] << " " << #Name \ 320 << " types\n"; \ 321 TotalBytes += counts[Idx] * sizeof(Name##Type); \ 322 ++Idx; 323#define ABSTRACT_TYPE(Name, Parent) 324#include "clang/AST/TypeNodes.def" 325 326 llvm::errs() << "Total bytes = " << TotalBytes << "\n"; 327 328 // Implicit special member functions. 329 llvm::errs() << NumImplicitDefaultConstructorsDeclared << "/" 330 << NumImplicitDefaultConstructors 331 << " implicit default constructors created\n"; 332 llvm::errs() << NumImplicitCopyConstructorsDeclared << "/" 333 << NumImplicitCopyConstructors 334 << " implicit copy constructors created\n"; 335 if (getLangOptions().CPlusPlus) 336 llvm::errs() << NumImplicitMoveConstructorsDeclared << "/" 337 << NumImplicitMoveConstructors 338 << " implicit move constructors created\n"; 339 llvm::errs() << NumImplicitCopyAssignmentOperatorsDeclared << "/" 340 << NumImplicitCopyAssignmentOperators 341 << " implicit copy assignment operators created\n"; 342 if (getLangOptions().CPlusPlus) 343 llvm::errs() << NumImplicitMoveAssignmentOperatorsDeclared << "/" 344 << NumImplicitMoveAssignmentOperators 345 << " implicit move assignment operators created\n"; 346 llvm::errs() << NumImplicitDestructorsDeclared << "/" 347 << NumImplicitDestructors 348 << " implicit destructors created\n"; 349 350 if (ExternalSource.get()) { 351 llvm::errs() << "\n"; 352 ExternalSource->PrintStats(); 353 } 354 355 BumpAlloc.PrintStats(); 356} 357 358TypedefDecl *ASTContext::getInt128Decl() const { 359 if (!Int128Decl) { 360 TypeSourceInfo *TInfo = getTrivialTypeSourceInfo(Int128Ty); 361 Int128Decl = TypedefDecl::Create(const_cast<ASTContext &>(*this), 362 getTranslationUnitDecl(), 363 SourceLocation(), 364 SourceLocation(), 365 &Idents.get("__int128_t"), 366 TInfo); 367 } 368 369 return Int128Decl; 370} 371 372TypedefDecl *ASTContext::getUInt128Decl() const { 373 if (!UInt128Decl) { 374 TypeSourceInfo *TInfo = getTrivialTypeSourceInfo(UnsignedInt128Ty); 375 UInt128Decl = TypedefDecl::Create(const_cast<ASTContext &>(*this), 376 getTranslationUnitDecl(), 377 SourceLocation(), 378 SourceLocation(), 379 &Idents.get("__uint128_t"), 380 TInfo); 381 } 382 383 return UInt128Decl; 384} 385 386void ASTContext::InitBuiltinType(CanQualType &R, BuiltinType::Kind K) { 387 BuiltinType *Ty = new (*this, TypeAlignment) BuiltinType(K); 388 R = CanQualType::CreateUnsafe(QualType(Ty, 0)); 389 Types.push_back(Ty); 390} 391 392void ASTContext::InitBuiltinTypes(const TargetInfo &Target) { 393 assert((!this->Target || this->Target == &Target) && 394 "Incorrect target reinitialization"); 395 assert(VoidTy.isNull() && "Context reinitialized?"); 396 397 this->Target = &Target; 398 399 ABI.reset(createCXXABI(Target)); 400 AddrSpaceMap = getAddressSpaceMap(Target, LangOpts); 401 402 // C99 6.2.5p19. 403 InitBuiltinType(VoidTy, BuiltinType::Void); 404 405 // C99 6.2.5p2. 406 InitBuiltinType(BoolTy, BuiltinType::Bool); 407 // C99 6.2.5p3. 408 if (LangOpts.CharIsSigned) 409 InitBuiltinType(CharTy, BuiltinType::Char_S); 410 else 411 InitBuiltinType(CharTy, BuiltinType::Char_U); 412 // C99 6.2.5p4. 413 InitBuiltinType(SignedCharTy, BuiltinType::SChar); 414 InitBuiltinType(ShortTy, BuiltinType::Short); 415 InitBuiltinType(IntTy, BuiltinType::Int); 416 InitBuiltinType(LongTy, BuiltinType::Long); 417 InitBuiltinType(LongLongTy, BuiltinType::LongLong); 418 419 // C99 6.2.5p6. 420 InitBuiltinType(UnsignedCharTy, BuiltinType::UChar); 421 InitBuiltinType(UnsignedShortTy, BuiltinType::UShort); 422 InitBuiltinType(UnsignedIntTy, BuiltinType::UInt); 423 InitBuiltinType(UnsignedLongTy, BuiltinType::ULong); 424 InitBuiltinType(UnsignedLongLongTy, BuiltinType::ULongLong); 425 426 // C99 6.2.5p10. 427 InitBuiltinType(FloatTy, BuiltinType::Float); 428 InitBuiltinType(DoubleTy, BuiltinType::Double); 429 InitBuiltinType(LongDoubleTy, BuiltinType::LongDouble); 430 431 // GNU extension, 128-bit integers. 432 InitBuiltinType(Int128Ty, BuiltinType::Int128); 433 InitBuiltinType(UnsignedInt128Ty, BuiltinType::UInt128); 434 435 if (LangOpts.CPlusPlus) { // C++ 3.9.1p5 436 if (TargetInfo::isTypeSigned(Target.getWCharType())) 437 InitBuiltinType(WCharTy, BuiltinType::WChar_S); 438 else // -fshort-wchar makes wchar_t be unsigned. 439 InitBuiltinType(WCharTy, BuiltinType::WChar_U); 440 } else // C99 441 WCharTy = getFromTargetType(Target.getWCharType()); 442 443 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 444 InitBuiltinType(Char16Ty, BuiltinType::Char16); 445 else // C99 446 Char16Ty = getFromTargetType(Target.getChar16Type()); 447 448 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 449 InitBuiltinType(Char32Ty, BuiltinType::Char32); 450 else // C99 451 Char32Ty = getFromTargetType(Target.getChar32Type()); 452 453 // Placeholder type for type-dependent expressions whose type is 454 // completely unknown. No code should ever check a type against 455 // DependentTy and users should never see it; however, it is here to 456 // help diagnose failures to properly check for type-dependent 457 // expressions. 458 InitBuiltinType(DependentTy, BuiltinType::Dependent); 459 460 // Placeholder type for functions. 461 InitBuiltinType(OverloadTy, BuiltinType::Overload); 462 463 // Placeholder type for bound members. 464 InitBuiltinType(BoundMemberTy, BuiltinType::BoundMember); 465 466 // Placeholder type for pseudo-objects. 467 InitBuiltinType(PseudoObjectTy, BuiltinType::PseudoObject); 468 469 // "any" type; useful for debugger-like clients. 470 InitBuiltinType(UnknownAnyTy, BuiltinType::UnknownAny); 471 472 // Placeholder type for unbridged ARC casts. 473 InitBuiltinType(ARCUnbridgedCastTy, BuiltinType::ARCUnbridgedCast); 474 475 // C99 6.2.5p11. 476 FloatComplexTy = getComplexType(FloatTy); 477 DoubleComplexTy = getComplexType(DoubleTy); 478 LongDoubleComplexTy = getComplexType(LongDoubleTy); 479 480 BuiltinVaListType = QualType(); 481 482 // Builtin types for 'id', 'Class', and 'SEL'. 483 InitBuiltinType(ObjCBuiltinIdTy, BuiltinType::ObjCId); 484 InitBuiltinType(ObjCBuiltinClassTy, BuiltinType::ObjCClass); 485 InitBuiltinType(ObjCBuiltinSelTy, BuiltinType::ObjCSel); 486 487 ObjCConstantStringType = QualType(); 488 489 // void * type 490 VoidPtrTy = getPointerType(VoidTy); 491 492 // nullptr type (C++0x 2.14.7) 493 InitBuiltinType(NullPtrTy, BuiltinType::NullPtr); 494 495 // half type (OpenCL 6.1.1.1) / ARM NEON __fp16 496 InitBuiltinType(HalfTy, BuiltinType::Half); 497} 498 499DiagnosticsEngine &ASTContext::getDiagnostics() const { 500 return SourceMgr.getDiagnostics(); 501} 502 503AttrVec& ASTContext::getDeclAttrs(const Decl *D) { 504 AttrVec *&Result = DeclAttrs[D]; 505 if (!Result) { 506 void *Mem = Allocate(sizeof(AttrVec)); 507 Result = new (Mem) AttrVec; 508 } 509 510 return *Result; 511} 512 513/// \brief Erase the attributes corresponding to the given declaration. 514void ASTContext::eraseDeclAttrs(const Decl *D) { 515 llvm::DenseMap<const Decl*, AttrVec*>::iterator Pos = DeclAttrs.find(D); 516 if (Pos != DeclAttrs.end()) { 517 Pos->second->~AttrVec(); 518 DeclAttrs.erase(Pos); 519 } 520} 521 522MemberSpecializationInfo * 523ASTContext::getInstantiatedFromStaticDataMember(const VarDecl *Var) { 524 assert(Var->isStaticDataMember() && "Not a static data member"); 525 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *>::iterator Pos 526 = InstantiatedFromStaticDataMember.find(Var); 527 if (Pos == InstantiatedFromStaticDataMember.end()) 528 return 0; 529 530 return Pos->second; 531} 532 533void 534ASTContext::setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 535 TemplateSpecializationKind TSK, 536 SourceLocation PointOfInstantiation) { 537 assert(Inst->isStaticDataMember() && "Not a static data member"); 538 assert(Tmpl->isStaticDataMember() && "Not a static data member"); 539 assert(!InstantiatedFromStaticDataMember[Inst] && 540 "Already noted what static data member was instantiated from"); 541 InstantiatedFromStaticDataMember[Inst] 542 = new (*this) MemberSpecializationInfo(Tmpl, TSK, PointOfInstantiation); 543} 544 545FunctionDecl *ASTContext::getClassScopeSpecializationPattern( 546 const FunctionDecl *FD){ 547 assert(FD && "Specialization is 0"); 548 llvm::DenseMap<const FunctionDecl*, FunctionDecl *>::const_iterator Pos 549 = ClassScopeSpecializationPattern.find(FD); 550 if (Pos == ClassScopeSpecializationPattern.end()) 551 return 0; 552 553 return Pos->second; 554} 555 556void ASTContext::setClassScopeSpecializationPattern(FunctionDecl *FD, 557 FunctionDecl *Pattern) { 558 assert(FD && "Specialization is 0"); 559 assert(Pattern && "Class scope specialization pattern is 0"); 560 ClassScopeSpecializationPattern[FD] = Pattern; 561} 562 563NamedDecl * 564ASTContext::getInstantiatedFromUsingDecl(UsingDecl *UUD) { 565 llvm::DenseMap<UsingDecl *, NamedDecl *>::const_iterator Pos 566 = InstantiatedFromUsingDecl.find(UUD); 567 if (Pos == InstantiatedFromUsingDecl.end()) 568 return 0; 569 570 return Pos->second; 571} 572 573void 574ASTContext::setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern) { 575 assert((isa<UsingDecl>(Pattern) || 576 isa<UnresolvedUsingValueDecl>(Pattern) || 577 isa<UnresolvedUsingTypenameDecl>(Pattern)) && 578 "pattern decl is not a using decl"); 579 assert(!InstantiatedFromUsingDecl[Inst] && "pattern already exists"); 580 InstantiatedFromUsingDecl[Inst] = Pattern; 581} 582 583UsingShadowDecl * 584ASTContext::getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst) { 585 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*>::const_iterator Pos 586 = InstantiatedFromUsingShadowDecl.find(Inst); 587 if (Pos == InstantiatedFromUsingShadowDecl.end()) 588 return 0; 589 590 return Pos->second; 591} 592 593void 594ASTContext::setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 595 UsingShadowDecl *Pattern) { 596 assert(!InstantiatedFromUsingShadowDecl[Inst] && "pattern already exists"); 597 InstantiatedFromUsingShadowDecl[Inst] = Pattern; 598} 599 600FieldDecl *ASTContext::getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field) { 601 llvm::DenseMap<FieldDecl *, FieldDecl *>::iterator Pos 602 = InstantiatedFromUnnamedFieldDecl.find(Field); 603 if (Pos == InstantiatedFromUnnamedFieldDecl.end()) 604 return 0; 605 606 return Pos->second; 607} 608 609void ASTContext::setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, 610 FieldDecl *Tmpl) { 611 assert(!Inst->getDeclName() && "Instantiated field decl is not unnamed"); 612 assert(!Tmpl->getDeclName() && "Template field decl is not unnamed"); 613 assert(!InstantiatedFromUnnamedFieldDecl[Inst] && 614 "Already noted what unnamed field was instantiated from"); 615 616 InstantiatedFromUnnamedFieldDecl[Inst] = Tmpl; 617} 618 619bool ASTContext::ZeroBitfieldFollowsNonBitfield(const FieldDecl *FD, 620 const FieldDecl *LastFD) const { 621 return (FD->isBitField() && LastFD && !LastFD->isBitField() && 622 FD->getBitWidthValue(*this) == 0); 623} 624 625bool ASTContext::ZeroBitfieldFollowsBitfield(const FieldDecl *FD, 626 const FieldDecl *LastFD) const { 627 return (FD->isBitField() && LastFD && LastFD->isBitField() && 628 FD->getBitWidthValue(*this) == 0 && 629 LastFD->getBitWidthValue(*this) != 0); 630} 631 632bool ASTContext::BitfieldFollowsBitfield(const FieldDecl *FD, 633 const FieldDecl *LastFD) const { 634 return (FD->isBitField() && LastFD && LastFD->isBitField() && 635 FD->getBitWidthValue(*this) && 636 LastFD->getBitWidthValue(*this)); 637} 638 639bool ASTContext::NonBitfieldFollowsBitfield(const FieldDecl *FD, 640 const FieldDecl *LastFD) const { 641 return (!FD->isBitField() && LastFD && LastFD->isBitField() && 642 LastFD->getBitWidthValue(*this)); 643} 644 645bool ASTContext::BitfieldFollowsNonBitfield(const FieldDecl *FD, 646 const FieldDecl *LastFD) const { 647 return (FD->isBitField() && LastFD && !LastFD->isBitField() && 648 FD->getBitWidthValue(*this)); 649} 650 651ASTContext::overridden_cxx_method_iterator 652ASTContext::overridden_methods_begin(const CXXMethodDecl *Method) const { 653 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 654 = OverriddenMethods.find(Method); 655 if (Pos == OverriddenMethods.end()) 656 return 0; 657 658 return Pos->second.begin(); 659} 660 661ASTContext::overridden_cxx_method_iterator 662ASTContext::overridden_methods_end(const CXXMethodDecl *Method) const { 663 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 664 = OverriddenMethods.find(Method); 665 if (Pos == OverriddenMethods.end()) 666 return 0; 667 668 return Pos->second.end(); 669} 670 671unsigned 672ASTContext::overridden_methods_size(const CXXMethodDecl *Method) const { 673 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 674 = OverriddenMethods.find(Method); 675 if (Pos == OverriddenMethods.end()) 676 return 0; 677 678 return Pos->second.size(); 679} 680 681void ASTContext::addOverriddenMethod(const CXXMethodDecl *Method, 682 const CXXMethodDecl *Overridden) { 683 OverriddenMethods[Method].push_back(Overridden); 684} 685 686void ASTContext::addedLocalImportDecl(ImportDecl *Import) { 687 assert(!Import->NextLocalImport && "Import declaration already in the chain"); 688 assert(!Import->isFromASTFile() && "Non-local import declaration"); 689 if (!FirstLocalImport) { 690 FirstLocalImport = Import; 691 LastLocalImport = Import; 692 return; 693 } 694 695 LastLocalImport->NextLocalImport = Import; 696 LastLocalImport = Import; 697} 698 699//===----------------------------------------------------------------------===// 700// Type Sizing and Analysis 701//===----------------------------------------------------------------------===// 702 703/// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 704/// scalar floating point type. 705const llvm::fltSemantics &ASTContext::getFloatTypeSemantics(QualType T) const { 706 const BuiltinType *BT = T->getAs<BuiltinType>(); 707 assert(BT && "Not a floating point type!"); 708 switch (BT->getKind()) { 709 default: llvm_unreachable("Not a floating point type!"); 710 case BuiltinType::Half: return Target->getHalfFormat(); 711 case BuiltinType::Float: return Target->getFloatFormat(); 712 case BuiltinType::Double: return Target->getDoubleFormat(); 713 case BuiltinType::LongDouble: return Target->getLongDoubleFormat(); 714 } 715} 716 717/// getDeclAlign - Return a conservative estimate of the alignment of the 718/// specified decl. Note that bitfields do not have a valid alignment, so 719/// this method will assert on them. 720/// If @p RefAsPointee, references are treated like their underlying type 721/// (for alignof), else they're treated like pointers (for CodeGen). 722CharUnits ASTContext::getDeclAlign(const Decl *D, bool RefAsPointee) const { 723 unsigned Align = Target->getCharWidth(); 724 725 bool UseAlignAttrOnly = false; 726 if (unsigned AlignFromAttr = D->getMaxAlignment()) { 727 Align = AlignFromAttr; 728 729 // __attribute__((aligned)) can increase or decrease alignment 730 // *except* on a struct or struct member, where it only increases 731 // alignment unless 'packed' is also specified. 732 // 733 // It is an error for alignas to decrease alignment, so we can 734 // ignore that possibility; Sema should diagnose it. 735 if (isa<FieldDecl>(D)) { 736 UseAlignAttrOnly = D->hasAttr<PackedAttr>() || 737 cast<FieldDecl>(D)->getParent()->hasAttr<PackedAttr>(); 738 } else { 739 UseAlignAttrOnly = true; 740 } 741 } 742 else if (isa<FieldDecl>(D)) 743 UseAlignAttrOnly = 744 D->hasAttr<PackedAttr>() || 745 cast<FieldDecl>(D)->getParent()->hasAttr<PackedAttr>(); 746 747 // If we're using the align attribute only, just ignore everything 748 // else about the declaration and its type. 749 if (UseAlignAttrOnly) { 750 // do nothing 751 752 } else if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) { 753 QualType T = VD->getType(); 754 if (const ReferenceType* RT = T->getAs<ReferenceType>()) { 755 if (RefAsPointee) 756 T = RT->getPointeeType(); 757 else 758 T = getPointerType(RT->getPointeeType()); 759 } 760 if (!T->isIncompleteType() && !T->isFunctionType()) { 761 // Adjust alignments of declarations with array type by the 762 // large-array alignment on the target. 763 unsigned MinWidth = Target->getLargeArrayMinWidth(); 764 const ArrayType *arrayType; 765 if (MinWidth && (arrayType = getAsArrayType(T))) { 766 if (isa<VariableArrayType>(arrayType)) 767 Align = std::max(Align, Target->getLargeArrayAlign()); 768 else if (isa<ConstantArrayType>(arrayType) && 769 MinWidth <= getTypeSize(cast<ConstantArrayType>(arrayType))) 770 Align = std::max(Align, Target->getLargeArrayAlign()); 771 772 // Walk through any array types while we're at it. 773 T = getBaseElementType(arrayType); 774 } 775 Align = std::max(Align, getPreferredTypeAlign(T.getTypePtr())); 776 } 777 778 // Fields can be subject to extra alignment constraints, like if 779 // the field is packed, the struct is packed, or the struct has a 780 // a max-field-alignment constraint (#pragma pack). So calculate 781 // the actual alignment of the field within the struct, and then 782 // (as we're expected to) constrain that by the alignment of the type. 783 if (const FieldDecl *field = dyn_cast<FieldDecl>(VD)) { 784 // So calculate the alignment of the field. 785 const ASTRecordLayout &layout = getASTRecordLayout(field->getParent()); 786 787 // Start with the record's overall alignment. 788 unsigned fieldAlign = toBits(layout.getAlignment()); 789 790 // Use the GCD of that and the offset within the record. 791 uint64_t offset = layout.getFieldOffset(field->getFieldIndex()); 792 if (offset > 0) { 793 // Alignment is always a power of 2, so the GCD will be a power of 2, 794 // which means we get to do this crazy thing instead of Euclid's. 795 uint64_t lowBitOfOffset = offset & (~offset + 1); 796 if (lowBitOfOffset < fieldAlign) 797 fieldAlign = static_cast<unsigned>(lowBitOfOffset); 798 } 799 800 Align = std::min(Align, fieldAlign); 801 } 802 } 803 804 return toCharUnitsFromBits(Align); 805} 806 807std::pair<CharUnits, CharUnits> 808ASTContext::getTypeInfoInChars(const Type *T) const { 809 std::pair<uint64_t, unsigned> Info = getTypeInfo(T); 810 return std::make_pair(toCharUnitsFromBits(Info.first), 811 toCharUnitsFromBits(Info.second)); 812} 813 814std::pair<CharUnits, CharUnits> 815ASTContext::getTypeInfoInChars(QualType T) const { 816 return getTypeInfoInChars(T.getTypePtr()); 817} 818 819/// getTypeSize - Return the size of the specified type, in bits. This method 820/// does not work on incomplete types. 821/// 822/// FIXME: Pointers into different addr spaces could have different sizes and 823/// alignment requirements: getPointerInfo should take an AddrSpace, this 824/// should take a QualType, &c. 825std::pair<uint64_t, unsigned> 826ASTContext::getTypeInfo(const Type *T) const { 827 uint64_t Width=0; 828 unsigned Align=8; 829 switch (T->getTypeClass()) { 830#define TYPE(Class, Base) 831#define ABSTRACT_TYPE(Class, Base) 832#define NON_CANONICAL_TYPE(Class, Base) 833#define DEPENDENT_TYPE(Class, Base) case Type::Class: 834#include "clang/AST/TypeNodes.def" 835 llvm_unreachable("Should not see dependent types"); 836 837 case Type::FunctionNoProto: 838 case Type::FunctionProto: 839 // GCC extension: alignof(function) = 32 bits 840 Width = 0; 841 Align = 32; 842 break; 843 844 case Type::IncompleteArray: 845 case Type::VariableArray: 846 Width = 0; 847 Align = getTypeAlign(cast<ArrayType>(T)->getElementType()); 848 break; 849 850 case Type::ConstantArray: { 851 const ConstantArrayType *CAT = cast<ConstantArrayType>(T); 852 853 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(CAT->getElementType()); 854 uint64_t Size = CAT->getSize().getZExtValue(); 855 assert((Size == 0 || EltInfo.first <= (uint64_t)(-1)/Size) && "Overflow in array type bit size evaluation"); 856 Width = EltInfo.first*Size; 857 Align = EltInfo.second; 858 Width = llvm::RoundUpToAlignment(Width, Align); 859 break; 860 } 861 case Type::ExtVector: 862 case Type::Vector: { 863 const VectorType *VT = cast<VectorType>(T); 864 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(VT->getElementType()); 865 Width = EltInfo.first*VT->getNumElements(); 866 Align = Width; 867 // If the alignment is not a power of 2, round up to the next power of 2. 868 // This happens for non-power-of-2 length vectors. 869 if (Align & (Align-1)) { 870 Align = llvm::NextPowerOf2(Align); 871 Width = llvm::RoundUpToAlignment(Width, Align); 872 } 873 break; 874 } 875 876 case Type::Builtin: 877 switch (cast<BuiltinType>(T)->getKind()) { 878 default: llvm_unreachable("Unknown builtin type!"); 879 case BuiltinType::Void: 880 // GCC extension: alignof(void) = 8 bits. 881 Width = 0; 882 Align = 8; 883 break; 884 885 case BuiltinType::Bool: 886 Width = Target->getBoolWidth(); 887 Align = Target->getBoolAlign(); 888 break; 889 case BuiltinType::Char_S: 890 case BuiltinType::Char_U: 891 case BuiltinType::UChar: 892 case BuiltinType::SChar: 893 Width = Target->getCharWidth(); 894 Align = Target->getCharAlign(); 895 break; 896 case BuiltinType::WChar_S: 897 case BuiltinType::WChar_U: 898 Width = Target->getWCharWidth(); 899 Align = Target->getWCharAlign(); 900 break; 901 case BuiltinType::Char16: 902 Width = Target->getChar16Width(); 903 Align = Target->getChar16Align(); 904 break; 905 case BuiltinType::Char32: 906 Width = Target->getChar32Width(); 907 Align = Target->getChar32Align(); 908 break; 909 case BuiltinType::UShort: 910 case BuiltinType::Short: 911 Width = Target->getShortWidth(); 912 Align = Target->getShortAlign(); 913 break; 914 case BuiltinType::UInt: 915 case BuiltinType::Int: 916 Width = Target->getIntWidth(); 917 Align = Target->getIntAlign(); 918 break; 919 case BuiltinType::ULong: 920 case BuiltinType::Long: 921 Width = Target->getLongWidth(); 922 Align = Target->getLongAlign(); 923 break; 924 case BuiltinType::ULongLong: 925 case BuiltinType::LongLong: 926 Width = Target->getLongLongWidth(); 927 Align = Target->getLongLongAlign(); 928 break; 929 case BuiltinType::Int128: 930 case BuiltinType::UInt128: 931 Width = 128; 932 Align = 128; // int128_t is 128-bit aligned on all targets. 933 break; 934 case BuiltinType::Half: 935 Width = Target->getHalfWidth(); 936 Align = Target->getHalfAlign(); 937 break; 938 case BuiltinType::Float: 939 Width = Target->getFloatWidth(); 940 Align = Target->getFloatAlign(); 941 break; 942 case BuiltinType::Double: 943 Width = Target->getDoubleWidth(); 944 Align = Target->getDoubleAlign(); 945 break; 946 case BuiltinType::LongDouble: 947 Width = Target->getLongDoubleWidth(); 948 Align = Target->getLongDoubleAlign(); 949 break; 950 case BuiltinType::NullPtr: 951 Width = Target->getPointerWidth(0); // C++ 3.9.1p11: sizeof(nullptr_t) 952 Align = Target->getPointerAlign(0); // == sizeof(void*) 953 break; 954 case BuiltinType::ObjCId: 955 case BuiltinType::ObjCClass: 956 case BuiltinType::ObjCSel: 957 Width = Target->getPointerWidth(0); 958 Align = Target->getPointerAlign(0); 959 break; 960 } 961 break; 962 case Type::ObjCObjectPointer: 963 Width = Target->getPointerWidth(0); 964 Align = Target->getPointerAlign(0); 965 break; 966 case Type::BlockPointer: { 967 unsigned AS = getTargetAddressSpace( 968 cast<BlockPointerType>(T)->getPointeeType()); 969 Width = Target->getPointerWidth(AS); 970 Align = Target->getPointerAlign(AS); 971 break; 972 } 973 case Type::LValueReference: 974 case Type::RValueReference: { 975 // alignof and sizeof should never enter this code path here, so we go 976 // the pointer route. 977 unsigned AS = getTargetAddressSpace( 978 cast<ReferenceType>(T)->getPointeeType()); 979 Width = Target->getPointerWidth(AS); 980 Align = Target->getPointerAlign(AS); 981 break; 982 } 983 case Type::Pointer: { 984 unsigned AS = getTargetAddressSpace(cast<PointerType>(T)->getPointeeType()); 985 Width = Target->getPointerWidth(AS); 986 Align = Target->getPointerAlign(AS); 987 break; 988 } 989 case Type::MemberPointer: { 990 const MemberPointerType *MPT = cast<MemberPointerType>(T); 991 std::pair<uint64_t, unsigned> PtrDiffInfo = 992 getTypeInfo(getPointerDiffType()); 993 Width = PtrDiffInfo.first * ABI->getMemberPointerSize(MPT); 994 Align = PtrDiffInfo.second; 995 break; 996 } 997 case Type::Complex: { 998 // Complex types have the same alignment as their elements, but twice the 999 // size. 1000 std::pair<uint64_t, unsigned> EltInfo = 1001 getTypeInfo(cast<ComplexType>(T)->getElementType()); 1002 Width = EltInfo.first*2; 1003 Align = EltInfo.second; 1004 break; 1005 } 1006 case Type::ObjCObject: 1007 return getTypeInfo(cast<ObjCObjectType>(T)->getBaseType().getTypePtr()); 1008 case Type::ObjCInterface: { 1009 const ObjCInterfaceType *ObjCI = cast<ObjCInterfaceType>(T); 1010 const ASTRecordLayout &Layout = getASTObjCInterfaceLayout(ObjCI->getDecl()); 1011 Width = toBits(Layout.getSize()); 1012 Align = toBits(Layout.getAlignment()); 1013 break; 1014 } 1015 case Type::Record: 1016 case Type::Enum: { 1017 const TagType *TT = cast<TagType>(T); 1018 1019 if (TT->getDecl()->isInvalidDecl()) { 1020 Width = 8; 1021 Align = 8; 1022 break; 1023 } 1024 1025 if (const EnumType *ET = dyn_cast<EnumType>(TT)) 1026 return getTypeInfo(ET->getDecl()->getIntegerType()); 1027 1028 const RecordType *RT = cast<RecordType>(TT); 1029 const ASTRecordLayout &Layout = getASTRecordLayout(RT->getDecl()); 1030 Width = toBits(Layout.getSize()); 1031 Align = toBits(Layout.getAlignment()); 1032 break; 1033 } 1034 1035 case Type::SubstTemplateTypeParm: 1036 return getTypeInfo(cast<SubstTemplateTypeParmType>(T)-> 1037 getReplacementType().getTypePtr()); 1038 1039 case Type::Auto: { 1040 const AutoType *A = cast<AutoType>(T); 1041 assert(A->isDeduced() && "Cannot request the size of a dependent type"); 1042 return getTypeInfo(A->getDeducedType().getTypePtr()); 1043 } 1044 1045 case Type::Paren: 1046 return getTypeInfo(cast<ParenType>(T)->getInnerType().getTypePtr()); 1047 1048 case Type::Typedef: { 1049 const TypedefNameDecl *Typedef = cast<TypedefType>(T)->getDecl(); 1050 std::pair<uint64_t, unsigned> Info 1051 = getTypeInfo(Typedef->getUnderlyingType().getTypePtr()); 1052 // If the typedef has an aligned attribute on it, it overrides any computed 1053 // alignment we have. This violates the GCC documentation (which says that 1054 // attribute(aligned) can only round up) but matches its implementation. 1055 if (unsigned AttrAlign = Typedef->getMaxAlignment()) 1056 Align = AttrAlign; 1057 else 1058 Align = Info.second; 1059 Width = Info.first; 1060 break; 1061 } 1062 1063 case Type::TypeOfExpr: 1064 return getTypeInfo(cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType() 1065 .getTypePtr()); 1066 1067 case Type::TypeOf: 1068 return getTypeInfo(cast<TypeOfType>(T)->getUnderlyingType().getTypePtr()); 1069 1070 case Type::Decltype: 1071 return getTypeInfo(cast<DecltypeType>(T)->getUnderlyingExpr()->getType() 1072 .getTypePtr()); 1073 1074 case Type::UnaryTransform: 1075 return getTypeInfo(cast<UnaryTransformType>(T)->getUnderlyingType()); 1076 1077 case Type::Elaborated: 1078 return getTypeInfo(cast<ElaboratedType>(T)->getNamedType().getTypePtr()); 1079 1080 case Type::Attributed: 1081 return getTypeInfo( 1082 cast<AttributedType>(T)->getEquivalentType().getTypePtr()); 1083 1084 case Type::TemplateSpecialization: { 1085 assert(getCanonicalType(T) != T && 1086 "Cannot request the size of a dependent type"); 1087 const TemplateSpecializationType *TST = cast<TemplateSpecializationType>(T); 1088 // A type alias template specialization may refer to a typedef with the 1089 // aligned attribute on it. 1090 if (TST->isTypeAlias()) 1091 return getTypeInfo(TST->getAliasedType().getTypePtr()); 1092 else 1093 return getTypeInfo(getCanonicalType(T)); 1094 } 1095 1096 case Type::Atomic: { 1097 std::pair<uint64_t, unsigned> Info 1098 = getTypeInfo(cast<AtomicType>(T)->getValueType()); 1099 Width = Info.first; 1100 Align = Info.second; 1101 if (Width != 0 && Width <= Target->getMaxAtomicPromoteWidth() && 1102 llvm::isPowerOf2_64(Width)) { 1103 // We can potentially perform lock-free atomic operations for this 1104 // type; promote the alignment appropriately. 1105 // FIXME: We could potentially promote the width here as well... 1106 // is that worthwhile? (Non-struct atomic types generally have 1107 // power-of-two size anyway, but structs might not. Requires a bit 1108 // of implementation work to make sure we zero out the extra bits.) 1109 Align = static_cast<unsigned>(Width); 1110 } 1111 } 1112 1113 } 1114 1115 assert(llvm::isPowerOf2_32(Align) && "Alignment must be power of 2"); 1116 return std::make_pair(Width, Align); 1117} 1118 1119/// toCharUnitsFromBits - Convert a size in bits to a size in characters. 1120CharUnits ASTContext::toCharUnitsFromBits(int64_t BitSize) const { 1121 return CharUnits::fromQuantity(BitSize / getCharWidth()); 1122} 1123 1124/// toBits - Convert a size in characters to a size in characters. 1125int64_t ASTContext::toBits(CharUnits CharSize) const { 1126 return CharSize.getQuantity() * getCharWidth(); 1127} 1128 1129/// getTypeSizeInChars - Return the size of the specified type, in characters. 1130/// This method does not work on incomplete types. 1131CharUnits ASTContext::getTypeSizeInChars(QualType T) const { 1132 return toCharUnitsFromBits(getTypeSize(T)); 1133} 1134CharUnits ASTContext::getTypeSizeInChars(const Type *T) const { 1135 return toCharUnitsFromBits(getTypeSize(T)); 1136} 1137 1138/// getTypeAlignInChars - Return the ABI-specified alignment of a type, in 1139/// characters. This method does not work on incomplete types. 1140CharUnits ASTContext::getTypeAlignInChars(QualType T) const { 1141 return toCharUnitsFromBits(getTypeAlign(T)); 1142} 1143CharUnits ASTContext::getTypeAlignInChars(const Type *T) const { 1144 return toCharUnitsFromBits(getTypeAlign(T)); 1145} 1146 1147/// getPreferredTypeAlign - Return the "preferred" alignment of the specified 1148/// type for the current target in bits. This can be different than the ABI 1149/// alignment in cases where it is beneficial for performance to overalign 1150/// a data type. 1151unsigned ASTContext::getPreferredTypeAlign(const Type *T) const { 1152 unsigned ABIAlign = getTypeAlign(T); 1153 1154 // Double and long long should be naturally aligned if possible. 1155 if (const ComplexType* CT = T->getAs<ComplexType>()) 1156 T = CT->getElementType().getTypePtr(); 1157 if (T->isSpecificBuiltinType(BuiltinType::Double) || 1158 T->isSpecificBuiltinType(BuiltinType::LongLong)) 1159 return std::max(ABIAlign, (unsigned)getTypeSize(T)); 1160 1161 return ABIAlign; 1162} 1163 1164/// DeepCollectObjCIvars - 1165/// This routine first collects all declared, but not synthesized, ivars in 1166/// super class and then collects all ivars, including those synthesized for 1167/// current class. This routine is used for implementation of current class 1168/// when all ivars, declared and synthesized are known. 1169/// 1170void ASTContext::DeepCollectObjCIvars(const ObjCInterfaceDecl *OI, 1171 bool leafClass, 1172 SmallVectorImpl<const ObjCIvarDecl*> &Ivars) const { 1173 if (const ObjCInterfaceDecl *SuperClass = OI->getSuperClass()) 1174 DeepCollectObjCIvars(SuperClass, false, Ivars); 1175 if (!leafClass) { 1176 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 1177 E = OI->ivar_end(); I != E; ++I) 1178 Ivars.push_back(*I); 1179 } else { 1180 ObjCInterfaceDecl *IDecl = const_cast<ObjCInterfaceDecl *>(OI); 1181 for (const ObjCIvarDecl *Iv = IDecl->all_declared_ivar_begin(); Iv; 1182 Iv= Iv->getNextIvar()) 1183 Ivars.push_back(Iv); 1184 } 1185} 1186 1187/// CollectInheritedProtocols - Collect all protocols in current class and 1188/// those inherited by it. 1189void ASTContext::CollectInheritedProtocols(const Decl *CDecl, 1190 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols) { 1191 if (const ObjCInterfaceDecl *OI = dyn_cast<ObjCInterfaceDecl>(CDecl)) { 1192 // We can use protocol_iterator here instead of 1193 // all_referenced_protocol_iterator since we are walking all categories. 1194 for (ObjCInterfaceDecl::all_protocol_iterator P = OI->all_referenced_protocol_begin(), 1195 PE = OI->all_referenced_protocol_end(); P != PE; ++P) { 1196 ObjCProtocolDecl *Proto = (*P); 1197 Protocols.insert(Proto->getCanonicalDecl()); 1198 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1199 PE = Proto->protocol_end(); P != PE; ++P) { 1200 Protocols.insert((*P)->getCanonicalDecl()); 1201 CollectInheritedProtocols(*P, Protocols); 1202 } 1203 } 1204 1205 // Categories of this Interface. 1206 for (const ObjCCategoryDecl *CDeclChain = OI->getCategoryList(); 1207 CDeclChain; CDeclChain = CDeclChain->getNextClassCategory()) 1208 CollectInheritedProtocols(CDeclChain, Protocols); 1209 if (ObjCInterfaceDecl *SD = OI->getSuperClass()) 1210 while (SD) { 1211 CollectInheritedProtocols(SD, Protocols); 1212 SD = SD->getSuperClass(); 1213 } 1214 } else if (const ObjCCategoryDecl *OC = dyn_cast<ObjCCategoryDecl>(CDecl)) { 1215 for (ObjCCategoryDecl::protocol_iterator P = OC->protocol_begin(), 1216 PE = OC->protocol_end(); P != PE; ++P) { 1217 ObjCProtocolDecl *Proto = (*P); 1218 Protocols.insert(Proto->getCanonicalDecl()); 1219 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1220 PE = Proto->protocol_end(); P != PE; ++P) 1221 CollectInheritedProtocols(*P, Protocols); 1222 } 1223 } else if (const ObjCProtocolDecl *OP = dyn_cast<ObjCProtocolDecl>(CDecl)) { 1224 for (ObjCProtocolDecl::protocol_iterator P = OP->protocol_begin(), 1225 PE = OP->protocol_end(); P != PE; ++P) { 1226 ObjCProtocolDecl *Proto = (*P); 1227 Protocols.insert(Proto->getCanonicalDecl()); 1228 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1229 PE = Proto->protocol_end(); P != PE; ++P) 1230 CollectInheritedProtocols(*P, Protocols); 1231 } 1232 } 1233} 1234 1235unsigned ASTContext::CountNonClassIvars(const ObjCInterfaceDecl *OI) const { 1236 unsigned count = 0; 1237 // Count ivars declared in class extension. 1238 for (const ObjCCategoryDecl *CDecl = OI->getFirstClassExtension(); CDecl; 1239 CDecl = CDecl->getNextClassExtension()) 1240 count += CDecl->ivar_size(); 1241 1242 // Count ivar defined in this class's implementation. This 1243 // includes synthesized ivars. 1244 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) 1245 count += ImplDecl->ivar_size(); 1246 1247 return count; 1248} 1249 1250bool ASTContext::isSentinelNullExpr(const Expr *E) { 1251 if (!E) 1252 return false; 1253 1254 // nullptr_t is always treated as null. 1255 if (E->getType()->isNullPtrType()) return true; 1256 1257 if (E->getType()->isAnyPointerType() && 1258 E->IgnoreParenCasts()->isNullPointerConstant(*this, 1259 Expr::NPC_ValueDependentIsNull)) 1260 return true; 1261 1262 // Unfortunately, __null has type 'int'. 1263 if (isa<GNUNullExpr>(E)) return true; 1264 1265 return false; 1266} 1267 1268/// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 1269ObjCImplementationDecl *ASTContext::getObjCImplementation(ObjCInterfaceDecl *D) { 1270 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 1271 I = ObjCImpls.find(D); 1272 if (I != ObjCImpls.end()) 1273 return cast<ObjCImplementationDecl>(I->second); 1274 return 0; 1275} 1276/// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 1277ObjCCategoryImplDecl *ASTContext::getObjCImplementation(ObjCCategoryDecl *D) { 1278 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 1279 I = ObjCImpls.find(D); 1280 if (I != ObjCImpls.end()) 1281 return cast<ObjCCategoryImplDecl>(I->second); 1282 return 0; 1283} 1284 1285/// \brief Set the implementation of ObjCInterfaceDecl. 1286void ASTContext::setObjCImplementation(ObjCInterfaceDecl *IFaceD, 1287 ObjCImplementationDecl *ImplD) { 1288 assert(IFaceD && ImplD && "Passed null params"); 1289 ObjCImpls[IFaceD] = ImplD; 1290} 1291/// \brief Set the implementation of ObjCCategoryDecl. 1292void ASTContext::setObjCImplementation(ObjCCategoryDecl *CatD, 1293 ObjCCategoryImplDecl *ImplD) { 1294 assert(CatD && ImplD && "Passed null params"); 1295 ObjCImpls[CatD] = ImplD; 1296} 1297 1298ObjCInterfaceDecl *ASTContext::getObjContainingInterface(NamedDecl *ND) const { 1299 if (ObjCInterfaceDecl *ID = dyn_cast<ObjCInterfaceDecl>(ND->getDeclContext())) 1300 return ID; 1301 if (ObjCCategoryDecl *CD = dyn_cast<ObjCCategoryDecl>(ND->getDeclContext())) 1302 return CD->getClassInterface(); 1303 if (ObjCImplDecl *IMD = dyn_cast<ObjCImplDecl>(ND->getDeclContext())) 1304 return IMD->getClassInterface(); 1305 1306 return 0; 1307} 1308 1309/// \brief Get the copy initialization expression of VarDecl,or NULL if 1310/// none exists. 1311Expr *ASTContext::getBlockVarCopyInits(const VarDecl*VD) { 1312 assert(VD && "Passed null params"); 1313 assert(VD->hasAttr<BlocksAttr>() && 1314 "getBlockVarCopyInits - not __block var"); 1315 llvm::DenseMap<const VarDecl*, Expr*>::iterator 1316 I = BlockVarCopyInits.find(VD); 1317 return (I != BlockVarCopyInits.end()) ? cast<Expr>(I->second) : 0; 1318} 1319 1320/// \brief Set the copy inialization expression of a block var decl. 1321void ASTContext::setBlockVarCopyInits(VarDecl*VD, Expr* Init) { 1322 assert(VD && Init && "Passed null params"); 1323 assert(VD->hasAttr<BlocksAttr>() && 1324 "setBlockVarCopyInits - not __block var"); 1325 BlockVarCopyInits[VD] = Init; 1326} 1327 1328/// \brief Allocate an uninitialized TypeSourceInfo. 1329/// 1330/// The caller should initialize the memory held by TypeSourceInfo using 1331/// the TypeLoc wrappers. 1332/// 1333/// \param T the type that will be the basis for type source info. This type 1334/// should refer to how the declarator was written in source code, not to 1335/// what type semantic analysis resolved the declarator to. 1336TypeSourceInfo *ASTContext::CreateTypeSourceInfo(QualType T, 1337 unsigned DataSize) const { 1338 if (!DataSize) 1339 DataSize = TypeLoc::getFullDataSizeForType(T); 1340 else 1341 assert(DataSize == TypeLoc::getFullDataSizeForType(T) && 1342 "incorrect data size provided to CreateTypeSourceInfo!"); 1343 1344 TypeSourceInfo *TInfo = 1345 (TypeSourceInfo*)BumpAlloc.Allocate(sizeof(TypeSourceInfo) + DataSize, 8); 1346 new (TInfo) TypeSourceInfo(T); 1347 return TInfo; 1348} 1349 1350TypeSourceInfo *ASTContext::getTrivialTypeSourceInfo(QualType T, 1351 SourceLocation L) const { 1352 TypeSourceInfo *DI = CreateTypeSourceInfo(T); 1353 DI->getTypeLoc().initialize(const_cast<ASTContext &>(*this), L); 1354 return DI; 1355} 1356 1357const ASTRecordLayout & 1358ASTContext::getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) const { 1359 return getObjCLayout(D, 0); 1360} 1361 1362const ASTRecordLayout & 1363ASTContext::getASTObjCImplementationLayout( 1364 const ObjCImplementationDecl *D) const { 1365 return getObjCLayout(D->getClassInterface(), D); 1366} 1367 1368//===----------------------------------------------------------------------===// 1369// Type creation/memoization methods 1370//===----------------------------------------------------------------------===// 1371 1372QualType 1373ASTContext::getExtQualType(const Type *baseType, Qualifiers quals) const { 1374 unsigned fastQuals = quals.getFastQualifiers(); 1375 quals.removeFastQualifiers(); 1376 1377 // Check if we've already instantiated this type. 1378 llvm::FoldingSetNodeID ID; 1379 ExtQuals::Profile(ID, baseType, quals); 1380 void *insertPos = 0; 1381 if (ExtQuals *eq = ExtQualNodes.FindNodeOrInsertPos(ID, insertPos)) { 1382 assert(eq->getQualifiers() == quals); 1383 return QualType(eq, fastQuals); 1384 } 1385 1386 // If the base type is not canonical, make the appropriate canonical type. 1387 QualType canon; 1388 if (!baseType->isCanonicalUnqualified()) { 1389 SplitQualType canonSplit = baseType->getCanonicalTypeInternal().split(); 1390 canonSplit.Quals.addConsistentQualifiers(quals); 1391 canon = getExtQualType(canonSplit.Ty, canonSplit.Quals); 1392 1393 // Re-find the insert position. 1394 (void) ExtQualNodes.FindNodeOrInsertPos(ID, insertPos); 1395 } 1396 1397 ExtQuals *eq = new (*this, TypeAlignment) ExtQuals(baseType, canon, quals); 1398 ExtQualNodes.InsertNode(eq, insertPos); 1399 return QualType(eq, fastQuals); 1400} 1401 1402QualType 1403ASTContext::getAddrSpaceQualType(QualType T, unsigned AddressSpace) const { 1404 QualType CanT = getCanonicalType(T); 1405 if (CanT.getAddressSpace() == AddressSpace) 1406 return T; 1407 1408 // If we are composing extended qualifiers together, merge together 1409 // into one ExtQuals node. 1410 QualifierCollector Quals; 1411 const Type *TypeNode = Quals.strip(T); 1412 1413 // If this type already has an address space specified, it cannot get 1414 // another one. 1415 assert(!Quals.hasAddressSpace() && 1416 "Type cannot be in multiple addr spaces!"); 1417 Quals.addAddressSpace(AddressSpace); 1418 1419 return getExtQualType(TypeNode, Quals); 1420} 1421 1422QualType ASTContext::getObjCGCQualType(QualType T, 1423 Qualifiers::GC GCAttr) const { 1424 QualType CanT = getCanonicalType(T); 1425 if (CanT.getObjCGCAttr() == GCAttr) 1426 return T; 1427 1428 if (const PointerType *ptr = T->getAs<PointerType>()) { 1429 QualType Pointee = ptr->getPointeeType(); 1430 if (Pointee->isAnyPointerType()) { 1431 QualType ResultType = getObjCGCQualType(Pointee, GCAttr); 1432 return getPointerType(ResultType); 1433 } 1434 } 1435 1436 // If we are composing extended qualifiers together, merge together 1437 // into one ExtQuals node. 1438 QualifierCollector Quals; 1439 const Type *TypeNode = Quals.strip(T); 1440 1441 // If this type already has an ObjCGC specified, it cannot get 1442 // another one. 1443 assert(!Quals.hasObjCGCAttr() && 1444 "Type cannot have multiple ObjCGCs!"); 1445 Quals.addObjCGCAttr(GCAttr); 1446 1447 return getExtQualType(TypeNode, Quals); 1448} 1449 1450const FunctionType *ASTContext::adjustFunctionType(const FunctionType *T, 1451 FunctionType::ExtInfo Info) { 1452 if (T->getExtInfo() == Info) 1453 return T; 1454 1455 QualType Result; 1456 if (const FunctionNoProtoType *FNPT = dyn_cast<FunctionNoProtoType>(T)) { 1457 Result = getFunctionNoProtoType(FNPT->getResultType(), Info); 1458 } else { 1459 const FunctionProtoType *FPT = cast<FunctionProtoType>(T); 1460 FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); 1461 EPI.ExtInfo = Info; 1462 Result = getFunctionType(FPT->getResultType(), FPT->arg_type_begin(), 1463 FPT->getNumArgs(), EPI); 1464 } 1465 1466 return cast<FunctionType>(Result.getTypePtr()); 1467} 1468 1469/// getComplexType - Return the uniqued reference to the type for a complex 1470/// number with the specified element type. 1471QualType ASTContext::getComplexType(QualType T) const { 1472 // Unique pointers, to guarantee there is only one pointer of a particular 1473 // structure. 1474 llvm::FoldingSetNodeID ID; 1475 ComplexType::Profile(ID, T); 1476 1477 void *InsertPos = 0; 1478 if (ComplexType *CT = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos)) 1479 return QualType(CT, 0); 1480 1481 // If the pointee type isn't canonical, this won't be a canonical type either, 1482 // so fill in the canonical type field. 1483 QualType Canonical; 1484 if (!T.isCanonical()) { 1485 Canonical = getComplexType(getCanonicalType(T)); 1486 1487 // Get the new insert position for the node we care about. 1488 ComplexType *NewIP = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos); 1489 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1490 } 1491 ComplexType *New = new (*this, TypeAlignment) ComplexType(T, Canonical); 1492 Types.push_back(New); 1493 ComplexTypes.InsertNode(New, InsertPos); 1494 return QualType(New, 0); 1495} 1496 1497/// getPointerType - Return the uniqued reference to the type for a pointer to 1498/// the specified type. 1499QualType ASTContext::getPointerType(QualType T) const { 1500 // Unique pointers, to guarantee there is only one pointer of a particular 1501 // structure. 1502 llvm::FoldingSetNodeID ID; 1503 PointerType::Profile(ID, T); 1504 1505 void *InsertPos = 0; 1506 if (PointerType *PT = PointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1507 return QualType(PT, 0); 1508 1509 // If the pointee type isn't canonical, this won't be a canonical type either, 1510 // so fill in the canonical type field. 1511 QualType Canonical; 1512 if (!T.isCanonical()) { 1513 Canonical = getPointerType(getCanonicalType(T)); 1514 1515 // Get the new insert position for the node we care about. 1516 PointerType *NewIP = PointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1517 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1518 } 1519 PointerType *New = new (*this, TypeAlignment) PointerType(T, Canonical); 1520 Types.push_back(New); 1521 PointerTypes.InsertNode(New, InsertPos); 1522 return QualType(New, 0); 1523} 1524 1525/// getBlockPointerType - Return the uniqued reference to the type for 1526/// a pointer to the specified block. 1527QualType ASTContext::getBlockPointerType(QualType T) const { 1528 assert(T->isFunctionType() && "block of function types only"); 1529 // Unique pointers, to guarantee there is only one block of a particular 1530 // structure. 1531 llvm::FoldingSetNodeID ID; 1532 BlockPointerType::Profile(ID, T); 1533 1534 void *InsertPos = 0; 1535 if (BlockPointerType *PT = 1536 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1537 return QualType(PT, 0); 1538 1539 // If the block pointee type isn't canonical, this won't be a canonical 1540 // type either so fill in the canonical type field. 1541 QualType Canonical; 1542 if (!T.isCanonical()) { 1543 Canonical = getBlockPointerType(getCanonicalType(T)); 1544 1545 // Get the new insert position for the node we care about. 1546 BlockPointerType *NewIP = 1547 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1548 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1549 } 1550 BlockPointerType *New 1551 = new (*this, TypeAlignment) BlockPointerType(T, Canonical); 1552 Types.push_back(New); 1553 BlockPointerTypes.InsertNode(New, InsertPos); 1554 return QualType(New, 0); 1555} 1556 1557/// getLValueReferenceType - Return the uniqued reference to the type for an 1558/// lvalue reference to the specified type. 1559QualType 1560ASTContext::getLValueReferenceType(QualType T, bool SpelledAsLValue) const { 1561 assert(getCanonicalType(T) != OverloadTy && 1562 "Unresolved overloaded function type"); 1563 1564 // Unique pointers, to guarantee there is only one pointer of a particular 1565 // structure. 1566 llvm::FoldingSetNodeID ID; 1567 ReferenceType::Profile(ID, T, SpelledAsLValue); 1568 1569 void *InsertPos = 0; 1570 if (LValueReferenceType *RT = 1571 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1572 return QualType(RT, 0); 1573 1574 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1575 1576 // If the referencee type isn't canonical, this won't be a canonical type 1577 // either, so fill in the canonical type field. 1578 QualType Canonical; 1579 if (!SpelledAsLValue || InnerRef || !T.isCanonical()) { 1580 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1581 Canonical = getLValueReferenceType(getCanonicalType(PointeeType)); 1582 1583 // Get the new insert position for the node we care about. 1584 LValueReferenceType *NewIP = 1585 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1586 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1587 } 1588 1589 LValueReferenceType *New 1590 = new (*this, TypeAlignment) LValueReferenceType(T, Canonical, 1591 SpelledAsLValue); 1592 Types.push_back(New); 1593 LValueReferenceTypes.InsertNode(New, InsertPos); 1594 1595 return QualType(New, 0); 1596} 1597 1598/// getRValueReferenceType - Return the uniqued reference to the type for an 1599/// rvalue reference to the specified type. 1600QualType ASTContext::getRValueReferenceType(QualType T) const { 1601 // Unique pointers, to guarantee there is only one pointer of a particular 1602 // structure. 1603 llvm::FoldingSetNodeID ID; 1604 ReferenceType::Profile(ID, T, false); 1605 1606 void *InsertPos = 0; 1607 if (RValueReferenceType *RT = 1608 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1609 return QualType(RT, 0); 1610 1611 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1612 1613 // If the referencee type isn't canonical, this won't be a canonical type 1614 // either, so fill in the canonical type field. 1615 QualType Canonical; 1616 if (InnerRef || !T.isCanonical()) { 1617 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1618 Canonical = getRValueReferenceType(getCanonicalType(PointeeType)); 1619 1620 // Get the new insert position for the node we care about. 1621 RValueReferenceType *NewIP = 1622 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1623 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1624 } 1625 1626 RValueReferenceType *New 1627 = new (*this, TypeAlignment) RValueReferenceType(T, Canonical); 1628 Types.push_back(New); 1629 RValueReferenceTypes.InsertNode(New, InsertPos); 1630 return QualType(New, 0); 1631} 1632 1633/// getMemberPointerType - Return the uniqued reference to the type for a 1634/// member pointer to the specified type, in the specified class. 1635QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls) const { 1636 // Unique pointers, to guarantee there is only one pointer of a particular 1637 // structure. 1638 llvm::FoldingSetNodeID ID; 1639 MemberPointerType::Profile(ID, T, Cls); 1640 1641 void *InsertPos = 0; 1642 if (MemberPointerType *PT = 1643 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1644 return QualType(PT, 0); 1645 1646 // If the pointee or class type isn't canonical, this won't be a canonical 1647 // type either, so fill in the canonical type field. 1648 QualType Canonical; 1649 if (!T.isCanonical() || !Cls->isCanonicalUnqualified()) { 1650 Canonical = getMemberPointerType(getCanonicalType(T),getCanonicalType(Cls)); 1651 1652 // Get the new insert position for the node we care about. 1653 MemberPointerType *NewIP = 1654 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1655 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1656 } 1657 MemberPointerType *New 1658 = new (*this, TypeAlignment) MemberPointerType(T, Cls, Canonical); 1659 Types.push_back(New); 1660 MemberPointerTypes.InsertNode(New, InsertPos); 1661 return QualType(New, 0); 1662} 1663 1664/// getConstantArrayType - Return the unique reference to the type for an 1665/// array of the specified element type. 1666QualType ASTContext::getConstantArrayType(QualType EltTy, 1667 const llvm::APInt &ArySizeIn, 1668 ArrayType::ArraySizeModifier ASM, 1669 unsigned IndexTypeQuals) const { 1670 assert((EltTy->isDependentType() || 1671 EltTy->isIncompleteType() || EltTy->isConstantSizeType()) && 1672 "Constant array of VLAs is illegal!"); 1673 1674 // Convert the array size into a canonical width matching the pointer size for 1675 // the target. 1676 llvm::APInt ArySize(ArySizeIn); 1677 ArySize = 1678 ArySize.zextOrTrunc(Target->getPointerWidth(getTargetAddressSpace(EltTy))); 1679 1680 llvm::FoldingSetNodeID ID; 1681 ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, IndexTypeQuals); 1682 1683 void *InsertPos = 0; 1684 if (ConstantArrayType *ATP = 1685 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1686 return QualType(ATP, 0); 1687 1688 // If the element type isn't canonical or has qualifiers, this won't 1689 // be a canonical type either, so fill in the canonical type field. 1690 QualType Canon; 1691 if (!EltTy.isCanonical() || EltTy.hasLocalQualifiers()) { 1692 SplitQualType canonSplit = getCanonicalType(EltTy).split(); 1693 Canon = getConstantArrayType(QualType(canonSplit.Ty, 0), ArySize, 1694 ASM, IndexTypeQuals); 1695 Canon = getQualifiedType(Canon, canonSplit.Quals); 1696 1697 // Get the new insert position for the node we care about. 1698 ConstantArrayType *NewIP = 1699 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1700 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1701 } 1702 1703 ConstantArrayType *New = new(*this,TypeAlignment) 1704 ConstantArrayType(EltTy, Canon, ArySize, ASM, IndexTypeQuals); 1705 ConstantArrayTypes.InsertNode(New, InsertPos); 1706 Types.push_back(New); 1707 return QualType(New, 0); 1708} 1709 1710/// getVariableArrayDecayedType - Turns the given type, which may be 1711/// variably-modified, into the corresponding type with all the known 1712/// sizes replaced with [*]. 1713QualType ASTContext::getVariableArrayDecayedType(QualType type) const { 1714 // Vastly most common case. 1715 if (!type->isVariablyModifiedType()) return type; 1716 1717 QualType result; 1718 1719 SplitQualType split = type.getSplitDesugaredType(); 1720 const Type *ty = split.Ty; 1721 switch (ty->getTypeClass()) { 1722#define TYPE(Class, Base) 1723#define ABSTRACT_TYPE(Class, Base) 1724#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 1725#include "clang/AST/TypeNodes.def" 1726 llvm_unreachable("didn't desugar past all non-canonical types?"); 1727 1728 // These types should never be variably-modified. 1729 case Type::Builtin: 1730 case Type::Complex: 1731 case Type::Vector: 1732 case Type::ExtVector: 1733 case Type::DependentSizedExtVector: 1734 case Type::ObjCObject: 1735 case Type::ObjCInterface: 1736 case Type::ObjCObjectPointer: 1737 case Type::Record: 1738 case Type::Enum: 1739 case Type::UnresolvedUsing: 1740 case Type::TypeOfExpr: 1741 case Type::TypeOf: 1742 case Type::Decltype: 1743 case Type::UnaryTransform: 1744 case Type::DependentName: 1745 case Type::InjectedClassName: 1746 case Type::TemplateSpecialization: 1747 case Type::DependentTemplateSpecialization: 1748 case Type::TemplateTypeParm: 1749 case Type::SubstTemplateTypeParmPack: 1750 case Type::Auto: 1751 case Type::PackExpansion: 1752 llvm_unreachable("type should never be variably-modified"); 1753 1754 // These types can be variably-modified but should never need to 1755 // further decay. 1756 case Type::FunctionNoProto: 1757 case Type::FunctionProto: 1758 case Type::BlockPointer: 1759 case Type::MemberPointer: 1760 return type; 1761 1762 // These types can be variably-modified. All these modifications 1763 // preserve structure except as noted by comments. 1764 // TODO: if we ever care about optimizing VLAs, there are no-op 1765 // optimizations available here. 1766 case Type::Pointer: 1767 result = getPointerType(getVariableArrayDecayedType( 1768 cast<PointerType>(ty)->getPointeeType())); 1769 break; 1770 1771 case Type::LValueReference: { 1772 const LValueReferenceType *lv = cast<LValueReferenceType>(ty); 1773 result = getLValueReferenceType( 1774 getVariableArrayDecayedType(lv->getPointeeType()), 1775 lv->isSpelledAsLValue()); 1776 break; 1777 } 1778 1779 case Type::RValueReference: { 1780 const RValueReferenceType *lv = cast<RValueReferenceType>(ty); 1781 result = getRValueReferenceType( 1782 getVariableArrayDecayedType(lv->getPointeeType())); 1783 break; 1784 } 1785 1786 case Type::Atomic: { 1787 const AtomicType *at = cast<AtomicType>(ty); 1788 result = getAtomicType(getVariableArrayDecayedType(at->getValueType())); 1789 break; 1790 } 1791 1792 case Type::ConstantArray: { 1793 const ConstantArrayType *cat = cast<ConstantArrayType>(ty); 1794 result = getConstantArrayType( 1795 getVariableArrayDecayedType(cat->getElementType()), 1796 cat->getSize(), 1797 cat->getSizeModifier(), 1798 cat->getIndexTypeCVRQualifiers()); 1799 break; 1800 } 1801 1802 case Type::DependentSizedArray: { 1803 const DependentSizedArrayType *dat = cast<DependentSizedArrayType>(ty); 1804 result = getDependentSizedArrayType( 1805 getVariableArrayDecayedType(dat->getElementType()), 1806 dat->getSizeExpr(), 1807 dat->getSizeModifier(), 1808 dat->getIndexTypeCVRQualifiers(), 1809 dat->getBracketsRange()); 1810 break; 1811 } 1812 1813 // Turn incomplete types into [*] types. 1814 case Type::IncompleteArray: { 1815 const IncompleteArrayType *iat = cast<IncompleteArrayType>(ty); 1816 result = getVariableArrayType( 1817 getVariableArrayDecayedType(iat->getElementType()), 1818 /*size*/ 0, 1819 ArrayType::Normal, 1820 iat->getIndexTypeCVRQualifiers(), 1821 SourceRange()); 1822 break; 1823 } 1824 1825 // Turn VLA types into [*] types. 1826 case Type::VariableArray: { 1827 const VariableArrayType *vat = cast<VariableArrayType>(ty); 1828 result = getVariableArrayType( 1829 getVariableArrayDecayedType(vat->getElementType()), 1830 /*size*/ 0, 1831 ArrayType::Star, 1832 vat->getIndexTypeCVRQualifiers(), 1833 vat->getBracketsRange()); 1834 break; 1835 } 1836 } 1837 1838 // Apply the top-level qualifiers from the original. 1839 return getQualifiedType(result, split.Quals); 1840} 1841 1842/// getVariableArrayType - Returns a non-unique reference to the type for a 1843/// variable array of the specified element type. 1844QualType ASTContext::getVariableArrayType(QualType EltTy, 1845 Expr *NumElts, 1846 ArrayType::ArraySizeModifier ASM, 1847 unsigned IndexTypeQuals, 1848 SourceRange Brackets) const { 1849 // Since we don't unique expressions, it isn't possible to unique VLA's 1850 // that have an expression provided for their size. 1851 QualType Canon; 1852 1853 // Be sure to pull qualifiers off the element type. 1854 if (!EltTy.isCanonical() || EltTy.hasLocalQualifiers()) { 1855 SplitQualType canonSplit = getCanonicalType(EltTy).split(); 1856 Canon = getVariableArrayType(QualType(canonSplit.Ty, 0), NumElts, ASM, 1857 IndexTypeQuals, Brackets); 1858 Canon = getQualifiedType(Canon, canonSplit.Quals); 1859 } 1860 1861 VariableArrayType *New = new(*this, TypeAlignment) 1862 VariableArrayType(EltTy, Canon, NumElts, ASM, IndexTypeQuals, Brackets); 1863 1864 VariableArrayTypes.push_back(New); 1865 Types.push_back(New); 1866 return QualType(New, 0); 1867} 1868 1869/// getDependentSizedArrayType - Returns a non-unique reference to 1870/// the type for a dependently-sized array of the specified element 1871/// type. 1872QualType ASTContext::getDependentSizedArrayType(QualType elementType, 1873 Expr *numElements, 1874 ArrayType::ArraySizeModifier ASM, 1875 unsigned elementTypeQuals, 1876 SourceRange brackets) const { 1877 assert((!numElements || numElements->isTypeDependent() || 1878 numElements->isValueDependent()) && 1879 "Size must be type- or value-dependent!"); 1880 1881 // Dependently-sized array types that do not have a specified number 1882 // of elements will have their sizes deduced from a dependent 1883 // initializer. We do no canonicalization here at all, which is okay 1884 // because they can't be used in most locations. 1885 if (!numElements) { 1886 DependentSizedArrayType *newType 1887 = new (*this, TypeAlignment) 1888 DependentSizedArrayType(*this, elementType, QualType(), 1889 numElements, ASM, elementTypeQuals, 1890 brackets); 1891 Types.push_back(newType); 1892 return QualType(newType, 0); 1893 } 1894 1895 // Otherwise, we actually build a new type every time, but we 1896 // also build a canonical type. 1897 1898 SplitQualType canonElementType = getCanonicalType(elementType).split(); 1899 1900 void *insertPos = 0; 1901 llvm::FoldingSetNodeID ID; 1902 DependentSizedArrayType::Profile(ID, *this, 1903 QualType(canonElementType.Ty, 0), 1904 ASM, elementTypeQuals, numElements); 1905 1906 // Look for an existing type with these properties. 1907 DependentSizedArrayType *canonTy = 1908 DependentSizedArrayTypes.FindNodeOrInsertPos(ID, insertPos); 1909 1910 // If we don't have one, build one. 1911 if (!canonTy) { 1912 canonTy = new (*this, TypeAlignment) 1913 DependentSizedArrayType(*this, QualType(canonElementType.Ty, 0), 1914 QualType(), numElements, ASM, elementTypeQuals, 1915 brackets); 1916 DependentSizedArrayTypes.InsertNode(canonTy, insertPos); 1917 Types.push_back(canonTy); 1918 } 1919 1920 // Apply qualifiers from the element type to the array. 1921 QualType canon = getQualifiedType(QualType(canonTy,0), 1922 canonElementType.Quals); 1923 1924 // If we didn't need extra canonicalization for the element type, 1925 // then just use that as our result. 1926 if (QualType(canonElementType.Ty, 0) == elementType) 1927 return canon; 1928 1929 // Otherwise, we need to build a type which follows the spelling 1930 // of the element type. 1931 DependentSizedArrayType *sugaredType 1932 = new (*this, TypeAlignment) 1933 DependentSizedArrayType(*this, elementType, canon, numElements, 1934 ASM, elementTypeQuals, brackets); 1935 Types.push_back(sugaredType); 1936 return QualType(sugaredType, 0); 1937} 1938 1939QualType ASTContext::getIncompleteArrayType(QualType elementType, 1940 ArrayType::ArraySizeModifier ASM, 1941 unsigned elementTypeQuals) const { 1942 llvm::FoldingSetNodeID ID; 1943 IncompleteArrayType::Profile(ID, elementType, ASM, elementTypeQuals); 1944 1945 void *insertPos = 0; 1946 if (IncompleteArrayType *iat = 1947 IncompleteArrayTypes.FindNodeOrInsertPos(ID, insertPos)) 1948 return QualType(iat, 0); 1949 1950 // If the element type isn't canonical, this won't be a canonical type 1951 // either, so fill in the canonical type field. We also have to pull 1952 // qualifiers off the element type. 1953 QualType canon; 1954 1955 if (!elementType.isCanonical() || elementType.hasLocalQualifiers()) { 1956 SplitQualType canonSplit = getCanonicalType(elementType).split(); 1957 canon = getIncompleteArrayType(QualType(canonSplit.Ty, 0), 1958 ASM, elementTypeQuals); 1959 canon = getQualifiedType(canon, canonSplit.Quals); 1960 1961 // Get the new insert position for the node we care about. 1962 IncompleteArrayType *existing = 1963 IncompleteArrayTypes.FindNodeOrInsertPos(ID, insertPos); 1964 assert(!existing && "Shouldn't be in the map!"); (void) existing; 1965 } 1966 1967 IncompleteArrayType *newType = new (*this, TypeAlignment) 1968 IncompleteArrayType(elementType, canon, ASM, elementTypeQuals); 1969 1970 IncompleteArrayTypes.InsertNode(newType, insertPos); 1971 Types.push_back(newType); 1972 return QualType(newType, 0); 1973} 1974 1975/// getVectorType - Return the unique reference to a vector type of 1976/// the specified element type and size. VectorType must be a built-in type. 1977QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts, 1978 VectorType::VectorKind VecKind) const { 1979 assert(vecType->isBuiltinType()); 1980 1981 // Check if we've already instantiated a vector of this type. 1982 llvm::FoldingSetNodeID ID; 1983 VectorType::Profile(ID, vecType, NumElts, Type::Vector, VecKind); 1984 1985 void *InsertPos = 0; 1986 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1987 return QualType(VTP, 0); 1988 1989 // If the element type isn't canonical, this won't be a canonical type either, 1990 // so fill in the canonical type field. 1991 QualType Canonical; 1992 if (!vecType.isCanonical()) { 1993 Canonical = getVectorType(getCanonicalType(vecType), NumElts, VecKind); 1994 1995 // Get the new insert position for the node we care about. 1996 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1997 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1998 } 1999 VectorType *New = new (*this, TypeAlignment) 2000 VectorType(vecType, NumElts, Canonical, VecKind); 2001 VectorTypes.InsertNode(New, InsertPos); 2002 Types.push_back(New); 2003 return QualType(New, 0); 2004} 2005 2006/// getExtVectorType - Return the unique reference to an extended vector type of 2007/// the specified element type and size. VectorType must be a built-in type. 2008QualType 2009ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) const { 2010 assert(vecType->isBuiltinType() || vecType->isDependentType()); 2011 2012 // Check if we've already instantiated a vector of this type. 2013 llvm::FoldingSetNodeID ID; 2014 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector, 2015 VectorType::GenericVector); 2016 void *InsertPos = 0; 2017 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 2018 return QualType(VTP, 0); 2019 2020 // If the element type isn't canonical, this won't be a canonical type either, 2021 // so fill in the canonical type field. 2022 QualType Canonical; 2023 if (!vecType.isCanonical()) { 2024 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts); 2025 2026 // Get the new insert position for the node we care about. 2027 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 2028 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 2029 } 2030 ExtVectorType *New = new (*this, TypeAlignment) 2031 ExtVectorType(vecType, NumElts, Canonical); 2032 VectorTypes.InsertNode(New, InsertPos); 2033 Types.push_back(New); 2034 return QualType(New, 0); 2035} 2036 2037QualType 2038ASTContext::getDependentSizedExtVectorType(QualType vecType, 2039 Expr *SizeExpr, 2040 SourceLocation AttrLoc) const { 2041 llvm::FoldingSetNodeID ID; 2042 DependentSizedExtVectorType::Profile(ID, *this, getCanonicalType(vecType), 2043 SizeExpr); 2044 2045 void *InsertPos = 0; 2046 DependentSizedExtVectorType *Canon 2047 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 2048 DependentSizedExtVectorType *New; 2049 if (Canon) { 2050 // We already have a canonical version of this array type; use it as 2051 // the canonical type for a newly-built type. 2052 New = new (*this, TypeAlignment) 2053 DependentSizedExtVectorType(*this, vecType, QualType(Canon, 0), 2054 SizeExpr, AttrLoc); 2055 } else { 2056 QualType CanonVecTy = getCanonicalType(vecType); 2057 if (CanonVecTy == vecType) { 2058 New = new (*this, TypeAlignment) 2059 DependentSizedExtVectorType(*this, vecType, QualType(), SizeExpr, 2060 AttrLoc); 2061 2062 DependentSizedExtVectorType *CanonCheck 2063 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 2064 assert(!CanonCheck && "Dependent-sized ext_vector canonical type broken"); 2065 (void)CanonCheck; 2066 DependentSizedExtVectorTypes.InsertNode(New, InsertPos); 2067 } else { 2068 QualType Canon = getDependentSizedExtVectorType(CanonVecTy, SizeExpr, 2069 SourceLocation()); 2070 New = new (*this, TypeAlignment) 2071 DependentSizedExtVectorType(*this, vecType, Canon, SizeExpr, AttrLoc); 2072 } 2073 } 2074 2075 Types.push_back(New); 2076 return QualType(New, 0); 2077} 2078 2079/// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 2080/// 2081QualType 2082ASTContext::getFunctionNoProtoType(QualType ResultTy, 2083 const FunctionType::ExtInfo &Info) const { 2084 const CallingConv DefaultCC = Info.getCC(); 2085 const CallingConv CallConv = (LangOpts.MRTD && DefaultCC == CC_Default) ? 2086 CC_X86StdCall : DefaultCC; 2087 // Unique functions, to guarantee there is only one function of a particular 2088 // structure. 2089 llvm::FoldingSetNodeID ID; 2090 FunctionNoProtoType::Profile(ID, ResultTy, Info); 2091 2092 void *InsertPos = 0; 2093 if (FunctionNoProtoType *FT = 2094 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 2095 return QualType(FT, 0); 2096 2097 QualType Canonical; 2098 if (!ResultTy.isCanonical() || 2099 getCanonicalCallConv(CallConv) != CallConv) { 2100 Canonical = 2101 getFunctionNoProtoType(getCanonicalType(ResultTy), 2102 Info.withCallingConv(getCanonicalCallConv(CallConv))); 2103 2104 // Get the new insert position for the node we care about. 2105 FunctionNoProtoType *NewIP = 2106 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 2107 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 2108 } 2109 2110 FunctionProtoType::ExtInfo newInfo = Info.withCallingConv(CallConv); 2111 FunctionNoProtoType *New = new (*this, TypeAlignment) 2112 FunctionNoProtoType(ResultTy, Canonical, newInfo); 2113 Types.push_back(New); 2114 FunctionNoProtoTypes.InsertNode(New, InsertPos); 2115 return QualType(New, 0); 2116} 2117 2118/// getFunctionType - Return a normal function type with a typed argument 2119/// list. isVariadic indicates whether the argument list includes '...'. 2120QualType 2121ASTContext::getFunctionType(QualType ResultTy, 2122 const QualType *ArgArray, unsigned NumArgs, 2123 const FunctionProtoType::ExtProtoInfo &EPI) const { 2124 // Unique functions, to guarantee there is only one function of a particular 2125 // structure. 2126 llvm::FoldingSetNodeID ID; 2127 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, EPI, *this); 2128 2129 void *InsertPos = 0; 2130 if (FunctionProtoType *FTP = 2131 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 2132 return QualType(FTP, 0); 2133 2134 // Determine whether the type being created is already canonical or not. 2135 bool isCanonical = 2136 EPI.ExceptionSpecType == EST_None && ResultTy.isCanonical() && 2137 !EPI.HasTrailingReturn; 2138 for (unsigned i = 0; i != NumArgs && isCanonical; ++i) 2139 if (!ArgArray[i].isCanonicalAsParam()) 2140 isCanonical = false; 2141 2142 const CallingConv DefaultCC = EPI.ExtInfo.getCC(); 2143 const CallingConv CallConv = (LangOpts.MRTD && DefaultCC == CC_Default) ? 2144 CC_X86StdCall : DefaultCC; 2145 2146 // If this type isn't canonical, get the canonical version of it. 2147 // The exception spec is not part of the canonical type. 2148 QualType Canonical; 2149 if (!isCanonical || getCanonicalCallConv(CallConv) != CallConv) { 2150 SmallVector<QualType, 16> CanonicalArgs; 2151 CanonicalArgs.reserve(NumArgs); 2152 for (unsigned i = 0; i != NumArgs; ++i) 2153 CanonicalArgs.push_back(getCanonicalParamType(ArgArray[i])); 2154 2155 FunctionProtoType::ExtProtoInfo CanonicalEPI = EPI; 2156 CanonicalEPI.HasTrailingReturn = false; 2157 CanonicalEPI.ExceptionSpecType = EST_None; 2158 CanonicalEPI.NumExceptions = 0; 2159 CanonicalEPI.ExtInfo 2160 = CanonicalEPI.ExtInfo.withCallingConv(getCanonicalCallConv(CallConv)); 2161 2162 Canonical = getFunctionType(getCanonicalType(ResultTy), 2163 CanonicalArgs.data(), NumArgs, 2164 CanonicalEPI); 2165 2166 // Get the new insert position for the node we care about. 2167 FunctionProtoType *NewIP = 2168 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 2169 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 2170 } 2171 2172 // FunctionProtoType objects are allocated with extra bytes after 2173 // them for three variable size arrays at the end: 2174 // - parameter types 2175 // - exception types 2176 // - consumed-arguments flags 2177 // Instead of the exception types, there could be a noexcept 2178 // expression. 2179 size_t Size = sizeof(FunctionProtoType) + 2180 NumArgs * sizeof(QualType); 2181 if (EPI.ExceptionSpecType == EST_Dynamic) 2182 Size += EPI.NumExceptions * sizeof(QualType); 2183 else if (EPI.ExceptionSpecType == EST_ComputedNoexcept) { 2184 Size += sizeof(Expr*); 2185 } 2186 if (EPI.ConsumedArguments) 2187 Size += NumArgs * sizeof(bool); 2188 2189 FunctionProtoType *FTP = (FunctionProtoType*) Allocate(Size, TypeAlignment); 2190 FunctionProtoType::ExtProtoInfo newEPI = EPI; 2191 newEPI.ExtInfo = EPI.ExtInfo.withCallingConv(CallConv); 2192 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, Canonical, newEPI); 2193 Types.push_back(FTP); 2194 FunctionProtoTypes.InsertNode(FTP, InsertPos); 2195 return QualType(FTP, 0); 2196} 2197 2198#ifndef NDEBUG 2199static bool NeedsInjectedClassNameType(const RecordDecl *D) { 2200 if (!isa<CXXRecordDecl>(D)) return false; 2201 const CXXRecordDecl *RD = cast<CXXRecordDecl>(D); 2202 if (isa<ClassTemplatePartialSpecializationDecl>(RD)) 2203 return true; 2204 if (RD->getDescribedClassTemplate() && 2205 !isa<ClassTemplateSpecializationDecl>(RD)) 2206 return true; 2207 return false; 2208} 2209#endif 2210 2211/// getInjectedClassNameType - Return the unique reference to the 2212/// injected class name type for the specified templated declaration. 2213QualType ASTContext::getInjectedClassNameType(CXXRecordDecl *Decl, 2214 QualType TST) const { 2215 assert(NeedsInjectedClassNameType(Decl)); 2216 if (Decl->TypeForDecl) { 2217 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 2218 } else if (CXXRecordDecl *PrevDecl = Decl->getPreviousDecl()) { 2219 assert(PrevDecl->TypeForDecl && "previous declaration has no type"); 2220 Decl->TypeForDecl = PrevDecl->TypeForDecl; 2221 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 2222 } else { 2223 Type *newType = 2224 new (*this, TypeAlignment) InjectedClassNameType(Decl, TST); 2225 Decl->TypeForDecl = newType; 2226 Types.push_back(newType); 2227 } 2228 return QualType(Decl->TypeForDecl, 0); 2229} 2230 2231/// getTypeDeclType - Return the unique reference to the type for the 2232/// specified type declaration. 2233QualType ASTContext::getTypeDeclTypeSlow(const TypeDecl *Decl) const { 2234 assert(Decl && "Passed null for Decl param"); 2235 assert(!Decl->TypeForDecl && "TypeForDecl present in slow case"); 2236 2237 if (const TypedefNameDecl *Typedef = dyn_cast<TypedefNameDecl>(Decl)) 2238 return getTypedefType(Typedef); 2239 2240 assert(!isa<TemplateTypeParmDecl>(Decl) && 2241 "Template type parameter types are always available."); 2242 2243 if (const RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) { 2244 assert(!Record->getPreviousDecl() && 2245 "struct/union has previous declaration"); 2246 assert(!NeedsInjectedClassNameType(Record)); 2247 return getRecordType(Record); 2248 } else if (const EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) { 2249 assert(!Enum->getPreviousDecl() && 2250 "enum has previous declaration"); 2251 return getEnumType(Enum); 2252 } else if (const UnresolvedUsingTypenameDecl *Using = 2253 dyn_cast<UnresolvedUsingTypenameDecl>(Decl)) { 2254 Type *newType = new (*this, TypeAlignment) UnresolvedUsingType(Using); 2255 Decl->TypeForDecl = newType; 2256 Types.push_back(newType); 2257 } else 2258 llvm_unreachable("TypeDecl without a type?"); 2259 2260 return QualType(Decl->TypeForDecl, 0); 2261} 2262 2263/// getTypedefType - Return the unique reference to the type for the 2264/// specified typedef name decl. 2265QualType 2266ASTContext::getTypedefType(const TypedefNameDecl *Decl, 2267 QualType Canonical) const { 2268 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2269 2270 if (Canonical.isNull()) 2271 Canonical = getCanonicalType(Decl->getUnderlyingType()); 2272 TypedefType *newType = new(*this, TypeAlignment) 2273 TypedefType(Type::Typedef, Decl, Canonical); 2274 Decl->TypeForDecl = newType; 2275 Types.push_back(newType); 2276 return QualType(newType, 0); 2277} 2278 2279QualType ASTContext::getRecordType(const RecordDecl *Decl) const { 2280 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2281 2282 if (const RecordDecl *PrevDecl = Decl->getPreviousDecl()) 2283 if (PrevDecl->TypeForDecl) 2284 return QualType(Decl->TypeForDecl = PrevDecl->TypeForDecl, 0); 2285 2286 RecordType *newType = new (*this, TypeAlignment) RecordType(Decl); 2287 Decl->TypeForDecl = newType; 2288 Types.push_back(newType); 2289 return QualType(newType, 0); 2290} 2291 2292QualType ASTContext::getEnumType(const EnumDecl *Decl) const { 2293 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2294 2295 if (const EnumDecl *PrevDecl = Decl->getPreviousDecl()) 2296 if (PrevDecl->TypeForDecl) 2297 return QualType(Decl->TypeForDecl = PrevDecl->TypeForDecl, 0); 2298 2299 EnumType *newType = new (*this, TypeAlignment) EnumType(Decl); 2300 Decl->TypeForDecl = newType; 2301 Types.push_back(newType); 2302 return QualType(newType, 0); 2303} 2304 2305QualType ASTContext::getAttributedType(AttributedType::Kind attrKind, 2306 QualType modifiedType, 2307 QualType equivalentType) { 2308 llvm::FoldingSetNodeID id; 2309 AttributedType::Profile(id, attrKind, modifiedType, equivalentType); 2310 2311 void *insertPos = 0; 2312 AttributedType *type = AttributedTypes.FindNodeOrInsertPos(id, insertPos); 2313 if (type) return QualType(type, 0); 2314 2315 QualType canon = getCanonicalType(equivalentType); 2316 type = new (*this, TypeAlignment) 2317 AttributedType(canon, attrKind, modifiedType, equivalentType); 2318 2319 Types.push_back(type); 2320 AttributedTypes.InsertNode(type, insertPos); 2321 2322 return QualType(type, 0); 2323} 2324 2325 2326/// \brief Retrieve a substitution-result type. 2327QualType 2328ASTContext::getSubstTemplateTypeParmType(const TemplateTypeParmType *Parm, 2329 QualType Replacement) const { 2330 assert(Replacement.isCanonical() 2331 && "replacement types must always be canonical"); 2332 2333 llvm::FoldingSetNodeID ID; 2334 SubstTemplateTypeParmType::Profile(ID, Parm, Replacement); 2335 void *InsertPos = 0; 2336 SubstTemplateTypeParmType *SubstParm 2337 = SubstTemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2338 2339 if (!SubstParm) { 2340 SubstParm = new (*this, TypeAlignment) 2341 SubstTemplateTypeParmType(Parm, Replacement); 2342 Types.push_back(SubstParm); 2343 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 2344 } 2345 2346 return QualType(SubstParm, 0); 2347} 2348 2349/// \brief Retrieve a 2350QualType ASTContext::getSubstTemplateTypeParmPackType( 2351 const TemplateTypeParmType *Parm, 2352 const TemplateArgument &ArgPack) { 2353#ifndef NDEBUG 2354 for (TemplateArgument::pack_iterator P = ArgPack.pack_begin(), 2355 PEnd = ArgPack.pack_end(); 2356 P != PEnd; ++P) { 2357 assert(P->getKind() == TemplateArgument::Type &&"Pack contains a non-type"); 2358 assert(P->getAsType().isCanonical() && "Pack contains non-canonical type"); 2359 } 2360#endif 2361 2362 llvm::FoldingSetNodeID ID; 2363 SubstTemplateTypeParmPackType::Profile(ID, Parm, ArgPack); 2364 void *InsertPos = 0; 2365 if (SubstTemplateTypeParmPackType *SubstParm 2366 = SubstTemplateTypeParmPackTypes.FindNodeOrInsertPos(ID, InsertPos)) 2367 return QualType(SubstParm, 0); 2368 2369 QualType Canon; 2370 if (!Parm->isCanonicalUnqualified()) { 2371 Canon = getCanonicalType(QualType(Parm, 0)); 2372 Canon = getSubstTemplateTypeParmPackType(cast<TemplateTypeParmType>(Canon), 2373 ArgPack); 2374 SubstTemplateTypeParmPackTypes.FindNodeOrInsertPos(ID, InsertPos); 2375 } 2376 2377 SubstTemplateTypeParmPackType *SubstParm 2378 = new (*this, TypeAlignment) SubstTemplateTypeParmPackType(Parm, Canon, 2379 ArgPack); 2380 Types.push_back(SubstParm); 2381 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 2382 return QualType(SubstParm, 0); 2383} 2384 2385/// \brief Retrieve the template type parameter type for a template 2386/// parameter or parameter pack with the given depth, index, and (optionally) 2387/// name. 2388QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index, 2389 bool ParameterPack, 2390 TemplateTypeParmDecl *TTPDecl) const { 2391 llvm::FoldingSetNodeID ID; 2392 TemplateTypeParmType::Profile(ID, Depth, Index, ParameterPack, TTPDecl); 2393 void *InsertPos = 0; 2394 TemplateTypeParmType *TypeParm 2395 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2396 2397 if (TypeParm) 2398 return QualType(TypeParm, 0); 2399 2400 if (TTPDecl) { 2401 QualType Canon = getTemplateTypeParmType(Depth, Index, ParameterPack); 2402 TypeParm = new (*this, TypeAlignment) TemplateTypeParmType(TTPDecl, Canon); 2403 2404 TemplateTypeParmType *TypeCheck 2405 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2406 assert(!TypeCheck && "Template type parameter canonical type broken"); 2407 (void)TypeCheck; 2408 } else 2409 TypeParm = new (*this, TypeAlignment) 2410 TemplateTypeParmType(Depth, Index, ParameterPack); 2411 2412 Types.push_back(TypeParm); 2413 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos); 2414 2415 return QualType(TypeParm, 0); 2416} 2417 2418TypeSourceInfo * 2419ASTContext::getTemplateSpecializationTypeInfo(TemplateName Name, 2420 SourceLocation NameLoc, 2421 const TemplateArgumentListInfo &Args, 2422 QualType Underlying) const { 2423 assert(!Name.getAsDependentTemplateName() && 2424 "No dependent template names here!"); 2425 QualType TST = getTemplateSpecializationType(Name, Args, Underlying); 2426 2427 TypeSourceInfo *DI = CreateTypeSourceInfo(TST); 2428 TemplateSpecializationTypeLoc TL 2429 = cast<TemplateSpecializationTypeLoc>(DI->getTypeLoc()); 2430 TL.setTemplateKeywordLoc(SourceLocation()); 2431 TL.setTemplateNameLoc(NameLoc); 2432 TL.setLAngleLoc(Args.getLAngleLoc()); 2433 TL.setRAngleLoc(Args.getRAngleLoc()); 2434 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 2435 TL.setArgLocInfo(i, Args[i].getLocInfo()); 2436 return DI; 2437} 2438 2439QualType 2440ASTContext::getTemplateSpecializationType(TemplateName Template, 2441 const TemplateArgumentListInfo &Args, 2442 QualType Underlying) const { 2443 assert(!Template.getAsDependentTemplateName() && 2444 "No dependent template names here!"); 2445 2446 unsigned NumArgs = Args.size(); 2447 2448 SmallVector<TemplateArgument, 4> ArgVec; 2449 ArgVec.reserve(NumArgs); 2450 for (unsigned i = 0; i != NumArgs; ++i) 2451 ArgVec.push_back(Args[i].getArgument()); 2452 2453 return getTemplateSpecializationType(Template, ArgVec.data(), NumArgs, 2454 Underlying); 2455} 2456 2457#ifndef NDEBUG 2458static bool hasAnyPackExpansions(const TemplateArgument *Args, 2459 unsigned NumArgs) { 2460 for (unsigned I = 0; I != NumArgs; ++I) 2461 if (Args[I].isPackExpansion()) 2462 return true; 2463 2464 return true; 2465} 2466#endif 2467 2468QualType 2469ASTContext::getTemplateSpecializationType(TemplateName Template, 2470 const TemplateArgument *Args, 2471 unsigned NumArgs, 2472 QualType Underlying) const { 2473 assert(!Template.getAsDependentTemplateName() && 2474 "No dependent template names here!"); 2475 // Look through qualified template names. 2476 if (QualifiedTemplateName *QTN = Template.getAsQualifiedTemplateName()) 2477 Template = TemplateName(QTN->getTemplateDecl()); 2478 2479 bool IsTypeAlias = 2480 Template.getAsTemplateDecl() && 2481 isa<TypeAliasTemplateDecl>(Template.getAsTemplateDecl()); 2482 QualType CanonType; 2483 if (!Underlying.isNull()) 2484 CanonType = getCanonicalType(Underlying); 2485 else { 2486 // We can get here with an alias template when the specialization contains 2487 // a pack expansion that does not match up with a parameter pack. 2488 assert((!IsTypeAlias || hasAnyPackExpansions(Args, NumArgs)) && 2489 "Caller must compute aliased type"); 2490 IsTypeAlias = false; 2491 CanonType = getCanonicalTemplateSpecializationType(Template, Args, 2492 NumArgs); 2493 } 2494 2495 // Allocate the (non-canonical) template specialization type, but don't 2496 // try to unique it: these types typically have location information that 2497 // we don't unique and don't want to lose. 2498 void *Mem = Allocate(sizeof(TemplateSpecializationType) + 2499 sizeof(TemplateArgument) * NumArgs + 2500 (IsTypeAlias? sizeof(QualType) : 0), 2501 TypeAlignment); 2502 TemplateSpecializationType *Spec 2503 = new (Mem) TemplateSpecializationType(Template, Args, NumArgs, CanonType, 2504 IsTypeAlias ? Underlying : QualType()); 2505 2506 Types.push_back(Spec); 2507 return QualType(Spec, 0); 2508} 2509 2510QualType 2511ASTContext::getCanonicalTemplateSpecializationType(TemplateName Template, 2512 const TemplateArgument *Args, 2513 unsigned NumArgs) const { 2514 assert(!Template.getAsDependentTemplateName() && 2515 "No dependent template names here!"); 2516 2517 // Look through qualified template names. 2518 if (QualifiedTemplateName *QTN = Template.getAsQualifiedTemplateName()) 2519 Template = TemplateName(QTN->getTemplateDecl()); 2520 2521 // Build the canonical template specialization type. 2522 TemplateName CanonTemplate = getCanonicalTemplateName(Template); 2523 SmallVector<TemplateArgument, 4> CanonArgs; 2524 CanonArgs.reserve(NumArgs); 2525 for (unsigned I = 0; I != NumArgs; ++I) 2526 CanonArgs.push_back(getCanonicalTemplateArgument(Args[I])); 2527 2528 // Determine whether this canonical template specialization type already 2529 // exists. 2530 llvm::FoldingSetNodeID ID; 2531 TemplateSpecializationType::Profile(ID, CanonTemplate, 2532 CanonArgs.data(), NumArgs, *this); 2533 2534 void *InsertPos = 0; 2535 TemplateSpecializationType *Spec 2536 = TemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2537 2538 if (!Spec) { 2539 // Allocate a new canonical template specialization type. 2540 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 2541 sizeof(TemplateArgument) * NumArgs), 2542 TypeAlignment); 2543 Spec = new (Mem) TemplateSpecializationType(CanonTemplate, 2544 CanonArgs.data(), NumArgs, 2545 QualType(), QualType()); 2546 Types.push_back(Spec); 2547 TemplateSpecializationTypes.InsertNode(Spec, InsertPos); 2548 } 2549 2550 assert(Spec->isDependentType() && 2551 "Non-dependent template-id type must have a canonical type"); 2552 return QualType(Spec, 0); 2553} 2554 2555QualType 2556ASTContext::getElaboratedType(ElaboratedTypeKeyword Keyword, 2557 NestedNameSpecifier *NNS, 2558 QualType NamedType) const { 2559 llvm::FoldingSetNodeID ID; 2560 ElaboratedType::Profile(ID, Keyword, NNS, NamedType); 2561 2562 void *InsertPos = 0; 2563 ElaboratedType *T = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2564 if (T) 2565 return QualType(T, 0); 2566 2567 QualType Canon = NamedType; 2568 if (!Canon.isCanonical()) { 2569 Canon = getCanonicalType(NamedType); 2570 ElaboratedType *CheckT = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2571 assert(!CheckT && "Elaborated canonical type broken"); 2572 (void)CheckT; 2573 } 2574 2575 T = new (*this) ElaboratedType(Keyword, NNS, NamedType, Canon); 2576 Types.push_back(T); 2577 ElaboratedTypes.InsertNode(T, InsertPos); 2578 return QualType(T, 0); 2579} 2580 2581QualType 2582ASTContext::getParenType(QualType InnerType) const { 2583 llvm::FoldingSetNodeID ID; 2584 ParenType::Profile(ID, InnerType); 2585 2586 void *InsertPos = 0; 2587 ParenType *T = ParenTypes.FindNodeOrInsertPos(ID, InsertPos); 2588 if (T) 2589 return QualType(T, 0); 2590 2591 QualType Canon = InnerType; 2592 if (!Canon.isCanonical()) { 2593 Canon = getCanonicalType(InnerType); 2594 ParenType *CheckT = ParenTypes.FindNodeOrInsertPos(ID, InsertPos); 2595 assert(!CheckT && "Paren canonical type broken"); 2596 (void)CheckT; 2597 } 2598 2599 T = new (*this) ParenType(InnerType, Canon); 2600 Types.push_back(T); 2601 ParenTypes.InsertNode(T, InsertPos); 2602 return QualType(T, 0); 2603} 2604 2605QualType ASTContext::getDependentNameType(ElaboratedTypeKeyword Keyword, 2606 NestedNameSpecifier *NNS, 2607 const IdentifierInfo *Name, 2608 QualType Canon) const { 2609 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 2610 2611 if (Canon.isNull()) { 2612 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2613 ElaboratedTypeKeyword CanonKeyword = Keyword; 2614 if (Keyword == ETK_None) 2615 CanonKeyword = ETK_Typename; 2616 2617 if (CanonNNS != NNS || CanonKeyword != Keyword) 2618 Canon = getDependentNameType(CanonKeyword, CanonNNS, Name); 2619 } 2620 2621 llvm::FoldingSetNodeID ID; 2622 DependentNameType::Profile(ID, Keyword, NNS, Name); 2623 2624 void *InsertPos = 0; 2625 DependentNameType *T 2626 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 2627 if (T) 2628 return QualType(T, 0); 2629 2630 T = new (*this) DependentNameType(Keyword, NNS, Name, Canon); 2631 Types.push_back(T); 2632 DependentNameTypes.InsertNode(T, InsertPos); 2633 return QualType(T, 0); 2634} 2635 2636QualType 2637ASTContext::getDependentTemplateSpecializationType( 2638 ElaboratedTypeKeyword Keyword, 2639 NestedNameSpecifier *NNS, 2640 const IdentifierInfo *Name, 2641 const TemplateArgumentListInfo &Args) const { 2642 // TODO: avoid this copy 2643 SmallVector<TemplateArgument, 16> ArgCopy; 2644 for (unsigned I = 0, E = Args.size(); I != E; ++I) 2645 ArgCopy.push_back(Args[I].getArgument()); 2646 return getDependentTemplateSpecializationType(Keyword, NNS, Name, 2647 ArgCopy.size(), 2648 ArgCopy.data()); 2649} 2650 2651QualType 2652ASTContext::getDependentTemplateSpecializationType( 2653 ElaboratedTypeKeyword Keyword, 2654 NestedNameSpecifier *NNS, 2655 const IdentifierInfo *Name, 2656 unsigned NumArgs, 2657 const TemplateArgument *Args) const { 2658 assert((!NNS || NNS->isDependent()) && 2659 "nested-name-specifier must be dependent"); 2660 2661 llvm::FoldingSetNodeID ID; 2662 DependentTemplateSpecializationType::Profile(ID, *this, Keyword, NNS, 2663 Name, NumArgs, Args); 2664 2665 void *InsertPos = 0; 2666 DependentTemplateSpecializationType *T 2667 = DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2668 if (T) 2669 return QualType(T, 0); 2670 2671 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2672 2673 ElaboratedTypeKeyword CanonKeyword = Keyword; 2674 if (Keyword == ETK_None) CanonKeyword = ETK_Typename; 2675 2676 bool AnyNonCanonArgs = false; 2677 SmallVector<TemplateArgument, 16> CanonArgs(NumArgs); 2678 for (unsigned I = 0; I != NumArgs; ++I) { 2679 CanonArgs[I] = getCanonicalTemplateArgument(Args[I]); 2680 if (!CanonArgs[I].structurallyEquals(Args[I])) 2681 AnyNonCanonArgs = true; 2682 } 2683 2684 QualType Canon; 2685 if (AnyNonCanonArgs || CanonNNS != NNS || CanonKeyword != Keyword) { 2686 Canon = getDependentTemplateSpecializationType(CanonKeyword, CanonNNS, 2687 Name, NumArgs, 2688 CanonArgs.data()); 2689 2690 // Find the insert position again. 2691 DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2692 } 2693 2694 void *Mem = Allocate((sizeof(DependentTemplateSpecializationType) + 2695 sizeof(TemplateArgument) * NumArgs), 2696 TypeAlignment); 2697 T = new (Mem) DependentTemplateSpecializationType(Keyword, NNS, 2698 Name, NumArgs, Args, Canon); 2699 Types.push_back(T); 2700 DependentTemplateSpecializationTypes.InsertNode(T, InsertPos); 2701 return QualType(T, 0); 2702} 2703 2704QualType ASTContext::getPackExpansionType(QualType Pattern, 2705 llvm::Optional<unsigned> NumExpansions) { 2706 llvm::FoldingSetNodeID ID; 2707 PackExpansionType::Profile(ID, Pattern, NumExpansions); 2708 2709 assert(Pattern->containsUnexpandedParameterPack() && 2710 "Pack expansions must expand one or more parameter packs"); 2711 void *InsertPos = 0; 2712 PackExpansionType *T 2713 = PackExpansionTypes.FindNodeOrInsertPos(ID, InsertPos); 2714 if (T) 2715 return QualType(T, 0); 2716 2717 QualType Canon; 2718 if (!Pattern.isCanonical()) { 2719 Canon = getPackExpansionType(getCanonicalType(Pattern), NumExpansions); 2720 2721 // Find the insert position again. 2722 PackExpansionTypes.FindNodeOrInsertPos(ID, InsertPos); 2723 } 2724 2725 T = new (*this) PackExpansionType(Pattern, Canon, NumExpansions); 2726 Types.push_back(T); 2727 PackExpansionTypes.InsertNode(T, InsertPos); 2728 return QualType(T, 0); 2729} 2730 2731/// CmpProtocolNames - Comparison predicate for sorting protocols 2732/// alphabetically. 2733static bool CmpProtocolNames(const ObjCProtocolDecl *LHS, 2734 const ObjCProtocolDecl *RHS) { 2735 return LHS->getDeclName() < RHS->getDeclName(); 2736} 2737 2738static bool areSortedAndUniqued(ObjCProtocolDecl * const *Protocols, 2739 unsigned NumProtocols) { 2740 if (NumProtocols == 0) return true; 2741 2742 if (Protocols[0]->getCanonicalDecl() != Protocols[0]) 2743 return false; 2744 2745 for (unsigned i = 1; i != NumProtocols; ++i) 2746 if (!CmpProtocolNames(Protocols[i-1], Protocols[i]) || 2747 Protocols[i]->getCanonicalDecl() != Protocols[i]) 2748 return false; 2749 return true; 2750} 2751 2752static void SortAndUniqueProtocols(ObjCProtocolDecl **Protocols, 2753 unsigned &NumProtocols) { 2754 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols; 2755 2756 // Sort protocols, keyed by name. 2757 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames); 2758 2759 // Canonicalize. 2760 for (unsigned I = 0, N = NumProtocols; I != N; ++I) 2761 Protocols[I] = Protocols[I]->getCanonicalDecl(); 2762 2763 // Remove duplicates. 2764 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd); 2765 NumProtocols = ProtocolsEnd-Protocols; 2766} 2767 2768QualType ASTContext::getObjCObjectType(QualType BaseType, 2769 ObjCProtocolDecl * const *Protocols, 2770 unsigned NumProtocols) const { 2771 // If the base type is an interface and there aren't any protocols 2772 // to add, then the interface type will do just fine. 2773 if (!NumProtocols && isa<ObjCInterfaceType>(BaseType)) 2774 return BaseType; 2775 2776 // Look in the folding set for an existing type. 2777 llvm::FoldingSetNodeID ID; 2778 ObjCObjectTypeImpl::Profile(ID, BaseType, Protocols, NumProtocols); 2779 void *InsertPos = 0; 2780 if (ObjCObjectType *QT = ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos)) 2781 return QualType(QT, 0); 2782 2783 // Build the canonical type, which has the canonical base type and 2784 // a sorted-and-uniqued list of protocols. 2785 QualType Canonical; 2786 bool ProtocolsSorted = areSortedAndUniqued(Protocols, NumProtocols); 2787 if (!ProtocolsSorted || !BaseType.isCanonical()) { 2788 if (!ProtocolsSorted) { 2789 SmallVector<ObjCProtocolDecl*, 8> Sorted(Protocols, 2790 Protocols + NumProtocols); 2791 unsigned UniqueCount = NumProtocols; 2792 2793 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2794 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2795 &Sorted[0], UniqueCount); 2796 } else { 2797 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2798 Protocols, NumProtocols); 2799 } 2800 2801 // Regenerate InsertPos. 2802 ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos); 2803 } 2804 2805 unsigned Size = sizeof(ObjCObjectTypeImpl); 2806 Size += NumProtocols * sizeof(ObjCProtocolDecl *); 2807 void *Mem = Allocate(Size, TypeAlignment); 2808 ObjCObjectTypeImpl *T = 2809 new (Mem) ObjCObjectTypeImpl(Canonical, BaseType, Protocols, NumProtocols); 2810 2811 Types.push_back(T); 2812 ObjCObjectTypes.InsertNode(T, InsertPos); 2813 return QualType(T, 0); 2814} 2815 2816/// getObjCObjectPointerType - Return a ObjCObjectPointerType type for 2817/// the given object type. 2818QualType ASTContext::getObjCObjectPointerType(QualType ObjectT) const { 2819 llvm::FoldingSetNodeID ID; 2820 ObjCObjectPointerType::Profile(ID, ObjectT); 2821 2822 void *InsertPos = 0; 2823 if (ObjCObjectPointerType *QT = 2824 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 2825 return QualType(QT, 0); 2826 2827 // Find the canonical object type. 2828 QualType Canonical; 2829 if (!ObjectT.isCanonical()) { 2830 Canonical = getObjCObjectPointerType(getCanonicalType(ObjectT)); 2831 2832 // Regenerate InsertPos. 2833 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 2834 } 2835 2836 // No match. 2837 void *Mem = Allocate(sizeof(ObjCObjectPointerType), TypeAlignment); 2838 ObjCObjectPointerType *QType = 2839 new (Mem) ObjCObjectPointerType(Canonical, ObjectT); 2840 2841 Types.push_back(QType); 2842 ObjCObjectPointerTypes.InsertNode(QType, InsertPos); 2843 return QualType(QType, 0); 2844} 2845 2846/// getObjCInterfaceType - Return the unique reference to the type for the 2847/// specified ObjC interface decl. The list of protocols is optional. 2848QualType ASTContext::getObjCInterfaceType(const ObjCInterfaceDecl *Decl, 2849 ObjCInterfaceDecl *PrevDecl) const { 2850 if (Decl->TypeForDecl) 2851 return QualType(Decl->TypeForDecl, 0); 2852 2853 if (PrevDecl) { 2854 assert(PrevDecl->TypeForDecl && "previous decl has no TypeForDecl"); 2855 Decl->TypeForDecl = PrevDecl->TypeForDecl; 2856 return QualType(PrevDecl->TypeForDecl, 0); 2857 } 2858 2859 // Prefer the definition, if there is one. 2860 if (const ObjCInterfaceDecl *Def = Decl->getDefinition()) 2861 Decl = Def; 2862 2863 void *Mem = Allocate(sizeof(ObjCInterfaceType), TypeAlignment); 2864 ObjCInterfaceType *T = new (Mem) ObjCInterfaceType(Decl); 2865 Decl->TypeForDecl = T; 2866 Types.push_back(T); 2867 return QualType(T, 0); 2868} 2869 2870/// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique 2871/// TypeOfExprType AST's (since expression's are never shared). For example, 2872/// multiple declarations that refer to "typeof(x)" all contain different 2873/// DeclRefExpr's. This doesn't effect the type checker, since it operates 2874/// on canonical type's (which are always unique). 2875QualType ASTContext::getTypeOfExprType(Expr *tofExpr) const { 2876 TypeOfExprType *toe; 2877 if (tofExpr->isTypeDependent()) { 2878 llvm::FoldingSetNodeID ID; 2879 DependentTypeOfExprType::Profile(ID, *this, tofExpr); 2880 2881 void *InsertPos = 0; 2882 DependentTypeOfExprType *Canon 2883 = DependentTypeOfExprTypes.FindNodeOrInsertPos(ID, InsertPos); 2884 if (Canon) { 2885 // We already have a "canonical" version of an identical, dependent 2886 // typeof(expr) type. Use that as our canonical type. 2887 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, 2888 QualType((TypeOfExprType*)Canon, 0)); 2889 } else { 2890 // Build a new, canonical typeof(expr) type. 2891 Canon 2892 = new (*this, TypeAlignment) DependentTypeOfExprType(*this, tofExpr); 2893 DependentTypeOfExprTypes.InsertNode(Canon, InsertPos); 2894 toe = Canon; 2895 } 2896 } else { 2897 QualType Canonical = getCanonicalType(tofExpr->getType()); 2898 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, Canonical); 2899 } 2900 Types.push_back(toe); 2901 return QualType(toe, 0); 2902} 2903 2904/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique 2905/// TypeOfType AST's. The only motivation to unique these nodes would be 2906/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be 2907/// an issue. This doesn't effect the type checker, since it operates 2908/// on canonical type's (which are always unique). 2909QualType ASTContext::getTypeOfType(QualType tofType) const { 2910 QualType Canonical = getCanonicalType(tofType); 2911 TypeOfType *tot = new (*this, TypeAlignment) TypeOfType(tofType, Canonical); 2912 Types.push_back(tot); 2913 return QualType(tot, 0); 2914} 2915 2916 2917/// getDecltypeType - Unlike many "get<Type>" functions, we don't unique 2918/// DecltypeType AST's. The only motivation to unique these nodes would be 2919/// memory savings. Since decltype(t) is fairly uncommon, space shouldn't be 2920/// an issue. This doesn't effect the type checker, since it operates 2921/// on canonical types (which are always unique). 2922QualType ASTContext::getDecltypeType(Expr *e, QualType UnderlyingType) const { 2923 DecltypeType *dt; 2924 2925 // C++0x [temp.type]p2: 2926 // If an expression e involves a template parameter, decltype(e) denotes a 2927 // unique dependent type. Two such decltype-specifiers refer to the same 2928 // type only if their expressions are equivalent (14.5.6.1). 2929 if (e->isInstantiationDependent()) { 2930 llvm::FoldingSetNodeID ID; 2931 DependentDecltypeType::Profile(ID, *this, e); 2932 2933 void *InsertPos = 0; 2934 DependentDecltypeType *Canon 2935 = DependentDecltypeTypes.FindNodeOrInsertPos(ID, InsertPos); 2936 if (Canon) { 2937 // We already have a "canonical" version of an equivalent, dependent 2938 // decltype type. Use that as our canonical type. 2939 dt = new (*this, TypeAlignment) DecltypeType(e, DependentTy, 2940 QualType((DecltypeType*)Canon, 0)); 2941 } else { 2942 // Build a new, canonical typeof(expr) type. 2943 Canon = new (*this, TypeAlignment) DependentDecltypeType(*this, e); 2944 DependentDecltypeTypes.InsertNode(Canon, InsertPos); 2945 dt = Canon; 2946 } 2947 } else { 2948 dt = new (*this, TypeAlignment) DecltypeType(e, UnderlyingType, 2949 getCanonicalType(UnderlyingType)); 2950 } 2951 Types.push_back(dt); 2952 return QualType(dt, 0); 2953} 2954 2955/// getUnaryTransformationType - We don't unique these, since the memory 2956/// savings are minimal and these are rare. 2957QualType ASTContext::getUnaryTransformType(QualType BaseType, 2958 QualType UnderlyingType, 2959 UnaryTransformType::UTTKind Kind) 2960 const { 2961 UnaryTransformType *Ty = 2962 new (*this, TypeAlignment) UnaryTransformType (BaseType, UnderlyingType, 2963 Kind, 2964 UnderlyingType->isDependentType() ? 2965 QualType() : getCanonicalType(UnderlyingType)); 2966 Types.push_back(Ty); 2967 return QualType(Ty, 0); 2968} 2969 2970/// getAutoType - We only unique auto types after they've been deduced. 2971QualType ASTContext::getAutoType(QualType DeducedType) const { 2972 void *InsertPos = 0; 2973 if (!DeducedType.isNull()) { 2974 // Look in the folding set for an existing type. 2975 llvm::FoldingSetNodeID ID; 2976 AutoType::Profile(ID, DeducedType); 2977 if (AutoType *AT = AutoTypes.FindNodeOrInsertPos(ID, InsertPos)) 2978 return QualType(AT, 0); 2979 } 2980 2981 AutoType *AT = new (*this, TypeAlignment) AutoType(DeducedType); 2982 Types.push_back(AT); 2983 if (InsertPos) 2984 AutoTypes.InsertNode(AT, InsertPos); 2985 return QualType(AT, 0); 2986} 2987 2988/// getAtomicType - Return the uniqued reference to the atomic type for 2989/// the given value type. 2990QualType ASTContext::getAtomicType(QualType T) const { 2991 // Unique pointers, to guarantee there is only one pointer of a particular 2992 // structure. 2993 llvm::FoldingSetNodeID ID; 2994 AtomicType::Profile(ID, T); 2995 2996 void *InsertPos = 0; 2997 if (AtomicType *AT = AtomicTypes.FindNodeOrInsertPos(ID, InsertPos)) 2998 return QualType(AT, 0); 2999 3000 // If the atomic value type isn't canonical, this won't be a canonical type 3001 // either, so fill in the canonical type field. 3002 QualType Canonical; 3003 if (!T.isCanonical()) { 3004 Canonical = getAtomicType(getCanonicalType(T)); 3005 3006 // Get the new insert position for the node we care about. 3007 AtomicType *NewIP = AtomicTypes.FindNodeOrInsertPos(ID, InsertPos); 3008 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 3009 } 3010 AtomicType *New = new (*this, TypeAlignment) AtomicType(T, Canonical); 3011 Types.push_back(New); 3012 AtomicTypes.InsertNode(New, InsertPos); 3013 return QualType(New, 0); 3014} 3015 3016/// getAutoDeductType - Get type pattern for deducing against 'auto'. 3017QualType ASTContext::getAutoDeductType() const { 3018 if (AutoDeductTy.isNull()) 3019 AutoDeductTy = getAutoType(QualType()); 3020 assert(!AutoDeductTy.isNull() && "can't build 'auto' pattern"); 3021 return AutoDeductTy; 3022} 3023 3024/// getAutoRRefDeductType - Get type pattern for deducing against 'auto &&'. 3025QualType ASTContext::getAutoRRefDeductType() const { 3026 if (AutoRRefDeductTy.isNull()) 3027 AutoRRefDeductTy = getRValueReferenceType(getAutoDeductType()); 3028 assert(!AutoRRefDeductTy.isNull() && "can't build 'auto &&' pattern"); 3029 return AutoRRefDeductTy; 3030} 3031 3032/// getTagDeclType - Return the unique reference to the type for the 3033/// specified TagDecl (struct/union/class/enum) decl. 3034QualType ASTContext::getTagDeclType(const TagDecl *Decl) const { 3035 assert (Decl); 3036 // FIXME: What is the design on getTagDeclType when it requires casting 3037 // away const? mutable? 3038 return getTypeDeclType(const_cast<TagDecl*>(Decl)); 3039} 3040 3041/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result 3042/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and 3043/// needs to agree with the definition in <stddef.h>. 3044CanQualType ASTContext::getSizeType() const { 3045 return getFromTargetType(Target->getSizeType()); 3046} 3047 3048/// getIntMaxType - Return the unique type for "intmax_t" (C99 7.18.1.5). 3049CanQualType ASTContext::getIntMaxType() const { 3050 return getFromTargetType(Target->getIntMaxType()); 3051} 3052 3053/// getUIntMaxType - Return the unique type for "uintmax_t" (C99 7.18.1.5). 3054CanQualType ASTContext::getUIntMaxType() const { 3055 return getFromTargetType(Target->getUIntMaxType()); 3056} 3057 3058/// getSignedWCharType - Return the type of "signed wchar_t". 3059/// Used when in C++, as a GCC extension. 3060QualType ASTContext::getSignedWCharType() const { 3061 // FIXME: derive from "Target" ? 3062 return WCharTy; 3063} 3064 3065/// getUnsignedWCharType - Return the type of "unsigned wchar_t". 3066/// Used when in C++, as a GCC extension. 3067QualType ASTContext::getUnsignedWCharType() const { 3068 // FIXME: derive from "Target" ? 3069 return UnsignedIntTy; 3070} 3071 3072/// getPointerDiffType - Return the unique type for "ptrdiff_t" (C99 7.17) 3073/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 3074QualType ASTContext::getPointerDiffType() const { 3075 return getFromTargetType(Target->getPtrDiffType(0)); 3076} 3077 3078//===----------------------------------------------------------------------===// 3079// Type Operators 3080//===----------------------------------------------------------------------===// 3081 3082CanQualType ASTContext::getCanonicalParamType(QualType T) const { 3083 // Push qualifiers into arrays, and then discard any remaining 3084 // qualifiers. 3085 T = getCanonicalType(T); 3086 T = getVariableArrayDecayedType(T); 3087 const Type *Ty = T.getTypePtr(); 3088 QualType Result; 3089 if (isa<ArrayType>(Ty)) { 3090 Result = getArrayDecayedType(QualType(Ty,0)); 3091 } else if (isa<FunctionType>(Ty)) { 3092 Result = getPointerType(QualType(Ty, 0)); 3093 } else { 3094 Result = QualType(Ty, 0); 3095 } 3096 3097 return CanQualType::CreateUnsafe(Result); 3098} 3099 3100QualType ASTContext::getUnqualifiedArrayType(QualType type, 3101 Qualifiers &quals) { 3102 SplitQualType splitType = type.getSplitUnqualifiedType(); 3103 3104 // FIXME: getSplitUnqualifiedType() actually walks all the way to 3105 // the unqualified desugared type and then drops it on the floor. 3106 // We then have to strip that sugar back off with 3107 // getUnqualifiedDesugaredType(), which is silly. 3108 const ArrayType *AT = 3109 dyn_cast<ArrayType>(splitType.Ty->getUnqualifiedDesugaredType()); 3110 3111 // If we don't have an array, just use the results in splitType. 3112 if (!AT) { 3113 quals = splitType.Quals; 3114 return QualType(splitType.Ty, 0); 3115 } 3116 3117 // Otherwise, recurse on the array's element type. 3118 QualType elementType = AT->getElementType(); 3119 QualType unqualElementType = getUnqualifiedArrayType(elementType, quals); 3120 3121 // If that didn't change the element type, AT has no qualifiers, so we 3122 // can just use the results in splitType. 3123 if (elementType == unqualElementType) { 3124 assert(quals.empty()); // from the recursive call 3125 quals = splitType.Quals; 3126 return QualType(splitType.Ty, 0); 3127 } 3128 3129 // Otherwise, add in the qualifiers from the outermost type, then 3130 // build the type back up. 3131 quals.addConsistentQualifiers(splitType.Quals); 3132 3133 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) { 3134 return getConstantArrayType(unqualElementType, CAT->getSize(), 3135 CAT->getSizeModifier(), 0); 3136 } 3137 3138 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) { 3139 return getIncompleteArrayType(unqualElementType, IAT->getSizeModifier(), 0); 3140 } 3141 3142 if (const VariableArrayType *VAT = dyn_cast<VariableArrayType>(AT)) { 3143 return getVariableArrayType(unqualElementType, 3144 VAT->getSizeExpr(), 3145 VAT->getSizeModifier(), 3146 VAT->getIndexTypeCVRQualifiers(), 3147 VAT->getBracketsRange()); 3148 } 3149 3150 const DependentSizedArrayType *DSAT = cast<DependentSizedArrayType>(AT); 3151 return getDependentSizedArrayType(unqualElementType, DSAT->getSizeExpr(), 3152 DSAT->getSizeModifier(), 0, 3153 SourceRange()); 3154} 3155 3156/// UnwrapSimilarPointerTypes - If T1 and T2 are pointer types that 3157/// may be similar (C++ 4.4), replaces T1 and T2 with the type that 3158/// they point to and return true. If T1 and T2 aren't pointer types 3159/// or pointer-to-member types, or if they are not similar at this 3160/// level, returns false and leaves T1 and T2 unchanged. Top-level 3161/// qualifiers on T1 and T2 are ignored. This function will typically 3162/// be called in a loop that successively "unwraps" pointer and 3163/// pointer-to-member types to compare them at each level. 3164bool ASTContext::UnwrapSimilarPointerTypes(QualType &T1, QualType &T2) { 3165 const PointerType *T1PtrType = T1->getAs<PointerType>(), 3166 *T2PtrType = T2->getAs<PointerType>(); 3167 if (T1PtrType && T2PtrType) { 3168 T1 = T1PtrType->getPointeeType(); 3169 T2 = T2PtrType->getPointeeType(); 3170 return true; 3171 } 3172 3173 const MemberPointerType *T1MPType = T1->getAs<MemberPointerType>(), 3174 *T2MPType = T2->getAs<MemberPointerType>(); 3175 if (T1MPType && T2MPType && 3176 hasSameUnqualifiedType(QualType(T1MPType->getClass(), 0), 3177 QualType(T2MPType->getClass(), 0))) { 3178 T1 = T1MPType->getPointeeType(); 3179 T2 = T2MPType->getPointeeType(); 3180 return true; 3181 } 3182 3183 if (getLangOptions().ObjC1) { 3184 const ObjCObjectPointerType *T1OPType = T1->getAs<ObjCObjectPointerType>(), 3185 *T2OPType = T2->getAs<ObjCObjectPointerType>(); 3186 if (T1OPType && T2OPType) { 3187 T1 = T1OPType->getPointeeType(); 3188 T2 = T2OPType->getPointeeType(); 3189 return true; 3190 } 3191 } 3192 3193 // FIXME: Block pointers, too? 3194 3195 return false; 3196} 3197 3198DeclarationNameInfo 3199ASTContext::getNameForTemplate(TemplateName Name, 3200 SourceLocation NameLoc) const { 3201 switch (Name.getKind()) { 3202 case TemplateName::QualifiedTemplate: 3203 case TemplateName::Template: 3204 // DNInfo work in progress: CHECKME: what about DNLoc? 3205 return DeclarationNameInfo(Name.getAsTemplateDecl()->getDeclName(), 3206 NameLoc); 3207 3208 case TemplateName::OverloadedTemplate: { 3209 OverloadedTemplateStorage *Storage = Name.getAsOverloadedTemplate(); 3210 // DNInfo work in progress: CHECKME: what about DNLoc? 3211 return DeclarationNameInfo((*Storage->begin())->getDeclName(), NameLoc); 3212 } 3213 3214 case TemplateName::DependentTemplate: { 3215 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 3216 DeclarationName DName; 3217 if (DTN->isIdentifier()) { 3218 DName = DeclarationNames.getIdentifier(DTN->getIdentifier()); 3219 return DeclarationNameInfo(DName, NameLoc); 3220 } else { 3221 DName = DeclarationNames.getCXXOperatorName(DTN->getOperator()); 3222 // DNInfo work in progress: FIXME: source locations? 3223 DeclarationNameLoc DNLoc; 3224 DNLoc.CXXOperatorName.BeginOpNameLoc = SourceLocation().getRawEncoding(); 3225 DNLoc.CXXOperatorName.EndOpNameLoc = SourceLocation().getRawEncoding(); 3226 return DeclarationNameInfo(DName, NameLoc, DNLoc); 3227 } 3228 } 3229 3230 case TemplateName::SubstTemplateTemplateParm: { 3231 SubstTemplateTemplateParmStorage *subst 3232 = Name.getAsSubstTemplateTemplateParm(); 3233 return DeclarationNameInfo(subst->getParameter()->getDeclName(), 3234 NameLoc); 3235 } 3236 3237 case TemplateName::SubstTemplateTemplateParmPack: { 3238 SubstTemplateTemplateParmPackStorage *subst 3239 = Name.getAsSubstTemplateTemplateParmPack(); 3240 return DeclarationNameInfo(subst->getParameterPack()->getDeclName(), 3241 NameLoc); 3242 } 3243 } 3244 3245 llvm_unreachable("bad template name kind!"); 3246} 3247 3248TemplateName ASTContext::getCanonicalTemplateName(TemplateName Name) const { 3249 switch (Name.getKind()) { 3250 case TemplateName::QualifiedTemplate: 3251 case TemplateName::Template: { 3252 TemplateDecl *Template = Name.getAsTemplateDecl(); 3253 if (TemplateTemplateParmDecl *TTP 3254 = dyn_cast<TemplateTemplateParmDecl>(Template)) 3255 Template = getCanonicalTemplateTemplateParmDecl(TTP); 3256 3257 // The canonical template name is the canonical template declaration. 3258 return TemplateName(cast<TemplateDecl>(Template->getCanonicalDecl())); 3259 } 3260 3261 case TemplateName::OverloadedTemplate: 3262 llvm_unreachable("cannot canonicalize overloaded template"); 3263 3264 case TemplateName::DependentTemplate: { 3265 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 3266 assert(DTN && "Non-dependent template names must refer to template decls."); 3267 return DTN->CanonicalTemplateName; 3268 } 3269 3270 case TemplateName::SubstTemplateTemplateParm: { 3271 SubstTemplateTemplateParmStorage *subst 3272 = Name.getAsSubstTemplateTemplateParm(); 3273 return getCanonicalTemplateName(subst->getReplacement()); 3274 } 3275 3276 case TemplateName::SubstTemplateTemplateParmPack: { 3277 SubstTemplateTemplateParmPackStorage *subst 3278 = Name.getAsSubstTemplateTemplateParmPack(); 3279 TemplateTemplateParmDecl *canonParameter 3280 = getCanonicalTemplateTemplateParmDecl(subst->getParameterPack()); 3281 TemplateArgument canonArgPack 3282 = getCanonicalTemplateArgument(subst->getArgumentPack()); 3283 return getSubstTemplateTemplateParmPack(canonParameter, canonArgPack); 3284 } 3285 } 3286 3287 llvm_unreachable("bad template name!"); 3288} 3289 3290bool ASTContext::hasSameTemplateName(TemplateName X, TemplateName Y) { 3291 X = getCanonicalTemplateName(X); 3292 Y = getCanonicalTemplateName(Y); 3293 return X.getAsVoidPointer() == Y.getAsVoidPointer(); 3294} 3295 3296TemplateArgument 3297ASTContext::getCanonicalTemplateArgument(const TemplateArgument &Arg) const { 3298 switch (Arg.getKind()) { 3299 case TemplateArgument::Null: 3300 return Arg; 3301 3302 case TemplateArgument::Expression: 3303 return Arg; 3304 3305 case TemplateArgument::Declaration: 3306 return TemplateArgument(Arg.getAsDecl()->getCanonicalDecl()); 3307 3308 case TemplateArgument::Template: 3309 return TemplateArgument(getCanonicalTemplateName(Arg.getAsTemplate())); 3310 3311 case TemplateArgument::TemplateExpansion: 3312 return TemplateArgument(getCanonicalTemplateName( 3313 Arg.getAsTemplateOrTemplatePattern()), 3314 Arg.getNumTemplateExpansions()); 3315 3316 case TemplateArgument::Integral: 3317 return TemplateArgument(*Arg.getAsIntegral(), 3318 getCanonicalType(Arg.getIntegralType())); 3319 3320 case TemplateArgument::Type: 3321 return TemplateArgument(getCanonicalType(Arg.getAsType())); 3322 3323 case TemplateArgument::Pack: { 3324 if (Arg.pack_size() == 0) 3325 return Arg; 3326 3327 TemplateArgument *CanonArgs 3328 = new (*this) TemplateArgument[Arg.pack_size()]; 3329 unsigned Idx = 0; 3330 for (TemplateArgument::pack_iterator A = Arg.pack_begin(), 3331 AEnd = Arg.pack_end(); 3332 A != AEnd; (void)++A, ++Idx) 3333 CanonArgs[Idx] = getCanonicalTemplateArgument(*A); 3334 3335 return TemplateArgument(CanonArgs, Arg.pack_size()); 3336 } 3337 } 3338 3339 // Silence GCC warning 3340 llvm_unreachable("Unhandled template argument kind"); 3341} 3342 3343NestedNameSpecifier * 3344ASTContext::getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) const { 3345 if (!NNS) 3346 return 0; 3347 3348 switch (NNS->getKind()) { 3349 case NestedNameSpecifier::Identifier: 3350 // Canonicalize the prefix but keep the identifier the same. 3351 return NestedNameSpecifier::Create(*this, 3352 getCanonicalNestedNameSpecifier(NNS->getPrefix()), 3353 NNS->getAsIdentifier()); 3354 3355 case NestedNameSpecifier::Namespace: 3356 // A namespace is canonical; build a nested-name-specifier with 3357 // this namespace and no prefix. 3358 return NestedNameSpecifier::Create(*this, 0, 3359 NNS->getAsNamespace()->getOriginalNamespace()); 3360 3361 case NestedNameSpecifier::NamespaceAlias: 3362 // A namespace is canonical; build a nested-name-specifier with 3363 // this namespace and no prefix. 3364 return NestedNameSpecifier::Create(*this, 0, 3365 NNS->getAsNamespaceAlias()->getNamespace() 3366 ->getOriginalNamespace()); 3367 3368 case NestedNameSpecifier::TypeSpec: 3369 case NestedNameSpecifier::TypeSpecWithTemplate: { 3370 QualType T = getCanonicalType(QualType(NNS->getAsType(), 0)); 3371 3372 // If we have some kind of dependent-named type (e.g., "typename T::type"), 3373 // break it apart into its prefix and identifier, then reconsititute those 3374 // as the canonical nested-name-specifier. This is required to canonicalize 3375 // a dependent nested-name-specifier involving typedefs of dependent-name 3376 // types, e.g., 3377 // typedef typename T::type T1; 3378 // typedef typename T1::type T2; 3379 if (const DependentNameType *DNT = T->getAs<DependentNameType>()) 3380 return NestedNameSpecifier::Create(*this, DNT->getQualifier(), 3381 const_cast<IdentifierInfo *>(DNT->getIdentifier())); 3382 3383 // Otherwise, just canonicalize the type, and force it to be a TypeSpec. 3384 // FIXME: Why are TypeSpec and TypeSpecWithTemplate distinct in the 3385 // first place? 3386 return NestedNameSpecifier::Create(*this, 0, false, 3387 const_cast<Type*>(T.getTypePtr())); 3388 } 3389 3390 case NestedNameSpecifier::Global: 3391 // The global specifier is canonical and unique. 3392 return NNS; 3393 } 3394 3395 llvm_unreachable("Invalid NestedNameSpecifier::Kind!"); 3396} 3397 3398 3399const ArrayType *ASTContext::getAsArrayType(QualType T) const { 3400 // Handle the non-qualified case efficiently. 3401 if (!T.hasLocalQualifiers()) { 3402 // Handle the common positive case fast. 3403 if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 3404 return AT; 3405 } 3406 3407 // Handle the common negative case fast. 3408 if (!isa<ArrayType>(T.getCanonicalType())) 3409 return 0; 3410 3411 // Apply any qualifiers from the array type to the element type. This 3412 // implements C99 6.7.3p8: "If the specification of an array type includes 3413 // any type qualifiers, the element type is so qualified, not the array type." 3414 3415 // If we get here, we either have type qualifiers on the type, or we have 3416 // sugar such as a typedef in the way. If we have type qualifiers on the type 3417 // we must propagate them down into the element type. 3418 3419 SplitQualType split = T.getSplitDesugaredType(); 3420 Qualifiers qs = split.Quals; 3421 3422 // If we have a simple case, just return now. 3423 const ArrayType *ATy = dyn_cast<ArrayType>(split.Ty); 3424 if (ATy == 0 || qs.empty()) 3425 return ATy; 3426 3427 // Otherwise, we have an array and we have qualifiers on it. Push the 3428 // qualifiers into the array element type and return a new array type. 3429 QualType NewEltTy = getQualifiedType(ATy->getElementType(), qs); 3430 3431 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy)) 3432 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(), 3433 CAT->getSizeModifier(), 3434 CAT->getIndexTypeCVRQualifiers())); 3435 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy)) 3436 return cast<ArrayType>(getIncompleteArrayType(NewEltTy, 3437 IAT->getSizeModifier(), 3438 IAT->getIndexTypeCVRQualifiers())); 3439 3440 if (const DependentSizedArrayType *DSAT 3441 = dyn_cast<DependentSizedArrayType>(ATy)) 3442 return cast<ArrayType>( 3443 getDependentSizedArrayType(NewEltTy, 3444 DSAT->getSizeExpr(), 3445 DSAT->getSizeModifier(), 3446 DSAT->getIndexTypeCVRQualifiers(), 3447 DSAT->getBracketsRange())); 3448 3449 const VariableArrayType *VAT = cast<VariableArrayType>(ATy); 3450 return cast<ArrayType>(getVariableArrayType(NewEltTy, 3451 VAT->getSizeExpr(), 3452 VAT->getSizeModifier(), 3453 VAT->getIndexTypeCVRQualifiers(), 3454 VAT->getBracketsRange())); 3455} 3456 3457QualType ASTContext::getAdjustedParameterType(QualType T) { 3458 // C99 6.7.5.3p7: 3459 // A declaration of a parameter as "array of type" shall be 3460 // adjusted to "qualified pointer to type", where the type 3461 // qualifiers (if any) are those specified within the [ and ] of 3462 // the array type derivation. 3463 if (T->isArrayType()) 3464 return getArrayDecayedType(T); 3465 3466 // C99 6.7.5.3p8: 3467 // A declaration of a parameter as "function returning type" 3468 // shall be adjusted to "pointer to function returning type", as 3469 // in 6.3.2.1. 3470 if (T->isFunctionType()) 3471 return getPointerType(T); 3472 3473 return T; 3474} 3475 3476QualType ASTContext::getSignatureParameterType(QualType T) { 3477 T = getVariableArrayDecayedType(T); 3478 T = getAdjustedParameterType(T); 3479 return T.getUnqualifiedType(); 3480} 3481 3482/// getArrayDecayedType - Return the properly qualified result of decaying the 3483/// specified array type to a pointer. This operation is non-trivial when 3484/// handling typedefs etc. The canonical type of "T" must be an array type, 3485/// this returns a pointer to a properly qualified element of the array. 3486/// 3487/// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 3488QualType ASTContext::getArrayDecayedType(QualType Ty) const { 3489 // Get the element type with 'getAsArrayType' so that we don't lose any 3490 // typedefs in the element type of the array. This also handles propagation 3491 // of type qualifiers from the array type into the element type if present 3492 // (C99 6.7.3p8). 3493 const ArrayType *PrettyArrayType = getAsArrayType(Ty); 3494 assert(PrettyArrayType && "Not an array type!"); 3495 3496 QualType PtrTy = getPointerType(PrettyArrayType->getElementType()); 3497 3498 // int x[restrict 4] -> int *restrict 3499 return getQualifiedType(PtrTy, PrettyArrayType->getIndexTypeQualifiers()); 3500} 3501 3502QualType ASTContext::getBaseElementType(const ArrayType *array) const { 3503 return getBaseElementType(array->getElementType()); 3504} 3505 3506QualType ASTContext::getBaseElementType(QualType type) const { 3507 Qualifiers qs; 3508 while (true) { 3509 SplitQualType split = type.getSplitDesugaredType(); 3510 const ArrayType *array = split.Ty->getAsArrayTypeUnsafe(); 3511 if (!array) break; 3512 3513 type = array->getElementType(); 3514 qs.addConsistentQualifiers(split.Quals); 3515 } 3516 3517 return getQualifiedType(type, qs); 3518} 3519 3520/// getConstantArrayElementCount - Returns number of constant array elements. 3521uint64_t 3522ASTContext::getConstantArrayElementCount(const ConstantArrayType *CA) const { 3523 uint64_t ElementCount = 1; 3524 do { 3525 ElementCount *= CA->getSize().getZExtValue(); 3526 CA = dyn_cast<ConstantArrayType>(CA->getElementType()); 3527 } while (CA); 3528 return ElementCount; 3529} 3530 3531/// getFloatingRank - Return a relative rank for floating point types. 3532/// This routine will assert if passed a built-in type that isn't a float. 3533static FloatingRank getFloatingRank(QualType T) { 3534 if (const ComplexType *CT = T->getAs<ComplexType>()) 3535 return getFloatingRank(CT->getElementType()); 3536 3537 assert(T->getAs<BuiltinType>() && "getFloatingRank(): not a floating type"); 3538 switch (T->getAs<BuiltinType>()->getKind()) { 3539 default: llvm_unreachable("getFloatingRank(): not a floating type"); 3540 case BuiltinType::Half: return HalfRank; 3541 case BuiltinType::Float: return FloatRank; 3542 case BuiltinType::Double: return DoubleRank; 3543 case BuiltinType::LongDouble: return LongDoubleRank; 3544 } 3545} 3546 3547/// getFloatingTypeOfSizeWithinDomain - Returns a real floating 3548/// point or a complex type (based on typeDomain/typeSize). 3549/// 'typeDomain' is a real floating point or complex type. 3550/// 'typeSize' is a real floating point or complex type. 3551QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size, 3552 QualType Domain) const { 3553 FloatingRank EltRank = getFloatingRank(Size); 3554 if (Domain->isComplexType()) { 3555 switch (EltRank) { 3556 case HalfRank: llvm_unreachable("Complex half is not supported"); 3557 case FloatRank: return FloatComplexTy; 3558 case DoubleRank: return DoubleComplexTy; 3559 case LongDoubleRank: return LongDoubleComplexTy; 3560 } 3561 } 3562 3563 assert(Domain->isRealFloatingType() && "Unknown domain!"); 3564 switch (EltRank) { 3565 case HalfRank: llvm_unreachable("Half ranks are not valid here"); 3566 case FloatRank: return FloatTy; 3567 case DoubleRank: return DoubleTy; 3568 case LongDoubleRank: return LongDoubleTy; 3569 } 3570 llvm_unreachable("getFloatingRank(): illegal value for rank"); 3571} 3572 3573/// getFloatingTypeOrder - Compare the rank of the two specified floating 3574/// point types, ignoring the domain of the type (i.e. 'double' == 3575/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 3576/// LHS < RHS, return -1. 3577int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) const { 3578 FloatingRank LHSR = getFloatingRank(LHS); 3579 FloatingRank RHSR = getFloatingRank(RHS); 3580 3581 if (LHSR == RHSR) 3582 return 0; 3583 if (LHSR > RHSR) 3584 return 1; 3585 return -1; 3586} 3587 3588/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This 3589/// routine will assert if passed a built-in type that isn't an integer or enum, 3590/// or if it is not canonicalized. 3591unsigned ASTContext::getIntegerRank(const Type *T) const { 3592 assert(T->isCanonicalUnqualified() && "T should be canonicalized"); 3593 3594 switch (cast<BuiltinType>(T)->getKind()) { 3595 default: llvm_unreachable("getIntegerRank(): not a built-in integer"); 3596 case BuiltinType::Bool: 3597 return 1 + (getIntWidth(BoolTy) << 3); 3598 case BuiltinType::Char_S: 3599 case BuiltinType::Char_U: 3600 case BuiltinType::SChar: 3601 case BuiltinType::UChar: 3602 return 2 + (getIntWidth(CharTy) << 3); 3603 case BuiltinType::Short: 3604 case BuiltinType::UShort: 3605 return 3 + (getIntWidth(ShortTy) << 3); 3606 case BuiltinType::Int: 3607 case BuiltinType::UInt: 3608 return 4 + (getIntWidth(IntTy) << 3); 3609 case BuiltinType::Long: 3610 case BuiltinType::ULong: 3611 return 5 + (getIntWidth(LongTy) << 3); 3612 case BuiltinType::LongLong: 3613 case BuiltinType::ULongLong: 3614 return 6 + (getIntWidth(LongLongTy) << 3); 3615 case BuiltinType::Int128: 3616 case BuiltinType::UInt128: 3617 return 7 + (getIntWidth(Int128Ty) << 3); 3618 } 3619} 3620 3621/// \brief Whether this is a promotable bitfield reference according 3622/// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 3623/// 3624/// \returns the type this bit-field will promote to, or NULL if no 3625/// promotion occurs. 3626QualType ASTContext::isPromotableBitField(Expr *E) const { 3627 if (E->isTypeDependent() || E->isValueDependent()) 3628 return QualType(); 3629 3630 FieldDecl *Field = E->getBitField(); 3631 if (!Field) 3632 return QualType(); 3633 3634 QualType FT = Field->getType(); 3635 3636 uint64_t BitWidth = Field->getBitWidthValue(*this); 3637 uint64_t IntSize = getTypeSize(IntTy); 3638 // GCC extension compatibility: if the bit-field size is less than or equal 3639 // to the size of int, it gets promoted no matter what its type is. 3640 // For instance, unsigned long bf : 4 gets promoted to signed int. 3641 if (BitWidth < IntSize) 3642 return IntTy; 3643 3644 if (BitWidth == IntSize) 3645 return FT->isSignedIntegerType() ? IntTy : UnsignedIntTy; 3646 3647 // Types bigger than int are not subject to promotions, and therefore act 3648 // like the base type. 3649 // FIXME: This doesn't quite match what gcc does, but what gcc does here 3650 // is ridiculous. 3651 return QualType(); 3652} 3653 3654/// getPromotedIntegerType - Returns the type that Promotable will 3655/// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 3656/// integer type. 3657QualType ASTContext::getPromotedIntegerType(QualType Promotable) const { 3658 assert(!Promotable.isNull()); 3659 assert(Promotable->isPromotableIntegerType()); 3660 if (const EnumType *ET = Promotable->getAs<EnumType>()) 3661 return ET->getDecl()->getPromotionType(); 3662 3663 if (const BuiltinType *BT = Promotable->getAs<BuiltinType>()) { 3664 // C++ [conv.prom]: A prvalue of type char16_t, char32_t, or wchar_t 3665 // (3.9.1) can be converted to a prvalue of the first of the following 3666 // types that can represent all the values of its underlying type: 3667 // int, unsigned int, long int, unsigned long int, long long int, or 3668 // unsigned long long int [...] 3669 // FIXME: Is there some better way to compute this? 3670 if (BT->getKind() == BuiltinType::WChar_S || 3671 BT->getKind() == BuiltinType::WChar_U || 3672 BT->getKind() == BuiltinType::Char16 || 3673 BT->getKind() == BuiltinType::Char32) { 3674 bool FromIsSigned = BT->getKind() == BuiltinType::WChar_S; 3675 uint64_t FromSize = getTypeSize(BT); 3676 QualType PromoteTypes[] = { IntTy, UnsignedIntTy, LongTy, UnsignedLongTy, 3677 LongLongTy, UnsignedLongLongTy }; 3678 for (size_t Idx = 0; Idx < llvm::array_lengthof(PromoteTypes); ++Idx) { 3679 uint64_t ToSize = getTypeSize(PromoteTypes[Idx]); 3680 if (FromSize < ToSize || 3681 (FromSize == ToSize && 3682 FromIsSigned == PromoteTypes[Idx]->isSignedIntegerType())) 3683 return PromoteTypes[Idx]; 3684 } 3685 llvm_unreachable("char type should fit into long long"); 3686 } 3687 } 3688 3689 // At this point, we should have a signed or unsigned integer type. 3690 if (Promotable->isSignedIntegerType()) 3691 return IntTy; 3692 uint64_t PromotableSize = getTypeSize(Promotable); 3693 uint64_t IntSize = getTypeSize(IntTy); 3694 assert(Promotable->isUnsignedIntegerType() && PromotableSize <= IntSize); 3695 return (PromotableSize != IntSize) ? IntTy : UnsignedIntTy; 3696} 3697 3698/// \brief Recurses in pointer/array types until it finds an objc retainable 3699/// type and returns its ownership. 3700Qualifiers::ObjCLifetime ASTContext::getInnerObjCOwnership(QualType T) const { 3701 while (!T.isNull()) { 3702 if (T.getObjCLifetime() != Qualifiers::OCL_None) 3703 return T.getObjCLifetime(); 3704 if (T->isArrayType()) 3705 T = getBaseElementType(T); 3706 else if (const PointerType *PT = T->getAs<PointerType>()) 3707 T = PT->getPointeeType(); 3708 else if (const ReferenceType *RT = T->getAs<ReferenceType>()) 3709 T = RT->getPointeeType(); 3710 else 3711 break; 3712 } 3713 3714 return Qualifiers::OCL_None; 3715} 3716 3717/// getIntegerTypeOrder - Returns the highest ranked integer type: 3718/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 3719/// LHS < RHS, return -1. 3720int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) const { 3721 const Type *LHSC = getCanonicalType(LHS).getTypePtr(); 3722 const Type *RHSC = getCanonicalType(RHS).getTypePtr(); 3723 if (LHSC == RHSC) return 0; 3724 3725 bool LHSUnsigned = LHSC->isUnsignedIntegerType(); 3726 bool RHSUnsigned = RHSC->isUnsignedIntegerType(); 3727 3728 unsigned LHSRank = getIntegerRank(LHSC); 3729 unsigned RHSRank = getIntegerRank(RHSC); 3730 3731 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned. 3732 if (LHSRank == RHSRank) return 0; 3733 return LHSRank > RHSRank ? 1 : -1; 3734 } 3735 3736 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa. 3737 if (LHSUnsigned) { 3738 // If the unsigned [LHS] type is larger, return it. 3739 if (LHSRank >= RHSRank) 3740 return 1; 3741 3742 // If the signed type can represent all values of the unsigned type, it 3743 // wins. Because we are dealing with 2's complement and types that are 3744 // powers of two larger than each other, this is always safe. 3745 return -1; 3746 } 3747 3748 // If the unsigned [RHS] type is larger, return it. 3749 if (RHSRank >= LHSRank) 3750 return -1; 3751 3752 // If the signed type can represent all values of the unsigned type, it 3753 // wins. Because we are dealing with 2's complement and types that are 3754 // powers of two larger than each other, this is always safe. 3755 return 1; 3756} 3757 3758static RecordDecl * 3759CreateRecordDecl(const ASTContext &Ctx, RecordDecl::TagKind TK, 3760 DeclContext *DC, IdentifierInfo *Id) { 3761 SourceLocation Loc; 3762 if (Ctx.getLangOptions().CPlusPlus) 3763 return CXXRecordDecl::Create(Ctx, TK, DC, Loc, Loc, Id); 3764 else 3765 return RecordDecl::Create(Ctx, TK, DC, Loc, Loc, Id); 3766} 3767 3768// getCFConstantStringType - Return the type used for constant CFStrings. 3769QualType ASTContext::getCFConstantStringType() const { 3770 if (!CFConstantStringTypeDecl) { 3771 CFConstantStringTypeDecl = 3772 CreateRecordDecl(*this, TTK_Struct, TUDecl, 3773 &Idents.get("NSConstantString")); 3774 CFConstantStringTypeDecl->startDefinition(); 3775 3776 QualType FieldTypes[4]; 3777 3778 // const int *isa; 3779 FieldTypes[0] = getPointerType(IntTy.withConst()); 3780 // int flags; 3781 FieldTypes[1] = IntTy; 3782 // const char *str; 3783 FieldTypes[2] = getPointerType(CharTy.withConst()); 3784 // long length; 3785 FieldTypes[3] = LongTy; 3786 3787 // Create fields 3788 for (unsigned i = 0; i < 4; ++i) { 3789 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl, 3790 SourceLocation(), 3791 SourceLocation(), 0, 3792 FieldTypes[i], /*TInfo=*/0, 3793 /*BitWidth=*/0, 3794 /*Mutable=*/false, 3795 /*HasInit=*/false); 3796 Field->setAccess(AS_public); 3797 CFConstantStringTypeDecl->addDecl(Field); 3798 } 3799 3800 CFConstantStringTypeDecl->completeDefinition(); 3801 } 3802 3803 return getTagDeclType(CFConstantStringTypeDecl); 3804} 3805 3806void ASTContext::setCFConstantStringType(QualType T) { 3807 const RecordType *Rec = T->getAs<RecordType>(); 3808 assert(Rec && "Invalid CFConstantStringType"); 3809 CFConstantStringTypeDecl = Rec->getDecl(); 3810} 3811 3812QualType ASTContext::getBlockDescriptorType() const { 3813 if (BlockDescriptorType) 3814 return getTagDeclType(BlockDescriptorType); 3815 3816 RecordDecl *T; 3817 // FIXME: Needs the FlagAppleBlock bit. 3818 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, 3819 &Idents.get("__block_descriptor")); 3820 T->startDefinition(); 3821 3822 QualType FieldTypes[] = { 3823 UnsignedLongTy, 3824 UnsignedLongTy, 3825 }; 3826 3827 const char *FieldNames[] = { 3828 "reserved", 3829 "Size" 3830 }; 3831 3832 for (size_t i = 0; i < 2; ++i) { 3833 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3834 SourceLocation(), 3835 &Idents.get(FieldNames[i]), 3836 FieldTypes[i], /*TInfo=*/0, 3837 /*BitWidth=*/0, 3838 /*Mutable=*/false, 3839 /*HasInit=*/false); 3840 Field->setAccess(AS_public); 3841 T->addDecl(Field); 3842 } 3843 3844 T->completeDefinition(); 3845 3846 BlockDescriptorType = T; 3847 3848 return getTagDeclType(BlockDescriptorType); 3849} 3850 3851QualType ASTContext::getBlockDescriptorExtendedType() const { 3852 if (BlockDescriptorExtendedType) 3853 return getTagDeclType(BlockDescriptorExtendedType); 3854 3855 RecordDecl *T; 3856 // FIXME: Needs the FlagAppleBlock bit. 3857 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, 3858 &Idents.get("__block_descriptor_withcopydispose")); 3859 T->startDefinition(); 3860 3861 QualType FieldTypes[] = { 3862 UnsignedLongTy, 3863 UnsignedLongTy, 3864 getPointerType(VoidPtrTy), 3865 getPointerType(VoidPtrTy) 3866 }; 3867 3868 const char *FieldNames[] = { 3869 "reserved", 3870 "Size", 3871 "CopyFuncPtr", 3872 "DestroyFuncPtr" 3873 }; 3874 3875 for (size_t i = 0; i < 4; ++i) { 3876 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3877 SourceLocation(), 3878 &Idents.get(FieldNames[i]), 3879 FieldTypes[i], /*TInfo=*/0, 3880 /*BitWidth=*/0, 3881 /*Mutable=*/false, 3882 /*HasInit=*/false); 3883 Field->setAccess(AS_public); 3884 T->addDecl(Field); 3885 } 3886 3887 T->completeDefinition(); 3888 3889 BlockDescriptorExtendedType = T; 3890 3891 return getTagDeclType(BlockDescriptorExtendedType); 3892} 3893 3894bool ASTContext::BlockRequiresCopying(QualType Ty) const { 3895 if (Ty->isObjCRetainableType()) 3896 return true; 3897 if (getLangOptions().CPlusPlus) { 3898 if (const RecordType *RT = Ty->getAs<RecordType>()) { 3899 CXXRecordDecl *RD = cast<CXXRecordDecl>(RT->getDecl()); 3900 return RD->hasConstCopyConstructor(); 3901 3902 } 3903 } 3904 return false; 3905} 3906 3907QualType 3908ASTContext::BuildByRefType(StringRef DeclName, QualType Ty) const { 3909 // type = struct __Block_byref_1_X { 3910 // void *__isa; 3911 // struct __Block_byref_1_X *__forwarding; 3912 // unsigned int __flags; 3913 // unsigned int __size; 3914 // void *__copy_helper; // as needed 3915 // void *__destroy_help // as needed 3916 // int X; 3917 // } * 3918 3919 bool HasCopyAndDispose = BlockRequiresCopying(Ty); 3920 3921 // FIXME: Move up 3922 SmallString<36> Name; 3923 llvm::raw_svector_ostream(Name) << "__Block_byref_" << 3924 ++UniqueBlockByRefTypeID << '_' << DeclName; 3925 RecordDecl *T; 3926 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, &Idents.get(Name.str())); 3927 T->startDefinition(); 3928 QualType Int32Ty = IntTy; 3929 assert(getIntWidth(IntTy) == 32 && "non-32bit int not supported"); 3930 QualType FieldTypes[] = { 3931 getPointerType(VoidPtrTy), 3932 getPointerType(getTagDeclType(T)), 3933 Int32Ty, 3934 Int32Ty, 3935 getPointerType(VoidPtrTy), 3936 getPointerType(VoidPtrTy), 3937 Ty 3938 }; 3939 3940 StringRef FieldNames[] = { 3941 "__isa", 3942 "__forwarding", 3943 "__flags", 3944 "__size", 3945 "__copy_helper", 3946 "__destroy_helper", 3947 DeclName, 3948 }; 3949 3950 for (size_t i = 0; i < 7; ++i) { 3951 if (!HasCopyAndDispose && i >=4 && i <= 5) 3952 continue; 3953 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3954 SourceLocation(), 3955 &Idents.get(FieldNames[i]), 3956 FieldTypes[i], /*TInfo=*/0, 3957 /*BitWidth=*/0, /*Mutable=*/false, 3958 /*HasInit=*/false); 3959 Field->setAccess(AS_public); 3960 T->addDecl(Field); 3961 } 3962 3963 T->completeDefinition(); 3964 3965 return getPointerType(getTagDeclType(T)); 3966} 3967 3968TypedefDecl *ASTContext::getObjCInstanceTypeDecl() { 3969 if (!ObjCInstanceTypeDecl) 3970 ObjCInstanceTypeDecl = TypedefDecl::Create(*this, 3971 getTranslationUnitDecl(), 3972 SourceLocation(), 3973 SourceLocation(), 3974 &Idents.get("instancetype"), 3975 getTrivialTypeSourceInfo(getObjCIdType())); 3976 return ObjCInstanceTypeDecl; 3977} 3978 3979// This returns true if a type has been typedefed to BOOL: 3980// typedef <type> BOOL; 3981static bool isTypeTypedefedAsBOOL(QualType T) { 3982 if (const TypedefType *TT = dyn_cast<TypedefType>(T)) 3983 if (IdentifierInfo *II = TT->getDecl()->getIdentifier()) 3984 return II->isStr("BOOL"); 3985 3986 return false; 3987} 3988 3989/// getObjCEncodingTypeSize returns size of type for objective-c encoding 3990/// purpose. 3991CharUnits ASTContext::getObjCEncodingTypeSize(QualType type) const { 3992 if (!type->isIncompleteArrayType() && type->isIncompleteType()) 3993 return CharUnits::Zero(); 3994 3995 CharUnits sz = getTypeSizeInChars(type); 3996 3997 // Make all integer and enum types at least as large as an int 3998 if (sz.isPositive() && type->isIntegralOrEnumerationType()) 3999 sz = std::max(sz, getTypeSizeInChars(IntTy)); 4000 // Treat arrays as pointers, since that's how they're passed in. 4001 else if (type->isArrayType()) 4002 sz = getTypeSizeInChars(VoidPtrTy); 4003 return sz; 4004} 4005 4006static inline 4007std::string charUnitsToString(const CharUnits &CU) { 4008 return llvm::itostr(CU.getQuantity()); 4009} 4010 4011/// getObjCEncodingForBlock - Return the encoded type for this block 4012/// declaration. 4013std::string ASTContext::getObjCEncodingForBlock(const BlockExpr *Expr) const { 4014 std::string S; 4015 4016 const BlockDecl *Decl = Expr->getBlockDecl(); 4017 QualType BlockTy = 4018 Expr->getType()->getAs<BlockPointerType>()->getPointeeType(); 4019 // Encode result type. 4020 getObjCEncodingForType(BlockTy->getAs<FunctionType>()->getResultType(), S); 4021 // Compute size of all parameters. 4022 // Start with computing size of a pointer in number of bytes. 4023 // FIXME: There might(should) be a better way of doing this computation! 4024 SourceLocation Loc; 4025 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 4026 CharUnits ParmOffset = PtrSize; 4027 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), 4028 E = Decl->param_end(); PI != E; ++PI) { 4029 QualType PType = (*PI)->getType(); 4030 CharUnits sz = getObjCEncodingTypeSize(PType); 4031 assert (sz.isPositive() && "BlockExpr - Incomplete param type"); 4032 ParmOffset += sz; 4033 } 4034 // Size of the argument frame 4035 S += charUnitsToString(ParmOffset); 4036 // Block pointer and offset. 4037 S += "@?0"; 4038 4039 // Argument types. 4040 ParmOffset = PtrSize; 4041 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), E = 4042 Decl->param_end(); PI != E; ++PI) { 4043 ParmVarDecl *PVDecl = *PI; 4044 QualType PType = PVDecl->getOriginalType(); 4045 if (const ArrayType *AT = 4046 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 4047 // Use array's original type only if it has known number of 4048 // elements. 4049 if (!isa<ConstantArrayType>(AT)) 4050 PType = PVDecl->getType(); 4051 } else if (PType->isFunctionType()) 4052 PType = PVDecl->getType(); 4053 getObjCEncodingForType(PType, S); 4054 S += charUnitsToString(ParmOffset); 4055 ParmOffset += getObjCEncodingTypeSize(PType); 4056 } 4057 4058 return S; 4059} 4060 4061bool ASTContext::getObjCEncodingForFunctionDecl(const FunctionDecl *Decl, 4062 std::string& S) { 4063 // Encode result type. 4064 getObjCEncodingForType(Decl->getResultType(), S); 4065 CharUnits ParmOffset; 4066 // Compute size of all parameters. 4067 for (FunctionDecl::param_const_iterator PI = Decl->param_begin(), 4068 E = Decl->param_end(); PI != E; ++PI) { 4069 QualType PType = (*PI)->getType(); 4070 CharUnits sz = getObjCEncodingTypeSize(PType); 4071 if (sz.isZero()) 4072 return true; 4073 4074 assert (sz.isPositive() && 4075 "getObjCEncodingForFunctionDecl - Incomplete param type"); 4076 ParmOffset += sz; 4077 } 4078 S += charUnitsToString(ParmOffset); 4079 ParmOffset = CharUnits::Zero(); 4080 4081 // Argument types. 4082 for (FunctionDecl::param_const_iterator PI = Decl->param_begin(), 4083 E = Decl->param_end(); PI != E; ++PI) { 4084 ParmVarDecl *PVDecl = *PI; 4085 QualType PType = PVDecl->getOriginalType(); 4086 if (const ArrayType *AT = 4087 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 4088 // Use array's original type only if it has known number of 4089 // elements. 4090 if (!isa<ConstantArrayType>(AT)) 4091 PType = PVDecl->getType(); 4092 } else if (PType->isFunctionType()) 4093 PType = PVDecl->getType(); 4094 getObjCEncodingForType(PType, S); 4095 S += charUnitsToString(ParmOffset); 4096 ParmOffset += getObjCEncodingTypeSize(PType); 4097 } 4098 4099 return false; 4100} 4101 4102/// getObjCEncodingForMethodParameter - Return the encoded type for a single 4103/// method parameter or return type. If Extended, include class names and 4104/// block object types. 4105void ASTContext::getObjCEncodingForMethodParameter(Decl::ObjCDeclQualifier QT, 4106 QualType T, std::string& S, 4107 bool Extended) const { 4108 // Encode type qualifer, 'in', 'inout', etc. for the parameter. 4109 getObjCEncodingForTypeQualifier(QT, S); 4110 // Encode parameter type. 4111 getObjCEncodingForTypeImpl(T, S, true, true, 0, 4112 true /*OutermostType*/, 4113 false /*EncodingProperty*/, 4114 false /*StructField*/, 4115 Extended /*EncodeBlockParameters*/, 4116 Extended /*EncodeClassNames*/); 4117} 4118 4119/// getObjCEncodingForMethodDecl - Return the encoded type for this method 4120/// declaration. 4121bool ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, 4122 std::string& S, 4123 bool Extended) const { 4124 // FIXME: This is not very efficient. 4125 // Encode return type. 4126 getObjCEncodingForMethodParameter(Decl->getObjCDeclQualifier(), 4127 Decl->getResultType(), S, Extended); 4128 // Compute size of all parameters. 4129 // Start with computing size of a pointer in number of bytes. 4130 // FIXME: There might(should) be a better way of doing this computation! 4131 SourceLocation Loc; 4132 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 4133 // The first two arguments (self and _cmd) are pointers; account for 4134 // their size. 4135 CharUnits ParmOffset = 2 * PtrSize; 4136 for (ObjCMethodDecl::param_const_iterator PI = Decl->param_begin(), 4137 E = Decl->sel_param_end(); PI != E; ++PI) { 4138 QualType PType = (*PI)->getType(); 4139 CharUnits sz = getObjCEncodingTypeSize(PType); 4140 if (sz.isZero()) 4141 return true; 4142 4143 assert (sz.isPositive() && 4144 "getObjCEncodingForMethodDecl - Incomplete param type"); 4145 ParmOffset += sz; 4146 } 4147 S += charUnitsToString(ParmOffset); 4148 S += "@0:"; 4149 S += charUnitsToString(PtrSize); 4150 4151 // Argument types. 4152 ParmOffset = 2 * PtrSize; 4153 for (ObjCMethodDecl::param_const_iterator PI = Decl->param_begin(), 4154 E = Decl->sel_param_end(); PI != E; ++PI) { 4155 const ParmVarDecl *PVDecl = *PI; 4156 QualType PType = PVDecl->getOriginalType(); 4157 if (const ArrayType *AT = 4158 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 4159 // Use array's original type only if it has known number of 4160 // elements. 4161 if (!isa<ConstantArrayType>(AT)) 4162 PType = PVDecl->getType(); 4163 } else if (PType->isFunctionType()) 4164 PType = PVDecl->getType(); 4165 getObjCEncodingForMethodParameter(PVDecl->getObjCDeclQualifier(), 4166 PType, S, Extended); 4167 S += charUnitsToString(ParmOffset); 4168 ParmOffset += getObjCEncodingTypeSize(PType); 4169 } 4170 4171 return false; 4172} 4173 4174/// getObjCEncodingForPropertyDecl - Return the encoded type for this 4175/// property declaration. If non-NULL, Container must be either an 4176/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be 4177/// NULL when getting encodings for protocol properties. 4178/// Property attributes are stored as a comma-delimited C string. The simple 4179/// attributes readonly and bycopy are encoded as single characters. The 4180/// parametrized attributes, getter=name, setter=name, and ivar=name, are 4181/// encoded as single characters, followed by an identifier. Property types 4182/// are also encoded as a parametrized attribute. The characters used to encode 4183/// these attributes are defined by the following enumeration: 4184/// @code 4185/// enum PropertyAttributes { 4186/// kPropertyReadOnly = 'R', // property is read-only. 4187/// kPropertyBycopy = 'C', // property is a copy of the value last assigned 4188/// kPropertyByref = '&', // property is a reference to the value last assigned 4189/// kPropertyDynamic = 'D', // property is dynamic 4190/// kPropertyGetter = 'G', // followed by getter selector name 4191/// kPropertySetter = 'S', // followed by setter selector name 4192/// kPropertyInstanceVariable = 'V' // followed by instance variable name 4193/// kPropertyType = 't' // followed by old-style type encoding. 4194/// kPropertyWeak = 'W' // 'weak' property 4195/// kPropertyStrong = 'P' // property GC'able 4196/// kPropertyNonAtomic = 'N' // property non-atomic 4197/// }; 4198/// @endcode 4199void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 4200 const Decl *Container, 4201 std::string& S) const { 4202 // Collect information from the property implementation decl(s). 4203 bool Dynamic = false; 4204 ObjCPropertyImplDecl *SynthesizePID = 0; 4205 4206 // FIXME: Duplicated code due to poor abstraction. 4207 if (Container) { 4208 if (const ObjCCategoryImplDecl *CID = 4209 dyn_cast<ObjCCategoryImplDecl>(Container)) { 4210 for (ObjCCategoryImplDecl::propimpl_iterator 4211 i = CID->propimpl_begin(), e = CID->propimpl_end(); 4212 i != e; ++i) { 4213 ObjCPropertyImplDecl *PID = *i; 4214 if (PID->getPropertyDecl() == PD) { 4215 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 4216 Dynamic = true; 4217 } else { 4218 SynthesizePID = PID; 4219 } 4220 } 4221 } 4222 } else { 4223 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container); 4224 for (ObjCCategoryImplDecl::propimpl_iterator 4225 i = OID->propimpl_begin(), e = OID->propimpl_end(); 4226 i != e; ++i) { 4227 ObjCPropertyImplDecl *PID = *i; 4228 if (PID->getPropertyDecl() == PD) { 4229 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 4230 Dynamic = true; 4231 } else { 4232 SynthesizePID = PID; 4233 } 4234 } 4235 } 4236 } 4237 } 4238 4239 // FIXME: This is not very efficient. 4240 S = "T"; 4241 4242 // Encode result type. 4243 // GCC has some special rules regarding encoding of properties which 4244 // closely resembles encoding of ivars. 4245 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, 0, 4246 true /* outermost type */, 4247 true /* encoding for property */); 4248 4249 if (PD->isReadOnly()) { 4250 S += ",R"; 4251 } else { 4252 switch (PD->getSetterKind()) { 4253 case ObjCPropertyDecl::Assign: break; 4254 case ObjCPropertyDecl::Copy: S += ",C"; break; 4255 case ObjCPropertyDecl::Retain: S += ",&"; break; 4256 case ObjCPropertyDecl::Weak: S += ",W"; break; 4257 } 4258 } 4259 4260 // It really isn't clear at all what this means, since properties 4261 // are "dynamic by default". 4262 if (Dynamic) 4263 S += ",D"; 4264 4265 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) 4266 S += ",N"; 4267 4268 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) { 4269 S += ",G"; 4270 S += PD->getGetterName().getAsString(); 4271 } 4272 4273 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) { 4274 S += ",S"; 4275 S += PD->getSetterName().getAsString(); 4276 } 4277 4278 if (SynthesizePID) { 4279 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl(); 4280 S += ",V"; 4281 S += OID->getNameAsString(); 4282 } 4283 4284 // FIXME: OBJCGC: weak & strong 4285} 4286 4287/// getLegacyIntegralTypeEncoding - 4288/// Another legacy compatibility encoding: 32-bit longs are encoded as 4289/// 'l' or 'L' , but not always. For typedefs, we need to use 4290/// 'i' or 'I' instead if encoding a struct field, or a pointer! 4291/// 4292void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const { 4293 if (isa<TypedefType>(PointeeTy.getTypePtr())) { 4294 if (const BuiltinType *BT = PointeeTy->getAs<BuiltinType>()) { 4295 if (BT->getKind() == BuiltinType::ULong && getIntWidth(PointeeTy) == 32) 4296 PointeeTy = UnsignedIntTy; 4297 else 4298 if (BT->getKind() == BuiltinType::Long && getIntWidth(PointeeTy) == 32) 4299 PointeeTy = IntTy; 4300 } 4301 } 4302} 4303 4304void ASTContext::getObjCEncodingForType(QualType T, std::string& S, 4305 const FieldDecl *Field) const { 4306 // We follow the behavior of gcc, expanding structures which are 4307 // directly pointed to, and expanding embedded structures. Note that 4308 // these rules are sufficient to prevent recursive encoding of the 4309 // same type. 4310 getObjCEncodingForTypeImpl(T, S, true, true, Field, 4311 true /* outermost type */); 4312} 4313 4314static char ObjCEncodingForPrimitiveKind(const ASTContext *C, QualType T) { 4315 switch (T->getAs<BuiltinType>()->getKind()) { 4316 default: llvm_unreachable("Unhandled builtin type kind"); 4317 case BuiltinType::Void: return 'v'; 4318 case BuiltinType::Bool: return 'B'; 4319 case BuiltinType::Char_U: 4320 case BuiltinType::UChar: return 'C'; 4321 case BuiltinType::UShort: return 'S'; 4322 case BuiltinType::UInt: return 'I'; 4323 case BuiltinType::ULong: 4324 return C->getIntWidth(T) == 32 ? 'L' : 'Q'; 4325 case BuiltinType::UInt128: return 'T'; 4326 case BuiltinType::ULongLong: return 'Q'; 4327 case BuiltinType::Char_S: 4328 case BuiltinType::SChar: return 'c'; 4329 case BuiltinType::Short: return 's'; 4330 case BuiltinType::WChar_S: 4331 case BuiltinType::WChar_U: 4332 case BuiltinType::Int: return 'i'; 4333 case BuiltinType::Long: 4334 return C->getIntWidth(T) == 32 ? 'l' : 'q'; 4335 case BuiltinType::LongLong: return 'q'; 4336 case BuiltinType::Int128: return 't'; 4337 case BuiltinType::Float: return 'f'; 4338 case BuiltinType::Double: return 'd'; 4339 case BuiltinType::LongDouble: return 'D'; 4340 } 4341} 4342 4343static char ObjCEncodingForEnumType(const ASTContext *C, const EnumType *ET) { 4344 EnumDecl *Enum = ET->getDecl(); 4345 4346 // The encoding of an non-fixed enum type is always 'i', regardless of size. 4347 if (!Enum->isFixed()) 4348 return 'i'; 4349 4350 // The encoding of a fixed enum type matches its fixed underlying type. 4351 return ObjCEncodingForPrimitiveKind(C, Enum->getIntegerType()); 4352} 4353 4354static void EncodeBitField(const ASTContext *Ctx, std::string& S, 4355 QualType T, const FieldDecl *FD) { 4356 assert(FD->isBitField() && "not a bitfield - getObjCEncodingForTypeImpl"); 4357 S += 'b'; 4358 // The NeXT runtime encodes bit fields as b followed by the number of bits. 4359 // The GNU runtime requires more information; bitfields are encoded as b, 4360 // then the offset (in bits) of the first element, then the type of the 4361 // bitfield, then the size in bits. For example, in this structure: 4362 // 4363 // struct 4364 // { 4365 // int integer; 4366 // int flags:2; 4367 // }; 4368 // On a 32-bit system, the encoding for flags would be b2 for the NeXT 4369 // runtime, but b32i2 for the GNU runtime. The reason for this extra 4370 // information is not especially sensible, but we're stuck with it for 4371 // compatibility with GCC, although providing it breaks anything that 4372 // actually uses runtime introspection and wants to work on both runtimes... 4373 if (!Ctx->getLangOptions().NeXTRuntime) { 4374 const RecordDecl *RD = FD->getParent(); 4375 const ASTRecordLayout &RL = Ctx->getASTRecordLayout(RD); 4376 S += llvm::utostr(RL.getFieldOffset(FD->getFieldIndex())); 4377 if (const EnumType *ET = T->getAs<EnumType>()) 4378 S += ObjCEncodingForEnumType(Ctx, ET); 4379 else 4380 S += ObjCEncodingForPrimitiveKind(Ctx, T); 4381 } 4382 S += llvm::utostr(FD->getBitWidthValue(*Ctx)); 4383} 4384 4385// FIXME: Use SmallString for accumulating string. 4386void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S, 4387 bool ExpandPointedToStructures, 4388 bool ExpandStructures, 4389 const FieldDecl *FD, 4390 bool OutermostType, 4391 bool EncodingProperty, 4392 bool StructField, 4393 bool EncodeBlockParameters, 4394 bool EncodeClassNames) const { 4395 if (T->getAs<BuiltinType>()) { 4396 if (FD && FD->isBitField()) 4397 return EncodeBitField(this, S, T, FD); 4398 S += ObjCEncodingForPrimitiveKind(this, T); 4399 return; 4400 } 4401 4402 if (const ComplexType *CT = T->getAs<ComplexType>()) { 4403 S += 'j'; 4404 getObjCEncodingForTypeImpl(CT->getElementType(), S, false, false, 0, false, 4405 false); 4406 return; 4407 } 4408 4409 // encoding for pointer or r3eference types. 4410 QualType PointeeTy; 4411 if (const PointerType *PT = T->getAs<PointerType>()) { 4412 if (PT->isObjCSelType()) { 4413 S += ':'; 4414 return; 4415 } 4416 PointeeTy = PT->getPointeeType(); 4417 } 4418 else if (const ReferenceType *RT = T->getAs<ReferenceType>()) 4419 PointeeTy = RT->getPointeeType(); 4420 if (!PointeeTy.isNull()) { 4421 bool isReadOnly = false; 4422 // For historical/compatibility reasons, the read-only qualifier of the 4423 // pointee gets emitted _before_ the '^'. The read-only qualifier of 4424 // the pointer itself gets ignored, _unless_ we are looking at a typedef! 4425 // Also, do not emit the 'r' for anything but the outermost type! 4426 if (isa<TypedefType>(T.getTypePtr())) { 4427 if (OutermostType && T.isConstQualified()) { 4428 isReadOnly = true; 4429 S += 'r'; 4430 } 4431 } else if (OutermostType) { 4432 QualType P = PointeeTy; 4433 while (P->getAs<PointerType>()) 4434 P = P->getAs<PointerType>()->getPointeeType(); 4435 if (P.isConstQualified()) { 4436 isReadOnly = true; 4437 S += 'r'; 4438 } 4439 } 4440 if (isReadOnly) { 4441 // Another legacy compatibility encoding. Some ObjC qualifier and type 4442 // combinations need to be rearranged. 4443 // Rewrite "in const" from "nr" to "rn" 4444 if (StringRef(S).endswith("nr")) 4445 S.replace(S.end()-2, S.end(), "rn"); 4446 } 4447 4448 if (PointeeTy->isCharType()) { 4449 // char pointer types should be encoded as '*' unless it is a 4450 // type that has been typedef'd to 'BOOL'. 4451 if (!isTypeTypedefedAsBOOL(PointeeTy)) { 4452 S += '*'; 4453 return; 4454 } 4455 } else if (const RecordType *RTy = PointeeTy->getAs<RecordType>()) { 4456 // GCC binary compat: Need to convert "struct objc_class *" to "#". 4457 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_class")) { 4458 S += '#'; 4459 return; 4460 } 4461 // GCC binary compat: Need to convert "struct objc_object *" to "@". 4462 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_object")) { 4463 S += '@'; 4464 return; 4465 } 4466 // fall through... 4467 } 4468 S += '^'; 4469 getLegacyIntegralTypeEncoding(PointeeTy); 4470 4471 getObjCEncodingForTypeImpl(PointeeTy, S, false, ExpandPointedToStructures, 4472 NULL); 4473 return; 4474 } 4475 4476 if (const ArrayType *AT = 4477 // Ignore type qualifiers etc. 4478 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) { 4479 if (isa<IncompleteArrayType>(AT) && !StructField) { 4480 // Incomplete arrays are encoded as a pointer to the array element. 4481 S += '^'; 4482 4483 getObjCEncodingForTypeImpl(AT->getElementType(), S, 4484 false, ExpandStructures, FD); 4485 } else { 4486 S += '['; 4487 4488 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) { 4489 if (getTypeSize(CAT->getElementType()) == 0) 4490 S += '0'; 4491 else 4492 S += llvm::utostr(CAT->getSize().getZExtValue()); 4493 } else { 4494 //Variable length arrays are encoded as a regular array with 0 elements. 4495 assert((isa<VariableArrayType>(AT) || isa<IncompleteArrayType>(AT)) && 4496 "Unknown array type!"); 4497 S += '0'; 4498 } 4499 4500 getObjCEncodingForTypeImpl(AT->getElementType(), S, 4501 false, ExpandStructures, FD); 4502 S += ']'; 4503 } 4504 return; 4505 } 4506 4507 if (T->getAs<FunctionType>()) { 4508 S += '?'; 4509 return; 4510 } 4511 4512 if (const RecordType *RTy = T->getAs<RecordType>()) { 4513 RecordDecl *RDecl = RTy->getDecl(); 4514 S += RDecl->isUnion() ? '(' : '{'; 4515 // Anonymous structures print as '?' 4516 if (const IdentifierInfo *II = RDecl->getIdentifier()) { 4517 S += II->getName(); 4518 if (ClassTemplateSpecializationDecl *Spec 4519 = dyn_cast<ClassTemplateSpecializationDecl>(RDecl)) { 4520 const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs(); 4521 std::string TemplateArgsStr 4522 = TemplateSpecializationType::PrintTemplateArgumentList( 4523 TemplateArgs.data(), 4524 TemplateArgs.size(), 4525 (*this).getPrintingPolicy()); 4526 4527 S += TemplateArgsStr; 4528 } 4529 } else { 4530 S += '?'; 4531 } 4532 if (ExpandStructures) { 4533 S += '='; 4534 if (!RDecl->isUnion()) { 4535 getObjCEncodingForStructureImpl(RDecl, S, FD); 4536 } else { 4537 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 4538 FieldEnd = RDecl->field_end(); 4539 Field != FieldEnd; ++Field) { 4540 if (FD) { 4541 S += '"'; 4542 S += Field->getNameAsString(); 4543 S += '"'; 4544 } 4545 4546 // Special case bit-fields. 4547 if (Field->isBitField()) { 4548 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, 4549 (*Field)); 4550 } else { 4551 QualType qt = Field->getType(); 4552 getLegacyIntegralTypeEncoding(qt); 4553 getObjCEncodingForTypeImpl(qt, S, false, true, 4554 FD, /*OutermostType*/false, 4555 /*EncodingProperty*/false, 4556 /*StructField*/true); 4557 } 4558 } 4559 } 4560 } 4561 S += RDecl->isUnion() ? ')' : '}'; 4562 return; 4563 } 4564 4565 if (const EnumType *ET = T->getAs<EnumType>()) { 4566 if (FD && FD->isBitField()) 4567 EncodeBitField(this, S, T, FD); 4568 else 4569 S += ObjCEncodingForEnumType(this, ET); 4570 return; 4571 } 4572 4573 if (const BlockPointerType *BT = T->getAs<BlockPointerType>()) { 4574 S += "@?"; // Unlike a pointer-to-function, which is "^?". 4575 if (EncodeBlockParameters) { 4576 const FunctionType *FT = BT->getPointeeType()->getAs<FunctionType>(); 4577 4578 S += '<'; 4579 // Block return type 4580 getObjCEncodingForTypeImpl(FT->getResultType(), S, 4581 ExpandPointedToStructures, ExpandStructures, 4582 FD, 4583 false /* OutermostType */, 4584 EncodingProperty, 4585 false /* StructField */, 4586 EncodeBlockParameters, 4587 EncodeClassNames); 4588 // Block self 4589 S += "@?"; 4590 // Block parameters 4591 if (const FunctionProtoType *FPT = dyn_cast<FunctionProtoType>(FT)) { 4592 for (FunctionProtoType::arg_type_iterator I = FPT->arg_type_begin(), 4593 E = FPT->arg_type_end(); I && (I != E); ++I) { 4594 getObjCEncodingForTypeImpl(*I, S, 4595 ExpandPointedToStructures, 4596 ExpandStructures, 4597 FD, 4598 false /* OutermostType */, 4599 EncodingProperty, 4600 false /* StructField */, 4601 EncodeBlockParameters, 4602 EncodeClassNames); 4603 } 4604 } 4605 S += '>'; 4606 } 4607 return; 4608 } 4609 4610 // Ignore protocol qualifiers when mangling at this level. 4611 if (const ObjCObjectType *OT = T->getAs<ObjCObjectType>()) 4612 T = OT->getBaseType(); 4613 4614 if (const ObjCInterfaceType *OIT = T->getAs<ObjCInterfaceType>()) { 4615 // @encode(class_name) 4616 ObjCInterfaceDecl *OI = OIT->getDecl(); 4617 S += '{'; 4618 const IdentifierInfo *II = OI->getIdentifier(); 4619 S += II->getName(); 4620 S += '='; 4621 SmallVector<const ObjCIvarDecl*, 32> Ivars; 4622 DeepCollectObjCIvars(OI, true, Ivars); 4623 for (unsigned i = 0, e = Ivars.size(); i != e; ++i) { 4624 const FieldDecl *Field = cast<FieldDecl>(Ivars[i]); 4625 if (Field->isBitField()) 4626 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, Field); 4627 else 4628 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, FD); 4629 } 4630 S += '}'; 4631 return; 4632 } 4633 4634 if (const ObjCObjectPointerType *OPT = T->getAs<ObjCObjectPointerType>()) { 4635 if (OPT->isObjCIdType()) { 4636 S += '@'; 4637 return; 4638 } 4639 4640 if (OPT->isObjCClassType() || OPT->isObjCQualifiedClassType()) { 4641 // FIXME: Consider if we need to output qualifiers for 'Class<p>'. 4642 // Since this is a binary compatibility issue, need to consult with runtime 4643 // folks. Fortunately, this is a *very* obsure construct. 4644 S += '#'; 4645 return; 4646 } 4647 4648 if (OPT->isObjCQualifiedIdType()) { 4649 getObjCEncodingForTypeImpl(getObjCIdType(), S, 4650 ExpandPointedToStructures, 4651 ExpandStructures, FD); 4652 if (FD || EncodingProperty || EncodeClassNames) { 4653 // Note that we do extended encoding of protocol qualifer list 4654 // Only when doing ivar or property encoding. 4655 S += '"'; 4656 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 4657 E = OPT->qual_end(); I != E; ++I) { 4658 S += '<'; 4659 S += (*I)->getNameAsString(); 4660 S += '>'; 4661 } 4662 S += '"'; 4663 } 4664 return; 4665 } 4666 4667 QualType PointeeTy = OPT->getPointeeType(); 4668 if (!EncodingProperty && 4669 isa<TypedefType>(PointeeTy.getTypePtr())) { 4670 // Another historical/compatibility reason. 4671 // We encode the underlying type which comes out as 4672 // {...}; 4673 S += '^'; 4674 getObjCEncodingForTypeImpl(PointeeTy, S, 4675 false, ExpandPointedToStructures, 4676 NULL); 4677 return; 4678 } 4679 4680 S += '@'; 4681 if (OPT->getInterfaceDecl() && 4682 (FD || EncodingProperty || EncodeClassNames)) { 4683 S += '"'; 4684 S += OPT->getInterfaceDecl()->getIdentifier()->getName(); 4685 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 4686 E = OPT->qual_end(); I != E; ++I) { 4687 S += '<'; 4688 S += (*I)->getNameAsString(); 4689 S += '>'; 4690 } 4691 S += '"'; 4692 } 4693 return; 4694 } 4695 4696 // gcc just blithely ignores member pointers. 4697 // TODO: maybe there should be a mangling for these 4698 if (T->getAs<MemberPointerType>()) 4699 return; 4700 4701 if (T->isVectorType()) { 4702 // This matches gcc's encoding, even though technically it is 4703 // insufficient. 4704 // FIXME. We should do a better job than gcc. 4705 return; 4706 } 4707 4708 llvm_unreachable("@encode for type not implemented!"); 4709} 4710 4711void ASTContext::getObjCEncodingForStructureImpl(RecordDecl *RDecl, 4712 std::string &S, 4713 const FieldDecl *FD, 4714 bool includeVBases) const { 4715 assert(RDecl && "Expected non-null RecordDecl"); 4716 assert(!RDecl->isUnion() && "Should not be called for unions"); 4717 if (!RDecl->getDefinition()) 4718 return; 4719 4720 CXXRecordDecl *CXXRec = dyn_cast<CXXRecordDecl>(RDecl); 4721 std::multimap<uint64_t, NamedDecl *> FieldOrBaseOffsets; 4722 const ASTRecordLayout &layout = getASTRecordLayout(RDecl); 4723 4724 if (CXXRec) { 4725 for (CXXRecordDecl::base_class_iterator 4726 BI = CXXRec->bases_begin(), 4727 BE = CXXRec->bases_end(); BI != BE; ++BI) { 4728 if (!BI->isVirtual()) { 4729 CXXRecordDecl *base = BI->getType()->getAsCXXRecordDecl(); 4730 if (base->isEmpty()) 4731 continue; 4732 uint64_t offs = layout.getBaseClassOffsetInBits(base); 4733 FieldOrBaseOffsets.insert(FieldOrBaseOffsets.upper_bound(offs), 4734 std::make_pair(offs, base)); 4735 } 4736 } 4737 } 4738 4739 unsigned i = 0; 4740 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 4741 FieldEnd = RDecl->field_end(); 4742 Field != FieldEnd; ++Field, ++i) { 4743 uint64_t offs = layout.getFieldOffset(i); 4744 FieldOrBaseOffsets.insert(FieldOrBaseOffsets.upper_bound(offs), 4745 std::make_pair(offs, *Field)); 4746 } 4747 4748 if (CXXRec && includeVBases) { 4749 for (CXXRecordDecl::base_class_iterator 4750 BI = CXXRec->vbases_begin(), 4751 BE = CXXRec->vbases_end(); BI != BE; ++BI) { 4752 CXXRecordDecl *base = BI->getType()->getAsCXXRecordDecl(); 4753 if (base->isEmpty()) 4754 continue; 4755 uint64_t offs = layout.getVBaseClassOffsetInBits(base); 4756 if (FieldOrBaseOffsets.find(offs) == FieldOrBaseOffsets.end()) 4757 FieldOrBaseOffsets.insert(FieldOrBaseOffsets.end(), 4758 std::make_pair(offs, base)); 4759 } 4760 } 4761 4762 CharUnits size; 4763 if (CXXRec) { 4764 size = includeVBases ? layout.getSize() : layout.getNonVirtualSize(); 4765 } else { 4766 size = layout.getSize(); 4767 } 4768 4769 uint64_t CurOffs = 0; 4770 std::multimap<uint64_t, NamedDecl *>::iterator 4771 CurLayObj = FieldOrBaseOffsets.begin(); 4772 4773 if ((CurLayObj != FieldOrBaseOffsets.end() && CurLayObj->first != 0) || 4774 (CurLayObj == FieldOrBaseOffsets.end() && 4775 CXXRec && CXXRec->isDynamicClass())) { 4776 assert(CXXRec && CXXRec->isDynamicClass() && 4777 "Offset 0 was empty but no VTable ?"); 4778 if (FD) { 4779 S += "\"_vptr$"; 4780 std::string recname = CXXRec->getNameAsString(); 4781 if (recname.empty()) recname = "?"; 4782 S += recname; 4783 S += '"'; 4784 } 4785 S += "^^?"; 4786 CurOffs += getTypeSize(VoidPtrTy); 4787 } 4788 4789 if (!RDecl->hasFlexibleArrayMember()) { 4790 // Mark the end of the structure. 4791 uint64_t offs = toBits(size); 4792 FieldOrBaseOffsets.insert(FieldOrBaseOffsets.upper_bound(offs), 4793 std::make_pair(offs, (NamedDecl*)0)); 4794 } 4795 4796 for (; CurLayObj != FieldOrBaseOffsets.end(); ++CurLayObj) { 4797 assert(CurOffs <= CurLayObj->first); 4798 4799 if (CurOffs < CurLayObj->first) { 4800 uint64_t padding = CurLayObj->first - CurOffs; 4801 // FIXME: There doesn't seem to be a way to indicate in the encoding that 4802 // packing/alignment of members is different that normal, in which case 4803 // the encoding will be out-of-sync with the real layout. 4804 // If the runtime switches to just consider the size of types without 4805 // taking into account alignment, we could make padding explicit in the 4806 // encoding (e.g. using arrays of chars). The encoding strings would be 4807 // longer then though. 4808 CurOffs += padding; 4809 } 4810 4811 NamedDecl *dcl = CurLayObj->second; 4812 if (dcl == 0) 4813 break; // reached end of structure. 4814 4815 if (CXXRecordDecl *base = dyn_cast<CXXRecordDecl>(dcl)) { 4816 // We expand the bases without their virtual bases since those are going 4817 // in the initial structure. Note that this differs from gcc which 4818 // expands virtual bases each time one is encountered in the hierarchy, 4819 // making the encoding type bigger than it really is. 4820 getObjCEncodingForStructureImpl(base, S, FD, /*includeVBases*/false); 4821 assert(!base->isEmpty()); 4822 CurOffs += toBits(getASTRecordLayout(base).getNonVirtualSize()); 4823 } else { 4824 FieldDecl *field = cast<FieldDecl>(dcl); 4825 if (FD) { 4826 S += '"'; 4827 S += field->getNameAsString(); 4828 S += '"'; 4829 } 4830 4831 if (field->isBitField()) { 4832 EncodeBitField(this, S, field->getType(), field); 4833 CurOffs += field->getBitWidthValue(*this); 4834 } else { 4835 QualType qt = field->getType(); 4836 getLegacyIntegralTypeEncoding(qt); 4837 getObjCEncodingForTypeImpl(qt, S, false, true, FD, 4838 /*OutermostType*/false, 4839 /*EncodingProperty*/false, 4840 /*StructField*/true); 4841 CurOffs += getTypeSize(field->getType()); 4842 } 4843 } 4844 } 4845} 4846 4847void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 4848 std::string& S) const { 4849 if (QT & Decl::OBJC_TQ_In) 4850 S += 'n'; 4851 if (QT & Decl::OBJC_TQ_Inout) 4852 S += 'N'; 4853 if (QT & Decl::OBJC_TQ_Out) 4854 S += 'o'; 4855 if (QT & Decl::OBJC_TQ_Bycopy) 4856 S += 'O'; 4857 if (QT & Decl::OBJC_TQ_Byref) 4858 S += 'R'; 4859 if (QT & Decl::OBJC_TQ_Oneway) 4860 S += 'V'; 4861} 4862 4863void ASTContext::setBuiltinVaListType(QualType T) { 4864 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!"); 4865 4866 BuiltinVaListType = T; 4867} 4868 4869TypedefDecl *ASTContext::getObjCIdDecl() const { 4870 if (!ObjCIdDecl) { 4871 QualType T = getObjCObjectType(ObjCBuiltinIdTy, 0, 0); 4872 T = getObjCObjectPointerType(T); 4873 TypeSourceInfo *IdInfo = getTrivialTypeSourceInfo(T); 4874 ObjCIdDecl = TypedefDecl::Create(const_cast<ASTContext &>(*this), 4875 getTranslationUnitDecl(), 4876 SourceLocation(), SourceLocation(), 4877 &Idents.get("id"), IdInfo); 4878 } 4879 4880 return ObjCIdDecl; 4881} 4882 4883TypedefDecl *ASTContext::getObjCSelDecl() const { 4884 if (!ObjCSelDecl) { 4885 QualType SelT = getPointerType(ObjCBuiltinSelTy); 4886 TypeSourceInfo *SelInfo = getTrivialTypeSourceInfo(SelT); 4887 ObjCSelDecl = TypedefDecl::Create(const_cast<ASTContext &>(*this), 4888 getTranslationUnitDecl(), 4889 SourceLocation(), SourceLocation(), 4890 &Idents.get("SEL"), SelInfo); 4891 } 4892 return ObjCSelDecl; 4893} 4894 4895TypedefDecl *ASTContext::getObjCClassDecl() const { 4896 if (!ObjCClassDecl) { 4897 QualType T = getObjCObjectType(ObjCBuiltinClassTy, 0, 0); 4898 T = getObjCObjectPointerType(T); 4899 TypeSourceInfo *ClassInfo = getTrivialTypeSourceInfo(T); 4900 ObjCClassDecl = TypedefDecl::Create(const_cast<ASTContext &>(*this), 4901 getTranslationUnitDecl(), 4902 SourceLocation(), SourceLocation(), 4903 &Idents.get("Class"), ClassInfo); 4904 } 4905 4906 return ObjCClassDecl; 4907} 4908 4909ObjCInterfaceDecl *ASTContext::getObjCProtocolDecl() const { 4910 if (!ObjCProtocolClassDecl) { 4911 ObjCProtocolClassDecl 4912 = ObjCInterfaceDecl::Create(*this, getTranslationUnitDecl(), 4913 SourceLocation(), 4914 &Idents.get("Protocol"), 4915 /*PrevDecl=*/0, 4916 SourceLocation(), true); 4917 } 4918 4919 return ObjCProtocolClassDecl; 4920} 4921 4922void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) { 4923 assert(ObjCConstantStringType.isNull() && 4924 "'NSConstantString' type already set!"); 4925 4926 ObjCConstantStringType = getObjCInterfaceType(Decl); 4927} 4928 4929/// \brief Retrieve the template name that corresponds to a non-empty 4930/// lookup. 4931TemplateName 4932ASTContext::getOverloadedTemplateName(UnresolvedSetIterator Begin, 4933 UnresolvedSetIterator End) const { 4934 unsigned size = End - Begin; 4935 assert(size > 1 && "set is not overloaded!"); 4936 4937 void *memory = Allocate(sizeof(OverloadedTemplateStorage) + 4938 size * sizeof(FunctionTemplateDecl*)); 4939 OverloadedTemplateStorage *OT = new(memory) OverloadedTemplateStorage(size); 4940 4941 NamedDecl **Storage = OT->getStorage(); 4942 for (UnresolvedSetIterator I = Begin; I != End; ++I) { 4943 NamedDecl *D = *I; 4944 assert(isa<FunctionTemplateDecl>(D) || 4945 (isa<UsingShadowDecl>(D) && 4946 isa<FunctionTemplateDecl>(D->getUnderlyingDecl()))); 4947 *Storage++ = D; 4948 } 4949 4950 return TemplateName(OT); 4951} 4952 4953/// \brief Retrieve the template name that represents a qualified 4954/// template name such as \c std::vector. 4955TemplateName 4956ASTContext::getQualifiedTemplateName(NestedNameSpecifier *NNS, 4957 bool TemplateKeyword, 4958 TemplateDecl *Template) const { 4959 assert(NNS && "Missing nested-name-specifier in qualified template name"); 4960 4961 // FIXME: Canonicalization? 4962 llvm::FoldingSetNodeID ID; 4963 QualifiedTemplateName::Profile(ID, NNS, TemplateKeyword, Template); 4964 4965 void *InsertPos = 0; 4966 QualifiedTemplateName *QTN = 4967 QualifiedTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4968 if (!QTN) { 4969 QTN = new (*this,4) QualifiedTemplateName(NNS, TemplateKeyword, Template); 4970 QualifiedTemplateNames.InsertNode(QTN, InsertPos); 4971 } 4972 4973 return TemplateName(QTN); 4974} 4975 4976/// \brief Retrieve the template name that represents a dependent 4977/// template name such as \c MetaFun::template apply. 4978TemplateName 4979ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 4980 const IdentifierInfo *Name) const { 4981 assert((!NNS || NNS->isDependent()) && 4982 "Nested name specifier must be dependent"); 4983 4984 llvm::FoldingSetNodeID ID; 4985 DependentTemplateName::Profile(ID, NNS, Name); 4986 4987 void *InsertPos = 0; 4988 DependentTemplateName *QTN = 4989 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4990 4991 if (QTN) 4992 return TemplateName(QTN); 4993 4994 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 4995 if (CanonNNS == NNS) { 4996 QTN = new (*this,4) DependentTemplateName(NNS, Name); 4997 } else { 4998 TemplateName Canon = getDependentTemplateName(CanonNNS, Name); 4999 QTN = new (*this,4) DependentTemplateName(NNS, Name, Canon); 5000 DependentTemplateName *CheckQTN = 5001 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 5002 assert(!CheckQTN && "Dependent type name canonicalization broken"); 5003 (void)CheckQTN; 5004 } 5005 5006 DependentTemplateNames.InsertNode(QTN, InsertPos); 5007 return TemplateName(QTN); 5008} 5009 5010/// \brief Retrieve the template name that represents a dependent 5011/// template name such as \c MetaFun::template operator+. 5012TemplateName 5013ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 5014 OverloadedOperatorKind Operator) const { 5015 assert((!NNS || NNS->isDependent()) && 5016 "Nested name specifier must be dependent"); 5017 5018 llvm::FoldingSetNodeID ID; 5019 DependentTemplateName::Profile(ID, NNS, Operator); 5020 5021 void *InsertPos = 0; 5022 DependentTemplateName *QTN 5023 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 5024 5025 if (QTN) 5026 return TemplateName(QTN); 5027 5028 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 5029 if (CanonNNS == NNS) { 5030 QTN = new (*this,4) DependentTemplateName(NNS, Operator); 5031 } else { 5032 TemplateName Canon = getDependentTemplateName(CanonNNS, Operator); 5033 QTN = new (*this,4) DependentTemplateName(NNS, Operator, Canon); 5034 5035 DependentTemplateName *CheckQTN 5036 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 5037 assert(!CheckQTN && "Dependent template name canonicalization broken"); 5038 (void)CheckQTN; 5039 } 5040 5041 DependentTemplateNames.InsertNode(QTN, InsertPos); 5042 return TemplateName(QTN); 5043} 5044 5045TemplateName 5046ASTContext::getSubstTemplateTemplateParm(TemplateTemplateParmDecl *param, 5047 TemplateName replacement) const { 5048 llvm::FoldingSetNodeID ID; 5049 SubstTemplateTemplateParmStorage::Profile(ID, param, replacement); 5050 5051 void *insertPos = 0; 5052 SubstTemplateTemplateParmStorage *subst 5053 = SubstTemplateTemplateParms.FindNodeOrInsertPos(ID, insertPos); 5054 5055 if (!subst) { 5056 subst = new (*this) SubstTemplateTemplateParmStorage(param, replacement); 5057 SubstTemplateTemplateParms.InsertNode(subst, insertPos); 5058 } 5059 5060 return TemplateName(subst); 5061} 5062 5063TemplateName 5064ASTContext::getSubstTemplateTemplateParmPack(TemplateTemplateParmDecl *Param, 5065 const TemplateArgument &ArgPack) const { 5066 ASTContext &Self = const_cast<ASTContext &>(*this); 5067 llvm::FoldingSetNodeID ID; 5068 SubstTemplateTemplateParmPackStorage::Profile(ID, Self, Param, ArgPack); 5069 5070 void *InsertPos = 0; 5071 SubstTemplateTemplateParmPackStorage *Subst 5072 = SubstTemplateTemplateParmPacks.FindNodeOrInsertPos(ID, InsertPos); 5073 5074 if (!Subst) { 5075 Subst = new (*this) SubstTemplateTemplateParmPackStorage(Param, 5076 ArgPack.pack_size(), 5077 ArgPack.pack_begin()); 5078 SubstTemplateTemplateParmPacks.InsertNode(Subst, InsertPos); 5079 } 5080 5081 return TemplateName(Subst); 5082} 5083 5084/// getFromTargetType - Given one of the integer types provided by 5085/// TargetInfo, produce the corresponding type. The unsigned @p Type 5086/// is actually a value of type @c TargetInfo::IntType. 5087CanQualType ASTContext::getFromTargetType(unsigned Type) const { 5088 switch (Type) { 5089 case TargetInfo::NoInt: return CanQualType(); 5090 case TargetInfo::SignedShort: return ShortTy; 5091 case TargetInfo::UnsignedShort: return UnsignedShortTy; 5092 case TargetInfo::SignedInt: return IntTy; 5093 case TargetInfo::UnsignedInt: return UnsignedIntTy; 5094 case TargetInfo::SignedLong: return LongTy; 5095 case TargetInfo::UnsignedLong: return UnsignedLongTy; 5096 case TargetInfo::SignedLongLong: return LongLongTy; 5097 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy; 5098 } 5099 5100 llvm_unreachable("Unhandled TargetInfo::IntType value"); 5101} 5102 5103//===----------------------------------------------------------------------===// 5104// Type Predicates. 5105//===----------------------------------------------------------------------===// 5106 5107/// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 5108/// garbage collection attribute. 5109/// 5110Qualifiers::GC ASTContext::getObjCGCAttrKind(QualType Ty) const { 5111 if (getLangOptions().getGC() == LangOptions::NonGC) 5112 return Qualifiers::GCNone; 5113 5114 assert(getLangOptions().ObjC1); 5115 Qualifiers::GC GCAttrs = Ty.getObjCGCAttr(); 5116 5117 // Default behaviour under objective-C's gc is for ObjC pointers 5118 // (or pointers to them) be treated as though they were declared 5119 // as __strong. 5120 if (GCAttrs == Qualifiers::GCNone) { 5121 if (Ty->isObjCObjectPointerType() || Ty->isBlockPointerType()) 5122 return Qualifiers::Strong; 5123 else if (Ty->isPointerType()) 5124 return getObjCGCAttrKind(Ty->getAs<PointerType>()->getPointeeType()); 5125 } else { 5126 // It's not valid to set GC attributes on anything that isn't a 5127 // pointer. 5128#ifndef NDEBUG 5129 QualType CT = Ty->getCanonicalTypeInternal(); 5130 while (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 5131 CT = AT->getElementType(); 5132 assert(CT->isAnyPointerType() || CT->isBlockPointerType()); 5133#endif 5134 } 5135 return GCAttrs; 5136} 5137 5138//===----------------------------------------------------------------------===// 5139// Type Compatibility Testing 5140//===----------------------------------------------------------------------===// 5141 5142/// areCompatVectorTypes - Return true if the two specified vector types are 5143/// compatible. 5144static bool areCompatVectorTypes(const VectorType *LHS, 5145 const VectorType *RHS) { 5146 assert(LHS->isCanonicalUnqualified() && RHS->isCanonicalUnqualified()); 5147 return LHS->getElementType() == RHS->getElementType() && 5148 LHS->getNumElements() == RHS->getNumElements(); 5149} 5150 5151bool ASTContext::areCompatibleVectorTypes(QualType FirstVec, 5152 QualType SecondVec) { 5153 assert(FirstVec->isVectorType() && "FirstVec should be a vector type"); 5154 assert(SecondVec->isVectorType() && "SecondVec should be a vector type"); 5155 5156 if (hasSameUnqualifiedType(FirstVec, SecondVec)) 5157 return true; 5158 5159 // Treat Neon vector types and most AltiVec vector types as if they are the 5160 // equivalent GCC vector types. 5161 const VectorType *First = FirstVec->getAs<VectorType>(); 5162 const VectorType *Second = SecondVec->getAs<VectorType>(); 5163 if (First->getNumElements() == Second->getNumElements() && 5164 hasSameType(First->getElementType(), Second->getElementType()) && 5165 First->getVectorKind() != VectorType::AltiVecPixel && 5166 First->getVectorKind() != VectorType::AltiVecBool && 5167 Second->getVectorKind() != VectorType::AltiVecPixel && 5168 Second->getVectorKind() != VectorType::AltiVecBool) 5169 return true; 5170 5171 return false; 5172} 5173 5174//===----------------------------------------------------------------------===// 5175// ObjCQualifiedIdTypesAreCompatible - Compatibility testing for qualified id's. 5176//===----------------------------------------------------------------------===// 5177 5178/// ProtocolCompatibleWithProtocol - return 'true' if 'lProto' is in the 5179/// inheritance hierarchy of 'rProto'. 5180bool 5181ASTContext::ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 5182 ObjCProtocolDecl *rProto) const { 5183 if (declaresSameEntity(lProto, rProto)) 5184 return true; 5185 for (ObjCProtocolDecl::protocol_iterator PI = rProto->protocol_begin(), 5186 E = rProto->protocol_end(); PI != E; ++PI) 5187 if (ProtocolCompatibleWithProtocol(lProto, *PI)) 5188 return true; 5189 return false; 5190} 5191 5192/// QualifiedIdConformsQualifiedId - compare id<p,...> with id<p1,...> 5193/// return true if lhs's protocols conform to rhs's protocol; false 5194/// otherwise. 5195bool ASTContext::QualifiedIdConformsQualifiedId(QualType lhs, QualType rhs) { 5196 if (lhs->isObjCQualifiedIdType() && rhs->isObjCQualifiedIdType()) 5197 return ObjCQualifiedIdTypesAreCompatible(lhs, rhs, false); 5198 return false; 5199} 5200 5201/// ObjCQualifiedClassTypesAreCompatible - compare Class<p,...> and 5202/// Class<p1, ...>. 5203bool ASTContext::ObjCQualifiedClassTypesAreCompatible(QualType lhs, 5204 QualType rhs) { 5205 const ObjCObjectPointerType *lhsQID = lhs->getAs<ObjCObjectPointerType>(); 5206 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 5207 assert ((lhsQID && rhsOPT) && "ObjCQualifiedClassTypesAreCompatible"); 5208 5209 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 5210 E = lhsQID->qual_end(); I != E; ++I) { 5211 bool match = false; 5212 ObjCProtocolDecl *lhsProto = *I; 5213 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 5214 E = rhsOPT->qual_end(); J != E; ++J) { 5215 ObjCProtocolDecl *rhsProto = *J; 5216 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto)) { 5217 match = true; 5218 break; 5219 } 5220 } 5221 if (!match) 5222 return false; 5223 } 5224 return true; 5225} 5226 5227/// ObjCQualifiedIdTypesAreCompatible - We know that one of lhs/rhs is an 5228/// ObjCQualifiedIDType. 5229bool ASTContext::ObjCQualifiedIdTypesAreCompatible(QualType lhs, QualType rhs, 5230 bool compare) { 5231 // Allow id<P..> and an 'id' or void* type in all cases. 5232 if (lhs->isVoidPointerType() || 5233 lhs->isObjCIdType() || lhs->isObjCClassType()) 5234 return true; 5235 else if (rhs->isVoidPointerType() || 5236 rhs->isObjCIdType() || rhs->isObjCClassType()) 5237 return true; 5238 5239 if (const ObjCObjectPointerType *lhsQID = lhs->getAsObjCQualifiedIdType()) { 5240 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 5241 5242 if (!rhsOPT) return false; 5243 5244 if (rhsOPT->qual_empty()) { 5245 // If the RHS is a unqualified interface pointer "NSString*", 5246 // make sure we check the class hierarchy. 5247 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 5248 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 5249 E = lhsQID->qual_end(); I != E; ++I) { 5250 // when comparing an id<P> on lhs with a static type on rhs, 5251 // see if static class implements all of id's protocols, directly or 5252 // through its super class and categories. 5253 if (!rhsID->ClassImplementsProtocol(*I, true)) 5254 return false; 5255 } 5256 } 5257 // If there are no qualifiers and no interface, we have an 'id'. 5258 return true; 5259 } 5260 // Both the right and left sides have qualifiers. 5261 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 5262 E = lhsQID->qual_end(); I != E; ++I) { 5263 ObjCProtocolDecl *lhsProto = *I; 5264 bool match = false; 5265 5266 // when comparing an id<P> on lhs with a static type on rhs, 5267 // see if static class implements all of id's protocols, directly or 5268 // through its super class and categories. 5269 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 5270 E = rhsOPT->qual_end(); J != E; ++J) { 5271 ObjCProtocolDecl *rhsProto = *J; 5272 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 5273 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 5274 match = true; 5275 break; 5276 } 5277 } 5278 // If the RHS is a qualified interface pointer "NSString<P>*", 5279 // make sure we check the class hierarchy. 5280 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 5281 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 5282 E = lhsQID->qual_end(); I != E; ++I) { 5283 // when comparing an id<P> on lhs with a static type on rhs, 5284 // see if static class implements all of id's protocols, directly or 5285 // through its super class and categories. 5286 if (rhsID->ClassImplementsProtocol(*I, true)) { 5287 match = true; 5288 break; 5289 } 5290 } 5291 } 5292 if (!match) 5293 return false; 5294 } 5295 5296 return true; 5297 } 5298 5299 const ObjCObjectPointerType *rhsQID = rhs->getAsObjCQualifiedIdType(); 5300 assert(rhsQID && "One of the LHS/RHS should be id<x>"); 5301 5302 if (const ObjCObjectPointerType *lhsOPT = 5303 lhs->getAsObjCInterfacePointerType()) { 5304 // If both the right and left sides have qualifiers. 5305 for (ObjCObjectPointerType::qual_iterator I = lhsOPT->qual_begin(), 5306 E = lhsOPT->qual_end(); I != E; ++I) { 5307 ObjCProtocolDecl *lhsProto = *I; 5308 bool match = false; 5309 5310 // when comparing an id<P> on rhs with a static type on lhs, 5311 // see if static class implements all of id's protocols, directly or 5312 // through its super class and categories. 5313 // First, lhs protocols in the qualifier list must be found, direct 5314 // or indirect in rhs's qualifier list or it is a mismatch. 5315 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 5316 E = rhsQID->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 (!match) 5325 return false; 5326 } 5327 5328 // Static class's protocols, or its super class or category protocols 5329 // must be found, direct or indirect in rhs's qualifier list or it is a mismatch. 5330 if (ObjCInterfaceDecl *lhsID = lhsOPT->getInterfaceDecl()) { 5331 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 5332 CollectInheritedProtocols(lhsID, LHSInheritedProtocols); 5333 // This is rather dubious but matches gcc's behavior. If lhs has 5334 // no type qualifier and its class has no static protocol(s) 5335 // assume that it is mismatch. 5336 if (LHSInheritedProtocols.empty() && lhsOPT->qual_empty()) 5337 return false; 5338 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 5339 LHSInheritedProtocols.begin(), 5340 E = LHSInheritedProtocols.end(); I != E; ++I) { 5341 bool match = false; 5342 ObjCProtocolDecl *lhsProto = (*I); 5343 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 5344 E = rhsQID->qual_end(); J != E; ++J) { 5345 ObjCProtocolDecl *rhsProto = *J; 5346 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 5347 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 5348 match = true; 5349 break; 5350 } 5351 } 5352 if (!match) 5353 return false; 5354 } 5355 } 5356 return true; 5357 } 5358 return false; 5359} 5360 5361/// canAssignObjCInterfaces - Return true if the two interface types are 5362/// compatible for assignment from RHS to LHS. This handles validation of any 5363/// protocol qualifiers on the LHS or RHS. 5364/// 5365bool ASTContext::canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 5366 const ObjCObjectPointerType *RHSOPT) { 5367 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 5368 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 5369 5370 // If either type represents the built-in 'id' or 'Class' types, return true. 5371 if (LHS->isObjCUnqualifiedIdOrClass() || 5372 RHS->isObjCUnqualifiedIdOrClass()) 5373 return true; 5374 5375 if (LHS->isObjCQualifiedId() || RHS->isObjCQualifiedId()) 5376 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 5377 QualType(RHSOPT,0), 5378 false); 5379 5380 if (LHS->isObjCQualifiedClass() && RHS->isObjCQualifiedClass()) 5381 return ObjCQualifiedClassTypesAreCompatible(QualType(LHSOPT,0), 5382 QualType(RHSOPT,0)); 5383 5384 // If we have 2 user-defined types, fall into that path. 5385 if (LHS->getInterface() && RHS->getInterface()) 5386 return canAssignObjCInterfaces(LHS, RHS); 5387 5388 return false; 5389} 5390 5391/// canAssignObjCInterfacesInBlockPointer - This routine is specifically written 5392/// for providing type-safety for objective-c pointers used to pass/return 5393/// arguments in block literals. When passed as arguments, passing 'A*' where 5394/// 'id' is expected is not OK. Passing 'Sub *" where 'Super *" is expected is 5395/// not OK. For the return type, the opposite is not OK. 5396bool ASTContext::canAssignObjCInterfacesInBlockPointer( 5397 const ObjCObjectPointerType *LHSOPT, 5398 const ObjCObjectPointerType *RHSOPT, 5399 bool BlockReturnType) { 5400 if (RHSOPT->isObjCBuiltinType() || LHSOPT->isObjCIdType()) 5401 return true; 5402 5403 if (LHSOPT->isObjCBuiltinType()) { 5404 return RHSOPT->isObjCBuiltinType() || RHSOPT->isObjCQualifiedIdType(); 5405 } 5406 5407 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 5408 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 5409 QualType(RHSOPT,0), 5410 false); 5411 5412 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 5413 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 5414 if (LHS && RHS) { // We have 2 user-defined types. 5415 if (LHS != RHS) { 5416 if (LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 5417 return BlockReturnType; 5418 if (RHS->getDecl()->isSuperClassOf(LHS->getDecl())) 5419 return !BlockReturnType; 5420 } 5421 else 5422 return true; 5423 } 5424 return false; 5425} 5426 5427/// getIntersectionOfProtocols - This routine finds the intersection of set 5428/// of protocols inherited from two distinct objective-c pointer objects. 5429/// It is used to build composite qualifier list of the composite type of 5430/// the conditional expression involving two objective-c pointer objects. 5431static 5432void getIntersectionOfProtocols(ASTContext &Context, 5433 const ObjCObjectPointerType *LHSOPT, 5434 const ObjCObjectPointerType *RHSOPT, 5435 SmallVectorImpl<ObjCProtocolDecl *> &IntersectionOfProtocols) { 5436 5437 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 5438 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 5439 assert(LHS->getInterface() && "LHS must have an interface base"); 5440 assert(RHS->getInterface() && "RHS must have an interface base"); 5441 5442 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> InheritedProtocolSet; 5443 unsigned LHSNumProtocols = LHS->getNumProtocols(); 5444 if (LHSNumProtocols > 0) 5445 InheritedProtocolSet.insert(LHS->qual_begin(), LHS->qual_end()); 5446 else { 5447 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 5448 Context.CollectInheritedProtocols(LHS->getInterface(), 5449 LHSInheritedProtocols); 5450 InheritedProtocolSet.insert(LHSInheritedProtocols.begin(), 5451 LHSInheritedProtocols.end()); 5452 } 5453 5454 unsigned RHSNumProtocols = RHS->getNumProtocols(); 5455 if (RHSNumProtocols > 0) { 5456 ObjCProtocolDecl **RHSProtocols = 5457 const_cast<ObjCProtocolDecl **>(RHS->qual_begin()); 5458 for (unsigned i = 0; i < RHSNumProtocols; ++i) 5459 if (InheritedProtocolSet.count(RHSProtocols[i])) 5460 IntersectionOfProtocols.push_back(RHSProtocols[i]); 5461 } else { 5462 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> RHSInheritedProtocols; 5463 Context.CollectInheritedProtocols(RHS->getInterface(), 5464 RHSInheritedProtocols); 5465 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 5466 RHSInheritedProtocols.begin(), 5467 E = RHSInheritedProtocols.end(); I != E; ++I) 5468 if (InheritedProtocolSet.count((*I))) 5469 IntersectionOfProtocols.push_back((*I)); 5470 } 5471} 5472 5473/// areCommonBaseCompatible - Returns common base class of the two classes if 5474/// one found. Note that this is O'2 algorithm. But it will be called as the 5475/// last type comparison in a ?-exp of ObjC pointer types before a 5476/// warning is issued. So, its invokation is extremely rare. 5477QualType ASTContext::areCommonBaseCompatible( 5478 const ObjCObjectPointerType *Lptr, 5479 const ObjCObjectPointerType *Rptr) { 5480 const ObjCObjectType *LHS = Lptr->getObjectType(); 5481 const ObjCObjectType *RHS = Rptr->getObjectType(); 5482 const ObjCInterfaceDecl* LDecl = LHS->getInterface(); 5483 const ObjCInterfaceDecl* RDecl = RHS->getInterface(); 5484 if (!LDecl || !RDecl || (declaresSameEntity(LDecl, RDecl))) 5485 return QualType(); 5486 5487 do { 5488 LHS = cast<ObjCInterfaceType>(getObjCInterfaceType(LDecl)); 5489 if (canAssignObjCInterfaces(LHS, RHS)) { 5490 SmallVector<ObjCProtocolDecl *, 8> Protocols; 5491 getIntersectionOfProtocols(*this, Lptr, Rptr, Protocols); 5492 5493 QualType Result = QualType(LHS, 0); 5494 if (!Protocols.empty()) 5495 Result = getObjCObjectType(Result, Protocols.data(), Protocols.size()); 5496 Result = getObjCObjectPointerType(Result); 5497 return Result; 5498 } 5499 } while ((LDecl = LDecl->getSuperClass())); 5500 5501 return QualType(); 5502} 5503 5504bool ASTContext::canAssignObjCInterfaces(const ObjCObjectType *LHS, 5505 const ObjCObjectType *RHS) { 5506 assert(LHS->getInterface() && "LHS is not an interface type"); 5507 assert(RHS->getInterface() && "RHS is not an interface type"); 5508 5509 // Verify that the base decls are compatible: the RHS must be a subclass of 5510 // the LHS. 5511 if (!LHS->getInterface()->isSuperClassOf(RHS->getInterface())) 5512 return false; 5513 5514 // RHS must have a superset of the protocols in the LHS. If the LHS is not 5515 // protocol qualified at all, then we are good. 5516 if (LHS->getNumProtocols() == 0) 5517 return true; 5518 5519 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, 5520 // more detailed analysis is required. 5521 if (RHS->getNumProtocols() == 0) { 5522 // OK, if LHS is a superclass of RHS *and* 5523 // this superclass is assignment compatible with LHS. 5524 // false otherwise. 5525 bool IsSuperClass = 5526 LHS->getInterface()->isSuperClassOf(RHS->getInterface()); 5527 if (IsSuperClass) { 5528 // OK if conversion of LHS to SuperClass results in narrowing of types 5529 // ; i.e., SuperClass may implement at least one of the protocols 5530 // in LHS's protocol list. Example, SuperObj<P1> = lhs<P1,P2> is ok. 5531 // But not SuperObj<P1,P2,P3> = lhs<P1,P2>. 5532 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> SuperClassInheritedProtocols; 5533 CollectInheritedProtocols(RHS->getInterface(), SuperClassInheritedProtocols); 5534 // If super class has no protocols, it is not a match. 5535 if (SuperClassInheritedProtocols.empty()) 5536 return false; 5537 5538 for (ObjCObjectType::qual_iterator LHSPI = LHS->qual_begin(), 5539 LHSPE = LHS->qual_end(); 5540 LHSPI != LHSPE; LHSPI++) { 5541 bool SuperImplementsProtocol = false; 5542 ObjCProtocolDecl *LHSProto = (*LHSPI); 5543 5544 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 5545 SuperClassInheritedProtocols.begin(), 5546 E = SuperClassInheritedProtocols.end(); I != E; ++I) { 5547 ObjCProtocolDecl *SuperClassProto = (*I); 5548 if (SuperClassProto->lookupProtocolNamed(LHSProto->getIdentifier())) { 5549 SuperImplementsProtocol = true; 5550 break; 5551 } 5552 } 5553 if (!SuperImplementsProtocol) 5554 return false; 5555 } 5556 return true; 5557 } 5558 return false; 5559 } 5560 5561 for (ObjCObjectType::qual_iterator LHSPI = LHS->qual_begin(), 5562 LHSPE = LHS->qual_end(); 5563 LHSPI != LHSPE; LHSPI++) { 5564 bool RHSImplementsProtocol = false; 5565 5566 // If the RHS doesn't implement the protocol on the left, the types 5567 // are incompatible. 5568 for (ObjCObjectType::qual_iterator RHSPI = RHS->qual_begin(), 5569 RHSPE = RHS->qual_end(); 5570 RHSPI != RHSPE; RHSPI++) { 5571 if ((*RHSPI)->lookupProtocolNamed((*LHSPI)->getIdentifier())) { 5572 RHSImplementsProtocol = true; 5573 break; 5574 } 5575 } 5576 // FIXME: For better diagnostics, consider passing back the protocol name. 5577 if (!RHSImplementsProtocol) 5578 return false; 5579 } 5580 // The RHS implements all protocols listed on the LHS. 5581 return true; 5582} 5583 5584bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) { 5585 // get the "pointed to" types 5586 const ObjCObjectPointerType *LHSOPT = LHS->getAs<ObjCObjectPointerType>(); 5587 const ObjCObjectPointerType *RHSOPT = RHS->getAs<ObjCObjectPointerType>(); 5588 5589 if (!LHSOPT || !RHSOPT) 5590 return false; 5591 5592 return canAssignObjCInterfaces(LHSOPT, RHSOPT) || 5593 canAssignObjCInterfaces(RHSOPT, LHSOPT); 5594} 5595 5596bool ASTContext::canBindObjCObjectType(QualType To, QualType From) { 5597 return canAssignObjCInterfaces( 5598 getObjCObjectPointerType(To)->getAs<ObjCObjectPointerType>(), 5599 getObjCObjectPointerType(From)->getAs<ObjCObjectPointerType>()); 5600} 5601 5602/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible, 5603/// both shall have the identically qualified version of a compatible type. 5604/// C99 6.2.7p1: Two types have compatible types if their types are the 5605/// same. See 6.7.[2,3,5] for additional rules. 5606bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS, 5607 bool CompareUnqualified) { 5608 if (getLangOptions().CPlusPlus) 5609 return hasSameType(LHS, RHS); 5610 5611 return !mergeTypes(LHS, RHS, false, CompareUnqualified).isNull(); 5612} 5613 5614bool ASTContext::propertyTypesAreCompatible(QualType LHS, QualType RHS) { 5615 return typesAreCompatible(LHS, RHS); 5616} 5617 5618bool ASTContext::typesAreBlockPointerCompatible(QualType LHS, QualType RHS) { 5619 return !mergeTypes(LHS, RHS, true).isNull(); 5620} 5621 5622/// mergeTransparentUnionType - if T is a transparent union type and a member 5623/// of T is compatible with SubType, return the merged type, else return 5624/// QualType() 5625QualType ASTContext::mergeTransparentUnionType(QualType T, QualType SubType, 5626 bool OfBlockPointer, 5627 bool Unqualified) { 5628 if (const RecordType *UT = T->getAsUnionType()) { 5629 RecordDecl *UD = UT->getDecl(); 5630 if (UD->hasAttr<TransparentUnionAttr>()) { 5631 for (RecordDecl::field_iterator it = UD->field_begin(), 5632 itend = UD->field_end(); it != itend; ++it) { 5633 QualType ET = it->getType().getUnqualifiedType(); 5634 QualType MT = mergeTypes(ET, SubType, OfBlockPointer, Unqualified); 5635 if (!MT.isNull()) 5636 return MT; 5637 } 5638 } 5639 } 5640 5641 return QualType(); 5642} 5643 5644/// mergeFunctionArgumentTypes - merge two types which appear as function 5645/// argument types 5646QualType ASTContext::mergeFunctionArgumentTypes(QualType lhs, QualType rhs, 5647 bool OfBlockPointer, 5648 bool Unqualified) { 5649 // GNU extension: two types are compatible if they appear as a function 5650 // argument, one of the types is a transparent union type and the other 5651 // type is compatible with a union member 5652 QualType lmerge = mergeTransparentUnionType(lhs, rhs, OfBlockPointer, 5653 Unqualified); 5654 if (!lmerge.isNull()) 5655 return lmerge; 5656 5657 QualType rmerge = mergeTransparentUnionType(rhs, lhs, OfBlockPointer, 5658 Unqualified); 5659 if (!rmerge.isNull()) 5660 return rmerge; 5661 5662 return mergeTypes(lhs, rhs, OfBlockPointer, Unqualified); 5663} 5664 5665QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs, 5666 bool OfBlockPointer, 5667 bool Unqualified) { 5668 const FunctionType *lbase = lhs->getAs<FunctionType>(); 5669 const FunctionType *rbase = rhs->getAs<FunctionType>(); 5670 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 5671 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 5672 bool allLTypes = true; 5673 bool allRTypes = true; 5674 5675 // Check return type 5676 QualType retType; 5677 if (OfBlockPointer) { 5678 QualType RHS = rbase->getResultType(); 5679 QualType LHS = lbase->getResultType(); 5680 bool UnqualifiedResult = Unqualified; 5681 if (!UnqualifiedResult) 5682 UnqualifiedResult = (!RHS.hasQualifiers() && LHS.hasQualifiers()); 5683 retType = mergeTypes(LHS, RHS, true, UnqualifiedResult, true); 5684 } 5685 else 5686 retType = mergeTypes(lbase->getResultType(), rbase->getResultType(), false, 5687 Unqualified); 5688 if (retType.isNull()) return QualType(); 5689 5690 if (Unqualified) 5691 retType = retType.getUnqualifiedType(); 5692 5693 CanQualType LRetType = getCanonicalType(lbase->getResultType()); 5694 CanQualType RRetType = getCanonicalType(rbase->getResultType()); 5695 if (Unqualified) { 5696 LRetType = LRetType.getUnqualifiedType(); 5697 RRetType = RRetType.getUnqualifiedType(); 5698 } 5699 5700 if (getCanonicalType(retType) != LRetType) 5701 allLTypes = false; 5702 if (getCanonicalType(retType) != RRetType) 5703 allRTypes = false; 5704 5705 // FIXME: double check this 5706 // FIXME: should we error if lbase->getRegParmAttr() != 0 && 5707 // rbase->getRegParmAttr() != 0 && 5708 // lbase->getRegParmAttr() != rbase->getRegParmAttr()? 5709 FunctionType::ExtInfo lbaseInfo = lbase->getExtInfo(); 5710 FunctionType::ExtInfo rbaseInfo = rbase->getExtInfo(); 5711 5712 // Compatible functions must have compatible calling conventions 5713 if (!isSameCallConv(lbaseInfo.getCC(), rbaseInfo.getCC())) 5714 return QualType(); 5715 5716 // Regparm is part of the calling convention. 5717 if (lbaseInfo.getHasRegParm() != rbaseInfo.getHasRegParm()) 5718 return QualType(); 5719 if (lbaseInfo.getRegParm() != rbaseInfo.getRegParm()) 5720 return QualType(); 5721 5722 if (lbaseInfo.getProducesResult() != rbaseInfo.getProducesResult()) 5723 return QualType(); 5724 5725 // functypes which return are preferred over those that do not. 5726 if (lbaseInfo.getNoReturn() && !rbaseInfo.getNoReturn()) 5727 allLTypes = false; 5728 else if (!lbaseInfo.getNoReturn() && rbaseInfo.getNoReturn()) 5729 allRTypes = false; 5730 // FIXME: some uses, e.g. conditional exprs, really want this to be 'both'. 5731 bool NoReturn = lbaseInfo.getNoReturn() || rbaseInfo.getNoReturn(); 5732 5733 FunctionType::ExtInfo einfo = lbaseInfo.withNoReturn(NoReturn); 5734 5735 if (lproto && rproto) { // two C99 style function prototypes 5736 assert(!lproto->hasExceptionSpec() && !rproto->hasExceptionSpec() && 5737 "C++ shouldn't be here"); 5738 unsigned lproto_nargs = lproto->getNumArgs(); 5739 unsigned rproto_nargs = rproto->getNumArgs(); 5740 5741 // Compatible functions must have the same number of arguments 5742 if (lproto_nargs != rproto_nargs) 5743 return QualType(); 5744 5745 // Variadic and non-variadic functions aren't compatible 5746 if (lproto->isVariadic() != rproto->isVariadic()) 5747 return QualType(); 5748 5749 if (lproto->getTypeQuals() != rproto->getTypeQuals()) 5750 return QualType(); 5751 5752 if (LangOpts.ObjCAutoRefCount && 5753 !FunctionTypesMatchOnNSConsumedAttrs(rproto, lproto)) 5754 return QualType(); 5755 5756 // Check argument compatibility 5757 SmallVector<QualType, 10> types; 5758 for (unsigned i = 0; i < lproto_nargs; i++) { 5759 QualType largtype = lproto->getArgType(i).getUnqualifiedType(); 5760 QualType rargtype = rproto->getArgType(i).getUnqualifiedType(); 5761 QualType argtype = mergeFunctionArgumentTypes(largtype, rargtype, 5762 OfBlockPointer, 5763 Unqualified); 5764 if (argtype.isNull()) return QualType(); 5765 5766 if (Unqualified) 5767 argtype = argtype.getUnqualifiedType(); 5768 5769 types.push_back(argtype); 5770 if (Unqualified) { 5771 largtype = largtype.getUnqualifiedType(); 5772 rargtype = rargtype.getUnqualifiedType(); 5773 } 5774 5775 if (getCanonicalType(argtype) != getCanonicalType(largtype)) 5776 allLTypes = false; 5777 if (getCanonicalType(argtype) != getCanonicalType(rargtype)) 5778 allRTypes = false; 5779 } 5780 5781 if (allLTypes) return lhs; 5782 if (allRTypes) return rhs; 5783 5784 FunctionProtoType::ExtProtoInfo EPI = lproto->getExtProtoInfo(); 5785 EPI.ExtInfo = einfo; 5786 return getFunctionType(retType, types.begin(), types.size(), EPI); 5787 } 5788 5789 if (lproto) allRTypes = false; 5790 if (rproto) allLTypes = false; 5791 5792 const FunctionProtoType *proto = lproto ? lproto : rproto; 5793 if (proto) { 5794 assert(!proto->hasExceptionSpec() && "C++ shouldn't be here"); 5795 if (proto->isVariadic()) return QualType(); 5796 // Check that the types are compatible with the types that 5797 // would result from default argument promotions (C99 6.7.5.3p15). 5798 // The only types actually affected are promotable integer 5799 // types and floats, which would be passed as a different 5800 // type depending on whether the prototype is visible. 5801 unsigned proto_nargs = proto->getNumArgs(); 5802 for (unsigned i = 0; i < proto_nargs; ++i) { 5803 QualType argTy = proto->getArgType(i); 5804 5805 // Look at the promotion type of enum types, since that is the type used 5806 // to pass enum values. 5807 if (const EnumType *Enum = argTy->getAs<EnumType>()) 5808 argTy = Enum->getDecl()->getPromotionType(); 5809 5810 if (argTy->isPromotableIntegerType() || 5811 getCanonicalType(argTy).getUnqualifiedType() == FloatTy) 5812 return QualType(); 5813 } 5814 5815 if (allLTypes) return lhs; 5816 if (allRTypes) return rhs; 5817 5818 FunctionProtoType::ExtProtoInfo EPI = proto->getExtProtoInfo(); 5819 EPI.ExtInfo = einfo; 5820 return getFunctionType(retType, proto->arg_type_begin(), 5821 proto->getNumArgs(), EPI); 5822 } 5823 5824 if (allLTypes) return lhs; 5825 if (allRTypes) return rhs; 5826 return getFunctionNoProtoType(retType, einfo); 5827} 5828 5829QualType ASTContext::mergeTypes(QualType LHS, QualType RHS, 5830 bool OfBlockPointer, 5831 bool Unqualified, bool BlockReturnType) { 5832 // C++ [expr]: If an expression initially has the type "reference to T", the 5833 // type is adjusted to "T" prior to any further analysis, the expression 5834 // designates the object or function denoted by the reference, and the 5835 // expression is an lvalue unless the reference is an rvalue reference and 5836 // the expression is a function call (possibly inside parentheses). 5837 assert(!LHS->getAs<ReferenceType>() && "LHS is a reference type?"); 5838 assert(!RHS->getAs<ReferenceType>() && "RHS is a reference type?"); 5839 5840 if (Unqualified) { 5841 LHS = LHS.getUnqualifiedType(); 5842 RHS = RHS.getUnqualifiedType(); 5843 } 5844 5845 QualType LHSCan = getCanonicalType(LHS), 5846 RHSCan = getCanonicalType(RHS); 5847 5848 // If two types are identical, they are compatible. 5849 if (LHSCan == RHSCan) 5850 return LHS; 5851 5852 // If the qualifiers are different, the types aren't compatible... mostly. 5853 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 5854 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 5855 if (LQuals != RQuals) { 5856 // If any of these qualifiers are different, we have a type 5857 // mismatch. 5858 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 5859 LQuals.getAddressSpace() != RQuals.getAddressSpace() || 5860 LQuals.getObjCLifetime() != RQuals.getObjCLifetime()) 5861 return QualType(); 5862 5863 // Exactly one GC qualifier difference is allowed: __strong is 5864 // okay if the other type has no GC qualifier but is an Objective 5865 // C object pointer (i.e. implicitly strong by default). We fix 5866 // this by pretending that the unqualified type was actually 5867 // qualified __strong. 5868 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 5869 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 5870 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 5871 5872 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 5873 return QualType(); 5874 5875 if (GC_L == Qualifiers::Strong && RHSCan->isObjCObjectPointerType()) { 5876 return mergeTypes(LHS, getObjCGCQualType(RHS, Qualifiers::Strong)); 5877 } 5878 if (GC_R == Qualifiers::Strong && LHSCan->isObjCObjectPointerType()) { 5879 return mergeTypes(getObjCGCQualType(LHS, Qualifiers::Strong), RHS); 5880 } 5881 return QualType(); 5882 } 5883 5884 // Okay, qualifiers are equal. 5885 5886 Type::TypeClass LHSClass = LHSCan->getTypeClass(); 5887 Type::TypeClass RHSClass = RHSCan->getTypeClass(); 5888 5889 // We want to consider the two function types to be the same for these 5890 // comparisons, just force one to the other. 5891 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto; 5892 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto; 5893 5894 // Same as above for arrays 5895 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray) 5896 LHSClass = Type::ConstantArray; 5897 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray) 5898 RHSClass = Type::ConstantArray; 5899 5900 // ObjCInterfaces are just specialized ObjCObjects. 5901 if (LHSClass == Type::ObjCInterface) LHSClass = Type::ObjCObject; 5902 if (RHSClass == Type::ObjCInterface) RHSClass = Type::ObjCObject; 5903 5904 // Canonicalize ExtVector -> Vector. 5905 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector; 5906 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector; 5907 5908 // If the canonical type classes don't match. 5909 if (LHSClass != RHSClass) { 5910 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char, 5911 // a signed integer type, or an unsigned integer type. 5912 // Compatibility is based on the underlying type, not the promotion 5913 // type. 5914 if (const EnumType* ETy = LHS->getAs<EnumType>()) { 5915 QualType TINT = ETy->getDecl()->getIntegerType(); 5916 if (!TINT.isNull() && hasSameType(TINT, RHSCan.getUnqualifiedType())) 5917 return RHS; 5918 } 5919 if (const EnumType* ETy = RHS->getAs<EnumType>()) { 5920 QualType TINT = ETy->getDecl()->getIntegerType(); 5921 if (!TINT.isNull() && hasSameType(TINT, LHSCan.getUnqualifiedType())) 5922 return LHS; 5923 } 5924 // allow block pointer type to match an 'id' type. 5925 if (OfBlockPointer && !BlockReturnType) { 5926 if (LHS->isObjCIdType() && RHS->isBlockPointerType()) 5927 return LHS; 5928 if (RHS->isObjCIdType() && LHS->isBlockPointerType()) 5929 return RHS; 5930 } 5931 5932 return QualType(); 5933 } 5934 5935 // The canonical type classes match. 5936 switch (LHSClass) { 5937#define TYPE(Class, Base) 5938#define ABSTRACT_TYPE(Class, Base) 5939#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) case Type::Class: 5940#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 5941#define DEPENDENT_TYPE(Class, Base) case Type::Class: 5942#include "clang/AST/TypeNodes.def" 5943 llvm_unreachable("Non-canonical and dependent types shouldn't get here"); 5944 5945 case Type::LValueReference: 5946 case Type::RValueReference: 5947 case Type::MemberPointer: 5948 llvm_unreachable("C++ should never be in mergeTypes"); 5949 5950 case Type::ObjCInterface: 5951 case Type::IncompleteArray: 5952 case Type::VariableArray: 5953 case Type::FunctionProto: 5954 case Type::ExtVector: 5955 llvm_unreachable("Types are eliminated above"); 5956 5957 case Type::Pointer: 5958 { 5959 // Merge two pointer types, while trying to preserve typedef info 5960 QualType LHSPointee = LHS->getAs<PointerType>()->getPointeeType(); 5961 QualType RHSPointee = RHS->getAs<PointerType>()->getPointeeType(); 5962 if (Unqualified) { 5963 LHSPointee = LHSPointee.getUnqualifiedType(); 5964 RHSPointee = RHSPointee.getUnqualifiedType(); 5965 } 5966 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, false, 5967 Unqualified); 5968 if (ResultType.isNull()) return QualType(); 5969 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 5970 return LHS; 5971 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 5972 return RHS; 5973 return getPointerType(ResultType); 5974 } 5975 case Type::BlockPointer: 5976 { 5977 // Merge two block pointer types, while trying to preserve typedef info 5978 QualType LHSPointee = LHS->getAs<BlockPointerType>()->getPointeeType(); 5979 QualType RHSPointee = RHS->getAs<BlockPointerType>()->getPointeeType(); 5980 if (Unqualified) { 5981 LHSPointee = LHSPointee.getUnqualifiedType(); 5982 RHSPointee = RHSPointee.getUnqualifiedType(); 5983 } 5984 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, OfBlockPointer, 5985 Unqualified); 5986 if (ResultType.isNull()) return QualType(); 5987 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 5988 return LHS; 5989 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 5990 return RHS; 5991 return getBlockPointerType(ResultType); 5992 } 5993 case Type::Atomic: 5994 { 5995 // Merge two pointer types, while trying to preserve typedef info 5996 QualType LHSValue = LHS->getAs<AtomicType>()->getValueType(); 5997 QualType RHSValue = RHS->getAs<AtomicType>()->getValueType(); 5998 if (Unqualified) { 5999 LHSValue = LHSValue.getUnqualifiedType(); 6000 RHSValue = RHSValue.getUnqualifiedType(); 6001 } 6002 QualType ResultType = mergeTypes(LHSValue, RHSValue, false, 6003 Unqualified); 6004 if (ResultType.isNull()) return QualType(); 6005 if (getCanonicalType(LHSValue) == getCanonicalType(ResultType)) 6006 return LHS; 6007 if (getCanonicalType(RHSValue) == getCanonicalType(ResultType)) 6008 return RHS; 6009 return getAtomicType(ResultType); 6010 } 6011 case Type::ConstantArray: 6012 { 6013 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS); 6014 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS); 6015 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize()) 6016 return QualType(); 6017 6018 QualType LHSElem = getAsArrayType(LHS)->getElementType(); 6019 QualType RHSElem = getAsArrayType(RHS)->getElementType(); 6020 if (Unqualified) { 6021 LHSElem = LHSElem.getUnqualifiedType(); 6022 RHSElem = RHSElem.getUnqualifiedType(); 6023 } 6024 6025 QualType ResultType = mergeTypes(LHSElem, RHSElem, false, Unqualified); 6026 if (ResultType.isNull()) return QualType(); 6027 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 6028 return LHS; 6029 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 6030 return RHS; 6031 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(), 6032 ArrayType::ArraySizeModifier(), 0); 6033 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(), 6034 ArrayType::ArraySizeModifier(), 0); 6035 const VariableArrayType* LVAT = getAsVariableArrayType(LHS); 6036 const VariableArrayType* RVAT = getAsVariableArrayType(RHS); 6037 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 6038 return LHS; 6039 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 6040 return RHS; 6041 if (LVAT) { 6042 // FIXME: This isn't correct! But tricky to implement because 6043 // the array's size has to be the size of LHS, but the type 6044 // has to be different. 6045 return LHS; 6046 } 6047 if (RVAT) { 6048 // FIXME: This isn't correct! But tricky to implement because 6049 // the array's size has to be the size of RHS, but the type 6050 // has to be different. 6051 return RHS; 6052 } 6053 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS; 6054 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS; 6055 return getIncompleteArrayType(ResultType, 6056 ArrayType::ArraySizeModifier(), 0); 6057 } 6058 case Type::FunctionNoProto: 6059 return mergeFunctionTypes(LHS, RHS, OfBlockPointer, Unqualified); 6060 case Type::Record: 6061 case Type::Enum: 6062 return QualType(); 6063 case Type::Builtin: 6064 // Only exactly equal builtin types are compatible, which is tested above. 6065 return QualType(); 6066 case Type::Complex: 6067 // Distinct complex types are incompatible. 6068 return QualType(); 6069 case Type::Vector: 6070 // FIXME: The merged type should be an ExtVector! 6071 if (areCompatVectorTypes(LHSCan->getAs<VectorType>(), 6072 RHSCan->getAs<VectorType>())) 6073 return LHS; 6074 return QualType(); 6075 case Type::ObjCObject: { 6076 // Check if the types are assignment compatible. 6077 // FIXME: This should be type compatibility, e.g. whether 6078 // "LHS x; RHS x;" at global scope is legal. 6079 const ObjCObjectType* LHSIface = LHS->getAs<ObjCObjectType>(); 6080 const ObjCObjectType* RHSIface = RHS->getAs<ObjCObjectType>(); 6081 if (canAssignObjCInterfaces(LHSIface, RHSIface)) 6082 return LHS; 6083 6084 return QualType(); 6085 } 6086 case Type::ObjCObjectPointer: { 6087 if (OfBlockPointer) { 6088 if (canAssignObjCInterfacesInBlockPointer( 6089 LHS->getAs<ObjCObjectPointerType>(), 6090 RHS->getAs<ObjCObjectPointerType>(), 6091 BlockReturnType)) 6092 return LHS; 6093 return QualType(); 6094 } 6095 if (canAssignObjCInterfaces(LHS->getAs<ObjCObjectPointerType>(), 6096 RHS->getAs<ObjCObjectPointerType>())) 6097 return LHS; 6098 6099 return QualType(); 6100 } 6101 } 6102 6103 llvm_unreachable("Invalid Type::Class!"); 6104} 6105 6106bool ASTContext::FunctionTypesMatchOnNSConsumedAttrs( 6107 const FunctionProtoType *FromFunctionType, 6108 const FunctionProtoType *ToFunctionType) { 6109 if (FromFunctionType->hasAnyConsumedArgs() != 6110 ToFunctionType->hasAnyConsumedArgs()) 6111 return false; 6112 FunctionProtoType::ExtProtoInfo FromEPI = 6113 FromFunctionType->getExtProtoInfo(); 6114 FunctionProtoType::ExtProtoInfo ToEPI = 6115 ToFunctionType->getExtProtoInfo(); 6116 if (FromEPI.ConsumedArguments && ToEPI.ConsumedArguments) 6117 for (unsigned ArgIdx = 0, NumArgs = FromFunctionType->getNumArgs(); 6118 ArgIdx != NumArgs; ++ArgIdx) { 6119 if (FromEPI.ConsumedArguments[ArgIdx] != 6120 ToEPI.ConsumedArguments[ArgIdx]) 6121 return false; 6122 } 6123 return true; 6124} 6125 6126/// mergeObjCGCQualifiers - This routine merges ObjC's GC attribute of 'LHS' and 6127/// 'RHS' attributes and returns the merged version; including for function 6128/// return types. 6129QualType ASTContext::mergeObjCGCQualifiers(QualType LHS, QualType RHS) { 6130 QualType LHSCan = getCanonicalType(LHS), 6131 RHSCan = getCanonicalType(RHS); 6132 // If two types are identical, they are compatible. 6133 if (LHSCan == RHSCan) 6134 return LHS; 6135 if (RHSCan->isFunctionType()) { 6136 if (!LHSCan->isFunctionType()) 6137 return QualType(); 6138 QualType OldReturnType = 6139 cast<FunctionType>(RHSCan.getTypePtr())->getResultType(); 6140 QualType NewReturnType = 6141 cast<FunctionType>(LHSCan.getTypePtr())->getResultType(); 6142 QualType ResReturnType = 6143 mergeObjCGCQualifiers(NewReturnType, OldReturnType); 6144 if (ResReturnType.isNull()) 6145 return QualType(); 6146 if (ResReturnType == NewReturnType || ResReturnType == OldReturnType) { 6147 // id foo(); ... __strong id foo(); or: __strong id foo(); ... id foo(); 6148 // In either case, use OldReturnType to build the new function type. 6149 const FunctionType *F = LHS->getAs<FunctionType>(); 6150 if (const FunctionProtoType *FPT = cast<FunctionProtoType>(F)) { 6151 FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); 6152 EPI.ExtInfo = getFunctionExtInfo(LHS); 6153 QualType ResultType 6154 = getFunctionType(OldReturnType, FPT->arg_type_begin(), 6155 FPT->getNumArgs(), EPI); 6156 return ResultType; 6157 } 6158 } 6159 return QualType(); 6160 } 6161 6162 // If the qualifiers are different, the types can still be merged. 6163 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 6164 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 6165 if (LQuals != RQuals) { 6166 // If any of these qualifiers are different, we have a type mismatch. 6167 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 6168 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 6169 return QualType(); 6170 6171 // Exactly one GC qualifier difference is allowed: __strong is 6172 // okay if the other type has no GC qualifier but is an Objective 6173 // C object pointer (i.e. implicitly strong by default). We fix 6174 // this by pretending that the unqualified type was actually 6175 // qualified __strong. 6176 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 6177 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 6178 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 6179 6180 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 6181 return QualType(); 6182 6183 if (GC_L == Qualifiers::Strong) 6184 return LHS; 6185 if (GC_R == Qualifiers::Strong) 6186 return RHS; 6187 return QualType(); 6188 } 6189 6190 if (LHSCan->isObjCObjectPointerType() && RHSCan->isObjCObjectPointerType()) { 6191 QualType LHSBaseQT = LHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 6192 QualType RHSBaseQT = RHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 6193 QualType ResQT = mergeObjCGCQualifiers(LHSBaseQT, RHSBaseQT); 6194 if (ResQT == LHSBaseQT) 6195 return LHS; 6196 if (ResQT == RHSBaseQT) 6197 return RHS; 6198 } 6199 return QualType(); 6200} 6201 6202//===----------------------------------------------------------------------===// 6203// Integer Predicates 6204//===----------------------------------------------------------------------===// 6205 6206unsigned ASTContext::getIntWidth(QualType T) const { 6207 if (const EnumType *ET = dyn_cast<EnumType>(T)) 6208 T = ET->getDecl()->getIntegerType(); 6209 if (T->isBooleanType()) 6210 return 1; 6211 // For builtin types, just use the standard type sizing method 6212 return (unsigned)getTypeSize(T); 6213} 6214 6215QualType ASTContext::getCorrespondingUnsignedType(QualType T) { 6216 assert(T->hasSignedIntegerRepresentation() && "Unexpected type"); 6217 6218 // Turn <4 x signed int> -> <4 x unsigned int> 6219 if (const VectorType *VTy = T->getAs<VectorType>()) 6220 return getVectorType(getCorrespondingUnsignedType(VTy->getElementType()), 6221 VTy->getNumElements(), VTy->getVectorKind()); 6222 6223 // For enums, we return the unsigned version of the base type. 6224 if (const EnumType *ETy = T->getAs<EnumType>()) 6225 T = ETy->getDecl()->getIntegerType(); 6226 6227 const BuiltinType *BTy = T->getAs<BuiltinType>(); 6228 assert(BTy && "Unexpected signed integer type"); 6229 switch (BTy->getKind()) { 6230 case BuiltinType::Char_S: 6231 case BuiltinType::SChar: 6232 return UnsignedCharTy; 6233 case BuiltinType::Short: 6234 return UnsignedShortTy; 6235 case BuiltinType::Int: 6236 return UnsignedIntTy; 6237 case BuiltinType::Long: 6238 return UnsignedLongTy; 6239 case BuiltinType::LongLong: 6240 return UnsignedLongLongTy; 6241 case BuiltinType::Int128: 6242 return UnsignedInt128Ty; 6243 default: 6244 llvm_unreachable("Unexpected signed integer type"); 6245 } 6246} 6247 6248ASTMutationListener::~ASTMutationListener() { } 6249 6250 6251//===----------------------------------------------------------------------===// 6252// Builtin Type Computation 6253//===----------------------------------------------------------------------===// 6254 6255/// DecodeTypeFromStr - This decodes one type descriptor from Str, advancing the 6256/// pointer over the consumed characters. This returns the resultant type. If 6257/// AllowTypeModifiers is false then modifier like * are not parsed, just basic 6258/// types. This allows "v2i*" to be parsed as a pointer to a v2i instead of 6259/// a vector of "i*". 6260/// 6261/// RequiresICE is filled in on return to indicate whether the value is required 6262/// to be an Integer Constant Expression. 6263static QualType DecodeTypeFromStr(const char *&Str, const ASTContext &Context, 6264 ASTContext::GetBuiltinTypeError &Error, 6265 bool &RequiresICE, 6266 bool AllowTypeModifiers) { 6267 // Modifiers. 6268 int HowLong = 0; 6269 bool Signed = false, Unsigned = false; 6270 RequiresICE = false; 6271 6272 // Read the prefixed modifiers first. 6273 bool Done = false; 6274 while (!Done) { 6275 switch (*Str++) { 6276 default: Done = true; --Str; break; 6277 case 'I': 6278 RequiresICE = true; 6279 break; 6280 case 'S': 6281 assert(!Unsigned && "Can't use both 'S' and 'U' modifiers!"); 6282 assert(!Signed && "Can't use 'S' modifier multiple times!"); 6283 Signed = true; 6284 break; 6285 case 'U': 6286 assert(!Signed && "Can't use both 'S' and 'U' modifiers!"); 6287 assert(!Unsigned && "Can't use 'S' modifier multiple times!"); 6288 Unsigned = true; 6289 break; 6290 case 'L': 6291 assert(HowLong <= 2 && "Can't have LLLL modifier"); 6292 ++HowLong; 6293 break; 6294 } 6295 } 6296 6297 QualType Type; 6298 6299 // Read the base type. 6300 switch (*Str++) { 6301 default: llvm_unreachable("Unknown builtin type letter!"); 6302 case 'v': 6303 assert(HowLong == 0 && !Signed && !Unsigned && 6304 "Bad modifiers used with 'v'!"); 6305 Type = Context.VoidTy; 6306 break; 6307 case 'f': 6308 assert(HowLong == 0 && !Signed && !Unsigned && 6309 "Bad modifiers used with 'f'!"); 6310 Type = Context.FloatTy; 6311 break; 6312 case 'd': 6313 assert(HowLong < 2 && !Signed && !Unsigned && 6314 "Bad modifiers used with 'd'!"); 6315 if (HowLong) 6316 Type = Context.LongDoubleTy; 6317 else 6318 Type = Context.DoubleTy; 6319 break; 6320 case 's': 6321 assert(HowLong == 0 && "Bad modifiers used with 's'!"); 6322 if (Unsigned) 6323 Type = Context.UnsignedShortTy; 6324 else 6325 Type = Context.ShortTy; 6326 break; 6327 case 'i': 6328 if (HowLong == 3) 6329 Type = Unsigned ? Context.UnsignedInt128Ty : Context.Int128Ty; 6330 else if (HowLong == 2) 6331 Type = Unsigned ? Context.UnsignedLongLongTy : Context.LongLongTy; 6332 else if (HowLong == 1) 6333 Type = Unsigned ? Context.UnsignedLongTy : Context.LongTy; 6334 else 6335 Type = Unsigned ? Context.UnsignedIntTy : Context.IntTy; 6336 break; 6337 case 'c': 6338 assert(HowLong == 0 && "Bad modifiers used with 'c'!"); 6339 if (Signed) 6340 Type = Context.SignedCharTy; 6341 else if (Unsigned) 6342 Type = Context.UnsignedCharTy; 6343 else 6344 Type = Context.CharTy; 6345 break; 6346 case 'b': // boolean 6347 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'b'!"); 6348 Type = Context.BoolTy; 6349 break; 6350 case 'z': // size_t. 6351 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'z'!"); 6352 Type = Context.getSizeType(); 6353 break; 6354 case 'F': 6355 Type = Context.getCFConstantStringType(); 6356 break; 6357 case 'G': 6358 Type = Context.getObjCIdType(); 6359 break; 6360 case 'H': 6361 Type = Context.getObjCSelType(); 6362 break; 6363 case 'a': 6364 Type = Context.getBuiltinVaListType(); 6365 assert(!Type.isNull() && "builtin va list type not initialized!"); 6366 break; 6367 case 'A': 6368 // This is a "reference" to a va_list; however, what exactly 6369 // this means depends on how va_list is defined. There are two 6370 // different kinds of va_list: ones passed by value, and ones 6371 // passed by reference. An example of a by-value va_list is 6372 // x86, where va_list is a char*. An example of by-ref va_list 6373 // is x86-64, where va_list is a __va_list_tag[1]. For x86, 6374 // we want this argument to be a char*&; for x86-64, we want 6375 // it to be a __va_list_tag*. 6376 Type = Context.getBuiltinVaListType(); 6377 assert(!Type.isNull() && "builtin va list type not initialized!"); 6378 if (Type->isArrayType()) 6379 Type = Context.getArrayDecayedType(Type); 6380 else 6381 Type = Context.getLValueReferenceType(Type); 6382 break; 6383 case 'V': { 6384 char *End; 6385 unsigned NumElements = strtoul(Str, &End, 10); 6386 assert(End != Str && "Missing vector size"); 6387 Str = End; 6388 6389 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, 6390 RequiresICE, false); 6391 assert(!RequiresICE && "Can't require vector ICE"); 6392 6393 // TODO: No way to make AltiVec vectors in builtins yet. 6394 Type = Context.getVectorType(ElementType, NumElements, 6395 VectorType::GenericVector); 6396 break; 6397 } 6398 case 'X': { 6399 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, RequiresICE, 6400 false); 6401 assert(!RequiresICE && "Can't require complex ICE"); 6402 Type = Context.getComplexType(ElementType); 6403 break; 6404 } 6405 case 'Y' : { 6406 Type = Context.getPointerDiffType(); 6407 break; 6408 } 6409 case 'P': 6410 Type = Context.getFILEType(); 6411 if (Type.isNull()) { 6412 Error = ASTContext::GE_Missing_stdio; 6413 return QualType(); 6414 } 6415 break; 6416 case 'J': 6417 if (Signed) 6418 Type = Context.getsigjmp_bufType(); 6419 else 6420 Type = Context.getjmp_bufType(); 6421 6422 if (Type.isNull()) { 6423 Error = ASTContext::GE_Missing_setjmp; 6424 return QualType(); 6425 } 6426 break; 6427 case 'K': 6428 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'K'!"); 6429 Type = Context.getucontext_tType(); 6430 6431 if (Type.isNull()) { 6432 Error = ASTContext::GE_Missing_ucontext; 6433 return QualType(); 6434 } 6435 break; 6436 } 6437 6438 // If there are modifiers and if we're allowed to parse them, go for it. 6439 Done = !AllowTypeModifiers; 6440 while (!Done) { 6441 switch (char c = *Str++) { 6442 default: Done = true; --Str; break; 6443 case '*': 6444 case '&': { 6445 // Both pointers and references can have their pointee types 6446 // qualified with an address space. 6447 char *End; 6448 unsigned AddrSpace = strtoul(Str, &End, 10); 6449 if (End != Str && AddrSpace != 0) { 6450 Type = Context.getAddrSpaceQualType(Type, AddrSpace); 6451 Str = End; 6452 } 6453 if (c == '*') 6454 Type = Context.getPointerType(Type); 6455 else 6456 Type = Context.getLValueReferenceType(Type); 6457 break; 6458 } 6459 // FIXME: There's no way to have a built-in with an rvalue ref arg. 6460 case 'C': 6461 Type = Type.withConst(); 6462 break; 6463 case 'D': 6464 Type = Context.getVolatileType(Type); 6465 break; 6466 case 'R': 6467 Type = Type.withRestrict(); 6468 break; 6469 } 6470 } 6471 6472 assert((!RequiresICE || Type->isIntegralOrEnumerationType()) && 6473 "Integer constant 'I' type must be an integer"); 6474 6475 return Type; 6476} 6477 6478/// GetBuiltinType - Return the type for the specified builtin. 6479QualType ASTContext::GetBuiltinType(unsigned Id, 6480 GetBuiltinTypeError &Error, 6481 unsigned *IntegerConstantArgs) const { 6482 const char *TypeStr = BuiltinInfo.GetTypeString(Id); 6483 6484 SmallVector<QualType, 8> ArgTypes; 6485 6486 bool RequiresICE = false; 6487 Error = GE_None; 6488 QualType ResType = DecodeTypeFromStr(TypeStr, *this, Error, 6489 RequiresICE, true); 6490 if (Error != GE_None) 6491 return QualType(); 6492 6493 assert(!RequiresICE && "Result of intrinsic cannot be required to be an ICE"); 6494 6495 while (TypeStr[0] && TypeStr[0] != '.') { 6496 QualType Ty = DecodeTypeFromStr(TypeStr, *this, Error, RequiresICE, true); 6497 if (Error != GE_None) 6498 return QualType(); 6499 6500 // If this argument is required to be an IntegerConstantExpression and the 6501 // caller cares, fill in the bitmask we return. 6502 if (RequiresICE && IntegerConstantArgs) 6503 *IntegerConstantArgs |= 1 << ArgTypes.size(); 6504 6505 // Do array -> pointer decay. The builtin should use the decayed type. 6506 if (Ty->isArrayType()) 6507 Ty = getArrayDecayedType(Ty); 6508 6509 ArgTypes.push_back(Ty); 6510 } 6511 6512 assert((TypeStr[0] != '.' || TypeStr[1] == 0) && 6513 "'.' should only occur at end of builtin type list!"); 6514 6515 FunctionType::ExtInfo EI; 6516 if (BuiltinInfo.isNoReturn(Id)) EI = EI.withNoReturn(true); 6517 6518 bool Variadic = (TypeStr[0] == '.'); 6519 6520 // We really shouldn't be making a no-proto type here, especially in C++. 6521 if (ArgTypes.empty() && Variadic) 6522 return getFunctionNoProtoType(ResType, EI); 6523 6524 FunctionProtoType::ExtProtoInfo EPI; 6525 EPI.ExtInfo = EI; 6526 EPI.Variadic = Variadic; 6527 6528 return getFunctionType(ResType, ArgTypes.data(), ArgTypes.size(), EPI); 6529} 6530 6531GVALinkage ASTContext::GetGVALinkageForFunction(const FunctionDecl *FD) { 6532 GVALinkage External = GVA_StrongExternal; 6533 6534 Linkage L = FD->getLinkage(); 6535 switch (L) { 6536 case NoLinkage: 6537 case InternalLinkage: 6538 case UniqueExternalLinkage: 6539 return GVA_Internal; 6540 6541 case ExternalLinkage: 6542 switch (FD->getTemplateSpecializationKind()) { 6543 case TSK_Undeclared: 6544 case TSK_ExplicitSpecialization: 6545 External = GVA_StrongExternal; 6546 break; 6547 6548 case TSK_ExplicitInstantiationDefinition: 6549 return GVA_ExplicitTemplateInstantiation; 6550 6551 case TSK_ExplicitInstantiationDeclaration: 6552 case TSK_ImplicitInstantiation: 6553 External = GVA_TemplateInstantiation; 6554 break; 6555 } 6556 } 6557 6558 if (!FD->isInlined()) 6559 return External; 6560 6561 if (!getLangOptions().CPlusPlus || FD->hasAttr<GNUInlineAttr>()) { 6562 // GNU or C99 inline semantics. Determine whether this symbol should be 6563 // externally visible. 6564 if (FD->isInlineDefinitionExternallyVisible()) 6565 return External; 6566 6567 // C99 inline semantics, where the symbol is not externally visible. 6568 return GVA_C99Inline; 6569 } 6570 6571 // C++0x [temp.explicit]p9: 6572 // [ Note: The intent is that an inline function that is the subject of 6573 // an explicit instantiation declaration will still be implicitly 6574 // instantiated when used so that the body can be considered for 6575 // inlining, but that no out-of-line copy of the inline function would be 6576 // generated in the translation unit. -- end note ] 6577 if (FD->getTemplateSpecializationKind() 6578 == TSK_ExplicitInstantiationDeclaration) 6579 return GVA_C99Inline; 6580 6581 return GVA_CXXInline; 6582} 6583 6584GVALinkage ASTContext::GetGVALinkageForVariable(const VarDecl *VD) { 6585 // If this is a static data member, compute the kind of template 6586 // specialization. Otherwise, this variable is not part of a 6587 // template. 6588 TemplateSpecializationKind TSK = TSK_Undeclared; 6589 if (VD->isStaticDataMember()) 6590 TSK = VD->getTemplateSpecializationKind(); 6591 6592 Linkage L = VD->getLinkage(); 6593 if (L == ExternalLinkage && getLangOptions().CPlusPlus && 6594 VD->getType()->getLinkage() == UniqueExternalLinkage) 6595 L = UniqueExternalLinkage; 6596 6597 switch (L) { 6598 case NoLinkage: 6599 case InternalLinkage: 6600 case UniqueExternalLinkage: 6601 return GVA_Internal; 6602 6603 case ExternalLinkage: 6604 switch (TSK) { 6605 case TSK_Undeclared: 6606 case TSK_ExplicitSpecialization: 6607 return GVA_StrongExternal; 6608 6609 case TSK_ExplicitInstantiationDeclaration: 6610 llvm_unreachable("Variable should not be instantiated"); 6611 // Fall through to treat this like any other instantiation. 6612 6613 case TSK_ExplicitInstantiationDefinition: 6614 return GVA_ExplicitTemplateInstantiation; 6615 6616 case TSK_ImplicitInstantiation: 6617 return GVA_TemplateInstantiation; 6618 } 6619 } 6620 6621 llvm_unreachable("Invalid Linkage!"); 6622} 6623 6624bool ASTContext::DeclMustBeEmitted(const Decl *D) { 6625 if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { 6626 if (!VD->isFileVarDecl()) 6627 return false; 6628 } else if (!isa<FunctionDecl>(D)) 6629 return false; 6630 6631 // Weak references don't produce any output by themselves. 6632 if (D->hasAttr<WeakRefAttr>()) 6633 return false; 6634 6635 // Aliases and used decls are required. 6636 if (D->hasAttr<AliasAttr>() || D->hasAttr<UsedAttr>()) 6637 return true; 6638 6639 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 6640 // Forward declarations aren't required. 6641 if (!FD->doesThisDeclarationHaveABody()) 6642 return FD->doesDeclarationForceExternallyVisibleDefinition(); 6643 6644 // Constructors and destructors are required. 6645 if (FD->hasAttr<ConstructorAttr>() || FD->hasAttr<DestructorAttr>()) 6646 return true; 6647 6648 // The key function for a class is required. 6649 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { 6650 const CXXRecordDecl *RD = MD->getParent(); 6651 if (MD->isOutOfLine() && RD->isDynamicClass()) { 6652 const CXXMethodDecl *KeyFunc = getKeyFunction(RD); 6653 if (KeyFunc && KeyFunc->getCanonicalDecl() == MD->getCanonicalDecl()) 6654 return true; 6655 } 6656 } 6657 6658 GVALinkage Linkage = GetGVALinkageForFunction(FD); 6659 6660 // static, static inline, always_inline, and extern inline functions can 6661 // always be deferred. Normal inline functions can be deferred in C99/C++. 6662 // Implicit template instantiations can also be deferred in C++. 6663 if (Linkage == GVA_Internal || Linkage == GVA_C99Inline || 6664 Linkage == GVA_CXXInline || Linkage == GVA_TemplateInstantiation) 6665 return false; 6666 return true; 6667 } 6668 6669 const VarDecl *VD = cast<VarDecl>(D); 6670 assert(VD->isFileVarDecl() && "Expected file scoped var"); 6671 6672 if (VD->isThisDeclarationADefinition() == VarDecl::DeclarationOnly) 6673 return false; 6674 6675 // Structs that have non-trivial constructors or destructors are required. 6676 6677 // FIXME: Handle references. 6678 // FIXME: Be more selective about which constructors we care about. 6679 if (const RecordType *RT = VD->getType()->getAs<RecordType>()) { 6680 if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(RT->getDecl())) { 6681 if (RD->hasDefinition() && !(RD->hasTrivialDefaultConstructor() && 6682 RD->hasTrivialCopyConstructor() && 6683 RD->hasTrivialMoveConstructor() && 6684 RD->hasTrivialDestructor())) 6685 return true; 6686 } 6687 } 6688 6689 GVALinkage L = GetGVALinkageForVariable(VD); 6690 if (L == GVA_Internal || L == GVA_TemplateInstantiation) { 6691 if (!(VD->getInit() && VD->getInit()->HasSideEffects(*this))) 6692 return false; 6693 } 6694 6695 return true; 6696} 6697 6698CallingConv ASTContext::getDefaultMethodCallConv() { 6699 // Pass through to the C++ ABI object 6700 return ABI->getDefaultMethodCallConv(); 6701} 6702 6703bool ASTContext::isNearlyEmpty(const CXXRecordDecl *RD) const { 6704 // Pass through to the C++ ABI object 6705 return ABI->isNearlyEmpty(RD); 6706} 6707 6708MangleContext *ASTContext::createMangleContext() { 6709 switch (Target->getCXXABI()) { 6710 case CXXABI_ARM: 6711 case CXXABI_Itanium: 6712 return createItaniumMangleContext(*this, getDiagnostics()); 6713 case CXXABI_Microsoft: 6714 return createMicrosoftMangleContext(*this, getDiagnostics()); 6715 } 6716 llvm_unreachable("Unsupported ABI"); 6717} 6718 6719CXXABI::~CXXABI() {} 6720 6721size_t ASTContext::getSideTableAllocatedMemory() const { 6722 return ASTRecordLayouts.getMemorySize() 6723 + llvm::capacity_in_bytes(ObjCLayouts) 6724 + llvm::capacity_in_bytes(KeyFunctions) 6725 + llvm::capacity_in_bytes(ObjCImpls) 6726 + llvm::capacity_in_bytes(BlockVarCopyInits) 6727 + llvm::capacity_in_bytes(DeclAttrs) 6728 + llvm::capacity_in_bytes(InstantiatedFromStaticDataMember) 6729 + llvm::capacity_in_bytes(InstantiatedFromUsingDecl) 6730 + llvm::capacity_in_bytes(InstantiatedFromUsingShadowDecl) 6731 + llvm::capacity_in_bytes(InstantiatedFromUnnamedFieldDecl) 6732 + llvm::capacity_in_bytes(OverriddenMethods) 6733 + llvm::capacity_in_bytes(Types) 6734 + llvm::capacity_in_bytes(VariableArrayTypes) 6735 + llvm::capacity_in_bytes(ClassScopeSpecializationPattern); 6736} 6737 6738unsigned ASTContext::getLambdaManglingNumber(CXXMethodDecl *CallOperator) { 6739 CXXRecordDecl *Lambda = CallOperator->getParent(); 6740 return LambdaMangleContexts[Lambda->getDeclContext()] 6741 .getManglingNumber(CallOperator); 6742} 6743 6744 6745void ASTContext::setParameterIndex(const ParmVarDecl *D, unsigned int index) { 6746 ParamIndices[D] = index; 6747} 6748 6749unsigned ASTContext::getParameterIndex(const ParmVarDecl *D) const { 6750 ParameterIndexTable::const_iterator I = ParamIndices.find(D); 6751 assert(I != ParamIndices.end() && 6752 "ParmIndices lacks entry set by ParmVarDecl"); 6753 return I->second; 6754} 6755