ASTContext.cpp revision 82d0b0aab9088e977c2a44c4a5a90479c63149fe
1//===--- ASTContext.cpp - Context to hold long-lived AST nodes ------------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file implements the ASTContext interface. 11// 12//===----------------------------------------------------------------------===// 13 14#include "clang/AST/ASTContext.h" 15#include "clang/AST/CharUnits.h" 16#include "clang/AST/DeclCXX.h" 17#include "clang/AST/DeclObjC.h" 18#include "clang/AST/DeclTemplate.h" 19#include "clang/AST/TypeLoc.h" 20#include "clang/AST/Expr.h" 21#include "clang/AST/ExprCXX.h" 22#include "clang/AST/ExternalASTSource.h" 23#include "clang/AST/ASTMutationListener.h" 24#include "clang/AST/RecordLayout.h" 25#include "clang/AST/Mangle.h" 26#include "clang/Basic/Builtins.h" 27#include "clang/Basic/SourceManager.h" 28#include "clang/Basic/TargetInfo.h" 29#include "llvm/ADT/SmallString.h" 30#include "llvm/ADT/StringExtras.h" 31#include "llvm/Support/MathExtras.h" 32#include "llvm/Support/raw_ostream.h" 33#include "llvm/Support/Capacity.h" 34#include "CXXABI.h" 35#include <map> 36 37using namespace clang; 38 39unsigned ASTContext::NumImplicitDefaultConstructors; 40unsigned ASTContext::NumImplicitDefaultConstructorsDeclared; 41unsigned ASTContext::NumImplicitCopyConstructors; 42unsigned ASTContext::NumImplicitCopyConstructorsDeclared; 43unsigned ASTContext::NumImplicitMoveConstructors; 44unsigned ASTContext::NumImplicitMoveConstructorsDeclared; 45unsigned ASTContext::NumImplicitCopyAssignmentOperators; 46unsigned ASTContext::NumImplicitCopyAssignmentOperatorsDeclared; 47unsigned ASTContext::NumImplicitMoveAssignmentOperators; 48unsigned ASTContext::NumImplicitMoveAssignmentOperatorsDeclared; 49unsigned ASTContext::NumImplicitDestructors; 50unsigned ASTContext::NumImplicitDestructorsDeclared; 51 52enum FloatingRank { 53 FloatRank, DoubleRank, LongDoubleRank 54}; 55 56void 57ASTContext::CanonicalTemplateTemplateParm::Profile(llvm::FoldingSetNodeID &ID, 58 TemplateTemplateParmDecl *Parm) { 59 ID.AddInteger(Parm->getDepth()); 60 ID.AddInteger(Parm->getPosition()); 61 ID.AddBoolean(Parm->isParameterPack()); 62 63 TemplateParameterList *Params = Parm->getTemplateParameters(); 64 ID.AddInteger(Params->size()); 65 for (TemplateParameterList::const_iterator P = Params->begin(), 66 PEnd = Params->end(); 67 P != PEnd; ++P) { 68 if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*P)) { 69 ID.AddInteger(0); 70 ID.AddBoolean(TTP->isParameterPack()); 71 continue; 72 } 73 74 if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(*P)) { 75 ID.AddInteger(1); 76 ID.AddBoolean(NTTP->isParameterPack()); 77 ID.AddPointer(NTTP->getType().getAsOpaquePtr()); 78 if (NTTP->isExpandedParameterPack()) { 79 ID.AddBoolean(true); 80 ID.AddInteger(NTTP->getNumExpansionTypes()); 81 for (unsigned I = 0, N = NTTP->getNumExpansionTypes(); I != N; ++I) 82 ID.AddPointer(NTTP->getExpansionType(I).getAsOpaquePtr()); 83 } else 84 ID.AddBoolean(false); 85 continue; 86 } 87 88 TemplateTemplateParmDecl *TTP = cast<TemplateTemplateParmDecl>(*P); 89 ID.AddInteger(2); 90 Profile(ID, TTP); 91 } 92} 93 94TemplateTemplateParmDecl * 95ASTContext::getCanonicalTemplateTemplateParmDecl( 96 TemplateTemplateParmDecl *TTP) const { 97 // Check if we already have a canonical template template parameter. 98 llvm::FoldingSetNodeID ID; 99 CanonicalTemplateTemplateParm::Profile(ID, TTP); 100 void *InsertPos = 0; 101 CanonicalTemplateTemplateParm *Canonical 102 = CanonTemplateTemplateParms.FindNodeOrInsertPos(ID, InsertPos); 103 if (Canonical) 104 return Canonical->getParam(); 105 106 // Build a canonical template parameter list. 107 TemplateParameterList *Params = TTP->getTemplateParameters(); 108 SmallVector<NamedDecl *, 4> CanonParams; 109 CanonParams.reserve(Params->size()); 110 for (TemplateParameterList::const_iterator P = Params->begin(), 111 PEnd = Params->end(); 112 P != PEnd; ++P) { 113 if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*P)) 114 CanonParams.push_back( 115 TemplateTypeParmDecl::Create(*this, getTranslationUnitDecl(), 116 SourceLocation(), 117 SourceLocation(), 118 TTP->getDepth(), 119 TTP->getIndex(), 0, false, 120 TTP->isParameterPack())); 121 else if (NonTypeTemplateParmDecl *NTTP 122 = dyn_cast<NonTypeTemplateParmDecl>(*P)) { 123 QualType T = getCanonicalType(NTTP->getType()); 124 TypeSourceInfo *TInfo = getTrivialTypeSourceInfo(T); 125 NonTypeTemplateParmDecl *Param; 126 if (NTTP->isExpandedParameterPack()) { 127 SmallVector<QualType, 2> ExpandedTypes; 128 SmallVector<TypeSourceInfo *, 2> ExpandedTInfos; 129 for (unsigned I = 0, N = NTTP->getNumExpansionTypes(); I != N; ++I) { 130 ExpandedTypes.push_back(getCanonicalType(NTTP->getExpansionType(I))); 131 ExpandedTInfos.push_back( 132 getTrivialTypeSourceInfo(ExpandedTypes.back())); 133 } 134 135 Param = NonTypeTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 136 SourceLocation(), 137 SourceLocation(), 138 NTTP->getDepth(), 139 NTTP->getPosition(), 0, 140 T, 141 TInfo, 142 ExpandedTypes.data(), 143 ExpandedTypes.size(), 144 ExpandedTInfos.data()); 145 } else { 146 Param = NonTypeTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 147 SourceLocation(), 148 SourceLocation(), 149 NTTP->getDepth(), 150 NTTP->getPosition(), 0, 151 T, 152 NTTP->isParameterPack(), 153 TInfo); 154 } 155 CanonParams.push_back(Param); 156 157 } else 158 CanonParams.push_back(getCanonicalTemplateTemplateParmDecl( 159 cast<TemplateTemplateParmDecl>(*P))); 160 } 161 162 TemplateTemplateParmDecl *CanonTTP 163 = TemplateTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 164 SourceLocation(), TTP->getDepth(), 165 TTP->getPosition(), 166 TTP->isParameterPack(), 167 0, 168 TemplateParameterList::Create(*this, SourceLocation(), 169 SourceLocation(), 170 CanonParams.data(), 171 CanonParams.size(), 172 SourceLocation())); 173 174 // Get the new insert position for the node we care about. 175 Canonical = CanonTemplateTemplateParms.FindNodeOrInsertPos(ID, InsertPos); 176 assert(Canonical == 0 && "Shouldn't be in the map!"); 177 (void)Canonical; 178 179 // Create the canonical template template parameter entry. 180 Canonical = new (*this) CanonicalTemplateTemplateParm(CanonTTP); 181 CanonTemplateTemplateParms.InsertNode(Canonical, InsertPos); 182 return CanonTTP; 183} 184 185CXXABI *ASTContext::createCXXABI(const TargetInfo &T) { 186 if (!LangOpts.CPlusPlus) return 0; 187 188 switch (T.getCXXABI()) { 189 case CXXABI_ARM: 190 return CreateARMCXXABI(*this); 191 case CXXABI_Itanium: 192 return CreateItaniumCXXABI(*this); 193 case CXXABI_Microsoft: 194 return CreateMicrosoftCXXABI(*this); 195 } 196 return 0; 197} 198 199static const LangAS::Map *getAddressSpaceMap(const TargetInfo &T, 200 const LangOptions &LOpts) { 201 if (LOpts.FakeAddressSpaceMap) { 202 // The fake address space map must have a distinct entry for each 203 // language-specific address space. 204 static const unsigned FakeAddrSpaceMap[] = { 205 1, // opencl_global 206 2, // opencl_local 207 3 // opencl_constant 208 }; 209 return &FakeAddrSpaceMap; 210 } else { 211 return &T.getAddressSpaceMap(); 212 } 213} 214 215ASTContext::ASTContext(LangOptions& LOpts, SourceManager &SM, 216 const TargetInfo *t, 217 IdentifierTable &idents, SelectorTable &sels, 218 Builtin::Context &builtins, 219 unsigned size_reserve, 220 bool DelayInitialization) 221 : FunctionProtoTypes(this_()), 222 TemplateSpecializationTypes(this_()), 223 DependentTemplateSpecializationTypes(this_()), 224 SubstTemplateTemplateParmPacks(this_()), 225 GlobalNestedNameSpecifier(0), 226 Int128Decl(0), UInt128Decl(0), 227 ObjCIdDecl(0), ObjCSelDecl(0), ObjCClassDecl(0), 228 CFConstantStringTypeDecl(0), ObjCInstanceTypeDecl(0), 229 FILEDecl(0), 230 jmp_bufDecl(0), sigjmp_bufDecl(0), BlockDescriptorType(0), 231 BlockDescriptorExtendedType(0), cudaConfigureCallDecl(0), 232 NullTypeSourceInfo(QualType()), 233 SourceMgr(SM), LangOpts(LOpts), 234 AddrSpaceMap(0), Target(t), PrintingPolicy(LOpts), 235 Idents(idents), Selectors(sels), 236 BuiltinInfo(builtins), 237 DeclarationNames(*this), 238 ExternalSource(0), Listener(0), 239 LastSDM(0, 0), 240 UniqueBlockByRefTypeID(0) 241{ 242 if (size_reserve > 0) Types.reserve(size_reserve); 243 TUDecl = TranslationUnitDecl::Create(*this); 244 245 if (!DelayInitialization) { 246 assert(t && "No target supplied for ASTContext initialization"); 247 InitBuiltinTypes(*t); 248 } 249} 250 251ASTContext::~ASTContext() { 252 // Release the DenseMaps associated with DeclContext objects. 253 // FIXME: Is this the ideal solution? 254 ReleaseDeclContextMaps(); 255 256 // Call all of the deallocation functions. 257 for (unsigned I = 0, N = Deallocations.size(); I != N; ++I) 258 Deallocations[I].first(Deallocations[I].second); 259 260 // Release all of the memory associated with overridden C++ methods. 261 for (llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::iterator 262 OM = OverriddenMethods.begin(), OMEnd = OverriddenMethods.end(); 263 OM != OMEnd; ++OM) 264 OM->second.Destroy(); 265 266 // ASTRecordLayout objects in ASTRecordLayouts must always be destroyed 267 // because they can contain DenseMaps. 268 for (llvm::DenseMap<const ObjCContainerDecl*, 269 const ASTRecordLayout*>::iterator 270 I = ObjCLayouts.begin(), E = ObjCLayouts.end(); I != E; ) 271 // Increment in loop to prevent using deallocated memory. 272 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 273 R->Destroy(*this); 274 275 for (llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*>::iterator 276 I = ASTRecordLayouts.begin(), E = ASTRecordLayouts.end(); I != E; ) { 277 // Increment in loop to prevent using deallocated memory. 278 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 279 R->Destroy(*this); 280 } 281 282 for (llvm::DenseMap<const Decl*, AttrVec*>::iterator A = DeclAttrs.begin(), 283 AEnd = DeclAttrs.end(); 284 A != AEnd; ++A) 285 A->second->~AttrVec(); 286} 287 288void ASTContext::AddDeallocation(void (*Callback)(void*), void *Data) { 289 Deallocations.push_back(std::make_pair(Callback, Data)); 290} 291 292void 293ASTContext::setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source) { 294 ExternalSource.reset(Source.take()); 295} 296 297void ASTContext::PrintStats() const { 298 llvm::errs() << "\n*** AST Context Stats:\n"; 299 llvm::errs() << " " << Types.size() << " types total.\n"; 300 301 unsigned counts[] = { 302#define TYPE(Name, Parent) 0, 303#define ABSTRACT_TYPE(Name, Parent) 304#include "clang/AST/TypeNodes.def" 305 0 // Extra 306 }; 307 308 for (unsigned i = 0, e = Types.size(); i != e; ++i) { 309 Type *T = Types[i]; 310 counts[(unsigned)T->getTypeClass()]++; 311 } 312 313 unsigned Idx = 0; 314 unsigned TotalBytes = 0; 315#define TYPE(Name, Parent) \ 316 if (counts[Idx]) \ 317 llvm::errs() << " " << counts[Idx] << " " << #Name \ 318 << " types\n"; \ 319 TotalBytes += counts[Idx] * sizeof(Name##Type); \ 320 ++Idx; 321#define ABSTRACT_TYPE(Name, Parent) 322#include "clang/AST/TypeNodes.def" 323 324 llvm::errs() << "Total bytes = " << TotalBytes << "\n"; 325 326 // Implicit special member functions. 327 llvm::errs() << NumImplicitDefaultConstructorsDeclared << "/" 328 << NumImplicitDefaultConstructors 329 << " implicit default constructors created\n"; 330 llvm::errs() << NumImplicitCopyConstructorsDeclared << "/" 331 << NumImplicitCopyConstructors 332 << " implicit copy constructors created\n"; 333 if (getLangOptions().CPlusPlus) 334 llvm::errs() << NumImplicitMoveConstructorsDeclared << "/" 335 << NumImplicitMoveConstructors 336 << " implicit move constructors created\n"; 337 llvm::errs() << NumImplicitCopyAssignmentOperatorsDeclared << "/" 338 << NumImplicitCopyAssignmentOperators 339 << " implicit copy assignment operators created\n"; 340 if (getLangOptions().CPlusPlus) 341 llvm::errs() << NumImplicitMoveAssignmentOperatorsDeclared << "/" 342 << NumImplicitMoveAssignmentOperators 343 << " implicit move assignment operators created\n"; 344 llvm::errs() << NumImplicitDestructorsDeclared << "/" 345 << NumImplicitDestructors 346 << " implicit destructors created\n"; 347 348 if (ExternalSource.get()) { 349 llvm::errs() << "\n"; 350 ExternalSource->PrintStats(); 351 } 352 353 BumpAlloc.PrintStats(); 354} 355 356TypedefDecl *ASTContext::getInt128Decl() const { 357 if (!Int128Decl) { 358 TypeSourceInfo *TInfo = getTrivialTypeSourceInfo(Int128Ty); 359 Int128Decl = TypedefDecl::Create(const_cast<ASTContext &>(*this), 360 getTranslationUnitDecl(), 361 SourceLocation(), 362 SourceLocation(), 363 &Idents.get("__int128_t"), 364 TInfo); 365 } 366 367 return Int128Decl; 368} 369 370TypedefDecl *ASTContext::getUInt128Decl() const { 371 if (!UInt128Decl) { 372 TypeSourceInfo *TInfo = getTrivialTypeSourceInfo(UnsignedInt128Ty); 373 UInt128Decl = TypedefDecl::Create(const_cast<ASTContext &>(*this), 374 getTranslationUnitDecl(), 375 SourceLocation(), 376 SourceLocation(), 377 &Idents.get("__uint128_t"), 378 TInfo); 379 } 380 381 return UInt128Decl; 382} 383 384void ASTContext::InitBuiltinType(CanQualType &R, BuiltinType::Kind K) { 385 BuiltinType *Ty = new (*this, TypeAlignment) BuiltinType(K); 386 R = CanQualType::CreateUnsafe(QualType(Ty, 0)); 387 Types.push_back(Ty); 388} 389 390void ASTContext::InitBuiltinTypes(const TargetInfo &Target) { 391 assert((!this->Target || this->Target == &Target) && 392 "Incorrect target reinitialization"); 393 assert(VoidTy.isNull() && "Context reinitialized?"); 394 395 this->Target = &Target; 396 397 ABI.reset(createCXXABI(Target)); 398 AddrSpaceMap = getAddressSpaceMap(Target, LangOpts); 399 400 // C99 6.2.5p19. 401 InitBuiltinType(VoidTy, BuiltinType::Void); 402 403 // C99 6.2.5p2. 404 InitBuiltinType(BoolTy, BuiltinType::Bool); 405 // C99 6.2.5p3. 406 if (LangOpts.CharIsSigned) 407 InitBuiltinType(CharTy, BuiltinType::Char_S); 408 else 409 InitBuiltinType(CharTy, BuiltinType::Char_U); 410 // C99 6.2.5p4. 411 InitBuiltinType(SignedCharTy, BuiltinType::SChar); 412 InitBuiltinType(ShortTy, BuiltinType::Short); 413 InitBuiltinType(IntTy, BuiltinType::Int); 414 InitBuiltinType(LongTy, BuiltinType::Long); 415 InitBuiltinType(LongLongTy, BuiltinType::LongLong); 416 417 // C99 6.2.5p6. 418 InitBuiltinType(UnsignedCharTy, BuiltinType::UChar); 419 InitBuiltinType(UnsignedShortTy, BuiltinType::UShort); 420 InitBuiltinType(UnsignedIntTy, BuiltinType::UInt); 421 InitBuiltinType(UnsignedLongTy, BuiltinType::ULong); 422 InitBuiltinType(UnsignedLongLongTy, BuiltinType::ULongLong); 423 424 // C99 6.2.5p10. 425 InitBuiltinType(FloatTy, BuiltinType::Float); 426 InitBuiltinType(DoubleTy, BuiltinType::Double); 427 InitBuiltinType(LongDoubleTy, BuiltinType::LongDouble); 428 429 // GNU extension, 128-bit integers. 430 InitBuiltinType(Int128Ty, BuiltinType::Int128); 431 InitBuiltinType(UnsignedInt128Ty, BuiltinType::UInt128); 432 433 if (LangOpts.CPlusPlus) { // C++ 3.9.1p5 434 if (TargetInfo::isTypeSigned(Target.getWCharType())) 435 InitBuiltinType(WCharTy, BuiltinType::WChar_S); 436 else // -fshort-wchar makes wchar_t be unsigned. 437 InitBuiltinType(WCharTy, BuiltinType::WChar_U); 438 } else // C99 439 WCharTy = getFromTargetType(Target.getWCharType()); 440 441 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 442 InitBuiltinType(Char16Ty, BuiltinType::Char16); 443 else // C99 444 Char16Ty = getFromTargetType(Target.getChar16Type()); 445 446 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 447 InitBuiltinType(Char32Ty, BuiltinType::Char32); 448 else // C99 449 Char32Ty = getFromTargetType(Target.getChar32Type()); 450 451 // Placeholder type for type-dependent expressions whose type is 452 // completely unknown. No code should ever check a type against 453 // DependentTy and users should never see it; however, it is here to 454 // help diagnose failures to properly check for type-dependent 455 // expressions. 456 InitBuiltinType(DependentTy, BuiltinType::Dependent); 457 458 // Placeholder type for functions. 459 InitBuiltinType(OverloadTy, BuiltinType::Overload); 460 461 // Placeholder type for bound members. 462 InitBuiltinType(BoundMemberTy, BuiltinType::BoundMember); 463 464 // "any" type; useful for debugger-like clients. 465 InitBuiltinType(UnknownAnyTy, BuiltinType::UnknownAny); 466 467 // C99 6.2.5p11. 468 FloatComplexTy = getComplexType(FloatTy); 469 DoubleComplexTy = getComplexType(DoubleTy); 470 LongDoubleComplexTy = getComplexType(LongDoubleTy); 471 472 BuiltinVaListType = QualType(); 473 474 // Builtin types for 'id', 'Class', and 'SEL'. 475 InitBuiltinType(ObjCBuiltinIdTy, BuiltinType::ObjCId); 476 InitBuiltinType(ObjCBuiltinClassTy, BuiltinType::ObjCClass); 477 InitBuiltinType(ObjCBuiltinSelTy, BuiltinType::ObjCSel); 478 479 ObjCConstantStringType = QualType(); 480 481 // void * type 482 VoidPtrTy = getPointerType(VoidTy); 483 484 // nullptr type (C++0x 2.14.7) 485 InitBuiltinType(NullPtrTy, BuiltinType::NullPtr); 486} 487 488DiagnosticsEngine &ASTContext::getDiagnostics() const { 489 return SourceMgr.getDiagnostics(); 490} 491 492AttrVec& ASTContext::getDeclAttrs(const Decl *D) { 493 AttrVec *&Result = DeclAttrs[D]; 494 if (!Result) { 495 void *Mem = Allocate(sizeof(AttrVec)); 496 Result = new (Mem) AttrVec; 497 } 498 499 return *Result; 500} 501 502/// \brief Erase the attributes corresponding to the given declaration. 503void ASTContext::eraseDeclAttrs(const Decl *D) { 504 llvm::DenseMap<const Decl*, AttrVec*>::iterator Pos = DeclAttrs.find(D); 505 if (Pos != DeclAttrs.end()) { 506 Pos->second->~AttrVec(); 507 DeclAttrs.erase(Pos); 508 } 509} 510 511MemberSpecializationInfo * 512ASTContext::getInstantiatedFromStaticDataMember(const VarDecl *Var) { 513 assert(Var->isStaticDataMember() && "Not a static data member"); 514 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *>::iterator Pos 515 = InstantiatedFromStaticDataMember.find(Var); 516 if (Pos == InstantiatedFromStaticDataMember.end()) 517 return 0; 518 519 return Pos->second; 520} 521 522void 523ASTContext::setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 524 TemplateSpecializationKind TSK, 525 SourceLocation PointOfInstantiation) { 526 assert(Inst->isStaticDataMember() && "Not a static data member"); 527 assert(Tmpl->isStaticDataMember() && "Not a static data member"); 528 assert(!InstantiatedFromStaticDataMember[Inst] && 529 "Already noted what static data member was instantiated from"); 530 InstantiatedFromStaticDataMember[Inst] 531 = new (*this) MemberSpecializationInfo(Tmpl, TSK, PointOfInstantiation); 532} 533 534FunctionDecl *ASTContext::getClassScopeSpecializationPattern( 535 const FunctionDecl *FD){ 536 assert(FD && "Specialization is 0"); 537 llvm::DenseMap<const FunctionDecl*, FunctionDecl *>::const_iterator Pos 538 = ClassScopeSpecializationPattern.find(FD); 539 if (Pos == ClassScopeSpecializationPattern.end()) 540 return 0; 541 542 return Pos->second; 543} 544 545void ASTContext::setClassScopeSpecializationPattern(FunctionDecl *FD, 546 FunctionDecl *Pattern) { 547 assert(FD && "Specialization is 0"); 548 assert(Pattern && "Class scope specialization pattern is 0"); 549 ClassScopeSpecializationPattern[FD] = Pattern; 550} 551 552NamedDecl * 553ASTContext::getInstantiatedFromUsingDecl(UsingDecl *UUD) { 554 llvm::DenseMap<UsingDecl *, NamedDecl *>::const_iterator Pos 555 = InstantiatedFromUsingDecl.find(UUD); 556 if (Pos == InstantiatedFromUsingDecl.end()) 557 return 0; 558 559 return Pos->second; 560} 561 562void 563ASTContext::setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern) { 564 assert((isa<UsingDecl>(Pattern) || 565 isa<UnresolvedUsingValueDecl>(Pattern) || 566 isa<UnresolvedUsingTypenameDecl>(Pattern)) && 567 "pattern decl is not a using decl"); 568 assert(!InstantiatedFromUsingDecl[Inst] && "pattern already exists"); 569 InstantiatedFromUsingDecl[Inst] = Pattern; 570} 571 572UsingShadowDecl * 573ASTContext::getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst) { 574 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*>::const_iterator Pos 575 = InstantiatedFromUsingShadowDecl.find(Inst); 576 if (Pos == InstantiatedFromUsingShadowDecl.end()) 577 return 0; 578 579 return Pos->second; 580} 581 582void 583ASTContext::setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 584 UsingShadowDecl *Pattern) { 585 assert(!InstantiatedFromUsingShadowDecl[Inst] && "pattern already exists"); 586 InstantiatedFromUsingShadowDecl[Inst] = Pattern; 587} 588 589FieldDecl *ASTContext::getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field) { 590 llvm::DenseMap<FieldDecl *, FieldDecl *>::iterator Pos 591 = InstantiatedFromUnnamedFieldDecl.find(Field); 592 if (Pos == InstantiatedFromUnnamedFieldDecl.end()) 593 return 0; 594 595 return Pos->second; 596} 597 598void ASTContext::setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, 599 FieldDecl *Tmpl) { 600 assert(!Inst->getDeclName() && "Instantiated field decl is not unnamed"); 601 assert(!Tmpl->getDeclName() && "Template field decl is not unnamed"); 602 assert(!InstantiatedFromUnnamedFieldDecl[Inst] && 603 "Already noted what unnamed field was instantiated from"); 604 605 InstantiatedFromUnnamedFieldDecl[Inst] = Tmpl; 606} 607 608bool ASTContext::ZeroBitfieldFollowsNonBitfield(const FieldDecl *FD, 609 const FieldDecl *LastFD) const { 610 return (FD->isBitField() && LastFD && !LastFD->isBitField() && 611 FD->getBitWidth()->EvaluateAsInt(*this).getZExtValue() == 0); 612} 613 614bool ASTContext::ZeroBitfieldFollowsBitfield(const FieldDecl *FD, 615 const FieldDecl *LastFD) const { 616 return (FD->isBitField() && LastFD && LastFD->isBitField() && 617 FD->getBitWidth()->EvaluateAsInt(*this).getZExtValue() == 0 && 618 LastFD->getBitWidth()->EvaluateAsInt(*this).getZExtValue() != 0); 619} 620 621bool ASTContext::BitfieldFollowsBitfield(const FieldDecl *FD, 622 const FieldDecl *LastFD) const { 623 return (FD->isBitField() && LastFD && LastFD->isBitField() && 624 FD->getBitWidth()->EvaluateAsInt(*this).getZExtValue() && 625 LastFD->getBitWidth()->EvaluateAsInt(*this).getZExtValue()); 626} 627 628bool ASTContext::NonBitfieldFollowsBitfield(const FieldDecl *FD, 629 const FieldDecl *LastFD) const { 630 return (!FD->isBitField() && LastFD && LastFD->isBitField() && 631 LastFD->getBitWidth()->EvaluateAsInt(*this).getZExtValue()); 632} 633 634bool ASTContext::BitfieldFollowsNonBitfield(const FieldDecl *FD, 635 const FieldDecl *LastFD) const { 636 return (FD->isBitField() && LastFD && !LastFD->isBitField() && 637 FD->getBitWidth()->EvaluateAsInt(*this).getZExtValue()); 638} 639 640ASTContext::overridden_cxx_method_iterator 641ASTContext::overridden_methods_begin(const CXXMethodDecl *Method) const { 642 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 643 = OverriddenMethods.find(Method); 644 if (Pos == OverriddenMethods.end()) 645 return 0; 646 647 return Pos->second.begin(); 648} 649 650ASTContext::overridden_cxx_method_iterator 651ASTContext::overridden_methods_end(const CXXMethodDecl *Method) const { 652 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 653 = OverriddenMethods.find(Method); 654 if (Pos == OverriddenMethods.end()) 655 return 0; 656 657 return Pos->second.end(); 658} 659 660unsigned 661ASTContext::overridden_methods_size(const CXXMethodDecl *Method) const { 662 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 663 = OverriddenMethods.find(Method); 664 if (Pos == OverriddenMethods.end()) 665 return 0; 666 667 return Pos->second.size(); 668} 669 670void ASTContext::addOverriddenMethod(const CXXMethodDecl *Method, 671 const CXXMethodDecl *Overridden) { 672 OverriddenMethods[Method].push_back(Overridden); 673} 674 675//===----------------------------------------------------------------------===// 676// Type Sizing and Analysis 677//===----------------------------------------------------------------------===// 678 679/// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 680/// scalar floating point type. 681const llvm::fltSemantics &ASTContext::getFloatTypeSemantics(QualType T) const { 682 const BuiltinType *BT = T->getAs<BuiltinType>(); 683 assert(BT && "Not a floating point type!"); 684 switch (BT->getKind()) { 685 default: llvm_unreachable("Not a floating point type!"); 686 case BuiltinType::Float: return Target->getFloatFormat(); 687 case BuiltinType::Double: return Target->getDoubleFormat(); 688 case BuiltinType::LongDouble: return Target->getLongDoubleFormat(); 689 } 690} 691 692/// getDeclAlign - Return a conservative estimate of the alignment of the 693/// specified decl. Note that bitfields do not have a valid alignment, so 694/// this method will assert on them. 695/// If @p RefAsPointee, references are treated like their underlying type 696/// (for alignof), else they're treated like pointers (for CodeGen). 697CharUnits ASTContext::getDeclAlign(const Decl *D, bool RefAsPointee) const { 698 unsigned Align = Target->getCharWidth(); 699 700 bool UseAlignAttrOnly = false; 701 if (unsigned AlignFromAttr = D->getMaxAlignment()) { 702 Align = AlignFromAttr; 703 704 // __attribute__((aligned)) can increase or decrease alignment 705 // *except* on a struct or struct member, where it only increases 706 // alignment unless 'packed' is also specified. 707 // 708 // It is an error for alignas to decrease alignment, so we can 709 // ignore that possibility; Sema should diagnose it. 710 if (isa<FieldDecl>(D)) { 711 UseAlignAttrOnly = D->hasAttr<PackedAttr>() || 712 cast<FieldDecl>(D)->getParent()->hasAttr<PackedAttr>(); 713 } else { 714 UseAlignAttrOnly = true; 715 } 716 } 717 else if (isa<FieldDecl>(D)) 718 UseAlignAttrOnly = 719 D->hasAttr<PackedAttr>() || 720 cast<FieldDecl>(D)->getParent()->hasAttr<PackedAttr>(); 721 722 // If we're using the align attribute only, just ignore everything 723 // else about the declaration and its type. 724 if (UseAlignAttrOnly) { 725 // do nothing 726 727 } else if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) { 728 QualType T = VD->getType(); 729 if (const ReferenceType* RT = T->getAs<ReferenceType>()) { 730 if (RefAsPointee) 731 T = RT->getPointeeType(); 732 else 733 T = getPointerType(RT->getPointeeType()); 734 } 735 if (!T->isIncompleteType() && !T->isFunctionType()) { 736 // Adjust alignments of declarations with array type by the 737 // large-array alignment on the target. 738 unsigned MinWidth = Target->getLargeArrayMinWidth(); 739 const ArrayType *arrayType; 740 if (MinWidth && (arrayType = getAsArrayType(T))) { 741 if (isa<VariableArrayType>(arrayType)) 742 Align = std::max(Align, Target->getLargeArrayAlign()); 743 else if (isa<ConstantArrayType>(arrayType) && 744 MinWidth <= getTypeSize(cast<ConstantArrayType>(arrayType))) 745 Align = std::max(Align, Target->getLargeArrayAlign()); 746 747 // Walk through any array types while we're at it. 748 T = getBaseElementType(arrayType); 749 } 750 Align = std::max(Align, getPreferredTypeAlign(T.getTypePtr())); 751 } 752 753 // Fields can be subject to extra alignment constraints, like if 754 // the field is packed, the struct is packed, or the struct has a 755 // a max-field-alignment constraint (#pragma pack). So calculate 756 // the actual alignment of the field within the struct, and then 757 // (as we're expected to) constrain that by the alignment of the type. 758 if (const FieldDecl *field = dyn_cast<FieldDecl>(VD)) { 759 // So calculate the alignment of the field. 760 const ASTRecordLayout &layout = getASTRecordLayout(field->getParent()); 761 762 // Start with the record's overall alignment. 763 unsigned fieldAlign = toBits(layout.getAlignment()); 764 765 // Use the GCD of that and the offset within the record. 766 uint64_t offset = layout.getFieldOffset(field->getFieldIndex()); 767 if (offset > 0) { 768 // Alignment is always a power of 2, so the GCD will be a power of 2, 769 // which means we get to do this crazy thing instead of Euclid's. 770 uint64_t lowBitOfOffset = offset & (~offset + 1); 771 if (lowBitOfOffset < fieldAlign) 772 fieldAlign = static_cast<unsigned>(lowBitOfOffset); 773 } 774 775 Align = std::min(Align, fieldAlign); 776 } 777 } 778 779 return toCharUnitsFromBits(Align); 780} 781 782std::pair<CharUnits, CharUnits> 783ASTContext::getTypeInfoInChars(const Type *T) const { 784 std::pair<uint64_t, unsigned> Info = getTypeInfo(T); 785 return std::make_pair(toCharUnitsFromBits(Info.first), 786 toCharUnitsFromBits(Info.second)); 787} 788 789std::pair<CharUnits, CharUnits> 790ASTContext::getTypeInfoInChars(QualType T) const { 791 return getTypeInfoInChars(T.getTypePtr()); 792} 793 794/// getTypeSize - Return the size of the specified type, in bits. This method 795/// does not work on incomplete types. 796/// 797/// FIXME: Pointers into different addr spaces could have different sizes and 798/// alignment requirements: getPointerInfo should take an AddrSpace, this 799/// should take a QualType, &c. 800std::pair<uint64_t, unsigned> 801ASTContext::getTypeInfo(const Type *T) const { 802 uint64_t Width=0; 803 unsigned Align=8; 804 switch (T->getTypeClass()) { 805#define TYPE(Class, Base) 806#define ABSTRACT_TYPE(Class, Base) 807#define NON_CANONICAL_TYPE(Class, Base) 808#define DEPENDENT_TYPE(Class, Base) case Type::Class: 809#include "clang/AST/TypeNodes.def" 810 llvm_unreachable("Should not see dependent types"); 811 break; 812 813 case Type::FunctionNoProto: 814 case Type::FunctionProto: 815 // GCC extension: alignof(function) = 32 bits 816 Width = 0; 817 Align = 32; 818 break; 819 820 case Type::IncompleteArray: 821 case Type::VariableArray: 822 Width = 0; 823 Align = getTypeAlign(cast<ArrayType>(T)->getElementType()); 824 break; 825 826 case Type::ConstantArray: { 827 const ConstantArrayType *CAT = cast<ConstantArrayType>(T); 828 829 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(CAT->getElementType()); 830 Width = EltInfo.first*CAT->getSize().getZExtValue(); 831 Align = EltInfo.second; 832 Width = llvm::RoundUpToAlignment(Width, Align); 833 break; 834 } 835 case Type::ExtVector: 836 case Type::Vector: { 837 const VectorType *VT = cast<VectorType>(T); 838 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(VT->getElementType()); 839 Width = EltInfo.first*VT->getNumElements(); 840 Align = Width; 841 // If the alignment is not a power of 2, round up to the next power of 2. 842 // This happens for non-power-of-2 length vectors. 843 if (Align & (Align-1)) { 844 Align = llvm::NextPowerOf2(Align); 845 Width = llvm::RoundUpToAlignment(Width, Align); 846 } 847 break; 848 } 849 850 case Type::Builtin: 851 switch (cast<BuiltinType>(T)->getKind()) { 852 default: llvm_unreachable("Unknown builtin type!"); 853 case BuiltinType::Void: 854 // GCC extension: alignof(void) = 8 bits. 855 Width = 0; 856 Align = 8; 857 break; 858 859 case BuiltinType::Bool: 860 Width = Target->getBoolWidth(); 861 Align = Target->getBoolAlign(); 862 break; 863 case BuiltinType::Char_S: 864 case BuiltinType::Char_U: 865 case BuiltinType::UChar: 866 case BuiltinType::SChar: 867 Width = Target->getCharWidth(); 868 Align = Target->getCharAlign(); 869 break; 870 case BuiltinType::WChar_S: 871 case BuiltinType::WChar_U: 872 Width = Target->getWCharWidth(); 873 Align = Target->getWCharAlign(); 874 break; 875 case BuiltinType::Char16: 876 Width = Target->getChar16Width(); 877 Align = Target->getChar16Align(); 878 break; 879 case BuiltinType::Char32: 880 Width = Target->getChar32Width(); 881 Align = Target->getChar32Align(); 882 break; 883 case BuiltinType::UShort: 884 case BuiltinType::Short: 885 Width = Target->getShortWidth(); 886 Align = Target->getShortAlign(); 887 break; 888 case BuiltinType::UInt: 889 case BuiltinType::Int: 890 Width = Target->getIntWidth(); 891 Align = Target->getIntAlign(); 892 break; 893 case BuiltinType::ULong: 894 case BuiltinType::Long: 895 Width = Target->getLongWidth(); 896 Align = Target->getLongAlign(); 897 break; 898 case BuiltinType::ULongLong: 899 case BuiltinType::LongLong: 900 Width = Target->getLongLongWidth(); 901 Align = Target->getLongLongAlign(); 902 break; 903 case BuiltinType::Int128: 904 case BuiltinType::UInt128: 905 Width = 128; 906 Align = 128; // int128_t is 128-bit aligned on all targets. 907 break; 908 case BuiltinType::Float: 909 Width = Target->getFloatWidth(); 910 Align = Target->getFloatAlign(); 911 break; 912 case BuiltinType::Double: 913 Width = Target->getDoubleWidth(); 914 Align = Target->getDoubleAlign(); 915 break; 916 case BuiltinType::LongDouble: 917 Width = Target->getLongDoubleWidth(); 918 Align = Target->getLongDoubleAlign(); 919 break; 920 case BuiltinType::NullPtr: 921 Width = Target->getPointerWidth(0); // C++ 3.9.1p11: sizeof(nullptr_t) 922 Align = Target->getPointerAlign(0); // == sizeof(void*) 923 break; 924 case BuiltinType::ObjCId: 925 case BuiltinType::ObjCClass: 926 case BuiltinType::ObjCSel: 927 Width = Target->getPointerWidth(0); 928 Align = Target->getPointerAlign(0); 929 break; 930 } 931 break; 932 case Type::ObjCObjectPointer: 933 Width = Target->getPointerWidth(0); 934 Align = Target->getPointerAlign(0); 935 break; 936 case Type::BlockPointer: { 937 unsigned AS = getTargetAddressSpace( 938 cast<BlockPointerType>(T)->getPointeeType()); 939 Width = Target->getPointerWidth(AS); 940 Align = Target->getPointerAlign(AS); 941 break; 942 } 943 case Type::LValueReference: 944 case Type::RValueReference: { 945 // alignof and sizeof should never enter this code path here, so we go 946 // the pointer route. 947 unsigned AS = getTargetAddressSpace( 948 cast<ReferenceType>(T)->getPointeeType()); 949 Width = Target->getPointerWidth(AS); 950 Align = Target->getPointerAlign(AS); 951 break; 952 } 953 case Type::Pointer: { 954 unsigned AS = getTargetAddressSpace(cast<PointerType>(T)->getPointeeType()); 955 Width = Target->getPointerWidth(AS); 956 Align = Target->getPointerAlign(AS); 957 break; 958 } 959 case Type::MemberPointer: { 960 const MemberPointerType *MPT = cast<MemberPointerType>(T); 961 std::pair<uint64_t, unsigned> PtrDiffInfo = 962 getTypeInfo(getPointerDiffType()); 963 Width = PtrDiffInfo.first * ABI->getMemberPointerSize(MPT); 964 Align = PtrDiffInfo.second; 965 break; 966 } 967 case Type::Complex: { 968 // Complex types have the same alignment as their elements, but twice the 969 // size. 970 std::pair<uint64_t, unsigned> EltInfo = 971 getTypeInfo(cast<ComplexType>(T)->getElementType()); 972 Width = EltInfo.first*2; 973 Align = EltInfo.second; 974 break; 975 } 976 case Type::ObjCObject: 977 return getTypeInfo(cast<ObjCObjectType>(T)->getBaseType().getTypePtr()); 978 case Type::ObjCInterface: { 979 const ObjCInterfaceType *ObjCI = cast<ObjCInterfaceType>(T); 980 const ASTRecordLayout &Layout = getASTObjCInterfaceLayout(ObjCI->getDecl()); 981 Width = toBits(Layout.getSize()); 982 Align = toBits(Layout.getAlignment()); 983 break; 984 } 985 case Type::Record: 986 case Type::Enum: { 987 const TagType *TT = cast<TagType>(T); 988 989 if (TT->getDecl()->isInvalidDecl()) { 990 Width = 8; 991 Align = 8; 992 break; 993 } 994 995 if (const EnumType *ET = dyn_cast<EnumType>(TT)) 996 return getTypeInfo(ET->getDecl()->getIntegerType()); 997 998 const RecordType *RT = cast<RecordType>(TT); 999 const ASTRecordLayout &Layout = getASTRecordLayout(RT->getDecl()); 1000 Width = toBits(Layout.getSize()); 1001 Align = toBits(Layout.getAlignment()); 1002 break; 1003 } 1004 1005 case Type::SubstTemplateTypeParm: 1006 return getTypeInfo(cast<SubstTemplateTypeParmType>(T)-> 1007 getReplacementType().getTypePtr()); 1008 1009 case Type::Auto: { 1010 const AutoType *A = cast<AutoType>(T); 1011 assert(A->isDeduced() && "Cannot request the size of a dependent type"); 1012 return getTypeInfo(A->getDeducedType().getTypePtr()); 1013 } 1014 1015 case Type::Paren: 1016 return getTypeInfo(cast<ParenType>(T)->getInnerType().getTypePtr()); 1017 1018 case Type::Typedef: { 1019 const TypedefNameDecl *Typedef = cast<TypedefType>(T)->getDecl(); 1020 std::pair<uint64_t, unsigned> Info 1021 = getTypeInfo(Typedef->getUnderlyingType().getTypePtr()); 1022 // If the typedef has an aligned attribute on it, it overrides any computed 1023 // alignment we have. This violates the GCC documentation (which says that 1024 // attribute(aligned) can only round up) but matches its implementation. 1025 if (unsigned AttrAlign = Typedef->getMaxAlignment()) 1026 Align = AttrAlign; 1027 else 1028 Align = Info.second; 1029 Width = Info.first; 1030 break; 1031 } 1032 1033 case Type::TypeOfExpr: 1034 return getTypeInfo(cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType() 1035 .getTypePtr()); 1036 1037 case Type::TypeOf: 1038 return getTypeInfo(cast<TypeOfType>(T)->getUnderlyingType().getTypePtr()); 1039 1040 case Type::Decltype: 1041 return getTypeInfo(cast<DecltypeType>(T)->getUnderlyingExpr()->getType() 1042 .getTypePtr()); 1043 1044 case Type::UnaryTransform: 1045 return getTypeInfo(cast<UnaryTransformType>(T)->getUnderlyingType()); 1046 1047 case Type::Elaborated: 1048 return getTypeInfo(cast<ElaboratedType>(T)->getNamedType().getTypePtr()); 1049 1050 case Type::Attributed: 1051 return getTypeInfo( 1052 cast<AttributedType>(T)->getEquivalentType().getTypePtr()); 1053 1054 case Type::TemplateSpecialization: { 1055 assert(getCanonicalType(T) != T && 1056 "Cannot request the size of a dependent type"); 1057 const TemplateSpecializationType *TST = cast<TemplateSpecializationType>(T); 1058 // A type alias template specialization may refer to a typedef with the 1059 // aligned attribute on it. 1060 if (TST->isTypeAlias()) 1061 return getTypeInfo(TST->getAliasedType().getTypePtr()); 1062 else 1063 return getTypeInfo(getCanonicalType(T)); 1064 } 1065 1066 } 1067 1068 assert(Align && (Align & (Align-1)) == 0 && "Alignment must be power of 2"); 1069 return std::make_pair(Width, Align); 1070} 1071 1072/// toCharUnitsFromBits - Convert a size in bits to a size in characters. 1073CharUnits ASTContext::toCharUnitsFromBits(int64_t BitSize) const { 1074 return CharUnits::fromQuantity(BitSize / getCharWidth()); 1075} 1076 1077/// toBits - Convert a size in characters to a size in characters. 1078int64_t ASTContext::toBits(CharUnits CharSize) const { 1079 return CharSize.getQuantity() * getCharWidth(); 1080} 1081 1082/// getTypeSizeInChars - Return the size of the specified type, in characters. 1083/// This method does not work on incomplete types. 1084CharUnits ASTContext::getTypeSizeInChars(QualType T) const { 1085 return toCharUnitsFromBits(getTypeSize(T)); 1086} 1087CharUnits ASTContext::getTypeSizeInChars(const Type *T) const { 1088 return toCharUnitsFromBits(getTypeSize(T)); 1089} 1090 1091/// getTypeAlignInChars - Return the ABI-specified alignment of a type, in 1092/// characters. This method does not work on incomplete types. 1093CharUnits ASTContext::getTypeAlignInChars(QualType T) const { 1094 return toCharUnitsFromBits(getTypeAlign(T)); 1095} 1096CharUnits ASTContext::getTypeAlignInChars(const Type *T) const { 1097 return toCharUnitsFromBits(getTypeAlign(T)); 1098} 1099 1100/// getPreferredTypeAlign - Return the "preferred" alignment of the specified 1101/// type for the current target in bits. This can be different than the ABI 1102/// alignment in cases where it is beneficial for performance to overalign 1103/// a data type. 1104unsigned ASTContext::getPreferredTypeAlign(const Type *T) const { 1105 unsigned ABIAlign = getTypeAlign(T); 1106 1107 // Double and long long should be naturally aligned if possible. 1108 if (const ComplexType* CT = T->getAs<ComplexType>()) 1109 T = CT->getElementType().getTypePtr(); 1110 if (T->isSpecificBuiltinType(BuiltinType::Double) || 1111 T->isSpecificBuiltinType(BuiltinType::LongLong)) 1112 return std::max(ABIAlign, (unsigned)getTypeSize(T)); 1113 1114 return ABIAlign; 1115} 1116 1117/// DeepCollectObjCIvars - 1118/// This routine first collects all declared, but not synthesized, ivars in 1119/// super class and then collects all ivars, including those synthesized for 1120/// current class. This routine is used for implementation of current class 1121/// when all ivars, declared and synthesized are known. 1122/// 1123void ASTContext::DeepCollectObjCIvars(const ObjCInterfaceDecl *OI, 1124 bool leafClass, 1125 SmallVectorImpl<const ObjCIvarDecl*> &Ivars) const { 1126 if (const ObjCInterfaceDecl *SuperClass = OI->getSuperClass()) 1127 DeepCollectObjCIvars(SuperClass, false, Ivars); 1128 if (!leafClass) { 1129 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 1130 E = OI->ivar_end(); I != E; ++I) 1131 Ivars.push_back(*I); 1132 } else { 1133 ObjCInterfaceDecl *IDecl = const_cast<ObjCInterfaceDecl *>(OI); 1134 for (const ObjCIvarDecl *Iv = IDecl->all_declared_ivar_begin(); Iv; 1135 Iv= Iv->getNextIvar()) 1136 Ivars.push_back(Iv); 1137 } 1138} 1139 1140/// CollectInheritedProtocols - Collect all protocols in current class and 1141/// those inherited by it. 1142void ASTContext::CollectInheritedProtocols(const Decl *CDecl, 1143 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols) { 1144 if (const ObjCInterfaceDecl *OI = dyn_cast<ObjCInterfaceDecl>(CDecl)) { 1145 // We can use protocol_iterator here instead of 1146 // all_referenced_protocol_iterator since we are walking all categories. 1147 for (ObjCInterfaceDecl::all_protocol_iterator P = OI->all_referenced_protocol_begin(), 1148 PE = OI->all_referenced_protocol_end(); P != PE; ++P) { 1149 ObjCProtocolDecl *Proto = (*P); 1150 Protocols.insert(Proto); 1151 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1152 PE = Proto->protocol_end(); P != PE; ++P) { 1153 Protocols.insert(*P); 1154 CollectInheritedProtocols(*P, Protocols); 1155 } 1156 } 1157 1158 // Categories of this Interface. 1159 for (const ObjCCategoryDecl *CDeclChain = OI->getCategoryList(); 1160 CDeclChain; CDeclChain = CDeclChain->getNextClassCategory()) 1161 CollectInheritedProtocols(CDeclChain, Protocols); 1162 if (ObjCInterfaceDecl *SD = OI->getSuperClass()) 1163 while (SD) { 1164 CollectInheritedProtocols(SD, Protocols); 1165 SD = SD->getSuperClass(); 1166 } 1167 } else if (const ObjCCategoryDecl *OC = dyn_cast<ObjCCategoryDecl>(CDecl)) { 1168 for (ObjCCategoryDecl::protocol_iterator P = OC->protocol_begin(), 1169 PE = OC->protocol_end(); P != PE; ++P) { 1170 ObjCProtocolDecl *Proto = (*P); 1171 Protocols.insert(Proto); 1172 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1173 PE = Proto->protocol_end(); P != PE; ++P) 1174 CollectInheritedProtocols(*P, Protocols); 1175 } 1176 } else if (const ObjCProtocolDecl *OP = dyn_cast<ObjCProtocolDecl>(CDecl)) { 1177 for (ObjCProtocolDecl::protocol_iterator P = OP->protocol_begin(), 1178 PE = OP->protocol_end(); P != PE; ++P) { 1179 ObjCProtocolDecl *Proto = (*P); 1180 Protocols.insert(Proto); 1181 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1182 PE = Proto->protocol_end(); P != PE; ++P) 1183 CollectInheritedProtocols(*P, Protocols); 1184 } 1185 } 1186} 1187 1188unsigned ASTContext::CountNonClassIvars(const ObjCInterfaceDecl *OI) const { 1189 unsigned count = 0; 1190 // Count ivars declared in class extension. 1191 for (const ObjCCategoryDecl *CDecl = OI->getFirstClassExtension(); CDecl; 1192 CDecl = CDecl->getNextClassExtension()) 1193 count += CDecl->ivar_size(); 1194 1195 // Count ivar defined in this class's implementation. This 1196 // includes synthesized ivars. 1197 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) 1198 count += ImplDecl->ivar_size(); 1199 1200 return count; 1201} 1202 1203/// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 1204ObjCImplementationDecl *ASTContext::getObjCImplementation(ObjCInterfaceDecl *D) { 1205 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 1206 I = ObjCImpls.find(D); 1207 if (I != ObjCImpls.end()) 1208 return cast<ObjCImplementationDecl>(I->second); 1209 return 0; 1210} 1211/// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 1212ObjCCategoryImplDecl *ASTContext::getObjCImplementation(ObjCCategoryDecl *D) { 1213 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 1214 I = ObjCImpls.find(D); 1215 if (I != ObjCImpls.end()) 1216 return cast<ObjCCategoryImplDecl>(I->second); 1217 return 0; 1218} 1219 1220/// \brief Set the implementation of ObjCInterfaceDecl. 1221void ASTContext::setObjCImplementation(ObjCInterfaceDecl *IFaceD, 1222 ObjCImplementationDecl *ImplD) { 1223 assert(IFaceD && ImplD && "Passed null params"); 1224 ObjCImpls[IFaceD] = ImplD; 1225} 1226/// \brief Set the implementation of ObjCCategoryDecl. 1227void ASTContext::setObjCImplementation(ObjCCategoryDecl *CatD, 1228 ObjCCategoryImplDecl *ImplD) { 1229 assert(CatD && ImplD && "Passed null params"); 1230 ObjCImpls[CatD] = ImplD; 1231} 1232 1233/// \brief Get the copy initialization expression of VarDecl,or NULL if 1234/// none exists. 1235Expr *ASTContext::getBlockVarCopyInits(const VarDecl*VD) { 1236 assert(VD && "Passed null params"); 1237 assert(VD->hasAttr<BlocksAttr>() && 1238 "getBlockVarCopyInits - not __block var"); 1239 llvm::DenseMap<const VarDecl*, Expr*>::iterator 1240 I = BlockVarCopyInits.find(VD); 1241 return (I != BlockVarCopyInits.end()) ? cast<Expr>(I->second) : 0; 1242} 1243 1244/// \brief Set the copy inialization expression of a block var decl. 1245void ASTContext::setBlockVarCopyInits(VarDecl*VD, Expr* Init) { 1246 assert(VD && Init && "Passed null params"); 1247 assert(VD->hasAttr<BlocksAttr>() && 1248 "setBlockVarCopyInits - not __block var"); 1249 BlockVarCopyInits[VD] = Init; 1250} 1251 1252/// \brief Allocate an uninitialized TypeSourceInfo. 1253/// 1254/// The caller should initialize the memory held by TypeSourceInfo using 1255/// the TypeLoc wrappers. 1256/// 1257/// \param T the type that will be the basis for type source info. This type 1258/// should refer to how the declarator was written in source code, not to 1259/// what type semantic analysis resolved the declarator to. 1260TypeSourceInfo *ASTContext::CreateTypeSourceInfo(QualType T, 1261 unsigned DataSize) const { 1262 if (!DataSize) 1263 DataSize = TypeLoc::getFullDataSizeForType(T); 1264 else 1265 assert(DataSize == TypeLoc::getFullDataSizeForType(T) && 1266 "incorrect data size provided to CreateTypeSourceInfo!"); 1267 1268 TypeSourceInfo *TInfo = 1269 (TypeSourceInfo*)BumpAlloc.Allocate(sizeof(TypeSourceInfo) + DataSize, 8); 1270 new (TInfo) TypeSourceInfo(T); 1271 return TInfo; 1272} 1273 1274TypeSourceInfo *ASTContext::getTrivialTypeSourceInfo(QualType T, 1275 SourceLocation L) const { 1276 TypeSourceInfo *DI = CreateTypeSourceInfo(T); 1277 DI->getTypeLoc().initialize(const_cast<ASTContext &>(*this), L); 1278 return DI; 1279} 1280 1281const ASTRecordLayout & 1282ASTContext::getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) const { 1283 return getObjCLayout(D, 0); 1284} 1285 1286const ASTRecordLayout & 1287ASTContext::getASTObjCImplementationLayout( 1288 const ObjCImplementationDecl *D) const { 1289 return getObjCLayout(D->getClassInterface(), D); 1290} 1291 1292//===----------------------------------------------------------------------===// 1293// Type creation/memoization methods 1294//===----------------------------------------------------------------------===// 1295 1296QualType 1297ASTContext::getExtQualType(const Type *baseType, Qualifiers quals) const { 1298 unsigned fastQuals = quals.getFastQualifiers(); 1299 quals.removeFastQualifiers(); 1300 1301 // Check if we've already instantiated this type. 1302 llvm::FoldingSetNodeID ID; 1303 ExtQuals::Profile(ID, baseType, quals); 1304 void *insertPos = 0; 1305 if (ExtQuals *eq = ExtQualNodes.FindNodeOrInsertPos(ID, insertPos)) { 1306 assert(eq->getQualifiers() == quals); 1307 return QualType(eq, fastQuals); 1308 } 1309 1310 // If the base type is not canonical, make the appropriate canonical type. 1311 QualType canon; 1312 if (!baseType->isCanonicalUnqualified()) { 1313 SplitQualType canonSplit = baseType->getCanonicalTypeInternal().split(); 1314 canonSplit.second.addConsistentQualifiers(quals); 1315 canon = getExtQualType(canonSplit.first, canonSplit.second); 1316 1317 // Re-find the insert position. 1318 (void) ExtQualNodes.FindNodeOrInsertPos(ID, insertPos); 1319 } 1320 1321 ExtQuals *eq = new (*this, TypeAlignment) ExtQuals(baseType, canon, quals); 1322 ExtQualNodes.InsertNode(eq, insertPos); 1323 return QualType(eq, fastQuals); 1324} 1325 1326QualType 1327ASTContext::getAddrSpaceQualType(QualType T, unsigned AddressSpace) const { 1328 QualType CanT = getCanonicalType(T); 1329 if (CanT.getAddressSpace() == AddressSpace) 1330 return T; 1331 1332 // If we are composing extended qualifiers together, merge together 1333 // into one ExtQuals node. 1334 QualifierCollector Quals; 1335 const Type *TypeNode = Quals.strip(T); 1336 1337 // If this type already has an address space specified, it cannot get 1338 // another one. 1339 assert(!Quals.hasAddressSpace() && 1340 "Type cannot be in multiple addr spaces!"); 1341 Quals.addAddressSpace(AddressSpace); 1342 1343 return getExtQualType(TypeNode, Quals); 1344} 1345 1346QualType ASTContext::getObjCGCQualType(QualType T, 1347 Qualifiers::GC GCAttr) const { 1348 QualType CanT = getCanonicalType(T); 1349 if (CanT.getObjCGCAttr() == GCAttr) 1350 return T; 1351 1352 if (const PointerType *ptr = T->getAs<PointerType>()) { 1353 QualType Pointee = ptr->getPointeeType(); 1354 if (Pointee->isAnyPointerType()) { 1355 QualType ResultType = getObjCGCQualType(Pointee, GCAttr); 1356 return getPointerType(ResultType); 1357 } 1358 } 1359 1360 // If we are composing extended qualifiers together, merge together 1361 // into one ExtQuals node. 1362 QualifierCollector Quals; 1363 const Type *TypeNode = Quals.strip(T); 1364 1365 // If this type already has an ObjCGC specified, it cannot get 1366 // another one. 1367 assert(!Quals.hasObjCGCAttr() && 1368 "Type cannot have multiple ObjCGCs!"); 1369 Quals.addObjCGCAttr(GCAttr); 1370 1371 return getExtQualType(TypeNode, Quals); 1372} 1373 1374const FunctionType *ASTContext::adjustFunctionType(const FunctionType *T, 1375 FunctionType::ExtInfo Info) { 1376 if (T->getExtInfo() == Info) 1377 return T; 1378 1379 QualType Result; 1380 if (const FunctionNoProtoType *FNPT = dyn_cast<FunctionNoProtoType>(T)) { 1381 Result = getFunctionNoProtoType(FNPT->getResultType(), Info); 1382 } else { 1383 const FunctionProtoType *FPT = cast<FunctionProtoType>(T); 1384 FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); 1385 EPI.ExtInfo = Info; 1386 Result = getFunctionType(FPT->getResultType(), FPT->arg_type_begin(), 1387 FPT->getNumArgs(), EPI); 1388 } 1389 1390 return cast<FunctionType>(Result.getTypePtr()); 1391} 1392 1393/// getComplexType - Return the uniqued reference to the type for a complex 1394/// number with the specified element type. 1395QualType ASTContext::getComplexType(QualType T) const { 1396 // Unique pointers, to guarantee there is only one pointer of a particular 1397 // structure. 1398 llvm::FoldingSetNodeID ID; 1399 ComplexType::Profile(ID, T); 1400 1401 void *InsertPos = 0; 1402 if (ComplexType *CT = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos)) 1403 return QualType(CT, 0); 1404 1405 // If the pointee type isn't canonical, this won't be a canonical type either, 1406 // so fill in the canonical type field. 1407 QualType Canonical; 1408 if (!T.isCanonical()) { 1409 Canonical = getComplexType(getCanonicalType(T)); 1410 1411 // Get the new insert position for the node we care about. 1412 ComplexType *NewIP = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos); 1413 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1414 } 1415 ComplexType *New = new (*this, TypeAlignment) ComplexType(T, Canonical); 1416 Types.push_back(New); 1417 ComplexTypes.InsertNode(New, InsertPos); 1418 return QualType(New, 0); 1419} 1420 1421/// getPointerType - Return the uniqued reference to the type for a pointer to 1422/// the specified type. 1423QualType ASTContext::getPointerType(QualType T) const { 1424 // Unique pointers, to guarantee there is only one pointer of a particular 1425 // structure. 1426 llvm::FoldingSetNodeID ID; 1427 PointerType::Profile(ID, T); 1428 1429 void *InsertPos = 0; 1430 if (PointerType *PT = PointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1431 return QualType(PT, 0); 1432 1433 // If the pointee type isn't canonical, this won't be a canonical type either, 1434 // so fill in the canonical type field. 1435 QualType Canonical; 1436 if (!T.isCanonical()) { 1437 Canonical = getPointerType(getCanonicalType(T)); 1438 1439 // Get the new insert position for the node we care about. 1440 PointerType *NewIP = PointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1441 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1442 } 1443 PointerType *New = new (*this, TypeAlignment) PointerType(T, Canonical); 1444 Types.push_back(New); 1445 PointerTypes.InsertNode(New, InsertPos); 1446 return QualType(New, 0); 1447} 1448 1449/// getBlockPointerType - Return the uniqued reference to the type for 1450/// a pointer to the specified block. 1451QualType ASTContext::getBlockPointerType(QualType T) const { 1452 assert(T->isFunctionType() && "block of function types only"); 1453 // Unique pointers, to guarantee there is only one block of a particular 1454 // structure. 1455 llvm::FoldingSetNodeID ID; 1456 BlockPointerType::Profile(ID, T); 1457 1458 void *InsertPos = 0; 1459 if (BlockPointerType *PT = 1460 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1461 return QualType(PT, 0); 1462 1463 // If the block pointee type isn't canonical, this won't be a canonical 1464 // type either so fill in the canonical type field. 1465 QualType Canonical; 1466 if (!T.isCanonical()) { 1467 Canonical = getBlockPointerType(getCanonicalType(T)); 1468 1469 // Get the new insert position for the node we care about. 1470 BlockPointerType *NewIP = 1471 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1472 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1473 } 1474 BlockPointerType *New 1475 = new (*this, TypeAlignment) BlockPointerType(T, Canonical); 1476 Types.push_back(New); 1477 BlockPointerTypes.InsertNode(New, InsertPos); 1478 return QualType(New, 0); 1479} 1480 1481/// getLValueReferenceType - Return the uniqued reference to the type for an 1482/// lvalue reference to the specified type. 1483QualType 1484ASTContext::getLValueReferenceType(QualType T, bool SpelledAsLValue) const { 1485 assert(getCanonicalType(T) != OverloadTy && 1486 "Unresolved overloaded function type"); 1487 1488 // Unique pointers, to guarantee there is only one pointer of a particular 1489 // structure. 1490 llvm::FoldingSetNodeID ID; 1491 ReferenceType::Profile(ID, T, SpelledAsLValue); 1492 1493 void *InsertPos = 0; 1494 if (LValueReferenceType *RT = 1495 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1496 return QualType(RT, 0); 1497 1498 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1499 1500 // If the referencee type isn't canonical, this won't be a canonical type 1501 // either, so fill in the canonical type field. 1502 QualType Canonical; 1503 if (!SpelledAsLValue || InnerRef || !T.isCanonical()) { 1504 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1505 Canonical = getLValueReferenceType(getCanonicalType(PointeeType)); 1506 1507 // Get the new insert position for the node we care about. 1508 LValueReferenceType *NewIP = 1509 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1510 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1511 } 1512 1513 LValueReferenceType *New 1514 = new (*this, TypeAlignment) LValueReferenceType(T, Canonical, 1515 SpelledAsLValue); 1516 Types.push_back(New); 1517 LValueReferenceTypes.InsertNode(New, InsertPos); 1518 1519 return QualType(New, 0); 1520} 1521 1522/// getRValueReferenceType - Return the uniqued reference to the type for an 1523/// rvalue reference to the specified type. 1524QualType ASTContext::getRValueReferenceType(QualType T) const { 1525 // Unique pointers, to guarantee there is only one pointer of a particular 1526 // structure. 1527 llvm::FoldingSetNodeID ID; 1528 ReferenceType::Profile(ID, T, false); 1529 1530 void *InsertPos = 0; 1531 if (RValueReferenceType *RT = 1532 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1533 return QualType(RT, 0); 1534 1535 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1536 1537 // If the referencee type isn't canonical, this won't be a canonical type 1538 // either, so fill in the canonical type field. 1539 QualType Canonical; 1540 if (InnerRef || !T.isCanonical()) { 1541 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1542 Canonical = getRValueReferenceType(getCanonicalType(PointeeType)); 1543 1544 // Get the new insert position for the node we care about. 1545 RValueReferenceType *NewIP = 1546 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1547 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1548 } 1549 1550 RValueReferenceType *New 1551 = new (*this, TypeAlignment) RValueReferenceType(T, Canonical); 1552 Types.push_back(New); 1553 RValueReferenceTypes.InsertNode(New, InsertPos); 1554 return QualType(New, 0); 1555} 1556 1557/// getMemberPointerType - Return the uniqued reference to the type for a 1558/// member pointer to the specified type, in the specified class. 1559QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls) const { 1560 // Unique pointers, to guarantee there is only one pointer of a particular 1561 // structure. 1562 llvm::FoldingSetNodeID ID; 1563 MemberPointerType::Profile(ID, T, Cls); 1564 1565 void *InsertPos = 0; 1566 if (MemberPointerType *PT = 1567 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1568 return QualType(PT, 0); 1569 1570 // If the pointee or class type isn't canonical, this won't be a canonical 1571 // type either, so fill in the canonical type field. 1572 QualType Canonical; 1573 if (!T.isCanonical() || !Cls->isCanonicalUnqualified()) { 1574 Canonical = getMemberPointerType(getCanonicalType(T),getCanonicalType(Cls)); 1575 1576 // Get the new insert position for the node we care about. 1577 MemberPointerType *NewIP = 1578 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1579 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1580 } 1581 MemberPointerType *New 1582 = new (*this, TypeAlignment) MemberPointerType(T, Cls, Canonical); 1583 Types.push_back(New); 1584 MemberPointerTypes.InsertNode(New, InsertPos); 1585 return QualType(New, 0); 1586} 1587 1588/// getConstantArrayType - Return the unique reference to the type for an 1589/// array of the specified element type. 1590QualType ASTContext::getConstantArrayType(QualType EltTy, 1591 const llvm::APInt &ArySizeIn, 1592 ArrayType::ArraySizeModifier ASM, 1593 unsigned IndexTypeQuals) const { 1594 assert((EltTy->isDependentType() || 1595 EltTy->isIncompleteType() || EltTy->isConstantSizeType()) && 1596 "Constant array of VLAs is illegal!"); 1597 1598 // Convert the array size into a canonical width matching the pointer size for 1599 // the target. 1600 llvm::APInt ArySize(ArySizeIn); 1601 ArySize = 1602 ArySize.zextOrTrunc(Target->getPointerWidth(getTargetAddressSpace(EltTy))); 1603 1604 llvm::FoldingSetNodeID ID; 1605 ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, IndexTypeQuals); 1606 1607 void *InsertPos = 0; 1608 if (ConstantArrayType *ATP = 1609 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1610 return QualType(ATP, 0); 1611 1612 // If the element type isn't canonical or has qualifiers, this won't 1613 // be a canonical type either, so fill in the canonical type field. 1614 QualType Canon; 1615 if (!EltTy.isCanonical() || EltTy.hasLocalQualifiers()) { 1616 SplitQualType canonSplit = getCanonicalType(EltTy).split(); 1617 Canon = getConstantArrayType(QualType(canonSplit.first, 0), ArySize, 1618 ASM, IndexTypeQuals); 1619 Canon = getQualifiedType(Canon, canonSplit.second); 1620 1621 // Get the new insert position for the node we care about. 1622 ConstantArrayType *NewIP = 1623 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1624 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1625 } 1626 1627 ConstantArrayType *New = new(*this,TypeAlignment) 1628 ConstantArrayType(EltTy, Canon, ArySize, ASM, IndexTypeQuals); 1629 ConstantArrayTypes.InsertNode(New, InsertPos); 1630 Types.push_back(New); 1631 return QualType(New, 0); 1632} 1633 1634/// getVariableArrayDecayedType - Turns the given type, which may be 1635/// variably-modified, into the corresponding type with all the known 1636/// sizes replaced with [*]. 1637QualType ASTContext::getVariableArrayDecayedType(QualType type) const { 1638 // Vastly most common case. 1639 if (!type->isVariablyModifiedType()) return type; 1640 1641 QualType result; 1642 1643 SplitQualType split = type.getSplitDesugaredType(); 1644 const Type *ty = split.first; 1645 switch (ty->getTypeClass()) { 1646#define TYPE(Class, Base) 1647#define ABSTRACT_TYPE(Class, Base) 1648#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 1649#include "clang/AST/TypeNodes.def" 1650 llvm_unreachable("didn't desugar past all non-canonical types?"); 1651 1652 // These types should never be variably-modified. 1653 case Type::Builtin: 1654 case Type::Complex: 1655 case Type::Vector: 1656 case Type::ExtVector: 1657 case Type::DependentSizedExtVector: 1658 case Type::ObjCObject: 1659 case Type::ObjCInterface: 1660 case Type::ObjCObjectPointer: 1661 case Type::Record: 1662 case Type::Enum: 1663 case Type::UnresolvedUsing: 1664 case Type::TypeOfExpr: 1665 case Type::TypeOf: 1666 case Type::Decltype: 1667 case Type::UnaryTransform: 1668 case Type::DependentName: 1669 case Type::InjectedClassName: 1670 case Type::TemplateSpecialization: 1671 case Type::DependentTemplateSpecialization: 1672 case Type::TemplateTypeParm: 1673 case Type::SubstTemplateTypeParmPack: 1674 case Type::Auto: 1675 case Type::PackExpansion: 1676 llvm_unreachable("type should never be variably-modified"); 1677 1678 // These types can be variably-modified but should never need to 1679 // further decay. 1680 case Type::FunctionNoProto: 1681 case Type::FunctionProto: 1682 case Type::BlockPointer: 1683 case Type::MemberPointer: 1684 return type; 1685 1686 // These types can be variably-modified. All these modifications 1687 // preserve structure except as noted by comments. 1688 // TODO: if we ever care about optimizing VLAs, there are no-op 1689 // optimizations available here. 1690 case Type::Pointer: 1691 result = getPointerType(getVariableArrayDecayedType( 1692 cast<PointerType>(ty)->getPointeeType())); 1693 break; 1694 1695 case Type::LValueReference: { 1696 const LValueReferenceType *lv = cast<LValueReferenceType>(ty); 1697 result = getLValueReferenceType( 1698 getVariableArrayDecayedType(lv->getPointeeType()), 1699 lv->isSpelledAsLValue()); 1700 break; 1701 } 1702 1703 case Type::RValueReference: { 1704 const RValueReferenceType *lv = cast<RValueReferenceType>(ty); 1705 result = getRValueReferenceType( 1706 getVariableArrayDecayedType(lv->getPointeeType())); 1707 break; 1708 } 1709 1710 case Type::ConstantArray: { 1711 const ConstantArrayType *cat = cast<ConstantArrayType>(ty); 1712 result = getConstantArrayType( 1713 getVariableArrayDecayedType(cat->getElementType()), 1714 cat->getSize(), 1715 cat->getSizeModifier(), 1716 cat->getIndexTypeCVRQualifiers()); 1717 break; 1718 } 1719 1720 case Type::DependentSizedArray: { 1721 const DependentSizedArrayType *dat = cast<DependentSizedArrayType>(ty); 1722 result = getDependentSizedArrayType( 1723 getVariableArrayDecayedType(dat->getElementType()), 1724 dat->getSizeExpr(), 1725 dat->getSizeModifier(), 1726 dat->getIndexTypeCVRQualifiers(), 1727 dat->getBracketsRange()); 1728 break; 1729 } 1730 1731 // Turn incomplete types into [*] types. 1732 case Type::IncompleteArray: { 1733 const IncompleteArrayType *iat = cast<IncompleteArrayType>(ty); 1734 result = getVariableArrayType( 1735 getVariableArrayDecayedType(iat->getElementType()), 1736 /*size*/ 0, 1737 ArrayType::Normal, 1738 iat->getIndexTypeCVRQualifiers(), 1739 SourceRange()); 1740 break; 1741 } 1742 1743 // Turn VLA types into [*] types. 1744 case Type::VariableArray: { 1745 const VariableArrayType *vat = cast<VariableArrayType>(ty); 1746 result = getVariableArrayType( 1747 getVariableArrayDecayedType(vat->getElementType()), 1748 /*size*/ 0, 1749 ArrayType::Star, 1750 vat->getIndexTypeCVRQualifiers(), 1751 vat->getBracketsRange()); 1752 break; 1753 } 1754 } 1755 1756 // Apply the top-level qualifiers from the original. 1757 return getQualifiedType(result, split.second); 1758} 1759 1760/// getVariableArrayType - Returns a non-unique reference to the type for a 1761/// variable array of the specified element type. 1762QualType ASTContext::getVariableArrayType(QualType EltTy, 1763 Expr *NumElts, 1764 ArrayType::ArraySizeModifier ASM, 1765 unsigned IndexTypeQuals, 1766 SourceRange Brackets) const { 1767 // Since we don't unique expressions, it isn't possible to unique VLA's 1768 // that have an expression provided for their size. 1769 QualType Canon; 1770 1771 // Be sure to pull qualifiers off the element type. 1772 if (!EltTy.isCanonical() || EltTy.hasLocalQualifiers()) { 1773 SplitQualType canonSplit = getCanonicalType(EltTy).split(); 1774 Canon = getVariableArrayType(QualType(canonSplit.first, 0), NumElts, ASM, 1775 IndexTypeQuals, Brackets); 1776 Canon = getQualifiedType(Canon, canonSplit.second); 1777 } 1778 1779 VariableArrayType *New = new(*this, TypeAlignment) 1780 VariableArrayType(EltTy, Canon, NumElts, ASM, IndexTypeQuals, Brackets); 1781 1782 VariableArrayTypes.push_back(New); 1783 Types.push_back(New); 1784 return QualType(New, 0); 1785} 1786 1787/// getDependentSizedArrayType - Returns a non-unique reference to 1788/// the type for a dependently-sized array of the specified element 1789/// type. 1790QualType ASTContext::getDependentSizedArrayType(QualType elementType, 1791 Expr *numElements, 1792 ArrayType::ArraySizeModifier ASM, 1793 unsigned elementTypeQuals, 1794 SourceRange brackets) const { 1795 assert((!numElements || numElements->isTypeDependent() || 1796 numElements->isValueDependent()) && 1797 "Size must be type- or value-dependent!"); 1798 1799 // Dependently-sized array types that do not have a specified number 1800 // of elements will have their sizes deduced from a dependent 1801 // initializer. We do no canonicalization here at all, which is okay 1802 // because they can't be used in most locations. 1803 if (!numElements) { 1804 DependentSizedArrayType *newType 1805 = new (*this, TypeAlignment) 1806 DependentSizedArrayType(*this, elementType, QualType(), 1807 numElements, ASM, elementTypeQuals, 1808 brackets); 1809 Types.push_back(newType); 1810 return QualType(newType, 0); 1811 } 1812 1813 // Otherwise, we actually build a new type every time, but we 1814 // also build a canonical type. 1815 1816 SplitQualType canonElementType = getCanonicalType(elementType).split(); 1817 1818 void *insertPos = 0; 1819 llvm::FoldingSetNodeID ID; 1820 DependentSizedArrayType::Profile(ID, *this, 1821 QualType(canonElementType.first, 0), 1822 ASM, elementTypeQuals, numElements); 1823 1824 // Look for an existing type with these properties. 1825 DependentSizedArrayType *canonTy = 1826 DependentSizedArrayTypes.FindNodeOrInsertPos(ID, insertPos); 1827 1828 // If we don't have one, build one. 1829 if (!canonTy) { 1830 canonTy = new (*this, TypeAlignment) 1831 DependentSizedArrayType(*this, QualType(canonElementType.first, 0), 1832 QualType(), numElements, ASM, elementTypeQuals, 1833 brackets); 1834 DependentSizedArrayTypes.InsertNode(canonTy, insertPos); 1835 Types.push_back(canonTy); 1836 } 1837 1838 // Apply qualifiers from the element type to the array. 1839 QualType canon = getQualifiedType(QualType(canonTy,0), 1840 canonElementType.second); 1841 1842 // If we didn't need extra canonicalization for the element type, 1843 // then just use that as our result. 1844 if (QualType(canonElementType.first, 0) == elementType) 1845 return canon; 1846 1847 // Otherwise, we need to build a type which follows the spelling 1848 // of the element type. 1849 DependentSizedArrayType *sugaredType 1850 = new (*this, TypeAlignment) 1851 DependentSizedArrayType(*this, elementType, canon, numElements, 1852 ASM, elementTypeQuals, brackets); 1853 Types.push_back(sugaredType); 1854 return QualType(sugaredType, 0); 1855} 1856 1857QualType ASTContext::getIncompleteArrayType(QualType elementType, 1858 ArrayType::ArraySizeModifier ASM, 1859 unsigned elementTypeQuals) const { 1860 llvm::FoldingSetNodeID ID; 1861 IncompleteArrayType::Profile(ID, elementType, ASM, elementTypeQuals); 1862 1863 void *insertPos = 0; 1864 if (IncompleteArrayType *iat = 1865 IncompleteArrayTypes.FindNodeOrInsertPos(ID, insertPos)) 1866 return QualType(iat, 0); 1867 1868 // If the element type isn't canonical, this won't be a canonical type 1869 // either, so fill in the canonical type field. We also have to pull 1870 // qualifiers off the element type. 1871 QualType canon; 1872 1873 if (!elementType.isCanonical() || elementType.hasLocalQualifiers()) { 1874 SplitQualType canonSplit = getCanonicalType(elementType).split(); 1875 canon = getIncompleteArrayType(QualType(canonSplit.first, 0), 1876 ASM, elementTypeQuals); 1877 canon = getQualifiedType(canon, canonSplit.second); 1878 1879 // Get the new insert position for the node we care about. 1880 IncompleteArrayType *existing = 1881 IncompleteArrayTypes.FindNodeOrInsertPos(ID, insertPos); 1882 assert(!existing && "Shouldn't be in the map!"); (void) existing; 1883 } 1884 1885 IncompleteArrayType *newType = new (*this, TypeAlignment) 1886 IncompleteArrayType(elementType, canon, ASM, elementTypeQuals); 1887 1888 IncompleteArrayTypes.InsertNode(newType, insertPos); 1889 Types.push_back(newType); 1890 return QualType(newType, 0); 1891} 1892 1893/// getVectorType - Return the unique reference to a vector type of 1894/// the specified element type and size. VectorType must be a built-in type. 1895QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts, 1896 VectorType::VectorKind VecKind) const { 1897 assert(vecType->isBuiltinType()); 1898 1899 // Check if we've already instantiated a vector of this type. 1900 llvm::FoldingSetNodeID ID; 1901 VectorType::Profile(ID, vecType, NumElts, Type::Vector, VecKind); 1902 1903 void *InsertPos = 0; 1904 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1905 return QualType(VTP, 0); 1906 1907 // If the element type isn't canonical, this won't be a canonical type either, 1908 // so fill in the canonical type field. 1909 QualType Canonical; 1910 if (!vecType.isCanonical()) { 1911 Canonical = getVectorType(getCanonicalType(vecType), NumElts, VecKind); 1912 1913 // Get the new insert position for the node we care about. 1914 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1915 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1916 } 1917 VectorType *New = new (*this, TypeAlignment) 1918 VectorType(vecType, NumElts, Canonical, VecKind); 1919 VectorTypes.InsertNode(New, InsertPos); 1920 Types.push_back(New); 1921 return QualType(New, 0); 1922} 1923 1924/// getExtVectorType - Return the unique reference to an extended vector type of 1925/// the specified element type and size. VectorType must be a built-in type. 1926QualType 1927ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) const { 1928 assert(vecType->isBuiltinType() || vecType->isDependentType()); 1929 1930 // Check if we've already instantiated a vector of this type. 1931 llvm::FoldingSetNodeID ID; 1932 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector, 1933 VectorType::GenericVector); 1934 void *InsertPos = 0; 1935 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1936 return QualType(VTP, 0); 1937 1938 // If the element type isn't canonical, this won't be a canonical type either, 1939 // so fill in the canonical type field. 1940 QualType Canonical; 1941 if (!vecType.isCanonical()) { 1942 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts); 1943 1944 // Get the new insert position for the node we care about. 1945 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1946 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1947 } 1948 ExtVectorType *New = new (*this, TypeAlignment) 1949 ExtVectorType(vecType, NumElts, Canonical); 1950 VectorTypes.InsertNode(New, InsertPos); 1951 Types.push_back(New); 1952 return QualType(New, 0); 1953} 1954 1955QualType 1956ASTContext::getDependentSizedExtVectorType(QualType vecType, 1957 Expr *SizeExpr, 1958 SourceLocation AttrLoc) const { 1959 llvm::FoldingSetNodeID ID; 1960 DependentSizedExtVectorType::Profile(ID, *this, getCanonicalType(vecType), 1961 SizeExpr); 1962 1963 void *InsertPos = 0; 1964 DependentSizedExtVectorType *Canon 1965 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1966 DependentSizedExtVectorType *New; 1967 if (Canon) { 1968 // We already have a canonical version of this array type; use it as 1969 // the canonical type for a newly-built type. 1970 New = new (*this, TypeAlignment) 1971 DependentSizedExtVectorType(*this, vecType, QualType(Canon, 0), 1972 SizeExpr, AttrLoc); 1973 } else { 1974 QualType CanonVecTy = getCanonicalType(vecType); 1975 if (CanonVecTy == vecType) { 1976 New = new (*this, TypeAlignment) 1977 DependentSizedExtVectorType(*this, vecType, QualType(), SizeExpr, 1978 AttrLoc); 1979 1980 DependentSizedExtVectorType *CanonCheck 1981 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1982 assert(!CanonCheck && "Dependent-sized ext_vector canonical type broken"); 1983 (void)CanonCheck; 1984 DependentSizedExtVectorTypes.InsertNode(New, InsertPos); 1985 } else { 1986 QualType Canon = getDependentSizedExtVectorType(CanonVecTy, SizeExpr, 1987 SourceLocation()); 1988 New = new (*this, TypeAlignment) 1989 DependentSizedExtVectorType(*this, vecType, Canon, SizeExpr, AttrLoc); 1990 } 1991 } 1992 1993 Types.push_back(New); 1994 return QualType(New, 0); 1995} 1996 1997/// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 1998/// 1999QualType 2000ASTContext::getFunctionNoProtoType(QualType ResultTy, 2001 const FunctionType::ExtInfo &Info) const { 2002 const CallingConv DefaultCC = Info.getCC(); 2003 const CallingConv CallConv = (LangOpts.MRTD && DefaultCC == CC_Default) ? 2004 CC_X86StdCall : DefaultCC; 2005 // Unique functions, to guarantee there is only one function of a particular 2006 // structure. 2007 llvm::FoldingSetNodeID ID; 2008 FunctionNoProtoType::Profile(ID, ResultTy, Info); 2009 2010 void *InsertPos = 0; 2011 if (FunctionNoProtoType *FT = 2012 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 2013 return QualType(FT, 0); 2014 2015 QualType Canonical; 2016 if (!ResultTy.isCanonical() || 2017 getCanonicalCallConv(CallConv) != CallConv) { 2018 Canonical = 2019 getFunctionNoProtoType(getCanonicalType(ResultTy), 2020 Info.withCallingConv(getCanonicalCallConv(CallConv))); 2021 2022 // Get the new insert position for the node we care about. 2023 FunctionNoProtoType *NewIP = 2024 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 2025 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 2026 } 2027 2028 FunctionProtoType::ExtInfo newInfo = Info.withCallingConv(CallConv); 2029 FunctionNoProtoType *New = new (*this, TypeAlignment) 2030 FunctionNoProtoType(ResultTy, Canonical, newInfo); 2031 Types.push_back(New); 2032 FunctionNoProtoTypes.InsertNode(New, InsertPos); 2033 return QualType(New, 0); 2034} 2035 2036/// getFunctionType - Return a normal function type with a typed argument 2037/// list. isVariadic indicates whether the argument list includes '...'. 2038QualType 2039ASTContext::getFunctionType(QualType ResultTy, 2040 const QualType *ArgArray, unsigned NumArgs, 2041 const FunctionProtoType::ExtProtoInfo &EPI) const { 2042 // Unique functions, to guarantee there is only one function of a particular 2043 // structure. 2044 llvm::FoldingSetNodeID ID; 2045 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, EPI, *this); 2046 2047 void *InsertPos = 0; 2048 if (FunctionProtoType *FTP = 2049 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 2050 return QualType(FTP, 0); 2051 2052 // Determine whether the type being created is already canonical or not. 2053 bool isCanonical= EPI.ExceptionSpecType == EST_None && ResultTy.isCanonical(); 2054 for (unsigned i = 0; i != NumArgs && isCanonical; ++i) 2055 if (!ArgArray[i].isCanonicalAsParam()) 2056 isCanonical = false; 2057 2058 const CallingConv DefaultCC = EPI.ExtInfo.getCC(); 2059 const CallingConv CallConv = (LangOpts.MRTD && DefaultCC == CC_Default) ? 2060 CC_X86StdCall : DefaultCC; 2061 2062 // If this type isn't canonical, get the canonical version of it. 2063 // The exception spec is not part of the canonical type. 2064 QualType Canonical; 2065 if (!isCanonical || getCanonicalCallConv(CallConv) != CallConv) { 2066 SmallVector<QualType, 16> CanonicalArgs; 2067 CanonicalArgs.reserve(NumArgs); 2068 for (unsigned i = 0; i != NumArgs; ++i) 2069 CanonicalArgs.push_back(getCanonicalParamType(ArgArray[i])); 2070 2071 FunctionProtoType::ExtProtoInfo CanonicalEPI = EPI; 2072 CanonicalEPI.ExceptionSpecType = EST_None; 2073 CanonicalEPI.NumExceptions = 0; 2074 CanonicalEPI.ExtInfo 2075 = CanonicalEPI.ExtInfo.withCallingConv(getCanonicalCallConv(CallConv)); 2076 2077 Canonical = getFunctionType(getCanonicalType(ResultTy), 2078 CanonicalArgs.data(), NumArgs, 2079 CanonicalEPI); 2080 2081 // Get the new insert position for the node we care about. 2082 FunctionProtoType *NewIP = 2083 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 2084 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 2085 } 2086 2087 // FunctionProtoType objects are allocated with extra bytes after 2088 // them for three variable size arrays at the end: 2089 // - parameter types 2090 // - exception types 2091 // - consumed-arguments flags 2092 // Instead of the exception types, there could be a noexcept 2093 // expression. 2094 size_t Size = sizeof(FunctionProtoType) + 2095 NumArgs * sizeof(QualType); 2096 if (EPI.ExceptionSpecType == EST_Dynamic) 2097 Size += EPI.NumExceptions * sizeof(QualType); 2098 else if (EPI.ExceptionSpecType == EST_ComputedNoexcept) { 2099 Size += sizeof(Expr*); 2100 } 2101 if (EPI.ConsumedArguments) 2102 Size += NumArgs * sizeof(bool); 2103 2104 FunctionProtoType *FTP = (FunctionProtoType*) Allocate(Size, TypeAlignment); 2105 FunctionProtoType::ExtProtoInfo newEPI = EPI; 2106 newEPI.ExtInfo = EPI.ExtInfo.withCallingConv(CallConv); 2107 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, Canonical, newEPI); 2108 Types.push_back(FTP); 2109 FunctionProtoTypes.InsertNode(FTP, InsertPos); 2110 return QualType(FTP, 0); 2111} 2112 2113#ifndef NDEBUG 2114static bool NeedsInjectedClassNameType(const RecordDecl *D) { 2115 if (!isa<CXXRecordDecl>(D)) return false; 2116 const CXXRecordDecl *RD = cast<CXXRecordDecl>(D); 2117 if (isa<ClassTemplatePartialSpecializationDecl>(RD)) 2118 return true; 2119 if (RD->getDescribedClassTemplate() && 2120 !isa<ClassTemplateSpecializationDecl>(RD)) 2121 return true; 2122 return false; 2123} 2124#endif 2125 2126/// getInjectedClassNameType - Return the unique reference to the 2127/// injected class name type for the specified templated declaration. 2128QualType ASTContext::getInjectedClassNameType(CXXRecordDecl *Decl, 2129 QualType TST) const { 2130 assert(NeedsInjectedClassNameType(Decl)); 2131 if (Decl->TypeForDecl) { 2132 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 2133 } else if (CXXRecordDecl *PrevDecl = Decl->getPreviousDeclaration()) { 2134 assert(PrevDecl->TypeForDecl && "previous declaration has no type"); 2135 Decl->TypeForDecl = PrevDecl->TypeForDecl; 2136 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 2137 } else { 2138 Type *newType = 2139 new (*this, TypeAlignment) InjectedClassNameType(Decl, TST); 2140 Decl->TypeForDecl = newType; 2141 Types.push_back(newType); 2142 } 2143 return QualType(Decl->TypeForDecl, 0); 2144} 2145 2146/// getTypeDeclType - Return the unique reference to the type for the 2147/// specified type declaration. 2148QualType ASTContext::getTypeDeclTypeSlow(const TypeDecl *Decl) const { 2149 assert(Decl && "Passed null for Decl param"); 2150 assert(!Decl->TypeForDecl && "TypeForDecl present in slow case"); 2151 2152 if (const TypedefNameDecl *Typedef = dyn_cast<TypedefNameDecl>(Decl)) 2153 return getTypedefType(Typedef); 2154 2155 assert(!isa<TemplateTypeParmDecl>(Decl) && 2156 "Template type parameter types are always available."); 2157 2158 if (const RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) { 2159 assert(!Record->getPreviousDeclaration() && 2160 "struct/union has previous declaration"); 2161 assert(!NeedsInjectedClassNameType(Record)); 2162 return getRecordType(Record); 2163 } else if (const EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) { 2164 assert(!Enum->getPreviousDeclaration() && 2165 "enum has previous declaration"); 2166 return getEnumType(Enum); 2167 } else if (const UnresolvedUsingTypenameDecl *Using = 2168 dyn_cast<UnresolvedUsingTypenameDecl>(Decl)) { 2169 Type *newType = new (*this, TypeAlignment) UnresolvedUsingType(Using); 2170 Decl->TypeForDecl = newType; 2171 Types.push_back(newType); 2172 } else 2173 llvm_unreachable("TypeDecl without a type?"); 2174 2175 return QualType(Decl->TypeForDecl, 0); 2176} 2177 2178/// getTypedefType - Return the unique reference to the type for the 2179/// specified typedef name decl. 2180QualType 2181ASTContext::getTypedefType(const TypedefNameDecl *Decl, 2182 QualType Canonical) const { 2183 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2184 2185 if (Canonical.isNull()) 2186 Canonical = getCanonicalType(Decl->getUnderlyingType()); 2187 TypedefType *newType = new(*this, TypeAlignment) 2188 TypedefType(Type::Typedef, Decl, Canonical); 2189 Decl->TypeForDecl = newType; 2190 Types.push_back(newType); 2191 return QualType(newType, 0); 2192} 2193 2194QualType ASTContext::getRecordType(const RecordDecl *Decl) const { 2195 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2196 2197 if (const RecordDecl *PrevDecl = Decl->getPreviousDeclaration()) 2198 if (PrevDecl->TypeForDecl) 2199 return QualType(Decl->TypeForDecl = PrevDecl->TypeForDecl, 0); 2200 2201 RecordType *newType = new (*this, TypeAlignment) RecordType(Decl); 2202 Decl->TypeForDecl = newType; 2203 Types.push_back(newType); 2204 return QualType(newType, 0); 2205} 2206 2207QualType ASTContext::getEnumType(const EnumDecl *Decl) const { 2208 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2209 2210 if (const EnumDecl *PrevDecl = Decl->getPreviousDeclaration()) 2211 if (PrevDecl->TypeForDecl) 2212 return QualType(Decl->TypeForDecl = PrevDecl->TypeForDecl, 0); 2213 2214 EnumType *newType = new (*this, TypeAlignment) EnumType(Decl); 2215 Decl->TypeForDecl = newType; 2216 Types.push_back(newType); 2217 return QualType(newType, 0); 2218} 2219 2220QualType ASTContext::getAttributedType(AttributedType::Kind attrKind, 2221 QualType modifiedType, 2222 QualType equivalentType) { 2223 llvm::FoldingSetNodeID id; 2224 AttributedType::Profile(id, attrKind, modifiedType, equivalentType); 2225 2226 void *insertPos = 0; 2227 AttributedType *type = AttributedTypes.FindNodeOrInsertPos(id, insertPos); 2228 if (type) return QualType(type, 0); 2229 2230 QualType canon = getCanonicalType(equivalentType); 2231 type = new (*this, TypeAlignment) 2232 AttributedType(canon, attrKind, modifiedType, equivalentType); 2233 2234 Types.push_back(type); 2235 AttributedTypes.InsertNode(type, insertPos); 2236 2237 return QualType(type, 0); 2238} 2239 2240 2241/// \brief Retrieve a substitution-result type. 2242QualType 2243ASTContext::getSubstTemplateTypeParmType(const TemplateTypeParmType *Parm, 2244 QualType Replacement) const { 2245 assert(Replacement.isCanonical() 2246 && "replacement types must always be canonical"); 2247 2248 llvm::FoldingSetNodeID ID; 2249 SubstTemplateTypeParmType::Profile(ID, Parm, Replacement); 2250 void *InsertPos = 0; 2251 SubstTemplateTypeParmType *SubstParm 2252 = SubstTemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2253 2254 if (!SubstParm) { 2255 SubstParm = new (*this, TypeAlignment) 2256 SubstTemplateTypeParmType(Parm, Replacement); 2257 Types.push_back(SubstParm); 2258 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 2259 } 2260 2261 return QualType(SubstParm, 0); 2262} 2263 2264/// \brief Retrieve a 2265QualType ASTContext::getSubstTemplateTypeParmPackType( 2266 const TemplateTypeParmType *Parm, 2267 const TemplateArgument &ArgPack) { 2268#ifndef NDEBUG 2269 for (TemplateArgument::pack_iterator P = ArgPack.pack_begin(), 2270 PEnd = ArgPack.pack_end(); 2271 P != PEnd; ++P) { 2272 assert(P->getKind() == TemplateArgument::Type &&"Pack contains a non-type"); 2273 assert(P->getAsType().isCanonical() && "Pack contains non-canonical type"); 2274 } 2275#endif 2276 2277 llvm::FoldingSetNodeID ID; 2278 SubstTemplateTypeParmPackType::Profile(ID, Parm, ArgPack); 2279 void *InsertPos = 0; 2280 if (SubstTemplateTypeParmPackType *SubstParm 2281 = SubstTemplateTypeParmPackTypes.FindNodeOrInsertPos(ID, InsertPos)) 2282 return QualType(SubstParm, 0); 2283 2284 QualType Canon; 2285 if (!Parm->isCanonicalUnqualified()) { 2286 Canon = getCanonicalType(QualType(Parm, 0)); 2287 Canon = getSubstTemplateTypeParmPackType(cast<TemplateTypeParmType>(Canon), 2288 ArgPack); 2289 SubstTemplateTypeParmPackTypes.FindNodeOrInsertPos(ID, InsertPos); 2290 } 2291 2292 SubstTemplateTypeParmPackType *SubstParm 2293 = new (*this, TypeAlignment) SubstTemplateTypeParmPackType(Parm, Canon, 2294 ArgPack); 2295 Types.push_back(SubstParm); 2296 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 2297 return QualType(SubstParm, 0); 2298} 2299 2300/// \brief Retrieve the template type parameter type for a template 2301/// parameter or parameter pack with the given depth, index, and (optionally) 2302/// name. 2303QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index, 2304 bool ParameterPack, 2305 TemplateTypeParmDecl *TTPDecl) const { 2306 llvm::FoldingSetNodeID ID; 2307 TemplateTypeParmType::Profile(ID, Depth, Index, ParameterPack, TTPDecl); 2308 void *InsertPos = 0; 2309 TemplateTypeParmType *TypeParm 2310 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2311 2312 if (TypeParm) 2313 return QualType(TypeParm, 0); 2314 2315 if (TTPDecl) { 2316 QualType Canon = getTemplateTypeParmType(Depth, Index, ParameterPack); 2317 TypeParm = new (*this, TypeAlignment) TemplateTypeParmType(TTPDecl, Canon); 2318 2319 TemplateTypeParmType *TypeCheck 2320 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2321 assert(!TypeCheck && "Template type parameter canonical type broken"); 2322 (void)TypeCheck; 2323 } else 2324 TypeParm = new (*this, TypeAlignment) 2325 TemplateTypeParmType(Depth, Index, ParameterPack); 2326 2327 Types.push_back(TypeParm); 2328 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos); 2329 2330 return QualType(TypeParm, 0); 2331} 2332 2333TypeSourceInfo * 2334ASTContext::getTemplateSpecializationTypeInfo(TemplateName Name, 2335 SourceLocation NameLoc, 2336 const TemplateArgumentListInfo &Args, 2337 QualType Underlying) const { 2338 assert(!Name.getAsDependentTemplateName() && 2339 "No dependent template names here!"); 2340 QualType TST = getTemplateSpecializationType(Name, Args, Underlying); 2341 2342 TypeSourceInfo *DI = CreateTypeSourceInfo(TST); 2343 TemplateSpecializationTypeLoc TL 2344 = cast<TemplateSpecializationTypeLoc>(DI->getTypeLoc()); 2345 TL.setTemplateNameLoc(NameLoc); 2346 TL.setLAngleLoc(Args.getLAngleLoc()); 2347 TL.setRAngleLoc(Args.getRAngleLoc()); 2348 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 2349 TL.setArgLocInfo(i, Args[i].getLocInfo()); 2350 return DI; 2351} 2352 2353QualType 2354ASTContext::getTemplateSpecializationType(TemplateName Template, 2355 const TemplateArgumentListInfo &Args, 2356 QualType Underlying) const { 2357 assert(!Template.getAsDependentTemplateName() && 2358 "No dependent template names here!"); 2359 2360 unsigned NumArgs = Args.size(); 2361 2362 SmallVector<TemplateArgument, 4> ArgVec; 2363 ArgVec.reserve(NumArgs); 2364 for (unsigned i = 0; i != NumArgs; ++i) 2365 ArgVec.push_back(Args[i].getArgument()); 2366 2367 return getTemplateSpecializationType(Template, ArgVec.data(), NumArgs, 2368 Underlying); 2369} 2370 2371QualType 2372ASTContext::getTemplateSpecializationType(TemplateName Template, 2373 const TemplateArgument *Args, 2374 unsigned NumArgs, 2375 QualType Underlying) const { 2376 assert(!Template.getAsDependentTemplateName() && 2377 "No dependent template names here!"); 2378 // Look through qualified template names. 2379 if (QualifiedTemplateName *QTN = Template.getAsQualifiedTemplateName()) 2380 Template = TemplateName(QTN->getTemplateDecl()); 2381 2382 bool isTypeAlias = 2383 Template.getAsTemplateDecl() && 2384 isa<TypeAliasTemplateDecl>(Template.getAsTemplateDecl()); 2385 2386 QualType CanonType; 2387 if (!Underlying.isNull()) 2388 CanonType = getCanonicalType(Underlying); 2389 else { 2390 assert(!isTypeAlias && 2391 "Underlying type for template alias must be computed by caller"); 2392 CanonType = getCanonicalTemplateSpecializationType(Template, Args, 2393 NumArgs); 2394 } 2395 2396 // Allocate the (non-canonical) template specialization type, but don't 2397 // try to unique it: these types typically have location information that 2398 // we don't unique and don't want to lose. 2399 void *Mem = Allocate(sizeof(TemplateSpecializationType) + 2400 sizeof(TemplateArgument) * NumArgs + 2401 (isTypeAlias ? sizeof(QualType) : 0), 2402 TypeAlignment); 2403 TemplateSpecializationType *Spec 2404 = new (Mem) TemplateSpecializationType(Template, 2405 Args, NumArgs, 2406 CanonType, 2407 isTypeAlias ? Underlying : QualType()); 2408 2409 Types.push_back(Spec); 2410 return QualType(Spec, 0); 2411} 2412 2413QualType 2414ASTContext::getCanonicalTemplateSpecializationType(TemplateName Template, 2415 const TemplateArgument *Args, 2416 unsigned NumArgs) const { 2417 assert(!Template.getAsDependentTemplateName() && 2418 "No dependent template names here!"); 2419 assert((!Template.getAsTemplateDecl() || 2420 !isa<TypeAliasTemplateDecl>(Template.getAsTemplateDecl())) && 2421 "Underlying type for template alias must be computed by caller"); 2422 2423 // Look through qualified template names. 2424 if (QualifiedTemplateName *QTN = Template.getAsQualifiedTemplateName()) 2425 Template = TemplateName(QTN->getTemplateDecl()); 2426 2427 // Build the canonical template specialization type. 2428 TemplateName CanonTemplate = getCanonicalTemplateName(Template); 2429 SmallVector<TemplateArgument, 4> CanonArgs; 2430 CanonArgs.reserve(NumArgs); 2431 for (unsigned I = 0; I != NumArgs; ++I) 2432 CanonArgs.push_back(getCanonicalTemplateArgument(Args[I])); 2433 2434 // Determine whether this canonical template specialization type already 2435 // exists. 2436 llvm::FoldingSetNodeID ID; 2437 TemplateSpecializationType::Profile(ID, CanonTemplate, 2438 CanonArgs.data(), NumArgs, *this); 2439 2440 void *InsertPos = 0; 2441 TemplateSpecializationType *Spec 2442 = TemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2443 2444 if (!Spec) { 2445 // Allocate a new canonical template specialization type. 2446 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 2447 sizeof(TemplateArgument) * NumArgs), 2448 TypeAlignment); 2449 Spec = new (Mem) TemplateSpecializationType(CanonTemplate, 2450 CanonArgs.data(), NumArgs, 2451 QualType(), QualType()); 2452 Types.push_back(Spec); 2453 TemplateSpecializationTypes.InsertNode(Spec, InsertPos); 2454 } 2455 2456 assert(Spec->isDependentType() && 2457 "Non-dependent template-id type must have a canonical type"); 2458 return QualType(Spec, 0); 2459} 2460 2461QualType 2462ASTContext::getElaboratedType(ElaboratedTypeKeyword Keyword, 2463 NestedNameSpecifier *NNS, 2464 QualType NamedType) const { 2465 llvm::FoldingSetNodeID ID; 2466 ElaboratedType::Profile(ID, Keyword, NNS, NamedType); 2467 2468 void *InsertPos = 0; 2469 ElaboratedType *T = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2470 if (T) 2471 return QualType(T, 0); 2472 2473 QualType Canon = NamedType; 2474 if (!Canon.isCanonical()) { 2475 Canon = getCanonicalType(NamedType); 2476 ElaboratedType *CheckT = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2477 assert(!CheckT && "Elaborated canonical type broken"); 2478 (void)CheckT; 2479 } 2480 2481 T = new (*this) ElaboratedType(Keyword, NNS, NamedType, Canon); 2482 Types.push_back(T); 2483 ElaboratedTypes.InsertNode(T, InsertPos); 2484 return QualType(T, 0); 2485} 2486 2487QualType 2488ASTContext::getParenType(QualType InnerType) const { 2489 llvm::FoldingSetNodeID ID; 2490 ParenType::Profile(ID, InnerType); 2491 2492 void *InsertPos = 0; 2493 ParenType *T = ParenTypes.FindNodeOrInsertPos(ID, InsertPos); 2494 if (T) 2495 return QualType(T, 0); 2496 2497 QualType Canon = InnerType; 2498 if (!Canon.isCanonical()) { 2499 Canon = getCanonicalType(InnerType); 2500 ParenType *CheckT = ParenTypes.FindNodeOrInsertPos(ID, InsertPos); 2501 assert(!CheckT && "Paren canonical type broken"); 2502 (void)CheckT; 2503 } 2504 2505 T = new (*this) ParenType(InnerType, Canon); 2506 Types.push_back(T); 2507 ParenTypes.InsertNode(T, InsertPos); 2508 return QualType(T, 0); 2509} 2510 2511QualType ASTContext::getDependentNameType(ElaboratedTypeKeyword Keyword, 2512 NestedNameSpecifier *NNS, 2513 const IdentifierInfo *Name, 2514 QualType Canon) const { 2515 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 2516 2517 if (Canon.isNull()) { 2518 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2519 ElaboratedTypeKeyword CanonKeyword = Keyword; 2520 if (Keyword == ETK_None) 2521 CanonKeyword = ETK_Typename; 2522 2523 if (CanonNNS != NNS || CanonKeyword != Keyword) 2524 Canon = getDependentNameType(CanonKeyword, CanonNNS, Name); 2525 } 2526 2527 llvm::FoldingSetNodeID ID; 2528 DependentNameType::Profile(ID, Keyword, NNS, Name); 2529 2530 void *InsertPos = 0; 2531 DependentNameType *T 2532 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 2533 if (T) 2534 return QualType(T, 0); 2535 2536 T = new (*this) DependentNameType(Keyword, NNS, Name, Canon); 2537 Types.push_back(T); 2538 DependentNameTypes.InsertNode(T, InsertPos); 2539 return QualType(T, 0); 2540} 2541 2542QualType 2543ASTContext::getDependentTemplateSpecializationType( 2544 ElaboratedTypeKeyword Keyword, 2545 NestedNameSpecifier *NNS, 2546 const IdentifierInfo *Name, 2547 const TemplateArgumentListInfo &Args) const { 2548 // TODO: avoid this copy 2549 SmallVector<TemplateArgument, 16> ArgCopy; 2550 for (unsigned I = 0, E = Args.size(); I != E; ++I) 2551 ArgCopy.push_back(Args[I].getArgument()); 2552 return getDependentTemplateSpecializationType(Keyword, NNS, Name, 2553 ArgCopy.size(), 2554 ArgCopy.data()); 2555} 2556 2557QualType 2558ASTContext::getDependentTemplateSpecializationType( 2559 ElaboratedTypeKeyword Keyword, 2560 NestedNameSpecifier *NNS, 2561 const IdentifierInfo *Name, 2562 unsigned NumArgs, 2563 const TemplateArgument *Args) const { 2564 assert((!NNS || NNS->isDependent()) && 2565 "nested-name-specifier must be dependent"); 2566 2567 llvm::FoldingSetNodeID ID; 2568 DependentTemplateSpecializationType::Profile(ID, *this, Keyword, NNS, 2569 Name, NumArgs, Args); 2570 2571 void *InsertPos = 0; 2572 DependentTemplateSpecializationType *T 2573 = DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2574 if (T) 2575 return QualType(T, 0); 2576 2577 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2578 2579 ElaboratedTypeKeyword CanonKeyword = Keyword; 2580 if (Keyword == ETK_None) CanonKeyword = ETK_Typename; 2581 2582 bool AnyNonCanonArgs = false; 2583 SmallVector<TemplateArgument, 16> CanonArgs(NumArgs); 2584 for (unsigned I = 0; I != NumArgs; ++I) { 2585 CanonArgs[I] = getCanonicalTemplateArgument(Args[I]); 2586 if (!CanonArgs[I].structurallyEquals(Args[I])) 2587 AnyNonCanonArgs = true; 2588 } 2589 2590 QualType Canon; 2591 if (AnyNonCanonArgs || CanonNNS != NNS || CanonKeyword != Keyword) { 2592 Canon = getDependentTemplateSpecializationType(CanonKeyword, CanonNNS, 2593 Name, NumArgs, 2594 CanonArgs.data()); 2595 2596 // Find the insert position again. 2597 DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2598 } 2599 2600 void *Mem = Allocate((sizeof(DependentTemplateSpecializationType) + 2601 sizeof(TemplateArgument) * NumArgs), 2602 TypeAlignment); 2603 T = new (Mem) DependentTemplateSpecializationType(Keyword, NNS, 2604 Name, NumArgs, Args, Canon); 2605 Types.push_back(T); 2606 DependentTemplateSpecializationTypes.InsertNode(T, InsertPos); 2607 return QualType(T, 0); 2608} 2609 2610QualType ASTContext::getPackExpansionType(QualType Pattern, 2611 llvm::Optional<unsigned> NumExpansions) { 2612 llvm::FoldingSetNodeID ID; 2613 PackExpansionType::Profile(ID, Pattern, NumExpansions); 2614 2615 assert(Pattern->containsUnexpandedParameterPack() && 2616 "Pack expansions must expand one or more parameter packs"); 2617 void *InsertPos = 0; 2618 PackExpansionType *T 2619 = PackExpansionTypes.FindNodeOrInsertPos(ID, InsertPos); 2620 if (T) 2621 return QualType(T, 0); 2622 2623 QualType Canon; 2624 if (!Pattern.isCanonical()) { 2625 Canon = getPackExpansionType(getCanonicalType(Pattern), NumExpansions); 2626 2627 // Find the insert position again. 2628 PackExpansionTypes.FindNodeOrInsertPos(ID, InsertPos); 2629 } 2630 2631 T = new (*this) PackExpansionType(Pattern, Canon, NumExpansions); 2632 Types.push_back(T); 2633 PackExpansionTypes.InsertNode(T, InsertPos); 2634 return QualType(T, 0); 2635} 2636 2637/// CmpProtocolNames - Comparison predicate for sorting protocols 2638/// alphabetically. 2639static bool CmpProtocolNames(const ObjCProtocolDecl *LHS, 2640 const ObjCProtocolDecl *RHS) { 2641 return LHS->getDeclName() < RHS->getDeclName(); 2642} 2643 2644static bool areSortedAndUniqued(ObjCProtocolDecl * const *Protocols, 2645 unsigned NumProtocols) { 2646 if (NumProtocols == 0) return true; 2647 2648 for (unsigned i = 1; i != NumProtocols; ++i) 2649 if (!CmpProtocolNames(Protocols[i-1], Protocols[i])) 2650 return false; 2651 return true; 2652} 2653 2654static void SortAndUniqueProtocols(ObjCProtocolDecl **Protocols, 2655 unsigned &NumProtocols) { 2656 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols; 2657 2658 // Sort protocols, keyed by name. 2659 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames); 2660 2661 // Remove duplicates. 2662 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd); 2663 NumProtocols = ProtocolsEnd-Protocols; 2664} 2665 2666QualType ASTContext::getObjCObjectType(QualType BaseType, 2667 ObjCProtocolDecl * const *Protocols, 2668 unsigned NumProtocols) const { 2669 // If the base type is an interface and there aren't any protocols 2670 // to add, then the interface type will do just fine. 2671 if (!NumProtocols && isa<ObjCInterfaceType>(BaseType)) 2672 return BaseType; 2673 2674 // Look in the folding set for an existing type. 2675 llvm::FoldingSetNodeID ID; 2676 ObjCObjectTypeImpl::Profile(ID, BaseType, Protocols, NumProtocols); 2677 void *InsertPos = 0; 2678 if (ObjCObjectType *QT = ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos)) 2679 return QualType(QT, 0); 2680 2681 // Build the canonical type, which has the canonical base type and 2682 // a sorted-and-uniqued list of protocols. 2683 QualType Canonical; 2684 bool ProtocolsSorted = areSortedAndUniqued(Protocols, NumProtocols); 2685 if (!ProtocolsSorted || !BaseType.isCanonical()) { 2686 if (!ProtocolsSorted) { 2687 SmallVector<ObjCProtocolDecl*, 8> Sorted(Protocols, 2688 Protocols + NumProtocols); 2689 unsigned UniqueCount = NumProtocols; 2690 2691 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2692 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2693 &Sorted[0], UniqueCount); 2694 } else { 2695 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2696 Protocols, NumProtocols); 2697 } 2698 2699 // Regenerate InsertPos. 2700 ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos); 2701 } 2702 2703 unsigned Size = sizeof(ObjCObjectTypeImpl); 2704 Size += NumProtocols * sizeof(ObjCProtocolDecl *); 2705 void *Mem = Allocate(Size, TypeAlignment); 2706 ObjCObjectTypeImpl *T = 2707 new (Mem) ObjCObjectTypeImpl(Canonical, BaseType, Protocols, NumProtocols); 2708 2709 Types.push_back(T); 2710 ObjCObjectTypes.InsertNode(T, InsertPos); 2711 return QualType(T, 0); 2712} 2713 2714/// getObjCObjectPointerType - Return a ObjCObjectPointerType type for 2715/// the given object type. 2716QualType ASTContext::getObjCObjectPointerType(QualType ObjectT) const { 2717 llvm::FoldingSetNodeID ID; 2718 ObjCObjectPointerType::Profile(ID, ObjectT); 2719 2720 void *InsertPos = 0; 2721 if (ObjCObjectPointerType *QT = 2722 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 2723 return QualType(QT, 0); 2724 2725 // Find the canonical object type. 2726 QualType Canonical; 2727 if (!ObjectT.isCanonical()) { 2728 Canonical = getObjCObjectPointerType(getCanonicalType(ObjectT)); 2729 2730 // Regenerate InsertPos. 2731 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 2732 } 2733 2734 // No match. 2735 void *Mem = Allocate(sizeof(ObjCObjectPointerType), TypeAlignment); 2736 ObjCObjectPointerType *QType = 2737 new (Mem) ObjCObjectPointerType(Canonical, ObjectT); 2738 2739 Types.push_back(QType); 2740 ObjCObjectPointerTypes.InsertNode(QType, InsertPos); 2741 return QualType(QType, 0); 2742} 2743 2744/// getObjCInterfaceType - Return the unique reference to the type for the 2745/// specified ObjC interface decl. The list of protocols is optional. 2746QualType ASTContext::getObjCInterfaceType(const ObjCInterfaceDecl *Decl) const { 2747 if (Decl->TypeForDecl) 2748 return QualType(Decl->TypeForDecl, 0); 2749 2750 // FIXME: redeclarations? 2751 void *Mem = Allocate(sizeof(ObjCInterfaceType), TypeAlignment); 2752 ObjCInterfaceType *T = new (Mem) ObjCInterfaceType(Decl); 2753 Decl->TypeForDecl = T; 2754 Types.push_back(T); 2755 return QualType(T, 0); 2756} 2757 2758/// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique 2759/// TypeOfExprType AST's (since expression's are never shared). For example, 2760/// multiple declarations that refer to "typeof(x)" all contain different 2761/// DeclRefExpr's. This doesn't effect the type checker, since it operates 2762/// on canonical type's (which are always unique). 2763QualType ASTContext::getTypeOfExprType(Expr *tofExpr) const { 2764 TypeOfExprType *toe; 2765 if (tofExpr->isTypeDependent()) { 2766 llvm::FoldingSetNodeID ID; 2767 DependentTypeOfExprType::Profile(ID, *this, tofExpr); 2768 2769 void *InsertPos = 0; 2770 DependentTypeOfExprType *Canon 2771 = DependentTypeOfExprTypes.FindNodeOrInsertPos(ID, InsertPos); 2772 if (Canon) { 2773 // We already have a "canonical" version of an identical, dependent 2774 // typeof(expr) type. Use that as our canonical type. 2775 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, 2776 QualType((TypeOfExprType*)Canon, 0)); 2777 } else { 2778 // Build a new, canonical typeof(expr) type. 2779 Canon 2780 = new (*this, TypeAlignment) DependentTypeOfExprType(*this, tofExpr); 2781 DependentTypeOfExprTypes.InsertNode(Canon, InsertPos); 2782 toe = Canon; 2783 } 2784 } else { 2785 QualType Canonical = getCanonicalType(tofExpr->getType()); 2786 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, Canonical); 2787 } 2788 Types.push_back(toe); 2789 return QualType(toe, 0); 2790} 2791 2792/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique 2793/// TypeOfType AST's. The only motivation to unique these nodes would be 2794/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be 2795/// an issue. This doesn't effect the type checker, since it operates 2796/// on canonical type's (which are always unique). 2797QualType ASTContext::getTypeOfType(QualType tofType) const { 2798 QualType Canonical = getCanonicalType(tofType); 2799 TypeOfType *tot = new (*this, TypeAlignment) TypeOfType(tofType, Canonical); 2800 Types.push_back(tot); 2801 return QualType(tot, 0); 2802} 2803 2804/// getDecltypeForExpr - Given an expr, will return the decltype for that 2805/// expression, according to the rules in C++0x [dcl.type.simple]p4 2806static QualType getDecltypeForExpr(const Expr *e, const ASTContext &Context) { 2807 if (e->isTypeDependent()) 2808 return Context.DependentTy; 2809 2810 // If e is an id expression or a class member access, decltype(e) is defined 2811 // as the type of the entity named by e. 2812 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(e)) { 2813 if (const ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl())) 2814 return VD->getType(); 2815 } 2816 if (const MemberExpr *ME = dyn_cast<MemberExpr>(e)) { 2817 if (const FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) 2818 return FD->getType(); 2819 } 2820 // If e is a function call or an invocation of an overloaded operator, 2821 // (parentheses around e are ignored), decltype(e) is defined as the 2822 // return type of that function. 2823 if (const CallExpr *CE = dyn_cast<CallExpr>(e->IgnoreParens())) 2824 return CE->getCallReturnType(); 2825 2826 QualType T = e->getType(); 2827 2828 // Otherwise, where T is the type of e, if e is an lvalue, decltype(e) is 2829 // defined as T&, otherwise decltype(e) is defined as T. 2830 if (e->isLValue()) 2831 T = Context.getLValueReferenceType(T); 2832 2833 return T; 2834} 2835 2836/// getDecltypeType - Unlike many "get<Type>" functions, we don't unique 2837/// DecltypeType AST's. The only motivation to unique these nodes would be 2838/// memory savings. Since decltype(t) is fairly uncommon, space shouldn't be 2839/// an issue. This doesn't effect the type checker, since it operates 2840/// on canonical type's (which are always unique). 2841QualType ASTContext::getDecltypeType(Expr *e) const { 2842 DecltypeType *dt; 2843 2844 // C++0x [temp.type]p2: 2845 // If an expression e involves a template parameter, decltype(e) denotes a 2846 // unique dependent type. Two such decltype-specifiers refer to the same 2847 // type only if their expressions are equivalent (14.5.6.1). 2848 if (e->isInstantiationDependent()) { 2849 llvm::FoldingSetNodeID ID; 2850 DependentDecltypeType::Profile(ID, *this, e); 2851 2852 void *InsertPos = 0; 2853 DependentDecltypeType *Canon 2854 = DependentDecltypeTypes.FindNodeOrInsertPos(ID, InsertPos); 2855 if (Canon) { 2856 // We already have a "canonical" version of an equivalent, dependent 2857 // decltype type. Use that as our canonical type. 2858 dt = new (*this, TypeAlignment) DecltypeType(e, DependentTy, 2859 QualType((DecltypeType*)Canon, 0)); 2860 } else { 2861 // Build a new, canonical typeof(expr) type. 2862 Canon = new (*this, TypeAlignment) DependentDecltypeType(*this, e); 2863 DependentDecltypeTypes.InsertNode(Canon, InsertPos); 2864 dt = Canon; 2865 } 2866 } else { 2867 QualType T = getDecltypeForExpr(e, *this); 2868 dt = new (*this, TypeAlignment) DecltypeType(e, T, getCanonicalType(T)); 2869 } 2870 Types.push_back(dt); 2871 return QualType(dt, 0); 2872} 2873 2874/// getUnaryTransformationType - We don't unique these, since the memory 2875/// savings are minimal and these are rare. 2876QualType ASTContext::getUnaryTransformType(QualType BaseType, 2877 QualType UnderlyingType, 2878 UnaryTransformType::UTTKind Kind) 2879 const { 2880 UnaryTransformType *Ty = 2881 new (*this, TypeAlignment) UnaryTransformType (BaseType, UnderlyingType, 2882 Kind, 2883 UnderlyingType->isDependentType() ? 2884 QualType() : UnderlyingType); 2885 Types.push_back(Ty); 2886 return QualType(Ty, 0); 2887} 2888 2889/// getAutoType - We only unique auto types after they've been deduced. 2890QualType ASTContext::getAutoType(QualType DeducedType) const { 2891 void *InsertPos = 0; 2892 if (!DeducedType.isNull()) { 2893 // Look in the folding set for an existing type. 2894 llvm::FoldingSetNodeID ID; 2895 AutoType::Profile(ID, DeducedType); 2896 if (AutoType *AT = AutoTypes.FindNodeOrInsertPos(ID, InsertPos)) 2897 return QualType(AT, 0); 2898 } 2899 2900 AutoType *AT = new (*this, TypeAlignment) AutoType(DeducedType); 2901 Types.push_back(AT); 2902 if (InsertPos) 2903 AutoTypes.InsertNode(AT, InsertPos); 2904 return QualType(AT, 0); 2905} 2906 2907/// getAutoDeductType - Get type pattern for deducing against 'auto'. 2908QualType ASTContext::getAutoDeductType() const { 2909 if (AutoDeductTy.isNull()) 2910 AutoDeductTy = getAutoType(QualType()); 2911 assert(!AutoDeductTy.isNull() && "can't build 'auto' pattern"); 2912 return AutoDeductTy; 2913} 2914 2915/// getAutoRRefDeductType - Get type pattern for deducing against 'auto &&'. 2916QualType ASTContext::getAutoRRefDeductType() const { 2917 if (AutoRRefDeductTy.isNull()) 2918 AutoRRefDeductTy = getRValueReferenceType(getAutoDeductType()); 2919 assert(!AutoRRefDeductTy.isNull() && "can't build 'auto &&' pattern"); 2920 return AutoRRefDeductTy; 2921} 2922 2923/// getTagDeclType - Return the unique reference to the type for the 2924/// specified TagDecl (struct/union/class/enum) decl. 2925QualType ASTContext::getTagDeclType(const TagDecl *Decl) const { 2926 assert (Decl); 2927 // FIXME: What is the design on getTagDeclType when it requires casting 2928 // away const? mutable? 2929 return getTypeDeclType(const_cast<TagDecl*>(Decl)); 2930} 2931 2932/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result 2933/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and 2934/// needs to agree with the definition in <stddef.h>. 2935CanQualType ASTContext::getSizeType() const { 2936 return getFromTargetType(Target->getSizeType()); 2937} 2938 2939/// getSignedWCharType - Return the type of "signed wchar_t". 2940/// Used when in C++, as a GCC extension. 2941QualType ASTContext::getSignedWCharType() const { 2942 // FIXME: derive from "Target" ? 2943 return WCharTy; 2944} 2945 2946/// getUnsignedWCharType - Return the type of "unsigned wchar_t". 2947/// Used when in C++, as a GCC extension. 2948QualType ASTContext::getUnsignedWCharType() const { 2949 // FIXME: derive from "Target" ? 2950 return UnsignedIntTy; 2951} 2952 2953/// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 2954/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 2955QualType ASTContext::getPointerDiffType() const { 2956 return getFromTargetType(Target->getPtrDiffType(0)); 2957} 2958 2959//===----------------------------------------------------------------------===// 2960// Type Operators 2961//===----------------------------------------------------------------------===// 2962 2963CanQualType ASTContext::getCanonicalParamType(QualType T) const { 2964 // Push qualifiers into arrays, and then discard any remaining 2965 // qualifiers. 2966 T = getCanonicalType(T); 2967 T = getVariableArrayDecayedType(T); 2968 const Type *Ty = T.getTypePtr(); 2969 QualType Result; 2970 if (isa<ArrayType>(Ty)) { 2971 Result = getArrayDecayedType(QualType(Ty,0)); 2972 } else if (isa<FunctionType>(Ty)) { 2973 Result = getPointerType(QualType(Ty, 0)); 2974 } else { 2975 Result = QualType(Ty, 0); 2976 } 2977 2978 return CanQualType::CreateUnsafe(Result); 2979} 2980 2981QualType ASTContext::getUnqualifiedArrayType(QualType type, 2982 Qualifiers &quals) { 2983 SplitQualType splitType = type.getSplitUnqualifiedType(); 2984 2985 // FIXME: getSplitUnqualifiedType() actually walks all the way to 2986 // the unqualified desugared type and then drops it on the floor. 2987 // We then have to strip that sugar back off with 2988 // getUnqualifiedDesugaredType(), which is silly. 2989 const ArrayType *AT = 2990 dyn_cast<ArrayType>(splitType.first->getUnqualifiedDesugaredType()); 2991 2992 // If we don't have an array, just use the results in splitType. 2993 if (!AT) { 2994 quals = splitType.second; 2995 return QualType(splitType.first, 0); 2996 } 2997 2998 // Otherwise, recurse on the array's element type. 2999 QualType elementType = AT->getElementType(); 3000 QualType unqualElementType = getUnqualifiedArrayType(elementType, quals); 3001 3002 // If that didn't change the element type, AT has no qualifiers, so we 3003 // can just use the results in splitType. 3004 if (elementType == unqualElementType) { 3005 assert(quals.empty()); // from the recursive call 3006 quals = splitType.second; 3007 return QualType(splitType.first, 0); 3008 } 3009 3010 // Otherwise, add in the qualifiers from the outermost type, then 3011 // build the type back up. 3012 quals.addConsistentQualifiers(splitType.second); 3013 3014 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) { 3015 return getConstantArrayType(unqualElementType, CAT->getSize(), 3016 CAT->getSizeModifier(), 0); 3017 } 3018 3019 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) { 3020 return getIncompleteArrayType(unqualElementType, IAT->getSizeModifier(), 0); 3021 } 3022 3023 if (const VariableArrayType *VAT = dyn_cast<VariableArrayType>(AT)) { 3024 return getVariableArrayType(unqualElementType, 3025 VAT->getSizeExpr(), 3026 VAT->getSizeModifier(), 3027 VAT->getIndexTypeCVRQualifiers(), 3028 VAT->getBracketsRange()); 3029 } 3030 3031 const DependentSizedArrayType *DSAT = cast<DependentSizedArrayType>(AT); 3032 return getDependentSizedArrayType(unqualElementType, DSAT->getSizeExpr(), 3033 DSAT->getSizeModifier(), 0, 3034 SourceRange()); 3035} 3036 3037/// UnwrapSimilarPointerTypes - If T1 and T2 are pointer types that 3038/// may be similar (C++ 4.4), replaces T1 and T2 with the type that 3039/// they point to and return true. If T1 and T2 aren't pointer types 3040/// or pointer-to-member types, or if they are not similar at this 3041/// level, returns false and leaves T1 and T2 unchanged. Top-level 3042/// qualifiers on T1 and T2 are ignored. This function will typically 3043/// be called in a loop that successively "unwraps" pointer and 3044/// pointer-to-member types to compare them at each level. 3045bool ASTContext::UnwrapSimilarPointerTypes(QualType &T1, QualType &T2) { 3046 const PointerType *T1PtrType = T1->getAs<PointerType>(), 3047 *T2PtrType = T2->getAs<PointerType>(); 3048 if (T1PtrType && T2PtrType) { 3049 T1 = T1PtrType->getPointeeType(); 3050 T2 = T2PtrType->getPointeeType(); 3051 return true; 3052 } 3053 3054 const MemberPointerType *T1MPType = T1->getAs<MemberPointerType>(), 3055 *T2MPType = T2->getAs<MemberPointerType>(); 3056 if (T1MPType && T2MPType && 3057 hasSameUnqualifiedType(QualType(T1MPType->getClass(), 0), 3058 QualType(T2MPType->getClass(), 0))) { 3059 T1 = T1MPType->getPointeeType(); 3060 T2 = T2MPType->getPointeeType(); 3061 return true; 3062 } 3063 3064 if (getLangOptions().ObjC1) { 3065 const ObjCObjectPointerType *T1OPType = T1->getAs<ObjCObjectPointerType>(), 3066 *T2OPType = T2->getAs<ObjCObjectPointerType>(); 3067 if (T1OPType && T2OPType) { 3068 T1 = T1OPType->getPointeeType(); 3069 T2 = T2OPType->getPointeeType(); 3070 return true; 3071 } 3072 } 3073 3074 // FIXME: Block pointers, too? 3075 3076 return false; 3077} 3078 3079DeclarationNameInfo 3080ASTContext::getNameForTemplate(TemplateName Name, 3081 SourceLocation NameLoc) const { 3082 switch (Name.getKind()) { 3083 case TemplateName::QualifiedTemplate: 3084 case TemplateName::Template: 3085 // DNInfo work in progress: CHECKME: what about DNLoc? 3086 return DeclarationNameInfo(Name.getAsTemplateDecl()->getDeclName(), 3087 NameLoc); 3088 3089 case TemplateName::OverloadedTemplate: { 3090 OverloadedTemplateStorage *Storage = Name.getAsOverloadedTemplate(); 3091 // DNInfo work in progress: CHECKME: what about DNLoc? 3092 return DeclarationNameInfo((*Storage->begin())->getDeclName(), NameLoc); 3093 } 3094 3095 case TemplateName::DependentTemplate: { 3096 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 3097 DeclarationName DName; 3098 if (DTN->isIdentifier()) { 3099 DName = DeclarationNames.getIdentifier(DTN->getIdentifier()); 3100 return DeclarationNameInfo(DName, NameLoc); 3101 } else { 3102 DName = DeclarationNames.getCXXOperatorName(DTN->getOperator()); 3103 // DNInfo work in progress: FIXME: source locations? 3104 DeclarationNameLoc DNLoc; 3105 DNLoc.CXXOperatorName.BeginOpNameLoc = SourceLocation().getRawEncoding(); 3106 DNLoc.CXXOperatorName.EndOpNameLoc = SourceLocation().getRawEncoding(); 3107 return DeclarationNameInfo(DName, NameLoc, DNLoc); 3108 } 3109 } 3110 3111 case TemplateName::SubstTemplateTemplateParm: { 3112 SubstTemplateTemplateParmStorage *subst 3113 = Name.getAsSubstTemplateTemplateParm(); 3114 return DeclarationNameInfo(subst->getParameter()->getDeclName(), 3115 NameLoc); 3116 } 3117 3118 case TemplateName::SubstTemplateTemplateParmPack: { 3119 SubstTemplateTemplateParmPackStorage *subst 3120 = Name.getAsSubstTemplateTemplateParmPack(); 3121 return DeclarationNameInfo(subst->getParameterPack()->getDeclName(), 3122 NameLoc); 3123 } 3124 } 3125 3126 llvm_unreachable("bad template name kind!"); 3127} 3128 3129TemplateName ASTContext::getCanonicalTemplateName(TemplateName Name) const { 3130 switch (Name.getKind()) { 3131 case TemplateName::QualifiedTemplate: 3132 case TemplateName::Template: { 3133 TemplateDecl *Template = Name.getAsTemplateDecl(); 3134 if (TemplateTemplateParmDecl *TTP 3135 = dyn_cast<TemplateTemplateParmDecl>(Template)) 3136 Template = getCanonicalTemplateTemplateParmDecl(TTP); 3137 3138 // The canonical template name is the canonical template declaration. 3139 return TemplateName(cast<TemplateDecl>(Template->getCanonicalDecl())); 3140 } 3141 3142 case TemplateName::OverloadedTemplate: 3143 llvm_unreachable("cannot canonicalize overloaded template"); 3144 3145 case TemplateName::DependentTemplate: { 3146 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 3147 assert(DTN && "Non-dependent template names must refer to template decls."); 3148 return DTN->CanonicalTemplateName; 3149 } 3150 3151 case TemplateName::SubstTemplateTemplateParm: { 3152 SubstTemplateTemplateParmStorage *subst 3153 = Name.getAsSubstTemplateTemplateParm(); 3154 return getCanonicalTemplateName(subst->getReplacement()); 3155 } 3156 3157 case TemplateName::SubstTemplateTemplateParmPack: { 3158 SubstTemplateTemplateParmPackStorage *subst 3159 = Name.getAsSubstTemplateTemplateParmPack(); 3160 TemplateTemplateParmDecl *canonParameter 3161 = getCanonicalTemplateTemplateParmDecl(subst->getParameterPack()); 3162 TemplateArgument canonArgPack 3163 = getCanonicalTemplateArgument(subst->getArgumentPack()); 3164 return getSubstTemplateTemplateParmPack(canonParameter, canonArgPack); 3165 } 3166 } 3167 3168 llvm_unreachable("bad template name!"); 3169} 3170 3171bool ASTContext::hasSameTemplateName(TemplateName X, TemplateName Y) { 3172 X = getCanonicalTemplateName(X); 3173 Y = getCanonicalTemplateName(Y); 3174 return X.getAsVoidPointer() == Y.getAsVoidPointer(); 3175} 3176 3177TemplateArgument 3178ASTContext::getCanonicalTemplateArgument(const TemplateArgument &Arg) const { 3179 switch (Arg.getKind()) { 3180 case TemplateArgument::Null: 3181 return Arg; 3182 3183 case TemplateArgument::Expression: 3184 return Arg; 3185 3186 case TemplateArgument::Declaration: 3187 return TemplateArgument(Arg.getAsDecl()->getCanonicalDecl()); 3188 3189 case TemplateArgument::Template: 3190 return TemplateArgument(getCanonicalTemplateName(Arg.getAsTemplate())); 3191 3192 case TemplateArgument::TemplateExpansion: 3193 return TemplateArgument(getCanonicalTemplateName( 3194 Arg.getAsTemplateOrTemplatePattern()), 3195 Arg.getNumTemplateExpansions()); 3196 3197 case TemplateArgument::Integral: 3198 return TemplateArgument(*Arg.getAsIntegral(), 3199 getCanonicalType(Arg.getIntegralType())); 3200 3201 case TemplateArgument::Type: 3202 return TemplateArgument(getCanonicalType(Arg.getAsType())); 3203 3204 case TemplateArgument::Pack: { 3205 if (Arg.pack_size() == 0) 3206 return Arg; 3207 3208 TemplateArgument *CanonArgs 3209 = new (*this) TemplateArgument[Arg.pack_size()]; 3210 unsigned Idx = 0; 3211 for (TemplateArgument::pack_iterator A = Arg.pack_begin(), 3212 AEnd = Arg.pack_end(); 3213 A != AEnd; (void)++A, ++Idx) 3214 CanonArgs[Idx] = getCanonicalTemplateArgument(*A); 3215 3216 return TemplateArgument(CanonArgs, Arg.pack_size()); 3217 } 3218 } 3219 3220 // Silence GCC warning 3221 llvm_unreachable("Unhandled template argument kind"); 3222} 3223 3224NestedNameSpecifier * 3225ASTContext::getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) const { 3226 if (!NNS) 3227 return 0; 3228 3229 switch (NNS->getKind()) { 3230 case NestedNameSpecifier::Identifier: 3231 // Canonicalize the prefix but keep the identifier the same. 3232 return NestedNameSpecifier::Create(*this, 3233 getCanonicalNestedNameSpecifier(NNS->getPrefix()), 3234 NNS->getAsIdentifier()); 3235 3236 case NestedNameSpecifier::Namespace: 3237 // A namespace is canonical; build a nested-name-specifier with 3238 // this namespace and no prefix. 3239 return NestedNameSpecifier::Create(*this, 0, 3240 NNS->getAsNamespace()->getOriginalNamespace()); 3241 3242 case NestedNameSpecifier::NamespaceAlias: 3243 // A namespace is canonical; build a nested-name-specifier with 3244 // this namespace and no prefix. 3245 return NestedNameSpecifier::Create(*this, 0, 3246 NNS->getAsNamespaceAlias()->getNamespace() 3247 ->getOriginalNamespace()); 3248 3249 case NestedNameSpecifier::TypeSpec: 3250 case NestedNameSpecifier::TypeSpecWithTemplate: { 3251 QualType T = getCanonicalType(QualType(NNS->getAsType(), 0)); 3252 3253 // If we have some kind of dependent-named type (e.g., "typename T::type"), 3254 // break it apart into its prefix and identifier, then reconsititute those 3255 // as the canonical nested-name-specifier. This is required to canonicalize 3256 // a dependent nested-name-specifier involving typedefs of dependent-name 3257 // types, e.g., 3258 // typedef typename T::type T1; 3259 // typedef typename T1::type T2; 3260 if (const DependentNameType *DNT = T->getAs<DependentNameType>()) { 3261 NestedNameSpecifier *Prefix 3262 = getCanonicalNestedNameSpecifier(DNT->getQualifier()); 3263 return NestedNameSpecifier::Create(*this, Prefix, 3264 const_cast<IdentifierInfo *>(DNT->getIdentifier())); 3265 } 3266 3267 // Do the same thing as above, but with dependent-named specializations. 3268 if (const DependentTemplateSpecializationType *DTST 3269 = T->getAs<DependentTemplateSpecializationType>()) { 3270 NestedNameSpecifier *Prefix 3271 = getCanonicalNestedNameSpecifier(DTST->getQualifier()); 3272 3273 T = getDependentTemplateSpecializationType(DTST->getKeyword(), 3274 Prefix, DTST->getIdentifier(), 3275 DTST->getNumArgs(), 3276 DTST->getArgs()); 3277 T = getCanonicalType(T); 3278 } 3279 3280 return NestedNameSpecifier::Create(*this, 0, false, 3281 const_cast<Type*>(T.getTypePtr())); 3282 } 3283 3284 case NestedNameSpecifier::Global: 3285 // The global specifier is canonical and unique. 3286 return NNS; 3287 } 3288 3289 // Required to silence a GCC warning 3290 return 0; 3291} 3292 3293 3294const ArrayType *ASTContext::getAsArrayType(QualType T) const { 3295 // Handle the non-qualified case efficiently. 3296 if (!T.hasLocalQualifiers()) { 3297 // Handle the common positive case fast. 3298 if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 3299 return AT; 3300 } 3301 3302 // Handle the common negative case fast. 3303 if (!isa<ArrayType>(T.getCanonicalType())) 3304 return 0; 3305 3306 // Apply any qualifiers from the array type to the element type. This 3307 // implements C99 6.7.3p8: "If the specification of an array type includes 3308 // any type qualifiers, the element type is so qualified, not the array type." 3309 3310 // If we get here, we either have type qualifiers on the type, or we have 3311 // sugar such as a typedef in the way. If we have type qualifiers on the type 3312 // we must propagate them down into the element type. 3313 3314 SplitQualType split = T.getSplitDesugaredType(); 3315 Qualifiers qs = split.second; 3316 3317 // If we have a simple case, just return now. 3318 const ArrayType *ATy = dyn_cast<ArrayType>(split.first); 3319 if (ATy == 0 || qs.empty()) 3320 return ATy; 3321 3322 // Otherwise, we have an array and we have qualifiers on it. Push the 3323 // qualifiers into the array element type and return a new array type. 3324 QualType NewEltTy = getQualifiedType(ATy->getElementType(), qs); 3325 3326 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy)) 3327 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(), 3328 CAT->getSizeModifier(), 3329 CAT->getIndexTypeCVRQualifiers())); 3330 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy)) 3331 return cast<ArrayType>(getIncompleteArrayType(NewEltTy, 3332 IAT->getSizeModifier(), 3333 IAT->getIndexTypeCVRQualifiers())); 3334 3335 if (const DependentSizedArrayType *DSAT 3336 = dyn_cast<DependentSizedArrayType>(ATy)) 3337 return cast<ArrayType>( 3338 getDependentSizedArrayType(NewEltTy, 3339 DSAT->getSizeExpr(), 3340 DSAT->getSizeModifier(), 3341 DSAT->getIndexTypeCVRQualifiers(), 3342 DSAT->getBracketsRange())); 3343 3344 const VariableArrayType *VAT = cast<VariableArrayType>(ATy); 3345 return cast<ArrayType>(getVariableArrayType(NewEltTy, 3346 VAT->getSizeExpr(), 3347 VAT->getSizeModifier(), 3348 VAT->getIndexTypeCVRQualifiers(), 3349 VAT->getBracketsRange())); 3350} 3351 3352QualType ASTContext::getAdjustedParameterType(QualType T) { 3353 // C99 6.7.5.3p7: 3354 // A declaration of a parameter as "array of type" shall be 3355 // adjusted to "qualified pointer to type", where the type 3356 // qualifiers (if any) are those specified within the [ and ] of 3357 // the array type derivation. 3358 if (T->isArrayType()) 3359 return getArrayDecayedType(T); 3360 3361 // C99 6.7.5.3p8: 3362 // A declaration of a parameter as "function returning type" 3363 // shall be adjusted to "pointer to function returning type", as 3364 // in 6.3.2.1. 3365 if (T->isFunctionType()) 3366 return getPointerType(T); 3367 3368 return T; 3369} 3370 3371QualType ASTContext::getSignatureParameterType(QualType T) { 3372 T = getVariableArrayDecayedType(T); 3373 T = getAdjustedParameterType(T); 3374 return T.getUnqualifiedType(); 3375} 3376 3377/// getArrayDecayedType - Return the properly qualified result of decaying the 3378/// specified array type to a pointer. This operation is non-trivial when 3379/// handling typedefs etc. The canonical type of "T" must be an array type, 3380/// this returns a pointer to a properly qualified element of the array. 3381/// 3382/// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 3383QualType ASTContext::getArrayDecayedType(QualType Ty) const { 3384 // Get the element type with 'getAsArrayType' so that we don't lose any 3385 // typedefs in the element type of the array. This also handles propagation 3386 // of type qualifiers from the array type into the element type if present 3387 // (C99 6.7.3p8). 3388 const ArrayType *PrettyArrayType = getAsArrayType(Ty); 3389 assert(PrettyArrayType && "Not an array type!"); 3390 3391 QualType PtrTy = getPointerType(PrettyArrayType->getElementType()); 3392 3393 // int x[restrict 4] -> int *restrict 3394 return getQualifiedType(PtrTy, PrettyArrayType->getIndexTypeQualifiers()); 3395} 3396 3397QualType ASTContext::getBaseElementType(const ArrayType *array) const { 3398 return getBaseElementType(array->getElementType()); 3399} 3400 3401QualType ASTContext::getBaseElementType(QualType type) const { 3402 Qualifiers qs; 3403 while (true) { 3404 SplitQualType split = type.getSplitDesugaredType(); 3405 const ArrayType *array = split.first->getAsArrayTypeUnsafe(); 3406 if (!array) break; 3407 3408 type = array->getElementType(); 3409 qs.addConsistentQualifiers(split.second); 3410 } 3411 3412 return getQualifiedType(type, qs); 3413} 3414 3415/// getConstantArrayElementCount - Returns number of constant array elements. 3416uint64_t 3417ASTContext::getConstantArrayElementCount(const ConstantArrayType *CA) const { 3418 uint64_t ElementCount = 1; 3419 do { 3420 ElementCount *= CA->getSize().getZExtValue(); 3421 CA = dyn_cast<ConstantArrayType>(CA->getElementType()); 3422 } while (CA); 3423 return ElementCount; 3424} 3425 3426/// getFloatingRank - Return a relative rank for floating point types. 3427/// This routine will assert if passed a built-in type that isn't a float. 3428static FloatingRank getFloatingRank(QualType T) { 3429 if (const ComplexType *CT = T->getAs<ComplexType>()) 3430 return getFloatingRank(CT->getElementType()); 3431 3432 assert(T->getAs<BuiltinType>() && "getFloatingRank(): not a floating type"); 3433 switch (T->getAs<BuiltinType>()->getKind()) { 3434 default: llvm_unreachable("getFloatingRank(): not a floating type"); 3435 case BuiltinType::Float: return FloatRank; 3436 case BuiltinType::Double: return DoubleRank; 3437 case BuiltinType::LongDouble: return LongDoubleRank; 3438 } 3439} 3440 3441/// getFloatingTypeOfSizeWithinDomain - Returns a real floating 3442/// point or a complex type (based on typeDomain/typeSize). 3443/// 'typeDomain' is a real floating point or complex type. 3444/// 'typeSize' is a real floating point or complex type. 3445QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size, 3446 QualType Domain) const { 3447 FloatingRank EltRank = getFloatingRank(Size); 3448 if (Domain->isComplexType()) { 3449 switch (EltRank) { 3450 default: llvm_unreachable("getFloatingRank(): illegal value for rank"); 3451 case FloatRank: return FloatComplexTy; 3452 case DoubleRank: return DoubleComplexTy; 3453 case LongDoubleRank: return LongDoubleComplexTy; 3454 } 3455 } 3456 3457 assert(Domain->isRealFloatingType() && "Unknown domain!"); 3458 switch (EltRank) { 3459 default: llvm_unreachable("getFloatingRank(): illegal value for rank"); 3460 case FloatRank: return FloatTy; 3461 case DoubleRank: return DoubleTy; 3462 case LongDoubleRank: return LongDoubleTy; 3463 } 3464} 3465 3466/// getFloatingTypeOrder - Compare the rank of the two specified floating 3467/// point types, ignoring the domain of the type (i.e. 'double' == 3468/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 3469/// LHS < RHS, return -1. 3470int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) const { 3471 FloatingRank LHSR = getFloatingRank(LHS); 3472 FloatingRank RHSR = getFloatingRank(RHS); 3473 3474 if (LHSR == RHSR) 3475 return 0; 3476 if (LHSR > RHSR) 3477 return 1; 3478 return -1; 3479} 3480 3481/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This 3482/// routine will assert if passed a built-in type that isn't an integer or enum, 3483/// or if it is not canonicalized. 3484unsigned ASTContext::getIntegerRank(const Type *T) const { 3485 assert(T->isCanonicalUnqualified() && "T should be canonicalized"); 3486 if (const EnumType* ET = dyn_cast<EnumType>(T)) 3487 T = ET->getDecl()->getPromotionType().getTypePtr(); 3488 3489 if (T->isSpecificBuiltinType(BuiltinType::WChar_S) || 3490 T->isSpecificBuiltinType(BuiltinType::WChar_U)) 3491 T = getFromTargetType(Target->getWCharType()).getTypePtr(); 3492 3493 if (T->isSpecificBuiltinType(BuiltinType::Char16)) 3494 T = getFromTargetType(Target->getChar16Type()).getTypePtr(); 3495 3496 if (T->isSpecificBuiltinType(BuiltinType::Char32)) 3497 T = getFromTargetType(Target->getChar32Type()).getTypePtr(); 3498 3499 switch (cast<BuiltinType>(T)->getKind()) { 3500 default: llvm_unreachable("getIntegerRank(): not a built-in integer"); 3501 case BuiltinType::Bool: 3502 return 1 + (getIntWidth(BoolTy) << 3); 3503 case BuiltinType::Char_S: 3504 case BuiltinType::Char_U: 3505 case BuiltinType::SChar: 3506 case BuiltinType::UChar: 3507 return 2 + (getIntWidth(CharTy) << 3); 3508 case BuiltinType::Short: 3509 case BuiltinType::UShort: 3510 return 3 + (getIntWidth(ShortTy) << 3); 3511 case BuiltinType::Int: 3512 case BuiltinType::UInt: 3513 return 4 + (getIntWidth(IntTy) << 3); 3514 case BuiltinType::Long: 3515 case BuiltinType::ULong: 3516 return 5 + (getIntWidth(LongTy) << 3); 3517 case BuiltinType::LongLong: 3518 case BuiltinType::ULongLong: 3519 return 6 + (getIntWidth(LongLongTy) << 3); 3520 case BuiltinType::Int128: 3521 case BuiltinType::UInt128: 3522 return 7 + (getIntWidth(Int128Ty) << 3); 3523 } 3524} 3525 3526/// \brief Whether this is a promotable bitfield reference according 3527/// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 3528/// 3529/// \returns the type this bit-field will promote to, or NULL if no 3530/// promotion occurs. 3531QualType ASTContext::isPromotableBitField(Expr *E) const { 3532 if (E->isTypeDependent() || E->isValueDependent()) 3533 return QualType(); 3534 3535 FieldDecl *Field = E->getBitField(); 3536 if (!Field) 3537 return QualType(); 3538 3539 QualType FT = Field->getType(); 3540 3541 llvm::APSInt BitWidthAP = Field->getBitWidth()->EvaluateAsInt(*this); 3542 uint64_t BitWidth = BitWidthAP.getZExtValue(); 3543 uint64_t IntSize = getTypeSize(IntTy); 3544 // GCC extension compatibility: if the bit-field size is less than or equal 3545 // to the size of int, it gets promoted no matter what its type is. 3546 // For instance, unsigned long bf : 4 gets promoted to signed int. 3547 if (BitWidth < IntSize) 3548 return IntTy; 3549 3550 if (BitWidth == IntSize) 3551 return FT->isSignedIntegerType() ? IntTy : UnsignedIntTy; 3552 3553 // Types bigger than int are not subject to promotions, and therefore act 3554 // like the base type. 3555 // FIXME: This doesn't quite match what gcc does, but what gcc does here 3556 // is ridiculous. 3557 return QualType(); 3558} 3559 3560/// getPromotedIntegerType - Returns the type that Promotable will 3561/// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 3562/// integer type. 3563QualType ASTContext::getPromotedIntegerType(QualType Promotable) const { 3564 assert(!Promotable.isNull()); 3565 assert(Promotable->isPromotableIntegerType()); 3566 if (const EnumType *ET = Promotable->getAs<EnumType>()) 3567 return ET->getDecl()->getPromotionType(); 3568 if (Promotable->isSignedIntegerType()) 3569 return IntTy; 3570 uint64_t PromotableSize = getTypeSize(Promotable); 3571 uint64_t IntSize = getTypeSize(IntTy); 3572 assert(Promotable->isUnsignedIntegerType() && PromotableSize <= IntSize); 3573 return (PromotableSize != IntSize) ? IntTy : UnsignedIntTy; 3574} 3575 3576/// \brief Recurses in pointer/array types until it finds an objc retainable 3577/// type and returns its ownership. 3578Qualifiers::ObjCLifetime ASTContext::getInnerObjCOwnership(QualType T) const { 3579 while (!T.isNull()) { 3580 if (T.getObjCLifetime() != Qualifiers::OCL_None) 3581 return T.getObjCLifetime(); 3582 if (T->isArrayType()) 3583 T = getBaseElementType(T); 3584 else if (const PointerType *PT = T->getAs<PointerType>()) 3585 T = PT->getPointeeType(); 3586 else if (const ReferenceType *RT = T->getAs<ReferenceType>()) 3587 T = RT->getPointeeType(); 3588 else 3589 break; 3590 } 3591 3592 return Qualifiers::OCL_None; 3593} 3594 3595/// getIntegerTypeOrder - Returns the highest ranked integer type: 3596/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 3597/// LHS < RHS, return -1. 3598int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) const { 3599 const Type *LHSC = getCanonicalType(LHS).getTypePtr(); 3600 const Type *RHSC = getCanonicalType(RHS).getTypePtr(); 3601 if (LHSC == RHSC) return 0; 3602 3603 bool LHSUnsigned = LHSC->isUnsignedIntegerType(); 3604 bool RHSUnsigned = RHSC->isUnsignedIntegerType(); 3605 3606 unsigned LHSRank = getIntegerRank(LHSC); 3607 unsigned RHSRank = getIntegerRank(RHSC); 3608 3609 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned. 3610 if (LHSRank == RHSRank) return 0; 3611 return LHSRank > RHSRank ? 1 : -1; 3612 } 3613 3614 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa. 3615 if (LHSUnsigned) { 3616 // If the unsigned [LHS] type is larger, return it. 3617 if (LHSRank >= RHSRank) 3618 return 1; 3619 3620 // If the signed type can represent all values of the unsigned type, it 3621 // wins. Because we are dealing with 2's complement and types that are 3622 // powers of two larger than each other, this is always safe. 3623 return -1; 3624 } 3625 3626 // If the unsigned [RHS] type is larger, return it. 3627 if (RHSRank >= LHSRank) 3628 return -1; 3629 3630 // If the signed type can represent all values of the unsigned type, it 3631 // wins. Because we are dealing with 2's complement and types that are 3632 // powers of two larger than each other, this is always safe. 3633 return 1; 3634} 3635 3636static RecordDecl * 3637CreateRecordDecl(const ASTContext &Ctx, RecordDecl::TagKind TK, 3638 DeclContext *DC, IdentifierInfo *Id) { 3639 SourceLocation Loc; 3640 if (Ctx.getLangOptions().CPlusPlus) 3641 return CXXRecordDecl::Create(Ctx, TK, DC, Loc, Loc, Id); 3642 else 3643 return RecordDecl::Create(Ctx, TK, DC, Loc, Loc, Id); 3644} 3645 3646// getCFConstantStringType - Return the type used for constant CFStrings. 3647QualType ASTContext::getCFConstantStringType() const { 3648 if (!CFConstantStringTypeDecl) { 3649 CFConstantStringTypeDecl = 3650 CreateRecordDecl(*this, TTK_Struct, TUDecl, 3651 &Idents.get("NSConstantString")); 3652 CFConstantStringTypeDecl->startDefinition(); 3653 3654 QualType FieldTypes[4]; 3655 3656 // const int *isa; 3657 FieldTypes[0] = getPointerType(IntTy.withConst()); 3658 // int flags; 3659 FieldTypes[1] = IntTy; 3660 // const char *str; 3661 FieldTypes[2] = getPointerType(CharTy.withConst()); 3662 // long length; 3663 FieldTypes[3] = LongTy; 3664 3665 // Create fields 3666 for (unsigned i = 0; i < 4; ++i) { 3667 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl, 3668 SourceLocation(), 3669 SourceLocation(), 0, 3670 FieldTypes[i], /*TInfo=*/0, 3671 /*BitWidth=*/0, 3672 /*Mutable=*/false, 3673 /*HasInit=*/false); 3674 Field->setAccess(AS_public); 3675 CFConstantStringTypeDecl->addDecl(Field); 3676 } 3677 3678 CFConstantStringTypeDecl->completeDefinition(); 3679 } 3680 3681 return getTagDeclType(CFConstantStringTypeDecl); 3682} 3683 3684void ASTContext::setCFConstantStringType(QualType T) { 3685 const RecordType *Rec = T->getAs<RecordType>(); 3686 assert(Rec && "Invalid CFConstantStringType"); 3687 CFConstantStringTypeDecl = Rec->getDecl(); 3688} 3689 3690QualType ASTContext::getBlockDescriptorType() const { 3691 if (BlockDescriptorType) 3692 return getTagDeclType(BlockDescriptorType); 3693 3694 RecordDecl *T; 3695 // FIXME: Needs the FlagAppleBlock bit. 3696 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, 3697 &Idents.get("__block_descriptor")); 3698 T->startDefinition(); 3699 3700 QualType FieldTypes[] = { 3701 UnsignedLongTy, 3702 UnsignedLongTy, 3703 }; 3704 3705 const char *FieldNames[] = { 3706 "reserved", 3707 "Size" 3708 }; 3709 3710 for (size_t i = 0; i < 2; ++i) { 3711 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3712 SourceLocation(), 3713 &Idents.get(FieldNames[i]), 3714 FieldTypes[i], /*TInfo=*/0, 3715 /*BitWidth=*/0, 3716 /*Mutable=*/false, 3717 /*HasInit=*/false); 3718 Field->setAccess(AS_public); 3719 T->addDecl(Field); 3720 } 3721 3722 T->completeDefinition(); 3723 3724 BlockDescriptorType = T; 3725 3726 return getTagDeclType(BlockDescriptorType); 3727} 3728 3729QualType ASTContext::getBlockDescriptorExtendedType() const { 3730 if (BlockDescriptorExtendedType) 3731 return getTagDeclType(BlockDescriptorExtendedType); 3732 3733 RecordDecl *T; 3734 // FIXME: Needs the FlagAppleBlock bit. 3735 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, 3736 &Idents.get("__block_descriptor_withcopydispose")); 3737 T->startDefinition(); 3738 3739 QualType FieldTypes[] = { 3740 UnsignedLongTy, 3741 UnsignedLongTy, 3742 getPointerType(VoidPtrTy), 3743 getPointerType(VoidPtrTy) 3744 }; 3745 3746 const char *FieldNames[] = { 3747 "reserved", 3748 "Size", 3749 "CopyFuncPtr", 3750 "DestroyFuncPtr" 3751 }; 3752 3753 for (size_t i = 0; i < 4; ++i) { 3754 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3755 SourceLocation(), 3756 &Idents.get(FieldNames[i]), 3757 FieldTypes[i], /*TInfo=*/0, 3758 /*BitWidth=*/0, 3759 /*Mutable=*/false, 3760 /*HasInit=*/false); 3761 Field->setAccess(AS_public); 3762 T->addDecl(Field); 3763 } 3764 3765 T->completeDefinition(); 3766 3767 BlockDescriptorExtendedType = T; 3768 3769 return getTagDeclType(BlockDescriptorExtendedType); 3770} 3771 3772bool ASTContext::BlockRequiresCopying(QualType Ty) const { 3773 if (Ty->isObjCRetainableType()) 3774 return true; 3775 if (getLangOptions().CPlusPlus) { 3776 if (const RecordType *RT = Ty->getAs<RecordType>()) { 3777 CXXRecordDecl *RD = cast<CXXRecordDecl>(RT->getDecl()); 3778 return RD->hasConstCopyConstructor(); 3779 3780 } 3781 } 3782 return false; 3783} 3784 3785QualType 3786ASTContext::BuildByRefType(StringRef DeclName, QualType Ty) const { 3787 // type = struct __Block_byref_1_X { 3788 // void *__isa; 3789 // struct __Block_byref_1_X *__forwarding; 3790 // unsigned int __flags; 3791 // unsigned int __size; 3792 // void *__copy_helper; // as needed 3793 // void *__destroy_help // as needed 3794 // int X; 3795 // } * 3796 3797 bool HasCopyAndDispose = BlockRequiresCopying(Ty); 3798 3799 // FIXME: Move up 3800 llvm::SmallString<36> Name; 3801 llvm::raw_svector_ostream(Name) << "__Block_byref_" << 3802 ++UniqueBlockByRefTypeID << '_' << DeclName; 3803 RecordDecl *T; 3804 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, &Idents.get(Name.str())); 3805 T->startDefinition(); 3806 QualType Int32Ty = IntTy; 3807 assert(getIntWidth(IntTy) == 32 && "non-32bit int not supported"); 3808 QualType FieldTypes[] = { 3809 getPointerType(VoidPtrTy), 3810 getPointerType(getTagDeclType(T)), 3811 Int32Ty, 3812 Int32Ty, 3813 getPointerType(VoidPtrTy), 3814 getPointerType(VoidPtrTy), 3815 Ty 3816 }; 3817 3818 StringRef FieldNames[] = { 3819 "__isa", 3820 "__forwarding", 3821 "__flags", 3822 "__size", 3823 "__copy_helper", 3824 "__destroy_helper", 3825 DeclName, 3826 }; 3827 3828 for (size_t i = 0; i < 7; ++i) { 3829 if (!HasCopyAndDispose && i >=4 && i <= 5) 3830 continue; 3831 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3832 SourceLocation(), 3833 &Idents.get(FieldNames[i]), 3834 FieldTypes[i], /*TInfo=*/0, 3835 /*BitWidth=*/0, /*Mutable=*/false, 3836 /*HasInit=*/false); 3837 Field->setAccess(AS_public); 3838 T->addDecl(Field); 3839 } 3840 3841 T->completeDefinition(); 3842 3843 return getPointerType(getTagDeclType(T)); 3844} 3845 3846TypedefDecl *ASTContext::getObjCInstanceTypeDecl() { 3847 if (!ObjCInstanceTypeDecl) 3848 ObjCInstanceTypeDecl = TypedefDecl::Create(*this, 3849 getTranslationUnitDecl(), 3850 SourceLocation(), 3851 SourceLocation(), 3852 &Idents.get("instancetype"), 3853 getTrivialTypeSourceInfo(getObjCIdType())); 3854 return ObjCInstanceTypeDecl; 3855} 3856 3857// This returns true if a type has been typedefed to BOOL: 3858// typedef <type> BOOL; 3859static bool isTypeTypedefedAsBOOL(QualType T) { 3860 if (const TypedefType *TT = dyn_cast<TypedefType>(T)) 3861 if (IdentifierInfo *II = TT->getDecl()->getIdentifier()) 3862 return II->isStr("BOOL"); 3863 3864 return false; 3865} 3866 3867/// getObjCEncodingTypeSize returns size of type for objective-c encoding 3868/// purpose. 3869CharUnits ASTContext::getObjCEncodingTypeSize(QualType type) const { 3870 if (!type->isIncompleteArrayType() && type->isIncompleteType()) 3871 return CharUnits::Zero(); 3872 3873 CharUnits sz = getTypeSizeInChars(type); 3874 3875 // Make all integer and enum types at least as large as an int 3876 if (sz.isPositive() && type->isIntegralOrEnumerationType()) 3877 sz = std::max(sz, getTypeSizeInChars(IntTy)); 3878 // Treat arrays as pointers, since that's how they're passed in. 3879 else if (type->isArrayType()) 3880 sz = getTypeSizeInChars(VoidPtrTy); 3881 return sz; 3882} 3883 3884static inline 3885std::string charUnitsToString(const CharUnits &CU) { 3886 return llvm::itostr(CU.getQuantity()); 3887} 3888 3889/// getObjCEncodingForBlock - Return the encoded type for this block 3890/// declaration. 3891std::string ASTContext::getObjCEncodingForBlock(const BlockExpr *Expr) const { 3892 std::string S; 3893 3894 const BlockDecl *Decl = Expr->getBlockDecl(); 3895 QualType BlockTy = 3896 Expr->getType()->getAs<BlockPointerType>()->getPointeeType(); 3897 // Encode result type. 3898 getObjCEncodingForType(BlockTy->getAs<FunctionType>()->getResultType(), S); 3899 // Compute size of all parameters. 3900 // Start with computing size of a pointer in number of bytes. 3901 // FIXME: There might(should) be a better way of doing this computation! 3902 SourceLocation Loc; 3903 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3904 CharUnits ParmOffset = PtrSize; 3905 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), 3906 E = Decl->param_end(); PI != E; ++PI) { 3907 QualType PType = (*PI)->getType(); 3908 CharUnits sz = getObjCEncodingTypeSize(PType); 3909 assert (sz.isPositive() && "BlockExpr - Incomplete param type"); 3910 ParmOffset += sz; 3911 } 3912 // Size of the argument frame 3913 S += charUnitsToString(ParmOffset); 3914 // Block pointer and offset. 3915 S += "@?0"; 3916 3917 // Argument types. 3918 ParmOffset = PtrSize; 3919 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), E = 3920 Decl->param_end(); PI != E; ++PI) { 3921 ParmVarDecl *PVDecl = *PI; 3922 QualType PType = PVDecl->getOriginalType(); 3923 if (const ArrayType *AT = 3924 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3925 // Use array's original type only if it has known number of 3926 // elements. 3927 if (!isa<ConstantArrayType>(AT)) 3928 PType = PVDecl->getType(); 3929 } else if (PType->isFunctionType()) 3930 PType = PVDecl->getType(); 3931 getObjCEncodingForType(PType, S); 3932 S += charUnitsToString(ParmOffset); 3933 ParmOffset += getObjCEncodingTypeSize(PType); 3934 } 3935 3936 return S; 3937} 3938 3939bool ASTContext::getObjCEncodingForFunctionDecl(const FunctionDecl *Decl, 3940 std::string& S) { 3941 // Encode result type. 3942 getObjCEncodingForType(Decl->getResultType(), S); 3943 CharUnits ParmOffset; 3944 // Compute size of all parameters. 3945 for (FunctionDecl::param_const_iterator PI = Decl->param_begin(), 3946 E = Decl->param_end(); PI != E; ++PI) { 3947 QualType PType = (*PI)->getType(); 3948 CharUnits sz = getObjCEncodingTypeSize(PType); 3949 if (sz.isZero()) 3950 return true; 3951 3952 assert (sz.isPositive() && 3953 "getObjCEncodingForFunctionDecl - Incomplete param type"); 3954 ParmOffset += sz; 3955 } 3956 S += charUnitsToString(ParmOffset); 3957 ParmOffset = CharUnits::Zero(); 3958 3959 // Argument types. 3960 for (FunctionDecl::param_const_iterator PI = Decl->param_begin(), 3961 E = Decl->param_end(); PI != E; ++PI) { 3962 ParmVarDecl *PVDecl = *PI; 3963 QualType PType = PVDecl->getOriginalType(); 3964 if (const ArrayType *AT = 3965 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3966 // Use array's original type only if it has known number of 3967 // elements. 3968 if (!isa<ConstantArrayType>(AT)) 3969 PType = PVDecl->getType(); 3970 } else if (PType->isFunctionType()) 3971 PType = PVDecl->getType(); 3972 getObjCEncodingForType(PType, S); 3973 S += charUnitsToString(ParmOffset); 3974 ParmOffset += getObjCEncodingTypeSize(PType); 3975 } 3976 3977 return false; 3978} 3979 3980/// getObjCEncodingForMethodDecl - Return the encoded type for this method 3981/// declaration. 3982bool ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, 3983 std::string& S) const { 3984 // FIXME: This is not very efficient. 3985 // Encode type qualifer, 'in', 'inout', etc. for the return type. 3986 getObjCEncodingForTypeQualifier(Decl->getObjCDeclQualifier(), S); 3987 // Encode result type. 3988 getObjCEncodingForType(Decl->getResultType(), S); 3989 // Compute size of all parameters. 3990 // Start with computing size of a pointer in number of bytes. 3991 // FIXME: There might(should) be a better way of doing this computation! 3992 SourceLocation Loc; 3993 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3994 // The first two arguments (self and _cmd) are pointers; account for 3995 // their size. 3996 CharUnits ParmOffset = 2 * PtrSize; 3997 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3998 E = Decl->sel_param_end(); PI != E; ++PI) { 3999 QualType PType = (*PI)->getType(); 4000 CharUnits sz = getObjCEncodingTypeSize(PType); 4001 if (sz.isZero()) 4002 return true; 4003 4004 assert (sz.isPositive() && 4005 "getObjCEncodingForMethodDecl - Incomplete param type"); 4006 ParmOffset += sz; 4007 } 4008 S += charUnitsToString(ParmOffset); 4009 S += "@0:"; 4010 S += charUnitsToString(PtrSize); 4011 4012 // Argument types. 4013 ParmOffset = 2 * PtrSize; 4014 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 4015 E = Decl->sel_param_end(); PI != E; ++PI) { 4016 ParmVarDecl *PVDecl = *PI; 4017 QualType PType = PVDecl->getOriginalType(); 4018 if (const ArrayType *AT = 4019 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 4020 // Use array's original type only if it has known number of 4021 // elements. 4022 if (!isa<ConstantArrayType>(AT)) 4023 PType = PVDecl->getType(); 4024 } else if (PType->isFunctionType()) 4025 PType = PVDecl->getType(); 4026 // Process argument qualifiers for user supplied arguments; such as, 4027 // 'in', 'inout', etc. 4028 getObjCEncodingForTypeQualifier(PVDecl->getObjCDeclQualifier(), S); 4029 getObjCEncodingForType(PType, S); 4030 S += charUnitsToString(ParmOffset); 4031 ParmOffset += getObjCEncodingTypeSize(PType); 4032 } 4033 4034 return false; 4035} 4036 4037/// getObjCEncodingForPropertyDecl - Return the encoded type for this 4038/// property declaration. If non-NULL, Container must be either an 4039/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be 4040/// NULL when getting encodings for protocol properties. 4041/// Property attributes are stored as a comma-delimited C string. The simple 4042/// attributes readonly and bycopy are encoded as single characters. The 4043/// parametrized attributes, getter=name, setter=name, and ivar=name, are 4044/// encoded as single characters, followed by an identifier. Property types 4045/// are also encoded as a parametrized attribute. The characters used to encode 4046/// these attributes are defined by the following enumeration: 4047/// @code 4048/// enum PropertyAttributes { 4049/// kPropertyReadOnly = 'R', // property is read-only. 4050/// kPropertyBycopy = 'C', // property is a copy of the value last assigned 4051/// kPropertyByref = '&', // property is a reference to the value last assigned 4052/// kPropertyDynamic = 'D', // property is dynamic 4053/// kPropertyGetter = 'G', // followed by getter selector name 4054/// kPropertySetter = 'S', // followed by setter selector name 4055/// kPropertyInstanceVariable = 'V' // followed by instance variable name 4056/// kPropertyType = 't' // followed by old-style type encoding. 4057/// kPropertyWeak = 'W' // 'weak' property 4058/// kPropertyStrong = 'P' // property GC'able 4059/// kPropertyNonAtomic = 'N' // property non-atomic 4060/// }; 4061/// @endcode 4062void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 4063 const Decl *Container, 4064 std::string& S) const { 4065 // Collect information from the property implementation decl(s). 4066 bool Dynamic = false; 4067 ObjCPropertyImplDecl *SynthesizePID = 0; 4068 4069 // FIXME: Duplicated code due to poor abstraction. 4070 if (Container) { 4071 if (const ObjCCategoryImplDecl *CID = 4072 dyn_cast<ObjCCategoryImplDecl>(Container)) { 4073 for (ObjCCategoryImplDecl::propimpl_iterator 4074 i = CID->propimpl_begin(), e = CID->propimpl_end(); 4075 i != e; ++i) { 4076 ObjCPropertyImplDecl *PID = *i; 4077 if (PID->getPropertyDecl() == PD) { 4078 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 4079 Dynamic = true; 4080 } else { 4081 SynthesizePID = PID; 4082 } 4083 } 4084 } 4085 } else { 4086 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container); 4087 for (ObjCCategoryImplDecl::propimpl_iterator 4088 i = OID->propimpl_begin(), e = OID->propimpl_end(); 4089 i != e; ++i) { 4090 ObjCPropertyImplDecl *PID = *i; 4091 if (PID->getPropertyDecl() == PD) { 4092 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 4093 Dynamic = true; 4094 } else { 4095 SynthesizePID = PID; 4096 } 4097 } 4098 } 4099 } 4100 } 4101 4102 // FIXME: This is not very efficient. 4103 S = "T"; 4104 4105 // Encode result type. 4106 // GCC has some special rules regarding encoding of properties which 4107 // closely resembles encoding of ivars. 4108 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, 0, 4109 true /* outermost type */, 4110 true /* encoding for property */); 4111 4112 if (PD->isReadOnly()) { 4113 S += ",R"; 4114 } else { 4115 switch (PD->getSetterKind()) { 4116 case ObjCPropertyDecl::Assign: break; 4117 case ObjCPropertyDecl::Copy: S += ",C"; break; 4118 case ObjCPropertyDecl::Retain: S += ",&"; break; 4119 case ObjCPropertyDecl::Weak: S += ",W"; break; 4120 } 4121 } 4122 4123 // It really isn't clear at all what this means, since properties 4124 // are "dynamic by default". 4125 if (Dynamic) 4126 S += ",D"; 4127 4128 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) 4129 S += ",N"; 4130 4131 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) { 4132 S += ",G"; 4133 S += PD->getGetterName().getAsString(); 4134 } 4135 4136 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) { 4137 S += ",S"; 4138 S += PD->getSetterName().getAsString(); 4139 } 4140 4141 if (SynthesizePID) { 4142 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl(); 4143 S += ",V"; 4144 S += OID->getNameAsString(); 4145 } 4146 4147 // FIXME: OBJCGC: weak & strong 4148} 4149 4150/// getLegacyIntegralTypeEncoding - 4151/// Another legacy compatibility encoding: 32-bit longs are encoded as 4152/// 'l' or 'L' , but not always. For typedefs, we need to use 4153/// 'i' or 'I' instead if encoding a struct field, or a pointer! 4154/// 4155void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const { 4156 if (isa<TypedefType>(PointeeTy.getTypePtr())) { 4157 if (const BuiltinType *BT = PointeeTy->getAs<BuiltinType>()) { 4158 if (BT->getKind() == BuiltinType::ULong && getIntWidth(PointeeTy) == 32) 4159 PointeeTy = UnsignedIntTy; 4160 else 4161 if (BT->getKind() == BuiltinType::Long && getIntWidth(PointeeTy) == 32) 4162 PointeeTy = IntTy; 4163 } 4164 } 4165} 4166 4167void ASTContext::getObjCEncodingForType(QualType T, std::string& S, 4168 const FieldDecl *Field) const { 4169 // We follow the behavior of gcc, expanding structures which are 4170 // directly pointed to, and expanding embedded structures. Note that 4171 // these rules are sufficient to prevent recursive encoding of the 4172 // same type. 4173 getObjCEncodingForTypeImpl(T, S, true, true, Field, 4174 true /* outermost type */); 4175} 4176 4177static char ObjCEncodingForPrimitiveKind(const ASTContext *C, QualType T) { 4178 switch (T->getAs<BuiltinType>()->getKind()) { 4179 default: llvm_unreachable("Unhandled builtin type kind"); 4180 case BuiltinType::Void: return 'v'; 4181 case BuiltinType::Bool: return 'B'; 4182 case BuiltinType::Char_U: 4183 case BuiltinType::UChar: return 'C'; 4184 case BuiltinType::UShort: return 'S'; 4185 case BuiltinType::UInt: return 'I'; 4186 case BuiltinType::ULong: 4187 return C->getIntWidth(T) == 32 ? 'L' : 'Q'; 4188 case BuiltinType::UInt128: return 'T'; 4189 case BuiltinType::ULongLong: return 'Q'; 4190 case BuiltinType::Char_S: 4191 case BuiltinType::SChar: return 'c'; 4192 case BuiltinType::Short: return 's'; 4193 case BuiltinType::WChar_S: 4194 case BuiltinType::WChar_U: 4195 case BuiltinType::Int: return 'i'; 4196 case BuiltinType::Long: 4197 return C->getIntWidth(T) == 32 ? 'l' : 'q'; 4198 case BuiltinType::LongLong: return 'q'; 4199 case BuiltinType::Int128: return 't'; 4200 case BuiltinType::Float: return 'f'; 4201 case BuiltinType::Double: return 'd'; 4202 case BuiltinType::LongDouble: return 'D'; 4203 } 4204} 4205 4206static char ObjCEncodingForEnumType(const ASTContext *C, const EnumType *ET) { 4207 EnumDecl *Enum = ET->getDecl(); 4208 4209 // The encoding of an non-fixed enum type is always 'i', regardless of size. 4210 if (!Enum->isFixed()) 4211 return 'i'; 4212 4213 // The encoding of a fixed enum type matches its fixed underlying type. 4214 return ObjCEncodingForPrimitiveKind(C, Enum->getIntegerType()); 4215} 4216 4217static void EncodeBitField(const ASTContext *Ctx, std::string& S, 4218 QualType T, const FieldDecl *FD) { 4219 const Expr *E = FD->getBitWidth(); 4220 assert(E && "bitfield width not there - getObjCEncodingForTypeImpl"); 4221 S += 'b'; 4222 // The NeXT runtime encodes bit fields as b followed by the number of bits. 4223 // The GNU runtime requires more information; bitfields are encoded as b, 4224 // then the offset (in bits) of the first element, then the type of the 4225 // bitfield, then the size in bits. For example, in this structure: 4226 // 4227 // struct 4228 // { 4229 // int integer; 4230 // int flags:2; 4231 // }; 4232 // On a 32-bit system, the encoding for flags would be b2 for the NeXT 4233 // runtime, but b32i2 for the GNU runtime. The reason for this extra 4234 // information is not especially sensible, but we're stuck with it for 4235 // compatibility with GCC, although providing it breaks anything that 4236 // actually uses runtime introspection and wants to work on both runtimes... 4237 if (!Ctx->getLangOptions().NeXTRuntime) { 4238 const RecordDecl *RD = FD->getParent(); 4239 const ASTRecordLayout &RL = Ctx->getASTRecordLayout(RD); 4240 S += llvm::utostr(RL.getFieldOffset(FD->getFieldIndex())); 4241 if (const EnumType *ET = T->getAs<EnumType>()) 4242 S += ObjCEncodingForEnumType(Ctx, ET); 4243 else 4244 S += ObjCEncodingForPrimitiveKind(Ctx, T); 4245 } 4246 unsigned N = E->EvaluateAsInt(*Ctx).getZExtValue(); 4247 S += llvm::utostr(N); 4248} 4249 4250// FIXME: Use SmallString for accumulating string. 4251void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S, 4252 bool ExpandPointedToStructures, 4253 bool ExpandStructures, 4254 const FieldDecl *FD, 4255 bool OutermostType, 4256 bool EncodingProperty, 4257 bool StructField) const { 4258 if (T->getAs<BuiltinType>()) { 4259 if (FD && FD->isBitField()) 4260 return EncodeBitField(this, S, T, FD); 4261 S += ObjCEncodingForPrimitiveKind(this, T); 4262 return; 4263 } 4264 4265 if (const ComplexType *CT = T->getAs<ComplexType>()) { 4266 S += 'j'; 4267 getObjCEncodingForTypeImpl(CT->getElementType(), S, false, false, 0, false, 4268 false); 4269 return; 4270 } 4271 4272 // encoding for pointer or r3eference types. 4273 QualType PointeeTy; 4274 if (const PointerType *PT = T->getAs<PointerType>()) { 4275 if (PT->isObjCSelType()) { 4276 S += ':'; 4277 return; 4278 } 4279 PointeeTy = PT->getPointeeType(); 4280 } 4281 else if (const ReferenceType *RT = T->getAs<ReferenceType>()) 4282 PointeeTy = RT->getPointeeType(); 4283 if (!PointeeTy.isNull()) { 4284 bool isReadOnly = false; 4285 // For historical/compatibility reasons, the read-only qualifier of the 4286 // pointee gets emitted _before_ the '^'. The read-only qualifier of 4287 // the pointer itself gets ignored, _unless_ we are looking at a typedef! 4288 // Also, do not emit the 'r' for anything but the outermost type! 4289 if (isa<TypedefType>(T.getTypePtr())) { 4290 if (OutermostType && T.isConstQualified()) { 4291 isReadOnly = true; 4292 S += 'r'; 4293 } 4294 } else if (OutermostType) { 4295 QualType P = PointeeTy; 4296 while (P->getAs<PointerType>()) 4297 P = P->getAs<PointerType>()->getPointeeType(); 4298 if (P.isConstQualified()) { 4299 isReadOnly = true; 4300 S += 'r'; 4301 } 4302 } 4303 if (isReadOnly) { 4304 // Another legacy compatibility encoding. Some ObjC qualifier and type 4305 // combinations need to be rearranged. 4306 // Rewrite "in const" from "nr" to "rn" 4307 if (StringRef(S).endswith("nr")) 4308 S.replace(S.end()-2, S.end(), "rn"); 4309 } 4310 4311 if (PointeeTy->isCharType()) { 4312 // char pointer types should be encoded as '*' unless it is a 4313 // type that has been typedef'd to 'BOOL'. 4314 if (!isTypeTypedefedAsBOOL(PointeeTy)) { 4315 S += '*'; 4316 return; 4317 } 4318 } else if (const RecordType *RTy = PointeeTy->getAs<RecordType>()) { 4319 // GCC binary compat: Need to convert "struct objc_class *" to "#". 4320 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_class")) { 4321 S += '#'; 4322 return; 4323 } 4324 // GCC binary compat: Need to convert "struct objc_object *" to "@". 4325 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_object")) { 4326 S += '@'; 4327 return; 4328 } 4329 // fall through... 4330 } 4331 S += '^'; 4332 getLegacyIntegralTypeEncoding(PointeeTy); 4333 4334 getObjCEncodingForTypeImpl(PointeeTy, S, false, ExpandPointedToStructures, 4335 NULL); 4336 return; 4337 } 4338 4339 if (const ArrayType *AT = 4340 // Ignore type qualifiers etc. 4341 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) { 4342 if (isa<IncompleteArrayType>(AT) && !StructField) { 4343 // Incomplete arrays are encoded as a pointer to the array element. 4344 S += '^'; 4345 4346 getObjCEncodingForTypeImpl(AT->getElementType(), S, 4347 false, ExpandStructures, FD); 4348 } else { 4349 S += '['; 4350 4351 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) { 4352 if (getTypeSize(CAT->getElementType()) == 0) 4353 S += '0'; 4354 else 4355 S += llvm::utostr(CAT->getSize().getZExtValue()); 4356 } else { 4357 //Variable length arrays are encoded as a regular array with 0 elements. 4358 assert((isa<VariableArrayType>(AT) || isa<IncompleteArrayType>(AT)) && 4359 "Unknown array type!"); 4360 S += '0'; 4361 } 4362 4363 getObjCEncodingForTypeImpl(AT->getElementType(), S, 4364 false, ExpandStructures, FD); 4365 S += ']'; 4366 } 4367 return; 4368 } 4369 4370 if (T->getAs<FunctionType>()) { 4371 S += '?'; 4372 return; 4373 } 4374 4375 if (const RecordType *RTy = T->getAs<RecordType>()) { 4376 RecordDecl *RDecl = RTy->getDecl(); 4377 S += RDecl->isUnion() ? '(' : '{'; 4378 // Anonymous structures print as '?' 4379 if (const IdentifierInfo *II = RDecl->getIdentifier()) { 4380 S += II->getName(); 4381 if (ClassTemplateSpecializationDecl *Spec 4382 = dyn_cast<ClassTemplateSpecializationDecl>(RDecl)) { 4383 const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs(); 4384 std::string TemplateArgsStr 4385 = TemplateSpecializationType::PrintTemplateArgumentList( 4386 TemplateArgs.data(), 4387 TemplateArgs.size(), 4388 (*this).getPrintingPolicy()); 4389 4390 S += TemplateArgsStr; 4391 } 4392 } else { 4393 S += '?'; 4394 } 4395 if (ExpandStructures) { 4396 S += '='; 4397 if (!RDecl->isUnion()) { 4398 getObjCEncodingForStructureImpl(RDecl, S, FD); 4399 } else { 4400 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 4401 FieldEnd = RDecl->field_end(); 4402 Field != FieldEnd; ++Field) { 4403 if (FD) { 4404 S += '"'; 4405 S += Field->getNameAsString(); 4406 S += '"'; 4407 } 4408 4409 // Special case bit-fields. 4410 if (Field->isBitField()) { 4411 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, 4412 (*Field)); 4413 } else { 4414 QualType qt = Field->getType(); 4415 getLegacyIntegralTypeEncoding(qt); 4416 getObjCEncodingForTypeImpl(qt, S, false, true, 4417 FD, /*OutermostType*/false, 4418 /*EncodingProperty*/false, 4419 /*StructField*/true); 4420 } 4421 } 4422 } 4423 } 4424 S += RDecl->isUnion() ? ')' : '}'; 4425 return; 4426 } 4427 4428 if (const EnumType *ET = T->getAs<EnumType>()) { 4429 if (FD && FD->isBitField()) 4430 EncodeBitField(this, S, T, FD); 4431 else 4432 S += ObjCEncodingForEnumType(this, ET); 4433 return; 4434 } 4435 4436 if (T->isBlockPointerType()) { 4437 S += "@?"; // Unlike a pointer-to-function, which is "^?". 4438 return; 4439 } 4440 4441 // Ignore protocol qualifiers when mangling at this level. 4442 if (const ObjCObjectType *OT = T->getAs<ObjCObjectType>()) 4443 T = OT->getBaseType(); 4444 4445 if (const ObjCInterfaceType *OIT = T->getAs<ObjCInterfaceType>()) { 4446 // @encode(class_name) 4447 ObjCInterfaceDecl *OI = OIT->getDecl(); 4448 S += '{'; 4449 const IdentifierInfo *II = OI->getIdentifier(); 4450 S += II->getName(); 4451 S += '='; 4452 SmallVector<const ObjCIvarDecl*, 32> Ivars; 4453 DeepCollectObjCIvars(OI, true, Ivars); 4454 for (unsigned i = 0, e = Ivars.size(); i != e; ++i) { 4455 const FieldDecl *Field = cast<FieldDecl>(Ivars[i]); 4456 if (Field->isBitField()) 4457 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, Field); 4458 else 4459 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, FD); 4460 } 4461 S += '}'; 4462 return; 4463 } 4464 4465 if (const ObjCObjectPointerType *OPT = T->getAs<ObjCObjectPointerType>()) { 4466 if (OPT->isObjCIdType()) { 4467 S += '@'; 4468 return; 4469 } 4470 4471 if (OPT->isObjCClassType() || OPT->isObjCQualifiedClassType()) { 4472 // FIXME: Consider if we need to output qualifiers for 'Class<p>'. 4473 // Since this is a binary compatibility issue, need to consult with runtime 4474 // folks. Fortunately, this is a *very* obsure construct. 4475 S += '#'; 4476 return; 4477 } 4478 4479 if (OPT->isObjCQualifiedIdType()) { 4480 getObjCEncodingForTypeImpl(getObjCIdType(), S, 4481 ExpandPointedToStructures, 4482 ExpandStructures, FD); 4483 if (FD || EncodingProperty) { 4484 // Note that we do extended encoding of protocol qualifer list 4485 // Only when doing ivar or property encoding. 4486 S += '"'; 4487 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 4488 E = OPT->qual_end(); I != E; ++I) { 4489 S += '<'; 4490 S += (*I)->getNameAsString(); 4491 S += '>'; 4492 } 4493 S += '"'; 4494 } 4495 return; 4496 } 4497 4498 QualType PointeeTy = OPT->getPointeeType(); 4499 if (!EncodingProperty && 4500 isa<TypedefType>(PointeeTy.getTypePtr())) { 4501 // Another historical/compatibility reason. 4502 // We encode the underlying type which comes out as 4503 // {...}; 4504 S += '^'; 4505 getObjCEncodingForTypeImpl(PointeeTy, S, 4506 false, ExpandPointedToStructures, 4507 NULL); 4508 return; 4509 } 4510 4511 S += '@'; 4512 if (OPT->getInterfaceDecl() && (FD || EncodingProperty)) { 4513 S += '"'; 4514 S += OPT->getInterfaceDecl()->getIdentifier()->getName(); 4515 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 4516 E = OPT->qual_end(); I != E; ++I) { 4517 S += '<'; 4518 S += (*I)->getNameAsString(); 4519 S += '>'; 4520 } 4521 S += '"'; 4522 } 4523 return; 4524 } 4525 4526 // gcc just blithely ignores member pointers. 4527 // TODO: maybe there should be a mangling for these 4528 if (T->getAs<MemberPointerType>()) 4529 return; 4530 4531 if (T->isVectorType()) { 4532 // This matches gcc's encoding, even though technically it is 4533 // insufficient. 4534 // FIXME. We should do a better job than gcc. 4535 return; 4536 } 4537 4538 llvm_unreachable("@encode for type not implemented!"); 4539} 4540 4541void ASTContext::getObjCEncodingForStructureImpl(RecordDecl *RDecl, 4542 std::string &S, 4543 const FieldDecl *FD, 4544 bool includeVBases) const { 4545 assert(RDecl && "Expected non-null RecordDecl"); 4546 assert(!RDecl->isUnion() && "Should not be called for unions"); 4547 if (!RDecl->getDefinition()) 4548 return; 4549 4550 CXXRecordDecl *CXXRec = dyn_cast<CXXRecordDecl>(RDecl); 4551 std::multimap<uint64_t, NamedDecl *> FieldOrBaseOffsets; 4552 const ASTRecordLayout &layout = getASTRecordLayout(RDecl); 4553 4554 if (CXXRec) { 4555 for (CXXRecordDecl::base_class_iterator 4556 BI = CXXRec->bases_begin(), 4557 BE = CXXRec->bases_end(); BI != BE; ++BI) { 4558 if (!BI->isVirtual()) { 4559 CXXRecordDecl *base = BI->getType()->getAsCXXRecordDecl(); 4560 if (base->isEmpty()) 4561 continue; 4562 uint64_t offs = layout.getBaseClassOffsetInBits(base); 4563 FieldOrBaseOffsets.insert(FieldOrBaseOffsets.upper_bound(offs), 4564 std::make_pair(offs, base)); 4565 } 4566 } 4567 } 4568 4569 unsigned i = 0; 4570 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 4571 FieldEnd = RDecl->field_end(); 4572 Field != FieldEnd; ++Field, ++i) { 4573 uint64_t offs = layout.getFieldOffset(i); 4574 FieldOrBaseOffsets.insert(FieldOrBaseOffsets.upper_bound(offs), 4575 std::make_pair(offs, *Field)); 4576 } 4577 4578 if (CXXRec && includeVBases) { 4579 for (CXXRecordDecl::base_class_iterator 4580 BI = CXXRec->vbases_begin(), 4581 BE = CXXRec->vbases_end(); BI != BE; ++BI) { 4582 CXXRecordDecl *base = BI->getType()->getAsCXXRecordDecl(); 4583 if (base->isEmpty()) 4584 continue; 4585 uint64_t offs = layout.getVBaseClassOffsetInBits(base); 4586 if (FieldOrBaseOffsets.find(offs) == FieldOrBaseOffsets.end()) 4587 FieldOrBaseOffsets.insert(FieldOrBaseOffsets.end(), 4588 std::make_pair(offs, base)); 4589 } 4590 } 4591 4592 CharUnits size; 4593 if (CXXRec) { 4594 size = includeVBases ? layout.getSize() : layout.getNonVirtualSize(); 4595 } else { 4596 size = layout.getSize(); 4597 } 4598 4599 uint64_t CurOffs = 0; 4600 std::multimap<uint64_t, NamedDecl *>::iterator 4601 CurLayObj = FieldOrBaseOffsets.begin(); 4602 4603 if ((CurLayObj != FieldOrBaseOffsets.end() && CurLayObj->first != 0) || 4604 (CurLayObj == FieldOrBaseOffsets.end() && 4605 CXXRec && CXXRec->isDynamicClass())) { 4606 assert(CXXRec && CXXRec->isDynamicClass() && 4607 "Offset 0 was empty but no VTable ?"); 4608 if (FD) { 4609 S += "\"_vptr$"; 4610 std::string recname = CXXRec->getNameAsString(); 4611 if (recname.empty()) recname = "?"; 4612 S += recname; 4613 S += '"'; 4614 } 4615 S += "^^?"; 4616 CurOffs += getTypeSize(VoidPtrTy); 4617 } 4618 4619 if (!RDecl->hasFlexibleArrayMember()) { 4620 // Mark the end of the structure. 4621 uint64_t offs = toBits(size); 4622 FieldOrBaseOffsets.insert(FieldOrBaseOffsets.upper_bound(offs), 4623 std::make_pair(offs, (NamedDecl*)0)); 4624 } 4625 4626 for (; CurLayObj != FieldOrBaseOffsets.end(); ++CurLayObj) { 4627 assert(CurOffs <= CurLayObj->first); 4628 4629 if (CurOffs < CurLayObj->first) { 4630 uint64_t padding = CurLayObj->first - CurOffs; 4631 // FIXME: There doesn't seem to be a way to indicate in the encoding that 4632 // packing/alignment of members is different that normal, in which case 4633 // the encoding will be out-of-sync with the real layout. 4634 // If the runtime switches to just consider the size of types without 4635 // taking into account alignment, we could make padding explicit in the 4636 // encoding (e.g. using arrays of chars). The encoding strings would be 4637 // longer then though. 4638 CurOffs += padding; 4639 } 4640 4641 NamedDecl *dcl = CurLayObj->second; 4642 if (dcl == 0) 4643 break; // reached end of structure. 4644 4645 if (CXXRecordDecl *base = dyn_cast<CXXRecordDecl>(dcl)) { 4646 // We expand the bases without their virtual bases since those are going 4647 // in the initial structure. Note that this differs from gcc which 4648 // expands virtual bases each time one is encountered in the hierarchy, 4649 // making the encoding type bigger than it really is. 4650 getObjCEncodingForStructureImpl(base, S, FD, /*includeVBases*/false); 4651 assert(!base->isEmpty()); 4652 CurOffs += toBits(getASTRecordLayout(base).getNonVirtualSize()); 4653 } else { 4654 FieldDecl *field = cast<FieldDecl>(dcl); 4655 if (FD) { 4656 S += '"'; 4657 S += field->getNameAsString(); 4658 S += '"'; 4659 } 4660 4661 if (field->isBitField()) { 4662 EncodeBitField(this, S, field->getType(), field); 4663 CurOffs += field->getBitWidth()->EvaluateAsInt(*this).getZExtValue(); 4664 } else { 4665 QualType qt = field->getType(); 4666 getLegacyIntegralTypeEncoding(qt); 4667 getObjCEncodingForTypeImpl(qt, S, false, true, FD, 4668 /*OutermostType*/false, 4669 /*EncodingProperty*/false, 4670 /*StructField*/true); 4671 CurOffs += getTypeSize(field->getType()); 4672 } 4673 } 4674 } 4675} 4676 4677void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 4678 std::string& S) const { 4679 if (QT & Decl::OBJC_TQ_In) 4680 S += 'n'; 4681 if (QT & Decl::OBJC_TQ_Inout) 4682 S += 'N'; 4683 if (QT & Decl::OBJC_TQ_Out) 4684 S += 'o'; 4685 if (QT & Decl::OBJC_TQ_Bycopy) 4686 S += 'O'; 4687 if (QT & Decl::OBJC_TQ_Byref) 4688 S += 'R'; 4689 if (QT & Decl::OBJC_TQ_Oneway) 4690 S += 'V'; 4691} 4692 4693void ASTContext::setBuiltinVaListType(QualType T) { 4694 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!"); 4695 4696 BuiltinVaListType = T; 4697} 4698 4699TypedefDecl *ASTContext::getObjCIdDecl() const { 4700 if (!ObjCIdDecl) { 4701 QualType T = getObjCObjectType(ObjCBuiltinIdTy, 0, 0); 4702 T = getObjCObjectPointerType(T); 4703 TypeSourceInfo *IdInfo = getTrivialTypeSourceInfo(T); 4704 ObjCIdDecl = TypedefDecl::Create(const_cast<ASTContext &>(*this), 4705 getTranslationUnitDecl(), 4706 SourceLocation(), SourceLocation(), 4707 &Idents.get("id"), IdInfo); 4708 } 4709 4710 return ObjCIdDecl; 4711} 4712 4713TypedefDecl *ASTContext::getObjCSelDecl() const { 4714 if (!ObjCSelDecl) { 4715 QualType SelT = getPointerType(ObjCBuiltinSelTy); 4716 TypeSourceInfo *SelInfo = getTrivialTypeSourceInfo(SelT); 4717 ObjCSelDecl = TypedefDecl::Create(const_cast<ASTContext &>(*this), 4718 getTranslationUnitDecl(), 4719 SourceLocation(), SourceLocation(), 4720 &Idents.get("SEL"), SelInfo); 4721 } 4722 return ObjCSelDecl; 4723} 4724 4725void ASTContext::setObjCProtoType(QualType QT) { 4726 ObjCProtoType = QT; 4727} 4728 4729TypedefDecl *ASTContext::getObjCClassDecl() const { 4730 if (!ObjCClassDecl) { 4731 QualType T = getObjCObjectType(ObjCBuiltinClassTy, 0, 0); 4732 T = getObjCObjectPointerType(T); 4733 TypeSourceInfo *ClassInfo = getTrivialTypeSourceInfo(T); 4734 ObjCClassDecl = TypedefDecl::Create(const_cast<ASTContext &>(*this), 4735 getTranslationUnitDecl(), 4736 SourceLocation(), SourceLocation(), 4737 &Idents.get("Class"), ClassInfo); 4738 } 4739 4740 return ObjCClassDecl; 4741} 4742 4743void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) { 4744 assert(ObjCConstantStringType.isNull() && 4745 "'NSConstantString' type already set!"); 4746 4747 ObjCConstantStringType = getObjCInterfaceType(Decl); 4748} 4749 4750/// \brief Retrieve the template name that corresponds to a non-empty 4751/// lookup. 4752TemplateName 4753ASTContext::getOverloadedTemplateName(UnresolvedSetIterator Begin, 4754 UnresolvedSetIterator End) const { 4755 unsigned size = End - Begin; 4756 assert(size > 1 && "set is not overloaded!"); 4757 4758 void *memory = Allocate(sizeof(OverloadedTemplateStorage) + 4759 size * sizeof(FunctionTemplateDecl*)); 4760 OverloadedTemplateStorage *OT = new(memory) OverloadedTemplateStorage(size); 4761 4762 NamedDecl **Storage = OT->getStorage(); 4763 for (UnresolvedSetIterator I = Begin; I != End; ++I) { 4764 NamedDecl *D = *I; 4765 assert(isa<FunctionTemplateDecl>(D) || 4766 (isa<UsingShadowDecl>(D) && 4767 isa<FunctionTemplateDecl>(D->getUnderlyingDecl()))); 4768 *Storage++ = D; 4769 } 4770 4771 return TemplateName(OT); 4772} 4773 4774/// \brief Retrieve the template name that represents a qualified 4775/// template name such as \c std::vector. 4776TemplateName 4777ASTContext::getQualifiedTemplateName(NestedNameSpecifier *NNS, 4778 bool TemplateKeyword, 4779 TemplateDecl *Template) const { 4780 assert(NNS && "Missing nested-name-specifier in qualified template name"); 4781 4782 // FIXME: Canonicalization? 4783 llvm::FoldingSetNodeID ID; 4784 QualifiedTemplateName::Profile(ID, NNS, TemplateKeyword, Template); 4785 4786 void *InsertPos = 0; 4787 QualifiedTemplateName *QTN = 4788 QualifiedTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4789 if (!QTN) { 4790 QTN = new (*this,4) QualifiedTemplateName(NNS, TemplateKeyword, Template); 4791 QualifiedTemplateNames.InsertNode(QTN, InsertPos); 4792 } 4793 4794 return TemplateName(QTN); 4795} 4796 4797/// \brief Retrieve the template name that represents a dependent 4798/// template name such as \c MetaFun::template apply. 4799TemplateName 4800ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 4801 const IdentifierInfo *Name) const { 4802 assert((!NNS || NNS->isDependent()) && 4803 "Nested name specifier must be dependent"); 4804 4805 llvm::FoldingSetNodeID ID; 4806 DependentTemplateName::Profile(ID, NNS, Name); 4807 4808 void *InsertPos = 0; 4809 DependentTemplateName *QTN = 4810 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4811 4812 if (QTN) 4813 return TemplateName(QTN); 4814 4815 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 4816 if (CanonNNS == NNS) { 4817 QTN = new (*this,4) DependentTemplateName(NNS, Name); 4818 } else { 4819 TemplateName Canon = getDependentTemplateName(CanonNNS, Name); 4820 QTN = new (*this,4) DependentTemplateName(NNS, Name, Canon); 4821 DependentTemplateName *CheckQTN = 4822 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4823 assert(!CheckQTN && "Dependent type name canonicalization broken"); 4824 (void)CheckQTN; 4825 } 4826 4827 DependentTemplateNames.InsertNode(QTN, InsertPos); 4828 return TemplateName(QTN); 4829} 4830 4831/// \brief Retrieve the template name that represents a dependent 4832/// template name such as \c MetaFun::template operator+. 4833TemplateName 4834ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 4835 OverloadedOperatorKind Operator) const { 4836 assert((!NNS || NNS->isDependent()) && 4837 "Nested name specifier must be dependent"); 4838 4839 llvm::FoldingSetNodeID ID; 4840 DependentTemplateName::Profile(ID, NNS, Operator); 4841 4842 void *InsertPos = 0; 4843 DependentTemplateName *QTN 4844 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4845 4846 if (QTN) 4847 return TemplateName(QTN); 4848 4849 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 4850 if (CanonNNS == NNS) { 4851 QTN = new (*this,4) DependentTemplateName(NNS, Operator); 4852 } else { 4853 TemplateName Canon = getDependentTemplateName(CanonNNS, Operator); 4854 QTN = new (*this,4) DependentTemplateName(NNS, Operator, Canon); 4855 4856 DependentTemplateName *CheckQTN 4857 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4858 assert(!CheckQTN && "Dependent template name canonicalization broken"); 4859 (void)CheckQTN; 4860 } 4861 4862 DependentTemplateNames.InsertNode(QTN, InsertPos); 4863 return TemplateName(QTN); 4864} 4865 4866TemplateName 4867ASTContext::getSubstTemplateTemplateParm(TemplateTemplateParmDecl *param, 4868 TemplateName replacement) const { 4869 llvm::FoldingSetNodeID ID; 4870 SubstTemplateTemplateParmStorage::Profile(ID, param, replacement); 4871 4872 void *insertPos = 0; 4873 SubstTemplateTemplateParmStorage *subst 4874 = SubstTemplateTemplateParms.FindNodeOrInsertPos(ID, insertPos); 4875 4876 if (!subst) { 4877 subst = new (*this) SubstTemplateTemplateParmStorage(param, replacement); 4878 SubstTemplateTemplateParms.InsertNode(subst, insertPos); 4879 } 4880 4881 return TemplateName(subst); 4882} 4883 4884TemplateName 4885ASTContext::getSubstTemplateTemplateParmPack(TemplateTemplateParmDecl *Param, 4886 const TemplateArgument &ArgPack) const { 4887 ASTContext &Self = const_cast<ASTContext &>(*this); 4888 llvm::FoldingSetNodeID ID; 4889 SubstTemplateTemplateParmPackStorage::Profile(ID, Self, Param, ArgPack); 4890 4891 void *InsertPos = 0; 4892 SubstTemplateTemplateParmPackStorage *Subst 4893 = SubstTemplateTemplateParmPacks.FindNodeOrInsertPos(ID, InsertPos); 4894 4895 if (!Subst) { 4896 Subst = new (*this) SubstTemplateTemplateParmPackStorage(Param, 4897 ArgPack.pack_size(), 4898 ArgPack.pack_begin()); 4899 SubstTemplateTemplateParmPacks.InsertNode(Subst, InsertPos); 4900 } 4901 4902 return TemplateName(Subst); 4903} 4904 4905/// getFromTargetType - Given one of the integer types provided by 4906/// TargetInfo, produce the corresponding type. The unsigned @p Type 4907/// is actually a value of type @c TargetInfo::IntType. 4908CanQualType ASTContext::getFromTargetType(unsigned Type) const { 4909 switch (Type) { 4910 case TargetInfo::NoInt: return CanQualType(); 4911 case TargetInfo::SignedShort: return ShortTy; 4912 case TargetInfo::UnsignedShort: return UnsignedShortTy; 4913 case TargetInfo::SignedInt: return IntTy; 4914 case TargetInfo::UnsignedInt: return UnsignedIntTy; 4915 case TargetInfo::SignedLong: return LongTy; 4916 case TargetInfo::UnsignedLong: return UnsignedLongTy; 4917 case TargetInfo::SignedLongLong: return LongLongTy; 4918 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy; 4919 } 4920 4921 llvm_unreachable("Unhandled TargetInfo::IntType value"); 4922} 4923 4924//===----------------------------------------------------------------------===// 4925// Type Predicates. 4926//===----------------------------------------------------------------------===// 4927 4928/// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 4929/// garbage collection attribute. 4930/// 4931Qualifiers::GC ASTContext::getObjCGCAttrKind(QualType Ty) const { 4932 if (getLangOptions().getGC() == LangOptions::NonGC) 4933 return Qualifiers::GCNone; 4934 4935 assert(getLangOptions().ObjC1); 4936 Qualifiers::GC GCAttrs = Ty.getObjCGCAttr(); 4937 4938 // Default behaviour under objective-C's gc is for ObjC pointers 4939 // (or pointers to them) be treated as though they were declared 4940 // as __strong. 4941 if (GCAttrs == Qualifiers::GCNone) { 4942 if (Ty->isObjCObjectPointerType() || Ty->isBlockPointerType()) 4943 return Qualifiers::Strong; 4944 else if (Ty->isPointerType()) 4945 return getObjCGCAttrKind(Ty->getAs<PointerType>()->getPointeeType()); 4946 } else { 4947 // It's not valid to set GC attributes on anything that isn't a 4948 // pointer. 4949#ifndef NDEBUG 4950 QualType CT = Ty->getCanonicalTypeInternal(); 4951 while (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 4952 CT = AT->getElementType(); 4953 assert(CT->isAnyPointerType() || CT->isBlockPointerType()); 4954#endif 4955 } 4956 return GCAttrs; 4957} 4958 4959//===----------------------------------------------------------------------===// 4960// Type Compatibility Testing 4961//===----------------------------------------------------------------------===// 4962 4963/// areCompatVectorTypes - Return true if the two specified vector types are 4964/// compatible. 4965static bool areCompatVectorTypes(const VectorType *LHS, 4966 const VectorType *RHS) { 4967 assert(LHS->isCanonicalUnqualified() && RHS->isCanonicalUnqualified()); 4968 return LHS->getElementType() == RHS->getElementType() && 4969 LHS->getNumElements() == RHS->getNumElements(); 4970} 4971 4972bool ASTContext::areCompatibleVectorTypes(QualType FirstVec, 4973 QualType SecondVec) { 4974 assert(FirstVec->isVectorType() && "FirstVec should be a vector type"); 4975 assert(SecondVec->isVectorType() && "SecondVec should be a vector type"); 4976 4977 if (hasSameUnqualifiedType(FirstVec, SecondVec)) 4978 return true; 4979 4980 // Treat Neon vector types and most AltiVec vector types as if they are the 4981 // equivalent GCC vector types. 4982 const VectorType *First = FirstVec->getAs<VectorType>(); 4983 const VectorType *Second = SecondVec->getAs<VectorType>(); 4984 if (First->getNumElements() == Second->getNumElements() && 4985 hasSameType(First->getElementType(), Second->getElementType()) && 4986 First->getVectorKind() != VectorType::AltiVecPixel && 4987 First->getVectorKind() != VectorType::AltiVecBool && 4988 Second->getVectorKind() != VectorType::AltiVecPixel && 4989 Second->getVectorKind() != VectorType::AltiVecBool) 4990 return true; 4991 4992 return false; 4993} 4994 4995//===----------------------------------------------------------------------===// 4996// ObjCQualifiedIdTypesAreCompatible - Compatibility testing for qualified id's. 4997//===----------------------------------------------------------------------===// 4998 4999/// ProtocolCompatibleWithProtocol - return 'true' if 'lProto' is in the 5000/// inheritance hierarchy of 'rProto'. 5001bool 5002ASTContext::ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 5003 ObjCProtocolDecl *rProto) const { 5004 if (lProto == rProto) 5005 return true; 5006 for (ObjCProtocolDecl::protocol_iterator PI = rProto->protocol_begin(), 5007 E = rProto->protocol_end(); PI != E; ++PI) 5008 if (ProtocolCompatibleWithProtocol(lProto, *PI)) 5009 return true; 5010 return false; 5011} 5012 5013/// QualifiedIdConformsQualifiedId - compare id<p,...> with id<p1,...> 5014/// return true if lhs's protocols conform to rhs's protocol; false 5015/// otherwise. 5016bool ASTContext::QualifiedIdConformsQualifiedId(QualType lhs, QualType rhs) { 5017 if (lhs->isObjCQualifiedIdType() && rhs->isObjCQualifiedIdType()) 5018 return ObjCQualifiedIdTypesAreCompatible(lhs, rhs, false); 5019 return false; 5020} 5021 5022/// ObjCQualifiedClassTypesAreCompatible - compare Class<p,...> and 5023/// Class<p1, ...>. 5024bool ASTContext::ObjCQualifiedClassTypesAreCompatible(QualType lhs, 5025 QualType rhs) { 5026 const ObjCObjectPointerType *lhsQID = lhs->getAs<ObjCObjectPointerType>(); 5027 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 5028 assert ((lhsQID && rhsOPT) && "ObjCQualifiedClassTypesAreCompatible"); 5029 5030 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 5031 E = lhsQID->qual_end(); I != E; ++I) { 5032 bool match = false; 5033 ObjCProtocolDecl *lhsProto = *I; 5034 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 5035 E = rhsOPT->qual_end(); J != E; ++J) { 5036 ObjCProtocolDecl *rhsProto = *J; 5037 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto)) { 5038 match = true; 5039 break; 5040 } 5041 } 5042 if (!match) 5043 return false; 5044 } 5045 return true; 5046} 5047 5048/// ObjCQualifiedIdTypesAreCompatible - We know that one of lhs/rhs is an 5049/// ObjCQualifiedIDType. 5050bool ASTContext::ObjCQualifiedIdTypesAreCompatible(QualType lhs, QualType rhs, 5051 bool compare) { 5052 // Allow id<P..> and an 'id' or void* type in all cases. 5053 if (lhs->isVoidPointerType() || 5054 lhs->isObjCIdType() || lhs->isObjCClassType()) 5055 return true; 5056 else if (rhs->isVoidPointerType() || 5057 rhs->isObjCIdType() || rhs->isObjCClassType()) 5058 return true; 5059 5060 if (const ObjCObjectPointerType *lhsQID = lhs->getAsObjCQualifiedIdType()) { 5061 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 5062 5063 if (!rhsOPT) return false; 5064 5065 if (rhsOPT->qual_empty()) { 5066 // If the RHS is a unqualified interface pointer "NSString*", 5067 // make sure we check the class hierarchy. 5068 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 5069 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 5070 E = lhsQID->qual_end(); I != E; ++I) { 5071 // when comparing an id<P> on lhs with a static type on rhs, 5072 // see if static class implements all of id's protocols, directly or 5073 // through its super class and categories. 5074 if (!rhsID->ClassImplementsProtocol(*I, true)) 5075 return false; 5076 } 5077 } 5078 // If there are no qualifiers and no interface, we have an 'id'. 5079 return true; 5080 } 5081 // Both the right and left sides have qualifiers. 5082 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 5083 E = lhsQID->qual_end(); I != E; ++I) { 5084 ObjCProtocolDecl *lhsProto = *I; 5085 bool match = false; 5086 5087 // when comparing an id<P> on lhs with a static type on rhs, 5088 // see if static class implements all of id's protocols, directly or 5089 // through its super class and categories. 5090 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 5091 E = rhsOPT->qual_end(); J != E; ++J) { 5092 ObjCProtocolDecl *rhsProto = *J; 5093 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 5094 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 5095 match = true; 5096 break; 5097 } 5098 } 5099 // If the RHS is a qualified interface pointer "NSString<P>*", 5100 // make sure we check the class hierarchy. 5101 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 5102 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 5103 E = lhsQID->qual_end(); I != E; ++I) { 5104 // when comparing an id<P> on lhs with a static type on rhs, 5105 // see if static class implements all of id's protocols, directly or 5106 // through its super class and categories. 5107 if (rhsID->ClassImplementsProtocol(*I, true)) { 5108 match = true; 5109 break; 5110 } 5111 } 5112 } 5113 if (!match) 5114 return false; 5115 } 5116 5117 return true; 5118 } 5119 5120 const ObjCObjectPointerType *rhsQID = rhs->getAsObjCQualifiedIdType(); 5121 assert(rhsQID && "One of the LHS/RHS should be id<x>"); 5122 5123 if (const ObjCObjectPointerType *lhsOPT = 5124 lhs->getAsObjCInterfacePointerType()) { 5125 // If both the right and left sides have qualifiers. 5126 for (ObjCObjectPointerType::qual_iterator I = lhsOPT->qual_begin(), 5127 E = lhsOPT->qual_end(); I != E; ++I) { 5128 ObjCProtocolDecl *lhsProto = *I; 5129 bool match = false; 5130 5131 // when comparing an id<P> on rhs with a static type on lhs, 5132 // see if static class implements all of id's protocols, directly or 5133 // through its super class and categories. 5134 // First, lhs protocols in the qualifier list must be found, direct 5135 // or indirect in rhs's qualifier list or it is a mismatch. 5136 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 5137 E = rhsQID->qual_end(); J != E; ++J) { 5138 ObjCProtocolDecl *rhsProto = *J; 5139 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 5140 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 5141 match = true; 5142 break; 5143 } 5144 } 5145 if (!match) 5146 return false; 5147 } 5148 5149 // Static class's protocols, or its super class or category protocols 5150 // must be found, direct or indirect in rhs's qualifier list or it is a mismatch. 5151 if (ObjCInterfaceDecl *lhsID = lhsOPT->getInterfaceDecl()) { 5152 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 5153 CollectInheritedProtocols(lhsID, LHSInheritedProtocols); 5154 // This is rather dubious but matches gcc's behavior. If lhs has 5155 // no type qualifier and its class has no static protocol(s) 5156 // assume that it is mismatch. 5157 if (LHSInheritedProtocols.empty() && lhsOPT->qual_empty()) 5158 return false; 5159 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 5160 LHSInheritedProtocols.begin(), 5161 E = LHSInheritedProtocols.end(); I != E; ++I) { 5162 bool match = false; 5163 ObjCProtocolDecl *lhsProto = (*I); 5164 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 5165 E = rhsQID->qual_end(); J != E; ++J) { 5166 ObjCProtocolDecl *rhsProto = *J; 5167 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 5168 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 5169 match = true; 5170 break; 5171 } 5172 } 5173 if (!match) 5174 return false; 5175 } 5176 } 5177 return true; 5178 } 5179 return false; 5180} 5181 5182/// canAssignObjCInterfaces - Return true if the two interface types are 5183/// compatible for assignment from RHS to LHS. This handles validation of any 5184/// protocol qualifiers on the LHS or RHS. 5185/// 5186bool ASTContext::canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 5187 const ObjCObjectPointerType *RHSOPT) { 5188 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 5189 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 5190 5191 // If either type represents the built-in 'id' or 'Class' types, return true. 5192 if (LHS->isObjCUnqualifiedIdOrClass() || 5193 RHS->isObjCUnqualifiedIdOrClass()) 5194 return true; 5195 5196 if (LHS->isObjCQualifiedId() || RHS->isObjCQualifiedId()) 5197 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 5198 QualType(RHSOPT,0), 5199 false); 5200 5201 if (LHS->isObjCQualifiedClass() && RHS->isObjCQualifiedClass()) 5202 return ObjCQualifiedClassTypesAreCompatible(QualType(LHSOPT,0), 5203 QualType(RHSOPT,0)); 5204 5205 // If we have 2 user-defined types, fall into that path. 5206 if (LHS->getInterface() && RHS->getInterface()) 5207 return canAssignObjCInterfaces(LHS, RHS); 5208 5209 return false; 5210} 5211 5212/// canAssignObjCInterfacesInBlockPointer - This routine is specifically written 5213/// for providing type-safety for objective-c pointers used to pass/return 5214/// arguments in block literals. When passed as arguments, passing 'A*' where 5215/// 'id' is expected is not OK. Passing 'Sub *" where 'Super *" is expected is 5216/// not OK. For the return type, the opposite is not OK. 5217bool ASTContext::canAssignObjCInterfacesInBlockPointer( 5218 const ObjCObjectPointerType *LHSOPT, 5219 const ObjCObjectPointerType *RHSOPT, 5220 bool BlockReturnType) { 5221 if (RHSOPT->isObjCBuiltinType() || LHSOPT->isObjCIdType()) 5222 return true; 5223 5224 if (LHSOPT->isObjCBuiltinType()) { 5225 return RHSOPT->isObjCBuiltinType() || RHSOPT->isObjCQualifiedIdType(); 5226 } 5227 5228 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 5229 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 5230 QualType(RHSOPT,0), 5231 false); 5232 5233 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 5234 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 5235 if (LHS && RHS) { // We have 2 user-defined types. 5236 if (LHS != RHS) { 5237 if (LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 5238 return BlockReturnType; 5239 if (RHS->getDecl()->isSuperClassOf(LHS->getDecl())) 5240 return !BlockReturnType; 5241 } 5242 else 5243 return true; 5244 } 5245 return false; 5246} 5247 5248/// getIntersectionOfProtocols - This routine finds the intersection of set 5249/// of protocols inherited from two distinct objective-c pointer objects. 5250/// It is used to build composite qualifier list of the composite type of 5251/// the conditional expression involving two objective-c pointer objects. 5252static 5253void getIntersectionOfProtocols(ASTContext &Context, 5254 const ObjCObjectPointerType *LHSOPT, 5255 const ObjCObjectPointerType *RHSOPT, 5256 SmallVectorImpl<ObjCProtocolDecl *> &IntersectionOfProtocols) { 5257 5258 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 5259 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 5260 assert(LHS->getInterface() && "LHS must have an interface base"); 5261 assert(RHS->getInterface() && "RHS must have an interface base"); 5262 5263 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> InheritedProtocolSet; 5264 unsigned LHSNumProtocols = LHS->getNumProtocols(); 5265 if (LHSNumProtocols > 0) 5266 InheritedProtocolSet.insert(LHS->qual_begin(), LHS->qual_end()); 5267 else { 5268 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 5269 Context.CollectInheritedProtocols(LHS->getInterface(), 5270 LHSInheritedProtocols); 5271 InheritedProtocolSet.insert(LHSInheritedProtocols.begin(), 5272 LHSInheritedProtocols.end()); 5273 } 5274 5275 unsigned RHSNumProtocols = RHS->getNumProtocols(); 5276 if (RHSNumProtocols > 0) { 5277 ObjCProtocolDecl **RHSProtocols = 5278 const_cast<ObjCProtocolDecl **>(RHS->qual_begin()); 5279 for (unsigned i = 0; i < RHSNumProtocols; ++i) 5280 if (InheritedProtocolSet.count(RHSProtocols[i])) 5281 IntersectionOfProtocols.push_back(RHSProtocols[i]); 5282 } else { 5283 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> RHSInheritedProtocols; 5284 Context.CollectInheritedProtocols(RHS->getInterface(), 5285 RHSInheritedProtocols); 5286 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 5287 RHSInheritedProtocols.begin(), 5288 E = RHSInheritedProtocols.end(); I != E; ++I) 5289 if (InheritedProtocolSet.count((*I))) 5290 IntersectionOfProtocols.push_back((*I)); 5291 } 5292} 5293 5294/// areCommonBaseCompatible - Returns common base class of the two classes if 5295/// one found. Note that this is O'2 algorithm. But it will be called as the 5296/// last type comparison in a ?-exp of ObjC pointer types before a 5297/// warning is issued. So, its invokation is extremely rare. 5298QualType ASTContext::areCommonBaseCompatible( 5299 const ObjCObjectPointerType *Lptr, 5300 const ObjCObjectPointerType *Rptr) { 5301 const ObjCObjectType *LHS = Lptr->getObjectType(); 5302 const ObjCObjectType *RHS = Rptr->getObjectType(); 5303 const ObjCInterfaceDecl* LDecl = LHS->getInterface(); 5304 const ObjCInterfaceDecl* RDecl = RHS->getInterface(); 5305 if (!LDecl || !RDecl || (LDecl == RDecl)) 5306 return QualType(); 5307 5308 do { 5309 LHS = cast<ObjCInterfaceType>(getObjCInterfaceType(LDecl)); 5310 if (canAssignObjCInterfaces(LHS, RHS)) { 5311 SmallVector<ObjCProtocolDecl *, 8> Protocols; 5312 getIntersectionOfProtocols(*this, Lptr, Rptr, Protocols); 5313 5314 QualType Result = QualType(LHS, 0); 5315 if (!Protocols.empty()) 5316 Result = getObjCObjectType(Result, Protocols.data(), Protocols.size()); 5317 Result = getObjCObjectPointerType(Result); 5318 return Result; 5319 } 5320 } while ((LDecl = LDecl->getSuperClass())); 5321 5322 return QualType(); 5323} 5324 5325bool ASTContext::canAssignObjCInterfaces(const ObjCObjectType *LHS, 5326 const ObjCObjectType *RHS) { 5327 assert(LHS->getInterface() && "LHS is not an interface type"); 5328 assert(RHS->getInterface() && "RHS is not an interface type"); 5329 5330 // Verify that the base decls are compatible: the RHS must be a subclass of 5331 // the LHS. 5332 if (!LHS->getInterface()->isSuperClassOf(RHS->getInterface())) 5333 return false; 5334 5335 // RHS must have a superset of the protocols in the LHS. If the LHS is not 5336 // protocol qualified at all, then we are good. 5337 if (LHS->getNumProtocols() == 0) 5338 return true; 5339 5340 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, 5341 // more detailed analysis is required. 5342 if (RHS->getNumProtocols() == 0) { 5343 // OK, if LHS is a superclass of RHS *and* 5344 // this superclass is assignment compatible with LHS. 5345 // false otherwise. 5346 bool IsSuperClass = 5347 LHS->getInterface()->isSuperClassOf(RHS->getInterface()); 5348 if (IsSuperClass) { 5349 // OK if conversion of LHS to SuperClass results in narrowing of types 5350 // ; i.e., SuperClass may implement at least one of the protocols 5351 // in LHS's protocol list. Example, SuperObj<P1> = lhs<P1,P2> is ok. 5352 // But not SuperObj<P1,P2,P3> = lhs<P1,P2>. 5353 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> SuperClassInheritedProtocols; 5354 CollectInheritedProtocols(RHS->getInterface(), SuperClassInheritedProtocols); 5355 // If super class has no protocols, it is not a match. 5356 if (SuperClassInheritedProtocols.empty()) 5357 return false; 5358 5359 for (ObjCObjectType::qual_iterator LHSPI = LHS->qual_begin(), 5360 LHSPE = LHS->qual_end(); 5361 LHSPI != LHSPE; LHSPI++) { 5362 bool SuperImplementsProtocol = false; 5363 ObjCProtocolDecl *LHSProto = (*LHSPI); 5364 5365 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 5366 SuperClassInheritedProtocols.begin(), 5367 E = SuperClassInheritedProtocols.end(); I != E; ++I) { 5368 ObjCProtocolDecl *SuperClassProto = (*I); 5369 if (SuperClassProto->lookupProtocolNamed(LHSProto->getIdentifier())) { 5370 SuperImplementsProtocol = true; 5371 break; 5372 } 5373 } 5374 if (!SuperImplementsProtocol) 5375 return false; 5376 } 5377 return true; 5378 } 5379 return false; 5380 } 5381 5382 for (ObjCObjectType::qual_iterator LHSPI = LHS->qual_begin(), 5383 LHSPE = LHS->qual_end(); 5384 LHSPI != LHSPE; LHSPI++) { 5385 bool RHSImplementsProtocol = false; 5386 5387 // If the RHS doesn't implement the protocol on the left, the types 5388 // are incompatible. 5389 for (ObjCObjectType::qual_iterator RHSPI = RHS->qual_begin(), 5390 RHSPE = RHS->qual_end(); 5391 RHSPI != RHSPE; RHSPI++) { 5392 if ((*RHSPI)->lookupProtocolNamed((*LHSPI)->getIdentifier())) { 5393 RHSImplementsProtocol = true; 5394 break; 5395 } 5396 } 5397 // FIXME: For better diagnostics, consider passing back the protocol name. 5398 if (!RHSImplementsProtocol) 5399 return false; 5400 } 5401 // The RHS implements all protocols listed on the LHS. 5402 return true; 5403} 5404 5405bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) { 5406 // get the "pointed to" types 5407 const ObjCObjectPointerType *LHSOPT = LHS->getAs<ObjCObjectPointerType>(); 5408 const ObjCObjectPointerType *RHSOPT = RHS->getAs<ObjCObjectPointerType>(); 5409 5410 if (!LHSOPT || !RHSOPT) 5411 return false; 5412 5413 return canAssignObjCInterfaces(LHSOPT, RHSOPT) || 5414 canAssignObjCInterfaces(RHSOPT, LHSOPT); 5415} 5416 5417bool ASTContext::canBindObjCObjectType(QualType To, QualType From) { 5418 return canAssignObjCInterfaces( 5419 getObjCObjectPointerType(To)->getAs<ObjCObjectPointerType>(), 5420 getObjCObjectPointerType(From)->getAs<ObjCObjectPointerType>()); 5421} 5422 5423/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible, 5424/// both shall have the identically qualified version of a compatible type. 5425/// C99 6.2.7p1: Two types have compatible types if their types are the 5426/// same. See 6.7.[2,3,5] for additional rules. 5427bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS, 5428 bool CompareUnqualified) { 5429 if (getLangOptions().CPlusPlus) 5430 return hasSameType(LHS, RHS); 5431 5432 return !mergeTypes(LHS, RHS, false, CompareUnqualified).isNull(); 5433} 5434 5435bool ASTContext::propertyTypesAreCompatible(QualType LHS, QualType RHS) { 5436 return typesAreCompatible(LHS, RHS); 5437} 5438 5439bool ASTContext::typesAreBlockPointerCompatible(QualType LHS, QualType RHS) { 5440 return !mergeTypes(LHS, RHS, true).isNull(); 5441} 5442 5443/// mergeTransparentUnionType - if T is a transparent union type and a member 5444/// of T is compatible with SubType, return the merged type, else return 5445/// QualType() 5446QualType ASTContext::mergeTransparentUnionType(QualType T, QualType SubType, 5447 bool OfBlockPointer, 5448 bool Unqualified) { 5449 if (const RecordType *UT = T->getAsUnionType()) { 5450 RecordDecl *UD = UT->getDecl(); 5451 if (UD->hasAttr<TransparentUnionAttr>()) { 5452 for (RecordDecl::field_iterator it = UD->field_begin(), 5453 itend = UD->field_end(); it != itend; ++it) { 5454 QualType ET = it->getType().getUnqualifiedType(); 5455 QualType MT = mergeTypes(ET, SubType, OfBlockPointer, Unqualified); 5456 if (!MT.isNull()) 5457 return MT; 5458 } 5459 } 5460 } 5461 5462 return QualType(); 5463} 5464 5465/// mergeFunctionArgumentTypes - merge two types which appear as function 5466/// argument types 5467QualType ASTContext::mergeFunctionArgumentTypes(QualType lhs, QualType rhs, 5468 bool OfBlockPointer, 5469 bool Unqualified) { 5470 // GNU extension: two types are compatible if they appear as a function 5471 // argument, one of the types is a transparent union type and the other 5472 // type is compatible with a union member 5473 QualType lmerge = mergeTransparentUnionType(lhs, rhs, OfBlockPointer, 5474 Unqualified); 5475 if (!lmerge.isNull()) 5476 return lmerge; 5477 5478 QualType rmerge = mergeTransparentUnionType(rhs, lhs, OfBlockPointer, 5479 Unqualified); 5480 if (!rmerge.isNull()) 5481 return rmerge; 5482 5483 return mergeTypes(lhs, rhs, OfBlockPointer, Unqualified); 5484} 5485 5486QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs, 5487 bool OfBlockPointer, 5488 bool Unqualified) { 5489 const FunctionType *lbase = lhs->getAs<FunctionType>(); 5490 const FunctionType *rbase = rhs->getAs<FunctionType>(); 5491 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 5492 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 5493 bool allLTypes = true; 5494 bool allRTypes = true; 5495 5496 // Check return type 5497 QualType retType; 5498 if (OfBlockPointer) { 5499 QualType RHS = rbase->getResultType(); 5500 QualType LHS = lbase->getResultType(); 5501 bool UnqualifiedResult = Unqualified; 5502 if (!UnqualifiedResult) 5503 UnqualifiedResult = (!RHS.hasQualifiers() && LHS.hasQualifiers()); 5504 retType = mergeTypes(LHS, RHS, true, UnqualifiedResult, true); 5505 } 5506 else 5507 retType = mergeTypes(lbase->getResultType(), rbase->getResultType(), false, 5508 Unqualified); 5509 if (retType.isNull()) return QualType(); 5510 5511 if (Unqualified) 5512 retType = retType.getUnqualifiedType(); 5513 5514 CanQualType LRetType = getCanonicalType(lbase->getResultType()); 5515 CanQualType RRetType = getCanonicalType(rbase->getResultType()); 5516 if (Unqualified) { 5517 LRetType = LRetType.getUnqualifiedType(); 5518 RRetType = RRetType.getUnqualifiedType(); 5519 } 5520 5521 if (getCanonicalType(retType) != LRetType) 5522 allLTypes = false; 5523 if (getCanonicalType(retType) != RRetType) 5524 allRTypes = false; 5525 5526 // FIXME: double check this 5527 // FIXME: should we error if lbase->getRegParmAttr() != 0 && 5528 // rbase->getRegParmAttr() != 0 && 5529 // lbase->getRegParmAttr() != rbase->getRegParmAttr()? 5530 FunctionType::ExtInfo lbaseInfo = lbase->getExtInfo(); 5531 FunctionType::ExtInfo rbaseInfo = rbase->getExtInfo(); 5532 5533 // Compatible functions must have compatible calling conventions 5534 if (!isSameCallConv(lbaseInfo.getCC(), rbaseInfo.getCC())) 5535 return QualType(); 5536 5537 // Regparm is part of the calling convention. 5538 if (lbaseInfo.getHasRegParm() != rbaseInfo.getHasRegParm()) 5539 return QualType(); 5540 if (lbaseInfo.getRegParm() != rbaseInfo.getRegParm()) 5541 return QualType(); 5542 5543 if (lbaseInfo.getProducesResult() != rbaseInfo.getProducesResult()) 5544 return QualType(); 5545 5546 // It's noreturn if either type is. 5547 // FIXME: some uses, e.g. conditional exprs, really want this to be 'both'. 5548 bool NoReturn = lbaseInfo.getNoReturn() || rbaseInfo.getNoReturn(); 5549 if (NoReturn != lbaseInfo.getNoReturn()) 5550 allLTypes = false; 5551 if (NoReturn != rbaseInfo.getNoReturn()) 5552 allRTypes = false; 5553 5554 FunctionType::ExtInfo einfo = lbaseInfo.withNoReturn(NoReturn); 5555 5556 if (lproto && rproto) { // two C99 style function prototypes 5557 assert(!lproto->hasExceptionSpec() && !rproto->hasExceptionSpec() && 5558 "C++ shouldn't be here"); 5559 unsigned lproto_nargs = lproto->getNumArgs(); 5560 unsigned rproto_nargs = rproto->getNumArgs(); 5561 5562 // Compatible functions must have the same number of arguments 5563 if (lproto_nargs != rproto_nargs) 5564 return QualType(); 5565 5566 // Variadic and non-variadic functions aren't compatible 5567 if (lproto->isVariadic() != rproto->isVariadic()) 5568 return QualType(); 5569 5570 if (lproto->getTypeQuals() != rproto->getTypeQuals()) 5571 return QualType(); 5572 5573 if (LangOpts.ObjCAutoRefCount && 5574 !FunctionTypesMatchOnNSConsumedAttrs(rproto, lproto)) 5575 return QualType(); 5576 5577 // Check argument compatibility 5578 SmallVector<QualType, 10> types; 5579 for (unsigned i = 0; i < lproto_nargs; i++) { 5580 QualType largtype = lproto->getArgType(i).getUnqualifiedType(); 5581 QualType rargtype = rproto->getArgType(i).getUnqualifiedType(); 5582 QualType argtype = mergeFunctionArgumentTypes(largtype, rargtype, 5583 OfBlockPointer, 5584 Unqualified); 5585 if (argtype.isNull()) return QualType(); 5586 5587 if (Unqualified) 5588 argtype = argtype.getUnqualifiedType(); 5589 5590 types.push_back(argtype); 5591 if (Unqualified) { 5592 largtype = largtype.getUnqualifiedType(); 5593 rargtype = rargtype.getUnqualifiedType(); 5594 } 5595 5596 if (getCanonicalType(argtype) != getCanonicalType(largtype)) 5597 allLTypes = false; 5598 if (getCanonicalType(argtype) != getCanonicalType(rargtype)) 5599 allRTypes = false; 5600 } 5601 5602 if (allLTypes) return lhs; 5603 if (allRTypes) return rhs; 5604 5605 FunctionProtoType::ExtProtoInfo EPI = lproto->getExtProtoInfo(); 5606 EPI.ExtInfo = einfo; 5607 return getFunctionType(retType, types.begin(), types.size(), EPI); 5608 } 5609 5610 if (lproto) allRTypes = false; 5611 if (rproto) allLTypes = false; 5612 5613 const FunctionProtoType *proto = lproto ? lproto : rproto; 5614 if (proto) { 5615 assert(!proto->hasExceptionSpec() && "C++ shouldn't be here"); 5616 if (proto->isVariadic()) return QualType(); 5617 // Check that the types are compatible with the types that 5618 // would result from default argument promotions (C99 6.7.5.3p15). 5619 // The only types actually affected are promotable integer 5620 // types and floats, which would be passed as a different 5621 // type depending on whether the prototype is visible. 5622 unsigned proto_nargs = proto->getNumArgs(); 5623 for (unsigned i = 0; i < proto_nargs; ++i) { 5624 QualType argTy = proto->getArgType(i); 5625 5626 // Look at the promotion type of enum types, since that is the type used 5627 // to pass enum values. 5628 if (const EnumType *Enum = argTy->getAs<EnumType>()) 5629 argTy = Enum->getDecl()->getPromotionType(); 5630 5631 if (argTy->isPromotableIntegerType() || 5632 getCanonicalType(argTy).getUnqualifiedType() == FloatTy) 5633 return QualType(); 5634 } 5635 5636 if (allLTypes) return lhs; 5637 if (allRTypes) return rhs; 5638 5639 FunctionProtoType::ExtProtoInfo EPI = proto->getExtProtoInfo(); 5640 EPI.ExtInfo = einfo; 5641 return getFunctionType(retType, proto->arg_type_begin(), 5642 proto->getNumArgs(), EPI); 5643 } 5644 5645 if (allLTypes) return lhs; 5646 if (allRTypes) return rhs; 5647 return getFunctionNoProtoType(retType, einfo); 5648} 5649 5650QualType ASTContext::mergeTypes(QualType LHS, QualType RHS, 5651 bool OfBlockPointer, 5652 bool Unqualified, bool BlockReturnType) { 5653 // C++ [expr]: If an expression initially has the type "reference to T", the 5654 // type is adjusted to "T" prior to any further analysis, the expression 5655 // designates the object or function denoted by the reference, and the 5656 // expression is an lvalue unless the reference is an rvalue reference and 5657 // the expression is a function call (possibly inside parentheses). 5658 assert(!LHS->getAs<ReferenceType>() && "LHS is a reference type?"); 5659 assert(!RHS->getAs<ReferenceType>() && "RHS is a reference type?"); 5660 5661 if (Unqualified) { 5662 LHS = LHS.getUnqualifiedType(); 5663 RHS = RHS.getUnqualifiedType(); 5664 } 5665 5666 QualType LHSCan = getCanonicalType(LHS), 5667 RHSCan = getCanonicalType(RHS); 5668 5669 // If two types are identical, they are compatible. 5670 if (LHSCan == RHSCan) 5671 return LHS; 5672 5673 // If the qualifiers are different, the types aren't compatible... mostly. 5674 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 5675 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 5676 if (LQuals != RQuals) { 5677 // If any of these qualifiers are different, we have a type 5678 // mismatch. 5679 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 5680 LQuals.getAddressSpace() != RQuals.getAddressSpace() || 5681 LQuals.getObjCLifetime() != RQuals.getObjCLifetime()) 5682 return QualType(); 5683 5684 // Exactly one GC qualifier difference is allowed: __strong is 5685 // okay if the other type has no GC qualifier but is an Objective 5686 // C object pointer (i.e. implicitly strong by default). We fix 5687 // this by pretending that the unqualified type was actually 5688 // qualified __strong. 5689 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 5690 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 5691 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 5692 5693 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 5694 return QualType(); 5695 5696 if (GC_L == Qualifiers::Strong && RHSCan->isObjCObjectPointerType()) { 5697 return mergeTypes(LHS, getObjCGCQualType(RHS, Qualifiers::Strong)); 5698 } 5699 if (GC_R == Qualifiers::Strong && LHSCan->isObjCObjectPointerType()) { 5700 return mergeTypes(getObjCGCQualType(LHS, Qualifiers::Strong), RHS); 5701 } 5702 return QualType(); 5703 } 5704 5705 // Okay, qualifiers are equal. 5706 5707 Type::TypeClass LHSClass = LHSCan->getTypeClass(); 5708 Type::TypeClass RHSClass = RHSCan->getTypeClass(); 5709 5710 // We want to consider the two function types to be the same for these 5711 // comparisons, just force one to the other. 5712 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto; 5713 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto; 5714 5715 // Same as above for arrays 5716 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray) 5717 LHSClass = Type::ConstantArray; 5718 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray) 5719 RHSClass = Type::ConstantArray; 5720 5721 // ObjCInterfaces are just specialized ObjCObjects. 5722 if (LHSClass == Type::ObjCInterface) LHSClass = Type::ObjCObject; 5723 if (RHSClass == Type::ObjCInterface) RHSClass = Type::ObjCObject; 5724 5725 // Canonicalize ExtVector -> Vector. 5726 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector; 5727 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector; 5728 5729 // If the canonical type classes don't match. 5730 if (LHSClass != RHSClass) { 5731 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char, 5732 // a signed integer type, or an unsigned integer type. 5733 // Compatibility is based on the underlying type, not the promotion 5734 // type. 5735 if (const EnumType* ETy = LHS->getAs<EnumType>()) { 5736 if (ETy->getDecl()->getIntegerType() == RHSCan.getUnqualifiedType()) 5737 return RHS; 5738 } 5739 if (const EnumType* ETy = RHS->getAs<EnumType>()) { 5740 if (ETy->getDecl()->getIntegerType() == LHSCan.getUnqualifiedType()) 5741 return LHS; 5742 } 5743 5744 return QualType(); 5745 } 5746 5747 // The canonical type classes match. 5748 switch (LHSClass) { 5749#define TYPE(Class, Base) 5750#define ABSTRACT_TYPE(Class, Base) 5751#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) case Type::Class: 5752#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 5753#define DEPENDENT_TYPE(Class, Base) case Type::Class: 5754#include "clang/AST/TypeNodes.def" 5755 llvm_unreachable("Non-canonical and dependent types shouldn't get here"); 5756 5757 case Type::LValueReference: 5758 case Type::RValueReference: 5759 case Type::MemberPointer: 5760 llvm_unreachable("C++ should never be in mergeTypes"); 5761 5762 case Type::ObjCInterface: 5763 case Type::IncompleteArray: 5764 case Type::VariableArray: 5765 case Type::FunctionProto: 5766 case Type::ExtVector: 5767 llvm_unreachable("Types are eliminated above"); 5768 5769 case Type::Pointer: 5770 { 5771 // Merge two pointer types, while trying to preserve typedef info 5772 QualType LHSPointee = LHS->getAs<PointerType>()->getPointeeType(); 5773 QualType RHSPointee = RHS->getAs<PointerType>()->getPointeeType(); 5774 if (Unqualified) { 5775 LHSPointee = LHSPointee.getUnqualifiedType(); 5776 RHSPointee = RHSPointee.getUnqualifiedType(); 5777 } 5778 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, false, 5779 Unqualified); 5780 if (ResultType.isNull()) return QualType(); 5781 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 5782 return LHS; 5783 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 5784 return RHS; 5785 return getPointerType(ResultType); 5786 } 5787 case Type::BlockPointer: 5788 { 5789 // Merge two block pointer types, while trying to preserve typedef info 5790 QualType LHSPointee = LHS->getAs<BlockPointerType>()->getPointeeType(); 5791 QualType RHSPointee = RHS->getAs<BlockPointerType>()->getPointeeType(); 5792 if (Unqualified) { 5793 LHSPointee = LHSPointee.getUnqualifiedType(); 5794 RHSPointee = RHSPointee.getUnqualifiedType(); 5795 } 5796 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, OfBlockPointer, 5797 Unqualified); 5798 if (ResultType.isNull()) return QualType(); 5799 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 5800 return LHS; 5801 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 5802 return RHS; 5803 return getBlockPointerType(ResultType); 5804 } 5805 case Type::ConstantArray: 5806 { 5807 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS); 5808 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS); 5809 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize()) 5810 return QualType(); 5811 5812 QualType LHSElem = getAsArrayType(LHS)->getElementType(); 5813 QualType RHSElem = getAsArrayType(RHS)->getElementType(); 5814 if (Unqualified) { 5815 LHSElem = LHSElem.getUnqualifiedType(); 5816 RHSElem = RHSElem.getUnqualifiedType(); 5817 } 5818 5819 QualType ResultType = mergeTypes(LHSElem, RHSElem, false, Unqualified); 5820 if (ResultType.isNull()) return QualType(); 5821 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 5822 return LHS; 5823 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 5824 return RHS; 5825 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(), 5826 ArrayType::ArraySizeModifier(), 0); 5827 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(), 5828 ArrayType::ArraySizeModifier(), 0); 5829 const VariableArrayType* LVAT = getAsVariableArrayType(LHS); 5830 const VariableArrayType* RVAT = getAsVariableArrayType(RHS); 5831 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 5832 return LHS; 5833 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 5834 return RHS; 5835 if (LVAT) { 5836 // FIXME: This isn't correct! But tricky to implement because 5837 // the array's size has to be the size of LHS, but the type 5838 // has to be different. 5839 return LHS; 5840 } 5841 if (RVAT) { 5842 // FIXME: This isn't correct! But tricky to implement because 5843 // the array's size has to be the size of RHS, but the type 5844 // has to be different. 5845 return RHS; 5846 } 5847 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS; 5848 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS; 5849 return getIncompleteArrayType(ResultType, 5850 ArrayType::ArraySizeModifier(), 0); 5851 } 5852 case Type::FunctionNoProto: 5853 return mergeFunctionTypes(LHS, RHS, OfBlockPointer, Unqualified); 5854 case Type::Record: 5855 case Type::Enum: 5856 return QualType(); 5857 case Type::Builtin: 5858 // Only exactly equal builtin types are compatible, which is tested above. 5859 return QualType(); 5860 case Type::Complex: 5861 // Distinct complex types are incompatible. 5862 return QualType(); 5863 case Type::Vector: 5864 // FIXME: The merged type should be an ExtVector! 5865 if (areCompatVectorTypes(LHSCan->getAs<VectorType>(), 5866 RHSCan->getAs<VectorType>())) 5867 return LHS; 5868 return QualType(); 5869 case Type::ObjCObject: { 5870 // Check if the types are assignment compatible. 5871 // FIXME: This should be type compatibility, e.g. whether 5872 // "LHS x; RHS x;" at global scope is legal. 5873 const ObjCObjectType* LHSIface = LHS->getAs<ObjCObjectType>(); 5874 const ObjCObjectType* RHSIface = RHS->getAs<ObjCObjectType>(); 5875 if (canAssignObjCInterfaces(LHSIface, RHSIface)) 5876 return LHS; 5877 5878 return QualType(); 5879 } 5880 case Type::ObjCObjectPointer: { 5881 if (OfBlockPointer) { 5882 if (canAssignObjCInterfacesInBlockPointer( 5883 LHS->getAs<ObjCObjectPointerType>(), 5884 RHS->getAs<ObjCObjectPointerType>(), 5885 BlockReturnType)) 5886 return LHS; 5887 return QualType(); 5888 } 5889 if (canAssignObjCInterfaces(LHS->getAs<ObjCObjectPointerType>(), 5890 RHS->getAs<ObjCObjectPointerType>())) 5891 return LHS; 5892 5893 return QualType(); 5894 } 5895 } 5896 5897 return QualType(); 5898} 5899 5900bool ASTContext::FunctionTypesMatchOnNSConsumedAttrs( 5901 const FunctionProtoType *FromFunctionType, 5902 const FunctionProtoType *ToFunctionType) { 5903 if (FromFunctionType->hasAnyConsumedArgs() != 5904 ToFunctionType->hasAnyConsumedArgs()) 5905 return false; 5906 FunctionProtoType::ExtProtoInfo FromEPI = 5907 FromFunctionType->getExtProtoInfo(); 5908 FunctionProtoType::ExtProtoInfo ToEPI = 5909 ToFunctionType->getExtProtoInfo(); 5910 if (FromEPI.ConsumedArguments && ToEPI.ConsumedArguments) 5911 for (unsigned ArgIdx = 0, NumArgs = FromFunctionType->getNumArgs(); 5912 ArgIdx != NumArgs; ++ArgIdx) { 5913 if (FromEPI.ConsumedArguments[ArgIdx] != 5914 ToEPI.ConsumedArguments[ArgIdx]) 5915 return false; 5916 } 5917 return true; 5918} 5919 5920/// mergeObjCGCQualifiers - This routine merges ObjC's GC attribute of 'LHS' and 5921/// 'RHS' attributes and returns the merged version; including for function 5922/// return types. 5923QualType ASTContext::mergeObjCGCQualifiers(QualType LHS, QualType RHS) { 5924 QualType LHSCan = getCanonicalType(LHS), 5925 RHSCan = getCanonicalType(RHS); 5926 // If two types are identical, they are compatible. 5927 if (LHSCan == RHSCan) 5928 return LHS; 5929 if (RHSCan->isFunctionType()) { 5930 if (!LHSCan->isFunctionType()) 5931 return QualType(); 5932 QualType OldReturnType = 5933 cast<FunctionType>(RHSCan.getTypePtr())->getResultType(); 5934 QualType NewReturnType = 5935 cast<FunctionType>(LHSCan.getTypePtr())->getResultType(); 5936 QualType ResReturnType = 5937 mergeObjCGCQualifiers(NewReturnType, OldReturnType); 5938 if (ResReturnType.isNull()) 5939 return QualType(); 5940 if (ResReturnType == NewReturnType || ResReturnType == OldReturnType) { 5941 // id foo(); ... __strong id foo(); or: __strong id foo(); ... id foo(); 5942 // In either case, use OldReturnType to build the new function type. 5943 const FunctionType *F = LHS->getAs<FunctionType>(); 5944 if (const FunctionProtoType *FPT = cast<FunctionProtoType>(F)) { 5945 FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); 5946 EPI.ExtInfo = getFunctionExtInfo(LHS); 5947 QualType ResultType 5948 = getFunctionType(OldReturnType, FPT->arg_type_begin(), 5949 FPT->getNumArgs(), EPI); 5950 return ResultType; 5951 } 5952 } 5953 return QualType(); 5954 } 5955 5956 // If the qualifiers are different, the types can still be merged. 5957 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 5958 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 5959 if (LQuals != RQuals) { 5960 // If any of these qualifiers are different, we have a type mismatch. 5961 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 5962 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 5963 return QualType(); 5964 5965 // Exactly one GC qualifier difference is allowed: __strong is 5966 // okay if the other type has no GC qualifier but is an Objective 5967 // C object pointer (i.e. implicitly strong by default). We fix 5968 // this by pretending that the unqualified type was actually 5969 // qualified __strong. 5970 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 5971 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 5972 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 5973 5974 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 5975 return QualType(); 5976 5977 if (GC_L == Qualifiers::Strong) 5978 return LHS; 5979 if (GC_R == Qualifiers::Strong) 5980 return RHS; 5981 return QualType(); 5982 } 5983 5984 if (LHSCan->isObjCObjectPointerType() && RHSCan->isObjCObjectPointerType()) { 5985 QualType LHSBaseQT = LHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 5986 QualType RHSBaseQT = RHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 5987 QualType ResQT = mergeObjCGCQualifiers(LHSBaseQT, RHSBaseQT); 5988 if (ResQT == LHSBaseQT) 5989 return LHS; 5990 if (ResQT == RHSBaseQT) 5991 return RHS; 5992 } 5993 return QualType(); 5994} 5995 5996//===----------------------------------------------------------------------===// 5997// Integer Predicates 5998//===----------------------------------------------------------------------===// 5999 6000unsigned ASTContext::getIntWidth(QualType T) const { 6001 if (const EnumType *ET = dyn_cast<EnumType>(T)) 6002 T = ET->getDecl()->getIntegerType(); 6003 if (T->isBooleanType()) 6004 return 1; 6005 // For builtin types, just use the standard type sizing method 6006 return (unsigned)getTypeSize(T); 6007} 6008 6009QualType ASTContext::getCorrespondingUnsignedType(QualType T) { 6010 assert(T->hasSignedIntegerRepresentation() && "Unexpected type"); 6011 6012 // Turn <4 x signed int> -> <4 x unsigned int> 6013 if (const VectorType *VTy = T->getAs<VectorType>()) 6014 return getVectorType(getCorrespondingUnsignedType(VTy->getElementType()), 6015 VTy->getNumElements(), VTy->getVectorKind()); 6016 6017 // For enums, we return the unsigned version of the base type. 6018 if (const EnumType *ETy = T->getAs<EnumType>()) 6019 T = ETy->getDecl()->getIntegerType(); 6020 6021 const BuiltinType *BTy = T->getAs<BuiltinType>(); 6022 assert(BTy && "Unexpected signed integer type"); 6023 switch (BTy->getKind()) { 6024 case BuiltinType::Char_S: 6025 case BuiltinType::SChar: 6026 return UnsignedCharTy; 6027 case BuiltinType::Short: 6028 return UnsignedShortTy; 6029 case BuiltinType::Int: 6030 return UnsignedIntTy; 6031 case BuiltinType::Long: 6032 return UnsignedLongTy; 6033 case BuiltinType::LongLong: 6034 return UnsignedLongLongTy; 6035 case BuiltinType::Int128: 6036 return UnsignedInt128Ty; 6037 default: 6038 llvm_unreachable("Unexpected signed integer type"); 6039 } 6040} 6041 6042ASTMutationListener::~ASTMutationListener() { } 6043 6044 6045//===----------------------------------------------------------------------===// 6046// Builtin Type Computation 6047//===----------------------------------------------------------------------===// 6048 6049/// DecodeTypeFromStr - This decodes one type descriptor from Str, advancing the 6050/// pointer over the consumed characters. This returns the resultant type. If 6051/// AllowTypeModifiers is false then modifier like * are not parsed, just basic 6052/// types. This allows "v2i*" to be parsed as a pointer to a v2i instead of 6053/// a vector of "i*". 6054/// 6055/// RequiresICE is filled in on return to indicate whether the value is required 6056/// to be an Integer Constant Expression. 6057static QualType DecodeTypeFromStr(const char *&Str, const ASTContext &Context, 6058 ASTContext::GetBuiltinTypeError &Error, 6059 bool &RequiresICE, 6060 bool AllowTypeModifiers) { 6061 // Modifiers. 6062 int HowLong = 0; 6063 bool Signed = false, Unsigned = false; 6064 RequiresICE = false; 6065 6066 // Read the prefixed modifiers first. 6067 bool Done = false; 6068 while (!Done) { 6069 switch (*Str++) { 6070 default: Done = true; --Str; break; 6071 case 'I': 6072 RequiresICE = true; 6073 break; 6074 case 'S': 6075 assert(!Unsigned && "Can't use both 'S' and 'U' modifiers!"); 6076 assert(!Signed && "Can't use 'S' modifier multiple times!"); 6077 Signed = true; 6078 break; 6079 case 'U': 6080 assert(!Signed && "Can't use both 'S' and 'U' modifiers!"); 6081 assert(!Unsigned && "Can't use 'S' modifier multiple times!"); 6082 Unsigned = true; 6083 break; 6084 case 'L': 6085 assert(HowLong <= 2 && "Can't have LLLL modifier"); 6086 ++HowLong; 6087 break; 6088 } 6089 } 6090 6091 QualType Type; 6092 6093 // Read the base type. 6094 switch (*Str++) { 6095 default: llvm_unreachable("Unknown builtin type letter!"); 6096 case 'v': 6097 assert(HowLong == 0 && !Signed && !Unsigned && 6098 "Bad modifiers used with 'v'!"); 6099 Type = Context.VoidTy; 6100 break; 6101 case 'f': 6102 assert(HowLong == 0 && !Signed && !Unsigned && 6103 "Bad modifiers used with 'f'!"); 6104 Type = Context.FloatTy; 6105 break; 6106 case 'd': 6107 assert(HowLong < 2 && !Signed && !Unsigned && 6108 "Bad modifiers used with 'd'!"); 6109 if (HowLong) 6110 Type = Context.LongDoubleTy; 6111 else 6112 Type = Context.DoubleTy; 6113 break; 6114 case 's': 6115 assert(HowLong == 0 && "Bad modifiers used with 's'!"); 6116 if (Unsigned) 6117 Type = Context.UnsignedShortTy; 6118 else 6119 Type = Context.ShortTy; 6120 break; 6121 case 'i': 6122 if (HowLong == 3) 6123 Type = Unsigned ? Context.UnsignedInt128Ty : Context.Int128Ty; 6124 else if (HowLong == 2) 6125 Type = Unsigned ? Context.UnsignedLongLongTy : Context.LongLongTy; 6126 else if (HowLong == 1) 6127 Type = Unsigned ? Context.UnsignedLongTy : Context.LongTy; 6128 else 6129 Type = Unsigned ? Context.UnsignedIntTy : Context.IntTy; 6130 break; 6131 case 'c': 6132 assert(HowLong == 0 && "Bad modifiers used with 'c'!"); 6133 if (Signed) 6134 Type = Context.SignedCharTy; 6135 else if (Unsigned) 6136 Type = Context.UnsignedCharTy; 6137 else 6138 Type = Context.CharTy; 6139 break; 6140 case 'b': // boolean 6141 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'b'!"); 6142 Type = Context.BoolTy; 6143 break; 6144 case 'z': // size_t. 6145 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'z'!"); 6146 Type = Context.getSizeType(); 6147 break; 6148 case 'F': 6149 Type = Context.getCFConstantStringType(); 6150 break; 6151 case 'G': 6152 Type = Context.getObjCIdType(); 6153 break; 6154 case 'H': 6155 Type = Context.getObjCSelType(); 6156 break; 6157 case 'a': 6158 Type = Context.getBuiltinVaListType(); 6159 assert(!Type.isNull() && "builtin va list type not initialized!"); 6160 break; 6161 case 'A': 6162 // This is a "reference" to a va_list; however, what exactly 6163 // this means depends on how va_list is defined. There are two 6164 // different kinds of va_list: ones passed by value, and ones 6165 // passed by reference. An example of a by-value va_list is 6166 // x86, where va_list is a char*. An example of by-ref va_list 6167 // is x86-64, where va_list is a __va_list_tag[1]. For x86, 6168 // we want this argument to be a char*&; for x86-64, we want 6169 // it to be a __va_list_tag*. 6170 Type = Context.getBuiltinVaListType(); 6171 assert(!Type.isNull() && "builtin va list type not initialized!"); 6172 if (Type->isArrayType()) 6173 Type = Context.getArrayDecayedType(Type); 6174 else 6175 Type = Context.getLValueReferenceType(Type); 6176 break; 6177 case 'V': { 6178 char *End; 6179 unsigned NumElements = strtoul(Str, &End, 10); 6180 assert(End != Str && "Missing vector size"); 6181 Str = End; 6182 6183 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, 6184 RequiresICE, false); 6185 assert(!RequiresICE && "Can't require vector ICE"); 6186 6187 // TODO: No way to make AltiVec vectors in builtins yet. 6188 Type = Context.getVectorType(ElementType, NumElements, 6189 VectorType::GenericVector); 6190 break; 6191 } 6192 case 'X': { 6193 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, RequiresICE, 6194 false); 6195 assert(!RequiresICE && "Can't require complex ICE"); 6196 Type = Context.getComplexType(ElementType); 6197 break; 6198 } 6199 case 'Y' : { 6200 Type = Context.getPointerDiffType(); 6201 break; 6202 } 6203 case 'P': 6204 Type = Context.getFILEType(); 6205 if (Type.isNull()) { 6206 Error = ASTContext::GE_Missing_stdio; 6207 return QualType(); 6208 } 6209 break; 6210 case 'J': 6211 if (Signed) 6212 Type = Context.getsigjmp_bufType(); 6213 else 6214 Type = Context.getjmp_bufType(); 6215 6216 if (Type.isNull()) { 6217 Error = ASTContext::GE_Missing_setjmp; 6218 return QualType(); 6219 } 6220 break; 6221 } 6222 6223 // If there are modifiers and if we're allowed to parse them, go for it. 6224 Done = !AllowTypeModifiers; 6225 while (!Done) { 6226 switch (char c = *Str++) { 6227 default: Done = true; --Str; break; 6228 case '*': 6229 case '&': { 6230 // Both pointers and references can have their pointee types 6231 // qualified with an address space. 6232 char *End; 6233 unsigned AddrSpace = strtoul(Str, &End, 10); 6234 if (End != Str && AddrSpace != 0) { 6235 Type = Context.getAddrSpaceQualType(Type, AddrSpace); 6236 Str = End; 6237 } 6238 if (c == '*') 6239 Type = Context.getPointerType(Type); 6240 else 6241 Type = Context.getLValueReferenceType(Type); 6242 break; 6243 } 6244 // FIXME: There's no way to have a built-in with an rvalue ref arg. 6245 case 'C': 6246 Type = Type.withConst(); 6247 break; 6248 case 'D': 6249 Type = Context.getVolatileType(Type); 6250 break; 6251 } 6252 } 6253 6254 assert((!RequiresICE || Type->isIntegralOrEnumerationType()) && 6255 "Integer constant 'I' type must be an integer"); 6256 6257 return Type; 6258} 6259 6260/// GetBuiltinType - Return the type for the specified builtin. 6261QualType ASTContext::GetBuiltinType(unsigned Id, 6262 GetBuiltinTypeError &Error, 6263 unsigned *IntegerConstantArgs) const { 6264 const char *TypeStr = BuiltinInfo.GetTypeString(Id); 6265 6266 SmallVector<QualType, 8> ArgTypes; 6267 6268 bool RequiresICE = false; 6269 Error = GE_None; 6270 QualType ResType = DecodeTypeFromStr(TypeStr, *this, Error, 6271 RequiresICE, true); 6272 if (Error != GE_None) 6273 return QualType(); 6274 6275 assert(!RequiresICE && "Result of intrinsic cannot be required to be an ICE"); 6276 6277 while (TypeStr[0] && TypeStr[0] != '.') { 6278 QualType Ty = DecodeTypeFromStr(TypeStr, *this, Error, RequiresICE, true); 6279 if (Error != GE_None) 6280 return QualType(); 6281 6282 // If this argument is required to be an IntegerConstantExpression and the 6283 // caller cares, fill in the bitmask we return. 6284 if (RequiresICE && IntegerConstantArgs) 6285 *IntegerConstantArgs |= 1 << ArgTypes.size(); 6286 6287 // Do array -> pointer decay. The builtin should use the decayed type. 6288 if (Ty->isArrayType()) 6289 Ty = getArrayDecayedType(Ty); 6290 6291 ArgTypes.push_back(Ty); 6292 } 6293 6294 assert((TypeStr[0] != '.' || TypeStr[1] == 0) && 6295 "'.' should only occur at end of builtin type list!"); 6296 6297 FunctionType::ExtInfo EI; 6298 if (BuiltinInfo.isNoReturn(Id)) EI = EI.withNoReturn(true); 6299 6300 bool Variadic = (TypeStr[0] == '.'); 6301 6302 // We really shouldn't be making a no-proto type here, especially in C++. 6303 if (ArgTypes.empty() && Variadic) 6304 return getFunctionNoProtoType(ResType, EI); 6305 6306 FunctionProtoType::ExtProtoInfo EPI; 6307 EPI.ExtInfo = EI; 6308 EPI.Variadic = Variadic; 6309 6310 return getFunctionType(ResType, ArgTypes.data(), ArgTypes.size(), EPI); 6311} 6312 6313GVALinkage ASTContext::GetGVALinkageForFunction(const FunctionDecl *FD) { 6314 GVALinkage External = GVA_StrongExternal; 6315 6316 Linkage L = FD->getLinkage(); 6317 switch (L) { 6318 case NoLinkage: 6319 case InternalLinkage: 6320 case UniqueExternalLinkage: 6321 return GVA_Internal; 6322 6323 case ExternalLinkage: 6324 switch (FD->getTemplateSpecializationKind()) { 6325 case TSK_Undeclared: 6326 case TSK_ExplicitSpecialization: 6327 External = GVA_StrongExternal; 6328 break; 6329 6330 case TSK_ExplicitInstantiationDefinition: 6331 return GVA_ExplicitTemplateInstantiation; 6332 6333 case TSK_ExplicitInstantiationDeclaration: 6334 case TSK_ImplicitInstantiation: 6335 External = GVA_TemplateInstantiation; 6336 break; 6337 } 6338 } 6339 6340 if (!FD->isInlined()) 6341 return External; 6342 6343 if (!getLangOptions().CPlusPlus || FD->hasAttr<GNUInlineAttr>()) { 6344 // GNU or C99 inline semantics. Determine whether this symbol should be 6345 // externally visible. 6346 if (FD->isInlineDefinitionExternallyVisible()) 6347 return External; 6348 6349 // C99 inline semantics, where the symbol is not externally visible. 6350 return GVA_C99Inline; 6351 } 6352 6353 // C++0x [temp.explicit]p9: 6354 // [ Note: The intent is that an inline function that is the subject of 6355 // an explicit instantiation declaration will still be implicitly 6356 // instantiated when used so that the body can be considered for 6357 // inlining, but that no out-of-line copy of the inline function would be 6358 // generated in the translation unit. -- end note ] 6359 if (FD->getTemplateSpecializationKind() 6360 == TSK_ExplicitInstantiationDeclaration) 6361 return GVA_C99Inline; 6362 6363 return GVA_CXXInline; 6364} 6365 6366GVALinkage ASTContext::GetGVALinkageForVariable(const VarDecl *VD) { 6367 // If this is a static data member, compute the kind of template 6368 // specialization. Otherwise, this variable is not part of a 6369 // template. 6370 TemplateSpecializationKind TSK = TSK_Undeclared; 6371 if (VD->isStaticDataMember()) 6372 TSK = VD->getTemplateSpecializationKind(); 6373 6374 Linkage L = VD->getLinkage(); 6375 if (L == ExternalLinkage && getLangOptions().CPlusPlus && 6376 VD->getType()->getLinkage() == UniqueExternalLinkage) 6377 L = UniqueExternalLinkage; 6378 6379 switch (L) { 6380 case NoLinkage: 6381 case InternalLinkage: 6382 case UniqueExternalLinkage: 6383 return GVA_Internal; 6384 6385 case ExternalLinkage: 6386 switch (TSK) { 6387 case TSK_Undeclared: 6388 case TSK_ExplicitSpecialization: 6389 return GVA_StrongExternal; 6390 6391 case TSK_ExplicitInstantiationDeclaration: 6392 llvm_unreachable("Variable should not be instantiated"); 6393 // Fall through to treat this like any other instantiation. 6394 6395 case TSK_ExplicitInstantiationDefinition: 6396 return GVA_ExplicitTemplateInstantiation; 6397 6398 case TSK_ImplicitInstantiation: 6399 return GVA_TemplateInstantiation; 6400 } 6401 } 6402 6403 return GVA_StrongExternal; 6404} 6405 6406bool ASTContext::DeclMustBeEmitted(const Decl *D) { 6407 if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { 6408 if (!VD->isFileVarDecl()) 6409 return false; 6410 } else if (!isa<FunctionDecl>(D)) 6411 return false; 6412 6413 // Weak references don't produce any output by themselves. 6414 if (D->hasAttr<WeakRefAttr>()) 6415 return false; 6416 6417 // Aliases and used decls are required. 6418 if (D->hasAttr<AliasAttr>() || D->hasAttr<UsedAttr>()) 6419 return true; 6420 6421 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 6422 // Forward declarations aren't required. 6423 if (!FD->doesThisDeclarationHaveABody()) 6424 return FD->doesDeclarationForceExternallyVisibleDefinition(); 6425 6426 // Constructors and destructors are required. 6427 if (FD->hasAttr<ConstructorAttr>() || FD->hasAttr<DestructorAttr>()) 6428 return true; 6429 6430 // The key function for a class is required. 6431 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { 6432 const CXXRecordDecl *RD = MD->getParent(); 6433 if (MD->isOutOfLine() && RD->isDynamicClass()) { 6434 const CXXMethodDecl *KeyFunc = getKeyFunction(RD); 6435 if (KeyFunc && KeyFunc->getCanonicalDecl() == MD->getCanonicalDecl()) 6436 return true; 6437 } 6438 } 6439 6440 GVALinkage Linkage = GetGVALinkageForFunction(FD); 6441 6442 // static, static inline, always_inline, and extern inline functions can 6443 // always be deferred. Normal inline functions can be deferred in C99/C++. 6444 // Implicit template instantiations can also be deferred in C++. 6445 if (Linkage == GVA_Internal || Linkage == GVA_C99Inline || 6446 Linkage == GVA_CXXInline || Linkage == GVA_TemplateInstantiation) 6447 return false; 6448 return true; 6449 } 6450 6451 const VarDecl *VD = cast<VarDecl>(D); 6452 assert(VD->isFileVarDecl() && "Expected file scoped var"); 6453 6454 if (VD->isThisDeclarationADefinition() == VarDecl::DeclarationOnly) 6455 return false; 6456 6457 // Structs that have non-trivial constructors or destructors are required. 6458 6459 // FIXME: Handle references. 6460 // FIXME: Be more selective about which constructors we care about. 6461 if (const RecordType *RT = VD->getType()->getAs<RecordType>()) { 6462 if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(RT->getDecl())) { 6463 if (RD->hasDefinition() && !(RD->hasTrivialDefaultConstructor() && 6464 RD->hasTrivialCopyConstructor() && 6465 RD->hasTrivialMoveConstructor() && 6466 RD->hasTrivialDestructor())) 6467 return true; 6468 } 6469 } 6470 6471 GVALinkage L = GetGVALinkageForVariable(VD); 6472 if (L == GVA_Internal || L == GVA_TemplateInstantiation) { 6473 if (!(VD->getInit() && VD->getInit()->HasSideEffects(*this))) 6474 return false; 6475 } 6476 6477 return true; 6478} 6479 6480CallingConv ASTContext::getDefaultMethodCallConv() { 6481 // Pass through to the C++ ABI object 6482 return ABI->getDefaultMethodCallConv(); 6483} 6484 6485bool ASTContext::isNearlyEmpty(const CXXRecordDecl *RD) const { 6486 // Pass through to the C++ ABI object 6487 return ABI->isNearlyEmpty(RD); 6488} 6489 6490MangleContext *ASTContext::createMangleContext() { 6491 switch (Target->getCXXABI()) { 6492 case CXXABI_ARM: 6493 case CXXABI_Itanium: 6494 return createItaniumMangleContext(*this, getDiagnostics()); 6495 case CXXABI_Microsoft: 6496 return createMicrosoftMangleContext(*this, getDiagnostics()); 6497 } 6498 llvm_unreachable("Unsupported ABI"); 6499} 6500 6501CXXABI::~CXXABI() {} 6502 6503size_t ASTContext::getSideTableAllocatedMemory() const { 6504 return ASTRecordLayouts.getMemorySize() 6505 + llvm::capacity_in_bytes(ObjCLayouts) 6506 + llvm::capacity_in_bytes(KeyFunctions) 6507 + llvm::capacity_in_bytes(ObjCImpls) 6508 + llvm::capacity_in_bytes(BlockVarCopyInits) 6509 + llvm::capacity_in_bytes(DeclAttrs) 6510 + llvm::capacity_in_bytes(InstantiatedFromStaticDataMember) 6511 + llvm::capacity_in_bytes(InstantiatedFromUsingDecl) 6512 + llvm::capacity_in_bytes(InstantiatedFromUsingShadowDecl) 6513 + llvm::capacity_in_bytes(InstantiatedFromUnnamedFieldDecl) 6514 + llvm::capacity_in_bytes(OverriddenMethods) 6515 + llvm::capacity_in_bytes(Types) 6516 + llvm::capacity_in_bytes(VariableArrayTypes) 6517 + llvm::capacity_in_bytes(ClassScopeSpecializationPattern); 6518} 6519