ASTContext.cpp revision aa4a99b4a62615db243f7a5c433169f2fc704420
1//===--- ASTContext.cpp - Context to hold long-lived AST nodes ------------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file implements the ASTContext interface. 11// 12//===----------------------------------------------------------------------===// 13 14#include "clang/AST/ASTContext.h" 15#include "clang/AST/CharUnits.h" 16#include "clang/AST/DeclCXX.h" 17#include "clang/AST/DeclObjC.h" 18#include "clang/AST/DeclTemplate.h" 19#include "clang/AST/TypeLoc.h" 20#include "clang/AST/Expr.h" 21#include "clang/AST/ExprCXX.h" 22#include "clang/AST/ExternalASTSource.h" 23#include "clang/AST/ASTMutationListener.h" 24#include "clang/AST/RecordLayout.h" 25#include "clang/AST/Mangle.h" 26#include "clang/Basic/Builtins.h" 27#include "clang/Basic/SourceManager.h" 28#include "clang/Basic/TargetInfo.h" 29#include "llvm/ADT/SmallString.h" 30#include "llvm/ADT/StringExtras.h" 31#include "llvm/Support/MathExtras.h" 32#include "llvm/Support/raw_ostream.h" 33#include "llvm/Support/Capacity.h" 34#include "CXXABI.h" 35#include <map> 36 37using namespace clang; 38 39unsigned ASTContext::NumImplicitDefaultConstructors; 40unsigned ASTContext::NumImplicitDefaultConstructorsDeclared; 41unsigned ASTContext::NumImplicitCopyConstructors; 42unsigned ASTContext::NumImplicitCopyConstructorsDeclared; 43unsigned ASTContext::NumImplicitMoveConstructors; 44unsigned ASTContext::NumImplicitMoveConstructorsDeclared; 45unsigned ASTContext::NumImplicitCopyAssignmentOperators; 46unsigned ASTContext::NumImplicitCopyAssignmentOperatorsDeclared; 47unsigned ASTContext::NumImplicitMoveAssignmentOperators; 48unsigned ASTContext::NumImplicitMoveAssignmentOperatorsDeclared; 49unsigned ASTContext::NumImplicitDestructors; 50unsigned ASTContext::NumImplicitDestructorsDeclared; 51 52enum FloatingRank { 53 HalfRank, FloatRank, DoubleRank, LongDoubleRank 54}; 55 56void 57ASTContext::CanonicalTemplateTemplateParm::Profile(llvm::FoldingSetNodeID &ID, 58 TemplateTemplateParmDecl *Parm) { 59 ID.AddInteger(Parm->getDepth()); 60 ID.AddInteger(Parm->getPosition()); 61 ID.AddBoolean(Parm->isParameterPack()); 62 63 TemplateParameterList *Params = Parm->getTemplateParameters(); 64 ID.AddInteger(Params->size()); 65 for (TemplateParameterList::const_iterator P = Params->begin(), 66 PEnd = Params->end(); 67 P != PEnd; ++P) { 68 if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*P)) { 69 ID.AddInteger(0); 70 ID.AddBoolean(TTP->isParameterPack()); 71 continue; 72 } 73 74 if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(*P)) { 75 ID.AddInteger(1); 76 ID.AddBoolean(NTTP->isParameterPack()); 77 ID.AddPointer(NTTP->getType().getAsOpaquePtr()); 78 if (NTTP->isExpandedParameterPack()) { 79 ID.AddBoolean(true); 80 ID.AddInteger(NTTP->getNumExpansionTypes()); 81 for (unsigned I = 0, N = NTTP->getNumExpansionTypes(); I != N; ++I) 82 ID.AddPointer(NTTP->getExpansionType(I).getAsOpaquePtr()); 83 } else 84 ID.AddBoolean(false); 85 continue; 86 } 87 88 TemplateTemplateParmDecl *TTP = cast<TemplateTemplateParmDecl>(*P); 89 ID.AddInteger(2); 90 Profile(ID, TTP); 91 } 92} 93 94TemplateTemplateParmDecl * 95ASTContext::getCanonicalTemplateTemplateParmDecl( 96 TemplateTemplateParmDecl *TTP) const { 97 // Check if we already have a canonical template template parameter. 98 llvm::FoldingSetNodeID ID; 99 CanonicalTemplateTemplateParm::Profile(ID, TTP); 100 void *InsertPos = 0; 101 CanonicalTemplateTemplateParm *Canonical 102 = CanonTemplateTemplateParms.FindNodeOrInsertPos(ID, InsertPos); 103 if (Canonical) 104 return Canonical->getParam(); 105 106 // Build a canonical template parameter list. 107 TemplateParameterList *Params = TTP->getTemplateParameters(); 108 SmallVector<NamedDecl *, 4> CanonParams; 109 CanonParams.reserve(Params->size()); 110 for (TemplateParameterList::const_iterator P = Params->begin(), 111 PEnd = Params->end(); 112 P != PEnd; ++P) { 113 if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*P)) 114 CanonParams.push_back( 115 TemplateTypeParmDecl::Create(*this, getTranslationUnitDecl(), 116 SourceLocation(), 117 SourceLocation(), 118 TTP->getDepth(), 119 TTP->getIndex(), 0, false, 120 TTP->isParameterPack())); 121 else if (NonTypeTemplateParmDecl *NTTP 122 = dyn_cast<NonTypeTemplateParmDecl>(*P)) { 123 QualType T = getCanonicalType(NTTP->getType()); 124 TypeSourceInfo *TInfo = getTrivialTypeSourceInfo(T); 125 NonTypeTemplateParmDecl *Param; 126 if (NTTP->isExpandedParameterPack()) { 127 SmallVector<QualType, 2> ExpandedTypes; 128 SmallVector<TypeSourceInfo *, 2> ExpandedTInfos; 129 for (unsigned I = 0, N = NTTP->getNumExpansionTypes(); I != N; ++I) { 130 ExpandedTypes.push_back(getCanonicalType(NTTP->getExpansionType(I))); 131 ExpandedTInfos.push_back( 132 getTrivialTypeSourceInfo(ExpandedTypes.back())); 133 } 134 135 Param = NonTypeTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 136 SourceLocation(), 137 SourceLocation(), 138 NTTP->getDepth(), 139 NTTP->getPosition(), 0, 140 T, 141 TInfo, 142 ExpandedTypes.data(), 143 ExpandedTypes.size(), 144 ExpandedTInfos.data()); 145 } else { 146 Param = NonTypeTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 147 SourceLocation(), 148 SourceLocation(), 149 NTTP->getDepth(), 150 NTTP->getPosition(), 0, 151 T, 152 NTTP->isParameterPack(), 153 TInfo); 154 } 155 CanonParams.push_back(Param); 156 157 } else 158 CanonParams.push_back(getCanonicalTemplateTemplateParmDecl( 159 cast<TemplateTemplateParmDecl>(*P))); 160 } 161 162 TemplateTemplateParmDecl *CanonTTP 163 = TemplateTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 164 SourceLocation(), TTP->getDepth(), 165 TTP->getPosition(), 166 TTP->isParameterPack(), 167 0, 168 TemplateParameterList::Create(*this, SourceLocation(), 169 SourceLocation(), 170 CanonParams.data(), 171 CanonParams.size(), 172 SourceLocation())); 173 174 // Get the new insert position for the node we care about. 175 Canonical = CanonTemplateTemplateParms.FindNodeOrInsertPos(ID, InsertPos); 176 assert(Canonical == 0 && "Shouldn't be in the map!"); 177 (void)Canonical; 178 179 // Create the canonical template template parameter entry. 180 Canonical = new (*this) CanonicalTemplateTemplateParm(CanonTTP); 181 CanonTemplateTemplateParms.InsertNode(Canonical, InsertPos); 182 return CanonTTP; 183} 184 185CXXABI *ASTContext::createCXXABI(const TargetInfo &T) { 186 if (!LangOpts.CPlusPlus) return 0; 187 188 switch (T.getCXXABI()) { 189 case CXXABI_ARM: 190 return CreateARMCXXABI(*this); 191 case CXXABI_Itanium: 192 return CreateItaniumCXXABI(*this); 193 case CXXABI_Microsoft: 194 return CreateMicrosoftCXXABI(*this); 195 } 196 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 // half type (OpenCL 6.1.1.1) / ARM NEON __fp16 488 InitBuiltinType(HalfTy, BuiltinType::Half); 489} 490 491DiagnosticsEngine &ASTContext::getDiagnostics() const { 492 return SourceMgr.getDiagnostics(); 493} 494 495AttrVec& ASTContext::getDeclAttrs(const Decl *D) { 496 AttrVec *&Result = DeclAttrs[D]; 497 if (!Result) { 498 void *Mem = Allocate(sizeof(AttrVec)); 499 Result = new (Mem) AttrVec; 500 } 501 502 return *Result; 503} 504 505/// \brief Erase the attributes corresponding to the given declaration. 506void ASTContext::eraseDeclAttrs(const Decl *D) { 507 llvm::DenseMap<const Decl*, AttrVec*>::iterator Pos = DeclAttrs.find(D); 508 if (Pos != DeclAttrs.end()) { 509 Pos->second->~AttrVec(); 510 DeclAttrs.erase(Pos); 511 } 512} 513 514MemberSpecializationInfo * 515ASTContext::getInstantiatedFromStaticDataMember(const VarDecl *Var) { 516 assert(Var->isStaticDataMember() && "Not a static data member"); 517 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *>::iterator Pos 518 = InstantiatedFromStaticDataMember.find(Var); 519 if (Pos == InstantiatedFromStaticDataMember.end()) 520 return 0; 521 522 return Pos->second; 523} 524 525void 526ASTContext::setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 527 TemplateSpecializationKind TSK, 528 SourceLocation PointOfInstantiation) { 529 assert(Inst->isStaticDataMember() && "Not a static data member"); 530 assert(Tmpl->isStaticDataMember() && "Not a static data member"); 531 assert(!InstantiatedFromStaticDataMember[Inst] && 532 "Already noted what static data member was instantiated from"); 533 InstantiatedFromStaticDataMember[Inst] 534 = new (*this) MemberSpecializationInfo(Tmpl, TSK, PointOfInstantiation); 535} 536 537FunctionDecl *ASTContext::getClassScopeSpecializationPattern( 538 const FunctionDecl *FD){ 539 assert(FD && "Specialization is 0"); 540 llvm::DenseMap<const FunctionDecl*, FunctionDecl *>::const_iterator Pos 541 = ClassScopeSpecializationPattern.find(FD); 542 if (Pos == ClassScopeSpecializationPattern.end()) 543 return 0; 544 545 return Pos->second; 546} 547 548void ASTContext::setClassScopeSpecializationPattern(FunctionDecl *FD, 549 FunctionDecl *Pattern) { 550 assert(FD && "Specialization is 0"); 551 assert(Pattern && "Class scope specialization pattern is 0"); 552 ClassScopeSpecializationPattern[FD] = Pattern; 553} 554 555NamedDecl * 556ASTContext::getInstantiatedFromUsingDecl(UsingDecl *UUD) { 557 llvm::DenseMap<UsingDecl *, NamedDecl *>::const_iterator Pos 558 = InstantiatedFromUsingDecl.find(UUD); 559 if (Pos == InstantiatedFromUsingDecl.end()) 560 return 0; 561 562 return Pos->second; 563} 564 565void 566ASTContext::setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern) { 567 assert((isa<UsingDecl>(Pattern) || 568 isa<UnresolvedUsingValueDecl>(Pattern) || 569 isa<UnresolvedUsingTypenameDecl>(Pattern)) && 570 "pattern decl is not a using decl"); 571 assert(!InstantiatedFromUsingDecl[Inst] && "pattern already exists"); 572 InstantiatedFromUsingDecl[Inst] = Pattern; 573} 574 575UsingShadowDecl * 576ASTContext::getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst) { 577 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*>::const_iterator Pos 578 = InstantiatedFromUsingShadowDecl.find(Inst); 579 if (Pos == InstantiatedFromUsingShadowDecl.end()) 580 return 0; 581 582 return Pos->second; 583} 584 585void 586ASTContext::setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 587 UsingShadowDecl *Pattern) { 588 assert(!InstantiatedFromUsingShadowDecl[Inst] && "pattern already exists"); 589 InstantiatedFromUsingShadowDecl[Inst] = Pattern; 590} 591 592FieldDecl *ASTContext::getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field) { 593 llvm::DenseMap<FieldDecl *, FieldDecl *>::iterator Pos 594 = InstantiatedFromUnnamedFieldDecl.find(Field); 595 if (Pos == InstantiatedFromUnnamedFieldDecl.end()) 596 return 0; 597 598 return Pos->second; 599} 600 601void ASTContext::setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, 602 FieldDecl *Tmpl) { 603 assert(!Inst->getDeclName() && "Instantiated field decl is not unnamed"); 604 assert(!Tmpl->getDeclName() && "Template field decl is not unnamed"); 605 assert(!InstantiatedFromUnnamedFieldDecl[Inst] && 606 "Already noted what unnamed field was instantiated from"); 607 608 InstantiatedFromUnnamedFieldDecl[Inst] = Tmpl; 609} 610 611bool ASTContext::ZeroBitfieldFollowsNonBitfield(const FieldDecl *FD, 612 const FieldDecl *LastFD) const { 613 return (FD->isBitField() && LastFD && !LastFD->isBitField() && 614 FD->getBitWidthValue(*this) == 0); 615} 616 617bool ASTContext::ZeroBitfieldFollowsBitfield(const FieldDecl *FD, 618 const FieldDecl *LastFD) const { 619 return (FD->isBitField() && LastFD && LastFD->isBitField() && 620 FD->getBitWidthValue(*this) == 0 && 621 LastFD->getBitWidthValue(*this) != 0); 622} 623 624bool ASTContext::BitfieldFollowsBitfield(const FieldDecl *FD, 625 const FieldDecl *LastFD) const { 626 return (FD->isBitField() && LastFD && LastFD->isBitField() && 627 FD->getBitWidthValue(*this) && 628 LastFD->getBitWidthValue(*this)); 629} 630 631bool ASTContext::NonBitfieldFollowsBitfield(const FieldDecl *FD, 632 const FieldDecl *LastFD) const { 633 return (!FD->isBitField() && LastFD && LastFD->isBitField() && 634 LastFD->getBitWidthValue(*this)); 635} 636 637bool ASTContext::BitfieldFollowsNonBitfield(const FieldDecl *FD, 638 const FieldDecl *LastFD) const { 639 return (FD->isBitField() && LastFD && !LastFD->isBitField() && 640 FD->getBitWidthValue(*this)); 641} 642 643ASTContext::overridden_cxx_method_iterator 644ASTContext::overridden_methods_begin(const CXXMethodDecl *Method) const { 645 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 646 = OverriddenMethods.find(Method); 647 if (Pos == OverriddenMethods.end()) 648 return 0; 649 650 return Pos->second.begin(); 651} 652 653ASTContext::overridden_cxx_method_iterator 654ASTContext::overridden_methods_end(const CXXMethodDecl *Method) const { 655 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 656 = OverriddenMethods.find(Method); 657 if (Pos == OverriddenMethods.end()) 658 return 0; 659 660 return Pos->second.end(); 661} 662 663unsigned 664ASTContext::overridden_methods_size(const CXXMethodDecl *Method) const { 665 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 666 = OverriddenMethods.find(Method); 667 if (Pos == OverriddenMethods.end()) 668 return 0; 669 670 return Pos->second.size(); 671} 672 673void ASTContext::addOverriddenMethod(const CXXMethodDecl *Method, 674 const CXXMethodDecl *Overridden) { 675 OverriddenMethods[Method].push_back(Overridden); 676} 677 678//===----------------------------------------------------------------------===// 679// Type Sizing and Analysis 680//===----------------------------------------------------------------------===// 681 682/// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 683/// scalar floating point type. 684const llvm::fltSemantics &ASTContext::getFloatTypeSemantics(QualType T) const { 685 const BuiltinType *BT = T->getAs<BuiltinType>(); 686 assert(BT && "Not a floating point type!"); 687 switch (BT->getKind()) { 688 default: llvm_unreachable("Not a floating point type!"); 689 case BuiltinType::Half: return Target->getHalfFormat(); 690 case BuiltinType::Float: return Target->getFloatFormat(); 691 case BuiltinType::Double: return Target->getDoubleFormat(); 692 case BuiltinType::LongDouble: return Target->getLongDoubleFormat(); 693 } 694} 695 696/// getDeclAlign - Return a conservative estimate of the alignment of the 697/// specified decl. Note that bitfields do not have a valid alignment, so 698/// this method will assert on them. 699/// If @p RefAsPointee, references are treated like their underlying type 700/// (for alignof), else they're treated like pointers (for CodeGen). 701CharUnits ASTContext::getDeclAlign(const Decl *D, bool RefAsPointee) const { 702 unsigned Align = Target->getCharWidth(); 703 704 bool UseAlignAttrOnly = false; 705 if (unsigned AlignFromAttr = D->getMaxAlignment()) { 706 Align = AlignFromAttr; 707 708 // __attribute__((aligned)) can increase or decrease alignment 709 // *except* on a struct or struct member, where it only increases 710 // alignment unless 'packed' is also specified. 711 // 712 // It is an error for alignas to decrease alignment, so we can 713 // ignore that possibility; Sema should diagnose it. 714 if (isa<FieldDecl>(D)) { 715 UseAlignAttrOnly = D->hasAttr<PackedAttr>() || 716 cast<FieldDecl>(D)->getParent()->hasAttr<PackedAttr>(); 717 } else { 718 UseAlignAttrOnly = true; 719 } 720 } 721 else if (isa<FieldDecl>(D)) 722 UseAlignAttrOnly = 723 D->hasAttr<PackedAttr>() || 724 cast<FieldDecl>(D)->getParent()->hasAttr<PackedAttr>(); 725 726 // If we're using the align attribute only, just ignore everything 727 // else about the declaration and its type. 728 if (UseAlignAttrOnly) { 729 // do nothing 730 731 } else if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) { 732 QualType T = VD->getType(); 733 if (const ReferenceType* RT = T->getAs<ReferenceType>()) { 734 if (RefAsPointee) 735 T = RT->getPointeeType(); 736 else 737 T = getPointerType(RT->getPointeeType()); 738 } 739 if (!T->isIncompleteType() && !T->isFunctionType()) { 740 // Adjust alignments of declarations with array type by the 741 // large-array alignment on the target. 742 unsigned MinWidth = Target->getLargeArrayMinWidth(); 743 const ArrayType *arrayType; 744 if (MinWidth && (arrayType = getAsArrayType(T))) { 745 if (isa<VariableArrayType>(arrayType)) 746 Align = std::max(Align, Target->getLargeArrayAlign()); 747 else if (isa<ConstantArrayType>(arrayType) && 748 MinWidth <= getTypeSize(cast<ConstantArrayType>(arrayType))) 749 Align = std::max(Align, Target->getLargeArrayAlign()); 750 751 // Walk through any array types while we're at it. 752 T = getBaseElementType(arrayType); 753 } 754 Align = std::max(Align, getPreferredTypeAlign(T.getTypePtr())); 755 } 756 757 // Fields can be subject to extra alignment constraints, like if 758 // the field is packed, the struct is packed, or the struct has a 759 // a max-field-alignment constraint (#pragma pack). So calculate 760 // the actual alignment of the field within the struct, and then 761 // (as we're expected to) constrain that by the alignment of the type. 762 if (const FieldDecl *field = dyn_cast<FieldDecl>(VD)) { 763 // So calculate the alignment of the field. 764 const ASTRecordLayout &layout = getASTRecordLayout(field->getParent()); 765 766 // Start with the record's overall alignment. 767 unsigned fieldAlign = toBits(layout.getAlignment()); 768 769 // Use the GCD of that and the offset within the record. 770 uint64_t offset = layout.getFieldOffset(field->getFieldIndex()); 771 if (offset > 0) { 772 // Alignment is always a power of 2, so the GCD will be a power of 2, 773 // which means we get to do this crazy thing instead of Euclid's. 774 uint64_t lowBitOfOffset = offset & (~offset + 1); 775 if (lowBitOfOffset < fieldAlign) 776 fieldAlign = static_cast<unsigned>(lowBitOfOffset); 777 } 778 779 Align = std::min(Align, fieldAlign); 780 } 781 } 782 783 return toCharUnitsFromBits(Align); 784} 785 786std::pair<CharUnits, CharUnits> 787ASTContext::getTypeInfoInChars(const Type *T) const { 788 std::pair<uint64_t, unsigned> Info = getTypeInfo(T); 789 return std::make_pair(toCharUnitsFromBits(Info.first), 790 toCharUnitsFromBits(Info.second)); 791} 792 793std::pair<CharUnits, CharUnits> 794ASTContext::getTypeInfoInChars(QualType T) const { 795 return getTypeInfoInChars(T.getTypePtr()); 796} 797 798/// getTypeSize - Return the size of the specified type, in bits. This method 799/// does not work on incomplete types. 800/// 801/// FIXME: Pointers into different addr spaces could have different sizes and 802/// alignment requirements: getPointerInfo should take an AddrSpace, this 803/// should take a QualType, &c. 804std::pair<uint64_t, unsigned> 805ASTContext::getTypeInfo(const Type *T) const { 806 uint64_t Width=0; 807 unsigned Align=8; 808 switch (T->getTypeClass()) { 809#define TYPE(Class, Base) 810#define ABSTRACT_TYPE(Class, Base) 811#define NON_CANONICAL_TYPE(Class, Base) 812#define DEPENDENT_TYPE(Class, Base) case Type::Class: 813#include "clang/AST/TypeNodes.def" 814 llvm_unreachable("Should not see dependent types"); 815 break; 816 817 case Type::FunctionNoProto: 818 case Type::FunctionProto: 819 // GCC extension: alignof(function) = 32 bits 820 Width = 0; 821 Align = 32; 822 break; 823 824 case Type::IncompleteArray: 825 case Type::VariableArray: 826 Width = 0; 827 Align = getTypeAlign(cast<ArrayType>(T)->getElementType()); 828 break; 829 830 case Type::ConstantArray: { 831 const ConstantArrayType *CAT = cast<ConstantArrayType>(T); 832 833 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(CAT->getElementType()); 834 Width = EltInfo.first*CAT->getSize().getZExtValue(); 835 Align = EltInfo.second; 836 Width = llvm::RoundUpToAlignment(Width, Align); 837 break; 838 } 839 case Type::ExtVector: 840 case Type::Vector: { 841 const VectorType *VT = cast<VectorType>(T); 842 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(VT->getElementType()); 843 Width = EltInfo.first*VT->getNumElements(); 844 Align = Width; 845 // If the alignment is not a power of 2, round up to the next power of 2. 846 // This happens for non-power-of-2 length vectors. 847 if (Align & (Align-1)) { 848 Align = llvm::NextPowerOf2(Align); 849 Width = llvm::RoundUpToAlignment(Width, Align); 850 } 851 break; 852 } 853 854 case Type::Builtin: 855 switch (cast<BuiltinType>(T)->getKind()) { 856 default: llvm_unreachable("Unknown builtin type!"); 857 case BuiltinType::Void: 858 // GCC extension: alignof(void) = 8 bits. 859 Width = 0; 860 Align = 8; 861 break; 862 863 case BuiltinType::Bool: 864 Width = Target->getBoolWidth(); 865 Align = Target->getBoolAlign(); 866 break; 867 case BuiltinType::Char_S: 868 case BuiltinType::Char_U: 869 case BuiltinType::UChar: 870 case BuiltinType::SChar: 871 Width = Target->getCharWidth(); 872 Align = Target->getCharAlign(); 873 break; 874 case BuiltinType::WChar_S: 875 case BuiltinType::WChar_U: 876 Width = Target->getWCharWidth(); 877 Align = Target->getWCharAlign(); 878 break; 879 case BuiltinType::Char16: 880 Width = Target->getChar16Width(); 881 Align = Target->getChar16Align(); 882 break; 883 case BuiltinType::Char32: 884 Width = Target->getChar32Width(); 885 Align = Target->getChar32Align(); 886 break; 887 case BuiltinType::UShort: 888 case BuiltinType::Short: 889 Width = Target->getShortWidth(); 890 Align = Target->getShortAlign(); 891 break; 892 case BuiltinType::UInt: 893 case BuiltinType::Int: 894 Width = Target->getIntWidth(); 895 Align = Target->getIntAlign(); 896 break; 897 case BuiltinType::ULong: 898 case BuiltinType::Long: 899 Width = Target->getLongWidth(); 900 Align = Target->getLongAlign(); 901 break; 902 case BuiltinType::ULongLong: 903 case BuiltinType::LongLong: 904 Width = Target->getLongLongWidth(); 905 Align = Target->getLongLongAlign(); 906 break; 907 case BuiltinType::Int128: 908 case BuiltinType::UInt128: 909 Width = 128; 910 Align = 128; // int128_t is 128-bit aligned on all targets. 911 break; 912 case BuiltinType::Half: 913 Width = Target->getHalfWidth(); 914 Align = Target->getHalfAlign(); 915 break; 916 case BuiltinType::Float: 917 Width = Target->getFloatWidth(); 918 Align = Target->getFloatAlign(); 919 break; 920 case BuiltinType::Double: 921 Width = Target->getDoubleWidth(); 922 Align = Target->getDoubleAlign(); 923 break; 924 case BuiltinType::LongDouble: 925 Width = Target->getLongDoubleWidth(); 926 Align = Target->getLongDoubleAlign(); 927 break; 928 case BuiltinType::NullPtr: 929 Width = Target->getPointerWidth(0); // C++ 3.9.1p11: sizeof(nullptr_t) 930 Align = Target->getPointerAlign(0); // == sizeof(void*) 931 break; 932 case BuiltinType::ObjCId: 933 case BuiltinType::ObjCClass: 934 case BuiltinType::ObjCSel: 935 Width = Target->getPointerWidth(0); 936 Align = Target->getPointerAlign(0); 937 break; 938 } 939 break; 940 case Type::ObjCObjectPointer: 941 Width = Target->getPointerWidth(0); 942 Align = Target->getPointerAlign(0); 943 break; 944 case Type::BlockPointer: { 945 unsigned AS = getTargetAddressSpace( 946 cast<BlockPointerType>(T)->getPointeeType()); 947 Width = Target->getPointerWidth(AS); 948 Align = Target->getPointerAlign(AS); 949 break; 950 } 951 case Type::LValueReference: 952 case Type::RValueReference: { 953 // alignof and sizeof should never enter this code path here, so we go 954 // the pointer route. 955 unsigned AS = getTargetAddressSpace( 956 cast<ReferenceType>(T)->getPointeeType()); 957 Width = Target->getPointerWidth(AS); 958 Align = Target->getPointerAlign(AS); 959 break; 960 } 961 case Type::Pointer: { 962 unsigned AS = getTargetAddressSpace(cast<PointerType>(T)->getPointeeType()); 963 Width = Target->getPointerWidth(AS); 964 Align = Target->getPointerAlign(AS); 965 break; 966 } 967 case Type::MemberPointer: { 968 const MemberPointerType *MPT = cast<MemberPointerType>(T); 969 std::pair<uint64_t, unsigned> PtrDiffInfo = 970 getTypeInfo(getPointerDiffType()); 971 Width = PtrDiffInfo.first * ABI->getMemberPointerSize(MPT); 972 Align = PtrDiffInfo.second; 973 break; 974 } 975 case Type::Complex: { 976 // Complex types have the same alignment as their elements, but twice the 977 // size. 978 std::pair<uint64_t, unsigned> EltInfo = 979 getTypeInfo(cast<ComplexType>(T)->getElementType()); 980 Width = EltInfo.first*2; 981 Align = EltInfo.second; 982 break; 983 } 984 case Type::ObjCObject: 985 return getTypeInfo(cast<ObjCObjectType>(T)->getBaseType().getTypePtr()); 986 case Type::ObjCInterface: { 987 const ObjCInterfaceType *ObjCI = cast<ObjCInterfaceType>(T); 988 const ASTRecordLayout &Layout = getASTObjCInterfaceLayout(ObjCI->getDecl()); 989 Width = toBits(Layout.getSize()); 990 Align = toBits(Layout.getAlignment()); 991 break; 992 } 993 case Type::Record: 994 case Type::Enum: { 995 const TagType *TT = cast<TagType>(T); 996 997 if (TT->getDecl()->isInvalidDecl()) { 998 Width = 8; 999 Align = 8; 1000 break; 1001 } 1002 1003 if (const EnumType *ET = dyn_cast<EnumType>(TT)) 1004 return getTypeInfo(ET->getDecl()->getIntegerType()); 1005 1006 const RecordType *RT = cast<RecordType>(TT); 1007 const ASTRecordLayout &Layout = getASTRecordLayout(RT->getDecl()); 1008 Width = toBits(Layout.getSize()); 1009 Align = toBits(Layout.getAlignment()); 1010 break; 1011 } 1012 1013 case Type::SubstTemplateTypeParm: 1014 return getTypeInfo(cast<SubstTemplateTypeParmType>(T)-> 1015 getReplacementType().getTypePtr()); 1016 1017 case Type::Auto: { 1018 const AutoType *A = cast<AutoType>(T); 1019 assert(A->isDeduced() && "Cannot request the size of a dependent type"); 1020 return getTypeInfo(A->getDeducedType().getTypePtr()); 1021 } 1022 1023 case Type::Paren: 1024 return getTypeInfo(cast<ParenType>(T)->getInnerType().getTypePtr()); 1025 1026 case Type::Typedef: { 1027 const TypedefNameDecl *Typedef = cast<TypedefType>(T)->getDecl(); 1028 std::pair<uint64_t, unsigned> Info 1029 = getTypeInfo(Typedef->getUnderlyingType().getTypePtr()); 1030 // If the typedef has an aligned attribute on it, it overrides any computed 1031 // alignment we have. This violates the GCC documentation (which says that 1032 // attribute(aligned) can only round up) but matches its implementation. 1033 if (unsigned AttrAlign = Typedef->getMaxAlignment()) 1034 Align = AttrAlign; 1035 else 1036 Align = Info.second; 1037 Width = Info.first; 1038 break; 1039 } 1040 1041 case Type::TypeOfExpr: 1042 return getTypeInfo(cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType() 1043 .getTypePtr()); 1044 1045 case Type::TypeOf: 1046 return getTypeInfo(cast<TypeOfType>(T)->getUnderlyingType().getTypePtr()); 1047 1048 case Type::Decltype: 1049 return getTypeInfo(cast<DecltypeType>(T)->getUnderlyingExpr()->getType() 1050 .getTypePtr()); 1051 1052 case Type::UnaryTransform: 1053 return getTypeInfo(cast<UnaryTransformType>(T)->getUnderlyingType()); 1054 1055 case Type::Elaborated: 1056 return getTypeInfo(cast<ElaboratedType>(T)->getNamedType().getTypePtr()); 1057 1058 case Type::Attributed: 1059 return getTypeInfo( 1060 cast<AttributedType>(T)->getEquivalentType().getTypePtr()); 1061 1062 case Type::TemplateSpecialization: { 1063 assert(getCanonicalType(T) != T && 1064 "Cannot request the size of a dependent type"); 1065 const TemplateSpecializationType *TST = cast<TemplateSpecializationType>(T); 1066 // A type alias template specialization may refer to a typedef with the 1067 // aligned attribute on it. 1068 if (TST->isTypeAlias()) 1069 return getTypeInfo(TST->getAliasedType().getTypePtr()); 1070 else 1071 return getTypeInfo(getCanonicalType(T)); 1072 } 1073 1074 case Type::Atomic: { 1075 std::pair<uint64_t, unsigned> Info 1076 = getTypeInfo(cast<AtomicType>(T)->getValueType()); 1077 Width = Info.first; 1078 Align = Info.second; 1079 if (Width != 0 && Width <= Target->getMaxAtomicPromoteWidth() && 1080 llvm::isPowerOf2_64(Width)) { 1081 // We can potentially perform lock-free atomic operations for this 1082 // type; promote the alignment appropriately. 1083 // FIXME: We could potentially promote the width here as well... 1084 // is that worthwhile? (Non-struct atomic types generally have 1085 // power-of-two size anyway, but structs might not. Requires a bit 1086 // of implementation work to make sure we zero out the extra bits.) 1087 Align = static_cast<unsigned>(Width); 1088 } 1089 } 1090 1091 } 1092 1093 assert(llvm::isPowerOf2_32(Align) && "Alignment must be power of 2"); 1094 return std::make_pair(Width, Align); 1095} 1096 1097/// toCharUnitsFromBits - Convert a size in bits to a size in characters. 1098CharUnits ASTContext::toCharUnitsFromBits(int64_t BitSize) const { 1099 return CharUnits::fromQuantity(BitSize / getCharWidth()); 1100} 1101 1102/// toBits - Convert a size in characters to a size in characters. 1103int64_t ASTContext::toBits(CharUnits CharSize) const { 1104 return CharSize.getQuantity() * getCharWidth(); 1105} 1106 1107/// getTypeSizeInChars - Return the size of the specified type, in characters. 1108/// This method does not work on incomplete types. 1109CharUnits ASTContext::getTypeSizeInChars(QualType T) const { 1110 return toCharUnitsFromBits(getTypeSize(T)); 1111} 1112CharUnits ASTContext::getTypeSizeInChars(const Type *T) const { 1113 return toCharUnitsFromBits(getTypeSize(T)); 1114} 1115 1116/// getTypeAlignInChars - Return the ABI-specified alignment of a type, in 1117/// characters. This method does not work on incomplete types. 1118CharUnits ASTContext::getTypeAlignInChars(QualType T) const { 1119 return toCharUnitsFromBits(getTypeAlign(T)); 1120} 1121CharUnits ASTContext::getTypeAlignInChars(const Type *T) const { 1122 return toCharUnitsFromBits(getTypeAlign(T)); 1123} 1124 1125/// getPreferredTypeAlign - Return the "preferred" alignment of the specified 1126/// type for the current target in bits. This can be different than the ABI 1127/// alignment in cases where it is beneficial for performance to overalign 1128/// a data type. 1129unsigned ASTContext::getPreferredTypeAlign(const Type *T) const { 1130 unsigned ABIAlign = getTypeAlign(T); 1131 1132 // Double and long long should be naturally aligned if possible. 1133 if (const ComplexType* CT = T->getAs<ComplexType>()) 1134 T = CT->getElementType().getTypePtr(); 1135 if (T->isSpecificBuiltinType(BuiltinType::Double) || 1136 T->isSpecificBuiltinType(BuiltinType::LongLong)) 1137 return std::max(ABIAlign, (unsigned)getTypeSize(T)); 1138 1139 return ABIAlign; 1140} 1141 1142/// DeepCollectObjCIvars - 1143/// This routine first collects all declared, but not synthesized, ivars in 1144/// super class and then collects all ivars, including those synthesized for 1145/// current class. This routine is used for implementation of current class 1146/// when all ivars, declared and synthesized are known. 1147/// 1148void ASTContext::DeepCollectObjCIvars(const ObjCInterfaceDecl *OI, 1149 bool leafClass, 1150 SmallVectorImpl<const ObjCIvarDecl*> &Ivars) const { 1151 if (const ObjCInterfaceDecl *SuperClass = OI->getSuperClass()) 1152 DeepCollectObjCIvars(SuperClass, false, Ivars); 1153 if (!leafClass) { 1154 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 1155 E = OI->ivar_end(); I != E; ++I) 1156 Ivars.push_back(*I); 1157 } else { 1158 ObjCInterfaceDecl *IDecl = const_cast<ObjCInterfaceDecl *>(OI); 1159 for (const ObjCIvarDecl *Iv = IDecl->all_declared_ivar_begin(); Iv; 1160 Iv= Iv->getNextIvar()) 1161 Ivars.push_back(Iv); 1162 } 1163} 1164 1165/// CollectInheritedProtocols - Collect all protocols in current class and 1166/// those inherited by it. 1167void ASTContext::CollectInheritedProtocols(const Decl *CDecl, 1168 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols) { 1169 if (const ObjCInterfaceDecl *OI = dyn_cast<ObjCInterfaceDecl>(CDecl)) { 1170 // We can use protocol_iterator here instead of 1171 // all_referenced_protocol_iterator since we are walking all categories. 1172 for (ObjCInterfaceDecl::all_protocol_iterator P = OI->all_referenced_protocol_begin(), 1173 PE = OI->all_referenced_protocol_end(); P != PE; ++P) { 1174 ObjCProtocolDecl *Proto = (*P); 1175 Protocols.insert(Proto); 1176 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1177 PE = Proto->protocol_end(); P != PE; ++P) { 1178 Protocols.insert(*P); 1179 CollectInheritedProtocols(*P, Protocols); 1180 } 1181 } 1182 1183 // Categories of this Interface. 1184 for (const ObjCCategoryDecl *CDeclChain = OI->getCategoryList(); 1185 CDeclChain; CDeclChain = CDeclChain->getNextClassCategory()) 1186 CollectInheritedProtocols(CDeclChain, Protocols); 1187 if (ObjCInterfaceDecl *SD = OI->getSuperClass()) 1188 while (SD) { 1189 CollectInheritedProtocols(SD, Protocols); 1190 SD = SD->getSuperClass(); 1191 } 1192 } else if (const ObjCCategoryDecl *OC = dyn_cast<ObjCCategoryDecl>(CDecl)) { 1193 for (ObjCCategoryDecl::protocol_iterator P = OC->protocol_begin(), 1194 PE = OC->protocol_end(); P != PE; ++P) { 1195 ObjCProtocolDecl *Proto = (*P); 1196 Protocols.insert(Proto); 1197 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1198 PE = Proto->protocol_end(); P != PE; ++P) 1199 CollectInheritedProtocols(*P, Protocols); 1200 } 1201 } else if (const ObjCProtocolDecl *OP = dyn_cast<ObjCProtocolDecl>(CDecl)) { 1202 for (ObjCProtocolDecl::protocol_iterator P = OP->protocol_begin(), 1203 PE = OP->protocol_end(); P != PE; ++P) { 1204 ObjCProtocolDecl *Proto = (*P); 1205 Protocols.insert(Proto); 1206 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1207 PE = Proto->protocol_end(); P != PE; ++P) 1208 CollectInheritedProtocols(*P, Protocols); 1209 } 1210 } 1211} 1212 1213unsigned ASTContext::CountNonClassIvars(const ObjCInterfaceDecl *OI) const { 1214 unsigned count = 0; 1215 // Count ivars declared in class extension. 1216 for (const ObjCCategoryDecl *CDecl = OI->getFirstClassExtension(); CDecl; 1217 CDecl = CDecl->getNextClassExtension()) 1218 count += CDecl->ivar_size(); 1219 1220 // Count ivar defined in this class's implementation. This 1221 // includes synthesized ivars. 1222 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) 1223 count += ImplDecl->ivar_size(); 1224 1225 return count; 1226} 1227 1228/// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 1229ObjCImplementationDecl *ASTContext::getObjCImplementation(ObjCInterfaceDecl *D) { 1230 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 1231 I = ObjCImpls.find(D); 1232 if (I != ObjCImpls.end()) 1233 return cast<ObjCImplementationDecl>(I->second); 1234 return 0; 1235} 1236/// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 1237ObjCCategoryImplDecl *ASTContext::getObjCImplementation(ObjCCategoryDecl *D) { 1238 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 1239 I = ObjCImpls.find(D); 1240 if (I != ObjCImpls.end()) 1241 return cast<ObjCCategoryImplDecl>(I->second); 1242 return 0; 1243} 1244 1245/// \brief Set the implementation of ObjCInterfaceDecl. 1246void ASTContext::setObjCImplementation(ObjCInterfaceDecl *IFaceD, 1247 ObjCImplementationDecl *ImplD) { 1248 assert(IFaceD && ImplD && "Passed null params"); 1249 ObjCImpls[IFaceD] = ImplD; 1250} 1251/// \brief Set the implementation of ObjCCategoryDecl. 1252void ASTContext::setObjCImplementation(ObjCCategoryDecl *CatD, 1253 ObjCCategoryImplDecl *ImplD) { 1254 assert(CatD && ImplD && "Passed null params"); 1255 ObjCImpls[CatD] = ImplD; 1256} 1257 1258/// \brief Get the copy initialization expression of VarDecl,or NULL if 1259/// none exists. 1260Expr *ASTContext::getBlockVarCopyInits(const VarDecl*VD) { 1261 assert(VD && "Passed null params"); 1262 assert(VD->hasAttr<BlocksAttr>() && 1263 "getBlockVarCopyInits - not __block var"); 1264 llvm::DenseMap<const VarDecl*, Expr*>::iterator 1265 I = BlockVarCopyInits.find(VD); 1266 return (I != BlockVarCopyInits.end()) ? cast<Expr>(I->second) : 0; 1267} 1268 1269/// \brief Set the copy inialization expression of a block var decl. 1270void ASTContext::setBlockVarCopyInits(VarDecl*VD, Expr* Init) { 1271 assert(VD && Init && "Passed null params"); 1272 assert(VD->hasAttr<BlocksAttr>() && 1273 "setBlockVarCopyInits - not __block var"); 1274 BlockVarCopyInits[VD] = Init; 1275} 1276 1277/// \brief Allocate an uninitialized TypeSourceInfo. 1278/// 1279/// The caller should initialize the memory held by TypeSourceInfo using 1280/// the TypeLoc wrappers. 1281/// 1282/// \param T the type that will be the basis for type source info. This type 1283/// should refer to how the declarator was written in source code, not to 1284/// what type semantic analysis resolved the declarator to. 1285TypeSourceInfo *ASTContext::CreateTypeSourceInfo(QualType T, 1286 unsigned DataSize) const { 1287 if (!DataSize) 1288 DataSize = TypeLoc::getFullDataSizeForType(T); 1289 else 1290 assert(DataSize == TypeLoc::getFullDataSizeForType(T) && 1291 "incorrect data size provided to CreateTypeSourceInfo!"); 1292 1293 TypeSourceInfo *TInfo = 1294 (TypeSourceInfo*)BumpAlloc.Allocate(sizeof(TypeSourceInfo) + DataSize, 8); 1295 new (TInfo) TypeSourceInfo(T); 1296 return TInfo; 1297} 1298 1299TypeSourceInfo *ASTContext::getTrivialTypeSourceInfo(QualType T, 1300 SourceLocation L) const { 1301 TypeSourceInfo *DI = CreateTypeSourceInfo(T); 1302 DI->getTypeLoc().initialize(const_cast<ASTContext &>(*this), L); 1303 return DI; 1304} 1305 1306const ASTRecordLayout & 1307ASTContext::getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) const { 1308 return getObjCLayout(D, 0); 1309} 1310 1311const ASTRecordLayout & 1312ASTContext::getASTObjCImplementationLayout( 1313 const ObjCImplementationDecl *D) const { 1314 return getObjCLayout(D->getClassInterface(), D); 1315} 1316 1317//===----------------------------------------------------------------------===// 1318// Type creation/memoization methods 1319//===----------------------------------------------------------------------===// 1320 1321QualType 1322ASTContext::getExtQualType(const Type *baseType, Qualifiers quals) const { 1323 unsigned fastQuals = quals.getFastQualifiers(); 1324 quals.removeFastQualifiers(); 1325 1326 // Check if we've already instantiated this type. 1327 llvm::FoldingSetNodeID ID; 1328 ExtQuals::Profile(ID, baseType, quals); 1329 void *insertPos = 0; 1330 if (ExtQuals *eq = ExtQualNodes.FindNodeOrInsertPos(ID, insertPos)) { 1331 assert(eq->getQualifiers() == quals); 1332 return QualType(eq, fastQuals); 1333 } 1334 1335 // If the base type is not canonical, make the appropriate canonical type. 1336 QualType canon; 1337 if (!baseType->isCanonicalUnqualified()) { 1338 SplitQualType canonSplit = baseType->getCanonicalTypeInternal().split(); 1339 canonSplit.second.addConsistentQualifiers(quals); 1340 canon = getExtQualType(canonSplit.first, canonSplit.second); 1341 1342 // Re-find the insert position. 1343 (void) ExtQualNodes.FindNodeOrInsertPos(ID, insertPos); 1344 } 1345 1346 ExtQuals *eq = new (*this, TypeAlignment) ExtQuals(baseType, canon, quals); 1347 ExtQualNodes.InsertNode(eq, insertPos); 1348 return QualType(eq, fastQuals); 1349} 1350 1351QualType 1352ASTContext::getAddrSpaceQualType(QualType T, unsigned AddressSpace) const { 1353 QualType CanT = getCanonicalType(T); 1354 if (CanT.getAddressSpace() == AddressSpace) 1355 return T; 1356 1357 // If we are composing extended qualifiers together, merge together 1358 // into one ExtQuals node. 1359 QualifierCollector Quals; 1360 const Type *TypeNode = Quals.strip(T); 1361 1362 // If this type already has an address space specified, it cannot get 1363 // another one. 1364 assert(!Quals.hasAddressSpace() && 1365 "Type cannot be in multiple addr spaces!"); 1366 Quals.addAddressSpace(AddressSpace); 1367 1368 return getExtQualType(TypeNode, Quals); 1369} 1370 1371QualType ASTContext::getObjCGCQualType(QualType T, 1372 Qualifiers::GC GCAttr) const { 1373 QualType CanT = getCanonicalType(T); 1374 if (CanT.getObjCGCAttr() == GCAttr) 1375 return T; 1376 1377 if (const PointerType *ptr = T->getAs<PointerType>()) { 1378 QualType Pointee = ptr->getPointeeType(); 1379 if (Pointee->isAnyPointerType()) { 1380 QualType ResultType = getObjCGCQualType(Pointee, GCAttr); 1381 return getPointerType(ResultType); 1382 } 1383 } 1384 1385 // If we are composing extended qualifiers together, merge together 1386 // into one ExtQuals node. 1387 QualifierCollector Quals; 1388 const Type *TypeNode = Quals.strip(T); 1389 1390 // If this type already has an ObjCGC specified, it cannot get 1391 // another one. 1392 assert(!Quals.hasObjCGCAttr() && 1393 "Type cannot have multiple ObjCGCs!"); 1394 Quals.addObjCGCAttr(GCAttr); 1395 1396 return getExtQualType(TypeNode, Quals); 1397} 1398 1399const FunctionType *ASTContext::adjustFunctionType(const FunctionType *T, 1400 FunctionType::ExtInfo Info) { 1401 if (T->getExtInfo() == Info) 1402 return T; 1403 1404 QualType Result; 1405 if (const FunctionNoProtoType *FNPT = dyn_cast<FunctionNoProtoType>(T)) { 1406 Result = getFunctionNoProtoType(FNPT->getResultType(), Info); 1407 } else { 1408 const FunctionProtoType *FPT = cast<FunctionProtoType>(T); 1409 FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); 1410 EPI.ExtInfo = Info; 1411 Result = getFunctionType(FPT->getResultType(), FPT->arg_type_begin(), 1412 FPT->getNumArgs(), EPI); 1413 } 1414 1415 return cast<FunctionType>(Result.getTypePtr()); 1416} 1417 1418/// getComplexType - Return the uniqued reference to the type for a complex 1419/// number with the specified element type. 1420QualType ASTContext::getComplexType(QualType T) const { 1421 // Unique pointers, to guarantee there is only one pointer of a particular 1422 // structure. 1423 llvm::FoldingSetNodeID ID; 1424 ComplexType::Profile(ID, T); 1425 1426 void *InsertPos = 0; 1427 if (ComplexType *CT = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos)) 1428 return QualType(CT, 0); 1429 1430 // If the pointee type isn't canonical, this won't be a canonical type either, 1431 // so fill in the canonical type field. 1432 QualType Canonical; 1433 if (!T.isCanonical()) { 1434 Canonical = getComplexType(getCanonicalType(T)); 1435 1436 // Get the new insert position for the node we care about. 1437 ComplexType *NewIP = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos); 1438 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1439 } 1440 ComplexType *New = new (*this, TypeAlignment) ComplexType(T, Canonical); 1441 Types.push_back(New); 1442 ComplexTypes.InsertNode(New, InsertPos); 1443 return QualType(New, 0); 1444} 1445 1446/// getPointerType - Return the uniqued reference to the type for a pointer to 1447/// the specified type. 1448QualType ASTContext::getPointerType(QualType T) const { 1449 // Unique pointers, to guarantee there is only one pointer of a particular 1450 // structure. 1451 llvm::FoldingSetNodeID ID; 1452 PointerType::Profile(ID, T); 1453 1454 void *InsertPos = 0; 1455 if (PointerType *PT = PointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1456 return QualType(PT, 0); 1457 1458 // If the pointee type isn't canonical, this won't be a canonical type either, 1459 // so fill in the canonical type field. 1460 QualType Canonical; 1461 if (!T.isCanonical()) { 1462 Canonical = getPointerType(getCanonicalType(T)); 1463 1464 // Get the new insert position for the node we care about. 1465 PointerType *NewIP = PointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1466 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1467 } 1468 PointerType *New = new (*this, TypeAlignment) PointerType(T, Canonical); 1469 Types.push_back(New); 1470 PointerTypes.InsertNode(New, InsertPos); 1471 return QualType(New, 0); 1472} 1473 1474/// getBlockPointerType - Return the uniqued reference to the type for 1475/// a pointer to the specified block. 1476QualType ASTContext::getBlockPointerType(QualType T) const { 1477 assert(T->isFunctionType() && "block of function types only"); 1478 // Unique pointers, to guarantee there is only one block of a particular 1479 // structure. 1480 llvm::FoldingSetNodeID ID; 1481 BlockPointerType::Profile(ID, T); 1482 1483 void *InsertPos = 0; 1484 if (BlockPointerType *PT = 1485 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1486 return QualType(PT, 0); 1487 1488 // If the block pointee type isn't canonical, this won't be a canonical 1489 // type either so fill in the canonical type field. 1490 QualType Canonical; 1491 if (!T.isCanonical()) { 1492 Canonical = getBlockPointerType(getCanonicalType(T)); 1493 1494 // Get the new insert position for the node we care about. 1495 BlockPointerType *NewIP = 1496 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1497 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1498 } 1499 BlockPointerType *New 1500 = new (*this, TypeAlignment) BlockPointerType(T, Canonical); 1501 Types.push_back(New); 1502 BlockPointerTypes.InsertNode(New, InsertPos); 1503 return QualType(New, 0); 1504} 1505 1506/// getLValueReferenceType - Return the uniqued reference to the type for an 1507/// lvalue reference to the specified type. 1508QualType 1509ASTContext::getLValueReferenceType(QualType T, bool SpelledAsLValue) const { 1510 assert(getCanonicalType(T) != OverloadTy && 1511 "Unresolved overloaded function type"); 1512 1513 // Unique pointers, to guarantee there is only one pointer of a particular 1514 // structure. 1515 llvm::FoldingSetNodeID ID; 1516 ReferenceType::Profile(ID, T, SpelledAsLValue); 1517 1518 void *InsertPos = 0; 1519 if (LValueReferenceType *RT = 1520 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1521 return QualType(RT, 0); 1522 1523 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1524 1525 // If the referencee type isn't canonical, this won't be a canonical type 1526 // either, so fill in the canonical type field. 1527 QualType Canonical; 1528 if (!SpelledAsLValue || InnerRef || !T.isCanonical()) { 1529 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1530 Canonical = getLValueReferenceType(getCanonicalType(PointeeType)); 1531 1532 // Get the new insert position for the node we care about. 1533 LValueReferenceType *NewIP = 1534 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1535 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1536 } 1537 1538 LValueReferenceType *New 1539 = new (*this, TypeAlignment) LValueReferenceType(T, Canonical, 1540 SpelledAsLValue); 1541 Types.push_back(New); 1542 LValueReferenceTypes.InsertNode(New, InsertPos); 1543 1544 return QualType(New, 0); 1545} 1546 1547/// getRValueReferenceType - Return the uniqued reference to the type for an 1548/// rvalue reference to the specified type. 1549QualType ASTContext::getRValueReferenceType(QualType T) const { 1550 // Unique pointers, to guarantee there is only one pointer of a particular 1551 // structure. 1552 llvm::FoldingSetNodeID ID; 1553 ReferenceType::Profile(ID, T, false); 1554 1555 void *InsertPos = 0; 1556 if (RValueReferenceType *RT = 1557 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1558 return QualType(RT, 0); 1559 1560 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1561 1562 // If the referencee type isn't canonical, this won't be a canonical type 1563 // either, so fill in the canonical type field. 1564 QualType Canonical; 1565 if (InnerRef || !T.isCanonical()) { 1566 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1567 Canonical = getRValueReferenceType(getCanonicalType(PointeeType)); 1568 1569 // Get the new insert position for the node we care about. 1570 RValueReferenceType *NewIP = 1571 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1572 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1573 } 1574 1575 RValueReferenceType *New 1576 = new (*this, TypeAlignment) RValueReferenceType(T, Canonical); 1577 Types.push_back(New); 1578 RValueReferenceTypes.InsertNode(New, InsertPos); 1579 return QualType(New, 0); 1580} 1581 1582/// getMemberPointerType - Return the uniqued reference to the type for a 1583/// member pointer to the specified type, in the specified class. 1584QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls) const { 1585 // Unique pointers, to guarantee there is only one pointer of a particular 1586 // structure. 1587 llvm::FoldingSetNodeID ID; 1588 MemberPointerType::Profile(ID, T, Cls); 1589 1590 void *InsertPos = 0; 1591 if (MemberPointerType *PT = 1592 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1593 return QualType(PT, 0); 1594 1595 // If the pointee or class type isn't canonical, this won't be a canonical 1596 // type either, so fill in the canonical type field. 1597 QualType Canonical; 1598 if (!T.isCanonical() || !Cls->isCanonicalUnqualified()) { 1599 Canonical = getMemberPointerType(getCanonicalType(T),getCanonicalType(Cls)); 1600 1601 // Get the new insert position for the node we care about. 1602 MemberPointerType *NewIP = 1603 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1604 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1605 } 1606 MemberPointerType *New 1607 = new (*this, TypeAlignment) MemberPointerType(T, Cls, Canonical); 1608 Types.push_back(New); 1609 MemberPointerTypes.InsertNode(New, InsertPos); 1610 return QualType(New, 0); 1611} 1612 1613/// getConstantArrayType - Return the unique reference to the type for an 1614/// array of the specified element type. 1615QualType ASTContext::getConstantArrayType(QualType EltTy, 1616 const llvm::APInt &ArySizeIn, 1617 ArrayType::ArraySizeModifier ASM, 1618 unsigned IndexTypeQuals) const { 1619 assert((EltTy->isDependentType() || 1620 EltTy->isIncompleteType() || EltTy->isConstantSizeType()) && 1621 "Constant array of VLAs is illegal!"); 1622 1623 // Convert the array size into a canonical width matching the pointer size for 1624 // the target. 1625 llvm::APInt ArySize(ArySizeIn); 1626 ArySize = 1627 ArySize.zextOrTrunc(Target->getPointerWidth(getTargetAddressSpace(EltTy))); 1628 1629 llvm::FoldingSetNodeID ID; 1630 ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, IndexTypeQuals); 1631 1632 void *InsertPos = 0; 1633 if (ConstantArrayType *ATP = 1634 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1635 return QualType(ATP, 0); 1636 1637 // If the element type isn't canonical or has qualifiers, this won't 1638 // be a canonical type either, so fill in the canonical type field. 1639 QualType Canon; 1640 if (!EltTy.isCanonical() || EltTy.hasLocalQualifiers()) { 1641 SplitQualType canonSplit = getCanonicalType(EltTy).split(); 1642 Canon = getConstantArrayType(QualType(canonSplit.first, 0), ArySize, 1643 ASM, IndexTypeQuals); 1644 Canon = getQualifiedType(Canon, canonSplit.second); 1645 1646 // Get the new insert position for the node we care about. 1647 ConstantArrayType *NewIP = 1648 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1649 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1650 } 1651 1652 ConstantArrayType *New = new(*this,TypeAlignment) 1653 ConstantArrayType(EltTy, Canon, ArySize, ASM, IndexTypeQuals); 1654 ConstantArrayTypes.InsertNode(New, InsertPos); 1655 Types.push_back(New); 1656 return QualType(New, 0); 1657} 1658 1659/// getVariableArrayDecayedType - Turns the given type, which may be 1660/// variably-modified, into the corresponding type with all the known 1661/// sizes replaced with [*]. 1662QualType ASTContext::getVariableArrayDecayedType(QualType type) const { 1663 // Vastly most common case. 1664 if (!type->isVariablyModifiedType()) return type; 1665 1666 QualType result; 1667 1668 SplitQualType split = type.getSplitDesugaredType(); 1669 const Type *ty = split.first; 1670 switch (ty->getTypeClass()) { 1671#define TYPE(Class, Base) 1672#define ABSTRACT_TYPE(Class, Base) 1673#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 1674#include "clang/AST/TypeNodes.def" 1675 llvm_unreachable("didn't desugar past all non-canonical types?"); 1676 1677 // These types should never be variably-modified. 1678 case Type::Builtin: 1679 case Type::Complex: 1680 case Type::Vector: 1681 case Type::ExtVector: 1682 case Type::DependentSizedExtVector: 1683 case Type::ObjCObject: 1684 case Type::ObjCInterface: 1685 case Type::ObjCObjectPointer: 1686 case Type::Record: 1687 case Type::Enum: 1688 case Type::UnresolvedUsing: 1689 case Type::TypeOfExpr: 1690 case Type::TypeOf: 1691 case Type::Decltype: 1692 case Type::UnaryTransform: 1693 case Type::DependentName: 1694 case Type::InjectedClassName: 1695 case Type::TemplateSpecialization: 1696 case Type::DependentTemplateSpecialization: 1697 case Type::TemplateTypeParm: 1698 case Type::SubstTemplateTypeParmPack: 1699 case Type::Auto: 1700 case Type::PackExpansion: 1701 llvm_unreachable("type should never be variably-modified"); 1702 1703 // These types can be variably-modified but should never need to 1704 // further decay. 1705 case Type::FunctionNoProto: 1706 case Type::FunctionProto: 1707 case Type::BlockPointer: 1708 case Type::MemberPointer: 1709 return type; 1710 1711 // These types can be variably-modified. All these modifications 1712 // preserve structure except as noted by comments. 1713 // TODO: if we ever care about optimizing VLAs, there are no-op 1714 // optimizations available here. 1715 case Type::Pointer: 1716 result = getPointerType(getVariableArrayDecayedType( 1717 cast<PointerType>(ty)->getPointeeType())); 1718 break; 1719 1720 case Type::LValueReference: { 1721 const LValueReferenceType *lv = cast<LValueReferenceType>(ty); 1722 result = getLValueReferenceType( 1723 getVariableArrayDecayedType(lv->getPointeeType()), 1724 lv->isSpelledAsLValue()); 1725 break; 1726 } 1727 1728 case Type::RValueReference: { 1729 const RValueReferenceType *lv = cast<RValueReferenceType>(ty); 1730 result = getRValueReferenceType( 1731 getVariableArrayDecayedType(lv->getPointeeType())); 1732 break; 1733 } 1734 1735 case Type::Atomic: { 1736 const AtomicType *at = cast<AtomicType>(ty); 1737 result = getAtomicType(getVariableArrayDecayedType(at->getValueType())); 1738 break; 1739 } 1740 1741 case Type::ConstantArray: { 1742 const ConstantArrayType *cat = cast<ConstantArrayType>(ty); 1743 result = getConstantArrayType( 1744 getVariableArrayDecayedType(cat->getElementType()), 1745 cat->getSize(), 1746 cat->getSizeModifier(), 1747 cat->getIndexTypeCVRQualifiers()); 1748 break; 1749 } 1750 1751 case Type::DependentSizedArray: { 1752 const DependentSizedArrayType *dat = cast<DependentSizedArrayType>(ty); 1753 result = getDependentSizedArrayType( 1754 getVariableArrayDecayedType(dat->getElementType()), 1755 dat->getSizeExpr(), 1756 dat->getSizeModifier(), 1757 dat->getIndexTypeCVRQualifiers(), 1758 dat->getBracketsRange()); 1759 break; 1760 } 1761 1762 // Turn incomplete types into [*] types. 1763 case Type::IncompleteArray: { 1764 const IncompleteArrayType *iat = cast<IncompleteArrayType>(ty); 1765 result = getVariableArrayType( 1766 getVariableArrayDecayedType(iat->getElementType()), 1767 /*size*/ 0, 1768 ArrayType::Normal, 1769 iat->getIndexTypeCVRQualifiers(), 1770 SourceRange()); 1771 break; 1772 } 1773 1774 // Turn VLA types into [*] types. 1775 case Type::VariableArray: { 1776 const VariableArrayType *vat = cast<VariableArrayType>(ty); 1777 result = getVariableArrayType( 1778 getVariableArrayDecayedType(vat->getElementType()), 1779 /*size*/ 0, 1780 ArrayType::Star, 1781 vat->getIndexTypeCVRQualifiers(), 1782 vat->getBracketsRange()); 1783 break; 1784 } 1785 } 1786 1787 // Apply the top-level qualifiers from the original. 1788 return getQualifiedType(result, split.second); 1789} 1790 1791/// getVariableArrayType - Returns a non-unique reference to the type for a 1792/// variable array of the specified element type. 1793QualType ASTContext::getVariableArrayType(QualType EltTy, 1794 Expr *NumElts, 1795 ArrayType::ArraySizeModifier ASM, 1796 unsigned IndexTypeQuals, 1797 SourceRange Brackets) const { 1798 // Since we don't unique expressions, it isn't possible to unique VLA's 1799 // that have an expression provided for their size. 1800 QualType Canon; 1801 1802 // Be sure to pull qualifiers off the element type. 1803 if (!EltTy.isCanonical() || EltTy.hasLocalQualifiers()) { 1804 SplitQualType canonSplit = getCanonicalType(EltTy).split(); 1805 Canon = getVariableArrayType(QualType(canonSplit.first, 0), NumElts, ASM, 1806 IndexTypeQuals, Brackets); 1807 Canon = getQualifiedType(Canon, canonSplit.second); 1808 } 1809 1810 VariableArrayType *New = new(*this, TypeAlignment) 1811 VariableArrayType(EltTy, Canon, NumElts, ASM, IndexTypeQuals, Brackets); 1812 1813 VariableArrayTypes.push_back(New); 1814 Types.push_back(New); 1815 return QualType(New, 0); 1816} 1817 1818/// getDependentSizedArrayType - Returns a non-unique reference to 1819/// the type for a dependently-sized array of the specified element 1820/// type. 1821QualType ASTContext::getDependentSizedArrayType(QualType elementType, 1822 Expr *numElements, 1823 ArrayType::ArraySizeModifier ASM, 1824 unsigned elementTypeQuals, 1825 SourceRange brackets) const { 1826 assert((!numElements || numElements->isTypeDependent() || 1827 numElements->isValueDependent()) && 1828 "Size must be type- or value-dependent!"); 1829 1830 // Dependently-sized array types that do not have a specified number 1831 // of elements will have their sizes deduced from a dependent 1832 // initializer. We do no canonicalization here at all, which is okay 1833 // because they can't be used in most locations. 1834 if (!numElements) { 1835 DependentSizedArrayType *newType 1836 = new (*this, TypeAlignment) 1837 DependentSizedArrayType(*this, elementType, QualType(), 1838 numElements, ASM, elementTypeQuals, 1839 brackets); 1840 Types.push_back(newType); 1841 return QualType(newType, 0); 1842 } 1843 1844 // Otherwise, we actually build a new type every time, but we 1845 // also build a canonical type. 1846 1847 SplitQualType canonElementType = getCanonicalType(elementType).split(); 1848 1849 void *insertPos = 0; 1850 llvm::FoldingSetNodeID ID; 1851 DependentSizedArrayType::Profile(ID, *this, 1852 QualType(canonElementType.first, 0), 1853 ASM, elementTypeQuals, numElements); 1854 1855 // Look for an existing type with these properties. 1856 DependentSizedArrayType *canonTy = 1857 DependentSizedArrayTypes.FindNodeOrInsertPos(ID, insertPos); 1858 1859 // If we don't have one, build one. 1860 if (!canonTy) { 1861 canonTy = new (*this, TypeAlignment) 1862 DependentSizedArrayType(*this, QualType(canonElementType.first, 0), 1863 QualType(), numElements, ASM, elementTypeQuals, 1864 brackets); 1865 DependentSizedArrayTypes.InsertNode(canonTy, insertPos); 1866 Types.push_back(canonTy); 1867 } 1868 1869 // Apply qualifiers from the element type to the array. 1870 QualType canon = getQualifiedType(QualType(canonTy,0), 1871 canonElementType.second); 1872 1873 // If we didn't need extra canonicalization for the element type, 1874 // then just use that as our result. 1875 if (QualType(canonElementType.first, 0) == elementType) 1876 return canon; 1877 1878 // Otherwise, we need to build a type which follows the spelling 1879 // of the element type. 1880 DependentSizedArrayType *sugaredType 1881 = new (*this, TypeAlignment) 1882 DependentSizedArrayType(*this, elementType, canon, numElements, 1883 ASM, elementTypeQuals, brackets); 1884 Types.push_back(sugaredType); 1885 return QualType(sugaredType, 0); 1886} 1887 1888QualType ASTContext::getIncompleteArrayType(QualType elementType, 1889 ArrayType::ArraySizeModifier ASM, 1890 unsigned elementTypeQuals) const { 1891 llvm::FoldingSetNodeID ID; 1892 IncompleteArrayType::Profile(ID, elementType, ASM, elementTypeQuals); 1893 1894 void *insertPos = 0; 1895 if (IncompleteArrayType *iat = 1896 IncompleteArrayTypes.FindNodeOrInsertPos(ID, insertPos)) 1897 return QualType(iat, 0); 1898 1899 // If the element type isn't canonical, this won't be a canonical type 1900 // either, so fill in the canonical type field. We also have to pull 1901 // qualifiers off the element type. 1902 QualType canon; 1903 1904 if (!elementType.isCanonical() || elementType.hasLocalQualifiers()) { 1905 SplitQualType canonSplit = getCanonicalType(elementType).split(); 1906 canon = getIncompleteArrayType(QualType(canonSplit.first, 0), 1907 ASM, elementTypeQuals); 1908 canon = getQualifiedType(canon, canonSplit.second); 1909 1910 // Get the new insert position for the node we care about. 1911 IncompleteArrayType *existing = 1912 IncompleteArrayTypes.FindNodeOrInsertPos(ID, insertPos); 1913 assert(!existing && "Shouldn't be in the map!"); (void) existing; 1914 } 1915 1916 IncompleteArrayType *newType = new (*this, TypeAlignment) 1917 IncompleteArrayType(elementType, canon, ASM, elementTypeQuals); 1918 1919 IncompleteArrayTypes.InsertNode(newType, insertPos); 1920 Types.push_back(newType); 1921 return QualType(newType, 0); 1922} 1923 1924/// getVectorType - Return the unique reference to a vector type of 1925/// the specified element type and size. VectorType must be a built-in type. 1926QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts, 1927 VectorType::VectorKind VecKind) const { 1928 assert(vecType->isBuiltinType()); 1929 1930 // Check if we've already instantiated a vector of this type. 1931 llvm::FoldingSetNodeID ID; 1932 VectorType::Profile(ID, vecType, NumElts, Type::Vector, VecKind); 1933 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 = getVectorType(getCanonicalType(vecType), NumElts, VecKind); 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 VectorType *New = new (*this, TypeAlignment) 1949 VectorType(vecType, NumElts, Canonical, VecKind); 1950 VectorTypes.InsertNode(New, InsertPos); 1951 Types.push_back(New); 1952 return QualType(New, 0); 1953} 1954 1955/// getExtVectorType - Return the unique reference to an extended vector type of 1956/// the specified element type and size. VectorType must be a built-in type. 1957QualType 1958ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) const { 1959 assert(vecType->isBuiltinType() || vecType->isDependentType()); 1960 1961 // Check if we've already instantiated a vector of this type. 1962 llvm::FoldingSetNodeID ID; 1963 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector, 1964 VectorType::GenericVector); 1965 void *InsertPos = 0; 1966 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1967 return QualType(VTP, 0); 1968 1969 // If the element type isn't canonical, this won't be a canonical type either, 1970 // so fill in the canonical type field. 1971 QualType Canonical; 1972 if (!vecType.isCanonical()) { 1973 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts); 1974 1975 // Get the new insert position for the node we care about. 1976 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1977 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1978 } 1979 ExtVectorType *New = new (*this, TypeAlignment) 1980 ExtVectorType(vecType, NumElts, Canonical); 1981 VectorTypes.InsertNode(New, InsertPos); 1982 Types.push_back(New); 1983 return QualType(New, 0); 1984} 1985 1986QualType 1987ASTContext::getDependentSizedExtVectorType(QualType vecType, 1988 Expr *SizeExpr, 1989 SourceLocation AttrLoc) const { 1990 llvm::FoldingSetNodeID ID; 1991 DependentSizedExtVectorType::Profile(ID, *this, getCanonicalType(vecType), 1992 SizeExpr); 1993 1994 void *InsertPos = 0; 1995 DependentSizedExtVectorType *Canon 1996 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1997 DependentSizedExtVectorType *New; 1998 if (Canon) { 1999 // We already have a canonical version of this array type; use it as 2000 // the canonical type for a newly-built type. 2001 New = new (*this, TypeAlignment) 2002 DependentSizedExtVectorType(*this, vecType, QualType(Canon, 0), 2003 SizeExpr, AttrLoc); 2004 } else { 2005 QualType CanonVecTy = getCanonicalType(vecType); 2006 if (CanonVecTy == vecType) { 2007 New = new (*this, TypeAlignment) 2008 DependentSizedExtVectorType(*this, vecType, QualType(), SizeExpr, 2009 AttrLoc); 2010 2011 DependentSizedExtVectorType *CanonCheck 2012 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 2013 assert(!CanonCheck && "Dependent-sized ext_vector canonical type broken"); 2014 (void)CanonCheck; 2015 DependentSizedExtVectorTypes.InsertNode(New, InsertPos); 2016 } else { 2017 QualType Canon = getDependentSizedExtVectorType(CanonVecTy, SizeExpr, 2018 SourceLocation()); 2019 New = new (*this, TypeAlignment) 2020 DependentSizedExtVectorType(*this, vecType, Canon, SizeExpr, AttrLoc); 2021 } 2022 } 2023 2024 Types.push_back(New); 2025 return QualType(New, 0); 2026} 2027 2028/// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 2029/// 2030QualType 2031ASTContext::getFunctionNoProtoType(QualType ResultTy, 2032 const FunctionType::ExtInfo &Info) const { 2033 const CallingConv DefaultCC = Info.getCC(); 2034 const CallingConv CallConv = (LangOpts.MRTD && DefaultCC == CC_Default) ? 2035 CC_X86StdCall : DefaultCC; 2036 // Unique functions, to guarantee there is only one function of a particular 2037 // structure. 2038 llvm::FoldingSetNodeID ID; 2039 FunctionNoProtoType::Profile(ID, ResultTy, Info); 2040 2041 void *InsertPos = 0; 2042 if (FunctionNoProtoType *FT = 2043 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 2044 return QualType(FT, 0); 2045 2046 QualType Canonical; 2047 if (!ResultTy.isCanonical() || 2048 getCanonicalCallConv(CallConv) != CallConv) { 2049 Canonical = 2050 getFunctionNoProtoType(getCanonicalType(ResultTy), 2051 Info.withCallingConv(getCanonicalCallConv(CallConv))); 2052 2053 // Get the new insert position for the node we care about. 2054 FunctionNoProtoType *NewIP = 2055 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 2056 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 2057 } 2058 2059 FunctionProtoType::ExtInfo newInfo = Info.withCallingConv(CallConv); 2060 FunctionNoProtoType *New = new (*this, TypeAlignment) 2061 FunctionNoProtoType(ResultTy, Canonical, newInfo); 2062 Types.push_back(New); 2063 FunctionNoProtoTypes.InsertNode(New, InsertPos); 2064 return QualType(New, 0); 2065} 2066 2067/// getFunctionType - Return a normal function type with a typed argument 2068/// list. isVariadic indicates whether the argument list includes '...'. 2069QualType 2070ASTContext::getFunctionType(QualType ResultTy, 2071 const QualType *ArgArray, unsigned NumArgs, 2072 const FunctionProtoType::ExtProtoInfo &EPI) const { 2073 // Unique functions, to guarantee there is only one function of a particular 2074 // structure. 2075 llvm::FoldingSetNodeID ID; 2076 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, EPI, *this); 2077 2078 void *InsertPos = 0; 2079 if (FunctionProtoType *FTP = 2080 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 2081 return QualType(FTP, 0); 2082 2083 // Determine whether the type being created is already canonical or not. 2084 bool isCanonical= EPI.ExceptionSpecType == EST_None && ResultTy.isCanonical(); 2085 for (unsigned i = 0; i != NumArgs && isCanonical; ++i) 2086 if (!ArgArray[i].isCanonicalAsParam()) 2087 isCanonical = false; 2088 2089 const CallingConv DefaultCC = EPI.ExtInfo.getCC(); 2090 const CallingConv CallConv = (LangOpts.MRTD && DefaultCC == CC_Default) ? 2091 CC_X86StdCall : DefaultCC; 2092 2093 // If this type isn't canonical, get the canonical version of it. 2094 // The exception spec is not part of the canonical type. 2095 QualType Canonical; 2096 if (!isCanonical || getCanonicalCallConv(CallConv) != CallConv) { 2097 SmallVector<QualType, 16> CanonicalArgs; 2098 CanonicalArgs.reserve(NumArgs); 2099 for (unsigned i = 0; i != NumArgs; ++i) 2100 CanonicalArgs.push_back(getCanonicalParamType(ArgArray[i])); 2101 2102 FunctionProtoType::ExtProtoInfo CanonicalEPI = EPI; 2103 CanonicalEPI.ExceptionSpecType = EST_None; 2104 CanonicalEPI.NumExceptions = 0; 2105 CanonicalEPI.ExtInfo 2106 = CanonicalEPI.ExtInfo.withCallingConv(getCanonicalCallConv(CallConv)); 2107 2108 Canonical = getFunctionType(getCanonicalType(ResultTy), 2109 CanonicalArgs.data(), NumArgs, 2110 CanonicalEPI); 2111 2112 // Get the new insert position for the node we care about. 2113 FunctionProtoType *NewIP = 2114 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 2115 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 2116 } 2117 2118 // FunctionProtoType objects are allocated with extra bytes after 2119 // them for three variable size arrays at the end: 2120 // - parameter types 2121 // - exception types 2122 // - consumed-arguments flags 2123 // Instead of the exception types, there could be a noexcept 2124 // expression. 2125 size_t Size = sizeof(FunctionProtoType) + 2126 NumArgs * sizeof(QualType); 2127 if (EPI.ExceptionSpecType == EST_Dynamic) 2128 Size += EPI.NumExceptions * sizeof(QualType); 2129 else if (EPI.ExceptionSpecType == EST_ComputedNoexcept) { 2130 Size += sizeof(Expr*); 2131 } 2132 if (EPI.ConsumedArguments) 2133 Size += NumArgs * sizeof(bool); 2134 2135 FunctionProtoType *FTP = (FunctionProtoType*) Allocate(Size, TypeAlignment); 2136 FunctionProtoType::ExtProtoInfo newEPI = EPI; 2137 newEPI.ExtInfo = EPI.ExtInfo.withCallingConv(CallConv); 2138 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, Canonical, newEPI); 2139 Types.push_back(FTP); 2140 FunctionProtoTypes.InsertNode(FTP, InsertPos); 2141 return QualType(FTP, 0); 2142} 2143 2144#ifndef NDEBUG 2145static bool NeedsInjectedClassNameType(const RecordDecl *D) { 2146 if (!isa<CXXRecordDecl>(D)) return false; 2147 const CXXRecordDecl *RD = cast<CXXRecordDecl>(D); 2148 if (isa<ClassTemplatePartialSpecializationDecl>(RD)) 2149 return true; 2150 if (RD->getDescribedClassTemplate() && 2151 !isa<ClassTemplateSpecializationDecl>(RD)) 2152 return true; 2153 return false; 2154} 2155#endif 2156 2157/// getInjectedClassNameType - Return the unique reference to the 2158/// injected class name type for the specified templated declaration. 2159QualType ASTContext::getInjectedClassNameType(CXXRecordDecl *Decl, 2160 QualType TST) const { 2161 assert(NeedsInjectedClassNameType(Decl)); 2162 if (Decl->TypeForDecl) { 2163 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 2164 } else if (CXXRecordDecl *PrevDecl = Decl->getPreviousDeclaration()) { 2165 assert(PrevDecl->TypeForDecl && "previous declaration has no type"); 2166 Decl->TypeForDecl = PrevDecl->TypeForDecl; 2167 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 2168 } else { 2169 Type *newType = 2170 new (*this, TypeAlignment) InjectedClassNameType(Decl, TST); 2171 Decl->TypeForDecl = newType; 2172 Types.push_back(newType); 2173 } 2174 return QualType(Decl->TypeForDecl, 0); 2175} 2176 2177/// getTypeDeclType - Return the unique reference to the type for the 2178/// specified type declaration. 2179QualType ASTContext::getTypeDeclTypeSlow(const TypeDecl *Decl) const { 2180 assert(Decl && "Passed null for Decl param"); 2181 assert(!Decl->TypeForDecl && "TypeForDecl present in slow case"); 2182 2183 if (const TypedefNameDecl *Typedef = dyn_cast<TypedefNameDecl>(Decl)) 2184 return getTypedefType(Typedef); 2185 2186 assert(!isa<TemplateTypeParmDecl>(Decl) && 2187 "Template type parameter types are always available."); 2188 2189 if (const RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) { 2190 assert(!Record->getPreviousDeclaration() && 2191 "struct/union has previous declaration"); 2192 assert(!NeedsInjectedClassNameType(Record)); 2193 return getRecordType(Record); 2194 } else if (const EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) { 2195 assert(!Enum->getPreviousDeclaration() && 2196 "enum has previous declaration"); 2197 return getEnumType(Enum); 2198 } else if (const UnresolvedUsingTypenameDecl *Using = 2199 dyn_cast<UnresolvedUsingTypenameDecl>(Decl)) { 2200 Type *newType = new (*this, TypeAlignment) UnresolvedUsingType(Using); 2201 Decl->TypeForDecl = newType; 2202 Types.push_back(newType); 2203 } else 2204 llvm_unreachable("TypeDecl without a type?"); 2205 2206 return QualType(Decl->TypeForDecl, 0); 2207} 2208 2209/// getTypedefType - Return the unique reference to the type for the 2210/// specified typedef name decl. 2211QualType 2212ASTContext::getTypedefType(const TypedefNameDecl *Decl, 2213 QualType Canonical) const { 2214 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2215 2216 if (Canonical.isNull()) 2217 Canonical = getCanonicalType(Decl->getUnderlyingType()); 2218 TypedefType *newType = new(*this, TypeAlignment) 2219 TypedefType(Type::Typedef, Decl, Canonical); 2220 Decl->TypeForDecl = newType; 2221 Types.push_back(newType); 2222 return QualType(newType, 0); 2223} 2224 2225QualType ASTContext::getRecordType(const RecordDecl *Decl) const { 2226 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2227 2228 if (const RecordDecl *PrevDecl = Decl->getPreviousDeclaration()) 2229 if (PrevDecl->TypeForDecl) 2230 return QualType(Decl->TypeForDecl = PrevDecl->TypeForDecl, 0); 2231 2232 RecordType *newType = new (*this, TypeAlignment) RecordType(Decl); 2233 Decl->TypeForDecl = newType; 2234 Types.push_back(newType); 2235 return QualType(newType, 0); 2236} 2237 2238QualType ASTContext::getEnumType(const EnumDecl *Decl) const { 2239 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2240 2241 if (const EnumDecl *PrevDecl = Decl->getPreviousDeclaration()) 2242 if (PrevDecl->TypeForDecl) 2243 return QualType(Decl->TypeForDecl = PrevDecl->TypeForDecl, 0); 2244 2245 EnumType *newType = new (*this, TypeAlignment) EnumType(Decl); 2246 Decl->TypeForDecl = newType; 2247 Types.push_back(newType); 2248 return QualType(newType, 0); 2249} 2250 2251QualType ASTContext::getAttributedType(AttributedType::Kind attrKind, 2252 QualType modifiedType, 2253 QualType equivalentType) { 2254 llvm::FoldingSetNodeID id; 2255 AttributedType::Profile(id, attrKind, modifiedType, equivalentType); 2256 2257 void *insertPos = 0; 2258 AttributedType *type = AttributedTypes.FindNodeOrInsertPos(id, insertPos); 2259 if (type) return QualType(type, 0); 2260 2261 QualType canon = getCanonicalType(equivalentType); 2262 type = new (*this, TypeAlignment) 2263 AttributedType(canon, attrKind, modifiedType, equivalentType); 2264 2265 Types.push_back(type); 2266 AttributedTypes.InsertNode(type, insertPos); 2267 2268 return QualType(type, 0); 2269} 2270 2271 2272/// \brief Retrieve a substitution-result type. 2273QualType 2274ASTContext::getSubstTemplateTypeParmType(const TemplateTypeParmType *Parm, 2275 QualType Replacement) const { 2276 assert(Replacement.isCanonical() 2277 && "replacement types must always be canonical"); 2278 2279 llvm::FoldingSetNodeID ID; 2280 SubstTemplateTypeParmType::Profile(ID, Parm, Replacement); 2281 void *InsertPos = 0; 2282 SubstTemplateTypeParmType *SubstParm 2283 = SubstTemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2284 2285 if (!SubstParm) { 2286 SubstParm = new (*this, TypeAlignment) 2287 SubstTemplateTypeParmType(Parm, Replacement); 2288 Types.push_back(SubstParm); 2289 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 2290 } 2291 2292 return QualType(SubstParm, 0); 2293} 2294 2295/// \brief Retrieve a 2296QualType ASTContext::getSubstTemplateTypeParmPackType( 2297 const TemplateTypeParmType *Parm, 2298 const TemplateArgument &ArgPack) { 2299#ifndef NDEBUG 2300 for (TemplateArgument::pack_iterator P = ArgPack.pack_begin(), 2301 PEnd = ArgPack.pack_end(); 2302 P != PEnd; ++P) { 2303 assert(P->getKind() == TemplateArgument::Type &&"Pack contains a non-type"); 2304 assert(P->getAsType().isCanonical() && "Pack contains non-canonical type"); 2305 } 2306#endif 2307 2308 llvm::FoldingSetNodeID ID; 2309 SubstTemplateTypeParmPackType::Profile(ID, Parm, ArgPack); 2310 void *InsertPos = 0; 2311 if (SubstTemplateTypeParmPackType *SubstParm 2312 = SubstTemplateTypeParmPackTypes.FindNodeOrInsertPos(ID, InsertPos)) 2313 return QualType(SubstParm, 0); 2314 2315 QualType Canon; 2316 if (!Parm->isCanonicalUnqualified()) { 2317 Canon = getCanonicalType(QualType(Parm, 0)); 2318 Canon = getSubstTemplateTypeParmPackType(cast<TemplateTypeParmType>(Canon), 2319 ArgPack); 2320 SubstTemplateTypeParmPackTypes.FindNodeOrInsertPos(ID, InsertPos); 2321 } 2322 2323 SubstTemplateTypeParmPackType *SubstParm 2324 = new (*this, TypeAlignment) SubstTemplateTypeParmPackType(Parm, Canon, 2325 ArgPack); 2326 Types.push_back(SubstParm); 2327 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 2328 return QualType(SubstParm, 0); 2329} 2330 2331/// \brief Retrieve the template type parameter type for a template 2332/// parameter or parameter pack with the given depth, index, and (optionally) 2333/// name. 2334QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index, 2335 bool ParameterPack, 2336 TemplateTypeParmDecl *TTPDecl) const { 2337 llvm::FoldingSetNodeID ID; 2338 TemplateTypeParmType::Profile(ID, Depth, Index, ParameterPack, TTPDecl); 2339 void *InsertPos = 0; 2340 TemplateTypeParmType *TypeParm 2341 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2342 2343 if (TypeParm) 2344 return QualType(TypeParm, 0); 2345 2346 if (TTPDecl) { 2347 QualType Canon = getTemplateTypeParmType(Depth, Index, ParameterPack); 2348 TypeParm = new (*this, TypeAlignment) TemplateTypeParmType(TTPDecl, Canon); 2349 2350 TemplateTypeParmType *TypeCheck 2351 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2352 assert(!TypeCheck && "Template type parameter canonical type broken"); 2353 (void)TypeCheck; 2354 } else 2355 TypeParm = new (*this, TypeAlignment) 2356 TemplateTypeParmType(Depth, Index, ParameterPack); 2357 2358 Types.push_back(TypeParm); 2359 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos); 2360 2361 return QualType(TypeParm, 0); 2362} 2363 2364TypeSourceInfo * 2365ASTContext::getTemplateSpecializationTypeInfo(TemplateName Name, 2366 SourceLocation NameLoc, 2367 const TemplateArgumentListInfo &Args, 2368 QualType Underlying) const { 2369 assert(!Name.getAsDependentTemplateName() && 2370 "No dependent template names here!"); 2371 QualType TST = getTemplateSpecializationType(Name, Args, Underlying); 2372 2373 TypeSourceInfo *DI = CreateTypeSourceInfo(TST); 2374 TemplateSpecializationTypeLoc TL 2375 = cast<TemplateSpecializationTypeLoc>(DI->getTypeLoc()); 2376 TL.setTemplateNameLoc(NameLoc); 2377 TL.setLAngleLoc(Args.getLAngleLoc()); 2378 TL.setRAngleLoc(Args.getRAngleLoc()); 2379 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 2380 TL.setArgLocInfo(i, Args[i].getLocInfo()); 2381 return DI; 2382} 2383 2384QualType 2385ASTContext::getTemplateSpecializationType(TemplateName Template, 2386 const TemplateArgumentListInfo &Args, 2387 QualType Underlying) const { 2388 assert(!Template.getAsDependentTemplateName() && 2389 "No dependent template names here!"); 2390 2391 unsigned NumArgs = Args.size(); 2392 2393 SmallVector<TemplateArgument, 4> ArgVec; 2394 ArgVec.reserve(NumArgs); 2395 for (unsigned i = 0; i != NumArgs; ++i) 2396 ArgVec.push_back(Args[i].getArgument()); 2397 2398 return getTemplateSpecializationType(Template, ArgVec.data(), NumArgs, 2399 Underlying); 2400} 2401 2402QualType 2403ASTContext::getTemplateSpecializationType(TemplateName Template, 2404 const TemplateArgument *Args, 2405 unsigned NumArgs, 2406 QualType Underlying) const { 2407 assert(!Template.getAsDependentTemplateName() && 2408 "No dependent template names here!"); 2409 // Look through qualified template names. 2410 if (QualifiedTemplateName *QTN = Template.getAsQualifiedTemplateName()) 2411 Template = TemplateName(QTN->getTemplateDecl()); 2412 2413 bool isTypeAlias = 2414 Template.getAsTemplateDecl() && 2415 isa<TypeAliasTemplateDecl>(Template.getAsTemplateDecl()); 2416 2417 QualType CanonType; 2418 if (!Underlying.isNull()) 2419 CanonType = getCanonicalType(Underlying); 2420 else { 2421 assert(!isTypeAlias && 2422 "Underlying type for template alias must be computed by caller"); 2423 CanonType = getCanonicalTemplateSpecializationType(Template, Args, 2424 NumArgs); 2425 } 2426 2427 // Allocate the (non-canonical) template specialization type, but don't 2428 // try to unique it: these types typically have location information that 2429 // we don't unique and don't want to lose. 2430 void *Mem = Allocate(sizeof(TemplateSpecializationType) + 2431 sizeof(TemplateArgument) * NumArgs + 2432 (isTypeAlias ? sizeof(QualType) : 0), 2433 TypeAlignment); 2434 TemplateSpecializationType *Spec 2435 = new (Mem) TemplateSpecializationType(Template, 2436 Args, NumArgs, 2437 CanonType, 2438 isTypeAlias ? Underlying : QualType()); 2439 2440 Types.push_back(Spec); 2441 return QualType(Spec, 0); 2442} 2443 2444QualType 2445ASTContext::getCanonicalTemplateSpecializationType(TemplateName Template, 2446 const TemplateArgument *Args, 2447 unsigned NumArgs) const { 2448 assert(!Template.getAsDependentTemplateName() && 2449 "No dependent template names here!"); 2450 assert((!Template.getAsTemplateDecl() || 2451 !isa<TypeAliasTemplateDecl>(Template.getAsTemplateDecl())) && 2452 "Underlying type for template alias must be computed by caller"); 2453 2454 // Look through qualified template names. 2455 if (QualifiedTemplateName *QTN = Template.getAsQualifiedTemplateName()) 2456 Template = TemplateName(QTN->getTemplateDecl()); 2457 2458 // Build the canonical template specialization type. 2459 TemplateName CanonTemplate = getCanonicalTemplateName(Template); 2460 SmallVector<TemplateArgument, 4> CanonArgs; 2461 CanonArgs.reserve(NumArgs); 2462 for (unsigned I = 0; I != NumArgs; ++I) 2463 CanonArgs.push_back(getCanonicalTemplateArgument(Args[I])); 2464 2465 // Determine whether this canonical template specialization type already 2466 // exists. 2467 llvm::FoldingSetNodeID ID; 2468 TemplateSpecializationType::Profile(ID, CanonTemplate, 2469 CanonArgs.data(), NumArgs, *this); 2470 2471 void *InsertPos = 0; 2472 TemplateSpecializationType *Spec 2473 = TemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2474 2475 if (!Spec) { 2476 // Allocate a new canonical template specialization type. 2477 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 2478 sizeof(TemplateArgument) * NumArgs), 2479 TypeAlignment); 2480 Spec = new (Mem) TemplateSpecializationType(CanonTemplate, 2481 CanonArgs.data(), NumArgs, 2482 QualType(), QualType()); 2483 Types.push_back(Spec); 2484 TemplateSpecializationTypes.InsertNode(Spec, InsertPos); 2485 } 2486 2487 assert(Spec->isDependentType() && 2488 "Non-dependent template-id type must have a canonical type"); 2489 return QualType(Spec, 0); 2490} 2491 2492QualType 2493ASTContext::getElaboratedType(ElaboratedTypeKeyword Keyword, 2494 NestedNameSpecifier *NNS, 2495 QualType NamedType) const { 2496 llvm::FoldingSetNodeID ID; 2497 ElaboratedType::Profile(ID, Keyword, NNS, NamedType); 2498 2499 void *InsertPos = 0; 2500 ElaboratedType *T = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2501 if (T) 2502 return QualType(T, 0); 2503 2504 QualType Canon = NamedType; 2505 if (!Canon.isCanonical()) { 2506 Canon = getCanonicalType(NamedType); 2507 ElaboratedType *CheckT = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2508 assert(!CheckT && "Elaborated canonical type broken"); 2509 (void)CheckT; 2510 } 2511 2512 T = new (*this) ElaboratedType(Keyword, NNS, NamedType, Canon); 2513 Types.push_back(T); 2514 ElaboratedTypes.InsertNode(T, InsertPos); 2515 return QualType(T, 0); 2516} 2517 2518QualType 2519ASTContext::getParenType(QualType InnerType) const { 2520 llvm::FoldingSetNodeID ID; 2521 ParenType::Profile(ID, InnerType); 2522 2523 void *InsertPos = 0; 2524 ParenType *T = ParenTypes.FindNodeOrInsertPos(ID, InsertPos); 2525 if (T) 2526 return QualType(T, 0); 2527 2528 QualType Canon = InnerType; 2529 if (!Canon.isCanonical()) { 2530 Canon = getCanonicalType(InnerType); 2531 ParenType *CheckT = ParenTypes.FindNodeOrInsertPos(ID, InsertPos); 2532 assert(!CheckT && "Paren canonical type broken"); 2533 (void)CheckT; 2534 } 2535 2536 T = new (*this) ParenType(InnerType, Canon); 2537 Types.push_back(T); 2538 ParenTypes.InsertNode(T, InsertPos); 2539 return QualType(T, 0); 2540} 2541 2542QualType ASTContext::getDependentNameType(ElaboratedTypeKeyword Keyword, 2543 NestedNameSpecifier *NNS, 2544 const IdentifierInfo *Name, 2545 QualType Canon) const { 2546 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 2547 2548 if (Canon.isNull()) { 2549 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2550 ElaboratedTypeKeyword CanonKeyword = Keyword; 2551 if (Keyword == ETK_None) 2552 CanonKeyword = ETK_Typename; 2553 2554 if (CanonNNS != NNS || CanonKeyword != Keyword) 2555 Canon = getDependentNameType(CanonKeyword, CanonNNS, Name); 2556 } 2557 2558 llvm::FoldingSetNodeID ID; 2559 DependentNameType::Profile(ID, Keyword, NNS, Name); 2560 2561 void *InsertPos = 0; 2562 DependentNameType *T 2563 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 2564 if (T) 2565 return QualType(T, 0); 2566 2567 T = new (*this) DependentNameType(Keyword, NNS, Name, Canon); 2568 Types.push_back(T); 2569 DependentNameTypes.InsertNode(T, InsertPos); 2570 return QualType(T, 0); 2571} 2572 2573QualType 2574ASTContext::getDependentTemplateSpecializationType( 2575 ElaboratedTypeKeyword Keyword, 2576 NestedNameSpecifier *NNS, 2577 const IdentifierInfo *Name, 2578 const TemplateArgumentListInfo &Args) const { 2579 // TODO: avoid this copy 2580 SmallVector<TemplateArgument, 16> ArgCopy; 2581 for (unsigned I = 0, E = Args.size(); I != E; ++I) 2582 ArgCopy.push_back(Args[I].getArgument()); 2583 return getDependentTemplateSpecializationType(Keyword, NNS, Name, 2584 ArgCopy.size(), 2585 ArgCopy.data()); 2586} 2587 2588QualType 2589ASTContext::getDependentTemplateSpecializationType( 2590 ElaboratedTypeKeyword Keyword, 2591 NestedNameSpecifier *NNS, 2592 const IdentifierInfo *Name, 2593 unsigned NumArgs, 2594 const TemplateArgument *Args) const { 2595 assert((!NNS || NNS->isDependent()) && 2596 "nested-name-specifier must be dependent"); 2597 2598 llvm::FoldingSetNodeID ID; 2599 DependentTemplateSpecializationType::Profile(ID, *this, Keyword, NNS, 2600 Name, NumArgs, Args); 2601 2602 void *InsertPos = 0; 2603 DependentTemplateSpecializationType *T 2604 = DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2605 if (T) 2606 return QualType(T, 0); 2607 2608 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2609 2610 ElaboratedTypeKeyword CanonKeyword = Keyword; 2611 if (Keyword == ETK_None) CanonKeyword = ETK_Typename; 2612 2613 bool AnyNonCanonArgs = false; 2614 SmallVector<TemplateArgument, 16> CanonArgs(NumArgs); 2615 for (unsigned I = 0; I != NumArgs; ++I) { 2616 CanonArgs[I] = getCanonicalTemplateArgument(Args[I]); 2617 if (!CanonArgs[I].structurallyEquals(Args[I])) 2618 AnyNonCanonArgs = true; 2619 } 2620 2621 QualType Canon; 2622 if (AnyNonCanonArgs || CanonNNS != NNS || CanonKeyword != Keyword) { 2623 Canon = getDependentTemplateSpecializationType(CanonKeyword, CanonNNS, 2624 Name, NumArgs, 2625 CanonArgs.data()); 2626 2627 // Find the insert position again. 2628 DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2629 } 2630 2631 void *Mem = Allocate((sizeof(DependentTemplateSpecializationType) + 2632 sizeof(TemplateArgument) * NumArgs), 2633 TypeAlignment); 2634 T = new (Mem) DependentTemplateSpecializationType(Keyword, NNS, 2635 Name, NumArgs, Args, Canon); 2636 Types.push_back(T); 2637 DependentTemplateSpecializationTypes.InsertNode(T, InsertPos); 2638 return QualType(T, 0); 2639} 2640 2641QualType ASTContext::getPackExpansionType(QualType Pattern, 2642 llvm::Optional<unsigned> NumExpansions) { 2643 llvm::FoldingSetNodeID ID; 2644 PackExpansionType::Profile(ID, Pattern, NumExpansions); 2645 2646 assert(Pattern->containsUnexpandedParameterPack() && 2647 "Pack expansions must expand one or more parameter packs"); 2648 void *InsertPos = 0; 2649 PackExpansionType *T 2650 = PackExpansionTypes.FindNodeOrInsertPos(ID, InsertPos); 2651 if (T) 2652 return QualType(T, 0); 2653 2654 QualType Canon; 2655 if (!Pattern.isCanonical()) { 2656 Canon = getPackExpansionType(getCanonicalType(Pattern), NumExpansions); 2657 2658 // Find the insert position again. 2659 PackExpansionTypes.FindNodeOrInsertPos(ID, InsertPos); 2660 } 2661 2662 T = new (*this) PackExpansionType(Pattern, Canon, NumExpansions); 2663 Types.push_back(T); 2664 PackExpansionTypes.InsertNode(T, InsertPos); 2665 return QualType(T, 0); 2666} 2667 2668/// CmpProtocolNames - Comparison predicate for sorting protocols 2669/// alphabetically. 2670static bool CmpProtocolNames(const ObjCProtocolDecl *LHS, 2671 const ObjCProtocolDecl *RHS) { 2672 return LHS->getDeclName() < RHS->getDeclName(); 2673} 2674 2675static bool areSortedAndUniqued(ObjCProtocolDecl * const *Protocols, 2676 unsigned NumProtocols) { 2677 if (NumProtocols == 0) return true; 2678 2679 for (unsigned i = 1; i != NumProtocols; ++i) 2680 if (!CmpProtocolNames(Protocols[i-1], Protocols[i])) 2681 return false; 2682 return true; 2683} 2684 2685static void SortAndUniqueProtocols(ObjCProtocolDecl **Protocols, 2686 unsigned &NumProtocols) { 2687 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols; 2688 2689 // Sort protocols, keyed by name. 2690 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames); 2691 2692 // Remove duplicates. 2693 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd); 2694 NumProtocols = ProtocolsEnd-Protocols; 2695} 2696 2697QualType ASTContext::getObjCObjectType(QualType BaseType, 2698 ObjCProtocolDecl * const *Protocols, 2699 unsigned NumProtocols) const { 2700 // If the base type is an interface and there aren't any protocols 2701 // to add, then the interface type will do just fine. 2702 if (!NumProtocols && isa<ObjCInterfaceType>(BaseType)) 2703 return BaseType; 2704 2705 // Look in the folding set for an existing type. 2706 llvm::FoldingSetNodeID ID; 2707 ObjCObjectTypeImpl::Profile(ID, BaseType, Protocols, NumProtocols); 2708 void *InsertPos = 0; 2709 if (ObjCObjectType *QT = ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos)) 2710 return QualType(QT, 0); 2711 2712 // Build the canonical type, which has the canonical base type and 2713 // a sorted-and-uniqued list of protocols. 2714 QualType Canonical; 2715 bool ProtocolsSorted = areSortedAndUniqued(Protocols, NumProtocols); 2716 if (!ProtocolsSorted || !BaseType.isCanonical()) { 2717 if (!ProtocolsSorted) { 2718 SmallVector<ObjCProtocolDecl*, 8> Sorted(Protocols, 2719 Protocols + NumProtocols); 2720 unsigned UniqueCount = NumProtocols; 2721 2722 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2723 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2724 &Sorted[0], UniqueCount); 2725 } else { 2726 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2727 Protocols, NumProtocols); 2728 } 2729 2730 // Regenerate InsertPos. 2731 ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos); 2732 } 2733 2734 unsigned Size = sizeof(ObjCObjectTypeImpl); 2735 Size += NumProtocols * sizeof(ObjCProtocolDecl *); 2736 void *Mem = Allocate(Size, TypeAlignment); 2737 ObjCObjectTypeImpl *T = 2738 new (Mem) ObjCObjectTypeImpl(Canonical, BaseType, Protocols, NumProtocols); 2739 2740 Types.push_back(T); 2741 ObjCObjectTypes.InsertNode(T, InsertPos); 2742 return QualType(T, 0); 2743} 2744 2745/// getObjCObjectPointerType - Return a ObjCObjectPointerType type for 2746/// the given object type. 2747QualType ASTContext::getObjCObjectPointerType(QualType ObjectT) const { 2748 llvm::FoldingSetNodeID ID; 2749 ObjCObjectPointerType::Profile(ID, ObjectT); 2750 2751 void *InsertPos = 0; 2752 if (ObjCObjectPointerType *QT = 2753 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 2754 return QualType(QT, 0); 2755 2756 // Find the canonical object type. 2757 QualType Canonical; 2758 if (!ObjectT.isCanonical()) { 2759 Canonical = getObjCObjectPointerType(getCanonicalType(ObjectT)); 2760 2761 // Regenerate InsertPos. 2762 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 2763 } 2764 2765 // No match. 2766 void *Mem = Allocate(sizeof(ObjCObjectPointerType), TypeAlignment); 2767 ObjCObjectPointerType *QType = 2768 new (Mem) ObjCObjectPointerType(Canonical, ObjectT); 2769 2770 Types.push_back(QType); 2771 ObjCObjectPointerTypes.InsertNode(QType, InsertPos); 2772 return QualType(QType, 0); 2773} 2774 2775/// getObjCInterfaceType - Return the unique reference to the type for the 2776/// specified ObjC interface decl. The list of protocols is optional. 2777QualType ASTContext::getObjCInterfaceType(const ObjCInterfaceDecl *Decl) const { 2778 if (Decl->TypeForDecl) 2779 return QualType(Decl->TypeForDecl, 0); 2780 2781 // FIXME: redeclarations? 2782 void *Mem = Allocate(sizeof(ObjCInterfaceType), TypeAlignment); 2783 ObjCInterfaceType *T = new (Mem) ObjCInterfaceType(Decl); 2784 Decl->TypeForDecl = T; 2785 Types.push_back(T); 2786 return QualType(T, 0); 2787} 2788 2789/// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique 2790/// TypeOfExprType AST's (since expression's are never shared). For example, 2791/// multiple declarations that refer to "typeof(x)" all contain different 2792/// DeclRefExpr's. This doesn't effect the type checker, since it operates 2793/// on canonical type's (which are always unique). 2794QualType ASTContext::getTypeOfExprType(Expr *tofExpr) const { 2795 TypeOfExprType *toe; 2796 if (tofExpr->isTypeDependent()) { 2797 llvm::FoldingSetNodeID ID; 2798 DependentTypeOfExprType::Profile(ID, *this, tofExpr); 2799 2800 void *InsertPos = 0; 2801 DependentTypeOfExprType *Canon 2802 = DependentTypeOfExprTypes.FindNodeOrInsertPos(ID, InsertPos); 2803 if (Canon) { 2804 // We already have a "canonical" version of an identical, dependent 2805 // typeof(expr) type. Use that as our canonical type. 2806 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, 2807 QualType((TypeOfExprType*)Canon, 0)); 2808 } else { 2809 // Build a new, canonical typeof(expr) type. 2810 Canon 2811 = new (*this, TypeAlignment) DependentTypeOfExprType(*this, tofExpr); 2812 DependentTypeOfExprTypes.InsertNode(Canon, InsertPos); 2813 toe = Canon; 2814 } 2815 } else { 2816 QualType Canonical = getCanonicalType(tofExpr->getType()); 2817 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, Canonical); 2818 } 2819 Types.push_back(toe); 2820 return QualType(toe, 0); 2821} 2822 2823/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique 2824/// TypeOfType AST's. The only motivation to unique these nodes would be 2825/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be 2826/// an issue. This doesn't effect the type checker, since it operates 2827/// on canonical type's (which are always unique). 2828QualType ASTContext::getTypeOfType(QualType tofType) const { 2829 QualType Canonical = getCanonicalType(tofType); 2830 TypeOfType *tot = new (*this, TypeAlignment) TypeOfType(tofType, Canonical); 2831 Types.push_back(tot); 2832 return QualType(tot, 0); 2833} 2834 2835/// getDecltypeForExpr - Given an expr, will return the decltype for that 2836/// expression, according to the rules in C++0x [dcl.type.simple]p4 2837static QualType getDecltypeForExpr(const Expr *e, const ASTContext &Context) { 2838 if (e->isTypeDependent()) 2839 return Context.DependentTy; 2840 2841 // If e is an id expression or a class member access, decltype(e) is defined 2842 // as the type of the entity named by e. 2843 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(e)) { 2844 if (const ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl())) 2845 return VD->getType(); 2846 } 2847 if (const MemberExpr *ME = dyn_cast<MemberExpr>(e)) { 2848 if (const FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) 2849 return FD->getType(); 2850 } 2851 // If e is a function call or an invocation of an overloaded operator, 2852 // (parentheses around e are ignored), decltype(e) is defined as the 2853 // return type of that function. 2854 if (const CallExpr *CE = dyn_cast<CallExpr>(e->IgnoreParens())) 2855 return CE->getCallReturnType(); 2856 2857 QualType T = e->getType(); 2858 2859 // Otherwise, where T is the type of e, if e is an lvalue, decltype(e) is 2860 // defined as T&, otherwise decltype(e) is defined as T. 2861 if (e->isLValue()) 2862 T = Context.getLValueReferenceType(T); 2863 2864 return T; 2865} 2866 2867/// getDecltypeType - Unlike many "get<Type>" functions, we don't unique 2868/// DecltypeType AST's. The only motivation to unique these nodes would be 2869/// memory savings. Since decltype(t) is fairly uncommon, space shouldn't be 2870/// an issue. This doesn't effect the type checker, since it operates 2871/// on canonical type's (which are always unique). 2872QualType ASTContext::getDecltypeType(Expr *e) const { 2873 DecltypeType *dt; 2874 2875 // C++0x [temp.type]p2: 2876 // If an expression e involves a template parameter, decltype(e) denotes a 2877 // unique dependent type. Two such decltype-specifiers refer to the same 2878 // type only if their expressions are equivalent (14.5.6.1). 2879 if (e->isInstantiationDependent()) { 2880 llvm::FoldingSetNodeID ID; 2881 DependentDecltypeType::Profile(ID, *this, e); 2882 2883 void *InsertPos = 0; 2884 DependentDecltypeType *Canon 2885 = DependentDecltypeTypes.FindNodeOrInsertPos(ID, InsertPos); 2886 if (Canon) { 2887 // We already have a "canonical" version of an equivalent, dependent 2888 // decltype type. Use that as our canonical type. 2889 dt = new (*this, TypeAlignment) DecltypeType(e, DependentTy, 2890 QualType((DecltypeType*)Canon, 0)); 2891 } else { 2892 // Build a new, canonical typeof(expr) type. 2893 Canon = new (*this, TypeAlignment) DependentDecltypeType(*this, e); 2894 DependentDecltypeTypes.InsertNode(Canon, InsertPos); 2895 dt = Canon; 2896 } 2897 } else { 2898 QualType T = getDecltypeForExpr(e, *this); 2899 dt = new (*this, TypeAlignment) DecltypeType(e, T, getCanonicalType(T)); 2900 } 2901 Types.push_back(dt); 2902 return QualType(dt, 0); 2903} 2904 2905/// getUnaryTransformationType - We don't unique these, since the memory 2906/// savings are minimal and these are rare. 2907QualType ASTContext::getUnaryTransformType(QualType BaseType, 2908 QualType UnderlyingType, 2909 UnaryTransformType::UTTKind Kind) 2910 const { 2911 UnaryTransformType *Ty = 2912 new (*this, TypeAlignment) UnaryTransformType (BaseType, UnderlyingType, 2913 Kind, 2914 UnderlyingType->isDependentType() ? 2915 QualType() : UnderlyingType); 2916 Types.push_back(Ty); 2917 return QualType(Ty, 0); 2918} 2919 2920/// getAutoType - We only unique auto types after they've been deduced. 2921QualType ASTContext::getAutoType(QualType DeducedType) const { 2922 void *InsertPos = 0; 2923 if (!DeducedType.isNull()) { 2924 // Look in the folding set for an existing type. 2925 llvm::FoldingSetNodeID ID; 2926 AutoType::Profile(ID, DeducedType); 2927 if (AutoType *AT = AutoTypes.FindNodeOrInsertPos(ID, InsertPos)) 2928 return QualType(AT, 0); 2929 } 2930 2931 AutoType *AT = new (*this, TypeAlignment) AutoType(DeducedType); 2932 Types.push_back(AT); 2933 if (InsertPos) 2934 AutoTypes.InsertNode(AT, InsertPos); 2935 return QualType(AT, 0); 2936} 2937 2938/// getAtomicType - Return the uniqued reference to the atomic type for 2939/// the given value type. 2940QualType ASTContext::getAtomicType(QualType T) const { 2941 // Unique pointers, to guarantee there is only one pointer of a particular 2942 // structure. 2943 llvm::FoldingSetNodeID ID; 2944 AtomicType::Profile(ID, T); 2945 2946 void *InsertPos = 0; 2947 if (AtomicType *AT = AtomicTypes.FindNodeOrInsertPos(ID, InsertPos)) 2948 return QualType(AT, 0); 2949 2950 // If the atomic value type isn't canonical, this won't be a canonical type 2951 // either, so fill in the canonical type field. 2952 QualType Canonical; 2953 if (!T.isCanonical()) { 2954 Canonical = getAtomicType(getCanonicalType(T)); 2955 2956 // Get the new insert position for the node we care about. 2957 AtomicType *NewIP = AtomicTypes.FindNodeOrInsertPos(ID, InsertPos); 2958 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 2959 } 2960 AtomicType *New = new (*this, TypeAlignment) AtomicType(T, Canonical); 2961 Types.push_back(New); 2962 AtomicTypes.InsertNode(New, InsertPos); 2963 return QualType(New, 0); 2964} 2965 2966/// getAutoDeductType - Get type pattern for deducing against 'auto'. 2967QualType ASTContext::getAutoDeductType() const { 2968 if (AutoDeductTy.isNull()) 2969 AutoDeductTy = getAutoType(QualType()); 2970 assert(!AutoDeductTy.isNull() && "can't build 'auto' pattern"); 2971 return AutoDeductTy; 2972} 2973 2974/// getAutoRRefDeductType - Get type pattern for deducing against 'auto &&'. 2975QualType ASTContext::getAutoRRefDeductType() const { 2976 if (AutoRRefDeductTy.isNull()) 2977 AutoRRefDeductTy = getRValueReferenceType(getAutoDeductType()); 2978 assert(!AutoRRefDeductTy.isNull() && "can't build 'auto &&' pattern"); 2979 return AutoRRefDeductTy; 2980} 2981 2982/// getTagDeclType - Return the unique reference to the type for the 2983/// specified TagDecl (struct/union/class/enum) decl. 2984QualType ASTContext::getTagDeclType(const TagDecl *Decl) const { 2985 assert (Decl); 2986 // FIXME: What is the design on getTagDeclType when it requires casting 2987 // away const? mutable? 2988 return getTypeDeclType(const_cast<TagDecl*>(Decl)); 2989} 2990 2991/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result 2992/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and 2993/// needs to agree with the definition in <stddef.h>. 2994CanQualType ASTContext::getSizeType() const { 2995 return getFromTargetType(Target->getSizeType()); 2996} 2997 2998/// getSignedWCharType - Return the type of "signed wchar_t". 2999/// Used when in C++, as a GCC extension. 3000QualType ASTContext::getSignedWCharType() const { 3001 // FIXME: derive from "Target" ? 3002 return WCharTy; 3003} 3004 3005/// getUnsignedWCharType - Return the type of "unsigned wchar_t". 3006/// Used when in C++, as a GCC extension. 3007QualType ASTContext::getUnsignedWCharType() const { 3008 // FIXME: derive from "Target" ? 3009 return UnsignedIntTy; 3010} 3011 3012/// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 3013/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 3014QualType ASTContext::getPointerDiffType() const { 3015 return getFromTargetType(Target->getPtrDiffType(0)); 3016} 3017 3018//===----------------------------------------------------------------------===// 3019// Type Operators 3020//===----------------------------------------------------------------------===// 3021 3022CanQualType ASTContext::getCanonicalParamType(QualType T) const { 3023 // Push qualifiers into arrays, and then discard any remaining 3024 // qualifiers. 3025 T = getCanonicalType(T); 3026 T = getVariableArrayDecayedType(T); 3027 const Type *Ty = T.getTypePtr(); 3028 QualType Result; 3029 if (isa<ArrayType>(Ty)) { 3030 Result = getArrayDecayedType(QualType(Ty,0)); 3031 } else if (isa<FunctionType>(Ty)) { 3032 Result = getPointerType(QualType(Ty, 0)); 3033 } else { 3034 Result = QualType(Ty, 0); 3035 } 3036 3037 return CanQualType::CreateUnsafe(Result); 3038} 3039 3040QualType ASTContext::getUnqualifiedArrayType(QualType type, 3041 Qualifiers &quals) { 3042 SplitQualType splitType = type.getSplitUnqualifiedType(); 3043 3044 // FIXME: getSplitUnqualifiedType() actually walks all the way to 3045 // the unqualified desugared type and then drops it on the floor. 3046 // We then have to strip that sugar back off with 3047 // getUnqualifiedDesugaredType(), which is silly. 3048 const ArrayType *AT = 3049 dyn_cast<ArrayType>(splitType.first->getUnqualifiedDesugaredType()); 3050 3051 // If we don't have an array, just use the results in splitType. 3052 if (!AT) { 3053 quals = splitType.second; 3054 return QualType(splitType.first, 0); 3055 } 3056 3057 // Otherwise, recurse on the array's element type. 3058 QualType elementType = AT->getElementType(); 3059 QualType unqualElementType = getUnqualifiedArrayType(elementType, quals); 3060 3061 // If that didn't change the element type, AT has no qualifiers, so we 3062 // can just use the results in splitType. 3063 if (elementType == unqualElementType) { 3064 assert(quals.empty()); // from the recursive call 3065 quals = splitType.second; 3066 return QualType(splitType.first, 0); 3067 } 3068 3069 // Otherwise, add in the qualifiers from the outermost type, then 3070 // build the type back up. 3071 quals.addConsistentQualifiers(splitType.second); 3072 3073 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) { 3074 return getConstantArrayType(unqualElementType, CAT->getSize(), 3075 CAT->getSizeModifier(), 0); 3076 } 3077 3078 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) { 3079 return getIncompleteArrayType(unqualElementType, IAT->getSizeModifier(), 0); 3080 } 3081 3082 if (const VariableArrayType *VAT = dyn_cast<VariableArrayType>(AT)) { 3083 return getVariableArrayType(unqualElementType, 3084 VAT->getSizeExpr(), 3085 VAT->getSizeModifier(), 3086 VAT->getIndexTypeCVRQualifiers(), 3087 VAT->getBracketsRange()); 3088 } 3089 3090 const DependentSizedArrayType *DSAT = cast<DependentSizedArrayType>(AT); 3091 return getDependentSizedArrayType(unqualElementType, DSAT->getSizeExpr(), 3092 DSAT->getSizeModifier(), 0, 3093 SourceRange()); 3094} 3095 3096/// UnwrapSimilarPointerTypes - If T1 and T2 are pointer types that 3097/// may be similar (C++ 4.4), replaces T1 and T2 with the type that 3098/// they point to and return true. If T1 and T2 aren't pointer types 3099/// or pointer-to-member types, or if they are not similar at this 3100/// level, returns false and leaves T1 and T2 unchanged. Top-level 3101/// qualifiers on T1 and T2 are ignored. This function will typically 3102/// be called in a loop that successively "unwraps" pointer and 3103/// pointer-to-member types to compare them at each level. 3104bool ASTContext::UnwrapSimilarPointerTypes(QualType &T1, QualType &T2) { 3105 const PointerType *T1PtrType = T1->getAs<PointerType>(), 3106 *T2PtrType = T2->getAs<PointerType>(); 3107 if (T1PtrType && T2PtrType) { 3108 T1 = T1PtrType->getPointeeType(); 3109 T2 = T2PtrType->getPointeeType(); 3110 return true; 3111 } 3112 3113 const MemberPointerType *T1MPType = T1->getAs<MemberPointerType>(), 3114 *T2MPType = T2->getAs<MemberPointerType>(); 3115 if (T1MPType && T2MPType && 3116 hasSameUnqualifiedType(QualType(T1MPType->getClass(), 0), 3117 QualType(T2MPType->getClass(), 0))) { 3118 T1 = T1MPType->getPointeeType(); 3119 T2 = T2MPType->getPointeeType(); 3120 return true; 3121 } 3122 3123 if (getLangOptions().ObjC1) { 3124 const ObjCObjectPointerType *T1OPType = T1->getAs<ObjCObjectPointerType>(), 3125 *T2OPType = T2->getAs<ObjCObjectPointerType>(); 3126 if (T1OPType && T2OPType) { 3127 T1 = T1OPType->getPointeeType(); 3128 T2 = T2OPType->getPointeeType(); 3129 return true; 3130 } 3131 } 3132 3133 // FIXME: Block pointers, too? 3134 3135 return false; 3136} 3137 3138DeclarationNameInfo 3139ASTContext::getNameForTemplate(TemplateName Name, 3140 SourceLocation NameLoc) const { 3141 switch (Name.getKind()) { 3142 case TemplateName::QualifiedTemplate: 3143 case TemplateName::Template: 3144 // DNInfo work in progress: CHECKME: what about DNLoc? 3145 return DeclarationNameInfo(Name.getAsTemplateDecl()->getDeclName(), 3146 NameLoc); 3147 3148 case TemplateName::OverloadedTemplate: { 3149 OverloadedTemplateStorage *Storage = Name.getAsOverloadedTemplate(); 3150 // DNInfo work in progress: CHECKME: what about DNLoc? 3151 return DeclarationNameInfo((*Storage->begin())->getDeclName(), NameLoc); 3152 } 3153 3154 case TemplateName::DependentTemplate: { 3155 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 3156 DeclarationName DName; 3157 if (DTN->isIdentifier()) { 3158 DName = DeclarationNames.getIdentifier(DTN->getIdentifier()); 3159 return DeclarationNameInfo(DName, NameLoc); 3160 } else { 3161 DName = DeclarationNames.getCXXOperatorName(DTN->getOperator()); 3162 // DNInfo work in progress: FIXME: source locations? 3163 DeclarationNameLoc DNLoc; 3164 DNLoc.CXXOperatorName.BeginOpNameLoc = SourceLocation().getRawEncoding(); 3165 DNLoc.CXXOperatorName.EndOpNameLoc = SourceLocation().getRawEncoding(); 3166 return DeclarationNameInfo(DName, NameLoc, DNLoc); 3167 } 3168 } 3169 3170 case TemplateName::SubstTemplateTemplateParm: { 3171 SubstTemplateTemplateParmStorage *subst 3172 = Name.getAsSubstTemplateTemplateParm(); 3173 return DeclarationNameInfo(subst->getParameter()->getDeclName(), 3174 NameLoc); 3175 } 3176 3177 case TemplateName::SubstTemplateTemplateParmPack: { 3178 SubstTemplateTemplateParmPackStorage *subst 3179 = Name.getAsSubstTemplateTemplateParmPack(); 3180 return DeclarationNameInfo(subst->getParameterPack()->getDeclName(), 3181 NameLoc); 3182 } 3183 } 3184 3185 llvm_unreachable("bad template name kind!"); 3186} 3187 3188TemplateName ASTContext::getCanonicalTemplateName(TemplateName Name) const { 3189 switch (Name.getKind()) { 3190 case TemplateName::QualifiedTemplate: 3191 case TemplateName::Template: { 3192 TemplateDecl *Template = Name.getAsTemplateDecl(); 3193 if (TemplateTemplateParmDecl *TTP 3194 = dyn_cast<TemplateTemplateParmDecl>(Template)) 3195 Template = getCanonicalTemplateTemplateParmDecl(TTP); 3196 3197 // The canonical template name is the canonical template declaration. 3198 return TemplateName(cast<TemplateDecl>(Template->getCanonicalDecl())); 3199 } 3200 3201 case TemplateName::OverloadedTemplate: 3202 llvm_unreachable("cannot canonicalize overloaded template"); 3203 3204 case TemplateName::DependentTemplate: { 3205 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 3206 assert(DTN && "Non-dependent template names must refer to template decls."); 3207 return DTN->CanonicalTemplateName; 3208 } 3209 3210 case TemplateName::SubstTemplateTemplateParm: { 3211 SubstTemplateTemplateParmStorage *subst 3212 = Name.getAsSubstTemplateTemplateParm(); 3213 return getCanonicalTemplateName(subst->getReplacement()); 3214 } 3215 3216 case TemplateName::SubstTemplateTemplateParmPack: { 3217 SubstTemplateTemplateParmPackStorage *subst 3218 = Name.getAsSubstTemplateTemplateParmPack(); 3219 TemplateTemplateParmDecl *canonParameter 3220 = getCanonicalTemplateTemplateParmDecl(subst->getParameterPack()); 3221 TemplateArgument canonArgPack 3222 = getCanonicalTemplateArgument(subst->getArgumentPack()); 3223 return getSubstTemplateTemplateParmPack(canonParameter, canonArgPack); 3224 } 3225 } 3226 3227 llvm_unreachable("bad template name!"); 3228} 3229 3230bool ASTContext::hasSameTemplateName(TemplateName X, TemplateName Y) { 3231 X = getCanonicalTemplateName(X); 3232 Y = getCanonicalTemplateName(Y); 3233 return X.getAsVoidPointer() == Y.getAsVoidPointer(); 3234} 3235 3236TemplateArgument 3237ASTContext::getCanonicalTemplateArgument(const TemplateArgument &Arg) const { 3238 switch (Arg.getKind()) { 3239 case TemplateArgument::Null: 3240 return Arg; 3241 3242 case TemplateArgument::Expression: 3243 return Arg; 3244 3245 case TemplateArgument::Declaration: 3246 return TemplateArgument(Arg.getAsDecl()->getCanonicalDecl()); 3247 3248 case TemplateArgument::Template: 3249 return TemplateArgument(getCanonicalTemplateName(Arg.getAsTemplate())); 3250 3251 case TemplateArgument::TemplateExpansion: 3252 return TemplateArgument(getCanonicalTemplateName( 3253 Arg.getAsTemplateOrTemplatePattern()), 3254 Arg.getNumTemplateExpansions()); 3255 3256 case TemplateArgument::Integral: 3257 return TemplateArgument(*Arg.getAsIntegral(), 3258 getCanonicalType(Arg.getIntegralType())); 3259 3260 case TemplateArgument::Type: 3261 return TemplateArgument(getCanonicalType(Arg.getAsType())); 3262 3263 case TemplateArgument::Pack: { 3264 if (Arg.pack_size() == 0) 3265 return Arg; 3266 3267 TemplateArgument *CanonArgs 3268 = new (*this) TemplateArgument[Arg.pack_size()]; 3269 unsigned Idx = 0; 3270 for (TemplateArgument::pack_iterator A = Arg.pack_begin(), 3271 AEnd = Arg.pack_end(); 3272 A != AEnd; (void)++A, ++Idx) 3273 CanonArgs[Idx] = getCanonicalTemplateArgument(*A); 3274 3275 return TemplateArgument(CanonArgs, Arg.pack_size()); 3276 } 3277 } 3278 3279 // Silence GCC warning 3280 llvm_unreachable("Unhandled template argument kind"); 3281} 3282 3283NestedNameSpecifier * 3284ASTContext::getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) const { 3285 if (!NNS) 3286 return 0; 3287 3288 switch (NNS->getKind()) { 3289 case NestedNameSpecifier::Identifier: 3290 // Canonicalize the prefix but keep the identifier the same. 3291 return NestedNameSpecifier::Create(*this, 3292 getCanonicalNestedNameSpecifier(NNS->getPrefix()), 3293 NNS->getAsIdentifier()); 3294 3295 case NestedNameSpecifier::Namespace: 3296 // A namespace is canonical; build a nested-name-specifier with 3297 // this namespace and no prefix. 3298 return NestedNameSpecifier::Create(*this, 0, 3299 NNS->getAsNamespace()->getOriginalNamespace()); 3300 3301 case NestedNameSpecifier::NamespaceAlias: 3302 // A namespace is canonical; build a nested-name-specifier with 3303 // this namespace and no prefix. 3304 return NestedNameSpecifier::Create(*this, 0, 3305 NNS->getAsNamespaceAlias()->getNamespace() 3306 ->getOriginalNamespace()); 3307 3308 case NestedNameSpecifier::TypeSpec: 3309 case NestedNameSpecifier::TypeSpecWithTemplate: { 3310 QualType T = getCanonicalType(QualType(NNS->getAsType(), 0)); 3311 3312 // If we have some kind of dependent-named type (e.g., "typename T::type"), 3313 // break it apart into its prefix and identifier, then reconsititute those 3314 // as the canonical nested-name-specifier. This is required to canonicalize 3315 // a dependent nested-name-specifier involving typedefs of dependent-name 3316 // types, e.g., 3317 // typedef typename T::type T1; 3318 // typedef typename T1::type T2; 3319 if (const DependentNameType *DNT = T->getAs<DependentNameType>()) { 3320 NestedNameSpecifier *Prefix 3321 = getCanonicalNestedNameSpecifier(DNT->getQualifier()); 3322 return NestedNameSpecifier::Create(*this, Prefix, 3323 const_cast<IdentifierInfo *>(DNT->getIdentifier())); 3324 } 3325 3326 // Do the same thing as above, but with dependent-named specializations. 3327 if (const DependentTemplateSpecializationType *DTST 3328 = T->getAs<DependentTemplateSpecializationType>()) { 3329 NestedNameSpecifier *Prefix 3330 = getCanonicalNestedNameSpecifier(DTST->getQualifier()); 3331 3332 T = getDependentTemplateSpecializationType(DTST->getKeyword(), 3333 Prefix, DTST->getIdentifier(), 3334 DTST->getNumArgs(), 3335 DTST->getArgs()); 3336 T = getCanonicalType(T); 3337 } 3338 3339 return NestedNameSpecifier::Create(*this, 0, false, 3340 const_cast<Type*>(T.getTypePtr())); 3341 } 3342 3343 case NestedNameSpecifier::Global: 3344 // The global specifier is canonical and unique. 3345 return NNS; 3346 } 3347 3348 // Required to silence a GCC warning 3349 return 0; 3350} 3351 3352 3353const ArrayType *ASTContext::getAsArrayType(QualType T) const { 3354 // Handle the non-qualified case efficiently. 3355 if (!T.hasLocalQualifiers()) { 3356 // Handle the common positive case fast. 3357 if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 3358 return AT; 3359 } 3360 3361 // Handle the common negative case fast. 3362 if (!isa<ArrayType>(T.getCanonicalType())) 3363 return 0; 3364 3365 // Apply any qualifiers from the array type to the element type. This 3366 // implements C99 6.7.3p8: "If the specification of an array type includes 3367 // any type qualifiers, the element type is so qualified, not the array type." 3368 3369 // If we get here, we either have type qualifiers on the type, or we have 3370 // sugar such as a typedef in the way. If we have type qualifiers on the type 3371 // we must propagate them down into the element type. 3372 3373 SplitQualType split = T.getSplitDesugaredType(); 3374 Qualifiers qs = split.second; 3375 3376 // If we have a simple case, just return now. 3377 const ArrayType *ATy = dyn_cast<ArrayType>(split.first); 3378 if (ATy == 0 || qs.empty()) 3379 return ATy; 3380 3381 // Otherwise, we have an array and we have qualifiers on it. Push the 3382 // qualifiers into the array element type and return a new array type. 3383 QualType NewEltTy = getQualifiedType(ATy->getElementType(), qs); 3384 3385 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy)) 3386 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(), 3387 CAT->getSizeModifier(), 3388 CAT->getIndexTypeCVRQualifiers())); 3389 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy)) 3390 return cast<ArrayType>(getIncompleteArrayType(NewEltTy, 3391 IAT->getSizeModifier(), 3392 IAT->getIndexTypeCVRQualifiers())); 3393 3394 if (const DependentSizedArrayType *DSAT 3395 = dyn_cast<DependentSizedArrayType>(ATy)) 3396 return cast<ArrayType>( 3397 getDependentSizedArrayType(NewEltTy, 3398 DSAT->getSizeExpr(), 3399 DSAT->getSizeModifier(), 3400 DSAT->getIndexTypeCVRQualifiers(), 3401 DSAT->getBracketsRange())); 3402 3403 const VariableArrayType *VAT = cast<VariableArrayType>(ATy); 3404 return cast<ArrayType>(getVariableArrayType(NewEltTy, 3405 VAT->getSizeExpr(), 3406 VAT->getSizeModifier(), 3407 VAT->getIndexTypeCVRQualifiers(), 3408 VAT->getBracketsRange())); 3409} 3410 3411QualType ASTContext::getAdjustedParameterType(QualType T) { 3412 // C99 6.7.5.3p7: 3413 // A declaration of a parameter as "array of type" shall be 3414 // adjusted to "qualified pointer to type", where the type 3415 // qualifiers (if any) are those specified within the [ and ] of 3416 // the array type derivation. 3417 if (T->isArrayType()) 3418 return getArrayDecayedType(T); 3419 3420 // C99 6.7.5.3p8: 3421 // A declaration of a parameter as "function returning type" 3422 // shall be adjusted to "pointer to function returning type", as 3423 // in 6.3.2.1. 3424 if (T->isFunctionType()) 3425 return getPointerType(T); 3426 3427 return T; 3428} 3429 3430QualType ASTContext::getSignatureParameterType(QualType T) { 3431 T = getVariableArrayDecayedType(T); 3432 T = getAdjustedParameterType(T); 3433 return T.getUnqualifiedType(); 3434} 3435 3436/// getArrayDecayedType - Return the properly qualified result of decaying the 3437/// specified array type to a pointer. This operation is non-trivial when 3438/// handling typedefs etc. The canonical type of "T" must be an array type, 3439/// this returns a pointer to a properly qualified element of the array. 3440/// 3441/// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 3442QualType ASTContext::getArrayDecayedType(QualType Ty) const { 3443 // Get the element type with 'getAsArrayType' so that we don't lose any 3444 // typedefs in the element type of the array. This also handles propagation 3445 // of type qualifiers from the array type into the element type if present 3446 // (C99 6.7.3p8). 3447 const ArrayType *PrettyArrayType = getAsArrayType(Ty); 3448 assert(PrettyArrayType && "Not an array type!"); 3449 3450 QualType PtrTy = getPointerType(PrettyArrayType->getElementType()); 3451 3452 // int x[restrict 4] -> int *restrict 3453 return getQualifiedType(PtrTy, PrettyArrayType->getIndexTypeQualifiers()); 3454} 3455 3456QualType ASTContext::getBaseElementType(const ArrayType *array) const { 3457 return getBaseElementType(array->getElementType()); 3458} 3459 3460QualType ASTContext::getBaseElementType(QualType type) const { 3461 Qualifiers qs; 3462 while (true) { 3463 SplitQualType split = type.getSplitDesugaredType(); 3464 const ArrayType *array = split.first->getAsArrayTypeUnsafe(); 3465 if (!array) break; 3466 3467 type = array->getElementType(); 3468 qs.addConsistentQualifiers(split.second); 3469 } 3470 3471 return getQualifiedType(type, qs); 3472} 3473 3474/// getConstantArrayElementCount - Returns number of constant array elements. 3475uint64_t 3476ASTContext::getConstantArrayElementCount(const ConstantArrayType *CA) const { 3477 uint64_t ElementCount = 1; 3478 do { 3479 ElementCount *= CA->getSize().getZExtValue(); 3480 CA = dyn_cast<ConstantArrayType>(CA->getElementType()); 3481 } while (CA); 3482 return ElementCount; 3483} 3484 3485/// getFloatingRank - Return a relative rank for floating point types. 3486/// This routine will assert if passed a built-in type that isn't a float. 3487static FloatingRank getFloatingRank(QualType T) { 3488 if (const ComplexType *CT = T->getAs<ComplexType>()) 3489 return getFloatingRank(CT->getElementType()); 3490 3491 assert(T->getAs<BuiltinType>() && "getFloatingRank(): not a floating type"); 3492 switch (T->getAs<BuiltinType>()->getKind()) { 3493 default: llvm_unreachable("getFloatingRank(): not a floating type"); 3494 case BuiltinType::Half: return HalfRank; 3495 case BuiltinType::Float: return FloatRank; 3496 case BuiltinType::Double: return DoubleRank; 3497 case BuiltinType::LongDouble: return LongDoubleRank; 3498 } 3499} 3500 3501/// getFloatingTypeOfSizeWithinDomain - Returns a real floating 3502/// point or a complex type (based on typeDomain/typeSize). 3503/// 'typeDomain' is a real floating point or complex type. 3504/// 'typeSize' is a real floating point or complex type. 3505QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size, 3506 QualType Domain) const { 3507 FloatingRank EltRank = getFloatingRank(Size); 3508 if (Domain->isComplexType()) { 3509 switch (EltRank) { 3510 default: llvm_unreachable("getFloatingRank(): illegal value for rank"); 3511 case FloatRank: return FloatComplexTy; 3512 case DoubleRank: return DoubleComplexTy; 3513 case LongDoubleRank: return LongDoubleComplexTy; 3514 } 3515 } 3516 3517 assert(Domain->isRealFloatingType() && "Unknown domain!"); 3518 switch (EltRank) { 3519 default: llvm_unreachable("getFloatingRank(): illegal value for rank"); 3520 case FloatRank: return FloatTy; 3521 case DoubleRank: return DoubleTy; 3522 case LongDoubleRank: return LongDoubleTy; 3523 } 3524} 3525 3526/// getFloatingTypeOrder - Compare the rank of the two specified floating 3527/// point types, ignoring the domain of the type (i.e. 'double' == 3528/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 3529/// LHS < RHS, return -1. 3530int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) const { 3531 FloatingRank LHSR = getFloatingRank(LHS); 3532 FloatingRank RHSR = getFloatingRank(RHS); 3533 3534 if (LHSR == RHSR) 3535 return 0; 3536 if (LHSR > RHSR) 3537 return 1; 3538 return -1; 3539} 3540 3541/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This 3542/// routine will assert if passed a built-in type that isn't an integer or enum, 3543/// or if it is not canonicalized. 3544unsigned ASTContext::getIntegerRank(const Type *T) const { 3545 assert(T->isCanonicalUnqualified() && "T should be canonicalized"); 3546 if (const EnumType* ET = dyn_cast<EnumType>(T)) 3547 T = ET->getDecl()->getPromotionType().getTypePtr(); 3548 3549 if (T->isSpecificBuiltinType(BuiltinType::WChar_S) || 3550 T->isSpecificBuiltinType(BuiltinType::WChar_U)) 3551 T = getFromTargetType(Target->getWCharType()).getTypePtr(); 3552 3553 if (T->isSpecificBuiltinType(BuiltinType::Char16)) 3554 T = getFromTargetType(Target->getChar16Type()).getTypePtr(); 3555 3556 if (T->isSpecificBuiltinType(BuiltinType::Char32)) 3557 T = getFromTargetType(Target->getChar32Type()).getTypePtr(); 3558 3559 switch (cast<BuiltinType>(T)->getKind()) { 3560 default: llvm_unreachable("getIntegerRank(): not a built-in integer"); 3561 case BuiltinType::Bool: 3562 return 1 + (getIntWidth(BoolTy) << 3); 3563 case BuiltinType::Char_S: 3564 case BuiltinType::Char_U: 3565 case BuiltinType::SChar: 3566 case BuiltinType::UChar: 3567 return 2 + (getIntWidth(CharTy) << 3); 3568 case BuiltinType::Short: 3569 case BuiltinType::UShort: 3570 return 3 + (getIntWidth(ShortTy) << 3); 3571 case BuiltinType::Int: 3572 case BuiltinType::UInt: 3573 return 4 + (getIntWidth(IntTy) << 3); 3574 case BuiltinType::Long: 3575 case BuiltinType::ULong: 3576 return 5 + (getIntWidth(LongTy) << 3); 3577 case BuiltinType::LongLong: 3578 case BuiltinType::ULongLong: 3579 return 6 + (getIntWidth(LongLongTy) << 3); 3580 case BuiltinType::Int128: 3581 case BuiltinType::UInt128: 3582 return 7 + (getIntWidth(Int128Ty) << 3); 3583 } 3584} 3585 3586/// \brief Whether this is a promotable bitfield reference according 3587/// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 3588/// 3589/// \returns the type this bit-field will promote to, or NULL if no 3590/// promotion occurs. 3591QualType ASTContext::isPromotableBitField(Expr *E) const { 3592 if (E->isTypeDependent() || E->isValueDependent()) 3593 return QualType(); 3594 3595 FieldDecl *Field = E->getBitField(); 3596 if (!Field) 3597 return QualType(); 3598 3599 QualType FT = Field->getType(); 3600 3601 uint64_t BitWidth = Field->getBitWidthValue(*this); 3602 uint64_t IntSize = getTypeSize(IntTy); 3603 // GCC extension compatibility: if the bit-field size is less than or equal 3604 // to the size of int, it gets promoted no matter what its type is. 3605 // For instance, unsigned long bf : 4 gets promoted to signed int. 3606 if (BitWidth < IntSize) 3607 return IntTy; 3608 3609 if (BitWidth == IntSize) 3610 return FT->isSignedIntegerType() ? IntTy : UnsignedIntTy; 3611 3612 // Types bigger than int are not subject to promotions, and therefore act 3613 // like the base type. 3614 // FIXME: This doesn't quite match what gcc does, but what gcc does here 3615 // is ridiculous. 3616 return QualType(); 3617} 3618 3619/// getPromotedIntegerType - Returns the type that Promotable will 3620/// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 3621/// integer type. 3622QualType ASTContext::getPromotedIntegerType(QualType Promotable) const { 3623 assert(!Promotable.isNull()); 3624 assert(Promotable->isPromotableIntegerType()); 3625 if (const EnumType *ET = Promotable->getAs<EnumType>()) 3626 return ET->getDecl()->getPromotionType(); 3627 if (Promotable->isSignedIntegerType()) 3628 return IntTy; 3629 uint64_t PromotableSize = getTypeSize(Promotable); 3630 uint64_t IntSize = getTypeSize(IntTy); 3631 assert(Promotable->isUnsignedIntegerType() && PromotableSize <= IntSize); 3632 return (PromotableSize != IntSize) ? IntTy : UnsignedIntTy; 3633} 3634 3635/// \brief Recurses in pointer/array types until it finds an objc retainable 3636/// type and returns its ownership. 3637Qualifiers::ObjCLifetime ASTContext::getInnerObjCOwnership(QualType T) const { 3638 while (!T.isNull()) { 3639 if (T.getObjCLifetime() != Qualifiers::OCL_None) 3640 return T.getObjCLifetime(); 3641 if (T->isArrayType()) 3642 T = getBaseElementType(T); 3643 else if (const PointerType *PT = T->getAs<PointerType>()) 3644 T = PT->getPointeeType(); 3645 else if (const ReferenceType *RT = T->getAs<ReferenceType>()) 3646 T = RT->getPointeeType(); 3647 else 3648 break; 3649 } 3650 3651 return Qualifiers::OCL_None; 3652} 3653 3654/// getIntegerTypeOrder - Returns the highest ranked integer type: 3655/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 3656/// LHS < RHS, return -1. 3657int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) const { 3658 const Type *LHSC = getCanonicalType(LHS).getTypePtr(); 3659 const Type *RHSC = getCanonicalType(RHS).getTypePtr(); 3660 if (LHSC == RHSC) return 0; 3661 3662 bool LHSUnsigned = LHSC->isUnsignedIntegerType(); 3663 bool RHSUnsigned = RHSC->isUnsignedIntegerType(); 3664 3665 unsigned LHSRank = getIntegerRank(LHSC); 3666 unsigned RHSRank = getIntegerRank(RHSC); 3667 3668 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned. 3669 if (LHSRank == RHSRank) return 0; 3670 return LHSRank > RHSRank ? 1 : -1; 3671 } 3672 3673 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa. 3674 if (LHSUnsigned) { 3675 // If the unsigned [LHS] type is larger, return it. 3676 if (LHSRank >= RHSRank) 3677 return 1; 3678 3679 // If the signed type can represent all values of the unsigned type, it 3680 // wins. Because we are dealing with 2's complement and types that are 3681 // powers of two larger than each other, this is always safe. 3682 return -1; 3683 } 3684 3685 // If the unsigned [RHS] type is larger, return it. 3686 if (RHSRank >= LHSRank) 3687 return -1; 3688 3689 // If the signed type can represent all values of the unsigned type, it 3690 // wins. Because we are dealing with 2's complement and types that are 3691 // powers of two larger than each other, this is always safe. 3692 return 1; 3693} 3694 3695static RecordDecl * 3696CreateRecordDecl(const ASTContext &Ctx, RecordDecl::TagKind TK, 3697 DeclContext *DC, IdentifierInfo *Id) { 3698 SourceLocation Loc; 3699 if (Ctx.getLangOptions().CPlusPlus) 3700 return CXXRecordDecl::Create(Ctx, TK, DC, Loc, Loc, Id); 3701 else 3702 return RecordDecl::Create(Ctx, TK, DC, Loc, Loc, Id); 3703} 3704 3705// getCFConstantStringType - Return the type used for constant CFStrings. 3706QualType ASTContext::getCFConstantStringType() const { 3707 if (!CFConstantStringTypeDecl) { 3708 CFConstantStringTypeDecl = 3709 CreateRecordDecl(*this, TTK_Struct, TUDecl, 3710 &Idents.get("NSConstantString")); 3711 CFConstantStringTypeDecl->startDefinition(); 3712 3713 QualType FieldTypes[4]; 3714 3715 // const int *isa; 3716 FieldTypes[0] = getPointerType(IntTy.withConst()); 3717 // int flags; 3718 FieldTypes[1] = IntTy; 3719 // const char *str; 3720 FieldTypes[2] = getPointerType(CharTy.withConst()); 3721 // long length; 3722 FieldTypes[3] = LongTy; 3723 3724 // Create fields 3725 for (unsigned i = 0; i < 4; ++i) { 3726 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl, 3727 SourceLocation(), 3728 SourceLocation(), 0, 3729 FieldTypes[i], /*TInfo=*/0, 3730 /*BitWidth=*/0, 3731 /*Mutable=*/false, 3732 /*HasInit=*/false); 3733 Field->setAccess(AS_public); 3734 CFConstantStringTypeDecl->addDecl(Field); 3735 } 3736 3737 CFConstantStringTypeDecl->completeDefinition(); 3738 } 3739 3740 return getTagDeclType(CFConstantStringTypeDecl); 3741} 3742 3743void ASTContext::setCFConstantStringType(QualType T) { 3744 const RecordType *Rec = T->getAs<RecordType>(); 3745 assert(Rec && "Invalid CFConstantStringType"); 3746 CFConstantStringTypeDecl = Rec->getDecl(); 3747} 3748 3749QualType ASTContext::getBlockDescriptorType() const { 3750 if (BlockDescriptorType) 3751 return getTagDeclType(BlockDescriptorType); 3752 3753 RecordDecl *T; 3754 // FIXME: Needs the FlagAppleBlock bit. 3755 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, 3756 &Idents.get("__block_descriptor")); 3757 T->startDefinition(); 3758 3759 QualType FieldTypes[] = { 3760 UnsignedLongTy, 3761 UnsignedLongTy, 3762 }; 3763 3764 const char *FieldNames[] = { 3765 "reserved", 3766 "Size" 3767 }; 3768 3769 for (size_t i = 0; i < 2; ++i) { 3770 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3771 SourceLocation(), 3772 &Idents.get(FieldNames[i]), 3773 FieldTypes[i], /*TInfo=*/0, 3774 /*BitWidth=*/0, 3775 /*Mutable=*/false, 3776 /*HasInit=*/false); 3777 Field->setAccess(AS_public); 3778 T->addDecl(Field); 3779 } 3780 3781 T->completeDefinition(); 3782 3783 BlockDescriptorType = T; 3784 3785 return getTagDeclType(BlockDescriptorType); 3786} 3787 3788QualType ASTContext::getBlockDescriptorExtendedType() const { 3789 if (BlockDescriptorExtendedType) 3790 return getTagDeclType(BlockDescriptorExtendedType); 3791 3792 RecordDecl *T; 3793 // FIXME: Needs the FlagAppleBlock bit. 3794 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, 3795 &Idents.get("__block_descriptor_withcopydispose")); 3796 T->startDefinition(); 3797 3798 QualType FieldTypes[] = { 3799 UnsignedLongTy, 3800 UnsignedLongTy, 3801 getPointerType(VoidPtrTy), 3802 getPointerType(VoidPtrTy) 3803 }; 3804 3805 const char *FieldNames[] = { 3806 "reserved", 3807 "Size", 3808 "CopyFuncPtr", 3809 "DestroyFuncPtr" 3810 }; 3811 3812 for (size_t i = 0; i < 4; ++i) { 3813 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3814 SourceLocation(), 3815 &Idents.get(FieldNames[i]), 3816 FieldTypes[i], /*TInfo=*/0, 3817 /*BitWidth=*/0, 3818 /*Mutable=*/false, 3819 /*HasInit=*/false); 3820 Field->setAccess(AS_public); 3821 T->addDecl(Field); 3822 } 3823 3824 T->completeDefinition(); 3825 3826 BlockDescriptorExtendedType = T; 3827 3828 return getTagDeclType(BlockDescriptorExtendedType); 3829} 3830 3831bool ASTContext::BlockRequiresCopying(QualType Ty) const { 3832 if (Ty->isObjCRetainableType()) 3833 return true; 3834 if (getLangOptions().CPlusPlus) { 3835 if (const RecordType *RT = Ty->getAs<RecordType>()) { 3836 CXXRecordDecl *RD = cast<CXXRecordDecl>(RT->getDecl()); 3837 return RD->hasConstCopyConstructor(); 3838 3839 } 3840 } 3841 return false; 3842} 3843 3844QualType 3845ASTContext::BuildByRefType(StringRef DeclName, QualType Ty) const { 3846 // type = struct __Block_byref_1_X { 3847 // void *__isa; 3848 // struct __Block_byref_1_X *__forwarding; 3849 // unsigned int __flags; 3850 // unsigned int __size; 3851 // void *__copy_helper; // as needed 3852 // void *__destroy_help // as needed 3853 // int X; 3854 // } * 3855 3856 bool HasCopyAndDispose = BlockRequiresCopying(Ty); 3857 3858 // FIXME: Move up 3859 llvm::SmallString<36> Name; 3860 llvm::raw_svector_ostream(Name) << "__Block_byref_" << 3861 ++UniqueBlockByRefTypeID << '_' << DeclName; 3862 RecordDecl *T; 3863 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, &Idents.get(Name.str())); 3864 T->startDefinition(); 3865 QualType Int32Ty = IntTy; 3866 assert(getIntWidth(IntTy) == 32 && "non-32bit int not supported"); 3867 QualType FieldTypes[] = { 3868 getPointerType(VoidPtrTy), 3869 getPointerType(getTagDeclType(T)), 3870 Int32Ty, 3871 Int32Ty, 3872 getPointerType(VoidPtrTy), 3873 getPointerType(VoidPtrTy), 3874 Ty 3875 }; 3876 3877 StringRef FieldNames[] = { 3878 "__isa", 3879 "__forwarding", 3880 "__flags", 3881 "__size", 3882 "__copy_helper", 3883 "__destroy_helper", 3884 DeclName, 3885 }; 3886 3887 for (size_t i = 0; i < 7; ++i) { 3888 if (!HasCopyAndDispose && i >=4 && i <= 5) 3889 continue; 3890 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3891 SourceLocation(), 3892 &Idents.get(FieldNames[i]), 3893 FieldTypes[i], /*TInfo=*/0, 3894 /*BitWidth=*/0, /*Mutable=*/false, 3895 /*HasInit=*/false); 3896 Field->setAccess(AS_public); 3897 T->addDecl(Field); 3898 } 3899 3900 T->completeDefinition(); 3901 3902 return getPointerType(getTagDeclType(T)); 3903} 3904 3905TypedefDecl *ASTContext::getObjCInstanceTypeDecl() { 3906 if (!ObjCInstanceTypeDecl) 3907 ObjCInstanceTypeDecl = TypedefDecl::Create(*this, 3908 getTranslationUnitDecl(), 3909 SourceLocation(), 3910 SourceLocation(), 3911 &Idents.get("instancetype"), 3912 getTrivialTypeSourceInfo(getObjCIdType())); 3913 return ObjCInstanceTypeDecl; 3914} 3915 3916// This returns true if a type has been typedefed to BOOL: 3917// typedef <type> BOOL; 3918static bool isTypeTypedefedAsBOOL(QualType T) { 3919 if (const TypedefType *TT = dyn_cast<TypedefType>(T)) 3920 if (IdentifierInfo *II = TT->getDecl()->getIdentifier()) 3921 return II->isStr("BOOL"); 3922 3923 return false; 3924} 3925 3926/// getObjCEncodingTypeSize returns size of type for objective-c encoding 3927/// purpose. 3928CharUnits ASTContext::getObjCEncodingTypeSize(QualType type) const { 3929 if (!type->isIncompleteArrayType() && type->isIncompleteType()) 3930 return CharUnits::Zero(); 3931 3932 CharUnits sz = getTypeSizeInChars(type); 3933 3934 // Make all integer and enum types at least as large as an int 3935 if (sz.isPositive() && type->isIntegralOrEnumerationType()) 3936 sz = std::max(sz, getTypeSizeInChars(IntTy)); 3937 // Treat arrays as pointers, since that's how they're passed in. 3938 else if (type->isArrayType()) 3939 sz = getTypeSizeInChars(VoidPtrTy); 3940 return sz; 3941} 3942 3943static inline 3944std::string charUnitsToString(const CharUnits &CU) { 3945 return llvm::itostr(CU.getQuantity()); 3946} 3947 3948/// getObjCEncodingForBlock - Return the encoded type for this block 3949/// declaration. 3950std::string ASTContext::getObjCEncodingForBlock(const BlockExpr *Expr) const { 3951 std::string S; 3952 3953 const BlockDecl *Decl = Expr->getBlockDecl(); 3954 QualType BlockTy = 3955 Expr->getType()->getAs<BlockPointerType>()->getPointeeType(); 3956 // Encode result type. 3957 getObjCEncodingForType(BlockTy->getAs<FunctionType>()->getResultType(), S); 3958 // Compute size of all parameters. 3959 // Start with computing size of a pointer in number of bytes. 3960 // FIXME: There might(should) be a better way of doing this computation! 3961 SourceLocation Loc; 3962 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3963 CharUnits ParmOffset = PtrSize; 3964 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), 3965 E = Decl->param_end(); PI != E; ++PI) { 3966 QualType PType = (*PI)->getType(); 3967 CharUnits sz = getObjCEncodingTypeSize(PType); 3968 assert (sz.isPositive() && "BlockExpr - Incomplete param type"); 3969 ParmOffset += sz; 3970 } 3971 // Size of the argument frame 3972 S += charUnitsToString(ParmOffset); 3973 // Block pointer and offset. 3974 S += "@?0"; 3975 3976 // Argument types. 3977 ParmOffset = PtrSize; 3978 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), E = 3979 Decl->param_end(); PI != E; ++PI) { 3980 ParmVarDecl *PVDecl = *PI; 3981 QualType PType = PVDecl->getOriginalType(); 3982 if (const ArrayType *AT = 3983 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3984 // Use array's original type only if it has known number of 3985 // elements. 3986 if (!isa<ConstantArrayType>(AT)) 3987 PType = PVDecl->getType(); 3988 } else if (PType->isFunctionType()) 3989 PType = PVDecl->getType(); 3990 getObjCEncodingForType(PType, S); 3991 S += charUnitsToString(ParmOffset); 3992 ParmOffset += getObjCEncodingTypeSize(PType); 3993 } 3994 3995 return S; 3996} 3997 3998bool ASTContext::getObjCEncodingForFunctionDecl(const FunctionDecl *Decl, 3999 std::string& S) { 4000 // Encode result type. 4001 getObjCEncodingForType(Decl->getResultType(), S); 4002 CharUnits ParmOffset; 4003 // Compute size of all parameters. 4004 for (FunctionDecl::param_const_iterator PI = Decl->param_begin(), 4005 E = Decl->param_end(); PI != E; ++PI) { 4006 QualType PType = (*PI)->getType(); 4007 CharUnits sz = getObjCEncodingTypeSize(PType); 4008 if (sz.isZero()) 4009 return true; 4010 4011 assert (sz.isPositive() && 4012 "getObjCEncodingForFunctionDecl - Incomplete param type"); 4013 ParmOffset += sz; 4014 } 4015 S += charUnitsToString(ParmOffset); 4016 ParmOffset = CharUnits::Zero(); 4017 4018 // Argument types. 4019 for (FunctionDecl::param_const_iterator PI = Decl->param_begin(), 4020 E = Decl->param_end(); PI != E; ++PI) { 4021 ParmVarDecl *PVDecl = *PI; 4022 QualType PType = PVDecl->getOriginalType(); 4023 if (const ArrayType *AT = 4024 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 4025 // Use array's original type only if it has known number of 4026 // elements. 4027 if (!isa<ConstantArrayType>(AT)) 4028 PType = PVDecl->getType(); 4029 } else if (PType->isFunctionType()) 4030 PType = PVDecl->getType(); 4031 getObjCEncodingForType(PType, S); 4032 S += charUnitsToString(ParmOffset); 4033 ParmOffset += getObjCEncodingTypeSize(PType); 4034 } 4035 4036 return false; 4037} 4038 4039/// getObjCEncodingForMethodDecl - Return the encoded type for this method 4040/// declaration. 4041bool ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, 4042 std::string& S) const { 4043 // FIXME: This is not very efficient. 4044 // Encode type qualifer, 'in', 'inout', etc. for the return type. 4045 getObjCEncodingForTypeQualifier(Decl->getObjCDeclQualifier(), S); 4046 // Encode result type. 4047 getObjCEncodingForType(Decl->getResultType(), S); 4048 // Compute size of all parameters. 4049 // Start with computing size of a pointer in number of bytes. 4050 // FIXME: There might(should) be a better way of doing this computation! 4051 SourceLocation Loc; 4052 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 4053 // The first two arguments (self and _cmd) are pointers; account for 4054 // their size. 4055 CharUnits ParmOffset = 2 * PtrSize; 4056 for (ObjCMethodDecl::param_const_iterator PI = Decl->param_begin(), 4057 E = Decl->sel_param_end(); PI != E; ++PI) { 4058 QualType PType = (*PI)->getType(); 4059 CharUnits sz = getObjCEncodingTypeSize(PType); 4060 if (sz.isZero()) 4061 return true; 4062 4063 assert (sz.isPositive() && 4064 "getObjCEncodingForMethodDecl - Incomplete param type"); 4065 ParmOffset += sz; 4066 } 4067 S += charUnitsToString(ParmOffset); 4068 S += "@0:"; 4069 S += charUnitsToString(PtrSize); 4070 4071 // Argument types. 4072 ParmOffset = 2 * PtrSize; 4073 for (ObjCMethodDecl::param_const_iterator PI = Decl->param_begin(), 4074 E = Decl->sel_param_end(); PI != E; ++PI) { 4075 const ParmVarDecl *PVDecl = *PI; 4076 QualType PType = PVDecl->getOriginalType(); 4077 if (const ArrayType *AT = 4078 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 4079 // Use array's original type only if it has known number of 4080 // elements. 4081 if (!isa<ConstantArrayType>(AT)) 4082 PType = PVDecl->getType(); 4083 } else if (PType->isFunctionType()) 4084 PType = PVDecl->getType(); 4085 // Process argument qualifiers for user supplied arguments; such as, 4086 // 'in', 'inout', etc. 4087 getObjCEncodingForTypeQualifier(PVDecl->getObjCDeclQualifier(), S); 4088 getObjCEncodingForType(PType, S); 4089 S += charUnitsToString(ParmOffset); 4090 ParmOffset += getObjCEncodingTypeSize(PType); 4091 } 4092 4093 return false; 4094} 4095 4096/// getObjCEncodingForPropertyDecl - Return the encoded type for this 4097/// property declaration. If non-NULL, Container must be either an 4098/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be 4099/// NULL when getting encodings for protocol properties. 4100/// Property attributes are stored as a comma-delimited C string. The simple 4101/// attributes readonly and bycopy are encoded as single characters. The 4102/// parametrized attributes, getter=name, setter=name, and ivar=name, are 4103/// encoded as single characters, followed by an identifier. Property types 4104/// are also encoded as a parametrized attribute. The characters used to encode 4105/// these attributes are defined by the following enumeration: 4106/// @code 4107/// enum PropertyAttributes { 4108/// kPropertyReadOnly = 'R', // property is read-only. 4109/// kPropertyBycopy = 'C', // property is a copy of the value last assigned 4110/// kPropertyByref = '&', // property is a reference to the value last assigned 4111/// kPropertyDynamic = 'D', // property is dynamic 4112/// kPropertyGetter = 'G', // followed by getter selector name 4113/// kPropertySetter = 'S', // followed by setter selector name 4114/// kPropertyInstanceVariable = 'V' // followed by instance variable name 4115/// kPropertyType = 't' // followed by old-style type encoding. 4116/// kPropertyWeak = 'W' // 'weak' property 4117/// kPropertyStrong = 'P' // property GC'able 4118/// kPropertyNonAtomic = 'N' // property non-atomic 4119/// }; 4120/// @endcode 4121void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 4122 const Decl *Container, 4123 std::string& S) const { 4124 // Collect information from the property implementation decl(s). 4125 bool Dynamic = false; 4126 ObjCPropertyImplDecl *SynthesizePID = 0; 4127 4128 // FIXME: Duplicated code due to poor abstraction. 4129 if (Container) { 4130 if (const ObjCCategoryImplDecl *CID = 4131 dyn_cast<ObjCCategoryImplDecl>(Container)) { 4132 for (ObjCCategoryImplDecl::propimpl_iterator 4133 i = CID->propimpl_begin(), e = CID->propimpl_end(); 4134 i != e; ++i) { 4135 ObjCPropertyImplDecl *PID = *i; 4136 if (PID->getPropertyDecl() == PD) { 4137 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 4138 Dynamic = true; 4139 } else { 4140 SynthesizePID = PID; 4141 } 4142 } 4143 } 4144 } else { 4145 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container); 4146 for (ObjCCategoryImplDecl::propimpl_iterator 4147 i = OID->propimpl_begin(), e = OID->propimpl_end(); 4148 i != e; ++i) { 4149 ObjCPropertyImplDecl *PID = *i; 4150 if (PID->getPropertyDecl() == PD) { 4151 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 4152 Dynamic = true; 4153 } else { 4154 SynthesizePID = PID; 4155 } 4156 } 4157 } 4158 } 4159 } 4160 4161 // FIXME: This is not very efficient. 4162 S = "T"; 4163 4164 // Encode result type. 4165 // GCC has some special rules regarding encoding of properties which 4166 // closely resembles encoding of ivars. 4167 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, 0, 4168 true /* outermost type */, 4169 true /* encoding for property */); 4170 4171 if (PD->isReadOnly()) { 4172 S += ",R"; 4173 } else { 4174 switch (PD->getSetterKind()) { 4175 case ObjCPropertyDecl::Assign: break; 4176 case ObjCPropertyDecl::Copy: S += ",C"; break; 4177 case ObjCPropertyDecl::Retain: S += ",&"; break; 4178 case ObjCPropertyDecl::Weak: S += ",W"; break; 4179 } 4180 } 4181 4182 // It really isn't clear at all what this means, since properties 4183 // are "dynamic by default". 4184 if (Dynamic) 4185 S += ",D"; 4186 4187 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) 4188 S += ",N"; 4189 4190 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) { 4191 S += ",G"; 4192 S += PD->getGetterName().getAsString(); 4193 } 4194 4195 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) { 4196 S += ",S"; 4197 S += PD->getSetterName().getAsString(); 4198 } 4199 4200 if (SynthesizePID) { 4201 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl(); 4202 S += ",V"; 4203 S += OID->getNameAsString(); 4204 } 4205 4206 // FIXME: OBJCGC: weak & strong 4207} 4208 4209/// getLegacyIntegralTypeEncoding - 4210/// Another legacy compatibility encoding: 32-bit longs are encoded as 4211/// 'l' or 'L' , but not always. For typedefs, we need to use 4212/// 'i' or 'I' instead if encoding a struct field, or a pointer! 4213/// 4214void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const { 4215 if (isa<TypedefType>(PointeeTy.getTypePtr())) { 4216 if (const BuiltinType *BT = PointeeTy->getAs<BuiltinType>()) { 4217 if (BT->getKind() == BuiltinType::ULong && getIntWidth(PointeeTy) == 32) 4218 PointeeTy = UnsignedIntTy; 4219 else 4220 if (BT->getKind() == BuiltinType::Long && getIntWidth(PointeeTy) == 32) 4221 PointeeTy = IntTy; 4222 } 4223 } 4224} 4225 4226void ASTContext::getObjCEncodingForType(QualType T, std::string& S, 4227 const FieldDecl *Field) const { 4228 // We follow the behavior of gcc, expanding structures which are 4229 // directly pointed to, and expanding embedded structures. Note that 4230 // these rules are sufficient to prevent recursive encoding of the 4231 // same type. 4232 getObjCEncodingForTypeImpl(T, S, true, true, Field, 4233 true /* outermost type */); 4234} 4235 4236static char ObjCEncodingForPrimitiveKind(const ASTContext *C, QualType T) { 4237 switch (T->getAs<BuiltinType>()->getKind()) { 4238 default: llvm_unreachable("Unhandled builtin type kind"); 4239 case BuiltinType::Void: return 'v'; 4240 case BuiltinType::Bool: return 'B'; 4241 case BuiltinType::Char_U: 4242 case BuiltinType::UChar: return 'C'; 4243 case BuiltinType::UShort: return 'S'; 4244 case BuiltinType::UInt: return 'I'; 4245 case BuiltinType::ULong: 4246 return C->getIntWidth(T) == 32 ? 'L' : 'Q'; 4247 case BuiltinType::UInt128: return 'T'; 4248 case BuiltinType::ULongLong: return 'Q'; 4249 case BuiltinType::Char_S: 4250 case BuiltinType::SChar: return 'c'; 4251 case BuiltinType::Short: return 's'; 4252 case BuiltinType::WChar_S: 4253 case BuiltinType::WChar_U: 4254 case BuiltinType::Int: return 'i'; 4255 case BuiltinType::Long: 4256 return C->getIntWidth(T) == 32 ? 'l' : 'q'; 4257 case BuiltinType::LongLong: return 'q'; 4258 case BuiltinType::Int128: return 't'; 4259 case BuiltinType::Float: return 'f'; 4260 case BuiltinType::Double: return 'd'; 4261 case BuiltinType::LongDouble: return 'D'; 4262 } 4263} 4264 4265static char ObjCEncodingForEnumType(const ASTContext *C, const EnumType *ET) { 4266 EnumDecl *Enum = ET->getDecl(); 4267 4268 // The encoding of an non-fixed enum type is always 'i', regardless of size. 4269 if (!Enum->isFixed()) 4270 return 'i'; 4271 4272 // The encoding of a fixed enum type matches its fixed underlying type. 4273 return ObjCEncodingForPrimitiveKind(C, Enum->getIntegerType()); 4274} 4275 4276static void EncodeBitField(const ASTContext *Ctx, std::string& S, 4277 QualType T, const FieldDecl *FD) { 4278 assert(FD->isBitField() && "not a bitfield - getObjCEncodingForTypeImpl"); 4279 S += 'b'; 4280 // The NeXT runtime encodes bit fields as b followed by the number of bits. 4281 // The GNU runtime requires more information; bitfields are encoded as b, 4282 // then the offset (in bits) of the first element, then the type of the 4283 // bitfield, then the size in bits. For example, in this structure: 4284 // 4285 // struct 4286 // { 4287 // int integer; 4288 // int flags:2; 4289 // }; 4290 // On a 32-bit system, the encoding for flags would be b2 for the NeXT 4291 // runtime, but b32i2 for the GNU runtime. The reason for this extra 4292 // information is not especially sensible, but we're stuck with it for 4293 // compatibility with GCC, although providing it breaks anything that 4294 // actually uses runtime introspection and wants to work on both runtimes... 4295 if (!Ctx->getLangOptions().NeXTRuntime) { 4296 const RecordDecl *RD = FD->getParent(); 4297 const ASTRecordLayout &RL = Ctx->getASTRecordLayout(RD); 4298 S += llvm::utostr(RL.getFieldOffset(FD->getFieldIndex())); 4299 if (const EnumType *ET = T->getAs<EnumType>()) 4300 S += ObjCEncodingForEnumType(Ctx, ET); 4301 else 4302 S += ObjCEncodingForPrimitiveKind(Ctx, T); 4303 } 4304 S += llvm::utostr(FD->getBitWidthValue(*Ctx)); 4305} 4306 4307// FIXME: Use SmallString for accumulating string. 4308void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S, 4309 bool ExpandPointedToStructures, 4310 bool ExpandStructures, 4311 const FieldDecl *FD, 4312 bool OutermostType, 4313 bool EncodingProperty, 4314 bool StructField) const { 4315 if (T->getAs<BuiltinType>()) { 4316 if (FD && FD->isBitField()) 4317 return EncodeBitField(this, S, T, FD); 4318 S += ObjCEncodingForPrimitiveKind(this, T); 4319 return; 4320 } 4321 4322 if (const ComplexType *CT = T->getAs<ComplexType>()) { 4323 S += 'j'; 4324 getObjCEncodingForTypeImpl(CT->getElementType(), S, false, false, 0, false, 4325 false); 4326 return; 4327 } 4328 4329 // encoding for pointer or r3eference types. 4330 QualType PointeeTy; 4331 if (const PointerType *PT = T->getAs<PointerType>()) { 4332 if (PT->isObjCSelType()) { 4333 S += ':'; 4334 return; 4335 } 4336 PointeeTy = PT->getPointeeType(); 4337 } 4338 else if (const ReferenceType *RT = T->getAs<ReferenceType>()) 4339 PointeeTy = RT->getPointeeType(); 4340 if (!PointeeTy.isNull()) { 4341 bool isReadOnly = false; 4342 // For historical/compatibility reasons, the read-only qualifier of the 4343 // pointee gets emitted _before_ the '^'. The read-only qualifier of 4344 // the pointer itself gets ignored, _unless_ we are looking at a typedef! 4345 // Also, do not emit the 'r' for anything but the outermost type! 4346 if (isa<TypedefType>(T.getTypePtr())) { 4347 if (OutermostType && T.isConstQualified()) { 4348 isReadOnly = true; 4349 S += 'r'; 4350 } 4351 } else if (OutermostType) { 4352 QualType P = PointeeTy; 4353 while (P->getAs<PointerType>()) 4354 P = P->getAs<PointerType>()->getPointeeType(); 4355 if (P.isConstQualified()) { 4356 isReadOnly = true; 4357 S += 'r'; 4358 } 4359 } 4360 if (isReadOnly) { 4361 // Another legacy compatibility encoding. Some ObjC qualifier and type 4362 // combinations need to be rearranged. 4363 // Rewrite "in const" from "nr" to "rn" 4364 if (StringRef(S).endswith("nr")) 4365 S.replace(S.end()-2, S.end(), "rn"); 4366 } 4367 4368 if (PointeeTy->isCharType()) { 4369 // char pointer types should be encoded as '*' unless it is a 4370 // type that has been typedef'd to 'BOOL'. 4371 if (!isTypeTypedefedAsBOOL(PointeeTy)) { 4372 S += '*'; 4373 return; 4374 } 4375 } else if (const RecordType *RTy = PointeeTy->getAs<RecordType>()) { 4376 // GCC binary compat: Need to convert "struct objc_class *" to "#". 4377 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_class")) { 4378 S += '#'; 4379 return; 4380 } 4381 // GCC binary compat: Need to convert "struct objc_object *" to "@". 4382 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_object")) { 4383 S += '@'; 4384 return; 4385 } 4386 // fall through... 4387 } 4388 S += '^'; 4389 getLegacyIntegralTypeEncoding(PointeeTy); 4390 4391 getObjCEncodingForTypeImpl(PointeeTy, S, false, ExpandPointedToStructures, 4392 NULL); 4393 return; 4394 } 4395 4396 if (const ArrayType *AT = 4397 // Ignore type qualifiers etc. 4398 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) { 4399 if (isa<IncompleteArrayType>(AT) && !StructField) { 4400 // Incomplete arrays are encoded as a pointer to the array element. 4401 S += '^'; 4402 4403 getObjCEncodingForTypeImpl(AT->getElementType(), S, 4404 false, ExpandStructures, FD); 4405 } else { 4406 S += '['; 4407 4408 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) { 4409 if (getTypeSize(CAT->getElementType()) == 0) 4410 S += '0'; 4411 else 4412 S += llvm::utostr(CAT->getSize().getZExtValue()); 4413 } else { 4414 //Variable length arrays are encoded as a regular array with 0 elements. 4415 assert((isa<VariableArrayType>(AT) || isa<IncompleteArrayType>(AT)) && 4416 "Unknown array type!"); 4417 S += '0'; 4418 } 4419 4420 getObjCEncodingForTypeImpl(AT->getElementType(), S, 4421 false, ExpandStructures, FD); 4422 S += ']'; 4423 } 4424 return; 4425 } 4426 4427 if (T->getAs<FunctionType>()) { 4428 S += '?'; 4429 return; 4430 } 4431 4432 if (const RecordType *RTy = T->getAs<RecordType>()) { 4433 RecordDecl *RDecl = RTy->getDecl(); 4434 S += RDecl->isUnion() ? '(' : '{'; 4435 // Anonymous structures print as '?' 4436 if (const IdentifierInfo *II = RDecl->getIdentifier()) { 4437 S += II->getName(); 4438 if (ClassTemplateSpecializationDecl *Spec 4439 = dyn_cast<ClassTemplateSpecializationDecl>(RDecl)) { 4440 const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs(); 4441 std::string TemplateArgsStr 4442 = TemplateSpecializationType::PrintTemplateArgumentList( 4443 TemplateArgs.data(), 4444 TemplateArgs.size(), 4445 (*this).getPrintingPolicy()); 4446 4447 S += TemplateArgsStr; 4448 } 4449 } else { 4450 S += '?'; 4451 } 4452 if (ExpandStructures) { 4453 S += '='; 4454 if (!RDecl->isUnion()) { 4455 getObjCEncodingForStructureImpl(RDecl, S, FD); 4456 } else { 4457 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 4458 FieldEnd = RDecl->field_end(); 4459 Field != FieldEnd; ++Field) { 4460 if (FD) { 4461 S += '"'; 4462 S += Field->getNameAsString(); 4463 S += '"'; 4464 } 4465 4466 // Special case bit-fields. 4467 if (Field->isBitField()) { 4468 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, 4469 (*Field)); 4470 } else { 4471 QualType qt = Field->getType(); 4472 getLegacyIntegralTypeEncoding(qt); 4473 getObjCEncodingForTypeImpl(qt, S, false, true, 4474 FD, /*OutermostType*/false, 4475 /*EncodingProperty*/false, 4476 /*StructField*/true); 4477 } 4478 } 4479 } 4480 } 4481 S += RDecl->isUnion() ? ')' : '}'; 4482 return; 4483 } 4484 4485 if (const EnumType *ET = T->getAs<EnumType>()) { 4486 if (FD && FD->isBitField()) 4487 EncodeBitField(this, S, T, FD); 4488 else 4489 S += ObjCEncodingForEnumType(this, ET); 4490 return; 4491 } 4492 4493 if (T->isBlockPointerType()) { 4494 S += "@?"; // Unlike a pointer-to-function, which is "^?". 4495 return; 4496 } 4497 4498 // Ignore protocol qualifiers when mangling at this level. 4499 if (const ObjCObjectType *OT = T->getAs<ObjCObjectType>()) 4500 T = OT->getBaseType(); 4501 4502 if (const ObjCInterfaceType *OIT = T->getAs<ObjCInterfaceType>()) { 4503 // @encode(class_name) 4504 ObjCInterfaceDecl *OI = OIT->getDecl(); 4505 S += '{'; 4506 const IdentifierInfo *II = OI->getIdentifier(); 4507 S += II->getName(); 4508 S += '='; 4509 SmallVector<const ObjCIvarDecl*, 32> Ivars; 4510 DeepCollectObjCIvars(OI, true, Ivars); 4511 for (unsigned i = 0, e = Ivars.size(); i != e; ++i) { 4512 const FieldDecl *Field = cast<FieldDecl>(Ivars[i]); 4513 if (Field->isBitField()) 4514 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, Field); 4515 else 4516 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, FD); 4517 } 4518 S += '}'; 4519 return; 4520 } 4521 4522 if (const ObjCObjectPointerType *OPT = T->getAs<ObjCObjectPointerType>()) { 4523 if (OPT->isObjCIdType()) { 4524 S += '@'; 4525 return; 4526 } 4527 4528 if (OPT->isObjCClassType() || OPT->isObjCQualifiedClassType()) { 4529 // FIXME: Consider if we need to output qualifiers for 'Class<p>'. 4530 // Since this is a binary compatibility issue, need to consult with runtime 4531 // folks. Fortunately, this is a *very* obsure construct. 4532 S += '#'; 4533 return; 4534 } 4535 4536 if (OPT->isObjCQualifiedIdType()) { 4537 getObjCEncodingForTypeImpl(getObjCIdType(), S, 4538 ExpandPointedToStructures, 4539 ExpandStructures, FD); 4540 if (FD || EncodingProperty) { 4541 // Note that we do extended encoding of protocol qualifer list 4542 // Only when doing ivar or property encoding. 4543 S += '"'; 4544 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 4545 E = OPT->qual_end(); I != E; ++I) { 4546 S += '<'; 4547 S += (*I)->getNameAsString(); 4548 S += '>'; 4549 } 4550 S += '"'; 4551 } 4552 return; 4553 } 4554 4555 QualType PointeeTy = OPT->getPointeeType(); 4556 if (!EncodingProperty && 4557 isa<TypedefType>(PointeeTy.getTypePtr())) { 4558 // Another historical/compatibility reason. 4559 // We encode the underlying type which comes out as 4560 // {...}; 4561 S += '^'; 4562 getObjCEncodingForTypeImpl(PointeeTy, S, 4563 false, ExpandPointedToStructures, 4564 NULL); 4565 return; 4566 } 4567 4568 S += '@'; 4569 if (OPT->getInterfaceDecl() && (FD || EncodingProperty)) { 4570 S += '"'; 4571 S += OPT->getInterfaceDecl()->getIdentifier()->getName(); 4572 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 4573 E = OPT->qual_end(); I != E; ++I) { 4574 S += '<'; 4575 S += (*I)->getNameAsString(); 4576 S += '>'; 4577 } 4578 S += '"'; 4579 } 4580 return; 4581 } 4582 4583 // gcc just blithely ignores member pointers. 4584 // TODO: maybe there should be a mangling for these 4585 if (T->getAs<MemberPointerType>()) 4586 return; 4587 4588 if (T->isVectorType()) { 4589 // This matches gcc's encoding, even though technically it is 4590 // insufficient. 4591 // FIXME. We should do a better job than gcc. 4592 return; 4593 } 4594 4595 llvm_unreachable("@encode for type not implemented!"); 4596} 4597 4598void ASTContext::getObjCEncodingForStructureImpl(RecordDecl *RDecl, 4599 std::string &S, 4600 const FieldDecl *FD, 4601 bool includeVBases) const { 4602 assert(RDecl && "Expected non-null RecordDecl"); 4603 assert(!RDecl->isUnion() && "Should not be called for unions"); 4604 if (!RDecl->getDefinition()) 4605 return; 4606 4607 CXXRecordDecl *CXXRec = dyn_cast<CXXRecordDecl>(RDecl); 4608 std::multimap<uint64_t, NamedDecl *> FieldOrBaseOffsets; 4609 const ASTRecordLayout &layout = getASTRecordLayout(RDecl); 4610 4611 if (CXXRec) { 4612 for (CXXRecordDecl::base_class_iterator 4613 BI = CXXRec->bases_begin(), 4614 BE = CXXRec->bases_end(); BI != BE; ++BI) { 4615 if (!BI->isVirtual()) { 4616 CXXRecordDecl *base = BI->getType()->getAsCXXRecordDecl(); 4617 if (base->isEmpty()) 4618 continue; 4619 uint64_t offs = layout.getBaseClassOffsetInBits(base); 4620 FieldOrBaseOffsets.insert(FieldOrBaseOffsets.upper_bound(offs), 4621 std::make_pair(offs, base)); 4622 } 4623 } 4624 } 4625 4626 unsigned i = 0; 4627 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 4628 FieldEnd = RDecl->field_end(); 4629 Field != FieldEnd; ++Field, ++i) { 4630 uint64_t offs = layout.getFieldOffset(i); 4631 FieldOrBaseOffsets.insert(FieldOrBaseOffsets.upper_bound(offs), 4632 std::make_pair(offs, *Field)); 4633 } 4634 4635 if (CXXRec && includeVBases) { 4636 for (CXXRecordDecl::base_class_iterator 4637 BI = CXXRec->vbases_begin(), 4638 BE = CXXRec->vbases_end(); BI != BE; ++BI) { 4639 CXXRecordDecl *base = BI->getType()->getAsCXXRecordDecl(); 4640 if (base->isEmpty()) 4641 continue; 4642 uint64_t offs = layout.getVBaseClassOffsetInBits(base); 4643 if (FieldOrBaseOffsets.find(offs) == FieldOrBaseOffsets.end()) 4644 FieldOrBaseOffsets.insert(FieldOrBaseOffsets.end(), 4645 std::make_pair(offs, base)); 4646 } 4647 } 4648 4649 CharUnits size; 4650 if (CXXRec) { 4651 size = includeVBases ? layout.getSize() : layout.getNonVirtualSize(); 4652 } else { 4653 size = layout.getSize(); 4654 } 4655 4656 uint64_t CurOffs = 0; 4657 std::multimap<uint64_t, NamedDecl *>::iterator 4658 CurLayObj = FieldOrBaseOffsets.begin(); 4659 4660 if ((CurLayObj != FieldOrBaseOffsets.end() && CurLayObj->first != 0) || 4661 (CurLayObj == FieldOrBaseOffsets.end() && 4662 CXXRec && CXXRec->isDynamicClass())) { 4663 assert(CXXRec && CXXRec->isDynamicClass() && 4664 "Offset 0 was empty but no VTable ?"); 4665 if (FD) { 4666 S += "\"_vptr$"; 4667 std::string recname = CXXRec->getNameAsString(); 4668 if (recname.empty()) recname = "?"; 4669 S += recname; 4670 S += '"'; 4671 } 4672 S += "^^?"; 4673 CurOffs += getTypeSize(VoidPtrTy); 4674 } 4675 4676 if (!RDecl->hasFlexibleArrayMember()) { 4677 // Mark the end of the structure. 4678 uint64_t offs = toBits(size); 4679 FieldOrBaseOffsets.insert(FieldOrBaseOffsets.upper_bound(offs), 4680 std::make_pair(offs, (NamedDecl*)0)); 4681 } 4682 4683 for (; CurLayObj != FieldOrBaseOffsets.end(); ++CurLayObj) { 4684 assert(CurOffs <= CurLayObj->first); 4685 4686 if (CurOffs < CurLayObj->first) { 4687 uint64_t padding = CurLayObj->first - CurOffs; 4688 // FIXME: There doesn't seem to be a way to indicate in the encoding that 4689 // packing/alignment of members is different that normal, in which case 4690 // the encoding will be out-of-sync with the real layout. 4691 // If the runtime switches to just consider the size of types without 4692 // taking into account alignment, we could make padding explicit in the 4693 // encoding (e.g. using arrays of chars). The encoding strings would be 4694 // longer then though. 4695 CurOffs += padding; 4696 } 4697 4698 NamedDecl *dcl = CurLayObj->second; 4699 if (dcl == 0) 4700 break; // reached end of structure. 4701 4702 if (CXXRecordDecl *base = dyn_cast<CXXRecordDecl>(dcl)) { 4703 // We expand the bases without their virtual bases since those are going 4704 // in the initial structure. Note that this differs from gcc which 4705 // expands virtual bases each time one is encountered in the hierarchy, 4706 // making the encoding type bigger than it really is. 4707 getObjCEncodingForStructureImpl(base, S, FD, /*includeVBases*/false); 4708 assert(!base->isEmpty()); 4709 CurOffs += toBits(getASTRecordLayout(base).getNonVirtualSize()); 4710 } else { 4711 FieldDecl *field = cast<FieldDecl>(dcl); 4712 if (FD) { 4713 S += '"'; 4714 S += field->getNameAsString(); 4715 S += '"'; 4716 } 4717 4718 if (field->isBitField()) { 4719 EncodeBitField(this, S, field->getType(), field); 4720 CurOffs += field->getBitWidthValue(*this); 4721 } else { 4722 QualType qt = field->getType(); 4723 getLegacyIntegralTypeEncoding(qt); 4724 getObjCEncodingForTypeImpl(qt, S, false, true, FD, 4725 /*OutermostType*/false, 4726 /*EncodingProperty*/false, 4727 /*StructField*/true); 4728 CurOffs += getTypeSize(field->getType()); 4729 } 4730 } 4731 } 4732} 4733 4734void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 4735 std::string& S) const { 4736 if (QT & Decl::OBJC_TQ_In) 4737 S += 'n'; 4738 if (QT & Decl::OBJC_TQ_Inout) 4739 S += 'N'; 4740 if (QT & Decl::OBJC_TQ_Out) 4741 S += 'o'; 4742 if (QT & Decl::OBJC_TQ_Bycopy) 4743 S += 'O'; 4744 if (QT & Decl::OBJC_TQ_Byref) 4745 S += 'R'; 4746 if (QT & Decl::OBJC_TQ_Oneway) 4747 S += 'V'; 4748} 4749 4750void ASTContext::setBuiltinVaListType(QualType T) { 4751 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!"); 4752 4753 BuiltinVaListType = T; 4754} 4755 4756TypedefDecl *ASTContext::getObjCIdDecl() const { 4757 if (!ObjCIdDecl) { 4758 QualType T = getObjCObjectType(ObjCBuiltinIdTy, 0, 0); 4759 T = getObjCObjectPointerType(T); 4760 TypeSourceInfo *IdInfo = getTrivialTypeSourceInfo(T); 4761 ObjCIdDecl = TypedefDecl::Create(const_cast<ASTContext &>(*this), 4762 getTranslationUnitDecl(), 4763 SourceLocation(), SourceLocation(), 4764 &Idents.get("id"), IdInfo); 4765 } 4766 4767 return ObjCIdDecl; 4768} 4769 4770TypedefDecl *ASTContext::getObjCSelDecl() const { 4771 if (!ObjCSelDecl) { 4772 QualType SelT = getPointerType(ObjCBuiltinSelTy); 4773 TypeSourceInfo *SelInfo = getTrivialTypeSourceInfo(SelT); 4774 ObjCSelDecl = TypedefDecl::Create(const_cast<ASTContext &>(*this), 4775 getTranslationUnitDecl(), 4776 SourceLocation(), SourceLocation(), 4777 &Idents.get("SEL"), SelInfo); 4778 } 4779 return ObjCSelDecl; 4780} 4781 4782void ASTContext::setObjCProtoType(QualType QT) { 4783 ObjCProtoType = QT; 4784} 4785 4786TypedefDecl *ASTContext::getObjCClassDecl() const { 4787 if (!ObjCClassDecl) { 4788 QualType T = getObjCObjectType(ObjCBuiltinClassTy, 0, 0); 4789 T = getObjCObjectPointerType(T); 4790 TypeSourceInfo *ClassInfo = getTrivialTypeSourceInfo(T); 4791 ObjCClassDecl = TypedefDecl::Create(const_cast<ASTContext &>(*this), 4792 getTranslationUnitDecl(), 4793 SourceLocation(), SourceLocation(), 4794 &Idents.get("Class"), ClassInfo); 4795 } 4796 4797 return ObjCClassDecl; 4798} 4799 4800void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) { 4801 assert(ObjCConstantStringType.isNull() && 4802 "'NSConstantString' type already set!"); 4803 4804 ObjCConstantStringType = getObjCInterfaceType(Decl); 4805} 4806 4807/// \brief Retrieve the template name that corresponds to a non-empty 4808/// lookup. 4809TemplateName 4810ASTContext::getOverloadedTemplateName(UnresolvedSetIterator Begin, 4811 UnresolvedSetIterator End) const { 4812 unsigned size = End - Begin; 4813 assert(size > 1 && "set is not overloaded!"); 4814 4815 void *memory = Allocate(sizeof(OverloadedTemplateStorage) + 4816 size * sizeof(FunctionTemplateDecl*)); 4817 OverloadedTemplateStorage *OT = new(memory) OverloadedTemplateStorage(size); 4818 4819 NamedDecl **Storage = OT->getStorage(); 4820 for (UnresolvedSetIterator I = Begin; I != End; ++I) { 4821 NamedDecl *D = *I; 4822 assert(isa<FunctionTemplateDecl>(D) || 4823 (isa<UsingShadowDecl>(D) && 4824 isa<FunctionTemplateDecl>(D->getUnderlyingDecl()))); 4825 *Storage++ = D; 4826 } 4827 4828 return TemplateName(OT); 4829} 4830 4831/// \brief Retrieve the template name that represents a qualified 4832/// template name such as \c std::vector. 4833TemplateName 4834ASTContext::getQualifiedTemplateName(NestedNameSpecifier *NNS, 4835 bool TemplateKeyword, 4836 TemplateDecl *Template) const { 4837 assert(NNS && "Missing nested-name-specifier in qualified template name"); 4838 4839 // FIXME: Canonicalization? 4840 llvm::FoldingSetNodeID ID; 4841 QualifiedTemplateName::Profile(ID, NNS, TemplateKeyword, Template); 4842 4843 void *InsertPos = 0; 4844 QualifiedTemplateName *QTN = 4845 QualifiedTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4846 if (!QTN) { 4847 QTN = new (*this,4) QualifiedTemplateName(NNS, TemplateKeyword, Template); 4848 QualifiedTemplateNames.InsertNode(QTN, InsertPos); 4849 } 4850 4851 return TemplateName(QTN); 4852} 4853 4854/// \brief Retrieve the template name that represents a dependent 4855/// template name such as \c MetaFun::template apply. 4856TemplateName 4857ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 4858 const IdentifierInfo *Name) const { 4859 assert((!NNS || NNS->isDependent()) && 4860 "Nested name specifier must be dependent"); 4861 4862 llvm::FoldingSetNodeID ID; 4863 DependentTemplateName::Profile(ID, NNS, Name); 4864 4865 void *InsertPos = 0; 4866 DependentTemplateName *QTN = 4867 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4868 4869 if (QTN) 4870 return TemplateName(QTN); 4871 4872 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 4873 if (CanonNNS == NNS) { 4874 QTN = new (*this,4) DependentTemplateName(NNS, Name); 4875 } else { 4876 TemplateName Canon = getDependentTemplateName(CanonNNS, Name); 4877 QTN = new (*this,4) DependentTemplateName(NNS, Name, Canon); 4878 DependentTemplateName *CheckQTN = 4879 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4880 assert(!CheckQTN && "Dependent type name canonicalization broken"); 4881 (void)CheckQTN; 4882 } 4883 4884 DependentTemplateNames.InsertNode(QTN, InsertPos); 4885 return TemplateName(QTN); 4886} 4887 4888/// \brief Retrieve the template name that represents a dependent 4889/// template name such as \c MetaFun::template operator+. 4890TemplateName 4891ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 4892 OverloadedOperatorKind Operator) const { 4893 assert((!NNS || NNS->isDependent()) && 4894 "Nested name specifier must be dependent"); 4895 4896 llvm::FoldingSetNodeID ID; 4897 DependentTemplateName::Profile(ID, NNS, Operator); 4898 4899 void *InsertPos = 0; 4900 DependentTemplateName *QTN 4901 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4902 4903 if (QTN) 4904 return TemplateName(QTN); 4905 4906 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 4907 if (CanonNNS == NNS) { 4908 QTN = new (*this,4) DependentTemplateName(NNS, Operator); 4909 } else { 4910 TemplateName Canon = getDependentTemplateName(CanonNNS, Operator); 4911 QTN = new (*this,4) DependentTemplateName(NNS, Operator, Canon); 4912 4913 DependentTemplateName *CheckQTN 4914 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4915 assert(!CheckQTN && "Dependent template name canonicalization broken"); 4916 (void)CheckQTN; 4917 } 4918 4919 DependentTemplateNames.InsertNode(QTN, InsertPos); 4920 return TemplateName(QTN); 4921} 4922 4923TemplateName 4924ASTContext::getSubstTemplateTemplateParm(TemplateTemplateParmDecl *param, 4925 TemplateName replacement) const { 4926 llvm::FoldingSetNodeID ID; 4927 SubstTemplateTemplateParmStorage::Profile(ID, param, replacement); 4928 4929 void *insertPos = 0; 4930 SubstTemplateTemplateParmStorage *subst 4931 = SubstTemplateTemplateParms.FindNodeOrInsertPos(ID, insertPos); 4932 4933 if (!subst) { 4934 subst = new (*this) SubstTemplateTemplateParmStorage(param, replacement); 4935 SubstTemplateTemplateParms.InsertNode(subst, insertPos); 4936 } 4937 4938 return TemplateName(subst); 4939} 4940 4941TemplateName 4942ASTContext::getSubstTemplateTemplateParmPack(TemplateTemplateParmDecl *Param, 4943 const TemplateArgument &ArgPack) const { 4944 ASTContext &Self = const_cast<ASTContext &>(*this); 4945 llvm::FoldingSetNodeID ID; 4946 SubstTemplateTemplateParmPackStorage::Profile(ID, Self, Param, ArgPack); 4947 4948 void *InsertPos = 0; 4949 SubstTemplateTemplateParmPackStorage *Subst 4950 = SubstTemplateTemplateParmPacks.FindNodeOrInsertPos(ID, InsertPos); 4951 4952 if (!Subst) { 4953 Subst = new (*this) SubstTemplateTemplateParmPackStorage(Param, 4954 ArgPack.pack_size(), 4955 ArgPack.pack_begin()); 4956 SubstTemplateTemplateParmPacks.InsertNode(Subst, InsertPos); 4957 } 4958 4959 return TemplateName(Subst); 4960} 4961 4962/// getFromTargetType - Given one of the integer types provided by 4963/// TargetInfo, produce the corresponding type. The unsigned @p Type 4964/// is actually a value of type @c TargetInfo::IntType. 4965CanQualType ASTContext::getFromTargetType(unsigned Type) const { 4966 switch (Type) { 4967 case TargetInfo::NoInt: return CanQualType(); 4968 case TargetInfo::SignedShort: return ShortTy; 4969 case TargetInfo::UnsignedShort: return UnsignedShortTy; 4970 case TargetInfo::SignedInt: return IntTy; 4971 case TargetInfo::UnsignedInt: return UnsignedIntTy; 4972 case TargetInfo::SignedLong: return LongTy; 4973 case TargetInfo::UnsignedLong: return UnsignedLongTy; 4974 case TargetInfo::SignedLongLong: return LongLongTy; 4975 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy; 4976 } 4977 4978 llvm_unreachable("Unhandled TargetInfo::IntType value"); 4979} 4980 4981//===----------------------------------------------------------------------===// 4982// Type Predicates. 4983//===----------------------------------------------------------------------===// 4984 4985/// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 4986/// garbage collection attribute. 4987/// 4988Qualifiers::GC ASTContext::getObjCGCAttrKind(QualType Ty) const { 4989 if (getLangOptions().getGC() == LangOptions::NonGC) 4990 return Qualifiers::GCNone; 4991 4992 assert(getLangOptions().ObjC1); 4993 Qualifiers::GC GCAttrs = Ty.getObjCGCAttr(); 4994 4995 // Default behaviour under objective-C's gc is for ObjC pointers 4996 // (or pointers to them) be treated as though they were declared 4997 // as __strong. 4998 if (GCAttrs == Qualifiers::GCNone) { 4999 if (Ty->isObjCObjectPointerType() || Ty->isBlockPointerType()) 5000 return Qualifiers::Strong; 5001 else if (Ty->isPointerType()) 5002 return getObjCGCAttrKind(Ty->getAs<PointerType>()->getPointeeType()); 5003 } else { 5004 // It's not valid to set GC attributes on anything that isn't a 5005 // pointer. 5006#ifndef NDEBUG 5007 QualType CT = Ty->getCanonicalTypeInternal(); 5008 while (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 5009 CT = AT->getElementType(); 5010 assert(CT->isAnyPointerType() || CT->isBlockPointerType()); 5011#endif 5012 } 5013 return GCAttrs; 5014} 5015 5016//===----------------------------------------------------------------------===// 5017// Type Compatibility Testing 5018//===----------------------------------------------------------------------===// 5019 5020/// areCompatVectorTypes - Return true if the two specified vector types are 5021/// compatible. 5022static bool areCompatVectorTypes(const VectorType *LHS, 5023 const VectorType *RHS) { 5024 assert(LHS->isCanonicalUnqualified() && RHS->isCanonicalUnqualified()); 5025 return LHS->getElementType() == RHS->getElementType() && 5026 LHS->getNumElements() == RHS->getNumElements(); 5027} 5028 5029bool ASTContext::areCompatibleVectorTypes(QualType FirstVec, 5030 QualType SecondVec) { 5031 assert(FirstVec->isVectorType() && "FirstVec should be a vector type"); 5032 assert(SecondVec->isVectorType() && "SecondVec should be a vector type"); 5033 5034 if (hasSameUnqualifiedType(FirstVec, SecondVec)) 5035 return true; 5036 5037 // Treat Neon vector types and most AltiVec vector types as if they are the 5038 // equivalent GCC vector types. 5039 const VectorType *First = FirstVec->getAs<VectorType>(); 5040 const VectorType *Second = SecondVec->getAs<VectorType>(); 5041 if (First->getNumElements() == Second->getNumElements() && 5042 hasSameType(First->getElementType(), Second->getElementType()) && 5043 First->getVectorKind() != VectorType::AltiVecPixel && 5044 First->getVectorKind() != VectorType::AltiVecBool && 5045 Second->getVectorKind() != VectorType::AltiVecPixel && 5046 Second->getVectorKind() != VectorType::AltiVecBool) 5047 return true; 5048 5049 return false; 5050} 5051 5052//===----------------------------------------------------------------------===// 5053// ObjCQualifiedIdTypesAreCompatible - Compatibility testing for qualified id's. 5054//===----------------------------------------------------------------------===// 5055 5056/// ProtocolCompatibleWithProtocol - return 'true' if 'lProto' is in the 5057/// inheritance hierarchy of 'rProto'. 5058bool 5059ASTContext::ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 5060 ObjCProtocolDecl *rProto) const { 5061 if (lProto == rProto) 5062 return true; 5063 for (ObjCProtocolDecl::protocol_iterator PI = rProto->protocol_begin(), 5064 E = rProto->protocol_end(); PI != E; ++PI) 5065 if (ProtocolCompatibleWithProtocol(lProto, *PI)) 5066 return true; 5067 return false; 5068} 5069 5070/// QualifiedIdConformsQualifiedId - compare id<p,...> with id<p1,...> 5071/// return true if lhs's protocols conform to rhs's protocol; false 5072/// otherwise. 5073bool ASTContext::QualifiedIdConformsQualifiedId(QualType lhs, QualType rhs) { 5074 if (lhs->isObjCQualifiedIdType() && rhs->isObjCQualifiedIdType()) 5075 return ObjCQualifiedIdTypesAreCompatible(lhs, rhs, false); 5076 return false; 5077} 5078 5079/// ObjCQualifiedClassTypesAreCompatible - compare Class<p,...> and 5080/// Class<p1, ...>. 5081bool ASTContext::ObjCQualifiedClassTypesAreCompatible(QualType lhs, 5082 QualType rhs) { 5083 const ObjCObjectPointerType *lhsQID = lhs->getAs<ObjCObjectPointerType>(); 5084 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 5085 assert ((lhsQID && rhsOPT) && "ObjCQualifiedClassTypesAreCompatible"); 5086 5087 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 5088 E = lhsQID->qual_end(); I != E; ++I) { 5089 bool match = false; 5090 ObjCProtocolDecl *lhsProto = *I; 5091 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 5092 E = rhsOPT->qual_end(); J != E; ++J) { 5093 ObjCProtocolDecl *rhsProto = *J; 5094 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto)) { 5095 match = true; 5096 break; 5097 } 5098 } 5099 if (!match) 5100 return false; 5101 } 5102 return true; 5103} 5104 5105/// ObjCQualifiedIdTypesAreCompatible - We know that one of lhs/rhs is an 5106/// ObjCQualifiedIDType. 5107bool ASTContext::ObjCQualifiedIdTypesAreCompatible(QualType lhs, QualType rhs, 5108 bool compare) { 5109 // Allow id<P..> and an 'id' or void* type in all cases. 5110 if (lhs->isVoidPointerType() || 5111 lhs->isObjCIdType() || lhs->isObjCClassType()) 5112 return true; 5113 else if (rhs->isVoidPointerType() || 5114 rhs->isObjCIdType() || rhs->isObjCClassType()) 5115 return true; 5116 5117 if (const ObjCObjectPointerType *lhsQID = lhs->getAsObjCQualifiedIdType()) { 5118 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 5119 5120 if (!rhsOPT) return false; 5121 5122 if (rhsOPT->qual_empty()) { 5123 // If the RHS is a unqualified interface pointer "NSString*", 5124 // make sure we check the class hierarchy. 5125 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 5126 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 5127 E = lhsQID->qual_end(); I != E; ++I) { 5128 // when comparing an id<P> on lhs with a static type on rhs, 5129 // see if static class implements all of id's protocols, directly or 5130 // through its super class and categories. 5131 if (!rhsID->ClassImplementsProtocol(*I, true)) 5132 return false; 5133 } 5134 } 5135 // If there are no qualifiers and no interface, we have an 'id'. 5136 return true; 5137 } 5138 // Both the right and left sides have qualifiers. 5139 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 5140 E = lhsQID->qual_end(); I != E; ++I) { 5141 ObjCProtocolDecl *lhsProto = *I; 5142 bool match = false; 5143 5144 // when comparing an id<P> on lhs with a static type on rhs, 5145 // see if static class implements all of id's protocols, directly or 5146 // through its super class and categories. 5147 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 5148 E = rhsOPT->qual_end(); J != E; ++J) { 5149 ObjCProtocolDecl *rhsProto = *J; 5150 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 5151 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 5152 match = true; 5153 break; 5154 } 5155 } 5156 // If the RHS is a qualified interface pointer "NSString<P>*", 5157 // make sure we check the class hierarchy. 5158 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 5159 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 5160 E = lhsQID->qual_end(); I != E; ++I) { 5161 // when comparing an id<P> on lhs with a static type on rhs, 5162 // see if static class implements all of id's protocols, directly or 5163 // through its super class and categories. 5164 if (rhsID->ClassImplementsProtocol(*I, true)) { 5165 match = true; 5166 break; 5167 } 5168 } 5169 } 5170 if (!match) 5171 return false; 5172 } 5173 5174 return true; 5175 } 5176 5177 const ObjCObjectPointerType *rhsQID = rhs->getAsObjCQualifiedIdType(); 5178 assert(rhsQID && "One of the LHS/RHS should be id<x>"); 5179 5180 if (const ObjCObjectPointerType *lhsOPT = 5181 lhs->getAsObjCInterfacePointerType()) { 5182 // If both the right and left sides have qualifiers. 5183 for (ObjCObjectPointerType::qual_iterator I = lhsOPT->qual_begin(), 5184 E = lhsOPT->qual_end(); I != E; ++I) { 5185 ObjCProtocolDecl *lhsProto = *I; 5186 bool match = false; 5187 5188 // when comparing an id<P> on rhs with a static type on lhs, 5189 // see if static class implements all of id's protocols, directly or 5190 // through its super class and categories. 5191 // First, lhs protocols in the qualifier list must be found, direct 5192 // or indirect in rhs's qualifier list or it is a mismatch. 5193 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 5194 E = rhsQID->qual_end(); J != E; ++J) { 5195 ObjCProtocolDecl *rhsProto = *J; 5196 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 5197 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 5198 match = true; 5199 break; 5200 } 5201 } 5202 if (!match) 5203 return false; 5204 } 5205 5206 // Static class's protocols, or its super class or category protocols 5207 // must be found, direct or indirect in rhs's qualifier list or it is a mismatch. 5208 if (ObjCInterfaceDecl *lhsID = lhsOPT->getInterfaceDecl()) { 5209 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 5210 CollectInheritedProtocols(lhsID, LHSInheritedProtocols); 5211 // This is rather dubious but matches gcc's behavior. If lhs has 5212 // no type qualifier and its class has no static protocol(s) 5213 // assume that it is mismatch. 5214 if (LHSInheritedProtocols.empty() && lhsOPT->qual_empty()) 5215 return false; 5216 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 5217 LHSInheritedProtocols.begin(), 5218 E = LHSInheritedProtocols.end(); I != E; ++I) { 5219 bool match = false; 5220 ObjCProtocolDecl *lhsProto = (*I); 5221 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 5222 E = rhsQID->qual_end(); J != E; ++J) { 5223 ObjCProtocolDecl *rhsProto = *J; 5224 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 5225 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 5226 match = true; 5227 break; 5228 } 5229 } 5230 if (!match) 5231 return false; 5232 } 5233 } 5234 return true; 5235 } 5236 return false; 5237} 5238 5239/// canAssignObjCInterfaces - Return true if the two interface types are 5240/// compatible for assignment from RHS to LHS. This handles validation of any 5241/// protocol qualifiers on the LHS or RHS. 5242/// 5243bool ASTContext::canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 5244 const ObjCObjectPointerType *RHSOPT) { 5245 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 5246 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 5247 5248 // If either type represents the built-in 'id' or 'Class' types, return true. 5249 if (LHS->isObjCUnqualifiedIdOrClass() || 5250 RHS->isObjCUnqualifiedIdOrClass()) 5251 return true; 5252 5253 if (LHS->isObjCQualifiedId() || RHS->isObjCQualifiedId()) 5254 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 5255 QualType(RHSOPT,0), 5256 false); 5257 5258 if (LHS->isObjCQualifiedClass() && RHS->isObjCQualifiedClass()) 5259 return ObjCQualifiedClassTypesAreCompatible(QualType(LHSOPT,0), 5260 QualType(RHSOPT,0)); 5261 5262 // If we have 2 user-defined types, fall into that path. 5263 if (LHS->getInterface() && RHS->getInterface()) 5264 return canAssignObjCInterfaces(LHS, RHS); 5265 5266 return false; 5267} 5268 5269/// canAssignObjCInterfacesInBlockPointer - This routine is specifically written 5270/// for providing type-safety for objective-c pointers used to pass/return 5271/// arguments in block literals. When passed as arguments, passing 'A*' where 5272/// 'id' is expected is not OK. Passing 'Sub *" where 'Super *" is expected is 5273/// not OK. For the return type, the opposite is not OK. 5274bool ASTContext::canAssignObjCInterfacesInBlockPointer( 5275 const ObjCObjectPointerType *LHSOPT, 5276 const ObjCObjectPointerType *RHSOPT, 5277 bool BlockReturnType) { 5278 if (RHSOPT->isObjCBuiltinType() || LHSOPT->isObjCIdType()) 5279 return true; 5280 5281 if (LHSOPT->isObjCBuiltinType()) { 5282 return RHSOPT->isObjCBuiltinType() || RHSOPT->isObjCQualifiedIdType(); 5283 } 5284 5285 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 5286 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 5287 QualType(RHSOPT,0), 5288 false); 5289 5290 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 5291 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 5292 if (LHS && RHS) { // We have 2 user-defined types. 5293 if (LHS != RHS) { 5294 if (LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 5295 return BlockReturnType; 5296 if (RHS->getDecl()->isSuperClassOf(LHS->getDecl())) 5297 return !BlockReturnType; 5298 } 5299 else 5300 return true; 5301 } 5302 return false; 5303} 5304 5305/// getIntersectionOfProtocols - This routine finds the intersection of set 5306/// of protocols inherited from two distinct objective-c pointer objects. 5307/// It is used to build composite qualifier list of the composite type of 5308/// the conditional expression involving two objective-c pointer objects. 5309static 5310void getIntersectionOfProtocols(ASTContext &Context, 5311 const ObjCObjectPointerType *LHSOPT, 5312 const ObjCObjectPointerType *RHSOPT, 5313 SmallVectorImpl<ObjCProtocolDecl *> &IntersectionOfProtocols) { 5314 5315 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 5316 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 5317 assert(LHS->getInterface() && "LHS must have an interface base"); 5318 assert(RHS->getInterface() && "RHS must have an interface base"); 5319 5320 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> InheritedProtocolSet; 5321 unsigned LHSNumProtocols = LHS->getNumProtocols(); 5322 if (LHSNumProtocols > 0) 5323 InheritedProtocolSet.insert(LHS->qual_begin(), LHS->qual_end()); 5324 else { 5325 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 5326 Context.CollectInheritedProtocols(LHS->getInterface(), 5327 LHSInheritedProtocols); 5328 InheritedProtocolSet.insert(LHSInheritedProtocols.begin(), 5329 LHSInheritedProtocols.end()); 5330 } 5331 5332 unsigned RHSNumProtocols = RHS->getNumProtocols(); 5333 if (RHSNumProtocols > 0) { 5334 ObjCProtocolDecl **RHSProtocols = 5335 const_cast<ObjCProtocolDecl **>(RHS->qual_begin()); 5336 for (unsigned i = 0; i < RHSNumProtocols; ++i) 5337 if (InheritedProtocolSet.count(RHSProtocols[i])) 5338 IntersectionOfProtocols.push_back(RHSProtocols[i]); 5339 } else { 5340 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> RHSInheritedProtocols; 5341 Context.CollectInheritedProtocols(RHS->getInterface(), 5342 RHSInheritedProtocols); 5343 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 5344 RHSInheritedProtocols.begin(), 5345 E = RHSInheritedProtocols.end(); I != E; ++I) 5346 if (InheritedProtocolSet.count((*I))) 5347 IntersectionOfProtocols.push_back((*I)); 5348 } 5349} 5350 5351/// areCommonBaseCompatible - Returns common base class of the two classes if 5352/// one found. Note that this is O'2 algorithm. But it will be called as the 5353/// last type comparison in a ?-exp of ObjC pointer types before a 5354/// warning is issued. So, its invokation is extremely rare. 5355QualType ASTContext::areCommonBaseCompatible( 5356 const ObjCObjectPointerType *Lptr, 5357 const ObjCObjectPointerType *Rptr) { 5358 const ObjCObjectType *LHS = Lptr->getObjectType(); 5359 const ObjCObjectType *RHS = Rptr->getObjectType(); 5360 const ObjCInterfaceDecl* LDecl = LHS->getInterface(); 5361 const ObjCInterfaceDecl* RDecl = RHS->getInterface(); 5362 if (!LDecl || !RDecl || (LDecl == RDecl)) 5363 return QualType(); 5364 5365 do { 5366 LHS = cast<ObjCInterfaceType>(getObjCInterfaceType(LDecl)); 5367 if (canAssignObjCInterfaces(LHS, RHS)) { 5368 SmallVector<ObjCProtocolDecl *, 8> Protocols; 5369 getIntersectionOfProtocols(*this, Lptr, Rptr, Protocols); 5370 5371 QualType Result = QualType(LHS, 0); 5372 if (!Protocols.empty()) 5373 Result = getObjCObjectType(Result, Protocols.data(), Protocols.size()); 5374 Result = getObjCObjectPointerType(Result); 5375 return Result; 5376 } 5377 } while ((LDecl = LDecl->getSuperClass())); 5378 5379 return QualType(); 5380} 5381 5382bool ASTContext::canAssignObjCInterfaces(const ObjCObjectType *LHS, 5383 const ObjCObjectType *RHS) { 5384 assert(LHS->getInterface() && "LHS is not an interface type"); 5385 assert(RHS->getInterface() && "RHS is not an interface type"); 5386 5387 // Verify that the base decls are compatible: the RHS must be a subclass of 5388 // the LHS. 5389 if (!LHS->getInterface()->isSuperClassOf(RHS->getInterface())) 5390 return false; 5391 5392 // RHS must have a superset of the protocols in the LHS. If the LHS is not 5393 // protocol qualified at all, then we are good. 5394 if (LHS->getNumProtocols() == 0) 5395 return true; 5396 5397 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, 5398 // more detailed analysis is required. 5399 if (RHS->getNumProtocols() == 0) { 5400 // OK, if LHS is a superclass of RHS *and* 5401 // this superclass is assignment compatible with LHS. 5402 // false otherwise. 5403 bool IsSuperClass = 5404 LHS->getInterface()->isSuperClassOf(RHS->getInterface()); 5405 if (IsSuperClass) { 5406 // OK if conversion of LHS to SuperClass results in narrowing of types 5407 // ; i.e., SuperClass may implement at least one of the protocols 5408 // in LHS's protocol list. Example, SuperObj<P1> = lhs<P1,P2> is ok. 5409 // But not SuperObj<P1,P2,P3> = lhs<P1,P2>. 5410 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> SuperClassInheritedProtocols; 5411 CollectInheritedProtocols(RHS->getInterface(), SuperClassInheritedProtocols); 5412 // If super class has no protocols, it is not a match. 5413 if (SuperClassInheritedProtocols.empty()) 5414 return false; 5415 5416 for (ObjCObjectType::qual_iterator LHSPI = LHS->qual_begin(), 5417 LHSPE = LHS->qual_end(); 5418 LHSPI != LHSPE; LHSPI++) { 5419 bool SuperImplementsProtocol = false; 5420 ObjCProtocolDecl *LHSProto = (*LHSPI); 5421 5422 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 5423 SuperClassInheritedProtocols.begin(), 5424 E = SuperClassInheritedProtocols.end(); I != E; ++I) { 5425 ObjCProtocolDecl *SuperClassProto = (*I); 5426 if (SuperClassProto->lookupProtocolNamed(LHSProto->getIdentifier())) { 5427 SuperImplementsProtocol = true; 5428 break; 5429 } 5430 } 5431 if (!SuperImplementsProtocol) 5432 return false; 5433 } 5434 return true; 5435 } 5436 return false; 5437 } 5438 5439 for (ObjCObjectType::qual_iterator LHSPI = LHS->qual_begin(), 5440 LHSPE = LHS->qual_end(); 5441 LHSPI != LHSPE; LHSPI++) { 5442 bool RHSImplementsProtocol = false; 5443 5444 // If the RHS doesn't implement the protocol on the left, the types 5445 // are incompatible. 5446 for (ObjCObjectType::qual_iterator RHSPI = RHS->qual_begin(), 5447 RHSPE = RHS->qual_end(); 5448 RHSPI != RHSPE; RHSPI++) { 5449 if ((*RHSPI)->lookupProtocolNamed((*LHSPI)->getIdentifier())) { 5450 RHSImplementsProtocol = true; 5451 break; 5452 } 5453 } 5454 // FIXME: For better diagnostics, consider passing back the protocol name. 5455 if (!RHSImplementsProtocol) 5456 return false; 5457 } 5458 // The RHS implements all protocols listed on the LHS. 5459 return true; 5460} 5461 5462bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) { 5463 // get the "pointed to" types 5464 const ObjCObjectPointerType *LHSOPT = LHS->getAs<ObjCObjectPointerType>(); 5465 const ObjCObjectPointerType *RHSOPT = RHS->getAs<ObjCObjectPointerType>(); 5466 5467 if (!LHSOPT || !RHSOPT) 5468 return false; 5469 5470 return canAssignObjCInterfaces(LHSOPT, RHSOPT) || 5471 canAssignObjCInterfaces(RHSOPT, LHSOPT); 5472} 5473 5474bool ASTContext::canBindObjCObjectType(QualType To, QualType From) { 5475 return canAssignObjCInterfaces( 5476 getObjCObjectPointerType(To)->getAs<ObjCObjectPointerType>(), 5477 getObjCObjectPointerType(From)->getAs<ObjCObjectPointerType>()); 5478} 5479 5480/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible, 5481/// both shall have the identically qualified version of a compatible type. 5482/// C99 6.2.7p1: Two types have compatible types if their types are the 5483/// same. See 6.7.[2,3,5] for additional rules. 5484bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS, 5485 bool CompareUnqualified) { 5486 if (getLangOptions().CPlusPlus) 5487 return hasSameType(LHS, RHS); 5488 5489 return !mergeTypes(LHS, RHS, false, CompareUnqualified).isNull(); 5490} 5491 5492bool ASTContext::propertyTypesAreCompatible(QualType LHS, QualType RHS) { 5493 return typesAreCompatible(LHS, RHS); 5494} 5495 5496bool ASTContext::typesAreBlockPointerCompatible(QualType LHS, QualType RHS) { 5497 return !mergeTypes(LHS, RHS, true).isNull(); 5498} 5499 5500/// mergeTransparentUnionType - if T is a transparent union type and a member 5501/// of T is compatible with SubType, return the merged type, else return 5502/// QualType() 5503QualType ASTContext::mergeTransparentUnionType(QualType T, QualType SubType, 5504 bool OfBlockPointer, 5505 bool Unqualified) { 5506 if (const RecordType *UT = T->getAsUnionType()) { 5507 RecordDecl *UD = UT->getDecl(); 5508 if (UD->hasAttr<TransparentUnionAttr>()) { 5509 for (RecordDecl::field_iterator it = UD->field_begin(), 5510 itend = UD->field_end(); it != itend; ++it) { 5511 QualType ET = it->getType().getUnqualifiedType(); 5512 QualType MT = mergeTypes(ET, SubType, OfBlockPointer, Unqualified); 5513 if (!MT.isNull()) 5514 return MT; 5515 } 5516 } 5517 } 5518 5519 return QualType(); 5520} 5521 5522/// mergeFunctionArgumentTypes - merge two types which appear as function 5523/// argument types 5524QualType ASTContext::mergeFunctionArgumentTypes(QualType lhs, QualType rhs, 5525 bool OfBlockPointer, 5526 bool Unqualified) { 5527 // GNU extension: two types are compatible if they appear as a function 5528 // argument, one of the types is a transparent union type and the other 5529 // type is compatible with a union member 5530 QualType lmerge = mergeTransparentUnionType(lhs, rhs, OfBlockPointer, 5531 Unqualified); 5532 if (!lmerge.isNull()) 5533 return lmerge; 5534 5535 QualType rmerge = mergeTransparentUnionType(rhs, lhs, OfBlockPointer, 5536 Unqualified); 5537 if (!rmerge.isNull()) 5538 return rmerge; 5539 5540 return mergeTypes(lhs, rhs, OfBlockPointer, Unqualified); 5541} 5542 5543QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs, 5544 bool OfBlockPointer, 5545 bool Unqualified) { 5546 const FunctionType *lbase = lhs->getAs<FunctionType>(); 5547 const FunctionType *rbase = rhs->getAs<FunctionType>(); 5548 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 5549 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 5550 bool allLTypes = true; 5551 bool allRTypes = true; 5552 5553 // Check return type 5554 QualType retType; 5555 if (OfBlockPointer) { 5556 QualType RHS = rbase->getResultType(); 5557 QualType LHS = lbase->getResultType(); 5558 bool UnqualifiedResult = Unqualified; 5559 if (!UnqualifiedResult) 5560 UnqualifiedResult = (!RHS.hasQualifiers() && LHS.hasQualifiers()); 5561 retType = mergeTypes(LHS, RHS, true, UnqualifiedResult, true); 5562 } 5563 else 5564 retType = mergeTypes(lbase->getResultType(), rbase->getResultType(), false, 5565 Unqualified); 5566 if (retType.isNull()) return QualType(); 5567 5568 if (Unqualified) 5569 retType = retType.getUnqualifiedType(); 5570 5571 CanQualType LRetType = getCanonicalType(lbase->getResultType()); 5572 CanQualType RRetType = getCanonicalType(rbase->getResultType()); 5573 if (Unqualified) { 5574 LRetType = LRetType.getUnqualifiedType(); 5575 RRetType = RRetType.getUnqualifiedType(); 5576 } 5577 5578 if (getCanonicalType(retType) != LRetType) 5579 allLTypes = false; 5580 if (getCanonicalType(retType) != RRetType) 5581 allRTypes = false; 5582 5583 // FIXME: double check this 5584 // FIXME: should we error if lbase->getRegParmAttr() != 0 && 5585 // rbase->getRegParmAttr() != 0 && 5586 // lbase->getRegParmAttr() != rbase->getRegParmAttr()? 5587 FunctionType::ExtInfo lbaseInfo = lbase->getExtInfo(); 5588 FunctionType::ExtInfo rbaseInfo = rbase->getExtInfo(); 5589 5590 // Compatible functions must have compatible calling conventions 5591 if (!isSameCallConv(lbaseInfo.getCC(), rbaseInfo.getCC())) 5592 return QualType(); 5593 5594 // Regparm is part of the calling convention. 5595 if (lbaseInfo.getHasRegParm() != rbaseInfo.getHasRegParm()) 5596 return QualType(); 5597 if (lbaseInfo.getRegParm() != rbaseInfo.getRegParm()) 5598 return QualType(); 5599 5600 if (lbaseInfo.getProducesResult() != rbaseInfo.getProducesResult()) 5601 return QualType(); 5602 5603 // functypes which return are preferred over those that do not. 5604 if (lbaseInfo.getNoReturn() && !rbaseInfo.getNoReturn()) 5605 allLTypes = false; 5606 else if (!lbaseInfo.getNoReturn() && rbaseInfo.getNoReturn()) 5607 allRTypes = false; 5608 // FIXME: some uses, e.g. conditional exprs, really want this to be 'both'. 5609 bool NoReturn = lbaseInfo.getNoReturn() || rbaseInfo.getNoReturn(); 5610 5611 FunctionType::ExtInfo einfo = lbaseInfo.withNoReturn(NoReturn); 5612 5613 if (lproto && rproto) { // two C99 style function prototypes 5614 assert(!lproto->hasExceptionSpec() && !rproto->hasExceptionSpec() && 5615 "C++ shouldn't be here"); 5616 unsigned lproto_nargs = lproto->getNumArgs(); 5617 unsigned rproto_nargs = rproto->getNumArgs(); 5618 5619 // Compatible functions must have the same number of arguments 5620 if (lproto_nargs != rproto_nargs) 5621 return QualType(); 5622 5623 // Variadic and non-variadic functions aren't compatible 5624 if (lproto->isVariadic() != rproto->isVariadic()) 5625 return QualType(); 5626 5627 if (lproto->getTypeQuals() != rproto->getTypeQuals()) 5628 return QualType(); 5629 5630 if (LangOpts.ObjCAutoRefCount && 5631 !FunctionTypesMatchOnNSConsumedAttrs(rproto, lproto)) 5632 return QualType(); 5633 5634 // Check argument compatibility 5635 SmallVector<QualType, 10> types; 5636 for (unsigned i = 0; i < lproto_nargs; i++) { 5637 QualType largtype = lproto->getArgType(i).getUnqualifiedType(); 5638 QualType rargtype = rproto->getArgType(i).getUnqualifiedType(); 5639 QualType argtype = mergeFunctionArgumentTypes(largtype, rargtype, 5640 OfBlockPointer, 5641 Unqualified); 5642 if (argtype.isNull()) return QualType(); 5643 5644 if (Unqualified) 5645 argtype = argtype.getUnqualifiedType(); 5646 5647 types.push_back(argtype); 5648 if (Unqualified) { 5649 largtype = largtype.getUnqualifiedType(); 5650 rargtype = rargtype.getUnqualifiedType(); 5651 } 5652 5653 if (getCanonicalType(argtype) != getCanonicalType(largtype)) 5654 allLTypes = false; 5655 if (getCanonicalType(argtype) != getCanonicalType(rargtype)) 5656 allRTypes = false; 5657 } 5658 5659 if (allLTypes) return lhs; 5660 if (allRTypes) return rhs; 5661 5662 FunctionProtoType::ExtProtoInfo EPI = lproto->getExtProtoInfo(); 5663 EPI.ExtInfo = einfo; 5664 return getFunctionType(retType, types.begin(), types.size(), EPI); 5665 } 5666 5667 if (lproto) allRTypes = false; 5668 if (rproto) allLTypes = false; 5669 5670 const FunctionProtoType *proto = lproto ? lproto : rproto; 5671 if (proto) { 5672 assert(!proto->hasExceptionSpec() && "C++ shouldn't be here"); 5673 if (proto->isVariadic()) return QualType(); 5674 // Check that the types are compatible with the types that 5675 // would result from default argument promotions (C99 6.7.5.3p15). 5676 // The only types actually affected are promotable integer 5677 // types and floats, which would be passed as a different 5678 // type depending on whether the prototype is visible. 5679 unsigned proto_nargs = proto->getNumArgs(); 5680 for (unsigned i = 0; i < proto_nargs; ++i) { 5681 QualType argTy = proto->getArgType(i); 5682 5683 // Look at the promotion type of enum types, since that is the type used 5684 // to pass enum values. 5685 if (const EnumType *Enum = argTy->getAs<EnumType>()) 5686 argTy = Enum->getDecl()->getPromotionType(); 5687 5688 if (argTy->isPromotableIntegerType() || 5689 getCanonicalType(argTy).getUnqualifiedType() == FloatTy) 5690 return QualType(); 5691 } 5692 5693 if (allLTypes) return lhs; 5694 if (allRTypes) return rhs; 5695 5696 FunctionProtoType::ExtProtoInfo EPI = proto->getExtProtoInfo(); 5697 EPI.ExtInfo = einfo; 5698 return getFunctionType(retType, proto->arg_type_begin(), 5699 proto->getNumArgs(), EPI); 5700 } 5701 5702 if (allLTypes) return lhs; 5703 if (allRTypes) return rhs; 5704 return getFunctionNoProtoType(retType, einfo); 5705} 5706 5707QualType ASTContext::mergeTypes(QualType LHS, QualType RHS, 5708 bool OfBlockPointer, 5709 bool Unqualified, bool BlockReturnType) { 5710 // C++ [expr]: If an expression initially has the type "reference to T", the 5711 // type is adjusted to "T" prior to any further analysis, the expression 5712 // designates the object or function denoted by the reference, and the 5713 // expression is an lvalue unless the reference is an rvalue reference and 5714 // the expression is a function call (possibly inside parentheses). 5715 assert(!LHS->getAs<ReferenceType>() && "LHS is a reference type?"); 5716 assert(!RHS->getAs<ReferenceType>() && "RHS is a reference type?"); 5717 5718 if (Unqualified) { 5719 LHS = LHS.getUnqualifiedType(); 5720 RHS = RHS.getUnqualifiedType(); 5721 } 5722 5723 QualType LHSCan = getCanonicalType(LHS), 5724 RHSCan = getCanonicalType(RHS); 5725 5726 // If two types are identical, they are compatible. 5727 if (LHSCan == RHSCan) 5728 return LHS; 5729 5730 // If the qualifiers are different, the types aren't compatible... mostly. 5731 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 5732 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 5733 if (LQuals != RQuals) { 5734 // If any of these qualifiers are different, we have a type 5735 // mismatch. 5736 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 5737 LQuals.getAddressSpace() != RQuals.getAddressSpace() || 5738 LQuals.getObjCLifetime() != RQuals.getObjCLifetime()) 5739 return QualType(); 5740 5741 // Exactly one GC qualifier difference is allowed: __strong is 5742 // okay if the other type has no GC qualifier but is an Objective 5743 // C object pointer (i.e. implicitly strong by default). We fix 5744 // this by pretending that the unqualified type was actually 5745 // qualified __strong. 5746 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 5747 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 5748 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 5749 5750 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 5751 return QualType(); 5752 5753 if (GC_L == Qualifiers::Strong && RHSCan->isObjCObjectPointerType()) { 5754 return mergeTypes(LHS, getObjCGCQualType(RHS, Qualifiers::Strong)); 5755 } 5756 if (GC_R == Qualifiers::Strong && LHSCan->isObjCObjectPointerType()) { 5757 return mergeTypes(getObjCGCQualType(LHS, Qualifiers::Strong), RHS); 5758 } 5759 return QualType(); 5760 } 5761 5762 // Okay, qualifiers are equal. 5763 5764 Type::TypeClass LHSClass = LHSCan->getTypeClass(); 5765 Type::TypeClass RHSClass = RHSCan->getTypeClass(); 5766 5767 // We want to consider the two function types to be the same for these 5768 // comparisons, just force one to the other. 5769 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto; 5770 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto; 5771 5772 // Same as above for arrays 5773 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray) 5774 LHSClass = Type::ConstantArray; 5775 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray) 5776 RHSClass = Type::ConstantArray; 5777 5778 // ObjCInterfaces are just specialized ObjCObjects. 5779 if (LHSClass == Type::ObjCInterface) LHSClass = Type::ObjCObject; 5780 if (RHSClass == Type::ObjCInterface) RHSClass = Type::ObjCObject; 5781 5782 // Canonicalize ExtVector -> Vector. 5783 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector; 5784 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector; 5785 5786 // If the canonical type classes don't match. 5787 if (LHSClass != RHSClass) { 5788 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char, 5789 // a signed integer type, or an unsigned integer type. 5790 // Compatibility is based on the underlying type, not the promotion 5791 // type. 5792 if (const EnumType* ETy = LHS->getAs<EnumType>()) { 5793 if (ETy->getDecl()->getIntegerType() == RHSCan.getUnqualifiedType()) 5794 return RHS; 5795 } 5796 if (const EnumType* ETy = RHS->getAs<EnumType>()) { 5797 if (ETy->getDecl()->getIntegerType() == LHSCan.getUnqualifiedType()) 5798 return LHS; 5799 } 5800 5801 return QualType(); 5802 } 5803 5804 // The canonical type classes match. 5805 switch (LHSClass) { 5806#define TYPE(Class, Base) 5807#define ABSTRACT_TYPE(Class, Base) 5808#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) case Type::Class: 5809#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 5810#define DEPENDENT_TYPE(Class, Base) case Type::Class: 5811#include "clang/AST/TypeNodes.def" 5812 llvm_unreachable("Non-canonical and dependent types shouldn't get here"); 5813 5814 case Type::LValueReference: 5815 case Type::RValueReference: 5816 case Type::MemberPointer: 5817 llvm_unreachable("C++ should never be in mergeTypes"); 5818 5819 case Type::ObjCInterface: 5820 case Type::IncompleteArray: 5821 case Type::VariableArray: 5822 case Type::FunctionProto: 5823 case Type::ExtVector: 5824 llvm_unreachable("Types are eliminated above"); 5825 5826 case Type::Pointer: 5827 { 5828 // Merge two pointer types, while trying to preserve typedef info 5829 QualType LHSPointee = LHS->getAs<PointerType>()->getPointeeType(); 5830 QualType RHSPointee = RHS->getAs<PointerType>()->getPointeeType(); 5831 if (Unqualified) { 5832 LHSPointee = LHSPointee.getUnqualifiedType(); 5833 RHSPointee = RHSPointee.getUnqualifiedType(); 5834 } 5835 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, false, 5836 Unqualified); 5837 if (ResultType.isNull()) return QualType(); 5838 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 5839 return LHS; 5840 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 5841 return RHS; 5842 return getPointerType(ResultType); 5843 } 5844 case Type::BlockPointer: 5845 { 5846 // Merge two block pointer types, while trying to preserve typedef info 5847 QualType LHSPointee = LHS->getAs<BlockPointerType>()->getPointeeType(); 5848 QualType RHSPointee = RHS->getAs<BlockPointerType>()->getPointeeType(); 5849 if (Unqualified) { 5850 LHSPointee = LHSPointee.getUnqualifiedType(); 5851 RHSPointee = RHSPointee.getUnqualifiedType(); 5852 } 5853 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, OfBlockPointer, 5854 Unqualified); 5855 if (ResultType.isNull()) return QualType(); 5856 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 5857 return LHS; 5858 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 5859 return RHS; 5860 return getBlockPointerType(ResultType); 5861 } 5862 case Type::Atomic: 5863 { 5864 // Merge two pointer types, while trying to preserve typedef info 5865 QualType LHSValue = LHS->getAs<AtomicType>()->getValueType(); 5866 QualType RHSValue = RHS->getAs<AtomicType>()->getValueType(); 5867 if (Unqualified) { 5868 LHSValue = LHSValue.getUnqualifiedType(); 5869 RHSValue = RHSValue.getUnqualifiedType(); 5870 } 5871 QualType ResultType = mergeTypes(LHSValue, RHSValue, false, 5872 Unqualified); 5873 if (ResultType.isNull()) return QualType(); 5874 if (getCanonicalType(LHSValue) == getCanonicalType(ResultType)) 5875 return LHS; 5876 if (getCanonicalType(RHSValue) == getCanonicalType(ResultType)) 5877 return RHS; 5878 return getAtomicType(ResultType); 5879 } 5880 case Type::ConstantArray: 5881 { 5882 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS); 5883 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS); 5884 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize()) 5885 return QualType(); 5886 5887 QualType LHSElem = getAsArrayType(LHS)->getElementType(); 5888 QualType RHSElem = getAsArrayType(RHS)->getElementType(); 5889 if (Unqualified) { 5890 LHSElem = LHSElem.getUnqualifiedType(); 5891 RHSElem = RHSElem.getUnqualifiedType(); 5892 } 5893 5894 QualType ResultType = mergeTypes(LHSElem, RHSElem, false, Unqualified); 5895 if (ResultType.isNull()) return QualType(); 5896 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 5897 return LHS; 5898 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 5899 return RHS; 5900 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(), 5901 ArrayType::ArraySizeModifier(), 0); 5902 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(), 5903 ArrayType::ArraySizeModifier(), 0); 5904 const VariableArrayType* LVAT = getAsVariableArrayType(LHS); 5905 const VariableArrayType* RVAT = getAsVariableArrayType(RHS); 5906 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 5907 return LHS; 5908 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 5909 return RHS; 5910 if (LVAT) { 5911 // FIXME: This isn't correct! But tricky to implement because 5912 // the array's size has to be the size of LHS, but the type 5913 // has to be different. 5914 return LHS; 5915 } 5916 if (RVAT) { 5917 // FIXME: This isn't correct! But tricky to implement because 5918 // the array's size has to be the size of RHS, but the type 5919 // has to be different. 5920 return RHS; 5921 } 5922 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS; 5923 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS; 5924 return getIncompleteArrayType(ResultType, 5925 ArrayType::ArraySizeModifier(), 0); 5926 } 5927 case Type::FunctionNoProto: 5928 return mergeFunctionTypes(LHS, RHS, OfBlockPointer, Unqualified); 5929 case Type::Record: 5930 case Type::Enum: 5931 return QualType(); 5932 case Type::Builtin: 5933 // Only exactly equal builtin types are compatible, which is tested above. 5934 return QualType(); 5935 case Type::Complex: 5936 // Distinct complex types are incompatible. 5937 return QualType(); 5938 case Type::Vector: 5939 // FIXME: The merged type should be an ExtVector! 5940 if (areCompatVectorTypes(LHSCan->getAs<VectorType>(), 5941 RHSCan->getAs<VectorType>())) 5942 return LHS; 5943 return QualType(); 5944 case Type::ObjCObject: { 5945 // Check if the types are assignment compatible. 5946 // FIXME: This should be type compatibility, e.g. whether 5947 // "LHS x; RHS x;" at global scope is legal. 5948 const ObjCObjectType* LHSIface = LHS->getAs<ObjCObjectType>(); 5949 const ObjCObjectType* RHSIface = RHS->getAs<ObjCObjectType>(); 5950 if (canAssignObjCInterfaces(LHSIface, RHSIface)) 5951 return LHS; 5952 5953 return QualType(); 5954 } 5955 case Type::ObjCObjectPointer: { 5956 if (OfBlockPointer) { 5957 if (canAssignObjCInterfacesInBlockPointer( 5958 LHS->getAs<ObjCObjectPointerType>(), 5959 RHS->getAs<ObjCObjectPointerType>(), 5960 BlockReturnType)) 5961 return LHS; 5962 return QualType(); 5963 } 5964 if (canAssignObjCInterfaces(LHS->getAs<ObjCObjectPointerType>(), 5965 RHS->getAs<ObjCObjectPointerType>())) 5966 return LHS; 5967 5968 return QualType(); 5969 } 5970 } 5971 5972 return QualType(); 5973} 5974 5975bool ASTContext::FunctionTypesMatchOnNSConsumedAttrs( 5976 const FunctionProtoType *FromFunctionType, 5977 const FunctionProtoType *ToFunctionType) { 5978 if (FromFunctionType->hasAnyConsumedArgs() != 5979 ToFunctionType->hasAnyConsumedArgs()) 5980 return false; 5981 FunctionProtoType::ExtProtoInfo FromEPI = 5982 FromFunctionType->getExtProtoInfo(); 5983 FunctionProtoType::ExtProtoInfo ToEPI = 5984 ToFunctionType->getExtProtoInfo(); 5985 if (FromEPI.ConsumedArguments && ToEPI.ConsumedArguments) 5986 for (unsigned ArgIdx = 0, NumArgs = FromFunctionType->getNumArgs(); 5987 ArgIdx != NumArgs; ++ArgIdx) { 5988 if (FromEPI.ConsumedArguments[ArgIdx] != 5989 ToEPI.ConsumedArguments[ArgIdx]) 5990 return false; 5991 } 5992 return true; 5993} 5994 5995/// mergeObjCGCQualifiers - This routine merges ObjC's GC attribute of 'LHS' and 5996/// 'RHS' attributes and returns the merged version; including for function 5997/// return types. 5998QualType ASTContext::mergeObjCGCQualifiers(QualType LHS, QualType RHS) { 5999 QualType LHSCan = getCanonicalType(LHS), 6000 RHSCan = getCanonicalType(RHS); 6001 // If two types are identical, they are compatible. 6002 if (LHSCan == RHSCan) 6003 return LHS; 6004 if (RHSCan->isFunctionType()) { 6005 if (!LHSCan->isFunctionType()) 6006 return QualType(); 6007 QualType OldReturnType = 6008 cast<FunctionType>(RHSCan.getTypePtr())->getResultType(); 6009 QualType NewReturnType = 6010 cast<FunctionType>(LHSCan.getTypePtr())->getResultType(); 6011 QualType ResReturnType = 6012 mergeObjCGCQualifiers(NewReturnType, OldReturnType); 6013 if (ResReturnType.isNull()) 6014 return QualType(); 6015 if (ResReturnType == NewReturnType || ResReturnType == OldReturnType) { 6016 // id foo(); ... __strong id foo(); or: __strong id foo(); ... id foo(); 6017 // In either case, use OldReturnType to build the new function type. 6018 const FunctionType *F = LHS->getAs<FunctionType>(); 6019 if (const FunctionProtoType *FPT = cast<FunctionProtoType>(F)) { 6020 FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); 6021 EPI.ExtInfo = getFunctionExtInfo(LHS); 6022 QualType ResultType 6023 = getFunctionType(OldReturnType, FPT->arg_type_begin(), 6024 FPT->getNumArgs(), EPI); 6025 return ResultType; 6026 } 6027 } 6028 return QualType(); 6029 } 6030 6031 // If the qualifiers are different, the types can still be merged. 6032 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 6033 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 6034 if (LQuals != RQuals) { 6035 // If any of these qualifiers are different, we have a type mismatch. 6036 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 6037 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 6038 return QualType(); 6039 6040 // Exactly one GC qualifier difference is allowed: __strong is 6041 // okay if the other type has no GC qualifier but is an Objective 6042 // C object pointer (i.e. implicitly strong by default). We fix 6043 // this by pretending that the unqualified type was actually 6044 // qualified __strong. 6045 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 6046 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 6047 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 6048 6049 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 6050 return QualType(); 6051 6052 if (GC_L == Qualifiers::Strong) 6053 return LHS; 6054 if (GC_R == Qualifiers::Strong) 6055 return RHS; 6056 return QualType(); 6057 } 6058 6059 if (LHSCan->isObjCObjectPointerType() && RHSCan->isObjCObjectPointerType()) { 6060 QualType LHSBaseQT = LHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 6061 QualType RHSBaseQT = RHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 6062 QualType ResQT = mergeObjCGCQualifiers(LHSBaseQT, RHSBaseQT); 6063 if (ResQT == LHSBaseQT) 6064 return LHS; 6065 if (ResQT == RHSBaseQT) 6066 return RHS; 6067 } 6068 return QualType(); 6069} 6070 6071//===----------------------------------------------------------------------===// 6072// Integer Predicates 6073//===----------------------------------------------------------------------===// 6074 6075unsigned ASTContext::getIntWidth(QualType T) const { 6076 if (const EnumType *ET = dyn_cast<EnumType>(T)) 6077 T = ET->getDecl()->getIntegerType(); 6078 if (T->isBooleanType()) 6079 return 1; 6080 // For builtin types, just use the standard type sizing method 6081 return (unsigned)getTypeSize(T); 6082} 6083 6084QualType ASTContext::getCorrespondingUnsignedType(QualType T) { 6085 assert(T->hasSignedIntegerRepresentation() && "Unexpected type"); 6086 6087 // Turn <4 x signed int> -> <4 x unsigned int> 6088 if (const VectorType *VTy = T->getAs<VectorType>()) 6089 return getVectorType(getCorrespondingUnsignedType(VTy->getElementType()), 6090 VTy->getNumElements(), VTy->getVectorKind()); 6091 6092 // For enums, we return the unsigned version of the base type. 6093 if (const EnumType *ETy = T->getAs<EnumType>()) 6094 T = ETy->getDecl()->getIntegerType(); 6095 6096 const BuiltinType *BTy = T->getAs<BuiltinType>(); 6097 assert(BTy && "Unexpected signed integer type"); 6098 switch (BTy->getKind()) { 6099 case BuiltinType::Char_S: 6100 case BuiltinType::SChar: 6101 return UnsignedCharTy; 6102 case BuiltinType::Short: 6103 return UnsignedShortTy; 6104 case BuiltinType::Int: 6105 return UnsignedIntTy; 6106 case BuiltinType::Long: 6107 return UnsignedLongTy; 6108 case BuiltinType::LongLong: 6109 return UnsignedLongLongTy; 6110 case BuiltinType::Int128: 6111 return UnsignedInt128Ty; 6112 default: 6113 llvm_unreachable("Unexpected signed integer type"); 6114 } 6115} 6116 6117ASTMutationListener::~ASTMutationListener() { } 6118 6119 6120//===----------------------------------------------------------------------===// 6121// Builtin Type Computation 6122//===----------------------------------------------------------------------===// 6123 6124/// DecodeTypeFromStr - This decodes one type descriptor from Str, advancing the 6125/// pointer over the consumed characters. This returns the resultant type. If 6126/// AllowTypeModifiers is false then modifier like * are not parsed, just basic 6127/// types. This allows "v2i*" to be parsed as a pointer to a v2i instead of 6128/// a vector of "i*". 6129/// 6130/// RequiresICE is filled in on return to indicate whether the value is required 6131/// to be an Integer Constant Expression. 6132static QualType DecodeTypeFromStr(const char *&Str, const ASTContext &Context, 6133 ASTContext::GetBuiltinTypeError &Error, 6134 bool &RequiresICE, 6135 bool AllowTypeModifiers) { 6136 // Modifiers. 6137 int HowLong = 0; 6138 bool Signed = false, Unsigned = false; 6139 RequiresICE = false; 6140 6141 // Read the prefixed modifiers first. 6142 bool Done = false; 6143 while (!Done) { 6144 switch (*Str++) { 6145 default: Done = true; --Str; break; 6146 case 'I': 6147 RequiresICE = true; 6148 break; 6149 case 'S': 6150 assert(!Unsigned && "Can't use both 'S' and 'U' modifiers!"); 6151 assert(!Signed && "Can't use 'S' modifier multiple times!"); 6152 Signed = true; 6153 break; 6154 case 'U': 6155 assert(!Signed && "Can't use both 'S' and 'U' modifiers!"); 6156 assert(!Unsigned && "Can't use 'S' modifier multiple times!"); 6157 Unsigned = true; 6158 break; 6159 case 'L': 6160 assert(HowLong <= 2 && "Can't have LLLL modifier"); 6161 ++HowLong; 6162 break; 6163 } 6164 } 6165 6166 QualType Type; 6167 6168 // Read the base type. 6169 switch (*Str++) { 6170 default: llvm_unreachable("Unknown builtin type letter!"); 6171 case 'v': 6172 assert(HowLong == 0 && !Signed && !Unsigned && 6173 "Bad modifiers used with 'v'!"); 6174 Type = Context.VoidTy; 6175 break; 6176 case 'f': 6177 assert(HowLong == 0 && !Signed && !Unsigned && 6178 "Bad modifiers used with 'f'!"); 6179 Type = Context.FloatTy; 6180 break; 6181 case 'd': 6182 assert(HowLong < 2 && !Signed && !Unsigned && 6183 "Bad modifiers used with 'd'!"); 6184 if (HowLong) 6185 Type = Context.LongDoubleTy; 6186 else 6187 Type = Context.DoubleTy; 6188 break; 6189 case 's': 6190 assert(HowLong == 0 && "Bad modifiers used with 's'!"); 6191 if (Unsigned) 6192 Type = Context.UnsignedShortTy; 6193 else 6194 Type = Context.ShortTy; 6195 break; 6196 case 'i': 6197 if (HowLong == 3) 6198 Type = Unsigned ? Context.UnsignedInt128Ty : Context.Int128Ty; 6199 else if (HowLong == 2) 6200 Type = Unsigned ? Context.UnsignedLongLongTy : Context.LongLongTy; 6201 else if (HowLong == 1) 6202 Type = Unsigned ? Context.UnsignedLongTy : Context.LongTy; 6203 else 6204 Type = Unsigned ? Context.UnsignedIntTy : Context.IntTy; 6205 break; 6206 case 'c': 6207 assert(HowLong == 0 && "Bad modifiers used with 'c'!"); 6208 if (Signed) 6209 Type = Context.SignedCharTy; 6210 else if (Unsigned) 6211 Type = Context.UnsignedCharTy; 6212 else 6213 Type = Context.CharTy; 6214 break; 6215 case 'b': // boolean 6216 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'b'!"); 6217 Type = Context.BoolTy; 6218 break; 6219 case 'z': // size_t. 6220 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'z'!"); 6221 Type = Context.getSizeType(); 6222 break; 6223 case 'F': 6224 Type = Context.getCFConstantStringType(); 6225 break; 6226 case 'G': 6227 Type = Context.getObjCIdType(); 6228 break; 6229 case 'H': 6230 Type = Context.getObjCSelType(); 6231 break; 6232 case 'a': 6233 Type = Context.getBuiltinVaListType(); 6234 assert(!Type.isNull() && "builtin va list type not initialized!"); 6235 break; 6236 case 'A': 6237 // This is a "reference" to a va_list; however, what exactly 6238 // this means depends on how va_list is defined. There are two 6239 // different kinds of va_list: ones passed by value, and ones 6240 // passed by reference. An example of a by-value va_list is 6241 // x86, where va_list is a char*. An example of by-ref va_list 6242 // is x86-64, where va_list is a __va_list_tag[1]. For x86, 6243 // we want this argument to be a char*&; for x86-64, we want 6244 // it to be a __va_list_tag*. 6245 Type = Context.getBuiltinVaListType(); 6246 assert(!Type.isNull() && "builtin va list type not initialized!"); 6247 if (Type->isArrayType()) 6248 Type = Context.getArrayDecayedType(Type); 6249 else 6250 Type = Context.getLValueReferenceType(Type); 6251 break; 6252 case 'V': { 6253 char *End; 6254 unsigned NumElements = strtoul(Str, &End, 10); 6255 assert(End != Str && "Missing vector size"); 6256 Str = End; 6257 6258 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, 6259 RequiresICE, false); 6260 assert(!RequiresICE && "Can't require vector ICE"); 6261 6262 // TODO: No way to make AltiVec vectors in builtins yet. 6263 Type = Context.getVectorType(ElementType, NumElements, 6264 VectorType::GenericVector); 6265 break; 6266 } 6267 case 'X': { 6268 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, RequiresICE, 6269 false); 6270 assert(!RequiresICE && "Can't require complex ICE"); 6271 Type = Context.getComplexType(ElementType); 6272 break; 6273 } 6274 case 'Y' : { 6275 Type = Context.getPointerDiffType(); 6276 break; 6277 } 6278 case 'P': 6279 Type = Context.getFILEType(); 6280 if (Type.isNull()) { 6281 Error = ASTContext::GE_Missing_stdio; 6282 return QualType(); 6283 } 6284 break; 6285 case 'J': 6286 if (Signed) 6287 Type = Context.getsigjmp_bufType(); 6288 else 6289 Type = Context.getjmp_bufType(); 6290 6291 if (Type.isNull()) { 6292 Error = ASTContext::GE_Missing_setjmp; 6293 return QualType(); 6294 } 6295 break; 6296 } 6297 6298 // If there are modifiers and if we're allowed to parse them, go for it. 6299 Done = !AllowTypeModifiers; 6300 while (!Done) { 6301 switch (char c = *Str++) { 6302 default: Done = true; --Str; break; 6303 case '*': 6304 case '&': { 6305 // Both pointers and references can have their pointee types 6306 // qualified with an address space. 6307 char *End; 6308 unsigned AddrSpace = strtoul(Str, &End, 10); 6309 if (End != Str && AddrSpace != 0) { 6310 Type = Context.getAddrSpaceQualType(Type, AddrSpace); 6311 Str = End; 6312 } 6313 if (c == '*') 6314 Type = Context.getPointerType(Type); 6315 else 6316 Type = Context.getLValueReferenceType(Type); 6317 break; 6318 } 6319 // FIXME: There's no way to have a built-in with an rvalue ref arg. 6320 case 'C': 6321 Type = Type.withConst(); 6322 break; 6323 case 'D': 6324 Type = Context.getVolatileType(Type); 6325 break; 6326 } 6327 } 6328 6329 assert((!RequiresICE || Type->isIntegralOrEnumerationType()) && 6330 "Integer constant 'I' type must be an integer"); 6331 6332 return Type; 6333} 6334 6335/// GetBuiltinType - Return the type for the specified builtin. 6336QualType ASTContext::GetBuiltinType(unsigned Id, 6337 GetBuiltinTypeError &Error, 6338 unsigned *IntegerConstantArgs) const { 6339 const char *TypeStr = BuiltinInfo.GetTypeString(Id); 6340 6341 SmallVector<QualType, 8> ArgTypes; 6342 6343 bool RequiresICE = false; 6344 Error = GE_None; 6345 QualType ResType = DecodeTypeFromStr(TypeStr, *this, Error, 6346 RequiresICE, true); 6347 if (Error != GE_None) 6348 return QualType(); 6349 6350 assert(!RequiresICE && "Result of intrinsic cannot be required to be an ICE"); 6351 6352 while (TypeStr[0] && TypeStr[0] != '.') { 6353 QualType Ty = DecodeTypeFromStr(TypeStr, *this, Error, RequiresICE, true); 6354 if (Error != GE_None) 6355 return QualType(); 6356 6357 // If this argument is required to be an IntegerConstantExpression and the 6358 // caller cares, fill in the bitmask we return. 6359 if (RequiresICE && IntegerConstantArgs) 6360 *IntegerConstantArgs |= 1 << ArgTypes.size(); 6361 6362 // Do array -> pointer decay. The builtin should use the decayed type. 6363 if (Ty->isArrayType()) 6364 Ty = getArrayDecayedType(Ty); 6365 6366 ArgTypes.push_back(Ty); 6367 } 6368 6369 assert((TypeStr[0] != '.' || TypeStr[1] == 0) && 6370 "'.' should only occur at end of builtin type list!"); 6371 6372 FunctionType::ExtInfo EI; 6373 if (BuiltinInfo.isNoReturn(Id)) EI = EI.withNoReturn(true); 6374 6375 bool Variadic = (TypeStr[0] == '.'); 6376 6377 // We really shouldn't be making a no-proto type here, especially in C++. 6378 if (ArgTypes.empty() && Variadic) 6379 return getFunctionNoProtoType(ResType, EI); 6380 6381 FunctionProtoType::ExtProtoInfo EPI; 6382 EPI.ExtInfo = EI; 6383 EPI.Variadic = Variadic; 6384 6385 return getFunctionType(ResType, ArgTypes.data(), ArgTypes.size(), EPI); 6386} 6387 6388GVALinkage ASTContext::GetGVALinkageForFunction(const FunctionDecl *FD) { 6389 GVALinkage External = GVA_StrongExternal; 6390 6391 Linkage L = FD->getLinkage(); 6392 switch (L) { 6393 case NoLinkage: 6394 case InternalLinkage: 6395 case UniqueExternalLinkage: 6396 return GVA_Internal; 6397 6398 case ExternalLinkage: 6399 switch (FD->getTemplateSpecializationKind()) { 6400 case TSK_Undeclared: 6401 case TSK_ExplicitSpecialization: 6402 External = GVA_StrongExternal; 6403 break; 6404 6405 case TSK_ExplicitInstantiationDefinition: 6406 return GVA_ExplicitTemplateInstantiation; 6407 6408 case TSK_ExplicitInstantiationDeclaration: 6409 case TSK_ImplicitInstantiation: 6410 External = GVA_TemplateInstantiation; 6411 break; 6412 } 6413 } 6414 6415 if (!FD->isInlined()) 6416 return External; 6417 6418 if (!getLangOptions().CPlusPlus || FD->hasAttr<GNUInlineAttr>()) { 6419 // GNU or C99 inline semantics. Determine whether this symbol should be 6420 // externally visible. 6421 if (FD->isInlineDefinitionExternallyVisible()) 6422 return External; 6423 6424 // C99 inline semantics, where the symbol is not externally visible. 6425 return GVA_C99Inline; 6426 } 6427 6428 // C++0x [temp.explicit]p9: 6429 // [ Note: The intent is that an inline function that is the subject of 6430 // an explicit instantiation declaration will still be implicitly 6431 // instantiated when used so that the body can be considered for 6432 // inlining, but that no out-of-line copy of the inline function would be 6433 // generated in the translation unit. -- end note ] 6434 if (FD->getTemplateSpecializationKind() 6435 == TSK_ExplicitInstantiationDeclaration) 6436 return GVA_C99Inline; 6437 6438 return GVA_CXXInline; 6439} 6440 6441GVALinkage ASTContext::GetGVALinkageForVariable(const VarDecl *VD) { 6442 // If this is a static data member, compute the kind of template 6443 // specialization. Otherwise, this variable is not part of a 6444 // template. 6445 TemplateSpecializationKind TSK = TSK_Undeclared; 6446 if (VD->isStaticDataMember()) 6447 TSK = VD->getTemplateSpecializationKind(); 6448 6449 Linkage L = VD->getLinkage(); 6450 if (L == ExternalLinkage && getLangOptions().CPlusPlus && 6451 VD->getType()->getLinkage() == UniqueExternalLinkage) 6452 L = UniqueExternalLinkage; 6453 6454 switch (L) { 6455 case NoLinkage: 6456 case InternalLinkage: 6457 case UniqueExternalLinkage: 6458 return GVA_Internal; 6459 6460 case ExternalLinkage: 6461 switch (TSK) { 6462 case TSK_Undeclared: 6463 case TSK_ExplicitSpecialization: 6464 return GVA_StrongExternal; 6465 6466 case TSK_ExplicitInstantiationDeclaration: 6467 llvm_unreachable("Variable should not be instantiated"); 6468 // Fall through to treat this like any other instantiation. 6469 6470 case TSK_ExplicitInstantiationDefinition: 6471 return GVA_ExplicitTemplateInstantiation; 6472 6473 case TSK_ImplicitInstantiation: 6474 return GVA_TemplateInstantiation; 6475 } 6476 } 6477 6478 return GVA_StrongExternal; 6479} 6480 6481bool ASTContext::DeclMustBeEmitted(const Decl *D) { 6482 if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { 6483 if (!VD->isFileVarDecl()) 6484 return false; 6485 } else if (!isa<FunctionDecl>(D)) 6486 return false; 6487 6488 // Weak references don't produce any output by themselves. 6489 if (D->hasAttr<WeakRefAttr>()) 6490 return false; 6491 6492 // Aliases and used decls are required. 6493 if (D->hasAttr<AliasAttr>() || D->hasAttr<UsedAttr>()) 6494 return true; 6495 6496 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 6497 // Forward declarations aren't required. 6498 if (!FD->doesThisDeclarationHaveABody()) 6499 return FD->doesDeclarationForceExternallyVisibleDefinition(); 6500 6501 // Constructors and destructors are required. 6502 if (FD->hasAttr<ConstructorAttr>() || FD->hasAttr<DestructorAttr>()) 6503 return true; 6504 6505 // The key function for a class is required. 6506 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { 6507 const CXXRecordDecl *RD = MD->getParent(); 6508 if (MD->isOutOfLine() && RD->isDynamicClass()) { 6509 const CXXMethodDecl *KeyFunc = getKeyFunction(RD); 6510 if (KeyFunc && KeyFunc->getCanonicalDecl() == MD->getCanonicalDecl()) 6511 return true; 6512 } 6513 } 6514 6515 GVALinkage Linkage = GetGVALinkageForFunction(FD); 6516 6517 // static, static inline, always_inline, and extern inline functions can 6518 // always be deferred. Normal inline functions can be deferred in C99/C++. 6519 // Implicit template instantiations can also be deferred in C++. 6520 if (Linkage == GVA_Internal || Linkage == GVA_C99Inline || 6521 Linkage == GVA_CXXInline || Linkage == GVA_TemplateInstantiation) 6522 return false; 6523 return true; 6524 } 6525 6526 const VarDecl *VD = cast<VarDecl>(D); 6527 assert(VD->isFileVarDecl() && "Expected file scoped var"); 6528 6529 if (VD->isThisDeclarationADefinition() == VarDecl::DeclarationOnly) 6530 return false; 6531 6532 // Structs that have non-trivial constructors or destructors are required. 6533 6534 // FIXME: Handle references. 6535 // FIXME: Be more selective about which constructors we care about. 6536 if (const RecordType *RT = VD->getType()->getAs<RecordType>()) { 6537 if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(RT->getDecl())) { 6538 if (RD->hasDefinition() && !(RD->hasTrivialDefaultConstructor() && 6539 RD->hasTrivialCopyConstructor() && 6540 RD->hasTrivialMoveConstructor() && 6541 RD->hasTrivialDestructor())) 6542 return true; 6543 } 6544 } 6545 6546 GVALinkage L = GetGVALinkageForVariable(VD); 6547 if (L == GVA_Internal || L == GVA_TemplateInstantiation) { 6548 if (!(VD->getInit() && VD->getInit()->HasSideEffects(*this))) 6549 return false; 6550 } 6551 6552 return true; 6553} 6554 6555CallingConv ASTContext::getDefaultMethodCallConv() { 6556 // Pass through to the C++ ABI object 6557 return ABI->getDefaultMethodCallConv(); 6558} 6559 6560bool ASTContext::isNearlyEmpty(const CXXRecordDecl *RD) const { 6561 // Pass through to the C++ ABI object 6562 return ABI->isNearlyEmpty(RD); 6563} 6564 6565MangleContext *ASTContext::createMangleContext() { 6566 switch (Target->getCXXABI()) { 6567 case CXXABI_ARM: 6568 case CXXABI_Itanium: 6569 return createItaniumMangleContext(*this, getDiagnostics()); 6570 case CXXABI_Microsoft: 6571 return createMicrosoftMangleContext(*this, getDiagnostics()); 6572 } 6573 llvm_unreachable("Unsupported ABI"); 6574} 6575 6576CXXABI::~CXXABI() {} 6577 6578size_t ASTContext::getSideTableAllocatedMemory() const { 6579 return ASTRecordLayouts.getMemorySize() 6580 + llvm::capacity_in_bytes(ObjCLayouts) 6581 + llvm::capacity_in_bytes(KeyFunctions) 6582 + llvm::capacity_in_bytes(ObjCImpls) 6583 + llvm::capacity_in_bytes(BlockVarCopyInits) 6584 + llvm::capacity_in_bytes(DeclAttrs) 6585 + llvm::capacity_in_bytes(InstantiatedFromStaticDataMember) 6586 + llvm::capacity_in_bytes(InstantiatedFromUsingDecl) 6587 + llvm::capacity_in_bytes(InstantiatedFromUsingShadowDecl) 6588 + llvm::capacity_in_bytes(InstantiatedFromUnnamedFieldDecl) 6589 + llvm::capacity_in_bytes(OverriddenMethods) 6590 + llvm::capacity_in_bytes(Types) 6591 + llvm::capacity_in_bytes(VariableArrayTypes) 6592 + llvm::capacity_in_bytes(ClassScopeSpecializationPattern); 6593} 6594 6595void ASTContext::setParameterIndex(const ParmVarDecl *D, unsigned int index) { 6596 ParamIndices[D] = index; 6597} 6598 6599unsigned ASTContext::getParameterIndex(const ParmVarDecl *D) const { 6600 ParameterIndexTable::const_iterator I = ParamIndices.find(D); 6601 assert(I != ParamIndices.end() && 6602 "ParmIndices lacks entry set by ParmVarDecl"); 6603 return I->second; 6604} 6605