ASTContext.cpp revision d3d77cd138f8e830f6547b6f83fcd5721ccf5f5d
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 "CXXABI.h" 34 35using namespace clang; 36 37unsigned ASTContext::NumImplicitDefaultConstructors; 38unsigned ASTContext::NumImplicitDefaultConstructorsDeclared; 39unsigned ASTContext::NumImplicitCopyConstructors; 40unsigned ASTContext::NumImplicitCopyConstructorsDeclared; 41unsigned ASTContext::NumImplicitCopyAssignmentOperators; 42unsigned ASTContext::NumImplicitCopyAssignmentOperatorsDeclared; 43unsigned ASTContext::NumImplicitDestructors; 44unsigned ASTContext::NumImplicitDestructorsDeclared; 45 46enum FloatingRank { 47 FloatRank, DoubleRank, LongDoubleRank 48}; 49 50void 51ASTContext::CanonicalTemplateTemplateParm::Profile(llvm::FoldingSetNodeID &ID, 52 TemplateTemplateParmDecl *Parm) { 53 ID.AddInteger(Parm->getDepth()); 54 ID.AddInteger(Parm->getPosition()); 55 ID.AddBoolean(Parm->isParameterPack()); 56 57 TemplateParameterList *Params = Parm->getTemplateParameters(); 58 ID.AddInteger(Params->size()); 59 for (TemplateParameterList::const_iterator P = Params->begin(), 60 PEnd = Params->end(); 61 P != PEnd; ++P) { 62 if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*P)) { 63 ID.AddInteger(0); 64 ID.AddBoolean(TTP->isParameterPack()); 65 continue; 66 } 67 68 if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(*P)) { 69 ID.AddInteger(1); 70 ID.AddBoolean(NTTP->isParameterPack()); 71 ID.AddPointer(NTTP->getType().getAsOpaquePtr()); 72 if (NTTP->isExpandedParameterPack()) { 73 ID.AddBoolean(true); 74 ID.AddInteger(NTTP->getNumExpansionTypes()); 75 for (unsigned I = 0, N = NTTP->getNumExpansionTypes(); I != N; ++I) 76 ID.AddPointer(NTTP->getExpansionType(I).getAsOpaquePtr()); 77 } else 78 ID.AddBoolean(false); 79 continue; 80 } 81 82 TemplateTemplateParmDecl *TTP = cast<TemplateTemplateParmDecl>(*P); 83 ID.AddInteger(2); 84 Profile(ID, TTP); 85 } 86} 87 88TemplateTemplateParmDecl * 89ASTContext::getCanonicalTemplateTemplateParmDecl( 90 TemplateTemplateParmDecl *TTP) const { 91 // Check if we already have a canonical template template parameter. 92 llvm::FoldingSetNodeID ID; 93 CanonicalTemplateTemplateParm::Profile(ID, TTP); 94 void *InsertPos = 0; 95 CanonicalTemplateTemplateParm *Canonical 96 = CanonTemplateTemplateParms.FindNodeOrInsertPos(ID, InsertPos); 97 if (Canonical) 98 return Canonical->getParam(); 99 100 // Build a canonical template parameter list. 101 TemplateParameterList *Params = TTP->getTemplateParameters(); 102 llvm::SmallVector<NamedDecl *, 4> CanonParams; 103 CanonParams.reserve(Params->size()); 104 for (TemplateParameterList::const_iterator P = Params->begin(), 105 PEnd = Params->end(); 106 P != PEnd; ++P) { 107 if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*P)) 108 CanonParams.push_back( 109 TemplateTypeParmDecl::Create(*this, getTranslationUnitDecl(), 110 SourceLocation(), 111 SourceLocation(), 112 TTP->getDepth(), 113 TTP->getIndex(), 0, false, 114 TTP->isParameterPack())); 115 else if (NonTypeTemplateParmDecl *NTTP 116 = dyn_cast<NonTypeTemplateParmDecl>(*P)) { 117 QualType T = getCanonicalType(NTTP->getType()); 118 TypeSourceInfo *TInfo = getTrivialTypeSourceInfo(T); 119 NonTypeTemplateParmDecl *Param; 120 if (NTTP->isExpandedParameterPack()) { 121 llvm::SmallVector<QualType, 2> ExpandedTypes; 122 llvm::SmallVector<TypeSourceInfo *, 2> ExpandedTInfos; 123 for (unsigned I = 0, N = NTTP->getNumExpansionTypes(); I != N; ++I) { 124 ExpandedTypes.push_back(getCanonicalType(NTTP->getExpansionType(I))); 125 ExpandedTInfos.push_back( 126 getTrivialTypeSourceInfo(ExpandedTypes.back())); 127 } 128 129 Param = NonTypeTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 130 SourceLocation(), 131 SourceLocation(), 132 NTTP->getDepth(), 133 NTTP->getPosition(), 0, 134 T, 135 TInfo, 136 ExpandedTypes.data(), 137 ExpandedTypes.size(), 138 ExpandedTInfos.data()); 139 } else { 140 Param = NonTypeTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 141 SourceLocation(), 142 SourceLocation(), 143 NTTP->getDepth(), 144 NTTP->getPosition(), 0, 145 T, 146 NTTP->isParameterPack(), 147 TInfo); 148 } 149 CanonParams.push_back(Param); 150 151 } else 152 CanonParams.push_back(getCanonicalTemplateTemplateParmDecl( 153 cast<TemplateTemplateParmDecl>(*P))); 154 } 155 156 TemplateTemplateParmDecl *CanonTTP 157 = TemplateTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 158 SourceLocation(), TTP->getDepth(), 159 TTP->getPosition(), 160 TTP->isParameterPack(), 161 0, 162 TemplateParameterList::Create(*this, SourceLocation(), 163 SourceLocation(), 164 CanonParams.data(), 165 CanonParams.size(), 166 SourceLocation())); 167 168 // Get the new insert position for the node we care about. 169 Canonical = CanonTemplateTemplateParms.FindNodeOrInsertPos(ID, InsertPos); 170 assert(Canonical == 0 && "Shouldn't be in the map!"); 171 (void)Canonical; 172 173 // Create the canonical template template parameter entry. 174 Canonical = new (*this) CanonicalTemplateTemplateParm(CanonTTP); 175 CanonTemplateTemplateParms.InsertNode(Canonical, InsertPos); 176 return CanonTTP; 177} 178 179CXXABI *ASTContext::createCXXABI(const TargetInfo &T) { 180 if (!LangOpts.CPlusPlus) return 0; 181 182 switch (T.getCXXABI()) { 183 case CXXABI_ARM: 184 return CreateARMCXXABI(*this); 185 case CXXABI_Itanium: 186 return CreateItaniumCXXABI(*this); 187 case CXXABI_Microsoft: 188 return CreateMicrosoftCXXABI(*this); 189 } 190 return 0; 191} 192 193static const LangAS::Map &getAddressSpaceMap(const TargetInfo &T, 194 const LangOptions &LOpts) { 195 if (LOpts.FakeAddressSpaceMap) { 196 // The fake address space map must have a distinct entry for each 197 // language-specific address space. 198 static const unsigned FakeAddrSpaceMap[] = { 199 1, // opencl_global 200 2, // opencl_local 201 3 // opencl_constant 202 }; 203 return FakeAddrSpaceMap; 204 } else { 205 return T.getAddressSpaceMap(); 206 } 207} 208 209ASTContext::ASTContext(const LangOptions& LOpts, SourceManager &SM, 210 const TargetInfo &t, 211 IdentifierTable &idents, SelectorTable &sels, 212 Builtin::Context &builtins, 213 unsigned size_reserve) : 214 FunctionProtoTypes(this_()), 215 TemplateSpecializationTypes(this_()), 216 DependentTemplateSpecializationTypes(this_()), 217 GlobalNestedNameSpecifier(0), IsInt128Installed(false), 218 CFConstantStringTypeDecl(0), NSConstantStringTypeDecl(0), 219 ObjCFastEnumerationStateTypeDecl(0), FILEDecl(0), jmp_bufDecl(0), 220 sigjmp_bufDecl(0), BlockDescriptorType(0), BlockDescriptorExtendedType(0), 221 cudaConfigureCallDecl(0), 222 NullTypeSourceInfo(QualType()), 223 SourceMgr(SM), LangOpts(LOpts), ABI(createCXXABI(t)), 224 AddrSpaceMap(getAddressSpaceMap(t, LOpts)), Target(t), 225 Idents(idents), Selectors(sels), 226 BuiltinInfo(builtins), 227 DeclarationNames(*this), 228 ExternalSource(0), Listener(0), PrintingPolicy(LOpts), 229 LastSDM(0, 0), 230 UniqueBlockByRefTypeID(0) { 231 ObjCIdRedefinitionType = QualType(); 232 ObjCClassRedefinitionType = QualType(); 233 ObjCSelRedefinitionType = QualType(); 234 if (size_reserve > 0) Types.reserve(size_reserve); 235 TUDecl = TranslationUnitDecl::Create(*this); 236 InitBuiltinTypes(); 237} 238 239ASTContext::~ASTContext() { 240 // Release the DenseMaps associated with DeclContext objects. 241 // FIXME: Is this the ideal solution? 242 ReleaseDeclContextMaps(); 243 244 // Call all of the deallocation functions. 245 for (unsigned I = 0, N = Deallocations.size(); I != N; ++I) 246 Deallocations[I].first(Deallocations[I].second); 247 248 // Release all of the memory associated with overridden C++ methods. 249 for (llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::iterator 250 OM = OverriddenMethods.begin(), OMEnd = OverriddenMethods.end(); 251 OM != OMEnd; ++OM) 252 OM->second.Destroy(); 253 254 // ASTRecordLayout objects in ASTRecordLayouts must always be destroyed 255 // because they can contain DenseMaps. 256 for (llvm::DenseMap<const ObjCContainerDecl*, 257 const ASTRecordLayout*>::iterator 258 I = ObjCLayouts.begin(), E = ObjCLayouts.end(); I != E; ) 259 // Increment in loop to prevent using deallocated memory. 260 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 261 R->Destroy(*this); 262 263 for (llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*>::iterator 264 I = ASTRecordLayouts.begin(), E = ASTRecordLayouts.end(); I != E; ) { 265 // Increment in loop to prevent using deallocated memory. 266 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 267 R->Destroy(*this); 268 } 269 270 for (llvm::DenseMap<const Decl*, AttrVec*>::iterator A = DeclAttrs.begin(), 271 AEnd = DeclAttrs.end(); 272 A != AEnd; ++A) 273 A->second->~AttrVec(); 274} 275 276void ASTContext::AddDeallocation(void (*Callback)(void*), void *Data) { 277 Deallocations.push_back(std::make_pair(Callback, Data)); 278} 279 280void 281ASTContext::setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source) { 282 ExternalSource.reset(Source.take()); 283} 284 285void ASTContext::PrintStats() const { 286 fprintf(stderr, "*** AST Context Stats:\n"); 287 fprintf(stderr, " %d types total.\n", (int)Types.size()); 288 289 unsigned counts[] = { 290#define TYPE(Name, Parent) 0, 291#define ABSTRACT_TYPE(Name, Parent) 292#include "clang/AST/TypeNodes.def" 293 0 // Extra 294 }; 295 296 for (unsigned i = 0, e = Types.size(); i != e; ++i) { 297 Type *T = Types[i]; 298 counts[(unsigned)T->getTypeClass()]++; 299 } 300 301 unsigned Idx = 0; 302 unsigned TotalBytes = 0; 303#define TYPE(Name, Parent) \ 304 if (counts[Idx]) \ 305 fprintf(stderr, " %d %s types\n", (int)counts[Idx], #Name); \ 306 TotalBytes += counts[Idx] * sizeof(Name##Type); \ 307 ++Idx; 308#define ABSTRACT_TYPE(Name, Parent) 309#include "clang/AST/TypeNodes.def" 310 311 fprintf(stderr, "Total bytes = %d\n", int(TotalBytes)); 312 313 // Implicit special member functions. 314 fprintf(stderr, " %u/%u implicit default constructors created\n", 315 NumImplicitDefaultConstructorsDeclared, 316 NumImplicitDefaultConstructors); 317 fprintf(stderr, " %u/%u implicit copy constructors created\n", 318 NumImplicitCopyConstructorsDeclared, 319 NumImplicitCopyConstructors); 320 fprintf(stderr, " %u/%u implicit copy assignment operators created\n", 321 NumImplicitCopyAssignmentOperatorsDeclared, 322 NumImplicitCopyAssignmentOperators); 323 fprintf(stderr, " %u/%u implicit destructors created\n", 324 NumImplicitDestructorsDeclared, NumImplicitDestructors); 325 326 if (ExternalSource.get()) { 327 fprintf(stderr, "\n"); 328 ExternalSource->PrintStats(); 329 } 330 331 BumpAlloc.PrintStats(); 332} 333 334 335void ASTContext::InitBuiltinType(CanQualType &R, BuiltinType::Kind K) { 336 BuiltinType *Ty = new (*this, TypeAlignment) BuiltinType(K); 337 R = CanQualType::CreateUnsafe(QualType(Ty, 0)); 338 Types.push_back(Ty); 339} 340 341void ASTContext::InitBuiltinTypes() { 342 assert(VoidTy.isNull() && "Context reinitialized?"); 343 344 // C99 6.2.5p19. 345 InitBuiltinType(VoidTy, BuiltinType::Void); 346 347 // C99 6.2.5p2. 348 InitBuiltinType(BoolTy, BuiltinType::Bool); 349 // C99 6.2.5p3. 350 if (LangOpts.CharIsSigned) 351 InitBuiltinType(CharTy, BuiltinType::Char_S); 352 else 353 InitBuiltinType(CharTy, BuiltinType::Char_U); 354 // C99 6.2.5p4. 355 InitBuiltinType(SignedCharTy, BuiltinType::SChar); 356 InitBuiltinType(ShortTy, BuiltinType::Short); 357 InitBuiltinType(IntTy, BuiltinType::Int); 358 InitBuiltinType(LongTy, BuiltinType::Long); 359 InitBuiltinType(LongLongTy, BuiltinType::LongLong); 360 361 // C99 6.2.5p6. 362 InitBuiltinType(UnsignedCharTy, BuiltinType::UChar); 363 InitBuiltinType(UnsignedShortTy, BuiltinType::UShort); 364 InitBuiltinType(UnsignedIntTy, BuiltinType::UInt); 365 InitBuiltinType(UnsignedLongTy, BuiltinType::ULong); 366 InitBuiltinType(UnsignedLongLongTy, BuiltinType::ULongLong); 367 368 // C99 6.2.5p10. 369 InitBuiltinType(FloatTy, BuiltinType::Float); 370 InitBuiltinType(DoubleTy, BuiltinType::Double); 371 InitBuiltinType(LongDoubleTy, BuiltinType::LongDouble); 372 373 // GNU extension, 128-bit integers. 374 InitBuiltinType(Int128Ty, BuiltinType::Int128); 375 InitBuiltinType(UnsignedInt128Ty, BuiltinType::UInt128); 376 377 if (LangOpts.CPlusPlus) { // C++ 3.9.1p5 378 if (TargetInfo::isTypeSigned(Target.getWCharType())) 379 InitBuiltinType(WCharTy, BuiltinType::WChar_S); 380 else // -fshort-wchar makes wchar_t be unsigned. 381 InitBuiltinType(WCharTy, BuiltinType::WChar_U); 382 } else // C99 383 WCharTy = getFromTargetType(Target.getWCharType()); 384 385 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 386 InitBuiltinType(Char16Ty, BuiltinType::Char16); 387 else // C99 388 Char16Ty = getFromTargetType(Target.getChar16Type()); 389 390 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 391 InitBuiltinType(Char32Ty, BuiltinType::Char32); 392 else // C99 393 Char32Ty = getFromTargetType(Target.getChar32Type()); 394 395 // Placeholder type for type-dependent expressions whose type is 396 // completely unknown. No code should ever check a type against 397 // DependentTy and users should never see it; however, it is here to 398 // help diagnose failures to properly check for type-dependent 399 // expressions. 400 InitBuiltinType(DependentTy, BuiltinType::Dependent); 401 402 // Placeholder type for functions. 403 InitBuiltinType(OverloadTy, BuiltinType::Overload); 404 405 // Placeholder type for bound members. 406 InitBuiltinType(BoundMemberTy, BuiltinType::BoundMember); 407 408 // "any" type; useful for debugger-like clients. 409 InitBuiltinType(UnknownAnyTy, BuiltinType::UnknownAny); 410 411 // C99 6.2.5p11. 412 FloatComplexTy = getComplexType(FloatTy); 413 DoubleComplexTy = getComplexType(DoubleTy); 414 LongDoubleComplexTy = getComplexType(LongDoubleTy); 415 416 BuiltinVaListType = QualType(); 417 418 // "Builtin" typedefs set by Sema::ActOnTranslationUnitScope(). 419 ObjCIdTypedefType = QualType(); 420 ObjCClassTypedefType = QualType(); 421 ObjCSelTypedefType = QualType(); 422 423 // Builtin types for 'id', 'Class', and 'SEL'. 424 InitBuiltinType(ObjCBuiltinIdTy, BuiltinType::ObjCId); 425 InitBuiltinType(ObjCBuiltinClassTy, BuiltinType::ObjCClass); 426 InitBuiltinType(ObjCBuiltinSelTy, BuiltinType::ObjCSel); 427 428 ObjCConstantStringType = QualType(); 429 430 // void * type 431 VoidPtrTy = getPointerType(VoidTy); 432 433 // nullptr type (C++0x 2.14.7) 434 InitBuiltinType(NullPtrTy, BuiltinType::NullPtr); 435} 436 437Diagnostic &ASTContext::getDiagnostics() const { 438 return SourceMgr.getDiagnostics(); 439} 440 441AttrVec& ASTContext::getDeclAttrs(const Decl *D) { 442 AttrVec *&Result = DeclAttrs[D]; 443 if (!Result) { 444 void *Mem = Allocate(sizeof(AttrVec)); 445 Result = new (Mem) AttrVec; 446 } 447 448 return *Result; 449} 450 451/// \brief Erase the attributes corresponding to the given declaration. 452void ASTContext::eraseDeclAttrs(const Decl *D) { 453 llvm::DenseMap<const Decl*, AttrVec*>::iterator Pos = DeclAttrs.find(D); 454 if (Pos != DeclAttrs.end()) { 455 Pos->second->~AttrVec(); 456 DeclAttrs.erase(Pos); 457 } 458} 459 460MemberSpecializationInfo * 461ASTContext::getInstantiatedFromStaticDataMember(const VarDecl *Var) { 462 assert(Var->isStaticDataMember() && "Not a static data member"); 463 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *>::iterator Pos 464 = InstantiatedFromStaticDataMember.find(Var); 465 if (Pos == InstantiatedFromStaticDataMember.end()) 466 return 0; 467 468 return Pos->second; 469} 470 471void 472ASTContext::setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 473 TemplateSpecializationKind TSK, 474 SourceLocation PointOfInstantiation) { 475 assert(Inst->isStaticDataMember() && "Not a static data member"); 476 assert(Tmpl->isStaticDataMember() && "Not a static data member"); 477 assert(!InstantiatedFromStaticDataMember[Inst] && 478 "Already noted what static data member was instantiated from"); 479 InstantiatedFromStaticDataMember[Inst] 480 = new (*this) MemberSpecializationInfo(Tmpl, TSK, PointOfInstantiation); 481} 482 483NamedDecl * 484ASTContext::getInstantiatedFromUsingDecl(UsingDecl *UUD) { 485 llvm::DenseMap<UsingDecl *, NamedDecl *>::const_iterator Pos 486 = InstantiatedFromUsingDecl.find(UUD); 487 if (Pos == InstantiatedFromUsingDecl.end()) 488 return 0; 489 490 return Pos->second; 491} 492 493void 494ASTContext::setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern) { 495 assert((isa<UsingDecl>(Pattern) || 496 isa<UnresolvedUsingValueDecl>(Pattern) || 497 isa<UnresolvedUsingTypenameDecl>(Pattern)) && 498 "pattern decl is not a using decl"); 499 assert(!InstantiatedFromUsingDecl[Inst] && "pattern already exists"); 500 InstantiatedFromUsingDecl[Inst] = Pattern; 501} 502 503UsingShadowDecl * 504ASTContext::getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst) { 505 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*>::const_iterator Pos 506 = InstantiatedFromUsingShadowDecl.find(Inst); 507 if (Pos == InstantiatedFromUsingShadowDecl.end()) 508 return 0; 509 510 return Pos->second; 511} 512 513void 514ASTContext::setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 515 UsingShadowDecl *Pattern) { 516 assert(!InstantiatedFromUsingShadowDecl[Inst] && "pattern already exists"); 517 InstantiatedFromUsingShadowDecl[Inst] = Pattern; 518} 519 520FieldDecl *ASTContext::getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field) { 521 llvm::DenseMap<FieldDecl *, FieldDecl *>::iterator Pos 522 = InstantiatedFromUnnamedFieldDecl.find(Field); 523 if (Pos == InstantiatedFromUnnamedFieldDecl.end()) 524 return 0; 525 526 return Pos->second; 527} 528 529void ASTContext::setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, 530 FieldDecl *Tmpl) { 531 assert(!Inst->getDeclName() && "Instantiated field decl is not unnamed"); 532 assert(!Tmpl->getDeclName() && "Template field decl is not unnamed"); 533 assert(!InstantiatedFromUnnamedFieldDecl[Inst] && 534 "Already noted what unnamed field was instantiated from"); 535 536 InstantiatedFromUnnamedFieldDecl[Inst] = Tmpl; 537} 538 539bool ASTContext::ZeroBitfieldFollowsNonBitfield(const FieldDecl *FD, 540 const FieldDecl *LastFD) const { 541 return (FD->isBitField() && LastFD && !LastFD->isBitField() && 542 FD->getBitWidth()-> EvaluateAsInt(*this).getZExtValue() == 0); 543 544} 545 546ASTContext::overridden_cxx_method_iterator 547ASTContext::overridden_methods_begin(const CXXMethodDecl *Method) const { 548 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 549 = OverriddenMethods.find(Method); 550 if (Pos == OverriddenMethods.end()) 551 return 0; 552 553 return Pos->second.begin(); 554} 555 556ASTContext::overridden_cxx_method_iterator 557ASTContext::overridden_methods_end(const CXXMethodDecl *Method) const { 558 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 559 = OverriddenMethods.find(Method); 560 if (Pos == OverriddenMethods.end()) 561 return 0; 562 563 return Pos->second.end(); 564} 565 566unsigned 567ASTContext::overridden_methods_size(const CXXMethodDecl *Method) const { 568 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 569 = OverriddenMethods.find(Method); 570 if (Pos == OverriddenMethods.end()) 571 return 0; 572 573 return Pos->second.size(); 574} 575 576void ASTContext::addOverriddenMethod(const CXXMethodDecl *Method, 577 const CXXMethodDecl *Overridden) { 578 OverriddenMethods[Method].push_back(Overridden); 579} 580 581//===----------------------------------------------------------------------===// 582// Type Sizing and Analysis 583//===----------------------------------------------------------------------===// 584 585/// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 586/// scalar floating point type. 587const llvm::fltSemantics &ASTContext::getFloatTypeSemantics(QualType T) const { 588 const BuiltinType *BT = T->getAs<BuiltinType>(); 589 assert(BT && "Not a floating point type!"); 590 switch (BT->getKind()) { 591 default: assert(0 && "Not a floating point type!"); 592 case BuiltinType::Float: return Target.getFloatFormat(); 593 case BuiltinType::Double: return Target.getDoubleFormat(); 594 case BuiltinType::LongDouble: return Target.getLongDoubleFormat(); 595 } 596} 597 598/// getDeclAlign - Return a conservative estimate of the alignment of the 599/// specified decl. Note that bitfields do not have a valid alignment, so 600/// this method will assert on them. 601/// If @p RefAsPointee, references are treated like their underlying type 602/// (for alignof), else they're treated like pointers (for CodeGen). 603CharUnits ASTContext::getDeclAlign(const Decl *D, bool RefAsPointee) const { 604 unsigned Align = Target.getCharWidth(); 605 606 bool UseAlignAttrOnly = false; 607 if (unsigned AlignFromAttr = D->getMaxAlignment()) { 608 Align = AlignFromAttr; 609 610 // __attribute__((aligned)) can increase or decrease alignment 611 // *except* on a struct or struct member, where it only increases 612 // alignment unless 'packed' is also specified. 613 // 614 // It is an error for [[align]] to decrease alignment, so we can 615 // ignore that possibility; Sema should diagnose it. 616 if (isa<FieldDecl>(D)) { 617 UseAlignAttrOnly = D->hasAttr<PackedAttr>() || 618 cast<FieldDecl>(D)->getParent()->hasAttr<PackedAttr>(); 619 } else { 620 UseAlignAttrOnly = true; 621 } 622 } 623 624 // If we're using the align attribute only, just ignore everything 625 // else about the declaration and its type. 626 if (UseAlignAttrOnly) { 627 // do nothing 628 629 } else if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) { 630 QualType T = VD->getType(); 631 if (const ReferenceType* RT = T->getAs<ReferenceType>()) { 632 if (RefAsPointee) 633 T = RT->getPointeeType(); 634 else 635 T = getPointerType(RT->getPointeeType()); 636 } 637 if (!T->isIncompleteType() && !T->isFunctionType()) { 638 // Adjust alignments of declarations with array type by the 639 // large-array alignment on the target. 640 unsigned MinWidth = Target.getLargeArrayMinWidth(); 641 const ArrayType *arrayType; 642 if (MinWidth && (arrayType = getAsArrayType(T))) { 643 if (isa<VariableArrayType>(arrayType)) 644 Align = std::max(Align, Target.getLargeArrayAlign()); 645 else if (isa<ConstantArrayType>(arrayType) && 646 MinWidth <= getTypeSize(cast<ConstantArrayType>(arrayType))) 647 Align = std::max(Align, Target.getLargeArrayAlign()); 648 649 // Walk through any array types while we're at it. 650 T = getBaseElementType(arrayType); 651 } 652 Align = std::max(Align, getPreferredTypeAlign(T.getTypePtr())); 653 } 654 655 // Fields can be subject to extra alignment constraints, like if 656 // the field is packed, the struct is packed, or the struct has a 657 // a max-field-alignment constraint (#pragma pack). So calculate 658 // the actual alignment of the field within the struct, and then 659 // (as we're expected to) constrain that by the alignment of the type. 660 if (const FieldDecl *field = dyn_cast<FieldDecl>(VD)) { 661 // So calculate the alignment of the field. 662 const ASTRecordLayout &layout = getASTRecordLayout(field->getParent()); 663 664 // Start with the record's overall alignment. 665 unsigned fieldAlign = toBits(layout.getAlignment()); 666 667 // Use the GCD of that and the offset within the record. 668 uint64_t offset = layout.getFieldOffset(field->getFieldIndex()); 669 if (offset > 0) { 670 // Alignment is always a power of 2, so the GCD will be a power of 2, 671 // which means we get to do this crazy thing instead of Euclid's. 672 uint64_t lowBitOfOffset = offset & (~offset + 1); 673 if (lowBitOfOffset < fieldAlign) 674 fieldAlign = static_cast<unsigned>(lowBitOfOffset); 675 } 676 677 Align = std::min(Align, fieldAlign); 678 } 679 } 680 681 return toCharUnitsFromBits(Align); 682} 683 684std::pair<CharUnits, CharUnits> 685ASTContext::getTypeInfoInChars(const Type *T) const { 686 std::pair<uint64_t, unsigned> Info = getTypeInfo(T); 687 return std::make_pair(toCharUnitsFromBits(Info.first), 688 toCharUnitsFromBits(Info.second)); 689} 690 691std::pair<CharUnits, CharUnits> 692ASTContext::getTypeInfoInChars(QualType T) const { 693 return getTypeInfoInChars(T.getTypePtr()); 694} 695 696/// getTypeSize - Return the size of the specified type, in bits. This method 697/// does not work on incomplete types. 698/// 699/// FIXME: Pointers into different addr spaces could have different sizes and 700/// alignment requirements: getPointerInfo should take an AddrSpace, this 701/// should take a QualType, &c. 702std::pair<uint64_t, unsigned> 703ASTContext::getTypeInfo(const Type *T) const { 704 uint64_t Width=0; 705 unsigned Align=8; 706 switch (T->getTypeClass()) { 707#define TYPE(Class, Base) 708#define ABSTRACT_TYPE(Class, Base) 709#define NON_CANONICAL_TYPE(Class, Base) 710#define DEPENDENT_TYPE(Class, Base) case Type::Class: 711#include "clang/AST/TypeNodes.def" 712 assert(false && "Should not see dependent types"); 713 break; 714 715 case Type::FunctionNoProto: 716 case Type::FunctionProto: 717 // GCC extension: alignof(function) = 32 bits 718 Width = 0; 719 Align = 32; 720 break; 721 722 case Type::IncompleteArray: 723 case Type::VariableArray: 724 Width = 0; 725 Align = getTypeAlign(cast<ArrayType>(T)->getElementType()); 726 break; 727 728 case Type::ConstantArray: { 729 const ConstantArrayType *CAT = cast<ConstantArrayType>(T); 730 731 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(CAT->getElementType()); 732 Width = EltInfo.first*CAT->getSize().getZExtValue(); 733 Align = EltInfo.second; 734 Width = llvm::RoundUpToAlignment(Width, Align); 735 break; 736 } 737 case Type::ExtVector: 738 case Type::Vector: { 739 const VectorType *VT = cast<VectorType>(T); 740 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(VT->getElementType()); 741 Width = EltInfo.first*VT->getNumElements(); 742 Align = Width; 743 // If the alignment is not a power of 2, round up to the next power of 2. 744 // This happens for non-power-of-2 length vectors. 745 if (Align & (Align-1)) { 746 Align = llvm::NextPowerOf2(Align); 747 Width = llvm::RoundUpToAlignment(Width, Align); 748 } 749 break; 750 } 751 752 case Type::Builtin: 753 switch (cast<BuiltinType>(T)->getKind()) { 754 default: assert(0 && "Unknown builtin type!"); 755 case BuiltinType::Void: 756 // GCC extension: alignof(void) = 8 bits. 757 Width = 0; 758 Align = 8; 759 break; 760 761 case BuiltinType::Bool: 762 Width = Target.getBoolWidth(); 763 Align = Target.getBoolAlign(); 764 break; 765 case BuiltinType::Char_S: 766 case BuiltinType::Char_U: 767 case BuiltinType::UChar: 768 case BuiltinType::SChar: 769 Width = Target.getCharWidth(); 770 Align = Target.getCharAlign(); 771 break; 772 case BuiltinType::WChar_S: 773 case BuiltinType::WChar_U: 774 Width = Target.getWCharWidth(); 775 Align = Target.getWCharAlign(); 776 break; 777 case BuiltinType::Char16: 778 Width = Target.getChar16Width(); 779 Align = Target.getChar16Align(); 780 break; 781 case BuiltinType::Char32: 782 Width = Target.getChar32Width(); 783 Align = Target.getChar32Align(); 784 break; 785 case BuiltinType::UShort: 786 case BuiltinType::Short: 787 Width = Target.getShortWidth(); 788 Align = Target.getShortAlign(); 789 break; 790 case BuiltinType::UInt: 791 case BuiltinType::Int: 792 Width = Target.getIntWidth(); 793 Align = Target.getIntAlign(); 794 break; 795 case BuiltinType::ULong: 796 case BuiltinType::Long: 797 Width = Target.getLongWidth(); 798 Align = Target.getLongAlign(); 799 break; 800 case BuiltinType::ULongLong: 801 case BuiltinType::LongLong: 802 Width = Target.getLongLongWidth(); 803 Align = Target.getLongLongAlign(); 804 break; 805 case BuiltinType::Int128: 806 case BuiltinType::UInt128: 807 Width = 128; 808 Align = 128; // int128_t is 128-bit aligned on all targets. 809 break; 810 case BuiltinType::Float: 811 Width = Target.getFloatWidth(); 812 Align = Target.getFloatAlign(); 813 break; 814 case BuiltinType::Double: 815 Width = Target.getDoubleWidth(); 816 Align = Target.getDoubleAlign(); 817 break; 818 case BuiltinType::LongDouble: 819 Width = Target.getLongDoubleWidth(); 820 Align = Target.getLongDoubleAlign(); 821 break; 822 case BuiltinType::NullPtr: 823 Width = Target.getPointerWidth(0); // C++ 3.9.1p11: sizeof(nullptr_t) 824 Align = Target.getPointerAlign(0); // == sizeof(void*) 825 break; 826 case BuiltinType::ObjCId: 827 case BuiltinType::ObjCClass: 828 case BuiltinType::ObjCSel: 829 Width = Target.getPointerWidth(0); 830 Align = Target.getPointerAlign(0); 831 break; 832 } 833 break; 834 case Type::ObjCObjectPointer: 835 Width = Target.getPointerWidth(0); 836 Align = Target.getPointerAlign(0); 837 break; 838 case Type::BlockPointer: { 839 unsigned AS = getTargetAddressSpace( 840 cast<BlockPointerType>(T)->getPointeeType()); 841 Width = Target.getPointerWidth(AS); 842 Align = Target.getPointerAlign(AS); 843 break; 844 } 845 case Type::LValueReference: 846 case Type::RValueReference: { 847 // alignof and sizeof should never enter this code path here, so we go 848 // the pointer route. 849 unsigned AS = getTargetAddressSpace( 850 cast<ReferenceType>(T)->getPointeeType()); 851 Width = Target.getPointerWidth(AS); 852 Align = Target.getPointerAlign(AS); 853 break; 854 } 855 case Type::Pointer: { 856 unsigned AS = getTargetAddressSpace(cast<PointerType>(T)->getPointeeType()); 857 Width = Target.getPointerWidth(AS); 858 Align = Target.getPointerAlign(AS); 859 break; 860 } 861 case Type::MemberPointer: { 862 const MemberPointerType *MPT = cast<MemberPointerType>(T); 863 std::pair<uint64_t, unsigned> PtrDiffInfo = 864 getTypeInfo(getPointerDiffType()); 865 Width = PtrDiffInfo.first * ABI->getMemberPointerSize(MPT); 866 Align = PtrDiffInfo.second; 867 break; 868 } 869 case Type::Complex: { 870 // Complex types have the same alignment as their elements, but twice the 871 // size. 872 std::pair<uint64_t, unsigned> EltInfo = 873 getTypeInfo(cast<ComplexType>(T)->getElementType()); 874 Width = EltInfo.first*2; 875 Align = EltInfo.second; 876 break; 877 } 878 case Type::ObjCObject: 879 return getTypeInfo(cast<ObjCObjectType>(T)->getBaseType().getTypePtr()); 880 case Type::ObjCInterface: { 881 const ObjCInterfaceType *ObjCI = cast<ObjCInterfaceType>(T); 882 const ASTRecordLayout &Layout = getASTObjCInterfaceLayout(ObjCI->getDecl()); 883 Width = toBits(Layout.getSize()); 884 Align = toBits(Layout.getAlignment()); 885 break; 886 } 887 case Type::Record: 888 case Type::Enum: { 889 const TagType *TT = cast<TagType>(T); 890 891 if (TT->getDecl()->isInvalidDecl()) { 892 Width = 8; 893 Align = 8; 894 break; 895 } 896 897 if (const EnumType *ET = dyn_cast<EnumType>(TT)) 898 return getTypeInfo(ET->getDecl()->getIntegerType()); 899 900 const RecordType *RT = cast<RecordType>(TT); 901 const ASTRecordLayout &Layout = getASTRecordLayout(RT->getDecl()); 902 Width = toBits(Layout.getSize()); 903 Align = toBits(Layout.getAlignment()); 904 break; 905 } 906 907 case Type::SubstTemplateTypeParm: 908 return getTypeInfo(cast<SubstTemplateTypeParmType>(T)-> 909 getReplacementType().getTypePtr()); 910 911 case Type::Auto: { 912 const AutoType *A = cast<AutoType>(T); 913 assert(A->isDeduced() && "Cannot request the size of a dependent type"); 914 return getTypeInfo(A->getDeducedType().getTypePtr()); 915 } 916 917 case Type::Paren: 918 return getTypeInfo(cast<ParenType>(T)->getInnerType().getTypePtr()); 919 920 case Type::Typedef: { 921 const TypedefNameDecl *Typedef = cast<TypedefType>(T)->getDecl(); 922 std::pair<uint64_t, unsigned> Info 923 = getTypeInfo(Typedef->getUnderlyingType().getTypePtr()); 924 // If the typedef has an aligned attribute on it, it overrides any computed 925 // alignment we have. This violates the GCC documentation (which says that 926 // attribute(aligned) can only round up) but matches its implementation. 927 if (unsigned AttrAlign = Typedef->getMaxAlignment()) 928 Align = AttrAlign; 929 else 930 Align = Info.second; 931 Width = Info.first; 932 break; 933 } 934 935 case Type::TypeOfExpr: 936 return getTypeInfo(cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType() 937 .getTypePtr()); 938 939 case Type::TypeOf: 940 return getTypeInfo(cast<TypeOfType>(T)->getUnderlyingType().getTypePtr()); 941 942 case Type::Decltype: 943 return getTypeInfo(cast<DecltypeType>(T)->getUnderlyingExpr()->getType() 944 .getTypePtr()); 945 946 case Type::Elaborated: 947 return getTypeInfo(cast<ElaboratedType>(T)->getNamedType().getTypePtr()); 948 949 case Type::Attributed: 950 return getTypeInfo( 951 cast<AttributedType>(T)->getEquivalentType().getTypePtr()); 952 953 case Type::TemplateSpecialization: 954 assert(getCanonicalType(T) != T && 955 "Cannot request the size of a dependent type"); 956 // FIXME: this is likely to be wrong once we support template 957 // aliases, since a template alias could refer to a typedef that 958 // has an __aligned__ attribute on it. 959 return getTypeInfo(getCanonicalType(T)); 960 } 961 962 assert(Align && (Align & (Align-1)) == 0 && "Alignment must be power of 2"); 963 return std::make_pair(Width, Align); 964} 965 966/// toCharUnitsFromBits - Convert a size in bits to a size in characters. 967CharUnits ASTContext::toCharUnitsFromBits(int64_t BitSize) const { 968 return CharUnits::fromQuantity(BitSize / getCharWidth()); 969} 970 971/// toBits - Convert a size in characters to a size in characters. 972int64_t ASTContext::toBits(CharUnits CharSize) const { 973 return CharSize.getQuantity() * getCharWidth(); 974} 975 976/// getTypeSizeInChars - Return the size of the specified type, in characters. 977/// This method does not work on incomplete types. 978CharUnits ASTContext::getTypeSizeInChars(QualType T) const { 979 return toCharUnitsFromBits(getTypeSize(T)); 980} 981CharUnits ASTContext::getTypeSizeInChars(const Type *T) const { 982 return toCharUnitsFromBits(getTypeSize(T)); 983} 984 985/// getTypeAlignInChars - Return the ABI-specified alignment of a type, in 986/// characters. This method does not work on incomplete types. 987CharUnits ASTContext::getTypeAlignInChars(QualType T) const { 988 return toCharUnitsFromBits(getTypeAlign(T)); 989} 990CharUnits ASTContext::getTypeAlignInChars(const Type *T) const { 991 return toCharUnitsFromBits(getTypeAlign(T)); 992} 993 994/// getPreferredTypeAlign - Return the "preferred" alignment of the specified 995/// type for the current target in bits. This can be different than the ABI 996/// alignment in cases where it is beneficial for performance to overalign 997/// a data type. 998unsigned ASTContext::getPreferredTypeAlign(const Type *T) const { 999 unsigned ABIAlign = getTypeAlign(T); 1000 1001 // Double and long long should be naturally aligned if possible. 1002 if (const ComplexType* CT = T->getAs<ComplexType>()) 1003 T = CT->getElementType().getTypePtr(); 1004 if (T->isSpecificBuiltinType(BuiltinType::Double) || 1005 T->isSpecificBuiltinType(BuiltinType::LongLong)) 1006 return std::max(ABIAlign, (unsigned)getTypeSize(T)); 1007 1008 return ABIAlign; 1009} 1010 1011/// ShallowCollectObjCIvars - 1012/// Collect all ivars, including those synthesized, in the current class. 1013/// 1014void ASTContext::ShallowCollectObjCIvars(const ObjCInterfaceDecl *OI, 1015 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) const { 1016 // FIXME. This need be removed but there are two many places which 1017 // assume const-ness of ObjCInterfaceDecl 1018 ObjCInterfaceDecl *IDecl = const_cast<ObjCInterfaceDecl *>(OI); 1019 for (ObjCIvarDecl *Iv = IDecl->all_declared_ivar_begin(); Iv; 1020 Iv= Iv->getNextIvar()) 1021 Ivars.push_back(Iv); 1022} 1023 1024/// DeepCollectObjCIvars - 1025/// This routine first collects all declared, but not synthesized, ivars in 1026/// super class and then collects all ivars, including those synthesized for 1027/// current class. This routine is used for implementation of current class 1028/// when all ivars, declared and synthesized are known. 1029/// 1030void ASTContext::DeepCollectObjCIvars(const ObjCInterfaceDecl *OI, 1031 bool leafClass, 1032 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) const { 1033 if (const ObjCInterfaceDecl *SuperClass = OI->getSuperClass()) 1034 DeepCollectObjCIvars(SuperClass, false, Ivars); 1035 if (!leafClass) { 1036 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 1037 E = OI->ivar_end(); I != E; ++I) 1038 Ivars.push_back(*I); 1039 } 1040 else 1041 ShallowCollectObjCIvars(OI, Ivars); 1042} 1043 1044/// CollectInheritedProtocols - Collect all protocols in current class and 1045/// those inherited by it. 1046void ASTContext::CollectInheritedProtocols(const Decl *CDecl, 1047 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols) { 1048 if (const ObjCInterfaceDecl *OI = dyn_cast<ObjCInterfaceDecl>(CDecl)) { 1049 // We can use protocol_iterator here instead of 1050 // all_referenced_protocol_iterator since we are walking all categories. 1051 for (ObjCInterfaceDecl::all_protocol_iterator P = OI->all_referenced_protocol_begin(), 1052 PE = OI->all_referenced_protocol_end(); P != PE; ++P) { 1053 ObjCProtocolDecl *Proto = (*P); 1054 Protocols.insert(Proto); 1055 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1056 PE = Proto->protocol_end(); P != PE; ++P) { 1057 Protocols.insert(*P); 1058 CollectInheritedProtocols(*P, Protocols); 1059 } 1060 } 1061 1062 // Categories of this Interface. 1063 for (const ObjCCategoryDecl *CDeclChain = OI->getCategoryList(); 1064 CDeclChain; CDeclChain = CDeclChain->getNextClassCategory()) 1065 CollectInheritedProtocols(CDeclChain, Protocols); 1066 if (ObjCInterfaceDecl *SD = OI->getSuperClass()) 1067 while (SD) { 1068 CollectInheritedProtocols(SD, Protocols); 1069 SD = SD->getSuperClass(); 1070 } 1071 } else if (const ObjCCategoryDecl *OC = dyn_cast<ObjCCategoryDecl>(CDecl)) { 1072 for (ObjCCategoryDecl::protocol_iterator P = OC->protocol_begin(), 1073 PE = OC->protocol_end(); P != PE; ++P) { 1074 ObjCProtocolDecl *Proto = (*P); 1075 Protocols.insert(Proto); 1076 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1077 PE = Proto->protocol_end(); P != PE; ++P) 1078 CollectInheritedProtocols(*P, Protocols); 1079 } 1080 } else if (const ObjCProtocolDecl *OP = dyn_cast<ObjCProtocolDecl>(CDecl)) { 1081 for (ObjCProtocolDecl::protocol_iterator P = OP->protocol_begin(), 1082 PE = OP->protocol_end(); P != PE; ++P) { 1083 ObjCProtocolDecl *Proto = (*P); 1084 Protocols.insert(Proto); 1085 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1086 PE = Proto->protocol_end(); P != PE; ++P) 1087 CollectInheritedProtocols(*P, Protocols); 1088 } 1089 } 1090} 1091 1092unsigned ASTContext::CountNonClassIvars(const ObjCInterfaceDecl *OI) const { 1093 unsigned count = 0; 1094 // Count ivars declared in class extension. 1095 for (const ObjCCategoryDecl *CDecl = OI->getFirstClassExtension(); CDecl; 1096 CDecl = CDecl->getNextClassExtension()) 1097 count += CDecl->ivar_size(); 1098 1099 // Count ivar defined in this class's implementation. This 1100 // includes synthesized ivars. 1101 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) 1102 count += ImplDecl->ivar_size(); 1103 1104 return count; 1105} 1106 1107/// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 1108ObjCImplementationDecl *ASTContext::getObjCImplementation(ObjCInterfaceDecl *D) { 1109 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 1110 I = ObjCImpls.find(D); 1111 if (I != ObjCImpls.end()) 1112 return cast<ObjCImplementationDecl>(I->second); 1113 return 0; 1114} 1115/// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 1116ObjCCategoryImplDecl *ASTContext::getObjCImplementation(ObjCCategoryDecl *D) { 1117 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 1118 I = ObjCImpls.find(D); 1119 if (I != ObjCImpls.end()) 1120 return cast<ObjCCategoryImplDecl>(I->second); 1121 return 0; 1122} 1123 1124/// \brief Set the implementation of ObjCInterfaceDecl. 1125void ASTContext::setObjCImplementation(ObjCInterfaceDecl *IFaceD, 1126 ObjCImplementationDecl *ImplD) { 1127 assert(IFaceD && ImplD && "Passed null params"); 1128 ObjCImpls[IFaceD] = ImplD; 1129} 1130/// \brief Set the implementation of ObjCCategoryDecl. 1131void ASTContext::setObjCImplementation(ObjCCategoryDecl *CatD, 1132 ObjCCategoryImplDecl *ImplD) { 1133 assert(CatD && ImplD && "Passed null params"); 1134 ObjCImpls[CatD] = ImplD; 1135} 1136 1137/// \brief Get the copy initialization expression of VarDecl,or NULL if 1138/// none exists. 1139Expr *ASTContext::getBlockVarCopyInits(const VarDecl*VD) { 1140 assert(VD && "Passed null params"); 1141 assert(VD->hasAttr<BlocksAttr>() && 1142 "getBlockVarCopyInits - not __block var"); 1143 llvm::DenseMap<const VarDecl*, Expr*>::iterator 1144 I = BlockVarCopyInits.find(VD); 1145 return (I != BlockVarCopyInits.end()) ? cast<Expr>(I->second) : 0; 1146} 1147 1148/// \brief Set the copy inialization expression of a block var decl. 1149void ASTContext::setBlockVarCopyInits(VarDecl*VD, Expr* Init) { 1150 assert(VD && Init && "Passed null params"); 1151 assert(VD->hasAttr<BlocksAttr>() && 1152 "setBlockVarCopyInits - not __block var"); 1153 BlockVarCopyInits[VD] = Init; 1154} 1155 1156/// \brief Allocate an uninitialized TypeSourceInfo. 1157/// 1158/// The caller should initialize the memory held by TypeSourceInfo using 1159/// the TypeLoc wrappers. 1160/// 1161/// \param T the type that will be the basis for type source info. This type 1162/// should refer to how the declarator was written in source code, not to 1163/// what type semantic analysis resolved the declarator to. 1164TypeSourceInfo *ASTContext::CreateTypeSourceInfo(QualType T, 1165 unsigned DataSize) const { 1166 if (!DataSize) 1167 DataSize = TypeLoc::getFullDataSizeForType(T); 1168 else 1169 assert(DataSize == TypeLoc::getFullDataSizeForType(T) && 1170 "incorrect data size provided to CreateTypeSourceInfo!"); 1171 1172 TypeSourceInfo *TInfo = 1173 (TypeSourceInfo*)BumpAlloc.Allocate(sizeof(TypeSourceInfo) + DataSize, 8); 1174 new (TInfo) TypeSourceInfo(T); 1175 return TInfo; 1176} 1177 1178TypeSourceInfo *ASTContext::getTrivialTypeSourceInfo(QualType T, 1179 SourceLocation L) const { 1180 TypeSourceInfo *DI = CreateTypeSourceInfo(T); 1181 DI->getTypeLoc().initialize(const_cast<ASTContext &>(*this), L); 1182 return DI; 1183} 1184 1185const ASTRecordLayout & 1186ASTContext::getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) const { 1187 return getObjCLayout(D, 0); 1188} 1189 1190const ASTRecordLayout & 1191ASTContext::getASTObjCImplementationLayout( 1192 const ObjCImplementationDecl *D) const { 1193 return getObjCLayout(D->getClassInterface(), D); 1194} 1195 1196//===----------------------------------------------------------------------===// 1197// Type creation/memoization methods 1198//===----------------------------------------------------------------------===// 1199 1200QualType 1201ASTContext::getExtQualType(const Type *baseType, Qualifiers quals) const { 1202 unsigned fastQuals = quals.getFastQualifiers(); 1203 quals.removeFastQualifiers(); 1204 1205 // Check if we've already instantiated this type. 1206 llvm::FoldingSetNodeID ID; 1207 ExtQuals::Profile(ID, baseType, quals); 1208 void *insertPos = 0; 1209 if (ExtQuals *eq = ExtQualNodes.FindNodeOrInsertPos(ID, insertPos)) { 1210 assert(eq->getQualifiers() == quals); 1211 return QualType(eq, fastQuals); 1212 } 1213 1214 // If the base type is not canonical, make the appropriate canonical type. 1215 QualType canon; 1216 if (!baseType->isCanonicalUnqualified()) { 1217 SplitQualType canonSplit = baseType->getCanonicalTypeInternal().split(); 1218 canonSplit.second.addConsistentQualifiers(quals); 1219 canon = getExtQualType(canonSplit.first, canonSplit.second); 1220 1221 // Re-find the insert position. 1222 (void) ExtQualNodes.FindNodeOrInsertPos(ID, insertPos); 1223 } 1224 1225 ExtQuals *eq = new (*this, TypeAlignment) ExtQuals(baseType, canon, quals); 1226 ExtQualNodes.InsertNode(eq, insertPos); 1227 return QualType(eq, fastQuals); 1228} 1229 1230QualType 1231ASTContext::getAddrSpaceQualType(QualType T, unsigned AddressSpace) const { 1232 QualType CanT = getCanonicalType(T); 1233 if (CanT.getAddressSpace() == AddressSpace) 1234 return T; 1235 1236 // If we are composing extended qualifiers together, merge together 1237 // into one ExtQuals node. 1238 QualifierCollector Quals; 1239 const Type *TypeNode = Quals.strip(T); 1240 1241 // If this type already has an address space specified, it cannot get 1242 // another one. 1243 assert(!Quals.hasAddressSpace() && 1244 "Type cannot be in multiple addr spaces!"); 1245 Quals.addAddressSpace(AddressSpace); 1246 1247 return getExtQualType(TypeNode, Quals); 1248} 1249 1250QualType ASTContext::getObjCGCQualType(QualType T, 1251 Qualifiers::GC GCAttr) const { 1252 QualType CanT = getCanonicalType(T); 1253 if (CanT.getObjCGCAttr() == GCAttr) 1254 return T; 1255 1256 if (const PointerType *ptr = T->getAs<PointerType>()) { 1257 QualType Pointee = ptr->getPointeeType(); 1258 if (Pointee->isAnyPointerType()) { 1259 QualType ResultType = getObjCGCQualType(Pointee, GCAttr); 1260 return getPointerType(ResultType); 1261 } 1262 } 1263 1264 // If we are composing extended qualifiers together, merge together 1265 // into one ExtQuals node. 1266 QualifierCollector Quals; 1267 const Type *TypeNode = Quals.strip(T); 1268 1269 // If this type already has an ObjCGC specified, it cannot get 1270 // another one. 1271 assert(!Quals.hasObjCGCAttr() && 1272 "Type cannot have multiple ObjCGCs!"); 1273 Quals.addObjCGCAttr(GCAttr); 1274 1275 return getExtQualType(TypeNode, Quals); 1276} 1277 1278const FunctionType *ASTContext::adjustFunctionType(const FunctionType *T, 1279 FunctionType::ExtInfo Info) { 1280 if (T->getExtInfo() == Info) 1281 return T; 1282 1283 QualType Result; 1284 if (const FunctionNoProtoType *FNPT = dyn_cast<FunctionNoProtoType>(T)) { 1285 Result = getFunctionNoProtoType(FNPT->getResultType(), Info); 1286 } else { 1287 const FunctionProtoType *FPT = cast<FunctionProtoType>(T); 1288 FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); 1289 EPI.ExtInfo = Info; 1290 Result = getFunctionType(FPT->getResultType(), FPT->arg_type_begin(), 1291 FPT->getNumArgs(), EPI); 1292 } 1293 1294 return cast<FunctionType>(Result.getTypePtr()); 1295} 1296 1297/// getComplexType - Return the uniqued reference to the type for a complex 1298/// number with the specified element type. 1299QualType ASTContext::getComplexType(QualType T) const { 1300 // Unique pointers, to guarantee there is only one pointer of a particular 1301 // structure. 1302 llvm::FoldingSetNodeID ID; 1303 ComplexType::Profile(ID, T); 1304 1305 void *InsertPos = 0; 1306 if (ComplexType *CT = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos)) 1307 return QualType(CT, 0); 1308 1309 // If the pointee type isn't canonical, this won't be a canonical type either, 1310 // so fill in the canonical type field. 1311 QualType Canonical; 1312 if (!T.isCanonical()) { 1313 Canonical = getComplexType(getCanonicalType(T)); 1314 1315 // Get the new insert position for the node we care about. 1316 ComplexType *NewIP = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos); 1317 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1318 } 1319 ComplexType *New = new (*this, TypeAlignment) ComplexType(T, Canonical); 1320 Types.push_back(New); 1321 ComplexTypes.InsertNode(New, InsertPos); 1322 return QualType(New, 0); 1323} 1324 1325/// getPointerType - Return the uniqued reference to the type for a pointer to 1326/// the specified type. 1327QualType ASTContext::getPointerType(QualType T) const { 1328 // Unique pointers, to guarantee there is only one pointer of a particular 1329 // structure. 1330 llvm::FoldingSetNodeID ID; 1331 PointerType::Profile(ID, T); 1332 1333 void *InsertPos = 0; 1334 if (PointerType *PT = PointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1335 return QualType(PT, 0); 1336 1337 // If the pointee type isn't canonical, this won't be a canonical type either, 1338 // so fill in the canonical type field. 1339 QualType Canonical; 1340 if (!T.isCanonical()) { 1341 Canonical = getPointerType(getCanonicalType(T)); 1342 1343 // Get the new insert position for the node we care about. 1344 PointerType *NewIP = PointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1345 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1346 } 1347 PointerType *New = new (*this, TypeAlignment) PointerType(T, Canonical); 1348 Types.push_back(New); 1349 PointerTypes.InsertNode(New, InsertPos); 1350 return QualType(New, 0); 1351} 1352 1353/// getBlockPointerType - Return the uniqued reference to the type for 1354/// a pointer to the specified block. 1355QualType ASTContext::getBlockPointerType(QualType T) const { 1356 assert(T->isFunctionType() && "block of function types only"); 1357 // Unique pointers, to guarantee there is only one block of a particular 1358 // structure. 1359 llvm::FoldingSetNodeID ID; 1360 BlockPointerType::Profile(ID, T); 1361 1362 void *InsertPos = 0; 1363 if (BlockPointerType *PT = 1364 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1365 return QualType(PT, 0); 1366 1367 // If the block pointee type isn't canonical, this won't be a canonical 1368 // type either so fill in the canonical type field. 1369 QualType Canonical; 1370 if (!T.isCanonical()) { 1371 Canonical = getBlockPointerType(getCanonicalType(T)); 1372 1373 // Get the new insert position for the node we care about. 1374 BlockPointerType *NewIP = 1375 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1376 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1377 } 1378 BlockPointerType *New 1379 = new (*this, TypeAlignment) BlockPointerType(T, Canonical); 1380 Types.push_back(New); 1381 BlockPointerTypes.InsertNode(New, InsertPos); 1382 return QualType(New, 0); 1383} 1384 1385/// getLValueReferenceType - Return the uniqued reference to the type for an 1386/// lvalue reference to the specified type. 1387QualType 1388ASTContext::getLValueReferenceType(QualType T, bool SpelledAsLValue) const { 1389 // Unique pointers, to guarantee there is only one pointer of a particular 1390 // structure. 1391 llvm::FoldingSetNodeID ID; 1392 ReferenceType::Profile(ID, T, SpelledAsLValue); 1393 1394 void *InsertPos = 0; 1395 if (LValueReferenceType *RT = 1396 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1397 return QualType(RT, 0); 1398 1399 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1400 1401 // If the referencee type isn't canonical, this won't be a canonical type 1402 // either, so fill in the canonical type field. 1403 QualType Canonical; 1404 if (!SpelledAsLValue || InnerRef || !T.isCanonical()) { 1405 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1406 Canonical = getLValueReferenceType(getCanonicalType(PointeeType)); 1407 1408 // Get the new insert position for the node we care about. 1409 LValueReferenceType *NewIP = 1410 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1411 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1412 } 1413 1414 LValueReferenceType *New 1415 = new (*this, TypeAlignment) LValueReferenceType(T, Canonical, 1416 SpelledAsLValue); 1417 Types.push_back(New); 1418 LValueReferenceTypes.InsertNode(New, InsertPos); 1419 1420 return QualType(New, 0); 1421} 1422 1423/// getRValueReferenceType - Return the uniqued reference to the type for an 1424/// rvalue reference to the specified type. 1425QualType ASTContext::getRValueReferenceType(QualType T) const { 1426 // Unique pointers, to guarantee there is only one pointer of a particular 1427 // structure. 1428 llvm::FoldingSetNodeID ID; 1429 ReferenceType::Profile(ID, T, false); 1430 1431 void *InsertPos = 0; 1432 if (RValueReferenceType *RT = 1433 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1434 return QualType(RT, 0); 1435 1436 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1437 1438 // If the referencee type isn't canonical, this won't be a canonical type 1439 // either, so fill in the canonical type field. 1440 QualType Canonical; 1441 if (InnerRef || !T.isCanonical()) { 1442 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1443 Canonical = getRValueReferenceType(getCanonicalType(PointeeType)); 1444 1445 // Get the new insert position for the node we care about. 1446 RValueReferenceType *NewIP = 1447 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1448 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1449 } 1450 1451 RValueReferenceType *New 1452 = new (*this, TypeAlignment) RValueReferenceType(T, Canonical); 1453 Types.push_back(New); 1454 RValueReferenceTypes.InsertNode(New, InsertPos); 1455 return QualType(New, 0); 1456} 1457 1458/// getMemberPointerType - Return the uniqued reference to the type for a 1459/// member pointer to the specified type, in the specified class. 1460QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls) const { 1461 // Unique pointers, to guarantee there is only one pointer of a particular 1462 // structure. 1463 llvm::FoldingSetNodeID ID; 1464 MemberPointerType::Profile(ID, T, Cls); 1465 1466 void *InsertPos = 0; 1467 if (MemberPointerType *PT = 1468 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1469 return QualType(PT, 0); 1470 1471 // If the pointee or class type isn't canonical, this won't be a canonical 1472 // type either, so fill in the canonical type field. 1473 QualType Canonical; 1474 if (!T.isCanonical() || !Cls->isCanonicalUnqualified()) { 1475 Canonical = getMemberPointerType(getCanonicalType(T),getCanonicalType(Cls)); 1476 1477 // Get the new insert position for the node we care about. 1478 MemberPointerType *NewIP = 1479 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1480 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1481 } 1482 MemberPointerType *New 1483 = new (*this, TypeAlignment) MemberPointerType(T, Cls, Canonical); 1484 Types.push_back(New); 1485 MemberPointerTypes.InsertNode(New, InsertPos); 1486 return QualType(New, 0); 1487} 1488 1489/// getConstantArrayType - Return the unique reference to the type for an 1490/// array of the specified element type. 1491QualType ASTContext::getConstantArrayType(QualType EltTy, 1492 const llvm::APInt &ArySizeIn, 1493 ArrayType::ArraySizeModifier ASM, 1494 unsigned IndexTypeQuals) const { 1495 assert((EltTy->isDependentType() || 1496 EltTy->isIncompleteType() || EltTy->isConstantSizeType()) && 1497 "Constant array of VLAs is illegal!"); 1498 1499 // Convert the array size into a canonical width matching the pointer size for 1500 // the target. 1501 llvm::APInt ArySize(ArySizeIn); 1502 ArySize = 1503 ArySize.zextOrTrunc(Target.getPointerWidth(getTargetAddressSpace(EltTy))); 1504 1505 llvm::FoldingSetNodeID ID; 1506 ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, IndexTypeQuals); 1507 1508 void *InsertPos = 0; 1509 if (ConstantArrayType *ATP = 1510 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1511 return QualType(ATP, 0); 1512 1513 // If the element type isn't canonical or has qualifiers, this won't 1514 // be a canonical type either, so fill in the canonical type field. 1515 QualType Canon; 1516 if (!EltTy.isCanonical() || EltTy.hasLocalQualifiers()) { 1517 SplitQualType canonSplit = getCanonicalType(EltTy).split(); 1518 Canon = getConstantArrayType(QualType(canonSplit.first, 0), ArySize, 1519 ASM, IndexTypeQuals); 1520 Canon = getQualifiedType(Canon, canonSplit.second); 1521 1522 // Get the new insert position for the node we care about. 1523 ConstantArrayType *NewIP = 1524 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1525 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1526 } 1527 1528 ConstantArrayType *New = new(*this,TypeAlignment) 1529 ConstantArrayType(EltTy, Canon, ArySize, ASM, IndexTypeQuals); 1530 ConstantArrayTypes.InsertNode(New, InsertPos); 1531 Types.push_back(New); 1532 return QualType(New, 0); 1533} 1534 1535/// getVariableArrayDecayedType - Turns the given type, which may be 1536/// variably-modified, into the corresponding type with all the known 1537/// sizes replaced with [*]. 1538QualType ASTContext::getVariableArrayDecayedType(QualType type) const { 1539 // Vastly most common case. 1540 if (!type->isVariablyModifiedType()) return type; 1541 1542 QualType result; 1543 1544 SplitQualType split = type.getSplitDesugaredType(); 1545 const Type *ty = split.first; 1546 switch (ty->getTypeClass()) { 1547#define TYPE(Class, Base) 1548#define ABSTRACT_TYPE(Class, Base) 1549#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 1550#include "clang/AST/TypeNodes.def" 1551 llvm_unreachable("didn't desugar past all non-canonical types?"); 1552 1553 // These types should never be variably-modified. 1554 case Type::Builtin: 1555 case Type::Complex: 1556 case Type::Vector: 1557 case Type::ExtVector: 1558 case Type::DependentSizedExtVector: 1559 case Type::ObjCObject: 1560 case Type::ObjCInterface: 1561 case Type::ObjCObjectPointer: 1562 case Type::Record: 1563 case Type::Enum: 1564 case Type::UnresolvedUsing: 1565 case Type::TypeOfExpr: 1566 case Type::TypeOf: 1567 case Type::Decltype: 1568 case Type::DependentName: 1569 case Type::InjectedClassName: 1570 case Type::TemplateSpecialization: 1571 case Type::DependentTemplateSpecialization: 1572 case Type::TemplateTypeParm: 1573 case Type::SubstTemplateTypeParmPack: 1574 case Type::Auto: 1575 case Type::PackExpansion: 1576 llvm_unreachable("type should never be variably-modified"); 1577 1578 // These types can be variably-modified but should never need to 1579 // further decay. 1580 case Type::FunctionNoProto: 1581 case Type::FunctionProto: 1582 case Type::BlockPointer: 1583 case Type::MemberPointer: 1584 return type; 1585 1586 // These types can be variably-modified. All these modifications 1587 // preserve structure except as noted by comments. 1588 // TODO: if we ever care about optimizing VLAs, there are no-op 1589 // optimizations available here. 1590 case Type::Pointer: 1591 result = getPointerType(getVariableArrayDecayedType( 1592 cast<PointerType>(ty)->getPointeeType())); 1593 break; 1594 1595 case Type::LValueReference: { 1596 const LValueReferenceType *lv = cast<LValueReferenceType>(ty); 1597 result = getLValueReferenceType( 1598 getVariableArrayDecayedType(lv->getPointeeType()), 1599 lv->isSpelledAsLValue()); 1600 break; 1601 } 1602 1603 case Type::RValueReference: { 1604 const RValueReferenceType *lv = cast<RValueReferenceType>(ty); 1605 result = getRValueReferenceType( 1606 getVariableArrayDecayedType(lv->getPointeeType())); 1607 break; 1608 } 1609 1610 case Type::ConstantArray: { 1611 const ConstantArrayType *cat = cast<ConstantArrayType>(ty); 1612 result = getConstantArrayType( 1613 getVariableArrayDecayedType(cat->getElementType()), 1614 cat->getSize(), 1615 cat->getSizeModifier(), 1616 cat->getIndexTypeCVRQualifiers()); 1617 break; 1618 } 1619 1620 case Type::DependentSizedArray: { 1621 const DependentSizedArrayType *dat = cast<DependentSizedArrayType>(ty); 1622 result = getDependentSizedArrayType( 1623 getVariableArrayDecayedType(dat->getElementType()), 1624 dat->getSizeExpr(), 1625 dat->getSizeModifier(), 1626 dat->getIndexTypeCVRQualifiers(), 1627 dat->getBracketsRange()); 1628 break; 1629 } 1630 1631 // Turn incomplete types into [*] types. 1632 case Type::IncompleteArray: { 1633 const IncompleteArrayType *iat = cast<IncompleteArrayType>(ty); 1634 result = getVariableArrayType( 1635 getVariableArrayDecayedType(iat->getElementType()), 1636 /*size*/ 0, 1637 ArrayType::Normal, 1638 iat->getIndexTypeCVRQualifiers(), 1639 SourceRange()); 1640 break; 1641 } 1642 1643 // Turn VLA types into [*] types. 1644 case Type::VariableArray: { 1645 const VariableArrayType *vat = cast<VariableArrayType>(ty); 1646 result = getVariableArrayType( 1647 getVariableArrayDecayedType(vat->getElementType()), 1648 /*size*/ 0, 1649 ArrayType::Star, 1650 vat->getIndexTypeCVRQualifiers(), 1651 vat->getBracketsRange()); 1652 break; 1653 } 1654 } 1655 1656 // Apply the top-level qualifiers from the original. 1657 return getQualifiedType(result, split.second); 1658} 1659 1660/// getVariableArrayType - Returns a non-unique reference to the type for a 1661/// variable array of the specified element type. 1662QualType ASTContext::getVariableArrayType(QualType EltTy, 1663 Expr *NumElts, 1664 ArrayType::ArraySizeModifier ASM, 1665 unsigned IndexTypeQuals, 1666 SourceRange Brackets) const { 1667 // Since we don't unique expressions, it isn't possible to unique VLA's 1668 // that have an expression provided for their size. 1669 QualType Canon; 1670 1671 // Be sure to pull qualifiers off the element type. 1672 if (!EltTy.isCanonical() || EltTy.hasLocalQualifiers()) { 1673 SplitQualType canonSplit = getCanonicalType(EltTy).split(); 1674 Canon = getVariableArrayType(QualType(canonSplit.first, 0), NumElts, ASM, 1675 IndexTypeQuals, Brackets); 1676 Canon = getQualifiedType(Canon, canonSplit.second); 1677 } 1678 1679 VariableArrayType *New = new(*this, TypeAlignment) 1680 VariableArrayType(EltTy, Canon, NumElts, ASM, IndexTypeQuals, Brackets); 1681 1682 VariableArrayTypes.push_back(New); 1683 Types.push_back(New); 1684 return QualType(New, 0); 1685} 1686 1687/// getDependentSizedArrayType - Returns a non-unique reference to 1688/// the type for a dependently-sized array of the specified element 1689/// type. 1690QualType ASTContext::getDependentSizedArrayType(QualType elementType, 1691 Expr *numElements, 1692 ArrayType::ArraySizeModifier ASM, 1693 unsigned elementTypeQuals, 1694 SourceRange brackets) const { 1695 assert((!numElements || numElements->isTypeDependent() || 1696 numElements->isValueDependent()) && 1697 "Size must be type- or value-dependent!"); 1698 1699 // Dependently-sized array types that do not have a specified number 1700 // of elements will have their sizes deduced from a dependent 1701 // initializer. We do no canonicalization here at all, which is okay 1702 // because they can't be used in most locations. 1703 if (!numElements) { 1704 DependentSizedArrayType *newType 1705 = new (*this, TypeAlignment) 1706 DependentSizedArrayType(*this, elementType, QualType(), 1707 numElements, ASM, elementTypeQuals, 1708 brackets); 1709 Types.push_back(newType); 1710 return QualType(newType, 0); 1711 } 1712 1713 // Otherwise, we actually build a new type every time, but we 1714 // also build a canonical type. 1715 1716 SplitQualType canonElementType = getCanonicalType(elementType).split(); 1717 1718 void *insertPos = 0; 1719 llvm::FoldingSetNodeID ID; 1720 DependentSizedArrayType::Profile(ID, *this, 1721 QualType(canonElementType.first, 0), 1722 ASM, elementTypeQuals, numElements); 1723 1724 // Look for an existing type with these properties. 1725 DependentSizedArrayType *canonTy = 1726 DependentSizedArrayTypes.FindNodeOrInsertPos(ID, insertPos); 1727 1728 // If we don't have one, build one. 1729 if (!canonTy) { 1730 canonTy = new (*this, TypeAlignment) 1731 DependentSizedArrayType(*this, QualType(canonElementType.first, 0), 1732 QualType(), numElements, ASM, elementTypeQuals, 1733 brackets); 1734 DependentSizedArrayTypes.InsertNode(canonTy, insertPos); 1735 Types.push_back(canonTy); 1736 } 1737 1738 // Apply qualifiers from the element type to the array. 1739 QualType canon = getQualifiedType(QualType(canonTy,0), 1740 canonElementType.second); 1741 1742 // If we didn't need extra canonicalization for the element type, 1743 // then just use that as our result. 1744 if (QualType(canonElementType.first, 0) == elementType) 1745 return canon; 1746 1747 // Otherwise, we need to build a type which follows the spelling 1748 // of the element type. 1749 DependentSizedArrayType *sugaredType 1750 = new (*this, TypeAlignment) 1751 DependentSizedArrayType(*this, elementType, canon, numElements, 1752 ASM, elementTypeQuals, brackets); 1753 Types.push_back(sugaredType); 1754 return QualType(sugaredType, 0); 1755} 1756 1757QualType ASTContext::getIncompleteArrayType(QualType elementType, 1758 ArrayType::ArraySizeModifier ASM, 1759 unsigned elementTypeQuals) const { 1760 llvm::FoldingSetNodeID ID; 1761 IncompleteArrayType::Profile(ID, elementType, ASM, elementTypeQuals); 1762 1763 void *insertPos = 0; 1764 if (IncompleteArrayType *iat = 1765 IncompleteArrayTypes.FindNodeOrInsertPos(ID, insertPos)) 1766 return QualType(iat, 0); 1767 1768 // If the element type isn't canonical, this won't be a canonical type 1769 // either, so fill in the canonical type field. We also have to pull 1770 // qualifiers off the element type. 1771 QualType canon; 1772 1773 if (!elementType.isCanonical() || elementType.hasLocalQualifiers()) { 1774 SplitQualType canonSplit = getCanonicalType(elementType).split(); 1775 canon = getIncompleteArrayType(QualType(canonSplit.first, 0), 1776 ASM, elementTypeQuals); 1777 canon = getQualifiedType(canon, canonSplit.second); 1778 1779 // Get the new insert position for the node we care about. 1780 IncompleteArrayType *existing = 1781 IncompleteArrayTypes.FindNodeOrInsertPos(ID, insertPos); 1782 assert(!existing && "Shouldn't be in the map!"); (void) existing; 1783 } 1784 1785 IncompleteArrayType *newType = new (*this, TypeAlignment) 1786 IncompleteArrayType(elementType, canon, ASM, elementTypeQuals); 1787 1788 IncompleteArrayTypes.InsertNode(newType, insertPos); 1789 Types.push_back(newType); 1790 return QualType(newType, 0); 1791} 1792 1793/// getVectorType - Return the unique reference to a vector type of 1794/// the specified element type and size. VectorType must be a built-in type. 1795QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts, 1796 VectorType::VectorKind VecKind) const { 1797 assert(vecType->isBuiltinType()); 1798 1799 // Check if we've already instantiated a vector of this type. 1800 llvm::FoldingSetNodeID ID; 1801 VectorType::Profile(ID, vecType, NumElts, Type::Vector, VecKind); 1802 1803 void *InsertPos = 0; 1804 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1805 return QualType(VTP, 0); 1806 1807 // If the element type isn't canonical, this won't be a canonical type either, 1808 // so fill in the canonical type field. 1809 QualType Canonical; 1810 if (!vecType.isCanonical()) { 1811 Canonical = getVectorType(getCanonicalType(vecType), NumElts, VecKind); 1812 1813 // Get the new insert position for the node we care about. 1814 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1815 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1816 } 1817 VectorType *New = new (*this, TypeAlignment) 1818 VectorType(vecType, NumElts, Canonical, VecKind); 1819 VectorTypes.InsertNode(New, InsertPos); 1820 Types.push_back(New); 1821 return QualType(New, 0); 1822} 1823 1824/// getExtVectorType - Return the unique reference to an extended vector type of 1825/// the specified element type and size. VectorType must be a built-in type. 1826QualType 1827ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) const { 1828 assert(vecType->isBuiltinType()); 1829 1830 // Check if we've already instantiated a vector of this type. 1831 llvm::FoldingSetNodeID ID; 1832 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector, 1833 VectorType::GenericVector); 1834 void *InsertPos = 0; 1835 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1836 return QualType(VTP, 0); 1837 1838 // If the element type isn't canonical, this won't be a canonical type either, 1839 // so fill in the canonical type field. 1840 QualType Canonical; 1841 if (!vecType.isCanonical()) { 1842 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts); 1843 1844 // Get the new insert position for the node we care about. 1845 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1846 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1847 } 1848 ExtVectorType *New = new (*this, TypeAlignment) 1849 ExtVectorType(vecType, NumElts, Canonical); 1850 VectorTypes.InsertNode(New, InsertPos); 1851 Types.push_back(New); 1852 return QualType(New, 0); 1853} 1854 1855QualType 1856ASTContext::getDependentSizedExtVectorType(QualType vecType, 1857 Expr *SizeExpr, 1858 SourceLocation AttrLoc) const { 1859 llvm::FoldingSetNodeID ID; 1860 DependentSizedExtVectorType::Profile(ID, *this, getCanonicalType(vecType), 1861 SizeExpr); 1862 1863 void *InsertPos = 0; 1864 DependentSizedExtVectorType *Canon 1865 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1866 DependentSizedExtVectorType *New; 1867 if (Canon) { 1868 // We already have a canonical version of this array type; use it as 1869 // the canonical type for a newly-built type. 1870 New = new (*this, TypeAlignment) 1871 DependentSizedExtVectorType(*this, vecType, QualType(Canon, 0), 1872 SizeExpr, AttrLoc); 1873 } else { 1874 QualType CanonVecTy = getCanonicalType(vecType); 1875 if (CanonVecTy == vecType) { 1876 New = new (*this, TypeAlignment) 1877 DependentSizedExtVectorType(*this, vecType, QualType(), SizeExpr, 1878 AttrLoc); 1879 1880 DependentSizedExtVectorType *CanonCheck 1881 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1882 assert(!CanonCheck && "Dependent-sized ext_vector canonical type broken"); 1883 (void)CanonCheck; 1884 DependentSizedExtVectorTypes.InsertNode(New, InsertPos); 1885 } else { 1886 QualType Canon = getDependentSizedExtVectorType(CanonVecTy, SizeExpr, 1887 SourceLocation()); 1888 New = new (*this, TypeAlignment) 1889 DependentSizedExtVectorType(*this, vecType, Canon, SizeExpr, AttrLoc); 1890 } 1891 } 1892 1893 Types.push_back(New); 1894 return QualType(New, 0); 1895} 1896 1897/// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 1898/// 1899QualType 1900ASTContext::getFunctionNoProtoType(QualType ResultTy, 1901 const FunctionType::ExtInfo &Info) const { 1902 const CallingConv DefaultCC = Info.getCC(); 1903 const CallingConv CallConv = (LangOpts.MRTD && DefaultCC == CC_Default) ? 1904 CC_X86StdCall : DefaultCC; 1905 // Unique functions, to guarantee there is only one function of a particular 1906 // structure. 1907 llvm::FoldingSetNodeID ID; 1908 FunctionNoProtoType::Profile(ID, ResultTy, Info); 1909 1910 void *InsertPos = 0; 1911 if (FunctionNoProtoType *FT = 1912 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1913 return QualType(FT, 0); 1914 1915 QualType Canonical; 1916 if (!ResultTy.isCanonical() || 1917 getCanonicalCallConv(CallConv) != CallConv) { 1918 Canonical = 1919 getFunctionNoProtoType(getCanonicalType(ResultTy), 1920 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1921 1922 // Get the new insert position for the node we care about. 1923 FunctionNoProtoType *NewIP = 1924 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1925 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1926 } 1927 1928 FunctionProtoType::ExtInfo newInfo = Info.withCallingConv(CallConv); 1929 FunctionNoProtoType *New = new (*this, TypeAlignment) 1930 FunctionNoProtoType(ResultTy, Canonical, newInfo); 1931 Types.push_back(New); 1932 FunctionNoProtoTypes.InsertNode(New, InsertPos); 1933 return QualType(New, 0); 1934} 1935 1936/// getFunctionType - Return a normal function type with a typed argument 1937/// list. isVariadic indicates whether the argument list includes '...'. 1938QualType 1939ASTContext::getFunctionType(QualType ResultTy, 1940 const QualType *ArgArray, unsigned NumArgs, 1941 const FunctionProtoType::ExtProtoInfo &EPI) const { 1942 // Unique functions, to guarantee there is only one function of a particular 1943 // structure. 1944 llvm::FoldingSetNodeID ID; 1945 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, EPI, *this); 1946 1947 void *InsertPos = 0; 1948 if (FunctionProtoType *FTP = 1949 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1950 return QualType(FTP, 0); 1951 1952 // Determine whether the type being created is already canonical or not. 1953 bool isCanonical= EPI.ExceptionSpecType == EST_None && ResultTy.isCanonical(); 1954 for (unsigned i = 0; i != NumArgs && isCanonical; ++i) 1955 if (!ArgArray[i].isCanonicalAsParam()) 1956 isCanonical = false; 1957 1958 const CallingConv DefaultCC = EPI.ExtInfo.getCC(); 1959 const CallingConv CallConv = (LangOpts.MRTD && DefaultCC == CC_Default) ? 1960 CC_X86StdCall : DefaultCC; 1961 1962 // If this type isn't canonical, get the canonical version of it. 1963 // The exception spec is not part of the canonical type. 1964 QualType Canonical; 1965 if (!isCanonical || getCanonicalCallConv(CallConv) != CallConv) { 1966 llvm::SmallVector<QualType, 16> CanonicalArgs; 1967 CanonicalArgs.reserve(NumArgs); 1968 for (unsigned i = 0; i != NumArgs; ++i) 1969 CanonicalArgs.push_back(getCanonicalParamType(ArgArray[i])); 1970 1971 FunctionProtoType::ExtProtoInfo CanonicalEPI = EPI; 1972 CanonicalEPI.ExceptionSpecType = EST_None; 1973 CanonicalEPI.NumExceptions = 0; 1974 CanonicalEPI.ExtInfo 1975 = CanonicalEPI.ExtInfo.withCallingConv(getCanonicalCallConv(CallConv)); 1976 1977 Canonical = getFunctionType(getCanonicalType(ResultTy), 1978 CanonicalArgs.data(), NumArgs, 1979 CanonicalEPI); 1980 1981 // Get the new insert position for the node we care about. 1982 FunctionProtoType *NewIP = 1983 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1984 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1985 } 1986 1987 // FunctionProtoType objects are allocated with extra bytes after them 1988 // for two variable size arrays (for parameter and exception types) at the 1989 // end of them. Instead of the exception types, there could be a noexcept 1990 // expression and a context pointer. 1991 size_t Size = sizeof(FunctionProtoType) + 1992 NumArgs * sizeof(QualType); 1993 if (EPI.ExceptionSpecType == EST_Dynamic) 1994 Size += EPI.NumExceptions * sizeof(QualType); 1995 else if (EPI.ExceptionSpecType == EST_ComputedNoexcept) { 1996 Size += sizeof(Expr*); 1997 } 1998 FunctionProtoType *FTP = (FunctionProtoType*) Allocate(Size, TypeAlignment); 1999 FunctionProtoType::ExtProtoInfo newEPI = EPI; 2000 newEPI.ExtInfo = EPI.ExtInfo.withCallingConv(CallConv); 2001 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, Canonical, newEPI); 2002 Types.push_back(FTP); 2003 FunctionProtoTypes.InsertNode(FTP, InsertPos); 2004 return QualType(FTP, 0); 2005} 2006 2007#ifndef NDEBUG 2008static bool NeedsInjectedClassNameType(const RecordDecl *D) { 2009 if (!isa<CXXRecordDecl>(D)) return false; 2010 const CXXRecordDecl *RD = cast<CXXRecordDecl>(D); 2011 if (isa<ClassTemplatePartialSpecializationDecl>(RD)) 2012 return true; 2013 if (RD->getDescribedClassTemplate() && 2014 !isa<ClassTemplateSpecializationDecl>(RD)) 2015 return true; 2016 return false; 2017} 2018#endif 2019 2020/// getInjectedClassNameType - Return the unique reference to the 2021/// injected class name type for the specified templated declaration. 2022QualType ASTContext::getInjectedClassNameType(CXXRecordDecl *Decl, 2023 QualType TST) const { 2024 assert(NeedsInjectedClassNameType(Decl)); 2025 if (Decl->TypeForDecl) { 2026 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 2027 } else if (CXXRecordDecl *PrevDecl = Decl->getPreviousDeclaration()) { 2028 assert(PrevDecl->TypeForDecl && "previous declaration has no type"); 2029 Decl->TypeForDecl = PrevDecl->TypeForDecl; 2030 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 2031 } else { 2032 Type *newType = 2033 new (*this, TypeAlignment) InjectedClassNameType(Decl, TST); 2034 Decl->TypeForDecl = newType; 2035 Types.push_back(newType); 2036 } 2037 return QualType(Decl->TypeForDecl, 0); 2038} 2039 2040/// getTypeDeclType - Return the unique reference to the type for the 2041/// specified type declaration. 2042QualType ASTContext::getTypeDeclTypeSlow(const TypeDecl *Decl) const { 2043 assert(Decl && "Passed null for Decl param"); 2044 assert(!Decl->TypeForDecl && "TypeForDecl present in slow case"); 2045 2046 if (const TypedefNameDecl *Typedef = dyn_cast<TypedefNameDecl>(Decl)) 2047 return getTypedefType(Typedef); 2048 2049 assert(!isa<TemplateTypeParmDecl>(Decl) && 2050 "Template type parameter types are always available."); 2051 2052 if (const RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) { 2053 assert(!Record->getPreviousDeclaration() && 2054 "struct/union has previous declaration"); 2055 assert(!NeedsInjectedClassNameType(Record)); 2056 return getRecordType(Record); 2057 } else if (const EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) { 2058 assert(!Enum->getPreviousDeclaration() && 2059 "enum has previous declaration"); 2060 return getEnumType(Enum); 2061 } else if (const UnresolvedUsingTypenameDecl *Using = 2062 dyn_cast<UnresolvedUsingTypenameDecl>(Decl)) { 2063 Type *newType = new (*this, TypeAlignment) UnresolvedUsingType(Using); 2064 Decl->TypeForDecl = newType; 2065 Types.push_back(newType); 2066 } else 2067 llvm_unreachable("TypeDecl without a type?"); 2068 2069 return QualType(Decl->TypeForDecl, 0); 2070} 2071 2072/// getTypedefType - Return the unique reference to the type for the 2073/// specified typedef name decl. 2074QualType 2075ASTContext::getTypedefType(const TypedefNameDecl *Decl, 2076 QualType Canonical) const { 2077 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2078 2079 if (Canonical.isNull()) 2080 Canonical = getCanonicalType(Decl->getUnderlyingType()); 2081 TypedefType *newType = new(*this, TypeAlignment) 2082 TypedefType(Type::Typedef, Decl, Canonical); 2083 Decl->TypeForDecl = newType; 2084 Types.push_back(newType); 2085 return QualType(newType, 0); 2086} 2087 2088QualType ASTContext::getRecordType(const RecordDecl *Decl) const { 2089 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2090 2091 if (const RecordDecl *PrevDecl = Decl->getPreviousDeclaration()) 2092 if (PrevDecl->TypeForDecl) 2093 return QualType(Decl->TypeForDecl = PrevDecl->TypeForDecl, 0); 2094 2095 RecordType *newType = new (*this, TypeAlignment) RecordType(Decl); 2096 Decl->TypeForDecl = newType; 2097 Types.push_back(newType); 2098 return QualType(newType, 0); 2099} 2100 2101QualType ASTContext::getEnumType(const EnumDecl *Decl) const { 2102 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2103 2104 if (const EnumDecl *PrevDecl = Decl->getPreviousDeclaration()) 2105 if (PrevDecl->TypeForDecl) 2106 return QualType(Decl->TypeForDecl = PrevDecl->TypeForDecl, 0); 2107 2108 EnumType *newType = new (*this, TypeAlignment) EnumType(Decl); 2109 Decl->TypeForDecl = newType; 2110 Types.push_back(newType); 2111 return QualType(newType, 0); 2112} 2113 2114QualType ASTContext::getAttributedType(AttributedType::Kind attrKind, 2115 QualType modifiedType, 2116 QualType equivalentType) { 2117 llvm::FoldingSetNodeID id; 2118 AttributedType::Profile(id, attrKind, modifiedType, equivalentType); 2119 2120 void *insertPos = 0; 2121 AttributedType *type = AttributedTypes.FindNodeOrInsertPos(id, insertPos); 2122 if (type) return QualType(type, 0); 2123 2124 QualType canon = getCanonicalType(equivalentType); 2125 type = new (*this, TypeAlignment) 2126 AttributedType(canon, attrKind, modifiedType, equivalentType); 2127 2128 Types.push_back(type); 2129 AttributedTypes.InsertNode(type, insertPos); 2130 2131 return QualType(type, 0); 2132} 2133 2134 2135/// \brief Retrieve a substitution-result type. 2136QualType 2137ASTContext::getSubstTemplateTypeParmType(const TemplateTypeParmType *Parm, 2138 QualType Replacement) const { 2139 assert(Replacement.isCanonical() 2140 && "replacement types must always be canonical"); 2141 2142 llvm::FoldingSetNodeID ID; 2143 SubstTemplateTypeParmType::Profile(ID, Parm, Replacement); 2144 void *InsertPos = 0; 2145 SubstTemplateTypeParmType *SubstParm 2146 = SubstTemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2147 2148 if (!SubstParm) { 2149 SubstParm = new (*this, TypeAlignment) 2150 SubstTemplateTypeParmType(Parm, Replacement); 2151 Types.push_back(SubstParm); 2152 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 2153 } 2154 2155 return QualType(SubstParm, 0); 2156} 2157 2158/// \brief Retrieve a 2159QualType ASTContext::getSubstTemplateTypeParmPackType( 2160 const TemplateTypeParmType *Parm, 2161 const TemplateArgument &ArgPack) { 2162#ifndef NDEBUG 2163 for (TemplateArgument::pack_iterator P = ArgPack.pack_begin(), 2164 PEnd = ArgPack.pack_end(); 2165 P != PEnd; ++P) { 2166 assert(P->getKind() == TemplateArgument::Type &&"Pack contains a non-type"); 2167 assert(P->getAsType().isCanonical() && "Pack contains non-canonical type"); 2168 } 2169#endif 2170 2171 llvm::FoldingSetNodeID ID; 2172 SubstTemplateTypeParmPackType::Profile(ID, Parm, ArgPack); 2173 void *InsertPos = 0; 2174 if (SubstTemplateTypeParmPackType *SubstParm 2175 = SubstTemplateTypeParmPackTypes.FindNodeOrInsertPos(ID, InsertPos)) 2176 return QualType(SubstParm, 0); 2177 2178 QualType Canon; 2179 if (!Parm->isCanonicalUnqualified()) { 2180 Canon = getCanonicalType(QualType(Parm, 0)); 2181 Canon = getSubstTemplateTypeParmPackType(cast<TemplateTypeParmType>(Canon), 2182 ArgPack); 2183 SubstTemplateTypeParmPackTypes.FindNodeOrInsertPos(ID, InsertPos); 2184 } 2185 2186 SubstTemplateTypeParmPackType *SubstParm 2187 = new (*this, TypeAlignment) SubstTemplateTypeParmPackType(Parm, Canon, 2188 ArgPack); 2189 Types.push_back(SubstParm); 2190 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 2191 return QualType(SubstParm, 0); 2192} 2193 2194/// \brief Retrieve the template type parameter type for a template 2195/// parameter or parameter pack with the given depth, index, and (optionally) 2196/// name. 2197QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index, 2198 bool ParameterPack, 2199 IdentifierInfo *Name) const { 2200 llvm::FoldingSetNodeID ID; 2201 TemplateTypeParmType::Profile(ID, Depth, Index, ParameterPack, Name); 2202 void *InsertPos = 0; 2203 TemplateTypeParmType *TypeParm 2204 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2205 2206 if (TypeParm) 2207 return QualType(TypeParm, 0); 2208 2209 if (Name) { 2210 QualType Canon = getTemplateTypeParmType(Depth, Index, ParameterPack); 2211 TypeParm = new (*this, TypeAlignment) 2212 TemplateTypeParmType(Depth, Index, ParameterPack, Name, Canon); 2213 2214 TemplateTypeParmType *TypeCheck 2215 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2216 assert(!TypeCheck && "Template type parameter canonical type broken"); 2217 (void)TypeCheck; 2218 } else 2219 TypeParm = new (*this, TypeAlignment) 2220 TemplateTypeParmType(Depth, Index, ParameterPack); 2221 2222 Types.push_back(TypeParm); 2223 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos); 2224 2225 return QualType(TypeParm, 0); 2226} 2227 2228TypeSourceInfo * 2229ASTContext::getTemplateSpecializationTypeInfo(TemplateName Name, 2230 SourceLocation NameLoc, 2231 const TemplateArgumentListInfo &Args, 2232 QualType CanonType) const { 2233 assert(!Name.getAsDependentTemplateName() && 2234 "No dependent template names here!"); 2235 QualType TST = getTemplateSpecializationType(Name, Args, CanonType); 2236 2237 TypeSourceInfo *DI = CreateTypeSourceInfo(TST); 2238 TemplateSpecializationTypeLoc TL 2239 = cast<TemplateSpecializationTypeLoc>(DI->getTypeLoc()); 2240 TL.setTemplateNameLoc(NameLoc); 2241 TL.setLAngleLoc(Args.getLAngleLoc()); 2242 TL.setRAngleLoc(Args.getRAngleLoc()); 2243 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 2244 TL.setArgLocInfo(i, Args[i].getLocInfo()); 2245 return DI; 2246} 2247 2248QualType 2249ASTContext::getTemplateSpecializationType(TemplateName Template, 2250 const TemplateArgumentListInfo &Args, 2251 QualType Canon) const { 2252 assert(!Template.getAsDependentTemplateName() && 2253 "No dependent template names here!"); 2254 2255 unsigned NumArgs = Args.size(); 2256 2257 llvm::SmallVector<TemplateArgument, 4> ArgVec; 2258 ArgVec.reserve(NumArgs); 2259 for (unsigned i = 0; i != NumArgs; ++i) 2260 ArgVec.push_back(Args[i].getArgument()); 2261 2262 return getTemplateSpecializationType(Template, ArgVec.data(), NumArgs, 2263 Canon); 2264} 2265 2266QualType 2267ASTContext::getTemplateSpecializationType(TemplateName Template, 2268 const TemplateArgument *Args, 2269 unsigned NumArgs, 2270 QualType Canon) const { 2271 assert(!Template.getAsDependentTemplateName() && 2272 "No dependent template names here!"); 2273 // Look through qualified template names. 2274 if (QualifiedTemplateName *QTN = Template.getAsQualifiedTemplateName()) 2275 Template = TemplateName(QTN->getTemplateDecl()); 2276 2277 if (!Canon.isNull()) 2278 Canon = getCanonicalType(Canon); 2279 else 2280 Canon = getCanonicalTemplateSpecializationType(Template, Args, NumArgs); 2281 2282 // Allocate the (non-canonical) template specialization type, but don't 2283 // try to unique it: these types typically have location information that 2284 // we don't unique and don't want to lose. 2285 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 2286 sizeof(TemplateArgument) * NumArgs), 2287 TypeAlignment); 2288 TemplateSpecializationType *Spec 2289 = new (Mem) TemplateSpecializationType(Template, 2290 Args, NumArgs, 2291 Canon); 2292 2293 Types.push_back(Spec); 2294 return QualType(Spec, 0); 2295} 2296 2297QualType 2298ASTContext::getCanonicalTemplateSpecializationType(TemplateName Template, 2299 const TemplateArgument *Args, 2300 unsigned NumArgs) const { 2301 assert(!Template.getAsDependentTemplateName() && 2302 "No dependent template names here!"); 2303 // Look through qualified template names. 2304 if (QualifiedTemplateName *QTN = Template.getAsQualifiedTemplateName()) 2305 Template = TemplateName(QTN->getTemplateDecl()); 2306 2307 // Build the canonical template specialization type. 2308 TemplateName CanonTemplate = getCanonicalTemplateName(Template); 2309 llvm::SmallVector<TemplateArgument, 4> CanonArgs; 2310 CanonArgs.reserve(NumArgs); 2311 for (unsigned I = 0; I != NumArgs; ++I) 2312 CanonArgs.push_back(getCanonicalTemplateArgument(Args[I])); 2313 2314 // Determine whether this canonical template specialization type already 2315 // exists. 2316 llvm::FoldingSetNodeID ID; 2317 TemplateSpecializationType::Profile(ID, CanonTemplate, 2318 CanonArgs.data(), NumArgs, *this); 2319 2320 void *InsertPos = 0; 2321 TemplateSpecializationType *Spec 2322 = TemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2323 2324 if (!Spec) { 2325 // Allocate a new canonical template specialization type. 2326 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 2327 sizeof(TemplateArgument) * NumArgs), 2328 TypeAlignment); 2329 Spec = new (Mem) TemplateSpecializationType(CanonTemplate, 2330 CanonArgs.data(), NumArgs, 2331 QualType()); 2332 Types.push_back(Spec); 2333 TemplateSpecializationTypes.InsertNode(Spec, InsertPos); 2334 } 2335 2336 assert(Spec->isDependentType() && 2337 "Non-dependent template-id type must have a canonical type"); 2338 return QualType(Spec, 0); 2339} 2340 2341QualType 2342ASTContext::getElaboratedType(ElaboratedTypeKeyword Keyword, 2343 NestedNameSpecifier *NNS, 2344 QualType NamedType) const { 2345 llvm::FoldingSetNodeID ID; 2346 ElaboratedType::Profile(ID, Keyword, NNS, NamedType); 2347 2348 void *InsertPos = 0; 2349 ElaboratedType *T = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2350 if (T) 2351 return QualType(T, 0); 2352 2353 QualType Canon = NamedType; 2354 if (!Canon.isCanonical()) { 2355 Canon = getCanonicalType(NamedType); 2356 ElaboratedType *CheckT = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2357 assert(!CheckT && "Elaborated canonical type broken"); 2358 (void)CheckT; 2359 } 2360 2361 T = new (*this) ElaboratedType(Keyword, NNS, NamedType, Canon); 2362 Types.push_back(T); 2363 ElaboratedTypes.InsertNode(T, InsertPos); 2364 return QualType(T, 0); 2365} 2366 2367QualType 2368ASTContext::getParenType(QualType InnerType) const { 2369 llvm::FoldingSetNodeID ID; 2370 ParenType::Profile(ID, InnerType); 2371 2372 void *InsertPos = 0; 2373 ParenType *T = ParenTypes.FindNodeOrInsertPos(ID, InsertPos); 2374 if (T) 2375 return QualType(T, 0); 2376 2377 QualType Canon = InnerType; 2378 if (!Canon.isCanonical()) { 2379 Canon = getCanonicalType(InnerType); 2380 ParenType *CheckT = ParenTypes.FindNodeOrInsertPos(ID, InsertPos); 2381 assert(!CheckT && "Paren canonical type broken"); 2382 (void)CheckT; 2383 } 2384 2385 T = new (*this) ParenType(InnerType, Canon); 2386 Types.push_back(T); 2387 ParenTypes.InsertNode(T, InsertPos); 2388 return QualType(T, 0); 2389} 2390 2391QualType ASTContext::getDependentNameType(ElaboratedTypeKeyword Keyword, 2392 NestedNameSpecifier *NNS, 2393 const IdentifierInfo *Name, 2394 QualType Canon) const { 2395 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 2396 2397 if (Canon.isNull()) { 2398 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2399 ElaboratedTypeKeyword CanonKeyword = Keyword; 2400 if (Keyword == ETK_None) 2401 CanonKeyword = ETK_Typename; 2402 2403 if (CanonNNS != NNS || CanonKeyword != Keyword) 2404 Canon = getDependentNameType(CanonKeyword, CanonNNS, Name); 2405 } 2406 2407 llvm::FoldingSetNodeID ID; 2408 DependentNameType::Profile(ID, Keyword, NNS, Name); 2409 2410 void *InsertPos = 0; 2411 DependentNameType *T 2412 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 2413 if (T) 2414 return QualType(T, 0); 2415 2416 T = new (*this) DependentNameType(Keyword, NNS, Name, Canon); 2417 Types.push_back(T); 2418 DependentNameTypes.InsertNode(T, InsertPos); 2419 return QualType(T, 0); 2420} 2421 2422QualType 2423ASTContext::getDependentTemplateSpecializationType( 2424 ElaboratedTypeKeyword Keyword, 2425 NestedNameSpecifier *NNS, 2426 const IdentifierInfo *Name, 2427 const TemplateArgumentListInfo &Args) const { 2428 // TODO: avoid this copy 2429 llvm::SmallVector<TemplateArgument, 16> ArgCopy; 2430 for (unsigned I = 0, E = Args.size(); I != E; ++I) 2431 ArgCopy.push_back(Args[I].getArgument()); 2432 return getDependentTemplateSpecializationType(Keyword, NNS, Name, 2433 ArgCopy.size(), 2434 ArgCopy.data()); 2435} 2436 2437QualType 2438ASTContext::getDependentTemplateSpecializationType( 2439 ElaboratedTypeKeyword Keyword, 2440 NestedNameSpecifier *NNS, 2441 const IdentifierInfo *Name, 2442 unsigned NumArgs, 2443 const TemplateArgument *Args) const { 2444 assert((!NNS || NNS->isDependent()) && 2445 "nested-name-specifier must be dependent"); 2446 2447 llvm::FoldingSetNodeID ID; 2448 DependentTemplateSpecializationType::Profile(ID, *this, Keyword, NNS, 2449 Name, NumArgs, Args); 2450 2451 void *InsertPos = 0; 2452 DependentTemplateSpecializationType *T 2453 = DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2454 if (T) 2455 return QualType(T, 0); 2456 2457 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2458 2459 ElaboratedTypeKeyword CanonKeyword = Keyword; 2460 if (Keyword == ETK_None) CanonKeyword = ETK_Typename; 2461 2462 bool AnyNonCanonArgs = false; 2463 llvm::SmallVector<TemplateArgument, 16> CanonArgs(NumArgs); 2464 for (unsigned I = 0; I != NumArgs; ++I) { 2465 CanonArgs[I] = getCanonicalTemplateArgument(Args[I]); 2466 if (!CanonArgs[I].structurallyEquals(Args[I])) 2467 AnyNonCanonArgs = true; 2468 } 2469 2470 QualType Canon; 2471 if (AnyNonCanonArgs || CanonNNS != NNS || CanonKeyword != Keyword) { 2472 Canon = getDependentTemplateSpecializationType(CanonKeyword, CanonNNS, 2473 Name, NumArgs, 2474 CanonArgs.data()); 2475 2476 // Find the insert position again. 2477 DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2478 } 2479 2480 void *Mem = Allocate((sizeof(DependentTemplateSpecializationType) + 2481 sizeof(TemplateArgument) * NumArgs), 2482 TypeAlignment); 2483 T = new (Mem) DependentTemplateSpecializationType(Keyword, NNS, 2484 Name, NumArgs, Args, Canon); 2485 Types.push_back(T); 2486 DependentTemplateSpecializationTypes.InsertNode(T, InsertPos); 2487 return QualType(T, 0); 2488} 2489 2490QualType ASTContext::getPackExpansionType(QualType Pattern, 2491 llvm::Optional<unsigned> NumExpansions) { 2492 llvm::FoldingSetNodeID ID; 2493 PackExpansionType::Profile(ID, Pattern, NumExpansions); 2494 2495 assert(Pattern->containsUnexpandedParameterPack() && 2496 "Pack expansions must expand one or more parameter packs"); 2497 void *InsertPos = 0; 2498 PackExpansionType *T 2499 = PackExpansionTypes.FindNodeOrInsertPos(ID, InsertPos); 2500 if (T) 2501 return QualType(T, 0); 2502 2503 QualType Canon; 2504 if (!Pattern.isCanonical()) { 2505 Canon = getPackExpansionType(getCanonicalType(Pattern), NumExpansions); 2506 2507 // Find the insert position again. 2508 PackExpansionTypes.FindNodeOrInsertPos(ID, InsertPos); 2509 } 2510 2511 T = new (*this) PackExpansionType(Pattern, Canon, NumExpansions); 2512 Types.push_back(T); 2513 PackExpansionTypes.InsertNode(T, InsertPos); 2514 return QualType(T, 0); 2515} 2516 2517/// CmpProtocolNames - Comparison predicate for sorting protocols 2518/// alphabetically. 2519static bool CmpProtocolNames(const ObjCProtocolDecl *LHS, 2520 const ObjCProtocolDecl *RHS) { 2521 return LHS->getDeclName() < RHS->getDeclName(); 2522} 2523 2524static bool areSortedAndUniqued(ObjCProtocolDecl * const *Protocols, 2525 unsigned NumProtocols) { 2526 if (NumProtocols == 0) return true; 2527 2528 for (unsigned i = 1; i != NumProtocols; ++i) 2529 if (!CmpProtocolNames(Protocols[i-1], Protocols[i])) 2530 return false; 2531 return true; 2532} 2533 2534static void SortAndUniqueProtocols(ObjCProtocolDecl **Protocols, 2535 unsigned &NumProtocols) { 2536 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols; 2537 2538 // Sort protocols, keyed by name. 2539 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames); 2540 2541 // Remove duplicates. 2542 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd); 2543 NumProtocols = ProtocolsEnd-Protocols; 2544} 2545 2546QualType ASTContext::getObjCObjectType(QualType BaseType, 2547 ObjCProtocolDecl * const *Protocols, 2548 unsigned NumProtocols) const { 2549 // If the base type is an interface and there aren't any protocols 2550 // to add, then the interface type will do just fine. 2551 if (!NumProtocols && isa<ObjCInterfaceType>(BaseType)) 2552 return BaseType; 2553 2554 // Look in the folding set for an existing type. 2555 llvm::FoldingSetNodeID ID; 2556 ObjCObjectTypeImpl::Profile(ID, BaseType, Protocols, NumProtocols); 2557 void *InsertPos = 0; 2558 if (ObjCObjectType *QT = ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos)) 2559 return QualType(QT, 0); 2560 2561 // Build the canonical type, which has the canonical base type and 2562 // a sorted-and-uniqued list of protocols. 2563 QualType Canonical; 2564 bool ProtocolsSorted = areSortedAndUniqued(Protocols, NumProtocols); 2565 if (!ProtocolsSorted || !BaseType.isCanonical()) { 2566 if (!ProtocolsSorted) { 2567 llvm::SmallVector<ObjCProtocolDecl*, 8> Sorted(Protocols, 2568 Protocols + NumProtocols); 2569 unsigned UniqueCount = NumProtocols; 2570 2571 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2572 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2573 &Sorted[0], UniqueCount); 2574 } else { 2575 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2576 Protocols, NumProtocols); 2577 } 2578 2579 // Regenerate InsertPos. 2580 ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos); 2581 } 2582 2583 unsigned Size = sizeof(ObjCObjectTypeImpl); 2584 Size += NumProtocols * sizeof(ObjCProtocolDecl *); 2585 void *Mem = Allocate(Size, TypeAlignment); 2586 ObjCObjectTypeImpl *T = 2587 new (Mem) ObjCObjectTypeImpl(Canonical, BaseType, Protocols, NumProtocols); 2588 2589 Types.push_back(T); 2590 ObjCObjectTypes.InsertNode(T, InsertPos); 2591 return QualType(T, 0); 2592} 2593 2594/// getObjCObjectPointerType - Return a ObjCObjectPointerType type for 2595/// the given object type. 2596QualType ASTContext::getObjCObjectPointerType(QualType ObjectT) const { 2597 llvm::FoldingSetNodeID ID; 2598 ObjCObjectPointerType::Profile(ID, ObjectT); 2599 2600 void *InsertPos = 0; 2601 if (ObjCObjectPointerType *QT = 2602 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 2603 return QualType(QT, 0); 2604 2605 // Find the canonical object type. 2606 QualType Canonical; 2607 if (!ObjectT.isCanonical()) { 2608 Canonical = getObjCObjectPointerType(getCanonicalType(ObjectT)); 2609 2610 // Regenerate InsertPos. 2611 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 2612 } 2613 2614 // No match. 2615 void *Mem = Allocate(sizeof(ObjCObjectPointerType), TypeAlignment); 2616 ObjCObjectPointerType *QType = 2617 new (Mem) ObjCObjectPointerType(Canonical, ObjectT); 2618 2619 Types.push_back(QType); 2620 ObjCObjectPointerTypes.InsertNode(QType, InsertPos); 2621 return QualType(QType, 0); 2622} 2623 2624/// getObjCInterfaceType - Return the unique reference to the type for the 2625/// specified ObjC interface decl. The list of protocols is optional. 2626QualType ASTContext::getObjCInterfaceType(const ObjCInterfaceDecl *Decl) const { 2627 if (Decl->TypeForDecl) 2628 return QualType(Decl->TypeForDecl, 0); 2629 2630 // FIXME: redeclarations? 2631 void *Mem = Allocate(sizeof(ObjCInterfaceType), TypeAlignment); 2632 ObjCInterfaceType *T = new (Mem) ObjCInterfaceType(Decl); 2633 Decl->TypeForDecl = T; 2634 Types.push_back(T); 2635 return QualType(T, 0); 2636} 2637 2638/// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique 2639/// TypeOfExprType AST's (since expression's are never shared). For example, 2640/// multiple declarations that refer to "typeof(x)" all contain different 2641/// DeclRefExpr's. This doesn't effect the type checker, since it operates 2642/// on canonical type's (which are always unique). 2643QualType ASTContext::getTypeOfExprType(Expr *tofExpr) const { 2644 TypeOfExprType *toe; 2645 if (tofExpr->isTypeDependent()) { 2646 llvm::FoldingSetNodeID ID; 2647 DependentTypeOfExprType::Profile(ID, *this, tofExpr); 2648 2649 void *InsertPos = 0; 2650 DependentTypeOfExprType *Canon 2651 = DependentTypeOfExprTypes.FindNodeOrInsertPos(ID, InsertPos); 2652 if (Canon) { 2653 // We already have a "canonical" version of an identical, dependent 2654 // typeof(expr) type. Use that as our canonical type. 2655 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, 2656 QualType((TypeOfExprType*)Canon, 0)); 2657 } 2658 else { 2659 // Build a new, canonical typeof(expr) type. 2660 Canon 2661 = new (*this, TypeAlignment) DependentTypeOfExprType(*this, tofExpr); 2662 DependentTypeOfExprTypes.InsertNode(Canon, InsertPos); 2663 toe = Canon; 2664 } 2665 } else { 2666 QualType Canonical = getCanonicalType(tofExpr->getType()); 2667 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, Canonical); 2668 } 2669 Types.push_back(toe); 2670 return QualType(toe, 0); 2671} 2672 2673/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique 2674/// TypeOfType AST's. The only motivation to unique these nodes would be 2675/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be 2676/// an issue. This doesn't effect the type checker, since it operates 2677/// on canonical type's (which are always unique). 2678QualType ASTContext::getTypeOfType(QualType tofType) const { 2679 QualType Canonical = getCanonicalType(tofType); 2680 TypeOfType *tot = new (*this, TypeAlignment) TypeOfType(tofType, Canonical); 2681 Types.push_back(tot); 2682 return QualType(tot, 0); 2683} 2684 2685/// getDecltypeForExpr - Given an expr, will return the decltype for that 2686/// expression, according to the rules in C++0x [dcl.type.simple]p4 2687static QualType getDecltypeForExpr(const Expr *e, const ASTContext &Context) { 2688 if (e->isTypeDependent()) 2689 return Context.DependentTy; 2690 2691 // If e is an id expression or a class member access, decltype(e) is defined 2692 // as the type of the entity named by e. 2693 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(e)) { 2694 if (const ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl())) 2695 return VD->getType(); 2696 } 2697 if (const MemberExpr *ME = dyn_cast<MemberExpr>(e)) { 2698 if (const FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) 2699 return FD->getType(); 2700 } 2701 // If e is a function call or an invocation of an overloaded operator, 2702 // (parentheses around e are ignored), decltype(e) is defined as the 2703 // return type of that function. 2704 if (const CallExpr *CE = dyn_cast<CallExpr>(e->IgnoreParens())) 2705 return CE->getCallReturnType(); 2706 2707 QualType T = e->getType(); 2708 2709 // Otherwise, where T is the type of e, if e is an lvalue, decltype(e) is 2710 // defined as T&, otherwise decltype(e) is defined as T. 2711 if (e->isLValue()) 2712 T = Context.getLValueReferenceType(T); 2713 2714 return T; 2715} 2716 2717/// getDecltypeType - Unlike many "get<Type>" functions, we don't unique 2718/// DecltypeType AST's. The only motivation to unique these nodes would be 2719/// memory savings. Since decltype(t) is fairly uncommon, space shouldn't be 2720/// an issue. This doesn't effect the type checker, since it operates 2721/// on canonical type's (which are always unique). 2722QualType ASTContext::getDecltypeType(Expr *e) const { 2723 DecltypeType *dt; 2724 if (e->isTypeDependent()) { 2725 llvm::FoldingSetNodeID ID; 2726 DependentDecltypeType::Profile(ID, *this, e); 2727 2728 void *InsertPos = 0; 2729 DependentDecltypeType *Canon 2730 = DependentDecltypeTypes.FindNodeOrInsertPos(ID, InsertPos); 2731 if (Canon) { 2732 // We already have a "canonical" version of an equivalent, dependent 2733 // decltype type. Use that as our canonical type. 2734 dt = new (*this, TypeAlignment) DecltypeType(e, DependentTy, 2735 QualType((DecltypeType*)Canon, 0)); 2736 } 2737 else { 2738 // Build a new, canonical typeof(expr) type. 2739 Canon = new (*this, TypeAlignment) DependentDecltypeType(*this, e); 2740 DependentDecltypeTypes.InsertNode(Canon, InsertPos); 2741 dt = Canon; 2742 } 2743 } else { 2744 QualType T = getDecltypeForExpr(e, *this); 2745 dt = new (*this, TypeAlignment) DecltypeType(e, T, getCanonicalType(T)); 2746 } 2747 Types.push_back(dt); 2748 return QualType(dt, 0); 2749} 2750 2751/// getAutoType - We only unique auto types after they've been deduced. 2752QualType ASTContext::getAutoType(QualType DeducedType) const { 2753 void *InsertPos = 0; 2754 if (!DeducedType.isNull()) { 2755 // Look in the folding set for an existing type. 2756 llvm::FoldingSetNodeID ID; 2757 AutoType::Profile(ID, DeducedType); 2758 if (AutoType *AT = AutoTypes.FindNodeOrInsertPos(ID, InsertPos)) 2759 return QualType(AT, 0); 2760 } 2761 2762 AutoType *AT = new (*this, TypeAlignment) AutoType(DeducedType); 2763 Types.push_back(AT); 2764 if (InsertPos) 2765 AutoTypes.InsertNode(AT, InsertPos); 2766 return QualType(AT, 0); 2767} 2768 2769/// getAutoDeductType - Get type pattern for deducing against 'auto'. 2770QualType ASTContext::getAutoDeductType() const { 2771 if (AutoDeductTy.isNull()) 2772 AutoDeductTy = getAutoType(QualType()); 2773 assert(!AutoDeductTy.isNull() && "can't build 'auto' pattern"); 2774 return AutoDeductTy; 2775} 2776 2777/// getAutoRRefDeductType - Get type pattern for deducing against 'auto &&'. 2778QualType ASTContext::getAutoRRefDeductType() const { 2779 if (AutoRRefDeductTy.isNull()) 2780 AutoRRefDeductTy = getRValueReferenceType(getAutoDeductType()); 2781 assert(!AutoRRefDeductTy.isNull() && "can't build 'auto &&' pattern"); 2782 return AutoRRefDeductTy; 2783} 2784 2785/// getTagDeclType - Return the unique reference to the type for the 2786/// specified TagDecl (struct/union/class/enum) decl. 2787QualType ASTContext::getTagDeclType(const TagDecl *Decl) const { 2788 assert (Decl); 2789 // FIXME: What is the design on getTagDeclType when it requires casting 2790 // away const? mutable? 2791 return getTypeDeclType(const_cast<TagDecl*>(Decl)); 2792} 2793 2794/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result 2795/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and 2796/// needs to agree with the definition in <stddef.h>. 2797CanQualType ASTContext::getSizeType() const { 2798 return getFromTargetType(Target.getSizeType()); 2799} 2800 2801/// getSignedWCharType - Return the type of "signed wchar_t". 2802/// Used when in C++, as a GCC extension. 2803QualType ASTContext::getSignedWCharType() const { 2804 // FIXME: derive from "Target" ? 2805 return WCharTy; 2806} 2807 2808/// getUnsignedWCharType - Return the type of "unsigned wchar_t". 2809/// Used when in C++, as a GCC extension. 2810QualType ASTContext::getUnsignedWCharType() const { 2811 // FIXME: derive from "Target" ? 2812 return UnsignedIntTy; 2813} 2814 2815/// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 2816/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 2817QualType ASTContext::getPointerDiffType() const { 2818 return getFromTargetType(Target.getPtrDiffType(0)); 2819} 2820 2821//===----------------------------------------------------------------------===// 2822// Type Operators 2823//===----------------------------------------------------------------------===// 2824 2825CanQualType ASTContext::getCanonicalParamType(QualType T) const { 2826 // Push qualifiers into arrays, and then discard any remaining 2827 // qualifiers. 2828 T = getCanonicalType(T); 2829 T = getVariableArrayDecayedType(T); 2830 const Type *Ty = T.getTypePtr(); 2831 QualType Result; 2832 if (isa<ArrayType>(Ty)) { 2833 Result = getArrayDecayedType(QualType(Ty,0)); 2834 } else if (isa<FunctionType>(Ty)) { 2835 Result = getPointerType(QualType(Ty, 0)); 2836 } else { 2837 Result = QualType(Ty, 0); 2838 } 2839 2840 return CanQualType::CreateUnsafe(Result); 2841} 2842 2843 2844QualType ASTContext::getUnqualifiedArrayType(QualType type, 2845 Qualifiers &quals) { 2846 SplitQualType splitType = type.getSplitUnqualifiedType(); 2847 2848 // FIXME: getSplitUnqualifiedType() actually walks all the way to 2849 // the unqualified desugared type and then drops it on the floor. 2850 // We then have to strip that sugar back off with 2851 // getUnqualifiedDesugaredType(), which is silly. 2852 const ArrayType *AT = 2853 dyn_cast<ArrayType>(splitType.first->getUnqualifiedDesugaredType()); 2854 2855 // If we don't have an array, just use the results in splitType. 2856 if (!AT) { 2857 quals = splitType.second; 2858 return QualType(splitType.first, 0); 2859 } 2860 2861 // Otherwise, recurse on the array's element type. 2862 QualType elementType = AT->getElementType(); 2863 QualType unqualElementType = getUnqualifiedArrayType(elementType, quals); 2864 2865 // If that didn't change the element type, AT has no qualifiers, so we 2866 // can just use the results in splitType. 2867 if (elementType == unqualElementType) { 2868 assert(quals.empty()); // from the recursive call 2869 quals = splitType.second; 2870 return QualType(splitType.first, 0); 2871 } 2872 2873 // Otherwise, add in the qualifiers from the outermost type, then 2874 // build the type back up. 2875 quals.addConsistentQualifiers(splitType.second); 2876 2877 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) { 2878 return getConstantArrayType(unqualElementType, CAT->getSize(), 2879 CAT->getSizeModifier(), 0); 2880 } 2881 2882 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) { 2883 return getIncompleteArrayType(unqualElementType, IAT->getSizeModifier(), 0); 2884 } 2885 2886 if (const VariableArrayType *VAT = dyn_cast<VariableArrayType>(AT)) { 2887 return getVariableArrayType(unqualElementType, 2888 VAT->getSizeExpr(), 2889 VAT->getSizeModifier(), 2890 VAT->getIndexTypeCVRQualifiers(), 2891 VAT->getBracketsRange()); 2892 } 2893 2894 const DependentSizedArrayType *DSAT = cast<DependentSizedArrayType>(AT); 2895 return getDependentSizedArrayType(unqualElementType, DSAT->getSizeExpr(), 2896 DSAT->getSizeModifier(), 0, 2897 SourceRange()); 2898} 2899 2900/// UnwrapSimilarPointerTypes - If T1 and T2 are pointer types that 2901/// may be similar (C++ 4.4), replaces T1 and T2 with the type that 2902/// they point to and return true. If T1 and T2 aren't pointer types 2903/// or pointer-to-member types, or if they are not similar at this 2904/// level, returns false and leaves T1 and T2 unchanged. Top-level 2905/// qualifiers on T1 and T2 are ignored. This function will typically 2906/// be called in a loop that successively "unwraps" pointer and 2907/// pointer-to-member types to compare them at each level. 2908bool ASTContext::UnwrapSimilarPointerTypes(QualType &T1, QualType &T2) { 2909 const PointerType *T1PtrType = T1->getAs<PointerType>(), 2910 *T2PtrType = T2->getAs<PointerType>(); 2911 if (T1PtrType && T2PtrType) { 2912 T1 = T1PtrType->getPointeeType(); 2913 T2 = T2PtrType->getPointeeType(); 2914 return true; 2915 } 2916 2917 const MemberPointerType *T1MPType = T1->getAs<MemberPointerType>(), 2918 *T2MPType = T2->getAs<MemberPointerType>(); 2919 if (T1MPType && T2MPType && 2920 hasSameUnqualifiedType(QualType(T1MPType->getClass(), 0), 2921 QualType(T2MPType->getClass(), 0))) { 2922 T1 = T1MPType->getPointeeType(); 2923 T2 = T2MPType->getPointeeType(); 2924 return true; 2925 } 2926 2927 if (getLangOptions().ObjC1) { 2928 const ObjCObjectPointerType *T1OPType = T1->getAs<ObjCObjectPointerType>(), 2929 *T2OPType = T2->getAs<ObjCObjectPointerType>(); 2930 if (T1OPType && T2OPType) { 2931 T1 = T1OPType->getPointeeType(); 2932 T2 = T2OPType->getPointeeType(); 2933 return true; 2934 } 2935 } 2936 2937 // FIXME: Block pointers, too? 2938 2939 return false; 2940} 2941 2942DeclarationNameInfo 2943ASTContext::getNameForTemplate(TemplateName Name, 2944 SourceLocation NameLoc) const { 2945 if (TemplateDecl *TD = Name.getAsTemplateDecl()) 2946 // DNInfo work in progress: CHECKME: what about DNLoc? 2947 return DeclarationNameInfo(TD->getDeclName(), NameLoc); 2948 2949 if (DependentTemplateName *DTN = Name.getAsDependentTemplateName()) { 2950 DeclarationName DName; 2951 if (DTN->isIdentifier()) { 2952 DName = DeclarationNames.getIdentifier(DTN->getIdentifier()); 2953 return DeclarationNameInfo(DName, NameLoc); 2954 } else { 2955 DName = DeclarationNames.getCXXOperatorName(DTN->getOperator()); 2956 // DNInfo work in progress: FIXME: source locations? 2957 DeclarationNameLoc DNLoc; 2958 DNLoc.CXXOperatorName.BeginOpNameLoc = SourceLocation().getRawEncoding(); 2959 DNLoc.CXXOperatorName.EndOpNameLoc = SourceLocation().getRawEncoding(); 2960 return DeclarationNameInfo(DName, NameLoc, DNLoc); 2961 } 2962 } 2963 2964 OverloadedTemplateStorage *Storage = Name.getAsOverloadedTemplate(); 2965 assert(Storage); 2966 // DNInfo work in progress: CHECKME: what about DNLoc? 2967 return DeclarationNameInfo((*Storage->begin())->getDeclName(), NameLoc); 2968} 2969 2970TemplateName ASTContext::getCanonicalTemplateName(TemplateName Name) const { 2971 if (TemplateDecl *Template = Name.getAsTemplateDecl()) { 2972 if (TemplateTemplateParmDecl *TTP 2973 = dyn_cast<TemplateTemplateParmDecl>(Template)) 2974 Template = getCanonicalTemplateTemplateParmDecl(TTP); 2975 2976 // The canonical template name is the canonical template declaration. 2977 return TemplateName(cast<TemplateDecl>(Template->getCanonicalDecl())); 2978 } 2979 2980 if (SubstTemplateTemplateParmPackStorage *SubstPack 2981 = Name.getAsSubstTemplateTemplateParmPack()) { 2982 TemplateTemplateParmDecl *CanonParam 2983 = getCanonicalTemplateTemplateParmDecl(SubstPack->getParameterPack()); 2984 TemplateArgument CanonArgPack 2985 = getCanonicalTemplateArgument(SubstPack->getArgumentPack()); 2986 return getSubstTemplateTemplateParmPack(CanonParam, CanonArgPack); 2987 } 2988 2989 assert(!Name.getAsOverloadedTemplate()); 2990 2991 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 2992 assert(DTN && "Non-dependent template names must refer to template decls."); 2993 return DTN->CanonicalTemplateName; 2994} 2995 2996bool ASTContext::hasSameTemplateName(TemplateName X, TemplateName Y) { 2997 X = getCanonicalTemplateName(X); 2998 Y = getCanonicalTemplateName(Y); 2999 return X.getAsVoidPointer() == Y.getAsVoidPointer(); 3000} 3001 3002TemplateArgument 3003ASTContext::getCanonicalTemplateArgument(const TemplateArgument &Arg) const { 3004 switch (Arg.getKind()) { 3005 case TemplateArgument::Null: 3006 return Arg; 3007 3008 case TemplateArgument::Expression: 3009 return Arg; 3010 3011 case TemplateArgument::Declaration: 3012 return TemplateArgument(Arg.getAsDecl()->getCanonicalDecl()); 3013 3014 case TemplateArgument::Template: 3015 return TemplateArgument(getCanonicalTemplateName(Arg.getAsTemplate())); 3016 3017 case TemplateArgument::TemplateExpansion: 3018 return TemplateArgument(getCanonicalTemplateName( 3019 Arg.getAsTemplateOrTemplatePattern()), 3020 Arg.getNumTemplateExpansions()); 3021 3022 case TemplateArgument::Integral: 3023 return TemplateArgument(*Arg.getAsIntegral(), 3024 getCanonicalType(Arg.getIntegralType())); 3025 3026 case TemplateArgument::Type: 3027 return TemplateArgument(getCanonicalType(Arg.getAsType())); 3028 3029 case TemplateArgument::Pack: { 3030 if (Arg.pack_size() == 0) 3031 return Arg; 3032 3033 TemplateArgument *CanonArgs 3034 = new (*this) TemplateArgument[Arg.pack_size()]; 3035 unsigned Idx = 0; 3036 for (TemplateArgument::pack_iterator A = Arg.pack_begin(), 3037 AEnd = Arg.pack_end(); 3038 A != AEnd; (void)++A, ++Idx) 3039 CanonArgs[Idx] = getCanonicalTemplateArgument(*A); 3040 3041 return TemplateArgument(CanonArgs, Arg.pack_size()); 3042 } 3043 } 3044 3045 // Silence GCC warning 3046 assert(false && "Unhandled template argument kind"); 3047 return TemplateArgument(); 3048} 3049 3050NestedNameSpecifier * 3051ASTContext::getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) const { 3052 if (!NNS) 3053 return 0; 3054 3055 switch (NNS->getKind()) { 3056 case NestedNameSpecifier::Identifier: 3057 // Canonicalize the prefix but keep the identifier the same. 3058 return NestedNameSpecifier::Create(*this, 3059 getCanonicalNestedNameSpecifier(NNS->getPrefix()), 3060 NNS->getAsIdentifier()); 3061 3062 case NestedNameSpecifier::Namespace: 3063 // A namespace is canonical; build a nested-name-specifier with 3064 // this namespace and no prefix. 3065 return NestedNameSpecifier::Create(*this, 0, 3066 NNS->getAsNamespace()->getOriginalNamespace()); 3067 3068 case NestedNameSpecifier::NamespaceAlias: 3069 // A namespace is canonical; build a nested-name-specifier with 3070 // this namespace and no prefix. 3071 return NestedNameSpecifier::Create(*this, 0, 3072 NNS->getAsNamespaceAlias()->getNamespace() 3073 ->getOriginalNamespace()); 3074 3075 case NestedNameSpecifier::TypeSpec: 3076 case NestedNameSpecifier::TypeSpecWithTemplate: { 3077 QualType T = getCanonicalType(QualType(NNS->getAsType(), 0)); 3078 3079 // If we have some kind of dependent-named type (e.g., "typename T::type"), 3080 // break it apart into its prefix and identifier, then reconsititute those 3081 // as the canonical nested-name-specifier. This is required to canonicalize 3082 // a dependent nested-name-specifier involving typedefs of dependent-name 3083 // types, e.g., 3084 // typedef typename T::type T1; 3085 // typedef typename T1::type T2; 3086 if (const DependentNameType *DNT = T->getAs<DependentNameType>()) { 3087 NestedNameSpecifier *Prefix 3088 = getCanonicalNestedNameSpecifier(DNT->getQualifier()); 3089 return NestedNameSpecifier::Create(*this, Prefix, 3090 const_cast<IdentifierInfo *>(DNT->getIdentifier())); 3091 } 3092 3093 // Do the same thing as above, but with dependent-named specializations. 3094 if (const DependentTemplateSpecializationType *DTST 3095 = T->getAs<DependentTemplateSpecializationType>()) { 3096 NestedNameSpecifier *Prefix 3097 = getCanonicalNestedNameSpecifier(DTST->getQualifier()); 3098 3099 T = getDependentTemplateSpecializationType(DTST->getKeyword(), 3100 Prefix, DTST->getIdentifier(), 3101 DTST->getNumArgs(), 3102 DTST->getArgs()); 3103 T = getCanonicalType(T); 3104 } 3105 3106 return NestedNameSpecifier::Create(*this, 0, false, 3107 const_cast<Type*>(T.getTypePtr())); 3108 } 3109 3110 case NestedNameSpecifier::Global: 3111 // The global specifier is canonical and unique. 3112 return NNS; 3113 } 3114 3115 // Required to silence a GCC warning 3116 return 0; 3117} 3118 3119 3120const ArrayType *ASTContext::getAsArrayType(QualType T) const { 3121 // Handle the non-qualified case efficiently. 3122 if (!T.hasLocalQualifiers()) { 3123 // Handle the common positive case fast. 3124 if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 3125 return AT; 3126 } 3127 3128 // Handle the common negative case fast. 3129 if (!isa<ArrayType>(T.getCanonicalType())) 3130 return 0; 3131 3132 // Apply any qualifiers from the array type to the element type. This 3133 // implements C99 6.7.3p8: "If the specification of an array type includes 3134 // any type qualifiers, the element type is so qualified, not the array type." 3135 3136 // If we get here, we either have type qualifiers on the type, or we have 3137 // sugar such as a typedef in the way. If we have type qualifiers on the type 3138 // we must propagate them down into the element type. 3139 3140 SplitQualType split = T.getSplitDesugaredType(); 3141 Qualifiers qs = split.second; 3142 3143 // If we have a simple case, just return now. 3144 const ArrayType *ATy = dyn_cast<ArrayType>(split.first); 3145 if (ATy == 0 || qs.empty()) 3146 return ATy; 3147 3148 // Otherwise, we have an array and we have qualifiers on it. Push the 3149 // qualifiers into the array element type and return a new array type. 3150 QualType NewEltTy = getQualifiedType(ATy->getElementType(), qs); 3151 3152 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy)) 3153 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(), 3154 CAT->getSizeModifier(), 3155 CAT->getIndexTypeCVRQualifiers())); 3156 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy)) 3157 return cast<ArrayType>(getIncompleteArrayType(NewEltTy, 3158 IAT->getSizeModifier(), 3159 IAT->getIndexTypeCVRQualifiers())); 3160 3161 if (const DependentSizedArrayType *DSAT 3162 = dyn_cast<DependentSizedArrayType>(ATy)) 3163 return cast<ArrayType>( 3164 getDependentSizedArrayType(NewEltTy, 3165 DSAT->getSizeExpr(), 3166 DSAT->getSizeModifier(), 3167 DSAT->getIndexTypeCVRQualifiers(), 3168 DSAT->getBracketsRange())); 3169 3170 const VariableArrayType *VAT = cast<VariableArrayType>(ATy); 3171 return cast<ArrayType>(getVariableArrayType(NewEltTy, 3172 VAT->getSizeExpr(), 3173 VAT->getSizeModifier(), 3174 VAT->getIndexTypeCVRQualifiers(), 3175 VAT->getBracketsRange())); 3176} 3177 3178/// getArrayDecayedType - Return the properly qualified result of decaying the 3179/// specified array type to a pointer. This operation is non-trivial when 3180/// handling typedefs etc. The canonical type of "T" must be an array type, 3181/// this returns a pointer to a properly qualified element of the array. 3182/// 3183/// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 3184QualType ASTContext::getArrayDecayedType(QualType Ty) const { 3185 // Get the element type with 'getAsArrayType' so that we don't lose any 3186 // typedefs in the element type of the array. This also handles propagation 3187 // of type qualifiers from the array type into the element type if present 3188 // (C99 6.7.3p8). 3189 const ArrayType *PrettyArrayType = getAsArrayType(Ty); 3190 assert(PrettyArrayType && "Not an array type!"); 3191 3192 QualType PtrTy = getPointerType(PrettyArrayType->getElementType()); 3193 3194 // int x[restrict 4] -> int *restrict 3195 return getQualifiedType(PtrTy, PrettyArrayType->getIndexTypeQualifiers()); 3196} 3197 3198QualType ASTContext::getBaseElementType(const ArrayType *array) const { 3199 return getBaseElementType(array->getElementType()); 3200} 3201 3202QualType ASTContext::getBaseElementType(QualType type) const { 3203 Qualifiers qs; 3204 while (true) { 3205 SplitQualType split = type.getSplitDesugaredType(); 3206 const ArrayType *array = split.first->getAsArrayTypeUnsafe(); 3207 if (!array) break; 3208 3209 type = array->getElementType(); 3210 qs.addConsistentQualifiers(split.second); 3211 } 3212 3213 return getQualifiedType(type, qs); 3214} 3215 3216/// getConstantArrayElementCount - Returns number of constant array elements. 3217uint64_t 3218ASTContext::getConstantArrayElementCount(const ConstantArrayType *CA) const { 3219 uint64_t ElementCount = 1; 3220 do { 3221 ElementCount *= CA->getSize().getZExtValue(); 3222 CA = dyn_cast<ConstantArrayType>(CA->getElementType()); 3223 } while (CA); 3224 return ElementCount; 3225} 3226 3227/// getFloatingRank - Return a relative rank for floating point types. 3228/// This routine will assert if passed a built-in type that isn't a float. 3229static FloatingRank getFloatingRank(QualType T) { 3230 if (const ComplexType *CT = T->getAs<ComplexType>()) 3231 return getFloatingRank(CT->getElementType()); 3232 3233 assert(T->getAs<BuiltinType>() && "getFloatingRank(): not a floating type"); 3234 switch (T->getAs<BuiltinType>()->getKind()) { 3235 default: assert(0 && "getFloatingRank(): not a floating type"); 3236 case BuiltinType::Float: return FloatRank; 3237 case BuiltinType::Double: return DoubleRank; 3238 case BuiltinType::LongDouble: return LongDoubleRank; 3239 } 3240} 3241 3242/// getFloatingTypeOfSizeWithinDomain - Returns a real floating 3243/// point or a complex type (based on typeDomain/typeSize). 3244/// 'typeDomain' is a real floating point or complex type. 3245/// 'typeSize' is a real floating point or complex type. 3246QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size, 3247 QualType Domain) const { 3248 FloatingRank EltRank = getFloatingRank(Size); 3249 if (Domain->isComplexType()) { 3250 switch (EltRank) { 3251 default: assert(0 && "getFloatingRank(): illegal value for rank"); 3252 case FloatRank: return FloatComplexTy; 3253 case DoubleRank: return DoubleComplexTy; 3254 case LongDoubleRank: return LongDoubleComplexTy; 3255 } 3256 } 3257 3258 assert(Domain->isRealFloatingType() && "Unknown domain!"); 3259 switch (EltRank) { 3260 default: assert(0 && "getFloatingRank(): illegal value for rank"); 3261 case FloatRank: return FloatTy; 3262 case DoubleRank: return DoubleTy; 3263 case LongDoubleRank: return LongDoubleTy; 3264 } 3265} 3266 3267/// getFloatingTypeOrder - Compare the rank of the two specified floating 3268/// point types, ignoring the domain of the type (i.e. 'double' == 3269/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 3270/// LHS < RHS, return -1. 3271int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) const { 3272 FloatingRank LHSR = getFloatingRank(LHS); 3273 FloatingRank RHSR = getFloatingRank(RHS); 3274 3275 if (LHSR == RHSR) 3276 return 0; 3277 if (LHSR > RHSR) 3278 return 1; 3279 return -1; 3280} 3281 3282/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This 3283/// routine will assert if passed a built-in type that isn't an integer or enum, 3284/// or if it is not canonicalized. 3285unsigned ASTContext::getIntegerRank(const Type *T) const { 3286 assert(T->isCanonicalUnqualified() && "T should be canonicalized"); 3287 if (const EnumType* ET = dyn_cast<EnumType>(T)) 3288 T = ET->getDecl()->getPromotionType().getTypePtr(); 3289 3290 if (T->isSpecificBuiltinType(BuiltinType::WChar_S) || 3291 T->isSpecificBuiltinType(BuiltinType::WChar_U)) 3292 T = getFromTargetType(Target.getWCharType()).getTypePtr(); 3293 3294 if (T->isSpecificBuiltinType(BuiltinType::Char16)) 3295 T = getFromTargetType(Target.getChar16Type()).getTypePtr(); 3296 3297 if (T->isSpecificBuiltinType(BuiltinType::Char32)) 3298 T = getFromTargetType(Target.getChar32Type()).getTypePtr(); 3299 3300 switch (cast<BuiltinType>(T)->getKind()) { 3301 default: assert(0 && "getIntegerRank(): not a built-in integer"); 3302 case BuiltinType::Bool: 3303 return 1 + (getIntWidth(BoolTy) << 3); 3304 case BuiltinType::Char_S: 3305 case BuiltinType::Char_U: 3306 case BuiltinType::SChar: 3307 case BuiltinType::UChar: 3308 return 2 + (getIntWidth(CharTy) << 3); 3309 case BuiltinType::Short: 3310 case BuiltinType::UShort: 3311 return 3 + (getIntWidth(ShortTy) << 3); 3312 case BuiltinType::Int: 3313 case BuiltinType::UInt: 3314 return 4 + (getIntWidth(IntTy) << 3); 3315 case BuiltinType::Long: 3316 case BuiltinType::ULong: 3317 return 5 + (getIntWidth(LongTy) << 3); 3318 case BuiltinType::LongLong: 3319 case BuiltinType::ULongLong: 3320 return 6 + (getIntWidth(LongLongTy) << 3); 3321 case BuiltinType::Int128: 3322 case BuiltinType::UInt128: 3323 return 7 + (getIntWidth(Int128Ty) << 3); 3324 } 3325} 3326 3327/// \brief Whether this is a promotable bitfield reference according 3328/// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 3329/// 3330/// \returns the type this bit-field will promote to, or NULL if no 3331/// promotion occurs. 3332QualType ASTContext::isPromotableBitField(Expr *E) const { 3333 if (E->isTypeDependent() || E->isValueDependent()) 3334 return QualType(); 3335 3336 FieldDecl *Field = E->getBitField(); 3337 if (!Field) 3338 return QualType(); 3339 3340 QualType FT = Field->getType(); 3341 3342 llvm::APSInt BitWidthAP = Field->getBitWidth()->EvaluateAsInt(*this); 3343 uint64_t BitWidth = BitWidthAP.getZExtValue(); 3344 uint64_t IntSize = getTypeSize(IntTy); 3345 // GCC extension compatibility: if the bit-field size is less than or equal 3346 // to the size of int, it gets promoted no matter what its type is. 3347 // For instance, unsigned long bf : 4 gets promoted to signed int. 3348 if (BitWidth < IntSize) 3349 return IntTy; 3350 3351 if (BitWidth == IntSize) 3352 return FT->isSignedIntegerType() ? IntTy : UnsignedIntTy; 3353 3354 // Types bigger than int are not subject to promotions, and therefore act 3355 // like the base type. 3356 // FIXME: This doesn't quite match what gcc does, but what gcc does here 3357 // is ridiculous. 3358 return QualType(); 3359} 3360 3361/// getPromotedIntegerType - Returns the type that Promotable will 3362/// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 3363/// integer type. 3364QualType ASTContext::getPromotedIntegerType(QualType Promotable) const { 3365 assert(!Promotable.isNull()); 3366 assert(Promotable->isPromotableIntegerType()); 3367 if (const EnumType *ET = Promotable->getAs<EnumType>()) 3368 return ET->getDecl()->getPromotionType(); 3369 if (Promotable->isSignedIntegerType()) 3370 return IntTy; 3371 uint64_t PromotableSize = getTypeSize(Promotable); 3372 uint64_t IntSize = getTypeSize(IntTy); 3373 assert(Promotable->isUnsignedIntegerType() && PromotableSize <= IntSize); 3374 return (PromotableSize != IntSize) ? IntTy : UnsignedIntTy; 3375} 3376 3377/// getIntegerTypeOrder - Returns the highest ranked integer type: 3378/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 3379/// LHS < RHS, return -1. 3380int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) const { 3381 const Type *LHSC = getCanonicalType(LHS).getTypePtr(); 3382 const Type *RHSC = getCanonicalType(RHS).getTypePtr(); 3383 if (LHSC == RHSC) return 0; 3384 3385 bool LHSUnsigned = LHSC->isUnsignedIntegerType(); 3386 bool RHSUnsigned = RHSC->isUnsignedIntegerType(); 3387 3388 unsigned LHSRank = getIntegerRank(LHSC); 3389 unsigned RHSRank = getIntegerRank(RHSC); 3390 3391 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned. 3392 if (LHSRank == RHSRank) return 0; 3393 return LHSRank > RHSRank ? 1 : -1; 3394 } 3395 3396 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa. 3397 if (LHSUnsigned) { 3398 // If the unsigned [LHS] type is larger, return it. 3399 if (LHSRank >= RHSRank) 3400 return 1; 3401 3402 // If the signed type can represent all values of the unsigned type, it 3403 // wins. Because we are dealing with 2's complement and types that are 3404 // powers of two larger than each other, this is always safe. 3405 return -1; 3406 } 3407 3408 // If the unsigned [RHS] type is larger, return it. 3409 if (RHSRank >= LHSRank) 3410 return -1; 3411 3412 // If the signed type can represent all values of the unsigned type, it 3413 // wins. Because we are dealing with 2's complement and types that are 3414 // powers of two larger than each other, this is always safe. 3415 return 1; 3416} 3417 3418static RecordDecl * 3419CreateRecordDecl(const ASTContext &Ctx, RecordDecl::TagKind TK, 3420 DeclContext *DC, IdentifierInfo *Id) { 3421 SourceLocation Loc; 3422 if (Ctx.getLangOptions().CPlusPlus) 3423 return CXXRecordDecl::Create(Ctx, TK, DC, Loc, Loc, Id); 3424 else 3425 return RecordDecl::Create(Ctx, TK, DC, Loc, Loc, Id); 3426} 3427 3428// getCFConstantStringType - Return the type used for constant CFStrings. 3429QualType ASTContext::getCFConstantStringType() const { 3430 if (!CFConstantStringTypeDecl) { 3431 CFConstantStringTypeDecl = 3432 CreateRecordDecl(*this, TTK_Struct, TUDecl, 3433 &Idents.get("NSConstantString")); 3434 CFConstantStringTypeDecl->startDefinition(); 3435 3436 QualType FieldTypes[4]; 3437 3438 // const int *isa; 3439 FieldTypes[0] = getPointerType(IntTy.withConst()); 3440 // int flags; 3441 FieldTypes[1] = IntTy; 3442 // const char *str; 3443 FieldTypes[2] = getPointerType(CharTy.withConst()); 3444 // long length; 3445 FieldTypes[3] = LongTy; 3446 3447 // Create fields 3448 for (unsigned i = 0; i < 4; ++i) { 3449 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl, 3450 SourceLocation(), 3451 SourceLocation(), 0, 3452 FieldTypes[i], /*TInfo=*/0, 3453 /*BitWidth=*/0, 3454 /*Mutable=*/false); 3455 Field->setAccess(AS_public); 3456 CFConstantStringTypeDecl->addDecl(Field); 3457 } 3458 3459 CFConstantStringTypeDecl->completeDefinition(); 3460 } 3461 3462 return getTagDeclType(CFConstantStringTypeDecl); 3463} 3464 3465void ASTContext::setCFConstantStringType(QualType T) { 3466 const RecordType *Rec = T->getAs<RecordType>(); 3467 assert(Rec && "Invalid CFConstantStringType"); 3468 CFConstantStringTypeDecl = Rec->getDecl(); 3469} 3470 3471// getNSConstantStringType - Return the type used for constant NSStrings. 3472QualType ASTContext::getNSConstantStringType() const { 3473 if (!NSConstantStringTypeDecl) { 3474 NSConstantStringTypeDecl = 3475 CreateRecordDecl(*this, TTK_Struct, TUDecl, 3476 &Idents.get("__builtin_NSString")); 3477 NSConstantStringTypeDecl->startDefinition(); 3478 3479 QualType FieldTypes[3]; 3480 3481 // const int *isa; 3482 FieldTypes[0] = getPointerType(IntTy.withConst()); 3483 // const char *str; 3484 FieldTypes[1] = getPointerType(CharTy.withConst()); 3485 // unsigned int length; 3486 FieldTypes[2] = UnsignedIntTy; 3487 3488 // Create fields 3489 for (unsigned i = 0; i < 3; ++i) { 3490 FieldDecl *Field = FieldDecl::Create(*this, NSConstantStringTypeDecl, 3491 SourceLocation(), 3492 SourceLocation(), 0, 3493 FieldTypes[i], /*TInfo=*/0, 3494 /*BitWidth=*/0, 3495 /*Mutable=*/false); 3496 Field->setAccess(AS_public); 3497 NSConstantStringTypeDecl->addDecl(Field); 3498 } 3499 3500 NSConstantStringTypeDecl->completeDefinition(); 3501 } 3502 3503 return getTagDeclType(NSConstantStringTypeDecl); 3504} 3505 3506void ASTContext::setNSConstantStringType(QualType T) { 3507 const RecordType *Rec = T->getAs<RecordType>(); 3508 assert(Rec && "Invalid NSConstantStringType"); 3509 NSConstantStringTypeDecl = Rec->getDecl(); 3510} 3511 3512QualType ASTContext::getObjCFastEnumerationStateType() const { 3513 if (!ObjCFastEnumerationStateTypeDecl) { 3514 ObjCFastEnumerationStateTypeDecl = 3515 CreateRecordDecl(*this, TTK_Struct, TUDecl, 3516 &Idents.get("__objcFastEnumerationState")); 3517 ObjCFastEnumerationStateTypeDecl->startDefinition(); 3518 3519 QualType FieldTypes[] = { 3520 UnsignedLongTy, 3521 getPointerType(ObjCIdTypedefType), 3522 getPointerType(UnsignedLongTy), 3523 getConstantArrayType(UnsignedLongTy, 3524 llvm::APInt(32, 5), ArrayType::Normal, 0) 3525 }; 3526 3527 for (size_t i = 0; i < 4; ++i) { 3528 FieldDecl *Field = FieldDecl::Create(*this, 3529 ObjCFastEnumerationStateTypeDecl, 3530 SourceLocation(), 3531 SourceLocation(), 0, 3532 FieldTypes[i], /*TInfo=*/0, 3533 /*BitWidth=*/0, 3534 /*Mutable=*/false); 3535 Field->setAccess(AS_public); 3536 ObjCFastEnumerationStateTypeDecl->addDecl(Field); 3537 } 3538 3539 ObjCFastEnumerationStateTypeDecl->completeDefinition(); 3540 } 3541 3542 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 3543} 3544 3545QualType ASTContext::getBlockDescriptorType() const { 3546 if (BlockDescriptorType) 3547 return getTagDeclType(BlockDescriptorType); 3548 3549 RecordDecl *T; 3550 // FIXME: Needs the FlagAppleBlock bit. 3551 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, 3552 &Idents.get("__block_descriptor")); 3553 T->startDefinition(); 3554 3555 QualType FieldTypes[] = { 3556 UnsignedLongTy, 3557 UnsignedLongTy, 3558 }; 3559 3560 const char *FieldNames[] = { 3561 "reserved", 3562 "Size" 3563 }; 3564 3565 for (size_t i = 0; i < 2; ++i) { 3566 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3567 SourceLocation(), 3568 &Idents.get(FieldNames[i]), 3569 FieldTypes[i], /*TInfo=*/0, 3570 /*BitWidth=*/0, 3571 /*Mutable=*/false); 3572 Field->setAccess(AS_public); 3573 T->addDecl(Field); 3574 } 3575 3576 T->completeDefinition(); 3577 3578 BlockDescriptorType = T; 3579 3580 return getTagDeclType(BlockDescriptorType); 3581} 3582 3583void ASTContext::setBlockDescriptorType(QualType T) { 3584 const RecordType *Rec = T->getAs<RecordType>(); 3585 assert(Rec && "Invalid BlockDescriptorType"); 3586 BlockDescriptorType = Rec->getDecl(); 3587} 3588 3589QualType ASTContext::getBlockDescriptorExtendedType() const { 3590 if (BlockDescriptorExtendedType) 3591 return getTagDeclType(BlockDescriptorExtendedType); 3592 3593 RecordDecl *T; 3594 // FIXME: Needs the FlagAppleBlock bit. 3595 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, 3596 &Idents.get("__block_descriptor_withcopydispose")); 3597 T->startDefinition(); 3598 3599 QualType FieldTypes[] = { 3600 UnsignedLongTy, 3601 UnsignedLongTy, 3602 getPointerType(VoidPtrTy), 3603 getPointerType(VoidPtrTy) 3604 }; 3605 3606 const char *FieldNames[] = { 3607 "reserved", 3608 "Size", 3609 "CopyFuncPtr", 3610 "DestroyFuncPtr" 3611 }; 3612 3613 for (size_t i = 0; i < 4; ++i) { 3614 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3615 SourceLocation(), 3616 &Idents.get(FieldNames[i]), 3617 FieldTypes[i], /*TInfo=*/0, 3618 /*BitWidth=*/0, 3619 /*Mutable=*/false); 3620 Field->setAccess(AS_public); 3621 T->addDecl(Field); 3622 } 3623 3624 T->completeDefinition(); 3625 3626 BlockDescriptorExtendedType = T; 3627 3628 return getTagDeclType(BlockDescriptorExtendedType); 3629} 3630 3631void ASTContext::setBlockDescriptorExtendedType(QualType T) { 3632 const RecordType *Rec = T->getAs<RecordType>(); 3633 assert(Rec && "Invalid BlockDescriptorType"); 3634 BlockDescriptorExtendedType = Rec->getDecl(); 3635} 3636 3637bool ASTContext::BlockRequiresCopying(QualType Ty) const { 3638 if (Ty->isBlockPointerType()) 3639 return true; 3640 if (isObjCNSObjectType(Ty)) 3641 return true; 3642 if (Ty->isObjCObjectPointerType()) 3643 return true; 3644 if (getLangOptions().CPlusPlus) { 3645 if (const RecordType *RT = Ty->getAs<RecordType>()) { 3646 CXXRecordDecl *RD = cast<CXXRecordDecl>(RT->getDecl()); 3647 return RD->hasConstCopyConstructor(*this); 3648 3649 } 3650 } 3651 return false; 3652} 3653 3654QualType 3655ASTContext::BuildByRefType(llvm::StringRef DeclName, QualType Ty) const { 3656 // type = struct __Block_byref_1_X { 3657 // void *__isa; 3658 // struct __Block_byref_1_X *__forwarding; 3659 // unsigned int __flags; 3660 // unsigned int __size; 3661 // void *__copy_helper; // as needed 3662 // void *__destroy_help // as needed 3663 // int X; 3664 // } * 3665 3666 bool HasCopyAndDispose = BlockRequiresCopying(Ty); 3667 3668 // FIXME: Move up 3669 llvm::SmallString<36> Name; 3670 llvm::raw_svector_ostream(Name) << "__Block_byref_" << 3671 ++UniqueBlockByRefTypeID << '_' << DeclName; 3672 RecordDecl *T; 3673 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, &Idents.get(Name.str())); 3674 T->startDefinition(); 3675 QualType Int32Ty = IntTy; 3676 assert(getIntWidth(IntTy) == 32 && "non-32bit int not supported"); 3677 QualType FieldTypes[] = { 3678 getPointerType(VoidPtrTy), 3679 getPointerType(getTagDeclType(T)), 3680 Int32Ty, 3681 Int32Ty, 3682 getPointerType(VoidPtrTy), 3683 getPointerType(VoidPtrTy), 3684 Ty 3685 }; 3686 3687 llvm::StringRef FieldNames[] = { 3688 "__isa", 3689 "__forwarding", 3690 "__flags", 3691 "__size", 3692 "__copy_helper", 3693 "__destroy_helper", 3694 DeclName, 3695 }; 3696 3697 for (size_t i = 0; i < 7; ++i) { 3698 if (!HasCopyAndDispose && i >=4 && i <= 5) 3699 continue; 3700 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3701 SourceLocation(), 3702 &Idents.get(FieldNames[i]), 3703 FieldTypes[i], /*TInfo=*/0, 3704 /*BitWidth=*/0, /*Mutable=*/false); 3705 Field->setAccess(AS_public); 3706 T->addDecl(Field); 3707 } 3708 3709 T->completeDefinition(); 3710 3711 return getPointerType(getTagDeclType(T)); 3712} 3713 3714void ASTContext::setObjCFastEnumerationStateType(QualType T) { 3715 const RecordType *Rec = T->getAs<RecordType>(); 3716 assert(Rec && "Invalid ObjCFAstEnumerationStateType"); 3717 ObjCFastEnumerationStateTypeDecl = Rec->getDecl(); 3718} 3719 3720// This returns true if a type has been typedefed to BOOL: 3721// typedef <type> BOOL; 3722static bool isTypeTypedefedAsBOOL(QualType T) { 3723 if (const TypedefType *TT = dyn_cast<TypedefType>(T)) 3724 if (IdentifierInfo *II = TT->getDecl()->getIdentifier()) 3725 return II->isStr("BOOL"); 3726 3727 return false; 3728} 3729 3730/// getObjCEncodingTypeSize returns size of type for objective-c encoding 3731/// purpose. 3732CharUnits ASTContext::getObjCEncodingTypeSize(QualType type) const { 3733 CharUnits sz = getTypeSizeInChars(type); 3734 3735 // Make all integer and enum types at least as large as an int 3736 if (sz.isPositive() && type->isIntegralOrEnumerationType()) 3737 sz = std::max(sz, getTypeSizeInChars(IntTy)); 3738 // Treat arrays as pointers, since that's how they're passed in. 3739 else if (type->isArrayType()) 3740 sz = getTypeSizeInChars(VoidPtrTy); 3741 return sz; 3742} 3743 3744static inline 3745std::string charUnitsToString(const CharUnits &CU) { 3746 return llvm::itostr(CU.getQuantity()); 3747} 3748 3749/// getObjCEncodingForBlock - Return the encoded type for this block 3750/// declaration. 3751std::string ASTContext::getObjCEncodingForBlock(const BlockExpr *Expr) const { 3752 std::string S; 3753 3754 const BlockDecl *Decl = Expr->getBlockDecl(); 3755 QualType BlockTy = 3756 Expr->getType()->getAs<BlockPointerType>()->getPointeeType(); 3757 // Encode result type. 3758 getObjCEncodingForType(BlockTy->getAs<FunctionType>()->getResultType(), S); 3759 // Compute size of all parameters. 3760 // Start with computing size of a pointer in number of bytes. 3761 // FIXME: There might(should) be a better way of doing this computation! 3762 SourceLocation Loc; 3763 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3764 CharUnits ParmOffset = PtrSize; 3765 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), 3766 E = Decl->param_end(); PI != E; ++PI) { 3767 QualType PType = (*PI)->getType(); 3768 CharUnits sz = getObjCEncodingTypeSize(PType); 3769 assert (sz.isPositive() && "BlockExpr - Incomplete param type"); 3770 ParmOffset += sz; 3771 } 3772 // Size of the argument frame 3773 S += charUnitsToString(ParmOffset); 3774 // Block pointer and offset. 3775 S += "@?0"; 3776 ParmOffset = PtrSize; 3777 3778 // Argument types. 3779 ParmOffset = PtrSize; 3780 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), E = 3781 Decl->param_end(); PI != E; ++PI) { 3782 ParmVarDecl *PVDecl = *PI; 3783 QualType PType = PVDecl->getOriginalType(); 3784 if (const ArrayType *AT = 3785 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3786 // Use array's original type only if it has known number of 3787 // elements. 3788 if (!isa<ConstantArrayType>(AT)) 3789 PType = PVDecl->getType(); 3790 } else if (PType->isFunctionType()) 3791 PType = PVDecl->getType(); 3792 getObjCEncodingForType(PType, S); 3793 S += charUnitsToString(ParmOffset); 3794 ParmOffset += getObjCEncodingTypeSize(PType); 3795 } 3796 3797 return S; 3798} 3799 3800void ASTContext::getObjCEncodingForFunctionDecl(const FunctionDecl *Decl, 3801 std::string& S) { 3802 // Encode result type. 3803 getObjCEncodingForType(Decl->getResultType(), S); 3804 CharUnits ParmOffset; 3805 // Compute size of all parameters. 3806 for (FunctionDecl::param_const_iterator PI = Decl->param_begin(), 3807 E = Decl->param_end(); PI != E; ++PI) { 3808 QualType PType = (*PI)->getType(); 3809 CharUnits sz = getObjCEncodingTypeSize(PType); 3810 assert (sz.isPositive() && 3811 "getObjCEncodingForMethodDecl - Incomplete param type"); 3812 ParmOffset += sz; 3813 } 3814 S += charUnitsToString(ParmOffset); 3815 ParmOffset = CharUnits::Zero(); 3816 3817 // Argument types. 3818 for (FunctionDecl::param_const_iterator PI = Decl->param_begin(), 3819 E = Decl->param_end(); PI != E; ++PI) { 3820 ParmVarDecl *PVDecl = *PI; 3821 QualType PType = PVDecl->getOriginalType(); 3822 if (const ArrayType *AT = 3823 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3824 // Use array's original type only if it has known number of 3825 // elements. 3826 if (!isa<ConstantArrayType>(AT)) 3827 PType = PVDecl->getType(); 3828 } else if (PType->isFunctionType()) 3829 PType = PVDecl->getType(); 3830 getObjCEncodingForType(PType, S); 3831 S += charUnitsToString(ParmOffset); 3832 ParmOffset += getObjCEncodingTypeSize(PType); 3833 } 3834} 3835 3836/// getObjCEncodingForMethodDecl - Return the encoded type for this method 3837/// declaration. 3838void ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, 3839 std::string& S) const { 3840 // FIXME: This is not very efficient. 3841 // Encode type qualifer, 'in', 'inout', etc. for the return type. 3842 getObjCEncodingForTypeQualifier(Decl->getObjCDeclQualifier(), S); 3843 // Encode result type. 3844 getObjCEncodingForType(Decl->getResultType(), S); 3845 // Compute size of all parameters. 3846 // Start with computing size of a pointer in number of bytes. 3847 // FIXME: There might(should) be a better way of doing this computation! 3848 SourceLocation Loc; 3849 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3850 // The first two arguments (self and _cmd) are pointers; account for 3851 // their size. 3852 CharUnits ParmOffset = 2 * PtrSize; 3853 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3854 E = Decl->sel_param_end(); PI != E; ++PI) { 3855 QualType PType = (*PI)->getType(); 3856 CharUnits sz = getObjCEncodingTypeSize(PType); 3857 assert (sz.isPositive() && 3858 "getObjCEncodingForMethodDecl - Incomplete param type"); 3859 ParmOffset += sz; 3860 } 3861 S += charUnitsToString(ParmOffset); 3862 S += "@0:"; 3863 S += charUnitsToString(PtrSize); 3864 3865 // Argument types. 3866 ParmOffset = 2 * PtrSize; 3867 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3868 E = Decl->sel_param_end(); PI != E; ++PI) { 3869 ParmVarDecl *PVDecl = *PI; 3870 QualType PType = PVDecl->getOriginalType(); 3871 if (const ArrayType *AT = 3872 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3873 // Use array's original type only if it has known number of 3874 // elements. 3875 if (!isa<ConstantArrayType>(AT)) 3876 PType = PVDecl->getType(); 3877 } else if (PType->isFunctionType()) 3878 PType = PVDecl->getType(); 3879 // Process argument qualifiers for user supplied arguments; such as, 3880 // 'in', 'inout', etc. 3881 getObjCEncodingForTypeQualifier(PVDecl->getObjCDeclQualifier(), S); 3882 getObjCEncodingForType(PType, S); 3883 S += charUnitsToString(ParmOffset); 3884 ParmOffset += getObjCEncodingTypeSize(PType); 3885 } 3886} 3887 3888/// getObjCEncodingForPropertyDecl - Return the encoded type for this 3889/// property declaration. If non-NULL, Container must be either an 3890/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be 3891/// NULL when getting encodings for protocol properties. 3892/// Property attributes are stored as a comma-delimited C string. The simple 3893/// attributes readonly and bycopy are encoded as single characters. The 3894/// parametrized attributes, getter=name, setter=name, and ivar=name, are 3895/// encoded as single characters, followed by an identifier. Property types 3896/// are also encoded as a parametrized attribute. The characters used to encode 3897/// these attributes are defined by the following enumeration: 3898/// @code 3899/// enum PropertyAttributes { 3900/// kPropertyReadOnly = 'R', // property is read-only. 3901/// kPropertyBycopy = 'C', // property is a copy of the value last assigned 3902/// kPropertyByref = '&', // property is a reference to the value last assigned 3903/// kPropertyDynamic = 'D', // property is dynamic 3904/// kPropertyGetter = 'G', // followed by getter selector name 3905/// kPropertySetter = 'S', // followed by setter selector name 3906/// kPropertyInstanceVariable = 'V' // followed by instance variable name 3907/// kPropertyType = 't' // followed by old-style type encoding. 3908/// kPropertyWeak = 'W' // 'weak' property 3909/// kPropertyStrong = 'P' // property GC'able 3910/// kPropertyNonAtomic = 'N' // property non-atomic 3911/// }; 3912/// @endcode 3913void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 3914 const Decl *Container, 3915 std::string& S) const { 3916 // Collect information from the property implementation decl(s). 3917 bool Dynamic = false; 3918 ObjCPropertyImplDecl *SynthesizePID = 0; 3919 3920 // FIXME: Duplicated code due to poor abstraction. 3921 if (Container) { 3922 if (const ObjCCategoryImplDecl *CID = 3923 dyn_cast<ObjCCategoryImplDecl>(Container)) { 3924 for (ObjCCategoryImplDecl::propimpl_iterator 3925 i = CID->propimpl_begin(), e = CID->propimpl_end(); 3926 i != e; ++i) { 3927 ObjCPropertyImplDecl *PID = *i; 3928 if (PID->getPropertyDecl() == PD) { 3929 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3930 Dynamic = true; 3931 } else { 3932 SynthesizePID = PID; 3933 } 3934 } 3935 } 3936 } else { 3937 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container); 3938 for (ObjCCategoryImplDecl::propimpl_iterator 3939 i = OID->propimpl_begin(), e = OID->propimpl_end(); 3940 i != e; ++i) { 3941 ObjCPropertyImplDecl *PID = *i; 3942 if (PID->getPropertyDecl() == PD) { 3943 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3944 Dynamic = true; 3945 } else { 3946 SynthesizePID = PID; 3947 } 3948 } 3949 } 3950 } 3951 } 3952 3953 // FIXME: This is not very efficient. 3954 S = "T"; 3955 3956 // Encode result type. 3957 // GCC has some special rules regarding encoding of properties which 3958 // closely resembles encoding of ivars. 3959 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, 0, 3960 true /* outermost type */, 3961 true /* encoding for property */); 3962 3963 if (PD->isReadOnly()) { 3964 S += ",R"; 3965 } else { 3966 switch (PD->getSetterKind()) { 3967 case ObjCPropertyDecl::Assign: break; 3968 case ObjCPropertyDecl::Copy: S += ",C"; break; 3969 case ObjCPropertyDecl::Retain: S += ",&"; break; 3970 } 3971 } 3972 3973 // It really isn't clear at all what this means, since properties 3974 // are "dynamic by default". 3975 if (Dynamic) 3976 S += ",D"; 3977 3978 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) 3979 S += ",N"; 3980 3981 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) { 3982 S += ",G"; 3983 S += PD->getGetterName().getAsString(); 3984 } 3985 3986 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) { 3987 S += ",S"; 3988 S += PD->getSetterName().getAsString(); 3989 } 3990 3991 if (SynthesizePID) { 3992 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl(); 3993 S += ",V"; 3994 S += OID->getNameAsString(); 3995 } 3996 3997 // FIXME: OBJCGC: weak & strong 3998} 3999 4000/// getLegacyIntegralTypeEncoding - 4001/// Another legacy compatibility encoding: 32-bit longs are encoded as 4002/// 'l' or 'L' , but not always. For typedefs, we need to use 4003/// 'i' or 'I' instead if encoding a struct field, or a pointer! 4004/// 4005void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const { 4006 if (isa<TypedefType>(PointeeTy.getTypePtr())) { 4007 if (const BuiltinType *BT = PointeeTy->getAs<BuiltinType>()) { 4008 if (BT->getKind() == BuiltinType::ULong && getIntWidth(PointeeTy) == 32) 4009 PointeeTy = UnsignedIntTy; 4010 else 4011 if (BT->getKind() == BuiltinType::Long && getIntWidth(PointeeTy) == 32) 4012 PointeeTy = IntTy; 4013 } 4014 } 4015} 4016 4017void ASTContext::getObjCEncodingForType(QualType T, std::string& S, 4018 const FieldDecl *Field) const { 4019 // We follow the behavior of gcc, expanding structures which are 4020 // directly pointed to, and expanding embedded structures. Note that 4021 // these rules are sufficient to prevent recursive encoding of the 4022 // same type. 4023 getObjCEncodingForTypeImpl(T, S, true, true, Field, 4024 true /* outermost type */); 4025} 4026 4027static char ObjCEncodingForPrimitiveKind(const ASTContext *C, QualType T) { 4028 switch (T->getAs<BuiltinType>()->getKind()) { 4029 default: assert(0 && "Unhandled builtin type kind"); 4030 case BuiltinType::Void: return 'v'; 4031 case BuiltinType::Bool: return 'B'; 4032 case BuiltinType::Char_U: 4033 case BuiltinType::UChar: return 'C'; 4034 case BuiltinType::UShort: return 'S'; 4035 case BuiltinType::UInt: return 'I'; 4036 case BuiltinType::ULong: 4037 return C->getIntWidth(T) == 32 ? 'L' : 'Q'; 4038 case BuiltinType::UInt128: return 'T'; 4039 case BuiltinType::ULongLong: return 'Q'; 4040 case BuiltinType::Char_S: 4041 case BuiltinType::SChar: return 'c'; 4042 case BuiltinType::Short: return 's'; 4043 case BuiltinType::WChar_S: 4044 case BuiltinType::WChar_U: 4045 case BuiltinType::Int: return 'i'; 4046 case BuiltinType::Long: 4047 return C->getIntWidth(T) == 32 ? 'l' : 'q'; 4048 case BuiltinType::LongLong: return 'q'; 4049 case BuiltinType::Int128: return 't'; 4050 case BuiltinType::Float: return 'f'; 4051 case BuiltinType::Double: return 'd'; 4052 case BuiltinType::LongDouble: return 'D'; 4053 } 4054} 4055 4056static void EncodeBitField(const ASTContext *Ctx, std::string& S, 4057 QualType T, const FieldDecl *FD) { 4058 const Expr *E = FD->getBitWidth(); 4059 assert(E && "bitfield width not there - getObjCEncodingForTypeImpl"); 4060 S += 'b'; 4061 // The NeXT runtime encodes bit fields as b followed by the number of bits. 4062 // The GNU runtime requires more information; bitfields are encoded as b, 4063 // then the offset (in bits) of the first element, then the type of the 4064 // bitfield, then the size in bits. For example, in this structure: 4065 // 4066 // struct 4067 // { 4068 // int integer; 4069 // int flags:2; 4070 // }; 4071 // On a 32-bit system, the encoding for flags would be b2 for the NeXT 4072 // runtime, but b32i2 for the GNU runtime. The reason for this extra 4073 // information is not especially sensible, but we're stuck with it for 4074 // compatibility with GCC, although providing it breaks anything that 4075 // actually uses runtime introspection and wants to work on both runtimes... 4076 if (!Ctx->getLangOptions().NeXTRuntime) { 4077 const RecordDecl *RD = FD->getParent(); 4078 const ASTRecordLayout &RL = Ctx->getASTRecordLayout(RD); 4079 // FIXME: This same linear search is also used in ExprConstant - it might 4080 // be better if the FieldDecl stored its offset. We'd be increasing the 4081 // size of the object slightly, but saving some time every time it is used. 4082 unsigned i = 0; 4083 for (RecordDecl::field_iterator Field = RD->field_begin(), 4084 FieldEnd = RD->field_end(); 4085 Field != FieldEnd; (void)++Field, ++i) { 4086 if (*Field == FD) 4087 break; 4088 } 4089 S += llvm::utostr(RL.getFieldOffset(i)); 4090 if (T->isEnumeralType()) 4091 S += 'i'; 4092 else 4093 S += ObjCEncodingForPrimitiveKind(Ctx, T); 4094 } 4095 unsigned N = E->EvaluateAsInt(*Ctx).getZExtValue(); 4096 S += llvm::utostr(N); 4097} 4098 4099// FIXME: Use SmallString for accumulating string. 4100void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S, 4101 bool ExpandPointedToStructures, 4102 bool ExpandStructures, 4103 const FieldDecl *FD, 4104 bool OutermostType, 4105 bool EncodingProperty) const { 4106 if (T->getAs<BuiltinType>()) { 4107 if (FD && FD->isBitField()) 4108 return EncodeBitField(this, S, T, FD); 4109 S += ObjCEncodingForPrimitiveKind(this, T); 4110 return; 4111 } 4112 4113 if (const ComplexType *CT = T->getAs<ComplexType>()) { 4114 S += 'j'; 4115 getObjCEncodingForTypeImpl(CT->getElementType(), S, false, false, 0, false, 4116 false); 4117 return; 4118 } 4119 4120 // encoding for pointer or r3eference types. 4121 QualType PointeeTy; 4122 if (const PointerType *PT = T->getAs<PointerType>()) { 4123 if (PT->isObjCSelType()) { 4124 S += ':'; 4125 return; 4126 } 4127 PointeeTy = PT->getPointeeType(); 4128 } 4129 else if (const ReferenceType *RT = T->getAs<ReferenceType>()) 4130 PointeeTy = RT->getPointeeType(); 4131 if (!PointeeTy.isNull()) { 4132 bool isReadOnly = false; 4133 // For historical/compatibility reasons, the read-only qualifier of the 4134 // pointee gets emitted _before_ the '^'. The read-only qualifier of 4135 // the pointer itself gets ignored, _unless_ we are looking at a typedef! 4136 // Also, do not emit the 'r' for anything but the outermost type! 4137 if (isa<TypedefType>(T.getTypePtr())) { 4138 if (OutermostType && T.isConstQualified()) { 4139 isReadOnly = true; 4140 S += 'r'; 4141 } 4142 } else if (OutermostType) { 4143 QualType P = PointeeTy; 4144 while (P->getAs<PointerType>()) 4145 P = P->getAs<PointerType>()->getPointeeType(); 4146 if (P.isConstQualified()) { 4147 isReadOnly = true; 4148 S += 'r'; 4149 } 4150 } 4151 if (isReadOnly) { 4152 // Another legacy compatibility encoding. Some ObjC qualifier and type 4153 // combinations need to be rearranged. 4154 // Rewrite "in const" from "nr" to "rn" 4155 if (llvm::StringRef(S).endswith("nr")) 4156 S.replace(S.end()-2, S.end(), "rn"); 4157 } 4158 4159 if (PointeeTy->isCharType()) { 4160 // char pointer types should be encoded as '*' unless it is a 4161 // type that has been typedef'd to 'BOOL'. 4162 if (!isTypeTypedefedAsBOOL(PointeeTy)) { 4163 S += '*'; 4164 return; 4165 } 4166 } else if (const RecordType *RTy = PointeeTy->getAs<RecordType>()) { 4167 // GCC binary compat: Need to convert "struct objc_class *" to "#". 4168 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_class")) { 4169 S += '#'; 4170 return; 4171 } 4172 // GCC binary compat: Need to convert "struct objc_object *" to "@". 4173 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_object")) { 4174 S += '@'; 4175 return; 4176 } 4177 // fall through... 4178 } 4179 S += '^'; 4180 getLegacyIntegralTypeEncoding(PointeeTy); 4181 4182 getObjCEncodingForTypeImpl(PointeeTy, S, false, ExpandPointedToStructures, 4183 NULL); 4184 return; 4185 } 4186 4187 if (const ArrayType *AT = 4188 // Ignore type qualifiers etc. 4189 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) { 4190 if (isa<IncompleteArrayType>(AT)) { 4191 // Incomplete arrays are encoded as a pointer to the array element. 4192 S += '^'; 4193 4194 getObjCEncodingForTypeImpl(AT->getElementType(), S, 4195 false, ExpandStructures, FD); 4196 } else { 4197 S += '['; 4198 4199 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 4200 S += llvm::utostr(CAT->getSize().getZExtValue()); 4201 else { 4202 //Variable length arrays are encoded as a regular array with 0 elements. 4203 assert(isa<VariableArrayType>(AT) && "Unknown array type!"); 4204 S += '0'; 4205 } 4206 4207 getObjCEncodingForTypeImpl(AT->getElementType(), S, 4208 false, ExpandStructures, FD); 4209 S += ']'; 4210 } 4211 return; 4212 } 4213 4214 if (T->getAs<FunctionType>()) { 4215 S += '?'; 4216 return; 4217 } 4218 4219 if (const RecordType *RTy = T->getAs<RecordType>()) { 4220 RecordDecl *RDecl = RTy->getDecl(); 4221 S += RDecl->isUnion() ? '(' : '{'; 4222 // Anonymous structures print as '?' 4223 if (const IdentifierInfo *II = RDecl->getIdentifier()) { 4224 S += II->getName(); 4225 if (ClassTemplateSpecializationDecl *Spec 4226 = dyn_cast<ClassTemplateSpecializationDecl>(RDecl)) { 4227 const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs(); 4228 std::string TemplateArgsStr 4229 = TemplateSpecializationType::PrintTemplateArgumentList( 4230 TemplateArgs.data(), 4231 TemplateArgs.size(), 4232 (*this).PrintingPolicy); 4233 4234 S += TemplateArgsStr; 4235 } 4236 } else { 4237 S += '?'; 4238 } 4239 if (ExpandStructures) { 4240 S += '='; 4241 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 4242 FieldEnd = RDecl->field_end(); 4243 Field != FieldEnd; ++Field) { 4244 if (FD) { 4245 S += '"'; 4246 S += Field->getNameAsString(); 4247 S += '"'; 4248 } 4249 4250 // Special case bit-fields. 4251 if (Field->isBitField()) { 4252 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, 4253 (*Field)); 4254 } else { 4255 QualType qt = Field->getType(); 4256 getLegacyIntegralTypeEncoding(qt); 4257 getObjCEncodingForTypeImpl(qt, S, false, true, 4258 FD); 4259 } 4260 } 4261 } 4262 S += RDecl->isUnion() ? ')' : '}'; 4263 return; 4264 } 4265 4266 if (T->isEnumeralType()) { 4267 if (FD && FD->isBitField()) 4268 EncodeBitField(this, S, T, FD); 4269 else 4270 S += 'i'; 4271 return; 4272 } 4273 4274 if (T->isBlockPointerType()) { 4275 S += "@?"; // Unlike a pointer-to-function, which is "^?". 4276 return; 4277 } 4278 4279 // Ignore protocol qualifiers when mangling at this level. 4280 if (const ObjCObjectType *OT = T->getAs<ObjCObjectType>()) 4281 T = OT->getBaseType(); 4282 4283 if (const ObjCInterfaceType *OIT = T->getAs<ObjCInterfaceType>()) { 4284 // @encode(class_name) 4285 ObjCInterfaceDecl *OI = OIT->getDecl(); 4286 S += '{'; 4287 const IdentifierInfo *II = OI->getIdentifier(); 4288 S += II->getName(); 4289 S += '='; 4290 llvm::SmallVector<ObjCIvarDecl*, 32> Ivars; 4291 DeepCollectObjCIvars(OI, true, Ivars); 4292 for (unsigned i = 0, e = Ivars.size(); i != e; ++i) { 4293 FieldDecl *Field = cast<FieldDecl>(Ivars[i]); 4294 if (Field->isBitField()) 4295 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, Field); 4296 else 4297 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, FD); 4298 } 4299 S += '}'; 4300 return; 4301 } 4302 4303 if (const ObjCObjectPointerType *OPT = T->getAs<ObjCObjectPointerType>()) { 4304 if (OPT->isObjCIdType()) { 4305 S += '@'; 4306 return; 4307 } 4308 4309 if (OPT->isObjCClassType() || OPT->isObjCQualifiedClassType()) { 4310 // FIXME: Consider if we need to output qualifiers for 'Class<p>'. 4311 // Since this is a binary compatibility issue, need to consult with runtime 4312 // folks. Fortunately, this is a *very* obsure construct. 4313 S += '#'; 4314 return; 4315 } 4316 4317 if (OPT->isObjCQualifiedIdType()) { 4318 getObjCEncodingForTypeImpl(getObjCIdType(), S, 4319 ExpandPointedToStructures, 4320 ExpandStructures, FD); 4321 if (FD || EncodingProperty) { 4322 // Note that we do extended encoding of protocol qualifer list 4323 // Only when doing ivar or property encoding. 4324 S += '"'; 4325 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 4326 E = OPT->qual_end(); I != E; ++I) { 4327 S += '<'; 4328 S += (*I)->getNameAsString(); 4329 S += '>'; 4330 } 4331 S += '"'; 4332 } 4333 return; 4334 } 4335 4336 QualType PointeeTy = OPT->getPointeeType(); 4337 if (!EncodingProperty && 4338 isa<TypedefType>(PointeeTy.getTypePtr())) { 4339 // Another historical/compatibility reason. 4340 // We encode the underlying type which comes out as 4341 // {...}; 4342 S += '^'; 4343 getObjCEncodingForTypeImpl(PointeeTy, S, 4344 false, ExpandPointedToStructures, 4345 NULL); 4346 return; 4347 } 4348 4349 S += '@'; 4350 if (OPT->getInterfaceDecl() && (FD || EncodingProperty)) { 4351 S += '"'; 4352 S += OPT->getInterfaceDecl()->getIdentifier()->getName(); 4353 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 4354 E = OPT->qual_end(); I != E; ++I) { 4355 S += '<'; 4356 S += (*I)->getNameAsString(); 4357 S += '>'; 4358 } 4359 S += '"'; 4360 } 4361 return; 4362 } 4363 4364 // gcc just blithely ignores member pointers. 4365 // TODO: maybe there should be a mangling for these 4366 if (T->getAs<MemberPointerType>()) 4367 return; 4368 4369 if (T->isVectorType()) { 4370 // This matches gcc's encoding, even though technically it is 4371 // insufficient. 4372 // FIXME. We should do a better job than gcc. 4373 return; 4374 } 4375 4376 assert(0 && "@encode for type not implemented!"); 4377} 4378 4379void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 4380 std::string& S) const { 4381 if (QT & Decl::OBJC_TQ_In) 4382 S += 'n'; 4383 if (QT & Decl::OBJC_TQ_Inout) 4384 S += 'N'; 4385 if (QT & Decl::OBJC_TQ_Out) 4386 S += 'o'; 4387 if (QT & Decl::OBJC_TQ_Bycopy) 4388 S += 'O'; 4389 if (QT & Decl::OBJC_TQ_Byref) 4390 S += 'R'; 4391 if (QT & Decl::OBJC_TQ_Oneway) 4392 S += 'V'; 4393} 4394 4395void ASTContext::setBuiltinVaListType(QualType T) { 4396 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!"); 4397 4398 BuiltinVaListType = T; 4399} 4400 4401void ASTContext::setObjCIdType(QualType T) { 4402 ObjCIdTypedefType = T; 4403} 4404 4405void ASTContext::setObjCSelType(QualType T) { 4406 ObjCSelTypedefType = T; 4407} 4408 4409void ASTContext::setObjCProtoType(QualType QT) { 4410 ObjCProtoType = QT; 4411} 4412 4413void ASTContext::setObjCClassType(QualType T) { 4414 ObjCClassTypedefType = T; 4415} 4416 4417void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) { 4418 assert(ObjCConstantStringType.isNull() && 4419 "'NSConstantString' type already set!"); 4420 4421 ObjCConstantStringType = getObjCInterfaceType(Decl); 4422} 4423 4424/// \brief Retrieve the template name that corresponds to a non-empty 4425/// lookup. 4426TemplateName 4427ASTContext::getOverloadedTemplateName(UnresolvedSetIterator Begin, 4428 UnresolvedSetIterator End) const { 4429 unsigned size = End - Begin; 4430 assert(size > 1 && "set is not overloaded!"); 4431 4432 void *memory = Allocate(sizeof(OverloadedTemplateStorage) + 4433 size * sizeof(FunctionTemplateDecl*)); 4434 OverloadedTemplateStorage *OT = new(memory) OverloadedTemplateStorage(size); 4435 4436 NamedDecl **Storage = OT->getStorage(); 4437 for (UnresolvedSetIterator I = Begin; I != End; ++I) { 4438 NamedDecl *D = *I; 4439 assert(isa<FunctionTemplateDecl>(D) || 4440 (isa<UsingShadowDecl>(D) && 4441 isa<FunctionTemplateDecl>(D->getUnderlyingDecl()))); 4442 *Storage++ = D; 4443 } 4444 4445 return TemplateName(OT); 4446} 4447 4448/// \brief Retrieve the template name that represents a qualified 4449/// template name such as \c std::vector. 4450TemplateName 4451ASTContext::getQualifiedTemplateName(NestedNameSpecifier *NNS, 4452 bool TemplateKeyword, 4453 TemplateDecl *Template) const { 4454 assert(NNS && "Missing nested-name-specifier in qualified template name"); 4455 4456 // FIXME: Canonicalization? 4457 llvm::FoldingSetNodeID ID; 4458 QualifiedTemplateName::Profile(ID, NNS, TemplateKeyword, Template); 4459 4460 void *InsertPos = 0; 4461 QualifiedTemplateName *QTN = 4462 QualifiedTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4463 if (!QTN) { 4464 QTN = new (*this,4) QualifiedTemplateName(NNS, TemplateKeyword, Template); 4465 QualifiedTemplateNames.InsertNode(QTN, InsertPos); 4466 } 4467 4468 return TemplateName(QTN); 4469} 4470 4471/// \brief Retrieve the template name that represents a dependent 4472/// template name such as \c MetaFun::template apply. 4473TemplateName 4474ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 4475 const IdentifierInfo *Name) const { 4476 assert((!NNS || NNS->isDependent()) && 4477 "Nested name specifier must be dependent"); 4478 4479 llvm::FoldingSetNodeID ID; 4480 DependentTemplateName::Profile(ID, NNS, Name); 4481 4482 void *InsertPos = 0; 4483 DependentTemplateName *QTN = 4484 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4485 4486 if (QTN) 4487 return TemplateName(QTN); 4488 4489 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 4490 if (CanonNNS == NNS) { 4491 QTN = new (*this,4) DependentTemplateName(NNS, Name); 4492 } else { 4493 TemplateName Canon = getDependentTemplateName(CanonNNS, Name); 4494 QTN = new (*this,4) DependentTemplateName(NNS, Name, Canon); 4495 DependentTemplateName *CheckQTN = 4496 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4497 assert(!CheckQTN && "Dependent type name canonicalization broken"); 4498 (void)CheckQTN; 4499 } 4500 4501 DependentTemplateNames.InsertNode(QTN, InsertPos); 4502 return TemplateName(QTN); 4503} 4504 4505/// \brief Retrieve the template name that represents a dependent 4506/// template name such as \c MetaFun::template operator+. 4507TemplateName 4508ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 4509 OverloadedOperatorKind Operator) const { 4510 assert((!NNS || NNS->isDependent()) && 4511 "Nested name specifier must be dependent"); 4512 4513 llvm::FoldingSetNodeID ID; 4514 DependentTemplateName::Profile(ID, NNS, Operator); 4515 4516 void *InsertPos = 0; 4517 DependentTemplateName *QTN 4518 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4519 4520 if (QTN) 4521 return TemplateName(QTN); 4522 4523 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 4524 if (CanonNNS == NNS) { 4525 QTN = new (*this,4) DependentTemplateName(NNS, Operator); 4526 } else { 4527 TemplateName Canon = getDependentTemplateName(CanonNNS, Operator); 4528 QTN = new (*this,4) DependentTemplateName(NNS, Operator, Canon); 4529 4530 DependentTemplateName *CheckQTN 4531 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4532 assert(!CheckQTN && "Dependent template name canonicalization broken"); 4533 (void)CheckQTN; 4534 } 4535 4536 DependentTemplateNames.InsertNode(QTN, InsertPos); 4537 return TemplateName(QTN); 4538} 4539 4540TemplateName 4541ASTContext::getSubstTemplateTemplateParmPack(TemplateTemplateParmDecl *Param, 4542 const TemplateArgument &ArgPack) const { 4543 ASTContext &Self = const_cast<ASTContext &>(*this); 4544 llvm::FoldingSetNodeID ID; 4545 SubstTemplateTemplateParmPackStorage::Profile(ID, Self, Param, ArgPack); 4546 4547 void *InsertPos = 0; 4548 SubstTemplateTemplateParmPackStorage *Subst 4549 = SubstTemplateTemplateParmPacks.FindNodeOrInsertPos(ID, InsertPos); 4550 4551 if (!Subst) { 4552 Subst = new (*this) SubstTemplateTemplateParmPackStorage(Self, Param, 4553 ArgPack.pack_size(), 4554 ArgPack.pack_begin()); 4555 SubstTemplateTemplateParmPacks.InsertNode(Subst, InsertPos); 4556 } 4557 4558 return TemplateName(Subst); 4559} 4560 4561/// getFromTargetType - Given one of the integer types provided by 4562/// TargetInfo, produce the corresponding type. The unsigned @p Type 4563/// is actually a value of type @c TargetInfo::IntType. 4564CanQualType ASTContext::getFromTargetType(unsigned Type) const { 4565 switch (Type) { 4566 case TargetInfo::NoInt: return CanQualType(); 4567 case TargetInfo::SignedShort: return ShortTy; 4568 case TargetInfo::UnsignedShort: return UnsignedShortTy; 4569 case TargetInfo::SignedInt: return IntTy; 4570 case TargetInfo::UnsignedInt: return UnsignedIntTy; 4571 case TargetInfo::SignedLong: return LongTy; 4572 case TargetInfo::UnsignedLong: return UnsignedLongTy; 4573 case TargetInfo::SignedLongLong: return LongLongTy; 4574 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy; 4575 } 4576 4577 assert(false && "Unhandled TargetInfo::IntType value"); 4578 return CanQualType(); 4579} 4580 4581//===----------------------------------------------------------------------===// 4582// Type Predicates. 4583//===----------------------------------------------------------------------===// 4584 4585/// isObjCNSObjectType - Return true if this is an NSObject object using 4586/// NSObject attribute on a c-style pointer type. 4587/// FIXME - Make it work directly on types. 4588/// FIXME: Move to Type. 4589/// 4590bool ASTContext::isObjCNSObjectType(QualType Ty) const { 4591 if (const TypedefType *TDT = dyn_cast<TypedefType>(Ty)) { 4592 if (TypedefNameDecl *TD = TDT->getDecl()) 4593 if (TD->getAttr<ObjCNSObjectAttr>()) 4594 return true; 4595 } 4596 return false; 4597} 4598 4599/// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 4600/// garbage collection attribute. 4601/// 4602Qualifiers::GC ASTContext::getObjCGCAttrKind(QualType Ty) const { 4603 if (getLangOptions().getGCMode() == LangOptions::NonGC) 4604 return Qualifiers::GCNone; 4605 4606 assert(getLangOptions().ObjC1); 4607 Qualifiers::GC GCAttrs = Ty.getObjCGCAttr(); 4608 4609 // Default behaviour under objective-C's gc is for ObjC pointers 4610 // (or pointers to them) be treated as though they were declared 4611 // as __strong. 4612 if (GCAttrs == Qualifiers::GCNone) { 4613 if (Ty->isObjCObjectPointerType() || Ty->isBlockPointerType()) 4614 return Qualifiers::Strong; 4615 else if (Ty->isPointerType()) 4616 return getObjCGCAttrKind(Ty->getAs<PointerType>()->getPointeeType()); 4617 } else { 4618 // It's not valid to set GC attributes on anything that isn't a 4619 // pointer. 4620#ifndef NDEBUG 4621 QualType CT = Ty->getCanonicalTypeInternal(); 4622 while (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 4623 CT = AT->getElementType(); 4624 assert(CT->isAnyPointerType() || CT->isBlockPointerType()); 4625#endif 4626 } 4627 return GCAttrs; 4628} 4629 4630//===----------------------------------------------------------------------===// 4631// Type Compatibility Testing 4632//===----------------------------------------------------------------------===// 4633 4634/// areCompatVectorTypes - Return true if the two specified vector types are 4635/// compatible. 4636static bool areCompatVectorTypes(const VectorType *LHS, 4637 const VectorType *RHS) { 4638 assert(LHS->isCanonicalUnqualified() && RHS->isCanonicalUnqualified()); 4639 return LHS->getElementType() == RHS->getElementType() && 4640 LHS->getNumElements() == RHS->getNumElements(); 4641} 4642 4643bool ASTContext::areCompatibleVectorTypes(QualType FirstVec, 4644 QualType SecondVec) { 4645 assert(FirstVec->isVectorType() && "FirstVec should be a vector type"); 4646 assert(SecondVec->isVectorType() && "SecondVec should be a vector type"); 4647 4648 if (hasSameUnqualifiedType(FirstVec, SecondVec)) 4649 return true; 4650 4651 // Treat Neon vector types and most AltiVec vector types as if they are the 4652 // equivalent GCC vector types. 4653 const VectorType *First = FirstVec->getAs<VectorType>(); 4654 const VectorType *Second = SecondVec->getAs<VectorType>(); 4655 if (First->getNumElements() == Second->getNumElements() && 4656 hasSameType(First->getElementType(), Second->getElementType()) && 4657 First->getVectorKind() != VectorType::AltiVecPixel && 4658 First->getVectorKind() != VectorType::AltiVecBool && 4659 Second->getVectorKind() != VectorType::AltiVecPixel && 4660 Second->getVectorKind() != VectorType::AltiVecBool) 4661 return true; 4662 4663 return false; 4664} 4665 4666//===----------------------------------------------------------------------===// 4667// ObjCQualifiedIdTypesAreCompatible - Compatibility testing for qualified id's. 4668//===----------------------------------------------------------------------===// 4669 4670/// ProtocolCompatibleWithProtocol - return 'true' if 'lProto' is in the 4671/// inheritance hierarchy of 'rProto'. 4672bool 4673ASTContext::ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 4674 ObjCProtocolDecl *rProto) const { 4675 if (lProto == rProto) 4676 return true; 4677 for (ObjCProtocolDecl::protocol_iterator PI = rProto->protocol_begin(), 4678 E = rProto->protocol_end(); PI != E; ++PI) 4679 if (ProtocolCompatibleWithProtocol(lProto, *PI)) 4680 return true; 4681 return false; 4682} 4683 4684/// QualifiedIdConformsQualifiedId - compare id<p,...> with id<p1,...> 4685/// return true if lhs's protocols conform to rhs's protocol; false 4686/// otherwise. 4687bool ASTContext::QualifiedIdConformsQualifiedId(QualType lhs, QualType rhs) { 4688 if (lhs->isObjCQualifiedIdType() && rhs->isObjCQualifiedIdType()) 4689 return ObjCQualifiedIdTypesAreCompatible(lhs, rhs, false); 4690 return false; 4691} 4692 4693/// ObjCQualifiedClassTypesAreCompatible - compare Class<p,...> and 4694/// Class<p1, ...>. 4695bool ASTContext::ObjCQualifiedClassTypesAreCompatible(QualType lhs, 4696 QualType rhs) { 4697 const ObjCObjectPointerType *lhsQID = lhs->getAs<ObjCObjectPointerType>(); 4698 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 4699 assert ((lhsQID && rhsOPT) && "ObjCQualifiedClassTypesAreCompatible"); 4700 4701 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4702 E = lhsQID->qual_end(); I != E; ++I) { 4703 bool match = false; 4704 ObjCProtocolDecl *lhsProto = *I; 4705 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 4706 E = rhsOPT->qual_end(); J != E; ++J) { 4707 ObjCProtocolDecl *rhsProto = *J; 4708 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto)) { 4709 match = true; 4710 break; 4711 } 4712 } 4713 if (!match) 4714 return false; 4715 } 4716 return true; 4717} 4718 4719/// ObjCQualifiedIdTypesAreCompatible - We know that one of lhs/rhs is an 4720/// ObjCQualifiedIDType. 4721bool ASTContext::ObjCQualifiedIdTypesAreCompatible(QualType lhs, QualType rhs, 4722 bool compare) { 4723 // Allow id<P..> and an 'id' or void* type in all cases. 4724 if (lhs->isVoidPointerType() || 4725 lhs->isObjCIdType() || lhs->isObjCClassType()) 4726 return true; 4727 else if (rhs->isVoidPointerType() || 4728 rhs->isObjCIdType() || rhs->isObjCClassType()) 4729 return true; 4730 4731 if (const ObjCObjectPointerType *lhsQID = lhs->getAsObjCQualifiedIdType()) { 4732 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 4733 4734 if (!rhsOPT) return false; 4735 4736 if (rhsOPT->qual_empty()) { 4737 // If the RHS is a unqualified interface pointer "NSString*", 4738 // make sure we check the class hierarchy. 4739 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4740 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4741 E = lhsQID->qual_end(); I != E; ++I) { 4742 // when comparing an id<P> on lhs with a static type on rhs, 4743 // see if static class implements all of id's protocols, directly or 4744 // through its super class and categories. 4745 if (!rhsID->ClassImplementsProtocol(*I, true)) 4746 return false; 4747 } 4748 } 4749 // If there are no qualifiers and no interface, we have an 'id'. 4750 return true; 4751 } 4752 // Both the right and left sides have qualifiers. 4753 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4754 E = lhsQID->qual_end(); I != E; ++I) { 4755 ObjCProtocolDecl *lhsProto = *I; 4756 bool match = false; 4757 4758 // when comparing an id<P> on lhs with a static type on rhs, 4759 // see if static class implements all of id's protocols, directly or 4760 // through its super class and categories. 4761 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 4762 E = rhsOPT->qual_end(); J != E; ++J) { 4763 ObjCProtocolDecl *rhsProto = *J; 4764 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4765 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4766 match = true; 4767 break; 4768 } 4769 } 4770 // If the RHS is a qualified interface pointer "NSString<P>*", 4771 // make sure we check the class hierarchy. 4772 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4773 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4774 E = lhsQID->qual_end(); I != E; ++I) { 4775 // when comparing an id<P> on lhs with a static type on rhs, 4776 // see if static class implements all of id's protocols, directly or 4777 // through its super class and categories. 4778 if (rhsID->ClassImplementsProtocol(*I, true)) { 4779 match = true; 4780 break; 4781 } 4782 } 4783 } 4784 if (!match) 4785 return false; 4786 } 4787 4788 return true; 4789 } 4790 4791 const ObjCObjectPointerType *rhsQID = rhs->getAsObjCQualifiedIdType(); 4792 assert(rhsQID && "One of the LHS/RHS should be id<x>"); 4793 4794 if (const ObjCObjectPointerType *lhsOPT = 4795 lhs->getAsObjCInterfacePointerType()) { 4796 // If both the right and left sides have qualifiers. 4797 for (ObjCObjectPointerType::qual_iterator I = lhsOPT->qual_begin(), 4798 E = lhsOPT->qual_end(); I != E; ++I) { 4799 ObjCProtocolDecl *lhsProto = *I; 4800 bool match = false; 4801 4802 // when comparing an id<P> on rhs with a static type on lhs, 4803 // see if static class implements all of id's protocols, directly or 4804 // through its super class and categories. 4805 // First, lhs protocols in the qualifier list must be found, direct 4806 // or indirect in rhs's qualifier list or it is a mismatch. 4807 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 4808 E = rhsQID->qual_end(); J != E; ++J) { 4809 ObjCProtocolDecl *rhsProto = *J; 4810 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4811 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4812 match = true; 4813 break; 4814 } 4815 } 4816 if (!match) 4817 return false; 4818 } 4819 4820 // Static class's protocols, or its super class or category protocols 4821 // must be found, direct or indirect in rhs's qualifier list or it is a mismatch. 4822 if (ObjCInterfaceDecl *lhsID = lhsOPT->getInterfaceDecl()) { 4823 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 4824 CollectInheritedProtocols(lhsID, LHSInheritedProtocols); 4825 // This is rather dubious but matches gcc's behavior. If lhs has 4826 // no type qualifier and its class has no static protocol(s) 4827 // assume that it is mismatch. 4828 if (LHSInheritedProtocols.empty() && lhsOPT->qual_empty()) 4829 return false; 4830 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 4831 LHSInheritedProtocols.begin(), 4832 E = LHSInheritedProtocols.end(); I != E; ++I) { 4833 bool match = false; 4834 ObjCProtocolDecl *lhsProto = (*I); 4835 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 4836 E = rhsQID->qual_end(); J != E; ++J) { 4837 ObjCProtocolDecl *rhsProto = *J; 4838 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4839 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4840 match = true; 4841 break; 4842 } 4843 } 4844 if (!match) 4845 return false; 4846 } 4847 } 4848 return true; 4849 } 4850 return false; 4851} 4852 4853/// canAssignObjCInterfaces - Return true if the two interface types are 4854/// compatible for assignment from RHS to LHS. This handles validation of any 4855/// protocol qualifiers on the LHS or RHS. 4856/// 4857bool ASTContext::canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 4858 const ObjCObjectPointerType *RHSOPT) { 4859 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 4860 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 4861 4862 // If either type represents the built-in 'id' or 'Class' types, return true. 4863 if (LHS->isObjCUnqualifiedIdOrClass() || 4864 RHS->isObjCUnqualifiedIdOrClass()) 4865 return true; 4866 4867 if (LHS->isObjCQualifiedId() || RHS->isObjCQualifiedId()) 4868 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4869 QualType(RHSOPT,0), 4870 false); 4871 4872 if (LHS->isObjCQualifiedClass() && RHS->isObjCQualifiedClass()) 4873 return ObjCQualifiedClassTypesAreCompatible(QualType(LHSOPT,0), 4874 QualType(RHSOPT,0)); 4875 4876 // If we have 2 user-defined types, fall into that path. 4877 if (LHS->getInterface() && RHS->getInterface()) 4878 return canAssignObjCInterfaces(LHS, RHS); 4879 4880 return false; 4881} 4882 4883/// canAssignObjCInterfacesInBlockPointer - This routine is specifically written 4884/// for providing type-safety for objective-c pointers used to pass/return 4885/// arguments in block literals. When passed as arguments, passing 'A*' where 4886/// 'id' is expected is not OK. Passing 'Sub *" where 'Super *" is expected is 4887/// not OK. For the return type, the opposite is not OK. 4888bool ASTContext::canAssignObjCInterfacesInBlockPointer( 4889 const ObjCObjectPointerType *LHSOPT, 4890 const ObjCObjectPointerType *RHSOPT, 4891 bool BlockReturnType) { 4892 if (RHSOPT->isObjCBuiltinType() || LHSOPT->isObjCIdType()) 4893 return true; 4894 4895 if (LHSOPT->isObjCBuiltinType()) { 4896 return RHSOPT->isObjCBuiltinType() || RHSOPT->isObjCQualifiedIdType(); 4897 } 4898 4899 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 4900 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4901 QualType(RHSOPT,0), 4902 false); 4903 4904 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4905 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4906 if (LHS && RHS) { // We have 2 user-defined types. 4907 if (LHS != RHS) { 4908 if (LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 4909 return BlockReturnType; 4910 if (RHS->getDecl()->isSuperClassOf(LHS->getDecl())) 4911 return !BlockReturnType; 4912 } 4913 else 4914 return true; 4915 } 4916 return false; 4917} 4918 4919/// getIntersectionOfProtocols - This routine finds the intersection of set 4920/// of protocols inherited from two distinct objective-c pointer objects. 4921/// It is used to build composite qualifier list of the composite type of 4922/// the conditional expression involving two objective-c pointer objects. 4923static 4924void getIntersectionOfProtocols(ASTContext &Context, 4925 const ObjCObjectPointerType *LHSOPT, 4926 const ObjCObjectPointerType *RHSOPT, 4927 llvm::SmallVectorImpl<ObjCProtocolDecl *> &IntersectionOfProtocols) { 4928 4929 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 4930 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 4931 assert(LHS->getInterface() && "LHS must have an interface base"); 4932 assert(RHS->getInterface() && "RHS must have an interface base"); 4933 4934 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> InheritedProtocolSet; 4935 unsigned LHSNumProtocols = LHS->getNumProtocols(); 4936 if (LHSNumProtocols > 0) 4937 InheritedProtocolSet.insert(LHS->qual_begin(), LHS->qual_end()); 4938 else { 4939 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 4940 Context.CollectInheritedProtocols(LHS->getInterface(), 4941 LHSInheritedProtocols); 4942 InheritedProtocolSet.insert(LHSInheritedProtocols.begin(), 4943 LHSInheritedProtocols.end()); 4944 } 4945 4946 unsigned RHSNumProtocols = RHS->getNumProtocols(); 4947 if (RHSNumProtocols > 0) { 4948 ObjCProtocolDecl **RHSProtocols = 4949 const_cast<ObjCProtocolDecl **>(RHS->qual_begin()); 4950 for (unsigned i = 0; i < RHSNumProtocols; ++i) 4951 if (InheritedProtocolSet.count(RHSProtocols[i])) 4952 IntersectionOfProtocols.push_back(RHSProtocols[i]); 4953 } 4954 else { 4955 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> RHSInheritedProtocols; 4956 Context.CollectInheritedProtocols(RHS->getInterface(), 4957 RHSInheritedProtocols); 4958 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 4959 RHSInheritedProtocols.begin(), 4960 E = RHSInheritedProtocols.end(); I != E; ++I) 4961 if (InheritedProtocolSet.count((*I))) 4962 IntersectionOfProtocols.push_back((*I)); 4963 } 4964} 4965 4966/// areCommonBaseCompatible - Returns common base class of the two classes if 4967/// one found. Note that this is O'2 algorithm. But it will be called as the 4968/// last type comparison in a ?-exp of ObjC pointer types before a 4969/// warning is issued. So, its invokation is extremely rare. 4970QualType ASTContext::areCommonBaseCompatible( 4971 const ObjCObjectPointerType *Lptr, 4972 const ObjCObjectPointerType *Rptr) { 4973 const ObjCObjectType *LHS = Lptr->getObjectType(); 4974 const ObjCObjectType *RHS = Rptr->getObjectType(); 4975 const ObjCInterfaceDecl* LDecl = LHS->getInterface(); 4976 const ObjCInterfaceDecl* RDecl = RHS->getInterface(); 4977 if (!LDecl || !RDecl || (LDecl == RDecl)) 4978 return QualType(); 4979 4980 do { 4981 LHS = cast<ObjCInterfaceType>(getObjCInterfaceType(LDecl)); 4982 if (canAssignObjCInterfaces(LHS, RHS)) { 4983 llvm::SmallVector<ObjCProtocolDecl *, 8> Protocols; 4984 getIntersectionOfProtocols(*this, Lptr, Rptr, Protocols); 4985 4986 QualType Result = QualType(LHS, 0); 4987 if (!Protocols.empty()) 4988 Result = getObjCObjectType(Result, Protocols.data(), Protocols.size()); 4989 Result = getObjCObjectPointerType(Result); 4990 return Result; 4991 } 4992 } while ((LDecl = LDecl->getSuperClass())); 4993 4994 return QualType(); 4995} 4996 4997bool ASTContext::canAssignObjCInterfaces(const ObjCObjectType *LHS, 4998 const ObjCObjectType *RHS) { 4999 assert(LHS->getInterface() && "LHS is not an interface type"); 5000 assert(RHS->getInterface() && "RHS is not an interface type"); 5001 5002 // Verify that the base decls are compatible: the RHS must be a subclass of 5003 // the LHS. 5004 if (!LHS->getInterface()->isSuperClassOf(RHS->getInterface())) 5005 return false; 5006 5007 // RHS must have a superset of the protocols in the LHS. If the LHS is not 5008 // protocol qualified at all, then we are good. 5009 if (LHS->getNumProtocols() == 0) 5010 return true; 5011 5012 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, 5013 // more detailed analysis is required. 5014 if (RHS->getNumProtocols() == 0) { 5015 // OK, if LHS is a superclass of RHS *and* 5016 // this superclass is assignment compatible with LHS. 5017 // false otherwise. 5018 bool IsSuperClass = 5019 LHS->getInterface()->isSuperClassOf(RHS->getInterface()); 5020 if (IsSuperClass) { 5021 // OK if conversion of LHS to SuperClass results in narrowing of types 5022 // ; i.e., SuperClass may implement at least one of the protocols 5023 // in LHS's protocol list. Example, SuperObj<P1> = lhs<P1,P2> is ok. 5024 // But not SuperObj<P1,P2,P3> = lhs<P1,P2>. 5025 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> SuperClassInheritedProtocols; 5026 CollectInheritedProtocols(RHS->getInterface(), SuperClassInheritedProtocols); 5027 // If super class has no protocols, it is not a match. 5028 if (SuperClassInheritedProtocols.empty()) 5029 return false; 5030 5031 for (ObjCObjectType::qual_iterator LHSPI = LHS->qual_begin(), 5032 LHSPE = LHS->qual_end(); 5033 LHSPI != LHSPE; LHSPI++) { 5034 bool SuperImplementsProtocol = false; 5035 ObjCProtocolDecl *LHSProto = (*LHSPI); 5036 5037 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 5038 SuperClassInheritedProtocols.begin(), 5039 E = SuperClassInheritedProtocols.end(); I != E; ++I) { 5040 ObjCProtocolDecl *SuperClassProto = (*I); 5041 if (SuperClassProto->lookupProtocolNamed(LHSProto->getIdentifier())) { 5042 SuperImplementsProtocol = true; 5043 break; 5044 } 5045 } 5046 if (!SuperImplementsProtocol) 5047 return false; 5048 } 5049 return true; 5050 } 5051 return false; 5052 } 5053 5054 for (ObjCObjectType::qual_iterator LHSPI = LHS->qual_begin(), 5055 LHSPE = LHS->qual_end(); 5056 LHSPI != LHSPE; LHSPI++) { 5057 bool RHSImplementsProtocol = false; 5058 5059 // If the RHS doesn't implement the protocol on the left, the types 5060 // are incompatible. 5061 for (ObjCObjectType::qual_iterator RHSPI = RHS->qual_begin(), 5062 RHSPE = RHS->qual_end(); 5063 RHSPI != RHSPE; RHSPI++) { 5064 if ((*RHSPI)->lookupProtocolNamed((*LHSPI)->getIdentifier())) { 5065 RHSImplementsProtocol = true; 5066 break; 5067 } 5068 } 5069 // FIXME: For better diagnostics, consider passing back the protocol name. 5070 if (!RHSImplementsProtocol) 5071 return false; 5072 } 5073 // The RHS implements all protocols listed on the LHS. 5074 return true; 5075} 5076 5077bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) { 5078 // get the "pointed to" types 5079 const ObjCObjectPointerType *LHSOPT = LHS->getAs<ObjCObjectPointerType>(); 5080 const ObjCObjectPointerType *RHSOPT = RHS->getAs<ObjCObjectPointerType>(); 5081 5082 if (!LHSOPT || !RHSOPT) 5083 return false; 5084 5085 return canAssignObjCInterfaces(LHSOPT, RHSOPT) || 5086 canAssignObjCInterfaces(RHSOPT, LHSOPT); 5087} 5088 5089bool ASTContext::canBindObjCObjectType(QualType To, QualType From) { 5090 return canAssignObjCInterfaces( 5091 getObjCObjectPointerType(To)->getAs<ObjCObjectPointerType>(), 5092 getObjCObjectPointerType(From)->getAs<ObjCObjectPointerType>()); 5093} 5094 5095/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible, 5096/// both shall have the identically qualified version of a compatible type. 5097/// C99 6.2.7p1: Two types have compatible types if their types are the 5098/// same. See 6.7.[2,3,5] for additional rules. 5099bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS, 5100 bool CompareUnqualified) { 5101 if (getLangOptions().CPlusPlus) 5102 return hasSameType(LHS, RHS); 5103 5104 return !mergeTypes(LHS, RHS, false, CompareUnqualified).isNull(); 5105} 5106 5107bool ASTContext::typesAreBlockPointerCompatible(QualType LHS, QualType RHS) { 5108 return !mergeTypes(LHS, RHS, true).isNull(); 5109} 5110 5111/// mergeTransparentUnionType - if T is a transparent union type and a member 5112/// of T is compatible with SubType, return the merged type, else return 5113/// QualType() 5114QualType ASTContext::mergeTransparentUnionType(QualType T, QualType SubType, 5115 bool OfBlockPointer, 5116 bool Unqualified) { 5117 if (const RecordType *UT = T->getAsUnionType()) { 5118 RecordDecl *UD = UT->getDecl(); 5119 if (UD->hasAttr<TransparentUnionAttr>()) { 5120 for (RecordDecl::field_iterator it = UD->field_begin(), 5121 itend = UD->field_end(); it != itend; ++it) { 5122 QualType ET = it->getType().getUnqualifiedType(); 5123 QualType MT = mergeTypes(ET, SubType, OfBlockPointer, Unqualified); 5124 if (!MT.isNull()) 5125 return MT; 5126 } 5127 } 5128 } 5129 5130 return QualType(); 5131} 5132 5133/// mergeFunctionArgumentTypes - merge two types which appear as function 5134/// argument types 5135QualType ASTContext::mergeFunctionArgumentTypes(QualType lhs, QualType rhs, 5136 bool OfBlockPointer, 5137 bool Unqualified) { 5138 // GNU extension: two types are compatible if they appear as a function 5139 // argument, one of the types is a transparent union type and the other 5140 // type is compatible with a union member 5141 QualType lmerge = mergeTransparentUnionType(lhs, rhs, OfBlockPointer, 5142 Unqualified); 5143 if (!lmerge.isNull()) 5144 return lmerge; 5145 5146 QualType rmerge = mergeTransparentUnionType(rhs, lhs, OfBlockPointer, 5147 Unqualified); 5148 if (!rmerge.isNull()) 5149 return rmerge; 5150 5151 return mergeTypes(lhs, rhs, OfBlockPointer, Unqualified); 5152} 5153 5154QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs, 5155 bool OfBlockPointer, 5156 bool Unqualified) { 5157 const FunctionType *lbase = lhs->getAs<FunctionType>(); 5158 const FunctionType *rbase = rhs->getAs<FunctionType>(); 5159 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 5160 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 5161 bool allLTypes = true; 5162 bool allRTypes = true; 5163 5164 // Check return type 5165 QualType retType; 5166 if (OfBlockPointer) { 5167 QualType RHS = rbase->getResultType(); 5168 QualType LHS = lbase->getResultType(); 5169 bool UnqualifiedResult = Unqualified; 5170 if (!UnqualifiedResult) 5171 UnqualifiedResult = (!RHS.hasQualifiers() && LHS.hasQualifiers()); 5172 retType = mergeTypes(LHS, RHS, true, UnqualifiedResult, true); 5173 } 5174 else 5175 retType = mergeTypes(lbase->getResultType(), rbase->getResultType(), false, 5176 Unqualified); 5177 if (retType.isNull()) return QualType(); 5178 5179 if (Unqualified) 5180 retType = retType.getUnqualifiedType(); 5181 5182 CanQualType LRetType = getCanonicalType(lbase->getResultType()); 5183 CanQualType RRetType = getCanonicalType(rbase->getResultType()); 5184 if (Unqualified) { 5185 LRetType = LRetType.getUnqualifiedType(); 5186 RRetType = RRetType.getUnqualifiedType(); 5187 } 5188 5189 if (getCanonicalType(retType) != LRetType) 5190 allLTypes = false; 5191 if (getCanonicalType(retType) != RRetType) 5192 allRTypes = false; 5193 5194 // FIXME: double check this 5195 // FIXME: should we error if lbase->getRegParmAttr() != 0 && 5196 // rbase->getRegParmAttr() != 0 && 5197 // lbase->getRegParmAttr() != rbase->getRegParmAttr()? 5198 FunctionType::ExtInfo lbaseInfo = lbase->getExtInfo(); 5199 FunctionType::ExtInfo rbaseInfo = rbase->getExtInfo(); 5200 5201 // Compatible functions must have compatible calling conventions 5202 if (!isSameCallConv(lbaseInfo.getCC(), rbaseInfo.getCC())) 5203 return QualType(); 5204 5205 // Regparm is part of the calling convention. 5206 if (lbaseInfo.getHasRegParm() != rbaseInfo.getHasRegParm()) 5207 return QualType(); 5208 if (lbaseInfo.getRegParm() != rbaseInfo.getRegParm()) 5209 return QualType(); 5210 5211 // It's noreturn if either type is. 5212 // FIXME: some uses, e.g. conditional exprs, really want this to be 'both'. 5213 bool NoReturn = lbaseInfo.getNoReturn() || rbaseInfo.getNoReturn(); 5214 if (NoReturn != lbaseInfo.getNoReturn()) 5215 allLTypes = false; 5216 if (NoReturn != rbaseInfo.getNoReturn()) 5217 allRTypes = false; 5218 5219 FunctionType::ExtInfo einfo(NoReturn, 5220 lbaseInfo.getHasRegParm(), 5221 lbaseInfo.getRegParm(), 5222 lbaseInfo.getCC()); 5223 5224 if (lproto && rproto) { // two C99 style function prototypes 5225 assert(!lproto->hasExceptionSpec() && !rproto->hasExceptionSpec() && 5226 "C++ shouldn't be here"); 5227 unsigned lproto_nargs = lproto->getNumArgs(); 5228 unsigned rproto_nargs = rproto->getNumArgs(); 5229 5230 // Compatible functions must have the same number of arguments 5231 if (lproto_nargs != rproto_nargs) 5232 return QualType(); 5233 5234 // Variadic and non-variadic functions aren't compatible 5235 if (lproto->isVariadic() != rproto->isVariadic()) 5236 return QualType(); 5237 5238 if (lproto->getTypeQuals() != rproto->getTypeQuals()) 5239 return QualType(); 5240 5241 // Check argument compatibility 5242 llvm::SmallVector<QualType, 10> types; 5243 for (unsigned i = 0; i < lproto_nargs; i++) { 5244 QualType largtype = lproto->getArgType(i).getUnqualifiedType(); 5245 QualType rargtype = rproto->getArgType(i).getUnqualifiedType(); 5246 QualType argtype = mergeFunctionArgumentTypes(largtype, rargtype, 5247 OfBlockPointer, 5248 Unqualified); 5249 if (argtype.isNull()) return QualType(); 5250 5251 if (Unqualified) 5252 argtype = argtype.getUnqualifiedType(); 5253 5254 types.push_back(argtype); 5255 if (Unqualified) { 5256 largtype = largtype.getUnqualifiedType(); 5257 rargtype = rargtype.getUnqualifiedType(); 5258 } 5259 5260 if (getCanonicalType(argtype) != getCanonicalType(largtype)) 5261 allLTypes = false; 5262 if (getCanonicalType(argtype) != getCanonicalType(rargtype)) 5263 allRTypes = false; 5264 } 5265 if (allLTypes) return lhs; 5266 if (allRTypes) return rhs; 5267 5268 FunctionProtoType::ExtProtoInfo EPI = lproto->getExtProtoInfo(); 5269 EPI.ExtInfo = einfo; 5270 return getFunctionType(retType, types.begin(), types.size(), EPI); 5271 } 5272 5273 if (lproto) allRTypes = false; 5274 if (rproto) allLTypes = false; 5275 5276 const FunctionProtoType *proto = lproto ? lproto : rproto; 5277 if (proto) { 5278 assert(!proto->hasExceptionSpec() && "C++ shouldn't be here"); 5279 if (proto->isVariadic()) return QualType(); 5280 // Check that the types are compatible with the types that 5281 // would result from default argument promotions (C99 6.7.5.3p15). 5282 // The only types actually affected are promotable integer 5283 // types and floats, which would be passed as a different 5284 // type depending on whether the prototype is visible. 5285 unsigned proto_nargs = proto->getNumArgs(); 5286 for (unsigned i = 0; i < proto_nargs; ++i) { 5287 QualType argTy = proto->getArgType(i); 5288 5289 // Look at the promotion type of enum types, since that is the type used 5290 // to pass enum values. 5291 if (const EnumType *Enum = argTy->getAs<EnumType>()) 5292 argTy = Enum->getDecl()->getPromotionType(); 5293 5294 if (argTy->isPromotableIntegerType() || 5295 getCanonicalType(argTy).getUnqualifiedType() == FloatTy) 5296 return QualType(); 5297 } 5298 5299 if (allLTypes) return lhs; 5300 if (allRTypes) return rhs; 5301 5302 FunctionProtoType::ExtProtoInfo EPI = proto->getExtProtoInfo(); 5303 EPI.ExtInfo = einfo; 5304 return getFunctionType(retType, proto->arg_type_begin(), 5305 proto->getNumArgs(), EPI); 5306 } 5307 5308 if (allLTypes) return lhs; 5309 if (allRTypes) return rhs; 5310 return getFunctionNoProtoType(retType, einfo); 5311} 5312 5313QualType ASTContext::mergeTypes(QualType LHS, QualType RHS, 5314 bool OfBlockPointer, 5315 bool Unqualified, bool BlockReturnType) { 5316 // C++ [expr]: If an expression initially has the type "reference to T", the 5317 // type is adjusted to "T" prior to any further analysis, the expression 5318 // designates the object or function denoted by the reference, and the 5319 // expression is an lvalue unless the reference is an rvalue reference and 5320 // the expression is a function call (possibly inside parentheses). 5321 assert(!LHS->getAs<ReferenceType>() && "LHS is a reference type?"); 5322 assert(!RHS->getAs<ReferenceType>() && "RHS is a reference type?"); 5323 5324 if (Unqualified) { 5325 LHS = LHS.getUnqualifiedType(); 5326 RHS = RHS.getUnqualifiedType(); 5327 } 5328 5329 QualType LHSCan = getCanonicalType(LHS), 5330 RHSCan = getCanonicalType(RHS); 5331 5332 // If two types are identical, they are compatible. 5333 if (LHSCan == RHSCan) 5334 return LHS; 5335 5336 // If the qualifiers are different, the types aren't compatible... mostly. 5337 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 5338 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 5339 if (LQuals != RQuals) { 5340 // If any of these qualifiers are different, we have a type 5341 // mismatch. 5342 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 5343 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 5344 return QualType(); 5345 5346 // Exactly one GC qualifier difference is allowed: __strong is 5347 // okay if the other type has no GC qualifier but is an Objective 5348 // C object pointer (i.e. implicitly strong by default). We fix 5349 // this by pretending that the unqualified type was actually 5350 // qualified __strong. 5351 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 5352 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 5353 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 5354 5355 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 5356 return QualType(); 5357 5358 if (GC_L == Qualifiers::Strong && RHSCan->isObjCObjectPointerType()) { 5359 return mergeTypes(LHS, getObjCGCQualType(RHS, Qualifiers::Strong)); 5360 } 5361 if (GC_R == Qualifiers::Strong && LHSCan->isObjCObjectPointerType()) { 5362 return mergeTypes(getObjCGCQualType(LHS, Qualifiers::Strong), RHS); 5363 } 5364 return QualType(); 5365 } 5366 5367 // Okay, qualifiers are equal. 5368 5369 Type::TypeClass LHSClass = LHSCan->getTypeClass(); 5370 Type::TypeClass RHSClass = RHSCan->getTypeClass(); 5371 5372 // We want to consider the two function types to be the same for these 5373 // comparisons, just force one to the other. 5374 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto; 5375 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto; 5376 5377 // Same as above for arrays 5378 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray) 5379 LHSClass = Type::ConstantArray; 5380 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray) 5381 RHSClass = Type::ConstantArray; 5382 5383 // ObjCInterfaces are just specialized ObjCObjects. 5384 if (LHSClass == Type::ObjCInterface) LHSClass = Type::ObjCObject; 5385 if (RHSClass == Type::ObjCInterface) RHSClass = Type::ObjCObject; 5386 5387 // Canonicalize ExtVector -> Vector. 5388 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector; 5389 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector; 5390 5391 // If the canonical type classes don't match. 5392 if (LHSClass != RHSClass) { 5393 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char, 5394 // a signed integer type, or an unsigned integer type. 5395 // Compatibility is based on the underlying type, not the promotion 5396 // type. 5397 if (const EnumType* ETy = LHS->getAs<EnumType>()) { 5398 if (ETy->getDecl()->getIntegerType() == RHSCan.getUnqualifiedType()) 5399 return RHS; 5400 } 5401 if (const EnumType* ETy = RHS->getAs<EnumType>()) { 5402 if (ETy->getDecl()->getIntegerType() == LHSCan.getUnqualifiedType()) 5403 return LHS; 5404 } 5405 5406 return QualType(); 5407 } 5408 5409 // The canonical type classes match. 5410 switch (LHSClass) { 5411#define TYPE(Class, Base) 5412#define ABSTRACT_TYPE(Class, Base) 5413#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) case Type::Class: 5414#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 5415#define DEPENDENT_TYPE(Class, Base) case Type::Class: 5416#include "clang/AST/TypeNodes.def" 5417 assert(false && "Non-canonical and dependent types shouldn't get here"); 5418 return QualType(); 5419 5420 case Type::LValueReference: 5421 case Type::RValueReference: 5422 case Type::MemberPointer: 5423 assert(false && "C++ should never be in mergeTypes"); 5424 return QualType(); 5425 5426 case Type::ObjCInterface: 5427 case Type::IncompleteArray: 5428 case Type::VariableArray: 5429 case Type::FunctionProto: 5430 case Type::ExtVector: 5431 assert(false && "Types are eliminated above"); 5432 return QualType(); 5433 5434 case Type::Pointer: 5435 { 5436 // Merge two pointer types, while trying to preserve typedef info 5437 QualType LHSPointee = LHS->getAs<PointerType>()->getPointeeType(); 5438 QualType RHSPointee = RHS->getAs<PointerType>()->getPointeeType(); 5439 if (Unqualified) { 5440 LHSPointee = LHSPointee.getUnqualifiedType(); 5441 RHSPointee = RHSPointee.getUnqualifiedType(); 5442 } 5443 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, false, 5444 Unqualified); 5445 if (ResultType.isNull()) return QualType(); 5446 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 5447 return LHS; 5448 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 5449 return RHS; 5450 return getPointerType(ResultType); 5451 } 5452 case Type::BlockPointer: 5453 { 5454 // Merge two block pointer types, while trying to preserve typedef info 5455 QualType LHSPointee = LHS->getAs<BlockPointerType>()->getPointeeType(); 5456 QualType RHSPointee = RHS->getAs<BlockPointerType>()->getPointeeType(); 5457 if (Unqualified) { 5458 LHSPointee = LHSPointee.getUnqualifiedType(); 5459 RHSPointee = RHSPointee.getUnqualifiedType(); 5460 } 5461 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, OfBlockPointer, 5462 Unqualified); 5463 if (ResultType.isNull()) return QualType(); 5464 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 5465 return LHS; 5466 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 5467 return RHS; 5468 return getBlockPointerType(ResultType); 5469 } 5470 case Type::ConstantArray: 5471 { 5472 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS); 5473 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS); 5474 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize()) 5475 return QualType(); 5476 5477 QualType LHSElem = getAsArrayType(LHS)->getElementType(); 5478 QualType RHSElem = getAsArrayType(RHS)->getElementType(); 5479 if (Unqualified) { 5480 LHSElem = LHSElem.getUnqualifiedType(); 5481 RHSElem = RHSElem.getUnqualifiedType(); 5482 } 5483 5484 QualType ResultType = mergeTypes(LHSElem, RHSElem, false, Unqualified); 5485 if (ResultType.isNull()) return QualType(); 5486 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 5487 return LHS; 5488 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 5489 return RHS; 5490 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(), 5491 ArrayType::ArraySizeModifier(), 0); 5492 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(), 5493 ArrayType::ArraySizeModifier(), 0); 5494 const VariableArrayType* LVAT = getAsVariableArrayType(LHS); 5495 const VariableArrayType* RVAT = getAsVariableArrayType(RHS); 5496 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 5497 return LHS; 5498 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 5499 return RHS; 5500 if (LVAT) { 5501 // FIXME: This isn't correct! But tricky to implement because 5502 // the array's size has to be the size of LHS, but the type 5503 // has to be different. 5504 return LHS; 5505 } 5506 if (RVAT) { 5507 // FIXME: This isn't correct! But tricky to implement because 5508 // the array's size has to be the size of RHS, but the type 5509 // has to be different. 5510 return RHS; 5511 } 5512 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS; 5513 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS; 5514 return getIncompleteArrayType(ResultType, 5515 ArrayType::ArraySizeModifier(), 0); 5516 } 5517 case Type::FunctionNoProto: 5518 return mergeFunctionTypes(LHS, RHS, OfBlockPointer, Unqualified); 5519 case Type::Record: 5520 case Type::Enum: 5521 return QualType(); 5522 case Type::Builtin: 5523 // Only exactly equal builtin types are compatible, which is tested above. 5524 return QualType(); 5525 case Type::Complex: 5526 // Distinct complex types are incompatible. 5527 return QualType(); 5528 case Type::Vector: 5529 // FIXME: The merged type should be an ExtVector! 5530 if (areCompatVectorTypes(LHSCan->getAs<VectorType>(), 5531 RHSCan->getAs<VectorType>())) 5532 return LHS; 5533 return QualType(); 5534 case Type::ObjCObject: { 5535 // Check if the types are assignment compatible. 5536 // FIXME: This should be type compatibility, e.g. whether 5537 // "LHS x; RHS x;" at global scope is legal. 5538 const ObjCObjectType* LHSIface = LHS->getAs<ObjCObjectType>(); 5539 const ObjCObjectType* RHSIface = RHS->getAs<ObjCObjectType>(); 5540 if (canAssignObjCInterfaces(LHSIface, RHSIface)) 5541 return LHS; 5542 5543 return QualType(); 5544 } 5545 case Type::ObjCObjectPointer: { 5546 if (OfBlockPointer) { 5547 if (canAssignObjCInterfacesInBlockPointer( 5548 LHS->getAs<ObjCObjectPointerType>(), 5549 RHS->getAs<ObjCObjectPointerType>(), 5550 BlockReturnType)) 5551 return LHS; 5552 return QualType(); 5553 } 5554 if (canAssignObjCInterfaces(LHS->getAs<ObjCObjectPointerType>(), 5555 RHS->getAs<ObjCObjectPointerType>())) 5556 return LHS; 5557 5558 return QualType(); 5559 } 5560 } 5561 5562 return QualType(); 5563} 5564 5565/// mergeObjCGCQualifiers - This routine merges ObjC's GC attribute of 'LHS' and 5566/// 'RHS' attributes and returns the merged version; including for function 5567/// return types. 5568QualType ASTContext::mergeObjCGCQualifiers(QualType LHS, QualType RHS) { 5569 QualType LHSCan = getCanonicalType(LHS), 5570 RHSCan = getCanonicalType(RHS); 5571 // If two types are identical, they are compatible. 5572 if (LHSCan == RHSCan) 5573 return LHS; 5574 if (RHSCan->isFunctionType()) { 5575 if (!LHSCan->isFunctionType()) 5576 return QualType(); 5577 QualType OldReturnType = 5578 cast<FunctionType>(RHSCan.getTypePtr())->getResultType(); 5579 QualType NewReturnType = 5580 cast<FunctionType>(LHSCan.getTypePtr())->getResultType(); 5581 QualType ResReturnType = 5582 mergeObjCGCQualifiers(NewReturnType, OldReturnType); 5583 if (ResReturnType.isNull()) 5584 return QualType(); 5585 if (ResReturnType == NewReturnType || ResReturnType == OldReturnType) { 5586 // id foo(); ... __strong id foo(); or: __strong id foo(); ... id foo(); 5587 // In either case, use OldReturnType to build the new function type. 5588 const FunctionType *F = LHS->getAs<FunctionType>(); 5589 if (const FunctionProtoType *FPT = cast<FunctionProtoType>(F)) { 5590 FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); 5591 EPI.ExtInfo = getFunctionExtInfo(LHS); 5592 QualType ResultType 5593 = getFunctionType(OldReturnType, FPT->arg_type_begin(), 5594 FPT->getNumArgs(), EPI); 5595 return ResultType; 5596 } 5597 } 5598 return QualType(); 5599 } 5600 5601 // If the qualifiers are different, the types can still be merged. 5602 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 5603 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 5604 if (LQuals != RQuals) { 5605 // If any of these qualifiers are different, we have a type mismatch. 5606 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 5607 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 5608 return QualType(); 5609 5610 // Exactly one GC qualifier difference is allowed: __strong is 5611 // okay if the other type has no GC qualifier but is an Objective 5612 // C object pointer (i.e. implicitly strong by default). We fix 5613 // this by pretending that the unqualified type was actually 5614 // qualified __strong. 5615 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 5616 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 5617 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 5618 5619 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 5620 return QualType(); 5621 5622 if (GC_L == Qualifiers::Strong) 5623 return LHS; 5624 if (GC_R == Qualifiers::Strong) 5625 return RHS; 5626 return QualType(); 5627 } 5628 5629 if (LHSCan->isObjCObjectPointerType() && RHSCan->isObjCObjectPointerType()) { 5630 QualType LHSBaseQT = LHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 5631 QualType RHSBaseQT = RHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 5632 QualType ResQT = mergeObjCGCQualifiers(LHSBaseQT, RHSBaseQT); 5633 if (ResQT == LHSBaseQT) 5634 return LHS; 5635 if (ResQT == RHSBaseQT) 5636 return RHS; 5637 } 5638 return QualType(); 5639} 5640 5641//===----------------------------------------------------------------------===// 5642// Integer Predicates 5643//===----------------------------------------------------------------------===// 5644 5645unsigned ASTContext::getIntWidth(QualType T) const { 5646 if (const EnumType *ET = dyn_cast<EnumType>(T)) 5647 T = ET->getDecl()->getIntegerType(); 5648 if (T->isBooleanType()) 5649 return 1; 5650 // For builtin types, just use the standard type sizing method 5651 return (unsigned)getTypeSize(T); 5652} 5653 5654QualType ASTContext::getCorrespondingUnsignedType(QualType T) { 5655 assert(T->hasSignedIntegerRepresentation() && "Unexpected type"); 5656 5657 // Turn <4 x signed int> -> <4 x unsigned int> 5658 if (const VectorType *VTy = T->getAs<VectorType>()) 5659 return getVectorType(getCorrespondingUnsignedType(VTy->getElementType()), 5660 VTy->getNumElements(), VTy->getVectorKind()); 5661 5662 // For enums, we return the unsigned version of the base type. 5663 if (const EnumType *ETy = T->getAs<EnumType>()) 5664 T = ETy->getDecl()->getIntegerType(); 5665 5666 const BuiltinType *BTy = T->getAs<BuiltinType>(); 5667 assert(BTy && "Unexpected signed integer type"); 5668 switch (BTy->getKind()) { 5669 case BuiltinType::Char_S: 5670 case BuiltinType::SChar: 5671 return UnsignedCharTy; 5672 case BuiltinType::Short: 5673 return UnsignedShortTy; 5674 case BuiltinType::Int: 5675 return UnsignedIntTy; 5676 case BuiltinType::Long: 5677 return UnsignedLongTy; 5678 case BuiltinType::LongLong: 5679 return UnsignedLongLongTy; 5680 case BuiltinType::Int128: 5681 return UnsignedInt128Ty; 5682 default: 5683 assert(0 && "Unexpected signed integer type"); 5684 return QualType(); 5685 } 5686} 5687 5688ASTMutationListener::~ASTMutationListener() { } 5689 5690 5691//===----------------------------------------------------------------------===// 5692// Builtin Type Computation 5693//===----------------------------------------------------------------------===// 5694 5695/// DecodeTypeFromStr - This decodes one type descriptor from Str, advancing the 5696/// pointer over the consumed characters. This returns the resultant type. If 5697/// AllowTypeModifiers is false then modifier like * are not parsed, just basic 5698/// types. This allows "v2i*" to be parsed as a pointer to a v2i instead of 5699/// a vector of "i*". 5700/// 5701/// RequiresICE is filled in on return to indicate whether the value is required 5702/// to be an Integer Constant Expression. 5703static QualType DecodeTypeFromStr(const char *&Str, const ASTContext &Context, 5704 ASTContext::GetBuiltinTypeError &Error, 5705 bool &RequiresICE, 5706 bool AllowTypeModifiers) { 5707 // Modifiers. 5708 int HowLong = 0; 5709 bool Signed = false, Unsigned = false; 5710 RequiresICE = false; 5711 5712 // Read the prefixed modifiers first. 5713 bool Done = false; 5714 while (!Done) { 5715 switch (*Str++) { 5716 default: Done = true; --Str; break; 5717 case 'I': 5718 RequiresICE = true; 5719 break; 5720 case 'S': 5721 assert(!Unsigned && "Can't use both 'S' and 'U' modifiers!"); 5722 assert(!Signed && "Can't use 'S' modifier multiple times!"); 5723 Signed = true; 5724 break; 5725 case 'U': 5726 assert(!Signed && "Can't use both 'S' and 'U' modifiers!"); 5727 assert(!Unsigned && "Can't use 'S' modifier multiple times!"); 5728 Unsigned = true; 5729 break; 5730 case 'L': 5731 assert(HowLong <= 2 && "Can't have LLLL modifier"); 5732 ++HowLong; 5733 break; 5734 } 5735 } 5736 5737 QualType Type; 5738 5739 // Read the base type. 5740 switch (*Str++) { 5741 default: assert(0 && "Unknown builtin type letter!"); 5742 case 'v': 5743 assert(HowLong == 0 && !Signed && !Unsigned && 5744 "Bad modifiers used with 'v'!"); 5745 Type = Context.VoidTy; 5746 break; 5747 case 'f': 5748 assert(HowLong == 0 && !Signed && !Unsigned && 5749 "Bad modifiers used with 'f'!"); 5750 Type = Context.FloatTy; 5751 break; 5752 case 'd': 5753 assert(HowLong < 2 && !Signed && !Unsigned && 5754 "Bad modifiers used with 'd'!"); 5755 if (HowLong) 5756 Type = Context.LongDoubleTy; 5757 else 5758 Type = Context.DoubleTy; 5759 break; 5760 case 's': 5761 assert(HowLong == 0 && "Bad modifiers used with 's'!"); 5762 if (Unsigned) 5763 Type = Context.UnsignedShortTy; 5764 else 5765 Type = Context.ShortTy; 5766 break; 5767 case 'i': 5768 if (HowLong == 3) 5769 Type = Unsigned ? Context.UnsignedInt128Ty : Context.Int128Ty; 5770 else if (HowLong == 2) 5771 Type = Unsigned ? Context.UnsignedLongLongTy : Context.LongLongTy; 5772 else if (HowLong == 1) 5773 Type = Unsigned ? Context.UnsignedLongTy : Context.LongTy; 5774 else 5775 Type = Unsigned ? Context.UnsignedIntTy : Context.IntTy; 5776 break; 5777 case 'c': 5778 assert(HowLong == 0 && "Bad modifiers used with 'c'!"); 5779 if (Signed) 5780 Type = Context.SignedCharTy; 5781 else if (Unsigned) 5782 Type = Context.UnsignedCharTy; 5783 else 5784 Type = Context.CharTy; 5785 break; 5786 case 'b': // boolean 5787 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'b'!"); 5788 Type = Context.BoolTy; 5789 break; 5790 case 'z': // size_t. 5791 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'z'!"); 5792 Type = Context.getSizeType(); 5793 break; 5794 case 'F': 5795 Type = Context.getCFConstantStringType(); 5796 break; 5797 case 'G': 5798 Type = Context.getObjCIdType(); 5799 break; 5800 case 'H': 5801 Type = Context.getObjCSelType(); 5802 break; 5803 case 'a': 5804 Type = Context.getBuiltinVaListType(); 5805 assert(!Type.isNull() && "builtin va list type not initialized!"); 5806 break; 5807 case 'A': 5808 // This is a "reference" to a va_list; however, what exactly 5809 // this means depends on how va_list is defined. There are two 5810 // different kinds of va_list: ones passed by value, and ones 5811 // passed by reference. An example of a by-value va_list is 5812 // x86, where va_list is a char*. An example of by-ref va_list 5813 // is x86-64, where va_list is a __va_list_tag[1]. For x86, 5814 // we want this argument to be a char*&; for x86-64, we want 5815 // it to be a __va_list_tag*. 5816 Type = Context.getBuiltinVaListType(); 5817 assert(!Type.isNull() && "builtin va list type not initialized!"); 5818 if (Type->isArrayType()) 5819 Type = Context.getArrayDecayedType(Type); 5820 else 5821 Type = Context.getLValueReferenceType(Type); 5822 break; 5823 case 'V': { 5824 char *End; 5825 unsigned NumElements = strtoul(Str, &End, 10); 5826 assert(End != Str && "Missing vector size"); 5827 Str = End; 5828 5829 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, 5830 RequiresICE, false); 5831 assert(!RequiresICE && "Can't require vector ICE"); 5832 5833 // TODO: No way to make AltiVec vectors in builtins yet. 5834 Type = Context.getVectorType(ElementType, NumElements, 5835 VectorType::GenericVector); 5836 break; 5837 } 5838 case 'X': { 5839 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, RequiresICE, 5840 false); 5841 assert(!RequiresICE && "Can't require complex ICE"); 5842 Type = Context.getComplexType(ElementType); 5843 break; 5844 } 5845 case 'P': 5846 Type = Context.getFILEType(); 5847 if (Type.isNull()) { 5848 Error = ASTContext::GE_Missing_stdio; 5849 return QualType(); 5850 } 5851 break; 5852 case 'J': 5853 if (Signed) 5854 Type = Context.getsigjmp_bufType(); 5855 else 5856 Type = Context.getjmp_bufType(); 5857 5858 if (Type.isNull()) { 5859 Error = ASTContext::GE_Missing_setjmp; 5860 return QualType(); 5861 } 5862 break; 5863 } 5864 5865 // If there are modifiers and if we're allowed to parse them, go for it. 5866 Done = !AllowTypeModifiers; 5867 while (!Done) { 5868 switch (char c = *Str++) { 5869 default: Done = true; --Str; break; 5870 case '*': 5871 case '&': { 5872 // Both pointers and references can have their pointee types 5873 // qualified with an address space. 5874 char *End; 5875 unsigned AddrSpace = strtoul(Str, &End, 10); 5876 if (End != Str && AddrSpace != 0) { 5877 Type = Context.getAddrSpaceQualType(Type, AddrSpace); 5878 Str = End; 5879 } 5880 if (c == '*') 5881 Type = Context.getPointerType(Type); 5882 else 5883 Type = Context.getLValueReferenceType(Type); 5884 break; 5885 } 5886 // FIXME: There's no way to have a built-in with an rvalue ref arg. 5887 case 'C': 5888 Type = Type.withConst(); 5889 break; 5890 case 'D': 5891 Type = Context.getVolatileType(Type); 5892 break; 5893 } 5894 } 5895 5896 assert((!RequiresICE || Type->isIntegralOrEnumerationType()) && 5897 "Integer constant 'I' type must be an integer"); 5898 5899 return Type; 5900} 5901 5902/// GetBuiltinType - Return the type for the specified builtin. 5903QualType ASTContext::GetBuiltinType(unsigned Id, 5904 GetBuiltinTypeError &Error, 5905 unsigned *IntegerConstantArgs) const { 5906 const char *TypeStr = BuiltinInfo.GetTypeString(Id); 5907 5908 llvm::SmallVector<QualType, 8> ArgTypes; 5909 5910 bool RequiresICE = false; 5911 Error = GE_None; 5912 QualType ResType = DecodeTypeFromStr(TypeStr, *this, Error, 5913 RequiresICE, true); 5914 if (Error != GE_None) 5915 return QualType(); 5916 5917 assert(!RequiresICE && "Result of intrinsic cannot be required to be an ICE"); 5918 5919 while (TypeStr[0] && TypeStr[0] != '.') { 5920 QualType Ty = DecodeTypeFromStr(TypeStr, *this, Error, RequiresICE, true); 5921 if (Error != GE_None) 5922 return QualType(); 5923 5924 // If this argument is required to be an IntegerConstantExpression and the 5925 // caller cares, fill in the bitmask we return. 5926 if (RequiresICE && IntegerConstantArgs) 5927 *IntegerConstantArgs |= 1 << ArgTypes.size(); 5928 5929 // Do array -> pointer decay. The builtin should use the decayed type. 5930 if (Ty->isArrayType()) 5931 Ty = getArrayDecayedType(Ty); 5932 5933 ArgTypes.push_back(Ty); 5934 } 5935 5936 assert((TypeStr[0] != '.' || TypeStr[1] == 0) && 5937 "'.' should only occur at end of builtin type list!"); 5938 5939 FunctionType::ExtInfo EI; 5940 if (BuiltinInfo.isNoReturn(Id)) EI = EI.withNoReturn(true); 5941 5942 bool Variadic = (TypeStr[0] == '.'); 5943 5944 // We really shouldn't be making a no-proto type here, especially in C++. 5945 if (ArgTypes.empty() && Variadic) 5946 return getFunctionNoProtoType(ResType, EI); 5947 5948 FunctionProtoType::ExtProtoInfo EPI; 5949 EPI.ExtInfo = EI; 5950 EPI.Variadic = Variadic; 5951 5952 return getFunctionType(ResType, ArgTypes.data(), ArgTypes.size(), EPI); 5953} 5954 5955GVALinkage ASTContext::GetGVALinkageForFunction(const FunctionDecl *FD) { 5956 GVALinkage External = GVA_StrongExternal; 5957 5958 Linkage L = FD->getLinkage(); 5959 switch (L) { 5960 case NoLinkage: 5961 case InternalLinkage: 5962 case UniqueExternalLinkage: 5963 return GVA_Internal; 5964 5965 case ExternalLinkage: 5966 switch (FD->getTemplateSpecializationKind()) { 5967 case TSK_Undeclared: 5968 case TSK_ExplicitSpecialization: 5969 External = GVA_StrongExternal; 5970 break; 5971 5972 case TSK_ExplicitInstantiationDefinition: 5973 return GVA_ExplicitTemplateInstantiation; 5974 5975 case TSK_ExplicitInstantiationDeclaration: 5976 case TSK_ImplicitInstantiation: 5977 External = GVA_TemplateInstantiation; 5978 break; 5979 } 5980 } 5981 5982 if (!FD->isInlined()) 5983 return External; 5984 5985 if (!getLangOptions().CPlusPlus || FD->hasAttr<GNUInlineAttr>()) { 5986 // GNU or C99 inline semantics. Determine whether this symbol should be 5987 // externally visible. 5988 if (FD->isInlineDefinitionExternallyVisible()) 5989 return External; 5990 5991 // C99 inline semantics, where the symbol is not externally visible. 5992 return GVA_C99Inline; 5993 } 5994 5995 // C++0x [temp.explicit]p9: 5996 // [ Note: The intent is that an inline function that is the subject of 5997 // an explicit instantiation declaration will still be implicitly 5998 // instantiated when used so that the body can be considered for 5999 // inlining, but that no out-of-line copy of the inline function would be 6000 // generated in the translation unit. -- end note ] 6001 if (FD->getTemplateSpecializationKind() 6002 == TSK_ExplicitInstantiationDeclaration) 6003 return GVA_C99Inline; 6004 6005 return GVA_CXXInline; 6006} 6007 6008GVALinkage ASTContext::GetGVALinkageForVariable(const VarDecl *VD) { 6009 // If this is a static data member, compute the kind of template 6010 // specialization. Otherwise, this variable is not part of a 6011 // template. 6012 TemplateSpecializationKind TSK = TSK_Undeclared; 6013 if (VD->isStaticDataMember()) 6014 TSK = VD->getTemplateSpecializationKind(); 6015 6016 Linkage L = VD->getLinkage(); 6017 if (L == ExternalLinkage && getLangOptions().CPlusPlus && 6018 VD->getType()->getLinkage() == UniqueExternalLinkage) 6019 L = UniqueExternalLinkage; 6020 6021 switch (L) { 6022 case NoLinkage: 6023 case InternalLinkage: 6024 case UniqueExternalLinkage: 6025 return GVA_Internal; 6026 6027 case ExternalLinkage: 6028 switch (TSK) { 6029 case TSK_Undeclared: 6030 case TSK_ExplicitSpecialization: 6031 return GVA_StrongExternal; 6032 6033 case TSK_ExplicitInstantiationDeclaration: 6034 llvm_unreachable("Variable should not be instantiated"); 6035 // Fall through to treat this like any other instantiation. 6036 6037 case TSK_ExplicitInstantiationDefinition: 6038 return GVA_ExplicitTemplateInstantiation; 6039 6040 case TSK_ImplicitInstantiation: 6041 return GVA_TemplateInstantiation; 6042 } 6043 } 6044 6045 return GVA_StrongExternal; 6046} 6047 6048bool ASTContext::DeclMustBeEmitted(const Decl *D) { 6049 if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { 6050 if (!VD->isFileVarDecl()) 6051 return false; 6052 } else if (!isa<FunctionDecl>(D)) 6053 return false; 6054 6055 // Weak references don't produce any output by themselves. 6056 if (D->hasAttr<WeakRefAttr>()) 6057 return false; 6058 6059 // Aliases and used decls are required. 6060 if (D->hasAttr<AliasAttr>() || D->hasAttr<UsedAttr>()) 6061 return true; 6062 6063 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 6064 // Forward declarations aren't required. 6065 if (!FD->isThisDeclarationADefinition()) 6066 return false; 6067 6068 // Constructors and destructors are required. 6069 if (FD->hasAttr<ConstructorAttr>() || FD->hasAttr<DestructorAttr>()) 6070 return true; 6071 6072 // The key function for a class is required. 6073 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { 6074 const CXXRecordDecl *RD = MD->getParent(); 6075 if (MD->isOutOfLine() && RD->isDynamicClass()) { 6076 const CXXMethodDecl *KeyFunc = getKeyFunction(RD); 6077 if (KeyFunc && KeyFunc->getCanonicalDecl() == MD->getCanonicalDecl()) 6078 return true; 6079 } 6080 } 6081 6082 GVALinkage Linkage = GetGVALinkageForFunction(FD); 6083 6084 // static, static inline, always_inline, and extern inline functions can 6085 // always be deferred. Normal inline functions can be deferred in C99/C++. 6086 // Implicit template instantiations can also be deferred in C++. 6087 if (Linkage == GVA_Internal || Linkage == GVA_C99Inline || 6088 Linkage == GVA_CXXInline || Linkage == GVA_TemplateInstantiation) 6089 return false; 6090 return true; 6091 } 6092 6093 const VarDecl *VD = cast<VarDecl>(D); 6094 assert(VD->isFileVarDecl() && "Expected file scoped var"); 6095 6096 if (VD->isThisDeclarationADefinition() == VarDecl::DeclarationOnly) 6097 return false; 6098 6099 // Structs that have non-trivial constructors or destructors are required. 6100 6101 // FIXME: Handle references. 6102 if (const RecordType *RT = VD->getType()->getAs<RecordType>()) { 6103 if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(RT->getDecl())) { 6104 if (RD->hasDefinition() && 6105 (!RD->hasTrivialConstructor() || !RD->hasTrivialDestructor())) 6106 return true; 6107 } 6108 } 6109 6110 GVALinkage L = GetGVALinkageForVariable(VD); 6111 if (L == GVA_Internal || L == GVA_TemplateInstantiation) { 6112 if (!(VD->getInit() && VD->getInit()->HasSideEffects(*this))) 6113 return false; 6114 } 6115 6116 return true; 6117} 6118 6119CallingConv ASTContext::getDefaultMethodCallConv() { 6120 // Pass through to the C++ ABI object 6121 return ABI->getDefaultMethodCallConv(); 6122} 6123 6124bool ASTContext::isNearlyEmpty(const CXXRecordDecl *RD) const { 6125 // Pass through to the C++ ABI object 6126 return ABI->isNearlyEmpty(RD); 6127} 6128 6129MangleContext *ASTContext::createMangleContext() { 6130 switch (Target.getCXXABI()) { 6131 case CXXABI_ARM: 6132 case CXXABI_Itanium: 6133 return createItaniumMangleContext(*this, getDiagnostics()); 6134 case CXXABI_Microsoft: 6135 return createMicrosoftMangleContext(*this, getDiagnostics()); 6136 } 6137 assert(0 && "Unsupported ABI"); 6138 return 0; 6139} 6140 6141CXXABI::~CXXABI() {} 6142 6143size_t ASTContext::getSideTableAllocatedMemory() const { 6144 size_t bytes = 0; 6145 bytes += ASTRecordLayouts.getMemorySize(); 6146 bytes += ObjCLayouts.getMemorySize(); 6147 bytes += KeyFunctions.getMemorySize(); 6148 bytes += ObjCImpls.getMemorySize(); 6149 bytes += BlockVarCopyInits.getMemorySize(); 6150 bytes += DeclAttrs.getMemorySize(); 6151 bytes += InstantiatedFromStaticDataMember.getMemorySize(); 6152 bytes += InstantiatedFromUsingDecl.getMemorySize(); 6153 bytes += InstantiatedFromUsingShadowDecl.getMemorySize(); 6154 bytes += InstantiatedFromUnnamedFieldDecl.getMemorySize(); 6155 return bytes; 6156} 6157 6158