ASTContext.cpp revision b7bc34a83aff8af09f2a78aa6d1dcafe18ad8619
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 (!LangOpts.ShortWChar) 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 // "any" type; useful for debugger-like clients. 406 InitBuiltinType(UnknownAnyTy, BuiltinType::UnknownAny); 407 408 // C99 6.2.5p11. 409 FloatComplexTy = getComplexType(FloatTy); 410 DoubleComplexTy = getComplexType(DoubleTy); 411 LongDoubleComplexTy = getComplexType(LongDoubleTy); 412 413 BuiltinVaListType = QualType(); 414 415 // "Builtin" typedefs set by Sema::ActOnTranslationUnitScope(). 416 ObjCIdTypedefType = QualType(); 417 ObjCClassTypedefType = QualType(); 418 ObjCSelTypedefType = QualType(); 419 420 // Builtin types for 'id', 'Class', and 'SEL'. 421 InitBuiltinType(ObjCBuiltinIdTy, BuiltinType::ObjCId); 422 InitBuiltinType(ObjCBuiltinClassTy, BuiltinType::ObjCClass); 423 InitBuiltinType(ObjCBuiltinSelTy, BuiltinType::ObjCSel); 424 425 ObjCConstantStringType = QualType(); 426 427 // void * type 428 VoidPtrTy = getPointerType(VoidTy); 429 430 // nullptr type (C++0x 2.14.7) 431 InitBuiltinType(NullPtrTy, BuiltinType::NullPtr); 432} 433 434Diagnostic &ASTContext::getDiagnostics() const { 435 return SourceMgr.getDiagnostics(); 436} 437 438AttrVec& ASTContext::getDeclAttrs(const Decl *D) { 439 AttrVec *&Result = DeclAttrs[D]; 440 if (!Result) { 441 void *Mem = Allocate(sizeof(AttrVec)); 442 Result = new (Mem) AttrVec; 443 } 444 445 return *Result; 446} 447 448/// \brief Erase the attributes corresponding to the given declaration. 449void ASTContext::eraseDeclAttrs(const Decl *D) { 450 llvm::DenseMap<const Decl*, AttrVec*>::iterator Pos = DeclAttrs.find(D); 451 if (Pos != DeclAttrs.end()) { 452 Pos->second->~AttrVec(); 453 DeclAttrs.erase(Pos); 454 } 455} 456 457MemberSpecializationInfo * 458ASTContext::getInstantiatedFromStaticDataMember(const VarDecl *Var) { 459 assert(Var->isStaticDataMember() && "Not a static data member"); 460 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *>::iterator Pos 461 = InstantiatedFromStaticDataMember.find(Var); 462 if (Pos == InstantiatedFromStaticDataMember.end()) 463 return 0; 464 465 return Pos->second; 466} 467 468void 469ASTContext::setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 470 TemplateSpecializationKind TSK, 471 SourceLocation PointOfInstantiation) { 472 assert(Inst->isStaticDataMember() && "Not a static data member"); 473 assert(Tmpl->isStaticDataMember() && "Not a static data member"); 474 assert(!InstantiatedFromStaticDataMember[Inst] && 475 "Already noted what static data member was instantiated from"); 476 InstantiatedFromStaticDataMember[Inst] 477 = new (*this) MemberSpecializationInfo(Tmpl, TSK, PointOfInstantiation); 478} 479 480NamedDecl * 481ASTContext::getInstantiatedFromUsingDecl(UsingDecl *UUD) { 482 llvm::DenseMap<UsingDecl *, NamedDecl *>::const_iterator Pos 483 = InstantiatedFromUsingDecl.find(UUD); 484 if (Pos == InstantiatedFromUsingDecl.end()) 485 return 0; 486 487 return Pos->second; 488} 489 490void 491ASTContext::setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern) { 492 assert((isa<UsingDecl>(Pattern) || 493 isa<UnresolvedUsingValueDecl>(Pattern) || 494 isa<UnresolvedUsingTypenameDecl>(Pattern)) && 495 "pattern decl is not a using decl"); 496 assert(!InstantiatedFromUsingDecl[Inst] && "pattern already exists"); 497 InstantiatedFromUsingDecl[Inst] = Pattern; 498} 499 500UsingShadowDecl * 501ASTContext::getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst) { 502 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*>::const_iterator Pos 503 = InstantiatedFromUsingShadowDecl.find(Inst); 504 if (Pos == InstantiatedFromUsingShadowDecl.end()) 505 return 0; 506 507 return Pos->second; 508} 509 510void 511ASTContext::setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 512 UsingShadowDecl *Pattern) { 513 assert(!InstantiatedFromUsingShadowDecl[Inst] && "pattern already exists"); 514 InstantiatedFromUsingShadowDecl[Inst] = Pattern; 515} 516 517FieldDecl *ASTContext::getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field) { 518 llvm::DenseMap<FieldDecl *, FieldDecl *>::iterator Pos 519 = InstantiatedFromUnnamedFieldDecl.find(Field); 520 if (Pos == InstantiatedFromUnnamedFieldDecl.end()) 521 return 0; 522 523 return Pos->second; 524} 525 526void ASTContext::setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, 527 FieldDecl *Tmpl) { 528 assert(!Inst->getDeclName() && "Instantiated field decl is not unnamed"); 529 assert(!Tmpl->getDeclName() && "Template field decl is not unnamed"); 530 assert(!InstantiatedFromUnnamedFieldDecl[Inst] && 531 "Already noted what unnamed field was instantiated from"); 532 533 InstantiatedFromUnnamedFieldDecl[Inst] = Tmpl; 534} 535 536ASTContext::overridden_cxx_method_iterator 537ASTContext::overridden_methods_begin(const CXXMethodDecl *Method) const { 538 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 539 = OverriddenMethods.find(Method); 540 if (Pos == OverriddenMethods.end()) 541 return 0; 542 543 return Pos->second.begin(); 544} 545 546ASTContext::overridden_cxx_method_iterator 547ASTContext::overridden_methods_end(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.end(); 554} 555 556unsigned 557ASTContext::overridden_methods_size(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.size(); 564} 565 566void ASTContext::addOverriddenMethod(const CXXMethodDecl *Method, 567 const CXXMethodDecl *Overridden) { 568 OverriddenMethods[Method].push_back(Overridden); 569} 570 571//===----------------------------------------------------------------------===// 572// Type Sizing and Analysis 573//===----------------------------------------------------------------------===// 574 575/// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 576/// scalar floating point type. 577const llvm::fltSemantics &ASTContext::getFloatTypeSemantics(QualType T) const { 578 const BuiltinType *BT = T->getAs<BuiltinType>(); 579 assert(BT && "Not a floating point type!"); 580 switch (BT->getKind()) { 581 default: assert(0 && "Not a floating point type!"); 582 case BuiltinType::Float: return Target.getFloatFormat(); 583 case BuiltinType::Double: return Target.getDoubleFormat(); 584 case BuiltinType::LongDouble: return Target.getLongDoubleFormat(); 585 } 586} 587 588/// getDeclAlign - Return a conservative estimate of the alignment of the 589/// specified decl. Note that bitfields do not have a valid alignment, so 590/// this method will assert on them. 591/// If @p RefAsPointee, references are treated like their underlying type 592/// (for alignof), else they're treated like pointers (for CodeGen). 593CharUnits ASTContext::getDeclAlign(const Decl *D, bool RefAsPointee) const { 594 unsigned Align = Target.getCharWidth(); 595 596 bool UseAlignAttrOnly = false; 597 if (unsigned AlignFromAttr = D->getMaxAlignment()) { 598 Align = AlignFromAttr; 599 600 // __attribute__((aligned)) can increase or decrease alignment 601 // *except* on a struct or struct member, where it only increases 602 // alignment unless 'packed' is also specified. 603 // 604 // It is an error for [[align]] to decrease alignment, so we can 605 // ignore that possibility; Sema should diagnose it. 606 if (isa<FieldDecl>(D)) { 607 UseAlignAttrOnly = D->hasAttr<PackedAttr>() || 608 cast<FieldDecl>(D)->getParent()->hasAttr<PackedAttr>(); 609 } else { 610 UseAlignAttrOnly = true; 611 } 612 } 613 614 // If we're using the align attribute only, just ignore everything 615 // else about the declaration and its type. 616 if (UseAlignAttrOnly) { 617 // do nothing 618 619 } else if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) { 620 QualType T = VD->getType(); 621 if (const ReferenceType* RT = T->getAs<ReferenceType>()) { 622 if (RefAsPointee) 623 T = RT->getPointeeType(); 624 else 625 T = getPointerType(RT->getPointeeType()); 626 } 627 if (!T->isIncompleteType() && !T->isFunctionType()) { 628 // Adjust alignments of declarations with array type by the 629 // large-array alignment on the target. 630 unsigned MinWidth = Target.getLargeArrayMinWidth(); 631 const ArrayType *arrayType; 632 if (MinWidth && (arrayType = getAsArrayType(T))) { 633 if (isa<VariableArrayType>(arrayType)) 634 Align = std::max(Align, Target.getLargeArrayAlign()); 635 else if (isa<ConstantArrayType>(arrayType) && 636 MinWidth <= getTypeSize(cast<ConstantArrayType>(arrayType))) 637 Align = std::max(Align, Target.getLargeArrayAlign()); 638 639 // Walk through any array types while we're at it. 640 T = getBaseElementType(arrayType); 641 } 642 Align = std::max(Align, getPreferredTypeAlign(T.getTypePtr())); 643 } 644 645 // Fields can be subject to extra alignment constraints, like if 646 // the field is packed, the struct is packed, or the struct has a 647 // a max-field-alignment constraint (#pragma pack). So calculate 648 // the actual alignment of the field within the struct, and then 649 // (as we're expected to) constrain that by the alignment of the type. 650 if (const FieldDecl *field = dyn_cast<FieldDecl>(VD)) { 651 // So calculate the alignment of the field. 652 const ASTRecordLayout &layout = getASTRecordLayout(field->getParent()); 653 654 // Start with the record's overall alignment. 655 unsigned fieldAlign = toBits(layout.getAlignment()); 656 657 // Use the GCD of that and the offset within the record. 658 uint64_t offset = layout.getFieldOffset(field->getFieldIndex()); 659 if (offset > 0) { 660 // Alignment is always a power of 2, so the GCD will be a power of 2, 661 // which means we get to do this crazy thing instead of Euclid's. 662 uint64_t lowBitOfOffset = offset & (~offset + 1); 663 if (lowBitOfOffset < fieldAlign) 664 fieldAlign = static_cast<unsigned>(lowBitOfOffset); 665 } 666 667 Align = std::min(Align, fieldAlign); 668 } 669 } 670 671 return toCharUnitsFromBits(Align); 672} 673 674std::pair<CharUnits, CharUnits> 675ASTContext::getTypeInfoInChars(const Type *T) const { 676 std::pair<uint64_t, unsigned> Info = getTypeInfo(T); 677 return std::make_pair(toCharUnitsFromBits(Info.first), 678 toCharUnitsFromBits(Info.second)); 679} 680 681std::pair<CharUnits, CharUnits> 682ASTContext::getTypeInfoInChars(QualType T) const { 683 return getTypeInfoInChars(T.getTypePtr()); 684} 685 686/// getTypeSize - Return the size of the specified type, in bits. This method 687/// does not work on incomplete types. 688/// 689/// FIXME: Pointers into different addr spaces could have different sizes and 690/// alignment requirements: getPointerInfo should take an AddrSpace, this 691/// should take a QualType, &c. 692std::pair<uint64_t, unsigned> 693ASTContext::getTypeInfo(const Type *T) const { 694 uint64_t Width=0; 695 unsigned Align=8; 696 switch (T->getTypeClass()) { 697#define TYPE(Class, Base) 698#define ABSTRACT_TYPE(Class, Base) 699#define NON_CANONICAL_TYPE(Class, Base) 700#define DEPENDENT_TYPE(Class, Base) case Type::Class: 701#include "clang/AST/TypeNodes.def" 702 assert(false && "Should not see dependent types"); 703 break; 704 705 case Type::FunctionNoProto: 706 case Type::FunctionProto: 707 // GCC extension: alignof(function) = 32 bits 708 Width = 0; 709 Align = 32; 710 break; 711 712 case Type::IncompleteArray: 713 case Type::VariableArray: 714 Width = 0; 715 Align = getTypeAlign(cast<ArrayType>(T)->getElementType()); 716 break; 717 718 case Type::ConstantArray: { 719 const ConstantArrayType *CAT = cast<ConstantArrayType>(T); 720 721 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(CAT->getElementType()); 722 Width = EltInfo.first*CAT->getSize().getZExtValue(); 723 Align = EltInfo.second; 724 break; 725 } 726 case Type::ExtVector: 727 case Type::Vector: { 728 const VectorType *VT = cast<VectorType>(T); 729 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(VT->getElementType()); 730 Width = EltInfo.first*VT->getNumElements(); 731 Align = Width; 732 // If the alignment is not a power of 2, round up to the next power of 2. 733 // This happens for non-power-of-2 length vectors. 734 if (Align & (Align-1)) { 735 Align = llvm::NextPowerOf2(Align); 736 Width = llvm::RoundUpToAlignment(Width, Align); 737 } 738 break; 739 } 740 741 case Type::Builtin: 742 switch (cast<BuiltinType>(T)->getKind()) { 743 default: assert(0 && "Unknown builtin type!"); 744 case BuiltinType::Void: 745 // GCC extension: alignof(void) = 8 bits. 746 Width = 0; 747 Align = 8; 748 break; 749 750 case BuiltinType::Bool: 751 Width = Target.getBoolWidth(); 752 Align = Target.getBoolAlign(); 753 break; 754 case BuiltinType::Char_S: 755 case BuiltinType::Char_U: 756 case BuiltinType::UChar: 757 case BuiltinType::SChar: 758 Width = Target.getCharWidth(); 759 Align = Target.getCharAlign(); 760 break; 761 case BuiltinType::WChar_S: 762 case BuiltinType::WChar_U: 763 Width = Target.getWCharWidth(); 764 Align = Target.getWCharAlign(); 765 break; 766 case BuiltinType::Char16: 767 Width = Target.getChar16Width(); 768 Align = Target.getChar16Align(); 769 break; 770 case BuiltinType::Char32: 771 Width = Target.getChar32Width(); 772 Align = Target.getChar32Align(); 773 break; 774 case BuiltinType::UShort: 775 case BuiltinType::Short: 776 Width = Target.getShortWidth(); 777 Align = Target.getShortAlign(); 778 break; 779 case BuiltinType::UInt: 780 case BuiltinType::Int: 781 Width = Target.getIntWidth(); 782 Align = Target.getIntAlign(); 783 break; 784 case BuiltinType::ULong: 785 case BuiltinType::Long: 786 Width = Target.getLongWidth(); 787 Align = Target.getLongAlign(); 788 break; 789 case BuiltinType::ULongLong: 790 case BuiltinType::LongLong: 791 Width = Target.getLongLongWidth(); 792 Align = Target.getLongLongAlign(); 793 break; 794 case BuiltinType::Int128: 795 case BuiltinType::UInt128: 796 Width = 128; 797 Align = 128; // int128_t is 128-bit aligned on all targets. 798 break; 799 case BuiltinType::Float: 800 Width = Target.getFloatWidth(); 801 Align = Target.getFloatAlign(); 802 break; 803 case BuiltinType::Double: 804 Width = Target.getDoubleWidth(); 805 Align = Target.getDoubleAlign(); 806 break; 807 case BuiltinType::LongDouble: 808 Width = Target.getLongDoubleWidth(); 809 Align = Target.getLongDoubleAlign(); 810 break; 811 case BuiltinType::NullPtr: 812 Width = Target.getPointerWidth(0); // C++ 3.9.1p11: sizeof(nullptr_t) 813 Align = Target.getPointerAlign(0); // == sizeof(void*) 814 break; 815 case BuiltinType::ObjCId: 816 case BuiltinType::ObjCClass: 817 case BuiltinType::ObjCSel: 818 Width = Target.getPointerWidth(0); 819 Align = Target.getPointerAlign(0); 820 break; 821 } 822 break; 823 case Type::ObjCObjectPointer: 824 Width = Target.getPointerWidth(0); 825 Align = Target.getPointerAlign(0); 826 break; 827 case Type::BlockPointer: { 828 unsigned AS = getTargetAddressSpace( 829 cast<BlockPointerType>(T)->getPointeeType()); 830 Width = Target.getPointerWidth(AS); 831 Align = Target.getPointerAlign(AS); 832 break; 833 } 834 case Type::LValueReference: 835 case Type::RValueReference: { 836 // alignof and sizeof should never enter this code path here, so we go 837 // the pointer route. 838 unsigned AS = getTargetAddressSpace( 839 cast<ReferenceType>(T)->getPointeeType()); 840 Width = Target.getPointerWidth(AS); 841 Align = Target.getPointerAlign(AS); 842 break; 843 } 844 case Type::Pointer: { 845 unsigned AS = getTargetAddressSpace(cast<PointerType>(T)->getPointeeType()); 846 Width = Target.getPointerWidth(AS); 847 Align = Target.getPointerAlign(AS); 848 break; 849 } 850 case Type::MemberPointer: { 851 const MemberPointerType *MPT = cast<MemberPointerType>(T); 852 std::pair<uint64_t, unsigned> PtrDiffInfo = 853 getTypeInfo(getPointerDiffType()); 854 Width = PtrDiffInfo.first * ABI->getMemberPointerSize(MPT); 855 Align = PtrDiffInfo.second; 856 break; 857 } 858 case Type::Complex: { 859 // Complex types have the same alignment as their elements, but twice the 860 // size. 861 std::pair<uint64_t, unsigned> EltInfo = 862 getTypeInfo(cast<ComplexType>(T)->getElementType()); 863 Width = EltInfo.first*2; 864 Align = EltInfo.second; 865 break; 866 } 867 case Type::ObjCObject: 868 return getTypeInfo(cast<ObjCObjectType>(T)->getBaseType().getTypePtr()); 869 case Type::ObjCInterface: { 870 const ObjCInterfaceType *ObjCI = cast<ObjCInterfaceType>(T); 871 const ASTRecordLayout &Layout = getASTObjCInterfaceLayout(ObjCI->getDecl()); 872 Width = toBits(Layout.getSize()); 873 Align = toBits(Layout.getAlignment()); 874 break; 875 } 876 case Type::Record: 877 case Type::Enum: { 878 const TagType *TT = cast<TagType>(T); 879 880 if (TT->getDecl()->isInvalidDecl()) { 881 Width = 1; 882 Align = 1; 883 break; 884 } 885 886 if (const EnumType *ET = dyn_cast<EnumType>(TT)) 887 return getTypeInfo(ET->getDecl()->getIntegerType()); 888 889 const RecordType *RT = cast<RecordType>(TT); 890 const ASTRecordLayout &Layout = getASTRecordLayout(RT->getDecl()); 891 Width = toBits(Layout.getSize()); 892 Align = toBits(Layout.getAlignment()); 893 break; 894 } 895 896 case Type::SubstTemplateTypeParm: 897 return getTypeInfo(cast<SubstTemplateTypeParmType>(T)-> 898 getReplacementType().getTypePtr()); 899 900 case Type::Auto: { 901 const AutoType *A = cast<AutoType>(T); 902 assert(A->isDeduced() && "Cannot request the size of a dependent type"); 903 return getTypeInfo(A->getDeducedType().getTypePtr()); 904 } 905 906 case Type::Paren: 907 return getTypeInfo(cast<ParenType>(T)->getInnerType().getTypePtr()); 908 909 case Type::Typedef: { 910 const TypedefDecl *Typedef = cast<TypedefType>(T)->getDecl(); 911 std::pair<uint64_t, unsigned> Info 912 = getTypeInfo(Typedef->getUnderlyingType().getTypePtr()); 913 // If the typedef has an aligned attribute on it, it overrides any computed 914 // alignment we have. This violates the GCC documentation (which says that 915 // attribute(aligned) can only round up) but matches its implementation. 916 if (unsigned AttrAlign = Typedef->getMaxAlignment()) 917 Align = AttrAlign; 918 else 919 Align = Info.second; 920 Width = Info.first; 921 break; 922 } 923 924 case Type::TypeOfExpr: 925 return getTypeInfo(cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType() 926 .getTypePtr()); 927 928 case Type::TypeOf: 929 return getTypeInfo(cast<TypeOfType>(T)->getUnderlyingType().getTypePtr()); 930 931 case Type::Decltype: 932 return getTypeInfo(cast<DecltypeType>(T)->getUnderlyingExpr()->getType() 933 .getTypePtr()); 934 935 case Type::Elaborated: 936 return getTypeInfo(cast<ElaboratedType>(T)->getNamedType().getTypePtr()); 937 938 case Type::Attributed: 939 return getTypeInfo( 940 cast<AttributedType>(T)->getEquivalentType().getTypePtr()); 941 942 case Type::TemplateSpecialization: 943 assert(getCanonicalType(T) != T && 944 "Cannot request the size of a dependent type"); 945 // FIXME: this is likely to be wrong once we support template 946 // aliases, since a template alias could refer to a typedef that 947 // has an __aligned__ attribute on it. 948 return getTypeInfo(getCanonicalType(T)); 949 } 950 951 assert(Align && (Align & (Align-1)) == 0 && "Alignment must be power of 2"); 952 return std::make_pair(Width, Align); 953} 954 955/// toCharUnitsFromBits - Convert a size in bits to a size in characters. 956CharUnits ASTContext::toCharUnitsFromBits(int64_t BitSize) const { 957 return CharUnits::fromQuantity(BitSize / getCharWidth()); 958} 959 960/// toBits - Convert a size in characters to a size in characters. 961int64_t ASTContext::toBits(CharUnits CharSize) const { 962 return CharSize.getQuantity() * getCharWidth(); 963} 964 965/// getTypeSizeInChars - Return the size of the specified type, in characters. 966/// This method does not work on incomplete types. 967CharUnits ASTContext::getTypeSizeInChars(QualType T) const { 968 return toCharUnitsFromBits(getTypeSize(T)); 969} 970CharUnits ASTContext::getTypeSizeInChars(const Type *T) const { 971 return toCharUnitsFromBits(getTypeSize(T)); 972} 973 974/// getTypeAlignInChars - Return the ABI-specified alignment of a type, in 975/// characters. This method does not work on incomplete types. 976CharUnits ASTContext::getTypeAlignInChars(QualType T) const { 977 return toCharUnitsFromBits(getTypeAlign(T)); 978} 979CharUnits ASTContext::getTypeAlignInChars(const Type *T) const { 980 return toCharUnitsFromBits(getTypeAlign(T)); 981} 982 983/// getPreferredTypeAlign - Return the "preferred" alignment of the specified 984/// type for the current target in bits. This can be different than the ABI 985/// alignment in cases where it is beneficial for performance to overalign 986/// a data type. 987unsigned ASTContext::getPreferredTypeAlign(const Type *T) const { 988 unsigned ABIAlign = getTypeAlign(T); 989 990 // Double and long long should be naturally aligned if possible. 991 if (const ComplexType* CT = T->getAs<ComplexType>()) 992 T = CT->getElementType().getTypePtr(); 993 if (T->isSpecificBuiltinType(BuiltinType::Double) || 994 T->isSpecificBuiltinType(BuiltinType::LongLong)) 995 return std::max(ABIAlign, (unsigned)getTypeSize(T)); 996 997 return ABIAlign; 998} 999 1000/// ShallowCollectObjCIvars - 1001/// Collect all ivars, including those synthesized, in the current class. 1002/// 1003void ASTContext::ShallowCollectObjCIvars(const ObjCInterfaceDecl *OI, 1004 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) const { 1005 // FIXME. This need be removed but there are two many places which 1006 // assume const-ness of ObjCInterfaceDecl 1007 ObjCInterfaceDecl *IDecl = const_cast<ObjCInterfaceDecl *>(OI); 1008 for (ObjCIvarDecl *Iv = IDecl->all_declared_ivar_begin(); Iv; 1009 Iv= Iv->getNextIvar()) 1010 Ivars.push_back(Iv); 1011} 1012 1013/// DeepCollectObjCIvars - 1014/// This routine first collects all declared, but not synthesized, ivars in 1015/// super class and then collects all ivars, including those synthesized for 1016/// current class. This routine is used for implementation of current class 1017/// when all ivars, declared and synthesized are known. 1018/// 1019void ASTContext::DeepCollectObjCIvars(const ObjCInterfaceDecl *OI, 1020 bool leafClass, 1021 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) const { 1022 if (const ObjCInterfaceDecl *SuperClass = OI->getSuperClass()) 1023 DeepCollectObjCIvars(SuperClass, false, Ivars); 1024 if (!leafClass) { 1025 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 1026 E = OI->ivar_end(); I != E; ++I) 1027 Ivars.push_back(*I); 1028 } 1029 else 1030 ShallowCollectObjCIvars(OI, Ivars); 1031} 1032 1033/// CollectInheritedProtocols - Collect all protocols in current class and 1034/// those inherited by it. 1035void ASTContext::CollectInheritedProtocols(const Decl *CDecl, 1036 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols) { 1037 if (const ObjCInterfaceDecl *OI = dyn_cast<ObjCInterfaceDecl>(CDecl)) { 1038 // We can use protocol_iterator here instead of 1039 // all_referenced_protocol_iterator since we are walking all categories. 1040 for (ObjCInterfaceDecl::all_protocol_iterator P = OI->all_referenced_protocol_begin(), 1041 PE = OI->all_referenced_protocol_end(); P != PE; ++P) { 1042 ObjCProtocolDecl *Proto = (*P); 1043 Protocols.insert(Proto); 1044 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1045 PE = Proto->protocol_end(); P != PE; ++P) { 1046 Protocols.insert(*P); 1047 CollectInheritedProtocols(*P, Protocols); 1048 } 1049 } 1050 1051 // Categories of this Interface. 1052 for (const ObjCCategoryDecl *CDeclChain = OI->getCategoryList(); 1053 CDeclChain; CDeclChain = CDeclChain->getNextClassCategory()) 1054 CollectInheritedProtocols(CDeclChain, Protocols); 1055 if (ObjCInterfaceDecl *SD = OI->getSuperClass()) 1056 while (SD) { 1057 CollectInheritedProtocols(SD, Protocols); 1058 SD = SD->getSuperClass(); 1059 } 1060 } else if (const ObjCCategoryDecl *OC = dyn_cast<ObjCCategoryDecl>(CDecl)) { 1061 for (ObjCCategoryDecl::protocol_iterator P = OC->protocol_begin(), 1062 PE = OC->protocol_end(); P != PE; ++P) { 1063 ObjCProtocolDecl *Proto = (*P); 1064 Protocols.insert(Proto); 1065 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1066 PE = Proto->protocol_end(); P != PE; ++P) 1067 CollectInheritedProtocols(*P, Protocols); 1068 } 1069 } else if (const ObjCProtocolDecl *OP = dyn_cast<ObjCProtocolDecl>(CDecl)) { 1070 for (ObjCProtocolDecl::protocol_iterator P = OP->protocol_begin(), 1071 PE = OP->protocol_end(); P != PE; ++P) { 1072 ObjCProtocolDecl *Proto = (*P); 1073 Protocols.insert(Proto); 1074 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1075 PE = Proto->protocol_end(); P != PE; ++P) 1076 CollectInheritedProtocols(*P, Protocols); 1077 } 1078 } 1079} 1080 1081unsigned ASTContext::CountNonClassIvars(const ObjCInterfaceDecl *OI) const { 1082 unsigned count = 0; 1083 // Count ivars declared in class extension. 1084 for (const ObjCCategoryDecl *CDecl = OI->getFirstClassExtension(); CDecl; 1085 CDecl = CDecl->getNextClassExtension()) 1086 count += CDecl->ivar_size(); 1087 1088 // Count ivar defined in this class's implementation. This 1089 // includes synthesized ivars. 1090 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) 1091 count += ImplDecl->ivar_size(); 1092 1093 return count; 1094} 1095 1096/// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 1097ObjCImplementationDecl *ASTContext::getObjCImplementation(ObjCInterfaceDecl *D) { 1098 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 1099 I = ObjCImpls.find(D); 1100 if (I != ObjCImpls.end()) 1101 return cast<ObjCImplementationDecl>(I->second); 1102 return 0; 1103} 1104/// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 1105ObjCCategoryImplDecl *ASTContext::getObjCImplementation(ObjCCategoryDecl *D) { 1106 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 1107 I = ObjCImpls.find(D); 1108 if (I != ObjCImpls.end()) 1109 return cast<ObjCCategoryImplDecl>(I->second); 1110 return 0; 1111} 1112 1113/// \brief Set the implementation of ObjCInterfaceDecl. 1114void ASTContext::setObjCImplementation(ObjCInterfaceDecl *IFaceD, 1115 ObjCImplementationDecl *ImplD) { 1116 assert(IFaceD && ImplD && "Passed null params"); 1117 ObjCImpls[IFaceD] = ImplD; 1118} 1119/// \brief Set the implementation of ObjCCategoryDecl. 1120void ASTContext::setObjCImplementation(ObjCCategoryDecl *CatD, 1121 ObjCCategoryImplDecl *ImplD) { 1122 assert(CatD && ImplD && "Passed null params"); 1123 ObjCImpls[CatD] = ImplD; 1124} 1125 1126/// \brief Get the copy initialization expression of VarDecl,or NULL if 1127/// none exists. 1128Expr *ASTContext::getBlockVarCopyInits(const VarDecl*VD) { 1129 assert(VD && "Passed null params"); 1130 assert(VD->hasAttr<BlocksAttr>() && 1131 "getBlockVarCopyInits - not __block var"); 1132 llvm::DenseMap<const VarDecl*, Expr*>::iterator 1133 I = BlockVarCopyInits.find(VD); 1134 return (I != BlockVarCopyInits.end()) ? cast<Expr>(I->second) : 0; 1135} 1136 1137/// \brief Set the copy inialization expression of a block var decl. 1138void ASTContext::setBlockVarCopyInits(VarDecl*VD, Expr* Init) { 1139 assert(VD && Init && "Passed null params"); 1140 assert(VD->hasAttr<BlocksAttr>() && 1141 "setBlockVarCopyInits - not __block var"); 1142 BlockVarCopyInits[VD] = Init; 1143} 1144 1145/// \brief Allocate an uninitialized TypeSourceInfo. 1146/// 1147/// The caller should initialize the memory held by TypeSourceInfo using 1148/// the TypeLoc wrappers. 1149/// 1150/// \param T the type that will be the basis for type source info. This type 1151/// should refer to how the declarator was written in source code, not to 1152/// what type semantic analysis resolved the declarator to. 1153TypeSourceInfo *ASTContext::CreateTypeSourceInfo(QualType T, 1154 unsigned DataSize) const { 1155 if (!DataSize) 1156 DataSize = TypeLoc::getFullDataSizeForType(T); 1157 else 1158 assert(DataSize == TypeLoc::getFullDataSizeForType(T) && 1159 "incorrect data size provided to CreateTypeSourceInfo!"); 1160 1161 TypeSourceInfo *TInfo = 1162 (TypeSourceInfo*)BumpAlloc.Allocate(sizeof(TypeSourceInfo) + DataSize, 8); 1163 new (TInfo) TypeSourceInfo(T); 1164 return TInfo; 1165} 1166 1167TypeSourceInfo *ASTContext::getTrivialTypeSourceInfo(QualType T, 1168 SourceLocation L) const { 1169 TypeSourceInfo *DI = CreateTypeSourceInfo(T); 1170 DI->getTypeLoc().initialize(const_cast<ASTContext &>(*this), L); 1171 return DI; 1172} 1173 1174const ASTRecordLayout & 1175ASTContext::getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) const { 1176 return getObjCLayout(D, 0); 1177} 1178 1179const ASTRecordLayout & 1180ASTContext::getASTObjCImplementationLayout( 1181 const ObjCImplementationDecl *D) const { 1182 return getObjCLayout(D->getClassInterface(), D); 1183} 1184 1185//===----------------------------------------------------------------------===// 1186// Type creation/memoization methods 1187//===----------------------------------------------------------------------===// 1188 1189QualType 1190ASTContext::getExtQualType(const Type *baseType, Qualifiers quals) const { 1191 unsigned fastQuals = quals.getFastQualifiers(); 1192 quals.removeFastQualifiers(); 1193 1194 // Check if we've already instantiated this type. 1195 llvm::FoldingSetNodeID ID; 1196 ExtQuals::Profile(ID, baseType, quals); 1197 void *insertPos = 0; 1198 if (ExtQuals *eq = ExtQualNodes.FindNodeOrInsertPos(ID, insertPos)) { 1199 assert(eq->getQualifiers() == quals); 1200 return QualType(eq, fastQuals); 1201 } 1202 1203 // If the base type is not canonical, make the appropriate canonical type. 1204 QualType canon; 1205 if (!baseType->isCanonicalUnqualified()) { 1206 SplitQualType canonSplit = baseType->getCanonicalTypeInternal().split(); 1207 canonSplit.second.addConsistentQualifiers(quals); 1208 canon = getExtQualType(canonSplit.first, canonSplit.second); 1209 1210 // Re-find the insert position. 1211 (void) ExtQualNodes.FindNodeOrInsertPos(ID, insertPos); 1212 } 1213 1214 ExtQuals *eq = new (*this, TypeAlignment) ExtQuals(baseType, canon, quals); 1215 ExtQualNodes.InsertNode(eq, insertPos); 1216 return QualType(eq, fastQuals); 1217} 1218 1219QualType 1220ASTContext::getAddrSpaceQualType(QualType T, unsigned AddressSpace) const { 1221 QualType CanT = getCanonicalType(T); 1222 if (CanT.getAddressSpace() == AddressSpace) 1223 return T; 1224 1225 // If we are composing extended qualifiers together, merge together 1226 // into one ExtQuals node. 1227 QualifierCollector Quals; 1228 const Type *TypeNode = Quals.strip(T); 1229 1230 // If this type already has an address space specified, it cannot get 1231 // another one. 1232 assert(!Quals.hasAddressSpace() && 1233 "Type cannot be in multiple addr spaces!"); 1234 Quals.addAddressSpace(AddressSpace); 1235 1236 return getExtQualType(TypeNode, Quals); 1237} 1238 1239QualType ASTContext::getObjCGCQualType(QualType T, 1240 Qualifiers::GC GCAttr) const { 1241 QualType CanT = getCanonicalType(T); 1242 if (CanT.getObjCGCAttr() == GCAttr) 1243 return T; 1244 1245 if (const PointerType *ptr = T->getAs<PointerType>()) { 1246 QualType Pointee = ptr->getPointeeType(); 1247 if (Pointee->isAnyPointerType()) { 1248 QualType ResultType = getObjCGCQualType(Pointee, GCAttr); 1249 return getPointerType(ResultType); 1250 } 1251 } 1252 1253 // If we are composing extended qualifiers together, merge together 1254 // into one ExtQuals node. 1255 QualifierCollector Quals; 1256 const Type *TypeNode = Quals.strip(T); 1257 1258 // If this type already has an ObjCGC specified, it cannot get 1259 // another one. 1260 assert(!Quals.hasObjCGCAttr() && 1261 "Type cannot have multiple ObjCGCs!"); 1262 Quals.addObjCGCAttr(GCAttr); 1263 1264 return getExtQualType(TypeNode, Quals); 1265} 1266 1267const FunctionType *ASTContext::adjustFunctionType(const FunctionType *T, 1268 FunctionType::ExtInfo Info) { 1269 if (T->getExtInfo() == Info) 1270 return T; 1271 1272 QualType Result; 1273 if (const FunctionNoProtoType *FNPT = dyn_cast<FunctionNoProtoType>(T)) { 1274 Result = getFunctionNoProtoType(FNPT->getResultType(), Info); 1275 } else { 1276 const FunctionProtoType *FPT = cast<FunctionProtoType>(T); 1277 FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); 1278 EPI.ExtInfo = Info; 1279 Result = getFunctionType(FPT->getResultType(), FPT->arg_type_begin(), 1280 FPT->getNumArgs(), EPI); 1281 } 1282 1283 return cast<FunctionType>(Result.getTypePtr()); 1284} 1285 1286/// getComplexType - Return the uniqued reference to the type for a complex 1287/// number with the specified element type. 1288QualType ASTContext::getComplexType(QualType T) const { 1289 // Unique pointers, to guarantee there is only one pointer of a particular 1290 // structure. 1291 llvm::FoldingSetNodeID ID; 1292 ComplexType::Profile(ID, T); 1293 1294 void *InsertPos = 0; 1295 if (ComplexType *CT = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos)) 1296 return QualType(CT, 0); 1297 1298 // If the pointee type isn't canonical, this won't be a canonical type either, 1299 // so fill in the canonical type field. 1300 QualType Canonical; 1301 if (!T.isCanonical()) { 1302 Canonical = getComplexType(getCanonicalType(T)); 1303 1304 // Get the new insert position for the node we care about. 1305 ComplexType *NewIP = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos); 1306 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1307 } 1308 ComplexType *New = new (*this, TypeAlignment) ComplexType(T, Canonical); 1309 Types.push_back(New); 1310 ComplexTypes.InsertNode(New, InsertPos); 1311 return QualType(New, 0); 1312} 1313 1314/// getPointerType - Return the uniqued reference to the type for a pointer to 1315/// the specified type. 1316QualType ASTContext::getPointerType(QualType T) const { 1317 // Unique pointers, to guarantee there is only one pointer of a particular 1318 // structure. 1319 llvm::FoldingSetNodeID ID; 1320 PointerType::Profile(ID, T); 1321 1322 void *InsertPos = 0; 1323 if (PointerType *PT = PointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1324 return QualType(PT, 0); 1325 1326 // If the pointee type isn't canonical, this won't be a canonical type either, 1327 // so fill in the canonical type field. 1328 QualType Canonical; 1329 if (!T.isCanonical()) { 1330 Canonical = getPointerType(getCanonicalType(T)); 1331 1332 // Get the new insert position for the node we care about. 1333 PointerType *NewIP = PointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1334 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1335 } 1336 PointerType *New = new (*this, TypeAlignment) PointerType(T, Canonical); 1337 Types.push_back(New); 1338 PointerTypes.InsertNode(New, InsertPos); 1339 return QualType(New, 0); 1340} 1341 1342/// getBlockPointerType - Return the uniqued reference to the type for 1343/// a pointer to the specified block. 1344QualType ASTContext::getBlockPointerType(QualType T) const { 1345 assert(T->isFunctionType() && "block of function types only"); 1346 // Unique pointers, to guarantee there is only one block of a particular 1347 // structure. 1348 llvm::FoldingSetNodeID ID; 1349 BlockPointerType::Profile(ID, T); 1350 1351 void *InsertPos = 0; 1352 if (BlockPointerType *PT = 1353 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1354 return QualType(PT, 0); 1355 1356 // If the block pointee type isn't canonical, this won't be a canonical 1357 // type either so fill in the canonical type field. 1358 QualType Canonical; 1359 if (!T.isCanonical()) { 1360 Canonical = getBlockPointerType(getCanonicalType(T)); 1361 1362 // Get the new insert position for the node we care about. 1363 BlockPointerType *NewIP = 1364 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1365 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1366 } 1367 BlockPointerType *New 1368 = new (*this, TypeAlignment) BlockPointerType(T, Canonical); 1369 Types.push_back(New); 1370 BlockPointerTypes.InsertNode(New, InsertPos); 1371 return QualType(New, 0); 1372} 1373 1374/// getLValueReferenceType - Return the uniqued reference to the type for an 1375/// lvalue reference to the specified type. 1376QualType 1377ASTContext::getLValueReferenceType(QualType T, bool SpelledAsLValue) const { 1378 // Unique pointers, to guarantee there is only one pointer of a particular 1379 // structure. 1380 llvm::FoldingSetNodeID ID; 1381 ReferenceType::Profile(ID, T, SpelledAsLValue); 1382 1383 void *InsertPos = 0; 1384 if (LValueReferenceType *RT = 1385 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1386 return QualType(RT, 0); 1387 1388 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1389 1390 // If the referencee type isn't canonical, this won't be a canonical type 1391 // either, so fill in the canonical type field. 1392 QualType Canonical; 1393 if (!SpelledAsLValue || InnerRef || !T.isCanonical()) { 1394 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1395 Canonical = getLValueReferenceType(getCanonicalType(PointeeType)); 1396 1397 // Get the new insert position for the node we care about. 1398 LValueReferenceType *NewIP = 1399 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1400 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1401 } 1402 1403 LValueReferenceType *New 1404 = new (*this, TypeAlignment) LValueReferenceType(T, Canonical, 1405 SpelledAsLValue); 1406 Types.push_back(New); 1407 LValueReferenceTypes.InsertNode(New, InsertPos); 1408 1409 return QualType(New, 0); 1410} 1411 1412/// getRValueReferenceType - Return the uniqued reference to the type for an 1413/// rvalue reference to the specified type. 1414QualType ASTContext::getRValueReferenceType(QualType T) const { 1415 // Unique pointers, to guarantee there is only one pointer of a particular 1416 // structure. 1417 llvm::FoldingSetNodeID ID; 1418 ReferenceType::Profile(ID, T, false); 1419 1420 void *InsertPos = 0; 1421 if (RValueReferenceType *RT = 1422 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1423 return QualType(RT, 0); 1424 1425 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1426 1427 // If the referencee type isn't canonical, this won't be a canonical type 1428 // either, so fill in the canonical type field. 1429 QualType Canonical; 1430 if (InnerRef || !T.isCanonical()) { 1431 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1432 Canonical = getRValueReferenceType(getCanonicalType(PointeeType)); 1433 1434 // Get the new insert position for the node we care about. 1435 RValueReferenceType *NewIP = 1436 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1437 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1438 } 1439 1440 RValueReferenceType *New 1441 = new (*this, TypeAlignment) RValueReferenceType(T, Canonical); 1442 Types.push_back(New); 1443 RValueReferenceTypes.InsertNode(New, InsertPos); 1444 return QualType(New, 0); 1445} 1446 1447/// getMemberPointerType - Return the uniqued reference to the type for a 1448/// member pointer to the specified type, in the specified class. 1449QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls) const { 1450 // Unique pointers, to guarantee there is only one pointer of a particular 1451 // structure. 1452 llvm::FoldingSetNodeID ID; 1453 MemberPointerType::Profile(ID, T, Cls); 1454 1455 void *InsertPos = 0; 1456 if (MemberPointerType *PT = 1457 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1458 return QualType(PT, 0); 1459 1460 // If the pointee or class type isn't canonical, this won't be a canonical 1461 // type either, so fill in the canonical type field. 1462 QualType Canonical; 1463 if (!T.isCanonical() || !Cls->isCanonicalUnqualified()) { 1464 Canonical = getMemberPointerType(getCanonicalType(T),getCanonicalType(Cls)); 1465 1466 // Get the new insert position for the node we care about. 1467 MemberPointerType *NewIP = 1468 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1469 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1470 } 1471 MemberPointerType *New 1472 = new (*this, TypeAlignment) MemberPointerType(T, Cls, Canonical); 1473 Types.push_back(New); 1474 MemberPointerTypes.InsertNode(New, InsertPos); 1475 return QualType(New, 0); 1476} 1477 1478/// getConstantArrayType - Return the unique reference to the type for an 1479/// array of the specified element type. 1480QualType ASTContext::getConstantArrayType(QualType EltTy, 1481 const llvm::APInt &ArySizeIn, 1482 ArrayType::ArraySizeModifier ASM, 1483 unsigned IndexTypeQuals) const { 1484 assert((EltTy->isDependentType() || 1485 EltTy->isIncompleteType() || EltTy->isConstantSizeType()) && 1486 "Constant array of VLAs is illegal!"); 1487 1488 // Convert the array size into a canonical width matching the pointer size for 1489 // the target. 1490 llvm::APInt ArySize(ArySizeIn); 1491 ArySize = 1492 ArySize.zextOrTrunc(Target.getPointerWidth(getTargetAddressSpace(EltTy))); 1493 1494 llvm::FoldingSetNodeID ID; 1495 ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, IndexTypeQuals); 1496 1497 void *InsertPos = 0; 1498 if (ConstantArrayType *ATP = 1499 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1500 return QualType(ATP, 0); 1501 1502 // If the element type isn't canonical or has qualifiers, this won't 1503 // be a canonical type either, so fill in the canonical type field. 1504 QualType Canon; 1505 if (!EltTy.isCanonical() || EltTy.hasLocalQualifiers()) { 1506 SplitQualType canonSplit = getCanonicalType(EltTy).split(); 1507 Canon = getConstantArrayType(QualType(canonSplit.first, 0), ArySize, 1508 ASM, IndexTypeQuals); 1509 Canon = getQualifiedType(Canon, canonSplit.second); 1510 1511 // Get the new insert position for the node we care about. 1512 ConstantArrayType *NewIP = 1513 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1514 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1515 } 1516 1517 ConstantArrayType *New = new(*this,TypeAlignment) 1518 ConstantArrayType(EltTy, Canon, ArySize, ASM, IndexTypeQuals); 1519 ConstantArrayTypes.InsertNode(New, InsertPos); 1520 Types.push_back(New); 1521 return QualType(New, 0); 1522} 1523 1524/// getVariableArrayDecayedType - Turns the given type, which may be 1525/// variably-modified, into the corresponding type with all the known 1526/// sizes replaced with [*]. 1527QualType ASTContext::getVariableArrayDecayedType(QualType type) const { 1528 // Vastly most common case. 1529 if (!type->isVariablyModifiedType()) return type; 1530 1531 QualType result; 1532 1533 SplitQualType split = type.getSplitDesugaredType(); 1534 const Type *ty = split.first; 1535 switch (ty->getTypeClass()) { 1536#define TYPE(Class, Base) 1537#define ABSTRACT_TYPE(Class, Base) 1538#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 1539#include "clang/AST/TypeNodes.def" 1540 llvm_unreachable("didn't desugar past all non-canonical types?"); 1541 1542 // These types should never be variably-modified. 1543 case Type::Builtin: 1544 case Type::Complex: 1545 case Type::Vector: 1546 case Type::ExtVector: 1547 case Type::DependentSizedExtVector: 1548 case Type::ObjCObject: 1549 case Type::ObjCInterface: 1550 case Type::ObjCObjectPointer: 1551 case Type::Record: 1552 case Type::Enum: 1553 case Type::UnresolvedUsing: 1554 case Type::TypeOfExpr: 1555 case Type::TypeOf: 1556 case Type::Decltype: 1557 case Type::DependentName: 1558 case Type::InjectedClassName: 1559 case Type::TemplateSpecialization: 1560 case Type::DependentTemplateSpecialization: 1561 case Type::TemplateTypeParm: 1562 case Type::SubstTemplateTypeParmPack: 1563 case Type::Auto: 1564 case Type::PackExpansion: 1565 llvm_unreachable("type should never be variably-modified"); 1566 1567 // These types can be variably-modified but should never need to 1568 // further decay. 1569 case Type::FunctionNoProto: 1570 case Type::FunctionProto: 1571 case Type::BlockPointer: 1572 case Type::MemberPointer: 1573 return type; 1574 1575 // These types can be variably-modified. All these modifications 1576 // preserve structure except as noted by comments. 1577 // TODO: if we ever care about optimizing VLAs, there are no-op 1578 // optimizations available here. 1579 case Type::Pointer: 1580 result = getPointerType(getVariableArrayDecayedType( 1581 cast<PointerType>(ty)->getPointeeType())); 1582 break; 1583 1584 case Type::LValueReference: { 1585 const LValueReferenceType *lv = cast<LValueReferenceType>(ty); 1586 result = getLValueReferenceType( 1587 getVariableArrayDecayedType(lv->getPointeeType()), 1588 lv->isSpelledAsLValue()); 1589 break; 1590 } 1591 1592 case Type::RValueReference: { 1593 const RValueReferenceType *lv = cast<RValueReferenceType>(ty); 1594 result = getRValueReferenceType( 1595 getVariableArrayDecayedType(lv->getPointeeType())); 1596 break; 1597 } 1598 1599 case Type::ConstantArray: { 1600 const ConstantArrayType *cat = cast<ConstantArrayType>(ty); 1601 result = getConstantArrayType( 1602 getVariableArrayDecayedType(cat->getElementType()), 1603 cat->getSize(), 1604 cat->getSizeModifier(), 1605 cat->getIndexTypeCVRQualifiers()); 1606 break; 1607 } 1608 1609 case Type::DependentSizedArray: { 1610 const DependentSizedArrayType *dat = cast<DependentSizedArrayType>(ty); 1611 result = getDependentSizedArrayType( 1612 getVariableArrayDecayedType(dat->getElementType()), 1613 dat->getSizeExpr(), 1614 dat->getSizeModifier(), 1615 dat->getIndexTypeCVRQualifiers(), 1616 dat->getBracketsRange()); 1617 break; 1618 } 1619 1620 // Turn incomplete types into [*] types. 1621 case Type::IncompleteArray: { 1622 const IncompleteArrayType *iat = cast<IncompleteArrayType>(ty); 1623 result = getVariableArrayType( 1624 getVariableArrayDecayedType(iat->getElementType()), 1625 /*size*/ 0, 1626 ArrayType::Normal, 1627 iat->getIndexTypeCVRQualifiers(), 1628 SourceRange()); 1629 break; 1630 } 1631 1632 // Turn VLA types into [*] types. 1633 case Type::VariableArray: { 1634 const VariableArrayType *vat = cast<VariableArrayType>(ty); 1635 result = getVariableArrayType( 1636 getVariableArrayDecayedType(vat->getElementType()), 1637 /*size*/ 0, 1638 ArrayType::Star, 1639 vat->getIndexTypeCVRQualifiers(), 1640 vat->getBracketsRange()); 1641 break; 1642 } 1643 } 1644 1645 // Apply the top-level qualifiers from the original. 1646 return getQualifiedType(result, split.second); 1647} 1648 1649/// getVariableArrayType - Returns a non-unique reference to the type for a 1650/// variable array of the specified element type. 1651QualType ASTContext::getVariableArrayType(QualType EltTy, 1652 Expr *NumElts, 1653 ArrayType::ArraySizeModifier ASM, 1654 unsigned IndexTypeQuals, 1655 SourceRange Brackets) const { 1656 // Since we don't unique expressions, it isn't possible to unique VLA's 1657 // that have an expression provided for their size. 1658 QualType Canon; 1659 1660 // Be sure to pull qualifiers off the element type. 1661 if (!EltTy.isCanonical() || EltTy.hasLocalQualifiers()) { 1662 SplitQualType canonSplit = getCanonicalType(EltTy).split(); 1663 Canon = getVariableArrayType(QualType(canonSplit.first, 0), NumElts, ASM, 1664 IndexTypeQuals, Brackets); 1665 Canon = getQualifiedType(Canon, canonSplit.second); 1666 } 1667 1668 VariableArrayType *New = new(*this, TypeAlignment) 1669 VariableArrayType(EltTy, Canon, NumElts, ASM, IndexTypeQuals, Brackets); 1670 1671 VariableArrayTypes.push_back(New); 1672 Types.push_back(New); 1673 return QualType(New, 0); 1674} 1675 1676/// getDependentSizedArrayType - Returns a non-unique reference to 1677/// the type for a dependently-sized array of the specified element 1678/// type. 1679QualType ASTContext::getDependentSizedArrayType(QualType elementType, 1680 Expr *numElements, 1681 ArrayType::ArraySizeModifier ASM, 1682 unsigned elementTypeQuals, 1683 SourceRange brackets) const { 1684 assert((!numElements || numElements->isTypeDependent() || 1685 numElements->isValueDependent()) && 1686 "Size must be type- or value-dependent!"); 1687 1688 // Dependently-sized array types that do not have a specified number 1689 // of elements will have their sizes deduced from a dependent 1690 // initializer. We do no canonicalization here at all, which is okay 1691 // because they can't be used in most locations. 1692 if (!numElements) { 1693 DependentSizedArrayType *newType 1694 = new (*this, TypeAlignment) 1695 DependentSizedArrayType(*this, elementType, QualType(), 1696 numElements, ASM, elementTypeQuals, 1697 brackets); 1698 Types.push_back(newType); 1699 return QualType(newType, 0); 1700 } 1701 1702 // Otherwise, we actually build a new type every time, but we 1703 // also build a canonical type. 1704 1705 SplitQualType canonElementType = getCanonicalType(elementType).split(); 1706 1707 void *insertPos = 0; 1708 llvm::FoldingSetNodeID ID; 1709 DependentSizedArrayType::Profile(ID, *this, 1710 QualType(canonElementType.first, 0), 1711 ASM, elementTypeQuals, numElements); 1712 1713 // Look for an existing type with these properties. 1714 DependentSizedArrayType *canonTy = 1715 DependentSizedArrayTypes.FindNodeOrInsertPos(ID, insertPos); 1716 1717 // If we don't have one, build one. 1718 if (!canonTy) { 1719 canonTy = new (*this, TypeAlignment) 1720 DependentSizedArrayType(*this, QualType(canonElementType.first, 0), 1721 QualType(), numElements, ASM, elementTypeQuals, 1722 brackets); 1723 DependentSizedArrayTypes.InsertNode(canonTy, insertPos); 1724 Types.push_back(canonTy); 1725 } 1726 1727 // Apply qualifiers from the element type to the array. 1728 QualType canon = getQualifiedType(QualType(canonTy,0), 1729 canonElementType.second); 1730 1731 // If we didn't need extra canonicalization for the element type, 1732 // then just use that as our result. 1733 if (QualType(canonElementType.first, 0) == elementType) 1734 return canon; 1735 1736 // Otherwise, we need to build a type which follows the spelling 1737 // of the element type. 1738 DependentSizedArrayType *sugaredType 1739 = new (*this, TypeAlignment) 1740 DependentSizedArrayType(*this, elementType, canon, numElements, 1741 ASM, elementTypeQuals, brackets); 1742 Types.push_back(sugaredType); 1743 return QualType(sugaredType, 0); 1744} 1745 1746QualType ASTContext::getIncompleteArrayType(QualType elementType, 1747 ArrayType::ArraySizeModifier ASM, 1748 unsigned elementTypeQuals) const { 1749 llvm::FoldingSetNodeID ID; 1750 IncompleteArrayType::Profile(ID, elementType, ASM, elementTypeQuals); 1751 1752 void *insertPos = 0; 1753 if (IncompleteArrayType *iat = 1754 IncompleteArrayTypes.FindNodeOrInsertPos(ID, insertPos)) 1755 return QualType(iat, 0); 1756 1757 // If the element type isn't canonical, this won't be a canonical type 1758 // either, so fill in the canonical type field. We also have to pull 1759 // qualifiers off the element type. 1760 QualType canon; 1761 1762 if (!elementType.isCanonical() || elementType.hasLocalQualifiers()) { 1763 SplitQualType canonSplit = getCanonicalType(elementType).split(); 1764 canon = getIncompleteArrayType(QualType(canonSplit.first, 0), 1765 ASM, elementTypeQuals); 1766 canon = getQualifiedType(canon, canonSplit.second); 1767 1768 // Get the new insert position for the node we care about. 1769 IncompleteArrayType *existing = 1770 IncompleteArrayTypes.FindNodeOrInsertPos(ID, insertPos); 1771 assert(!existing && "Shouldn't be in the map!"); (void) existing; 1772 } 1773 1774 IncompleteArrayType *newType = new (*this, TypeAlignment) 1775 IncompleteArrayType(elementType, canon, ASM, elementTypeQuals); 1776 1777 IncompleteArrayTypes.InsertNode(newType, insertPos); 1778 Types.push_back(newType); 1779 return QualType(newType, 0); 1780} 1781 1782/// getVectorType - Return the unique reference to a vector type of 1783/// the specified element type and size. VectorType must be a built-in type. 1784QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts, 1785 VectorType::VectorKind VecKind) const { 1786 assert(vecType->isBuiltinType()); 1787 1788 // Check if we've already instantiated a vector of this type. 1789 llvm::FoldingSetNodeID ID; 1790 VectorType::Profile(ID, vecType, NumElts, Type::Vector, VecKind); 1791 1792 void *InsertPos = 0; 1793 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1794 return QualType(VTP, 0); 1795 1796 // If the element type isn't canonical, this won't be a canonical type either, 1797 // so fill in the canonical type field. 1798 QualType Canonical; 1799 if (!vecType.isCanonical()) { 1800 Canonical = getVectorType(getCanonicalType(vecType), NumElts, VecKind); 1801 1802 // Get the new insert position for the node we care about. 1803 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1804 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1805 } 1806 VectorType *New = new (*this, TypeAlignment) 1807 VectorType(vecType, NumElts, Canonical, VecKind); 1808 VectorTypes.InsertNode(New, InsertPos); 1809 Types.push_back(New); 1810 return QualType(New, 0); 1811} 1812 1813/// getExtVectorType - Return the unique reference to an extended vector type of 1814/// the specified element type and size. VectorType must be a built-in type. 1815QualType 1816ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) const { 1817 assert(vecType->isBuiltinType()); 1818 1819 // Check if we've already instantiated a vector of this type. 1820 llvm::FoldingSetNodeID ID; 1821 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector, 1822 VectorType::GenericVector); 1823 void *InsertPos = 0; 1824 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1825 return QualType(VTP, 0); 1826 1827 // If the element type isn't canonical, this won't be a canonical type either, 1828 // so fill in the canonical type field. 1829 QualType Canonical; 1830 if (!vecType.isCanonical()) { 1831 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts); 1832 1833 // Get the new insert position for the node we care about. 1834 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1835 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1836 } 1837 ExtVectorType *New = new (*this, TypeAlignment) 1838 ExtVectorType(vecType, NumElts, Canonical); 1839 VectorTypes.InsertNode(New, InsertPos); 1840 Types.push_back(New); 1841 return QualType(New, 0); 1842} 1843 1844QualType 1845ASTContext::getDependentSizedExtVectorType(QualType vecType, 1846 Expr *SizeExpr, 1847 SourceLocation AttrLoc) const { 1848 llvm::FoldingSetNodeID ID; 1849 DependentSizedExtVectorType::Profile(ID, *this, getCanonicalType(vecType), 1850 SizeExpr); 1851 1852 void *InsertPos = 0; 1853 DependentSizedExtVectorType *Canon 1854 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1855 DependentSizedExtVectorType *New; 1856 if (Canon) { 1857 // We already have a canonical version of this array type; use it as 1858 // the canonical type for a newly-built type. 1859 New = new (*this, TypeAlignment) 1860 DependentSizedExtVectorType(*this, vecType, QualType(Canon, 0), 1861 SizeExpr, AttrLoc); 1862 } else { 1863 QualType CanonVecTy = getCanonicalType(vecType); 1864 if (CanonVecTy == vecType) { 1865 New = new (*this, TypeAlignment) 1866 DependentSizedExtVectorType(*this, vecType, QualType(), SizeExpr, 1867 AttrLoc); 1868 1869 DependentSizedExtVectorType *CanonCheck 1870 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1871 assert(!CanonCheck && "Dependent-sized ext_vector canonical type broken"); 1872 (void)CanonCheck; 1873 DependentSizedExtVectorTypes.InsertNode(New, InsertPos); 1874 } else { 1875 QualType Canon = getDependentSizedExtVectorType(CanonVecTy, SizeExpr, 1876 SourceLocation()); 1877 New = new (*this, TypeAlignment) 1878 DependentSizedExtVectorType(*this, vecType, Canon, SizeExpr, AttrLoc); 1879 } 1880 } 1881 1882 Types.push_back(New); 1883 return QualType(New, 0); 1884} 1885 1886/// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 1887/// 1888QualType 1889ASTContext::getFunctionNoProtoType(QualType ResultTy, 1890 const FunctionType::ExtInfo &Info) const { 1891 const CallingConv DefaultCC = Info.getCC(); 1892 const CallingConv CallConv = (LangOpts.MRTD && DefaultCC == CC_Default) ? 1893 CC_X86StdCall : DefaultCC; 1894 // Unique functions, to guarantee there is only one function of a particular 1895 // structure. 1896 llvm::FoldingSetNodeID ID; 1897 FunctionNoProtoType::Profile(ID, ResultTy, Info); 1898 1899 void *InsertPos = 0; 1900 if (FunctionNoProtoType *FT = 1901 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1902 return QualType(FT, 0); 1903 1904 QualType Canonical; 1905 if (!ResultTy.isCanonical() || 1906 getCanonicalCallConv(CallConv) != CallConv) { 1907 Canonical = 1908 getFunctionNoProtoType(getCanonicalType(ResultTy), 1909 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1910 1911 // Get the new insert position for the node we care about. 1912 FunctionNoProtoType *NewIP = 1913 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1914 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1915 } 1916 1917 FunctionProtoType::ExtInfo newInfo = Info.withCallingConv(CallConv); 1918 FunctionNoProtoType *New = new (*this, TypeAlignment) 1919 FunctionNoProtoType(ResultTy, Canonical, newInfo); 1920 Types.push_back(New); 1921 FunctionNoProtoTypes.InsertNode(New, InsertPos); 1922 return QualType(New, 0); 1923} 1924 1925/// getFunctionType - Return a normal function type with a typed argument 1926/// list. isVariadic indicates whether the argument list includes '...'. 1927QualType 1928ASTContext::getFunctionType(QualType ResultTy, 1929 const QualType *ArgArray, unsigned NumArgs, 1930 const FunctionProtoType::ExtProtoInfo &EPI) const { 1931 // Unique functions, to guarantee there is only one function of a particular 1932 // structure. 1933 llvm::FoldingSetNodeID ID; 1934 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, EPI, *this); 1935 1936 void *InsertPos = 0; 1937 if (FunctionProtoType *FTP = 1938 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1939 return QualType(FTP, 0); 1940 1941 // Determine whether the type being created is already canonical or not. 1942 bool isCanonical= EPI.ExceptionSpecType == EST_None && ResultTy.isCanonical(); 1943 for (unsigned i = 0; i != NumArgs && isCanonical; ++i) 1944 if (!ArgArray[i].isCanonicalAsParam()) 1945 isCanonical = false; 1946 1947 const CallingConv DefaultCC = EPI.ExtInfo.getCC(); 1948 const CallingConv CallConv = (LangOpts.MRTD && DefaultCC == CC_Default) ? 1949 CC_X86StdCall : DefaultCC; 1950 1951 // If this type isn't canonical, get the canonical version of it. 1952 // The exception spec is not part of the canonical type. 1953 QualType Canonical; 1954 if (!isCanonical || getCanonicalCallConv(CallConv) != CallConv) { 1955 llvm::SmallVector<QualType, 16> CanonicalArgs; 1956 CanonicalArgs.reserve(NumArgs); 1957 for (unsigned i = 0; i != NumArgs; ++i) 1958 CanonicalArgs.push_back(getCanonicalParamType(ArgArray[i])); 1959 1960 FunctionProtoType::ExtProtoInfo CanonicalEPI = EPI; 1961 CanonicalEPI.ExceptionSpecType = EST_None; 1962 CanonicalEPI.NumExceptions = 0; 1963 CanonicalEPI.ExtInfo 1964 = CanonicalEPI.ExtInfo.withCallingConv(getCanonicalCallConv(CallConv)); 1965 1966 Canonical = getFunctionType(getCanonicalType(ResultTy), 1967 CanonicalArgs.data(), NumArgs, 1968 CanonicalEPI); 1969 1970 // Get the new insert position for the node we care about. 1971 FunctionProtoType *NewIP = 1972 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1973 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1974 } 1975 1976 // FunctionProtoType objects are allocated with extra bytes after them 1977 // for two variable size arrays (for parameter and exception types) at the 1978 // end of them. Instead of the exception types, there could be a noexcept 1979 // expression and a context pointer. 1980 size_t Size = sizeof(FunctionProtoType) + 1981 NumArgs * sizeof(QualType); 1982 if (EPI.ExceptionSpecType == EST_Dynamic) 1983 Size += EPI.NumExceptions * sizeof(QualType); 1984 else if (EPI.ExceptionSpecType == EST_ComputedNoexcept) { 1985 Size += sizeof(Expr*); 1986 } 1987 FunctionProtoType *FTP = (FunctionProtoType*) Allocate(Size, TypeAlignment); 1988 FunctionProtoType::ExtProtoInfo newEPI = EPI; 1989 newEPI.ExtInfo = EPI.ExtInfo.withCallingConv(CallConv); 1990 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, Canonical, newEPI); 1991 Types.push_back(FTP); 1992 FunctionProtoTypes.InsertNode(FTP, InsertPos); 1993 return QualType(FTP, 0); 1994} 1995 1996#ifndef NDEBUG 1997static bool NeedsInjectedClassNameType(const RecordDecl *D) { 1998 if (!isa<CXXRecordDecl>(D)) return false; 1999 const CXXRecordDecl *RD = cast<CXXRecordDecl>(D); 2000 if (isa<ClassTemplatePartialSpecializationDecl>(RD)) 2001 return true; 2002 if (RD->getDescribedClassTemplate() && 2003 !isa<ClassTemplateSpecializationDecl>(RD)) 2004 return true; 2005 return false; 2006} 2007#endif 2008 2009/// getInjectedClassNameType - Return the unique reference to the 2010/// injected class name type for the specified templated declaration. 2011QualType ASTContext::getInjectedClassNameType(CXXRecordDecl *Decl, 2012 QualType TST) const { 2013 assert(NeedsInjectedClassNameType(Decl)); 2014 if (Decl->TypeForDecl) { 2015 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 2016 } else if (CXXRecordDecl *PrevDecl = Decl->getPreviousDeclaration()) { 2017 assert(PrevDecl->TypeForDecl && "previous declaration has no type"); 2018 Decl->TypeForDecl = PrevDecl->TypeForDecl; 2019 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 2020 } else { 2021 Type *newType = 2022 new (*this, TypeAlignment) InjectedClassNameType(Decl, TST); 2023 Decl->TypeForDecl = newType; 2024 Types.push_back(newType); 2025 } 2026 return QualType(Decl->TypeForDecl, 0); 2027} 2028 2029/// getTypeDeclType - Return the unique reference to the type for the 2030/// specified type declaration. 2031QualType ASTContext::getTypeDeclTypeSlow(const TypeDecl *Decl) const { 2032 assert(Decl && "Passed null for Decl param"); 2033 assert(!Decl->TypeForDecl && "TypeForDecl present in slow case"); 2034 2035 if (const TypedefDecl *Typedef = dyn_cast<TypedefDecl>(Decl)) 2036 return getTypedefType(Typedef); 2037 2038 assert(!isa<TemplateTypeParmDecl>(Decl) && 2039 "Template type parameter types are always available."); 2040 2041 if (const RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) { 2042 assert(!Record->getPreviousDeclaration() && 2043 "struct/union has previous declaration"); 2044 assert(!NeedsInjectedClassNameType(Record)); 2045 return getRecordType(Record); 2046 } else if (const EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) { 2047 assert(!Enum->getPreviousDeclaration() && 2048 "enum has previous declaration"); 2049 return getEnumType(Enum); 2050 } else if (const UnresolvedUsingTypenameDecl *Using = 2051 dyn_cast<UnresolvedUsingTypenameDecl>(Decl)) { 2052 Type *newType = new (*this, TypeAlignment) UnresolvedUsingType(Using); 2053 Decl->TypeForDecl = newType; 2054 Types.push_back(newType); 2055 } else 2056 llvm_unreachable("TypeDecl without a type?"); 2057 2058 return QualType(Decl->TypeForDecl, 0); 2059} 2060 2061/// getTypedefType - Return the unique reference to the type for the 2062/// specified typename decl. 2063QualType 2064ASTContext::getTypedefType(const TypedefDecl *Decl, QualType Canonical) const { 2065 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2066 2067 if (Canonical.isNull()) 2068 Canonical = getCanonicalType(Decl->getUnderlyingType()); 2069 TypedefType *newType = new(*this, TypeAlignment) 2070 TypedefType(Type::Typedef, Decl, Canonical); 2071 Decl->TypeForDecl = newType; 2072 Types.push_back(newType); 2073 return QualType(newType, 0); 2074} 2075 2076QualType ASTContext::getRecordType(const RecordDecl *Decl) const { 2077 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2078 2079 if (const RecordDecl *PrevDecl = Decl->getPreviousDeclaration()) 2080 if (PrevDecl->TypeForDecl) 2081 return QualType(Decl->TypeForDecl = PrevDecl->TypeForDecl, 0); 2082 2083 RecordType *newType = new (*this, TypeAlignment) RecordType(Decl); 2084 Decl->TypeForDecl = newType; 2085 Types.push_back(newType); 2086 return QualType(newType, 0); 2087} 2088 2089QualType ASTContext::getEnumType(const EnumDecl *Decl) const { 2090 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2091 2092 if (const EnumDecl *PrevDecl = Decl->getPreviousDeclaration()) 2093 if (PrevDecl->TypeForDecl) 2094 return QualType(Decl->TypeForDecl = PrevDecl->TypeForDecl, 0); 2095 2096 EnumType *newType = new (*this, TypeAlignment) EnumType(Decl); 2097 Decl->TypeForDecl = newType; 2098 Types.push_back(newType); 2099 return QualType(newType, 0); 2100} 2101 2102QualType ASTContext::getAttributedType(AttributedType::Kind attrKind, 2103 QualType modifiedType, 2104 QualType equivalentType) { 2105 llvm::FoldingSetNodeID id; 2106 AttributedType::Profile(id, attrKind, modifiedType, equivalentType); 2107 2108 void *insertPos = 0; 2109 AttributedType *type = AttributedTypes.FindNodeOrInsertPos(id, insertPos); 2110 if (type) return QualType(type, 0); 2111 2112 QualType canon = getCanonicalType(equivalentType); 2113 type = new (*this, TypeAlignment) 2114 AttributedType(canon, attrKind, modifiedType, equivalentType); 2115 2116 Types.push_back(type); 2117 AttributedTypes.InsertNode(type, insertPos); 2118 2119 return QualType(type, 0); 2120} 2121 2122 2123/// \brief Retrieve a substitution-result type. 2124QualType 2125ASTContext::getSubstTemplateTypeParmType(const TemplateTypeParmType *Parm, 2126 QualType Replacement) const { 2127 assert(Replacement.isCanonical() 2128 && "replacement types must always be canonical"); 2129 2130 llvm::FoldingSetNodeID ID; 2131 SubstTemplateTypeParmType::Profile(ID, Parm, Replacement); 2132 void *InsertPos = 0; 2133 SubstTemplateTypeParmType *SubstParm 2134 = SubstTemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2135 2136 if (!SubstParm) { 2137 SubstParm = new (*this, TypeAlignment) 2138 SubstTemplateTypeParmType(Parm, Replacement); 2139 Types.push_back(SubstParm); 2140 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 2141 } 2142 2143 return QualType(SubstParm, 0); 2144} 2145 2146/// \brief Retrieve a 2147QualType ASTContext::getSubstTemplateTypeParmPackType( 2148 const TemplateTypeParmType *Parm, 2149 const TemplateArgument &ArgPack) { 2150#ifndef NDEBUG 2151 for (TemplateArgument::pack_iterator P = ArgPack.pack_begin(), 2152 PEnd = ArgPack.pack_end(); 2153 P != PEnd; ++P) { 2154 assert(P->getKind() == TemplateArgument::Type &&"Pack contains a non-type"); 2155 assert(P->getAsType().isCanonical() && "Pack contains non-canonical type"); 2156 } 2157#endif 2158 2159 llvm::FoldingSetNodeID ID; 2160 SubstTemplateTypeParmPackType::Profile(ID, Parm, ArgPack); 2161 void *InsertPos = 0; 2162 if (SubstTemplateTypeParmPackType *SubstParm 2163 = SubstTemplateTypeParmPackTypes.FindNodeOrInsertPos(ID, InsertPos)) 2164 return QualType(SubstParm, 0); 2165 2166 QualType Canon; 2167 if (!Parm->isCanonicalUnqualified()) { 2168 Canon = getCanonicalType(QualType(Parm, 0)); 2169 Canon = getSubstTemplateTypeParmPackType(cast<TemplateTypeParmType>(Canon), 2170 ArgPack); 2171 SubstTemplateTypeParmPackTypes.FindNodeOrInsertPos(ID, InsertPos); 2172 } 2173 2174 SubstTemplateTypeParmPackType *SubstParm 2175 = new (*this, TypeAlignment) SubstTemplateTypeParmPackType(Parm, Canon, 2176 ArgPack); 2177 Types.push_back(SubstParm); 2178 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 2179 return QualType(SubstParm, 0); 2180} 2181 2182/// \brief Retrieve the template type parameter type for a template 2183/// parameter or parameter pack with the given depth, index, and (optionally) 2184/// name. 2185QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index, 2186 bool ParameterPack, 2187 IdentifierInfo *Name) const { 2188 llvm::FoldingSetNodeID ID; 2189 TemplateTypeParmType::Profile(ID, Depth, Index, ParameterPack, Name); 2190 void *InsertPos = 0; 2191 TemplateTypeParmType *TypeParm 2192 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2193 2194 if (TypeParm) 2195 return QualType(TypeParm, 0); 2196 2197 if (Name) { 2198 QualType Canon = getTemplateTypeParmType(Depth, Index, ParameterPack); 2199 TypeParm = new (*this, TypeAlignment) 2200 TemplateTypeParmType(Depth, Index, ParameterPack, Name, Canon); 2201 2202 TemplateTypeParmType *TypeCheck 2203 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2204 assert(!TypeCheck && "Template type parameter canonical type broken"); 2205 (void)TypeCheck; 2206 } else 2207 TypeParm = new (*this, TypeAlignment) 2208 TemplateTypeParmType(Depth, Index, ParameterPack); 2209 2210 Types.push_back(TypeParm); 2211 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos); 2212 2213 return QualType(TypeParm, 0); 2214} 2215 2216TypeSourceInfo * 2217ASTContext::getTemplateSpecializationTypeInfo(TemplateName Name, 2218 SourceLocation NameLoc, 2219 const TemplateArgumentListInfo &Args, 2220 QualType CanonType) const { 2221 assert(!Name.getAsDependentTemplateName() && 2222 "No dependent template names here!"); 2223 QualType TST = getTemplateSpecializationType(Name, Args, CanonType); 2224 2225 TypeSourceInfo *DI = CreateTypeSourceInfo(TST); 2226 TemplateSpecializationTypeLoc TL 2227 = cast<TemplateSpecializationTypeLoc>(DI->getTypeLoc()); 2228 TL.setTemplateNameLoc(NameLoc); 2229 TL.setLAngleLoc(Args.getLAngleLoc()); 2230 TL.setRAngleLoc(Args.getRAngleLoc()); 2231 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 2232 TL.setArgLocInfo(i, Args[i].getLocInfo()); 2233 return DI; 2234} 2235 2236QualType 2237ASTContext::getTemplateSpecializationType(TemplateName Template, 2238 const TemplateArgumentListInfo &Args, 2239 QualType Canon) const { 2240 assert(!Template.getAsDependentTemplateName() && 2241 "No dependent template names here!"); 2242 2243 unsigned NumArgs = Args.size(); 2244 2245 llvm::SmallVector<TemplateArgument, 4> ArgVec; 2246 ArgVec.reserve(NumArgs); 2247 for (unsigned i = 0; i != NumArgs; ++i) 2248 ArgVec.push_back(Args[i].getArgument()); 2249 2250 return getTemplateSpecializationType(Template, ArgVec.data(), NumArgs, 2251 Canon); 2252} 2253 2254QualType 2255ASTContext::getTemplateSpecializationType(TemplateName Template, 2256 const TemplateArgument *Args, 2257 unsigned NumArgs, 2258 QualType Canon) const { 2259 assert(!Template.getAsDependentTemplateName() && 2260 "No dependent template names here!"); 2261 // Look through qualified template names. 2262 if (QualifiedTemplateName *QTN = Template.getAsQualifiedTemplateName()) 2263 Template = TemplateName(QTN->getTemplateDecl()); 2264 2265 if (!Canon.isNull()) 2266 Canon = getCanonicalType(Canon); 2267 else 2268 Canon = getCanonicalTemplateSpecializationType(Template, Args, NumArgs); 2269 2270 // Allocate the (non-canonical) template specialization type, but don't 2271 // try to unique it: these types typically have location information that 2272 // we don't unique and don't want to lose. 2273 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 2274 sizeof(TemplateArgument) * NumArgs), 2275 TypeAlignment); 2276 TemplateSpecializationType *Spec 2277 = new (Mem) TemplateSpecializationType(Template, 2278 Args, NumArgs, 2279 Canon); 2280 2281 Types.push_back(Spec); 2282 return QualType(Spec, 0); 2283} 2284 2285QualType 2286ASTContext::getCanonicalTemplateSpecializationType(TemplateName Template, 2287 const TemplateArgument *Args, 2288 unsigned NumArgs) const { 2289 assert(!Template.getAsDependentTemplateName() && 2290 "No dependent template names here!"); 2291 // Look through qualified template names. 2292 if (QualifiedTemplateName *QTN = Template.getAsQualifiedTemplateName()) 2293 Template = TemplateName(QTN->getTemplateDecl()); 2294 2295 // Build the canonical template specialization type. 2296 TemplateName CanonTemplate = getCanonicalTemplateName(Template); 2297 llvm::SmallVector<TemplateArgument, 4> CanonArgs; 2298 CanonArgs.reserve(NumArgs); 2299 for (unsigned I = 0; I != NumArgs; ++I) 2300 CanonArgs.push_back(getCanonicalTemplateArgument(Args[I])); 2301 2302 // Determine whether this canonical template specialization type already 2303 // exists. 2304 llvm::FoldingSetNodeID ID; 2305 TemplateSpecializationType::Profile(ID, CanonTemplate, 2306 CanonArgs.data(), NumArgs, *this); 2307 2308 void *InsertPos = 0; 2309 TemplateSpecializationType *Spec 2310 = TemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2311 2312 if (!Spec) { 2313 // Allocate a new canonical template specialization type. 2314 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 2315 sizeof(TemplateArgument) * NumArgs), 2316 TypeAlignment); 2317 Spec = new (Mem) TemplateSpecializationType(CanonTemplate, 2318 CanonArgs.data(), NumArgs, 2319 QualType()); 2320 Types.push_back(Spec); 2321 TemplateSpecializationTypes.InsertNode(Spec, InsertPos); 2322 } 2323 2324 assert(Spec->isDependentType() && 2325 "Non-dependent template-id type must have a canonical type"); 2326 return QualType(Spec, 0); 2327} 2328 2329QualType 2330ASTContext::getElaboratedType(ElaboratedTypeKeyword Keyword, 2331 NestedNameSpecifier *NNS, 2332 QualType NamedType) const { 2333 llvm::FoldingSetNodeID ID; 2334 ElaboratedType::Profile(ID, Keyword, NNS, NamedType); 2335 2336 void *InsertPos = 0; 2337 ElaboratedType *T = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2338 if (T) 2339 return QualType(T, 0); 2340 2341 QualType Canon = NamedType; 2342 if (!Canon.isCanonical()) { 2343 Canon = getCanonicalType(NamedType); 2344 ElaboratedType *CheckT = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2345 assert(!CheckT && "Elaborated canonical type broken"); 2346 (void)CheckT; 2347 } 2348 2349 T = new (*this) ElaboratedType(Keyword, NNS, NamedType, Canon); 2350 Types.push_back(T); 2351 ElaboratedTypes.InsertNode(T, InsertPos); 2352 return QualType(T, 0); 2353} 2354 2355QualType 2356ASTContext::getParenType(QualType InnerType) const { 2357 llvm::FoldingSetNodeID ID; 2358 ParenType::Profile(ID, InnerType); 2359 2360 void *InsertPos = 0; 2361 ParenType *T = ParenTypes.FindNodeOrInsertPos(ID, InsertPos); 2362 if (T) 2363 return QualType(T, 0); 2364 2365 QualType Canon = InnerType; 2366 if (!Canon.isCanonical()) { 2367 Canon = getCanonicalType(InnerType); 2368 ParenType *CheckT = ParenTypes.FindNodeOrInsertPos(ID, InsertPos); 2369 assert(!CheckT && "Paren canonical type broken"); 2370 (void)CheckT; 2371 } 2372 2373 T = new (*this) ParenType(InnerType, Canon); 2374 Types.push_back(T); 2375 ParenTypes.InsertNode(T, InsertPos); 2376 return QualType(T, 0); 2377} 2378 2379QualType ASTContext::getDependentNameType(ElaboratedTypeKeyword Keyword, 2380 NestedNameSpecifier *NNS, 2381 const IdentifierInfo *Name, 2382 QualType Canon) const { 2383 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 2384 2385 if (Canon.isNull()) { 2386 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2387 ElaboratedTypeKeyword CanonKeyword = Keyword; 2388 if (Keyword == ETK_None) 2389 CanonKeyword = ETK_Typename; 2390 2391 if (CanonNNS != NNS || CanonKeyword != Keyword) 2392 Canon = getDependentNameType(CanonKeyword, CanonNNS, Name); 2393 } 2394 2395 llvm::FoldingSetNodeID ID; 2396 DependentNameType::Profile(ID, Keyword, NNS, Name); 2397 2398 void *InsertPos = 0; 2399 DependentNameType *T 2400 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 2401 if (T) 2402 return QualType(T, 0); 2403 2404 T = new (*this) DependentNameType(Keyword, NNS, Name, Canon); 2405 Types.push_back(T); 2406 DependentNameTypes.InsertNode(T, InsertPos); 2407 return QualType(T, 0); 2408} 2409 2410QualType 2411ASTContext::getDependentTemplateSpecializationType( 2412 ElaboratedTypeKeyword Keyword, 2413 NestedNameSpecifier *NNS, 2414 const IdentifierInfo *Name, 2415 const TemplateArgumentListInfo &Args) const { 2416 // TODO: avoid this copy 2417 llvm::SmallVector<TemplateArgument, 16> ArgCopy; 2418 for (unsigned I = 0, E = Args.size(); I != E; ++I) 2419 ArgCopy.push_back(Args[I].getArgument()); 2420 return getDependentTemplateSpecializationType(Keyword, NNS, Name, 2421 ArgCopy.size(), 2422 ArgCopy.data()); 2423} 2424 2425QualType 2426ASTContext::getDependentTemplateSpecializationType( 2427 ElaboratedTypeKeyword Keyword, 2428 NestedNameSpecifier *NNS, 2429 const IdentifierInfo *Name, 2430 unsigned NumArgs, 2431 const TemplateArgument *Args) const { 2432 assert((!NNS || NNS->isDependent()) && 2433 "nested-name-specifier must be dependent"); 2434 2435 llvm::FoldingSetNodeID ID; 2436 DependentTemplateSpecializationType::Profile(ID, *this, Keyword, NNS, 2437 Name, NumArgs, Args); 2438 2439 void *InsertPos = 0; 2440 DependentTemplateSpecializationType *T 2441 = DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2442 if (T) 2443 return QualType(T, 0); 2444 2445 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2446 2447 ElaboratedTypeKeyword CanonKeyword = Keyword; 2448 if (Keyword == ETK_None) CanonKeyword = ETK_Typename; 2449 2450 bool AnyNonCanonArgs = false; 2451 llvm::SmallVector<TemplateArgument, 16> CanonArgs(NumArgs); 2452 for (unsigned I = 0; I != NumArgs; ++I) { 2453 CanonArgs[I] = getCanonicalTemplateArgument(Args[I]); 2454 if (!CanonArgs[I].structurallyEquals(Args[I])) 2455 AnyNonCanonArgs = true; 2456 } 2457 2458 QualType Canon; 2459 if (AnyNonCanonArgs || CanonNNS != NNS || CanonKeyword != Keyword) { 2460 Canon = getDependentTemplateSpecializationType(CanonKeyword, CanonNNS, 2461 Name, NumArgs, 2462 CanonArgs.data()); 2463 2464 // Find the insert position again. 2465 DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2466 } 2467 2468 void *Mem = Allocate((sizeof(DependentTemplateSpecializationType) + 2469 sizeof(TemplateArgument) * NumArgs), 2470 TypeAlignment); 2471 T = new (Mem) DependentTemplateSpecializationType(Keyword, NNS, 2472 Name, NumArgs, Args, Canon); 2473 Types.push_back(T); 2474 DependentTemplateSpecializationTypes.InsertNode(T, InsertPos); 2475 return QualType(T, 0); 2476} 2477 2478QualType ASTContext::getPackExpansionType(QualType Pattern, 2479 llvm::Optional<unsigned> NumExpansions) { 2480 llvm::FoldingSetNodeID ID; 2481 PackExpansionType::Profile(ID, Pattern, NumExpansions); 2482 2483 assert(Pattern->containsUnexpandedParameterPack() && 2484 "Pack expansions must expand one or more parameter packs"); 2485 void *InsertPos = 0; 2486 PackExpansionType *T 2487 = PackExpansionTypes.FindNodeOrInsertPos(ID, InsertPos); 2488 if (T) 2489 return QualType(T, 0); 2490 2491 QualType Canon; 2492 if (!Pattern.isCanonical()) { 2493 Canon = getPackExpansionType(getCanonicalType(Pattern), NumExpansions); 2494 2495 // Find the insert position again. 2496 PackExpansionTypes.FindNodeOrInsertPos(ID, InsertPos); 2497 } 2498 2499 T = new (*this) PackExpansionType(Pattern, Canon, NumExpansions); 2500 Types.push_back(T); 2501 PackExpansionTypes.InsertNode(T, InsertPos); 2502 return QualType(T, 0); 2503} 2504 2505/// CmpProtocolNames - Comparison predicate for sorting protocols 2506/// alphabetically. 2507static bool CmpProtocolNames(const ObjCProtocolDecl *LHS, 2508 const ObjCProtocolDecl *RHS) { 2509 return LHS->getDeclName() < RHS->getDeclName(); 2510} 2511 2512static bool areSortedAndUniqued(ObjCProtocolDecl * const *Protocols, 2513 unsigned NumProtocols) { 2514 if (NumProtocols == 0) return true; 2515 2516 for (unsigned i = 1; i != NumProtocols; ++i) 2517 if (!CmpProtocolNames(Protocols[i-1], Protocols[i])) 2518 return false; 2519 return true; 2520} 2521 2522static void SortAndUniqueProtocols(ObjCProtocolDecl **Protocols, 2523 unsigned &NumProtocols) { 2524 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols; 2525 2526 // Sort protocols, keyed by name. 2527 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames); 2528 2529 // Remove duplicates. 2530 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd); 2531 NumProtocols = ProtocolsEnd-Protocols; 2532} 2533 2534QualType ASTContext::getObjCObjectType(QualType BaseType, 2535 ObjCProtocolDecl * const *Protocols, 2536 unsigned NumProtocols) const { 2537 // If the base type is an interface and there aren't any protocols 2538 // to add, then the interface type will do just fine. 2539 if (!NumProtocols && isa<ObjCInterfaceType>(BaseType)) 2540 return BaseType; 2541 2542 // Look in the folding set for an existing type. 2543 llvm::FoldingSetNodeID ID; 2544 ObjCObjectTypeImpl::Profile(ID, BaseType, Protocols, NumProtocols); 2545 void *InsertPos = 0; 2546 if (ObjCObjectType *QT = ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos)) 2547 return QualType(QT, 0); 2548 2549 // Build the canonical type, which has the canonical base type and 2550 // a sorted-and-uniqued list of protocols. 2551 QualType Canonical; 2552 bool ProtocolsSorted = areSortedAndUniqued(Protocols, NumProtocols); 2553 if (!ProtocolsSorted || !BaseType.isCanonical()) { 2554 if (!ProtocolsSorted) { 2555 llvm::SmallVector<ObjCProtocolDecl*, 8> Sorted(Protocols, 2556 Protocols + NumProtocols); 2557 unsigned UniqueCount = NumProtocols; 2558 2559 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2560 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2561 &Sorted[0], UniqueCount); 2562 } else { 2563 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2564 Protocols, NumProtocols); 2565 } 2566 2567 // Regenerate InsertPos. 2568 ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos); 2569 } 2570 2571 unsigned Size = sizeof(ObjCObjectTypeImpl); 2572 Size += NumProtocols * sizeof(ObjCProtocolDecl *); 2573 void *Mem = Allocate(Size, TypeAlignment); 2574 ObjCObjectTypeImpl *T = 2575 new (Mem) ObjCObjectTypeImpl(Canonical, BaseType, Protocols, NumProtocols); 2576 2577 Types.push_back(T); 2578 ObjCObjectTypes.InsertNode(T, InsertPos); 2579 return QualType(T, 0); 2580} 2581 2582/// getObjCObjectPointerType - Return a ObjCObjectPointerType type for 2583/// the given object type. 2584QualType ASTContext::getObjCObjectPointerType(QualType ObjectT) const { 2585 llvm::FoldingSetNodeID ID; 2586 ObjCObjectPointerType::Profile(ID, ObjectT); 2587 2588 void *InsertPos = 0; 2589 if (ObjCObjectPointerType *QT = 2590 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 2591 return QualType(QT, 0); 2592 2593 // Find the canonical object type. 2594 QualType Canonical; 2595 if (!ObjectT.isCanonical()) { 2596 Canonical = getObjCObjectPointerType(getCanonicalType(ObjectT)); 2597 2598 // Regenerate InsertPos. 2599 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 2600 } 2601 2602 // No match. 2603 void *Mem = Allocate(sizeof(ObjCObjectPointerType), TypeAlignment); 2604 ObjCObjectPointerType *QType = 2605 new (Mem) ObjCObjectPointerType(Canonical, ObjectT); 2606 2607 Types.push_back(QType); 2608 ObjCObjectPointerTypes.InsertNode(QType, InsertPos); 2609 return QualType(QType, 0); 2610} 2611 2612/// getObjCInterfaceType - Return the unique reference to the type for the 2613/// specified ObjC interface decl. The list of protocols is optional. 2614QualType ASTContext::getObjCInterfaceType(const ObjCInterfaceDecl *Decl) const { 2615 if (Decl->TypeForDecl) 2616 return QualType(Decl->TypeForDecl, 0); 2617 2618 // FIXME: redeclarations? 2619 void *Mem = Allocate(sizeof(ObjCInterfaceType), TypeAlignment); 2620 ObjCInterfaceType *T = new (Mem) ObjCInterfaceType(Decl); 2621 Decl->TypeForDecl = T; 2622 Types.push_back(T); 2623 return QualType(T, 0); 2624} 2625 2626/// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique 2627/// TypeOfExprType AST's (since expression's are never shared). For example, 2628/// multiple declarations that refer to "typeof(x)" all contain different 2629/// DeclRefExpr's. This doesn't effect the type checker, since it operates 2630/// on canonical type's (which are always unique). 2631QualType ASTContext::getTypeOfExprType(Expr *tofExpr) const { 2632 TypeOfExprType *toe; 2633 if (tofExpr->isTypeDependent()) { 2634 llvm::FoldingSetNodeID ID; 2635 DependentTypeOfExprType::Profile(ID, *this, tofExpr); 2636 2637 void *InsertPos = 0; 2638 DependentTypeOfExprType *Canon 2639 = DependentTypeOfExprTypes.FindNodeOrInsertPos(ID, InsertPos); 2640 if (Canon) { 2641 // We already have a "canonical" version of an identical, dependent 2642 // typeof(expr) type. Use that as our canonical type. 2643 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, 2644 QualType((TypeOfExprType*)Canon, 0)); 2645 } 2646 else { 2647 // Build a new, canonical typeof(expr) type. 2648 Canon 2649 = new (*this, TypeAlignment) DependentTypeOfExprType(*this, tofExpr); 2650 DependentTypeOfExprTypes.InsertNode(Canon, InsertPos); 2651 toe = Canon; 2652 } 2653 } else { 2654 QualType Canonical = getCanonicalType(tofExpr->getType()); 2655 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, Canonical); 2656 } 2657 Types.push_back(toe); 2658 return QualType(toe, 0); 2659} 2660 2661/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique 2662/// TypeOfType AST's. The only motivation to unique these nodes would be 2663/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be 2664/// an issue. This doesn't effect the type checker, since it operates 2665/// on canonical type's (which are always unique). 2666QualType ASTContext::getTypeOfType(QualType tofType) const { 2667 QualType Canonical = getCanonicalType(tofType); 2668 TypeOfType *tot = new (*this, TypeAlignment) TypeOfType(tofType, Canonical); 2669 Types.push_back(tot); 2670 return QualType(tot, 0); 2671} 2672 2673/// getDecltypeForExpr - Given an expr, will return the decltype for that 2674/// expression, according to the rules in C++0x [dcl.type.simple]p4 2675static QualType getDecltypeForExpr(const Expr *e, const ASTContext &Context) { 2676 if (e->isTypeDependent()) 2677 return Context.DependentTy; 2678 2679 // If e is an id expression or a class member access, decltype(e) is defined 2680 // as the type of the entity named by e. 2681 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(e)) { 2682 if (const ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl())) 2683 return VD->getType(); 2684 } 2685 if (const MemberExpr *ME = dyn_cast<MemberExpr>(e)) { 2686 if (const FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) 2687 return FD->getType(); 2688 } 2689 // If e is a function call or an invocation of an overloaded operator, 2690 // (parentheses around e are ignored), decltype(e) is defined as the 2691 // return type of that function. 2692 if (const CallExpr *CE = dyn_cast<CallExpr>(e->IgnoreParens())) 2693 return CE->getCallReturnType(); 2694 2695 QualType T = e->getType(); 2696 2697 // Otherwise, where T is the type of e, if e is an lvalue, decltype(e) is 2698 // defined as T&, otherwise decltype(e) is defined as T. 2699 if (e->isLValue()) 2700 T = Context.getLValueReferenceType(T); 2701 2702 return T; 2703} 2704 2705/// getDecltypeType - Unlike many "get<Type>" functions, we don't unique 2706/// DecltypeType AST's. The only motivation to unique these nodes would be 2707/// memory savings. Since decltype(t) is fairly uncommon, space shouldn't be 2708/// an issue. This doesn't effect the type checker, since it operates 2709/// on canonical type's (which are always unique). 2710QualType ASTContext::getDecltypeType(Expr *e) const { 2711 DecltypeType *dt; 2712 if (e->isTypeDependent()) { 2713 llvm::FoldingSetNodeID ID; 2714 DependentDecltypeType::Profile(ID, *this, e); 2715 2716 void *InsertPos = 0; 2717 DependentDecltypeType *Canon 2718 = DependentDecltypeTypes.FindNodeOrInsertPos(ID, InsertPos); 2719 if (Canon) { 2720 // We already have a "canonical" version of an equivalent, dependent 2721 // decltype type. Use that as our canonical type. 2722 dt = new (*this, TypeAlignment) DecltypeType(e, DependentTy, 2723 QualType((DecltypeType*)Canon, 0)); 2724 } 2725 else { 2726 // Build a new, canonical typeof(expr) type. 2727 Canon = new (*this, TypeAlignment) DependentDecltypeType(*this, e); 2728 DependentDecltypeTypes.InsertNode(Canon, InsertPos); 2729 dt = Canon; 2730 } 2731 } else { 2732 QualType T = getDecltypeForExpr(e, *this); 2733 dt = new (*this, TypeAlignment) DecltypeType(e, T, getCanonicalType(T)); 2734 } 2735 Types.push_back(dt); 2736 return QualType(dt, 0); 2737} 2738 2739/// getAutoType - We only unique auto types after they've been deduced. 2740QualType ASTContext::getAutoType(QualType DeducedType) const { 2741 void *InsertPos = 0; 2742 if (!DeducedType.isNull()) { 2743 // Look in the folding set for an existing type. 2744 llvm::FoldingSetNodeID ID; 2745 AutoType::Profile(ID, DeducedType); 2746 if (AutoType *AT = AutoTypes.FindNodeOrInsertPos(ID, InsertPos)) 2747 return QualType(AT, 0); 2748 } 2749 2750 AutoType *AT = new (*this, TypeAlignment) AutoType(DeducedType); 2751 Types.push_back(AT); 2752 if (InsertPos) 2753 AutoTypes.InsertNode(AT, InsertPos); 2754 return QualType(AT, 0); 2755} 2756 2757/// getTagDeclType - Return the unique reference to the type for the 2758/// specified TagDecl (struct/union/class/enum) decl. 2759QualType ASTContext::getTagDeclType(const TagDecl *Decl) const { 2760 assert (Decl); 2761 // FIXME: What is the design on getTagDeclType when it requires casting 2762 // away const? mutable? 2763 return getTypeDeclType(const_cast<TagDecl*>(Decl)); 2764} 2765 2766/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result 2767/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and 2768/// needs to agree with the definition in <stddef.h>. 2769CanQualType ASTContext::getSizeType() const { 2770 return getFromTargetType(Target.getSizeType()); 2771} 2772 2773/// getSignedWCharType - Return the type of "signed wchar_t". 2774/// Used when in C++, as a GCC extension. 2775QualType ASTContext::getSignedWCharType() const { 2776 // FIXME: derive from "Target" ? 2777 return WCharTy; 2778} 2779 2780/// getUnsignedWCharType - Return the type of "unsigned wchar_t". 2781/// Used when in C++, as a GCC extension. 2782QualType ASTContext::getUnsignedWCharType() const { 2783 // FIXME: derive from "Target" ? 2784 return UnsignedIntTy; 2785} 2786 2787/// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 2788/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 2789QualType ASTContext::getPointerDiffType() const { 2790 return getFromTargetType(Target.getPtrDiffType(0)); 2791} 2792 2793//===----------------------------------------------------------------------===// 2794// Type Operators 2795//===----------------------------------------------------------------------===// 2796 2797CanQualType ASTContext::getCanonicalParamType(QualType T) const { 2798 // Push qualifiers into arrays, and then discard any remaining 2799 // qualifiers. 2800 T = getCanonicalType(T); 2801 T = getVariableArrayDecayedType(T); 2802 const Type *Ty = T.getTypePtr(); 2803 QualType Result; 2804 if (isa<ArrayType>(Ty)) { 2805 Result = getArrayDecayedType(QualType(Ty,0)); 2806 } else if (isa<FunctionType>(Ty)) { 2807 Result = getPointerType(QualType(Ty, 0)); 2808 } else { 2809 Result = QualType(Ty, 0); 2810 } 2811 2812 return CanQualType::CreateUnsafe(Result); 2813} 2814 2815 2816QualType ASTContext::getUnqualifiedArrayType(QualType type, 2817 Qualifiers &quals) { 2818 SplitQualType splitType = type.getSplitUnqualifiedType(); 2819 2820 // FIXME: getSplitUnqualifiedType() actually walks all the way to 2821 // the unqualified desugared type and then drops it on the floor. 2822 // We then have to strip that sugar back off with 2823 // getUnqualifiedDesugaredType(), which is silly. 2824 const ArrayType *AT = 2825 dyn_cast<ArrayType>(splitType.first->getUnqualifiedDesugaredType()); 2826 2827 // If we don't have an array, just use the results in splitType. 2828 if (!AT) { 2829 quals = splitType.second; 2830 return QualType(splitType.first, 0); 2831 } 2832 2833 // Otherwise, recurse on the array's element type. 2834 QualType elementType = AT->getElementType(); 2835 QualType unqualElementType = getUnqualifiedArrayType(elementType, quals); 2836 2837 // If that didn't change the element type, AT has no qualifiers, so we 2838 // can just use the results in splitType. 2839 if (elementType == unqualElementType) { 2840 assert(quals.empty()); // from the recursive call 2841 quals = splitType.second; 2842 return QualType(splitType.first, 0); 2843 } 2844 2845 // Otherwise, add in the qualifiers from the outermost type, then 2846 // build the type back up. 2847 quals.addConsistentQualifiers(splitType.second); 2848 2849 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) { 2850 return getConstantArrayType(unqualElementType, CAT->getSize(), 2851 CAT->getSizeModifier(), 0); 2852 } 2853 2854 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) { 2855 return getIncompleteArrayType(unqualElementType, IAT->getSizeModifier(), 0); 2856 } 2857 2858 if (const VariableArrayType *VAT = dyn_cast<VariableArrayType>(AT)) { 2859 return getVariableArrayType(unqualElementType, 2860 VAT->getSizeExpr(), 2861 VAT->getSizeModifier(), 2862 VAT->getIndexTypeCVRQualifiers(), 2863 VAT->getBracketsRange()); 2864 } 2865 2866 const DependentSizedArrayType *DSAT = cast<DependentSizedArrayType>(AT); 2867 return getDependentSizedArrayType(unqualElementType, DSAT->getSizeExpr(), 2868 DSAT->getSizeModifier(), 0, 2869 SourceRange()); 2870} 2871 2872/// UnwrapSimilarPointerTypes - If T1 and T2 are pointer types that 2873/// may be similar (C++ 4.4), replaces T1 and T2 with the type that 2874/// they point to and return true. If T1 and T2 aren't pointer types 2875/// or pointer-to-member types, or if they are not similar at this 2876/// level, returns false and leaves T1 and T2 unchanged. Top-level 2877/// qualifiers on T1 and T2 are ignored. This function will typically 2878/// be called in a loop that successively "unwraps" pointer and 2879/// pointer-to-member types to compare them at each level. 2880bool ASTContext::UnwrapSimilarPointerTypes(QualType &T1, QualType &T2) { 2881 const PointerType *T1PtrType = T1->getAs<PointerType>(), 2882 *T2PtrType = T2->getAs<PointerType>(); 2883 if (T1PtrType && T2PtrType) { 2884 T1 = T1PtrType->getPointeeType(); 2885 T2 = T2PtrType->getPointeeType(); 2886 return true; 2887 } 2888 2889 const MemberPointerType *T1MPType = T1->getAs<MemberPointerType>(), 2890 *T2MPType = T2->getAs<MemberPointerType>(); 2891 if (T1MPType && T2MPType && 2892 hasSameUnqualifiedType(QualType(T1MPType->getClass(), 0), 2893 QualType(T2MPType->getClass(), 0))) { 2894 T1 = T1MPType->getPointeeType(); 2895 T2 = T2MPType->getPointeeType(); 2896 return true; 2897 } 2898 2899 if (getLangOptions().ObjC1) { 2900 const ObjCObjectPointerType *T1OPType = T1->getAs<ObjCObjectPointerType>(), 2901 *T2OPType = T2->getAs<ObjCObjectPointerType>(); 2902 if (T1OPType && T2OPType) { 2903 T1 = T1OPType->getPointeeType(); 2904 T2 = T2OPType->getPointeeType(); 2905 return true; 2906 } 2907 } 2908 2909 // FIXME: Block pointers, too? 2910 2911 return false; 2912} 2913 2914DeclarationNameInfo 2915ASTContext::getNameForTemplate(TemplateName Name, 2916 SourceLocation NameLoc) const { 2917 if (TemplateDecl *TD = Name.getAsTemplateDecl()) 2918 // DNInfo work in progress: CHECKME: what about DNLoc? 2919 return DeclarationNameInfo(TD->getDeclName(), NameLoc); 2920 2921 if (DependentTemplateName *DTN = Name.getAsDependentTemplateName()) { 2922 DeclarationName DName; 2923 if (DTN->isIdentifier()) { 2924 DName = DeclarationNames.getIdentifier(DTN->getIdentifier()); 2925 return DeclarationNameInfo(DName, NameLoc); 2926 } else { 2927 DName = DeclarationNames.getCXXOperatorName(DTN->getOperator()); 2928 // DNInfo work in progress: FIXME: source locations? 2929 DeclarationNameLoc DNLoc; 2930 DNLoc.CXXOperatorName.BeginOpNameLoc = SourceLocation().getRawEncoding(); 2931 DNLoc.CXXOperatorName.EndOpNameLoc = SourceLocation().getRawEncoding(); 2932 return DeclarationNameInfo(DName, NameLoc, DNLoc); 2933 } 2934 } 2935 2936 OverloadedTemplateStorage *Storage = Name.getAsOverloadedTemplate(); 2937 assert(Storage); 2938 // DNInfo work in progress: CHECKME: what about DNLoc? 2939 return DeclarationNameInfo((*Storage->begin())->getDeclName(), NameLoc); 2940} 2941 2942TemplateName ASTContext::getCanonicalTemplateName(TemplateName Name) const { 2943 if (TemplateDecl *Template = Name.getAsTemplateDecl()) { 2944 if (TemplateTemplateParmDecl *TTP 2945 = dyn_cast<TemplateTemplateParmDecl>(Template)) 2946 Template = getCanonicalTemplateTemplateParmDecl(TTP); 2947 2948 // The canonical template name is the canonical template declaration. 2949 return TemplateName(cast<TemplateDecl>(Template->getCanonicalDecl())); 2950 } 2951 2952 if (SubstTemplateTemplateParmPackStorage *SubstPack 2953 = Name.getAsSubstTemplateTemplateParmPack()) { 2954 TemplateTemplateParmDecl *CanonParam 2955 = getCanonicalTemplateTemplateParmDecl(SubstPack->getParameterPack()); 2956 TemplateArgument CanonArgPack 2957 = getCanonicalTemplateArgument(SubstPack->getArgumentPack()); 2958 return getSubstTemplateTemplateParmPack(CanonParam, CanonArgPack); 2959 } 2960 2961 assert(!Name.getAsOverloadedTemplate()); 2962 2963 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 2964 assert(DTN && "Non-dependent template names must refer to template decls."); 2965 return DTN->CanonicalTemplateName; 2966} 2967 2968bool ASTContext::hasSameTemplateName(TemplateName X, TemplateName Y) { 2969 X = getCanonicalTemplateName(X); 2970 Y = getCanonicalTemplateName(Y); 2971 return X.getAsVoidPointer() == Y.getAsVoidPointer(); 2972} 2973 2974TemplateArgument 2975ASTContext::getCanonicalTemplateArgument(const TemplateArgument &Arg) const { 2976 switch (Arg.getKind()) { 2977 case TemplateArgument::Null: 2978 return Arg; 2979 2980 case TemplateArgument::Expression: 2981 return Arg; 2982 2983 case TemplateArgument::Declaration: 2984 return TemplateArgument(Arg.getAsDecl()->getCanonicalDecl()); 2985 2986 case TemplateArgument::Template: 2987 return TemplateArgument(getCanonicalTemplateName(Arg.getAsTemplate())); 2988 2989 case TemplateArgument::TemplateExpansion: 2990 return TemplateArgument(getCanonicalTemplateName( 2991 Arg.getAsTemplateOrTemplatePattern()), 2992 Arg.getNumTemplateExpansions()); 2993 2994 case TemplateArgument::Integral: 2995 return TemplateArgument(*Arg.getAsIntegral(), 2996 getCanonicalType(Arg.getIntegralType())); 2997 2998 case TemplateArgument::Type: 2999 return TemplateArgument(getCanonicalType(Arg.getAsType())); 3000 3001 case TemplateArgument::Pack: { 3002 if (Arg.pack_size() == 0) 3003 return Arg; 3004 3005 TemplateArgument *CanonArgs 3006 = new (*this) TemplateArgument[Arg.pack_size()]; 3007 unsigned Idx = 0; 3008 for (TemplateArgument::pack_iterator A = Arg.pack_begin(), 3009 AEnd = Arg.pack_end(); 3010 A != AEnd; (void)++A, ++Idx) 3011 CanonArgs[Idx] = getCanonicalTemplateArgument(*A); 3012 3013 return TemplateArgument(CanonArgs, Arg.pack_size()); 3014 } 3015 } 3016 3017 // Silence GCC warning 3018 assert(false && "Unhandled template argument kind"); 3019 return TemplateArgument(); 3020} 3021 3022NestedNameSpecifier * 3023ASTContext::getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) const { 3024 if (!NNS) 3025 return 0; 3026 3027 switch (NNS->getKind()) { 3028 case NestedNameSpecifier::Identifier: 3029 // Canonicalize the prefix but keep the identifier the same. 3030 return NestedNameSpecifier::Create(*this, 3031 getCanonicalNestedNameSpecifier(NNS->getPrefix()), 3032 NNS->getAsIdentifier()); 3033 3034 case NestedNameSpecifier::Namespace: 3035 // A namespace is canonical; build a nested-name-specifier with 3036 // this namespace and no prefix. 3037 return NestedNameSpecifier::Create(*this, 0, 3038 NNS->getAsNamespace()->getOriginalNamespace()); 3039 3040 case NestedNameSpecifier::NamespaceAlias: 3041 // A namespace is canonical; build a nested-name-specifier with 3042 // this namespace and no prefix. 3043 return NestedNameSpecifier::Create(*this, 0, 3044 NNS->getAsNamespaceAlias()->getNamespace() 3045 ->getOriginalNamespace()); 3046 3047 case NestedNameSpecifier::TypeSpec: 3048 case NestedNameSpecifier::TypeSpecWithTemplate: { 3049 QualType T = getCanonicalType(QualType(NNS->getAsType(), 0)); 3050 3051 // If we have some kind of dependent-named type (e.g., "typename T::type"), 3052 // break it apart into its prefix and identifier, then reconsititute those 3053 // as the canonical nested-name-specifier. This is required to canonicalize 3054 // a dependent nested-name-specifier involving typedefs of dependent-name 3055 // types, e.g., 3056 // typedef typename T::type T1; 3057 // typedef typename T1::type T2; 3058 if (const DependentNameType *DNT = T->getAs<DependentNameType>()) { 3059 NestedNameSpecifier *Prefix 3060 = getCanonicalNestedNameSpecifier(DNT->getQualifier()); 3061 return NestedNameSpecifier::Create(*this, Prefix, 3062 const_cast<IdentifierInfo *>(DNT->getIdentifier())); 3063 } 3064 3065 // Do the same thing as above, but with dependent-named specializations. 3066 if (const DependentTemplateSpecializationType *DTST 3067 = T->getAs<DependentTemplateSpecializationType>()) { 3068 NestedNameSpecifier *Prefix 3069 = getCanonicalNestedNameSpecifier(DTST->getQualifier()); 3070 3071 T = getDependentTemplateSpecializationType(DTST->getKeyword(), 3072 Prefix, DTST->getIdentifier(), 3073 DTST->getNumArgs(), 3074 DTST->getArgs()); 3075 T = getCanonicalType(T); 3076 } 3077 3078 return NestedNameSpecifier::Create(*this, 0, false, 3079 const_cast<Type*>(T.getTypePtr())); 3080 } 3081 3082 case NestedNameSpecifier::Global: 3083 // The global specifier is canonical and unique. 3084 return NNS; 3085 } 3086 3087 // Required to silence a GCC warning 3088 return 0; 3089} 3090 3091 3092const ArrayType *ASTContext::getAsArrayType(QualType T) const { 3093 // Handle the non-qualified case efficiently. 3094 if (!T.hasLocalQualifiers()) { 3095 // Handle the common positive case fast. 3096 if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 3097 return AT; 3098 } 3099 3100 // Handle the common negative case fast. 3101 if (!isa<ArrayType>(T.getCanonicalType())) 3102 return 0; 3103 3104 // Apply any qualifiers from the array type to the element type. This 3105 // implements C99 6.7.3p8: "If the specification of an array type includes 3106 // any type qualifiers, the element type is so qualified, not the array type." 3107 3108 // If we get here, we either have type qualifiers on the type, or we have 3109 // sugar such as a typedef in the way. If we have type qualifiers on the type 3110 // we must propagate them down into the element type. 3111 3112 SplitQualType split = T.getSplitDesugaredType(); 3113 Qualifiers qs = split.second; 3114 3115 // If we have a simple case, just return now. 3116 const ArrayType *ATy = dyn_cast<ArrayType>(split.first); 3117 if (ATy == 0 || qs.empty()) 3118 return ATy; 3119 3120 // Otherwise, we have an array and we have qualifiers on it. Push the 3121 // qualifiers into the array element type and return a new array type. 3122 QualType NewEltTy = getQualifiedType(ATy->getElementType(), qs); 3123 3124 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy)) 3125 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(), 3126 CAT->getSizeModifier(), 3127 CAT->getIndexTypeCVRQualifiers())); 3128 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy)) 3129 return cast<ArrayType>(getIncompleteArrayType(NewEltTy, 3130 IAT->getSizeModifier(), 3131 IAT->getIndexTypeCVRQualifiers())); 3132 3133 if (const DependentSizedArrayType *DSAT 3134 = dyn_cast<DependentSizedArrayType>(ATy)) 3135 return cast<ArrayType>( 3136 getDependentSizedArrayType(NewEltTy, 3137 DSAT->getSizeExpr(), 3138 DSAT->getSizeModifier(), 3139 DSAT->getIndexTypeCVRQualifiers(), 3140 DSAT->getBracketsRange())); 3141 3142 const VariableArrayType *VAT = cast<VariableArrayType>(ATy); 3143 return cast<ArrayType>(getVariableArrayType(NewEltTy, 3144 VAT->getSizeExpr(), 3145 VAT->getSizeModifier(), 3146 VAT->getIndexTypeCVRQualifiers(), 3147 VAT->getBracketsRange())); 3148} 3149 3150/// getArrayDecayedType - Return the properly qualified result of decaying the 3151/// specified array type to a pointer. This operation is non-trivial when 3152/// handling typedefs etc. The canonical type of "T" must be an array type, 3153/// this returns a pointer to a properly qualified element of the array. 3154/// 3155/// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 3156QualType ASTContext::getArrayDecayedType(QualType Ty) const { 3157 // Get the element type with 'getAsArrayType' so that we don't lose any 3158 // typedefs in the element type of the array. This also handles propagation 3159 // of type qualifiers from the array type into the element type if present 3160 // (C99 6.7.3p8). 3161 const ArrayType *PrettyArrayType = getAsArrayType(Ty); 3162 assert(PrettyArrayType && "Not an array type!"); 3163 3164 QualType PtrTy = getPointerType(PrettyArrayType->getElementType()); 3165 3166 // int x[restrict 4] -> int *restrict 3167 return getQualifiedType(PtrTy, PrettyArrayType->getIndexTypeQualifiers()); 3168} 3169 3170QualType ASTContext::getBaseElementType(const ArrayType *array) const { 3171 return getBaseElementType(array->getElementType()); 3172} 3173 3174QualType ASTContext::getBaseElementType(QualType type) const { 3175 Qualifiers qs; 3176 while (true) { 3177 SplitQualType split = type.getSplitDesugaredType(); 3178 const ArrayType *array = split.first->getAsArrayTypeUnsafe(); 3179 if (!array) break; 3180 3181 type = array->getElementType(); 3182 qs.addConsistentQualifiers(split.second); 3183 } 3184 3185 return getQualifiedType(type, qs); 3186} 3187 3188/// getConstantArrayElementCount - Returns number of constant array elements. 3189uint64_t 3190ASTContext::getConstantArrayElementCount(const ConstantArrayType *CA) const { 3191 uint64_t ElementCount = 1; 3192 do { 3193 ElementCount *= CA->getSize().getZExtValue(); 3194 CA = dyn_cast<ConstantArrayType>(CA->getElementType()); 3195 } while (CA); 3196 return ElementCount; 3197} 3198 3199/// getFloatingRank - Return a relative rank for floating point types. 3200/// This routine will assert if passed a built-in type that isn't a float. 3201static FloatingRank getFloatingRank(QualType T) { 3202 if (const ComplexType *CT = T->getAs<ComplexType>()) 3203 return getFloatingRank(CT->getElementType()); 3204 3205 assert(T->getAs<BuiltinType>() && "getFloatingRank(): not a floating type"); 3206 switch (T->getAs<BuiltinType>()->getKind()) { 3207 default: assert(0 && "getFloatingRank(): not a floating type"); 3208 case BuiltinType::Float: return FloatRank; 3209 case BuiltinType::Double: return DoubleRank; 3210 case BuiltinType::LongDouble: return LongDoubleRank; 3211 } 3212} 3213 3214/// getFloatingTypeOfSizeWithinDomain - Returns a real floating 3215/// point or a complex type (based on typeDomain/typeSize). 3216/// 'typeDomain' is a real floating point or complex type. 3217/// 'typeSize' is a real floating point or complex type. 3218QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size, 3219 QualType Domain) const { 3220 FloatingRank EltRank = getFloatingRank(Size); 3221 if (Domain->isComplexType()) { 3222 switch (EltRank) { 3223 default: assert(0 && "getFloatingRank(): illegal value for rank"); 3224 case FloatRank: return FloatComplexTy; 3225 case DoubleRank: return DoubleComplexTy; 3226 case LongDoubleRank: return LongDoubleComplexTy; 3227 } 3228 } 3229 3230 assert(Domain->isRealFloatingType() && "Unknown domain!"); 3231 switch (EltRank) { 3232 default: assert(0 && "getFloatingRank(): illegal value for rank"); 3233 case FloatRank: return FloatTy; 3234 case DoubleRank: return DoubleTy; 3235 case LongDoubleRank: return LongDoubleTy; 3236 } 3237} 3238 3239/// getFloatingTypeOrder - Compare the rank of the two specified floating 3240/// point types, ignoring the domain of the type (i.e. 'double' == 3241/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 3242/// LHS < RHS, return -1. 3243int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) const { 3244 FloatingRank LHSR = getFloatingRank(LHS); 3245 FloatingRank RHSR = getFloatingRank(RHS); 3246 3247 if (LHSR == RHSR) 3248 return 0; 3249 if (LHSR > RHSR) 3250 return 1; 3251 return -1; 3252} 3253 3254/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This 3255/// routine will assert if passed a built-in type that isn't an integer or enum, 3256/// or if it is not canonicalized. 3257unsigned ASTContext::getIntegerRank(const Type *T) const { 3258 assert(T->isCanonicalUnqualified() && "T should be canonicalized"); 3259 if (const EnumType* ET = dyn_cast<EnumType>(T)) 3260 T = ET->getDecl()->getPromotionType().getTypePtr(); 3261 3262 if (T->isSpecificBuiltinType(BuiltinType::WChar_S) || 3263 T->isSpecificBuiltinType(BuiltinType::WChar_U)) 3264 T = getFromTargetType(Target.getWCharType()).getTypePtr(); 3265 3266 if (T->isSpecificBuiltinType(BuiltinType::Char16)) 3267 T = getFromTargetType(Target.getChar16Type()).getTypePtr(); 3268 3269 if (T->isSpecificBuiltinType(BuiltinType::Char32)) 3270 T = getFromTargetType(Target.getChar32Type()).getTypePtr(); 3271 3272 switch (cast<BuiltinType>(T)->getKind()) { 3273 default: assert(0 && "getIntegerRank(): not a built-in integer"); 3274 case BuiltinType::Bool: 3275 return 1 + (getIntWidth(BoolTy) << 3); 3276 case BuiltinType::Char_S: 3277 case BuiltinType::Char_U: 3278 case BuiltinType::SChar: 3279 case BuiltinType::UChar: 3280 return 2 + (getIntWidth(CharTy) << 3); 3281 case BuiltinType::Short: 3282 case BuiltinType::UShort: 3283 return 3 + (getIntWidth(ShortTy) << 3); 3284 case BuiltinType::Int: 3285 case BuiltinType::UInt: 3286 return 4 + (getIntWidth(IntTy) << 3); 3287 case BuiltinType::Long: 3288 case BuiltinType::ULong: 3289 return 5 + (getIntWidth(LongTy) << 3); 3290 case BuiltinType::LongLong: 3291 case BuiltinType::ULongLong: 3292 return 6 + (getIntWidth(LongLongTy) << 3); 3293 case BuiltinType::Int128: 3294 case BuiltinType::UInt128: 3295 return 7 + (getIntWidth(Int128Ty) << 3); 3296 } 3297} 3298 3299/// \brief Whether this is a promotable bitfield reference according 3300/// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 3301/// 3302/// \returns the type this bit-field will promote to, or NULL if no 3303/// promotion occurs. 3304QualType ASTContext::isPromotableBitField(Expr *E) const { 3305 if (E->isTypeDependent() || E->isValueDependent()) 3306 return QualType(); 3307 3308 FieldDecl *Field = E->getBitField(); 3309 if (!Field) 3310 return QualType(); 3311 3312 QualType FT = Field->getType(); 3313 3314 llvm::APSInt BitWidthAP = Field->getBitWidth()->EvaluateAsInt(*this); 3315 uint64_t BitWidth = BitWidthAP.getZExtValue(); 3316 uint64_t IntSize = getTypeSize(IntTy); 3317 // GCC extension compatibility: if the bit-field size is less than or equal 3318 // to the size of int, it gets promoted no matter what its type is. 3319 // For instance, unsigned long bf : 4 gets promoted to signed int. 3320 if (BitWidth < IntSize) 3321 return IntTy; 3322 3323 if (BitWidth == IntSize) 3324 return FT->isSignedIntegerType() ? IntTy : UnsignedIntTy; 3325 3326 // Types bigger than int are not subject to promotions, and therefore act 3327 // like the base type. 3328 // FIXME: This doesn't quite match what gcc does, but what gcc does here 3329 // is ridiculous. 3330 return QualType(); 3331} 3332 3333/// getPromotedIntegerType - Returns the type that Promotable will 3334/// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 3335/// integer type. 3336QualType ASTContext::getPromotedIntegerType(QualType Promotable) const { 3337 assert(!Promotable.isNull()); 3338 assert(Promotable->isPromotableIntegerType()); 3339 if (const EnumType *ET = Promotable->getAs<EnumType>()) 3340 return ET->getDecl()->getPromotionType(); 3341 if (Promotable->isSignedIntegerType()) 3342 return IntTy; 3343 uint64_t PromotableSize = getTypeSize(Promotable); 3344 uint64_t IntSize = getTypeSize(IntTy); 3345 assert(Promotable->isUnsignedIntegerType() && PromotableSize <= IntSize); 3346 return (PromotableSize != IntSize) ? IntTy : UnsignedIntTy; 3347} 3348 3349/// getIntegerTypeOrder - Returns the highest ranked integer type: 3350/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 3351/// LHS < RHS, return -1. 3352int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) const { 3353 const Type *LHSC = getCanonicalType(LHS).getTypePtr(); 3354 const Type *RHSC = getCanonicalType(RHS).getTypePtr(); 3355 if (LHSC == RHSC) return 0; 3356 3357 bool LHSUnsigned = LHSC->isUnsignedIntegerType(); 3358 bool RHSUnsigned = RHSC->isUnsignedIntegerType(); 3359 3360 unsigned LHSRank = getIntegerRank(LHSC); 3361 unsigned RHSRank = getIntegerRank(RHSC); 3362 3363 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned. 3364 if (LHSRank == RHSRank) return 0; 3365 return LHSRank > RHSRank ? 1 : -1; 3366 } 3367 3368 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa. 3369 if (LHSUnsigned) { 3370 // If the unsigned [LHS] type is larger, return it. 3371 if (LHSRank >= RHSRank) 3372 return 1; 3373 3374 // If the signed type can represent all values of the unsigned type, it 3375 // wins. Because we are dealing with 2's complement and types that are 3376 // powers of two larger than each other, this is always safe. 3377 return -1; 3378 } 3379 3380 // If the unsigned [RHS] type is larger, return it. 3381 if (RHSRank >= LHSRank) 3382 return -1; 3383 3384 // If the signed type can represent all values of the unsigned type, it 3385 // wins. Because we are dealing with 2's complement and types that are 3386 // powers of two larger than each other, this is always safe. 3387 return 1; 3388} 3389 3390static RecordDecl * 3391CreateRecordDecl(const ASTContext &Ctx, RecordDecl::TagKind TK, 3392 DeclContext *DC, IdentifierInfo *Id) { 3393 SourceLocation Loc; 3394 if (Ctx.getLangOptions().CPlusPlus) 3395 return CXXRecordDecl::Create(Ctx, TK, DC, Loc, Loc, Id); 3396 else 3397 return RecordDecl::Create(Ctx, TK, DC, Loc, Loc, Id); 3398} 3399 3400// getCFConstantStringType - Return the type used for constant CFStrings. 3401QualType ASTContext::getCFConstantStringType() const { 3402 if (!CFConstantStringTypeDecl) { 3403 CFConstantStringTypeDecl = 3404 CreateRecordDecl(*this, TTK_Struct, TUDecl, 3405 &Idents.get("NSConstantString")); 3406 CFConstantStringTypeDecl->startDefinition(); 3407 3408 QualType FieldTypes[4]; 3409 3410 // const int *isa; 3411 FieldTypes[0] = getPointerType(IntTy.withConst()); 3412 // int flags; 3413 FieldTypes[1] = IntTy; 3414 // const char *str; 3415 FieldTypes[2] = getPointerType(CharTy.withConst()); 3416 // long length; 3417 FieldTypes[3] = LongTy; 3418 3419 // Create fields 3420 for (unsigned i = 0; i < 4; ++i) { 3421 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl, 3422 SourceLocation(), 3423 SourceLocation(), 0, 3424 FieldTypes[i], /*TInfo=*/0, 3425 /*BitWidth=*/0, 3426 /*Mutable=*/false); 3427 Field->setAccess(AS_public); 3428 CFConstantStringTypeDecl->addDecl(Field); 3429 } 3430 3431 CFConstantStringTypeDecl->completeDefinition(); 3432 } 3433 3434 return getTagDeclType(CFConstantStringTypeDecl); 3435} 3436 3437void ASTContext::setCFConstantStringType(QualType T) { 3438 const RecordType *Rec = T->getAs<RecordType>(); 3439 assert(Rec && "Invalid CFConstantStringType"); 3440 CFConstantStringTypeDecl = Rec->getDecl(); 3441} 3442 3443// getNSConstantStringType - Return the type used for constant NSStrings. 3444QualType ASTContext::getNSConstantStringType() const { 3445 if (!NSConstantStringTypeDecl) { 3446 NSConstantStringTypeDecl = 3447 CreateRecordDecl(*this, TTK_Struct, TUDecl, 3448 &Idents.get("__builtin_NSString")); 3449 NSConstantStringTypeDecl->startDefinition(); 3450 3451 QualType FieldTypes[3]; 3452 3453 // const int *isa; 3454 FieldTypes[0] = getPointerType(IntTy.withConst()); 3455 // const char *str; 3456 FieldTypes[1] = getPointerType(CharTy.withConst()); 3457 // unsigned int length; 3458 FieldTypes[2] = UnsignedIntTy; 3459 3460 // Create fields 3461 for (unsigned i = 0; i < 3; ++i) { 3462 FieldDecl *Field = FieldDecl::Create(*this, NSConstantStringTypeDecl, 3463 SourceLocation(), 3464 SourceLocation(), 0, 3465 FieldTypes[i], /*TInfo=*/0, 3466 /*BitWidth=*/0, 3467 /*Mutable=*/false); 3468 Field->setAccess(AS_public); 3469 NSConstantStringTypeDecl->addDecl(Field); 3470 } 3471 3472 NSConstantStringTypeDecl->completeDefinition(); 3473 } 3474 3475 return getTagDeclType(NSConstantStringTypeDecl); 3476} 3477 3478void ASTContext::setNSConstantStringType(QualType T) { 3479 const RecordType *Rec = T->getAs<RecordType>(); 3480 assert(Rec && "Invalid NSConstantStringType"); 3481 NSConstantStringTypeDecl = Rec->getDecl(); 3482} 3483 3484QualType ASTContext::getObjCFastEnumerationStateType() const { 3485 if (!ObjCFastEnumerationStateTypeDecl) { 3486 ObjCFastEnumerationStateTypeDecl = 3487 CreateRecordDecl(*this, TTK_Struct, TUDecl, 3488 &Idents.get("__objcFastEnumerationState")); 3489 ObjCFastEnumerationStateTypeDecl->startDefinition(); 3490 3491 QualType FieldTypes[] = { 3492 UnsignedLongTy, 3493 getPointerType(ObjCIdTypedefType), 3494 getPointerType(UnsignedLongTy), 3495 getConstantArrayType(UnsignedLongTy, 3496 llvm::APInt(32, 5), ArrayType::Normal, 0) 3497 }; 3498 3499 for (size_t i = 0; i < 4; ++i) { 3500 FieldDecl *Field = FieldDecl::Create(*this, 3501 ObjCFastEnumerationStateTypeDecl, 3502 SourceLocation(), 3503 SourceLocation(), 0, 3504 FieldTypes[i], /*TInfo=*/0, 3505 /*BitWidth=*/0, 3506 /*Mutable=*/false); 3507 Field->setAccess(AS_public); 3508 ObjCFastEnumerationStateTypeDecl->addDecl(Field); 3509 } 3510 3511 ObjCFastEnumerationStateTypeDecl->completeDefinition(); 3512 } 3513 3514 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 3515} 3516 3517QualType ASTContext::getBlockDescriptorType() const { 3518 if (BlockDescriptorType) 3519 return getTagDeclType(BlockDescriptorType); 3520 3521 RecordDecl *T; 3522 // FIXME: Needs the FlagAppleBlock bit. 3523 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, 3524 &Idents.get("__block_descriptor")); 3525 T->startDefinition(); 3526 3527 QualType FieldTypes[] = { 3528 UnsignedLongTy, 3529 UnsignedLongTy, 3530 }; 3531 3532 const char *FieldNames[] = { 3533 "reserved", 3534 "Size" 3535 }; 3536 3537 for (size_t i = 0; i < 2; ++i) { 3538 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3539 SourceLocation(), 3540 &Idents.get(FieldNames[i]), 3541 FieldTypes[i], /*TInfo=*/0, 3542 /*BitWidth=*/0, 3543 /*Mutable=*/false); 3544 Field->setAccess(AS_public); 3545 T->addDecl(Field); 3546 } 3547 3548 T->completeDefinition(); 3549 3550 BlockDescriptorType = T; 3551 3552 return getTagDeclType(BlockDescriptorType); 3553} 3554 3555void ASTContext::setBlockDescriptorType(QualType T) { 3556 const RecordType *Rec = T->getAs<RecordType>(); 3557 assert(Rec && "Invalid BlockDescriptorType"); 3558 BlockDescriptorType = Rec->getDecl(); 3559} 3560 3561QualType ASTContext::getBlockDescriptorExtendedType() const { 3562 if (BlockDescriptorExtendedType) 3563 return getTagDeclType(BlockDescriptorExtendedType); 3564 3565 RecordDecl *T; 3566 // FIXME: Needs the FlagAppleBlock bit. 3567 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, 3568 &Idents.get("__block_descriptor_withcopydispose")); 3569 T->startDefinition(); 3570 3571 QualType FieldTypes[] = { 3572 UnsignedLongTy, 3573 UnsignedLongTy, 3574 getPointerType(VoidPtrTy), 3575 getPointerType(VoidPtrTy) 3576 }; 3577 3578 const char *FieldNames[] = { 3579 "reserved", 3580 "Size", 3581 "CopyFuncPtr", 3582 "DestroyFuncPtr" 3583 }; 3584 3585 for (size_t i = 0; i < 4; ++i) { 3586 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3587 SourceLocation(), 3588 &Idents.get(FieldNames[i]), 3589 FieldTypes[i], /*TInfo=*/0, 3590 /*BitWidth=*/0, 3591 /*Mutable=*/false); 3592 Field->setAccess(AS_public); 3593 T->addDecl(Field); 3594 } 3595 3596 T->completeDefinition(); 3597 3598 BlockDescriptorExtendedType = T; 3599 3600 return getTagDeclType(BlockDescriptorExtendedType); 3601} 3602 3603void ASTContext::setBlockDescriptorExtendedType(QualType T) { 3604 const RecordType *Rec = T->getAs<RecordType>(); 3605 assert(Rec && "Invalid BlockDescriptorType"); 3606 BlockDescriptorExtendedType = Rec->getDecl(); 3607} 3608 3609bool ASTContext::BlockRequiresCopying(QualType Ty) const { 3610 if (Ty->isBlockPointerType()) 3611 return true; 3612 if (isObjCNSObjectType(Ty)) 3613 return true; 3614 if (Ty->isObjCObjectPointerType()) 3615 return true; 3616 if (getLangOptions().CPlusPlus) { 3617 if (const RecordType *RT = Ty->getAs<RecordType>()) { 3618 CXXRecordDecl *RD = cast<CXXRecordDecl>(RT->getDecl()); 3619 return RD->hasConstCopyConstructor(*this); 3620 3621 } 3622 } 3623 return false; 3624} 3625 3626QualType 3627ASTContext::BuildByRefType(llvm::StringRef DeclName, QualType Ty) const { 3628 // type = struct __Block_byref_1_X { 3629 // void *__isa; 3630 // struct __Block_byref_1_X *__forwarding; 3631 // unsigned int __flags; 3632 // unsigned int __size; 3633 // void *__copy_helper; // as needed 3634 // void *__destroy_help // as needed 3635 // int X; 3636 // } * 3637 3638 bool HasCopyAndDispose = BlockRequiresCopying(Ty); 3639 3640 // FIXME: Move up 3641 llvm::SmallString<36> Name; 3642 llvm::raw_svector_ostream(Name) << "__Block_byref_" << 3643 ++UniqueBlockByRefTypeID << '_' << DeclName; 3644 RecordDecl *T; 3645 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, &Idents.get(Name.str())); 3646 T->startDefinition(); 3647 QualType Int32Ty = IntTy; 3648 assert(getIntWidth(IntTy) == 32 && "non-32bit int not supported"); 3649 QualType FieldTypes[] = { 3650 getPointerType(VoidPtrTy), 3651 getPointerType(getTagDeclType(T)), 3652 Int32Ty, 3653 Int32Ty, 3654 getPointerType(VoidPtrTy), 3655 getPointerType(VoidPtrTy), 3656 Ty 3657 }; 3658 3659 llvm::StringRef FieldNames[] = { 3660 "__isa", 3661 "__forwarding", 3662 "__flags", 3663 "__size", 3664 "__copy_helper", 3665 "__destroy_helper", 3666 DeclName, 3667 }; 3668 3669 for (size_t i = 0; i < 7; ++i) { 3670 if (!HasCopyAndDispose && i >=4 && i <= 5) 3671 continue; 3672 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3673 SourceLocation(), 3674 &Idents.get(FieldNames[i]), 3675 FieldTypes[i], /*TInfo=*/0, 3676 /*BitWidth=*/0, /*Mutable=*/false); 3677 Field->setAccess(AS_public); 3678 T->addDecl(Field); 3679 } 3680 3681 T->completeDefinition(); 3682 3683 return getPointerType(getTagDeclType(T)); 3684} 3685 3686void ASTContext::setObjCFastEnumerationStateType(QualType T) { 3687 const RecordType *Rec = T->getAs<RecordType>(); 3688 assert(Rec && "Invalid ObjCFAstEnumerationStateType"); 3689 ObjCFastEnumerationStateTypeDecl = Rec->getDecl(); 3690} 3691 3692// This returns true if a type has been typedefed to BOOL: 3693// typedef <type> BOOL; 3694static bool isTypeTypedefedAsBOOL(QualType T) { 3695 if (const TypedefType *TT = dyn_cast<TypedefType>(T)) 3696 if (IdentifierInfo *II = TT->getDecl()->getIdentifier()) 3697 return II->isStr("BOOL"); 3698 3699 return false; 3700} 3701 3702/// getObjCEncodingTypeSize returns size of type for objective-c encoding 3703/// purpose. 3704CharUnits ASTContext::getObjCEncodingTypeSize(QualType type) const { 3705 CharUnits sz = getTypeSizeInChars(type); 3706 3707 // Make all integer and enum types at least as large as an int 3708 if (sz.isPositive() && type->isIntegralOrEnumerationType()) 3709 sz = std::max(sz, getTypeSizeInChars(IntTy)); 3710 // Treat arrays as pointers, since that's how they're passed in. 3711 else if (type->isArrayType()) 3712 sz = getTypeSizeInChars(VoidPtrTy); 3713 return sz; 3714} 3715 3716static inline 3717std::string charUnitsToString(const CharUnits &CU) { 3718 return llvm::itostr(CU.getQuantity()); 3719} 3720 3721/// getObjCEncodingForBlock - Return the encoded type for this block 3722/// declaration. 3723std::string ASTContext::getObjCEncodingForBlock(const BlockExpr *Expr) const { 3724 std::string S; 3725 3726 const BlockDecl *Decl = Expr->getBlockDecl(); 3727 QualType BlockTy = 3728 Expr->getType()->getAs<BlockPointerType>()->getPointeeType(); 3729 // Encode result type. 3730 getObjCEncodingForType(BlockTy->getAs<FunctionType>()->getResultType(), S); 3731 // Compute size of all parameters. 3732 // Start with computing size of a pointer in number of bytes. 3733 // FIXME: There might(should) be a better way of doing this computation! 3734 SourceLocation Loc; 3735 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3736 CharUnits ParmOffset = PtrSize; 3737 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), 3738 E = Decl->param_end(); PI != E; ++PI) { 3739 QualType PType = (*PI)->getType(); 3740 CharUnits sz = getObjCEncodingTypeSize(PType); 3741 assert (sz.isPositive() && "BlockExpr - Incomplete param type"); 3742 ParmOffset += sz; 3743 } 3744 // Size of the argument frame 3745 S += charUnitsToString(ParmOffset); 3746 // Block pointer and offset. 3747 S += "@?0"; 3748 ParmOffset = PtrSize; 3749 3750 // Argument types. 3751 ParmOffset = PtrSize; 3752 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), E = 3753 Decl->param_end(); PI != E; ++PI) { 3754 ParmVarDecl *PVDecl = *PI; 3755 QualType PType = PVDecl->getOriginalType(); 3756 if (const ArrayType *AT = 3757 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3758 // Use array's original type only if it has known number of 3759 // elements. 3760 if (!isa<ConstantArrayType>(AT)) 3761 PType = PVDecl->getType(); 3762 } else if (PType->isFunctionType()) 3763 PType = PVDecl->getType(); 3764 getObjCEncodingForType(PType, S); 3765 S += charUnitsToString(ParmOffset); 3766 ParmOffset += getObjCEncodingTypeSize(PType); 3767 } 3768 3769 return S; 3770} 3771 3772void ASTContext::getObjCEncodingForFunctionDecl(const FunctionDecl *Decl, 3773 std::string& S) { 3774 // Encode result type. 3775 getObjCEncodingForType(Decl->getResultType(), S); 3776 CharUnits ParmOffset; 3777 // Compute size of all parameters. 3778 for (FunctionDecl::param_const_iterator PI = Decl->param_begin(), 3779 E = Decl->param_end(); PI != E; ++PI) { 3780 QualType PType = (*PI)->getType(); 3781 CharUnits sz = getObjCEncodingTypeSize(PType); 3782 assert (sz.isPositive() && 3783 "getObjCEncodingForMethodDecl - Incomplete param type"); 3784 ParmOffset += sz; 3785 } 3786 S += charUnitsToString(ParmOffset); 3787 ParmOffset = CharUnits::Zero(); 3788 3789 // Argument types. 3790 for (FunctionDecl::param_const_iterator PI = Decl->param_begin(), 3791 E = Decl->param_end(); PI != E; ++PI) { 3792 ParmVarDecl *PVDecl = *PI; 3793 QualType PType = PVDecl->getOriginalType(); 3794 if (const ArrayType *AT = 3795 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3796 // Use array's original type only if it has known number of 3797 // elements. 3798 if (!isa<ConstantArrayType>(AT)) 3799 PType = PVDecl->getType(); 3800 } else if (PType->isFunctionType()) 3801 PType = PVDecl->getType(); 3802 getObjCEncodingForType(PType, S); 3803 S += charUnitsToString(ParmOffset); 3804 ParmOffset += getObjCEncodingTypeSize(PType); 3805 } 3806} 3807 3808/// getObjCEncodingForMethodDecl - Return the encoded type for this method 3809/// declaration. 3810void ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, 3811 std::string& S) const { 3812 // FIXME: This is not very efficient. 3813 // Encode type qualifer, 'in', 'inout', etc. for the return type. 3814 getObjCEncodingForTypeQualifier(Decl->getObjCDeclQualifier(), S); 3815 // Encode result type. 3816 getObjCEncodingForType(Decl->getResultType(), S); 3817 // Compute size of all parameters. 3818 // Start with computing size of a pointer in number of bytes. 3819 // FIXME: There might(should) be a better way of doing this computation! 3820 SourceLocation Loc; 3821 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3822 // The first two arguments (self and _cmd) are pointers; account for 3823 // their size. 3824 CharUnits ParmOffset = 2 * PtrSize; 3825 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3826 E = Decl->sel_param_end(); PI != E; ++PI) { 3827 QualType PType = (*PI)->getType(); 3828 CharUnits sz = getObjCEncodingTypeSize(PType); 3829 assert (sz.isPositive() && 3830 "getObjCEncodingForMethodDecl - Incomplete param type"); 3831 ParmOffset += sz; 3832 } 3833 S += charUnitsToString(ParmOffset); 3834 S += "@0:"; 3835 S += charUnitsToString(PtrSize); 3836 3837 // Argument types. 3838 ParmOffset = 2 * PtrSize; 3839 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3840 E = Decl->sel_param_end(); PI != E; ++PI) { 3841 ParmVarDecl *PVDecl = *PI; 3842 QualType PType = PVDecl->getOriginalType(); 3843 if (const ArrayType *AT = 3844 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3845 // Use array's original type only if it has known number of 3846 // elements. 3847 if (!isa<ConstantArrayType>(AT)) 3848 PType = PVDecl->getType(); 3849 } else if (PType->isFunctionType()) 3850 PType = PVDecl->getType(); 3851 // Process argument qualifiers for user supplied arguments; such as, 3852 // 'in', 'inout', etc. 3853 getObjCEncodingForTypeQualifier(PVDecl->getObjCDeclQualifier(), S); 3854 getObjCEncodingForType(PType, S); 3855 S += charUnitsToString(ParmOffset); 3856 ParmOffset += getObjCEncodingTypeSize(PType); 3857 } 3858} 3859 3860/// getObjCEncodingForPropertyDecl - Return the encoded type for this 3861/// property declaration. If non-NULL, Container must be either an 3862/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be 3863/// NULL when getting encodings for protocol properties. 3864/// Property attributes are stored as a comma-delimited C string. The simple 3865/// attributes readonly and bycopy are encoded as single characters. The 3866/// parametrized attributes, getter=name, setter=name, and ivar=name, are 3867/// encoded as single characters, followed by an identifier. Property types 3868/// are also encoded as a parametrized attribute. The characters used to encode 3869/// these attributes are defined by the following enumeration: 3870/// @code 3871/// enum PropertyAttributes { 3872/// kPropertyReadOnly = 'R', // property is read-only. 3873/// kPropertyBycopy = 'C', // property is a copy of the value last assigned 3874/// kPropertyByref = '&', // property is a reference to the value last assigned 3875/// kPropertyDynamic = 'D', // property is dynamic 3876/// kPropertyGetter = 'G', // followed by getter selector name 3877/// kPropertySetter = 'S', // followed by setter selector name 3878/// kPropertyInstanceVariable = 'V' // followed by instance variable name 3879/// kPropertyType = 't' // followed by old-style type encoding. 3880/// kPropertyWeak = 'W' // 'weak' property 3881/// kPropertyStrong = 'P' // property GC'able 3882/// kPropertyNonAtomic = 'N' // property non-atomic 3883/// }; 3884/// @endcode 3885void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 3886 const Decl *Container, 3887 std::string& S) const { 3888 // Collect information from the property implementation decl(s). 3889 bool Dynamic = false; 3890 ObjCPropertyImplDecl *SynthesizePID = 0; 3891 3892 // FIXME: Duplicated code due to poor abstraction. 3893 if (Container) { 3894 if (const ObjCCategoryImplDecl *CID = 3895 dyn_cast<ObjCCategoryImplDecl>(Container)) { 3896 for (ObjCCategoryImplDecl::propimpl_iterator 3897 i = CID->propimpl_begin(), e = CID->propimpl_end(); 3898 i != e; ++i) { 3899 ObjCPropertyImplDecl *PID = *i; 3900 if (PID->getPropertyDecl() == PD) { 3901 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3902 Dynamic = true; 3903 } else { 3904 SynthesizePID = PID; 3905 } 3906 } 3907 } 3908 } else { 3909 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container); 3910 for (ObjCCategoryImplDecl::propimpl_iterator 3911 i = OID->propimpl_begin(), e = OID->propimpl_end(); 3912 i != e; ++i) { 3913 ObjCPropertyImplDecl *PID = *i; 3914 if (PID->getPropertyDecl() == PD) { 3915 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3916 Dynamic = true; 3917 } else { 3918 SynthesizePID = PID; 3919 } 3920 } 3921 } 3922 } 3923 } 3924 3925 // FIXME: This is not very efficient. 3926 S = "T"; 3927 3928 // Encode result type. 3929 // GCC has some special rules regarding encoding of properties which 3930 // closely resembles encoding of ivars. 3931 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, 0, 3932 true /* outermost type */, 3933 true /* encoding for property */); 3934 3935 if (PD->isReadOnly()) { 3936 S += ",R"; 3937 } else { 3938 switch (PD->getSetterKind()) { 3939 case ObjCPropertyDecl::Assign: break; 3940 case ObjCPropertyDecl::Copy: S += ",C"; break; 3941 case ObjCPropertyDecl::Retain: S += ",&"; break; 3942 } 3943 } 3944 3945 // It really isn't clear at all what this means, since properties 3946 // are "dynamic by default". 3947 if (Dynamic) 3948 S += ",D"; 3949 3950 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) 3951 S += ",N"; 3952 3953 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) { 3954 S += ",G"; 3955 S += PD->getGetterName().getAsString(); 3956 } 3957 3958 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) { 3959 S += ",S"; 3960 S += PD->getSetterName().getAsString(); 3961 } 3962 3963 if (SynthesizePID) { 3964 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl(); 3965 S += ",V"; 3966 S += OID->getNameAsString(); 3967 } 3968 3969 // FIXME: OBJCGC: weak & strong 3970} 3971 3972/// getLegacyIntegralTypeEncoding - 3973/// Another legacy compatibility encoding: 32-bit longs are encoded as 3974/// 'l' or 'L' , but not always. For typedefs, we need to use 3975/// 'i' or 'I' instead if encoding a struct field, or a pointer! 3976/// 3977void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const { 3978 if (isa<TypedefType>(PointeeTy.getTypePtr())) { 3979 if (const BuiltinType *BT = PointeeTy->getAs<BuiltinType>()) { 3980 if (BT->getKind() == BuiltinType::ULong && getIntWidth(PointeeTy) == 32) 3981 PointeeTy = UnsignedIntTy; 3982 else 3983 if (BT->getKind() == BuiltinType::Long && getIntWidth(PointeeTy) == 32) 3984 PointeeTy = IntTy; 3985 } 3986 } 3987} 3988 3989void ASTContext::getObjCEncodingForType(QualType T, std::string& S, 3990 const FieldDecl *Field) const { 3991 // We follow the behavior of gcc, expanding structures which are 3992 // directly pointed to, and expanding embedded structures. Note that 3993 // these rules are sufficient to prevent recursive encoding of the 3994 // same type. 3995 getObjCEncodingForTypeImpl(T, S, true, true, Field, 3996 true /* outermost type */); 3997} 3998 3999static char ObjCEncodingForPrimitiveKind(const ASTContext *C, QualType T) { 4000 switch (T->getAs<BuiltinType>()->getKind()) { 4001 default: assert(0 && "Unhandled builtin type kind"); 4002 case BuiltinType::Void: return 'v'; 4003 case BuiltinType::Bool: return 'B'; 4004 case BuiltinType::Char_U: 4005 case BuiltinType::UChar: return 'C'; 4006 case BuiltinType::UShort: return 'S'; 4007 case BuiltinType::UInt: return 'I'; 4008 case BuiltinType::ULong: 4009 return C->getIntWidth(T) == 32 ? 'L' : 'Q'; 4010 case BuiltinType::UInt128: return 'T'; 4011 case BuiltinType::ULongLong: return 'Q'; 4012 case BuiltinType::Char_S: 4013 case BuiltinType::SChar: return 'c'; 4014 case BuiltinType::Short: return 's'; 4015 case BuiltinType::WChar_S: 4016 case BuiltinType::WChar_U: 4017 case BuiltinType::Int: return 'i'; 4018 case BuiltinType::Long: 4019 return C->getIntWidth(T) == 32 ? 'l' : 'q'; 4020 case BuiltinType::LongLong: return 'q'; 4021 case BuiltinType::Int128: return 't'; 4022 case BuiltinType::Float: return 'f'; 4023 case BuiltinType::Double: return 'd'; 4024 case BuiltinType::LongDouble: return 'D'; 4025 } 4026} 4027 4028static void EncodeBitField(const ASTContext *Ctx, std::string& S, 4029 QualType T, const FieldDecl *FD) { 4030 const Expr *E = FD->getBitWidth(); 4031 assert(E && "bitfield width not there - getObjCEncodingForTypeImpl"); 4032 S += 'b'; 4033 // The NeXT runtime encodes bit fields as b followed by the number of bits. 4034 // The GNU runtime requires more information; bitfields are encoded as b, 4035 // then the offset (in bits) of the first element, then the type of the 4036 // bitfield, then the size in bits. For example, in this structure: 4037 // 4038 // struct 4039 // { 4040 // int integer; 4041 // int flags:2; 4042 // }; 4043 // On a 32-bit system, the encoding for flags would be b2 for the NeXT 4044 // runtime, but b32i2 for the GNU runtime. The reason for this extra 4045 // information is not especially sensible, but we're stuck with it for 4046 // compatibility with GCC, although providing it breaks anything that 4047 // actually uses runtime introspection and wants to work on both runtimes... 4048 if (!Ctx->getLangOptions().NeXTRuntime) { 4049 const RecordDecl *RD = FD->getParent(); 4050 const ASTRecordLayout &RL = Ctx->getASTRecordLayout(RD); 4051 // FIXME: This same linear search is also used in ExprConstant - it might 4052 // be better if the FieldDecl stored its offset. We'd be increasing the 4053 // size of the object slightly, but saving some time every time it is used. 4054 unsigned i = 0; 4055 for (RecordDecl::field_iterator Field = RD->field_begin(), 4056 FieldEnd = RD->field_end(); 4057 Field != FieldEnd; (void)++Field, ++i) { 4058 if (*Field == FD) 4059 break; 4060 } 4061 S += llvm::utostr(RL.getFieldOffset(i)); 4062 if (T->isEnumeralType()) 4063 S += 'i'; 4064 else 4065 S += ObjCEncodingForPrimitiveKind(Ctx, T); 4066 } 4067 unsigned N = E->EvaluateAsInt(*Ctx).getZExtValue(); 4068 S += llvm::utostr(N); 4069} 4070 4071// FIXME: Use SmallString for accumulating string. 4072void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S, 4073 bool ExpandPointedToStructures, 4074 bool ExpandStructures, 4075 const FieldDecl *FD, 4076 bool OutermostType, 4077 bool EncodingProperty) const { 4078 if (T->getAs<BuiltinType>()) { 4079 if (FD && FD->isBitField()) 4080 return EncodeBitField(this, S, T, FD); 4081 S += ObjCEncodingForPrimitiveKind(this, T); 4082 return; 4083 } 4084 4085 if (const ComplexType *CT = T->getAs<ComplexType>()) { 4086 S += 'j'; 4087 getObjCEncodingForTypeImpl(CT->getElementType(), S, false, false, 0, false, 4088 false); 4089 return; 4090 } 4091 4092 // encoding for pointer or r3eference types. 4093 QualType PointeeTy; 4094 if (const PointerType *PT = T->getAs<PointerType>()) { 4095 if (PT->isObjCSelType()) { 4096 S += ':'; 4097 return; 4098 } 4099 PointeeTy = PT->getPointeeType(); 4100 } 4101 else if (const ReferenceType *RT = T->getAs<ReferenceType>()) 4102 PointeeTy = RT->getPointeeType(); 4103 if (!PointeeTy.isNull()) { 4104 bool isReadOnly = false; 4105 // For historical/compatibility reasons, the read-only qualifier of the 4106 // pointee gets emitted _before_ the '^'. The read-only qualifier of 4107 // the pointer itself gets ignored, _unless_ we are looking at a typedef! 4108 // Also, do not emit the 'r' for anything but the outermost type! 4109 if (isa<TypedefType>(T.getTypePtr())) { 4110 if (OutermostType && T.isConstQualified()) { 4111 isReadOnly = true; 4112 S += 'r'; 4113 } 4114 } else if (OutermostType) { 4115 QualType P = PointeeTy; 4116 while (P->getAs<PointerType>()) 4117 P = P->getAs<PointerType>()->getPointeeType(); 4118 if (P.isConstQualified()) { 4119 isReadOnly = true; 4120 S += 'r'; 4121 } 4122 } 4123 if (isReadOnly) { 4124 // Another legacy compatibility encoding. Some ObjC qualifier and type 4125 // combinations need to be rearranged. 4126 // Rewrite "in const" from "nr" to "rn" 4127 if (llvm::StringRef(S).endswith("nr")) 4128 S.replace(S.end()-2, S.end(), "rn"); 4129 } 4130 4131 if (PointeeTy->isCharType()) { 4132 // char pointer types should be encoded as '*' unless it is a 4133 // type that has been typedef'd to 'BOOL'. 4134 if (!isTypeTypedefedAsBOOL(PointeeTy)) { 4135 S += '*'; 4136 return; 4137 } 4138 } else if (const RecordType *RTy = PointeeTy->getAs<RecordType>()) { 4139 // GCC binary compat: Need to convert "struct objc_class *" to "#". 4140 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_class")) { 4141 S += '#'; 4142 return; 4143 } 4144 // GCC binary compat: Need to convert "struct objc_object *" to "@". 4145 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_object")) { 4146 S += '@'; 4147 return; 4148 } 4149 // fall through... 4150 } 4151 S += '^'; 4152 getLegacyIntegralTypeEncoding(PointeeTy); 4153 4154 getObjCEncodingForTypeImpl(PointeeTy, S, false, ExpandPointedToStructures, 4155 NULL); 4156 return; 4157 } 4158 4159 if (const ArrayType *AT = 4160 // Ignore type qualifiers etc. 4161 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) { 4162 if (isa<IncompleteArrayType>(AT)) { 4163 // Incomplete arrays are encoded as a pointer to the array element. 4164 S += '^'; 4165 4166 getObjCEncodingForTypeImpl(AT->getElementType(), S, 4167 false, ExpandStructures, FD); 4168 } else { 4169 S += '['; 4170 4171 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 4172 S += llvm::utostr(CAT->getSize().getZExtValue()); 4173 else { 4174 //Variable length arrays are encoded as a regular array with 0 elements. 4175 assert(isa<VariableArrayType>(AT) && "Unknown array type!"); 4176 S += '0'; 4177 } 4178 4179 getObjCEncodingForTypeImpl(AT->getElementType(), S, 4180 false, ExpandStructures, FD); 4181 S += ']'; 4182 } 4183 return; 4184 } 4185 4186 if (T->getAs<FunctionType>()) { 4187 S += '?'; 4188 return; 4189 } 4190 4191 if (const RecordType *RTy = T->getAs<RecordType>()) { 4192 RecordDecl *RDecl = RTy->getDecl(); 4193 S += RDecl->isUnion() ? '(' : '{'; 4194 // Anonymous structures print as '?' 4195 if (const IdentifierInfo *II = RDecl->getIdentifier()) { 4196 S += II->getName(); 4197 if (ClassTemplateSpecializationDecl *Spec 4198 = dyn_cast<ClassTemplateSpecializationDecl>(RDecl)) { 4199 const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs(); 4200 std::string TemplateArgsStr 4201 = TemplateSpecializationType::PrintTemplateArgumentList( 4202 TemplateArgs.data(), 4203 TemplateArgs.size(), 4204 (*this).PrintingPolicy); 4205 4206 S += TemplateArgsStr; 4207 } 4208 } else { 4209 S += '?'; 4210 } 4211 if (ExpandStructures) { 4212 S += '='; 4213 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 4214 FieldEnd = RDecl->field_end(); 4215 Field != FieldEnd; ++Field) { 4216 if (FD) { 4217 S += '"'; 4218 S += Field->getNameAsString(); 4219 S += '"'; 4220 } 4221 4222 // Special case bit-fields. 4223 if (Field->isBitField()) { 4224 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, 4225 (*Field)); 4226 } else { 4227 QualType qt = Field->getType(); 4228 getLegacyIntegralTypeEncoding(qt); 4229 getObjCEncodingForTypeImpl(qt, S, false, true, 4230 FD); 4231 } 4232 } 4233 } 4234 S += RDecl->isUnion() ? ')' : '}'; 4235 return; 4236 } 4237 4238 if (T->isEnumeralType()) { 4239 if (FD && FD->isBitField()) 4240 EncodeBitField(this, S, T, FD); 4241 else 4242 S += 'i'; 4243 return; 4244 } 4245 4246 if (T->isBlockPointerType()) { 4247 S += "@?"; // Unlike a pointer-to-function, which is "^?". 4248 return; 4249 } 4250 4251 // Ignore protocol qualifiers when mangling at this level. 4252 if (const ObjCObjectType *OT = T->getAs<ObjCObjectType>()) 4253 T = OT->getBaseType(); 4254 4255 if (const ObjCInterfaceType *OIT = T->getAs<ObjCInterfaceType>()) { 4256 // @encode(class_name) 4257 ObjCInterfaceDecl *OI = OIT->getDecl(); 4258 S += '{'; 4259 const IdentifierInfo *II = OI->getIdentifier(); 4260 S += II->getName(); 4261 S += '='; 4262 llvm::SmallVector<ObjCIvarDecl*, 32> Ivars; 4263 DeepCollectObjCIvars(OI, true, Ivars); 4264 for (unsigned i = 0, e = Ivars.size(); i != e; ++i) { 4265 FieldDecl *Field = cast<FieldDecl>(Ivars[i]); 4266 if (Field->isBitField()) 4267 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, Field); 4268 else 4269 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, FD); 4270 } 4271 S += '}'; 4272 return; 4273 } 4274 4275 if (const ObjCObjectPointerType *OPT = T->getAs<ObjCObjectPointerType>()) { 4276 if (OPT->isObjCIdType()) { 4277 S += '@'; 4278 return; 4279 } 4280 4281 if (OPT->isObjCClassType() || OPT->isObjCQualifiedClassType()) { 4282 // FIXME: Consider if we need to output qualifiers for 'Class<p>'. 4283 // Since this is a binary compatibility issue, need to consult with runtime 4284 // folks. Fortunately, this is a *very* obsure construct. 4285 S += '#'; 4286 return; 4287 } 4288 4289 if (OPT->isObjCQualifiedIdType()) { 4290 getObjCEncodingForTypeImpl(getObjCIdType(), S, 4291 ExpandPointedToStructures, 4292 ExpandStructures, FD); 4293 if (FD || EncodingProperty) { 4294 // Note that we do extended encoding of protocol qualifer list 4295 // Only when doing ivar or property encoding. 4296 S += '"'; 4297 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 4298 E = OPT->qual_end(); I != E; ++I) { 4299 S += '<'; 4300 S += (*I)->getNameAsString(); 4301 S += '>'; 4302 } 4303 S += '"'; 4304 } 4305 return; 4306 } 4307 4308 QualType PointeeTy = OPT->getPointeeType(); 4309 if (!EncodingProperty && 4310 isa<TypedefType>(PointeeTy.getTypePtr())) { 4311 // Another historical/compatibility reason. 4312 // We encode the underlying type which comes out as 4313 // {...}; 4314 S += '^'; 4315 getObjCEncodingForTypeImpl(PointeeTy, S, 4316 false, ExpandPointedToStructures, 4317 NULL); 4318 return; 4319 } 4320 4321 S += '@'; 4322 if (OPT->getInterfaceDecl() && (FD || EncodingProperty)) { 4323 S += '"'; 4324 S += OPT->getInterfaceDecl()->getIdentifier()->getName(); 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 // gcc just blithely ignores member pointers. 4337 // TODO: maybe there should be a mangling for these 4338 if (T->getAs<MemberPointerType>()) 4339 return; 4340 4341 if (T->isVectorType()) { 4342 // This matches gcc's encoding, even though technically it is 4343 // insufficient. 4344 // FIXME. We should do a better job than gcc. 4345 return; 4346 } 4347 4348 assert(0 && "@encode for type not implemented!"); 4349} 4350 4351void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 4352 std::string& S) const { 4353 if (QT & Decl::OBJC_TQ_In) 4354 S += 'n'; 4355 if (QT & Decl::OBJC_TQ_Inout) 4356 S += 'N'; 4357 if (QT & Decl::OBJC_TQ_Out) 4358 S += 'o'; 4359 if (QT & Decl::OBJC_TQ_Bycopy) 4360 S += 'O'; 4361 if (QT & Decl::OBJC_TQ_Byref) 4362 S += 'R'; 4363 if (QT & Decl::OBJC_TQ_Oneway) 4364 S += 'V'; 4365} 4366 4367void ASTContext::setBuiltinVaListType(QualType T) { 4368 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!"); 4369 4370 BuiltinVaListType = T; 4371} 4372 4373void ASTContext::setObjCIdType(QualType T) { 4374 ObjCIdTypedefType = T; 4375} 4376 4377void ASTContext::setObjCSelType(QualType T) { 4378 ObjCSelTypedefType = T; 4379} 4380 4381void ASTContext::setObjCProtoType(QualType QT) { 4382 ObjCProtoType = QT; 4383} 4384 4385void ASTContext::setObjCClassType(QualType T) { 4386 ObjCClassTypedefType = T; 4387} 4388 4389void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) { 4390 assert(ObjCConstantStringType.isNull() && 4391 "'NSConstantString' type already set!"); 4392 4393 ObjCConstantStringType = getObjCInterfaceType(Decl); 4394} 4395 4396/// \brief Retrieve the template name that corresponds to a non-empty 4397/// lookup. 4398TemplateName 4399ASTContext::getOverloadedTemplateName(UnresolvedSetIterator Begin, 4400 UnresolvedSetIterator End) const { 4401 unsigned size = End - Begin; 4402 assert(size > 1 && "set is not overloaded!"); 4403 4404 void *memory = Allocate(sizeof(OverloadedTemplateStorage) + 4405 size * sizeof(FunctionTemplateDecl*)); 4406 OverloadedTemplateStorage *OT = new(memory) OverloadedTemplateStorage(size); 4407 4408 NamedDecl **Storage = OT->getStorage(); 4409 for (UnresolvedSetIterator I = Begin; I != End; ++I) { 4410 NamedDecl *D = *I; 4411 assert(isa<FunctionTemplateDecl>(D) || 4412 (isa<UsingShadowDecl>(D) && 4413 isa<FunctionTemplateDecl>(D->getUnderlyingDecl()))); 4414 *Storage++ = D; 4415 } 4416 4417 return TemplateName(OT); 4418} 4419 4420/// \brief Retrieve the template name that represents a qualified 4421/// template name such as \c std::vector. 4422TemplateName 4423ASTContext::getQualifiedTemplateName(NestedNameSpecifier *NNS, 4424 bool TemplateKeyword, 4425 TemplateDecl *Template) const { 4426 assert(NNS && "Missing nested-name-specifier in qualified template name"); 4427 4428 // FIXME: Canonicalization? 4429 llvm::FoldingSetNodeID ID; 4430 QualifiedTemplateName::Profile(ID, NNS, TemplateKeyword, Template); 4431 4432 void *InsertPos = 0; 4433 QualifiedTemplateName *QTN = 4434 QualifiedTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4435 if (!QTN) { 4436 QTN = new (*this,4) QualifiedTemplateName(NNS, TemplateKeyword, Template); 4437 QualifiedTemplateNames.InsertNode(QTN, InsertPos); 4438 } 4439 4440 return TemplateName(QTN); 4441} 4442 4443/// \brief Retrieve the template name that represents a dependent 4444/// template name such as \c MetaFun::template apply. 4445TemplateName 4446ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 4447 const IdentifierInfo *Name) const { 4448 assert((!NNS || NNS->isDependent()) && 4449 "Nested name specifier must be dependent"); 4450 4451 llvm::FoldingSetNodeID ID; 4452 DependentTemplateName::Profile(ID, NNS, Name); 4453 4454 void *InsertPos = 0; 4455 DependentTemplateName *QTN = 4456 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4457 4458 if (QTN) 4459 return TemplateName(QTN); 4460 4461 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 4462 if (CanonNNS == NNS) { 4463 QTN = new (*this,4) DependentTemplateName(NNS, Name); 4464 } else { 4465 TemplateName Canon = getDependentTemplateName(CanonNNS, Name); 4466 QTN = new (*this,4) DependentTemplateName(NNS, Name, Canon); 4467 DependentTemplateName *CheckQTN = 4468 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4469 assert(!CheckQTN && "Dependent type name canonicalization broken"); 4470 (void)CheckQTN; 4471 } 4472 4473 DependentTemplateNames.InsertNode(QTN, InsertPos); 4474 return TemplateName(QTN); 4475} 4476 4477/// \brief Retrieve the template name that represents a dependent 4478/// template name such as \c MetaFun::template operator+. 4479TemplateName 4480ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 4481 OverloadedOperatorKind Operator) const { 4482 assert((!NNS || NNS->isDependent()) && 4483 "Nested name specifier must be dependent"); 4484 4485 llvm::FoldingSetNodeID ID; 4486 DependentTemplateName::Profile(ID, NNS, Operator); 4487 4488 void *InsertPos = 0; 4489 DependentTemplateName *QTN 4490 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4491 4492 if (QTN) 4493 return TemplateName(QTN); 4494 4495 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 4496 if (CanonNNS == NNS) { 4497 QTN = new (*this,4) DependentTemplateName(NNS, Operator); 4498 } else { 4499 TemplateName Canon = getDependentTemplateName(CanonNNS, Operator); 4500 QTN = new (*this,4) DependentTemplateName(NNS, Operator, Canon); 4501 4502 DependentTemplateName *CheckQTN 4503 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4504 assert(!CheckQTN && "Dependent template name canonicalization broken"); 4505 (void)CheckQTN; 4506 } 4507 4508 DependentTemplateNames.InsertNode(QTN, InsertPos); 4509 return TemplateName(QTN); 4510} 4511 4512TemplateName 4513ASTContext::getSubstTemplateTemplateParmPack(TemplateTemplateParmDecl *Param, 4514 const TemplateArgument &ArgPack) const { 4515 ASTContext &Self = const_cast<ASTContext &>(*this); 4516 llvm::FoldingSetNodeID ID; 4517 SubstTemplateTemplateParmPackStorage::Profile(ID, Self, Param, ArgPack); 4518 4519 void *InsertPos = 0; 4520 SubstTemplateTemplateParmPackStorage *Subst 4521 = SubstTemplateTemplateParmPacks.FindNodeOrInsertPos(ID, InsertPos); 4522 4523 if (!Subst) { 4524 Subst = new (*this) SubstTemplateTemplateParmPackStorage(Self, Param, 4525 ArgPack.pack_size(), 4526 ArgPack.pack_begin()); 4527 SubstTemplateTemplateParmPacks.InsertNode(Subst, InsertPos); 4528 } 4529 4530 return TemplateName(Subst); 4531} 4532 4533/// getFromTargetType - Given one of the integer types provided by 4534/// TargetInfo, produce the corresponding type. The unsigned @p Type 4535/// is actually a value of type @c TargetInfo::IntType. 4536CanQualType ASTContext::getFromTargetType(unsigned Type) const { 4537 switch (Type) { 4538 case TargetInfo::NoInt: return CanQualType(); 4539 case TargetInfo::SignedShort: return ShortTy; 4540 case TargetInfo::UnsignedShort: return UnsignedShortTy; 4541 case TargetInfo::SignedInt: return IntTy; 4542 case TargetInfo::UnsignedInt: return UnsignedIntTy; 4543 case TargetInfo::SignedLong: return LongTy; 4544 case TargetInfo::UnsignedLong: return UnsignedLongTy; 4545 case TargetInfo::SignedLongLong: return LongLongTy; 4546 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy; 4547 } 4548 4549 assert(false && "Unhandled TargetInfo::IntType value"); 4550 return CanQualType(); 4551} 4552 4553//===----------------------------------------------------------------------===// 4554// Type Predicates. 4555//===----------------------------------------------------------------------===// 4556 4557/// isObjCNSObjectType - Return true if this is an NSObject object using 4558/// NSObject attribute on a c-style pointer type. 4559/// FIXME - Make it work directly on types. 4560/// FIXME: Move to Type. 4561/// 4562bool ASTContext::isObjCNSObjectType(QualType Ty) const { 4563 if (const TypedefType *TDT = dyn_cast<TypedefType>(Ty)) { 4564 if (TypedefDecl *TD = TDT->getDecl()) 4565 if (TD->getAttr<ObjCNSObjectAttr>()) 4566 return true; 4567 } 4568 return false; 4569} 4570 4571/// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 4572/// garbage collection attribute. 4573/// 4574Qualifiers::GC ASTContext::getObjCGCAttrKind(QualType Ty) const { 4575 if (getLangOptions().getGCMode() == LangOptions::NonGC) 4576 return Qualifiers::GCNone; 4577 4578 assert(getLangOptions().ObjC1); 4579 Qualifiers::GC GCAttrs = Ty.getObjCGCAttr(); 4580 4581 // Default behaviour under objective-C's gc is for ObjC pointers 4582 // (or pointers to them) be treated as though they were declared 4583 // as __strong. 4584 if (GCAttrs == Qualifiers::GCNone) { 4585 if (Ty->isObjCObjectPointerType() || Ty->isBlockPointerType()) 4586 return Qualifiers::Strong; 4587 else if (Ty->isPointerType()) 4588 return getObjCGCAttrKind(Ty->getAs<PointerType>()->getPointeeType()); 4589 } else { 4590 // It's not valid to set GC attributes on anything that isn't a 4591 // pointer. 4592#ifndef NDEBUG 4593 QualType CT = Ty->getCanonicalTypeInternal(); 4594 while (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 4595 CT = AT->getElementType(); 4596 assert(CT->isAnyPointerType() || CT->isBlockPointerType()); 4597#endif 4598 } 4599 return GCAttrs; 4600} 4601 4602//===----------------------------------------------------------------------===// 4603// Type Compatibility Testing 4604//===----------------------------------------------------------------------===// 4605 4606/// areCompatVectorTypes - Return true if the two specified vector types are 4607/// compatible. 4608static bool areCompatVectorTypes(const VectorType *LHS, 4609 const VectorType *RHS) { 4610 assert(LHS->isCanonicalUnqualified() && RHS->isCanonicalUnqualified()); 4611 return LHS->getElementType() == RHS->getElementType() && 4612 LHS->getNumElements() == RHS->getNumElements(); 4613} 4614 4615bool ASTContext::areCompatibleVectorTypes(QualType FirstVec, 4616 QualType SecondVec) { 4617 assert(FirstVec->isVectorType() && "FirstVec should be a vector type"); 4618 assert(SecondVec->isVectorType() && "SecondVec should be a vector type"); 4619 4620 if (hasSameUnqualifiedType(FirstVec, SecondVec)) 4621 return true; 4622 4623 // Treat Neon vector types and most AltiVec vector types as if they are the 4624 // equivalent GCC vector types. 4625 const VectorType *First = FirstVec->getAs<VectorType>(); 4626 const VectorType *Second = SecondVec->getAs<VectorType>(); 4627 if (First->getNumElements() == Second->getNumElements() && 4628 hasSameType(First->getElementType(), Second->getElementType()) && 4629 First->getVectorKind() != VectorType::AltiVecPixel && 4630 First->getVectorKind() != VectorType::AltiVecBool && 4631 Second->getVectorKind() != VectorType::AltiVecPixel && 4632 Second->getVectorKind() != VectorType::AltiVecBool) 4633 return true; 4634 4635 return false; 4636} 4637 4638//===----------------------------------------------------------------------===// 4639// ObjCQualifiedIdTypesAreCompatible - Compatibility testing for qualified id's. 4640//===----------------------------------------------------------------------===// 4641 4642/// ProtocolCompatibleWithProtocol - return 'true' if 'lProto' is in the 4643/// inheritance hierarchy of 'rProto'. 4644bool 4645ASTContext::ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 4646 ObjCProtocolDecl *rProto) const { 4647 if (lProto == rProto) 4648 return true; 4649 for (ObjCProtocolDecl::protocol_iterator PI = rProto->protocol_begin(), 4650 E = rProto->protocol_end(); PI != E; ++PI) 4651 if (ProtocolCompatibleWithProtocol(lProto, *PI)) 4652 return true; 4653 return false; 4654} 4655 4656/// QualifiedIdConformsQualifiedId - compare id<p,...> with id<p1,...> 4657/// return true if lhs's protocols conform to rhs's protocol; false 4658/// otherwise. 4659bool ASTContext::QualifiedIdConformsQualifiedId(QualType lhs, QualType rhs) { 4660 if (lhs->isObjCQualifiedIdType() && rhs->isObjCQualifiedIdType()) 4661 return ObjCQualifiedIdTypesAreCompatible(lhs, rhs, false); 4662 return false; 4663} 4664 4665/// ObjCQualifiedClassTypesAreCompatible - compare Class<p,...> and 4666/// Class<p1, ...>. 4667bool ASTContext::ObjCQualifiedClassTypesAreCompatible(QualType lhs, 4668 QualType rhs) { 4669 const ObjCObjectPointerType *lhsQID = lhs->getAs<ObjCObjectPointerType>(); 4670 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 4671 assert ((lhsQID && rhsOPT) && "ObjCQualifiedClassTypesAreCompatible"); 4672 4673 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4674 E = lhsQID->qual_end(); I != E; ++I) { 4675 bool match = false; 4676 ObjCProtocolDecl *lhsProto = *I; 4677 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 4678 E = rhsOPT->qual_end(); J != E; ++J) { 4679 ObjCProtocolDecl *rhsProto = *J; 4680 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto)) { 4681 match = true; 4682 break; 4683 } 4684 } 4685 if (!match) 4686 return false; 4687 } 4688 return true; 4689} 4690 4691/// ObjCQualifiedIdTypesAreCompatible - We know that one of lhs/rhs is an 4692/// ObjCQualifiedIDType. 4693bool ASTContext::ObjCQualifiedIdTypesAreCompatible(QualType lhs, QualType rhs, 4694 bool compare) { 4695 // Allow id<P..> and an 'id' or void* type in all cases. 4696 if (lhs->isVoidPointerType() || 4697 lhs->isObjCIdType() || lhs->isObjCClassType()) 4698 return true; 4699 else if (rhs->isVoidPointerType() || 4700 rhs->isObjCIdType() || rhs->isObjCClassType()) 4701 return true; 4702 4703 if (const ObjCObjectPointerType *lhsQID = lhs->getAsObjCQualifiedIdType()) { 4704 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 4705 4706 if (!rhsOPT) return false; 4707 4708 if (rhsOPT->qual_empty()) { 4709 // If the RHS is a unqualified interface pointer "NSString*", 4710 // make sure we check the class hierarchy. 4711 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4712 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4713 E = lhsQID->qual_end(); I != E; ++I) { 4714 // when comparing an id<P> on lhs with a static type on rhs, 4715 // see if static class implements all of id's protocols, directly or 4716 // through its super class and categories. 4717 if (!rhsID->ClassImplementsProtocol(*I, true)) 4718 return false; 4719 } 4720 } 4721 // If there are no qualifiers and no interface, we have an 'id'. 4722 return true; 4723 } 4724 // Both the right and left sides have qualifiers. 4725 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4726 E = lhsQID->qual_end(); I != E; ++I) { 4727 ObjCProtocolDecl *lhsProto = *I; 4728 bool match = false; 4729 4730 // when comparing an id<P> on lhs with a static type on rhs, 4731 // see if static class implements all of id's protocols, directly or 4732 // through its super class and categories. 4733 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 4734 E = rhsOPT->qual_end(); J != E; ++J) { 4735 ObjCProtocolDecl *rhsProto = *J; 4736 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4737 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4738 match = true; 4739 break; 4740 } 4741 } 4742 // If the RHS is a qualified interface pointer "NSString<P>*", 4743 // make sure we check the class hierarchy. 4744 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4745 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4746 E = lhsQID->qual_end(); I != E; ++I) { 4747 // when comparing an id<P> on lhs with a static type on rhs, 4748 // see if static class implements all of id's protocols, directly or 4749 // through its super class and categories. 4750 if (rhsID->ClassImplementsProtocol(*I, true)) { 4751 match = true; 4752 break; 4753 } 4754 } 4755 } 4756 if (!match) 4757 return false; 4758 } 4759 4760 return true; 4761 } 4762 4763 const ObjCObjectPointerType *rhsQID = rhs->getAsObjCQualifiedIdType(); 4764 assert(rhsQID && "One of the LHS/RHS should be id<x>"); 4765 4766 if (const ObjCObjectPointerType *lhsOPT = 4767 lhs->getAsObjCInterfacePointerType()) { 4768 // If both the right and left sides have qualifiers. 4769 for (ObjCObjectPointerType::qual_iterator I = lhsOPT->qual_begin(), 4770 E = lhsOPT->qual_end(); I != E; ++I) { 4771 ObjCProtocolDecl *lhsProto = *I; 4772 bool match = false; 4773 4774 // when comparing an id<P> on rhs with a static type on lhs, 4775 // see if static class implements all of id's protocols, directly or 4776 // through its super class and categories. 4777 // First, lhs protocols in the qualifier list must be found, direct 4778 // or indirect in rhs's qualifier list or it is a mismatch. 4779 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 4780 E = rhsQID->qual_end(); J != E; ++J) { 4781 ObjCProtocolDecl *rhsProto = *J; 4782 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4783 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4784 match = true; 4785 break; 4786 } 4787 } 4788 if (!match) 4789 return false; 4790 } 4791 4792 // Static class's protocols, or its super class or category protocols 4793 // must be found, direct or indirect in rhs's qualifier list or it is a mismatch. 4794 if (ObjCInterfaceDecl *lhsID = lhsOPT->getInterfaceDecl()) { 4795 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 4796 CollectInheritedProtocols(lhsID, LHSInheritedProtocols); 4797 // This is rather dubious but matches gcc's behavior. If lhs has 4798 // no type qualifier and its class has no static protocol(s) 4799 // assume that it is mismatch. 4800 if (LHSInheritedProtocols.empty() && lhsOPT->qual_empty()) 4801 return false; 4802 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 4803 LHSInheritedProtocols.begin(), 4804 E = LHSInheritedProtocols.end(); I != E; ++I) { 4805 bool match = false; 4806 ObjCProtocolDecl *lhsProto = (*I); 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 return true; 4821 } 4822 return false; 4823} 4824 4825/// canAssignObjCInterfaces - Return true if the two interface types are 4826/// compatible for assignment from RHS to LHS. This handles validation of any 4827/// protocol qualifiers on the LHS or RHS. 4828/// 4829bool ASTContext::canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 4830 const ObjCObjectPointerType *RHSOPT) { 4831 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 4832 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 4833 4834 // If either type represents the built-in 'id' or 'Class' types, return true. 4835 if (LHS->isObjCUnqualifiedIdOrClass() || 4836 RHS->isObjCUnqualifiedIdOrClass()) 4837 return true; 4838 4839 if (LHS->isObjCQualifiedId() || RHS->isObjCQualifiedId()) 4840 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4841 QualType(RHSOPT,0), 4842 false); 4843 4844 if (LHS->isObjCQualifiedClass() && RHS->isObjCQualifiedClass()) 4845 return ObjCQualifiedClassTypesAreCompatible(QualType(LHSOPT,0), 4846 QualType(RHSOPT,0)); 4847 4848 // If we have 2 user-defined types, fall into that path. 4849 if (LHS->getInterface() && RHS->getInterface()) 4850 return canAssignObjCInterfaces(LHS, RHS); 4851 4852 return false; 4853} 4854 4855/// canAssignObjCInterfacesInBlockPointer - This routine is specifically written 4856/// for providing type-safty for objective-c pointers used to pass/return 4857/// arguments in block literals. When passed as arguments, passing 'A*' where 4858/// 'id' is expected is not OK. Passing 'Sub *" where 'Super *" is expected is 4859/// not OK. For the return type, the opposite is not OK. 4860bool ASTContext::canAssignObjCInterfacesInBlockPointer( 4861 const ObjCObjectPointerType *LHSOPT, 4862 const ObjCObjectPointerType *RHSOPT, 4863 bool BlockReturnType) { 4864 if (RHSOPT->isObjCBuiltinType() || LHSOPT->isObjCIdType()) 4865 return true; 4866 4867 if (LHSOPT->isObjCBuiltinType()) { 4868 return RHSOPT->isObjCBuiltinType() || RHSOPT->isObjCQualifiedIdType(); 4869 } 4870 4871 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 4872 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4873 QualType(RHSOPT,0), 4874 false); 4875 4876 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4877 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4878 if (LHS && RHS) { // We have 2 user-defined types. 4879 if (LHS != RHS) { 4880 if (LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 4881 return BlockReturnType; 4882 if (RHS->getDecl()->isSuperClassOf(LHS->getDecl())) 4883 return !BlockReturnType; 4884 } 4885 else 4886 return true; 4887 } 4888 return false; 4889} 4890 4891/// getIntersectionOfProtocols - This routine finds the intersection of set 4892/// of protocols inherited from two distinct objective-c pointer objects. 4893/// It is used to build composite qualifier list of the composite type of 4894/// the conditional expression involving two objective-c pointer objects. 4895static 4896void getIntersectionOfProtocols(ASTContext &Context, 4897 const ObjCObjectPointerType *LHSOPT, 4898 const ObjCObjectPointerType *RHSOPT, 4899 llvm::SmallVectorImpl<ObjCProtocolDecl *> &IntersectionOfProtocols) { 4900 4901 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 4902 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 4903 assert(LHS->getInterface() && "LHS must have an interface base"); 4904 assert(RHS->getInterface() && "RHS must have an interface base"); 4905 4906 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> InheritedProtocolSet; 4907 unsigned LHSNumProtocols = LHS->getNumProtocols(); 4908 if (LHSNumProtocols > 0) 4909 InheritedProtocolSet.insert(LHS->qual_begin(), LHS->qual_end()); 4910 else { 4911 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 4912 Context.CollectInheritedProtocols(LHS->getInterface(), 4913 LHSInheritedProtocols); 4914 InheritedProtocolSet.insert(LHSInheritedProtocols.begin(), 4915 LHSInheritedProtocols.end()); 4916 } 4917 4918 unsigned RHSNumProtocols = RHS->getNumProtocols(); 4919 if (RHSNumProtocols > 0) { 4920 ObjCProtocolDecl **RHSProtocols = 4921 const_cast<ObjCProtocolDecl **>(RHS->qual_begin()); 4922 for (unsigned i = 0; i < RHSNumProtocols; ++i) 4923 if (InheritedProtocolSet.count(RHSProtocols[i])) 4924 IntersectionOfProtocols.push_back(RHSProtocols[i]); 4925 } 4926 else { 4927 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> RHSInheritedProtocols; 4928 Context.CollectInheritedProtocols(RHS->getInterface(), 4929 RHSInheritedProtocols); 4930 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 4931 RHSInheritedProtocols.begin(), 4932 E = RHSInheritedProtocols.end(); I != E; ++I) 4933 if (InheritedProtocolSet.count((*I))) 4934 IntersectionOfProtocols.push_back((*I)); 4935 } 4936} 4937 4938/// areCommonBaseCompatible - Returns common base class of the two classes if 4939/// one found. Note that this is O'2 algorithm. But it will be called as the 4940/// last type comparison in a ?-exp of ObjC pointer types before a 4941/// warning is issued. So, its invokation is extremely rare. 4942QualType ASTContext::areCommonBaseCompatible( 4943 const ObjCObjectPointerType *Lptr, 4944 const ObjCObjectPointerType *Rptr) { 4945 const ObjCObjectType *LHS = Lptr->getObjectType(); 4946 const ObjCObjectType *RHS = Rptr->getObjectType(); 4947 const ObjCInterfaceDecl* LDecl = LHS->getInterface(); 4948 const ObjCInterfaceDecl* RDecl = RHS->getInterface(); 4949 if (!LDecl || !RDecl) 4950 return QualType(); 4951 4952 while ((LDecl = LDecl->getSuperClass())) { 4953 LHS = cast<ObjCInterfaceType>(getObjCInterfaceType(LDecl)); 4954 if (canAssignObjCInterfaces(LHS, RHS)) { 4955 llvm::SmallVector<ObjCProtocolDecl *, 8> Protocols; 4956 getIntersectionOfProtocols(*this, Lptr, Rptr, Protocols); 4957 4958 QualType Result = QualType(LHS, 0); 4959 if (!Protocols.empty()) 4960 Result = getObjCObjectType(Result, Protocols.data(), Protocols.size()); 4961 Result = getObjCObjectPointerType(Result); 4962 return Result; 4963 } 4964 } 4965 4966 return QualType(); 4967} 4968 4969bool ASTContext::canAssignObjCInterfaces(const ObjCObjectType *LHS, 4970 const ObjCObjectType *RHS) { 4971 assert(LHS->getInterface() && "LHS is not an interface type"); 4972 assert(RHS->getInterface() && "RHS is not an interface type"); 4973 4974 // Verify that the base decls are compatible: the RHS must be a subclass of 4975 // the LHS. 4976 if (!LHS->getInterface()->isSuperClassOf(RHS->getInterface())) 4977 return false; 4978 4979 // RHS must have a superset of the protocols in the LHS. If the LHS is not 4980 // protocol qualified at all, then we are good. 4981 if (LHS->getNumProtocols() == 0) 4982 return true; 4983 4984 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, 4985 // more detailed analysis is required. 4986 if (RHS->getNumProtocols() == 0) { 4987 // OK, if LHS is a superclass of RHS *and* 4988 // this superclass is assignment compatible with LHS. 4989 // false otherwise. 4990 ObjCInterfaceDecl *SuperClass = 4991 RHS->getInterface()->getImmSubClassOf(LHS->getInterface()); 4992 if (SuperClass) { 4993 // OK if conversion of LHS to SuperClass results in narrowing of types 4994 // ; i.e., SuperClass may implement at least one of the protocols 4995 // in LHS's protocol list. Example, SuperObj<P1> = lhs<P1,P2> is ok. 4996 // But not SuperObj<P1,P2,P3> = lhs<P1,P2>. 4997 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> SuperClassInheritedProtocols; 4998 CollectInheritedProtocols(SuperClass, SuperClassInheritedProtocols); 4999 // If super class has no protocols, it is not a match. 5000 if (SuperClassInheritedProtocols.empty()) 5001 return false; 5002 5003 for (ObjCObjectType::qual_iterator LHSPI = LHS->qual_begin(), 5004 LHSPE = LHS->qual_end(); 5005 LHSPI != LHSPE; LHSPI++) { 5006 bool SuperImplementsProtocol = false; 5007 ObjCProtocolDecl *LHSProto = (*LHSPI); 5008 5009 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 5010 SuperClassInheritedProtocols.begin(), 5011 E = SuperClassInheritedProtocols.end(); I != E; ++I) { 5012 ObjCProtocolDecl *SuperClassProto = (*I); 5013 if (SuperClassProto->lookupProtocolNamed(LHSProto->getIdentifier())) { 5014 SuperImplementsProtocol = true; 5015 break; 5016 } 5017 } 5018 if (!SuperImplementsProtocol) 5019 return false; 5020 } 5021 return true; 5022 } 5023 return false; 5024 } 5025 5026 for (ObjCObjectType::qual_iterator LHSPI = LHS->qual_begin(), 5027 LHSPE = LHS->qual_end(); 5028 LHSPI != LHSPE; LHSPI++) { 5029 bool RHSImplementsProtocol = false; 5030 5031 // If the RHS doesn't implement the protocol on the left, the types 5032 // are incompatible. 5033 for (ObjCObjectType::qual_iterator RHSPI = RHS->qual_begin(), 5034 RHSPE = RHS->qual_end(); 5035 RHSPI != RHSPE; RHSPI++) { 5036 if ((*RHSPI)->lookupProtocolNamed((*LHSPI)->getIdentifier())) { 5037 RHSImplementsProtocol = true; 5038 break; 5039 } 5040 } 5041 // FIXME: For better diagnostics, consider passing back the protocol name. 5042 if (!RHSImplementsProtocol) 5043 return false; 5044 } 5045 // The RHS implements all protocols listed on the LHS. 5046 return true; 5047} 5048 5049bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) { 5050 // get the "pointed to" types 5051 const ObjCObjectPointerType *LHSOPT = LHS->getAs<ObjCObjectPointerType>(); 5052 const ObjCObjectPointerType *RHSOPT = RHS->getAs<ObjCObjectPointerType>(); 5053 5054 if (!LHSOPT || !RHSOPT) 5055 return false; 5056 5057 return canAssignObjCInterfaces(LHSOPT, RHSOPT) || 5058 canAssignObjCInterfaces(RHSOPT, LHSOPT); 5059} 5060 5061bool ASTContext::canBindObjCObjectType(QualType To, QualType From) { 5062 return canAssignObjCInterfaces( 5063 getObjCObjectPointerType(To)->getAs<ObjCObjectPointerType>(), 5064 getObjCObjectPointerType(From)->getAs<ObjCObjectPointerType>()); 5065} 5066 5067/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible, 5068/// both shall have the identically qualified version of a compatible type. 5069/// C99 6.2.7p1: Two types have compatible types if their types are the 5070/// same. See 6.7.[2,3,5] for additional rules. 5071bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS, 5072 bool CompareUnqualified) { 5073 if (getLangOptions().CPlusPlus) 5074 return hasSameType(LHS, RHS); 5075 5076 return !mergeTypes(LHS, RHS, false, CompareUnqualified).isNull(); 5077} 5078 5079bool ASTContext::typesAreBlockPointerCompatible(QualType LHS, QualType RHS) { 5080 return !mergeTypes(LHS, RHS, true).isNull(); 5081} 5082 5083/// mergeTransparentUnionType - if T is a transparent union type and a member 5084/// of T is compatible with SubType, return the merged type, else return 5085/// QualType() 5086QualType ASTContext::mergeTransparentUnionType(QualType T, QualType SubType, 5087 bool OfBlockPointer, 5088 bool Unqualified) { 5089 if (const RecordType *UT = T->getAsUnionType()) { 5090 RecordDecl *UD = UT->getDecl(); 5091 if (UD->hasAttr<TransparentUnionAttr>()) { 5092 for (RecordDecl::field_iterator it = UD->field_begin(), 5093 itend = UD->field_end(); it != itend; ++it) { 5094 QualType ET = it->getType().getUnqualifiedType(); 5095 QualType MT = mergeTypes(ET, SubType, OfBlockPointer, Unqualified); 5096 if (!MT.isNull()) 5097 return MT; 5098 } 5099 } 5100 } 5101 5102 return QualType(); 5103} 5104 5105/// mergeFunctionArgumentTypes - merge two types which appear as function 5106/// argument types 5107QualType ASTContext::mergeFunctionArgumentTypes(QualType lhs, QualType rhs, 5108 bool OfBlockPointer, 5109 bool Unqualified) { 5110 // GNU extension: two types are compatible if they appear as a function 5111 // argument, one of the types is a transparent union type and the other 5112 // type is compatible with a union member 5113 QualType lmerge = mergeTransparentUnionType(lhs, rhs, OfBlockPointer, 5114 Unqualified); 5115 if (!lmerge.isNull()) 5116 return lmerge; 5117 5118 QualType rmerge = mergeTransparentUnionType(rhs, lhs, OfBlockPointer, 5119 Unqualified); 5120 if (!rmerge.isNull()) 5121 return rmerge; 5122 5123 return mergeTypes(lhs, rhs, OfBlockPointer, Unqualified); 5124} 5125 5126QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs, 5127 bool OfBlockPointer, 5128 bool Unqualified) { 5129 const FunctionType *lbase = lhs->getAs<FunctionType>(); 5130 const FunctionType *rbase = rhs->getAs<FunctionType>(); 5131 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 5132 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 5133 bool allLTypes = true; 5134 bool allRTypes = true; 5135 5136 // Check return type 5137 QualType retType; 5138 if (OfBlockPointer) { 5139 QualType RHS = rbase->getResultType(); 5140 QualType LHS = lbase->getResultType(); 5141 bool UnqualifiedResult = Unqualified; 5142 if (!UnqualifiedResult) 5143 UnqualifiedResult = (!RHS.hasQualifiers() && LHS.hasQualifiers()); 5144 retType = mergeTypes(LHS, RHS, true, UnqualifiedResult, true); 5145 } 5146 else 5147 retType = mergeTypes(lbase->getResultType(), rbase->getResultType(), false, 5148 Unqualified); 5149 if (retType.isNull()) return QualType(); 5150 5151 if (Unqualified) 5152 retType = retType.getUnqualifiedType(); 5153 5154 CanQualType LRetType = getCanonicalType(lbase->getResultType()); 5155 CanQualType RRetType = getCanonicalType(rbase->getResultType()); 5156 if (Unqualified) { 5157 LRetType = LRetType.getUnqualifiedType(); 5158 RRetType = RRetType.getUnqualifiedType(); 5159 } 5160 5161 if (getCanonicalType(retType) != LRetType) 5162 allLTypes = false; 5163 if (getCanonicalType(retType) != RRetType) 5164 allRTypes = false; 5165 5166 // FIXME: double check this 5167 // FIXME: should we error if lbase->getRegParmAttr() != 0 && 5168 // rbase->getRegParmAttr() != 0 && 5169 // lbase->getRegParmAttr() != rbase->getRegParmAttr()? 5170 FunctionType::ExtInfo lbaseInfo = lbase->getExtInfo(); 5171 FunctionType::ExtInfo rbaseInfo = rbase->getExtInfo(); 5172 5173 // Compatible functions must have compatible calling conventions 5174 if (!isSameCallConv(lbaseInfo.getCC(), rbaseInfo.getCC())) 5175 return QualType(); 5176 5177 // Regparm is part of the calling convention. 5178 if (lbaseInfo.getRegParm() != rbaseInfo.getRegParm()) 5179 return QualType(); 5180 5181 // It's noreturn if either type is. 5182 // FIXME: some uses, e.g. conditional exprs, really want this to be 'both'. 5183 bool NoReturn = lbaseInfo.getNoReturn() || rbaseInfo.getNoReturn(); 5184 if (NoReturn != lbaseInfo.getNoReturn()) 5185 allLTypes = false; 5186 if (NoReturn != rbaseInfo.getNoReturn()) 5187 allRTypes = false; 5188 5189 FunctionType::ExtInfo einfo(NoReturn, 5190 lbaseInfo.getRegParm(), 5191 lbaseInfo.getCC()); 5192 5193 if (lproto && rproto) { // two C99 style function prototypes 5194 assert(!lproto->hasExceptionSpec() && !rproto->hasExceptionSpec() && 5195 "C++ shouldn't be here"); 5196 unsigned lproto_nargs = lproto->getNumArgs(); 5197 unsigned rproto_nargs = rproto->getNumArgs(); 5198 5199 // Compatible functions must have the same number of arguments 5200 if (lproto_nargs != rproto_nargs) 5201 return QualType(); 5202 5203 // Variadic and non-variadic functions aren't compatible 5204 if (lproto->isVariadic() != rproto->isVariadic()) 5205 return QualType(); 5206 5207 if (lproto->getTypeQuals() != rproto->getTypeQuals()) 5208 return QualType(); 5209 5210 // Check argument compatibility 5211 llvm::SmallVector<QualType, 10> types; 5212 for (unsigned i = 0; i < lproto_nargs; i++) { 5213 QualType largtype = lproto->getArgType(i).getUnqualifiedType(); 5214 QualType rargtype = rproto->getArgType(i).getUnqualifiedType(); 5215 QualType argtype = mergeFunctionArgumentTypes(largtype, rargtype, 5216 OfBlockPointer, 5217 Unqualified); 5218 if (argtype.isNull()) return QualType(); 5219 5220 if (Unqualified) 5221 argtype = argtype.getUnqualifiedType(); 5222 5223 types.push_back(argtype); 5224 if (Unqualified) { 5225 largtype = largtype.getUnqualifiedType(); 5226 rargtype = rargtype.getUnqualifiedType(); 5227 } 5228 5229 if (getCanonicalType(argtype) != getCanonicalType(largtype)) 5230 allLTypes = false; 5231 if (getCanonicalType(argtype) != getCanonicalType(rargtype)) 5232 allRTypes = false; 5233 } 5234 if (allLTypes) return lhs; 5235 if (allRTypes) return rhs; 5236 5237 FunctionProtoType::ExtProtoInfo EPI = lproto->getExtProtoInfo(); 5238 EPI.ExtInfo = einfo; 5239 return getFunctionType(retType, types.begin(), types.size(), EPI); 5240 } 5241 5242 if (lproto) allRTypes = false; 5243 if (rproto) allLTypes = false; 5244 5245 const FunctionProtoType *proto = lproto ? lproto : rproto; 5246 if (proto) { 5247 assert(!proto->hasExceptionSpec() && "C++ shouldn't be here"); 5248 if (proto->isVariadic()) return QualType(); 5249 // Check that the types are compatible with the types that 5250 // would result from default argument promotions (C99 6.7.5.3p15). 5251 // The only types actually affected are promotable integer 5252 // types and floats, which would be passed as a different 5253 // type depending on whether the prototype is visible. 5254 unsigned proto_nargs = proto->getNumArgs(); 5255 for (unsigned i = 0; i < proto_nargs; ++i) { 5256 QualType argTy = proto->getArgType(i); 5257 5258 // Look at the promotion type of enum types, since that is the type used 5259 // to pass enum values. 5260 if (const EnumType *Enum = argTy->getAs<EnumType>()) 5261 argTy = Enum->getDecl()->getPromotionType(); 5262 5263 if (argTy->isPromotableIntegerType() || 5264 getCanonicalType(argTy).getUnqualifiedType() == FloatTy) 5265 return QualType(); 5266 } 5267 5268 if (allLTypes) return lhs; 5269 if (allRTypes) return rhs; 5270 5271 FunctionProtoType::ExtProtoInfo EPI = proto->getExtProtoInfo(); 5272 EPI.ExtInfo = einfo; 5273 return getFunctionType(retType, proto->arg_type_begin(), 5274 proto->getNumArgs(), EPI); 5275 } 5276 5277 if (allLTypes) return lhs; 5278 if (allRTypes) return rhs; 5279 return getFunctionNoProtoType(retType, einfo); 5280} 5281 5282QualType ASTContext::mergeTypes(QualType LHS, QualType RHS, 5283 bool OfBlockPointer, 5284 bool Unqualified, bool BlockReturnType) { 5285 // C++ [expr]: If an expression initially has the type "reference to T", the 5286 // type is adjusted to "T" prior to any further analysis, the expression 5287 // designates the object or function denoted by the reference, and the 5288 // expression is an lvalue unless the reference is an rvalue reference and 5289 // the expression is a function call (possibly inside parentheses). 5290 assert(!LHS->getAs<ReferenceType>() && "LHS is a reference type?"); 5291 assert(!RHS->getAs<ReferenceType>() && "RHS is a reference type?"); 5292 5293 if (Unqualified) { 5294 LHS = LHS.getUnqualifiedType(); 5295 RHS = RHS.getUnqualifiedType(); 5296 } 5297 5298 QualType LHSCan = getCanonicalType(LHS), 5299 RHSCan = getCanonicalType(RHS); 5300 5301 // If two types are identical, they are compatible. 5302 if (LHSCan == RHSCan) 5303 return LHS; 5304 5305 // If the qualifiers are different, the types aren't compatible... mostly. 5306 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 5307 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 5308 if (LQuals != RQuals) { 5309 // If any of these qualifiers are different, we have a type 5310 // mismatch. 5311 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 5312 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 5313 return QualType(); 5314 5315 // Exactly one GC qualifier difference is allowed: __strong is 5316 // okay if the other type has no GC qualifier but is an Objective 5317 // C object pointer (i.e. implicitly strong by default). We fix 5318 // this by pretending that the unqualified type was actually 5319 // qualified __strong. 5320 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 5321 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 5322 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 5323 5324 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 5325 return QualType(); 5326 5327 if (GC_L == Qualifiers::Strong && RHSCan->isObjCObjectPointerType()) { 5328 return mergeTypes(LHS, getObjCGCQualType(RHS, Qualifiers::Strong)); 5329 } 5330 if (GC_R == Qualifiers::Strong && LHSCan->isObjCObjectPointerType()) { 5331 return mergeTypes(getObjCGCQualType(LHS, Qualifiers::Strong), RHS); 5332 } 5333 return QualType(); 5334 } 5335 5336 // Okay, qualifiers are equal. 5337 5338 Type::TypeClass LHSClass = LHSCan->getTypeClass(); 5339 Type::TypeClass RHSClass = RHSCan->getTypeClass(); 5340 5341 // We want to consider the two function types to be the same for these 5342 // comparisons, just force one to the other. 5343 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto; 5344 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto; 5345 5346 // Same as above for arrays 5347 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray) 5348 LHSClass = Type::ConstantArray; 5349 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray) 5350 RHSClass = Type::ConstantArray; 5351 5352 // ObjCInterfaces are just specialized ObjCObjects. 5353 if (LHSClass == Type::ObjCInterface) LHSClass = Type::ObjCObject; 5354 if (RHSClass == Type::ObjCInterface) RHSClass = Type::ObjCObject; 5355 5356 // Canonicalize ExtVector -> Vector. 5357 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector; 5358 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector; 5359 5360 // If the canonical type classes don't match. 5361 if (LHSClass != RHSClass) { 5362 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char, 5363 // a signed integer type, or an unsigned integer type. 5364 // Compatibility is based on the underlying type, not the promotion 5365 // type. 5366 if (const EnumType* ETy = LHS->getAs<EnumType>()) { 5367 if (ETy->getDecl()->getIntegerType() == RHSCan.getUnqualifiedType()) 5368 return RHS; 5369 } 5370 if (const EnumType* ETy = RHS->getAs<EnumType>()) { 5371 if (ETy->getDecl()->getIntegerType() == LHSCan.getUnqualifiedType()) 5372 return LHS; 5373 } 5374 5375 return QualType(); 5376 } 5377 5378 // The canonical type classes match. 5379 switch (LHSClass) { 5380#define TYPE(Class, Base) 5381#define ABSTRACT_TYPE(Class, Base) 5382#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) case Type::Class: 5383#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 5384#define DEPENDENT_TYPE(Class, Base) case Type::Class: 5385#include "clang/AST/TypeNodes.def" 5386 assert(false && "Non-canonical and dependent types shouldn't get here"); 5387 return QualType(); 5388 5389 case Type::LValueReference: 5390 case Type::RValueReference: 5391 case Type::MemberPointer: 5392 assert(false && "C++ should never be in mergeTypes"); 5393 return QualType(); 5394 5395 case Type::ObjCInterface: 5396 case Type::IncompleteArray: 5397 case Type::VariableArray: 5398 case Type::FunctionProto: 5399 case Type::ExtVector: 5400 assert(false && "Types are eliminated above"); 5401 return QualType(); 5402 5403 case Type::Pointer: 5404 { 5405 // Merge two pointer types, while trying to preserve typedef info 5406 QualType LHSPointee = LHS->getAs<PointerType>()->getPointeeType(); 5407 QualType RHSPointee = RHS->getAs<PointerType>()->getPointeeType(); 5408 if (Unqualified) { 5409 LHSPointee = LHSPointee.getUnqualifiedType(); 5410 RHSPointee = RHSPointee.getUnqualifiedType(); 5411 } 5412 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, false, 5413 Unqualified); 5414 if (ResultType.isNull()) return QualType(); 5415 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 5416 return LHS; 5417 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 5418 return RHS; 5419 return getPointerType(ResultType); 5420 } 5421 case Type::BlockPointer: 5422 { 5423 // Merge two block pointer types, while trying to preserve typedef info 5424 QualType LHSPointee = LHS->getAs<BlockPointerType>()->getPointeeType(); 5425 QualType RHSPointee = RHS->getAs<BlockPointerType>()->getPointeeType(); 5426 if (Unqualified) { 5427 LHSPointee = LHSPointee.getUnqualifiedType(); 5428 RHSPointee = RHSPointee.getUnqualifiedType(); 5429 } 5430 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, OfBlockPointer, 5431 Unqualified); 5432 if (ResultType.isNull()) return QualType(); 5433 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 5434 return LHS; 5435 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 5436 return RHS; 5437 return getBlockPointerType(ResultType); 5438 } 5439 case Type::ConstantArray: 5440 { 5441 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS); 5442 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS); 5443 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize()) 5444 return QualType(); 5445 5446 QualType LHSElem = getAsArrayType(LHS)->getElementType(); 5447 QualType RHSElem = getAsArrayType(RHS)->getElementType(); 5448 if (Unqualified) { 5449 LHSElem = LHSElem.getUnqualifiedType(); 5450 RHSElem = RHSElem.getUnqualifiedType(); 5451 } 5452 5453 QualType ResultType = mergeTypes(LHSElem, RHSElem, false, Unqualified); 5454 if (ResultType.isNull()) return QualType(); 5455 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 5456 return LHS; 5457 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 5458 return RHS; 5459 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(), 5460 ArrayType::ArraySizeModifier(), 0); 5461 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(), 5462 ArrayType::ArraySizeModifier(), 0); 5463 const VariableArrayType* LVAT = getAsVariableArrayType(LHS); 5464 const VariableArrayType* RVAT = getAsVariableArrayType(RHS); 5465 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 5466 return LHS; 5467 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 5468 return RHS; 5469 if (LVAT) { 5470 // FIXME: This isn't correct! But tricky to implement because 5471 // the array's size has to be the size of LHS, but the type 5472 // has to be different. 5473 return LHS; 5474 } 5475 if (RVAT) { 5476 // FIXME: This isn't correct! But tricky to implement because 5477 // the array's size has to be the size of RHS, but the type 5478 // has to be different. 5479 return RHS; 5480 } 5481 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS; 5482 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS; 5483 return getIncompleteArrayType(ResultType, 5484 ArrayType::ArraySizeModifier(), 0); 5485 } 5486 case Type::FunctionNoProto: 5487 return mergeFunctionTypes(LHS, RHS, OfBlockPointer, Unqualified); 5488 case Type::Record: 5489 case Type::Enum: 5490 return QualType(); 5491 case Type::Builtin: 5492 // Only exactly equal builtin types are compatible, which is tested above. 5493 return QualType(); 5494 case Type::Complex: 5495 // Distinct complex types are incompatible. 5496 return QualType(); 5497 case Type::Vector: 5498 // FIXME: The merged type should be an ExtVector! 5499 if (areCompatVectorTypes(LHSCan->getAs<VectorType>(), 5500 RHSCan->getAs<VectorType>())) 5501 return LHS; 5502 return QualType(); 5503 case Type::ObjCObject: { 5504 // Check if the types are assignment compatible. 5505 // FIXME: This should be type compatibility, e.g. whether 5506 // "LHS x; RHS x;" at global scope is legal. 5507 const ObjCObjectType* LHSIface = LHS->getAs<ObjCObjectType>(); 5508 const ObjCObjectType* RHSIface = RHS->getAs<ObjCObjectType>(); 5509 if (canAssignObjCInterfaces(LHSIface, RHSIface)) 5510 return LHS; 5511 5512 return QualType(); 5513 } 5514 case Type::ObjCObjectPointer: { 5515 if (OfBlockPointer) { 5516 if (canAssignObjCInterfacesInBlockPointer( 5517 LHS->getAs<ObjCObjectPointerType>(), 5518 RHS->getAs<ObjCObjectPointerType>(), 5519 BlockReturnType)) 5520 return LHS; 5521 return QualType(); 5522 } 5523 if (canAssignObjCInterfaces(LHS->getAs<ObjCObjectPointerType>(), 5524 RHS->getAs<ObjCObjectPointerType>())) 5525 return LHS; 5526 5527 return QualType(); 5528 } 5529 } 5530 5531 return QualType(); 5532} 5533 5534/// mergeObjCGCQualifiers - This routine merges ObjC's GC attribute of 'LHS' and 5535/// 'RHS' attributes and returns the merged version; including for function 5536/// return types. 5537QualType ASTContext::mergeObjCGCQualifiers(QualType LHS, QualType RHS) { 5538 QualType LHSCan = getCanonicalType(LHS), 5539 RHSCan = getCanonicalType(RHS); 5540 // If two types are identical, they are compatible. 5541 if (LHSCan == RHSCan) 5542 return LHS; 5543 if (RHSCan->isFunctionType()) { 5544 if (!LHSCan->isFunctionType()) 5545 return QualType(); 5546 QualType OldReturnType = 5547 cast<FunctionType>(RHSCan.getTypePtr())->getResultType(); 5548 QualType NewReturnType = 5549 cast<FunctionType>(LHSCan.getTypePtr())->getResultType(); 5550 QualType ResReturnType = 5551 mergeObjCGCQualifiers(NewReturnType, OldReturnType); 5552 if (ResReturnType.isNull()) 5553 return QualType(); 5554 if (ResReturnType == NewReturnType || ResReturnType == OldReturnType) { 5555 // id foo(); ... __strong id foo(); or: __strong id foo(); ... id foo(); 5556 // In either case, use OldReturnType to build the new function type. 5557 const FunctionType *F = LHS->getAs<FunctionType>(); 5558 if (const FunctionProtoType *FPT = cast<FunctionProtoType>(F)) { 5559 FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); 5560 EPI.ExtInfo = getFunctionExtInfo(LHS); 5561 QualType ResultType 5562 = getFunctionType(OldReturnType, FPT->arg_type_begin(), 5563 FPT->getNumArgs(), EPI); 5564 return ResultType; 5565 } 5566 } 5567 return QualType(); 5568 } 5569 5570 // If the qualifiers are different, the types can still be merged. 5571 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 5572 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 5573 if (LQuals != RQuals) { 5574 // If any of these qualifiers are different, we have a type mismatch. 5575 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 5576 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 5577 return QualType(); 5578 5579 // Exactly one GC qualifier difference is allowed: __strong is 5580 // okay if the other type has no GC qualifier but is an Objective 5581 // C object pointer (i.e. implicitly strong by default). We fix 5582 // this by pretending that the unqualified type was actually 5583 // qualified __strong. 5584 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 5585 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 5586 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 5587 5588 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 5589 return QualType(); 5590 5591 if (GC_L == Qualifiers::Strong) 5592 return LHS; 5593 if (GC_R == Qualifiers::Strong) 5594 return RHS; 5595 return QualType(); 5596 } 5597 5598 if (LHSCan->isObjCObjectPointerType() && RHSCan->isObjCObjectPointerType()) { 5599 QualType LHSBaseQT = LHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 5600 QualType RHSBaseQT = RHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 5601 QualType ResQT = mergeObjCGCQualifiers(LHSBaseQT, RHSBaseQT); 5602 if (ResQT == LHSBaseQT) 5603 return LHS; 5604 if (ResQT == RHSBaseQT) 5605 return RHS; 5606 } 5607 return QualType(); 5608} 5609 5610//===----------------------------------------------------------------------===// 5611// Integer Predicates 5612//===----------------------------------------------------------------------===// 5613 5614unsigned ASTContext::getIntWidth(QualType T) const { 5615 if (const EnumType *ET = dyn_cast<EnumType>(T)) 5616 T = ET->getDecl()->getIntegerType(); 5617 if (T->isBooleanType()) 5618 return 1; 5619 // For builtin types, just use the standard type sizing method 5620 return (unsigned)getTypeSize(T); 5621} 5622 5623QualType ASTContext::getCorrespondingUnsignedType(QualType T) { 5624 assert(T->hasSignedIntegerRepresentation() && "Unexpected type"); 5625 5626 // Turn <4 x signed int> -> <4 x unsigned int> 5627 if (const VectorType *VTy = T->getAs<VectorType>()) 5628 return getVectorType(getCorrespondingUnsignedType(VTy->getElementType()), 5629 VTy->getNumElements(), VTy->getVectorKind()); 5630 5631 // For enums, we return the unsigned version of the base type. 5632 if (const EnumType *ETy = T->getAs<EnumType>()) 5633 T = ETy->getDecl()->getIntegerType(); 5634 5635 const BuiltinType *BTy = T->getAs<BuiltinType>(); 5636 assert(BTy && "Unexpected signed integer type"); 5637 switch (BTy->getKind()) { 5638 case BuiltinType::Char_S: 5639 case BuiltinType::SChar: 5640 return UnsignedCharTy; 5641 case BuiltinType::Short: 5642 return UnsignedShortTy; 5643 case BuiltinType::Int: 5644 return UnsignedIntTy; 5645 case BuiltinType::Long: 5646 return UnsignedLongTy; 5647 case BuiltinType::LongLong: 5648 return UnsignedLongLongTy; 5649 case BuiltinType::Int128: 5650 return UnsignedInt128Ty; 5651 default: 5652 assert(0 && "Unexpected signed integer type"); 5653 return QualType(); 5654 } 5655} 5656 5657ASTMutationListener::~ASTMutationListener() { } 5658 5659 5660//===----------------------------------------------------------------------===// 5661// Builtin Type Computation 5662//===----------------------------------------------------------------------===// 5663 5664/// DecodeTypeFromStr - This decodes one type descriptor from Str, advancing the 5665/// pointer over the consumed characters. This returns the resultant type. If 5666/// AllowTypeModifiers is false then modifier like * are not parsed, just basic 5667/// types. This allows "v2i*" to be parsed as a pointer to a v2i instead of 5668/// a vector of "i*". 5669/// 5670/// RequiresICE is filled in on return to indicate whether the value is required 5671/// to be an Integer Constant Expression. 5672static QualType DecodeTypeFromStr(const char *&Str, const ASTContext &Context, 5673 ASTContext::GetBuiltinTypeError &Error, 5674 bool &RequiresICE, 5675 bool AllowTypeModifiers) { 5676 // Modifiers. 5677 int HowLong = 0; 5678 bool Signed = false, Unsigned = false; 5679 RequiresICE = false; 5680 5681 // Read the prefixed modifiers first. 5682 bool Done = false; 5683 while (!Done) { 5684 switch (*Str++) { 5685 default: Done = true; --Str; break; 5686 case 'I': 5687 RequiresICE = true; 5688 break; 5689 case 'S': 5690 assert(!Unsigned && "Can't use both 'S' and 'U' modifiers!"); 5691 assert(!Signed && "Can't use 'S' modifier multiple times!"); 5692 Signed = true; 5693 break; 5694 case 'U': 5695 assert(!Signed && "Can't use both 'S' and 'U' modifiers!"); 5696 assert(!Unsigned && "Can't use 'S' modifier multiple times!"); 5697 Unsigned = true; 5698 break; 5699 case 'L': 5700 assert(HowLong <= 2 && "Can't have LLLL modifier"); 5701 ++HowLong; 5702 break; 5703 } 5704 } 5705 5706 QualType Type; 5707 5708 // Read the base type. 5709 switch (*Str++) { 5710 default: assert(0 && "Unknown builtin type letter!"); 5711 case 'v': 5712 assert(HowLong == 0 && !Signed && !Unsigned && 5713 "Bad modifiers used with 'v'!"); 5714 Type = Context.VoidTy; 5715 break; 5716 case 'f': 5717 assert(HowLong == 0 && !Signed && !Unsigned && 5718 "Bad modifiers used with 'f'!"); 5719 Type = Context.FloatTy; 5720 break; 5721 case 'd': 5722 assert(HowLong < 2 && !Signed && !Unsigned && 5723 "Bad modifiers used with 'd'!"); 5724 if (HowLong) 5725 Type = Context.LongDoubleTy; 5726 else 5727 Type = Context.DoubleTy; 5728 break; 5729 case 's': 5730 assert(HowLong == 0 && "Bad modifiers used with 's'!"); 5731 if (Unsigned) 5732 Type = Context.UnsignedShortTy; 5733 else 5734 Type = Context.ShortTy; 5735 break; 5736 case 'i': 5737 if (HowLong == 3) 5738 Type = Unsigned ? Context.UnsignedInt128Ty : Context.Int128Ty; 5739 else if (HowLong == 2) 5740 Type = Unsigned ? Context.UnsignedLongLongTy : Context.LongLongTy; 5741 else if (HowLong == 1) 5742 Type = Unsigned ? Context.UnsignedLongTy : Context.LongTy; 5743 else 5744 Type = Unsigned ? Context.UnsignedIntTy : Context.IntTy; 5745 break; 5746 case 'c': 5747 assert(HowLong == 0 && "Bad modifiers used with 'c'!"); 5748 if (Signed) 5749 Type = Context.SignedCharTy; 5750 else if (Unsigned) 5751 Type = Context.UnsignedCharTy; 5752 else 5753 Type = Context.CharTy; 5754 break; 5755 case 'b': // boolean 5756 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'b'!"); 5757 Type = Context.BoolTy; 5758 break; 5759 case 'z': // size_t. 5760 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'z'!"); 5761 Type = Context.getSizeType(); 5762 break; 5763 case 'F': 5764 Type = Context.getCFConstantStringType(); 5765 break; 5766 case 'G': 5767 Type = Context.getObjCIdType(); 5768 break; 5769 case 'H': 5770 Type = Context.getObjCSelType(); 5771 break; 5772 case 'a': 5773 Type = Context.getBuiltinVaListType(); 5774 assert(!Type.isNull() && "builtin va list type not initialized!"); 5775 break; 5776 case 'A': 5777 // This is a "reference" to a va_list; however, what exactly 5778 // this means depends on how va_list is defined. There are two 5779 // different kinds of va_list: ones passed by value, and ones 5780 // passed by reference. An example of a by-value va_list is 5781 // x86, where va_list is a char*. An example of by-ref va_list 5782 // is x86-64, where va_list is a __va_list_tag[1]. For x86, 5783 // we want this argument to be a char*&; for x86-64, we want 5784 // it to be a __va_list_tag*. 5785 Type = Context.getBuiltinVaListType(); 5786 assert(!Type.isNull() && "builtin va list type not initialized!"); 5787 if (Type->isArrayType()) 5788 Type = Context.getArrayDecayedType(Type); 5789 else 5790 Type = Context.getLValueReferenceType(Type); 5791 break; 5792 case 'V': { 5793 char *End; 5794 unsigned NumElements = strtoul(Str, &End, 10); 5795 assert(End != Str && "Missing vector size"); 5796 Str = End; 5797 5798 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, 5799 RequiresICE, false); 5800 assert(!RequiresICE && "Can't require vector ICE"); 5801 5802 // TODO: No way to make AltiVec vectors in builtins yet. 5803 Type = Context.getVectorType(ElementType, NumElements, 5804 VectorType::GenericVector); 5805 break; 5806 } 5807 case 'X': { 5808 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, RequiresICE, 5809 false); 5810 assert(!RequiresICE && "Can't require complex ICE"); 5811 Type = Context.getComplexType(ElementType); 5812 break; 5813 } 5814 case 'P': 5815 Type = Context.getFILEType(); 5816 if (Type.isNull()) { 5817 Error = ASTContext::GE_Missing_stdio; 5818 return QualType(); 5819 } 5820 break; 5821 case 'J': 5822 if (Signed) 5823 Type = Context.getsigjmp_bufType(); 5824 else 5825 Type = Context.getjmp_bufType(); 5826 5827 if (Type.isNull()) { 5828 Error = ASTContext::GE_Missing_setjmp; 5829 return QualType(); 5830 } 5831 break; 5832 } 5833 5834 // If there are modifiers and if we're allowed to parse them, go for it. 5835 Done = !AllowTypeModifiers; 5836 while (!Done) { 5837 switch (char c = *Str++) { 5838 default: Done = true; --Str; break; 5839 case '*': 5840 case '&': { 5841 // Both pointers and references can have their pointee types 5842 // qualified with an address space. 5843 char *End; 5844 unsigned AddrSpace = strtoul(Str, &End, 10); 5845 if (End != Str && AddrSpace != 0) { 5846 Type = Context.getAddrSpaceQualType(Type, AddrSpace); 5847 Str = End; 5848 } 5849 if (c == '*') 5850 Type = Context.getPointerType(Type); 5851 else 5852 Type = Context.getLValueReferenceType(Type); 5853 break; 5854 } 5855 // FIXME: There's no way to have a built-in with an rvalue ref arg. 5856 case 'C': 5857 Type = Type.withConst(); 5858 break; 5859 case 'D': 5860 Type = Context.getVolatileType(Type); 5861 break; 5862 } 5863 } 5864 5865 assert((!RequiresICE || Type->isIntegralOrEnumerationType()) && 5866 "Integer constant 'I' type must be an integer"); 5867 5868 return Type; 5869} 5870 5871/// GetBuiltinType - Return the type for the specified builtin. 5872QualType ASTContext::GetBuiltinType(unsigned Id, 5873 GetBuiltinTypeError &Error, 5874 unsigned *IntegerConstantArgs) const { 5875 const char *TypeStr = BuiltinInfo.GetTypeString(Id); 5876 5877 llvm::SmallVector<QualType, 8> ArgTypes; 5878 5879 bool RequiresICE = false; 5880 Error = GE_None; 5881 QualType ResType = DecodeTypeFromStr(TypeStr, *this, Error, 5882 RequiresICE, true); 5883 if (Error != GE_None) 5884 return QualType(); 5885 5886 assert(!RequiresICE && "Result of intrinsic cannot be required to be an ICE"); 5887 5888 while (TypeStr[0] && TypeStr[0] != '.') { 5889 QualType Ty = DecodeTypeFromStr(TypeStr, *this, Error, RequiresICE, true); 5890 if (Error != GE_None) 5891 return QualType(); 5892 5893 // If this argument is required to be an IntegerConstantExpression and the 5894 // caller cares, fill in the bitmask we return. 5895 if (RequiresICE && IntegerConstantArgs) 5896 *IntegerConstantArgs |= 1 << ArgTypes.size(); 5897 5898 // Do array -> pointer decay. The builtin should use the decayed type. 5899 if (Ty->isArrayType()) 5900 Ty = getArrayDecayedType(Ty); 5901 5902 ArgTypes.push_back(Ty); 5903 } 5904 5905 assert((TypeStr[0] != '.' || TypeStr[1] == 0) && 5906 "'.' should only occur at end of builtin type list!"); 5907 5908 FunctionType::ExtInfo EI; 5909 if (BuiltinInfo.isNoReturn(Id)) EI = EI.withNoReturn(true); 5910 5911 bool Variadic = (TypeStr[0] == '.'); 5912 5913 // We really shouldn't be making a no-proto type here, especially in C++. 5914 if (ArgTypes.empty() && Variadic) 5915 return getFunctionNoProtoType(ResType, EI); 5916 5917 FunctionProtoType::ExtProtoInfo EPI; 5918 EPI.ExtInfo = EI; 5919 EPI.Variadic = Variadic; 5920 5921 return getFunctionType(ResType, ArgTypes.data(), ArgTypes.size(), EPI); 5922} 5923 5924GVALinkage ASTContext::GetGVALinkageForFunction(const FunctionDecl *FD) { 5925 GVALinkage External = GVA_StrongExternal; 5926 5927 Linkage L = FD->getLinkage(); 5928 switch (L) { 5929 case NoLinkage: 5930 case InternalLinkage: 5931 case UniqueExternalLinkage: 5932 return GVA_Internal; 5933 5934 case ExternalLinkage: 5935 switch (FD->getTemplateSpecializationKind()) { 5936 case TSK_Undeclared: 5937 case TSK_ExplicitSpecialization: 5938 External = GVA_StrongExternal; 5939 break; 5940 5941 case TSK_ExplicitInstantiationDefinition: 5942 return GVA_ExplicitTemplateInstantiation; 5943 5944 case TSK_ExplicitInstantiationDeclaration: 5945 case TSK_ImplicitInstantiation: 5946 External = GVA_TemplateInstantiation; 5947 break; 5948 } 5949 } 5950 5951 if (!FD->isInlined()) 5952 return External; 5953 5954 if (!getLangOptions().CPlusPlus || FD->hasAttr<GNUInlineAttr>()) { 5955 // GNU or C99 inline semantics. Determine whether this symbol should be 5956 // externally visible. 5957 if (FD->isInlineDefinitionExternallyVisible()) 5958 return External; 5959 5960 // C99 inline semantics, where the symbol is not externally visible. 5961 return GVA_C99Inline; 5962 } 5963 5964 // C++0x [temp.explicit]p9: 5965 // [ Note: The intent is that an inline function that is the subject of 5966 // an explicit instantiation declaration will still be implicitly 5967 // instantiated when used so that the body can be considered for 5968 // inlining, but that no out-of-line copy of the inline function would be 5969 // generated in the translation unit. -- end note ] 5970 if (FD->getTemplateSpecializationKind() 5971 == TSK_ExplicitInstantiationDeclaration) 5972 return GVA_C99Inline; 5973 5974 return GVA_CXXInline; 5975} 5976 5977GVALinkage ASTContext::GetGVALinkageForVariable(const VarDecl *VD) { 5978 // If this is a static data member, compute the kind of template 5979 // specialization. Otherwise, this variable is not part of a 5980 // template. 5981 TemplateSpecializationKind TSK = TSK_Undeclared; 5982 if (VD->isStaticDataMember()) 5983 TSK = VD->getTemplateSpecializationKind(); 5984 5985 Linkage L = VD->getLinkage(); 5986 if (L == ExternalLinkage && getLangOptions().CPlusPlus && 5987 VD->getType()->getLinkage() == UniqueExternalLinkage) 5988 L = UniqueExternalLinkage; 5989 5990 switch (L) { 5991 case NoLinkage: 5992 case InternalLinkage: 5993 case UniqueExternalLinkage: 5994 return GVA_Internal; 5995 5996 case ExternalLinkage: 5997 switch (TSK) { 5998 case TSK_Undeclared: 5999 case TSK_ExplicitSpecialization: 6000 return GVA_StrongExternal; 6001 6002 case TSK_ExplicitInstantiationDeclaration: 6003 llvm_unreachable("Variable should not be instantiated"); 6004 // Fall through to treat this like any other instantiation. 6005 6006 case TSK_ExplicitInstantiationDefinition: 6007 return GVA_ExplicitTemplateInstantiation; 6008 6009 case TSK_ImplicitInstantiation: 6010 return GVA_TemplateInstantiation; 6011 } 6012 } 6013 6014 return GVA_StrongExternal; 6015} 6016 6017bool ASTContext::DeclMustBeEmitted(const Decl *D) { 6018 if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { 6019 if (!VD->isFileVarDecl()) 6020 return false; 6021 } else if (!isa<FunctionDecl>(D)) 6022 return false; 6023 6024 // Weak references don't produce any output by themselves. 6025 if (D->hasAttr<WeakRefAttr>()) 6026 return false; 6027 6028 // Aliases and used decls are required. 6029 if (D->hasAttr<AliasAttr>() || D->hasAttr<UsedAttr>()) 6030 return true; 6031 6032 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 6033 // Forward declarations aren't required. 6034 if (!FD->isThisDeclarationADefinition()) 6035 return false; 6036 6037 // Constructors and destructors are required. 6038 if (FD->hasAttr<ConstructorAttr>() || FD->hasAttr<DestructorAttr>()) 6039 return true; 6040 6041 // The key function for a class is required. 6042 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { 6043 const CXXRecordDecl *RD = MD->getParent(); 6044 if (MD->isOutOfLine() && RD->isDynamicClass()) { 6045 const CXXMethodDecl *KeyFunc = getKeyFunction(RD); 6046 if (KeyFunc && KeyFunc->getCanonicalDecl() == MD->getCanonicalDecl()) 6047 return true; 6048 } 6049 } 6050 6051 GVALinkage Linkage = GetGVALinkageForFunction(FD); 6052 6053 // static, static inline, always_inline, and extern inline functions can 6054 // always be deferred. Normal inline functions can be deferred in C99/C++. 6055 // Implicit template instantiations can also be deferred in C++. 6056 if (Linkage == GVA_Internal || Linkage == GVA_C99Inline || 6057 Linkage == GVA_CXXInline || Linkage == GVA_TemplateInstantiation) 6058 return false; 6059 return true; 6060 } 6061 6062 const VarDecl *VD = cast<VarDecl>(D); 6063 assert(VD->isFileVarDecl() && "Expected file scoped var"); 6064 6065 if (VD->isThisDeclarationADefinition() == VarDecl::DeclarationOnly) 6066 return false; 6067 6068 // Structs that have non-trivial constructors or destructors are required. 6069 6070 // FIXME: Handle references. 6071 if (const RecordType *RT = VD->getType()->getAs<RecordType>()) { 6072 if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(RT->getDecl())) { 6073 if (RD->hasDefinition() && 6074 (!RD->hasTrivialConstructor() || !RD->hasTrivialDestructor())) 6075 return true; 6076 } 6077 } 6078 6079 GVALinkage L = GetGVALinkageForVariable(VD); 6080 if (L == GVA_Internal || L == GVA_TemplateInstantiation) { 6081 if (!(VD->getInit() && VD->getInit()->HasSideEffects(*this))) 6082 return false; 6083 } 6084 6085 return true; 6086} 6087 6088CallingConv ASTContext::getDefaultMethodCallConv() { 6089 // Pass through to the C++ ABI object 6090 return ABI->getDefaultMethodCallConv(); 6091} 6092 6093bool ASTContext::isNearlyEmpty(const CXXRecordDecl *RD) const { 6094 // Pass through to the C++ ABI object 6095 return ABI->isNearlyEmpty(RD); 6096} 6097 6098MangleContext *ASTContext::createMangleContext() { 6099 switch (Target.getCXXABI()) { 6100 case CXXABI_ARM: 6101 case CXXABI_Itanium: 6102 return createItaniumMangleContext(*this, getDiagnostics()); 6103 case CXXABI_Microsoft: 6104 return createMicrosoftMangleContext(*this, getDiagnostics()); 6105 } 6106 assert(0 && "Unsupported ABI"); 6107 return 0; 6108} 6109 6110CXXABI::~CXXABI() {} 6111