ASTContext.cpp revision 231da7eb3dd13007e5e40fffe48998e5ef284e06
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/Basic/Builtins.h" 26#include "clang/Basic/SourceManager.h" 27#include "clang/Basic/TargetInfo.h" 28#include "llvm/ADT/SmallString.h" 29#include "llvm/ADT/StringExtras.h" 30#include "llvm/Support/MathExtras.h" 31#include "llvm/Support/raw_ostream.h" 32#include "CXXABI.h" 33 34using namespace clang; 35 36unsigned ASTContext::NumImplicitDefaultConstructors; 37unsigned ASTContext::NumImplicitDefaultConstructorsDeclared; 38unsigned ASTContext::NumImplicitCopyConstructors; 39unsigned ASTContext::NumImplicitCopyConstructorsDeclared; 40unsigned ASTContext::NumImplicitCopyAssignmentOperators; 41unsigned ASTContext::NumImplicitCopyAssignmentOperatorsDeclared; 42unsigned ASTContext::NumImplicitDestructors; 43unsigned ASTContext::NumImplicitDestructorsDeclared; 44 45enum FloatingRank { 46 FloatRank, DoubleRank, LongDoubleRank 47}; 48 49void 50ASTContext::CanonicalTemplateTemplateParm::Profile(llvm::FoldingSetNodeID &ID, 51 TemplateTemplateParmDecl *Parm) { 52 ID.AddInteger(Parm->getDepth()); 53 ID.AddInteger(Parm->getPosition()); 54 // FIXME: Parameter pack 55 56 TemplateParameterList *Params = Parm->getTemplateParameters(); 57 ID.AddInteger(Params->size()); 58 for (TemplateParameterList::const_iterator P = Params->begin(), 59 PEnd = Params->end(); 60 P != PEnd; ++P) { 61 if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*P)) { 62 ID.AddInteger(0); 63 ID.AddBoolean(TTP->isParameterPack()); 64 continue; 65 } 66 67 if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(*P)) { 68 ID.AddInteger(1); 69 // FIXME: Parameter pack 70 ID.AddPointer(NTTP->getType().getAsOpaquePtr()); 71 continue; 72 } 73 74 TemplateTemplateParmDecl *TTP = cast<TemplateTemplateParmDecl>(*P); 75 ID.AddInteger(2); 76 Profile(ID, TTP); 77 } 78} 79 80TemplateTemplateParmDecl * 81ASTContext::getCanonicalTemplateTemplateParmDecl( 82 TemplateTemplateParmDecl *TTP) { 83 // Check if we already have a canonical template template parameter. 84 llvm::FoldingSetNodeID ID; 85 CanonicalTemplateTemplateParm::Profile(ID, TTP); 86 void *InsertPos = 0; 87 CanonicalTemplateTemplateParm *Canonical 88 = CanonTemplateTemplateParms.FindNodeOrInsertPos(ID, InsertPos); 89 if (Canonical) 90 return Canonical->getParam(); 91 92 // Build a canonical template parameter list. 93 TemplateParameterList *Params = TTP->getTemplateParameters(); 94 llvm::SmallVector<NamedDecl *, 4> CanonParams; 95 CanonParams.reserve(Params->size()); 96 for (TemplateParameterList::const_iterator P = Params->begin(), 97 PEnd = Params->end(); 98 P != PEnd; ++P) { 99 if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*P)) 100 CanonParams.push_back( 101 TemplateTypeParmDecl::Create(*this, getTranslationUnitDecl(), 102 SourceLocation(), TTP->getDepth(), 103 TTP->getIndex(), 0, false, 104 TTP->isParameterPack())); 105 else if (NonTypeTemplateParmDecl *NTTP 106 = dyn_cast<NonTypeTemplateParmDecl>(*P)) 107 CanonParams.push_back( 108 NonTypeTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 109 SourceLocation(), NTTP->getDepth(), 110 NTTP->getPosition(), 0, 111 getCanonicalType(NTTP->getType()), 112 0)); 113 else 114 CanonParams.push_back(getCanonicalTemplateTemplateParmDecl( 115 cast<TemplateTemplateParmDecl>(*P))); 116 } 117 118 TemplateTemplateParmDecl *CanonTTP 119 = TemplateTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 120 SourceLocation(), TTP->getDepth(), 121 TTP->getPosition(), 0, 122 TemplateParameterList::Create(*this, SourceLocation(), 123 SourceLocation(), 124 CanonParams.data(), 125 CanonParams.size(), 126 SourceLocation())); 127 128 // Get the new insert position for the node we care about. 129 Canonical = CanonTemplateTemplateParms.FindNodeOrInsertPos(ID, InsertPos); 130 assert(Canonical == 0 && "Shouldn't be in the map!"); 131 (void)Canonical; 132 133 // Create the canonical template template parameter entry. 134 Canonical = new (*this) CanonicalTemplateTemplateParm(CanonTTP); 135 CanonTemplateTemplateParms.InsertNode(Canonical, InsertPos); 136 return CanonTTP; 137} 138 139CXXABI *ASTContext::createCXXABI(const TargetInfo &T) { 140 if (!LangOpts.CPlusPlus) return 0; 141 142 switch (T.getCXXABI()) { 143 case CXXABI_ARM: 144 return CreateARMCXXABI(*this); 145 case CXXABI_Itanium: 146 return CreateItaniumCXXABI(*this); 147 case CXXABI_Microsoft: 148 return CreateMicrosoftCXXABI(*this); 149 } 150 return 0; 151} 152 153ASTContext::ASTContext(const LangOptions& LOpts, SourceManager &SM, 154 const TargetInfo &t, 155 IdentifierTable &idents, SelectorTable &sels, 156 Builtin::Context &builtins, 157 unsigned size_reserve) : 158 TemplateSpecializationTypes(this_()), 159 DependentTemplateSpecializationTypes(this_()), 160 GlobalNestedNameSpecifier(0), IsInt128Installed(false), 161 CFConstantStringTypeDecl(0), NSConstantStringTypeDecl(0), 162 ObjCFastEnumerationStateTypeDecl(0), FILEDecl(0), jmp_bufDecl(0), 163 sigjmp_bufDecl(0), BlockDescriptorType(0), BlockDescriptorExtendedType(0), 164 NullTypeSourceInfo(QualType()), 165 SourceMgr(SM), LangOpts(LOpts), ABI(createCXXABI(t)), Target(t), 166 Idents(idents), Selectors(sels), 167 BuiltinInfo(builtins), 168 DeclarationNames(*this), 169 ExternalSource(0), Listener(0), PrintingPolicy(LOpts), 170 LastSDM(0, 0), 171 UniqueBlockByRefTypeID(0), UniqueBlockParmTypeID(0) { 172 ObjCIdRedefinitionType = QualType(); 173 ObjCClassRedefinitionType = QualType(); 174 ObjCSelRedefinitionType = QualType(); 175 if (size_reserve > 0) Types.reserve(size_reserve); 176 TUDecl = TranslationUnitDecl::Create(*this); 177 InitBuiltinTypes(); 178} 179 180ASTContext::~ASTContext() { 181 // Release the DenseMaps associated with DeclContext objects. 182 // FIXME: Is this the ideal solution? 183 ReleaseDeclContextMaps(); 184 185 // Call all of the deallocation functions. 186 for (unsigned I = 0, N = Deallocations.size(); I != N; ++I) 187 Deallocations[I].first(Deallocations[I].second); 188 189 // Release all of the memory associated with overridden C++ methods. 190 for (llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::iterator 191 OM = OverriddenMethods.begin(), OMEnd = OverriddenMethods.end(); 192 OM != OMEnd; ++OM) 193 OM->second.Destroy(); 194 195 // ASTRecordLayout objects in ASTRecordLayouts must always be destroyed 196 // because they can contain DenseMaps. 197 for (llvm::DenseMap<const ObjCContainerDecl*, 198 const ASTRecordLayout*>::iterator 199 I = ObjCLayouts.begin(), E = ObjCLayouts.end(); I != E; ) 200 // Increment in loop to prevent using deallocated memory. 201 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 202 R->Destroy(*this); 203 204 for (llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*>::iterator 205 I = ASTRecordLayouts.begin(), E = ASTRecordLayouts.end(); I != E; ) { 206 // Increment in loop to prevent using deallocated memory. 207 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 208 R->Destroy(*this); 209 } 210 211 for (llvm::DenseMap<const Decl*, AttrVec*>::iterator A = DeclAttrs.begin(), 212 AEnd = DeclAttrs.end(); 213 A != AEnd; ++A) 214 A->second->~AttrVec(); 215} 216 217void ASTContext::AddDeallocation(void (*Callback)(void*), void *Data) { 218 Deallocations.push_back(std::make_pair(Callback, Data)); 219} 220 221void 222ASTContext::setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source) { 223 ExternalSource.reset(Source.take()); 224} 225 226void ASTContext::PrintStats() const { 227 fprintf(stderr, "*** AST Context Stats:\n"); 228 fprintf(stderr, " %d types total.\n", (int)Types.size()); 229 230 unsigned counts[] = { 231#define TYPE(Name, Parent) 0, 232#define ABSTRACT_TYPE(Name, Parent) 233#include "clang/AST/TypeNodes.def" 234 0 // Extra 235 }; 236 237 for (unsigned i = 0, e = Types.size(); i != e; ++i) { 238 Type *T = Types[i]; 239 counts[(unsigned)T->getTypeClass()]++; 240 } 241 242 unsigned Idx = 0; 243 unsigned TotalBytes = 0; 244#define TYPE(Name, Parent) \ 245 if (counts[Idx]) \ 246 fprintf(stderr, " %d %s types\n", (int)counts[Idx], #Name); \ 247 TotalBytes += counts[Idx] * sizeof(Name##Type); \ 248 ++Idx; 249#define ABSTRACT_TYPE(Name, Parent) 250#include "clang/AST/TypeNodes.def" 251 252 fprintf(stderr, "Total bytes = %d\n", int(TotalBytes)); 253 254 // Implicit special member functions. 255 fprintf(stderr, " %u/%u implicit default constructors created\n", 256 NumImplicitDefaultConstructorsDeclared, 257 NumImplicitDefaultConstructors); 258 fprintf(stderr, " %u/%u implicit copy constructors created\n", 259 NumImplicitCopyConstructorsDeclared, 260 NumImplicitCopyConstructors); 261 fprintf(stderr, " %u/%u implicit copy assignment operators created\n", 262 NumImplicitCopyAssignmentOperatorsDeclared, 263 NumImplicitCopyAssignmentOperators); 264 fprintf(stderr, " %u/%u implicit destructors created\n", 265 NumImplicitDestructorsDeclared, NumImplicitDestructors); 266 267 if (ExternalSource.get()) { 268 fprintf(stderr, "\n"); 269 ExternalSource->PrintStats(); 270 } 271 272 BumpAlloc.PrintStats(); 273} 274 275 276void ASTContext::InitBuiltinType(CanQualType &R, BuiltinType::Kind K) { 277 BuiltinType *Ty = new (*this, TypeAlignment) BuiltinType(K); 278 R = CanQualType::CreateUnsafe(QualType(Ty, 0)); 279 Types.push_back(Ty); 280} 281 282void ASTContext::InitBuiltinTypes() { 283 assert(VoidTy.isNull() && "Context reinitialized?"); 284 285 // C99 6.2.5p19. 286 InitBuiltinType(VoidTy, BuiltinType::Void); 287 288 // C99 6.2.5p2. 289 InitBuiltinType(BoolTy, BuiltinType::Bool); 290 // C99 6.2.5p3. 291 if (LangOpts.CharIsSigned) 292 InitBuiltinType(CharTy, BuiltinType::Char_S); 293 else 294 InitBuiltinType(CharTy, BuiltinType::Char_U); 295 // C99 6.2.5p4. 296 InitBuiltinType(SignedCharTy, BuiltinType::SChar); 297 InitBuiltinType(ShortTy, BuiltinType::Short); 298 InitBuiltinType(IntTy, BuiltinType::Int); 299 InitBuiltinType(LongTy, BuiltinType::Long); 300 InitBuiltinType(LongLongTy, BuiltinType::LongLong); 301 302 // C99 6.2.5p6. 303 InitBuiltinType(UnsignedCharTy, BuiltinType::UChar); 304 InitBuiltinType(UnsignedShortTy, BuiltinType::UShort); 305 InitBuiltinType(UnsignedIntTy, BuiltinType::UInt); 306 InitBuiltinType(UnsignedLongTy, BuiltinType::ULong); 307 InitBuiltinType(UnsignedLongLongTy, BuiltinType::ULongLong); 308 309 // C99 6.2.5p10. 310 InitBuiltinType(FloatTy, BuiltinType::Float); 311 InitBuiltinType(DoubleTy, BuiltinType::Double); 312 InitBuiltinType(LongDoubleTy, BuiltinType::LongDouble); 313 314 // GNU extension, 128-bit integers. 315 InitBuiltinType(Int128Ty, BuiltinType::Int128); 316 InitBuiltinType(UnsignedInt128Ty, BuiltinType::UInt128); 317 318 if (LangOpts.CPlusPlus) // C++ 3.9.1p5 319 InitBuiltinType(WCharTy, BuiltinType::WChar); 320 else // C99 321 WCharTy = getFromTargetType(Target.getWCharType()); 322 323 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 324 InitBuiltinType(Char16Ty, BuiltinType::Char16); 325 else // C99 326 Char16Ty = getFromTargetType(Target.getChar16Type()); 327 328 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 329 InitBuiltinType(Char32Ty, BuiltinType::Char32); 330 else // C99 331 Char32Ty = getFromTargetType(Target.getChar32Type()); 332 333 // Placeholder type for type-dependent expressions whose type is 334 // completely unknown. No code should ever check a type against 335 // DependentTy and users should never see it; however, it is here to 336 // help diagnose failures to properly check for type-dependent 337 // expressions. 338 InitBuiltinType(DependentTy, BuiltinType::Dependent); 339 340 // Placeholder type for functions. 341 InitBuiltinType(OverloadTy, BuiltinType::Overload); 342 343 // Placeholder type for C++0x auto declarations whose real type has 344 // not yet been deduced. 345 InitBuiltinType(UndeducedAutoTy, BuiltinType::UndeducedAuto); 346 347 // C99 6.2.5p11. 348 FloatComplexTy = getComplexType(FloatTy); 349 DoubleComplexTy = getComplexType(DoubleTy); 350 LongDoubleComplexTy = getComplexType(LongDoubleTy); 351 352 BuiltinVaListType = QualType(); 353 354 // "Builtin" typedefs set by Sema::ActOnTranslationUnitScope(). 355 ObjCIdTypedefType = QualType(); 356 ObjCClassTypedefType = QualType(); 357 ObjCSelTypedefType = QualType(); 358 359 // Builtin types for 'id', 'Class', and 'SEL'. 360 InitBuiltinType(ObjCBuiltinIdTy, BuiltinType::ObjCId); 361 InitBuiltinType(ObjCBuiltinClassTy, BuiltinType::ObjCClass); 362 InitBuiltinType(ObjCBuiltinSelTy, BuiltinType::ObjCSel); 363 364 ObjCConstantStringType = QualType(); 365 366 // void * type 367 VoidPtrTy = getPointerType(VoidTy); 368 369 // nullptr type (C++0x 2.14.7) 370 InitBuiltinType(NullPtrTy, BuiltinType::NullPtr); 371} 372 373Diagnostic &ASTContext::getDiagnostics() const { 374 return SourceMgr.getDiagnostics(); 375} 376 377AttrVec& ASTContext::getDeclAttrs(const Decl *D) { 378 AttrVec *&Result = DeclAttrs[D]; 379 if (!Result) { 380 void *Mem = Allocate(sizeof(AttrVec)); 381 Result = new (Mem) AttrVec; 382 } 383 384 return *Result; 385} 386 387/// \brief Erase the attributes corresponding to the given declaration. 388void ASTContext::eraseDeclAttrs(const Decl *D) { 389 llvm::DenseMap<const Decl*, AttrVec*>::iterator Pos = DeclAttrs.find(D); 390 if (Pos != DeclAttrs.end()) { 391 Pos->second->~AttrVec(); 392 DeclAttrs.erase(Pos); 393 } 394} 395 396 397MemberSpecializationInfo * 398ASTContext::getInstantiatedFromStaticDataMember(const VarDecl *Var) { 399 assert(Var->isStaticDataMember() && "Not a static data member"); 400 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *>::iterator Pos 401 = InstantiatedFromStaticDataMember.find(Var); 402 if (Pos == InstantiatedFromStaticDataMember.end()) 403 return 0; 404 405 return Pos->second; 406} 407 408void 409ASTContext::setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 410 TemplateSpecializationKind TSK, 411 SourceLocation PointOfInstantiation) { 412 assert(Inst->isStaticDataMember() && "Not a static data member"); 413 assert(Tmpl->isStaticDataMember() && "Not a static data member"); 414 assert(!InstantiatedFromStaticDataMember[Inst] && 415 "Already noted what static data member was instantiated from"); 416 InstantiatedFromStaticDataMember[Inst] 417 = new (*this) MemberSpecializationInfo(Tmpl, TSK, PointOfInstantiation); 418} 419 420NamedDecl * 421ASTContext::getInstantiatedFromUsingDecl(UsingDecl *UUD) { 422 llvm::DenseMap<UsingDecl *, NamedDecl *>::const_iterator Pos 423 = InstantiatedFromUsingDecl.find(UUD); 424 if (Pos == InstantiatedFromUsingDecl.end()) 425 return 0; 426 427 return Pos->second; 428} 429 430void 431ASTContext::setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern) { 432 assert((isa<UsingDecl>(Pattern) || 433 isa<UnresolvedUsingValueDecl>(Pattern) || 434 isa<UnresolvedUsingTypenameDecl>(Pattern)) && 435 "pattern decl is not a using decl"); 436 assert(!InstantiatedFromUsingDecl[Inst] && "pattern already exists"); 437 InstantiatedFromUsingDecl[Inst] = Pattern; 438} 439 440UsingShadowDecl * 441ASTContext::getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst) { 442 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*>::const_iterator Pos 443 = InstantiatedFromUsingShadowDecl.find(Inst); 444 if (Pos == InstantiatedFromUsingShadowDecl.end()) 445 return 0; 446 447 return Pos->second; 448} 449 450void 451ASTContext::setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 452 UsingShadowDecl *Pattern) { 453 assert(!InstantiatedFromUsingShadowDecl[Inst] && "pattern already exists"); 454 InstantiatedFromUsingShadowDecl[Inst] = Pattern; 455} 456 457FieldDecl *ASTContext::getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field) { 458 llvm::DenseMap<FieldDecl *, FieldDecl *>::iterator Pos 459 = InstantiatedFromUnnamedFieldDecl.find(Field); 460 if (Pos == InstantiatedFromUnnamedFieldDecl.end()) 461 return 0; 462 463 return Pos->second; 464} 465 466void ASTContext::setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, 467 FieldDecl *Tmpl) { 468 assert(!Inst->getDeclName() && "Instantiated field decl is not unnamed"); 469 assert(!Tmpl->getDeclName() && "Template field decl is not unnamed"); 470 assert(!InstantiatedFromUnnamedFieldDecl[Inst] && 471 "Already noted what unnamed field was instantiated from"); 472 473 InstantiatedFromUnnamedFieldDecl[Inst] = Tmpl; 474} 475 476ASTContext::overridden_cxx_method_iterator 477ASTContext::overridden_methods_begin(const CXXMethodDecl *Method) const { 478 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 479 = OverriddenMethods.find(Method); 480 if (Pos == OverriddenMethods.end()) 481 return 0; 482 483 return Pos->second.begin(); 484} 485 486ASTContext::overridden_cxx_method_iterator 487ASTContext::overridden_methods_end(const CXXMethodDecl *Method) const { 488 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 489 = OverriddenMethods.find(Method); 490 if (Pos == OverriddenMethods.end()) 491 return 0; 492 493 return Pos->second.end(); 494} 495 496unsigned 497ASTContext::overridden_methods_size(const CXXMethodDecl *Method) const { 498 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 499 = OverriddenMethods.find(Method); 500 if (Pos == OverriddenMethods.end()) 501 return 0; 502 503 return Pos->second.size(); 504} 505 506void ASTContext::addOverriddenMethod(const CXXMethodDecl *Method, 507 const CXXMethodDecl *Overridden) { 508 OverriddenMethods[Method].push_back(Overridden); 509} 510 511//===----------------------------------------------------------------------===// 512// Type Sizing and Analysis 513//===----------------------------------------------------------------------===// 514 515/// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 516/// scalar floating point type. 517const llvm::fltSemantics &ASTContext::getFloatTypeSemantics(QualType T) const { 518 const BuiltinType *BT = T->getAs<BuiltinType>(); 519 assert(BT && "Not a floating point type!"); 520 switch (BT->getKind()) { 521 default: assert(0 && "Not a floating point type!"); 522 case BuiltinType::Float: return Target.getFloatFormat(); 523 case BuiltinType::Double: return Target.getDoubleFormat(); 524 case BuiltinType::LongDouble: return Target.getLongDoubleFormat(); 525 } 526} 527 528/// getDeclAlign - Return a conservative estimate of the alignment of the 529/// specified decl. Note that bitfields do not have a valid alignment, so 530/// this method will assert on them. 531/// If @p RefAsPointee, references are treated like their underlying type 532/// (for alignof), else they're treated like pointers (for CodeGen). 533CharUnits ASTContext::getDeclAlign(const Decl *D, bool RefAsPointee) { 534 unsigned Align = Target.getCharWidth(); 535 536 bool UseAlignAttrOnly = false; 537 if (unsigned AlignFromAttr = D->getMaxAlignment()) { 538 Align = AlignFromAttr; 539 540 // __attribute__((aligned)) can increase or decrease alignment 541 // *except* on a struct or struct member, where it only increases 542 // alignment unless 'packed' is also specified. 543 // 544 // It is an error for [[align]] to decrease alignment, so we can 545 // ignore that possibility; Sema should diagnose it. 546 if (isa<FieldDecl>(D)) { 547 UseAlignAttrOnly = D->hasAttr<PackedAttr>() || 548 cast<FieldDecl>(D)->getParent()->hasAttr<PackedAttr>(); 549 } else { 550 UseAlignAttrOnly = true; 551 } 552 } 553 554 if (UseAlignAttrOnly) { 555 // ignore type of value 556 } else if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) { 557 QualType T = VD->getType(); 558 if (const ReferenceType* RT = T->getAs<ReferenceType>()) { 559 if (RefAsPointee) 560 T = RT->getPointeeType(); 561 else 562 T = getPointerType(RT->getPointeeType()); 563 } 564 if (!T->isIncompleteType() && !T->isFunctionType()) { 565 unsigned MinWidth = Target.getLargeArrayMinWidth(); 566 unsigned ArrayAlign = Target.getLargeArrayAlign(); 567 if (isa<VariableArrayType>(T) && MinWidth != 0) 568 Align = std::max(Align, ArrayAlign); 569 if (ConstantArrayType *CT = dyn_cast<ConstantArrayType>(T)) { 570 unsigned Size = getTypeSize(CT); 571 if (MinWidth != 0 && MinWidth <= Size) 572 Align = std::max(Align, ArrayAlign); 573 } 574 // Incomplete or function types default to 1. 575 while (isa<VariableArrayType>(T) || isa<IncompleteArrayType>(T)) 576 T = cast<ArrayType>(T)->getElementType(); 577 578 Align = std::max(Align, getPreferredTypeAlign(T.getTypePtr())); 579 } 580 if (const FieldDecl *FD = dyn_cast<FieldDecl>(VD)) { 581 // In the case of a field in a packed struct, we want the minimum 582 // of the alignment of the field and the alignment of the struct. 583 Align = std::min(Align, 584 getPreferredTypeAlign(FD->getParent()->getTypeForDecl())); 585 } 586 } 587 588 return CharUnits::fromQuantity(Align / Target.getCharWidth()); 589} 590 591std::pair<CharUnits, CharUnits> 592ASTContext::getTypeInfoInChars(const Type *T) { 593 std::pair<uint64_t, unsigned> Info = getTypeInfo(T); 594 return std::make_pair(CharUnits::fromQuantity(Info.first / getCharWidth()), 595 CharUnits::fromQuantity(Info.second / getCharWidth())); 596} 597 598std::pair<CharUnits, CharUnits> 599ASTContext::getTypeInfoInChars(QualType T) { 600 return getTypeInfoInChars(T.getTypePtr()); 601} 602 603/// getTypeSize - Return the size of the specified type, in bits. This method 604/// does not work on incomplete types. 605/// 606/// FIXME: Pointers into different addr spaces could have different sizes and 607/// alignment requirements: getPointerInfo should take an AddrSpace, this 608/// should take a QualType, &c. 609std::pair<uint64_t, unsigned> 610ASTContext::getTypeInfo(const Type *T) { 611 uint64_t Width=0; 612 unsigned Align=8; 613 switch (T->getTypeClass()) { 614#define TYPE(Class, Base) 615#define ABSTRACT_TYPE(Class, Base) 616#define NON_CANONICAL_TYPE(Class, Base) 617#define DEPENDENT_TYPE(Class, Base) case Type::Class: 618#include "clang/AST/TypeNodes.def" 619 assert(false && "Should not see dependent types"); 620 break; 621 622 case Type::FunctionNoProto: 623 case Type::FunctionProto: 624 // GCC extension: alignof(function) = 32 bits 625 Width = 0; 626 Align = 32; 627 break; 628 629 case Type::IncompleteArray: 630 case Type::VariableArray: 631 Width = 0; 632 Align = getTypeAlign(cast<ArrayType>(T)->getElementType()); 633 break; 634 635 case Type::ConstantArray: { 636 const ConstantArrayType *CAT = cast<ConstantArrayType>(T); 637 638 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(CAT->getElementType()); 639 Width = EltInfo.first*CAT->getSize().getZExtValue(); 640 Align = EltInfo.second; 641 break; 642 } 643 case Type::ExtVector: 644 case Type::Vector: { 645 const VectorType *VT = cast<VectorType>(T); 646 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(VT->getElementType()); 647 Width = EltInfo.first*VT->getNumElements(); 648 Align = Width; 649 // If the alignment is not a power of 2, round up to the next power of 2. 650 // This happens for non-power-of-2 length vectors. 651 if (Align & (Align-1)) { 652 Align = llvm::NextPowerOf2(Align); 653 Width = llvm::RoundUpToAlignment(Width, Align); 654 } 655 break; 656 } 657 658 case Type::Builtin: 659 switch (cast<BuiltinType>(T)->getKind()) { 660 default: assert(0 && "Unknown builtin type!"); 661 case BuiltinType::Void: 662 // GCC extension: alignof(void) = 8 bits. 663 Width = 0; 664 Align = 8; 665 break; 666 667 case BuiltinType::Bool: 668 Width = Target.getBoolWidth(); 669 Align = Target.getBoolAlign(); 670 break; 671 case BuiltinType::Char_S: 672 case BuiltinType::Char_U: 673 case BuiltinType::UChar: 674 case BuiltinType::SChar: 675 Width = Target.getCharWidth(); 676 Align = Target.getCharAlign(); 677 break; 678 case BuiltinType::WChar: 679 Width = Target.getWCharWidth(); 680 Align = Target.getWCharAlign(); 681 break; 682 case BuiltinType::Char16: 683 Width = Target.getChar16Width(); 684 Align = Target.getChar16Align(); 685 break; 686 case BuiltinType::Char32: 687 Width = Target.getChar32Width(); 688 Align = Target.getChar32Align(); 689 break; 690 case BuiltinType::UShort: 691 case BuiltinType::Short: 692 Width = Target.getShortWidth(); 693 Align = Target.getShortAlign(); 694 break; 695 case BuiltinType::UInt: 696 case BuiltinType::Int: 697 Width = Target.getIntWidth(); 698 Align = Target.getIntAlign(); 699 break; 700 case BuiltinType::ULong: 701 case BuiltinType::Long: 702 Width = Target.getLongWidth(); 703 Align = Target.getLongAlign(); 704 break; 705 case BuiltinType::ULongLong: 706 case BuiltinType::LongLong: 707 Width = Target.getLongLongWidth(); 708 Align = Target.getLongLongAlign(); 709 break; 710 case BuiltinType::Int128: 711 case BuiltinType::UInt128: 712 Width = 128; 713 Align = 128; // int128_t is 128-bit aligned on all targets. 714 break; 715 case BuiltinType::Float: 716 Width = Target.getFloatWidth(); 717 Align = Target.getFloatAlign(); 718 break; 719 case BuiltinType::Double: 720 Width = Target.getDoubleWidth(); 721 Align = Target.getDoubleAlign(); 722 break; 723 case BuiltinType::LongDouble: 724 Width = Target.getLongDoubleWidth(); 725 Align = Target.getLongDoubleAlign(); 726 break; 727 case BuiltinType::NullPtr: 728 Width = Target.getPointerWidth(0); // C++ 3.9.1p11: sizeof(nullptr_t) 729 Align = Target.getPointerAlign(0); // == sizeof(void*) 730 break; 731 case BuiltinType::ObjCId: 732 case BuiltinType::ObjCClass: 733 case BuiltinType::ObjCSel: 734 Width = Target.getPointerWidth(0); 735 Align = Target.getPointerAlign(0); 736 break; 737 } 738 break; 739 case Type::ObjCObjectPointer: 740 Width = Target.getPointerWidth(0); 741 Align = Target.getPointerAlign(0); 742 break; 743 case Type::BlockPointer: { 744 unsigned AS = cast<BlockPointerType>(T)->getPointeeType().getAddressSpace(); 745 Width = Target.getPointerWidth(AS); 746 Align = Target.getPointerAlign(AS); 747 break; 748 } 749 case Type::LValueReference: 750 case Type::RValueReference: { 751 // alignof and sizeof should never enter this code path here, so we go 752 // the pointer route. 753 unsigned AS = cast<ReferenceType>(T)->getPointeeType().getAddressSpace(); 754 Width = Target.getPointerWidth(AS); 755 Align = Target.getPointerAlign(AS); 756 break; 757 } 758 case Type::Pointer: { 759 unsigned AS = cast<PointerType>(T)->getPointeeType().getAddressSpace(); 760 Width = Target.getPointerWidth(AS); 761 Align = Target.getPointerAlign(AS); 762 break; 763 } 764 case Type::MemberPointer: { 765 const MemberPointerType *MPT = cast<MemberPointerType>(T); 766 std::pair<uint64_t, unsigned> PtrDiffInfo = 767 getTypeInfo(getPointerDiffType()); 768 Width = PtrDiffInfo.first * ABI->getMemberPointerSize(MPT); 769 Align = PtrDiffInfo.second; 770 break; 771 } 772 case Type::Complex: { 773 // Complex types have the same alignment as their elements, but twice the 774 // size. 775 std::pair<uint64_t, unsigned> EltInfo = 776 getTypeInfo(cast<ComplexType>(T)->getElementType()); 777 Width = EltInfo.first*2; 778 Align = EltInfo.second; 779 break; 780 } 781 case Type::ObjCObject: 782 return getTypeInfo(cast<ObjCObjectType>(T)->getBaseType().getTypePtr()); 783 case Type::ObjCInterface: { 784 const ObjCInterfaceType *ObjCI = cast<ObjCInterfaceType>(T); 785 const ASTRecordLayout &Layout = getASTObjCInterfaceLayout(ObjCI->getDecl()); 786 Width = Layout.getSize(); 787 Align = Layout.getAlignment(); 788 break; 789 } 790 case Type::Record: 791 case Type::Enum: { 792 const TagType *TT = cast<TagType>(T); 793 794 if (TT->getDecl()->isInvalidDecl()) { 795 Width = 1; 796 Align = 1; 797 break; 798 } 799 800 if (const EnumType *ET = dyn_cast<EnumType>(TT)) 801 return getTypeInfo(ET->getDecl()->getIntegerType()); 802 803 const RecordType *RT = cast<RecordType>(TT); 804 const ASTRecordLayout &Layout = getASTRecordLayout(RT->getDecl()); 805 Width = Layout.getSize(); 806 Align = Layout.getAlignment(); 807 break; 808 } 809 810 case Type::SubstTemplateTypeParm: 811 return getTypeInfo(cast<SubstTemplateTypeParmType>(T)-> 812 getReplacementType().getTypePtr()); 813 814 case Type::Typedef: { 815 const TypedefDecl *Typedef = cast<TypedefType>(T)->getDecl(); 816 std::pair<uint64_t, unsigned> Info 817 = getTypeInfo(Typedef->getUnderlyingType().getTypePtr()); 818 Align = std::max(Typedef->getMaxAlignment(), Info.second); 819 Width = Info.first; 820 break; 821 } 822 823 case Type::TypeOfExpr: 824 return getTypeInfo(cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType() 825 .getTypePtr()); 826 827 case Type::TypeOf: 828 return getTypeInfo(cast<TypeOfType>(T)->getUnderlyingType().getTypePtr()); 829 830 case Type::Decltype: 831 return getTypeInfo(cast<DecltypeType>(T)->getUnderlyingExpr()->getType() 832 .getTypePtr()); 833 834 case Type::Elaborated: 835 return getTypeInfo(cast<ElaboratedType>(T)->getNamedType().getTypePtr()); 836 837 case Type::TemplateSpecialization: 838 assert(getCanonicalType(T) != T && 839 "Cannot request the size of a dependent type"); 840 // FIXME: this is likely to be wrong once we support template 841 // aliases, since a template alias could refer to a typedef that 842 // has an __aligned__ attribute on it. 843 return getTypeInfo(getCanonicalType(T)); 844 } 845 846 assert(Align && (Align & (Align-1)) == 0 && "Alignment must be power of 2"); 847 return std::make_pair(Width, Align); 848} 849 850/// getTypeSizeInChars - Return the size of the specified type, in characters. 851/// This method does not work on incomplete types. 852CharUnits ASTContext::getTypeSizeInChars(QualType T) { 853 return CharUnits::fromQuantity(getTypeSize(T) / getCharWidth()); 854} 855CharUnits ASTContext::getTypeSizeInChars(const Type *T) { 856 return CharUnits::fromQuantity(getTypeSize(T) / getCharWidth()); 857} 858 859/// getTypeAlignInChars - Return the ABI-specified alignment of a type, in 860/// characters. This method does not work on incomplete types. 861CharUnits ASTContext::getTypeAlignInChars(QualType T) { 862 return CharUnits::fromQuantity(getTypeAlign(T) / getCharWidth()); 863} 864CharUnits ASTContext::getTypeAlignInChars(const Type *T) { 865 return CharUnits::fromQuantity(getTypeAlign(T) / getCharWidth()); 866} 867 868/// getPreferredTypeAlign - Return the "preferred" alignment of the specified 869/// type for the current target in bits. This can be different than the ABI 870/// alignment in cases where it is beneficial for performance to overalign 871/// a data type. 872unsigned ASTContext::getPreferredTypeAlign(const Type *T) { 873 unsigned ABIAlign = getTypeAlign(T); 874 875 // Double and long long should be naturally aligned if possible. 876 if (const ComplexType* CT = T->getAs<ComplexType>()) 877 T = CT->getElementType().getTypePtr(); 878 if (T->isSpecificBuiltinType(BuiltinType::Double) || 879 T->isSpecificBuiltinType(BuiltinType::LongLong)) 880 return std::max(ABIAlign, (unsigned)getTypeSize(T)); 881 882 return ABIAlign; 883} 884 885/// ShallowCollectObjCIvars - 886/// Collect all ivars, including those synthesized, in the current class. 887/// 888void ASTContext::ShallowCollectObjCIvars(const ObjCInterfaceDecl *OI, 889 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 890 // FIXME. This need be removed but there are two many places which 891 // assume const-ness of ObjCInterfaceDecl 892 ObjCInterfaceDecl *IDecl = const_cast<ObjCInterfaceDecl *>(OI); 893 for (ObjCIvarDecl *Iv = IDecl->all_declared_ivar_begin(); Iv; 894 Iv= Iv->getNextIvar()) 895 Ivars.push_back(Iv); 896} 897 898/// DeepCollectObjCIvars - 899/// This routine first collects all declared, but not synthesized, ivars in 900/// super class and then collects all ivars, including those synthesized for 901/// current class. This routine is used for implementation of current class 902/// when all ivars, declared and synthesized are known. 903/// 904void ASTContext::DeepCollectObjCIvars(const ObjCInterfaceDecl *OI, 905 bool leafClass, 906 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 907 if (const ObjCInterfaceDecl *SuperClass = OI->getSuperClass()) 908 DeepCollectObjCIvars(SuperClass, false, Ivars); 909 if (!leafClass) { 910 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 911 E = OI->ivar_end(); I != E; ++I) 912 Ivars.push_back(*I); 913 } 914 else 915 ShallowCollectObjCIvars(OI, Ivars); 916} 917 918/// CollectInheritedProtocols - Collect all protocols in current class and 919/// those inherited by it. 920void ASTContext::CollectInheritedProtocols(const Decl *CDecl, 921 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols) { 922 if (const ObjCInterfaceDecl *OI = dyn_cast<ObjCInterfaceDecl>(CDecl)) { 923 // We can use protocol_iterator here instead of 924 // all_referenced_protocol_iterator since we are walking all categories. 925 for (ObjCInterfaceDecl::all_protocol_iterator P = OI->all_referenced_protocol_begin(), 926 PE = OI->all_referenced_protocol_end(); P != PE; ++P) { 927 ObjCProtocolDecl *Proto = (*P); 928 Protocols.insert(Proto); 929 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 930 PE = Proto->protocol_end(); P != PE; ++P) { 931 Protocols.insert(*P); 932 CollectInheritedProtocols(*P, Protocols); 933 } 934 } 935 936 // Categories of this Interface. 937 for (const ObjCCategoryDecl *CDeclChain = OI->getCategoryList(); 938 CDeclChain; CDeclChain = CDeclChain->getNextClassCategory()) 939 CollectInheritedProtocols(CDeclChain, Protocols); 940 if (ObjCInterfaceDecl *SD = OI->getSuperClass()) 941 while (SD) { 942 CollectInheritedProtocols(SD, Protocols); 943 SD = SD->getSuperClass(); 944 } 945 } else if (const ObjCCategoryDecl *OC = dyn_cast<ObjCCategoryDecl>(CDecl)) { 946 for (ObjCCategoryDecl::protocol_iterator P = OC->protocol_begin(), 947 PE = OC->protocol_end(); P != PE; ++P) { 948 ObjCProtocolDecl *Proto = (*P); 949 Protocols.insert(Proto); 950 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 951 PE = Proto->protocol_end(); P != PE; ++P) 952 CollectInheritedProtocols(*P, Protocols); 953 } 954 } else if (const ObjCProtocolDecl *OP = dyn_cast<ObjCProtocolDecl>(CDecl)) { 955 for (ObjCProtocolDecl::protocol_iterator P = OP->protocol_begin(), 956 PE = OP->protocol_end(); P != PE; ++P) { 957 ObjCProtocolDecl *Proto = (*P); 958 Protocols.insert(Proto); 959 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 960 PE = Proto->protocol_end(); P != PE; ++P) 961 CollectInheritedProtocols(*P, Protocols); 962 } 963 } 964} 965 966unsigned ASTContext::CountNonClassIvars(const ObjCInterfaceDecl *OI) { 967 unsigned count = 0; 968 // Count ivars declared in class extension. 969 for (const ObjCCategoryDecl *CDecl = OI->getFirstClassExtension(); CDecl; 970 CDecl = CDecl->getNextClassExtension()) 971 count += CDecl->ivar_size(); 972 973 // Count ivar defined in this class's implementation. This 974 // includes synthesized ivars. 975 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) 976 count += ImplDecl->ivar_size(); 977 978 return count; 979} 980 981/// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 982ObjCImplementationDecl *ASTContext::getObjCImplementation(ObjCInterfaceDecl *D) { 983 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 984 I = ObjCImpls.find(D); 985 if (I != ObjCImpls.end()) 986 return cast<ObjCImplementationDecl>(I->second); 987 return 0; 988} 989/// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 990ObjCCategoryImplDecl *ASTContext::getObjCImplementation(ObjCCategoryDecl *D) { 991 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 992 I = ObjCImpls.find(D); 993 if (I != ObjCImpls.end()) 994 return cast<ObjCCategoryImplDecl>(I->second); 995 return 0; 996} 997 998/// \brief Set the implementation of ObjCInterfaceDecl. 999void ASTContext::setObjCImplementation(ObjCInterfaceDecl *IFaceD, 1000 ObjCImplementationDecl *ImplD) { 1001 assert(IFaceD && ImplD && "Passed null params"); 1002 ObjCImpls[IFaceD] = ImplD; 1003} 1004/// \brief Set the implementation of ObjCCategoryDecl. 1005void ASTContext::setObjCImplementation(ObjCCategoryDecl *CatD, 1006 ObjCCategoryImplDecl *ImplD) { 1007 assert(CatD && ImplD && "Passed null params"); 1008 ObjCImpls[CatD] = ImplD; 1009} 1010 1011/// \brief Allocate an uninitialized TypeSourceInfo. 1012/// 1013/// The caller should initialize the memory held by TypeSourceInfo using 1014/// the TypeLoc wrappers. 1015/// 1016/// \param T the type that will be the basis for type source info. This type 1017/// should refer to how the declarator was written in source code, not to 1018/// what type semantic analysis resolved the declarator to. 1019TypeSourceInfo *ASTContext::CreateTypeSourceInfo(QualType T, 1020 unsigned DataSize) { 1021 if (!DataSize) 1022 DataSize = TypeLoc::getFullDataSizeForType(T); 1023 else 1024 assert(DataSize == TypeLoc::getFullDataSizeForType(T) && 1025 "incorrect data size provided to CreateTypeSourceInfo!"); 1026 1027 TypeSourceInfo *TInfo = 1028 (TypeSourceInfo*)BumpAlloc.Allocate(sizeof(TypeSourceInfo) + DataSize, 8); 1029 new (TInfo) TypeSourceInfo(T); 1030 return TInfo; 1031} 1032 1033TypeSourceInfo *ASTContext::getTrivialTypeSourceInfo(QualType T, 1034 SourceLocation L) { 1035 TypeSourceInfo *DI = CreateTypeSourceInfo(T); 1036 DI->getTypeLoc().initialize(L); 1037 return DI; 1038} 1039 1040const ASTRecordLayout & 1041ASTContext::getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) { 1042 return getObjCLayout(D, 0); 1043} 1044 1045const ASTRecordLayout & 1046ASTContext::getASTObjCImplementationLayout(const ObjCImplementationDecl *D) { 1047 return getObjCLayout(D->getClassInterface(), D); 1048} 1049 1050//===----------------------------------------------------------------------===// 1051// Type creation/memoization methods 1052//===----------------------------------------------------------------------===// 1053 1054QualType ASTContext::getExtQualType(const Type *TypeNode, Qualifiers Quals) { 1055 unsigned Fast = Quals.getFastQualifiers(); 1056 Quals.removeFastQualifiers(); 1057 1058 // Check if we've already instantiated this type. 1059 llvm::FoldingSetNodeID ID; 1060 ExtQuals::Profile(ID, TypeNode, Quals); 1061 void *InsertPos = 0; 1062 if (ExtQuals *EQ = ExtQualNodes.FindNodeOrInsertPos(ID, InsertPos)) { 1063 assert(EQ->getQualifiers() == Quals); 1064 QualType T = QualType(EQ, Fast); 1065 return T; 1066 } 1067 1068 ExtQuals *New = new (*this, TypeAlignment) ExtQuals(*this, TypeNode, Quals); 1069 ExtQualNodes.InsertNode(New, InsertPos); 1070 QualType T = QualType(New, Fast); 1071 return T; 1072} 1073 1074QualType ASTContext::getVolatileType(QualType T) { 1075 QualType CanT = getCanonicalType(T); 1076 if (CanT.isVolatileQualified()) return T; 1077 1078 QualifierCollector Quals; 1079 const Type *TypeNode = Quals.strip(T); 1080 Quals.addVolatile(); 1081 1082 return getExtQualType(TypeNode, Quals); 1083} 1084 1085QualType ASTContext::getAddrSpaceQualType(QualType T, unsigned AddressSpace) { 1086 QualType CanT = getCanonicalType(T); 1087 if (CanT.getAddressSpace() == AddressSpace) 1088 return T; 1089 1090 // If we are composing extended qualifiers together, merge together 1091 // into one ExtQuals node. 1092 QualifierCollector Quals; 1093 const Type *TypeNode = Quals.strip(T); 1094 1095 // If this type already has an address space specified, it cannot get 1096 // another one. 1097 assert(!Quals.hasAddressSpace() && 1098 "Type cannot be in multiple addr spaces!"); 1099 Quals.addAddressSpace(AddressSpace); 1100 1101 return getExtQualType(TypeNode, Quals); 1102} 1103 1104QualType ASTContext::getObjCGCQualType(QualType T, 1105 Qualifiers::GC GCAttr) { 1106 QualType CanT = getCanonicalType(T); 1107 if (CanT.getObjCGCAttr() == GCAttr) 1108 return T; 1109 1110 if (T->isPointerType()) { 1111 QualType Pointee = T->getAs<PointerType>()->getPointeeType(); 1112 if (Pointee->isAnyPointerType()) { 1113 QualType ResultType = getObjCGCQualType(Pointee, GCAttr); 1114 return getPointerType(ResultType); 1115 } 1116 } 1117 1118 // If we are composing extended qualifiers together, merge together 1119 // into one ExtQuals node. 1120 QualifierCollector Quals; 1121 const Type *TypeNode = Quals.strip(T); 1122 1123 // If this type already has an ObjCGC specified, it cannot get 1124 // another one. 1125 assert(!Quals.hasObjCGCAttr() && 1126 "Type cannot have multiple ObjCGCs!"); 1127 Quals.addObjCGCAttr(GCAttr); 1128 1129 return getExtQualType(TypeNode, Quals); 1130} 1131 1132static QualType getExtFunctionType(ASTContext& Context, QualType T, 1133 const FunctionType::ExtInfo &Info) { 1134 QualType ResultType; 1135 if (const PointerType *Pointer = T->getAs<PointerType>()) { 1136 QualType Pointee = Pointer->getPointeeType(); 1137 ResultType = getExtFunctionType(Context, Pointee, Info); 1138 if (ResultType == Pointee) 1139 return T; 1140 1141 ResultType = Context.getPointerType(ResultType); 1142 } else if (const BlockPointerType *BlockPointer 1143 = T->getAs<BlockPointerType>()) { 1144 QualType Pointee = BlockPointer->getPointeeType(); 1145 ResultType = getExtFunctionType(Context, Pointee, Info); 1146 if (ResultType == Pointee) 1147 return T; 1148 1149 ResultType = Context.getBlockPointerType(ResultType); 1150 } else if (const MemberPointerType *MemberPointer 1151 = T->getAs<MemberPointerType>()) { 1152 QualType Pointee = MemberPointer->getPointeeType(); 1153 ResultType = getExtFunctionType(Context, Pointee, Info); 1154 if (ResultType == Pointee) 1155 return T; 1156 1157 ResultType = Context.getMemberPointerType(ResultType, 1158 MemberPointer->getClass()); 1159 } else if (const FunctionType *F = T->getAs<FunctionType>()) { 1160 if (F->getExtInfo() == Info) 1161 return T; 1162 1163 if (const FunctionNoProtoType *FNPT = dyn_cast<FunctionNoProtoType>(F)) { 1164 ResultType = Context.getFunctionNoProtoType(FNPT->getResultType(), 1165 Info); 1166 } else { 1167 const FunctionProtoType *FPT = cast<FunctionProtoType>(F); 1168 ResultType 1169 = Context.getFunctionType(FPT->getResultType(), FPT->arg_type_begin(), 1170 FPT->getNumArgs(), FPT->isVariadic(), 1171 FPT->getTypeQuals(), 1172 FPT->hasExceptionSpec(), 1173 FPT->hasAnyExceptionSpec(), 1174 FPT->getNumExceptions(), 1175 FPT->exception_begin(), 1176 Info); 1177 } 1178 } else 1179 return T; 1180 1181 return Context.getQualifiedType(ResultType, T.getLocalQualifiers()); 1182} 1183 1184QualType ASTContext::getNoReturnType(QualType T, bool AddNoReturn) { 1185 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1186 return getExtFunctionType(*this, T, 1187 Info.withNoReturn(AddNoReturn)); 1188} 1189 1190QualType ASTContext::getCallConvType(QualType T, CallingConv CallConv) { 1191 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1192 return getExtFunctionType(*this, T, 1193 Info.withCallingConv(CallConv)); 1194} 1195 1196QualType ASTContext::getRegParmType(QualType T, unsigned RegParm) { 1197 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1198 return getExtFunctionType(*this, T, 1199 Info.withRegParm(RegParm)); 1200} 1201 1202/// getComplexType - Return the uniqued reference to the type for a complex 1203/// number with the specified element type. 1204QualType ASTContext::getComplexType(QualType T) { 1205 // Unique pointers, to guarantee there is only one pointer of a particular 1206 // structure. 1207 llvm::FoldingSetNodeID ID; 1208 ComplexType::Profile(ID, T); 1209 1210 void *InsertPos = 0; 1211 if (ComplexType *CT = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos)) 1212 return QualType(CT, 0); 1213 1214 // If the pointee type isn't canonical, this won't be a canonical type either, 1215 // so fill in the canonical type field. 1216 QualType Canonical; 1217 if (!T.isCanonical()) { 1218 Canonical = getComplexType(getCanonicalType(T)); 1219 1220 // Get the new insert position for the node we care about. 1221 ComplexType *NewIP = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos); 1222 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1223 } 1224 ComplexType *New = new (*this, TypeAlignment) ComplexType(T, Canonical); 1225 Types.push_back(New); 1226 ComplexTypes.InsertNode(New, InsertPos); 1227 return QualType(New, 0); 1228} 1229 1230/// getPointerType - Return the uniqued reference to the type for a pointer to 1231/// the specified type. 1232QualType ASTContext::getPointerType(QualType T) { 1233 // Unique pointers, to guarantee there is only one pointer of a particular 1234 // structure. 1235 llvm::FoldingSetNodeID ID; 1236 PointerType::Profile(ID, T); 1237 1238 void *InsertPos = 0; 1239 if (PointerType *PT = PointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1240 return QualType(PT, 0); 1241 1242 // If the pointee type isn't canonical, this won't be a canonical type either, 1243 // so fill in the canonical type field. 1244 QualType Canonical; 1245 if (!T.isCanonical()) { 1246 Canonical = getPointerType(getCanonicalType(T)); 1247 1248 // Get the new insert position for the node we care about. 1249 PointerType *NewIP = PointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1250 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1251 } 1252 PointerType *New = new (*this, TypeAlignment) PointerType(T, Canonical); 1253 Types.push_back(New); 1254 PointerTypes.InsertNode(New, InsertPos); 1255 return QualType(New, 0); 1256} 1257 1258/// getBlockPointerType - Return the uniqued reference to the type for 1259/// a pointer to the specified block. 1260QualType ASTContext::getBlockPointerType(QualType T) { 1261 assert(T->isFunctionType() && "block of function types only"); 1262 // Unique pointers, to guarantee there is only one block of a particular 1263 // structure. 1264 llvm::FoldingSetNodeID ID; 1265 BlockPointerType::Profile(ID, T); 1266 1267 void *InsertPos = 0; 1268 if (BlockPointerType *PT = 1269 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1270 return QualType(PT, 0); 1271 1272 // If the block pointee type isn't canonical, this won't be a canonical 1273 // type either so fill in the canonical type field. 1274 QualType Canonical; 1275 if (!T.isCanonical()) { 1276 Canonical = getBlockPointerType(getCanonicalType(T)); 1277 1278 // Get the new insert position for the node we care about. 1279 BlockPointerType *NewIP = 1280 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1281 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1282 } 1283 BlockPointerType *New 1284 = new (*this, TypeAlignment) BlockPointerType(T, Canonical); 1285 Types.push_back(New); 1286 BlockPointerTypes.InsertNode(New, InsertPos); 1287 return QualType(New, 0); 1288} 1289 1290/// getLValueReferenceType - Return the uniqued reference to the type for an 1291/// lvalue reference to the specified type. 1292QualType ASTContext::getLValueReferenceType(QualType T, bool SpelledAsLValue) { 1293 // Unique pointers, to guarantee there is only one pointer of a particular 1294 // structure. 1295 llvm::FoldingSetNodeID ID; 1296 ReferenceType::Profile(ID, T, SpelledAsLValue); 1297 1298 void *InsertPos = 0; 1299 if (LValueReferenceType *RT = 1300 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1301 return QualType(RT, 0); 1302 1303 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1304 1305 // If the referencee type isn't canonical, this won't be a canonical type 1306 // either, so fill in the canonical type field. 1307 QualType Canonical; 1308 if (!SpelledAsLValue || InnerRef || !T.isCanonical()) { 1309 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1310 Canonical = getLValueReferenceType(getCanonicalType(PointeeType)); 1311 1312 // Get the new insert position for the node we care about. 1313 LValueReferenceType *NewIP = 1314 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1315 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1316 } 1317 1318 LValueReferenceType *New 1319 = new (*this, TypeAlignment) LValueReferenceType(T, Canonical, 1320 SpelledAsLValue); 1321 Types.push_back(New); 1322 LValueReferenceTypes.InsertNode(New, InsertPos); 1323 1324 return QualType(New, 0); 1325} 1326 1327/// getRValueReferenceType - Return the uniqued reference to the type for an 1328/// rvalue reference to the specified type. 1329QualType ASTContext::getRValueReferenceType(QualType T) { 1330 // Unique pointers, to guarantee there is only one pointer of a particular 1331 // structure. 1332 llvm::FoldingSetNodeID ID; 1333 ReferenceType::Profile(ID, T, false); 1334 1335 void *InsertPos = 0; 1336 if (RValueReferenceType *RT = 1337 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1338 return QualType(RT, 0); 1339 1340 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1341 1342 // If the referencee type isn't canonical, this won't be a canonical type 1343 // either, so fill in the canonical type field. 1344 QualType Canonical; 1345 if (InnerRef || !T.isCanonical()) { 1346 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1347 Canonical = getRValueReferenceType(getCanonicalType(PointeeType)); 1348 1349 // Get the new insert position for the node we care about. 1350 RValueReferenceType *NewIP = 1351 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1352 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1353 } 1354 1355 RValueReferenceType *New 1356 = new (*this, TypeAlignment) RValueReferenceType(T, Canonical); 1357 Types.push_back(New); 1358 RValueReferenceTypes.InsertNode(New, InsertPos); 1359 return QualType(New, 0); 1360} 1361 1362/// getMemberPointerType - Return the uniqued reference to the type for a 1363/// member pointer to the specified type, in the specified class. 1364QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls) { 1365 // Unique pointers, to guarantee there is only one pointer of a particular 1366 // structure. 1367 llvm::FoldingSetNodeID ID; 1368 MemberPointerType::Profile(ID, T, Cls); 1369 1370 void *InsertPos = 0; 1371 if (MemberPointerType *PT = 1372 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1373 return QualType(PT, 0); 1374 1375 // If the pointee or class type isn't canonical, this won't be a canonical 1376 // type either, so fill in the canonical type field. 1377 QualType Canonical; 1378 if (!T.isCanonical() || !Cls->isCanonicalUnqualified()) { 1379 Canonical = getMemberPointerType(getCanonicalType(T),getCanonicalType(Cls)); 1380 1381 // Get the new insert position for the node we care about. 1382 MemberPointerType *NewIP = 1383 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1384 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1385 } 1386 MemberPointerType *New 1387 = new (*this, TypeAlignment) MemberPointerType(T, Cls, Canonical); 1388 Types.push_back(New); 1389 MemberPointerTypes.InsertNode(New, InsertPos); 1390 return QualType(New, 0); 1391} 1392 1393/// getConstantArrayType - Return the unique reference to the type for an 1394/// array of the specified element type. 1395QualType ASTContext::getConstantArrayType(QualType EltTy, 1396 const llvm::APInt &ArySizeIn, 1397 ArrayType::ArraySizeModifier ASM, 1398 unsigned EltTypeQuals) { 1399 assert((EltTy->isDependentType() || 1400 EltTy->isIncompleteType() || EltTy->isConstantSizeType()) && 1401 "Constant array of VLAs is illegal!"); 1402 1403 // Convert the array size into a canonical width matching the pointer size for 1404 // the target. 1405 llvm::APInt ArySize(ArySizeIn); 1406 ArySize.zextOrTrunc(Target.getPointerWidth(EltTy.getAddressSpace())); 1407 1408 llvm::FoldingSetNodeID ID; 1409 ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, EltTypeQuals); 1410 1411 void *InsertPos = 0; 1412 if (ConstantArrayType *ATP = 1413 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1414 return QualType(ATP, 0); 1415 1416 // If the element type isn't canonical, this won't be a canonical type either, 1417 // so fill in the canonical type field. 1418 QualType Canonical; 1419 if (!EltTy.isCanonical()) { 1420 Canonical = getConstantArrayType(getCanonicalType(EltTy), ArySize, 1421 ASM, EltTypeQuals); 1422 // Get the new insert position for the node we care about. 1423 ConstantArrayType *NewIP = 1424 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1425 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1426 } 1427 1428 ConstantArrayType *New = new(*this,TypeAlignment) 1429 ConstantArrayType(EltTy, Canonical, ArySize, ASM, EltTypeQuals); 1430 ConstantArrayTypes.InsertNode(New, InsertPos); 1431 Types.push_back(New); 1432 return QualType(New, 0); 1433} 1434 1435/// getIncompleteArrayType - Returns a unique reference to the type for a 1436/// incomplete array of the specified element type. 1437QualType ASTContext::getUnknownSizeVariableArrayType(QualType Ty) { 1438 QualType ElemTy = getBaseElementType(Ty); 1439 DeclarationName Name; 1440 llvm::SmallVector<QualType, 8> ATypes; 1441 QualType ATy = Ty; 1442 while (const ArrayType *AT = getAsArrayType(ATy)) { 1443 ATypes.push_back(ATy); 1444 ATy = AT->getElementType(); 1445 } 1446 for (int i = ATypes.size() - 1; i >= 0; i--) { 1447 if (const VariableArrayType *VAT = getAsVariableArrayType(ATypes[i])) { 1448 ElemTy = getVariableArrayType(ElemTy, /*ArraySize*/0, ArrayType::Star, 1449 0, VAT->getBracketsRange()); 1450 } 1451 else if (const ConstantArrayType *CAT = getAsConstantArrayType(ATypes[i])) { 1452 llvm::APSInt ConstVal(CAT->getSize()); 1453 ElemTy = getConstantArrayType(ElemTy, ConstVal, ArrayType::Normal, 0); 1454 } 1455 else if (getAsIncompleteArrayType(ATypes[i])) { 1456 ElemTy = getVariableArrayType(ElemTy, /*ArraySize*/0, ArrayType::Normal, 1457 0, SourceRange()); 1458 } 1459 else 1460 assert(false && "DependentArrayType is seen"); 1461 } 1462 return ElemTy; 1463} 1464 1465/// getVariableArrayDecayedType - Returns a vla type where known sizes 1466/// are replaced with [*] 1467QualType ASTContext::getVariableArrayDecayedType(QualType Ty) { 1468 if (Ty->isPointerType()) { 1469 QualType BaseType = Ty->getAs<PointerType>()->getPointeeType(); 1470 if (isa<VariableArrayType>(BaseType)) { 1471 ArrayType *AT = dyn_cast<ArrayType>(BaseType); 1472 VariableArrayType *VAT = cast<VariableArrayType>(AT); 1473 if (VAT->getSizeExpr()) { 1474 Ty = getUnknownSizeVariableArrayType(BaseType); 1475 Ty = getPointerType(Ty); 1476 } 1477 } 1478 } 1479 return Ty; 1480} 1481 1482 1483/// getVariableArrayType - Returns a non-unique reference to the type for a 1484/// variable array of the specified element type. 1485QualType ASTContext::getVariableArrayType(QualType EltTy, 1486 Expr *NumElts, 1487 ArrayType::ArraySizeModifier ASM, 1488 unsigned EltTypeQuals, 1489 SourceRange Brackets) { 1490 // Since we don't unique expressions, it isn't possible to unique VLA's 1491 // that have an expression provided for their size. 1492 QualType CanonType; 1493 1494 if (!EltTy.isCanonical()) { 1495 CanonType = getVariableArrayType(getCanonicalType(EltTy), NumElts, ASM, 1496 EltTypeQuals, Brackets); 1497 } 1498 1499 VariableArrayType *New = new(*this, TypeAlignment) 1500 VariableArrayType(EltTy, CanonType, NumElts, ASM, EltTypeQuals, Brackets); 1501 1502 VariableArrayTypes.push_back(New); 1503 Types.push_back(New); 1504 return QualType(New, 0); 1505} 1506 1507/// getDependentSizedArrayType - Returns a non-unique reference to 1508/// the type for a dependently-sized array of the specified element 1509/// type. 1510QualType ASTContext::getDependentSizedArrayType(QualType EltTy, 1511 Expr *NumElts, 1512 ArrayType::ArraySizeModifier ASM, 1513 unsigned EltTypeQuals, 1514 SourceRange Brackets) { 1515 assert((!NumElts || NumElts->isTypeDependent() || 1516 NumElts->isValueDependent()) && 1517 "Size must be type- or value-dependent!"); 1518 1519 void *InsertPos = 0; 1520 DependentSizedArrayType *Canon = 0; 1521 llvm::FoldingSetNodeID ID; 1522 1523 QualType CanonicalEltTy = getCanonicalType(EltTy); 1524 if (NumElts) { 1525 // Dependently-sized array types that do not have a specified 1526 // number of elements will have their sizes deduced from an 1527 // initializer. 1528 DependentSizedArrayType::Profile(ID, *this, CanonicalEltTy, ASM, 1529 EltTypeQuals, NumElts); 1530 1531 Canon = DependentSizedArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1532 } 1533 1534 DependentSizedArrayType *New; 1535 if (Canon) { 1536 // We already have a canonical version of this array type; use it as 1537 // the canonical type for a newly-built type. 1538 New = new (*this, TypeAlignment) 1539 DependentSizedArrayType(*this, EltTy, QualType(Canon, 0), 1540 NumElts, ASM, EltTypeQuals, Brackets); 1541 } else if (CanonicalEltTy == EltTy) { 1542 // This is a canonical type. Record it. 1543 New = new (*this, TypeAlignment) 1544 DependentSizedArrayType(*this, EltTy, QualType(), 1545 NumElts, ASM, EltTypeQuals, Brackets); 1546 1547 if (NumElts) { 1548#ifndef NDEBUG 1549 DependentSizedArrayType *CanonCheck 1550 = DependentSizedArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1551 assert(!CanonCheck && "Dependent-sized canonical array type broken"); 1552 (void)CanonCheck; 1553#endif 1554 DependentSizedArrayTypes.InsertNode(New, InsertPos); 1555 } 1556 } else { 1557 QualType Canon = getDependentSizedArrayType(CanonicalEltTy, NumElts, 1558 ASM, EltTypeQuals, 1559 SourceRange()); 1560 New = new (*this, TypeAlignment) 1561 DependentSizedArrayType(*this, EltTy, Canon, 1562 NumElts, ASM, EltTypeQuals, Brackets); 1563 } 1564 1565 Types.push_back(New); 1566 return QualType(New, 0); 1567} 1568 1569QualType ASTContext::getIncompleteArrayType(QualType EltTy, 1570 ArrayType::ArraySizeModifier ASM, 1571 unsigned EltTypeQuals) { 1572 llvm::FoldingSetNodeID ID; 1573 IncompleteArrayType::Profile(ID, EltTy, ASM, EltTypeQuals); 1574 1575 void *InsertPos = 0; 1576 if (IncompleteArrayType *ATP = 1577 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1578 return QualType(ATP, 0); 1579 1580 // If the element type isn't canonical, this won't be a canonical type 1581 // either, so fill in the canonical type field. 1582 QualType Canonical; 1583 1584 if (!EltTy.isCanonical()) { 1585 Canonical = getIncompleteArrayType(getCanonicalType(EltTy), 1586 ASM, EltTypeQuals); 1587 1588 // Get the new insert position for the node we care about. 1589 IncompleteArrayType *NewIP = 1590 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1591 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1592 } 1593 1594 IncompleteArrayType *New = new (*this, TypeAlignment) 1595 IncompleteArrayType(EltTy, Canonical, ASM, EltTypeQuals); 1596 1597 IncompleteArrayTypes.InsertNode(New, InsertPos); 1598 Types.push_back(New); 1599 return QualType(New, 0); 1600} 1601 1602/// getVectorType - Return the unique reference to a vector type of 1603/// the specified element type and size. VectorType must be a built-in type. 1604QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts, 1605 VectorType::VectorKind VecKind) { 1606 BuiltinType *BaseType; 1607 1608 BaseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1609 assert(BaseType != 0 && "getVectorType(): Expecting a built-in type"); 1610 1611 // Check if we've already instantiated a vector of this type. 1612 llvm::FoldingSetNodeID ID; 1613 VectorType::Profile(ID, vecType, NumElts, Type::Vector, VecKind); 1614 1615 void *InsertPos = 0; 1616 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1617 return QualType(VTP, 0); 1618 1619 // If the element type isn't canonical, this won't be a canonical type either, 1620 // so fill in the canonical type field. 1621 QualType Canonical; 1622 if (!vecType.isCanonical()) { 1623 Canonical = getVectorType(getCanonicalType(vecType), NumElts, VecKind); 1624 1625 // Get the new insert position for the node we care about. 1626 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1627 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1628 } 1629 VectorType *New = new (*this, TypeAlignment) 1630 VectorType(vecType, NumElts, Canonical, VecKind); 1631 VectorTypes.InsertNode(New, InsertPos); 1632 Types.push_back(New); 1633 return QualType(New, 0); 1634} 1635 1636/// getExtVectorType - Return the unique reference to an extended vector type of 1637/// the specified element type and size. VectorType must be a built-in type. 1638QualType ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) { 1639 BuiltinType *baseType; 1640 1641 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1642 assert(baseType != 0 && "getExtVectorType(): Expecting a built-in type"); 1643 1644 // Check if we've already instantiated a vector of this type. 1645 llvm::FoldingSetNodeID ID; 1646 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector, 1647 VectorType::GenericVector); 1648 void *InsertPos = 0; 1649 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1650 return QualType(VTP, 0); 1651 1652 // If the element type isn't canonical, this won't be a canonical type either, 1653 // so fill in the canonical type field. 1654 QualType Canonical; 1655 if (!vecType.isCanonical()) { 1656 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts); 1657 1658 // Get the new insert position for the node we care about. 1659 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1660 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1661 } 1662 ExtVectorType *New = new (*this, TypeAlignment) 1663 ExtVectorType(vecType, NumElts, Canonical); 1664 VectorTypes.InsertNode(New, InsertPos); 1665 Types.push_back(New); 1666 return QualType(New, 0); 1667} 1668 1669QualType ASTContext::getDependentSizedExtVectorType(QualType vecType, 1670 Expr *SizeExpr, 1671 SourceLocation AttrLoc) { 1672 llvm::FoldingSetNodeID ID; 1673 DependentSizedExtVectorType::Profile(ID, *this, getCanonicalType(vecType), 1674 SizeExpr); 1675 1676 void *InsertPos = 0; 1677 DependentSizedExtVectorType *Canon 1678 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1679 DependentSizedExtVectorType *New; 1680 if (Canon) { 1681 // We already have a canonical version of this array type; use it as 1682 // the canonical type for a newly-built type. 1683 New = new (*this, TypeAlignment) 1684 DependentSizedExtVectorType(*this, vecType, QualType(Canon, 0), 1685 SizeExpr, AttrLoc); 1686 } else { 1687 QualType CanonVecTy = getCanonicalType(vecType); 1688 if (CanonVecTy == vecType) { 1689 New = new (*this, TypeAlignment) 1690 DependentSizedExtVectorType(*this, vecType, QualType(), SizeExpr, 1691 AttrLoc); 1692 1693 DependentSizedExtVectorType *CanonCheck 1694 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1695 assert(!CanonCheck && "Dependent-sized ext_vector canonical type broken"); 1696 (void)CanonCheck; 1697 DependentSizedExtVectorTypes.InsertNode(New, InsertPos); 1698 } else { 1699 QualType Canon = getDependentSizedExtVectorType(CanonVecTy, SizeExpr, 1700 SourceLocation()); 1701 New = new (*this, TypeAlignment) 1702 DependentSizedExtVectorType(*this, vecType, Canon, SizeExpr, AttrLoc); 1703 } 1704 } 1705 1706 Types.push_back(New); 1707 return QualType(New, 0); 1708} 1709 1710/// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 1711/// 1712QualType ASTContext::getFunctionNoProtoType(QualType ResultTy, 1713 const FunctionType::ExtInfo &Info) { 1714 const CallingConv CallConv = Info.getCC(); 1715 // Unique functions, to guarantee there is only one function of a particular 1716 // structure. 1717 llvm::FoldingSetNodeID ID; 1718 FunctionNoProtoType::Profile(ID, ResultTy, Info); 1719 1720 void *InsertPos = 0; 1721 if (FunctionNoProtoType *FT = 1722 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1723 return QualType(FT, 0); 1724 1725 QualType Canonical; 1726 if (!ResultTy.isCanonical() || 1727 getCanonicalCallConv(CallConv) != CallConv) { 1728 Canonical = 1729 getFunctionNoProtoType(getCanonicalType(ResultTy), 1730 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1731 1732 // Get the new insert position for the node we care about. 1733 FunctionNoProtoType *NewIP = 1734 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1735 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1736 } 1737 1738 FunctionNoProtoType *New = new (*this, TypeAlignment) 1739 FunctionNoProtoType(ResultTy, Canonical, Info); 1740 Types.push_back(New); 1741 FunctionNoProtoTypes.InsertNode(New, InsertPos); 1742 return QualType(New, 0); 1743} 1744 1745/// getFunctionType - Return a normal function type with a typed argument 1746/// list. isVariadic indicates whether the argument list includes '...'. 1747QualType ASTContext::getFunctionType(QualType ResultTy,const QualType *ArgArray, 1748 unsigned NumArgs, bool isVariadic, 1749 unsigned TypeQuals, bool hasExceptionSpec, 1750 bool hasAnyExceptionSpec, unsigned NumExs, 1751 const QualType *ExArray, 1752 const FunctionType::ExtInfo &Info) { 1753 1754 const CallingConv CallConv= Info.getCC(); 1755 // Unique functions, to guarantee there is only one function of a particular 1756 // structure. 1757 llvm::FoldingSetNodeID ID; 1758 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, isVariadic, 1759 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1760 NumExs, ExArray, Info); 1761 1762 void *InsertPos = 0; 1763 if (FunctionProtoType *FTP = 1764 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1765 return QualType(FTP, 0); 1766 1767 // Determine whether the type being created is already canonical or not. 1768 bool isCanonical = !hasExceptionSpec && ResultTy.isCanonical(); 1769 for (unsigned i = 0; i != NumArgs && isCanonical; ++i) 1770 if (!ArgArray[i].isCanonicalAsParam()) 1771 isCanonical = false; 1772 1773 // If this type isn't canonical, get the canonical version of it. 1774 // The exception spec is not part of the canonical type. 1775 QualType Canonical; 1776 if (!isCanonical || getCanonicalCallConv(CallConv) != CallConv) { 1777 llvm::SmallVector<QualType, 16> CanonicalArgs; 1778 CanonicalArgs.reserve(NumArgs); 1779 for (unsigned i = 0; i != NumArgs; ++i) 1780 CanonicalArgs.push_back(getCanonicalParamType(ArgArray[i])); 1781 1782 Canonical = getFunctionType(getCanonicalType(ResultTy), 1783 CanonicalArgs.data(), NumArgs, 1784 isVariadic, TypeQuals, false, 1785 false, 0, 0, 1786 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1787 1788 // Get the new insert position for the node we care about. 1789 FunctionProtoType *NewIP = 1790 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1791 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1792 } 1793 1794 // FunctionProtoType objects are allocated with extra bytes after them 1795 // for two variable size arrays (for parameter and exception types) at the 1796 // end of them. 1797 FunctionProtoType *FTP = 1798 (FunctionProtoType*)Allocate(sizeof(FunctionProtoType) + 1799 NumArgs*sizeof(QualType) + 1800 NumExs*sizeof(QualType), TypeAlignment); 1801 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, isVariadic, 1802 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1803 ExArray, NumExs, Canonical, Info); 1804 Types.push_back(FTP); 1805 FunctionProtoTypes.InsertNode(FTP, InsertPos); 1806 return QualType(FTP, 0); 1807} 1808 1809#ifndef NDEBUG 1810static bool NeedsInjectedClassNameType(const RecordDecl *D) { 1811 if (!isa<CXXRecordDecl>(D)) return false; 1812 const CXXRecordDecl *RD = cast<CXXRecordDecl>(D); 1813 if (isa<ClassTemplatePartialSpecializationDecl>(RD)) 1814 return true; 1815 if (RD->getDescribedClassTemplate() && 1816 !isa<ClassTemplateSpecializationDecl>(RD)) 1817 return true; 1818 return false; 1819} 1820#endif 1821 1822/// getInjectedClassNameType - Return the unique reference to the 1823/// injected class name type for the specified templated declaration. 1824QualType ASTContext::getInjectedClassNameType(CXXRecordDecl *Decl, 1825 QualType TST) { 1826 assert(NeedsInjectedClassNameType(Decl)); 1827 if (Decl->TypeForDecl) { 1828 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1829 } else if (CXXRecordDecl *PrevDecl = Decl->getPreviousDeclaration()) { 1830 assert(PrevDecl->TypeForDecl && "previous declaration has no type"); 1831 Decl->TypeForDecl = PrevDecl->TypeForDecl; 1832 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1833 } else { 1834 Decl->TypeForDecl = 1835 new (*this, TypeAlignment) InjectedClassNameType(Decl, TST); 1836 Types.push_back(Decl->TypeForDecl); 1837 } 1838 return QualType(Decl->TypeForDecl, 0); 1839} 1840 1841/// getTypeDeclType - Return the unique reference to the type for the 1842/// specified type declaration. 1843QualType ASTContext::getTypeDeclTypeSlow(const TypeDecl *Decl) { 1844 assert(Decl && "Passed null for Decl param"); 1845 assert(!Decl->TypeForDecl && "TypeForDecl present in slow case"); 1846 1847 if (const TypedefDecl *Typedef = dyn_cast<TypedefDecl>(Decl)) 1848 return getTypedefType(Typedef); 1849 1850 assert(!isa<TemplateTypeParmDecl>(Decl) && 1851 "Template type parameter types are always available."); 1852 1853 if (const RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) { 1854 assert(!Record->getPreviousDeclaration() && 1855 "struct/union has previous declaration"); 1856 assert(!NeedsInjectedClassNameType(Record)); 1857 return getRecordType(Record); 1858 } else if (const EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) { 1859 assert(!Enum->getPreviousDeclaration() && 1860 "enum has previous declaration"); 1861 return getEnumType(Enum); 1862 } else if (const UnresolvedUsingTypenameDecl *Using = 1863 dyn_cast<UnresolvedUsingTypenameDecl>(Decl)) { 1864 Decl->TypeForDecl = new (*this, TypeAlignment) UnresolvedUsingType(Using); 1865 } else 1866 llvm_unreachable("TypeDecl without a type?"); 1867 1868 Types.push_back(Decl->TypeForDecl); 1869 return QualType(Decl->TypeForDecl, 0); 1870} 1871 1872/// getTypedefType - Return the unique reference to the type for the 1873/// specified typename decl. 1874QualType 1875ASTContext::getTypedefType(const TypedefDecl *Decl, QualType Canonical) { 1876 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1877 1878 if (Canonical.isNull()) 1879 Canonical = getCanonicalType(Decl->getUnderlyingType()); 1880 Decl->TypeForDecl = new(*this, TypeAlignment) 1881 TypedefType(Type::Typedef, Decl, Canonical); 1882 Types.push_back(Decl->TypeForDecl); 1883 return QualType(Decl->TypeForDecl, 0); 1884} 1885 1886QualType ASTContext::getRecordType(const RecordDecl *Decl) { 1887 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1888 1889 if (const RecordDecl *PrevDecl = Decl->getPreviousDeclaration()) 1890 if (PrevDecl->TypeForDecl) 1891 return QualType(Decl->TypeForDecl = PrevDecl->TypeForDecl, 0); 1892 1893 Decl->TypeForDecl = new (*this, TypeAlignment) RecordType(Decl); 1894 Types.push_back(Decl->TypeForDecl); 1895 return QualType(Decl->TypeForDecl, 0); 1896} 1897 1898QualType ASTContext::getEnumType(const EnumDecl *Decl) { 1899 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1900 1901 if (const EnumDecl *PrevDecl = Decl->getPreviousDeclaration()) 1902 if (PrevDecl->TypeForDecl) 1903 return QualType(Decl->TypeForDecl = PrevDecl->TypeForDecl, 0); 1904 1905 Decl->TypeForDecl = new (*this, TypeAlignment) EnumType(Decl); 1906 Types.push_back(Decl->TypeForDecl); 1907 return QualType(Decl->TypeForDecl, 0); 1908} 1909 1910/// \brief Retrieve a substitution-result type. 1911QualType 1912ASTContext::getSubstTemplateTypeParmType(const TemplateTypeParmType *Parm, 1913 QualType Replacement) { 1914 assert(Replacement.isCanonical() 1915 && "replacement types must always be canonical"); 1916 1917 llvm::FoldingSetNodeID ID; 1918 SubstTemplateTypeParmType::Profile(ID, Parm, Replacement); 1919 void *InsertPos = 0; 1920 SubstTemplateTypeParmType *SubstParm 1921 = SubstTemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1922 1923 if (!SubstParm) { 1924 SubstParm = new (*this, TypeAlignment) 1925 SubstTemplateTypeParmType(Parm, Replacement); 1926 Types.push_back(SubstParm); 1927 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 1928 } 1929 1930 return QualType(SubstParm, 0); 1931} 1932 1933/// \brief Retrieve the template type parameter type for a template 1934/// parameter or parameter pack with the given depth, index, and (optionally) 1935/// name. 1936QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index, 1937 bool ParameterPack, 1938 IdentifierInfo *Name) { 1939 llvm::FoldingSetNodeID ID; 1940 TemplateTypeParmType::Profile(ID, Depth, Index, ParameterPack, Name); 1941 void *InsertPos = 0; 1942 TemplateTypeParmType *TypeParm 1943 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1944 1945 if (TypeParm) 1946 return QualType(TypeParm, 0); 1947 1948 if (Name) { 1949 QualType Canon = getTemplateTypeParmType(Depth, Index, ParameterPack); 1950 TypeParm = new (*this, TypeAlignment) 1951 TemplateTypeParmType(Depth, Index, ParameterPack, Name, Canon); 1952 1953 TemplateTypeParmType *TypeCheck 1954 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1955 assert(!TypeCheck && "Template type parameter canonical type broken"); 1956 (void)TypeCheck; 1957 } else 1958 TypeParm = new (*this, TypeAlignment) 1959 TemplateTypeParmType(Depth, Index, ParameterPack); 1960 1961 Types.push_back(TypeParm); 1962 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos); 1963 1964 return QualType(TypeParm, 0); 1965} 1966 1967TypeSourceInfo * 1968ASTContext::getTemplateSpecializationTypeInfo(TemplateName Name, 1969 SourceLocation NameLoc, 1970 const TemplateArgumentListInfo &Args, 1971 QualType CanonType) { 1972 QualType TST = getTemplateSpecializationType(Name, Args, CanonType); 1973 1974 TypeSourceInfo *DI = CreateTypeSourceInfo(TST); 1975 TemplateSpecializationTypeLoc TL 1976 = cast<TemplateSpecializationTypeLoc>(DI->getTypeLoc()); 1977 TL.setTemplateNameLoc(NameLoc); 1978 TL.setLAngleLoc(Args.getLAngleLoc()); 1979 TL.setRAngleLoc(Args.getRAngleLoc()); 1980 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 1981 TL.setArgLocInfo(i, Args[i].getLocInfo()); 1982 return DI; 1983} 1984 1985QualType 1986ASTContext::getTemplateSpecializationType(TemplateName Template, 1987 const TemplateArgumentListInfo &Args, 1988 QualType Canon) { 1989 unsigned NumArgs = Args.size(); 1990 1991 llvm::SmallVector<TemplateArgument, 4> ArgVec; 1992 ArgVec.reserve(NumArgs); 1993 for (unsigned i = 0; i != NumArgs; ++i) 1994 ArgVec.push_back(Args[i].getArgument()); 1995 1996 return getTemplateSpecializationType(Template, ArgVec.data(), NumArgs, 1997 Canon); 1998} 1999 2000QualType 2001ASTContext::getTemplateSpecializationType(TemplateName Template, 2002 const TemplateArgument *Args, 2003 unsigned NumArgs, 2004 QualType Canon) { 2005 if (!Canon.isNull()) 2006 Canon = getCanonicalType(Canon); 2007 else 2008 Canon = getCanonicalTemplateSpecializationType(Template, Args, NumArgs); 2009 2010 // Allocate the (non-canonical) template specialization type, but don't 2011 // try to unique it: these types typically have location information that 2012 // we don't unique and don't want to lose. 2013 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 2014 sizeof(TemplateArgument) * NumArgs), 2015 TypeAlignment); 2016 TemplateSpecializationType *Spec 2017 = new (Mem) TemplateSpecializationType(Template, 2018 Args, NumArgs, 2019 Canon); 2020 2021 Types.push_back(Spec); 2022 return QualType(Spec, 0); 2023} 2024 2025QualType 2026ASTContext::getCanonicalTemplateSpecializationType(TemplateName Template, 2027 const TemplateArgument *Args, 2028 unsigned NumArgs) { 2029 // Build the canonical template specialization type. 2030 TemplateName CanonTemplate = getCanonicalTemplateName(Template); 2031 llvm::SmallVector<TemplateArgument, 4> CanonArgs; 2032 CanonArgs.reserve(NumArgs); 2033 for (unsigned I = 0; I != NumArgs; ++I) 2034 CanonArgs.push_back(getCanonicalTemplateArgument(Args[I])); 2035 2036 // Determine whether this canonical template specialization type already 2037 // exists. 2038 llvm::FoldingSetNodeID ID; 2039 TemplateSpecializationType::Profile(ID, CanonTemplate, 2040 CanonArgs.data(), NumArgs, *this); 2041 2042 void *InsertPos = 0; 2043 TemplateSpecializationType *Spec 2044 = TemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2045 2046 if (!Spec) { 2047 // Allocate a new canonical template specialization type. 2048 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 2049 sizeof(TemplateArgument) * NumArgs), 2050 TypeAlignment); 2051 Spec = new (Mem) TemplateSpecializationType(CanonTemplate, 2052 CanonArgs.data(), NumArgs, 2053 QualType()); 2054 Types.push_back(Spec); 2055 TemplateSpecializationTypes.InsertNode(Spec, InsertPos); 2056 } 2057 2058 assert(Spec->isDependentType() && 2059 "Non-dependent template-id type must have a canonical type"); 2060 return QualType(Spec, 0); 2061} 2062 2063QualType 2064ASTContext::getElaboratedType(ElaboratedTypeKeyword Keyword, 2065 NestedNameSpecifier *NNS, 2066 QualType NamedType) { 2067 llvm::FoldingSetNodeID ID; 2068 ElaboratedType::Profile(ID, Keyword, NNS, NamedType); 2069 2070 void *InsertPos = 0; 2071 ElaboratedType *T = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2072 if (T) 2073 return QualType(T, 0); 2074 2075 QualType Canon = NamedType; 2076 if (!Canon.isCanonical()) { 2077 Canon = getCanonicalType(NamedType); 2078 ElaboratedType *CheckT = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2079 assert(!CheckT && "Elaborated canonical type broken"); 2080 (void)CheckT; 2081 } 2082 2083 T = new (*this) ElaboratedType(Keyword, NNS, NamedType, Canon); 2084 Types.push_back(T); 2085 ElaboratedTypes.InsertNode(T, InsertPos); 2086 return QualType(T, 0); 2087} 2088 2089QualType ASTContext::getDependentNameType(ElaboratedTypeKeyword Keyword, 2090 NestedNameSpecifier *NNS, 2091 const IdentifierInfo *Name, 2092 QualType Canon) { 2093 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 2094 2095 if (Canon.isNull()) { 2096 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2097 ElaboratedTypeKeyword CanonKeyword = Keyword; 2098 if (Keyword == ETK_None) 2099 CanonKeyword = ETK_Typename; 2100 2101 if (CanonNNS != NNS || CanonKeyword != Keyword) 2102 Canon = getDependentNameType(CanonKeyword, CanonNNS, Name); 2103 } 2104 2105 llvm::FoldingSetNodeID ID; 2106 DependentNameType::Profile(ID, Keyword, NNS, Name); 2107 2108 void *InsertPos = 0; 2109 DependentNameType *T 2110 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 2111 if (T) 2112 return QualType(T, 0); 2113 2114 T = new (*this) DependentNameType(Keyword, NNS, Name, Canon); 2115 Types.push_back(T); 2116 DependentNameTypes.InsertNode(T, InsertPos); 2117 return QualType(T, 0); 2118} 2119 2120QualType 2121ASTContext::getDependentTemplateSpecializationType( 2122 ElaboratedTypeKeyword Keyword, 2123 NestedNameSpecifier *NNS, 2124 const IdentifierInfo *Name, 2125 const TemplateArgumentListInfo &Args) { 2126 // TODO: avoid this copy 2127 llvm::SmallVector<TemplateArgument, 16> ArgCopy; 2128 for (unsigned I = 0, E = Args.size(); I != E; ++I) 2129 ArgCopy.push_back(Args[I].getArgument()); 2130 return getDependentTemplateSpecializationType(Keyword, NNS, Name, 2131 ArgCopy.size(), 2132 ArgCopy.data()); 2133} 2134 2135QualType 2136ASTContext::getDependentTemplateSpecializationType( 2137 ElaboratedTypeKeyword Keyword, 2138 NestedNameSpecifier *NNS, 2139 const IdentifierInfo *Name, 2140 unsigned NumArgs, 2141 const TemplateArgument *Args) { 2142 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 2143 2144 llvm::FoldingSetNodeID ID; 2145 DependentTemplateSpecializationType::Profile(ID, *this, Keyword, NNS, 2146 Name, NumArgs, Args); 2147 2148 void *InsertPos = 0; 2149 DependentTemplateSpecializationType *T 2150 = DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2151 if (T) 2152 return QualType(T, 0); 2153 2154 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2155 2156 ElaboratedTypeKeyword CanonKeyword = Keyword; 2157 if (Keyword == ETK_None) CanonKeyword = ETK_Typename; 2158 2159 bool AnyNonCanonArgs = false; 2160 llvm::SmallVector<TemplateArgument, 16> CanonArgs(NumArgs); 2161 for (unsigned I = 0; I != NumArgs; ++I) { 2162 CanonArgs[I] = getCanonicalTemplateArgument(Args[I]); 2163 if (!CanonArgs[I].structurallyEquals(Args[I])) 2164 AnyNonCanonArgs = true; 2165 } 2166 2167 QualType Canon; 2168 if (AnyNonCanonArgs || CanonNNS != NNS || CanonKeyword != Keyword) { 2169 Canon = getDependentTemplateSpecializationType(CanonKeyword, CanonNNS, 2170 Name, NumArgs, 2171 CanonArgs.data()); 2172 2173 // Find the insert position again. 2174 DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2175 } 2176 2177 void *Mem = Allocate((sizeof(DependentTemplateSpecializationType) + 2178 sizeof(TemplateArgument) * NumArgs), 2179 TypeAlignment); 2180 T = new (Mem) DependentTemplateSpecializationType(Keyword, NNS, 2181 Name, NumArgs, Args, Canon); 2182 Types.push_back(T); 2183 DependentTemplateSpecializationTypes.InsertNode(T, InsertPos); 2184 return QualType(T, 0); 2185} 2186 2187/// CmpProtocolNames - Comparison predicate for sorting protocols 2188/// alphabetically. 2189static bool CmpProtocolNames(const ObjCProtocolDecl *LHS, 2190 const ObjCProtocolDecl *RHS) { 2191 return LHS->getDeclName() < RHS->getDeclName(); 2192} 2193 2194static bool areSortedAndUniqued(ObjCProtocolDecl * const *Protocols, 2195 unsigned NumProtocols) { 2196 if (NumProtocols == 0) return true; 2197 2198 for (unsigned i = 1; i != NumProtocols; ++i) 2199 if (!CmpProtocolNames(Protocols[i-1], Protocols[i])) 2200 return false; 2201 return true; 2202} 2203 2204static void SortAndUniqueProtocols(ObjCProtocolDecl **Protocols, 2205 unsigned &NumProtocols) { 2206 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols; 2207 2208 // Sort protocols, keyed by name. 2209 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames); 2210 2211 // Remove duplicates. 2212 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd); 2213 NumProtocols = ProtocolsEnd-Protocols; 2214} 2215 2216QualType ASTContext::getObjCObjectType(QualType BaseType, 2217 ObjCProtocolDecl * const *Protocols, 2218 unsigned NumProtocols) { 2219 // If the base type is an interface and there aren't any protocols 2220 // to add, then the interface type will do just fine. 2221 if (!NumProtocols && isa<ObjCInterfaceType>(BaseType)) 2222 return BaseType; 2223 2224 // Look in the folding set for an existing type. 2225 llvm::FoldingSetNodeID ID; 2226 ObjCObjectTypeImpl::Profile(ID, BaseType, Protocols, NumProtocols); 2227 void *InsertPos = 0; 2228 if (ObjCObjectType *QT = ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos)) 2229 return QualType(QT, 0); 2230 2231 // Build the canonical type, which has the canonical base type and 2232 // a sorted-and-uniqued list of protocols. 2233 QualType Canonical; 2234 bool ProtocolsSorted = areSortedAndUniqued(Protocols, NumProtocols); 2235 if (!ProtocolsSorted || !BaseType.isCanonical()) { 2236 if (!ProtocolsSorted) { 2237 llvm::SmallVector<ObjCProtocolDecl*, 8> Sorted(Protocols, 2238 Protocols + NumProtocols); 2239 unsigned UniqueCount = NumProtocols; 2240 2241 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2242 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2243 &Sorted[0], UniqueCount); 2244 } else { 2245 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2246 Protocols, NumProtocols); 2247 } 2248 2249 // Regenerate InsertPos. 2250 ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos); 2251 } 2252 2253 unsigned Size = sizeof(ObjCObjectTypeImpl); 2254 Size += NumProtocols * sizeof(ObjCProtocolDecl *); 2255 void *Mem = Allocate(Size, TypeAlignment); 2256 ObjCObjectTypeImpl *T = 2257 new (Mem) ObjCObjectTypeImpl(Canonical, BaseType, Protocols, NumProtocols); 2258 2259 Types.push_back(T); 2260 ObjCObjectTypes.InsertNode(T, InsertPos); 2261 return QualType(T, 0); 2262} 2263 2264/// getObjCObjectPointerType - Return a ObjCObjectPointerType type for 2265/// the given object type. 2266QualType ASTContext::getObjCObjectPointerType(QualType ObjectT) { 2267 llvm::FoldingSetNodeID ID; 2268 ObjCObjectPointerType::Profile(ID, ObjectT); 2269 2270 void *InsertPos = 0; 2271 if (ObjCObjectPointerType *QT = 2272 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 2273 return QualType(QT, 0); 2274 2275 // Find the canonical object type. 2276 QualType Canonical; 2277 if (!ObjectT.isCanonical()) { 2278 Canonical = getObjCObjectPointerType(getCanonicalType(ObjectT)); 2279 2280 // Regenerate InsertPos. 2281 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 2282 } 2283 2284 // No match. 2285 void *Mem = Allocate(sizeof(ObjCObjectPointerType), TypeAlignment); 2286 ObjCObjectPointerType *QType = 2287 new (Mem) ObjCObjectPointerType(Canonical, ObjectT); 2288 2289 Types.push_back(QType); 2290 ObjCObjectPointerTypes.InsertNode(QType, InsertPos); 2291 return QualType(QType, 0); 2292} 2293 2294/// getObjCInterfaceType - Return the unique reference to the type for the 2295/// specified ObjC interface decl. The list of protocols is optional. 2296QualType ASTContext::getObjCInterfaceType(const ObjCInterfaceDecl *Decl) { 2297 if (Decl->TypeForDecl) 2298 return QualType(Decl->TypeForDecl, 0); 2299 2300 // FIXME: redeclarations? 2301 void *Mem = Allocate(sizeof(ObjCInterfaceType), TypeAlignment); 2302 ObjCInterfaceType *T = new (Mem) ObjCInterfaceType(Decl); 2303 Decl->TypeForDecl = T; 2304 Types.push_back(T); 2305 return QualType(T, 0); 2306} 2307 2308/// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique 2309/// TypeOfExprType AST's (since expression's are never shared). For example, 2310/// multiple declarations that refer to "typeof(x)" all contain different 2311/// DeclRefExpr's. This doesn't effect the type checker, since it operates 2312/// on canonical type's (which are always unique). 2313QualType ASTContext::getTypeOfExprType(Expr *tofExpr) { 2314 TypeOfExprType *toe; 2315 if (tofExpr->isTypeDependent()) { 2316 llvm::FoldingSetNodeID ID; 2317 DependentTypeOfExprType::Profile(ID, *this, tofExpr); 2318 2319 void *InsertPos = 0; 2320 DependentTypeOfExprType *Canon 2321 = DependentTypeOfExprTypes.FindNodeOrInsertPos(ID, InsertPos); 2322 if (Canon) { 2323 // We already have a "canonical" version of an identical, dependent 2324 // typeof(expr) type. Use that as our canonical type. 2325 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, 2326 QualType((TypeOfExprType*)Canon, 0)); 2327 } 2328 else { 2329 // Build a new, canonical typeof(expr) type. 2330 Canon 2331 = new (*this, TypeAlignment) DependentTypeOfExprType(*this, tofExpr); 2332 DependentTypeOfExprTypes.InsertNode(Canon, InsertPos); 2333 toe = Canon; 2334 } 2335 } else { 2336 QualType Canonical = getCanonicalType(tofExpr->getType()); 2337 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, Canonical); 2338 } 2339 Types.push_back(toe); 2340 return QualType(toe, 0); 2341} 2342 2343/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique 2344/// TypeOfType AST's. The only motivation to unique these nodes would be 2345/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be 2346/// an issue. This doesn't effect the type checker, since it operates 2347/// on canonical type's (which are always unique). 2348QualType ASTContext::getTypeOfType(QualType tofType) { 2349 QualType Canonical = getCanonicalType(tofType); 2350 TypeOfType *tot = new (*this, TypeAlignment) TypeOfType(tofType, Canonical); 2351 Types.push_back(tot); 2352 return QualType(tot, 0); 2353} 2354 2355/// getDecltypeForExpr - Given an expr, will return the decltype for that 2356/// expression, according to the rules in C++0x [dcl.type.simple]p4 2357static QualType getDecltypeForExpr(const Expr *e, ASTContext &Context) { 2358 if (e->isTypeDependent()) 2359 return Context.DependentTy; 2360 2361 // If e is an id expression or a class member access, decltype(e) is defined 2362 // as the type of the entity named by e. 2363 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(e)) { 2364 if (const ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl())) 2365 return VD->getType(); 2366 } 2367 if (const MemberExpr *ME = dyn_cast<MemberExpr>(e)) { 2368 if (const FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) 2369 return FD->getType(); 2370 } 2371 // If e is a function call or an invocation of an overloaded operator, 2372 // (parentheses around e are ignored), decltype(e) is defined as the 2373 // return type of that function. 2374 if (const CallExpr *CE = dyn_cast<CallExpr>(e->IgnoreParens())) 2375 return CE->getCallReturnType(); 2376 2377 QualType T = e->getType(); 2378 2379 // Otherwise, where T is the type of e, if e is an lvalue, decltype(e) is 2380 // defined as T&, otherwise decltype(e) is defined as T. 2381 if (e->isLvalue(Context) == Expr::LV_Valid) 2382 T = Context.getLValueReferenceType(T); 2383 2384 return T; 2385} 2386 2387/// getDecltypeType - Unlike many "get<Type>" functions, we don't unique 2388/// DecltypeType AST's. The only motivation to unique these nodes would be 2389/// memory savings. Since decltype(t) is fairly uncommon, space shouldn't be 2390/// an issue. This doesn't effect the type checker, since it operates 2391/// on canonical type's (which are always unique). 2392QualType ASTContext::getDecltypeType(Expr *e) { 2393 DecltypeType *dt; 2394 if (e->isTypeDependent()) { 2395 llvm::FoldingSetNodeID ID; 2396 DependentDecltypeType::Profile(ID, *this, e); 2397 2398 void *InsertPos = 0; 2399 DependentDecltypeType *Canon 2400 = DependentDecltypeTypes.FindNodeOrInsertPos(ID, InsertPos); 2401 if (Canon) { 2402 // We already have a "canonical" version of an equivalent, dependent 2403 // decltype type. Use that as our canonical type. 2404 dt = new (*this, TypeAlignment) DecltypeType(e, DependentTy, 2405 QualType((DecltypeType*)Canon, 0)); 2406 } 2407 else { 2408 // Build a new, canonical typeof(expr) type. 2409 Canon = new (*this, TypeAlignment) DependentDecltypeType(*this, e); 2410 DependentDecltypeTypes.InsertNode(Canon, InsertPos); 2411 dt = Canon; 2412 } 2413 } else { 2414 QualType T = getDecltypeForExpr(e, *this); 2415 dt = new (*this, TypeAlignment) DecltypeType(e, T, getCanonicalType(T)); 2416 } 2417 Types.push_back(dt); 2418 return QualType(dt, 0); 2419} 2420 2421/// getTagDeclType - Return the unique reference to the type for the 2422/// specified TagDecl (struct/union/class/enum) decl. 2423QualType ASTContext::getTagDeclType(const TagDecl *Decl) { 2424 assert (Decl); 2425 // FIXME: What is the design on getTagDeclType when it requires casting 2426 // away const? mutable? 2427 return getTypeDeclType(const_cast<TagDecl*>(Decl)); 2428} 2429 2430/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result 2431/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and 2432/// needs to agree with the definition in <stddef.h>. 2433CanQualType ASTContext::getSizeType() const { 2434 return getFromTargetType(Target.getSizeType()); 2435} 2436 2437/// getSignedWCharType - Return the type of "signed wchar_t". 2438/// Used when in C++, as a GCC extension. 2439QualType ASTContext::getSignedWCharType() const { 2440 // FIXME: derive from "Target" ? 2441 return WCharTy; 2442} 2443 2444/// getUnsignedWCharType - Return the type of "unsigned wchar_t". 2445/// Used when in C++, as a GCC extension. 2446QualType ASTContext::getUnsignedWCharType() const { 2447 // FIXME: derive from "Target" ? 2448 return UnsignedIntTy; 2449} 2450 2451/// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 2452/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 2453QualType ASTContext::getPointerDiffType() const { 2454 return getFromTargetType(Target.getPtrDiffType(0)); 2455} 2456 2457//===----------------------------------------------------------------------===// 2458// Type Operators 2459//===----------------------------------------------------------------------===// 2460 2461CanQualType ASTContext::getCanonicalParamType(QualType T) { 2462 // Push qualifiers into arrays, and then discard any remaining 2463 // qualifiers. 2464 T = getCanonicalType(T); 2465 T = getVariableArrayDecayedType(T); 2466 const Type *Ty = T.getTypePtr(); 2467 QualType Result; 2468 if (isa<ArrayType>(Ty)) { 2469 Result = getArrayDecayedType(QualType(Ty,0)); 2470 } else if (isa<FunctionType>(Ty)) { 2471 Result = getPointerType(QualType(Ty, 0)); 2472 } else { 2473 Result = QualType(Ty, 0); 2474 } 2475 2476 return CanQualType::CreateUnsafe(Result); 2477} 2478 2479/// getCanonicalType - Return the canonical (structural) type corresponding to 2480/// the specified potentially non-canonical type. The non-canonical version 2481/// of a type may have many "decorated" versions of types. Decorators can 2482/// include typedefs, 'typeof' operators, etc. The returned type is guaranteed 2483/// to be free of any of these, allowing two canonical types to be compared 2484/// for exact equality with a simple pointer comparison. 2485CanQualType ASTContext::getCanonicalType(QualType T) { 2486 QualifierCollector Quals; 2487 const Type *Ptr = Quals.strip(T); 2488 QualType CanType = Ptr->getCanonicalTypeInternal(); 2489 2490 // The canonical internal type will be the canonical type *except* 2491 // that we push type qualifiers down through array types. 2492 2493 // If there are no new qualifiers to push down, stop here. 2494 if (!Quals.hasQualifiers()) 2495 return CanQualType::CreateUnsafe(CanType); 2496 2497 // If the type qualifiers are on an array type, get the canonical 2498 // type of the array with the qualifiers applied to the element 2499 // type. 2500 ArrayType *AT = dyn_cast<ArrayType>(CanType); 2501 if (!AT) 2502 return CanQualType::CreateUnsafe(getQualifiedType(CanType, Quals)); 2503 2504 // Get the canonical version of the element with the extra qualifiers on it. 2505 // This can recursively sink qualifiers through multiple levels of arrays. 2506 QualType NewEltTy = getQualifiedType(AT->getElementType(), Quals); 2507 NewEltTy = getCanonicalType(NewEltTy); 2508 2509 if (ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 2510 return CanQualType::CreateUnsafe( 2511 getConstantArrayType(NewEltTy, CAT->getSize(), 2512 CAT->getSizeModifier(), 2513 CAT->getIndexTypeCVRQualifiers())); 2514 if (IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) 2515 return CanQualType::CreateUnsafe( 2516 getIncompleteArrayType(NewEltTy, IAT->getSizeModifier(), 2517 IAT->getIndexTypeCVRQualifiers())); 2518 2519 if (DependentSizedArrayType *DSAT = dyn_cast<DependentSizedArrayType>(AT)) 2520 return CanQualType::CreateUnsafe( 2521 getDependentSizedArrayType(NewEltTy, 2522 DSAT->getSizeExpr(), 2523 DSAT->getSizeModifier(), 2524 DSAT->getIndexTypeCVRQualifiers(), 2525 DSAT->getBracketsRange())->getCanonicalTypeInternal()); 2526 2527 VariableArrayType *VAT = cast<VariableArrayType>(AT); 2528 return CanQualType::CreateUnsafe(getVariableArrayType(NewEltTy, 2529 VAT->getSizeExpr(), 2530 VAT->getSizeModifier(), 2531 VAT->getIndexTypeCVRQualifiers(), 2532 VAT->getBracketsRange())); 2533} 2534 2535QualType ASTContext::getUnqualifiedArrayType(QualType T, 2536 Qualifiers &Quals) { 2537 Quals = T.getQualifiers(); 2538 const ArrayType *AT = getAsArrayType(T); 2539 if (!AT) { 2540 return T.getUnqualifiedType(); 2541 } 2542 2543 QualType Elt = AT->getElementType(); 2544 QualType UnqualElt = getUnqualifiedArrayType(Elt, Quals); 2545 if (Elt == UnqualElt) 2546 return T; 2547 2548 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) { 2549 return getConstantArrayType(UnqualElt, CAT->getSize(), 2550 CAT->getSizeModifier(), 0); 2551 } 2552 2553 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) { 2554 return getIncompleteArrayType(UnqualElt, IAT->getSizeModifier(), 0); 2555 } 2556 2557 if (const VariableArrayType *VAT = dyn_cast<VariableArrayType>(AT)) { 2558 return getVariableArrayType(UnqualElt, 2559 VAT->getSizeExpr(), 2560 VAT->getSizeModifier(), 2561 VAT->getIndexTypeCVRQualifiers(), 2562 VAT->getBracketsRange()); 2563 } 2564 2565 const DependentSizedArrayType *DSAT = cast<DependentSizedArrayType>(AT); 2566 return getDependentSizedArrayType(UnqualElt, DSAT->getSizeExpr(), 2567 DSAT->getSizeModifier(), 0, 2568 SourceRange()); 2569} 2570 2571/// UnwrapSimilarPointerTypes - If T1 and T2 are pointer types that 2572/// may be similar (C++ 4.4), replaces T1 and T2 with the type that 2573/// they point to and return true. If T1 and T2 aren't pointer types 2574/// or pointer-to-member types, or if they are not similar at this 2575/// level, returns false and leaves T1 and T2 unchanged. Top-level 2576/// qualifiers on T1 and T2 are ignored. This function will typically 2577/// be called in a loop that successively "unwraps" pointer and 2578/// pointer-to-member types to compare them at each level. 2579bool ASTContext::UnwrapSimilarPointerTypes(QualType &T1, QualType &T2) { 2580 const PointerType *T1PtrType = T1->getAs<PointerType>(), 2581 *T2PtrType = T2->getAs<PointerType>(); 2582 if (T1PtrType && T2PtrType) { 2583 T1 = T1PtrType->getPointeeType(); 2584 T2 = T2PtrType->getPointeeType(); 2585 return true; 2586 } 2587 2588 const MemberPointerType *T1MPType = T1->getAs<MemberPointerType>(), 2589 *T2MPType = T2->getAs<MemberPointerType>(); 2590 if (T1MPType && T2MPType && 2591 hasSameUnqualifiedType(QualType(T1MPType->getClass(), 0), 2592 QualType(T2MPType->getClass(), 0))) { 2593 T1 = T1MPType->getPointeeType(); 2594 T2 = T2MPType->getPointeeType(); 2595 return true; 2596 } 2597 2598 if (getLangOptions().ObjC1) { 2599 const ObjCObjectPointerType *T1OPType = T1->getAs<ObjCObjectPointerType>(), 2600 *T2OPType = T2->getAs<ObjCObjectPointerType>(); 2601 if (T1OPType && T2OPType) { 2602 T1 = T1OPType->getPointeeType(); 2603 T2 = T2OPType->getPointeeType(); 2604 return true; 2605 } 2606 } 2607 2608 // FIXME: Block pointers, too? 2609 2610 return false; 2611} 2612 2613DeclarationNameInfo ASTContext::getNameForTemplate(TemplateName Name, 2614 SourceLocation NameLoc) { 2615 if (TemplateDecl *TD = Name.getAsTemplateDecl()) 2616 // DNInfo work in progress: CHECKME: what about DNLoc? 2617 return DeclarationNameInfo(TD->getDeclName(), NameLoc); 2618 2619 if (DependentTemplateName *DTN = Name.getAsDependentTemplateName()) { 2620 DeclarationName DName; 2621 if (DTN->isIdentifier()) { 2622 DName = DeclarationNames.getIdentifier(DTN->getIdentifier()); 2623 return DeclarationNameInfo(DName, NameLoc); 2624 } else { 2625 DName = DeclarationNames.getCXXOperatorName(DTN->getOperator()); 2626 // DNInfo work in progress: FIXME: source locations? 2627 DeclarationNameLoc DNLoc; 2628 DNLoc.CXXOperatorName.BeginOpNameLoc = SourceLocation().getRawEncoding(); 2629 DNLoc.CXXOperatorName.EndOpNameLoc = SourceLocation().getRawEncoding(); 2630 return DeclarationNameInfo(DName, NameLoc, DNLoc); 2631 } 2632 } 2633 2634 OverloadedTemplateStorage *Storage = Name.getAsOverloadedTemplate(); 2635 assert(Storage); 2636 // DNInfo work in progress: CHECKME: what about DNLoc? 2637 return DeclarationNameInfo((*Storage->begin())->getDeclName(), NameLoc); 2638} 2639 2640TemplateName ASTContext::getCanonicalTemplateName(TemplateName Name) { 2641 if (TemplateDecl *Template = Name.getAsTemplateDecl()) { 2642 if (TemplateTemplateParmDecl *TTP 2643 = dyn_cast<TemplateTemplateParmDecl>(Template)) 2644 Template = getCanonicalTemplateTemplateParmDecl(TTP); 2645 2646 // The canonical template name is the canonical template declaration. 2647 return TemplateName(cast<TemplateDecl>(Template->getCanonicalDecl())); 2648 } 2649 2650 assert(!Name.getAsOverloadedTemplate()); 2651 2652 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 2653 assert(DTN && "Non-dependent template names must refer to template decls."); 2654 return DTN->CanonicalTemplateName; 2655} 2656 2657bool ASTContext::hasSameTemplateName(TemplateName X, TemplateName Y) { 2658 X = getCanonicalTemplateName(X); 2659 Y = getCanonicalTemplateName(Y); 2660 return X.getAsVoidPointer() == Y.getAsVoidPointer(); 2661} 2662 2663TemplateArgument 2664ASTContext::getCanonicalTemplateArgument(const TemplateArgument &Arg) { 2665 switch (Arg.getKind()) { 2666 case TemplateArgument::Null: 2667 return Arg; 2668 2669 case TemplateArgument::Expression: 2670 return Arg; 2671 2672 case TemplateArgument::Declaration: 2673 return TemplateArgument(Arg.getAsDecl()->getCanonicalDecl()); 2674 2675 case TemplateArgument::Template: 2676 return TemplateArgument(getCanonicalTemplateName(Arg.getAsTemplate())); 2677 2678 case TemplateArgument::Integral: 2679 return TemplateArgument(*Arg.getAsIntegral(), 2680 getCanonicalType(Arg.getIntegralType())); 2681 2682 case TemplateArgument::Type: 2683 return TemplateArgument(getCanonicalType(Arg.getAsType())); 2684 2685 case TemplateArgument::Pack: { 2686 TemplateArgument *CanonArgs 2687 = new (*this) TemplateArgument[Arg.pack_size()]; 2688 unsigned Idx = 0; 2689 for (TemplateArgument::pack_iterator A = Arg.pack_begin(), 2690 AEnd = Arg.pack_end(); 2691 A != AEnd; (void)++A, ++Idx) 2692 CanonArgs[Idx] = getCanonicalTemplateArgument(*A); 2693 2694 return TemplateArgument(CanonArgs, Arg.pack_size()); 2695 } 2696 } 2697 2698 // Silence GCC warning 2699 assert(false && "Unhandled template argument kind"); 2700 return TemplateArgument(); 2701} 2702 2703NestedNameSpecifier * 2704ASTContext::getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) { 2705 if (!NNS) 2706 return 0; 2707 2708 switch (NNS->getKind()) { 2709 case NestedNameSpecifier::Identifier: 2710 // Canonicalize the prefix but keep the identifier the same. 2711 return NestedNameSpecifier::Create(*this, 2712 getCanonicalNestedNameSpecifier(NNS->getPrefix()), 2713 NNS->getAsIdentifier()); 2714 2715 case NestedNameSpecifier::Namespace: 2716 // A namespace is canonical; build a nested-name-specifier with 2717 // this namespace and no prefix. 2718 return NestedNameSpecifier::Create(*this, 0, NNS->getAsNamespace()); 2719 2720 case NestedNameSpecifier::TypeSpec: 2721 case NestedNameSpecifier::TypeSpecWithTemplate: { 2722 QualType T = getCanonicalType(QualType(NNS->getAsType(), 0)); 2723 2724 // If we have some kind of dependent-named type (e.g., "typename T::type"), 2725 // break it apart into its prefix and identifier, then reconsititute those 2726 // as the canonical nested-name-specifier. This is required to canonicalize 2727 // a dependent nested-name-specifier involving typedefs of dependent-name 2728 // types, e.g., 2729 // typedef typename T::type T1; 2730 // typedef typename T1::type T2; 2731 if (const DependentNameType *DNT = T->getAs<DependentNameType>()) { 2732 NestedNameSpecifier *Prefix 2733 = getCanonicalNestedNameSpecifier(DNT->getQualifier()); 2734 return NestedNameSpecifier::Create(*this, Prefix, 2735 const_cast<IdentifierInfo *>(DNT->getIdentifier())); 2736 } 2737 2738 // Do the same thing as above, but with dependent-named specializations. 2739 if (const DependentTemplateSpecializationType *DTST 2740 = T->getAs<DependentTemplateSpecializationType>()) { 2741 NestedNameSpecifier *Prefix 2742 = getCanonicalNestedNameSpecifier(DTST->getQualifier()); 2743 TemplateName Name 2744 = getDependentTemplateName(Prefix, DTST->getIdentifier()); 2745 T = getTemplateSpecializationType(Name, 2746 DTST->getArgs(), DTST->getNumArgs()); 2747 T = getCanonicalType(T); 2748 } 2749 2750 return NestedNameSpecifier::Create(*this, 0, false, T.getTypePtr()); 2751 } 2752 2753 case NestedNameSpecifier::Global: 2754 // The global specifier is canonical and unique. 2755 return NNS; 2756 } 2757 2758 // Required to silence a GCC warning 2759 return 0; 2760} 2761 2762 2763const ArrayType *ASTContext::getAsArrayType(QualType T) { 2764 // Handle the non-qualified case efficiently. 2765 if (!T.hasLocalQualifiers()) { 2766 // Handle the common positive case fast. 2767 if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 2768 return AT; 2769 } 2770 2771 // Handle the common negative case fast. 2772 QualType CType = T->getCanonicalTypeInternal(); 2773 if (!isa<ArrayType>(CType)) 2774 return 0; 2775 2776 // Apply any qualifiers from the array type to the element type. This 2777 // implements C99 6.7.3p8: "If the specification of an array type includes 2778 // any type qualifiers, the element type is so qualified, not the array type." 2779 2780 // If we get here, we either have type qualifiers on the type, or we have 2781 // sugar such as a typedef in the way. If we have type qualifiers on the type 2782 // we must propagate them down into the element type. 2783 2784 QualifierCollector Qs; 2785 const Type *Ty = Qs.strip(T.getDesugaredType()); 2786 2787 // If we have a simple case, just return now. 2788 const ArrayType *ATy = dyn_cast<ArrayType>(Ty); 2789 if (ATy == 0 || Qs.empty()) 2790 return ATy; 2791 2792 // Otherwise, we have an array and we have qualifiers on it. Push the 2793 // qualifiers into the array element type and return a new array type. 2794 // Get the canonical version of the element with the extra qualifiers on it. 2795 // This can recursively sink qualifiers through multiple levels of arrays. 2796 QualType NewEltTy = getQualifiedType(ATy->getElementType(), Qs); 2797 2798 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy)) 2799 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(), 2800 CAT->getSizeModifier(), 2801 CAT->getIndexTypeCVRQualifiers())); 2802 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy)) 2803 return cast<ArrayType>(getIncompleteArrayType(NewEltTy, 2804 IAT->getSizeModifier(), 2805 IAT->getIndexTypeCVRQualifiers())); 2806 2807 if (const DependentSizedArrayType *DSAT 2808 = dyn_cast<DependentSizedArrayType>(ATy)) 2809 return cast<ArrayType>( 2810 getDependentSizedArrayType(NewEltTy, 2811 DSAT->getSizeExpr(), 2812 DSAT->getSizeModifier(), 2813 DSAT->getIndexTypeCVRQualifiers(), 2814 DSAT->getBracketsRange())); 2815 2816 const VariableArrayType *VAT = cast<VariableArrayType>(ATy); 2817 return cast<ArrayType>(getVariableArrayType(NewEltTy, 2818 VAT->getSizeExpr(), 2819 VAT->getSizeModifier(), 2820 VAT->getIndexTypeCVRQualifiers(), 2821 VAT->getBracketsRange())); 2822} 2823 2824/// getArrayDecayedType - Return the properly qualified result of decaying the 2825/// specified array type to a pointer. This operation is non-trivial when 2826/// handling typedefs etc. The canonical type of "T" must be an array type, 2827/// this returns a pointer to a properly qualified element of the array. 2828/// 2829/// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 2830QualType ASTContext::getArrayDecayedType(QualType Ty) { 2831 // Get the element type with 'getAsArrayType' so that we don't lose any 2832 // typedefs in the element type of the array. This also handles propagation 2833 // of type qualifiers from the array type into the element type if present 2834 // (C99 6.7.3p8). 2835 const ArrayType *PrettyArrayType = getAsArrayType(Ty); 2836 assert(PrettyArrayType && "Not an array type!"); 2837 2838 QualType PtrTy = getPointerType(PrettyArrayType->getElementType()); 2839 2840 // int x[restrict 4] -> int *restrict 2841 return getQualifiedType(PtrTy, PrettyArrayType->getIndexTypeQualifiers()); 2842} 2843 2844QualType ASTContext::getBaseElementType(QualType QT) { 2845 QualifierCollector Qs; 2846 while (const ArrayType *AT = getAsArrayType(QualType(Qs.strip(QT), 0))) 2847 QT = AT->getElementType(); 2848 return Qs.apply(QT); 2849} 2850 2851QualType ASTContext::getBaseElementType(const ArrayType *AT) { 2852 QualType ElemTy = AT->getElementType(); 2853 2854 if (const ArrayType *AT = getAsArrayType(ElemTy)) 2855 return getBaseElementType(AT); 2856 2857 return ElemTy; 2858} 2859 2860/// getConstantArrayElementCount - Returns number of constant array elements. 2861uint64_t 2862ASTContext::getConstantArrayElementCount(const ConstantArrayType *CA) const { 2863 uint64_t ElementCount = 1; 2864 do { 2865 ElementCount *= CA->getSize().getZExtValue(); 2866 CA = dyn_cast<ConstantArrayType>(CA->getElementType()); 2867 } while (CA); 2868 return ElementCount; 2869} 2870 2871/// getFloatingRank - Return a relative rank for floating point types. 2872/// This routine will assert if passed a built-in type that isn't a float. 2873static FloatingRank getFloatingRank(QualType T) { 2874 if (const ComplexType *CT = T->getAs<ComplexType>()) 2875 return getFloatingRank(CT->getElementType()); 2876 2877 assert(T->getAs<BuiltinType>() && "getFloatingRank(): not a floating type"); 2878 switch (T->getAs<BuiltinType>()->getKind()) { 2879 default: assert(0 && "getFloatingRank(): not a floating type"); 2880 case BuiltinType::Float: return FloatRank; 2881 case BuiltinType::Double: return DoubleRank; 2882 case BuiltinType::LongDouble: return LongDoubleRank; 2883 } 2884} 2885 2886/// getFloatingTypeOfSizeWithinDomain - Returns a real floating 2887/// point or a complex type (based on typeDomain/typeSize). 2888/// 'typeDomain' is a real floating point or complex type. 2889/// 'typeSize' is a real floating point or complex type. 2890QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size, 2891 QualType Domain) const { 2892 FloatingRank EltRank = getFloatingRank(Size); 2893 if (Domain->isComplexType()) { 2894 switch (EltRank) { 2895 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2896 case FloatRank: return FloatComplexTy; 2897 case DoubleRank: return DoubleComplexTy; 2898 case LongDoubleRank: return LongDoubleComplexTy; 2899 } 2900 } 2901 2902 assert(Domain->isRealFloatingType() && "Unknown domain!"); 2903 switch (EltRank) { 2904 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2905 case FloatRank: return FloatTy; 2906 case DoubleRank: return DoubleTy; 2907 case LongDoubleRank: return LongDoubleTy; 2908 } 2909} 2910 2911/// getFloatingTypeOrder - Compare the rank of the two specified floating 2912/// point types, ignoring the domain of the type (i.e. 'double' == 2913/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 2914/// LHS < RHS, return -1. 2915int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) { 2916 FloatingRank LHSR = getFloatingRank(LHS); 2917 FloatingRank RHSR = getFloatingRank(RHS); 2918 2919 if (LHSR == RHSR) 2920 return 0; 2921 if (LHSR > RHSR) 2922 return 1; 2923 return -1; 2924} 2925 2926/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This 2927/// routine will assert if passed a built-in type that isn't an integer or enum, 2928/// or if it is not canonicalized. 2929unsigned ASTContext::getIntegerRank(Type *T) { 2930 assert(T->isCanonicalUnqualified() && "T should be canonicalized"); 2931 if (EnumType* ET = dyn_cast<EnumType>(T)) 2932 T = ET->getDecl()->getPromotionType().getTypePtr(); 2933 2934 if (T->isSpecificBuiltinType(BuiltinType::WChar)) 2935 T = getFromTargetType(Target.getWCharType()).getTypePtr(); 2936 2937 if (T->isSpecificBuiltinType(BuiltinType::Char16)) 2938 T = getFromTargetType(Target.getChar16Type()).getTypePtr(); 2939 2940 if (T->isSpecificBuiltinType(BuiltinType::Char32)) 2941 T = getFromTargetType(Target.getChar32Type()).getTypePtr(); 2942 2943 switch (cast<BuiltinType>(T)->getKind()) { 2944 default: assert(0 && "getIntegerRank(): not a built-in integer"); 2945 case BuiltinType::Bool: 2946 return 1 + (getIntWidth(BoolTy) << 3); 2947 case BuiltinType::Char_S: 2948 case BuiltinType::Char_U: 2949 case BuiltinType::SChar: 2950 case BuiltinType::UChar: 2951 return 2 + (getIntWidth(CharTy) << 3); 2952 case BuiltinType::Short: 2953 case BuiltinType::UShort: 2954 return 3 + (getIntWidth(ShortTy) << 3); 2955 case BuiltinType::Int: 2956 case BuiltinType::UInt: 2957 return 4 + (getIntWidth(IntTy) << 3); 2958 case BuiltinType::Long: 2959 case BuiltinType::ULong: 2960 return 5 + (getIntWidth(LongTy) << 3); 2961 case BuiltinType::LongLong: 2962 case BuiltinType::ULongLong: 2963 return 6 + (getIntWidth(LongLongTy) << 3); 2964 case BuiltinType::Int128: 2965 case BuiltinType::UInt128: 2966 return 7 + (getIntWidth(Int128Ty) << 3); 2967 } 2968} 2969 2970/// \brief Whether this is a promotable bitfield reference according 2971/// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 2972/// 2973/// \returns the type this bit-field will promote to, or NULL if no 2974/// promotion occurs. 2975QualType ASTContext::isPromotableBitField(Expr *E) { 2976 if (E->isTypeDependent() || E->isValueDependent()) 2977 return QualType(); 2978 2979 FieldDecl *Field = E->getBitField(); 2980 if (!Field) 2981 return QualType(); 2982 2983 QualType FT = Field->getType(); 2984 2985 llvm::APSInt BitWidthAP = Field->getBitWidth()->EvaluateAsInt(*this); 2986 uint64_t BitWidth = BitWidthAP.getZExtValue(); 2987 uint64_t IntSize = getTypeSize(IntTy); 2988 // GCC extension compatibility: if the bit-field size is less than or equal 2989 // to the size of int, it gets promoted no matter what its type is. 2990 // For instance, unsigned long bf : 4 gets promoted to signed int. 2991 if (BitWidth < IntSize) 2992 return IntTy; 2993 2994 if (BitWidth == IntSize) 2995 return FT->isSignedIntegerType() ? IntTy : UnsignedIntTy; 2996 2997 // Types bigger than int are not subject to promotions, and therefore act 2998 // like the base type. 2999 // FIXME: This doesn't quite match what gcc does, but what gcc does here 3000 // is ridiculous. 3001 return QualType(); 3002} 3003 3004/// getPromotedIntegerType - Returns the type that Promotable will 3005/// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 3006/// integer type. 3007QualType ASTContext::getPromotedIntegerType(QualType Promotable) { 3008 assert(!Promotable.isNull()); 3009 assert(Promotable->isPromotableIntegerType()); 3010 if (const EnumType *ET = Promotable->getAs<EnumType>()) 3011 return ET->getDecl()->getPromotionType(); 3012 if (Promotable->isSignedIntegerType()) 3013 return IntTy; 3014 uint64_t PromotableSize = getTypeSize(Promotable); 3015 uint64_t IntSize = getTypeSize(IntTy); 3016 assert(Promotable->isUnsignedIntegerType() && PromotableSize <= IntSize); 3017 return (PromotableSize != IntSize) ? IntTy : UnsignedIntTy; 3018} 3019 3020/// getIntegerTypeOrder - Returns the highest ranked integer type: 3021/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 3022/// LHS < RHS, return -1. 3023int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) { 3024 Type *LHSC = getCanonicalType(LHS).getTypePtr(); 3025 Type *RHSC = getCanonicalType(RHS).getTypePtr(); 3026 if (LHSC == RHSC) return 0; 3027 3028 bool LHSUnsigned = LHSC->isUnsignedIntegerType(); 3029 bool RHSUnsigned = RHSC->isUnsignedIntegerType(); 3030 3031 unsigned LHSRank = getIntegerRank(LHSC); 3032 unsigned RHSRank = getIntegerRank(RHSC); 3033 3034 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned. 3035 if (LHSRank == RHSRank) return 0; 3036 return LHSRank > RHSRank ? 1 : -1; 3037 } 3038 3039 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa. 3040 if (LHSUnsigned) { 3041 // If the unsigned [LHS] type is larger, return it. 3042 if (LHSRank >= RHSRank) 3043 return 1; 3044 3045 // If the signed type can represent all values of the unsigned type, it 3046 // wins. Because we are dealing with 2's complement and types that are 3047 // powers of two larger than each other, this is always safe. 3048 return -1; 3049 } 3050 3051 // If the unsigned [RHS] type is larger, return it. 3052 if (RHSRank >= LHSRank) 3053 return -1; 3054 3055 // If the signed type can represent all values of the unsigned type, it 3056 // wins. Because we are dealing with 2's complement and types that are 3057 // powers of two larger than each other, this is always safe. 3058 return 1; 3059} 3060 3061static RecordDecl * 3062CreateRecordDecl(ASTContext &Ctx, RecordDecl::TagKind TK, DeclContext *DC, 3063 SourceLocation L, IdentifierInfo *Id) { 3064 if (Ctx.getLangOptions().CPlusPlus) 3065 return CXXRecordDecl::Create(Ctx, TK, DC, L, Id); 3066 else 3067 return RecordDecl::Create(Ctx, TK, DC, L, Id); 3068} 3069 3070// getCFConstantStringType - Return the type used for constant CFStrings. 3071QualType ASTContext::getCFConstantStringType() { 3072 if (!CFConstantStringTypeDecl) { 3073 CFConstantStringTypeDecl = 3074 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3075 &Idents.get("NSConstantString")); 3076 CFConstantStringTypeDecl->startDefinition(); 3077 3078 QualType FieldTypes[4]; 3079 3080 // const int *isa; 3081 FieldTypes[0] = getPointerType(IntTy.withConst()); 3082 // int flags; 3083 FieldTypes[1] = IntTy; 3084 // const char *str; 3085 FieldTypes[2] = getPointerType(CharTy.withConst()); 3086 // long length; 3087 FieldTypes[3] = LongTy; 3088 3089 // Create fields 3090 for (unsigned i = 0; i < 4; ++i) { 3091 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl, 3092 SourceLocation(), 0, 3093 FieldTypes[i], /*TInfo=*/0, 3094 /*BitWidth=*/0, 3095 /*Mutable=*/false); 3096 Field->setAccess(AS_public); 3097 CFConstantStringTypeDecl->addDecl(Field); 3098 } 3099 3100 CFConstantStringTypeDecl->completeDefinition(); 3101 } 3102 3103 return getTagDeclType(CFConstantStringTypeDecl); 3104} 3105 3106void ASTContext::setCFConstantStringType(QualType T) { 3107 const RecordType *Rec = T->getAs<RecordType>(); 3108 assert(Rec && "Invalid CFConstantStringType"); 3109 CFConstantStringTypeDecl = Rec->getDecl(); 3110} 3111 3112// getNSConstantStringType - Return the type used for constant NSStrings. 3113QualType ASTContext::getNSConstantStringType() { 3114 if (!NSConstantStringTypeDecl) { 3115 NSConstantStringTypeDecl = 3116 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3117 &Idents.get("__builtin_NSString")); 3118 NSConstantStringTypeDecl->startDefinition(); 3119 3120 QualType FieldTypes[3]; 3121 3122 // const int *isa; 3123 FieldTypes[0] = getPointerType(IntTy.withConst()); 3124 // const char *str; 3125 FieldTypes[1] = getPointerType(CharTy.withConst()); 3126 // unsigned int length; 3127 FieldTypes[2] = UnsignedIntTy; 3128 3129 // Create fields 3130 for (unsigned i = 0; i < 3; ++i) { 3131 FieldDecl *Field = FieldDecl::Create(*this, NSConstantStringTypeDecl, 3132 SourceLocation(), 0, 3133 FieldTypes[i], /*TInfo=*/0, 3134 /*BitWidth=*/0, 3135 /*Mutable=*/false); 3136 Field->setAccess(AS_public); 3137 NSConstantStringTypeDecl->addDecl(Field); 3138 } 3139 3140 NSConstantStringTypeDecl->completeDefinition(); 3141 } 3142 3143 return getTagDeclType(NSConstantStringTypeDecl); 3144} 3145 3146void ASTContext::setNSConstantStringType(QualType T) { 3147 const RecordType *Rec = T->getAs<RecordType>(); 3148 assert(Rec && "Invalid NSConstantStringType"); 3149 NSConstantStringTypeDecl = Rec->getDecl(); 3150} 3151 3152QualType ASTContext::getObjCFastEnumerationStateType() { 3153 if (!ObjCFastEnumerationStateTypeDecl) { 3154 ObjCFastEnumerationStateTypeDecl = 3155 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3156 &Idents.get("__objcFastEnumerationState")); 3157 ObjCFastEnumerationStateTypeDecl->startDefinition(); 3158 3159 QualType FieldTypes[] = { 3160 UnsignedLongTy, 3161 getPointerType(ObjCIdTypedefType), 3162 getPointerType(UnsignedLongTy), 3163 getConstantArrayType(UnsignedLongTy, 3164 llvm::APInt(32, 5), ArrayType::Normal, 0) 3165 }; 3166 3167 for (size_t i = 0; i < 4; ++i) { 3168 FieldDecl *Field = FieldDecl::Create(*this, 3169 ObjCFastEnumerationStateTypeDecl, 3170 SourceLocation(), 0, 3171 FieldTypes[i], /*TInfo=*/0, 3172 /*BitWidth=*/0, 3173 /*Mutable=*/false); 3174 Field->setAccess(AS_public); 3175 ObjCFastEnumerationStateTypeDecl->addDecl(Field); 3176 } 3177 3178 ObjCFastEnumerationStateTypeDecl->completeDefinition(); 3179 } 3180 3181 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 3182} 3183 3184QualType ASTContext::getBlockDescriptorType() { 3185 if (BlockDescriptorType) 3186 return getTagDeclType(BlockDescriptorType); 3187 3188 RecordDecl *T; 3189 // FIXME: Needs the FlagAppleBlock bit. 3190 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3191 &Idents.get("__block_descriptor")); 3192 T->startDefinition(); 3193 3194 QualType FieldTypes[] = { 3195 UnsignedLongTy, 3196 UnsignedLongTy, 3197 }; 3198 3199 const char *FieldNames[] = { 3200 "reserved", 3201 "Size" 3202 }; 3203 3204 for (size_t i = 0; i < 2; ++i) { 3205 FieldDecl *Field = FieldDecl::Create(*this, 3206 T, 3207 SourceLocation(), 3208 &Idents.get(FieldNames[i]), 3209 FieldTypes[i], /*TInfo=*/0, 3210 /*BitWidth=*/0, 3211 /*Mutable=*/false); 3212 Field->setAccess(AS_public); 3213 T->addDecl(Field); 3214 } 3215 3216 T->completeDefinition(); 3217 3218 BlockDescriptorType = T; 3219 3220 return getTagDeclType(BlockDescriptorType); 3221} 3222 3223void ASTContext::setBlockDescriptorType(QualType T) { 3224 const RecordType *Rec = T->getAs<RecordType>(); 3225 assert(Rec && "Invalid BlockDescriptorType"); 3226 BlockDescriptorType = Rec->getDecl(); 3227} 3228 3229QualType ASTContext::getBlockDescriptorExtendedType() { 3230 if (BlockDescriptorExtendedType) 3231 return getTagDeclType(BlockDescriptorExtendedType); 3232 3233 RecordDecl *T; 3234 // FIXME: Needs the FlagAppleBlock bit. 3235 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3236 &Idents.get("__block_descriptor_withcopydispose")); 3237 T->startDefinition(); 3238 3239 QualType FieldTypes[] = { 3240 UnsignedLongTy, 3241 UnsignedLongTy, 3242 getPointerType(VoidPtrTy), 3243 getPointerType(VoidPtrTy) 3244 }; 3245 3246 const char *FieldNames[] = { 3247 "reserved", 3248 "Size", 3249 "CopyFuncPtr", 3250 "DestroyFuncPtr" 3251 }; 3252 3253 for (size_t i = 0; i < 4; ++i) { 3254 FieldDecl *Field = FieldDecl::Create(*this, 3255 T, 3256 SourceLocation(), 3257 &Idents.get(FieldNames[i]), 3258 FieldTypes[i], /*TInfo=*/0, 3259 /*BitWidth=*/0, 3260 /*Mutable=*/false); 3261 Field->setAccess(AS_public); 3262 T->addDecl(Field); 3263 } 3264 3265 T->completeDefinition(); 3266 3267 BlockDescriptorExtendedType = T; 3268 3269 return getTagDeclType(BlockDescriptorExtendedType); 3270} 3271 3272void ASTContext::setBlockDescriptorExtendedType(QualType T) { 3273 const RecordType *Rec = T->getAs<RecordType>(); 3274 assert(Rec && "Invalid BlockDescriptorType"); 3275 BlockDescriptorExtendedType = Rec->getDecl(); 3276} 3277 3278bool ASTContext::BlockRequiresCopying(QualType Ty) { 3279 if (Ty->isBlockPointerType()) 3280 return true; 3281 if (isObjCNSObjectType(Ty)) 3282 return true; 3283 if (Ty->isObjCObjectPointerType()) 3284 return true; 3285 return false; 3286} 3287 3288QualType ASTContext::BuildByRefType(llvm::StringRef DeclName, QualType Ty) { 3289 // type = struct __Block_byref_1_X { 3290 // void *__isa; 3291 // struct __Block_byref_1_X *__forwarding; 3292 // unsigned int __flags; 3293 // unsigned int __size; 3294 // void *__copy_helper; // as needed 3295 // void *__destroy_help // as needed 3296 // int X; 3297 // } * 3298 3299 bool HasCopyAndDispose = BlockRequiresCopying(Ty); 3300 3301 // FIXME: Move up 3302 llvm::SmallString<36> Name; 3303 llvm::raw_svector_ostream(Name) << "__Block_byref_" << 3304 ++UniqueBlockByRefTypeID << '_' << DeclName; 3305 RecordDecl *T; 3306 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3307 &Idents.get(Name.str())); 3308 T->startDefinition(); 3309 QualType Int32Ty = IntTy; 3310 assert(getIntWidth(IntTy) == 32 && "non-32bit int not supported"); 3311 QualType FieldTypes[] = { 3312 getPointerType(VoidPtrTy), 3313 getPointerType(getTagDeclType(T)), 3314 Int32Ty, 3315 Int32Ty, 3316 getPointerType(VoidPtrTy), 3317 getPointerType(VoidPtrTy), 3318 Ty 3319 }; 3320 3321 llvm::StringRef FieldNames[] = { 3322 "__isa", 3323 "__forwarding", 3324 "__flags", 3325 "__size", 3326 "__copy_helper", 3327 "__destroy_helper", 3328 DeclName, 3329 }; 3330 3331 for (size_t i = 0; i < 7; ++i) { 3332 if (!HasCopyAndDispose && i >=4 && i <= 5) 3333 continue; 3334 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3335 &Idents.get(FieldNames[i]), 3336 FieldTypes[i], /*TInfo=*/0, 3337 /*BitWidth=*/0, /*Mutable=*/false); 3338 Field->setAccess(AS_public); 3339 T->addDecl(Field); 3340 } 3341 3342 T->completeDefinition(); 3343 3344 return getPointerType(getTagDeclType(T)); 3345} 3346 3347 3348QualType ASTContext::getBlockParmType( 3349 bool BlockHasCopyDispose, 3350 llvm::SmallVectorImpl<const Expr *> &Layout) { 3351 3352 // FIXME: Move up 3353 llvm::SmallString<36> Name; 3354 llvm::raw_svector_ostream(Name) << "__block_literal_" 3355 << ++UniqueBlockParmTypeID; 3356 RecordDecl *T; 3357 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3358 &Idents.get(Name.str())); 3359 T->startDefinition(); 3360 QualType FieldTypes[] = { 3361 getPointerType(VoidPtrTy), 3362 IntTy, 3363 IntTy, 3364 getPointerType(VoidPtrTy), 3365 (BlockHasCopyDispose ? 3366 getPointerType(getBlockDescriptorExtendedType()) : 3367 getPointerType(getBlockDescriptorType())) 3368 }; 3369 3370 const char *FieldNames[] = { 3371 "__isa", 3372 "__flags", 3373 "__reserved", 3374 "__FuncPtr", 3375 "__descriptor" 3376 }; 3377 3378 for (size_t i = 0; i < 5; ++i) { 3379 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3380 &Idents.get(FieldNames[i]), 3381 FieldTypes[i], /*TInfo=*/0, 3382 /*BitWidth=*/0, /*Mutable=*/false); 3383 Field->setAccess(AS_public); 3384 T->addDecl(Field); 3385 } 3386 3387 for (unsigned i = 0; i < Layout.size(); ++i) { 3388 const Expr *E = Layout[i]; 3389 3390 QualType FieldType = E->getType(); 3391 IdentifierInfo *FieldName = 0; 3392 if (isa<CXXThisExpr>(E)) { 3393 FieldName = &Idents.get("this"); 3394 } else if (const BlockDeclRefExpr *BDRE = dyn_cast<BlockDeclRefExpr>(E)) { 3395 const ValueDecl *D = BDRE->getDecl(); 3396 FieldName = D->getIdentifier(); 3397 if (BDRE->isByRef()) 3398 FieldType = BuildByRefType(D->getName(), FieldType); 3399 } else { 3400 // Padding. 3401 assert(isa<ConstantArrayType>(FieldType) && 3402 isa<DeclRefExpr>(E) && 3403 !cast<DeclRefExpr>(E)->getDecl()->getDeclName() && 3404 "doesn't match characteristics of padding decl"); 3405 } 3406 3407 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3408 FieldName, FieldType, /*TInfo=*/0, 3409 /*BitWidth=*/0, /*Mutable=*/false); 3410 Field->setAccess(AS_public); 3411 T->addDecl(Field); 3412 } 3413 3414 T->completeDefinition(); 3415 3416 return getPointerType(getTagDeclType(T)); 3417} 3418 3419void ASTContext::setObjCFastEnumerationStateType(QualType T) { 3420 const RecordType *Rec = T->getAs<RecordType>(); 3421 assert(Rec && "Invalid ObjCFAstEnumerationStateType"); 3422 ObjCFastEnumerationStateTypeDecl = Rec->getDecl(); 3423} 3424 3425// This returns true if a type has been typedefed to BOOL: 3426// typedef <type> BOOL; 3427static bool isTypeTypedefedAsBOOL(QualType T) { 3428 if (const TypedefType *TT = dyn_cast<TypedefType>(T)) 3429 if (IdentifierInfo *II = TT->getDecl()->getIdentifier()) 3430 return II->isStr("BOOL"); 3431 3432 return false; 3433} 3434 3435/// getObjCEncodingTypeSize returns size of type for objective-c encoding 3436/// purpose. 3437CharUnits ASTContext::getObjCEncodingTypeSize(QualType type) { 3438 CharUnits sz = getTypeSizeInChars(type); 3439 3440 // Make all integer and enum types at least as large as an int 3441 if (sz.isPositive() && type->isIntegralOrEnumerationType()) 3442 sz = std::max(sz, getTypeSizeInChars(IntTy)); 3443 // Treat arrays as pointers, since that's how they're passed in. 3444 else if (type->isArrayType()) 3445 sz = getTypeSizeInChars(VoidPtrTy); 3446 return sz; 3447} 3448 3449static inline 3450std::string charUnitsToString(const CharUnits &CU) { 3451 return llvm::itostr(CU.getQuantity()); 3452} 3453 3454/// getObjCEncodingForBlockDecl - Return the encoded type for this block 3455/// declaration. 3456void ASTContext::getObjCEncodingForBlock(const BlockExpr *Expr, 3457 std::string& S) { 3458 const BlockDecl *Decl = Expr->getBlockDecl(); 3459 QualType BlockTy = 3460 Expr->getType()->getAs<BlockPointerType>()->getPointeeType(); 3461 // Encode result type. 3462 getObjCEncodingForType(BlockTy->getAs<FunctionType>()->getResultType(), S); 3463 // Compute size of all parameters. 3464 // Start with computing size of a pointer in number of bytes. 3465 // FIXME: There might(should) be a better way of doing this computation! 3466 SourceLocation Loc; 3467 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3468 CharUnits ParmOffset = PtrSize; 3469 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), 3470 E = Decl->param_end(); PI != E; ++PI) { 3471 QualType PType = (*PI)->getType(); 3472 CharUnits sz = getObjCEncodingTypeSize(PType); 3473 assert (sz.isPositive() && "BlockExpr - Incomplete param type"); 3474 ParmOffset += sz; 3475 } 3476 // Size of the argument frame 3477 S += charUnitsToString(ParmOffset); 3478 // Block pointer and offset. 3479 S += "@?0"; 3480 ParmOffset = PtrSize; 3481 3482 // Argument types. 3483 ParmOffset = PtrSize; 3484 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), E = 3485 Decl->param_end(); PI != E; ++PI) { 3486 ParmVarDecl *PVDecl = *PI; 3487 QualType PType = PVDecl->getOriginalType(); 3488 if (const ArrayType *AT = 3489 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3490 // Use array's original type only if it has known number of 3491 // elements. 3492 if (!isa<ConstantArrayType>(AT)) 3493 PType = PVDecl->getType(); 3494 } else if (PType->isFunctionType()) 3495 PType = PVDecl->getType(); 3496 getObjCEncodingForType(PType, S); 3497 S += charUnitsToString(ParmOffset); 3498 ParmOffset += getObjCEncodingTypeSize(PType); 3499 } 3500} 3501 3502/// getObjCEncodingForMethodDecl - Return the encoded type for this method 3503/// declaration. 3504void ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, 3505 std::string& S) { 3506 // FIXME: This is not very efficient. 3507 // Encode type qualifer, 'in', 'inout', etc. for the return type. 3508 getObjCEncodingForTypeQualifier(Decl->getObjCDeclQualifier(), S); 3509 // Encode result type. 3510 getObjCEncodingForType(Decl->getResultType(), S); 3511 // Compute size of all parameters. 3512 // Start with computing size of a pointer in number of bytes. 3513 // FIXME: There might(should) be a better way of doing this computation! 3514 SourceLocation Loc; 3515 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3516 // The first two arguments (self and _cmd) are pointers; account for 3517 // their size. 3518 CharUnits ParmOffset = 2 * PtrSize; 3519 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3520 E = Decl->sel_param_end(); PI != E; ++PI) { 3521 QualType PType = (*PI)->getType(); 3522 CharUnits sz = getObjCEncodingTypeSize(PType); 3523 assert (sz.isPositive() && 3524 "getObjCEncodingForMethodDecl - Incomplete param type"); 3525 ParmOffset += sz; 3526 } 3527 S += charUnitsToString(ParmOffset); 3528 S += "@0:"; 3529 S += charUnitsToString(PtrSize); 3530 3531 // Argument types. 3532 ParmOffset = 2 * PtrSize; 3533 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3534 E = Decl->sel_param_end(); PI != E; ++PI) { 3535 ParmVarDecl *PVDecl = *PI; 3536 QualType PType = PVDecl->getOriginalType(); 3537 if (const ArrayType *AT = 3538 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3539 // Use array's original type only if it has known number of 3540 // elements. 3541 if (!isa<ConstantArrayType>(AT)) 3542 PType = PVDecl->getType(); 3543 } else if (PType->isFunctionType()) 3544 PType = PVDecl->getType(); 3545 // Process argument qualifiers for user supplied arguments; such as, 3546 // 'in', 'inout', etc. 3547 getObjCEncodingForTypeQualifier(PVDecl->getObjCDeclQualifier(), S); 3548 getObjCEncodingForType(PType, S); 3549 S += charUnitsToString(ParmOffset); 3550 ParmOffset += getObjCEncodingTypeSize(PType); 3551 } 3552} 3553 3554/// getObjCEncodingForPropertyDecl - Return the encoded type for this 3555/// property declaration. If non-NULL, Container must be either an 3556/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be 3557/// NULL when getting encodings for protocol properties. 3558/// Property attributes are stored as a comma-delimited C string. The simple 3559/// attributes readonly and bycopy are encoded as single characters. The 3560/// parametrized attributes, getter=name, setter=name, and ivar=name, are 3561/// encoded as single characters, followed by an identifier. Property types 3562/// are also encoded as a parametrized attribute. The characters used to encode 3563/// these attributes are defined by the following enumeration: 3564/// @code 3565/// enum PropertyAttributes { 3566/// kPropertyReadOnly = 'R', // property is read-only. 3567/// kPropertyBycopy = 'C', // property is a copy of the value last assigned 3568/// kPropertyByref = '&', // property is a reference to the value last assigned 3569/// kPropertyDynamic = 'D', // property is dynamic 3570/// kPropertyGetter = 'G', // followed by getter selector name 3571/// kPropertySetter = 'S', // followed by setter selector name 3572/// kPropertyInstanceVariable = 'V' // followed by instance variable name 3573/// kPropertyType = 't' // followed by old-style type encoding. 3574/// kPropertyWeak = 'W' // 'weak' property 3575/// kPropertyStrong = 'P' // property GC'able 3576/// kPropertyNonAtomic = 'N' // property non-atomic 3577/// }; 3578/// @endcode 3579void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 3580 const Decl *Container, 3581 std::string& S) { 3582 // Collect information from the property implementation decl(s). 3583 bool Dynamic = false; 3584 ObjCPropertyImplDecl *SynthesizePID = 0; 3585 3586 // FIXME: Duplicated code due to poor abstraction. 3587 if (Container) { 3588 if (const ObjCCategoryImplDecl *CID = 3589 dyn_cast<ObjCCategoryImplDecl>(Container)) { 3590 for (ObjCCategoryImplDecl::propimpl_iterator 3591 i = CID->propimpl_begin(), e = CID->propimpl_end(); 3592 i != e; ++i) { 3593 ObjCPropertyImplDecl *PID = *i; 3594 if (PID->getPropertyDecl() == PD) { 3595 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3596 Dynamic = true; 3597 } else { 3598 SynthesizePID = PID; 3599 } 3600 } 3601 } 3602 } else { 3603 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container); 3604 for (ObjCCategoryImplDecl::propimpl_iterator 3605 i = OID->propimpl_begin(), e = OID->propimpl_end(); 3606 i != e; ++i) { 3607 ObjCPropertyImplDecl *PID = *i; 3608 if (PID->getPropertyDecl() == PD) { 3609 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3610 Dynamic = true; 3611 } else { 3612 SynthesizePID = PID; 3613 } 3614 } 3615 } 3616 } 3617 } 3618 3619 // FIXME: This is not very efficient. 3620 S = "T"; 3621 3622 // Encode result type. 3623 // GCC has some special rules regarding encoding of properties which 3624 // closely resembles encoding of ivars. 3625 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, 0, 3626 true /* outermost type */, 3627 true /* encoding for property */); 3628 3629 if (PD->isReadOnly()) { 3630 S += ",R"; 3631 } else { 3632 switch (PD->getSetterKind()) { 3633 case ObjCPropertyDecl::Assign: break; 3634 case ObjCPropertyDecl::Copy: S += ",C"; break; 3635 case ObjCPropertyDecl::Retain: S += ",&"; break; 3636 } 3637 } 3638 3639 // It really isn't clear at all what this means, since properties 3640 // are "dynamic by default". 3641 if (Dynamic) 3642 S += ",D"; 3643 3644 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) 3645 S += ",N"; 3646 3647 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) { 3648 S += ",G"; 3649 S += PD->getGetterName().getAsString(); 3650 } 3651 3652 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) { 3653 S += ",S"; 3654 S += PD->getSetterName().getAsString(); 3655 } 3656 3657 if (SynthesizePID) { 3658 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl(); 3659 S += ",V"; 3660 S += OID->getNameAsString(); 3661 } 3662 3663 // FIXME: OBJCGC: weak & strong 3664} 3665 3666/// getLegacyIntegralTypeEncoding - 3667/// Another legacy compatibility encoding: 32-bit longs are encoded as 3668/// 'l' or 'L' , but not always. For typedefs, we need to use 3669/// 'i' or 'I' instead if encoding a struct field, or a pointer! 3670/// 3671void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const { 3672 if (isa<TypedefType>(PointeeTy.getTypePtr())) { 3673 if (const BuiltinType *BT = PointeeTy->getAs<BuiltinType>()) { 3674 if (BT->getKind() == BuiltinType::ULong && 3675 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3676 PointeeTy = UnsignedIntTy; 3677 else 3678 if (BT->getKind() == BuiltinType::Long && 3679 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3680 PointeeTy = IntTy; 3681 } 3682 } 3683} 3684 3685void ASTContext::getObjCEncodingForType(QualType T, std::string& S, 3686 const FieldDecl *Field) { 3687 // We follow the behavior of gcc, expanding structures which are 3688 // directly pointed to, and expanding embedded structures. Note that 3689 // these rules are sufficient to prevent recursive encoding of the 3690 // same type. 3691 getObjCEncodingForTypeImpl(T, S, true, true, Field, 3692 true /* outermost type */); 3693} 3694 3695static char ObjCEncodingForPrimitiveKind(const ASTContext *C, QualType T) { 3696 switch (T->getAs<BuiltinType>()->getKind()) { 3697 default: assert(0 && "Unhandled builtin type kind"); 3698 case BuiltinType::Void: return 'v'; 3699 case BuiltinType::Bool: return 'B'; 3700 case BuiltinType::Char_U: 3701 case BuiltinType::UChar: return 'C'; 3702 case BuiltinType::UShort: return 'S'; 3703 case BuiltinType::UInt: return 'I'; 3704 case BuiltinType::ULong: 3705 return 3706 (const_cast<ASTContext *>(C))->getIntWidth(T) == 32 ? 'L' : 'Q'; 3707 case BuiltinType::UInt128: return 'T'; 3708 case BuiltinType::ULongLong: return 'Q'; 3709 case BuiltinType::Char_S: 3710 case BuiltinType::SChar: return 'c'; 3711 case BuiltinType::Short: return 's'; 3712 case BuiltinType::WChar: 3713 case BuiltinType::Int: return 'i'; 3714 case BuiltinType::Long: 3715 return 3716 (const_cast<ASTContext *>(C))->getIntWidth(T) == 32 ? 'l' : 'q'; 3717 case BuiltinType::LongLong: return 'q'; 3718 case BuiltinType::Int128: return 't'; 3719 case BuiltinType::Float: return 'f'; 3720 case BuiltinType::Double: return 'd'; 3721 case BuiltinType::LongDouble: return 'D'; 3722 } 3723} 3724 3725static void EncodeBitField(const ASTContext *Context, std::string& S, 3726 QualType T, const FieldDecl *FD) { 3727 const Expr *E = FD->getBitWidth(); 3728 assert(E && "bitfield width not there - getObjCEncodingForTypeImpl"); 3729 ASTContext *Ctx = const_cast<ASTContext*>(Context); 3730 S += 'b'; 3731 // The NeXT runtime encodes bit fields as b followed by the number of bits. 3732 // The GNU runtime requires more information; bitfields are encoded as b, 3733 // then the offset (in bits) of the first element, then the type of the 3734 // bitfield, then the size in bits. For example, in this structure: 3735 // 3736 // struct 3737 // { 3738 // int integer; 3739 // int flags:2; 3740 // }; 3741 // On a 32-bit system, the encoding for flags would be b2 for the NeXT 3742 // runtime, but b32i2 for the GNU runtime. The reason for this extra 3743 // information is not especially sensible, but we're stuck with it for 3744 // compatibility with GCC, although providing it breaks anything that 3745 // actually uses runtime introspection and wants to work on both runtimes... 3746 if (!Ctx->getLangOptions().NeXTRuntime) { 3747 const RecordDecl *RD = FD->getParent(); 3748 const ASTRecordLayout &RL = Ctx->getASTRecordLayout(RD); 3749 // FIXME: This same linear search is also used in ExprConstant - it might 3750 // be better if the FieldDecl stored its offset. We'd be increasing the 3751 // size of the object slightly, but saving some time every time it is used. 3752 unsigned i = 0; 3753 for (RecordDecl::field_iterator Field = RD->field_begin(), 3754 FieldEnd = RD->field_end(); 3755 Field != FieldEnd; (void)++Field, ++i) { 3756 if (*Field == FD) 3757 break; 3758 } 3759 S += llvm::utostr(RL.getFieldOffset(i)); 3760 S += ObjCEncodingForPrimitiveKind(Context, T); 3761 } 3762 unsigned N = E->EvaluateAsInt(*Ctx).getZExtValue(); 3763 S += llvm::utostr(N); 3764} 3765 3766// FIXME: Use SmallString for accumulating string. 3767void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S, 3768 bool ExpandPointedToStructures, 3769 bool ExpandStructures, 3770 const FieldDecl *FD, 3771 bool OutermostType, 3772 bool EncodingProperty) { 3773 if (T->getAs<BuiltinType>()) { 3774 if (FD && FD->isBitField()) 3775 return EncodeBitField(this, S, T, FD); 3776 S += ObjCEncodingForPrimitiveKind(this, T); 3777 return; 3778 } 3779 3780 if (const ComplexType *CT = T->getAs<ComplexType>()) { 3781 S += 'j'; 3782 getObjCEncodingForTypeImpl(CT->getElementType(), S, false, false, 0, false, 3783 false); 3784 return; 3785 } 3786 3787 // encoding for pointer or r3eference types. 3788 QualType PointeeTy; 3789 if (const PointerType *PT = T->getAs<PointerType>()) { 3790 if (PT->isObjCSelType()) { 3791 S += ':'; 3792 return; 3793 } 3794 PointeeTy = PT->getPointeeType(); 3795 } 3796 else if (const ReferenceType *RT = T->getAs<ReferenceType>()) 3797 PointeeTy = RT->getPointeeType(); 3798 if (!PointeeTy.isNull()) { 3799 bool isReadOnly = false; 3800 // For historical/compatibility reasons, the read-only qualifier of the 3801 // pointee gets emitted _before_ the '^'. The read-only qualifier of 3802 // the pointer itself gets ignored, _unless_ we are looking at a typedef! 3803 // Also, do not emit the 'r' for anything but the outermost type! 3804 if (isa<TypedefType>(T.getTypePtr())) { 3805 if (OutermostType && T.isConstQualified()) { 3806 isReadOnly = true; 3807 S += 'r'; 3808 } 3809 } else if (OutermostType) { 3810 QualType P = PointeeTy; 3811 while (P->getAs<PointerType>()) 3812 P = P->getAs<PointerType>()->getPointeeType(); 3813 if (P.isConstQualified()) { 3814 isReadOnly = true; 3815 S += 'r'; 3816 } 3817 } 3818 if (isReadOnly) { 3819 // Another legacy compatibility encoding. Some ObjC qualifier and type 3820 // combinations need to be rearranged. 3821 // Rewrite "in const" from "nr" to "rn" 3822 if (llvm::StringRef(S).endswith("nr")) 3823 S.replace(S.end()-2, S.end(), "rn"); 3824 } 3825 3826 if (PointeeTy->isCharType()) { 3827 // char pointer types should be encoded as '*' unless it is a 3828 // type that has been typedef'd to 'BOOL'. 3829 if (!isTypeTypedefedAsBOOL(PointeeTy)) { 3830 S += '*'; 3831 return; 3832 } 3833 } else if (const RecordType *RTy = PointeeTy->getAs<RecordType>()) { 3834 // GCC binary compat: Need to convert "struct objc_class *" to "#". 3835 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_class")) { 3836 S += '#'; 3837 return; 3838 } 3839 // GCC binary compat: Need to convert "struct objc_object *" to "@". 3840 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_object")) { 3841 S += '@'; 3842 return; 3843 } 3844 // fall through... 3845 } 3846 S += '^'; 3847 getLegacyIntegralTypeEncoding(PointeeTy); 3848 3849 getObjCEncodingForTypeImpl(PointeeTy, S, false, ExpandPointedToStructures, 3850 NULL); 3851 return; 3852 } 3853 3854 if (const ArrayType *AT = 3855 // Ignore type qualifiers etc. 3856 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) { 3857 if (isa<IncompleteArrayType>(AT)) { 3858 // Incomplete arrays are encoded as a pointer to the array element. 3859 S += '^'; 3860 3861 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3862 false, ExpandStructures, FD); 3863 } else { 3864 S += '['; 3865 3866 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 3867 S += llvm::utostr(CAT->getSize().getZExtValue()); 3868 else { 3869 //Variable length arrays are encoded as a regular array with 0 elements. 3870 assert(isa<VariableArrayType>(AT) && "Unknown array type!"); 3871 S += '0'; 3872 } 3873 3874 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3875 false, ExpandStructures, FD); 3876 S += ']'; 3877 } 3878 return; 3879 } 3880 3881 if (T->getAs<FunctionType>()) { 3882 S += '?'; 3883 return; 3884 } 3885 3886 if (const RecordType *RTy = T->getAs<RecordType>()) { 3887 RecordDecl *RDecl = RTy->getDecl(); 3888 S += RDecl->isUnion() ? '(' : '{'; 3889 // Anonymous structures print as '?' 3890 if (const IdentifierInfo *II = RDecl->getIdentifier()) { 3891 S += II->getName(); 3892 if (ClassTemplateSpecializationDecl *Spec 3893 = dyn_cast<ClassTemplateSpecializationDecl>(RDecl)) { 3894 const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs(); 3895 std::string TemplateArgsStr 3896 = TemplateSpecializationType::PrintTemplateArgumentList( 3897 TemplateArgs.data(), 3898 TemplateArgs.size(), 3899 (*this).PrintingPolicy); 3900 3901 S += TemplateArgsStr; 3902 } 3903 } else { 3904 S += '?'; 3905 } 3906 if (ExpandStructures) { 3907 S += '='; 3908 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 3909 FieldEnd = RDecl->field_end(); 3910 Field != FieldEnd; ++Field) { 3911 if (FD) { 3912 S += '"'; 3913 S += Field->getNameAsString(); 3914 S += '"'; 3915 } 3916 3917 // Special case bit-fields. 3918 if (Field->isBitField()) { 3919 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, 3920 (*Field)); 3921 } else { 3922 QualType qt = Field->getType(); 3923 getLegacyIntegralTypeEncoding(qt); 3924 getObjCEncodingForTypeImpl(qt, S, false, true, 3925 FD); 3926 } 3927 } 3928 } 3929 S += RDecl->isUnion() ? ')' : '}'; 3930 return; 3931 } 3932 3933 if (T->isEnumeralType()) { 3934 if (FD && FD->isBitField()) 3935 EncodeBitField(this, S, T, FD); 3936 else 3937 S += 'i'; 3938 return; 3939 } 3940 3941 if (T->isBlockPointerType()) { 3942 S += "@?"; // Unlike a pointer-to-function, which is "^?". 3943 return; 3944 } 3945 3946 // Ignore protocol qualifiers when mangling at this level. 3947 if (const ObjCObjectType *OT = T->getAs<ObjCObjectType>()) 3948 T = OT->getBaseType(); 3949 3950 if (const ObjCInterfaceType *OIT = T->getAs<ObjCInterfaceType>()) { 3951 // @encode(class_name) 3952 ObjCInterfaceDecl *OI = OIT->getDecl(); 3953 S += '{'; 3954 const IdentifierInfo *II = OI->getIdentifier(); 3955 S += II->getName(); 3956 S += '='; 3957 llvm::SmallVector<ObjCIvarDecl*, 32> Ivars; 3958 DeepCollectObjCIvars(OI, true, Ivars); 3959 for (unsigned i = 0, e = Ivars.size(); i != e; ++i) { 3960 FieldDecl *Field = cast<FieldDecl>(Ivars[i]); 3961 if (Field->isBitField()) 3962 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, Field); 3963 else 3964 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, FD); 3965 } 3966 S += '}'; 3967 return; 3968 } 3969 3970 if (const ObjCObjectPointerType *OPT = T->getAs<ObjCObjectPointerType>()) { 3971 if (OPT->isObjCIdType()) { 3972 S += '@'; 3973 return; 3974 } 3975 3976 if (OPT->isObjCClassType() || OPT->isObjCQualifiedClassType()) { 3977 // FIXME: Consider if we need to output qualifiers for 'Class<p>'. 3978 // Since this is a binary compatibility issue, need to consult with runtime 3979 // folks. Fortunately, this is a *very* obsure construct. 3980 S += '#'; 3981 return; 3982 } 3983 3984 if (OPT->isObjCQualifiedIdType()) { 3985 getObjCEncodingForTypeImpl(getObjCIdType(), S, 3986 ExpandPointedToStructures, 3987 ExpandStructures, FD); 3988 if (FD || EncodingProperty) { 3989 // Note that we do extended encoding of protocol qualifer list 3990 // Only when doing ivar or property encoding. 3991 S += '"'; 3992 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 3993 E = OPT->qual_end(); I != E; ++I) { 3994 S += '<'; 3995 S += (*I)->getNameAsString(); 3996 S += '>'; 3997 } 3998 S += '"'; 3999 } 4000 return; 4001 } 4002 4003 QualType PointeeTy = OPT->getPointeeType(); 4004 if (!EncodingProperty && 4005 isa<TypedefType>(PointeeTy.getTypePtr())) { 4006 // Another historical/compatibility reason. 4007 // We encode the underlying type which comes out as 4008 // {...}; 4009 S += '^'; 4010 getObjCEncodingForTypeImpl(PointeeTy, S, 4011 false, ExpandPointedToStructures, 4012 NULL); 4013 return; 4014 } 4015 4016 S += '@'; 4017 if (OPT->getInterfaceDecl() && (FD || EncodingProperty)) { 4018 S += '"'; 4019 S += OPT->getInterfaceDecl()->getIdentifier()->getName(); 4020 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 4021 E = OPT->qual_end(); I != E; ++I) { 4022 S += '<'; 4023 S += (*I)->getNameAsString(); 4024 S += '>'; 4025 } 4026 S += '"'; 4027 } 4028 return; 4029 } 4030 4031 // gcc just blithely ignores member pointers. 4032 // TODO: maybe there should be a mangling for these 4033 if (T->getAs<MemberPointerType>()) 4034 return; 4035 4036 if (T->isVectorType()) { 4037 // This matches gcc's encoding, even though technically it is 4038 // insufficient. 4039 // FIXME. We should do a better job than gcc. 4040 return; 4041 } 4042 4043 assert(0 && "@encode for type not implemented!"); 4044} 4045 4046void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 4047 std::string& S) const { 4048 if (QT & Decl::OBJC_TQ_In) 4049 S += 'n'; 4050 if (QT & Decl::OBJC_TQ_Inout) 4051 S += 'N'; 4052 if (QT & Decl::OBJC_TQ_Out) 4053 S += 'o'; 4054 if (QT & Decl::OBJC_TQ_Bycopy) 4055 S += 'O'; 4056 if (QT & Decl::OBJC_TQ_Byref) 4057 S += 'R'; 4058 if (QT & Decl::OBJC_TQ_Oneway) 4059 S += 'V'; 4060} 4061 4062void ASTContext::setBuiltinVaListType(QualType T) { 4063 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!"); 4064 4065 BuiltinVaListType = T; 4066} 4067 4068void ASTContext::setObjCIdType(QualType T) { 4069 ObjCIdTypedefType = T; 4070} 4071 4072void ASTContext::setObjCSelType(QualType T) { 4073 ObjCSelTypedefType = T; 4074} 4075 4076void ASTContext::setObjCProtoType(QualType QT) { 4077 ObjCProtoType = QT; 4078} 4079 4080void ASTContext::setObjCClassType(QualType T) { 4081 ObjCClassTypedefType = T; 4082} 4083 4084void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) { 4085 assert(ObjCConstantStringType.isNull() && 4086 "'NSConstantString' type already set!"); 4087 4088 ObjCConstantStringType = getObjCInterfaceType(Decl); 4089} 4090 4091/// \brief Retrieve the template name that corresponds to a non-empty 4092/// lookup. 4093TemplateName ASTContext::getOverloadedTemplateName(UnresolvedSetIterator Begin, 4094 UnresolvedSetIterator End) { 4095 unsigned size = End - Begin; 4096 assert(size > 1 && "set is not overloaded!"); 4097 4098 void *memory = Allocate(sizeof(OverloadedTemplateStorage) + 4099 size * sizeof(FunctionTemplateDecl*)); 4100 OverloadedTemplateStorage *OT = new(memory) OverloadedTemplateStorage(size); 4101 4102 NamedDecl **Storage = OT->getStorage(); 4103 for (UnresolvedSetIterator I = Begin; I != End; ++I) { 4104 NamedDecl *D = *I; 4105 assert(isa<FunctionTemplateDecl>(D) || 4106 (isa<UsingShadowDecl>(D) && 4107 isa<FunctionTemplateDecl>(D->getUnderlyingDecl()))); 4108 *Storage++ = D; 4109 } 4110 4111 return TemplateName(OT); 4112} 4113 4114/// \brief Retrieve the template name that represents a qualified 4115/// template name such as \c std::vector. 4116TemplateName ASTContext::getQualifiedTemplateName(NestedNameSpecifier *NNS, 4117 bool TemplateKeyword, 4118 TemplateDecl *Template) { 4119 // FIXME: Canonicalization? 4120 llvm::FoldingSetNodeID ID; 4121 QualifiedTemplateName::Profile(ID, NNS, TemplateKeyword, Template); 4122 4123 void *InsertPos = 0; 4124 QualifiedTemplateName *QTN = 4125 QualifiedTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4126 if (!QTN) { 4127 QTN = new (*this,4) QualifiedTemplateName(NNS, TemplateKeyword, Template); 4128 QualifiedTemplateNames.InsertNode(QTN, InsertPos); 4129 } 4130 4131 return TemplateName(QTN); 4132} 4133 4134/// \brief Retrieve the template name that represents a dependent 4135/// template name such as \c MetaFun::template apply. 4136TemplateName ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 4137 const IdentifierInfo *Name) { 4138 assert((!NNS || NNS->isDependent()) && 4139 "Nested name specifier must be dependent"); 4140 4141 llvm::FoldingSetNodeID ID; 4142 DependentTemplateName::Profile(ID, NNS, Name); 4143 4144 void *InsertPos = 0; 4145 DependentTemplateName *QTN = 4146 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4147 4148 if (QTN) 4149 return TemplateName(QTN); 4150 4151 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 4152 if (CanonNNS == NNS) { 4153 QTN = new (*this,4) DependentTemplateName(NNS, Name); 4154 } else { 4155 TemplateName Canon = getDependentTemplateName(CanonNNS, Name); 4156 QTN = new (*this,4) DependentTemplateName(NNS, Name, Canon); 4157 DependentTemplateName *CheckQTN = 4158 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4159 assert(!CheckQTN && "Dependent type name canonicalization broken"); 4160 (void)CheckQTN; 4161 } 4162 4163 DependentTemplateNames.InsertNode(QTN, InsertPos); 4164 return TemplateName(QTN); 4165} 4166 4167/// \brief Retrieve the template name that represents a dependent 4168/// template name such as \c MetaFun::template operator+. 4169TemplateName 4170ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 4171 OverloadedOperatorKind Operator) { 4172 assert((!NNS || NNS->isDependent()) && 4173 "Nested name specifier must be dependent"); 4174 4175 llvm::FoldingSetNodeID ID; 4176 DependentTemplateName::Profile(ID, NNS, Operator); 4177 4178 void *InsertPos = 0; 4179 DependentTemplateName *QTN 4180 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4181 4182 if (QTN) 4183 return TemplateName(QTN); 4184 4185 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 4186 if (CanonNNS == NNS) { 4187 QTN = new (*this,4) DependentTemplateName(NNS, Operator); 4188 } else { 4189 TemplateName Canon = getDependentTemplateName(CanonNNS, Operator); 4190 QTN = new (*this,4) DependentTemplateName(NNS, Operator, Canon); 4191 4192 DependentTemplateName *CheckQTN 4193 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4194 assert(!CheckQTN && "Dependent template name canonicalization broken"); 4195 (void)CheckQTN; 4196 } 4197 4198 DependentTemplateNames.InsertNode(QTN, InsertPos); 4199 return TemplateName(QTN); 4200} 4201 4202/// getFromTargetType - Given one of the integer types provided by 4203/// TargetInfo, produce the corresponding type. The unsigned @p Type 4204/// is actually a value of type @c TargetInfo::IntType. 4205CanQualType ASTContext::getFromTargetType(unsigned Type) const { 4206 switch (Type) { 4207 case TargetInfo::NoInt: return CanQualType(); 4208 case TargetInfo::SignedShort: return ShortTy; 4209 case TargetInfo::UnsignedShort: return UnsignedShortTy; 4210 case TargetInfo::SignedInt: return IntTy; 4211 case TargetInfo::UnsignedInt: return UnsignedIntTy; 4212 case TargetInfo::SignedLong: return LongTy; 4213 case TargetInfo::UnsignedLong: return UnsignedLongTy; 4214 case TargetInfo::SignedLongLong: return LongLongTy; 4215 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy; 4216 } 4217 4218 assert(false && "Unhandled TargetInfo::IntType value"); 4219 return CanQualType(); 4220} 4221 4222//===----------------------------------------------------------------------===// 4223// Type Predicates. 4224//===----------------------------------------------------------------------===// 4225 4226/// isObjCNSObjectType - Return true if this is an NSObject object using 4227/// NSObject attribute on a c-style pointer type. 4228/// FIXME - Make it work directly on types. 4229/// FIXME: Move to Type. 4230/// 4231bool ASTContext::isObjCNSObjectType(QualType Ty) const { 4232 if (TypedefType *TDT = dyn_cast<TypedefType>(Ty)) { 4233 if (TypedefDecl *TD = TDT->getDecl()) 4234 if (TD->getAttr<ObjCNSObjectAttr>()) 4235 return true; 4236 } 4237 return false; 4238} 4239 4240/// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 4241/// garbage collection attribute. 4242/// 4243Qualifiers::GC ASTContext::getObjCGCAttrKind(const QualType &Ty) const { 4244 Qualifiers::GC GCAttrs = Qualifiers::GCNone; 4245 if (getLangOptions().ObjC1 && 4246 getLangOptions().getGCMode() != LangOptions::NonGC) { 4247 GCAttrs = Ty.getObjCGCAttr(); 4248 // Default behavious under objective-c's gc is for objective-c pointers 4249 // (or pointers to them) be treated as though they were declared 4250 // as __strong. 4251 if (GCAttrs == Qualifiers::GCNone) { 4252 if (Ty->isObjCObjectPointerType() || Ty->isBlockPointerType()) 4253 GCAttrs = Qualifiers::Strong; 4254 else if (Ty->isPointerType()) 4255 return getObjCGCAttrKind(Ty->getAs<PointerType>()->getPointeeType()); 4256 } 4257 // Non-pointers have none gc'able attribute regardless of the attribute 4258 // set on them. 4259 else if (!Ty->isAnyPointerType() && !Ty->isBlockPointerType()) 4260 return Qualifiers::GCNone; 4261 } 4262 return GCAttrs; 4263} 4264 4265//===----------------------------------------------------------------------===// 4266// Type Compatibility Testing 4267//===----------------------------------------------------------------------===// 4268 4269/// areCompatVectorTypes - Return true if the two specified vector types are 4270/// compatible. 4271static bool areCompatVectorTypes(const VectorType *LHS, 4272 const VectorType *RHS) { 4273 assert(LHS->isCanonicalUnqualified() && RHS->isCanonicalUnqualified()); 4274 return LHS->getElementType() == RHS->getElementType() && 4275 LHS->getNumElements() == RHS->getNumElements(); 4276} 4277 4278bool ASTContext::areCompatibleVectorTypes(QualType FirstVec, 4279 QualType SecondVec) { 4280 assert(FirstVec->isVectorType() && "FirstVec should be a vector type"); 4281 assert(SecondVec->isVectorType() && "SecondVec should be a vector type"); 4282 4283 if (hasSameUnqualifiedType(FirstVec, SecondVec)) 4284 return true; 4285 4286 // Treat Neon vector types and most AltiVec vector types as if they are the 4287 // equivalent GCC vector types. 4288 const VectorType *First = FirstVec->getAs<VectorType>(); 4289 const VectorType *Second = SecondVec->getAs<VectorType>(); 4290 if (First->getNumElements() == Second->getNumElements() && 4291 hasSameType(First->getElementType(), Second->getElementType()) && 4292 First->getVectorKind() != VectorType::AltiVecPixel && 4293 First->getVectorKind() != VectorType::AltiVecBool && 4294 Second->getVectorKind() != VectorType::AltiVecPixel && 4295 Second->getVectorKind() != VectorType::AltiVecBool) 4296 return true; 4297 4298 return false; 4299} 4300 4301//===----------------------------------------------------------------------===// 4302// ObjCQualifiedIdTypesAreCompatible - Compatibility testing for qualified id's. 4303//===----------------------------------------------------------------------===// 4304 4305/// ProtocolCompatibleWithProtocol - return 'true' if 'lProto' is in the 4306/// inheritance hierarchy of 'rProto'. 4307bool ASTContext::ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 4308 ObjCProtocolDecl *rProto) { 4309 if (lProto == rProto) 4310 return true; 4311 for (ObjCProtocolDecl::protocol_iterator PI = rProto->protocol_begin(), 4312 E = rProto->protocol_end(); PI != E; ++PI) 4313 if (ProtocolCompatibleWithProtocol(lProto, *PI)) 4314 return true; 4315 return false; 4316} 4317 4318/// QualifiedIdConformsQualifiedId - compare id<p,...> with id<p1,...> 4319/// return true if lhs's protocols conform to rhs's protocol; false 4320/// otherwise. 4321bool ASTContext::QualifiedIdConformsQualifiedId(QualType lhs, QualType rhs) { 4322 if (lhs->isObjCQualifiedIdType() && rhs->isObjCQualifiedIdType()) 4323 return ObjCQualifiedIdTypesAreCompatible(lhs, rhs, false); 4324 return false; 4325} 4326 4327/// ObjCQualifiedClassTypesAreCompatible - compare Class<p,...> and 4328/// Class<p1, ...>. 4329bool ASTContext::ObjCQualifiedClassTypesAreCompatible(QualType lhs, 4330 QualType rhs) { 4331 const ObjCObjectPointerType *lhsQID = lhs->getAs<ObjCObjectPointerType>(); 4332 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 4333 assert ((lhsQID && rhsOPT) && "ObjCQualifiedClassTypesAreCompatible"); 4334 4335 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4336 E = lhsQID->qual_end(); I != E; ++I) { 4337 bool match = false; 4338 ObjCProtocolDecl *lhsProto = *I; 4339 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 4340 E = rhsOPT->qual_end(); J != E; ++J) { 4341 ObjCProtocolDecl *rhsProto = *J; 4342 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto)) { 4343 match = true; 4344 break; 4345 } 4346 } 4347 if (!match) 4348 return false; 4349 } 4350 return true; 4351} 4352 4353/// ObjCQualifiedIdTypesAreCompatible - We know that one of lhs/rhs is an 4354/// ObjCQualifiedIDType. 4355bool ASTContext::ObjCQualifiedIdTypesAreCompatible(QualType lhs, QualType rhs, 4356 bool compare) { 4357 // Allow id<P..> and an 'id' or void* type in all cases. 4358 if (lhs->isVoidPointerType() || 4359 lhs->isObjCIdType() || lhs->isObjCClassType()) 4360 return true; 4361 else if (rhs->isVoidPointerType() || 4362 rhs->isObjCIdType() || rhs->isObjCClassType()) 4363 return true; 4364 4365 if (const ObjCObjectPointerType *lhsQID = lhs->getAsObjCQualifiedIdType()) { 4366 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 4367 4368 if (!rhsOPT) return false; 4369 4370 if (rhsOPT->qual_empty()) { 4371 // If the RHS is a unqualified interface pointer "NSString*", 4372 // make sure we check the class hierarchy. 4373 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4374 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4375 E = lhsQID->qual_end(); I != E; ++I) { 4376 // when comparing an id<P> on lhs with a static type on rhs, 4377 // see if static class implements all of id's protocols, directly or 4378 // through its super class and categories. 4379 if (!rhsID->ClassImplementsProtocol(*I, true)) 4380 return false; 4381 } 4382 } 4383 // If there are no qualifiers and no interface, we have an 'id'. 4384 return true; 4385 } 4386 // Both the right and left sides have qualifiers. 4387 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4388 E = lhsQID->qual_end(); I != E; ++I) { 4389 ObjCProtocolDecl *lhsProto = *I; 4390 bool match = false; 4391 4392 // when comparing an id<P> on lhs with a static type on rhs, 4393 // see if static class implements all of id's protocols, directly or 4394 // through its super class and categories. 4395 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 4396 E = rhsOPT->qual_end(); J != E; ++J) { 4397 ObjCProtocolDecl *rhsProto = *J; 4398 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4399 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4400 match = true; 4401 break; 4402 } 4403 } 4404 // If the RHS is a qualified interface pointer "NSString<P>*", 4405 // make sure we check the class hierarchy. 4406 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4407 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4408 E = lhsQID->qual_end(); I != E; ++I) { 4409 // when comparing an id<P> on lhs with a static type on rhs, 4410 // see if static class implements all of id's protocols, directly or 4411 // through its super class and categories. 4412 if (rhsID->ClassImplementsProtocol(*I, true)) { 4413 match = true; 4414 break; 4415 } 4416 } 4417 } 4418 if (!match) 4419 return false; 4420 } 4421 4422 return true; 4423 } 4424 4425 const ObjCObjectPointerType *rhsQID = rhs->getAsObjCQualifiedIdType(); 4426 assert(rhsQID && "One of the LHS/RHS should be id<x>"); 4427 4428 if (const ObjCObjectPointerType *lhsOPT = 4429 lhs->getAsObjCInterfacePointerType()) { 4430 // If both the right and left sides have qualifiers. 4431 for (ObjCObjectPointerType::qual_iterator I = lhsOPT->qual_begin(), 4432 E = lhsOPT->qual_end(); I != E; ++I) { 4433 ObjCProtocolDecl *lhsProto = *I; 4434 bool match = false; 4435 4436 // when comparing an id<P> on rhs with a static type on lhs, 4437 // see if static class implements all of id's protocols, directly or 4438 // through its super class and categories. 4439 // First, lhs protocols in the qualifier list must be found, direct 4440 // or indirect in rhs's qualifier list or it is a mismatch. 4441 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 4442 E = rhsQID->qual_end(); J != E; ++J) { 4443 ObjCProtocolDecl *rhsProto = *J; 4444 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4445 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4446 match = true; 4447 break; 4448 } 4449 } 4450 if (!match) 4451 return false; 4452 } 4453 4454 // Static class's protocols, or its super class or category protocols 4455 // must be found, direct or indirect in rhs's qualifier list or it is a mismatch. 4456 if (ObjCInterfaceDecl *lhsID = lhsOPT->getInterfaceDecl()) { 4457 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 4458 CollectInheritedProtocols(lhsID, LHSInheritedProtocols); 4459 // This is rather dubious but matches gcc's behavior. If lhs has 4460 // no type qualifier and its class has no static protocol(s) 4461 // assume that it is mismatch. 4462 if (LHSInheritedProtocols.empty() && lhsOPT->qual_empty()) 4463 return false; 4464 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 4465 LHSInheritedProtocols.begin(), 4466 E = LHSInheritedProtocols.end(); I != E; ++I) { 4467 bool match = false; 4468 ObjCProtocolDecl *lhsProto = (*I); 4469 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 4470 E = rhsQID->qual_end(); J != E; ++J) { 4471 ObjCProtocolDecl *rhsProto = *J; 4472 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4473 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4474 match = true; 4475 break; 4476 } 4477 } 4478 if (!match) 4479 return false; 4480 } 4481 } 4482 return true; 4483 } 4484 return false; 4485} 4486 4487/// canAssignObjCInterfaces - Return true if the two interface types are 4488/// compatible for assignment from RHS to LHS. This handles validation of any 4489/// protocol qualifiers on the LHS or RHS. 4490/// 4491bool ASTContext::canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 4492 const ObjCObjectPointerType *RHSOPT) { 4493 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 4494 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 4495 4496 // If either type represents the built-in 'id' or 'Class' types, return true. 4497 if (LHS->isObjCUnqualifiedIdOrClass() || 4498 RHS->isObjCUnqualifiedIdOrClass()) 4499 return true; 4500 4501 if (LHS->isObjCQualifiedId() || RHS->isObjCQualifiedId()) 4502 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4503 QualType(RHSOPT,0), 4504 false); 4505 4506 if (LHS->isObjCQualifiedClass() && RHS->isObjCQualifiedClass()) 4507 return ObjCQualifiedClassTypesAreCompatible(QualType(LHSOPT,0), 4508 QualType(RHSOPT,0)); 4509 4510 // If we have 2 user-defined types, fall into that path. 4511 if (LHS->getInterface() && RHS->getInterface()) 4512 return canAssignObjCInterfaces(LHS, RHS); 4513 4514 return false; 4515} 4516 4517/// canAssignObjCInterfacesInBlockPointer - This routine is specifically written 4518/// for providing type-safty for objective-c pointers used to pass/return 4519/// arguments in block literals. When passed as arguments, passing 'A*' where 4520/// 'id' is expected is not OK. Passing 'Sub *" where 'Super *" is expected is 4521/// not OK. For the return type, the opposite is not OK. 4522bool ASTContext::canAssignObjCInterfacesInBlockPointer( 4523 const ObjCObjectPointerType *LHSOPT, 4524 const ObjCObjectPointerType *RHSOPT) { 4525 if (RHSOPT->isObjCBuiltinType() || LHSOPT->isObjCIdType()) 4526 return true; 4527 4528 if (LHSOPT->isObjCBuiltinType()) { 4529 return RHSOPT->isObjCBuiltinType() || RHSOPT->isObjCQualifiedIdType(); 4530 } 4531 4532 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 4533 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4534 QualType(RHSOPT,0), 4535 false); 4536 4537 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4538 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4539 if (LHS && RHS) { // We have 2 user-defined types. 4540 if (LHS != RHS) { 4541 if (LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 4542 return false; 4543 if (RHS->getDecl()->isSuperClassOf(LHS->getDecl())) 4544 return true; 4545 } 4546 else 4547 return true; 4548 } 4549 return false; 4550} 4551 4552/// getIntersectionOfProtocols - This routine finds the intersection of set 4553/// of protocols inherited from two distinct objective-c pointer objects. 4554/// It is used to build composite qualifier list of the composite type of 4555/// the conditional expression involving two objective-c pointer objects. 4556static 4557void getIntersectionOfProtocols(ASTContext &Context, 4558 const ObjCObjectPointerType *LHSOPT, 4559 const ObjCObjectPointerType *RHSOPT, 4560 llvm::SmallVectorImpl<ObjCProtocolDecl *> &IntersectionOfProtocols) { 4561 4562 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 4563 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 4564 assert(LHS->getInterface() && "LHS must have an interface base"); 4565 assert(RHS->getInterface() && "RHS must have an interface base"); 4566 4567 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> InheritedProtocolSet; 4568 unsigned LHSNumProtocols = LHS->getNumProtocols(); 4569 if (LHSNumProtocols > 0) 4570 InheritedProtocolSet.insert(LHS->qual_begin(), LHS->qual_end()); 4571 else { 4572 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 4573 Context.CollectInheritedProtocols(LHS->getInterface(), 4574 LHSInheritedProtocols); 4575 InheritedProtocolSet.insert(LHSInheritedProtocols.begin(), 4576 LHSInheritedProtocols.end()); 4577 } 4578 4579 unsigned RHSNumProtocols = RHS->getNumProtocols(); 4580 if (RHSNumProtocols > 0) { 4581 ObjCProtocolDecl **RHSProtocols = 4582 const_cast<ObjCProtocolDecl **>(RHS->qual_begin()); 4583 for (unsigned i = 0; i < RHSNumProtocols; ++i) 4584 if (InheritedProtocolSet.count(RHSProtocols[i])) 4585 IntersectionOfProtocols.push_back(RHSProtocols[i]); 4586 } 4587 else { 4588 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> RHSInheritedProtocols; 4589 Context.CollectInheritedProtocols(RHS->getInterface(), 4590 RHSInheritedProtocols); 4591 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 4592 RHSInheritedProtocols.begin(), 4593 E = RHSInheritedProtocols.end(); I != E; ++I) 4594 if (InheritedProtocolSet.count((*I))) 4595 IntersectionOfProtocols.push_back((*I)); 4596 } 4597} 4598 4599/// areCommonBaseCompatible - Returns common base class of the two classes if 4600/// one found. Note that this is O'2 algorithm. But it will be called as the 4601/// last type comparison in a ?-exp of ObjC pointer types before a 4602/// warning is issued. So, its invokation is extremely rare. 4603QualType ASTContext::areCommonBaseCompatible( 4604 const ObjCObjectPointerType *Lptr, 4605 const ObjCObjectPointerType *Rptr) { 4606 const ObjCObjectType *LHS = Lptr->getObjectType(); 4607 const ObjCObjectType *RHS = Rptr->getObjectType(); 4608 const ObjCInterfaceDecl* LDecl = LHS->getInterface(); 4609 const ObjCInterfaceDecl* RDecl = RHS->getInterface(); 4610 if (!LDecl || !RDecl) 4611 return QualType(); 4612 4613 while ((LDecl = LDecl->getSuperClass())) { 4614 LHS = cast<ObjCInterfaceType>(getObjCInterfaceType(LDecl)); 4615 if (canAssignObjCInterfaces(LHS, RHS)) { 4616 llvm::SmallVector<ObjCProtocolDecl *, 8> Protocols; 4617 getIntersectionOfProtocols(*this, Lptr, Rptr, Protocols); 4618 4619 QualType Result = QualType(LHS, 0); 4620 if (!Protocols.empty()) 4621 Result = getObjCObjectType(Result, Protocols.data(), Protocols.size()); 4622 Result = getObjCObjectPointerType(Result); 4623 return Result; 4624 } 4625 } 4626 4627 return QualType(); 4628} 4629 4630bool ASTContext::canAssignObjCInterfaces(const ObjCObjectType *LHS, 4631 const ObjCObjectType *RHS) { 4632 assert(LHS->getInterface() && "LHS is not an interface type"); 4633 assert(RHS->getInterface() && "RHS is not an interface type"); 4634 4635 // Verify that the base decls are compatible: the RHS must be a subclass of 4636 // the LHS. 4637 if (!LHS->getInterface()->isSuperClassOf(RHS->getInterface())) 4638 return false; 4639 4640 // RHS must have a superset of the protocols in the LHS. If the LHS is not 4641 // protocol qualified at all, then we are good. 4642 if (LHS->getNumProtocols() == 0) 4643 return true; 4644 4645 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, then it 4646 // isn't a superset. 4647 if (RHS->getNumProtocols() == 0) 4648 return true; // FIXME: should return false! 4649 4650 for (ObjCObjectType::qual_iterator LHSPI = LHS->qual_begin(), 4651 LHSPE = LHS->qual_end(); 4652 LHSPI != LHSPE; LHSPI++) { 4653 bool RHSImplementsProtocol = false; 4654 4655 // If the RHS doesn't implement the protocol on the left, the types 4656 // are incompatible. 4657 for (ObjCObjectType::qual_iterator RHSPI = RHS->qual_begin(), 4658 RHSPE = RHS->qual_end(); 4659 RHSPI != RHSPE; RHSPI++) { 4660 if ((*RHSPI)->lookupProtocolNamed((*LHSPI)->getIdentifier())) { 4661 RHSImplementsProtocol = true; 4662 break; 4663 } 4664 } 4665 // FIXME: For better diagnostics, consider passing back the protocol name. 4666 if (!RHSImplementsProtocol) 4667 return false; 4668 } 4669 // The RHS implements all protocols listed on the LHS. 4670 return true; 4671} 4672 4673bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) { 4674 // get the "pointed to" types 4675 const ObjCObjectPointerType *LHSOPT = LHS->getAs<ObjCObjectPointerType>(); 4676 const ObjCObjectPointerType *RHSOPT = RHS->getAs<ObjCObjectPointerType>(); 4677 4678 if (!LHSOPT || !RHSOPT) 4679 return false; 4680 4681 return canAssignObjCInterfaces(LHSOPT, RHSOPT) || 4682 canAssignObjCInterfaces(RHSOPT, LHSOPT); 4683} 4684 4685bool ASTContext::canBindObjCObjectType(QualType To, QualType From) { 4686 return canAssignObjCInterfaces( 4687 getObjCObjectPointerType(To)->getAs<ObjCObjectPointerType>(), 4688 getObjCObjectPointerType(From)->getAs<ObjCObjectPointerType>()); 4689} 4690 4691/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible, 4692/// both shall have the identically qualified version of a compatible type. 4693/// C99 6.2.7p1: Two types have compatible types if their types are the 4694/// same. See 6.7.[2,3,5] for additional rules. 4695bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS, 4696 bool CompareUnqualified) { 4697 if (getLangOptions().CPlusPlus) 4698 return hasSameType(LHS, RHS); 4699 4700 return !mergeTypes(LHS, RHS, false, CompareUnqualified).isNull(); 4701} 4702 4703bool ASTContext::typesAreBlockPointerCompatible(QualType LHS, QualType RHS) { 4704 return !mergeTypes(LHS, RHS, true).isNull(); 4705} 4706 4707/// mergeTransparentUnionType - if T is a transparent union type and a member 4708/// of T is compatible with SubType, return the merged type, else return 4709/// QualType() 4710QualType ASTContext::mergeTransparentUnionType(QualType T, QualType SubType, 4711 bool OfBlockPointer, 4712 bool Unqualified) { 4713 if (const RecordType *UT = T->getAsUnionType()) { 4714 RecordDecl *UD = UT->getDecl(); 4715 if (UD->hasAttr<TransparentUnionAttr>()) { 4716 for (RecordDecl::field_iterator it = UD->field_begin(), 4717 itend = UD->field_end(); it != itend; ++it) { 4718 QualType ET = it->getType(); 4719 QualType MT = mergeTypes(ET, SubType, OfBlockPointer, Unqualified); 4720 if (!MT.isNull()) 4721 return MT; 4722 } 4723 } 4724 } 4725 4726 return QualType(); 4727} 4728 4729/// mergeFunctionArgumentTypes - merge two types which appear as function 4730/// argument types 4731QualType ASTContext::mergeFunctionArgumentTypes(QualType lhs, QualType rhs, 4732 bool OfBlockPointer, 4733 bool Unqualified) { 4734 // GNU extension: two types are compatible if they appear as a function 4735 // argument, one of the types is a transparent union type and the other 4736 // type is compatible with a union member 4737 QualType lmerge = mergeTransparentUnionType(lhs, rhs, OfBlockPointer, 4738 Unqualified); 4739 if (!lmerge.isNull()) 4740 return lmerge; 4741 4742 QualType rmerge = mergeTransparentUnionType(rhs, lhs, OfBlockPointer, 4743 Unqualified); 4744 if (!rmerge.isNull()) 4745 return rmerge; 4746 4747 return mergeTypes(lhs, rhs, OfBlockPointer, Unqualified); 4748} 4749 4750QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs, 4751 bool OfBlockPointer, 4752 bool Unqualified) { 4753 const FunctionType *lbase = lhs->getAs<FunctionType>(); 4754 const FunctionType *rbase = rhs->getAs<FunctionType>(); 4755 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 4756 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 4757 bool allLTypes = true; 4758 bool allRTypes = true; 4759 4760 // Check return type 4761 QualType retType; 4762 if (OfBlockPointer) 4763 retType = mergeTypes(rbase->getResultType(), lbase->getResultType(), true, 4764 Unqualified); 4765 else 4766 retType = mergeTypes(lbase->getResultType(), rbase->getResultType(), 4767 false, Unqualified); 4768 if (retType.isNull()) return QualType(); 4769 4770 if (Unqualified) 4771 retType = retType.getUnqualifiedType(); 4772 4773 CanQualType LRetType = getCanonicalType(lbase->getResultType()); 4774 CanQualType RRetType = getCanonicalType(rbase->getResultType()); 4775 if (Unqualified) { 4776 LRetType = LRetType.getUnqualifiedType(); 4777 RRetType = RRetType.getUnqualifiedType(); 4778 } 4779 4780 if (getCanonicalType(retType) != LRetType) 4781 allLTypes = false; 4782 if (getCanonicalType(retType) != RRetType) 4783 allRTypes = false; 4784 // FIXME: double check this 4785 // FIXME: should we error if lbase->getRegParmAttr() != 0 && 4786 // rbase->getRegParmAttr() != 0 && 4787 // lbase->getRegParmAttr() != rbase->getRegParmAttr()? 4788 FunctionType::ExtInfo lbaseInfo = lbase->getExtInfo(); 4789 FunctionType::ExtInfo rbaseInfo = rbase->getExtInfo(); 4790 unsigned RegParm = lbaseInfo.getRegParm() == 0 ? rbaseInfo.getRegParm() : 4791 lbaseInfo.getRegParm(); 4792 bool NoReturn = lbaseInfo.getNoReturn() || rbaseInfo.getNoReturn(); 4793 if (NoReturn != lbaseInfo.getNoReturn() || 4794 RegParm != lbaseInfo.getRegParm()) 4795 allLTypes = false; 4796 if (NoReturn != rbaseInfo.getNoReturn() || 4797 RegParm != rbaseInfo.getRegParm()) 4798 allRTypes = false; 4799 CallingConv lcc = lbaseInfo.getCC(); 4800 CallingConv rcc = rbaseInfo.getCC(); 4801 // Compatible functions must have compatible calling conventions 4802 if (!isSameCallConv(lcc, rcc)) 4803 return QualType(); 4804 4805 if (lproto && rproto) { // two C99 style function prototypes 4806 assert(!lproto->hasExceptionSpec() && !rproto->hasExceptionSpec() && 4807 "C++ shouldn't be here"); 4808 unsigned lproto_nargs = lproto->getNumArgs(); 4809 unsigned rproto_nargs = rproto->getNumArgs(); 4810 4811 // Compatible functions must have the same number of arguments 4812 if (lproto_nargs != rproto_nargs) 4813 return QualType(); 4814 4815 // Variadic and non-variadic functions aren't compatible 4816 if (lproto->isVariadic() != rproto->isVariadic()) 4817 return QualType(); 4818 4819 if (lproto->getTypeQuals() != rproto->getTypeQuals()) 4820 return QualType(); 4821 4822 // Check argument compatibility 4823 llvm::SmallVector<QualType, 10> types; 4824 for (unsigned i = 0; i < lproto_nargs; i++) { 4825 QualType largtype = lproto->getArgType(i).getUnqualifiedType(); 4826 QualType rargtype = rproto->getArgType(i).getUnqualifiedType(); 4827 QualType argtype = mergeFunctionArgumentTypes(largtype, rargtype, 4828 OfBlockPointer, 4829 Unqualified); 4830 if (argtype.isNull()) return QualType(); 4831 4832 if (Unqualified) 4833 argtype = argtype.getUnqualifiedType(); 4834 4835 types.push_back(argtype); 4836 if (Unqualified) { 4837 largtype = largtype.getUnqualifiedType(); 4838 rargtype = rargtype.getUnqualifiedType(); 4839 } 4840 4841 if (getCanonicalType(argtype) != getCanonicalType(largtype)) 4842 allLTypes = false; 4843 if (getCanonicalType(argtype) != getCanonicalType(rargtype)) 4844 allRTypes = false; 4845 } 4846 if (allLTypes) return lhs; 4847 if (allRTypes) return rhs; 4848 return getFunctionType(retType, types.begin(), types.size(), 4849 lproto->isVariadic(), lproto->getTypeQuals(), 4850 false, false, 0, 0, 4851 FunctionType::ExtInfo(NoReturn, RegParm, lcc)); 4852 } 4853 4854 if (lproto) allRTypes = false; 4855 if (rproto) allLTypes = false; 4856 4857 const FunctionProtoType *proto = lproto ? lproto : rproto; 4858 if (proto) { 4859 assert(!proto->hasExceptionSpec() && "C++ shouldn't be here"); 4860 if (proto->isVariadic()) return QualType(); 4861 // Check that the types are compatible with the types that 4862 // would result from default argument promotions (C99 6.7.5.3p15). 4863 // The only types actually affected are promotable integer 4864 // types and floats, which would be passed as a different 4865 // type depending on whether the prototype is visible. 4866 unsigned proto_nargs = proto->getNumArgs(); 4867 for (unsigned i = 0; i < proto_nargs; ++i) { 4868 QualType argTy = proto->getArgType(i); 4869 4870 // Look at the promotion type of enum types, since that is the type used 4871 // to pass enum values. 4872 if (const EnumType *Enum = argTy->getAs<EnumType>()) 4873 argTy = Enum->getDecl()->getPromotionType(); 4874 4875 if (argTy->isPromotableIntegerType() || 4876 getCanonicalType(argTy).getUnqualifiedType() == FloatTy) 4877 return QualType(); 4878 } 4879 4880 if (allLTypes) return lhs; 4881 if (allRTypes) return rhs; 4882 return getFunctionType(retType, proto->arg_type_begin(), 4883 proto->getNumArgs(), proto->isVariadic(), 4884 proto->getTypeQuals(), 4885 false, false, 0, 0, 4886 FunctionType::ExtInfo(NoReturn, RegParm, lcc)); 4887 } 4888 4889 if (allLTypes) return lhs; 4890 if (allRTypes) return rhs; 4891 FunctionType::ExtInfo Info(NoReturn, RegParm, lcc); 4892 return getFunctionNoProtoType(retType, Info); 4893} 4894 4895QualType ASTContext::mergeTypes(QualType LHS, QualType RHS, 4896 bool OfBlockPointer, 4897 bool Unqualified) { 4898 // C++ [expr]: If an expression initially has the type "reference to T", the 4899 // type is adjusted to "T" prior to any further analysis, the expression 4900 // designates the object or function denoted by the reference, and the 4901 // expression is an lvalue unless the reference is an rvalue reference and 4902 // the expression is a function call (possibly inside parentheses). 4903 assert(!LHS->getAs<ReferenceType>() && "LHS is a reference type?"); 4904 assert(!RHS->getAs<ReferenceType>() && "RHS is a reference type?"); 4905 4906 if (Unqualified) { 4907 LHS = LHS.getUnqualifiedType(); 4908 RHS = RHS.getUnqualifiedType(); 4909 } 4910 4911 QualType LHSCan = getCanonicalType(LHS), 4912 RHSCan = getCanonicalType(RHS); 4913 4914 // If two types are identical, they are compatible. 4915 if (LHSCan == RHSCan) 4916 return LHS; 4917 4918 // If the qualifiers are different, the types aren't compatible... mostly. 4919 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 4920 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 4921 if (LQuals != RQuals) { 4922 // If any of these qualifiers are different, we have a type 4923 // mismatch. 4924 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 4925 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 4926 return QualType(); 4927 4928 // Exactly one GC qualifier difference is allowed: __strong is 4929 // okay if the other type has no GC qualifier but is an Objective 4930 // C object pointer (i.e. implicitly strong by default). We fix 4931 // this by pretending that the unqualified type was actually 4932 // qualified __strong. 4933 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 4934 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 4935 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 4936 4937 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 4938 return QualType(); 4939 4940 if (GC_L == Qualifiers::Strong && RHSCan->isObjCObjectPointerType()) { 4941 return mergeTypes(LHS, getObjCGCQualType(RHS, Qualifiers::Strong)); 4942 } 4943 if (GC_R == Qualifiers::Strong && LHSCan->isObjCObjectPointerType()) { 4944 return mergeTypes(getObjCGCQualType(LHS, Qualifiers::Strong), RHS); 4945 } 4946 return QualType(); 4947 } 4948 4949 // Okay, qualifiers are equal. 4950 4951 Type::TypeClass LHSClass = LHSCan->getTypeClass(); 4952 Type::TypeClass RHSClass = RHSCan->getTypeClass(); 4953 4954 // We want to consider the two function types to be the same for these 4955 // comparisons, just force one to the other. 4956 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto; 4957 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto; 4958 4959 // Same as above for arrays 4960 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray) 4961 LHSClass = Type::ConstantArray; 4962 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray) 4963 RHSClass = Type::ConstantArray; 4964 4965 // ObjCInterfaces are just specialized ObjCObjects. 4966 if (LHSClass == Type::ObjCInterface) LHSClass = Type::ObjCObject; 4967 if (RHSClass == Type::ObjCInterface) RHSClass = Type::ObjCObject; 4968 4969 // Canonicalize ExtVector -> Vector. 4970 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector; 4971 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector; 4972 4973 // If the canonical type classes don't match. 4974 if (LHSClass != RHSClass) { 4975 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char, 4976 // a signed integer type, or an unsigned integer type. 4977 // Compatibility is based on the underlying type, not the promotion 4978 // type. 4979 if (const EnumType* ETy = LHS->getAs<EnumType>()) { 4980 if (ETy->getDecl()->getIntegerType() == RHSCan.getUnqualifiedType()) 4981 return RHS; 4982 } 4983 if (const EnumType* ETy = RHS->getAs<EnumType>()) { 4984 if (ETy->getDecl()->getIntegerType() == LHSCan.getUnqualifiedType()) 4985 return LHS; 4986 } 4987 4988 return QualType(); 4989 } 4990 4991 // The canonical type classes match. 4992 switch (LHSClass) { 4993#define TYPE(Class, Base) 4994#define ABSTRACT_TYPE(Class, Base) 4995#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) case Type::Class: 4996#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 4997#define DEPENDENT_TYPE(Class, Base) case Type::Class: 4998#include "clang/AST/TypeNodes.def" 4999 assert(false && "Non-canonical and dependent types shouldn't get here"); 5000 return QualType(); 5001 5002 case Type::LValueReference: 5003 case Type::RValueReference: 5004 case Type::MemberPointer: 5005 assert(false && "C++ should never be in mergeTypes"); 5006 return QualType(); 5007 5008 case Type::ObjCInterface: 5009 case Type::IncompleteArray: 5010 case Type::VariableArray: 5011 case Type::FunctionProto: 5012 case Type::ExtVector: 5013 assert(false && "Types are eliminated above"); 5014 return QualType(); 5015 5016 case Type::Pointer: 5017 { 5018 // Merge two pointer types, while trying to preserve typedef info 5019 QualType LHSPointee = LHS->getAs<PointerType>()->getPointeeType(); 5020 QualType RHSPointee = RHS->getAs<PointerType>()->getPointeeType(); 5021 if (Unqualified) { 5022 LHSPointee = LHSPointee.getUnqualifiedType(); 5023 RHSPointee = RHSPointee.getUnqualifiedType(); 5024 } 5025 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, false, 5026 Unqualified); 5027 if (ResultType.isNull()) return QualType(); 5028 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 5029 return LHS; 5030 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 5031 return RHS; 5032 return getPointerType(ResultType); 5033 } 5034 case Type::BlockPointer: 5035 { 5036 // Merge two block pointer types, while trying to preserve typedef info 5037 QualType LHSPointee = LHS->getAs<BlockPointerType>()->getPointeeType(); 5038 QualType RHSPointee = RHS->getAs<BlockPointerType>()->getPointeeType(); 5039 if (Unqualified) { 5040 LHSPointee = LHSPointee.getUnqualifiedType(); 5041 RHSPointee = RHSPointee.getUnqualifiedType(); 5042 } 5043 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, OfBlockPointer, 5044 Unqualified); 5045 if (ResultType.isNull()) return QualType(); 5046 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 5047 return LHS; 5048 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 5049 return RHS; 5050 return getBlockPointerType(ResultType); 5051 } 5052 case Type::ConstantArray: 5053 { 5054 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS); 5055 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS); 5056 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize()) 5057 return QualType(); 5058 5059 QualType LHSElem = getAsArrayType(LHS)->getElementType(); 5060 QualType RHSElem = getAsArrayType(RHS)->getElementType(); 5061 if (Unqualified) { 5062 LHSElem = LHSElem.getUnqualifiedType(); 5063 RHSElem = RHSElem.getUnqualifiedType(); 5064 } 5065 5066 QualType ResultType = mergeTypes(LHSElem, RHSElem, false, Unqualified); 5067 if (ResultType.isNull()) return QualType(); 5068 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 5069 return LHS; 5070 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 5071 return RHS; 5072 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(), 5073 ArrayType::ArraySizeModifier(), 0); 5074 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(), 5075 ArrayType::ArraySizeModifier(), 0); 5076 const VariableArrayType* LVAT = getAsVariableArrayType(LHS); 5077 const VariableArrayType* RVAT = getAsVariableArrayType(RHS); 5078 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 5079 return LHS; 5080 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 5081 return RHS; 5082 if (LVAT) { 5083 // FIXME: This isn't correct! But tricky to implement because 5084 // the array's size has to be the size of LHS, but the type 5085 // has to be different. 5086 return LHS; 5087 } 5088 if (RVAT) { 5089 // FIXME: This isn't correct! But tricky to implement because 5090 // the array's size has to be the size of RHS, but the type 5091 // has to be different. 5092 return RHS; 5093 } 5094 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS; 5095 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS; 5096 return getIncompleteArrayType(ResultType, 5097 ArrayType::ArraySizeModifier(), 0); 5098 } 5099 case Type::FunctionNoProto: 5100 return mergeFunctionTypes(LHS, RHS, OfBlockPointer, Unqualified); 5101 case Type::Record: 5102 case Type::Enum: 5103 return QualType(); 5104 case Type::Builtin: 5105 // Only exactly equal builtin types are compatible, which is tested above. 5106 return QualType(); 5107 case Type::Complex: 5108 // Distinct complex types are incompatible. 5109 return QualType(); 5110 case Type::Vector: 5111 // FIXME: The merged type should be an ExtVector! 5112 if (areCompatVectorTypes(LHSCan->getAs<VectorType>(), 5113 RHSCan->getAs<VectorType>())) 5114 return LHS; 5115 return QualType(); 5116 case Type::ObjCObject: { 5117 // Check if the types are assignment compatible. 5118 // FIXME: This should be type compatibility, e.g. whether 5119 // "LHS x; RHS x;" at global scope is legal. 5120 const ObjCObjectType* LHSIface = LHS->getAs<ObjCObjectType>(); 5121 const ObjCObjectType* RHSIface = RHS->getAs<ObjCObjectType>(); 5122 if (canAssignObjCInterfaces(LHSIface, RHSIface)) 5123 return LHS; 5124 5125 return QualType(); 5126 } 5127 case Type::ObjCObjectPointer: { 5128 if (OfBlockPointer) { 5129 if (canAssignObjCInterfacesInBlockPointer( 5130 LHS->getAs<ObjCObjectPointerType>(), 5131 RHS->getAs<ObjCObjectPointerType>())) 5132 return LHS; 5133 return QualType(); 5134 } 5135 if (canAssignObjCInterfaces(LHS->getAs<ObjCObjectPointerType>(), 5136 RHS->getAs<ObjCObjectPointerType>())) 5137 return LHS; 5138 5139 return QualType(); 5140 } 5141 } 5142 5143 return QualType(); 5144} 5145 5146/// mergeObjCGCQualifiers - This routine merges ObjC's GC attribute of 'LHS' and 5147/// 'RHS' attributes and returns the merged version; including for function 5148/// return types. 5149QualType ASTContext::mergeObjCGCQualifiers(QualType LHS, QualType RHS) { 5150 QualType LHSCan = getCanonicalType(LHS), 5151 RHSCan = getCanonicalType(RHS); 5152 // If two types are identical, they are compatible. 5153 if (LHSCan == RHSCan) 5154 return LHS; 5155 if (RHSCan->isFunctionType()) { 5156 if (!LHSCan->isFunctionType()) 5157 return QualType(); 5158 QualType OldReturnType = 5159 cast<FunctionType>(RHSCan.getTypePtr())->getResultType(); 5160 QualType NewReturnType = 5161 cast<FunctionType>(LHSCan.getTypePtr())->getResultType(); 5162 QualType ResReturnType = 5163 mergeObjCGCQualifiers(NewReturnType, OldReturnType); 5164 if (ResReturnType.isNull()) 5165 return QualType(); 5166 if (ResReturnType == NewReturnType || ResReturnType == OldReturnType) { 5167 // id foo(); ... __strong id foo(); or: __strong id foo(); ... id foo(); 5168 // In either case, use OldReturnType to build the new function type. 5169 const FunctionType *F = LHS->getAs<FunctionType>(); 5170 if (const FunctionProtoType *FPT = cast<FunctionProtoType>(F)) { 5171 FunctionType::ExtInfo Info = getFunctionExtInfo(LHS); 5172 QualType ResultType 5173 = getFunctionType(OldReturnType, FPT->arg_type_begin(), 5174 FPT->getNumArgs(), FPT->isVariadic(), 5175 FPT->getTypeQuals(), 5176 FPT->hasExceptionSpec(), 5177 FPT->hasAnyExceptionSpec(), 5178 FPT->getNumExceptions(), 5179 FPT->exception_begin(), 5180 Info); 5181 return ResultType; 5182 } 5183 } 5184 return QualType(); 5185 } 5186 5187 // If the qualifiers are different, the types can still be merged. 5188 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 5189 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 5190 if (LQuals != RQuals) { 5191 // If any of these qualifiers are different, we have a type mismatch. 5192 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 5193 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 5194 return QualType(); 5195 5196 // Exactly one GC qualifier difference is allowed: __strong is 5197 // okay if the other type has no GC qualifier but is an Objective 5198 // C object pointer (i.e. implicitly strong by default). We fix 5199 // this by pretending that the unqualified type was actually 5200 // qualified __strong. 5201 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 5202 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 5203 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 5204 5205 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 5206 return QualType(); 5207 5208 if (GC_L == Qualifiers::Strong) 5209 return LHS; 5210 if (GC_R == Qualifiers::Strong) 5211 return RHS; 5212 return QualType(); 5213 } 5214 5215 if (LHSCan->isObjCObjectPointerType() && RHSCan->isObjCObjectPointerType()) { 5216 QualType LHSBaseQT = LHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 5217 QualType RHSBaseQT = RHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 5218 QualType ResQT = mergeObjCGCQualifiers(LHSBaseQT, RHSBaseQT); 5219 if (ResQT == LHSBaseQT) 5220 return LHS; 5221 if (ResQT == RHSBaseQT) 5222 return RHS; 5223 } 5224 return QualType(); 5225} 5226 5227//===----------------------------------------------------------------------===// 5228// Integer Predicates 5229//===----------------------------------------------------------------------===// 5230 5231unsigned ASTContext::getIntWidth(QualType T) { 5232 if (EnumType *ET = dyn_cast<EnumType>(T)) 5233 T = ET->getDecl()->getIntegerType(); 5234 if (T->isBooleanType()) 5235 return 1; 5236 // For builtin types, just use the standard type sizing method 5237 return (unsigned)getTypeSize(T); 5238} 5239 5240QualType ASTContext::getCorrespondingUnsignedType(QualType T) { 5241 assert(T->hasSignedIntegerRepresentation() && "Unexpected type"); 5242 5243 // Turn <4 x signed int> -> <4 x unsigned int> 5244 if (const VectorType *VTy = T->getAs<VectorType>()) 5245 return getVectorType(getCorrespondingUnsignedType(VTy->getElementType()), 5246 VTy->getNumElements(), VTy->getVectorKind()); 5247 5248 // For enums, we return the unsigned version of the base type. 5249 if (const EnumType *ETy = T->getAs<EnumType>()) 5250 T = ETy->getDecl()->getIntegerType(); 5251 5252 const BuiltinType *BTy = T->getAs<BuiltinType>(); 5253 assert(BTy && "Unexpected signed integer type"); 5254 switch (BTy->getKind()) { 5255 case BuiltinType::Char_S: 5256 case BuiltinType::SChar: 5257 return UnsignedCharTy; 5258 case BuiltinType::Short: 5259 return UnsignedShortTy; 5260 case BuiltinType::Int: 5261 return UnsignedIntTy; 5262 case BuiltinType::Long: 5263 return UnsignedLongTy; 5264 case BuiltinType::LongLong: 5265 return UnsignedLongLongTy; 5266 case BuiltinType::Int128: 5267 return UnsignedInt128Ty; 5268 default: 5269 assert(0 && "Unexpected signed integer type"); 5270 return QualType(); 5271 } 5272} 5273 5274ExternalASTSource::~ExternalASTSource() { } 5275 5276void ExternalASTSource::PrintStats() { } 5277 5278ASTMutationListener::~ASTMutationListener() { } 5279 5280 5281//===----------------------------------------------------------------------===// 5282// Builtin Type Computation 5283//===----------------------------------------------------------------------===// 5284 5285/// DecodeTypeFromStr - This decodes one type descriptor from Str, advancing the 5286/// pointer over the consumed characters. This returns the resultant type. If 5287/// AllowTypeModifiers is false then modifier like * are not parsed, just basic 5288/// types. This allows "v2i*" to be parsed as a pointer to a v2i instead of 5289/// a vector of "i*". 5290/// 5291/// RequiresICE is filled in on return to indicate whether the value is required 5292/// to be an Integer Constant Expression. 5293static QualType DecodeTypeFromStr(const char *&Str, ASTContext &Context, 5294 ASTContext::GetBuiltinTypeError &Error, 5295 bool &RequiresICE, 5296 bool AllowTypeModifiers) { 5297 // Modifiers. 5298 int HowLong = 0; 5299 bool Signed = false, Unsigned = false; 5300 RequiresICE = false; 5301 5302 // Read the prefixed modifiers first. 5303 bool Done = false; 5304 while (!Done) { 5305 switch (*Str++) { 5306 default: Done = true; --Str; break; 5307 case 'I': 5308 RequiresICE = true; 5309 break; 5310 case 'S': 5311 assert(!Unsigned && "Can't use both 'S' and 'U' modifiers!"); 5312 assert(!Signed && "Can't use 'S' modifier multiple times!"); 5313 Signed = true; 5314 break; 5315 case 'U': 5316 assert(!Signed && "Can't use both 'S' and 'U' modifiers!"); 5317 assert(!Unsigned && "Can't use 'S' modifier multiple times!"); 5318 Unsigned = true; 5319 break; 5320 case 'L': 5321 assert(HowLong <= 2 && "Can't have LLLL modifier"); 5322 ++HowLong; 5323 break; 5324 } 5325 } 5326 5327 QualType Type; 5328 5329 // Read the base type. 5330 switch (*Str++) { 5331 default: assert(0 && "Unknown builtin type letter!"); 5332 case 'v': 5333 assert(HowLong == 0 && !Signed && !Unsigned && 5334 "Bad modifiers used with 'v'!"); 5335 Type = Context.VoidTy; 5336 break; 5337 case 'f': 5338 assert(HowLong == 0 && !Signed && !Unsigned && 5339 "Bad modifiers used with 'f'!"); 5340 Type = Context.FloatTy; 5341 break; 5342 case 'd': 5343 assert(HowLong < 2 && !Signed && !Unsigned && 5344 "Bad modifiers used with 'd'!"); 5345 if (HowLong) 5346 Type = Context.LongDoubleTy; 5347 else 5348 Type = Context.DoubleTy; 5349 break; 5350 case 's': 5351 assert(HowLong == 0 && "Bad modifiers used with 's'!"); 5352 if (Unsigned) 5353 Type = Context.UnsignedShortTy; 5354 else 5355 Type = Context.ShortTy; 5356 break; 5357 case 'i': 5358 if (HowLong == 3) 5359 Type = Unsigned ? Context.UnsignedInt128Ty : Context.Int128Ty; 5360 else if (HowLong == 2) 5361 Type = Unsigned ? Context.UnsignedLongLongTy : Context.LongLongTy; 5362 else if (HowLong == 1) 5363 Type = Unsigned ? Context.UnsignedLongTy : Context.LongTy; 5364 else 5365 Type = Unsigned ? Context.UnsignedIntTy : Context.IntTy; 5366 break; 5367 case 'c': 5368 assert(HowLong == 0 && "Bad modifiers used with 'c'!"); 5369 if (Signed) 5370 Type = Context.SignedCharTy; 5371 else if (Unsigned) 5372 Type = Context.UnsignedCharTy; 5373 else 5374 Type = Context.CharTy; 5375 break; 5376 case 'b': // boolean 5377 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'b'!"); 5378 Type = Context.BoolTy; 5379 break; 5380 case 'z': // size_t. 5381 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'z'!"); 5382 Type = Context.getSizeType(); 5383 break; 5384 case 'F': 5385 Type = Context.getCFConstantStringType(); 5386 break; 5387 case 'G': 5388 Type = Context.getObjCIdType(); 5389 break; 5390 case 'H': 5391 Type = Context.getObjCSelType(); 5392 break; 5393 case 'a': 5394 Type = Context.getBuiltinVaListType(); 5395 assert(!Type.isNull() && "builtin va list type not initialized!"); 5396 break; 5397 case 'A': 5398 // This is a "reference" to a va_list; however, what exactly 5399 // this means depends on how va_list is defined. There are two 5400 // different kinds of va_list: ones passed by value, and ones 5401 // passed by reference. An example of a by-value va_list is 5402 // x86, where va_list is a char*. An example of by-ref va_list 5403 // is x86-64, where va_list is a __va_list_tag[1]. For x86, 5404 // we want this argument to be a char*&; for x86-64, we want 5405 // it to be a __va_list_tag*. 5406 Type = Context.getBuiltinVaListType(); 5407 assert(!Type.isNull() && "builtin va list type not initialized!"); 5408 if (Type->isArrayType()) 5409 Type = Context.getArrayDecayedType(Type); 5410 else 5411 Type = Context.getLValueReferenceType(Type); 5412 break; 5413 case 'V': { 5414 char *End; 5415 unsigned NumElements = strtoul(Str, &End, 10); 5416 assert(End != Str && "Missing vector size"); 5417 Str = End; 5418 5419 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, 5420 RequiresICE, false); 5421 assert(!RequiresICE && "Can't require vector ICE"); 5422 5423 // TODO: No way to make AltiVec vectors in builtins yet. 5424 Type = Context.getVectorType(ElementType, NumElements, 5425 VectorType::GenericVector); 5426 break; 5427 } 5428 case 'X': { 5429 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, RequiresICE, 5430 false); 5431 assert(!RequiresICE && "Can't require complex ICE"); 5432 Type = Context.getComplexType(ElementType); 5433 break; 5434 } 5435 case 'P': 5436 Type = Context.getFILEType(); 5437 if (Type.isNull()) { 5438 Error = ASTContext::GE_Missing_stdio; 5439 return QualType(); 5440 } 5441 break; 5442 case 'J': 5443 if (Signed) 5444 Type = Context.getsigjmp_bufType(); 5445 else 5446 Type = Context.getjmp_bufType(); 5447 5448 if (Type.isNull()) { 5449 Error = ASTContext::GE_Missing_setjmp; 5450 return QualType(); 5451 } 5452 break; 5453 } 5454 5455 // If there are modifiers and if we're allowed to parse them, go for it. 5456 Done = !AllowTypeModifiers; 5457 while (!Done) { 5458 switch (char c = *Str++) { 5459 default: Done = true; --Str; break; 5460 case '*': 5461 case '&': { 5462 // Both pointers and references can have their pointee types 5463 // qualified with an address space. 5464 char *End; 5465 unsigned AddrSpace = strtoul(Str, &End, 10); 5466 if (End != Str && AddrSpace != 0) { 5467 Type = Context.getAddrSpaceQualType(Type, AddrSpace); 5468 Str = End; 5469 } 5470 if (c == '*') 5471 Type = Context.getPointerType(Type); 5472 else 5473 Type = Context.getLValueReferenceType(Type); 5474 break; 5475 } 5476 // FIXME: There's no way to have a built-in with an rvalue ref arg. 5477 case 'C': 5478 Type = Type.withConst(); 5479 break; 5480 case 'D': 5481 Type = Context.getVolatileType(Type); 5482 break; 5483 } 5484 } 5485 5486 assert((!RequiresICE || Type->isIntegralOrEnumerationType()) && 5487 "Integer constant 'I' type must be an integer"); 5488 5489 return Type; 5490} 5491 5492/// GetBuiltinType - Return the type for the specified builtin. 5493QualType ASTContext::GetBuiltinType(unsigned Id, 5494 GetBuiltinTypeError &Error, 5495 unsigned *IntegerConstantArgs) { 5496 const char *TypeStr = BuiltinInfo.GetTypeString(Id); 5497 5498 llvm::SmallVector<QualType, 8> ArgTypes; 5499 5500 bool RequiresICE = false; 5501 Error = GE_None; 5502 QualType ResType = DecodeTypeFromStr(TypeStr, *this, Error, 5503 RequiresICE, true); 5504 if (Error != GE_None) 5505 return QualType(); 5506 5507 assert(!RequiresICE && "Result of intrinsic cannot be required to be an ICE"); 5508 5509 while (TypeStr[0] && TypeStr[0] != '.') { 5510 QualType Ty = DecodeTypeFromStr(TypeStr, *this, Error, RequiresICE, true); 5511 if (Error != GE_None) 5512 return QualType(); 5513 5514 // If this argument is required to be an IntegerConstantExpression and the 5515 // caller cares, fill in the bitmask we return. 5516 if (RequiresICE && IntegerConstantArgs) 5517 *IntegerConstantArgs |= 1 << ArgTypes.size(); 5518 5519 // Do array -> pointer decay. The builtin should use the decayed type. 5520 if (Ty->isArrayType()) 5521 Ty = getArrayDecayedType(Ty); 5522 5523 ArgTypes.push_back(Ty); 5524 } 5525 5526 assert((TypeStr[0] != '.' || TypeStr[1] == 0) && 5527 "'.' should only occur at end of builtin type list!"); 5528 5529 // handle untyped/variadic arguments "T c99Style();" or "T cppStyle(...);". 5530 if (ArgTypes.size() == 0 && TypeStr[0] == '.') 5531 return getFunctionNoProtoType(ResType); 5532 5533 // FIXME: Should we create noreturn types? 5534 return getFunctionType(ResType, ArgTypes.data(), ArgTypes.size(), 5535 TypeStr[0] == '.', 0, false, false, 0, 0, 5536 FunctionType::ExtInfo()); 5537} 5538 5539GVALinkage ASTContext::GetGVALinkageForFunction(const FunctionDecl *FD) { 5540 GVALinkage External = GVA_StrongExternal; 5541 5542 Linkage L = FD->getLinkage(); 5543 if (L == ExternalLinkage && getLangOptions().CPlusPlus && 5544 FD->getType()->getLinkage() == UniqueExternalLinkage) 5545 L = UniqueExternalLinkage; 5546 5547 switch (L) { 5548 case NoLinkage: 5549 case InternalLinkage: 5550 case UniqueExternalLinkage: 5551 return GVA_Internal; 5552 5553 case ExternalLinkage: 5554 switch (FD->getTemplateSpecializationKind()) { 5555 case TSK_Undeclared: 5556 case TSK_ExplicitSpecialization: 5557 External = GVA_StrongExternal; 5558 break; 5559 5560 case TSK_ExplicitInstantiationDefinition: 5561 return GVA_ExplicitTemplateInstantiation; 5562 5563 case TSK_ExplicitInstantiationDeclaration: 5564 case TSK_ImplicitInstantiation: 5565 External = GVA_TemplateInstantiation; 5566 break; 5567 } 5568 } 5569 5570 if (!FD->isInlined()) 5571 return External; 5572 5573 if (!getLangOptions().CPlusPlus || FD->hasAttr<GNUInlineAttr>()) { 5574 // GNU or C99 inline semantics. Determine whether this symbol should be 5575 // externally visible. 5576 if (FD->isInlineDefinitionExternallyVisible()) 5577 return External; 5578 5579 // C99 inline semantics, where the symbol is not externally visible. 5580 return GVA_C99Inline; 5581 } 5582 5583 // C++0x [temp.explicit]p9: 5584 // [ Note: The intent is that an inline function that is the subject of 5585 // an explicit instantiation declaration will still be implicitly 5586 // instantiated when used so that the body can be considered for 5587 // inlining, but that no out-of-line copy of the inline function would be 5588 // generated in the translation unit. -- end note ] 5589 if (FD->getTemplateSpecializationKind() 5590 == TSK_ExplicitInstantiationDeclaration) 5591 return GVA_C99Inline; 5592 5593 return GVA_CXXInline; 5594} 5595 5596GVALinkage ASTContext::GetGVALinkageForVariable(const VarDecl *VD) { 5597 // If this is a static data member, compute the kind of template 5598 // specialization. Otherwise, this variable is not part of a 5599 // template. 5600 TemplateSpecializationKind TSK = TSK_Undeclared; 5601 if (VD->isStaticDataMember()) 5602 TSK = VD->getTemplateSpecializationKind(); 5603 5604 Linkage L = VD->getLinkage(); 5605 if (L == ExternalLinkage && getLangOptions().CPlusPlus && 5606 VD->getType()->getLinkage() == UniqueExternalLinkage) 5607 L = UniqueExternalLinkage; 5608 5609 switch (L) { 5610 case NoLinkage: 5611 case InternalLinkage: 5612 case UniqueExternalLinkage: 5613 return GVA_Internal; 5614 5615 case ExternalLinkage: 5616 switch (TSK) { 5617 case TSK_Undeclared: 5618 case TSK_ExplicitSpecialization: 5619 return GVA_StrongExternal; 5620 5621 case TSK_ExplicitInstantiationDeclaration: 5622 llvm_unreachable("Variable should not be instantiated"); 5623 // Fall through to treat this like any other instantiation. 5624 5625 case TSK_ExplicitInstantiationDefinition: 5626 return GVA_ExplicitTemplateInstantiation; 5627 5628 case TSK_ImplicitInstantiation: 5629 return GVA_TemplateInstantiation; 5630 } 5631 } 5632 5633 return GVA_StrongExternal; 5634} 5635 5636bool ASTContext::DeclMustBeEmitted(const Decl *D) { 5637 if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { 5638 if (!VD->isFileVarDecl()) 5639 return false; 5640 } else if (!isa<FunctionDecl>(D)) 5641 return false; 5642 5643 // Weak references don't produce any output by themselves. 5644 if (D->hasAttr<WeakRefAttr>()) 5645 return false; 5646 5647 // Aliases and used decls are required. 5648 if (D->hasAttr<AliasAttr>() || D->hasAttr<UsedAttr>()) 5649 return true; 5650 5651 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 5652 // Forward declarations aren't required. 5653 if (!FD->isThisDeclarationADefinition()) 5654 return false; 5655 5656 // Constructors and destructors are required. 5657 if (FD->hasAttr<ConstructorAttr>() || FD->hasAttr<DestructorAttr>()) 5658 return true; 5659 5660 // The key function for a class is required. 5661 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { 5662 const CXXRecordDecl *RD = MD->getParent(); 5663 if (MD->isOutOfLine() && RD->isDynamicClass()) { 5664 const CXXMethodDecl *KeyFunc = getKeyFunction(RD); 5665 if (KeyFunc && KeyFunc->getCanonicalDecl() == MD->getCanonicalDecl()) 5666 return true; 5667 } 5668 } 5669 5670 GVALinkage Linkage = GetGVALinkageForFunction(FD); 5671 5672 // static, static inline, always_inline, and extern inline functions can 5673 // always be deferred. Normal inline functions can be deferred in C99/C++. 5674 // Implicit template instantiations can also be deferred in C++. 5675 if (Linkage == GVA_Internal || Linkage == GVA_C99Inline || 5676 Linkage == GVA_CXXInline || Linkage == GVA_TemplateInstantiation) 5677 return false; 5678 return true; 5679 } 5680 5681 const VarDecl *VD = cast<VarDecl>(D); 5682 assert(VD->isFileVarDecl() && "Expected file scoped var"); 5683 5684 if (VD->isThisDeclarationADefinition() == VarDecl::DeclarationOnly) 5685 return false; 5686 5687 // Structs that have non-trivial constructors or destructors are required. 5688 5689 // FIXME: Handle references. 5690 if (const RecordType *RT = VD->getType()->getAs<RecordType>()) { 5691 if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(RT->getDecl())) { 5692 if (RD->hasDefinition() && 5693 (!RD->hasTrivialConstructor() || !RD->hasTrivialDestructor())) 5694 return true; 5695 } 5696 } 5697 5698 GVALinkage L = GetGVALinkageForVariable(VD); 5699 if (L == GVA_Internal || L == GVA_TemplateInstantiation) { 5700 if (!(VD->getInit() && VD->getInit()->HasSideEffects(*this))) 5701 return false; 5702 } 5703 5704 return true; 5705} 5706 5707CallingConv ASTContext::getDefaultMethodCallConv() { 5708 // Pass through to the C++ ABI object 5709 return ABI->getDefaultMethodCallConv(); 5710} 5711 5712CXXABI::~CXXABI() {} 5713