ASTContext.cpp revision dcfcfbec478f7ed96cd8d92f30c29bd4e30d5b9c
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/RecordLayout.h" 24#include "clang/Basic/Builtins.h" 25#include "clang/Basic/SourceManager.h" 26#include "clang/Basic/TargetInfo.h" 27#include "llvm/ADT/SmallString.h" 28#include "llvm/ADT/StringExtras.h" 29#include "llvm/Support/MathExtras.h" 30#include "llvm/Support/raw_ostream.h" 31 32using namespace clang; 33 34enum FloatingRank { 35 FloatRank, DoubleRank, LongDoubleRank 36}; 37 38ASTContext::ASTContext(const LangOptions& LOpts, SourceManager &SM, 39 const TargetInfo &t, 40 IdentifierTable &idents, SelectorTable &sels, 41 Builtin::Context &builtins, 42 bool FreeMem, unsigned size_reserve) : 43 GlobalNestedNameSpecifier(0), CFConstantStringTypeDecl(0), 44 NSConstantStringTypeDecl(0), 45 ObjCFastEnumerationStateTypeDecl(0), FILEDecl(0), jmp_bufDecl(0), 46 sigjmp_bufDecl(0), BlockDescriptorType(0), BlockDescriptorExtendedType(0), 47 NullTypeSourceInfo(QualType()), 48 SourceMgr(SM), LangOpts(LOpts), FreeMemory(FreeMem), Target(t), 49 Idents(idents), Selectors(sels), 50 BuiltinInfo(builtins), 51 DeclarationNames(*this), 52 ExternalSource(0), PrintingPolicy(LOpts), 53 LastSDM(0, 0) { 54 ObjCIdRedefinitionType = QualType(); 55 ObjCClassRedefinitionType = QualType(); 56 ObjCSelRedefinitionType = QualType(); 57 if (size_reserve > 0) Types.reserve(size_reserve); 58 TUDecl = TranslationUnitDecl::Create(*this); 59 InitBuiltinTypes(); 60} 61 62ASTContext::~ASTContext() { 63 // Release the DenseMaps associated with DeclContext objects. 64 // FIXME: Is this the ideal solution? 65 ReleaseDeclContextMaps(); 66 67 if (!FreeMemory) { 68 // Call all of the deallocation functions. 69 for (unsigned I = 0, N = Deallocations.size(); I != N; ++I) 70 Deallocations[I].first(Deallocations[I].second); 71 } 72 73 // Release all of the memory associated with overridden C++ methods. 74 for (llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::iterator 75 OM = OverriddenMethods.begin(), OMEnd = OverriddenMethods.end(); 76 OM != OMEnd; ++OM) 77 OM->second.Destroy(); 78 79 if (FreeMemory) { 80 // Deallocate all the types. 81 while (!Types.empty()) { 82 Types.back()->Destroy(*this); 83 Types.pop_back(); 84 } 85 86 for (llvm::FoldingSet<ExtQuals>::iterator 87 I = ExtQualNodes.begin(), E = ExtQualNodes.end(); I != E; ) { 88 // Increment in loop to prevent using deallocated memory. 89 Deallocate(&*I++); 90 } 91 92 for (llvm::DenseMap<const ObjCContainerDecl*, 93 const ASTRecordLayout*>::iterator 94 I = ObjCLayouts.begin(), E = ObjCLayouts.end(); I != E; ) { 95 // Increment in loop to prevent using deallocated memory. 96 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 97 R->Destroy(*this); 98 } 99 } 100 101 // ASTRecordLayout objects in ASTRecordLayouts must always be destroyed 102 // even when using the BumpPtrAllocator because they can contain 103 // DenseMaps. 104 for (llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*>::iterator 105 I = ASTRecordLayouts.begin(), E = ASTRecordLayouts.end(); I != E; ) { 106 // Increment in loop to prevent using deallocated memory. 107 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 108 R->Destroy(*this); 109 } 110 111 // Destroy nested-name-specifiers. 112 for (llvm::FoldingSet<NestedNameSpecifier>::iterator 113 NNS = NestedNameSpecifiers.begin(), 114 NNSEnd = NestedNameSpecifiers.end(); 115 NNS != NNSEnd; ) { 116 // Increment in loop to prevent using deallocated memory. 117 (*NNS++).Destroy(*this); 118 } 119 120 if (GlobalNestedNameSpecifier) 121 GlobalNestedNameSpecifier->Destroy(*this); 122 123 TUDecl->Destroy(*this); 124} 125 126void ASTContext::AddDeallocation(void (*Callback)(void*), void *Data) { 127 Deallocations.push_back(std::make_pair(Callback, Data)); 128} 129 130void 131ASTContext::setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source) { 132 ExternalSource.reset(Source.take()); 133} 134 135void ASTContext::PrintStats() const { 136 fprintf(stderr, "*** AST Context Stats:\n"); 137 fprintf(stderr, " %d types total.\n", (int)Types.size()); 138 139 unsigned counts[] = { 140#define TYPE(Name, Parent) 0, 141#define ABSTRACT_TYPE(Name, Parent) 142#include "clang/AST/TypeNodes.def" 143 0 // Extra 144 }; 145 146 for (unsigned i = 0, e = Types.size(); i != e; ++i) { 147 Type *T = Types[i]; 148 counts[(unsigned)T->getTypeClass()]++; 149 } 150 151 unsigned Idx = 0; 152 unsigned TotalBytes = 0; 153#define TYPE(Name, Parent) \ 154 if (counts[Idx]) \ 155 fprintf(stderr, " %d %s types\n", (int)counts[Idx], #Name); \ 156 TotalBytes += counts[Idx] * sizeof(Name##Type); \ 157 ++Idx; 158#define ABSTRACT_TYPE(Name, Parent) 159#include "clang/AST/TypeNodes.def" 160 161 fprintf(stderr, "Total bytes = %d\n", int(TotalBytes)); 162 163 if (ExternalSource.get()) { 164 fprintf(stderr, "\n"); 165 ExternalSource->PrintStats(); 166 } 167} 168 169 170void ASTContext::InitBuiltinType(CanQualType &R, BuiltinType::Kind K) { 171 BuiltinType *Ty = new (*this, TypeAlignment) BuiltinType(K); 172 R = CanQualType::CreateUnsafe(QualType(Ty, 0)); 173 Types.push_back(Ty); 174} 175 176void ASTContext::InitBuiltinTypes() { 177 assert(VoidTy.isNull() && "Context reinitialized?"); 178 179 // C99 6.2.5p19. 180 InitBuiltinType(VoidTy, BuiltinType::Void); 181 182 // C99 6.2.5p2. 183 InitBuiltinType(BoolTy, BuiltinType::Bool); 184 // C99 6.2.5p3. 185 if (LangOpts.CharIsSigned) 186 InitBuiltinType(CharTy, BuiltinType::Char_S); 187 else 188 InitBuiltinType(CharTy, BuiltinType::Char_U); 189 // C99 6.2.5p4. 190 InitBuiltinType(SignedCharTy, BuiltinType::SChar); 191 InitBuiltinType(ShortTy, BuiltinType::Short); 192 InitBuiltinType(IntTy, BuiltinType::Int); 193 InitBuiltinType(LongTy, BuiltinType::Long); 194 InitBuiltinType(LongLongTy, BuiltinType::LongLong); 195 196 // C99 6.2.5p6. 197 InitBuiltinType(UnsignedCharTy, BuiltinType::UChar); 198 InitBuiltinType(UnsignedShortTy, BuiltinType::UShort); 199 InitBuiltinType(UnsignedIntTy, BuiltinType::UInt); 200 InitBuiltinType(UnsignedLongTy, BuiltinType::ULong); 201 InitBuiltinType(UnsignedLongLongTy, BuiltinType::ULongLong); 202 203 // C99 6.2.5p10. 204 InitBuiltinType(FloatTy, BuiltinType::Float); 205 InitBuiltinType(DoubleTy, BuiltinType::Double); 206 InitBuiltinType(LongDoubleTy, BuiltinType::LongDouble); 207 208 // GNU extension, 128-bit integers. 209 InitBuiltinType(Int128Ty, BuiltinType::Int128); 210 InitBuiltinType(UnsignedInt128Ty, BuiltinType::UInt128); 211 212 if (LangOpts.CPlusPlus) // C++ 3.9.1p5 213 InitBuiltinType(WCharTy, BuiltinType::WChar); 214 else // C99 215 WCharTy = getFromTargetType(Target.getWCharType()); 216 217 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 218 InitBuiltinType(Char16Ty, BuiltinType::Char16); 219 else // C99 220 Char16Ty = getFromTargetType(Target.getChar16Type()); 221 222 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 223 InitBuiltinType(Char32Ty, BuiltinType::Char32); 224 else // C99 225 Char32Ty = getFromTargetType(Target.getChar32Type()); 226 227 // Placeholder type for functions. 228 InitBuiltinType(OverloadTy, BuiltinType::Overload); 229 230 // Placeholder type for type-dependent expressions whose type is 231 // completely unknown. No code should ever check a type against 232 // DependentTy and users should never see it; however, it is here to 233 // help diagnose failures to properly check for type-dependent 234 // expressions. 235 InitBuiltinType(DependentTy, BuiltinType::Dependent); 236 237 // Placeholder type for C++0x auto declarations whose real type has 238 // not yet been deduced. 239 InitBuiltinType(UndeducedAutoTy, BuiltinType::UndeducedAuto); 240 241 // C99 6.2.5p11. 242 FloatComplexTy = getComplexType(FloatTy); 243 DoubleComplexTy = getComplexType(DoubleTy); 244 LongDoubleComplexTy = getComplexType(LongDoubleTy); 245 246 BuiltinVaListType = QualType(); 247 248 // "Builtin" typedefs set by Sema::ActOnTranslationUnitScope(). 249 ObjCIdTypedefType = QualType(); 250 ObjCClassTypedefType = QualType(); 251 ObjCSelTypedefType = QualType(); 252 253 // Builtin types for 'id', 'Class', and 'SEL'. 254 InitBuiltinType(ObjCBuiltinIdTy, BuiltinType::ObjCId); 255 InitBuiltinType(ObjCBuiltinClassTy, BuiltinType::ObjCClass); 256 InitBuiltinType(ObjCBuiltinSelTy, BuiltinType::ObjCSel); 257 258 ObjCConstantStringType = QualType(); 259 260 // void * type 261 VoidPtrTy = getPointerType(VoidTy); 262 263 // nullptr type (C++0x 2.14.7) 264 InitBuiltinType(NullPtrTy, BuiltinType::NullPtr); 265} 266 267MemberSpecializationInfo * 268ASTContext::getInstantiatedFromStaticDataMember(const VarDecl *Var) { 269 assert(Var->isStaticDataMember() && "Not a static data member"); 270 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *>::iterator Pos 271 = InstantiatedFromStaticDataMember.find(Var); 272 if (Pos == InstantiatedFromStaticDataMember.end()) 273 return 0; 274 275 return Pos->second; 276} 277 278void 279ASTContext::setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 280 TemplateSpecializationKind TSK) { 281 assert(Inst->isStaticDataMember() && "Not a static data member"); 282 assert(Tmpl->isStaticDataMember() && "Not a static data member"); 283 assert(!InstantiatedFromStaticDataMember[Inst] && 284 "Already noted what static data member was instantiated from"); 285 InstantiatedFromStaticDataMember[Inst] 286 = new (*this) MemberSpecializationInfo(Tmpl, TSK); 287} 288 289NamedDecl * 290ASTContext::getInstantiatedFromUsingDecl(UsingDecl *UUD) { 291 llvm::DenseMap<UsingDecl *, NamedDecl *>::const_iterator Pos 292 = InstantiatedFromUsingDecl.find(UUD); 293 if (Pos == InstantiatedFromUsingDecl.end()) 294 return 0; 295 296 return Pos->second; 297} 298 299void 300ASTContext::setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern) { 301 assert((isa<UsingDecl>(Pattern) || 302 isa<UnresolvedUsingValueDecl>(Pattern) || 303 isa<UnresolvedUsingTypenameDecl>(Pattern)) && 304 "pattern decl is not a using decl"); 305 assert(!InstantiatedFromUsingDecl[Inst] && "pattern already exists"); 306 InstantiatedFromUsingDecl[Inst] = Pattern; 307} 308 309UsingShadowDecl * 310ASTContext::getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst) { 311 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*>::const_iterator Pos 312 = InstantiatedFromUsingShadowDecl.find(Inst); 313 if (Pos == InstantiatedFromUsingShadowDecl.end()) 314 return 0; 315 316 return Pos->second; 317} 318 319void 320ASTContext::setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 321 UsingShadowDecl *Pattern) { 322 assert(!InstantiatedFromUsingShadowDecl[Inst] && "pattern already exists"); 323 InstantiatedFromUsingShadowDecl[Inst] = Pattern; 324} 325 326FieldDecl *ASTContext::getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field) { 327 llvm::DenseMap<FieldDecl *, FieldDecl *>::iterator Pos 328 = InstantiatedFromUnnamedFieldDecl.find(Field); 329 if (Pos == InstantiatedFromUnnamedFieldDecl.end()) 330 return 0; 331 332 return Pos->second; 333} 334 335void ASTContext::setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, 336 FieldDecl *Tmpl) { 337 assert(!Inst->getDeclName() && "Instantiated field decl is not unnamed"); 338 assert(!Tmpl->getDeclName() && "Template field decl is not unnamed"); 339 assert(!InstantiatedFromUnnamedFieldDecl[Inst] && 340 "Already noted what unnamed field was instantiated from"); 341 342 InstantiatedFromUnnamedFieldDecl[Inst] = Tmpl; 343} 344 345ASTContext::overridden_cxx_method_iterator 346ASTContext::overridden_methods_begin(const CXXMethodDecl *Method) const { 347 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 348 = OverriddenMethods.find(Method); 349 if (Pos == OverriddenMethods.end()) 350 return 0; 351 352 return Pos->second.begin(); 353} 354 355ASTContext::overridden_cxx_method_iterator 356ASTContext::overridden_methods_end(const CXXMethodDecl *Method) const { 357 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 358 = OverriddenMethods.find(Method); 359 if (Pos == OverriddenMethods.end()) 360 return 0; 361 362 return Pos->second.end(); 363} 364 365void ASTContext::addOverriddenMethod(const CXXMethodDecl *Method, 366 const CXXMethodDecl *Overridden) { 367 OverriddenMethods[Method].push_back(Overridden); 368} 369 370namespace { 371 class BeforeInTranslationUnit 372 : std::binary_function<SourceRange, SourceRange, bool> { 373 SourceManager *SourceMgr; 374 375 public: 376 explicit BeforeInTranslationUnit(SourceManager *SM) : SourceMgr(SM) { } 377 378 bool operator()(SourceRange X, SourceRange Y) { 379 return SourceMgr->isBeforeInTranslationUnit(X.getBegin(), Y.getBegin()); 380 } 381 }; 382} 383 384//===----------------------------------------------------------------------===// 385// Type Sizing and Analysis 386//===----------------------------------------------------------------------===// 387 388/// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 389/// scalar floating point type. 390const llvm::fltSemantics &ASTContext::getFloatTypeSemantics(QualType T) const { 391 const BuiltinType *BT = T->getAs<BuiltinType>(); 392 assert(BT && "Not a floating point type!"); 393 switch (BT->getKind()) { 394 default: assert(0 && "Not a floating point type!"); 395 case BuiltinType::Float: return Target.getFloatFormat(); 396 case BuiltinType::Double: return Target.getDoubleFormat(); 397 case BuiltinType::LongDouble: return Target.getLongDoubleFormat(); 398 } 399} 400 401/// getDeclAlign - Return a conservative estimate of the alignment of the 402/// specified decl. Note that bitfields do not have a valid alignment, so 403/// this method will assert on them. 404/// If @p RefAsPointee, references are treated like their underlying type 405/// (for alignof), else they're treated like pointers (for CodeGen). 406CharUnits ASTContext::getDeclAlign(const Decl *D, bool RefAsPointee) { 407 unsigned Align = Target.getCharWidth(); 408 409 if (const AlignedAttr* AA = D->getAttr<AlignedAttr>()) 410 Align = std::max(Align, AA->getMaxAlignment()); 411 412 if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) { 413 QualType T = VD->getType(); 414 if (const ReferenceType* RT = T->getAs<ReferenceType>()) { 415 if (RefAsPointee) 416 T = RT->getPointeeType(); 417 else 418 T = getPointerType(RT->getPointeeType()); 419 } 420 if (!T->isIncompleteType() && !T->isFunctionType()) { 421 unsigned MinWidth = Target.getLargeArrayMinWidth(); 422 unsigned ArrayAlign = Target.getLargeArrayAlign(); 423 if (isa<VariableArrayType>(T) && MinWidth != 0) 424 Align = std::max(Align, ArrayAlign); 425 if (ConstantArrayType *CT = dyn_cast<ConstantArrayType>(T)) { 426 unsigned Size = getTypeSize(CT); 427 if (MinWidth != 0 && MinWidth <= Size) 428 Align = std::max(Align, ArrayAlign); 429 } 430 // Incomplete or function types default to 1. 431 while (isa<VariableArrayType>(T) || isa<IncompleteArrayType>(T)) 432 T = cast<ArrayType>(T)->getElementType(); 433 434 Align = std::max(Align, getPreferredTypeAlign(T.getTypePtr())); 435 } 436 if (const FieldDecl *FD = dyn_cast<FieldDecl>(VD)) { 437 // In the case of a field in a packed struct, we want the minimum 438 // of the alignment of the field and the alignment of the struct. 439 Align = std::min(Align, 440 getPreferredTypeAlign(FD->getParent()->getTypeForDecl())); 441 } 442 } 443 444 return CharUnits::fromQuantity(Align / Target.getCharWidth()); 445} 446 447std::pair<CharUnits, CharUnits> 448ASTContext::getTypeInfoInChars(const Type *T) { 449 std::pair<uint64_t, unsigned> Info = getTypeInfo(T); 450 return std::make_pair(CharUnits::fromQuantity(Info.first / getCharWidth()), 451 CharUnits::fromQuantity(Info.second / getCharWidth())); 452} 453 454std::pair<CharUnits, CharUnits> 455ASTContext::getTypeInfoInChars(QualType T) { 456 return getTypeInfoInChars(T.getTypePtr()); 457} 458 459/// getTypeSize - Return the size of the specified type, in bits. This method 460/// does not work on incomplete types. 461/// 462/// FIXME: Pointers into different addr spaces could have different sizes and 463/// alignment requirements: getPointerInfo should take an AddrSpace, this 464/// should take a QualType, &c. 465std::pair<uint64_t, unsigned> 466ASTContext::getTypeInfo(const Type *T) { 467 uint64_t Width=0; 468 unsigned Align=8; 469 switch (T->getTypeClass()) { 470#define TYPE(Class, Base) 471#define ABSTRACT_TYPE(Class, Base) 472#define NON_CANONICAL_TYPE(Class, Base) 473#define DEPENDENT_TYPE(Class, Base) case Type::Class: 474#include "clang/AST/TypeNodes.def" 475 assert(false && "Should not see dependent types"); 476 break; 477 478 case Type::FunctionNoProto: 479 case Type::FunctionProto: 480 // GCC extension: alignof(function) = 32 bits 481 Width = 0; 482 Align = 32; 483 break; 484 485 case Type::IncompleteArray: 486 case Type::VariableArray: 487 Width = 0; 488 Align = getTypeAlign(cast<ArrayType>(T)->getElementType()); 489 break; 490 491 case Type::ConstantArray: { 492 const ConstantArrayType *CAT = cast<ConstantArrayType>(T); 493 494 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(CAT->getElementType()); 495 Width = EltInfo.first*CAT->getSize().getZExtValue(); 496 Align = EltInfo.second; 497 break; 498 } 499 case Type::ExtVector: 500 case Type::Vector: { 501 const VectorType *VT = cast<VectorType>(T); 502 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(VT->getElementType()); 503 Width = EltInfo.first*VT->getNumElements(); 504 Align = Width; 505 // If the alignment is not a power of 2, round up to the next power of 2. 506 // This happens for non-power-of-2 length vectors. 507 if (Align & (Align-1)) { 508 Align = llvm::NextPowerOf2(Align); 509 Width = llvm::RoundUpToAlignment(Width, Align); 510 } 511 break; 512 } 513 514 case Type::Builtin: 515 switch (cast<BuiltinType>(T)->getKind()) { 516 default: assert(0 && "Unknown builtin type!"); 517 case BuiltinType::Void: 518 // GCC extension: alignof(void) = 8 bits. 519 Width = 0; 520 Align = 8; 521 break; 522 523 case BuiltinType::Bool: 524 Width = Target.getBoolWidth(); 525 Align = Target.getBoolAlign(); 526 break; 527 case BuiltinType::Char_S: 528 case BuiltinType::Char_U: 529 case BuiltinType::UChar: 530 case BuiltinType::SChar: 531 Width = Target.getCharWidth(); 532 Align = Target.getCharAlign(); 533 break; 534 case BuiltinType::WChar: 535 Width = Target.getWCharWidth(); 536 Align = Target.getWCharAlign(); 537 break; 538 case BuiltinType::Char16: 539 Width = Target.getChar16Width(); 540 Align = Target.getChar16Align(); 541 break; 542 case BuiltinType::Char32: 543 Width = Target.getChar32Width(); 544 Align = Target.getChar32Align(); 545 break; 546 case BuiltinType::UShort: 547 case BuiltinType::Short: 548 Width = Target.getShortWidth(); 549 Align = Target.getShortAlign(); 550 break; 551 case BuiltinType::UInt: 552 case BuiltinType::Int: 553 Width = Target.getIntWidth(); 554 Align = Target.getIntAlign(); 555 break; 556 case BuiltinType::ULong: 557 case BuiltinType::Long: 558 Width = Target.getLongWidth(); 559 Align = Target.getLongAlign(); 560 break; 561 case BuiltinType::ULongLong: 562 case BuiltinType::LongLong: 563 Width = Target.getLongLongWidth(); 564 Align = Target.getLongLongAlign(); 565 break; 566 case BuiltinType::Int128: 567 case BuiltinType::UInt128: 568 Width = 128; 569 Align = 128; // int128_t is 128-bit aligned on all targets. 570 break; 571 case BuiltinType::Float: 572 Width = Target.getFloatWidth(); 573 Align = Target.getFloatAlign(); 574 break; 575 case BuiltinType::Double: 576 Width = Target.getDoubleWidth(); 577 Align = Target.getDoubleAlign(); 578 break; 579 case BuiltinType::LongDouble: 580 Width = Target.getLongDoubleWidth(); 581 Align = Target.getLongDoubleAlign(); 582 break; 583 case BuiltinType::NullPtr: 584 Width = Target.getPointerWidth(0); // C++ 3.9.1p11: sizeof(nullptr_t) 585 Align = Target.getPointerAlign(0); // == sizeof(void*) 586 break; 587 } 588 break; 589 case Type::ObjCObjectPointer: 590 Width = Target.getPointerWidth(0); 591 Align = Target.getPointerAlign(0); 592 break; 593 case Type::BlockPointer: { 594 unsigned AS = cast<BlockPointerType>(T)->getPointeeType().getAddressSpace(); 595 Width = Target.getPointerWidth(AS); 596 Align = Target.getPointerAlign(AS); 597 break; 598 } 599 case Type::LValueReference: 600 case Type::RValueReference: { 601 // alignof and sizeof should never enter this code path here, so we go 602 // the pointer route. 603 unsigned AS = cast<ReferenceType>(T)->getPointeeType().getAddressSpace(); 604 Width = Target.getPointerWidth(AS); 605 Align = Target.getPointerAlign(AS); 606 break; 607 } 608 case Type::Pointer: { 609 unsigned AS = cast<PointerType>(T)->getPointeeType().getAddressSpace(); 610 Width = Target.getPointerWidth(AS); 611 Align = Target.getPointerAlign(AS); 612 break; 613 } 614 case Type::MemberPointer: { 615 QualType Pointee = cast<MemberPointerType>(T)->getPointeeType(); 616 std::pair<uint64_t, unsigned> PtrDiffInfo = 617 getTypeInfo(getPointerDiffType()); 618 Width = PtrDiffInfo.first; 619 if (Pointee->isFunctionType()) 620 Width *= 2; 621 Align = PtrDiffInfo.second; 622 break; 623 } 624 case Type::Complex: { 625 // Complex types have the same alignment as their elements, but twice the 626 // size. 627 std::pair<uint64_t, unsigned> EltInfo = 628 getTypeInfo(cast<ComplexType>(T)->getElementType()); 629 Width = EltInfo.first*2; 630 Align = EltInfo.second; 631 break; 632 } 633 case Type::ObjCObject: 634 return getTypeInfo(cast<ObjCObjectType>(T)->getBaseType().getTypePtr()); 635 case Type::ObjCInterface: { 636 const ObjCInterfaceType *ObjCI = cast<ObjCInterfaceType>(T); 637 const ASTRecordLayout &Layout = getASTObjCInterfaceLayout(ObjCI->getDecl()); 638 Width = Layout.getSize(); 639 Align = Layout.getAlignment(); 640 break; 641 } 642 case Type::Record: 643 case Type::Enum: { 644 const TagType *TT = cast<TagType>(T); 645 646 if (TT->getDecl()->isInvalidDecl()) { 647 Width = 1; 648 Align = 1; 649 break; 650 } 651 652 if (const EnumType *ET = dyn_cast<EnumType>(TT)) 653 return getTypeInfo(ET->getDecl()->getIntegerType()); 654 655 const RecordType *RT = cast<RecordType>(TT); 656 const ASTRecordLayout &Layout = getASTRecordLayout(RT->getDecl()); 657 Width = Layout.getSize(); 658 Align = Layout.getAlignment(); 659 break; 660 } 661 662 case Type::SubstTemplateTypeParm: 663 return getTypeInfo(cast<SubstTemplateTypeParmType>(T)-> 664 getReplacementType().getTypePtr()); 665 666 case Type::Typedef: { 667 const TypedefDecl *Typedef = cast<TypedefType>(T)->getDecl(); 668 if (const AlignedAttr *Aligned = Typedef->getAttr<AlignedAttr>()) { 669 Align = std::max(Aligned->getMaxAlignment(), 670 getTypeAlign(Typedef->getUnderlyingType().getTypePtr())); 671 Width = getTypeSize(Typedef->getUnderlyingType().getTypePtr()); 672 } else 673 return getTypeInfo(Typedef->getUnderlyingType().getTypePtr()); 674 break; 675 } 676 677 case Type::TypeOfExpr: 678 return getTypeInfo(cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType() 679 .getTypePtr()); 680 681 case Type::TypeOf: 682 return getTypeInfo(cast<TypeOfType>(T)->getUnderlyingType().getTypePtr()); 683 684 case Type::Decltype: 685 return getTypeInfo(cast<DecltypeType>(T)->getUnderlyingExpr()->getType() 686 .getTypePtr()); 687 688 case Type::Elaborated: 689 return getTypeInfo(cast<ElaboratedType>(T)->getNamedType().getTypePtr()); 690 691 case Type::TemplateSpecialization: 692 assert(getCanonicalType(T) != T && 693 "Cannot request the size of a dependent type"); 694 // FIXME: this is likely to be wrong once we support template 695 // aliases, since a template alias could refer to a typedef that 696 // has an __aligned__ attribute on it. 697 return getTypeInfo(getCanonicalType(T)); 698 } 699 700 assert(Align && (Align & (Align-1)) == 0 && "Alignment must be power of 2"); 701 return std::make_pair(Width, Align); 702} 703 704/// getTypeSizeInChars - Return the size of the specified type, in characters. 705/// This method does not work on incomplete types. 706CharUnits ASTContext::getTypeSizeInChars(QualType T) { 707 return CharUnits::fromQuantity(getTypeSize(T) / getCharWidth()); 708} 709CharUnits ASTContext::getTypeSizeInChars(const Type *T) { 710 return CharUnits::fromQuantity(getTypeSize(T) / getCharWidth()); 711} 712 713/// getTypeAlignInChars - Return the ABI-specified alignment of a type, in 714/// characters. This method does not work on incomplete types. 715CharUnits ASTContext::getTypeAlignInChars(QualType T) { 716 return CharUnits::fromQuantity(getTypeAlign(T) / getCharWidth()); 717} 718CharUnits ASTContext::getTypeAlignInChars(const Type *T) { 719 return CharUnits::fromQuantity(getTypeAlign(T) / getCharWidth()); 720} 721 722/// getPreferredTypeAlign - Return the "preferred" alignment of the specified 723/// type for the current target in bits. This can be different than the ABI 724/// alignment in cases where it is beneficial for performance to overalign 725/// a data type. 726unsigned ASTContext::getPreferredTypeAlign(const Type *T) { 727 unsigned ABIAlign = getTypeAlign(T); 728 729 // Double and long long should be naturally aligned if possible. 730 if (const ComplexType* CT = T->getAs<ComplexType>()) 731 T = CT->getElementType().getTypePtr(); 732 if (T->isSpecificBuiltinType(BuiltinType::Double) || 733 T->isSpecificBuiltinType(BuiltinType::LongLong)) 734 return std::max(ABIAlign, (unsigned)getTypeSize(T)); 735 736 return ABIAlign; 737} 738 739static void CollectLocalObjCIvars(ASTContext *Ctx, 740 const ObjCInterfaceDecl *OI, 741 llvm::SmallVectorImpl<FieldDecl*> &Fields) { 742 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 743 E = OI->ivar_end(); I != E; ++I) { 744 ObjCIvarDecl *IVDecl = *I; 745 if (!IVDecl->isInvalidDecl()) 746 Fields.push_back(cast<FieldDecl>(IVDecl)); 747 } 748} 749 750void ASTContext::CollectObjCIvars(const ObjCInterfaceDecl *OI, 751 llvm::SmallVectorImpl<FieldDecl*> &Fields) { 752 if (const ObjCInterfaceDecl *SuperClass = OI->getSuperClass()) 753 CollectObjCIvars(SuperClass, Fields); 754 CollectLocalObjCIvars(this, OI, Fields); 755} 756 757/// ShallowCollectObjCIvars - 758/// Collect all ivars, including those synthesized, in the current class. 759/// 760void ASTContext::ShallowCollectObjCIvars(const ObjCInterfaceDecl *OI, 761 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 762 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 763 E = OI->ivar_end(); I != E; ++I) { 764 Ivars.push_back(*I); 765 } 766 767 CollectNonClassIvars(OI, Ivars); 768} 769 770/// CollectNonClassIvars - 771/// This routine collects all other ivars which are not declared in the class. 772/// This includes synthesized ivars (via @synthesize) and those in 773// class's @implementation. 774/// 775void ASTContext::CollectNonClassIvars(const ObjCInterfaceDecl *OI, 776 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 777 // Find ivars declared in class extension. 778 if (const ObjCCategoryDecl *CDecl = OI->getClassExtension()) { 779 for (ObjCCategoryDecl::ivar_iterator I = CDecl->ivar_begin(), 780 E = CDecl->ivar_end(); I != E; ++I) { 781 Ivars.push_back(*I); 782 } 783 } 784 785 // Also add any ivar defined in this class's implementation. This 786 // includes synthesized ivars. 787 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) { 788 for (ObjCImplementationDecl::ivar_iterator I = ImplDecl->ivar_begin(), 789 E = ImplDecl->ivar_end(); I != E; ++I) 790 Ivars.push_back(*I); 791 } 792} 793 794/// CollectInheritedProtocols - Collect all protocols in current class and 795/// those inherited by it. 796void ASTContext::CollectInheritedProtocols(const Decl *CDecl, 797 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols) { 798 if (const ObjCInterfaceDecl *OI = dyn_cast<ObjCInterfaceDecl>(CDecl)) { 799 for (ObjCInterfaceDecl::protocol_iterator P = OI->protocol_begin(), 800 PE = OI->protocol_end(); P != PE; ++P) { 801 ObjCProtocolDecl *Proto = (*P); 802 Protocols.insert(Proto); 803 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 804 PE = Proto->protocol_end(); P != PE; ++P) { 805 Protocols.insert(*P); 806 CollectInheritedProtocols(*P, Protocols); 807 } 808 } 809 810 // Categories of this Interface. 811 for (const ObjCCategoryDecl *CDeclChain = OI->getCategoryList(); 812 CDeclChain; CDeclChain = CDeclChain->getNextClassCategory()) 813 CollectInheritedProtocols(CDeclChain, Protocols); 814 if (ObjCInterfaceDecl *SD = OI->getSuperClass()) 815 while (SD) { 816 CollectInheritedProtocols(SD, Protocols); 817 SD = SD->getSuperClass(); 818 } 819 } else if (const ObjCCategoryDecl *OC = dyn_cast<ObjCCategoryDecl>(CDecl)) { 820 for (ObjCInterfaceDecl::protocol_iterator P = OC->protocol_begin(), 821 PE = OC->protocol_end(); P != PE; ++P) { 822 ObjCProtocolDecl *Proto = (*P); 823 Protocols.insert(Proto); 824 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 825 PE = Proto->protocol_end(); P != PE; ++P) 826 CollectInheritedProtocols(*P, Protocols); 827 } 828 } else if (const ObjCProtocolDecl *OP = dyn_cast<ObjCProtocolDecl>(CDecl)) { 829 for (ObjCProtocolDecl::protocol_iterator P = OP->protocol_begin(), 830 PE = OP->protocol_end(); P != PE; ++P) { 831 ObjCProtocolDecl *Proto = (*P); 832 Protocols.insert(Proto); 833 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 834 PE = Proto->protocol_end(); P != PE; ++P) 835 CollectInheritedProtocols(*P, Protocols); 836 } 837 } 838} 839 840unsigned ASTContext::CountNonClassIvars(const ObjCInterfaceDecl *OI) { 841 unsigned count = 0; 842 // Count ivars declared in class extension. 843 if (const ObjCCategoryDecl *CDecl = OI->getClassExtension()) 844 count += CDecl->ivar_size(); 845 846 // Count ivar defined in this class's implementation. This 847 // includes synthesized ivars. 848 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) 849 count += ImplDecl->ivar_size(); 850 851 return count; 852} 853 854/// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 855ObjCImplementationDecl *ASTContext::getObjCImplementation(ObjCInterfaceDecl *D) { 856 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 857 I = ObjCImpls.find(D); 858 if (I != ObjCImpls.end()) 859 return cast<ObjCImplementationDecl>(I->second); 860 return 0; 861} 862/// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 863ObjCCategoryImplDecl *ASTContext::getObjCImplementation(ObjCCategoryDecl *D) { 864 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 865 I = ObjCImpls.find(D); 866 if (I != ObjCImpls.end()) 867 return cast<ObjCCategoryImplDecl>(I->second); 868 return 0; 869} 870 871/// \brief Set the implementation of ObjCInterfaceDecl. 872void ASTContext::setObjCImplementation(ObjCInterfaceDecl *IFaceD, 873 ObjCImplementationDecl *ImplD) { 874 assert(IFaceD && ImplD && "Passed null params"); 875 ObjCImpls[IFaceD] = ImplD; 876} 877/// \brief Set the implementation of ObjCCategoryDecl. 878void ASTContext::setObjCImplementation(ObjCCategoryDecl *CatD, 879 ObjCCategoryImplDecl *ImplD) { 880 assert(CatD && ImplD && "Passed null params"); 881 ObjCImpls[CatD] = ImplD; 882} 883 884/// \brief Allocate an uninitialized TypeSourceInfo. 885/// 886/// The caller should initialize the memory held by TypeSourceInfo using 887/// the TypeLoc wrappers. 888/// 889/// \param T the type that will be the basis for type source info. This type 890/// should refer to how the declarator was written in source code, not to 891/// what type semantic analysis resolved the declarator to. 892TypeSourceInfo *ASTContext::CreateTypeSourceInfo(QualType T, 893 unsigned DataSize) { 894 if (!DataSize) 895 DataSize = TypeLoc::getFullDataSizeForType(T); 896 else 897 assert(DataSize == TypeLoc::getFullDataSizeForType(T) && 898 "incorrect data size provided to CreateTypeSourceInfo!"); 899 900 TypeSourceInfo *TInfo = 901 (TypeSourceInfo*)BumpAlloc.Allocate(sizeof(TypeSourceInfo) + DataSize, 8); 902 new (TInfo) TypeSourceInfo(T); 903 return TInfo; 904} 905 906TypeSourceInfo *ASTContext::getTrivialTypeSourceInfo(QualType T, 907 SourceLocation L) { 908 TypeSourceInfo *DI = CreateTypeSourceInfo(T); 909 DI->getTypeLoc().initialize(L); 910 return DI; 911} 912 913const ASTRecordLayout & 914ASTContext::getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) { 915 return getObjCLayout(D, 0); 916} 917 918const ASTRecordLayout & 919ASTContext::getASTObjCImplementationLayout(const ObjCImplementationDecl *D) { 920 return getObjCLayout(D->getClassInterface(), D); 921} 922 923//===----------------------------------------------------------------------===// 924// Type creation/memoization methods 925//===----------------------------------------------------------------------===// 926 927QualType ASTContext::getExtQualType(const Type *TypeNode, Qualifiers Quals) { 928 unsigned Fast = Quals.getFastQualifiers(); 929 Quals.removeFastQualifiers(); 930 931 // Check if we've already instantiated this type. 932 llvm::FoldingSetNodeID ID; 933 ExtQuals::Profile(ID, TypeNode, Quals); 934 void *InsertPos = 0; 935 if (ExtQuals *EQ = ExtQualNodes.FindNodeOrInsertPos(ID, InsertPos)) { 936 assert(EQ->getQualifiers() == Quals); 937 QualType T = QualType(EQ, Fast); 938 return T; 939 } 940 941 ExtQuals *New = new (*this, TypeAlignment) ExtQuals(*this, TypeNode, Quals); 942 ExtQualNodes.InsertNode(New, InsertPos); 943 QualType T = QualType(New, Fast); 944 return T; 945} 946 947QualType ASTContext::getVolatileType(QualType T) { 948 QualType CanT = getCanonicalType(T); 949 if (CanT.isVolatileQualified()) return T; 950 951 QualifierCollector Quals; 952 const Type *TypeNode = Quals.strip(T); 953 Quals.addVolatile(); 954 955 return getExtQualType(TypeNode, Quals); 956} 957 958QualType ASTContext::getAddrSpaceQualType(QualType T, unsigned AddressSpace) { 959 QualType CanT = getCanonicalType(T); 960 if (CanT.getAddressSpace() == AddressSpace) 961 return T; 962 963 // If we are composing extended qualifiers together, merge together 964 // into one ExtQuals node. 965 QualifierCollector Quals; 966 const Type *TypeNode = Quals.strip(T); 967 968 // If this type already has an address space specified, it cannot get 969 // another one. 970 assert(!Quals.hasAddressSpace() && 971 "Type cannot be in multiple addr spaces!"); 972 Quals.addAddressSpace(AddressSpace); 973 974 return getExtQualType(TypeNode, Quals); 975} 976 977QualType ASTContext::getObjCGCQualType(QualType T, 978 Qualifiers::GC GCAttr) { 979 QualType CanT = getCanonicalType(T); 980 if (CanT.getObjCGCAttr() == GCAttr) 981 return T; 982 983 if (T->isPointerType()) { 984 QualType Pointee = T->getAs<PointerType>()->getPointeeType(); 985 if (Pointee->isAnyPointerType()) { 986 QualType ResultType = getObjCGCQualType(Pointee, GCAttr); 987 return getPointerType(ResultType); 988 } 989 } 990 991 // If we are composing extended qualifiers together, merge together 992 // into one ExtQuals node. 993 QualifierCollector Quals; 994 const Type *TypeNode = Quals.strip(T); 995 996 // If this type already has an ObjCGC specified, it cannot get 997 // another one. 998 assert(!Quals.hasObjCGCAttr() && 999 "Type cannot have multiple ObjCGCs!"); 1000 Quals.addObjCGCAttr(GCAttr); 1001 1002 return getExtQualType(TypeNode, Quals); 1003} 1004 1005static QualType getExtFunctionType(ASTContext& Context, QualType T, 1006 const FunctionType::ExtInfo &Info) { 1007 QualType ResultType; 1008 if (const PointerType *Pointer = T->getAs<PointerType>()) { 1009 QualType Pointee = Pointer->getPointeeType(); 1010 ResultType = getExtFunctionType(Context, Pointee, Info); 1011 if (ResultType == Pointee) 1012 return T; 1013 1014 ResultType = Context.getPointerType(ResultType); 1015 } else if (const BlockPointerType *BlockPointer 1016 = T->getAs<BlockPointerType>()) { 1017 QualType Pointee = BlockPointer->getPointeeType(); 1018 ResultType = getExtFunctionType(Context, Pointee, Info); 1019 if (ResultType == Pointee) 1020 return T; 1021 1022 ResultType = Context.getBlockPointerType(ResultType); 1023 } else if (const FunctionType *F = T->getAs<FunctionType>()) { 1024 if (F->getExtInfo() == Info) 1025 return T; 1026 1027 if (const FunctionNoProtoType *FNPT = dyn_cast<FunctionNoProtoType>(F)) { 1028 ResultType = Context.getFunctionNoProtoType(FNPT->getResultType(), 1029 Info); 1030 } else { 1031 const FunctionProtoType *FPT = cast<FunctionProtoType>(F); 1032 ResultType 1033 = Context.getFunctionType(FPT->getResultType(), FPT->arg_type_begin(), 1034 FPT->getNumArgs(), FPT->isVariadic(), 1035 FPT->getTypeQuals(), 1036 FPT->hasExceptionSpec(), 1037 FPT->hasAnyExceptionSpec(), 1038 FPT->getNumExceptions(), 1039 FPT->exception_begin(), 1040 Info); 1041 } 1042 } else 1043 return T; 1044 1045 return Context.getQualifiedType(ResultType, T.getLocalQualifiers()); 1046} 1047 1048QualType ASTContext::getNoReturnType(QualType T, bool AddNoReturn) { 1049 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1050 return getExtFunctionType(*this, T, 1051 Info.withNoReturn(AddNoReturn)); 1052} 1053 1054QualType ASTContext::getCallConvType(QualType T, CallingConv CallConv) { 1055 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1056 return getExtFunctionType(*this, T, 1057 Info.withCallingConv(CallConv)); 1058} 1059 1060QualType ASTContext::getRegParmType(QualType T, unsigned RegParm) { 1061 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1062 return getExtFunctionType(*this, T, 1063 Info.withRegParm(RegParm)); 1064} 1065 1066/// getComplexType - Return the uniqued reference to the type for a complex 1067/// number with the specified element type. 1068QualType ASTContext::getComplexType(QualType T) { 1069 // Unique pointers, to guarantee there is only one pointer of a particular 1070 // structure. 1071 llvm::FoldingSetNodeID ID; 1072 ComplexType::Profile(ID, T); 1073 1074 void *InsertPos = 0; 1075 if (ComplexType *CT = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos)) 1076 return QualType(CT, 0); 1077 1078 // If the pointee type isn't canonical, this won't be a canonical type either, 1079 // so fill in the canonical type field. 1080 QualType Canonical; 1081 if (!T.isCanonical()) { 1082 Canonical = getComplexType(getCanonicalType(T)); 1083 1084 // Get the new insert position for the node we care about. 1085 ComplexType *NewIP = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos); 1086 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1087 } 1088 ComplexType *New = new (*this, TypeAlignment) ComplexType(T, Canonical); 1089 Types.push_back(New); 1090 ComplexTypes.InsertNode(New, InsertPos); 1091 return QualType(New, 0); 1092} 1093 1094/// getPointerType - Return the uniqued reference to the type for a pointer to 1095/// the specified type. 1096QualType ASTContext::getPointerType(QualType T) { 1097 // Unique pointers, to guarantee there is only one pointer of a particular 1098 // structure. 1099 llvm::FoldingSetNodeID ID; 1100 PointerType::Profile(ID, T); 1101 1102 void *InsertPos = 0; 1103 if (PointerType *PT = PointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1104 return QualType(PT, 0); 1105 1106 // If the pointee type isn't canonical, this won't be a canonical type either, 1107 // so fill in the canonical type field. 1108 QualType Canonical; 1109 if (!T.isCanonical()) { 1110 Canonical = getPointerType(getCanonicalType(T)); 1111 1112 // Get the new insert position for the node we care about. 1113 PointerType *NewIP = PointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1114 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1115 } 1116 PointerType *New = new (*this, TypeAlignment) PointerType(T, Canonical); 1117 Types.push_back(New); 1118 PointerTypes.InsertNode(New, InsertPos); 1119 return QualType(New, 0); 1120} 1121 1122/// getBlockPointerType - Return the uniqued reference to the type for 1123/// a pointer to the specified block. 1124QualType ASTContext::getBlockPointerType(QualType T) { 1125 assert(T->isFunctionType() && "block of function types only"); 1126 // Unique pointers, to guarantee there is only one block of a particular 1127 // structure. 1128 llvm::FoldingSetNodeID ID; 1129 BlockPointerType::Profile(ID, T); 1130 1131 void *InsertPos = 0; 1132 if (BlockPointerType *PT = 1133 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1134 return QualType(PT, 0); 1135 1136 // If the block pointee type isn't canonical, this won't be a canonical 1137 // type either so fill in the canonical type field. 1138 QualType Canonical; 1139 if (!T.isCanonical()) { 1140 Canonical = getBlockPointerType(getCanonicalType(T)); 1141 1142 // Get the new insert position for the node we care about. 1143 BlockPointerType *NewIP = 1144 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1145 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1146 } 1147 BlockPointerType *New 1148 = new (*this, TypeAlignment) BlockPointerType(T, Canonical); 1149 Types.push_back(New); 1150 BlockPointerTypes.InsertNode(New, InsertPos); 1151 return QualType(New, 0); 1152} 1153 1154/// getLValueReferenceType - Return the uniqued reference to the type for an 1155/// lvalue reference to the specified type. 1156QualType ASTContext::getLValueReferenceType(QualType T, bool SpelledAsLValue) { 1157 // Unique pointers, to guarantee there is only one pointer of a particular 1158 // structure. 1159 llvm::FoldingSetNodeID ID; 1160 ReferenceType::Profile(ID, T, SpelledAsLValue); 1161 1162 void *InsertPos = 0; 1163 if (LValueReferenceType *RT = 1164 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1165 return QualType(RT, 0); 1166 1167 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1168 1169 // If the referencee type isn't canonical, this won't be a canonical type 1170 // either, so fill in the canonical type field. 1171 QualType Canonical; 1172 if (!SpelledAsLValue || InnerRef || !T.isCanonical()) { 1173 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1174 Canonical = getLValueReferenceType(getCanonicalType(PointeeType)); 1175 1176 // Get the new insert position for the node we care about. 1177 LValueReferenceType *NewIP = 1178 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1179 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1180 } 1181 1182 LValueReferenceType *New 1183 = new (*this, TypeAlignment) LValueReferenceType(T, Canonical, 1184 SpelledAsLValue); 1185 Types.push_back(New); 1186 LValueReferenceTypes.InsertNode(New, InsertPos); 1187 1188 return QualType(New, 0); 1189} 1190 1191/// getRValueReferenceType - Return the uniqued reference to the type for an 1192/// rvalue reference to the specified type. 1193QualType ASTContext::getRValueReferenceType(QualType T) { 1194 // Unique pointers, to guarantee there is only one pointer of a particular 1195 // structure. 1196 llvm::FoldingSetNodeID ID; 1197 ReferenceType::Profile(ID, T, false); 1198 1199 void *InsertPos = 0; 1200 if (RValueReferenceType *RT = 1201 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1202 return QualType(RT, 0); 1203 1204 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1205 1206 // If the referencee type isn't canonical, this won't be a canonical type 1207 // either, so fill in the canonical type field. 1208 QualType Canonical; 1209 if (InnerRef || !T.isCanonical()) { 1210 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1211 Canonical = getRValueReferenceType(getCanonicalType(PointeeType)); 1212 1213 // Get the new insert position for the node we care about. 1214 RValueReferenceType *NewIP = 1215 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1216 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1217 } 1218 1219 RValueReferenceType *New 1220 = new (*this, TypeAlignment) RValueReferenceType(T, Canonical); 1221 Types.push_back(New); 1222 RValueReferenceTypes.InsertNode(New, InsertPos); 1223 return QualType(New, 0); 1224} 1225 1226/// getMemberPointerType - Return the uniqued reference to the type for a 1227/// member pointer to the specified type, in the specified class. 1228QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls) { 1229 // Unique pointers, to guarantee there is only one pointer of a particular 1230 // structure. 1231 llvm::FoldingSetNodeID ID; 1232 MemberPointerType::Profile(ID, T, Cls); 1233 1234 void *InsertPos = 0; 1235 if (MemberPointerType *PT = 1236 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1237 return QualType(PT, 0); 1238 1239 // If the pointee or class type isn't canonical, this won't be a canonical 1240 // type either, so fill in the canonical type field. 1241 QualType Canonical; 1242 if (!T.isCanonical() || !Cls->isCanonicalUnqualified()) { 1243 Canonical = getMemberPointerType(getCanonicalType(T),getCanonicalType(Cls)); 1244 1245 // Get the new insert position for the node we care about. 1246 MemberPointerType *NewIP = 1247 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1248 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1249 } 1250 MemberPointerType *New 1251 = new (*this, TypeAlignment) MemberPointerType(T, Cls, Canonical); 1252 Types.push_back(New); 1253 MemberPointerTypes.InsertNode(New, InsertPos); 1254 return QualType(New, 0); 1255} 1256 1257/// getConstantArrayType - Return the unique reference to the type for an 1258/// array of the specified element type. 1259QualType ASTContext::getConstantArrayType(QualType EltTy, 1260 const llvm::APInt &ArySizeIn, 1261 ArrayType::ArraySizeModifier ASM, 1262 unsigned EltTypeQuals) { 1263 assert((EltTy->isDependentType() || 1264 EltTy->isIncompleteType() || EltTy->isConstantSizeType()) && 1265 "Constant array of VLAs is illegal!"); 1266 1267 // Convert the array size into a canonical width matching the pointer size for 1268 // the target. 1269 llvm::APInt ArySize(ArySizeIn); 1270 ArySize.zextOrTrunc(Target.getPointerWidth(EltTy.getAddressSpace())); 1271 1272 llvm::FoldingSetNodeID ID; 1273 ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, EltTypeQuals); 1274 1275 void *InsertPos = 0; 1276 if (ConstantArrayType *ATP = 1277 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1278 return QualType(ATP, 0); 1279 1280 // If the element type isn't canonical, this won't be a canonical type either, 1281 // so fill in the canonical type field. 1282 QualType Canonical; 1283 if (!EltTy.isCanonical()) { 1284 Canonical = getConstantArrayType(getCanonicalType(EltTy), ArySize, 1285 ASM, EltTypeQuals); 1286 // Get the new insert position for the node we care about. 1287 ConstantArrayType *NewIP = 1288 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1289 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1290 } 1291 1292 ConstantArrayType *New = new(*this,TypeAlignment) 1293 ConstantArrayType(EltTy, Canonical, ArySize, ASM, EltTypeQuals); 1294 ConstantArrayTypes.InsertNode(New, InsertPos); 1295 Types.push_back(New); 1296 return QualType(New, 0); 1297} 1298 1299/// getVariableArrayType - Returns a non-unique reference to the type for a 1300/// variable array of the specified element type. 1301QualType ASTContext::getVariableArrayType(QualType EltTy, 1302 Expr *NumElts, 1303 ArrayType::ArraySizeModifier ASM, 1304 unsigned EltTypeQuals, 1305 SourceRange Brackets) { 1306 // Since we don't unique expressions, it isn't possible to unique VLA's 1307 // that have an expression provided for their size. 1308 QualType CanonType; 1309 1310 if (!EltTy.isCanonical()) { 1311 if (NumElts) 1312 NumElts->Retain(); 1313 CanonType = getVariableArrayType(getCanonicalType(EltTy), NumElts, ASM, 1314 EltTypeQuals, Brackets); 1315 } 1316 1317 VariableArrayType *New = new(*this, TypeAlignment) 1318 VariableArrayType(EltTy, CanonType, NumElts, ASM, EltTypeQuals, Brackets); 1319 1320 VariableArrayTypes.push_back(New); 1321 Types.push_back(New); 1322 return QualType(New, 0); 1323} 1324 1325/// getDependentSizedArrayType - Returns a non-unique reference to 1326/// the type for a dependently-sized array of the specified element 1327/// type. 1328QualType ASTContext::getDependentSizedArrayType(QualType EltTy, 1329 Expr *NumElts, 1330 ArrayType::ArraySizeModifier ASM, 1331 unsigned EltTypeQuals, 1332 SourceRange Brackets) { 1333 assert((!NumElts || NumElts->isTypeDependent() || 1334 NumElts->isValueDependent()) && 1335 "Size must be type- or value-dependent!"); 1336 1337 void *InsertPos = 0; 1338 DependentSizedArrayType *Canon = 0; 1339 llvm::FoldingSetNodeID ID; 1340 1341 if (NumElts) { 1342 // Dependently-sized array types that do not have a specified 1343 // number of elements will have their sizes deduced from an 1344 // initializer. 1345 DependentSizedArrayType::Profile(ID, *this, getCanonicalType(EltTy), ASM, 1346 EltTypeQuals, NumElts); 1347 1348 Canon = DependentSizedArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1349 } 1350 1351 DependentSizedArrayType *New; 1352 if (Canon) { 1353 // We already have a canonical version of this array type; use it as 1354 // the canonical type for a newly-built type. 1355 New = new (*this, TypeAlignment) 1356 DependentSizedArrayType(*this, EltTy, QualType(Canon, 0), 1357 NumElts, ASM, EltTypeQuals, Brackets); 1358 } else { 1359 QualType CanonEltTy = getCanonicalType(EltTy); 1360 if (CanonEltTy == EltTy) { 1361 New = new (*this, TypeAlignment) 1362 DependentSizedArrayType(*this, EltTy, QualType(), 1363 NumElts, ASM, EltTypeQuals, Brackets); 1364 1365 if (NumElts) { 1366 DependentSizedArrayType *CanonCheck 1367 = DependentSizedArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1368 assert(!CanonCheck && "Dependent-sized canonical array type broken"); 1369 (void)CanonCheck; 1370 DependentSizedArrayTypes.InsertNode(New, InsertPos); 1371 } 1372 } else { 1373 QualType Canon = getDependentSizedArrayType(CanonEltTy, NumElts, 1374 ASM, EltTypeQuals, 1375 SourceRange()); 1376 New = new (*this, TypeAlignment) 1377 DependentSizedArrayType(*this, EltTy, Canon, 1378 NumElts, ASM, EltTypeQuals, Brackets); 1379 } 1380 } 1381 1382 Types.push_back(New); 1383 return QualType(New, 0); 1384} 1385 1386QualType ASTContext::getIncompleteArrayType(QualType EltTy, 1387 ArrayType::ArraySizeModifier ASM, 1388 unsigned EltTypeQuals) { 1389 llvm::FoldingSetNodeID ID; 1390 IncompleteArrayType::Profile(ID, EltTy, ASM, EltTypeQuals); 1391 1392 void *InsertPos = 0; 1393 if (IncompleteArrayType *ATP = 1394 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1395 return QualType(ATP, 0); 1396 1397 // If the element type isn't canonical, this won't be a canonical type 1398 // either, so fill in the canonical type field. 1399 QualType Canonical; 1400 1401 if (!EltTy.isCanonical()) { 1402 Canonical = getIncompleteArrayType(getCanonicalType(EltTy), 1403 ASM, EltTypeQuals); 1404 1405 // Get the new insert position for the node we care about. 1406 IncompleteArrayType *NewIP = 1407 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1408 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1409 } 1410 1411 IncompleteArrayType *New = new (*this, TypeAlignment) 1412 IncompleteArrayType(EltTy, Canonical, ASM, EltTypeQuals); 1413 1414 IncompleteArrayTypes.InsertNode(New, InsertPos); 1415 Types.push_back(New); 1416 return QualType(New, 0); 1417} 1418 1419/// getVectorType - Return the unique reference to a vector type of 1420/// the specified element type and size. VectorType must be a built-in type. 1421QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts, 1422 bool IsAltiVec, bool IsPixel) { 1423 BuiltinType *baseType; 1424 1425 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1426 assert(baseType != 0 && "getVectorType(): Expecting a built-in type"); 1427 1428 // Check if we've already instantiated a vector of this type. 1429 llvm::FoldingSetNodeID ID; 1430 VectorType::Profile(ID, vecType, NumElts, Type::Vector, 1431 IsAltiVec, IsPixel); 1432 void *InsertPos = 0; 1433 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1434 return QualType(VTP, 0); 1435 1436 // If the element type isn't canonical, this won't be a canonical type either, 1437 // so fill in the canonical type field. 1438 QualType Canonical; 1439 if (!vecType.isCanonical() || IsAltiVec || IsPixel) { 1440 Canonical = getVectorType(getCanonicalType(vecType), 1441 NumElts, false, false); 1442 1443 // Get the new insert position for the node we care about. 1444 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1445 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1446 } 1447 VectorType *New = new (*this, TypeAlignment) 1448 VectorType(vecType, NumElts, Canonical, IsAltiVec, IsPixel); 1449 VectorTypes.InsertNode(New, InsertPos); 1450 Types.push_back(New); 1451 return QualType(New, 0); 1452} 1453 1454/// getExtVectorType - Return the unique reference to an extended vector type of 1455/// the specified element type and size. VectorType must be a built-in type. 1456QualType ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) { 1457 BuiltinType *baseType; 1458 1459 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1460 assert(baseType != 0 && "getExtVectorType(): Expecting a built-in type"); 1461 1462 // Check if we've already instantiated a vector of this type. 1463 llvm::FoldingSetNodeID ID; 1464 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector, false, false); 1465 void *InsertPos = 0; 1466 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1467 return QualType(VTP, 0); 1468 1469 // If the element type isn't canonical, this won't be a canonical type either, 1470 // so fill in the canonical type field. 1471 QualType Canonical; 1472 if (!vecType.isCanonical()) { 1473 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts); 1474 1475 // Get the new insert position for the node we care about. 1476 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1477 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1478 } 1479 ExtVectorType *New = new (*this, TypeAlignment) 1480 ExtVectorType(vecType, NumElts, Canonical); 1481 VectorTypes.InsertNode(New, InsertPos); 1482 Types.push_back(New); 1483 return QualType(New, 0); 1484} 1485 1486QualType ASTContext::getDependentSizedExtVectorType(QualType vecType, 1487 Expr *SizeExpr, 1488 SourceLocation AttrLoc) { 1489 llvm::FoldingSetNodeID ID; 1490 DependentSizedExtVectorType::Profile(ID, *this, getCanonicalType(vecType), 1491 SizeExpr); 1492 1493 void *InsertPos = 0; 1494 DependentSizedExtVectorType *Canon 1495 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1496 DependentSizedExtVectorType *New; 1497 if (Canon) { 1498 // We already have a canonical version of this array type; use it as 1499 // the canonical type for a newly-built type. 1500 New = new (*this, TypeAlignment) 1501 DependentSizedExtVectorType(*this, vecType, QualType(Canon, 0), 1502 SizeExpr, AttrLoc); 1503 } else { 1504 QualType CanonVecTy = getCanonicalType(vecType); 1505 if (CanonVecTy == vecType) { 1506 New = new (*this, TypeAlignment) 1507 DependentSizedExtVectorType(*this, vecType, QualType(), SizeExpr, 1508 AttrLoc); 1509 1510 DependentSizedExtVectorType *CanonCheck 1511 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1512 assert(!CanonCheck && "Dependent-sized ext_vector canonical type broken"); 1513 (void)CanonCheck; 1514 DependentSizedExtVectorTypes.InsertNode(New, InsertPos); 1515 } else { 1516 QualType Canon = getDependentSizedExtVectorType(CanonVecTy, SizeExpr, 1517 SourceLocation()); 1518 New = new (*this, TypeAlignment) 1519 DependentSizedExtVectorType(*this, vecType, Canon, SizeExpr, AttrLoc); 1520 } 1521 } 1522 1523 Types.push_back(New); 1524 return QualType(New, 0); 1525} 1526 1527/// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 1528/// 1529QualType ASTContext::getFunctionNoProtoType(QualType ResultTy, 1530 const FunctionType::ExtInfo &Info) { 1531 const CallingConv CallConv = Info.getCC(); 1532 // Unique functions, to guarantee there is only one function of a particular 1533 // structure. 1534 llvm::FoldingSetNodeID ID; 1535 FunctionNoProtoType::Profile(ID, ResultTy, Info); 1536 1537 void *InsertPos = 0; 1538 if (FunctionNoProtoType *FT = 1539 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1540 return QualType(FT, 0); 1541 1542 QualType Canonical; 1543 if (!ResultTy.isCanonical() || 1544 getCanonicalCallConv(CallConv) != CallConv) { 1545 Canonical = 1546 getFunctionNoProtoType(getCanonicalType(ResultTy), 1547 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1548 1549 // Get the new insert position for the node we care about. 1550 FunctionNoProtoType *NewIP = 1551 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1552 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1553 } 1554 1555 FunctionNoProtoType *New = new (*this, TypeAlignment) 1556 FunctionNoProtoType(ResultTy, Canonical, Info); 1557 Types.push_back(New); 1558 FunctionNoProtoTypes.InsertNode(New, InsertPos); 1559 return QualType(New, 0); 1560} 1561 1562/// getFunctionType - Return a normal function type with a typed argument 1563/// list. isVariadic indicates whether the argument list includes '...'. 1564QualType ASTContext::getFunctionType(QualType ResultTy,const QualType *ArgArray, 1565 unsigned NumArgs, bool isVariadic, 1566 unsigned TypeQuals, bool hasExceptionSpec, 1567 bool hasAnyExceptionSpec, unsigned NumExs, 1568 const QualType *ExArray, 1569 const FunctionType::ExtInfo &Info) { 1570 const CallingConv CallConv= Info.getCC(); 1571 // Unique functions, to guarantee there is only one function of a particular 1572 // structure. 1573 llvm::FoldingSetNodeID ID; 1574 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, isVariadic, 1575 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1576 NumExs, ExArray, Info); 1577 1578 void *InsertPos = 0; 1579 if (FunctionProtoType *FTP = 1580 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1581 return QualType(FTP, 0); 1582 1583 // Determine whether the type being created is already canonical or not. 1584 bool isCanonical = !hasExceptionSpec && ResultTy.isCanonical(); 1585 for (unsigned i = 0; i != NumArgs && isCanonical; ++i) 1586 if (!ArgArray[i].isCanonicalAsParam()) 1587 isCanonical = false; 1588 1589 // If this type isn't canonical, get the canonical version of it. 1590 // The exception spec is not part of the canonical type. 1591 QualType Canonical; 1592 if (!isCanonical || getCanonicalCallConv(CallConv) != CallConv) { 1593 llvm::SmallVector<QualType, 16> CanonicalArgs; 1594 CanonicalArgs.reserve(NumArgs); 1595 for (unsigned i = 0; i != NumArgs; ++i) 1596 CanonicalArgs.push_back(getCanonicalParamType(ArgArray[i])); 1597 1598 Canonical = getFunctionType(getCanonicalType(ResultTy), 1599 CanonicalArgs.data(), NumArgs, 1600 isVariadic, TypeQuals, false, 1601 false, 0, 0, 1602 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1603 1604 // Get the new insert position for the node we care about. 1605 FunctionProtoType *NewIP = 1606 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1607 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1608 } 1609 1610 // FunctionProtoType objects are allocated with extra bytes after them 1611 // for two variable size arrays (for parameter and exception types) at the 1612 // end of them. 1613 FunctionProtoType *FTP = 1614 (FunctionProtoType*)Allocate(sizeof(FunctionProtoType) + 1615 NumArgs*sizeof(QualType) + 1616 NumExs*sizeof(QualType), TypeAlignment); 1617 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, isVariadic, 1618 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1619 ExArray, NumExs, Canonical, Info); 1620 Types.push_back(FTP); 1621 FunctionProtoTypes.InsertNode(FTP, InsertPos); 1622 return QualType(FTP, 0); 1623} 1624 1625#ifndef NDEBUG 1626static bool NeedsInjectedClassNameType(const RecordDecl *D) { 1627 if (!isa<CXXRecordDecl>(D)) return false; 1628 const CXXRecordDecl *RD = cast<CXXRecordDecl>(D); 1629 if (isa<ClassTemplatePartialSpecializationDecl>(RD)) 1630 return true; 1631 if (RD->getDescribedClassTemplate() && 1632 !isa<ClassTemplateSpecializationDecl>(RD)) 1633 return true; 1634 return false; 1635} 1636#endif 1637 1638/// getInjectedClassNameType - Return the unique reference to the 1639/// injected class name type for the specified templated declaration. 1640QualType ASTContext::getInjectedClassNameType(CXXRecordDecl *Decl, 1641 QualType TST) { 1642 assert(NeedsInjectedClassNameType(Decl)); 1643 if (Decl->TypeForDecl) { 1644 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1645 } else if (CXXRecordDecl *PrevDecl 1646 = cast_or_null<CXXRecordDecl>(Decl->getPreviousDeclaration())) { 1647 assert(PrevDecl->TypeForDecl && "previous declaration has no type"); 1648 Decl->TypeForDecl = PrevDecl->TypeForDecl; 1649 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1650 } else { 1651 Decl->TypeForDecl = 1652 new (*this, TypeAlignment) InjectedClassNameType(Decl, TST); 1653 Types.push_back(Decl->TypeForDecl); 1654 } 1655 return QualType(Decl->TypeForDecl, 0); 1656} 1657 1658/// getTypeDeclType - Return the unique reference to the type for the 1659/// specified type declaration. 1660QualType ASTContext::getTypeDeclTypeSlow(const TypeDecl *Decl) { 1661 assert(Decl && "Passed null for Decl param"); 1662 assert(!Decl->TypeForDecl && "TypeForDecl present in slow case"); 1663 1664 if (const TypedefDecl *Typedef = dyn_cast<TypedefDecl>(Decl)) 1665 return getTypedefType(Typedef); 1666 1667 assert(!isa<TemplateTypeParmDecl>(Decl) && 1668 "Template type parameter types are always available."); 1669 1670 if (const RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) { 1671 assert(!Record->getPreviousDeclaration() && 1672 "struct/union has previous declaration"); 1673 assert(!NeedsInjectedClassNameType(Record)); 1674 Decl->TypeForDecl = new (*this, TypeAlignment) RecordType(Record); 1675 } else if (const EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) { 1676 assert(!Enum->getPreviousDeclaration() && 1677 "enum has previous declaration"); 1678 Decl->TypeForDecl = new (*this, TypeAlignment) EnumType(Enum); 1679 } else if (const UnresolvedUsingTypenameDecl *Using = 1680 dyn_cast<UnresolvedUsingTypenameDecl>(Decl)) { 1681 Decl->TypeForDecl = new (*this, TypeAlignment) UnresolvedUsingType(Using); 1682 } else 1683 llvm_unreachable("TypeDecl without a type?"); 1684 1685 Types.push_back(Decl->TypeForDecl); 1686 return QualType(Decl->TypeForDecl, 0); 1687} 1688 1689/// getTypedefType - Return the unique reference to the type for the 1690/// specified typename decl. 1691QualType ASTContext::getTypedefType(const TypedefDecl *Decl) { 1692 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1693 1694 QualType Canonical = getCanonicalType(Decl->getUnderlyingType()); 1695 Decl->TypeForDecl = new(*this, TypeAlignment) 1696 TypedefType(Type::Typedef, Decl, Canonical); 1697 Types.push_back(Decl->TypeForDecl); 1698 return QualType(Decl->TypeForDecl, 0); 1699} 1700 1701/// \brief Retrieve a substitution-result type. 1702QualType 1703ASTContext::getSubstTemplateTypeParmType(const TemplateTypeParmType *Parm, 1704 QualType Replacement) { 1705 assert(Replacement.isCanonical() 1706 && "replacement types must always be canonical"); 1707 1708 llvm::FoldingSetNodeID ID; 1709 SubstTemplateTypeParmType::Profile(ID, Parm, Replacement); 1710 void *InsertPos = 0; 1711 SubstTemplateTypeParmType *SubstParm 1712 = SubstTemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1713 1714 if (!SubstParm) { 1715 SubstParm = new (*this, TypeAlignment) 1716 SubstTemplateTypeParmType(Parm, Replacement); 1717 Types.push_back(SubstParm); 1718 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 1719 } 1720 1721 return QualType(SubstParm, 0); 1722} 1723 1724/// \brief Retrieve the template type parameter type for a template 1725/// parameter or parameter pack with the given depth, index, and (optionally) 1726/// name. 1727QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index, 1728 bool ParameterPack, 1729 IdentifierInfo *Name) { 1730 llvm::FoldingSetNodeID ID; 1731 TemplateTypeParmType::Profile(ID, Depth, Index, ParameterPack, Name); 1732 void *InsertPos = 0; 1733 TemplateTypeParmType *TypeParm 1734 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1735 1736 if (TypeParm) 1737 return QualType(TypeParm, 0); 1738 1739 if (Name) { 1740 QualType Canon = getTemplateTypeParmType(Depth, Index, ParameterPack); 1741 TypeParm = new (*this, TypeAlignment) 1742 TemplateTypeParmType(Depth, Index, ParameterPack, Name, Canon); 1743 1744 TemplateTypeParmType *TypeCheck 1745 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1746 assert(!TypeCheck && "Template type parameter canonical type broken"); 1747 (void)TypeCheck; 1748 } else 1749 TypeParm = new (*this, TypeAlignment) 1750 TemplateTypeParmType(Depth, Index, ParameterPack); 1751 1752 Types.push_back(TypeParm); 1753 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos); 1754 1755 return QualType(TypeParm, 0); 1756} 1757 1758TypeSourceInfo * 1759ASTContext::getTemplateSpecializationTypeInfo(TemplateName Name, 1760 SourceLocation NameLoc, 1761 const TemplateArgumentListInfo &Args, 1762 QualType CanonType) { 1763 QualType TST = getTemplateSpecializationType(Name, Args, CanonType); 1764 1765 TypeSourceInfo *DI = CreateTypeSourceInfo(TST); 1766 TemplateSpecializationTypeLoc TL 1767 = cast<TemplateSpecializationTypeLoc>(DI->getTypeLoc()); 1768 TL.setTemplateNameLoc(NameLoc); 1769 TL.setLAngleLoc(Args.getLAngleLoc()); 1770 TL.setRAngleLoc(Args.getRAngleLoc()); 1771 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 1772 TL.setArgLocInfo(i, Args[i].getLocInfo()); 1773 return DI; 1774} 1775 1776QualType 1777ASTContext::getTemplateSpecializationType(TemplateName Template, 1778 const TemplateArgumentListInfo &Args, 1779 QualType Canon, 1780 bool IsCurrentInstantiation) { 1781 unsigned NumArgs = Args.size(); 1782 1783 llvm::SmallVector<TemplateArgument, 4> ArgVec; 1784 ArgVec.reserve(NumArgs); 1785 for (unsigned i = 0; i != NumArgs; ++i) 1786 ArgVec.push_back(Args[i].getArgument()); 1787 1788 return getTemplateSpecializationType(Template, ArgVec.data(), NumArgs, 1789 Canon, IsCurrentInstantiation); 1790} 1791 1792QualType 1793ASTContext::getTemplateSpecializationType(TemplateName Template, 1794 const TemplateArgument *Args, 1795 unsigned NumArgs, 1796 QualType Canon, 1797 bool IsCurrentInstantiation) { 1798 if (!Canon.isNull()) 1799 Canon = getCanonicalType(Canon); 1800 else { 1801 assert(!IsCurrentInstantiation && 1802 "current-instantiation specializations should always " 1803 "have a canonical type"); 1804 1805 // Build the canonical template specialization type. 1806 TemplateName CanonTemplate = getCanonicalTemplateName(Template); 1807 llvm::SmallVector<TemplateArgument, 4> CanonArgs; 1808 CanonArgs.reserve(NumArgs); 1809 for (unsigned I = 0; I != NumArgs; ++I) 1810 CanonArgs.push_back(getCanonicalTemplateArgument(Args[I])); 1811 1812 // Determine whether this canonical template specialization type already 1813 // exists. 1814 llvm::FoldingSetNodeID ID; 1815 TemplateSpecializationType::Profile(ID, CanonTemplate, false, 1816 CanonArgs.data(), NumArgs, *this); 1817 1818 void *InsertPos = 0; 1819 TemplateSpecializationType *Spec 1820 = TemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 1821 1822 if (!Spec) { 1823 // Allocate a new canonical template specialization type. 1824 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 1825 sizeof(TemplateArgument) * NumArgs), 1826 TypeAlignment); 1827 Spec = new (Mem) TemplateSpecializationType(*this, CanonTemplate, false, 1828 CanonArgs.data(), NumArgs, 1829 Canon); 1830 Types.push_back(Spec); 1831 TemplateSpecializationTypes.InsertNode(Spec, InsertPos); 1832 } 1833 1834 if (Canon.isNull()) 1835 Canon = QualType(Spec, 0); 1836 assert(Canon->isDependentType() && 1837 "Non-dependent template-id type must have a canonical type"); 1838 } 1839 1840 // Allocate the (non-canonical) template specialization type, but don't 1841 // try to unique it: these types typically have location information that 1842 // we don't unique and don't want to lose. 1843 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 1844 sizeof(TemplateArgument) * NumArgs), 1845 TypeAlignment); 1846 TemplateSpecializationType *Spec 1847 = new (Mem) TemplateSpecializationType(*this, Template, 1848 IsCurrentInstantiation, 1849 Args, NumArgs, 1850 Canon); 1851 1852 Types.push_back(Spec); 1853 return QualType(Spec, 0); 1854} 1855 1856QualType 1857ASTContext::getElaboratedType(ElaboratedTypeKeyword Keyword, 1858 NestedNameSpecifier *NNS, 1859 QualType NamedType) { 1860 llvm::FoldingSetNodeID ID; 1861 ElaboratedType::Profile(ID, Keyword, NNS, NamedType); 1862 1863 void *InsertPos = 0; 1864 ElaboratedType *T = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 1865 if (T) 1866 return QualType(T, 0); 1867 1868 QualType Canon = NamedType; 1869 if (!Canon.isCanonical()) { 1870 Canon = getCanonicalType(NamedType); 1871 ElaboratedType *CheckT = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 1872 assert(!CheckT && "Elaborated canonical type broken"); 1873 (void)CheckT; 1874 } 1875 1876 T = new (*this) ElaboratedType(Keyword, NNS, NamedType, Canon); 1877 Types.push_back(T); 1878 ElaboratedTypes.InsertNode(T, InsertPos); 1879 return QualType(T, 0); 1880} 1881 1882QualType ASTContext::getDependentNameType(ElaboratedTypeKeyword Keyword, 1883 NestedNameSpecifier *NNS, 1884 const IdentifierInfo *Name, 1885 QualType Canon) { 1886 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 1887 1888 if (Canon.isNull()) { 1889 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 1890 ElaboratedTypeKeyword CanonKeyword = Keyword; 1891 if (Keyword == ETK_None) 1892 CanonKeyword = ETK_Typename; 1893 1894 if (CanonNNS != NNS || CanonKeyword != Keyword) 1895 Canon = getDependentNameType(CanonKeyword, CanonNNS, Name); 1896 } 1897 1898 llvm::FoldingSetNodeID ID; 1899 DependentNameType::Profile(ID, Keyword, NNS, Name); 1900 1901 void *InsertPos = 0; 1902 DependentNameType *T 1903 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 1904 if (T) 1905 return QualType(T, 0); 1906 1907 T = new (*this) DependentNameType(Keyword, NNS, Name, Canon); 1908 Types.push_back(T); 1909 DependentNameTypes.InsertNode(T, InsertPos); 1910 return QualType(T, 0); 1911} 1912 1913QualType 1914ASTContext::getDependentNameType(ElaboratedTypeKeyword Keyword, 1915 NestedNameSpecifier *NNS, 1916 const TemplateSpecializationType *TemplateId, 1917 QualType Canon) { 1918 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 1919 1920 llvm::FoldingSetNodeID ID; 1921 DependentNameType::Profile(ID, Keyword, NNS, TemplateId); 1922 1923 void *InsertPos = 0; 1924 DependentNameType *T 1925 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 1926 if (T) 1927 return QualType(T, 0); 1928 1929 if (Canon.isNull()) { 1930 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 1931 QualType CanonType = getCanonicalType(QualType(TemplateId, 0)); 1932 ElaboratedTypeKeyword CanonKeyword = Keyword; 1933 if (Keyword == ETK_None) 1934 CanonKeyword = ETK_Typename; 1935 if (CanonNNS != NNS || CanonKeyword != Keyword || 1936 CanonType != QualType(TemplateId, 0)) { 1937 const TemplateSpecializationType *CanonTemplateId 1938 = CanonType->getAs<TemplateSpecializationType>(); 1939 assert(CanonTemplateId && 1940 "Canonical type must also be a template specialization type"); 1941 Canon = getDependentNameType(CanonKeyword, CanonNNS, CanonTemplateId); 1942 } 1943 1944 DependentNameType *CheckT 1945 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 1946 assert(!CheckT && "Typename canonical type is broken"); (void)CheckT; 1947 } 1948 1949 T = new (*this) DependentNameType(Keyword, NNS, TemplateId, Canon); 1950 Types.push_back(T); 1951 DependentNameTypes.InsertNode(T, InsertPos); 1952 return QualType(T, 0); 1953} 1954 1955/// CmpProtocolNames - Comparison predicate for sorting protocols 1956/// alphabetically. 1957static bool CmpProtocolNames(const ObjCProtocolDecl *LHS, 1958 const ObjCProtocolDecl *RHS) { 1959 return LHS->getDeclName() < RHS->getDeclName(); 1960} 1961 1962static bool areSortedAndUniqued(ObjCProtocolDecl * const *Protocols, 1963 unsigned NumProtocols) { 1964 if (NumProtocols == 0) return true; 1965 1966 for (unsigned i = 1; i != NumProtocols; ++i) 1967 if (!CmpProtocolNames(Protocols[i-1], Protocols[i])) 1968 return false; 1969 return true; 1970} 1971 1972static void SortAndUniqueProtocols(ObjCProtocolDecl **Protocols, 1973 unsigned &NumProtocols) { 1974 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols; 1975 1976 // Sort protocols, keyed by name. 1977 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames); 1978 1979 // Remove duplicates. 1980 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd); 1981 NumProtocols = ProtocolsEnd-Protocols; 1982} 1983 1984QualType ASTContext::getObjCObjectType(QualType BaseType, 1985 ObjCProtocolDecl * const *Protocols, 1986 unsigned NumProtocols) { 1987 // If the base type is an interface and there aren't any protocols 1988 // to add, then the interface type will do just fine. 1989 if (!NumProtocols && isa<ObjCInterfaceType>(BaseType)) 1990 return BaseType; 1991 1992 // Look in the folding set for an existing type. 1993 llvm::FoldingSetNodeID ID; 1994 ObjCObjectTypeImpl::Profile(ID, BaseType, Protocols, NumProtocols); 1995 void *InsertPos = 0; 1996 if (ObjCObjectType *QT = ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos)) 1997 return QualType(QT, 0); 1998 1999 // Build the canonical type, which has the canonical base type and 2000 // a sorted-and-uniqued list of protocols. 2001 QualType Canonical; 2002 bool ProtocolsSorted = areSortedAndUniqued(Protocols, NumProtocols); 2003 if (!ProtocolsSorted || !BaseType.isCanonical()) { 2004 if (!ProtocolsSorted) { 2005 llvm::SmallVector<ObjCProtocolDecl*, 8> Sorted(Protocols, 2006 Protocols + NumProtocols); 2007 unsigned UniqueCount = NumProtocols; 2008 2009 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2010 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2011 &Sorted[0], UniqueCount); 2012 } else { 2013 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2014 Protocols, NumProtocols); 2015 } 2016 2017 // Regenerate InsertPos. 2018 ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos); 2019 } 2020 2021 unsigned Size = sizeof(ObjCObjectTypeImpl); 2022 Size += NumProtocols * sizeof(ObjCProtocolDecl *); 2023 void *Mem = Allocate(Size, TypeAlignment); 2024 ObjCObjectTypeImpl *T = 2025 new (Mem) ObjCObjectTypeImpl(Canonical, BaseType, Protocols, NumProtocols); 2026 2027 Types.push_back(T); 2028 ObjCObjectTypes.InsertNode(T, InsertPos); 2029 return QualType(T, 0); 2030} 2031 2032/// getObjCObjectPointerType - Return a ObjCObjectPointerType type for 2033/// the given object type. 2034QualType ASTContext::getObjCObjectPointerType(QualType ObjectT) { 2035 llvm::FoldingSetNodeID ID; 2036 ObjCObjectPointerType::Profile(ID, ObjectT); 2037 2038 void *InsertPos = 0; 2039 if (ObjCObjectPointerType *QT = 2040 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 2041 return QualType(QT, 0); 2042 2043 // Find the canonical object type. 2044 QualType Canonical; 2045 if (!ObjectT.isCanonical()) { 2046 Canonical = getObjCObjectPointerType(getCanonicalType(ObjectT)); 2047 2048 // Regenerate InsertPos. 2049 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 2050 } 2051 2052 // No match. 2053 void *Mem = Allocate(sizeof(ObjCObjectPointerType), TypeAlignment); 2054 ObjCObjectPointerType *QType = 2055 new (Mem) ObjCObjectPointerType(Canonical, ObjectT); 2056 2057 Types.push_back(QType); 2058 ObjCObjectPointerTypes.InsertNode(QType, InsertPos); 2059 return QualType(QType, 0); 2060} 2061 2062/// getObjCInterfaceType - Return the unique reference to the type for the 2063/// specified ObjC interface decl. The list of protocols is optional. 2064QualType ASTContext::getObjCInterfaceType(const ObjCInterfaceDecl *Decl) { 2065 if (Decl->TypeForDecl) 2066 return QualType(Decl->TypeForDecl, 0); 2067 2068 // FIXME: redeclarations? 2069 void *Mem = Allocate(sizeof(ObjCInterfaceType), TypeAlignment); 2070 ObjCInterfaceType *T = new (Mem) ObjCInterfaceType(Decl); 2071 Decl->TypeForDecl = T; 2072 Types.push_back(T); 2073 return QualType(T, 0); 2074} 2075 2076/// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique 2077/// TypeOfExprType AST's (since expression's are never shared). For example, 2078/// multiple declarations that refer to "typeof(x)" all contain different 2079/// DeclRefExpr's. This doesn't effect the type checker, since it operates 2080/// on canonical type's (which are always unique). 2081QualType ASTContext::getTypeOfExprType(Expr *tofExpr) { 2082 TypeOfExprType *toe; 2083 if (tofExpr->isTypeDependent()) { 2084 llvm::FoldingSetNodeID ID; 2085 DependentTypeOfExprType::Profile(ID, *this, tofExpr); 2086 2087 void *InsertPos = 0; 2088 DependentTypeOfExprType *Canon 2089 = DependentTypeOfExprTypes.FindNodeOrInsertPos(ID, InsertPos); 2090 if (Canon) { 2091 // We already have a "canonical" version of an identical, dependent 2092 // typeof(expr) type. Use that as our canonical type. 2093 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, 2094 QualType((TypeOfExprType*)Canon, 0)); 2095 } 2096 else { 2097 // Build a new, canonical typeof(expr) type. 2098 Canon 2099 = new (*this, TypeAlignment) DependentTypeOfExprType(*this, tofExpr); 2100 DependentTypeOfExprTypes.InsertNode(Canon, InsertPos); 2101 toe = Canon; 2102 } 2103 } else { 2104 QualType Canonical = getCanonicalType(tofExpr->getType()); 2105 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, Canonical); 2106 } 2107 Types.push_back(toe); 2108 return QualType(toe, 0); 2109} 2110 2111/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique 2112/// TypeOfType AST's. The only motivation to unique these nodes would be 2113/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be 2114/// an issue. This doesn't effect the type checker, since it operates 2115/// on canonical type's (which are always unique). 2116QualType ASTContext::getTypeOfType(QualType tofType) { 2117 QualType Canonical = getCanonicalType(tofType); 2118 TypeOfType *tot = new (*this, TypeAlignment) TypeOfType(tofType, Canonical); 2119 Types.push_back(tot); 2120 return QualType(tot, 0); 2121} 2122 2123/// getDecltypeForExpr - Given an expr, will return the decltype for that 2124/// expression, according to the rules in C++0x [dcl.type.simple]p4 2125static QualType getDecltypeForExpr(const Expr *e, ASTContext &Context) { 2126 if (e->isTypeDependent()) 2127 return Context.DependentTy; 2128 2129 // If e is an id expression or a class member access, decltype(e) is defined 2130 // as the type of the entity named by e. 2131 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(e)) { 2132 if (const ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl())) 2133 return VD->getType(); 2134 } 2135 if (const MemberExpr *ME = dyn_cast<MemberExpr>(e)) { 2136 if (const FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) 2137 return FD->getType(); 2138 } 2139 // If e is a function call or an invocation of an overloaded operator, 2140 // (parentheses around e are ignored), decltype(e) is defined as the 2141 // return type of that function. 2142 if (const CallExpr *CE = dyn_cast<CallExpr>(e->IgnoreParens())) 2143 return CE->getCallReturnType(); 2144 2145 QualType T = e->getType(); 2146 2147 // Otherwise, where T is the type of e, if e is an lvalue, decltype(e) is 2148 // defined as T&, otherwise decltype(e) is defined as T. 2149 if (e->isLvalue(Context) == Expr::LV_Valid) 2150 T = Context.getLValueReferenceType(T); 2151 2152 return T; 2153} 2154 2155/// getDecltypeType - Unlike many "get<Type>" functions, we don't unique 2156/// DecltypeType AST's. The only motivation to unique these nodes would be 2157/// memory savings. Since decltype(t) is fairly uncommon, space shouldn't be 2158/// an issue. This doesn't effect the type checker, since it operates 2159/// on canonical type's (which are always unique). 2160QualType ASTContext::getDecltypeType(Expr *e) { 2161 DecltypeType *dt; 2162 if (e->isTypeDependent()) { 2163 llvm::FoldingSetNodeID ID; 2164 DependentDecltypeType::Profile(ID, *this, e); 2165 2166 void *InsertPos = 0; 2167 DependentDecltypeType *Canon 2168 = DependentDecltypeTypes.FindNodeOrInsertPos(ID, InsertPos); 2169 if (Canon) { 2170 // We already have a "canonical" version of an equivalent, dependent 2171 // decltype type. Use that as our canonical type. 2172 dt = new (*this, TypeAlignment) DecltypeType(e, DependentTy, 2173 QualType((DecltypeType*)Canon, 0)); 2174 } 2175 else { 2176 // Build a new, canonical typeof(expr) type. 2177 Canon = new (*this, TypeAlignment) DependentDecltypeType(*this, e); 2178 DependentDecltypeTypes.InsertNode(Canon, InsertPos); 2179 dt = Canon; 2180 } 2181 } else { 2182 QualType T = getDecltypeForExpr(e, *this); 2183 dt = new (*this, TypeAlignment) DecltypeType(e, T, getCanonicalType(T)); 2184 } 2185 Types.push_back(dt); 2186 return QualType(dt, 0); 2187} 2188 2189/// getTagDeclType - Return the unique reference to the type for the 2190/// specified TagDecl (struct/union/class/enum) decl. 2191QualType ASTContext::getTagDeclType(const TagDecl *Decl) { 2192 assert (Decl); 2193 // FIXME: What is the design on getTagDeclType when it requires casting 2194 // away const? mutable? 2195 return getTypeDeclType(const_cast<TagDecl*>(Decl)); 2196} 2197 2198/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result 2199/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and 2200/// needs to agree with the definition in <stddef.h>. 2201CanQualType ASTContext::getSizeType() const { 2202 return getFromTargetType(Target.getSizeType()); 2203} 2204 2205/// getSignedWCharType - Return the type of "signed wchar_t". 2206/// Used when in C++, as a GCC extension. 2207QualType ASTContext::getSignedWCharType() const { 2208 // FIXME: derive from "Target" ? 2209 return WCharTy; 2210} 2211 2212/// getUnsignedWCharType - Return the type of "unsigned wchar_t". 2213/// Used when in C++, as a GCC extension. 2214QualType ASTContext::getUnsignedWCharType() const { 2215 // FIXME: derive from "Target" ? 2216 return UnsignedIntTy; 2217} 2218 2219/// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 2220/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 2221QualType ASTContext::getPointerDiffType() const { 2222 return getFromTargetType(Target.getPtrDiffType(0)); 2223} 2224 2225//===----------------------------------------------------------------------===// 2226// Type Operators 2227//===----------------------------------------------------------------------===// 2228 2229CanQualType ASTContext::getCanonicalParamType(QualType T) { 2230 // Push qualifiers into arrays, and then discard any remaining 2231 // qualifiers. 2232 T = getCanonicalType(T); 2233 const Type *Ty = T.getTypePtr(); 2234 2235 QualType Result; 2236 if (isa<ArrayType>(Ty)) { 2237 Result = getArrayDecayedType(QualType(Ty,0)); 2238 } else if (isa<FunctionType>(Ty)) { 2239 Result = getPointerType(QualType(Ty, 0)); 2240 } else { 2241 Result = QualType(Ty, 0); 2242 } 2243 2244 return CanQualType::CreateUnsafe(Result); 2245} 2246 2247/// getCanonicalType - Return the canonical (structural) type corresponding to 2248/// the specified potentially non-canonical type. The non-canonical version 2249/// of a type may have many "decorated" versions of types. Decorators can 2250/// include typedefs, 'typeof' operators, etc. The returned type is guaranteed 2251/// to be free of any of these, allowing two canonical types to be compared 2252/// for exact equality with a simple pointer comparison. 2253CanQualType ASTContext::getCanonicalType(QualType T) { 2254 QualifierCollector Quals; 2255 const Type *Ptr = Quals.strip(T); 2256 QualType CanType = Ptr->getCanonicalTypeInternal(); 2257 2258 // The canonical internal type will be the canonical type *except* 2259 // that we push type qualifiers down through array types. 2260 2261 // If there are no new qualifiers to push down, stop here. 2262 if (!Quals.hasQualifiers()) 2263 return CanQualType::CreateUnsafe(CanType); 2264 2265 // If the type qualifiers are on an array type, get the canonical 2266 // type of the array with the qualifiers applied to the element 2267 // type. 2268 ArrayType *AT = dyn_cast<ArrayType>(CanType); 2269 if (!AT) 2270 return CanQualType::CreateUnsafe(getQualifiedType(CanType, Quals)); 2271 2272 // Get the canonical version of the element with the extra qualifiers on it. 2273 // This can recursively sink qualifiers through multiple levels of arrays. 2274 QualType NewEltTy = getQualifiedType(AT->getElementType(), Quals); 2275 NewEltTy = getCanonicalType(NewEltTy); 2276 2277 if (ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 2278 return CanQualType::CreateUnsafe( 2279 getConstantArrayType(NewEltTy, CAT->getSize(), 2280 CAT->getSizeModifier(), 2281 CAT->getIndexTypeCVRQualifiers())); 2282 if (IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) 2283 return CanQualType::CreateUnsafe( 2284 getIncompleteArrayType(NewEltTy, IAT->getSizeModifier(), 2285 IAT->getIndexTypeCVRQualifiers())); 2286 2287 if (DependentSizedArrayType *DSAT = dyn_cast<DependentSizedArrayType>(AT)) 2288 return CanQualType::CreateUnsafe( 2289 getDependentSizedArrayType(NewEltTy, 2290 DSAT->getSizeExpr() ? 2291 DSAT->getSizeExpr()->Retain() : 0, 2292 DSAT->getSizeModifier(), 2293 DSAT->getIndexTypeCVRQualifiers(), 2294 DSAT->getBracketsRange())->getCanonicalTypeInternal()); 2295 2296 VariableArrayType *VAT = cast<VariableArrayType>(AT); 2297 return CanQualType::CreateUnsafe(getVariableArrayType(NewEltTy, 2298 VAT->getSizeExpr() ? 2299 VAT->getSizeExpr()->Retain() : 0, 2300 VAT->getSizeModifier(), 2301 VAT->getIndexTypeCVRQualifiers(), 2302 VAT->getBracketsRange())); 2303} 2304 2305QualType ASTContext::getUnqualifiedArrayType(QualType T, 2306 Qualifiers &Quals) { 2307 Quals = T.getQualifiers(); 2308 const ArrayType *AT = getAsArrayType(T); 2309 if (!AT) { 2310 return T.getUnqualifiedType(); 2311 } 2312 2313 QualType Elt = AT->getElementType(); 2314 QualType UnqualElt = getUnqualifiedArrayType(Elt, Quals); 2315 if (Elt == UnqualElt) 2316 return T; 2317 2318 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) { 2319 return getConstantArrayType(UnqualElt, CAT->getSize(), 2320 CAT->getSizeModifier(), 0); 2321 } 2322 2323 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) { 2324 return getIncompleteArrayType(UnqualElt, IAT->getSizeModifier(), 0); 2325 } 2326 2327 if (const VariableArrayType *VAT = dyn_cast<VariableArrayType>(AT)) { 2328 return getVariableArrayType(UnqualElt, 2329 VAT->getSizeExpr() ? 2330 VAT->getSizeExpr()->Retain() : 0, 2331 VAT->getSizeModifier(), 2332 VAT->getIndexTypeCVRQualifiers(), 2333 VAT->getBracketsRange()); 2334 } 2335 2336 const DependentSizedArrayType *DSAT = cast<DependentSizedArrayType>(AT); 2337 return getDependentSizedArrayType(UnqualElt, DSAT->getSizeExpr()->Retain(), 2338 DSAT->getSizeModifier(), 0, 2339 SourceRange()); 2340} 2341 2342DeclarationName ASTContext::getNameForTemplate(TemplateName Name) { 2343 if (TemplateDecl *TD = Name.getAsTemplateDecl()) 2344 return TD->getDeclName(); 2345 2346 if (DependentTemplateName *DTN = Name.getAsDependentTemplateName()) { 2347 if (DTN->isIdentifier()) { 2348 return DeclarationNames.getIdentifier(DTN->getIdentifier()); 2349 } else { 2350 return DeclarationNames.getCXXOperatorName(DTN->getOperator()); 2351 } 2352 } 2353 2354 OverloadedTemplateStorage *Storage = Name.getAsOverloadedTemplate(); 2355 assert(Storage); 2356 return (*Storage->begin())->getDeclName(); 2357} 2358 2359TemplateName ASTContext::getCanonicalTemplateName(TemplateName Name) { 2360 // If this template name refers to a template, the canonical 2361 // template name merely stores the template itself. 2362 if (TemplateDecl *Template = Name.getAsTemplateDecl()) 2363 return TemplateName(cast<TemplateDecl>(Template->getCanonicalDecl())); 2364 2365 assert(!Name.getAsOverloadedTemplate()); 2366 2367 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 2368 assert(DTN && "Non-dependent template names must refer to template decls."); 2369 return DTN->CanonicalTemplateName; 2370} 2371 2372bool ASTContext::hasSameTemplateName(TemplateName X, TemplateName Y) { 2373 X = getCanonicalTemplateName(X); 2374 Y = getCanonicalTemplateName(Y); 2375 return X.getAsVoidPointer() == Y.getAsVoidPointer(); 2376} 2377 2378TemplateArgument 2379ASTContext::getCanonicalTemplateArgument(const TemplateArgument &Arg) { 2380 switch (Arg.getKind()) { 2381 case TemplateArgument::Null: 2382 return Arg; 2383 2384 case TemplateArgument::Expression: 2385 return Arg; 2386 2387 case TemplateArgument::Declaration: 2388 return TemplateArgument(Arg.getAsDecl()->getCanonicalDecl()); 2389 2390 case TemplateArgument::Template: 2391 return TemplateArgument(getCanonicalTemplateName(Arg.getAsTemplate())); 2392 2393 case TemplateArgument::Integral: 2394 return TemplateArgument(*Arg.getAsIntegral(), 2395 getCanonicalType(Arg.getIntegralType())); 2396 2397 case TemplateArgument::Type: 2398 return TemplateArgument(getCanonicalType(Arg.getAsType())); 2399 2400 case TemplateArgument::Pack: { 2401 // FIXME: Allocate in ASTContext 2402 TemplateArgument *CanonArgs = new TemplateArgument[Arg.pack_size()]; 2403 unsigned Idx = 0; 2404 for (TemplateArgument::pack_iterator A = Arg.pack_begin(), 2405 AEnd = Arg.pack_end(); 2406 A != AEnd; (void)++A, ++Idx) 2407 CanonArgs[Idx] = getCanonicalTemplateArgument(*A); 2408 2409 TemplateArgument Result; 2410 Result.setArgumentPack(CanonArgs, Arg.pack_size(), false); 2411 return Result; 2412 } 2413 } 2414 2415 // Silence GCC warning 2416 assert(false && "Unhandled template argument kind"); 2417 return TemplateArgument(); 2418} 2419 2420NestedNameSpecifier * 2421ASTContext::getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) { 2422 if (!NNS) 2423 return 0; 2424 2425 switch (NNS->getKind()) { 2426 case NestedNameSpecifier::Identifier: 2427 // Canonicalize the prefix but keep the identifier the same. 2428 return NestedNameSpecifier::Create(*this, 2429 getCanonicalNestedNameSpecifier(NNS->getPrefix()), 2430 NNS->getAsIdentifier()); 2431 2432 case NestedNameSpecifier::Namespace: 2433 // A namespace is canonical; build a nested-name-specifier with 2434 // this namespace and no prefix. 2435 return NestedNameSpecifier::Create(*this, 0, NNS->getAsNamespace()); 2436 2437 case NestedNameSpecifier::TypeSpec: 2438 case NestedNameSpecifier::TypeSpecWithTemplate: { 2439 QualType T = getCanonicalType(QualType(NNS->getAsType(), 0)); 2440 return NestedNameSpecifier::Create(*this, 0, 2441 NNS->getKind() == NestedNameSpecifier::TypeSpecWithTemplate, 2442 T.getTypePtr()); 2443 } 2444 2445 case NestedNameSpecifier::Global: 2446 // The global specifier is canonical and unique. 2447 return NNS; 2448 } 2449 2450 // Required to silence a GCC warning 2451 return 0; 2452} 2453 2454 2455const ArrayType *ASTContext::getAsArrayType(QualType T) { 2456 // Handle the non-qualified case efficiently. 2457 if (!T.hasLocalQualifiers()) { 2458 // Handle the common positive case fast. 2459 if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 2460 return AT; 2461 } 2462 2463 // Handle the common negative case fast. 2464 QualType CType = T->getCanonicalTypeInternal(); 2465 if (!isa<ArrayType>(CType)) 2466 return 0; 2467 2468 // Apply any qualifiers from the array type to the element type. This 2469 // implements C99 6.7.3p8: "If the specification of an array type includes 2470 // any type qualifiers, the element type is so qualified, not the array type." 2471 2472 // If we get here, we either have type qualifiers on the type, or we have 2473 // sugar such as a typedef in the way. If we have type qualifiers on the type 2474 // we must propagate them down into the element type. 2475 2476 QualifierCollector Qs; 2477 const Type *Ty = Qs.strip(T.getDesugaredType()); 2478 2479 // If we have a simple case, just return now. 2480 const ArrayType *ATy = dyn_cast<ArrayType>(Ty); 2481 if (ATy == 0 || Qs.empty()) 2482 return ATy; 2483 2484 // Otherwise, we have an array and we have qualifiers on it. Push the 2485 // qualifiers into the array element type and return a new array type. 2486 // Get the canonical version of the element with the extra qualifiers on it. 2487 // This can recursively sink qualifiers through multiple levels of arrays. 2488 QualType NewEltTy = getQualifiedType(ATy->getElementType(), Qs); 2489 2490 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy)) 2491 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(), 2492 CAT->getSizeModifier(), 2493 CAT->getIndexTypeCVRQualifiers())); 2494 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy)) 2495 return cast<ArrayType>(getIncompleteArrayType(NewEltTy, 2496 IAT->getSizeModifier(), 2497 IAT->getIndexTypeCVRQualifiers())); 2498 2499 if (const DependentSizedArrayType *DSAT 2500 = dyn_cast<DependentSizedArrayType>(ATy)) 2501 return cast<ArrayType>( 2502 getDependentSizedArrayType(NewEltTy, 2503 DSAT->getSizeExpr() ? 2504 DSAT->getSizeExpr()->Retain() : 0, 2505 DSAT->getSizeModifier(), 2506 DSAT->getIndexTypeCVRQualifiers(), 2507 DSAT->getBracketsRange())); 2508 2509 const VariableArrayType *VAT = cast<VariableArrayType>(ATy); 2510 return cast<ArrayType>(getVariableArrayType(NewEltTy, 2511 VAT->getSizeExpr() ? 2512 VAT->getSizeExpr()->Retain() : 0, 2513 VAT->getSizeModifier(), 2514 VAT->getIndexTypeCVRQualifiers(), 2515 VAT->getBracketsRange())); 2516} 2517 2518 2519/// getArrayDecayedType - Return the properly qualified result of decaying the 2520/// specified array type to a pointer. This operation is non-trivial when 2521/// handling typedefs etc. The canonical type of "T" must be an array type, 2522/// this returns a pointer to a properly qualified element of the array. 2523/// 2524/// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 2525QualType ASTContext::getArrayDecayedType(QualType Ty) { 2526 // Get the element type with 'getAsArrayType' so that we don't lose any 2527 // typedefs in the element type of the array. This also handles propagation 2528 // of type qualifiers from the array type into the element type if present 2529 // (C99 6.7.3p8). 2530 const ArrayType *PrettyArrayType = getAsArrayType(Ty); 2531 assert(PrettyArrayType && "Not an array type!"); 2532 2533 QualType PtrTy = getPointerType(PrettyArrayType->getElementType()); 2534 2535 // int x[restrict 4] -> int *restrict 2536 return getQualifiedType(PtrTy, PrettyArrayType->getIndexTypeQualifiers()); 2537} 2538 2539QualType ASTContext::getBaseElementType(QualType QT) { 2540 QualifierCollector Qs; 2541 while (const ArrayType *AT = getAsArrayType(QualType(Qs.strip(QT), 0))) 2542 QT = AT->getElementType(); 2543 return Qs.apply(QT); 2544} 2545 2546QualType ASTContext::getBaseElementType(const ArrayType *AT) { 2547 QualType ElemTy = AT->getElementType(); 2548 2549 if (const ArrayType *AT = getAsArrayType(ElemTy)) 2550 return getBaseElementType(AT); 2551 2552 return ElemTy; 2553} 2554 2555/// getConstantArrayElementCount - Returns number of constant array elements. 2556uint64_t 2557ASTContext::getConstantArrayElementCount(const ConstantArrayType *CA) const { 2558 uint64_t ElementCount = 1; 2559 do { 2560 ElementCount *= CA->getSize().getZExtValue(); 2561 CA = dyn_cast<ConstantArrayType>(CA->getElementType()); 2562 } while (CA); 2563 return ElementCount; 2564} 2565 2566/// getFloatingRank - Return a relative rank for floating point types. 2567/// This routine will assert if passed a built-in type that isn't a float. 2568static FloatingRank getFloatingRank(QualType T) { 2569 if (const ComplexType *CT = T->getAs<ComplexType>()) 2570 return getFloatingRank(CT->getElementType()); 2571 2572 assert(T->getAs<BuiltinType>() && "getFloatingRank(): not a floating type"); 2573 switch (T->getAs<BuiltinType>()->getKind()) { 2574 default: assert(0 && "getFloatingRank(): not a floating type"); 2575 case BuiltinType::Float: return FloatRank; 2576 case BuiltinType::Double: return DoubleRank; 2577 case BuiltinType::LongDouble: return LongDoubleRank; 2578 } 2579} 2580 2581/// getFloatingTypeOfSizeWithinDomain - Returns a real floating 2582/// point or a complex type (based on typeDomain/typeSize). 2583/// 'typeDomain' is a real floating point or complex type. 2584/// 'typeSize' is a real floating point or complex type. 2585QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size, 2586 QualType Domain) const { 2587 FloatingRank EltRank = getFloatingRank(Size); 2588 if (Domain->isComplexType()) { 2589 switch (EltRank) { 2590 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2591 case FloatRank: return FloatComplexTy; 2592 case DoubleRank: return DoubleComplexTy; 2593 case LongDoubleRank: return LongDoubleComplexTy; 2594 } 2595 } 2596 2597 assert(Domain->isRealFloatingType() && "Unknown domain!"); 2598 switch (EltRank) { 2599 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2600 case FloatRank: return FloatTy; 2601 case DoubleRank: return DoubleTy; 2602 case LongDoubleRank: return LongDoubleTy; 2603 } 2604} 2605 2606/// getFloatingTypeOrder - Compare the rank of the two specified floating 2607/// point types, ignoring the domain of the type (i.e. 'double' == 2608/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 2609/// LHS < RHS, return -1. 2610int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) { 2611 FloatingRank LHSR = getFloatingRank(LHS); 2612 FloatingRank RHSR = getFloatingRank(RHS); 2613 2614 if (LHSR == RHSR) 2615 return 0; 2616 if (LHSR > RHSR) 2617 return 1; 2618 return -1; 2619} 2620 2621/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This 2622/// routine will assert if passed a built-in type that isn't an integer or enum, 2623/// or if it is not canonicalized. 2624unsigned ASTContext::getIntegerRank(Type *T) { 2625 assert(T->isCanonicalUnqualified() && "T should be canonicalized"); 2626 if (EnumType* ET = dyn_cast<EnumType>(T)) 2627 T = ET->getDecl()->getPromotionType().getTypePtr(); 2628 2629 if (T->isSpecificBuiltinType(BuiltinType::WChar)) 2630 T = getFromTargetType(Target.getWCharType()).getTypePtr(); 2631 2632 if (T->isSpecificBuiltinType(BuiltinType::Char16)) 2633 T = getFromTargetType(Target.getChar16Type()).getTypePtr(); 2634 2635 if (T->isSpecificBuiltinType(BuiltinType::Char32)) 2636 T = getFromTargetType(Target.getChar32Type()).getTypePtr(); 2637 2638 switch (cast<BuiltinType>(T)->getKind()) { 2639 default: assert(0 && "getIntegerRank(): not a built-in integer"); 2640 case BuiltinType::Bool: 2641 return 1 + (getIntWidth(BoolTy) << 3); 2642 case BuiltinType::Char_S: 2643 case BuiltinType::Char_U: 2644 case BuiltinType::SChar: 2645 case BuiltinType::UChar: 2646 return 2 + (getIntWidth(CharTy) << 3); 2647 case BuiltinType::Short: 2648 case BuiltinType::UShort: 2649 return 3 + (getIntWidth(ShortTy) << 3); 2650 case BuiltinType::Int: 2651 case BuiltinType::UInt: 2652 return 4 + (getIntWidth(IntTy) << 3); 2653 case BuiltinType::Long: 2654 case BuiltinType::ULong: 2655 return 5 + (getIntWidth(LongTy) << 3); 2656 case BuiltinType::LongLong: 2657 case BuiltinType::ULongLong: 2658 return 6 + (getIntWidth(LongLongTy) << 3); 2659 case BuiltinType::Int128: 2660 case BuiltinType::UInt128: 2661 return 7 + (getIntWidth(Int128Ty) << 3); 2662 } 2663} 2664 2665/// \brief Whether this is a promotable bitfield reference according 2666/// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 2667/// 2668/// \returns the type this bit-field will promote to, or NULL if no 2669/// promotion occurs. 2670QualType ASTContext::isPromotableBitField(Expr *E) { 2671 if (E->isTypeDependent() || E->isValueDependent()) 2672 return QualType(); 2673 2674 FieldDecl *Field = E->getBitField(); 2675 if (!Field) 2676 return QualType(); 2677 2678 QualType FT = Field->getType(); 2679 2680 llvm::APSInt BitWidthAP = Field->getBitWidth()->EvaluateAsInt(*this); 2681 uint64_t BitWidth = BitWidthAP.getZExtValue(); 2682 uint64_t IntSize = getTypeSize(IntTy); 2683 // GCC extension compatibility: if the bit-field size is less than or equal 2684 // to the size of int, it gets promoted no matter what its type is. 2685 // For instance, unsigned long bf : 4 gets promoted to signed int. 2686 if (BitWidth < IntSize) 2687 return IntTy; 2688 2689 if (BitWidth == IntSize) 2690 return FT->isSignedIntegerType() ? IntTy : UnsignedIntTy; 2691 2692 // Types bigger than int are not subject to promotions, and therefore act 2693 // like the base type. 2694 // FIXME: This doesn't quite match what gcc does, but what gcc does here 2695 // is ridiculous. 2696 return QualType(); 2697} 2698 2699/// getPromotedIntegerType - Returns the type that Promotable will 2700/// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 2701/// integer type. 2702QualType ASTContext::getPromotedIntegerType(QualType Promotable) { 2703 assert(!Promotable.isNull()); 2704 assert(Promotable->isPromotableIntegerType()); 2705 if (const EnumType *ET = Promotable->getAs<EnumType>()) 2706 return ET->getDecl()->getPromotionType(); 2707 if (Promotable->isSignedIntegerType()) 2708 return IntTy; 2709 uint64_t PromotableSize = getTypeSize(Promotable); 2710 uint64_t IntSize = getTypeSize(IntTy); 2711 assert(Promotable->isUnsignedIntegerType() && PromotableSize <= IntSize); 2712 return (PromotableSize != IntSize) ? IntTy : UnsignedIntTy; 2713} 2714 2715/// getIntegerTypeOrder - Returns the highest ranked integer type: 2716/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 2717/// LHS < RHS, return -1. 2718int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) { 2719 Type *LHSC = getCanonicalType(LHS).getTypePtr(); 2720 Type *RHSC = getCanonicalType(RHS).getTypePtr(); 2721 if (LHSC == RHSC) return 0; 2722 2723 bool LHSUnsigned = LHSC->isUnsignedIntegerType(); 2724 bool RHSUnsigned = RHSC->isUnsignedIntegerType(); 2725 2726 unsigned LHSRank = getIntegerRank(LHSC); 2727 unsigned RHSRank = getIntegerRank(RHSC); 2728 2729 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned. 2730 if (LHSRank == RHSRank) return 0; 2731 return LHSRank > RHSRank ? 1 : -1; 2732 } 2733 2734 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa. 2735 if (LHSUnsigned) { 2736 // If the unsigned [LHS] type is larger, return it. 2737 if (LHSRank >= RHSRank) 2738 return 1; 2739 2740 // If the signed type can represent all values of the unsigned type, it 2741 // wins. Because we are dealing with 2's complement and types that are 2742 // powers of two larger than each other, this is always safe. 2743 return -1; 2744 } 2745 2746 // If the unsigned [RHS] type is larger, return it. 2747 if (RHSRank >= LHSRank) 2748 return -1; 2749 2750 // If the signed type can represent all values of the unsigned type, it 2751 // wins. Because we are dealing with 2's complement and types that are 2752 // powers of two larger than each other, this is always safe. 2753 return 1; 2754} 2755 2756static RecordDecl * 2757CreateRecordDecl(ASTContext &Ctx, RecordDecl::TagKind TK, DeclContext *DC, 2758 SourceLocation L, IdentifierInfo *Id) { 2759 if (Ctx.getLangOptions().CPlusPlus) 2760 return CXXRecordDecl::Create(Ctx, TK, DC, L, Id); 2761 else 2762 return RecordDecl::Create(Ctx, TK, DC, L, Id); 2763} 2764 2765// getCFConstantStringType - Return the type used for constant CFStrings. 2766QualType ASTContext::getCFConstantStringType() { 2767 if (!CFConstantStringTypeDecl) { 2768 CFConstantStringTypeDecl = 2769 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 2770 &Idents.get("NSConstantString")); 2771 CFConstantStringTypeDecl->startDefinition(); 2772 2773 QualType FieldTypes[4]; 2774 2775 // const int *isa; 2776 FieldTypes[0] = getPointerType(IntTy.withConst()); 2777 // int flags; 2778 FieldTypes[1] = IntTy; 2779 // const char *str; 2780 FieldTypes[2] = getPointerType(CharTy.withConst()); 2781 // long length; 2782 FieldTypes[3] = LongTy; 2783 2784 // Create fields 2785 for (unsigned i = 0; i < 4; ++i) { 2786 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl, 2787 SourceLocation(), 0, 2788 FieldTypes[i], /*TInfo=*/0, 2789 /*BitWidth=*/0, 2790 /*Mutable=*/false); 2791 Field->setAccess(AS_public); 2792 CFConstantStringTypeDecl->addDecl(Field); 2793 } 2794 2795 CFConstantStringTypeDecl->completeDefinition(); 2796 } 2797 2798 return getTagDeclType(CFConstantStringTypeDecl); 2799} 2800 2801void ASTContext::setCFConstantStringType(QualType T) { 2802 const RecordType *Rec = T->getAs<RecordType>(); 2803 assert(Rec && "Invalid CFConstantStringType"); 2804 CFConstantStringTypeDecl = Rec->getDecl(); 2805} 2806 2807// getNSConstantStringType - Return the type used for constant NSStrings. 2808QualType ASTContext::getNSConstantStringType() { 2809 if (!NSConstantStringTypeDecl) { 2810 NSConstantStringTypeDecl = 2811 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 2812 &Idents.get("__builtin_NSString")); 2813 NSConstantStringTypeDecl->startDefinition(); 2814 2815 QualType FieldTypes[3]; 2816 2817 // const int *isa; 2818 FieldTypes[0] = getPointerType(IntTy.withConst()); 2819 // const char *str; 2820 FieldTypes[1] = getPointerType(CharTy.withConst()); 2821 // unsigned int length; 2822 FieldTypes[2] = UnsignedIntTy; 2823 2824 // Create fields 2825 for (unsigned i = 0; i < 3; ++i) { 2826 FieldDecl *Field = FieldDecl::Create(*this, NSConstantStringTypeDecl, 2827 SourceLocation(), 0, 2828 FieldTypes[i], /*TInfo=*/0, 2829 /*BitWidth=*/0, 2830 /*Mutable=*/false); 2831 Field->setAccess(AS_public); 2832 NSConstantStringTypeDecl->addDecl(Field); 2833 } 2834 2835 NSConstantStringTypeDecl->completeDefinition(); 2836 } 2837 2838 return getTagDeclType(NSConstantStringTypeDecl); 2839} 2840 2841void ASTContext::setNSConstantStringType(QualType T) { 2842 const RecordType *Rec = T->getAs<RecordType>(); 2843 assert(Rec && "Invalid NSConstantStringType"); 2844 NSConstantStringTypeDecl = Rec->getDecl(); 2845} 2846 2847QualType ASTContext::getObjCFastEnumerationStateType() { 2848 if (!ObjCFastEnumerationStateTypeDecl) { 2849 ObjCFastEnumerationStateTypeDecl = 2850 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 2851 &Idents.get("__objcFastEnumerationState")); 2852 ObjCFastEnumerationStateTypeDecl->startDefinition(); 2853 2854 QualType FieldTypes[] = { 2855 UnsignedLongTy, 2856 getPointerType(ObjCIdTypedefType), 2857 getPointerType(UnsignedLongTy), 2858 getConstantArrayType(UnsignedLongTy, 2859 llvm::APInt(32, 5), ArrayType::Normal, 0) 2860 }; 2861 2862 for (size_t i = 0; i < 4; ++i) { 2863 FieldDecl *Field = FieldDecl::Create(*this, 2864 ObjCFastEnumerationStateTypeDecl, 2865 SourceLocation(), 0, 2866 FieldTypes[i], /*TInfo=*/0, 2867 /*BitWidth=*/0, 2868 /*Mutable=*/false); 2869 Field->setAccess(AS_public); 2870 ObjCFastEnumerationStateTypeDecl->addDecl(Field); 2871 } 2872 if (getLangOptions().CPlusPlus) 2873 if (CXXRecordDecl *CXXRD = 2874 dyn_cast<CXXRecordDecl>(ObjCFastEnumerationStateTypeDecl)) 2875 CXXRD->setEmpty(false); 2876 2877 ObjCFastEnumerationStateTypeDecl->completeDefinition(); 2878 } 2879 2880 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 2881} 2882 2883QualType ASTContext::getBlockDescriptorType() { 2884 if (BlockDescriptorType) 2885 return getTagDeclType(BlockDescriptorType); 2886 2887 RecordDecl *T; 2888 // FIXME: Needs the FlagAppleBlock bit. 2889 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 2890 &Idents.get("__block_descriptor")); 2891 T->startDefinition(); 2892 2893 QualType FieldTypes[] = { 2894 UnsignedLongTy, 2895 UnsignedLongTy, 2896 }; 2897 2898 const char *FieldNames[] = { 2899 "reserved", 2900 "Size" 2901 }; 2902 2903 for (size_t i = 0; i < 2; ++i) { 2904 FieldDecl *Field = FieldDecl::Create(*this, 2905 T, 2906 SourceLocation(), 2907 &Idents.get(FieldNames[i]), 2908 FieldTypes[i], /*TInfo=*/0, 2909 /*BitWidth=*/0, 2910 /*Mutable=*/false); 2911 Field->setAccess(AS_public); 2912 T->addDecl(Field); 2913 } 2914 2915 T->completeDefinition(); 2916 2917 BlockDescriptorType = T; 2918 2919 return getTagDeclType(BlockDescriptorType); 2920} 2921 2922void ASTContext::setBlockDescriptorType(QualType T) { 2923 const RecordType *Rec = T->getAs<RecordType>(); 2924 assert(Rec && "Invalid BlockDescriptorType"); 2925 BlockDescriptorType = Rec->getDecl(); 2926} 2927 2928QualType ASTContext::getBlockDescriptorExtendedType() { 2929 if (BlockDescriptorExtendedType) 2930 return getTagDeclType(BlockDescriptorExtendedType); 2931 2932 RecordDecl *T; 2933 // FIXME: Needs the FlagAppleBlock bit. 2934 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 2935 &Idents.get("__block_descriptor_withcopydispose")); 2936 T->startDefinition(); 2937 2938 QualType FieldTypes[] = { 2939 UnsignedLongTy, 2940 UnsignedLongTy, 2941 getPointerType(VoidPtrTy), 2942 getPointerType(VoidPtrTy) 2943 }; 2944 2945 const char *FieldNames[] = { 2946 "reserved", 2947 "Size", 2948 "CopyFuncPtr", 2949 "DestroyFuncPtr" 2950 }; 2951 2952 for (size_t i = 0; i < 4; ++i) { 2953 FieldDecl *Field = FieldDecl::Create(*this, 2954 T, 2955 SourceLocation(), 2956 &Idents.get(FieldNames[i]), 2957 FieldTypes[i], /*TInfo=*/0, 2958 /*BitWidth=*/0, 2959 /*Mutable=*/false); 2960 Field->setAccess(AS_public); 2961 T->addDecl(Field); 2962 } 2963 2964 T->completeDefinition(); 2965 2966 BlockDescriptorExtendedType = T; 2967 2968 return getTagDeclType(BlockDescriptorExtendedType); 2969} 2970 2971void ASTContext::setBlockDescriptorExtendedType(QualType T) { 2972 const RecordType *Rec = T->getAs<RecordType>(); 2973 assert(Rec && "Invalid BlockDescriptorType"); 2974 BlockDescriptorExtendedType = Rec->getDecl(); 2975} 2976 2977bool ASTContext::BlockRequiresCopying(QualType Ty) { 2978 if (Ty->isBlockPointerType()) 2979 return true; 2980 if (isObjCNSObjectType(Ty)) 2981 return true; 2982 if (Ty->isObjCObjectPointerType()) 2983 return true; 2984 return false; 2985} 2986 2987QualType ASTContext::BuildByRefType(const char *DeclName, QualType Ty) { 2988 // type = struct __Block_byref_1_X { 2989 // void *__isa; 2990 // struct __Block_byref_1_X *__forwarding; 2991 // unsigned int __flags; 2992 // unsigned int __size; 2993 // void *__copy_helper; // as needed 2994 // void *__destroy_help // as needed 2995 // int X; 2996 // } * 2997 2998 bool HasCopyAndDispose = BlockRequiresCopying(Ty); 2999 3000 // FIXME: Move up 3001 static unsigned int UniqueBlockByRefTypeID = 0; 3002 llvm::SmallString<36> Name; 3003 llvm::raw_svector_ostream(Name) << "__Block_byref_" << 3004 ++UniqueBlockByRefTypeID << '_' << DeclName; 3005 RecordDecl *T; 3006 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3007 &Idents.get(Name.str())); 3008 T->startDefinition(); 3009 QualType Int32Ty = IntTy; 3010 assert(getIntWidth(IntTy) == 32 && "non-32bit int not supported"); 3011 QualType FieldTypes[] = { 3012 getPointerType(VoidPtrTy), 3013 getPointerType(getTagDeclType(T)), 3014 Int32Ty, 3015 Int32Ty, 3016 getPointerType(VoidPtrTy), 3017 getPointerType(VoidPtrTy), 3018 Ty 3019 }; 3020 3021 const char *FieldNames[] = { 3022 "__isa", 3023 "__forwarding", 3024 "__flags", 3025 "__size", 3026 "__copy_helper", 3027 "__destroy_helper", 3028 DeclName, 3029 }; 3030 3031 for (size_t i = 0; i < 7; ++i) { 3032 if (!HasCopyAndDispose && i >=4 && i <= 5) 3033 continue; 3034 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3035 &Idents.get(FieldNames[i]), 3036 FieldTypes[i], /*TInfo=*/0, 3037 /*BitWidth=*/0, /*Mutable=*/false); 3038 Field->setAccess(AS_public); 3039 T->addDecl(Field); 3040 } 3041 3042 T->completeDefinition(); 3043 3044 return getPointerType(getTagDeclType(T)); 3045} 3046 3047 3048QualType ASTContext::getBlockParmType( 3049 bool BlockHasCopyDispose, 3050 llvm::SmallVectorImpl<const Expr *> &Layout) { 3051 3052 // FIXME: Move up 3053 static unsigned int UniqueBlockParmTypeID = 0; 3054 llvm::SmallString<36> Name; 3055 llvm::raw_svector_ostream(Name) << "__block_literal_" 3056 << ++UniqueBlockParmTypeID; 3057 RecordDecl *T; 3058 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3059 &Idents.get(Name.str())); 3060 T->startDefinition(); 3061 QualType FieldTypes[] = { 3062 getPointerType(VoidPtrTy), 3063 IntTy, 3064 IntTy, 3065 getPointerType(VoidPtrTy), 3066 (BlockHasCopyDispose ? 3067 getPointerType(getBlockDescriptorExtendedType()) : 3068 getPointerType(getBlockDescriptorType())) 3069 }; 3070 3071 const char *FieldNames[] = { 3072 "__isa", 3073 "__flags", 3074 "__reserved", 3075 "__FuncPtr", 3076 "__descriptor" 3077 }; 3078 3079 for (size_t i = 0; i < 5; ++i) { 3080 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3081 &Idents.get(FieldNames[i]), 3082 FieldTypes[i], /*TInfo=*/0, 3083 /*BitWidth=*/0, /*Mutable=*/false); 3084 Field->setAccess(AS_public); 3085 T->addDecl(Field); 3086 } 3087 3088 for (unsigned i = 0; i < Layout.size(); ++i) { 3089 const Expr *E = Layout[i]; 3090 3091 QualType FieldType = E->getType(); 3092 IdentifierInfo *FieldName = 0; 3093 if (isa<CXXThisExpr>(E)) { 3094 FieldName = &Idents.get("this"); 3095 } else if (const BlockDeclRefExpr *BDRE = dyn_cast<BlockDeclRefExpr>(E)) { 3096 const ValueDecl *D = BDRE->getDecl(); 3097 FieldName = D->getIdentifier(); 3098 if (BDRE->isByRef()) 3099 FieldType = BuildByRefType(D->getNameAsCString(), FieldType); 3100 } else { 3101 // Padding. 3102 assert(isa<ConstantArrayType>(FieldType) && 3103 isa<DeclRefExpr>(E) && 3104 !cast<DeclRefExpr>(E)->getDecl()->getDeclName() && 3105 "doesn't match characteristics of padding decl"); 3106 } 3107 3108 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3109 FieldName, FieldType, /*TInfo=*/0, 3110 /*BitWidth=*/0, /*Mutable=*/false); 3111 Field->setAccess(AS_public); 3112 T->addDecl(Field); 3113 } 3114 3115 T->completeDefinition(); 3116 3117 return getPointerType(getTagDeclType(T)); 3118} 3119 3120void ASTContext::setObjCFastEnumerationStateType(QualType T) { 3121 const RecordType *Rec = T->getAs<RecordType>(); 3122 assert(Rec && "Invalid ObjCFAstEnumerationStateType"); 3123 ObjCFastEnumerationStateTypeDecl = Rec->getDecl(); 3124} 3125 3126// This returns true if a type has been typedefed to BOOL: 3127// typedef <type> BOOL; 3128static bool isTypeTypedefedAsBOOL(QualType T) { 3129 if (const TypedefType *TT = dyn_cast<TypedefType>(T)) 3130 if (IdentifierInfo *II = TT->getDecl()->getIdentifier()) 3131 return II->isStr("BOOL"); 3132 3133 return false; 3134} 3135 3136/// getObjCEncodingTypeSize returns size of type for objective-c encoding 3137/// purpose. 3138CharUnits ASTContext::getObjCEncodingTypeSize(QualType type) { 3139 CharUnits sz = getTypeSizeInChars(type); 3140 3141 // Make all integer and enum types at least as large as an int 3142 if (sz.isPositive() && type->isIntegralType()) 3143 sz = std::max(sz, getTypeSizeInChars(IntTy)); 3144 // Treat arrays as pointers, since that's how they're passed in. 3145 else if (type->isArrayType()) 3146 sz = getTypeSizeInChars(VoidPtrTy); 3147 return sz; 3148} 3149 3150static inline 3151std::string charUnitsToString(const CharUnits &CU) { 3152 return llvm::itostr(CU.getQuantity()); 3153} 3154 3155/// getObjCEncodingForBlockDecl - Return the encoded type for this block 3156/// declaration. 3157void ASTContext::getObjCEncodingForBlock(const BlockExpr *Expr, 3158 std::string& S) { 3159 const BlockDecl *Decl = Expr->getBlockDecl(); 3160 QualType BlockTy = 3161 Expr->getType()->getAs<BlockPointerType>()->getPointeeType(); 3162 // Encode result type. 3163 getObjCEncodingForType(BlockTy->getAs<FunctionType>()->getResultType(), S); 3164 // Compute size of all parameters. 3165 // Start with computing size of a pointer in number of bytes. 3166 // FIXME: There might(should) be a better way of doing this computation! 3167 SourceLocation Loc; 3168 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3169 CharUnits ParmOffset = PtrSize; 3170 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), 3171 E = Decl->param_end(); PI != E; ++PI) { 3172 QualType PType = (*PI)->getType(); 3173 CharUnits sz = getObjCEncodingTypeSize(PType); 3174 assert (sz.isPositive() && "BlockExpr - Incomplete param type"); 3175 ParmOffset += sz; 3176 } 3177 // Size of the argument frame 3178 S += charUnitsToString(ParmOffset); 3179 // Block pointer and offset. 3180 S += "@?0"; 3181 ParmOffset = PtrSize; 3182 3183 // Argument types. 3184 ParmOffset = PtrSize; 3185 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), E = 3186 Decl->param_end(); PI != E; ++PI) { 3187 ParmVarDecl *PVDecl = *PI; 3188 QualType PType = PVDecl->getOriginalType(); 3189 if (const ArrayType *AT = 3190 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3191 // Use array's original type only if it has known number of 3192 // elements. 3193 if (!isa<ConstantArrayType>(AT)) 3194 PType = PVDecl->getType(); 3195 } else if (PType->isFunctionType()) 3196 PType = PVDecl->getType(); 3197 getObjCEncodingForType(PType, S); 3198 S += charUnitsToString(ParmOffset); 3199 ParmOffset += getObjCEncodingTypeSize(PType); 3200 } 3201} 3202 3203/// getObjCEncodingForMethodDecl - Return the encoded type for this method 3204/// declaration. 3205void ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, 3206 std::string& S) { 3207 // FIXME: This is not very efficient. 3208 // Encode type qualifer, 'in', 'inout', etc. for the return type. 3209 getObjCEncodingForTypeQualifier(Decl->getObjCDeclQualifier(), S); 3210 // Encode result type. 3211 getObjCEncodingForType(Decl->getResultType(), S); 3212 // Compute size of all parameters. 3213 // Start with computing size of a pointer in number of bytes. 3214 // FIXME: There might(should) be a better way of doing this computation! 3215 SourceLocation Loc; 3216 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3217 // The first two arguments (self and _cmd) are pointers; account for 3218 // their size. 3219 CharUnits ParmOffset = 2 * PtrSize; 3220 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3221 E = Decl->sel_param_end(); PI != E; ++PI) { 3222 QualType PType = (*PI)->getType(); 3223 CharUnits sz = getObjCEncodingTypeSize(PType); 3224 assert (sz.isPositive() && 3225 "getObjCEncodingForMethodDecl - Incomplete param type"); 3226 ParmOffset += sz; 3227 } 3228 S += charUnitsToString(ParmOffset); 3229 S += "@0:"; 3230 S += charUnitsToString(PtrSize); 3231 3232 // Argument types. 3233 ParmOffset = 2 * PtrSize; 3234 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3235 E = Decl->sel_param_end(); PI != E; ++PI) { 3236 ParmVarDecl *PVDecl = *PI; 3237 QualType PType = PVDecl->getOriginalType(); 3238 if (const ArrayType *AT = 3239 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3240 // Use array's original type only if it has known number of 3241 // elements. 3242 if (!isa<ConstantArrayType>(AT)) 3243 PType = PVDecl->getType(); 3244 } else if (PType->isFunctionType()) 3245 PType = PVDecl->getType(); 3246 // Process argument qualifiers for user supplied arguments; such as, 3247 // 'in', 'inout', etc. 3248 getObjCEncodingForTypeQualifier(PVDecl->getObjCDeclQualifier(), S); 3249 getObjCEncodingForType(PType, S); 3250 S += charUnitsToString(ParmOffset); 3251 ParmOffset += getObjCEncodingTypeSize(PType); 3252 } 3253} 3254 3255/// getObjCEncodingForPropertyDecl - Return the encoded type for this 3256/// property declaration. If non-NULL, Container must be either an 3257/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be 3258/// NULL when getting encodings for protocol properties. 3259/// Property attributes are stored as a comma-delimited C string. The simple 3260/// attributes readonly and bycopy are encoded as single characters. The 3261/// parametrized attributes, getter=name, setter=name, and ivar=name, are 3262/// encoded as single characters, followed by an identifier. Property types 3263/// are also encoded as a parametrized attribute. The characters used to encode 3264/// these attributes are defined by the following enumeration: 3265/// @code 3266/// enum PropertyAttributes { 3267/// kPropertyReadOnly = 'R', // property is read-only. 3268/// kPropertyBycopy = 'C', // property is a copy of the value last assigned 3269/// kPropertyByref = '&', // property is a reference to the value last assigned 3270/// kPropertyDynamic = 'D', // property is dynamic 3271/// kPropertyGetter = 'G', // followed by getter selector name 3272/// kPropertySetter = 'S', // followed by setter selector name 3273/// kPropertyInstanceVariable = 'V' // followed by instance variable name 3274/// kPropertyType = 't' // followed by old-style type encoding. 3275/// kPropertyWeak = 'W' // 'weak' property 3276/// kPropertyStrong = 'P' // property GC'able 3277/// kPropertyNonAtomic = 'N' // property non-atomic 3278/// }; 3279/// @endcode 3280void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 3281 const Decl *Container, 3282 std::string& S) { 3283 // Collect information from the property implementation decl(s). 3284 bool Dynamic = false; 3285 ObjCPropertyImplDecl *SynthesizePID = 0; 3286 3287 // FIXME: Duplicated code due to poor abstraction. 3288 if (Container) { 3289 if (const ObjCCategoryImplDecl *CID = 3290 dyn_cast<ObjCCategoryImplDecl>(Container)) { 3291 for (ObjCCategoryImplDecl::propimpl_iterator 3292 i = CID->propimpl_begin(), e = CID->propimpl_end(); 3293 i != e; ++i) { 3294 ObjCPropertyImplDecl *PID = *i; 3295 if (PID->getPropertyDecl() == PD) { 3296 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3297 Dynamic = true; 3298 } else { 3299 SynthesizePID = PID; 3300 } 3301 } 3302 } 3303 } else { 3304 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container); 3305 for (ObjCCategoryImplDecl::propimpl_iterator 3306 i = OID->propimpl_begin(), e = OID->propimpl_end(); 3307 i != e; ++i) { 3308 ObjCPropertyImplDecl *PID = *i; 3309 if (PID->getPropertyDecl() == PD) { 3310 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3311 Dynamic = true; 3312 } else { 3313 SynthesizePID = PID; 3314 } 3315 } 3316 } 3317 } 3318 } 3319 3320 // FIXME: This is not very efficient. 3321 S = "T"; 3322 3323 // Encode result type. 3324 // GCC has some special rules regarding encoding of properties which 3325 // closely resembles encoding of ivars. 3326 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, 0, 3327 true /* outermost type */, 3328 true /* encoding for property */); 3329 3330 if (PD->isReadOnly()) { 3331 S += ",R"; 3332 } else { 3333 switch (PD->getSetterKind()) { 3334 case ObjCPropertyDecl::Assign: break; 3335 case ObjCPropertyDecl::Copy: S += ",C"; break; 3336 case ObjCPropertyDecl::Retain: S += ",&"; break; 3337 } 3338 } 3339 3340 // It really isn't clear at all what this means, since properties 3341 // are "dynamic by default". 3342 if (Dynamic) 3343 S += ",D"; 3344 3345 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) 3346 S += ",N"; 3347 3348 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) { 3349 S += ",G"; 3350 S += PD->getGetterName().getAsString(); 3351 } 3352 3353 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) { 3354 S += ",S"; 3355 S += PD->getSetterName().getAsString(); 3356 } 3357 3358 if (SynthesizePID) { 3359 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl(); 3360 S += ",V"; 3361 S += OID->getNameAsString(); 3362 } 3363 3364 // FIXME: OBJCGC: weak & strong 3365} 3366 3367/// getLegacyIntegralTypeEncoding - 3368/// Another legacy compatibility encoding: 32-bit longs are encoded as 3369/// 'l' or 'L' , but not always. For typedefs, we need to use 3370/// 'i' or 'I' instead if encoding a struct field, or a pointer! 3371/// 3372void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const { 3373 if (isa<TypedefType>(PointeeTy.getTypePtr())) { 3374 if (const BuiltinType *BT = PointeeTy->getAs<BuiltinType>()) { 3375 if (BT->getKind() == BuiltinType::ULong && 3376 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3377 PointeeTy = UnsignedIntTy; 3378 else 3379 if (BT->getKind() == BuiltinType::Long && 3380 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3381 PointeeTy = IntTy; 3382 } 3383 } 3384} 3385 3386void ASTContext::getObjCEncodingForType(QualType T, std::string& S, 3387 const FieldDecl *Field) { 3388 // We follow the behavior of gcc, expanding structures which are 3389 // directly pointed to, and expanding embedded structures. Note that 3390 // these rules are sufficient to prevent recursive encoding of the 3391 // same type. 3392 getObjCEncodingForTypeImpl(T, S, true, true, Field, 3393 true /* outermost type */); 3394} 3395 3396static char ObjCEncodingForPrimitiveKind(const ASTContext *C, QualType T) { 3397 switch (T->getAs<BuiltinType>()->getKind()) { 3398 default: assert(0 && "Unhandled builtin type kind"); 3399 case BuiltinType::Void: return 'v'; 3400 case BuiltinType::Bool: return 'B'; 3401 case BuiltinType::Char_U: 3402 case BuiltinType::UChar: return 'C'; 3403 case BuiltinType::UShort: return 'S'; 3404 case BuiltinType::UInt: return 'I'; 3405 case BuiltinType::ULong: 3406 return 3407 (const_cast<ASTContext *>(C))->getIntWidth(T) == 32 ? 'L' : 'Q'; 3408 case BuiltinType::UInt128: return 'T'; 3409 case BuiltinType::ULongLong: return 'Q'; 3410 case BuiltinType::Char_S: 3411 case BuiltinType::SChar: return 'c'; 3412 case BuiltinType::Short: return 's'; 3413 case BuiltinType::Int: return 'i'; 3414 case BuiltinType::Long: 3415 return 3416 (const_cast<ASTContext *>(C))->getIntWidth(T) == 32 ? 'l' : 'q'; 3417 case BuiltinType::LongLong: return 'q'; 3418 case BuiltinType::Int128: return 't'; 3419 case BuiltinType::Float: return 'f'; 3420 case BuiltinType::Double: return 'd'; 3421 case BuiltinType::LongDouble: return 'd'; 3422 } 3423} 3424 3425static void EncodeBitField(const ASTContext *Context, std::string& S, 3426 QualType T, const FieldDecl *FD) { 3427 const Expr *E = FD->getBitWidth(); 3428 assert(E && "bitfield width not there - getObjCEncodingForTypeImpl"); 3429 ASTContext *Ctx = const_cast<ASTContext*>(Context); 3430 S += 'b'; 3431 // The NeXT runtime encodes bit fields as b followed by the number of bits. 3432 // The GNU runtime requires more information; bitfields are encoded as b, 3433 // then the offset (in bits) of the first element, then the type of the 3434 // bitfield, then the size in bits. For example, in this structure: 3435 // 3436 // struct 3437 // { 3438 // int integer; 3439 // int flags:2; 3440 // }; 3441 // On a 32-bit system, the encoding for flags would be b2 for the NeXT 3442 // runtime, but b32i2 for the GNU runtime. The reason for this extra 3443 // information is not especially sensible, but we're stuck with it for 3444 // compatibility with GCC, although providing it breaks anything that 3445 // actually uses runtime introspection and wants to work on both runtimes... 3446 if (!Ctx->getLangOptions().NeXTRuntime) { 3447 const RecordDecl *RD = FD->getParent(); 3448 const ASTRecordLayout &RL = Ctx->getASTRecordLayout(RD); 3449 // FIXME: This same linear search is also used in ExprConstant - it might 3450 // be better if the FieldDecl stored its offset. We'd be increasing the 3451 // size of the object slightly, but saving some time every time it is used. 3452 unsigned i = 0; 3453 for (RecordDecl::field_iterator Field = RD->field_begin(), 3454 FieldEnd = RD->field_end(); 3455 Field != FieldEnd; (void)++Field, ++i) { 3456 if (*Field == FD) 3457 break; 3458 } 3459 S += llvm::utostr(RL.getFieldOffset(i)); 3460 S += ObjCEncodingForPrimitiveKind(Context, T); 3461 } 3462 unsigned N = E->EvaluateAsInt(*Ctx).getZExtValue(); 3463 S += llvm::utostr(N); 3464} 3465 3466// FIXME: Use SmallString for accumulating string. 3467void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S, 3468 bool ExpandPointedToStructures, 3469 bool ExpandStructures, 3470 const FieldDecl *FD, 3471 bool OutermostType, 3472 bool EncodingProperty) { 3473 if (T->getAs<BuiltinType>()) { 3474 if (FD && FD->isBitField()) 3475 return EncodeBitField(this, S, T, FD); 3476 S += ObjCEncodingForPrimitiveKind(this, T); 3477 return; 3478 } 3479 3480 if (const ComplexType *CT = T->getAs<ComplexType>()) { 3481 S += 'j'; 3482 getObjCEncodingForTypeImpl(CT->getElementType(), S, false, false, 0, false, 3483 false); 3484 return; 3485 } 3486 3487 // encoding for pointer or r3eference types. 3488 QualType PointeeTy; 3489 if (const PointerType *PT = T->getAs<PointerType>()) { 3490 if (PT->isObjCSelType()) { 3491 S += ':'; 3492 return; 3493 } 3494 PointeeTy = PT->getPointeeType(); 3495 } 3496 else if (const ReferenceType *RT = T->getAs<ReferenceType>()) 3497 PointeeTy = RT->getPointeeType(); 3498 if (!PointeeTy.isNull()) { 3499 bool isReadOnly = false; 3500 // For historical/compatibility reasons, the read-only qualifier of the 3501 // pointee gets emitted _before_ the '^'. The read-only qualifier of 3502 // the pointer itself gets ignored, _unless_ we are looking at a typedef! 3503 // Also, do not emit the 'r' for anything but the outermost type! 3504 if (isa<TypedefType>(T.getTypePtr())) { 3505 if (OutermostType && T.isConstQualified()) { 3506 isReadOnly = true; 3507 S += 'r'; 3508 } 3509 } else if (OutermostType) { 3510 QualType P = PointeeTy; 3511 while (P->getAs<PointerType>()) 3512 P = P->getAs<PointerType>()->getPointeeType(); 3513 if (P.isConstQualified()) { 3514 isReadOnly = true; 3515 S += 'r'; 3516 } 3517 } 3518 if (isReadOnly) { 3519 // Another legacy compatibility encoding. Some ObjC qualifier and type 3520 // combinations need to be rearranged. 3521 // Rewrite "in const" from "nr" to "rn" 3522 if (llvm::StringRef(S).endswith("nr")) 3523 S.replace(S.end()-2, S.end(), "rn"); 3524 } 3525 3526 if (PointeeTy->isCharType()) { 3527 // char pointer types should be encoded as '*' unless it is a 3528 // type that has been typedef'd to 'BOOL'. 3529 if (!isTypeTypedefedAsBOOL(PointeeTy)) { 3530 S += '*'; 3531 return; 3532 } 3533 } else if (const RecordType *RTy = PointeeTy->getAs<RecordType>()) { 3534 // GCC binary compat: Need to convert "struct objc_class *" to "#". 3535 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_class")) { 3536 S += '#'; 3537 return; 3538 } 3539 // GCC binary compat: Need to convert "struct objc_object *" to "@". 3540 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_object")) { 3541 S += '@'; 3542 return; 3543 } 3544 // fall through... 3545 } 3546 S += '^'; 3547 getLegacyIntegralTypeEncoding(PointeeTy); 3548 3549 getObjCEncodingForTypeImpl(PointeeTy, S, false, ExpandPointedToStructures, 3550 NULL); 3551 return; 3552 } 3553 3554 if (const ArrayType *AT = 3555 // Ignore type qualifiers etc. 3556 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) { 3557 if (isa<IncompleteArrayType>(AT)) { 3558 // Incomplete arrays are encoded as a pointer to the array element. 3559 S += '^'; 3560 3561 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3562 false, ExpandStructures, FD); 3563 } else { 3564 S += '['; 3565 3566 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 3567 S += llvm::utostr(CAT->getSize().getZExtValue()); 3568 else { 3569 //Variable length arrays are encoded as a regular array with 0 elements. 3570 assert(isa<VariableArrayType>(AT) && "Unknown array type!"); 3571 S += '0'; 3572 } 3573 3574 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3575 false, ExpandStructures, FD); 3576 S += ']'; 3577 } 3578 return; 3579 } 3580 3581 if (T->getAs<FunctionType>()) { 3582 S += '?'; 3583 return; 3584 } 3585 3586 if (const RecordType *RTy = T->getAs<RecordType>()) { 3587 RecordDecl *RDecl = RTy->getDecl(); 3588 S += RDecl->isUnion() ? '(' : '{'; 3589 // Anonymous structures print as '?' 3590 if (const IdentifierInfo *II = RDecl->getIdentifier()) { 3591 S += II->getName(); 3592 if (ClassTemplateSpecializationDecl *Spec 3593 = dyn_cast<ClassTemplateSpecializationDecl>(RDecl)) { 3594 const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs(); 3595 std::string TemplateArgsStr 3596 = TemplateSpecializationType::PrintTemplateArgumentList( 3597 TemplateArgs.getFlatArgumentList(), 3598 TemplateArgs.flat_size(), 3599 (*this).PrintingPolicy); 3600 3601 S += TemplateArgsStr; 3602 } 3603 } else { 3604 S += '?'; 3605 } 3606 if (ExpandStructures) { 3607 S += '='; 3608 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 3609 FieldEnd = RDecl->field_end(); 3610 Field != FieldEnd; ++Field) { 3611 if (FD) { 3612 S += '"'; 3613 S += Field->getNameAsString(); 3614 S += '"'; 3615 } 3616 3617 // Special case bit-fields. 3618 if (Field->isBitField()) { 3619 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, 3620 (*Field)); 3621 } else { 3622 QualType qt = Field->getType(); 3623 getLegacyIntegralTypeEncoding(qt); 3624 getObjCEncodingForTypeImpl(qt, S, false, true, 3625 FD); 3626 } 3627 } 3628 } 3629 S += RDecl->isUnion() ? ')' : '}'; 3630 return; 3631 } 3632 3633 if (T->isEnumeralType()) { 3634 if (FD && FD->isBitField()) 3635 EncodeBitField(this, S, T, FD); 3636 else 3637 S += 'i'; 3638 return; 3639 } 3640 3641 if (T->isBlockPointerType()) { 3642 S += "@?"; // Unlike a pointer-to-function, which is "^?". 3643 return; 3644 } 3645 3646 // Ignore protocol qualifiers when mangling at this level. 3647 if (const ObjCObjectType *OT = T->getAs<ObjCObjectType>()) 3648 T = OT->getBaseType(); 3649 3650 if (const ObjCInterfaceType *OIT = T->getAs<ObjCInterfaceType>()) { 3651 // @encode(class_name) 3652 ObjCInterfaceDecl *OI = OIT->getDecl(); 3653 S += '{'; 3654 const IdentifierInfo *II = OI->getIdentifier(); 3655 S += II->getName(); 3656 S += '='; 3657 llvm::SmallVector<FieldDecl*, 32> RecFields; 3658 CollectObjCIvars(OI, RecFields); 3659 for (unsigned i = 0, e = RecFields.size(); i != e; ++i) { 3660 if (RecFields[i]->isBitField()) 3661 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 3662 RecFields[i]); 3663 else 3664 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 3665 FD); 3666 } 3667 S += '}'; 3668 return; 3669 } 3670 3671 if (const ObjCObjectPointerType *OPT = T->getAs<ObjCObjectPointerType>()) { 3672 if (OPT->isObjCIdType()) { 3673 S += '@'; 3674 return; 3675 } 3676 3677 if (OPT->isObjCClassType() || OPT->isObjCQualifiedClassType()) { 3678 // FIXME: Consider if we need to output qualifiers for 'Class<p>'. 3679 // Since this is a binary compatibility issue, need to consult with runtime 3680 // folks. Fortunately, this is a *very* obsure construct. 3681 S += '#'; 3682 return; 3683 } 3684 3685 if (OPT->isObjCQualifiedIdType()) { 3686 getObjCEncodingForTypeImpl(getObjCIdType(), S, 3687 ExpandPointedToStructures, 3688 ExpandStructures, FD); 3689 if (FD || EncodingProperty) { 3690 // Note that we do extended encoding of protocol qualifer list 3691 // Only when doing ivar or property encoding. 3692 S += '"'; 3693 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 3694 E = OPT->qual_end(); I != E; ++I) { 3695 S += '<'; 3696 S += (*I)->getNameAsString(); 3697 S += '>'; 3698 } 3699 S += '"'; 3700 } 3701 return; 3702 } 3703 3704 QualType PointeeTy = OPT->getPointeeType(); 3705 if (!EncodingProperty && 3706 isa<TypedefType>(PointeeTy.getTypePtr())) { 3707 // Another historical/compatibility reason. 3708 // We encode the underlying type which comes out as 3709 // {...}; 3710 S += '^'; 3711 getObjCEncodingForTypeImpl(PointeeTy, S, 3712 false, ExpandPointedToStructures, 3713 NULL); 3714 return; 3715 } 3716 3717 S += '@'; 3718 if (OPT->getInterfaceDecl() && (FD || EncodingProperty)) { 3719 S += '"'; 3720 S += OPT->getInterfaceDecl()->getIdentifier()->getName(); 3721 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 3722 E = OPT->qual_end(); I != E; ++I) { 3723 S += '<'; 3724 S += (*I)->getNameAsString(); 3725 S += '>'; 3726 } 3727 S += '"'; 3728 } 3729 return; 3730 } 3731 3732 // gcc just blithely ignores member pointers. 3733 // TODO: maybe there should be a mangling for these 3734 if (T->getAs<MemberPointerType>()) 3735 return; 3736 3737 assert(0 && "@encode for type not implemented!"); 3738} 3739 3740void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 3741 std::string& S) const { 3742 if (QT & Decl::OBJC_TQ_In) 3743 S += 'n'; 3744 if (QT & Decl::OBJC_TQ_Inout) 3745 S += 'N'; 3746 if (QT & Decl::OBJC_TQ_Out) 3747 S += 'o'; 3748 if (QT & Decl::OBJC_TQ_Bycopy) 3749 S += 'O'; 3750 if (QT & Decl::OBJC_TQ_Byref) 3751 S += 'R'; 3752 if (QT & Decl::OBJC_TQ_Oneway) 3753 S += 'V'; 3754} 3755 3756void ASTContext::setBuiltinVaListType(QualType T) { 3757 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!"); 3758 3759 BuiltinVaListType = T; 3760} 3761 3762void ASTContext::setObjCIdType(QualType T) { 3763 ObjCIdTypedefType = T; 3764} 3765 3766void ASTContext::setObjCSelType(QualType T) { 3767 ObjCSelTypedefType = T; 3768} 3769 3770void ASTContext::setObjCProtoType(QualType QT) { 3771 ObjCProtoType = QT; 3772} 3773 3774void ASTContext::setObjCClassType(QualType T) { 3775 ObjCClassTypedefType = T; 3776} 3777 3778void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) { 3779 assert(ObjCConstantStringType.isNull() && 3780 "'NSConstantString' type already set!"); 3781 3782 ObjCConstantStringType = getObjCInterfaceType(Decl); 3783} 3784 3785/// \brief Retrieve the template name that corresponds to a non-empty 3786/// lookup. 3787TemplateName ASTContext::getOverloadedTemplateName(UnresolvedSetIterator Begin, 3788 UnresolvedSetIterator End) { 3789 unsigned size = End - Begin; 3790 assert(size > 1 && "set is not overloaded!"); 3791 3792 void *memory = Allocate(sizeof(OverloadedTemplateStorage) + 3793 size * sizeof(FunctionTemplateDecl*)); 3794 OverloadedTemplateStorage *OT = new(memory) OverloadedTemplateStorage(size); 3795 3796 NamedDecl **Storage = OT->getStorage(); 3797 for (UnresolvedSetIterator I = Begin; I != End; ++I) { 3798 NamedDecl *D = *I; 3799 assert(isa<FunctionTemplateDecl>(D) || 3800 (isa<UsingShadowDecl>(D) && 3801 isa<FunctionTemplateDecl>(D->getUnderlyingDecl()))); 3802 *Storage++ = D; 3803 } 3804 3805 return TemplateName(OT); 3806} 3807 3808/// \brief Retrieve the template name that represents a qualified 3809/// template name such as \c std::vector. 3810TemplateName ASTContext::getQualifiedTemplateName(NestedNameSpecifier *NNS, 3811 bool TemplateKeyword, 3812 TemplateDecl *Template) { 3813 // FIXME: Canonicalization? 3814 llvm::FoldingSetNodeID ID; 3815 QualifiedTemplateName::Profile(ID, NNS, TemplateKeyword, Template); 3816 3817 void *InsertPos = 0; 3818 QualifiedTemplateName *QTN = 3819 QualifiedTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3820 if (!QTN) { 3821 QTN = new (*this,4) QualifiedTemplateName(NNS, TemplateKeyword, Template); 3822 QualifiedTemplateNames.InsertNode(QTN, InsertPos); 3823 } 3824 3825 return TemplateName(QTN); 3826} 3827 3828/// \brief Retrieve the template name that represents a dependent 3829/// template name such as \c MetaFun::template apply. 3830TemplateName ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 3831 const IdentifierInfo *Name) { 3832 assert((!NNS || NNS->isDependent()) && 3833 "Nested name specifier must be dependent"); 3834 3835 llvm::FoldingSetNodeID ID; 3836 DependentTemplateName::Profile(ID, NNS, Name); 3837 3838 void *InsertPos = 0; 3839 DependentTemplateName *QTN = 3840 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3841 3842 if (QTN) 3843 return TemplateName(QTN); 3844 3845 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 3846 if (CanonNNS == NNS) { 3847 QTN = new (*this,4) DependentTemplateName(NNS, Name); 3848 } else { 3849 TemplateName Canon = getDependentTemplateName(CanonNNS, Name); 3850 QTN = new (*this,4) DependentTemplateName(NNS, Name, Canon); 3851 DependentTemplateName *CheckQTN = 3852 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3853 assert(!CheckQTN && "Dependent type name canonicalization broken"); 3854 (void)CheckQTN; 3855 } 3856 3857 DependentTemplateNames.InsertNode(QTN, InsertPos); 3858 return TemplateName(QTN); 3859} 3860 3861/// \brief Retrieve the template name that represents a dependent 3862/// template name such as \c MetaFun::template operator+. 3863TemplateName 3864ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 3865 OverloadedOperatorKind Operator) { 3866 assert((!NNS || NNS->isDependent()) && 3867 "Nested name specifier must be dependent"); 3868 3869 llvm::FoldingSetNodeID ID; 3870 DependentTemplateName::Profile(ID, NNS, Operator); 3871 3872 void *InsertPos = 0; 3873 DependentTemplateName *QTN 3874 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3875 3876 if (QTN) 3877 return TemplateName(QTN); 3878 3879 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 3880 if (CanonNNS == NNS) { 3881 QTN = new (*this,4) DependentTemplateName(NNS, Operator); 3882 } else { 3883 TemplateName Canon = getDependentTemplateName(CanonNNS, Operator); 3884 QTN = new (*this,4) DependentTemplateName(NNS, Operator, Canon); 3885 3886 DependentTemplateName *CheckQTN 3887 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3888 assert(!CheckQTN && "Dependent template name canonicalization broken"); 3889 (void)CheckQTN; 3890 } 3891 3892 DependentTemplateNames.InsertNode(QTN, InsertPos); 3893 return TemplateName(QTN); 3894} 3895 3896/// getFromTargetType - Given one of the integer types provided by 3897/// TargetInfo, produce the corresponding type. The unsigned @p Type 3898/// is actually a value of type @c TargetInfo::IntType. 3899CanQualType ASTContext::getFromTargetType(unsigned Type) const { 3900 switch (Type) { 3901 case TargetInfo::NoInt: return CanQualType(); 3902 case TargetInfo::SignedShort: return ShortTy; 3903 case TargetInfo::UnsignedShort: return UnsignedShortTy; 3904 case TargetInfo::SignedInt: return IntTy; 3905 case TargetInfo::UnsignedInt: return UnsignedIntTy; 3906 case TargetInfo::SignedLong: return LongTy; 3907 case TargetInfo::UnsignedLong: return UnsignedLongTy; 3908 case TargetInfo::SignedLongLong: return LongLongTy; 3909 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy; 3910 } 3911 3912 assert(false && "Unhandled TargetInfo::IntType value"); 3913 return CanQualType(); 3914} 3915 3916//===----------------------------------------------------------------------===// 3917// Type Predicates. 3918//===----------------------------------------------------------------------===// 3919 3920/// isObjCNSObjectType - Return true if this is an NSObject object using 3921/// NSObject attribute on a c-style pointer type. 3922/// FIXME - Make it work directly on types. 3923/// FIXME: Move to Type. 3924/// 3925bool ASTContext::isObjCNSObjectType(QualType Ty) const { 3926 if (TypedefType *TDT = dyn_cast<TypedefType>(Ty)) { 3927 if (TypedefDecl *TD = TDT->getDecl()) 3928 if (TD->getAttr<ObjCNSObjectAttr>()) 3929 return true; 3930 } 3931 return false; 3932} 3933 3934/// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 3935/// garbage collection attribute. 3936/// 3937Qualifiers::GC ASTContext::getObjCGCAttrKind(const QualType &Ty) const { 3938 Qualifiers::GC GCAttrs = Qualifiers::GCNone; 3939 if (getLangOptions().ObjC1 && 3940 getLangOptions().getGCMode() != LangOptions::NonGC) { 3941 GCAttrs = Ty.getObjCGCAttr(); 3942 // Default behavious under objective-c's gc is for objective-c pointers 3943 // (or pointers to them) be treated as though they were declared 3944 // as __strong. 3945 if (GCAttrs == Qualifiers::GCNone) { 3946 if (Ty->isObjCObjectPointerType() || Ty->isBlockPointerType()) 3947 GCAttrs = Qualifiers::Strong; 3948 else if (Ty->isPointerType()) 3949 return getObjCGCAttrKind(Ty->getAs<PointerType>()->getPointeeType()); 3950 } 3951 // Non-pointers have none gc'able attribute regardless of the attribute 3952 // set on them. 3953 else if (!Ty->isAnyPointerType() && !Ty->isBlockPointerType()) 3954 return Qualifiers::GCNone; 3955 } 3956 return GCAttrs; 3957} 3958 3959//===----------------------------------------------------------------------===// 3960// Type Compatibility Testing 3961//===----------------------------------------------------------------------===// 3962 3963/// areCompatVectorTypes - Return true if the two specified vector types are 3964/// compatible. 3965static bool areCompatVectorTypes(const VectorType *LHS, 3966 const VectorType *RHS) { 3967 assert(LHS->isCanonicalUnqualified() && RHS->isCanonicalUnqualified()); 3968 return LHS->getElementType() == RHS->getElementType() && 3969 LHS->getNumElements() == RHS->getNumElements(); 3970} 3971 3972//===----------------------------------------------------------------------===// 3973// ObjCQualifiedIdTypesAreCompatible - Compatibility testing for qualified id's. 3974//===----------------------------------------------------------------------===// 3975 3976/// ProtocolCompatibleWithProtocol - return 'true' if 'lProto' is in the 3977/// inheritance hierarchy of 'rProto'. 3978bool ASTContext::ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 3979 ObjCProtocolDecl *rProto) { 3980 if (lProto == rProto) 3981 return true; 3982 for (ObjCProtocolDecl::protocol_iterator PI = rProto->protocol_begin(), 3983 E = rProto->protocol_end(); PI != E; ++PI) 3984 if (ProtocolCompatibleWithProtocol(lProto, *PI)) 3985 return true; 3986 return false; 3987} 3988 3989/// QualifiedIdConformsQualifiedId - compare id<p,...> with id<p1,...> 3990/// return true if lhs's protocols conform to rhs's protocol; false 3991/// otherwise. 3992bool ASTContext::QualifiedIdConformsQualifiedId(QualType lhs, QualType rhs) { 3993 if (lhs->isObjCQualifiedIdType() && rhs->isObjCQualifiedIdType()) 3994 return ObjCQualifiedIdTypesAreCompatible(lhs, rhs, false); 3995 return false; 3996} 3997 3998/// ObjCQualifiedIdTypesAreCompatible - We know that one of lhs/rhs is an 3999/// ObjCQualifiedIDType. 4000bool ASTContext::ObjCQualifiedIdTypesAreCompatible(QualType lhs, QualType rhs, 4001 bool compare) { 4002 // Allow id<P..> and an 'id' or void* type in all cases. 4003 if (lhs->isVoidPointerType() || 4004 lhs->isObjCIdType() || lhs->isObjCClassType()) 4005 return true; 4006 else if (rhs->isVoidPointerType() || 4007 rhs->isObjCIdType() || rhs->isObjCClassType()) 4008 return true; 4009 4010 if (const ObjCObjectPointerType *lhsQID = lhs->getAsObjCQualifiedIdType()) { 4011 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 4012 4013 if (!rhsOPT) return false; 4014 4015 if (rhsOPT->qual_empty()) { 4016 // If the RHS is a unqualified interface pointer "NSString*", 4017 // make sure we check the class hierarchy. 4018 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4019 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4020 E = lhsQID->qual_end(); I != E; ++I) { 4021 // when comparing an id<P> on lhs with a static type on rhs, 4022 // see if static class implements all of id's protocols, directly or 4023 // through its super class and categories. 4024 if (!rhsID->ClassImplementsProtocol(*I, true)) 4025 return false; 4026 } 4027 } 4028 // If there are no qualifiers and no interface, we have an 'id'. 4029 return true; 4030 } 4031 // Both the right and left sides have qualifiers. 4032 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4033 E = lhsQID->qual_end(); I != E; ++I) { 4034 ObjCProtocolDecl *lhsProto = *I; 4035 bool match = false; 4036 4037 // when comparing an id<P> on lhs with a static type on rhs, 4038 // see if static class implements all of id's protocols, directly or 4039 // through its super class and categories. 4040 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 4041 E = rhsOPT->qual_end(); J != E; ++J) { 4042 ObjCProtocolDecl *rhsProto = *J; 4043 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4044 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4045 match = true; 4046 break; 4047 } 4048 } 4049 // If the RHS is a qualified interface pointer "NSString<P>*", 4050 // make sure we check the class hierarchy. 4051 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4052 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4053 E = lhsQID->qual_end(); I != E; ++I) { 4054 // when comparing an id<P> on lhs with a static type on rhs, 4055 // see if static class implements all of id's protocols, directly or 4056 // through its super class and categories. 4057 if (rhsID->ClassImplementsProtocol(*I, true)) { 4058 match = true; 4059 break; 4060 } 4061 } 4062 } 4063 if (!match) 4064 return false; 4065 } 4066 4067 return true; 4068 } 4069 4070 const ObjCObjectPointerType *rhsQID = rhs->getAsObjCQualifiedIdType(); 4071 assert(rhsQID && "One of the LHS/RHS should be id<x>"); 4072 4073 if (const ObjCObjectPointerType *lhsOPT = 4074 lhs->getAsObjCInterfacePointerType()) { 4075 if (lhsOPT->qual_empty()) { 4076 bool match = false; 4077 if (ObjCInterfaceDecl *lhsID = lhsOPT->getInterfaceDecl()) { 4078 for (ObjCObjectPointerType::qual_iterator I = rhsQID->qual_begin(), 4079 E = rhsQID->qual_end(); I != E; ++I) { 4080 // when comparing an id<P> on lhs with a static type on rhs, 4081 // see if static class implements all of id's protocols, directly or 4082 // through its super class and categories. 4083 if (lhsID->ClassImplementsProtocol(*I, true)) { 4084 match = true; 4085 break; 4086 } 4087 } 4088 if (!match) 4089 return false; 4090 } 4091 return true; 4092 } 4093 // Both the right and left sides have qualifiers. 4094 for (ObjCObjectPointerType::qual_iterator I = lhsOPT->qual_begin(), 4095 E = lhsOPT->qual_end(); I != E; ++I) { 4096 ObjCProtocolDecl *lhsProto = *I; 4097 bool match = false; 4098 4099 // when comparing an id<P> on lhs with a static type on rhs, 4100 // see if static class implements all of id's protocols, directly or 4101 // through its super class and categories. 4102 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 4103 E = rhsQID->qual_end(); J != E; ++J) { 4104 ObjCProtocolDecl *rhsProto = *J; 4105 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4106 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4107 match = true; 4108 break; 4109 } 4110 } 4111 if (!match) 4112 return false; 4113 } 4114 return true; 4115 } 4116 return false; 4117} 4118 4119/// canAssignObjCInterfaces - Return true if the two interface types are 4120/// compatible for assignment from RHS to LHS. This handles validation of any 4121/// protocol qualifiers on the LHS or RHS. 4122/// 4123bool ASTContext::canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 4124 const ObjCObjectPointerType *RHSOPT) { 4125 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 4126 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 4127 4128 // If either type represents the built-in 'id' or 'Class' types, return true. 4129 if (LHS->isObjCUnqualifiedIdOrClass() || 4130 RHS->isObjCUnqualifiedIdOrClass()) 4131 return true; 4132 4133 if (LHS->isObjCQualifiedId() || RHS->isObjCQualifiedId()) 4134 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4135 QualType(RHSOPT,0), 4136 false); 4137 4138 // If we have 2 user-defined types, fall into that path. 4139 if (LHS->getInterface() && RHS->getInterface()) 4140 return canAssignObjCInterfaces(LHS, RHS); 4141 4142 return false; 4143} 4144 4145/// canAssignObjCInterfacesInBlockPointer - This routine is specifically written 4146/// for providing type-safty for objective-c pointers used to pass/return 4147/// arguments in block literals. When passed as arguments, passing 'A*' where 4148/// 'id' is expected is not OK. Passing 'Sub *" where 'Super *" is expected is 4149/// not OK. For the return type, the opposite is not OK. 4150bool ASTContext::canAssignObjCInterfacesInBlockPointer( 4151 const ObjCObjectPointerType *LHSOPT, 4152 const ObjCObjectPointerType *RHSOPT) { 4153 if (RHSOPT->isObjCBuiltinType() || LHSOPT->isObjCIdType()) 4154 return true; 4155 4156 if (LHSOPT->isObjCBuiltinType()) { 4157 return RHSOPT->isObjCBuiltinType() || RHSOPT->isObjCQualifiedIdType(); 4158 } 4159 4160 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 4161 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4162 QualType(RHSOPT,0), 4163 false); 4164 4165 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4166 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4167 if (LHS && RHS) { // We have 2 user-defined types. 4168 if (LHS != RHS) { 4169 if (LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 4170 return false; 4171 if (RHS->getDecl()->isSuperClassOf(LHS->getDecl())) 4172 return true; 4173 } 4174 else 4175 return true; 4176 } 4177 return false; 4178} 4179 4180/// getIntersectionOfProtocols - This routine finds the intersection of set 4181/// of protocols inherited from two distinct objective-c pointer objects. 4182/// It is used to build composite qualifier list of the composite type of 4183/// the conditional expression involving two objective-c pointer objects. 4184static 4185void getIntersectionOfProtocols(ASTContext &Context, 4186 const ObjCObjectPointerType *LHSOPT, 4187 const ObjCObjectPointerType *RHSOPT, 4188 llvm::SmallVectorImpl<ObjCProtocolDecl *> &IntersectionOfProtocols) { 4189 4190 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 4191 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 4192 assert(LHS->getInterface() && "LHS must have an interface base"); 4193 assert(RHS->getInterface() && "RHS must have an interface base"); 4194 4195 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> InheritedProtocolSet; 4196 unsigned LHSNumProtocols = LHS->getNumProtocols(); 4197 if (LHSNumProtocols > 0) 4198 InheritedProtocolSet.insert(LHS->qual_begin(), LHS->qual_end()); 4199 else { 4200 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 4201 Context.CollectInheritedProtocols(LHS->getInterface(), 4202 LHSInheritedProtocols); 4203 InheritedProtocolSet.insert(LHSInheritedProtocols.begin(), 4204 LHSInheritedProtocols.end()); 4205 } 4206 4207 unsigned RHSNumProtocols = RHS->getNumProtocols(); 4208 if (RHSNumProtocols > 0) { 4209 ObjCProtocolDecl **RHSProtocols = 4210 const_cast<ObjCProtocolDecl **>(RHS->qual_begin()); 4211 for (unsigned i = 0; i < RHSNumProtocols; ++i) 4212 if (InheritedProtocolSet.count(RHSProtocols[i])) 4213 IntersectionOfProtocols.push_back(RHSProtocols[i]); 4214 } 4215 else { 4216 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> RHSInheritedProtocols; 4217 Context.CollectInheritedProtocols(RHS->getInterface(), 4218 RHSInheritedProtocols); 4219 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 4220 RHSInheritedProtocols.begin(), 4221 E = RHSInheritedProtocols.end(); I != E; ++I) 4222 if (InheritedProtocolSet.count((*I))) 4223 IntersectionOfProtocols.push_back((*I)); 4224 } 4225} 4226 4227/// areCommonBaseCompatible - Returns common base class of the two classes if 4228/// one found. Note that this is O'2 algorithm. But it will be called as the 4229/// last type comparison in a ?-exp of ObjC pointer types before a 4230/// warning is issued. So, its invokation is extremely rare. 4231QualType ASTContext::areCommonBaseCompatible( 4232 const ObjCObjectPointerType *Lptr, 4233 const ObjCObjectPointerType *Rptr) { 4234 const ObjCObjectType *LHS = Lptr->getObjectType(); 4235 const ObjCObjectType *RHS = Rptr->getObjectType(); 4236 const ObjCInterfaceDecl* LDecl = LHS->getInterface(); 4237 const ObjCInterfaceDecl* RDecl = RHS->getInterface(); 4238 if (!LDecl || !RDecl) 4239 return QualType(); 4240 4241 while ((LDecl = LDecl->getSuperClass())) { 4242 LHS = cast<ObjCInterfaceType>(getObjCInterfaceType(LDecl)); 4243 if (canAssignObjCInterfaces(LHS, RHS)) { 4244 llvm::SmallVector<ObjCProtocolDecl *, 8> Protocols; 4245 getIntersectionOfProtocols(*this, Lptr, Rptr, Protocols); 4246 4247 QualType Result = QualType(LHS, 0); 4248 if (!Protocols.empty()) 4249 Result = getObjCObjectType(Result, Protocols.data(), Protocols.size()); 4250 Result = getObjCObjectPointerType(Result); 4251 return Result; 4252 } 4253 } 4254 4255 return QualType(); 4256} 4257 4258bool ASTContext::canAssignObjCInterfaces(const ObjCObjectType *LHS, 4259 const ObjCObjectType *RHS) { 4260 assert(LHS->getInterface() && "LHS is not an interface type"); 4261 assert(RHS->getInterface() && "RHS is not an interface type"); 4262 4263 // Verify that the base decls are compatible: the RHS must be a subclass of 4264 // the LHS. 4265 if (!LHS->getInterface()->isSuperClassOf(RHS->getInterface())) 4266 return false; 4267 4268 // RHS must have a superset of the protocols in the LHS. If the LHS is not 4269 // protocol qualified at all, then we are good. 4270 if (LHS->getNumProtocols() == 0) 4271 return true; 4272 4273 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, then it 4274 // isn't a superset. 4275 if (RHS->getNumProtocols() == 0) 4276 return true; // FIXME: should return false! 4277 4278 for (ObjCObjectType::qual_iterator LHSPI = LHS->qual_begin(), 4279 LHSPE = LHS->qual_end(); 4280 LHSPI != LHSPE; LHSPI++) { 4281 bool RHSImplementsProtocol = false; 4282 4283 // If the RHS doesn't implement the protocol on the left, the types 4284 // are incompatible. 4285 for (ObjCObjectType::qual_iterator RHSPI = RHS->qual_begin(), 4286 RHSPE = RHS->qual_end(); 4287 RHSPI != RHSPE; RHSPI++) { 4288 if ((*RHSPI)->lookupProtocolNamed((*LHSPI)->getIdentifier())) { 4289 RHSImplementsProtocol = true; 4290 break; 4291 } 4292 } 4293 // FIXME: For better diagnostics, consider passing back the protocol name. 4294 if (!RHSImplementsProtocol) 4295 return false; 4296 } 4297 // The RHS implements all protocols listed on the LHS. 4298 return true; 4299} 4300 4301bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) { 4302 // get the "pointed to" types 4303 const ObjCObjectPointerType *LHSOPT = LHS->getAs<ObjCObjectPointerType>(); 4304 const ObjCObjectPointerType *RHSOPT = RHS->getAs<ObjCObjectPointerType>(); 4305 4306 if (!LHSOPT || !RHSOPT) 4307 return false; 4308 4309 return canAssignObjCInterfaces(LHSOPT, RHSOPT) || 4310 canAssignObjCInterfaces(RHSOPT, LHSOPT); 4311} 4312 4313/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible, 4314/// both shall have the identically qualified version of a compatible type. 4315/// C99 6.2.7p1: Two types have compatible types if their types are the 4316/// same. See 6.7.[2,3,5] for additional rules. 4317bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS) { 4318 if (getLangOptions().CPlusPlus) 4319 return hasSameType(LHS, RHS); 4320 4321 return !mergeTypes(LHS, RHS).isNull(); 4322} 4323 4324bool ASTContext::typesAreBlockPointerCompatible(QualType LHS, QualType RHS) { 4325 return !mergeTypes(LHS, RHS, true).isNull(); 4326} 4327 4328QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs, 4329 bool OfBlockPointer) { 4330 const FunctionType *lbase = lhs->getAs<FunctionType>(); 4331 const FunctionType *rbase = rhs->getAs<FunctionType>(); 4332 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 4333 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 4334 bool allLTypes = true; 4335 bool allRTypes = true; 4336 4337 // Check return type 4338 QualType retType; 4339 if (OfBlockPointer) 4340 retType = mergeTypes(rbase->getResultType(), lbase->getResultType(), true); 4341 else 4342 retType = mergeTypes(lbase->getResultType(), rbase->getResultType()); 4343 if (retType.isNull()) return QualType(); 4344 if (getCanonicalType(retType) != getCanonicalType(lbase->getResultType())) 4345 allLTypes = false; 4346 if (getCanonicalType(retType) != getCanonicalType(rbase->getResultType())) 4347 allRTypes = false; 4348 // FIXME: double check this 4349 // FIXME: should we error if lbase->getRegParmAttr() != 0 && 4350 // rbase->getRegParmAttr() != 0 && 4351 // lbase->getRegParmAttr() != rbase->getRegParmAttr()? 4352 FunctionType::ExtInfo lbaseInfo = lbase->getExtInfo(); 4353 FunctionType::ExtInfo rbaseInfo = rbase->getExtInfo(); 4354 unsigned RegParm = lbaseInfo.getRegParm() == 0 ? rbaseInfo.getRegParm() : 4355 lbaseInfo.getRegParm(); 4356 bool NoReturn = lbaseInfo.getNoReturn() || rbaseInfo.getNoReturn(); 4357 if (NoReturn != lbaseInfo.getNoReturn() || 4358 RegParm != lbaseInfo.getRegParm()) 4359 allLTypes = false; 4360 if (NoReturn != rbaseInfo.getNoReturn() || 4361 RegParm != rbaseInfo.getRegParm()) 4362 allRTypes = false; 4363 CallingConv lcc = lbaseInfo.getCC(); 4364 CallingConv rcc = rbaseInfo.getCC(); 4365 // Compatible functions must have compatible calling conventions 4366 if (!isSameCallConv(lcc, rcc)) 4367 return QualType(); 4368 4369 if (lproto && rproto) { // two C99 style function prototypes 4370 assert(!lproto->hasExceptionSpec() && !rproto->hasExceptionSpec() && 4371 "C++ shouldn't be here"); 4372 unsigned lproto_nargs = lproto->getNumArgs(); 4373 unsigned rproto_nargs = rproto->getNumArgs(); 4374 4375 // Compatible functions must have the same number of arguments 4376 if (lproto_nargs != rproto_nargs) 4377 return QualType(); 4378 4379 // Variadic and non-variadic functions aren't compatible 4380 if (lproto->isVariadic() != rproto->isVariadic()) 4381 return QualType(); 4382 4383 if (lproto->getTypeQuals() != rproto->getTypeQuals()) 4384 return QualType(); 4385 4386 // Check argument compatibility 4387 llvm::SmallVector<QualType, 10> types; 4388 for (unsigned i = 0; i < lproto_nargs; i++) { 4389 QualType largtype = lproto->getArgType(i).getUnqualifiedType(); 4390 QualType rargtype = rproto->getArgType(i).getUnqualifiedType(); 4391 QualType argtype = mergeTypes(largtype, rargtype, OfBlockPointer); 4392 if (argtype.isNull()) return QualType(); 4393 types.push_back(argtype); 4394 if (getCanonicalType(argtype) != getCanonicalType(largtype)) 4395 allLTypes = false; 4396 if (getCanonicalType(argtype) != getCanonicalType(rargtype)) 4397 allRTypes = false; 4398 } 4399 if (allLTypes) return lhs; 4400 if (allRTypes) return rhs; 4401 return getFunctionType(retType, types.begin(), types.size(), 4402 lproto->isVariadic(), lproto->getTypeQuals(), 4403 false, false, 0, 0, 4404 FunctionType::ExtInfo(NoReturn, RegParm, lcc)); 4405 } 4406 4407 if (lproto) allRTypes = false; 4408 if (rproto) allLTypes = false; 4409 4410 const FunctionProtoType *proto = lproto ? lproto : rproto; 4411 if (proto) { 4412 assert(!proto->hasExceptionSpec() && "C++ shouldn't be here"); 4413 if (proto->isVariadic()) return QualType(); 4414 // Check that the types are compatible with the types that 4415 // would result from default argument promotions (C99 6.7.5.3p15). 4416 // The only types actually affected are promotable integer 4417 // types and floats, which would be passed as a different 4418 // type depending on whether the prototype is visible. 4419 unsigned proto_nargs = proto->getNumArgs(); 4420 for (unsigned i = 0; i < proto_nargs; ++i) { 4421 QualType argTy = proto->getArgType(i); 4422 4423 // Look at the promotion type of enum types, since that is the type used 4424 // to pass enum values. 4425 if (const EnumType *Enum = argTy->getAs<EnumType>()) 4426 argTy = Enum->getDecl()->getPromotionType(); 4427 4428 if (argTy->isPromotableIntegerType() || 4429 getCanonicalType(argTy).getUnqualifiedType() == FloatTy) 4430 return QualType(); 4431 } 4432 4433 if (allLTypes) return lhs; 4434 if (allRTypes) return rhs; 4435 return getFunctionType(retType, proto->arg_type_begin(), 4436 proto->getNumArgs(), proto->isVariadic(), 4437 proto->getTypeQuals(), 4438 false, false, 0, 0, 4439 FunctionType::ExtInfo(NoReturn, RegParm, lcc)); 4440 } 4441 4442 if (allLTypes) return lhs; 4443 if (allRTypes) return rhs; 4444 FunctionType::ExtInfo Info(NoReturn, RegParm, lcc); 4445 return getFunctionNoProtoType(retType, Info); 4446} 4447 4448QualType ASTContext::mergeTypes(QualType LHS, QualType RHS, 4449 bool OfBlockPointer) { 4450 // C++ [expr]: If an expression initially has the type "reference to T", the 4451 // type is adjusted to "T" prior to any further analysis, the expression 4452 // designates the object or function denoted by the reference, and the 4453 // expression is an lvalue unless the reference is an rvalue reference and 4454 // the expression is a function call (possibly inside parentheses). 4455 assert(!LHS->getAs<ReferenceType>() && "LHS is a reference type?"); 4456 assert(!RHS->getAs<ReferenceType>() && "RHS is a reference type?"); 4457 4458 QualType LHSCan = getCanonicalType(LHS), 4459 RHSCan = getCanonicalType(RHS); 4460 4461 // If two types are identical, they are compatible. 4462 if (LHSCan == RHSCan) 4463 return LHS; 4464 4465 // If the qualifiers are different, the types aren't compatible... mostly. 4466 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 4467 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 4468 if (LQuals != RQuals) { 4469 // If any of these qualifiers are different, we have a type 4470 // mismatch. 4471 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 4472 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 4473 return QualType(); 4474 4475 // Exactly one GC qualifier difference is allowed: __strong is 4476 // okay if the other type has no GC qualifier but is an Objective 4477 // C object pointer (i.e. implicitly strong by default). We fix 4478 // this by pretending that the unqualified type was actually 4479 // qualified __strong. 4480 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 4481 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 4482 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 4483 4484 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 4485 return QualType(); 4486 4487 if (GC_L == Qualifiers::Strong && RHSCan->isObjCObjectPointerType()) { 4488 return mergeTypes(LHS, getObjCGCQualType(RHS, Qualifiers::Strong)); 4489 } 4490 if (GC_R == Qualifiers::Strong && LHSCan->isObjCObjectPointerType()) { 4491 return mergeTypes(getObjCGCQualType(LHS, Qualifiers::Strong), RHS); 4492 } 4493 return QualType(); 4494 } 4495 4496 // Okay, qualifiers are equal. 4497 4498 Type::TypeClass LHSClass = LHSCan->getTypeClass(); 4499 Type::TypeClass RHSClass = RHSCan->getTypeClass(); 4500 4501 // We want to consider the two function types to be the same for these 4502 // comparisons, just force one to the other. 4503 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto; 4504 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto; 4505 4506 // Same as above for arrays 4507 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray) 4508 LHSClass = Type::ConstantArray; 4509 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray) 4510 RHSClass = Type::ConstantArray; 4511 4512 // ObjCInterfaces are just specialized ObjCObjects. 4513 if (LHSClass == Type::ObjCInterface) LHSClass = Type::ObjCObject; 4514 if (RHSClass == Type::ObjCInterface) RHSClass = Type::ObjCObject; 4515 4516 // Canonicalize ExtVector -> Vector. 4517 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector; 4518 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector; 4519 4520 // If the canonical type classes don't match. 4521 if (LHSClass != RHSClass) { 4522 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char, 4523 // a signed integer type, or an unsigned integer type. 4524 // Compatibility is based on the underlying type, not the promotion 4525 // type. 4526 if (const EnumType* ETy = LHS->getAs<EnumType>()) { 4527 if (ETy->getDecl()->getIntegerType() == RHSCan.getUnqualifiedType()) 4528 return RHS; 4529 } 4530 if (const EnumType* ETy = RHS->getAs<EnumType>()) { 4531 if (ETy->getDecl()->getIntegerType() == LHSCan.getUnqualifiedType()) 4532 return LHS; 4533 } 4534 4535 return QualType(); 4536 } 4537 4538 // The canonical type classes match. 4539 switch (LHSClass) { 4540#define TYPE(Class, Base) 4541#define ABSTRACT_TYPE(Class, Base) 4542#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) case Type::Class: 4543#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 4544#define DEPENDENT_TYPE(Class, Base) case Type::Class: 4545#include "clang/AST/TypeNodes.def" 4546 assert(false && "Non-canonical and dependent types shouldn't get here"); 4547 return QualType(); 4548 4549 case Type::LValueReference: 4550 case Type::RValueReference: 4551 case Type::MemberPointer: 4552 assert(false && "C++ should never be in mergeTypes"); 4553 return QualType(); 4554 4555 case Type::ObjCInterface: 4556 case Type::IncompleteArray: 4557 case Type::VariableArray: 4558 case Type::FunctionProto: 4559 case Type::ExtVector: 4560 assert(false && "Types are eliminated above"); 4561 return QualType(); 4562 4563 case Type::Pointer: 4564 { 4565 // Merge two pointer types, while trying to preserve typedef info 4566 QualType LHSPointee = LHS->getAs<PointerType>()->getPointeeType(); 4567 QualType RHSPointee = RHS->getAs<PointerType>()->getPointeeType(); 4568 QualType ResultType = mergeTypes(LHSPointee, RHSPointee); 4569 if (ResultType.isNull()) return QualType(); 4570 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 4571 return LHS; 4572 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 4573 return RHS; 4574 return getPointerType(ResultType); 4575 } 4576 case Type::BlockPointer: 4577 { 4578 // Merge two block pointer types, while trying to preserve typedef info 4579 QualType LHSPointee = LHS->getAs<BlockPointerType>()->getPointeeType(); 4580 QualType RHSPointee = RHS->getAs<BlockPointerType>()->getPointeeType(); 4581 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, OfBlockPointer); 4582 if (ResultType.isNull()) return QualType(); 4583 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 4584 return LHS; 4585 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 4586 return RHS; 4587 return getBlockPointerType(ResultType); 4588 } 4589 case Type::ConstantArray: 4590 { 4591 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS); 4592 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS); 4593 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize()) 4594 return QualType(); 4595 4596 QualType LHSElem = getAsArrayType(LHS)->getElementType(); 4597 QualType RHSElem = getAsArrayType(RHS)->getElementType(); 4598 QualType ResultType = mergeTypes(LHSElem, RHSElem); 4599 if (ResultType.isNull()) return QualType(); 4600 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 4601 return LHS; 4602 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 4603 return RHS; 4604 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(), 4605 ArrayType::ArraySizeModifier(), 0); 4606 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(), 4607 ArrayType::ArraySizeModifier(), 0); 4608 const VariableArrayType* LVAT = getAsVariableArrayType(LHS); 4609 const VariableArrayType* RVAT = getAsVariableArrayType(RHS); 4610 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 4611 return LHS; 4612 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 4613 return RHS; 4614 if (LVAT) { 4615 // FIXME: This isn't correct! But tricky to implement because 4616 // the array's size has to be the size of LHS, but the type 4617 // has to be different. 4618 return LHS; 4619 } 4620 if (RVAT) { 4621 // FIXME: This isn't correct! But tricky to implement because 4622 // the array's size has to be the size of RHS, but the type 4623 // has to be different. 4624 return RHS; 4625 } 4626 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS; 4627 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS; 4628 return getIncompleteArrayType(ResultType, 4629 ArrayType::ArraySizeModifier(), 0); 4630 } 4631 case Type::FunctionNoProto: 4632 return mergeFunctionTypes(LHS, RHS, OfBlockPointer); 4633 case Type::Record: 4634 case Type::Enum: 4635 return QualType(); 4636 case Type::Builtin: 4637 // Only exactly equal builtin types are compatible, which is tested above. 4638 return QualType(); 4639 case Type::Complex: 4640 // Distinct complex types are incompatible. 4641 return QualType(); 4642 case Type::Vector: 4643 // FIXME: The merged type should be an ExtVector! 4644 if (areCompatVectorTypes(LHSCan->getAs<VectorType>(), 4645 RHSCan->getAs<VectorType>())) 4646 return LHS; 4647 return QualType(); 4648 case Type::ObjCObject: { 4649 // Check if the types are assignment compatible. 4650 // FIXME: This should be type compatibility, e.g. whether 4651 // "LHS x; RHS x;" at global scope is legal. 4652 const ObjCObjectType* LHSIface = LHS->getAs<ObjCObjectType>(); 4653 const ObjCObjectType* RHSIface = RHS->getAs<ObjCObjectType>(); 4654 if (canAssignObjCInterfaces(LHSIface, RHSIface)) 4655 return LHS; 4656 4657 return QualType(); 4658 } 4659 case Type::ObjCObjectPointer: { 4660 if (OfBlockPointer) { 4661 if (canAssignObjCInterfacesInBlockPointer( 4662 LHS->getAs<ObjCObjectPointerType>(), 4663 RHS->getAs<ObjCObjectPointerType>())) 4664 return LHS; 4665 return QualType(); 4666 } 4667 if (canAssignObjCInterfaces(LHS->getAs<ObjCObjectPointerType>(), 4668 RHS->getAs<ObjCObjectPointerType>())) 4669 return LHS; 4670 4671 return QualType(); 4672 } 4673 } 4674 4675 return QualType(); 4676} 4677 4678/// mergeObjCGCQualifiers - This routine merges ObjC's GC attribute of 'LHS' and 4679/// 'RHS' attributes and returns the merged version; including for function 4680/// return types. 4681QualType ASTContext::mergeObjCGCQualifiers(QualType LHS, QualType RHS) { 4682 QualType LHSCan = getCanonicalType(LHS), 4683 RHSCan = getCanonicalType(RHS); 4684 // If two types are identical, they are compatible. 4685 if (LHSCan == RHSCan) 4686 return LHS; 4687 if (RHSCan->isFunctionType()) { 4688 if (!LHSCan->isFunctionType()) 4689 return QualType(); 4690 QualType OldReturnType = 4691 cast<FunctionType>(RHSCan.getTypePtr())->getResultType(); 4692 QualType NewReturnType = 4693 cast<FunctionType>(LHSCan.getTypePtr())->getResultType(); 4694 QualType ResReturnType = 4695 mergeObjCGCQualifiers(NewReturnType, OldReturnType); 4696 if (ResReturnType.isNull()) 4697 return QualType(); 4698 if (ResReturnType == NewReturnType || ResReturnType == OldReturnType) { 4699 // id foo(); ... __strong id foo(); or: __strong id foo(); ... id foo(); 4700 // In either case, use OldReturnType to build the new function type. 4701 const FunctionType *F = LHS->getAs<FunctionType>(); 4702 if (const FunctionProtoType *FPT = cast<FunctionProtoType>(F)) { 4703 FunctionType::ExtInfo Info = getFunctionExtInfo(LHS); 4704 QualType ResultType 4705 = getFunctionType(OldReturnType, FPT->arg_type_begin(), 4706 FPT->getNumArgs(), FPT->isVariadic(), 4707 FPT->getTypeQuals(), 4708 FPT->hasExceptionSpec(), 4709 FPT->hasAnyExceptionSpec(), 4710 FPT->getNumExceptions(), 4711 FPT->exception_begin(), 4712 Info); 4713 return ResultType; 4714 } 4715 } 4716 return QualType(); 4717 } 4718 4719 // If the qualifiers are different, the types can still be merged. 4720 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 4721 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 4722 if (LQuals != RQuals) { 4723 // If any of these qualifiers are different, we have a type mismatch. 4724 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 4725 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 4726 return QualType(); 4727 4728 // Exactly one GC qualifier difference is allowed: __strong is 4729 // okay if the other type has no GC qualifier but is an Objective 4730 // C object pointer (i.e. implicitly strong by default). We fix 4731 // this by pretending that the unqualified type was actually 4732 // qualified __strong. 4733 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 4734 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 4735 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 4736 4737 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 4738 return QualType(); 4739 4740 if (GC_L == Qualifiers::Strong) 4741 return LHS; 4742 if (GC_R == Qualifiers::Strong) 4743 return RHS; 4744 return QualType(); 4745 } 4746 4747 if (LHSCan->isObjCObjectPointerType() && RHSCan->isObjCObjectPointerType()) { 4748 QualType LHSBaseQT = LHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 4749 QualType RHSBaseQT = RHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 4750 QualType ResQT = mergeObjCGCQualifiers(LHSBaseQT, RHSBaseQT); 4751 if (ResQT == LHSBaseQT) 4752 return LHS; 4753 if (ResQT == RHSBaseQT) 4754 return RHS; 4755 } 4756 return QualType(); 4757} 4758 4759//===----------------------------------------------------------------------===// 4760// Integer Predicates 4761//===----------------------------------------------------------------------===// 4762 4763unsigned ASTContext::getIntWidth(QualType T) { 4764 if (T->isBooleanType()) 4765 return 1; 4766 if (EnumType *ET = dyn_cast<EnumType>(T)) 4767 T = ET->getDecl()->getIntegerType(); 4768 // For builtin types, just use the standard type sizing method 4769 return (unsigned)getTypeSize(T); 4770} 4771 4772QualType ASTContext::getCorrespondingUnsignedType(QualType T) { 4773 assert(T->isSignedIntegerType() && "Unexpected type"); 4774 4775 // Turn <4 x signed int> -> <4 x unsigned int> 4776 if (const VectorType *VTy = T->getAs<VectorType>()) 4777 return getVectorType(getCorrespondingUnsignedType(VTy->getElementType()), 4778 VTy->getNumElements(), VTy->isAltiVec(), VTy->isPixel()); 4779 4780 // For enums, we return the unsigned version of the base type. 4781 if (const EnumType *ETy = T->getAs<EnumType>()) 4782 T = ETy->getDecl()->getIntegerType(); 4783 4784 const BuiltinType *BTy = T->getAs<BuiltinType>(); 4785 assert(BTy && "Unexpected signed integer type"); 4786 switch (BTy->getKind()) { 4787 case BuiltinType::Char_S: 4788 case BuiltinType::SChar: 4789 return UnsignedCharTy; 4790 case BuiltinType::Short: 4791 return UnsignedShortTy; 4792 case BuiltinType::Int: 4793 return UnsignedIntTy; 4794 case BuiltinType::Long: 4795 return UnsignedLongTy; 4796 case BuiltinType::LongLong: 4797 return UnsignedLongLongTy; 4798 case BuiltinType::Int128: 4799 return UnsignedInt128Ty; 4800 default: 4801 assert(0 && "Unexpected signed integer type"); 4802 return QualType(); 4803 } 4804} 4805 4806ExternalASTSource::~ExternalASTSource() { } 4807 4808void ExternalASTSource::PrintStats() { } 4809 4810 4811//===----------------------------------------------------------------------===// 4812// Builtin Type Computation 4813//===----------------------------------------------------------------------===// 4814 4815/// DecodeTypeFromStr - This decodes one type descriptor from Str, advancing the 4816/// pointer over the consumed characters. This returns the resultant type. 4817static QualType DecodeTypeFromStr(const char *&Str, ASTContext &Context, 4818 ASTContext::GetBuiltinTypeError &Error, 4819 bool AllowTypeModifiers = true) { 4820 // Modifiers. 4821 int HowLong = 0; 4822 bool Signed = false, Unsigned = false; 4823 4824 // Read the modifiers first. 4825 bool Done = false; 4826 while (!Done) { 4827 switch (*Str++) { 4828 default: Done = true; --Str; break; 4829 case 'S': 4830 assert(!Unsigned && "Can't use both 'S' and 'U' modifiers!"); 4831 assert(!Signed && "Can't use 'S' modifier multiple times!"); 4832 Signed = true; 4833 break; 4834 case 'U': 4835 assert(!Signed && "Can't use both 'S' and 'U' modifiers!"); 4836 assert(!Unsigned && "Can't use 'S' modifier multiple times!"); 4837 Unsigned = true; 4838 break; 4839 case 'L': 4840 assert(HowLong <= 2 && "Can't have LLLL modifier"); 4841 ++HowLong; 4842 break; 4843 } 4844 } 4845 4846 QualType Type; 4847 4848 // Read the base type. 4849 switch (*Str++) { 4850 default: assert(0 && "Unknown builtin type letter!"); 4851 case 'v': 4852 assert(HowLong == 0 && !Signed && !Unsigned && 4853 "Bad modifiers used with 'v'!"); 4854 Type = Context.VoidTy; 4855 break; 4856 case 'f': 4857 assert(HowLong == 0 && !Signed && !Unsigned && 4858 "Bad modifiers used with 'f'!"); 4859 Type = Context.FloatTy; 4860 break; 4861 case 'd': 4862 assert(HowLong < 2 && !Signed && !Unsigned && 4863 "Bad modifiers used with 'd'!"); 4864 if (HowLong) 4865 Type = Context.LongDoubleTy; 4866 else 4867 Type = Context.DoubleTy; 4868 break; 4869 case 's': 4870 assert(HowLong == 0 && "Bad modifiers used with 's'!"); 4871 if (Unsigned) 4872 Type = Context.UnsignedShortTy; 4873 else 4874 Type = Context.ShortTy; 4875 break; 4876 case 'i': 4877 if (HowLong == 3) 4878 Type = Unsigned ? Context.UnsignedInt128Ty : Context.Int128Ty; 4879 else if (HowLong == 2) 4880 Type = Unsigned ? Context.UnsignedLongLongTy : Context.LongLongTy; 4881 else if (HowLong == 1) 4882 Type = Unsigned ? Context.UnsignedLongTy : Context.LongTy; 4883 else 4884 Type = Unsigned ? Context.UnsignedIntTy : Context.IntTy; 4885 break; 4886 case 'c': 4887 assert(HowLong == 0 && "Bad modifiers used with 'c'!"); 4888 if (Signed) 4889 Type = Context.SignedCharTy; 4890 else if (Unsigned) 4891 Type = Context.UnsignedCharTy; 4892 else 4893 Type = Context.CharTy; 4894 break; 4895 case 'b': // boolean 4896 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'b'!"); 4897 Type = Context.BoolTy; 4898 break; 4899 case 'z': // size_t. 4900 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'z'!"); 4901 Type = Context.getSizeType(); 4902 break; 4903 case 'F': 4904 Type = Context.getCFConstantStringType(); 4905 break; 4906 case 'a': 4907 Type = Context.getBuiltinVaListType(); 4908 assert(!Type.isNull() && "builtin va list type not initialized!"); 4909 break; 4910 case 'A': 4911 // This is a "reference" to a va_list; however, what exactly 4912 // this means depends on how va_list is defined. There are two 4913 // different kinds of va_list: ones passed by value, and ones 4914 // passed by reference. An example of a by-value va_list is 4915 // x86, where va_list is a char*. An example of by-ref va_list 4916 // is x86-64, where va_list is a __va_list_tag[1]. For x86, 4917 // we want this argument to be a char*&; for x86-64, we want 4918 // it to be a __va_list_tag*. 4919 Type = Context.getBuiltinVaListType(); 4920 assert(!Type.isNull() && "builtin va list type not initialized!"); 4921 if (Type->isArrayType()) { 4922 Type = Context.getArrayDecayedType(Type); 4923 } else { 4924 Type = Context.getLValueReferenceType(Type); 4925 } 4926 break; 4927 case 'V': { 4928 char *End; 4929 unsigned NumElements = strtoul(Str, &End, 10); 4930 assert(End != Str && "Missing vector size"); 4931 4932 Str = End; 4933 4934 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 4935 // FIXME: Don't know what to do about AltiVec. 4936 Type = Context.getVectorType(ElementType, NumElements, false, false); 4937 break; 4938 } 4939 case 'X': { 4940 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 4941 Type = Context.getComplexType(ElementType); 4942 break; 4943 } 4944 case 'P': 4945 Type = Context.getFILEType(); 4946 if (Type.isNull()) { 4947 Error = ASTContext::GE_Missing_stdio; 4948 return QualType(); 4949 } 4950 break; 4951 case 'J': 4952 if (Signed) 4953 Type = Context.getsigjmp_bufType(); 4954 else 4955 Type = Context.getjmp_bufType(); 4956 4957 if (Type.isNull()) { 4958 Error = ASTContext::GE_Missing_setjmp; 4959 return QualType(); 4960 } 4961 break; 4962 } 4963 4964 if (!AllowTypeModifiers) 4965 return Type; 4966 4967 Done = false; 4968 while (!Done) { 4969 switch (char c = *Str++) { 4970 default: Done = true; --Str; break; 4971 case '*': 4972 case '&': 4973 { 4974 // Both pointers and references can have their pointee types 4975 // qualified with an address space. 4976 char *End; 4977 unsigned AddrSpace = strtoul(Str, &End, 10); 4978 if (End != Str && AddrSpace != 0) { 4979 Type = Context.getAddrSpaceQualType(Type, AddrSpace); 4980 Str = End; 4981 } 4982 } 4983 if (c == '*') 4984 Type = Context.getPointerType(Type); 4985 else 4986 Type = Context.getLValueReferenceType(Type); 4987 break; 4988 // FIXME: There's no way to have a built-in with an rvalue ref arg. 4989 case 'C': 4990 Type = Type.withConst(); 4991 break; 4992 case 'D': 4993 Type = Context.getVolatileType(Type); 4994 break; 4995 } 4996 } 4997 4998 return Type; 4999} 5000 5001/// GetBuiltinType - Return the type for the specified builtin. 5002QualType ASTContext::GetBuiltinType(unsigned id, 5003 GetBuiltinTypeError &Error) { 5004 const char *TypeStr = BuiltinInfo.GetTypeString(id); 5005 5006 llvm::SmallVector<QualType, 8> ArgTypes; 5007 5008 Error = GE_None; 5009 QualType ResType = DecodeTypeFromStr(TypeStr, *this, Error); 5010 if (Error != GE_None) 5011 return QualType(); 5012 while (TypeStr[0] && TypeStr[0] != '.') { 5013 QualType Ty = DecodeTypeFromStr(TypeStr, *this, Error); 5014 if (Error != GE_None) 5015 return QualType(); 5016 5017 // Do array -> pointer decay. The builtin should use the decayed type. 5018 if (Ty->isArrayType()) 5019 Ty = getArrayDecayedType(Ty); 5020 5021 ArgTypes.push_back(Ty); 5022 } 5023 5024 assert((TypeStr[0] != '.' || TypeStr[1] == 0) && 5025 "'.' should only occur at end of builtin type list!"); 5026 5027 // handle untyped/variadic arguments "T c99Style();" or "T cppStyle(...);". 5028 if (ArgTypes.size() == 0 && TypeStr[0] == '.') 5029 return getFunctionNoProtoType(ResType); 5030 5031 // FIXME: Should we create noreturn types? 5032 return getFunctionType(ResType, ArgTypes.data(), ArgTypes.size(), 5033 TypeStr[0] == '.', 0, false, false, 0, 0, 5034 FunctionType::ExtInfo()); 5035} 5036 5037QualType 5038ASTContext::UsualArithmeticConversionsType(QualType lhs, QualType rhs) { 5039 // Perform the usual unary conversions. We do this early so that 5040 // integral promotions to "int" can allow us to exit early, in the 5041 // lhs == rhs check. Also, for conversion purposes, we ignore any 5042 // qualifiers. For example, "const float" and "float" are 5043 // equivalent. 5044 if (lhs->isPromotableIntegerType()) 5045 lhs = getPromotedIntegerType(lhs); 5046 else 5047 lhs = lhs.getUnqualifiedType(); 5048 if (rhs->isPromotableIntegerType()) 5049 rhs = getPromotedIntegerType(rhs); 5050 else 5051 rhs = rhs.getUnqualifiedType(); 5052 5053 // If both types are identical, no conversion is needed. 5054 if (lhs == rhs) 5055 return lhs; 5056 5057 // If either side is a non-arithmetic type (e.g. a pointer), we are done. 5058 // The caller can deal with this (e.g. pointer + int). 5059 if (!lhs->isArithmeticType() || !rhs->isArithmeticType()) 5060 return lhs; 5061 5062 // At this point, we have two different arithmetic types. 5063 5064 // Handle complex types first (C99 6.3.1.8p1). 5065 if (lhs->isComplexType() || rhs->isComplexType()) { 5066 // if we have an integer operand, the result is the complex type. 5067 if (rhs->isIntegerType() || rhs->isComplexIntegerType()) { 5068 // convert the rhs to the lhs complex type. 5069 return lhs; 5070 } 5071 if (lhs->isIntegerType() || lhs->isComplexIntegerType()) { 5072 // convert the lhs to the rhs complex type. 5073 return rhs; 5074 } 5075 // This handles complex/complex, complex/float, or float/complex. 5076 // When both operands are complex, the shorter operand is converted to the 5077 // type of the longer, and that is the type of the result. This corresponds 5078 // to what is done when combining two real floating-point operands. 5079 // The fun begins when size promotion occur across type domains. 5080 // From H&S 6.3.4: When one operand is complex and the other is a real 5081 // floating-point type, the less precise type is converted, within it's 5082 // real or complex domain, to the precision of the other type. For example, 5083 // when combining a "long double" with a "double _Complex", the 5084 // "double _Complex" is promoted to "long double _Complex". 5085 int result = getFloatingTypeOrder(lhs, rhs); 5086 5087 if (result > 0) { // The left side is bigger, convert rhs. 5088 rhs = getFloatingTypeOfSizeWithinDomain(lhs, rhs); 5089 } else if (result < 0) { // The right side is bigger, convert lhs. 5090 lhs = getFloatingTypeOfSizeWithinDomain(rhs, lhs); 5091 } 5092 // At this point, lhs and rhs have the same rank/size. Now, make sure the 5093 // domains match. This is a requirement for our implementation, C99 5094 // does not require this promotion. 5095 if (lhs != rhs) { // Domains don't match, we have complex/float mix. 5096 if (lhs->isRealFloatingType()) { // handle "double, _Complex double". 5097 return rhs; 5098 } else { // handle "_Complex double, double". 5099 return lhs; 5100 } 5101 } 5102 return lhs; // The domain/size match exactly. 5103 } 5104 // Now handle "real" floating types (i.e. float, double, long double). 5105 if (lhs->isRealFloatingType() || rhs->isRealFloatingType()) { 5106 // if we have an integer operand, the result is the real floating type. 5107 if (rhs->isIntegerType()) { 5108 // convert rhs to the lhs floating point type. 5109 return lhs; 5110 } 5111 if (rhs->isComplexIntegerType()) { 5112 // convert rhs to the complex floating point type. 5113 return getComplexType(lhs); 5114 } 5115 if (lhs->isIntegerType()) { 5116 // convert lhs to the rhs floating point type. 5117 return rhs; 5118 } 5119 if (lhs->isComplexIntegerType()) { 5120 // convert lhs to the complex floating point type. 5121 return getComplexType(rhs); 5122 } 5123 // We have two real floating types, float/complex combos were handled above. 5124 // Convert the smaller operand to the bigger result. 5125 int result = getFloatingTypeOrder(lhs, rhs); 5126 if (result > 0) // convert the rhs 5127 return lhs; 5128 assert(result < 0 && "illegal float comparison"); 5129 return rhs; // convert the lhs 5130 } 5131 if (lhs->isComplexIntegerType() || rhs->isComplexIntegerType()) { 5132 // Handle GCC complex int extension. 5133 const ComplexType *lhsComplexInt = lhs->getAsComplexIntegerType(); 5134 const ComplexType *rhsComplexInt = rhs->getAsComplexIntegerType(); 5135 5136 if (lhsComplexInt && rhsComplexInt) { 5137 if (getIntegerTypeOrder(lhsComplexInt->getElementType(), 5138 rhsComplexInt->getElementType()) >= 0) 5139 return lhs; // convert the rhs 5140 return rhs; 5141 } else if (lhsComplexInt && rhs->isIntegerType()) { 5142 // convert the rhs to the lhs complex type. 5143 return lhs; 5144 } else if (rhsComplexInt && lhs->isIntegerType()) { 5145 // convert the lhs to the rhs complex type. 5146 return rhs; 5147 } 5148 } 5149 // Finally, we have two differing integer types. 5150 // The rules for this case are in C99 6.3.1.8 5151 int compare = getIntegerTypeOrder(lhs, rhs); 5152 bool lhsSigned = lhs->isSignedIntegerType(), 5153 rhsSigned = rhs->isSignedIntegerType(); 5154 QualType destType; 5155 if (lhsSigned == rhsSigned) { 5156 // Same signedness; use the higher-ranked type 5157 destType = compare >= 0 ? lhs : rhs; 5158 } else if (compare != (lhsSigned ? 1 : -1)) { 5159 // The unsigned type has greater than or equal rank to the 5160 // signed type, so use the unsigned type 5161 destType = lhsSigned ? rhs : lhs; 5162 } else if (getIntWidth(lhs) != getIntWidth(rhs)) { 5163 // The two types are different widths; if we are here, that 5164 // means the signed type is larger than the unsigned type, so 5165 // use the signed type. 5166 destType = lhsSigned ? lhs : rhs; 5167 } else { 5168 // The signed type is higher-ranked than the unsigned type, 5169 // but isn't actually any bigger (like unsigned int and long 5170 // on most 32-bit systems). Use the unsigned type corresponding 5171 // to the signed type. 5172 destType = getCorrespondingUnsignedType(lhsSigned ? lhs : rhs); 5173 } 5174 return destType; 5175} 5176