ASTContext.cpp revision 0054531488928a424666ac11fcdc6bcc5112de52
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#include "RecordLayoutBuilder.h" 32 33using namespace clang; 34 35enum FloatingRank { 36 FloatRank, DoubleRank, LongDoubleRank 37}; 38 39ASTContext::ASTContext(const LangOptions& LOpts, SourceManager &SM, 40 const TargetInfo &t, 41 IdentifierTable &idents, SelectorTable &sels, 42 Builtin::Context &builtins, 43 bool FreeMem, unsigned size_reserve) : 44 GlobalNestedNameSpecifier(0), CFConstantStringTypeDecl(0), 45 NSConstantStringTypeDecl(0), 46 ObjCFastEnumerationStateTypeDecl(0), FILEDecl(0), jmp_bufDecl(0), 47 sigjmp_bufDecl(0), BlockDescriptorType(0), BlockDescriptorExtendedType(0), 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 RecordDecl*, const ASTRecordLayout*>::iterator 93 I = ASTRecordLayouts.begin(), E = ASTRecordLayouts.end(); I != E; ) { 94 // Increment in loop to prevent using deallocated memory. 95 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 96 R->Destroy(*this); 97 } 98 99 for (llvm::DenseMap<const ObjCContainerDecl*, 100 const ASTRecordLayout*>::iterator 101 I = ObjCLayouts.begin(), E = ObjCLayouts.end(); I != E; ) { 102 // Increment in loop to prevent using deallocated memory. 103 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 104 R->Destroy(*this); 105 } 106 } 107 108 // Destroy nested-name-specifiers. 109 for (llvm::FoldingSet<NestedNameSpecifier>::iterator 110 NNS = NestedNameSpecifiers.begin(), 111 NNSEnd = NestedNameSpecifiers.end(); 112 NNS != NNSEnd; ) { 113 // Increment in loop to prevent using deallocated memory. 114 (*NNS++).Destroy(*this); 115 } 116 117 if (GlobalNestedNameSpecifier) 118 GlobalNestedNameSpecifier->Destroy(*this); 119 120 TUDecl->Destroy(*this); 121} 122 123void ASTContext::AddDeallocation(void (*Callback)(void*), void *Data) { 124 Deallocations.push_back(std::make_pair(Callback, Data)); 125} 126 127void 128ASTContext::setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source) { 129 ExternalSource.reset(Source.take()); 130} 131 132void ASTContext::PrintStats() const { 133 fprintf(stderr, "*** AST Context Stats:\n"); 134 fprintf(stderr, " %d types total.\n", (int)Types.size()); 135 136 unsigned counts[] = { 137#define TYPE(Name, Parent) 0, 138#define ABSTRACT_TYPE(Name, Parent) 139#include "clang/AST/TypeNodes.def" 140 0 // Extra 141 }; 142 143 for (unsigned i = 0, e = Types.size(); i != e; ++i) { 144 Type *T = Types[i]; 145 counts[(unsigned)T->getTypeClass()]++; 146 } 147 148 unsigned Idx = 0; 149 unsigned TotalBytes = 0; 150#define TYPE(Name, Parent) \ 151 if (counts[Idx]) \ 152 fprintf(stderr, " %d %s types\n", (int)counts[Idx], #Name); \ 153 TotalBytes += counts[Idx] * sizeof(Name##Type); \ 154 ++Idx; 155#define ABSTRACT_TYPE(Name, Parent) 156#include "clang/AST/TypeNodes.def" 157 158 fprintf(stderr, "Total bytes = %d\n", int(TotalBytes)); 159 160 if (ExternalSource.get()) { 161 fprintf(stderr, "\n"); 162 ExternalSource->PrintStats(); 163 } 164} 165 166 167void ASTContext::InitBuiltinType(CanQualType &R, BuiltinType::Kind K) { 168 BuiltinType *Ty = new (*this, TypeAlignment) BuiltinType(K); 169 R = CanQualType::CreateUnsafe(QualType(Ty, 0)); 170 Types.push_back(Ty); 171} 172 173void ASTContext::InitBuiltinTypes() { 174 assert(VoidTy.isNull() && "Context reinitialized?"); 175 176 // C99 6.2.5p19. 177 InitBuiltinType(VoidTy, BuiltinType::Void); 178 179 // C99 6.2.5p2. 180 InitBuiltinType(BoolTy, BuiltinType::Bool); 181 // C99 6.2.5p3. 182 if (LangOpts.CharIsSigned) 183 InitBuiltinType(CharTy, BuiltinType::Char_S); 184 else 185 InitBuiltinType(CharTy, BuiltinType::Char_U); 186 // C99 6.2.5p4. 187 InitBuiltinType(SignedCharTy, BuiltinType::SChar); 188 InitBuiltinType(ShortTy, BuiltinType::Short); 189 InitBuiltinType(IntTy, BuiltinType::Int); 190 InitBuiltinType(LongTy, BuiltinType::Long); 191 InitBuiltinType(LongLongTy, BuiltinType::LongLong); 192 193 // C99 6.2.5p6. 194 InitBuiltinType(UnsignedCharTy, BuiltinType::UChar); 195 InitBuiltinType(UnsignedShortTy, BuiltinType::UShort); 196 InitBuiltinType(UnsignedIntTy, BuiltinType::UInt); 197 InitBuiltinType(UnsignedLongTy, BuiltinType::ULong); 198 InitBuiltinType(UnsignedLongLongTy, BuiltinType::ULongLong); 199 200 // C99 6.2.5p10. 201 InitBuiltinType(FloatTy, BuiltinType::Float); 202 InitBuiltinType(DoubleTy, BuiltinType::Double); 203 InitBuiltinType(LongDoubleTy, BuiltinType::LongDouble); 204 205 // GNU extension, 128-bit integers. 206 InitBuiltinType(Int128Ty, BuiltinType::Int128); 207 InitBuiltinType(UnsignedInt128Ty, BuiltinType::UInt128); 208 209 if (LangOpts.CPlusPlus) // C++ 3.9.1p5 210 InitBuiltinType(WCharTy, BuiltinType::WChar); 211 else // C99 212 WCharTy = getFromTargetType(Target.getWCharType()); 213 214 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 215 InitBuiltinType(Char16Ty, BuiltinType::Char16); 216 else // C99 217 Char16Ty = getFromTargetType(Target.getChar16Type()); 218 219 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 220 InitBuiltinType(Char32Ty, BuiltinType::Char32); 221 else // C99 222 Char32Ty = getFromTargetType(Target.getChar32Type()); 223 224 // Placeholder type for functions. 225 InitBuiltinType(OverloadTy, BuiltinType::Overload); 226 227 // Placeholder type for type-dependent expressions whose type is 228 // completely unknown. No code should ever check a type against 229 // DependentTy and users should never see it; however, it is here to 230 // help diagnose failures to properly check for type-dependent 231 // expressions. 232 InitBuiltinType(DependentTy, BuiltinType::Dependent); 233 234 // Placeholder type for C++0x auto declarations whose real type has 235 // not yet been deduced. 236 InitBuiltinType(UndeducedAutoTy, BuiltinType::UndeducedAuto); 237 238 // C99 6.2.5p11. 239 FloatComplexTy = getComplexType(FloatTy); 240 DoubleComplexTy = getComplexType(DoubleTy); 241 LongDoubleComplexTy = getComplexType(LongDoubleTy); 242 243 BuiltinVaListType = QualType(); 244 245 // "Builtin" typedefs set by Sema::ActOnTranslationUnitScope(). 246 ObjCIdTypedefType = QualType(); 247 ObjCClassTypedefType = QualType(); 248 ObjCSelTypedefType = QualType(); 249 250 // Builtin types for 'id', 'Class', and 'SEL'. 251 InitBuiltinType(ObjCBuiltinIdTy, BuiltinType::ObjCId); 252 InitBuiltinType(ObjCBuiltinClassTy, BuiltinType::ObjCClass); 253 InitBuiltinType(ObjCBuiltinSelTy, BuiltinType::ObjCSel); 254 255 ObjCConstantStringType = QualType(); 256 257 // void * type 258 VoidPtrTy = getPointerType(VoidTy); 259 260 // nullptr type (C++0x 2.14.7) 261 InitBuiltinType(NullPtrTy, BuiltinType::NullPtr); 262} 263 264MemberSpecializationInfo * 265ASTContext::getInstantiatedFromStaticDataMember(const VarDecl *Var) { 266 assert(Var->isStaticDataMember() && "Not a static data member"); 267 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *>::iterator Pos 268 = InstantiatedFromStaticDataMember.find(Var); 269 if (Pos == InstantiatedFromStaticDataMember.end()) 270 return 0; 271 272 return Pos->second; 273} 274 275void 276ASTContext::setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 277 TemplateSpecializationKind TSK) { 278 assert(Inst->isStaticDataMember() && "Not a static data member"); 279 assert(Tmpl->isStaticDataMember() && "Not a static data member"); 280 assert(!InstantiatedFromStaticDataMember[Inst] && 281 "Already noted what static data member was instantiated from"); 282 InstantiatedFromStaticDataMember[Inst] 283 = new (*this) MemberSpecializationInfo(Tmpl, TSK); 284} 285 286NamedDecl * 287ASTContext::getInstantiatedFromUsingDecl(UsingDecl *UUD) { 288 llvm::DenseMap<UsingDecl *, NamedDecl *>::const_iterator Pos 289 = InstantiatedFromUsingDecl.find(UUD); 290 if (Pos == InstantiatedFromUsingDecl.end()) 291 return 0; 292 293 return Pos->second; 294} 295 296void 297ASTContext::setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern) { 298 assert((isa<UsingDecl>(Pattern) || 299 isa<UnresolvedUsingValueDecl>(Pattern) || 300 isa<UnresolvedUsingTypenameDecl>(Pattern)) && 301 "pattern decl is not a using decl"); 302 assert(!InstantiatedFromUsingDecl[Inst] && "pattern already exists"); 303 InstantiatedFromUsingDecl[Inst] = Pattern; 304} 305 306UsingShadowDecl * 307ASTContext::getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst) { 308 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*>::const_iterator Pos 309 = InstantiatedFromUsingShadowDecl.find(Inst); 310 if (Pos == InstantiatedFromUsingShadowDecl.end()) 311 return 0; 312 313 return Pos->second; 314} 315 316void 317ASTContext::setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 318 UsingShadowDecl *Pattern) { 319 assert(!InstantiatedFromUsingShadowDecl[Inst] && "pattern already exists"); 320 InstantiatedFromUsingShadowDecl[Inst] = Pattern; 321} 322 323FieldDecl *ASTContext::getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field) { 324 llvm::DenseMap<FieldDecl *, FieldDecl *>::iterator Pos 325 = InstantiatedFromUnnamedFieldDecl.find(Field); 326 if (Pos == InstantiatedFromUnnamedFieldDecl.end()) 327 return 0; 328 329 return Pos->second; 330} 331 332void ASTContext::setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, 333 FieldDecl *Tmpl) { 334 assert(!Inst->getDeclName() && "Instantiated field decl is not unnamed"); 335 assert(!Tmpl->getDeclName() && "Template field decl is not unnamed"); 336 assert(!InstantiatedFromUnnamedFieldDecl[Inst] && 337 "Already noted what unnamed field was instantiated from"); 338 339 InstantiatedFromUnnamedFieldDecl[Inst] = Tmpl; 340} 341 342ASTContext::overridden_cxx_method_iterator 343ASTContext::overridden_methods_begin(const CXXMethodDecl *Method) const { 344 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 345 = OverriddenMethods.find(Method); 346 if (Pos == OverriddenMethods.end()) 347 return 0; 348 349 return Pos->second.begin(); 350} 351 352ASTContext::overridden_cxx_method_iterator 353ASTContext::overridden_methods_end(const CXXMethodDecl *Method) const { 354 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 355 = OverriddenMethods.find(Method); 356 if (Pos == OverriddenMethods.end()) 357 return 0; 358 359 return Pos->second.end(); 360} 361 362void ASTContext::addOverriddenMethod(const CXXMethodDecl *Method, 363 const CXXMethodDecl *Overridden) { 364 OverriddenMethods[Method].push_back(Overridden); 365} 366 367namespace { 368 class BeforeInTranslationUnit 369 : std::binary_function<SourceRange, SourceRange, bool> { 370 SourceManager *SourceMgr; 371 372 public: 373 explicit BeforeInTranslationUnit(SourceManager *SM) : SourceMgr(SM) { } 374 375 bool operator()(SourceRange X, SourceRange Y) { 376 return SourceMgr->isBeforeInTranslationUnit(X.getBegin(), Y.getBegin()); 377 } 378 }; 379} 380 381//===----------------------------------------------------------------------===// 382// Type Sizing and Analysis 383//===----------------------------------------------------------------------===// 384 385/// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 386/// scalar floating point type. 387const llvm::fltSemantics &ASTContext::getFloatTypeSemantics(QualType T) const { 388 const BuiltinType *BT = T->getAs<BuiltinType>(); 389 assert(BT && "Not a floating point type!"); 390 switch (BT->getKind()) { 391 default: assert(0 && "Not a floating point type!"); 392 case BuiltinType::Float: return Target.getFloatFormat(); 393 case BuiltinType::Double: return Target.getDoubleFormat(); 394 case BuiltinType::LongDouble: return Target.getLongDoubleFormat(); 395 } 396} 397 398/// getDeclAlign - Return a conservative estimate of the alignment of the 399/// specified decl. Note that bitfields do not have a valid alignment, so 400/// this method will assert on them. 401/// If @p RefAsPointee, references are treated like their underlying type 402/// (for alignof), else they're treated like pointers (for CodeGen). 403CharUnits ASTContext::getDeclAlign(const Decl *D, bool RefAsPointee) { 404 unsigned Align = Target.getCharWidth(); 405 406 if (const AlignedAttr* AA = D->getAttr<AlignedAttr>()) 407 Align = std::max(Align, AA->getMaxAlignment()); 408 409 if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) { 410 QualType T = VD->getType(); 411 if (const ReferenceType* RT = T->getAs<ReferenceType>()) { 412 if (RefAsPointee) 413 T = RT->getPointeeType(); 414 else 415 T = getPointerType(RT->getPointeeType()); 416 } 417 if (!T->isIncompleteType() && !T->isFunctionType()) { 418 // Incomplete or function types default to 1. 419 while (isa<VariableArrayType>(T) || isa<IncompleteArrayType>(T)) 420 T = cast<ArrayType>(T)->getElementType(); 421 422 Align = std::max(Align, getPreferredTypeAlign(T.getTypePtr())); 423 } 424 if (const FieldDecl *FD = dyn_cast<FieldDecl>(VD)) { 425 // In the case of a field in a packed struct, we want the minimum 426 // of the alignment of the field and the alignment of the struct. 427 Align = std::min(Align, 428 getPreferredTypeAlign(FD->getParent()->getTypeForDecl())); 429 } 430 } 431 432 return CharUnits::fromQuantity(Align / Target.getCharWidth()); 433} 434 435std::pair<CharUnits, CharUnits> 436ASTContext::getTypeInfoInChars(const Type *T) { 437 std::pair<uint64_t, unsigned> Info = getTypeInfo(T); 438 return std::make_pair(CharUnits::fromQuantity(Info.first / getCharWidth()), 439 CharUnits::fromQuantity(Info.second / getCharWidth())); 440} 441 442std::pair<CharUnits, CharUnits> 443ASTContext::getTypeInfoInChars(QualType T) { 444 return getTypeInfoInChars(T.getTypePtr()); 445} 446 447/// getTypeSize - Return the size of the specified type, in bits. This method 448/// does not work on incomplete types. 449/// 450/// FIXME: Pointers into different addr spaces could have different sizes and 451/// alignment requirements: getPointerInfo should take an AddrSpace, this 452/// should take a QualType, &c. 453std::pair<uint64_t, unsigned> 454ASTContext::getTypeInfo(const Type *T) { 455 uint64_t Width=0; 456 unsigned Align=8; 457 switch (T->getTypeClass()) { 458#define TYPE(Class, Base) 459#define ABSTRACT_TYPE(Class, Base) 460#define NON_CANONICAL_TYPE(Class, Base) 461#define DEPENDENT_TYPE(Class, Base) case Type::Class: 462#include "clang/AST/TypeNodes.def" 463 assert(false && "Should not see dependent types"); 464 break; 465 466 case Type::FunctionNoProto: 467 case Type::FunctionProto: 468 // GCC extension: alignof(function) = 32 bits 469 Width = 0; 470 Align = 32; 471 break; 472 473 case Type::IncompleteArray: 474 case Type::VariableArray: 475 Width = 0; 476 Align = getTypeAlign(cast<ArrayType>(T)->getElementType()); 477 break; 478 479 case Type::ConstantArray: { 480 const ConstantArrayType *CAT = cast<ConstantArrayType>(T); 481 482 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(CAT->getElementType()); 483 Width = EltInfo.first*CAT->getSize().getZExtValue(); 484 Align = EltInfo.second; 485 break; 486 } 487 case Type::ExtVector: 488 case Type::Vector: { 489 const VectorType *VT = cast<VectorType>(T); 490 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(VT->getElementType()); 491 Width = EltInfo.first*VT->getNumElements(); 492 Align = Width; 493 // If the alignment is not a power of 2, round up to the next power of 2. 494 // This happens for non-power-of-2 length vectors. 495 if (Align & (Align-1)) { 496 Align = llvm::NextPowerOf2(Align); 497 Width = llvm::RoundUpToAlignment(Width, Align); 498 } 499 break; 500 } 501 502 case Type::Builtin: 503 switch (cast<BuiltinType>(T)->getKind()) { 504 default: assert(0 && "Unknown builtin type!"); 505 case BuiltinType::Void: 506 // GCC extension: alignof(void) = 8 bits. 507 Width = 0; 508 Align = 8; 509 break; 510 511 case BuiltinType::Bool: 512 Width = Target.getBoolWidth(); 513 Align = Target.getBoolAlign(); 514 break; 515 case BuiltinType::Char_S: 516 case BuiltinType::Char_U: 517 case BuiltinType::UChar: 518 case BuiltinType::SChar: 519 Width = Target.getCharWidth(); 520 Align = Target.getCharAlign(); 521 break; 522 case BuiltinType::WChar: 523 Width = Target.getWCharWidth(); 524 Align = Target.getWCharAlign(); 525 break; 526 case BuiltinType::Char16: 527 Width = Target.getChar16Width(); 528 Align = Target.getChar16Align(); 529 break; 530 case BuiltinType::Char32: 531 Width = Target.getChar32Width(); 532 Align = Target.getChar32Align(); 533 break; 534 case BuiltinType::UShort: 535 case BuiltinType::Short: 536 Width = Target.getShortWidth(); 537 Align = Target.getShortAlign(); 538 break; 539 case BuiltinType::UInt: 540 case BuiltinType::Int: 541 Width = Target.getIntWidth(); 542 Align = Target.getIntAlign(); 543 break; 544 case BuiltinType::ULong: 545 case BuiltinType::Long: 546 Width = Target.getLongWidth(); 547 Align = Target.getLongAlign(); 548 break; 549 case BuiltinType::ULongLong: 550 case BuiltinType::LongLong: 551 Width = Target.getLongLongWidth(); 552 Align = Target.getLongLongAlign(); 553 break; 554 case BuiltinType::Int128: 555 case BuiltinType::UInt128: 556 Width = 128; 557 Align = 128; // int128_t is 128-bit aligned on all targets. 558 break; 559 case BuiltinType::Float: 560 Width = Target.getFloatWidth(); 561 Align = Target.getFloatAlign(); 562 break; 563 case BuiltinType::Double: 564 Width = Target.getDoubleWidth(); 565 Align = Target.getDoubleAlign(); 566 break; 567 case BuiltinType::LongDouble: 568 Width = Target.getLongDoubleWidth(); 569 Align = Target.getLongDoubleAlign(); 570 break; 571 case BuiltinType::NullPtr: 572 Width = Target.getPointerWidth(0); // C++ 3.9.1p11: sizeof(nullptr_t) 573 Align = Target.getPointerAlign(0); // == sizeof(void*) 574 break; 575 } 576 break; 577 case Type::ObjCObjectPointer: 578 Width = Target.getPointerWidth(0); 579 Align = Target.getPointerAlign(0); 580 break; 581 case Type::BlockPointer: { 582 unsigned AS = cast<BlockPointerType>(T)->getPointeeType().getAddressSpace(); 583 Width = Target.getPointerWidth(AS); 584 Align = Target.getPointerAlign(AS); 585 break; 586 } 587 case Type::LValueReference: 588 case Type::RValueReference: { 589 // alignof and sizeof should never enter this code path here, so we go 590 // the pointer route. 591 unsigned AS = cast<ReferenceType>(T)->getPointeeType().getAddressSpace(); 592 Width = Target.getPointerWidth(AS); 593 Align = Target.getPointerAlign(AS); 594 break; 595 } 596 case Type::Pointer: { 597 unsigned AS = cast<PointerType>(T)->getPointeeType().getAddressSpace(); 598 Width = Target.getPointerWidth(AS); 599 Align = Target.getPointerAlign(AS); 600 break; 601 } 602 case Type::MemberPointer: { 603 QualType Pointee = cast<MemberPointerType>(T)->getPointeeType(); 604 std::pair<uint64_t, unsigned> PtrDiffInfo = 605 getTypeInfo(getPointerDiffType()); 606 Width = PtrDiffInfo.first; 607 if (Pointee->isFunctionType()) 608 Width *= 2; 609 Align = PtrDiffInfo.second; 610 break; 611 } 612 case Type::Complex: { 613 // Complex types have the same alignment as their elements, but twice the 614 // size. 615 std::pair<uint64_t, unsigned> EltInfo = 616 getTypeInfo(cast<ComplexType>(T)->getElementType()); 617 Width = EltInfo.first*2; 618 Align = EltInfo.second; 619 break; 620 } 621 case Type::ObjCObject: 622 return getTypeInfo(cast<ObjCObjectType>(T)->getBaseType().getTypePtr()); 623 case Type::ObjCInterface: { 624 const ObjCInterfaceType *ObjCI = cast<ObjCInterfaceType>(T); 625 const ASTRecordLayout &Layout = getASTObjCInterfaceLayout(ObjCI->getDecl()); 626 Width = Layout.getSize(); 627 Align = Layout.getAlignment(); 628 break; 629 } 630 case Type::Record: 631 case Type::Enum: { 632 const TagType *TT = cast<TagType>(T); 633 634 if (TT->getDecl()->isInvalidDecl()) { 635 Width = 1; 636 Align = 1; 637 break; 638 } 639 640 if (const EnumType *ET = dyn_cast<EnumType>(TT)) 641 return getTypeInfo(ET->getDecl()->getIntegerType()); 642 643 const RecordType *RT = cast<RecordType>(TT); 644 const ASTRecordLayout &Layout = getASTRecordLayout(RT->getDecl()); 645 Width = Layout.getSize(); 646 Align = Layout.getAlignment(); 647 break; 648 } 649 650 case Type::SubstTemplateTypeParm: 651 return getTypeInfo(cast<SubstTemplateTypeParmType>(T)-> 652 getReplacementType().getTypePtr()); 653 654 case Type::Typedef: { 655 const TypedefDecl *Typedef = cast<TypedefType>(T)->getDecl(); 656 if (const AlignedAttr *Aligned = Typedef->getAttr<AlignedAttr>()) { 657 Align = std::max(Aligned->getMaxAlignment(), 658 getTypeAlign(Typedef->getUnderlyingType().getTypePtr())); 659 Width = getTypeSize(Typedef->getUnderlyingType().getTypePtr()); 660 } else 661 return getTypeInfo(Typedef->getUnderlyingType().getTypePtr()); 662 break; 663 } 664 665 case Type::TypeOfExpr: 666 return getTypeInfo(cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType() 667 .getTypePtr()); 668 669 case Type::TypeOf: 670 return getTypeInfo(cast<TypeOfType>(T)->getUnderlyingType().getTypePtr()); 671 672 case Type::Decltype: 673 return getTypeInfo(cast<DecltypeType>(T)->getUnderlyingExpr()->getType() 674 .getTypePtr()); 675 676 case Type::Elaborated: 677 return getTypeInfo(cast<ElaboratedType>(T)->getNamedType().getTypePtr()); 678 679 case Type::TemplateSpecialization: 680 assert(getCanonicalType(T) != T && 681 "Cannot request the size of a dependent type"); 682 // FIXME: this is likely to be wrong once we support template 683 // aliases, since a template alias could refer to a typedef that 684 // has an __aligned__ attribute on it. 685 return getTypeInfo(getCanonicalType(T)); 686 } 687 688 assert(Align && (Align & (Align-1)) == 0 && "Alignment must be power of 2"); 689 return std::make_pair(Width, Align); 690} 691 692/// getTypeSizeInChars - Return the size of the specified type, in characters. 693/// This method does not work on incomplete types. 694CharUnits ASTContext::getTypeSizeInChars(QualType T) { 695 return CharUnits::fromQuantity(getTypeSize(T) / getCharWidth()); 696} 697CharUnits ASTContext::getTypeSizeInChars(const Type *T) { 698 return CharUnits::fromQuantity(getTypeSize(T) / getCharWidth()); 699} 700 701/// getTypeAlignInChars - Return the ABI-specified alignment of a type, in 702/// characters. This method does not work on incomplete types. 703CharUnits ASTContext::getTypeAlignInChars(QualType T) { 704 return CharUnits::fromQuantity(getTypeAlign(T) / getCharWidth()); 705} 706CharUnits ASTContext::getTypeAlignInChars(const Type *T) { 707 return CharUnits::fromQuantity(getTypeAlign(T) / getCharWidth()); 708} 709 710/// getPreferredTypeAlign - Return the "preferred" alignment of the specified 711/// type for the current target in bits. This can be different than the ABI 712/// alignment in cases where it is beneficial for performance to overalign 713/// a data type. 714unsigned ASTContext::getPreferredTypeAlign(const Type *T) { 715 unsigned ABIAlign = getTypeAlign(T); 716 717 // Double and long long should be naturally aligned if possible. 718 if (const ComplexType* CT = T->getAs<ComplexType>()) 719 T = CT->getElementType().getTypePtr(); 720 if (T->isSpecificBuiltinType(BuiltinType::Double) || 721 T->isSpecificBuiltinType(BuiltinType::LongLong)) 722 return std::max(ABIAlign, (unsigned)getTypeSize(T)); 723 724 return ABIAlign; 725} 726 727static void CollectLocalObjCIvars(ASTContext *Ctx, 728 const ObjCInterfaceDecl *OI, 729 llvm::SmallVectorImpl<FieldDecl*> &Fields) { 730 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 731 E = OI->ivar_end(); I != E; ++I) { 732 ObjCIvarDecl *IVDecl = *I; 733 if (!IVDecl->isInvalidDecl()) 734 Fields.push_back(cast<FieldDecl>(IVDecl)); 735 } 736} 737 738void ASTContext::CollectObjCIvars(const ObjCInterfaceDecl *OI, 739 llvm::SmallVectorImpl<FieldDecl*> &Fields) { 740 if (const ObjCInterfaceDecl *SuperClass = OI->getSuperClass()) 741 CollectObjCIvars(SuperClass, Fields); 742 CollectLocalObjCIvars(this, OI, Fields); 743} 744 745/// ShallowCollectObjCIvars - 746/// Collect all ivars, including those synthesized, in the current class. 747/// 748void ASTContext::ShallowCollectObjCIvars(const ObjCInterfaceDecl *OI, 749 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 750 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 751 E = OI->ivar_end(); I != E; ++I) { 752 Ivars.push_back(*I); 753 } 754 755 CollectNonClassIvars(OI, Ivars); 756} 757 758/// CollectNonClassIvars - 759/// This routine collects all other ivars which are not declared in the class. 760/// This includes synthesized ivars (via @synthesize) and those in 761// class's @implementation. 762/// 763void ASTContext::CollectNonClassIvars(const ObjCInterfaceDecl *OI, 764 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 765 // Find ivars declared in class extension. 766 if (const ObjCCategoryDecl *CDecl = OI->getClassExtension()) { 767 for (ObjCCategoryDecl::ivar_iterator I = CDecl->ivar_begin(), 768 E = CDecl->ivar_end(); I != E; ++I) { 769 Ivars.push_back(*I); 770 } 771 } 772 773 // Also add any ivar defined in this class's implementation. This 774 // includes synthesized ivars. 775 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) { 776 for (ObjCImplementationDecl::ivar_iterator I = ImplDecl->ivar_begin(), 777 E = ImplDecl->ivar_end(); I != E; ++I) 778 Ivars.push_back(*I); 779 } 780} 781 782/// CollectInheritedProtocols - Collect all protocols in current class and 783/// those inherited by it. 784void ASTContext::CollectInheritedProtocols(const Decl *CDecl, 785 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols) { 786 if (const ObjCInterfaceDecl *OI = dyn_cast<ObjCInterfaceDecl>(CDecl)) { 787 for (ObjCInterfaceDecl::protocol_iterator P = OI->protocol_begin(), 788 PE = OI->protocol_end(); P != PE; ++P) { 789 ObjCProtocolDecl *Proto = (*P); 790 Protocols.insert(Proto); 791 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 792 PE = Proto->protocol_end(); P != PE; ++P) { 793 Protocols.insert(*P); 794 CollectInheritedProtocols(*P, Protocols); 795 } 796 } 797 798 // Categories of this Interface. 799 for (const ObjCCategoryDecl *CDeclChain = OI->getCategoryList(); 800 CDeclChain; CDeclChain = CDeclChain->getNextClassCategory()) 801 CollectInheritedProtocols(CDeclChain, Protocols); 802 if (ObjCInterfaceDecl *SD = OI->getSuperClass()) 803 while (SD) { 804 CollectInheritedProtocols(SD, Protocols); 805 SD = SD->getSuperClass(); 806 } 807 } else if (const ObjCCategoryDecl *OC = dyn_cast<ObjCCategoryDecl>(CDecl)) { 808 for (ObjCInterfaceDecl::protocol_iterator P = OC->protocol_begin(), 809 PE = OC->protocol_end(); P != PE; ++P) { 810 ObjCProtocolDecl *Proto = (*P); 811 Protocols.insert(Proto); 812 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 813 PE = Proto->protocol_end(); P != PE; ++P) 814 CollectInheritedProtocols(*P, Protocols); 815 } 816 } else if (const ObjCProtocolDecl *OP = dyn_cast<ObjCProtocolDecl>(CDecl)) { 817 for (ObjCProtocolDecl::protocol_iterator P = OP->protocol_begin(), 818 PE = OP->protocol_end(); P != PE; ++P) { 819 ObjCProtocolDecl *Proto = (*P); 820 Protocols.insert(Proto); 821 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 822 PE = Proto->protocol_end(); P != PE; ++P) 823 CollectInheritedProtocols(*P, Protocols); 824 } 825 } 826} 827 828unsigned ASTContext::CountNonClassIvars(const ObjCInterfaceDecl *OI) { 829 unsigned count = 0; 830 // Count ivars declared in class extension. 831 if (const ObjCCategoryDecl *CDecl = OI->getClassExtension()) 832 count += CDecl->ivar_size(); 833 834 // Count ivar defined in this class's implementation. This 835 // includes synthesized ivars. 836 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) 837 count += ImplDecl->ivar_size(); 838 839 return count; 840} 841 842/// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 843ObjCImplementationDecl *ASTContext::getObjCImplementation(ObjCInterfaceDecl *D) { 844 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 845 I = ObjCImpls.find(D); 846 if (I != ObjCImpls.end()) 847 return cast<ObjCImplementationDecl>(I->second); 848 return 0; 849} 850/// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 851ObjCCategoryImplDecl *ASTContext::getObjCImplementation(ObjCCategoryDecl *D) { 852 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 853 I = ObjCImpls.find(D); 854 if (I != ObjCImpls.end()) 855 return cast<ObjCCategoryImplDecl>(I->second); 856 return 0; 857} 858 859/// \brief Set the implementation of ObjCInterfaceDecl. 860void ASTContext::setObjCImplementation(ObjCInterfaceDecl *IFaceD, 861 ObjCImplementationDecl *ImplD) { 862 assert(IFaceD && ImplD && "Passed null params"); 863 ObjCImpls[IFaceD] = ImplD; 864} 865/// \brief Set the implementation of ObjCCategoryDecl. 866void ASTContext::setObjCImplementation(ObjCCategoryDecl *CatD, 867 ObjCCategoryImplDecl *ImplD) { 868 assert(CatD && ImplD && "Passed null params"); 869 ObjCImpls[CatD] = ImplD; 870} 871 872/// \brief Allocate an uninitialized TypeSourceInfo. 873/// 874/// The caller should initialize the memory held by TypeSourceInfo using 875/// the TypeLoc wrappers. 876/// 877/// \param T the type that will be the basis for type source info. This type 878/// should refer to how the declarator was written in source code, not to 879/// what type semantic analysis resolved the declarator to. 880TypeSourceInfo *ASTContext::CreateTypeSourceInfo(QualType T, 881 unsigned DataSize) { 882 if (!DataSize) 883 DataSize = TypeLoc::getFullDataSizeForType(T); 884 else 885 assert(DataSize == TypeLoc::getFullDataSizeForType(T) && 886 "incorrect data size provided to CreateTypeSourceInfo!"); 887 888 TypeSourceInfo *TInfo = 889 (TypeSourceInfo*)BumpAlloc.Allocate(sizeof(TypeSourceInfo) + DataSize, 8); 890 new (TInfo) TypeSourceInfo(T); 891 return TInfo; 892} 893 894TypeSourceInfo *ASTContext::getTrivialTypeSourceInfo(QualType T, 895 SourceLocation L) { 896 TypeSourceInfo *DI = CreateTypeSourceInfo(T); 897 DI->getTypeLoc().initialize(L); 898 return DI; 899} 900 901/// getInterfaceLayoutImpl - Get or compute information about the 902/// layout of the given interface. 903/// 904/// \param Impl - If given, also include the layout of the interface's 905/// implementation. This may differ by including synthesized ivars. 906const ASTRecordLayout & 907ASTContext::getObjCLayout(const ObjCInterfaceDecl *D, 908 const ObjCImplementationDecl *Impl) { 909 assert(!D->isForwardDecl() && "Invalid interface decl!"); 910 911 // Look up this layout, if already laid out, return what we have. 912 ObjCContainerDecl *Key = 913 Impl ? (ObjCContainerDecl*) Impl : (ObjCContainerDecl*) D; 914 if (const ASTRecordLayout *Entry = ObjCLayouts[Key]) 915 return *Entry; 916 917 // Add in synthesized ivar count if laying out an implementation. 918 if (Impl) { 919 unsigned SynthCount = CountNonClassIvars(D); 920 // If there aren't any sythesized ivars then reuse the interface 921 // entry. Note we can't cache this because we simply free all 922 // entries later; however we shouldn't look up implementations 923 // frequently. 924 if (SynthCount == 0) 925 return getObjCLayout(D, 0); 926 } 927 928 const ASTRecordLayout *NewEntry = 929 ASTRecordLayoutBuilder::ComputeLayout(*this, D, Impl); 930 ObjCLayouts[Key] = NewEntry; 931 932 return *NewEntry; 933} 934 935const ASTRecordLayout & 936ASTContext::getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) { 937 return getObjCLayout(D, 0); 938} 939 940const ASTRecordLayout & 941ASTContext::getASTObjCImplementationLayout(const ObjCImplementationDecl *D) { 942 return getObjCLayout(D->getClassInterface(), D); 943} 944 945/// getASTRecordLayout - Get or compute information about the layout of the 946/// specified record (struct/union/class), which indicates its size and field 947/// position information. 948const ASTRecordLayout &ASTContext::getASTRecordLayout(const RecordDecl *D) { 949 D = D->getDefinition(); 950 assert(D && "Cannot get layout of forward declarations!"); 951 952 // Look up this layout, if already laid out, return what we have. 953 // Note that we can't save a reference to the entry because this function 954 // is recursive. 955 const ASTRecordLayout *Entry = ASTRecordLayouts[D]; 956 if (Entry) return *Entry; 957 958 const ASTRecordLayout *NewEntry = 959 ASTRecordLayoutBuilder::ComputeLayout(*this, D); 960 ASTRecordLayouts[D] = NewEntry; 961 962 if (getLangOptions().DumpRecordLayouts) { 963 llvm::errs() << "\n*** Dumping AST Record Layout\n"; 964 DumpRecordLayout(D, llvm::errs()); 965 } 966 967 return *NewEntry; 968} 969 970const CXXMethodDecl *ASTContext::getKeyFunction(const CXXRecordDecl *RD) { 971 RD = cast<CXXRecordDecl>(RD->getDefinition()); 972 assert(RD && "Cannot get key function for forward declarations!"); 973 974 const CXXMethodDecl *&Entry = KeyFunctions[RD]; 975 if (!Entry) 976 Entry = ASTRecordLayoutBuilder::ComputeKeyFunction(RD); 977 else 978 assert(Entry == ASTRecordLayoutBuilder::ComputeKeyFunction(RD) && 979 "Key function changed!"); 980 981 return Entry; 982} 983 984//===----------------------------------------------------------------------===// 985// Type creation/memoization methods 986//===----------------------------------------------------------------------===// 987 988QualType ASTContext::getExtQualType(const Type *TypeNode, Qualifiers Quals) { 989 unsigned Fast = Quals.getFastQualifiers(); 990 Quals.removeFastQualifiers(); 991 992 // Check if we've already instantiated this type. 993 llvm::FoldingSetNodeID ID; 994 ExtQuals::Profile(ID, TypeNode, Quals); 995 void *InsertPos = 0; 996 if (ExtQuals *EQ = ExtQualNodes.FindNodeOrInsertPos(ID, InsertPos)) { 997 assert(EQ->getQualifiers() == Quals); 998 QualType T = QualType(EQ, Fast); 999 return T; 1000 } 1001 1002 ExtQuals *New = new (*this, TypeAlignment) ExtQuals(*this, TypeNode, Quals); 1003 ExtQualNodes.InsertNode(New, InsertPos); 1004 QualType T = QualType(New, Fast); 1005 return T; 1006} 1007 1008QualType ASTContext::getVolatileType(QualType T) { 1009 QualType CanT = getCanonicalType(T); 1010 if (CanT.isVolatileQualified()) return T; 1011 1012 QualifierCollector Quals; 1013 const Type *TypeNode = Quals.strip(T); 1014 Quals.addVolatile(); 1015 1016 return getExtQualType(TypeNode, Quals); 1017} 1018 1019QualType ASTContext::getAddrSpaceQualType(QualType T, unsigned AddressSpace) { 1020 QualType CanT = getCanonicalType(T); 1021 if (CanT.getAddressSpace() == AddressSpace) 1022 return T; 1023 1024 // If we are composing extended qualifiers together, merge together 1025 // into one ExtQuals node. 1026 QualifierCollector Quals; 1027 const Type *TypeNode = Quals.strip(T); 1028 1029 // If this type already has an address space specified, it cannot get 1030 // another one. 1031 assert(!Quals.hasAddressSpace() && 1032 "Type cannot be in multiple addr spaces!"); 1033 Quals.addAddressSpace(AddressSpace); 1034 1035 return getExtQualType(TypeNode, Quals); 1036} 1037 1038QualType ASTContext::getObjCGCQualType(QualType T, 1039 Qualifiers::GC GCAttr) { 1040 QualType CanT = getCanonicalType(T); 1041 if (CanT.getObjCGCAttr() == GCAttr) 1042 return T; 1043 1044 if (T->isPointerType()) { 1045 QualType Pointee = T->getAs<PointerType>()->getPointeeType(); 1046 if (Pointee->isAnyPointerType()) { 1047 QualType ResultType = getObjCGCQualType(Pointee, GCAttr); 1048 return getPointerType(ResultType); 1049 } 1050 } 1051 1052 // If we are composing extended qualifiers together, merge together 1053 // into one ExtQuals node. 1054 QualifierCollector Quals; 1055 const Type *TypeNode = Quals.strip(T); 1056 1057 // If this type already has an ObjCGC specified, it cannot get 1058 // another one. 1059 assert(!Quals.hasObjCGCAttr() && 1060 "Type cannot have multiple ObjCGCs!"); 1061 Quals.addObjCGCAttr(GCAttr); 1062 1063 return getExtQualType(TypeNode, Quals); 1064} 1065 1066static QualType getExtFunctionType(ASTContext& Context, QualType T, 1067 const FunctionType::ExtInfo &Info) { 1068 QualType ResultType; 1069 if (const PointerType *Pointer = T->getAs<PointerType>()) { 1070 QualType Pointee = Pointer->getPointeeType(); 1071 ResultType = getExtFunctionType(Context, Pointee, Info); 1072 if (ResultType == Pointee) 1073 return T; 1074 1075 ResultType = Context.getPointerType(ResultType); 1076 } else if (const BlockPointerType *BlockPointer 1077 = T->getAs<BlockPointerType>()) { 1078 QualType Pointee = BlockPointer->getPointeeType(); 1079 ResultType = getExtFunctionType(Context, Pointee, Info); 1080 if (ResultType == Pointee) 1081 return T; 1082 1083 ResultType = Context.getBlockPointerType(ResultType); 1084 } else if (const FunctionType *F = T->getAs<FunctionType>()) { 1085 if (F->getExtInfo() == Info) 1086 return T; 1087 1088 if (const FunctionNoProtoType *FNPT = dyn_cast<FunctionNoProtoType>(F)) { 1089 ResultType = Context.getFunctionNoProtoType(FNPT->getResultType(), 1090 Info); 1091 } else { 1092 const FunctionProtoType *FPT = cast<FunctionProtoType>(F); 1093 ResultType 1094 = Context.getFunctionType(FPT->getResultType(), FPT->arg_type_begin(), 1095 FPT->getNumArgs(), FPT->isVariadic(), 1096 FPT->getTypeQuals(), 1097 FPT->hasExceptionSpec(), 1098 FPT->hasAnyExceptionSpec(), 1099 FPT->getNumExceptions(), 1100 FPT->exception_begin(), 1101 Info); 1102 } 1103 } else 1104 return T; 1105 1106 return Context.getQualifiedType(ResultType, T.getLocalQualifiers()); 1107} 1108 1109QualType ASTContext::getNoReturnType(QualType T, bool AddNoReturn) { 1110 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1111 return getExtFunctionType(*this, T, 1112 Info.withNoReturn(AddNoReturn)); 1113} 1114 1115QualType ASTContext::getCallConvType(QualType T, CallingConv CallConv) { 1116 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1117 return getExtFunctionType(*this, T, 1118 Info.withCallingConv(CallConv)); 1119} 1120 1121QualType ASTContext::getRegParmType(QualType T, unsigned RegParm) { 1122 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1123 return getExtFunctionType(*this, T, 1124 Info.withRegParm(RegParm)); 1125} 1126 1127/// getComplexType - Return the uniqued reference to the type for a complex 1128/// number with the specified element type. 1129QualType ASTContext::getComplexType(QualType T) { 1130 // Unique pointers, to guarantee there is only one pointer of a particular 1131 // structure. 1132 llvm::FoldingSetNodeID ID; 1133 ComplexType::Profile(ID, T); 1134 1135 void *InsertPos = 0; 1136 if (ComplexType *CT = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos)) 1137 return QualType(CT, 0); 1138 1139 // If the pointee type isn't canonical, this won't be a canonical type either, 1140 // so fill in the canonical type field. 1141 QualType Canonical; 1142 if (!T.isCanonical()) { 1143 Canonical = getComplexType(getCanonicalType(T)); 1144 1145 // Get the new insert position for the node we care about. 1146 ComplexType *NewIP = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos); 1147 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1148 } 1149 ComplexType *New = new (*this, TypeAlignment) ComplexType(T, Canonical); 1150 Types.push_back(New); 1151 ComplexTypes.InsertNode(New, InsertPos); 1152 return QualType(New, 0); 1153} 1154 1155/// getPointerType - Return the uniqued reference to the type for a pointer to 1156/// the specified type. 1157QualType ASTContext::getPointerType(QualType T) { 1158 // Unique pointers, to guarantee there is only one pointer of a particular 1159 // structure. 1160 llvm::FoldingSetNodeID ID; 1161 PointerType::Profile(ID, T); 1162 1163 void *InsertPos = 0; 1164 if (PointerType *PT = PointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1165 return QualType(PT, 0); 1166 1167 // If the pointee type isn't canonical, this won't be a canonical type either, 1168 // so fill in the canonical type field. 1169 QualType Canonical; 1170 if (!T.isCanonical()) { 1171 Canonical = getPointerType(getCanonicalType(T)); 1172 1173 // Get the new insert position for the node we care about. 1174 PointerType *NewIP = PointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1175 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1176 } 1177 PointerType *New = new (*this, TypeAlignment) PointerType(T, Canonical); 1178 Types.push_back(New); 1179 PointerTypes.InsertNode(New, InsertPos); 1180 return QualType(New, 0); 1181} 1182 1183/// getBlockPointerType - Return the uniqued reference to the type for 1184/// a pointer to the specified block. 1185QualType ASTContext::getBlockPointerType(QualType T) { 1186 assert(T->isFunctionType() && "block of function types only"); 1187 // Unique pointers, to guarantee there is only one block of a particular 1188 // structure. 1189 llvm::FoldingSetNodeID ID; 1190 BlockPointerType::Profile(ID, T); 1191 1192 void *InsertPos = 0; 1193 if (BlockPointerType *PT = 1194 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1195 return QualType(PT, 0); 1196 1197 // If the block pointee type isn't canonical, this won't be a canonical 1198 // type either so fill in the canonical type field. 1199 QualType Canonical; 1200 if (!T.isCanonical()) { 1201 Canonical = getBlockPointerType(getCanonicalType(T)); 1202 1203 // Get the new insert position for the node we care about. 1204 BlockPointerType *NewIP = 1205 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1206 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1207 } 1208 BlockPointerType *New 1209 = new (*this, TypeAlignment) BlockPointerType(T, Canonical); 1210 Types.push_back(New); 1211 BlockPointerTypes.InsertNode(New, InsertPos); 1212 return QualType(New, 0); 1213} 1214 1215/// getLValueReferenceType - Return the uniqued reference to the type for an 1216/// lvalue reference to the specified type. 1217QualType ASTContext::getLValueReferenceType(QualType T, bool SpelledAsLValue) { 1218 // Unique pointers, to guarantee there is only one pointer of a particular 1219 // structure. 1220 llvm::FoldingSetNodeID ID; 1221 ReferenceType::Profile(ID, T, SpelledAsLValue); 1222 1223 void *InsertPos = 0; 1224 if (LValueReferenceType *RT = 1225 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1226 return QualType(RT, 0); 1227 1228 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1229 1230 // If the referencee type isn't canonical, this won't be a canonical type 1231 // either, so fill in the canonical type field. 1232 QualType Canonical; 1233 if (!SpelledAsLValue || InnerRef || !T.isCanonical()) { 1234 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1235 Canonical = getLValueReferenceType(getCanonicalType(PointeeType)); 1236 1237 // Get the new insert position for the node we care about. 1238 LValueReferenceType *NewIP = 1239 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1240 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1241 } 1242 1243 LValueReferenceType *New 1244 = new (*this, TypeAlignment) LValueReferenceType(T, Canonical, 1245 SpelledAsLValue); 1246 Types.push_back(New); 1247 LValueReferenceTypes.InsertNode(New, InsertPos); 1248 1249 return QualType(New, 0); 1250} 1251 1252/// getRValueReferenceType - Return the uniqued reference to the type for an 1253/// rvalue reference to the specified type. 1254QualType ASTContext::getRValueReferenceType(QualType T) { 1255 // Unique pointers, to guarantee there is only one pointer of a particular 1256 // structure. 1257 llvm::FoldingSetNodeID ID; 1258 ReferenceType::Profile(ID, T, false); 1259 1260 void *InsertPos = 0; 1261 if (RValueReferenceType *RT = 1262 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1263 return QualType(RT, 0); 1264 1265 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1266 1267 // If the referencee type isn't canonical, this won't be a canonical type 1268 // either, so fill in the canonical type field. 1269 QualType Canonical; 1270 if (InnerRef || !T.isCanonical()) { 1271 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1272 Canonical = getRValueReferenceType(getCanonicalType(PointeeType)); 1273 1274 // Get the new insert position for the node we care about. 1275 RValueReferenceType *NewIP = 1276 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1277 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1278 } 1279 1280 RValueReferenceType *New 1281 = new (*this, TypeAlignment) RValueReferenceType(T, Canonical); 1282 Types.push_back(New); 1283 RValueReferenceTypes.InsertNode(New, InsertPos); 1284 return QualType(New, 0); 1285} 1286 1287/// getMemberPointerType - Return the uniqued reference to the type for a 1288/// member pointer to the specified type, in the specified class. 1289QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls) { 1290 // Unique pointers, to guarantee there is only one pointer of a particular 1291 // structure. 1292 llvm::FoldingSetNodeID ID; 1293 MemberPointerType::Profile(ID, T, Cls); 1294 1295 void *InsertPos = 0; 1296 if (MemberPointerType *PT = 1297 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1298 return QualType(PT, 0); 1299 1300 // If the pointee or class type isn't canonical, this won't be a canonical 1301 // type either, so fill in the canonical type field. 1302 QualType Canonical; 1303 if (!T.isCanonical() || !Cls->isCanonicalUnqualified()) { 1304 Canonical = getMemberPointerType(getCanonicalType(T),getCanonicalType(Cls)); 1305 1306 // Get the new insert position for the node we care about. 1307 MemberPointerType *NewIP = 1308 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1309 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1310 } 1311 MemberPointerType *New 1312 = new (*this, TypeAlignment) MemberPointerType(T, Cls, Canonical); 1313 Types.push_back(New); 1314 MemberPointerTypes.InsertNode(New, InsertPos); 1315 return QualType(New, 0); 1316} 1317 1318/// getConstantArrayType - Return the unique reference to the type for an 1319/// array of the specified element type. 1320QualType ASTContext::getConstantArrayType(QualType EltTy, 1321 const llvm::APInt &ArySizeIn, 1322 ArrayType::ArraySizeModifier ASM, 1323 unsigned EltTypeQuals) { 1324 assert((EltTy->isDependentType() || 1325 EltTy->isIncompleteType() || EltTy->isConstantSizeType()) && 1326 "Constant array of VLAs is illegal!"); 1327 1328 // Convert the array size into a canonical width matching the pointer size for 1329 // the target. 1330 llvm::APInt ArySize(ArySizeIn); 1331 ArySize.zextOrTrunc(Target.getPointerWidth(EltTy.getAddressSpace())); 1332 1333 llvm::FoldingSetNodeID ID; 1334 ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, EltTypeQuals); 1335 1336 void *InsertPos = 0; 1337 if (ConstantArrayType *ATP = 1338 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1339 return QualType(ATP, 0); 1340 1341 // If the element type isn't canonical, this won't be a canonical type either, 1342 // so fill in the canonical type field. 1343 QualType Canonical; 1344 if (!EltTy.isCanonical()) { 1345 Canonical = getConstantArrayType(getCanonicalType(EltTy), ArySize, 1346 ASM, EltTypeQuals); 1347 // Get the new insert position for the node we care about. 1348 ConstantArrayType *NewIP = 1349 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1350 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1351 } 1352 1353 ConstantArrayType *New = new(*this,TypeAlignment) 1354 ConstantArrayType(EltTy, Canonical, ArySize, ASM, EltTypeQuals); 1355 ConstantArrayTypes.InsertNode(New, InsertPos); 1356 Types.push_back(New); 1357 return QualType(New, 0); 1358} 1359 1360/// getVariableArrayType - Returns a non-unique reference to the type for a 1361/// variable array of the specified element type. 1362QualType ASTContext::getVariableArrayType(QualType EltTy, 1363 Expr *NumElts, 1364 ArrayType::ArraySizeModifier ASM, 1365 unsigned EltTypeQuals, 1366 SourceRange Brackets) { 1367 // Since we don't unique expressions, it isn't possible to unique VLA's 1368 // that have an expression provided for their size. 1369 QualType CanonType; 1370 1371 if (!EltTy.isCanonical()) { 1372 if (NumElts) 1373 NumElts->Retain(); 1374 CanonType = getVariableArrayType(getCanonicalType(EltTy), NumElts, ASM, 1375 EltTypeQuals, Brackets); 1376 } 1377 1378 VariableArrayType *New = new(*this, TypeAlignment) 1379 VariableArrayType(EltTy, CanonType, NumElts, ASM, EltTypeQuals, Brackets); 1380 1381 VariableArrayTypes.push_back(New); 1382 Types.push_back(New); 1383 return QualType(New, 0); 1384} 1385 1386/// getDependentSizedArrayType - Returns a non-unique reference to 1387/// the type for a dependently-sized array of the specified element 1388/// type. 1389QualType ASTContext::getDependentSizedArrayType(QualType EltTy, 1390 Expr *NumElts, 1391 ArrayType::ArraySizeModifier ASM, 1392 unsigned EltTypeQuals, 1393 SourceRange Brackets) { 1394 assert((!NumElts || NumElts->isTypeDependent() || 1395 NumElts->isValueDependent()) && 1396 "Size must be type- or value-dependent!"); 1397 1398 void *InsertPos = 0; 1399 DependentSizedArrayType *Canon = 0; 1400 llvm::FoldingSetNodeID ID; 1401 1402 if (NumElts) { 1403 // Dependently-sized array types that do not have a specified 1404 // number of elements will have their sizes deduced from an 1405 // initializer. 1406 DependentSizedArrayType::Profile(ID, *this, getCanonicalType(EltTy), ASM, 1407 EltTypeQuals, NumElts); 1408 1409 Canon = DependentSizedArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1410 } 1411 1412 DependentSizedArrayType *New; 1413 if (Canon) { 1414 // We already have a canonical version of this array type; use it as 1415 // the canonical type for a newly-built type. 1416 New = new (*this, TypeAlignment) 1417 DependentSizedArrayType(*this, EltTy, QualType(Canon, 0), 1418 NumElts, ASM, EltTypeQuals, Brackets); 1419 } else { 1420 QualType CanonEltTy = getCanonicalType(EltTy); 1421 if (CanonEltTy == EltTy) { 1422 New = new (*this, TypeAlignment) 1423 DependentSizedArrayType(*this, EltTy, QualType(), 1424 NumElts, ASM, EltTypeQuals, Brackets); 1425 1426 if (NumElts) { 1427 DependentSizedArrayType *CanonCheck 1428 = DependentSizedArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1429 assert(!CanonCheck && "Dependent-sized canonical array type broken"); 1430 (void)CanonCheck; 1431 DependentSizedArrayTypes.InsertNode(New, InsertPos); 1432 } 1433 } else { 1434 QualType Canon = getDependentSizedArrayType(CanonEltTy, NumElts, 1435 ASM, EltTypeQuals, 1436 SourceRange()); 1437 New = new (*this, TypeAlignment) 1438 DependentSizedArrayType(*this, EltTy, Canon, 1439 NumElts, ASM, EltTypeQuals, Brackets); 1440 } 1441 } 1442 1443 Types.push_back(New); 1444 return QualType(New, 0); 1445} 1446 1447QualType ASTContext::getIncompleteArrayType(QualType EltTy, 1448 ArrayType::ArraySizeModifier ASM, 1449 unsigned EltTypeQuals) { 1450 llvm::FoldingSetNodeID ID; 1451 IncompleteArrayType::Profile(ID, EltTy, ASM, EltTypeQuals); 1452 1453 void *InsertPos = 0; 1454 if (IncompleteArrayType *ATP = 1455 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1456 return QualType(ATP, 0); 1457 1458 // If the element type isn't canonical, this won't be a canonical type 1459 // either, so fill in the canonical type field. 1460 QualType Canonical; 1461 1462 if (!EltTy.isCanonical()) { 1463 Canonical = getIncompleteArrayType(getCanonicalType(EltTy), 1464 ASM, EltTypeQuals); 1465 1466 // Get the new insert position for the node we care about. 1467 IncompleteArrayType *NewIP = 1468 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1469 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1470 } 1471 1472 IncompleteArrayType *New = new (*this, TypeAlignment) 1473 IncompleteArrayType(EltTy, Canonical, ASM, EltTypeQuals); 1474 1475 IncompleteArrayTypes.InsertNode(New, InsertPos); 1476 Types.push_back(New); 1477 return QualType(New, 0); 1478} 1479 1480/// getVectorType - Return the unique reference to a vector type of 1481/// the specified element type and size. VectorType must be a built-in type. 1482QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts, 1483 bool IsAltiVec, bool IsPixel) { 1484 BuiltinType *baseType; 1485 1486 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1487 assert(baseType != 0 && "getVectorType(): Expecting a built-in type"); 1488 1489 // Check if we've already instantiated a vector of this type. 1490 llvm::FoldingSetNodeID ID; 1491 VectorType::Profile(ID, vecType, NumElts, Type::Vector, 1492 IsAltiVec, IsPixel); 1493 void *InsertPos = 0; 1494 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1495 return QualType(VTP, 0); 1496 1497 // If the element type isn't canonical, this won't be a canonical type either, 1498 // so fill in the canonical type field. 1499 QualType Canonical; 1500 if (!vecType.isCanonical() || IsAltiVec || IsPixel) { 1501 Canonical = getVectorType(getCanonicalType(vecType), 1502 NumElts, false, false); 1503 1504 // Get the new insert position for the node we care about. 1505 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1506 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1507 } 1508 VectorType *New = new (*this, TypeAlignment) 1509 VectorType(vecType, NumElts, Canonical, IsAltiVec, IsPixel); 1510 VectorTypes.InsertNode(New, InsertPos); 1511 Types.push_back(New); 1512 return QualType(New, 0); 1513} 1514 1515/// getExtVectorType - Return the unique reference to an extended vector type of 1516/// the specified element type and size. VectorType must be a built-in type. 1517QualType ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) { 1518 BuiltinType *baseType; 1519 1520 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1521 assert(baseType != 0 && "getExtVectorType(): Expecting a built-in type"); 1522 1523 // Check if we've already instantiated a vector of this type. 1524 llvm::FoldingSetNodeID ID; 1525 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector, false, false); 1526 void *InsertPos = 0; 1527 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1528 return QualType(VTP, 0); 1529 1530 // If the element type isn't canonical, this won't be a canonical type either, 1531 // so fill in the canonical type field. 1532 QualType Canonical; 1533 if (!vecType.isCanonical()) { 1534 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts); 1535 1536 // Get the new insert position for the node we care about. 1537 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1538 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1539 } 1540 ExtVectorType *New = new (*this, TypeAlignment) 1541 ExtVectorType(vecType, NumElts, Canonical); 1542 VectorTypes.InsertNode(New, InsertPos); 1543 Types.push_back(New); 1544 return QualType(New, 0); 1545} 1546 1547QualType ASTContext::getDependentSizedExtVectorType(QualType vecType, 1548 Expr *SizeExpr, 1549 SourceLocation AttrLoc) { 1550 llvm::FoldingSetNodeID ID; 1551 DependentSizedExtVectorType::Profile(ID, *this, getCanonicalType(vecType), 1552 SizeExpr); 1553 1554 void *InsertPos = 0; 1555 DependentSizedExtVectorType *Canon 1556 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1557 DependentSizedExtVectorType *New; 1558 if (Canon) { 1559 // We already have a canonical version of this array type; use it as 1560 // the canonical type for a newly-built type. 1561 New = new (*this, TypeAlignment) 1562 DependentSizedExtVectorType(*this, vecType, QualType(Canon, 0), 1563 SizeExpr, AttrLoc); 1564 } else { 1565 QualType CanonVecTy = getCanonicalType(vecType); 1566 if (CanonVecTy == vecType) { 1567 New = new (*this, TypeAlignment) 1568 DependentSizedExtVectorType(*this, vecType, QualType(), SizeExpr, 1569 AttrLoc); 1570 1571 DependentSizedExtVectorType *CanonCheck 1572 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1573 assert(!CanonCheck && "Dependent-sized ext_vector canonical type broken"); 1574 (void)CanonCheck; 1575 DependentSizedExtVectorTypes.InsertNode(New, InsertPos); 1576 } else { 1577 QualType Canon = getDependentSizedExtVectorType(CanonVecTy, SizeExpr, 1578 SourceLocation()); 1579 New = new (*this, TypeAlignment) 1580 DependentSizedExtVectorType(*this, vecType, Canon, SizeExpr, AttrLoc); 1581 } 1582 } 1583 1584 Types.push_back(New); 1585 return QualType(New, 0); 1586} 1587 1588/// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 1589/// 1590QualType ASTContext::getFunctionNoProtoType(QualType ResultTy, 1591 const FunctionType::ExtInfo &Info) { 1592 const CallingConv CallConv = Info.getCC(); 1593 // Unique functions, to guarantee there is only one function of a particular 1594 // structure. 1595 llvm::FoldingSetNodeID ID; 1596 FunctionNoProtoType::Profile(ID, ResultTy, Info); 1597 1598 void *InsertPos = 0; 1599 if (FunctionNoProtoType *FT = 1600 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1601 return QualType(FT, 0); 1602 1603 QualType Canonical; 1604 if (!ResultTy.isCanonical() || 1605 getCanonicalCallConv(CallConv) != CallConv) { 1606 Canonical = 1607 getFunctionNoProtoType(getCanonicalType(ResultTy), 1608 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1609 1610 // Get the new insert position for the node we care about. 1611 FunctionNoProtoType *NewIP = 1612 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1613 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1614 } 1615 1616 FunctionNoProtoType *New = new (*this, TypeAlignment) 1617 FunctionNoProtoType(ResultTy, Canonical, Info); 1618 Types.push_back(New); 1619 FunctionNoProtoTypes.InsertNode(New, InsertPos); 1620 return QualType(New, 0); 1621} 1622 1623/// getFunctionType - Return a normal function type with a typed argument 1624/// list. isVariadic indicates whether the argument list includes '...'. 1625QualType ASTContext::getFunctionType(QualType ResultTy,const QualType *ArgArray, 1626 unsigned NumArgs, bool isVariadic, 1627 unsigned TypeQuals, bool hasExceptionSpec, 1628 bool hasAnyExceptionSpec, unsigned NumExs, 1629 const QualType *ExArray, 1630 const FunctionType::ExtInfo &Info) { 1631 const CallingConv CallConv= Info.getCC(); 1632 // Unique functions, to guarantee there is only one function of a particular 1633 // structure. 1634 llvm::FoldingSetNodeID ID; 1635 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, isVariadic, 1636 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1637 NumExs, ExArray, Info); 1638 1639 void *InsertPos = 0; 1640 if (FunctionProtoType *FTP = 1641 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1642 return QualType(FTP, 0); 1643 1644 // Determine whether the type being created is already canonical or not. 1645 bool isCanonical = !hasExceptionSpec && ResultTy.isCanonical(); 1646 for (unsigned i = 0; i != NumArgs && isCanonical; ++i) 1647 if (!ArgArray[i].isCanonicalAsParam()) 1648 isCanonical = false; 1649 1650 // If this type isn't canonical, get the canonical version of it. 1651 // The exception spec is not part of the canonical type. 1652 QualType Canonical; 1653 if (!isCanonical || getCanonicalCallConv(CallConv) != CallConv) { 1654 llvm::SmallVector<QualType, 16> CanonicalArgs; 1655 CanonicalArgs.reserve(NumArgs); 1656 for (unsigned i = 0; i != NumArgs; ++i) 1657 CanonicalArgs.push_back(getCanonicalParamType(ArgArray[i])); 1658 1659 Canonical = getFunctionType(getCanonicalType(ResultTy), 1660 CanonicalArgs.data(), NumArgs, 1661 isVariadic, TypeQuals, false, 1662 false, 0, 0, 1663 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1664 1665 // Get the new insert position for the node we care about. 1666 FunctionProtoType *NewIP = 1667 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1668 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1669 } 1670 1671 // FunctionProtoType objects are allocated with extra bytes after them 1672 // for two variable size arrays (for parameter and exception types) at the 1673 // end of them. 1674 FunctionProtoType *FTP = 1675 (FunctionProtoType*)Allocate(sizeof(FunctionProtoType) + 1676 NumArgs*sizeof(QualType) + 1677 NumExs*sizeof(QualType), TypeAlignment); 1678 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, isVariadic, 1679 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1680 ExArray, NumExs, Canonical, Info); 1681 Types.push_back(FTP); 1682 FunctionProtoTypes.InsertNode(FTP, InsertPos); 1683 return QualType(FTP, 0); 1684} 1685 1686#ifndef NDEBUG 1687static bool NeedsInjectedClassNameType(const RecordDecl *D) { 1688 if (!isa<CXXRecordDecl>(D)) return false; 1689 const CXXRecordDecl *RD = cast<CXXRecordDecl>(D); 1690 if (isa<ClassTemplatePartialSpecializationDecl>(RD)) 1691 return true; 1692 if (RD->getDescribedClassTemplate() && 1693 !isa<ClassTemplateSpecializationDecl>(RD)) 1694 return true; 1695 return false; 1696} 1697#endif 1698 1699/// getInjectedClassNameType - Return the unique reference to the 1700/// injected class name type for the specified templated declaration. 1701QualType ASTContext::getInjectedClassNameType(CXXRecordDecl *Decl, 1702 QualType TST) { 1703 assert(NeedsInjectedClassNameType(Decl)); 1704 if (Decl->TypeForDecl) { 1705 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1706 } else if (CXXRecordDecl *PrevDecl 1707 = cast_or_null<CXXRecordDecl>(Decl->getPreviousDeclaration())) { 1708 assert(PrevDecl->TypeForDecl && "previous declaration has no type"); 1709 Decl->TypeForDecl = PrevDecl->TypeForDecl; 1710 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1711 } else { 1712 Decl->TypeForDecl = 1713 new (*this, TypeAlignment) InjectedClassNameType(Decl, TST); 1714 Types.push_back(Decl->TypeForDecl); 1715 } 1716 return QualType(Decl->TypeForDecl, 0); 1717} 1718 1719/// getTypeDeclType - Return the unique reference to the type for the 1720/// specified type declaration. 1721QualType ASTContext::getTypeDeclTypeSlow(const TypeDecl *Decl) { 1722 assert(Decl && "Passed null for Decl param"); 1723 assert(!Decl->TypeForDecl && "TypeForDecl present in slow case"); 1724 1725 if (const TypedefDecl *Typedef = dyn_cast<TypedefDecl>(Decl)) 1726 return getTypedefType(Typedef); 1727 1728 assert(!isa<TemplateTypeParmDecl>(Decl) && 1729 "Template type parameter types are always available."); 1730 1731 if (const RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) { 1732 assert(!Record->getPreviousDeclaration() && 1733 "struct/union has previous declaration"); 1734 assert(!NeedsInjectedClassNameType(Record)); 1735 Decl->TypeForDecl = new (*this, TypeAlignment) RecordType(Record); 1736 } else if (const EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) { 1737 assert(!Enum->getPreviousDeclaration() && 1738 "enum has previous declaration"); 1739 Decl->TypeForDecl = new (*this, TypeAlignment) EnumType(Enum); 1740 } else if (const UnresolvedUsingTypenameDecl *Using = 1741 dyn_cast<UnresolvedUsingTypenameDecl>(Decl)) { 1742 Decl->TypeForDecl = new (*this, TypeAlignment) UnresolvedUsingType(Using); 1743 } else 1744 llvm_unreachable("TypeDecl without a type?"); 1745 1746 Types.push_back(Decl->TypeForDecl); 1747 return QualType(Decl->TypeForDecl, 0); 1748} 1749 1750/// getTypedefType - Return the unique reference to the type for the 1751/// specified typename decl. 1752QualType ASTContext::getTypedefType(const TypedefDecl *Decl) { 1753 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1754 1755 QualType Canonical = getCanonicalType(Decl->getUnderlyingType()); 1756 Decl->TypeForDecl = new(*this, TypeAlignment) 1757 TypedefType(Type::Typedef, Decl, Canonical); 1758 Types.push_back(Decl->TypeForDecl); 1759 return QualType(Decl->TypeForDecl, 0); 1760} 1761 1762/// \brief Retrieve a substitution-result type. 1763QualType 1764ASTContext::getSubstTemplateTypeParmType(const TemplateTypeParmType *Parm, 1765 QualType Replacement) { 1766 assert(Replacement.isCanonical() 1767 && "replacement types must always be canonical"); 1768 1769 llvm::FoldingSetNodeID ID; 1770 SubstTemplateTypeParmType::Profile(ID, Parm, Replacement); 1771 void *InsertPos = 0; 1772 SubstTemplateTypeParmType *SubstParm 1773 = SubstTemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1774 1775 if (!SubstParm) { 1776 SubstParm = new (*this, TypeAlignment) 1777 SubstTemplateTypeParmType(Parm, Replacement); 1778 Types.push_back(SubstParm); 1779 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 1780 } 1781 1782 return QualType(SubstParm, 0); 1783} 1784 1785/// \brief Retrieve the template type parameter type for a template 1786/// parameter or parameter pack with the given depth, index, and (optionally) 1787/// name. 1788QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index, 1789 bool ParameterPack, 1790 IdentifierInfo *Name) { 1791 llvm::FoldingSetNodeID ID; 1792 TemplateTypeParmType::Profile(ID, Depth, Index, ParameterPack, Name); 1793 void *InsertPos = 0; 1794 TemplateTypeParmType *TypeParm 1795 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1796 1797 if (TypeParm) 1798 return QualType(TypeParm, 0); 1799 1800 if (Name) { 1801 QualType Canon = getTemplateTypeParmType(Depth, Index, ParameterPack); 1802 TypeParm = new (*this, TypeAlignment) 1803 TemplateTypeParmType(Depth, Index, ParameterPack, Name, Canon); 1804 1805 TemplateTypeParmType *TypeCheck 1806 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1807 assert(!TypeCheck && "Template type parameter canonical type broken"); 1808 (void)TypeCheck; 1809 } else 1810 TypeParm = new (*this, TypeAlignment) 1811 TemplateTypeParmType(Depth, Index, ParameterPack); 1812 1813 Types.push_back(TypeParm); 1814 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos); 1815 1816 return QualType(TypeParm, 0); 1817} 1818 1819TypeSourceInfo * 1820ASTContext::getTemplateSpecializationTypeInfo(TemplateName Name, 1821 SourceLocation NameLoc, 1822 const TemplateArgumentListInfo &Args, 1823 QualType CanonType) { 1824 QualType TST = getTemplateSpecializationType(Name, Args, CanonType); 1825 1826 TypeSourceInfo *DI = CreateTypeSourceInfo(TST); 1827 TemplateSpecializationTypeLoc TL 1828 = cast<TemplateSpecializationTypeLoc>(DI->getTypeLoc()); 1829 TL.setTemplateNameLoc(NameLoc); 1830 TL.setLAngleLoc(Args.getLAngleLoc()); 1831 TL.setRAngleLoc(Args.getRAngleLoc()); 1832 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 1833 TL.setArgLocInfo(i, Args[i].getLocInfo()); 1834 return DI; 1835} 1836 1837QualType 1838ASTContext::getTemplateSpecializationType(TemplateName Template, 1839 const TemplateArgumentListInfo &Args, 1840 QualType Canon, 1841 bool IsCurrentInstantiation) { 1842 unsigned NumArgs = Args.size(); 1843 1844 llvm::SmallVector<TemplateArgument, 4> ArgVec; 1845 ArgVec.reserve(NumArgs); 1846 for (unsigned i = 0; i != NumArgs; ++i) 1847 ArgVec.push_back(Args[i].getArgument()); 1848 1849 return getTemplateSpecializationType(Template, ArgVec.data(), NumArgs, 1850 Canon, IsCurrentInstantiation); 1851} 1852 1853QualType 1854ASTContext::getTemplateSpecializationType(TemplateName Template, 1855 const TemplateArgument *Args, 1856 unsigned NumArgs, 1857 QualType Canon, 1858 bool IsCurrentInstantiation) { 1859 if (!Canon.isNull()) 1860 Canon = getCanonicalType(Canon); 1861 else { 1862 assert(!IsCurrentInstantiation && 1863 "current-instantiation specializations should always " 1864 "have a canonical type"); 1865 1866 // Build the canonical template specialization type. 1867 TemplateName CanonTemplate = getCanonicalTemplateName(Template); 1868 llvm::SmallVector<TemplateArgument, 4> CanonArgs; 1869 CanonArgs.reserve(NumArgs); 1870 for (unsigned I = 0; I != NumArgs; ++I) 1871 CanonArgs.push_back(getCanonicalTemplateArgument(Args[I])); 1872 1873 // Determine whether this canonical template specialization type already 1874 // exists. 1875 llvm::FoldingSetNodeID ID; 1876 TemplateSpecializationType::Profile(ID, CanonTemplate, false, 1877 CanonArgs.data(), NumArgs, *this); 1878 1879 void *InsertPos = 0; 1880 TemplateSpecializationType *Spec 1881 = TemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 1882 1883 if (!Spec) { 1884 // Allocate a new canonical template specialization type. 1885 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 1886 sizeof(TemplateArgument) * NumArgs), 1887 TypeAlignment); 1888 Spec = new (Mem) TemplateSpecializationType(*this, CanonTemplate, false, 1889 CanonArgs.data(), NumArgs, 1890 Canon); 1891 Types.push_back(Spec); 1892 TemplateSpecializationTypes.InsertNode(Spec, InsertPos); 1893 } 1894 1895 if (Canon.isNull()) 1896 Canon = QualType(Spec, 0); 1897 assert(Canon->isDependentType() && 1898 "Non-dependent template-id type must have a canonical type"); 1899 } 1900 1901 // Allocate the (non-canonical) template specialization type, but don't 1902 // try to unique it: these types typically have location information that 1903 // we don't unique and don't want to lose. 1904 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 1905 sizeof(TemplateArgument) * NumArgs), 1906 TypeAlignment); 1907 TemplateSpecializationType *Spec 1908 = new (Mem) TemplateSpecializationType(*this, Template, 1909 IsCurrentInstantiation, 1910 Args, NumArgs, 1911 Canon); 1912 1913 Types.push_back(Spec); 1914 return QualType(Spec, 0); 1915} 1916 1917QualType 1918ASTContext::getElaboratedType(ElaboratedTypeKeyword Keyword, 1919 NestedNameSpecifier *NNS, 1920 QualType NamedType) { 1921 llvm::FoldingSetNodeID ID; 1922 ElaboratedType::Profile(ID, Keyword, NNS, NamedType); 1923 1924 void *InsertPos = 0; 1925 ElaboratedType *T = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 1926 if (T) 1927 return QualType(T, 0); 1928 1929 QualType Canon = NamedType; 1930 if (!Canon.isCanonical()) { 1931 Canon = getCanonicalType(NamedType); 1932 ElaboratedType *CheckT = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 1933 assert(!CheckT && "Elaborated canonical type broken"); 1934 (void)CheckT; 1935 } 1936 1937 T = new (*this) ElaboratedType(Keyword, NNS, NamedType, Canon); 1938 Types.push_back(T); 1939 ElaboratedTypes.InsertNode(T, InsertPos); 1940 return QualType(T, 0); 1941} 1942 1943QualType ASTContext::getDependentNameType(ElaboratedTypeKeyword Keyword, 1944 NestedNameSpecifier *NNS, 1945 const IdentifierInfo *Name, 1946 QualType Canon) { 1947 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 1948 1949 if (Canon.isNull()) { 1950 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 1951 ElaboratedTypeKeyword CanonKeyword = Keyword; 1952 if (Keyword == ETK_None) 1953 CanonKeyword = ETK_Typename; 1954 1955 if (CanonNNS != NNS || CanonKeyword != Keyword) 1956 Canon = getDependentNameType(CanonKeyword, CanonNNS, Name); 1957 } 1958 1959 llvm::FoldingSetNodeID ID; 1960 DependentNameType::Profile(ID, Keyword, NNS, Name); 1961 1962 void *InsertPos = 0; 1963 DependentNameType *T 1964 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 1965 if (T) 1966 return QualType(T, 0); 1967 1968 T = new (*this) DependentNameType(Keyword, NNS, Name, Canon); 1969 Types.push_back(T); 1970 DependentNameTypes.InsertNode(T, InsertPos); 1971 return QualType(T, 0); 1972} 1973 1974QualType 1975ASTContext::getDependentNameType(ElaboratedTypeKeyword Keyword, 1976 NestedNameSpecifier *NNS, 1977 const TemplateSpecializationType *TemplateId, 1978 QualType Canon) { 1979 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 1980 1981 llvm::FoldingSetNodeID ID; 1982 DependentNameType::Profile(ID, Keyword, NNS, TemplateId); 1983 1984 void *InsertPos = 0; 1985 DependentNameType *T 1986 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 1987 if (T) 1988 return QualType(T, 0); 1989 1990 if (Canon.isNull()) { 1991 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 1992 QualType CanonType = getCanonicalType(QualType(TemplateId, 0)); 1993 ElaboratedTypeKeyword CanonKeyword = Keyword; 1994 if (Keyword == ETK_None) 1995 CanonKeyword = ETK_Typename; 1996 if (CanonNNS != NNS || CanonKeyword != Keyword || 1997 CanonType != QualType(TemplateId, 0)) { 1998 const TemplateSpecializationType *CanonTemplateId 1999 = CanonType->getAs<TemplateSpecializationType>(); 2000 assert(CanonTemplateId && 2001 "Canonical type must also be a template specialization type"); 2002 Canon = getDependentNameType(CanonKeyword, CanonNNS, CanonTemplateId); 2003 } 2004 2005 DependentNameType *CheckT 2006 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 2007 assert(!CheckT && "Typename canonical type is broken"); (void)CheckT; 2008 } 2009 2010 T = new (*this) DependentNameType(Keyword, NNS, TemplateId, Canon); 2011 Types.push_back(T); 2012 DependentNameTypes.InsertNode(T, InsertPos); 2013 return QualType(T, 0); 2014} 2015 2016/// CmpProtocolNames - Comparison predicate for sorting protocols 2017/// alphabetically. 2018static bool CmpProtocolNames(const ObjCProtocolDecl *LHS, 2019 const ObjCProtocolDecl *RHS) { 2020 return LHS->getDeclName() < RHS->getDeclName(); 2021} 2022 2023static bool areSortedAndUniqued(ObjCProtocolDecl * const *Protocols, 2024 unsigned NumProtocols) { 2025 if (NumProtocols == 0) return true; 2026 2027 for (unsigned i = 1; i != NumProtocols; ++i) 2028 if (!CmpProtocolNames(Protocols[i-1], Protocols[i])) 2029 return false; 2030 return true; 2031} 2032 2033static void SortAndUniqueProtocols(ObjCProtocolDecl **Protocols, 2034 unsigned &NumProtocols) { 2035 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols; 2036 2037 // Sort protocols, keyed by name. 2038 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames); 2039 2040 // Remove duplicates. 2041 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd); 2042 NumProtocols = ProtocolsEnd-Protocols; 2043} 2044 2045QualType ASTContext::getObjCObjectType(QualType BaseType, 2046 ObjCProtocolDecl * const *Protocols, 2047 unsigned NumProtocols) { 2048 // If the base type is an interface and there aren't any protocols 2049 // to add, then the interface type will do just fine. 2050 if (!NumProtocols && isa<ObjCInterfaceType>(BaseType)) 2051 return BaseType; 2052 2053 // Look in the folding set for an existing type. 2054 llvm::FoldingSetNodeID ID; 2055 ObjCObjectTypeImpl::Profile(ID, BaseType, Protocols, NumProtocols); 2056 void *InsertPos = 0; 2057 if (ObjCObjectType *QT = ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos)) 2058 return QualType(QT, 0); 2059 2060 // Build the canonical type, which has the canonical base type and 2061 // a sorted-and-uniqued list of protocols. 2062 QualType Canonical; 2063 bool ProtocolsSorted = areSortedAndUniqued(Protocols, NumProtocols); 2064 if (!ProtocolsSorted || !BaseType.isCanonical()) { 2065 if (!ProtocolsSorted) { 2066 llvm::SmallVector<ObjCProtocolDecl*, 8> Sorted(Protocols, 2067 Protocols + NumProtocols); 2068 unsigned UniqueCount = NumProtocols; 2069 2070 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2071 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2072 &Sorted[0], UniqueCount); 2073 } else { 2074 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2075 Protocols, NumProtocols); 2076 } 2077 2078 // Regenerate InsertPos. 2079 ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos); 2080 } 2081 2082 unsigned Size = sizeof(ObjCObjectTypeImpl); 2083 Size += NumProtocols * sizeof(ObjCProtocolDecl *); 2084 void *Mem = Allocate(Size, TypeAlignment); 2085 ObjCObjectTypeImpl *T = 2086 new (Mem) ObjCObjectTypeImpl(Canonical, BaseType, Protocols, NumProtocols); 2087 2088 Types.push_back(T); 2089 ObjCObjectTypes.InsertNode(T, InsertPos); 2090 return QualType(T, 0); 2091} 2092 2093/// getObjCObjectPointerType - Return a ObjCObjectPointerType type for 2094/// the given object type. 2095QualType ASTContext::getObjCObjectPointerType(QualType ObjectT) { 2096 llvm::FoldingSetNodeID ID; 2097 ObjCObjectPointerType::Profile(ID, ObjectT); 2098 2099 void *InsertPos = 0; 2100 if (ObjCObjectPointerType *QT = 2101 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 2102 return QualType(QT, 0); 2103 2104 // Find the canonical object type. 2105 QualType Canonical; 2106 if (!ObjectT.isCanonical()) { 2107 Canonical = getObjCObjectPointerType(getCanonicalType(ObjectT)); 2108 2109 // Regenerate InsertPos. 2110 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 2111 } 2112 2113 // No match. 2114 void *Mem = Allocate(sizeof(ObjCObjectPointerType), TypeAlignment); 2115 ObjCObjectPointerType *QType = 2116 new (Mem) ObjCObjectPointerType(Canonical, ObjectT); 2117 2118 Types.push_back(QType); 2119 ObjCObjectPointerTypes.InsertNode(QType, InsertPos); 2120 return QualType(QType, 0); 2121} 2122 2123/// getObjCInterfaceType - Return the unique reference to the type for the 2124/// specified ObjC interface decl. The list of protocols is optional. 2125QualType ASTContext::getObjCInterfaceType(const ObjCInterfaceDecl *Decl) { 2126 if (Decl->TypeForDecl) 2127 return QualType(Decl->TypeForDecl, 0); 2128 2129 // FIXME: redeclarations? 2130 void *Mem = Allocate(sizeof(ObjCInterfaceType), TypeAlignment); 2131 ObjCInterfaceType *T = new (Mem) ObjCInterfaceType(Decl); 2132 Decl->TypeForDecl = T; 2133 Types.push_back(T); 2134 return QualType(T, 0); 2135} 2136 2137/// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique 2138/// TypeOfExprType AST's (since expression's are never shared). For example, 2139/// multiple declarations that refer to "typeof(x)" all contain different 2140/// DeclRefExpr's. This doesn't effect the type checker, since it operates 2141/// on canonical type's (which are always unique). 2142QualType ASTContext::getTypeOfExprType(Expr *tofExpr) { 2143 TypeOfExprType *toe; 2144 if (tofExpr->isTypeDependent()) { 2145 llvm::FoldingSetNodeID ID; 2146 DependentTypeOfExprType::Profile(ID, *this, tofExpr); 2147 2148 void *InsertPos = 0; 2149 DependentTypeOfExprType *Canon 2150 = DependentTypeOfExprTypes.FindNodeOrInsertPos(ID, InsertPos); 2151 if (Canon) { 2152 // We already have a "canonical" version of an identical, dependent 2153 // typeof(expr) type. Use that as our canonical type. 2154 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, 2155 QualType((TypeOfExprType*)Canon, 0)); 2156 } 2157 else { 2158 // Build a new, canonical typeof(expr) type. 2159 Canon 2160 = new (*this, TypeAlignment) DependentTypeOfExprType(*this, tofExpr); 2161 DependentTypeOfExprTypes.InsertNode(Canon, InsertPos); 2162 toe = Canon; 2163 } 2164 } else { 2165 QualType Canonical = getCanonicalType(tofExpr->getType()); 2166 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, Canonical); 2167 } 2168 Types.push_back(toe); 2169 return QualType(toe, 0); 2170} 2171 2172/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique 2173/// TypeOfType AST's. The only motivation to unique these nodes would be 2174/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be 2175/// an issue. This doesn't effect the type checker, since it operates 2176/// on canonical type's (which are always unique). 2177QualType ASTContext::getTypeOfType(QualType tofType) { 2178 QualType Canonical = getCanonicalType(tofType); 2179 TypeOfType *tot = new (*this, TypeAlignment) TypeOfType(tofType, Canonical); 2180 Types.push_back(tot); 2181 return QualType(tot, 0); 2182} 2183 2184/// getDecltypeForExpr - Given an expr, will return the decltype for that 2185/// expression, according to the rules in C++0x [dcl.type.simple]p4 2186static QualType getDecltypeForExpr(const Expr *e, ASTContext &Context) { 2187 if (e->isTypeDependent()) 2188 return Context.DependentTy; 2189 2190 // If e is an id expression or a class member access, decltype(e) is defined 2191 // as the type of the entity named by e. 2192 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(e)) { 2193 if (const ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl())) 2194 return VD->getType(); 2195 } 2196 if (const MemberExpr *ME = dyn_cast<MemberExpr>(e)) { 2197 if (const FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) 2198 return FD->getType(); 2199 } 2200 // If e is a function call or an invocation of an overloaded operator, 2201 // (parentheses around e are ignored), decltype(e) is defined as the 2202 // return type of that function. 2203 if (const CallExpr *CE = dyn_cast<CallExpr>(e->IgnoreParens())) 2204 return CE->getCallReturnType(); 2205 2206 QualType T = e->getType(); 2207 2208 // Otherwise, where T is the type of e, if e is an lvalue, decltype(e) is 2209 // defined as T&, otherwise decltype(e) is defined as T. 2210 if (e->isLvalue(Context) == Expr::LV_Valid) 2211 T = Context.getLValueReferenceType(T); 2212 2213 return T; 2214} 2215 2216/// getDecltypeType - Unlike many "get<Type>" functions, we don't unique 2217/// DecltypeType AST's. The only motivation to unique these nodes would be 2218/// memory savings. Since decltype(t) is fairly uncommon, space shouldn't be 2219/// an issue. This doesn't effect the type checker, since it operates 2220/// on canonical type's (which are always unique). 2221QualType ASTContext::getDecltypeType(Expr *e) { 2222 DecltypeType *dt; 2223 if (e->isTypeDependent()) { 2224 llvm::FoldingSetNodeID ID; 2225 DependentDecltypeType::Profile(ID, *this, e); 2226 2227 void *InsertPos = 0; 2228 DependentDecltypeType *Canon 2229 = DependentDecltypeTypes.FindNodeOrInsertPos(ID, InsertPos); 2230 if (Canon) { 2231 // We already have a "canonical" version of an equivalent, dependent 2232 // decltype type. Use that as our canonical type. 2233 dt = new (*this, TypeAlignment) DecltypeType(e, DependentTy, 2234 QualType((DecltypeType*)Canon, 0)); 2235 } 2236 else { 2237 // Build a new, canonical typeof(expr) type. 2238 Canon = new (*this, TypeAlignment) DependentDecltypeType(*this, e); 2239 DependentDecltypeTypes.InsertNode(Canon, InsertPos); 2240 dt = Canon; 2241 } 2242 } else { 2243 QualType T = getDecltypeForExpr(e, *this); 2244 dt = new (*this, TypeAlignment) DecltypeType(e, T, getCanonicalType(T)); 2245 } 2246 Types.push_back(dt); 2247 return QualType(dt, 0); 2248} 2249 2250/// getTagDeclType - Return the unique reference to the type for the 2251/// specified TagDecl (struct/union/class/enum) decl. 2252QualType ASTContext::getTagDeclType(const TagDecl *Decl) { 2253 assert (Decl); 2254 // FIXME: What is the design on getTagDeclType when it requires casting 2255 // away const? mutable? 2256 return getTypeDeclType(const_cast<TagDecl*>(Decl)); 2257} 2258 2259/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result 2260/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and 2261/// needs to agree with the definition in <stddef.h>. 2262CanQualType ASTContext::getSizeType() const { 2263 return getFromTargetType(Target.getSizeType()); 2264} 2265 2266/// getSignedWCharType - Return the type of "signed wchar_t". 2267/// Used when in C++, as a GCC extension. 2268QualType ASTContext::getSignedWCharType() const { 2269 // FIXME: derive from "Target" ? 2270 return WCharTy; 2271} 2272 2273/// getUnsignedWCharType - Return the type of "unsigned wchar_t". 2274/// Used when in C++, as a GCC extension. 2275QualType ASTContext::getUnsignedWCharType() const { 2276 // FIXME: derive from "Target" ? 2277 return UnsignedIntTy; 2278} 2279 2280/// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 2281/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 2282QualType ASTContext::getPointerDiffType() const { 2283 return getFromTargetType(Target.getPtrDiffType(0)); 2284} 2285 2286//===----------------------------------------------------------------------===// 2287// Type Operators 2288//===----------------------------------------------------------------------===// 2289 2290CanQualType ASTContext::getCanonicalParamType(QualType T) { 2291 // Push qualifiers into arrays, and then discard any remaining 2292 // qualifiers. 2293 T = getCanonicalType(T); 2294 const Type *Ty = T.getTypePtr(); 2295 2296 QualType Result; 2297 if (isa<ArrayType>(Ty)) { 2298 Result = getArrayDecayedType(QualType(Ty,0)); 2299 } else if (isa<FunctionType>(Ty)) { 2300 Result = getPointerType(QualType(Ty, 0)); 2301 } else { 2302 Result = QualType(Ty, 0); 2303 } 2304 2305 return CanQualType::CreateUnsafe(Result); 2306} 2307 2308/// getCanonicalType - Return the canonical (structural) type corresponding to 2309/// the specified potentially non-canonical type. The non-canonical version 2310/// of a type may have many "decorated" versions of types. Decorators can 2311/// include typedefs, 'typeof' operators, etc. The returned type is guaranteed 2312/// to be free of any of these, allowing two canonical types to be compared 2313/// for exact equality with a simple pointer comparison. 2314CanQualType ASTContext::getCanonicalType(QualType T) { 2315 QualifierCollector Quals; 2316 const Type *Ptr = Quals.strip(T); 2317 QualType CanType = Ptr->getCanonicalTypeInternal(); 2318 2319 // The canonical internal type will be the canonical type *except* 2320 // that we push type qualifiers down through array types. 2321 2322 // If there are no new qualifiers to push down, stop here. 2323 if (!Quals.hasQualifiers()) 2324 return CanQualType::CreateUnsafe(CanType); 2325 2326 // If the type qualifiers are on an array type, get the canonical 2327 // type of the array with the qualifiers applied to the element 2328 // type. 2329 ArrayType *AT = dyn_cast<ArrayType>(CanType); 2330 if (!AT) 2331 return CanQualType::CreateUnsafe(getQualifiedType(CanType, Quals)); 2332 2333 // Get the canonical version of the element with the extra qualifiers on it. 2334 // This can recursively sink qualifiers through multiple levels of arrays. 2335 QualType NewEltTy = getQualifiedType(AT->getElementType(), Quals); 2336 NewEltTy = getCanonicalType(NewEltTy); 2337 2338 if (ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 2339 return CanQualType::CreateUnsafe( 2340 getConstantArrayType(NewEltTy, CAT->getSize(), 2341 CAT->getSizeModifier(), 2342 CAT->getIndexTypeCVRQualifiers())); 2343 if (IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) 2344 return CanQualType::CreateUnsafe( 2345 getIncompleteArrayType(NewEltTy, IAT->getSizeModifier(), 2346 IAT->getIndexTypeCVRQualifiers())); 2347 2348 if (DependentSizedArrayType *DSAT = dyn_cast<DependentSizedArrayType>(AT)) 2349 return CanQualType::CreateUnsafe( 2350 getDependentSizedArrayType(NewEltTy, 2351 DSAT->getSizeExpr() ? 2352 DSAT->getSizeExpr()->Retain() : 0, 2353 DSAT->getSizeModifier(), 2354 DSAT->getIndexTypeCVRQualifiers(), 2355 DSAT->getBracketsRange())->getCanonicalTypeInternal()); 2356 2357 VariableArrayType *VAT = cast<VariableArrayType>(AT); 2358 return CanQualType::CreateUnsafe(getVariableArrayType(NewEltTy, 2359 VAT->getSizeExpr() ? 2360 VAT->getSizeExpr()->Retain() : 0, 2361 VAT->getSizeModifier(), 2362 VAT->getIndexTypeCVRQualifiers(), 2363 VAT->getBracketsRange())); 2364} 2365 2366QualType ASTContext::getUnqualifiedArrayType(QualType T, 2367 Qualifiers &Quals) { 2368 Quals = T.getQualifiers(); 2369 const ArrayType *AT = getAsArrayType(T); 2370 if (!AT) { 2371 return T.getUnqualifiedType(); 2372 } 2373 2374 QualType Elt = AT->getElementType(); 2375 QualType UnqualElt = getUnqualifiedArrayType(Elt, Quals); 2376 if (Elt == UnqualElt) 2377 return T; 2378 2379 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) { 2380 return getConstantArrayType(UnqualElt, CAT->getSize(), 2381 CAT->getSizeModifier(), 0); 2382 } 2383 2384 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) { 2385 return getIncompleteArrayType(UnqualElt, IAT->getSizeModifier(), 0); 2386 } 2387 2388 if (const VariableArrayType *VAT = dyn_cast<VariableArrayType>(AT)) { 2389 return getVariableArrayType(UnqualElt, 2390 VAT->getSizeExpr() ? 2391 VAT->getSizeExpr()->Retain() : 0, 2392 VAT->getSizeModifier(), 2393 VAT->getIndexTypeCVRQualifiers(), 2394 VAT->getBracketsRange()); 2395 } 2396 2397 const DependentSizedArrayType *DSAT = cast<DependentSizedArrayType>(AT); 2398 return getDependentSizedArrayType(UnqualElt, DSAT->getSizeExpr()->Retain(), 2399 DSAT->getSizeModifier(), 0, 2400 SourceRange()); 2401} 2402 2403DeclarationName ASTContext::getNameForTemplate(TemplateName Name) { 2404 if (TemplateDecl *TD = Name.getAsTemplateDecl()) 2405 return TD->getDeclName(); 2406 2407 if (DependentTemplateName *DTN = Name.getAsDependentTemplateName()) { 2408 if (DTN->isIdentifier()) { 2409 return DeclarationNames.getIdentifier(DTN->getIdentifier()); 2410 } else { 2411 return DeclarationNames.getCXXOperatorName(DTN->getOperator()); 2412 } 2413 } 2414 2415 OverloadedTemplateStorage *Storage = Name.getAsOverloadedTemplate(); 2416 assert(Storage); 2417 return (*Storage->begin())->getDeclName(); 2418} 2419 2420TemplateName ASTContext::getCanonicalTemplateName(TemplateName Name) { 2421 // If this template name refers to a template, the canonical 2422 // template name merely stores the template itself. 2423 if (TemplateDecl *Template = Name.getAsTemplateDecl()) 2424 return TemplateName(cast<TemplateDecl>(Template->getCanonicalDecl())); 2425 2426 assert(!Name.getAsOverloadedTemplate()); 2427 2428 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 2429 assert(DTN && "Non-dependent template names must refer to template decls."); 2430 return DTN->CanonicalTemplateName; 2431} 2432 2433bool ASTContext::hasSameTemplateName(TemplateName X, TemplateName Y) { 2434 X = getCanonicalTemplateName(X); 2435 Y = getCanonicalTemplateName(Y); 2436 return X.getAsVoidPointer() == Y.getAsVoidPointer(); 2437} 2438 2439TemplateArgument 2440ASTContext::getCanonicalTemplateArgument(const TemplateArgument &Arg) { 2441 switch (Arg.getKind()) { 2442 case TemplateArgument::Null: 2443 return Arg; 2444 2445 case TemplateArgument::Expression: 2446 return Arg; 2447 2448 case TemplateArgument::Declaration: 2449 return TemplateArgument(Arg.getAsDecl()->getCanonicalDecl()); 2450 2451 case TemplateArgument::Template: 2452 return TemplateArgument(getCanonicalTemplateName(Arg.getAsTemplate())); 2453 2454 case TemplateArgument::Integral: 2455 return TemplateArgument(*Arg.getAsIntegral(), 2456 getCanonicalType(Arg.getIntegralType())); 2457 2458 case TemplateArgument::Type: 2459 return TemplateArgument(getCanonicalType(Arg.getAsType())); 2460 2461 case TemplateArgument::Pack: { 2462 // FIXME: Allocate in ASTContext 2463 TemplateArgument *CanonArgs = new TemplateArgument[Arg.pack_size()]; 2464 unsigned Idx = 0; 2465 for (TemplateArgument::pack_iterator A = Arg.pack_begin(), 2466 AEnd = Arg.pack_end(); 2467 A != AEnd; (void)++A, ++Idx) 2468 CanonArgs[Idx] = getCanonicalTemplateArgument(*A); 2469 2470 TemplateArgument Result; 2471 Result.setArgumentPack(CanonArgs, Arg.pack_size(), false); 2472 return Result; 2473 } 2474 } 2475 2476 // Silence GCC warning 2477 assert(false && "Unhandled template argument kind"); 2478 return TemplateArgument(); 2479} 2480 2481NestedNameSpecifier * 2482ASTContext::getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) { 2483 if (!NNS) 2484 return 0; 2485 2486 switch (NNS->getKind()) { 2487 case NestedNameSpecifier::Identifier: 2488 // Canonicalize the prefix but keep the identifier the same. 2489 return NestedNameSpecifier::Create(*this, 2490 getCanonicalNestedNameSpecifier(NNS->getPrefix()), 2491 NNS->getAsIdentifier()); 2492 2493 case NestedNameSpecifier::Namespace: 2494 // A namespace is canonical; build a nested-name-specifier with 2495 // this namespace and no prefix. 2496 return NestedNameSpecifier::Create(*this, 0, NNS->getAsNamespace()); 2497 2498 case NestedNameSpecifier::TypeSpec: 2499 case NestedNameSpecifier::TypeSpecWithTemplate: { 2500 QualType T = getCanonicalType(QualType(NNS->getAsType(), 0)); 2501 return NestedNameSpecifier::Create(*this, 0, 2502 NNS->getKind() == NestedNameSpecifier::TypeSpecWithTemplate, 2503 T.getTypePtr()); 2504 } 2505 2506 case NestedNameSpecifier::Global: 2507 // The global specifier is canonical and unique. 2508 return NNS; 2509 } 2510 2511 // Required to silence a GCC warning 2512 return 0; 2513} 2514 2515 2516const ArrayType *ASTContext::getAsArrayType(QualType T) { 2517 // Handle the non-qualified case efficiently. 2518 if (!T.hasLocalQualifiers()) { 2519 // Handle the common positive case fast. 2520 if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 2521 return AT; 2522 } 2523 2524 // Handle the common negative case fast. 2525 QualType CType = T->getCanonicalTypeInternal(); 2526 if (!isa<ArrayType>(CType)) 2527 return 0; 2528 2529 // Apply any qualifiers from the array type to the element type. This 2530 // implements C99 6.7.3p8: "If the specification of an array type includes 2531 // any type qualifiers, the element type is so qualified, not the array type." 2532 2533 // If we get here, we either have type qualifiers on the type, or we have 2534 // sugar such as a typedef in the way. If we have type qualifiers on the type 2535 // we must propagate them down into the element type. 2536 2537 QualifierCollector Qs; 2538 const Type *Ty = Qs.strip(T.getDesugaredType()); 2539 2540 // If we have a simple case, just return now. 2541 const ArrayType *ATy = dyn_cast<ArrayType>(Ty); 2542 if (ATy == 0 || Qs.empty()) 2543 return ATy; 2544 2545 // Otherwise, we have an array and we have qualifiers on it. Push the 2546 // qualifiers into the array element type and return a new array type. 2547 // Get the canonical version of the element with the extra qualifiers on it. 2548 // This can recursively sink qualifiers through multiple levels of arrays. 2549 QualType NewEltTy = getQualifiedType(ATy->getElementType(), Qs); 2550 2551 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy)) 2552 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(), 2553 CAT->getSizeModifier(), 2554 CAT->getIndexTypeCVRQualifiers())); 2555 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy)) 2556 return cast<ArrayType>(getIncompleteArrayType(NewEltTy, 2557 IAT->getSizeModifier(), 2558 IAT->getIndexTypeCVRQualifiers())); 2559 2560 if (const DependentSizedArrayType *DSAT 2561 = dyn_cast<DependentSizedArrayType>(ATy)) 2562 return cast<ArrayType>( 2563 getDependentSizedArrayType(NewEltTy, 2564 DSAT->getSizeExpr() ? 2565 DSAT->getSizeExpr()->Retain() : 0, 2566 DSAT->getSizeModifier(), 2567 DSAT->getIndexTypeCVRQualifiers(), 2568 DSAT->getBracketsRange())); 2569 2570 const VariableArrayType *VAT = cast<VariableArrayType>(ATy); 2571 return cast<ArrayType>(getVariableArrayType(NewEltTy, 2572 VAT->getSizeExpr() ? 2573 VAT->getSizeExpr()->Retain() : 0, 2574 VAT->getSizeModifier(), 2575 VAT->getIndexTypeCVRQualifiers(), 2576 VAT->getBracketsRange())); 2577} 2578 2579 2580/// getArrayDecayedType - Return the properly qualified result of decaying the 2581/// specified array type to a pointer. This operation is non-trivial when 2582/// handling typedefs etc. The canonical type of "T" must be an array type, 2583/// this returns a pointer to a properly qualified element of the array. 2584/// 2585/// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 2586QualType ASTContext::getArrayDecayedType(QualType Ty) { 2587 // Get the element type with 'getAsArrayType' so that we don't lose any 2588 // typedefs in the element type of the array. This also handles propagation 2589 // of type qualifiers from the array type into the element type if present 2590 // (C99 6.7.3p8). 2591 const ArrayType *PrettyArrayType = getAsArrayType(Ty); 2592 assert(PrettyArrayType && "Not an array type!"); 2593 2594 QualType PtrTy = getPointerType(PrettyArrayType->getElementType()); 2595 2596 // int x[restrict 4] -> int *restrict 2597 return getQualifiedType(PtrTy, PrettyArrayType->getIndexTypeQualifiers()); 2598} 2599 2600QualType ASTContext::getBaseElementType(QualType QT) { 2601 QualifierCollector Qs; 2602 while (const ArrayType *AT = getAsArrayType(QualType(Qs.strip(QT), 0))) 2603 QT = AT->getElementType(); 2604 return Qs.apply(QT); 2605} 2606 2607QualType ASTContext::getBaseElementType(const ArrayType *AT) { 2608 QualType ElemTy = AT->getElementType(); 2609 2610 if (const ArrayType *AT = getAsArrayType(ElemTy)) 2611 return getBaseElementType(AT); 2612 2613 return ElemTy; 2614} 2615 2616/// getConstantArrayElementCount - Returns number of constant array elements. 2617uint64_t 2618ASTContext::getConstantArrayElementCount(const ConstantArrayType *CA) const { 2619 uint64_t ElementCount = 1; 2620 do { 2621 ElementCount *= CA->getSize().getZExtValue(); 2622 CA = dyn_cast<ConstantArrayType>(CA->getElementType()); 2623 } while (CA); 2624 return ElementCount; 2625} 2626 2627/// getFloatingRank - Return a relative rank for floating point types. 2628/// This routine will assert if passed a built-in type that isn't a float. 2629static FloatingRank getFloatingRank(QualType T) { 2630 if (const ComplexType *CT = T->getAs<ComplexType>()) 2631 return getFloatingRank(CT->getElementType()); 2632 2633 assert(T->getAs<BuiltinType>() && "getFloatingRank(): not a floating type"); 2634 switch (T->getAs<BuiltinType>()->getKind()) { 2635 default: assert(0 && "getFloatingRank(): not a floating type"); 2636 case BuiltinType::Float: return FloatRank; 2637 case BuiltinType::Double: return DoubleRank; 2638 case BuiltinType::LongDouble: return LongDoubleRank; 2639 } 2640} 2641 2642/// getFloatingTypeOfSizeWithinDomain - Returns a real floating 2643/// point or a complex type (based on typeDomain/typeSize). 2644/// 'typeDomain' is a real floating point or complex type. 2645/// 'typeSize' is a real floating point or complex type. 2646QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size, 2647 QualType Domain) const { 2648 FloatingRank EltRank = getFloatingRank(Size); 2649 if (Domain->isComplexType()) { 2650 switch (EltRank) { 2651 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2652 case FloatRank: return FloatComplexTy; 2653 case DoubleRank: return DoubleComplexTy; 2654 case LongDoubleRank: return LongDoubleComplexTy; 2655 } 2656 } 2657 2658 assert(Domain->isRealFloatingType() && "Unknown domain!"); 2659 switch (EltRank) { 2660 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2661 case FloatRank: return FloatTy; 2662 case DoubleRank: return DoubleTy; 2663 case LongDoubleRank: return LongDoubleTy; 2664 } 2665} 2666 2667/// getFloatingTypeOrder - Compare the rank of the two specified floating 2668/// point types, ignoring the domain of the type (i.e. 'double' == 2669/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 2670/// LHS < RHS, return -1. 2671int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) { 2672 FloatingRank LHSR = getFloatingRank(LHS); 2673 FloatingRank RHSR = getFloatingRank(RHS); 2674 2675 if (LHSR == RHSR) 2676 return 0; 2677 if (LHSR > RHSR) 2678 return 1; 2679 return -1; 2680} 2681 2682/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This 2683/// routine will assert if passed a built-in type that isn't an integer or enum, 2684/// or if it is not canonicalized. 2685unsigned ASTContext::getIntegerRank(Type *T) { 2686 assert(T->isCanonicalUnqualified() && "T should be canonicalized"); 2687 if (EnumType* ET = dyn_cast<EnumType>(T)) 2688 T = ET->getDecl()->getPromotionType().getTypePtr(); 2689 2690 if (T->isSpecificBuiltinType(BuiltinType::WChar)) 2691 T = getFromTargetType(Target.getWCharType()).getTypePtr(); 2692 2693 if (T->isSpecificBuiltinType(BuiltinType::Char16)) 2694 T = getFromTargetType(Target.getChar16Type()).getTypePtr(); 2695 2696 if (T->isSpecificBuiltinType(BuiltinType::Char32)) 2697 T = getFromTargetType(Target.getChar32Type()).getTypePtr(); 2698 2699 switch (cast<BuiltinType>(T)->getKind()) { 2700 default: assert(0 && "getIntegerRank(): not a built-in integer"); 2701 case BuiltinType::Bool: 2702 return 1 + (getIntWidth(BoolTy) << 3); 2703 case BuiltinType::Char_S: 2704 case BuiltinType::Char_U: 2705 case BuiltinType::SChar: 2706 case BuiltinType::UChar: 2707 return 2 + (getIntWidth(CharTy) << 3); 2708 case BuiltinType::Short: 2709 case BuiltinType::UShort: 2710 return 3 + (getIntWidth(ShortTy) << 3); 2711 case BuiltinType::Int: 2712 case BuiltinType::UInt: 2713 return 4 + (getIntWidth(IntTy) << 3); 2714 case BuiltinType::Long: 2715 case BuiltinType::ULong: 2716 return 5 + (getIntWidth(LongTy) << 3); 2717 case BuiltinType::LongLong: 2718 case BuiltinType::ULongLong: 2719 return 6 + (getIntWidth(LongLongTy) << 3); 2720 case BuiltinType::Int128: 2721 case BuiltinType::UInt128: 2722 return 7 + (getIntWidth(Int128Ty) << 3); 2723 } 2724} 2725 2726/// \brief Whether this is a promotable bitfield reference according 2727/// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 2728/// 2729/// \returns the type this bit-field will promote to, or NULL if no 2730/// promotion occurs. 2731QualType ASTContext::isPromotableBitField(Expr *E) { 2732 FieldDecl *Field = E->getBitField(); 2733 if (!Field) 2734 return QualType(); 2735 2736 QualType FT = Field->getType(); 2737 2738 llvm::APSInt BitWidthAP = Field->getBitWidth()->EvaluateAsInt(*this); 2739 uint64_t BitWidth = BitWidthAP.getZExtValue(); 2740 uint64_t IntSize = getTypeSize(IntTy); 2741 // GCC extension compatibility: if the bit-field size is less than or equal 2742 // to the size of int, it gets promoted no matter what its type is. 2743 // For instance, unsigned long bf : 4 gets promoted to signed int. 2744 if (BitWidth < IntSize) 2745 return IntTy; 2746 2747 if (BitWidth == IntSize) 2748 return FT->isSignedIntegerType() ? IntTy : UnsignedIntTy; 2749 2750 // Types bigger than int are not subject to promotions, and therefore act 2751 // like the base type. 2752 // FIXME: This doesn't quite match what gcc does, but what gcc does here 2753 // is ridiculous. 2754 return QualType(); 2755} 2756 2757/// getPromotedIntegerType - Returns the type that Promotable will 2758/// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 2759/// integer type. 2760QualType ASTContext::getPromotedIntegerType(QualType Promotable) { 2761 assert(!Promotable.isNull()); 2762 assert(Promotable->isPromotableIntegerType()); 2763 if (const EnumType *ET = Promotable->getAs<EnumType>()) 2764 return ET->getDecl()->getPromotionType(); 2765 if (Promotable->isSignedIntegerType()) 2766 return IntTy; 2767 uint64_t PromotableSize = getTypeSize(Promotable); 2768 uint64_t IntSize = getTypeSize(IntTy); 2769 assert(Promotable->isUnsignedIntegerType() && PromotableSize <= IntSize); 2770 return (PromotableSize != IntSize) ? IntTy : UnsignedIntTy; 2771} 2772 2773/// getIntegerTypeOrder - Returns the highest ranked integer type: 2774/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 2775/// LHS < RHS, return -1. 2776int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) { 2777 Type *LHSC = getCanonicalType(LHS).getTypePtr(); 2778 Type *RHSC = getCanonicalType(RHS).getTypePtr(); 2779 if (LHSC == RHSC) return 0; 2780 2781 bool LHSUnsigned = LHSC->isUnsignedIntegerType(); 2782 bool RHSUnsigned = RHSC->isUnsignedIntegerType(); 2783 2784 unsigned LHSRank = getIntegerRank(LHSC); 2785 unsigned RHSRank = getIntegerRank(RHSC); 2786 2787 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned. 2788 if (LHSRank == RHSRank) return 0; 2789 return LHSRank > RHSRank ? 1 : -1; 2790 } 2791 2792 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa. 2793 if (LHSUnsigned) { 2794 // If the unsigned [LHS] type is larger, return it. 2795 if (LHSRank >= RHSRank) 2796 return 1; 2797 2798 // If the signed type can represent all values of the unsigned type, it 2799 // wins. Because we are dealing with 2's complement and types that are 2800 // powers of two larger than each other, this is always safe. 2801 return -1; 2802 } 2803 2804 // If the unsigned [RHS] type is larger, return it. 2805 if (RHSRank >= LHSRank) 2806 return -1; 2807 2808 // If the signed type can represent all values of the unsigned type, it 2809 // wins. Because we are dealing with 2's complement and types that are 2810 // powers of two larger than each other, this is always safe. 2811 return 1; 2812} 2813 2814static RecordDecl * 2815CreateRecordDecl(ASTContext &Ctx, RecordDecl::TagKind TK, DeclContext *DC, 2816 SourceLocation L, IdentifierInfo *Id) { 2817 if (Ctx.getLangOptions().CPlusPlus) 2818 return CXXRecordDecl::Create(Ctx, TK, DC, L, Id); 2819 else 2820 return RecordDecl::Create(Ctx, TK, DC, L, Id); 2821} 2822 2823// getCFConstantStringType - Return the type used for constant CFStrings. 2824QualType ASTContext::getCFConstantStringType() { 2825 if (!CFConstantStringTypeDecl) { 2826 CFConstantStringTypeDecl = 2827 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 2828 &Idents.get("NSConstantString")); 2829 CFConstantStringTypeDecl->startDefinition(); 2830 2831 QualType FieldTypes[4]; 2832 2833 // const int *isa; 2834 FieldTypes[0] = getPointerType(IntTy.withConst()); 2835 // int flags; 2836 FieldTypes[1] = IntTy; 2837 // const char *str; 2838 FieldTypes[2] = getPointerType(CharTy.withConst()); 2839 // long length; 2840 FieldTypes[3] = LongTy; 2841 2842 // Create fields 2843 for (unsigned i = 0; i < 4; ++i) { 2844 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl, 2845 SourceLocation(), 0, 2846 FieldTypes[i], /*TInfo=*/0, 2847 /*BitWidth=*/0, 2848 /*Mutable=*/false); 2849 Field->setAccess(AS_public); 2850 CFConstantStringTypeDecl->addDecl(Field); 2851 } 2852 2853 CFConstantStringTypeDecl->completeDefinition(); 2854 } 2855 2856 return getTagDeclType(CFConstantStringTypeDecl); 2857} 2858 2859void ASTContext::setCFConstantStringType(QualType T) { 2860 const RecordType *Rec = T->getAs<RecordType>(); 2861 assert(Rec && "Invalid CFConstantStringType"); 2862 CFConstantStringTypeDecl = Rec->getDecl(); 2863} 2864 2865// getNSConstantStringType - Return the type used for constant NSStrings. 2866QualType ASTContext::getNSConstantStringType() { 2867 if (!NSConstantStringTypeDecl) { 2868 NSConstantStringTypeDecl = 2869 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 2870 &Idents.get("__builtin_NSString")); 2871 NSConstantStringTypeDecl->startDefinition(); 2872 2873 QualType FieldTypes[3]; 2874 2875 // const int *isa; 2876 FieldTypes[0] = getPointerType(IntTy.withConst()); 2877 // const char *str; 2878 FieldTypes[1] = getPointerType(CharTy.withConst()); 2879 // unsigned int length; 2880 FieldTypes[2] = UnsignedIntTy; 2881 2882 // Create fields 2883 for (unsigned i = 0; i < 3; ++i) { 2884 FieldDecl *Field = FieldDecl::Create(*this, NSConstantStringTypeDecl, 2885 SourceLocation(), 0, 2886 FieldTypes[i], /*TInfo=*/0, 2887 /*BitWidth=*/0, 2888 /*Mutable=*/false); 2889 Field->setAccess(AS_public); 2890 NSConstantStringTypeDecl->addDecl(Field); 2891 } 2892 2893 NSConstantStringTypeDecl->completeDefinition(); 2894 } 2895 2896 return getTagDeclType(NSConstantStringTypeDecl); 2897} 2898 2899void ASTContext::setNSConstantStringType(QualType T) { 2900 const RecordType *Rec = T->getAs<RecordType>(); 2901 assert(Rec && "Invalid NSConstantStringType"); 2902 NSConstantStringTypeDecl = Rec->getDecl(); 2903} 2904 2905QualType ASTContext::getObjCFastEnumerationStateType() { 2906 if (!ObjCFastEnumerationStateTypeDecl) { 2907 ObjCFastEnumerationStateTypeDecl = 2908 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 2909 &Idents.get("__objcFastEnumerationState")); 2910 ObjCFastEnumerationStateTypeDecl->startDefinition(); 2911 2912 QualType FieldTypes[] = { 2913 UnsignedLongTy, 2914 getPointerType(ObjCIdTypedefType), 2915 getPointerType(UnsignedLongTy), 2916 getConstantArrayType(UnsignedLongTy, 2917 llvm::APInt(32, 5), ArrayType::Normal, 0) 2918 }; 2919 2920 for (size_t i = 0; i < 4; ++i) { 2921 FieldDecl *Field = FieldDecl::Create(*this, 2922 ObjCFastEnumerationStateTypeDecl, 2923 SourceLocation(), 0, 2924 FieldTypes[i], /*TInfo=*/0, 2925 /*BitWidth=*/0, 2926 /*Mutable=*/false); 2927 Field->setAccess(AS_public); 2928 ObjCFastEnumerationStateTypeDecl->addDecl(Field); 2929 } 2930 2931 ObjCFastEnumerationStateTypeDecl->completeDefinition(); 2932 } 2933 2934 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 2935} 2936 2937QualType ASTContext::getBlockDescriptorType() { 2938 if (BlockDescriptorType) 2939 return getTagDeclType(BlockDescriptorType); 2940 2941 RecordDecl *T; 2942 // FIXME: Needs the FlagAppleBlock bit. 2943 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 2944 &Idents.get("__block_descriptor")); 2945 T->startDefinition(); 2946 2947 QualType FieldTypes[] = { 2948 UnsignedLongTy, 2949 UnsignedLongTy, 2950 }; 2951 2952 const char *FieldNames[] = { 2953 "reserved", 2954 "Size" 2955 }; 2956 2957 for (size_t i = 0; i < 2; ++i) { 2958 FieldDecl *Field = FieldDecl::Create(*this, 2959 T, 2960 SourceLocation(), 2961 &Idents.get(FieldNames[i]), 2962 FieldTypes[i], /*TInfo=*/0, 2963 /*BitWidth=*/0, 2964 /*Mutable=*/false); 2965 Field->setAccess(AS_public); 2966 T->addDecl(Field); 2967 } 2968 2969 T->completeDefinition(); 2970 2971 BlockDescriptorType = T; 2972 2973 return getTagDeclType(BlockDescriptorType); 2974} 2975 2976void ASTContext::setBlockDescriptorType(QualType T) { 2977 const RecordType *Rec = T->getAs<RecordType>(); 2978 assert(Rec && "Invalid BlockDescriptorType"); 2979 BlockDescriptorType = Rec->getDecl(); 2980} 2981 2982QualType ASTContext::getBlockDescriptorExtendedType() { 2983 if (BlockDescriptorExtendedType) 2984 return getTagDeclType(BlockDescriptorExtendedType); 2985 2986 RecordDecl *T; 2987 // FIXME: Needs the FlagAppleBlock bit. 2988 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 2989 &Idents.get("__block_descriptor_withcopydispose")); 2990 T->startDefinition(); 2991 2992 QualType FieldTypes[] = { 2993 UnsignedLongTy, 2994 UnsignedLongTy, 2995 getPointerType(VoidPtrTy), 2996 getPointerType(VoidPtrTy) 2997 }; 2998 2999 const char *FieldNames[] = { 3000 "reserved", 3001 "Size", 3002 "CopyFuncPtr", 3003 "DestroyFuncPtr" 3004 }; 3005 3006 for (size_t i = 0; i < 4; ++i) { 3007 FieldDecl *Field = FieldDecl::Create(*this, 3008 T, 3009 SourceLocation(), 3010 &Idents.get(FieldNames[i]), 3011 FieldTypes[i], /*TInfo=*/0, 3012 /*BitWidth=*/0, 3013 /*Mutable=*/false); 3014 Field->setAccess(AS_public); 3015 T->addDecl(Field); 3016 } 3017 3018 T->completeDefinition(); 3019 3020 BlockDescriptorExtendedType = T; 3021 3022 return getTagDeclType(BlockDescriptorExtendedType); 3023} 3024 3025void ASTContext::setBlockDescriptorExtendedType(QualType T) { 3026 const RecordType *Rec = T->getAs<RecordType>(); 3027 assert(Rec && "Invalid BlockDescriptorType"); 3028 BlockDescriptorExtendedType = Rec->getDecl(); 3029} 3030 3031bool ASTContext::BlockRequiresCopying(QualType Ty) { 3032 if (Ty->isBlockPointerType()) 3033 return true; 3034 if (isObjCNSObjectType(Ty)) 3035 return true; 3036 if (Ty->isObjCObjectPointerType()) 3037 return true; 3038 return false; 3039} 3040 3041QualType ASTContext::BuildByRefType(const char *DeclName, QualType Ty) { 3042 // type = struct __Block_byref_1_X { 3043 // void *__isa; 3044 // struct __Block_byref_1_X *__forwarding; 3045 // unsigned int __flags; 3046 // unsigned int __size; 3047 // void *__copy_helper; // as needed 3048 // void *__destroy_help // as needed 3049 // int X; 3050 // } * 3051 3052 bool HasCopyAndDispose = BlockRequiresCopying(Ty); 3053 3054 // FIXME: Move up 3055 static unsigned int UniqueBlockByRefTypeID = 0; 3056 llvm::SmallString<36> Name; 3057 llvm::raw_svector_ostream(Name) << "__Block_byref_" << 3058 ++UniqueBlockByRefTypeID << '_' << DeclName; 3059 RecordDecl *T; 3060 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3061 &Idents.get(Name.str())); 3062 T->startDefinition(); 3063 QualType Int32Ty = IntTy; 3064 assert(getIntWidth(IntTy) == 32 && "non-32bit int not supported"); 3065 QualType FieldTypes[] = { 3066 getPointerType(VoidPtrTy), 3067 getPointerType(getTagDeclType(T)), 3068 Int32Ty, 3069 Int32Ty, 3070 getPointerType(VoidPtrTy), 3071 getPointerType(VoidPtrTy), 3072 Ty 3073 }; 3074 3075 const char *FieldNames[] = { 3076 "__isa", 3077 "__forwarding", 3078 "__flags", 3079 "__size", 3080 "__copy_helper", 3081 "__destroy_helper", 3082 DeclName, 3083 }; 3084 3085 for (size_t i = 0; i < 7; ++i) { 3086 if (!HasCopyAndDispose && i >=4 && i <= 5) 3087 continue; 3088 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3089 &Idents.get(FieldNames[i]), 3090 FieldTypes[i], /*TInfo=*/0, 3091 /*BitWidth=*/0, /*Mutable=*/false); 3092 Field->setAccess(AS_public); 3093 T->addDecl(Field); 3094 } 3095 3096 T->completeDefinition(); 3097 3098 return getPointerType(getTagDeclType(T)); 3099} 3100 3101 3102QualType ASTContext::getBlockParmType( 3103 bool BlockHasCopyDispose, 3104 llvm::SmallVectorImpl<const Expr *> &Layout) { 3105 3106 // FIXME: Move up 3107 static unsigned int UniqueBlockParmTypeID = 0; 3108 llvm::SmallString<36> Name; 3109 llvm::raw_svector_ostream(Name) << "__block_literal_" 3110 << ++UniqueBlockParmTypeID; 3111 RecordDecl *T; 3112 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3113 &Idents.get(Name.str())); 3114 T->startDefinition(); 3115 QualType FieldTypes[] = { 3116 getPointerType(VoidPtrTy), 3117 IntTy, 3118 IntTy, 3119 getPointerType(VoidPtrTy), 3120 (BlockHasCopyDispose ? 3121 getPointerType(getBlockDescriptorExtendedType()) : 3122 getPointerType(getBlockDescriptorType())) 3123 }; 3124 3125 const char *FieldNames[] = { 3126 "__isa", 3127 "__flags", 3128 "__reserved", 3129 "__FuncPtr", 3130 "__descriptor" 3131 }; 3132 3133 for (size_t i = 0; i < 5; ++i) { 3134 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3135 &Idents.get(FieldNames[i]), 3136 FieldTypes[i], /*TInfo=*/0, 3137 /*BitWidth=*/0, /*Mutable=*/false); 3138 Field->setAccess(AS_public); 3139 T->addDecl(Field); 3140 } 3141 3142 for (unsigned i = 0; i < Layout.size(); ++i) { 3143 const Expr *E = Layout[i]; 3144 3145 QualType FieldType = E->getType(); 3146 IdentifierInfo *FieldName = 0; 3147 if (isa<CXXThisExpr>(E)) { 3148 FieldName = &Idents.get("this"); 3149 } else if (const BlockDeclRefExpr *BDRE = dyn_cast<BlockDeclRefExpr>(E)) { 3150 const ValueDecl *D = BDRE->getDecl(); 3151 FieldName = D->getIdentifier(); 3152 if (BDRE->isByRef()) 3153 FieldType = BuildByRefType(D->getNameAsCString(), FieldType); 3154 } else { 3155 // Padding. 3156 assert(isa<ConstantArrayType>(FieldType) && 3157 isa<DeclRefExpr>(E) && 3158 !cast<DeclRefExpr>(E)->getDecl()->getDeclName() && 3159 "doesn't match characteristics of padding decl"); 3160 } 3161 3162 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3163 FieldName, FieldType, /*TInfo=*/0, 3164 /*BitWidth=*/0, /*Mutable=*/false); 3165 Field->setAccess(AS_public); 3166 T->addDecl(Field); 3167 } 3168 3169 T->completeDefinition(); 3170 3171 return getPointerType(getTagDeclType(T)); 3172} 3173 3174void ASTContext::setObjCFastEnumerationStateType(QualType T) { 3175 const RecordType *Rec = T->getAs<RecordType>(); 3176 assert(Rec && "Invalid ObjCFAstEnumerationStateType"); 3177 ObjCFastEnumerationStateTypeDecl = Rec->getDecl(); 3178} 3179 3180// This returns true if a type has been typedefed to BOOL: 3181// typedef <type> BOOL; 3182static bool isTypeTypedefedAsBOOL(QualType T) { 3183 if (const TypedefType *TT = dyn_cast<TypedefType>(T)) 3184 if (IdentifierInfo *II = TT->getDecl()->getIdentifier()) 3185 return II->isStr("BOOL"); 3186 3187 return false; 3188} 3189 3190/// getObjCEncodingTypeSize returns size of type for objective-c encoding 3191/// purpose. 3192CharUnits ASTContext::getObjCEncodingTypeSize(QualType type) { 3193 CharUnits sz = getTypeSizeInChars(type); 3194 3195 // Make all integer and enum types at least as large as an int 3196 if (sz.isPositive() && type->isIntegralType()) 3197 sz = std::max(sz, getTypeSizeInChars(IntTy)); 3198 // Treat arrays as pointers, since that's how they're passed in. 3199 else if (type->isArrayType()) 3200 sz = getTypeSizeInChars(VoidPtrTy); 3201 return sz; 3202} 3203 3204static inline 3205std::string charUnitsToString(const CharUnits &CU) { 3206 return llvm::itostr(CU.getQuantity()); 3207} 3208 3209/// getObjCEncodingForBlockDecl - Return the encoded type for this block 3210/// declaration. 3211void ASTContext::getObjCEncodingForBlock(const BlockExpr *Expr, 3212 std::string& S) { 3213 const BlockDecl *Decl = Expr->getBlockDecl(); 3214 QualType BlockTy = 3215 Expr->getType()->getAs<BlockPointerType>()->getPointeeType(); 3216 // Encode result type. 3217 getObjCEncodingForType(cast<FunctionType>(BlockTy)->getResultType(), S); 3218 // Compute size of all parameters. 3219 // Start with computing size of a pointer in number of bytes. 3220 // FIXME: There might(should) be a better way of doing this computation! 3221 SourceLocation Loc; 3222 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3223 CharUnits ParmOffset = PtrSize; 3224 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), 3225 E = Decl->param_end(); PI != E; ++PI) { 3226 QualType PType = (*PI)->getType(); 3227 CharUnits sz = getObjCEncodingTypeSize(PType); 3228 assert (sz.isPositive() && "BlockExpr - Incomplete param type"); 3229 ParmOffset += sz; 3230 } 3231 // Size of the argument frame 3232 S += charUnitsToString(ParmOffset); 3233 // Block pointer and offset. 3234 S += "@?0"; 3235 ParmOffset = PtrSize; 3236 3237 // Argument types. 3238 ParmOffset = PtrSize; 3239 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), E = 3240 Decl->param_end(); PI != E; ++PI) { 3241 ParmVarDecl *PVDecl = *PI; 3242 QualType PType = PVDecl->getOriginalType(); 3243 if (const ArrayType *AT = 3244 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3245 // Use array's original type only if it has known number of 3246 // elements. 3247 if (!isa<ConstantArrayType>(AT)) 3248 PType = PVDecl->getType(); 3249 } else if (PType->isFunctionType()) 3250 PType = PVDecl->getType(); 3251 getObjCEncodingForType(PType, S); 3252 S += charUnitsToString(ParmOffset); 3253 ParmOffset += getObjCEncodingTypeSize(PType); 3254 } 3255} 3256 3257/// getObjCEncodingForMethodDecl - Return the encoded type for this method 3258/// declaration. 3259void ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, 3260 std::string& S) { 3261 // FIXME: This is not very efficient. 3262 // Encode type qualifer, 'in', 'inout', etc. for the return type. 3263 getObjCEncodingForTypeQualifier(Decl->getObjCDeclQualifier(), S); 3264 // Encode result type. 3265 getObjCEncodingForType(Decl->getResultType(), S); 3266 // Compute size of all parameters. 3267 // Start with computing size of a pointer in number of bytes. 3268 // FIXME: There might(should) be a better way of doing this computation! 3269 SourceLocation Loc; 3270 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3271 // The first two arguments (self and _cmd) are pointers; account for 3272 // their size. 3273 CharUnits ParmOffset = 2 * PtrSize; 3274 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3275 E = Decl->sel_param_end(); PI != E; ++PI) { 3276 QualType PType = (*PI)->getType(); 3277 CharUnits sz = getObjCEncodingTypeSize(PType); 3278 assert (sz.isPositive() && 3279 "getObjCEncodingForMethodDecl - Incomplete param type"); 3280 ParmOffset += sz; 3281 } 3282 S += charUnitsToString(ParmOffset); 3283 S += "@0:"; 3284 S += charUnitsToString(PtrSize); 3285 3286 // Argument types. 3287 ParmOffset = 2 * PtrSize; 3288 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3289 E = Decl->sel_param_end(); PI != E; ++PI) { 3290 ParmVarDecl *PVDecl = *PI; 3291 QualType PType = PVDecl->getOriginalType(); 3292 if (const ArrayType *AT = 3293 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3294 // Use array's original type only if it has known number of 3295 // elements. 3296 if (!isa<ConstantArrayType>(AT)) 3297 PType = PVDecl->getType(); 3298 } else if (PType->isFunctionType()) 3299 PType = PVDecl->getType(); 3300 // Process argument qualifiers for user supplied arguments; such as, 3301 // 'in', 'inout', etc. 3302 getObjCEncodingForTypeQualifier(PVDecl->getObjCDeclQualifier(), S); 3303 getObjCEncodingForType(PType, S); 3304 S += charUnitsToString(ParmOffset); 3305 ParmOffset += getObjCEncodingTypeSize(PType); 3306 } 3307} 3308 3309/// getObjCEncodingForPropertyDecl - Return the encoded type for this 3310/// property declaration. If non-NULL, Container must be either an 3311/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be 3312/// NULL when getting encodings for protocol properties. 3313/// Property attributes are stored as a comma-delimited C string. The simple 3314/// attributes readonly and bycopy are encoded as single characters. The 3315/// parametrized attributes, getter=name, setter=name, and ivar=name, are 3316/// encoded as single characters, followed by an identifier. Property types 3317/// are also encoded as a parametrized attribute. The characters used to encode 3318/// these attributes are defined by the following enumeration: 3319/// @code 3320/// enum PropertyAttributes { 3321/// kPropertyReadOnly = 'R', // property is read-only. 3322/// kPropertyBycopy = 'C', // property is a copy of the value last assigned 3323/// kPropertyByref = '&', // property is a reference to the value last assigned 3324/// kPropertyDynamic = 'D', // property is dynamic 3325/// kPropertyGetter = 'G', // followed by getter selector name 3326/// kPropertySetter = 'S', // followed by setter selector name 3327/// kPropertyInstanceVariable = 'V' // followed by instance variable name 3328/// kPropertyType = 't' // followed by old-style type encoding. 3329/// kPropertyWeak = 'W' // 'weak' property 3330/// kPropertyStrong = 'P' // property GC'able 3331/// kPropertyNonAtomic = 'N' // property non-atomic 3332/// }; 3333/// @endcode 3334void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 3335 const Decl *Container, 3336 std::string& S) { 3337 // Collect information from the property implementation decl(s). 3338 bool Dynamic = false; 3339 ObjCPropertyImplDecl *SynthesizePID = 0; 3340 3341 // FIXME: Duplicated code due to poor abstraction. 3342 if (Container) { 3343 if (const ObjCCategoryImplDecl *CID = 3344 dyn_cast<ObjCCategoryImplDecl>(Container)) { 3345 for (ObjCCategoryImplDecl::propimpl_iterator 3346 i = CID->propimpl_begin(), e = CID->propimpl_end(); 3347 i != e; ++i) { 3348 ObjCPropertyImplDecl *PID = *i; 3349 if (PID->getPropertyDecl() == PD) { 3350 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3351 Dynamic = true; 3352 } else { 3353 SynthesizePID = PID; 3354 } 3355 } 3356 } 3357 } else { 3358 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container); 3359 for (ObjCCategoryImplDecl::propimpl_iterator 3360 i = OID->propimpl_begin(), e = OID->propimpl_end(); 3361 i != e; ++i) { 3362 ObjCPropertyImplDecl *PID = *i; 3363 if (PID->getPropertyDecl() == PD) { 3364 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3365 Dynamic = true; 3366 } else { 3367 SynthesizePID = PID; 3368 } 3369 } 3370 } 3371 } 3372 } 3373 3374 // FIXME: This is not very efficient. 3375 S = "T"; 3376 3377 // Encode result type. 3378 // GCC has some special rules regarding encoding of properties which 3379 // closely resembles encoding of ivars. 3380 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, 0, 3381 true /* outermost type */, 3382 true /* encoding for property */); 3383 3384 if (PD->isReadOnly()) { 3385 S += ",R"; 3386 } else { 3387 switch (PD->getSetterKind()) { 3388 case ObjCPropertyDecl::Assign: break; 3389 case ObjCPropertyDecl::Copy: S += ",C"; break; 3390 case ObjCPropertyDecl::Retain: S += ",&"; break; 3391 } 3392 } 3393 3394 // It really isn't clear at all what this means, since properties 3395 // are "dynamic by default". 3396 if (Dynamic) 3397 S += ",D"; 3398 3399 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) 3400 S += ",N"; 3401 3402 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) { 3403 S += ",G"; 3404 S += PD->getGetterName().getAsString(); 3405 } 3406 3407 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) { 3408 S += ",S"; 3409 S += PD->getSetterName().getAsString(); 3410 } 3411 3412 if (SynthesizePID) { 3413 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl(); 3414 S += ",V"; 3415 S += OID->getNameAsString(); 3416 } 3417 3418 // FIXME: OBJCGC: weak & strong 3419} 3420 3421/// getLegacyIntegralTypeEncoding - 3422/// Another legacy compatibility encoding: 32-bit longs are encoded as 3423/// 'l' or 'L' , but not always. For typedefs, we need to use 3424/// 'i' or 'I' instead if encoding a struct field, or a pointer! 3425/// 3426void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const { 3427 if (isa<TypedefType>(PointeeTy.getTypePtr())) { 3428 if (const BuiltinType *BT = PointeeTy->getAs<BuiltinType>()) { 3429 if (BT->getKind() == BuiltinType::ULong && 3430 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3431 PointeeTy = UnsignedIntTy; 3432 else 3433 if (BT->getKind() == BuiltinType::Long && 3434 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3435 PointeeTy = IntTy; 3436 } 3437 } 3438} 3439 3440void ASTContext::getObjCEncodingForType(QualType T, std::string& S, 3441 const FieldDecl *Field) { 3442 // We follow the behavior of gcc, expanding structures which are 3443 // directly pointed to, and expanding embedded structures. Note that 3444 // these rules are sufficient to prevent recursive encoding of the 3445 // same type. 3446 getObjCEncodingForTypeImpl(T, S, true, true, Field, 3447 true /* outermost type */); 3448} 3449 3450static void EncodeBitField(const ASTContext *Context, std::string& S, 3451 const FieldDecl *FD) { 3452 const Expr *E = FD->getBitWidth(); 3453 assert(E && "bitfield width not there - getObjCEncodingForTypeImpl"); 3454 ASTContext *Ctx = const_cast<ASTContext*>(Context); 3455 unsigned N = E->EvaluateAsInt(*Ctx).getZExtValue(); 3456 S += 'b'; 3457 S += llvm::utostr(N); 3458} 3459 3460// FIXME: Use SmallString for accumulating string. 3461void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S, 3462 bool ExpandPointedToStructures, 3463 bool ExpandStructures, 3464 const FieldDecl *FD, 3465 bool OutermostType, 3466 bool EncodingProperty) { 3467 if (const BuiltinType *BT = T->getAs<BuiltinType>()) { 3468 if (FD && FD->isBitField()) 3469 return EncodeBitField(this, S, FD); 3470 char encoding; 3471 switch (BT->getKind()) { 3472 default: assert(0 && "Unhandled builtin type kind"); 3473 case BuiltinType::Void: encoding = 'v'; break; 3474 case BuiltinType::Bool: encoding = 'B'; break; 3475 case BuiltinType::Char_U: 3476 case BuiltinType::UChar: encoding = 'C'; break; 3477 case BuiltinType::UShort: encoding = 'S'; break; 3478 case BuiltinType::UInt: encoding = 'I'; break; 3479 case BuiltinType::ULong: 3480 encoding = 3481 (const_cast<ASTContext *>(this))->getIntWidth(T) == 32 ? 'L' : 'Q'; 3482 break; 3483 case BuiltinType::UInt128: encoding = 'T'; break; 3484 case BuiltinType::ULongLong: encoding = 'Q'; break; 3485 case BuiltinType::Char_S: 3486 case BuiltinType::SChar: encoding = 'c'; break; 3487 case BuiltinType::Short: encoding = 's'; break; 3488 case BuiltinType::Int: encoding = 'i'; break; 3489 case BuiltinType::Long: 3490 encoding = 3491 (const_cast<ASTContext *>(this))->getIntWidth(T) == 32 ? 'l' : 'q'; 3492 break; 3493 case BuiltinType::LongLong: encoding = 'q'; break; 3494 case BuiltinType::Int128: encoding = 't'; break; 3495 case BuiltinType::Float: encoding = 'f'; break; 3496 case BuiltinType::Double: encoding = 'd'; break; 3497 case BuiltinType::LongDouble: encoding = 'd'; break; 3498 } 3499 3500 S += encoding; 3501 return; 3502 } 3503 3504 if (const ComplexType *CT = T->getAs<ComplexType>()) { 3505 S += 'j'; 3506 getObjCEncodingForTypeImpl(CT->getElementType(), S, false, false, 0, false, 3507 false); 3508 return; 3509 } 3510 3511 // encoding for pointer or r3eference types. 3512 QualType PointeeTy; 3513 if (const PointerType *PT = T->getAs<PointerType>()) { 3514 if (PT->isObjCSelType()) { 3515 S += ':'; 3516 return; 3517 } 3518 PointeeTy = PT->getPointeeType(); 3519 } 3520 else if (const ReferenceType *RT = T->getAs<ReferenceType>()) 3521 PointeeTy = RT->getPointeeType(); 3522 if (!PointeeTy.isNull()) { 3523 bool isReadOnly = false; 3524 // For historical/compatibility reasons, the read-only qualifier of the 3525 // pointee gets emitted _before_ the '^'. The read-only qualifier of 3526 // the pointer itself gets ignored, _unless_ we are looking at a typedef! 3527 // Also, do not emit the 'r' for anything but the outermost type! 3528 if (isa<TypedefType>(T.getTypePtr())) { 3529 if (OutermostType && T.isConstQualified()) { 3530 isReadOnly = true; 3531 S += 'r'; 3532 } 3533 } else if (OutermostType) { 3534 QualType P = PointeeTy; 3535 while (P->getAs<PointerType>()) 3536 P = P->getAs<PointerType>()->getPointeeType(); 3537 if (P.isConstQualified()) { 3538 isReadOnly = true; 3539 S += 'r'; 3540 } 3541 } 3542 if (isReadOnly) { 3543 // Another legacy compatibility encoding. Some ObjC qualifier and type 3544 // combinations need to be rearranged. 3545 // Rewrite "in const" from "nr" to "rn" 3546 if (llvm::StringRef(S).endswith("nr")) 3547 S.replace(S.end()-2, S.end(), "rn"); 3548 } 3549 3550 if (PointeeTy->isCharType()) { 3551 // char pointer types should be encoded as '*' unless it is a 3552 // type that has been typedef'd to 'BOOL'. 3553 if (!isTypeTypedefedAsBOOL(PointeeTy)) { 3554 S += '*'; 3555 return; 3556 } 3557 } else if (const RecordType *RTy = PointeeTy->getAs<RecordType>()) { 3558 // GCC binary compat: Need to convert "struct objc_class *" to "#". 3559 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_class")) { 3560 S += '#'; 3561 return; 3562 } 3563 // GCC binary compat: Need to convert "struct objc_object *" to "@". 3564 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_object")) { 3565 S += '@'; 3566 return; 3567 } 3568 // fall through... 3569 } 3570 S += '^'; 3571 getLegacyIntegralTypeEncoding(PointeeTy); 3572 3573 getObjCEncodingForTypeImpl(PointeeTy, S, false, ExpandPointedToStructures, 3574 NULL); 3575 return; 3576 } 3577 3578 if (const ArrayType *AT = 3579 // Ignore type qualifiers etc. 3580 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) { 3581 if (isa<IncompleteArrayType>(AT)) { 3582 // Incomplete arrays are encoded as a pointer to the array element. 3583 S += '^'; 3584 3585 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3586 false, ExpandStructures, FD); 3587 } else { 3588 S += '['; 3589 3590 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 3591 S += llvm::utostr(CAT->getSize().getZExtValue()); 3592 else { 3593 //Variable length arrays are encoded as a regular array with 0 elements. 3594 assert(isa<VariableArrayType>(AT) && "Unknown array type!"); 3595 S += '0'; 3596 } 3597 3598 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3599 false, ExpandStructures, FD); 3600 S += ']'; 3601 } 3602 return; 3603 } 3604 3605 if (T->getAs<FunctionType>()) { 3606 S += '?'; 3607 return; 3608 } 3609 3610 if (const RecordType *RTy = T->getAs<RecordType>()) { 3611 RecordDecl *RDecl = RTy->getDecl(); 3612 S += RDecl->isUnion() ? '(' : '{'; 3613 // Anonymous structures print as '?' 3614 if (const IdentifierInfo *II = RDecl->getIdentifier()) { 3615 S += II->getName(); 3616 if (ClassTemplateSpecializationDecl *Spec 3617 = dyn_cast<ClassTemplateSpecializationDecl>(RDecl)) { 3618 const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs(); 3619 std::string TemplateArgsStr 3620 = TemplateSpecializationType::PrintTemplateArgumentList( 3621 TemplateArgs.getFlatArgumentList(), 3622 TemplateArgs.flat_size(), 3623 (*this).PrintingPolicy); 3624 3625 S += TemplateArgsStr; 3626 } 3627 } else { 3628 S += '?'; 3629 } 3630 if (ExpandStructures) { 3631 S += '='; 3632 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 3633 FieldEnd = RDecl->field_end(); 3634 Field != FieldEnd; ++Field) { 3635 if (FD) { 3636 S += '"'; 3637 S += Field->getNameAsString(); 3638 S += '"'; 3639 } 3640 3641 // Special case bit-fields. 3642 if (Field->isBitField()) { 3643 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, 3644 (*Field)); 3645 } else { 3646 QualType qt = Field->getType(); 3647 getLegacyIntegralTypeEncoding(qt); 3648 getObjCEncodingForTypeImpl(qt, S, false, true, 3649 FD); 3650 } 3651 } 3652 } 3653 S += RDecl->isUnion() ? ')' : '}'; 3654 return; 3655 } 3656 3657 if (T->isEnumeralType()) { 3658 if (FD && FD->isBitField()) 3659 EncodeBitField(this, S, FD); 3660 else 3661 S += 'i'; 3662 return; 3663 } 3664 3665 if (T->isBlockPointerType()) { 3666 S += "@?"; // Unlike a pointer-to-function, which is "^?". 3667 return; 3668 } 3669 3670 // Ignore protocol qualifiers when mangling at this level. 3671 if (const ObjCObjectType *OT = T->getAs<ObjCObjectType>()) 3672 T = OT->getBaseType(); 3673 3674 if (const ObjCInterfaceType *OIT = T->getAs<ObjCInterfaceType>()) { 3675 // @encode(class_name) 3676 ObjCInterfaceDecl *OI = OIT->getDecl(); 3677 S += '{'; 3678 const IdentifierInfo *II = OI->getIdentifier(); 3679 S += II->getName(); 3680 S += '='; 3681 llvm::SmallVector<FieldDecl*, 32> RecFields; 3682 CollectObjCIvars(OI, RecFields); 3683 for (unsigned i = 0, e = RecFields.size(); i != e; ++i) { 3684 if (RecFields[i]->isBitField()) 3685 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 3686 RecFields[i]); 3687 else 3688 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 3689 FD); 3690 } 3691 S += '}'; 3692 return; 3693 } 3694 3695 if (const ObjCObjectPointerType *OPT = T->getAs<ObjCObjectPointerType>()) { 3696 if (OPT->isObjCIdType()) { 3697 S += '@'; 3698 return; 3699 } 3700 3701 if (OPT->isObjCClassType() || OPT->isObjCQualifiedClassType()) { 3702 // FIXME: Consider if we need to output qualifiers for 'Class<p>'. 3703 // Since this is a binary compatibility issue, need to consult with runtime 3704 // folks. Fortunately, this is a *very* obsure construct. 3705 S += '#'; 3706 return; 3707 } 3708 3709 if (OPT->isObjCQualifiedIdType()) { 3710 getObjCEncodingForTypeImpl(getObjCIdType(), S, 3711 ExpandPointedToStructures, 3712 ExpandStructures, FD); 3713 if (FD || EncodingProperty) { 3714 // Note that we do extended encoding of protocol qualifer list 3715 // Only when doing ivar or property encoding. 3716 S += '"'; 3717 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 3718 E = OPT->qual_end(); I != E; ++I) { 3719 S += '<'; 3720 S += (*I)->getNameAsString(); 3721 S += '>'; 3722 } 3723 S += '"'; 3724 } 3725 return; 3726 } 3727 3728 QualType PointeeTy = OPT->getPointeeType(); 3729 if (!EncodingProperty && 3730 isa<TypedefType>(PointeeTy.getTypePtr())) { 3731 // Another historical/compatibility reason. 3732 // We encode the underlying type which comes out as 3733 // {...}; 3734 S += '^'; 3735 getObjCEncodingForTypeImpl(PointeeTy, S, 3736 false, ExpandPointedToStructures, 3737 NULL); 3738 return; 3739 } 3740 3741 S += '@'; 3742 if (OPT->getInterfaceDecl() && (FD || EncodingProperty)) { 3743 S += '"'; 3744 S += OPT->getInterfaceDecl()->getIdentifier()->getName(); 3745 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 3746 E = OPT->qual_end(); I != E; ++I) { 3747 S += '<'; 3748 S += (*I)->getNameAsString(); 3749 S += '>'; 3750 } 3751 S += '"'; 3752 } 3753 return; 3754 } 3755 3756 // gcc just blithely ignores member pointers. 3757 // TODO: maybe there should be a mangling for these 3758 if (T->getAs<MemberPointerType>()) 3759 return; 3760 3761 assert(0 && "@encode for type not implemented!"); 3762} 3763 3764void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 3765 std::string& S) const { 3766 if (QT & Decl::OBJC_TQ_In) 3767 S += 'n'; 3768 if (QT & Decl::OBJC_TQ_Inout) 3769 S += 'N'; 3770 if (QT & Decl::OBJC_TQ_Out) 3771 S += 'o'; 3772 if (QT & Decl::OBJC_TQ_Bycopy) 3773 S += 'O'; 3774 if (QT & Decl::OBJC_TQ_Byref) 3775 S += 'R'; 3776 if (QT & Decl::OBJC_TQ_Oneway) 3777 S += 'V'; 3778} 3779 3780void ASTContext::setBuiltinVaListType(QualType T) { 3781 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!"); 3782 3783 BuiltinVaListType = T; 3784} 3785 3786void ASTContext::setObjCIdType(QualType T) { 3787 ObjCIdTypedefType = T; 3788} 3789 3790void ASTContext::setObjCSelType(QualType T) { 3791 ObjCSelTypedefType = T; 3792} 3793 3794void ASTContext::setObjCProtoType(QualType QT) { 3795 ObjCProtoType = QT; 3796} 3797 3798void ASTContext::setObjCClassType(QualType T) { 3799 ObjCClassTypedefType = T; 3800} 3801 3802void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) { 3803 assert(ObjCConstantStringType.isNull() && 3804 "'NSConstantString' type already set!"); 3805 3806 ObjCConstantStringType = getObjCInterfaceType(Decl); 3807} 3808 3809/// \brief Retrieve the template name that corresponds to a non-empty 3810/// lookup. 3811TemplateName ASTContext::getOverloadedTemplateName(UnresolvedSetIterator Begin, 3812 UnresolvedSetIterator End) { 3813 unsigned size = End - Begin; 3814 assert(size > 1 && "set is not overloaded!"); 3815 3816 void *memory = Allocate(sizeof(OverloadedTemplateStorage) + 3817 size * sizeof(FunctionTemplateDecl*)); 3818 OverloadedTemplateStorage *OT = new(memory) OverloadedTemplateStorage(size); 3819 3820 NamedDecl **Storage = OT->getStorage(); 3821 for (UnresolvedSetIterator I = Begin; I != End; ++I) { 3822 NamedDecl *D = *I; 3823 assert(isa<FunctionTemplateDecl>(D) || 3824 (isa<UsingShadowDecl>(D) && 3825 isa<FunctionTemplateDecl>(D->getUnderlyingDecl()))); 3826 *Storage++ = D; 3827 } 3828 3829 return TemplateName(OT); 3830} 3831 3832/// \brief Retrieve the template name that represents a qualified 3833/// template name such as \c std::vector. 3834TemplateName ASTContext::getQualifiedTemplateName(NestedNameSpecifier *NNS, 3835 bool TemplateKeyword, 3836 TemplateDecl *Template) { 3837 // FIXME: Canonicalization? 3838 llvm::FoldingSetNodeID ID; 3839 QualifiedTemplateName::Profile(ID, NNS, TemplateKeyword, Template); 3840 3841 void *InsertPos = 0; 3842 QualifiedTemplateName *QTN = 3843 QualifiedTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3844 if (!QTN) { 3845 QTN = new (*this,4) QualifiedTemplateName(NNS, TemplateKeyword, Template); 3846 QualifiedTemplateNames.InsertNode(QTN, InsertPos); 3847 } 3848 3849 return TemplateName(QTN); 3850} 3851 3852/// \brief Retrieve the template name that represents a dependent 3853/// template name such as \c MetaFun::template apply. 3854TemplateName ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 3855 const IdentifierInfo *Name) { 3856 assert((!NNS || NNS->isDependent()) && 3857 "Nested name specifier must be dependent"); 3858 3859 llvm::FoldingSetNodeID ID; 3860 DependentTemplateName::Profile(ID, NNS, Name); 3861 3862 void *InsertPos = 0; 3863 DependentTemplateName *QTN = 3864 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3865 3866 if (QTN) 3867 return TemplateName(QTN); 3868 3869 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 3870 if (CanonNNS == NNS) { 3871 QTN = new (*this,4) DependentTemplateName(NNS, Name); 3872 } else { 3873 TemplateName Canon = getDependentTemplateName(CanonNNS, Name); 3874 QTN = new (*this,4) DependentTemplateName(NNS, Name, Canon); 3875 DependentTemplateName *CheckQTN = 3876 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3877 assert(!CheckQTN && "Dependent type name canonicalization broken"); 3878 (void)CheckQTN; 3879 } 3880 3881 DependentTemplateNames.InsertNode(QTN, InsertPos); 3882 return TemplateName(QTN); 3883} 3884 3885/// \brief Retrieve the template name that represents a dependent 3886/// template name such as \c MetaFun::template operator+. 3887TemplateName 3888ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 3889 OverloadedOperatorKind Operator) { 3890 assert((!NNS || NNS->isDependent()) && 3891 "Nested name specifier must be dependent"); 3892 3893 llvm::FoldingSetNodeID ID; 3894 DependentTemplateName::Profile(ID, NNS, Operator); 3895 3896 void *InsertPos = 0; 3897 DependentTemplateName *QTN 3898 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3899 3900 if (QTN) 3901 return TemplateName(QTN); 3902 3903 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 3904 if (CanonNNS == NNS) { 3905 QTN = new (*this,4) DependentTemplateName(NNS, Operator); 3906 } else { 3907 TemplateName Canon = getDependentTemplateName(CanonNNS, Operator); 3908 QTN = new (*this,4) DependentTemplateName(NNS, Operator, Canon); 3909 3910 DependentTemplateName *CheckQTN 3911 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3912 assert(!CheckQTN && "Dependent template name canonicalization broken"); 3913 (void)CheckQTN; 3914 } 3915 3916 DependentTemplateNames.InsertNode(QTN, InsertPos); 3917 return TemplateName(QTN); 3918} 3919 3920/// getFromTargetType - Given one of the integer types provided by 3921/// TargetInfo, produce the corresponding type. The unsigned @p Type 3922/// is actually a value of type @c TargetInfo::IntType. 3923CanQualType ASTContext::getFromTargetType(unsigned Type) const { 3924 switch (Type) { 3925 case TargetInfo::NoInt: return CanQualType(); 3926 case TargetInfo::SignedShort: return ShortTy; 3927 case TargetInfo::UnsignedShort: return UnsignedShortTy; 3928 case TargetInfo::SignedInt: return IntTy; 3929 case TargetInfo::UnsignedInt: return UnsignedIntTy; 3930 case TargetInfo::SignedLong: return LongTy; 3931 case TargetInfo::UnsignedLong: return UnsignedLongTy; 3932 case TargetInfo::SignedLongLong: return LongLongTy; 3933 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy; 3934 } 3935 3936 assert(false && "Unhandled TargetInfo::IntType value"); 3937 return CanQualType(); 3938} 3939 3940//===----------------------------------------------------------------------===// 3941// Type Predicates. 3942//===----------------------------------------------------------------------===// 3943 3944/// isObjCNSObjectType - Return true if this is an NSObject object using 3945/// NSObject attribute on a c-style pointer type. 3946/// FIXME - Make it work directly on types. 3947/// FIXME: Move to Type. 3948/// 3949bool ASTContext::isObjCNSObjectType(QualType Ty) const { 3950 if (TypedefType *TDT = dyn_cast<TypedefType>(Ty)) { 3951 if (TypedefDecl *TD = TDT->getDecl()) 3952 if (TD->getAttr<ObjCNSObjectAttr>()) 3953 return true; 3954 } 3955 return false; 3956} 3957 3958/// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 3959/// garbage collection attribute. 3960/// 3961Qualifiers::GC ASTContext::getObjCGCAttrKind(const QualType &Ty) const { 3962 Qualifiers::GC GCAttrs = Qualifiers::GCNone; 3963 if (getLangOptions().ObjC1 && 3964 getLangOptions().getGCMode() != LangOptions::NonGC) { 3965 GCAttrs = Ty.getObjCGCAttr(); 3966 // Default behavious under objective-c's gc is for objective-c pointers 3967 // (or pointers to them) be treated as though they were declared 3968 // as __strong. 3969 if (GCAttrs == Qualifiers::GCNone) { 3970 if (Ty->isObjCObjectPointerType() || Ty->isBlockPointerType()) 3971 GCAttrs = Qualifiers::Strong; 3972 else if (Ty->isPointerType()) 3973 return getObjCGCAttrKind(Ty->getAs<PointerType>()->getPointeeType()); 3974 } 3975 // Non-pointers have none gc'able attribute regardless of the attribute 3976 // set on them. 3977 else if (!Ty->isAnyPointerType() && !Ty->isBlockPointerType()) 3978 return Qualifiers::GCNone; 3979 } 3980 return GCAttrs; 3981} 3982 3983//===----------------------------------------------------------------------===// 3984// Type Compatibility Testing 3985//===----------------------------------------------------------------------===// 3986 3987/// areCompatVectorTypes - Return true if the two specified vector types are 3988/// compatible. 3989static bool areCompatVectorTypes(const VectorType *LHS, 3990 const VectorType *RHS) { 3991 assert(LHS->isCanonicalUnqualified() && RHS->isCanonicalUnqualified()); 3992 return LHS->getElementType() == RHS->getElementType() && 3993 LHS->getNumElements() == RHS->getNumElements(); 3994} 3995 3996//===----------------------------------------------------------------------===// 3997// ObjCQualifiedIdTypesAreCompatible - Compatibility testing for qualified id's. 3998//===----------------------------------------------------------------------===// 3999 4000/// ProtocolCompatibleWithProtocol - return 'true' if 'lProto' is in the 4001/// inheritance hierarchy of 'rProto'. 4002bool ASTContext::ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 4003 ObjCProtocolDecl *rProto) { 4004 if (lProto == rProto) 4005 return true; 4006 for (ObjCProtocolDecl::protocol_iterator PI = rProto->protocol_begin(), 4007 E = rProto->protocol_end(); PI != E; ++PI) 4008 if (ProtocolCompatibleWithProtocol(lProto, *PI)) 4009 return true; 4010 return false; 4011} 4012 4013/// QualifiedIdConformsQualifiedId - compare id<p,...> with id<p1,...> 4014/// return true if lhs's protocols conform to rhs's protocol; false 4015/// otherwise. 4016bool ASTContext::QualifiedIdConformsQualifiedId(QualType lhs, QualType rhs) { 4017 if (lhs->isObjCQualifiedIdType() && rhs->isObjCQualifiedIdType()) 4018 return ObjCQualifiedIdTypesAreCompatible(lhs, rhs, false); 4019 return false; 4020} 4021 4022/// ObjCQualifiedIdTypesAreCompatible - We know that one of lhs/rhs is an 4023/// ObjCQualifiedIDType. 4024bool ASTContext::ObjCQualifiedIdTypesAreCompatible(QualType lhs, QualType rhs, 4025 bool compare) { 4026 // Allow id<P..> and an 'id' or void* type in all cases. 4027 if (lhs->isVoidPointerType() || 4028 lhs->isObjCIdType() || lhs->isObjCClassType()) 4029 return true; 4030 else if (rhs->isVoidPointerType() || 4031 rhs->isObjCIdType() || rhs->isObjCClassType()) 4032 return true; 4033 4034 if (const ObjCObjectPointerType *lhsQID = lhs->getAsObjCQualifiedIdType()) { 4035 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 4036 4037 if (!rhsOPT) return false; 4038 4039 if (rhsOPT->qual_empty()) { 4040 // If the RHS is a unqualified interface pointer "NSString*", 4041 // make sure we check the class hierarchy. 4042 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4043 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4044 E = lhsQID->qual_end(); I != E; ++I) { 4045 // when comparing an id<P> on lhs with a static type on rhs, 4046 // see if static class implements all of id's protocols, directly or 4047 // through its super class and categories. 4048 if (!rhsID->ClassImplementsProtocol(*I, true)) 4049 return false; 4050 } 4051 } 4052 // If there are no qualifiers and no interface, we have an 'id'. 4053 return true; 4054 } 4055 // Both the right and left sides have qualifiers. 4056 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4057 E = lhsQID->qual_end(); I != E; ++I) { 4058 ObjCProtocolDecl *lhsProto = *I; 4059 bool match = false; 4060 4061 // when comparing an id<P> on lhs with a static type on rhs, 4062 // see if static class implements all of id's protocols, directly or 4063 // through its super class and categories. 4064 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 4065 E = rhsOPT->qual_end(); J != E; ++J) { 4066 ObjCProtocolDecl *rhsProto = *J; 4067 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4068 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4069 match = true; 4070 break; 4071 } 4072 } 4073 // If the RHS is a qualified interface pointer "NSString<P>*", 4074 // make sure we check the class hierarchy. 4075 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4076 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4077 E = lhsQID->qual_end(); I != E; ++I) { 4078 // when comparing an id<P> on lhs with a static type on rhs, 4079 // see if static class implements all of id's protocols, directly or 4080 // through its super class and categories. 4081 if (rhsID->ClassImplementsProtocol(*I, true)) { 4082 match = true; 4083 break; 4084 } 4085 } 4086 } 4087 if (!match) 4088 return false; 4089 } 4090 4091 return true; 4092 } 4093 4094 const ObjCObjectPointerType *rhsQID = rhs->getAsObjCQualifiedIdType(); 4095 assert(rhsQID && "One of the LHS/RHS should be id<x>"); 4096 4097 if (const ObjCObjectPointerType *lhsOPT = 4098 lhs->getAsObjCInterfacePointerType()) { 4099 if (lhsOPT->qual_empty()) { 4100 bool match = false; 4101 if (ObjCInterfaceDecl *lhsID = lhsOPT->getInterfaceDecl()) { 4102 for (ObjCObjectPointerType::qual_iterator I = rhsQID->qual_begin(), 4103 E = rhsQID->qual_end(); I != E; ++I) { 4104 // when comparing an id<P> on lhs with a static type on rhs, 4105 // see if static class implements all of id's protocols, directly or 4106 // through its super class and categories. 4107 if (lhsID->ClassImplementsProtocol(*I, true)) { 4108 match = true; 4109 break; 4110 } 4111 } 4112 if (!match) 4113 return false; 4114 } 4115 return true; 4116 } 4117 // Both the right and left sides have qualifiers. 4118 for (ObjCObjectPointerType::qual_iterator I = lhsOPT->qual_begin(), 4119 E = lhsOPT->qual_end(); I != E; ++I) { 4120 ObjCProtocolDecl *lhsProto = *I; 4121 bool match = false; 4122 4123 // when comparing an id<P> on lhs with a static type on rhs, 4124 // see if static class implements all of id's protocols, directly or 4125 // through its super class and categories. 4126 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 4127 E = rhsQID->qual_end(); J != E; ++J) { 4128 ObjCProtocolDecl *rhsProto = *J; 4129 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4130 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4131 match = true; 4132 break; 4133 } 4134 } 4135 if (!match) 4136 return false; 4137 } 4138 return true; 4139 } 4140 return false; 4141} 4142 4143/// canAssignObjCInterfaces - Return true if the two interface types are 4144/// compatible for assignment from RHS to LHS. This handles validation of any 4145/// protocol qualifiers on the LHS or RHS. 4146/// 4147bool ASTContext::canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 4148 const ObjCObjectPointerType *RHSOPT) { 4149 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 4150 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 4151 4152 // If either type represents the built-in 'id' or 'Class' types, return true. 4153 if (LHS->isObjCUnqualifiedIdOrClass() || 4154 RHS->isObjCUnqualifiedIdOrClass()) 4155 return true; 4156 4157 if (LHS->isObjCQualifiedId() || RHS->isObjCQualifiedId()) 4158 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4159 QualType(RHSOPT,0), 4160 false); 4161 4162 // If we have 2 user-defined types, fall into that path. 4163 if (LHS->getInterface() && RHS->getInterface()) 4164 return canAssignObjCInterfaces(LHS, RHS); 4165 4166 return false; 4167} 4168 4169/// canAssignObjCInterfacesInBlockPointer - This routine is specifically written 4170/// for providing type-safty for objective-c pointers used to pass/return 4171/// arguments in block literals. When passed as arguments, passing 'A*' where 4172/// 'id' is expected is not OK. Passing 'Sub *" where 'Super *" is expected is 4173/// not OK. For the return type, the opposite is not OK. 4174bool ASTContext::canAssignObjCInterfacesInBlockPointer( 4175 const ObjCObjectPointerType *LHSOPT, 4176 const ObjCObjectPointerType *RHSOPT) { 4177 if (RHSOPT->isObjCBuiltinType() || LHSOPT->isObjCIdType()) 4178 return true; 4179 4180 if (LHSOPT->isObjCBuiltinType()) { 4181 return RHSOPT->isObjCBuiltinType() || RHSOPT->isObjCQualifiedIdType(); 4182 } 4183 4184 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 4185 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4186 QualType(RHSOPT,0), 4187 false); 4188 4189 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4190 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4191 if (LHS && RHS) { // We have 2 user-defined types. 4192 if (LHS != RHS) { 4193 if (LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 4194 return false; 4195 if (RHS->getDecl()->isSuperClassOf(LHS->getDecl())) 4196 return true; 4197 } 4198 else 4199 return true; 4200 } 4201 return false; 4202} 4203 4204/// getIntersectionOfProtocols - This routine finds the intersection of set 4205/// of protocols inherited from two distinct objective-c pointer objects. 4206/// It is used to build composite qualifier list of the composite type of 4207/// the conditional expression involving two objective-c pointer objects. 4208static 4209void getIntersectionOfProtocols(ASTContext &Context, 4210 const ObjCObjectPointerType *LHSOPT, 4211 const ObjCObjectPointerType *RHSOPT, 4212 llvm::SmallVectorImpl<ObjCProtocolDecl *> &IntersectionOfProtocols) { 4213 4214 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 4215 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 4216 assert(LHS->getInterface() && "LHS must have an interface base"); 4217 assert(RHS->getInterface() && "RHS must have an interface base"); 4218 4219 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> InheritedProtocolSet; 4220 unsigned LHSNumProtocols = LHS->getNumProtocols(); 4221 if (LHSNumProtocols > 0) 4222 InheritedProtocolSet.insert(LHS->qual_begin(), LHS->qual_end()); 4223 else { 4224 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 4225 Context.CollectInheritedProtocols(LHS->getInterface(), 4226 LHSInheritedProtocols); 4227 InheritedProtocolSet.insert(LHSInheritedProtocols.begin(), 4228 LHSInheritedProtocols.end()); 4229 } 4230 4231 unsigned RHSNumProtocols = RHS->getNumProtocols(); 4232 if (RHSNumProtocols > 0) { 4233 ObjCProtocolDecl **RHSProtocols = 4234 const_cast<ObjCProtocolDecl **>(RHS->qual_begin()); 4235 for (unsigned i = 0; i < RHSNumProtocols; ++i) 4236 if (InheritedProtocolSet.count(RHSProtocols[i])) 4237 IntersectionOfProtocols.push_back(RHSProtocols[i]); 4238 } 4239 else { 4240 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> RHSInheritedProtocols; 4241 Context.CollectInheritedProtocols(RHS->getInterface(), 4242 RHSInheritedProtocols); 4243 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 4244 RHSInheritedProtocols.begin(), 4245 E = RHSInheritedProtocols.end(); I != E; ++I) 4246 if (InheritedProtocolSet.count((*I))) 4247 IntersectionOfProtocols.push_back((*I)); 4248 } 4249} 4250 4251/// areCommonBaseCompatible - Returns common base class of the two classes if 4252/// one found. Note that this is O'2 algorithm. But it will be called as the 4253/// last type comparison in a ?-exp of ObjC pointer types before a 4254/// warning is issued. So, its invokation is extremely rare. 4255QualType ASTContext::areCommonBaseCompatible( 4256 const ObjCObjectPointerType *Lptr, 4257 const ObjCObjectPointerType *Rptr) { 4258 const ObjCObjectType *LHS = Lptr->getObjectType(); 4259 const ObjCObjectType *RHS = Rptr->getObjectType(); 4260 const ObjCInterfaceDecl* LDecl = LHS->getInterface(); 4261 const ObjCInterfaceDecl* RDecl = RHS->getInterface(); 4262 if (!LDecl || !RDecl) 4263 return QualType(); 4264 4265 while ((LDecl = LDecl->getSuperClass())) { 4266 LHS = cast<ObjCInterfaceType>(getObjCInterfaceType(LDecl)); 4267 if (canAssignObjCInterfaces(LHS, RHS)) { 4268 llvm::SmallVector<ObjCProtocolDecl *, 8> Protocols; 4269 getIntersectionOfProtocols(*this, Lptr, Rptr, Protocols); 4270 4271 QualType Result = QualType(LHS, 0); 4272 if (!Protocols.empty()) 4273 Result = getObjCObjectType(Result, Protocols.data(), Protocols.size()); 4274 Result = getObjCObjectPointerType(Result); 4275 return Result; 4276 } 4277 } 4278 4279 return QualType(); 4280} 4281 4282bool ASTContext::canAssignObjCInterfaces(const ObjCObjectType *LHS, 4283 const ObjCObjectType *RHS) { 4284 assert(LHS->getInterface() && "LHS is not an interface type"); 4285 assert(RHS->getInterface() && "RHS is not an interface type"); 4286 4287 // Verify that the base decls are compatible: the RHS must be a subclass of 4288 // the LHS. 4289 if (!LHS->getInterface()->isSuperClassOf(RHS->getInterface())) 4290 return false; 4291 4292 // RHS must have a superset of the protocols in the LHS. If the LHS is not 4293 // protocol qualified at all, then we are good. 4294 if (LHS->getNumProtocols() == 0) 4295 return true; 4296 4297 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, then it 4298 // isn't a superset. 4299 if (RHS->getNumProtocols() == 0) 4300 return true; // FIXME: should return false! 4301 4302 for (ObjCObjectType::qual_iterator LHSPI = LHS->qual_begin(), 4303 LHSPE = LHS->qual_end(); 4304 LHSPI != LHSPE; LHSPI++) { 4305 bool RHSImplementsProtocol = false; 4306 4307 // If the RHS doesn't implement the protocol on the left, the types 4308 // are incompatible. 4309 for (ObjCObjectType::qual_iterator RHSPI = RHS->qual_begin(), 4310 RHSPE = RHS->qual_end(); 4311 RHSPI != RHSPE; RHSPI++) { 4312 if ((*RHSPI)->lookupProtocolNamed((*LHSPI)->getIdentifier())) { 4313 RHSImplementsProtocol = true; 4314 break; 4315 } 4316 } 4317 // FIXME: For better diagnostics, consider passing back the protocol name. 4318 if (!RHSImplementsProtocol) 4319 return false; 4320 } 4321 // The RHS implements all protocols listed on the LHS. 4322 return true; 4323} 4324 4325bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) { 4326 // get the "pointed to" types 4327 const ObjCObjectPointerType *LHSOPT = LHS->getAs<ObjCObjectPointerType>(); 4328 const ObjCObjectPointerType *RHSOPT = RHS->getAs<ObjCObjectPointerType>(); 4329 4330 if (!LHSOPT || !RHSOPT) 4331 return false; 4332 4333 return canAssignObjCInterfaces(LHSOPT, RHSOPT) || 4334 canAssignObjCInterfaces(RHSOPT, LHSOPT); 4335} 4336 4337/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible, 4338/// both shall have the identically qualified version of a compatible type. 4339/// C99 6.2.7p1: Two types have compatible types if their types are the 4340/// same. See 6.7.[2,3,5] for additional rules. 4341bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS) { 4342 if (getLangOptions().CPlusPlus) 4343 return hasSameType(LHS, RHS); 4344 4345 return !mergeTypes(LHS, RHS).isNull(); 4346} 4347 4348bool ASTContext::typesAreBlockPointerCompatible(QualType LHS, QualType RHS) { 4349 return !mergeTypes(LHS, RHS, true).isNull(); 4350} 4351 4352QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs, 4353 bool OfBlockPointer) { 4354 const FunctionType *lbase = lhs->getAs<FunctionType>(); 4355 const FunctionType *rbase = rhs->getAs<FunctionType>(); 4356 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 4357 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 4358 bool allLTypes = true; 4359 bool allRTypes = true; 4360 4361 // Check return type 4362 QualType retType; 4363 if (OfBlockPointer) 4364 retType = mergeTypes(rbase->getResultType(), lbase->getResultType(), true); 4365 else 4366 retType = mergeTypes(lbase->getResultType(), rbase->getResultType()); 4367 if (retType.isNull()) return QualType(); 4368 if (getCanonicalType(retType) != getCanonicalType(lbase->getResultType())) 4369 allLTypes = false; 4370 if (getCanonicalType(retType) != getCanonicalType(rbase->getResultType())) 4371 allRTypes = false; 4372 // FIXME: double check this 4373 // FIXME: should we error if lbase->getRegParmAttr() != 0 && 4374 // rbase->getRegParmAttr() != 0 && 4375 // lbase->getRegParmAttr() != rbase->getRegParmAttr()? 4376 FunctionType::ExtInfo lbaseInfo = lbase->getExtInfo(); 4377 FunctionType::ExtInfo rbaseInfo = rbase->getExtInfo(); 4378 unsigned RegParm = lbaseInfo.getRegParm() == 0 ? rbaseInfo.getRegParm() : 4379 lbaseInfo.getRegParm(); 4380 bool NoReturn = lbaseInfo.getNoReturn() || rbaseInfo.getNoReturn(); 4381 if (NoReturn != lbaseInfo.getNoReturn() || 4382 RegParm != lbaseInfo.getRegParm()) 4383 allLTypes = false; 4384 if (NoReturn != rbaseInfo.getNoReturn() || 4385 RegParm != rbaseInfo.getRegParm()) 4386 allRTypes = false; 4387 CallingConv lcc = lbaseInfo.getCC(); 4388 CallingConv rcc = rbaseInfo.getCC(); 4389 // Compatible functions must have compatible calling conventions 4390 if (!isSameCallConv(lcc, rcc)) 4391 return QualType(); 4392 4393 if (lproto && rproto) { // two C99 style function prototypes 4394 assert(!lproto->hasExceptionSpec() && !rproto->hasExceptionSpec() && 4395 "C++ shouldn't be here"); 4396 unsigned lproto_nargs = lproto->getNumArgs(); 4397 unsigned rproto_nargs = rproto->getNumArgs(); 4398 4399 // Compatible functions must have the same number of arguments 4400 if (lproto_nargs != rproto_nargs) 4401 return QualType(); 4402 4403 // Variadic and non-variadic functions aren't compatible 4404 if (lproto->isVariadic() != rproto->isVariadic()) 4405 return QualType(); 4406 4407 if (lproto->getTypeQuals() != rproto->getTypeQuals()) 4408 return QualType(); 4409 4410 // Check argument compatibility 4411 llvm::SmallVector<QualType, 10> types; 4412 for (unsigned i = 0; i < lproto_nargs; i++) { 4413 QualType largtype = lproto->getArgType(i).getUnqualifiedType(); 4414 QualType rargtype = rproto->getArgType(i).getUnqualifiedType(); 4415 QualType argtype = mergeTypes(largtype, rargtype, OfBlockPointer); 4416 if (argtype.isNull()) return QualType(); 4417 types.push_back(argtype); 4418 if (getCanonicalType(argtype) != getCanonicalType(largtype)) 4419 allLTypes = false; 4420 if (getCanonicalType(argtype) != getCanonicalType(rargtype)) 4421 allRTypes = false; 4422 } 4423 if (allLTypes) return lhs; 4424 if (allRTypes) return rhs; 4425 return getFunctionType(retType, types.begin(), types.size(), 4426 lproto->isVariadic(), lproto->getTypeQuals(), 4427 false, false, 0, 0, 4428 FunctionType::ExtInfo(NoReturn, RegParm, lcc)); 4429 } 4430 4431 if (lproto) allRTypes = false; 4432 if (rproto) allLTypes = false; 4433 4434 const FunctionProtoType *proto = lproto ? lproto : rproto; 4435 if (proto) { 4436 assert(!proto->hasExceptionSpec() && "C++ shouldn't be here"); 4437 if (proto->isVariadic()) return QualType(); 4438 // Check that the types are compatible with the types that 4439 // would result from default argument promotions (C99 6.7.5.3p15). 4440 // The only types actually affected are promotable integer 4441 // types and floats, which would be passed as a different 4442 // type depending on whether the prototype is visible. 4443 unsigned proto_nargs = proto->getNumArgs(); 4444 for (unsigned i = 0; i < proto_nargs; ++i) { 4445 QualType argTy = proto->getArgType(i); 4446 4447 // Look at the promotion type of enum types, since that is the type used 4448 // to pass enum values. 4449 if (const EnumType *Enum = argTy->getAs<EnumType>()) 4450 argTy = Enum->getDecl()->getPromotionType(); 4451 4452 if (argTy->isPromotableIntegerType() || 4453 getCanonicalType(argTy).getUnqualifiedType() == FloatTy) 4454 return QualType(); 4455 } 4456 4457 if (allLTypes) return lhs; 4458 if (allRTypes) return rhs; 4459 return getFunctionType(retType, proto->arg_type_begin(), 4460 proto->getNumArgs(), proto->isVariadic(), 4461 proto->getTypeQuals(), 4462 false, false, 0, 0, 4463 FunctionType::ExtInfo(NoReturn, RegParm, lcc)); 4464 } 4465 4466 if (allLTypes) return lhs; 4467 if (allRTypes) return rhs; 4468 FunctionType::ExtInfo Info(NoReturn, RegParm, lcc); 4469 return getFunctionNoProtoType(retType, Info); 4470} 4471 4472QualType ASTContext::mergeTypes(QualType LHS, QualType RHS, 4473 bool OfBlockPointer) { 4474 // C++ [expr]: If an expression initially has the type "reference to T", the 4475 // type is adjusted to "T" prior to any further analysis, the expression 4476 // designates the object or function denoted by the reference, and the 4477 // expression is an lvalue unless the reference is an rvalue reference and 4478 // the expression is a function call (possibly inside parentheses). 4479 assert(!LHS->getAs<ReferenceType>() && "LHS is a reference type?"); 4480 assert(!RHS->getAs<ReferenceType>() && "RHS is a reference type?"); 4481 4482 QualType LHSCan = getCanonicalType(LHS), 4483 RHSCan = getCanonicalType(RHS); 4484 4485 // If two types are identical, they are compatible. 4486 if (LHSCan == RHSCan) 4487 return LHS; 4488 4489 // If the qualifiers are different, the types aren't compatible... mostly. 4490 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 4491 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 4492 if (LQuals != RQuals) { 4493 // If any of these qualifiers are different, we have a type 4494 // mismatch. 4495 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 4496 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 4497 return QualType(); 4498 4499 // Exactly one GC qualifier difference is allowed: __strong is 4500 // okay if the other type has no GC qualifier but is an Objective 4501 // C object pointer (i.e. implicitly strong by default). We fix 4502 // this by pretending that the unqualified type was actually 4503 // qualified __strong. 4504 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 4505 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 4506 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 4507 4508 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 4509 return QualType(); 4510 4511 if (GC_L == Qualifiers::Strong && RHSCan->isObjCObjectPointerType()) { 4512 return mergeTypes(LHS, getObjCGCQualType(RHS, Qualifiers::Strong)); 4513 } 4514 if (GC_R == Qualifiers::Strong && LHSCan->isObjCObjectPointerType()) { 4515 return mergeTypes(getObjCGCQualType(LHS, Qualifiers::Strong), RHS); 4516 } 4517 return QualType(); 4518 } 4519 4520 // Okay, qualifiers are equal. 4521 4522 Type::TypeClass LHSClass = LHSCan->getTypeClass(); 4523 Type::TypeClass RHSClass = RHSCan->getTypeClass(); 4524 4525 // We want to consider the two function types to be the same for these 4526 // comparisons, just force one to the other. 4527 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto; 4528 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto; 4529 4530 // Same as above for arrays 4531 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray) 4532 LHSClass = Type::ConstantArray; 4533 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray) 4534 RHSClass = Type::ConstantArray; 4535 4536 // ObjCInterfaces are just specialized ObjCObjects. 4537 if (LHSClass == Type::ObjCInterface) LHSClass = Type::ObjCObject; 4538 if (RHSClass == Type::ObjCInterface) RHSClass = Type::ObjCObject; 4539 4540 // Canonicalize ExtVector -> Vector. 4541 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector; 4542 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector; 4543 4544 // If the canonical type classes don't match. 4545 if (LHSClass != RHSClass) { 4546 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char, 4547 // a signed integer type, or an unsigned integer type. 4548 // Compatibility is based on the underlying type, not the promotion 4549 // type. 4550 if (const EnumType* ETy = LHS->getAs<EnumType>()) { 4551 if (ETy->getDecl()->getIntegerType() == RHSCan.getUnqualifiedType()) 4552 return RHS; 4553 } 4554 if (const EnumType* ETy = RHS->getAs<EnumType>()) { 4555 if (ETy->getDecl()->getIntegerType() == LHSCan.getUnqualifiedType()) 4556 return LHS; 4557 } 4558 4559 return QualType(); 4560 } 4561 4562 // The canonical type classes match. 4563 switch (LHSClass) { 4564#define TYPE(Class, Base) 4565#define ABSTRACT_TYPE(Class, Base) 4566#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) case Type::Class: 4567#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 4568#define DEPENDENT_TYPE(Class, Base) case Type::Class: 4569#include "clang/AST/TypeNodes.def" 4570 assert(false && "Non-canonical and dependent types shouldn't get here"); 4571 return QualType(); 4572 4573 case Type::LValueReference: 4574 case Type::RValueReference: 4575 case Type::MemberPointer: 4576 assert(false && "C++ should never be in mergeTypes"); 4577 return QualType(); 4578 4579 case Type::ObjCInterface: 4580 case Type::IncompleteArray: 4581 case Type::VariableArray: 4582 case Type::FunctionProto: 4583 case Type::ExtVector: 4584 assert(false && "Types are eliminated above"); 4585 return QualType(); 4586 4587 case Type::Pointer: 4588 { 4589 // Merge two pointer types, while trying to preserve typedef info 4590 QualType LHSPointee = LHS->getAs<PointerType>()->getPointeeType(); 4591 QualType RHSPointee = RHS->getAs<PointerType>()->getPointeeType(); 4592 QualType ResultType = mergeTypes(LHSPointee, RHSPointee); 4593 if (ResultType.isNull()) return QualType(); 4594 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 4595 return LHS; 4596 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 4597 return RHS; 4598 return getPointerType(ResultType); 4599 } 4600 case Type::BlockPointer: 4601 { 4602 // Merge two block pointer types, while trying to preserve typedef info 4603 QualType LHSPointee = LHS->getAs<BlockPointerType>()->getPointeeType(); 4604 QualType RHSPointee = RHS->getAs<BlockPointerType>()->getPointeeType(); 4605 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, OfBlockPointer); 4606 if (ResultType.isNull()) return QualType(); 4607 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 4608 return LHS; 4609 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 4610 return RHS; 4611 return getBlockPointerType(ResultType); 4612 } 4613 case Type::ConstantArray: 4614 { 4615 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS); 4616 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS); 4617 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize()) 4618 return QualType(); 4619 4620 QualType LHSElem = getAsArrayType(LHS)->getElementType(); 4621 QualType RHSElem = getAsArrayType(RHS)->getElementType(); 4622 QualType ResultType = mergeTypes(LHSElem, RHSElem); 4623 if (ResultType.isNull()) return QualType(); 4624 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 4625 return LHS; 4626 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 4627 return RHS; 4628 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(), 4629 ArrayType::ArraySizeModifier(), 0); 4630 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(), 4631 ArrayType::ArraySizeModifier(), 0); 4632 const VariableArrayType* LVAT = getAsVariableArrayType(LHS); 4633 const VariableArrayType* RVAT = getAsVariableArrayType(RHS); 4634 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 4635 return LHS; 4636 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 4637 return RHS; 4638 if (LVAT) { 4639 // FIXME: This isn't correct! But tricky to implement because 4640 // the array's size has to be the size of LHS, but the type 4641 // has to be different. 4642 return LHS; 4643 } 4644 if (RVAT) { 4645 // FIXME: This isn't correct! But tricky to implement because 4646 // the array's size has to be the size of RHS, but the type 4647 // has to be different. 4648 return RHS; 4649 } 4650 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS; 4651 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS; 4652 return getIncompleteArrayType(ResultType, 4653 ArrayType::ArraySizeModifier(), 0); 4654 } 4655 case Type::FunctionNoProto: 4656 return mergeFunctionTypes(LHS, RHS, OfBlockPointer); 4657 case Type::Record: 4658 case Type::Enum: 4659 return QualType(); 4660 case Type::Builtin: 4661 // Only exactly equal builtin types are compatible, which is tested above. 4662 return QualType(); 4663 case Type::Complex: 4664 // Distinct complex types are incompatible. 4665 return QualType(); 4666 case Type::Vector: 4667 // FIXME: The merged type should be an ExtVector! 4668 if (areCompatVectorTypes(LHSCan->getAs<VectorType>(), 4669 RHSCan->getAs<VectorType>())) 4670 return LHS; 4671 return QualType(); 4672 case Type::ObjCObject: { 4673 // Check if the types are assignment compatible. 4674 // FIXME: This should be type compatibility, e.g. whether 4675 // "LHS x; RHS x;" at global scope is legal. 4676 const ObjCObjectType* LHSIface = LHS->getAs<ObjCObjectType>(); 4677 const ObjCObjectType* RHSIface = RHS->getAs<ObjCObjectType>(); 4678 if (canAssignObjCInterfaces(LHSIface, RHSIface)) 4679 return LHS; 4680 4681 return QualType(); 4682 } 4683 case Type::ObjCObjectPointer: { 4684 if (OfBlockPointer) { 4685 if (canAssignObjCInterfacesInBlockPointer( 4686 LHS->getAs<ObjCObjectPointerType>(), 4687 RHS->getAs<ObjCObjectPointerType>())) 4688 return LHS; 4689 return QualType(); 4690 } 4691 if (canAssignObjCInterfaces(LHS->getAs<ObjCObjectPointerType>(), 4692 RHS->getAs<ObjCObjectPointerType>())) 4693 return LHS; 4694 4695 return QualType(); 4696 } 4697 } 4698 4699 return QualType(); 4700} 4701 4702/// mergeObjCGCQualifiers - This routine merges ObjC's GC attribute of 'LHS' and 4703/// 'RHS' attributes and returns the merged version; including for function 4704/// return types. 4705QualType ASTContext::mergeObjCGCQualifiers(QualType LHS, QualType RHS) { 4706 QualType LHSCan = getCanonicalType(LHS), 4707 RHSCan = getCanonicalType(RHS); 4708 // If two types are identical, they are compatible. 4709 if (LHSCan == RHSCan) 4710 return LHS; 4711 if (RHSCan->isFunctionType()) { 4712 if (!LHSCan->isFunctionType()) 4713 return QualType(); 4714 QualType OldReturnType = 4715 cast<FunctionType>(RHSCan.getTypePtr())->getResultType(); 4716 QualType NewReturnType = 4717 cast<FunctionType>(LHSCan.getTypePtr())->getResultType(); 4718 QualType ResReturnType = 4719 mergeObjCGCQualifiers(NewReturnType, OldReturnType); 4720 if (ResReturnType.isNull()) 4721 return QualType(); 4722 if (ResReturnType == NewReturnType || ResReturnType == OldReturnType) { 4723 // id foo(); ... __strong id foo(); or: __strong id foo(); ... id foo(); 4724 // In either case, use OldReturnType to build the new function type. 4725 const FunctionType *F = LHS->getAs<FunctionType>(); 4726 if (const FunctionProtoType *FPT = cast<FunctionProtoType>(F)) { 4727 FunctionType::ExtInfo Info = getFunctionExtInfo(LHS); 4728 QualType ResultType 4729 = getFunctionType(OldReturnType, FPT->arg_type_begin(), 4730 FPT->getNumArgs(), FPT->isVariadic(), 4731 FPT->getTypeQuals(), 4732 FPT->hasExceptionSpec(), 4733 FPT->hasAnyExceptionSpec(), 4734 FPT->getNumExceptions(), 4735 FPT->exception_begin(), 4736 Info); 4737 return ResultType; 4738 } 4739 } 4740 return QualType(); 4741 } 4742 4743 // If the qualifiers are different, the types can still be merged. 4744 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 4745 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 4746 if (LQuals != RQuals) { 4747 // If any of these qualifiers are different, we have a type mismatch. 4748 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 4749 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 4750 return QualType(); 4751 4752 // Exactly one GC qualifier difference is allowed: __strong is 4753 // okay if the other type has no GC qualifier but is an Objective 4754 // C object pointer (i.e. implicitly strong by default). We fix 4755 // this by pretending that the unqualified type was actually 4756 // qualified __strong. 4757 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 4758 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 4759 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 4760 4761 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 4762 return QualType(); 4763 4764 if (GC_L == Qualifiers::Strong) 4765 return LHS; 4766 if (GC_R == Qualifiers::Strong) 4767 return RHS; 4768 return QualType(); 4769 } 4770 4771 if (LHSCan->isObjCObjectPointerType() && RHSCan->isObjCObjectPointerType()) { 4772 QualType LHSBaseQT = LHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 4773 QualType RHSBaseQT = RHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 4774 QualType ResQT = mergeObjCGCQualifiers(LHSBaseQT, RHSBaseQT); 4775 if (ResQT == LHSBaseQT) 4776 return LHS; 4777 if (ResQT == RHSBaseQT) 4778 return RHS; 4779 } 4780 return QualType(); 4781} 4782 4783//===----------------------------------------------------------------------===// 4784// Integer Predicates 4785//===----------------------------------------------------------------------===// 4786 4787unsigned ASTContext::getIntWidth(QualType T) { 4788 if (T->isBooleanType()) 4789 return 1; 4790 if (EnumType *ET = dyn_cast<EnumType>(T)) 4791 T = ET->getDecl()->getIntegerType(); 4792 // For builtin types, just use the standard type sizing method 4793 return (unsigned)getTypeSize(T); 4794} 4795 4796QualType ASTContext::getCorrespondingUnsignedType(QualType T) { 4797 assert(T->isSignedIntegerType() && "Unexpected type"); 4798 4799 // Turn <4 x signed int> -> <4 x unsigned int> 4800 if (const VectorType *VTy = T->getAs<VectorType>()) 4801 return getVectorType(getCorrespondingUnsignedType(VTy->getElementType()), 4802 VTy->getNumElements(), VTy->isAltiVec(), VTy->isPixel()); 4803 4804 // For enums, we return the unsigned version of the base type. 4805 if (const EnumType *ETy = T->getAs<EnumType>()) 4806 T = ETy->getDecl()->getIntegerType(); 4807 4808 const BuiltinType *BTy = T->getAs<BuiltinType>(); 4809 assert(BTy && "Unexpected signed integer type"); 4810 switch (BTy->getKind()) { 4811 case BuiltinType::Char_S: 4812 case BuiltinType::SChar: 4813 return UnsignedCharTy; 4814 case BuiltinType::Short: 4815 return UnsignedShortTy; 4816 case BuiltinType::Int: 4817 return UnsignedIntTy; 4818 case BuiltinType::Long: 4819 return UnsignedLongTy; 4820 case BuiltinType::LongLong: 4821 return UnsignedLongLongTy; 4822 case BuiltinType::Int128: 4823 return UnsignedInt128Ty; 4824 default: 4825 assert(0 && "Unexpected signed integer type"); 4826 return QualType(); 4827 } 4828} 4829 4830ExternalASTSource::~ExternalASTSource() { } 4831 4832void ExternalASTSource::PrintStats() { } 4833 4834 4835//===----------------------------------------------------------------------===// 4836// Builtin Type Computation 4837//===----------------------------------------------------------------------===// 4838 4839/// DecodeTypeFromStr - This decodes one type descriptor from Str, advancing the 4840/// pointer over the consumed characters. This returns the resultant type. 4841static QualType DecodeTypeFromStr(const char *&Str, ASTContext &Context, 4842 ASTContext::GetBuiltinTypeError &Error, 4843 bool AllowTypeModifiers = true) { 4844 // Modifiers. 4845 int HowLong = 0; 4846 bool Signed = false, Unsigned = false; 4847 4848 // Read the modifiers first. 4849 bool Done = false; 4850 while (!Done) { 4851 switch (*Str++) { 4852 default: Done = true; --Str; break; 4853 case 'S': 4854 assert(!Unsigned && "Can't use both 'S' and 'U' modifiers!"); 4855 assert(!Signed && "Can't use 'S' modifier multiple times!"); 4856 Signed = true; 4857 break; 4858 case 'U': 4859 assert(!Signed && "Can't use both 'S' and 'U' modifiers!"); 4860 assert(!Unsigned && "Can't use 'S' modifier multiple times!"); 4861 Unsigned = true; 4862 break; 4863 case 'L': 4864 assert(HowLong <= 2 && "Can't have LLLL modifier"); 4865 ++HowLong; 4866 break; 4867 } 4868 } 4869 4870 QualType Type; 4871 4872 // Read the base type. 4873 switch (*Str++) { 4874 default: assert(0 && "Unknown builtin type letter!"); 4875 case 'v': 4876 assert(HowLong == 0 && !Signed && !Unsigned && 4877 "Bad modifiers used with 'v'!"); 4878 Type = Context.VoidTy; 4879 break; 4880 case 'f': 4881 assert(HowLong == 0 && !Signed && !Unsigned && 4882 "Bad modifiers used with 'f'!"); 4883 Type = Context.FloatTy; 4884 break; 4885 case 'd': 4886 assert(HowLong < 2 && !Signed && !Unsigned && 4887 "Bad modifiers used with 'd'!"); 4888 if (HowLong) 4889 Type = Context.LongDoubleTy; 4890 else 4891 Type = Context.DoubleTy; 4892 break; 4893 case 's': 4894 assert(HowLong == 0 && "Bad modifiers used with 's'!"); 4895 if (Unsigned) 4896 Type = Context.UnsignedShortTy; 4897 else 4898 Type = Context.ShortTy; 4899 break; 4900 case 'i': 4901 if (HowLong == 3) 4902 Type = Unsigned ? Context.UnsignedInt128Ty : Context.Int128Ty; 4903 else if (HowLong == 2) 4904 Type = Unsigned ? Context.UnsignedLongLongTy : Context.LongLongTy; 4905 else if (HowLong == 1) 4906 Type = Unsigned ? Context.UnsignedLongTy : Context.LongTy; 4907 else 4908 Type = Unsigned ? Context.UnsignedIntTy : Context.IntTy; 4909 break; 4910 case 'c': 4911 assert(HowLong == 0 && "Bad modifiers used with 'c'!"); 4912 if (Signed) 4913 Type = Context.SignedCharTy; 4914 else if (Unsigned) 4915 Type = Context.UnsignedCharTy; 4916 else 4917 Type = Context.CharTy; 4918 break; 4919 case 'b': // boolean 4920 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'b'!"); 4921 Type = Context.BoolTy; 4922 break; 4923 case 'z': // size_t. 4924 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'z'!"); 4925 Type = Context.getSizeType(); 4926 break; 4927 case 'F': 4928 Type = Context.getCFConstantStringType(); 4929 break; 4930 case 'a': 4931 Type = Context.getBuiltinVaListType(); 4932 assert(!Type.isNull() && "builtin va list type not initialized!"); 4933 break; 4934 case 'A': 4935 // This is a "reference" to a va_list; however, what exactly 4936 // this means depends on how va_list is defined. There are two 4937 // different kinds of va_list: ones passed by value, and ones 4938 // passed by reference. An example of a by-value va_list is 4939 // x86, where va_list is a char*. An example of by-ref va_list 4940 // is x86-64, where va_list is a __va_list_tag[1]. For x86, 4941 // we want this argument to be a char*&; for x86-64, we want 4942 // it to be a __va_list_tag*. 4943 Type = Context.getBuiltinVaListType(); 4944 assert(!Type.isNull() && "builtin va list type not initialized!"); 4945 if (Type->isArrayType()) { 4946 Type = Context.getArrayDecayedType(Type); 4947 } else { 4948 Type = Context.getLValueReferenceType(Type); 4949 } 4950 break; 4951 case 'V': { 4952 char *End; 4953 unsigned NumElements = strtoul(Str, &End, 10); 4954 assert(End != Str && "Missing vector size"); 4955 4956 Str = End; 4957 4958 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 4959 // FIXME: Don't know what to do about AltiVec. 4960 Type = Context.getVectorType(ElementType, NumElements, false, false); 4961 break; 4962 } 4963 case 'X': { 4964 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 4965 Type = Context.getComplexType(ElementType); 4966 break; 4967 } 4968 case 'P': 4969 Type = Context.getFILEType(); 4970 if (Type.isNull()) { 4971 Error = ASTContext::GE_Missing_stdio; 4972 return QualType(); 4973 } 4974 break; 4975 case 'J': 4976 if (Signed) 4977 Type = Context.getsigjmp_bufType(); 4978 else 4979 Type = Context.getjmp_bufType(); 4980 4981 if (Type.isNull()) { 4982 Error = ASTContext::GE_Missing_setjmp; 4983 return QualType(); 4984 } 4985 break; 4986 } 4987 4988 if (!AllowTypeModifiers) 4989 return Type; 4990 4991 Done = false; 4992 while (!Done) { 4993 switch (char c = *Str++) { 4994 default: Done = true; --Str; break; 4995 case '*': 4996 case '&': 4997 { 4998 // Both pointers and references can have their pointee types 4999 // qualified with an address space. 5000 char *End; 5001 unsigned AddrSpace = strtoul(Str, &End, 10); 5002 if (End != Str && AddrSpace != 0) { 5003 Type = Context.getAddrSpaceQualType(Type, AddrSpace); 5004 Str = End; 5005 } 5006 } 5007 if (c == '*') 5008 Type = Context.getPointerType(Type); 5009 else 5010 Type = Context.getLValueReferenceType(Type); 5011 break; 5012 // FIXME: There's no way to have a built-in with an rvalue ref arg. 5013 case 'C': 5014 Type = Type.withConst(); 5015 break; 5016 case 'D': 5017 Type = Context.getVolatileType(Type); 5018 break; 5019 } 5020 } 5021 5022 return Type; 5023} 5024 5025/// GetBuiltinType - Return the type for the specified builtin. 5026QualType ASTContext::GetBuiltinType(unsigned id, 5027 GetBuiltinTypeError &Error) { 5028 const char *TypeStr = BuiltinInfo.GetTypeString(id); 5029 5030 llvm::SmallVector<QualType, 8> ArgTypes; 5031 5032 Error = GE_None; 5033 QualType ResType = DecodeTypeFromStr(TypeStr, *this, Error); 5034 if (Error != GE_None) 5035 return QualType(); 5036 while (TypeStr[0] && TypeStr[0] != '.') { 5037 QualType Ty = DecodeTypeFromStr(TypeStr, *this, Error); 5038 if (Error != GE_None) 5039 return QualType(); 5040 5041 // Do array -> pointer decay. The builtin should use the decayed type. 5042 if (Ty->isArrayType()) 5043 Ty = getArrayDecayedType(Ty); 5044 5045 ArgTypes.push_back(Ty); 5046 } 5047 5048 assert((TypeStr[0] != '.' || TypeStr[1] == 0) && 5049 "'.' should only occur at end of builtin type list!"); 5050 5051 // handle untyped/variadic arguments "T c99Style();" or "T cppStyle(...);". 5052 if (ArgTypes.size() == 0 && TypeStr[0] == '.') 5053 return getFunctionNoProtoType(ResType); 5054 5055 // FIXME: Should we create noreturn types? 5056 return getFunctionType(ResType, ArgTypes.data(), ArgTypes.size(), 5057 TypeStr[0] == '.', 0, false, false, 0, 0, 5058 FunctionType::ExtInfo()); 5059} 5060 5061QualType 5062ASTContext::UsualArithmeticConversionsType(QualType lhs, QualType rhs) { 5063 // Perform the usual unary conversions. We do this early so that 5064 // integral promotions to "int" can allow us to exit early, in the 5065 // lhs == rhs check. Also, for conversion purposes, we ignore any 5066 // qualifiers. For example, "const float" and "float" are 5067 // equivalent. 5068 if (lhs->isPromotableIntegerType()) 5069 lhs = getPromotedIntegerType(lhs); 5070 else 5071 lhs = lhs.getUnqualifiedType(); 5072 if (rhs->isPromotableIntegerType()) 5073 rhs = getPromotedIntegerType(rhs); 5074 else 5075 rhs = rhs.getUnqualifiedType(); 5076 5077 // If both types are identical, no conversion is needed. 5078 if (lhs == rhs) 5079 return lhs; 5080 5081 // If either side is a non-arithmetic type (e.g. a pointer), we are done. 5082 // The caller can deal with this (e.g. pointer + int). 5083 if (!lhs->isArithmeticType() || !rhs->isArithmeticType()) 5084 return lhs; 5085 5086 // At this point, we have two different arithmetic types. 5087 5088 // Handle complex types first (C99 6.3.1.8p1). 5089 if (lhs->isComplexType() || rhs->isComplexType()) { 5090 // if we have an integer operand, the result is the complex type. 5091 if (rhs->isIntegerType() || rhs->isComplexIntegerType()) { 5092 // convert the rhs to the lhs complex type. 5093 return lhs; 5094 } 5095 if (lhs->isIntegerType() || lhs->isComplexIntegerType()) { 5096 // convert the lhs to the rhs complex type. 5097 return rhs; 5098 } 5099 // This handles complex/complex, complex/float, or float/complex. 5100 // When both operands are complex, the shorter operand is converted to the 5101 // type of the longer, and that is the type of the result. This corresponds 5102 // to what is done when combining two real floating-point operands. 5103 // The fun begins when size promotion occur across type domains. 5104 // From H&S 6.3.4: When one operand is complex and the other is a real 5105 // floating-point type, the less precise type is converted, within it's 5106 // real or complex domain, to the precision of the other type. For example, 5107 // when combining a "long double" with a "double _Complex", the 5108 // "double _Complex" is promoted to "long double _Complex". 5109 int result = getFloatingTypeOrder(lhs, rhs); 5110 5111 if (result > 0) { // The left side is bigger, convert rhs. 5112 rhs = getFloatingTypeOfSizeWithinDomain(lhs, rhs); 5113 } else if (result < 0) { // The right side is bigger, convert lhs. 5114 lhs = getFloatingTypeOfSizeWithinDomain(rhs, lhs); 5115 } 5116 // At this point, lhs and rhs have the same rank/size. Now, make sure the 5117 // domains match. This is a requirement for our implementation, C99 5118 // does not require this promotion. 5119 if (lhs != rhs) { // Domains don't match, we have complex/float mix. 5120 if (lhs->isRealFloatingType()) { // handle "double, _Complex double". 5121 return rhs; 5122 } else { // handle "_Complex double, double". 5123 return lhs; 5124 } 5125 } 5126 return lhs; // The domain/size match exactly. 5127 } 5128 // Now handle "real" floating types (i.e. float, double, long double). 5129 if (lhs->isRealFloatingType() || rhs->isRealFloatingType()) { 5130 // if we have an integer operand, the result is the real floating type. 5131 if (rhs->isIntegerType()) { 5132 // convert rhs to the lhs floating point type. 5133 return lhs; 5134 } 5135 if (rhs->isComplexIntegerType()) { 5136 // convert rhs to the complex floating point type. 5137 return getComplexType(lhs); 5138 } 5139 if (lhs->isIntegerType()) { 5140 // convert lhs to the rhs floating point type. 5141 return rhs; 5142 } 5143 if (lhs->isComplexIntegerType()) { 5144 // convert lhs to the complex floating point type. 5145 return getComplexType(rhs); 5146 } 5147 // We have two real floating types, float/complex combos were handled above. 5148 // Convert the smaller operand to the bigger result. 5149 int result = getFloatingTypeOrder(lhs, rhs); 5150 if (result > 0) // convert the rhs 5151 return lhs; 5152 assert(result < 0 && "illegal float comparison"); 5153 return rhs; // convert the lhs 5154 } 5155 if (lhs->isComplexIntegerType() || rhs->isComplexIntegerType()) { 5156 // Handle GCC complex int extension. 5157 const ComplexType *lhsComplexInt = lhs->getAsComplexIntegerType(); 5158 const ComplexType *rhsComplexInt = rhs->getAsComplexIntegerType(); 5159 5160 if (lhsComplexInt && rhsComplexInt) { 5161 if (getIntegerTypeOrder(lhsComplexInt->getElementType(), 5162 rhsComplexInt->getElementType()) >= 0) 5163 return lhs; // convert the rhs 5164 return rhs; 5165 } else if (lhsComplexInt && rhs->isIntegerType()) { 5166 // convert the rhs to the lhs complex type. 5167 return lhs; 5168 } else if (rhsComplexInt && lhs->isIntegerType()) { 5169 // convert the lhs to the rhs complex type. 5170 return rhs; 5171 } 5172 } 5173 // Finally, we have two differing integer types. 5174 // The rules for this case are in C99 6.3.1.8 5175 int compare = getIntegerTypeOrder(lhs, rhs); 5176 bool lhsSigned = lhs->isSignedIntegerType(), 5177 rhsSigned = rhs->isSignedIntegerType(); 5178 QualType destType; 5179 if (lhsSigned == rhsSigned) { 5180 // Same signedness; use the higher-ranked type 5181 destType = compare >= 0 ? lhs : rhs; 5182 } else if (compare != (lhsSigned ? 1 : -1)) { 5183 // The unsigned type has greater than or equal rank to the 5184 // signed type, so use the unsigned type 5185 destType = lhsSigned ? rhs : lhs; 5186 } else if (getIntWidth(lhs) != getIntWidth(rhs)) { 5187 // The two types are different widths; if we are here, that 5188 // means the signed type is larger than the unsigned type, so 5189 // use the signed type. 5190 destType = lhsSigned ? lhs : rhs; 5191 } else { 5192 // The signed type is higher-ranked than the unsigned type, 5193 // but isn't actually any bigger (like unsigned int and long 5194 // on most 32-bit systems). Use the unsigned type corresponding 5195 // to the signed type. 5196 destType = getCorrespondingUnsignedType(lhsSigned ? lhs : rhs); 5197 } 5198 return destType; 5199} 5200