ASTContext.cpp revision 2888b65aae768f54062505330df7be230a0510c7
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/ExternalASTSource.h" 22#include "clang/AST/RecordLayout.h" 23#include "clang/Basic/Builtins.h" 24#include "clang/Basic/SourceManager.h" 25#include "clang/Basic/TargetInfo.h" 26#include "llvm/ADT/SmallString.h" 27#include "llvm/ADT/StringExtras.h" 28#include "llvm/Support/MathExtras.h" 29#include "llvm/Support/raw_ostream.h" 30#include "RecordLayoutBuilder.h" 31 32using namespace clang; 33 34enum FloatingRank { 35 FloatRank, DoubleRank, LongDoubleRank 36}; 37 38ASTContext::ASTContext(const LangOptions& LOpts, SourceManager &SM, 39 const TargetInfo &t, 40 IdentifierTable &idents, SelectorTable &sels, 41 Builtin::Context &builtins, 42 bool FreeMem, unsigned size_reserve) : 43 GlobalNestedNameSpecifier(0), CFConstantStringTypeDecl(0), 44 NSConstantStringTypeDecl(0), 45 ObjCFastEnumerationStateTypeDecl(0), FILEDecl(0), jmp_bufDecl(0), 46 sigjmp_bufDecl(0), BlockDescriptorType(0), BlockDescriptorExtendedType(0), 47 SourceMgr(SM), LangOpts(LOpts), FreeMemory(FreeMem), Target(t), 48 Idents(idents), Selectors(sels), 49 BuiltinInfo(builtins), ExternalSource(0), PrintingPolicy(LOpts), 50 LastSDM(0, 0) { 51 ObjCIdRedefinitionType = QualType(); 52 ObjCClassRedefinitionType = QualType(); 53 ObjCSelRedefinitionType = QualType(); 54 if (size_reserve > 0) Types.reserve(size_reserve); 55 TUDecl = TranslationUnitDecl::Create(*this); 56 InitBuiltinTypes(); 57} 58 59ASTContext::~ASTContext() { 60 // Release the DenseMaps associated with DeclContext objects. 61 // FIXME: Is this the ideal solution? 62 ReleaseDeclContextMaps(); 63 64 // Release all of the memory associated with overridden C++ methods. 65 for (llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::iterator 66 OM = OverriddenMethods.begin(), OMEnd = OverriddenMethods.end(); 67 OM != OMEnd; ++OM) 68 OM->second.Destroy(); 69 70 if (FreeMemory) { 71 // Deallocate all the types. 72 while (!Types.empty()) { 73 Types.back()->Destroy(*this); 74 Types.pop_back(); 75 } 76 77 for (llvm::FoldingSet<ExtQuals>::iterator 78 I = ExtQualNodes.begin(), E = ExtQualNodes.end(); I != E; ) { 79 // Increment in loop to prevent using deallocated memory. 80 Deallocate(&*I++); 81 } 82 83 for (llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*>::iterator 84 I = ASTRecordLayouts.begin(), E = ASTRecordLayouts.end(); I != E; ) { 85 // Increment in loop to prevent using deallocated memory. 86 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 87 R->Destroy(*this); 88 } 89 90 for (llvm::DenseMap<const ObjCContainerDecl*, 91 const ASTRecordLayout*>::iterator 92 I = ObjCLayouts.begin(), E = ObjCLayouts.end(); I != E; ) { 93 // Increment in loop to prevent using deallocated memory. 94 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 95 R->Destroy(*this); 96 } 97 } 98 99 // Destroy nested-name-specifiers. 100 for (llvm::FoldingSet<NestedNameSpecifier>::iterator 101 NNS = NestedNameSpecifiers.begin(), 102 NNSEnd = NestedNameSpecifiers.end(); 103 NNS != NNSEnd; ) { 104 // Increment in loop to prevent using deallocated memory. 105 (*NNS++).Destroy(*this); 106 } 107 108 if (GlobalNestedNameSpecifier) 109 GlobalNestedNameSpecifier->Destroy(*this); 110 111 TUDecl->Destroy(*this); 112} 113 114void 115ASTContext::setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source) { 116 ExternalSource.reset(Source.take()); 117} 118 119void ASTContext::PrintStats() const { 120 fprintf(stderr, "*** AST Context Stats:\n"); 121 fprintf(stderr, " %d types total.\n", (int)Types.size()); 122 123 unsigned counts[] = { 124#define TYPE(Name, Parent) 0, 125#define ABSTRACT_TYPE(Name, Parent) 126#include "clang/AST/TypeNodes.def" 127 0 // Extra 128 }; 129 130 for (unsigned i = 0, e = Types.size(); i != e; ++i) { 131 Type *T = Types[i]; 132 counts[(unsigned)T->getTypeClass()]++; 133 } 134 135 unsigned Idx = 0; 136 unsigned TotalBytes = 0; 137#define TYPE(Name, Parent) \ 138 if (counts[Idx]) \ 139 fprintf(stderr, " %d %s types\n", (int)counts[Idx], #Name); \ 140 TotalBytes += counts[Idx] * sizeof(Name##Type); \ 141 ++Idx; 142#define ABSTRACT_TYPE(Name, Parent) 143#include "clang/AST/TypeNodes.def" 144 145 fprintf(stderr, "Total bytes = %d\n", int(TotalBytes)); 146 147 if (ExternalSource.get()) { 148 fprintf(stderr, "\n"); 149 ExternalSource->PrintStats(); 150 } 151} 152 153 154void ASTContext::InitBuiltinType(CanQualType &R, BuiltinType::Kind K) { 155 BuiltinType *Ty = new (*this, TypeAlignment) BuiltinType(K); 156 R = CanQualType::CreateUnsafe(QualType(Ty, 0)); 157 Types.push_back(Ty); 158} 159 160void ASTContext::InitBuiltinTypes() { 161 assert(VoidTy.isNull() && "Context reinitialized?"); 162 163 // C99 6.2.5p19. 164 InitBuiltinType(VoidTy, BuiltinType::Void); 165 166 // C99 6.2.5p2. 167 InitBuiltinType(BoolTy, BuiltinType::Bool); 168 // C99 6.2.5p3. 169 if (LangOpts.CharIsSigned) 170 InitBuiltinType(CharTy, BuiltinType::Char_S); 171 else 172 InitBuiltinType(CharTy, BuiltinType::Char_U); 173 // C99 6.2.5p4. 174 InitBuiltinType(SignedCharTy, BuiltinType::SChar); 175 InitBuiltinType(ShortTy, BuiltinType::Short); 176 InitBuiltinType(IntTy, BuiltinType::Int); 177 InitBuiltinType(LongTy, BuiltinType::Long); 178 InitBuiltinType(LongLongTy, BuiltinType::LongLong); 179 180 // C99 6.2.5p6. 181 InitBuiltinType(UnsignedCharTy, BuiltinType::UChar); 182 InitBuiltinType(UnsignedShortTy, BuiltinType::UShort); 183 InitBuiltinType(UnsignedIntTy, BuiltinType::UInt); 184 InitBuiltinType(UnsignedLongTy, BuiltinType::ULong); 185 InitBuiltinType(UnsignedLongLongTy, BuiltinType::ULongLong); 186 187 // C99 6.2.5p10. 188 InitBuiltinType(FloatTy, BuiltinType::Float); 189 InitBuiltinType(DoubleTy, BuiltinType::Double); 190 InitBuiltinType(LongDoubleTy, BuiltinType::LongDouble); 191 192 // GNU extension, 128-bit integers. 193 InitBuiltinType(Int128Ty, BuiltinType::Int128); 194 InitBuiltinType(UnsignedInt128Ty, BuiltinType::UInt128); 195 196 if (LangOpts.CPlusPlus) // C++ 3.9.1p5 197 InitBuiltinType(WCharTy, BuiltinType::WChar); 198 else // C99 199 WCharTy = getFromTargetType(Target.getWCharType()); 200 201 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 202 InitBuiltinType(Char16Ty, BuiltinType::Char16); 203 else // C99 204 Char16Ty = getFromTargetType(Target.getChar16Type()); 205 206 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 207 InitBuiltinType(Char32Ty, BuiltinType::Char32); 208 else // C99 209 Char32Ty = getFromTargetType(Target.getChar32Type()); 210 211 // Placeholder type for functions. 212 InitBuiltinType(OverloadTy, BuiltinType::Overload); 213 214 // Placeholder type for type-dependent expressions whose type is 215 // completely unknown. No code should ever check a type against 216 // DependentTy and users should never see it; however, it is here to 217 // help diagnose failures to properly check for type-dependent 218 // expressions. 219 InitBuiltinType(DependentTy, BuiltinType::Dependent); 220 221 // Placeholder type for C++0x auto declarations whose real type has 222 // not yet been deduced. 223 InitBuiltinType(UndeducedAutoTy, BuiltinType::UndeducedAuto); 224 225 // C99 6.2.5p11. 226 FloatComplexTy = getComplexType(FloatTy); 227 DoubleComplexTy = getComplexType(DoubleTy); 228 LongDoubleComplexTy = getComplexType(LongDoubleTy); 229 230 BuiltinVaListType = QualType(); 231 232 // "Builtin" typedefs set by Sema::ActOnTranslationUnitScope(). 233 ObjCIdTypedefType = QualType(); 234 ObjCClassTypedefType = QualType(); 235 ObjCSelTypedefType = QualType(); 236 237 // Builtin types for 'id', 'Class', and 'SEL'. 238 InitBuiltinType(ObjCBuiltinIdTy, BuiltinType::ObjCId); 239 InitBuiltinType(ObjCBuiltinClassTy, BuiltinType::ObjCClass); 240 InitBuiltinType(ObjCBuiltinSelTy, BuiltinType::ObjCSel); 241 242 ObjCConstantStringType = QualType(); 243 244 // void * type 245 VoidPtrTy = getPointerType(VoidTy); 246 247 // nullptr type (C++0x 2.14.7) 248 InitBuiltinType(NullPtrTy, BuiltinType::NullPtr); 249} 250 251MemberSpecializationInfo * 252ASTContext::getInstantiatedFromStaticDataMember(const VarDecl *Var) { 253 assert(Var->isStaticDataMember() && "Not a static data member"); 254 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *>::iterator Pos 255 = InstantiatedFromStaticDataMember.find(Var); 256 if (Pos == InstantiatedFromStaticDataMember.end()) 257 return 0; 258 259 return Pos->second; 260} 261 262void 263ASTContext::setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 264 TemplateSpecializationKind TSK) { 265 assert(Inst->isStaticDataMember() && "Not a static data member"); 266 assert(Tmpl->isStaticDataMember() && "Not a static data member"); 267 assert(!InstantiatedFromStaticDataMember[Inst] && 268 "Already noted what static data member was instantiated from"); 269 InstantiatedFromStaticDataMember[Inst] 270 = new (*this) MemberSpecializationInfo(Tmpl, TSK); 271} 272 273NamedDecl * 274ASTContext::getInstantiatedFromUsingDecl(UsingDecl *UUD) { 275 llvm::DenseMap<UsingDecl *, NamedDecl *>::const_iterator Pos 276 = InstantiatedFromUsingDecl.find(UUD); 277 if (Pos == InstantiatedFromUsingDecl.end()) 278 return 0; 279 280 return Pos->second; 281} 282 283void 284ASTContext::setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern) { 285 assert((isa<UsingDecl>(Pattern) || 286 isa<UnresolvedUsingValueDecl>(Pattern) || 287 isa<UnresolvedUsingTypenameDecl>(Pattern)) && 288 "pattern decl is not a using decl"); 289 assert(!InstantiatedFromUsingDecl[Inst] && "pattern already exists"); 290 InstantiatedFromUsingDecl[Inst] = Pattern; 291} 292 293UsingShadowDecl * 294ASTContext::getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst) { 295 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*>::const_iterator Pos 296 = InstantiatedFromUsingShadowDecl.find(Inst); 297 if (Pos == InstantiatedFromUsingShadowDecl.end()) 298 return 0; 299 300 return Pos->second; 301} 302 303void 304ASTContext::setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 305 UsingShadowDecl *Pattern) { 306 assert(!InstantiatedFromUsingShadowDecl[Inst] && "pattern already exists"); 307 InstantiatedFromUsingShadowDecl[Inst] = Pattern; 308} 309 310FieldDecl *ASTContext::getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field) { 311 llvm::DenseMap<FieldDecl *, FieldDecl *>::iterator Pos 312 = InstantiatedFromUnnamedFieldDecl.find(Field); 313 if (Pos == InstantiatedFromUnnamedFieldDecl.end()) 314 return 0; 315 316 return Pos->second; 317} 318 319void ASTContext::setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, 320 FieldDecl *Tmpl) { 321 assert(!Inst->getDeclName() && "Instantiated field decl is not unnamed"); 322 assert(!Tmpl->getDeclName() && "Template field decl is not unnamed"); 323 assert(!InstantiatedFromUnnamedFieldDecl[Inst] && 324 "Already noted what unnamed field was instantiated from"); 325 326 InstantiatedFromUnnamedFieldDecl[Inst] = Tmpl; 327} 328 329ASTContext::overridden_cxx_method_iterator 330ASTContext::overridden_methods_begin(const CXXMethodDecl *Method) const { 331 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 332 = OverriddenMethods.find(Method); 333 if (Pos == OverriddenMethods.end()) 334 return 0; 335 336 return Pos->second.begin(); 337} 338 339ASTContext::overridden_cxx_method_iterator 340ASTContext::overridden_methods_end(const CXXMethodDecl *Method) const { 341 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 342 = OverriddenMethods.find(Method); 343 if (Pos == OverriddenMethods.end()) 344 return 0; 345 346 return Pos->second.end(); 347} 348 349void ASTContext::addOverriddenMethod(const CXXMethodDecl *Method, 350 const CXXMethodDecl *Overridden) { 351 OverriddenMethods[Method].push_back(Overridden); 352} 353 354namespace { 355 class BeforeInTranslationUnit 356 : std::binary_function<SourceRange, SourceRange, bool> { 357 SourceManager *SourceMgr; 358 359 public: 360 explicit BeforeInTranslationUnit(SourceManager *SM) : SourceMgr(SM) { } 361 362 bool operator()(SourceRange X, SourceRange Y) { 363 return SourceMgr->isBeforeInTranslationUnit(X.getBegin(), Y.getBegin()); 364 } 365 }; 366} 367 368//===----------------------------------------------------------------------===// 369// Type Sizing and Analysis 370//===----------------------------------------------------------------------===// 371 372/// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 373/// scalar floating point type. 374const llvm::fltSemantics &ASTContext::getFloatTypeSemantics(QualType T) const { 375 const BuiltinType *BT = T->getAs<BuiltinType>(); 376 assert(BT && "Not a floating point type!"); 377 switch (BT->getKind()) { 378 default: assert(0 && "Not a floating point type!"); 379 case BuiltinType::Float: return Target.getFloatFormat(); 380 case BuiltinType::Double: return Target.getDoubleFormat(); 381 case BuiltinType::LongDouble: return Target.getLongDoubleFormat(); 382 } 383} 384 385/// getDeclAlign - Return a conservative estimate of the alignment of the 386/// specified decl. Note that bitfields do not have a valid alignment, so 387/// this method will assert on them. 388/// If @p RefAsPointee, references are treated like their underlying type 389/// (for alignof), else they're treated like pointers (for CodeGen). 390CharUnits ASTContext::getDeclAlign(const Decl *D, bool RefAsPointee) { 391 unsigned Align = Target.getCharWidth(); 392 393 if (const AlignedAttr* AA = D->getAttr<AlignedAttr>()) 394 Align = std::max(Align, AA->getMaxAlignment()); 395 396 if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) { 397 QualType T = VD->getType(); 398 if (const ReferenceType* RT = T->getAs<ReferenceType>()) { 399 if (RefAsPointee) 400 T = RT->getPointeeType(); 401 else 402 T = getPointerType(RT->getPointeeType()); 403 } 404 if (!T->isIncompleteType() && !T->isFunctionType()) { 405 // Incomplete or function types default to 1. 406 while (isa<VariableArrayType>(T) || isa<IncompleteArrayType>(T)) 407 T = cast<ArrayType>(T)->getElementType(); 408 409 Align = std::max(Align, getPreferredTypeAlign(T.getTypePtr())); 410 } 411 if (const FieldDecl *FD = dyn_cast<FieldDecl>(VD)) { 412 // In the case of a field in a packed struct, we want the minimum 413 // of the alignment of the field and the alignment of the struct. 414 Align = std::min(Align, 415 getPreferredTypeAlign(FD->getParent()->getTypeForDecl())); 416 } 417 } 418 419 return CharUnits::fromQuantity(Align / Target.getCharWidth()); 420} 421 422/// getTypeSize - Return the size of the specified type, in bits. This method 423/// does not work on incomplete types. 424/// 425/// FIXME: Pointers into different addr spaces could have different sizes and 426/// alignment requirements: getPointerInfo should take an AddrSpace, this 427/// should take a QualType, &c. 428std::pair<uint64_t, unsigned> 429ASTContext::getTypeInfo(const Type *T) { 430 uint64_t Width=0; 431 unsigned Align=8; 432 switch (T->getTypeClass()) { 433#define TYPE(Class, Base) 434#define ABSTRACT_TYPE(Class, Base) 435#define NON_CANONICAL_TYPE(Class, Base) 436#define DEPENDENT_TYPE(Class, Base) case Type::Class: 437#include "clang/AST/TypeNodes.def" 438 assert(false && "Should not see dependent types"); 439 break; 440 441 case Type::FunctionNoProto: 442 case Type::FunctionProto: 443 // GCC extension: alignof(function) = 32 bits 444 Width = 0; 445 Align = 32; 446 break; 447 448 case Type::IncompleteArray: 449 case Type::VariableArray: 450 Width = 0; 451 Align = getTypeAlign(cast<ArrayType>(T)->getElementType()); 452 break; 453 454 case Type::ConstantArray: { 455 const ConstantArrayType *CAT = cast<ConstantArrayType>(T); 456 457 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(CAT->getElementType()); 458 Width = EltInfo.first*CAT->getSize().getZExtValue(); 459 Align = EltInfo.second; 460 break; 461 } 462 case Type::ExtVector: 463 case Type::Vector: { 464 const VectorType *VT = cast<VectorType>(T); 465 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(VT->getElementType()); 466 Width = EltInfo.first*VT->getNumElements(); 467 Align = Width; 468 // If the alignment is not a power of 2, round up to the next power of 2. 469 // This happens for non-power-of-2 length vectors. 470 if (Align & (Align-1)) { 471 Align = llvm::NextPowerOf2(Align); 472 Width = llvm::RoundUpToAlignment(Width, Align); 473 } 474 break; 475 } 476 477 case Type::Builtin: 478 switch (cast<BuiltinType>(T)->getKind()) { 479 default: assert(0 && "Unknown builtin type!"); 480 case BuiltinType::Void: 481 // GCC extension: alignof(void) = 8 bits. 482 Width = 0; 483 Align = 8; 484 break; 485 486 case BuiltinType::Bool: 487 Width = Target.getBoolWidth(); 488 Align = Target.getBoolAlign(); 489 break; 490 case BuiltinType::Char_S: 491 case BuiltinType::Char_U: 492 case BuiltinType::UChar: 493 case BuiltinType::SChar: 494 Width = Target.getCharWidth(); 495 Align = Target.getCharAlign(); 496 break; 497 case BuiltinType::WChar: 498 Width = Target.getWCharWidth(); 499 Align = Target.getWCharAlign(); 500 break; 501 case BuiltinType::Char16: 502 Width = Target.getChar16Width(); 503 Align = Target.getChar16Align(); 504 break; 505 case BuiltinType::Char32: 506 Width = Target.getChar32Width(); 507 Align = Target.getChar32Align(); 508 break; 509 case BuiltinType::UShort: 510 case BuiltinType::Short: 511 Width = Target.getShortWidth(); 512 Align = Target.getShortAlign(); 513 break; 514 case BuiltinType::UInt: 515 case BuiltinType::Int: 516 Width = Target.getIntWidth(); 517 Align = Target.getIntAlign(); 518 break; 519 case BuiltinType::ULong: 520 case BuiltinType::Long: 521 Width = Target.getLongWidth(); 522 Align = Target.getLongAlign(); 523 break; 524 case BuiltinType::ULongLong: 525 case BuiltinType::LongLong: 526 Width = Target.getLongLongWidth(); 527 Align = Target.getLongLongAlign(); 528 break; 529 case BuiltinType::Int128: 530 case BuiltinType::UInt128: 531 Width = 128; 532 Align = 128; // int128_t is 128-bit aligned on all targets. 533 break; 534 case BuiltinType::Float: 535 Width = Target.getFloatWidth(); 536 Align = Target.getFloatAlign(); 537 break; 538 case BuiltinType::Double: 539 Width = Target.getDoubleWidth(); 540 Align = Target.getDoubleAlign(); 541 break; 542 case BuiltinType::LongDouble: 543 Width = Target.getLongDoubleWidth(); 544 Align = Target.getLongDoubleAlign(); 545 break; 546 case BuiltinType::NullPtr: 547 Width = Target.getPointerWidth(0); // C++ 3.9.1p11: sizeof(nullptr_t) 548 Align = Target.getPointerAlign(0); // == sizeof(void*) 549 break; 550 } 551 break; 552 case Type::ObjCObjectPointer: 553 Width = Target.getPointerWidth(0); 554 Align = Target.getPointerAlign(0); 555 break; 556 case Type::BlockPointer: { 557 unsigned AS = cast<BlockPointerType>(T)->getPointeeType().getAddressSpace(); 558 Width = Target.getPointerWidth(AS); 559 Align = Target.getPointerAlign(AS); 560 break; 561 } 562 case Type::LValueReference: 563 case Type::RValueReference: { 564 // alignof and sizeof should never enter this code path here, so we go 565 // the pointer route. 566 unsigned AS = cast<ReferenceType>(T)->getPointeeType().getAddressSpace(); 567 Width = Target.getPointerWidth(AS); 568 Align = Target.getPointerAlign(AS); 569 break; 570 } 571 case Type::Pointer: { 572 unsigned AS = cast<PointerType>(T)->getPointeeType().getAddressSpace(); 573 Width = Target.getPointerWidth(AS); 574 Align = Target.getPointerAlign(AS); 575 break; 576 } 577 case Type::MemberPointer: { 578 QualType Pointee = cast<MemberPointerType>(T)->getPointeeType(); 579 std::pair<uint64_t, unsigned> PtrDiffInfo = 580 getTypeInfo(getPointerDiffType()); 581 Width = PtrDiffInfo.first; 582 if (Pointee->isFunctionType()) 583 Width *= 2; 584 Align = PtrDiffInfo.second; 585 break; 586 } 587 case Type::Complex: { 588 // Complex types have the same alignment as their elements, but twice the 589 // size. 590 std::pair<uint64_t, unsigned> EltInfo = 591 getTypeInfo(cast<ComplexType>(T)->getElementType()); 592 Width = EltInfo.first*2; 593 Align = EltInfo.second; 594 break; 595 } 596 case Type::ObjCInterface: { 597 const ObjCInterfaceType *ObjCI = cast<ObjCInterfaceType>(T); 598 const ASTRecordLayout &Layout = getASTObjCInterfaceLayout(ObjCI->getDecl()); 599 Width = Layout.getSize(); 600 Align = Layout.getAlignment(); 601 break; 602 } 603 case Type::Record: 604 case Type::Enum: { 605 const TagType *TT = cast<TagType>(T); 606 607 if (TT->getDecl()->isInvalidDecl()) { 608 Width = 1; 609 Align = 1; 610 break; 611 } 612 613 if (const EnumType *ET = dyn_cast<EnumType>(TT)) 614 return getTypeInfo(ET->getDecl()->getIntegerType()); 615 616 const RecordType *RT = cast<RecordType>(TT); 617 const ASTRecordLayout &Layout = getASTRecordLayout(RT->getDecl()); 618 Width = Layout.getSize(); 619 Align = Layout.getAlignment(); 620 break; 621 } 622 623 case Type::SubstTemplateTypeParm: 624 return getTypeInfo(cast<SubstTemplateTypeParmType>(T)-> 625 getReplacementType().getTypePtr()); 626 627 case Type::Elaborated: 628 return getTypeInfo(cast<ElaboratedType>(T)->getUnderlyingType() 629 .getTypePtr()); 630 631 case Type::Typedef: { 632 const TypedefDecl *Typedef = cast<TypedefType>(T)->getDecl(); 633 if (const AlignedAttr *Aligned = Typedef->getAttr<AlignedAttr>()) { 634 Align = std::max(Aligned->getMaxAlignment(), 635 getTypeAlign(Typedef->getUnderlyingType().getTypePtr())); 636 Width = getTypeSize(Typedef->getUnderlyingType().getTypePtr()); 637 } else 638 return getTypeInfo(Typedef->getUnderlyingType().getTypePtr()); 639 break; 640 } 641 642 case Type::TypeOfExpr: 643 return getTypeInfo(cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType() 644 .getTypePtr()); 645 646 case Type::TypeOf: 647 return getTypeInfo(cast<TypeOfType>(T)->getUnderlyingType().getTypePtr()); 648 649 case Type::Decltype: 650 return getTypeInfo(cast<DecltypeType>(T)->getUnderlyingExpr()->getType() 651 .getTypePtr()); 652 653 case Type::QualifiedName: 654 return getTypeInfo(cast<QualifiedNameType>(T)->getNamedType().getTypePtr()); 655 656 case Type::TemplateSpecialization: 657 assert(getCanonicalType(T) != T && 658 "Cannot request the size of a dependent type"); 659 // FIXME: this is likely to be wrong once we support template 660 // aliases, since a template alias could refer to a typedef that 661 // has an __aligned__ attribute on it. 662 return getTypeInfo(getCanonicalType(T)); 663 } 664 665 assert(Align && (Align & (Align-1)) == 0 && "Alignment must be power of 2"); 666 return std::make_pair(Width, Align); 667} 668 669/// getTypeSizeInChars - Return the size of the specified type, in characters. 670/// This method does not work on incomplete types. 671CharUnits ASTContext::getTypeSizeInChars(QualType T) { 672 return CharUnits::fromQuantity(getTypeSize(T) / getCharWidth()); 673} 674CharUnits ASTContext::getTypeSizeInChars(const Type *T) { 675 return CharUnits::fromQuantity(getTypeSize(T) / getCharWidth()); 676} 677 678/// getTypeAlignInChars - Return the ABI-specified alignment of a type, in 679/// characters. This method does not work on incomplete types. 680CharUnits ASTContext::getTypeAlignInChars(QualType T) { 681 return CharUnits::fromQuantity(getTypeAlign(T) / getCharWidth()); 682} 683CharUnits ASTContext::getTypeAlignInChars(const Type *T) { 684 return CharUnits::fromQuantity(getTypeAlign(T) / getCharWidth()); 685} 686 687/// getPreferredTypeAlign - Return the "preferred" alignment of the specified 688/// type for the current target in bits. This can be different than the ABI 689/// alignment in cases where it is beneficial for performance to overalign 690/// a data type. 691unsigned ASTContext::getPreferredTypeAlign(const Type *T) { 692 unsigned ABIAlign = getTypeAlign(T); 693 694 // Double and long long should be naturally aligned if possible. 695 if (const ComplexType* CT = T->getAs<ComplexType>()) 696 T = CT->getElementType().getTypePtr(); 697 if (T->isSpecificBuiltinType(BuiltinType::Double) || 698 T->isSpecificBuiltinType(BuiltinType::LongLong)) 699 return std::max(ABIAlign, (unsigned)getTypeSize(T)); 700 701 return ABIAlign; 702} 703 704static void CollectLocalObjCIvars(ASTContext *Ctx, 705 const ObjCInterfaceDecl *OI, 706 llvm::SmallVectorImpl<FieldDecl*> &Fields) { 707 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 708 E = OI->ivar_end(); I != E; ++I) { 709 ObjCIvarDecl *IVDecl = *I; 710 if (!IVDecl->isInvalidDecl()) 711 Fields.push_back(cast<FieldDecl>(IVDecl)); 712 } 713} 714 715void ASTContext::CollectObjCIvars(const ObjCInterfaceDecl *OI, 716 llvm::SmallVectorImpl<FieldDecl*> &Fields) { 717 if (const ObjCInterfaceDecl *SuperClass = OI->getSuperClass()) 718 CollectObjCIvars(SuperClass, Fields); 719 CollectLocalObjCIvars(this, OI, Fields); 720} 721 722/// ShallowCollectObjCIvars - 723/// Collect all ivars, including those synthesized, in the current class. 724/// 725void ASTContext::ShallowCollectObjCIvars(const ObjCInterfaceDecl *OI, 726 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 727 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 728 E = OI->ivar_end(); I != E; ++I) { 729 Ivars.push_back(*I); 730 } 731 732 CollectNonClassIvars(OI, Ivars); 733} 734 735/// CollectNonClassIvars - 736/// This routine collects all other ivars which are not declared in the class. 737/// This includes synthesized ivars (via @synthesize) and those in 738// class's @implementation. 739/// 740void ASTContext::CollectNonClassIvars(const ObjCInterfaceDecl *OI, 741 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 742 // Find ivars declared in class extension. 743 if (const ObjCCategoryDecl *CDecl = OI->getClassExtension()) { 744 for (ObjCCategoryDecl::ivar_iterator I = CDecl->ivar_begin(), 745 E = CDecl->ivar_end(); I != E; ++I) { 746 Ivars.push_back(*I); 747 } 748 } 749 750 // Also add any ivar defined in this class's implementation. This 751 // includes synthesized ivars. 752 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) { 753 for (ObjCImplementationDecl::ivar_iterator I = ImplDecl->ivar_begin(), 754 E = ImplDecl->ivar_end(); I != E; ++I) 755 Ivars.push_back(*I); 756 } 757} 758 759/// CollectInheritedProtocols - Collect all protocols in current class and 760/// those inherited by it. 761void ASTContext::CollectInheritedProtocols(const Decl *CDecl, 762 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols) { 763 if (const ObjCInterfaceDecl *OI = dyn_cast<ObjCInterfaceDecl>(CDecl)) { 764 for (ObjCInterfaceDecl::protocol_iterator P = OI->protocol_begin(), 765 PE = OI->protocol_end(); P != PE; ++P) { 766 ObjCProtocolDecl *Proto = (*P); 767 Protocols.insert(Proto); 768 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 769 PE = Proto->protocol_end(); P != PE; ++P) { 770 Protocols.insert(*P); 771 CollectInheritedProtocols(*P, Protocols); 772 } 773 } 774 775 // Categories of this Interface. 776 for (const ObjCCategoryDecl *CDeclChain = OI->getCategoryList(); 777 CDeclChain; CDeclChain = CDeclChain->getNextClassCategory()) 778 CollectInheritedProtocols(CDeclChain, Protocols); 779 if (ObjCInterfaceDecl *SD = OI->getSuperClass()) 780 while (SD) { 781 CollectInheritedProtocols(SD, Protocols); 782 SD = SD->getSuperClass(); 783 } 784 } else if (const ObjCCategoryDecl *OC = dyn_cast<ObjCCategoryDecl>(CDecl)) { 785 for (ObjCInterfaceDecl::protocol_iterator P = OC->protocol_begin(), 786 PE = OC->protocol_end(); P != PE; ++P) { 787 ObjCProtocolDecl *Proto = (*P); 788 Protocols.insert(Proto); 789 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 790 PE = Proto->protocol_end(); P != PE; ++P) 791 CollectInheritedProtocols(*P, Protocols); 792 } 793 } else if (const ObjCProtocolDecl *OP = dyn_cast<ObjCProtocolDecl>(CDecl)) { 794 for (ObjCProtocolDecl::protocol_iterator P = OP->protocol_begin(), 795 PE = OP->protocol_end(); P != PE; ++P) { 796 ObjCProtocolDecl *Proto = (*P); 797 Protocols.insert(Proto); 798 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 799 PE = Proto->protocol_end(); P != PE; ++P) 800 CollectInheritedProtocols(*P, Protocols); 801 } 802 } 803} 804 805unsigned ASTContext::CountNonClassIvars(const ObjCInterfaceDecl *OI) { 806 unsigned count = 0; 807 // Count ivars declared in class extension. 808 if (const ObjCCategoryDecl *CDecl = OI->getClassExtension()) 809 count += CDecl->ivar_size(); 810 811 // Count ivar defined in this class's implementation. This 812 // includes synthesized ivars. 813 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) 814 count += ImplDecl->ivar_size(); 815 816 return count; 817} 818 819/// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 820ObjCImplementationDecl *ASTContext::getObjCImplementation(ObjCInterfaceDecl *D) { 821 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 822 I = ObjCImpls.find(D); 823 if (I != ObjCImpls.end()) 824 return cast<ObjCImplementationDecl>(I->second); 825 return 0; 826} 827/// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 828ObjCCategoryImplDecl *ASTContext::getObjCImplementation(ObjCCategoryDecl *D) { 829 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 830 I = ObjCImpls.find(D); 831 if (I != ObjCImpls.end()) 832 return cast<ObjCCategoryImplDecl>(I->second); 833 return 0; 834} 835 836/// \brief Set the implementation of ObjCInterfaceDecl. 837void ASTContext::setObjCImplementation(ObjCInterfaceDecl *IFaceD, 838 ObjCImplementationDecl *ImplD) { 839 assert(IFaceD && ImplD && "Passed null params"); 840 ObjCImpls[IFaceD] = ImplD; 841} 842/// \brief Set the implementation of ObjCCategoryDecl. 843void ASTContext::setObjCImplementation(ObjCCategoryDecl *CatD, 844 ObjCCategoryImplDecl *ImplD) { 845 assert(CatD && ImplD && "Passed null params"); 846 ObjCImpls[CatD] = ImplD; 847} 848 849/// \brief Allocate an uninitialized TypeSourceInfo. 850/// 851/// The caller should initialize the memory held by TypeSourceInfo using 852/// the TypeLoc wrappers. 853/// 854/// \param T the type that will be the basis for type source info. This type 855/// should refer to how the declarator was written in source code, not to 856/// what type semantic analysis resolved the declarator to. 857TypeSourceInfo *ASTContext::CreateTypeSourceInfo(QualType T, 858 unsigned DataSize) { 859 if (!DataSize) 860 DataSize = TypeLoc::getFullDataSizeForType(T); 861 else 862 assert(DataSize == TypeLoc::getFullDataSizeForType(T) && 863 "incorrect data size provided to CreateTypeSourceInfo!"); 864 865 TypeSourceInfo *TInfo = 866 (TypeSourceInfo*)BumpAlloc.Allocate(sizeof(TypeSourceInfo) + DataSize, 8); 867 new (TInfo) TypeSourceInfo(T); 868 return TInfo; 869} 870 871TypeSourceInfo *ASTContext::getTrivialTypeSourceInfo(QualType T, 872 SourceLocation L) { 873 TypeSourceInfo *DI = CreateTypeSourceInfo(T); 874 DI->getTypeLoc().initialize(L); 875 return DI; 876} 877 878/// getInterfaceLayoutImpl - Get or compute information about the 879/// layout of the given interface. 880/// 881/// \param Impl - If given, also include the layout of the interface's 882/// implementation. This may differ by including synthesized ivars. 883const ASTRecordLayout & 884ASTContext::getObjCLayout(const ObjCInterfaceDecl *D, 885 const ObjCImplementationDecl *Impl) { 886 assert(!D->isForwardDecl() && "Invalid interface decl!"); 887 888 // Look up this layout, if already laid out, return what we have. 889 ObjCContainerDecl *Key = 890 Impl ? (ObjCContainerDecl*) Impl : (ObjCContainerDecl*) D; 891 if (const ASTRecordLayout *Entry = ObjCLayouts[Key]) 892 return *Entry; 893 894 // Add in synthesized ivar count if laying out an implementation. 895 if (Impl) { 896 unsigned SynthCount = CountNonClassIvars(D); 897 // If there aren't any sythesized ivars then reuse the interface 898 // entry. Note we can't cache this because we simply free all 899 // entries later; however we shouldn't look up implementations 900 // frequently. 901 if (SynthCount == 0) 902 return getObjCLayout(D, 0); 903 } 904 905 const ASTRecordLayout *NewEntry = 906 ASTRecordLayoutBuilder::ComputeLayout(*this, D, Impl); 907 ObjCLayouts[Key] = NewEntry; 908 909 return *NewEntry; 910} 911 912const ASTRecordLayout & 913ASTContext::getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) { 914 return getObjCLayout(D, 0); 915} 916 917const ASTRecordLayout & 918ASTContext::getASTObjCImplementationLayout(const ObjCImplementationDecl *D) { 919 return getObjCLayout(D->getClassInterface(), D); 920} 921 922/// getASTRecordLayout - Get or compute information about the layout of the 923/// specified record (struct/union/class), which indicates its size and field 924/// position information. 925const ASTRecordLayout &ASTContext::getASTRecordLayout(const RecordDecl *D) { 926 D = D->getDefinition(); 927 assert(D && "Cannot get layout of forward declarations!"); 928 929 // Look up this layout, if already laid out, return what we have. 930 // Note that we can't save a reference to the entry because this function 931 // is recursive. 932 const ASTRecordLayout *Entry = ASTRecordLayouts[D]; 933 if (Entry) return *Entry; 934 935 const ASTRecordLayout *NewEntry = 936 ASTRecordLayoutBuilder::ComputeLayout(*this, D); 937 ASTRecordLayouts[D] = NewEntry; 938 939 if (getLangOptions().DumpRecordLayouts) { 940 llvm::errs() << "\n*** Dumping AST Record Layout\n"; 941 DumpRecordLayout(D, llvm::errs()); 942 } 943 944 return *NewEntry; 945} 946 947const CXXMethodDecl *ASTContext::getKeyFunction(const CXXRecordDecl *RD) { 948 RD = cast<CXXRecordDecl>(RD->getDefinition()); 949 assert(RD && "Cannot get key function for forward declarations!"); 950 951 const CXXMethodDecl *&Entry = KeyFunctions[RD]; 952 if (!Entry) 953 Entry = ASTRecordLayoutBuilder::ComputeKeyFunction(RD); 954 else 955 assert(Entry == ASTRecordLayoutBuilder::ComputeKeyFunction(RD) && 956 "Key function changed!"); 957 958 return Entry; 959} 960 961//===----------------------------------------------------------------------===// 962// Type creation/memoization methods 963//===----------------------------------------------------------------------===// 964 965QualType ASTContext::getExtQualType(const Type *TypeNode, Qualifiers Quals) { 966 unsigned Fast = Quals.getFastQualifiers(); 967 Quals.removeFastQualifiers(); 968 969 // Check if we've already instantiated this type. 970 llvm::FoldingSetNodeID ID; 971 ExtQuals::Profile(ID, TypeNode, Quals); 972 void *InsertPos = 0; 973 if (ExtQuals *EQ = ExtQualNodes.FindNodeOrInsertPos(ID, InsertPos)) { 974 assert(EQ->getQualifiers() == Quals); 975 QualType T = QualType(EQ, Fast); 976 return T; 977 } 978 979 ExtQuals *New = new (*this, TypeAlignment) ExtQuals(*this, TypeNode, Quals); 980 ExtQualNodes.InsertNode(New, InsertPos); 981 QualType T = QualType(New, Fast); 982 return T; 983} 984 985QualType ASTContext::getVolatileType(QualType T) { 986 QualType CanT = getCanonicalType(T); 987 if (CanT.isVolatileQualified()) return T; 988 989 QualifierCollector Quals; 990 const Type *TypeNode = Quals.strip(T); 991 Quals.addVolatile(); 992 993 return getExtQualType(TypeNode, Quals); 994} 995 996QualType ASTContext::getAddrSpaceQualType(QualType T, unsigned AddressSpace) { 997 QualType CanT = getCanonicalType(T); 998 if (CanT.getAddressSpace() == AddressSpace) 999 return T; 1000 1001 // If we are composing extended qualifiers together, merge together 1002 // into one ExtQuals node. 1003 QualifierCollector Quals; 1004 const Type *TypeNode = Quals.strip(T); 1005 1006 // If this type already has an address space specified, it cannot get 1007 // another one. 1008 assert(!Quals.hasAddressSpace() && 1009 "Type cannot be in multiple addr spaces!"); 1010 Quals.addAddressSpace(AddressSpace); 1011 1012 return getExtQualType(TypeNode, Quals); 1013} 1014 1015QualType ASTContext::getObjCGCQualType(QualType T, 1016 Qualifiers::GC GCAttr) { 1017 QualType CanT = getCanonicalType(T); 1018 if (CanT.getObjCGCAttr() == GCAttr) 1019 return T; 1020 1021 if (T->isPointerType()) { 1022 QualType Pointee = T->getAs<PointerType>()->getPointeeType(); 1023 if (Pointee->isAnyPointerType()) { 1024 QualType ResultType = getObjCGCQualType(Pointee, GCAttr); 1025 return getPointerType(ResultType); 1026 } 1027 } 1028 1029 // If we are composing extended qualifiers together, merge together 1030 // into one ExtQuals node. 1031 QualifierCollector Quals; 1032 const Type *TypeNode = Quals.strip(T); 1033 1034 // If this type already has an ObjCGC specified, it cannot get 1035 // another one. 1036 assert(!Quals.hasObjCGCAttr() && 1037 "Type cannot have multiple ObjCGCs!"); 1038 Quals.addObjCGCAttr(GCAttr); 1039 1040 return getExtQualType(TypeNode, Quals); 1041} 1042 1043static QualType getExtFunctionType(ASTContext& Context, QualType T, 1044 const FunctionType::ExtInfo &Info) { 1045 QualType ResultType; 1046 if (const PointerType *Pointer = T->getAs<PointerType>()) { 1047 QualType Pointee = Pointer->getPointeeType(); 1048 ResultType = getExtFunctionType(Context, Pointee, Info); 1049 if (ResultType == Pointee) 1050 return T; 1051 1052 ResultType = Context.getPointerType(ResultType); 1053 } else if (const BlockPointerType *BlockPointer 1054 = T->getAs<BlockPointerType>()) { 1055 QualType Pointee = BlockPointer->getPointeeType(); 1056 ResultType = getExtFunctionType(Context, Pointee, Info); 1057 if (ResultType == Pointee) 1058 return T; 1059 1060 ResultType = Context.getBlockPointerType(ResultType); 1061 } else if (const FunctionType *F = T->getAs<FunctionType>()) { 1062 if (F->getExtInfo() == Info) 1063 return T; 1064 1065 if (const FunctionNoProtoType *FNPT = dyn_cast<FunctionNoProtoType>(F)) { 1066 ResultType = Context.getFunctionNoProtoType(FNPT->getResultType(), 1067 Info); 1068 } else { 1069 const FunctionProtoType *FPT = cast<FunctionProtoType>(F); 1070 ResultType 1071 = Context.getFunctionType(FPT->getResultType(), FPT->arg_type_begin(), 1072 FPT->getNumArgs(), FPT->isVariadic(), 1073 FPT->getTypeQuals(), 1074 FPT->hasExceptionSpec(), 1075 FPT->hasAnyExceptionSpec(), 1076 FPT->getNumExceptions(), 1077 FPT->exception_begin(), 1078 Info); 1079 } 1080 } else 1081 return T; 1082 1083 return Context.getQualifiedType(ResultType, T.getLocalQualifiers()); 1084} 1085 1086QualType ASTContext::getNoReturnType(QualType T, bool AddNoReturn) { 1087 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1088 return getExtFunctionType(*this, T, 1089 Info.withNoReturn(AddNoReturn)); 1090} 1091 1092QualType ASTContext::getCallConvType(QualType T, CallingConv CallConv) { 1093 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1094 return getExtFunctionType(*this, T, 1095 Info.withCallingConv(CallConv)); 1096} 1097 1098QualType ASTContext::getRegParmType(QualType T, unsigned RegParm) { 1099 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1100 return getExtFunctionType(*this, T, 1101 Info.withRegParm(RegParm)); 1102} 1103 1104/// getComplexType - Return the uniqued reference to the type for a complex 1105/// number with the specified element type. 1106QualType ASTContext::getComplexType(QualType T) { 1107 // Unique pointers, to guarantee there is only one pointer of a particular 1108 // structure. 1109 llvm::FoldingSetNodeID ID; 1110 ComplexType::Profile(ID, T); 1111 1112 void *InsertPos = 0; 1113 if (ComplexType *CT = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos)) 1114 return QualType(CT, 0); 1115 1116 // If the pointee type isn't canonical, this won't be a canonical type either, 1117 // so fill in the canonical type field. 1118 QualType Canonical; 1119 if (!T.isCanonical()) { 1120 Canonical = getComplexType(getCanonicalType(T)); 1121 1122 // Get the new insert position for the node we care about. 1123 ComplexType *NewIP = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos); 1124 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1125 } 1126 ComplexType *New = new (*this, TypeAlignment) ComplexType(T, Canonical); 1127 Types.push_back(New); 1128 ComplexTypes.InsertNode(New, InsertPos); 1129 return QualType(New, 0); 1130} 1131 1132/// getPointerType - Return the uniqued reference to the type for a pointer to 1133/// the specified type. 1134QualType ASTContext::getPointerType(QualType T) { 1135 // Unique pointers, to guarantee there is only one pointer of a particular 1136 // structure. 1137 llvm::FoldingSetNodeID ID; 1138 PointerType::Profile(ID, T); 1139 1140 void *InsertPos = 0; 1141 if (PointerType *PT = PointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1142 return QualType(PT, 0); 1143 1144 // If the pointee type isn't canonical, this won't be a canonical type either, 1145 // so fill in the canonical type field. 1146 QualType Canonical; 1147 if (!T.isCanonical()) { 1148 Canonical = getPointerType(getCanonicalType(T)); 1149 1150 // Get the new insert position for the node we care about. 1151 PointerType *NewIP = PointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1152 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1153 } 1154 PointerType *New = new (*this, TypeAlignment) PointerType(T, Canonical); 1155 Types.push_back(New); 1156 PointerTypes.InsertNode(New, InsertPos); 1157 return QualType(New, 0); 1158} 1159 1160/// getBlockPointerType - Return the uniqued reference to the type for 1161/// a pointer to the specified block. 1162QualType ASTContext::getBlockPointerType(QualType T) { 1163 assert(T->isFunctionType() && "block of function types only"); 1164 // Unique pointers, to guarantee there is only one block of a particular 1165 // structure. 1166 llvm::FoldingSetNodeID ID; 1167 BlockPointerType::Profile(ID, T); 1168 1169 void *InsertPos = 0; 1170 if (BlockPointerType *PT = 1171 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1172 return QualType(PT, 0); 1173 1174 // If the block pointee type isn't canonical, this won't be a canonical 1175 // type either so fill in the canonical type field. 1176 QualType Canonical; 1177 if (!T.isCanonical()) { 1178 Canonical = getBlockPointerType(getCanonicalType(T)); 1179 1180 // Get the new insert position for the node we care about. 1181 BlockPointerType *NewIP = 1182 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1183 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1184 } 1185 BlockPointerType *New 1186 = new (*this, TypeAlignment) BlockPointerType(T, Canonical); 1187 Types.push_back(New); 1188 BlockPointerTypes.InsertNode(New, InsertPos); 1189 return QualType(New, 0); 1190} 1191 1192/// getLValueReferenceType - Return the uniqued reference to the type for an 1193/// lvalue reference to the specified type. 1194QualType ASTContext::getLValueReferenceType(QualType T, bool SpelledAsLValue) { 1195 // Unique pointers, to guarantee there is only one pointer of a particular 1196 // structure. 1197 llvm::FoldingSetNodeID ID; 1198 ReferenceType::Profile(ID, T, SpelledAsLValue); 1199 1200 void *InsertPos = 0; 1201 if (LValueReferenceType *RT = 1202 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1203 return QualType(RT, 0); 1204 1205 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1206 1207 // If the referencee type isn't canonical, this won't be a canonical type 1208 // either, so fill in the canonical type field. 1209 QualType Canonical; 1210 if (!SpelledAsLValue || InnerRef || !T.isCanonical()) { 1211 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1212 Canonical = getLValueReferenceType(getCanonicalType(PointeeType)); 1213 1214 // Get the new insert position for the node we care about. 1215 LValueReferenceType *NewIP = 1216 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1217 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1218 } 1219 1220 LValueReferenceType *New 1221 = new (*this, TypeAlignment) LValueReferenceType(T, Canonical, 1222 SpelledAsLValue); 1223 Types.push_back(New); 1224 LValueReferenceTypes.InsertNode(New, InsertPos); 1225 1226 return QualType(New, 0); 1227} 1228 1229/// getRValueReferenceType - Return the uniqued reference to the type for an 1230/// rvalue reference to the specified type. 1231QualType ASTContext::getRValueReferenceType(QualType T) { 1232 // Unique pointers, to guarantee there is only one pointer of a particular 1233 // structure. 1234 llvm::FoldingSetNodeID ID; 1235 ReferenceType::Profile(ID, T, false); 1236 1237 void *InsertPos = 0; 1238 if (RValueReferenceType *RT = 1239 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1240 return QualType(RT, 0); 1241 1242 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1243 1244 // If the referencee type isn't canonical, this won't be a canonical type 1245 // either, so fill in the canonical type field. 1246 QualType Canonical; 1247 if (InnerRef || !T.isCanonical()) { 1248 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1249 Canonical = getRValueReferenceType(getCanonicalType(PointeeType)); 1250 1251 // Get the new insert position for the node we care about. 1252 RValueReferenceType *NewIP = 1253 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1254 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1255 } 1256 1257 RValueReferenceType *New 1258 = new (*this, TypeAlignment) RValueReferenceType(T, Canonical); 1259 Types.push_back(New); 1260 RValueReferenceTypes.InsertNode(New, InsertPos); 1261 return QualType(New, 0); 1262} 1263 1264/// getMemberPointerType - Return the uniqued reference to the type for a 1265/// member pointer to the specified type, in the specified class. 1266QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls) { 1267 // Unique pointers, to guarantee there is only one pointer of a particular 1268 // structure. 1269 llvm::FoldingSetNodeID ID; 1270 MemberPointerType::Profile(ID, T, Cls); 1271 1272 void *InsertPos = 0; 1273 if (MemberPointerType *PT = 1274 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1275 return QualType(PT, 0); 1276 1277 // If the pointee or class type isn't canonical, this won't be a canonical 1278 // type either, so fill in the canonical type field. 1279 QualType Canonical; 1280 if (!T.isCanonical() || !Cls->isCanonicalUnqualified()) { 1281 Canonical = getMemberPointerType(getCanonicalType(T),getCanonicalType(Cls)); 1282 1283 // Get the new insert position for the node we care about. 1284 MemberPointerType *NewIP = 1285 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1286 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1287 } 1288 MemberPointerType *New 1289 = new (*this, TypeAlignment) MemberPointerType(T, Cls, Canonical); 1290 Types.push_back(New); 1291 MemberPointerTypes.InsertNode(New, InsertPos); 1292 return QualType(New, 0); 1293} 1294 1295/// getConstantArrayType - Return the unique reference to the type for an 1296/// array of the specified element type. 1297QualType ASTContext::getConstantArrayType(QualType EltTy, 1298 const llvm::APInt &ArySizeIn, 1299 ArrayType::ArraySizeModifier ASM, 1300 unsigned EltTypeQuals) { 1301 assert((EltTy->isDependentType() || 1302 EltTy->isIncompleteType() || EltTy->isConstantSizeType()) && 1303 "Constant array of VLAs is illegal!"); 1304 1305 // Convert the array size into a canonical width matching the pointer size for 1306 // the target. 1307 llvm::APInt ArySize(ArySizeIn); 1308 ArySize.zextOrTrunc(Target.getPointerWidth(EltTy.getAddressSpace())); 1309 1310 llvm::FoldingSetNodeID ID; 1311 ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, EltTypeQuals); 1312 1313 void *InsertPos = 0; 1314 if (ConstantArrayType *ATP = 1315 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1316 return QualType(ATP, 0); 1317 1318 // If the element type isn't canonical, this won't be a canonical type either, 1319 // so fill in the canonical type field. 1320 QualType Canonical; 1321 if (!EltTy.isCanonical()) { 1322 Canonical = getConstantArrayType(getCanonicalType(EltTy), ArySize, 1323 ASM, EltTypeQuals); 1324 // Get the new insert position for the node we care about. 1325 ConstantArrayType *NewIP = 1326 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1327 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1328 } 1329 1330 ConstantArrayType *New = new(*this,TypeAlignment) 1331 ConstantArrayType(EltTy, Canonical, ArySize, ASM, EltTypeQuals); 1332 ConstantArrayTypes.InsertNode(New, InsertPos); 1333 Types.push_back(New); 1334 return QualType(New, 0); 1335} 1336 1337/// getVariableArrayType - Returns a non-unique reference to the type for a 1338/// variable array of the specified element type. 1339QualType ASTContext::getVariableArrayType(QualType EltTy, 1340 Expr *NumElts, 1341 ArrayType::ArraySizeModifier ASM, 1342 unsigned EltTypeQuals, 1343 SourceRange Brackets) { 1344 // Since we don't unique expressions, it isn't possible to unique VLA's 1345 // that have an expression provided for their size. 1346 1347 VariableArrayType *New = new(*this, TypeAlignment) 1348 VariableArrayType(EltTy, QualType(), NumElts, ASM, EltTypeQuals, Brackets); 1349 1350 VariableArrayTypes.push_back(New); 1351 Types.push_back(New); 1352 return QualType(New, 0); 1353} 1354 1355/// getDependentSizedArrayType - Returns a non-unique reference to 1356/// the type for a dependently-sized array of the specified element 1357/// type. 1358QualType ASTContext::getDependentSizedArrayType(QualType EltTy, 1359 Expr *NumElts, 1360 ArrayType::ArraySizeModifier ASM, 1361 unsigned EltTypeQuals, 1362 SourceRange Brackets) { 1363 assert((!NumElts || NumElts->isTypeDependent() || 1364 NumElts->isValueDependent()) && 1365 "Size must be type- or value-dependent!"); 1366 1367 void *InsertPos = 0; 1368 DependentSizedArrayType *Canon = 0; 1369 llvm::FoldingSetNodeID ID; 1370 1371 if (NumElts) { 1372 // Dependently-sized array types that do not have a specified 1373 // number of elements will have their sizes deduced from an 1374 // initializer. 1375 DependentSizedArrayType::Profile(ID, *this, getCanonicalType(EltTy), ASM, 1376 EltTypeQuals, NumElts); 1377 1378 Canon = DependentSizedArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1379 } 1380 1381 DependentSizedArrayType *New; 1382 if (Canon) { 1383 // We already have a canonical version of this array type; use it as 1384 // the canonical type for a newly-built type. 1385 New = new (*this, TypeAlignment) 1386 DependentSizedArrayType(*this, EltTy, QualType(Canon, 0), 1387 NumElts, ASM, EltTypeQuals, Brackets); 1388 } else { 1389 QualType CanonEltTy = getCanonicalType(EltTy); 1390 if (CanonEltTy == EltTy) { 1391 New = new (*this, TypeAlignment) 1392 DependentSizedArrayType(*this, EltTy, QualType(), 1393 NumElts, ASM, EltTypeQuals, Brackets); 1394 1395 if (NumElts) { 1396 DependentSizedArrayType *CanonCheck 1397 = DependentSizedArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1398 assert(!CanonCheck && "Dependent-sized canonical array type broken"); 1399 (void)CanonCheck; 1400 DependentSizedArrayTypes.InsertNode(New, InsertPos); 1401 } 1402 } else { 1403 QualType Canon = getDependentSizedArrayType(CanonEltTy, NumElts, 1404 ASM, EltTypeQuals, 1405 SourceRange()); 1406 New = new (*this, TypeAlignment) 1407 DependentSizedArrayType(*this, EltTy, Canon, 1408 NumElts, ASM, EltTypeQuals, Brackets); 1409 } 1410 } 1411 1412 Types.push_back(New); 1413 return QualType(New, 0); 1414} 1415 1416QualType ASTContext::getIncompleteArrayType(QualType EltTy, 1417 ArrayType::ArraySizeModifier ASM, 1418 unsigned EltTypeQuals) { 1419 llvm::FoldingSetNodeID ID; 1420 IncompleteArrayType::Profile(ID, EltTy, ASM, EltTypeQuals); 1421 1422 void *InsertPos = 0; 1423 if (IncompleteArrayType *ATP = 1424 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1425 return QualType(ATP, 0); 1426 1427 // If the element type isn't canonical, this won't be a canonical type 1428 // either, so fill in the canonical type field. 1429 QualType Canonical; 1430 1431 if (!EltTy.isCanonical()) { 1432 Canonical = getIncompleteArrayType(getCanonicalType(EltTy), 1433 ASM, EltTypeQuals); 1434 1435 // Get the new insert position for the node we care about. 1436 IncompleteArrayType *NewIP = 1437 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1438 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1439 } 1440 1441 IncompleteArrayType *New = new (*this, TypeAlignment) 1442 IncompleteArrayType(EltTy, Canonical, ASM, EltTypeQuals); 1443 1444 IncompleteArrayTypes.InsertNode(New, InsertPos); 1445 Types.push_back(New); 1446 return QualType(New, 0); 1447} 1448 1449/// getVectorType - Return the unique reference to a vector type of 1450/// the specified element type and size. VectorType must be a built-in type. 1451QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts, 1452 bool IsAltiVec, bool IsPixel) { 1453 BuiltinType *baseType; 1454 1455 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1456 assert(baseType != 0 && "getVectorType(): Expecting a built-in type"); 1457 1458 // Check if we've already instantiated a vector of this type. 1459 llvm::FoldingSetNodeID ID; 1460 VectorType::Profile(ID, vecType, NumElts, Type::Vector, 1461 IsAltiVec, IsPixel); 1462 void *InsertPos = 0; 1463 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1464 return QualType(VTP, 0); 1465 1466 // If the element type isn't canonical, this won't be a canonical type either, 1467 // so fill in the canonical type field. 1468 QualType Canonical; 1469 if (!vecType.isCanonical() || IsAltiVec || IsPixel) { 1470 Canonical = getVectorType(getCanonicalType(vecType), 1471 NumElts, false, false); 1472 1473 // Get the new insert position for the node we care about. 1474 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1475 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1476 } 1477 VectorType *New = new (*this, TypeAlignment) 1478 VectorType(vecType, NumElts, Canonical, IsAltiVec, IsPixel); 1479 VectorTypes.InsertNode(New, InsertPos); 1480 Types.push_back(New); 1481 return QualType(New, 0); 1482} 1483 1484/// getExtVectorType - Return the unique reference to an extended vector type of 1485/// the specified element type and size. VectorType must be a built-in type. 1486QualType ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) { 1487 BuiltinType *baseType; 1488 1489 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1490 assert(baseType != 0 && "getExtVectorType(): Expecting a built-in type"); 1491 1492 // Check if we've already instantiated a vector of this type. 1493 llvm::FoldingSetNodeID ID; 1494 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector, false, false); 1495 void *InsertPos = 0; 1496 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1497 return QualType(VTP, 0); 1498 1499 // If the element type isn't canonical, this won't be a canonical type either, 1500 // so fill in the canonical type field. 1501 QualType Canonical; 1502 if (!vecType.isCanonical()) { 1503 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts); 1504 1505 // Get the new insert position for the node we care about. 1506 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1507 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1508 } 1509 ExtVectorType *New = new (*this, TypeAlignment) 1510 ExtVectorType(vecType, NumElts, Canonical); 1511 VectorTypes.InsertNode(New, InsertPos); 1512 Types.push_back(New); 1513 return QualType(New, 0); 1514} 1515 1516QualType ASTContext::getDependentSizedExtVectorType(QualType vecType, 1517 Expr *SizeExpr, 1518 SourceLocation AttrLoc) { 1519 llvm::FoldingSetNodeID ID; 1520 DependentSizedExtVectorType::Profile(ID, *this, getCanonicalType(vecType), 1521 SizeExpr); 1522 1523 void *InsertPos = 0; 1524 DependentSizedExtVectorType *Canon 1525 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1526 DependentSizedExtVectorType *New; 1527 if (Canon) { 1528 // We already have a canonical version of this array type; use it as 1529 // the canonical type for a newly-built type. 1530 New = new (*this, TypeAlignment) 1531 DependentSizedExtVectorType(*this, vecType, QualType(Canon, 0), 1532 SizeExpr, AttrLoc); 1533 } else { 1534 QualType CanonVecTy = getCanonicalType(vecType); 1535 if (CanonVecTy == vecType) { 1536 New = new (*this, TypeAlignment) 1537 DependentSizedExtVectorType(*this, vecType, QualType(), SizeExpr, 1538 AttrLoc); 1539 1540 DependentSizedExtVectorType *CanonCheck 1541 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1542 assert(!CanonCheck && "Dependent-sized ext_vector canonical type broken"); 1543 (void)CanonCheck; 1544 DependentSizedExtVectorTypes.InsertNode(New, InsertPos); 1545 } else { 1546 QualType Canon = getDependentSizedExtVectorType(CanonVecTy, SizeExpr, 1547 SourceLocation()); 1548 New = new (*this, TypeAlignment) 1549 DependentSizedExtVectorType(*this, vecType, Canon, SizeExpr, AttrLoc); 1550 } 1551 } 1552 1553 Types.push_back(New); 1554 return QualType(New, 0); 1555} 1556 1557/// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 1558/// 1559QualType ASTContext::getFunctionNoProtoType(QualType ResultTy, 1560 const FunctionType::ExtInfo &Info) { 1561 const CallingConv CallConv = Info.getCC(); 1562 // Unique functions, to guarantee there is only one function of a particular 1563 // structure. 1564 llvm::FoldingSetNodeID ID; 1565 FunctionNoProtoType::Profile(ID, ResultTy, Info); 1566 1567 void *InsertPos = 0; 1568 if (FunctionNoProtoType *FT = 1569 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1570 return QualType(FT, 0); 1571 1572 QualType Canonical; 1573 if (!ResultTy.isCanonical() || 1574 getCanonicalCallConv(CallConv) != CallConv) { 1575 Canonical = 1576 getFunctionNoProtoType(getCanonicalType(ResultTy), 1577 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1578 1579 // Get the new insert position for the node we care about. 1580 FunctionNoProtoType *NewIP = 1581 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1582 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1583 } 1584 1585 FunctionNoProtoType *New = new (*this, TypeAlignment) 1586 FunctionNoProtoType(ResultTy, Canonical, Info); 1587 Types.push_back(New); 1588 FunctionNoProtoTypes.InsertNode(New, InsertPos); 1589 return QualType(New, 0); 1590} 1591 1592/// getFunctionType - Return a normal function type with a typed argument 1593/// list. isVariadic indicates whether the argument list includes '...'. 1594QualType ASTContext::getFunctionType(QualType ResultTy,const QualType *ArgArray, 1595 unsigned NumArgs, bool isVariadic, 1596 unsigned TypeQuals, bool hasExceptionSpec, 1597 bool hasAnyExceptionSpec, unsigned NumExs, 1598 const QualType *ExArray, 1599 const FunctionType::ExtInfo &Info) { 1600 const CallingConv CallConv= Info.getCC(); 1601 // Unique functions, to guarantee there is only one function of a particular 1602 // structure. 1603 llvm::FoldingSetNodeID ID; 1604 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, isVariadic, 1605 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1606 NumExs, ExArray, Info); 1607 1608 void *InsertPos = 0; 1609 if (FunctionProtoType *FTP = 1610 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1611 return QualType(FTP, 0); 1612 1613 // Determine whether the type being created is already canonical or not. 1614 bool isCanonical = !hasExceptionSpec && ResultTy.isCanonical(); 1615 for (unsigned i = 0; i != NumArgs && isCanonical; ++i) 1616 if (!ArgArray[i].isCanonicalAsParam()) 1617 isCanonical = false; 1618 1619 // If this type isn't canonical, get the canonical version of it. 1620 // The exception spec is not part of the canonical type. 1621 QualType Canonical; 1622 if (!isCanonical || getCanonicalCallConv(CallConv) != CallConv) { 1623 llvm::SmallVector<QualType, 16> CanonicalArgs; 1624 CanonicalArgs.reserve(NumArgs); 1625 for (unsigned i = 0; i != NumArgs; ++i) 1626 CanonicalArgs.push_back(getCanonicalParamType(ArgArray[i])); 1627 1628 Canonical = getFunctionType(getCanonicalType(ResultTy), 1629 CanonicalArgs.data(), NumArgs, 1630 isVariadic, TypeQuals, false, 1631 false, 0, 0, 1632 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1633 1634 // Get the new insert position for the node we care about. 1635 FunctionProtoType *NewIP = 1636 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1637 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1638 } 1639 1640 // FunctionProtoType objects are allocated with extra bytes after them 1641 // for two variable size arrays (for parameter and exception types) at the 1642 // end of them. 1643 FunctionProtoType *FTP = 1644 (FunctionProtoType*)Allocate(sizeof(FunctionProtoType) + 1645 NumArgs*sizeof(QualType) + 1646 NumExs*sizeof(QualType), TypeAlignment); 1647 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, isVariadic, 1648 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1649 ExArray, NumExs, Canonical, Info); 1650 Types.push_back(FTP); 1651 FunctionProtoTypes.InsertNode(FTP, InsertPos); 1652 return QualType(FTP, 0); 1653} 1654 1655#ifndef NDEBUG 1656static bool NeedsInjectedClassNameType(const RecordDecl *D) { 1657 if (!isa<CXXRecordDecl>(D)) return false; 1658 const CXXRecordDecl *RD = cast<CXXRecordDecl>(D); 1659 if (isa<ClassTemplatePartialSpecializationDecl>(RD)) 1660 return true; 1661 if (RD->getDescribedClassTemplate() && 1662 !isa<ClassTemplateSpecializationDecl>(RD)) 1663 return true; 1664 return false; 1665} 1666#endif 1667 1668/// getInjectedClassNameType - Return the unique reference to the 1669/// injected class name type for the specified templated declaration. 1670QualType ASTContext::getInjectedClassNameType(CXXRecordDecl *Decl, 1671 QualType TST) { 1672 assert(NeedsInjectedClassNameType(Decl)); 1673 if (Decl->TypeForDecl) { 1674 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1675 } else if (CXXRecordDecl *PrevDecl 1676 = cast_or_null<CXXRecordDecl>(Decl->getPreviousDeclaration())) { 1677 assert(PrevDecl->TypeForDecl && "previous declaration has no type"); 1678 Decl->TypeForDecl = PrevDecl->TypeForDecl; 1679 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1680 } else { 1681 Decl->TypeForDecl = 1682 new (*this, TypeAlignment) InjectedClassNameType(Decl, TST); 1683 Types.push_back(Decl->TypeForDecl); 1684 } 1685 return QualType(Decl->TypeForDecl, 0); 1686} 1687 1688/// getTypeDeclType - Return the unique reference to the type for the 1689/// specified type declaration. 1690QualType ASTContext::getTypeDeclTypeSlow(const TypeDecl *Decl) { 1691 assert(Decl && "Passed null for Decl param"); 1692 assert(!Decl->TypeForDecl && "TypeForDecl present in slow case"); 1693 1694 if (const TypedefDecl *Typedef = dyn_cast<TypedefDecl>(Decl)) 1695 return getTypedefType(Typedef); 1696 1697 if (const ObjCInterfaceDecl *ObjCInterface 1698 = dyn_cast<ObjCInterfaceDecl>(Decl)) 1699 return getObjCInterfaceType(ObjCInterface); 1700 1701 assert(!isa<TemplateTypeParmDecl>(Decl) && 1702 "Template type parameter types are always available."); 1703 1704 if (const RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) { 1705 assert(!Record->getPreviousDeclaration() && 1706 "struct/union has previous declaration"); 1707 assert(!NeedsInjectedClassNameType(Record)); 1708 Decl->TypeForDecl = new (*this, TypeAlignment) RecordType(Record); 1709 } else if (const EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) { 1710 assert(!Enum->getPreviousDeclaration() && 1711 "enum has previous declaration"); 1712 Decl->TypeForDecl = new (*this, TypeAlignment) EnumType(Enum); 1713 } else if (const UnresolvedUsingTypenameDecl *Using = 1714 dyn_cast<UnresolvedUsingTypenameDecl>(Decl)) { 1715 Decl->TypeForDecl = new (*this, TypeAlignment) UnresolvedUsingType(Using); 1716 } else 1717 llvm_unreachable("TypeDecl without a type?"); 1718 1719 Types.push_back(Decl->TypeForDecl); 1720 return QualType(Decl->TypeForDecl, 0); 1721} 1722 1723/// getTypedefType - Return the unique reference to the type for the 1724/// specified typename decl. 1725QualType ASTContext::getTypedefType(const TypedefDecl *Decl) { 1726 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1727 1728 QualType Canonical = getCanonicalType(Decl->getUnderlyingType()); 1729 Decl->TypeForDecl = new(*this, TypeAlignment) 1730 TypedefType(Type::Typedef, Decl, Canonical); 1731 Types.push_back(Decl->TypeForDecl); 1732 return QualType(Decl->TypeForDecl, 0); 1733} 1734 1735/// \brief Retrieve a substitution-result type. 1736QualType 1737ASTContext::getSubstTemplateTypeParmType(const TemplateTypeParmType *Parm, 1738 QualType Replacement) { 1739 assert(Replacement.isCanonical() 1740 && "replacement types must always be canonical"); 1741 1742 llvm::FoldingSetNodeID ID; 1743 SubstTemplateTypeParmType::Profile(ID, Parm, Replacement); 1744 void *InsertPos = 0; 1745 SubstTemplateTypeParmType *SubstParm 1746 = SubstTemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1747 1748 if (!SubstParm) { 1749 SubstParm = new (*this, TypeAlignment) 1750 SubstTemplateTypeParmType(Parm, Replacement); 1751 Types.push_back(SubstParm); 1752 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 1753 } 1754 1755 return QualType(SubstParm, 0); 1756} 1757 1758/// \brief Retrieve the template type parameter type for a template 1759/// parameter or parameter pack with the given depth, index, and (optionally) 1760/// name. 1761QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index, 1762 bool ParameterPack, 1763 IdentifierInfo *Name) { 1764 llvm::FoldingSetNodeID ID; 1765 TemplateTypeParmType::Profile(ID, Depth, Index, ParameterPack, Name); 1766 void *InsertPos = 0; 1767 TemplateTypeParmType *TypeParm 1768 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1769 1770 if (TypeParm) 1771 return QualType(TypeParm, 0); 1772 1773 if (Name) { 1774 QualType Canon = getTemplateTypeParmType(Depth, Index, ParameterPack); 1775 TypeParm = new (*this, TypeAlignment) 1776 TemplateTypeParmType(Depth, Index, ParameterPack, Name, Canon); 1777 1778 TemplateTypeParmType *TypeCheck 1779 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1780 assert(!TypeCheck && "Template type parameter canonical type broken"); 1781 (void)TypeCheck; 1782 } else 1783 TypeParm = new (*this, TypeAlignment) 1784 TemplateTypeParmType(Depth, Index, ParameterPack); 1785 1786 Types.push_back(TypeParm); 1787 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos); 1788 1789 return QualType(TypeParm, 0); 1790} 1791 1792TypeSourceInfo * 1793ASTContext::getTemplateSpecializationTypeInfo(TemplateName Name, 1794 SourceLocation NameLoc, 1795 const TemplateArgumentListInfo &Args, 1796 QualType CanonType) { 1797 QualType TST = getTemplateSpecializationType(Name, Args, CanonType); 1798 1799 TypeSourceInfo *DI = CreateTypeSourceInfo(TST); 1800 TemplateSpecializationTypeLoc TL 1801 = cast<TemplateSpecializationTypeLoc>(DI->getTypeLoc()); 1802 TL.setTemplateNameLoc(NameLoc); 1803 TL.setLAngleLoc(Args.getLAngleLoc()); 1804 TL.setRAngleLoc(Args.getRAngleLoc()); 1805 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 1806 TL.setArgLocInfo(i, Args[i].getLocInfo()); 1807 return DI; 1808} 1809 1810QualType 1811ASTContext::getTemplateSpecializationType(TemplateName Template, 1812 const TemplateArgumentListInfo &Args, 1813 QualType Canon, 1814 bool IsCurrentInstantiation) { 1815 unsigned NumArgs = Args.size(); 1816 1817 llvm::SmallVector<TemplateArgument, 4> ArgVec; 1818 ArgVec.reserve(NumArgs); 1819 for (unsigned i = 0; i != NumArgs; ++i) 1820 ArgVec.push_back(Args[i].getArgument()); 1821 1822 return getTemplateSpecializationType(Template, ArgVec.data(), NumArgs, 1823 Canon, IsCurrentInstantiation); 1824} 1825 1826QualType 1827ASTContext::getTemplateSpecializationType(TemplateName Template, 1828 const TemplateArgument *Args, 1829 unsigned NumArgs, 1830 QualType Canon, 1831 bool IsCurrentInstantiation) { 1832 if (!Canon.isNull()) 1833 Canon = getCanonicalType(Canon); 1834 else { 1835 assert(!IsCurrentInstantiation && 1836 "current-instantiation specializations should always " 1837 "have a canonical type"); 1838 1839 // Build the canonical template specialization type. 1840 TemplateName CanonTemplate = getCanonicalTemplateName(Template); 1841 llvm::SmallVector<TemplateArgument, 4> CanonArgs; 1842 CanonArgs.reserve(NumArgs); 1843 for (unsigned I = 0; I != NumArgs; ++I) 1844 CanonArgs.push_back(getCanonicalTemplateArgument(Args[I])); 1845 1846 // Determine whether this canonical template specialization type already 1847 // exists. 1848 llvm::FoldingSetNodeID ID; 1849 TemplateSpecializationType::Profile(ID, CanonTemplate, false, 1850 CanonArgs.data(), NumArgs, *this); 1851 1852 void *InsertPos = 0; 1853 TemplateSpecializationType *Spec 1854 = TemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 1855 1856 if (!Spec) { 1857 // Allocate a new canonical template specialization type. 1858 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 1859 sizeof(TemplateArgument) * NumArgs), 1860 TypeAlignment); 1861 Spec = new (Mem) TemplateSpecializationType(*this, CanonTemplate, false, 1862 CanonArgs.data(), NumArgs, 1863 Canon); 1864 Types.push_back(Spec); 1865 TemplateSpecializationTypes.InsertNode(Spec, InsertPos); 1866 } 1867 1868 if (Canon.isNull()) 1869 Canon = QualType(Spec, 0); 1870 assert(Canon->isDependentType() && 1871 "Non-dependent template-id type must have a canonical type"); 1872 } 1873 1874 // Allocate the (non-canonical) template specialization type, but don't 1875 // try to unique it: these types typically have location information that 1876 // we don't unique and don't want to lose. 1877 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 1878 sizeof(TemplateArgument) * NumArgs), 1879 TypeAlignment); 1880 TemplateSpecializationType *Spec 1881 = new (Mem) TemplateSpecializationType(*this, Template, 1882 IsCurrentInstantiation, 1883 Args, NumArgs, 1884 Canon); 1885 1886 Types.push_back(Spec); 1887 return QualType(Spec, 0); 1888} 1889 1890QualType 1891ASTContext::getQualifiedNameType(NestedNameSpecifier *NNS, 1892 QualType NamedType) { 1893 llvm::FoldingSetNodeID ID; 1894 QualifiedNameType::Profile(ID, NNS, NamedType); 1895 1896 void *InsertPos = 0; 1897 QualifiedNameType *T 1898 = QualifiedNameTypes.FindNodeOrInsertPos(ID, InsertPos); 1899 if (T) 1900 return QualType(T, 0); 1901 1902 QualType Canon = NamedType; 1903 if (!Canon.isCanonical()) { 1904 Canon = getCanonicalType(NamedType); 1905 QualifiedNameType *CheckT 1906 = QualifiedNameTypes.FindNodeOrInsertPos(ID, InsertPos); 1907 assert(!CheckT && "Qualified name canonical type broken"); 1908 (void)CheckT; 1909 } 1910 1911 T = new (*this) QualifiedNameType(NNS, NamedType, Canon); 1912 Types.push_back(T); 1913 QualifiedNameTypes.InsertNode(T, InsertPos); 1914 return QualType(T, 0); 1915} 1916 1917QualType ASTContext::getDependentNameType(ElaboratedTypeKeyword Keyword, 1918 NestedNameSpecifier *NNS, 1919 const IdentifierInfo *Name, 1920 QualType Canon) { 1921 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 1922 1923 if (Canon.isNull()) { 1924 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 1925 ElaboratedTypeKeyword CanonKeyword = Keyword; 1926 if (Keyword == ETK_None) 1927 CanonKeyword = ETK_Typename; 1928 1929 if (CanonNNS != NNS || CanonKeyword != Keyword) 1930 Canon = getDependentNameType(CanonKeyword, CanonNNS, Name); 1931 } 1932 1933 llvm::FoldingSetNodeID ID; 1934 DependentNameType::Profile(ID, Keyword, NNS, Name); 1935 1936 void *InsertPos = 0; 1937 DependentNameType *T 1938 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 1939 if (T) 1940 return QualType(T, 0); 1941 1942 T = new (*this) DependentNameType(Keyword, NNS, Name, Canon); 1943 Types.push_back(T); 1944 DependentNameTypes.InsertNode(T, InsertPos); 1945 return QualType(T, 0); 1946} 1947 1948QualType 1949ASTContext::getDependentNameType(ElaboratedTypeKeyword Keyword, 1950 NestedNameSpecifier *NNS, 1951 const TemplateSpecializationType *TemplateId, 1952 QualType Canon) { 1953 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 1954 1955 llvm::FoldingSetNodeID ID; 1956 DependentNameType::Profile(ID, Keyword, NNS, TemplateId); 1957 1958 void *InsertPos = 0; 1959 DependentNameType *T 1960 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 1961 if (T) 1962 return QualType(T, 0); 1963 1964 if (Canon.isNull()) { 1965 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 1966 QualType CanonType = getCanonicalType(QualType(TemplateId, 0)); 1967 ElaboratedTypeKeyword CanonKeyword = Keyword; 1968 if (Keyword == ETK_None) 1969 CanonKeyword = ETK_Typename; 1970 if (CanonNNS != NNS || CanonKeyword != Keyword || 1971 CanonType != QualType(TemplateId, 0)) { 1972 const TemplateSpecializationType *CanonTemplateId 1973 = CanonType->getAs<TemplateSpecializationType>(); 1974 assert(CanonTemplateId && 1975 "Canonical type must also be a template specialization type"); 1976 Canon = getDependentNameType(CanonKeyword, CanonNNS, CanonTemplateId); 1977 } 1978 1979 DependentNameType *CheckT 1980 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 1981 assert(!CheckT && "Typename canonical type is broken"); (void)CheckT; 1982 } 1983 1984 T = new (*this) DependentNameType(Keyword, NNS, TemplateId, Canon); 1985 Types.push_back(T); 1986 DependentNameTypes.InsertNode(T, InsertPos); 1987 return QualType(T, 0); 1988} 1989 1990QualType 1991ASTContext::getElaboratedType(QualType UnderlyingType, 1992 ElaboratedType::TagKind Tag) { 1993 llvm::FoldingSetNodeID ID; 1994 ElaboratedType::Profile(ID, UnderlyingType, Tag); 1995 1996 void *InsertPos = 0; 1997 ElaboratedType *T = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 1998 if (T) 1999 return QualType(T, 0); 2000 2001 QualType Canon = UnderlyingType; 2002 if (!Canon.isCanonical()) { 2003 Canon = getCanonicalType(Canon); 2004 ElaboratedType *CheckT = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2005 assert(!CheckT && "Elaborated canonical type is broken"); (void)CheckT; 2006 } 2007 2008 T = new (*this) ElaboratedType(UnderlyingType, Tag, Canon); 2009 Types.push_back(T); 2010 ElaboratedTypes.InsertNode(T, InsertPos); 2011 return QualType(T, 0); 2012} 2013 2014/// CmpProtocolNames - Comparison predicate for sorting protocols 2015/// alphabetically. 2016static bool CmpProtocolNames(const ObjCProtocolDecl *LHS, 2017 const ObjCProtocolDecl *RHS) { 2018 return LHS->getDeclName() < RHS->getDeclName(); 2019} 2020 2021static bool areSortedAndUniqued(ObjCProtocolDecl **Protocols, 2022 unsigned NumProtocols) { 2023 if (NumProtocols == 0) return true; 2024 2025 for (unsigned i = 1; i != NumProtocols; ++i) 2026 if (!CmpProtocolNames(Protocols[i-1], Protocols[i])) 2027 return false; 2028 return true; 2029} 2030 2031static void SortAndUniqueProtocols(ObjCProtocolDecl **Protocols, 2032 unsigned &NumProtocols) { 2033 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols; 2034 2035 // Sort protocols, keyed by name. 2036 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames); 2037 2038 // Remove duplicates. 2039 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd); 2040 NumProtocols = ProtocolsEnd-Protocols; 2041} 2042 2043/// getObjCObjectPointerType - Return a ObjCObjectPointerType type for 2044/// the given interface decl and the conforming protocol list. 2045QualType ASTContext::getObjCObjectPointerType(QualType InterfaceT, 2046 ObjCProtocolDecl **Protocols, 2047 unsigned NumProtocols, 2048 unsigned Quals) { 2049 llvm::FoldingSetNodeID ID; 2050 ObjCObjectPointerType::Profile(ID, InterfaceT, Protocols, NumProtocols); 2051 Qualifiers Qs = Qualifiers::fromCVRMask(Quals); 2052 2053 void *InsertPos = 0; 2054 if (ObjCObjectPointerType *QT = 2055 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 2056 return getQualifiedType(QualType(QT, 0), Qs); 2057 2058 // Sort the protocol list alphabetically to canonicalize it. 2059 QualType Canonical; 2060 if (!InterfaceT.isCanonical() || 2061 !areSortedAndUniqued(Protocols, NumProtocols)) { 2062 if (!areSortedAndUniqued(Protocols, NumProtocols)) { 2063 llvm::SmallVector<ObjCProtocolDecl*, 8> Sorted(Protocols, 2064 Protocols + NumProtocols); 2065 unsigned UniqueCount = NumProtocols; 2066 2067 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2068 2069 Canonical = getObjCObjectPointerType(getCanonicalType(InterfaceT), 2070 &Sorted[0], UniqueCount); 2071 } else { 2072 Canonical = getObjCObjectPointerType(getCanonicalType(InterfaceT), 2073 Protocols, NumProtocols); 2074 } 2075 2076 // Regenerate InsertPos. 2077 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 2078 } 2079 2080 // No match. 2081 unsigned Size = sizeof(ObjCObjectPointerType) 2082 + NumProtocols * sizeof(ObjCProtocolDecl *); 2083 void *Mem = Allocate(Size, TypeAlignment); 2084 ObjCObjectPointerType *QType = new (Mem) ObjCObjectPointerType(Canonical, 2085 InterfaceT, 2086 Protocols, 2087 NumProtocols); 2088 2089 Types.push_back(QType); 2090 ObjCObjectPointerTypes.InsertNode(QType, InsertPos); 2091 return getQualifiedType(QualType(QType, 0), Qs); 2092} 2093 2094/// getObjCInterfaceType - Return the unique reference to the type for the 2095/// specified ObjC interface decl. The list of protocols is optional. 2096QualType ASTContext::getObjCInterfaceType(const ObjCInterfaceDecl *Decl, 2097 ObjCProtocolDecl **Protocols, unsigned NumProtocols) { 2098 llvm::FoldingSetNodeID ID; 2099 ObjCInterfaceType::Profile(ID, Decl, Protocols, NumProtocols); 2100 2101 void *InsertPos = 0; 2102 if (ObjCInterfaceType *QT = 2103 ObjCInterfaceTypes.FindNodeOrInsertPos(ID, InsertPos)) 2104 return QualType(QT, 0); 2105 2106 // Sort the protocol list alphabetically to canonicalize it. 2107 QualType Canonical; 2108 if (NumProtocols && !areSortedAndUniqued(Protocols, NumProtocols)) { 2109 llvm::SmallVector<ObjCProtocolDecl*, 8> Sorted(Protocols, 2110 Protocols + NumProtocols); 2111 2112 unsigned UniqueCount = NumProtocols; 2113 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2114 2115 Canonical = getObjCInterfaceType(Decl, &Sorted[0], UniqueCount); 2116 2117 ObjCInterfaceTypes.FindNodeOrInsertPos(ID, InsertPos); 2118 } 2119 2120 unsigned Size = sizeof(ObjCInterfaceType) 2121 + NumProtocols * sizeof(ObjCProtocolDecl *); 2122 void *Mem = Allocate(Size, TypeAlignment); 2123 ObjCInterfaceType *QType = new (Mem) ObjCInterfaceType(Canonical, 2124 const_cast<ObjCInterfaceDecl*>(Decl), 2125 Protocols, 2126 NumProtocols); 2127 2128 Types.push_back(QType); 2129 ObjCInterfaceTypes.InsertNode(QType, InsertPos); 2130 return QualType(QType, 0); 2131} 2132 2133/// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique 2134/// TypeOfExprType AST's (since expression's are never shared). For example, 2135/// multiple declarations that refer to "typeof(x)" all contain different 2136/// DeclRefExpr's. This doesn't effect the type checker, since it operates 2137/// on canonical type's (which are always unique). 2138QualType ASTContext::getTypeOfExprType(Expr *tofExpr) { 2139 TypeOfExprType *toe; 2140 if (tofExpr->isTypeDependent()) { 2141 llvm::FoldingSetNodeID ID; 2142 DependentTypeOfExprType::Profile(ID, *this, tofExpr); 2143 2144 void *InsertPos = 0; 2145 DependentTypeOfExprType *Canon 2146 = DependentTypeOfExprTypes.FindNodeOrInsertPos(ID, InsertPos); 2147 if (Canon) { 2148 // We already have a "canonical" version of an identical, dependent 2149 // typeof(expr) type. Use that as our canonical type. 2150 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, 2151 QualType((TypeOfExprType*)Canon, 0)); 2152 } 2153 else { 2154 // Build a new, canonical typeof(expr) type. 2155 Canon 2156 = new (*this, TypeAlignment) DependentTypeOfExprType(*this, tofExpr); 2157 DependentTypeOfExprTypes.InsertNode(Canon, InsertPos); 2158 toe = Canon; 2159 } 2160 } else { 2161 QualType Canonical = getCanonicalType(tofExpr->getType()); 2162 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, Canonical); 2163 } 2164 Types.push_back(toe); 2165 return QualType(toe, 0); 2166} 2167 2168/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique 2169/// TypeOfType AST's. The only motivation to unique these nodes would be 2170/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be 2171/// an issue. This doesn't effect the type checker, since it operates 2172/// on canonical type's (which are always unique). 2173QualType ASTContext::getTypeOfType(QualType tofType) { 2174 QualType Canonical = getCanonicalType(tofType); 2175 TypeOfType *tot = new (*this, TypeAlignment) TypeOfType(tofType, Canonical); 2176 Types.push_back(tot); 2177 return QualType(tot, 0); 2178} 2179 2180/// getDecltypeForExpr - Given an expr, will return the decltype for that 2181/// expression, according to the rules in C++0x [dcl.type.simple]p4 2182static QualType getDecltypeForExpr(const Expr *e, ASTContext &Context) { 2183 if (e->isTypeDependent()) 2184 return Context.DependentTy; 2185 2186 // If e is an id expression or a class member access, decltype(e) is defined 2187 // as the type of the entity named by e. 2188 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(e)) { 2189 if (const ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl())) 2190 return VD->getType(); 2191 } 2192 if (const MemberExpr *ME = dyn_cast<MemberExpr>(e)) { 2193 if (const FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) 2194 return FD->getType(); 2195 } 2196 // If e is a function call or an invocation of an overloaded operator, 2197 // (parentheses around e are ignored), decltype(e) is defined as the 2198 // return type of that function. 2199 if (const CallExpr *CE = dyn_cast<CallExpr>(e->IgnoreParens())) 2200 return CE->getCallReturnType(); 2201 2202 QualType T = e->getType(); 2203 2204 // Otherwise, where T is the type of e, if e is an lvalue, decltype(e) is 2205 // defined as T&, otherwise decltype(e) is defined as T. 2206 if (e->isLvalue(Context) == Expr::LV_Valid) 2207 T = Context.getLValueReferenceType(T); 2208 2209 return T; 2210} 2211 2212/// getDecltypeType - Unlike many "get<Type>" functions, we don't unique 2213/// DecltypeType AST's. The only motivation to unique these nodes would be 2214/// memory savings. Since decltype(t) is fairly uncommon, space shouldn't be 2215/// an issue. This doesn't effect the type checker, since it operates 2216/// on canonical type's (which are always unique). 2217QualType ASTContext::getDecltypeType(Expr *e) { 2218 DecltypeType *dt; 2219 if (e->isTypeDependent()) { 2220 llvm::FoldingSetNodeID ID; 2221 DependentDecltypeType::Profile(ID, *this, e); 2222 2223 void *InsertPos = 0; 2224 DependentDecltypeType *Canon 2225 = DependentDecltypeTypes.FindNodeOrInsertPos(ID, InsertPos); 2226 if (Canon) { 2227 // We already have a "canonical" version of an equivalent, dependent 2228 // decltype type. Use that as our canonical type. 2229 dt = new (*this, TypeAlignment) DecltypeType(e, DependentTy, 2230 QualType((DecltypeType*)Canon, 0)); 2231 } 2232 else { 2233 // Build a new, canonical typeof(expr) type. 2234 Canon = new (*this, TypeAlignment) DependentDecltypeType(*this, e); 2235 DependentDecltypeTypes.InsertNode(Canon, InsertPos); 2236 dt = Canon; 2237 } 2238 } else { 2239 QualType T = getDecltypeForExpr(e, *this); 2240 dt = new (*this, TypeAlignment) DecltypeType(e, T, getCanonicalType(T)); 2241 } 2242 Types.push_back(dt); 2243 return QualType(dt, 0); 2244} 2245 2246/// getTagDeclType - Return the unique reference to the type for the 2247/// specified TagDecl (struct/union/class/enum) decl. 2248QualType ASTContext::getTagDeclType(const TagDecl *Decl) { 2249 assert (Decl); 2250 // FIXME: What is the design on getTagDeclType when it requires casting 2251 // away const? mutable? 2252 return getTypeDeclType(const_cast<TagDecl*>(Decl)); 2253} 2254 2255/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result 2256/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and 2257/// needs to agree with the definition in <stddef.h>. 2258CanQualType ASTContext::getSizeType() const { 2259 return getFromTargetType(Target.getSizeType()); 2260} 2261 2262/// getSignedWCharType - Return the type of "signed wchar_t". 2263/// Used when in C++, as a GCC extension. 2264QualType ASTContext::getSignedWCharType() const { 2265 // FIXME: derive from "Target" ? 2266 return WCharTy; 2267} 2268 2269/// getUnsignedWCharType - Return the type of "unsigned wchar_t". 2270/// Used when in C++, as a GCC extension. 2271QualType ASTContext::getUnsignedWCharType() const { 2272 // FIXME: derive from "Target" ? 2273 return UnsignedIntTy; 2274} 2275 2276/// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 2277/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 2278QualType ASTContext::getPointerDiffType() const { 2279 return getFromTargetType(Target.getPtrDiffType(0)); 2280} 2281 2282//===----------------------------------------------------------------------===// 2283// Type Operators 2284//===----------------------------------------------------------------------===// 2285 2286CanQualType ASTContext::getCanonicalParamType(QualType T) { 2287 // Push qualifiers into arrays, and then discard any remaining 2288 // qualifiers. 2289 T = getCanonicalType(T); 2290 const Type *Ty = T.getTypePtr(); 2291 2292 QualType Result; 2293 if (isa<ArrayType>(Ty)) { 2294 Result = getArrayDecayedType(QualType(Ty,0)); 2295 } else if (isa<FunctionType>(Ty)) { 2296 Result = getPointerType(QualType(Ty, 0)); 2297 } else { 2298 Result = QualType(Ty, 0); 2299 } 2300 2301 return CanQualType::CreateUnsafe(Result); 2302} 2303 2304/// getCanonicalType - Return the canonical (structural) type corresponding to 2305/// the specified potentially non-canonical type. The non-canonical version 2306/// of a type may have many "decorated" versions of types. Decorators can 2307/// include typedefs, 'typeof' operators, etc. The returned type is guaranteed 2308/// to be free of any of these, allowing two canonical types to be compared 2309/// for exact equality with a simple pointer comparison. 2310CanQualType ASTContext::getCanonicalType(QualType T) { 2311 QualifierCollector Quals; 2312 const Type *Ptr = Quals.strip(T); 2313 QualType CanType = Ptr->getCanonicalTypeInternal(); 2314 2315 // The canonical internal type will be the canonical type *except* 2316 // that we push type qualifiers down through array types. 2317 2318 // If there are no new qualifiers to push down, stop here. 2319 if (!Quals.hasQualifiers()) 2320 return CanQualType::CreateUnsafe(CanType); 2321 2322 // If the type qualifiers are on an array type, get the canonical 2323 // type of the array with the qualifiers applied to the element 2324 // type. 2325 ArrayType *AT = dyn_cast<ArrayType>(CanType); 2326 if (!AT) 2327 return CanQualType::CreateUnsafe(getQualifiedType(CanType, Quals)); 2328 2329 // Get the canonical version of the element with the extra qualifiers on it. 2330 // This can recursively sink qualifiers through multiple levels of arrays. 2331 QualType NewEltTy = getQualifiedType(AT->getElementType(), Quals); 2332 NewEltTy = getCanonicalType(NewEltTy); 2333 2334 if (ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 2335 return CanQualType::CreateUnsafe( 2336 getConstantArrayType(NewEltTy, CAT->getSize(), 2337 CAT->getSizeModifier(), 2338 CAT->getIndexTypeCVRQualifiers())); 2339 if (IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) 2340 return CanQualType::CreateUnsafe( 2341 getIncompleteArrayType(NewEltTy, IAT->getSizeModifier(), 2342 IAT->getIndexTypeCVRQualifiers())); 2343 2344 if (DependentSizedArrayType *DSAT = dyn_cast<DependentSizedArrayType>(AT)) 2345 return CanQualType::CreateUnsafe( 2346 getDependentSizedArrayType(NewEltTy, 2347 DSAT->getSizeExpr() ? 2348 DSAT->getSizeExpr()->Retain() : 0, 2349 DSAT->getSizeModifier(), 2350 DSAT->getIndexTypeCVRQualifiers(), 2351 DSAT->getBracketsRange())->getCanonicalTypeInternal()); 2352 2353 VariableArrayType *VAT = cast<VariableArrayType>(AT); 2354 return CanQualType::CreateUnsafe(getVariableArrayType(NewEltTy, 2355 VAT->getSizeExpr() ? 2356 VAT->getSizeExpr()->Retain() : 0, 2357 VAT->getSizeModifier(), 2358 VAT->getIndexTypeCVRQualifiers(), 2359 VAT->getBracketsRange())); 2360} 2361 2362QualType ASTContext::getUnqualifiedArrayType(QualType T, 2363 Qualifiers &Quals) { 2364 Quals = T.getQualifiers(); 2365 if (!isa<ArrayType>(T)) { 2366 return T.getUnqualifiedType(); 2367 } 2368 2369 const ArrayType *AT = cast<ArrayType>(T); 2370 QualType Elt = AT->getElementType(); 2371 QualType UnqualElt = getUnqualifiedArrayType(Elt, Quals); 2372 if (Elt == UnqualElt) 2373 return T; 2374 2375 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(T)) { 2376 return getConstantArrayType(UnqualElt, CAT->getSize(), 2377 CAT->getSizeModifier(), 0); 2378 } 2379 2380 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(T)) { 2381 return getIncompleteArrayType(UnqualElt, IAT->getSizeModifier(), 0); 2382 } 2383 2384 const DependentSizedArrayType *DSAT = cast<DependentSizedArrayType>(T); 2385 return getDependentSizedArrayType(UnqualElt, DSAT->getSizeExpr()->Retain(), 2386 DSAT->getSizeModifier(), 0, 2387 SourceRange()); 2388} 2389 2390DeclarationName ASTContext::getNameForTemplate(TemplateName Name) { 2391 if (TemplateDecl *TD = Name.getAsTemplateDecl()) 2392 return TD->getDeclName(); 2393 2394 if (DependentTemplateName *DTN = Name.getAsDependentTemplateName()) { 2395 if (DTN->isIdentifier()) { 2396 return DeclarationNames.getIdentifier(DTN->getIdentifier()); 2397 } else { 2398 return DeclarationNames.getCXXOperatorName(DTN->getOperator()); 2399 } 2400 } 2401 2402 OverloadedTemplateStorage *Storage = Name.getAsOverloadedTemplate(); 2403 assert(Storage); 2404 return (*Storage->begin())->getDeclName(); 2405} 2406 2407TemplateName ASTContext::getCanonicalTemplateName(TemplateName Name) { 2408 // If this template name refers to a template, the canonical 2409 // template name merely stores the template itself. 2410 if (TemplateDecl *Template = Name.getAsTemplateDecl()) 2411 return TemplateName(cast<TemplateDecl>(Template->getCanonicalDecl())); 2412 2413 assert(!Name.getAsOverloadedTemplate()); 2414 2415 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 2416 assert(DTN && "Non-dependent template names must refer to template decls."); 2417 return DTN->CanonicalTemplateName; 2418} 2419 2420bool ASTContext::hasSameTemplateName(TemplateName X, TemplateName Y) { 2421 X = getCanonicalTemplateName(X); 2422 Y = getCanonicalTemplateName(Y); 2423 return X.getAsVoidPointer() == Y.getAsVoidPointer(); 2424} 2425 2426TemplateArgument 2427ASTContext::getCanonicalTemplateArgument(const TemplateArgument &Arg) { 2428 switch (Arg.getKind()) { 2429 case TemplateArgument::Null: 2430 return Arg; 2431 2432 case TemplateArgument::Expression: 2433 return Arg; 2434 2435 case TemplateArgument::Declaration: 2436 return TemplateArgument(Arg.getAsDecl()->getCanonicalDecl()); 2437 2438 case TemplateArgument::Template: 2439 return TemplateArgument(getCanonicalTemplateName(Arg.getAsTemplate())); 2440 2441 case TemplateArgument::Integral: 2442 return TemplateArgument(*Arg.getAsIntegral(), 2443 getCanonicalType(Arg.getIntegralType())); 2444 2445 case TemplateArgument::Type: 2446 return TemplateArgument(getCanonicalType(Arg.getAsType())); 2447 2448 case TemplateArgument::Pack: { 2449 // FIXME: Allocate in ASTContext 2450 TemplateArgument *CanonArgs = new TemplateArgument[Arg.pack_size()]; 2451 unsigned Idx = 0; 2452 for (TemplateArgument::pack_iterator A = Arg.pack_begin(), 2453 AEnd = Arg.pack_end(); 2454 A != AEnd; (void)++A, ++Idx) 2455 CanonArgs[Idx] = getCanonicalTemplateArgument(*A); 2456 2457 TemplateArgument Result; 2458 Result.setArgumentPack(CanonArgs, Arg.pack_size(), false); 2459 return Result; 2460 } 2461 } 2462 2463 // Silence GCC warning 2464 assert(false && "Unhandled template argument kind"); 2465 return TemplateArgument(); 2466} 2467 2468NestedNameSpecifier * 2469ASTContext::getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) { 2470 if (!NNS) 2471 return 0; 2472 2473 switch (NNS->getKind()) { 2474 case NestedNameSpecifier::Identifier: 2475 // Canonicalize the prefix but keep the identifier the same. 2476 return NestedNameSpecifier::Create(*this, 2477 getCanonicalNestedNameSpecifier(NNS->getPrefix()), 2478 NNS->getAsIdentifier()); 2479 2480 case NestedNameSpecifier::Namespace: 2481 // A namespace is canonical; build a nested-name-specifier with 2482 // this namespace and no prefix. 2483 return NestedNameSpecifier::Create(*this, 0, NNS->getAsNamespace()); 2484 2485 case NestedNameSpecifier::TypeSpec: 2486 case NestedNameSpecifier::TypeSpecWithTemplate: { 2487 QualType T = getCanonicalType(QualType(NNS->getAsType(), 0)); 2488 return NestedNameSpecifier::Create(*this, 0, 2489 NNS->getKind() == NestedNameSpecifier::TypeSpecWithTemplate, 2490 T.getTypePtr()); 2491 } 2492 2493 case NestedNameSpecifier::Global: 2494 // The global specifier is canonical and unique. 2495 return NNS; 2496 } 2497 2498 // Required to silence a GCC warning 2499 return 0; 2500} 2501 2502 2503const ArrayType *ASTContext::getAsArrayType(QualType T) { 2504 // Handle the non-qualified case efficiently. 2505 if (!T.hasLocalQualifiers()) { 2506 // Handle the common positive case fast. 2507 if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 2508 return AT; 2509 } 2510 2511 // Handle the common negative case fast. 2512 QualType CType = T->getCanonicalTypeInternal(); 2513 if (!isa<ArrayType>(CType)) 2514 return 0; 2515 2516 // Apply any qualifiers from the array type to the element type. This 2517 // implements C99 6.7.3p8: "If the specification of an array type includes 2518 // any type qualifiers, the element type is so qualified, not the array type." 2519 2520 // If we get here, we either have type qualifiers on the type, or we have 2521 // sugar such as a typedef in the way. If we have type qualifiers on the type 2522 // we must propagate them down into the element type. 2523 2524 QualifierCollector Qs; 2525 const Type *Ty = Qs.strip(T.getDesugaredType()); 2526 2527 // If we have a simple case, just return now. 2528 const ArrayType *ATy = dyn_cast<ArrayType>(Ty); 2529 if (ATy == 0 || Qs.empty()) 2530 return ATy; 2531 2532 // Otherwise, we have an array and we have qualifiers on it. Push the 2533 // qualifiers into the array element type and return a new array type. 2534 // Get the canonical version of the element with the extra qualifiers on it. 2535 // This can recursively sink qualifiers through multiple levels of arrays. 2536 QualType NewEltTy = getQualifiedType(ATy->getElementType(), Qs); 2537 2538 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy)) 2539 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(), 2540 CAT->getSizeModifier(), 2541 CAT->getIndexTypeCVRQualifiers())); 2542 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy)) 2543 return cast<ArrayType>(getIncompleteArrayType(NewEltTy, 2544 IAT->getSizeModifier(), 2545 IAT->getIndexTypeCVRQualifiers())); 2546 2547 if (const DependentSizedArrayType *DSAT 2548 = dyn_cast<DependentSizedArrayType>(ATy)) 2549 return cast<ArrayType>( 2550 getDependentSizedArrayType(NewEltTy, 2551 DSAT->getSizeExpr() ? 2552 DSAT->getSizeExpr()->Retain() : 0, 2553 DSAT->getSizeModifier(), 2554 DSAT->getIndexTypeCVRQualifiers(), 2555 DSAT->getBracketsRange())); 2556 2557 const VariableArrayType *VAT = cast<VariableArrayType>(ATy); 2558 return cast<ArrayType>(getVariableArrayType(NewEltTy, 2559 VAT->getSizeExpr() ? 2560 VAT->getSizeExpr()->Retain() : 0, 2561 VAT->getSizeModifier(), 2562 VAT->getIndexTypeCVRQualifiers(), 2563 VAT->getBracketsRange())); 2564} 2565 2566 2567/// getArrayDecayedType - Return the properly qualified result of decaying the 2568/// specified array type to a pointer. This operation is non-trivial when 2569/// handling typedefs etc. The canonical type of "T" must be an array type, 2570/// this returns a pointer to a properly qualified element of the array. 2571/// 2572/// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 2573QualType ASTContext::getArrayDecayedType(QualType Ty) { 2574 // Get the element type with 'getAsArrayType' so that we don't lose any 2575 // typedefs in the element type of the array. This also handles propagation 2576 // of type qualifiers from the array type into the element type if present 2577 // (C99 6.7.3p8). 2578 const ArrayType *PrettyArrayType = getAsArrayType(Ty); 2579 assert(PrettyArrayType && "Not an array type!"); 2580 2581 QualType PtrTy = getPointerType(PrettyArrayType->getElementType()); 2582 2583 // int x[restrict 4] -> int *restrict 2584 return getQualifiedType(PtrTy, PrettyArrayType->getIndexTypeQualifiers()); 2585} 2586 2587QualType ASTContext::getBaseElementType(QualType QT) { 2588 QualifierCollector Qs; 2589 while (const ArrayType *AT = getAsArrayType(QualType(Qs.strip(QT), 0))) 2590 QT = AT->getElementType(); 2591 return Qs.apply(QT); 2592} 2593 2594QualType ASTContext::getBaseElementType(const ArrayType *AT) { 2595 QualType ElemTy = AT->getElementType(); 2596 2597 if (const ArrayType *AT = getAsArrayType(ElemTy)) 2598 return getBaseElementType(AT); 2599 2600 return ElemTy; 2601} 2602 2603/// getConstantArrayElementCount - Returns number of constant array elements. 2604uint64_t 2605ASTContext::getConstantArrayElementCount(const ConstantArrayType *CA) const { 2606 uint64_t ElementCount = 1; 2607 do { 2608 ElementCount *= CA->getSize().getZExtValue(); 2609 CA = dyn_cast<ConstantArrayType>(CA->getElementType()); 2610 } while (CA); 2611 return ElementCount; 2612} 2613 2614/// getFloatingRank - Return a relative rank for floating point types. 2615/// This routine will assert if passed a built-in type that isn't a float. 2616static FloatingRank getFloatingRank(QualType T) { 2617 if (const ComplexType *CT = T->getAs<ComplexType>()) 2618 return getFloatingRank(CT->getElementType()); 2619 2620 assert(T->getAs<BuiltinType>() && "getFloatingRank(): not a floating type"); 2621 switch (T->getAs<BuiltinType>()->getKind()) { 2622 default: assert(0 && "getFloatingRank(): not a floating type"); 2623 case BuiltinType::Float: return FloatRank; 2624 case BuiltinType::Double: return DoubleRank; 2625 case BuiltinType::LongDouble: return LongDoubleRank; 2626 } 2627} 2628 2629/// getFloatingTypeOfSizeWithinDomain - Returns a real floating 2630/// point or a complex type (based on typeDomain/typeSize). 2631/// 'typeDomain' is a real floating point or complex type. 2632/// 'typeSize' is a real floating point or complex type. 2633QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size, 2634 QualType Domain) const { 2635 FloatingRank EltRank = getFloatingRank(Size); 2636 if (Domain->isComplexType()) { 2637 switch (EltRank) { 2638 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2639 case FloatRank: return FloatComplexTy; 2640 case DoubleRank: return DoubleComplexTy; 2641 case LongDoubleRank: return LongDoubleComplexTy; 2642 } 2643 } 2644 2645 assert(Domain->isRealFloatingType() && "Unknown domain!"); 2646 switch (EltRank) { 2647 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2648 case FloatRank: return FloatTy; 2649 case DoubleRank: return DoubleTy; 2650 case LongDoubleRank: return LongDoubleTy; 2651 } 2652} 2653 2654/// getFloatingTypeOrder - Compare the rank of the two specified floating 2655/// point types, ignoring the domain of the type (i.e. 'double' == 2656/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 2657/// LHS < RHS, return -1. 2658int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) { 2659 FloatingRank LHSR = getFloatingRank(LHS); 2660 FloatingRank RHSR = getFloatingRank(RHS); 2661 2662 if (LHSR == RHSR) 2663 return 0; 2664 if (LHSR > RHSR) 2665 return 1; 2666 return -1; 2667} 2668 2669/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This 2670/// routine will assert if passed a built-in type that isn't an integer or enum, 2671/// or if it is not canonicalized. 2672unsigned ASTContext::getIntegerRank(Type *T) { 2673 assert(T->isCanonicalUnqualified() && "T should be canonicalized"); 2674 if (EnumType* ET = dyn_cast<EnumType>(T)) 2675 T = ET->getDecl()->getPromotionType().getTypePtr(); 2676 2677 if (T->isSpecificBuiltinType(BuiltinType::WChar)) 2678 T = getFromTargetType(Target.getWCharType()).getTypePtr(); 2679 2680 if (T->isSpecificBuiltinType(BuiltinType::Char16)) 2681 T = getFromTargetType(Target.getChar16Type()).getTypePtr(); 2682 2683 if (T->isSpecificBuiltinType(BuiltinType::Char32)) 2684 T = getFromTargetType(Target.getChar32Type()).getTypePtr(); 2685 2686 switch (cast<BuiltinType>(T)->getKind()) { 2687 default: assert(0 && "getIntegerRank(): not a built-in integer"); 2688 case BuiltinType::Bool: 2689 return 1 + (getIntWidth(BoolTy) << 3); 2690 case BuiltinType::Char_S: 2691 case BuiltinType::Char_U: 2692 case BuiltinType::SChar: 2693 case BuiltinType::UChar: 2694 return 2 + (getIntWidth(CharTy) << 3); 2695 case BuiltinType::Short: 2696 case BuiltinType::UShort: 2697 return 3 + (getIntWidth(ShortTy) << 3); 2698 case BuiltinType::Int: 2699 case BuiltinType::UInt: 2700 return 4 + (getIntWidth(IntTy) << 3); 2701 case BuiltinType::Long: 2702 case BuiltinType::ULong: 2703 return 5 + (getIntWidth(LongTy) << 3); 2704 case BuiltinType::LongLong: 2705 case BuiltinType::ULongLong: 2706 return 6 + (getIntWidth(LongLongTy) << 3); 2707 case BuiltinType::Int128: 2708 case BuiltinType::UInt128: 2709 return 7 + (getIntWidth(Int128Ty) << 3); 2710 } 2711} 2712 2713/// \brief Whether this is a promotable bitfield reference according 2714/// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 2715/// 2716/// \returns the type this bit-field will promote to, or NULL if no 2717/// promotion occurs. 2718QualType ASTContext::isPromotableBitField(Expr *E) { 2719 FieldDecl *Field = E->getBitField(); 2720 if (!Field) 2721 return QualType(); 2722 2723 QualType FT = Field->getType(); 2724 2725 llvm::APSInt BitWidthAP = Field->getBitWidth()->EvaluateAsInt(*this); 2726 uint64_t BitWidth = BitWidthAP.getZExtValue(); 2727 uint64_t IntSize = getTypeSize(IntTy); 2728 // GCC extension compatibility: if the bit-field size is less than or equal 2729 // to the size of int, it gets promoted no matter what its type is. 2730 // For instance, unsigned long bf : 4 gets promoted to signed int. 2731 if (BitWidth < IntSize) 2732 return IntTy; 2733 2734 if (BitWidth == IntSize) 2735 return FT->isSignedIntegerType() ? IntTy : UnsignedIntTy; 2736 2737 // Types bigger than int are not subject to promotions, and therefore act 2738 // like the base type. 2739 // FIXME: This doesn't quite match what gcc does, but what gcc does here 2740 // is ridiculous. 2741 return QualType(); 2742} 2743 2744/// getPromotedIntegerType - Returns the type that Promotable will 2745/// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 2746/// integer type. 2747QualType ASTContext::getPromotedIntegerType(QualType Promotable) { 2748 assert(!Promotable.isNull()); 2749 assert(Promotable->isPromotableIntegerType()); 2750 if (const EnumType *ET = Promotable->getAs<EnumType>()) 2751 return ET->getDecl()->getPromotionType(); 2752 if (Promotable->isSignedIntegerType()) 2753 return IntTy; 2754 uint64_t PromotableSize = getTypeSize(Promotable); 2755 uint64_t IntSize = getTypeSize(IntTy); 2756 assert(Promotable->isUnsignedIntegerType() && PromotableSize <= IntSize); 2757 return (PromotableSize != IntSize) ? IntTy : UnsignedIntTy; 2758} 2759 2760/// getIntegerTypeOrder - Returns the highest ranked integer type: 2761/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 2762/// LHS < RHS, return -1. 2763int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) { 2764 Type *LHSC = getCanonicalType(LHS).getTypePtr(); 2765 Type *RHSC = getCanonicalType(RHS).getTypePtr(); 2766 if (LHSC == RHSC) return 0; 2767 2768 bool LHSUnsigned = LHSC->isUnsignedIntegerType(); 2769 bool RHSUnsigned = RHSC->isUnsignedIntegerType(); 2770 2771 unsigned LHSRank = getIntegerRank(LHSC); 2772 unsigned RHSRank = getIntegerRank(RHSC); 2773 2774 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned. 2775 if (LHSRank == RHSRank) return 0; 2776 return LHSRank > RHSRank ? 1 : -1; 2777 } 2778 2779 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa. 2780 if (LHSUnsigned) { 2781 // If the unsigned [LHS] type is larger, return it. 2782 if (LHSRank >= RHSRank) 2783 return 1; 2784 2785 // If the signed type can represent all values of the unsigned type, it 2786 // wins. Because we are dealing with 2's complement and types that are 2787 // powers of two larger than each other, this is always safe. 2788 return -1; 2789 } 2790 2791 // If the unsigned [RHS] type is larger, return it. 2792 if (RHSRank >= LHSRank) 2793 return -1; 2794 2795 // If the signed type can represent all values of the unsigned type, it 2796 // wins. Because we are dealing with 2's complement and types that are 2797 // powers of two larger than each other, this is always safe. 2798 return 1; 2799} 2800 2801static RecordDecl * 2802CreateRecordDecl(ASTContext &Ctx, RecordDecl::TagKind TK, DeclContext *DC, 2803 SourceLocation L, IdentifierInfo *Id) { 2804 if (Ctx.getLangOptions().CPlusPlus) 2805 return CXXRecordDecl::Create(Ctx, TK, DC, L, Id); 2806 else 2807 return RecordDecl::Create(Ctx, TK, DC, L, Id); 2808} 2809 2810// getCFConstantStringType - Return the type used for constant CFStrings. 2811QualType ASTContext::getCFConstantStringType() { 2812 if (!CFConstantStringTypeDecl) { 2813 CFConstantStringTypeDecl = 2814 CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 2815 &Idents.get("NSConstantString")); 2816 CFConstantStringTypeDecl->startDefinition(); 2817 2818 QualType FieldTypes[4]; 2819 2820 // const int *isa; 2821 FieldTypes[0] = getPointerType(IntTy.withConst()); 2822 // int flags; 2823 FieldTypes[1] = IntTy; 2824 // const char *str; 2825 FieldTypes[2] = getPointerType(CharTy.withConst()); 2826 // long length; 2827 FieldTypes[3] = LongTy; 2828 2829 // Create fields 2830 for (unsigned i = 0; i < 4; ++i) { 2831 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl, 2832 SourceLocation(), 0, 2833 FieldTypes[i], /*TInfo=*/0, 2834 /*BitWidth=*/0, 2835 /*Mutable=*/false); 2836 Field->setAccess(AS_public); 2837 CFConstantStringTypeDecl->addDecl(Field); 2838 } 2839 2840 CFConstantStringTypeDecl->completeDefinition(); 2841 } 2842 2843 return getTagDeclType(CFConstantStringTypeDecl); 2844} 2845 2846void ASTContext::setCFConstantStringType(QualType T) { 2847 const RecordType *Rec = T->getAs<RecordType>(); 2848 assert(Rec && "Invalid CFConstantStringType"); 2849 CFConstantStringTypeDecl = Rec->getDecl(); 2850} 2851 2852// getNSConstantStringType - Return the type used for constant NSStrings. 2853QualType ASTContext::getNSConstantStringType() { 2854 if (!NSConstantStringTypeDecl) { 2855 NSConstantStringTypeDecl = 2856 CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 2857 &Idents.get("__builtin_NSString")); 2858 NSConstantStringTypeDecl->startDefinition(); 2859 2860 QualType FieldTypes[3]; 2861 2862 // const int *isa; 2863 FieldTypes[0] = getPointerType(IntTy.withConst()); 2864 // const char *str; 2865 FieldTypes[1] = getPointerType(CharTy.withConst()); 2866 // unsigned int length; 2867 FieldTypes[2] = UnsignedIntTy; 2868 2869 // Create fields 2870 for (unsigned i = 0; i < 3; ++i) { 2871 FieldDecl *Field = FieldDecl::Create(*this, NSConstantStringTypeDecl, 2872 SourceLocation(), 0, 2873 FieldTypes[i], /*TInfo=*/0, 2874 /*BitWidth=*/0, 2875 /*Mutable=*/false); 2876 Field->setAccess(AS_public); 2877 NSConstantStringTypeDecl->addDecl(Field); 2878 } 2879 2880 NSConstantStringTypeDecl->completeDefinition(); 2881 } 2882 2883 return getTagDeclType(NSConstantStringTypeDecl); 2884} 2885 2886void ASTContext::setNSConstantStringType(QualType T) { 2887 const RecordType *Rec = T->getAs<RecordType>(); 2888 assert(Rec && "Invalid NSConstantStringType"); 2889 NSConstantStringTypeDecl = Rec->getDecl(); 2890} 2891 2892QualType ASTContext::getObjCFastEnumerationStateType() { 2893 if (!ObjCFastEnumerationStateTypeDecl) { 2894 ObjCFastEnumerationStateTypeDecl = 2895 CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 2896 &Idents.get("__objcFastEnumerationState")); 2897 ObjCFastEnumerationStateTypeDecl->startDefinition(); 2898 2899 QualType FieldTypes[] = { 2900 UnsignedLongTy, 2901 getPointerType(ObjCIdTypedefType), 2902 getPointerType(UnsignedLongTy), 2903 getConstantArrayType(UnsignedLongTy, 2904 llvm::APInt(32, 5), ArrayType::Normal, 0) 2905 }; 2906 2907 for (size_t i = 0; i < 4; ++i) { 2908 FieldDecl *Field = FieldDecl::Create(*this, 2909 ObjCFastEnumerationStateTypeDecl, 2910 SourceLocation(), 0, 2911 FieldTypes[i], /*TInfo=*/0, 2912 /*BitWidth=*/0, 2913 /*Mutable=*/false); 2914 Field->setAccess(AS_public); 2915 ObjCFastEnumerationStateTypeDecl->addDecl(Field); 2916 } 2917 2918 ObjCFastEnumerationStateTypeDecl->completeDefinition(); 2919 } 2920 2921 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 2922} 2923 2924QualType ASTContext::getBlockDescriptorType() { 2925 if (BlockDescriptorType) 2926 return getTagDeclType(BlockDescriptorType); 2927 2928 RecordDecl *T; 2929 // FIXME: Needs the FlagAppleBlock bit. 2930 T = CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 2931 &Idents.get("__block_descriptor")); 2932 T->startDefinition(); 2933 2934 QualType FieldTypes[] = { 2935 UnsignedLongTy, 2936 UnsignedLongTy, 2937 }; 2938 2939 const char *FieldNames[] = { 2940 "reserved", 2941 "Size" 2942 }; 2943 2944 for (size_t i = 0; i < 2; ++i) { 2945 FieldDecl *Field = FieldDecl::Create(*this, 2946 T, 2947 SourceLocation(), 2948 &Idents.get(FieldNames[i]), 2949 FieldTypes[i], /*TInfo=*/0, 2950 /*BitWidth=*/0, 2951 /*Mutable=*/false); 2952 Field->setAccess(AS_public); 2953 T->addDecl(Field); 2954 } 2955 2956 T->completeDefinition(); 2957 2958 BlockDescriptorType = T; 2959 2960 return getTagDeclType(BlockDescriptorType); 2961} 2962 2963void ASTContext::setBlockDescriptorType(QualType T) { 2964 const RecordType *Rec = T->getAs<RecordType>(); 2965 assert(Rec && "Invalid BlockDescriptorType"); 2966 BlockDescriptorType = Rec->getDecl(); 2967} 2968 2969QualType ASTContext::getBlockDescriptorExtendedType() { 2970 if (BlockDescriptorExtendedType) 2971 return getTagDeclType(BlockDescriptorExtendedType); 2972 2973 RecordDecl *T; 2974 // FIXME: Needs the FlagAppleBlock bit. 2975 T = CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 2976 &Idents.get("__block_descriptor_withcopydispose")); 2977 T->startDefinition(); 2978 2979 QualType FieldTypes[] = { 2980 UnsignedLongTy, 2981 UnsignedLongTy, 2982 getPointerType(VoidPtrTy), 2983 getPointerType(VoidPtrTy) 2984 }; 2985 2986 const char *FieldNames[] = { 2987 "reserved", 2988 "Size", 2989 "CopyFuncPtr", 2990 "DestroyFuncPtr" 2991 }; 2992 2993 for (size_t i = 0; i < 4; ++i) { 2994 FieldDecl *Field = FieldDecl::Create(*this, 2995 T, 2996 SourceLocation(), 2997 &Idents.get(FieldNames[i]), 2998 FieldTypes[i], /*TInfo=*/0, 2999 /*BitWidth=*/0, 3000 /*Mutable=*/false); 3001 Field->setAccess(AS_public); 3002 T->addDecl(Field); 3003 } 3004 3005 T->completeDefinition(); 3006 3007 BlockDescriptorExtendedType = T; 3008 3009 return getTagDeclType(BlockDescriptorExtendedType); 3010} 3011 3012void ASTContext::setBlockDescriptorExtendedType(QualType T) { 3013 const RecordType *Rec = T->getAs<RecordType>(); 3014 assert(Rec && "Invalid BlockDescriptorType"); 3015 BlockDescriptorExtendedType = Rec->getDecl(); 3016} 3017 3018bool ASTContext::BlockRequiresCopying(QualType Ty) { 3019 if (Ty->isBlockPointerType()) 3020 return true; 3021 if (isObjCNSObjectType(Ty)) 3022 return true; 3023 if (Ty->isObjCObjectPointerType()) 3024 return true; 3025 return false; 3026} 3027 3028QualType ASTContext::BuildByRefType(const char *DeclName, QualType Ty) { 3029 // type = struct __Block_byref_1_X { 3030 // void *__isa; 3031 // struct __Block_byref_1_X *__forwarding; 3032 // unsigned int __flags; 3033 // unsigned int __size; 3034 // void *__copy_helper; // as needed 3035 // void *__destroy_help // as needed 3036 // int X; 3037 // } * 3038 3039 bool HasCopyAndDispose = BlockRequiresCopying(Ty); 3040 3041 // FIXME: Move up 3042 static unsigned int UniqueBlockByRefTypeID = 0; 3043 llvm::SmallString<36> Name; 3044 llvm::raw_svector_ostream(Name) << "__Block_byref_" << 3045 ++UniqueBlockByRefTypeID << '_' << DeclName; 3046 RecordDecl *T; 3047 T = CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 3048 &Idents.get(Name.str())); 3049 T->startDefinition(); 3050 QualType Int32Ty = IntTy; 3051 assert(getIntWidth(IntTy) == 32 && "non-32bit int not supported"); 3052 QualType FieldTypes[] = { 3053 getPointerType(VoidPtrTy), 3054 getPointerType(getTagDeclType(T)), 3055 Int32Ty, 3056 Int32Ty, 3057 getPointerType(VoidPtrTy), 3058 getPointerType(VoidPtrTy), 3059 Ty 3060 }; 3061 3062 const char *FieldNames[] = { 3063 "__isa", 3064 "__forwarding", 3065 "__flags", 3066 "__size", 3067 "__copy_helper", 3068 "__destroy_helper", 3069 DeclName, 3070 }; 3071 3072 for (size_t i = 0; i < 7; ++i) { 3073 if (!HasCopyAndDispose && i >=4 && i <= 5) 3074 continue; 3075 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3076 &Idents.get(FieldNames[i]), 3077 FieldTypes[i], /*TInfo=*/0, 3078 /*BitWidth=*/0, /*Mutable=*/false); 3079 Field->setAccess(AS_public); 3080 T->addDecl(Field); 3081 } 3082 3083 T->completeDefinition(); 3084 3085 return getPointerType(getTagDeclType(T)); 3086} 3087 3088 3089QualType ASTContext::getBlockParmType( 3090 bool BlockHasCopyDispose, 3091 llvm::SmallVector<const Expr *, 8> &BlockDeclRefDecls) { 3092 // FIXME: Move up 3093 static unsigned int UniqueBlockParmTypeID = 0; 3094 llvm::SmallString<36> Name; 3095 llvm::raw_svector_ostream(Name) << "__block_literal_" 3096 << ++UniqueBlockParmTypeID; 3097 RecordDecl *T; 3098 T = CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 3099 &Idents.get(Name.str())); 3100 T->startDefinition(); 3101 QualType FieldTypes[] = { 3102 getPointerType(VoidPtrTy), 3103 IntTy, 3104 IntTy, 3105 getPointerType(VoidPtrTy), 3106 (BlockHasCopyDispose ? 3107 getPointerType(getBlockDescriptorExtendedType()) : 3108 getPointerType(getBlockDescriptorType())) 3109 }; 3110 3111 const char *FieldNames[] = { 3112 "__isa", 3113 "__flags", 3114 "__reserved", 3115 "__FuncPtr", 3116 "__descriptor" 3117 }; 3118 3119 for (size_t i = 0; i < 5; ++i) { 3120 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3121 &Idents.get(FieldNames[i]), 3122 FieldTypes[i], /*TInfo=*/0, 3123 /*BitWidth=*/0, /*Mutable=*/false); 3124 Field->setAccess(AS_public); 3125 T->addDecl(Field); 3126 } 3127 3128 for (size_t i = 0; i < BlockDeclRefDecls.size(); ++i) { 3129 const Expr *E = BlockDeclRefDecls[i]; 3130 const BlockDeclRefExpr *BDRE = dyn_cast<BlockDeclRefExpr>(E); 3131 clang::IdentifierInfo *Name = 0; 3132 if (BDRE) { 3133 const ValueDecl *D = BDRE->getDecl(); 3134 Name = &Idents.get(D->getName()); 3135 } 3136 QualType FieldType = E->getType(); 3137 3138 if (BDRE && BDRE->isByRef()) 3139 FieldType = BuildByRefType(BDRE->getDecl()->getNameAsCString(), 3140 FieldType); 3141 3142 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3143 Name, FieldType, /*TInfo=*/0, 3144 /*BitWidth=*/0, /*Mutable=*/false); 3145 Field->setAccess(AS_public); 3146 T->addDecl(Field); 3147 } 3148 3149 T->completeDefinition(); 3150 3151 return getPointerType(getTagDeclType(T)); 3152} 3153 3154void ASTContext::setObjCFastEnumerationStateType(QualType T) { 3155 const RecordType *Rec = T->getAs<RecordType>(); 3156 assert(Rec && "Invalid ObjCFAstEnumerationStateType"); 3157 ObjCFastEnumerationStateTypeDecl = Rec->getDecl(); 3158} 3159 3160// This returns true if a type has been typedefed to BOOL: 3161// typedef <type> BOOL; 3162static bool isTypeTypedefedAsBOOL(QualType T) { 3163 if (const TypedefType *TT = dyn_cast<TypedefType>(T)) 3164 if (IdentifierInfo *II = TT->getDecl()->getIdentifier()) 3165 return II->isStr("BOOL"); 3166 3167 return false; 3168} 3169 3170/// getObjCEncodingTypeSize returns size of type for objective-c encoding 3171/// purpose. 3172CharUnits ASTContext::getObjCEncodingTypeSize(QualType type) { 3173 CharUnits sz = getTypeSizeInChars(type); 3174 3175 // Make all integer and enum types at least as large as an int 3176 if (sz.isPositive() && type->isIntegralType()) 3177 sz = std::max(sz, getTypeSizeInChars(IntTy)); 3178 // Treat arrays as pointers, since that's how they're passed in. 3179 else if (type->isArrayType()) 3180 sz = getTypeSizeInChars(VoidPtrTy); 3181 return sz; 3182} 3183 3184static inline 3185std::string charUnitsToString(const CharUnits &CU) { 3186 return llvm::itostr(CU.getQuantity()); 3187} 3188 3189/// getObjCEncodingForBlockDecl - Return the encoded type for this block 3190/// declaration. 3191void ASTContext::getObjCEncodingForBlock(const BlockExpr *Expr, 3192 std::string& S) { 3193 const BlockDecl *Decl = Expr->getBlockDecl(); 3194 QualType BlockTy = 3195 Expr->getType()->getAs<BlockPointerType>()->getPointeeType(); 3196 // Encode result type. 3197 getObjCEncodingForType(cast<FunctionType>(BlockTy)->getResultType(), S); 3198 // Compute size of all parameters. 3199 // Start with computing size of a pointer in number of bytes. 3200 // FIXME: There might(should) be a better way of doing this computation! 3201 SourceLocation Loc; 3202 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3203 CharUnits ParmOffset = PtrSize; 3204 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), 3205 E = Decl->param_end(); PI != E; ++PI) { 3206 QualType PType = (*PI)->getType(); 3207 CharUnits sz = getObjCEncodingTypeSize(PType); 3208 assert (sz.isPositive() && "BlockExpr - Incomplete param type"); 3209 ParmOffset += sz; 3210 } 3211 // Size of the argument frame 3212 S += charUnitsToString(ParmOffset); 3213 // Block pointer and offset. 3214 S += "@?0"; 3215 ParmOffset = PtrSize; 3216 3217 // Argument types. 3218 ParmOffset = PtrSize; 3219 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), E = 3220 Decl->param_end(); PI != E; ++PI) { 3221 ParmVarDecl *PVDecl = *PI; 3222 QualType PType = PVDecl->getOriginalType(); 3223 if (const ArrayType *AT = 3224 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3225 // Use array's original type only if it has known number of 3226 // elements. 3227 if (!isa<ConstantArrayType>(AT)) 3228 PType = PVDecl->getType(); 3229 } else if (PType->isFunctionType()) 3230 PType = PVDecl->getType(); 3231 getObjCEncodingForType(PType, S); 3232 S += charUnitsToString(ParmOffset); 3233 ParmOffset += getObjCEncodingTypeSize(PType); 3234 } 3235} 3236 3237/// getObjCEncodingForMethodDecl - Return the encoded type for this method 3238/// declaration. 3239void ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, 3240 std::string& S) { 3241 // FIXME: This is not very efficient. 3242 // Encode type qualifer, 'in', 'inout', etc. for the return type. 3243 getObjCEncodingForTypeQualifier(Decl->getObjCDeclQualifier(), S); 3244 // Encode result type. 3245 getObjCEncodingForType(Decl->getResultType(), S); 3246 // Compute size of all parameters. 3247 // Start with computing size of a pointer in number of bytes. 3248 // FIXME: There might(should) be a better way of doing this computation! 3249 SourceLocation Loc; 3250 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3251 // The first two arguments (self and _cmd) are pointers; account for 3252 // their size. 3253 CharUnits ParmOffset = 2 * PtrSize; 3254 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3255 E = Decl->sel_param_end(); PI != E; ++PI) { 3256 QualType PType = (*PI)->getType(); 3257 CharUnits sz = getObjCEncodingTypeSize(PType); 3258 assert (sz.isPositive() && 3259 "getObjCEncodingForMethodDecl - Incomplete param type"); 3260 ParmOffset += sz; 3261 } 3262 S += charUnitsToString(ParmOffset); 3263 S += "@0:"; 3264 S += charUnitsToString(PtrSize); 3265 3266 // Argument types. 3267 ParmOffset = 2 * PtrSize; 3268 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3269 E = Decl->sel_param_end(); PI != E; ++PI) { 3270 ParmVarDecl *PVDecl = *PI; 3271 QualType PType = PVDecl->getOriginalType(); 3272 if (const ArrayType *AT = 3273 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3274 // Use array's original type only if it has known number of 3275 // elements. 3276 if (!isa<ConstantArrayType>(AT)) 3277 PType = PVDecl->getType(); 3278 } else if (PType->isFunctionType()) 3279 PType = PVDecl->getType(); 3280 // Process argument qualifiers for user supplied arguments; such as, 3281 // 'in', 'inout', etc. 3282 getObjCEncodingForTypeQualifier(PVDecl->getObjCDeclQualifier(), S); 3283 getObjCEncodingForType(PType, S); 3284 S += charUnitsToString(ParmOffset); 3285 ParmOffset += getObjCEncodingTypeSize(PType); 3286 } 3287} 3288 3289/// getObjCEncodingForPropertyDecl - Return the encoded type for this 3290/// property declaration. If non-NULL, Container must be either an 3291/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be 3292/// NULL when getting encodings for protocol properties. 3293/// Property attributes are stored as a comma-delimited C string. The simple 3294/// attributes readonly and bycopy are encoded as single characters. The 3295/// parametrized attributes, getter=name, setter=name, and ivar=name, are 3296/// encoded as single characters, followed by an identifier. Property types 3297/// are also encoded as a parametrized attribute. The characters used to encode 3298/// these attributes are defined by the following enumeration: 3299/// @code 3300/// enum PropertyAttributes { 3301/// kPropertyReadOnly = 'R', // property is read-only. 3302/// kPropertyBycopy = 'C', // property is a copy of the value last assigned 3303/// kPropertyByref = '&', // property is a reference to the value last assigned 3304/// kPropertyDynamic = 'D', // property is dynamic 3305/// kPropertyGetter = 'G', // followed by getter selector name 3306/// kPropertySetter = 'S', // followed by setter selector name 3307/// kPropertyInstanceVariable = 'V' // followed by instance variable name 3308/// kPropertyType = 't' // followed by old-style type encoding. 3309/// kPropertyWeak = 'W' // 'weak' property 3310/// kPropertyStrong = 'P' // property GC'able 3311/// kPropertyNonAtomic = 'N' // property non-atomic 3312/// }; 3313/// @endcode 3314void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 3315 const Decl *Container, 3316 std::string& S) { 3317 // Collect information from the property implementation decl(s). 3318 bool Dynamic = false; 3319 ObjCPropertyImplDecl *SynthesizePID = 0; 3320 3321 // FIXME: Duplicated code due to poor abstraction. 3322 if (Container) { 3323 if (const ObjCCategoryImplDecl *CID = 3324 dyn_cast<ObjCCategoryImplDecl>(Container)) { 3325 for (ObjCCategoryImplDecl::propimpl_iterator 3326 i = CID->propimpl_begin(), e = CID->propimpl_end(); 3327 i != e; ++i) { 3328 ObjCPropertyImplDecl *PID = *i; 3329 if (PID->getPropertyDecl() == PD) { 3330 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3331 Dynamic = true; 3332 } else { 3333 SynthesizePID = PID; 3334 } 3335 } 3336 } 3337 } else { 3338 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container); 3339 for (ObjCCategoryImplDecl::propimpl_iterator 3340 i = OID->propimpl_begin(), e = OID->propimpl_end(); 3341 i != e; ++i) { 3342 ObjCPropertyImplDecl *PID = *i; 3343 if (PID->getPropertyDecl() == PD) { 3344 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3345 Dynamic = true; 3346 } else { 3347 SynthesizePID = PID; 3348 } 3349 } 3350 } 3351 } 3352 } 3353 3354 // FIXME: This is not very efficient. 3355 S = "T"; 3356 3357 // Encode result type. 3358 // GCC has some special rules regarding encoding of properties which 3359 // closely resembles encoding of ivars. 3360 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, 0, 3361 true /* outermost type */, 3362 true /* encoding for property */); 3363 3364 if (PD->isReadOnly()) { 3365 S += ",R"; 3366 } else { 3367 switch (PD->getSetterKind()) { 3368 case ObjCPropertyDecl::Assign: break; 3369 case ObjCPropertyDecl::Copy: S += ",C"; break; 3370 case ObjCPropertyDecl::Retain: S += ",&"; break; 3371 } 3372 } 3373 3374 // It really isn't clear at all what this means, since properties 3375 // are "dynamic by default". 3376 if (Dynamic) 3377 S += ",D"; 3378 3379 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) 3380 S += ",N"; 3381 3382 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) { 3383 S += ",G"; 3384 S += PD->getGetterName().getAsString(); 3385 } 3386 3387 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) { 3388 S += ",S"; 3389 S += PD->getSetterName().getAsString(); 3390 } 3391 3392 if (SynthesizePID) { 3393 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl(); 3394 S += ",V"; 3395 S += OID->getNameAsString(); 3396 } 3397 3398 // FIXME: OBJCGC: weak & strong 3399} 3400 3401/// getLegacyIntegralTypeEncoding - 3402/// Another legacy compatibility encoding: 32-bit longs are encoded as 3403/// 'l' or 'L' , but not always. For typedefs, we need to use 3404/// 'i' or 'I' instead if encoding a struct field, or a pointer! 3405/// 3406void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const { 3407 if (isa<TypedefType>(PointeeTy.getTypePtr())) { 3408 if (const BuiltinType *BT = PointeeTy->getAs<BuiltinType>()) { 3409 if (BT->getKind() == BuiltinType::ULong && 3410 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3411 PointeeTy = UnsignedIntTy; 3412 else 3413 if (BT->getKind() == BuiltinType::Long && 3414 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3415 PointeeTy = IntTy; 3416 } 3417 } 3418} 3419 3420void ASTContext::getObjCEncodingForType(QualType T, std::string& S, 3421 const FieldDecl *Field) { 3422 // We follow the behavior of gcc, expanding structures which are 3423 // directly pointed to, and expanding embedded structures. Note that 3424 // these rules are sufficient to prevent recursive encoding of the 3425 // same type. 3426 getObjCEncodingForTypeImpl(T, S, true, true, Field, 3427 true /* outermost type */); 3428} 3429 3430static void EncodeBitField(const ASTContext *Context, std::string& S, 3431 const FieldDecl *FD) { 3432 const Expr *E = FD->getBitWidth(); 3433 assert(E && "bitfield width not there - getObjCEncodingForTypeImpl"); 3434 ASTContext *Ctx = const_cast<ASTContext*>(Context); 3435 unsigned N = E->EvaluateAsInt(*Ctx).getZExtValue(); 3436 S += 'b'; 3437 S += llvm::utostr(N); 3438} 3439 3440// FIXME: Use SmallString for accumulating string. 3441void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S, 3442 bool ExpandPointedToStructures, 3443 bool ExpandStructures, 3444 const FieldDecl *FD, 3445 bool OutermostType, 3446 bool EncodingProperty) { 3447 if (const BuiltinType *BT = T->getAs<BuiltinType>()) { 3448 if (FD && FD->isBitField()) 3449 return EncodeBitField(this, S, FD); 3450 char encoding; 3451 switch (BT->getKind()) { 3452 default: assert(0 && "Unhandled builtin type kind"); 3453 case BuiltinType::Void: encoding = 'v'; break; 3454 case BuiltinType::Bool: encoding = 'B'; break; 3455 case BuiltinType::Char_U: 3456 case BuiltinType::UChar: encoding = 'C'; break; 3457 case BuiltinType::UShort: encoding = 'S'; break; 3458 case BuiltinType::UInt: encoding = 'I'; break; 3459 case BuiltinType::ULong: 3460 encoding = 3461 (const_cast<ASTContext *>(this))->getIntWidth(T) == 32 ? 'L' : 'Q'; 3462 break; 3463 case BuiltinType::UInt128: encoding = 'T'; break; 3464 case BuiltinType::ULongLong: encoding = 'Q'; break; 3465 case BuiltinType::Char_S: 3466 case BuiltinType::SChar: encoding = 'c'; break; 3467 case BuiltinType::Short: encoding = 's'; break; 3468 case BuiltinType::Int: encoding = 'i'; break; 3469 case BuiltinType::Long: 3470 encoding = 3471 (const_cast<ASTContext *>(this))->getIntWidth(T) == 32 ? 'l' : 'q'; 3472 break; 3473 case BuiltinType::LongLong: encoding = 'q'; break; 3474 case BuiltinType::Int128: encoding = 't'; break; 3475 case BuiltinType::Float: encoding = 'f'; break; 3476 case BuiltinType::Double: encoding = 'd'; break; 3477 case BuiltinType::LongDouble: encoding = 'd'; break; 3478 } 3479 3480 S += encoding; 3481 return; 3482 } 3483 3484 if (const ComplexType *CT = T->getAs<ComplexType>()) { 3485 S += 'j'; 3486 getObjCEncodingForTypeImpl(CT->getElementType(), S, false, false, 0, false, 3487 false); 3488 return; 3489 } 3490 3491 // encoding for pointer or r3eference types. 3492 QualType PointeeTy; 3493 if (const PointerType *PT = T->getAs<PointerType>()) { 3494 if (PT->isObjCSelType()) { 3495 S += ':'; 3496 return; 3497 } 3498 PointeeTy = PT->getPointeeType(); 3499 } 3500 else if (const ReferenceType *RT = T->getAs<ReferenceType>()) 3501 PointeeTy = RT->getPointeeType(); 3502 if (!PointeeTy.isNull()) { 3503 bool isReadOnly = false; 3504 // For historical/compatibility reasons, the read-only qualifier of the 3505 // pointee gets emitted _before_ the '^'. The read-only qualifier of 3506 // the pointer itself gets ignored, _unless_ we are looking at a typedef! 3507 // Also, do not emit the 'r' for anything but the outermost type! 3508 if (isa<TypedefType>(T.getTypePtr())) { 3509 if (OutermostType && T.isConstQualified()) { 3510 isReadOnly = true; 3511 S += 'r'; 3512 } 3513 } else if (OutermostType) { 3514 QualType P = PointeeTy; 3515 while (P->getAs<PointerType>()) 3516 P = P->getAs<PointerType>()->getPointeeType(); 3517 if (P.isConstQualified()) { 3518 isReadOnly = true; 3519 S += 'r'; 3520 } 3521 } 3522 if (isReadOnly) { 3523 // Another legacy compatibility encoding. Some ObjC qualifier and type 3524 // combinations need to be rearranged. 3525 // Rewrite "in const" from "nr" to "rn" 3526 if (llvm::StringRef(S).endswith("nr")) 3527 S.replace(S.end()-2, S.end(), "rn"); 3528 } 3529 3530 if (PointeeTy->isCharType()) { 3531 // char pointer types should be encoded as '*' unless it is a 3532 // type that has been typedef'd to 'BOOL'. 3533 if (!isTypeTypedefedAsBOOL(PointeeTy)) { 3534 S += '*'; 3535 return; 3536 } 3537 } else if (const RecordType *RTy = PointeeTy->getAs<RecordType>()) { 3538 // GCC binary compat: Need to convert "struct objc_class *" to "#". 3539 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_class")) { 3540 S += '#'; 3541 return; 3542 } 3543 // GCC binary compat: Need to convert "struct objc_object *" to "@". 3544 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_object")) { 3545 S += '@'; 3546 return; 3547 } 3548 // fall through... 3549 } 3550 S += '^'; 3551 getLegacyIntegralTypeEncoding(PointeeTy); 3552 3553 getObjCEncodingForTypeImpl(PointeeTy, S, false, ExpandPointedToStructures, 3554 NULL); 3555 return; 3556 } 3557 3558 if (const ArrayType *AT = 3559 // Ignore type qualifiers etc. 3560 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) { 3561 if (isa<IncompleteArrayType>(AT)) { 3562 // Incomplete arrays are encoded as a pointer to the array element. 3563 S += '^'; 3564 3565 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3566 false, ExpandStructures, FD); 3567 } else { 3568 S += '['; 3569 3570 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 3571 S += llvm::utostr(CAT->getSize().getZExtValue()); 3572 else { 3573 //Variable length arrays are encoded as a regular array with 0 elements. 3574 assert(isa<VariableArrayType>(AT) && "Unknown array type!"); 3575 S += '0'; 3576 } 3577 3578 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3579 false, ExpandStructures, FD); 3580 S += ']'; 3581 } 3582 return; 3583 } 3584 3585 if (T->getAs<FunctionType>()) { 3586 S += '?'; 3587 return; 3588 } 3589 3590 if (const RecordType *RTy = T->getAs<RecordType>()) { 3591 RecordDecl *RDecl = RTy->getDecl(); 3592 S += RDecl->isUnion() ? '(' : '{'; 3593 // Anonymous structures print as '?' 3594 if (const IdentifierInfo *II = RDecl->getIdentifier()) { 3595 S += II->getName(); 3596 } else { 3597 S += '?'; 3598 } 3599 if (ExpandStructures) { 3600 S += '='; 3601 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 3602 FieldEnd = RDecl->field_end(); 3603 Field != FieldEnd; ++Field) { 3604 if (FD) { 3605 S += '"'; 3606 S += Field->getNameAsString(); 3607 S += '"'; 3608 } 3609 3610 // Special case bit-fields. 3611 if (Field->isBitField()) { 3612 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, 3613 (*Field)); 3614 } else { 3615 QualType qt = Field->getType(); 3616 getLegacyIntegralTypeEncoding(qt); 3617 getObjCEncodingForTypeImpl(qt, S, false, true, 3618 FD); 3619 } 3620 } 3621 } 3622 S += RDecl->isUnion() ? ')' : '}'; 3623 return; 3624 } 3625 3626 if (T->isEnumeralType()) { 3627 if (FD && FD->isBitField()) 3628 EncodeBitField(this, S, FD); 3629 else 3630 S += 'i'; 3631 return; 3632 } 3633 3634 if (T->isBlockPointerType()) { 3635 S += "@?"; // Unlike a pointer-to-function, which is "^?". 3636 return; 3637 } 3638 3639 if (const ObjCInterfaceType *OIT = T->getAs<ObjCInterfaceType>()) { 3640 // @encode(class_name) 3641 ObjCInterfaceDecl *OI = OIT->getDecl(); 3642 S += '{'; 3643 const IdentifierInfo *II = OI->getIdentifier(); 3644 S += II->getName(); 3645 S += '='; 3646 llvm::SmallVector<FieldDecl*, 32> RecFields; 3647 CollectObjCIvars(OI, RecFields); 3648 for (unsigned i = 0, e = RecFields.size(); i != e; ++i) { 3649 if (RecFields[i]->isBitField()) 3650 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 3651 RecFields[i]); 3652 else 3653 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 3654 FD); 3655 } 3656 S += '}'; 3657 return; 3658 } 3659 3660 if (const ObjCObjectPointerType *OPT = T->getAs<ObjCObjectPointerType>()) { 3661 if (OPT->isObjCIdType()) { 3662 S += '@'; 3663 return; 3664 } 3665 3666 if (OPT->isObjCClassType() || OPT->isObjCQualifiedClassType()) { 3667 // FIXME: Consider if we need to output qualifiers for 'Class<p>'. 3668 // Since this is a binary compatibility issue, need to consult with runtime 3669 // folks. Fortunately, this is a *very* obsure construct. 3670 S += '#'; 3671 return; 3672 } 3673 3674 if (OPT->isObjCQualifiedIdType()) { 3675 getObjCEncodingForTypeImpl(getObjCIdType(), S, 3676 ExpandPointedToStructures, 3677 ExpandStructures, FD); 3678 if (FD || EncodingProperty) { 3679 // Note that we do extended encoding of protocol qualifer list 3680 // Only when doing ivar or property encoding. 3681 S += '"'; 3682 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 3683 E = OPT->qual_end(); I != E; ++I) { 3684 S += '<'; 3685 S += (*I)->getNameAsString(); 3686 S += '>'; 3687 } 3688 S += '"'; 3689 } 3690 return; 3691 } 3692 3693 QualType PointeeTy = OPT->getPointeeType(); 3694 if (!EncodingProperty && 3695 isa<TypedefType>(PointeeTy.getTypePtr())) { 3696 // Another historical/compatibility reason. 3697 // We encode the underlying type which comes out as 3698 // {...}; 3699 S += '^'; 3700 getObjCEncodingForTypeImpl(PointeeTy, S, 3701 false, ExpandPointedToStructures, 3702 NULL); 3703 return; 3704 } 3705 3706 S += '@'; 3707 if (OPT->getInterfaceDecl() && (FD || EncodingProperty)) { 3708 S += '"'; 3709 S += OPT->getInterfaceDecl()->getIdentifier()->getName(); 3710 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 3711 E = OPT->qual_end(); I != E; ++I) { 3712 S += '<'; 3713 S += (*I)->getNameAsString(); 3714 S += '>'; 3715 } 3716 S += '"'; 3717 } 3718 return; 3719 } 3720 3721 assert(0 && "@encode for type not implemented!"); 3722} 3723 3724void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 3725 std::string& S) const { 3726 if (QT & Decl::OBJC_TQ_In) 3727 S += 'n'; 3728 if (QT & Decl::OBJC_TQ_Inout) 3729 S += 'N'; 3730 if (QT & Decl::OBJC_TQ_Out) 3731 S += 'o'; 3732 if (QT & Decl::OBJC_TQ_Bycopy) 3733 S += 'O'; 3734 if (QT & Decl::OBJC_TQ_Byref) 3735 S += 'R'; 3736 if (QT & Decl::OBJC_TQ_Oneway) 3737 S += 'V'; 3738} 3739 3740void ASTContext::setBuiltinVaListType(QualType T) { 3741 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!"); 3742 3743 BuiltinVaListType = T; 3744} 3745 3746void ASTContext::setObjCIdType(QualType T) { 3747 ObjCIdTypedefType = T; 3748} 3749 3750void ASTContext::setObjCSelType(QualType T) { 3751 ObjCSelTypedefType = T; 3752} 3753 3754void ASTContext::setObjCProtoType(QualType QT) { 3755 ObjCProtoType = QT; 3756} 3757 3758void ASTContext::setObjCClassType(QualType T) { 3759 ObjCClassTypedefType = T; 3760} 3761 3762void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) { 3763 assert(ObjCConstantStringType.isNull() && 3764 "'NSConstantString' type already set!"); 3765 3766 ObjCConstantStringType = getObjCInterfaceType(Decl); 3767} 3768 3769/// \brief Retrieve the template name that corresponds to a non-empty 3770/// lookup. 3771TemplateName ASTContext::getOverloadedTemplateName(UnresolvedSetIterator Begin, 3772 UnresolvedSetIterator End) { 3773 unsigned size = End - Begin; 3774 assert(size > 1 && "set is not overloaded!"); 3775 3776 void *memory = Allocate(sizeof(OverloadedTemplateStorage) + 3777 size * sizeof(FunctionTemplateDecl*)); 3778 OverloadedTemplateStorage *OT = new(memory) OverloadedTemplateStorage(size); 3779 3780 NamedDecl **Storage = OT->getStorage(); 3781 for (UnresolvedSetIterator I = Begin; I != End; ++I) { 3782 NamedDecl *D = *I; 3783 assert(isa<FunctionTemplateDecl>(D) || 3784 (isa<UsingShadowDecl>(D) && 3785 isa<FunctionTemplateDecl>(D->getUnderlyingDecl()))); 3786 *Storage++ = D; 3787 } 3788 3789 return TemplateName(OT); 3790} 3791 3792/// \brief Retrieve the template name that represents a qualified 3793/// template name such as \c std::vector. 3794TemplateName ASTContext::getQualifiedTemplateName(NestedNameSpecifier *NNS, 3795 bool TemplateKeyword, 3796 TemplateDecl *Template) { 3797 // FIXME: Canonicalization? 3798 llvm::FoldingSetNodeID ID; 3799 QualifiedTemplateName::Profile(ID, NNS, TemplateKeyword, Template); 3800 3801 void *InsertPos = 0; 3802 QualifiedTemplateName *QTN = 3803 QualifiedTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3804 if (!QTN) { 3805 QTN = new (*this,4) QualifiedTemplateName(NNS, TemplateKeyword, Template); 3806 QualifiedTemplateNames.InsertNode(QTN, InsertPos); 3807 } 3808 3809 return TemplateName(QTN); 3810} 3811 3812/// \brief Retrieve the template name that represents a dependent 3813/// template name such as \c MetaFun::template apply. 3814TemplateName ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 3815 const IdentifierInfo *Name) { 3816 assert((!NNS || NNS->isDependent()) && 3817 "Nested name specifier must be dependent"); 3818 3819 llvm::FoldingSetNodeID ID; 3820 DependentTemplateName::Profile(ID, NNS, Name); 3821 3822 void *InsertPos = 0; 3823 DependentTemplateName *QTN = 3824 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3825 3826 if (QTN) 3827 return TemplateName(QTN); 3828 3829 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 3830 if (CanonNNS == NNS) { 3831 QTN = new (*this,4) DependentTemplateName(NNS, Name); 3832 } else { 3833 TemplateName Canon = getDependentTemplateName(CanonNNS, Name); 3834 QTN = new (*this,4) DependentTemplateName(NNS, Name, Canon); 3835 DependentTemplateName *CheckQTN = 3836 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3837 assert(!CheckQTN && "Dependent type name canonicalization broken"); 3838 (void)CheckQTN; 3839 } 3840 3841 DependentTemplateNames.InsertNode(QTN, InsertPos); 3842 return TemplateName(QTN); 3843} 3844 3845/// \brief Retrieve the template name that represents a dependent 3846/// template name such as \c MetaFun::template operator+. 3847TemplateName 3848ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 3849 OverloadedOperatorKind Operator) { 3850 assert((!NNS || NNS->isDependent()) && 3851 "Nested name specifier must be dependent"); 3852 3853 llvm::FoldingSetNodeID ID; 3854 DependentTemplateName::Profile(ID, NNS, Operator); 3855 3856 void *InsertPos = 0; 3857 DependentTemplateName *QTN 3858 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3859 3860 if (QTN) 3861 return TemplateName(QTN); 3862 3863 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 3864 if (CanonNNS == NNS) { 3865 QTN = new (*this,4) DependentTemplateName(NNS, Operator); 3866 } else { 3867 TemplateName Canon = getDependentTemplateName(CanonNNS, Operator); 3868 QTN = new (*this,4) DependentTemplateName(NNS, Operator, Canon); 3869 3870 DependentTemplateName *CheckQTN 3871 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3872 assert(!CheckQTN && "Dependent template name canonicalization broken"); 3873 (void)CheckQTN; 3874 } 3875 3876 DependentTemplateNames.InsertNode(QTN, InsertPos); 3877 return TemplateName(QTN); 3878} 3879 3880/// getFromTargetType - Given one of the integer types provided by 3881/// TargetInfo, produce the corresponding type. The unsigned @p Type 3882/// is actually a value of type @c TargetInfo::IntType. 3883CanQualType ASTContext::getFromTargetType(unsigned Type) const { 3884 switch (Type) { 3885 case TargetInfo::NoInt: return CanQualType(); 3886 case TargetInfo::SignedShort: return ShortTy; 3887 case TargetInfo::UnsignedShort: return UnsignedShortTy; 3888 case TargetInfo::SignedInt: return IntTy; 3889 case TargetInfo::UnsignedInt: return UnsignedIntTy; 3890 case TargetInfo::SignedLong: return LongTy; 3891 case TargetInfo::UnsignedLong: return UnsignedLongTy; 3892 case TargetInfo::SignedLongLong: return LongLongTy; 3893 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy; 3894 } 3895 3896 assert(false && "Unhandled TargetInfo::IntType value"); 3897 return CanQualType(); 3898} 3899 3900//===----------------------------------------------------------------------===// 3901// Type Predicates. 3902//===----------------------------------------------------------------------===// 3903 3904/// isObjCNSObjectType - Return true if this is an NSObject object using 3905/// NSObject attribute on a c-style pointer type. 3906/// FIXME - Make it work directly on types. 3907/// FIXME: Move to Type. 3908/// 3909bool ASTContext::isObjCNSObjectType(QualType Ty) const { 3910 if (TypedefType *TDT = dyn_cast<TypedefType>(Ty)) { 3911 if (TypedefDecl *TD = TDT->getDecl()) 3912 if (TD->getAttr<ObjCNSObjectAttr>()) 3913 return true; 3914 } 3915 return false; 3916} 3917 3918/// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 3919/// garbage collection attribute. 3920/// 3921Qualifiers::GC ASTContext::getObjCGCAttrKind(const QualType &Ty) const { 3922 Qualifiers::GC GCAttrs = Qualifiers::GCNone; 3923 if (getLangOptions().ObjC1 && 3924 getLangOptions().getGCMode() != LangOptions::NonGC) { 3925 GCAttrs = Ty.getObjCGCAttr(); 3926 // Default behavious under objective-c's gc is for objective-c pointers 3927 // (or pointers to them) be treated as though they were declared 3928 // as __strong. 3929 if (GCAttrs == Qualifiers::GCNone) { 3930 if (Ty->isObjCObjectPointerType() || Ty->isBlockPointerType()) 3931 GCAttrs = Qualifiers::Strong; 3932 else if (Ty->isPointerType()) 3933 return getObjCGCAttrKind(Ty->getAs<PointerType>()->getPointeeType()); 3934 } 3935 // Non-pointers have none gc'able attribute regardless of the attribute 3936 // set on them. 3937 else if (!Ty->isAnyPointerType() && !Ty->isBlockPointerType()) 3938 return Qualifiers::GCNone; 3939 } 3940 return GCAttrs; 3941} 3942 3943//===----------------------------------------------------------------------===// 3944// Type Compatibility Testing 3945//===----------------------------------------------------------------------===// 3946 3947/// areCompatVectorTypes - Return true if the two specified vector types are 3948/// compatible. 3949static bool areCompatVectorTypes(const VectorType *LHS, 3950 const VectorType *RHS) { 3951 assert(LHS->isCanonicalUnqualified() && RHS->isCanonicalUnqualified()); 3952 return LHS->getElementType() == RHS->getElementType() && 3953 LHS->getNumElements() == RHS->getNumElements(); 3954} 3955 3956//===----------------------------------------------------------------------===// 3957// ObjCQualifiedIdTypesAreCompatible - Compatibility testing for qualified id's. 3958//===----------------------------------------------------------------------===// 3959 3960/// ProtocolCompatibleWithProtocol - return 'true' if 'lProto' is in the 3961/// inheritance hierarchy of 'rProto'. 3962bool ASTContext::ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 3963 ObjCProtocolDecl *rProto) { 3964 if (lProto == rProto) 3965 return true; 3966 for (ObjCProtocolDecl::protocol_iterator PI = rProto->protocol_begin(), 3967 E = rProto->protocol_end(); PI != E; ++PI) 3968 if (ProtocolCompatibleWithProtocol(lProto, *PI)) 3969 return true; 3970 return false; 3971} 3972 3973/// QualifiedIdConformsQualifiedId - compare id<p,...> with id<p1,...> 3974/// return true if lhs's protocols conform to rhs's protocol; false 3975/// otherwise. 3976bool ASTContext::QualifiedIdConformsQualifiedId(QualType lhs, QualType rhs) { 3977 if (lhs->isObjCQualifiedIdType() && rhs->isObjCQualifiedIdType()) 3978 return ObjCQualifiedIdTypesAreCompatible(lhs, rhs, false); 3979 return false; 3980} 3981 3982/// ObjCQualifiedIdTypesAreCompatible - We know that one of lhs/rhs is an 3983/// ObjCQualifiedIDType. 3984bool ASTContext::ObjCQualifiedIdTypesAreCompatible(QualType lhs, QualType rhs, 3985 bool compare) { 3986 // Allow id<P..> and an 'id' or void* type in all cases. 3987 if (lhs->isVoidPointerType() || 3988 lhs->isObjCIdType() || lhs->isObjCClassType()) 3989 return true; 3990 else if (rhs->isVoidPointerType() || 3991 rhs->isObjCIdType() || rhs->isObjCClassType()) 3992 return true; 3993 3994 if (const ObjCObjectPointerType *lhsQID = lhs->getAsObjCQualifiedIdType()) { 3995 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 3996 3997 if (!rhsOPT) return false; 3998 3999 if (rhsOPT->qual_empty()) { 4000 // If the RHS is a unqualified interface pointer "NSString*", 4001 // make sure we check the class hierarchy. 4002 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4003 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4004 E = lhsQID->qual_end(); I != E; ++I) { 4005 // when comparing an id<P> on lhs with a static type on rhs, 4006 // see if static class implements all of id's protocols, directly or 4007 // through its super class and categories. 4008 if (!rhsID->ClassImplementsProtocol(*I, true)) 4009 return false; 4010 } 4011 } 4012 // If there are no qualifiers and no interface, we have an 'id'. 4013 return true; 4014 } 4015 // Both the right and left sides have qualifiers. 4016 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4017 E = lhsQID->qual_end(); I != E; ++I) { 4018 ObjCProtocolDecl *lhsProto = *I; 4019 bool match = false; 4020 4021 // when comparing an id<P> on lhs with a static type on rhs, 4022 // see if static class implements all of id's protocols, directly or 4023 // through its super class and categories. 4024 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 4025 E = rhsOPT->qual_end(); J != E; ++J) { 4026 ObjCProtocolDecl *rhsProto = *J; 4027 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4028 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4029 match = true; 4030 break; 4031 } 4032 } 4033 // If the RHS is a qualified interface pointer "NSString<P>*", 4034 // make sure we check the class hierarchy. 4035 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4036 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4037 E = lhsQID->qual_end(); I != E; ++I) { 4038 // when comparing an id<P> on lhs with a static type on rhs, 4039 // see if static class implements all of id's protocols, directly or 4040 // through its super class and categories. 4041 if (rhsID->ClassImplementsProtocol(*I, true)) { 4042 match = true; 4043 break; 4044 } 4045 } 4046 } 4047 if (!match) 4048 return false; 4049 } 4050 4051 return true; 4052 } 4053 4054 const ObjCObjectPointerType *rhsQID = rhs->getAsObjCQualifiedIdType(); 4055 assert(rhsQID && "One of the LHS/RHS should be id<x>"); 4056 4057 if (const ObjCObjectPointerType *lhsOPT = 4058 lhs->getAsObjCInterfacePointerType()) { 4059 if (lhsOPT->qual_empty()) { 4060 bool match = false; 4061 if (ObjCInterfaceDecl *lhsID = lhsOPT->getInterfaceDecl()) { 4062 for (ObjCObjectPointerType::qual_iterator I = rhsQID->qual_begin(), 4063 E = rhsQID->qual_end(); I != E; ++I) { 4064 // when comparing an id<P> on lhs with a static type on rhs, 4065 // see if static class implements all of id's protocols, directly or 4066 // through its super class and categories. 4067 if (lhsID->ClassImplementsProtocol(*I, true)) { 4068 match = true; 4069 break; 4070 } 4071 } 4072 if (!match) 4073 return false; 4074 } 4075 return true; 4076 } 4077 // Both the right and left sides have qualifiers. 4078 for (ObjCObjectPointerType::qual_iterator I = lhsOPT->qual_begin(), 4079 E = lhsOPT->qual_end(); I != E; ++I) { 4080 ObjCProtocolDecl *lhsProto = *I; 4081 bool match = false; 4082 4083 // when comparing an id<P> on lhs with a static type on rhs, 4084 // see if static class implements all of id's protocols, directly or 4085 // through its super class and categories. 4086 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 4087 E = rhsQID->qual_end(); J != E; ++J) { 4088 ObjCProtocolDecl *rhsProto = *J; 4089 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4090 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4091 match = true; 4092 break; 4093 } 4094 } 4095 if (!match) 4096 return false; 4097 } 4098 return true; 4099 } 4100 return false; 4101} 4102 4103/// canAssignObjCInterfaces - Return true if the two interface types are 4104/// compatible for assignment from RHS to LHS. This handles validation of any 4105/// protocol qualifiers on the LHS or RHS. 4106/// 4107bool ASTContext::canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 4108 const ObjCObjectPointerType *RHSOPT) { 4109 // If either type represents the built-in 'id' or 'Class' types, return true. 4110 if (LHSOPT->isObjCBuiltinType() || RHSOPT->isObjCBuiltinType()) 4111 return true; 4112 4113 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 4114 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4115 QualType(RHSOPT,0), 4116 false); 4117 4118 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4119 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4120 if (LHS && RHS) // We have 2 user-defined types. 4121 return canAssignObjCInterfaces(LHS, RHS); 4122 4123 return false; 4124} 4125 4126/// canAssignObjCInterfacesInBlockPointer - This routine is specifically written 4127/// for providing type-safty for objective-c pointers used to pass/return 4128/// arguments in block literals. When passed as arguments, passing 'A*' where 4129/// 'id' is expected is not OK. Passing 'Sub *" where 'Super *" is expected is 4130/// not OK. For the return type, the opposite is not OK. 4131bool ASTContext::canAssignObjCInterfacesInBlockPointer( 4132 const ObjCObjectPointerType *LHSOPT, 4133 const ObjCObjectPointerType *RHSOPT) { 4134 if (RHSOPT->isObjCBuiltinType() || LHSOPT->isObjCIdType()) 4135 return true; 4136 4137 if (LHSOPT->isObjCBuiltinType()) { 4138 return RHSOPT->isObjCBuiltinType() || RHSOPT->isObjCQualifiedIdType(); 4139 } 4140 4141 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 4142 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4143 QualType(RHSOPT,0), 4144 false); 4145 4146 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4147 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4148 if (LHS && RHS) { // We have 2 user-defined types. 4149 if (LHS != RHS) { 4150 if (LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 4151 return false; 4152 if (RHS->getDecl()->isSuperClassOf(LHS->getDecl())) 4153 return true; 4154 } 4155 else 4156 return true; 4157 } 4158 return false; 4159} 4160 4161/// getIntersectionOfProtocols - This routine finds the intersection of set 4162/// of protocols inherited from two distinct objective-c pointer objects. 4163/// It is used to build composite qualifier list of the composite type of 4164/// the conditional expression involving two objective-c pointer objects. 4165static 4166void getIntersectionOfProtocols(ASTContext &Context, 4167 const ObjCObjectPointerType *LHSOPT, 4168 const ObjCObjectPointerType *RHSOPT, 4169 llvm::SmallVectorImpl<ObjCProtocolDecl *> &IntersectionOfProtocols) { 4170 4171 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4172 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4173 4174 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> InheritedProtocolSet; 4175 unsigned LHSNumProtocols = LHS->getNumProtocols(); 4176 if (LHSNumProtocols > 0) 4177 InheritedProtocolSet.insert(LHS->qual_begin(), LHS->qual_end()); 4178 else { 4179 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 4180 Context.CollectInheritedProtocols(LHS->getDecl(), LHSInheritedProtocols); 4181 InheritedProtocolSet.insert(LHSInheritedProtocols.begin(), 4182 LHSInheritedProtocols.end()); 4183 } 4184 4185 unsigned RHSNumProtocols = RHS->getNumProtocols(); 4186 if (RHSNumProtocols > 0) { 4187 ObjCProtocolDecl **RHSProtocols = 4188 const_cast<ObjCProtocolDecl **>(RHS->qual_begin()); 4189 for (unsigned i = 0; i < RHSNumProtocols; ++i) 4190 if (InheritedProtocolSet.count(RHSProtocols[i])) 4191 IntersectionOfProtocols.push_back(RHSProtocols[i]); 4192 } 4193 else { 4194 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> RHSInheritedProtocols; 4195 Context.CollectInheritedProtocols(RHS->getDecl(), RHSInheritedProtocols); 4196 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 4197 RHSInheritedProtocols.begin(), 4198 E = RHSInheritedProtocols.end(); I != E; ++I) 4199 if (InheritedProtocolSet.count((*I))) 4200 IntersectionOfProtocols.push_back((*I)); 4201 } 4202} 4203 4204/// areCommonBaseCompatible - Returns common base class of the two classes if 4205/// one found. Note that this is O'2 algorithm. But it will be called as the 4206/// last type comparison in a ?-exp of ObjC pointer types before a 4207/// warning is issued. So, its invokation is extremely rare. 4208QualType ASTContext::areCommonBaseCompatible( 4209 const ObjCObjectPointerType *LHSOPT, 4210 const ObjCObjectPointerType *RHSOPT) { 4211 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4212 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4213 if (!LHS || !RHS) 4214 return QualType(); 4215 4216 while (const ObjCInterfaceDecl *LHSIDecl = LHS->getDecl()->getSuperClass()) { 4217 QualType LHSTy = getObjCInterfaceType(LHSIDecl); 4218 LHS = LHSTy->getAs<ObjCInterfaceType>(); 4219 if (canAssignObjCInterfaces(LHS, RHS)) { 4220 llvm::SmallVector<ObjCProtocolDecl *, 8> IntersectionOfProtocols; 4221 getIntersectionOfProtocols(*this, 4222 LHSOPT, RHSOPT, IntersectionOfProtocols); 4223 if (IntersectionOfProtocols.empty()) 4224 LHSTy = getObjCObjectPointerType(LHSTy); 4225 else 4226 LHSTy = getObjCObjectPointerType(LHSTy, &IntersectionOfProtocols[0], 4227 IntersectionOfProtocols.size()); 4228 return LHSTy; 4229 } 4230 } 4231 4232 return QualType(); 4233} 4234 4235bool ASTContext::canAssignObjCInterfaces(const ObjCInterfaceType *LHS, 4236 const ObjCInterfaceType *RHS) { 4237 // Verify that the base decls are compatible: the RHS must be a subclass of 4238 // the LHS. 4239 if (!LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 4240 return false; 4241 4242 // RHS must have a superset of the protocols in the LHS. If the LHS is not 4243 // protocol qualified at all, then we are good. 4244 if (LHS->getNumProtocols() == 0) 4245 return true; 4246 4247 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, then it 4248 // isn't a superset. 4249 if (RHS->getNumProtocols() == 0) 4250 return true; // FIXME: should return false! 4251 4252 for (ObjCInterfaceType::qual_iterator LHSPI = LHS->qual_begin(), 4253 LHSPE = LHS->qual_end(); 4254 LHSPI != LHSPE; LHSPI++) { 4255 bool RHSImplementsProtocol = false; 4256 4257 // If the RHS doesn't implement the protocol on the left, the types 4258 // are incompatible. 4259 for (ObjCInterfaceType::qual_iterator RHSPI = RHS->qual_begin(), 4260 RHSPE = RHS->qual_end(); 4261 RHSPI != RHSPE; RHSPI++) { 4262 if ((*RHSPI)->lookupProtocolNamed((*LHSPI)->getIdentifier())) { 4263 RHSImplementsProtocol = true; 4264 break; 4265 } 4266 } 4267 // FIXME: For better diagnostics, consider passing back the protocol name. 4268 if (!RHSImplementsProtocol) 4269 return false; 4270 } 4271 // The RHS implements all protocols listed on the LHS. 4272 return true; 4273} 4274 4275bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) { 4276 // get the "pointed to" types 4277 const ObjCObjectPointerType *LHSOPT = LHS->getAs<ObjCObjectPointerType>(); 4278 const ObjCObjectPointerType *RHSOPT = RHS->getAs<ObjCObjectPointerType>(); 4279 4280 if (!LHSOPT || !RHSOPT) 4281 return false; 4282 4283 return canAssignObjCInterfaces(LHSOPT, RHSOPT) || 4284 canAssignObjCInterfaces(RHSOPT, LHSOPT); 4285} 4286 4287/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible, 4288/// both shall have the identically qualified version of a compatible type. 4289/// C99 6.2.7p1: Two types have compatible types if their types are the 4290/// same. See 6.7.[2,3,5] for additional rules. 4291bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS) { 4292 if (getLangOptions().CPlusPlus) 4293 return hasSameType(LHS, RHS); 4294 4295 return !mergeTypes(LHS, RHS).isNull(); 4296} 4297 4298bool ASTContext::typesAreBlockPointerCompatible(QualType LHS, QualType RHS) { 4299 return !mergeTypes(LHS, RHS, true).isNull(); 4300} 4301 4302QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs, 4303 bool OfBlockPointer) { 4304 const FunctionType *lbase = lhs->getAs<FunctionType>(); 4305 const FunctionType *rbase = rhs->getAs<FunctionType>(); 4306 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 4307 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 4308 bool allLTypes = true; 4309 bool allRTypes = true; 4310 4311 // Check return type 4312 QualType retType; 4313 if (OfBlockPointer) 4314 retType = mergeTypes(rbase->getResultType(), lbase->getResultType(), true); 4315 else 4316 retType = mergeTypes(lbase->getResultType(), rbase->getResultType()); 4317 if (retType.isNull()) return QualType(); 4318 if (getCanonicalType(retType) != getCanonicalType(lbase->getResultType())) 4319 allLTypes = false; 4320 if (getCanonicalType(retType) != getCanonicalType(rbase->getResultType())) 4321 allRTypes = false; 4322 // FIXME: double check this 4323 // FIXME: should we error if lbase->getRegParmAttr() != 0 && 4324 // rbase->getRegParmAttr() != 0 && 4325 // lbase->getRegParmAttr() != rbase->getRegParmAttr()? 4326 FunctionType::ExtInfo lbaseInfo = lbase->getExtInfo(); 4327 FunctionType::ExtInfo rbaseInfo = rbase->getExtInfo(); 4328 unsigned RegParm = lbaseInfo.getRegParm() == 0 ? rbaseInfo.getRegParm() : 4329 lbaseInfo.getRegParm(); 4330 bool NoReturn = lbaseInfo.getNoReturn() || rbaseInfo.getNoReturn(); 4331 if (NoReturn != lbaseInfo.getNoReturn() || 4332 RegParm != lbaseInfo.getRegParm()) 4333 allLTypes = false; 4334 if (NoReturn != rbaseInfo.getNoReturn() || 4335 RegParm != rbaseInfo.getRegParm()) 4336 allRTypes = false; 4337 CallingConv lcc = lbaseInfo.getCC(); 4338 CallingConv rcc = rbaseInfo.getCC(); 4339 // Compatible functions must have compatible calling conventions 4340 if (!isSameCallConv(lcc, rcc)) 4341 return QualType(); 4342 4343 if (lproto && rproto) { // two C99 style function prototypes 4344 assert(!lproto->hasExceptionSpec() && !rproto->hasExceptionSpec() && 4345 "C++ shouldn't be here"); 4346 unsigned lproto_nargs = lproto->getNumArgs(); 4347 unsigned rproto_nargs = rproto->getNumArgs(); 4348 4349 // Compatible functions must have the same number of arguments 4350 if (lproto_nargs != rproto_nargs) 4351 return QualType(); 4352 4353 // Variadic and non-variadic functions aren't compatible 4354 if (lproto->isVariadic() != rproto->isVariadic()) 4355 return QualType(); 4356 4357 if (lproto->getTypeQuals() != rproto->getTypeQuals()) 4358 return QualType(); 4359 4360 // Check argument compatibility 4361 llvm::SmallVector<QualType, 10> types; 4362 for (unsigned i = 0; i < lproto_nargs; i++) { 4363 QualType largtype = lproto->getArgType(i).getUnqualifiedType(); 4364 QualType rargtype = rproto->getArgType(i).getUnqualifiedType(); 4365 QualType argtype = mergeTypes(largtype, rargtype, OfBlockPointer); 4366 if (argtype.isNull()) return QualType(); 4367 types.push_back(argtype); 4368 if (getCanonicalType(argtype) != getCanonicalType(largtype)) 4369 allLTypes = false; 4370 if (getCanonicalType(argtype) != getCanonicalType(rargtype)) 4371 allRTypes = false; 4372 } 4373 if (allLTypes) return lhs; 4374 if (allRTypes) return rhs; 4375 return getFunctionType(retType, types.begin(), types.size(), 4376 lproto->isVariadic(), lproto->getTypeQuals(), 4377 false, false, 0, 0, 4378 FunctionType::ExtInfo(NoReturn, RegParm, lcc)); 4379 } 4380 4381 if (lproto) allRTypes = false; 4382 if (rproto) allLTypes = false; 4383 4384 const FunctionProtoType *proto = lproto ? lproto : rproto; 4385 if (proto) { 4386 assert(!proto->hasExceptionSpec() && "C++ shouldn't be here"); 4387 if (proto->isVariadic()) return QualType(); 4388 // Check that the types are compatible with the types that 4389 // would result from default argument promotions (C99 6.7.5.3p15). 4390 // The only types actually affected are promotable integer 4391 // types and floats, which would be passed as a different 4392 // type depending on whether the prototype is visible. 4393 unsigned proto_nargs = proto->getNumArgs(); 4394 for (unsigned i = 0; i < proto_nargs; ++i) { 4395 QualType argTy = proto->getArgType(i); 4396 4397 // Look at the promotion type of enum types, since that is the type used 4398 // to pass enum values. 4399 if (const EnumType *Enum = argTy->getAs<EnumType>()) 4400 argTy = Enum->getDecl()->getPromotionType(); 4401 4402 if (argTy->isPromotableIntegerType() || 4403 getCanonicalType(argTy).getUnqualifiedType() == FloatTy) 4404 return QualType(); 4405 } 4406 4407 if (allLTypes) return lhs; 4408 if (allRTypes) return rhs; 4409 return getFunctionType(retType, proto->arg_type_begin(), 4410 proto->getNumArgs(), proto->isVariadic(), 4411 proto->getTypeQuals(), 4412 false, false, 0, 0, 4413 FunctionType::ExtInfo(NoReturn, RegParm, lcc)); 4414 } 4415 4416 if (allLTypes) return lhs; 4417 if (allRTypes) return rhs; 4418 FunctionType::ExtInfo Info(NoReturn, RegParm, lcc); 4419 return getFunctionNoProtoType(retType, Info); 4420} 4421 4422QualType ASTContext::mergeTypes(QualType LHS, QualType RHS, 4423 bool OfBlockPointer) { 4424 // C++ [expr]: If an expression initially has the type "reference to T", the 4425 // type is adjusted to "T" prior to any further analysis, the expression 4426 // designates the object or function denoted by the reference, and the 4427 // expression is an lvalue unless the reference is an rvalue reference and 4428 // the expression is a function call (possibly inside parentheses). 4429 assert(!LHS->getAs<ReferenceType>() && "LHS is a reference type?"); 4430 assert(!RHS->getAs<ReferenceType>() && "RHS is a reference type?"); 4431 4432 QualType LHSCan = getCanonicalType(LHS), 4433 RHSCan = getCanonicalType(RHS); 4434 4435 // If two types are identical, they are compatible. 4436 if (LHSCan == RHSCan) 4437 return LHS; 4438 4439 // If the qualifiers are different, the types aren't compatible... mostly. 4440 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 4441 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 4442 if (LQuals != RQuals) { 4443 // If any of these qualifiers are different, we have a type 4444 // mismatch. 4445 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 4446 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 4447 return QualType(); 4448 4449 // Exactly one GC qualifier difference is allowed: __strong is 4450 // okay if the other type has no GC qualifier but is an Objective 4451 // C object pointer (i.e. implicitly strong by default). We fix 4452 // this by pretending that the unqualified type was actually 4453 // qualified __strong. 4454 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 4455 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 4456 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 4457 4458 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 4459 return QualType(); 4460 4461 if (GC_L == Qualifiers::Strong && RHSCan->isObjCObjectPointerType()) { 4462 return mergeTypes(LHS, getObjCGCQualType(RHS, Qualifiers::Strong)); 4463 } 4464 if (GC_R == Qualifiers::Strong && LHSCan->isObjCObjectPointerType()) { 4465 return mergeTypes(getObjCGCQualType(LHS, Qualifiers::Strong), RHS); 4466 } 4467 return QualType(); 4468 } 4469 4470 // Okay, qualifiers are equal. 4471 4472 Type::TypeClass LHSClass = LHSCan->getTypeClass(); 4473 Type::TypeClass RHSClass = RHSCan->getTypeClass(); 4474 4475 // We want to consider the two function types to be the same for these 4476 // comparisons, just force one to the other. 4477 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto; 4478 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto; 4479 4480 // Same as above for arrays 4481 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray) 4482 LHSClass = Type::ConstantArray; 4483 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray) 4484 RHSClass = Type::ConstantArray; 4485 4486 // Canonicalize ExtVector -> Vector. 4487 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector; 4488 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector; 4489 4490 // If the canonical type classes don't match. 4491 if (LHSClass != RHSClass) { 4492 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char, 4493 // a signed integer type, or an unsigned integer type. 4494 // Compatibility is based on the underlying type, not the promotion 4495 // type. 4496 if (const EnumType* ETy = LHS->getAs<EnumType>()) { 4497 if (ETy->getDecl()->getIntegerType() == RHSCan.getUnqualifiedType()) 4498 return RHS; 4499 } 4500 if (const EnumType* ETy = RHS->getAs<EnumType>()) { 4501 if (ETy->getDecl()->getIntegerType() == LHSCan.getUnqualifiedType()) 4502 return LHS; 4503 } 4504 4505 return QualType(); 4506 } 4507 4508 // The canonical type classes match. 4509 switch (LHSClass) { 4510#define TYPE(Class, Base) 4511#define ABSTRACT_TYPE(Class, Base) 4512#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) case Type::Class: 4513#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 4514#define DEPENDENT_TYPE(Class, Base) case Type::Class: 4515#include "clang/AST/TypeNodes.def" 4516 assert(false && "Non-canonical and dependent types shouldn't get here"); 4517 return QualType(); 4518 4519 case Type::LValueReference: 4520 case Type::RValueReference: 4521 case Type::MemberPointer: 4522 assert(false && "C++ should never be in mergeTypes"); 4523 return QualType(); 4524 4525 case Type::IncompleteArray: 4526 case Type::VariableArray: 4527 case Type::FunctionProto: 4528 case Type::ExtVector: 4529 assert(false && "Types are eliminated above"); 4530 return QualType(); 4531 4532 case Type::Pointer: 4533 { 4534 // Merge two pointer types, while trying to preserve typedef info 4535 QualType LHSPointee = LHS->getAs<PointerType>()->getPointeeType(); 4536 QualType RHSPointee = RHS->getAs<PointerType>()->getPointeeType(); 4537 QualType ResultType = mergeTypes(LHSPointee, RHSPointee); 4538 if (ResultType.isNull()) return QualType(); 4539 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 4540 return LHS; 4541 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 4542 return RHS; 4543 return getPointerType(ResultType); 4544 } 4545 case Type::BlockPointer: 4546 { 4547 // Merge two block pointer types, while trying to preserve typedef info 4548 QualType LHSPointee = LHS->getAs<BlockPointerType>()->getPointeeType(); 4549 QualType RHSPointee = RHS->getAs<BlockPointerType>()->getPointeeType(); 4550 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, OfBlockPointer); 4551 if (ResultType.isNull()) return QualType(); 4552 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 4553 return LHS; 4554 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 4555 return RHS; 4556 return getBlockPointerType(ResultType); 4557 } 4558 case Type::ConstantArray: 4559 { 4560 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS); 4561 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS); 4562 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize()) 4563 return QualType(); 4564 4565 QualType LHSElem = getAsArrayType(LHS)->getElementType(); 4566 QualType RHSElem = getAsArrayType(RHS)->getElementType(); 4567 QualType ResultType = mergeTypes(LHSElem, RHSElem); 4568 if (ResultType.isNull()) return QualType(); 4569 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 4570 return LHS; 4571 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 4572 return RHS; 4573 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(), 4574 ArrayType::ArraySizeModifier(), 0); 4575 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(), 4576 ArrayType::ArraySizeModifier(), 0); 4577 const VariableArrayType* LVAT = getAsVariableArrayType(LHS); 4578 const VariableArrayType* RVAT = getAsVariableArrayType(RHS); 4579 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 4580 return LHS; 4581 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 4582 return RHS; 4583 if (LVAT) { 4584 // FIXME: This isn't correct! But tricky to implement because 4585 // the array's size has to be the size of LHS, but the type 4586 // has to be different. 4587 return LHS; 4588 } 4589 if (RVAT) { 4590 // FIXME: This isn't correct! But tricky to implement because 4591 // the array's size has to be the size of RHS, but the type 4592 // has to be different. 4593 return RHS; 4594 } 4595 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS; 4596 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS; 4597 return getIncompleteArrayType(ResultType, 4598 ArrayType::ArraySizeModifier(), 0); 4599 } 4600 case Type::FunctionNoProto: 4601 return mergeFunctionTypes(LHS, RHS, OfBlockPointer); 4602 case Type::Record: 4603 case Type::Enum: 4604 return QualType(); 4605 case Type::Builtin: 4606 // Only exactly equal builtin types are compatible, which is tested above. 4607 return QualType(); 4608 case Type::Complex: 4609 // Distinct complex types are incompatible. 4610 return QualType(); 4611 case Type::Vector: 4612 // FIXME: The merged type should be an ExtVector! 4613 if (areCompatVectorTypes(LHSCan->getAs<VectorType>(), 4614 RHSCan->getAs<VectorType>())) 4615 return LHS; 4616 return QualType(); 4617 case Type::ObjCInterface: { 4618 // Check if the interfaces are assignment compatible. 4619 // FIXME: This should be type compatibility, e.g. whether 4620 // "LHS x; RHS x;" at global scope is legal. 4621 const ObjCInterfaceType* LHSIface = LHS->getAs<ObjCInterfaceType>(); 4622 const ObjCInterfaceType* RHSIface = RHS->getAs<ObjCInterfaceType>(); 4623 if (LHSIface && RHSIface && 4624 canAssignObjCInterfaces(LHSIface, RHSIface)) 4625 return LHS; 4626 4627 return QualType(); 4628 } 4629 case Type::ObjCObjectPointer: { 4630 if (OfBlockPointer) { 4631 if (canAssignObjCInterfacesInBlockPointer( 4632 LHS->getAs<ObjCObjectPointerType>(), 4633 RHS->getAs<ObjCObjectPointerType>())) 4634 return LHS; 4635 return QualType(); 4636 } 4637 if (canAssignObjCInterfaces(LHS->getAs<ObjCObjectPointerType>(), 4638 RHS->getAs<ObjCObjectPointerType>())) 4639 return LHS; 4640 4641 return QualType(); 4642 } 4643 } 4644 4645 return QualType(); 4646} 4647 4648//===----------------------------------------------------------------------===// 4649// Integer Predicates 4650//===----------------------------------------------------------------------===// 4651 4652unsigned ASTContext::getIntWidth(QualType T) { 4653 if (T->isBooleanType()) 4654 return 1; 4655 if (EnumType *ET = dyn_cast<EnumType>(T)) 4656 T = ET->getDecl()->getIntegerType(); 4657 // For builtin types, just use the standard type sizing method 4658 return (unsigned)getTypeSize(T); 4659} 4660 4661QualType ASTContext::getCorrespondingUnsignedType(QualType T) { 4662 assert(T->isSignedIntegerType() && "Unexpected type"); 4663 4664 // Turn <4 x signed int> -> <4 x unsigned int> 4665 if (const VectorType *VTy = T->getAs<VectorType>()) 4666 return getVectorType(getCorrespondingUnsignedType(VTy->getElementType()), 4667 VTy->getNumElements(), VTy->isAltiVec(), VTy->isPixel()); 4668 4669 // For enums, we return the unsigned version of the base type. 4670 if (const EnumType *ETy = T->getAs<EnumType>()) 4671 T = ETy->getDecl()->getIntegerType(); 4672 4673 const BuiltinType *BTy = T->getAs<BuiltinType>(); 4674 assert(BTy && "Unexpected signed integer type"); 4675 switch (BTy->getKind()) { 4676 case BuiltinType::Char_S: 4677 case BuiltinType::SChar: 4678 return UnsignedCharTy; 4679 case BuiltinType::Short: 4680 return UnsignedShortTy; 4681 case BuiltinType::Int: 4682 return UnsignedIntTy; 4683 case BuiltinType::Long: 4684 return UnsignedLongTy; 4685 case BuiltinType::LongLong: 4686 return UnsignedLongLongTy; 4687 case BuiltinType::Int128: 4688 return UnsignedInt128Ty; 4689 default: 4690 assert(0 && "Unexpected signed integer type"); 4691 return QualType(); 4692 } 4693} 4694 4695ExternalASTSource::~ExternalASTSource() { } 4696 4697void ExternalASTSource::PrintStats() { } 4698 4699 4700//===----------------------------------------------------------------------===// 4701// Builtin Type Computation 4702//===----------------------------------------------------------------------===// 4703 4704/// DecodeTypeFromStr - This decodes one type descriptor from Str, advancing the 4705/// pointer over the consumed characters. This returns the resultant type. 4706static QualType DecodeTypeFromStr(const char *&Str, ASTContext &Context, 4707 ASTContext::GetBuiltinTypeError &Error, 4708 bool AllowTypeModifiers = true) { 4709 // Modifiers. 4710 int HowLong = 0; 4711 bool Signed = false, Unsigned = false; 4712 4713 // Read the modifiers first. 4714 bool Done = false; 4715 while (!Done) { 4716 switch (*Str++) { 4717 default: Done = true; --Str; break; 4718 case 'S': 4719 assert(!Unsigned && "Can't use both 'S' and 'U' modifiers!"); 4720 assert(!Signed && "Can't use 'S' modifier multiple times!"); 4721 Signed = true; 4722 break; 4723 case 'U': 4724 assert(!Signed && "Can't use both 'S' and 'U' modifiers!"); 4725 assert(!Unsigned && "Can't use 'S' modifier multiple times!"); 4726 Unsigned = true; 4727 break; 4728 case 'L': 4729 assert(HowLong <= 2 && "Can't have LLLL modifier"); 4730 ++HowLong; 4731 break; 4732 } 4733 } 4734 4735 QualType Type; 4736 4737 // Read the base type. 4738 switch (*Str++) { 4739 default: assert(0 && "Unknown builtin type letter!"); 4740 case 'v': 4741 assert(HowLong == 0 && !Signed && !Unsigned && 4742 "Bad modifiers used with 'v'!"); 4743 Type = Context.VoidTy; 4744 break; 4745 case 'f': 4746 assert(HowLong == 0 && !Signed && !Unsigned && 4747 "Bad modifiers used with 'f'!"); 4748 Type = Context.FloatTy; 4749 break; 4750 case 'd': 4751 assert(HowLong < 2 && !Signed && !Unsigned && 4752 "Bad modifiers used with 'd'!"); 4753 if (HowLong) 4754 Type = Context.LongDoubleTy; 4755 else 4756 Type = Context.DoubleTy; 4757 break; 4758 case 's': 4759 assert(HowLong == 0 && "Bad modifiers used with 's'!"); 4760 if (Unsigned) 4761 Type = Context.UnsignedShortTy; 4762 else 4763 Type = Context.ShortTy; 4764 break; 4765 case 'i': 4766 if (HowLong == 3) 4767 Type = Unsigned ? Context.UnsignedInt128Ty : Context.Int128Ty; 4768 else if (HowLong == 2) 4769 Type = Unsigned ? Context.UnsignedLongLongTy : Context.LongLongTy; 4770 else if (HowLong == 1) 4771 Type = Unsigned ? Context.UnsignedLongTy : Context.LongTy; 4772 else 4773 Type = Unsigned ? Context.UnsignedIntTy : Context.IntTy; 4774 break; 4775 case 'c': 4776 assert(HowLong == 0 && "Bad modifiers used with 'c'!"); 4777 if (Signed) 4778 Type = Context.SignedCharTy; 4779 else if (Unsigned) 4780 Type = Context.UnsignedCharTy; 4781 else 4782 Type = Context.CharTy; 4783 break; 4784 case 'b': // boolean 4785 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'b'!"); 4786 Type = Context.BoolTy; 4787 break; 4788 case 'z': // size_t. 4789 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'z'!"); 4790 Type = Context.getSizeType(); 4791 break; 4792 case 'F': 4793 Type = Context.getCFConstantStringType(); 4794 break; 4795 case 'a': 4796 Type = Context.getBuiltinVaListType(); 4797 assert(!Type.isNull() && "builtin va list type not initialized!"); 4798 break; 4799 case 'A': 4800 // This is a "reference" to a va_list; however, what exactly 4801 // this means depends on how va_list is defined. There are two 4802 // different kinds of va_list: ones passed by value, and ones 4803 // passed by reference. An example of a by-value va_list is 4804 // x86, where va_list is a char*. An example of by-ref va_list 4805 // is x86-64, where va_list is a __va_list_tag[1]. For x86, 4806 // we want this argument to be a char*&; for x86-64, we want 4807 // it to be a __va_list_tag*. 4808 Type = Context.getBuiltinVaListType(); 4809 assert(!Type.isNull() && "builtin va list type not initialized!"); 4810 if (Type->isArrayType()) { 4811 Type = Context.getArrayDecayedType(Type); 4812 } else { 4813 Type = Context.getLValueReferenceType(Type); 4814 } 4815 break; 4816 case 'V': { 4817 char *End; 4818 unsigned NumElements = strtoul(Str, &End, 10); 4819 assert(End != Str && "Missing vector size"); 4820 4821 Str = End; 4822 4823 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 4824 // FIXME: Don't know what to do about AltiVec. 4825 Type = Context.getVectorType(ElementType, NumElements, false, false); 4826 break; 4827 } 4828 case 'X': { 4829 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 4830 Type = Context.getComplexType(ElementType); 4831 break; 4832 } 4833 case 'P': 4834 Type = Context.getFILEType(); 4835 if (Type.isNull()) { 4836 Error = ASTContext::GE_Missing_stdio; 4837 return QualType(); 4838 } 4839 break; 4840 case 'J': 4841 if (Signed) 4842 Type = Context.getsigjmp_bufType(); 4843 else 4844 Type = Context.getjmp_bufType(); 4845 4846 if (Type.isNull()) { 4847 Error = ASTContext::GE_Missing_setjmp; 4848 return QualType(); 4849 } 4850 break; 4851 } 4852 4853 if (!AllowTypeModifiers) 4854 return Type; 4855 4856 Done = false; 4857 while (!Done) { 4858 switch (char c = *Str++) { 4859 default: Done = true; --Str; break; 4860 case '*': 4861 case '&': 4862 { 4863 // Both pointers and references can have their pointee types 4864 // qualified with an address space. 4865 char *End; 4866 unsigned AddrSpace = strtoul(Str, &End, 10); 4867 if (End != Str && AddrSpace != 0) { 4868 Type = Context.getAddrSpaceQualType(Type, AddrSpace); 4869 Str = End; 4870 } 4871 } 4872 if (c == '*') 4873 Type = Context.getPointerType(Type); 4874 else 4875 Type = Context.getLValueReferenceType(Type); 4876 break; 4877 // FIXME: There's no way to have a built-in with an rvalue ref arg. 4878 case 'C': 4879 Type = Type.withConst(); 4880 break; 4881 case 'D': 4882 Type = Context.getVolatileType(Type); 4883 break; 4884 } 4885 } 4886 4887 return Type; 4888} 4889 4890/// GetBuiltinType - Return the type for the specified builtin. 4891QualType ASTContext::GetBuiltinType(unsigned id, 4892 GetBuiltinTypeError &Error) { 4893 const char *TypeStr = BuiltinInfo.GetTypeString(id); 4894 4895 llvm::SmallVector<QualType, 8> ArgTypes; 4896 4897 Error = GE_None; 4898 QualType ResType = DecodeTypeFromStr(TypeStr, *this, Error); 4899 if (Error != GE_None) 4900 return QualType(); 4901 while (TypeStr[0] && TypeStr[0] != '.') { 4902 QualType Ty = DecodeTypeFromStr(TypeStr, *this, Error); 4903 if (Error != GE_None) 4904 return QualType(); 4905 4906 // Do array -> pointer decay. The builtin should use the decayed type. 4907 if (Ty->isArrayType()) 4908 Ty = getArrayDecayedType(Ty); 4909 4910 ArgTypes.push_back(Ty); 4911 } 4912 4913 assert((TypeStr[0] != '.' || TypeStr[1] == 0) && 4914 "'.' should only occur at end of builtin type list!"); 4915 4916 // handle untyped/variadic arguments "T c99Style();" or "T cppStyle(...);". 4917 if (ArgTypes.size() == 0 && TypeStr[0] == '.') 4918 return getFunctionNoProtoType(ResType); 4919 4920 // FIXME: Should we create noreturn types? 4921 return getFunctionType(ResType, ArgTypes.data(), ArgTypes.size(), 4922 TypeStr[0] == '.', 0, false, false, 0, 0, 4923 FunctionType::ExtInfo()); 4924} 4925 4926QualType 4927ASTContext::UsualArithmeticConversionsType(QualType lhs, QualType rhs) { 4928 // Perform the usual unary conversions. We do this early so that 4929 // integral promotions to "int" can allow us to exit early, in the 4930 // lhs == rhs check. Also, for conversion purposes, we ignore any 4931 // qualifiers. For example, "const float" and "float" are 4932 // equivalent. 4933 if (lhs->isPromotableIntegerType()) 4934 lhs = getPromotedIntegerType(lhs); 4935 else 4936 lhs = lhs.getUnqualifiedType(); 4937 if (rhs->isPromotableIntegerType()) 4938 rhs = getPromotedIntegerType(rhs); 4939 else 4940 rhs = rhs.getUnqualifiedType(); 4941 4942 // If both types are identical, no conversion is needed. 4943 if (lhs == rhs) 4944 return lhs; 4945 4946 // If either side is a non-arithmetic type (e.g. a pointer), we are done. 4947 // The caller can deal with this (e.g. pointer + int). 4948 if (!lhs->isArithmeticType() || !rhs->isArithmeticType()) 4949 return lhs; 4950 4951 // At this point, we have two different arithmetic types. 4952 4953 // Handle complex types first (C99 6.3.1.8p1). 4954 if (lhs->isComplexType() || rhs->isComplexType()) { 4955 // if we have an integer operand, the result is the complex type. 4956 if (rhs->isIntegerType() || rhs->isComplexIntegerType()) { 4957 // convert the rhs to the lhs complex type. 4958 return lhs; 4959 } 4960 if (lhs->isIntegerType() || lhs->isComplexIntegerType()) { 4961 // convert the lhs to the rhs complex type. 4962 return rhs; 4963 } 4964 // This handles complex/complex, complex/float, or float/complex. 4965 // When both operands are complex, the shorter operand is converted to the 4966 // type of the longer, and that is the type of the result. This corresponds 4967 // to what is done when combining two real floating-point operands. 4968 // The fun begins when size promotion occur across type domains. 4969 // From H&S 6.3.4: When one operand is complex and the other is a real 4970 // floating-point type, the less precise type is converted, within it's 4971 // real or complex domain, to the precision of the other type. For example, 4972 // when combining a "long double" with a "double _Complex", the 4973 // "double _Complex" is promoted to "long double _Complex". 4974 int result = getFloatingTypeOrder(lhs, rhs); 4975 4976 if (result > 0) { // The left side is bigger, convert rhs. 4977 rhs = getFloatingTypeOfSizeWithinDomain(lhs, rhs); 4978 } else if (result < 0) { // The right side is bigger, convert lhs. 4979 lhs = getFloatingTypeOfSizeWithinDomain(rhs, lhs); 4980 } 4981 // At this point, lhs and rhs have the same rank/size. Now, make sure the 4982 // domains match. This is a requirement for our implementation, C99 4983 // does not require this promotion. 4984 if (lhs != rhs) { // Domains don't match, we have complex/float mix. 4985 if (lhs->isRealFloatingType()) { // handle "double, _Complex double". 4986 return rhs; 4987 } else { // handle "_Complex double, double". 4988 return lhs; 4989 } 4990 } 4991 return lhs; // The domain/size match exactly. 4992 } 4993 // Now handle "real" floating types (i.e. float, double, long double). 4994 if (lhs->isRealFloatingType() || rhs->isRealFloatingType()) { 4995 // if we have an integer operand, the result is the real floating type. 4996 if (rhs->isIntegerType()) { 4997 // convert rhs to the lhs floating point type. 4998 return lhs; 4999 } 5000 if (rhs->isComplexIntegerType()) { 5001 // convert rhs to the complex floating point type. 5002 return getComplexType(lhs); 5003 } 5004 if (lhs->isIntegerType()) { 5005 // convert lhs to the rhs floating point type. 5006 return rhs; 5007 } 5008 if (lhs->isComplexIntegerType()) { 5009 // convert lhs to the complex floating point type. 5010 return getComplexType(rhs); 5011 } 5012 // We have two real floating types, float/complex combos were handled above. 5013 // Convert the smaller operand to the bigger result. 5014 int result = getFloatingTypeOrder(lhs, rhs); 5015 if (result > 0) // convert the rhs 5016 return lhs; 5017 assert(result < 0 && "illegal float comparison"); 5018 return rhs; // convert the lhs 5019 } 5020 if (lhs->isComplexIntegerType() || rhs->isComplexIntegerType()) { 5021 // Handle GCC complex int extension. 5022 const ComplexType *lhsComplexInt = lhs->getAsComplexIntegerType(); 5023 const ComplexType *rhsComplexInt = rhs->getAsComplexIntegerType(); 5024 5025 if (lhsComplexInt && rhsComplexInt) { 5026 if (getIntegerTypeOrder(lhsComplexInt->getElementType(), 5027 rhsComplexInt->getElementType()) >= 0) 5028 return lhs; // convert the rhs 5029 return rhs; 5030 } else if (lhsComplexInt && rhs->isIntegerType()) { 5031 // convert the rhs to the lhs complex type. 5032 return lhs; 5033 } else if (rhsComplexInt && lhs->isIntegerType()) { 5034 // convert the lhs to the rhs complex type. 5035 return rhs; 5036 } 5037 } 5038 // Finally, we have two differing integer types. 5039 // The rules for this case are in C99 6.3.1.8 5040 int compare = getIntegerTypeOrder(lhs, rhs); 5041 bool lhsSigned = lhs->isSignedIntegerType(), 5042 rhsSigned = rhs->isSignedIntegerType(); 5043 QualType destType; 5044 if (lhsSigned == rhsSigned) { 5045 // Same signedness; use the higher-ranked type 5046 destType = compare >= 0 ? lhs : rhs; 5047 } else if (compare != (lhsSigned ? 1 : -1)) { 5048 // The unsigned type has greater than or equal rank to the 5049 // signed type, so use the unsigned type 5050 destType = lhsSigned ? rhs : lhs; 5051 } else if (getIntWidth(lhs) != getIntWidth(rhs)) { 5052 // The two types are different widths; if we are here, that 5053 // means the signed type is larger than the unsigned type, so 5054 // use the signed type. 5055 destType = lhsSigned ? lhs : rhs; 5056 } else { 5057 // The signed type is higher-ranked than the unsigned type, 5058 // but isn't actually any bigger (like unsigned int and long 5059 // on most 32-bit systems). Use the unsigned type corresponding 5060 // to the signed type. 5061 destType = getCorrespondingUnsignedType(lhsSigned ? lhs : rhs); 5062 } 5063 return destType; 5064} 5065