ASTContext.cpp revision 205408
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 ObjCFastEnumerationStateTypeDecl(0), FILEDecl(0), jmp_bufDecl(0), 45 sigjmp_bufDecl(0), BlockDescriptorType(0), BlockDescriptorExtendedType(0), 46 SourceMgr(SM), LangOpts(LOpts), FreeMemory(FreeMem), Target(t), 47 Idents(idents), Selectors(sels), 48 BuiltinInfo(builtins), ExternalSource(0), PrintingPolicy(LOpts) { 49 ObjCIdRedefinitionType = QualType(); 50 ObjCClassRedefinitionType = QualType(); 51 ObjCSelRedefinitionType = QualType(); 52 if (size_reserve > 0) Types.reserve(size_reserve); 53 TUDecl = TranslationUnitDecl::Create(*this); 54 InitBuiltinTypes(); 55} 56 57ASTContext::~ASTContext() { 58 // Release the DenseMaps associated with DeclContext objects. 59 // FIXME: Is this the ideal solution? 60 ReleaseDeclContextMaps(); 61 62 // Release all of the memory associated with overridden C++ methods. 63 for (llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::iterator 64 OM = OverriddenMethods.begin(), OMEnd = OverriddenMethods.end(); 65 OM != OMEnd; ++OM) 66 OM->second.Destroy(); 67 68 if (FreeMemory) { 69 // Deallocate all the types. 70 while (!Types.empty()) { 71 Types.back()->Destroy(*this); 72 Types.pop_back(); 73 } 74 75 for (llvm::FoldingSet<ExtQuals>::iterator 76 I = ExtQualNodes.begin(), E = ExtQualNodes.end(); I != E; ) { 77 // Increment in loop to prevent using deallocated memory. 78 Deallocate(&*I++); 79 } 80 81 for (llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*>::iterator 82 I = ASTRecordLayouts.begin(), E = ASTRecordLayouts.end(); I != E; ) { 83 // Increment in loop to prevent using deallocated memory. 84 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 85 R->Destroy(*this); 86 } 87 88 for (llvm::DenseMap<const ObjCContainerDecl*, 89 const ASTRecordLayout*>::iterator 90 I = ObjCLayouts.begin(), E = ObjCLayouts.end(); I != E; ) { 91 // Increment in loop to prevent using deallocated memory. 92 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 93 R->Destroy(*this); 94 } 95 } 96 97 // Destroy nested-name-specifiers. 98 for (llvm::FoldingSet<NestedNameSpecifier>::iterator 99 NNS = NestedNameSpecifiers.begin(), 100 NNSEnd = NestedNameSpecifiers.end(); 101 NNS != NNSEnd; ) { 102 // Increment in loop to prevent using deallocated memory. 103 (*NNS++).Destroy(*this); 104 } 105 106 if (GlobalNestedNameSpecifier) 107 GlobalNestedNameSpecifier->Destroy(*this); 108 109 TUDecl->Destroy(*this); 110} 111 112void 113ASTContext::setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source) { 114 ExternalSource.reset(Source.take()); 115} 116 117void ASTContext::PrintStats() const { 118 fprintf(stderr, "*** AST Context Stats:\n"); 119 fprintf(stderr, " %d types total.\n", (int)Types.size()); 120 121 unsigned counts[] = { 122#define TYPE(Name, Parent) 0, 123#define ABSTRACT_TYPE(Name, Parent) 124#include "clang/AST/TypeNodes.def" 125 0 // Extra 126 }; 127 128 for (unsigned i = 0, e = Types.size(); i != e; ++i) { 129 Type *T = Types[i]; 130 counts[(unsigned)T->getTypeClass()]++; 131 } 132 133 unsigned Idx = 0; 134 unsigned TotalBytes = 0; 135#define TYPE(Name, Parent) \ 136 if (counts[Idx]) \ 137 fprintf(stderr, " %d %s types\n", (int)counts[Idx], #Name); \ 138 TotalBytes += counts[Idx] * sizeof(Name##Type); \ 139 ++Idx; 140#define ABSTRACT_TYPE(Name, Parent) 141#include "clang/AST/TypeNodes.def" 142 143 fprintf(stderr, "Total bytes = %d\n", int(TotalBytes)); 144 145 if (ExternalSource.get()) { 146 fprintf(stderr, "\n"); 147 ExternalSource->PrintStats(); 148 } 149} 150 151 152void ASTContext::InitBuiltinType(CanQualType &R, BuiltinType::Kind K) { 153 BuiltinType *Ty = new (*this, TypeAlignment) BuiltinType(K); 154 R = CanQualType::CreateUnsafe(QualType(Ty, 0)); 155 Types.push_back(Ty); 156} 157 158void ASTContext::InitBuiltinTypes() { 159 assert(VoidTy.isNull() && "Context reinitialized?"); 160 161 // C99 6.2.5p19. 162 InitBuiltinType(VoidTy, BuiltinType::Void); 163 164 // C99 6.2.5p2. 165 InitBuiltinType(BoolTy, BuiltinType::Bool); 166 // C99 6.2.5p3. 167 if (LangOpts.CharIsSigned) 168 InitBuiltinType(CharTy, BuiltinType::Char_S); 169 else 170 InitBuiltinType(CharTy, BuiltinType::Char_U); 171 // C99 6.2.5p4. 172 InitBuiltinType(SignedCharTy, BuiltinType::SChar); 173 InitBuiltinType(ShortTy, BuiltinType::Short); 174 InitBuiltinType(IntTy, BuiltinType::Int); 175 InitBuiltinType(LongTy, BuiltinType::Long); 176 InitBuiltinType(LongLongTy, BuiltinType::LongLong); 177 178 // C99 6.2.5p6. 179 InitBuiltinType(UnsignedCharTy, BuiltinType::UChar); 180 InitBuiltinType(UnsignedShortTy, BuiltinType::UShort); 181 InitBuiltinType(UnsignedIntTy, BuiltinType::UInt); 182 InitBuiltinType(UnsignedLongTy, BuiltinType::ULong); 183 InitBuiltinType(UnsignedLongLongTy, BuiltinType::ULongLong); 184 185 // C99 6.2.5p10. 186 InitBuiltinType(FloatTy, BuiltinType::Float); 187 InitBuiltinType(DoubleTy, BuiltinType::Double); 188 InitBuiltinType(LongDoubleTy, BuiltinType::LongDouble); 189 190 // GNU extension, 128-bit integers. 191 InitBuiltinType(Int128Ty, BuiltinType::Int128); 192 InitBuiltinType(UnsignedInt128Ty, BuiltinType::UInt128); 193 194 if (LangOpts.CPlusPlus) // C++ 3.9.1p5 195 InitBuiltinType(WCharTy, BuiltinType::WChar); 196 else // C99 197 WCharTy = getFromTargetType(Target.getWCharType()); 198 199 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 200 InitBuiltinType(Char16Ty, BuiltinType::Char16); 201 else // C99 202 Char16Ty = getFromTargetType(Target.getChar16Type()); 203 204 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 205 InitBuiltinType(Char32Ty, BuiltinType::Char32); 206 else // C99 207 Char32Ty = getFromTargetType(Target.getChar32Type()); 208 209 // Placeholder type for functions. 210 InitBuiltinType(OverloadTy, BuiltinType::Overload); 211 212 // Placeholder type for type-dependent expressions whose type is 213 // completely unknown. No code should ever check a type against 214 // DependentTy and users should never see it; however, it is here to 215 // help diagnose failures to properly check for type-dependent 216 // expressions. 217 InitBuiltinType(DependentTy, BuiltinType::Dependent); 218 219 // Placeholder type for C++0x auto declarations whose real type has 220 // not yet been deduced. 221 InitBuiltinType(UndeducedAutoTy, BuiltinType::UndeducedAuto); 222 223 // C99 6.2.5p11. 224 FloatComplexTy = getComplexType(FloatTy); 225 DoubleComplexTy = getComplexType(DoubleTy); 226 LongDoubleComplexTy = getComplexType(LongDoubleTy); 227 228 BuiltinVaListType = QualType(); 229 230 // "Builtin" typedefs set by Sema::ActOnTranslationUnitScope(). 231 ObjCIdTypedefType = QualType(); 232 ObjCClassTypedefType = QualType(); 233 ObjCSelTypedefType = QualType(); 234 235 // Builtin types for 'id', 'Class', and 'SEL'. 236 InitBuiltinType(ObjCBuiltinIdTy, BuiltinType::ObjCId); 237 InitBuiltinType(ObjCBuiltinClassTy, BuiltinType::ObjCClass); 238 InitBuiltinType(ObjCBuiltinSelTy, BuiltinType::ObjCSel); 239 240 ObjCConstantStringType = QualType(); 241 242 // void * type 243 VoidPtrTy = getPointerType(VoidTy); 244 245 // nullptr type (C++0x 2.14.7) 246 InitBuiltinType(NullPtrTy, BuiltinType::NullPtr); 247} 248 249MemberSpecializationInfo * 250ASTContext::getInstantiatedFromStaticDataMember(const VarDecl *Var) { 251 assert(Var->isStaticDataMember() && "Not a static data member"); 252 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *>::iterator Pos 253 = InstantiatedFromStaticDataMember.find(Var); 254 if (Pos == InstantiatedFromStaticDataMember.end()) 255 return 0; 256 257 return Pos->second; 258} 259 260void 261ASTContext::setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 262 TemplateSpecializationKind TSK) { 263 assert(Inst->isStaticDataMember() && "Not a static data member"); 264 assert(Tmpl->isStaticDataMember() && "Not a static data member"); 265 assert(!InstantiatedFromStaticDataMember[Inst] && 266 "Already noted what static data member was instantiated from"); 267 InstantiatedFromStaticDataMember[Inst] 268 = new (*this) MemberSpecializationInfo(Tmpl, TSK); 269} 270 271NamedDecl * 272ASTContext::getInstantiatedFromUsingDecl(UsingDecl *UUD) { 273 llvm::DenseMap<UsingDecl *, NamedDecl *>::const_iterator Pos 274 = InstantiatedFromUsingDecl.find(UUD); 275 if (Pos == InstantiatedFromUsingDecl.end()) 276 return 0; 277 278 return Pos->second; 279} 280 281void 282ASTContext::setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern) { 283 assert((isa<UsingDecl>(Pattern) || 284 isa<UnresolvedUsingValueDecl>(Pattern) || 285 isa<UnresolvedUsingTypenameDecl>(Pattern)) && 286 "pattern decl is not a using decl"); 287 assert(!InstantiatedFromUsingDecl[Inst] && "pattern already exists"); 288 InstantiatedFromUsingDecl[Inst] = Pattern; 289} 290 291UsingShadowDecl * 292ASTContext::getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst) { 293 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*>::const_iterator Pos 294 = InstantiatedFromUsingShadowDecl.find(Inst); 295 if (Pos == InstantiatedFromUsingShadowDecl.end()) 296 return 0; 297 298 return Pos->second; 299} 300 301void 302ASTContext::setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 303 UsingShadowDecl *Pattern) { 304 assert(!InstantiatedFromUsingShadowDecl[Inst] && "pattern already exists"); 305 InstantiatedFromUsingShadowDecl[Inst] = Pattern; 306} 307 308FieldDecl *ASTContext::getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field) { 309 llvm::DenseMap<FieldDecl *, FieldDecl *>::iterator Pos 310 = InstantiatedFromUnnamedFieldDecl.find(Field); 311 if (Pos == InstantiatedFromUnnamedFieldDecl.end()) 312 return 0; 313 314 return Pos->second; 315} 316 317void ASTContext::setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, 318 FieldDecl *Tmpl) { 319 assert(!Inst->getDeclName() && "Instantiated field decl is not unnamed"); 320 assert(!Tmpl->getDeclName() && "Template field decl is not unnamed"); 321 assert(!InstantiatedFromUnnamedFieldDecl[Inst] && 322 "Already noted what unnamed field was instantiated from"); 323 324 InstantiatedFromUnnamedFieldDecl[Inst] = Tmpl; 325} 326 327CXXMethodVector::iterator CXXMethodVector::begin() const { 328 if ((Storage & 0x01) == 0) 329 return reinterpret_cast<iterator>(&Storage); 330 331 vector_type *Vec = reinterpret_cast<vector_type *>(Storage & ~0x01); 332 return &Vec->front(); 333} 334 335CXXMethodVector::iterator CXXMethodVector::end() const { 336 if ((Storage & 0x01) == 0) { 337 if (Storage == 0) 338 return reinterpret_cast<iterator>(&Storage); 339 340 return reinterpret_cast<iterator>(&Storage) + 1; 341 } 342 343 vector_type *Vec = reinterpret_cast<vector_type *>(Storage & ~0x01); 344 return &Vec->front() + Vec->size(); 345} 346 347void CXXMethodVector::push_back(const CXXMethodDecl *Method) { 348 if (Storage == 0) { 349 // 0 -> 1 element. 350 Storage = reinterpret_cast<uintptr_t>(Method); 351 return; 352 } 353 354 vector_type *Vec; 355 if ((Storage & 0x01) == 0) { 356 // 1 -> 2 elements. Allocate a new vector and push the element into that 357 // vector. 358 Vec = new vector_type; 359 Vec->push_back(reinterpret_cast<const CXXMethodDecl *>(Storage)); 360 Storage = reinterpret_cast<uintptr_t>(Vec) | 0x01; 361 } else 362 Vec = reinterpret_cast<vector_type *>(Storage & ~0x01); 363 364 // Add the new method to the vector. 365 Vec->push_back(Method); 366} 367 368void CXXMethodVector::Destroy() { 369 if (Storage & 0x01) 370 delete reinterpret_cast<vector_type *>(Storage & ~0x01); 371 372 Storage = 0; 373} 374 375 376ASTContext::overridden_cxx_method_iterator 377ASTContext::overridden_methods_begin(const CXXMethodDecl *Method) const { 378 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 379 = OverriddenMethods.find(Method); 380 if (Pos == OverriddenMethods.end()) 381 return 0; 382 383 return Pos->second.begin(); 384} 385 386ASTContext::overridden_cxx_method_iterator 387ASTContext::overridden_methods_end(const CXXMethodDecl *Method) const { 388 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 389 = OverriddenMethods.find(Method); 390 if (Pos == OverriddenMethods.end()) 391 return 0; 392 393 return Pos->second.end(); 394} 395 396void ASTContext::addOverriddenMethod(const CXXMethodDecl *Method, 397 const CXXMethodDecl *Overridden) { 398 OverriddenMethods[Method].push_back(Overridden); 399} 400 401namespace { 402 class BeforeInTranslationUnit 403 : std::binary_function<SourceRange, SourceRange, bool> { 404 SourceManager *SourceMgr; 405 406 public: 407 explicit BeforeInTranslationUnit(SourceManager *SM) : SourceMgr(SM) { } 408 409 bool operator()(SourceRange X, SourceRange Y) { 410 return SourceMgr->isBeforeInTranslationUnit(X.getBegin(), Y.getBegin()); 411 } 412 }; 413} 414 415//===----------------------------------------------------------------------===// 416// Type Sizing and Analysis 417//===----------------------------------------------------------------------===// 418 419/// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 420/// scalar floating point type. 421const llvm::fltSemantics &ASTContext::getFloatTypeSemantics(QualType T) const { 422 const BuiltinType *BT = T->getAs<BuiltinType>(); 423 assert(BT && "Not a floating point type!"); 424 switch (BT->getKind()) { 425 default: assert(0 && "Not a floating point type!"); 426 case BuiltinType::Float: return Target.getFloatFormat(); 427 case BuiltinType::Double: return Target.getDoubleFormat(); 428 case BuiltinType::LongDouble: return Target.getLongDoubleFormat(); 429 } 430} 431 432/// getDeclAlign - Return a conservative estimate of the alignment of the 433/// specified decl. Note that bitfields do not have a valid alignment, so 434/// this method will assert on them. 435/// If @p RefAsPointee, references are treated like their underlying type 436/// (for alignof), else they're treated like pointers (for CodeGen). 437CharUnits ASTContext::getDeclAlign(const Decl *D, bool RefAsPointee) { 438 unsigned Align = Target.getCharWidth(); 439 440 if (const AlignedAttr* AA = D->getAttr<AlignedAttr>()) 441 Align = std::max(Align, AA->getMaxAlignment()); 442 443 if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) { 444 QualType T = VD->getType(); 445 if (const ReferenceType* RT = T->getAs<ReferenceType>()) { 446 if (RefAsPointee) 447 T = RT->getPointeeType(); 448 else 449 T = getPointerType(RT->getPointeeType()); 450 } 451 if (!T->isIncompleteType() && !T->isFunctionType()) { 452 // Incomplete or function types default to 1. 453 while (isa<VariableArrayType>(T) || isa<IncompleteArrayType>(T)) 454 T = cast<ArrayType>(T)->getElementType(); 455 456 Align = std::max(Align, getPreferredTypeAlign(T.getTypePtr())); 457 } 458 if (const FieldDecl *FD = dyn_cast<FieldDecl>(VD)) { 459 // In the case of a field in a packed struct, we want the minimum 460 // of the alignment of the field and the alignment of the struct. 461 Align = std::min(Align, 462 getPreferredTypeAlign(FD->getParent()->getTypeForDecl())); 463 } 464 } 465 466 return CharUnits::fromQuantity(Align / Target.getCharWidth()); 467} 468 469/// getTypeSize - Return the size of the specified type, in bits. This method 470/// does not work on incomplete types. 471/// 472/// FIXME: Pointers into different addr spaces could have different sizes and 473/// alignment requirements: getPointerInfo should take an AddrSpace, this 474/// should take a QualType, &c. 475std::pair<uint64_t, unsigned> 476ASTContext::getTypeInfo(const Type *T) { 477 uint64_t Width=0; 478 unsigned Align=8; 479 switch (T->getTypeClass()) { 480#define TYPE(Class, Base) 481#define ABSTRACT_TYPE(Class, Base) 482#define NON_CANONICAL_TYPE(Class, Base) 483#define DEPENDENT_TYPE(Class, Base) case Type::Class: 484#include "clang/AST/TypeNodes.def" 485 assert(false && "Should not see dependent types"); 486 break; 487 488 case Type::FunctionNoProto: 489 case Type::FunctionProto: 490 // GCC extension: alignof(function) = 32 bits 491 Width = 0; 492 Align = 32; 493 break; 494 495 case Type::IncompleteArray: 496 case Type::VariableArray: 497 Width = 0; 498 Align = getTypeAlign(cast<ArrayType>(T)->getElementType()); 499 break; 500 501 case Type::ConstantArray: { 502 const ConstantArrayType *CAT = cast<ConstantArrayType>(T); 503 504 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(CAT->getElementType()); 505 Width = EltInfo.first*CAT->getSize().getZExtValue(); 506 Align = EltInfo.second; 507 break; 508 } 509 case Type::ExtVector: 510 case Type::Vector: { 511 const VectorType *VT = cast<VectorType>(T); 512 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(VT->getElementType()); 513 Width = EltInfo.first*VT->getNumElements(); 514 Align = Width; 515 // If the alignment is not a power of 2, round up to the next power of 2. 516 // This happens for non-power-of-2 length vectors. 517 if (VT->getNumElements() & (VT->getNumElements()-1)) { 518 Align = llvm::NextPowerOf2(Align); 519 Width = llvm::RoundUpToAlignment(Width, Align); 520 } 521 break; 522 } 523 524 case Type::Builtin: 525 switch (cast<BuiltinType>(T)->getKind()) { 526 default: assert(0 && "Unknown builtin type!"); 527 case BuiltinType::Void: 528 // GCC extension: alignof(void) = 8 bits. 529 Width = 0; 530 Align = 8; 531 break; 532 533 case BuiltinType::Bool: 534 Width = Target.getBoolWidth(); 535 Align = Target.getBoolAlign(); 536 break; 537 case BuiltinType::Char_S: 538 case BuiltinType::Char_U: 539 case BuiltinType::UChar: 540 case BuiltinType::SChar: 541 Width = Target.getCharWidth(); 542 Align = Target.getCharAlign(); 543 break; 544 case BuiltinType::WChar: 545 Width = Target.getWCharWidth(); 546 Align = Target.getWCharAlign(); 547 break; 548 case BuiltinType::Char16: 549 Width = Target.getChar16Width(); 550 Align = Target.getChar16Align(); 551 break; 552 case BuiltinType::Char32: 553 Width = Target.getChar32Width(); 554 Align = Target.getChar32Align(); 555 break; 556 case BuiltinType::UShort: 557 case BuiltinType::Short: 558 Width = Target.getShortWidth(); 559 Align = Target.getShortAlign(); 560 break; 561 case BuiltinType::UInt: 562 case BuiltinType::Int: 563 Width = Target.getIntWidth(); 564 Align = Target.getIntAlign(); 565 break; 566 case BuiltinType::ULong: 567 case BuiltinType::Long: 568 Width = Target.getLongWidth(); 569 Align = Target.getLongAlign(); 570 break; 571 case BuiltinType::ULongLong: 572 case BuiltinType::LongLong: 573 Width = Target.getLongLongWidth(); 574 Align = Target.getLongLongAlign(); 575 break; 576 case BuiltinType::Int128: 577 case BuiltinType::UInt128: 578 Width = 128; 579 Align = 128; // int128_t is 128-bit aligned on all targets. 580 break; 581 case BuiltinType::Float: 582 Width = Target.getFloatWidth(); 583 Align = Target.getFloatAlign(); 584 break; 585 case BuiltinType::Double: 586 Width = Target.getDoubleWidth(); 587 Align = Target.getDoubleAlign(); 588 break; 589 case BuiltinType::LongDouble: 590 Width = Target.getLongDoubleWidth(); 591 Align = Target.getLongDoubleAlign(); 592 break; 593 case BuiltinType::NullPtr: 594 Width = Target.getPointerWidth(0); // C++ 3.9.1p11: sizeof(nullptr_t) 595 Align = Target.getPointerAlign(0); // == sizeof(void*) 596 break; 597 } 598 break; 599 case Type::ObjCObjectPointer: 600 Width = Target.getPointerWidth(0); 601 Align = Target.getPointerAlign(0); 602 break; 603 case Type::BlockPointer: { 604 unsigned AS = cast<BlockPointerType>(T)->getPointeeType().getAddressSpace(); 605 Width = Target.getPointerWidth(AS); 606 Align = Target.getPointerAlign(AS); 607 break; 608 } 609 case Type::LValueReference: 610 case Type::RValueReference: { 611 // alignof and sizeof should never enter this code path here, so we go 612 // the pointer route. 613 unsigned AS = cast<ReferenceType>(T)->getPointeeType().getAddressSpace(); 614 Width = Target.getPointerWidth(AS); 615 Align = Target.getPointerAlign(AS); 616 break; 617 } 618 case Type::Pointer: { 619 unsigned AS = cast<PointerType>(T)->getPointeeType().getAddressSpace(); 620 Width = Target.getPointerWidth(AS); 621 Align = Target.getPointerAlign(AS); 622 break; 623 } 624 case Type::MemberPointer: { 625 QualType Pointee = cast<MemberPointerType>(T)->getPointeeType(); 626 std::pair<uint64_t, unsigned> PtrDiffInfo = 627 getTypeInfo(getPointerDiffType()); 628 Width = PtrDiffInfo.first; 629 if (Pointee->isFunctionType()) 630 Width *= 2; 631 Align = PtrDiffInfo.second; 632 break; 633 } 634 case Type::Complex: { 635 // Complex types have the same alignment as their elements, but twice the 636 // size. 637 std::pair<uint64_t, unsigned> EltInfo = 638 getTypeInfo(cast<ComplexType>(T)->getElementType()); 639 Width = EltInfo.first*2; 640 Align = EltInfo.second; 641 break; 642 } 643 case Type::ObjCInterface: { 644 const ObjCInterfaceType *ObjCI = cast<ObjCInterfaceType>(T); 645 const ASTRecordLayout &Layout = getASTObjCInterfaceLayout(ObjCI->getDecl()); 646 Width = Layout.getSize(); 647 Align = Layout.getAlignment(); 648 break; 649 } 650 case Type::Record: 651 case Type::Enum: { 652 const TagType *TT = cast<TagType>(T); 653 654 if (TT->getDecl()->isInvalidDecl()) { 655 Width = 1; 656 Align = 1; 657 break; 658 } 659 660 if (const EnumType *ET = dyn_cast<EnumType>(TT)) 661 return getTypeInfo(ET->getDecl()->getIntegerType()); 662 663 const RecordType *RT = cast<RecordType>(TT); 664 const ASTRecordLayout &Layout = getASTRecordLayout(RT->getDecl()); 665 Width = Layout.getSize(); 666 Align = Layout.getAlignment(); 667 break; 668 } 669 670 case Type::SubstTemplateTypeParm: 671 return getTypeInfo(cast<SubstTemplateTypeParmType>(T)-> 672 getReplacementType().getTypePtr()); 673 674 case Type::Elaborated: 675 return getTypeInfo(cast<ElaboratedType>(T)->getUnderlyingType() 676 .getTypePtr()); 677 678 case Type::Typedef: { 679 const TypedefDecl *Typedef = cast<TypedefType>(T)->getDecl(); 680 if (const AlignedAttr *Aligned = Typedef->getAttr<AlignedAttr>()) { 681 Align = std::max(Aligned->getMaxAlignment(), 682 getTypeAlign(Typedef->getUnderlyingType().getTypePtr())); 683 Width = getTypeSize(Typedef->getUnderlyingType().getTypePtr()); 684 } else 685 return getTypeInfo(Typedef->getUnderlyingType().getTypePtr()); 686 break; 687 } 688 689 case Type::TypeOfExpr: 690 return getTypeInfo(cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType() 691 .getTypePtr()); 692 693 case Type::TypeOf: 694 return getTypeInfo(cast<TypeOfType>(T)->getUnderlyingType().getTypePtr()); 695 696 case Type::Decltype: 697 return getTypeInfo(cast<DecltypeType>(T)->getUnderlyingExpr()->getType() 698 .getTypePtr()); 699 700 case Type::QualifiedName: 701 return getTypeInfo(cast<QualifiedNameType>(T)->getNamedType().getTypePtr()); 702 703 case Type::InjectedClassName: 704 return getTypeInfo(cast<InjectedClassNameType>(T) 705 ->getUnderlyingType().getTypePtr()); 706 707 case Type::TemplateSpecialization: 708 assert(getCanonicalType(T) != T && 709 "Cannot request the size of a dependent type"); 710 // FIXME: this is likely to be wrong once we support template 711 // aliases, since a template alias could refer to a typedef that 712 // has an __aligned__ attribute on it. 713 return getTypeInfo(getCanonicalType(T)); 714 } 715 716 assert(Align && (Align & (Align-1)) == 0 && "Alignment must be power of 2"); 717 return std::make_pair(Width, Align); 718} 719 720/// getTypeSizeInChars - Return the size of the specified type, in characters. 721/// This method does not work on incomplete types. 722CharUnits ASTContext::getTypeSizeInChars(QualType T) { 723 return CharUnits::fromQuantity(getTypeSize(T) / getCharWidth()); 724} 725CharUnits ASTContext::getTypeSizeInChars(const Type *T) { 726 return CharUnits::fromQuantity(getTypeSize(T) / getCharWidth()); 727} 728 729/// getTypeAlignInChars - Return the ABI-specified alignment of a type, in 730/// characters. This method does not work on incomplete types. 731CharUnits ASTContext::getTypeAlignInChars(QualType T) { 732 return CharUnits::fromQuantity(getTypeAlign(T) / getCharWidth()); 733} 734CharUnits ASTContext::getTypeAlignInChars(const Type *T) { 735 return CharUnits::fromQuantity(getTypeAlign(T) / getCharWidth()); 736} 737 738/// getPreferredTypeAlign - Return the "preferred" alignment of the specified 739/// type for the current target in bits. This can be different than the ABI 740/// alignment in cases where it is beneficial for performance to overalign 741/// a data type. 742unsigned ASTContext::getPreferredTypeAlign(const Type *T) { 743 unsigned ABIAlign = getTypeAlign(T); 744 745 // Double and long long should be naturally aligned if possible. 746 if (const ComplexType* CT = T->getAs<ComplexType>()) 747 T = CT->getElementType().getTypePtr(); 748 if (T->isSpecificBuiltinType(BuiltinType::Double) || 749 T->isSpecificBuiltinType(BuiltinType::LongLong)) 750 return std::max(ABIAlign, (unsigned)getTypeSize(T)); 751 752 return ABIAlign; 753} 754 755static void CollectLocalObjCIvars(ASTContext *Ctx, 756 const ObjCInterfaceDecl *OI, 757 llvm::SmallVectorImpl<FieldDecl*> &Fields) { 758 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 759 E = OI->ivar_end(); I != E; ++I) { 760 ObjCIvarDecl *IVDecl = *I; 761 if (!IVDecl->isInvalidDecl()) 762 Fields.push_back(cast<FieldDecl>(IVDecl)); 763 } 764} 765 766void ASTContext::CollectObjCIvars(const ObjCInterfaceDecl *OI, 767 llvm::SmallVectorImpl<FieldDecl*> &Fields) { 768 if (const ObjCInterfaceDecl *SuperClass = OI->getSuperClass()) 769 CollectObjCIvars(SuperClass, Fields); 770 CollectLocalObjCIvars(this, OI, Fields); 771} 772 773/// ShallowCollectObjCIvars - 774/// Collect all ivars, including those synthesized, in the current class. 775/// 776void ASTContext::ShallowCollectObjCIvars(const ObjCInterfaceDecl *OI, 777 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 778 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 779 E = OI->ivar_end(); I != E; ++I) { 780 Ivars.push_back(*I); 781 } 782 783 CollectNonClassIvars(OI, Ivars); 784} 785 786/// CollectNonClassIvars - 787/// This routine collects all other ivars which are not declared in the class. 788/// This includes synthesized ivars (via @synthesize) and those in 789// class's @implementation. 790/// 791void ASTContext::CollectNonClassIvars(const ObjCInterfaceDecl *OI, 792 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 793 // Find ivars declared in class extension. 794 if (const ObjCCategoryDecl *CDecl = OI->getClassExtension()) { 795 for (ObjCCategoryDecl::ivar_iterator I = CDecl->ivar_begin(), 796 E = CDecl->ivar_end(); I != E; ++I) { 797 Ivars.push_back(*I); 798 } 799 } 800 801 // Also add any ivar defined in this class's implementation. This 802 // includes synthesized ivars. 803 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) { 804 for (ObjCImplementationDecl::ivar_iterator I = ImplDecl->ivar_begin(), 805 E = ImplDecl->ivar_end(); I != E; ++I) 806 Ivars.push_back(*I); 807 } 808} 809 810/// CollectInheritedProtocols - Collect all protocols in current class and 811/// those inherited by it. 812void ASTContext::CollectInheritedProtocols(const Decl *CDecl, 813 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols) { 814 if (const ObjCInterfaceDecl *OI = dyn_cast<ObjCInterfaceDecl>(CDecl)) { 815 for (ObjCInterfaceDecl::protocol_iterator P = OI->protocol_begin(), 816 PE = OI->protocol_end(); P != PE; ++P) { 817 ObjCProtocolDecl *Proto = (*P); 818 Protocols.insert(Proto); 819 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 820 PE = Proto->protocol_end(); P != PE; ++P) { 821 Protocols.insert(*P); 822 CollectInheritedProtocols(*P, Protocols); 823 } 824 } 825 826 // Categories of this Interface. 827 for (const ObjCCategoryDecl *CDeclChain = OI->getCategoryList(); 828 CDeclChain; CDeclChain = CDeclChain->getNextClassCategory()) 829 CollectInheritedProtocols(CDeclChain, Protocols); 830 if (ObjCInterfaceDecl *SD = OI->getSuperClass()) 831 while (SD) { 832 CollectInheritedProtocols(SD, Protocols); 833 SD = SD->getSuperClass(); 834 } 835 return; 836 } 837 if (const ObjCCategoryDecl *OC = dyn_cast<ObjCCategoryDecl>(CDecl)) { 838 for (ObjCInterfaceDecl::protocol_iterator P = OC->protocol_begin(), 839 PE = OC->protocol_end(); P != PE; ++P) { 840 ObjCProtocolDecl *Proto = (*P); 841 Protocols.insert(Proto); 842 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 843 PE = Proto->protocol_end(); P != PE; ++P) 844 CollectInheritedProtocols(*P, Protocols); 845 } 846 return; 847 } 848 if (const ObjCProtocolDecl *OP = dyn_cast<ObjCProtocolDecl>(CDecl)) { 849 for (ObjCProtocolDecl::protocol_iterator P = OP->protocol_begin(), 850 PE = OP->protocol_end(); P != PE; ++P) { 851 ObjCProtocolDecl *Proto = (*P); 852 Protocols.insert(Proto); 853 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 854 PE = Proto->protocol_end(); P != PE; ++P) 855 CollectInheritedProtocols(*P, Protocols); 856 } 857 return; 858 } 859} 860 861unsigned ASTContext::CountProtocolSynthesizedIvars(const ObjCProtocolDecl *PD) { 862 unsigned count = 0; 863 for (ObjCContainerDecl::prop_iterator I = PD->prop_begin(), 864 E = PD->prop_end(); I != E; ++I) 865 if ((*I)->getPropertyIvarDecl()) 866 ++count; 867 868 // Also look into nested protocols. 869 for (ObjCProtocolDecl::protocol_iterator P = PD->protocol_begin(), 870 E = PD->protocol_end(); P != E; ++P) 871 count += CountProtocolSynthesizedIvars(*P); 872 return count; 873} 874 875unsigned ASTContext::CountSynthesizedIvars(const ObjCInterfaceDecl *OI) { 876 unsigned count = 0; 877 for (ObjCInterfaceDecl::prop_iterator I = OI->prop_begin(), 878 E = OI->prop_end(); I != E; ++I) { 879 if ((*I)->getPropertyIvarDecl()) 880 ++count; 881 } 882 // Also look into interface's protocol list for properties declared 883 // in the protocol and whose ivars are synthesized. 884 for (ObjCInterfaceDecl::protocol_iterator P = OI->protocol_begin(), 885 PE = OI->protocol_end(); P != PE; ++P) { 886 ObjCProtocolDecl *PD = (*P); 887 count += CountProtocolSynthesizedIvars(PD); 888 } 889 return count; 890} 891 892/// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 893ObjCImplementationDecl *ASTContext::getObjCImplementation(ObjCInterfaceDecl *D) { 894 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 895 I = ObjCImpls.find(D); 896 if (I != ObjCImpls.end()) 897 return cast<ObjCImplementationDecl>(I->second); 898 return 0; 899} 900/// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 901ObjCCategoryImplDecl *ASTContext::getObjCImplementation(ObjCCategoryDecl *D) { 902 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 903 I = ObjCImpls.find(D); 904 if (I != ObjCImpls.end()) 905 return cast<ObjCCategoryImplDecl>(I->second); 906 return 0; 907} 908 909/// \brief Set the implementation of ObjCInterfaceDecl. 910void ASTContext::setObjCImplementation(ObjCInterfaceDecl *IFaceD, 911 ObjCImplementationDecl *ImplD) { 912 assert(IFaceD && ImplD && "Passed null params"); 913 ObjCImpls[IFaceD] = ImplD; 914} 915/// \brief Set the implementation of ObjCCategoryDecl. 916void ASTContext::setObjCImplementation(ObjCCategoryDecl *CatD, 917 ObjCCategoryImplDecl *ImplD) { 918 assert(CatD && ImplD && "Passed null params"); 919 ObjCImpls[CatD] = ImplD; 920} 921 922/// \brief Allocate an uninitialized TypeSourceInfo. 923/// 924/// The caller should initialize the memory held by TypeSourceInfo using 925/// the TypeLoc wrappers. 926/// 927/// \param T the type that will be the basis for type source info. This type 928/// should refer to how the declarator was written in source code, not to 929/// what type semantic analysis resolved the declarator to. 930TypeSourceInfo *ASTContext::CreateTypeSourceInfo(QualType T, 931 unsigned DataSize) { 932 if (!DataSize) 933 DataSize = TypeLoc::getFullDataSizeForType(T); 934 else 935 assert(DataSize == TypeLoc::getFullDataSizeForType(T) && 936 "incorrect data size provided to CreateTypeSourceInfo!"); 937 938 TypeSourceInfo *TInfo = 939 (TypeSourceInfo*)BumpAlloc.Allocate(sizeof(TypeSourceInfo) + DataSize, 8); 940 new (TInfo) TypeSourceInfo(T); 941 return TInfo; 942} 943 944TypeSourceInfo *ASTContext::getTrivialTypeSourceInfo(QualType T, 945 SourceLocation L) { 946 TypeSourceInfo *DI = CreateTypeSourceInfo(T); 947 DI->getTypeLoc().initialize(L); 948 return DI; 949} 950 951/// getInterfaceLayoutImpl - Get or compute information about the 952/// layout of the given interface. 953/// 954/// \param Impl - If given, also include the layout of the interface's 955/// implementation. This may differ by including synthesized ivars. 956const ASTRecordLayout & 957ASTContext::getObjCLayout(const ObjCInterfaceDecl *D, 958 const ObjCImplementationDecl *Impl) { 959 assert(!D->isForwardDecl() && "Invalid interface decl!"); 960 961 // Look up this layout, if already laid out, return what we have. 962 ObjCContainerDecl *Key = 963 Impl ? (ObjCContainerDecl*) Impl : (ObjCContainerDecl*) D; 964 if (const ASTRecordLayout *Entry = ObjCLayouts[Key]) 965 return *Entry; 966 967 // Add in synthesized ivar count if laying out an implementation. 968 if (Impl) { 969 unsigned SynthCount = CountSynthesizedIvars(D); 970 // If there aren't any sythesized ivars then reuse the interface 971 // entry. Note we can't cache this because we simply free all 972 // entries later; however we shouldn't look up implementations 973 // frequently. 974 if (SynthCount == 0) 975 return getObjCLayout(D, 0); 976 } 977 978 const ASTRecordLayout *NewEntry = 979 ASTRecordLayoutBuilder::ComputeLayout(*this, D, Impl); 980 ObjCLayouts[Key] = NewEntry; 981 982 return *NewEntry; 983} 984 985const ASTRecordLayout & 986ASTContext::getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) { 987 return getObjCLayout(D, 0); 988} 989 990const ASTRecordLayout & 991ASTContext::getASTObjCImplementationLayout(const ObjCImplementationDecl *D) { 992 return getObjCLayout(D->getClassInterface(), D); 993} 994 995/// getASTRecordLayout - Get or compute information about the layout of the 996/// specified record (struct/union/class), which indicates its size and field 997/// position information. 998const ASTRecordLayout &ASTContext::getASTRecordLayout(const RecordDecl *D) { 999 D = D->getDefinition(); 1000 assert(D && "Cannot get layout of forward declarations!"); 1001 1002 // Look up this layout, if already laid out, return what we have. 1003 // Note that we can't save a reference to the entry because this function 1004 // is recursive. 1005 const ASTRecordLayout *Entry = ASTRecordLayouts[D]; 1006 if (Entry) return *Entry; 1007 1008 const ASTRecordLayout *NewEntry = 1009 ASTRecordLayoutBuilder::ComputeLayout(*this, D); 1010 ASTRecordLayouts[D] = NewEntry; 1011 1012 return *NewEntry; 1013} 1014 1015const CXXMethodDecl *ASTContext::getKeyFunction(const CXXRecordDecl *RD) { 1016 RD = cast<CXXRecordDecl>(RD->getDefinition()); 1017 assert(RD && "Cannot get key function for forward declarations!"); 1018 1019 const CXXMethodDecl *&Entry = KeyFunctions[RD]; 1020 if (!Entry) 1021 Entry = ASTRecordLayoutBuilder::ComputeKeyFunction(RD); 1022 else 1023 assert(Entry == ASTRecordLayoutBuilder::ComputeKeyFunction(RD) && 1024 "Key function changed!"); 1025 1026 return Entry; 1027} 1028 1029//===----------------------------------------------------------------------===// 1030// Type creation/memoization methods 1031//===----------------------------------------------------------------------===// 1032 1033QualType ASTContext::getExtQualType(const Type *TypeNode, Qualifiers Quals) { 1034 unsigned Fast = Quals.getFastQualifiers(); 1035 Quals.removeFastQualifiers(); 1036 1037 // Check if we've already instantiated this type. 1038 llvm::FoldingSetNodeID ID; 1039 ExtQuals::Profile(ID, TypeNode, Quals); 1040 void *InsertPos = 0; 1041 if (ExtQuals *EQ = ExtQualNodes.FindNodeOrInsertPos(ID, InsertPos)) { 1042 assert(EQ->getQualifiers() == Quals); 1043 QualType T = QualType(EQ, Fast); 1044 return T; 1045 } 1046 1047 ExtQuals *New = new (*this, TypeAlignment) ExtQuals(*this, TypeNode, Quals); 1048 ExtQualNodes.InsertNode(New, InsertPos); 1049 QualType T = QualType(New, Fast); 1050 return T; 1051} 1052 1053QualType ASTContext::getVolatileType(QualType T) { 1054 QualType CanT = getCanonicalType(T); 1055 if (CanT.isVolatileQualified()) return T; 1056 1057 QualifierCollector Quals; 1058 const Type *TypeNode = Quals.strip(T); 1059 Quals.addVolatile(); 1060 1061 return getExtQualType(TypeNode, Quals); 1062} 1063 1064QualType ASTContext::getAddrSpaceQualType(QualType T, unsigned AddressSpace) { 1065 QualType CanT = getCanonicalType(T); 1066 if (CanT.getAddressSpace() == AddressSpace) 1067 return T; 1068 1069 // If we are composing extended qualifiers together, merge together 1070 // into one ExtQuals node. 1071 QualifierCollector Quals; 1072 const Type *TypeNode = Quals.strip(T); 1073 1074 // If this type already has an address space specified, it cannot get 1075 // another one. 1076 assert(!Quals.hasAddressSpace() && 1077 "Type cannot be in multiple addr spaces!"); 1078 Quals.addAddressSpace(AddressSpace); 1079 1080 return getExtQualType(TypeNode, Quals); 1081} 1082 1083QualType ASTContext::getObjCGCQualType(QualType T, 1084 Qualifiers::GC GCAttr) { 1085 QualType CanT = getCanonicalType(T); 1086 if (CanT.getObjCGCAttr() == GCAttr) 1087 return T; 1088 1089 if (T->isPointerType()) { 1090 QualType Pointee = T->getAs<PointerType>()->getPointeeType(); 1091 if (Pointee->isAnyPointerType()) { 1092 QualType ResultType = getObjCGCQualType(Pointee, GCAttr); 1093 return getPointerType(ResultType); 1094 } 1095 } 1096 1097 // If we are composing extended qualifiers together, merge together 1098 // into one ExtQuals node. 1099 QualifierCollector Quals; 1100 const Type *TypeNode = Quals.strip(T); 1101 1102 // If this type already has an ObjCGC specified, it cannot get 1103 // another one. 1104 assert(!Quals.hasObjCGCAttr() && 1105 "Type cannot have multiple ObjCGCs!"); 1106 Quals.addObjCGCAttr(GCAttr); 1107 1108 return getExtQualType(TypeNode, Quals); 1109} 1110 1111static QualType getNoReturnCallConvType(ASTContext& Context, QualType T, 1112 bool AddNoReturn, 1113 CallingConv CallConv) { 1114 QualType ResultType; 1115 if (const PointerType *Pointer = T->getAs<PointerType>()) { 1116 QualType Pointee = Pointer->getPointeeType(); 1117 ResultType = getNoReturnCallConvType(Context, Pointee, AddNoReturn, 1118 CallConv); 1119 if (ResultType == Pointee) 1120 return T; 1121 1122 ResultType = Context.getPointerType(ResultType); 1123 } else if (const BlockPointerType *BlockPointer 1124 = T->getAs<BlockPointerType>()) { 1125 QualType Pointee = BlockPointer->getPointeeType(); 1126 ResultType = getNoReturnCallConvType(Context, Pointee, AddNoReturn, 1127 CallConv); 1128 if (ResultType == Pointee) 1129 return T; 1130 1131 ResultType = Context.getBlockPointerType(ResultType); 1132 } else if (const FunctionType *F = T->getAs<FunctionType>()) { 1133 if (F->getNoReturnAttr() == AddNoReturn && F->getCallConv() == CallConv) 1134 return T; 1135 1136 if (const FunctionNoProtoType *FNPT = dyn_cast<FunctionNoProtoType>(F)) { 1137 ResultType = Context.getFunctionNoProtoType(FNPT->getResultType(), 1138 AddNoReturn, CallConv); 1139 } else { 1140 const FunctionProtoType *FPT = cast<FunctionProtoType>(F); 1141 ResultType 1142 = Context.getFunctionType(FPT->getResultType(), FPT->arg_type_begin(), 1143 FPT->getNumArgs(), FPT->isVariadic(), 1144 FPT->getTypeQuals(), 1145 FPT->hasExceptionSpec(), 1146 FPT->hasAnyExceptionSpec(), 1147 FPT->getNumExceptions(), 1148 FPT->exception_begin(), 1149 AddNoReturn, CallConv); 1150 } 1151 } else 1152 return T; 1153 1154 return Context.getQualifiedType(ResultType, T.getLocalQualifiers()); 1155} 1156 1157QualType ASTContext::getNoReturnType(QualType T, bool AddNoReturn) { 1158 return getNoReturnCallConvType(*this, T, AddNoReturn, T.getCallConv()); 1159} 1160 1161QualType ASTContext::getCallConvType(QualType T, CallingConv CallConv) { 1162 return getNoReturnCallConvType(*this, T, T.getNoReturnAttr(), CallConv); 1163} 1164 1165/// getComplexType - Return the uniqued reference to the type for a complex 1166/// number with the specified element type. 1167QualType ASTContext::getComplexType(QualType T) { 1168 // Unique pointers, to guarantee there is only one pointer of a particular 1169 // structure. 1170 llvm::FoldingSetNodeID ID; 1171 ComplexType::Profile(ID, T); 1172 1173 void *InsertPos = 0; 1174 if (ComplexType *CT = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos)) 1175 return QualType(CT, 0); 1176 1177 // If the pointee type isn't canonical, this won't be a canonical type either, 1178 // so fill in the canonical type field. 1179 QualType Canonical; 1180 if (!T.isCanonical()) { 1181 Canonical = getComplexType(getCanonicalType(T)); 1182 1183 // Get the new insert position for the node we care about. 1184 ComplexType *NewIP = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos); 1185 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1186 } 1187 ComplexType *New = new (*this, TypeAlignment) ComplexType(T, Canonical); 1188 Types.push_back(New); 1189 ComplexTypes.InsertNode(New, InsertPos); 1190 return QualType(New, 0); 1191} 1192 1193/// getPointerType - Return the uniqued reference to the type for a pointer to 1194/// the specified type. 1195QualType ASTContext::getPointerType(QualType T) { 1196 // Unique pointers, to guarantee there is only one pointer of a particular 1197 // structure. 1198 llvm::FoldingSetNodeID ID; 1199 PointerType::Profile(ID, T); 1200 1201 void *InsertPos = 0; 1202 if (PointerType *PT = PointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1203 return QualType(PT, 0); 1204 1205 // If the pointee type isn't canonical, this won't be a canonical type either, 1206 // so fill in the canonical type field. 1207 QualType Canonical; 1208 if (!T.isCanonical()) { 1209 Canonical = getPointerType(getCanonicalType(T)); 1210 1211 // Get the new insert position for the node we care about. 1212 PointerType *NewIP = PointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1213 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1214 } 1215 PointerType *New = new (*this, TypeAlignment) PointerType(T, Canonical); 1216 Types.push_back(New); 1217 PointerTypes.InsertNode(New, InsertPos); 1218 return QualType(New, 0); 1219} 1220 1221/// getBlockPointerType - Return the uniqued reference to the type for 1222/// a pointer to the specified block. 1223QualType ASTContext::getBlockPointerType(QualType T) { 1224 assert(T->isFunctionType() && "block of function types only"); 1225 // Unique pointers, to guarantee there is only one block of a particular 1226 // structure. 1227 llvm::FoldingSetNodeID ID; 1228 BlockPointerType::Profile(ID, T); 1229 1230 void *InsertPos = 0; 1231 if (BlockPointerType *PT = 1232 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1233 return QualType(PT, 0); 1234 1235 // If the block pointee type isn't canonical, this won't be a canonical 1236 // type either so fill in the canonical type field. 1237 QualType Canonical; 1238 if (!T.isCanonical()) { 1239 Canonical = getBlockPointerType(getCanonicalType(T)); 1240 1241 // Get the new insert position for the node we care about. 1242 BlockPointerType *NewIP = 1243 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1244 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1245 } 1246 BlockPointerType *New 1247 = new (*this, TypeAlignment) BlockPointerType(T, Canonical); 1248 Types.push_back(New); 1249 BlockPointerTypes.InsertNode(New, InsertPos); 1250 return QualType(New, 0); 1251} 1252 1253/// getLValueReferenceType - Return the uniqued reference to the type for an 1254/// lvalue reference to the specified type. 1255QualType ASTContext::getLValueReferenceType(QualType T, bool SpelledAsLValue) { 1256 // Unique pointers, to guarantee there is only one pointer of a particular 1257 // structure. 1258 llvm::FoldingSetNodeID ID; 1259 ReferenceType::Profile(ID, T, SpelledAsLValue); 1260 1261 void *InsertPos = 0; 1262 if (LValueReferenceType *RT = 1263 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1264 return QualType(RT, 0); 1265 1266 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1267 1268 // If the referencee type isn't canonical, this won't be a canonical type 1269 // either, so fill in the canonical type field. 1270 QualType Canonical; 1271 if (!SpelledAsLValue || InnerRef || !T.isCanonical()) { 1272 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1273 Canonical = getLValueReferenceType(getCanonicalType(PointeeType)); 1274 1275 // Get the new insert position for the node we care about. 1276 LValueReferenceType *NewIP = 1277 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1278 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1279 } 1280 1281 LValueReferenceType *New 1282 = new (*this, TypeAlignment) LValueReferenceType(T, Canonical, 1283 SpelledAsLValue); 1284 Types.push_back(New); 1285 LValueReferenceTypes.InsertNode(New, InsertPos); 1286 1287 return QualType(New, 0); 1288} 1289 1290/// getRValueReferenceType - Return the uniqued reference to the type for an 1291/// rvalue reference to the specified type. 1292QualType ASTContext::getRValueReferenceType(QualType T) { 1293 // Unique pointers, to guarantee there is only one pointer of a particular 1294 // structure. 1295 llvm::FoldingSetNodeID ID; 1296 ReferenceType::Profile(ID, T, false); 1297 1298 void *InsertPos = 0; 1299 if (RValueReferenceType *RT = 1300 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1301 return QualType(RT, 0); 1302 1303 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1304 1305 // If the referencee type isn't canonical, this won't be a canonical type 1306 // either, so fill in the canonical type field. 1307 QualType Canonical; 1308 if (InnerRef || !T.isCanonical()) { 1309 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1310 Canonical = getRValueReferenceType(getCanonicalType(PointeeType)); 1311 1312 // Get the new insert position for the node we care about. 1313 RValueReferenceType *NewIP = 1314 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1315 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1316 } 1317 1318 RValueReferenceType *New 1319 = new (*this, TypeAlignment) RValueReferenceType(T, Canonical); 1320 Types.push_back(New); 1321 RValueReferenceTypes.InsertNode(New, InsertPos); 1322 return QualType(New, 0); 1323} 1324 1325/// getMemberPointerType - Return the uniqued reference to the type for a 1326/// member pointer to the specified type, in the specified class. 1327QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls) { 1328 // Unique pointers, to guarantee there is only one pointer of a particular 1329 // structure. 1330 llvm::FoldingSetNodeID ID; 1331 MemberPointerType::Profile(ID, T, Cls); 1332 1333 void *InsertPos = 0; 1334 if (MemberPointerType *PT = 1335 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1336 return QualType(PT, 0); 1337 1338 // If the pointee or class type isn't canonical, this won't be a canonical 1339 // type either, so fill in the canonical type field. 1340 QualType Canonical; 1341 if (!T.isCanonical() || !Cls->isCanonicalUnqualified()) { 1342 Canonical = getMemberPointerType(getCanonicalType(T),getCanonicalType(Cls)); 1343 1344 // Get the new insert position for the node we care about. 1345 MemberPointerType *NewIP = 1346 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1347 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1348 } 1349 MemberPointerType *New 1350 = new (*this, TypeAlignment) MemberPointerType(T, Cls, Canonical); 1351 Types.push_back(New); 1352 MemberPointerTypes.InsertNode(New, InsertPos); 1353 return QualType(New, 0); 1354} 1355 1356/// getConstantArrayType - Return the unique reference to the type for an 1357/// array of the specified element type. 1358QualType ASTContext::getConstantArrayType(QualType EltTy, 1359 const llvm::APInt &ArySizeIn, 1360 ArrayType::ArraySizeModifier ASM, 1361 unsigned EltTypeQuals) { 1362 assert((EltTy->isDependentType() || 1363 EltTy->isIncompleteType() || EltTy->isConstantSizeType()) && 1364 "Constant array of VLAs is illegal!"); 1365 1366 // Convert the array size into a canonical width matching the pointer size for 1367 // the target. 1368 llvm::APInt ArySize(ArySizeIn); 1369 ArySize.zextOrTrunc(Target.getPointerWidth(EltTy.getAddressSpace())); 1370 1371 llvm::FoldingSetNodeID ID; 1372 ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, EltTypeQuals); 1373 1374 void *InsertPos = 0; 1375 if (ConstantArrayType *ATP = 1376 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1377 return QualType(ATP, 0); 1378 1379 // If the element type isn't canonical, this won't be a canonical type either, 1380 // so fill in the canonical type field. 1381 QualType Canonical; 1382 if (!EltTy.isCanonical()) { 1383 Canonical = getConstantArrayType(getCanonicalType(EltTy), ArySize, 1384 ASM, EltTypeQuals); 1385 // Get the new insert position for the node we care about. 1386 ConstantArrayType *NewIP = 1387 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1388 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1389 } 1390 1391 ConstantArrayType *New = new(*this,TypeAlignment) 1392 ConstantArrayType(EltTy, Canonical, ArySize, ASM, EltTypeQuals); 1393 ConstantArrayTypes.InsertNode(New, InsertPos); 1394 Types.push_back(New); 1395 return QualType(New, 0); 1396} 1397 1398/// getVariableArrayType - Returns a non-unique reference to the type for a 1399/// variable array of the specified element type. 1400QualType ASTContext::getVariableArrayType(QualType EltTy, 1401 Expr *NumElts, 1402 ArrayType::ArraySizeModifier ASM, 1403 unsigned EltTypeQuals, 1404 SourceRange Brackets) { 1405 // Since we don't unique expressions, it isn't possible to unique VLA's 1406 // that have an expression provided for their size. 1407 1408 VariableArrayType *New = new(*this, TypeAlignment) 1409 VariableArrayType(EltTy, QualType(), NumElts, ASM, EltTypeQuals, Brackets); 1410 1411 VariableArrayTypes.push_back(New); 1412 Types.push_back(New); 1413 return QualType(New, 0); 1414} 1415 1416/// getDependentSizedArrayType - Returns a non-unique reference to 1417/// the type for a dependently-sized array of the specified element 1418/// type. 1419QualType ASTContext::getDependentSizedArrayType(QualType EltTy, 1420 Expr *NumElts, 1421 ArrayType::ArraySizeModifier ASM, 1422 unsigned EltTypeQuals, 1423 SourceRange Brackets) { 1424 assert((!NumElts || NumElts->isTypeDependent() || 1425 NumElts->isValueDependent()) && 1426 "Size must be type- or value-dependent!"); 1427 1428 void *InsertPos = 0; 1429 DependentSizedArrayType *Canon = 0; 1430 llvm::FoldingSetNodeID ID; 1431 1432 if (NumElts) { 1433 // Dependently-sized array types that do not have a specified 1434 // number of elements will have their sizes deduced from an 1435 // initializer. 1436 DependentSizedArrayType::Profile(ID, *this, getCanonicalType(EltTy), ASM, 1437 EltTypeQuals, NumElts); 1438 1439 Canon = DependentSizedArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1440 } 1441 1442 DependentSizedArrayType *New; 1443 if (Canon) { 1444 // We already have a canonical version of this array type; use it as 1445 // the canonical type for a newly-built type. 1446 New = new (*this, TypeAlignment) 1447 DependentSizedArrayType(*this, EltTy, QualType(Canon, 0), 1448 NumElts, ASM, EltTypeQuals, Brackets); 1449 } else { 1450 QualType CanonEltTy = getCanonicalType(EltTy); 1451 if (CanonEltTy == EltTy) { 1452 New = new (*this, TypeAlignment) 1453 DependentSizedArrayType(*this, EltTy, QualType(), 1454 NumElts, ASM, EltTypeQuals, Brackets); 1455 1456 if (NumElts) { 1457 DependentSizedArrayType *CanonCheck 1458 = DependentSizedArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1459 assert(!CanonCheck && "Dependent-sized canonical array type broken"); 1460 (void)CanonCheck; 1461 DependentSizedArrayTypes.InsertNode(New, InsertPos); 1462 } 1463 } else { 1464 QualType Canon = getDependentSizedArrayType(CanonEltTy, NumElts, 1465 ASM, EltTypeQuals, 1466 SourceRange()); 1467 New = new (*this, TypeAlignment) 1468 DependentSizedArrayType(*this, EltTy, Canon, 1469 NumElts, ASM, EltTypeQuals, Brackets); 1470 } 1471 } 1472 1473 Types.push_back(New); 1474 return QualType(New, 0); 1475} 1476 1477QualType ASTContext::getIncompleteArrayType(QualType EltTy, 1478 ArrayType::ArraySizeModifier ASM, 1479 unsigned EltTypeQuals) { 1480 llvm::FoldingSetNodeID ID; 1481 IncompleteArrayType::Profile(ID, EltTy, ASM, EltTypeQuals); 1482 1483 void *InsertPos = 0; 1484 if (IncompleteArrayType *ATP = 1485 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1486 return QualType(ATP, 0); 1487 1488 // If the element type isn't canonical, this won't be a canonical type 1489 // either, so fill in the canonical type field. 1490 QualType Canonical; 1491 1492 if (!EltTy.isCanonical()) { 1493 Canonical = getIncompleteArrayType(getCanonicalType(EltTy), 1494 ASM, EltTypeQuals); 1495 1496 // Get the new insert position for the node we care about. 1497 IncompleteArrayType *NewIP = 1498 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1499 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1500 } 1501 1502 IncompleteArrayType *New = new (*this, TypeAlignment) 1503 IncompleteArrayType(EltTy, Canonical, ASM, EltTypeQuals); 1504 1505 IncompleteArrayTypes.InsertNode(New, InsertPos); 1506 Types.push_back(New); 1507 return QualType(New, 0); 1508} 1509 1510/// getVectorType - Return the unique reference to a vector type of 1511/// the specified element type and size. VectorType must be a built-in type. 1512QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts, 1513 bool IsAltiVec, bool IsPixel) { 1514 BuiltinType *baseType; 1515 1516 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1517 assert(baseType != 0 && "getVectorType(): Expecting a built-in type"); 1518 1519 // Check if we've already instantiated a vector of this type. 1520 llvm::FoldingSetNodeID ID; 1521 VectorType::Profile(ID, vecType, NumElts, Type::Vector, 1522 IsAltiVec, IsPixel); 1523 void *InsertPos = 0; 1524 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1525 return QualType(VTP, 0); 1526 1527 // If the element type isn't canonical, this won't be a canonical type either, 1528 // so fill in the canonical type field. 1529 QualType Canonical; 1530 if (!vecType.isCanonical() || IsAltiVec || IsPixel) { 1531 Canonical = getVectorType(getCanonicalType(vecType), 1532 NumElts, false, false); 1533 1534 // Get the new insert position for the node we care about. 1535 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1536 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1537 } 1538 VectorType *New = new (*this, TypeAlignment) 1539 VectorType(vecType, NumElts, Canonical, IsAltiVec, IsPixel); 1540 VectorTypes.InsertNode(New, InsertPos); 1541 Types.push_back(New); 1542 return QualType(New, 0); 1543} 1544 1545/// getExtVectorType - Return the unique reference to an extended vector type of 1546/// the specified element type and size. VectorType must be a built-in type. 1547QualType ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) { 1548 BuiltinType *baseType; 1549 1550 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1551 assert(baseType != 0 && "getExtVectorType(): Expecting a built-in type"); 1552 1553 // Check if we've already instantiated a vector of this type. 1554 llvm::FoldingSetNodeID ID; 1555 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector, false, false); 1556 void *InsertPos = 0; 1557 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1558 return QualType(VTP, 0); 1559 1560 // If the element type isn't canonical, this won't be a canonical type either, 1561 // so fill in the canonical type field. 1562 QualType Canonical; 1563 if (!vecType.isCanonical()) { 1564 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts); 1565 1566 // Get the new insert position for the node we care about. 1567 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1568 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1569 } 1570 ExtVectorType *New = new (*this, TypeAlignment) 1571 ExtVectorType(vecType, NumElts, Canonical); 1572 VectorTypes.InsertNode(New, InsertPos); 1573 Types.push_back(New); 1574 return QualType(New, 0); 1575} 1576 1577QualType ASTContext::getDependentSizedExtVectorType(QualType vecType, 1578 Expr *SizeExpr, 1579 SourceLocation AttrLoc) { 1580 llvm::FoldingSetNodeID ID; 1581 DependentSizedExtVectorType::Profile(ID, *this, getCanonicalType(vecType), 1582 SizeExpr); 1583 1584 void *InsertPos = 0; 1585 DependentSizedExtVectorType *Canon 1586 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1587 DependentSizedExtVectorType *New; 1588 if (Canon) { 1589 // We already have a canonical version of this array type; use it as 1590 // the canonical type for a newly-built type. 1591 New = new (*this, TypeAlignment) 1592 DependentSizedExtVectorType(*this, vecType, QualType(Canon, 0), 1593 SizeExpr, AttrLoc); 1594 } else { 1595 QualType CanonVecTy = getCanonicalType(vecType); 1596 if (CanonVecTy == vecType) { 1597 New = new (*this, TypeAlignment) 1598 DependentSizedExtVectorType(*this, vecType, QualType(), SizeExpr, 1599 AttrLoc); 1600 1601 DependentSizedExtVectorType *CanonCheck 1602 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1603 assert(!CanonCheck && "Dependent-sized ext_vector canonical type broken"); 1604 (void)CanonCheck; 1605 DependentSizedExtVectorTypes.InsertNode(New, InsertPos); 1606 } else { 1607 QualType Canon = getDependentSizedExtVectorType(CanonVecTy, SizeExpr, 1608 SourceLocation()); 1609 New = new (*this, TypeAlignment) 1610 DependentSizedExtVectorType(*this, vecType, Canon, SizeExpr, AttrLoc); 1611 } 1612 } 1613 1614 Types.push_back(New); 1615 return QualType(New, 0); 1616} 1617 1618/// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 1619/// 1620QualType ASTContext::getFunctionNoProtoType(QualType ResultTy, bool NoReturn, 1621 CallingConv CallConv) { 1622 // Unique functions, to guarantee there is only one function of a particular 1623 // structure. 1624 llvm::FoldingSetNodeID ID; 1625 FunctionNoProtoType::Profile(ID, ResultTy, NoReturn, CallConv); 1626 1627 void *InsertPos = 0; 1628 if (FunctionNoProtoType *FT = 1629 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1630 return QualType(FT, 0); 1631 1632 QualType Canonical; 1633 if (!ResultTy.isCanonical() || 1634 getCanonicalCallConv(CallConv) != CallConv) { 1635 Canonical = getFunctionNoProtoType(getCanonicalType(ResultTy), NoReturn, 1636 getCanonicalCallConv(CallConv)); 1637 1638 // Get the new insert position for the node we care about. 1639 FunctionNoProtoType *NewIP = 1640 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1641 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1642 } 1643 1644 FunctionNoProtoType *New = new (*this, TypeAlignment) 1645 FunctionNoProtoType(ResultTy, Canonical, NoReturn, CallConv); 1646 Types.push_back(New); 1647 FunctionNoProtoTypes.InsertNode(New, InsertPos); 1648 return QualType(New, 0); 1649} 1650 1651/// getFunctionType - Return a normal function type with a typed argument 1652/// list. isVariadic indicates whether the argument list includes '...'. 1653QualType ASTContext::getFunctionType(QualType ResultTy,const QualType *ArgArray, 1654 unsigned NumArgs, bool isVariadic, 1655 unsigned TypeQuals, bool hasExceptionSpec, 1656 bool hasAnyExceptionSpec, unsigned NumExs, 1657 const QualType *ExArray, bool NoReturn, 1658 CallingConv CallConv) { 1659 // Unique functions, to guarantee there is only one function of a particular 1660 // structure. 1661 llvm::FoldingSetNodeID ID; 1662 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, isVariadic, 1663 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1664 NumExs, ExArray, NoReturn, CallConv); 1665 1666 void *InsertPos = 0; 1667 if (FunctionProtoType *FTP = 1668 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1669 return QualType(FTP, 0); 1670 1671 // Determine whether the type being created is already canonical or not. 1672 bool isCanonical = !hasExceptionSpec && ResultTy.isCanonical(); 1673 for (unsigned i = 0; i != NumArgs && isCanonical; ++i) 1674 if (!ArgArray[i].isCanonicalAsParam()) 1675 isCanonical = false; 1676 1677 // If this type isn't canonical, get the canonical version of it. 1678 // The exception spec is not part of the canonical type. 1679 QualType Canonical; 1680 if (!isCanonical || getCanonicalCallConv(CallConv) != CallConv) { 1681 llvm::SmallVector<QualType, 16> CanonicalArgs; 1682 CanonicalArgs.reserve(NumArgs); 1683 for (unsigned i = 0; i != NumArgs; ++i) 1684 CanonicalArgs.push_back(getCanonicalParamType(ArgArray[i])); 1685 1686 Canonical = getFunctionType(getCanonicalType(ResultTy), 1687 CanonicalArgs.data(), NumArgs, 1688 isVariadic, TypeQuals, false, 1689 false, 0, 0, NoReturn, 1690 getCanonicalCallConv(CallConv)); 1691 1692 // Get the new insert position for the node we care about. 1693 FunctionProtoType *NewIP = 1694 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1695 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1696 } 1697 1698 // FunctionProtoType objects are allocated with extra bytes after them 1699 // for two variable size arrays (for parameter and exception types) at the 1700 // end of them. 1701 FunctionProtoType *FTP = 1702 (FunctionProtoType*)Allocate(sizeof(FunctionProtoType) + 1703 NumArgs*sizeof(QualType) + 1704 NumExs*sizeof(QualType), TypeAlignment); 1705 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, isVariadic, 1706 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1707 ExArray, NumExs, Canonical, NoReturn, CallConv); 1708 Types.push_back(FTP); 1709 FunctionProtoTypes.InsertNode(FTP, InsertPos); 1710 return QualType(FTP, 0); 1711} 1712 1713#ifndef NDEBUG 1714static bool NeedsInjectedClassNameType(const RecordDecl *D) { 1715 if (!isa<CXXRecordDecl>(D)) return false; 1716 const CXXRecordDecl *RD = cast<CXXRecordDecl>(D); 1717 if (isa<ClassTemplatePartialSpecializationDecl>(RD)) 1718 return true; 1719 if (RD->getDescribedClassTemplate() && 1720 !isa<ClassTemplateSpecializationDecl>(RD)) 1721 return true; 1722 return false; 1723} 1724#endif 1725 1726/// getInjectedClassNameType - Return the unique reference to the 1727/// injected class name type for the specified templated declaration. 1728QualType ASTContext::getInjectedClassNameType(CXXRecordDecl *Decl, 1729 QualType TST) { 1730 assert(NeedsInjectedClassNameType(Decl)); 1731 if (Decl->TypeForDecl) { 1732 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1733 } else if (CXXRecordDecl *PrevDecl 1734 = cast_or_null<CXXRecordDecl>(Decl->getPreviousDeclaration())) { 1735 assert(PrevDecl->TypeForDecl && "previous declaration has no type"); 1736 Decl->TypeForDecl = PrevDecl->TypeForDecl; 1737 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1738 } else { 1739 Decl->TypeForDecl = new (*this, TypeAlignment) 1740 InjectedClassNameType(Decl, TST, TST->getCanonicalTypeInternal()); 1741 Types.push_back(Decl->TypeForDecl); 1742 } 1743 return QualType(Decl->TypeForDecl, 0); 1744} 1745 1746/// getTypeDeclType - Return the unique reference to the type for the 1747/// specified type declaration. 1748QualType ASTContext::getTypeDeclTypeSlow(const TypeDecl *Decl) { 1749 assert(Decl && "Passed null for Decl param"); 1750 assert(!Decl->TypeForDecl && "TypeForDecl present in slow case"); 1751 1752 if (const TypedefDecl *Typedef = dyn_cast<TypedefDecl>(Decl)) 1753 return getTypedefType(Typedef); 1754 1755 if (const ObjCInterfaceDecl *ObjCInterface 1756 = dyn_cast<ObjCInterfaceDecl>(Decl)) 1757 return getObjCInterfaceType(ObjCInterface); 1758 1759 assert(!isa<TemplateTypeParmDecl>(Decl) && 1760 "Template type parameter types are always available."); 1761 1762 if (const RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) { 1763 assert(!Record->getPreviousDeclaration() && 1764 "struct/union has previous declaration"); 1765 assert(!NeedsInjectedClassNameType(Record)); 1766 Decl->TypeForDecl = new (*this, TypeAlignment) RecordType(Record); 1767 } else if (const EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) { 1768 assert(!Enum->getPreviousDeclaration() && 1769 "enum has previous declaration"); 1770 Decl->TypeForDecl = new (*this, TypeAlignment) EnumType(Enum); 1771 } else if (const UnresolvedUsingTypenameDecl *Using = 1772 dyn_cast<UnresolvedUsingTypenameDecl>(Decl)) { 1773 Decl->TypeForDecl = new (*this, TypeAlignment) UnresolvedUsingType(Using); 1774 } else 1775 llvm_unreachable("TypeDecl without a type?"); 1776 1777 Types.push_back(Decl->TypeForDecl); 1778 return QualType(Decl->TypeForDecl, 0); 1779} 1780 1781/// getTypedefType - Return the unique reference to the type for the 1782/// specified typename decl. 1783QualType ASTContext::getTypedefType(const TypedefDecl *Decl) { 1784 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1785 1786 QualType Canonical = getCanonicalType(Decl->getUnderlyingType()); 1787 Decl->TypeForDecl = new(*this, TypeAlignment) 1788 TypedefType(Type::Typedef, Decl, Canonical); 1789 Types.push_back(Decl->TypeForDecl); 1790 return QualType(Decl->TypeForDecl, 0); 1791} 1792 1793/// \brief Retrieve a substitution-result type. 1794QualType 1795ASTContext::getSubstTemplateTypeParmType(const TemplateTypeParmType *Parm, 1796 QualType Replacement) { 1797 assert(Replacement.isCanonical() 1798 && "replacement types must always be canonical"); 1799 1800 llvm::FoldingSetNodeID ID; 1801 SubstTemplateTypeParmType::Profile(ID, Parm, Replacement); 1802 void *InsertPos = 0; 1803 SubstTemplateTypeParmType *SubstParm 1804 = SubstTemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1805 1806 if (!SubstParm) { 1807 SubstParm = new (*this, TypeAlignment) 1808 SubstTemplateTypeParmType(Parm, Replacement); 1809 Types.push_back(SubstParm); 1810 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 1811 } 1812 1813 return QualType(SubstParm, 0); 1814} 1815 1816/// \brief Retrieve the template type parameter type for a template 1817/// parameter or parameter pack with the given depth, index, and (optionally) 1818/// name. 1819QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index, 1820 bool ParameterPack, 1821 IdentifierInfo *Name) { 1822 llvm::FoldingSetNodeID ID; 1823 TemplateTypeParmType::Profile(ID, Depth, Index, ParameterPack, Name); 1824 void *InsertPos = 0; 1825 TemplateTypeParmType *TypeParm 1826 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1827 1828 if (TypeParm) 1829 return QualType(TypeParm, 0); 1830 1831 if (Name) { 1832 QualType Canon = getTemplateTypeParmType(Depth, Index, ParameterPack); 1833 TypeParm = new (*this, TypeAlignment) 1834 TemplateTypeParmType(Depth, Index, ParameterPack, Name, Canon); 1835 1836 TemplateTypeParmType *TypeCheck 1837 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1838 assert(!TypeCheck && "Template type parameter canonical type broken"); 1839 (void)TypeCheck; 1840 } else 1841 TypeParm = new (*this, TypeAlignment) 1842 TemplateTypeParmType(Depth, Index, ParameterPack); 1843 1844 Types.push_back(TypeParm); 1845 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos); 1846 1847 return QualType(TypeParm, 0); 1848} 1849 1850TypeSourceInfo * 1851ASTContext::getTemplateSpecializationTypeInfo(TemplateName Name, 1852 SourceLocation NameLoc, 1853 const TemplateArgumentListInfo &Args, 1854 QualType CanonType) { 1855 QualType TST = getTemplateSpecializationType(Name, Args, CanonType); 1856 1857 TypeSourceInfo *DI = CreateTypeSourceInfo(TST); 1858 TemplateSpecializationTypeLoc TL 1859 = cast<TemplateSpecializationTypeLoc>(DI->getTypeLoc()); 1860 TL.setTemplateNameLoc(NameLoc); 1861 TL.setLAngleLoc(Args.getLAngleLoc()); 1862 TL.setRAngleLoc(Args.getRAngleLoc()); 1863 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 1864 TL.setArgLocInfo(i, Args[i].getLocInfo()); 1865 return DI; 1866} 1867 1868QualType 1869ASTContext::getTemplateSpecializationType(TemplateName Template, 1870 const TemplateArgumentListInfo &Args, 1871 QualType Canon) { 1872 unsigned NumArgs = Args.size(); 1873 1874 llvm::SmallVector<TemplateArgument, 4> ArgVec; 1875 ArgVec.reserve(NumArgs); 1876 for (unsigned i = 0; i != NumArgs; ++i) 1877 ArgVec.push_back(Args[i].getArgument()); 1878 1879 return getTemplateSpecializationType(Template, ArgVec.data(), NumArgs, Canon); 1880} 1881 1882QualType 1883ASTContext::getTemplateSpecializationType(TemplateName Template, 1884 const TemplateArgument *Args, 1885 unsigned NumArgs, 1886 QualType Canon) { 1887 if (!Canon.isNull()) 1888 Canon = getCanonicalType(Canon); 1889 else { 1890 // Build the canonical template specialization type. 1891 TemplateName CanonTemplate = getCanonicalTemplateName(Template); 1892 llvm::SmallVector<TemplateArgument, 4> CanonArgs; 1893 CanonArgs.reserve(NumArgs); 1894 for (unsigned I = 0; I != NumArgs; ++I) 1895 CanonArgs.push_back(getCanonicalTemplateArgument(Args[I])); 1896 1897 // Determine whether this canonical template specialization type already 1898 // exists. 1899 llvm::FoldingSetNodeID ID; 1900 TemplateSpecializationType::Profile(ID, CanonTemplate, 1901 CanonArgs.data(), NumArgs, *this); 1902 1903 void *InsertPos = 0; 1904 TemplateSpecializationType *Spec 1905 = TemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 1906 1907 if (!Spec) { 1908 // Allocate a new canonical template specialization type. 1909 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 1910 sizeof(TemplateArgument) * NumArgs), 1911 TypeAlignment); 1912 Spec = new (Mem) TemplateSpecializationType(*this, CanonTemplate, 1913 CanonArgs.data(), NumArgs, 1914 Canon); 1915 Types.push_back(Spec); 1916 TemplateSpecializationTypes.InsertNode(Spec, InsertPos); 1917 } 1918 1919 if (Canon.isNull()) 1920 Canon = QualType(Spec, 0); 1921 assert(Canon->isDependentType() && 1922 "Non-dependent template-id type must have a canonical type"); 1923 } 1924 1925 // Allocate the (non-canonical) template specialization type, but don't 1926 // try to unique it: these types typically have location information that 1927 // we don't unique and don't want to lose. 1928 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 1929 sizeof(TemplateArgument) * NumArgs), 1930 TypeAlignment); 1931 TemplateSpecializationType *Spec 1932 = new (Mem) TemplateSpecializationType(*this, Template, Args, NumArgs, 1933 Canon); 1934 1935 Types.push_back(Spec); 1936 return QualType(Spec, 0); 1937} 1938 1939QualType 1940ASTContext::getQualifiedNameType(NestedNameSpecifier *NNS, 1941 QualType NamedType) { 1942 llvm::FoldingSetNodeID ID; 1943 QualifiedNameType::Profile(ID, NNS, NamedType); 1944 1945 void *InsertPos = 0; 1946 QualifiedNameType *T 1947 = QualifiedNameTypes.FindNodeOrInsertPos(ID, InsertPos); 1948 if (T) 1949 return QualType(T, 0); 1950 1951 QualType Canon = NamedType; 1952 if (!Canon.isCanonical()) { 1953 Canon = getCanonicalType(NamedType); 1954 QualifiedNameType *CheckT 1955 = QualifiedNameTypes.FindNodeOrInsertPos(ID, InsertPos); 1956 assert(!CheckT && "Qualified name canonical type broken"); 1957 (void)CheckT; 1958 } 1959 1960 T = new (*this) QualifiedNameType(NNS, NamedType, Canon); 1961 Types.push_back(T); 1962 QualifiedNameTypes.InsertNode(T, InsertPos); 1963 return QualType(T, 0); 1964} 1965 1966QualType ASTContext::getTypenameType(NestedNameSpecifier *NNS, 1967 const IdentifierInfo *Name, 1968 QualType Canon) { 1969 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 1970 1971 if (Canon.isNull()) { 1972 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 1973 if (CanonNNS != NNS) 1974 Canon = getTypenameType(CanonNNS, Name); 1975 } 1976 1977 llvm::FoldingSetNodeID ID; 1978 TypenameType::Profile(ID, NNS, Name); 1979 1980 void *InsertPos = 0; 1981 TypenameType *T 1982 = TypenameTypes.FindNodeOrInsertPos(ID, InsertPos); 1983 if (T) 1984 return QualType(T, 0); 1985 1986 T = new (*this) TypenameType(NNS, Name, Canon); 1987 Types.push_back(T); 1988 TypenameTypes.InsertNode(T, InsertPos); 1989 return QualType(T, 0); 1990} 1991 1992QualType 1993ASTContext::getTypenameType(NestedNameSpecifier *NNS, 1994 const TemplateSpecializationType *TemplateId, 1995 QualType Canon) { 1996 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 1997 1998 llvm::FoldingSetNodeID ID; 1999 TypenameType::Profile(ID, NNS, TemplateId); 2000 2001 void *InsertPos = 0; 2002 TypenameType *T 2003 = TypenameTypes.FindNodeOrInsertPos(ID, InsertPos); 2004 if (T) 2005 return QualType(T, 0); 2006 2007 if (Canon.isNull()) { 2008 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2009 QualType CanonType = getCanonicalType(QualType(TemplateId, 0)); 2010 if (CanonNNS != NNS || CanonType != QualType(TemplateId, 0)) { 2011 const TemplateSpecializationType *CanonTemplateId 2012 = CanonType->getAs<TemplateSpecializationType>(); 2013 assert(CanonTemplateId && 2014 "Canonical type must also be a template specialization type"); 2015 Canon = getTypenameType(CanonNNS, CanonTemplateId); 2016 } 2017 2018 TypenameType *CheckT 2019 = TypenameTypes.FindNodeOrInsertPos(ID, InsertPos); 2020 assert(!CheckT && "Typename canonical type is broken"); (void)CheckT; 2021 } 2022 2023 T = new (*this) TypenameType(NNS, TemplateId, Canon); 2024 Types.push_back(T); 2025 TypenameTypes.InsertNode(T, InsertPos); 2026 return QualType(T, 0); 2027} 2028 2029QualType 2030ASTContext::getElaboratedType(QualType UnderlyingType, 2031 ElaboratedType::TagKind Tag) { 2032 llvm::FoldingSetNodeID ID; 2033 ElaboratedType::Profile(ID, UnderlyingType, Tag); 2034 2035 void *InsertPos = 0; 2036 ElaboratedType *T = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2037 if (T) 2038 return QualType(T, 0); 2039 2040 QualType Canon = UnderlyingType; 2041 if (!Canon.isCanonical()) { 2042 Canon = getCanonicalType(Canon); 2043 ElaboratedType *CheckT = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2044 assert(!CheckT && "Elaborated canonical type is broken"); (void)CheckT; 2045 } 2046 2047 T = new (*this) ElaboratedType(UnderlyingType, Tag, Canon); 2048 Types.push_back(T); 2049 ElaboratedTypes.InsertNode(T, InsertPos); 2050 return QualType(T, 0); 2051} 2052 2053/// CmpProtocolNames - Comparison predicate for sorting protocols 2054/// alphabetically. 2055static bool CmpProtocolNames(const ObjCProtocolDecl *LHS, 2056 const ObjCProtocolDecl *RHS) { 2057 return LHS->getDeclName() < RHS->getDeclName(); 2058} 2059 2060static bool areSortedAndUniqued(ObjCProtocolDecl **Protocols, 2061 unsigned NumProtocols) { 2062 if (NumProtocols == 0) return true; 2063 2064 for (unsigned i = 1; i != NumProtocols; ++i) 2065 if (!CmpProtocolNames(Protocols[i-1], Protocols[i])) 2066 return false; 2067 return true; 2068} 2069 2070static void SortAndUniqueProtocols(ObjCProtocolDecl **Protocols, 2071 unsigned &NumProtocols) { 2072 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols; 2073 2074 // Sort protocols, keyed by name. 2075 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames); 2076 2077 // Remove duplicates. 2078 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd); 2079 NumProtocols = ProtocolsEnd-Protocols; 2080} 2081 2082/// getObjCObjectPointerType - Return a ObjCObjectPointerType type for 2083/// the given interface decl and the conforming protocol list. 2084QualType ASTContext::getObjCObjectPointerType(QualType InterfaceT, 2085 ObjCProtocolDecl **Protocols, 2086 unsigned NumProtocols, 2087 unsigned Quals) { 2088 llvm::FoldingSetNodeID ID; 2089 ObjCObjectPointerType::Profile(ID, InterfaceT, Protocols, NumProtocols); 2090 Qualifiers Qs = Qualifiers::fromCVRMask(Quals); 2091 2092 void *InsertPos = 0; 2093 if (ObjCObjectPointerType *QT = 2094 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 2095 return getQualifiedType(QualType(QT, 0), Qs); 2096 2097 // Sort the protocol list alphabetically to canonicalize it. 2098 QualType Canonical; 2099 if (!InterfaceT.isCanonical() || 2100 !areSortedAndUniqued(Protocols, NumProtocols)) { 2101 if (!areSortedAndUniqued(Protocols, NumProtocols)) { 2102 llvm::SmallVector<ObjCProtocolDecl*, 8> Sorted(NumProtocols); 2103 unsigned UniqueCount = NumProtocols; 2104 2105 std::copy(Protocols, Protocols + NumProtocols, Sorted.begin()); 2106 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2107 2108 Canonical = getObjCObjectPointerType(getCanonicalType(InterfaceT), 2109 &Sorted[0], UniqueCount); 2110 } else { 2111 Canonical = getObjCObjectPointerType(getCanonicalType(InterfaceT), 2112 Protocols, NumProtocols); 2113 } 2114 2115 // Regenerate InsertPos. 2116 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 2117 } 2118 2119 // No match. 2120 unsigned Size = sizeof(ObjCObjectPointerType) 2121 + NumProtocols * sizeof(ObjCProtocolDecl *); 2122 void *Mem = Allocate(Size, TypeAlignment); 2123 ObjCObjectPointerType *QType = new (Mem) ObjCObjectPointerType(Canonical, 2124 InterfaceT, 2125 Protocols, 2126 NumProtocols); 2127 2128 Types.push_back(QType); 2129 ObjCObjectPointerTypes.InsertNode(QType, InsertPos); 2130 return getQualifiedType(QualType(QType, 0), Qs); 2131} 2132 2133/// getObjCInterfaceType - Return the unique reference to the type for the 2134/// specified ObjC interface decl. The list of protocols is optional. 2135QualType ASTContext::getObjCInterfaceType(const ObjCInterfaceDecl *Decl, 2136 ObjCProtocolDecl **Protocols, unsigned NumProtocols) { 2137 llvm::FoldingSetNodeID ID; 2138 ObjCInterfaceType::Profile(ID, Decl, Protocols, NumProtocols); 2139 2140 void *InsertPos = 0; 2141 if (ObjCInterfaceType *QT = 2142 ObjCInterfaceTypes.FindNodeOrInsertPos(ID, InsertPos)) 2143 return QualType(QT, 0); 2144 2145 // Sort the protocol list alphabetically to canonicalize it. 2146 QualType Canonical; 2147 if (NumProtocols && !areSortedAndUniqued(Protocols, NumProtocols)) { 2148 llvm::SmallVector<ObjCProtocolDecl*, 8> Sorted(NumProtocols); 2149 std::copy(Protocols, Protocols + NumProtocols, Sorted.begin()); 2150 2151 unsigned UniqueCount = NumProtocols; 2152 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2153 2154 Canonical = getObjCInterfaceType(Decl, &Sorted[0], UniqueCount); 2155 2156 ObjCInterfaceTypes.FindNodeOrInsertPos(ID, InsertPos); 2157 } 2158 2159 unsigned Size = sizeof(ObjCInterfaceType) 2160 + NumProtocols * sizeof(ObjCProtocolDecl *); 2161 void *Mem = Allocate(Size, TypeAlignment); 2162 ObjCInterfaceType *QType = new (Mem) ObjCInterfaceType(Canonical, 2163 const_cast<ObjCInterfaceDecl*>(Decl), 2164 Protocols, 2165 NumProtocols); 2166 2167 Types.push_back(QType); 2168 ObjCInterfaceTypes.InsertNode(QType, InsertPos); 2169 return QualType(QType, 0); 2170} 2171 2172/// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique 2173/// TypeOfExprType AST's (since expression's are never shared). For example, 2174/// multiple declarations that refer to "typeof(x)" all contain different 2175/// DeclRefExpr's. This doesn't effect the type checker, since it operates 2176/// on canonical type's (which are always unique). 2177QualType ASTContext::getTypeOfExprType(Expr *tofExpr) { 2178 TypeOfExprType *toe; 2179 if (tofExpr->isTypeDependent()) { 2180 llvm::FoldingSetNodeID ID; 2181 DependentTypeOfExprType::Profile(ID, *this, tofExpr); 2182 2183 void *InsertPos = 0; 2184 DependentTypeOfExprType *Canon 2185 = DependentTypeOfExprTypes.FindNodeOrInsertPos(ID, InsertPos); 2186 if (Canon) { 2187 // We already have a "canonical" version of an identical, dependent 2188 // typeof(expr) type. Use that as our canonical type. 2189 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, 2190 QualType((TypeOfExprType*)Canon, 0)); 2191 } 2192 else { 2193 // Build a new, canonical typeof(expr) type. 2194 Canon 2195 = new (*this, TypeAlignment) DependentTypeOfExprType(*this, tofExpr); 2196 DependentTypeOfExprTypes.InsertNode(Canon, InsertPos); 2197 toe = Canon; 2198 } 2199 } else { 2200 QualType Canonical = getCanonicalType(tofExpr->getType()); 2201 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, Canonical); 2202 } 2203 Types.push_back(toe); 2204 return QualType(toe, 0); 2205} 2206 2207/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique 2208/// TypeOfType AST's. The only motivation to unique these nodes would be 2209/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be 2210/// an issue. This doesn't effect the type checker, since it operates 2211/// on canonical type's (which are always unique). 2212QualType ASTContext::getTypeOfType(QualType tofType) { 2213 QualType Canonical = getCanonicalType(tofType); 2214 TypeOfType *tot = new (*this, TypeAlignment) TypeOfType(tofType, Canonical); 2215 Types.push_back(tot); 2216 return QualType(tot, 0); 2217} 2218 2219/// getDecltypeForExpr - Given an expr, will return the decltype for that 2220/// expression, according to the rules in C++0x [dcl.type.simple]p4 2221static QualType getDecltypeForExpr(const Expr *e, ASTContext &Context) { 2222 if (e->isTypeDependent()) 2223 return Context.DependentTy; 2224 2225 // If e is an id expression or a class member access, decltype(e) is defined 2226 // as the type of the entity named by e. 2227 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(e)) { 2228 if (const ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl())) 2229 return VD->getType(); 2230 } 2231 if (const MemberExpr *ME = dyn_cast<MemberExpr>(e)) { 2232 if (const FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) 2233 return FD->getType(); 2234 } 2235 // If e is a function call or an invocation of an overloaded operator, 2236 // (parentheses around e are ignored), decltype(e) is defined as the 2237 // return type of that function. 2238 if (const CallExpr *CE = dyn_cast<CallExpr>(e->IgnoreParens())) 2239 return CE->getCallReturnType(); 2240 2241 QualType T = e->getType(); 2242 2243 // Otherwise, where T is the type of e, if e is an lvalue, decltype(e) is 2244 // defined as T&, otherwise decltype(e) is defined as T. 2245 if (e->isLvalue(Context) == Expr::LV_Valid) 2246 T = Context.getLValueReferenceType(T); 2247 2248 return T; 2249} 2250 2251/// getDecltypeType - Unlike many "get<Type>" functions, we don't unique 2252/// DecltypeType AST's. The only motivation to unique these nodes would be 2253/// memory savings. Since decltype(t) is fairly uncommon, space shouldn't be 2254/// an issue. This doesn't effect the type checker, since it operates 2255/// on canonical type's (which are always unique). 2256QualType ASTContext::getDecltypeType(Expr *e) { 2257 DecltypeType *dt; 2258 if (e->isTypeDependent()) { 2259 llvm::FoldingSetNodeID ID; 2260 DependentDecltypeType::Profile(ID, *this, e); 2261 2262 void *InsertPos = 0; 2263 DependentDecltypeType *Canon 2264 = DependentDecltypeTypes.FindNodeOrInsertPos(ID, InsertPos); 2265 if (Canon) { 2266 // We already have a "canonical" version of an equivalent, dependent 2267 // decltype type. Use that as our canonical type. 2268 dt = new (*this, TypeAlignment) DecltypeType(e, DependentTy, 2269 QualType((DecltypeType*)Canon, 0)); 2270 } 2271 else { 2272 // Build a new, canonical typeof(expr) type. 2273 Canon = new (*this, TypeAlignment) DependentDecltypeType(*this, e); 2274 DependentDecltypeTypes.InsertNode(Canon, InsertPos); 2275 dt = Canon; 2276 } 2277 } else { 2278 QualType T = getDecltypeForExpr(e, *this); 2279 dt = new (*this, TypeAlignment) DecltypeType(e, T, getCanonicalType(T)); 2280 } 2281 Types.push_back(dt); 2282 return QualType(dt, 0); 2283} 2284 2285/// getTagDeclType - Return the unique reference to the type for the 2286/// specified TagDecl (struct/union/class/enum) decl. 2287QualType ASTContext::getTagDeclType(const TagDecl *Decl) { 2288 assert (Decl); 2289 // FIXME: What is the design on getTagDeclType when it requires casting 2290 // away const? mutable? 2291 return getTypeDeclType(const_cast<TagDecl*>(Decl)); 2292} 2293 2294/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result 2295/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and 2296/// needs to agree with the definition in <stddef.h>. 2297CanQualType ASTContext::getSizeType() const { 2298 return getFromTargetType(Target.getSizeType()); 2299} 2300 2301/// getSignedWCharType - Return the type of "signed wchar_t". 2302/// Used when in C++, as a GCC extension. 2303QualType ASTContext::getSignedWCharType() const { 2304 // FIXME: derive from "Target" ? 2305 return WCharTy; 2306} 2307 2308/// getUnsignedWCharType - Return the type of "unsigned wchar_t". 2309/// Used when in C++, as a GCC extension. 2310QualType ASTContext::getUnsignedWCharType() const { 2311 // FIXME: derive from "Target" ? 2312 return UnsignedIntTy; 2313} 2314 2315/// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 2316/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 2317QualType ASTContext::getPointerDiffType() const { 2318 return getFromTargetType(Target.getPtrDiffType(0)); 2319} 2320 2321//===----------------------------------------------------------------------===// 2322// Type Operators 2323//===----------------------------------------------------------------------===// 2324 2325CanQualType ASTContext::getCanonicalParamType(QualType T) { 2326 // Push qualifiers into arrays, and then discard any remaining 2327 // qualifiers. 2328 T = getCanonicalType(T); 2329 const Type *Ty = T.getTypePtr(); 2330 2331 QualType Result; 2332 if (isa<ArrayType>(Ty)) { 2333 Result = getArrayDecayedType(QualType(Ty,0)); 2334 } else if (isa<FunctionType>(Ty)) { 2335 Result = getPointerType(QualType(Ty, 0)); 2336 } else { 2337 Result = QualType(Ty, 0); 2338 } 2339 2340 return CanQualType::CreateUnsafe(Result); 2341} 2342 2343/// getCanonicalType - Return the canonical (structural) type corresponding to 2344/// the specified potentially non-canonical type. The non-canonical version 2345/// of a type may have many "decorated" versions of types. Decorators can 2346/// include typedefs, 'typeof' operators, etc. The returned type is guaranteed 2347/// to be free of any of these, allowing two canonical types to be compared 2348/// for exact equality with a simple pointer comparison. 2349CanQualType ASTContext::getCanonicalType(QualType T) { 2350 QualifierCollector Quals; 2351 const Type *Ptr = Quals.strip(T); 2352 QualType CanType = Ptr->getCanonicalTypeInternal(); 2353 2354 // The canonical internal type will be the canonical type *except* 2355 // that we push type qualifiers down through array types. 2356 2357 // If there are no new qualifiers to push down, stop here. 2358 if (!Quals.hasQualifiers()) 2359 return CanQualType::CreateUnsafe(CanType); 2360 2361 // If the type qualifiers are on an array type, get the canonical 2362 // type of the array with the qualifiers applied to the element 2363 // type. 2364 ArrayType *AT = dyn_cast<ArrayType>(CanType); 2365 if (!AT) 2366 return CanQualType::CreateUnsafe(getQualifiedType(CanType, Quals)); 2367 2368 // Get the canonical version of the element with the extra qualifiers on it. 2369 // This can recursively sink qualifiers through multiple levels of arrays. 2370 QualType NewEltTy = getQualifiedType(AT->getElementType(), Quals); 2371 NewEltTy = getCanonicalType(NewEltTy); 2372 2373 if (ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 2374 return CanQualType::CreateUnsafe( 2375 getConstantArrayType(NewEltTy, CAT->getSize(), 2376 CAT->getSizeModifier(), 2377 CAT->getIndexTypeCVRQualifiers())); 2378 if (IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) 2379 return CanQualType::CreateUnsafe( 2380 getIncompleteArrayType(NewEltTy, IAT->getSizeModifier(), 2381 IAT->getIndexTypeCVRQualifiers())); 2382 2383 if (DependentSizedArrayType *DSAT = dyn_cast<DependentSizedArrayType>(AT)) 2384 return CanQualType::CreateUnsafe( 2385 getDependentSizedArrayType(NewEltTy, 2386 DSAT->getSizeExpr() ? 2387 DSAT->getSizeExpr()->Retain() : 0, 2388 DSAT->getSizeModifier(), 2389 DSAT->getIndexTypeCVRQualifiers(), 2390 DSAT->getBracketsRange())->getCanonicalTypeInternal()); 2391 2392 VariableArrayType *VAT = cast<VariableArrayType>(AT); 2393 return CanQualType::CreateUnsafe(getVariableArrayType(NewEltTy, 2394 VAT->getSizeExpr() ? 2395 VAT->getSizeExpr()->Retain() : 0, 2396 VAT->getSizeModifier(), 2397 VAT->getIndexTypeCVRQualifiers(), 2398 VAT->getBracketsRange())); 2399} 2400 2401QualType ASTContext::getUnqualifiedArrayType(QualType T, 2402 Qualifiers &Quals) { 2403 Quals = T.getQualifiers(); 2404 if (!isa<ArrayType>(T)) { 2405 return T.getUnqualifiedType(); 2406 } 2407 2408 const ArrayType *AT = cast<ArrayType>(T); 2409 QualType Elt = AT->getElementType(); 2410 QualType UnqualElt = getUnqualifiedArrayType(Elt, Quals); 2411 if (Elt == UnqualElt) 2412 return T; 2413 2414 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(T)) { 2415 return getConstantArrayType(UnqualElt, CAT->getSize(), 2416 CAT->getSizeModifier(), 0); 2417 } 2418 2419 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(T)) { 2420 return getIncompleteArrayType(UnqualElt, IAT->getSizeModifier(), 0); 2421 } 2422 2423 const DependentSizedArrayType *DSAT = cast<DependentSizedArrayType>(T); 2424 return getDependentSizedArrayType(UnqualElt, DSAT->getSizeExpr()->Retain(), 2425 DSAT->getSizeModifier(), 0, 2426 SourceRange()); 2427} 2428 2429DeclarationName ASTContext::getNameForTemplate(TemplateName Name) { 2430 if (TemplateDecl *TD = Name.getAsTemplateDecl()) 2431 return TD->getDeclName(); 2432 2433 if (DependentTemplateName *DTN = Name.getAsDependentTemplateName()) { 2434 if (DTN->isIdentifier()) { 2435 return DeclarationNames.getIdentifier(DTN->getIdentifier()); 2436 } else { 2437 return DeclarationNames.getCXXOperatorName(DTN->getOperator()); 2438 } 2439 } 2440 2441 OverloadedTemplateStorage *Storage = Name.getAsOverloadedTemplate(); 2442 assert(Storage); 2443 return (*Storage->begin())->getDeclName(); 2444} 2445 2446TemplateName ASTContext::getCanonicalTemplateName(TemplateName Name) { 2447 // If this template name refers to a template, the canonical 2448 // template name merely stores the template itself. 2449 if (TemplateDecl *Template = Name.getAsTemplateDecl()) 2450 return TemplateName(cast<TemplateDecl>(Template->getCanonicalDecl())); 2451 2452 assert(!Name.getAsOverloadedTemplate()); 2453 2454 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 2455 assert(DTN && "Non-dependent template names must refer to template decls."); 2456 return DTN->CanonicalTemplateName; 2457} 2458 2459bool ASTContext::hasSameTemplateName(TemplateName X, TemplateName Y) { 2460 X = getCanonicalTemplateName(X); 2461 Y = getCanonicalTemplateName(Y); 2462 return X.getAsVoidPointer() == Y.getAsVoidPointer(); 2463} 2464 2465TemplateArgument 2466ASTContext::getCanonicalTemplateArgument(const TemplateArgument &Arg) { 2467 switch (Arg.getKind()) { 2468 case TemplateArgument::Null: 2469 return Arg; 2470 2471 case TemplateArgument::Expression: 2472 return Arg; 2473 2474 case TemplateArgument::Declaration: 2475 return TemplateArgument(Arg.getAsDecl()->getCanonicalDecl()); 2476 2477 case TemplateArgument::Template: 2478 return TemplateArgument(getCanonicalTemplateName(Arg.getAsTemplate())); 2479 2480 case TemplateArgument::Integral: 2481 return TemplateArgument(*Arg.getAsIntegral(), 2482 getCanonicalType(Arg.getIntegralType())); 2483 2484 case TemplateArgument::Type: 2485 return TemplateArgument(getCanonicalType(Arg.getAsType())); 2486 2487 case TemplateArgument::Pack: { 2488 // FIXME: Allocate in ASTContext 2489 TemplateArgument *CanonArgs = new TemplateArgument[Arg.pack_size()]; 2490 unsigned Idx = 0; 2491 for (TemplateArgument::pack_iterator A = Arg.pack_begin(), 2492 AEnd = Arg.pack_end(); 2493 A != AEnd; (void)++A, ++Idx) 2494 CanonArgs[Idx] = getCanonicalTemplateArgument(*A); 2495 2496 TemplateArgument Result; 2497 Result.setArgumentPack(CanonArgs, Arg.pack_size(), false); 2498 return Result; 2499 } 2500 } 2501 2502 // Silence GCC warning 2503 assert(false && "Unhandled template argument kind"); 2504 return TemplateArgument(); 2505} 2506 2507NestedNameSpecifier * 2508ASTContext::getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) { 2509 if (!NNS) 2510 return 0; 2511 2512 switch (NNS->getKind()) { 2513 case NestedNameSpecifier::Identifier: 2514 // Canonicalize the prefix but keep the identifier the same. 2515 return NestedNameSpecifier::Create(*this, 2516 getCanonicalNestedNameSpecifier(NNS->getPrefix()), 2517 NNS->getAsIdentifier()); 2518 2519 case NestedNameSpecifier::Namespace: 2520 // A namespace is canonical; build a nested-name-specifier with 2521 // this namespace and no prefix. 2522 return NestedNameSpecifier::Create(*this, 0, NNS->getAsNamespace()); 2523 2524 case NestedNameSpecifier::TypeSpec: 2525 case NestedNameSpecifier::TypeSpecWithTemplate: { 2526 QualType T = getCanonicalType(QualType(NNS->getAsType(), 0)); 2527 return NestedNameSpecifier::Create(*this, 0, 2528 NNS->getKind() == NestedNameSpecifier::TypeSpecWithTemplate, 2529 T.getTypePtr()); 2530 } 2531 2532 case NestedNameSpecifier::Global: 2533 // The global specifier is canonical and unique. 2534 return NNS; 2535 } 2536 2537 // Required to silence a GCC warning 2538 return 0; 2539} 2540 2541 2542const ArrayType *ASTContext::getAsArrayType(QualType T) { 2543 // Handle the non-qualified case efficiently. 2544 if (!T.hasLocalQualifiers()) { 2545 // Handle the common positive case fast. 2546 if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 2547 return AT; 2548 } 2549 2550 // Handle the common negative case fast. 2551 QualType CType = T->getCanonicalTypeInternal(); 2552 if (!isa<ArrayType>(CType)) 2553 return 0; 2554 2555 // Apply any qualifiers from the array type to the element type. This 2556 // implements C99 6.7.3p8: "If the specification of an array type includes 2557 // any type qualifiers, the element type is so qualified, not the array type." 2558 2559 // If we get here, we either have type qualifiers on the type, or we have 2560 // sugar such as a typedef in the way. If we have type qualifiers on the type 2561 // we must propagate them down into the element type. 2562 2563 QualifierCollector Qs; 2564 const Type *Ty = Qs.strip(T.getDesugaredType()); 2565 2566 // If we have a simple case, just return now. 2567 const ArrayType *ATy = dyn_cast<ArrayType>(Ty); 2568 if (ATy == 0 || Qs.empty()) 2569 return ATy; 2570 2571 // Otherwise, we have an array and we have qualifiers on it. Push the 2572 // qualifiers into the array element type and return a new array type. 2573 // Get the canonical version of the element with the extra qualifiers on it. 2574 // This can recursively sink qualifiers through multiple levels of arrays. 2575 QualType NewEltTy = getQualifiedType(ATy->getElementType(), Qs); 2576 2577 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy)) 2578 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(), 2579 CAT->getSizeModifier(), 2580 CAT->getIndexTypeCVRQualifiers())); 2581 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy)) 2582 return cast<ArrayType>(getIncompleteArrayType(NewEltTy, 2583 IAT->getSizeModifier(), 2584 IAT->getIndexTypeCVRQualifiers())); 2585 2586 if (const DependentSizedArrayType *DSAT 2587 = dyn_cast<DependentSizedArrayType>(ATy)) 2588 return cast<ArrayType>( 2589 getDependentSizedArrayType(NewEltTy, 2590 DSAT->getSizeExpr() ? 2591 DSAT->getSizeExpr()->Retain() : 0, 2592 DSAT->getSizeModifier(), 2593 DSAT->getIndexTypeCVRQualifiers(), 2594 DSAT->getBracketsRange())); 2595 2596 const VariableArrayType *VAT = cast<VariableArrayType>(ATy); 2597 return cast<ArrayType>(getVariableArrayType(NewEltTy, 2598 VAT->getSizeExpr() ? 2599 VAT->getSizeExpr()->Retain() : 0, 2600 VAT->getSizeModifier(), 2601 VAT->getIndexTypeCVRQualifiers(), 2602 VAT->getBracketsRange())); 2603} 2604 2605 2606/// getArrayDecayedType - Return the properly qualified result of decaying the 2607/// specified array type to a pointer. This operation is non-trivial when 2608/// handling typedefs etc. The canonical type of "T" must be an array type, 2609/// this returns a pointer to a properly qualified element of the array. 2610/// 2611/// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 2612QualType ASTContext::getArrayDecayedType(QualType Ty) { 2613 // Get the element type with 'getAsArrayType' so that we don't lose any 2614 // typedefs in the element type of the array. This also handles propagation 2615 // of type qualifiers from the array type into the element type if present 2616 // (C99 6.7.3p8). 2617 const ArrayType *PrettyArrayType = getAsArrayType(Ty); 2618 assert(PrettyArrayType && "Not an array type!"); 2619 2620 QualType PtrTy = getPointerType(PrettyArrayType->getElementType()); 2621 2622 // int x[restrict 4] -> int *restrict 2623 return getQualifiedType(PtrTy, PrettyArrayType->getIndexTypeQualifiers()); 2624} 2625 2626QualType ASTContext::getBaseElementType(QualType QT) { 2627 QualifierCollector Qs; 2628 while (true) { 2629 const Type *UT = Qs.strip(QT); 2630 if (const ArrayType *AT = getAsArrayType(QualType(UT,0))) { 2631 QT = AT->getElementType(); 2632 } else { 2633 return Qs.apply(QT); 2634 } 2635 } 2636} 2637 2638QualType ASTContext::getBaseElementType(const ArrayType *AT) { 2639 QualType ElemTy = AT->getElementType(); 2640 2641 if (const ArrayType *AT = getAsArrayType(ElemTy)) 2642 return getBaseElementType(AT); 2643 2644 return ElemTy; 2645} 2646 2647/// getConstantArrayElementCount - Returns number of constant array elements. 2648uint64_t 2649ASTContext::getConstantArrayElementCount(const ConstantArrayType *CA) const { 2650 uint64_t ElementCount = 1; 2651 do { 2652 ElementCount *= CA->getSize().getZExtValue(); 2653 CA = dyn_cast<ConstantArrayType>(CA->getElementType()); 2654 } while (CA); 2655 return ElementCount; 2656} 2657 2658/// getFloatingRank - Return a relative rank for floating point types. 2659/// This routine will assert if passed a built-in type that isn't a float. 2660static FloatingRank getFloatingRank(QualType T) { 2661 if (const ComplexType *CT = T->getAs<ComplexType>()) 2662 return getFloatingRank(CT->getElementType()); 2663 2664 assert(T->getAs<BuiltinType>() && "getFloatingRank(): not a floating type"); 2665 switch (T->getAs<BuiltinType>()->getKind()) { 2666 default: assert(0 && "getFloatingRank(): not a floating type"); 2667 case BuiltinType::Float: return FloatRank; 2668 case BuiltinType::Double: return DoubleRank; 2669 case BuiltinType::LongDouble: return LongDoubleRank; 2670 } 2671} 2672 2673/// getFloatingTypeOfSizeWithinDomain - Returns a real floating 2674/// point or a complex type (based on typeDomain/typeSize). 2675/// 'typeDomain' is a real floating point or complex type. 2676/// 'typeSize' is a real floating point or complex type. 2677QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size, 2678 QualType Domain) const { 2679 FloatingRank EltRank = getFloatingRank(Size); 2680 if (Domain->isComplexType()) { 2681 switch (EltRank) { 2682 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2683 case FloatRank: return FloatComplexTy; 2684 case DoubleRank: return DoubleComplexTy; 2685 case LongDoubleRank: return LongDoubleComplexTy; 2686 } 2687 } 2688 2689 assert(Domain->isRealFloatingType() && "Unknown domain!"); 2690 switch (EltRank) { 2691 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2692 case FloatRank: return FloatTy; 2693 case DoubleRank: return DoubleTy; 2694 case LongDoubleRank: return LongDoubleTy; 2695 } 2696} 2697 2698/// getFloatingTypeOrder - Compare the rank of the two specified floating 2699/// point types, ignoring the domain of the type (i.e. 'double' == 2700/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 2701/// LHS < RHS, return -1. 2702int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) { 2703 FloatingRank LHSR = getFloatingRank(LHS); 2704 FloatingRank RHSR = getFloatingRank(RHS); 2705 2706 if (LHSR == RHSR) 2707 return 0; 2708 if (LHSR > RHSR) 2709 return 1; 2710 return -1; 2711} 2712 2713/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This 2714/// routine will assert if passed a built-in type that isn't an integer or enum, 2715/// or if it is not canonicalized. 2716unsigned ASTContext::getIntegerRank(Type *T) { 2717 assert(T->isCanonicalUnqualified() && "T should be canonicalized"); 2718 if (EnumType* ET = dyn_cast<EnumType>(T)) 2719 T = ET->getDecl()->getPromotionType().getTypePtr(); 2720 2721 if (T->isSpecificBuiltinType(BuiltinType::WChar)) 2722 T = getFromTargetType(Target.getWCharType()).getTypePtr(); 2723 2724 if (T->isSpecificBuiltinType(BuiltinType::Char16)) 2725 T = getFromTargetType(Target.getChar16Type()).getTypePtr(); 2726 2727 if (T->isSpecificBuiltinType(BuiltinType::Char32)) 2728 T = getFromTargetType(Target.getChar32Type()).getTypePtr(); 2729 2730 switch (cast<BuiltinType>(T)->getKind()) { 2731 default: assert(0 && "getIntegerRank(): not a built-in integer"); 2732 case BuiltinType::Bool: 2733 return 1 + (getIntWidth(BoolTy) << 3); 2734 case BuiltinType::Char_S: 2735 case BuiltinType::Char_U: 2736 case BuiltinType::SChar: 2737 case BuiltinType::UChar: 2738 return 2 + (getIntWidth(CharTy) << 3); 2739 case BuiltinType::Short: 2740 case BuiltinType::UShort: 2741 return 3 + (getIntWidth(ShortTy) << 3); 2742 case BuiltinType::Int: 2743 case BuiltinType::UInt: 2744 return 4 + (getIntWidth(IntTy) << 3); 2745 case BuiltinType::Long: 2746 case BuiltinType::ULong: 2747 return 5 + (getIntWidth(LongTy) << 3); 2748 case BuiltinType::LongLong: 2749 case BuiltinType::ULongLong: 2750 return 6 + (getIntWidth(LongLongTy) << 3); 2751 case BuiltinType::Int128: 2752 case BuiltinType::UInt128: 2753 return 7 + (getIntWidth(Int128Ty) << 3); 2754 } 2755} 2756 2757/// \brief Whether this is a promotable bitfield reference according 2758/// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 2759/// 2760/// \returns the type this bit-field will promote to, or NULL if no 2761/// promotion occurs. 2762QualType ASTContext::isPromotableBitField(Expr *E) { 2763 FieldDecl *Field = E->getBitField(); 2764 if (!Field) 2765 return QualType(); 2766 2767 QualType FT = Field->getType(); 2768 2769 llvm::APSInt BitWidthAP = Field->getBitWidth()->EvaluateAsInt(*this); 2770 uint64_t BitWidth = BitWidthAP.getZExtValue(); 2771 uint64_t IntSize = getTypeSize(IntTy); 2772 // GCC extension compatibility: if the bit-field size is less than or equal 2773 // to the size of int, it gets promoted no matter what its type is. 2774 // For instance, unsigned long bf : 4 gets promoted to signed int. 2775 if (BitWidth < IntSize) 2776 return IntTy; 2777 2778 if (BitWidth == IntSize) 2779 return FT->isSignedIntegerType() ? IntTy : UnsignedIntTy; 2780 2781 // Types bigger than int are not subject to promotions, and therefore act 2782 // like the base type. 2783 // FIXME: This doesn't quite match what gcc does, but what gcc does here 2784 // is ridiculous. 2785 return QualType(); 2786} 2787 2788/// getPromotedIntegerType - Returns the type that Promotable will 2789/// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 2790/// integer type. 2791QualType ASTContext::getPromotedIntegerType(QualType Promotable) { 2792 assert(!Promotable.isNull()); 2793 assert(Promotable->isPromotableIntegerType()); 2794 if (const EnumType *ET = Promotable->getAs<EnumType>()) 2795 return ET->getDecl()->getPromotionType(); 2796 if (Promotable->isSignedIntegerType()) 2797 return IntTy; 2798 uint64_t PromotableSize = getTypeSize(Promotable); 2799 uint64_t IntSize = getTypeSize(IntTy); 2800 assert(Promotable->isUnsignedIntegerType() && PromotableSize <= IntSize); 2801 return (PromotableSize != IntSize) ? IntTy : UnsignedIntTy; 2802} 2803 2804/// getIntegerTypeOrder - Returns the highest ranked integer type: 2805/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 2806/// LHS < RHS, return -1. 2807int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) { 2808 Type *LHSC = getCanonicalType(LHS).getTypePtr(); 2809 Type *RHSC = getCanonicalType(RHS).getTypePtr(); 2810 if (LHSC == RHSC) return 0; 2811 2812 bool LHSUnsigned = LHSC->isUnsignedIntegerType(); 2813 bool RHSUnsigned = RHSC->isUnsignedIntegerType(); 2814 2815 unsigned LHSRank = getIntegerRank(LHSC); 2816 unsigned RHSRank = getIntegerRank(RHSC); 2817 2818 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned. 2819 if (LHSRank == RHSRank) return 0; 2820 return LHSRank > RHSRank ? 1 : -1; 2821 } 2822 2823 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa. 2824 if (LHSUnsigned) { 2825 // If the unsigned [LHS] type is larger, return it. 2826 if (LHSRank >= RHSRank) 2827 return 1; 2828 2829 // If the signed type can represent all values of the unsigned type, it 2830 // wins. Because we are dealing with 2's complement and types that are 2831 // powers of two larger than each other, this is always safe. 2832 return -1; 2833 } 2834 2835 // If the unsigned [RHS] type is larger, return it. 2836 if (RHSRank >= LHSRank) 2837 return -1; 2838 2839 // If the signed type can represent all values of the unsigned type, it 2840 // wins. Because we are dealing with 2's complement and types that are 2841 // powers of two larger than each other, this is always safe. 2842 return 1; 2843} 2844 2845static RecordDecl * 2846CreateRecordDecl(ASTContext &Ctx, RecordDecl::TagKind TK, DeclContext *DC, 2847 SourceLocation L, IdentifierInfo *Id) { 2848 if (Ctx.getLangOptions().CPlusPlus) 2849 return CXXRecordDecl::Create(Ctx, TK, DC, L, Id); 2850 else 2851 return RecordDecl::Create(Ctx, TK, DC, L, Id); 2852} 2853 2854// getCFConstantStringType - Return the type used for constant CFStrings. 2855QualType ASTContext::getCFConstantStringType() { 2856 if (!CFConstantStringTypeDecl) { 2857 CFConstantStringTypeDecl = 2858 CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 2859 &Idents.get("NSConstantString")); 2860 CFConstantStringTypeDecl->startDefinition(); 2861 2862 QualType FieldTypes[4]; 2863 2864 // const int *isa; 2865 FieldTypes[0] = getPointerType(IntTy.withConst()); 2866 // int flags; 2867 FieldTypes[1] = IntTy; 2868 // const char *str; 2869 FieldTypes[2] = getPointerType(CharTy.withConst()); 2870 // long length; 2871 FieldTypes[3] = LongTy; 2872 2873 // Create fields 2874 for (unsigned i = 0; i < 4; ++i) { 2875 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl, 2876 SourceLocation(), 0, 2877 FieldTypes[i], /*TInfo=*/0, 2878 /*BitWidth=*/0, 2879 /*Mutable=*/false); 2880 CFConstantStringTypeDecl->addDecl(Field); 2881 } 2882 2883 CFConstantStringTypeDecl->completeDefinition(); 2884 } 2885 2886 return getTagDeclType(CFConstantStringTypeDecl); 2887} 2888 2889void ASTContext::setCFConstantStringType(QualType T) { 2890 const RecordType *Rec = T->getAs<RecordType>(); 2891 assert(Rec && "Invalid CFConstantStringType"); 2892 CFConstantStringTypeDecl = Rec->getDecl(); 2893} 2894 2895QualType ASTContext::getObjCFastEnumerationStateType() { 2896 if (!ObjCFastEnumerationStateTypeDecl) { 2897 ObjCFastEnumerationStateTypeDecl = 2898 CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 2899 &Idents.get("__objcFastEnumerationState")); 2900 ObjCFastEnumerationStateTypeDecl->startDefinition(); 2901 2902 QualType FieldTypes[] = { 2903 UnsignedLongTy, 2904 getPointerType(ObjCIdTypedefType), 2905 getPointerType(UnsignedLongTy), 2906 getConstantArrayType(UnsignedLongTy, 2907 llvm::APInt(32, 5), ArrayType::Normal, 0) 2908 }; 2909 2910 for (size_t i = 0; i < 4; ++i) { 2911 FieldDecl *Field = FieldDecl::Create(*this, 2912 ObjCFastEnumerationStateTypeDecl, 2913 SourceLocation(), 0, 2914 FieldTypes[i], /*TInfo=*/0, 2915 /*BitWidth=*/0, 2916 /*Mutable=*/false); 2917 ObjCFastEnumerationStateTypeDecl->addDecl(Field); 2918 } 2919 2920 ObjCFastEnumerationStateTypeDecl->completeDefinition(); 2921 } 2922 2923 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 2924} 2925 2926QualType ASTContext::getBlockDescriptorType() { 2927 if (BlockDescriptorType) 2928 return getTagDeclType(BlockDescriptorType); 2929 2930 RecordDecl *T; 2931 // FIXME: Needs the FlagAppleBlock bit. 2932 T = CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 2933 &Idents.get("__block_descriptor")); 2934 T->startDefinition(); 2935 2936 QualType FieldTypes[] = { 2937 UnsignedLongTy, 2938 UnsignedLongTy, 2939 }; 2940 2941 const char *FieldNames[] = { 2942 "reserved", 2943 "Size" 2944 }; 2945 2946 for (size_t i = 0; i < 2; ++i) { 2947 FieldDecl *Field = FieldDecl::Create(*this, 2948 T, 2949 SourceLocation(), 2950 &Idents.get(FieldNames[i]), 2951 FieldTypes[i], /*TInfo=*/0, 2952 /*BitWidth=*/0, 2953 /*Mutable=*/false); 2954 T->addDecl(Field); 2955 } 2956 2957 T->completeDefinition(); 2958 2959 BlockDescriptorType = T; 2960 2961 return getTagDeclType(BlockDescriptorType); 2962} 2963 2964void ASTContext::setBlockDescriptorType(QualType T) { 2965 const RecordType *Rec = T->getAs<RecordType>(); 2966 assert(Rec && "Invalid BlockDescriptorType"); 2967 BlockDescriptorType = Rec->getDecl(); 2968} 2969 2970QualType ASTContext::getBlockDescriptorExtendedType() { 2971 if (BlockDescriptorExtendedType) 2972 return getTagDeclType(BlockDescriptorExtendedType); 2973 2974 RecordDecl *T; 2975 // FIXME: Needs the FlagAppleBlock bit. 2976 T = CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 2977 &Idents.get("__block_descriptor_withcopydispose")); 2978 T->startDefinition(); 2979 2980 QualType FieldTypes[] = { 2981 UnsignedLongTy, 2982 UnsignedLongTy, 2983 getPointerType(VoidPtrTy), 2984 getPointerType(VoidPtrTy) 2985 }; 2986 2987 const char *FieldNames[] = { 2988 "reserved", 2989 "Size", 2990 "CopyFuncPtr", 2991 "DestroyFuncPtr" 2992 }; 2993 2994 for (size_t i = 0; i < 4; ++i) { 2995 FieldDecl *Field = FieldDecl::Create(*this, 2996 T, 2997 SourceLocation(), 2998 &Idents.get(FieldNames[i]), 2999 FieldTypes[i], /*TInfo=*/0, 3000 /*BitWidth=*/0, 3001 /*Mutable=*/false); 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 T->addDecl(Field); 3080 } 3081 3082 T->completeDefinition(); 3083 3084 return getPointerType(getTagDeclType(T)); 3085} 3086 3087 3088QualType ASTContext::getBlockParmType( 3089 bool BlockHasCopyDispose, 3090 llvm::SmallVector<const Expr *, 8> &BlockDeclRefDecls) { 3091 // FIXME: Move up 3092 static unsigned int UniqueBlockParmTypeID = 0; 3093 llvm::SmallString<36> Name; 3094 llvm::raw_svector_ostream(Name) << "__block_literal_" 3095 << ++UniqueBlockParmTypeID; 3096 RecordDecl *T; 3097 T = CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 3098 &Idents.get(Name.str())); 3099 T->startDefinition(); 3100 QualType FieldTypes[] = { 3101 getPointerType(VoidPtrTy), 3102 IntTy, 3103 IntTy, 3104 getPointerType(VoidPtrTy), 3105 (BlockHasCopyDispose ? 3106 getPointerType(getBlockDescriptorExtendedType()) : 3107 getPointerType(getBlockDescriptorType())) 3108 }; 3109 3110 const char *FieldNames[] = { 3111 "__isa", 3112 "__flags", 3113 "__reserved", 3114 "__FuncPtr", 3115 "__descriptor" 3116 }; 3117 3118 for (size_t i = 0; i < 5; ++i) { 3119 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3120 &Idents.get(FieldNames[i]), 3121 FieldTypes[i], /*TInfo=*/0, 3122 /*BitWidth=*/0, /*Mutable=*/false); 3123 T->addDecl(Field); 3124 } 3125 3126 for (size_t i = 0; i < BlockDeclRefDecls.size(); ++i) { 3127 const Expr *E = BlockDeclRefDecls[i]; 3128 const BlockDeclRefExpr *BDRE = dyn_cast<BlockDeclRefExpr>(E); 3129 clang::IdentifierInfo *Name = 0; 3130 if (BDRE) { 3131 const ValueDecl *D = BDRE->getDecl(); 3132 Name = &Idents.get(D->getName()); 3133 } 3134 QualType FieldType = E->getType(); 3135 3136 if (BDRE && BDRE->isByRef()) 3137 FieldType = BuildByRefType(BDRE->getDecl()->getNameAsCString(), 3138 FieldType); 3139 3140 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3141 Name, FieldType, /*TInfo=*/0, 3142 /*BitWidth=*/0, /*Mutable=*/false); 3143 T->addDecl(Field); 3144 } 3145 3146 T->completeDefinition(); 3147 3148 return getPointerType(getTagDeclType(T)); 3149} 3150 3151void ASTContext::setObjCFastEnumerationStateType(QualType T) { 3152 const RecordType *Rec = T->getAs<RecordType>(); 3153 assert(Rec && "Invalid ObjCFAstEnumerationStateType"); 3154 ObjCFastEnumerationStateTypeDecl = Rec->getDecl(); 3155} 3156 3157// This returns true if a type has been typedefed to BOOL: 3158// typedef <type> BOOL; 3159static bool isTypeTypedefedAsBOOL(QualType T) { 3160 if (const TypedefType *TT = dyn_cast<TypedefType>(T)) 3161 if (IdentifierInfo *II = TT->getDecl()->getIdentifier()) 3162 return II->isStr("BOOL"); 3163 3164 return false; 3165} 3166 3167/// getObjCEncodingTypeSize returns size of type for objective-c encoding 3168/// purpose. 3169CharUnits ASTContext::getObjCEncodingTypeSize(QualType type) { 3170 CharUnits sz = getTypeSizeInChars(type); 3171 3172 // Make all integer and enum types at least as large as an int 3173 if (sz.isPositive() && type->isIntegralType()) 3174 sz = std::max(sz, getTypeSizeInChars(IntTy)); 3175 // Treat arrays as pointers, since that's how they're passed in. 3176 else if (type->isArrayType()) 3177 sz = getTypeSizeInChars(VoidPtrTy); 3178 return sz; 3179} 3180 3181static inline 3182std::string charUnitsToString(const CharUnits &CU) { 3183 return llvm::itostr(CU.getQuantity()); 3184} 3185 3186/// getObjCEncodingForBlockDecl - Return the encoded type for this method 3187/// declaration. 3188void ASTContext::getObjCEncodingForBlock(const BlockExpr *Expr, 3189 std::string& S) { 3190 const BlockDecl *Decl = Expr->getBlockDecl(); 3191 QualType BlockTy = 3192 Expr->getType()->getAs<BlockPointerType>()->getPointeeType(); 3193 // Encode result type. 3194 getObjCEncodingForType(cast<FunctionType>(BlockTy)->getResultType(), S); 3195 // Compute size of all parameters. 3196 // Start with computing size of a pointer in number of bytes. 3197 // FIXME: There might(should) be a better way of doing this computation! 3198 SourceLocation Loc; 3199 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3200 CharUnits ParmOffset = PtrSize; 3201 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3202 E = Decl->param_end(); PI != E; ++PI) { 3203 QualType PType = (*PI)->getType(); 3204 CharUnits sz = getObjCEncodingTypeSize(PType); 3205 assert (sz.isPositive() && "BlockExpr - Incomplete param type"); 3206 ParmOffset += sz; 3207 } 3208 // Size of the argument frame 3209 S += charUnitsToString(ParmOffset); 3210 // Block pointer and offset. 3211 S += "@?0"; 3212 ParmOffset = PtrSize; 3213 3214 // Argument types. 3215 ParmOffset = PtrSize; 3216 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), E = 3217 Decl->param_end(); PI != E; ++PI) { 3218 ParmVarDecl *PVDecl = *PI; 3219 QualType PType = PVDecl->getOriginalType(); 3220 if (const ArrayType *AT = 3221 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3222 // Use array's original type only if it has known number of 3223 // elements. 3224 if (!isa<ConstantArrayType>(AT)) 3225 PType = PVDecl->getType(); 3226 } else if (PType->isFunctionType()) 3227 PType = PVDecl->getType(); 3228 getObjCEncodingForType(PType, S); 3229 S += charUnitsToString(ParmOffset); 3230 ParmOffset += getObjCEncodingTypeSize(PType); 3231 } 3232} 3233 3234/// getObjCEncodingForMethodDecl - Return the encoded type for this method 3235/// declaration. 3236void ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, 3237 std::string& S) { 3238 // FIXME: This is not very efficient. 3239 // Encode type qualifer, 'in', 'inout', etc. for the return type. 3240 getObjCEncodingForTypeQualifier(Decl->getObjCDeclQualifier(), S); 3241 // Encode result type. 3242 getObjCEncodingForType(Decl->getResultType(), S); 3243 // Compute size of all parameters. 3244 // Start with computing size of a pointer in number of bytes. 3245 // FIXME: There might(should) be a better way of doing this computation! 3246 SourceLocation Loc; 3247 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3248 // The first two arguments (self and _cmd) are pointers; account for 3249 // their size. 3250 CharUnits ParmOffset = 2 * PtrSize; 3251 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3252 E = Decl->param_end(); PI != E; ++PI) { 3253 QualType PType = (*PI)->getType(); 3254 CharUnits sz = getObjCEncodingTypeSize(PType); 3255 assert (sz.isPositive() && 3256 "getObjCEncodingForMethodDecl - Incomplete param type"); 3257 ParmOffset += sz; 3258 } 3259 S += charUnitsToString(ParmOffset); 3260 S += "@0:"; 3261 S += charUnitsToString(PtrSize); 3262 3263 // Argument types. 3264 ParmOffset = 2 * PtrSize; 3265 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3266 E = Decl->param_end(); PI != E; ++PI) { 3267 ParmVarDecl *PVDecl = *PI; 3268 QualType PType = PVDecl->getOriginalType(); 3269 if (const ArrayType *AT = 3270 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3271 // Use array's original type only if it has known number of 3272 // elements. 3273 if (!isa<ConstantArrayType>(AT)) 3274 PType = PVDecl->getType(); 3275 } else if (PType->isFunctionType()) 3276 PType = PVDecl->getType(); 3277 // Process argument qualifiers for user supplied arguments; such as, 3278 // 'in', 'inout', etc. 3279 getObjCEncodingForTypeQualifier(PVDecl->getObjCDeclQualifier(), S); 3280 getObjCEncodingForType(PType, S); 3281 S += charUnitsToString(ParmOffset); 3282 ParmOffset += getObjCEncodingTypeSize(PType); 3283 } 3284} 3285 3286/// getObjCEncodingForPropertyDecl - Return the encoded type for this 3287/// property declaration. If non-NULL, Container must be either an 3288/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be 3289/// NULL when getting encodings for protocol properties. 3290/// Property attributes are stored as a comma-delimited C string. The simple 3291/// attributes readonly and bycopy are encoded as single characters. The 3292/// parametrized attributes, getter=name, setter=name, and ivar=name, are 3293/// encoded as single characters, followed by an identifier. Property types 3294/// are also encoded as a parametrized attribute. The characters used to encode 3295/// these attributes are defined by the following enumeration: 3296/// @code 3297/// enum PropertyAttributes { 3298/// kPropertyReadOnly = 'R', // property is read-only. 3299/// kPropertyBycopy = 'C', // property is a copy of the value last assigned 3300/// kPropertyByref = '&', // property is a reference to the value last assigned 3301/// kPropertyDynamic = 'D', // property is dynamic 3302/// kPropertyGetter = 'G', // followed by getter selector name 3303/// kPropertySetter = 'S', // followed by setter selector name 3304/// kPropertyInstanceVariable = 'V' // followed by instance variable name 3305/// kPropertyType = 't' // followed by old-style type encoding. 3306/// kPropertyWeak = 'W' // 'weak' property 3307/// kPropertyStrong = 'P' // property GC'able 3308/// kPropertyNonAtomic = 'N' // property non-atomic 3309/// }; 3310/// @endcode 3311void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 3312 const Decl *Container, 3313 std::string& S) { 3314 // Collect information from the property implementation decl(s). 3315 bool Dynamic = false; 3316 ObjCPropertyImplDecl *SynthesizePID = 0; 3317 3318 // FIXME: Duplicated code due to poor abstraction. 3319 if (Container) { 3320 if (const ObjCCategoryImplDecl *CID = 3321 dyn_cast<ObjCCategoryImplDecl>(Container)) { 3322 for (ObjCCategoryImplDecl::propimpl_iterator 3323 i = CID->propimpl_begin(), e = CID->propimpl_end(); 3324 i != e; ++i) { 3325 ObjCPropertyImplDecl *PID = *i; 3326 if (PID->getPropertyDecl() == PD) { 3327 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3328 Dynamic = true; 3329 } else { 3330 SynthesizePID = PID; 3331 } 3332 } 3333 } 3334 } else { 3335 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container); 3336 for (ObjCCategoryImplDecl::propimpl_iterator 3337 i = OID->propimpl_begin(), e = OID->propimpl_end(); 3338 i != e; ++i) { 3339 ObjCPropertyImplDecl *PID = *i; 3340 if (PID->getPropertyDecl() == PD) { 3341 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3342 Dynamic = true; 3343 } else { 3344 SynthesizePID = PID; 3345 } 3346 } 3347 } 3348 } 3349 } 3350 3351 // FIXME: This is not very efficient. 3352 S = "T"; 3353 3354 // Encode result type. 3355 // GCC has some special rules regarding encoding of properties which 3356 // closely resembles encoding of ivars. 3357 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, 0, 3358 true /* outermost type */, 3359 true /* encoding for property */); 3360 3361 if (PD->isReadOnly()) { 3362 S += ",R"; 3363 } else { 3364 switch (PD->getSetterKind()) { 3365 case ObjCPropertyDecl::Assign: break; 3366 case ObjCPropertyDecl::Copy: S += ",C"; break; 3367 case ObjCPropertyDecl::Retain: S += ",&"; break; 3368 } 3369 } 3370 3371 // It really isn't clear at all what this means, since properties 3372 // are "dynamic by default". 3373 if (Dynamic) 3374 S += ",D"; 3375 3376 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) 3377 S += ",N"; 3378 3379 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) { 3380 S += ",G"; 3381 S += PD->getGetterName().getAsString(); 3382 } 3383 3384 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) { 3385 S += ",S"; 3386 S += PD->getSetterName().getAsString(); 3387 } 3388 3389 if (SynthesizePID) { 3390 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl(); 3391 S += ",V"; 3392 S += OID->getNameAsString(); 3393 } 3394 3395 // FIXME: OBJCGC: weak & strong 3396} 3397 3398/// getLegacyIntegralTypeEncoding - 3399/// Another legacy compatibility encoding: 32-bit longs are encoded as 3400/// 'l' or 'L' , but not always. For typedefs, we need to use 3401/// 'i' or 'I' instead if encoding a struct field, or a pointer! 3402/// 3403void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const { 3404 if (isa<TypedefType>(PointeeTy.getTypePtr())) { 3405 if (const BuiltinType *BT = PointeeTy->getAs<BuiltinType>()) { 3406 if (BT->getKind() == BuiltinType::ULong && 3407 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3408 PointeeTy = UnsignedIntTy; 3409 else 3410 if (BT->getKind() == BuiltinType::Long && 3411 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3412 PointeeTy = IntTy; 3413 } 3414 } 3415} 3416 3417void ASTContext::getObjCEncodingForType(QualType T, std::string& S, 3418 const FieldDecl *Field) { 3419 // We follow the behavior of gcc, expanding structures which are 3420 // directly pointed to, and expanding embedded structures. Note that 3421 // these rules are sufficient to prevent recursive encoding of the 3422 // same type. 3423 getObjCEncodingForTypeImpl(T, S, true, true, Field, 3424 true /* outermost type */); 3425} 3426 3427static void EncodeBitField(const ASTContext *Context, std::string& S, 3428 const FieldDecl *FD) { 3429 const Expr *E = FD->getBitWidth(); 3430 assert(E && "bitfield width not there - getObjCEncodingForTypeImpl"); 3431 ASTContext *Ctx = const_cast<ASTContext*>(Context); 3432 unsigned N = E->EvaluateAsInt(*Ctx).getZExtValue(); 3433 S += 'b'; 3434 S += llvm::utostr(N); 3435} 3436 3437// FIXME: Use SmallString for accumulating string. 3438void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S, 3439 bool ExpandPointedToStructures, 3440 bool ExpandStructures, 3441 const FieldDecl *FD, 3442 bool OutermostType, 3443 bool EncodingProperty) { 3444 if (const BuiltinType *BT = T->getAs<BuiltinType>()) { 3445 if (FD && FD->isBitField()) 3446 return EncodeBitField(this, S, FD); 3447 char encoding; 3448 switch (BT->getKind()) { 3449 default: assert(0 && "Unhandled builtin type kind"); 3450 case BuiltinType::Void: encoding = 'v'; break; 3451 case BuiltinType::Bool: encoding = 'B'; break; 3452 case BuiltinType::Char_U: 3453 case BuiltinType::UChar: encoding = 'C'; break; 3454 case BuiltinType::UShort: encoding = 'S'; break; 3455 case BuiltinType::UInt: encoding = 'I'; break; 3456 case BuiltinType::ULong: 3457 encoding = 3458 (const_cast<ASTContext *>(this))->getIntWidth(T) == 32 ? 'L' : 'Q'; 3459 break; 3460 case BuiltinType::UInt128: encoding = 'T'; break; 3461 case BuiltinType::ULongLong: encoding = 'Q'; break; 3462 case BuiltinType::Char_S: 3463 case BuiltinType::SChar: encoding = 'c'; break; 3464 case BuiltinType::Short: encoding = 's'; break; 3465 case BuiltinType::Int: encoding = 'i'; break; 3466 case BuiltinType::Long: 3467 encoding = 3468 (const_cast<ASTContext *>(this))->getIntWidth(T) == 32 ? 'l' : 'q'; 3469 break; 3470 case BuiltinType::LongLong: encoding = 'q'; break; 3471 case BuiltinType::Int128: encoding = 't'; break; 3472 case BuiltinType::Float: encoding = 'f'; break; 3473 case BuiltinType::Double: encoding = 'd'; break; 3474 case BuiltinType::LongDouble: encoding = 'd'; break; 3475 } 3476 3477 S += encoding; 3478 return; 3479 } 3480 3481 if (const ComplexType *CT = T->getAs<ComplexType>()) { 3482 S += 'j'; 3483 getObjCEncodingForTypeImpl(CT->getElementType(), S, false, false, 0, false, 3484 false); 3485 return; 3486 } 3487 3488 if (const PointerType *PT = T->getAs<PointerType>()) { 3489 if (PT->isObjCSelType()) { 3490 S += ':'; 3491 return; 3492 } 3493 QualType PointeeTy = PT->getPointeeType(); 3494 3495 bool isReadOnly = false; 3496 // For historical/compatibility reasons, the read-only qualifier of the 3497 // pointee gets emitted _before_ the '^'. The read-only qualifier of 3498 // the pointer itself gets ignored, _unless_ we are looking at a typedef! 3499 // Also, do not emit the 'r' for anything but the outermost type! 3500 if (isa<TypedefType>(T.getTypePtr())) { 3501 if (OutermostType && T.isConstQualified()) { 3502 isReadOnly = true; 3503 S += 'r'; 3504 } 3505 } else if (OutermostType) { 3506 QualType P = PointeeTy; 3507 while (P->getAs<PointerType>()) 3508 P = P->getAs<PointerType>()->getPointeeType(); 3509 if (P.isConstQualified()) { 3510 isReadOnly = true; 3511 S += 'r'; 3512 } 3513 } 3514 if (isReadOnly) { 3515 // Another legacy compatibility encoding. Some ObjC qualifier and type 3516 // combinations need to be rearranged. 3517 // Rewrite "in const" from "nr" to "rn" 3518 const char * s = S.c_str(); 3519 int len = S.length(); 3520 if (len >= 2 && s[len-2] == 'n' && s[len-1] == 'r') { 3521 std::string replace = "rn"; 3522 S.replace(S.end()-2, S.end(), replace); 3523 } 3524 } 3525 3526 if (PointeeTy->isCharType()) { 3527 // char pointer types should be encoded as '*' unless it is a 3528 // type that has been typedef'd to 'BOOL'. 3529 if (!isTypeTypedefedAsBOOL(PointeeTy)) { 3530 S += '*'; 3531 return; 3532 } 3533 } else if (const RecordType *RTy = PointeeTy->getAs<RecordType>()) { 3534 // GCC binary compat: Need to convert "struct objc_class *" to "#". 3535 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_class")) { 3536 S += '#'; 3537 return; 3538 } 3539 // GCC binary compat: Need to convert "struct objc_object *" to "@". 3540 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_object")) { 3541 S += '@'; 3542 return; 3543 } 3544 // fall through... 3545 } 3546 S += '^'; 3547 getLegacyIntegralTypeEncoding(PointeeTy); 3548 3549 getObjCEncodingForTypeImpl(PointeeTy, S, false, ExpandPointedToStructures, 3550 NULL); 3551 return; 3552 } 3553 3554 if (const ArrayType *AT = 3555 // Ignore type qualifiers etc. 3556 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) { 3557 if (isa<IncompleteArrayType>(AT)) { 3558 // Incomplete arrays are encoded as a pointer to the array element. 3559 S += '^'; 3560 3561 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3562 false, ExpandStructures, FD); 3563 } else { 3564 S += '['; 3565 3566 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 3567 S += llvm::utostr(CAT->getSize().getZExtValue()); 3568 else { 3569 //Variable length arrays are encoded as a regular array with 0 elements. 3570 assert(isa<VariableArrayType>(AT) && "Unknown array type!"); 3571 S += '0'; 3572 } 3573 3574 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3575 false, ExpandStructures, FD); 3576 S += ']'; 3577 } 3578 return; 3579 } 3580 3581 if (T->getAs<FunctionType>()) { 3582 S += '?'; 3583 return; 3584 } 3585 3586 if (const RecordType *RTy = T->getAs<RecordType>()) { 3587 RecordDecl *RDecl = RTy->getDecl(); 3588 S += RDecl->isUnion() ? '(' : '{'; 3589 // Anonymous structures print as '?' 3590 if (const IdentifierInfo *II = RDecl->getIdentifier()) { 3591 S += II->getName(); 3592 } else { 3593 S += '?'; 3594 } 3595 if (ExpandStructures) { 3596 S += '='; 3597 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 3598 FieldEnd = RDecl->field_end(); 3599 Field != FieldEnd; ++Field) { 3600 if (FD) { 3601 S += '"'; 3602 S += Field->getNameAsString(); 3603 S += '"'; 3604 } 3605 3606 // Special case bit-fields. 3607 if (Field->isBitField()) { 3608 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, 3609 (*Field)); 3610 } else { 3611 QualType qt = Field->getType(); 3612 getLegacyIntegralTypeEncoding(qt); 3613 getObjCEncodingForTypeImpl(qt, S, false, true, 3614 FD); 3615 } 3616 } 3617 } 3618 S += RDecl->isUnion() ? ')' : '}'; 3619 return; 3620 } 3621 3622 if (T->isEnumeralType()) { 3623 if (FD && FD->isBitField()) 3624 EncodeBitField(this, S, FD); 3625 else 3626 S += 'i'; 3627 return; 3628 } 3629 3630 if (T->isBlockPointerType()) { 3631 S += "@?"; // Unlike a pointer-to-function, which is "^?". 3632 return; 3633 } 3634 3635 if (const ObjCInterfaceType *OIT = T->getAs<ObjCInterfaceType>()) { 3636 // @encode(class_name) 3637 ObjCInterfaceDecl *OI = OIT->getDecl(); 3638 S += '{'; 3639 const IdentifierInfo *II = OI->getIdentifier(); 3640 S += II->getName(); 3641 S += '='; 3642 llvm::SmallVector<FieldDecl*, 32> RecFields; 3643 CollectObjCIvars(OI, RecFields); 3644 for (unsigned i = 0, e = RecFields.size(); i != e; ++i) { 3645 if (RecFields[i]->isBitField()) 3646 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 3647 RecFields[i]); 3648 else 3649 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 3650 FD); 3651 } 3652 S += '}'; 3653 return; 3654 } 3655 3656 if (const ObjCObjectPointerType *OPT = T->getAs<ObjCObjectPointerType>()) { 3657 if (OPT->isObjCIdType()) { 3658 S += '@'; 3659 return; 3660 } 3661 3662 if (OPT->isObjCClassType() || OPT->isObjCQualifiedClassType()) { 3663 // FIXME: Consider if we need to output qualifiers for 'Class<p>'. 3664 // Since this is a binary compatibility issue, need to consult with runtime 3665 // folks. Fortunately, this is a *very* obsure construct. 3666 S += '#'; 3667 return; 3668 } 3669 3670 if (OPT->isObjCQualifiedIdType()) { 3671 getObjCEncodingForTypeImpl(getObjCIdType(), S, 3672 ExpandPointedToStructures, 3673 ExpandStructures, FD); 3674 if (FD || EncodingProperty) { 3675 // Note that we do extended encoding of protocol qualifer list 3676 // Only when doing ivar or property encoding. 3677 S += '"'; 3678 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 3679 E = OPT->qual_end(); I != E; ++I) { 3680 S += '<'; 3681 S += (*I)->getNameAsString(); 3682 S += '>'; 3683 } 3684 S += '"'; 3685 } 3686 return; 3687 } 3688 3689 QualType PointeeTy = OPT->getPointeeType(); 3690 if (!EncodingProperty && 3691 isa<TypedefType>(PointeeTy.getTypePtr())) { 3692 // Another historical/compatibility reason. 3693 // We encode the underlying type which comes out as 3694 // {...}; 3695 S += '^'; 3696 getObjCEncodingForTypeImpl(PointeeTy, S, 3697 false, ExpandPointedToStructures, 3698 NULL); 3699 return; 3700 } 3701 3702 S += '@'; 3703 if (OPT->getInterfaceDecl() && (FD || EncodingProperty)) { 3704 S += '"'; 3705 S += OPT->getInterfaceDecl()->getIdentifier()->getName(); 3706 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 3707 E = OPT->qual_end(); I != E; ++I) { 3708 S += '<'; 3709 S += (*I)->getNameAsString(); 3710 S += '>'; 3711 } 3712 S += '"'; 3713 } 3714 return; 3715 } 3716 3717 assert(0 && "@encode for type not implemented!"); 3718} 3719 3720void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 3721 std::string& S) const { 3722 if (QT & Decl::OBJC_TQ_In) 3723 S += 'n'; 3724 if (QT & Decl::OBJC_TQ_Inout) 3725 S += 'N'; 3726 if (QT & Decl::OBJC_TQ_Out) 3727 S += 'o'; 3728 if (QT & Decl::OBJC_TQ_Bycopy) 3729 S += 'O'; 3730 if (QT & Decl::OBJC_TQ_Byref) 3731 S += 'R'; 3732 if (QT & Decl::OBJC_TQ_Oneway) 3733 S += 'V'; 3734} 3735 3736void ASTContext::setBuiltinVaListType(QualType T) { 3737 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!"); 3738 3739 BuiltinVaListType = T; 3740} 3741 3742void ASTContext::setObjCIdType(QualType T) { 3743 ObjCIdTypedefType = T; 3744} 3745 3746void ASTContext::setObjCSelType(QualType T) { 3747 ObjCSelTypedefType = T; 3748} 3749 3750void ASTContext::setObjCProtoType(QualType QT) { 3751 ObjCProtoType = QT; 3752} 3753 3754void ASTContext::setObjCClassType(QualType T) { 3755 ObjCClassTypedefType = T; 3756} 3757 3758void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) { 3759 assert(ObjCConstantStringType.isNull() && 3760 "'NSConstantString' type already set!"); 3761 3762 ObjCConstantStringType = getObjCInterfaceType(Decl); 3763} 3764 3765/// \brief Retrieve the template name that corresponds to a non-empty 3766/// lookup. 3767TemplateName ASTContext::getOverloadedTemplateName(UnresolvedSetIterator Begin, 3768 UnresolvedSetIterator End) { 3769 unsigned size = End - Begin; 3770 assert(size > 1 && "set is not overloaded!"); 3771 3772 void *memory = Allocate(sizeof(OverloadedTemplateStorage) + 3773 size * sizeof(FunctionTemplateDecl*)); 3774 OverloadedTemplateStorage *OT = new(memory) OverloadedTemplateStorage(size); 3775 3776 NamedDecl **Storage = OT->getStorage(); 3777 for (UnresolvedSetIterator I = Begin; I != End; ++I) { 3778 NamedDecl *D = *I; 3779 assert(isa<FunctionTemplateDecl>(D) || 3780 (isa<UsingShadowDecl>(D) && 3781 isa<FunctionTemplateDecl>(D->getUnderlyingDecl()))); 3782 *Storage++ = D; 3783 } 3784 3785 return TemplateName(OT); 3786} 3787 3788/// \brief Retrieve the template name that represents a qualified 3789/// template name such as \c std::vector. 3790TemplateName ASTContext::getQualifiedTemplateName(NestedNameSpecifier *NNS, 3791 bool TemplateKeyword, 3792 TemplateDecl *Template) { 3793 // FIXME: Canonicalization? 3794 llvm::FoldingSetNodeID ID; 3795 QualifiedTemplateName::Profile(ID, NNS, TemplateKeyword, Template); 3796 3797 void *InsertPos = 0; 3798 QualifiedTemplateName *QTN = 3799 QualifiedTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3800 if (!QTN) { 3801 QTN = new (*this,4) QualifiedTemplateName(NNS, TemplateKeyword, Template); 3802 QualifiedTemplateNames.InsertNode(QTN, InsertPos); 3803 } 3804 3805 return TemplateName(QTN); 3806} 3807 3808/// \brief Retrieve the template name that represents a dependent 3809/// template name such as \c MetaFun::template apply. 3810TemplateName ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 3811 const IdentifierInfo *Name) { 3812 assert((!NNS || NNS->isDependent()) && 3813 "Nested name specifier must be dependent"); 3814 3815 llvm::FoldingSetNodeID ID; 3816 DependentTemplateName::Profile(ID, NNS, Name); 3817 3818 void *InsertPos = 0; 3819 DependentTemplateName *QTN = 3820 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3821 3822 if (QTN) 3823 return TemplateName(QTN); 3824 3825 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 3826 if (CanonNNS == NNS) { 3827 QTN = new (*this,4) DependentTemplateName(NNS, Name); 3828 } else { 3829 TemplateName Canon = getDependentTemplateName(CanonNNS, Name); 3830 QTN = new (*this,4) DependentTemplateName(NNS, Name, Canon); 3831 DependentTemplateName *CheckQTN = 3832 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3833 assert(!CheckQTN && "Dependent type name canonicalization broken"); 3834 (void)CheckQTN; 3835 } 3836 3837 DependentTemplateNames.InsertNode(QTN, InsertPos); 3838 return TemplateName(QTN); 3839} 3840 3841/// \brief Retrieve the template name that represents a dependent 3842/// template name such as \c MetaFun::template operator+. 3843TemplateName 3844ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 3845 OverloadedOperatorKind Operator) { 3846 assert((!NNS || NNS->isDependent()) && 3847 "Nested name specifier must be dependent"); 3848 3849 llvm::FoldingSetNodeID ID; 3850 DependentTemplateName::Profile(ID, NNS, Operator); 3851 3852 void *InsertPos = 0; 3853 DependentTemplateName *QTN 3854 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3855 3856 if (QTN) 3857 return TemplateName(QTN); 3858 3859 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 3860 if (CanonNNS == NNS) { 3861 QTN = new (*this,4) DependentTemplateName(NNS, Operator); 3862 } else { 3863 TemplateName Canon = getDependentTemplateName(CanonNNS, Operator); 3864 QTN = new (*this,4) DependentTemplateName(NNS, Operator, Canon); 3865 3866 DependentTemplateName *CheckQTN 3867 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3868 assert(!CheckQTN && "Dependent template name canonicalization broken"); 3869 (void)CheckQTN; 3870 } 3871 3872 DependentTemplateNames.InsertNode(QTN, InsertPos); 3873 return TemplateName(QTN); 3874} 3875 3876/// getFromTargetType - Given one of the integer types provided by 3877/// TargetInfo, produce the corresponding type. The unsigned @p Type 3878/// is actually a value of type @c TargetInfo::IntType. 3879CanQualType ASTContext::getFromTargetType(unsigned Type) const { 3880 switch (Type) { 3881 case TargetInfo::NoInt: return CanQualType(); 3882 case TargetInfo::SignedShort: return ShortTy; 3883 case TargetInfo::UnsignedShort: return UnsignedShortTy; 3884 case TargetInfo::SignedInt: return IntTy; 3885 case TargetInfo::UnsignedInt: return UnsignedIntTy; 3886 case TargetInfo::SignedLong: return LongTy; 3887 case TargetInfo::UnsignedLong: return UnsignedLongTy; 3888 case TargetInfo::SignedLongLong: return LongLongTy; 3889 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy; 3890 } 3891 3892 assert(false && "Unhandled TargetInfo::IntType value"); 3893 return CanQualType(); 3894} 3895 3896//===----------------------------------------------------------------------===// 3897// Type Predicates. 3898//===----------------------------------------------------------------------===// 3899 3900/// isObjCNSObjectType - Return true if this is an NSObject object using 3901/// NSObject attribute on a c-style pointer type. 3902/// FIXME - Make it work directly on types. 3903/// FIXME: Move to Type. 3904/// 3905bool ASTContext::isObjCNSObjectType(QualType Ty) const { 3906 if (TypedefType *TDT = dyn_cast<TypedefType>(Ty)) { 3907 if (TypedefDecl *TD = TDT->getDecl()) 3908 if (TD->getAttr<ObjCNSObjectAttr>()) 3909 return true; 3910 } 3911 return false; 3912} 3913 3914/// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 3915/// garbage collection attribute. 3916/// 3917Qualifiers::GC ASTContext::getObjCGCAttrKind(const QualType &Ty) const { 3918 Qualifiers::GC GCAttrs = Qualifiers::GCNone; 3919 if (getLangOptions().ObjC1 && 3920 getLangOptions().getGCMode() != LangOptions::NonGC) { 3921 GCAttrs = Ty.getObjCGCAttr(); 3922 // Default behavious under objective-c's gc is for objective-c pointers 3923 // (or pointers to them) be treated as though they were declared 3924 // as __strong. 3925 if (GCAttrs == Qualifiers::GCNone) { 3926 if (Ty->isObjCObjectPointerType() || Ty->isBlockPointerType()) 3927 GCAttrs = Qualifiers::Strong; 3928 else if (Ty->isPointerType()) 3929 return getObjCGCAttrKind(Ty->getAs<PointerType>()->getPointeeType()); 3930 } 3931 // Non-pointers have none gc'able attribute regardless of the attribute 3932 // set on them. 3933 else if (!Ty->isAnyPointerType() && !Ty->isBlockPointerType()) 3934 return Qualifiers::GCNone; 3935 } 3936 return GCAttrs; 3937} 3938 3939//===----------------------------------------------------------------------===// 3940// Type Compatibility Testing 3941//===----------------------------------------------------------------------===// 3942 3943/// areCompatVectorTypes - Return true if the two specified vector types are 3944/// compatible. 3945static bool areCompatVectorTypes(const VectorType *LHS, 3946 const VectorType *RHS) { 3947 assert(LHS->isCanonicalUnqualified() && RHS->isCanonicalUnqualified()); 3948 return LHS->getElementType() == RHS->getElementType() && 3949 LHS->getNumElements() == RHS->getNumElements(); 3950} 3951 3952//===----------------------------------------------------------------------===// 3953// ObjCQualifiedIdTypesAreCompatible - Compatibility testing for qualified id's. 3954//===----------------------------------------------------------------------===// 3955 3956/// ProtocolCompatibleWithProtocol - return 'true' if 'lProto' is in the 3957/// inheritance hierarchy of 'rProto'. 3958bool ASTContext::ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 3959 ObjCProtocolDecl *rProto) { 3960 if (lProto == rProto) 3961 return true; 3962 for (ObjCProtocolDecl::protocol_iterator PI = rProto->protocol_begin(), 3963 E = rProto->protocol_end(); PI != E; ++PI) 3964 if (ProtocolCompatibleWithProtocol(lProto, *PI)) 3965 return true; 3966 return false; 3967} 3968 3969/// QualifiedIdConformsQualifiedId - compare id<p,...> with id<p1,...> 3970/// return true if lhs's protocols conform to rhs's protocol; false 3971/// otherwise. 3972bool ASTContext::QualifiedIdConformsQualifiedId(QualType lhs, QualType rhs) { 3973 if (lhs->isObjCQualifiedIdType() && rhs->isObjCQualifiedIdType()) 3974 return ObjCQualifiedIdTypesAreCompatible(lhs, rhs, false); 3975 return false; 3976} 3977 3978/// ObjCQualifiedIdTypesAreCompatible - We know that one of lhs/rhs is an 3979/// ObjCQualifiedIDType. 3980bool ASTContext::ObjCQualifiedIdTypesAreCompatible(QualType lhs, QualType rhs, 3981 bool compare) { 3982 // Allow id<P..> and an 'id' or void* type in all cases. 3983 if (lhs->isVoidPointerType() || 3984 lhs->isObjCIdType() || lhs->isObjCClassType()) 3985 return true; 3986 else if (rhs->isVoidPointerType() || 3987 rhs->isObjCIdType() || rhs->isObjCClassType()) 3988 return true; 3989 3990 if (const ObjCObjectPointerType *lhsQID = lhs->getAsObjCQualifiedIdType()) { 3991 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 3992 3993 if (!rhsOPT) return false; 3994 3995 if (rhsOPT->qual_empty()) { 3996 // If the RHS is a unqualified interface pointer "NSString*", 3997 // make sure we check the class hierarchy. 3998 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 3999 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4000 E = lhsQID->qual_end(); I != E; ++I) { 4001 // when comparing an id<P> on lhs with a static type on rhs, 4002 // see if static class implements all of id's protocols, directly or 4003 // through its super class and categories. 4004 if (!rhsID->ClassImplementsProtocol(*I, true)) 4005 return false; 4006 } 4007 } 4008 // If there are no qualifiers and no interface, we have an 'id'. 4009 return true; 4010 } 4011 // Both the right and left sides have qualifiers. 4012 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4013 E = lhsQID->qual_end(); I != E; ++I) { 4014 ObjCProtocolDecl *lhsProto = *I; 4015 bool match = false; 4016 4017 // when comparing an id<P> on lhs with a static type on rhs, 4018 // see if static class implements all of id's protocols, directly or 4019 // through its super class and categories. 4020 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 4021 E = rhsOPT->qual_end(); J != E; ++J) { 4022 ObjCProtocolDecl *rhsProto = *J; 4023 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4024 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4025 match = true; 4026 break; 4027 } 4028 } 4029 // If the RHS is a qualified interface pointer "NSString<P>*", 4030 // make sure we check the class hierarchy. 4031 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4032 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4033 E = lhsQID->qual_end(); I != E; ++I) { 4034 // when comparing an id<P> on lhs with a static type on rhs, 4035 // see if static class implements all of id's protocols, directly or 4036 // through its super class and categories. 4037 if (rhsID->ClassImplementsProtocol(*I, true)) { 4038 match = true; 4039 break; 4040 } 4041 } 4042 } 4043 if (!match) 4044 return false; 4045 } 4046 4047 return true; 4048 } 4049 4050 const ObjCObjectPointerType *rhsQID = rhs->getAsObjCQualifiedIdType(); 4051 assert(rhsQID && "One of the LHS/RHS should be id<x>"); 4052 4053 if (const ObjCObjectPointerType *lhsOPT = 4054 lhs->getAsObjCInterfacePointerType()) { 4055 if (lhsOPT->qual_empty()) { 4056 bool match = false; 4057 if (ObjCInterfaceDecl *lhsID = lhsOPT->getInterfaceDecl()) { 4058 for (ObjCObjectPointerType::qual_iterator I = rhsQID->qual_begin(), 4059 E = rhsQID->qual_end(); I != E; ++I) { 4060 // when comparing an id<P> on lhs with a static type on rhs, 4061 // see if static class implements all of id's protocols, directly or 4062 // through its super class and categories. 4063 if (lhsID->ClassImplementsProtocol(*I, true)) { 4064 match = true; 4065 break; 4066 } 4067 } 4068 if (!match) 4069 return false; 4070 } 4071 return true; 4072 } 4073 // Both the right and left sides have qualifiers. 4074 for (ObjCObjectPointerType::qual_iterator I = lhsOPT->qual_begin(), 4075 E = lhsOPT->qual_end(); I != E; ++I) { 4076 ObjCProtocolDecl *lhsProto = *I; 4077 bool match = false; 4078 4079 // when comparing an id<P> on lhs with a static type on rhs, 4080 // see if static class implements all of id's protocols, directly or 4081 // through its super class and categories. 4082 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 4083 E = rhsQID->qual_end(); J != E; ++J) { 4084 ObjCProtocolDecl *rhsProto = *J; 4085 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4086 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4087 match = true; 4088 break; 4089 } 4090 } 4091 if (!match) 4092 return false; 4093 } 4094 return true; 4095 } 4096 return false; 4097} 4098 4099/// canAssignObjCInterfaces - Return true if the two interface types are 4100/// compatible for assignment from RHS to LHS. This handles validation of any 4101/// protocol qualifiers on the LHS or RHS. 4102/// 4103bool ASTContext::canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 4104 const ObjCObjectPointerType *RHSOPT) { 4105 // If either type represents the built-in 'id' or 'Class' types, return true. 4106 if (LHSOPT->isObjCBuiltinType() || RHSOPT->isObjCBuiltinType()) 4107 return true; 4108 4109 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 4110 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4111 QualType(RHSOPT,0), 4112 false); 4113 4114 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4115 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4116 if (LHS && RHS) // We have 2 user-defined types. 4117 return canAssignObjCInterfaces(LHS, RHS); 4118 4119 return false; 4120} 4121 4122/// canAssignObjCInterfacesInBlockPointer - This routine is specifically written 4123/// for providing type-safty for objective-c pointers used to pass/return 4124/// arguments in block literals. When passed as arguments, passing 'A*' where 4125/// 'id' is expected is not OK. Passing 'Sub *" where 'Super *" is expected is 4126/// not OK. For the return type, the opposite is not OK. 4127bool ASTContext::canAssignObjCInterfacesInBlockPointer( 4128 const ObjCObjectPointerType *LHSOPT, 4129 const ObjCObjectPointerType *RHSOPT) { 4130 if (RHSOPT->isObjCBuiltinType()) 4131 return true; 4132 4133 if (LHSOPT->isObjCBuiltinType()) { 4134 return RHSOPT->isObjCBuiltinType() || RHSOPT->isObjCQualifiedIdType(); 4135 } 4136 4137 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 4138 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4139 QualType(RHSOPT,0), 4140 false); 4141 4142 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4143 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4144 if (LHS && RHS) { // We have 2 user-defined types. 4145 if (LHS != RHS) { 4146 if (LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 4147 return false; 4148 if (RHS->getDecl()->isSuperClassOf(LHS->getDecl())) 4149 return true; 4150 } 4151 else 4152 return true; 4153 } 4154 return false; 4155} 4156 4157/// getIntersectionOfProtocols - This routine finds the intersection of set 4158/// of protocols inherited from two distinct objective-c pointer objects. 4159/// It is used to build composite qualifier list of the composite type of 4160/// the conditional expression involving two objective-c pointer objects. 4161static 4162void getIntersectionOfProtocols(ASTContext &Context, 4163 const ObjCObjectPointerType *LHSOPT, 4164 const ObjCObjectPointerType *RHSOPT, 4165 llvm::SmallVectorImpl<ObjCProtocolDecl *> &IntersectionOfProtocols) { 4166 4167 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4168 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4169 4170 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> InheritedProtocolSet; 4171 unsigned LHSNumProtocols = LHS->getNumProtocols(); 4172 if (LHSNumProtocols > 0) 4173 InheritedProtocolSet.insert(LHS->qual_begin(), LHS->qual_end()); 4174 else { 4175 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 4176 Context.CollectInheritedProtocols(LHS->getDecl(), LHSInheritedProtocols); 4177 InheritedProtocolSet.insert(LHSInheritedProtocols.begin(), 4178 LHSInheritedProtocols.end()); 4179 } 4180 4181 unsigned RHSNumProtocols = RHS->getNumProtocols(); 4182 if (RHSNumProtocols > 0) { 4183 ObjCProtocolDecl **RHSProtocols = (ObjCProtocolDecl **)RHS->qual_begin(); 4184 for (unsigned i = 0; i < RHSNumProtocols; ++i) 4185 if (InheritedProtocolSet.count(RHSProtocols[i])) 4186 IntersectionOfProtocols.push_back(RHSProtocols[i]); 4187 } 4188 else { 4189 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> RHSInheritedProtocols; 4190 Context.CollectInheritedProtocols(RHS->getDecl(), RHSInheritedProtocols); 4191 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 4192 RHSInheritedProtocols.begin(), 4193 E = RHSInheritedProtocols.end(); I != E; ++I) 4194 if (InheritedProtocolSet.count((*I))) 4195 IntersectionOfProtocols.push_back((*I)); 4196 } 4197} 4198 4199/// areCommonBaseCompatible - Returns common base class of the two classes if 4200/// one found. Note that this is O'2 algorithm. But it will be called as the 4201/// last type comparison in a ?-exp of ObjC pointer types before a 4202/// warning is issued. So, its invokation is extremely rare. 4203QualType ASTContext::areCommonBaseCompatible( 4204 const ObjCObjectPointerType *LHSOPT, 4205 const ObjCObjectPointerType *RHSOPT) { 4206 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4207 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4208 if (!LHS || !RHS) 4209 return QualType(); 4210 4211 while (const ObjCInterfaceDecl *LHSIDecl = LHS->getDecl()->getSuperClass()) { 4212 QualType LHSTy = getObjCInterfaceType(LHSIDecl); 4213 LHS = LHSTy->getAs<ObjCInterfaceType>(); 4214 if (canAssignObjCInterfaces(LHS, RHS)) { 4215 llvm::SmallVector<ObjCProtocolDecl *, 8> IntersectionOfProtocols; 4216 getIntersectionOfProtocols(*this, 4217 LHSOPT, RHSOPT, IntersectionOfProtocols); 4218 if (IntersectionOfProtocols.empty()) 4219 LHSTy = getObjCObjectPointerType(LHSTy); 4220 else 4221 LHSTy = getObjCObjectPointerType(LHSTy, &IntersectionOfProtocols[0], 4222 IntersectionOfProtocols.size()); 4223 return LHSTy; 4224 } 4225 } 4226 4227 return QualType(); 4228} 4229 4230bool ASTContext::canAssignObjCInterfaces(const ObjCInterfaceType *LHS, 4231 const ObjCInterfaceType *RHS) { 4232 // Verify that the base decls are compatible: the RHS must be a subclass of 4233 // the LHS. 4234 if (!LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 4235 return false; 4236 4237 // RHS must have a superset of the protocols in the LHS. If the LHS is not 4238 // protocol qualified at all, then we are good. 4239 if (LHS->getNumProtocols() == 0) 4240 return true; 4241 4242 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, then it 4243 // isn't a superset. 4244 if (RHS->getNumProtocols() == 0) 4245 return true; // FIXME: should return false! 4246 4247 for (ObjCInterfaceType::qual_iterator LHSPI = LHS->qual_begin(), 4248 LHSPE = LHS->qual_end(); 4249 LHSPI != LHSPE; LHSPI++) { 4250 bool RHSImplementsProtocol = false; 4251 4252 // If the RHS doesn't implement the protocol on the left, the types 4253 // are incompatible. 4254 for (ObjCInterfaceType::qual_iterator RHSPI = RHS->qual_begin(), 4255 RHSPE = RHS->qual_end(); 4256 RHSPI != RHSPE; RHSPI++) { 4257 if ((*RHSPI)->lookupProtocolNamed((*LHSPI)->getIdentifier())) { 4258 RHSImplementsProtocol = true; 4259 break; 4260 } 4261 } 4262 // FIXME: For better diagnostics, consider passing back the protocol name. 4263 if (!RHSImplementsProtocol) 4264 return false; 4265 } 4266 // The RHS implements all protocols listed on the LHS. 4267 return true; 4268} 4269 4270bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) { 4271 // get the "pointed to" types 4272 const ObjCObjectPointerType *LHSOPT = LHS->getAs<ObjCObjectPointerType>(); 4273 const ObjCObjectPointerType *RHSOPT = RHS->getAs<ObjCObjectPointerType>(); 4274 4275 if (!LHSOPT || !RHSOPT) 4276 return false; 4277 4278 return canAssignObjCInterfaces(LHSOPT, RHSOPT) || 4279 canAssignObjCInterfaces(RHSOPT, LHSOPT); 4280} 4281 4282/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible, 4283/// both shall have the identically qualified version of a compatible type. 4284/// C99 6.2.7p1: Two types have compatible types if their types are the 4285/// same. See 6.7.[2,3,5] for additional rules. 4286bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS) { 4287 if (getLangOptions().CPlusPlus) 4288 return hasSameType(LHS, RHS); 4289 4290 return !mergeTypes(LHS, RHS).isNull(); 4291} 4292 4293bool ASTContext::typesAreBlockPointerCompatible(QualType LHS, QualType RHS) { 4294 return !mergeTypes(LHS, RHS, true).isNull(); 4295} 4296 4297QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs, 4298 bool OfBlockPointer) { 4299 const FunctionType *lbase = lhs->getAs<FunctionType>(); 4300 const FunctionType *rbase = rhs->getAs<FunctionType>(); 4301 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 4302 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 4303 bool allLTypes = true; 4304 bool allRTypes = true; 4305 4306 // Check return type 4307 QualType retType; 4308 if (OfBlockPointer) 4309 retType = mergeTypes(rbase->getResultType(), lbase->getResultType(), true); 4310 else 4311 retType = mergeTypes(lbase->getResultType(), rbase->getResultType()); 4312 if (retType.isNull()) return QualType(); 4313 if (getCanonicalType(retType) != getCanonicalType(lbase->getResultType())) 4314 allLTypes = false; 4315 if (getCanonicalType(retType) != getCanonicalType(rbase->getResultType())) 4316 allRTypes = false; 4317 // FIXME: double check this 4318 bool NoReturn = lbase->getNoReturnAttr() || rbase->getNoReturnAttr(); 4319 if (NoReturn != lbase->getNoReturnAttr()) 4320 allLTypes = false; 4321 if (NoReturn != rbase->getNoReturnAttr()) 4322 allRTypes = false; 4323 CallingConv lcc = lbase->getCallConv(); 4324 CallingConv rcc = rbase->getCallConv(); 4325 // Compatible functions must have compatible calling conventions 4326 if (!isSameCallConv(lcc, rcc)) 4327 return QualType(); 4328 4329 if (lproto && rproto) { // two C99 style function prototypes 4330 assert(!lproto->hasExceptionSpec() && !rproto->hasExceptionSpec() && 4331 "C++ shouldn't be here"); 4332 unsigned lproto_nargs = lproto->getNumArgs(); 4333 unsigned rproto_nargs = rproto->getNumArgs(); 4334 4335 // Compatible functions must have the same number of arguments 4336 if (lproto_nargs != rproto_nargs) 4337 return QualType(); 4338 4339 // Variadic and non-variadic functions aren't compatible 4340 if (lproto->isVariadic() != rproto->isVariadic()) 4341 return QualType(); 4342 4343 if (lproto->getTypeQuals() != rproto->getTypeQuals()) 4344 return QualType(); 4345 4346 // Check argument compatibility 4347 llvm::SmallVector<QualType, 10> types; 4348 for (unsigned i = 0; i < lproto_nargs; i++) { 4349 QualType largtype = lproto->getArgType(i).getUnqualifiedType(); 4350 QualType rargtype = rproto->getArgType(i).getUnqualifiedType(); 4351 QualType argtype = mergeTypes(largtype, rargtype, OfBlockPointer); 4352 if (argtype.isNull()) return QualType(); 4353 types.push_back(argtype); 4354 if (getCanonicalType(argtype) != getCanonicalType(largtype)) 4355 allLTypes = false; 4356 if (getCanonicalType(argtype) != getCanonicalType(rargtype)) 4357 allRTypes = false; 4358 } 4359 if (allLTypes) return lhs; 4360 if (allRTypes) return rhs; 4361 return getFunctionType(retType, types.begin(), types.size(), 4362 lproto->isVariadic(), lproto->getTypeQuals(), 4363 false, false, 0, 0, NoReturn, lcc); 4364 } 4365 4366 if (lproto) allRTypes = false; 4367 if (rproto) allLTypes = false; 4368 4369 const FunctionProtoType *proto = lproto ? lproto : rproto; 4370 if (proto) { 4371 assert(!proto->hasExceptionSpec() && "C++ shouldn't be here"); 4372 if (proto->isVariadic()) return QualType(); 4373 // Check that the types are compatible with the types that 4374 // would result from default argument promotions (C99 6.7.5.3p15). 4375 // The only types actually affected are promotable integer 4376 // types and floats, which would be passed as a different 4377 // type depending on whether the prototype is visible. 4378 unsigned proto_nargs = proto->getNumArgs(); 4379 for (unsigned i = 0; i < proto_nargs; ++i) { 4380 QualType argTy = proto->getArgType(i); 4381 4382 // Look at the promotion type of enum types, since that is the type used 4383 // to pass enum values. 4384 if (const EnumType *Enum = argTy->getAs<EnumType>()) 4385 argTy = Enum->getDecl()->getPromotionType(); 4386 4387 if (argTy->isPromotableIntegerType() || 4388 getCanonicalType(argTy).getUnqualifiedType() == FloatTy) 4389 return QualType(); 4390 } 4391 4392 if (allLTypes) return lhs; 4393 if (allRTypes) return rhs; 4394 return getFunctionType(retType, proto->arg_type_begin(), 4395 proto->getNumArgs(), proto->isVariadic(), 4396 proto->getTypeQuals(), 4397 false, false, 0, 0, NoReturn, lcc); 4398 } 4399 4400 if (allLTypes) return lhs; 4401 if (allRTypes) return rhs; 4402 return getFunctionNoProtoType(retType, NoReturn, lcc); 4403} 4404 4405QualType ASTContext::mergeTypes(QualType LHS, QualType RHS, 4406 bool OfBlockPointer) { 4407 // C++ [expr]: If an expression initially has the type "reference to T", the 4408 // type is adjusted to "T" prior to any further analysis, the expression 4409 // designates the object or function denoted by the reference, and the 4410 // expression is an lvalue unless the reference is an rvalue reference and 4411 // the expression is a function call (possibly inside parentheses). 4412 assert(!LHS->getAs<ReferenceType>() && "LHS is a reference type?"); 4413 assert(!RHS->getAs<ReferenceType>() && "RHS is a reference type?"); 4414 4415 QualType LHSCan = getCanonicalType(LHS), 4416 RHSCan = getCanonicalType(RHS); 4417 4418 // If two types are identical, they are compatible. 4419 if (LHSCan == RHSCan) 4420 return LHS; 4421 4422 // If the qualifiers are different, the types aren't compatible... mostly. 4423 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 4424 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 4425 if (LQuals != RQuals) { 4426 // If any of these qualifiers are different, we have a type 4427 // mismatch. 4428 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 4429 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 4430 return QualType(); 4431 4432 // Exactly one GC qualifier difference is allowed: __strong is 4433 // okay if the other type has no GC qualifier but is an Objective 4434 // C object pointer (i.e. implicitly strong by default). We fix 4435 // this by pretending that the unqualified type was actually 4436 // qualified __strong. 4437 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 4438 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 4439 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 4440 4441 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 4442 return QualType(); 4443 4444 if (GC_L == Qualifiers::Strong && RHSCan->isObjCObjectPointerType()) { 4445 return mergeTypes(LHS, getObjCGCQualType(RHS, Qualifiers::Strong)); 4446 } 4447 if (GC_R == Qualifiers::Strong && LHSCan->isObjCObjectPointerType()) { 4448 return mergeTypes(getObjCGCQualType(LHS, Qualifiers::Strong), RHS); 4449 } 4450 return QualType(); 4451 } 4452 4453 // Okay, qualifiers are equal. 4454 4455 Type::TypeClass LHSClass = LHSCan->getTypeClass(); 4456 Type::TypeClass RHSClass = RHSCan->getTypeClass(); 4457 4458 // We want to consider the two function types to be the same for these 4459 // comparisons, just force one to the other. 4460 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto; 4461 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto; 4462 4463 // Same as above for arrays 4464 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray) 4465 LHSClass = Type::ConstantArray; 4466 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray) 4467 RHSClass = Type::ConstantArray; 4468 4469 // Canonicalize ExtVector -> Vector. 4470 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector; 4471 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector; 4472 4473 // If the canonical type classes don't match. 4474 if (LHSClass != RHSClass) { 4475 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char, 4476 // a signed integer type, or an unsigned integer type. 4477 // Compatibility is based on the underlying type, not the promotion 4478 // type. 4479 if (const EnumType* ETy = LHS->getAs<EnumType>()) { 4480 if (ETy->getDecl()->getIntegerType() == RHSCan.getUnqualifiedType()) 4481 return RHS; 4482 } 4483 if (const EnumType* ETy = RHS->getAs<EnumType>()) { 4484 if (ETy->getDecl()->getIntegerType() == LHSCan.getUnqualifiedType()) 4485 return LHS; 4486 } 4487 4488 return QualType(); 4489 } 4490 4491 // The canonical type classes match. 4492 switch (LHSClass) { 4493#define TYPE(Class, Base) 4494#define ABSTRACT_TYPE(Class, Base) 4495#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) case Type::Class: 4496#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 4497#define DEPENDENT_TYPE(Class, Base) case Type::Class: 4498#include "clang/AST/TypeNodes.def" 4499 assert(false && "Non-canonical and dependent types shouldn't get here"); 4500 return QualType(); 4501 4502 case Type::LValueReference: 4503 case Type::RValueReference: 4504 case Type::MemberPointer: 4505 assert(false && "C++ should never be in mergeTypes"); 4506 return QualType(); 4507 4508 case Type::IncompleteArray: 4509 case Type::VariableArray: 4510 case Type::FunctionProto: 4511 case Type::ExtVector: 4512 assert(false && "Types are eliminated above"); 4513 return QualType(); 4514 4515 case Type::Pointer: 4516 { 4517 // Merge two pointer types, while trying to preserve typedef info 4518 QualType LHSPointee = LHS->getAs<PointerType>()->getPointeeType(); 4519 QualType RHSPointee = RHS->getAs<PointerType>()->getPointeeType(); 4520 QualType ResultType = mergeTypes(LHSPointee, RHSPointee); 4521 if (ResultType.isNull()) return QualType(); 4522 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 4523 return LHS; 4524 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 4525 return RHS; 4526 return getPointerType(ResultType); 4527 } 4528 case Type::BlockPointer: 4529 { 4530 // Merge two block pointer types, while trying to preserve typedef info 4531 QualType LHSPointee = LHS->getAs<BlockPointerType>()->getPointeeType(); 4532 QualType RHSPointee = RHS->getAs<BlockPointerType>()->getPointeeType(); 4533 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, OfBlockPointer); 4534 if (ResultType.isNull()) return QualType(); 4535 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 4536 return LHS; 4537 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 4538 return RHS; 4539 return getBlockPointerType(ResultType); 4540 } 4541 case Type::ConstantArray: 4542 { 4543 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS); 4544 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS); 4545 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize()) 4546 return QualType(); 4547 4548 QualType LHSElem = getAsArrayType(LHS)->getElementType(); 4549 QualType RHSElem = getAsArrayType(RHS)->getElementType(); 4550 QualType ResultType = mergeTypes(LHSElem, RHSElem); 4551 if (ResultType.isNull()) return QualType(); 4552 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 4553 return LHS; 4554 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 4555 return RHS; 4556 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(), 4557 ArrayType::ArraySizeModifier(), 0); 4558 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(), 4559 ArrayType::ArraySizeModifier(), 0); 4560 const VariableArrayType* LVAT = getAsVariableArrayType(LHS); 4561 const VariableArrayType* RVAT = getAsVariableArrayType(RHS); 4562 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 4563 return LHS; 4564 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 4565 return RHS; 4566 if (LVAT) { 4567 // FIXME: This isn't correct! But tricky to implement because 4568 // the array's size has to be the size of LHS, but the type 4569 // has to be different. 4570 return LHS; 4571 } 4572 if (RVAT) { 4573 // FIXME: This isn't correct! But tricky to implement because 4574 // the array's size has to be the size of RHS, but the type 4575 // has to be different. 4576 return RHS; 4577 } 4578 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS; 4579 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS; 4580 return getIncompleteArrayType(ResultType, 4581 ArrayType::ArraySizeModifier(), 0); 4582 } 4583 case Type::FunctionNoProto: 4584 return mergeFunctionTypes(LHS, RHS, OfBlockPointer); 4585 case Type::Record: 4586 case Type::Enum: 4587 return QualType(); 4588 case Type::Builtin: 4589 // Only exactly equal builtin types are compatible, which is tested above. 4590 return QualType(); 4591 case Type::Complex: 4592 // Distinct complex types are incompatible. 4593 return QualType(); 4594 case Type::Vector: 4595 // FIXME: The merged type should be an ExtVector! 4596 if (areCompatVectorTypes(LHSCan->getAs<VectorType>(), 4597 RHSCan->getAs<VectorType>())) 4598 return LHS; 4599 return QualType(); 4600 case Type::ObjCInterface: { 4601 // Check if the interfaces are assignment compatible. 4602 // FIXME: This should be type compatibility, e.g. whether 4603 // "LHS x; RHS x;" at global scope is legal. 4604 const ObjCInterfaceType* LHSIface = LHS->getAs<ObjCInterfaceType>(); 4605 const ObjCInterfaceType* RHSIface = RHS->getAs<ObjCInterfaceType>(); 4606 if (LHSIface && RHSIface && 4607 canAssignObjCInterfaces(LHSIface, RHSIface)) 4608 return LHS; 4609 4610 return QualType(); 4611 } 4612 case Type::ObjCObjectPointer: { 4613 if (OfBlockPointer) { 4614 if (canAssignObjCInterfacesInBlockPointer( 4615 LHS->getAs<ObjCObjectPointerType>(), 4616 RHS->getAs<ObjCObjectPointerType>())) 4617 return LHS; 4618 return QualType(); 4619 } 4620 if (canAssignObjCInterfaces(LHS->getAs<ObjCObjectPointerType>(), 4621 RHS->getAs<ObjCObjectPointerType>())) 4622 return LHS; 4623 4624 return QualType(); 4625 } 4626 } 4627 4628 return QualType(); 4629} 4630 4631//===----------------------------------------------------------------------===// 4632// Integer Predicates 4633//===----------------------------------------------------------------------===// 4634 4635unsigned ASTContext::getIntWidth(QualType T) { 4636 if (T->isBooleanType()) 4637 return 1; 4638 if (EnumType *ET = dyn_cast<EnumType>(T)) 4639 T = ET->getDecl()->getIntegerType(); 4640 // For builtin types, just use the standard type sizing method 4641 return (unsigned)getTypeSize(T); 4642} 4643 4644QualType ASTContext::getCorrespondingUnsignedType(QualType T) { 4645 assert(T->isSignedIntegerType() && "Unexpected type"); 4646 4647 // Turn <4 x signed int> -> <4 x unsigned int> 4648 if (const VectorType *VTy = T->getAs<VectorType>()) 4649 return getVectorType(getCorrespondingUnsignedType(VTy->getElementType()), 4650 VTy->getNumElements(), VTy->isAltiVec(), VTy->isPixel()); 4651 4652 // For enums, we return the unsigned version of the base type. 4653 if (const EnumType *ETy = T->getAs<EnumType>()) 4654 T = ETy->getDecl()->getIntegerType(); 4655 4656 const BuiltinType *BTy = T->getAs<BuiltinType>(); 4657 assert(BTy && "Unexpected signed integer type"); 4658 switch (BTy->getKind()) { 4659 case BuiltinType::Char_S: 4660 case BuiltinType::SChar: 4661 return UnsignedCharTy; 4662 case BuiltinType::Short: 4663 return UnsignedShortTy; 4664 case BuiltinType::Int: 4665 return UnsignedIntTy; 4666 case BuiltinType::Long: 4667 return UnsignedLongTy; 4668 case BuiltinType::LongLong: 4669 return UnsignedLongLongTy; 4670 case BuiltinType::Int128: 4671 return UnsignedInt128Ty; 4672 default: 4673 assert(0 && "Unexpected signed integer type"); 4674 return QualType(); 4675 } 4676} 4677 4678ExternalASTSource::~ExternalASTSource() { } 4679 4680void ExternalASTSource::PrintStats() { } 4681 4682 4683//===----------------------------------------------------------------------===// 4684// Builtin Type Computation 4685//===----------------------------------------------------------------------===// 4686 4687/// DecodeTypeFromStr - This decodes one type descriptor from Str, advancing the 4688/// pointer over the consumed characters. This returns the resultant type. 4689static QualType DecodeTypeFromStr(const char *&Str, ASTContext &Context, 4690 ASTContext::GetBuiltinTypeError &Error, 4691 bool AllowTypeModifiers = true) { 4692 // Modifiers. 4693 int HowLong = 0; 4694 bool Signed = false, Unsigned = false; 4695 4696 // Read the modifiers first. 4697 bool Done = false; 4698 while (!Done) { 4699 switch (*Str++) { 4700 default: Done = true; --Str; break; 4701 case 'S': 4702 assert(!Unsigned && "Can't use both 'S' and 'U' modifiers!"); 4703 assert(!Signed && "Can't use 'S' modifier multiple times!"); 4704 Signed = true; 4705 break; 4706 case 'U': 4707 assert(!Signed && "Can't use both 'S' and 'U' modifiers!"); 4708 assert(!Unsigned && "Can't use 'S' modifier multiple times!"); 4709 Unsigned = true; 4710 break; 4711 case 'L': 4712 assert(HowLong <= 2 && "Can't have LLLL modifier"); 4713 ++HowLong; 4714 break; 4715 } 4716 } 4717 4718 QualType Type; 4719 4720 // Read the base type. 4721 switch (*Str++) { 4722 default: assert(0 && "Unknown builtin type letter!"); 4723 case 'v': 4724 assert(HowLong == 0 && !Signed && !Unsigned && 4725 "Bad modifiers used with 'v'!"); 4726 Type = Context.VoidTy; 4727 break; 4728 case 'f': 4729 assert(HowLong == 0 && !Signed && !Unsigned && 4730 "Bad modifiers used with 'f'!"); 4731 Type = Context.FloatTy; 4732 break; 4733 case 'd': 4734 assert(HowLong < 2 && !Signed && !Unsigned && 4735 "Bad modifiers used with 'd'!"); 4736 if (HowLong) 4737 Type = Context.LongDoubleTy; 4738 else 4739 Type = Context.DoubleTy; 4740 break; 4741 case 's': 4742 assert(HowLong == 0 && "Bad modifiers used with 's'!"); 4743 if (Unsigned) 4744 Type = Context.UnsignedShortTy; 4745 else 4746 Type = Context.ShortTy; 4747 break; 4748 case 'i': 4749 if (HowLong == 3) 4750 Type = Unsigned ? Context.UnsignedInt128Ty : Context.Int128Ty; 4751 else if (HowLong == 2) 4752 Type = Unsigned ? Context.UnsignedLongLongTy : Context.LongLongTy; 4753 else if (HowLong == 1) 4754 Type = Unsigned ? Context.UnsignedLongTy : Context.LongTy; 4755 else 4756 Type = Unsigned ? Context.UnsignedIntTy : Context.IntTy; 4757 break; 4758 case 'c': 4759 assert(HowLong == 0 && "Bad modifiers used with 'c'!"); 4760 if (Signed) 4761 Type = Context.SignedCharTy; 4762 else if (Unsigned) 4763 Type = Context.UnsignedCharTy; 4764 else 4765 Type = Context.CharTy; 4766 break; 4767 case 'b': // boolean 4768 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'b'!"); 4769 Type = Context.BoolTy; 4770 break; 4771 case 'z': // size_t. 4772 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'z'!"); 4773 Type = Context.getSizeType(); 4774 break; 4775 case 'F': 4776 Type = Context.getCFConstantStringType(); 4777 break; 4778 case 'a': 4779 Type = Context.getBuiltinVaListType(); 4780 assert(!Type.isNull() && "builtin va list type not initialized!"); 4781 break; 4782 case 'A': 4783 // This is a "reference" to a va_list; however, what exactly 4784 // this means depends on how va_list is defined. There are two 4785 // different kinds of va_list: ones passed by value, and ones 4786 // passed by reference. An example of a by-value va_list is 4787 // x86, where va_list is a char*. An example of by-ref va_list 4788 // is x86-64, where va_list is a __va_list_tag[1]. For x86, 4789 // we want this argument to be a char*&; for x86-64, we want 4790 // it to be a __va_list_tag*. 4791 Type = Context.getBuiltinVaListType(); 4792 assert(!Type.isNull() && "builtin va list type not initialized!"); 4793 if (Type->isArrayType()) { 4794 Type = Context.getArrayDecayedType(Type); 4795 } else { 4796 Type = Context.getLValueReferenceType(Type); 4797 } 4798 break; 4799 case 'V': { 4800 char *End; 4801 unsigned NumElements = strtoul(Str, &End, 10); 4802 assert(End != Str && "Missing vector size"); 4803 4804 Str = End; 4805 4806 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 4807 // FIXME: Don't know what to do about AltiVec. 4808 Type = Context.getVectorType(ElementType, NumElements, false, false); 4809 break; 4810 } 4811 case 'X': { 4812 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 4813 Type = Context.getComplexType(ElementType); 4814 break; 4815 } 4816 case 'P': 4817 Type = Context.getFILEType(); 4818 if (Type.isNull()) { 4819 Error = ASTContext::GE_Missing_stdio; 4820 return QualType(); 4821 } 4822 break; 4823 case 'J': 4824 if (Signed) 4825 Type = Context.getsigjmp_bufType(); 4826 else 4827 Type = Context.getjmp_bufType(); 4828 4829 if (Type.isNull()) { 4830 Error = ASTContext::GE_Missing_setjmp; 4831 return QualType(); 4832 } 4833 break; 4834 } 4835 4836 if (!AllowTypeModifiers) 4837 return Type; 4838 4839 Done = false; 4840 while (!Done) { 4841 switch (char c = *Str++) { 4842 default: Done = true; --Str; break; 4843 case '*': 4844 case '&': 4845 { 4846 // Both pointers and references can have their pointee types 4847 // qualified with an address space. 4848 char *End; 4849 unsigned AddrSpace = strtoul(Str, &End, 10); 4850 if (End != Str && AddrSpace != 0) { 4851 Type = Context.getAddrSpaceQualType(Type, AddrSpace); 4852 Str = End; 4853 } 4854 } 4855 if (c == '*') 4856 Type = Context.getPointerType(Type); 4857 else 4858 Type = Context.getLValueReferenceType(Type); 4859 break; 4860 // FIXME: There's no way to have a built-in with an rvalue ref arg. 4861 case 'C': 4862 Type = Type.withConst(); 4863 break; 4864 case 'D': 4865 Type = Context.getVolatileType(Type); 4866 break; 4867 } 4868 } 4869 4870 return Type; 4871} 4872 4873/// GetBuiltinType - Return the type for the specified builtin. 4874QualType ASTContext::GetBuiltinType(unsigned id, 4875 GetBuiltinTypeError &Error) { 4876 const char *TypeStr = BuiltinInfo.GetTypeString(id); 4877 4878 llvm::SmallVector<QualType, 8> ArgTypes; 4879 4880 Error = GE_None; 4881 QualType ResType = DecodeTypeFromStr(TypeStr, *this, Error); 4882 if (Error != GE_None) 4883 return QualType(); 4884 while (TypeStr[0] && TypeStr[0] != '.') { 4885 QualType Ty = DecodeTypeFromStr(TypeStr, *this, Error); 4886 if (Error != GE_None) 4887 return QualType(); 4888 4889 // Do array -> pointer decay. The builtin should use the decayed type. 4890 if (Ty->isArrayType()) 4891 Ty = getArrayDecayedType(Ty); 4892 4893 ArgTypes.push_back(Ty); 4894 } 4895 4896 assert((TypeStr[0] != '.' || TypeStr[1] == 0) && 4897 "'.' should only occur at end of builtin type list!"); 4898 4899 // handle untyped/variadic arguments "T c99Style();" or "T cppStyle(...);". 4900 if (ArgTypes.size() == 0 && TypeStr[0] == '.') 4901 return getFunctionNoProtoType(ResType); 4902 4903 // FIXME: Should we create noreturn types? 4904 return getFunctionType(ResType, ArgTypes.data(), ArgTypes.size(), 4905 TypeStr[0] == '.', 0, false, false, 0, 0, 4906 false, CC_Default); 4907} 4908 4909QualType 4910ASTContext::UsualArithmeticConversionsType(QualType lhs, QualType rhs) { 4911 // Perform the usual unary conversions. We do this early so that 4912 // integral promotions to "int" can allow us to exit early, in the 4913 // lhs == rhs check. Also, for conversion purposes, we ignore any 4914 // qualifiers. For example, "const float" and "float" are 4915 // equivalent. 4916 if (lhs->isPromotableIntegerType()) 4917 lhs = getPromotedIntegerType(lhs); 4918 else 4919 lhs = lhs.getUnqualifiedType(); 4920 if (rhs->isPromotableIntegerType()) 4921 rhs = getPromotedIntegerType(rhs); 4922 else 4923 rhs = rhs.getUnqualifiedType(); 4924 4925 // If both types are identical, no conversion is needed. 4926 if (lhs == rhs) 4927 return lhs; 4928 4929 // If either side is a non-arithmetic type (e.g. a pointer), we are done. 4930 // The caller can deal with this (e.g. pointer + int). 4931 if (!lhs->isArithmeticType() || !rhs->isArithmeticType()) 4932 return lhs; 4933 4934 // At this point, we have two different arithmetic types. 4935 4936 // Handle complex types first (C99 6.3.1.8p1). 4937 if (lhs->isComplexType() || rhs->isComplexType()) { 4938 // if we have an integer operand, the result is the complex type. 4939 if (rhs->isIntegerType() || rhs->isComplexIntegerType()) { 4940 // convert the rhs to the lhs complex type. 4941 return lhs; 4942 } 4943 if (lhs->isIntegerType() || lhs->isComplexIntegerType()) { 4944 // convert the lhs to the rhs complex type. 4945 return rhs; 4946 } 4947 // This handles complex/complex, complex/float, or float/complex. 4948 // When both operands are complex, the shorter operand is converted to the 4949 // type of the longer, and that is the type of the result. This corresponds 4950 // to what is done when combining two real floating-point operands. 4951 // The fun begins when size promotion occur across type domains. 4952 // From H&S 6.3.4: When one operand is complex and the other is a real 4953 // floating-point type, the less precise type is converted, within it's 4954 // real or complex domain, to the precision of the other type. For example, 4955 // when combining a "long double" with a "double _Complex", the 4956 // "double _Complex" is promoted to "long double _Complex". 4957 int result = getFloatingTypeOrder(lhs, rhs); 4958 4959 if (result > 0) { // The left side is bigger, convert rhs. 4960 rhs = getFloatingTypeOfSizeWithinDomain(lhs, rhs); 4961 } else if (result < 0) { // The right side is bigger, convert lhs. 4962 lhs = getFloatingTypeOfSizeWithinDomain(rhs, lhs); 4963 } 4964 // At this point, lhs and rhs have the same rank/size. Now, make sure the 4965 // domains match. This is a requirement for our implementation, C99 4966 // does not require this promotion. 4967 if (lhs != rhs) { // Domains don't match, we have complex/float mix. 4968 if (lhs->isRealFloatingType()) { // handle "double, _Complex double". 4969 return rhs; 4970 } else { // handle "_Complex double, double". 4971 return lhs; 4972 } 4973 } 4974 return lhs; // The domain/size match exactly. 4975 } 4976 // Now handle "real" floating types (i.e. float, double, long double). 4977 if (lhs->isRealFloatingType() || rhs->isRealFloatingType()) { 4978 // if we have an integer operand, the result is the real floating type. 4979 if (rhs->isIntegerType()) { 4980 // convert rhs to the lhs floating point type. 4981 return lhs; 4982 } 4983 if (rhs->isComplexIntegerType()) { 4984 // convert rhs to the complex floating point type. 4985 return getComplexType(lhs); 4986 } 4987 if (lhs->isIntegerType()) { 4988 // convert lhs to the rhs floating point type. 4989 return rhs; 4990 } 4991 if (lhs->isComplexIntegerType()) { 4992 // convert lhs to the complex floating point type. 4993 return getComplexType(rhs); 4994 } 4995 // We have two real floating types, float/complex combos were handled above. 4996 // Convert the smaller operand to the bigger result. 4997 int result = getFloatingTypeOrder(lhs, rhs); 4998 if (result > 0) // convert the rhs 4999 return lhs; 5000 assert(result < 0 && "illegal float comparison"); 5001 return rhs; // convert the lhs 5002 } 5003 if (lhs->isComplexIntegerType() || rhs->isComplexIntegerType()) { 5004 // Handle GCC complex int extension. 5005 const ComplexType *lhsComplexInt = lhs->getAsComplexIntegerType(); 5006 const ComplexType *rhsComplexInt = rhs->getAsComplexIntegerType(); 5007 5008 if (lhsComplexInt && rhsComplexInt) { 5009 if (getIntegerTypeOrder(lhsComplexInt->getElementType(), 5010 rhsComplexInt->getElementType()) >= 0) 5011 return lhs; // convert the rhs 5012 return rhs; 5013 } else if (lhsComplexInt && rhs->isIntegerType()) { 5014 // convert the rhs to the lhs complex type. 5015 return lhs; 5016 } else if (rhsComplexInt && lhs->isIntegerType()) { 5017 // convert the lhs to the rhs complex type. 5018 return rhs; 5019 } 5020 } 5021 // Finally, we have two differing integer types. 5022 // The rules for this case are in C99 6.3.1.8 5023 int compare = getIntegerTypeOrder(lhs, rhs); 5024 bool lhsSigned = lhs->isSignedIntegerType(), 5025 rhsSigned = rhs->isSignedIntegerType(); 5026 QualType destType; 5027 if (lhsSigned == rhsSigned) { 5028 // Same signedness; use the higher-ranked type 5029 destType = compare >= 0 ? lhs : rhs; 5030 } else if (compare != (lhsSigned ? 1 : -1)) { 5031 // The unsigned type has greater than or equal rank to the 5032 // signed type, so use the unsigned type 5033 destType = lhsSigned ? rhs : lhs; 5034 } else if (getIntWidth(lhs) != getIntWidth(rhs)) { 5035 // The two types are different widths; if we are here, that 5036 // means the signed type is larger than the unsigned type, so 5037 // use the signed type. 5038 destType = lhsSigned ? lhs : rhs; 5039 } else { 5040 // The signed type is higher-ranked than the unsigned type, 5041 // but isn't actually any bigger (like unsigned int and long 5042 // on most 32-bit systems). Use the unsigned type corresponding 5043 // to the signed type. 5044 destType = getCorrespondingUnsignedType(lhsSigned ? lhs : rhs); 5045 } 5046 return destType; 5047} 5048