ASTContext.cpp revision 6f46c2653c1545cc3fef0c0df996d18160160ce8
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 LastSDM(0, 0) { 50 ObjCIdRedefinitionType = QualType(); 51 ObjCClassRedefinitionType = QualType(); 52 ObjCSelRedefinitionType = QualType(); 53 if (size_reserve > 0) Types.reserve(size_reserve); 54 TUDecl = TranslationUnitDecl::Create(*this); 55 InitBuiltinTypes(); 56} 57 58ASTContext::~ASTContext() { 59 // Release the DenseMaps associated with DeclContext objects. 60 // FIXME: Is this the ideal solution? 61 ReleaseDeclContextMaps(); 62 63 // Release all of the memory associated with overridden C++ methods. 64 for (llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::iterator 65 OM = OverriddenMethods.begin(), OMEnd = OverriddenMethods.end(); 66 OM != OMEnd; ++OM) 67 OM->second.Destroy(); 68 69 if (FreeMemory) { 70 // Deallocate all the types. 71 while (!Types.empty()) { 72 Types.back()->Destroy(*this); 73 Types.pop_back(); 74 } 75 76 for (llvm::FoldingSet<ExtQuals>::iterator 77 I = ExtQualNodes.begin(), E = ExtQualNodes.end(); I != E; ) { 78 // Increment in loop to prevent using deallocated memory. 79 Deallocate(&*I++); 80 } 81 82 for (llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*>::iterator 83 I = ASTRecordLayouts.begin(), E = ASTRecordLayouts.end(); I != E; ) { 84 // Increment in loop to prevent using deallocated memory. 85 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 86 R->Destroy(*this); 87 } 88 89 for (llvm::DenseMap<const ObjCContainerDecl*, 90 const ASTRecordLayout*>::iterator 91 I = ObjCLayouts.begin(), E = ObjCLayouts.end(); I != E; ) { 92 // Increment in loop to prevent using deallocated memory. 93 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 94 R->Destroy(*this); 95 } 96 } 97 98 // Destroy nested-name-specifiers. 99 for (llvm::FoldingSet<NestedNameSpecifier>::iterator 100 NNS = NestedNameSpecifiers.begin(), 101 NNSEnd = NestedNameSpecifiers.end(); 102 NNS != NNSEnd; ) { 103 // Increment in loop to prevent using deallocated memory. 104 (*NNS++).Destroy(*this); 105 } 106 107 if (GlobalNestedNameSpecifier) 108 GlobalNestedNameSpecifier->Destroy(*this); 109 110 TUDecl->Destroy(*this); 111} 112 113void 114ASTContext::setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source) { 115 ExternalSource.reset(Source.take()); 116} 117 118void ASTContext::PrintStats() const { 119 fprintf(stderr, "*** AST Context Stats:\n"); 120 fprintf(stderr, " %d types total.\n", (int)Types.size()); 121 122 unsigned counts[] = { 123#define TYPE(Name, Parent) 0, 124#define ABSTRACT_TYPE(Name, Parent) 125#include "clang/AST/TypeNodes.def" 126 0 // Extra 127 }; 128 129 for (unsigned i = 0, e = Types.size(); i != e; ++i) { 130 Type *T = Types[i]; 131 counts[(unsigned)T->getTypeClass()]++; 132 } 133 134 unsigned Idx = 0; 135 unsigned TotalBytes = 0; 136#define TYPE(Name, Parent) \ 137 if (counts[Idx]) \ 138 fprintf(stderr, " %d %s types\n", (int)counts[Idx], #Name); \ 139 TotalBytes += counts[Idx] * sizeof(Name##Type); \ 140 ++Idx; 141#define ABSTRACT_TYPE(Name, Parent) 142#include "clang/AST/TypeNodes.def" 143 144 fprintf(stderr, "Total bytes = %d\n", int(TotalBytes)); 145 146 if (ExternalSource.get()) { 147 fprintf(stderr, "\n"); 148 ExternalSource->PrintStats(); 149 } 150} 151 152 153void ASTContext::InitBuiltinType(CanQualType &R, BuiltinType::Kind K) { 154 BuiltinType *Ty = new (*this, TypeAlignment) BuiltinType(K); 155 R = CanQualType::CreateUnsafe(QualType(Ty, 0)); 156 Types.push_back(Ty); 157} 158 159void ASTContext::InitBuiltinTypes() { 160 assert(VoidTy.isNull() && "Context reinitialized?"); 161 162 // C99 6.2.5p19. 163 InitBuiltinType(VoidTy, BuiltinType::Void); 164 165 // C99 6.2.5p2. 166 InitBuiltinType(BoolTy, BuiltinType::Bool); 167 // C99 6.2.5p3. 168 if (LangOpts.CharIsSigned) 169 InitBuiltinType(CharTy, BuiltinType::Char_S); 170 else 171 InitBuiltinType(CharTy, BuiltinType::Char_U); 172 // C99 6.2.5p4. 173 InitBuiltinType(SignedCharTy, BuiltinType::SChar); 174 InitBuiltinType(ShortTy, BuiltinType::Short); 175 InitBuiltinType(IntTy, BuiltinType::Int); 176 InitBuiltinType(LongTy, BuiltinType::Long); 177 InitBuiltinType(LongLongTy, BuiltinType::LongLong); 178 179 // C99 6.2.5p6. 180 InitBuiltinType(UnsignedCharTy, BuiltinType::UChar); 181 InitBuiltinType(UnsignedShortTy, BuiltinType::UShort); 182 InitBuiltinType(UnsignedIntTy, BuiltinType::UInt); 183 InitBuiltinType(UnsignedLongTy, BuiltinType::ULong); 184 InitBuiltinType(UnsignedLongLongTy, BuiltinType::ULongLong); 185 186 // C99 6.2.5p10. 187 InitBuiltinType(FloatTy, BuiltinType::Float); 188 InitBuiltinType(DoubleTy, BuiltinType::Double); 189 InitBuiltinType(LongDoubleTy, BuiltinType::LongDouble); 190 191 // GNU extension, 128-bit integers. 192 InitBuiltinType(Int128Ty, BuiltinType::Int128); 193 InitBuiltinType(UnsignedInt128Ty, BuiltinType::UInt128); 194 195 if (LangOpts.CPlusPlus) // C++ 3.9.1p5 196 InitBuiltinType(WCharTy, BuiltinType::WChar); 197 else // C99 198 WCharTy = getFromTargetType(Target.getWCharType()); 199 200 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 201 InitBuiltinType(Char16Ty, BuiltinType::Char16); 202 else // C99 203 Char16Ty = getFromTargetType(Target.getChar16Type()); 204 205 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 206 InitBuiltinType(Char32Ty, BuiltinType::Char32); 207 else // C99 208 Char32Ty = getFromTargetType(Target.getChar32Type()); 209 210 // Placeholder type for functions. 211 InitBuiltinType(OverloadTy, BuiltinType::Overload); 212 213 // Placeholder type for type-dependent expressions whose type is 214 // completely unknown. No code should ever check a type against 215 // DependentTy and users should never see it; however, it is here to 216 // help diagnose failures to properly check for type-dependent 217 // expressions. 218 InitBuiltinType(DependentTy, BuiltinType::Dependent); 219 220 // Placeholder type for C++0x auto declarations whose real type has 221 // not yet been deduced. 222 InitBuiltinType(UndeducedAutoTy, BuiltinType::UndeducedAuto); 223 224 // C99 6.2.5p11. 225 FloatComplexTy = getComplexType(FloatTy); 226 DoubleComplexTy = getComplexType(DoubleTy); 227 LongDoubleComplexTy = getComplexType(LongDoubleTy); 228 229 BuiltinVaListType = QualType(); 230 231 // "Builtin" typedefs set by Sema::ActOnTranslationUnitScope(). 232 ObjCIdTypedefType = QualType(); 233 ObjCClassTypedefType = QualType(); 234 ObjCSelTypedefType = QualType(); 235 236 // Builtin types for 'id', 'Class', and 'SEL'. 237 InitBuiltinType(ObjCBuiltinIdTy, BuiltinType::ObjCId); 238 InitBuiltinType(ObjCBuiltinClassTy, BuiltinType::ObjCClass); 239 InitBuiltinType(ObjCBuiltinSelTy, BuiltinType::ObjCSel); 240 241 ObjCConstantStringType = QualType(); 242 243 // void * type 244 VoidPtrTy = getPointerType(VoidTy); 245 246 // nullptr type (C++0x 2.14.7) 247 InitBuiltinType(NullPtrTy, BuiltinType::NullPtr); 248} 249 250MemberSpecializationInfo * 251ASTContext::getInstantiatedFromStaticDataMember(const VarDecl *Var) { 252 assert(Var->isStaticDataMember() && "Not a static data member"); 253 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *>::iterator Pos 254 = InstantiatedFromStaticDataMember.find(Var); 255 if (Pos == InstantiatedFromStaticDataMember.end()) 256 return 0; 257 258 return Pos->second; 259} 260 261void 262ASTContext::setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 263 TemplateSpecializationKind TSK) { 264 assert(Inst->isStaticDataMember() && "Not a static data member"); 265 assert(Tmpl->isStaticDataMember() && "Not a static data member"); 266 assert(!InstantiatedFromStaticDataMember[Inst] && 267 "Already noted what static data member was instantiated from"); 268 InstantiatedFromStaticDataMember[Inst] 269 = new (*this) MemberSpecializationInfo(Tmpl, TSK); 270} 271 272NamedDecl * 273ASTContext::getInstantiatedFromUsingDecl(UsingDecl *UUD) { 274 llvm::DenseMap<UsingDecl *, NamedDecl *>::const_iterator Pos 275 = InstantiatedFromUsingDecl.find(UUD); 276 if (Pos == InstantiatedFromUsingDecl.end()) 277 return 0; 278 279 return Pos->second; 280} 281 282void 283ASTContext::setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern) { 284 assert((isa<UsingDecl>(Pattern) || 285 isa<UnresolvedUsingValueDecl>(Pattern) || 286 isa<UnresolvedUsingTypenameDecl>(Pattern)) && 287 "pattern decl is not a using decl"); 288 assert(!InstantiatedFromUsingDecl[Inst] && "pattern already exists"); 289 InstantiatedFromUsingDecl[Inst] = Pattern; 290} 291 292UsingShadowDecl * 293ASTContext::getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst) { 294 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*>::const_iterator Pos 295 = InstantiatedFromUsingShadowDecl.find(Inst); 296 if (Pos == InstantiatedFromUsingShadowDecl.end()) 297 return 0; 298 299 return Pos->second; 300} 301 302void 303ASTContext::setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 304 UsingShadowDecl *Pattern) { 305 assert(!InstantiatedFromUsingShadowDecl[Inst] && "pattern already exists"); 306 InstantiatedFromUsingShadowDecl[Inst] = Pattern; 307} 308 309FieldDecl *ASTContext::getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field) { 310 llvm::DenseMap<FieldDecl *, FieldDecl *>::iterator Pos 311 = InstantiatedFromUnnamedFieldDecl.find(Field); 312 if (Pos == InstantiatedFromUnnamedFieldDecl.end()) 313 return 0; 314 315 return Pos->second; 316} 317 318void ASTContext::setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, 319 FieldDecl *Tmpl) { 320 assert(!Inst->getDeclName() && "Instantiated field decl is not unnamed"); 321 assert(!Tmpl->getDeclName() && "Template field decl is not unnamed"); 322 assert(!InstantiatedFromUnnamedFieldDecl[Inst] && 323 "Already noted what unnamed field was instantiated from"); 324 325 InstantiatedFromUnnamedFieldDecl[Inst] = Tmpl; 326} 327 328CXXMethodVector::iterator CXXMethodVector::begin() const { 329 if ((Storage & 0x01) == 0) 330 return reinterpret_cast<iterator>(&Storage); 331 332 vector_type *Vec = reinterpret_cast<vector_type *>(Storage & ~0x01); 333 return &Vec->front(); 334} 335 336CXXMethodVector::iterator CXXMethodVector::end() const { 337 if ((Storage & 0x01) == 0) { 338 if (Storage == 0) 339 return reinterpret_cast<iterator>(&Storage); 340 341 return reinterpret_cast<iterator>(&Storage) + 1; 342 } 343 344 vector_type *Vec = reinterpret_cast<vector_type *>(Storage & ~0x01); 345 return &Vec->front() + Vec->size(); 346} 347 348void CXXMethodVector::push_back(const CXXMethodDecl *Method) { 349 if (Storage == 0) { 350 // 0 -> 1 element. 351 Storage = reinterpret_cast<uintptr_t>(Method); 352 return; 353 } 354 355 vector_type *Vec; 356 if ((Storage & 0x01) == 0) { 357 // 1 -> 2 elements. Allocate a new vector and push the element into that 358 // vector. 359 Vec = new vector_type; 360 Vec->push_back(reinterpret_cast<const CXXMethodDecl *>(Storage)); 361 Storage = reinterpret_cast<uintptr_t>(Vec) | 0x01; 362 } else 363 Vec = reinterpret_cast<vector_type *>(Storage & ~0x01); 364 365 // Add the new method to the vector. 366 Vec->push_back(Method); 367} 368 369void CXXMethodVector::Destroy() { 370 if (Storage & 0x01) 371 delete reinterpret_cast<vector_type *>(Storage & ~0x01); 372 373 Storage = 0; 374} 375 376 377ASTContext::overridden_cxx_method_iterator 378ASTContext::overridden_methods_begin(const CXXMethodDecl *Method) const { 379 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 380 = OverriddenMethods.find(Method); 381 if (Pos == OverriddenMethods.end()) 382 return 0; 383 384 return Pos->second.begin(); 385} 386 387ASTContext::overridden_cxx_method_iterator 388ASTContext::overridden_methods_end(const CXXMethodDecl *Method) const { 389 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 390 = OverriddenMethods.find(Method); 391 if (Pos == OverriddenMethods.end()) 392 return 0; 393 394 return Pos->second.end(); 395} 396 397void ASTContext::addOverriddenMethod(const CXXMethodDecl *Method, 398 const CXXMethodDecl *Overridden) { 399 OverriddenMethods[Method].push_back(Overridden); 400} 401 402namespace { 403 class BeforeInTranslationUnit 404 : std::binary_function<SourceRange, SourceRange, bool> { 405 SourceManager *SourceMgr; 406 407 public: 408 explicit BeforeInTranslationUnit(SourceManager *SM) : SourceMgr(SM) { } 409 410 bool operator()(SourceRange X, SourceRange Y) { 411 return SourceMgr->isBeforeInTranslationUnit(X.getBegin(), Y.getBegin()); 412 } 413 }; 414} 415 416//===----------------------------------------------------------------------===// 417// Type Sizing and Analysis 418//===----------------------------------------------------------------------===// 419 420/// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 421/// scalar floating point type. 422const llvm::fltSemantics &ASTContext::getFloatTypeSemantics(QualType T) const { 423 const BuiltinType *BT = T->getAs<BuiltinType>(); 424 assert(BT && "Not a floating point type!"); 425 switch (BT->getKind()) { 426 default: assert(0 && "Not a floating point type!"); 427 case BuiltinType::Float: return Target.getFloatFormat(); 428 case BuiltinType::Double: return Target.getDoubleFormat(); 429 case BuiltinType::LongDouble: return Target.getLongDoubleFormat(); 430 } 431} 432 433/// getDeclAlign - Return a conservative estimate of the alignment of the 434/// specified decl. Note that bitfields do not have a valid alignment, so 435/// this method will assert on them. 436/// If @p RefAsPointee, references are treated like their underlying type 437/// (for alignof), else they're treated like pointers (for CodeGen). 438CharUnits ASTContext::getDeclAlign(const Decl *D, bool RefAsPointee) { 439 unsigned Align = Target.getCharWidth(); 440 441 if (const AlignedAttr* AA = D->getAttr<AlignedAttr>()) 442 Align = std::max(Align, AA->getMaxAlignment()); 443 444 if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) { 445 QualType T = VD->getType(); 446 if (const ReferenceType* RT = T->getAs<ReferenceType>()) { 447 if (RefAsPointee) 448 T = RT->getPointeeType(); 449 else 450 T = getPointerType(RT->getPointeeType()); 451 } 452 if (!T->isIncompleteType() && !T->isFunctionType()) { 453 // Incomplete or function types default to 1. 454 while (isa<VariableArrayType>(T) || isa<IncompleteArrayType>(T)) 455 T = cast<ArrayType>(T)->getElementType(); 456 457 Align = std::max(Align, getPreferredTypeAlign(T.getTypePtr())); 458 } 459 if (const FieldDecl *FD = dyn_cast<FieldDecl>(VD)) { 460 // In the case of a field in a packed struct, we want the minimum 461 // of the alignment of the field and the alignment of the struct. 462 Align = std::min(Align, 463 getPreferredTypeAlign(FD->getParent()->getTypeForDecl())); 464 } 465 } 466 467 return CharUnits::fromQuantity(Align / Target.getCharWidth()); 468} 469 470/// getTypeSize - Return the size of the specified type, in bits. This method 471/// does not work on incomplete types. 472/// 473/// FIXME: Pointers into different addr spaces could have different sizes and 474/// alignment requirements: getPointerInfo should take an AddrSpace, this 475/// should take a QualType, &c. 476std::pair<uint64_t, unsigned> 477ASTContext::getTypeInfo(const Type *T) { 478 uint64_t Width=0; 479 unsigned Align=8; 480 switch (T->getTypeClass()) { 481#define TYPE(Class, Base) 482#define ABSTRACT_TYPE(Class, Base) 483#define NON_CANONICAL_TYPE(Class, Base) 484#define DEPENDENT_TYPE(Class, Base) case Type::Class: 485#include "clang/AST/TypeNodes.def" 486 assert(false && "Should not see dependent types"); 487 break; 488 489 case Type::FunctionNoProto: 490 case Type::FunctionProto: 491 // GCC extension: alignof(function) = 32 bits 492 Width = 0; 493 Align = 32; 494 break; 495 496 case Type::IncompleteArray: 497 case Type::VariableArray: 498 Width = 0; 499 Align = getTypeAlign(cast<ArrayType>(T)->getElementType()); 500 break; 501 502 case Type::ConstantArray: { 503 const ConstantArrayType *CAT = cast<ConstantArrayType>(T); 504 505 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(CAT->getElementType()); 506 Width = EltInfo.first*CAT->getSize().getZExtValue(); 507 Align = EltInfo.second; 508 break; 509 } 510 case Type::ExtVector: 511 case Type::Vector: { 512 const VectorType *VT = cast<VectorType>(T); 513 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(VT->getElementType()); 514 Width = EltInfo.first*VT->getNumElements(); 515 Align = Width; 516 // If the alignment is not a power of 2, round up to the next power of 2. 517 // This happens for non-power-of-2 length vectors. 518 if (VT->getNumElements() & (VT->getNumElements()-1)) { 519 Align = llvm::NextPowerOf2(Align); 520 Width = llvm::RoundUpToAlignment(Width, Align); 521 } 522 break; 523 } 524 525 case Type::Builtin: 526 switch (cast<BuiltinType>(T)->getKind()) { 527 default: assert(0 && "Unknown builtin type!"); 528 case BuiltinType::Void: 529 // GCC extension: alignof(void) = 8 bits. 530 Width = 0; 531 Align = 8; 532 break; 533 534 case BuiltinType::Bool: 535 Width = Target.getBoolWidth(); 536 Align = Target.getBoolAlign(); 537 break; 538 case BuiltinType::Char_S: 539 case BuiltinType::Char_U: 540 case BuiltinType::UChar: 541 case BuiltinType::SChar: 542 Width = Target.getCharWidth(); 543 Align = Target.getCharAlign(); 544 break; 545 case BuiltinType::WChar: 546 Width = Target.getWCharWidth(); 547 Align = Target.getWCharAlign(); 548 break; 549 case BuiltinType::Char16: 550 Width = Target.getChar16Width(); 551 Align = Target.getChar16Align(); 552 break; 553 case BuiltinType::Char32: 554 Width = Target.getChar32Width(); 555 Align = Target.getChar32Align(); 556 break; 557 case BuiltinType::UShort: 558 case BuiltinType::Short: 559 Width = Target.getShortWidth(); 560 Align = Target.getShortAlign(); 561 break; 562 case BuiltinType::UInt: 563 case BuiltinType::Int: 564 Width = Target.getIntWidth(); 565 Align = Target.getIntAlign(); 566 break; 567 case BuiltinType::ULong: 568 case BuiltinType::Long: 569 Width = Target.getLongWidth(); 570 Align = Target.getLongAlign(); 571 break; 572 case BuiltinType::ULongLong: 573 case BuiltinType::LongLong: 574 Width = Target.getLongLongWidth(); 575 Align = Target.getLongLongAlign(); 576 break; 577 case BuiltinType::Int128: 578 case BuiltinType::UInt128: 579 Width = 128; 580 Align = 128; // int128_t is 128-bit aligned on all targets. 581 break; 582 case BuiltinType::Float: 583 Width = Target.getFloatWidth(); 584 Align = Target.getFloatAlign(); 585 break; 586 case BuiltinType::Double: 587 Width = Target.getDoubleWidth(); 588 Align = Target.getDoubleAlign(); 589 break; 590 case BuiltinType::LongDouble: 591 Width = Target.getLongDoubleWidth(); 592 Align = Target.getLongDoubleAlign(); 593 break; 594 case BuiltinType::NullPtr: 595 Width = Target.getPointerWidth(0); // C++ 3.9.1p11: sizeof(nullptr_t) 596 Align = Target.getPointerAlign(0); // == sizeof(void*) 597 break; 598 } 599 break; 600 case Type::ObjCObjectPointer: 601 Width = Target.getPointerWidth(0); 602 Align = Target.getPointerAlign(0); 603 break; 604 case Type::BlockPointer: { 605 unsigned AS = cast<BlockPointerType>(T)->getPointeeType().getAddressSpace(); 606 Width = Target.getPointerWidth(AS); 607 Align = Target.getPointerAlign(AS); 608 break; 609 } 610 case Type::LValueReference: 611 case Type::RValueReference: { 612 // alignof and sizeof should never enter this code path here, so we go 613 // the pointer route. 614 unsigned AS = cast<ReferenceType>(T)->getPointeeType().getAddressSpace(); 615 Width = Target.getPointerWidth(AS); 616 Align = Target.getPointerAlign(AS); 617 break; 618 } 619 case Type::Pointer: { 620 unsigned AS = cast<PointerType>(T)->getPointeeType().getAddressSpace(); 621 Width = Target.getPointerWidth(AS); 622 Align = Target.getPointerAlign(AS); 623 break; 624 } 625 case Type::MemberPointer: { 626 QualType Pointee = cast<MemberPointerType>(T)->getPointeeType(); 627 std::pair<uint64_t, unsigned> PtrDiffInfo = 628 getTypeInfo(getPointerDiffType()); 629 Width = PtrDiffInfo.first; 630 if (Pointee->isFunctionType()) 631 Width *= 2; 632 Align = PtrDiffInfo.second; 633 break; 634 } 635 case Type::Complex: { 636 // Complex types have the same alignment as their elements, but twice the 637 // size. 638 std::pair<uint64_t, unsigned> EltInfo = 639 getTypeInfo(cast<ComplexType>(T)->getElementType()); 640 Width = EltInfo.first*2; 641 Align = EltInfo.second; 642 break; 643 } 644 case Type::ObjCInterface: { 645 const ObjCInterfaceType *ObjCI = cast<ObjCInterfaceType>(T); 646 const ASTRecordLayout &Layout = getASTObjCInterfaceLayout(ObjCI->getDecl()); 647 Width = Layout.getSize(); 648 Align = Layout.getAlignment(); 649 break; 650 } 651 case Type::Record: 652 case Type::Enum: { 653 const TagType *TT = cast<TagType>(T); 654 655 if (TT->getDecl()->isInvalidDecl()) { 656 Width = 1; 657 Align = 1; 658 break; 659 } 660 661 if (const EnumType *ET = dyn_cast<EnumType>(TT)) 662 return getTypeInfo(ET->getDecl()->getIntegerType()); 663 664 const RecordType *RT = cast<RecordType>(TT); 665 const ASTRecordLayout &Layout = getASTRecordLayout(RT->getDecl()); 666 Width = Layout.getSize(); 667 Align = Layout.getAlignment(); 668 break; 669 } 670 671 case Type::SubstTemplateTypeParm: 672 return getTypeInfo(cast<SubstTemplateTypeParmType>(T)-> 673 getReplacementType().getTypePtr()); 674 675 case Type::Elaborated: 676 return getTypeInfo(cast<ElaboratedType>(T)->getUnderlyingType() 677 .getTypePtr()); 678 679 case Type::Typedef: { 680 const TypedefDecl *Typedef = cast<TypedefType>(T)->getDecl(); 681 if (const AlignedAttr *Aligned = Typedef->getAttr<AlignedAttr>()) { 682 Align = std::max(Aligned->getMaxAlignment(), 683 getTypeAlign(Typedef->getUnderlyingType().getTypePtr())); 684 Width = getTypeSize(Typedef->getUnderlyingType().getTypePtr()); 685 } else 686 return getTypeInfo(Typedef->getUnderlyingType().getTypePtr()); 687 break; 688 } 689 690 case Type::TypeOfExpr: 691 return getTypeInfo(cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType() 692 .getTypePtr()); 693 694 case Type::TypeOf: 695 return getTypeInfo(cast<TypeOfType>(T)->getUnderlyingType().getTypePtr()); 696 697 case Type::Decltype: 698 return getTypeInfo(cast<DecltypeType>(T)->getUnderlyingExpr()->getType() 699 .getTypePtr()); 700 701 case Type::QualifiedName: 702 return getTypeInfo(cast<QualifiedNameType>(T)->getNamedType().getTypePtr()); 703 704 case Type::InjectedClassName: 705 return getTypeInfo(cast<InjectedClassNameType>(T) 706 ->getUnderlyingType().getTypePtr()); 707 708 case Type::TemplateSpecialization: 709 assert(getCanonicalType(T) != T && 710 "Cannot request the size of a dependent type"); 711 // FIXME: this is likely to be wrong once we support template 712 // aliases, since a template alias could refer to a typedef that 713 // has an __aligned__ attribute on it. 714 return getTypeInfo(getCanonicalType(T)); 715 } 716 717 assert(Align && (Align & (Align-1)) == 0 && "Alignment must be power of 2"); 718 return std::make_pair(Width, Align); 719} 720 721/// getTypeSizeInChars - Return the size of the specified type, in characters. 722/// This method does not work on incomplete types. 723CharUnits ASTContext::getTypeSizeInChars(QualType T) { 724 return CharUnits::fromQuantity(getTypeSize(T) / getCharWidth()); 725} 726CharUnits ASTContext::getTypeSizeInChars(const Type *T) { 727 return CharUnits::fromQuantity(getTypeSize(T) / getCharWidth()); 728} 729 730/// getTypeAlignInChars - Return the ABI-specified alignment of a type, in 731/// characters. This method does not work on incomplete types. 732CharUnits ASTContext::getTypeAlignInChars(QualType T) { 733 return CharUnits::fromQuantity(getTypeAlign(T) / getCharWidth()); 734} 735CharUnits ASTContext::getTypeAlignInChars(const Type *T) { 736 return CharUnits::fromQuantity(getTypeAlign(T) / getCharWidth()); 737} 738 739/// getPreferredTypeAlign - Return the "preferred" alignment of the specified 740/// type for the current target in bits. This can be different than the ABI 741/// alignment in cases where it is beneficial for performance to overalign 742/// a data type. 743unsigned ASTContext::getPreferredTypeAlign(const Type *T) { 744 unsigned ABIAlign = getTypeAlign(T); 745 746 // Double and long long should be naturally aligned if possible. 747 if (const ComplexType* CT = T->getAs<ComplexType>()) 748 T = CT->getElementType().getTypePtr(); 749 if (T->isSpecificBuiltinType(BuiltinType::Double) || 750 T->isSpecificBuiltinType(BuiltinType::LongLong)) 751 return std::max(ABIAlign, (unsigned)getTypeSize(T)); 752 753 return ABIAlign; 754} 755 756static void CollectLocalObjCIvars(ASTContext *Ctx, 757 const ObjCInterfaceDecl *OI, 758 llvm::SmallVectorImpl<FieldDecl*> &Fields) { 759 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 760 E = OI->ivar_end(); I != E; ++I) { 761 ObjCIvarDecl *IVDecl = *I; 762 if (!IVDecl->isInvalidDecl()) 763 Fields.push_back(cast<FieldDecl>(IVDecl)); 764 } 765} 766 767void ASTContext::CollectObjCIvars(const ObjCInterfaceDecl *OI, 768 llvm::SmallVectorImpl<FieldDecl*> &Fields) { 769 if (const ObjCInterfaceDecl *SuperClass = OI->getSuperClass()) 770 CollectObjCIvars(SuperClass, Fields); 771 CollectLocalObjCIvars(this, OI, Fields); 772} 773 774/// ShallowCollectObjCIvars - 775/// Collect all ivars, including those synthesized, in the current class. 776/// 777void ASTContext::ShallowCollectObjCIvars(const ObjCInterfaceDecl *OI, 778 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 779 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 780 E = OI->ivar_end(); I != E; ++I) { 781 Ivars.push_back(*I); 782 } 783 784 CollectNonClassIvars(OI, Ivars); 785} 786 787/// CollectNonClassIvars - 788/// This routine collects all other ivars which are not declared in the class. 789/// This includes synthesized ivars (via @synthesize) and those in 790// class's @implementation. 791/// 792void ASTContext::CollectNonClassIvars(const ObjCInterfaceDecl *OI, 793 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 794 // Find ivars declared in class extension. 795 if (const ObjCCategoryDecl *CDecl = OI->getClassExtension()) { 796 for (ObjCCategoryDecl::ivar_iterator I = CDecl->ivar_begin(), 797 E = CDecl->ivar_end(); I != E; ++I) { 798 Ivars.push_back(*I); 799 } 800 } 801 802 // Also add any ivar defined in this class's implementation. This 803 // includes synthesized ivars. 804 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) { 805 for (ObjCImplementationDecl::ivar_iterator I = ImplDecl->ivar_begin(), 806 E = ImplDecl->ivar_end(); I != E; ++I) 807 Ivars.push_back(*I); 808 } 809} 810 811/// CollectInheritedProtocols - Collect all protocols in current class and 812/// those inherited by it. 813void ASTContext::CollectInheritedProtocols(const Decl *CDecl, 814 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols) { 815 if (const ObjCInterfaceDecl *OI = dyn_cast<ObjCInterfaceDecl>(CDecl)) { 816 for (ObjCInterfaceDecl::protocol_iterator P = OI->protocol_begin(), 817 PE = OI->protocol_end(); P != PE; ++P) { 818 ObjCProtocolDecl *Proto = (*P); 819 Protocols.insert(Proto); 820 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 821 PE = Proto->protocol_end(); P != PE; ++P) { 822 Protocols.insert(*P); 823 CollectInheritedProtocols(*P, Protocols); 824 } 825 } 826 827 // Categories of this Interface. 828 for (const ObjCCategoryDecl *CDeclChain = OI->getCategoryList(); 829 CDeclChain; CDeclChain = CDeclChain->getNextClassCategory()) 830 CollectInheritedProtocols(CDeclChain, Protocols); 831 if (ObjCInterfaceDecl *SD = OI->getSuperClass()) 832 while (SD) { 833 CollectInheritedProtocols(SD, Protocols); 834 SD = SD->getSuperClass(); 835 } 836 return; 837 } 838 if (const ObjCCategoryDecl *OC = dyn_cast<ObjCCategoryDecl>(CDecl)) { 839 for (ObjCInterfaceDecl::protocol_iterator P = OC->protocol_begin(), 840 PE = OC->protocol_end(); P != PE; ++P) { 841 ObjCProtocolDecl *Proto = (*P); 842 Protocols.insert(Proto); 843 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 844 PE = Proto->protocol_end(); P != PE; ++P) 845 CollectInheritedProtocols(*P, Protocols); 846 } 847 return; 848 } 849 if (const ObjCProtocolDecl *OP = dyn_cast<ObjCProtocolDecl>(CDecl)) { 850 for (ObjCProtocolDecl::protocol_iterator P = OP->protocol_begin(), 851 PE = OP->protocol_end(); P != PE; ++P) { 852 ObjCProtocolDecl *Proto = (*P); 853 Protocols.insert(Proto); 854 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 855 PE = Proto->protocol_end(); P != PE; ++P) 856 CollectInheritedProtocols(*P, Protocols); 857 } 858 return; 859 } 860} 861 862unsigned ASTContext::CountNonClassIvars(const ObjCInterfaceDecl *OI) { 863 unsigned count = 0; 864 // Count ivars declared in class extension. 865 if (const ObjCCategoryDecl *CDecl = OI->getClassExtension()) { 866 for (ObjCCategoryDecl::ivar_iterator I = CDecl->ivar_begin(), 867 E = CDecl->ivar_end(); I != E; ++I) { 868 ++count; 869 } 870 } 871 872 // Count ivar defined in this class's implementation. This 873 // includes synthesized ivars. 874 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) 875 for (ObjCImplementationDecl::ivar_iterator I = ImplDecl->ivar_begin(), 876 E = ImplDecl->ivar_end(); I != E; ++I) 877 ++count; 878 return count; 879} 880 881/// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 882ObjCImplementationDecl *ASTContext::getObjCImplementation(ObjCInterfaceDecl *D) { 883 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 884 I = ObjCImpls.find(D); 885 if (I != ObjCImpls.end()) 886 return cast<ObjCImplementationDecl>(I->second); 887 return 0; 888} 889/// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 890ObjCCategoryImplDecl *ASTContext::getObjCImplementation(ObjCCategoryDecl *D) { 891 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 892 I = ObjCImpls.find(D); 893 if (I != ObjCImpls.end()) 894 return cast<ObjCCategoryImplDecl>(I->second); 895 return 0; 896} 897 898/// \brief Set the implementation of ObjCInterfaceDecl. 899void ASTContext::setObjCImplementation(ObjCInterfaceDecl *IFaceD, 900 ObjCImplementationDecl *ImplD) { 901 assert(IFaceD && ImplD && "Passed null params"); 902 ObjCImpls[IFaceD] = ImplD; 903} 904/// \brief Set the implementation of ObjCCategoryDecl. 905void ASTContext::setObjCImplementation(ObjCCategoryDecl *CatD, 906 ObjCCategoryImplDecl *ImplD) { 907 assert(CatD && ImplD && "Passed null params"); 908 ObjCImpls[CatD] = ImplD; 909} 910 911/// \brief Allocate an uninitialized TypeSourceInfo. 912/// 913/// The caller should initialize the memory held by TypeSourceInfo using 914/// the TypeLoc wrappers. 915/// 916/// \param T the type that will be the basis for type source info. This type 917/// should refer to how the declarator was written in source code, not to 918/// what type semantic analysis resolved the declarator to. 919TypeSourceInfo *ASTContext::CreateTypeSourceInfo(QualType T, 920 unsigned DataSize) { 921 if (!DataSize) 922 DataSize = TypeLoc::getFullDataSizeForType(T); 923 else 924 assert(DataSize == TypeLoc::getFullDataSizeForType(T) && 925 "incorrect data size provided to CreateTypeSourceInfo!"); 926 927 TypeSourceInfo *TInfo = 928 (TypeSourceInfo*)BumpAlloc.Allocate(sizeof(TypeSourceInfo) + DataSize, 8); 929 new (TInfo) TypeSourceInfo(T); 930 return TInfo; 931} 932 933TypeSourceInfo *ASTContext::getTrivialTypeSourceInfo(QualType T, 934 SourceLocation L) { 935 TypeSourceInfo *DI = CreateTypeSourceInfo(T); 936 DI->getTypeLoc().initialize(L); 937 return DI; 938} 939 940/// getInterfaceLayoutImpl - Get or compute information about the 941/// layout of the given interface. 942/// 943/// \param Impl - If given, also include the layout of the interface's 944/// implementation. This may differ by including synthesized ivars. 945const ASTRecordLayout & 946ASTContext::getObjCLayout(const ObjCInterfaceDecl *D, 947 const ObjCImplementationDecl *Impl) { 948 assert(!D->isForwardDecl() && "Invalid interface decl!"); 949 950 // Look up this layout, if already laid out, return what we have. 951 ObjCContainerDecl *Key = 952 Impl ? (ObjCContainerDecl*) Impl : (ObjCContainerDecl*) D; 953 if (const ASTRecordLayout *Entry = ObjCLayouts[Key]) 954 return *Entry; 955 956 // Add in synthesized ivar count if laying out an implementation. 957 if (Impl) { 958 unsigned SynthCount = CountNonClassIvars(D); 959 // If there aren't any sythesized ivars then reuse the interface 960 // entry. Note we can't cache this because we simply free all 961 // entries later; however we shouldn't look up implementations 962 // frequently. 963 if (SynthCount == 0) 964 return getObjCLayout(D, 0); 965 } 966 967 const ASTRecordLayout *NewEntry = 968 ASTRecordLayoutBuilder::ComputeLayout(*this, D, Impl); 969 ObjCLayouts[Key] = NewEntry; 970 971 return *NewEntry; 972} 973 974const ASTRecordLayout & 975ASTContext::getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) { 976 return getObjCLayout(D, 0); 977} 978 979const ASTRecordLayout & 980ASTContext::getASTObjCImplementationLayout(const ObjCImplementationDecl *D) { 981 return getObjCLayout(D->getClassInterface(), D); 982} 983 984/// getASTRecordLayout - Get or compute information about the layout of the 985/// specified record (struct/union/class), which indicates its size and field 986/// position information. 987const ASTRecordLayout &ASTContext::getASTRecordLayout(const RecordDecl *D) { 988 D = D->getDefinition(); 989 assert(D && "Cannot get layout of forward declarations!"); 990 991 // Look up this layout, if already laid out, return what we have. 992 // Note that we can't save a reference to the entry because this function 993 // is recursive. 994 const ASTRecordLayout *Entry = ASTRecordLayouts[D]; 995 if (Entry) return *Entry; 996 997 const ASTRecordLayout *NewEntry = 998 ASTRecordLayoutBuilder::ComputeLayout(*this, D); 999 ASTRecordLayouts[D] = NewEntry; 1000 1001 return *NewEntry; 1002} 1003 1004const CXXMethodDecl *ASTContext::getKeyFunction(const CXXRecordDecl *RD) { 1005 RD = cast<CXXRecordDecl>(RD->getDefinition()); 1006 assert(RD && "Cannot get key function for forward declarations!"); 1007 1008 const CXXMethodDecl *&Entry = KeyFunctions[RD]; 1009 if (!Entry) 1010 Entry = ASTRecordLayoutBuilder::ComputeKeyFunction(RD); 1011 else 1012 assert(Entry == ASTRecordLayoutBuilder::ComputeKeyFunction(RD) && 1013 "Key function changed!"); 1014 1015 return Entry; 1016} 1017 1018//===----------------------------------------------------------------------===// 1019// Type creation/memoization methods 1020//===----------------------------------------------------------------------===// 1021 1022QualType ASTContext::getExtQualType(const Type *TypeNode, Qualifiers Quals) { 1023 unsigned Fast = Quals.getFastQualifiers(); 1024 Quals.removeFastQualifiers(); 1025 1026 // Check if we've already instantiated this type. 1027 llvm::FoldingSetNodeID ID; 1028 ExtQuals::Profile(ID, TypeNode, Quals); 1029 void *InsertPos = 0; 1030 if (ExtQuals *EQ = ExtQualNodes.FindNodeOrInsertPos(ID, InsertPos)) { 1031 assert(EQ->getQualifiers() == Quals); 1032 QualType T = QualType(EQ, Fast); 1033 return T; 1034 } 1035 1036 ExtQuals *New = new (*this, TypeAlignment) ExtQuals(*this, TypeNode, Quals); 1037 ExtQualNodes.InsertNode(New, InsertPos); 1038 QualType T = QualType(New, Fast); 1039 return T; 1040} 1041 1042QualType ASTContext::getVolatileType(QualType T) { 1043 QualType CanT = getCanonicalType(T); 1044 if (CanT.isVolatileQualified()) return T; 1045 1046 QualifierCollector Quals; 1047 const Type *TypeNode = Quals.strip(T); 1048 Quals.addVolatile(); 1049 1050 return getExtQualType(TypeNode, Quals); 1051} 1052 1053QualType ASTContext::getAddrSpaceQualType(QualType T, unsigned AddressSpace) { 1054 QualType CanT = getCanonicalType(T); 1055 if (CanT.getAddressSpace() == AddressSpace) 1056 return T; 1057 1058 // If we are composing extended qualifiers together, merge together 1059 // into one ExtQuals node. 1060 QualifierCollector Quals; 1061 const Type *TypeNode = Quals.strip(T); 1062 1063 // If this type already has an address space specified, it cannot get 1064 // another one. 1065 assert(!Quals.hasAddressSpace() && 1066 "Type cannot be in multiple addr spaces!"); 1067 Quals.addAddressSpace(AddressSpace); 1068 1069 return getExtQualType(TypeNode, Quals); 1070} 1071 1072QualType ASTContext::getObjCGCQualType(QualType T, 1073 Qualifiers::GC GCAttr) { 1074 QualType CanT = getCanonicalType(T); 1075 if (CanT.getObjCGCAttr() == GCAttr) 1076 return T; 1077 1078 if (T->isPointerType()) { 1079 QualType Pointee = T->getAs<PointerType>()->getPointeeType(); 1080 if (Pointee->isAnyPointerType()) { 1081 QualType ResultType = getObjCGCQualType(Pointee, GCAttr); 1082 return getPointerType(ResultType); 1083 } 1084 } 1085 1086 // If we are composing extended qualifiers together, merge together 1087 // into one ExtQuals node. 1088 QualifierCollector Quals; 1089 const Type *TypeNode = Quals.strip(T); 1090 1091 // If this type already has an ObjCGC specified, it cannot get 1092 // another one. 1093 assert(!Quals.hasObjCGCAttr() && 1094 "Type cannot have multiple ObjCGCs!"); 1095 Quals.addObjCGCAttr(GCAttr); 1096 1097 return getExtQualType(TypeNode, Quals); 1098} 1099 1100static QualType getExtFunctionType(ASTContext& Context, QualType T, 1101 const FunctionType::ExtInfo &Info) { 1102 QualType ResultType; 1103 if (const PointerType *Pointer = T->getAs<PointerType>()) { 1104 QualType Pointee = Pointer->getPointeeType(); 1105 ResultType = getExtFunctionType(Context, Pointee, Info); 1106 if (ResultType == Pointee) 1107 return T; 1108 1109 ResultType = Context.getPointerType(ResultType); 1110 } else if (const BlockPointerType *BlockPointer 1111 = T->getAs<BlockPointerType>()) { 1112 QualType Pointee = BlockPointer->getPointeeType(); 1113 ResultType = getExtFunctionType(Context, Pointee, Info); 1114 if (ResultType == Pointee) 1115 return T; 1116 1117 ResultType = Context.getBlockPointerType(ResultType); 1118 } else if (const FunctionType *F = T->getAs<FunctionType>()) { 1119 if (F->getExtInfo() == Info) 1120 return T; 1121 1122 if (const FunctionNoProtoType *FNPT = dyn_cast<FunctionNoProtoType>(F)) { 1123 ResultType = Context.getFunctionNoProtoType(FNPT->getResultType(), 1124 Info); 1125 } else { 1126 const FunctionProtoType *FPT = cast<FunctionProtoType>(F); 1127 ResultType 1128 = Context.getFunctionType(FPT->getResultType(), FPT->arg_type_begin(), 1129 FPT->getNumArgs(), FPT->isVariadic(), 1130 FPT->getTypeQuals(), 1131 FPT->hasExceptionSpec(), 1132 FPT->hasAnyExceptionSpec(), 1133 FPT->getNumExceptions(), 1134 FPT->exception_begin(), 1135 Info); 1136 } 1137 } else 1138 return T; 1139 1140 return Context.getQualifiedType(ResultType, T.getLocalQualifiers()); 1141} 1142 1143QualType ASTContext::getNoReturnType(QualType T, bool AddNoReturn) { 1144 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1145 return getExtFunctionType(*this, T, 1146 Info.withNoReturn(AddNoReturn)); 1147} 1148 1149QualType ASTContext::getCallConvType(QualType T, CallingConv CallConv) { 1150 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1151 return getExtFunctionType(*this, T, 1152 Info.withCallingConv(CallConv)); 1153} 1154 1155QualType ASTContext::getRegParmType(QualType T, unsigned RegParm) { 1156 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1157 return getExtFunctionType(*this, T, 1158 Info.withRegParm(RegParm)); 1159} 1160 1161/// getComplexType - Return the uniqued reference to the type for a complex 1162/// number with the specified element type. 1163QualType ASTContext::getComplexType(QualType T) { 1164 // Unique pointers, to guarantee there is only one pointer of a particular 1165 // structure. 1166 llvm::FoldingSetNodeID ID; 1167 ComplexType::Profile(ID, T); 1168 1169 void *InsertPos = 0; 1170 if (ComplexType *CT = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos)) 1171 return QualType(CT, 0); 1172 1173 // If the pointee type isn't canonical, this won't be a canonical type either, 1174 // so fill in the canonical type field. 1175 QualType Canonical; 1176 if (!T.isCanonical()) { 1177 Canonical = getComplexType(getCanonicalType(T)); 1178 1179 // Get the new insert position for the node we care about. 1180 ComplexType *NewIP = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos); 1181 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1182 } 1183 ComplexType *New = new (*this, TypeAlignment) ComplexType(T, Canonical); 1184 Types.push_back(New); 1185 ComplexTypes.InsertNode(New, InsertPos); 1186 return QualType(New, 0); 1187} 1188 1189/// getPointerType - Return the uniqued reference to the type for a pointer to 1190/// the specified type. 1191QualType ASTContext::getPointerType(QualType T) { 1192 // Unique pointers, to guarantee there is only one pointer of a particular 1193 // structure. 1194 llvm::FoldingSetNodeID ID; 1195 PointerType::Profile(ID, T); 1196 1197 void *InsertPos = 0; 1198 if (PointerType *PT = PointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1199 return QualType(PT, 0); 1200 1201 // If the pointee type isn't canonical, this won't be a canonical type either, 1202 // so fill in the canonical type field. 1203 QualType Canonical; 1204 if (!T.isCanonical()) { 1205 Canonical = getPointerType(getCanonicalType(T)); 1206 1207 // Get the new insert position for the node we care about. 1208 PointerType *NewIP = PointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1209 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1210 } 1211 PointerType *New = new (*this, TypeAlignment) PointerType(T, Canonical); 1212 Types.push_back(New); 1213 PointerTypes.InsertNode(New, InsertPos); 1214 return QualType(New, 0); 1215} 1216 1217/// getBlockPointerType - Return the uniqued reference to the type for 1218/// a pointer to the specified block. 1219QualType ASTContext::getBlockPointerType(QualType T) { 1220 assert(T->isFunctionType() && "block of function types only"); 1221 // Unique pointers, to guarantee there is only one block of a particular 1222 // structure. 1223 llvm::FoldingSetNodeID ID; 1224 BlockPointerType::Profile(ID, T); 1225 1226 void *InsertPos = 0; 1227 if (BlockPointerType *PT = 1228 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1229 return QualType(PT, 0); 1230 1231 // If the block pointee type isn't canonical, this won't be a canonical 1232 // type either so fill in the canonical type field. 1233 QualType Canonical; 1234 if (!T.isCanonical()) { 1235 Canonical = getBlockPointerType(getCanonicalType(T)); 1236 1237 // Get the new insert position for the node we care about. 1238 BlockPointerType *NewIP = 1239 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1240 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1241 } 1242 BlockPointerType *New 1243 = new (*this, TypeAlignment) BlockPointerType(T, Canonical); 1244 Types.push_back(New); 1245 BlockPointerTypes.InsertNode(New, InsertPos); 1246 return QualType(New, 0); 1247} 1248 1249/// getLValueReferenceType - Return the uniqued reference to the type for an 1250/// lvalue reference to the specified type. 1251QualType ASTContext::getLValueReferenceType(QualType T, bool SpelledAsLValue) { 1252 // Unique pointers, to guarantee there is only one pointer of a particular 1253 // structure. 1254 llvm::FoldingSetNodeID ID; 1255 ReferenceType::Profile(ID, T, SpelledAsLValue); 1256 1257 void *InsertPos = 0; 1258 if (LValueReferenceType *RT = 1259 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1260 return QualType(RT, 0); 1261 1262 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1263 1264 // If the referencee type isn't canonical, this won't be a canonical type 1265 // either, so fill in the canonical type field. 1266 QualType Canonical; 1267 if (!SpelledAsLValue || InnerRef || !T.isCanonical()) { 1268 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1269 Canonical = getLValueReferenceType(getCanonicalType(PointeeType)); 1270 1271 // Get the new insert position for the node we care about. 1272 LValueReferenceType *NewIP = 1273 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1274 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1275 } 1276 1277 LValueReferenceType *New 1278 = new (*this, TypeAlignment) LValueReferenceType(T, Canonical, 1279 SpelledAsLValue); 1280 Types.push_back(New); 1281 LValueReferenceTypes.InsertNode(New, InsertPos); 1282 1283 return QualType(New, 0); 1284} 1285 1286/// getRValueReferenceType - Return the uniqued reference to the type for an 1287/// rvalue reference to the specified type. 1288QualType ASTContext::getRValueReferenceType(QualType T) { 1289 // Unique pointers, to guarantee there is only one pointer of a particular 1290 // structure. 1291 llvm::FoldingSetNodeID ID; 1292 ReferenceType::Profile(ID, T, false); 1293 1294 void *InsertPos = 0; 1295 if (RValueReferenceType *RT = 1296 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1297 return QualType(RT, 0); 1298 1299 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1300 1301 // If the referencee type isn't canonical, this won't be a canonical type 1302 // either, so fill in the canonical type field. 1303 QualType Canonical; 1304 if (InnerRef || !T.isCanonical()) { 1305 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1306 Canonical = getRValueReferenceType(getCanonicalType(PointeeType)); 1307 1308 // Get the new insert position for the node we care about. 1309 RValueReferenceType *NewIP = 1310 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1311 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1312 } 1313 1314 RValueReferenceType *New 1315 = new (*this, TypeAlignment) RValueReferenceType(T, Canonical); 1316 Types.push_back(New); 1317 RValueReferenceTypes.InsertNode(New, InsertPos); 1318 return QualType(New, 0); 1319} 1320 1321/// getMemberPointerType - Return the uniqued reference to the type for a 1322/// member pointer to the specified type, in the specified class. 1323QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls) { 1324 // Unique pointers, to guarantee there is only one pointer of a particular 1325 // structure. 1326 llvm::FoldingSetNodeID ID; 1327 MemberPointerType::Profile(ID, T, Cls); 1328 1329 void *InsertPos = 0; 1330 if (MemberPointerType *PT = 1331 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1332 return QualType(PT, 0); 1333 1334 // If the pointee or class type isn't canonical, this won't be a canonical 1335 // type either, so fill in the canonical type field. 1336 QualType Canonical; 1337 if (!T.isCanonical() || !Cls->isCanonicalUnqualified()) { 1338 Canonical = getMemberPointerType(getCanonicalType(T),getCanonicalType(Cls)); 1339 1340 // Get the new insert position for the node we care about. 1341 MemberPointerType *NewIP = 1342 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1343 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1344 } 1345 MemberPointerType *New 1346 = new (*this, TypeAlignment) MemberPointerType(T, Cls, Canonical); 1347 Types.push_back(New); 1348 MemberPointerTypes.InsertNode(New, InsertPos); 1349 return QualType(New, 0); 1350} 1351 1352/// getConstantArrayType - Return the unique reference to the type for an 1353/// array of the specified element type. 1354QualType ASTContext::getConstantArrayType(QualType EltTy, 1355 const llvm::APInt &ArySizeIn, 1356 ArrayType::ArraySizeModifier ASM, 1357 unsigned EltTypeQuals) { 1358 assert((EltTy->isDependentType() || 1359 EltTy->isIncompleteType() || EltTy->isConstantSizeType()) && 1360 "Constant array of VLAs is illegal!"); 1361 1362 // Convert the array size into a canonical width matching the pointer size for 1363 // the target. 1364 llvm::APInt ArySize(ArySizeIn); 1365 ArySize.zextOrTrunc(Target.getPointerWidth(EltTy.getAddressSpace())); 1366 1367 llvm::FoldingSetNodeID ID; 1368 ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, EltTypeQuals); 1369 1370 void *InsertPos = 0; 1371 if (ConstantArrayType *ATP = 1372 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1373 return QualType(ATP, 0); 1374 1375 // If the element type isn't canonical, this won't be a canonical type either, 1376 // so fill in the canonical type field. 1377 QualType Canonical; 1378 if (!EltTy.isCanonical()) { 1379 Canonical = getConstantArrayType(getCanonicalType(EltTy), ArySize, 1380 ASM, EltTypeQuals); 1381 // Get the new insert position for the node we care about. 1382 ConstantArrayType *NewIP = 1383 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1384 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1385 } 1386 1387 ConstantArrayType *New = new(*this,TypeAlignment) 1388 ConstantArrayType(EltTy, Canonical, ArySize, ASM, EltTypeQuals); 1389 ConstantArrayTypes.InsertNode(New, InsertPos); 1390 Types.push_back(New); 1391 return QualType(New, 0); 1392} 1393 1394/// getVariableArrayType - Returns a non-unique reference to the type for a 1395/// variable array of the specified element type. 1396QualType ASTContext::getVariableArrayType(QualType EltTy, 1397 Expr *NumElts, 1398 ArrayType::ArraySizeModifier ASM, 1399 unsigned EltTypeQuals, 1400 SourceRange Brackets) { 1401 // Since we don't unique expressions, it isn't possible to unique VLA's 1402 // that have an expression provided for their size. 1403 1404 VariableArrayType *New = new(*this, TypeAlignment) 1405 VariableArrayType(EltTy, QualType(), NumElts, ASM, EltTypeQuals, Brackets); 1406 1407 VariableArrayTypes.push_back(New); 1408 Types.push_back(New); 1409 return QualType(New, 0); 1410} 1411 1412/// getDependentSizedArrayType - Returns a non-unique reference to 1413/// the type for a dependently-sized array of the specified element 1414/// type. 1415QualType ASTContext::getDependentSizedArrayType(QualType EltTy, 1416 Expr *NumElts, 1417 ArrayType::ArraySizeModifier ASM, 1418 unsigned EltTypeQuals, 1419 SourceRange Brackets) { 1420 assert((!NumElts || NumElts->isTypeDependent() || 1421 NumElts->isValueDependent()) && 1422 "Size must be type- or value-dependent!"); 1423 1424 void *InsertPos = 0; 1425 DependentSizedArrayType *Canon = 0; 1426 llvm::FoldingSetNodeID ID; 1427 1428 if (NumElts) { 1429 // Dependently-sized array types that do not have a specified 1430 // number of elements will have their sizes deduced from an 1431 // initializer. 1432 DependentSizedArrayType::Profile(ID, *this, getCanonicalType(EltTy), ASM, 1433 EltTypeQuals, NumElts); 1434 1435 Canon = DependentSizedArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1436 } 1437 1438 DependentSizedArrayType *New; 1439 if (Canon) { 1440 // We already have a canonical version of this array type; use it as 1441 // the canonical type for a newly-built type. 1442 New = new (*this, TypeAlignment) 1443 DependentSizedArrayType(*this, EltTy, QualType(Canon, 0), 1444 NumElts, ASM, EltTypeQuals, Brackets); 1445 } else { 1446 QualType CanonEltTy = getCanonicalType(EltTy); 1447 if (CanonEltTy == EltTy) { 1448 New = new (*this, TypeAlignment) 1449 DependentSizedArrayType(*this, EltTy, QualType(), 1450 NumElts, ASM, EltTypeQuals, Brackets); 1451 1452 if (NumElts) { 1453 DependentSizedArrayType *CanonCheck 1454 = DependentSizedArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1455 assert(!CanonCheck && "Dependent-sized canonical array type broken"); 1456 (void)CanonCheck; 1457 DependentSizedArrayTypes.InsertNode(New, InsertPos); 1458 } 1459 } else { 1460 QualType Canon = getDependentSizedArrayType(CanonEltTy, NumElts, 1461 ASM, EltTypeQuals, 1462 SourceRange()); 1463 New = new (*this, TypeAlignment) 1464 DependentSizedArrayType(*this, EltTy, Canon, 1465 NumElts, ASM, EltTypeQuals, Brackets); 1466 } 1467 } 1468 1469 Types.push_back(New); 1470 return QualType(New, 0); 1471} 1472 1473QualType ASTContext::getIncompleteArrayType(QualType EltTy, 1474 ArrayType::ArraySizeModifier ASM, 1475 unsigned EltTypeQuals) { 1476 llvm::FoldingSetNodeID ID; 1477 IncompleteArrayType::Profile(ID, EltTy, ASM, EltTypeQuals); 1478 1479 void *InsertPos = 0; 1480 if (IncompleteArrayType *ATP = 1481 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1482 return QualType(ATP, 0); 1483 1484 // If the element type isn't canonical, this won't be a canonical type 1485 // either, so fill in the canonical type field. 1486 QualType Canonical; 1487 1488 if (!EltTy.isCanonical()) { 1489 Canonical = getIncompleteArrayType(getCanonicalType(EltTy), 1490 ASM, EltTypeQuals); 1491 1492 // Get the new insert position for the node we care about. 1493 IncompleteArrayType *NewIP = 1494 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1495 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1496 } 1497 1498 IncompleteArrayType *New = new (*this, TypeAlignment) 1499 IncompleteArrayType(EltTy, Canonical, ASM, EltTypeQuals); 1500 1501 IncompleteArrayTypes.InsertNode(New, InsertPos); 1502 Types.push_back(New); 1503 return QualType(New, 0); 1504} 1505 1506/// getVectorType - Return the unique reference to a vector type of 1507/// the specified element type and size. VectorType must be a built-in type. 1508QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts, 1509 bool IsAltiVec, bool IsPixel) { 1510 BuiltinType *baseType; 1511 1512 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1513 assert(baseType != 0 && "getVectorType(): Expecting a built-in type"); 1514 1515 // Check if we've already instantiated a vector of this type. 1516 llvm::FoldingSetNodeID ID; 1517 VectorType::Profile(ID, vecType, NumElts, Type::Vector, 1518 IsAltiVec, IsPixel); 1519 void *InsertPos = 0; 1520 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1521 return QualType(VTP, 0); 1522 1523 // If the element type isn't canonical, this won't be a canonical type either, 1524 // so fill in the canonical type field. 1525 QualType Canonical; 1526 if (!vecType.isCanonical() || IsAltiVec || IsPixel) { 1527 Canonical = getVectorType(getCanonicalType(vecType), 1528 NumElts, false, false); 1529 1530 // Get the new insert position for the node we care about. 1531 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1532 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1533 } 1534 VectorType *New = new (*this, TypeAlignment) 1535 VectorType(vecType, NumElts, Canonical, IsAltiVec, IsPixel); 1536 VectorTypes.InsertNode(New, InsertPos); 1537 Types.push_back(New); 1538 return QualType(New, 0); 1539} 1540 1541/// getExtVectorType - Return the unique reference to an extended vector type of 1542/// the specified element type and size. VectorType must be a built-in type. 1543QualType ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) { 1544 BuiltinType *baseType; 1545 1546 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1547 assert(baseType != 0 && "getExtVectorType(): Expecting a built-in type"); 1548 1549 // Check if we've already instantiated a vector of this type. 1550 llvm::FoldingSetNodeID ID; 1551 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector, false, false); 1552 void *InsertPos = 0; 1553 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1554 return QualType(VTP, 0); 1555 1556 // If the element type isn't canonical, this won't be a canonical type either, 1557 // so fill in the canonical type field. 1558 QualType Canonical; 1559 if (!vecType.isCanonical()) { 1560 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts); 1561 1562 // Get the new insert position for the node we care about. 1563 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1564 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1565 } 1566 ExtVectorType *New = new (*this, TypeAlignment) 1567 ExtVectorType(vecType, NumElts, Canonical); 1568 VectorTypes.InsertNode(New, InsertPos); 1569 Types.push_back(New); 1570 return QualType(New, 0); 1571} 1572 1573QualType ASTContext::getDependentSizedExtVectorType(QualType vecType, 1574 Expr *SizeExpr, 1575 SourceLocation AttrLoc) { 1576 llvm::FoldingSetNodeID ID; 1577 DependentSizedExtVectorType::Profile(ID, *this, getCanonicalType(vecType), 1578 SizeExpr); 1579 1580 void *InsertPos = 0; 1581 DependentSizedExtVectorType *Canon 1582 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1583 DependentSizedExtVectorType *New; 1584 if (Canon) { 1585 // We already have a canonical version of this array type; use it as 1586 // the canonical type for a newly-built type. 1587 New = new (*this, TypeAlignment) 1588 DependentSizedExtVectorType(*this, vecType, QualType(Canon, 0), 1589 SizeExpr, AttrLoc); 1590 } else { 1591 QualType CanonVecTy = getCanonicalType(vecType); 1592 if (CanonVecTy == vecType) { 1593 New = new (*this, TypeAlignment) 1594 DependentSizedExtVectorType(*this, vecType, QualType(), SizeExpr, 1595 AttrLoc); 1596 1597 DependentSizedExtVectorType *CanonCheck 1598 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1599 assert(!CanonCheck && "Dependent-sized ext_vector canonical type broken"); 1600 (void)CanonCheck; 1601 DependentSizedExtVectorTypes.InsertNode(New, InsertPos); 1602 } else { 1603 QualType Canon = getDependentSizedExtVectorType(CanonVecTy, SizeExpr, 1604 SourceLocation()); 1605 New = new (*this, TypeAlignment) 1606 DependentSizedExtVectorType(*this, vecType, Canon, SizeExpr, AttrLoc); 1607 } 1608 } 1609 1610 Types.push_back(New); 1611 return QualType(New, 0); 1612} 1613 1614/// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 1615/// 1616QualType ASTContext::getFunctionNoProtoType(QualType ResultTy, 1617 const FunctionType::ExtInfo &Info) { 1618 const CallingConv CallConv = Info.getCC(); 1619 // Unique functions, to guarantee there is only one function of a particular 1620 // structure. 1621 llvm::FoldingSetNodeID ID; 1622 FunctionNoProtoType::Profile(ID, ResultTy, Info); 1623 1624 void *InsertPos = 0; 1625 if (FunctionNoProtoType *FT = 1626 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1627 return QualType(FT, 0); 1628 1629 QualType Canonical; 1630 if (!ResultTy.isCanonical() || 1631 getCanonicalCallConv(CallConv) != CallConv) { 1632 Canonical = 1633 getFunctionNoProtoType(getCanonicalType(ResultTy), 1634 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1635 1636 // Get the new insert position for the node we care about. 1637 FunctionNoProtoType *NewIP = 1638 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1639 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1640 } 1641 1642 FunctionNoProtoType *New = new (*this, TypeAlignment) 1643 FunctionNoProtoType(ResultTy, Canonical, Info); 1644 Types.push_back(New); 1645 FunctionNoProtoTypes.InsertNode(New, InsertPos); 1646 return QualType(New, 0); 1647} 1648 1649/// getFunctionType - Return a normal function type with a typed argument 1650/// list. isVariadic indicates whether the argument list includes '...'. 1651QualType ASTContext::getFunctionType(QualType ResultTy,const QualType *ArgArray, 1652 unsigned NumArgs, bool isVariadic, 1653 unsigned TypeQuals, bool hasExceptionSpec, 1654 bool hasAnyExceptionSpec, unsigned NumExs, 1655 const QualType *ExArray, 1656 const FunctionType::ExtInfo &Info) { 1657 const CallingConv CallConv= Info.getCC(); 1658 // Unique functions, to guarantee there is only one function of a particular 1659 // structure. 1660 llvm::FoldingSetNodeID ID; 1661 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, isVariadic, 1662 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1663 NumExs, ExArray, Info); 1664 1665 void *InsertPos = 0; 1666 if (FunctionProtoType *FTP = 1667 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1668 return QualType(FTP, 0); 1669 1670 // Determine whether the type being created is already canonical or not. 1671 bool isCanonical = !hasExceptionSpec && ResultTy.isCanonical(); 1672 for (unsigned i = 0; i != NumArgs && isCanonical; ++i) 1673 if (!ArgArray[i].isCanonicalAsParam()) 1674 isCanonical = false; 1675 1676 // If this type isn't canonical, get the canonical version of it. 1677 // The exception spec is not part of the canonical type. 1678 QualType Canonical; 1679 if (!isCanonical || getCanonicalCallConv(CallConv) != CallConv) { 1680 llvm::SmallVector<QualType, 16> CanonicalArgs; 1681 CanonicalArgs.reserve(NumArgs); 1682 for (unsigned i = 0; i != NumArgs; ++i) 1683 CanonicalArgs.push_back(getCanonicalParamType(ArgArray[i])); 1684 1685 Canonical = getFunctionType(getCanonicalType(ResultTy), 1686 CanonicalArgs.data(), NumArgs, 1687 isVariadic, TypeQuals, false, 1688 false, 0, 0, 1689 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1690 1691 // Get the new insert position for the node we care about. 1692 FunctionProtoType *NewIP = 1693 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1694 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1695 } 1696 1697 // FunctionProtoType objects are allocated with extra bytes after them 1698 // for two variable size arrays (for parameter and exception types) at the 1699 // end of them. 1700 FunctionProtoType *FTP = 1701 (FunctionProtoType*)Allocate(sizeof(FunctionProtoType) + 1702 NumArgs*sizeof(QualType) + 1703 NumExs*sizeof(QualType), TypeAlignment); 1704 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, isVariadic, 1705 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1706 ExArray, NumExs, Canonical, Info); 1707 Types.push_back(FTP); 1708 FunctionProtoTypes.InsertNode(FTP, InsertPos); 1709 return QualType(FTP, 0); 1710} 1711 1712#ifndef NDEBUG 1713static bool NeedsInjectedClassNameType(const RecordDecl *D) { 1714 if (!isa<CXXRecordDecl>(D)) return false; 1715 const CXXRecordDecl *RD = cast<CXXRecordDecl>(D); 1716 if (isa<ClassTemplatePartialSpecializationDecl>(RD)) 1717 return true; 1718 if (RD->getDescribedClassTemplate() && 1719 !isa<ClassTemplateSpecializationDecl>(RD)) 1720 return true; 1721 return false; 1722} 1723#endif 1724 1725/// getInjectedClassNameType - Return the unique reference to the 1726/// injected class name type for the specified templated declaration. 1727QualType ASTContext::getInjectedClassNameType(CXXRecordDecl *Decl, 1728 QualType TST) { 1729 assert(NeedsInjectedClassNameType(Decl)); 1730 if (Decl->TypeForDecl) { 1731 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1732 } else if (CXXRecordDecl *PrevDecl 1733 = cast_or_null<CXXRecordDecl>(Decl->getPreviousDeclaration())) { 1734 assert(PrevDecl->TypeForDecl && "previous declaration has no type"); 1735 Decl->TypeForDecl = PrevDecl->TypeForDecl; 1736 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1737 } else { 1738 Decl->TypeForDecl = new (*this, TypeAlignment) 1739 InjectedClassNameType(Decl, TST, TST->getCanonicalTypeInternal()); 1740 Types.push_back(Decl->TypeForDecl); 1741 } 1742 return QualType(Decl->TypeForDecl, 0); 1743} 1744 1745/// getTypeDeclType - Return the unique reference to the type for the 1746/// specified type declaration. 1747QualType ASTContext::getTypeDeclTypeSlow(const TypeDecl *Decl) { 1748 assert(Decl && "Passed null for Decl param"); 1749 assert(!Decl->TypeForDecl && "TypeForDecl present in slow case"); 1750 1751 if (const TypedefDecl *Typedef = dyn_cast<TypedefDecl>(Decl)) 1752 return getTypedefType(Typedef); 1753 1754 if (const ObjCInterfaceDecl *ObjCInterface 1755 = dyn_cast<ObjCInterfaceDecl>(Decl)) 1756 return getObjCInterfaceType(ObjCInterface); 1757 1758 assert(!isa<TemplateTypeParmDecl>(Decl) && 1759 "Template type parameter types are always available."); 1760 1761 if (const RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) { 1762 assert(!Record->getPreviousDeclaration() && 1763 "struct/union has previous declaration"); 1764 assert(!NeedsInjectedClassNameType(Record)); 1765 Decl->TypeForDecl = new (*this, TypeAlignment) RecordType(Record); 1766 } else if (const EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) { 1767 assert(!Enum->getPreviousDeclaration() && 1768 "enum has previous declaration"); 1769 Decl->TypeForDecl = new (*this, TypeAlignment) EnumType(Enum); 1770 } else if (const UnresolvedUsingTypenameDecl *Using = 1771 dyn_cast<UnresolvedUsingTypenameDecl>(Decl)) { 1772 Decl->TypeForDecl = new (*this, TypeAlignment) UnresolvedUsingType(Using); 1773 } else 1774 llvm_unreachable("TypeDecl without a type?"); 1775 1776 Types.push_back(Decl->TypeForDecl); 1777 return QualType(Decl->TypeForDecl, 0); 1778} 1779 1780/// getTypedefType - Return the unique reference to the type for the 1781/// specified typename decl. 1782QualType ASTContext::getTypedefType(const TypedefDecl *Decl) { 1783 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1784 1785 QualType Canonical = getCanonicalType(Decl->getUnderlyingType()); 1786 Decl->TypeForDecl = new(*this, TypeAlignment) 1787 TypedefType(Type::Typedef, Decl, Canonical); 1788 Types.push_back(Decl->TypeForDecl); 1789 return QualType(Decl->TypeForDecl, 0); 1790} 1791 1792/// \brief Retrieve a substitution-result type. 1793QualType 1794ASTContext::getSubstTemplateTypeParmType(const TemplateTypeParmType *Parm, 1795 QualType Replacement) { 1796 assert(Replacement.isCanonical() 1797 && "replacement types must always be canonical"); 1798 1799 llvm::FoldingSetNodeID ID; 1800 SubstTemplateTypeParmType::Profile(ID, Parm, Replacement); 1801 void *InsertPos = 0; 1802 SubstTemplateTypeParmType *SubstParm 1803 = SubstTemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1804 1805 if (!SubstParm) { 1806 SubstParm = new (*this, TypeAlignment) 1807 SubstTemplateTypeParmType(Parm, Replacement); 1808 Types.push_back(SubstParm); 1809 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 1810 } 1811 1812 return QualType(SubstParm, 0); 1813} 1814 1815/// \brief Retrieve the template type parameter type for a template 1816/// parameter or parameter pack with the given depth, index, and (optionally) 1817/// name. 1818QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index, 1819 bool ParameterPack, 1820 IdentifierInfo *Name) { 1821 llvm::FoldingSetNodeID ID; 1822 TemplateTypeParmType::Profile(ID, Depth, Index, ParameterPack, Name); 1823 void *InsertPos = 0; 1824 TemplateTypeParmType *TypeParm 1825 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1826 1827 if (TypeParm) 1828 return QualType(TypeParm, 0); 1829 1830 if (Name) { 1831 QualType Canon = getTemplateTypeParmType(Depth, Index, ParameterPack); 1832 TypeParm = new (*this, TypeAlignment) 1833 TemplateTypeParmType(Depth, Index, ParameterPack, Name, Canon); 1834 1835 TemplateTypeParmType *TypeCheck 1836 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1837 assert(!TypeCheck && "Template type parameter canonical type broken"); 1838 (void)TypeCheck; 1839 } else 1840 TypeParm = new (*this, TypeAlignment) 1841 TemplateTypeParmType(Depth, Index, ParameterPack); 1842 1843 Types.push_back(TypeParm); 1844 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos); 1845 1846 return QualType(TypeParm, 0); 1847} 1848 1849TypeSourceInfo * 1850ASTContext::getTemplateSpecializationTypeInfo(TemplateName Name, 1851 SourceLocation NameLoc, 1852 const TemplateArgumentListInfo &Args, 1853 QualType CanonType) { 1854 QualType TST = getTemplateSpecializationType(Name, Args, CanonType); 1855 1856 TypeSourceInfo *DI = CreateTypeSourceInfo(TST); 1857 TemplateSpecializationTypeLoc TL 1858 = cast<TemplateSpecializationTypeLoc>(DI->getTypeLoc()); 1859 TL.setTemplateNameLoc(NameLoc); 1860 TL.setLAngleLoc(Args.getLAngleLoc()); 1861 TL.setRAngleLoc(Args.getRAngleLoc()); 1862 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 1863 TL.setArgLocInfo(i, Args[i].getLocInfo()); 1864 return DI; 1865} 1866 1867QualType 1868ASTContext::getTemplateSpecializationType(TemplateName Template, 1869 const TemplateArgumentListInfo &Args, 1870 QualType Canon) { 1871 unsigned NumArgs = Args.size(); 1872 1873 llvm::SmallVector<TemplateArgument, 4> ArgVec; 1874 ArgVec.reserve(NumArgs); 1875 for (unsigned i = 0; i != NumArgs; ++i) 1876 ArgVec.push_back(Args[i].getArgument()); 1877 1878 return getTemplateSpecializationType(Template, ArgVec.data(), NumArgs, Canon); 1879} 1880 1881QualType 1882ASTContext::getTemplateSpecializationType(TemplateName Template, 1883 const TemplateArgument *Args, 1884 unsigned NumArgs, 1885 QualType Canon) { 1886 if (!Canon.isNull()) 1887 Canon = getCanonicalType(Canon); 1888 else { 1889 // Build the canonical template specialization type. 1890 TemplateName CanonTemplate = getCanonicalTemplateName(Template); 1891 llvm::SmallVector<TemplateArgument, 4> CanonArgs; 1892 CanonArgs.reserve(NumArgs); 1893 for (unsigned I = 0; I != NumArgs; ++I) 1894 CanonArgs.push_back(getCanonicalTemplateArgument(Args[I])); 1895 1896 // Determine whether this canonical template specialization type already 1897 // exists. 1898 llvm::FoldingSetNodeID ID; 1899 TemplateSpecializationType::Profile(ID, CanonTemplate, 1900 CanonArgs.data(), NumArgs, *this); 1901 1902 void *InsertPos = 0; 1903 TemplateSpecializationType *Spec 1904 = TemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 1905 1906 if (!Spec) { 1907 // Allocate a new canonical template specialization type. 1908 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 1909 sizeof(TemplateArgument) * NumArgs), 1910 TypeAlignment); 1911 Spec = new (Mem) TemplateSpecializationType(*this, CanonTemplate, 1912 CanonArgs.data(), NumArgs, 1913 Canon); 1914 Types.push_back(Spec); 1915 TemplateSpecializationTypes.InsertNode(Spec, InsertPos); 1916 } 1917 1918 if (Canon.isNull()) 1919 Canon = QualType(Spec, 0); 1920 assert(Canon->isDependentType() && 1921 "Non-dependent template-id type must have a canonical type"); 1922 } 1923 1924 // Allocate the (non-canonical) template specialization type, but don't 1925 // try to unique it: these types typically have location information that 1926 // we don't unique and don't want to lose. 1927 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 1928 sizeof(TemplateArgument) * NumArgs), 1929 TypeAlignment); 1930 TemplateSpecializationType *Spec 1931 = new (Mem) TemplateSpecializationType(*this, Template, Args, NumArgs, 1932 Canon); 1933 1934 Types.push_back(Spec); 1935 return QualType(Spec, 0); 1936} 1937 1938QualType 1939ASTContext::getQualifiedNameType(NestedNameSpecifier *NNS, 1940 QualType NamedType) { 1941 llvm::FoldingSetNodeID ID; 1942 QualifiedNameType::Profile(ID, NNS, NamedType); 1943 1944 void *InsertPos = 0; 1945 QualifiedNameType *T 1946 = QualifiedNameTypes.FindNodeOrInsertPos(ID, InsertPos); 1947 if (T) 1948 return QualType(T, 0); 1949 1950 QualType Canon = NamedType; 1951 if (!Canon.isCanonical()) { 1952 Canon = getCanonicalType(NamedType); 1953 QualifiedNameType *CheckT 1954 = QualifiedNameTypes.FindNodeOrInsertPos(ID, InsertPos); 1955 assert(!CheckT && "Qualified name canonical type broken"); 1956 (void)CheckT; 1957 } 1958 1959 T = new (*this) QualifiedNameType(NNS, NamedType, Canon); 1960 Types.push_back(T); 1961 QualifiedNameTypes.InsertNode(T, InsertPos); 1962 return QualType(T, 0); 1963} 1964 1965QualType ASTContext::getDependentNameType(ElaboratedTypeKeyword Keyword, 1966 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 ElaboratedTypeKeyword CanonKeyword = Keyword; 1974 if (Keyword == ETK_None) 1975 CanonKeyword = ETK_Typename; 1976 1977 if (CanonNNS != NNS || CanonKeyword != Keyword) 1978 Canon = getDependentNameType(CanonKeyword, CanonNNS, Name); 1979 } 1980 1981 llvm::FoldingSetNodeID ID; 1982 DependentNameType::Profile(ID, Keyword, NNS, Name); 1983 1984 void *InsertPos = 0; 1985 DependentNameType *T 1986 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 1987 if (T) 1988 return QualType(T, 0); 1989 1990 T = new (*this) DependentNameType(Keyword, NNS, Name, Canon); 1991 Types.push_back(T); 1992 DependentNameTypes.InsertNode(T, InsertPos); 1993 return QualType(T, 0); 1994} 1995 1996QualType 1997ASTContext::getDependentNameType(ElaboratedTypeKeyword Keyword, 1998 NestedNameSpecifier *NNS, 1999 const TemplateSpecializationType *TemplateId, 2000 QualType Canon) { 2001 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 2002 2003 llvm::FoldingSetNodeID ID; 2004 DependentNameType::Profile(ID, Keyword, NNS, TemplateId); 2005 2006 void *InsertPos = 0; 2007 DependentNameType *T 2008 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 2009 if (T) 2010 return QualType(T, 0); 2011 2012 if (Canon.isNull()) { 2013 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2014 QualType CanonType = getCanonicalType(QualType(TemplateId, 0)); 2015 ElaboratedTypeKeyword CanonKeyword = Keyword; 2016 if (Keyword == ETK_None) 2017 CanonKeyword = ETK_Typename; 2018 if (CanonNNS != NNS || CanonKeyword != Keyword || 2019 CanonType != QualType(TemplateId, 0)) { 2020 const TemplateSpecializationType *CanonTemplateId 2021 = CanonType->getAs<TemplateSpecializationType>(); 2022 assert(CanonTemplateId && 2023 "Canonical type must also be a template specialization type"); 2024 Canon = getDependentNameType(CanonKeyword, CanonNNS, CanonTemplateId); 2025 } 2026 2027 DependentNameType *CheckT 2028 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 2029 assert(!CheckT && "Typename canonical type is broken"); (void)CheckT; 2030 } 2031 2032 T = new (*this) DependentNameType(Keyword, NNS, TemplateId, Canon); 2033 Types.push_back(T); 2034 DependentNameTypes.InsertNode(T, InsertPos); 2035 return QualType(T, 0); 2036} 2037 2038QualType 2039ASTContext::getElaboratedType(QualType UnderlyingType, 2040 ElaboratedType::TagKind Tag) { 2041 llvm::FoldingSetNodeID ID; 2042 ElaboratedType::Profile(ID, UnderlyingType, Tag); 2043 2044 void *InsertPos = 0; 2045 ElaboratedType *T = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2046 if (T) 2047 return QualType(T, 0); 2048 2049 QualType Canon = UnderlyingType; 2050 if (!Canon.isCanonical()) { 2051 Canon = getCanonicalType(Canon); 2052 ElaboratedType *CheckT = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2053 assert(!CheckT && "Elaborated canonical type is broken"); (void)CheckT; 2054 } 2055 2056 T = new (*this) ElaboratedType(UnderlyingType, Tag, Canon); 2057 Types.push_back(T); 2058 ElaboratedTypes.InsertNode(T, InsertPos); 2059 return QualType(T, 0); 2060} 2061 2062/// CmpProtocolNames - Comparison predicate for sorting protocols 2063/// alphabetically. 2064static bool CmpProtocolNames(const ObjCProtocolDecl *LHS, 2065 const ObjCProtocolDecl *RHS) { 2066 return LHS->getDeclName() < RHS->getDeclName(); 2067} 2068 2069static bool areSortedAndUniqued(ObjCProtocolDecl **Protocols, 2070 unsigned NumProtocols) { 2071 if (NumProtocols == 0) return true; 2072 2073 for (unsigned i = 1; i != NumProtocols; ++i) 2074 if (!CmpProtocolNames(Protocols[i-1], Protocols[i])) 2075 return false; 2076 return true; 2077} 2078 2079static void SortAndUniqueProtocols(ObjCProtocolDecl **Protocols, 2080 unsigned &NumProtocols) { 2081 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols; 2082 2083 // Sort protocols, keyed by name. 2084 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames); 2085 2086 // Remove duplicates. 2087 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd); 2088 NumProtocols = ProtocolsEnd-Protocols; 2089} 2090 2091/// getObjCObjectPointerType - Return a ObjCObjectPointerType type for 2092/// the given interface decl and the conforming protocol list. 2093QualType ASTContext::getObjCObjectPointerType(QualType InterfaceT, 2094 ObjCProtocolDecl **Protocols, 2095 unsigned NumProtocols, 2096 unsigned Quals) { 2097 llvm::FoldingSetNodeID ID; 2098 ObjCObjectPointerType::Profile(ID, InterfaceT, Protocols, NumProtocols); 2099 Qualifiers Qs = Qualifiers::fromCVRMask(Quals); 2100 2101 void *InsertPos = 0; 2102 if (ObjCObjectPointerType *QT = 2103 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 2104 return getQualifiedType(QualType(QT, 0), Qs); 2105 2106 // Sort the protocol list alphabetically to canonicalize it. 2107 QualType Canonical; 2108 if (!InterfaceT.isCanonical() || 2109 !areSortedAndUniqued(Protocols, NumProtocols)) { 2110 if (!areSortedAndUniqued(Protocols, NumProtocols)) { 2111 llvm::SmallVector<ObjCProtocolDecl*, 8> Sorted(NumProtocols); 2112 unsigned UniqueCount = NumProtocols; 2113 2114 std::copy(Protocols, Protocols + NumProtocols, Sorted.begin()); 2115 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2116 2117 Canonical = getObjCObjectPointerType(getCanonicalType(InterfaceT), 2118 &Sorted[0], UniqueCount); 2119 } else { 2120 Canonical = getObjCObjectPointerType(getCanonicalType(InterfaceT), 2121 Protocols, NumProtocols); 2122 } 2123 2124 // Regenerate InsertPos. 2125 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 2126 } 2127 2128 // No match. 2129 unsigned Size = sizeof(ObjCObjectPointerType) 2130 + NumProtocols * sizeof(ObjCProtocolDecl *); 2131 void *Mem = Allocate(Size, TypeAlignment); 2132 ObjCObjectPointerType *QType = new (Mem) ObjCObjectPointerType(Canonical, 2133 InterfaceT, 2134 Protocols, 2135 NumProtocols); 2136 2137 Types.push_back(QType); 2138 ObjCObjectPointerTypes.InsertNode(QType, InsertPos); 2139 return getQualifiedType(QualType(QType, 0), Qs); 2140} 2141 2142/// getObjCInterfaceType - Return the unique reference to the type for the 2143/// specified ObjC interface decl. The list of protocols is optional. 2144QualType ASTContext::getObjCInterfaceType(const ObjCInterfaceDecl *Decl, 2145 ObjCProtocolDecl **Protocols, unsigned NumProtocols) { 2146 llvm::FoldingSetNodeID ID; 2147 ObjCInterfaceType::Profile(ID, Decl, Protocols, NumProtocols); 2148 2149 void *InsertPos = 0; 2150 if (ObjCInterfaceType *QT = 2151 ObjCInterfaceTypes.FindNodeOrInsertPos(ID, InsertPos)) 2152 return QualType(QT, 0); 2153 2154 // Sort the protocol list alphabetically to canonicalize it. 2155 QualType Canonical; 2156 if (NumProtocols && !areSortedAndUniqued(Protocols, NumProtocols)) { 2157 llvm::SmallVector<ObjCProtocolDecl*, 8> Sorted(NumProtocols); 2158 std::copy(Protocols, Protocols + NumProtocols, Sorted.begin()); 2159 2160 unsigned UniqueCount = NumProtocols; 2161 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2162 2163 Canonical = getObjCInterfaceType(Decl, &Sorted[0], UniqueCount); 2164 2165 ObjCInterfaceTypes.FindNodeOrInsertPos(ID, InsertPos); 2166 } 2167 2168 unsigned Size = sizeof(ObjCInterfaceType) 2169 + NumProtocols * sizeof(ObjCProtocolDecl *); 2170 void *Mem = Allocate(Size, TypeAlignment); 2171 ObjCInterfaceType *QType = new (Mem) ObjCInterfaceType(Canonical, 2172 const_cast<ObjCInterfaceDecl*>(Decl), 2173 Protocols, 2174 NumProtocols); 2175 2176 Types.push_back(QType); 2177 ObjCInterfaceTypes.InsertNode(QType, InsertPos); 2178 return QualType(QType, 0); 2179} 2180 2181/// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique 2182/// TypeOfExprType AST's (since expression's are never shared). For example, 2183/// multiple declarations that refer to "typeof(x)" all contain different 2184/// DeclRefExpr's. This doesn't effect the type checker, since it operates 2185/// on canonical type's (which are always unique). 2186QualType ASTContext::getTypeOfExprType(Expr *tofExpr) { 2187 TypeOfExprType *toe; 2188 if (tofExpr->isTypeDependent()) { 2189 llvm::FoldingSetNodeID ID; 2190 DependentTypeOfExprType::Profile(ID, *this, tofExpr); 2191 2192 void *InsertPos = 0; 2193 DependentTypeOfExprType *Canon 2194 = DependentTypeOfExprTypes.FindNodeOrInsertPos(ID, InsertPos); 2195 if (Canon) { 2196 // We already have a "canonical" version of an identical, dependent 2197 // typeof(expr) type. Use that as our canonical type. 2198 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, 2199 QualType((TypeOfExprType*)Canon, 0)); 2200 } 2201 else { 2202 // Build a new, canonical typeof(expr) type. 2203 Canon 2204 = new (*this, TypeAlignment) DependentTypeOfExprType(*this, tofExpr); 2205 DependentTypeOfExprTypes.InsertNode(Canon, InsertPos); 2206 toe = Canon; 2207 } 2208 } else { 2209 QualType Canonical = getCanonicalType(tofExpr->getType()); 2210 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, Canonical); 2211 } 2212 Types.push_back(toe); 2213 return QualType(toe, 0); 2214} 2215 2216/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique 2217/// TypeOfType AST's. The only motivation to unique these nodes would be 2218/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be 2219/// an issue. This doesn't effect the type checker, since it operates 2220/// on canonical type's (which are always unique). 2221QualType ASTContext::getTypeOfType(QualType tofType) { 2222 QualType Canonical = getCanonicalType(tofType); 2223 TypeOfType *tot = new (*this, TypeAlignment) TypeOfType(tofType, Canonical); 2224 Types.push_back(tot); 2225 return QualType(tot, 0); 2226} 2227 2228/// getDecltypeForExpr - Given an expr, will return the decltype for that 2229/// expression, according to the rules in C++0x [dcl.type.simple]p4 2230static QualType getDecltypeForExpr(const Expr *e, ASTContext &Context) { 2231 if (e->isTypeDependent()) 2232 return Context.DependentTy; 2233 2234 // If e is an id expression or a class member access, decltype(e) is defined 2235 // as the type of the entity named by e. 2236 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(e)) { 2237 if (const ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl())) 2238 return VD->getType(); 2239 } 2240 if (const MemberExpr *ME = dyn_cast<MemberExpr>(e)) { 2241 if (const FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) 2242 return FD->getType(); 2243 } 2244 // If e is a function call or an invocation of an overloaded operator, 2245 // (parentheses around e are ignored), decltype(e) is defined as the 2246 // return type of that function. 2247 if (const CallExpr *CE = dyn_cast<CallExpr>(e->IgnoreParens())) 2248 return CE->getCallReturnType(); 2249 2250 QualType T = e->getType(); 2251 2252 // Otherwise, where T is the type of e, if e is an lvalue, decltype(e) is 2253 // defined as T&, otherwise decltype(e) is defined as T. 2254 if (e->isLvalue(Context) == Expr::LV_Valid) 2255 T = Context.getLValueReferenceType(T); 2256 2257 return T; 2258} 2259 2260/// getDecltypeType - Unlike many "get<Type>" functions, we don't unique 2261/// DecltypeType AST's. The only motivation to unique these nodes would be 2262/// memory savings. Since decltype(t) is fairly uncommon, space shouldn't be 2263/// an issue. This doesn't effect the type checker, since it operates 2264/// on canonical type's (which are always unique). 2265QualType ASTContext::getDecltypeType(Expr *e) { 2266 DecltypeType *dt; 2267 if (e->isTypeDependent()) { 2268 llvm::FoldingSetNodeID ID; 2269 DependentDecltypeType::Profile(ID, *this, e); 2270 2271 void *InsertPos = 0; 2272 DependentDecltypeType *Canon 2273 = DependentDecltypeTypes.FindNodeOrInsertPos(ID, InsertPos); 2274 if (Canon) { 2275 // We already have a "canonical" version of an equivalent, dependent 2276 // decltype type. Use that as our canonical type. 2277 dt = new (*this, TypeAlignment) DecltypeType(e, DependentTy, 2278 QualType((DecltypeType*)Canon, 0)); 2279 } 2280 else { 2281 // Build a new, canonical typeof(expr) type. 2282 Canon = new (*this, TypeAlignment) DependentDecltypeType(*this, e); 2283 DependentDecltypeTypes.InsertNode(Canon, InsertPos); 2284 dt = Canon; 2285 } 2286 } else { 2287 QualType T = getDecltypeForExpr(e, *this); 2288 dt = new (*this, TypeAlignment) DecltypeType(e, T, getCanonicalType(T)); 2289 } 2290 Types.push_back(dt); 2291 return QualType(dt, 0); 2292} 2293 2294/// getTagDeclType - Return the unique reference to the type for the 2295/// specified TagDecl (struct/union/class/enum) decl. 2296QualType ASTContext::getTagDeclType(const TagDecl *Decl) { 2297 assert (Decl); 2298 // FIXME: What is the design on getTagDeclType when it requires casting 2299 // away const? mutable? 2300 return getTypeDeclType(const_cast<TagDecl*>(Decl)); 2301} 2302 2303/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result 2304/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and 2305/// needs to agree with the definition in <stddef.h>. 2306CanQualType ASTContext::getSizeType() const { 2307 return getFromTargetType(Target.getSizeType()); 2308} 2309 2310/// getSignedWCharType - Return the type of "signed wchar_t". 2311/// Used when in C++, as a GCC extension. 2312QualType ASTContext::getSignedWCharType() const { 2313 // FIXME: derive from "Target" ? 2314 return WCharTy; 2315} 2316 2317/// getUnsignedWCharType - Return the type of "unsigned wchar_t". 2318/// Used when in C++, as a GCC extension. 2319QualType ASTContext::getUnsignedWCharType() const { 2320 // FIXME: derive from "Target" ? 2321 return UnsignedIntTy; 2322} 2323 2324/// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 2325/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 2326QualType ASTContext::getPointerDiffType() const { 2327 return getFromTargetType(Target.getPtrDiffType(0)); 2328} 2329 2330//===----------------------------------------------------------------------===// 2331// Type Operators 2332//===----------------------------------------------------------------------===// 2333 2334CanQualType ASTContext::getCanonicalParamType(QualType T) { 2335 // Push qualifiers into arrays, and then discard any remaining 2336 // qualifiers. 2337 T = getCanonicalType(T); 2338 const Type *Ty = T.getTypePtr(); 2339 2340 QualType Result; 2341 if (isa<ArrayType>(Ty)) { 2342 Result = getArrayDecayedType(QualType(Ty,0)); 2343 } else if (isa<FunctionType>(Ty)) { 2344 Result = getPointerType(QualType(Ty, 0)); 2345 } else { 2346 Result = QualType(Ty, 0); 2347 } 2348 2349 return CanQualType::CreateUnsafe(Result); 2350} 2351 2352/// getCanonicalType - Return the canonical (structural) type corresponding to 2353/// the specified potentially non-canonical type. The non-canonical version 2354/// of a type may have many "decorated" versions of types. Decorators can 2355/// include typedefs, 'typeof' operators, etc. The returned type is guaranteed 2356/// to be free of any of these, allowing two canonical types to be compared 2357/// for exact equality with a simple pointer comparison. 2358CanQualType ASTContext::getCanonicalType(QualType T) { 2359 QualifierCollector Quals; 2360 const Type *Ptr = Quals.strip(T); 2361 QualType CanType = Ptr->getCanonicalTypeInternal(); 2362 2363 // The canonical internal type will be the canonical type *except* 2364 // that we push type qualifiers down through array types. 2365 2366 // If there are no new qualifiers to push down, stop here. 2367 if (!Quals.hasQualifiers()) 2368 return CanQualType::CreateUnsafe(CanType); 2369 2370 // If the type qualifiers are on an array type, get the canonical 2371 // type of the array with the qualifiers applied to the element 2372 // type. 2373 ArrayType *AT = dyn_cast<ArrayType>(CanType); 2374 if (!AT) 2375 return CanQualType::CreateUnsafe(getQualifiedType(CanType, Quals)); 2376 2377 // Get the canonical version of the element with the extra qualifiers on it. 2378 // This can recursively sink qualifiers through multiple levels of arrays. 2379 QualType NewEltTy = getQualifiedType(AT->getElementType(), Quals); 2380 NewEltTy = getCanonicalType(NewEltTy); 2381 2382 if (ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 2383 return CanQualType::CreateUnsafe( 2384 getConstantArrayType(NewEltTy, CAT->getSize(), 2385 CAT->getSizeModifier(), 2386 CAT->getIndexTypeCVRQualifiers())); 2387 if (IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) 2388 return CanQualType::CreateUnsafe( 2389 getIncompleteArrayType(NewEltTy, IAT->getSizeModifier(), 2390 IAT->getIndexTypeCVRQualifiers())); 2391 2392 if (DependentSizedArrayType *DSAT = dyn_cast<DependentSizedArrayType>(AT)) 2393 return CanQualType::CreateUnsafe( 2394 getDependentSizedArrayType(NewEltTy, 2395 DSAT->getSizeExpr() ? 2396 DSAT->getSizeExpr()->Retain() : 0, 2397 DSAT->getSizeModifier(), 2398 DSAT->getIndexTypeCVRQualifiers(), 2399 DSAT->getBracketsRange())->getCanonicalTypeInternal()); 2400 2401 VariableArrayType *VAT = cast<VariableArrayType>(AT); 2402 return CanQualType::CreateUnsafe(getVariableArrayType(NewEltTy, 2403 VAT->getSizeExpr() ? 2404 VAT->getSizeExpr()->Retain() : 0, 2405 VAT->getSizeModifier(), 2406 VAT->getIndexTypeCVRQualifiers(), 2407 VAT->getBracketsRange())); 2408} 2409 2410QualType ASTContext::getUnqualifiedArrayType(QualType T, 2411 Qualifiers &Quals) { 2412 Quals = T.getQualifiers(); 2413 if (!isa<ArrayType>(T)) { 2414 return T.getUnqualifiedType(); 2415 } 2416 2417 const ArrayType *AT = cast<ArrayType>(T); 2418 QualType Elt = AT->getElementType(); 2419 QualType UnqualElt = getUnqualifiedArrayType(Elt, Quals); 2420 if (Elt == UnqualElt) 2421 return T; 2422 2423 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(T)) { 2424 return getConstantArrayType(UnqualElt, CAT->getSize(), 2425 CAT->getSizeModifier(), 0); 2426 } 2427 2428 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(T)) { 2429 return getIncompleteArrayType(UnqualElt, IAT->getSizeModifier(), 0); 2430 } 2431 2432 const DependentSizedArrayType *DSAT = cast<DependentSizedArrayType>(T); 2433 return getDependentSizedArrayType(UnqualElt, DSAT->getSizeExpr()->Retain(), 2434 DSAT->getSizeModifier(), 0, 2435 SourceRange()); 2436} 2437 2438DeclarationName ASTContext::getNameForTemplate(TemplateName Name) { 2439 if (TemplateDecl *TD = Name.getAsTemplateDecl()) 2440 return TD->getDeclName(); 2441 2442 if (DependentTemplateName *DTN = Name.getAsDependentTemplateName()) { 2443 if (DTN->isIdentifier()) { 2444 return DeclarationNames.getIdentifier(DTN->getIdentifier()); 2445 } else { 2446 return DeclarationNames.getCXXOperatorName(DTN->getOperator()); 2447 } 2448 } 2449 2450 OverloadedTemplateStorage *Storage = Name.getAsOverloadedTemplate(); 2451 assert(Storage); 2452 return (*Storage->begin())->getDeclName(); 2453} 2454 2455TemplateName ASTContext::getCanonicalTemplateName(TemplateName Name) { 2456 // If this template name refers to a template, the canonical 2457 // template name merely stores the template itself. 2458 if (TemplateDecl *Template = Name.getAsTemplateDecl()) 2459 return TemplateName(cast<TemplateDecl>(Template->getCanonicalDecl())); 2460 2461 assert(!Name.getAsOverloadedTemplate()); 2462 2463 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 2464 assert(DTN && "Non-dependent template names must refer to template decls."); 2465 return DTN->CanonicalTemplateName; 2466} 2467 2468bool ASTContext::hasSameTemplateName(TemplateName X, TemplateName Y) { 2469 X = getCanonicalTemplateName(X); 2470 Y = getCanonicalTemplateName(Y); 2471 return X.getAsVoidPointer() == Y.getAsVoidPointer(); 2472} 2473 2474TemplateArgument 2475ASTContext::getCanonicalTemplateArgument(const TemplateArgument &Arg) { 2476 switch (Arg.getKind()) { 2477 case TemplateArgument::Null: 2478 return Arg; 2479 2480 case TemplateArgument::Expression: 2481 return Arg; 2482 2483 case TemplateArgument::Declaration: 2484 return TemplateArgument(Arg.getAsDecl()->getCanonicalDecl()); 2485 2486 case TemplateArgument::Template: 2487 return TemplateArgument(getCanonicalTemplateName(Arg.getAsTemplate())); 2488 2489 case TemplateArgument::Integral: 2490 return TemplateArgument(*Arg.getAsIntegral(), 2491 getCanonicalType(Arg.getIntegralType())); 2492 2493 case TemplateArgument::Type: 2494 return TemplateArgument(getCanonicalType(Arg.getAsType())); 2495 2496 case TemplateArgument::Pack: { 2497 // FIXME: Allocate in ASTContext 2498 TemplateArgument *CanonArgs = new TemplateArgument[Arg.pack_size()]; 2499 unsigned Idx = 0; 2500 for (TemplateArgument::pack_iterator A = Arg.pack_begin(), 2501 AEnd = Arg.pack_end(); 2502 A != AEnd; (void)++A, ++Idx) 2503 CanonArgs[Idx] = getCanonicalTemplateArgument(*A); 2504 2505 TemplateArgument Result; 2506 Result.setArgumentPack(CanonArgs, Arg.pack_size(), false); 2507 return Result; 2508 } 2509 } 2510 2511 // Silence GCC warning 2512 assert(false && "Unhandled template argument kind"); 2513 return TemplateArgument(); 2514} 2515 2516NestedNameSpecifier * 2517ASTContext::getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) { 2518 if (!NNS) 2519 return 0; 2520 2521 switch (NNS->getKind()) { 2522 case NestedNameSpecifier::Identifier: 2523 // Canonicalize the prefix but keep the identifier the same. 2524 return NestedNameSpecifier::Create(*this, 2525 getCanonicalNestedNameSpecifier(NNS->getPrefix()), 2526 NNS->getAsIdentifier()); 2527 2528 case NestedNameSpecifier::Namespace: 2529 // A namespace is canonical; build a nested-name-specifier with 2530 // this namespace and no prefix. 2531 return NestedNameSpecifier::Create(*this, 0, NNS->getAsNamespace()); 2532 2533 case NestedNameSpecifier::TypeSpec: 2534 case NestedNameSpecifier::TypeSpecWithTemplate: { 2535 QualType T = getCanonicalType(QualType(NNS->getAsType(), 0)); 2536 return NestedNameSpecifier::Create(*this, 0, 2537 NNS->getKind() == NestedNameSpecifier::TypeSpecWithTemplate, 2538 T.getTypePtr()); 2539 } 2540 2541 case NestedNameSpecifier::Global: 2542 // The global specifier is canonical and unique. 2543 return NNS; 2544 } 2545 2546 // Required to silence a GCC warning 2547 return 0; 2548} 2549 2550 2551const ArrayType *ASTContext::getAsArrayType(QualType T) { 2552 // Handle the non-qualified case efficiently. 2553 if (!T.hasLocalQualifiers()) { 2554 // Handle the common positive case fast. 2555 if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 2556 return AT; 2557 } 2558 2559 // Handle the common negative case fast. 2560 QualType CType = T->getCanonicalTypeInternal(); 2561 if (!isa<ArrayType>(CType)) 2562 return 0; 2563 2564 // Apply any qualifiers from the array type to the element type. This 2565 // implements C99 6.7.3p8: "If the specification of an array type includes 2566 // any type qualifiers, the element type is so qualified, not the array type." 2567 2568 // If we get here, we either have type qualifiers on the type, or we have 2569 // sugar such as a typedef in the way. If we have type qualifiers on the type 2570 // we must propagate them down into the element type. 2571 2572 QualifierCollector Qs; 2573 const Type *Ty = Qs.strip(T.getDesugaredType()); 2574 2575 // If we have a simple case, just return now. 2576 const ArrayType *ATy = dyn_cast<ArrayType>(Ty); 2577 if (ATy == 0 || Qs.empty()) 2578 return ATy; 2579 2580 // Otherwise, we have an array and we have qualifiers on it. Push the 2581 // qualifiers into the array element type and return a new array type. 2582 // Get the canonical version of the element with the extra qualifiers on it. 2583 // This can recursively sink qualifiers through multiple levels of arrays. 2584 QualType NewEltTy = getQualifiedType(ATy->getElementType(), Qs); 2585 2586 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy)) 2587 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(), 2588 CAT->getSizeModifier(), 2589 CAT->getIndexTypeCVRQualifiers())); 2590 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy)) 2591 return cast<ArrayType>(getIncompleteArrayType(NewEltTy, 2592 IAT->getSizeModifier(), 2593 IAT->getIndexTypeCVRQualifiers())); 2594 2595 if (const DependentSizedArrayType *DSAT 2596 = dyn_cast<DependentSizedArrayType>(ATy)) 2597 return cast<ArrayType>( 2598 getDependentSizedArrayType(NewEltTy, 2599 DSAT->getSizeExpr() ? 2600 DSAT->getSizeExpr()->Retain() : 0, 2601 DSAT->getSizeModifier(), 2602 DSAT->getIndexTypeCVRQualifiers(), 2603 DSAT->getBracketsRange())); 2604 2605 const VariableArrayType *VAT = cast<VariableArrayType>(ATy); 2606 return cast<ArrayType>(getVariableArrayType(NewEltTy, 2607 VAT->getSizeExpr() ? 2608 VAT->getSizeExpr()->Retain() : 0, 2609 VAT->getSizeModifier(), 2610 VAT->getIndexTypeCVRQualifiers(), 2611 VAT->getBracketsRange())); 2612} 2613 2614 2615/// getArrayDecayedType - Return the properly qualified result of decaying the 2616/// specified array type to a pointer. This operation is non-trivial when 2617/// handling typedefs etc. The canonical type of "T" must be an array type, 2618/// this returns a pointer to a properly qualified element of the array. 2619/// 2620/// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 2621QualType ASTContext::getArrayDecayedType(QualType Ty) { 2622 // Get the element type with 'getAsArrayType' so that we don't lose any 2623 // typedefs in the element type of the array. This also handles propagation 2624 // of type qualifiers from the array type into the element type if present 2625 // (C99 6.7.3p8). 2626 const ArrayType *PrettyArrayType = getAsArrayType(Ty); 2627 assert(PrettyArrayType && "Not an array type!"); 2628 2629 QualType PtrTy = getPointerType(PrettyArrayType->getElementType()); 2630 2631 // int x[restrict 4] -> int *restrict 2632 return getQualifiedType(PtrTy, PrettyArrayType->getIndexTypeQualifiers()); 2633} 2634 2635QualType ASTContext::getBaseElementType(QualType QT) { 2636 QualifierCollector Qs; 2637 while (true) { 2638 const Type *UT = Qs.strip(QT); 2639 if (const ArrayType *AT = getAsArrayType(QualType(UT,0))) { 2640 QT = AT->getElementType(); 2641 } else { 2642 return Qs.apply(QT); 2643 } 2644 } 2645} 2646 2647QualType ASTContext::getBaseElementType(const ArrayType *AT) { 2648 QualType ElemTy = AT->getElementType(); 2649 2650 if (const ArrayType *AT = getAsArrayType(ElemTy)) 2651 return getBaseElementType(AT); 2652 2653 return ElemTy; 2654} 2655 2656/// getConstantArrayElementCount - Returns number of constant array elements. 2657uint64_t 2658ASTContext::getConstantArrayElementCount(const ConstantArrayType *CA) const { 2659 uint64_t ElementCount = 1; 2660 do { 2661 ElementCount *= CA->getSize().getZExtValue(); 2662 CA = dyn_cast<ConstantArrayType>(CA->getElementType()); 2663 } while (CA); 2664 return ElementCount; 2665} 2666 2667/// getFloatingRank - Return a relative rank for floating point types. 2668/// This routine will assert if passed a built-in type that isn't a float. 2669static FloatingRank getFloatingRank(QualType T) { 2670 if (const ComplexType *CT = T->getAs<ComplexType>()) 2671 return getFloatingRank(CT->getElementType()); 2672 2673 assert(T->getAs<BuiltinType>() && "getFloatingRank(): not a floating type"); 2674 switch (T->getAs<BuiltinType>()->getKind()) { 2675 default: assert(0 && "getFloatingRank(): not a floating type"); 2676 case BuiltinType::Float: return FloatRank; 2677 case BuiltinType::Double: return DoubleRank; 2678 case BuiltinType::LongDouble: return LongDoubleRank; 2679 } 2680} 2681 2682/// getFloatingTypeOfSizeWithinDomain - Returns a real floating 2683/// point or a complex type (based on typeDomain/typeSize). 2684/// 'typeDomain' is a real floating point or complex type. 2685/// 'typeSize' is a real floating point or complex type. 2686QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size, 2687 QualType Domain) const { 2688 FloatingRank EltRank = getFloatingRank(Size); 2689 if (Domain->isComplexType()) { 2690 switch (EltRank) { 2691 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2692 case FloatRank: return FloatComplexTy; 2693 case DoubleRank: return DoubleComplexTy; 2694 case LongDoubleRank: return LongDoubleComplexTy; 2695 } 2696 } 2697 2698 assert(Domain->isRealFloatingType() && "Unknown domain!"); 2699 switch (EltRank) { 2700 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2701 case FloatRank: return FloatTy; 2702 case DoubleRank: return DoubleTy; 2703 case LongDoubleRank: return LongDoubleTy; 2704 } 2705} 2706 2707/// getFloatingTypeOrder - Compare the rank of the two specified floating 2708/// point types, ignoring the domain of the type (i.e. 'double' == 2709/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 2710/// LHS < RHS, return -1. 2711int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) { 2712 FloatingRank LHSR = getFloatingRank(LHS); 2713 FloatingRank RHSR = getFloatingRank(RHS); 2714 2715 if (LHSR == RHSR) 2716 return 0; 2717 if (LHSR > RHSR) 2718 return 1; 2719 return -1; 2720} 2721 2722/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This 2723/// routine will assert if passed a built-in type that isn't an integer or enum, 2724/// or if it is not canonicalized. 2725unsigned ASTContext::getIntegerRank(Type *T) { 2726 assert(T->isCanonicalUnqualified() && "T should be canonicalized"); 2727 if (EnumType* ET = dyn_cast<EnumType>(T)) 2728 T = ET->getDecl()->getPromotionType().getTypePtr(); 2729 2730 if (T->isSpecificBuiltinType(BuiltinType::WChar)) 2731 T = getFromTargetType(Target.getWCharType()).getTypePtr(); 2732 2733 if (T->isSpecificBuiltinType(BuiltinType::Char16)) 2734 T = getFromTargetType(Target.getChar16Type()).getTypePtr(); 2735 2736 if (T->isSpecificBuiltinType(BuiltinType::Char32)) 2737 T = getFromTargetType(Target.getChar32Type()).getTypePtr(); 2738 2739 switch (cast<BuiltinType>(T)->getKind()) { 2740 default: assert(0 && "getIntegerRank(): not a built-in integer"); 2741 case BuiltinType::Bool: 2742 return 1 + (getIntWidth(BoolTy) << 3); 2743 case BuiltinType::Char_S: 2744 case BuiltinType::Char_U: 2745 case BuiltinType::SChar: 2746 case BuiltinType::UChar: 2747 return 2 + (getIntWidth(CharTy) << 3); 2748 case BuiltinType::Short: 2749 case BuiltinType::UShort: 2750 return 3 + (getIntWidth(ShortTy) << 3); 2751 case BuiltinType::Int: 2752 case BuiltinType::UInt: 2753 return 4 + (getIntWidth(IntTy) << 3); 2754 case BuiltinType::Long: 2755 case BuiltinType::ULong: 2756 return 5 + (getIntWidth(LongTy) << 3); 2757 case BuiltinType::LongLong: 2758 case BuiltinType::ULongLong: 2759 return 6 + (getIntWidth(LongLongTy) << 3); 2760 case BuiltinType::Int128: 2761 case BuiltinType::UInt128: 2762 return 7 + (getIntWidth(Int128Ty) << 3); 2763 } 2764} 2765 2766/// \brief Whether this is a promotable bitfield reference according 2767/// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 2768/// 2769/// \returns the type this bit-field will promote to, or NULL if no 2770/// promotion occurs. 2771QualType ASTContext::isPromotableBitField(Expr *E) { 2772 FieldDecl *Field = E->getBitField(); 2773 if (!Field) 2774 return QualType(); 2775 2776 QualType FT = Field->getType(); 2777 2778 llvm::APSInt BitWidthAP = Field->getBitWidth()->EvaluateAsInt(*this); 2779 uint64_t BitWidth = BitWidthAP.getZExtValue(); 2780 uint64_t IntSize = getTypeSize(IntTy); 2781 // GCC extension compatibility: if the bit-field size is less than or equal 2782 // to the size of int, it gets promoted no matter what its type is. 2783 // For instance, unsigned long bf : 4 gets promoted to signed int. 2784 if (BitWidth < IntSize) 2785 return IntTy; 2786 2787 if (BitWidth == IntSize) 2788 return FT->isSignedIntegerType() ? IntTy : UnsignedIntTy; 2789 2790 // Types bigger than int are not subject to promotions, and therefore act 2791 // like the base type. 2792 // FIXME: This doesn't quite match what gcc does, but what gcc does here 2793 // is ridiculous. 2794 return QualType(); 2795} 2796 2797/// getPromotedIntegerType - Returns the type that Promotable will 2798/// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 2799/// integer type. 2800QualType ASTContext::getPromotedIntegerType(QualType Promotable) { 2801 assert(!Promotable.isNull()); 2802 assert(Promotable->isPromotableIntegerType()); 2803 if (const EnumType *ET = Promotable->getAs<EnumType>()) 2804 return ET->getDecl()->getPromotionType(); 2805 if (Promotable->isSignedIntegerType()) 2806 return IntTy; 2807 uint64_t PromotableSize = getTypeSize(Promotable); 2808 uint64_t IntSize = getTypeSize(IntTy); 2809 assert(Promotable->isUnsignedIntegerType() && PromotableSize <= IntSize); 2810 return (PromotableSize != IntSize) ? IntTy : UnsignedIntTy; 2811} 2812 2813/// getIntegerTypeOrder - Returns the highest ranked integer type: 2814/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 2815/// LHS < RHS, return -1. 2816int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) { 2817 Type *LHSC = getCanonicalType(LHS).getTypePtr(); 2818 Type *RHSC = getCanonicalType(RHS).getTypePtr(); 2819 if (LHSC == RHSC) return 0; 2820 2821 bool LHSUnsigned = LHSC->isUnsignedIntegerType(); 2822 bool RHSUnsigned = RHSC->isUnsignedIntegerType(); 2823 2824 unsigned LHSRank = getIntegerRank(LHSC); 2825 unsigned RHSRank = getIntegerRank(RHSC); 2826 2827 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned. 2828 if (LHSRank == RHSRank) return 0; 2829 return LHSRank > RHSRank ? 1 : -1; 2830 } 2831 2832 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa. 2833 if (LHSUnsigned) { 2834 // If the unsigned [LHS] type is larger, return it. 2835 if (LHSRank >= RHSRank) 2836 return 1; 2837 2838 // If the signed type can represent all values of the unsigned type, it 2839 // wins. Because we are dealing with 2's complement and types that are 2840 // powers of two larger than each other, this is always safe. 2841 return -1; 2842 } 2843 2844 // If the unsigned [RHS] type is larger, return it. 2845 if (RHSRank >= LHSRank) 2846 return -1; 2847 2848 // If the signed type can represent all values of the unsigned type, it 2849 // wins. Because we are dealing with 2's complement and types that are 2850 // powers of two larger than each other, this is always safe. 2851 return 1; 2852} 2853 2854static RecordDecl * 2855CreateRecordDecl(ASTContext &Ctx, RecordDecl::TagKind TK, DeclContext *DC, 2856 SourceLocation L, IdentifierInfo *Id) { 2857 if (Ctx.getLangOptions().CPlusPlus) 2858 return CXXRecordDecl::Create(Ctx, TK, DC, L, Id); 2859 else 2860 return RecordDecl::Create(Ctx, TK, DC, L, Id); 2861} 2862 2863// getCFConstantStringType - Return the type used for constant CFStrings. 2864QualType ASTContext::getCFConstantStringType() { 2865 if (!CFConstantStringTypeDecl) { 2866 CFConstantStringTypeDecl = 2867 CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 2868 &Idents.get("NSConstantString")); 2869 CFConstantStringTypeDecl->startDefinition(); 2870 2871 QualType FieldTypes[4]; 2872 2873 // const int *isa; 2874 FieldTypes[0] = getPointerType(IntTy.withConst()); 2875 // int flags; 2876 FieldTypes[1] = IntTy; 2877 // const char *str; 2878 FieldTypes[2] = getPointerType(CharTy.withConst()); 2879 // long length; 2880 FieldTypes[3] = LongTy; 2881 2882 // Create fields 2883 for (unsigned i = 0; i < 4; ++i) { 2884 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl, 2885 SourceLocation(), 0, 2886 FieldTypes[i], /*TInfo=*/0, 2887 /*BitWidth=*/0, 2888 /*Mutable=*/false); 2889 CFConstantStringTypeDecl->addDecl(Field); 2890 } 2891 2892 CFConstantStringTypeDecl->completeDefinition(); 2893 } 2894 2895 return getTagDeclType(CFConstantStringTypeDecl); 2896} 2897 2898void ASTContext::setCFConstantStringType(QualType T) { 2899 const RecordType *Rec = T->getAs<RecordType>(); 2900 assert(Rec && "Invalid CFConstantStringType"); 2901 CFConstantStringTypeDecl = Rec->getDecl(); 2902} 2903 2904QualType ASTContext::getObjCFastEnumerationStateType() { 2905 if (!ObjCFastEnumerationStateTypeDecl) { 2906 ObjCFastEnumerationStateTypeDecl = 2907 CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 2908 &Idents.get("__objcFastEnumerationState")); 2909 ObjCFastEnumerationStateTypeDecl->startDefinition(); 2910 2911 QualType FieldTypes[] = { 2912 UnsignedLongTy, 2913 getPointerType(ObjCIdTypedefType), 2914 getPointerType(UnsignedLongTy), 2915 getConstantArrayType(UnsignedLongTy, 2916 llvm::APInt(32, 5), ArrayType::Normal, 0) 2917 }; 2918 2919 for (size_t i = 0; i < 4; ++i) { 2920 FieldDecl *Field = FieldDecl::Create(*this, 2921 ObjCFastEnumerationStateTypeDecl, 2922 SourceLocation(), 0, 2923 FieldTypes[i], /*TInfo=*/0, 2924 /*BitWidth=*/0, 2925 /*Mutable=*/false); 2926 ObjCFastEnumerationStateTypeDecl->addDecl(Field); 2927 } 2928 2929 ObjCFastEnumerationStateTypeDecl->completeDefinition(); 2930 } 2931 2932 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 2933} 2934 2935QualType ASTContext::getBlockDescriptorType() { 2936 if (BlockDescriptorType) 2937 return getTagDeclType(BlockDescriptorType); 2938 2939 RecordDecl *T; 2940 // FIXME: Needs the FlagAppleBlock bit. 2941 T = CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 2942 &Idents.get("__block_descriptor")); 2943 T->startDefinition(); 2944 2945 QualType FieldTypes[] = { 2946 UnsignedLongTy, 2947 UnsignedLongTy, 2948 }; 2949 2950 const char *FieldNames[] = { 2951 "reserved", 2952 "Size" 2953 }; 2954 2955 for (size_t i = 0; i < 2; ++i) { 2956 FieldDecl *Field = FieldDecl::Create(*this, 2957 T, 2958 SourceLocation(), 2959 &Idents.get(FieldNames[i]), 2960 FieldTypes[i], /*TInfo=*/0, 2961 /*BitWidth=*/0, 2962 /*Mutable=*/false); 2963 T->addDecl(Field); 2964 } 2965 2966 T->completeDefinition(); 2967 2968 BlockDescriptorType = T; 2969 2970 return getTagDeclType(BlockDescriptorType); 2971} 2972 2973void ASTContext::setBlockDescriptorType(QualType T) { 2974 const RecordType *Rec = T->getAs<RecordType>(); 2975 assert(Rec && "Invalid BlockDescriptorType"); 2976 BlockDescriptorType = Rec->getDecl(); 2977} 2978 2979QualType ASTContext::getBlockDescriptorExtendedType() { 2980 if (BlockDescriptorExtendedType) 2981 return getTagDeclType(BlockDescriptorExtendedType); 2982 2983 RecordDecl *T; 2984 // FIXME: Needs the FlagAppleBlock bit. 2985 T = CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 2986 &Idents.get("__block_descriptor_withcopydispose")); 2987 T->startDefinition(); 2988 2989 QualType FieldTypes[] = { 2990 UnsignedLongTy, 2991 UnsignedLongTy, 2992 getPointerType(VoidPtrTy), 2993 getPointerType(VoidPtrTy) 2994 }; 2995 2996 const char *FieldNames[] = { 2997 "reserved", 2998 "Size", 2999 "CopyFuncPtr", 3000 "DestroyFuncPtr" 3001 }; 3002 3003 for (size_t i = 0; i < 4; ++i) { 3004 FieldDecl *Field = FieldDecl::Create(*this, 3005 T, 3006 SourceLocation(), 3007 &Idents.get(FieldNames[i]), 3008 FieldTypes[i], /*TInfo=*/0, 3009 /*BitWidth=*/0, 3010 /*Mutable=*/false); 3011 T->addDecl(Field); 3012 } 3013 3014 T->completeDefinition(); 3015 3016 BlockDescriptorExtendedType = T; 3017 3018 return getTagDeclType(BlockDescriptorExtendedType); 3019} 3020 3021void ASTContext::setBlockDescriptorExtendedType(QualType T) { 3022 const RecordType *Rec = T->getAs<RecordType>(); 3023 assert(Rec && "Invalid BlockDescriptorType"); 3024 BlockDescriptorExtendedType = Rec->getDecl(); 3025} 3026 3027bool ASTContext::BlockRequiresCopying(QualType Ty) { 3028 if (Ty->isBlockPointerType()) 3029 return true; 3030 if (isObjCNSObjectType(Ty)) 3031 return true; 3032 if (Ty->isObjCObjectPointerType()) 3033 return true; 3034 return false; 3035} 3036 3037QualType ASTContext::BuildByRefType(const char *DeclName, QualType Ty) { 3038 // type = struct __Block_byref_1_X { 3039 // void *__isa; 3040 // struct __Block_byref_1_X *__forwarding; 3041 // unsigned int __flags; 3042 // unsigned int __size; 3043 // void *__copy_helper; // as needed 3044 // void *__destroy_help // as needed 3045 // int X; 3046 // } * 3047 3048 bool HasCopyAndDispose = BlockRequiresCopying(Ty); 3049 3050 // FIXME: Move up 3051 static unsigned int UniqueBlockByRefTypeID = 0; 3052 llvm::SmallString<36> Name; 3053 llvm::raw_svector_ostream(Name) << "__Block_byref_" << 3054 ++UniqueBlockByRefTypeID << '_' << DeclName; 3055 RecordDecl *T; 3056 T = CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 3057 &Idents.get(Name.str())); 3058 T->startDefinition(); 3059 QualType Int32Ty = IntTy; 3060 assert(getIntWidth(IntTy) == 32 && "non-32bit int not supported"); 3061 QualType FieldTypes[] = { 3062 getPointerType(VoidPtrTy), 3063 getPointerType(getTagDeclType(T)), 3064 Int32Ty, 3065 Int32Ty, 3066 getPointerType(VoidPtrTy), 3067 getPointerType(VoidPtrTy), 3068 Ty 3069 }; 3070 3071 const char *FieldNames[] = { 3072 "__isa", 3073 "__forwarding", 3074 "__flags", 3075 "__size", 3076 "__copy_helper", 3077 "__destroy_helper", 3078 DeclName, 3079 }; 3080 3081 for (size_t i = 0; i < 7; ++i) { 3082 if (!HasCopyAndDispose && i >=4 && i <= 5) 3083 continue; 3084 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3085 &Idents.get(FieldNames[i]), 3086 FieldTypes[i], /*TInfo=*/0, 3087 /*BitWidth=*/0, /*Mutable=*/false); 3088 T->addDecl(Field); 3089 } 3090 3091 T->completeDefinition(); 3092 3093 return getPointerType(getTagDeclType(T)); 3094} 3095 3096 3097QualType ASTContext::getBlockParmType( 3098 bool BlockHasCopyDispose, 3099 llvm::SmallVector<const Expr *, 8> &BlockDeclRefDecls) { 3100 // FIXME: Move up 3101 static unsigned int UniqueBlockParmTypeID = 0; 3102 llvm::SmallString<36> Name; 3103 llvm::raw_svector_ostream(Name) << "__block_literal_" 3104 << ++UniqueBlockParmTypeID; 3105 RecordDecl *T; 3106 T = CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 3107 &Idents.get(Name.str())); 3108 T->startDefinition(); 3109 QualType FieldTypes[] = { 3110 getPointerType(VoidPtrTy), 3111 IntTy, 3112 IntTy, 3113 getPointerType(VoidPtrTy), 3114 (BlockHasCopyDispose ? 3115 getPointerType(getBlockDescriptorExtendedType()) : 3116 getPointerType(getBlockDescriptorType())) 3117 }; 3118 3119 const char *FieldNames[] = { 3120 "__isa", 3121 "__flags", 3122 "__reserved", 3123 "__FuncPtr", 3124 "__descriptor" 3125 }; 3126 3127 for (size_t i = 0; i < 5; ++i) { 3128 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3129 &Idents.get(FieldNames[i]), 3130 FieldTypes[i], /*TInfo=*/0, 3131 /*BitWidth=*/0, /*Mutable=*/false); 3132 T->addDecl(Field); 3133 } 3134 3135 for (size_t i = 0; i < BlockDeclRefDecls.size(); ++i) { 3136 const Expr *E = BlockDeclRefDecls[i]; 3137 const BlockDeclRefExpr *BDRE = dyn_cast<BlockDeclRefExpr>(E); 3138 clang::IdentifierInfo *Name = 0; 3139 if (BDRE) { 3140 const ValueDecl *D = BDRE->getDecl(); 3141 Name = &Idents.get(D->getName()); 3142 } 3143 QualType FieldType = E->getType(); 3144 3145 if (BDRE && BDRE->isByRef()) 3146 FieldType = BuildByRefType(BDRE->getDecl()->getNameAsCString(), 3147 FieldType); 3148 3149 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3150 Name, FieldType, /*TInfo=*/0, 3151 /*BitWidth=*/0, /*Mutable=*/false); 3152 T->addDecl(Field); 3153 } 3154 3155 T->completeDefinition(); 3156 3157 return getPointerType(getTagDeclType(T)); 3158} 3159 3160void ASTContext::setObjCFastEnumerationStateType(QualType T) { 3161 const RecordType *Rec = T->getAs<RecordType>(); 3162 assert(Rec && "Invalid ObjCFAstEnumerationStateType"); 3163 ObjCFastEnumerationStateTypeDecl = Rec->getDecl(); 3164} 3165 3166// This returns true if a type has been typedefed to BOOL: 3167// typedef <type> BOOL; 3168static bool isTypeTypedefedAsBOOL(QualType T) { 3169 if (const TypedefType *TT = dyn_cast<TypedefType>(T)) 3170 if (IdentifierInfo *II = TT->getDecl()->getIdentifier()) 3171 return II->isStr("BOOL"); 3172 3173 return false; 3174} 3175 3176/// getObjCEncodingTypeSize returns size of type for objective-c encoding 3177/// purpose. 3178CharUnits ASTContext::getObjCEncodingTypeSize(QualType type) { 3179 CharUnits sz = getTypeSizeInChars(type); 3180 3181 // Make all integer and enum types at least as large as an int 3182 if (sz.isPositive() && type->isIntegralType()) 3183 sz = std::max(sz, getTypeSizeInChars(IntTy)); 3184 // Treat arrays as pointers, since that's how they're passed in. 3185 else if (type->isArrayType()) 3186 sz = getTypeSizeInChars(VoidPtrTy); 3187 return sz; 3188} 3189 3190static inline 3191std::string charUnitsToString(const CharUnits &CU) { 3192 return llvm::itostr(CU.getQuantity()); 3193} 3194 3195/// getObjCEncodingForBlockDecl - Return the encoded type for this block 3196/// declaration. 3197void ASTContext::getObjCEncodingForBlock(const BlockExpr *Expr, 3198 std::string& S) { 3199 const BlockDecl *Decl = Expr->getBlockDecl(); 3200 QualType BlockTy = 3201 Expr->getType()->getAs<BlockPointerType>()->getPointeeType(); 3202 // Encode result type. 3203 getObjCEncodingForType(cast<FunctionType>(BlockTy)->getResultType(), S); 3204 // Compute size of all parameters. 3205 // Start with computing size of a pointer in number of bytes. 3206 // FIXME: There might(should) be a better way of doing this computation! 3207 SourceLocation Loc; 3208 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3209 CharUnits ParmOffset = PtrSize; 3210 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), 3211 E = Decl->param_end(); PI != E; ++PI) { 3212 QualType PType = (*PI)->getType(); 3213 CharUnits sz = getObjCEncodingTypeSize(PType); 3214 assert (sz.isPositive() && "BlockExpr - Incomplete param type"); 3215 ParmOffset += sz; 3216 } 3217 // Size of the argument frame 3218 S += charUnitsToString(ParmOffset); 3219 // Block pointer and offset. 3220 S += "@?0"; 3221 ParmOffset = PtrSize; 3222 3223 // Argument types. 3224 ParmOffset = PtrSize; 3225 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), E = 3226 Decl->param_end(); PI != E; ++PI) { 3227 ParmVarDecl *PVDecl = *PI; 3228 QualType PType = PVDecl->getOriginalType(); 3229 if (const ArrayType *AT = 3230 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3231 // Use array's original type only if it has known number of 3232 // elements. 3233 if (!isa<ConstantArrayType>(AT)) 3234 PType = PVDecl->getType(); 3235 } else if (PType->isFunctionType()) 3236 PType = PVDecl->getType(); 3237 getObjCEncodingForType(PType, S); 3238 S += charUnitsToString(ParmOffset); 3239 ParmOffset += getObjCEncodingTypeSize(PType); 3240 } 3241} 3242 3243/// getObjCEncodingForMethodDecl - Return the encoded type for this method 3244/// declaration. 3245void ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, 3246 std::string& S) { 3247 // FIXME: This is not very efficient. 3248 // Encode type qualifer, 'in', 'inout', etc. for the return type. 3249 getObjCEncodingForTypeQualifier(Decl->getObjCDeclQualifier(), S); 3250 // Encode result type. 3251 getObjCEncodingForType(Decl->getResultType(), S); 3252 // Compute size of all parameters. 3253 // Start with computing size of a pointer in number of bytes. 3254 // FIXME: There might(should) be a better way of doing this computation! 3255 SourceLocation Loc; 3256 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3257 // The first two arguments (self and _cmd) are pointers; account for 3258 // their size. 3259 CharUnits ParmOffset = 2 * PtrSize; 3260 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3261 E = Decl->param_end(); PI != E; ++PI) { 3262 QualType PType = (*PI)->getType(); 3263 CharUnits sz = getObjCEncodingTypeSize(PType); 3264 assert (sz.isPositive() && 3265 "getObjCEncodingForMethodDecl - Incomplete param type"); 3266 ParmOffset += sz; 3267 } 3268 S += charUnitsToString(ParmOffset); 3269 S += "@0:"; 3270 S += charUnitsToString(PtrSize); 3271 3272 // Argument types. 3273 ParmOffset = 2 * PtrSize; 3274 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3275 E = Decl->param_end(); PI != E; ++PI) { 3276 ParmVarDecl *PVDecl = *PI; 3277 QualType PType = PVDecl->getOriginalType(); 3278 if (const ArrayType *AT = 3279 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3280 // Use array's original type only if it has known number of 3281 // elements. 3282 if (!isa<ConstantArrayType>(AT)) 3283 PType = PVDecl->getType(); 3284 } else if (PType->isFunctionType()) 3285 PType = PVDecl->getType(); 3286 // Process argument qualifiers for user supplied arguments; such as, 3287 // 'in', 'inout', etc. 3288 getObjCEncodingForTypeQualifier(PVDecl->getObjCDeclQualifier(), S); 3289 getObjCEncodingForType(PType, S); 3290 S += charUnitsToString(ParmOffset); 3291 ParmOffset += getObjCEncodingTypeSize(PType); 3292 } 3293} 3294 3295/// getObjCEncodingForPropertyDecl - Return the encoded type for this 3296/// property declaration. If non-NULL, Container must be either an 3297/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be 3298/// NULL when getting encodings for protocol properties. 3299/// Property attributes are stored as a comma-delimited C string. The simple 3300/// attributes readonly and bycopy are encoded as single characters. The 3301/// parametrized attributes, getter=name, setter=name, and ivar=name, are 3302/// encoded as single characters, followed by an identifier. Property types 3303/// are also encoded as a parametrized attribute. The characters used to encode 3304/// these attributes are defined by the following enumeration: 3305/// @code 3306/// enum PropertyAttributes { 3307/// kPropertyReadOnly = 'R', // property is read-only. 3308/// kPropertyBycopy = 'C', // property is a copy of the value last assigned 3309/// kPropertyByref = '&', // property is a reference to the value last assigned 3310/// kPropertyDynamic = 'D', // property is dynamic 3311/// kPropertyGetter = 'G', // followed by getter selector name 3312/// kPropertySetter = 'S', // followed by setter selector name 3313/// kPropertyInstanceVariable = 'V' // followed by instance variable name 3314/// kPropertyType = 't' // followed by old-style type encoding. 3315/// kPropertyWeak = 'W' // 'weak' property 3316/// kPropertyStrong = 'P' // property GC'able 3317/// kPropertyNonAtomic = 'N' // property non-atomic 3318/// }; 3319/// @endcode 3320void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 3321 const Decl *Container, 3322 std::string& S) { 3323 // Collect information from the property implementation decl(s). 3324 bool Dynamic = false; 3325 ObjCPropertyImplDecl *SynthesizePID = 0; 3326 3327 // FIXME: Duplicated code due to poor abstraction. 3328 if (Container) { 3329 if (const ObjCCategoryImplDecl *CID = 3330 dyn_cast<ObjCCategoryImplDecl>(Container)) { 3331 for (ObjCCategoryImplDecl::propimpl_iterator 3332 i = CID->propimpl_begin(), e = CID->propimpl_end(); 3333 i != e; ++i) { 3334 ObjCPropertyImplDecl *PID = *i; 3335 if (PID->getPropertyDecl() == PD) { 3336 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3337 Dynamic = true; 3338 } else { 3339 SynthesizePID = PID; 3340 } 3341 } 3342 } 3343 } else { 3344 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container); 3345 for (ObjCCategoryImplDecl::propimpl_iterator 3346 i = OID->propimpl_begin(), e = OID->propimpl_end(); 3347 i != e; ++i) { 3348 ObjCPropertyImplDecl *PID = *i; 3349 if (PID->getPropertyDecl() == PD) { 3350 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3351 Dynamic = true; 3352 } else { 3353 SynthesizePID = PID; 3354 } 3355 } 3356 } 3357 } 3358 } 3359 3360 // FIXME: This is not very efficient. 3361 S = "T"; 3362 3363 // Encode result type. 3364 // GCC has some special rules regarding encoding of properties which 3365 // closely resembles encoding of ivars. 3366 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, 0, 3367 true /* outermost type */, 3368 true /* encoding for property */); 3369 3370 if (PD->isReadOnly()) { 3371 S += ",R"; 3372 } else { 3373 switch (PD->getSetterKind()) { 3374 case ObjCPropertyDecl::Assign: break; 3375 case ObjCPropertyDecl::Copy: S += ",C"; break; 3376 case ObjCPropertyDecl::Retain: S += ",&"; break; 3377 } 3378 } 3379 3380 // It really isn't clear at all what this means, since properties 3381 // are "dynamic by default". 3382 if (Dynamic) 3383 S += ",D"; 3384 3385 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) 3386 S += ",N"; 3387 3388 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) { 3389 S += ",G"; 3390 S += PD->getGetterName().getAsString(); 3391 } 3392 3393 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) { 3394 S += ",S"; 3395 S += PD->getSetterName().getAsString(); 3396 } 3397 3398 if (SynthesizePID) { 3399 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl(); 3400 S += ",V"; 3401 S += OID->getNameAsString(); 3402 } 3403 3404 // FIXME: OBJCGC: weak & strong 3405} 3406 3407/// getLegacyIntegralTypeEncoding - 3408/// Another legacy compatibility encoding: 32-bit longs are encoded as 3409/// 'l' or 'L' , but not always. For typedefs, we need to use 3410/// 'i' or 'I' instead if encoding a struct field, or a pointer! 3411/// 3412void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const { 3413 if (isa<TypedefType>(PointeeTy.getTypePtr())) { 3414 if (const BuiltinType *BT = PointeeTy->getAs<BuiltinType>()) { 3415 if (BT->getKind() == BuiltinType::ULong && 3416 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3417 PointeeTy = UnsignedIntTy; 3418 else 3419 if (BT->getKind() == BuiltinType::Long && 3420 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3421 PointeeTy = IntTy; 3422 } 3423 } 3424} 3425 3426void ASTContext::getObjCEncodingForType(QualType T, std::string& S, 3427 const FieldDecl *Field) { 3428 // We follow the behavior of gcc, expanding structures which are 3429 // directly pointed to, and expanding embedded structures. Note that 3430 // these rules are sufficient to prevent recursive encoding of the 3431 // same type. 3432 getObjCEncodingForTypeImpl(T, S, true, true, Field, 3433 true /* outermost type */); 3434} 3435 3436static void EncodeBitField(const ASTContext *Context, std::string& S, 3437 const FieldDecl *FD) { 3438 const Expr *E = FD->getBitWidth(); 3439 assert(E && "bitfield width not there - getObjCEncodingForTypeImpl"); 3440 ASTContext *Ctx = const_cast<ASTContext*>(Context); 3441 unsigned N = E->EvaluateAsInt(*Ctx).getZExtValue(); 3442 S += 'b'; 3443 S += llvm::utostr(N); 3444} 3445 3446// FIXME: Use SmallString for accumulating string. 3447void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S, 3448 bool ExpandPointedToStructures, 3449 bool ExpandStructures, 3450 const FieldDecl *FD, 3451 bool OutermostType, 3452 bool EncodingProperty) { 3453 if (const BuiltinType *BT = T->getAs<BuiltinType>()) { 3454 if (FD && FD->isBitField()) 3455 return EncodeBitField(this, S, FD); 3456 char encoding; 3457 switch (BT->getKind()) { 3458 default: assert(0 && "Unhandled builtin type kind"); 3459 case BuiltinType::Void: encoding = 'v'; break; 3460 case BuiltinType::Bool: encoding = 'B'; break; 3461 case BuiltinType::Char_U: 3462 case BuiltinType::UChar: encoding = 'C'; break; 3463 case BuiltinType::UShort: encoding = 'S'; break; 3464 case BuiltinType::UInt: encoding = 'I'; break; 3465 case BuiltinType::ULong: 3466 encoding = 3467 (const_cast<ASTContext *>(this))->getIntWidth(T) == 32 ? 'L' : 'Q'; 3468 break; 3469 case BuiltinType::UInt128: encoding = 'T'; break; 3470 case BuiltinType::ULongLong: encoding = 'Q'; break; 3471 case BuiltinType::Char_S: 3472 case BuiltinType::SChar: encoding = 'c'; break; 3473 case BuiltinType::Short: encoding = 's'; break; 3474 case BuiltinType::Int: encoding = 'i'; break; 3475 case BuiltinType::Long: 3476 encoding = 3477 (const_cast<ASTContext *>(this))->getIntWidth(T) == 32 ? 'l' : 'q'; 3478 break; 3479 case BuiltinType::LongLong: encoding = 'q'; break; 3480 case BuiltinType::Int128: encoding = 't'; break; 3481 case BuiltinType::Float: encoding = 'f'; break; 3482 case BuiltinType::Double: encoding = 'd'; break; 3483 case BuiltinType::LongDouble: encoding = 'd'; break; 3484 } 3485 3486 S += encoding; 3487 return; 3488 } 3489 3490 if (const ComplexType *CT = T->getAs<ComplexType>()) { 3491 S += 'j'; 3492 getObjCEncodingForTypeImpl(CT->getElementType(), S, false, false, 0, false, 3493 false); 3494 return; 3495 } 3496 3497 if (const PointerType *PT = T->getAs<PointerType>()) { 3498 if (PT->isObjCSelType()) { 3499 S += ':'; 3500 return; 3501 } 3502 QualType PointeeTy = PT->getPointeeType(); 3503 3504 bool isReadOnly = false; 3505 // For historical/compatibility reasons, the read-only qualifier of the 3506 // pointee gets emitted _before_ the '^'. The read-only qualifier of 3507 // the pointer itself gets ignored, _unless_ we are looking at a typedef! 3508 // Also, do not emit the 'r' for anything but the outermost type! 3509 if (isa<TypedefType>(T.getTypePtr())) { 3510 if (OutermostType && T.isConstQualified()) { 3511 isReadOnly = true; 3512 S += 'r'; 3513 } 3514 } else if (OutermostType) { 3515 QualType P = PointeeTy; 3516 while (P->getAs<PointerType>()) 3517 P = P->getAs<PointerType>()->getPointeeType(); 3518 if (P.isConstQualified()) { 3519 isReadOnly = true; 3520 S += 'r'; 3521 } 3522 } 3523 if (isReadOnly) { 3524 // Another legacy compatibility encoding. Some ObjC qualifier and type 3525 // combinations need to be rearranged. 3526 // Rewrite "in const" from "nr" to "rn" 3527 const char * s = S.c_str(); 3528 int len = S.length(); 3529 if (len >= 2 && s[len-2] == 'n' && s[len-1] == 'r') { 3530 std::string replace = "rn"; 3531 S.replace(S.end()-2, S.end(), replace); 3532 } 3533 } 3534 3535 if (PointeeTy->isCharType()) { 3536 // char pointer types should be encoded as '*' unless it is a 3537 // type that has been typedef'd to 'BOOL'. 3538 if (!isTypeTypedefedAsBOOL(PointeeTy)) { 3539 S += '*'; 3540 return; 3541 } 3542 } else if (const RecordType *RTy = PointeeTy->getAs<RecordType>()) { 3543 // GCC binary compat: Need to convert "struct objc_class *" to "#". 3544 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_class")) { 3545 S += '#'; 3546 return; 3547 } 3548 // GCC binary compat: Need to convert "struct objc_object *" to "@". 3549 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_object")) { 3550 S += '@'; 3551 return; 3552 } 3553 // fall through... 3554 } 3555 S += '^'; 3556 getLegacyIntegralTypeEncoding(PointeeTy); 3557 3558 getObjCEncodingForTypeImpl(PointeeTy, S, false, ExpandPointedToStructures, 3559 NULL); 3560 return; 3561 } 3562 3563 if (const ArrayType *AT = 3564 // Ignore type qualifiers etc. 3565 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) { 3566 if (isa<IncompleteArrayType>(AT)) { 3567 // Incomplete arrays are encoded as a pointer to the array element. 3568 S += '^'; 3569 3570 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3571 false, ExpandStructures, FD); 3572 } else { 3573 S += '['; 3574 3575 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 3576 S += llvm::utostr(CAT->getSize().getZExtValue()); 3577 else { 3578 //Variable length arrays are encoded as a regular array with 0 elements. 3579 assert(isa<VariableArrayType>(AT) && "Unknown array type!"); 3580 S += '0'; 3581 } 3582 3583 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3584 false, ExpandStructures, FD); 3585 S += ']'; 3586 } 3587 return; 3588 } 3589 3590 if (T->getAs<FunctionType>()) { 3591 S += '?'; 3592 return; 3593 } 3594 3595 if (const RecordType *RTy = T->getAs<RecordType>()) { 3596 RecordDecl *RDecl = RTy->getDecl(); 3597 S += RDecl->isUnion() ? '(' : '{'; 3598 // Anonymous structures print as '?' 3599 if (const IdentifierInfo *II = RDecl->getIdentifier()) { 3600 S += II->getName(); 3601 } else { 3602 S += '?'; 3603 } 3604 if (ExpandStructures) { 3605 S += '='; 3606 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 3607 FieldEnd = RDecl->field_end(); 3608 Field != FieldEnd; ++Field) { 3609 if (FD) { 3610 S += '"'; 3611 S += Field->getNameAsString(); 3612 S += '"'; 3613 } 3614 3615 // Special case bit-fields. 3616 if (Field->isBitField()) { 3617 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, 3618 (*Field)); 3619 } else { 3620 QualType qt = Field->getType(); 3621 getLegacyIntegralTypeEncoding(qt); 3622 getObjCEncodingForTypeImpl(qt, S, false, true, 3623 FD); 3624 } 3625 } 3626 } 3627 S += RDecl->isUnion() ? ')' : '}'; 3628 return; 3629 } 3630 3631 if (T->isEnumeralType()) { 3632 if (FD && FD->isBitField()) 3633 EncodeBitField(this, S, FD); 3634 else 3635 S += 'i'; 3636 return; 3637 } 3638 3639 if (T->isBlockPointerType()) { 3640 S += "@?"; // Unlike a pointer-to-function, which is "^?". 3641 return; 3642 } 3643 3644 if (const ObjCInterfaceType *OIT = T->getAs<ObjCInterfaceType>()) { 3645 // @encode(class_name) 3646 ObjCInterfaceDecl *OI = OIT->getDecl(); 3647 S += '{'; 3648 const IdentifierInfo *II = OI->getIdentifier(); 3649 S += II->getName(); 3650 S += '='; 3651 llvm::SmallVector<FieldDecl*, 32> RecFields; 3652 CollectObjCIvars(OI, RecFields); 3653 for (unsigned i = 0, e = RecFields.size(); i != e; ++i) { 3654 if (RecFields[i]->isBitField()) 3655 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 3656 RecFields[i]); 3657 else 3658 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 3659 FD); 3660 } 3661 S += '}'; 3662 return; 3663 } 3664 3665 if (const ObjCObjectPointerType *OPT = T->getAs<ObjCObjectPointerType>()) { 3666 if (OPT->isObjCIdType()) { 3667 S += '@'; 3668 return; 3669 } 3670 3671 if (OPT->isObjCClassType() || OPT->isObjCQualifiedClassType()) { 3672 // FIXME: Consider if we need to output qualifiers for 'Class<p>'. 3673 // Since this is a binary compatibility issue, need to consult with runtime 3674 // folks. Fortunately, this is a *very* obsure construct. 3675 S += '#'; 3676 return; 3677 } 3678 3679 if (OPT->isObjCQualifiedIdType()) { 3680 getObjCEncodingForTypeImpl(getObjCIdType(), S, 3681 ExpandPointedToStructures, 3682 ExpandStructures, FD); 3683 if (FD || EncodingProperty) { 3684 // Note that we do extended encoding of protocol qualifer list 3685 // Only when doing ivar or property encoding. 3686 S += '"'; 3687 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 3688 E = OPT->qual_end(); I != E; ++I) { 3689 S += '<'; 3690 S += (*I)->getNameAsString(); 3691 S += '>'; 3692 } 3693 S += '"'; 3694 } 3695 return; 3696 } 3697 3698 QualType PointeeTy = OPT->getPointeeType(); 3699 if (!EncodingProperty && 3700 isa<TypedefType>(PointeeTy.getTypePtr())) { 3701 // Another historical/compatibility reason. 3702 // We encode the underlying type which comes out as 3703 // {...}; 3704 S += '^'; 3705 getObjCEncodingForTypeImpl(PointeeTy, S, 3706 false, ExpandPointedToStructures, 3707 NULL); 3708 return; 3709 } 3710 3711 S += '@'; 3712 if (OPT->getInterfaceDecl() && (FD || EncodingProperty)) { 3713 S += '"'; 3714 S += OPT->getInterfaceDecl()->getIdentifier()->getName(); 3715 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 3716 E = OPT->qual_end(); I != E; ++I) { 3717 S += '<'; 3718 S += (*I)->getNameAsString(); 3719 S += '>'; 3720 } 3721 S += '"'; 3722 } 3723 return; 3724 } 3725 3726 assert(0 && "@encode for type not implemented!"); 3727} 3728 3729void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 3730 std::string& S) const { 3731 if (QT & Decl::OBJC_TQ_In) 3732 S += 'n'; 3733 if (QT & Decl::OBJC_TQ_Inout) 3734 S += 'N'; 3735 if (QT & Decl::OBJC_TQ_Out) 3736 S += 'o'; 3737 if (QT & Decl::OBJC_TQ_Bycopy) 3738 S += 'O'; 3739 if (QT & Decl::OBJC_TQ_Byref) 3740 S += 'R'; 3741 if (QT & Decl::OBJC_TQ_Oneway) 3742 S += 'V'; 3743} 3744 3745void ASTContext::setBuiltinVaListType(QualType T) { 3746 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!"); 3747 3748 BuiltinVaListType = T; 3749} 3750 3751void ASTContext::setObjCIdType(QualType T) { 3752 ObjCIdTypedefType = T; 3753} 3754 3755void ASTContext::setObjCSelType(QualType T) { 3756 ObjCSelTypedefType = T; 3757} 3758 3759void ASTContext::setObjCProtoType(QualType QT) { 3760 ObjCProtoType = QT; 3761} 3762 3763void ASTContext::setObjCClassType(QualType T) { 3764 ObjCClassTypedefType = T; 3765} 3766 3767void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) { 3768 assert(ObjCConstantStringType.isNull() && 3769 "'NSConstantString' type already set!"); 3770 3771 ObjCConstantStringType = getObjCInterfaceType(Decl); 3772} 3773 3774/// \brief Retrieve the template name that corresponds to a non-empty 3775/// lookup. 3776TemplateName ASTContext::getOverloadedTemplateName(UnresolvedSetIterator Begin, 3777 UnresolvedSetIterator End) { 3778 unsigned size = End - Begin; 3779 assert(size > 1 && "set is not overloaded!"); 3780 3781 void *memory = Allocate(sizeof(OverloadedTemplateStorage) + 3782 size * sizeof(FunctionTemplateDecl*)); 3783 OverloadedTemplateStorage *OT = new(memory) OverloadedTemplateStorage(size); 3784 3785 NamedDecl **Storage = OT->getStorage(); 3786 for (UnresolvedSetIterator I = Begin; I != End; ++I) { 3787 NamedDecl *D = *I; 3788 assert(isa<FunctionTemplateDecl>(D) || 3789 (isa<UsingShadowDecl>(D) && 3790 isa<FunctionTemplateDecl>(D->getUnderlyingDecl()))); 3791 *Storage++ = D; 3792 } 3793 3794 return TemplateName(OT); 3795} 3796 3797/// \brief Retrieve the template name that represents a qualified 3798/// template name such as \c std::vector. 3799TemplateName ASTContext::getQualifiedTemplateName(NestedNameSpecifier *NNS, 3800 bool TemplateKeyword, 3801 TemplateDecl *Template) { 3802 // FIXME: Canonicalization? 3803 llvm::FoldingSetNodeID ID; 3804 QualifiedTemplateName::Profile(ID, NNS, TemplateKeyword, Template); 3805 3806 void *InsertPos = 0; 3807 QualifiedTemplateName *QTN = 3808 QualifiedTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3809 if (!QTN) { 3810 QTN = new (*this,4) QualifiedTemplateName(NNS, TemplateKeyword, Template); 3811 QualifiedTemplateNames.InsertNode(QTN, InsertPos); 3812 } 3813 3814 return TemplateName(QTN); 3815} 3816 3817/// \brief Retrieve the template name that represents a dependent 3818/// template name such as \c MetaFun::template apply. 3819TemplateName ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 3820 const IdentifierInfo *Name) { 3821 assert((!NNS || NNS->isDependent()) && 3822 "Nested name specifier must be dependent"); 3823 3824 llvm::FoldingSetNodeID ID; 3825 DependentTemplateName::Profile(ID, NNS, Name); 3826 3827 void *InsertPos = 0; 3828 DependentTemplateName *QTN = 3829 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3830 3831 if (QTN) 3832 return TemplateName(QTN); 3833 3834 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 3835 if (CanonNNS == NNS) { 3836 QTN = new (*this,4) DependentTemplateName(NNS, Name); 3837 } else { 3838 TemplateName Canon = getDependentTemplateName(CanonNNS, Name); 3839 QTN = new (*this,4) DependentTemplateName(NNS, Name, Canon); 3840 DependentTemplateName *CheckQTN = 3841 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3842 assert(!CheckQTN && "Dependent type name canonicalization broken"); 3843 (void)CheckQTN; 3844 } 3845 3846 DependentTemplateNames.InsertNode(QTN, InsertPos); 3847 return TemplateName(QTN); 3848} 3849 3850/// \brief Retrieve the template name that represents a dependent 3851/// template name such as \c MetaFun::template operator+. 3852TemplateName 3853ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 3854 OverloadedOperatorKind Operator) { 3855 assert((!NNS || NNS->isDependent()) && 3856 "Nested name specifier must be dependent"); 3857 3858 llvm::FoldingSetNodeID ID; 3859 DependentTemplateName::Profile(ID, NNS, Operator); 3860 3861 void *InsertPos = 0; 3862 DependentTemplateName *QTN 3863 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3864 3865 if (QTN) 3866 return TemplateName(QTN); 3867 3868 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 3869 if (CanonNNS == NNS) { 3870 QTN = new (*this,4) DependentTemplateName(NNS, Operator); 3871 } else { 3872 TemplateName Canon = getDependentTemplateName(CanonNNS, Operator); 3873 QTN = new (*this,4) DependentTemplateName(NNS, Operator, Canon); 3874 3875 DependentTemplateName *CheckQTN 3876 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3877 assert(!CheckQTN && "Dependent template name canonicalization broken"); 3878 (void)CheckQTN; 3879 } 3880 3881 DependentTemplateNames.InsertNode(QTN, InsertPos); 3882 return TemplateName(QTN); 3883} 3884 3885/// getFromTargetType - Given one of the integer types provided by 3886/// TargetInfo, produce the corresponding type. The unsigned @p Type 3887/// is actually a value of type @c TargetInfo::IntType. 3888CanQualType ASTContext::getFromTargetType(unsigned Type) const { 3889 switch (Type) { 3890 case TargetInfo::NoInt: return CanQualType(); 3891 case TargetInfo::SignedShort: return ShortTy; 3892 case TargetInfo::UnsignedShort: return UnsignedShortTy; 3893 case TargetInfo::SignedInt: return IntTy; 3894 case TargetInfo::UnsignedInt: return UnsignedIntTy; 3895 case TargetInfo::SignedLong: return LongTy; 3896 case TargetInfo::UnsignedLong: return UnsignedLongTy; 3897 case TargetInfo::SignedLongLong: return LongLongTy; 3898 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy; 3899 } 3900 3901 assert(false && "Unhandled TargetInfo::IntType value"); 3902 return CanQualType(); 3903} 3904 3905//===----------------------------------------------------------------------===// 3906// Type Predicates. 3907//===----------------------------------------------------------------------===// 3908 3909/// isObjCNSObjectType - Return true if this is an NSObject object using 3910/// NSObject attribute on a c-style pointer type. 3911/// FIXME - Make it work directly on types. 3912/// FIXME: Move to Type. 3913/// 3914bool ASTContext::isObjCNSObjectType(QualType Ty) const { 3915 if (TypedefType *TDT = dyn_cast<TypedefType>(Ty)) { 3916 if (TypedefDecl *TD = TDT->getDecl()) 3917 if (TD->getAttr<ObjCNSObjectAttr>()) 3918 return true; 3919 } 3920 return false; 3921} 3922 3923/// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 3924/// garbage collection attribute. 3925/// 3926Qualifiers::GC ASTContext::getObjCGCAttrKind(const QualType &Ty) const { 3927 Qualifiers::GC GCAttrs = Qualifiers::GCNone; 3928 if (getLangOptions().ObjC1 && 3929 getLangOptions().getGCMode() != LangOptions::NonGC) { 3930 GCAttrs = Ty.getObjCGCAttr(); 3931 // Default behavious under objective-c's gc is for objective-c pointers 3932 // (or pointers to them) be treated as though they were declared 3933 // as __strong. 3934 if (GCAttrs == Qualifiers::GCNone) { 3935 if (Ty->isObjCObjectPointerType() || Ty->isBlockPointerType()) 3936 GCAttrs = Qualifiers::Strong; 3937 else if (Ty->isPointerType()) 3938 return getObjCGCAttrKind(Ty->getAs<PointerType>()->getPointeeType()); 3939 } 3940 // Non-pointers have none gc'able attribute regardless of the attribute 3941 // set on them. 3942 else if (!Ty->isAnyPointerType() && !Ty->isBlockPointerType()) 3943 return Qualifiers::GCNone; 3944 } 3945 return GCAttrs; 3946} 3947 3948//===----------------------------------------------------------------------===// 3949// Type Compatibility Testing 3950//===----------------------------------------------------------------------===// 3951 3952/// areCompatVectorTypes - Return true if the two specified vector types are 3953/// compatible. 3954static bool areCompatVectorTypes(const VectorType *LHS, 3955 const VectorType *RHS) { 3956 assert(LHS->isCanonicalUnqualified() && RHS->isCanonicalUnqualified()); 3957 return LHS->getElementType() == RHS->getElementType() && 3958 LHS->getNumElements() == RHS->getNumElements(); 3959} 3960 3961//===----------------------------------------------------------------------===// 3962// ObjCQualifiedIdTypesAreCompatible - Compatibility testing for qualified id's. 3963//===----------------------------------------------------------------------===// 3964 3965/// ProtocolCompatibleWithProtocol - return 'true' if 'lProto' is in the 3966/// inheritance hierarchy of 'rProto'. 3967bool ASTContext::ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 3968 ObjCProtocolDecl *rProto) { 3969 if (lProto == rProto) 3970 return true; 3971 for (ObjCProtocolDecl::protocol_iterator PI = rProto->protocol_begin(), 3972 E = rProto->protocol_end(); PI != E; ++PI) 3973 if (ProtocolCompatibleWithProtocol(lProto, *PI)) 3974 return true; 3975 return false; 3976} 3977 3978/// QualifiedIdConformsQualifiedId - compare id<p,...> with id<p1,...> 3979/// return true if lhs's protocols conform to rhs's protocol; false 3980/// otherwise. 3981bool ASTContext::QualifiedIdConformsQualifiedId(QualType lhs, QualType rhs) { 3982 if (lhs->isObjCQualifiedIdType() && rhs->isObjCQualifiedIdType()) 3983 return ObjCQualifiedIdTypesAreCompatible(lhs, rhs, false); 3984 return false; 3985} 3986 3987/// ObjCQualifiedIdTypesAreCompatible - We know that one of lhs/rhs is an 3988/// ObjCQualifiedIDType. 3989bool ASTContext::ObjCQualifiedIdTypesAreCompatible(QualType lhs, QualType rhs, 3990 bool compare) { 3991 // Allow id<P..> and an 'id' or void* type in all cases. 3992 if (lhs->isVoidPointerType() || 3993 lhs->isObjCIdType() || lhs->isObjCClassType()) 3994 return true; 3995 else if (rhs->isVoidPointerType() || 3996 rhs->isObjCIdType() || rhs->isObjCClassType()) 3997 return true; 3998 3999 if (const ObjCObjectPointerType *lhsQID = lhs->getAsObjCQualifiedIdType()) { 4000 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 4001 4002 if (!rhsOPT) return false; 4003 4004 if (rhsOPT->qual_empty()) { 4005 // If the RHS is a unqualified interface pointer "NSString*", 4006 // make sure we check the class hierarchy. 4007 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4008 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4009 E = lhsQID->qual_end(); I != E; ++I) { 4010 // when comparing an id<P> on lhs with a static type on rhs, 4011 // see if static class implements all of id's protocols, directly or 4012 // through its super class and categories. 4013 if (!rhsID->ClassImplementsProtocol(*I, true)) 4014 return false; 4015 } 4016 } 4017 // If there are no qualifiers and no interface, we have an 'id'. 4018 return true; 4019 } 4020 // Both the right and left sides have qualifiers. 4021 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4022 E = lhsQID->qual_end(); I != E; ++I) { 4023 ObjCProtocolDecl *lhsProto = *I; 4024 bool match = false; 4025 4026 // when comparing an id<P> on lhs with a static type on rhs, 4027 // see if static class implements all of id's protocols, directly or 4028 // through its super class and categories. 4029 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 4030 E = rhsOPT->qual_end(); J != E; ++J) { 4031 ObjCProtocolDecl *rhsProto = *J; 4032 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4033 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4034 match = true; 4035 break; 4036 } 4037 } 4038 // If the RHS is a qualified interface pointer "NSString<P>*", 4039 // make sure we check the class hierarchy. 4040 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4041 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4042 E = lhsQID->qual_end(); I != E; ++I) { 4043 // when comparing an id<P> on lhs with a static type on rhs, 4044 // see if static class implements all of id's protocols, directly or 4045 // through its super class and categories. 4046 if (rhsID->ClassImplementsProtocol(*I, true)) { 4047 match = true; 4048 break; 4049 } 4050 } 4051 } 4052 if (!match) 4053 return false; 4054 } 4055 4056 return true; 4057 } 4058 4059 const ObjCObjectPointerType *rhsQID = rhs->getAsObjCQualifiedIdType(); 4060 assert(rhsQID && "One of the LHS/RHS should be id<x>"); 4061 4062 if (const ObjCObjectPointerType *lhsOPT = 4063 lhs->getAsObjCInterfacePointerType()) { 4064 if (lhsOPT->qual_empty()) { 4065 bool match = false; 4066 if (ObjCInterfaceDecl *lhsID = lhsOPT->getInterfaceDecl()) { 4067 for (ObjCObjectPointerType::qual_iterator I = rhsQID->qual_begin(), 4068 E = rhsQID->qual_end(); I != E; ++I) { 4069 // when comparing an id<P> on lhs with a static type on rhs, 4070 // see if static class implements all of id's protocols, directly or 4071 // through its super class and categories. 4072 if (lhsID->ClassImplementsProtocol(*I, true)) { 4073 match = true; 4074 break; 4075 } 4076 } 4077 if (!match) 4078 return false; 4079 } 4080 return true; 4081 } 4082 // Both the right and left sides have qualifiers. 4083 for (ObjCObjectPointerType::qual_iterator I = lhsOPT->qual_begin(), 4084 E = lhsOPT->qual_end(); I != E; ++I) { 4085 ObjCProtocolDecl *lhsProto = *I; 4086 bool match = false; 4087 4088 // when comparing an id<P> on lhs with a static type on rhs, 4089 // see if static class implements all of id's protocols, directly or 4090 // through its super class and categories. 4091 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 4092 E = rhsQID->qual_end(); J != E; ++J) { 4093 ObjCProtocolDecl *rhsProto = *J; 4094 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4095 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4096 match = true; 4097 break; 4098 } 4099 } 4100 if (!match) 4101 return false; 4102 } 4103 return true; 4104 } 4105 return false; 4106} 4107 4108/// canAssignObjCInterfaces - Return true if the two interface types are 4109/// compatible for assignment from RHS to LHS. This handles validation of any 4110/// protocol qualifiers on the LHS or RHS. 4111/// 4112bool ASTContext::canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 4113 const ObjCObjectPointerType *RHSOPT) { 4114 // If either type represents the built-in 'id' or 'Class' types, return true. 4115 if (LHSOPT->isObjCBuiltinType() || RHSOPT->isObjCBuiltinType()) 4116 return true; 4117 4118 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 4119 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4120 QualType(RHSOPT,0), 4121 false); 4122 4123 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4124 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4125 if (LHS && RHS) // We have 2 user-defined types. 4126 return canAssignObjCInterfaces(LHS, RHS); 4127 4128 return false; 4129} 4130 4131/// canAssignObjCInterfacesInBlockPointer - This routine is specifically written 4132/// for providing type-safty for objective-c pointers used to pass/return 4133/// arguments in block literals. When passed as arguments, passing 'A*' where 4134/// 'id' is expected is not OK. Passing 'Sub *" where 'Super *" is expected is 4135/// not OK. For the return type, the opposite is not OK. 4136bool ASTContext::canAssignObjCInterfacesInBlockPointer( 4137 const ObjCObjectPointerType *LHSOPT, 4138 const ObjCObjectPointerType *RHSOPT) { 4139 if (RHSOPT->isObjCBuiltinType() || LHSOPT->isObjCIdType()) 4140 return true; 4141 4142 if (LHSOPT->isObjCBuiltinType()) { 4143 return RHSOPT->isObjCBuiltinType() || RHSOPT->isObjCQualifiedIdType(); 4144 } 4145 4146 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 4147 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4148 QualType(RHSOPT,0), 4149 false); 4150 4151 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4152 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4153 if (LHS && RHS) { // We have 2 user-defined types. 4154 if (LHS != RHS) { 4155 if (LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 4156 return false; 4157 if (RHS->getDecl()->isSuperClassOf(LHS->getDecl())) 4158 return true; 4159 } 4160 else 4161 return true; 4162 } 4163 return false; 4164} 4165 4166/// getIntersectionOfProtocols - This routine finds the intersection of set 4167/// of protocols inherited from two distinct objective-c pointer objects. 4168/// It is used to build composite qualifier list of the composite type of 4169/// the conditional expression involving two objective-c pointer objects. 4170static 4171void getIntersectionOfProtocols(ASTContext &Context, 4172 const ObjCObjectPointerType *LHSOPT, 4173 const ObjCObjectPointerType *RHSOPT, 4174 llvm::SmallVectorImpl<ObjCProtocolDecl *> &IntersectionOfProtocols) { 4175 4176 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4177 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4178 4179 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> InheritedProtocolSet; 4180 unsigned LHSNumProtocols = LHS->getNumProtocols(); 4181 if (LHSNumProtocols > 0) 4182 InheritedProtocolSet.insert(LHS->qual_begin(), LHS->qual_end()); 4183 else { 4184 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 4185 Context.CollectInheritedProtocols(LHS->getDecl(), LHSInheritedProtocols); 4186 InheritedProtocolSet.insert(LHSInheritedProtocols.begin(), 4187 LHSInheritedProtocols.end()); 4188 } 4189 4190 unsigned RHSNumProtocols = RHS->getNumProtocols(); 4191 if (RHSNumProtocols > 0) { 4192 ObjCProtocolDecl **RHSProtocols = (ObjCProtocolDecl **)RHS->qual_begin(); 4193 for (unsigned i = 0; i < RHSNumProtocols; ++i) 4194 if (InheritedProtocolSet.count(RHSProtocols[i])) 4195 IntersectionOfProtocols.push_back(RHSProtocols[i]); 4196 } 4197 else { 4198 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> RHSInheritedProtocols; 4199 Context.CollectInheritedProtocols(RHS->getDecl(), RHSInheritedProtocols); 4200 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 4201 RHSInheritedProtocols.begin(), 4202 E = RHSInheritedProtocols.end(); I != E; ++I) 4203 if (InheritedProtocolSet.count((*I))) 4204 IntersectionOfProtocols.push_back((*I)); 4205 } 4206} 4207 4208/// areCommonBaseCompatible - Returns common base class of the two classes if 4209/// one found. Note that this is O'2 algorithm. But it will be called as the 4210/// last type comparison in a ?-exp of ObjC pointer types before a 4211/// warning is issued. So, its invokation is extremely rare. 4212QualType ASTContext::areCommonBaseCompatible( 4213 const ObjCObjectPointerType *LHSOPT, 4214 const ObjCObjectPointerType *RHSOPT) { 4215 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4216 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4217 if (!LHS || !RHS) 4218 return QualType(); 4219 4220 while (const ObjCInterfaceDecl *LHSIDecl = LHS->getDecl()->getSuperClass()) { 4221 QualType LHSTy = getObjCInterfaceType(LHSIDecl); 4222 LHS = LHSTy->getAs<ObjCInterfaceType>(); 4223 if (canAssignObjCInterfaces(LHS, RHS)) { 4224 llvm::SmallVector<ObjCProtocolDecl *, 8> IntersectionOfProtocols; 4225 getIntersectionOfProtocols(*this, 4226 LHSOPT, RHSOPT, IntersectionOfProtocols); 4227 if (IntersectionOfProtocols.empty()) 4228 LHSTy = getObjCObjectPointerType(LHSTy); 4229 else 4230 LHSTy = getObjCObjectPointerType(LHSTy, &IntersectionOfProtocols[0], 4231 IntersectionOfProtocols.size()); 4232 return LHSTy; 4233 } 4234 } 4235 4236 return QualType(); 4237} 4238 4239bool ASTContext::canAssignObjCInterfaces(const ObjCInterfaceType *LHS, 4240 const ObjCInterfaceType *RHS) { 4241 // Verify that the base decls are compatible: the RHS must be a subclass of 4242 // the LHS. 4243 if (!LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 4244 return false; 4245 4246 // RHS must have a superset of the protocols in the LHS. If the LHS is not 4247 // protocol qualified at all, then we are good. 4248 if (LHS->getNumProtocols() == 0) 4249 return true; 4250 4251 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, then it 4252 // isn't a superset. 4253 if (RHS->getNumProtocols() == 0) 4254 return true; // FIXME: should return false! 4255 4256 for (ObjCInterfaceType::qual_iterator LHSPI = LHS->qual_begin(), 4257 LHSPE = LHS->qual_end(); 4258 LHSPI != LHSPE; LHSPI++) { 4259 bool RHSImplementsProtocol = false; 4260 4261 // If the RHS doesn't implement the protocol on the left, the types 4262 // are incompatible. 4263 for (ObjCInterfaceType::qual_iterator RHSPI = RHS->qual_begin(), 4264 RHSPE = RHS->qual_end(); 4265 RHSPI != RHSPE; RHSPI++) { 4266 if ((*RHSPI)->lookupProtocolNamed((*LHSPI)->getIdentifier())) { 4267 RHSImplementsProtocol = true; 4268 break; 4269 } 4270 } 4271 // FIXME: For better diagnostics, consider passing back the protocol name. 4272 if (!RHSImplementsProtocol) 4273 return false; 4274 } 4275 // The RHS implements all protocols listed on the LHS. 4276 return true; 4277} 4278 4279bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) { 4280 // get the "pointed to" types 4281 const ObjCObjectPointerType *LHSOPT = LHS->getAs<ObjCObjectPointerType>(); 4282 const ObjCObjectPointerType *RHSOPT = RHS->getAs<ObjCObjectPointerType>(); 4283 4284 if (!LHSOPT || !RHSOPT) 4285 return false; 4286 4287 return canAssignObjCInterfaces(LHSOPT, RHSOPT) || 4288 canAssignObjCInterfaces(RHSOPT, LHSOPT); 4289} 4290 4291/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible, 4292/// both shall have the identically qualified version of a compatible type. 4293/// C99 6.2.7p1: Two types have compatible types if their types are the 4294/// same. See 6.7.[2,3,5] for additional rules. 4295bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS) { 4296 if (getLangOptions().CPlusPlus) 4297 return hasSameType(LHS, RHS); 4298 4299 return !mergeTypes(LHS, RHS).isNull(); 4300} 4301 4302bool ASTContext::typesAreBlockPointerCompatible(QualType LHS, QualType RHS) { 4303 return !mergeTypes(LHS, RHS, true).isNull(); 4304} 4305 4306QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs, 4307 bool OfBlockPointer) { 4308 const FunctionType *lbase = lhs->getAs<FunctionType>(); 4309 const FunctionType *rbase = rhs->getAs<FunctionType>(); 4310 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 4311 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 4312 bool allLTypes = true; 4313 bool allRTypes = true; 4314 4315 // Check return type 4316 QualType retType; 4317 if (OfBlockPointer) 4318 retType = mergeTypes(rbase->getResultType(), lbase->getResultType(), true); 4319 else 4320 retType = mergeTypes(lbase->getResultType(), rbase->getResultType()); 4321 if (retType.isNull()) return QualType(); 4322 if (getCanonicalType(retType) != getCanonicalType(lbase->getResultType())) 4323 allLTypes = false; 4324 if (getCanonicalType(retType) != getCanonicalType(rbase->getResultType())) 4325 allRTypes = false; 4326 // FIXME: double check this 4327 // FIXME: should we error if lbase->getRegParmAttr() != 0 && 4328 // rbase->getRegParmAttr() != 0 && 4329 // lbase->getRegParmAttr() != rbase->getRegParmAttr()? 4330 FunctionType::ExtInfo lbaseInfo = lbase->getExtInfo(); 4331 FunctionType::ExtInfo rbaseInfo = rbase->getExtInfo(); 4332 unsigned RegParm = lbaseInfo.getRegParm() == 0 ? rbaseInfo.getRegParm() : 4333 lbaseInfo.getRegParm(); 4334 bool NoReturn = lbaseInfo.getNoReturn() || rbaseInfo.getNoReturn(); 4335 if (NoReturn != lbaseInfo.getNoReturn() || 4336 RegParm != lbaseInfo.getRegParm()) 4337 allLTypes = false; 4338 if (NoReturn != rbaseInfo.getNoReturn() || 4339 RegParm != rbaseInfo.getRegParm()) 4340 allRTypes = false; 4341 CallingConv lcc = lbaseInfo.getCC(); 4342 CallingConv rcc = rbaseInfo.getCC(); 4343 // Compatible functions must have compatible calling conventions 4344 if (!isSameCallConv(lcc, rcc)) 4345 return QualType(); 4346 4347 if (lproto && rproto) { // two C99 style function prototypes 4348 assert(!lproto->hasExceptionSpec() && !rproto->hasExceptionSpec() && 4349 "C++ shouldn't be here"); 4350 unsigned lproto_nargs = lproto->getNumArgs(); 4351 unsigned rproto_nargs = rproto->getNumArgs(); 4352 4353 // Compatible functions must have the same number of arguments 4354 if (lproto_nargs != rproto_nargs) 4355 return QualType(); 4356 4357 // Variadic and non-variadic functions aren't compatible 4358 if (lproto->isVariadic() != rproto->isVariadic()) 4359 return QualType(); 4360 4361 if (lproto->getTypeQuals() != rproto->getTypeQuals()) 4362 return QualType(); 4363 4364 // Check argument compatibility 4365 llvm::SmallVector<QualType, 10> types; 4366 for (unsigned i = 0; i < lproto_nargs; i++) { 4367 QualType largtype = lproto->getArgType(i).getUnqualifiedType(); 4368 QualType rargtype = rproto->getArgType(i).getUnqualifiedType(); 4369 QualType argtype = mergeTypes(largtype, rargtype, OfBlockPointer); 4370 if (argtype.isNull()) return QualType(); 4371 types.push_back(argtype); 4372 if (getCanonicalType(argtype) != getCanonicalType(largtype)) 4373 allLTypes = false; 4374 if (getCanonicalType(argtype) != getCanonicalType(rargtype)) 4375 allRTypes = false; 4376 } 4377 if (allLTypes) return lhs; 4378 if (allRTypes) return rhs; 4379 return getFunctionType(retType, types.begin(), types.size(), 4380 lproto->isVariadic(), lproto->getTypeQuals(), 4381 false, false, 0, 0, 4382 FunctionType::ExtInfo(NoReturn, RegParm, lcc)); 4383 } 4384 4385 if (lproto) allRTypes = false; 4386 if (rproto) allLTypes = false; 4387 4388 const FunctionProtoType *proto = lproto ? lproto : rproto; 4389 if (proto) { 4390 assert(!proto->hasExceptionSpec() && "C++ shouldn't be here"); 4391 if (proto->isVariadic()) return QualType(); 4392 // Check that the types are compatible with the types that 4393 // would result from default argument promotions (C99 6.7.5.3p15). 4394 // The only types actually affected are promotable integer 4395 // types and floats, which would be passed as a different 4396 // type depending on whether the prototype is visible. 4397 unsigned proto_nargs = proto->getNumArgs(); 4398 for (unsigned i = 0; i < proto_nargs; ++i) { 4399 QualType argTy = proto->getArgType(i); 4400 4401 // Look at the promotion type of enum types, since that is the type used 4402 // to pass enum values. 4403 if (const EnumType *Enum = argTy->getAs<EnumType>()) 4404 argTy = Enum->getDecl()->getPromotionType(); 4405 4406 if (argTy->isPromotableIntegerType() || 4407 getCanonicalType(argTy).getUnqualifiedType() == FloatTy) 4408 return QualType(); 4409 } 4410 4411 if (allLTypes) return lhs; 4412 if (allRTypes) return rhs; 4413 return getFunctionType(retType, proto->arg_type_begin(), 4414 proto->getNumArgs(), proto->isVariadic(), 4415 proto->getTypeQuals(), 4416 false, false, 0, 0, 4417 FunctionType::ExtInfo(NoReturn, RegParm, lcc)); 4418 } 4419 4420 if (allLTypes) return lhs; 4421 if (allRTypes) return rhs; 4422 FunctionType::ExtInfo Info(NoReturn, RegParm, lcc); 4423 return getFunctionNoProtoType(retType, Info); 4424} 4425 4426QualType ASTContext::mergeTypes(QualType LHS, QualType RHS, 4427 bool OfBlockPointer) { 4428 // C++ [expr]: If an expression initially has the type "reference to T", the 4429 // type is adjusted to "T" prior to any further analysis, the expression 4430 // designates the object or function denoted by the reference, and the 4431 // expression is an lvalue unless the reference is an rvalue reference and 4432 // the expression is a function call (possibly inside parentheses). 4433 assert(!LHS->getAs<ReferenceType>() && "LHS is a reference type?"); 4434 assert(!RHS->getAs<ReferenceType>() && "RHS is a reference type?"); 4435 4436 QualType LHSCan = getCanonicalType(LHS), 4437 RHSCan = getCanonicalType(RHS); 4438 4439 // If two types are identical, they are compatible. 4440 if (LHSCan == RHSCan) 4441 return LHS; 4442 4443 // If the qualifiers are different, the types aren't compatible... mostly. 4444 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 4445 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 4446 if (LQuals != RQuals) { 4447 // If any of these qualifiers are different, we have a type 4448 // mismatch. 4449 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 4450 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 4451 return QualType(); 4452 4453 // Exactly one GC qualifier difference is allowed: __strong is 4454 // okay if the other type has no GC qualifier but is an Objective 4455 // C object pointer (i.e. implicitly strong by default). We fix 4456 // this by pretending that the unqualified type was actually 4457 // qualified __strong. 4458 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 4459 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 4460 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 4461 4462 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 4463 return QualType(); 4464 4465 if (GC_L == Qualifiers::Strong && RHSCan->isObjCObjectPointerType()) { 4466 return mergeTypes(LHS, getObjCGCQualType(RHS, Qualifiers::Strong)); 4467 } 4468 if (GC_R == Qualifiers::Strong && LHSCan->isObjCObjectPointerType()) { 4469 return mergeTypes(getObjCGCQualType(LHS, Qualifiers::Strong), RHS); 4470 } 4471 return QualType(); 4472 } 4473 4474 // Okay, qualifiers are equal. 4475 4476 Type::TypeClass LHSClass = LHSCan->getTypeClass(); 4477 Type::TypeClass RHSClass = RHSCan->getTypeClass(); 4478 4479 // We want to consider the two function types to be the same for these 4480 // comparisons, just force one to the other. 4481 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto; 4482 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto; 4483 4484 // Same as above for arrays 4485 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray) 4486 LHSClass = Type::ConstantArray; 4487 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray) 4488 RHSClass = Type::ConstantArray; 4489 4490 // Canonicalize ExtVector -> Vector. 4491 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector; 4492 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector; 4493 4494 // If the canonical type classes don't match. 4495 if (LHSClass != RHSClass) { 4496 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char, 4497 // a signed integer type, or an unsigned integer type. 4498 // Compatibility is based on the underlying type, not the promotion 4499 // type. 4500 if (const EnumType* ETy = LHS->getAs<EnumType>()) { 4501 if (ETy->getDecl()->getIntegerType() == RHSCan.getUnqualifiedType()) 4502 return RHS; 4503 } 4504 if (const EnumType* ETy = RHS->getAs<EnumType>()) { 4505 if (ETy->getDecl()->getIntegerType() == LHSCan.getUnqualifiedType()) 4506 return LHS; 4507 } 4508 4509 return QualType(); 4510 } 4511 4512 // The canonical type classes match. 4513 switch (LHSClass) { 4514#define TYPE(Class, Base) 4515#define ABSTRACT_TYPE(Class, Base) 4516#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) case Type::Class: 4517#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 4518#define DEPENDENT_TYPE(Class, Base) case Type::Class: 4519#include "clang/AST/TypeNodes.def" 4520 assert(false && "Non-canonical and dependent types shouldn't get here"); 4521 return QualType(); 4522 4523 case Type::LValueReference: 4524 case Type::RValueReference: 4525 case Type::MemberPointer: 4526 assert(false && "C++ should never be in mergeTypes"); 4527 return QualType(); 4528 4529 case Type::IncompleteArray: 4530 case Type::VariableArray: 4531 case Type::FunctionProto: 4532 case Type::ExtVector: 4533 assert(false && "Types are eliminated above"); 4534 return QualType(); 4535 4536 case Type::Pointer: 4537 { 4538 // Merge two pointer types, while trying to preserve typedef info 4539 QualType LHSPointee = LHS->getAs<PointerType>()->getPointeeType(); 4540 QualType RHSPointee = RHS->getAs<PointerType>()->getPointeeType(); 4541 QualType ResultType = mergeTypes(LHSPointee, RHSPointee); 4542 if (ResultType.isNull()) return QualType(); 4543 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 4544 return LHS; 4545 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 4546 return RHS; 4547 return getPointerType(ResultType); 4548 } 4549 case Type::BlockPointer: 4550 { 4551 // Merge two block pointer types, while trying to preserve typedef info 4552 QualType LHSPointee = LHS->getAs<BlockPointerType>()->getPointeeType(); 4553 QualType RHSPointee = RHS->getAs<BlockPointerType>()->getPointeeType(); 4554 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, OfBlockPointer); 4555 if (ResultType.isNull()) return QualType(); 4556 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 4557 return LHS; 4558 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 4559 return RHS; 4560 return getBlockPointerType(ResultType); 4561 } 4562 case Type::ConstantArray: 4563 { 4564 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS); 4565 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS); 4566 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize()) 4567 return QualType(); 4568 4569 QualType LHSElem = getAsArrayType(LHS)->getElementType(); 4570 QualType RHSElem = getAsArrayType(RHS)->getElementType(); 4571 QualType ResultType = mergeTypes(LHSElem, RHSElem); 4572 if (ResultType.isNull()) return QualType(); 4573 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 4574 return LHS; 4575 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 4576 return RHS; 4577 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(), 4578 ArrayType::ArraySizeModifier(), 0); 4579 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(), 4580 ArrayType::ArraySizeModifier(), 0); 4581 const VariableArrayType* LVAT = getAsVariableArrayType(LHS); 4582 const VariableArrayType* RVAT = getAsVariableArrayType(RHS); 4583 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 4584 return LHS; 4585 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 4586 return RHS; 4587 if (LVAT) { 4588 // FIXME: This isn't correct! But tricky to implement because 4589 // the array's size has to be the size of LHS, but the type 4590 // has to be different. 4591 return LHS; 4592 } 4593 if (RVAT) { 4594 // FIXME: This isn't correct! But tricky to implement because 4595 // the array's size has to be the size of RHS, but the type 4596 // has to be different. 4597 return RHS; 4598 } 4599 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS; 4600 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS; 4601 return getIncompleteArrayType(ResultType, 4602 ArrayType::ArraySizeModifier(), 0); 4603 } 4604 case Type::FunctionNoProto: 4605 return mergeFunctionTypes(LHS, RHS, OfBlockPointer); 4606 case Type::Record: 4607 case Type::Enum: 4608 return QualType(); 4609 case Type::Builtin: 4610 // Only exactly equal builtin types are compatible, which is tested above. 4611 return QualType(); 4612 case Type::Complex: 4613 // Distinct complex types are incompatible. 4614 return QualType(); 4615 case Type::Vector: 4616 // FIXME: The merged type should be an ExtVector! 4617 if (areCompatVectorTypes(LHSCan->getAs<VectorType>(), 4618 RHSCan->getAs<VectorType>())) 4619 return LHS; 4620 return QualType(); 4621 case Type::ObjCInterface: { 4622 // Check if the interfaces are assignment compatible. 4623 // FIXME: This should be type compatibility, e.g. whether 4624 // "LHS x; RHS x;" at global scope is legal. 4625 const ObjCInterfaceType* LHSIface = LHS->getAs<ObjCInterfaceType>(); 4626 const ObjCInterfaceType* RHSIface = RHS->getAs<ObjCInterfaceType>(); 4627 if (LHSIface && RHSIface && 4628 canAssignObjCInterfaces(LHSIface, RHSIface)) 4629 return LHS; 4630 4631 return QualType(); 4632 } 4633 case Type::ObjCObjectPointer: { 4634 if (OfBlockPointer) { 4635 if (canAssignObjCInterfacesInBlockPointer( 4636 LHS->getAs<ObjCObjectPointerType>(), 4637 RHS->getAs<ObjCObjectPointerType>())) 4638 return LHS; 4639 return QualType(); 4640 } 4641 if (canAssignObjCInterfaces(LHS->getAs<ObjCObjectPointerType>(), 4642 RHS->getAs<ObjCObjectPointerType>())) 4643 return LHS; 4644 4645 return QualType(); 4646 } 4647 } 4648 4649 return QualType(); 4650} 4651 4652//===----------------------------------------------------------------------===// 4653// Integer Predicates 4654//===----------------------------------------------------------------------===// 4655 4656unsigned ASTContext::getIntWidth(QualType T) { 4657 if (T->isBooleanType()) 4658 return 1; 4659 if (EnumType *ET = dyn_cast<EnumType>(T)) 4660 T = ET->getDecl()->getIntegerType(); 4661 // For builtin types, just use the standard type sizing method 4662 return (unsigned)getTypeSize(T); 4663} 4664 4665QualType ASTContext::getCorrespondingUnsignedType(QualType T) { 4666 assert(T->isSignedIntegerType() && "Unexpected type"); 4667 4668 // Turn <4 x signed int> -> <4 x unsigned int> 4669 if (const VectorType *VTy = T->getAs<VectorType>()) 4670 return getVectorType(getCorrespondingUnsignedType(VTy->getElementType()), 4671 VTy->getNumElements(), VTy->isAltiVec(), VTy->isPixel()); 4672 4673 // For enums, we return the unsigned version of the base type. 4674 if (const EnumType *ETy = T->getAs<EnumType>()) 4675 T = ETy->getDecl()->getIntegerType(); 4676 4677 const BuiltinType *BTy = T->getAs<BuiltinType>(); 4678 assert(BTy && "Unexpected signed integer type"); 4679 switch (BTy->getKind()) { 4680 case BuiltinType::Char_S: 4681 case BuiltinType::SChar: 4682 return UnsignedCharTy; 4683 case BuiltinType::Short: 4684 return UnsignedShortTy; 4685 case BuiltinType::Int: 4686 return UnsignedIntTy; 4687 case BuiltinType::Long: 4688 return UnsignedLongTy; 4689 case BuiltinType::LongLong: 4690 return UnsignedLongLongTy; 4691 case BuiltinType::Int128: 4692 return UnsignedInt128Ty; 4693 default: 4694 assert(0 && "Unexpected signed integer type"); 4695 return QualType(); 4696 } 4697} 4698 4699ExternalASTSource::~ExternalASTSource() { } 4700 4701void ExternalASTSource::PrintStats() { } 4702 4703 4704//===----------------------------------------------------------------------===// 4705// Builtin Type Computation 4706//===----------------------------------------------------------------------===// 4707 4708/// DecodeTypeFromStr - This decodes one type descriptor from Str, advancing the 4709/// pointer over the consumed characters. This returns the resultant type. 4710static QualType DecodeTypeFromStr(const char *&Str, ASTContext &Context, 4711 ASTContext::GetBuiltinTypeError &Error, 4712 bool AllowTypeModifiers = true) { 4713 // Modifiers. 4714 int HowLong = 0; 4715 bool Signed = false, Unsigned = false; 4716 4717 // Read the modifiers first. 4718 bool Done = false; 4719 while (!Done) { 4720 switch (*Str++) { 4721 default: Done = true; --Str; break; 4722 case 'S': 4723 assert(!Unsigned && "Can't use both 'S' and 'U' modifiers!"); 4724 assert(!Signed && "Can't use 'S' modifier multiple times!"); 4725 Signed = true; 4726 break; 4727 case 'U': 4728 assert(!Signed && "Can't use both 'S' and 'U' modifiers!"); 4729 assert(!Unsigned && "Can't use 'S' modifier multiple times!"); 4730 Unsigned = true; 4731 break; 4732 case 'L': 4733 assert(HowLong <= 2 && "Can't have LLLL modifier"); 4734 ++HowLong; 4735 break; 4736 } 4737 } 4738 4739 QualType Type; 4740 4741 // Read the base type. 4742 switch (*Str++) { 4743 default: assert(0 && "Unknown builtin type letter!"); 4744 case 'v': 4745 assert(HowLong == 0 && !Signed && !Unsigned && 4746 "Bad modifiers used with 'v'!"); 4747 Type = Context.VoidTy; 4748 break; 4749 case 'f': 4750 assert(HowLong == 0 && !Signed && !Unsigned && 4751 "Bad modifiers used with 'f'!"); 4752 Type = Context.FloatTy; 4753 break; 4754 case 'd': 4755 assert(HowLong < 2 && !Signed && !Unsigned && 4756 "Bad modifiers used with 'd'!"); 4757 if (HowLong) 4758 Type = Context.LongDoubleTy; 4759 else 4760 Type = Context.DoubleTy; 4761 break; 4762 case 's': 4763 assert(HowLong == 0 && "Bad modifiers used with 's'!"); 4764 if (Unsigned) 4765 Type = Context.UnsignedShortTy; 4766 else 4767 Type = Context.ShortTy; 4768 break; 4769 case 'i': 4770 if (HowLong == 3) 4771 Type = Unsigned ? Context.UnsignedInt128Ty : Context.Int128Ty; 4772 else if (HowLong == 2) 4773 Type = Unsigned ? Context.UnsignedLongLongTy : Context.LongLongTy; 4774 else if (HowLong == 1) 4775 Type = Unsigned ? Context.UnsignedLongTy : Context.LongTy; 4776 else 4777 Type = Unsigned ? Context.UnsignedIntTy : Context.IntTy; 4778 break; 4779 case 'c': 4780 assert(HowLong == 0 && "Bad modifiers used with 'c'!"); 4781 if (Signed) 4782 Type = Context.SignedCharTy; 4783 else if (Unsigned) 4784 Type = Context.UnsignedCharTy; 4785 else 4786 Type = Context.CharTy; 4787 break; 4788 case 'b': // boolean 4789 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'b'!"); 4790 Type = Context.BoolTy; 4791 break; 4792 case 'z': // size_t. 4793 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'z'!"); 4794 Type = Context.getSizeType(); 4795 break; 4796 case 'F': 4797 Type = Context.getCFConstantStringType(); 4798 break; 4799 case 'a': 4800 Type = Context.getBuiltinVaListType(); 4801 assert(!Type.isNull() && "builtin va list type not initialized!"); 4802 break; 4803 case 'A': 4804 // This is a "reference" to a va_list; however, what exactly 4805 // this means depends on how va_list is defined. There are two 4806 // different kinds of va_list: ones passed by value, and ones 4807 // passed by reference. An example of a by-value va_list is 4808 // x86, where va_list is a char*. An example of by-ref va_list 4809 // is x86-64, where va_list is a __va_list_tag[1]. For x86, 4810 // we want this argument to be a char*&; for x86-64, we want 4811 // it to be a __va_list_tag*. 4812 Type = Context.getBuiltinVaListType(); 4813 assert(!Type.isNull() && "builtin va list type not initialized!"); 4814 if (Type->isArrayType()) { 4815 Type = Context.getArrayDecayedType(Type); 4816 } else { 4817 Type = Context.getLValueReferenceType(Type); 4818 } 4819 break; 4820 case 'V': { 4821 char *End; 4822 unsigned NumElements = strtoul(Str, &End, 10); 4823 assert(End != Str && "Missing vector size"); 4824 4825 Str = End; 4826 4827 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 4828 // FIXME: Don't know what to do about AltiVec. 4829 Type = Context.getVectorType(ElementType, NumElements, false, false); 4830 break; 4831 } 4832 case 'X': { 4833 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 4834 Type = Context.getComplexType(ElementType); 4835 break; 4836 } 4837 case 'P': 4838 Type = Context.getFILEType(); 4839 if (Type.isNull()) { 4840 Error = ASTContext::GE_Missing_stdio; 4841 return QualType(); 4842 } 4843 break; 4844 case 'J': 4845 if (Signed) 4846 Type = Context.getsigjmp_bufType(); 4847 else 4848 Type = Context.getjmp_bufType(); 4849 4850 if (Type.isNull()) { 4851 Error = ASTContext::GE_Missing_setjmp; 4852 return QualType(); 4853 } 4854 break; 4855 } 4856 4857 if (!AllowTypeModifiers) 4858 return Type; 4859 4860 Done = false; 4861 while (!Done) { 4862 switch (char c = *Str++) { 4863 default: Done = true; --Str; break; 4864 case '*': 4865 case '&': 4866 { 4867 // Both pointers and references can have their pointee types 4868 // qualified with an address space. 4869 char *End; 4870 unsigned AddrSpace = strtoul(Str, &End, 10); 4871 if (End != Str && AddrSpace != 0) { 4872 Type = Context.getAddrSpaceQualType(Type, AddrSpace); 4873 Str = End; 4874 } 4875 } 4876 if (c == '*') 4877 Type = Context.getPointerType(Type); 4878 else 4879 Type = Context.getLValueReferenceType(Type); 4880 break; 4881 // FIXME: There's no way to have a built-in with an rvalue ref arg. 4882 case 'C': 4883 Type = Type.withConst(); 4884 break; 4885 case 'D': 4886 Type = Context.getVolatileType(Type); 4887 break; 4888 } 4889 } 4890 4891 return Type; 4892} 4893 4894/// GetBuiltinType - Return the type for the specified builtin. 4895QualType ASTContext::GetBuiltinType(unsigned id, 4896 GetBuiltinTypeError &Error) { 4897 const char *TypeStr = BuiltinInfo.GetTypeString(id); 4898 4899 llvm::SmallVector<QualType, 8> ArgTypes; 4900 4901 Error = GE_None; 4902 QualType ResType = DecodeTypeFromStr(TypeStr, *this, Error); 4903 if (Error != GE_None) 4904 return QualType(); 4905 while (TypeStr[0] && TypeStr[0] != '.') { 4906 QualType Ty = DecodeTypeFromStr(TypeStr, *this, Error); 4907 if (Error != GE_None) 4908 return QualType(); 4909 4910 // Do array -> pointer decay. The builtin should use the decayed type. 4911 if (Ty->isArrayType()) 4912 Ty = getArrayDecayedType(Ty); 4913 4914 ArgTypes.push_back(Ty); 4915 } 4916 4917 assert((TypeStr[0] != '.' || TypeStr[1] == 0) && 4918 "'.' should only occur at end of builtin type list!"); 4919 4920 // handle untyped/variadic arguments "T c99Style();" or "T cppStyle(...);". 4921 if (ArgTypes.size() == 0 && TypeStr[0] == '.') 4922 return getFunctionNoProtoType(ResType); 4923 4924 // FIXME: Should we create noreturn types? 4925 return getFunctionType(ResType, ArgTypes.data(), ArgTypes.size(), 4926 TypeStr[0] == '.', 0, false, false, 0, 0, 4927 FunctionType::ExtInfo()); 4928} 4929 4930QualType 4931ASTContext::UsualArithmeticConversionsType(QualType lhs, QualType rhs) { 4932 // Perform the usual unary conversions. We do this early so that 4933 // integral promotions to "int" can allow us to exit early, in the 4934 // lhs == rhs check. Also, for conversion purposes, we ignore any 4935 // qualifiers. For example, "const float" and "float" are 4936 // equivalent. 4937 if (lhs->isPromotableIntegerType()) 4938 lhs = getPromotedIntegerType(lhs); 4939 else 4940 lhs = lhs.getUnqualifiedType(); 4941 if (rhs->isPromotableIntegerType()) 4942 rhs = getPromotedIntegerType(rhs); 4943 else 4944 rhs = rhs.getUnqualifiedType(); 4945 4946 // If both types are identical, no conversion is needed. 4947 if (lhs == rhs) 4948 return lhs; 4949 4950 // If either side is a non-arithmetic type (e.g. a pointer), we are done. 4951 // The caller can deal with this (e.g. pointer + int). 4952 if (!lhs->isArithmeticType() || !rhs->isArithmeticType()) 4953 return lhs; 4954 4955 // At this point, we have two different arithmetic types. 4956 4957 // Handle complex types first (C99 6.3.1.8p1). 4958 if (lhs->isComplexType() || rhs->isComplexType()) { 4959 // if we have an integer operand, the result is the complex type. 4960 if (rhs->isIntegerType() || rhs->isComplexIntegerType()) { 4961 // convert the rhs to the lhs complex type. 4962 return lhs; 4963 } 4964 if (lhs->isIntegerType() || lhs->isComplexIntegerType()) { 4965 // convert the lhs to the rhs complex type. 4966 return rhs; 4967 } 4968 // This handles complex/complex, complex/float, or float/complex. 4969 // When both operands are complex, the shorter operand is converted to the 4970 // type of the longer, and that is the type of the result. This corresponds 4971 // to what is done when combining two real floating-point operands. 4972 // The fun begins when size promotion occur across type domains. 4973 // From H&S 6.3.4: When one operand is complex and the other is a real 4974 // floating-point type, the less precise type is converted, within it's 4975 // real or complex domain, to the precision of the other type. For example, 4976 // when combining a "long double" with a "double _Complex", the 4977 // "double _Complex" is promoted to "long double _Complex". 4978 int result = getFloatingTypeOrder(lhs, rhs); 4979 4980 if (result > 0) { // The left side is bigger, convert rhs. 4981 rhs = getFloatingTypeOfSizeWithinDomain(lhs, rhs); 4982 } else if (result < 0) { // The right side is bigger, convert lhs. 4983 lhs = getFloatingTypeOfSizeWithinDomain(rhs, lhs); 4984 } 4985 // At this point, lhs and rhs have the same rank/size. Now, make sure the 4986 // domains match. This is a requirement for our implementation, C99 4987 // does not require this promotion. 4988 if (lhs != rhs) { // Domains don't match, we have complex/float mix. 4989 if (lhs->isRealFloatingType()) { // handle "double, _Complex double". 4990 return rhs; 4991 } else { // handle "_Complex double, double". 4992 return lhs; 4993 } 4994 } 4995 return lhs; // The domain/size match exactly. 4996 } 4997 // Now handle "real" floating types (i.e. float, double, long double). 4998 if (lhs->isRealFloatingType() || rhs->isRealFloatingType()) { 4999 // if we have an integer operand, the result is the real floating type. 5000 if (rhs->isIntegerType()) { 5001 // convert rhs to the lhs floating point type. 5002 return lhs; 5003 } 5004 if (rhs->isComplexIntegerType()) { 5005 // convert rhs to the complex floating point type. 5006 return getComplexType(lhs); 5007 } 5008 if (lhs->isIntegerType()) { 5009 // convert lhs to the rhs floating point type. 5010 return rhs; 5011 } 5012 if (lhs->isComplexIntegerType()) { 5013 // convert lhs to the complex floating point type. 5014 return getComplexType(rhs); 5015 } 5016 // We have two real floating types, float/complex combos were handled above. 5017 // Convert the smaller operand to the bigger result. 5018 int result = getFloatingTypeOrder(lhs, rhs); 5019 if (result > 0) // convert the rhs 5020 return lhs; 5021 assert(result < 0 && "illegal float comparison"); 5022 return rhs; // convert the lhs 5023 } 5024 if (lhs->isComplexIntegerType() || rhs->isComplexIntegerType()) { 5025 // Handle GCC complex int extension. 5026 const ComplexType *lhsComplexInt = lhs->getAsComplexIntegerType(); 5027 const ComplexType *rhsComplexInt = rhs->getAsComplexIntegerType(); 5028 5029 if (lhsComplexInt && rhsComplexInt) { 5030 if (getIntegerTypeOrder(lhsComplexInt->getElementType(), 5031 rhsComplexInt->getElementType()) >= 0) 5032 return lhs; // convert the rhs 5033 return rhs; 5034 } else if (lhsComplexInt && rhs->isIntegerType()) { 5035 // convert the rhs to the lhs complex type. 5036 return lhs; 5037 } else if (rhsComplexInt && lhs->isIntegerType()) { 5038 // convert the lhs to the rhs complex type. 5039 return rhs; 5040 } 5041 } 5042 // Finally, we have two differing integer types. 5043 // The rules for this case are in C99 6.3.1.8 5044 int compare = getIntegerTypeOrder(lhs, rhs); 5045 bool lhsSigned = lhs->isSignedIntegerType(), 5046 rhsSigned = rhs->isSignedIntegerType(); 5047 QualType destType; 5048 if (lhsSigned == rhsSigned) { 5049 // Same signedness; use the higher-ranked type 5050 destType = compare >= 0 ? lhs : rhs; 5051 } else if (compare != (lhsSigned ? 1 : -1)) { 5052 // The unsigned type has greater than or equal rank to the 5053 // signed type, so use the unsigned type 5054 destType = lhsSigned ? rhs : lhs; 5055 } else if (getIntWidth(lhs) != getIntWidth(rhs)) { 5056 // The two types are different widths; if we are here, that 5057 // means the signed type is larger than the unsigned type, so 5058 // use the signed type. 5059 destType = lhsSigned ? lhs : rhs; 5060 } else { 5061 // The signed type is higher-ranked than the unsigned type, 5062 // but isn't actually any bigger (like unsigned int and long 5063 // on most 32-bit systems). Use the unsigned type corresponding 5064 // to the signed type. 5065 destType = getCorrespondingUnsignedType(lhsSigned ? lhs : rhs); 5066 } 5067 return destType; 5068} 5069