ASTContext.cpp revision 3e1274f2b99cb99c03cc8e2c6517c37d330b597a
1//===--- ASTContext.cpp - Context to hold long-lived AST nodes ------------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file implements the ASTContext interface. 11// 12//===----------------------------------------------------------------------===// 13 14#include "clang/AST/ASTContext.h" 15#include "clang/AST/CharUnits.h" 16#include "clang/AST/DeclCXX.h" 17#include "clang/AST/DeclObjC.h" 18#include "clang/AST/DeclTemplate.h" 19#include "clang/AST/TypeLoc.h" 20#include "clang/AST/Expr.h" 21#include "clang/AST/ExprCXX.h" 22#include "clang/AST/ExternalASTSource.h" 23#include "clang/AST/RecordLayout.h" 24#include "clang/Basic/Builtins.h" 25#include "clang/Basic/SourceManager.h" 26#include "clang/Basic/TargetInfo.h" 27#include "llvm/ADT/SmallString.h" 28#include "llvm/ADT/StringExtras.h" 29#include "llvm/Support/MathExtras.h" 30#include "llvm/Support/raw_ostream.h" 31 32using namespace clang; 33 34enum FloatingRank { 35 FloatRank, DoubleRank, LongDoubleRank 36}; 37 38void 39ASTContext::CanonicalTemplateTemplateParm::Profile(llvm::FoldingSetNodeID &ID, 40 TemplateTemplateParmDecl *Parm) { 41 ID.AddInteger(Parm->getDepth()); 42 ID.AddInteger(Parm->getPosition()); 43 // FIXME: Parameter pack 44 45 TemplateParameterList *Params = Parm->getTemplateParameters(); 46 ID.AddInteger(Params->size()); 47 for (TemplateParameterList::const_iterator P = Params->begin(), 48 PEnd = Params->end(); 49 P != PEnd; ++P) { 50 if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*P)) { 51 ID.AddInteger(0); 52 ID.AddBoolean(TTP->isParameterPack()); 53 continue; 54 } 55 56 if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(*P)) { 57 ID.AddInteger(1); 58 // FIXME: Parameter pack 59 ID.AddPointer(NTTP->getType().getAsOpaquePtr()); 60 continue; 61 } 62 63 TemplateTemplateParmDecl *TTP = cast<TemplateTemplateParmDecl>(*P); 64 ID.AddInteger(2); 65 Profile(ID, TTP); 66 } 67} 68 69TemplateTemplateParmDecl * 70ASTContext::getCanonicalTemplateTemplateParmDecl( 71 TemplateTemplateParmDecl *TTP) { 72 // Check if we already have a canonical template template parameter. 73 llvm::FoldingSetNodeID ID; 74 CanonicalTemplateTemplateParm::Profile(ID, TTP); 75 void *InsertPos = 0; 76 CanonicalTemplateTemplateParm *Canonical 77 = CanonTemplateTemplateParms.FindNodeOrInsertPos(ID, InsertPos); 78 if (Canonical) 79 return Canonical->getParam(); 80 81 // Build a canonical template parameter list. 82 TemplateParameterList *Params = TTP->getTemplateParameters(); 83 llvm::SmallVector<NamedDecl *, 4> CanonParams; 84 CanonParams.reserve(Params->size()); 85 for (TemplateParameterList::const_iterator P = Params->begin(), 86 PEnd = Params->end(); 87 P != PEnd; ++P) { 88 if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*P)) 89 CanonParams.push_back( 90 TemplateTypeParmDecl::Create(*this, getTranslationUnitDecl(), 91 SourceLocation(), TTP->getDepth(), 92 TTP->getIndex(), 0, false, 93 TTP->isParameterPack())); 94 else if (NonTypeTemplateParmDecl *NTTP 95 = dyn_cast<NonTypeTemplateParmDecl>(*P)) 96 CanonParams.push_back( 97 NonTypeTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 98 SourceLocation(), NTTP->getDepth(), 99 NTTP->getPosition(), 0, 100 getCanonicalType(NTTP->getType()), 101 0)); 102 else 103 CanonParams.push_back(getCanonicalTemplateTemplateParmDecl( 104 cast<TemplateTemplateParmDecl>(*P))); 105 } 106 107 TemplateTemplateParmDecl *CanonTTP 108 = TemplateTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 109 SourceLocation(), TTP->getDepth(), 110 TTP->getPosition(), 0, 111 TemplateParameterList::Create(*this, SourceLocation(), 112 SourceLocation(), 113 CanonParams.data(), 114 CanonParams.size(), 115 SourceLocation())); 116 117 // Get the new insert position for the node we care about. 118 Canonical = CanonTemplateTemplateParms.FindNodeOrInsertPos(ID, InsertPos); 119 assert(Canonical == 0 && "Shouldn't be in the map!"); 120 (void)Canonical; 121 122 // Create the canonical template template parameter entry. 123 Canonical = new (*this) CanonicalTemplateTemplateParm(CanonTTP); 124 CanonTemplateTemplateParms.InsertNode(Canonical, InsertPos); 125 return CanonTTP; 126} 127 128ASTContext::ASTContext(const LangOptions& LOpts, SourceManager &SM, 129 const TargetInfo &t, 130 IdentifierTable &idents, SelectorTable &sels, 131 Builtin::Context &builtins, 132 bool FreeMem, unsigned size_reserve) : 133 TemplateSpecializationTypes(this_()), 134 DependentTemplateSpecializationTypes(this_()), 135 GlobalNestedNameSpecifier(0), CFConstantStringTypeDecl(0), 136 NSConstantStringTypeDecl(0), 137 ObjCFastEnumerationStateTypeDecl(0), FILEDecl(0), jmp_bufDecl(0), 138 sigjmp_bufDecl(0), BlockDescriptorType(0), BlockDescriptorExtendedType(0), 139 NullTypeSourceInfo(QualType()), 140 SourceMgr(SM), LangOpts(LOpts), FreeMemory(FreeMem), Target(t), 141 Idents(idents), Selectors(sels), 142 BuiltinInfo(builtins), 143 DeclarationNames(*this), 144 ExternalSource(0), PrintingPolicy(LOpts), 145 LastSDM(0, 0) { 146 ObjCIdRedefinitionType = QualType(); 147 ObjCClassRedefinitionType = QualType(); 148 ObjCSelRedefinitionType = QualType(); 149 if (size_reserve > 0) Types.reserve(size_reserve); 150 TUDecl = TranslationUnitDecl::Create(*this); 151 InitBuiltinTypes(); 152} 153 154ASTContext::~ASTContext() { 155 // Release the DenseMaps associated with DeclContext objects. 156 // FIXME: Is this the ideal solution? 157 ReleaseDeclContextMaps(); 158 159 if (!FreeMemory) { 160 // Call all of the deallocation functions. 161 for (unsigned I = 0, N = Deallocations.size(); I != N; ++I) 162 Deallocations[I].first(Deallocations[I].second); 163 } 164 165 // Release all of the memory associated with overridden C++ methods. 166 for (llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::iterator 167 OM = OverriddenMethods.begin(), OMEnd = OverriddenMethods.end(); 168 OM != OMEnd; ++OM) 169 OM->second.Destroy(); 170 171 if (FreeMemory) { 172 // Deallocate all the types. 173 while (!Types.empty()) { 174 Types.back()->Destroy(*this); 175 Types.pop_back(); 176 } 177 178 for (llvm::FoldingSet<ExtQuals>::iterator 179 I = ExtQualNodes.begin(), E = ExtQualNodes.end(); I != E; ) { 180 // Increment in loop to prevent using deallocated memory. 181 Deallocate(&*I++); 182 } 183 184 for (llvm::DenseMap<const ObjCContainerDecl*, 185 const ASTRecordLayout*>::iterator 186 I = ObjCLayouts.begin(), E = ObjCLayouts.end(); I != E; ) { 187 // Increment in loop to prevent using deallocated memory. 188 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 189 R->Destroy(*this); 190 } 191 } 192 193 // ASTRecordLayout objects in ASTRecordLayouts must always be destroyed 194 // even when using the BumpPtrAllocator because they can contain 195 // DenseMaps. 196 for (llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*>::iterator 197 I = ASTRecordLayouts.begin(), E = ASTRecordLayouts.end(); I != E; ) { 198 // Increment in loop to prevent using deallocated memory. 199 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 200 R->Destroy(*this); 201 } 202 203 // Destroy nested-name-specifiers. 204 for (llvm::FoldingSet<NestedNameSpecifier>::iterator 205 NNS = NestedNameSpecifiers.begin(), 206 NNSEnd = NestedNameSpecifiers.end(); 207 NNS != NNSEnd; ) { 208 // Increment in loop to prevent using deallocated memory. 209 (*NNS++).Destroy(*this); 210 } 211 212 if (GlobalNestedNameSpecifier) 213 GlobalNestedNameSpecifier->Destroy(*this); 214 215 TUDecl->Destroy(*this); 216} 217 218void ASTContext::AddDeallocation(void (*Callback)(void*), void *Data) { 219 Deallocations.push_back(std::make_pair(Callback, Data)); 220} 221 222void 223ASTContext::setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source) { 224 ExternalSource.reset(Source.take()); 225} 226 227void ASTContext::PrintStats() const { 228 fprintf(stderr, "*** AST Context Stats:\n"); 229 fprintf(stderr, " %d types total.\n", (int)Types.size()); 230 231 unsigned counts[] = { 232#define TYPE(Name, Parent) 0, 233#define ABSTRACT_TYPE(Name, Parent) 234#include "clang/AST/TypeNodes.def" 235 0 // Extra 236 }; 237 238 for (unsigned i = 0, e = Types.size(); i != e; ++i) { 239 Type *T = Types[i]; 240 counts[(unsigned)T->getTypeClass()]++; 241 } 242 243 unsigned Idx = 0; 244 unsigned TotalBytes = 0; 245#define TYPE(Name, Parent) \ 246 if (counts[Idx]) \ 247 fprintf(stderr, " %d %s types\n", (int)counts[Idx], #Name); \ 248 TotalBytes += counts[Idx] * sizeof(Name##Type); \ 249 ++Idx; 250#define ABSTRACT_TYPE(Name, Parent) 251#include "clang/AST/TypeNodes.def" 252 253 fprintf(stderr, "Total bytes = %d\n", int(TotalBytes)); 254 255 if (ExternalSource.get()) { 256 fprintf(stderr, "\n"); 257 ExternalSource->PrintStats(); 258 } 259} 260 261 262void ASTContext::InitBuiltinType(CanQualType &R, BuiltinType::Kind K) { 263 BuiltinType *Ty = new (*this, TypeAlignment) BuiltinType(K); 264 R = CanQualType::CreateUnsafe(QualType(Ty, 0)); 265 Types.push_back(Ty); 266} 267 268void ASTContext::InitBuiltinTypes() { 269 assert(VoidTy.isNull() && "Context reinitialized?"); 270 271 // C99 6.2.5p19. 272 InitBuiltinType(VoidTy, BuiltinType::Void); 273 274 // C99 6.2.5p2. 275 InitBuiltinType(BoolTy, BuiltinType::Bool); 276 // C99 6.2.5p3. 277 if (LangOpts.CharIsSigned) 278 InitBuiltinType(CharTy, BuiltinType::Char_S); 279 else 280 InitBuiltinType(CharTy, BuiltinType::Char_U); 281 // C99 6.2.5p4. 282 InitBuiltinType(SignedCharTy, BuiltinType::SChar); 283 InitBuiltinType(ShortTy, BuiltinType::Short); 284 InitBuiltinType(IntTy, BuiltinType::Int); 285 InitBuiltinType(LongTy, BuiltinType::Long); 286 InitBuiltinType(LongLongTy, BuiltinType::LongLong); 287 288 // C99 6.2.5p6. 289 InitBuiltinType(UnsignedCharTy, BuiltinType::UChar); 290 InitBuiltinType(UnsignedShortTy, BuiltinType::UShort); 291 InitBuiltinType(UnsignedIntTy, BuiltinType::UInt); 292 InitBuiltinType(UnsignedLongTy, BuiltinType::ULong); 293 InitBuiltinType(UnsignedLongLongTy, BuiltinType::ULongLong); 294 295 // C99 6.2.5p10. 296 InitBuiltinType(FloatTy, BuiltinType::Float); 297 InitBuiltinType(DoubleTy, BuiltinType::Double); 298 InitBuiltinType(LongDoubleTy, BuiltinType::LongDouble); 299 300 // GNU extension, 128-bit integers. 301 InitBuiltinType(Int128Ty, BuiltinType::Int128); 302 InitBuiltinType(UnsignedInt128Ty, BuiltinType::UInt128); 303 304 if (LangOpts.CPlusPlus) // C++ 3.9.1p5 305 InitBuiltinType(WCharTy, BuiltinType::WChar); 306 else // C99 307 WCharTy = getFromTargetType(Target.getWCharType()); 308 309 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 310 InitBuiltinType(Char16Ty, BuiltinType::Char16); 311 else // C99 312 Char16Ty = getFromTargetType(Target.getChar16Type()); 313 314 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 315 InitBuiltinType(Char32Ty, BuiltinType::Char32); 316 else // C99 317 Char32Ty = getFromTargetType(Target.getChar32Type()); 318 319 // Placeholder type for functions. 320 InitBuiltinType(OverloadTy, BuiltinType::Overload); 321 322 // Placeholder type for type-dependent expressions whose type is 323 // completely unknown. No code should ever check a type against 324 // DependentTy and users should never see it; however, it is here to 325 // help diagnose failures to properly check for type-dependent 326 // expressions. 327 InitBuiltinType(DependentTy, BuiltinType::Dependent); 328 329 // Placeholder type for C++0x auto declarations whose real type has 330 // not yet been deduced. 331 InitBuiltinType(UndeducedAutoTy, BuiltinType::UndeducedAuto); 332 333 // C99 6.2.5p11. 334 FloatComplexTy = getComplexType(FloatTy); 335 DoubleComplexTy = getComplexType(DoubleTy); 336 LongDoubleComplexTy = getComplexType(LongDoubleTy); 337 338 BuiltinVaListType = QualType(); 339 340 // "Builtin" typedefs set by Sema::ActOnTranslationUnitScope(). 341 ObjCIdTypedefType = QualType(); 342 ObjCClassTypedefType = QualType(); 343 ObjCSelTypedefType = QualType(); 344 345 // Builtin types for 'id', 'Class', and 'SEL'. 346 InitBuiltinType(ObjCBuiltinIdTy, BuiltinType::ObjCId); 347 InitBuiltinType(ObjCBuiltinClassTy, BuiltinType::ObjCClass); 348 InitBuiltinType(ObjCBuiltinSelTy, BuiltinType::ObjCSel); 349 350 ObjCConstantStringType = QualType(); 351 352 // void * type 353 VoidPtrTy = getPointerType(VoidTy); 354 355 // nullptr type (C++0x 2.14.7) 356 InitBuiltinType(NullPtrTy, BuiltinType::NullPtr); 357} 358 359MemberSpecializationInfo * 360ASTContext::getInstantiatedFromStaticDataMember(const VarDecl *Var) { 361 assert(Var->isStaticDataMember() && "Not a static data member"); 362 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *>::iterator Pos 363 = InstantiatedFromStaticDataMember.find(Var); 364 if (Pos == InstantiatedFromStaticDataMember.end()) 365 return 0; 366 367 return Pos->second; 368} 369 370void 371ASTContext::setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 372 TemplateSpecializationKind TSK) { 373 assert(Inst->isStaticDataMember() && "Not a static data member"); 374 assert(Tmpl->isStaticDataMember() && "Not a static data member"); 375 assert(!InstantiatedFromStaticDataMember[Inst] && 376 "Already noted what static data member was instantiated from"); 377 InstantiatedFromStaticDataMember[Inst] 378 = new (*this) MemberSpecializationInfo(Tmpl, TSK); 379} 380 381NamedDecl * 382ASTContext::getInstantiatedFromUsingDecl(UsingDecl *UUD) { 383 llvm::DenseMap<UsingDecl *, NamedDecl *>::const_iterator Pos 384 = InstantiatedFromUsingDecl.find(UUD); 385 if (Pos == InstantiatedFromUsingDecl.end()) 386 return 0; 387 388 return Pos->second; 389} 390 391void 392ASTContext::setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern) { 393 assert((isa<UsingDecl>(Pattern) || 394 isa<UnresolvedUsingValueDecl>(Pattern) || 395 isa<UnresolvedUsingTypenameDecl>(Pattern)) && 396 "pattern decl is not a using decl"); 397 assert(!InstantiatedFromUsingDecl[Inst] && "pattern already exists"); 398 InstantiatedFromUsingDecl[Inst] = Pattern; 399} 400 401UsingShadowDecl * 402ASTContext::getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst) { 403 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*>::const_iterator Pos 404 = InstantiatedFromUsingShadowDecl.find(Inst); 405 if (Pos == InstantiatedFromUsingShadowDecl.end()) 406 return 0; 407 408 return Pos->second; 409} 410 411void 412ASTContext::setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 413 UsingShadowDecl *Pattern) { 414 assert(!InstantiatedFromUsingShadowDecl[Inst] && "pattern already exists"); 415 InstantiatedFromUsingShadowDecl[Inst] = Pattern; 416} 417 418FieldDecl *ASTContext::getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field) { 419 llvm::DenseMap<FieldDecl *, FieldDecl *>::iterator Pos 420 = InstantiatedFromUnnamedFieldDecl.find(Field); 421 if (Pos == InstantiatedFromUnnamedFieldDecl.end()) 422 return 0; 423 424 return Pos->second; 425} 426 427void ASTContext::setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, 428 FieldDecl *Tmpl) { 429 assert(!Inst->getDeclName() && "Instantiated field decl is not unnamed"); 430 assert(!Tmpl->getDeclName() && "Template field decl is not unnamed"); 431 assert(!InstantiatedFromUnnamedFieldDecl[Inst] && 432 "Already noted what unnamed field was instantiated from"); 433 434 InstantiatedFromUnnamedFieldDecl[Inst] = Tmpl; 435} 436 437ASTContext::overridden_cxx_method_iterator 438ASTContext::overridden_methods_begin(const CXXMethodDecl *Method) const { 439 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 440 = OverriddenMethods.find(Method); 441 if (Pos == OverriddenMethods.end()) 442 return 0; 443 444 return Pos->second.begin(); 445} 446 447ASTContext::overridden_cxx_method_iterator 448ASTContext::overridden_methods_end(const CXXMethodDecl *Method) const { 449 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 450 = OverriddenMethods.find(Method); 451 if (Pos == OverriddenMethods.end()) 452 return 0; 453 454 return Pos->second.end(); 455} 456 457void ASTContext::addOverriddenMethod(const CXXMethodDecl *Method, 458 const CXXMethodDecl *Overridden) { 459 OverriddenMethods[Method].push_back(Overridden); 460} 461 462namespace { 463 class BeforeInTranslationUnit 464 : std::binary_function<SourceRange, SourceRange, bool> { 465 SourceManager *SourceMgr; 466 467 public: 468 explicit BeforeInTranslationUnit(SourceManager *SM) : SourceMgr(SM) { } 469 470 bool operator()(SourceRange X, SourceRange Y) { 471 return SourceMgr->isBeforeInTranslationUnit(X.getBegin(), Y.getBegin()); 472 } 473 }; 474} 475 476//===----------------------------------------------------------------------===// 477// Type Sizing and Analysis 478//===----------------------------------------------------------------------===// 479 480/// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 481/// scalar floating point type. 482const llvm::fltSemantics &ASTContext::getFloatTypeSemantics(QualType T) const { 483 const BuiltinType *BT = T->getAs<BuiltinType>(); 484 assert(BT && "Not a floating point type!"); 485 switch (BT->getKind()) { 486 default: assert(0 && "Not a floating point type!"); 487 case BuiltinType::Float: return Target.getFloatFormat(); 488 case BuiltinType::Double: return Target.getDoubleFormat(); 489 case BuiltinType::LongDouble: return Target.getLongDoubleFormat(); 490 } 491} 492 493/// getDeclAlign - Return a conservative estimate of the alignment of the 494/// specified decl. Note that bitfields do not have a valid alignment, so 495/// this method will assert on them. 496/// If @p RefAsPointee, references are treated like their underlying type 497/// (for alignof), else they're treated like pointers (for CodeGen). 498CharUnits ASTContext::getDeclAlign(const Decl *D, bool RefAsPointee) { 499 unsigned Align = Target.getCharWidth(); 500 501 if (const AlignedAttr* AA = D->getAttr<AlignedAttr>()) 502 Align = std::max(Align, AA->getMaxAlignment()); 503 504 if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) { 505 QualType T = VD->getType(); 506 if (const ReferenceType* RT = T->getAs<ReferenceType>()) { 507 if (RefAsPointee) 508 T = RT->getPointeeType(); 509 else 510 T = getPointerType(RT->getPointeeType()); 511 } 512 if (!T->isIncompleteType() && !T->isFunctionType()) { 513 unsigned MinWidth = Target.getLargeArrayMinWidth(); 514 unsigned ArrayAlign = Target.getLargeArrayAlign(); 515 if (isa<VariableArrayType>(T) && MinWidth != 0) 516 Align = std::max(Align, ArrayAlign); 517 if (ConstantArrayType *CT = dyn_cast<ConstantArrayType>(T)) { 518 unsigned Size = getTypeSize(CT); 519 if (MinWidth != 0 && MinWidth <= Size) 520 Align = std::max(Align, ArrayAlign); 521 } 522 // Incomplete or function types default to 1. 523 while (isa<VariableArrayType>(T) || isa<IncompleteArrayType>(T)) 524 T = cast<ArrayType>(T)->getElementType(); 525 526 Align = std::max(Align, getPreferredTypeAlign(T.getTypePtr())); 527 } 528 if (const FieldDecl *FD = dyn_cast<FieldDecl>(VD)) { 529 // In the case of a field in a packed struct, we want the minimum 530 // of the alignment of the field and the alignment of the struct. 531 Align = std::min(Align, 532 getPreferredTypeAlign(FD->getParent()->getTypeForDecl())); 533 } 534 } 535 536 return CharUnits::fromQuantity(Align / Target.getCharWidth()); 537} 538 539std::pair<CharUnits, CharUnits> 540ASTContext::getTypeInfoInChars(const Type *T) { 541 std::pair<uint64_t, unsigned> Info = getTypeInfo(T); 542 return std::make_pair(CharUnits::fromQuantity(Info.first / getCharWidth()), 543 CharUnits::fromQuantity(Info.second / getCharWidth())); 544} 545 546std::pair<CharUnits, CharUnits> 547ASTContext::getTypeInfoInChars(QualType T) { 548 return getTypeInfoInChars(T.getTypePtr()); 549} 550 551/// getTypeSize - Return the size of the specified type, in bits. This method 552/// does not work on incomplete types. 553/// 554/// FIXME: Pointers into different addr spaces could have different sizes and 555/// alignment requirements: getPointerInfo should take an AddrSpace, this 556/// should take a QualType, &c. 557std::pair<uint64_t, unsigned> 558ASTContext::getTypeInfo(const Type *T) { 559 uint64_t Width=0; 560 unsigned Align=8; 561 switch (T->getTypeClass()) { 562#define TYPE(Class, Base) 563#define ABSTRACT_TYPE(Class, Base) 564#define NON_CANONICAL_TYPE(Class, Base) 565#define DEPENDENT_TYPE(Class, Base) case Type::Class: 566#include "clang/AST/TypeNodes.def" 567 assert(false && "Should not see dependent types"); 568 break; 569 570 case Type::FunctionNoProto: 571 case Type::FunctionProto: 572 // GCC extension: alignof(function) = 32 bits 573 Width = 0; 574 Align = 32; 575 break; 576 577 case Type::IncompleteArray: 578 case Type::VariableArray: 579 Width = 0; 580 Align = getTypeAlign(cast<ArrayType>(T)->getElementType()); 581 break; 582 583 case Type::ConstantArray: { 584 const ConstantArrayType *CAT = cast<ConstantArrayType>(T); 585 586 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(CAT->getElementType()); 587 Width = EltInfo.first*CAT->getSize().getZExtValue(); 588 Align = EltInfo.second; 589 break; 590 } 591 case Type::ExtVector: 592 case Type::Vector: { 593 const VectorType *VT = cast<VectorType>(T); 594 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(VT->getElementType()); 595 Width = EltInfo.first*VT->getNumElements(); 596 Align = Width; 597 // If the alignment is not a power of 2, round up to the next power of 2. 598 // This happens for non-power-of-2 length vectors. 599 if (Align & (Align-1)) { 600 Align = llvm::NextPowerOf2(Align); 601 Width = llvm::RoundUpToAlignment(Width, Align); 602 } 603 break; 604 } 605 606 case Type::Builtin: 607 switch (cast<BuiltinType>(T)->getKind()) { 608 default: assert(0 && "Unknown builtin type!"); 609 case BuiltinType::Void: 610 // GCC extension: alignof(void) = 8 bits. 611 Width = 0; 612 Align = 8; 613 break; 614 615 case BuiltinType::Bool: 616 Width = Target.getBoolWidth(); 617 Align = Target.getBoolAlign(); 618 break; 619 case BuiltinType::Char_S: 620 case BuiltinType::Char_U: 621 case BuiltinType::UChar: 622 case BuiltinType::SChar: 623 Width = Target.getCharWidth(); 624 Align = Target.getCharAlign(); 625 break; 626 case BuiltinType::WChar: 627 Width = Target.getWCharWidth(); 628 Align = Target.getWCharAlign(); 629 break; 630 case BuiltinType::Char16: 631 Width = Target.getChar16Width(); 632 Align = Target.getChar16Align(); 633 break; 634 case BuiltinType::Char32: 635 Width = Target.getChar32Width(); 636 Align = Target.getChar32Align(); 637 break; 638 case BuiltinType::UShort: 639 case BuiltinType::Short: 640 Width = Target.getShortWidth(); 641 Align = Target.getShortAlign(); 642 break; 643 case BuiltinType::UInt: 644 case BuiltinType::Int: 645 Width = Target.getIntWidth(); 646 Align = Target.getIntAlign(); 647 break; 648 case BuiltinType::ULong: 649 case BuiltinType::Long: 650 Width = Target.getLongWidth(); 651 Align = Target.getLongAlign(); 652 break; 653 case BuiltinType::ULongLong: 654 case BuiltinType::LongLong: 655 Width = Target.getLongLongWidth(); 656 Align = Target.getLongLongAlign(); 657 break; 658 case BuiltinType::Int128: 659 case BuiltinType::UInt128: 660 Width = 128; 661 Align = 128; // int128_t is 128-bit aligned on all targets. 662 break; 663 case BuiltinType::Float: 664 Width = Target.getFloatWidth(); 665 Align = Target.getFloatAlign(); 666 break; 667 case BuiltinType::Double: 668 Width = Target.getDoubleWidth(); 669 Align = Target.getDoubleAlign(); 670 break; 671 case BuiltinType::LongDouble: 672 Width = Target.getLongDoubleWidth(); 673 Align = Target.getLongDoubleAlign(); 674 break; 675 case BuiltinType::NullPtr: 676 Width = Target.getPointerWidth(0); // C++ 3.9.1p11: sizeof(nullptr_t) 677 Align = Target.getPointerAlign(0); // == sizeof(void*) 678 break; 679 } 680 break; 681 case Type::ObjCObjectPointer: 682 Width = Target.getPointerWidth(0); 683 Align = Target.getPointerAlign(0); 684 break; 685 case Type::BlockPointer: { 686 unsigned AS = cast<BlockPointerType>(T)->getPointeeType().getAddressSpace(); 687 Width = Target.getPointerWidth(AS); 688 Align = Target.getPointerAlign(AS); 689 break; 690 } 691 case Type::LValueReference: 692 case Type::RValueReference: { 693 // alignof and sizeof should never enter this code path here, so we go 694 // the pointer route. 695 unsigned AS = cast<ReferenceType>(T)->getPointeeType().getAddressSpace(); 696 Width = Target.getPointerWidth(AS); 697 Align = Target.getPointerAlign(AS); 698 break; 699 } 700 case Type::Pointer: { 701 unsigned AS = cast<PointerType>(T)->getPointeeType().getAddressSpace(); 702 Width = Target.getPointerWidth(AS); 703 Align = Target.getPointerAlign(AS); 704 break; 705 } 706 case Type::MemberPointer: { 707 QualType Pointee = cast<MemberPointerType>(T)->getPointeeType(); 708 std::pair<uint64_t, unsigned> PtrDiffInfo = 709 getTypeInfo(getPointerDiffType()); 710 Width = PtrDiffInfo.first; 711 if (Pointee->isFunctionType()) 712 Width *= 2; 713 Align = PtrDiffInfo.second; 714 break; 715 } 716 case Type::Complex: { 717 // Complex types have the same alignment as their elements, but twice the 718 // size. 719 std::pair<uint64_t, unsigned> EltInfo = 720 getTypeInfo(cast<ComplexType>(T)->getElementType()); 721 Width = EltInfo.first*2; 722 Align = EltInfo.second; 723 break; 724 } 725 case Type::ObjCObject: 726 return getTypeInfo(cast<ObjCObjectType>(T)->getBaseType().getTypePtr()); 727 case Type::ObjCInterface: { 728 const ObjCInterfaceType *ObjCI = cast<ObjCInterfaceType>(T); 729 const ASTRecordLayout &Layout = getASTObjCInterfaceLayout(ObjCI->getDecl()); 730 Width = Layout.getSize(); 731 Align = Layout.getAlignment(); 732 break; 733 } 734 case Type::Record: 735 case Type::Enum: { 736 const TagType *TT = cast<TagType>(T); 737 738 if (TT->getDecl()->isInvalidDecl()) { 739 Width = 1; 740 Align = 1; 741 break; 742 } 743 744 if (const EnumType *ET = dyn_cast<EnumType>(TT)) 745 return getTypeInfo(ET->getDecl()->getIntegerType()); 746 747 const RecordType *RT = cast<RecordType>(TT); 748 const ASTRecordLayout &Layout = getASTRecordLayout(RT->getDecl()); 749 Width = Layout.getSize(); 750 Align = Layout.getAlignment(); 751 break; 752 } 753 754 case Type::SubstTemplateTypeParm: 755 return getTypeInfo(cast<SubstTemplateTypeParmType>(T)-> 756 getReplacementType().getTypePtr()); 757 758 case Type::Typedef: { 759 const TypedefDecl *Typedef = cast<TypedefType>(T)->getDecl(); 760 if (const AlignedAttr *Aligned = Typedef->getAttr<AlignedAttr>()) { 761 Align = std::max(Aligned->getMaxAlignment(), 762 getTypeAlign(Typedef->getUnderlyingType().getTypePtr())); 763 Width = getTypeSize(Typedef->getUnderlyingType().getTypePtr()); 764 } else 765 return getTypeInfo(Typedef->getUnderlyingType().getTypePtr()); 766 break; 767 } 768 769 case Type::TypeOfExpr: 770 return getTypeInfo(cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType() 771 .getTypePtr()); 772 773 case Type::TypeOf: 774 return getTypeInfo(cast<TypeOfType>(T)->getUnderlyingType().getTypePtr()); 775 776 case Type::Decltype: 777 return getTypeInfo(cast<DecltypeType>(T)->getUnderlyingExpr()->getType() 778 .getTypePtr()); 779 780 case Type::Elaborated: 781 return getTypeInfo(cast<ElaboratedType>(T)->getNamedType().getTypePtr()); 782 783 case Type::TemplateSpecialization: 784 assert(getCanonicalType(T) != T && 785 "Cannot request the size of a dependent type"); 786 // FIXME: this is likely to be wrong once we support template 787 // aliases, since a template alias could refer to a typedef that 788 // has an __aligned__ attribute on it. 789 return getTypeInfo(getCanonicalType(T)); 790 } 791 792 assert(Align && (Align & (Align-1)) == 0 && "Alignment must be power of 2"); 793 return std::make_pair(Width, Align); 794} 795 796/// getTypeSizeInChars - Return the size of the specified type, in characters. 797/// This method does not work on incomplete types. 798CharUnits ASTContext::getTypeSizeInChars(QualType T) { 799 return CharUnits::fromQuantity(getTypeSize(T) / getCharWidth()); 800} 801CharUnits ASTContext::getTypeSizeInChars(const Type *T) { 802 return CharUnits::fromQuantity(getTypeSize(T) / getCharWidth()); 803} 804 805/// getTypeAlignInChars - Return the ABI-specified alignment of a type, in 806/// characters. This method does not work on incomplete types. 807CharUnits ASTContext::getTypeAlignInChars(QualType T) { 808 return CharUnits::fromQuantity(getTypeAlign(T) / getCharWidth()); 809} 810CharUnits ASTContext::getTypeAlignInChars(const Type *T) { 811 return CharUnits::fromQuantity(getTypeAlign(T) / getCharWidth()); 812} 813 814/// getPreferredTypeAlign - Return the "preferred" alignment of the specified 815/// type for the current target in bits. This can be different than the ABI 816/// alignment in cases where it is beneficial for performance to overalign 817/// a data type. 818unsigned ASTContext::getPreferredTypeAlign(const Type *T) { 819 unsigned ABIAlign = getTypeAlign(T); 820 821 // Double and long long should be naturally aligned if possible. 822 if (const ComplexType* CT = T->getAs<ComplexType>()) 823 T = CT->getElementType().getTypePtr(); 824 if (T->isSpecificBuiltinType(BuiltinType::Double) || 825 T->isSpecificBuiltinType(BuiltinType::LongLong)) 826 return std::max(ABIAlign, (unsigned)getTypeSize(T)); 827 828 return ABIAlign; 829} 830 831static void CollectLocalObjCIvars(ASTContext *Ctx, 832 const ObjCInterfaceDecl *OI, 833 llvm::SmallVectorImpl<FieldDecl*> &Fields) { 834 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 835 E = OI->ivar_end(); I != E; ++I) { 836 ObjCIvarDecl *IVDecl = *I; 837 if (!IVDecl->isInvalidDecl()) 838 Fields.push_back(cast<FieldDecl>(IVDecl)); 839 } 840} 841 842void ASTContext::CollectObjCIvars(const ObjCInterfaceDecl *OI, 843 llvm::SmallVectorImpl<FieldDecl*> &Fields) { 844 if (const ObjCInterfaceDecl *SuperClass = OI->getSuperClass()) 845 CollectObjCIvars(SuperClass, Fields); 846 CollectLocalObjCIvars(this, OI, Fields); 847} 848 849/// ShallowCollectObjCIvars - 850/// Collect all ivars, including those synthesized, in the current class. 851/// 852void ASTContext::ShallowCollectObjCIvars(const ObjCInterfaceDecl *OI, 853 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 854 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 855 E = OI->ivar_end(); I != E; ++I) { 856 Ivars.push_back(*I); 857 } 858 859 CollectNonClassIvars(OI, Ivars); 860} 861 862/// CollectNonClassIvars - 863/// This routine collects all other ivars which are not declared in the class. 864/// This includes synthesized ivars (via @synthesize) and those in 865// class's @implementation. 866/// 867void ASTContext::CollectNonClassIvars(const ObjCInterfaceDecl *OI, 868 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 869 // Find ivars declared in class extension. 870 if (const ObjCCategoryDecl *CDecl = OI->getClassExtension()) { 871 for (ObjCCategoryDecl::ivar_iterator I = CDecl->ivar_begin(), 872 E = CDecl->ivar_end(); I != E; ++I) { 873 Ivars.push_back(*I); 874 } 875 } 876 877 // Also add any ivar defined in this class's implementation. This 878 // includes synthesized ivars. 879 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) { 880 for (ObjCImplementationDecl::ivar_iterator I = ImplDecl->ivar_begin(), 881 E = ImplDecl->ivar_end(); I != E; ++I) 882 Ivars.push_back(*I); 883 } 884} 885 886/// CollectInheritedProtocols - Collect all protocols in current class and 887/// those inherited by it. 888void ASTContext::CollectInheritedProtocols(const Decl *CDecl, 889 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols) { 890 if (const ObjCInterfaceDecl *OI = dyn_cast<ObjCInterfaceDecl>(CDecl)) { 891 for (ObjCInterfaceDecl::protocol_iterator P = OI->protocol_begin(), 892 PE = OI->protocol_end(); P != PE; ++P) { 893 ObjCProtocolDecl *Proto = (*P); 894 Protocols.insert(Proto); 895 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 896 PE = Proto->protocol_end(); P != PE; ++P) { 897 Protocols.insert(*P); 898 CollectInheritedProtocols(*P, Protocols); 899 } 900 } 901 902 // Categories of this Interface. 903 for (const ObjCCategoryDecl *CDeclChain = OI->getCategoryList(); 904 CDeclChain; CDeclChain = CDeclChain->getNextClassCategory()) 905 CollectInheritedProtocols(CDeclChain, Protocols); 906 if (ObjCInterfaceDecl *SD = OI->getSuperClass()) 907 while (SD) { 908 CollectInheritedProtocols(SD, Protocols); 909 SD = SD->getSuperClass(); 910 } 911 } else if (const ObjCCategoryDecl *OC = dyn_cast<ObjCCategoryDecl>(CDecl)) { 912 for (ObjCInterfaceDecl::protocol_iterator P = OC->protocol_begin(), 913 PE = OC->protocol_end(); P != PE; ++P) { 914 ObjCProtocolDecl *Proto = (*P); 915 Protocols.insert(Proto); 916 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 917 PE = Proto->protocol_end(); P != PE; ++P) 918 CollectInheritedProtocols(*P, Protocols); 919 } 920 } else if (const ObjCProtocolDecl *OP = dyn_cast<ObjCProtocolDecl>(CDecl)) { 921 for (ObjCProtocolDecl::protocol_iterator P = OP->protocol_begin(), 922 PE = OP->protocol_end(); P != PE; ++P) { 923 ObjCProtocolDecl *Proto = (*P); 924 Protocols.insert(Proto); 925 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 926 PE = Proto->protocol_end(); P != PE; ++P) 927 CollectInheritedProtocols(*P, Protocols); 928 } 929 } 930} 931 932unsigned ASTContext::CountNonClassIvars(const ObjCInterfaceDecl *OI) { 933 unsigned count = 0; 934 // Count ivars declared in class extension. 935 if (const ObjCCategoryDecl *CDecl = OI->getClassExtension()) 936 count += CDecl->ivar_size(); 937 938 // Count ivar defined in this class's implementation. This 939 // includes synthesized ivars. 940 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) 941 count += ImplDecl->ivar_size(); 942 943 return count; 944} 945 946/// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 947ObjCImplementationDecl *ASTContext::getObjCImplementation(ObjCInterfaceDecl *D) { 948 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 949 I = ObjCImpls.find(D); 950 if (I != ObjCImpls.end()) 951 return cast<ObjCImplementationDecl>(I->second); 952 return 0; 953} 954/// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 955ObjCCategoryImplDecl *ASTContext::getObjCImplementation(ObjCCategoryDecl *D) { 956 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 957 I = ObjCImpls.find(D); 958 if (I != ObjCImpls.end()) 959 return cast<ObjCCategoryImplDecl>(I->second); 960 return 0; 961} 962 963/// \brief Set the implementation of ObjCInterfaceDecl. 964void ASTContext::setObjCImplementation(ObjCInterfaceDecl *IFaceD, 965 ObjCImplementationDecl *ImplD) { 966 assert(IFaceD && ImplD && "Passed null params"); 967 ObjCImpls[IFaceD] = ImplD; 968} 969/// \brief Set the implementation of ObjCCategoryDecl. 970void ASTContext::setObjCImplementation(ObjCCategoryDecl *CatD, 971 ObjCCategoryImplDecl *ImplD) { 972 assert(CatD && ImplD && "Passed null params"); 973 ObjCImpls[CatD] = ImplD; 974} 975 976/// \brief Allocate an uninitialized TypeSourceInfo. 977/// 978/// The caller should initialize the memory held by TypeSourceInfo using 979/// the TypeLoc wrappers. 980/// 981/// \param T the type that will be the basis for type source info. This type 982/// should refer to how the declarator was written in source code, not to 983/// what type semantic analysis resolved the declarator to. 984TypeSourceInfo *ASTContext::CreateTypeSourceInfo(QualType T, 985 unsigned DataSize) { 986 if (!DataSize) 987 DataSize = TypeLoc::getFullDataSizeForType(T); 988 else 989 assert(DataSize == TypeLoc::getFullDataSizeForType(T) && 990 "incorrect data size provided to CreateTypeSourceInfo!"); 991 992 TypeSourceInfo *TInfo = 993 (TypeSourceInfo*)BumpAlloc.Allocate(sizeof(TypeSourceInfo) + DataSize, 8); 994 new (TInfo) TypeSourceInfo(T); 995 return TInfo; 996} 997 998TypeSourceInfo *ASTContext::getTrivialTypeSourceInfo(QualType T, 999 SourceLocation L) { 1000 TypeSourceInfo *DI = CreateTypeSourceInfo(T); 1001 DI->getTypeLoc().initialize(L); 1002 return DI; 1003} 1004 1005const ASTRecordLayout & 1006ASTContext::getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) { 1007 return getObjCLayout(D, 0); 1008} 1009 1010const ASTRecordLayout & 1011ASTContext::getASTObjCImplementationLayout(const ObjCImplementationDecl *D) { 1012 return getObjCLayout(D->getClassInterface(), D); 1013} 1014 1015//===----------------------------------------------------------------------===// 1016// Type creation/memoization methods 1017//===----------------------------------------------------------------------===// 1018 1019QualType ASTContext::getExtQualType(const Type *TypeNode, Qualifiers Quals) { 1020 unsigned Fast = Quals.getFastQualifiers(); 1021 Quals.removeFastQualifiers(); 1022 1023 // Check if we've already instantiated this type. 1024 llvm::FoldingSetNodeID ID; 1025 ExtQuals::Profile(ID, TypeNode, Quals); 1026 void *InsertPos = 0; 1027 if (ExtQuals *EQ = ExtQualNodes.FindNodeOrInsertPos(ID, InsertPos)) { 1028 assert(EQ->getQualifiers() == Quals); 1029 QualType T = QualType(EQ, Fast); 1030 return T; 1031 } 1032 1033 ExtQuals *New = new (*this, TypeAlignment) ExtQuals(*this, TypeNode, Quals); 1034 ExtQualNodes.InsertNode(New, InsertPos); 1035 QualType T = QualType(New, Fast); 1036 return T; 1037} 1038 1039QualType ASTContext::getVolatileType(QualType T) { 1040 QualType CanT = getCanonicalType(T); 1041 if (CanT.isVolatileQualified()) return T; 1042 1043 QualifierCollector Quals; 1044 const Type *TypeNode = Quals.strip(T); 1045 Quals.addVolatile(); 1046 1047 return getExtQualType(TypeNode, Quals); 1048} 1049 1050QualType ASTContext::getAddrSpaceQualType(QualType T, unsigned AddressSpace) { 1051 QualType CanT = getCanonicalType(T); 1052 if (CanT.getAddressSpace() == AddressSpace) 1053 return T; 1054 1055 // If we are composing extended qualifiers together, merge together 1056 // into one ExtQuals node. 1057 QualifierCollector Quals; 1058 const Type *TypeNode = Quals.strip(T); 1059 1060 // If this type already has an address space specified, it cannot get 1061 // another one. 1062 assert(!Quals.hasAddressSpace() && 1063 "Type cannot be in multiple addr spaces!"); 1064 Quals.addAddressSpace(AddressSpace); 1065 1066 return getExtQualType(TypeNode, Quals); 1067} 1068 1069QualType ASTContext::getObjCGCQualType(QualType T, 1070 Qualifiers::GC GCAttr) { 1071 QualType CanT = getCanonicalType(T); 1072 if (CanT.getObjCGCAttr() == GCAttr) 1073 return T; 1074 1075 if (T->isPointerType()) { 1076 QualType Pointee = T->getAs<PointerType>()->getPointeeType(); 1077 if (Pointee->isAnyPointerType()) { 1078 QualType ResultType = getObjCGCQualType(Pointee, GCAttr); 1079 return getPointerType(ResultType); 1080 } 1081 } 1082 1083 // If we are composing extended qualifiers together, merge together 1084 // into one ExtQuals node. 1085 QualifierCollector Quals; 1086 const Type *TypeNode = Quals.strip(T); 1087 1088 // If this type already has an ObjCGC specified, it cannot get 1089 // another one. 1090 assert(!Quals.hasObjCGCAttr() && 1091 "Type cannot have multiple ObjCGCs!"); 1092 Quals.addObjCGCAttr(GCAttr); 1093 1094 return getExtQualType(TypeNode, Quals); 1095} 1096 1097static QualType getExtFunctionType(ASTContext& Context, QualType T, 1098 const FunctionType::ExtInfo &Info) { 1099 QualType ResultType; 1100 if (const PointerType *Pointer = T->getAs<PointerType>()) { 1101 QualType Pointee = Pointer->getPointeeType(); 1102 ResultType = getExtFunctionType(Context, Pointee, Info); 1103 if (ResultType == Pointee) 1104 return T; 1105 1106 ResultType = Context.getPointerType(ResultType); 1107 } else if (const BlockPointerType *BlockPointer 1108 = T->getAs<BlockPointerType>()) { 1109 QualType Pointee = BlockPointer->getPointeeType(); 1110 ResultType = getExtFunctionType(Context, Pointee, Info); 1111 if (ResultType == Pointee) 1112 return T; 1113 1114 ResultType = Context.getBlockPointerType(ResultType); 1115 } else if (const FunctionType *F = T->getAs<FunctionType>()) { 1116 if (F->getExtInfo() == Info) 1117 return T; 1118 1119 if (const FunctionNoProtoType *FNPT = dyn_cast<FunctionNoProtoType>(F)) { 1120 ResultType = Context.getFunctionNoProtoType(FNPT->getResultType(), 1121 Info); 1122 } else { 1123 const FunctionProtoType *FPT = cast<FunctionProtoType>(F); 1124 ResultType 1125 = Context.getFunctionType(FPT->getResultType(), FPT->arg_type_begin(), 1126 FPT->getNumArgs(), FPT->isVariadic(), 1127 FPT->getTypeQuals(), 1128 FPT->hasExceptionSpec(), 1129 FPT->hasAnyExceptionSpec(), 1130 FPT->getNumExceptions(), 1131 FPT->exception_begin(), 1132 Info); 1133 } 1134 } else 1135 return T; 1136 1137 return Context.getQualifiedType(ResultType, T.getLocalQualifiers()); 1138} 1139 1140QualType ASTContext::getNoReturnType(QualType T, bool AddNoReturn) { 1141 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1142 return getExtFunctionType(*this, T, 1143 Info.withNoReturn(AddNoReturn)); 1144} 1145 1146QualType ASTContext::getCallConvType(QualType T, CallingConv CallConv) { 1147 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1148 return getExtFunctionType(*this, T, 1149 Info.withCallingConv(CallConv)); 1150} 1151 1152QualType ASTContext::getRegParmType(QualType T, unsigned RegParm) { 1153 FunctionType::ExtInfo Info = getFunctionExtInfo(T); 1154 return getExtFunctionType(*this, T, 1155 Info.withRegParm(RegParm)); 1156} 1157 1158/// getComplexType - Return the uniqued reference to the type for a complex 1159/// number with the specified element type. 1160QualType ASTContext::getComplexType(QualType T) { 1161 // Unique pointers, to guarantee there is only one pointer of a particular 1162 // structure. 1163 llvm::FoldingSetNodeID ID; 1164 ComplexType::Profile(ID, T); 1165 1166 void *InsertPos = 0; 1167 if (ComplexType *CT = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos)) 1168 return QualType(CT, 0); 1169 1170 // If the pointee type isn't canonical, this won't be a canonical type either, 1171 // so fill in the canonical type field. 1172 QualType Canonical; 1173 if (!T.isCanonical()) { 1174 Canonical = getComplexType(getCanonicalType(T)); 1175 1176 // Get the new insert position for the node we care about. 1177 ComplexType *NewIP = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos); 1178 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1179 } 1180 ComplexType *New = new (*this, TypeAlignment) ComplexType(T, Canonical); 1181 Types.push_back(New); 1182 ComplexTypes.InsertNode(New, InsertPos); 1183 return QualType(New, 0); 1184} 1185 1186/// getPointerType - Return the uniqued reference to the type for a pointer to 1187/// the specified type. 1188QualType ASTContext::getPointerType(QualType T) { 1189 // Unique pointers, to guarantee there is only one pointer of a particular 1190 // structure. 1191 llvm::FoldingSetNodeID ID; 1192 PointerType::Profile(ID, T); 1193 1194 void *InsertPos = 0; 1195 if (PointerType *PT = PointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1196 return QualType(PT, 0); 1197 1198 // If the pointee type isn't canonical, this won't be a canonical type either, 1199 // so fill in the canonical type field. 1200 QualType Canonical; 1201 if (!T.isCanonical()) { 1202 Canonical = getPointerType(getCanonicalType(T)); 1203 1204 // Get the new insert position for the node we care about. 1205 PointerType *NewIP = PointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1206 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1207 } 1208 PointerType *New = new (*this, TypeAlignment) PointerType(T, Canonical); 1209 Types.push_back(New); 1210 PointerTypes.InsertNode(New, InsertPos); 1211 return QualType(New, 0); 1212} 1213 1214/// getBlockPointerType - Return the uniqued reference to the type for 1215/// a pointer to the specified block. 1216QualType ASTContext::getBlockPointerType(QualType T) { 1217 assert(T->isFunctionType() && "block of function types only"); 1218 // Unique pointers, to guarantee there is only one block of a particular 1219 // structure. 1220 llvm::FoldingSetNodeID ID; 1221 BlockPointerType::Profile(ID, T); 1222 1223 void *InsertPos = 0; 1224 if (BlockPointerType *PT = 1225 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1226 return QualType(PT, 0); 1227 1228 // If the block pointee type isn't canonical, this won't be a canonical 1229 // type either so fill in the canonical type field. 1230 QualType Canonical; 1231 if (!T.isCanonical()) { 1232 Canonical = getBlockPointerType(getCanonicalType(T)); 1233 1234 // Get the new insert position for the node we care about. 1235 BlockPointerType *NewIP = 1236 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1237 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1238 } 1239 BlockPointerType *New 1240 = new (*this, TypeAlignment) BlockPointerType(T, Canonical); 1241 Types.push_back(New); 1242 BlockPointerTypes.InsertNode(New, InsertPos); 1243 return QualType(New, 0); 1244} 1245 1246/// getLValueReferenceType - Return the uniqued reference to the type for an 1247/// lvalue reference to the specified type. 1248QualType ASTContext::getLValueReferenceType(QualType T, bool SpelledAsLValue) { 1249 // Unique pointers, to guarantee there is only one pointer of a particular 1250 // structure. 1251 llvm::FoldingSetNodeID ID; 1252 ReferenceType::Profile(ID, T, SpelledAsLValue); 1253 1254 void *InsertPos = 0; 1255 if (LValueReferenceType *RT = 1256 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1257 return QualType(RT, 0); 1258 1259 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1260 1261 // If the referencee type isn't canonical, this won't be a canonical type 1262 // either, so fill in the canonical type field. 1263 QualType Canonical; 1264 if (!SpelledAsLValue || InnerRef || !T.isCanonical()) { 1265 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1266 Canonical = getLValueReferenceType(getCanonicalType(PointeeType)); 1267 1268 // Get the new insert position for the node we care about. 1269 LValueReferenceType *NewIP = 1270 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1271 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1272 } 1273 1274 LValueReferenceType *New 1275 = new (*this, TypeAlignment) LValueReferenceType(T, Canonical, 1276 SpelledAsLValue); 1277 Types.push_back(New); 1278 LValueReferenceTypes.InsertNode(New, InsertPos); 1279 1280 return QualType(New, 0); 1281} 1282 1283/// getRValueReferenceType - Return the uniqued reference to the type for an 1284/// rvalue reference to the specified type. 1285QualType ASTContext::getRValueReferenceType(QualType T) { 1286 // Unique pointers, to guarantee there is only one pointer of a particular 1287 // structure. 1288 llvm::FoldingSetNodeID ID; 1289 ReferenceType::Profile(ID, T, false); 1290 1291 void *InsertPos = 0; 1292 if (RValueReferenceType *RT = 1293 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1294 return QualType(RT, 0); 1295 1296 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1297 1298 // If the referencee type isn't canonical, this won't be a canonical type 1299 // either, so fill in the canonical type field. 1300 QualType Canonical; 1301 if (InnerRef || !T.isCanonical()) { 1302 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1303 Canonical = getRValueReferenceType(getCanonicalType(PointeeType)); 1304 1305 // Get the new insert position for the node we care about. 1306 RValueReferenceType *NewIP = 1307 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1308 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1309 } 1310 1311 RValueReferenceType *New 1312 = new (*this, TypeAlignment) RValueReferenceType(T, Canonical); 1313 Types.push_back(New); 1314 RValueReferenceTypes.InsertNode(New, InsertPos); 1315 return QualType(New, 0); 1316} 1317 1318/// getMemberPointerType - Return the uniqued reference to the type for a 1319/// member pointer to the specified type, in the specified class. 1320QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls) { 1321 // Unique pointers, to guarantee there is only one pointer of a particular 1322 // structure. 1323 llvm::FoldingSetNodeID ID; 1324 MemberPointerType::Profile(ID, T, Cls); 1325 1326 void *InsertPos = 0; 1327 if (MemberPointerType *PT = 1328 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1329 return QualType(PT, 0); 1330 1331 // If the pointee or class type isn't canonical, this won't be a canonical 1332 // type either, so fill in the canonical type field. 1333 QualType Canonical; 1334 if (!T.isCanonical() || !Cls->isCanonicalUnqualified()) { 1335 Canonical = getMemberPointerType(getCanonicalType(T),getCanonicalType(Cls)); 1336 1337 // Get the new insert position for the node we care about. 1338 MemberPointerType *NewIP = 1339 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1340 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1341 } 1342 MemberPointerType *New 1343 = new (*this, TypeAlignment) MemberPointerType(T, Cls, Canonical); 1344 Types.push_back(New); 1345 MemberPointerTypes.InsertNode(New, InsertPos); 1346 return QualType(New, 0); 1347} 1348 1349/// getConstantArrayType - Return the unique reference to the type for an 1350/// array of the specified element type. 1351QualType ASTContext::getConstantArrayType(QualType EltTy, 1352 const llvm::APInt &ArySizeIn, 1353 ArrayType::ArraySizeModifier ASM, 1354 unsigned EltTypeQuals) { 1355 assert((EltTy->isDependentType() || 1356 EltTy->isIncompleteType() || EltTy->isConstantSizeType()) && 1357 "Constant array of VLAs is illegal!"); 1358 1359 // Convert the array size into a canonical width matching the pointer size for 1360 // the target. 1361 llvm::APInt ArySize(ArySizeIn); 1362 ArySize.zextOrTrunc(Target.getPointerWidth(EltTy.getAddressSpace())); 1363 1364 llvm::FoldingSetNodeID ID; 1365 ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, EltTypeQuals); 1366 1367 void *InsertPos = 0; 1368 if (ConstantArrayType *ATP = 1369 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1370 return QualType(ATP, 0); 1371 1372 // If the element type isn't canonical, this won't be a canonical type either, 1373 // so fill in the canonical type field. 1374 QualType Canonical; 1375 if (!EltTy.isCanonical()) { 1376 Canonical = getConstantArrayType(getCanonicalType(EltTy), ArySize, 1377 ASM, EltTypeQuals); 1378 // Get the new insert position for the node we care about. 1379 ConstantArrayType *NewIP = 1380 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1381 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1382 } 1383 1384 ConstantArrayType *New = new(*this,TypeAlignment) 1385 ConstantArrayType(EltTy, Canonical, ArySize, ASM, EltTypeQuals); 1386 ConstantArrayTypes.InsertNode(New, InsertPos); 1387 Types.push_back(New); 1388 return QualType(New, 0); 1389} 1390 1391/// getVariableArrayType - Returns a non-unique reference to the type for a 1392/// variable array of the specified element type. 1393QualType ASTContext::getVariableArrayType(QualType EltTy, 1394 Expr *NumElts, 1395 ArrayType::ArraySizeModifier ASM, 1396 unsigned EltTypeQuals, 1397 SourceRange Brackets) { 1398 // Since we don't unique expressions, it isn't possible to unique VLA's 1399 // that have an expression provided for their size. 1400 QualType CanonType; 1401 1402 if (!EltTy.isCanonical()) { 1403 if (NumElts) 1404 NumElts->Retain(); 1405 CanonType = getVariableArrayType(getCanonicalType(EltTy), NumElts, ASM, 1406 EltTypeQuals, Brackets); 1407 } 1408 1409 VariableArrayType *New = new(*this, TypeAlignment) 1410 VariableArrayType(EltTy, CanonType, NumElts, ASM, EltTypeQuals, Brackets); 1411 1412 VariableArrayTypes.push_back(New); 1413 Types.push_back(New); 1414 return QualType(New, 0); 1415} 1416 1417/// getDependentSizedArrayType - Returns a non-unique reference to 1418/// the type for a dependently-sized array of the specified element 1419/// type. 1420QualType ASTContext::getDependentSizedArrayType(QualType EltTy, 1421 Expr *NumElts, 1422 ArrayType::ArraySizeModifier ASM, 1423 unsigned EltTypeQuals, 1424 SourceRange Brackets) { 1425 assert((!NumElts || NumElts->isTypeDependent() || 1426 NumElts->isValueDependent()) && 1427 "Size must be type- or value-dependent!"); 1428 1429 void *InsertPos = 0; 1430 DependentSizedArrayType *Canon = 0; 1431 llvm::FoldingSetNodeID ID; 1432 1433 if (NumElts) { 1434 // Dependently-sized array types that do not have a specified 1435 // number of elements will have their sizes deduced from an 1436 // initializer. 1437 DependentSizedArrayType::Profile(ID, *this, getCanonicalType(EltTy), ASM, 1438 EltTypeQuals, NumElts); 1439 1440 Canon = DependentSizedArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1441 } 1442 1443 DependentSizedArrayType *New; 1444 if (Canon) { 1445 // We already have a canonical version of this array type; use it as 1446 // the canonical type for a newly-built type. 1447 New = new (*this, TypeAlignment) 1448 DependentSizedArrayType(*this, EltTy, QualType(Canon, 0), 1449 NumElts, ASM, EltTypeQuals, Brackets); 1450 } else { 1451 QualType CanonEltTy = getCanonicalType(EltTy); 1452 if (CanonEltTy == EltTy) { 1453 New = new (*this, TypeAlignment) 1454 DependentSizedArrayType(*this, EltTy, QualType(), 1455 NumElts, ASM, EltTypeQuals, Brackets); 1456 1457 if (NumElts) { 1458 DependentSizedArrayType *CanonCheck 1459 = DependentSizedArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1460 assert(!CanonCheck && "Dependent-sized canonical array type broken"); 1461 (void)CanonCheck; 1462 DependentSizedArrayTypes.InsertNode(New, InsertPos); 1463 } 1464 } else { 1465 QualType Canon = getDependentSizedArrayType(CanonEltTy, NumElts, 1466 ASM, EltTypeQuals, 1467 SourceRange()); 1468 New = new (*this, TypeAlignment) 1469 DependentSizedArrayType(*this, EltTy, Canon, 1470 NumElts, ASM, EltTypeQuals, Brackets); 1471 } 1472 } 1473 1474 Types.push_back(New); 1475 return QualType(New, 0); 1476} 1477 1478QualType ASTContext::getIncompleteArrayType(QualType EltTy, 1479 ArrayType::ArraySizeModifier ASM, 1480 unsigned EltTypeQuals) { 1481 llvm::FoldingSetNodeID ID; 1482 IncompleteArrayType::Profile(ID, EltTy, ASM, EltTypeQuals); 1483 1484 void *InsertPos = 0; 1485 if (IncompleteArrayType *ATP = 1486 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1487 return QualType(ATP, 0); 1488 1489 // If the element type isn't canonical, this won't be a canonical type 1490 // either, so fill in the canonical type field. 1491 QualType Canonical; 1492 1493 if (!EltTy.isCanonical()) { 1494 Canonical = getIncompleteArrayType(getCanonicalType(EltTy), 1495 ASM, EltTypeQuals); 1496 1497 // Get the new insert position for the node we care about. 1498 IncompleteArrayType *NewIP = 1499 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1500 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1501 } 1502 1503 IncompleteArrayType *New = new (*this, TypeAlignment) 1504 IncompleteArrayType(EltTy, Canonical, ASM, EltTypeQuals); 1505 1506 IncompleteArrayTypes.InsertNode(New, InsertPos); 1507 Types.push_back(New); 1508 return QualType(New, 0); 1509} 1510 1511/// getVectorType - Return the unique reference to a vector type of 1512/// the specified element type and size. VectorType must be a built-in type. 1513QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts, 1514 bool IsAltiVec, bool IsPixel) { 1515 BuiltinType *baseType; 1516 1517 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1518 assert(baseType != 0 && "getVectorType(): Expecting a built-in type"); 1519 1520 // Check if we've already instantiated a vector of this type. 1521 llvm::FoldingSetNodeID ID; 1522 VectorType::Profile(ID, vecType, NumElts, Type::Vector, 1523 IsAltiVec, IsPixel); 1524 void *InsertPos = 0; 1525 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1526 return QualType(VTP, 0); 1527 1528 // If the element type isn't canonical, this won't be a canonical type either, 1529 // so fill in the canonical type field. 1530 QualType Canonical; 1531 if (!vecType.isCanonical() || IsAltiVec || IsPixel) { 1532 Canonical = getVectorType(getCanonicalType(vecType), 1533 NumElts, false, false); 1534 1535 // Get the new insert position for the node we care about. 1536 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1537 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1538 } 1539 VectorType *New = new (*this, TypeAlignment) 1540 VectorType(vecType, NumElts, Canonical, IsAltiVec, IsPixel); 1541 VectorTypes.InsertNode(New, InsertPos); 1542 Types.push_back(New); 1543 return QualType(New, 0); 1544} 1545 1546/// getExtVectorType - Return the unique reference to an extended vector type of 1547/// the specified element type and size. VectorType must be a built-in type. 1548QualType ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) { 1549 BuiltinType *baseType; 1550 1551 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1552 assert(baseType != 0 && "getExtVectorType(): Expecting a built-in type"); 1553 1554 // Check if we've already instantiated a vector of this type. 1555 llvm::FoldingSetNodeID ID; 1556 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector, false, false); 1557 void *InsertPos = 0; 1558 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1559 return QualType(VTP, 0); 1560 1561 // If the element type isn't canonical, this won't be a canonical type either, 1562 // so fill in the canonical type field. 1563 QualType Canonical; 1564 if (!vecType.isCanonical()) { 1565 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts); 1566 1567 // Get the new insert position for the node we care about. 1568 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1569 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1570 } 1571 ExtVectorType *New = new (*this, TypeAlignment) 1572 ExtVectorType(vecType, NumElts, Canonical); 1573 VectorTypes.InsertNode(New, InsertPos); 1574 Types.push_back(New); 1575 return QualType(New, 0); 1576} 1577 1578QualType ASTContext::getDependentSizedExtVectorType(QualType vecType, 1579 Expr *SizeExpr, 1580 SourceLocation AttrLoc) { 1581 llvm::FoldingSetNodeID ID; 1582 DependentSizedExtVectorType::Profile(ID, *this, getCanonicalType(vecType), 1583 SizeExpr); 1584 1585 void *InsertPos = 0; 1586 DependentSizedExtVectorType *Canon 1587 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1588 DependentSizedExtVectorType *New; 1589 if (Canon) { 1590 // We already have a canonical version of this array type; use it as 1591 // the canonical type for a newly-built type. 1592 New = new (*this, TypeAlignment) 1593 DependentSizedExtVectorType(*this, vecType, QualType(Canon, 0), 1594 SizeExpr, AttrLoc); 1595 } else { 1596 QualType CanonVecTy = getCanonicalType(vecType); 1597 if (CanonVecTy == vecType) { 1598 New = new (*this, TypeAlignment) 1599 DependentSizedExtVectorType(*this, vecType, QualType(), SizeExpr, 1600 AttrLoc); 1601 1602 DependentSizedExtVectorType *CanonCheck 1603 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1604 assert(!CanonCheck && "Dependent-sized ext_vector canonical type broken"); 1605 (void)CanonCheck; 1606 DependentSizedExtVectorTypes.InsertNode(New, InsertPos); 1607 } else { 1608 QualType Canon = getDependentSizedExtVectorType(CanonVecTy, SizeExpr, 1609 SourceLocation()); 1610 New = new (*this, TypeAlignment) 1611 DependentSizedExtVectorType(*this, vecType, Canon, SizeExpr, AttrLoc); 1612 } 1613 } 1614 1615 Types.push_back(New); 1616 return QualType(New, 0); 1617} 1618 1619/// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 1620/// 1621QualType ASTContext::getFunctionNoProtoType(QualType ResultTy, 1622 const FunctionType::ExtInfo &Info) { 1623 const CallingConv CallConv = Info.getCC(); 1624 // Unique functions, to guarantee there is only one function of a particular 1625 // structure. 1626 llvm::FoldingSetNodeID ID; 1627 FunctionNoProtoType::Profile(ID, ResultTy, Info); 1628 1629 void *InsertPos = 0; 1630 if (FunctionNoProtoType *FT = 1631 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1632 return QualType(FT, 0); 1633 1634 QualType Canonical; 1635 if (!ResultTy.isCanonical() || 1636 getCanonicalCallConv(CallConv) != CallConv) { 1637 Canonical = 1638 getFunctionNoProtoType(getCanonicalType(ResultTy), 1639 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1640 1641 // Get the new insert position for the node we care about. 1642 FunctionNoProtoType *NewIP = 1643 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1644 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1645 } 1646 1647 FunctionNoProtoType *New = new (*this, TypeAlignment) 1648 FunctionNoProtoType(ResultTy, Canonical, Info); 1649 Types.push_back(New); 1650 FunctionNoProtoTypes.InsertNode(New, InsertPos); 1651 return QualType(New, 0); 1652} 1653 1654/// getFunctionType - Return a normal function type with a typed argument 1655/// list. isVariadic indicates whether the argument list includes '...'. 1656QualType ASTContext::getFunctionType(QualType ResultTy,const QualType *ArgArray, 1657 unsigned NumArgs, bool isVariadic, 1658 unsigned TypeQuals, bool hasExceptionSpec, 1659 bool hasAnyExceptionSpec, unsigned NumExs, 1660 const QualType *ExArray, 1661 const FunctionType::ExtInfo &Info) { 1662 const CallingConv CallConv= Info.getCC(); 1663 // Unique functions, to guarantee there is only one function of a particular 1664 // structure. 1665 llvm::FoldingSetNodeID ID; 1666 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, isVariadic, 1667 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1668 NumExs, ExArray, Info); 1669 1670 void *InsertPos = 0; 1671 if (FunctionProtoType *FTP = 1672 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1673 return QualType(FTP, 0); 1674 1675 // Determine whether the type being created is already canonical or not. 1676 bool isCanonical = !hasExceptionSpec && ResultTy.isCanonical(); 1677 for (unsigned i = 0; i != NumArgs && isCanonical; ++i) 1678 if (!ArgArray[i].isCanonicalAsParam()) 1679 isCanonical = false; 1680 1681 // If this type isn't canonical, get the canonical version of it. 1682 // The exception spec is not part of the canonical type. 1683 QualType Canonical; 1684 if (!isCanonical || getCanonicalCallConv(CallConv) != CallConv) { 1685 llvm::SmallVector<QualType, 16> CanonicalArgs; 1686 CanonicalArgs.reserve(NumArgs); 1687 for (unsigned i = 0; i != NumArgs; ++i) 1688 CanonicalArgs.push_back(getCanonicalParamType(ArgArray[i])); 1689 1690 Canonical = getFunctionType(getCanonicalType(ResultTy), 1691 CanonicalArgs.data(), NumArgs, 1692 isVariadic, TypeQuals, false, 1693 false, 0, 0, 1694 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1695 1696 // Get the new insert position for the node we care about. 1697 FunctionProtoType *NewIP = 1698 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1699 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1700 } 1701 1702 // FunctionProtoType objects are allocated with extra bytes after them 1703 // for two variable size arrays (for parameter and exception types) at the 1704 // end of them. 1705 FunctionProtoType *FTP = 1706 (FunctionProtoType*)Allocate(sizeof(FunctionProtoType) + 1707 NumArgs*sizeof(QualType) + 1708 NumExs*sizeof(QualType), TypeAlignment); 1709 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, isVariadic, 1710 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1711 ExArray, NumExs, Canonical, Info); 1712 Types.push_back(FTP); 1713 FunctionProtoTypes.InsertNode(FTP, InsertPos); 1714 return QualType(FTP, 0); 1715} 1716 1717#ifndef NDEBUG 1718static bool NeedsInjectedClassNameType(const RecordDecl *D) { 1719 if (!isa<CXXRecordDecl>(D)) return false; 1720 const CXXRecordDecl *RD = cast<CXXRecordDecl>(D); 1721 if (isa<ClassTemplatePartialSpecializationDecl>(RD)) 1722 return true; 1723 if (RD->getDescribedClassTemplate() && 1724 !isa<ClassTemplateSpecializationDecl>(RD)) 1725 return true; 1726 return false; 1727} 1728#endif 1729 1730/// getInjectedClassNameType - Return the unique reference to the 1731/// injected class name type for the specified templated declaration. 1732QualType ASTContext::getInjectedClassNameType(CXXRecordDecl *Decl, 1733 QualType TST) { 1734 assert(NeedsInjectedClassNameType(Decl)); 1735 if (Decl->TypeForDecl) { 1736 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1737 } else if (CXXRecordDecl *PrevDecl 1738 = cast_or_null<CXXRecordDecl>(Decl->getPreviousDeclaration())) { 1739 assert(PrevDecl->TypeForDecl && "previous declaration has no type"); 1740 Decl->TypeForDecl = PrevDecl->TypeForDecl; 1741 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1742 } else { 1743 Decl->TypeForDecl = 1744 new (*this, TypeAlignment) InjectedClassNameType(Decl, TST); 1745 Types.push_back(Decl->TypeForDecl); 1746 } 1747 return QualType(Decl->TypeForDecl, 0); 1748} 1749 1750/// getTypeDeclType - Return the unique reference to the type for the 1751/// specified type declaration. 1752QualType ASTContext::getTypeDeclTypeSlow(const TypeDecl *Decl) { 1753 assert(Decl && "Passed null for Decl param"); 1754 assert(!Decl->TypeForDecl && "TypeForDecl present in slow case"); 1755 1756 if (const TypedefDecl *Typedef = dyn_cast<TypedefDecl>(Decl)) 1757 return getTypedefType(Typedef); 1758 1759 assert(!isa<TemplateTypeParmDecl>(Decl) && 1760 "Template type parameter types are always available."); 1761 1762 if (const RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) { 1763 assert(!Record->getPreviousDeclaration() && 1764 "struct/union has previous declaration"); 1765 assert(!NeedsInjectedClassNameType(Record)); 1766 Decl->TypeForDecl = new (*this, TypeAlignment) RecordType(Record); 1767 } else if (const EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) { 1768 assert(!Enum->getPreviousDeclaration() && 1769 "enum has previous declaration"); 1770 Decl->TypeForDecl = new (*this, TypeAlignment) EnumType(Enum); 1771 } else if (const UnresolvedUsingTypenameDecl *Using = 1772 dyn_cast<UnresolvedUsingTypenameDecl>(Decl)) { 1773 Decl->TypeForDecl = new (*this, TypeAlignment) UnresolvedUsingType(Using); 1774 } else 1775 llvm_unreachable("TypeDecl without a type?"); 1776 1777 Types.push_back(Decl->TypeForDecl); 1778 return QualType(Decl->TypeForDecl, 0); 1779} 1780 1781/// getTypedefType - Return the unique reference to the type for the 1782/// specified typename decl. 1783QualType ASTContext::getTypedefType(const TypedefDecl *Decl) { 1784 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1785 1786 QualType Canonical = getCanonicalType(Decl->getUnderlyingType()); 1787 Decl->TypeForDecl = new(*this, TypeAlignment) 1788 TypedefType(Type::Typedef, Decl, Canonical); 1789 Types.push_back(Decl->TypeForDecl); 1790 return QualType(Decl->TypeForDecl, 0); 1791} 1792 1793/// \brief Retrieve a substitution-result type. 1794QualType 1795ASTContext::getSubstTemplateTypeParmType(const TemplateTypeParmType *Parm, 1796 QualType Replacement) { 1797 assert(Replacement.isCanonical() 1798 && "replacement types must always be canonical"); 1799 1800 llvm::FoldingSetNodeID ID; 1801 SubstTemplateTypeParmType::Profile(ID, Parm, Replacement); 1802 void *InsertPos = 0; 1803 SubstTemplateTypeParmType *SubstParm 1804 = SubstTemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1805 1806 if (!SubstParm) { 1807 SubstParm = new (*this, TypeAlignment) 1808 SubstTemplateTypeParmType(Parm, Replacement); 1809 Types.push_back(SubstParm); 1810 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 1811 } 1812 1813 return QualType(SubstParm, 0); 1814} 1815 1816/// \brief Retrieve the template type parameter type for a template 1817/// parameter or parameter pack with the given depth, index, and (optionally) 1818/// name. 1819QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index, 1820 bool ParameterPack, 1821 IdentifierInfo *Name) { 1822 llvm::FoldingSetNodeID ID; 1823 TemplateTypeParmType::Profile(ID, Depth, Index, ParameterPack, Name); 1824 void *InsertPos = 0; 1825 TemplateTypeParmType *TypeParm 1826 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1827 1828 if (TypeParm) 1829 return QualType(TypeParm, 0); 1830 1831 if (Name) { 1832 QualType Canon = getTemplateTypeParmType(Depth, Index, ParameterPack); 1833 TypeParm = new (*this, TypeAlignment) 1834 TemplateTypeParmType(Depth, Index, ParameterPack, Name, Canon); 1835 1836 TemplateTypeParmType *TypeCheck 1837 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1838 assert(!TypeCheck && "Template type parameter canonical type broken"); 1839 (void)TypeCheck; 1840 } else 1841 TypeParm = new (*this, TypeAlignment) 1842 TemplateTypeParmType(Depth, Index, ParameterPack); 1843 1844 Types.push_back(TypeParm); 1845 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos); 1846 1847 return QualType(TypeParm, 0); 1848} 1849 1850TypeSourceInfo * 1851ASTContext::getTemplateSpecializationTypeInfo(TemplateName Name, 1852 SourceLocation NameLoc, 1853 const TemplateArgumentListInfo &Args, 1854 QualType CanonType) { 1855 QualType TST = getTemplateSpecializationType(Name, Args, CanonType); 1856 1857 TypeSourceInfo *DI = CreateTypeSourceInfo(TST); 1858 TemplateSpecializationTypeLoc TL 1859 = cast<TemplateSpecializationTypeLoc>(DI->getTypeLoc()); 1860 TL.setTemplateNameLoc(NameLoc); 1861 TL.setLAngleLoc(Args.getLAngleLoc()); 1862 TL.setRAngleLoc(Args.getRAngleLoc()); 1863 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 1864 TL.setArgLocInfo(i, Args[i].getLocInfo()); 1865 return DI; 1866} 1867 1868QualType 1869ASTContext::getTemplateSpecializationType(TemplateName Template, 1870 const TemplateArgumentListInfo &Args, 1871 QualType Canon) { 1872 unsigned NumArgs = Args.size(); 1873 1874 llvm::SmallVector<TemplateArgument, 4> ArgVec; 1875 ArgVec.reserve(NumArgs); 1876 for (unsigned i = 0; i != NumArgs; ++i) 1877 ArgVec.push_back(Args[i].getArgument()); 1878 1879 return getTemplateSpecializationType(Template, ArgVec.data(), NumArgs, 1880 Canon); 1881} 1882 1883QualType 1884ASTContext::getTemplateSpecializationType(TemplateName Template, 1885 const TemplateArgument *Args, 1886 unsigned NumArgs, 1887 QualType Canon) { 1888 if (!Canon.isNull()) 1889 Canon = getCanonicalType(Canon); 1890 else { 1891 // Build the canonical template specialization type. 1892 TemplateName CanonTemplate = getCanonicalTemplateName(Template); 1893 llvm::SmallVector<TemplateArgument, 4> CanonArgs; 1894 CanonArgs.reserve(NumArgs); 1895 for (unsigned I = 0; I != NumArgs; ++I) 1896 CanonArgs.push_back(getCanonicalTemplateArgument(Args[I])); 1897 1898 // Determine whether this canonical template specialization type already 1899 // exists. 1900 llvm::FoldingSetNodeID ID; 1901 TemplateSpecializationType::Profile(ID, CanonTemplate, 1902 CanonArgs.data(), NumArgs, *this); 1903 1904 void *InsertPos = 0; 1905 TemplateSpecializationType *Spec 1906 = TemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 1907 1908 if (!Spec) { 1909 // Allocate a new canonical template specialization type. 1910 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 1911 sizeof(TemplateArgument) * NumArgs), 1912 TypeAlignment); 1913 Spec = new (Mem) TemplateSpecializationType(CanonTemplate, 1914 CanonArgs.data(), NumArgs, 1915 Canon); 1916 Types.push_back(Spec); 1917 TemplateSpecializationTypes.InsertNode(Spec, InsertPos); 1918 } 1919 1920 if (Canon.isNull()) 1921 Canon = QualType(Spec, 0); 1922 assert(Canon->isDependentType() && 1923 "Non-dependent template-id type must have a canonical type"); 1924 } 1925 1926 // Allocate the (non-canonical) template specialization type, but don't 1927 // try to unique it: these types typically have location information that 1928 // we don't unique and don't want to lose. 1929 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 1930 sizeof(TemplateArgument) * NumArgs), 1931 TypeAlignment); 1932 TemplateSpecializationType *Spec 1933 = new (Mem) TemplateSpecializationType(Template, 1934 Args, NumArgs, 1935 Canon); 1936 1937 Types.push_back(Spec); 1938 return QualType(Spec, 0); 1939} 1940 1941QualType 1942ASTContext::getElaboratedType(ElaboratedTypeKeyword Keyword, 1943 NestedNameSpecifier *NNS, 1944 QualType NamedType) { 1945 llvm::FoldingSetNodeID ID; 1946 ElaboratedType::Profile(ID, Keyword, NNS, NamedType); 1947 1948 void *InsertPos = 0; 1949 ElaboratedType *T = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 1950 if (T) 1951 return QualType(T, 0); 1952 1953 QualType Canon = NamedType; 1954 if (!Canon.isCanonical()) { 1955 Canon = getCanonicalType(NamedType); 1956 ElaboratedType *CheckT = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 1957 assert(!CheckT && "Elaborated canonical type broken"); 1958 (void)CheckT; 1959 } 1960 1961 T = new (*this) ElaboratedType(Keyword, NNS, NamedType, Canon); 1962 Types.push_back(T); 1963 ElaboratedTypes.InsertNode(T, InsertPos); 1964 return QualType(T, 0); 1965} 1966 1967QualType ASTContext::getDependentNameType(ElaboratedTypeKeyword Keyword, 1968 NestedNameSpecifier *NNS, 1969 const IdentifierInfo *Name, 1970 QualType Canon) { 1971 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 1972 1973 if (Canon.isNull()) { 1974 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 1975 ElaboratedTypeKeyword CanonKeyword = Keyword; 1976 if (Keyword == ETK_None) 1977 CanonKeyword = ETK_Typename; 1978 1979 if (CanonNNS != NNS || CanonKeyword != Keyword) 1980 Canon = getDependentNameType(CanonKeyword, CanonNNS, Name); 1981 } 1982 1983 llvm::FoldingSetNodeID ID; 1984 DependentNameType::Profile(ID, Keyword, NNS, Name); 1985 1986 void *InsertPos = 0; 1987 DependentNameType *T 1988 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 1989 if (T) 1990 return QualType(T, 0); 1991 1992 T = new (*this) DependentNameType(Keyword, NNS, Name, Canon); 1993 Types.push_back(T); 1994 DependentNameTypes.InsertNode(T, InsertPos); 1995 return QualType(T, 0); 1996} 1997 1998QualType 1999ASTContext::getDependentTemplateSpecializationType( 2000 ElaboratedTypeKeyword Keyword, 2001 NestedNameSpecifier *NNS, 2002 const IdentifierInfo *Name, 2003 const TemplateArgumentListInfo &Args) { 2004 // TODO: avoid this copy 2005 llvm::SmallVector<TemplateArgument, 16> ArgCopy; 2006 for (unsigned I = 0, E = Args.size(); I != E; ++I) 2007 ArgCopy.push_back(Args[I].getArgument()); 2008 return getDependentTemplateSpecializationType(Keyword, NNS, Name, 2009 ArgCopy.size(), 2010 ArgCopy.data()); 2011} 2012 2013QualType 2014ASTContext::getDependentTemplateSpecializationType( 2015 ElaboratedTypeKeyword Keyword, 2016 NestedNameSpecifier *NNS, 2017 const IdentifierInfo *Name, 2018 unsigned NumArgs, 2019 const TemplateArgument *Args) { 2020 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 2021 2022 llvm::FoldingSetNodeID ID; 2023 DependentTemplateSpecializationType::Profile(ID, *this, Keyword, NNS, 2024 Name, NumArgs, Args); 2025 2026 void *InsertPos = 0; 2027 DependentTemplateSpecializationType *T 2028 = DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2029 if (T) 2030 return QualType(T, 0); 2031 2032 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2033 2034 ElaboratedTypeKeyword CanonKeyword = Keyword; 2035 if (Keyword == ETK_None) CanonKeyword = ETK_Typename; 2036 2037 bool AnyNonCanonArgs = false; 2038 llvm::SmallVector<TemplateArgument, 16> CanonArgs(NumArgs); 2039 for (unsigned I = 0; I != NumArgs; ++I) { 2040 CanonArgs[I] = getCanonicalTemplateArgument(Args[I]); 2041 if (!CanonArgs[I].structurallyEquals(Args[I])) 2042 AnyNonCanonArgs = true; 2043 } 2044 2045 QualType Canon; 2046 if (AnyNonCanonArgs || CanonNNS != NNS || CanonKeyword != Keyword) { 2047 Canon = getDependentTemplateSpecializationType(CanonKeyword, CanonNNS, 2048 Name, NumArgs, 2049 CanonArgs.data()); 2050 2051 // Find the insert position again. 2052 DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2053 } 2054 2055 void *Mem = Allocate((sizeof(DependentTemplateSpecializationType) + 2056 sizeof(TemplateArgument) * NumArgs), 2057 TypeAlignment); 2058 T = new (Mem) DependentTemplateSpecializationType(Keyword, NNS, 2059 Name, NumArgs, Args, Canon); 2060 Types.push_back(T); 2061 DependentTemplateSpecializationTypes.InsertNode(T, InsertPos); 2062 return QualType(T, 0); 2063} 2064 2065/// CmpProtocolNames - Comparison predicate for sorting protocols 2066/// alphabetically. 2067static bool CmpProtocolNames(const ObjCProtocolDecl *LHS, 2068 const ObjCProtocolDecl *RHS) { 2069 return LHS->getDeclName() < RHS->getDeclName(); 2070} 2071 2072static bool areSortedAndUniqued(ObjCProtocolDecl * const *Protocols, 2073 unsigned NumProtocols) { 2074 if (NumProtocols == 0) return true; 2075 2076 for (unsigned i = 1; i != NumProtocols; ++i) 2077 if (!CmpProtocolNames(Protocols[i-1], Protocols[i])) 2078 return false; 2079 return true; 2080} 2081 2082static void SortAndUniqueProtocols(ObjCProtocolDecl **Protocols, 2083 unsigned &NumProtocols) { 2084 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols; 2085 2086 // Sort protocols, keyed by name. 2087 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames); 2088 2089 // Remove duplicates. 2090 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd); 2091 NumProtocols = ProtocolsEnd-Protocols; 2092} 2093 2094QualType ASTContext::getObjCObjectType(QualType BaseType, 2095 ObjCProtocolDecl * const *Protocols, 2096 unsigned NumProtocols) { 2097 // If the base type is an interface and there aren't any protocols 2098 // to add, then the interface type will do just fine. 2099 if (!NumProtocols && isa<ObjCInterfaceType>(BaseType)) 2100 return BaseType; 2101 2102 // Look in the folding set for an existing type. 2103 llvm::FoldingSetNodeID ID; 2104 ObjCObjectTypeImpl::Profile(ID, BaseType, Protocols, NumProtocols); 2105 void *InsertPos = 0; 2106 if (ObjCObjectType *QT = ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos)) 2107 return QualType(QT, 0); 2108 2109 // Build the canonical type, which has the canonical base type and 2110 // a sorted-and-uniqued list of protocols. 2111 QualType Canonical; 2112 bool ProtocolsSorted = areSortedAndUniqued(Protocols, NumProtocols); 2113 if (!ProtocolsSorted || !BaseType.isCanonical()) { 2114 if (!ProtocolsSorted) { 2115 llvm::SmallVector<ObjCProtocolDecl*, 8> Sorted(Protocols, 2116 Protocols + NumProtocols); 2117 unsigned UniqueCount = NumProtocols; 2118 2119 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2120 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2121 &Sorted[0], UniqueCount); 2122 } else { 2123 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2124 Protocols, NumProtocols); 2125 } 2126 2127 // Regenerate InsertPos. 2128 ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos); 2129 } 2130 2131 unsigned Size = sizeof(ObjCObjectTypeImpl); 2132 Size += NumProtocols * sizeof(ObjCProtocolDecl *); 2133 void *Mem = Allocate(Size, TypeAlignment); 2134 ObjCObjectTypeImpl *T = 2135 new (Mem) ObjCObjectTypeImpl(Canonical, BaseType, Protocols, NumProtocols); 2136 2137 Types.push_back(T); 2138 ObjCObjectTypes.InsertNode(T, InsertPos); 2139 return QualType(T, 0); 2140} 2141 2142/// getObjCObjectPointerType - Return a ObjCObjectPointerType type for 2143/// the given object type. 2144QualType ASTContext::getObjCObjectPointerType(QualType ObjectT) { 2145 llvm::FoldingSetNodeID ID; 2146 ObjCObjectPointerType::Profile(ID, ObjectT); 2147 2148 void *InsertPos = 0; 2149 if (ObjCObjectPointerType *QT = 2150 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 2151 return QualType(QT, 0); 2152 2153 // Find the canonical object type. 2154 QualType Canonical; 2155 if (!ObjectT.isCanonical()) { 2156 Canonical = getObjCObjectPointerType(getCanonicalType(ObjectT)); 2157 2158 // Regenerate InsertPos. 2159 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 2160 } 2161 2162 // No match. 2163 void *Mem = Allocate(sizeof(ObjCObjectPointerType), TypeAlignment); 2164 ObjCObjectPointerType *QType = 2165 new (Mem) ObjCObjectPointerType(Canonical, ObjectT); 2166 2167 Types.push_back(QType); 2168 ObjCObjectPointerTypes.InsertNode(QType, InsertPos); 2169 return QualType(QType, 0); 2170} 2171 2172/// getObjCInterfaceType - Return the unique reference to the type for the 2173/// specified ObjC interface decl. The list of protocols is optional. 2174QualType ASTContext::getObjCInterfaceType(const ObjCInterfaceDecl *Decl) { 2175 if (Decl->TypeForDecl) 2176 return QualType(Decl->TypeForDecl, 0); 2177 2178 // FIXME: redeclarations? 2179 void *Mem = Allocate(sizeof(ObjCInterfaceType), TypeAlignment); 2180 ObjCInterfaceType *T = new (Mem) ObjCInterfaceType(Decl); 2181 Decl->TypeForDecl = T; 2182 Types.push_back(T); 2183 return QualType(T, 0); 2184} 2185 2186/// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique 2187/// TypeOfExprType AST's (since expression's are never shared). For example, 2188/// multiple declarations that refer to "typeof(x)" all contain different 2189/// DeclRefExpr's. This doesn't effect the type checker, since it operates 2190/// on canonical type's (which are always unique). 2191QualType ASTContext::getTypeOfExprType(Expr *tofExpr) { 2192 TypeOfExprType *toe; 2193 if (tofExpr->isTypeDependent()) { 2194 llvm::FoldingSetNodeID ID; 2195 DependentTypeOfExprType::Profile(ID, *this, tofExpr); 2196 2197 void *InsertPos = 0; 2198 DependentTypeOfExprType *Canon 2199 = DependentTypeOfExprTypes.FindNodeOrInsertPos(ID, InsertPos); 2200 if (Canon) { 2201 // We already have a "canonical" version of an identical, dependent 2202 // typeof(expr) type. Use that as our canonical type. 2203 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, 2204 QualType((TypeOfExprType*)Canon, 0)); 2205 } 2206 else { 2207 // Build a new, canonical typeof(expr) type. 2208 Canon 2209 = new (*this, TypeAlignment) DependentTypeOfExprType(*this, tofExpr); 2210 DependentTypeOfExprTypes.InsertNode(Canon, InsertPos); 2211 toe = Canon; 2212 } 2213 } else { 2214 QualType Canonical = getCanonicalType(tofExpr->getType()); 2215 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, Canonical); 2216 } 2217 Types.push_back(toe); 2218 return QualType(toe, 0); 2219} 2220 2221/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique 2222/// TypeOfType AST's. The only motivation to unique these nodes would be 2223/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be 2224/// an issue. This doesn't effect the type checker, since it operates 2225/// on canonical type's (which are always unique). 2226QualType ASTContext::getTypeOfType(QualType tofType) { 2227 QualType Canonical = getCanonicalType(tofType); 2228 TypeOfType *tot = new (*this, TypeAlignment) TypeOfType(tofType, Canonical); 2229 Types.push_back(tot); 2230 return QualType(tot, 0); 2231} 2232 2233/// getDecltypeForExpr - Given an expr, will return the decltype for that 2234/// expression, according to the rules in C++0x [dcl.type.simple]p4 2235static QualType getDecltypeForExpr(const Expr *e, ASTContext &Context) { 2236 if (e->isTypeDependent()) 2237 return Context.DependentTy; 2238 2239 // If e is an id expression or a class member access, decltype(e) is defined 2240 // as the type of the entity named by e. 2241 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(e)) { 2242 if (const ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl())) 2243 return VD->getType(); 2244 } 2245 if (const MemberExpr *ME = dyn_cast<MemberExpr>(e)) { 2246 if (const FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) 2247 return FD->getType(); 2248 } 2249 // If e is a function call or an invocation of an overloaded operator, 2250 // (parentheses around e are ignored), decltype(e) is defined as the 2251 // return type of that function. 2252 if (const CallExpr *CE = dyn_cast<CallExpr>(e->IgnoreParens())) 2253 return CE->getCallReturnType(); 2254 2255 QualType T = e->getType(); 2256 2257 // Otherwise, where T is the type of e, if e is an lvalue, decltype(e) is 2258 // defined as T&, otherwise decltype(e) is defined as T. 2259 if (e->isLvalue(Context) == Expr::LV_Valid) 2260 T = Context.getLValueReferenceType(T); 2261 2262 return T; 2263} 2264 2265/// getDecltypeType - Unlike many "get<Type>" functions, we don't unique 2266/// DecltypeType AST's. The only motivation to unique these nodes would be 2267/// memory savings. Since decltype(t) is fairly uncommon, space shouldn't be 2268/// an issue. This doesn't effect the type checker, since it operates 2269/// on canonical type's (which are always unique). 2270QualType ASTContext::getDecltypeType(Expr *e) { 2271 DecltypeType *dt; 2272 if (e->isTypeDependent()) { 2273 llvm::FoldingSetNodeID ID; 2274 DependentDecltypeType::Profile(ID, *this, e); 2275 2276 void *InsertPos = 0; 2277 DependentDecltypeType *Canon 2278 = DependentDecltypeTypes.FindNodeOrInsertPos(ID, InsertPos); 2279 if (Canon) { 2280 // We already have a "canonical" version of an equivalent, dependent 2281 // decltype type. Use that as our canonical type. 2282 dt = new (*this, TypeAlignment) DecltypeType(e, DependentTy, 2283 QualType((DecltypeType*)Canon, 0)); 2284 } 2285 else { 2286 // Build a new, canonical typeof(expr) type. 2287 Canon = new (*this, TypeAlignment) DependentDecltypeType(*this, e); 2288 DependentDecltypeTypes.InsertNode(Canon, InsertPos); 2289 dt = Canon; 2290 } 2291 } else { 2292 QualType T = getDecltypeForExpr(e, *this); 2293 dt = new (*this, TypeAlignment) DecltypeType(e, T, getCanonicalType(T)); 2294 } 2295 Types.push_back(dt); 2296 return QualType(dt, 0); 2297} 2298 2299/// getTagDeclType - Return the unique reference to the type for the 2300/// specified TagDecl (struct/union/class/enum) decl. 2301QualType ASTContext::getTagDeclType(const TagDecl *Decl) { 2302 assert (Decl); 2303 // FIXME: What is the design on getTagDeclType when it requires casting 2304 // away const? mutable? 2305 return getTypeDeclType(const_cast<TagDecl*>(Decl)); 2306} 2307 2308/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result 2309/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and 2310/// needs to agree with the definition in <stddef.h>. 2311CanQualType ASTContext::getSizeType() const { 2312 return getFromTargetType(Target.getSizeType()); 2313} 2314 2315/// getSignedWCharType - Return the type of "signed wchar_t". 2316/// Used when in C++, as a GCC extension. 2317QualType ASTContext::getSignedWCharType() const { 2318 // FIXME: derive from "Target" ? 2319 return WCharTy; 2320} 2321 2322/// getUnsignedWCharType - Return the type of "unsigned wchar_t". 2323/// Used when in C++, as a GCC extension. 2324QualType ASTContext::getUnsignedWCharType() const { 2325 // FIXME: derive from "Target" ? 2326 return UnsignedIntTy; 2327} 2328 2329/// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 2330/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 2331QualType ASTContext::getPointerDiffType() const { 2332 return getFromTargetType(Target.getPtrDiffType(0)); 2333} 2334 2335//===----------------------------------------------------------------------===// 2336// Type Operators 2337//===----------------------------------------------------------------------===// 2338 2339CanQualType ASTContext::getCanonicalParamType(QualType T) { 2340 // Push qualifiers into arrays, and then discard any remaining 2341 // qualifiers. 2342 T = getCanonicalType(T); 2343 const Type *Ty = T.getTypePtr(); 2344 2345 QualType Result; 2346 if (isa<ArrayType>(Ty)) { 2347 Result = getArrayDecayedType(QualType(Ty,0)); 2348 } else if (isa<FunctionType>(Ty)) { 2349 Result = getPointerType(QualType(Ty, 0)); 2350 } else { 2351 Result = QualType(Ty, 0); 2352 } 2353 2354 return CanQualType::CreateUnsafe(Result); 2355} 2356 2357/// getCanonicalType - Return the canonical (structural) type corresponding to 2358/// the specified potentially non-canonical type. The non-canonical version 2359/// of a type may have many "decorated" versions of types. Decorators can 2360/// include typedefs, 'typeof' operators, etc. The returned type is guaranteed 2361/// to be free of any of these, allowing two canonical types to be compared 2362/// for exact equality with a simple pointer comparison. 2363CanQualType ASTContext::getCanonicalType(QualType T) { 2364 QualifierCollector Quals; 2365 const Type *Ptr = Quals.strip(T); 2366 QualType CanType = Ptr->getCanonicalTypeInternal(); 2367 2368 // The canonical internal type will be the canonical type *except* 2369 // that we push type qualifiers down through array types. 2370 2371 // If there are no new qualifiers to push down, stop here. 2372 if (!Quals.hasQualifiers()) 2373 return CanQualType::CreateUnsafe(CanType); 2374 2375 // If the type qualifiers are on an array type, get the canonical 2376 // type of the array with the qualifiers applied to the element 2377 // type. 2378 ArrayType *AT = dyn_cast<ArrayType>(CanType); 2379 if (!AT) 2380 return CanQualType::CreateUnsafe(getQualifiedType(CanType, Quals)); 2381 2382 // Get the canonical version of the element with the extra qualifiers on it. 2383 // This can recursively sink qualifiers through multiple levels of arrays. 2384 QualType NewEltTy = getQualifiedType(AT->getElementType(), Quals); 2385 NewEltTy = getCanonicalType(NewEltTy); 2386 2387 if (ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 2388 return CanQualType::CreateUnsafe( 2389 getConstantArrayType(NewEltTy, CAT->getSize(), 2390 CAT->getSizeModifier(), 2391 CAT->getIndexTypeCVRQualifiers())); 2392 if (IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) 2393 return CanQualType::CreateUnsafe( 2394 getIncompleteArrayType(NewEltTy, IAT->getSizeModifier(), 2395 IAT->getIndexTypeCVRQualifiers())); 2396 2397 if (DependentSizedArrayType *DSAT = dyn_cast<DependentSizedArrayType>(AT)) 2398 return CanQualType::CreateUnsafe( 2399 getDependentSizedArrayType(NewEltTy, 2400 DSAT->getSizeExpr() ? 2401 DSAT->getSizeExpr()->Retain() : 0, 2402 DSAT->getSizeModifier(), 2403 DSAT->getIndexTypeCVRQualifiers(), 2404 DSAT->getBracketsRange())->getCanonicalTypeInternal()); 2405 2406 VariableArrayType *VAT = cast<VariableArrayType>(AT); 2407 return CanQualType::CreateUnsafe(getVariableArrayType(NewEltTy, 2408 VAT->getSizeExpr() ? 2409 VAT->getSizeExpr()->Retain() : 0, 2410 VAT->getSizeModifier(), 2411 VAT->getIndexTypeCVRQualifiers(), 2412 VAT->getBracketsRange())); 2413} 2414 2415QualType ASTContext::getUnqualifiedArrayType(QualType T, 2416 Qualifiers &Quals) { 2417 Quals = T.getQualifiers(); 2418 const ArrayType *AT = getAsArrayType(T); 2419 if (!AT) { 2420 return T.getUnqualifiedType(); 2421 } 2422 2423 QualType Elt = AT->getElementType(); 2424 QualType UnqualElt = getUnqualifiedArrayType(Elt, Quals); 2425 if (Elt == UnqualElt) 2426 return T; 2427 2428 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) { 2429 return getConstantArrayType(UnqualElt, CAT->getSize(), 2430 CAT->getSizeModifier(), 0); 2431 } 2432 2433 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) { 2434 return getIncompleteArrayType(UnqualElt, IAT->getSizeModifier(), 0); 2435 } 2436 2437 if (const VariableArrayType *VAT = dyn_cast<VariableArrayType>(AT)) { 2438 return getVariableArrayType(UnqualElt, 2439 VAT->getSizeExpr() ? 2440 VAT->getSizeExpr()->Retain() : 0, 2441 VAT->getSizeModifier(), 2442 VAT->getIndexTypeCVRQualifiers(), 2443 VAT->getBracketsRange()); 2444 } 2445 2446 const DependentSizedArrayType *DSAT = cast<DependentSizedArrayType>(AT); 2447 return getDependentSizedArrayType(UnqualElt, DSAT->getSizeExpr()->Retain(), 2448 DSAT->getSizeModifier(), 0, 2449 SourceRange()); 2450} 2451 2452/// UnwrapSimilarPointerTypes - If T1 and T2 are pointer types that 2453/// may be similar (C++ 4.4), replaces T1 and T2 with the type that 2454/// they point to and return true. If T1 and T2 aren't pointer types 2455/// or pointer-to-member types, or if they are not similar at this 2456/// level, returns false and leaves T1 and T2 unchanged. Top-level 2457/// qualifiers on T1 and T2 are ignored. This function will typically 2458/// be called in a loop that successively "unwraps" pointer and 2459/// pointer-to-member types to compare them at each level. 2460bool ASTContext::UnwrapSimilarPointerTypes(QualType &T1, QualType &T2) { 2461 const PointerType *T1PtrType = T1->getAs<PointerType>(), 2462 *T2PtrType = T2->getAs<PointerType>(); 2463 if (T1PtrType && T2PtrType) { 2464 T1 = T1PtrType->getPointeeType(); 2465 T2 = T2PtrType->getPointeeType(); 2466 return true; 2467 } 2468 2469 const MemberPointerType *T1MPType = T1->getAs<MemberPointerType>(), 2470 *T2MPType = T2->getAs<MemberPointerType>(); 2471 if (T1MPType && T2MPType && 2472 hasSameUnqualifiedType(QualType(T1MPType->getClass(), 0), 2473 QualType(T2MPType->getClass(), 0))) { 2474 T1 = T1MPType->getPointeeType(); 2475 T2 = T2MPType->getPointeeType(); 2476 return true; 2477 } 2478 2479 if (getLangOptions().ObjC1) { 2480 const ObjCObjectPointerType *T1OPType = T1->getAs<ObjCObjectPointerType>(), 2481 *T2OPType = T2->getAs<ObjCObjectPointerType>(); 2482 if (T1OPType && T2OPType) { 2483 T1 = T1OPType->getPointeeType(); 2484 T2 = T2OPType->getPointeeType(); 2485 return true; 2486 } 2487 } 2488 2489 // FIXME: Block pointers, too? 2490 2491 return false; 2492} 2493 2494DeclarationName ASTContext::getNameForTemplate(TemplateName Name) { 2495 if (TemplateDecl *TD = Name.getAsTemplateDecl()) 2496 return TD->getDeclName(); 2497 2498 if (DependentTemplateName *DTN = Name.getAsDependentTemplateName()) { 2499 if (DTN->isIdentifier()) { 2500 return DeclarationNames.getIdentifier(DTN->getIdentifier()); 2501 } else { 2502 return DeclarationNames.getCXXOperatorName(DTN->getOperator()); 2503 } 2504 } 2505 2506 OverloadedTemplateStorage *Storage = Name.getAsOverloadedTemplate(); 2507 assert(Storage); 2508 return (*Storage->begin())->getDeclName(); 2509} 2510 2511TemplateName ASTContext::getCanonicalTemplateName(TemplateName Name) { 2512 if (TemplateDecl *Template = Name.getAsTemplateDecl()) { 2513 if (TemplateTemplateParmDecl *TTP 2514 = dyn_cast<TemplateTemplateParmDecl>(Template)) 2515 Template = getCanonicalTemplateTemplateParmDecl(TTP); 2516 2517 // The canonical template name is the canonical template declaration. 2518 return TemplateName(cast<TemplateDecl>(Template->getCanonicalDecl())); 2519 } 2520 2521 assert(!Name.getAsOverloadedTemplate()); 2522 2523 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 2524 assert(DTN && "Non-dependent template names must refer to template decls."); 2525 return DTN->CanonicalTemplateName; 2526} 2527 2528bool ASTContext::hasSameTemplateName(TemplateName X, TemplateName Y) { 2529 X = getCanonicalTemplateName(X); 2530 Y = getCanonicalTemplateName(Y); 2531 return X.getAsVoidPointer() == Y.getAsVoidPointer(); 2532} 2533 2534TemplateArgument 2535ASTContext::getCanonicalTemplateArgument(const TemplateArgument &Arg) { 2536 switch (Arg.getKind()) { 2537 case TemplateArgument::Null: 2538 return Arg; 2539 2540 case TemplateArgument::Expression: 2541 return Arg; 2542 2543 case TemplateArgument::Declaration: 2544 return TemplateArgument(Arg.getAsDecl()->getCanonicalDecl()); 2545 2546 case TemplateArgument::Template: 2547 return TemplateArgument(getCanonicalTemplateName(Arg.getAsTemplate())); 2548 2549 case TemplateArgument::Integral: 2550 return TemplateArgument(*Arg.getAsIntegral(), 2551 getCanonicalType(Arg.getIntegralType())); 2552 2553 case TemplateArgument::Type: 2554 return TemplateArgument(getCanonicalType(Arg.getAsType())); 2555 2556 case TemplateArgument::Pack: { 2557 // FIXME: Allocate in ASTContext 2558 TemplateArgument *CanonArgs = new TemplateArgument[Arg.pack_size()]; 2559 unsigned Idx = 0; 2560 for (TemplateArgument::pack_iterator A = Arg.pack_begin(), 2561 AEnd = Arg.pack_end(); 2562 A != AEnd; (void)++A, ++Idx) 2563 CanonArgs[Idx] = getCanonicalTemplateArgument(*A); 2564 2565 TemplateArgument Result; 2566 Result.setArgumentPack(CanonArgs, Arg.pack_size(), false); 2567 return Result; 2568 } 2569 } 2570 2571 // Silence GCC warning 2572 assert(false && "Unhandled template argument kind"); 2573 return TemplateArgument(); 2574} 2575 2576NestedNameSpecifier * 2577ASTContext::getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) { 2578 if (!NNS) 2579 return 0; 2580 2581 switch (NNS->getKind()) { 2582 case NestedNameSpecifier::Identifier: 2583 // Canonicalize the prefix but keep the identifier the same. 2584 return NestedNameSpecifier::Create(*this, 2585 getCanonicalNestedNameSpecifier(NNS->getPrefix()), 2586 NNS->getAsIdentifier()); 2587 2588 case NestedNameSpecifier::Namespace: 2589 // A namespace is canonical; build a nested-name-specifier with 2590 // this namespace and no prefix. 2591 return NestedNameSpecifier::Create(*this, 0, NNS->getAsNamespace()); 2592 2593 case NestedNameSpecifier::TypeSpec: 2594 case NestedNameSpecifier::TypeSpecWithTemplate: { 2595 QualType T = getCanonicalType(QualType(NNS->getAsType(), 0)); 2596 return NestedNameSpecifier::Create(*this, 0, 2597 NNS->getKind() == NestedNameSpecifier::TypeSpecWithTemplate, 2598 T.getTypePtr()); 2599 } 2600 2601 case NestedNameSpecifier::Global: 2602 // The global specifier is canonical and unique. 2603 return NNS; 2604 } 2605 2606 // Required to silence a GCC warning 2607 return 0; 2608} 2609 2610 2611const ArrayType *ASTContext::getAsArrayType(QualType T) { 2612 // Handle the non-qualified case efficiently. 2613 if (!T.hasLocalQualifiers()) { 2614 // Handle the common positive case fast. 2615 if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 2616 return AT; 2617 } 2618 2619 // Handle the common negative case fast. 2620 QualType CType = T->getCanonicalTypeInternal(); 2621 if (!isa<ArrayType>(CType)) 2622 return 0; 2623 2624 // Apply any qualifiers from the array type to the element type. This 2625 // implements C99 6.7.3p8: "If the specification of an array type includes 2626 // any type qualifiers, the element type is so qualified, not the array type." 2627 2628 // If we get here, we either have type qualifiers on the type, or we have 2629 // sugar such as a typedef in the way. If we have type qualifiers on the type 2630 // we must propagate them down into the element type. 2631 2632 QualifierCollector Qs; 2633 const Type *Ty = Qs.strip(T.getDesugaredType()); 2634 2635 // If we have a simple case, just return now. 2636 const ArrayType *ATy = dyn_cast<ArrayType>(Ty); 2637 if (ATy == 0 || Qs.empty()) 2638 return ATy; 2639 2640 // Otherwise, we have an array and we have qualifiers on it. Push the 2641 // qualifiers into the array element type and return a new array type. 2642 // Get the canonical version of the element with the extra qualifiers on it. 2643 // This can recursively sink qualifiers through multiple levels of arrays. 2644 QualType NewEltTy = getQualifiedType(ATy->getElementType(), Qs); 2645 2646 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy)) 2647 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(), 2648 CAT->getSizeModifier(), 2649 CAT->getIndexTypeCVRQualifiers())); 2650 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy)) 2651 return cast<ArrayType>(getIncompleteArrayType(NewEltTy, 2652 IAT->getSizeModifier(), 2653 IAT->getIndexTypeCVRQualifiers())); 2654 2655 if (const DependentSizedArrayType *DSAT 2656 = dyn_cast<DependentSizedArrayType>(ATy)) 2657 return cast<ArrayType>( 2658 getDependentSizedArrayType(NewEltTy, 2659 DSAT->getSizeExpr() ? 2660 DSAT->getSizeExpr()->Retain() : 0, 2661 DSAT->getSizeModifier(), 2662 DSAT->getIndexTypeCVRQualifiers(), 2663 DSAT->getBracketsRange())); 2664 2665 const VariableArrayType *VAT = cast<VariableArrayType>(ATy); 2666 return cast<ArrayType>(getVariableArrayType(NewEltTy, 2667 VAT->getSizeExpr() ? 2668 VAT->getSizeExpr()->Retain() : 0, 2669 VAT->getSizeModifier(), 2670 VAT->getIndexTypeCVRQualifiers(), 2671 VAT->getBracketsRange())); 2672} 2673 2674 2675/// getArrayDecayedType - Return the properly qualified result of decaying the 2676/// specified array type to a pointer. This operation is non-trivial when 2677/// handling typedefs etc. The canonical type of "T" must be an array type, 2678/// this returns a pointer to a properly qualified element of the array. 2679/// 2680/// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 2681QualType ASTContext::getArrayDecayedType(QualType Ty) { 2682 // Get the element type with 'getAsArrayType' so that we don't lose any 2683 // typedefs in the element type of the array. This also handles propagation 2684 // of type qualifiers from the array type into the element type if present 2685 // (C99 6.7.3p8). 2686 const ArrayType *PrettyArrayType = getAsArrayType(Ty); 2687 assert(PrettyArrayType && "Not an array type!"); 2688 2689 QualType PtrTy = getPointerType(PrettyArrayType->getElementType()); 2690 2691 // int x[restrict 4] -> int *restrict 2692 return getQualifiedType(PtrTy, PrettyArrayType->getIndexTypeQualifiers()); 2693} 2694 2695QualType ASTContext::getBaseElementType(QualType QT) { 2696 QualifierCollector Qs; 2697 while (const ArrayType *AT = getAsArrayType(QualType(Qs.strip(QT), 0))) 2698 QT = AT->getElementType(); 2699 return Qs.apply(QT); 2700} 2701 2702QualType ASTContext::getBaseElementType(const ArrayType *AT) { 2703 QualType ElemTy = AT->getElementType(); 2704 2705 if (const ArrayType *AT = getAsArrayType(ElemTy)) 2706 return getBaseElementType(AT); 2707 2708 return ElemTy; 2709} 2710 2711/// getConstantArrayElementCount - Returns number of constant array elements. 2712uint64_t 2713ASTContext::getConstantArrayElementCount(const ConstantArrayType *CA) const { 2714 uint64_t ElementCount = 1; 2715 do { 2716 ElementCount *= CA->getSize().getZExtValue(); 2717 CA = dyn_cast<ConstantArrayType>(CA->getElementType()); 2718 } while (CA); 2719 return ElementCount; 2720} 2721 2722/// getFloatingRank - Return a relative rank for floating point types. 2723/// This routine will assert if passed a built-in type that isn't a float. 2724static FloatingRank getFloatingRank(QualType T) { 2725 if (const ComplexType *CT = T->getAs<ComplexType>()) 2726 return getFloatingRank(CT->getElementType()); 2727 2728 assert(T->getAs<BuiltinType>() && "getFloatingRank(): not a floating type"); 2729 switch (T->getAs<BuiltinType>()->getKind()) { 2730 default: assert(0 && "getFloatingRank(): not a floating type"); 2731 case BuiltinType::Float: return FloatRank; 2732 case BuiltinType::Double: return DoubleRank; 2733 case BuiltinType::LongDouble: return LongDoubleRank; 2734 } 2735} 2736 2737/// getFloatingTypeOfSizeWithinDomain - Returns a real floating 2738/// point or a complex type (based on typeDomain/typeSize). 2739/// 'typeDomain' is a real floating point or complex type. 2740/// 'typeSize' is a real floating point or complex type. 2741QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size, 2742 QualType Domain) const { 2743 FloatingRank EltRank = getFloatingRank(Size); 2744 if (Domain->isComplexType()) { 2745 switch (EltRank) { 2746 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2747 case FloatRank: return FloatComplexTy; 2748 case DoubleRank: return DoubleComplexTy; 2749 case LongDoubleRank: return LongDoubleComplexTy; 2750 } 2751 } 2752 2753 assert(Domain->isRealFloatingType() && "Unknown domain!"); 2754 switch (EltRank) { 2755 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2756 case FloatRank: return FloatTy; 2757 case DoubleRank: return DoubleTy; 2758 case LongDoubleRank: return LongDoubleTy; 2759 } 2760} 2761 2762/// getFloatingTypeOrder - Compare the rank of the two specified floating 2763/// point types, ignoring the domain of the type (i.e. 'double' == 2764/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 2765/// LHS < RHS, return -1. 2766int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) { 2767 FloatingRank LHSR = getFloatingRank(LHS); 2768 FloatingRank RHSR = getFloatingRank(RHS); 2769 2770 if (LHSR == RHSR) 2771 return 0; 2772 if (LHSR > RHSR) 2773 return 1; 2774 return -1; 2775} 2776 2777/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This 2778/// routine will assert if passed a built-in type that isn't an integer or enum, 2779/// or if it is not canonicalized. 2780unsigned ASTContext::getIntegerRank(Type *T) { 2781 assert(T->isCanonicalUnqualified() && "T should be canonicalized"); 2782 if (EnumType* ET = dyn_cast<EnumType>(T)) 2783 T = ET->getDecl()->getPromotionType().getTypePtr(); 2784 2785 if (T->isSpecificBuiltinType(BuiltinType::WChar)) 2786 T = getFromTargetType(Target.getWCharType()).getTypePtr(); 2787 2788 if (T->isSpecificBuiltinType(BuiltinType::Char16)) 2789 T = getFromTargetType(Target.getChar16Type()).getTypePtr(); 2790 2791 if (T->isSpecificBuiltinType(BuiltinType::Char32)) 2792 T = getFromTargetType(Target.getChar32Type()).getTypePtr(); 2793 2794 switch (cast<BuiltinType>(T)->getKind()) { 2795 default: assert(0 && "getIntegerRank(): not a built-in integer"); 2796 case BuiltinType::Bool: 2797 return 1 + (getIntWidth(BoolTy) << 3); 2798 case BuiltinType::Char_S: 2799 case BuiltinType::Char_U: 2800 case BuiltinType::SChar: 2801 case BuiltinType::UChar: 2802 return 2 + (getIntWidth(CharTy) << 3); 2803 case BuiltinType::Short: 2804 case BuiltinType::UShort: 2805 return 3 + (getIntWidth(ShortTy) << 3); 2806 case BuiltinType::Int: 2807 case BuiltinType::UInt: 2808 return 4 + (getIntWidth(IntTy) << 3); 2809 case BuiltinType::Long: 2810 case BuiltinType::ULong: 2811 return 5 + (getIntWidth(LongTy) << 3); 2812 case BuiltinType::LongLong: 2813 case BuiltinType::ULongLong: 2814 return 6 + (getIntWidth(LongLongTy) << 3); 2815 case BuiltinType::Int128: 2816 case BuiltinType::UInt128: 2817 return 7 + (getIntWidth(Int128Ty) << 3); 2818 } 2819} 2820 2821/// \brief Whether this is a promotable bitfield reference according 2822/// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 2823/// 2824/// \returns the type this bit-field will promote to, or NULL if no 2825/// promotion occurs. 2826QualType ASTContext::isPromotableBitField(Expr *E) { 2827 if (E->isTypeDependent() || E->isValueDependent()) 2828 return QualType(); 2829 2830 FieldDecl *Field = E->getBitField(); 2831 if (!Field) 2832 return QualType(); 2833 2834 QualType FT = Field->getType(); 2835 2836 llvm::APSInt BitWidthAP = Field->getBitWidth()->EvaluateAsInt(*this); 2837 uint64_t BitWidth = BitWidthAP.getZExtValue(); 2838 uint64_t IntSize = getTypeSize(IntTy); 2839 // GCC extension compatibility: if the bit-field size is less than or equal 2840 // to the size of int, it gets promoted no matter what its type is. 2841 // For instance, unsigned long bf : 4 gets promoted to signed int. 2842 if (BitWidth < IntSize) 2843 return IntTy; 2844 2845 if (BitWidth == IntSize) 2846 return FT->isSignedIntegerType() ? IntTy : UnsignedIntTy; 2847 2848 // Types bigger than int are not subject to promotions, and therefore act 2849 // like the base type. 2850 // FIXME: This doesn't quite match what gcc does, but what gcc does here 2851 // is ridiculous. 2852 return QualType(); 2853} 2854 2855/// getPromotedIntegerType - Returns the type that Promotable will 2856/// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 2857/// integer type. 2858QualType ASTContext::getPromotedIntegerType(QualType Promotable) { 2859 assert(!Promotable.isNull()); 2860 assert(Promotable->isPromotableIntegerType()); 2861 if (const EnumType *ET = Promotable->getAs<EnumType>()) 2862 return ET->getDecl()->getPromotionType(); 2863 if (Promotable->isSignedIntegerType()) 2864 return IntTy; 2865 uint64_t PromotableSize = getTypeSize(Promotable); 2866 uint64_t IntSize = getTypeSize(IntTy); 2867 assert(Promotable->isUnsignedIntegerType() && PromotableSize <= IntSize); 2868 return (PromotableSize != IntSize) ? IntTy : UnsignedIntTy; 2869} 2870 2871/// getIntegerTypeOrder - Returns the highest ranked integer type: 2872/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 2873/// LHS < RHS, return -1. 2874int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) { 2875 Type *LHSC = getCanonicalType(LHS).getTypePtr(); 2876 Type *RHSC = getCanonicalType(RHS).getTypePtr(); 2877 if (LHSC == RHSC) return 0; 2878 2879 bool LHSUnsigned = LHSC->isUnsignedIntegerType(); 2880 bool RHSUnsigned = RHSC->isUnsignedIntegerType(); 2881 2882 unsigned LHSRank = getIntegerRank(LHSC); 2883 unsigned RHSRank = getIntegerRank(RHSC); 2884 2885 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned. 2886 if (LHSRank == RHSRank) return 0; 2887 return LHSRank > RHSRank ? 1 : -1; 2888 } 2889 2890 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa. 2891 if (LHSUnsigned) { 2892 // If the unsigned [LHS] type is larger, return it. 2893 if (LHSRank >= RHSRank) 2894 return 1; 2895 2896 // If the signed type can represent all values of the unsigned type, it 2897 // wins. Because we are dealing with 2's complement and types that are 2898 // powers of two larger than each other, this is always safe. 2899 return -1; 2900 } 2901 2902 // If the unsigned [RHS] type is larger, return it. 2903 if (RHSRank >= LHSRank) 2904 return -1; 2905 2906 // If the signed type can represent all values of the unsigned type, it 2907 // wins. Because we are dealing with 2's complement and types that are 2908 // powers of two larger than each other, this is always safe. 2909 return 1; 2910} 2911 2912static RecordDecl * 2913CreateRecordDecl(ASTContext &Ctx, RecordDecl::TagKind TK, DeclContext *DC, 2914 SourceLocation L, IdentifierInfo *Id) { 2915 if (Ctx.getLangOptions().CPlusPlus) 2916 return CXXRecordDecl::Create(Ctx, TK, DC, L, Id); 2917 else 2918 return RecordDecl::Create(Ctx, TK, DC, L, Id); 2919} 2920 2921// getCFConstantStringType - Return the type used for constant CFStrings. 2922QualType ASTContext::getCFConstantStringType() { 2923 if (!CFConstantStringTypeDecl) { 2924 CFConstantStringTypeDecl = 2925 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 2926 &Idents.get("NSConstantString")); 2927 CFConstantStringTypeDecl->startDefinition(); 2928 2929 QualType FieldTypes[4]; 2930 2931 // const int *isa; 2932 FieldTypes[0] = getPointerType(IntTy.withConst()); 2933 // int flags; 2934 FieldTypes[1] = IntTy; 2935 // const char *str; 2936 FieldTypes[2] = getPointerType(CharTy.withConst()); 2937 // long length; 2938 FieldTypes[3] = LongTy; 2939 2940 // Create fields 2941 for (unsigned i = 0; i < 4; ++i) { 2942 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl, 2943 SourceLocation(), 0, 2944 FieldTypes[i], /*TInfo=*/0, 2945 /*BitWidth=*/0, 2946 /*Mutable=*/false); 2947 Field->setAccess(AS_public); 2948 CFConstantStringTypeDecl->addDecl(Field); 2949 } 2950 2951 CFConstantStringTypeDecl->completeDefinition(); 2952 } 2953 2954 return getTagDeclType(CFConstantStringTypeDecl); 2955} 2956 2957void ASTContext::setCFConstantStringType(QualType T) { 2958 const RecordType *Rec = T->getAs<RecordType>(); 2959 assert(Rec && "Invalid CFConstantStringType"); 2960 CFConstantStringTypeDecl = Rec->getDecl(); 2961} 2962 2963// getNSConstantStringType - Return the type used for constant NSStrings. 2964QualType ASTContext::getNSConstantStringType() { 2965 if (!NSConstantStringTypeDecl) { 2966 NSConstantStringTypeDecl = 2967 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 2968 &Idents.get("__builtin_NSString")); 2969 NSConstantStringTypeDecl->startDefinition(); 2970 2971 QualType FieldTypes[3]; 2972 2973 // const int *isa; 2974 FieldTypes[0] = getPointerType(IntTy.withConst()); 2975 // const char *str; 2976 FieldTypes[1] = getPointerType(CharTy.withConst()); 2977 // unsigned int length; 2978 FieldTypes[2] = UnsignedIntTy; 2979 2980 // Create fields 2981 for (unsigned i = 0; i < 3; ++i) { 2982 FieldDecl *Field = FieldDecl::Create(*this, NSConstantStringTypeDecl, 2983 SourceLocation(), 0, 2984 FieldTypes[i], /*TInfo=*/0, 2985 /*BitWidth=*/0, 2986 /*Mutable=*/false); 2987 Field->setAccess(AS_public); 2988 NSConstantStringTypeDecl->addDecl(Field); 2989 } 2990 2991 NSConstantStringTypeDecl->completeDefinition(); 2992 } 2993 2994 return getTagDeclType(NSConstantStringTypeDecl); 2995} 2996 2997void ASTContext::setNSConstantStringType(QualType T) { 2998 const RecordType *Rec = T->getAs<RecordType>(); 2999 assert(Rec && "Invalid NSConstantStringType"); 3000 NSConstantStringTypeDecl = Rec->getDecl(); 3001} 3002 3003QualType ASTContext::getObjCFastEnumerationStateType() { 3004 if (!ObjCFastEnumerationStateTypeDecl) { 3005 ObjCFastEnumerationStateTypeDecl = 3006 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3007 &Idents.get("__objcFastEnumerationState")); 3008 ObjCFastEnumerationStateTypeDecl->startDefinition(); 3009 3010 QualType FieldTypes[] = { 3011 UnsignedLongTy, 3012 getPointerType(ObjCIdTypedefType), 3013 getPointerType(UnsignedLongTy), 3014 getConstantArrayType(UnsignedLongTy, 3015 llvm::APInt(32, 5), ArrayType::Normal, 0) 3016 }; 3017 3018 for (size_t i = 0; i < 4; ++i) { 3019 FieldDecl *Field = FieldDecl::Create(*this, 3020 ObjCFastEnumerationStateTypeDecl, 3021 SourceLocation(), 0, 3022 FieldTypes[i], /*TInfo=*/0, 3023 /*BitWidth=*/0, 3024 /*Mutable=*/false); 3025 Field->setAccess(AS_public); 3026 ObjCFastEnumerationStateTypeDecl->addDecl(Field); 3027 } 3028 if (getLangOptions().CPlusPlus) 3029 if (CXXRecordDecl *CXXRD = 3030 dyn_cast<CXXRecordDecl>(ObjCFastEnumerationStateTypeDecl)) 3031 CXXRD->setEmpty(false); 3032 3033 ObjCFastEnumerationStateTypeDecl->completeDefinition(); 3034 } 3035 3036 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 3037} 3038 3039QualType ASTContext::getBlockDescriptorType() { 3040 if (BlockDescriptorType) 3041 return getTagDeclType(BlockDescriptorType); 3042 3043 RecordDecl *T; 3044 // FIXME: Needs the FlagAppleBlock bit. 3045 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3046 &Idents.get("__block_descriptor")); 3047 T->startDefinition(); 3048 3049 QualType FieldTypes[] = { 3050 UnsignedLongTy, 3051 UnsignedLongTy, 3052 }; 3053 3054 const char *FieldNames[] = { 3055 "reserved", 3056 "Size" 3057 }; 3058 3059 for (size_t i = 0; i < 2; ++i) { 3060 FieldDecl *Field = FieldDecl::Create(*this, 3061 T, 3062 SourceLocation(), 3063 &Idents.get(FieldNames[i]), 3064 FieldTypes[i], /*TInfo=*/0, 3065 /*BitWidth=*/0, 3066 /*Mutable=*/false); 3067 Field->setAccess(AS_public); 3068 T->addDecl(Field); 3069 } 3070 3071 T->completeDefinition(); 3072 3073 BlockDescriptorType = T; 3074 3075 return getTagDeclType(BlockDescriptorType); 3076} 3077 3078void ASTContext::setBlockDescriptorType(QualType T) { 3079 const RecordType *Rec = T->getAs<RecordType>(); 3080 assert(Rec && "Invalid BlockDescriptorType"); 3081 BlockDescriptorType = Rec->getDecl(); 3082} 3083 3084QualType ASTContext::getBlockDescriptorExtendedType() { 3085 if (BlockDescriptorExtendedType) 3086 return getTagDeclType(BlockDescriptorExtendedType); 3087 3088 RecordDecl *T; 3089 // FIXME: Needs the FlagAppleBlock bit. 3090 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3091 &Idents.get("__block_descriptor_withcopydispose")); 3092 T->startDefinition(); 3093 3094 QualType FieldTypes[] = { 3095 UnsignedLongTy, 3096 UnsignedLongTy, 3097 getPointerType(VoidPtrTy), 3098 getPointerType(VoidPtrTy) 3099 }; 3100 3101 const char *FieldNames[] = { 3102 "reserved", 3103 "Size", 3104 "CopyFuncPtr", 3105 "DestroyFuncPtr" 3106 }; 3107 3108 for (size_t i = 0; i < 4; ++i) { 3109 FieldDecl *Field = FieldDecl::Create(*this, 3110 T, 3111 SourceLocation(), 3112 &Idents.get(FieldNames[i]), 3113 FieldTypes[i], /*TInfo=*/0, 3114 /*BitWidth=*/0, 3115 /*Mutable=*/false); 3116 Field->setAccess(AS_public); 3117 T->addDecl(Field); 3118 } 3119 3120 T->completeDefinition(); 3121 3122 BlockDescriptorExtendedType = T; 3123 3124 return getTagDeclType(BlockDescriptorExtendedType); 3125} 3126 3127void ASTContext::setBlockDescriptorExtendedType(QualType T) { 3128 const RecordType *Rec = T->getAs<RecordType>(); 3129 assert(Rec && "Invalid BlockDescriptorType"); 3130 BlockDescriptorExtendedType = Rec->getDecl(); 3131} 3132 3133bool ASTContext::BlockRequiresCopying(QualType Ty) { 3134 if (Ty->isBlockPointerType()) 3135 return true; 3136 if (isObjCNSObjectType(Ty)) 3137 return true; 3138 if (Ty->isObjCObjectPointerType()) 3139 return true; 3140 return false; 3141} 3142 3143QualType ASTContext::BuildByRefType(const char *DeclName, QualType Ty) { 3144 // type = struct __Block_byref_1_X { 3145 // void *__isa; 3146 // struct __Block_byref_1_X *__forwarding; 3147 // unsigned int __flags; 3148 // unsigned int __size; 3149 // void *__copy_helper; // as needed 3150 // void *__destroy_help // as needed 3151 // int X; 3152 // } * 3153 3154 bool HasCopyAndDispose = BlockRequiresCopying(Ty); 3155 3156 // FIXME: Move up 3157 static unsigned int UniqueBlockByRefTypeID = 0; 3158 llvm::SmallString<36> Name; 3159 llvm::raw_svector_ostream(Name) << "__Block_byref_" << 3160 ++UniqueBlockByRefTypeID << '_' << DeclName; 3161 RecordDecl *T; 3162 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3163 &Idents.get(Name.str())); 3164 T->startDefinition(); 3165 QualType Int32Ty = IntTy; 3166 assert(getIntWidth(IntTy) == 32 && "non-32bit int not supported"); 3167 QualType FieldTypes[] = { 3168 getPointerType(VoidPtrTy), 3169 getPointerType(getTagDeclType(T)), 3170 Int32Ty, 3171 Int32Ty, 3172 getPointerType(VoidPtrTy), 3173 getPointerType(VoidPtrTy), 3174 Ty 3175 }; 3176 3177 const char *FieldNames[] = { 3178 "__isa", 3179 "__forwarding", 3180 "__flags", 3181 "__size", 3182 "__copy_helper", 3183 "__destroy_helper", 3184 DeclName, 3185 }; 3186 3187 for (size_t i = 0; i < 7; ++i) { 3188 if (!HasCopyAndDispose && i >=4 && i <= 5) 3189 continue; 3190 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3191 &Idents.get(FieldNames[i]), 3192 FieldTypes[i], /*TInfo=*/0, 3193 /*BitWidth=*/0, /*Mutable=*/false); 3194 Field->setAccess(AS_public); 3195 T->addDecl(Field); 3196 } 3197 3198 T->completeDefinition(); 3199 3200 return getPointerType(getTagDeclType(T)); 3201} 3202 3203 3204QualType ASTContext::getBlockParmType( 3205 bool BlockHasCopyDispose, 3206 llvm::SmallVectorImpl<const Expr *> &Layout) { 3207 3208 // FIXME: Move up 3209 static unsigned int UniqueBlockParmTypeID = 0; 3210 llvm::SmallString<36> Name; 3211 llvm::raw_svector_ostream(Name) << "__block_literal_" 3212 << ++UniqueBlockParmTypeID; 3213 RecordDecl *T; 3214 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3215 &Idents.get(Name.str())); 3216 T->startDefinition(); 3217 QualType FieldTypes[] = { 3218 getPointerType(VoidPtrTy), 3219 IntTy, 3220 IntTy, 3221 getPointerType(VoidPtrTy), 3222 (BlockHasCopyDispose ? 3223 getPointerType(getBlockDescriptorExtendedType()) : 3224 getPointerType(getBlockDescriptorType())) 3225 }; 3226 3227 const char *FieldNames[] = { 3228 "__isa", 3229 "__flags", 3230 "__reserved", 3231 "__FuncPtr", 3232 "__descriptor" 3233 }; 3234 3235 for (size_t i = 0; i < 5; ++i) { 3236 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3237 &Idents.get(FieldNames[i]), 3238 FieldTypes[i], /*TInfo=*/0, 3239 /*BitWidth=*/0, /*Mutable=*/false); 3240 Field->setAccess(AS_public); 3241 T->addDecl(Field); 3242 } 3243 3244 for (unsigned i = 0; i < Layout.size(); ++i) { 3245 const Expr *E = Layout[i]; 3246 3247 QualType FieldType = E->getType(); 3248 IdentifierInfo *FieldName = 0; 3249 if (isa<CXXThisExpr>(E)) { 3250 FieldName = &Idents.get("this"); 3251 } else if (const BlockDeclRefExpr *BDRE = dyn_cast<BlockDeclRefExpr>(E)) { 3252 const ValueDecl *D = BDRE->getDecl(); 3253 FieldName = D->getIdentifier(); 3254 if (BDRE->isByRef()) 3255 FieldType = BuildByRefType(D->getNameAsCString(), FieldType); 3256 } else { 3257 // Padding. 3258 assert(isa<ConstantArrayType>(FieldType) && 3259 isa<DeclRefExpr>(E) && 3260 !cast<DeclRefExpr>(E)->getDecl()->getDeclName() && 3261 "doesn't match characteristics of padding decl"); 3262 } 3263 3264 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3265 FieldName, FieldType, /*TInfo=*/0, 3266 /*BitWidth=*/0, /*Mutable=*/false); 3267 Field->setAccess(AS_public); 3268 T->addDecl(Field); 3269 } 3270 3271 T->completeDefinition(); 3272 3273 return getPointerType(getTagDeclType(T)); 3274} 3275 3276void ASTContext::setObjCFastEnumerationStateType(QualType T) { 3277 const RecordType *Rec = T->getAs<RecordType>(); 3278 assert(Rec && "Invalid ObjCFAstEnumerationStateType"); 3279 ObjCFastEnumerationStateTypeDecl = Rec->getDecl(); 3280} 3281 3282// This returns true if a type has been typedefed to BOOL: 3283// typedef <type> BOOL; 3284static bool isTypeTypedefedAsBOOL(QualType T) { 3285 if (const TypedefType *TT = dyn_cast<TypedefType>(T)) 3286 if (IdentifierInfo *II = TT->getDecl()->getIdentifier()) 3287 return II->isStr("BOOL"); 3288 3289 return false; 3290} 3291 3292/// getObjCEncodingTypeSize returns size of type for objective-c encoding 3293/// purpose. 3294CharUnits ASTContext::getObjCEncodingTypeSize(QualType type) { 3295 CharUnits sz = getTypeSizeInChars(type); 3296 3297 // Make all integer and enum types at least as large as an int 3298 if (sz.isPositive() && type->isIntegralOrEnumerationType()) 3299 sz = std::max(sz, getTypeSizeInChars(IntTy)); 3300 // Treat arrays as pointers, since that's how they're passed in. 3301 else if (type->isArrayType()) 3302 sz = getTypeSizeInChars(VoidPtrTy); 3303 return sz; 3304} 3305 3306static inline 3307std::string charUnitsToString(const CharUnits &CU) { 3308 return llvm::itostr(CU.getQuantity()); 3309} 3310 3311/// getObjCEncodingForBlockDecl - Return the encoded type for this block 3312/// declaration. 3313void ASTContext::getObjCEncodingForBlock(const BlockExpr *Expr, 3314 std::string& S) { 3315 const BlockDecl *Decl = Expr->getBlockDecl(); 3316 QualType BlockTy = 3317 Expr->getType()->getAs<BlockPointerType>()->getPointeeType(); 3318 // Encode result type. 3319 getObjCEncodingForType(BlockTy->getAs<FunctionType>()->getResultType(), S); 3320 // Compute size of all parameters. 3321 // Start with computing size of a pointer in number of bytes. 3322 // FIXME: There might(should) be a better way of doing this computation! 3323 SourceLocation Loc; 3324 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3325 CharUnits ParmOffset = PtrSize; 3326 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), 3327 E = Decl->param_end(); PI != E; ++PI) { 3328 QualType PType = (*PI)->getType(); 3329 CharUnits sz = getObjCEncodingTypeSize(PType); 3330 assert (sz.isPositive() && "BlockExpr - Incomplete param type"); 3331 ParmOffset += sz; 3332 } 3333 // Size of the argument frame 3334 S += charUnitsToString(ParmOffset); 3335 // Block pointer and offset. 3336 S += "@?0"; 3337 ParmOffset = PtrSize; 3338 3339 // Argument types. 3340 ParmOffset = PtrSize; 3341 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), E = 3342 Decl->param_end(); PI != E; ++PI) { 3343 ParmVarDecl *PVDecl = *PI; 3344 QualType PType = PVDecl->getOriginalType(); 3345 if (const ArrayType *AT = 3346 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3347 // Use array's original type only if it has known number of 3348 // elements. 3349 if (!isa<ConstantArrayType>(AT)) 3350 PType = PVDecl->getType(); 3351 } else if (PType->isFunctionType()) 3352 PType = PVDecl->getType(); 3353 getObjCEncodingForType(PType, S); 3354 S += charUnitsToString(ParmOffset); 3355 ParmOffset += getObjCEncodingTypeSize(PType); 3356 } 3357} 3358 3359/// getObjCEncodingForMethodDecl - Return the encoded type for this method 3360/// declaration. 3361void ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, 3362 std::string& S) { 3363 // FIXME: This is not very efficient. 3364 // Encode type qualifer, 'in', 'inout', etc. for the return type. 3365 getObjCEncodingForTypeQualifier(Decl->getObjCDeclQualifier(), S); 3366 // Encode result type. 3367 getObjCEncodingForType(Decl->getResultType(), S); 3368 // Compute size of all parameters. 3369 // Start with computing size of a pointer in number of bytes. 3370 // FIXME: There might(should) be a better way of doing this computation! 3371 SourceLocation Loc; 3372 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3373 // The first two arguments (self and _cmd) are pointers; account for 3374 // their size. 3375 CharUnits ParmOffset = 2 * PtrSize; 3376 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3377 E = Decl->sel_param_end(); PI != E; ++PI) { 3378 QualType PType = (*PI)->getType(); 3379 CharUnits sz = getObjCEncodingTypeSize(PType); 3380 assert (sz.isPositive() && 3381 "getObjCEncodingForMethodDecl - Incomplete param type"); 3382 ParmOffset += sz; 3383 } 3384 S += charUnitsToString(ParmOffset); 3385 S += "@0:"; 3386 S += charUnitsToString(PtrSize); 3387 3388 // Argument types. 3389 ParmOffset = 2 * PtrSize; 3390 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3391 E = Decl->sel_param_end(); PI != E; ++PI) { 3392 ParmVarDecl *PVDecl = *PI; 3393 QualType PType = PVDecl->getOriginalType(); 3394 if (const ArrayType *AT = 3395 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3396 // Use array's original type only if it has known number of 3397 // elements. 3398 if (!isa<ConstantArrayType>(AT)) 3399 PType = PVDecl->getType(); 3400 } else if (PType->isFunctionType()) 3401 PType = PVDecl->getType(); 3402 // Process argument qualifiers for user supplied arguments; such as, 3403 // 'in', 'inout', etc. 3404 getObjCEncodingForTypeQualifier(PVDecl->getObjCDeclQualifier(), S); 3405 getObjCEncodingForType(PType, S); 3406 S += charUnitsToString(ParmOffset); 3407 ParmOffset += getObjCEncodingTypeSize(PType); 3408 } 3409} 3410 3411/// getObjCEncodingForPropertyDecl - Return the encoded type for this 3412/// property declaration. If non-NULL, Container must be either an 3413/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be 3414/// NULL when getting encodings for protocol properties. 3415/// Property attributes are stored as a comma-delimited C string. The simple 3416/// attributes readonly and bycopy are encoded as single characters. The 3417/// parametrized attributes, getter=name, setter=name, and ivar=name, are 3418/// encoded as single characters, followed by an identifier. Property types 3419/// are also encoded as a parametrized attribute. The characters used to encode 3420/// these attributes are defined by the following enumeration: 3421/// @code 3422/// enum PropertyAttributes { 3423/// kPropertyReadOnly = 'R', // property is read-only. 3424/// kPropertyBycopy = 'C', // property is a copy of the value last assigned 3425/// kPropertyByref = '&', // property is a reference to the value last assigned 3426/// kPropertyDynamic = 'D', // property is dynamic 3427/// kPropertyGetter = 'G', // followed by getter selector name 3428/// kPropertySetter = 'S', // followed by setter selector name 3429/// kPropertyInstanceVariable = 'V' // followed by instance variable name 3430/// kPropertyType = 't' // followed by old-style type encoding. 3431/// kPropertyWeak = 'W' // 'weak' property 3432/// kPropertyStrong = 'P' // property GC'able 3433/// kPropertyNonAtomic = 'N' // property non-atomic 3434/// }; 3435/// @endcode 3436void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 3437 const Decl *Container, 3438 std::string& S) { 3439 // Collect information from the property implementation decl(s). 3440 bool Dynamic = false; 3441 ObjCPropertyImplDecl *SynthesizePID = 0; 3442 3443 // FIXME: Duplicated code due to poor abstraction. 3444 if (Container) { 3445 if (const ObjCCategoryImplDecl *CID = 3446 dyn_cast<ObjCCategoryImplDecl>(Container)) { 3447 for (ObjCCategoryImplDecl::propimpl_iterator 3448 i = CID->propimpl_begin(), e = CID->propimpl_end(); 3449 i != e; ++i) { 3450 ObjCPropertyImplDecl *PID = *i; 3451 if (PID->getPropertyDecl() == PD) { 3452 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3453 Dynamic = true; 3454 } else { 3455 SynthesizePID = PID; 3456 } 3457 } 3458 } 3459 } else { 3460 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container); 3461 for (ObjCCategoryImplDecl::propimpl_iterator 3462 i = OID->propimpl_begin(), e = OID->propimpl_end(); 3463 i != e; ++i) { 3464 ObjCPropertyImplDecl *PID = *i; 3465 if (PID->getPropertyDecl() == PD) { 3466 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3467 Dynamic = true; 3468 } else { 3469 SynthesizePID = PID; 3470 } 3471 } 3472 } 3473 } 3474 } 3475 3476 // FIXME: This is not very efficient. 3477 S = "T"; 3478 3479 // Encode result type. 3480 // GCC has some special rules regarding encoding of properties which 3481 // closely resembles encoding of ivars. 3482 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, 0, 3483 true /* outermost type */, 3484 true /* encoding for property */); 3485 3486 if (PD->isReadOnly()) { 3487 S += ",R"; 3488 } else { 3489 switch (PD->getSetterKind()) { 3490 case ObjCPropertyDecl::Assign: break; 3491 case ObjCPropertyDecl::Copy: S += ",C"; break; 3492 case ObjCPropertyDecl::Retain: S += ",&"; break; 3493 } 3494 } 3495 3496 // It really isn't clear at all what this means, since properties 3497 // are "dynamic by default". 3498 if (Dynamic) 3499 S += ",D"; 3500 3501 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) 3502 S += ",N"; 3503 3504 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) { 3505 S += ",G"; 3506 S += PD->getGetterName().getAsString(); 3507 } 3508 3509 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) { 3510 S += ",S"; 3511 S += PD->getSetterName().getAsString(); 3512 } 3513 3514 if (SynthesizePID) { 3515 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl(); 3516 S += ",V"; 3517 S += OID->getNameAsString(); 3518 } 3519 3520 // FIXME: OBJCGC: weak & strong 3521} 3522 3523/// getLegacyIntegralTypeEncoding - 3524/// Another legacy compatibility encoding: 32-bit longs are encoded as 3525/// 'l' or 'L' , but not always. For typedefs, we need to use 3526/// 'i' or 'I' instead if encoding a struct field, or a pointer! 3527/// 3528void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const { 3529 if (isa<TypedefType>(PointeeTy.getTypePtr())) { 3530 if (const BuiltinType *BT = PointeeTy->getAs<BuiltinType>()) { 3531 if (BT->getKind() == BuiltinType::ULong && 3532 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3533 PointeeTy = UnsignedIntTy; 3534 else 3535 if (BT->getKind() == BuiltinType::Long && 3536 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3537 PointeeTy = IntTy; 3538 } 3539 } 3540} 3541 3542void ASTContext::getObjCEncodingForType(QualType T, std::string& S, 3543 const FieldDecl *Field) { 3544 // We follow the behavior of gcc, expanding structures which are 3545 // directly pointed to, and expanding embedded structures. Note that 3546 // these rules are sufficient to prevent recursive encoding of the 3547 // same type. 3548 getObjCEncodingForTypeImpl(T, S, true, true, Field, 3549 true /* outermost type */); 3550} 3551 3552static char ObjCEncodingForPrimitiveKind(const ASTContext *C, QualType T) { 3553 switch (T->getAs<BuiltinType>()->getKind()) { 3554 default: assert(0 && "Unhandled builtin type kind"); 3555 case BuiltinType::Void: return 'v'; 3556 case BuiltinType::Bool: return 'B'; 3557 case BuiltinType::Char_U: 3558 case BuiltinType::UChar: return 'C'; 3559 case BuiltinType::UShort: return 'S'; 3560 case BuiltinType::UInt: return 'I'; 3561 case BuiltinType::ULong: 3562 return 3563 (const_cast<ASTContext *>(C))->getIntWidth(T) == 32 ? 'L' : 'Q'; 3564 case BuiltinType::UInt128: return 'T'; 3565 case BuiltinType::ULongLong: return 'Q'; 3566 case BuiltinType::Char_S: 3567 case BuiltinType::SChar: return 'c'; 3568 case BuiltinType::Short: return 's'; 3569 case BuiltinType::WChar: 3570 case BuiltinType::Int: return 'i'; 3571 case BuiltinType::Long: 3572 return 3573 (const_cast<ASTContext *>(C))->getIntWidth(T) == 32 ? 'l' : 'q'; 3574 case BuiltinType::LongLong: return 'q'; 3575 case BuiltinType::Int128: return 't'; 3576 case BuiltinType::Float: return 'f'; 3577 case BuiltinType::Double: return 'd'; 3578 case BuiltinType::LongDouble: return 'd'; 3579 } 3580} 3581 3582static void EncodeBitField(const ASTContext *Context, std::string& S, 3583 QualType T, const FieldDecl *FD) { 3584 const Expr *E = FD->getBitWidth(); 3585 assert(E && "bitfield width not there - getObjCEncodingForTypeImpl"); 3586 ASTContext *Ctx = const_cast<ASTContext*>(Context); 3587 S += 'b'; 3588 // The NeXT runtime encodes bit fields as b followed by the number of bits. 3589 // The GNU runtime requires more information; bitfields are encoded as b, 3590 // then the offset (in bits) of the first element, then the type of the 3591 // bitfield, then the size in bits. For example, in this structure: 3592 // 3593 // struct 3594 // { 3595 // int integer; 3596 // int flags:2; 3597 // }; 3598 // On a 32-bit system, the encoding for flags would be b2 for the NeXT 3599 // runtime, but b32i2 for the GNU runtime. The reason for this extra 3600 // information is not especially sensible, but we're stuck with it for 3601 // compatibility with GCC, although providing it breaks anything that 3602 // actually uses runtime introspection and wants to work on both runtimes... 3603 if (!Ctx->getLangOptions().NeXTRuntime) { 3604 const RecordDecl *RD = FD->getParent(); 3605 const ASTRecordLayout &RL = Ctx->getASTRecordLayout(RD); 3606 // FIXME: This same linear search is also used in ExprConstant - it might 3607 // be better if the FieldDecl stored its offset. We'd be increasing the 3608 // size of the object slightly, but saving some time every time it is used. 3609 unsigned i = 0; 3610 for (RecordDecl::field_iterator Field = RD->field_begin(), 3611 FieldEnd = RD->field_end(); 3612 Field != FieldEnd; (void)++Field, ++i) { 3613 if (*Field == FD) 3614 break; 3615 } 3616 S += llvm::utostr(RL.getFieldOffset(i)); 3617 S += ObjCEncodingForPrimitiveKind(Context, T); 3618 } 3619 unsigned N = E->EvaluateAsInt(*Ctx).getZExtValue(); 3620 S += llvm::utostr(N); 3621} 3622 3623// FIXME: Use SmallString for accumulating string. 3624void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S, 3625 bool ExpandPointedToStructures, 3626 bool ExpandStructures, 3627 const FieldDecl *FD, 3628 bool OutermostType, 3629 bool EncodingProperty) { 3630 if (T->getAs<BuiltinType>()) { 3631 if (FD && FD->isBitField()) 3632 return EncodeBitField(this, S, T, FD); 3633 S += ObjCEncodingForPrimitiveKind(this, T); 3634 return; 3635 } 3636 3637 if (const ComplexType *CT = T->getAs<ComplexType>()) { 3638 S += 'j'; 3639 getObjCEncodingForTypeImpl(CT->getElementType(), S, false, false, 0, false, 3640 false); 3641 return; 3642 } 3643 3644 // encoding for pointer or r3eference types. 3645 QualType PointeeTy; 3646 if (const PointerType *PT = T->getAs<PointerType>()) { 3647 if (PT->isObjCSelType()) { 3648 S += ':'; 3649 return; 3650 } 3651 PointeeTy = PT->getPointeeType(); 3652 } 3653 else if (const ReferenceType *RT = T->getAs<ReferenceType>()) 3654 PointeeTy = RT->getPointeeType(); 3655 if (!PointeeTy.isNull()) { 3656 bool isReadOnly = false; 3657 // For historical/compatibility reasons, the read-only qualifier of the 3658 // pointee gets emitted _before_ the '^'. The read-only qualifier of 3659 // the pointer itself gets ignored, _unless_ we are looking at a typedef! 3660 // Also, do not emit the 'r' for anything but the outermost type! 3661 if (isa<TypedefType>(T.getTypePtr())) { 3662 if (OutermostType && T.isConstQualified()) { 3663 isReadOnly = true; 3664 S += 'r'; 3665 } 3666 } else if (OutermostType) { 3667 QualType P = PointeeTy; 3668 while (P->getAs<PointerType>()) 3669 P = P->getAs<PointerType>()->getPointeeType(); 3670 if (P.isConstQualified()) { 3671 isReadOnly = true; 3672 S += 'r'; 3673 } 3674 } 3675 if (isReadOnly) { 3676 // Another legacy compatibility encoding. Some ObjC qualifier and type 3677 // combinations need to be rearranged. 3678 // Rewrite "in const" from "nr" to "rn" 3679 if (llvm::StringRef(S).endswith("nr")) 3680 S.replace(S.end()-2, S.end(), "rn"); 3681 } 3682 3683 if (PointeeTy->isCharType()) { 3684 // char pointer types should be encoded as '*' unless it is a 3685 // type that has been typedef'd to 'BOOL'. 3686 if (!isTypeTypedefedAsBOOL(PointeeTy)) { 3687 S += '*'; 3688 return; 3689 } 3690 } else if (const RecordType *RTy = PointeeTy->getAs<RecordType>()) { 3691 // GCC binary compat: Need to convert "struct objc_class *" to "#". 3692 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_class")) { 3693 S += '#'; 3694 return; 3695 } 3696 // GCC binary compat: Need to convert "struct objc_object *" to "@". 3697 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_object")) { 3698 S += '@'; 3699 return; 3700 } 3701 // fall through... 3702 } 3703 S += '^'; 3704 getLegacyIntegralTypeEncoding(PointeeTy); 3705 3706 getObjCEncodingForTypeImpl(PointeeTy, S, false, ExpandPointedToStructures, 3707 NULL); 3708 return; 3709 } 3710 3711 if (const ArrayType *AT = 3712 // Ignore type qualifiers etc. 3713 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) { 3714 if (isa<IncompleteArrayType>(AT)) { 3715 // Incomplete arrays are encoded as a pointer to the array element. 3716 S += '^'; 3717 3718 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3719 false, ExpandStructures, FD); 3720 } else { 3721 S += '['; 3722 3723 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 3724 S += llvm::utostr(CAT->getSize().getZExtValue()); 3725 else { 3726 //Variable length arrays are encoded as a regular array with 0 elements. 3727 assert(isa<VariableArrayType>(AT) && "Unknown array type!"); 3728 S += '0'; 3729 } 3730 3731 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3732 false, ExpandStructures, FD); 3733 S += ']'; 3734 } 3735 return; 3736 } 3737 3738 if (T->getAs<FunctionType>()) { 3739 S += '?'; 3740 return; 3741 } 3742 3743 if (const RecordType *RTy = T->getAs<RecordType>()) { 3744 RecordDecl *RDecl = RTy->getDecl(); 3745 S += RDecl->isUnion() ? '(' : '{'; 3746 // Anonymous structures print as '?' 3747 if (const IdentifierInfo *II = RDecl->getIdentifier()) { 3748 S += II->getName(); 3749 if (ClassTemplateSpecializationDecl *Spec 3750 = dyn_cast<ClassTemplateSpecializationDecl>(RDecl)) { 3751 const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs(); 3752 std::string TemplateArgsStr 3753 = TemplateSpecializationType::PrintTemplateArgumentList( 3754 TemplateArgs.getFlatArgumentList(), 3755 TemplateArgs.flat_size(), 3756 (*this).PrintingPolicy); 3757 3758 S += TemplateArgsStr; 3759 } 3760 } else { 3761 S += '?'; 3762 } 3763 if (ExpandStructures) { 3764 S += '='; 3765 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 3766 FieldEnd = RDecl->field_end(); 3767 Field != FieldEnd; ++Field) { 3768 if (FD) { 3769 S += '"'; 3770 S += Field->getNameAsString(); 3771 S += '"'; 3772 } 3773 3774 // Special case bit-fields. 3775 if (Field->isBitField()) { 3776 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, 3777 (*Field)); 3778 } else { 3779 QualType qt = Field->getType(); 3780 getLegacyIntegralTypeEncoding(qt); 3781 getObjCEncodingForTypeImpl(qt, S, false, true, 3782 FD); 3783 } 3784 } 3785 } 3786 S += RDecl->isUnion() ? ')' : '}'; 3787 return; 3788 } 3789 3790 if (T->isEnumeralType()) { 3791 if (FD && FD->isBitField()) 3792 EncodeBitField(this, S, T, FD); 3793 else 3794 S += 'i'; 3795 return; 3796 } 3797 3798 if (T->isBlockPointerType()) { 3799 S += "@?"; // Unlike a pointer-to-function, which is "^?". 3800 return; 3801 } 3802 3803 // Ignore protocol qualifiers when mangling at this level. 3804 if (const ObjCObjectType *OT = T->getAs<ObjCObjectType>()) 3805 T = OT->getBaseType(); 3806 3807 if (const ObjCInterfaceType *OIT = T->getAs<ObjCInterfaceType>()) { 3808 // @encode(class_name) 3809 ObjCInterfaceDecl *OI = OIT->getDecl(); 3810 S += '{'; 3811 const IdentifierInfo *II = OI->getIdentifier(); 3812 S += II->getName(); 3813 S += '='; 3814 llvm::SmallVector<FieldDecl*, 32> RecFields; 3815 CollectObjCIvars(OI, RecFields); 3816 for (unsigned i = 0, e = RecFields.size(); i != e; ++i) { 3817 if (RecFields[i]->isBitField()) 3818 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 3819 RecFields[i]); 3820 else 3821 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 3822 FD); 3823 } 3824 S += '}'; 3825 return; 3826 } 3827 3828 if (const ObjCObjectPointerType *OPT = T->getAs<ObjCObjectPointerType>()) { 3829 if (OPT->isObjCIdType()) { 3830 S += '@'; 3831 return; 3832 } 3833 3834 if (OPT->isObjCClassType() || OPT->isObjCQualifiedClassType()) { 3835 // FIXME: Consider if we need to output qualifiers for 'Class<p>'. 3836 // Since this is a binary compatibility issue, need to consult with runtime 3837 // folks. Fortunately, this is a *very* obsure construct. 3838 S += '#'; 3839 return; 3840 } 3841 3842 if (OPT->isObjCQualifiedIdType()) { 3843 getObjCEncodingForTypeImpl(getObjCIdType(), S, 3844 ExpandPointedToStructures, 3845 ExpandStructures, FD); 3846 if (FD || EncodingProperty) { 3847 // Note that we do extended encoding of protocol qualifer list 3848 // Only when doing ivar or property encoding. 3849 S += '"'; 3850 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 3851 E = OPT->qual_end(); I != E; ++I) { 3852 S += '<'; 3853 S += (*I)->getNameAsString(); 3854 S += '>'; 3855 } 3856 S += '"'; 3857 } 3858 return; 3859 } 3860 3861 QualType PointeeTy = OPT->getPointeeType(); 3862 if (!EncodingProperty && 3863 isa<TypedefType>(PointeeTy.getTypePtr())) { 3864 // Another historical/compatibility reason. 3865 // We encode the underlying type which comes out as 3866 // {...}; 3867 S += '^'; 3868 getObjCEncodingForTypeImpl(PointeeTy, S, 3869 false, ExpandPointedToStructures, 3870 NULL); 3871 return; 3872 } 3873 3874 S += '@'; 3875 if (OPT->getInterfaceDecl() && (FD || EncodingProperty)) { 3876 S += '"'; 3877 S += OPT->getInterfaceDecl()->getIdentifier()->getName(); 3878 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 3879 E = OPT->qual_end(); I != E; ++I) { 3880 S += '<'; 3881 S += (*I)->getNameAsString(); 3882 S += '>'; 3883 } 3884 S += '"'; 3885 } 3886 return; 3887 } 3888 3889 // gcc just blithely ignores member pointers. 3890 // TODO: maybe there should be a mangling for these 3891 if (T->getAs<MemberPointerType>()) 3892 return; 3893 3894 assert(0 && "@encode for type not implemented!"); 3895} 3896 3897void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 3898 std::string& S) const { 3899 if (QT & Decl::OBJC_TQ_In) 3900 S += 'n'; 3901 if (QT & Decl::OBJC_TQ_Inout) 3902 S += 'N'; 3903 if (QT & Decl::OBJC_TQ_Out) 3904 S += 'o'; 3905 if (QT & Decl::OBJC_TQ_Bycopy) 3906 S += 'O'; 3907 if (QT & Decl::OBJC_TQ_Byref) 3908 S += 'R'; 3909 if (QT & Decl::OBJC_TQ_Oneway) 3910 S += 'V'; 3911} 3912 3913void ASTContext::setBuiltinVaListType(QualType T) { 3914 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!"); 3915 3916 BuiltinVaListType = T; 3917} 3918 3919void ASTContext::setObjCIdType(QualType T) { 3920 ObjCIdTypedefType = T; 3921} 3922 3923void ASTContext::setObjCSelType(QualType T) { 3924 ObjCSelTypedefType = T; 3925} 3926 3927void ASTContext::setObjCProtoType(QualType QT) { 3928 ObjCProtoType = QT; 3929} 3930 3931void ASTContext::setObjCClassType(QualType T) { 3932 ObjCClassTypedefType = T; 3933} 3934 3935void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) { 3936 assert(ObjCConstantStringType.isNull() && 3937 "'NSConstantString' type already set!"); 3938 3939 ObjCConstantStringType = getObjCInterfaceType(Decl); 3940} 3941 3942/// \brief Retrieve the template name that corresponds to a non-empty 3943/// lookup. 3944TemplateName ASTContext::getOverloadedTemplateName(UnresolvedSetIterator Begin, 3945 UnresolvedSetIterator End) { 3946 unsigned size = End - Begin; 3947 assert(size > 1 && "set is not overloaded!"); 3948 3949 void *memory = Allocate(sizeof(OverloadedTemplateStorage) + 3950 size * sizeof(FunctionTemplateDecl*)); 3951 OverloadedTemplateStorage *OT = new(memory) OverloadedTemplateStorage(size); 3952 3953 NamedDecl **Storage = OT->getStorage(); 3954 for (UnresolvedSetIterator I = Begin; I != End; ++I) { 3955 NamedDecl *D = *I; 3956 assert(isa<FunctionTemplateDecl>(D) || 3957 (isa<UsingShadowDecl>(D) && 3958 isa<FunctionTemplateDecl>(D->getUnderlyingDecl()))); 3959 *Storage++ = D; 3960 } 3961 3962 return TemplateName(OT); 3963} 3964 3965/// \brief Retrieve the template name that represents a qualified 3966/// template name such as \c std::vector. 3967TemplateName ASTContext::getQualifiedTemplateName(NestedNameSpecifier *NNS, 3968 bool TemplateKeyword, 3969 TemplateDecl *Template) { 3970 // FIXME: Canonicalization? 3971 llvm::FoldingSetNodeID ID; 3972 QualifiedTemplateName::Profile(ID, NNS, TemplateKeyword, Template); 3973 3974 void *InsertPos = 0; 3975 QualifiedTemplateName *QTN = 3976 QualifiedTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3977 if (!QTN) { 3978 QTN = new (*this,4) QualifiedTemplateName(NNS, TemplateKeyword, Template); 3979 QualifiedTemplateNames.InsertNode(QTN, InsertPos); 3980 } 3981 3982 return TemplateName(QTN); 3983} 3984 3985/// \brief Retrieve the template name that represents a dependent 3986/// template name such as \c MetaFun::template apply. 3987TemplateName ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 3988 const IdentifierInfo *Name) { 3989 assert((!NNS || NNS->isDependent()) && 3990 "Nested name specifier must be dependent"); 3991 3992 llvm::FoldingSetNodeID ID; 3993 DependentTemplateName::Profile(ID, NNS, Name); 3994 3995 void *InsertPos = 0; 3996 DependentTemplateName *QTN = 3997 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3998 3999 if (QTN) 4000 return TemplateName(QTN); 4001 4002 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 4003 if (CanonNNS == NNS) { 4004 QTN = new (*this,4) DependentTemplateName(NNS, Name); 4005 } else { 4006 TemplateName Canon = getDependentTemplateName(CanonNNS, Name); 4007 QTN = new (*this,4) DependentTemplateName(NNS, Name, Canon); 4008 DependentTemplateName *CheckQTN = 4009 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4010 assert(!CheckQTN && "Dependent type name canonicalization broken"); 4011 (void)CheckQTN; 4012 } 4013 4014 DependentTemplateNames.InsertNode(QTN, InsertPos); 4015 return TemplateName(QTN); 4016} 4017 4018/// \brief Retrieve the template name that represents a dependent 4019/// template name such as \c MetaFun::template operator+. 4020TemplateName 4021ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 4022 OverloadedOperatorKind Operator) { 4023 assert((!NNS || NNS->isDependent()) && 4024 "Nested name specifier must be dependent"); 4025 4026 llvm::FoldingSetNodeID ID; 4027 DependentTemplateName::Profile(ID, NNS, Operator); 4028 4029 void *InsertPos = 0; 4030 DependentTemplateName *QTN 4031 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4032 4033 if (QTN) 4034 return TemplateName(QTN); 4035 4036 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 4037 if (CanonNNS == NNS) { 4038 QTN = new (*this,4) DependentTemplateName(NNS, Operator); 4039 } else { 4040 TemplateName Canon = getDependentTemplateName(CanonNNS, Operator); 4041 QTN = new (*this,4) DependentTemplateName(NNS, Operator, Canon); 4042 4043 DependentTemplateName *CheckQTN 4044 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4045 assert(!CheckQTN && "Dependent template name canonicalization broken"); 4046 (void)CheckQTN; 4047 } 4048 4049 DependentTemplateNames.InsertNode(QTN, InsertPos); 4050 return TemplateName(QTN); 4051} 4052 4053/// getFromTargetType - Given one of the integer types provided by 4054/// TargetInfo, produce the corresponding type. The unsigned @p Type 4055/// is actually a value of type @c TargetInfo::IntType. 4056CanQualType ASTContext::getFromTargetType(unsigned Type) const { 4057 switch (Type) { 4058 case TargetInfo::NoInt: return CanQualType(); 4059 case TargetInfo::SignedShort: return ShortTy; 4060 case TargetInfo::UnsignedShort: return UnsignedShortTy; 4061 case TargetInfo::SignedInt: return IntTy; 4062 case TargetInfo::UnsignedInt: return UnsignedIntTy; 4063 case TargetInfo::SignedLong: return LongTy; 4064 case TargetInfo::UnsignedLong: return UnsignedLongTy; 4065 case TargetInfo::SignedLongLong: return LongLongTy; 4066 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy; 4067 } 4068 4069 assert(false && "Unhandled TargetInfo::IntType value"); 4070 return CanQualType(); 4071} 4072 4073//===----------------------------------------------------------------------===// 4074// Type Predicates. 4075//===----------------------------------------------------------------------===// 4076 4077/// isObjCNSObjectType - Return true if this is an NSObject object using 4078/// NSObject attribute on a c-style pointer type. 4079/// FIXME - Make it work directly on types. 4080/// FIXME: Move to Type. 4081/// 4082bool ASTContext::isObjCNSObjectType(QualType Ty) const { 4083 if (TypedefType *TDT = dyn_cast<TypedefType>(Ty)) { 4084 if (TypedefDecl *TD = TDT->getDecl()) 4085 if (TD->getAttr<ObjCNSObjectAttr>()) 4086 return true; 4087 } 4088 return false; 4089} 4090 4091/// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 4092/// garbage collection attribute. 4093/// 4094Qualifiers::GC ASTContext::getObjCGCAttrKind(const QualType &Ty) const { 4095 Qualifiers::GC GCAttrs = Qualifiers::GCNone; 4096 if (getLangOptions().ObjC1 && 4097 getLangOptions().getGCMode() != LangOptions::NonGC) { 4098 GCAttrs = Ty.getObjCGCAttr(); 4099 // Default behavious under objective-c's gc is for objective-c pointers 4100 // (or pointers to them) be treated as though they were declared 4101 // as __strong. 4102 if (GCAttrs == Qualifiers::GCNone) { 4103 if (Ty->isObjCObjectPointerType() || Ty->isBlockPointerType()) 4104 GCAttrs = Qualifiers::Strong; 4105 else if (Ty->isPointerType()) 4106 return getObjCGCAttrKind(Ty->getAs<PointerType>()->getPointeeType()); 4107 } 4108 // Non-pointers have none gc'able attribute regardless of the attribute 4109 // set on them. 4110 else if (!Ty->isAnyPointerType() && !Ty->isBlockPointerType()) 4111 return Qualifiers::GCNone; 4112 } 4113 return GCAttrs; 4114} 4115 4116//===----------------------------------------------------------------------===// 4117// Type Compatibility Testing 4118//===----------------------------------------------------------------------===// 4119 4120/// areCompatVectorTypes - Return true if the two specified vector types are 4121/// compatible. 4122static bool areCompatVectorTypes(const VectorType *LHS, 4123 const VectorType *RHS) { 4124 assert(LHS->isCanonicalUnqualified() && RHS->isCanonicalUnqualified()); 4125 return LHS->getElementType() == RHS->getElementType() && 4126 LHS->getNumElements() == RHS->getNumElements(); 4127} 4128 4129//===----------------------------------------------------------------------===// 4130// ObjCQualifiedIdTypesAreCompatible - Compatibility testing for qualified id's. 4131//===----------------------------------------------------------------------===// 4132 4133/// ProtocolCompatibleWithProtocol - return 'true' if 'lProto' is in the 4134/// inheritance hierarchy of 'rProto'. 4135bool ASTContext::ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 4136 ObjCProtocolDecl *rProto) { 4137 if (lProto == rProto) 4138 return true; 4139 for (ObjCProtocolDecl::protocol_iterator PI = rProto->protocol_begin(), 4140 E = rProto->protocol_end(); PI != E; ++PI) 4141 if (ProtocolCompatibleWithProtocol(lProto, *PI)) 4142 return true; 4143 return false; 4144} 4145 4146/// QualifiedIdConformsQualifiedId - compare id<p,...> with id<p1,...> 4147/// return true if lhs's protocols conform to rhs's protocol; false 4148/// otherwise. 4149bool ASTContext::QualifiedIdConformsQualifiedId(QualType lhs, QualType rhs) { 4150 if (lhs->isObjCQualifiedIdType() && rhs->isObjCQualifiedIdType()) 4151 return ObjCQualifiedIdTypesAreCompatible(lhs, rhs, false); 4152 return false; 4153} 4154 4155/// ObjCQualifiedIdTypesAreCompatible - We know that one of lhs/rhs is an 4156/// ObjCQualifiedIDType. 4157bool ASTContext::ObjCQualifiedIdTypesAreCompatible(QualType lhs, QualType rhs, 4158 bool compare) { 4159 // Allow id<P..> and an 'id' or void* type in all cases. 4160 if (lhs->isVoidPointerType() || 4161 lhs->isObjCIdType() || lhs->isObjCClassType()) 4162 return true; 4163 else if (rhs->isVoidPointerType() || 4164 rhs->isObjCIdType() || rhs->isObjCClassType()) 4165 return true; 4166 4167 if (const ObjCObjectPointerType *lhsQID = lhs->getAsObjCQualifiedIdType()) { 4168 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 4169 4170 if (!rhsOPT) return false; 4171 4172 if (rhsOPT->qual_empty()) { 4173 // If the RHS is a unqualified interface pointer "NSString*", 4174 // make sure we check the class hierarchy. 4175 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4176 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4177 E = lhsQID->qual_end(); I != E; ++I) { 4178 // when comparing an id<P> on lhs with a static type on rhs, 4179 // see if static class implements all of id's protocols, directly or 4180 // through its super class and categories. 4181 if (!rhsID->ClassImplementsProtocol(*I, true)) 4182 return false; 4183 } 4184 } 4185 // If there are no qualifiers and no interface, we have an 'id'. 4186 return true; 4187 } 4188 // Both the right and left sides have qualifiers. 4189 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4190 E = lhsQID->qual_end(); I != E; ++I) { 4191 ObjCProtocolDecl *lhsProto = *I; 4192 bool match = false; 4193 4194 // when comparing an id<P> on lhs with a static type on rhs, 4195 // see if static class implements all of id's protocols, directly or 4196 // through its super class and categories. 4197 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 4198 E = rhsOPT->qual_end(); J != E; ++J) { 4199 ObjCProtocolDecl *rhsProto = *J; 4200 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4201 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4202 match = true; 4203 break; 4204 } 4205 } 4206 // If the RHS is a qualified interface pointer "NSString<P>*", 4207 // make sure we check the class hierarchy. 4208 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4209 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4210 E = lhsQID->qual_end(); I != E; ++I) { 4211 // when comparing an id<P> on lhs with a static type on rhs, 4212 // see if static class implements all of id's protocols, directly or 4213 // through its super class and categories. 4214 if (rhsID->ClassImplementsProtocol(*I, true)) { 4215 match = true; 4216 break; 4217 } 4218 } 4219 } 4220 if (!match) 4221 return false; 4222 } 4223 4224 return true; 4225 } 4226 4227 const ObjCObjectPointerType *rhsQID = rhs->getAsObjCQualifiedIdType(); 4228 assert(rhsQID && "One of the LHS/RHS should be id<x>"); 4229 4230 if (const ObjCObjectPointerType *lhsOPT = 4231 lhs->getAsObjCInterfacePointerType()) { 4232 if (lhsOPT->qual_empty()) { 4233 bool match = false; 4234 if (ObjCInterfaceDecl *lhsID = lhsOPT->getInterfaceDecl()) { 4235 for (ObjCObjectPointerType::qual_iterator I = rhsQID->qual_begin(), 4236 E = rhsQID->qual_end(); I != E; ++I) { 4237 // when comparing an id<P> on lhs with a static type on rhs, 4238 // see if static class implements all of id's protocols, directly or 4239 // through its super class and categories. 4240 if (lhsID->ClassImplementsProtocol(*I, true)) { 4241 match = true; 4242 break; 4243 } 4244 } 4245 if (!match) 4246 return false; 4247 } 4248 return true; 4249 } 4250 // Both the right and left sides have qualifiers. 4251 for (ObjCObjectPointerType::qual_iterator I = lhsOPT->qual_begin(), 4252 E = lhsOPT->qual_end(); I != E; ++I) { 4253 ObjCProtocolDecl *lhsProto = *I; 4254 bool match = false; 4255 4256 // when comparing an id<P> on lhs with a static type on rhs, 4257 // see if static class implements all of id's protocols, directly or 4258 // through its super class and categories. 4259 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 4260 E = rhsQID->qual_end(); J != E; ++J) { 4261 ObjCProtocolDecl *rhsProto = *J; 4262 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4263 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4264 match = true; 4265 break; 4266 } 4267 } 4268 if (!match) 4269 return false; 4270 } 4271 return true; 4272 } 4273 return false; 4274} 4275 4276/// canAssignObjCInterfaces - Return true if the two interface types are 4277/// compatible for assignment from RHS to LHS. This handles validation of any 4278/// protocol qualifiers on the LHS or RHS. 4279/// 4280bool ASTContext::canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 4281 const ObjCObjectPointerType *RHSOPT) { 4282 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 4283 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 4284 4285 // If either type represents the built-in 'id' or 'Class' types, return true. 4286 if (LHS->isObjCUnqualifiedIdOrClass() || 4287 RHS->isObjCUnqualifiedIdOrClass()) 4288 return true; 4289 4290 if (LHS->isObjCQualifiedId() || RHS->isObjCQualifiedId()) 4291 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4292 QualType(RHSOPT,0), 4293 false); 4294 4295 // If we have 2 user-defined types, fall into that path. 4296 if (LHS->getInterface() && RHS->getInterface()) 4297 return canAssignObjCInterfaces(LHS, RHS); 4298 4299 return false; 4300} 4301 4302/// canAssignObjCInterfacesInBlockPointer - This routine is specifically written 4303/// for providing type-safty for objective-c pointers used to pass/return 4304/// arguments in block literals. When passed as arguments, passing 'A*' where 4305/// 'id' is expected is not OK. Passing 'Sub *" where 'Super *" is expected is 4306/// not OK. For the return type, the opposite is not OK. 4307bool ASTContext::canAssignObjCInterfacesInBlockPointer( 4308 const ObjCObjectPointerType *LHSOPT, 4309 const ObjCObjectPointerType *RHSOPT) { 4310 if (RHSOPT->isObjCBuiltinType() || LHSOPT->isObjCIdType()) 4311 return true; 4312 4313 if (LHSOPT->isObjCBuiltinType()) { 4314 return RHSOPT->isObjCBuiltinType() || RHSOPT->isObjCQualifiedIdType(); 4315 } 4316 4317 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 4318 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4319 QualType(RHSOPT,0), 4320 false); 4321 4322 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4323 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4324 if (LHS && RHS) { // We have 2 user-defined types. 4325 if (LHS != RHS) { 4326 if (LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 4327 return false; 4328 if (RHS->getDecl()->isSuperClassOf(LHS->getDecl())) 4329 return true; 4330 } 4331 else 4332 return true; 4333 } 4334 return false; 4335} 4336 4337/// getIntersectionOfProtocols - This routine finds the intersection of set 4338/// of protocols inherited from two distinct objective-c pointer objects. 4339/// It is used to build composite qualifier list of the composite type of 4340/// the conditional expression involving two objective-c pointer objects. 4341static 4342void getIntersectionOfProtocols(ASTContext &Context, 4343 const ObjCObjectPointerType *LHSOPT, 4344 const ObjCObjectPointerType *RHSOPT, 4345 llvm::SmallVectorImpl<ObjCProtocolDecl *> &IntersectionOfProtocols) { 4346 4347 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 4348 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 4349 assert(LHS->getInterface() && "LHS must have an interface base"); 4350 assert(RHS->getInterface() && "RHS must have an interface base"); 4351 4352 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> InheritedProtocolSet; 4353 unsigned LHSNumProtocols = LHS->getNumProtocols(); 4354 if (LHSNumProtocols > 0) 4355 InheritedProtocolSet.insert(LHS->qual_begin(), LHS->qual_end()); 4356 else { 4357 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 4358 Context.CollectInheritedProtocols(LHS->getInterface(), 4359 LHSInheritedProtocols); 4360 InheritedProtocolSet.insert(LHSInheritedProtocols.begin(), 4361 LHSInheritedProtocols.end()); 4362 } 4363 4364 unsigned RHSNumProtocols = RHS->getNumProtocols(); 4365 if (RHSNumProtocols > 0) { 4366 ObjCProtocolDecl **RHSProtocols = 4367 const_cast<ObjCProtocolDecl **>(RHS->qual_begin()); 4368 for (unsigned i = 0; i < RHSNumProtocols; ++i) 4369 if (InheritedProtocolSet.count(RHSProtocols[i])) 4370 IntersectionOfProtocols.push_back(RHSProtocols[i]); 4371 } 4372 else { 4373 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> RHSInheritedProtocols; 4374 Context.CollectInheritedProtocols(RHS->getInterface(), 4375 RHSInheritedProtocols); 4376 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 4377 RHSInheritedProtocols.begin(), 4378 E = RHSInheritedProtocols.end(); I != E; ++I) 4379 if (InheritedProtocolSet.count((*I))) 4380 IntersectionOfProtocols.push_back((*I)); 4381 } 4382} 4383 4384/// areCommonBaseCompatible - Returns common base class of the two classes if 4385/// one found. Note that this is O'2 algorithm. But it will be called as the 4386/// last type comparison in a ?-exp of ObjC pointer types before a 4387/// warning is issued. So, its invokation is extremely rare. 4388QualType ASTContext::areCommonBaseCompatible( 4389 const ObjCObjectPointerType *Lptr, 4390 const ObjCObjectPointerType *Rptr) { 4391 const ObjCObjectType *LHS = Lptr->getObjectType(); 4392 const ObjCObjectType *RHS = Rptr->getObjectType(); 4393 const ObjCInterfaceDecl* LDecl = LHS->getInterface(); 4394 const ObjCInterfaceDecl* RDecl = RHS->getInterface(); 4395 if (!LDecl || !RDecl) 4396 return QualType(); 4397 4398 while ((LDecl = LDecl->getSuperClass())) { 4399 LHS = cast<ObjCInterfaceType>(getObjCInterfaceType(LDecl)); 4400 if (canAssignObjCInterfaces(LHS, RHS)) { 4401 llvm::SmallVector<ObjCProtocolDecl *, 8> Protocols; 4402 getIntersectionOfProtocols(*this, Lptr, Rptr, Protocols); 4403 4404 QualType Result = QualType(LHS, 0); 4405 if (!Protocols.empty()) 4406 Result = getObjCObjectType(Result, Protocols.data(), Protocols.size()); 4407 Result = getObjCObjectPointerType(Result); 4408 return Result; 4409 } 4410 } 4411 4412 return QualType(); 4413} 4414 4415bool ASTContext::canAssignObjCInterfaces(const ObjCObjectType *LHS, 4416 const ObjCObjectType *RHS) { 4417 assert(LHS->getInterface() && "LHS is not an interface type"); 4418 assert(RHS->getInterface() && "RHS is not an interface type"); 4419 4420 // Verify that the base decls are compatible: the RHS must be a subclass of 4421 // the LHS. 4422 if (!LHS->getInterface()->isSuperClassOf(RHS->getInterface())) 4423 return false; 4424 4425 // RHS must have a superset of the protocols in the LHS. If the LHS is not 4426 // protocol qualified at all, then we are good. 4427 if (LHS->getNumProtocols() == 0) 4428 return true; 4429 4430 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, then it 4431 // isn't a superset. 4432 if (RHS->getNumProtocols() == 0) 4433 return true; // FIXME: should return false! 4434 4435 for (ObjCObjectType::qual_iterator LHSPI = LHS->qual_begin(), 4436 LHSPE = LHS->qual_end(); 4437 LHSPI != LHSPE; LHSPI++) { 4438 bool RHSImplementsProtocol = false; 4439 4440 // If the RHS doesn't implement the protocol on the left, the types 4441 // are incompatible. 4442 for (ObjCObjectType::qual_iterator RHSPI = RHS->qual_begin(), 4443 RHSPE = RHS->qual_end(); 4444 RHSPI != RHSPE; RHSPI++) { 4445 if ((*RHSPI)->lookupProtocolNamed((*LHSPI)->getIdentifier())) { 4446 RHSImplementsProtocol = true; 4447 break; 4448 } 4449 } 4450 // FIXME: For better diagnostics, consider passing back the protocol name. 4451 if (!RHSImplementsProtocol) 4452 return false; 4453 } 4454 // The RHS implements all protocols listed on the LHS. 4455 return true; 4456} 4457 4458bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) { 4459 // get the "pointed to" types 4460 const ObjCObjectPointerType *LHSOPT = LHS->getAs<ObjCObjectPointerType>(); 4461 const ObjCObjectPointerType *RHSOPT = RHS->getAs<ObjCObjectPointerType>(); 4462 4463 if (!LHSOPT || !RHSOPT) 4464 return false; 4465 4466 return canAssignObjCInterfaces(LHSOPT, RHSOPT) || 4467 canAssignObjCInterfaces(RHSOPT, LHSOPT); 4468} 4469 4470/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible, 4471/// both shall have the identically qualified version of a compatible type. 4472/// C99 6.2.7p1: Two types have compatible types if their types are the 4473/// same. See 6.7.[2,3,5] for additional rules. 4474bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS) { 4475 if (getLangOptions().CPlusPlus) 4476 return hasSameType(LHS, RHS); 4477 4478 return !mergeTypes(LHS, RHS).isNull(); 4479} 4480 4481bool ASTContext::typesAreBlockPointerCompatible(QualType LHS, QualType RHS) { 4482 return !mergeTypes(LHS, RHS, true).isNull(); 4483} 4484 4485QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs, 4486 bool OfBlockPointer) { 4487 const FunctionType *lbase = lhs->getAs<FunctionType>(); 4488 const FunctionType *rbase = rhs->getAs<FunctionType>(); 4489 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 4490 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 4491 bool allLTypes = true; 4492 bool allRTypes = true; 4493 4494 // Check return type 4495 QualType retType; 4496 if (OfBlockPointer) 4497 retType = mergeTypes(rbase->getResultType(), lbase->getResultType(), true); 4498 else 4499 retType = mergeTypes(lbase->getResultType(), rbase->getResultType()); 4500 if (retType.isNull()) return QualType(); 4501 if (getCanonicalType(retType) != getCanonicalType(lbase->getResultType())) 4502 allLTypes = false; 4503 if (getCanonicalType(retType) != getCanonicalType(rbase->getResultType())) 4504 allRTypes = false; 4505 // FIXME: double check this 4506 // FIXME: should we error if lbase->getRegParmAttr() != 0 && 4507 // rbase->getRegParmAttr() != 0 && 4508 // lbase->getRegParmAttr() != rbase->getRegParmAttr()? 4509 FunctionType::ExtInfo lbaseInfo = lbase->getExtInfo(); 4510 FunctionType::ExtInfo rbaseInfo = rbase->getExtInfo(); 4511 unsigned RegParm = lbaseInfo.getRegParm() == 0 ? rbaseInfo.getRegParm() : 4512 lbaseInfo.getRegParm(); 4513 bool NoReturn = lbaseInfo.getNoReturn() || rbaseInfo.getNoReturn(); 4514 if (NoReturn != lbaseInfo.getNoReturn() || 4515 RegParm != lbaseInfo.getRegParm()) 4516 allLTypes = false; 4517 if (NoReturn != rbaseInfo.getNoReturn() || 4518 RegParm != rbaseInfo.getRegParm()) 4519 allRTypes = false; 4520 CallingConv lcc = lbaseInfo.getCC(); 4521 CallingConv rcc = rbaseInfo.getCC(); 4522 // Compatible functions must have compatible calling conventions 4523 if (!isSameCallConv(lcc, rcc)) 4524 return QualType(); 4525 4526 if (lproto && rproto) { // two C99 style function prototypes 4527 assert(!lproto->hasExceptionSpec() && !rproto->hasExceptionSpec() && 4528 "C++ shouldn't be here"); 4529 unsigned lproto_nargs = lproto->getNumArgs(); 4530 unsigned rproto_nargs = rproto->getNumArgs(); 4531 4532 // Compatible functions must have the same number of arguments 4533 if (lproto_nargs != rproto_nargs) 4534 return QualType(); 4535 4536 // Variadic and non-variadic functions aren't compatible 4537 if (lproto->isVariadic() != rproto->isVariadic()) 4538 return QualType(); 4539 4540 if (lproto->getTypeQuals() != rproto->getTypeQuals()) 4541 return QualType(); 4542 4543 // Check argument compatibility 4544 llvm::SmallVector<QualType, 10> types; 4545 for (unsigned i = 0; i < lproto_nargs; i++) { 4546 QualType largtype = lproto->getArgType(i).getUnqualifiedType(); 4547 QualType rargtype = rproto->getArgType(i).getUnqualifiedType(); 4548 QualType argtype = mergeTypes(largtype, rargtype, OfBlockPointer); 4549 if (argtype.isNull()) return QualType(); 4550 types.push_back(argtype); 4551 if (getCanonicalType(argtype) != getCanonicalType(largtype)) 4552 allLTypes = false; 4553 if (getCanonicalType(argtype) != getCanonicalType(rargtype)) 4554 allRTypes = false; 4555 } 4556 if (allLTypes) return lhs; 4557 if (allRTypes) return rhs; 4558 return getFunctionType(retType, types.begin(), types.size(), 4559 lproto->isVariadic(), lproto->getTypeQuals(), 4560 false, false, 0, 0, 4561 FunctionType::ExtInfo(NoReturn, RegParm, lcc)); 4562 } 4563 4564 if (lproto) allRTypes = false; 4565 if (rproto) allLTypes = false; 4566 4567 const FunctionProtoType *proto = lproto ? lproto : rproto; 4568 if (proto) { 4569 assert(!proto->hasExceptionSpec() && "C++ shouldn't be here"); 4570 if (proto->isVariadic()) return QualType(); 4571 // Check that the types are compatible with the types that 4572 // would result from default argument promotions (C99 6.7.5.3p15). 4573 // The only types actually affected are promotable integer 4574 // types and floats, which would be passed as a different 4575 // type depending on whether the prototype is visible. 4576 unsigned proto_nargs = proto->getNumArgs(); 4577 for (unsigned i = 0; i < proto_nargs; ++i) { 4578 QualType argTy = proto->getArgType(i); 4579 4580 // Look at the promotion type of enum types, since that is the type used 4581 // to pass enum values. 4582 if (const EnumType *Enum = argTy->getAs<EnumType>()) 4583 argTy = Enum->getDecl()->getPromotionType(); 4584 4585 if (argTy->isPromotableIntegerType() || 4586 getCanonicalType(argTy).getUnqualifiedType() == FloatTy) 4587 return QualType(); 4588 } 4589 4590 if (allLTypes) return lhs; 4591 if (allRTypes) return rhs; 4592 return getFunctionType(retType, proto->arg_type_begin(), 4593 proto->getNumArgs(), proto->isVariadic(), 4594 proto->getTypeQuals(), 4595 false, false, 0, 0, 4596 FunctionType::ExtInfo(NoReturn, RegParm, lcc)); 4597 } 4598 4599 if (allLTypes) return lhs; 4600 if (allRTypes) return rhs; 4601 FunctionType::ExtInfo Info(NoReturn, RegParm, lcc); 4602 return getFunctionNoProtoType(retType, Info); 4603} 4604 4605QualType ASTContext::mergeTypes(QualType LHS, QualType RHS, 4606 bool OfBlockPointer) { 4607 // C++ [expr]: If an expression initially has the type "reference to T", the 4608 // type is adjusted to "T" prior to any further analysis, the expression 4609 // designates the object or function denoted by the reference, and the 4610 // expression is an lvalue unless the reference is an rvalue reference and 4611 // the expression is a function call (possibly inside parentheses). 4612 assert(!LHS->getAs<ReferenceType>() && "LHS is a reference type?"); 4613 assert(!RHS->getAs<ReferenceType>() && "RHS is a reference type?"); 4614 4615 QualType LHSCan = getCanonicalType(LHS), 4616 RHSCan = getCanonicalType(RHS); 4617 4618 // If two types are identical, they are compatible. 4619 if (LHSCan == RHSCan) 4620 return LHS; 4621 4622 // If the qualifiers are different, the types aren't compatible... mostly. 4623 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 4624 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 4625 if (LQuals != RQuals) { 4626 // If any of these qualifiers are different, we have a type 4627 // mismatch. 4628 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 4629 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 4630 return QualType(); 4631 4632 // Exactly one GC qualifier difference is allowed: __strong is 4633 // okay if the other type has no GC qualifier but is an Objective 4634 // C object pointer (i.e. implicitly strong by default). We fix 4635 // this by pretending that the unqualified type was actually 4636 // qualified __strong. 4637 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 4638 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 4639 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 4640 4641 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 4642 return QualType(); 4643 4644 if (GC_L == Qualifiers::Strong && RHSCan->isObjCObjectPointerType()) { 4645 return mergeTypes(LHS, getObjCGCQualType(RHS, Qualifiers::Strong)); 4646 } 4647 if (GC_R == Qualifiers::Strong && LHSCan->isObjCObjectPointerType()) { 4648 return mergeTypes(getObjCGCQualType(LHS, Qualifiers::Strong), RHS); 4649 } 4650 return QualType(); 4651 } 4652 4653 // Okay, qualifiers are equal. 4654 4655 Type::TypeClass LHSClass = LHSCan->getTypeClass(); 4656 Type::TypeClass RHSClass = RHSCan->getTypeClass(); 4657 4658 // We want to consider the two function types to be the same for these 4659 // comparisons, just force one to the other. 4660 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto; 4661 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto; 4662 4663 // Same as above for arrays 4664 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray) 4665 LHSClass = Type::ConstantArray; 4666 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray) 4667 RHSClass = Type::ConstantArray; 4668 4669 // ObjCInterfaces are just specialized ObjCObjects. 4670 if (LHSClass == Type::ObjCInterface) LHSClass = Type::ObjCObject; 4671 if (RHSClass == Type::ObjCInterface) RHSClass = Type::ObjCObject; 4672 4673 // Canonicalize ExtVector -> Vector. 4674 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector; 4675 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector; 4676 4677 // If the canonical type classes don't match. 4678 if (LHSClass != RHSClass) { 4679 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char, 4680 // a signed integer type, or an unsigned integer type. 4681 // Compatibility is based on the underlying type, not the promotion 4682 // type. 4683 if (const EnumType* ETy = LHS->getAs<EnumType>()) { 4684 if (ETy->getDecl()->getIntegerType() == RHSCan.getUnqualifiedType()) 4685 return RHS; 4686 } 4687 if (const EnumType* ETy = RHS->getAs<EnumType>()) { 4688 if (ETy->getDecl()->getIntegerType() == LHSCan.getUnqualifiedType()) 4689 return LHS; 4690 } 4691 4692 return QualType(); 4693 } 4694 4695 // The canonical type classes match. 4696 switch (LHSClass) { 4697#define TYPE(Class, Base) 4698#define ABSTRACT_TYPE(Class, Base) 4699#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) case Type::Class: 4700#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 4701#define DEPENDENT_TYPE(Class, Base) case Type::Class: 4702#include "clang/AST/TypeNodes.def" 4703 assert(false && "Non-canonical and dependent types shouldn't get here"); 4704 return QualType(); 4705 4706 case Type::LValueReference: 4707 case Type::RValueReference: 4708 case Type::MemberPointer: 4709 assert(false && "C++ should never be in mergeTypes"); 4710 return QualType(); 4711 4712 case Type::ObjCInterface: 4713 case Type::IncompleteArray: 4714 case Type::VariableArray: 4715 case Type::FunctionProto: 4716 case Type::ExtVector: 4717 assert(false && "Types are eliminated above"); 4718 return QualType(); 4719 4720 case Type::Pointer: 4721 { 4722 // Merge two pointer types, while trying to preserve typedef info 4723 QualType LHSPointee = LHS->getAs<PointerType>()->getPointeeType(); 4724 QualType RHSPointee = RHS->getAs<PointerType>()->getPointeeType(); 4725 QualType ResultType = mergeTypes(LHSPointee, RHSPointee); 4726 if (ResultType.isNull()) return QualType(); 4727 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 4728 return LHS; 4729 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 4730 return RHS; 4731 return getPointerType(ResultType); 4732 } 4733 case Type::BlockPointer: 4734 { 4735 // Merge two block pointer types, while trying to preserve typedef info 4736 QualType LHSPointee = LHS->getAs<BlockPointerType>()->getPointeeType(); 4737 QualType RHSPointee = RHS->getAs<BlockPointerType>()->getPointeeType(); 4738 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, OfBlockPointer); 4739 if (ResultType.isNull()) return QualType(); 4740 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 4741 return LHS; 4742 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 4743 return RHS; 4744 return getBlockPointerType(ResultType); 4745 } 4746 case Type::ConstantArray: 4747 { 4748 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS); 4749 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS); 4750 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize()) 4751 return QualType(); 4752 4753 QualType LHSElem = getAsArrayType(LHS)->getElementType(); 4754 QualType RHSElem = getAsArrayType(RHS)->getElementType(); 4755 QualType ResultType = mergeTypes(LHSElem, RHSElem); 4756 if (ResultType.isNull()) return QualType(); 4757 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 4758 return LHS; 4759 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 4760 return RHS; 4761 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(), 4762 ArrayType::ArraySizeModifier(), 0); 4763 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(), 4764 ArrayType::ArraySizeModifier(), 0); 4765 const VariableArrayType* LVAT = getAsVariableArrayType(LHS); 4766 const VariableArrayType* RVAT = getAsVariableArrayType(RHS); 4767 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 4768 return LHS; 4769 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 4770 return RHS; 4771 if (LVAT) { 4772 // FIXME: This isn't correct! But tricky to implement because 4773 // the array's size has to be the size of LHS, but the type 4774 // has to be different. 4775 return LHS; 4776 } 4777 if (RVAT) { 4778 // FIXME: This isn't correct! But tricky to implement because 4779 // the array's size has to be the size of RHS, but the type 4780 // has to be different. 4781 return RHS; 4782 } 4783 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS; 4784 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS; 4785 return getIncompleteArrayType(ResultType, 4786 ArrayType::ArraySizeModifier(), 0); 4787 } 4788 case Type::FunctionNoProto: 4789 return mergeFunctionTypes(LHS, RHS, OfBlockPointer); 4790 case Type::Record: 4791 case Type::Enum: 4792 return QualType(); 4793 case Type::Builtin: 4794 // Only exactly equal builtin types are compatible, which is tested above. 4795 return QualType(); 4796 case Type::Complex: 4797 // Distinct complex types are incompatible. 4798 return QualType(); 4799 case Type::Vector: 4800 // FIXME: The merged type should be an ExtVector! 4801 if (areCompatVectorTypes(LHSCan->getAs<VectorType>(), 4802 RHSCan->getAs<VectorType>())) 4803 return LHS; 4804 return QualType(); 4805 case Type::ObjCObject: { 4806 // Check if the types are assignment compatible. 4807 // FIXME: This should be type compatibility, e.g. whether 4808 // "LHS x; RHS x;" at global scope is legal. 4809 const ObjCObjectType* LHSIface = LHS->getAs<ObjCObjectType>(); 4810 const ObjCObjectType* RHSIface = RHS->getAs<ObjCObjectType>(); 4811 if (canAssignObjCInterfaces(LHSIface, RHSIface)) 4812 return LHS; 4813 4814 return QualType(); 4815 } 4816 case Type::ObjCObjectPointer: { 4817 if (OfBlockPointer) { 4818 if (canAssignObjCInterfacesInBlockPointer( 4819 LHS->getAs<ObjCObjectPointerType>(), 4820 RHS->getAs<ObjCObjectPointerType>())) 4821 return LHS; 4822 return QualType(); 4823 } 4824 if (canAssignObjCInterfaces(LHS->getAs<ObjCObjectPointerType>(), 4825 RHS->getAs<ObjCObjectPointerType>())) 4826 return LHS; 4827 4828 return QualType(); 4829 } 4830 } 4831 4832 return QualType(); 4833} 4834 4835/// mergeObjCGCQualifiers - This routine merges ObjC's GC attribute of 'LHS' and 4836/// 'RHS' attributes and returns the merged version; including for function 4837/// return types. 4838QualType ASTContext::mergeObjCGCQualifiers(QualType LHS, QualType RHS) { 4839 QualType LHSCan = getCanonicalType(LHS), 4840 RHSCan = getCanonicalType(RHS); 4841 // If two types are identical, they are compatible. 4842 if (LHSCan == RHSCan) 4843 return LHS; 4844 if (RHSCan->isFunctionType()) { 4845 if (!LHSCan->isFunctionType()) 4846 return QualType(); 4847 QualType OldReturnType = 4848 cast<FunctionType>(RHSCan.getTypePtr())->getResultType(); 4849 QualType NewReturnType = 4850 cast<FunctionType>(LHSCan.getTypePtr())->getResultType(); 4851 QualType ResReturnType = 4852 mergeObjCGCQualifiers(NewReturnType, OldReturnType); 4853 if (ResReturnType.isNull()) 4854 return QualType(); 4855 if (ResReturnType == NewReturnType || ResReturnType == OldReturnType) { 4856 // id foo(); ... __strong id foo(); or: __strong id foo(); ... id foo(); 4857 // In either case, use OldReturnType to build the new function type. 4858 const FunctionType *F = LHS->getAs<FunctionType>(); 4859 if (const FunctionProtoType *FPT = cast<FunctionProtoType>(F)) { 4860 FunctionType::ExtInfo Info = getFunctionExtInfo(LHS); 4861 QualType ResultType 4862 = getFunctionType(OldReturnType, FPT->arg_type_begin(), 4863 FPT->getNumArgs(), FPT->isVariadic(), 4864 FPT->getTypeQuals(), 4865 FPT->hasExceptionSpec(), 4866 FPT->hasAnyExceptionSpec(), 4867 FPT->getNumExceptions(), 4868 FPT->exception_begin(), 4869 Info); 4870 return ResultType; 4871 } 4872 } 4873 return QualType(); 4874 } 4875 4876 // If the qualifiers are different, the types can still be merged. 4877 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 4878 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 4879 if (LQuals != RQuals) { 4880 // If any of these qualifiers are different, we have a type mismatch. 4881 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 4882 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 4883 return QualType(); 4884 4885 // Exactly one GC qualifier difference is allowed: __strong is 4886 // okay if the other type has no GC qualifier but is an Objective 4887 // C object pointer (i.e. implicitly strong by default). We fix 4888 // this by pretending that the unqualified type was actually 4889 // qualified __strong. 4890 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 4891 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 4892 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 4893 4894 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 4895 return QualType(); 4896 4897 if (GC_L == Qualifiers::Strong) 4898 return LHS; 4899 if (GC_R == Qualifiers::Strong) 4900 return RHS; 4901 return QualType(); 4902 } 4903 4904 if (LHSCan->isObjCObjectPointerType() && RHSCan->isObjCObjectPointerType()) { 4905 QualType LHSBaseQT = LHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 4906 QualType RHSBaseQT = RHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 4907 QualType ResQT = mergeObjCGCQualifiers(LHSBaseQT, RHSBaseQT); 4908 if (ResQT == LHSBaseQT) 4909 return LHS; 4910 if (ResQT == RHSBaseQT) 4911 return RHS; 4912 } 4913 return QualType(); 4914} 4915 4916//===----------------------------------------------------------------------===// 4917// Integer Predicates 4918//===----------------------------------------------------------------------===// 4919 4920unsigned ASTContext::getIntWidth(QualType T) { 4921 if (T->isBooleanType()) 4922 return 1; 4923 if (EnumType *ET = dyn_cast<EnumType>(T)) 4924 T = ET->getDecl()->getIntegerType(); 4925 // For builtin types, just use the standard type sizing method 4926 return (unsigned)getTypeSize(T); 4927} 4928 4929QualType ASTContext::getCorrespondingUnsignedType(QualType T) { 4930 assert(T->isSignedIntegerType() && "Unexpected type"); 4931 4932 // Turn <4 x signed int> -> <4 x unsigned int> 4933 if (const VectorType *VTy = T->getAs<VectorType>()) 4934 return getVectorType(getCorrespondingUnsignedType(VTy->getElementType()), 4935 VTy->getNumElements(), VTy->isAltiVec(), VTy->isPixel()); 4936 4937 // For enums, we return the unsigned version of the base type. 4938 if (const EnumType *ETy = T->getAs<EnumType>()) 4939 T = ETy->getDecl()->getIntegerType(); 4940 4941 const BuiltinType *BTy = T->getAs<BuiltinType>(); 4942 assert(BTy && "Unexpected signed integer type"); 4943 switch (BTy->getKind()) { 4944 case BuiltinType::Char_S: 4945 case BuiltinType::SChar: 4946 return UnsignedCharTy; 4947 case BuiltinType::Short: 4948 return UnsignedShortTy; 4949 case BuiltinType::Int: 4950 return UnsignedIntTy; 4951 case BuiltinType::Long: 4952 return UnsignedLongTy; 4953 case BuiltinType::LongLong: 4954 return UnsignedLongLongTy; 4955 case BuiltinType::Int128: 4956 return UnsignedInt128Ty; 4957 default: 4958 assert(0 && "Unexpected signed integer type"); 4959 return QualType(); 4960 } 4961} 4962 4963ExternalASTSource::~ExternalASTSource() { } 4964 4965void ExternalASTSource::PrintStats() { } 4966 4967 4968//===----------------------------------------------------------------------===// 4969// Builtin Type Computation 4970//===----------------------------------------------------------------------===// 4971 4972/// DecodeTypeFromStr - This decodes one type descriptor from Str, advancing the 4973/// pointer over the consumed characters. This returns the resultant type. 4974static QualType DecodeTypeFromStr(const char *&Str, ASTContext &Context, 4975 ASTContext::GetBuiltinTypeError &Error, 4976 bool AllowTypeModifiers = true) { 4977 // Modifiers. 4978 int HowLong = 0; 4979 bool Signed = false, Unsigned = false; 4980 4981 // Read the modifiers first. 4982 bool Done = false; 4983 while (!Done) { 4984 switch (*Str++) { 4985 default: Done = true; --Str; break; 4986 case 'S': 4987 assert(!Unsigned && "Can't use both 'S' and 'U' modifiers!"); 4988 assert(!Signed && "Can't use 'S' modifier multiple times!"); 4989 Signed = true; 4990 break; 4991 case 'U': 4992 assert(!Signed && "Can't use both 'S' and 'U' modifiers!"); 4993 assert(!Unsigned && "Can't use 'S' modifier multiple times!"); 4994 Unsigned = true; 4995 break; 4996 case 'L': 4997 assert(HowLong <= 2 && "Can't have LLLL modifier"); 4998 ++HowLong; 4999 break; 5000 } 5001 } 5002 5003 QualType Type; 5004 5005 // Read the base type. 5006 switch (*Str++) { 5007 default: assert(0 && "Unknown builtin type letter!"); 5008 case 'v': 5009 assert(HowLong == 0 && !Signed && !Unsigned && 5010 "Bad modifiers used with 'v'!"); 5011 Type = Context.VoidTy; 5012 break; 5013 case 'f': 5014 assert(HowLong == 0 && !Signed && !Unsigned && 5015 "Bad modifiers used with 'f'!"); 5016 Type = Context.FloatTy; 5017 break; 5018 case 'd': 5019 assert(HowLong < 2 && !Signed && !Unsigned && 5020 "Bad modifiers used with 'd'!"); 5021 if (HowLong) 5022 Type = Context.LongDoubleTy; 5023 else 5024 Type = Context.DoubleTy; 5025 break; 5026 case 's': 5027 assert(HowLong == 0 && "Bad modifiers used with 's'!"); 5028 if (Unsigned) 5029 Type = Context.UnsignedShortTy; 5030 else 5031 Type = Context.ShortTy; 5032 break; 5033 case 'i': 5034 if (HowLong == 3) 5035 Type = Unsigned ? Context.UnsignedInt128Ty : Context.Int128Ty; 5036 else if (HowLong == 2) 5037 Type = Unsigned ? Context.UnsignedLongLongTy : Context.LongLongTy; 5038 else if (HowLong == 1) 5039 Type = Unsigned ? Context.UnsignedLongTy : Context.LongTy; 5040 else 5041 Type = Unsigned ? Context.UnsignedIntTy : Context.IntTy; 5042 break; 5043 case 'c': 5044 assert(HowLong == 0 && "Bad modifiers used with 'c'!"); 5045 if (Signed) 5046 Type = Context.SignedCharTy; 5047 else if (Unsigned) 5048 Type = Context.UnsignedCharTy; 5049 else 5050 Type = Context.CharTy; 5051 break; 5052 case 'b': // boolean 5053 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'b'!"); 5054 Type = Context.BoolTy; 5055 break; 5056 case 'z': // size_t. 5057 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'z'!"); 5058 Type = Context.getSizeType(); 5059 break; 5060 case 'F': 5061 Type = Context.getCFConstantStringType(); 5062 break; 5063 case 'a': 5064 Type = Context.getBuiltinVaListType(); 5065 assert(!Type.isNull() && "builtin va list type not initialized!"); 5066 break; 5067 case 'A': 5068 // This is a "reference" to a va_list; however, what exactly 5069 // this means depends on how va_list is defined. There are two 5070 // different kinds of va_list: ones passed by value, and ones 5071 // passed by reference. An example of a by-value va_list is 5072 // x86, where va_list is a char*. An example of by-ref va_list 5073 // is x86-64, where va_list is a __va_list_tag[1]. For x86, 5074 // we want this argument to be a char*&; for x86-64, we want 5075 // it to be a __va_list_tag*. 5076 Type = Context.getBuiltinVaListType(); 5077 assert(!Type.isNull() && "builtin va list type not initialized!"); 5078 if (Type->isArrayType()) { 5079 Type = Context.getArrayDecayedType(Type); 5080 } else { 5081 Type = Context.getLValueReferenceType(Type); 5082 } 5083 break; 5084 case 'V': { 5085 char *End; 5086 unsigned NumElements = strtoul(Str, &End, 10); 5087 assert(End != Str && "Missing vector size"); 5088 5089 Str = End; 5090 5091 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 5092 // FIXME: Don't know what to do about AltiVec. 5093 Type = Context.getVectorType(ElementType, NumElements, false, false); 5094 break; 5095 } 5096 case 'X': { 5097 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 5098 Type = Context.getComplexType(ElementType); 5099 break; 5100 } 5101 case 'P': 5102 Type = Context.getFILEType(); 5103 if (Type.isNull()) { 5104 Error = ASTContext::GE_Missing_stdio; 5105 return QualType(); 5106 } 5107 break; 5108 case 'J': 5109 if (Signed) 5110 Type = Context.getsigjmp_bufType(); 5111 else 5112 Type = Context.getjmp_bufType(); 5113 5114 if (Type.isNull()) { 5115 Error = ASTContext::GE_Missing_setjmp; 5116 return QualType(); 5117 } 5118 break; 5119 } 5120 5121 if (!AllowTypeModifiers) 5122 return Type; 5123 5124 Done = false; 5125 while (!Done) { 5126 switch (char c = *Str++) { 5127 default: Done = true; --Str; break; 5128 case '*': 5129 case '&': 5130 { 5131 // Both pointers and references can have their pointee types 5132 // qualified with an address space. 5133 char *End; 5134 unsigned AddrSpace = strtoul(Str, &End, 10); 5135 if (End != Str && AddrSpace != 0) { 5136 Type = Context.getAddrSpaceQualType(Type, AddrSpace); 5137 Str = End; 5138 } 5139 } 5140 if (c == '*') 5141 Type = Context.getPointerType(Type); 5142 else 5143 Type = Context.getLValueReferenceType(Type); 5144 break; 5145 // FIXME: There's no way to have a built-in with an rvalue ref arg. 5146 case 'C': 5147 Type = Type.withConst(); 5148 break; 5149 case 'D': 5150 Type = Context.getVolatileType(Type); 5151 break; 5152 } 5153 } 5154 5155 return Type; 5156} 5157 5158/// GetBuiltinType - Return the type for the specified builtin. 5159QualType ASTContext::GetBuiltinType(unsigned id, 5160 GetBuiltinTypeError &Error) { 5161 const char *TypeStr = BuiltinInfo.GetTypeString(id); 5162 5163 llvm::SmallVector<QualType, 8> ArgTypes; 5164 5165 Error = GE_None; 5166 QualType ResType = DecodeTypeFromStr(TypeStr, *this, Error); 5167 if (Error != GE_None) 5168 return QualType(); 5169 while (TypeStr[0] && TypeStr[0] != '.') { 5170 QualType Ty = DecodeTypeFromStr(TypeStr, *this, Error); 5171 if (Error != GE_None) 5172 return QualType(); 5173 5174 // Do array -> pointer decay. The builtin should use the decayed type. 5175 if (Ty->isArrayType()) 5176 Ty = getArrayDecayedType(Ty); 5177 5178 ArgTypes.push_back(Ty); 5179 } 5180 5181 assert((TypeStr[0] != '.' || TypeStr[1] == 0) && 5182 "'.' should only occur at end of builtin type list!"); 5183 5184 // handle untyped/variadic arguments "T c99Style();" or "T cppStyle(...);". 5185 if (ArgTypes.size() == 0 && TypeStr[0] == '.') 5186 return getFunctionNoProtoType(ResType); 5187 5188 // FIXME: Should we create noreturn types? 5189 return getFunctionType(ResType, ArgTypes.data(), ArgTypes.size(), 5190 TypeStr[0] == '.', 0, false, false, 0, 0, 5191 FunctionType::ExtInfo()); 5192} 5193 5194QualType 5195ASTContext::UsualArithmeticConversionsType(QualType lhs, QualType rhs) { 5196 // Perform the usual unary conversions. We do this early so that 5197 // integral promotions to "int" can allow us to exit early, in the 5198 // lhs == rhs check. Also, for conversion purposes, we ignore any 5199 // qualifiers. For example, "const float" and "float" are 5200 // equivalent. 5201 if (lhs->isPromotableIntegerType()) 5202 lhs = getPromotedIntegerType(lhs); 5203 else 5204 lhs = lhs.getUnqualifiedType(); 5205 if (rhs->isPromotableIntegerType()) 5206 rhs = getPromotedIntegerType(rhs); 5207 else 5208 rhs = rhs.getUnqualifiedType(); 5209 5210 // If both types are identical, no conversion is needed. 5211 if (lhs == rhs) 5212 return lhs; 5213 5214 // If either side is a non-arithmetic type (e.g. a pointer), we are done. 5215 // The caller can deal with this (e.g. pointer + int). 5216 if (!lhs->isArithmeticType() || !rhs->isArithmeticType()) 5217 return lhs; 5218 5219 // At this point, we have two different arithmetic types. 5220 5221 // Handle complex types first (C99 6.3.1.8p1). 5222 if (lhs->isComplexType() || rhs->isComplexType()) { 5223 // if we have an integer operand, the result is the complex type. 5224 if (rhs->isIntegerType() || rhs->isComplexIntegerType()) { 5225 // convert the rhs to the lhs complex type. 5226 return lhs; 5227 } 5228 if (lhs->isIntegerType() || lhs->isComplexIntegerType()) { 5229 // convert the lhs to the rhs complex type. 5230 return rhs; 5231 } 5232 // This handles complex/complex, complex/float, or float/complex. 5233 // When both operands are complex, the shorter operand is converted to the 5234 // type of the longer, and that is the type of the result. This corresponds 5235 // to what is done when combining two real floating-point operands. 5236 // The fun begins when size promotion occur across type domains. 5237 // From H&S 6.3.4: When one operand is complex and the other is a real 5238 // floating-point type, the less precise type is converted, within it's 5239 // real or complex domain, to the precision of the other type. For example, 5240 // when combining a "long double" with a "double _Complex", the 5241 // "double _Complex" is promoted to "long double _Complex". 5242 int result = getFloatingTypeOrder(lhs, rhs); 5243 5244 if (result > 0) { // The left side is bigger, convert rhs. 5245 rhs = getFloatingTypeOfSizeWithinDomain(lhs, rhs); 5246 } else if (result < 0) { // The right side is bigger, convert lhs. 5247 lhs = getFloatingTypeOfSizeWithinDomain(rhs, lhs); 5248 } 5249 // At this point, lhs and rhs have the same rank/size. Now, make sure the 5250 // domains match. This is a requirement for our implementation, C99 5251 // does not require this promotion. 5252 if (lhs != rhs) { // Domains don't match, we have complex/float mix. 5253 if (lhs->isRealFloatingType()) { // handle "double, _Complex double". 5254 return rhs; 5255 } else { // handle "_Complex double, double". 5256 return lhs; 5257 } 5258 } 5259 return lhs; // The domain/size match exactly. 5260 } 5261 // Now handle "real" floating types (i.e. float, double, long double). 5262 if (lhs->isRealFloatingType() || rhs->isRealFloatingType()) { 5263 // if we have an integer operand, the result is the real floating type. 5264 if (rhs->isIntegerType()) { 5265 // convert rhs to the lhs floating point type. 5266 return lhs; 5267 } 5268 if (rhs->isComplexIntegerType()) { 5269 // convert rhs to the complex floating point type. 5270 return getComplexType(lhs); 5271 } 5272 if (lhs->isIntegerType()) { 5273 // convert lhs to the rhs floating point type. 5274 return rhs; 5275 } 5276 if (lhs->isComplexIntegerType()) { 5277 // convert lhs to the complex floating point type. 5278 return getComplexType(rhs); 5279 } 5280 // We have two real floating types, float/complex combos were handled above. 5281 // Convert the smaller operand to the bigger result. 5282 int result = getFloatingTypeOrder(lhs, rhs); 5283 if (result > 0) // convert the rhs 5284 return lhs; 5285 assert(result < 0 && "illegal float comparison"); 5286 return rhs; // convert the lhs 5287 } 5288 if (lhs->isComplexIntegerType() || rhs->isComplexIntegerType()) { 5289 // Handle GCC complex int extension. 5290 const ComplexType *lhsComplexInt = lhs->getAsComplexIntegerType(); 5291 const ComplexType *rhsComplexInt = rhs->getAsComplexIntegerType(); 5292 5293 if (lhsComplexInt && rhsComplexInt) { 5294 if (getIntegerTypeOrder(lhsComplexInt->getElementType(), 5295 rhsComplexInt->getElementType()) >= 0) 5296 return lhs; // convert the rhs 5297 return rhs; 5298 } else if (lhsComplexInt && rhs->isIntegerType()) { 5299 // convert the rhs to the lhs complex type. 5300 return lhs; 5301 } else if (rhsComplexInt && lhs->isIntegerType()) { 5302 // convert the lhs to the rhs complex type. 5303 return rhs; 5304 } 5305 } 5306 // Finally, we have two differing integer types. 5307 // The rules for this case are in C99 6.3.1.8 5308 int compare = getIntegerTypeOrder(lhs, rhs); 5309 bool lhsSigned = lhs->isSignedIntegerType(), 5310 rhsSigned = rhs->isSignedIntegerType(); 5311 QualType destType; 5312 if (lhsSigned == rhsSigned) { 5313 // Same signedness; use the higher-ranked type 5314 destType = compare >= 0 ? lhs : rhs; 5315 } else if (compare != (lhsSigned ? 1 : -1)) { 5316 // The unsigned type has greater than or equal rank to the 5317 // signed type, so use the unsigned type 5318 destType = lhsSigned ? rhs : lhs; 5319 } else if (getIntWidth(lhs) != getIntWidth(rhs)) { 5320 // The two types are different widths; if we are here, that 5321 // means the signed type is larger than the unsigned type, so 5322 // use the signed type. 5323 destType = lhsSigned ? lhs : rhs; 5324 } else { 5325 // The signed type is higher-ranked than the unsigned type, 5326 // but isn't actually any bigger (like unsigned int and long 5327 // on most 32-bit systems). Use the unsigned type corresponding 5328 // to the signed type. 5329 destType = getCorrespondingUnsignedType(lhsSigned ? lhs : rhs); 5330 } 5331 return destType; 5332} 5333