ASTContext.cpp revision dac54c124e302d6f028ea5723c425b7f66fc7c71
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/ASTMutationListener.h" 24#include "clang/AST/RecordLayout.h" 25#include "clang/AST/Mangle.h" 26#include "clang/Basic/Builtins.h" 27#include "clang/Basic/SourceManager.h" 28#include "clang/Basic/TargetInfo.h" 29#include "llvm/ADT/SmallString.h" 30#include "llvm/ADT/StringExtras.h" 31#include "llvm/Support/MathExtras.h" 32#include "llvm/Support/raw_ostream.h" 33#include "CXXABI.h" 34 35using namespace clang; 36 37unsigned ASTContext::NumImplicitDefaultConstructors; 38unsigned ASTContext::NumImplicitDefaultConstructorsDeclared; 39unsigned ASTContext::NumImplicitCopyConstructors; 40unsigned ASTContext::NumImplicitCopyConstructorsDeclared; 41unsigned ASTContext::NumImplicitCopyAssignmentOperators; 42unsigned ASTContext::NumImplicitCopyAssignmentOperatorsDeclared; 43unsigned ASTContext::NumImplicitDestructors; 44unsigned ASTContext::NumImplicitDestructorsDeclared; 45 46enum FloatingRank { 47 FloatRank, DoubleRank, LongDoubleRank 48}; 49 50void 51ASTContext::CanonicalTemplateTemplateParm::Profile(llvm::FoldingSetNodeID &ID, 52 TemplateTemplateParmDecl *Parm) { 53 ID.AddInteger(Parm->getDepth()); 54 ID.AddInteger(Parm->getPosition()); 55 ID.AddBoolean(Parm->isParameterPack()); 56 57 TemplateParameterList *Params = Parm->getTemplateParameters(); 58 ID.AddInteger(Params->size()); 59 for (TemplateParameterList::const_iterator P = Params->begin(), 60 PEnd = Params->end(); 61 P != PEnd; ++P) { 62 if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*P)) { 63 ID.AddInteger(0); 64 ID.AddBoolean(TTP->isParameterPack()); 65 continue; 66 } 67 68 if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(*P)) { 69 ID.AddInteger(1); 70 ID.AddBoolean(NTTP->isParameterPack()); 71 ID.AddPointer(NTTP->getType().getAsOpaquePtr()); 72 if (NTTP->isExpandedParameterPack()) { 73 ID.AddBoolean(true); 74 ID.AddInteger(NTTP->getNumExpansionTypes()); 75 for (unsigned I = 0, N = NTTP->getNumExpansionTypes(); I != N; ++I) 76 ID.AddPointer(NTTP->getExpansionType(I).getAsOpaquePtr()); 77 } else 78 ID.AddBoolean(false); 79 continue; 80 } 81 82 TemplateTemplateParmDecl *TTP = cast<TemplateTemplateParmDecl>(*P); 83 ID.AddInteger(2); 84 Profile(ID, TTP); 85 } 86} 87 88TemplateTemplateParmDecl * 89ASTContext::getCanonicalTemplateTemplateParmDecl( 90 TemplateTemplateParmDecl *TTP) const { 91 // Check if we already have a canonical template template parameter. 92 llvm::FoldingSetNodeID ID; 93 CanonicalTemplateTemplateParm::Profile(ID, TTP); 94 void *InsertPos = 0; 95 CanonicalTemplateTemplateParm *Canonical 96 = CanonTemplateTemplateParms.FindNodeOrInsertPos(ID, InsertPos); 97 if (Canonical) 98 return Canonical->getParam(); 99 100 // Build a canonical template parameter list. 101 TemplateParameterList *Params = TTP->getTemplateParameters(); 102 llvm::SmallVector<NamedDecl *, 4> CanonParams; 103 CanonParams.reserve(Params->size()); 104 for (TemplateParameterList::const_iterator P = Params->begin(), 105 PEnd = Params->end(); 106 P != PEnd; ++P) { 107 if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*P)) 108 CanonParams.push_back( 109 TemplateTypeParmDecl::Create(*this, getTranslationUnitDecl(), 110 SourceLocation(), TTP->getDepth(), 111 TTP->getIndex(), 0, false, 112 TTP->isParameterPack())); 113 else if (NonTypeTemplateParmDecl *NTTP 114 = dyn_cast<NonTypeTemplateParmDecl>(*P)) { 115 QualType T = getCanonicalType(NTTP->getType()); 116 TypeSourceInfo *TInfo = getTrivialTypeSourceInfo(T); 117 NonTypeTemplateParmDecl *Param; 118 if (NTTP->isExpandedParameterPack()) { 119 llvm::SmallVector<QualType, 2> ExpandedTypes; 120 llvm::SmallVector<TypeSourceInfo *, 2> ExpandedTInfos; 121 for (unsigned I = 0, N = NTTP->getNumExpansionTypes(); I != N; ++I) { 122 ExpandedTypes.push_back(getCanonicalType(NTTP->getExpansionType(I))); 123 ExpandedTInfos.push_back( 124 getTrivialTypeSourceInfo(ExpandedTypes.back())); 125 } 126 127 Param = NonTypeTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 128 SourceLocation(), 129 NTTP->getDepth(), 130 NTTP->getPosition(), 0, 131 T, 132 TInfo, 133 ExpandedTypes.data(), 134 ExpandedTypes.size(), 135 ExpandedTInfos.data()); 136 } else { 137 Param = NonTypeTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 138 SourceLocation(), 139 NTTP->getDepth(), 140 NTTP->getPosition(), 0, 141 T, 142 NTTP->isParameterPack(), 143 TInfo); 144 } 145 CanonParams.push_back(Param); 146 147 } else 148 CanonParams.push_back(getCanonicalTemplateTemplateParmDecl( 149 cast<TemplateTemplateParmDecl>(*P))); 150 } 151 152 TemplateTemplateParmDecl *CanonTTP 153 = TemplateTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 154 SourceLocation(), TTP->getDepth(), 155 TTP->getPosition(), 156 TTP->isParameterPack(), 157 0, 158 TemplateParameterList::Create(*this, SourceLocation(), 159 SourceLocation(), 160 CanonParams.data(), 161 CanonParams.size(), 162 SourceLocation())); 163 164 // Get the new insert position for the node we care about. 165 Canonical = CanonTemplateTemplateParms.FindNodeOrInsertPos(ID, InsertPos); 166 assert(Canonical == 0 && "Shouldn't be in the map!"); 167 (void)Canonical; 168 169 // Create the canonical template template parameter entry. 170 Canonical = new (*this) CanonicalTemplateTemplateParm(CanonTTP); 171 CanonTemplateTemplateParms.InsertNode(Canonical, InsertPos); 172 return CanonTTP; 173} 174 175CXXABI *ASTContext::createCXXABI(const TargetInfo &T) { 176 if (!LangOpts.CPlusPlus) return 0; 177 178 switch (T.getCXXABI()) { 179 case CXXABI_ARM: 180 return CreateARMCXXABI(*this); 181 case CXXABI_Itanium: 182 return CreateItaniumCXXABI(*this); 183 case CXXABI_Microsoft: 184 return CreateMicrosoftCXXABI(*this); 185 } 186 return 0; 187} 188 189ASTContext::ASTContext(const LangOptions& LOpts, SourceManager &SM, 190 const TargetInfo &t, 191 IdentifierTable &idents, SelectorTable &sels, 192 Builtin::Context &builtins, 193 unsigned size_reserve) : 194 TemplateSpecializationTypes(this_()), 195 DependentTemplateSpecializationTypes(this_()), 196 GlobalNestedNameSpecifier(0), IsInt128Installed(false), 197 CFConstantStringTypeDecl(0), NSConstantStringTypeDecl(0), 198 ObjCFastEnumerationStateTypeDecl(0), FILEDecl(0), jmp_bufDecl(0), 199 sigjmp_bufDecl(0), BlockDescriptorType(0), BlockDescriptorExtendedType(0), 200 cudaConfigureCallDecl(0), 201 NullTypeSourceInfo(QualType()), 202 SourceMgr(SM), LangOpts(LOpts), ABI(createCXXABI(t)), Target(t), 203 Idents(idents), Selectors(sels), 204 BuiltinInfo(builtins), 205 DeclarationNames(*this), 206 ExternalSource(0), Listener(0), PrintingPolicy(LOpts), 207 LastSDM(0, 0), 208 UniqueBlockByRefTypeID(0), UniqueBlockParmTypeID(0) { 209 ObjCIdRedefinitionType = QualType(); 210 ObjCClassRedefinitionType = QualType(); 211 ObjCSelRedefinitionType = QualType(); 212 if (size_reserve > 0) Types.reserve(size_reserve); 213 TUDecl = TranslationUnitDecl::Create(*this); 214 InitBuiltinTypes(); 215} 216 217ASTContext::~ASTContext() { 218 // Release the DenseMaps associated with DeclContext objects. 219 // FIXME: Is this the ideal solution? 220 ReleaseDeclContextMaps(); 221 222 // Call all of the deallocation functions. 223 for (unsigned I = 0, N = Deallocations.size(); I != N; ++I) 224 Deallocations[I].first(Deallocations[I].second); 225 226 // Release all of the memory associated with overridden C++ methods. 227 for (llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::iterator 228 OM = OverriddenMethods.begin(), OMEnd = OverriddenMethods.end(); 229 OM != OMEnd; ++OM) 230 OM->second.Destroy(); 231 232 // ASTRecordLayout objects in ASTRecordLayouts must always be destroyed 233 // because they can contain DenseMaps. 234 for (llvm::DenseMap<const ObjCContainerDecl*, 235 const ASTRecordLayout*>::iterator 236 I = ObjCLayouts.begin(), E = ObjCLayouts.end(); I != E; ) 237 // Increment in loop to prevent using deallocated memory. 238 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 239 R->Destroy(*this); 240 241 for (llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*>::iterator 242 I = ASTRecordLayouts.begin(), E = ASTRecordLayouts.end(); I != E; ) { 243 // Increment in loop to prevent using deallocated memory. 244 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 245 R->Destroy(*this); 246 } 247 248 for (llvm::DenseMap<const Decl*, AttrVec*>::iterator A = DeclAttrs.begin(), 249 AEnd = DeclAttrs.end(); 250 A != AEnd; ++A) 251 A->second->~AttrVec(); 252} 253 254void ASTContext::AddDeallocation(void (*Callback)(void*), void *Data) { 255 Deallocations.push_back(std::make_pair(Callback, Data)); 256} 257 258void 259ASTContext::setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source) { 260 ExternalSource.reset(Source.take()); 261} 262 263void ASTContext::PrintStats() const { 264 fprintf(stderr, "*** AST Context Stats:\n"); 265 fprintf(stderr, " %d types total.\n", (int)Types.size()); 266 267 unsigned counts[] = { 268#define TYPE(Name, Parent) 0, 269#define ABSTRACT_TYPE(Name, Parent) 270#include "clang/AST/TypeNodes.def" 271 0 // Extra 272 }; 273 274 for (unsigned i = 0, e = Types.size(); i != e; ++i) { 275 Type *T = Types[i]; 276 counts[(unsigned)T->getTypeClass()]++; 277 } 278 279 unsigned Idx = 0; 280 unsigned TotalBytes = 0; 281#define TYPE(Name, Parent) \ 282 if (counts[Idx]) \ 283 fprintf(stderr, " %d %s types\n", (int)counts[Idx], #Name); \ 284 TotalBytes += counts[Idx] * sizeof(Name##Type); \ 285 ++Idx; 286#define ABSTRACT_TYPE(Name, Parent) 287#include "clang/AST/TypeNodes.def" 288 289 fprintf(stderr, "Total bytes = %d\n", int(TotalBytes)); 290 291 // Implicit special member functions. 292 fprintf(stderr, " %u/%u implicit default constructors created\n", 293 NumImplicitDefaultConstructorsDeclared, 294 NumImplicitDefaultConstructors); 295 fprintf(stderr, " %u/%u implicit copy constructors created\n", 296 NumImplicitCopyConstructorsDeclared, 297 NumImplicitCopyConstructors); 298 fprintf(stderr, " %u/%u implicit copy assignment operators created\n", 299 NumImplicitCopyAssignmentOperatorsDeclared, 300 NumImplicitCopyAssignmentOperators); 301 fprintf(stderr, " %u/%u implicit destructors created\n", 302 NumImplicitDestructorsDeclared, NumImplicitDestructors); 303 304 if (ExternalSource.get()) { 305 fprintf(stderr, "\n"); 306 ExternalSource->PrintStats(); 307 } 308 309 BumpAlloc.PrintStats(); 310} 311 312 313void ASTContext::InitBuiltinType(CanQualType &R, BuiltinType::Kind K) { 314 BuiltinType *Ty = new (*this, TypeAlignment) BuiltinType(K); 315 R = CanQualType::CreateUnsafe(QualType(Ty, 0)); 316 Types.push_back(Ty); 317} 318 319void ASTContext::InitBuiltinTypes() { 320 assert(VoidTy.isNull() && "Context reinitialized?"); 321 322 // C99 6.2.5p19. 323 InitBuiltinType(VoidTy, BuiltinType::Void); 324 325 // C99 6.2.5p2. 326 InitBuiltinType(BoolTy, BuiltinType::Bool); 327 // C99 6.2.5p3. 328 if (LangOpts.CharIsSigned) 329 InitBuiltinType(CharTy, BuiltinType::Char_S); 330 else 331 InitBuiltinType(CharTy, BuiltinType::Char_U); 332 // C99 6.2.5p4. 333 InitBuiltinType(SignedCharTy, BuiltinType::SChar); 334 InitBuiltinType(ShortTy, BuiltinType::Short); 335 InitBuiltinType(IntTy, BuiltinType::Int); 336 InitBuiltinType(LongTy, BuiltinType::Long); 337 InitBuiltinType(LongLongTy, BuiltinType::LongLong); 338 339 // C99 6.2.5p6. 340 InitBuiltinType(UnsignedCharTy, BuiltinType::UChar); 341 InitBuiltinType(UnsignedShortTy, BuiltinType::UShort); 342 InitBuiltinType(UnsignedIntTy, BuiltinType::UInt); 343 InitBuiltinType(UnsignedLongTy, BuiltinType::ULong); 344 InitBuiltinType(UnsignedLongLongTy, BuiltinType::ULongLong); 345 346 // C99 6.2.5p10. 347 InitBuiltinType(FloatTy, BuiltinType::Float); 348 InitBuiltinType(DoubleTy, BuiltinType::Double); 349 InitBuiltinType(LongDoubleTy, BuiltinType::LongDouble); 350 351 // GNU extension, 128-bit integers. 352 InitBuiltinType(Int128Ty, BuiltinType::Int128); 353 InitBuiltinType(UnsignedInt128Ty, BuiltinType::UInt128); 354 355 if (LangOpts.CPlusPlus) { // C++ 3.9.1p5 356 if (!LangOpts.ShortWChar) 357 InitBuiltinType(WCharTy, BuiltinType::WChar_S); 358 else // -fshort-wchar makes wchar_t be unsigned. 359 InitBuiltinType(WCharTy, BuiltinType::WChar_U); 360 } else // C99 361 WCharTy = getFromTargetType(Target.getWCharType()); 362 363 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 364 InitBuiltinType(Char16Ty, BuiltinType::Char16); 365 else // C99 366 Char16Ty = getFromTargetType(Target.getChar16Type()); 367 368 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 369 InitBuiltinType(Char32Ty, BuiltinType::Char32); 370 else // C99 371 Char32Ty = getFromTargetType(Target.getChar32Type()); 372 373 // Placeholder type for type-dependent expressions whose type is 374 // completely unknown. No code should ever check a type against 375 // DependentTy and users should never see it; however, it is here to 376 // help diagnose failures to properly check for type-dependent 377 // expressions. 378 InitBuiltinType(DependentTy, BuiltinType::Dependent); 379 380 // Placeholder type for functions. 381 InitBuiltinType(OverloadTy, BuiltinType::Overload); 382 383 // Placeholder type for C++0x auto declarations whose real type has 384 // not yet been deduced. 385 InitBuiltinType(UndeducedAutoTy, BuiltinType::UndeducedAuto); 386 387 // C99 6.2.5p11. 388 FloatComplexTy = getComplexType(FloatTy); 389 DoubleComplexTy = getComplexType(DoubleTy); 390 LongDoubleComplexTy = getComplexType(LongDoubleTy); 391 392 BuiltinVaListType = QualType(); 393 394 // "Builtin" typedefs set by Sema::ActOnTranslationUnitScope(). 395 ObjCIdTypedefType = QualType(); 396 ObjCClassTypedefType = QualType(); 397 ObjCSelTypedefType = QualType(); 398 399 // Builtin types for 'id', 'Class', and 'SEL'. 400 InitBuiltinType(ObjCBuiltinIdTy, BuiltinType::ObjCId); 401 InitBuiltinType(ObjCBuiltinClassTy, BuiltinType::ObjCClass); 402 InitBuiltinType(ObjCBuiltinSelTy, BuiltinType::ObjCSel); 403 404 ObjCConstantStringType = QualType(); 405 406 // void * type 407 VoidPtrTy = getPointerType(VoidTy); 408 409 // nullptr type (C++0x 2.14.7) 410 InitBuiltinType(NullPtrTy, BuiltinType::NullPtr); 411} 412 413Diagnostic &ASTContext::getDiagnostics() const { 414 return SourceMgr.getDiagnostics(); 415} 416 417AttrVec& ASTContext::getDeclAttrs(const Decl *D) { 418 AttrVec *&Result = DeclAttrs[D]; 419 if (!Result) { 420 void *Mem = Allocate(sizeof(AttrVec)); 421 Result = new (Mem) AttrVec; 422 } 423 424 return *Result; 425} 426 427/// \brief Erase the attributes corresponding to the given declaration. 428void ASTContext::eraseDeclAttrs(const Decl *D) { 429 llvm::DenseMap<const Decl*, AttrVec*>::iterator Pos = DeclAttrs.find(D); 430 if (Pos != DeclAttrs.end()) { 431 Pos->second->~AttrVec(); 432 DeclAttrs.erase(Pos); 433 } 434} 435 436 437MemberSpecializationInfo * 438ASTContext::getInstantiatedFromStaticDataMember(const VarDecl *Var) { 439 assert(Var->isStaticDataMember() && "Not a static data member"); 440 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *>::iterator Pos 441 = InstantiatedFromStaticDataMember.find(Var); 442 if (Pos == InstantiatedFromStaticDataMember.end()) 443 return 0; 444 445 return Pos->second; 446} 447 448void 449ASTContext::setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 450 TemplateSpecializationKind TSK, 451 SourceLocation PointOfInstantiation) { 452 assert(Inst->isStaticDataMember() && "Not a static data member"); 453 assert(Tmpl->isStaticDataMember() && "Not a static data member"); 454 assert(!InstantiatedFromStaticDataMember[Inst] && 455 "Already noted what static data member was instantiated from"); 456 InstantiatedFromStaticDataMember[Inst] 457 = new (*this) MemberSpecializationInfo(Tmpl, TSK, PointOfInstantiation); 458} 459 460NamedDecl * 461ASTContext::getInstantiatedFromUsingDecl(UsingDecl *UUD) { 462 llvm::DenseMap<UsingDecl *, NamedDecl *>::const_iterator Pos 463 = InstantiatedFromUsingDecl.find(UUD); 464 if (Pos == InstantiatedFromUsingDecl.end()) 465 return 0; 466 467 return Pos->second; 468} 469 470void 471ASTContext::setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern) { 472 assert((isa<UsingDecl>(Pattern) || 473 isa<UnresolvedUsingValueDecl>(Pattern) || 474 isa<UnresolvedUsingTypenameDecl>(Pattern)) && 475 "pattern decl is not a using decl"); 476 assert(!InstantiatedFromUsingDecl[Inst] && "pattern already exists"); 477 InstantiatedFromUsingDecl[Inst] = Pattern; 478} 479 480UsingShadowDecl * 481ASTContext::getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst) { 482 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*>::const_iterator Pos 483 = InstantiatedFromUsingShadowDecl.find(Inst); 484 if (Pos == InstantiatedFromUsingShadowDecl.end()) 485 return 0; 486 487 return Pos->second; 488} 489 490void 491ASTContext::setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 492 UsingShadowDecl *Pattern) { 493 assert(!InstantiatedFromUsingShadowDecl[Inst] && "pattern already exists"); 494 InstantiatedFromUsingShadowDecl[Inst] = Pattern; 495} 496 497FieldDecl *ASTContext::getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field) { 498 llvm::DenseMap<FieldDecl *, FieldDecl *>::iterator Pos 499 = InstantiatedFromUnnamedFieldDecl.find(Field); 500 if (Pos == InstantiatedFromUnnamedFieldDecl.end()) 501 return 0; 502 503 return Pos->second; 504} 505 506void ASTContext::setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, 507 FieldDecl *Tmpl) { 508 assert(!Inst->getDeclName() && "Instantiated field decl is not unnamed"); 509 assert(!Tmpl->getDeclName() && "Template field decl is not unnamed"); 510 assert(!InstantiatedFromUnnamedFieldDecl[Inst] && 511 "Already noted what unnamed field was instantiated from"); 512 513 InstantiatedFromUnnamedFieldDecl[Inst] = Tmpl; 514} 515 516ASTContext::overridden_cxx_method_iterator 517ASTContext::overridden_methods_begin(const CXXMethodDecl *Method) const { 518 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 519 = OverriddenMethods.find(Method); 520 if (Pos == OverriddenMethods.end()) 521 return 0; 522 523 return Pos->second.begin(); 524} 525 526ASTContext::overridden_cxx_method_iterator 527ASTContext::overridden_methods_end(const CXXMethodDecl *Method) const { 528 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 529 = OverriddenMethods.find(Method); 530 if (Pos == OverriddenMethods.end()) 531 return 0; 532 533 return Pos->second.end(); 534} 535 536unsigned 537ASTContext::overridden_methods_size(const CXXMethodDecl *Method) const { 538 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 539 = OverriddenMethods.find(Method); 540 if (Pos == OverriddenMethods.end()) 541 return 0; 542 543 return Pos->second.size(); 544} 545 546void ASTContext::addOverriddenMethod(const CXXMethodDecl *Method, 547 const CXXMethodDecl *Overridden) { 548 OverriddenMethods[Method].push_back(Overridden); 549} 550 551//===----------------------------------------------------------------------===// 552// Type Sizing and Analysis 553//===----------------------------------------------------------------------===// 554 555/// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 556/// scalar floating point type. 557const llvm::fltSemantics &ASTContext::getFloatTypeSemantics(QualType T) const { 558 const BuiltinType *BT = T->getAs<BuiltinType>(); 559 assert(BT && "Not a floating point type!"); 560 switch (BT->getKind()) { 561 default: assert(0 && "Not a floating point type!"); 562 case BuiltinType::Float: return Target.getFloatFormat(); 563 case BuiltinType::Double: return Target.getDoubleFormat(); 564 case BuiltinType::LongDouble: return Target.getLongDoubleFormat(); 565 } 566} 567 568/// getDeclAlign - Return a conservative estimate of the alignment of the 569/// specified decl. Note that bitfields do not have a valid alignment, so 570/// this method will assert on them. 571/// If @p RefAsPointee, references are treated like their underlying type 572/// (for alignof), else they're treated like pointers (for CodeGen). 573CharUnits ASTContext::getDeclAlign(const Decl *D, bool RefAsPointee) const { 574 unsigned Align = Target.getCharWidth(); 575 576 bool UseAlignAttrOnly = false; 577 if (unsigned AlignFromAttr = D->getMaxAlignment()) { 578 Align = AlignFromAttr; 579 580 // __attribute__((aligned)) can increase or decrease alignment 581 // *except* on a struct or struct member, where it only increases 582 // alignment unless 'packed' is also specified. 583 // 584 // It is an error for [[align]] to decrease alignment, so we can 585 // ignore that possibility; Sema should diagnose it. 586 if (isa<FieldDecl>(D)) { 587 UseAlignAttrOnly = D->hasAttr<PackedAttr>() || 588 cast<FieldDecl>(D)->getParent()->hasAttr<PackedAttr>(); 589 } else { 590 UseAlignAttrOnly = true; 591 } 592 } 593 594 // If we're using the align attribute only, just ignore everything 595 // else about the declaration and its type. 596 if (UseAlignAttrOnly) { 597 // do nothing 598 599 } else if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) { 600 QualType T = VD->getType(); 601 if (const ReferenceType* RT = T->getAs<ReferenceType>()) { 602 if (RefAsPointee) 603 T = RT->getPointeeType(); 604 else 605 T = getPointerType(RT->getPointeeType()); 606 } 607 if (!T->isIncompleteType() && !T->isFunctionType()) { 608 // Adjust alignments of declarations with array type by the 609 // large-array alignment on the target. 610 unsigned MinWidth = Target.getLargeArrayMinWidth(); 611 const ArrayType *arrayType; 612 if (MinWidth && (arrayType = getAsArrayType(T))) { 613 if (isa<VariableArrayType>(arrayType)) 614 Align = std::max(Align, Target.getLargeArrayAlign()); 615 else if (isa<ConstantArrayType>(arrayType) && 616 MinWidth <= getTypeSize(cast<ConstantArrayType>(arrayType))) 617 Align = std::max(Align, Target.getLargeArrayAlign()); 618 619 // Walk through any array types while we're at it. 620 T = getBaseElementType(arrayType); 621 } 622 Align = std::max(Align, getPreferredTypeAlign(T.getTypePtr())); 623 } 624 625 // Fields can be subject to extra alignment constraints, like if 626 // the field is packed, the struct is packed, or the struct has a 627 // a max-field-alignment constraint (#pragma pack). So calculate 628 // the actual alignment of the field within the struct, and then 629 // (as we're expected to) constrain that by the alignment of the type. 630 if (const FieldDecl *field = dyn_cast<FieldDecl>(VD)) { 631 // So calculate the alignment of the field. 632 const ASTRecordLayout &layout = getASTRecordLayout(field->getParent()); 633 634 // Start with the record's overall alignment. 635 unsigned fieldAlign = toBits(layout.getAlignment()); 636 637 // Use the GCD of that and the offset within the record. 638 uint64_t offset = layout.getFieldOffset(field->getFieldIndex()); 639 if (offset > 0) { 640 // Alignment is always a power of 2, so the GCD will be a power of 2, 641 // which means we get to do this crazy thing instead of Euclid's. 642 uint64_t lowBitOfOffset = offset & (~offset + 1); 643 if (lowBitOfOffset < fieldAlign) 644 fieldAlign = static_cast<unsigned>(lowBitOfOffset); 645 } 646 647 Align = std::min(Align, fieldAlign); 648 } 649 } 650 651 return toCharUnitsFromBits(Align); 652} 653 654std::pair<CharUnits, CharUnits> 655ASTContext::getTypeInfoInChars(const Type *T) { 656 std::pair<uint64_t, unsigned> Info = getTypeInfo(T); 657 return std::make_pair(toCharUnitsFromBits(Info.first), 658 toCharUnitsFromBits(Info.second)); 659} 660 661std::pair<CharUnits, CharUnits> 662ASTContext::getTypeInfoInChars(QualType T) { 663 return getTypeInfoInChars(T.getTypePtr()); 664} 665 666/// getTypeSize - Return the size of the specified type, in bits. This method 667/// does not work on incomplete types. 668/// 669/// FIXME: Pointers into different addr spaces could have different sizes and 670/// alignment requirements: getPointerInfo should take an AddrSpace, this 671/// should take a QualType, &c. 672std::pair<uint64_t, unsigned> 673ASTContext::getTypeInfo(const Type *T) const { 674 uint64_t Width=0; 675 unsigned Align=8; 676 switch (T->getTypeClass()) { 677#define TYPE(Class, Base) 678#define ABSTRACT_TYPE(Class, Base) 679#define NON_CANONICAL_TYPE(Class, Base) 680#define DEPENDENT_TYPE(Class, Base) case Type::Class: 681#include "clang/AST/TypeNodes.def" 682 assert(false && "Should not see dependent types"); 683 break; 684 685 case Type::FunctionNoProto: 686 case Type::FunctionProto: 687 // GCC extension: alignof(function) = 32 bits 688 Width = 0; 689 Align = 32; 690 break; 691 692 case Type::IncompleteArray: 693 case Type::VariableArray: 694 Width = 0; 695 Align = getTypeAlign(cast<ArrayType>(T)->getElementType()); 696 break; 697 698 case Type::ConstantArray: { 699 const ConstantArrayType *CAT = cast<ConstantArrayType>(T); 700 701 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(CAT->getElementType()); 702 Width = EltInfo.first*CAT->getSize().getZExtValue(); 703 Align = EltInfo.second; 704 break; 705 } 706 case Type::ExtVector: 707 case Type::Vector: { 708 const VectorType *VT = cast<VectorType>(T); 709 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(VT->getElementType()); 710 Width = EltInfo.first*VT->getNumElements(); 711 Align = Width; 712 // If the alignment is not a power of 2, round up to the next power of 2. 713 // This happens for non-power-of-2 length vectors. 714 if (Align & (Align-1)) { 715 Align = llvm::NextPowerOf2(Align); 716 Width = llvm::RoundUpToAlignment(Width, Align); 717 } 718 break; 719 } 720 721 case Type::Builtin: 722 switch (cast<BuiltinType>(T)->getKind()) { 723 default: assert(0 && "Unknown builtin type!"); 724 case BuiltinType::Void: 725 // GCC extension: alignof(void) = 8 bits. 726 Width = 0; 727 Align = 8; 728 break; 729 730 case BuiltinType::Bool: 731 Width = Target.getBoolWidth(); 732 Align = Target.getBoolAlign(); 733 break; 734 case BuiltinType::Char_S: 735 case BuiltinType::Char_U: 736 case BuiltinType::UChar: 737 case BuiltinType::SChar: 738 Width = Target.getCharWidth(); 739 Align = Target.getCharAlign(); 740 break; 741 case BuiltinType::WChar_S: 742 case BuiltinType::WChar_U: 743 Width = Target.getWCharWidth(); 744 Align = Target.getWCharAlign(); 745 break; 746 case BuiltinType::Char16: 747 Width = Target.getChar16Width(); 748 Align = Target.getChar16Align(); 749 break; 750 case BuiltinType::Char32: 751 Width = Target.getChar32Width(); 752 Align = Target.getChar32Align(); 753 break; 754 case BuiltinType::UShort: 755 case BuiltinType::Short: 756 Width = Target.getShortWidth(); 757 Align = Target.getShortAlign(); 758 break; 759 case BuiltinType::UInt: 760 case BuiltinType::Int: 761 Width = Target.getIntWidth(); 762 Align = Target.getIntAlign(); 763 break; 764 case BuiltinType::ULong: 765 case BuiltinType::Long: 766 Width = Target.getLongWidth(); 767 Align = Target.getLongAlign(); 768 break; 769 case BuiltinType::ULongLong: 770 case BuiltinType::LongLong: 771 Width = Target.getLongLongWidth(); 772 Align = Target.getLongLongAlign(); 773 break; 774 case BuiltinType::Int128: 775 case BuiltinType::UInt128: 776 Width = 128; 777 Align = 128; // int128_t is 128-bit aligned on all targets. 778 break; 779 case BuiltinType::Float: 780 Width = Target.getFloatWidth(); 781 Align = Target.getFloatAlign(); 782 break; 783 case BuiltinType::Double: 784 Width = Target.getDoubleWidth(); 785 Align = Target.getDoubleAlign(); 786 break; 787 case BuiltinType::LongDouble: 788 Width = Target.getLongDoubleWidth(); 789 Align = Target.getLongDoubleAlign(); 790 break; 791 case BuiltinType::NullPtr: 792 Width = Target.getPointerWidth(0); // C++ 3.9.1p11: sizeof(nullptr_t) 793 Align = Target.getPointerAlign(0); // == sizeof(void*) 794 break; 795 case BuiltinType::ObjCId: 796 case BuiltinType::ObjCClass: 797 case BuiltinType::ObjCSel: 798 Width = Target.getPointerWidth(0); 799 Align = Target.getPointerAlign(0); 800 break; 801 } 802 break; 803 case Type::ObjCObjectPointer: 804 Width = Target.getPointerWidth(0); 805 Align = Target.getPointerAlign(0); 806 break; 807 case Type::BlockPointer: { 808 unsigned AS = cast<BlockPointerType>(T)->getPointeeType().getAddressSpace(); 809 Width = Target.getPointerWidth(AS); 810 Align = Target.getPointerAlign(AS); 811 break; 812 } 813 case Type::LValueReference: 814 case Type::RValueReference: { 815 // alignof and sizeof should never enter this code path here, so we go 816 // the pointer route. 817 unsigned AS = cast<ReferenceType>(T)->getPointeeType().getAddressSpace(); 818 Width = Target.getPointerWidth(AS); 819 Align = Target.getPointerAlign(AS); 820 break; 821 } 822 case Type::Pointer: { 823 unsigned AS = cast<PointerType>(T)->getPointeeType().getAddressSpace(); 824 Width = Target.getPointerWidth(AS); 825 Align = Target.getPointerAlign(AS); 826 break; 827 } 828 case Type::MemberPointer: { 829 const MemberPointerType *MPT = cast<MemberPointerType>(T); 830 std::pair<uint64_t, unsigned> PtrDiffInfo = 831 getTypeInfo(getPointerDiffType()); 832 Width = PtrDiffInfo.first * ABI->getMemberPointerSize(MPT); 833 Align = PtrDiffInfo.second; 834 break; 835 } 836 case Type::Complex: { 837 // Complex types have the same alignment as their elements, but twice the 838 // size. 839 std::pair<uint64_t, unsigned> EltInfo = 840 getTypeInfo(cast<ComplexType>(T)->getElementType()); 841 Width = EltInfo.first*2; 842 Align = EltInfo.second; 843 break; 844 } 845 case Type::ObjCObject: 846 return getTypeInfo(cast<ObjCObjectType>(T)->getBaseType().getTypePtr()); 847 case Type::ObjCInterface: { 848 const ObjCInterfaceType *ObjCI = cast<ObjCInterfaceType>(T); 849 const ASTRecordLayout &Layout = getASTObjCInterfaceLayout(ObjCI->getDecl()); 850 Width = toBits(Layout.getSize()); 851 Align = toBits(Layout.getAlignment()); 852 break; 853 } 854 case Type::Record: 855 case Type::Enum: { 856 const TagType *TT = cast<TagType>(T); 857 858 if (TT->getDecl()->isInvalidDecl()) { 859 Width = 1; 860 Align = 1; 861 break; 862 } 863 864 if (const EnumType *ET = dyn_cast<EnumType>(TT)) 865 return getTypeInfo(ET->getDecl()->getIntegerType()); 866 867 const RecordType *RT = cast<RecordType>(TT); 868 const ASTRecordLayout &Layout = getASTRecordLayout(RT->getDecl()); 869 Width = toBits(Layout.getSize()); 870 Align = toBits(Layout.getAlignment()); 871 break; 872 } 873 874 case Type::SubstTemplateTypeParm: 875 return getTypeInfo(cast<SubstTemplateTypeParmType>(T)-> 876 getReplacementType().getTypePtr()); 877 878 case Type::Paren: 879 return getTypeInfo(cast<ParenType>(T)->getInnerType().getTypePtr()); 880 881 case Type::Typedef: { 882 const TypedefDecl *Typedef = cast<TypedefType>(T)->getDecl(); 883 std::pair<uint64_t, unsigned> Info 884 = getTypeInfo(Typedef->getUnderlyingType().getTypePtr()); 885 Align = std::max(Typedef->getMaxAlignment(), Info.second); 886 Width = Info.first; 887 break; 888 } 889 890 case Type::TypeOfExpr: 891 return getTypeInfo(cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType() 892 .getTypePtr()); 893 894 case Type::TypeOf: 895 return getTypeInfo(cast<TypeOfType>(T)->getUnderlyingType().getTypePtr()); 896 897 case Type::Decltype: 898 return getTypeInfo(cast<DecltypeType>(T)->getUnderlyingExpr()->getType() 899 .getTypePtr()); 900 901 case Type::Elaborated: 902 return getTypeInfo(cast<ElaboratedType>(T)->getNamedType().getTypePtr()); 903 904 case Type::Attributed: 905 return getTypeInfo( 906 cast<AttributedType>(T)->getEquivalentType().getTypePtr()); 907 908 case Type::TemplateSpecialization: 909 assert(getCanonicalType(T) != T && 910 "Cannot request the size of a dependent type"); 911 // FIXME: this is likely to be wrong once we support template 912 // aliases, since a template alias could refer to a typedef that 913 // has an __aligned__ attribute on it. 914 return getTypeInfo(getCanonicalType(T)); 915 } 916 917 assert(Align && (Align & (Align-1)) == 0 && "Alignment must be power of 2"); 918 return std::make_pair(Width, Align); 919} 920 921/// toCharUnitsFromBits - Convert a size in bits to a size in characters. 922CharUnits ASTContext::toCharUnitsFromBits(int64_t BitSize) const { 923 return CharUnits::fromQuantity(BitSize / getCharWidth()); 924} 925 926/// toBits - Convert a size in characters to a size in characters. 927int64_t ASTContext::toBits(CharUnits CharSize) const { 928 return CharSize.getQuantity() * getCharWidth(); 929} 930 931/// getTypeSizeInChars - Return the size of the specified type, in characters. 932/// This method does not work on incomplete types. 933CharUnits ASTContext::getTypeSizeInChars(QualType T) const { 934 return toCharUnitsFromBits(getTypeSize(T)); 935} 936CharUnits ASTContext::getTypeSizeInChars(const Type *T) const { 937 return toCharUnitsFromBits(getTypeSize(T)); 938} 939 940/// getTypeAlignInChars - Return the ABI-specified alignment of a type, in 941/// characters. This method does not work on incomplete types. 942CharUnits ASTContext::getTypeAlignInChars(QualType T) const { 943 return toCharUnitsFromBits(getTypeAlign(T)); 944} 945CharUnits ASTContext::getTypeAlignInChars(const Type *T) const { 946 return toCharUnitsFromBits(getTypeAlign(T)); 947} 948 949/// getPreferredTypeAlign - Return the "preferred" alignment of the specified 950/// type for the current target in bits. This can be different than the ABI 951/// alignment in cases where it is beneficial for performance to overalign 952/// a data type. 953unsigned ASTContext::getPreferredTypeAlign(const Type *T) const { 954 unsigned ABIAlign = getTypeAlign(T); 955 956 // Double and long long should be naturally aligned if possible. 957 if (const ComplexType* CT = T->getAs<ComplexType>()) 958 T = CT->getElementType().getTypePtr(); 959 if (T->isSpecificBuiltinType(BuiltinType::Double) || 960 T->isSpecificBuiltinType(BuiltinType::LongLong)) 961 return std::max(ABIAlign, (unsigned)getTypeSize(T)); 962 963 return ABIAlign; 964} 965 966/// ShallowCollectObjCIvars - 967/// Collect all ivars, including those synthesized, in the current class. 968/// 969void ASTContext::ShallowCollectObjCIvars(const ObjCInterfaceDecl *OI, 970 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) const { 971 // FIXME. This need be removed but there are two many places which 972 // assume const-ness of ObjCInterfaceDecl 973 ObjCInterfaceDecl *IDecl = const_cast<ObjCInterfaceDecl *>(OI); 974 for (ObjCIvarDecl *Iv = IDecl->all_declared_ivar_begin(); Iv; 975 Iv= Iv->getNextIvar()) 976 Ivars.push_back(Iv); 977} 978 979/// DeepCollectObjCIvars - 980/// This routine first collects all declared, but not synthesized, ivars in 981/// super class and then collects all ivars, including those synthesized for 982/// current class. This routine is used for implementation of current class 983/// when all ivars, declared and synthesized are known. 984/// 985void ASTContext::DeepCollectObjCIvars(const ObjCInterfaceDecl *OI, 986 bool leafClass, 987 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) const { 988 if (const ObjCInterfaceDecl *SuperClass = OI->getSuperClass()) 989 DeepCollectObjCIvars(SuperClass, false, Ivars); 990 if (!leafClass) { 991 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 992 E = OI->ivar_end(); I != E; ++I) 993 Ivars.push_back(*I); 994 } 995 else 996 ShallowCollectObjCIvars(OI, Ivars); 997} 998 999/// CollectInheritedProtocols - Collect all protocols in current class and 1000/// those inherited by it. 1001void ASTContext::CollectInheritedProtocols(const Decl *CDecl, 1002 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols) { 1003 if (const ObjCInterfaceDecl *OI = dyn_cast<ObjCInterfaceDecl>(CDecl)) { 1004 // We can use protocol_iterator here instead of 1005 // all_referenced_protocol_iterator since we are walking all categories. 1006 for (ObjCInterfaceDecl::all_protocol_iterator P = OI->all_referenced_protocol_begin(), 1007 PE = OI->all_referenced_protocol_end(); P != PE; ++P) { 1008 ObjCProtocolDecl *Proto = (*P); 1009 Protocols.insert(Proto); 1010 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1011 PE = Proto->protocol_end(); P != PE; ++P) { 1012 Protocols.insert(*P); 1013 CollectInheritedProtocols(*P, Protocols); 1014 } 1015 } 1016 1017 // Categories of this Interface. 1018 for (const ObjCCategoryDecl *CDeclChain = OI->getCategoryList(); 1019 CDeclChain; CDeclChain = CDeclChain->getNextClassCategory()) 1020 CollectInheritedProtocols(CDeclChain, Protocols); 1021 if (ObjCInterfaceDecl *SD = OI->getSuperClass()) 1022 while (SD) { 1023 CollectInheritedProtocols(SD, Protocols); 1024 SD = SD->getSuperClass(); 1025 } 1026 } else if (const ObjCCategoryDecl *OC = dyn_cast<ObjCCategoryDecl>(CDecl)) { 1027 for (ObjCCategoryDecl::protocol_iterator P = OC->protocol_begin(), 1028 PE = OC->protocol_end(); P != PE; ++P) { 1029 ObjCProtocolDecl *Proto = (*P); 1030 Protocols.insert(Proto); 1031 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1032 PE = Proto->protocol_end(); P != PE; ++P) 1033 CollectInheritedProtocols(*P, Protocols); 1034 } 1035 } else if (const ObjCProtocolDecl *OP = dyn_cast<ObjCProtocolDecl>(CDecl)) { 1036 for (ObjCProtocolDecl::protocol_iterator P = OP->protocol_begin(), 1037 PE = OP->protocol_end(); P != PE; ++P) { 1038 ObjCProtocolDecl *Proto = (*P); 1039 Protocols.insert(Proto); 1040 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1041 PE = Proto->protocol_end(); P != PE; ++P) 1042 CollectInheritedProtocols(*P, Protocols); 1043 } 1044 } 1045} 1046 1047unsigned ASTContext::CountNonClassIvars(const ObjCInterfaceDecl *OI) const { 1048 unsigned count = 0; 1049 // Count ivars declared in class extension. 1050 for (const ObjCCategoryDecl *CDecl = OI->getFirstClassExtension(); CDecl; 1051 CDecl = CDecl->getNextClassExtension()) 1052 count += CDecl->ivar_size(); 1053 1054 // Count ivar defined in this class's implementation. This 1055 // includes synthesized ivars. 1056 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) 1057 count += ImplDecl->ivar_size(); 1058 1059 return count; 1060} 1061 1062/// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 1063ObjCImplementationDecl *ASTContext::getObjCImplementation(ObjCInterfaceDecl *D) { 1064 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 1065 I = ObjCImpls.find(D); 1066 if (I != ObjCImpls.end()) 1067 return cast<ObjCImplementationDecl>(I->second); 1068 return 0; 1069} 1070/// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 1071ObjCCategoryImplDecl *ASTContext::getObjCImplementation(ObjCCategoryDecl *D) { 1072 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 1073 I = ObjCImpls.find(D); 1074 if (I != ObjCImpls.end()) 1075 return cast<ObjCCategoryImplDecl>(I->second); 1076 return 0; 1077} 1078 1079/// \brief Set the implementation of ObjCInterfaceDecl. 1080void ASTContext::setObjCImplementation(ObjCInterfaceDecl *IFaceD, 1081 ObjCImplementationDecl *ImplD) { 1082 assert(IFaceD && ImplD && "Passed null params"); 1083 ObjCImpls[IFaceD] = ImplD; 1084} 1085/// \brief Set the implementation of ObjCCategoryDecl. 1086void ASTContext::setObjCImplementation(ObjCCategoryDecl *CatD, 1087 ObjCCategoryImplDecl *ImplD) { 1088 assert(CatD && ImplD && "Passed null params"); 1089 ObjCImpls[CatD] = ImplD; 1090} 1091 1092/// \brief Get the copy initialization expression of VarDecl,or NULL if 1093/// none exists. 1094Expr *ASTContext::getBlockVarCopyInits(const VarDecl*VD) { 1095 assert(VD && "Passed null params"); 1096 assert(VD->hasAttr<BlocksAttr>() && 1097 "getBlockVarCopyInits - not __block var"); 1098 llvm::DenseMap<const VarDecl*, Expr*>::iterator 1099 I = BlockVarCopyInits.find(VD); 1100 return (I != BlockVarCopyInits.end()) ? cast<Expr>(I->second) : 0; 1101} 1102 1103/// \brief Set the copy inialization expression of a block var decl. 1104void ASTContext::setBlockVarCopyInits(VarDecl*VD, Expr* Init) { 1105 assert(VD && Init && "Passed null params"); 1106 assert(VD->hasAttr<BlocksAttr>() && 1107 "setBlockVarCopyInits - not __block var"); 1108 BlockVarCopyInits[VD] = Init; 1109} 1110 1111/// \brief Allocate an uninitialized TypeSourceInfo. 1112/// 1113/// The caller should initialize the memory held by TypeSourceInfo using 1114/// the TypeLoc wrappers. 1115/// 1116/// \param T the type that will be the basis for type source info. This type 1117/// should refer to how the declarator was written in source code, not to 1118/// what type semantic analysis resolved the declarator to. 1119TypeSourceInfo *ASTContext::CreateTypeSourceInfo(QualType T, 1120 unsigned DataSize) const { 1121 if (!DataSize) 1122 DataSize = TypeLoc::getFullDataSizeForType(T); 1123 else 1124 assert(DataSize == TypeLoc::getFullDataSizeForType(T) && 1125 "incorrect data size provided to CreateTypeSourceInfo!"); 1126 1127 TypeSourceInfo *TInfo = 1128 (TypeSourceInfo*)BumpAlloc.Allocate(sizeof(TypeSourceInfo) + DataSize, 8); 1129 new (TInfo) TypeSourceInfo(T); 1130 return TInfo; 1131} 1132 1133TypeSourceInfo *ASTContext::getTrivialTypeSourceInfo(QualType T, 1134 SourceLocation L) const { 1135 TypeSourceInfo *DI = CreateTypeSourceInfo(T); 1136 DI->getTypeLoc().initialize(const_cast<ASTContext &>(*this), L); 1137 return DI; 1138} 1139 1140const ASTRecordLayout & 1141ASTContext::getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) const { 1142 return getObjCLayout(D, 0); 1143} 1144 1145const ASTRecordLayout & 1146ASTContext::getASTObjCImplementationLayout( 1147 const ObjCImplementationDecl *D) const { 1148 return getObjCLayout(D->getClassInterface(), D); 1149} 1150 1151//===----------------------------------------------------------------------===// 1152// Type creation/memoization methods 1153//===----------------------------------------------------------------------===// 1154 1155QualType 1156ASTContext::getExtQualType(const Type *baseType, Qualifiers quals) const { 1157 unsigned fastQuals = quals.getFastQualifiers(); 1158 quals.removeFastQualifiers(); 1159 1160 // Check if we've already instantiated this type. 1161 llvm::FoldingSetNodeID ID; 1162 ExtQuals::Profile(ID, baseType, quals); 1163 void *insertPos = 0; 1164 if (ExtQuals *eq = ExtQualNodes.FindNodeOrInsertPos(ID, insertPos)) { 1165 assert(eq->getQualifiers() == quals); 1166 return QualType(eq, fastQuals); 1167 } 1168 1169 // If the base type is not canonical, make the appropriate canonical type. 1170 QualType canon; 1171 if (!baseType->isCanonicalUnqualified()) { 1172 SplitQualType canonSplit = baseType->getCanonicalTypeInternal().split(); 1173 canonSplit.second.addConsistentQualifiers(quals); 1174 canon = getExtQualType(canonSplit.first, canonSplit.second); 1175 1176 // Re-find the insert position. 1177 (void) ExtQualNodes.FindNodeOrInsertPos(ID, insertPos); 1178 } 1179 1180 ExtQuals *eq = new (*this, TypeAlignment) ExtQuals(baseType, canon, quals); 1181 ExtQualNodes.InsertNode(eq, insertPos); 1182 return QualType(eq, fastQuals); 1183} 1184 1185QualType 1186ASTContext::getAddrSpaceQualType(QualType T, unsigned AddressSpace) const { 1187 QualType CanT = getCanonicalType(T); 1188 if (CanT.getAddressSpace() == AddressSpace) 1189 return T; 1190 1191 // If we are composing extended qualifiers together, merge together 1192 // into one ExtQuals node. 1193 QualifierCollector Quals; 1194 const Type *TypeNode = Quals.strip(T); 1195 1196 // If this type already has an address space specified, it cannot get 1197 // another one. 1198 assert(!Quals.hasAddressSpace() && 1199 "Type cannot be in multiple addr spaces!"); 1200 Quals.addAddressSpace(AddressSpace); 1201 1202 return getExtQualType(TypeNode, Quals); 1203} 1204 1205QualType ASTContext::getObjCGCQualType(QualType T, 1206 Qualifiers::GC GCAttr) const { 1207 QualType CanT = getCanonicalType(T); 1208 if (CanT.getObjCGCAttr() == GCAttr) 1209 return T; 1210 1211 if (const PointerType *ptr = T->getAs<PointerType>()) { 1212 QualType Pointee = ptr->getPointeeType(); 1213 if (Pointee->isAnyPointerType()) { 1214 QualType ResultType = getObjCGCQualType(Pointee, GCAttr); 1215 return getPointerType(ResultType); 1216 } 1217 } 1218 1219 // If we are composing extended qualifiers together, merge together 1220 // into one ExtQuals node. 1221 QualifierCollector Quals; 1222 const Type *TypeNode = Quals.strip(T); 1223 1224 // If this type already has an ObjCGC specified, it cannot get 1225 // another one. 1226 assert(!Quals.hasObjCGCAttr() && 1227 "Type cannot have multiple ObjCGCs!"); 1228 Quals.addObjCGCAttr(GCAttr); 1229 1230 return getExtQualType(TypeNode, Quals); 1231} 1232 1233const FunctionType *ASTContext::adjustFunctionType(const FunctionType *T, 1234 FunctionType::ExtInfo Info) { 1235 if (T->getExtInfo() == Info) 1236 return T; 1237 1238 QualType Result; 1239 if (const FunctionNoProtoType *FNPT = dyn_cast<FunctionNoProtoType>(T)) { 1240 Result = getFunctionNoProtoType(FNPT->getResultType(), Info); 1241 } else { 1242 const FunctionProtoType *FPT = cast<FunctionProtoType>(T); 1243 FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); 1244 EPI.ExtInfo = Info; 1245 Result = getFunctionType(FPT->getResultType(), FPT->arg_type_begin(), 1246 FPT->getNumArgs(), EPI); 1247 } 1248 1249 return cast<FunctionType>(Result.getTypePtr()); 1250} 1251 1252/// getComplexType - Return the uniqued reference to the type for a complex 1253/// number with the specified element type. 1254QualType ASTContext::getComplexType(QualType T) const { 1255 // Unique pointers, to guarantee there is only one pointer of a particular 1256 // structure. 1257 llvm::FoldingSetNodeID ID; 1258 ComplexType::Profile(ID, T); 1259 1260 void *InsertPos = 0; 1261 if (ComplexType *CT = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos)) 1262 return QualType(CT, 0); 1263 1264 // If the pointee type isn't canonical, this won't be a canonical type either, 1265 // so fill in the canonical type field. 1266 QualType Canonical; 1267 if (!T.isCanonical()) { 1268 Canonical = getComplexType(getCanonicalType(T)); 1269 1270 // Get the new insert position for the node we care about. 1271 ComplexType *NewIP = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos); 1272 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1273 } 1274 ComplexType *New = new (*this, TypeAlignment) ComplexType(T, Canonical); 1275 Types.push_back(New); 1276 ComplexTypes.InsertNode(New, InsertPos); 1277 return QualType(New, 0); 1278} 1279 1280/// getPointerType - Return the uniqued reference to the type for a pointer to 1281/// the specified type. 1282QualType ASTContext::getPointerType(QualType T) const { 1283 // Unique pointers, to guarantee there is only one pointer of a particular 1284 // structure. 1285 llvm::FoldingSetNodeID ID; 1286 PointerType::Profile(ID, T); 1287 1288 void *InsertPos = 0; 1289 if (PointerType *PT = PointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1290 return QualType(PT, 0); 1291 1292 // If the pointee type isn't canonical, this won't be a canonical type either, 1293 // so fill in the canonical type field. 1294 QualType Canonical; 1295 if (!T.isCanonical()) { 1296 Canonical = getPointerType(getCanonicalType(T)); 1297 1298 // Get the new insert position for the node we care about. 1299 PointerType *NewIP = PointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1300 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1301 } 1302 PointerType *New = new (*this, TypeAlignment) PointerType(T, Canonical); 1303 Types.push_back(New); 1304 PointerTypes.InsertNode(New, InsertPos); 1305 return QualType(New, 0); 1306} 1307 1308/// getBlockPointerType - Return the uniqued reference to the type for 1309/// a pointer to the specified block. 1310QualType ASTContext::getBlockPointerType(QualType T) const { 1311 assert(T->isFunctionType() && "block of function types only"); 1312 // Unique pointers, to guarantee there is only one block of a particular 1313 // structure. 1314 llvm::FoldingSetNodeID ID; 1315 BlockPointerType::Profile(ID, T); 1316 1317 void *InsertPos = 0; 1318 if (BlockPointerType *PT = 1319 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1320 return QualType(PT, 0); 1321 1322 // If the block pointee type isn't canonical, this won't be a canonical 1323 // type either so fill in the canonical type field. 1324 QualType Canonical; 1325 if (!T.isCanonical()) { 1326 Canonical = getBlockPointerType(getCanonicalType(T)); 1327 1328 // Get the new insert position for the node we care about. 1329 BlockPointerType *NewIP = 1330 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1331 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1332 } 1333 BlockPointerType *New 1334 = new (*this, TypeAlignment) BlockPointerType(T, Canonical); 1335 Types.push_back(New); 1336 BlockPointerTypes.InsertNode(New, InsertPos); 1337 return QualType(New, 0); 1338} 1339 1340/// getLValueReferenceType - Return the uniqued reference to the type for an 1341/// lvalue reference to the specified type. 1342QualType 1343ASTContext::getLValueReferenceType(QualType T, bool SpelledAsLValue) const { 1344 // Unique pointers, to guarantee there is only one pointer of a particular 1345 // structure. 1346 llvm::FoldingSetNodeID ID; 1347 ReferenceType::Profile(ID, T, SpelledAsLValue); 1348 1349 void *InsertPos = 0; 1350 if (LValueReferenceType *RT = 1351 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1352 return QualType(RT, 0); 1353 1354 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1355 1356 // If the referencee type isn't canonical, this won't be a canonical type 1357 // either, so fill in the canonical type field. 1358 QualType Canonical; 1359 if (!SpelledAsLValue || InnerRef || !T.isCanonical()) { 1360 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1361 Canonical = getLValueReferenceType(getCanonicalType(PointeeType)); 1362 1363 // Get the new insert position for the node we care about. 1364 LValueReferenceType *NewIP = 1365 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1366 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1367 } 1368 1369 LValueReferenceType *New 1370 = new (*this, TypeAlignment) LValueReferenceType(T, Canonical, 1371 SpelledAsLValue); 1372 Types.push_back(New); 1373 LValueReferenceTypes.InsertNode(New, InsertPos); 1374 1375 return QualType(New, 0); 1376} 1377 1378/// getRValueReferenceType - Return the uniqued reference to the type for an 1379/// rvalue reference to the specified type. 1380QualType ASTContext::getRValueReferenceType(QualType T) const { 1381 // Unique pointers, to guarantee there is only one pointer of a particular 1382 // structure. 1383 llvm::FoldingSetNodeID ID; 1384 ReferenceType::Profile(ID, T, false); 1385 1386 void *InsertPos = 0; 1387 if (RValueReferenceType *RT = 1388 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1389 return QualType(RT, 0); 1390 1391 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1392 1393 // If the referencee type isn't canonical, this won't be a canonical type 1394 // either, so fill in the canonical type field. 1395 QualType Canonical; 1396 if (InnerRef || !T.isCanonical()) { 1397 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1398 Canonical = getRValueReferenceType(getCanonicalType(PointeeType)); 1399 1400 // Get the new insert position for the node we care about. 1401 RValueReferenceType *NewIP = 1402 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1403 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1404 } 1405 1406 RValueReferenceType *New 1407 = new (*this, TypeAlignment) RValueReferenceType(T, Canonical); 1408 Types.push_back(New); 1409 RValueReferenceTypes.InsertNode(New, InsertPos); 1410 return QualType(New, 0); 1411} 1412 1413/// getMemberPointerType - Return the uniqued reference to the type for a 1414/// member pointer to the specified type, in the specified class. 1415QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls) const { 1416 // Unique pointers, to guarantee there is only one pointer of a particular 1417 // structure. 1418 llvm::FoldingSetNodeID ID; 1419 MemberPointerType::Profile(ID, T, Cls); 1420 1421 void *InsertPos = 0; 1422 if (MemberPointerType *PT = 1423 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1424 return QualType(PT, 0); 1425 1426 // If the pointee or class type isn't canonical, this won't be a canonical 1427 // type either, so fill in the canonical type field. 1428 QualType Canonical; 1429 if (!T.isCanonical() || !Cls->isCanonicalUnqualified()) { 1430 Canonical = getMemberPointerType(getCanonicalType(T),getCanonicalType(Cls)); 1431 1432 // Get the new insert position for the node we care about. 1433 MemberPointerType *NewIP = 1434 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1435 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1436 } 1437 MemberPointerType *New 1438 = new (*this, TypeAlignment) MemberPointerType(T, Cls, Canonical); 1439 Types.push_back(New); 1440 MemberPointerTypes.InsertNode(New, InsertPos); 1441 return QualType(New, 0); 1442} 1443 1444/// getConstantArrayType - Return the unique reference to the type for an 1445/// array of the specified element type. 1446QualType ASTContext::getConstantArrayType(QualType EltTy, 1447 const llvm::APInt &ArySizeIn, 1448 ArrayType::ArraySizeModifier ASM, 1449 unsigned IndexTypeQuals) const { 1450 assert((EltTy->isDependentType() || 1451 EltTy->isIncompleteType() || EltTy->isConstantSizeType()) && 1452 "Constant array of VLAs is illegal!"); 1453 1454 // Convert the array size into a canonical width matching the pointer size for 1455 // the target. 1456 llvm::APInt ArySize(ArySizeIn); 1457 ArySize = 1458 ArySize.zextOrTrunc(Target.getPointerWidth(EltTy.getAddressSpace())); 1459 1460 llvm::FoldingSetNodeID ID; 1461 ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, IndexTypeQuals); 1462 1463 void *InsertPos = 0; 1464 if (ConstantArrayType *ATP = 1465 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1466 return QualType(ATP, 0); 1467 1468 // If the element type isn't canonical or has qualifiers, this won't 1469 // be a canonical type either, so fill in the canonical type field. 1470 QualType Canon; 1471 if (!EltTy.isCanonical() || EltTy.hasLocalQualifiers()) { 1472 SplitQualType canonSplit = getCanonicalType(EltTy).split(); 1473 Canon = getConstantArrayType(QualType(canonSplit.first, 0), ArySize, 1474 ASM, IndexTypeQuals); 1475 Canon = getQualifiedType(Canon, canonSplit.second); 1476 1477 // Get the new insert position for the node we care about. 1478 ConstantArrayType *NewIP = 1479 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1480 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1481 } 1482 1483 ConstantArrayType *New = new(*this,TypeAlignment) 1484 ConstantArrayType(EltTy, Canon, ArySize, ASM, IndexTypeQuals); 1485 ConstantArrayTypes.InsertNode(New, InsertPos); 1486 Types.push_back(New); 1487 return QualType(New, 0); 1488} 1489 1490/// getVariableArrayDecayedType - Turns the given type, which may be 1491/// variably-modified, into the corresponding type with all the known 1492/// sizes replaced with [*]. 1493QualType ASTContext::getVariableArrayDecayedType(QualType type) const { 1494 // Vastly most common case. 1495 if (!type->isVariablyModifiedType()) return type; 1496 1497 QualType result; 1498 1499 SplitQualType split = type.getSplitDesugaredType(); 1500 const Type *ty = split.first; 1501 switch (ty->getTypeClass()) { 1502#define TYPE(Class, Base) 1503#define ABSTRACT_TYPE(Class, Base) 1504#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 1505#include "clang/AST/TypeNodes.def" 1506 llvm_unreachable("didn't desugar past all non-canonical types?"); 1507 1508 // These types should never be variably-modified. 1509 case Type::Builtin: 1510 case Type::Complex: 1511 case Type::Vector: 1512 case Type::ExtVector: 1513 case Type::DependentSizedExtVector: 1514 case Type::ObjCObject: 1515 case Type::ObjCInterface: 1516 case Type::ObjCObjectPointer: 1517 case Type::Record: 1518 case Type::Enum: 1519 case Type::UnresolvedUsing: 1520 case Type::TypeOfExpr: 1521 case Type::TypeOf: 1522 case Type::Decltype: 1523 case Type::DependentName: 1524 case Type::InjectedClassName: 1525 case Type::TemplateSpecialization: 1526 case Type::DependentTemplateSpecialization: 1527 case Type::TemplateTypeParm: 1528 case Type::SubstTemplateTypeParmPack: 1529 case Type::PackExpansion: 1530 llvm_unreachable("type should never be variably-modified"); 1531 1532 // These types can be variably-modified but should never need to 1533 // further decay. 1534 case Type::FunctionNoProto: 1535 case Type::FunctionProto: 1536 case Type::BlockPointer: 1537 case Type::MemberPointer: 1538 return type; 1539 1540 // These types can be variably-modified. All these modifications 1541 // preserve structure except as noted by comments. 1542 // TODO: if we ever care about optimizing VLAs, there are no-op 1543 // optimizations available here. 1544 case Type::Pointer: 1545 result = getPointerType(getVariableArrayDecayedType( 1546 cast<PointerType>(ty)->getPointeeType())); 1547 break; 1548 1549 case Type::LValueReference: { 1550 const LValueReferenceType *lv = cast<LValueReferenceType>(ty); 1551 result = getLValueReferenceType( 1552 getVariableArrayDecayedType(lv->getPointeeType()), 1553 lv->isSpelledAsLValue()); 1554 break; 1555 } 1556 1557 case Type::RValueReference: { 1558 const RValueReferenceType *lv = cast<RValueReferenceType>(ty); 1559 result = getRValueReferenceType( 1560 getVariableArrayDecayedType(lv->getPointeeType())); 1561 break; 1562 } 1563 1564 case Type::ConstantArray: { 1565 const ConstantArrayType *cat = cast<ConstantArrayType>(ty); 1566 result = getConstantArrayType( 1567 getVariableArrayDecayedType(cat->getElementType()), 1568 cat->getSize(), 1569 cat->getSizeModifier(), 1570 cat->getIndexTypeCVRQualifiers()); 1571 break; 1572 } 1573 1574 case Type::DependentSizedArray: { 1575 const DependentSizedArrayType *dat = cast<DependentSizedArrayType>(ty); 1576 result = getDependentSizedArrayType( 1577 getVariableArrayDecayedType(dat->getElementType()), 1578 dat->getSizeExpr(), 1579 dat->getSizeModifier(), 1580 dat->getIndexTypeCVRQualifiers(), 1581 dat->getBracketsRange()); 1582 break; 1583 } 1584 1585 // Turn incomplete types into [*] types. 1586 case Type::IncompleteArray: { 1587 const IncompleteArrayType *iat = cast<IncompleteArrayType>(ty); 1588 result = getVariableArrayType( 1589 getVariableArrayDecayedType(iat->getElementType()), 1590 /*size*/ 0, 1591 ArrayType::Normal, 1592 iat->getIndexTypeCVRQualifiers(), 1593 SourceRange()); 1594 break; 1595 } 1596 1597 // Turn VLA types into [*] types. 1598 case Type::VariableArray: { 1599 const VariableArrayType *vat = cast<VariableArrayType>(ty); 1600 result = getVariableArrayType( 1601 getVariableArrayDecayedType(vat->getElementType()), 1602 /*size*/ 0, 1603 ArrayType::Star, 1604 vat->getIndexTypeCVRQualifiers(), 1605 vat->getBracketsRange()); 1606 break; 1607 } 1608 } 1609 1610 // Apply the top-level qualifiers from the original. 1611 return getQualifiedType(result, split.second); 1612} 1613 1614/// getVariableArrayType - Returns a non-unique reference to the type for a 1615/// variable array of the specified element type. 1616QualType ASTContext::getVariableArrayType(QualType EltTy, 1617 Expr *NumElts, 1618 ArrayType::ArraySizeModifier ASM, 1619 unsigned IndexTypeQuals, 1620 SourceRange Brackets) const { 1621 // Since we don't unique expressions, it isn't possible to unique VLA's 1622 // that have an expression provided for their size. 1623 QualType Canon; 1624 1625 // Be sure to pull qualifiers off the element type. 1626 if (!EltTy.isCanonical() || EltTy.hasLocalQualifiers()) { 1627 SplitQualType canonSplit = getCanonicalType(EltTy).split(); 1628 Canon = getVariableArrayType(QualType(canonSplit.first, 0), NumElts, ASM, 1629 IndexTypeQuals, Brackets); 1630 Canon = getQualifiedType(Canon, canonSplit.second); 1631 } 1632 1633 VariableArrayType *New = new(*this, TypeAlignment) 1634 VariableArrayType(EltTy, Canon, NumElts, ASM, IndexTypeQuals, Brackets); 1635 1636 VariableArrayTypes.push_back(New); 1637 Types.push_back(New); 1638 return QualType(New, 0); 1639} 1640 1641/// getDependentSizedArrayType - Returns a non-unique reference to 1642/// the type for a dependently-sized array of the specified element 1643/// type. 1644QualType ASTContext::getDependentSizedArrayType(QualType elementType, 1645 Expr *numElements, 1646 ArrayType::ArraySizeModifier ASM, 1647 unsigned elementTypeQuals, 1648 SourceRange brackets) const { 1649 assert((!numElements || numElements->isTypeDependent() || 1650 numElements->isValueDependent()) && 1651 "Size must be type- or value-dependent!"); 1652 1653 // Dependently-sized array types that do not have a specified number 1654 // of elements will have their sizes deduced from a dependent 1655 // initializer. We do no canonicalization here at all, which is okay 1656 // because they can't be used in most locations. 1657 if (!numElements) { 1658 DependentSizedArrayType *newType 1659 = new (*this, TypeAlignment) 1660 DependentSizedArrayType(*this, elementType, QualType(), 1661 numElements, ASM, elementTypeQuals, 1662 brackets); 1663 Types.push_back(newType); 1664 return QualType(newType, 0); 1665 } 1666 1667 // Otherwise, we actually build a new type every time, but we 1668 // also build a canonical type. 1669 1670 SplitQualType canonElementType = getCanonicalType(elementType).split(); 1671 1672 void *insertPos = 0; 1673 llvm::FoldingSetNodeID ID; 1674 DependentSizedArrayType::Profile(ID, *this, 1675 QualType(canonElementType.first, 0), 1676 ASM, elementTypeQuals, numElements); 1677 1678 // Look for an existing type with these properties. 1679 DependentSizedArrayType *canonTy = 1680 DependentSizedArrayTypes.FindNodeOrInsertPos(ID, insertPos); 1681 1682 // If we don't have one, build one. 1683 if (!canonTy) { 1684 canonTy = new (*this, TypeAlignment) 1685 DependentSizedArrayType(*this, QualType(canonElementType.first, 0), 1686 QualType(), numElements, ASM, elementTypeQuals, 1687 brackets); 1688 DependentSizedArrayTypes.InsertNode(canonTy, insertPos); 1689 Types.push_back(canonTy); 1690 } 1691 1692 // Apply qualifiers from the element type to the array. 1693 QualType canon = getQualifiedType(QualType(canonTy,0), 1694 canonElementType.second); 1695 1696 // If we didn't need extra canonicalization for the element type, 1697 // then just use that as our result. 1698 if (QualType(canonElementType.first, 0) == elementType) 1699 return canon; 1700 1701 // Otherwise, we need to build a type which follows the spelling 1702 // of the element type. 1703 DependentSizedArrayType *sugaredType 1704 = new (*this, TypeAlignment) 1705 DependentSizedArrayType(*this, elementType, canon, numElements, 1706 ASM, elementTypeQuals, brackets); 1707 Types.push_back(sugaredType); 1708 return QualType(sugaredType, 0); 1709} 1710 1711QualType ASTContext::getIncompleteArrayType(QualType elementType, 1712 ArrayType::ArraySizeModifier ASM, 1713 unsigned elementTypeQuals) const { 1714 llvm::FoldingSetNodeID ID; 1715 IncompleteArrayType::Profile(ID, elementType, ASM, elementTypeQuals); 1716 1717 void *insertPos = 0; 1718 if (IncompleteArrayType *iat = 1719 IncompleteArrayTypes.FindNodeOrInsertPos(ID, insertPos)) 1720 return QualType(iat, 0); 1721 1722 // If the element type isn't canonical, this won't be a canonical type 1723 // either, so fill in the canonical type field. We also have to pull 1724 // qualifiers off the element type. 1725 QualType canon; 1726 1727 if (!elementType.isCanonical() || elementType.hasLocalQualifiers()) { 1728 SplitQualType canonSplit = getCanonicalType(elementType).split(); 1729 canon = getIncompleteArrayType(QualType(canonSplit.first, 0), 1730 ASM, elementTypeQuals); 1731 canon = getQualifiedType(canon, canonSplit.second); 1732 1733 // Get the new insert position for the node we care about. 1734 IncompleteArrayType *existing = 1735 IncompleteArrayTypes.FindNodeOrInsertPos(ID, insertPos); 1736 assert(!existing && "Shouldn't be in the map!"); (void) existing; 1737 } 1738 1739 IncompleteArrayType *newType = new (*this, TypeAlignment) 1740 IncompleteArrayType(elementType, canon, ASM, elementTypeQuals); 1741 1742 IncompleteArrayTypes.InsertNode(newType, insertPos); 1743 Types.push_back(newType); 1744 return QualType(newType, 0); 1745} 1746 1747/// getVectorType - Return the unique reference to a vector type of 1748/// the specified element type and size. VectorType must be a built-in type. 1749QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts, 1750 VectorType::VectorKind VecKind) const { 1751 assert(vecType->isBuiltinType()); 1752 1753 // Check if we've already instantiated a vector of this type. 1754 llvm::FoldingSetNodeID ID; 1755 VectorType::Profile(ID, vecType, NumElts, Type::Vector, VecKind); 1756 1757 void *InsertPos = 0; 1758 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1759 return QualType(VTP, 0); 1760 1761 // If the element type isn't canonical, this won't be a canonical type either, 1762 // so fill in the canonical type field. 1763 QualType Canonical; 1764 if (!vecType.isCanonical()) { 1765 Canonical = getVectorType(getCanonicalType(vecType), NumElts, VecKind); 1766 1767 // Get the new insert position for the node we care about. 1768 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1769 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1770 } 1771 VectorType *New = new (*this, TypeAlignment) 1772 VectorType(vecType, NumElts, Canonical, VecKind); 1773 VectorTypes.InsertNode(New, InsertPos); 1774 Types.push_back(New); 1775 return QualType(New, 0); 1776} 1777 1778/// getExtVectorType - Return the unique reference to an extended vector type of 1779/// the specified element type and size. VectorType must be a built-in type. 1780QualType 1781ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) const { 1782 assert(vecType->isBuiltinType()); 1783 1784 // Check if we've already instantiated a vector of this type. 1785 llvm::FoldingSetNodeID ID; 1786 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector, 1787 VectorType::GenericVector); 1788 void *InsertPos = 0; 1789 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1790 return QualType(VTP, 0); 1791 1792 // If the element type isn't canonical, this won't be a canonical type either, 1793 // so fill in the canonical type field. 1794 QualType Canonical; 1795 if (!vecType.isCanonical()) { 1796 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts); 1797 1798 // Get the new insert position for the node we care about. 1799 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1800 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1801 } 1802 ExtVectorType *New = new (*this, TypeAlignment) 1803 ExtVectorType(vecType, NumElts, Canonical); 1804 VectorTypes.InsertNode(New, InsertPos); 1805 Types.push_back(New); 1806 return QualType(New, 0); 1807} 1808 1809QualType 1810ASTContext::getDependentSizedExtVectorType(QualType vecType, 1811 Expr *SizeExpr, 1812 SourceLocation AttrLoc) const { 1813 llvm::FoldingSetNodeID ID; 1814 DependentSizedExtVectorType::Profile(ID, *this, getCanonicalType(vecType), 1815 SizeExpr); 1816 1817 void *InsertPos = 0; 1818 DependentSizedExtVectorType *Canon 1819 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1820 DependentSizedExtVectorType *New; 1821 if (Canon) { 1822 // We already have a canonical version of this array type; use it as 1823 // the canonical type for a newly-built type. 1824 New = new (*this, TypeAlignment) 1825 DependentSizedExtVectorType(*this, vecType, QualType(Canon, 0), 1826 SizeExpr, AttrLoc); 1827 } else { 1828 QualType CanonVecTy = getCanonicalType(vecType); 1829 if (CanonVecTy == vecType) { 1830 New = new (*this, TypeAlignment) 1831 DependentSizedExtVectorType(*this, vecType, QualType(), SizeExpr, 1832 AttrLoc); 1833 1834 DependentSizedExtVectorType *CanonCheck 1835 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1836 assert(!CanonCheck && "Dependent-sized ext_vector canonical type broken"); 1837 (void)CanonCheck; 1838 DependentSizedExtVectorTypes.InsertNode(New, InsertPos); 1839 } else { 1840 QualType Canon = getDependentSizedExtVectorType(CanonVecTy, SizeExpr, 1841 SourceLocation()); 1842 New = new (*this, TypeAlignment) 1843 DependentSizedExtVectorType(*this, vecType, Canon, SizeExpr, AttrLoc); 1844 } 1845 } 1846 1847 Types.push_back(New); 1848 return QualType(New, 0); 1849} 1850 1851/// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 1852/// 1853QualType 1854ASTContext::getFunctionNoProtoType(QualType ResultTy, 1855 const FunctionType::ExtInfo &Info) const { 1856 const CallingConv CallConv = Info.getCC(); 1857 // Unique functions, to guarantee there is only one function of a particular 1858 // structure. 1859 llvm::FoldingSetNodeID ID; 1860 FunctionNoProtoType::Profile(ID, ResultTy, Info); 1861 1862 void *InsertPos = 0; 1863 if (FunctionNoProtoType *FT = 1864 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1865 return QualType(FT, 0); 1866 1867 QualType Canonical; 1868 if (!ResultTy.isCanonical() || 1869 getCanonicalCallConv(CallConv) != CallConv) { 1870 Canonical = 1871 getFunctionNoProtoType(getCanonicalType(ResultTy), 1872 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1873 1874 // Get the new insert position for the node we care about. 1875 FunctionNoProtoType *NewIP = 1876 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1877 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1878 } 1879 1880 FunctionNoProtoType *New = new (*this, TypeAlignment) 1881 FunctionNoProtoType(ResultTy, Canonical, Info); 1882 Types.push_back(New); 1883 FunctionNoProtoTypes.InsertNode(New, InsertPos); 1884 return QualType(New, 0); 1885} 1886 1887/// getFunctionType - Return a normal function type with a typed argument 1888/// list. isVariadic indicates whether the argument list includes '...'. 1889QualType 1890ASTContext::getFunctionType(QualType ResultTy, 1891 const QualType *ArgArray, unsigned NumArgs, 1892 const FunctionProtoType::ExtProtoInfo &EPI) const { 1893 // Unique functions, to guarantee there is only one function of a particular 1894 // structure. 1895 llvm::FoldingSetNodeID ID; 1896 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, EPI); 1897 1898 void *InsertPos = 0; 1899 if (FunctionProtoType *FTP = 1900 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1901 return QualType(FTP, 0); 1902 1903 // Determine whether the type being created is already canonical or not. 1904 bool isCanonical = !EPI.HasExceptionSpec && ResultTy.isCanonical(); 1905 for (unsigned i = 0; i != NumArgs && isCanonical; ++i) 1906 if (!ArgArray[i].isCanonicalAsParam()) 1907 isCanonical = false; 1908 1909 const CallingConv CallConv = EPI.ExtInfo.getCC(); 1910 1911 // If this type isn't canonical, get the canonical version of it. 1912 // The exception spec is not part of the canonical type. 1913 QualType Canonical; 1914 if (!isCanonical || getCanonicalCallConv(CallConv) != CallConv) { 1915 llvm::SmallVector<QualType, 16> CanonicalArgs; 1916 CanonicalArgs.reserve(NumArgs); 1917 for (unsigned i = 0; i != NumArgs; ++i) 1918 CanonicalArgs.push_back(getCanonicalParamType(ArgArray[i])); 1919 1920 FunctionProtoType::ExtProtoInfo CanonicalEPI = EPI; 1921 if (CanonicalEPI.HasExceptionSpec) { 1922 CanonicalEPI.HasExceptionSpec = false; 1923 CanonicalEPI.HasAnyExceptionSpec = false; 1924 CanonicalEPI.NumExceptions = 0; 1925 } 1926 CanonicalEPI.ExtInfo 1927 = CanonicalEPI.ExtInfo.withCallingConv(getCanonicalCallConv(CallConv)); 1928 1929 Canonical = getFunctionType(getCanonicalType(ResultTy), 1930 CanonicalArgs.data(), NumArgs, 1931 CanonicalEPI); 1932 1933 // Get the new insert position for the node we care about. 1934 FunctionProtoType *NewIP = 1935 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1936 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1937 } 1938 1939 // FunctionProtoType objects are allocated with extra bytes after them 1940 // for two variable size arrays (for parameter and exception types) at the 1941 // end of them. 1942 size_t Size = sizeof(FunctionProtoType) + 1943 NumArgs * sizeof(QualType) + 1944 EPI.NumExceptions * sizeof(QualType); 1945 FunctionProtoType *FTP = (FunctionProtoType*) Allocate(Size, TypeAlignment); 1946 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, Canonical, EPI); 1947 Types.push_back(FTP); 1948 FunctionProtoTypes.InsertNode(FTP, InsertPos); 1949 return QualType(FTP, 0); 1950} 1951 1952#ifndef NDEBUG 1953static bool NeedsInjectedClassNameType(const RecordDecl *D) { 1954 if (!isa<CXXRecordDecl>(D)) return false; 1955 const CXXRecordDecl *RD = cast<CXXRecordDecl>(D); 1956 if (isa<ClassTemplatePartialSpecializationDecl>(RD)) 1957 return true; 1958 if (RD->getDescribedClassTemplate() && 1959 !isa<ClassTemplateSpecializationDecl>(RD)) 1960 return true; 1961 return false; 1962} 1963#endif 1964 1965/// getInjectedClassNameType - Return the unique reference to the 1966/// injected class name type for the specified templated declaration. 1967QualType ASTContext::getInjectedClassNameType(CXXRecordDecl *Decl, 1968 QualType TST) const { 1969 assert(NeedsInjectedClassNameType(Decl)); 1970 if (Decl->TypeForDecl) { 1971 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1972 } else if (CXXRecordDecl *PrevDecl = Decl->getPreviousDeclaration()) { 1973 assert(PrevDecl->TypeForDecl && "previous declaration has no type"); 1974 Decl->TypeForDecl = PrevDecl->TypeForDecl; 1975 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1976 } else { 1977 Type *newType = 1978 new (*this, TypeAlignment) InjectedClassNameType(Decl, TST); 1979 Decl->TypeForDecl = newType; 1980 Types.push_back(newType); 1981 } 1982 return QualType(Decl->TypeForDecl, 0); 1983} 1984 1985/// getTypeDeclType - Return the unique reference to the type for the 1986/// specified type declaration. 1987QualType ASTContext::getTypeDeclTypeSlow(const TypeDecl *Decl) const { 1988 assert(Decl && "Passed null for Decl param"); 1989 assert(!Decl->TypeForDecl && "TypeForDecl present in slow case"); 1990 1991 if (const TypedefDecl *Typedef = dyn_cast<TypedefDecl>(Decl)) 1992 return getTypedefType(Typedef); 1993 1994 assert(!isa<TemplateTypeParmDecl>(Decl) && 1995 "Template type parameter types are always available."); 1996 1997 if (const RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) { 1998 assert(!Record->getPreviousDeclaration() && 1999 "struct/union has previous declaration"); 2000 assert(!NeedsInjectedClassNameType(Record)); 2001 return getRecordType(Record); 2002 } else if (const EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) { 2003 assert(!Enum->getPreviousDeclaration() && 2004 "enum has previous declaration"); 2005 return getEnumType(Enum); 2006 } else if (const UnresolvedUsingTypenameDecl *Using = 2007 dyn_cast<UnresolvedUsingTypenameDecl>(Decl)) { 2008 Type *newType = new (*this, TypeAlignment) UnresolvedUsingType(Using); 2009 Decl->TypeForDecl = newType; 2010 Types.push_back(newType); 2011 } else 2012 llvm_unreachable("TypeDecl without a type?"); 2013 2014 return QualType(Decl->TypeForDecl, 0); 2015} 2016 2017/// getTypedefType - Return the unique reference to the type for the 2018/// specified typename decl. 2019QualType 2020ASTContext::getTypedefType(const TypedefDecl *Decl, QualType Canonical) const { 2021 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2022 2023 if (Canonical.isNull()) 2024 Canonical = getCanonicalType(Decl->getUnderlyingType()); 2025 TypedefType *newType = new(*this, TypeAlignment) 2026 TypedefType(Type::Typedef, Decl, Canonical); 2027 Decl->TypeForDecl = newType; 2028 Types.push_back(newType); 2029 return QualType(newType, 0); 2030} 2031 2032QualType ASTContext::getRecordType(const RecordDecl *Decl) const { 2033 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2034 2035 if (const RecordDecl *PrevDecl = Decl->getPreviousDeclaration()) 2036 if (PrevDecl->TypeForDecl) 2037 return QualType(Decl->TypeForDecl = PrevDecl->TypeForDecl, 0); 2038 2039 RecordType *newType = new (*this, TypeAlignment) RecordType(Decl); 2040 Decl->TypeForDecl = newType; 2041 Types.push_back(newType); 2042 return QualType(newType, 0); 2043} 2044 2045QualType ASTContext::getEnumType(const EnumDecl *Decl) const { 2046 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2047 2048 if (const EnumDecl *PrevDecl = Decl->getPreviousDeclaration()) 2049 if (PrevDecl->TypeForDecl) 2050 return QualType(Decl->TypeForDecl = PrevDecl->TypeForDecl, 0); 2051 2052 EnumType *newType = new (*this, TypeAlignment) EnumType(Decl); 2053 Decl->TypeForDecl = newType; 2054 Types.push_back(newType); 2055 return QualType(newType, 0); 2056} 2057 2058QualType ASTContext::getAttributedType(AttributedType::Kind attrKind, 2059 QualType modifiedType, 2060 QualType equivalentType) { 2061 llvm::FoldingSetNodeID id; 2062 AttributedType::Profile(id, attrKind, modifiedType, equivalentType); 2063 2064 void *insertPos = 0; 2065 AttributedType *type = AttributedTypes.FindNodeOrInsertPos(id, insertPos); 2066 if (type) return QualType(type, 0); 2067 2068 QualType canon = getCanonicalType(equivalentType); 2069 type = new (*this, TypeAlignment) 2070 AttributedType(canon, attrKind, modifiedType, equivalentType); 2071 2072 Types.push_back(type); 2073 AttributedTypes.InsertNode(type, insertPos); 2074 2075 return QualType(type, 0); 2076} 2077 2078 2079/// \brief Retrieve a substitution-result type. 2080QualType 2081ASTContext::getSubstTemplateTypeParmType(const TemplateTypeParmType *Parm, 2082 QualType Replacement) const { 2083 assert(Replacement.isCanonical() 2084 && "replacement types must always be canonical"); 2085 2086 llvm::FoldingSetNodeID ID; 2087 SubstTemplateTypeParmType::Profile(ID, Parm, Replacement); 2088 void *InsertPos = 0; 2089 SubstTemplateTypeParmType *SubstParm 2090 = SubstTemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2091 2092 if (!SubstParm) { 2093 SubstParm = new (*this, TypeAlignment) 2094 SubstTemplateTypeParmType(Parm, Replacement); 2095 Types.push_back(SubstParm); 2096 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 2097 } 2098 2099 return QualType(SubstParm, 0); 2100} 2101 2102/// \brief Retrieve a 2103QualType ASTContext::getSubstTemplateTypeParmPackType( 2104 const TemplateTypeParmType *Parm, 2105 const TemplateArgument &ArgPack) { 2106#ifndef NDEBUG 2107 for (TemplateArgument::pack_iterator P = ArgPack.pack_begin(), 2108 PEnd = ArgPack.pack_end(); 2109 P != PEnd; ++P) { 2110 assert(P->getKind() == TemplateArgument::Type &&"Pack contains a non-type"); 2111 assert(P->getAsType().isCanonical() && "Pack contains non-canonical type"); 2112 } 2113#endif 2114 2115 llvm::FoldingSetNodeID ID; 2116 SubstTemplateTypeParmPackType::Profile(ID, Parm, ArgPack); 2117 void *InsertPos = 0; 2118 if (SubstTemplateTypeParmPackType *SubstParm 2119 = SubstTemplateTypeParmPackTypes.FindNodeOrInsertPos(ID, InsertPos)) 2120 return QualType(SubstParm, 0); 2121 2122 QualType Canon; 2123 if (!Parm->isCanonicalUnqualified()) { 2124 Canon = getCanonicalType(QualType(Parm, 0)); 2125 Canon = getSubstTemplateTypeParmPackType(cast<TemplateTypeParmType>(Canon), 2126 ArgPack); 2127 SubstTemplateTypeParmPackTypes.FindNodeOrInsertPos(ID, InsertPos); 2128 } 2129 2130 SubstTemplateTypeParmPackType *SubstParm 2131 = new (*this, TypeAlignment) SubstTemplateTypeParmPackType(Parm, Canon, 2132 ArgPack); 2133 Types.push_back(SubstParm); 2134 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 2135 return QualType(SubstParm, 0); 2136} 2137 2138/// \brief Retrieve the template type parameter type for a template 2139/// parameter or parameter pack with the given depth, index, and (optionally) 2140/// name. 2141QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index, 2142 bool ParameterPack, 2143 IdentifierInfo *Name) const { 2144 llvm::FoldingSetNodeID ID; 2145 TemplateTypeParmType::Profile(ID, Depth, Index, ParameterPack, Name); 2146 void *InsertPos = 0; 2147 TemplateTypeParmType *TypeParm 2148 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2149 2150 if (TypeParm) 2151 return QualType(TypeParm, 0); 2152 2153 if (Name) { 2154 QualType Canon = getTemplateTypeParmType(Depth, Index, ParameterPack); 2155 TypeParm = new (*this, TypeAlignment) 2156 TemplateTypeParmType(Depth, Index, ParameterPack, Name, Canon); 2157 2158 TemplateTypeParmType *TypeCheck 2159 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2160 assert(!TypeCheck && "Template type parameter canonical type broken"); 2161 (void)TypeCheck; 2162 } else 2163 TypeParm = new (*this, TypeAlignment) 2164 TemplateTypeParmType(Depth, Index, ParameterPack); 2165 2166 Types.push_back(TypeParm); 2167 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos); 2168 2169 return QualType(TypeParm, 0); 2170} 2171 2172TypeSourceInfo * 2173ASTContext::getTemplateSpecializationTypeInfo(TemplateName Name, 2174 SourceLocation NameLoc, 2175 const TemplateArgumentListInfo &Args, 2176 QualType CanonType) const { 2177 QualType TST = getTemplateSpecializationType(Name, Args, CanonType); 2178 2179 TypeSourceInfo *DI = CreateTypeSourceInfo(TST); 2180 TemplateSpecializationTypeLoc TL 2181 = cast<TemplateSpecializationTypeLoc>(DI->getTypeLoc()); 2182 TL.setTemplateNameLoc(NameLoc); 2183 TL.setLAngleLoc(Args.getLAngleLoc()); 2184 TL.setRAngleLoc(Args.getRAngleLoc()); 2185 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 2186 TL.setArgLocInfo(i, Args[i].getLocInfo()); 2187 return DI; 2188} 2189 2190QualType 2191ASTContext::getTemplateSpecializationType(TemplateName Template, 2192 const TemplateArgumentListInfo &Args, 2193 QualType Canon) const { 2194 unsigned NumArgs = Args.size(); 2195 2196 llvm::SmallVector<TemplateArgument, 4> ArgVec; 2197 ArgVec.reserve(NumArgs); 2198 for (unsigned i = 0; i != NumArgs; ++i) 2199 ArgVec.push_back(Args[i].getArgument()); 2200 2201 return getTemplateSpecializationType(Template, ArgVec.data(), NumArgs, 2202 Canon); 2203} 2204 2205QualType 2206ASTContext::getTemplateSpecializationType(TemplateName Template, 2207 const TemplateArgument *Args, 2208 unsigned NumArgs, 2209 QualType Canon) const { 2210 if (!Canon.isNull()) 2211 Canon = getCanonicalType(Canon); 2212 else 2213 Canon = getCanonicalTemplateSpecializationType(Template, Args, NumArgs); 2214 2215 // Allocate the (non-canonical) template specialization type, but don't 2216 // try to unique it: these types typically have location information that 2217 // we don't unique and don't want to lose. 2218 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 2219 sizeof(TemplateArgument) * NumArgs), 2220 TypeAlignment); 2221 TemplateSpecializationType *Spec 2222 = new (Mem) TemplateSpecializationType(Template, 2223 Args, NumArgs, 2224 Canon); 2225 2226 Types.push_back(Spec); 2227 return QualType(Spec, 0); 2228} 2229 2230QualType 2231ASTContext::getCanonicalTemplateSpecializationType(TemplateName Template, 2232 const TemplateArgument *Args, 2233 unsigned NumArgs) const { 2234 // Build the canonical template specialization type. 2235 TemplateName CanonTemplate = getCanonicalTemplateName(Template); 2236 llvm::SmallVector<TemplateArgument, 4> CanonArgs; 2237 CanonArgs.reserve(NumArgs); 2238 for (unsigned I = 0; I != NumArgs; ++I) 2239 CanonArgs.push_back(getCanonicalTemplateArgument(Args[I])); 2240 2241 // Determine whether this canonical template specialization type already 2242 // exists. 2243 llvm::FoldingSetNodeID ID; 2244 TemplateSpecializationType::Profile(ID, CanonTemplate, 2245 CanonArgs.data(), NumArgs, *this); 2246 2247 void *InsertPos = 0; 2248 TemplateSpecializationType *Spec 2249 = TemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2250 2251 if (!Spec) { 2252 // Allocate a new canonical template specialization type. 2253 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 2254 sizeof(TemplateArgument) * NumArgs), 2255 TypeAlignment); 2256 Spec = new (Mem) TemplateSpecializationType(CanonTemplate, 2257 CanonArgs.data(), NumArgs, 2258 QualType()); 2259 Types.push_back(Spec); 2260 TemplateSpecializationTypes.InsertNode(Spec, InsertPos); 2261 } 2262 2263 assert(Spec->isDependentType() && 2264 "Non-dependent template-id type must have a canonical type"); 2265 return QualType(Spec, 0); 2266} 2267 2268QualType 2269ASTContext::getElaboratedType(ElaboratedTypeKeyword Keyword, 2270 NestedNameSpecifier *NNS, 2271 QualType NamedType) const { 2272 llvm::FoldingSetNodeID ID; 2273 ElaboratedType::Profile(ID, Keyword, NNS, NamedType); 2274 2275 void *InsertPos = 0; 2276 ElaboratedType *T = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2277 if (T) 2278 return QualType(T, 0); 2279 2280 QualType Canon = NamedType; 2281 if (!Canon.isCanonical()) { 2282 Canon = getCanonicalType(NamedType); 2283 ElaboratedType *CheckT = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2284 assert(!CheckT && "Elaborated canonical type broken"); 2285 (void)CheckT; 2286 } 2287 2288 T = new (*this) ElaboratedType(Keyword, NNS, NamedType, Canon); 2289 Types.push_back(T); 2290 ElaboratedTypes.InsertNode(T, InsertPos); 2291 return QualType(T, 0); 2292} 2293 2294QualType 2295ASTContext::getParenType(QualType InnerType) const { 2296 llvm::FoldingSetNodeID ID; 2297 ParenType::Profile(ID, InnerType); 2298 2299 void *InsertPos = 0; 2300 ParenType *T = ParenTypes.FindNodeOrInsertPos(ID, InsertPos); 2301 if (T) 2302 return QualType(T, 0); 2303 2304 QualType Canon = InnerType; 2305 if (!Canon.isCanonical()) { 2306 Canon = getCanonicalType(InnerType); 2307 ParenType *CheckT = ParenTypes.FindNodeOrInsertPos(ID, InsertPos); 2308 assert(!CheckT && "Paren canonical type broken"); 2309 (void)CheckT; 2310 } 2311 2312 T = new (*this) ParenType(InnerType, Canon); 2313 Types.push_back(T); 2314 ParenTypes.InsertNode(T, InsertPos); 2315 return QualType(T, 0); 2316} 2317 2318QualType ASTContext::getDependentNameType(ElaboratedTypeKeyword Keyword, 2319 NestedNameSpecifier *NNS, 2320 const IdentifierInfo *Name, 2321 QualType Canon) const { 2322 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 2323 2324 if (Canon.isNull()) { 2325 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2326 ElaboratedTypeKeyword CanonKeyword = Keyword; 2327 if (Keyword == ETK_None) 2328 CanonKeyword = ETK_Typename; 2329 2330 if (CanonNNS != NNS || CanonKeyword != Keyword) 2331 Canon = getDependentNameType(CanonKeyword, CanonNNS, Name); 2332 } 2333 2334 llvm::FoldingSetNodeID ID; 2335 DependentNameType::Profile(ID, Keyword, NNS, Name); 2336 2337 void *InsertPos = 0; 2338 DependentNameType *T 2339 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 2340 if (T) 2341 return QualType(T, 0); 2342 2343 T = new (*this) DependentNameType(Keyword, NNS, Name, Canon); 2344 Types.push_back(T); 2345 DependentNameTypes.InsertNode(T, InsertPos); 2346 return QualType(T, 0); 2347} 2348 2349QualType 2350ASTContext::getDependentTemplateSpecializationType( 2351 ElaboratedTypeKeyword Keyword, 2352 NestedNameSpecifier *NNS, 2353 const IdentifierInfo *Name, 2354 const TemplateArgumentListInfo &Args) const { 2355 // TODO: avoid this copy 2356 llvm::SmallVector<TemplateArgument, 16> ArgCopy; 2357 for (unsigned I = 0, E = Args.size(); I != E; ++I) 2358 ArgCopy.push_back(Args[I].getArgument()); 2359 return getDependentTemplateSpecializationType(Keyword, NNS, Name, 2360 ArgCopy.size(), 2361 ArgCopy.data()); 2362} 2363 2364QualType 2365ASTContext::getDependentTemplateSpecializationType( 2366 ElaboratedTypeKeyword Keyword, 2367 NestedNameSpecifier *NNS, 2368 const IdentifierInfo *Name, 2369 unsigned NumArgs, 2370 const TemplateArgument *Args) const { 2371 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 2372 2373 llvm::FoldingSetNodeID ID; 2374 DependentTemplateSpecializationType::Profile(ID, *this, Keyword, NNS, 2375 Name, NumArgs, Args); 2376 2377 void *InsertPos = 0; 2378 DependentTemplateSpecializationType *T 2379 = DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2380 if (T) 2381 return QualType(T, 0); 2382 2383 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2384 2385 ElaboratedTypeKeyword CanonKeyword = Keyword; 2386 if (Keyword == ETK_None) CanonKeyword = ETK_Typename; 2387 2388 bool AnyNonCanonArgs = false; 2389 llvm::SmallVector<TemplateArgument, 16> CanonArgs(NumArgs); 2390 for (unsigned I = 0; I != NumArgs; ++I) { 2391 CanonArgs[I] = getCanonicalTemplateArgument(Args[I]); 2392 if (!CanonArgs[I].structurallyEquals(Args[I])) 2393 AnyNonCanonArgs = true; 2394 } 2395 2396 QualType Canon; 2397 if (AnyNonCanonArgs || CanonNNS != NNS || CanonKeyword != Keyword) { 2398 Canon = getDependentTemplateSpecializationType(CanonKeyword, CanonNNS, 2399 Name, NumArgs, 2400 CanonArgs.data()); 2401 2402 // Find the insert position again. 2403 DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2404 } 2405 2406 void *Mem = Allocate((sizeof(DependentTemplateSpecializationType) + 2407 sizeof(TemplateArgument) * NumArgs), 2408 TypeAlignment); 2409 T = new (Mem) DependentTemplateSpecializationType(Keyword, NNS, 2410 Name, NumArgs, Args, Canon); 2411 Types.push_back(T); 2412 DependentTemplateSpecializationTypes.InsertNode(T, InsertPos); 2413 return QualType(T, 0); 2414} 2415 2416QualType ASTContext::getPackExpansionType(QualType Pattern, 2417 llvm::Optional<unsigned> NumExpansions) { 2418 llvm::FoldingSetNodeID ID; 2419 PackExpansionType::Profile(ID, Pattern, NumExpansions); 2420 2421 assert(Pattern->containsUnexpandedParameterPack() && 2422 "Pack expansions must expand one or more parameter packs"); 2423 void *InsertPos = 0; 2424 PackExpansionType *T 2425 = PackExpansionTypes.FindNodeOrInsertPos(ID, InsertPos); 2426 if (T) 2427 return QualType(T, 0); 2428 2429 QualType Canon; 2430 if (!Pattern.isCanonical()) { 2431 Canon = getPackExpansionType(getCanonicalType(Pattern), NumExpansions); 2432 2433 // Find the insert position again. 2434 PackExpansionTypes.FindNodeOrInsertPos(ID, InsertPos); 2435 } 2436 2437 T = new (*this) PackExpansionType(Pattern, Canon, NumExpansions); 2438 Types.push_back(T); 2439 PackExpansionTypes.InsertNode(T, InsertPos); 2440 return QualType(T, 0); 2441} 2442 2443/// CmpProtocolNames - Comparison predicate for sorting protocols 2444/// alphabetically. 2445static bool CmpProtocolNames(const ObjCProtocolDecl *LHS, 2446 const ObjCProtocolDecl *RHS) { 2447 return LHS->getDeclName() < RHS->getDeclName(); 2448} 2449 2450static bool areSortedAndUniqued(ObjCProtocolDecl * const *Protocols, 2451 unsigned NumProtocols) { 2452 if (NumProtocols == 0) return true; 2453 2454 for (unsigned i = 1; i != NumProtocols; ++i) 2455 if (!CmpProtocolNames(Protocols[i-1], Protocols[i])) 2456 return false; 2457 return true; 2458} 2459 2460static void SortAndUniqueProtocols(ObjCProtocolDecl **Protocols, 2461 unsigned &NumProtocols) { 2462 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols; 2463 2464 // Sort protocols, keyed by name. 2465 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames); 2466 2467 // Remove duplicates. 2468 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd); 2469 NumProtocols = ProtocolsEnd-Protocols; 2470} 2471 2472QualType ASTContext::getObjCObjectType(QualType BaseType, 2473 ObjCProtocolDecl * const *Protocols, 2474 unsigned NumProtocols) const { 2475 // If the base type is an interface and there aren't any protocols 2476 // to add, then the interface type will do just fine. 2477 if (!NumProtocols && isa<ObjCInterfaceType>(BaseType)) 2478 return BaseType; 2479 2480 // Look in the folding set for an existing type. 2481 llvm::FoldingSetNodeID ID; 2482 ObjCObjectTypeImpl::Profile(ID, BaseType, Protocols, NumProtocols); 2483 void *InsertPos = 0; 2484 if (ObjCObjectType *QT = ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos)) 2485 return QualType(QT, 0); 2486 2487 // Build the canonical type, which has the canonical base type and 2488 // a sorted-and-uniqued list of protocols. 2489 QualType Canonical; 2490 bool ProtocolsSorted = areSortedAndUniqued(Protocols, NumProtocols); 2491 if (!ProtocolsSorted || !BaseType.isCanonical()) { 2492 if (!ProtocolsSorted) { 2493 llvm::SmallVector<ObjCProtocolDecl*, 8> Sorted(Protocols, 2494 Protocols + NumProtocols); 2495 unsigned UniqueCount = NumProtocols; 2496 2497 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2498 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2499 &Sorted[0], UniqueCount); 2500 } else { 2501 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2502 Protocols, NumProtocols); 2503 } 2504 2505 // Regenerate InsertPos. 2506 ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos); 2507 } 2508 2509 unsigned Size = sizeof(ObjCObjectTypeImpl); 2510 Size += NumProtocols * sizeof(ObjCProtocolDecl *); 2511 void *Mem = Allocate(Size, TypeAlignment); 2512 ObjCObjectTypeImpl *T = 2513 new (Mem) ObjCObjectTypeImpl(Canonical, BaseType, Protocols, NumProtocols); 2514 2515 Types.push_back(T); 2516 ObjCObjectTypes.InsertNode(T, InsertPos); 2517 return QualType(T, 0); 2518} 2519 2520/// getObjCObjectPointerType - Return a ObjCObjectPointerType type for 2521/// the given object type. 2522QualType ASTContext::getObjCObjectPointerType(QualType ObjectT) const { 2523 llvm::FoldingSetNodeID ID; 2524 ObjCObjectPointerType::Profile(ID, ObjectT); 2525 2526 void *InsertPos = 0; 2527 if (ObjCObjectPointerType *QT = 2528 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 2529 return QualType(QT, 0); 2530 2531 // Find the canonical object type. 2532 QualType Canonical; 2533 if (!ObjectT.isCanonical()) { 2534 Canonical = getObjCObjectPointerType(getCanonicalType(ObjectT)); 2535 2536 // Regenerate InsertPos. 2537 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 2538 } 2539 2540 // No match. 2541 void *Mem = Allocate(sizeof(ObjCObjectPointerType), TypeAlignment); 2542 ObjCObjectPointerType *QType = 2543 new (Mem) ObjCObjectPointerType(Canonical, ObjectT); 2544 2545 Types.push_back(QType); 2546 ObjCObjectPointerTypes.InsertNode(QType, InsertPos); 2547 return QualType(QType, 0); 2548} 2549 2550/// getObjCInterfaceType - Return the unique reference to the type for the 2551/// specified ObjC interface decl. The list of protocols is optional. 2552QualType ASTContext::getObjCInterfaceType(const ObjCInterfaceDecl *Decl) const { 2553 if (Decl->TypeForDecl) 2554 return QualType(Decl->TypeForDecl, 0); 2555 2556 // FIXME: redeclarations? 2557 void *Mem = Allocate(sizeof(ObjCInterfaceType), TypeAlignment); 2558 ObjCInterfaceType *T = new (Mem) ObjCInterfaceType(Decl); 2559 Decl->TypeForDecl = T; 2560 Types.push_back(T); 2561 return QualType(T, 0); 2562} 2563 2564/// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique 2565/// TypeOfExprType AST's (since expression's are never shared). For example, 2566/// multiple declarations that refer to "typeof(x)" all contain different 2567/// DeclRefExpr's. This doesn't effect the type checker, since it operates 2568/// on canonical type's (which are always unique). 2569QualType ASTContext::getTypeOfExprType(Expr *tofExpr) const { 2570 TypeOfExprType *toe; 2571 if (tofExpr->isTypeDependent()) { 2572 llvm::FoldingSetNodeID ID; 2573 DependentTypeOfExprType::Profile(ID, *this, tofExpr); 2574 2575 void *InsertPos = 0; 2576 DependentTypeOfExprType *Canon 2577 = DependentTypeOfExprTypes.FindNodeOrInsertPos(ID, InsertPos); 2578 if (Canon) { 2579 // We already have a "canonical" version of an identical, dependent 2580 // typeof(expr) type. Use that as our canonical type. 2581 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, 2582 QualType((TypeOfExprType*)Canon, 0)); 2583 } 2584 else { 2585 // Build a new, canonical typeof(expr) type. 2586 Canon 2587 = new (*this, TypeAlignment) DependentTypeOfExprType(*this, tofExpr); 2588 DependentTypeOfExprTypes.InsertNode(Canon, InsertPos); 2589 toe = Canon; 2590 } 2591 } else { 2592 QualType Canonical = getCanonicalType(tofExpr->getType()); 2593 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, Canonical); 2594 } 2595 Types.push_back(toe); 2596 return QualType(toe, 0); 2597} 2598 2599/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique 2600/// TypeOfType AST's. The only motivation to unique these nodes would be 2601/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be 2602/// an issue. This doesn't effect the type checker, since it operates 2603/// on canonical type's (which are always unique). 2604QualType ASTContext::getTypeOfType(QualType tofType) const { 2605 QualType Canonical = getCanonicalType(tofType); 2606 TypeOfType *tot = new (*this, TypeAlignment) TypeOfType(tofType, Canonical); 2607 Types.push_back(tot); 2608 return QualType(tot, 0); 2609} 2610 2611/// getDecltypeForExpr - Given an expr, will return the decltype for that 2612/// expression, according to the rules in C++0x [dcl.type.simple]p4 2613static QualType getDecltypeForExpr(const Expr *e, const ASTContext &Context) { 2614 if (e->isTypeDependent()) 2615 return Context.DependentTy; 2616 2617 // If e is an id expression or a class member access, decltype(e) is defined 2618 // as the type of the entity named by e. 2619 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(e)) { 2620 if (const ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl())) 2621 return VD->getType(); 2622 } 2623 if (const MemberExpr *ME = dyn_cast<MemberExpr>(e)) { 2624 if (const FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) 2625 return FD->getType(); 2626 } 2627 // If e is a function call or an invocation of an overloaded operator, 2628 // (parentheses around e are ignored), decltype(e) is defined as the 2629 // return type of that function. 2630 if (const CallExpr *CE = dyn_cast<CallExpr>(e->IgnoreParens())) 2631 return CE->getCallReturnType(); 2632 2633 QualType T = e->getType(); 2634 2635 // Otherwise, where T is the type of e, if e is an lvalue, decltype(e) is 2636 // defined as T&, otherwise decltype(e) is defined as T. 2637 if (e->isLValue()) 2638 T = Context.getLValueReferenceType(T); 2639 2640 return T; 2641} 2642 2643/// getDecltypeType - Unlike many "get<Type>" functions, we don't unique 2644/// DecltypeType AST's. The only motivation to unique these nodes would be 2645/// memory savings. Since decltype(t) is fairly uncommon, space shouldn't be 2646/// an issue. This doesn't effect the type checker, since it operates 2647/// on canonical type's (which are always unique). 2648QualType ASTContext::getDecltypeType(Expr *e) const { 2649 DecltypeType *dt; 2650 if (e->isTypeDependent()) { 2651 llvm::FoldingSetNodeID ID; 2652 DependentDecltypeType::Profile(ID, *this, e); 2653 2654 void *InsertPos = 0; 2655 DependentDecltypeType *Canon 2656 = DependentDecltypeTypes.FindNodeOrInsertPos(ID, InsertPos); 2657 if (Canon) { 2658 // We already have a "canonical" version of an equivalent, dependent 2659 // decltype type. Use that as our canonical type. 2660 dt = new (*this, TypeAlignment) DecltypeType(e, DependentTy, 2661 QualType((DecltypeType*)Canon, 0)); 2662 } 2663 else { 2664 // Build a new, canonical typeof(expr) type. 2665 Canon = new (*this, TypeAlignment) DependentDecltypeType(*this, e); 2666 DependentDecltypeTypes.InsertNode(Canon, InsertPos); 2667 dt = Canon; 2668 } 2669 } else { 2670 QualType T = getDecltypeForExpr(e, *this); 2671 dt = new (*this, TypeAlignment) DecltypeType(e, T, getCanonicalType(T)); 2672 } 2673 Types.push_back(dt); 2674 return QualType(dt, 0); 2675} 2676 2677/// getTagDeclType - Return the unique reference to the type for the 2678/// specified TagDecl (struct/union/class/enum) decl. 2679QualType ASTContext::getTagDeclType(const TagDecl *Decl) const { 2680 assert (Decl); 2681 // FIXME: What is the design on getTagDeclType when it requires casting 2682 // away const? mutable? 2683 return getTypeDeclType(const_cast<TagDecl*>(Decl)); 2684} 2685 2686/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result 2687/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and 2688/// needs to agree with the definition in <stddef.h>. 2689CanQualType ASTContext::getSizeType() const { 2690 return getFromTargetType(Target.getSizeType()); 2691} 2692 2693/// getSignedWCharType - Return the type of "signed wchar_t". 2694/// Used when in C++, as a GCC extension. 2695QualType ASTContext::getSignedWCharType() const { 2696 // FIXME: derive from "Target" ? 2697 return WCharTy; 2698} 2699 2700/// getUnsignedWCharType - Return the type of "unsigned wchar_t". 2701/// Used when in C++, as a GCC extension. 2702QualType ASTContext::getUnsignedWCharType() const { 2703 // FIXME: derive from "Target" ? 2704 return UnsignedIntTy; 2705} 2706 2707/// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 2708/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 2709QualType ASTContext::getPointerDiffType() const { 2710 return getFromTargetType(Target.getPtrDiffType(0)); 2711} 2712 2713//===----------------------------------------------------------------------===// 2714// Type Operators 2715//===----------------------------------------------------------------------===// 2716 2717CanQualType ASTContext::getCanonicalParamType(QualType T) const { 2718 // Push qualifiers into arrays, and then discard any remaining 2719 // qualifiers. 2720 T = getCanonicalType(T); 2721 T = getVariableArrayDecayedType(T); 2722 const Type *Ty = T.getTypePtr(); 2723 QualType Result; 2724 if (isa<ArrayType>(Ty)) { 2725 Result = getArrayDecayedType(QualType(Ty,0)); 2726 } else if (isa<FunctionType>(Ty)) { 2727 Result = getPointerType(QualType(Ty, 0)); 2728 } else { 2729 Result = QualType(Ty, 0); 2730 } 2731 2732 return CanQualType::CreateUnsafe(Result); 2733} 2734 2735 2736QualType ASTContext::getUnqualifiedArrayType(QualType type, 2737 Qualifiers &quals) { 2738 SplitQualType splitType = type.getSplitUnqualifiedType(); 2739 2740 // FIXME: getSplitUnqualifiedType() actually walks all the way to 2741 // the unqualified desugared type and then drops it on the floor. 2742 // We then have to strip that sugar back off with 2743 // getUnqualifiedDesugaredType(), which is silly. 2744 const ArrayType *AT = 2745 dyn_cast<ArrayType>(splitType.first->getUnqualifiedDesugaredType()); 2746 2747 // If we don't have an array, just use the results in splitType. 2748 if (!AT) { 2749 quals = splitType.second; 2750 return QualType(splitType.first, 0); 2751 } 2752 2753 // Otherwise, recurse on the array's element type. 2754 QualType elementType = AT->getElementType(); 2755 QualType unqualElementType = getUnqualifiedArrayType(elementType, quals); 2756 2757 // If that didn't change the element type, AT has no qualifiers, so we 2758 // can just use the results in splitType. 2759 if (elementType == unqualElementType) { 2760 assert(quals.empty()); // from the recursive call 2761 quals = splitType.second; 2762 return QualType(splitType.first, 0); 2763 } 2764 2765 // Otherwise, add in the qualifiers from the outermost type, then 2766 // build the type back up. 2767 quals.addConsistentQualifiers(splitType.second); 2768 2769 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) { 2770 return getConstantArrayType(unqualElementType, CAT->getSize(), 2771 CAT->getSizeModifier(), 0); 2772 } 2773 2774 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) { 2775 return getIncompleteArrayType(unqualElementType, IAT->getSizeModifier(), 0); 2776 } 2777 2778 if (const VariableArrayType *VAT = dyn_cast<VariableArrayType>(AT)) { 2779 return getVariableArrayType(unqualElementType, 2780 VAT->getSizeExpr(), 2781 VAT->getSizeModifier(), 2782 VAT->getIndexTypeCVRQualifiers(), 2783 VAT->getBracketsRange()); 2784 } 2785 2786 const DependentSizedArrayType *DSAT = cast<DependentSizedArrayType>(AT); 2787 return getDependentSizedArrayType(unqualElementType, DSAT->getSizeExpr(), 2788 DSAT->getSizeModifier(), 0, 2789 SourceRange()); 2790} 2791 2792/// UnwrapSimilarPointerTypes - If T1 and T2 are pointer types that 2793/// may be similar (C++ 4.4), replaces T1 and T2 with the type that 2794/// they point to and return true. If T1 and T2 aren't pointer types 2795/// or pointer-to-member types, or if they are not similar at this 2796/// level, returns false and leaves T1 and T2 unchanged. Top-level 2797/// qualifiers on T1 and T2 are ignored. This function will typically 2798/// be called in a loop that successively "unwraps" pointer and 2799/// pointer-to-member types to compare them at each level. 2800bool ASTContext::UnwrapSimilarPointerTypes(QualType &T1, QualType &T2) { 2801 const PointerType *T1PtrType = T1->getAs<PointerType>(), 2802 *T2PtrType = T2->getAs<PointerType>(); 2803 if (T1PtrType && T2PtrType) { 2804 T1 = T1PtrType->getPointeeType(); 2805 T2 = T2PtrType->getPointeeType(); 2806 return true; 2807 } 2808 2809 const MemberPointerType *T1MPType = T1->getAs<MemberPointerType>(), 2810 *T2MPType = T2->getAs<MemberPointerType>(); 2811 if (T1MPType && T2MPType && 2812 hasSameUnqualifiedType(QualType(T1MPType->getClass(), 0), 2813 QualType(T2MPType->getClass(), 0))) { 2814 T1 = T1MPType->getPointeeType(); 2815 T2 = T2MPType->getPointeeType(); 2816 return true; 2817 } 2818 2819 if (getLangOptions().ObjC1) { 2820 const ObjCObjectPointerType *T1OPType = T1->getAs<ObjCObjectPointerType>(), 2821 *T2OPType = T2->getAs<ObjCObjectPointerType>(); 2822 if (T1OPType && T2OPType) { 2823 T1 = T1OPType->getPointeeType(); 2824 T2 = T2OPType->getPointeeType(); 2825 return true; 2826 } 2827 } 2828 2829 // FIXME: Block pointers, too? 2830 2831 return false; 2832} 2833 2834DeclarationNameInfo 2835ASTContext::getNameForTemplate(TemplateName Name, 2836 SourceLocation NameLoc) const { 2837 if (TemplateDecl *TD = Name.getAsTemplateDecl()) 2838 // DNInfo work in progress: CHECKME: what about DNLoc? 2839 return DeclarationNameInfo(TD->getDeclName(), NameLoc); 2840 2841 if (DependentTemplateName *DTN = Name.getAsDependentTemplateName()) { 2842 DeclarationName DName; 2843 if (DTN->isIdentifier()) { 2844 DName = DeclarationNames.getIdentifier(DTN->getIdentifier()); 2845 return DeclarationNameInfo(DName, NameLoc); 2846 } else { 2847 DName = DeclarationNames.getCXXOperatorName(DTN->getOperator()); 2848 // DNInfo work in progress: FIXME: source locations? 2849 DeclarationNameLoc DNLoc; 2850 DNLoc.CXXOperatorName.BeginOpNameLoc = SourceLocation().getRawEncoding(); 2851 DNLoc.CXXOperatorName.EndOpNameLoc = SourceLocation().getRawEncoding(); 2852 return DeclarationNameInfo(DName, NameLoc, DNLoc); 2853 } 2854 } 2855 2856 OverloadedTemplateStorage *Storage = Name.getAsOverloadedTemplate(); 2857 assert(Storage); 2858 // DNInfo work in progress: CHECKME: what about DNLoc? 2859 return DeclarationNameInfo((*Storage->begin())->getDeclName(), NameLoc); 2860} 2861 2862TemplateName ASTContext::getCanonicalTemplateName(TemplateName Name) const { 2863 if (TemplateDecl *Template = Name.getAsTemplateDecl()) { 2864 if (TemplateTemplateParmDecl *TTP 2865 = dyn_cast<TemplateTemplateParmDecl>(Template)) 2866 Template = getCanonicalTemplateTemplateParmDecl(TTP); 2867 2868 // The canonical template name is the canonical template declaration. 2869 return TemplateName(cast<TemplateDecl>(Template->getCanonicalDecl())); 2870 } 2871 2872 if (SubstTemplateTemplateParmPackStorage *SubstPack 2873 = Name.getAsSubstTemplateTemplateParmPack()) { 2874 TemplateTemplateParmDecl *CanonParam 2875 = getCanonicalTemplateTemplateParmDecl(SubstPack->getParameterPack()); 2876 TemplateArgument CanonArgPack 2877 = getCanonicalTemplateArgument(SubstPack->getArgumentPack()); 2878 return getSubstTemplateTemplateParmPack(CanonParam, CanonArgPack); 2879 } 2880 2881 assert(!Name.getAsOverloadedTemplate()); 2882 2883 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 2884 assert(DTN && "Non-dependent template names must refer to template decls."); 2885 return DTN->CanonicalTemplateName; 2886} 2887 2888bool ASTContext::hasSameTemplateName(TemplateName X, TemplateName Y) { 2889 X = getCanonicalTemplateName(X); 2890 Y = getCanonicalTemplateName(Y); 2891 return X.getAsVoidPointer() == Y.getAsVoidPointer(); 2892} 2893 2894TemplateArgument 2895ASTContext::getCanonicalTemplateArgument(const TemplateArgument &Arg) const { 2896 switch (Arg.getKind()) { 2897 case TemplateArgument::Null: 2898 return Arg; 2899 2900 case TemplateArgument::Expression: 2901 return Arg; 2902 2903 case TemplateArgument::Declaration: 2904 return TemplateArgument(Arg.getAsDecl()->getCanonicalDecl()); 2905 2906 case TemplateArgument::Template: 2907 return TemplateArgument(getCanonicalTemplateName(Arg.getAsTemplate())); 2908 2909 case TemplateArgument::TemplateExpansion: 2910 return TemplateArgument(getCanonicalTemplateName( 2911 Arg.getAsTemplateOrTemplatePattern()), 2912 Arg.getNumTemplateExpansions()); 2913 2914 case TemplateArgument::Integral: 2915 return TemplateArgument(*Arg.getAsIntegral(), 2916 getCanonicalType(Arg.getIntegralType())); 2917 2918 case TemplateArgument::Type: 2919 return TemplateArgument(getCanonicalType(Arg.getAsType())); 2920 2921 case TemplateArgument::Pack: { 2922 if (Arg.pack_size() == 0) 2923 return Arg; 2924 2925 TemplateArgument *CanonArgs 2926 = new (*this) TemplateArgument[Arg.pack_size()]; 2927 unsigned Idx = 0; 2928 for (TemplateArgument::pack_iterator A = Arg.pack_begin(), 2929 AEnd = Arg.pack_end(); 2930 A != AEnd; (void)++A, ++Idx) 2931 CanonArgs[Idx] = getCanonicalTemplateArgument(*A); 2932 2933 return TemplateArgument(CanonArgs, Arg.pack_size()); 2934 } 2935 } 2936 2937 // Silence GCC warning 2938 assert(false && "Unhandled template argument kind"); 2939 return TemplateArgument(); 2940} 2941 2942NestedNameSpecifier * 2943ASTContext::getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) const { 2944 if (!NNS) 2945 return 0; 2946 2947 switch (NNS->getKind()) { 2948 case NestedNameSpecifier::Identifier: 2949 // Canonicalize the prefix but keep the identifier the same. 2950 return NestedNameSpecifier::Create(*this, 2951 getCanonicalNestedNameSpecifier(NNS->getPrefix()), 2952 NNS->getAsIdentifier()); 2953 2954 case NestedNameSpecifier::Namespace: 2955 // A namespace is canonical; build a nested-name-specifier with 2956 // this namespace and no prefix. 2957 return NestedNameSpecifier::Create(*this, 0, NNS->getAsNamespace()); 2958 2959 case NestedNameSpecifier::TypeSpec: 2960 case NestedNameSpecifier::TypeSpecWithTemplate: { 2961 QualType T = getCanonicalType(QualType(NNS->getAsType(), 0)); 2962 2963 // If we have some kind of dependent-named type (e.g., "typename T::type"), 2964 // break it apart into its prefix and identifier, then reconsititute those 2965 // as the canonical nested-name-specifier. This is required to canonicalize 2966 // a dependent nested-name-specifier involving typedefs of dependent-name 2967 // types, e.g., 2968 // typedef typename T::type T1; 2969 // typedef typename T1::type T2; 2970 if (const DependentNameType *DNT = T->getAs<DependentNameType>()) { 2971 NestedNameSpecifier *Prefix 2972 = getCanonicalNestedNameSpecifier(DNT->getQualifier()); 2973 return NestedNameSpecifier::Create(*this, Prefix, 2974 const_cast<IdentifierInfo *>(DNT->getIdentifier())); 2975 } 2976 2977 // Do the same thing as above, but with dependent-named specializations. 2978 if (const DependentTemplateSpecializationType *DTST 2979 = T->getAs<DependentTemplateSpecializationType>()) { 2980 NestedNameSpecifier *Prefix 2981 = getCanonicalNestedNameSpecifier(DTST->getQualifier()); 2982 TemplateName Name 2983 = getDependentTemplateName(Prefix, DTST->getIdentifier()); 2984 T = getTemplateSpecializationType(Name, 2985 DTST->getArgs(), DTST->getNumArgs()); 2986 T = getCanonicalType(T); 2987 } 2988 2989 return NestedNameSpecifier::Create(*this, 0, false, 2990 const_cast<Type*>(T.getTypePtr())); 2991 } 2992 2993 case NestedNameSpecifier::Global: 2994 // The global specifier is canonical and unique. 2995 return NNS; 2996 } 2997 2998 // Required to silence a GCC warning 2999 return 0; 3000} 3001 3002 3003const ArrayType *ASTContext::getAsArrayType(QualType T) const { 3004 // Handle the non-qualified case efficiently. 3005 if (!T.hasLocalQualifiers()) { 3006 // Handle the common positive case fast. 3007 if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 3008 return AT; 3009 } 3010 3011 // Handle the common negative case fast. 3012 if (!isa<ArrayType>(T.getCanonicalType())) 3013 return 0; 3014 3015 // Apply any qualifiers from the array type to the element type. This 3016 // implements C99 6.7.3p8: "If the specification of an array type includes 3017 // any type qualifiers, the element type is so qualified, not the array type." 3018 3019 // If we get here, we either have type qualifiers on the type, or we have 3020 // sugar such as a typedef in the way. If we have type qualifiers on the type 3021 // we must propagate them down into the element type. 3022 3023 SplitQualType split = T.getSplitDesugaredType(); 3024 Qualifiers qs = split.second; 3025 3026 // If we have a simple case, just return now. 3027 const ArrayType *ATy = dyn_cast<ArrayType>(split.first); 3028 if (ATy == 0 || qs.empty()) 3029 return ATy; 3030 3031 // Otherwise, we have an array and we have qualifiers on it. Push the 3032 // qualifiers into the array element type and return a new array type. 3033 QualType NewEltTy = getQualifiedType(ATy->getElementType(), qs); 3034 3035 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy)) 3036 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(), 3037 CAT->getSizeModifier(), 3038 CAT->getIndexTypeCVRQualifiers())); 3039 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy)) 3040 return cast<ArrayType>(getIncompleteArrayType(NewEltTy, 3041 IAT->getSizeModifier(), 3042 IAT->getIndexTypeCVRQualifiers())); 3043 3044 if (const DependentSizedArrayType *DSAT 3045 = dyn_cast<DependentSizedArrayType>(ATy)) 3046 return cast<ArrayType>( 3047 getDependentSizedArrayType(NewEltTy, 3048 DSAT->getSizeExpr(), 3049 DSAT->getSizeModifier(), 3050 DSAT->getIndexTypeCVRQualifiers(), 3051 DSAT->getBracketsRange())); 3052 3053 const VariableArrayType *VAT = cast<VariableArrayType>(ATy); 3054 return cast<ArrayType>(getVariableArrayType(NewEltTy, 3055 VAT->getSizeExpr(), 3056 VAT->getSizeModifier(), 3057 VAT->getIndexTypeCVRQualifiers(), 3058 VAT->getBracketsRange())); 3059} 3060 3061/// getArrayDecayedType - Return the properly qualified result of decaying the 3062/// specified array type to a pointer. This operation is non-trivial when 3063/// handling typedefs etc. The canonical type of "T" must be an array type, 3064/// this returns a pointer to a properly qualified element of the array. 3065/// 3066/// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 3067QualType ASTContext::getArrayDecayedType(QualType Ty) const { 3068 // Get the element type with 'getAsArrayType' so that we don't lose any 3069 // typedefs in the element type of the array. This also handles propagation 3070 // of type qualifiers from the array type into the element type if present 3071 // (C99 6.7.3p8). 3072 const ArrayType *PrettyArrayType = getAsArrayType(Ty); 3073 assert(PrettyArrayType && "Not an array type!"); 3074 3075 QualType PtrTy = getPointerType(PrettyArrayType->getElementType()); 3076 3077 // int x[restrict 4] -> int *restrict 3078 return getQualifiedType(PtrTy, PrettyArrayType->getIndexTypeQualifiers()); 3079} 3080 3081QualType ASTContext::getBaseElementType(const ArrayType *array) const { 3082 return getBaseElementType(array->getElementType()); 3083} 3084 3085QualType ASTContext::getBaseElementType(QualType type) const { 3086 Qualifiers qs; 3087 while (true) { 3088 SplitQualType split = type.getSplitDesugaredType(); 3089 const ArrayType *array = split.first->getAsArrayTypeUnsafe(); 3090 if (!array) break; 3091 3092 type = array->getElementType(); 3093 qs.addConsistentQualifiers(split.second); 3094 } 3095 3096 return getQualifiedType(type, qs); 3097} 3098 3099/// getConstantArrayElementCount - Returns number of constant array elements. 3100uint64_t 3101ASTContext::getConstantArrayElementCount(const ConstantArrayType *CA) const { 3102 uint64_t ElementCount = 1; 3103 do { 3104 ElementCount *= CA->getSize().getZExtValue(); 3105 CA = dyn_cast<ConstantArrayType>(CA->getElementType()); 3106 } while (CA); 3107 return ElementCount; 3108} 3109 3110/// getFloatingRank - Return a relative rank for floating point types. 3111/// This routine will assert if passed a built-in type that isn't a float. 3112static FloatingRank getFloatingRank(QualType T) { 3113 if (const ComplexType *CT = T->getAs<ComplexType>()) 3114 return getFloatingRank(CT->getElementType()); 3115 3116 assert(T->getAs<BuiltinType>() && "getFloatingRank(): not a floating type"); 3117 switch (T->getAs<BuiltinType>()->getKind()) { 3118 default: assert(0 && "getFloatingRank(): not a floating type"); 3119 case BuiltinType::Float: return FloatRank; 3120 case BuiltinType::Double: return DoubleRank; 3121 case BuiltinType::LongDouble: return LongDoubleRank; 3122 } 3123} 3124 3125/// getFloatingTypeOfSizeWithinDomain - Returns a real floating 3126/// point or a complex type (based on typeDomain/typeSize). 3127/// 'typeDomain' is a real floating point or complex type. 3128/// 'typeSize' is a real floating point or complex type. 3129QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size, 3130 QualType Domain) const { 3131 FloatingRank EltRank = getFloatingRank(Size); 3132 if (Domain->isComplexType()) { 3133 switch (EltRank) { 3134 default: assert(0 && "getFloatingRank(): illegal value for rank"); 3135 case FloatRank: return FloatComplexTy; 3136 case DoubleRank: return DoubleComplexTy; 3137 case LongDoubleRank: return LongDoubleComplexTy; 3138 } 3139 } 3140 3141 assert(Domain->isRealFloatingType() && "Unknown domain!"); 3142 switch (EltRank) { 3143 default: assert(0 && "getFloatingRank(): illegal value for rank"); 3144 case FloatRank: return FloatTy; 3145 case DoubleRank: return DoubleTy; 3146 case LongDoubleRank: return LongDoubleTy; 3147 } 3148} 3149 3150/// getFloatingTypeOrder - Compare the rank of the two specified floating 3151/// point types, ignoring the domain of the type (i.e. 'double' == 3152/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 3153/// LHS < RHS, return -1. 3154int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) const { 3155 FloatingRank LHSR = getFloatingRank(LHS); 3156 FloatingRank RHSR = getFloatingRank(RHS); 3157 3158 if (LHSR == RHSR) 3159 return 0; 3160 if (LHSR > RHSR) 3161 return 1; 3162 return -1; 3163} 3164 3165/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This 3166/// routine will assert if passed a built-in type that isn't an integer or enum, 3167/// or if it is not canonicalized. 3168unsigned ASTContext::getIntegerRank(const Type *T) const { 3169 assert(T->isCanonicalUnqualified() && "T should be canonicalized"); 3170 if (const EnumType* ET = dyn_cast<EnumType>(T)) 3171 T = ET->getDecl()->getPromotionType().getTypePtr(); 3172 3173 if (T->isSpecificBuiltinType(BuiltinType::WChar_S) || 3174 T->isSpecificBuiltinType(BuiltinType::WChar_U)) 3175 T = getFromTargetType(Target.getWCharType()).getTypePtr(); 3176 3177 if (T->isSpecificBuiltinType(BuiltinType::Char16)) 3178 T = getFromTargetType(Target.getChar16Type()).getTypePtr(); 3179 3180 if (T->isSpecificBuiltinType(BuiltinType::Char32)) 3181 T = getFromTargetType(Target.getChar32Type()).getTypePtr(); 3182 3183 switch (cast<BuiltinType>(T)->getKind()) { 3184 default: assert(0 && "getIntegerRank(): not a built-in integer"); 3185 case BuiltinType::Bool: 3186 return 1 + (getIntWidth(BoolTy) << 3); 3187 case BuiltinType::Char_S: 3188 case BuiltinType::Char_U: 3189 case BuiltinType::SChar: 3190 case BuiltinType::UChar: 3191 return 2 + (getIntWidth(CharTy) << 3); 3192 case BuiltinType::Short: 3193 case BuiltinType::UShort: 3194 return 3 + (getIntWidth(ShortTy) << 3); 3195 case BuiltinType::Int: 3196 case BuiltinType::UInt: 3197 return 4 + (getIntWidth(IntTy) << 3); 3198 case BuiltinType::Long: 3199 case BuiltinType::ULong: 3200 return 5 + (getIntWidth(LongTy) << 3); 3201 case BuiltinType::LongLong: 3202 case BuiltinType::ULongLong: 3203 return 6 + (getIntWidth(LongLongTy) << 3); 3204 case BuiltinType::Int128: 3205 case BuiltinType::UInt128: 3206 return 7 + (getIntWidth(Int128Ty) << 3); 3207 } 3208} 3209 3210/// \brief Whether this is a promotable bitfield reference according 3211/// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 3212/// 3213/// \returns the type this bit-field will promote to, or NULL if no 3214/// promotion occurs. 3215QualType ASTContext::isPromotableBitField(Expr *E) const { 3216 if (E->isTypeDependent() || E->isValueDependent()) 3217 return QualType(); 3218 3219 FieldDecl *Field = E->getBitField(); 3220 if (!Field) 3221 return QualType(); 3222 3223 QualType FT = Field->getType(); 3224 3225 llvm::APSInt BitWidthAP = Field->getBitWidth()->EvaluateAsInt(*this); 3226 uint64_t BitWidth = BitWidthAP.getZExtValue(); 3227 uint64_t IntSize = getTypeSize(IntTy); 3228 // GCC extension compatibility: if the bit-field size is less than or equal 3229 // to the size of int, it gets promoted no matter what its type is. 3230 // For instance, unsigned long bf : 4 gets promoted to signed int. 3231 if (BitWidth < IntSize) 3232 return IntTy; 3233 3234 if (BitWidth == IntSize) 3235 return FT->isSignedIntegerType() ? IntTy : UnsignedIntTy; 3236 3237 // Types bigger than int are not subject to promotions, and therefore act 3238 // like the base type. 3239 // FIXME: This doesn't quite match what gcc does, but what gcc does here 3240 // is ridiculous. 3241 return QualType(); 3242} 3243 3244/// getPromotedIntegerType - Returns the type that Promotable will 3245/// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 3246/// integer type. 3247QualType ASTContext::getPromotedIntegerType(QualType Promotable) const { 3248 assert(!Promotable.isNull()); 3249 assert(Promotable->isPromotableIntegerType()); 3250 if (const EnumType *ET = Promotable->getAs<EnumType>()) 3251 return ET->getDecl()->getPromotionType(); 3252 if (Promotable->isSignedIntegerType()) 3253 return IntTy; 3254 uint64_t PromotableSize = getTypeSize(Promotable); 3255 uint64_t IntSize = getTypeSize(IntTy); 3256 assert(Promotable->isUnsignedIntegerType() && PromotableSize <= IntSize); 3257 return (PromotableSize != IntSize) ? IntTy : UnsignedIntTy; 3258} 3259 3260/// getIntegerTypeOrder - Returns the highest ranked integer type: 3261/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 3262/// LHS < RHS, return -1. 3263int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) const { 3264 const Type *LHSC = getCanonicalType(LHS).getTypePtr(); 3265 const Type *RHSC = getCanonicalType(RHS).getTypePtr(); 3266 if (LHSC == RHSC) return 0; 3267 3268 bool LHSUnsigned = LHSC->isUnsignedIntegerType(); 3269 bool RHSUnsigned = RHSC->isUnsignedIntegerType(); 3270 3271 unsigned LHSRank = getIntegerRank(LHSC); 3272 unsigned RHSRank = getIntegerRank(RHSC); 3273 3274 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned. 3275 if (LHSRank == RHSRank) return 0; 3276 return LHSRank > RHSRank ? 1 : -1; 3277 } 3278 3279 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa. 3280 if (LHSUnsigned) { 3281 // If the unsigned [LHS] type is larger, return it. 3282 if (LHSRank >= RHSRank) 3283 return 1; 3284 3285 // If the signed type can represent all values of the unsigned type, it 3286 // wins. Because we are dealing with 2's complement and types that are 3287 // powers of two larger than each other, this is always safe. 3288 return -1; 3289 } 3290 3291 // If the unsigned [RHS] type is larger, return it. 3292 if (RHSRank >= LHSRank) 3293 return -1; 3294 3295 // If the signed type can represent all values of the unsigned type, it 3296 // wins. Because we are dealing with 2's complement and types that are 3297 // powers of two larger than each other, this is always safe. 3298 return 1; 3299} 3300 3301static RecordDecl * 3302CreateRecordDecl(const ASTContext &Ctx, RecordDecl::TagKind TK, DeclContext *DC, 3303 SourceLocation L, IdentifierInfo *Id) { 3304 if (Ctx.getLangOptions().CPlusPlus) 3305 return CXXRecordDecl::Create(Ctx, TK, DC, L, Id); 3306 else 3307 return RecordDecl::Create(Ctx, TK, DC, L, Id); 3308} 3309 3310// getCFConstantStringType - Return the type used for constant CFStrings. 3311QualType ASTContext::getCFConstantStringType() const { 3312 if (!CFConstantStringTypeDecl) { 3313 CFConstantStringTypeDecl = 3314 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3315 &Idents.get("NSConstantString")); 3316 CFConstantStringTypeDecl->startDefinition(); 3317 3318 QualType FieldTypes[4]; 3319 3320 // const int *isa; 3321 FieldTypes[0] = getPointerType(IntTy.withConst()); 3322 // int flags; 3323 FieldTypes[1] = IntTy; 3324 // const char *str; 3325 FieldTypes[2] = getPointerType(CharTy.withConst()); 3326 // long length; 3327 FieldTypes[3] = LongTy; 3328 3329 // Create fields 3330 for (unsigned i = 0; i < 4; ++i) { 3331 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl, 3332 SourceLocation(), 0, 3333 FieldTypes[i], /*TInfo=*/0, 3334 /*BitWidth=*/0, 3335 /*Mutable=*/false); 3336 Field->setAccess(AS_public); 3337 CFConstantStringTypeDecl->addDecl(Field); 3338 } 3339 3340 CFConstantStringTypeDecl->completeDefinition(); 3341 } 3342 3343 return getTagDeclType(CFConstantStringTypeDecl); 3344} 3345 3346void ASTContext::setCFConstantStringType(QualType T) { 3347 const RecordType *Rec = T->getAs<RecordType>(); 3348 assert(Rec && "Invalid CFConstantStringType"); 3349 CFConstantStringTypeDecl = Rec->getDecl(); 3350} 3351 3352// getNSConstantStringType - Return the type used for constant NSStrings. 3353QualType ASTContext::getNSConstantStringType() const { 3354 if (!NSConstantStringTypeDecl) { 3355 NSConstantStringTypeDecl = 3356 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3357 &Idents.get("__builtin_NSString")); 3358 NSConstantStringTypeDecl->startDefinition(); 3359 3360 QualType FieldTypes[3]; 3361 3362 // const int *isa; 3363 FieldTypes[0] = getPointerType(IntTy.withConst()); 3364 // const char *str; 3365 FieldTypes[1] = getPointerType(CharTy.withConst()); 3366 // unsigned int length; 3367 FieldTypes[2] = UnsignedIntTy; 3368 3369 // Create fields 3370 for (unsigned i = 0; i < 3; ++i) { 3371 FieldDecl *Field = FieldDecl::Create(*this, NSConstantStringTypeDecl, 3372 SourceLocation(), 0, 3373 FieldTypes[i], /*TInfo=*/0, 3374 /*BitWidth=*/0, 3375 /*Mutable=*/false); 3376 Field->setAccess(AS_public); 3377 NSConstantStringTypeDecl->addDecl(Field); 3378 } 3379 3380 NSConstantStringTypeDecl->completeDefinition(); 3381 } 3382 3383 return getTagDeclType(NSConstantStringTypeDecl); 3384} 3385 3386void ASTContext::setNSConstantStringType(QualType T) { 3387 const RecordType *Rec = T->getAs<RecordType>(); 3388 assert(Rec && "Invalid NSConstantStringType"); 3389 NSConstantStringTypeDecl = Rec->getDecl(); 3390} 3391 3392QualType ASTContext::getObjCFastEnumerationStateType() const { 3393 if (!ObjCFastEnumerationStateTypeDecl) { 3394 ObjCFastEnumerationStateTypeDecl = 3395 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3396 &Idents.get("__objcFastEnumerationState")); 3397 ObjCFastEnumerationStateTypeDecl->startDefinition(); 3398 3399 QualType FieldTypes[] = { 3400 UnsignedLongTy, 3401 getPointerType(ObjCIdTypedefType), 3402 getPointerType(UnsignedLongTy), 3403 getConstantArrayType(UnsignedLongTy, 3404 llvm::APInt(32, 5), ArrayType::Normal, 0) 3405 }; 3406 3407 for (size_t i = 0; i < 4; ++i) { 3408 FieldDecl *Field = FieldDecl::Create(*this, 3409 ObjCFastEnumerationStateTypeDecl, 3410 SourceLocation(), 0, 3411 FieldTypes[i], /*TInfo=*/0, 3412 /*BitWidth=*/0, 3413 /*Mutable=*/false); 3414 Field->setAccess(AS_public); 3415 ObjCFastEnumerationStateTypeDecl->addDecl(Field); 3416 } 3417 3418 ObjCFastEnumerationStateTypeDecl->completeDefinition(); 3419 } 3420 3421 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 3422} 3423 3424QualType ASTContext::getBlockDescriptorType() const { 3425 if (BlockDescriptorType) 3426 return getTagDeclType(BlockDescriptorType); 3427 3428 RecordDecl *T; 3429 // FIXME: Needs the FlagAppleBlock bit. 3430 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3431 &Idents.get("__block_descriptor")); 3432 T->startDefinition(); 3433 3434 QualType FieldTypes[] = { 3435 UnsignedLongTy, 3436 UnsignedLongTy, 3437 }; 3438 3439 const char *FieldNames[] = { 3440 "reserved", 3441 "Size" 3442 }; 3443 3444 for (size_t i = 0; i < 2; ++i) { 3445 FieldDecl *Field = FieldDecl::Create(*this, 3446 T, 3447 SourceLocation(), 3448 &Idents.get(FieldNames[i]), 3449 FieldTypes[i], /*TInfo=*/0, 3450 /*BitWidth=*/0, 3451 /*Mutable=*/false); 3452 Field->setAccess(AS_public); 3453 T->addDecl(Field); 3454 } 3455 3456 T->completeDefinition(); 3457 3458 BlockDescriptorType = T; 3459 3460 return getTagDeclType(BlockDescriptorType); 3461} 3462 3463void ASTContext::setBlockDescriptorType(QualType T) { 3464 const RecordType *Rec = T->getAs<RecordType>(); 3465 assert(Rec && "Invalid BlockDescriptorType"); 3466 BlockDescriptorType = Rec->getDecl(); 3467} 3468 3469QualType ASTContext::getBlockDescriptorExtendedType() const { 3470 if (BlockDescriptorExtendedType) 3471 return getTagDeclType(BlockDescriptorExtendedType); 3472 3473 RecordDecl *T; 3474 // FIXME: Needs the FlagAppleBlock bit. 3475 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3476 &Idents.get("__block_descriptor_withcopydispose")); 3477 T->startDefinition(); 3478 3479 QualType FieldTypes[] = { 3480 UnsignedLongTy, 3481 UnsignedLongTy, 3482 getPointerType(VoidPtrTy), 3483 getPointerType(VoidPtrTy) 3484 }; 3485 3486 const char *FieldNames[] = { 3487 "reserved", 3488 "Size", 3489 "CopyFuncPtr", 3490 "DestroyFuncPtr" 3491 }; 3492 3493 for (size_t i = 0; i < 4; ++i) { 3494 FieldDecl *Field = FieldDecl::Create(*this, 3495 T, 3496 SourceLocation(), 3497 &Idents.get(FieldNames[i]), 3498 FieldTypes[i], /*TInfo=*/0, 3499 /*BitWidth=*/0, 3500 /*Mutable=*/false); 3501 Field->setAccess(AS_public); 3502 T->addDecl(Field); 3503 } 3504 3505 T->completeDefinition(); 3506 3507 BlockDescriptorExtendedType = T; 3508 3509 return getTagDeclType(BlockDescriptorExtendedType); 3510} 3511 3512void ASTContext::setBlockDescriptorExtendedType(QualType T) { 3513 const RecordType *Rec = T->getAs<RecordType>(); 3514 assert(Rec && "Invalid BlockDescriptorType"); 3515 BlockDescriptorExtendedType = Rec->getDecl(); 3516} 3517 3518bool ASTContext::BlockRequiresCopying(QualType Ty) const { 3519 if (Ty->isBlockPointerType()) 3520 return true; 3521 if (isObjCNSObjectType(Ty)) 3522 return true; 3523 if (Ty->isObjCObjectPointerType()) 3524 return true; 3525 if (getLangOptions().CPlusPlus) { 3526 if (const RecordType *RT = Ty->getAs<RecordType>()) { 3527 CXXRecordDecl *RD = cast<CXXRecordDecl>(RT->getDecl()); 3528 return RD->hasConstCopyConstructor(*this); 3529 3530 } 3531 } 3532 return false; 3533} 3534 3535QualType 3536ASTContext::BuildByRefType(llvm::StringRef DeclName, QualType Ty) const { 3537 // type = struct __Block_byref_1_X { 3538 // void *__isa; 3539 // struct __Block_byref_1_X *__forwarding; 3540 // unsigned int __flags; 3541 // unsigned int __size; 3542 // void *__copy_helper; // as needed 3543 // void *__destroy_help // as needed 3544 // int X; 3545 // } * 3546 3547 bool HasCopyAndDispose = BlockRequiresCopying(Ty); 3548 3549 // FIXME: Move up 3550 llvm::SmallString<36> Name; 3551 llvm::raw_svector_ostream(Name) << "__Block_byref_" << 3552 ++UniqueBlockByRefTypeID << '_' << DeclName; 3553 RecordDecl *T; 3554 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3555 &Idents.get(Name.str())); 3556 T->startDefinition(); 3557 QualType Int32Ty = IntTy; 3558 assert(getIntWidth(IntTy) == 32 && "non-32bit int not supported"); 3559 QualType FieldTypes[] = { 3560 getPointerType(VoidPtrTy), 3561 getPointerType(getTagDeclType(T)), 3562 Int32Ty, 3563 Int32Ty, 3564 getPointerType(VoidPtrTy), 3565 getPointerType(VoidPtrTy), 3566 Ty 3567 }; 3568 3569 llvm::StringRef FieldNames[] = { 3570 "__isa", 3571 "__forwarding", 3572 "__flags", 3573 "__size", 3574 "__copy_helper", 3575 "__destroy_helper", 3576 DeclName, 3577 }; 3578 3579 for (size_t i = 0; i < 7; ++i) { 3580 if (!HasCopyAndDispose && i >=4 && i <= 5) 3581 continue; 3582 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3583 &Idents.get(FieldNames[i]), 3584 FieldTypes[i], /*TInfo=*/0, 3585 /*BitWidth=*/0, /*Mutable=*/false); 3586 Field->setAccess(AS_public); 3587 T->addDecl(Field); 3588 } 3589 3590 T->completeDefinition(); 3591 3592 return getPointerType(getTagDeclType(T)); 3593} 3594 3595 3596QualType ASTContext::getBlockParmType( 3597 bool BlockHasCopyDispose, 3598 llvm::SmallVectorImpl<const Expr *> &Layout) const { 3599 3600 // FIXME: Move up 3601 llvm::SmallString<36> Name; 3602 llvm::raw_svector_ostream(Name) << "__block_literal_" 3603 << ++UniqueBlockParmTypeID; 3604 RecordDecl *T; 3605 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3606 &Idents.get(Name.str())); 3607 T->startDefinition(); 3608 QualType FieldTypes[] = { 3609 getPointerType(VoidPtrTy), 3610 IntTy, 3611 IntTy, 3612 getPointerType(VoidPtrTy), 3613 (BlockHasCopyDispose ? 3614 getPointerType(getBlockDescriptorExtendedType()) : 3615 getPointerType(getBlockDescriptorType())) 3616 }; 3617 3618 const char *FieldNames[] = { 3619 "__isa", 3620 "__flags", 3621 "__reserved", 3622 "__FuncPtr", 3623 "__descriptor" 3624 }; 3625 3626 for (size_t i = 0; i < 5; ++i) { 3627 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3628 &Idents.get(FieldNames[i]), 3629 FieldTypes[i], /*TInfo=*/0, 3630 /*BitWidth=*/0, /*Mutable=*/false); 3631 Field->setAccess(AS_public); 3632 T->addDecl(Field); 3633 } 3634 3635 for (unsigned i = 0; i < Layout.size(); ++i) { 3636 const Expr *E = Layout[i]; 3637 3638 QualType FieldType = E->getType(); 3639 IdentifierInfo *FieldName = 0; 3640 if (isa<CXXThisExpr>(E)) { 3641 FieldName = &Idents.get("this"); 3642 } else if (const BlockDeclRefExpr *BDRE = dyn_cast<BlockDeclRefExpr>(E)) { 3643 const ValueDecl *D = BDRE->getDecl(); 3644 FieldName = D->getIdentifier(); 3645 if (BDRE->isByRef()) 3646 FieldType = BuildByRefType(D->getName(), FieldType); 3647 } else { 3648 // Padding. 3649 assert(isa<ConstantArrayType>(FieldType) && 3650 isa<DeclRefExpr>(E) && 3651 !cast<DeclRefExpr>(E)->getDecl()->getDeclName() && 3652 "doesn't match characteristics of padding decl"); 3653 } 3654 3655 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3656 FieldName, FieldType, /*TInfo=*/0, 3657 /*BitWidth=*/0, /*Mutable=*/false); 3658 Field->setAccess(AS_public); 3659 T->addDecl(Field); 3660 } 3661 3662 T->completeDefinition(); 3663 3664 return getPointerType(getTagDeclType(T)); 3665} 3666 3667void ASTContext::setObjCFastEnumerationStateType(QualType T) { 3668 const RecordType *Rec = T->getAs<RecordType>(); 3669 assert(Rec && "Invalid ObjCFAstEnumerationStateType"); 3670 ObjCFastEnumerationStateTypeDecl = Rec->getDecl(); 3671} 3672 3673// This returns true if a type has been typedefed to BOOL: 3674// typedef <type> BOOL; 3675static bool isTypeTypedefedAsBOOL(QualType T) { 3676 if (const TypedefType *TT = dyn_cast<TypedefType>(T)) 3677 if (IdentifierInfo *II = TT->getDecl()->getIdentifier()) 3678 return II->isStr("BOOL"); 3679 3680 return false; 3681} 3682 3683/// getObjCEncodingTypeSize returns size of type for objective-c encoding 3684/// purpose. 3685CharUnits ASTContext::getObjCEncodingTypeSize(QualType type) const { 3686 CharUnits sz = getTypeSizeInChars(type); 3687 3688 // Make all integer and enum types at least as large as an int 3689 if (sz.isPositive() && type->isIntegralOrEnumerationType()) 3690 sz = std::max(sz, getTypeSizeInChars(IntTy)); 3691 // Treat arrays as pointers, since that's how they're passed in. 3692 else if (type->isArrayType()) 3693 sz = getTypeSizeInChars(VoidPtrTy); 3694 return sz; 3695} 3696 3697static inline 3698std::string charUnitsToString(const CharUnits &CU) { 3699 return llvm::itostr(CU.getQuantity()); 3700} 3701 3702/// getObjCEncodingForBlock - Return the encoded type for this block 3703/// declaration. 3704std::string ASTContext::getObjCEncodingForBlock(const BlockExpr *Expr) const { 3705 std::string S; 3706 3707 const BlockDecl *Decl = Expr->getBlockDecl(); 3708 QualType BlockTy = 3709 Expr->getType()->getAs<BlockPointerType>()->getPointeeType(); 3710 // Encode result type. 3711 getObjCEncodingForType(BlockTy->getAs<FunctionType>()->getResultType(), S); 3712 // Compute size of all parameters. 3713 // Start with computing size of a pointer in number of bytes. 3714 // FIXME: There might(should) be a better way of doing this computation! 3715 SourceLocation Loc; 3716 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3717 CharUnits ParmOffset = PtrSize; 3718 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), 3719 E = Decl->param_end(); PI != E; ++PI) { 3720 QualType PType = (*PI)->getType(); 3721 CharUnits sz = getObjCEncodingTypeSize(PType); 3722 assert (sz.isPositive() && "BlockExpr - Incomplete param type"); 3723 ParmOffset += sz; 3724 } 3725 // Size of the argument frame 3726 S += charUnitsToString(ParmOffset); 3727 // Block pointer and offset. 3728 S += "@?0"; 3729 ParmOffset = PtrSize; 3730 3731 // Argument types. 3732 ParmOffset = PtrSize; 3733 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), E = 3734 Decl->param_end(); PI != E; ++PI) { 3735 ParmVarDecl *PVDecl = *PI; 3736 QualType PType = PVDecl->getOriginalType(); 3737 if (const ArrayType *AT = 3738 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3739 // Use array's original type only if it has known number of 3740 // elements. 3741 if (!isa<ConstantArrayType>(AT)) 3742 PType = PVDecl->getType(); 3743 } else if (PType->isFunctionType()) 3744 PType = PVDecl->getType(); 3745 getObjCEncodingForType(PType, S); 3746 S += charUnitsToString(ParmOffset); 3747 ParmOffset += getObjCEncodingTypeSize(PType); 3748 } 3749 3750 return S; 3751} 3752 3753void ASTContext::getObjCEncodingForFunctionDecl(const FunctionDecl *Decl, 3754 std::string& S) { 3755 // Encode result type. 3756 getObjCEncodingForType(Decl->getResultType(), S); 3757 CharUnits ParmOffset; 3758 // Compute size of all parameters. 3759 for (FunctionDecl::param_const_iterator PI = Decl->param_begin(), 3760 E = Decl->param_end(); PI != E; ++PI) { 3761 QualType PType = (*PI)->getType(); 3762 CharUnits sz = getObjCEncodingTypeSize(PType); 3763 assert (sz.isPositive() && 3764 "getObjCEncodingForMethodDecl - Incomplete param type"); 3765 ParmOffset += sz; 3766 } 3767 S += charUnitsToString(ParmOffset); 3768 ParmOffset = CharUnits::Zero(); 3769 3770 // Argument types. 3771 for (FunctionDecl::param_const_iterator PI = Decl->param_begin(), 3772 E = Decl->param_end(); PI != E; ++PI) { 3773 ParmVarDecl *PVDecl = *PI; 3774 QualType PType = PVDecl->getOriginalType(); 3775 if (const ArrayType *AT = 3776 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3777 // Use array's original type only if it has known number of 3778 // elements. 3779 if (!isa<ConstantArrayType>(AT)) 3780 PType = PVDecl->getType(); 3781 } else if (PType->isFunctionType()) 3782 PType = PVDecl->getType(); 3783 getObjCEncodingForType(PType, S); 3784 S += charUnitsToString(ParmOffset); 3785 ParmOffset += getObjCEncodingTypeSize(PType); 3786 } 3787} 3788 3789/// getObjCEncodingForMethodDecl - Return the encoded type for this method 3790/// declaration. 3791void ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, 3792 std::string& S) const { 3793 // FIXME: This is not very efficient. 3794 // Encode type qualifer, 'in', 'inout', etc. for the return type. 3795 getObjCEncodingForTypeQualifier(Decl->getObjCDeclQualifier(), S); 3796 // Encode result type. 3797 getObjCEncodingForType(Decl->getResultType(), S); 3798 // Compute size of all parameters. 3799 // Start with computing size of a pointer in number of bytes. 3800 // FIXME: There might(should) be a better way of doing this computation! 3801 SourceLocation Loc; 3802 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3803 // The first two arguments (self and _cmd) are pointers; account for 3804 // their size. 3805 CharUnits ParmOffset = 2 * PtrSize; 3806 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3807 E = Decl->sel_param_end(); PI != E; ++PI) { 3808 QualType PType = (*PI)->getType(); 3809 CharUnits sz = getObjCEncodingTypeSize(PType); 3810 assert (sz.isPositive() && 3811 "getObjCEncodingForMethodDecl - Incomplete param type"); 3812 ParmOffset += sz; 3813 } 3814 S += charUnitsToString(ParmOffset); 3815 S += "@0:"; 3816 S += charUnitsToString(PtrSize); 3817 3818 // Argument types. 3819 ParmOffset = 2 * PtrSize; 3820 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3821 E = Decl->sel_param_end(); PI != E; ++PI) { 3822 ParmVarDecl *PVDecl = *PI; 3823 QualType PType = PVDecl->getOriginalType(); 3824 if (const ArrayType *AT = 3825 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3826 // Use array's original type only if it has known number of 3827 // elements. 3828 if (!isa<ConstantArrayType>(AT)) 3829 PType = PVDecl->getType(); 3830 } else if (PType->isFunctionType()) 3831 PType = PVDecl->getType(); 3832 // Process argument qualifiers for user supplied arguments; such as, 3833 // 'in', 'inout', etc. 3834 getObjCEncodingForTypeQualifier(PVDecl->getObjCDeclQualifier(), S); 3835 getObjCEncodingForType(PType, S); 3836 S += charUnitsToString(ParmOffset); 3837 ParmOffset += getObjCEncodingTypeSize(PType); 3838 } 3839} 3840 3841/// getObjCEncodingForPropertyDecl - Return the encoded type for this 3842/// property declaration. If non-NULL, Container must be either an 3843/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be 3844/// NULL when getting encodings for protocol properties. 3845/// Property attributes are stored as a comma-delimited C string. The simple 3846/// attributes readonly and bycopy are encoded as single characters. The 3847/// parametrized attributes, getter=name, setter=name, and ivar=name, are 3848/// encoded as single characters, followed by an identifier. Property types 3849/// are also encoded as a parametrized attribute. The characters used to encode 3850/// these attributes are defined by the following enumeration: 3851/// @code 3852/// enum PropertyAttributes { 3853/// kPropertyReadOnly = 'R', // property is read-only. 3854/// kPropertyBycopy = 'C', // property is a copy of the value last assigned 3855/// kPropertyByref = '&', // property is a reference to the value last assigned 3856/// kPropertyDynamic = 'D', // property is dynamic 3857/// kPropertyGetter = 'G', // followed by getter selector name 3858/// kPropertySetter = 'S', // followed by setter selector name 3859/// kPropertyInstanceVariable = 'V' // followed by instance variable name 3860/// kPropertyType = 't' // followed by old-style type encoding. 3861/// kPropertyWeak = 'W' // 'weak' property 3862/// kPropertyStrong = 'P' // property GC'able 3863/// kPropertyNonAtomic = 'N' // property non-atomic 3864/// }; 3865/// @endcode 3866void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 3867 const Decl *Container, 3868 std::string& S) const { 3869 // Collect information from the property implementation decl(s). 3870 bool Dynamic = false; 3871 ObjCPropertyImplDecl *SynthesizePID = 0; 3872 3873 // FIXME: Duplicated code due to poor abstraction. 3874 if (Container) { 3875 if (const ObjCCategoryImplDecl *CID = 3876 dyn_cast<ObjCCategoryImplDecl>(Container)) { 3877 for (ObjCCategoryImplDecl::propimpl_iterator 3878 i = CID->propimpl_begin(), e = CID->propimpl_end(); 3879 i != e; ++i) { 3880 ObjCPropertyImplDecl *PID = *i; 3881 if (PID->getPropertyDecl() == PD) { 3882 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3883 Dynamic = true; 3884 } else { 3885 SynthesizePID = PID; 3886 } 3887 } 3888 } 3889 } else { 3890 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container); 3891 for (ObjCCategoryImplDecl::propimpl_iterator 3892 i = OID->propimpl_begin(), e = OID->propimpl_end(); 3893 i != e; ++i) { 3894 ObjCPropertyImplDecl *PID = *i; 3895 if (PID->getPropertyDecl() == PD) { 3896 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3897 Dynamic = true; 3898 } else { 3899 SynthesizePID = PID; 3900 } 3901 } 3902 } 3903 } 3904 } 3905 3906 // FIXME: This is not very efficient. 3907 S = "T"; 3908 3909 // Encode result type. 3910 // GCC has some special rules regarding encoding of properties which 3911 // closely resembles encoding of ivars. 3912 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, 0, 3913 true /* outermost type */, 3914 true /* encoding for property */); 3915 3916 if (PD->isReadOnly()) { 3917 S += ",R"; 3918 } else { 3919 switch (PD->getSetterKind()) { 3920 case ObjCPropertyDecl::Assign: break; 3921 case ObjCPropertyDecl::Copy: S += ",C"; break; 3922 case ObjCPropertyDecl::Retain: S += ",&"; break; 3923 } 3924 } 3925 3926 // It really isn't clear at all what this means, since properties 3927 // are "dynamic by default". 3928 if (Dynamic) 3929 S += ",D"; 3930 3931 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) 3932 S += ",N"; 3933 3934 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) { 3935 S += ",G"; 3936 S += PD->getGetterName().getAsString(); 3937 } 3938 3939 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) { 3940 S += ",S"; 3941 S += PD->getSetterName().getAsString(); 3942 } 3943 3944 if (SynthesizePID) { 3945 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl(); 3946 S += ",V"; 3947 S += OID->getNameAsString(); 3948 } 3949 3950 // FIXME: OBJCGC: weak & strong 3951} 3952 3953/// getLegacyIntegralTypeEncoding - 3954/// Another legacy compatibility encoding: 32-bit longs are encoded as 3955/// 'l' or 'L' , but not always. For typedefs, we need to use 3956/// 'i' or 'I' instead if encoding a struct field, or a pointer! 3957/// 3958void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const { 3959 if (isa<TypedefType>(PointeeTy.getTypePtr())) { 3960 if (const BuiltinType *BT = PointeeTy->getAs<BuiltinType>()) { 3961 if (BT->getKind() == BuiltinType::ULong && getIntWidth(PointeeTy) == 32) 3962 PointeeTy = UnsignedIntTy; 3963 else 3964 if (BT->getKind() == BuiltinType::Long && getIntWidth(PointeeTy) == 32) 3965 PointeeTy = IntTy; 3966 } 3967 } 3968} 3969 3970void ASTContext::getObjCEncodingForType(QualType T, std::string& S, 3971 const FieldDecl *Field) const { 3972 // We follow the behavior of gcc, expanding structures which are 3973 // directly pointed to, and expanding embedded structures. Note that 3974 // these rules are sufficient to prevent recursive encoding of the 3975 // same type. 3976 getObjCEncodingForTypeImpl(T, S, true, true, Field, 3977 true /* outermost type */); 3978} 3979 3980static char ObjCEncodingForPrimitiveKind(const ASTContext *C, QualType T) { 3981 switch (T->getAs<BuiltinType>()->getKind()) { 3982 default: assert(0 && "Unhandled builtin type kind"); 3983 case BuiltinType::Void: return 'v'; 3984 case BuiltinType::Bool: return 'B'; 3985 case BuiltinType::Char_U: 3986 case BuiltinType::UChar: return 'C'; 3987 case BuiltinType::UShort: return 'S'; 3988 case BuiltinType::UInt: return 'I'; 3989 case BuiltinType::ULong: 3990 return C->getIntWidth(T) == 32 ? 'L' : 'Q'; 3991 case BuiltinType::UInt128: return 'T'; 3992 case BuiltinType::ULongLong: return 'Q'; 3993 case BuiltinType::Char_S: 3994 case BuiltinType::SChar: return 'c'; 3995 case BuiltinType::Short: return 's'; 3996 case BuiltinType::WChar_S: 3997 case BuiltinType::WChar_U: 3998 case BuiltinType::Int: return 'i'; 3999 case BuiltinType::Long: 4000 return C->getIntWidth(T) == 32 ? 'l' : 'q'; 4001 case BuiltinType::LongLong: return 'q'; 4002 case BuiltinType::Int128: return 't'; 4003 case BuiltinType::Float: return 'f'; 4004 case BuiltinType::Double: return 'd'; 4005 case BuiltinType::LongDouble: return 'D'; 4006 } 4007} 4008 4009static void EncodeBitField(const ASTContext *Ctx, std::string& S, 4010 QualType T, const FieldDecl *FD) { 4011 const Expr *E = FD->getBitWidth(); 4012 assert(E && "bitfield width not there - getObjCEncodingForTypeImpl"); 4013 S += 'b'; 4014 // The NeXT runtime encodes bit fields as b followed by the number of bits. 4015 // The GNU runtime requires more information; bitfields are encoded as b, 4016 // then the offset (in bits) of the first element, then the type of the 4017 // bitfield, then the size in bits. For example, in this structure: 4018 // 4019 // struct 4020 // { 4021 // int integer; 4022 // int flags:2; 4023 // }; 4024 // On a 32-bit system, the encoding for flags would be b2 for the NeXT 4025 // runtime, but b32i2 for the GNU runtime. The reason for this extra 4026 // information is not especially sensible, but we're stuck with it for 4027 // compatibility with GCC, although providing it breaks anything that 4028 // actually uses runtime introspection and wants to work on both runtimes... 4029 if (!Ctx->getLangOptions().NeXTRuntime) { 4030 const RecordDecl *RD = FD->getParent(); 4031 const ASTRecordLayout &RL = Ctx->getASTRecordLayout(RD); 4032 // FIXME: This same linear search is also used in ExprConstant - it might 4033 // be better if the FieldDecl stored its offset. We'd be increasing the 4034 // size of the object slightly, but saving some time every time it is used. 4035 unsigned i = 0; 4036 for (RecordDecl::field_iterator Field = RD->field_begin(), 4037 FieldEnd = RD->field_end(); 4038 Field != FieldEnd; (void)++Field, ++i) { 4039 if (*Field == FD) 4040 break; 4041 } 4042 S += llvm::utostr(RL.getFieldOffset(i)); 4043 if (T->isEnumeralType()) 4044 S += 'i'; 4045 else 4046 S += ObjCEncodingForPrimitiveKind(Ctx, T); 4047 } 4048 unsigned N = E->EvaluateAsInt(*Ctx).getZExtValue(); 4049 S += llvm::utostr(N); 4050} 4051 4052// FIXME: Use SmallString for accumulating string. 4053void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S, 4054 bool ExpandPointedToStructures, 4055 bool ExpandStructures, 4056 const FieldDecl *FD, 4057 bool OutermostType, 4058 bool EncodingProperty) const { 4059 if (T->getAs<BuiltinType>()) { 4060 if (FD && FD->isBitField()) 4061 return EncodeBitField(this, S, T, FD); 4062 S += ObjCEncodingForPrimitiveKind(this, T); 4063 return; 4064 } 4065 4066 if (const ComplexType *CT = T->getAs<ComplexType>()) { 4067 S += 'j'; 4068 getObjCEncodingForTypeImpl(CT->getElementType(), S, false, false, 0, false, 4069 false); 4070 return; 4071 } 4072 4073 // encoding for pointer or r3eference types. 4074 QualType PointeeTy; 4075 if (const PointerType *PT = T->getAs<PointerType>()) { 4076 if (PT->isObjCSelType()) { 4077 S += ':'; 4078 return; 4079 } 4080 PointeeTy = PT->getPointeeType(); 4081 } 4082 else if (const ReferenceType *RT = T->getAs<ReferenceType>()) 4083 PointeeTy = RT->getPointeeType(); 4084 if (!PointeeTy.isNull()) { 4085 bool isReadOnly = false; 4086 // For historical/compatibility reasons, the read-only qualifier of the 4087 // pointee gets emitted _before_ the '^'. The read-only qualifier of 4088 // the pointer itself gets ignored, _unless_ we are looking at a typedef! 4089 // Also, do not emit the 'r' for anything but the outermost type! 4090 if (isa<TypedefType>(T.getTypePtr())) { 4091 if (OutermostType && T.isConstQualified()) { 4092 isReadOnly = true; 4093 S += 'r'; 4094 } 4095 } else if (OutermostType) { 4096 QualType P = PointeeTy; 4097 while (P->getAs<PointerType>()) 4098 P = P->getAs<PointerType>()->getPointeeType(); 4099 if (P.isConstQualified()) { 4100 isReadOnly = true; 4101 S += 'r'; 4102 } 4103 } 4104 if (isReadOnly) { 4105 // Another legacy compatibility encoding. Some ObjC qualifier and type 4106 // combinations need to be rearranged. 4107 // Rewrite "in const" from "nr" to "rn" 4108 if (llvm::StringRef(S).endswith("nr")) 4109 S.replace(S.end()-2, S.end(), "rn"); 4110 } 4111 4112 if (PointeeTy->isCharType()) { 4113 // char pointer types should be encoded as '*' unless it is a 4114 // type that has been typedef'd to 'BOOL'. 4115 if (!isTypeTypedefedAsBOOL(PointeeTy)) { 4116 S += '*'; 4117 return; 4118 } 4119 } else if (const RecordType *RTy = PointeeTy->getAs<RecordType>()) { 4120 // GCC binary compat: Need to convert "struct objc_class *" to "#". 4121 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_class")) { 4122 S += '#'; 4123 return; 4124 } 4125 // GCC binary compat: Need to convert "struct objc_object *" to "@". 4126 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_object")) { 4127 S += '@'; 4128 return; 4129 } 4130 // fall through... 4131 } 4132 S += '^'; 4133 getLegacyIntegralTypeEncoding(PointeeTy); 4134 4135 getObjCEncodingForTypeImpl(PointeeTy, S, false, ExpandPointedToStructures, 4136 NULL); 4137 return; 4138 } 4139 4140 if (const ArrayType *AT = 4141 // Ignore type qualifiers etc. 4142 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) { 4143 if (isa<IncompleteArrayType>(AT)) { 4144 // Incomplete arrays are encoded as a pointer to the array element. 4145 S += '^'; 4146 4147 getObjCEncodingForTypeImpl(AT->getElementType(), S, 4148 false, ExpandStructures, FD); 4149 } else { 4150 S += '['; 4151 4152 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 4153 S += llvm::utostr(CAT->getSize().getZExtValue()); 4154 else { 4155 //Variable length arrays are encoded as a regular array with 0 elements. 4156 assert(isa<VariableArrayType>(AT) && "Unknown array type!"); 4157 S += '0'; 4158 } 4159 4160 getObjCEncodingForTypeImpl(AT->getElementType(), S, 4161 false, ExpandStructures, FD); 4162 S += ']'; 4163 } 4164 return; 4165 } 4166 4167 if (T->getAs<FunctionType>()) { 4168 S += '?'; 4169 return; 4170 } 4171 4172 if (const RecordType *RTy = T->getAs<RecordType>()) { 4173 RecordDecl *RDecl = RTy->getDecl(); 4174 S += RDecl->isUnion() ? '(' : '{'; 4175 // Anonymous structures print as '?' 4176 if (const IdentifierInfo *II = RDecl->getIdentifier()) { 4177 S += II->getName(); 4178 if (ClassTemplateSpecializationDecl *Spec 4179 = dyn_cast<ClassTemplateSpecializationDecl>(RDecl)) { 4180 const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs(); 4181 std::string TemplateArgsStr 4182 = TemplateSpecializationType::PrintTemplateArgumentList( 4183 TemplateArgs.data(), 4184 TemplateArgs.size(), 4185 (*this).PrintingPolicy); 4186 4187 S += TemplateArgsStr; 4188 } 4189 } else { 4190 S += '?'; 4191 } 4192 if (ExpandStructures) { 4193 S += '='; 4194 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 4195 FieldEnd = RDecl->field_end(); 4196 Field != FieldEnd; ++Field) { 4197 if (FD) { 4198 S += '"'; 4199 S += Field->getNameAsString(); 4200 S += '"'; 4201 } 4202 4203 // Special case bit-fields. 4204 if (Field->isBitField()) { 4205 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, 4206 (*Field)); 4207 } else { 4208 QualType qt = Field->getType(); 4209 getLegacyIntegralTypeEncoding(qt); 4210 getObjCEncodingForTypeImpl(qt, S, false, true, 4211 FD); 4212 } 4213 } 4214 } 4215 S += RDecl->isUnion() ? ')' : '}'; 4216 return; 4217 } 4218 4219 if (T->isEnumeralType()) { 4220 if (FD && FD->isBitField()) 4221 EncodeBitField(this, S, T, FD); 4222 else 4223 S += 'i'; 4224 return; 4225 } 4226 4227 if (T->isBlockPointerType()) { 4228 S += "@?"; // Unlike a pointer-to-function, which is "^?". 4229 return; 4230 } 4231 4232 // Ignore protocol qualifiers when mangling at this level. 4233 if (const ObjCObjectType *OT = T->getAs<ObjCObjectType>()) 4234 T = OT->getBaseType(); 4235 4236 if (const ObjCInterfaceType *OIT = T->getAs<ObjCInterfaceType>()) { 4237 // @encode(class_name) 4238 ObjCInterfaceDecl *OI = OIT->getDecl(); 4239 S += '{'; 4240 const IdentifierInfo *II = OI->getIdentifier(); 4241 S += II->getName(); 4242 S += '='; 4243 llvm::SmallVector<ObjCIvarDecl*, 32> Ivars; 4244 DeepCollectObjCIvars(OI, true, Ivars); 4245 for (unsigned i = 0, e = Ivars.size(); i != e; ++i) { 4246 FieldDecl *Field = cast<FieldDecl>(Ivars[i]); 4247 if (Field->isBitField()) 4248 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, Field); 4249 else 4250 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, FD); 4251 } 4252 S += '}'; 4253 return; 4254 } 4255 4256 if (const ObjCObjectPointerType *OPT = T->getAs<ObjCObjectPointerType>()) { 4257 if (OPT->isObjCIdType()) { 4258 S += '@'; 4259 return; 4260 } 4261 4262 if (OPT->isObjCClassType() || OPT->isObjCQualifiedClassType()) { 4263 // FIXME: Consider if we need to output qualifiers for 'Class<p>'. 4264 // Since this is a binary compatibility issue, need to consult with runtime 4265 // folks. Fortunately, this is a *very* obsure construct. 4266 S += '#'; 4267 return; 4268 } 4269 4270 if (OPT->isObjCQualifiedIdType()) { 4271 getObjCEncodingForTypeImpl(getObjCIdType(), S, 4272 ExpandPointedToStructures, 4273 ExpandStructures, FD); 4274 if (FD || EncodingProperty) { 4275 // Note that we do extended encoding of protocol qualifer list 4276 // Only when doing ivar or property encoding. 4277 S += '"'; 4278 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 4279 E = OPT->qual_end(); I != E; ++I) { 4280 S += '<'; 4281 S += (*I)->getNameAsString(); 4282 S += '>'; 4283 } 4284 S += '"'; 4285 } 4286 return; 4287 } 4288 4289 QualType PointeeTy = OPT->getPointeeType(); 4290 if (!EncodingProperty && 4291 isa<TypedefType>(PointeeTy.getTypePtr())) { 4292 // Another historical/compatibility reason. 4293 // We encode the underlying type which comes out as 4294 // {...}; 4295 S += '^'; 4296 getObjCEncodingForTypeImpl(PointeeTy, S, 4297 false, ExpandPointedToStructures, 4298 NULL); 4299 return; 4300 } 4301 4302 S += '@'; 4303 if (OPT->getInterfaceDecl() && (FD || EncodingProperty)) { 4304 S += '"'; 4305 S += OPT->getInterfaceDecl()->getIdentifier()->getName(); 4306 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 4307 E = OPT->qual_end(); I != E; ++I) { 4308 S += '<'; 4309 S += (*I)->getNameAsString(); 4310 S += '>'; 4311 } 4312 S += '"'; 4313 } 4314 return; 4315 } 4316 4317 // gcc just blithely ignores member pointers. 4318 // TODO: maybe there should be a mangling for these 4319 if (T->getAs<MemberPointerType>()) 4320 return; 4321 4322 if (T->isVectorType()) { 4323 // This matches gcc's encoding, even though technically it is 4324 // insufficient. 4325 // FIXME. We should do a better job than gcc. 4326 return; 4327 } 4328 4329 assert(0 && "@encode for type not implemented!"); 4330} 4331 4332void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 4333 std::string& S) const { 4334 if (QT & Decl::OBJC_TQ_In) 4335 S += 'n'; 4336 if (QT & Decl::OBJC_TQ_Inout) 4337 S += 'N'; 4338 if (QT & Decl::OBJC_TQ_Out) 4339 S += 'o'; 4340 if (QT & Decl::OBJC_TQ_Bycopy) 4341 S += 'O'; 4342 if (QT & Decl::OBJC_TQ_Byref) 4343 S += 'R'; 4344 if (QT & Decl::OBJC_TQ_Oneway) 4345 S += 'V'; 4346} 4347 4348void ASTContext::setBuiltinVaListType(QualType T) { 4349 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!"); 4350 4351 BuiltinVaListType = T; 4352} 4353 4354void ASTContext::setObjCIdType(QualType T) { 4355 ObjCIdTypedefType = T; 4356} 4357 4358void ASTContext::setObjCSelType(QualType T) { 4359 ObjCSelTypedefType = T; 4360} 4361 4362void ASTContext::setObjCProtoType(QualType QT) { 4363 ObjCProtoType = QT; 4364} 4365 4366void ASTContext::setObjCClassType(QualType T) { 4367 ObjCClassTypedefType = T; 4368} 4369 4370void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) { 4371 assert(ObjCConstantStringType.isNull() && 4372 "'NSConstantString' type already set!"); 4373 4374 ObjCConstantStringType = getObjCInterfaceType(Decl); 4375} 4376 4377/// \brief Retrieve the template name that corresponds to a non-empty 4378/// lookup. 4379TemplateName 4380ASTContext::getOverloadedTemplateName(UnresolvedSetIterator Begin, 4381 UnresolvedSetIterator End) const { 4382 unsigned size = End - Begin; 4383 assert(size > 1 && "set is not overloaded!"); 4384 4385 void *memory = Allocate(sizeof(OverloadedTemplateStorage) + 4386 size * sizeof(FunctionTemplateDecl*)); 4387 OverloadedTemplateStorage *OT = new(memory) OverloadedTemplateStorage(size); 4388 4389 NamedDecl **Storage = OT->getStorage(); 4390 for (UnresolvedSetIterator I = Begin; I != End; ++I) { 4391 NamedDecl *D = *I; 4392 assert(isa<FunctionTemplateDecl>(D) || 4393 (isa<UsingShadowDecl>(D) && 4394 isa<FunctionTemplateDecl>(D->getUnderlyingDecl()))); 4395 *Storage++ = D; 4396 } 4397 4398 return TemplateName(OT); 4399} 4400 4401/// \brief Retrieve the template name that represents a qualified 4402/// template name such as \c std::vector. 4403TemplateName 4404ASTContext::getQualifiedTemplateName(NestedNameSpecifier *NNS, 4405 bool TemplateKeyword, 4406 TemplateDecl *Template) const { 4407 // FIXME: Canonicalization? 4408 llvm::FoldingSetNodeID ID; 4409 QualifiedTemplateName::Profile(ID, NNS, TemplateKeyword, Template); 4410 4411 void *InsertPos = 0; 4412 QualifiedTemplateName *QTN = 4413 QualifiedTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4414 if (!QTN) { 4415 QTN = new (*this,4) QualifiedTemplateName(NNS, TemplateKeyword, Template); 4416 QualifiedTemplateNames.InsertNode(QTN, InsertPos); 4417 } 4418 4419 return TemplateName(QTN); 4420} 4421 4422/// \brief Retrieve the template name that represents a dependent 4423/// template name such as \c MetaFun::template apply. 4424TemplateName 4425ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 4426 const IdentifierInfo *Name) const { 4427 assert((!NNS || NNS->isDependent()) && 4428 "Nested name specifier must be dependent"); 4429 4430 llvm::FoldingSetNodeID ID; 4431 DependentTemplateName::Profile(ID, NNS, Name); 4432 4433 void *InsertPos = 0; 4434 DependentTemplateName *QTN = 4435 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4436 4437 if (QTN) 4438 return TemplateName(QTN); 4439 4440 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 4441 if (CanonNNS == NNS) { 4442 QTN = new (*this,4) DependentTemplateName(NNS, Name); 4443 } else { 4444 TemplateName Canon = getDependentTemplateName(CanonNNS, Name); 4445 QTN = new (*this,4) DependentTemplateName(NNS, Name, Canon); 4446 DependentTemplateName *CheckQTN = 4447 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4448 assert(!CheckQTN && "Dependent type name canonicalization broken"); 4449 (void)CheckQTN; 4450 } 4451 4452 DependentTemplateNames.InsertNode(QTN, InsertPos); 4453 return TemplateName(QTN); 4454} 4455 4456/// \brief Retrieve the template name that represents a dependent 4457/// template name such as \c MetaFun::template operator+. 4458TemplateName 4459ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 4460 OverloadedOperatorKind Operator) const { 4461 assert((!NNS || NNS->isDependent()) && 4462 "Nested name specifier must be dependent"); 4463 4464 llvm::FoldingSetNodeID ID; 4465 DependentTemplateName::Profile(ID, NNS, Operator); 4466 4467 void *InsertPos = 0; 4468 DependentTemplateName *QTN 4469 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4470 4471 if (QTN) 4472 return TemplateName(QTN); 4473 4474 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 4475 if (CanonNNS == NNS) { 4476 QTN = new (*this,4) DependentTemplateName(NNS, Operator); 4477 } else { 4478 TemplateName Canon = getDependentTemplateName(CanonNNS, Operator); 4479 QTN = new (*this,4) DependentTemplateName(NNS, Operator, Canon); 4480 4481 DependentTemplateName *CheckQTN 4482 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4483 assert(!CheckQTN && "Dependent template name canonicalization broken"); 4484 (void)CheckQTN; 4485 } 4486 4487 DependentTemplateNames.InsertNode(QTN, InsertPos); 4488 return TemplateName(QTN); 4489} 4490 4491TemplateName 4492ASTContext::getSubstTemplateTemplateParmPack(TemplateTemplateParmDecl *Param, 4493 const TemplateArgument &ArgPack) const { 4494 ASTContext &Self = const_cast<ASTContext &>(*this); 4495 llvm::FoldingSetNodeID ID; 4496 SubstTemplateTemplateParmPackStorage::Profile(ID, Self, Param, ArgPack); 4497 4498 void *InsertPos = 0; 4499 SubstTemplateTemplateParmPackStorage *Subst 4500 = SubstTemplateTemplateParmPacks.FindNodeOrInsertPos(ID, InsertPos); 4501 4502 if (!Subst) { 4503 Subst = new (*this) SubstTemplateTemplateParmPackStorage(Self, Param, 4504 ArgPack.pack_size(), 4505 ArgPack.pack_begin()); 4506 SubstTemplateTemplateParmPacks.InsertNode(Subst, InsertPos); 4507 } 4508 4509 return TemplateName(Subst); 4510} 4511 4512/// getFromTargetType - Given one of the integer types provided by 4513/// TargetInfo, produce the corresponding type. The unsigned @p Type 4514/// is actually a value of type @c TargetInfo::IntType. 4515CanQualType ASTContext::getFromTargetType(unsigned Type) const { 4516 switch (Type) { 4517 case TargetInfo::NoInt: return CanQualType(); 4518 case TargetInfo::SignedShort: return ShortTy; 4519 case TargetInfo::UnsignedShort: return UnsignedShortTy; 4520 case TargetInfo::SignedInt: return IntTy; 4521 case TargetInfo::UnsignedInt: return UnsignedIntTy; 4522 case TargetInfo::SignedLong: return LongTy; 4523 case TargetInfo::UnsignedLong: return UnsignedLongTy; 4524 case TargetInfo::SignedLongLong: return LongLongTy; 4525 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy; 4526 } 4527 4528 assert(false && "Unhandled TargetInfo::IntType value"); 4529 return CanQualType(); 4530} 4531 4532//===----------------------------------------------------------------------===// 4533// Type Predicates. 4534//===----------------------------------------------------------------------===// 4535 4536/// isObjCNSObjectType - Return true if this is an NSObject object using 4537/// NSObject attribute on a c-style pointer type. 4538/// FIXME - Make it work directly on types. 4539/// FIXME: Move to Type. 4540/// 4541bool ASTContext::isObjCNSObjectType(QualType Ty) const { 4542 if (const TypedefType *TDT = dyn_cast<TypedefType>(Ty)) { 4543 if (TypedefDecl *TD = TDT->getDecl()) 4544 if (TD->getAttr<ObjCNSObjectAttr>()) 4545 return true; 4546 } 4547 return false; 4548} 4549 4550/// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 4551/// garbage collection attribute. 4552/// 4553Qualifiers::GC ASTContext::getObjCGCAttrKind(QualType Ty) const { 4554 if (getLangOptions().getGCMode() == LangOptions::NonGC) 4555 return Qualifiers::GCNone; 4556 4557 assert(getLangOptions().ObjC1); 4558 Qualifiers::GC GCAttrs = Ty.getObjCGCAttr(); 4559 4560 // Default behaviour under objective-C's gc is for ObjC pointers 4561 // (or pointers to them) be treated as though they were declared 4562 // as __strong. 4563 if (GCAttrs == Qualifiers::GCNone) { 4564 if (Ty->isObjCObjectPointerType() || Ty->isBlockPointerType()) 4565 return Qualifiers::Strong; 4566 else if (Ty->isPointerType()) 4567 return getObjCGCAttrKind(Ty->getAs<PointerType>()->getPointeeType()); 4568 } else { 4569 // It's not valid to set GC attributes on anything that isn't a 4570 // pointer. 4571#ifndef NDEBUG 4572 QualType CT = Ty->getCanonicalTypeInternal(); 4573 while (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 4574 CT = AT->getElementType(); 4575 assert(CT->isAnyPointerType() || CT->isBlockPointerType()); 4576#endif 4577 } 4578 return GCAttrs; 4579} 4580 4581//===----------------------------------------------------------------------===// 4582// Type Compatibility Testing 4583//===----------------------------------------------------------------------===// 4584 4585/// areCompatVectorTypes - Return true if the two specified vector types are 4586/// compatible. 4587static bool areCompatVectorTypes(const VectorType *LHS, 4588 const VectorType *RHS) { 4589 assert(LHS->isCanonicalUnqualified() && RHS->isCanonicalUnqualified()); 4590 return LHS->getElementType() == RHS->getElementType() && 4591 LHS->getNumElements() == RHS->getNumElements(); 4592} 4593 4594bool ASTContext::areCompatibleVectorTypes(QualType FirstVec, 4595 QualType SecondVec) { 4596 assert(FirstVec->isVectorType() && "FirstVec should be a vector type"); 4597 assert(SecondVec->isVectorType() && "SecondVec should be a vector type"); 4598 4599 if (hasSameUnqualifiedType(FirstVec, SecondVec)) 4600 return true; 4601 4602 // Treat Neon vector types and most AltiVec vector types as if they are the 4603 // equivalent GCC vector types. 4604 const VectorType *First = FirstVec->getAs<VectorType>(); 4605 const VectorType *Second = SecondVec->getAs<VectorType>(); 4606 if (First->getNumElements() == Second->getNumElements() && 4607 hasSameType(First->getElementType(), Second->getElementType()) && 4608 First->getVectorKind() != VectorType::AltiVecPixel && 4609 First->getVectorKind() != VectorType::AltiVecBool && 4610 Second->getVectorKind() != VectorType::AltiVecPixel && 4611 Second->getVectorKind() != VectorType::AltiVecBool) 4612 return true; 4613 4614 return false; 4615} 4616 4617//===----------------------------------------------------------------------===// 4618// ObjCQualifiedIdTypesAreCompatible - Compatibility testing for qualified id's. 4619//===----------------------------------------------------------------------===// 4620 4621/// ProtocolCompatibleWithProtocol - return 'true' if 'lProto' is in the 4622/// inheritance hierarchy of 'rProto'. 4623bool 4624ASTContext::ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 4625 ObjCProtocolDecl *rProto) const { 4626 if (lProto == rProto) 4627 return true; 4628 for (ObjCProtocolDecl::protocol_iterator PI = rProto->protocol_begin(), 4629 E = rProto->protocol_end(); PI != E; ++PI) 4630 if (ProtocolCompatibleWithProtocol(lProto, *PI)) 4631 return true; 4632 return false; 4633} 4634 4635/// QualifiedIdConformsQualifiedId - compare id<p,...> with id<p1,...> 4636/// return true if lhs's protocols conform to rhs's protocol; false 4637/// otherwise. 4638bool ASTContext::QualifiedIdConformsQualifiedId(QualType lhs, QualType rhs) { 4639 if (lhs->isObjCQualifiedIdType() && rhs->isObjCQualifiedIdType()) 4640 return ObjCQualifiedIdTypesAreCompatible(lhs, rhs, false); 4641 return false; 4642} 4643 4644/// ObjCQualifiedClassTypesAreCompatible - compare Class<p,...> and 4645/// Class<p1, ...>. 4646bool ASTContext::ObjCQualifiedClassTypesAreCompatible(QualType lhs, 4647 QualType rhs) { 4648 const ObjCObjectPointerType *lhsQID = lhs->getAs<ObjCObjectPointerType>(); 4649 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 4650 assert ((lhsQID && rhsOPT) && "ObjCQualifiedClassTypesAreCompatible"); 4651 4652 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4653 E = lhsQID->qual_end(); I != E; ++I) { 4654 bool match = false; 4655 ObjCProtocolDecl *lhsProto = *I; 4656 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 4657 E = rhsOPT->qual_end(); J != E; ++J) { 4658 ObjCProtocolDecl *rhsProto = *J; 4659 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto)) { 4660 match = true; 4661 break; 4662 } 4663 } 4664 if (!match) 4665 return false; 4666 } 4667 return true; 4668} 4669 4670/// ObjCQualifiedIdTypesAreCompatible - We know that one of lhs/rhs is an 4671/// ObjCQualifiedIDType. 4672bool ASTContext::ObjCQualifiedIdTypesAreCompatible(QualType lhs, QualType rhs, 4673 bool compare) { 4674 // Allow id<P..> and an 'id' or void* type in all cases. 4675 if (lhs->isVoidPointerType() || 4676 lhs->isObjCIdType() || lhs->isObjCClassType()) 4677 return true; 4678 else if (rhs->isVoidPointerType() || 4679 rhs->isObjCIdType() || rhs->isObjCClassType()) 4680 return true; 4681 4682 if (const ObjCObjectPointerType *lhsQID = lhs->getAsObjCQualifiedIdType()) { 4683 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 4684 4685 if (!rhsOPT) return false; 4686 4687 if (rhsOPT->qual_empty()) { 4688 // If the RHS is a unqualified interface pointer "NSString*", 4689 // make sure we check the class hierarchy. 4690 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4691 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4692 E = lhsQID->qual_end(); I != E; ++I) { 4693 // when comparing an id<P> on lhs with a static type on rhs, 4694 // see if static class implements all of id's protocols, directly or 4695 // through its super class and categories. 4696 if (!rhsID->ClassImplementsProtocol(*I, true)) 4697 return false; 4698 } 4699 } 4700 // If there are no qualifiers and no interface, we have an 'id'. 4701 return true; 4702 } 4703 // Both the right and left sides have qualifiers. 4704 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4705 E = lhsQID->qual_end(); I != E; ++I) { 4706 ObjCProtocolDecl *lhsProto = *I; 4707 bool match = false; 4708 4709 // when comparing an id<P> on lhs with a static type on rhs, 4710 // see if static class implements all of id's protocols, directly or 4711 // through its super class and categories. 4712 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 4713 E = rhsOPT->qual_end(); J != E; ++J) { 4714 ObjCProtocolDecl *rhsProto = *J; 4715 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4716 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4717 match = true; 4718 break; 4719 } 4720 } 4721 // If the RHS is a qualified interface pointer "NSString<P>*", 4722 // make sure we check the class hierarchy. 4723 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4724 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4725 E = lhsQID->qual_end(); I != E; ++I) { 4726 // when comparing an id<P> on lhs with a static type on rhs, 4727 // see if static class implements all of id's protocols, directly or 4728 // through its super class and categories. 4729 if (rhsID->ClassImplementsProtocol(*I, true)) { 4730 match = true; 4731 break; 4732 } 4733 } 4734 } 4735 if (!match) 4736 return false; 4737 } 4738 4739 return true; 4740 } 4741 4742 const ObjCObjectPointerType *rhsQID = rhs->getAsObjCQualifiedIdType(); 4743 assert(rhsQID && "One of the LHS/RHS should be id<x>"); 4744 4745 if (const ObjCObjectPointerType *lhsOPT = 4746 lhs->getAsObjCInterfacePointerType()) { 4747 // If both the right and left sides have qualifiers. 4748 for (ObjCObjectPointerType::qual_iterator I = lhsOPT->qual_begin(), 4749 E = lhsOPT->qual_end(); I != E; ++I) { 4750 ObjCProtocolDecl *lhsProto = *I; 4751 bool match = false; 4752 4753 // when comparing an id<P> on rhs with a static type on lhs, 4754 // see if static class implements all of id's protocols, directly or 4755 // through its super class and categories. 4756 // First, lhs protocols in the qualifier list must be found, direct 4757 // or indirect in rhs's qualifier list or it is a mismatch. 4758 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 4759 E = rhsQID->qual_end(); J != E; ++J) { 4760 ObjCProtocolDecl *rhsProto = *J; 4761 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4762 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4763 match = true; 4764 break; 4765 } 4766 } 4767 if (!match) 4768 return false; 4769 } 4770 4771 // Static class's protocols, or its super class or category protocols 4772 // must be found, direct or indirect in rhs's qualifier list or it is a mismatch. 4773 if (ObjCInterfaceDecl *lhsID = lhsOPT->getInterfaceDecl()) { 4774 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 4775 CollectInheritedProtocols(lhsID, LHSInheritedProtocols); 4776 // This is rather dubious but matches gcc's behavior. If lhs has 4777 // no type qualifier and its class has no static protocol(s) 4778 // assume that it is mismatch. 4779 if (LHSInheritedProtocols.empty() && lhsOPT->qual_empty()) 4780 return false; 4781 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 4782 LHSInheritedProtocols.begin(), 4783 E = LHSInheritedProtocols.end(); I != E; ++I) { 4784 bool match = false; 4785 ObjCProtocolDecl *lhsProto = (*I); 4786 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 4787 E = rhsQID->qual_end(); J != E; ++J) { 4788 ObjCProtocolDecl *rhsProto = *J; 4789 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4790 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4791 match = true; 4792 break; 4793 } 4794 } 4795 if (!match) 4796 return false; 4797 } 4798 } 4799 return true; 4800 } 4801 return false; 4802} 4803 4804/// canAssignObjCInterfaces - Return true if the two interface types are 4805/// compatible for assignment from RHS to LHS. This handles validation of any 4806/// protocol qualifiers on the LHS or RHS. 4807/// 4808bool ASTContext::canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 4809 const ObjCObjectPointerType *RHSOPT) { 4810 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 4811 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 4812 4813 // If either type represents the built-in 'id' or 'Class' types, return true. 4814 if (LHS->isObjCUnqualifiedIdOrClass() || 4815 RHS->isObjCUnqualifiedIdOrClass()) 4816 return true; 4817 4818 if (LHS->isObjCQualifiedId() || RHS->isObjCQualifiedId()) 4819 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4820 QualType(RHSOPT,0), 4821 false); 4822 4823 if (LHS->isObjCQualifiedClass() && RHS->isObjCQualifiedClass()) 4824 return ObjCQualifiedClassTypesAreCompatible(QualType(LHSOPT,0), 4825 QualType(RHSOPT,0)); 4826 4827 // If we have 2 user-defined types, fall into that path. 4828 if (LHS->getInterface() && RHS->getInterface()) 4829 return canAssignObjCInterfaces(LHS, RHS); 4830 4831 return false; 4832} 4833 4834/// canAssignObjCInterfacesInBlockPointer - This routine is specifically written 4835/// for providing type-safty for objective-c pointers used to pass/return 4836/// arguments in block literals. When passed as arguments, passing 'A*' where 4837/// 'id' is expected is not OK. Passing 'Sub *" where 'Super *" is expected is 4838/// not OK. For the return type, the opposite is not OK. 4839bool ASTContext::canAssignObjCInterfacesInBlockPointer( 4840 const ObjCObjectPointerType *LHSOPT, 4841 const ObjCObjectPointerType *RHSOPT) { 4842 if (RHSOPT->isObjCBuiltinType() || LHSOPT->isObjCIdType()) 4843 return true; 4844 4845 if (LHSOPT->isObjCBuiltinType()) { 4846 return RHSOPT->isObjCBuiltinType() || RHSOPT->isObjCQualifiedIdType(); 4847 } 4848 4849 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 4850 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4851 QualType(RHSOPT,0), 4852 false); 4853 4854 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4855 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4856 if (LHS && RHS) { // We have 2 user-defined types. 4857 if (LHS != RHS) { 4858 if (LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 4859 return false; 4860 if (RHS->getDecl()->isSuperClassOf(LHS->getDecl())) 4861 return true; 4862 } 4863 else 4864 return true; 4865 } 4866 return false; 4867} 4868 4869/// getIntersectionOfProtocols - This routine finds the intersection of set 4870/// of protocols inherited from two distinct objective-c pointer objects. 4871/// It is used to build composite qualifier list of the composite type of 4872/// the conditional expression involving two objective-c pointer objects. 4873static 4874void getIntersectionOfProtocols(ASTContext &Context, 4875 const ObjCObjectPointerType *LHSOPT, 4876 const ObjCObjectPointerType *RHSOPT, 4877 llvm::SmallVectorImpl<ObjCProtocolDecl *> &IntersectionOfProtocols) { 4878 4879 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 4880 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 4881 assert(LHS->getInterface() && "LHS must have an interface base"); 4882 assert(RHS->getInterface() && "RHS must have an interface base"); 4883 4884 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> InheritedProtocolSet; 4885 unsigned LHSNumProtocols = LHS->getNumProtocols(); 4886 if (LHSNumProtocols > 0) 4887 InheritedProtocolSet.insert(LHS->qual_begin(), LHS->qual_end()); 4888 else { 4889 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 4890 Context.CollectInheritedProtocols(LHS->getInterface(), 4891 LHSInheritedProtocols); 4892 InheritedProtocolSet.insert(LHSInheritedProtocols.begin(), 4893 LHSInheritedProtocols.end()); 4894 } 4895 4896 unsigned RHSNumProtocols = RHS->getNumProtocols(); 4897 if (RHSNumProtocols > 0) { 4898 ObjCProtocolDecl **RHSProtocols = 4899 const_cast<ObjCProtocolDecl **>(RHS->qual_begin()); 4900 for (unsigned i = 0; i < RHSNumProtocols; ++i) 4901 if (InheritedProtocolSet.count(RHSProtocols[i])) 4902 IntersectionOfProtocols.push_back(RHSProtocols[i]); 4903 } 4904 else { 4905 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> RHSInheritedProtocols; 4906 Context.CollectInheritedProtocols(RHS->getInterface(), 4907 RHSInheritedProtocols); 4908 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 4909 RHSInheritedProtocols.begin(), 4910 E = RHSInheritedProtocols.end(); I != E; ++I) 4911 if (InheritedProtocolSet.count((*I))) 4912 IntersectionOfProtocols.push_back((*I)); 4913 } 4914} 4915 4916/// areCommonBaseCompatible - Returns common base class of the two classes if 4917/// one found. Note that this is O'2 algorithm. But it will be called as the 4918/// last type comparison in a ?-exp of ObjC pointer types before a 4919/// warning is issued. So, its invokation is extremely rare. 4920QualType ASTContext::areCommonBaseCompatible( 4921 const ObjCObjectPointerType *Lptr, 4922 const ObjCObjectPointerType *Rptr) { 4923 const ObjCObjectType *LHS = Lptr->getObjectType(); 4924 const ObjCObjectType *RHS = Rptr->getObjectType(); 4925 const ObjCInterfaceDecl* LDecl = LHS->getInterface(); 4926 const ObjCInterfaceDecl* RDecl = RHS->getInterface(); 4927 if (!LDecl || !RDecl) 4928 return QualType(); 4929 4930 while ((LDecl = LDecl->getSuperClass())) { 4931 LHS = cast<ObjCInterfaceType>(getObjCInterfaceType(LDecl)); 4932 if (canAssignObjCInterfaces(LHS, RHS)) { 4933 llvm::SmallVector<ObjCProtocolDecl *, 8> Protocols; 4934 getIntersectionOfProtocols(*this, Lptr, Rptr, Protocols); 4935 4936 QualType Result = QualType(LHS, 0); 4937 if (!Protocols.empty()) 4938 Result = getObjCObjectType(Result, Protocols.data(), Protocols.size()); 4939 Result = getObjCObjectPointerType(Result); 4940 return Result; 4941 } 4942 } 4943 4944 return QualType(); 4945} 4946 4947bool ASTContext::canAssignObjCInterfaces(const ObjCObjectType *LHS, 4948 const ObjCObjectType *RHS) { 4949 assert(LHS->getInterface() && "LHS is not an interface type"); 4950 assert(RHS->getInterface() && "RHS is not an interface type"); 4951 4952 // Verify that the base decls are compatible: the RHS must be a subclass of 4953 // the LHS. 4954 if (!LHS->getInterface()->isSuperClassOf(RHS->getInterface())) 4955 return false; 4956 4957 // RHS must have a superset of the protocols in the LHS. If the LHS is not 4958 // protocol qualified at all, then we are good. 4959 if (LHS->getNumProtocols() == 0) 4960 return true; 4961 4962 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, then it 4963 // isn't a superset. 4964 if (RHS->getNumProtocols() == 0) 4965 return true; // FIXME: should return false! 4966 4967 for (ObjCObjectType::qual_iterator LHSPI = LHS->qual_begin(), 4968 LHSPE = LHS->qual_end(); 4969 LHSPI != LHSPE; LHSPI++) { 4970 bool RHSImplementsProtocol = false; 4971 4972 // If the RHS doesn't implement the protocol on the left, the types 4973 // are incompatible. 4974 for (ObjCObjectType::qual_iterator RHSPI = RHS->qual_begin(), 4975 RHSPE = RHS->qual_end(); 4976 RHSPI != RHSPE; RHSPI++) { 4977 if ((*RHSPI)->lookupProtocolNamed((*LHSPI)->getIdentifier())) { 4978 RHSImplementsProtocol = true; 4979 break; 4980 } 4981 } 4982 // FIXME: For better diagnostics, consider passing back the protocol name. 4983 if (!RHSImplementsProtocol) 4984 return false; 4985 } 4986 // The RHS implements all protocols listed on the LHS. 4987 return true; 4988} 4989 4990bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) { 4991 // get the "pointed to" types 4992 const ObjCObjectPointerType *LHSOPT = LHS->getAs<ObjCObjectPointerType>(); 4993 const ObjCObjectPointerType *RHSOPT = RHS->getAs<ObjCObjectPointerType>(); 4994 4995 if (!LHSOPT || !RHSOPT) 4996 return false; 4997 4998 return canAssignObjCInterfaces(LHSOPT, RHSOPT) || 4999 canAssignObjCInterfaces(RHSOPT, LHSOPT); 5000} 5001 5002bool ASTContext::canBindObjCObjectType(QualType To, QualType From) { 5003 return canAssignObjCInterfaces( 5004 getObjCObjectPointerType(To)->getAs<ObjCObjectPointerType>(), 5005 getObjCObjectPointerType(From)->getAs<ObjCObjectPointerType>()); 5006} 5007 5008/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible, 5009/// both shall have the identically qualified version of a compatible type. 5010/// C99 6.2.7p1: Two types have compatible types if their types are the 5011/// same. See 6.7.[2,3,5] for additional rules. 5012bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS, 5013 bool CompareUnqualified) { 5014 if (getLangOptions().CPlusPlus) 5015 return hasSameType(LHS, RHS); 5016 5017 return !mergeTypes(LHS, RHS, false, CompareUnqualified).isNull(); 5018} 5019 5020bool ASTContext::typesAreBlockPointerCompatible(QualType LHS, QualType RHS) { 5021 return !mergeTypes(LHS, RHS, true).isNull(); 5022} 5023 5024/// mergeTransparentUnionType - if T is a transparent union type and a member 5025/// of T is compatible with SubType, return the merged type, else return 5026/// QualType() 5027QualType ASTContext::mergeTransparentUnionType(QualType T, QualType SubType, 5028 bool OfBlockPointer, 5029 bool Unqualified) { 5030 if (const RecordType *UT = T->getAsUnionType()) { 5031 RecordDecl *UD = UT->getDecl(); 5032 if (UD->hasAttr<TransparentUnionAttr>()) { 5033 for (RecordDecl::field_iterator it = UD->field_begin(), 5034 itend = UD->field_end(); it != itend; ++it) { 5035 QualType ET = it->getType().getUnqualifiedType(); 5036 QualType MT = mergeTypes(ET, SubType, OfBlockPointer, Unqualified); 5037 if (!MT.isNull()) 5038 return MT; 5039 } 5040 } 5041 } 5042 5043 return QualType(); 5044} 5045 5046/// mergeFunctionArgumentTypes - merge two types which appear as function 5047/// argument types 5048QualType ASTContext::mergeFunctionArgumentTypes(QualType lhs, QualType rhs, 5049 bool OfBlockPointer, 5050 bool Unqualified) { 5051 // GNU extension: two types are compatible if they appear as a function 5052 // argument, one of the types is a transparent union type and the other 5053 // type is compatible with a union member 5054 QualType lmerge = mergeTransparentUnionType(lhs, rhs, OfBlockPointer, 5055 Unqualified); 5056 if (!lmerge.isNull()) 5057 return lmerge; 5058 5059 QualType rmerge = mergeTransparentUnionType(rhs, lhs, OfBlockPointer, 5060 Unqualified); 5061 if (!rmerge.isNull()) 5062 return rmerge; 5063 5064 return mergeTypes(lhs, rhs, OfBlockPointer, Unqualified); 5065} 5066 5067QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs, 5068 bool OfBlockPointer, 5069 bool Unqualified) { 5070 const FunctionType *lbase = lhs->getAs<FunctionType>(); 5071 const FunctionType *rbase = rhs->getAs<FunctionType>(); 5072 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 5073 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 5074 bool allLTypes = true; 5075 bool allRTypes = true; 5076 5077 // Check return type 5078 QualType retType; 5079 if (OfBlockPointer) { 5080 QualType RHS = rbase->getResultType(); 5081 QualType LHS = lbase->getResultType(); 5082 bool UnqualifiedResult = Unqualified; 5083 if (!UnqualifiedResult) 5084 UnqualifiedResult = (!RHS.hasQualifiers() && LHS.hasQualifiers()); 5085 retType = mergeTypes(RHS, LHS, true, UnqualifiedResult); 5086 } 5087 else 5088 retType = mergeTypes(lbase->getResultType(), rbase->getResultType(), false, 5089 Unqualified); 5090 if (retType.isNull()) return QualType(); 5091 5092 if (Unqualified) 5093 retType = retType.getUnqualifiedType(); 5094 5095 CanQualType LRetType = getCanonicalType(lbase->getResultType()); 5096 CanQualType RRetType = getCanonicalType(rbase->getResultType()); 5097 if (Unqualified) { 5098 LRetType = LRetType.getUnqualifiedType(); 5099 RRetType = RRetType.getUnqualifiedType(); 5100 } 5101 5102 if (getCanonicalType(retType) != LRetType) 5103 allLTypes = false; 5104 if (getCanonicalType(retType) != RRetType) 5105 allRTypes = false; 5106 5107 // FIXME: double check this 5108 // FIXME: should we error if lbase->getRegParmAttr() != 0 && 5109 // rbase->getRegParmAttr() != 0 && 5110 // lbase->getRegParmAttr() != rbase->getRegParmAttr()? 5111 FunctionType::ExtInfo lbaseInfo = lbase->getExtInfo(); 5112 FunctionType::ExtInfo rbaseInfo = rbase->getExtInfo(); 5113 5114 // Compatible functions must have compatible calling conventions 5115 if (!isSameCallConv(lbaseInfo.getCC(), rbaseInfo.getCC())) 5116 return QualType(); 5117 5118 // Regparm is part of the calling convention. 5119 if (lbaseInfo.getRegParm() != rbaseInfo.getRegParm()) 5120 return QualType(); 5121 5122 // It's noreturn if either type is. 5123 // FIXME: some uses, e.g. conditional exprs, really want this to be 'both'. 5124 bool NoReturn = lbaseInfo.getNoReturn() || rbaseInfo.getNoReturn(); 5125 if (NoReturn != lbaseInfo.getNoReturn()) 5126 allLTypes = false; 5127 if (NoReturn != rbaseInfo.getNoReturn()) 5128 allRTypes = false; 5129 5130 FunctionType::ExtInfo einfo(NoReturn, 5131 lbaseInfo.getRegParm(), 5132 lbaseInfo.getCC()); 5133 5134 if (lproto && rproto) { // two C99 style function prototypes 5135 assert(!lproto->hasExceptionSpec() && !rproto->hasExceptionSpec() && 5136 "C++ shouldn't be here"); 5137 unsigned lproto_nargs = lproto->getNumArgs(); 5138 unsigned rproto_nargs = rproto->getNumArgs(); 5139 5140 // Compatible functions must have the same number of arguments 5141 if (lproto_nargs != rproto_nargs) 5142 return QualType(); 5143 5144 // Variadic and non-variadic functions aren't compatible 5145 if (lproto->isVariadic() != rproto->isVariadic()) 5146 return QualType(); 5147 5148 if (lproto->getTypeQuals() != rproto->getTypeQuals()) 5149 return QualType(); 5150 5151 // Check argument compatibility 5152 llvm::SmallVector<QualType, 10> types; 5153 for (unsigned i = 0; i < lproto_nargs; i++) { 5154 QualType largtype = lproto->getArgType(i).getUnqualifiedType(); 5155 QualType rargtype = rproto->getArgType(i).getUnqualifiedType(); 5156 QualType argtype = mergeFunctionArgumentTypes(largtype, rargtype, 5157 OfBlockPointer, 5158 Unqualified); 5159 if (argtype.isNull()) return QualType(); 5160 5161 if (Unqualified) 5162 argtype = argtype.getUnqualifiedType(); 5163 5164 types.push_back(argtype); 5165 if (Unqualified) { 5166 largtype = largtype.getUnqualifiedType(); 5167 rargtype = rargtype.getUnqualifiedType(); 5168 } 5169 5170 if (getCanonicalType(argtype) != getCanonicalType(largtype)) 5171 allLTypes = false; 5172 if (getCanonicalType(argtype) != getCanonicalType(rargtype)) 5173 allRTypes = false; 5174 } 5175 if (allLTypes) return lhs; 5176 if (allRTypes) return rhs; 5177 5178 FunctionProtoType::ExtProtoInfo EPI = lproto->getExtProtoInfo(); 5179 EPI.ExtInfo = einfo; 5180 return getFunctionType(retType, types.begin(), types.size(), EPI); 5181 } 5182 5183 if (lproto) allRTypes = false; 5184 if (rproto) allLTypes = false; 5185 5186 const FunctionProtoType *proto = lproto ? lproto : rproto; 5187 if (proto) { 5188 assert(!proto->hasExceptionSpec() && "C++ shouldn't be here"); 5189 if (proto->isVariadic()) return QualType(); 5190 // Check that the types are compatible with the types that 5191 // would result from default argument promotions (C99 6.7.5.3p15). 5192 // The only types actually affected are promotable integer 5193 // types and floats, which would be passed as a different 5194 // type depending on whether the prototype is visible. 5195 unsigned proto_nargs = proto->getNumArgs(); 5196 for (unsigned i = 0; i < proto_nargs; ++i) { 5197 QualType argTy = proto->getArgType(i); 5198 5199 // Look at the promotion type of enum types, since that is the type used 5200 // to pass enum values. 5201 if (const EnumType *Enum = argTy->getAs<EnumType>()) 5202 argTy = Enum->getDecl()->getPromotionType(); 5203 5204 if (argTy->isPromotableIntegerType() || 5205 getCanonicalType(argTy).getUnqualifiedType() == FloatTy) 5206 return QualType(); 5207 } 5208 5209 if (allLTypes) return lhs; 5210 if (allRTypes) return rhs; 5211 5212 FunctionProtoType::ExtProtoInfo EPI = proto->getExtProtoInfo(); 5213 EPI.ExtInfo = einfo; 5214 return getFunctionType(retType, proto->arg_type_begin(), 5215 proto->getNumArgs(), EPI); 5216 } 5217 5218 if (allLTypes) return lhs; 5219 if (allRTypes) return rhs; 5220 return getFunctionNoProtoType(retType, einfo); 5221} 5222 5223QualType ASTContext::mergeTypes(QualType LHS, QualType RHS, 5224 bool OfBlockPointer, 5225 bool Unqualified) { 5226 // C++ [expr]: If an expression initially has the type "reference to T", the 5227 // type is adjusted to "T" prior to any further analysis, the expression 5228 // designates the object or function denoted by the reference, and the 5229 // expression is an lvalue unless the reference is an rvalue reference and 5230 // the expression is a function call (possibly inside parentheses). 5231 assert(!LHS->getAs<ReferenceType>() && "LHS is a reference type?"); 5232 assert(!RHS->getAs<ReferenceType>() && "RHS is a reference type?"); 5233 5234 if (Unqualified) { 5235 LHS = LHS.getUnqualifiedType(); 5236 RHS = RHS.getUnqualifiedType(); 5237 } 5238 5239 QualType LHSCan = getCanonicalType(LHS), 5240 RHSCan = getCanonicalType(RHS); 5241 5242 // If two types are identical, they are compatible. 5243 if (LHSCan == RHSCan) 5244 return LHS; 5245 5246 // If the qualifiers are different, the types aren't compatible... mostly. 5247 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 5248 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 5249 if (LQuals != RQuals) { 5250 // If any of these qualifiers are different, we have a type 5251 // mismatch. 5252 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 5253 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 5254 return QualType(); 5255 5256 // Exactly one GC qualifier difference is allowed: __strong is 5257 // okay if the other type has no GC qualifier but is an Objective 5258 // C object pointer (i.e. implicitly strong by default). We fix 5259 // this by pretending that the unqualified type was actually 5260 // qualified __strong. 5261 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 5262 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 5263 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 5264 5265 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 5266 return QualType(); 5267 5268 if (GC_L == Qualifiers::Strong && RHSCan->isObjCObjectPointerType()) { 5269 return mergeTypes(LHS, getObjCGCQualType(RHS, Qualifiers::Strong)); 5270 } 5271 if (GC_R == Qualifiers::Strong && LHSCan->isObjCObjectPointerType()) { 5272 return mergeTypes(getObjCGCQualType(LHS, Qualifiers::Strong), RHS); 5273 } 5274 return QualType(); 5275 } 5276 5277 // Okay, qualifiers are equal. 5278 5279 Type::TypeClass LHSClass = LHSCan->getTypeClass(); 5280 Type::TypeClass RHSClass = RHSCan->getTypeClass(); 5281 5282 // We want to consider the two function types to be the same for these 5283 // comparisons, just force one to the other. 5284 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto; 5285 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto; 5286 5287 // Same as above for arrays 5288 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray) 5289 LHSClass = Type::ConstantArray; 5290 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray) 5291 RHSClass = Type::ConstantArray; 5292 5293 // ObjCInterfaces are just specialized ObjCObjects. 5294 if (LHSClass == Type::ObjCInterface) LHSClass = Type::ObjCObject; 5295 if (RHSClass == Type::ObjCInterface) RHSClass = Type::ObjCObject; 5296 5297 // Canonicalize ExtVector -> Vector. 5298 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector; 5299 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector; 5300 5301 // If the canonical type classes don't match. 5302 if (LHSClass != RHSClass) { 5303 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char, 5304 // a signed integer type, or an unsigned integer type. 5305 // Compatibility is based on the underlying type, not the promotion 5306 // type. 5307 if (const EnumType* ETy = LHS->getAs<EnumType>()) { 5308 if (ETy->getDecl()->getIntegerType() == RHSCan.getUnqualifiedType()) 5309 return RHS; 5310 } 5311 if (const EnumType* ETy = RHS->getAs<EnumType>()) { 5312 if (ETy->getDecl()->getIntegerType() == LHSCan.getUnqualifiedType()) 5313 return LHS; 5314 } 5315 5316 return QualType(); 5317 } 5318 5319 // The canonical type classes match. 5320 switch (LHSClass) { 5321#define TYPE(Class, Base) 5322#define ABSTRACT_TYPE(Class, Base) 5323#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) case Type::Class: 5324#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 5325#define DEPENDENT_TYPE(Class, Base) case Type::Class: 5326#include "clang/AST/TypeNodes.def" 5327 assert(false && "Non-canonical and dependent types shouldn't get here"); 5328 return QualType(); 5329 5330 case Type::LValueReference: 5331 case Type::RValueReference: 5332 case Type::MemberPointer: 5333 assert(false && "C++ should never be in mergeTypes"); 5334 return QualType(); 5335 5336 case Type::ObjCInterface: 5337 case Type::IncompleteArray: 5338 case Type::VariableArray: 5339 case Type::FunctionProto: 5340 case Type::ExtVector: 5341 assert(false && "Types are eliminated above"); 5342 return QualType(); 5343 5344 case Type::Pointer: 5345 { 5346 // Merge two pointer types, while trying to preserve typedef info 5347 QualType LHSPointee = LHS->getAs<PointerType>()->getPointeeType(); 5348 QualType RHSPointee = RHS->getAs<PointerType>()->getPointeeType(); 5349 if (Unqualified) { 5350 LHSPointee = LHSPointee.getUnqualifiedType(); 5351 RHSPointee = RHSPointee.getUnqualifiedType(); 5352 } 5353 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, false, 5354 Unqualified); 5355 if (ResultType.isNull()) return QualType(); 5356 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 5357 return LHS; 5358 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 5359 return RHS; 5360 return getPointerType(ResultType); 5361 } 5362 case Type::BlockPointer: 5363 { 5364 // Merge two block pointer types, while trying to preserve typedef info 5365 QualType LHSPointee = LHS->getAs<BlockPointerType>()->getPointeeType(); 5366 QualType RHSPointee = RHS->getAs<BlockPointerType>()->getPointeeType(); 5367 if (Unqualified) { 5368 LHSPointee = LHSPointee.getUnqualifiedType(); 5369 RHSPointee = RHSPointee.getUnqualifiedType(); 5370 } 5371 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, OfBlockPointer, 5372 Unqualified); 5373 if (ResultType.isNull()) return QualType(); 5374 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 5375 return LHS; 5376 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 5377 return RHS; 5378 return getBlockPointerType(ResultType); 5379 } 5380 case Type::ConstantArray: 5381 { 5382 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS); 5383 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS); 5384 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize()) 5385 return QualType(); 5386 5387 QualType LHSElem = getAsArrayType(LHS)->getElementType(); 5388 QualType RHSElem = getAsArrayType(RHS)->getElementType(); 5389 if (Unqualified) { 5390 LHSElem = LHSElem.getUnqualifiedType(); 5391 RHSElem = RHSElem.getUnqualifiedType(); 5392 } 5393 5394 QualType ResultType = mergeTypes(LHSElem, RHSElem, false, Unqualified); 5395 if (ResultType.isNull()) return QualType(); 5396 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 5397 return LHS; 5398 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 5399 return RHS; 5400 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(), 5401 ArrayType::ArraySizeModifier(), 0); 5402 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(), 5403 ArrayType::ArraySizeModifier(), 0); 5404 const VariableArrayType* LVAT = getAsVariableArrayType(LHS); 5405 const VariableArrayType* RVAT = getAsVariableArrayType(RHS); 5406 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 5407 return LHS; 5408 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 5409 return RHS; 5410 if (LVAT) { 5411 // FIXME: This isn't correct! But tricky to implement because 5412 // the array's size has to be the size of LHS, but the type 5413 // has to be different. 5414 return LHS; 5415 } 5416 if (RVAT) { 5417 // FIXME: This isn't correct! But tricky to implement because 5418 // the array's size has to be the size of RHS, but the type 5419 // has to be different. 5420 return RHS; 5421 } 5422 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS; 5423 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS; 5424 return getIncompleteArrayType(ResultType, 5425 ArrayType::ArraySizeModifier(), 0); 5426 } 5427 case Type::FunctionNoProto: 5428 return mergeFunctionTypes(LHS, RHS, OfBlockPointer, Unqualified); 5429 case Type::Record: 5430 case Type::Enum: 5431 return QualType(); 5432 case Type::Builtin: 5433 // Only exactly equal builtin types are compatible, which is tested above. 5434 return QualType(); 5435 case Type::Complex: 5436 // Distinct complex types are incompatible. 5437 return QualType(); 5438 case Type::Vector: 5439 // FIXME: The merged type should be an ExtVector! 5440 if (areCompatVectorTypes(LHSCan->getAs<VectorType>(), 5441 RHSCan->getAs<VectorType>())) 5442 return LHS; 5443 return QualType(); 5444 case Type::ObjCObject: { 5445 // Check if the types are assignment compatible. 5446 // FIXME: This should be type compatibility, e.g. whether 5447 // "LHS x; RHS x;" at global scope is legal. 5448 const ObjCObjectType* LHSIface = LHS->getAs<ObjCObjectType>(); 5449 const ObjCObjectType* RHSIface = RHS->getAs<ObjCObjectType>(); 5450 if (canAssignObjCInterfaces(LHSIface, RHSIface)) 5451 return LHS; 5452 5453 return QualType(); 5454 } 5455 case Type::ObjCObjectPointer: { 5456 if (OfBlockPointer) { 5457 if (canAssignObjCInterfacesInBlockPointer( 5458 LHS->getAs<ObjCObjectPointerType>(), 5459 RHS->getAs<ObjCObjectPointerType>())) 5460 return LHS; 5461 return QualType(); 5462 } 5463 if (canAssignObjCInterfaces(LHS->getAs<ObjCObjectPointerType>(), 5464 RHS->getAs<ObjCObjectPointerType>())) 5465 return LHS; 5466 5467 return QualType(); 5468 } 5469 } 5470 5471 return QualType(); 5472} 5473 5474/// mergeObjCGCQualifiers - This routine merges ObjC's GC attribute of 'LHS' and 5475/// 'RHS' attributes and returns the merged version; including for function 5476/// return types. 5477QualType ASTContext::mergeObjCGCQualifiers(QualType LHS, QualType RHS) { 5478 QualType LHSCan = getCanonicalType(LHS), 5479 RHSCan = getCanonicalType(RHS); 5480 // If two types are identical, they are compatible. 5481 if (LHSCan == RHSCan) 5482 return LHS; 5483 if (RHSCan->isFunctionType()) { 5484 if (!LHSCan->isFunctionType()) 5485 return QualType(); 5486 QualType OldReturnType = 5487 cast<FunctionType>(RHSCan.getTypePtr())->getResultType(); 5488 QualType NewReturnType = 5489 cast<FunctionType>(LHSCan.getTypePtr())->getResultType(); 5490 QualType ResReturnType = 5491 mergeObjCGCQualifiers(NewReturnType, OldReturnType); 5492 if (ResReturnType.isNull()) 5493 return QualType(); 5494 if (ResReturnType == NewReturnType || ResReturnType == OldReturnType) { 5495 // id foo(); ... __strong id foo(); or: __strong id foo(); ... id foo(); 5496 // In either case, use OldReturnType to build the new function type. 5497 const FunctionType *F = LHS->getAs<FunctionType>(); 5498 if (const FunctionProtoType *FPT = cast<FunctionProtoType>(F)) { 5499 FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); 5500 EPI.ExtInfo = getFunctionExtInfo(LHS); 5501 QualType ResultType 5502 = getFunctionType(OldReturnType, FPT->arg_type_begin(), 5503 FPT->getNumArgs(), EPI); 5504 return ResultType; 5505 } 5506 } 5507 return QualType(); 5508 } 5509 5510 // If the qualifiers are different, the types can still be merged. 5511 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 5512 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 5513 if (LQuals != RQuals) { 5514 // If any of these qualifiers are different, we have a type mismatch. 5515 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 5516 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 5517 return QualType(); 5518 5519 // Exactly one GC qualifier difference is allowed: __strong is 5520 // okay if the other type has no GC qualifier but is an Objective 5521 // C object pointer (i.e. implicitly strong by default). We fix 5522 // this by pretending that the unqualified type was actually 5523 // qualified __strong. 5524 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 5525 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 5526 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 5527 5528 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 5529 return QualType(); 5530 5531 if (GC_L == Qualifiers::Strong) 5532 return LHS; 5533 if (GC_R == Qualifiers::Strong) 5534 return RHS; 5535 return QualType(); 5536 } 5537 5538 if (LHSCan->isObjCObjectPointerType() && RHSCan->isObjCObjectPointerType()) { 5539 QualType LHSBaseQT = LHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 5540 QualType RHSBaseQT = RHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 5541 QualType ResQT = mergeObjCGCQualifiers(LHSBaseQT, RHSBaseQT); 5542 if (ResQT == LHSBaseQT) 5543 return LHS; 5544 if (ResQT == RHSBaseQT) 5545 return RHS; 5546 } 5547 return QualType(); 5548} 5549 5550//===----------------------------------------------------------------------===// 5551// Integer Predicates 5552//===----------------------------------------------------------------------===// 5553 5554unsigned ASTContext::getIntWidth(QualType T) const { 5555 if (const EnumType *ET = dyn_cast<EnumType>(T)) 5556 T = ET->getDecl()->getIntegerType(); 5557 if (T->isBooleanType()) 5558 return 1; 5559 // For builtin types, just use the standard type sizing method 5560 return (unsigned)getTypeSize(T); 5561} 5562 5563QualType ASTContext::getCorrespondingUnsignedType(QualType T) { 5564 assert(T->hasSignedIntegerRepresentation() && "Unexpected type"); 5565 5566 // Turn <4 x signed int> -> <4 x unsigned int> 5567 if (const VectorType *VTy = T->getAs<VectorType>()) 5568 return getVectorType(getCorrespondingUnsignedType(VTy->getElementType()), 5569 VTy->getNumElements(), VTy->getVectorKind()); 5570 5571 // For enums, we return the unsigned version of the base type. 5572 if (const EnumType *ETy = T->getAs<EnumType>()) 5573 T = ETy->getDecl()->getIntegerType(); 5574 5575 const BuiltinType *BTy = T->getAs<BuiltinType>(); 5576 assert(BTy && "Unexpected signed integer type"); 5577 switch (BTy->getKind()) { 5578 case BuiltinType::Char_S: 5579 case BuiltinType::SChar: 5580 return UnsignedCharTy; 5581 case BuiltinType::Short: 5582 return UnsignedShortTy; 5583 case BuiltinType::Int: 5584 return UnsignedIntTy; 5585 case BuiltinType::Long: 5586 return UnsignedLongTy; 5587 case BuiltinType::LongLong: 5588 return UnsignedLongLongTy; 5589 case BuiltinType::Int128: 5590 return UnsignedInt128Ty; 5591 default: 5592 assert(0 && "Unexpected signed integer type"); 5593 return QualType(); 5594 } 5595} 5596 5597ExternalASTSource::~ExternalASTSource() { } 5598 5599void ExternalASTSource::PrintStats() { } 5600 5601ASTMutationListener::~ASTMutationListener() { } 5602 5603 5604//===----------------------------------------------------------------------===// 5605// Builtin Type Computation 5606//===----------------------------------------------------------------------===// 5607 5608/// DecodeTypeFromStr - This decodes one type descriptor from Str, advancing the 5609/// pointer over the consumed characters. This returns the resultant type. If 5610/// AllowTypeModifiers is false then modifier like * are not parsed, just basic 5611/// types. This allows "v2i*" to be parsed as a pointer to a v2i instead of 5612/// a vector of "i*". 5613/// 5614/// RequiresICE is filled in on return to indicate whether the value is required 5615/// to be an Integer Constant Expression. 5616static QualType DecodeTypeFromStr(const char *&Str, const ASTContext &Context, 5617 ASTContext::GetBuiltinTypeError &Error, 5618 bool &RequiresICE, 5619 bool AllowTypeModifiers) { 5620 // Modifiers. 5621 int HowLong = 0; 5622 bool Signed = false, Unsigned = false; 5623 RequiresICE = false; 5624 5625 // Read the prefixed modifiers first. 5626 bool Done = false; 5627 while (!Done) { 5628 switch (*Str++) { 5629 default: Done = true; --Str; break; 5630 case 'I': 5631 RequiresICE = true; 5632 break; 5633 case 'S': 5634 assert(!Unsigned && "Can't use both 'S' and 'U' modifiers!"); 5635 assert(!Signed && "Can't use 'S' modifier multiple times!"); 5636 Signed = true; 5637 break; 5638 case 'U': 5639 assert(!Signed && "Can't use both 'S' and 'U' modifiers!"); 5640 assert(!Unsigned && "Can't use 'S' modifier multiple times!"); 5641 Unsigned = true; 5642 break; 5643 case 'L': 5644 assert(HowLong <= 2 && "Can't have LLLL modifier"); 5645 ++HowLong; 5646 break; 5647 } 5648 } 5649 5650 QualType Type; 5651 5652 // Read the base type. 5653 switch (*Str++) { 5654 default: assert(0 && "Unknown builtin type letter!"); 5655 case 'v': 5656 assert(HowLong == 0 && !Signed && !Unsigned && 5657 "Bad modifiers used with 'v'!"); 5658 Type = Context.VoidTy; 5659 break; 5660 case 'f': 5661 assert(HowLong == 0 && !Signed && !Unsigned && 5662 "Bad modifiers used with 'f'!"); 5663 Type = Context.FloatTy; 5664 break; 5665 case 'd': 5666 assert(HowLong < 2 && !Signed && !Unsigned && 5667 "Bad modifiers used with 'd'!"); 5668 if (HowLong) 5669 Type = Context.LongDoubleTy; 5670 else 5671 Type = Context.DoubleTy; 5672 break; 5673 case 's': 5674 assert(HowLong == 0 && "Bad modifiers used with 's'!"); 5675 if (Unsigned) 5676 Type = Context.UnsignedShortTy; 5677 else 5678 Type = Context.ShortTy; 5679 break; 5680 case 'i': 5681 if (HowLong == 3) 5682 Type = Unsigned ? Context.UnsignedInt128Ty : Context.Int128Ty; 5683 else if (HowLong == 2) 5684 Type = Unsigned ? Context.UnsignedLongLongTy : Context.LongLongTy; 5685 else if (HowLong == 1) 5686 Type = Unsigned ? Context.UnsignedLongTy : Context.LongTy; 5687 else 5688 Type = Unsigned ? Context.UnsignedIntTy : Context.IntTy; 5689 break; 5690 case 'c': 5691 assert(HowLong == 0 && "Bad modifiers used with 'c'!"); 5692 if (Signed) 5693 Type = Context.SignedCharTy; 5694 else if (Unsigned) 5695 Type = Context.UnsignedCharTy; 5696 else 5697 Type = Context.CharTy; 5698 break; 5699 case 'b': // boolean 5700 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'b'!"); 5701 Type = Context.BoolTy; 5702 break; 5703 case 'z': // size_t. 5704 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'z'!"); 5705 Type = Context.getSizeType(); 5706 break; 5707 case 'F': 5708 Type = Context.getCFConstantStringType(); 5709 break; 5710 case 'G': 5711 Type = Context.getObjCIdType(); 5712 break; 5713 case 'H': 5714 Type = Context.getObjCSelType(); 5715 break; 5716 case 'a': 5717 Type = Context.getBuiltinVaListType(); 5718 assert(!Type.isNull() && "builtin va list type not initialized!"); 5719 break; 5720 case 'A': 5721 // This is a "reference" to a va_list; however, what exactly 5722 // this means depends on how va_list is defined. There are two 5723 // different kinds of va_list: ones passed by value, and ones 5724 // passed by reference. An example of a by-value va_list is 5725 // x86, where va_list is a char*. An example of by-ref va_list 5726 // is x86-64, where va_list is a __va_list_tag[1]. For x86, 5727 // we want this argument to be a char*&; for x86-64, we want 5728 // it to be a __va_list_tag*. 5729 Type = Context.getBuiltinVaListType(); 5730 assert(!Type.isNull() && "builtin va list type not initialized!"); 5731 if (Type->isArrayType()) 5732 Type = Context.getArrayDecayedType(Type); 5733 else 5734 Type = Context.getLValueReferenceType(Type); 5735 break; 5736 case 'V': { 5737 char *End; 5738 unsigned NumElements = strtoul(Str, &End, 10); 5739 assert(End != Str && "Missing vector size"); 5740 Str = End; 5741 5742 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, 5743 RequiresICE, false); 5744 assert(!RequiresICE && "Can't require vector ICE"); 5745 5746 // TODO: No way to make AltiVec vectors in builtins yet. 5747 Type = Context.getVectorType(ElementType, NumElements, 5748 VectorType::GenericVector); 5749 break; 5750 } 5751 case 'X': { 5752 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, RequiresICE, 5753 false); 5754 assert(!RequiresICE && "Can't require complex ICE"); 5755 Type = Context.getComplexType(ElementType); 5756 break; 5757 } 5758 case 'P': 5759 Type = Context.getFILEType(); 5760 if (Type.isNull()) { 5761 Error = ASTContext::GE_Missing_stdio; 5762 return QualType(); 5763 } 5764 break; 5765 case 'J': 5766 if (Signed) 5767 Type = Context.getsigjmp_bufType(); 5768 else 5769 Type = Context.getjmp_bufType(); 5770 5771 if (Type.isNull()) { 5772 Error = ASTContext::GE_Missing_setjmp; 5773 return QualType(); 5774 } 5775 break; 5776 } 5777 5778 // If there are modifiers and if we're allowed to parse them, go for it. 5779 Done = !AllowTypeModifiers; 5780 while (!Done) { 5781 switch (char c = *Str++) { 5782 default: Done = true; --Str; break; 5783 case '*': 5784 case '&': { 5785 // Both pointers and references can have their pointee types 5786 // qualified with an address space. 5787 char *End; 5788 unsigned AddrSpace = strtoul(Str, &End, 10); 5789 if (End != Str && AddrSpace != 0) { 5790 Type = Context.getAddrSpaceQualType(Type, AddrSpace); 5791 Str = End; 5792 } 5793 if (c == '*') 5794 Type = Context.getPointerType(Type); 5795 else 5796 Type = Context.getLValueReferenceType(Type); 5797 break; 5798 } 5799 // FIXME: There's no way to have a built-in with an rvalue ref arg. 5800 case 'C': 5801 Type = Type.withConst(); 5802 break; 5803 case 'D': 5804 Type = Context.getVolatileType(Type); 5805 break; 5806 } 5807 } 5808 5809 assert((!RequiresICE || Type->isIntegralOrEnumerationType()) && 5810 "Integer constant 'I' type must be an integer"); 5811 5812 return Type; 5813} 5814 5815/// GetBuiltinType - Return the type for the specified builtin. 5816QualType ASTContext::GetBuiltinType(unsigned Id, 5817 GetBuiltinTypeError &Error, 5818 unsigned *IntegerConstantArgs) const { 5819 const char *TypeStr = BuiltinInfo.GetTypeString(Id); 5820 5821 llvm::SmallVector<QualType, 8> ArgTypes; 5822 5823 bool RequiresICE = false; 5824 Error = GE_None; 5825 QualType ResType = DecodeTypeFromStr(TypeStr, *this, Error, 5826 RequiresICE, true); 5827 if (Error != GE_None) 5828 return QualType(); 5829 5830 assert(!RequiresICE && "Result of intrinsic cannot be required to be an ICE"); 5831 5832 while (TypeStr[0] && TypeStr[0] != '.') { 5833 QualType Ty = DecodeTypeFromStr(TypeStr, *this, Error, RequiresICE, true); 5834 if (Error != GE_None) 5835 return QualType(); 5836 5837 // If this argument is required to be an IntegerConstantExpression and the 5838 // caller cares, fill in the bitmask we return. 5839 if (RequiresICE && IntegerConstantArgs) 5840 *IntegerConstantArgs |= 1 << ArgTypes.size(); 5841 5842 // Do array -> pointer decay. The builtin should use the decayed type. 5843 if (Ty->isArrayType()) 5844 Ty = getArrayDecayedType(Ty); 5845 5846 ArgTypes.push_back(Ty); 5847 } 5848 5849 assert((TypeStr[0] != '.' || TypeStr[1] == 0) && 5850 "'.' should only occur at end of builtin type list!"); 5851 5852 FunctionType::ExtInfo EI; 5853 if (BuiltinInfo.isNoReturn(Id)) EI = EI.withNoReturn(true); 5854 5855 bool Variadic = (TypeStr[0] == '.'); 5856 5857 // We really shouldn't be making a no-proto type here, especially in C++. 5858 if (ArgTypes.empty() && Variadic) 5859 return getFunctionNoProtoType(ResType, EI); 5860 5861 FunctionProtoType::ExtProtoInfo EPI; 5862 EPI.ExtInfo = EI; 5863 EPI.Variadic = Variadic; 5864 5865 return getFunctionType(ResType, ArgTypes.data(), ArgTypes.size(), EPI); 5866} 5867 5868GVALinkage ASTContext::GetGVALinkageForFunction(const FunctionDecl *FD) { 5869 GVALinkage External = GVA_StrongExternal; 5870 5871 Linkage L = FD->getLinkage(); 5872 switch (L) { 5873 case NoLinkage: 5874 case InternalLinkage: 5875 case UniqueExternalLinkage: 5876 return GVA_Internal; 5877 5878 case ExternalLinkage: 5879 switch (FD->getTemplateSpecializationKind()) { 5880 case TSK_Undeclared: 5881 case TSK_ExplicitSpecialization: 5882 External = GVA_StrongExternal; 5883 break; 5884 5885 case TSK_ExplicitInstantiationDefinition: 5886 return GVA_ExplicitTemplateInstantiation; 5887 5888 case TSK_ExplicitInstantiationDeclaration: 5889 case TSK_ImplicitInstantiation: 5890 External = GVA_TemplateInstantiation; 5891 break; 5892 } 5893 } 5894 5895 if (!FD->isInlined()) 5896 return External; 5897 5898 if (!getLangOptions().CPlusPlus || FD->hasAttr<GNUInlineAttr>()) { 5899 // GNU or C99 inline semantics. Determine whether this symbol should be 5900 // externally visible. 5901 if (FD->isInlineDefinitionExternallyVisible()) 5902 return External; 5903 5904 // C99 inline semantics, where the symbol is not externally visible. 5905 return GVA_C99Inline; 5906 } 5907 5908 // C++0x [temp.explicit]p9: 5909 // [ Note: The intent is that an inline function that is the subject of 5910 // an explicit instantiation declaration will still be implicitly 5911 // instantiated when used so that the body can be considered for 5912 // inlining, but that no out-of-line copy of the inline function would be 5913 // generated in the translation unit. -- end note ] 5914 if (FD->getTemplateSpecializationKind() 5915 == TSK_ExplicitInstantiationDeclaration) 5916 return GVA_C99Inline; 5917 5918 return GVA_CXXInline; 5919} 5920 5921GVALinkage ASTContext::GetGVALinkageForVariable(const VarDecl *VD) { 5922 // If this is a static data member, compute the kind of template 5923 // specialization. Otherwise, this variable is not part of a 5924 // template. 5925 TemplateSpecializationKind TSK = TSK_Undeclared; 5926 if (VD->isStaticDataMember()) 5927 TSK = VD->getTemplateSpecializationKind(); 5928 5929 Linkage L = VD->getLinkage(); 5930 if (L == ExternalLinkage && getLangOptions().CPlusPlus && 5931 VD->getType()->getLinkage() == UniqueExternalLinkage) 5932 L = UniqueExternalLinkage; 5933 5934 switch (L) { 5935 case NoLinkage: 5936 case InternalLinkage: 5937 case UniqueExternalLinkage: 5938 return GVA_Internal; 5939 5940 case ExternalLinkage: 5941 switch (TSK) { 5942 case TSK_Undeclared: 5943 case TSK_ExplicitSpecialization: 5944 return GVA_StrongExternal; 5945 5946 case TSK_ExplicitInstantiationDeclaration: 5947 llvm_unreachable("Variable should not be instantiated"); 5948 // Fall through to treat this like any other instantiation. 5949 5950 case TSK_ExplicitInstantiationDefinition: 5951 return GVA_ExplicitTemplateInstantiation; 5952 5953 case TSK_ImplicitInstantiation: 5954 return GVA_TemplateInstantiation; 5955 } 5956 } 5957 5958 return GVA_StrongExternal; 5959} 5960 5961bool ASTContext::DeclMustBeEmitted(const Decl *D) { 5962 if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { 5963 if (!VD->isFileVarDecl()) 5964 return false; 5965 } else if (!isa<FunctionDecl>(D)) 5966 return false; 5967 5968 // Weak references don't produce any output by themselves. 5969 if (D->hasAttr<WeakRefAttr>()) 5970 return false; 5971 5972 // Aliases and used decls are required. 5973 if (D->hasAttr<AliasAttr>() || D->hasAttr<UsedAttr>()) 5974 return true; 5975 5976 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 5977 // Forward declarations aren't required. 5978 if (!FD->isThisDeclarationADefinition()) 5979 return false; 5980 5981 // Constructors and destructors are required. 5982 if (FD->hasAttr<ConstructorAttr>() || FD->hasAttr<DestructorAttr>()) 5983 return true; 5984 5985 // The key function for a class is required. 5986 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { 5987 const CXXRecordDecl *RD = MD->getParent(); 5988 if (MD->isOutOfLine() && RD->isDynamicClass()) { 5989 const CXXMethodDecl *KeyFunc = getKeyFunction(RD); 5990 if (KeyFunc && KeyFunc->getCanonicalDecl() == MD->getCanonicalDecl()) 5991 return true; 5992 } 5993 } 5994 5995 GVALinkage Linkage = GetGVALinkageForFunction(FD); 5996 5997 // static, static inline, always_inline, and extern inline functions can 5998 // always be deferred. Normal inline functions can be deferred in C99/C++. 5999 // Implicit template instantiations can also be deferred in C++. 6000 if (Linkage == GVA_Internal || Linkage == GVA_C99Inline || 6001 Linkage == GVA_CXXInline || Linkage == GVA_TemplateInstantiation) 6002 return false; 6003 return true; 6004 } 6005 6006 const VarDecl *VD = cast<VarDecl>(D); 6007 assert(VD->isFileVarDecl() && "Expected file scoped var"); 6008 6009 if (VD->isThisDeclarationADefinition() == VarDecl::DeclarationOnly) 6010 return false; 6011 6012 // Structs that have non-trivial constructors or destructors are required. 6013 6014 // FIXME: Handle references. 6015 if (const RecordType *RT = VD->getType()->getAs<RecordType>()) { 6016 if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(RT->getDecl())) { 6017 if (RD->hasDefinition() && 6018 (!RD->hasTrivialConstructor() || !RD->hasTrivialDestructor())) 6019 return true; 6020 } 6021 } 6022 6023 GVALinkage L = GetGVALinkageForVariable(VD); 6024 if (L == GVA_Internal || L == GVA_TemplateInstantiation) { 6025 if (!(VD->getInit() && VD->getInit()->HasSideEffects(*this))) 6026 return false; 6027 } 6028 6029 return true; 6030} 6031 6032CallingConv ASTContext::getDefaultMethodCallConv() { 6033 // Pass through to the C++ ABI object 6034 return ABI->getDefaultMethodCallConv(); 6035} 6036 6037bool ASTContext::isNearlyEmpty(const CXXRecordDecl *RD) const { 6038 // Pass through to the C++ ABI object 6039 return ABI->isNearlyEmpty(RD); 6040} 6041 6042MangleContext *ASTContext::createMangleContext() { 6043 switch (Target.getCXXABI()) { 6044 case CXXABI_ARM: 6045 case CXXABI_Itanium: 6046 return createItaniumMangleContext(*this, getDiagnostics()); 6047 case CXXABI_Microsoft: 6048 return createMicrosoftMangleContext(*this, getDiagnostics()); 6049 } 6050 assert(0 && "Unsupported ABI"); 6051 return 0; 6052} 6053 6054CXXABI::~CXXABI() {} 6055