ASTContext.cpp revision ffe37fdda5b4b4f162a45155c30d9f60ce110c12
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#include <map> 35 36using namespace clang; 37 38unsigned ASTContext::NumImplicitDefaultConstructors; 39unsigned ASTContext::NumImplicitDefaultConstructorsDeclared; 40unsigned ASTContext::NumImplicitCopyConstructors; 41unsigned ASTContext::NumImplicitCopyConstructorsDeclared; 42unsigned ASTContext::NumImplicitMoveConstructors; 43unsigned ASTContext::NumImplicitMoveConstructorsDeclared; 44unsigned ASTContext::NumImplicitCopyAssignmentOperators; 45unsigned ASTContext::NumImplicitCopyAssignmentOperatorsDeclared; 46unsigned ASTContext::NumImplicitMoveAssignmentOperators; 47unsigned ASTContext::NumImplicitMoveAssignmentOperatorsDeclared; 48unsigned ASTContext::NumImplicitDestructors; 49unsigned ASTContext::NumImplicitDestructorsDeclared; 50 51enum FloatingRank { 52 FloatRank, DoubleRank, LongDoubleRank 53}; 54 55void 56ASTContext::CanonicalTemplateTemplateParm::Profile(llvm::FoldingSetNodeID &ID, 57 TemplateTemplateParmDecl *Parm) { 58 ID.AddInteger(Parm->getDepth()); 59 ID.AddInteger(Parm->getPosition()); 60 ID.AddBoolean(Parm->isParameterPack()); 61 62 TemplateParameterList *Params = Parm->getTemplateParameters(); 63 ID.AddInteger(Params->size()); 64 for (TemplateParameterList::const_iterator P = Params->begin(), 65 PEnd = Params->end(); 66 P != PEnd; ++P) { 67 if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*P)) { 68 ID.AddInteger(0); 69 ID.AddBoolean(TTP->isParameterPack()); 70 continue; 71 } 72 73 if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(*P)) { 74 ID.AddInteger(1); 75 ID.AddBoolean(NTTP->isParameterPack()); 76 ID.AddPointer(NTTP->getType().getAsOpaquePtr()); 77 if (NTTP->isExpandedParameterPack()) { 78 ID.AddBoolean(true); 79 ID.AddInteger(NTTP->getNumExpansionTypes()); 80 for (unsigned I = 0, N = NTTP->getNumExpansionTypes(); I != N; ++I) 81 ID.AddPointer(NTTP->getExpansionType(I).getAsOpaquePtr()); 82 } else 83 ID.AddBoolean(false); 84 continue; 85 } 86 87 TemplateTemplateParmDecl *TTP = cast<TemplateTemplateParmDecl>(*P); 88 ID.AddInteger(2); 89 Profile(ID, TTP); 90 } 91} 92 93TemplateTemplateParmDecl * 94ASTContext::getCanonicalTemplateTemplateParmDecl( 95 TemplateTemplateParmDecl *TTP) const { 96 // Check if we already have a canonical template template parameter. 97 llvm::FoldingSetNodeID ID; 98 CanonicalTemplateTemplateParm::Profile(ID, TTP); 99 void *InsertPos = 0; 100 CanonicalTemplateTemplateParm *Canonical 101 = CanonTemplateTemplateParms.FindNodeOrInsertPos(ID, InsertPos); 102 if (Canonical) 103 return Canonical->getParam(); 104 105 // Build a canonical template parameter list. 106 TemplateParameterList *Params = TTP->getTemplateParameters(); 107 llvm::SmallVector<NamedDecl *, 4> CanonParams; 108 CanonParams.reserve(Params->size()); 109 for (TemplateParameterList::const_iterator P = Params->begin(), 110 PEnd = Params->end(); 111 P != PEnd; ++P) { 112 if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*P)) 113 CanonParams.push_back( 114 TemplateTypeParmDecl::Create(*this, getTranslationUnitDecl(), 115 SourceLocation(), 116 SourceLocation(), 117 TTP->getDepth(), 118 TTP->getIndex(), 0, false, 119 TTP->isParameterPack())); 120 else if (NonTypeTemplateParmDecl *NTTP 121 = dyn_cast<NonTypeTemplateParmDecl>(*P)) { 122 QualType T = getCanonicalType(NTTP->getType()); 123 TypeSourceInfo *TInfo = getTrivialTypeSourceInfo(T); 124 NonTypeTemplateParmDecl *Param; 125 if (NTTP->isExpandedParameterPack()) { 126 llvm::SmallVector<QualType, 2> ExpandedTypes; 127 llvm::SmallVector<TypeSourceInfo *, 2> ExpandedTInfos; 128 for (unsigned I = 0, N = NTTP->getNumExpansionTypes(); I != N; ++I) { 129 ExpandedTypes.push_back(getCanonicalType(NTTP->getExpansionType(I))); 130 ExpandedTInfos.push_back( 131 getTrivialTypeSourceInfo(ExpandedTypes.back())); 132 } 133 134 Param = NonTypeTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 135 SourceLocation(), 136 SourceLocation(), 137 NTTP->getDepth(), 138 NTTP->getPosition(), 0, 139 T, 140 TInfo, 141 ExpandedTypes.data(), 142 ExpandedTypes.size(), 143 ExpandedTInfos.data()); 144 } else { 145 Param = NonTypeTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 146 SourceLocation(), 147 SourceLocation(), 148 NTTP->getDepth(), 149 NTTP->getPosition(), 0, 150 T, 151 NTTP->isParameterPack(), 152 TInfo); 153 } 154 CanonParams.push_back(Param); 155 156 } else 157 CanonParams.push_back(getCanonicalTemplateTemplateParmDecl( 158 cast<TemplateTemplateParmDecl>(*P))); 159 } 160 161 TemplateTemplateParmDecl *CanonTTP 162 = TemplateTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 163 SourceLocation(), TTP->getDepth(), 164 TTP->getPosition(), 165 TTP->isParameterPack(), 166 0, 167 TemplateParameterList::Create(*this, SourceLocation(), 168 SourceLocation(), 169 CanonParams.data(), 170 CanonParams.size(), 171 SourceLocation())); 172 173 // Get the new insert position for the node we care about. 174 Canonical = CanonTemplateTemplateParms.FindNodeOrInsertPos(ID, InsertPos); 175 assert(Canonical == 0 && "Shouldn't be in the map!"); 176 (void)Canonical; 177 178 // Create the canonical template template parameter entry. 179 Canonical = new (*this) CanonicalTemplateTemplateParm(CanonTTP); 180 CanonTemplateTemplateParms.InsertNode(Canonical, InsertPos); 181 return CanonTTP; 182} 183 184CXXABI *ASTContext::createCXXABI(const TargetInfo &T) { 185 if (!LangOpts.CPlusPlus) return 0; 186 187 switch (T.getCXXABI()) { 188 case CXXABI_ARM: 189 return CreateARMCXXABI(*this); 190 case CXXABI_Itanium: 191 return CreateItaniumCXXABI(*this); 192 case CXXABI_Microsoft: 193 return CreateMicrosoftCXXABI(*this); 194 } 195 return 0; 196} 197 198static const LangAS::Map &getAddressSpaceMap(const TargetInfo &T, 199 const LangOptions &LOpts) { 200 if (LOpts.FakeAddressSpaceMap) { 201 // The fake address space map must have a distinct entry for each 202 // language-specific address space. 203 static const unsigned FakeAddrSpaceMap[] = { 204 1, // opencl_global 205 2, // opencl_local 206 3 // opencl_constant 207 }; 208 return FakeAddrSpaceMap; 209 } else { 210 return T.getAddressSpaceMap(); 211 } 212} 213 214ASTContext::ASTContext(const LangOptions& LOpts, SourceManager &SM, 215 const TargetInfo &t, 216 IdentifierTable &idents, SelectorTable &sels, 217 Builtin::Context &builtins, 218 unsigned size_reserve) : 219 FunctionProtoTypes(this_()), 220 TemplateSpecializationTypes(this_()), 221 DependentTemplateSpecializationTypes(this_()), 222 GlobalNestedNameSpecifier(0), IsInt128Installed(false), 223 CFConstantStringTypeDecl(0), NSConstantStringTypeDecl(0), 224 ObjCFastEnumerationStateTypeDecl(0), FILEDecl(0), jmp_bufDecl(0), 225 sigjmp_bufDecl(0), BlockDescriptorType(0), BlockDescriptorExtendedType(0), 226 cudaConfigureCallDecl(0), 227 NullTypeSourceInfo(QualType()), 228 SourceMgr(SM), LangOpts(LOpts), ABI(createCXXABI(t)), 229 AddrSpaceMap(getAddressSpaceMap(t, LOpts)), Target(t), 230 Idents(idents), Selectors(sels), 231 BuiltinInfo(builtins), 232 DeclarationNames(*this), 233 ExternalSource(0), Listener(0), PrintingPolicy(LOpts), 234 LastSDM(0, 0), 235 UniqueBlockByRefTypeID(0) { 236 ObjCIdRedefinitionType = QualType(); 237 ObjCClassRedefinitionType = QualType(); 238 ObjCSelRedefinitionType = QualType(); 239 if (size_reserve > 0) Types.reserve(size_reserve); 240 TUDecl = TranslationUnitDecl::Create(*this); 241 InitBuiltinTypes(); 242} 243 244ASTContext::~ASTContext() { 245 // Release the DenseMaps associated with DeclContext objects. 246 // FIXME: Is this the ideal solution? 247 ReleaseDeclContextMaps(); 248 249 // Call all of the deallocation functions. 250 for (unsigned I = 0, N = Deallocations.size(); I != N; ++I) 251 Deallocations[I].first(Deallocations[I].second); 252 253 // Release all of the memory associated with overridden C++ methods. 254 for (llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::iterator 255 OM = OverriddenMethods.begin(), OMEnd = OverriddenMethods.end(); 256 OM != OMEnd; ++OM) 257 OM->second.Destroy(); 258 259 // ASTRecordLayout objects in ASTRecordLayouts must always be destroyed 260 // because they can contain DenseMaps. 261 for (llvm::DenseMap<const ObjCContainerDecl*, 262 const ASTRecordLayout*>::iterator 263 I = ObjCLayouts.begin(), E = ObjCLayouts.end(); I != E; ) 264 // Increment in loop to prevent using deallocated memory. 265 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 266 R->Destroy(*this); 267 268 for (llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*>::iterator 269 I = ASTRecordLayouts.begin(), E = ASTRecordLayouts.end(); I != E; ) { 270 // Increment in loop to prevent using deallocated memory. 271 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 272 R->Destroy(*this); 273 } 274 275 for (llvm::DenseMap<const Decl*, AttrVec*>::iterator A = DeclAttrs.begin(), 276 AEnd = DeclAttrs.end(); 277 A != AEnd; ++A) 278 A->second->~AttrVec(); 279} 280 281void ASTContext::AddDeallocation(void (*Callback)(void*), void *Data) { 282 Deallocations.push_back(std::make_pair(Callback, Data)); 283} 284 285void 286ASTContext::setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source) { 287 ExternalSource.reset(Source.take()); 288} 289 290void ASTContext::PrintStats() const { 291 fprintf(stderr, "*** AST Context Stats:\n"); 292 fprintf(stderr, " %d types total.\n", (int)Types.size()); 293 294 unsigned counts[] = { 295#define TYPE(Name, Parent) 0, 296#define ABSTRACT_TYPE(Name, Parent) 297#include "clang/AST/TypeNodes.def" 298 0 // Extra 299 }; 300 301 for (unsigned i = 0, e = Types.size(); i != e; ++i) { 302 Type *T = Types[i]; 303 counts[(unsigned)T->getTypeClass()]++; 304 } 305 306 unsigned Idx = 0; 307 unsigned TotalBytes = 0; 308#define TYPE(Name, Parent) \ 309 if (counts[Idx]) \ 310 fprintf(stderr, " %d %s types\n", (int)counts[Idx], #Name); \ 311 TotalBytes += counts[Idx] * sizeof(Name##Type); \ 312 ++Idx; 313#define ABSTRACT_TYPE(Name, Parent) 314#include "clang/AST/TypeNodes.def" 315 316 fprintf(stderr, "Total bytes = %d\n", int(TotalBytes)); 317 318 // Implicit special member functions. 319 fprintf(stderr, " %u/%u implicit default constructors created\n", 320 NumImplicitDefaultConstructorsDeclared, 321 NumImplicitDefaultConstructors); 322 fprintf(stderr, " %u/%u implicit copy constructors created\n", 323 NumImplicitCopyConstructorsDeclared, 324 NumImplicitCopyConstructors); 325 if (getLangOptions().CPlusPlus) 326 fprintf(stderr, " %u/%u implicit move constructors created\n", 327 NumImplicitMoveConstructorsDeclared, 328 NumImplicitMoveConstructors); 329 fprintf(stderr, " %u/%u implicit copy assignment operators created\n", 330 NumImplicitCopyAssignmentOperatorsDeclared, 331 NumImplicitCopyAssignmentOperators); 332 if (getLangOptions().CPlusPlus) 333 fprintf(stderr, " %u/%u implicit move assignment operators created\n", 334 NumImplicitMoveAssignmentOperatorsDeclared, 335 NumImplicitMoveAssignmentOperators); 336 fprintf(stderr, " %u/%u implicit destructors created\n", 337 NumImplicitDestructorsDeclared, NumImplicitDestructors); 338 339 if (ExternalSource.get()) { 340 fprintf(stderr, "\n"); 341 ExternalSource->PrintStats(); 342 } 343 344 BumpAlloc.PrintStats(); 345} 346 347 348void ASTContext::InitBuiltinType(CanQualType &R, BuiltinType::Kind K) { 349 BuiltinType *Ty = new (*this, TypeAlignment) BuiltinType(K); 350 R = CanQualType::CreateUnsafe(QualType(Ty, 0)); 351 Types.push_back(Ty); 352} 353 354void ASTContext::InitBuiltinTypes() { 355 assert(VoidTy.isNull() && "Context reinitialized?"); 356 357 // C99 6.2.5p19. 358 InitBuiltinType(VoidTy, BuiltinType::Void); 359 360 // C99 6.2.5p2. 361 InitBuiltinType(BoolTy, BuiltinType::Bool); 362 // C99 6.2.5p3. 363 if (LangOpts.CharIsSigned) 364 InitBuiltinType(CharTy, BuiltinType::Char_S); 365 else 366 InitBuiltinType(CharTy, BuiltinType::Char_U); 367 // C99 6.2.5p4. 368 InitBuiltinType(SignedCharTy, BuiltinType::SChar); 369 InitBuiltinType(ShortTy, BuiltinType::Short); 370 InitBuiltinType(IntTy, BuiltinType::Int); 371 InitBuiltinType(LongTy, BuiltinType::Long); 372 InitBuiltinType(LongLongTy, BuiltinType::LongLong); 373 374 // C99 6.2.5p6. 375 InitBuiltinType(UnsignedCharTy, BuiltinType::UChar); 376 InitBuiltinType(UnsignedShortTy, BuiltinType::UShort); 377 InitBuiltinType(UnsignedIntTy, BuiltinType::UInt); 378 InitBuiltinType(UnsignedLongTy, BuiltinType::ULong); 379 InitBuiltinType(UnsignedLongLongTy, BuiltinType::ULongLong); 380 381 // C99 6.2.5p10. 382 InitBuiltinType(FloatTy, BuiltinType::Float); 383 InitBuiltinType(DoubleTy, BuiltinType::Double); 384 InitBuiltinType(LongDoubleTy, BuiltinType::LongDouble); 385 386 // GNU extension, 128-bit integers. 387 InitBuiltinType(Int128Ty, BuiltinType::Int128); 388 InitBuiltinType(UnsignedInt128Ty, BuiltinType::UInt128); 389 390 if (LangOpts.CPlusPlus) { // C++ 3.9.1p5 391 if (TargetInfo::isTypeSigned(Target.getWCharType())) 392 InitBuiltinType(WCharTy, BuiltinType::WChar_S); 393 else // -fshort-wchar makes wchar_t be unsigned. 394 InitBuiltinType(WCharTy, BuiltinType::WChar_U); 395 } else // C99 396 WCharTy = getFromTargetType(Target.getWCharType()); 397 398 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 399 InitBuiltinType(Char16Ty, BuiltinType::Char16); 400 else // C99 401 Char16Ty = getFromTargetType(Target.getChar16Type()); 402 403 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 404 InitBuiltinType(Char32Ty, BuiltinType::Char32); 405 else // C99 406 Char32Ty = getFromTargetType(Target.getChar32Type()); 407 408 // Placeholder type for type-dependent expressions whose type is 409 // completely unknown. No code should ever check a type against 410 // DependentTy and users should never see it; however, it is here to 411 // help diagnose failures to properly check for type-dependent 412 // expressions. 413 InitBuiltinType(DependentTy, BuiltinType::Dependent); 414 415 // Placeholder type for functions. 416 InitBuiltinType(OverloadTy, BuiltinType::Overload); 417 418 // Placeholder type for bound members. 419 InitBuiltinType(BoundMemberTy, BuiltinType::BoundMember); 420 421 // "any" type; useful for debugger-like clients. 422 InitBuiltinType(UnknownAnyTy, BuiltinType::UnknownAny); 423 424 // C99 6.2.5p11. 425 FloatComplexTy = getComplexType(FloatTy); 426 DoubleComplexTy = getComplexType(DoubleTy); 427 LongDoubleComplexTy = getComplexType(LongDoubleTy); 428 429 BuiltinVaListType = QualType(); 430 431 // "Builtin" typedefs set by Sema::ActOnTranslationUnitScope(). 432 ObjCIdTypedefType = QualType(); 433 ObjCClassTypedefType = QualType(); 434 ObjCSelTypedefType = QualType(); 435 436 // Builtin types for 'id', 'Class', and 'SEL'. 437 InitBuiltinType(ObjCBuiltinIdTy, BuiltinType::ObjCId); 438 InitBuiltinType(ObjCBuiltinClassTy, BuiltinType::ObjCClass); 439 InitBuiltinType(ObjCBuiltinSelTy, BuiltinType::ObjCSel); 440 441 ObjCConstantStringType = QualType(); 442 443 // void * type 444 VoidPtrTy = getPointerType(VoidTy); 445 446 // nullptr type (C++0x 2.14.7) 447 InitBuiltinType(NullPtrTy, BuiltinType::NullPtr); 448} 449 450Diagnostic &ASTContext::getDiagnostics() const { 451 return SourceMgr.getDiagnostics(); 452} 453 454AttrVec& ASTContext::getDeclAttrs(const Decl *D) { 455 AttrVec *&Result = DeclAttrs[D]; 456 if (!Result) { 457 void *Mem = Allocate(sizeof(AttrVec)); 458 Result = new (Mem) AttrVec; 459 } 460 461 return *Result; 462} 463 464/// \brief Erase the attributes corresponding to the given declaration. 465void ASTContext::eraseDeclAttrs(const Decl *D) { 466 llvm::DenseMap<const Decl*, AttrVec*>::iterator Pos = DeclAttrs.find(D); 467 if (Pos != DeclAttrs.end()) { 468 Pos->second->~AttrVec(); 469 DeclAttrs.erase(Pos); 470 } 471} 472 473MemberSpecializationInfo * 474ASTContext::getInstantiatedFromStaticDataMember(const VarDecl *Var) { 475 assert(Var->isStaticDataMember() && "Not a static data member"); 476 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *>::iterator Pos 477 = InstantiatedFromStaticDataMember.find(Var); 478 if (Pos == InstantiatedFromStaticDataMember.end()) 479 return 0; 480 481 return Pos->second; 482} 483 484void 485ASTContext::setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 486 TemplateSpecializationKind TSK, 487 SourceLocation PointOfInstantiation) { 488 assert(Inst->isStaticDataMember() && "Not a static data member"); 489 assert(Tmpl->isStaticDataMember() && "Not a static data member"); 490 assert(!InstantiatedFromStaticDataMember[Inst] && 491 "Already noted what static data member was instantiated from"); 492 InstantiatedFromStaticDataMember[Inst] 493 = new (*this) MemberSpecializationInfo(Tmpl, TSK, PointOfInstantiation); 494} 495 496NamedDecl * 497ASTContext::getInstantiatedFromUsingDecl(UsingDecl *UUD) { 498 llvm::DenseMap<UsingDecl *, NamedDecl *>::const_iterator Pos 499 = InstantiatedFromUsingDecl.find(UUD); 500 if (Pos == InstantiatedFromUsingDecl.end()) 501 return 0; 502 503 return Pos->second; 504} 505 506void 507ASTContext::setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern) { 508 assert((isa<UsingDecl>(Pattern) || 509 isa<UnresolvedUsingValueDecl>(Pattern) || 510 isa<UnresolvedUsingTypenameDecl>(Pattern)) && 511 "pattern decl is not a using decl"); 512 assert(!InstantiatedFromUsingDecl[Inst] && "pattern already exists"); 513 InstantiatedFromUsingDecl[Inst] = Pattern; 514} 515 516UsingShadowDecl * 517ASTContext::getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst) { 518 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*>::const_iterator Pos 519 = InstantiatedFromUsingShadowDecl.find(Inst); 520 if (Pos == InstantiatedFromUsingShadowDecl.end()) 521 return 0; 522 523 return Pos->second; 524} 525 526void 527ASTContext::setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 528 UsingShadowDecl *Pattern) { 529 assert(!InstantiatedFromUsingShadowDecl[Inst] && "pattern already exists"); 530 InstantiatedFromUsingShadowDecl[Inst] = Pattern; 531} 532 533FieldDecl *ASTContext::getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field) { 534 llvm::DenseMap<FieldDecl *, FieldDecl *>::iterator Pos 535 = InstantiatedFromUnnamedFieldDecl.find(Field); 536 if (Pos == InstantiatedFromUnnamedFieldDecl.end()) 537 return 0; 538 539 return Pos->second; 540} 541 542void ASTContext::setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, 543 FieldDecl *Tmpl) { 544 assert(!Inst->getDeclName() && "Instantiated field decl is not unnamed"); 545 assert(!Tmpl->getDeclName() && "Template field decl is not unnamed"); 546 assert(!InstantiatedFromUnnamedFieldDecl[Inst] && 547 "Already noted what unnamed field was instantiated from"); 548 549 InstantiatedFromUnnamedFieldDecl[Inst] = Tmpl; 550} 551 552bool ASTContext::ZeroBitfieldFollowsNonBitfield(const FieldDecl *FD, 553 const FieldDecl *LastFD) const { 554 return (FD->isBitField() && LastFD && !LastFD->isBitField() && 555 FD->getBitWidth()-> EvaluateAsInt(*this).getZExtValue() == 0); 556 557} 558 559bool ASTContext::ZeroBitfieldFollowsBitfield(const FieldDecl *FD, 560 const FieldDecl *LastFD) const { 561 return (FD->isBitField() && LastFD && LastFD->isBitField() && 562 FD->getBitWidth()-> EvaluateAsInt(*this).getZExtValue() == 0 && 563 LastFD->getBitWidth()-> EvaluateAsInt(*this).getZExtValue() != 0); 564 565} 566 567bool ASTContext::BitfieldFollowsBitfield(const FieldDecl *FD, 568 const FieldDecl *LastFD) const { 569 return (FD->isBitField() && LastFD && LastFD->isBitField() && 570 FD->getBitWidth()-> EvaluateAsInt(*this).getZExtValue() && 571 LastFD->getBitWidth()-> EvaluateAsInt(*this).getZExtValue()); 572} 573 574bool ASTContext::NoneBitfieldFollowsBitfield(const FieldDecl *FD, 575 const FieldDecl *LastFD) const { 576 return (!FD->isBitField() && LastFD && LastFD->isBitField() && 577 LastFD->getBitWidth()-> EvaluateAsInt(*this).getZExtValue()); 578} 579 580bool ASTContext::BitfieldFollowsNoneBitfield(const FieldDecl *FD, 581 const FieldDecl *LastFD) const { 582 return (FD->isBitField() && LastFD && !LastFD->isBitField() && 583 FD->getBitWidth()-> EvaluateAsInt(*this).getZExtValue()); 584} 585 586ASTContext::overridden_cxx_method_iterator 587ASTContext::overridden_methods_begin(const CXXMethodDecl *Method) const { 588 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 589 = OverriddenMethods.find(Method); 590 if (Pos == OverriddenMethods.end()) 591 return 0; 592 593 return Pos->second.begin(); 594} 595 596ASTContext::overridden_cxx_method_iterator 597ASTContext::overridden_methods_end(const CXXMethodDecl *Method) const { 598 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 599 = OverriddenMethods.find(Method); 600 if (Pos == OverriddenMethods.end()) 601 return 0; 602 603 return Pos->second.end(); 604} 605 606unsigned 607ASTContext::overridden_methods_size(const CXXMethodDecl *Method) const { 608 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 609 = OverriddenMethods.find(Method); 610 if (Pos == OverriddenMethods.end()) 611 return 0; 612 613 return Pos->second.size(); 614} 615 616void ASTContext::addOverriddenMethod(const CXXMethodDecl *Method, 617 const CXXMethodDecl *Overridden) { 618 OverriddenMethods[Method].push_back(Overridden); 619} 620 621//===----------------------------------------------------------------------===// 622// Type Sizing and Analysis 623//===----------------------------------------------------------------------===// 624 625/// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 626/// scalar floating point type. 627const llvm::fltSemantics &ASTContext::getFloatTypeSemantics(QualType T) const { 628 const BuiltinType *BT = T->getAs<BuiltinType>(); 629 assert(BT && "Not a floating point type!"); 630 switch (BT->getKind()) { 631 default: assert(0 && "Not a floating point type!"); 632 case BuiltinType::Float: return Target.getFloatFormat(); 633 case BuiltinType::Double: return Target.getDoubleFormat(); 634 case BuiltinType::LongDouble: return Target.getLongDoubleFormat(); 635 } 636} 637 638/// getDeclAlign - Return a conservative estimate of the alignment of the 639/// specified decl. Note that bitfields do not have a valid alignment, so 640/// this method will assert on them. 641/// If @p RefAsPointee, references are treated like their underlying type 642/// (for alignof), else they're treated like pointers (for CodeGen). 643CharUnits ASTContext::getDeclAlign(const Decl *D, bool RefAsPointee) const { 644 unsigned Align = Target.getCharWidth(); 645 646 bool UseAlignAttrOnly = false; 647 if (unsigned AlignFromAttr = D->getMaxAlignment()) { 648 Align = AlignFromAttr; 649 650 // __attribute__((aligned)) can increase or decrease alignment 651 // *except* on a struct or struct member, where it only increases 652 // alignment unless 'packed' is also specified. 653 // 654 // It is an error for [[align]] to decrease alignment, so we can 655 // ignore that possibility; Sema should diagnose it. 656 if (isa<FieldDecl>(D)) { 657 UseAlignAttrOnly = D->hasAttr<PackedAttr>() || 658 cast<FieldDecl>(D)->getParent()->hasAttr<PackedAttr>(); 659 } else { 660 UseAlignAttrOnly = true; 661 } 662 } 663 else if (isa<FieldDecl>(D)) 664 UseAlignAttrOnly = 665 D->hasAttr<PackedAttr>() || 666 cast<FieldDecl>(D)->getParent()->hasAttr<PackedAttr>(); 667 668 // If we're using the align attribute only, just ignore everything 669 // else about the declaration and its type. 670 if (UseAlignAttrOnly) { 671 // do nothing 672 673 } else if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) { 674 QualType T = VD->getType(); 675 if (const ReferenceType* RT = T->getAs<ReferenceType>()) { 676 if (RefAsPointee) 677 T = RT->getPointeeType(); 678 else 679 T = getPointerType(RT->getPointeeType()); 680 } 681 if (!T->isIncompleteType() && !T->isFunctionType()) { 682 // Adjust alignments of declarations with array type by the 683 // large-array alignment on the target. 684 unsigned MinWidth = Target.getLargeArrayMinWidth(); 685 const ArrayType *arrayType; 686 if (MinWidth && (arrayType = getAsArrayType(T))) { 687 if (isa<VariableArrayType>(arrayType)) 688 Align = std::max(Align, Target.getLargeArrayAlign()); 689 else if (isa<ConstantArrayType>(arrayType) && 690 MinWidth <= getTypeSize(cast<ConstantArrayType>(arrayType))) 691 Align = std::max(Align, Target.getLargeArrayAlign()); 692 693 // Walk through any array types while we're at it. 694 T = getBaseElementType(arrayType); 695 } 696 Align = std::max(Align, getPreferredTypeAlign(T.getTypePtr())); 697 } 698 699 // Fields can be subject to extra alignment constraints, like if 700 // the field is packed, the struct is packed, or the struct has a 701 // a max-field-alignment constraint (#pragma pack). So calculate 702 // the actual alignment of the field within the struct, and then 703 // (as we're expected to) constrain that by the alignment of the type. 704 if (const FieldDecl *field = dyn_cast<FieldDecl>(VD)) { 705 // So calculate the alignment of the field. 706 const ASTRecordLayout &layout = getASTRecordLayout(field->getParent()); 707 708 // Start with the record's overall alignment. 709 unsigned fieldAlign = toBits(layout.getAlignment()); 710 711 // Use the GCD of that and the offset within the record. 712 uint64_t offset = layout.getFieldOffset(field->getFieldIndex()); 713 if (offset > 0) { 714 // Alignment is always a power of 2, so the GCD will be a power of 2, 715 // which means we get to do this crazy thing instead of Euclid's. 716 uint64_t lowBitOfOffset = offset & (~offset + 1); 717 if (lowBitOfOffset < fieldAlign) 718 fieldAlign = static_cast<unsigned>(lowBitOfOffset); 719 } 720 721 Align = std::min(Align, fieldAlign); 722 } 723 } 724 725 return toCharUnitsFromBits(Align); 726} 727 728std::pair<CharUnits, CharUnits> 729ASTContext::getTypeInfoInChars(const Type *T) const { 730 std::pair<uint64_t, unsigned> Info = getTypeInfo(T); 731 return std::make_pair(toCharUnitsFromBits(Info.first), 732 toCharUnitsFromBits(Info.second)); 733} 734 735std::pair<CharUnits, CharUnits> 736ASTContext::getTypeInfoInChars(QualType T) const { 737 return getTypeInfoInChars(T.getTypePtr()); 738} 739 740/// getTypeSize - Return the size of the specified type, in bits. This method 741/// does not work on incomplete types. 742/// 743/// FIXME: Pointers into different addr spaces could have different sizes and 744/// alignment requirements: getPointerInfo should take an AddrSpace, this 745/// should take a QualType, &c. 746std::pair<uint64_t, unsigned> 747ASTContext::getTypeInfo(const Type *T) const { 748 uint64_t Width=0; 749 unsigned Align=8; 750 switch (T->getTypeClass()) { 751#define TYPE(Class, Base) 752#define ABSTRACT_TYPE(Class, Base) 753#define NON_CANONICAL_TYPE(Class, Base) 754#define DEPENDENT_TYPE(Class, Base) case Type::Class: 755#include "clang/AST/TypeNodes.def" 756 assert(false && "Should not see dependent types"); 757 break; 758 759 case Type::FunctionNoProto: 760 case Type::FunctionProto: 761 // GCC extension: alignof(function) = 32 bits 762 Width = 0; 763 Align = 32; 764 break; 765 766 case Type::IncompleteArray: 767 case Type::VariableArray: 768 Width = 0; 769 Align = getTypeAlign(cast<ArrayType>(T)->getElementType()); 770 break; 771 772 case Type::ConstantArray: { 773 const ConstantArrayType *CAT = cast<ConstantArrayType>(T); 774 775 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(CAT->getElementType()); 776 Width = EltInfo.first*CAT->getSize().getZExtValue(); 777 Align = EltInfo.second; 778 Width = llvm::RoundUpToAlignment(Width, Align); 779 break; 780 } 781 case Type::ExtVector: 782 case Type::Vector: { 783 const VectorType *VT = cast<VectorType>(T); 784 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(VT->getElementType()); 785 Width = EltInfo.first*VT->getNumElements(); 786 Align = Width; 787 // If the alignment is not a power of 2, round up to the next power of 2. 788 // This happens for non-power-of-2 length vectors. 789 if (Align & (Align-1)) { 790 Align = llvm::NextPowerOf2(Align); 791 Width = llvm::RoundUpToAlignment(Width, Align); 792 } 793 break; 794 } 795 796 case Type::Builtin: 797 switch (cast<BuiltinType>(T)->getKind()) { 798 default: assert(0 && "Unknown builtin type!"); 799 case BuiltinType::Void: 800 // GCC extension: alignof(void) = 8 bits. 801 Width = 0; 802 Align = 8; 803 break; 804 805 case BuiltinType::Bool: 806 Width = Target.getBoolWidth(); 807 Align = Target.getBoolAlign(); 808 break; 809 case BuiltinType::Char_S: 810 case BuiltinType::Char_U: 811 case BuiltinType::UChar: 812 case BuiltinType::SChar: 813 Width = Target.getCharWidth(); 814 Align = Target.getCharAlign(); 815 break; 816 case BuiltinType::WChar_S: 817 case BuiltinType::WChar_U: 818 Width = Target.getWCharWidth(); 819 Align = Target.getWCharAlign(); 820 break; 821 case BuiltinType::Char16: 822 Width = Target.getChar16Width(); 823 Align = Target.getChar16Align(); 824 break; 825 case BuiltinType::Char32: 826 Width = Target.getChar32Width(); 827 Align = Target.getChar32Align(); 828 break; 829 case BuiltinType::UShort: 830 case BuiltinType::Short: 831 Width = Target.getShortWidth(); 832 Align = Target.getShortAlign(); 833 break; 834 case BuiltinType::UInt: 835 case BuiltinType::Int: 836 Width = Target.getIntWidth(); 837 Align = Target.getIntAlign(); 838 break; 839 case BuiltinType::ULong: 840 case BuiltinType::Long: 841 Width = Target.getLongWidth(); 842 Align = Target.getLongAlign(); 843 break; 844 case BuiltinType::ULongLong: 845 case BuiltinType::LongLong: 846 Width = Target.getLongLongWidth(); 847 Align = Target.getLongLongAlign(); 848 break; 849 case BuiltinType::Int128: 850 case BuiltinType::UInt128: 851 Width = 128; 852 Align = 128; // int128_t is 128-bit aligned on all targets. 853 break; 854 case BuiltinType::Float: 855 Width = Target.getFloatWidth(); 856 Align = Target.getFloatAlign(); 857 break; 858 case BuiltinType::Double: 859 Width = Target.getDoubleWidth(); 860 Align = Target.getDoubleAlign(); 861 break; 862 case BuiltinType::LongDouble: 863 Width = Target.getLongDoubleWidth(); 864 Align = Target.getLongDoubleAlign(); 865 break; 866 case BuiltinType::NullPtr: 867 Width = Target.getPointerWidth(0); // C++ 3.9.1p11: sizeof(nullptr_t) 868 Align = Target.getPointerAlign(0); // == sizeof(void*) 869 break; 870 case BuiltinType::ObjCId: 871 case BuiltinType::ObjCClass: 872 case BuiltinType::ObjCSel: 873 Width = Target.getPointerWidth(0); 874 Align = Target.getPointerAlign(0); 875 break; 876 } 877 break; 878 case Type::ObjCObjectPointer: 879 Width = Target.getPointerWidth(0); 880 Align = Target.getPointerAlign(0); 881 break; 882 case Type::BlockPointer: { 883 unsigned AS = getTargetAddressSpace( 884 cast<BlockPointerType>(T)->getPointeeType()); 885 Width = Target.getPointerWidth(AS); 886 Align = Target.getPointerAlign(AS); 887 break; 888 } 889 case Type::LValueReference: 890 case Type::RValueReference: { 891 // alignof and sizeof should never enter this code path here, so we go 892 // the pointer route. 893 unsigned AS = getTargetAddressSpace( 894 cast<ReferenceType>(T)->getPointeeType()); 895 Width = Target.getPointerWidth(AS); 896 Align = Target.getPointerAlign(AS); 897 break; 898 } 899 case Type::Pointer: { 900 unsigned AS = getTargetAddressSpace(cast<PointerType>(T)->getPointeeType()); 901 Width = Target.getPointerWidth(AS); 902 Align = Target.getPointerAlign(AS); 903 break; 904 } 905 case Type::MemberPointer: { 906 const MemberPointerType *MPT = cast<MemberPointerType>(T); 907 std::pair<uint64_t, unsigned> PtrDiffInfo = 908 getTypeInfo(getPointerDiffType()); 909 Width = PtrDiffInfo.first * ABI->getMemberPointerSize(MPT); 910 Align = PtrDiffInfo.second; 911 break; 912 } 913 case Type::Complex: { 914 // Complex types have the same alignment as their elements, but twice the 915 // size. 916 std::pair<uint64_t, unsigned> EltInfo = 917 getTypeInfo(cast<ComplexType>(T)->getElementType()); 918 Width = EltInfo.first*2; 919 Align = EltInfo.second; 920 break; 921 } 922 case Type::ObjCObject: 923 return getTypeInfo(cast<ObjCObjectType>(T)->getBaseType().getTypePtr()); 924 case Type::ObjCInterface: { 925 const ObjCInterfaceType *ObjCI = cast<ObjCInterfaceType>(T); 926 const ASTRecordLayout &Layout = getASTObjCInterfaceLayout(ObjCI->getDecl()); 927 Width = toBits(Layout.getSize()); 928 Align = toBits(Layout.getAlignment()); 929 break; 930 } 931 case Type::Record: 932 case Type::Enum: { 933 const TagType *TT = cast<TagType>(T); 934 935 if (TT->getDecl()->isInvalidDecl()) { 936 Width = 8; 937 Align = 8; 938 break; 939 } 940 941 if (const EnumType *ET = dyn_cast<EnumType>(TT)) 942 return getTypeInfo(ET->getDecl()->getIntegerType()); 943 944 const RecordType *RT = cast<RecordType>(TT); 945 const ASTRecordLayout &Layout = getASTRecordLayout(RT->getDecl()); 946 Width = toBits(Layout.getSize()); 947 Align = toBits(Layout.getAlignment()); 948 break; 949 } 950 951 case Type::SubstTemplateTypeParm: 952 return getTypeInfo(cast<SubstTemplateTypeParmType>(T)-> 953 getReplacementType().getTypePtr()); 954 955 case Type::Auto: { 956 const AutoType *A = cast<AutoType>(T); 957 assert(A->isDeduced() && "Cannot request the size of a dependent type"); 958 return getTypeInfo(A->getDeducedType().getTypePtr()); 959 } 960 961 case Type::Paren: 962 return getTypeInfo(cast<ParenType>(T)->getInnerType().getTypePtr()); 963 964 case Type::Typedef: { 965 const TypedefNameDecl *Typedef = cast<TypedefType>(T)->getDecl(); 966 std::pair<uint64_t, unsigned> Info 967 = getTypeInfo(Typedef->getUnderlyingType().getTypePtr()); 968 // If the typedef has an aligned attribute on it, it overrides any computed 969 // alignment we have. This violates the GCC documentation (which says that 970 // attribute(aligned) can only round up) but matches its implementation. 971 if (unsigned AttrAlign = Typedef->getMaxAlignment()) 972 Align = AttrAlign; 973 else 974 Align = Info.second; 975 Width = Info.first; 976 break; 977 } 978 979 case Type::TypeOfExpr: 980 return getTypeInfo(cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType() 981 .getTypePtr()); 982 983 case Type::TypeOf: 984 return getTypeInfo(cast<TypeOfType>(T)->getUnderlyingType().getTypePtr()); 985 986 case Type::Decltype: 987 return getTypeInfo(cast<DecltypeType>(T)->getUnderlyingExpr()->getType() 988 .getTypePtr()); 989 990 case Type::UnaryTransform: 991 return getTypeInfo(cast<UnaryTransformType>(T)->getUnderlyingType()); 992 993 case Type::Elaborated: 994 return getTypeInfo(cast<ElaboratedType>(T)->getNamedType().getTypePtr()); 995 996 case Type::Attributed: 997 return getTypeInfo( 998 cast<AttributedType>(T)->getEquivalentType().getTypePtr()); 999 1000 case Type::TemplateSpecialization: { 1001 assert(getCanonicalType(T) != T && 1002 "Cannot request the size of a dependent type"); 1003 const TemplateSpecializationType *TST = cast<TemplateSpecializationType>(T); 1004 // A type alias template specialization may refer to a typedef with the 1005 // aligned attribute on it. 1006 if (TST->isTypeAlias()) 1007 return getTypeInfo(TST->getAliasedType().getTypePtr()); 1008 else 1009 return getTypeInfo(getCanonicalType(T)); 1010 } 1011 1012 } 1013 1014 assert(Align && (Align & (Align-1)) == 0 && "Alignment must be power of 2"); 1015 return std::make_pair(Width, Align); 1016} 1017 1018/// toCharUnitsFromBits - Convert a size in bits to a size in characters. 1019CharUnits ASTContext::toCharUnitsFromBits(int64_t BitSize) const { 1020 return CharUnits::fromQuantity(BitSize / getCharWidth()); 1021} 1022 1023/// toBits - Convert a size in characters to a size in characters. 1024int64_t ASTContext::toBits(CharUnits CharSize) const { 1025 return CharSize.getQuantity() * getCharWidth(); 1026} 1027 1028/// getTypeSizeInChars - Return the size of the specified type, in characters. 1029/// This method does not work on incomplete types. 1030CharUnits ASTContext::getTypeSizeInChars(QualType T) const { 1031 return toCharUnitsFromBits(getTypeSize(T)); 1032} 1033CharUnits ASTContext::getTypeSizeInChars(const Type *T) const { 1034 return toCharUnitsFromBits(getTypeSize(T)); 1035} 1036 1037/// getTypeAlignInChars - Return the ABI-specified alignment of a type, in 1038/// characters. This method does not work on incomplete types. 1039CharUnits ASTContext::getTypeAlignInChars(QualType T) const { 1040 return toCharUnitsFromBits(getTypeAlign(T)); 1041} 1042CharUnits ASTContext::getTypeAlignInChars(const Type *T) const { 1043 return toCharUnitsFromBits(getTypeAlign(T)); 1044} 1045 1046/// getPreferredTypeAlign - Return the "preferred" alignment of the specified 1047/// type for the current target in bits. This can be different than the ABI 1048/// alignment in cases where it is beneficial for performance to overalign 1049/// a data type. 1050unsigned ASTContext::getPreferredTypeAlign(const Type *T) const { 1051 unsigned ABIAlign = getTypeAlign(T); 1052 1053 // Double and long long should be naturally aligned if possible. 1054 if (const ComplexType* CT = T->getAs<ComplexType>()) 1055 T = CT->getElementType().getTypePtr(); 1056 if (T->isSpecificBuiltinType(BuiltinType::Double) || 1057 T->isSpecificBuiltinType(BuiltinType::LongLong)) 1058 return std::max(ABIAlign, (unsigned)getTypeSize(T)); 1059 1060 return ABIAlign; 1061} 1062 1063/// ShallowCollectObjCIvars - 1064/// Collect all ivars, including those synthesized, in the current class. 1065/// 1066void ASTContext::ShallowCollectObjCIvars(const ObjCInterfaceDecl *OI, 1067 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) const { 1068 // FIXME. This need be removed but there are two many places which 1069 // assume const-ness of ObjCInterfaceDecl 1070 ObjCInterfaceDecl *IDecl = const_cast<ObjCInterfaceDecl *>(OI); 1071 for (ObjCIvarDecl *Iv = IDecl->all_declared_ivar_begin(); Iv; 1072 Iv= Iv->getNextIvar()) 1073 Ivars.push_back(Iv); 1074} 1075 1076/// DeepCollectObjCIvars - 1077/// This routine first collects all declared, but not synthesized, ivars in 1078/// super class and then collects all ivars, including those synthesized for 1079/// current class. This routine is used for implementation of current class 1080/// when all ivars, declared and synthesized are known. 1081/// 1082void ASTContext::DeepCollectObjCIvars(const ObjCInterfaceDecl *OI, 1083 bool leafClass, 1084 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) const { 1085 if (const ObjCInterfaceDecl *SuperClass = OI->getSuperClass()) 1086 DeepCollectObjCIvars(SuperClass, false, Ivars); 1087 if (!leafClass) { 1088 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 1089 E = OI->ivar_end(); I != E; ++I) 1090 Ivars.push_back(*I); 1091 } 1092 else 1093 ShallowCollectObjCIvars(OI, Ivars); 1094} 1095 1096/// CollectInheritedProtocols - Collect all protocols in current class and 1097/// those inherited by it. 1098void ASTContext::CollectInheritedProtocols(const Decl *CDecl, 1099 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols) { 1100 if (const ObjCInterfaceDecl *OI = dyn_cast<ObjCInterfaceDecl>(CDecl)) { 1101 // We can use protocol_iterator here instead of 1102 // all_referenced_protocol_iterator since we are walking all categories. 1103 for (ObjCInterfaceDecl::all_protocol_iterator P = OI->all_referenced_protocol_begin(), 1104 PE = OI->all_referenced_protocol_end(); P != PE; ++P) { 1105 ObjCProtocolDecl *Proto = (*P); 1106 Protocols.insert(Proto); 1107 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1108 PE = Proto->protocol_end(); P != PE; ++P) { 1109 Protocols.insert(*P); 1110 CollectInheritedProtocols(*P, Protocols); 1111 } 1112 } 1113 1114 // Categories of this Interface. 1115 for (const ObjCCategoryDecl *CDeclChain = OI->getCategoryList(); 1116 CDeclChain; CDeclChain = CDeclChain->getNextClassCategory()) 1117 CollectInheritedProtocols(CDeclChain, Protocols); 1118 if (ObjCInterfaceDecl *SD = OI->getSuperClass()) 1119 while (SD) { 1120 CollectInheritedProtocols(SD, Protocols); 1121 SD = SD->getSuperClass(); 1122 } 1123 } else if (const ObjCCategoryDecl *OC = dyn_cast<ObjCCategoryDecl>(CDecl)) { 1124 for (ObjCCategoryDecl::protocol_iterator P = OC->protocol_begin(), 1125 PE = OC->protocol_end(); P != PE; ++P) { 1126 ObjCProtocolDecl *Proto = (*P); 1127 Protocols.insert(Proto); 1128 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1129 PE = Proto->protocol_end(); P != PE; ++P) 1130 CollectInheritedProtocols(*P, Protocols); 1131 } 1132 } else if (const ObjCProtocolDecl *OP = dyn_cast<ObjCProtocolDecl>(CDecl)) { 1133 for (ObjCProtocolDecl::protocol_iterator P = OP->protocol_begin(), 1134 PE = OP->protocol_end(); P != PE; ++P) { 1135 ObjCProtocolDecl *Proto = (*P); 1136 Protocols.insert(Proto); 1137 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1138 PE = Proto->protocol_end(); P != PE; ++P) 1139 CollectInheritedProtocols(*P, Protocols); 1140 } 1141 } 1142} 1143 1144unsigned ASTContext::CountNonClassIvars(const ObjCInterfaceDecl *OI) const { 1145 unsigned count = 0; 1146 // Count ivars declared in class extension. 1147 for (const ObjCCategoryDecl *CDecl = OI->getFirstClassExtension(); CDecl; 1148 CDecl = CDecl->getNextClassExtension()) 1149 count += CDecl->ivar_size(); 1150 1151 // Count ivar defined in this class's implementation. This 1152 // includes synthesized ivars. 1153 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) 1154 count += ImplDecl->ivar_size(); 1155 1156 return count; 1157} 1158 1159/// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 1160ObjCImplementationDecl *ASTContext::getObjCImplementation(ObjCInterfaceDecl *D) { 1161 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 1162 I = ObjCImpls.find(D); 1163 if (I != ObjCImpls.end()) 1164 return cast<ObjCImplementationDecl>(I->second); 1165 return 0; 1166} 1167/// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 1168ObjCCategoryImplDecl *ASTContext::getObjCImplementation(ObjCCategoryDecl *D) { 1169 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 1170 I = ObjCImpls.find(D); 1171 if (I != ObjCImpls.end()) 1172 return cast<ObjCCategoryImplDecl>(I->second); 1173 return 0; 1174} 1175 1176/// \brief Set the implementation of ObjCInterfaceDecl. 1177void ASTContext::setObjCImplementation(ObjCInterfaceDecl *IFaceD, 1178 ObjCImplementationDecl *ImplD) { 1179 assert(IFaceD && ImplD && "Passed null params"); 1180 ObjCImpls[IFaceD] = ImplD; 1181} 1182/// \brief Set the implementation of ObjCCategoryDecl. 1183void ASTContext::setObjCImplementation(ObjCCategoryDecl *CatD, 1184 ObjCCategoryImplDecl *ImplD) { 1185 assert(CatD && ImplD && "Passed null params"); 1186 ObjCImpls[CatD] = ImplD; 1187} 1188 1189/// \brief Get the copy initialization expression of VarDecl,or NULL if 1190/// none exists. 1191Expr *ASTContext::getBlockVarCopyInits(const VarDecl*VD) { 1192 assert(VD && "Passed null params"); 1193 assert(VD->hasAttr<BlocksAttr>() && 1194 "getBlockVarCopyInits - not __block var"); 1195 llvm::DenseMap<const VarDecl*, Expr*>::iterator 1196 I = BlockVarCopyInits.find(VD); 1197 return (I != BlockVarCopyInits.end()) ? cast<Expr>(I->second) : 0; 1198} 1199 1200/// \brief Set the copy inialization expression of a block var decl. 1201void ASTContext::setBlockVarCopyInits(VarDecl*VD, Expr* Init) { 1202 assert(VD && Init && "Passed null params"); 1203 assert(VD->hasAttr<BlocksAttr>() && 1204 "setBlockVarCopyInits - not __block var"); 1205 BlockVarCopyInits[VD] = Init; 1206} 1207 1208/// \brief Allocate an uninitialized TypeSourceInfo. 1209/// 1210/// The caller should initialize the memory held by TypeSourceInfo using 1211/// the TypeLoc wrappers. 1212/// 1213/// \param T the type that will be the basis for type source info. This type 1214/// should refer to how the declarator was written in source code, not to 1215/// what type semantic analysis resolved the declarator to. 1216TypeSourceInfo *ASTContext::CreateTypeSourceInfo(QualType T, 1217 unsigned DataSize) const { 1218 if (!DataSize) 1219 DataSize = TypeLoc::getFullDataSizeForType(T); 1220 else 1221 assert(DataSize == TypeLoc::getFullDataSizeForType(T) && 1222 "incorrect data size provided to CreateTypeSourceInfo!"); 1223 1224 TypeSourceInfo *TInfo = 1225 (TypeSourceInfo*)BumpAlloc.Allocate(sizeof(TypeSourceInfo) + DataSize, 8); 1226 new (TInfo) TypeSourceInfo(T); 1227 return TInfo; 1228} 1229 1230TypeSourceInfo *ASTContext::getTrivialTypeSourceInfo(QualType T, 1231 SourceLocation L) const { 1232 TypeSourceInfo *DI = CreateTypeSourceInfo(T); 1233 DI->getTypeLoc().initialize(const_cast<ASTContext &>(*this), L); 1234 return DI; 1235} 1236 1237const ASTRecordLayout & 1238ASTContext::getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) const { 1239 return getObjCLayout(D, 0); 1240} 1241 1242const ASTRecordLayout & 1243ASTContext::getASTObjCImplementationLayout( 1244 const ObjCImplementationDecl *D) const { 1245 return getObjCLayout(D->getClassInterface(), D); 1246} 1247 1248//===----------------------------------------------------------------------===// 1249// Type creation/memoization methods 1250//===----------------------------------------------------------------------===// 1251 1252QualType 1253ASTContext::getExtQualType(const Type *baseType, Qualifiers quals) const { 1254 unsigned fastQuals = quals.getFastQualifiers(); 1255 quals.removeFastQualifiers(); 1256 1257 // Check if we've already instantiated this type. 1258 llvm::FoldingSetNodeID ID; 1259 ExtQuals::Profile(ID, baseType, quals); 1260 void *insertPos = 0; 1261 if (ExtQuals *eq = ExtQualNodes.FindNodeOrInsertPos(ID, insertPos)) { 1262 assert(eq->getQualifiers() == quals); 1263 return QualType(eq, fastQuals); 1264 } 1265 1266 // If the base type is not canonical, make the appropriate canonical type. 1267 QualType canon; 1268 if (!baseType->isCanonicalUnqualified()) { 1269 SplitQualType canonSplit = baseType->getCanonicalTypeInternal().split(); 1270 canonSplit.second.addConsistentQualifiers(quals); 1271 canon = getExtQualType(canonSplit.first, canonSplit.second); 1272 1273 // Re-find the insert position. 1274 (void) ExtQualNodes.FindNodeOrInsertPos(ID, insertPos); 1275 } 1276 1277 ExtQuals *eq = new (*this, TypeAlignment) ExtQuals(baseType, canon, quals); 1278 ExtQualNodes.InsertNode(eq, insertPos); 1279 return QualType(eq, fastQuals); 1280} 1281 1282QualType 1283ASTContext::getAddrSpaceQualType(QualType T, unsigned AddressSpace) const { 1284 QualType CanT = getCanonicalType(T); 1285 if (CanT.getAddressSpace() == AddressSpace) 1286 return T; 1287 1288 // If we are composing extended qualifiers together, merge together 1289 // into one ExtQuals node. 1290 QualifierCollector Quals; 1291 const Type *TypeNode = Quals.strip(T); 1292 1293 // If this type already has an address space specified, it cannot get 1294 // another one. 1295 assert(!Quals.hasAddressSpace() && 1296 "Type cannot be in multiple addr spaces!"); 1297 Quals.addAddressSpace(AddressSpace); 1298 1299 return getExtQualType(TypeNode, Quals); 1300} 1301 1302QualType ASTContext::getObjCGCQualType(QualType T, 1303 Qualifiers::GC GCAttr) const { 1304 QualType CanT = getCanonicalType(T); 1305 if (CanT.getObjCGCAttr() == GCAttr) 1306 return T; 1307 1308 if (const PointerType *ptr = T->getAs<PointerType>()) { 1309 QualType Pointee = ptr->getPointeeType(); 1310 if (Pointee->isAnyPointerType()) { 1311 QualType ResultType = getObjCGCQualType(Pointee, GCAttr); 1312 return getPointerType(ResultType); 1313 } 1314 } 1315 1316 // If we are composing extended qualifiers together, merge together 1317 // into one ExtQuals node. 1318 QualifierCollector Quals; 1319 const Type *TypeNode = Quals.strip(T); 1320 1321 // If this type already has an ObjCGC specified, it cannot get 1322 // another one. 1323 assert(!Quals.hasObjCGCAttr() && 1324 "Type cannot have multiple ObjCGCs!"); 1325 Quals.addObjCGCAttr(GCAttr); 1326 1327 return getExtQualType(TypeNode, Quals); 1328} 1329 1330const FunctionType *ASTContext::adjustFunctionType(const FunctionType *T, 1331 FunctionType::ExtInfo Info) { 1332 if (T->getExtInfo() == Info) 1333 return T; 1334 1335 QualType Result; 1336 if (const FunctionNoProtoType *FNPT = dyn_cast<FunctionNoProtoType>(T)) { 1337 Result = getFunctionNoProtoType(FNPT->getResultType(), Info); 1338 } else { 1339 const FunctionProtoType *FPT = cast<FunctionProtoType>(T); 1340 FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); 1341 EPI.ExtInfo = Info; 1342 Result = getFunctionType(FPT->getResultType(), FPT->arg_type_begin(), 1343 FPT->getNumArgs(), EPI); 1344 } 1345 1346 return cast<FunctionType>(Result.getTypePtr()); 1347} 1348 1349/// getComplexType - Return the uniqued reference to the type for a complex 1350/// number with the specified element type. 1351QualType ASTContext::getComplexType(QualType T) const { 1352 // Unique pointers, to guarantee there is only one pointer of a particular 1353 // structure. 1354 llvm::FoldingSetNodeID ID; 1355 ComplexType::Profile(ID, T); 1356 1357 void *InsertPos = 0; 1358 if (ComplexType *CT = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos)) 1359 return QualType(CT, 0); 1360 1361 // If the pointee type isn't canonical, this won't be a canonical type either, 1362 // so fill in the canonical type field. 1363 QualType Canonical; 1364 if (!T.isCanonical()) { 1365 Canonical = getComplexType(getCanonicalType(T)); 1366 1367 // Get the new insert position for the node we care about. 1368 ComplexType *NewIP = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos); 1369 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1370 } 1371 ComplexType *New = new (*this, TypeAlignment) ComplexType(T, Canonical); 1372 Types.push_back(New); 1373 ComplexTypes.InsertNode(New, InsertPos); 1374 return QualType(New, 0); 1375} 1376 1377/// getPointerType - Return the uniqued reference to the type for a pointer to 1378/// the specified type. 1379QualType ASTContext::getPointerType(QualType T) const { 1380 // Unique pointers, to guarantee there is only one pointer of a particular 1381 // structure. 1382 llvm::FoldingSetNodeID ID; 1383 PointerType::Profile(ID, T); 1384 1385 void *InsertPos = 0; 1386 if (PointerType *PT = PointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1387 return QualType(PT, 0); 1388 1389 // If the pointee type isn't canonical, this won't be a canonical type either, 1390 // so fill in the canonical type field. 1391 QualType Canonical; 1392 if (!T.isCanonical()) { 1393 Canonical = getPointerType(getCanonicalType(T)); 1394 1395 // Get the new insert position for the node we care about. 1396 PointerType *NewIP = PointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1397 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1398 } 1399 PointerType *New = new (*this, TypeAlignment) PointerType(T, Canonical); 1400 Types.push_back(New); 1401 PointerTypes.InsertNode(New, InsertPos); 1402 return QualType(New, 0); 1403} 1404 1405/// getBlockPointerType - Return the uniqued reference to the type for 1406/// a pointer to the specified block. 1407QualType ASTContext::getBlockPointerType(QualType T) const { 1408 assert(T->isFunctionType() && "block of function types only"); 1409 // Unique pointers, to guarantee there is only one block of a particular 1410 // structure. 1411 llvm::FoldingSetNodeID ID; 1412 BlockPointerType::Profile(ID, T); 1413 1414 void *InsertPos = 0; 1415 if (BlockPointerType *PT = 1416 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1417 return QualType(PT, 0); 1418 1419 // If the block pointee type isn't canonical, this won't be a canonical 1420 // type either so fill in the canonical type field. 1421 QualType Canonical; 1422 if (!T.isCanonical()) { 1423 Canonical = getBlockPointerType(getCanonicalType(T)); 1424 1425 // Get the new insert position for the node we care about. 1426 BlockPointerType *NewIP = 1427 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1428 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1429 } 1430 BlockPointerType *New 1431 = new (*this, TypeAlignment) BlockPointerType(T, Canonical); 1432 Types.push_back(New); 1433 BlockPointerTypes.InsertNode(New, InsertPos); 1434 return QualType(New, 0); 1435} 1436 1437/// getLValueReferenceType - Return the uniqued reference to the type for an 1438/// lvalue reference to the specified type. 1439QualType 1440ASTContext::getLValueReferenceType(QualType T, bool SpelledAsLValue) const { 1441 assert(getCanonicalType(T) != OverloadTy && 1442 "Unresolved overloaded function type"); 1443 1444 // Unique pointers, to guarantee there is only one pointer of a particular 1445 // structure. 1446 llvm::FoldingSetNodeID ID; 1447 ReferenceType::Profile(ID, T, SpelledAsLValue); 1448 1449 void *InsertPos = 0; 1450 if (LValueReferenceType *RT = 1451 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1452 return QualType(RT, 0); 1453 1454 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1455 1456 // If the referencee type isn't canonical, this won't be a canonical type 1457 // either, so fill in the canonical type field. 1458 QualType Canonical; 1459 if (!SpelledAsLValue || InnerRef || !T.isCanonical()) { 1460 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1461 Canonical = getLValueReferenceType(getCanonicalType(PointeeType)); 1462 1463 // Get the new insert position for the node we care about. 1464 LValueReferenceType *NewIP = 1465 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1466 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1467 } 1468 1469 LValueReferenceType *New 1470 = new (*this, TypeAlignment) LValueReferenceType(T, Canonical, 1471 SpelledAsLValue); 1472 Types.push_back(New); 1473 LValueReferenceTypes.InsertNode(New, InsertPos); 1474 1475 return QualType(New, 0); 1476} 1477 1478/// getRValueReferenceType - Return the uniqued reference to the type for an 1479/// rvalue reference to the specified type. 1480QualType ASTContext::getRValueReferenceType(QualType T) const { 1481 // Unique pointers, to guarantee there is only one pointer of a particular 1482 // structure. 1483 llvm::FoldingSetNodeID ID; 1484 ReferenceType::Profile(ID, T, false); 1485 1486 void *InsertPos = 0; 1487 if (RValueReferenceType *RT = 1488 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1489 return QualType(RT, 0); 1490 1491 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1492 1493 // If the referencee type isn't canonical, this won't be a canonical type 1494 // either, so fill in the canonical type field. 1495 QualType Canonical; 1496 if (InnerRef || !T.isCanonical()) { 1497 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1498 Canonical = getRValueReferenceType(getCanonicalType(PointeeType)); 1499 1500 // Get the new insert position for the node we care about. 1501 RValueReferenceType *NewIP = 1502 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1503 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1504 } 1505 1506 RValueReferenceType *New 1507 = new (*this, TypeAlignment) RValueReferenceType(T, Canonical); 1508 Types.push_back(New); 1509 RValueReferenceTypes.InsertNode(New, InsertPos); 1510 return QualType(New, 0); 1511} 1512 1513/// getMemberPointerType - Return the uniqued reference to the type for a 1514/// member pointer to the specified type, in the specified class. 1515QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls) const { 1516 // Unique pointers, to guarantee there is only one pointer of a particular 1517 // structure. 1518 llvm::FoldingSetNodeID ID; 1519 MemberPointerType::Profile(ID, T, Cls); 1520 1521 void *InsertPos = 0; 1522 if (MemberPointerType *PT = 1523 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1524 return QualType(PT, 0); 1525 1526 // If the pointee or class type isn't canonical, this won't be a canonical 1527 // type either, so fill in the canonical type field. 1528 QualType Canonical; 1529 if (!T.isCanonical() || !Cls->isCanonicalUnqualified()) { 1530 Canonical = getMemberPointerType(getCanonicalType(T),getCanonicalType(Cls)); 1531 1532 // Get the new insert position for the node we care about. 1533 MemberPointerType *NewIP = 1534 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1535 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1536 } 1537 MemberPointerType *New 1538 = new (*this, TypeAlignment) MemberPointerType(T, Cls, Canonical); 1539 Types.push_back(New); 1540 MemberPointerTypes.InsertNode(New, InsertPos); 1541 return QualType(New, 0); 1542} 1543 1544/// getConstantArrayType - Return the unique reference to the type for an 1545/// array of the specified element type. 1546QualType ASTContext::getConstantArrayType(QualType EltTy, 1547 const llvm::APInt &ArySizeIn, 1548 ArrayType::ArraySizeModifier ASM, 1549 unsigned IndexTypeQuals) const { 1550 assert((EltTy->isDependentType() || 1551 EltTy->isIncompleteType() || EltTy->isConstantSizeType()) && 1552 "Constant array of VLAs is illegal!"); 1553 1554 // Convert the array size into a canonical width matching the pointer size for 1555 // the target. 1556 llvm::APInt ArySize(ArySizeIn); 1557 ArySize = 1558 ArySize.zextOrTrunc(Target.getPointerWidth(getTargetAddressSpace(EltTy))); 1559 1560 llvm::FoldingSetNodeID ID; 1561 ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, IndexTypeQuals); 1562 1563 void *InsertPos = 0; 1564 if (ConstantArrayType *ATP = 1565 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1566 return QualType(ATP, 0); 1567 1568 // If the element type isn't canonical or has qualifiers, this won't 1569 // be a canonical type either, so fill in the canonical type field. 1570 QualType Canon; 1571 if (!EltTy.isCanonical() || EltTy.hasLocalQualifiers()) { 1572 SplitQualType canonSplit = getCanonicalType(EltTy).split(); 1573 Canon = getConstantArrayType(QualType(canonSplit.first, 0), ArySize, 1574 ASM, IndexTypeQuals); 1575 Canon = getQualifiedType(Canon, canonSplit.second); 1576 1577 // Get the new insert position for the node we care about. 1578 ConstantArrayType *NewIP = 1579 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1580 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1581 } 1582 1583 ConstantArrayType *New = new(*this,TypeAlignment) 1584 ConstantArrayType(EltTy, Canon, ArySize, ASM, IndexTypeQuals); 1585 ConstantArrayTypes.InsertNode(New, InsertPos); 1586 Types.push_back(New); 1587 return QualType(New, 0); 1588} 1589 1590/// getVariableArrayDecayedType - Turns the given type, which may be 1591/// variably-modified, into the corresponding type with all the known 1592/// sizes replaced with [*]. 1593QualType ASTContext::getVariableArrayDecayedType(QualType type) const { 1594 // Vastly most common case. 1595 if (!type->isVariablyModifiedType()) return type; 1596 1597 QualType result; 1598 1599 SplitQualType split = type.getSplitDesugaredType(); 1600 const Type *ty = split.first; 1601 switch (ty->getTypeClass()) { 1602#define TYPE(Class, Base) 1603#define ABSTRACT_TYPE(Class, Base) 1604#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 1605#include "clang/AST/TypeNodes.def" 1606 llvm_unreachable("didn't desugar past all non-canonical types?"); 1607 1608 // These types should never be variably-modified. 1609 case Type::Builtin: 1610 case Type::Complex: 1611 case Type::Vector: 1612 case Type::ExtVector: 1613 case Type::DependentSizedExtVector: 1614 case Type::ObjCObject: 1615 case Type::ObjCInterface: 1616 case Type::ObjCObjectPointer: 1617 case Type::Record: 1618 case Type::Enum: 1619 case Type::UnresolvedUsing: 1620 case Type::TypeOfExpr: 1621 case Type::TypeOf: 1622 case Type::Decltype: 1623 case Type::UnaryTransform: 1624 case Type::DependentName: 1625 case Type::InjectedClassName: 1626 case Type::TemplateSpecialization: 1627 case Type::DependentTemplateSpecialization: 1628 case Type::TemplateTypeParm: 1629 case Type::SubstTemplateTypeParmPack: 1630 case Type::Auto: 1631 case Type::PackExpansion: 1632 llvm_unreachable("type should never be variably-modified"); 1633 1634 // These types can be variably-modified but should never need to 1635 // further decay. 1636 case Type::FunctionNoProto: 1637 case Type::FunctionProto: 1638 case Type::BlockPointer: 1639 case Type::MemberPointer: 1640 return type; 1641 1642 // These types can be variably-modified. All these modifications 1643 // preserve structure except as noted by comments. 1644 // TODO: if we ever care about optimizing VLAs, there are no-op 1645 // optimizations available here. 1646 case Type::Pointer: 1647 result = getPointerType(getVariableArrayDecayedType( 1648 cast<PointerType>(ty)->getPointeeType())); 1649 break; 1650 1651 case Type::LValueReference: { 1652 const LValueReferenceType *lv = cast<LValueReferenceType>(ty); 1653 result = getLValueReferenceType( 1654 getVariableArrayDecayedType(lv->getPointeeType()), 1655 lv->isSpelledAsLValue()); 1656 break; 1657 } 1658 1659 case Type::RValueReference: { 1660 const RValueReferenceType *lv = cast<RValueReferenceType>(ty); 1661 result = getRValueReferenceType( 1662 getVariableArrayDecayedType(lv->getPointeeType())); 1663 break; 1664 } 1665 1666 case Type::ConstantArray: { 1667 const ConstantArrayType *cat = cast<ConstantArrayType>(ty); 1668 result = getConstantArrayType( 1669 getVariableArrayDecayedType(cat->getElementType()), 1670 cat->getSize(), 1671 cat->getSizeModifier(), 1672 cat->getIndexTypeCVRQualifiers()); 1673 break; 1674 } 1675 1676 case Type::DependentSizedArray: { 1677 const DependentSizedArrayType *dat = cast<DependentSizedArrayType>(ty); 1678 result = getDependentSizedArrayType( 1679 getVariableArrayDecayedType(dat->getElementType()), 1680 dat->getSizeExpr(), 1681 dat->getSizeModifier(), 1682 dat->getIndexTypeCVRQualifiers(), 1683 dat->getBracketsRange()); 1684 break; 1685 } 1686 1687 // Turn incomplete types into [*] types. 1688 case Type::IncompleteArray: { 1689 const IncompleteArrayType *iat = cast<IncompleteArrayType>(ty); 1690 result = getVariableArrayType( 1691 getVariableArrayDecayedType(iat->getElementType()), 1692 /*size*/ 0, 1693 ArrayType::Normal, 1694 iat->getIndexTypeCVRQualifiers(), 1695 SourceRange()); 1696 break; 1697 } 1698 1699 // Turn VLA types into [*] types. 1700 case Type::VariableArray: { 1701 const VariableArrayType *vat = cast<VariableArrayType>(ty); 1702 result = getVariableArrayType( 1703 getVariableArrayDecayedType(vat->getElementType()), 1704 /*size*/ 0, 1705 ArrayType::Star, 1706 vat->getIndexTypeCVRQualifiers(), 1707 vat->getBracketsRange()); 1708 break; 1709 } 1710 } 1711 1712 // Apply the top-level qualifiers from the original. 1713 return getQualifiedType(result, split.second); 1714} 1715 1716/// getVariableArrayType - Returns a non-unique reference to the type for a 1717/// variable array of the specified element type. 1718QualType ASTContext::getVariableArrayType(QualType EltTy, 1719 Expr *NumElts, 1720 ArrayType::ArraySizeModifier ASM, 1721 unsigned IndexTypeQuals, 1722 SourceRange Brackets) const { 1723 // Since we don't unique expressions, it isn't possible to unique VLA's 1724 // that have an expression provided for their size. 1725 QualType Canon; 1726 1727 // Be sure to pull qualifiers off the element type. 1728 if (!EltTy.isCanonical() || EltTy.hasLocalQualifiers()) { 1729 SplitQualType canonSplit = getCanonicalType(EltTy).split(); 1730 Canon = getVariableArrayType(QualType(canonSplit.first, 0), NumElts, ASM, 1731 IndexTypeQuals, Brackets); 1732 Canon = getQualifiedType(Canon, canonSplit.second); 1733 } 1734 1735 VariableArrayType *New = new(*this, TypeAlignment) 1736 VariableArrayType(EltTy, Canon, NumElts, ASM, IndexTypeQuals, Brackets); 1737 1738 VariableArrayTypes.push_back(New); 1739 Types.push_back(New); 1740 return QualType(New, 0); 1741} 1742 1743/// getDependentSizedArrayType - Returns a non-unique reference to 1744/// the type for a dependently-sized array of the specified element 1745/// type. 1746QualType ASTContext::getDependentSizedArrayType(QualType elementType, 1747 Expr *numElements, 1748 ArrayType::ArraySizeModifier ASM, 1749 unsigned elementTypeQuals, 1750 SourceRange brackets) const { 1751 assert((!numElements || numElements->isTypeDependent() || 1752 numElements->isValueDependent()) && 1753 "Size must be type- or value-dependent!"); 1754 1755 // Dependently-sized array types that do not have a specified number 1756 // of elements will have their sizes deduced from a dependent 1757 // initializer. We do no canonicalization here at all, which is okay 1758 // because they can't be used in most locations. 1759 if (!numElements) { 1760 DependentSizedArrayType *newType 1761 = new (*this, TypeAlignment) 1762 DependentSizedArrayType(*this, elementType, QualType(), 1763 numElements, ASM, elementTypeQuals, 1764 brackets); 1765 Types.push_back(newType); 1766 return QualType(newType, 0); 1767 } 1768 1769 // Otherwise, we actually build a new type every time, but we 1770 // also build a canonical type. 1771 1772 SplitQualType canonElementType = getCanonicalType(elementType).split(); 1773 1774 void *insertPos = 0; 1775 llvm::FoldingSetNodeID ID; 1776 DependentSizedArrayType::Profile(ID, *this, 1777 QualType(canonElementType.first, 0), 1778 ASM, elementTypeQuals, numElements); 1779 1780 // Look for an existing type with these properties. 1781 DependentSizedArrayType *canonTy = 1782 DependentSizedArrayTypes.FindNodeOrInsertPos(ID, insertPos); 1783 1784 // If we don't have one, build one. 1785 if (!canonTy) { 1786 canonTy = new (*this, TypeAlignment) 1787 DependentSizedArrayType(*this, QualType(canonElementType.first, 0), 1788 QualType(), numElements, ASM, elementTypeQuals, 1789 brackets); 1790 DependentSizedArrayTypes.InsertNode(canonTy, insertPos); 1791 Types.push_back(canonTy); 1792 } 1793 1794 // Apply qualifiers from the element type to the array. 1795 QualType canon = getQualifiedType(QualType(canonTy,0), 1796 canonElementType.second); 1797 1798 // If we didn't need extra canonicalization for the element type, 1799 // then just use that as our result. 1800 if (QualType(canonElementType.first, 0) == elementType) 1801 return canon; 1802 1803 // Otherwise, we need to build a type which follows the spelling 1804 // of the element type. 1805 DependentSizedArrayType *sugaredType 1806 = new (*this, TypeAlignment) 1807 DependentSizedArrayType(*this, elementType, canon, numElements, 1808 ASM, elementTypeQuals, brackets); 1809 Types.push_back(sugaredType); 1810 return QualType(sugaredType, 0); 1811} 1812 1813QualType ASTContext::getIncompleteArrayType(QualType elementType, 1814 ArrayType::ArraySizeModifier ASM, 1815 unsigned elementTypeQuals) const { 1816 llvm::FoldingSetNodeID ID; 1817 IncompleteArrayType::Profile(ID, elementType, ASM, elementTypeQuals); 1818 1819 void *insertPos = 0; 1820 if (IncompleteArrayType *iat = 1821 IncompleteArrayTypes.FindNodeOrInsertPos(ID, insertPos)) 1822 return QualType(iat, 0); 1823 1824 // If the element type isn't canonical, this won't be a canonical type 1825 // either, so fill in the canonical type field. We also have to pull 1826 // qualifiers off the element type. 1827 QualType canon; 1828 1829 if (!elementType.isCanonical() || elementType.hasLocalQualifiers()) { 1830 SplitQualType canonSplit = getCanonicalType(elementType).split(); 1831 canon = getIncompleteArrayType(QualType(canonSplit.first, 0), 1832 ASM, elementTypeQuals); 1833 canon = getQualifiedType(canon, canonSplit.second); 1834 1835 // Get the new insert position for the node we care about. 1836 IncompleteArrayType *existing = 1837 IncompleteArrayTypes.FindNodeOrInsertPos(ID, insertPos); 1838 assert(!existing && "Shouldn't be in the map!"); (void) existing; 1839 } 1840 1841 IncompleteArrayType *newType = new (*this, TypeAlignment) 1842 IncompleteArrayType(elementType, canon, ASM, elementTypeQuals); 1843 1844 IncompleteArrayTypes.InsertNode(newType, insertPos); 1845 Types.push_back(newType); 1846 return QualType(newType, 0); 1847} 1848 1849/// getVectorType - Return the unique reference to a vector type of 1850/// the specified element type and size. VectorType must be a built-in type. 1851QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts, 1852 VectorType::VectorKind VecKind) const { 1853 assert(vecType->isBuiltinType()); 1854 1855 // Check if we've already instantiated a vector of this type. 1856 llvm::FoldingSetNodeID ID; 1857 VectorType::Profile(ID, vecType, NumElts, Type::Vector, VecKind); 1858 1859 void *InsertPos = 0; 1860 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1861 return QualType(VTP, 0); 1862 1863 // If the element type isn't canonical, this won't be a canonical type either, 1864 // so fill in the canonical type field. 1865 QualType Canonical; 1866 if (!vecType.isCanonical()) { 1867 Canonical = getVectorType(getCanonicalType(vecType), NumElts, VecKind); 1868 1869 // Get the new insert position for the node we care about. 1870 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1871 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1872 } 1873 VectorType *New = new (*this, TypeAlignment) 1874 VectorType(vecType, NumElts, Canonical, VecKind); 1875 VectorTypes.InsertNode(New, InsertPos); 1876 Types.push_back(New); 1877 return QualType(New, 0); 1878} 1879 1880/// getExtVectorType - Return the unique reference to an extended vector type of 1881/// the specified element type and size. VectorType must be a built-in type. 1882QualType 1883ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) const { 1884 assert(vecType->isBuiltinType()); 1885 1886 // Check if we've already instantiated a vector of this type. 1887 llvm::FoldingSetNodeID ID; 1888 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector, 1889 VectorType::GenericVector); 1890 void *InsertPos = 0; 1891 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1892 return QualType(VTP, 0); 1893 1894 // If the element type isn't canonical, this won't be a canonical type either, 1895 // so fill in the canonical type field. 1896 QualType Canonical; 1897 if (!vecType.isCanonical()) { 1898 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts); 1899 1900 // Get the new insert position for the node we care about. 1901 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1902 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1903 } 1904 ExtVectorType *New = new (*this, TypeAlignment) 1905 ExtVectorType(vecType, NumElts, Canonical); 1906 VectorTypes.InsertNode(New, InsertPos); 1907 Types.push_back(New); 1908 return QualType(New, 0); 1909} 1910 1911QualType 1912ASTContext::getDependentSizedExtVectorType(QualType vecType, 1913 Expr *SizeExpr, 1914 SourceLocation AttrLoc) const { 1915 llvm::FoldingSetNodeID ID; 1916 DependentSizedExtVectorType::Profile(ID, *this, getCanonicalType(vecType), 1917 SizeExpr); 1918 1919 void *InsertPos = 0; 1920 DependentSizedExtVectorType *Canon 1921 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1922 DependentSizedExtVectorType *New; 1923 if (Canon) { 1924 // We already have a canonical version of this array type; use it as 1925 // the canonical type for a newly-built type. 1926 New = new (*this, TypeAlignment) 1927 DependentSizedExtVectorType(*this, vecType, QualType(Canon, 0), 1928 SizeExpr, AttrLoc); 1929 } else { 1930 QualType CanonVecTy = getCanonicalType(vecType); 1931 if (CanonVecTy == vecType) { 1932 New = new (*this, TypeAlignment) 1933 DependentSizedExtVectorType(*this, vecType, QualType(), SizeExpr, 1934 AttrLoc); 1935 1936 DependentSizedExtVectorType *CanonCheck 1937 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1938 assert(!CanonCheck && "Dependent-sized ext_vector canonical type broken"); 1939 (void)CanonCheck; 1940 DependentSizedExtVectorTypes.InsertNode(New, InsertPos); 1941 } else { 1942 QualType Canon = getDependentSizedExtVectorType(CanonVecTy, SizeExpr, 1943 SourceLocation()); 1944 New = new (*this, TypeAlignment) 1945 DependentSizedExtVectorType(*this, vecType, Canon, SizeExpr, AttrLoc); 1946 } 1947 } 1948 1949 Types.push_back(New); 1950 return QualType(New, 0); 1951} 1952 1953/// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 1954/// 1955QualType 1956ASTContext::getFunctionNoProtoType(QualType ResultTy, 1957 const FunctionType::ExtInfo &Info) const { 1958 const CallingConv DefaultCC = Info.getCC(); 1959 const CallingConv CallConv = (LangOpts.MRTD && DefaultCC == CC_Default) ? 1960 CC_X86StdCall : DefaultCC; 1961 // Unique functions, to guarantee there is only one function of a particular 1962 // structure. 1963 llvm::FoldingSetNodeID ID; 1964 FunctionNoProtoType::Profile(ID, ResultTy, Info); 1965 1966 void *InsertPos = 0; 1967 if (FunctionNoProtoType *FT = 1968 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1969 return QualType(FT, 0); 1970 1971 QualType Canonical; 1972 if (!ResultTy.isCanonical() || 1973 getCanonicalCallConv(CallConv) != CallConv) { 1974 Canonical = 1975 getFunctionNoProtoType(getCanonicalType(ResultTy), 1976 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1977 1978 // Get the new insert position for the node we care about. 1979 FunctionNoProtoType *NewIP = 1980 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1981 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1982 } 1983 1984 FunctionProtoType::ExtInfo newInfo = Info.withCallingConv(CallConv); 1985 FunctionNoProtoType *New = new (*this, TypeAlignment) 1986 FunctionNoProtoType(ResultTy, Canonical, newInfo); 1987 Types.push_back(New); 1988 FunctionNoProtoTypes.InsertNode(New, InsertPos); 1989 return QualType(New, 0); 1990} 1991 1992/// getFunctionType - Return a normal function type with a typed argument 1993/// list. isVariadic indicates whether the argument list includes '...'. 1994QualType 1995ASTContext::getFunctionType(QualType ResultTy, 1996 const QualType *ArgArray, unsigned NumArgs, 1997 const FunctionProtoType::ExtProtoInfo &EPI) const { 1998 // Unique functions, to guarantee there is only one function of a particular 1999 // structure. 2000 llvm::FoldingSetNodeID ID; 2001 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, EPI, *this); 2002 2003 void *InsertPos = 0; 2004 if (FunctionProtoType *FTP = 2005 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 2006 return QualType(FTP, 0); 2007 2008 // Determine whether the type being created is already canonical or not. 2009 bool isCanonical= EPI.ExceptionSpecType == EST_None && ResultTy.isCanonical(); 2010 for (unsigned i = 0; i != NumArgs && isCanonical; ++i) 2011 if (!ArgArray[i].isCanonicalAsParam()) 2012 isCanonical = false; 2013 2014 const CallingConv DefaultCC = EPI.ExtInfo.getCC(); 2015 const CallingConv CallConv = (LangOpts.MRTD && DefaultCC == CC_Default) ? 2016 CC_X86StdCall : DefaultCC; 2017 2018 // If this type isn't canonical, get the canonical version of it. 2019 // The exception spec is not part of the canonical type. 2020 QualType Canonical; 2021 if (!isCanonical || getCanonicalCallConv(CallConv) != CallConv) { 2022 llvm::SmallVector<QualType, 16> CanonicalArgs; 2023 CanonicalArgs.reserve(NumArgs); 2024 for (unsigned i = 0; i != NumArgs; ++i) 2025 CanonicalArgs.push_back(getCanonicalParamType(ArgArray[i])); 2026 2027 FunctionProtoType::ExtProtoInfo CanonicalEPI = EPI; 2028 CanonicalEPI.ExceptionSpecType = EST_None; 2029 CanonicalEPI.NumExceptions = 0; 2030 CanonicalEPI.ExtInfo 2031 = CanonicalEPI.ExtInfo.withCallingConv(getCanonicalCallConv(CallConv)); 2032 2033 Canonical = getFunctionType(getCanonicalType(ResultTy), 2034 CanonicalArgs.data(), NumArgs, 2035 CanonicalEPI); 2036 2037 // Get the new insert position for the node we care about. 2038 FunctionProtoType *NewIP = 2039 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 2040 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 2041 } 2042 2043 // FunctionProtoType objects are allocated with extra bytes after them 2044 // for two variable size arrays (for parameter and exception types) at the 2045 // end of them. Instead of the exception types, there could be a noexcept 2046 // expression and a context pointer. 2047 size_t Size = sizeof(FunctionProtoType) + 2048 NumArgs * sizeof(QualType); 2049 if (EPI.ExceptionSpecType == EST_Dynamic) 2050 Size += EPI.NumExceptions * sizeof(QualType); 2051 else if (EPI.ExceptionSpecType == EST_ComputedNoexcept) { 2052 Size += sizeof(Expr*); 2053 } 2054 FunctionProtoType *FTP = (FunctionProtoType*) Allocate(Size, TypeAlignment); 2055 FunctionProtoType::ExtProtoInfo newEPI = EPI; 2056 newEPI.ExtInfo = EPI.ExtInfo.withCallingConv(CallConv); 2057 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, Canonical, newEPI); 2058 Types.push_back(FTP); 2059 FunctionProtoTypes.InsertNode(FTP, InsertPos); 2060 return QualType(FTP, 0); 2061} 2062 2063#ifndef NDEBUG 2064static bool NeedsInjectedClassNameType(const RecordDecl *D) { 2065 if (!isa<CXXRecordDecl>(D)) return false; 2066 const CXXRecordDecl *RD = cast<CXXRecordDecl>(D); 2067 if (isa<ClassTemplatePartialSpecializationDecl>(RD)) 2068 return true; 2069 if (RD->getDescribedClassTemplate() && 2070 !isa<ClassTemplateSpecializationDecl>(RD)) 2071 return true; 2072 return false; 2073} 2074#endif 2075 2076/// getInjectedClassNameType - Return the unique reference to the 2077/// injected class name type for the specified templated declaration. 2078QualType ASTContext::getInjectedClassNameType(CXXRecordDecl *Decl, 2079 QualType TST) const { 2080 assert(NeedsInjectedClassNameType(Decl)); 2081 if (Decl->TypeForDecl) { 2082 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 2083 } else if (CXXRecordDecl *PrevDecl = Decl->getPreviousDeclaration()) { 2084 assert(PrevDecl->TypeForDecl && "previous declaration has no type"); 2085 Decl->TypeForDecl = PrevDecl->TypeForDecl; 2086 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 2087 } else { 2088 Type *newType = 2089 new (*this, TypeAlignment) InjectedClassNameType(Decl, TST); 2090 Decl->TypeForDecl = newType; 2091 Types.push_back(newType); 2092 } 2093 return QualType(Decl->TypeForDecl, 0); 2094} 2095 2096/// getTypeDeclType - Return the unique reference to the type for the 2097/// specified type declaration. 2098QualType ASTContext::getTypeDeclTypeSlow(const TypeDecl *Decl) const { 2099 assert(Decl && "Passed null for Decl param"); 2100 assert(!Decl->TypeForDecl && "TypeForDecl present in slow case"); 2101 2102 if (const TypedefNameDecl *Typedef = dyn_cast<TypedefNameDecl>(Decl)) 2103 return getTypedefType(Typedef); 2104 2105 assert(!isa<TemplateTypeParmDecl>(Decl) && 2106 "Template type parameter types are always available."); 2107 2108 if (const RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) { 2109 assert(!Record->getPreviousDeclaration() && 2110 "struct/union has previous declaration"); 2111 assert(!NeedsInjectedClassNameType(Record)); 2112 return getRecordType(Record); 2113 } else if (const EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) { 2114 assert(!Enum->getPreviousDeclaration() && 2115 "enum has previous declaration"); 2116 return getEnumType(Enum); 2117 } else if (const UnresolvedUsingTypenameDecl *Using = 2118 dyn_cast<UnresolvedUsingTypenameDecl>(Decl)) { 2119 Type *newType = new (*this, TypeAlignment) UnresolvedUsingType(Using); 2120 Decl->TypeForDecl = newType; 2121 Types.push_back(newType); 2122 } else 2123 llvm_unreachable("TypeDecl without a type?"); 2124 2125 return QualType(Decl->TypeForDecl, 0); 2126} 2127 2128/// getTypedefType - Return the unique reference to the type for the 2129/// specified typedef name decl. 2130QualType 2131ASTContext::getTypedefType(const TypedefNameDecl *Decl, 2132 QualType Canonical) const { 2133 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2134 2135 if (Canonical.isNull()) 2136 Canonical = getCanonicalType(Decl->getUnderlyingType()); 2137 TypedefType *newType = new(*this, TypeAlignment) 2138 TypedefType(Type::Typedef, Decl, Canonical); 2139 Decl->TypeForDecl = newType; 2140 Types.push_back(newType); 2141 return QualType(newType, 0); 2142} 2143 2144QualType ASTContext::getRecordType(const RecordDecl *Decl) const { 2145 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2146 2147 if (const RecordDecl *PrevDecl = Decl->getPreviousDeclaration()) 2148 if (PrevDecl->TypeForDecl) 2149 return QualType(Decl->TypeForDecl = PrevDecl->TypeForDecl, 0); 2150 2151 RecordType *newType = new (*this, TypeAlignment) RecordType(Decl); 2152 Decl->TypeForDecl = newType; 2153 Types.push_back(newType); 2154 return QualType(newType, 0); 2155} 2156 2157QualType ASTContext::getEnumType(const EnumDecl *Decl) const { 2158 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2159 2160 if (const EnumDecl *PrevDecl = Decl->getPreviousDeclaration()) 2161 if (PrevDecl->TypeForDecl) 2162 return QualType(Decl->TypeForDecl = PrevDecl->TypeForDecl, 0); 2163 2164 EnumType *newType = new (*this, TypeAlignment) EnumType(Decl); 2165 Decl->TypeForDecl = newType; 2166 Types.push_back(newType); 2167 return QualType(newType, 0); 2168} 2169 2170QualType ASTContext::getAttributedType(AttributedType::Kind attrKind, 2171 QualType modifiedType, 2172 QualType equivalentType) { 2173 llvm::FoldingSetNodeID id; 2174 AttributedType::Profile(id, attrKind, modifiedType, equivalentType); 2175 2176 void *insertPos = 0; 2177 AttributedType *type = AttributedTypes.FindNodeOrInsertPos(id, insertPos); 2178 if (type) return QualType(type, 0); 2179 2180 QualType canon = getCanonicalType(equivalentType); 2181 type = new (*this, TypeAlignment) 2182 AttributedType(canon, attrKind, modifiedType, equivalentType); 2183 2184 Types.push_back(type); 2185 AttributedTypes.InsertNode(type, insertPos); 2186 2187 return QualType(type, 0); 2188} 2189 2190 2191/// \brief Retrieve a substitution-result type. 2192QualType 2193ASTContext::getSubstTemplateTypeParmType(const TemplateTypeParmType *Parm, 2194 QualType Replacement) const { 2195 assert(Replacement.isCanonical() 2196 && "replacement types must always be canonical"); 2197 2198 llvm::FoldingSetNodeID ID; 2199 SubstTemplateTypeParmType::Profile(ID, Parm, Replacement); 2200 void *InsertPos = 0; 2201 SubstTemplateTypeParmType *SubstParm 2202 = SubstTemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2203 2204 if (!SubstParm) { 2205 SubstParm = new (*this, TypeAlignment) 2206 SubstTemplateTypeParmType(Parm, Replacement); 2207 Types.push_back(SubstParm); 2208 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 2209 } 2210 2211 return QualType(SubstParm, 0); 2212} 2213 2214/// \brief Retrieve a 2215QualType ASTContext::getSubstTemplateTypeParmPackType( 2216 const TemplateTypeParmType *Parm, 2217 const TemplateArgument &ArgPack) { 2218#ifndef NDEBUG 2219 for (TemplateArgument::pack_iterator P = ArgPack.pack_begin(), 2220 PEnd = ArgPack.pack_end(); 2221 P != PEnd; ++P) { 2222 assert(P->getKind() == TemplateArgument::Type &&"Pack contains a non-type"); 2223 assert(P->getAsType().isCanonical() && "Pack contains non-canonical type"); 2224 } 2225#endif 2226 2227 llvm::FoldingSetNodeID ID; 2228 SubstTemplateTypeParmPackType::Profile(ID, Parm, ArgPack); 2229 void *InsertPos = 0; 2230 if (SubstTemplateTypeParmPackType *SubstParm 2231 = SubstTemplateTypeParmPackTypes.FindNodeOrInsertPos(ID, InsertPos)) 2232 return QualType(SubstParm, 0); 2233 2234 QualType Canon; 2235 if (!Parm->isCanonicalUnqualified()) { 2236 Canon = getCanonicalType(QualType(Parm, 0)); 2237 Canon = getSubstTemplateTypeParmPackType(cast<TemplateTypeParmType>(Canon), 2238 ArgPack); 2239 SubstTemplateTypeParmPackTypes.FindNodeOrInsertPos(ID, InsertPos); 2240 } 2241 2242 SubstTemplateTypeParmPackType *SubstParm 2243 = new (*this, TypeAlignment) SubstTemplateTypeParmPackType(Parm, Canon, 2244 ArgPack); 2245 Types.push_back(SubstParm); 2246 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 2247 return QualType(SubstParm, 0); 2248} 2249 2250/// \brief Retrieve the template type parameter type for a template 2251/// parameter or parameter pack with the given depth, index, and (optionally) 2252/// name. 2253QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index, 2254 bool ParameterPack, 2255 TemplateTypeParmDecl *TTPDecl) const { 2256 llvm::FoldingSetNodeID ID; 2257 TemplateTypeParmType::Profile(ID, Depth, Index, ParameterPack, TTPDecl); 2258 void *InsertPos = 0; 2259 TemplateTypeParmType *TypeParm 2260 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2261 2262 if (TypeParm) 2263 return QualType(TypeParm, 0); 2264 2265 if (TTPDecl) { 2266 QualType Canon = getTemplateTypeParmType(Depth, Index, ParameterPack); 2267 TypeParm = new (*this, TypeAlignment) TemplateTypeParmType(TTPDecl, Canon); 2268 2269 TemplateTypeParmType *TypeCheck 2270 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2271 assert(!TypeCheck && "Template type parameter canonical type broken"); 2272 (void)TypeCheck; 2273 } else 2274 TypeParm = new (*this, TypeAlignment) 2275 TemplateTypeParmType(Depth, Index, ParameterPack); 2276 2277 Types.push_back(TypeParm); 2278 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos); 2279 2280 return QualType(TypeParm, 0); 2281} 2282 2283TypeSourceInfo * 2284ASTContext::getTemplateSpecializationTypeInfo(TemplateName Name, 2285 SourceLocation NameLoc, 2286 const TemplateArgumentListInfo &Args, 2287 QualType Underlying) const { 2288 assert(!Name.getAsDependentTemplateName() && 2289 "No dependent template names here!"); 2290 QualType TST = getTemplateSpecializationType(Name, Args, Underlying); 2291 2292 TypeSourceInfo *DI = CreateTypeSourceInfo(TST); 2293 TemplateSpecializationTypeLoc TL 2294 = cast<TemplateSpecializationTypeLoc>(DI->getTypeLoc()); 2295 TL.setTemplateNameLoc(NameLoc); 2296 TL.setLAngleLoc(Args.getLAngleLoc()); 2297 TL.setRAngleLoc(Args.getRAngleLoc()); 2298 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 2299 TL.setArgLocInfo(i, Args[i].getLocInfo()); 2300 return DI; 2301} 2302 2303QualType 2304ASTContext::getTemplateSpecializationType(TemplateName Template, 2305 const TemplateArgumentListInfo &Args, 2306 QualType Underlying) const { 2307 assert(!Template.getAsDependentTemplateName() && 2308 "No dependent template names here!"); 2309 2310 unsigned NumArgs = Args.size(); 2311 2312 llvm::SmallVector<TemplateArgument, 4> ArgVec; 2313 ArgVec.reserve(NumArgs); 2314 for (unsigned i = 0; i != NumArgs; ++i) 2315 ArgVec.push_back(Args[i].getArgument()); 2316 2317 return getTemplateSpecializationType(Template, ArgVec.data(), NumArgs, 2318 Underlying); 2319} 2320 2321QualType 2322ASTContext::getTemplateSpecializationType(TemplateName Template, 2323 const TemplateArgument *Args, 2324 unsigned NumArgs, 2325 QualType Underlying) const { 2326 assert(!Template.getAsDependentTemplateName() && 2327 "No dependent template names here!"); 2328 // Look through qualified template names. 2329 if (QualifiedTemplateName *QTN = Template.getAsQualifiedTemplateName()) 2330 Template = TemplateName(QTN->getTemplateDecl()); 2331 2332 bool isTypeAlias = 2333 Template.getAsTemplateDecl() && 2334 isa<TypeAliasTemplateDecl>(Template.getAsTemplateDecl()); 2335 2336 QualType CanonType; 2337 if (!Underlying.isNull()) 2338 CanonType = getCanonicalType(Underlying); 2339 else { 2340 assert(!isTypeAlias && 2341 "Underlying type for template alias must be computed by caller"); 2342 CanonType = getCanonicalTemplateSpecializationType(Template, Args, 2343 NumArgs); 2344 } 2345 2346 // Allocate the (non-canonical) template specialization type, but don't 2347 // try to unique it: these types typically have location information that 2348 // we don't unique and don't want to lose. 2349 void *Mem = Allocate(sizeof(TemplateSpecializationType) + 2350 sizeof(TemplateArgument) * NumArgs + 2351 (isTypeAlias ? sizeof(QualType) : 0), 2352 TypeAlignment); 2353 TemplateSpecializationType *Spec 2354 = new (Mem) TemplateSpecializationType(Template, 2355 Args, NumArgs, 2356 CanonType, 2357 isTypeAlias ? Underlying : QualType()); 2358 2359 Types.push_back(Spec); 2360 return QualType(Spec, 0); 2361} 2362 2363QualType 2364ASTContext::getCanonicalTemplateSpecializationType(TemplateName Template, 2365 const TemplateArgument *Args, 2366 unsigned NumArgs) const { 2367 assert(!Template.getAsDependentTemplateName() && 2368 "No dependent template names here!"); 2369 assert((!Template.getAsTemplateDecl() || 2370 !isa<TypeAliasTemplateDecl>(Template.getAsTemplateDecl())) && 2371 "Underlying type for template alias must be computed by caller"); 2372 2373 // Look through qualified template names. 2374 if (QualifiedTemplateName *QTN = Template.getAsQualifiedTemplateName()) 2375 Template = TemplateName(QTN->getTemplateDecl()); 2376 2377 // Build the canonical template specialization type. 2378 TemplateName CanonTemplate = getCanonicalTemplateName(Template); 2379 llvm::SmallVector<TemplateArgument, 4> CanonArgs; 2380 CanonArgs.reserve(NumArgs); 2381 for (unsigned I = 0; I != NumArgs; ++I) 2382 CanonArgs.push_back(getCanonicalTemplateArgument(Args[I])); 2383 2384 // Determine whether this canonical template specialization type already 2385 // exists. 2386 llvm::FoldingSetNodeID ID; 2387 TemplateSpecializationType::Profile(ID, CanonTemplate, 2388 CanonArgs.data(), NumArgs, *this); 2389 2390 void *InsertPos = 0; 2391 TemplateSpecializationType *Spec 2392 = TemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2393 2394 if (!Spec) { 2395 // Allocate a new canonical template specialization type. 2396 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 2397 sizeof(TemplateArgument) * NumArgs), 2398 TypeAlignment); 2399 Spec = new (Mem) TemplateSpecializationType(CanonTemplate, 2400 CanonArgs.data(), NumArgs, 2401 QualType(), QualType()); 2402 Types.push_back(Spec); 2403 TemplateSpecializationTypes.InsertNode(Spec, InsertPos); 2404 } 2405 2406 assert(Spec->isDependentType() && 2407 "Non-dependent template-id type must have a canonical type"); 2408 return QualType(Spec, 0); 2409} 2410 2411QualType 2412ASTContext::getElaboratedType(ElaboratedTypeKeyword Keyword, 2413 NestedNameSpecifier *NNS, 2414 QualType NamedType) const { 2415 llvm::FoldingSetNodeID ID; 2416 ElaboratedType::Profile(ID, Keyword, NNS, NamedType); 2417 2418 void *InsertPos = 0; 2419 ElaboratedType *T = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2420 if (T) 2421 return QualType(T, 0); 2422 2423 QualType Canon = NamedType; 2424 if (!Canon.isCanonical()) { 2425 Canon = getCanonicalType(NamedType); 2426 ElaboratedType *CheckT = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2427 assert(!CheckT && "Elaborated canonical type broken"); 2428 (void)CheckT; 2429 } 2430 2431 T = new (*this) ElaboratedType(Keyword, NNS, NamedType, Canon); 2432 Types.push_back(T); 2433 ElaboratedTypes.InsertNode(T, InsertPos); 2434 return QualType(T, 0); 2435} 2436 2437QualType 2438ASTContext::getParenType(QualType InnerType) const { 2439 llvm::FoldingSetNodeID ID; 2440 ParenType::Profile(ID, InnerType); 2441 2442 void *InsertPos = 0; 2443 ParenType *T = ParenTypes.FindNodeOrInsertPos(ID, InsertPos); 2444 if (T) 2445 return QualType(T, 0); 2446 2447 QualType Canon = InnerType; 2448 if (!Canon.isCanonical()) { 2449 Canon = getCanonicalType(InnerType); 2450 ParenType *CheckT = ParenTypes.FindNodeOrInsertPos(ID, InsertPos); 2451 assert(!CheckT && "Paren canonical type broken"); 2452 (void)CheckT; 2453 } 2454 2455 T = new (*this) ParenType(InnerType, Canon); 2456 Types.push_back(T); 2457 ParenTypes.InsertNode(T, InsertPos); 2458 return QualType(T, 0); 2459} 2460 2461QualType ASTContext::getDependentNameType(ElaboratedTypeKeyword Keyword, 2462 NestedNameSpecifier *NNS, 2463 const IdentifierInfo *Name, 2464 QualType Canon) const { 2465 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 2466 2467 if (Canon.isNull()) { 2468 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2469 ElaboratedTypeKeyword CanonKeyword = Keyword; 2470 if (Keyword == ETK_None) 2471 CanonKeyword = ETK_Typename; 2472 2473 if (CanonNNS != NNS || CanonKeyword != Keyword) 2474 Canon = getDependentNameType(CanonKeyword, CanonNNS, Name); 2475 } 2476 2477 llvm::FoldingSetNodeID ID; 2478 DependentNameType::Profile(ID, Keyword, NNS, Name); 2479 2480 void *InsertPos = 0; 2481 DependentNameType *T 2482 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 2483 if (T) 2484 return QualType(T, 0); 2485 2486 T = new (*this) DependentNameType(Keyword, NNS, Name, Canon); 2487 Types.push_back(T); 2488 DependentNameTypes.InsertNode(T, InsertPos); 2489 return QualType(T, 0); 2490} 2491 2492QualType 2493ASTContext::getDependentTemplateSpecializationType( 2494 ElaboratedTypeKeyword Keyword, 2495 NestedNameSpecifier *NNS, 2496 const IdentifierInfo *Name, 2497 const TemplateArgumentListInfo &Args) const { 2498 // TODO: avoid this copy 2499 llvm::SmallVector<TemplateArgument, 16> ArgCopy; 2500 for (unsigned I = 0, E = Args.size(); I != E; ++I) 2501 ArgCopy.push_back(Args[I].getArgument()); 2502 return getDependentTemplateSpecializationType(Keyword, NNS, Name, 2503 ArgCopy.size(), 2504 ArgCopy.data()); 2505} 2506 2507QualType 2508ASTContext::getDependentTemplateSpecializationType( 2509 ElaboratedTypeKeyword Keyword, 2510 NestedNameSpecifier *NNS, 2511 const IdentifierInfo *Name, 2512 unsigned NumArgs, 2513 const TemplateArgument *Args) const { 2514 assert((!NNS || NNS->isDependent()) && 2515 "nested-name-specifier must be dependent"); 2516 2517 llvm::FoldingSetNodeID ID; 2518 DependentTemplateSpecializationType::Profile(ID, *this, Keyword, NNS, 2519 Name, NumArgs, Args); 2520 2521 void *InsertPos = 0; 2522 DependentTemplateSpecializationType *T 2523 = DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2524 if (T) 2525 return QualType(T, 0); 2526 2527 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2528 2529 ElaboratedTypeKeyword CanonKeyword = Keyword; 2530 if (Keyword == ETK_None) CanonKeyword = ETK_Typename; 2531 2532 bool AnyNonCanonArgs = false; 2533 llvm::SmallVector<TemplateArgument, 16> CanonArgs(NumArgs); 2534 for (unsigned I = 0; I != NumArgs; ++I) { 2535 CanonArgs[I] = getCanonicalTemplateArgument(Args[I]); 2536 if (!CanonArgs[I].structurallyEquals(Args[I])) 2537 AnyNonCanonArgs = true; 2538 } 2539 2540 QualType Canon; 2541 if (AnyNonCanonArgs || CanonNNS != NNS || CanonKeyword != Keyword) { 2542 Canon = getDependentTemplateSpecializationType(CanonKeyword, CanonNNS, 2543 Name, NumArgs, 2544 CanonArgs.data()); 2545 2546 // Find the insert position again. 2547 DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2548 } 2549 2550 void *Mem = Allocate((sizeof(DependentTemplateSpecializationType) + 2551 sizeof(TemplateArgument) * NumArgs), 2552 TypeAlignment); 2553 T = new (Mem) DependentTemplateSpecializationType(Keyword, NNS, 2554 Name, NumArgs, Args, Canon); 2555 Types.push_back(T); 2556 DependentTemplateSpecializationTypes.InsertNode(T, InsertPos); 2557 return QualType(T, 0); 2558} 2559 2560QualType ASTContext::getPackExpansionType(QualType Pattern, 2561 llvm::Optional<unsigned> NumExpansions) { 2562 llvm::FoldingSetNodeID ID; 2563 PackExpansionType::Profile(ID, Pattern, NumExpansions); 2564 2565 assert(Pattern->containsUnexpandedParameterPack() && 2566 "Pack expansions must expand one or more parameter packs"); 2567 void *InsertPos = 0; 2568 PackExpansionType *T 2569 = PackExpansionTypes.FindNodeOrInsertPos(ID, InsertPos); 2570 if (T) 2571 return QualType(T, 0); 2572 2573 QualType Canon; 2574 if (!Pattern.isCanonical()) { 2575 Canon = getPackExpansionType(getCanonicalType(Pattern), NumExpansions); 2576 2577 // Find the insert position again. 2578 PackExpansionTypes.FindNodeOrInsertPos(ID, InsertPos); 2579 } 2580 2581 T = new (*this) PackExpansionType(Pattern, Canon, NumExpansions); 2582 Types.push_back(T); 2583 PackExpansionTypes.InsertNode(T, InsertPos); 2584 return QualType(T, 0); 2585} 2586 2587/// CmpProtocolNames - Comparison predicate for sorting protocols 2588/// alphabetically. 2589static bool CmpProtocolNames(const ObjCProtocolDecl *LHS, 2590 const ObjCProtocolDecl *RHS) { 2591 return LHS->getDeclName() < RHS->getDeclName(); 2592} 2593 2594static bool areSortedAndUniqued(ObjCProtocolDecl * const *Protocols, 2595 unsigned NumProtocols) { 2596 if (NumProtocols == 0) return true; 2597 2598 for (unsigned i = 1; i != NumProtocols; ++i) 2599 if (!CmpProtocolNames(Protocols[i-1], Protocols[i])) 2600 return false; 2601 return true; 2602} 2603 2604static void SortAndUniqueProtocols(ObjCProtocolDecl **Protocols, 2605 unsigned &NumProtocols) { 2606 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols; 2607 2608 // Sort protocols, keyed by name. 2609 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames); 2610 2611 // Remove duplicates. 2612 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd); 2613 NumProtocols = ProtocolsEnd-Protocols; 2614} 2615 2616QualType ASTContext::getObjCObjectType(QualType BaseType, 2617 ObjCProtocolDecl * const *Protocols, 2618 unsigned NumProtocols) const { 2619 // If the base type is an interface and there aren't any protocols 2620 // to add, then the interface type will do just fine. 2621 if (!NumProtocols && isa<ObjCInterfaceType>(BaseType)) 2622 return BaseType; 2623 2624 // Look in the folding set for an existing type. 2625 llvm::FoldingSetNodeID ID; 2626 ObjCObjectTypeImpl::Profile(ID, BaseType, Protocols, NumProtocols); 2627 void *InsertPos = 0; 2628 if (ObjCObjectType *QT = ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos)) 2629 return QualType(QT, 0); 2630 2631 // Build the canonical type, which has the canonical base type and 2632 // a sorted-and-uniqued list of protocols. 2633 QualType Canonical; 2634 bool ProtocolsSorted = areSortedAndUniqued(Protocols, NumProtocols); 2635 if (!ProtocolsSorted || !BaseType.isCanonical()) { 2636 if (!ProtocolsSorted) { 2637 llvm::SmallVector<ObjCProtocolDecl*, 8> Sorted(Protocols, 2638 Protocols + NumProtocols); 2639 unsigned UniqueCount = NumProtocols; 2640 2641 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2642 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2643 &Sorted[0], UniqueCount); 2644 } else { 2645 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2646 Protocols, NumProtocols); 2647 } 2648 2649 // Regenerate InsertPos. 2650 ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos); 2651 } 2652 2653 unsigned Size = sizeof(ObjCObjectTypeImpl); 2654 Size += NumProtocols * sizeof(ObjCProtocolDecl *); 2655 void *Mem = Allocate(Size, TypeAlignment); 2656 ObjCObjectTypeImpl *T = 2657 new (Mem) ObjCObjectTypeImpl(Canonical, BaseType, Protocols, NumProtocols); 2658 2659 Types.push_back(T); 2660 ObjCObjectTypes.InsertNode(T, InsertPos); 2661 return QualType(T, 0); 2662} 2663 2664/// getObjCObjectPointerType - Return a ObjCObjectPointerType type for 2665/// the given object type. 2666QualType ASTContext::getObjCObjectPointerType(QualType ObjectT) const { 2667 llvm::FoldingSetNodeID ID; 2668 ObjCObjectPointerType::Profile(ID, ObjectT); 2669 2670 void *InsertPos = 0; 2671 if (ObjCObjectPointerType *QT = 2672 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 2673 return QualType(QT, 0); 2674 2675 // Find the canonical object type. 2676 QualType Canonical; 2677 if (!ObjectT.isCanonical()) { 2678 Canonical = getObjCObjectPointerType(getCanonicalType(ObjectT)); 2679 2680 // Regenerate InsertPos. 2681 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 2682 } 2683 2684 // No match. 2685 void *Mem = Allocate(sizeof(ObjCObjectPointerType), TypeAlignment); 2686 ObjCObjectPointerType *QType = 2687 new (Mem) ObjCObjectPointerType(Canonical, ObjectT); 2688 2689 Types.push_back(QType); 2690 ObjCObjectPointerTypes.InsertNode(QType, InsertPos); 2691 return QualType(QType, 0); 2692} 2693 2694/// getObjCInterfaceType - Return the unique reference to the type for the 2695/// specified ObjC interface decl. The list of protocols is optional. 2696QualType ASTContext::getObjCInterfaceType(const ObjCInterfaceDecl *Decl) const { 2697 if (Decl->TypeForDecl) 2698 return QualType(Decl->TypeForDecl, 0); 2699 2700 // FIXME: redeclarations? 2701 void *Mem = Allocate(sizeof(ObjCInterfaceType), TypeAlignment); 2702 ObjCInterfaceType *T = new (Mem) ObjCInterfaceType(Decl); 2703 Decl->TypeForDecl = T; 2704 Types.push_back(T); 2705 return QualType(T, 0); 2706} 2707 2708/// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique 2709/// TypeOfExprType AST's (since expression's are never shared). For example, 2710/// multiple declarations that refer to "typeof(x)" all contain different 2711/// DeclRefExpr's. This doesn't effect the type checker, since it operates 2712/// on canonical type's (which are always unique). 2713QualType ASTContext::getTypeOfExprType(Expr *tofExpr) const { 2714 TypeOfExprType *toe; 2715 if (tofExpr->isTypeDependent()) { 2716 llvm::FoldingSetNodeID ID; 2717 DependentTypeOfExprType::Profile(ID, *this, tofExpr); 2718 2719 void *InsertPos = 0; 2720 DependentTypeOfExprType *Canon 2721 = DependentTypeOfExprTypes.FindNodeOrInsertPos(ID, InsertPos); 2722 if (Canon) { 2723 // We already have a "canonical" version of an identical, dependent 2724 // typeof(expr) type. Use that as our canonical type. 2725 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, 2726 QualType((TypeOfExprType*)Canon, 0)); 2727 } 2728 else { 2729 // Build a new, canonical typeof(expr) type. 2730 Canon 2731 = new (*this, TypeAlignment) DependentTypeOfExprType(*this, tofExpr); 2732 DependentTypeOfExprTypes.InsertNode(Canon, InsertPos); 2733 toe = Canon; 2734 } 2735 } else { 2736 QualType Canonical = getCanonicalType(tofExpr->getType()); 2737 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, Canonical); 2738 } 2739 Types.push_back(toe); 2740 return QualType(toe, 0); 2741} 2742 2743/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique 2744/// TypeOfType AST's. The only motivation to unique these nodes would be 2745/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be 2746/// an issue. This doesn't effect the type checker, since it operates 2747/// on canonical type's (which are always unique). 2748QualType ASTContext::getTypeOfType(QualType tofType) const { 2749 QualType Canonical = getCanonicalType(tofType); 2750 TypeOfType *tot = new (*this, TypeAlignment) TypeOfType(tofType, Canonical); 2751 Types.push_back(tot); 2752 return QualType(tot, 0); 2753} 2754 2755/// getDecltypeForExpr - Given an expr, will return the decltype for that 2756/// expression, according to the rules in C++0x [dcl.type.simple]p4 2757static QualType getDecltypeForExpr(const Expr *e, const ASTContext &Context) { 2758 if (e->isTypeDependent()) 2759 return Context.DependentTy; 2760 2761 // If e is an id expression or a class member access, decltype(e) is defined 2762 // as the type of the entity named by e. 2763 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(e)) { 2764 if (const ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl())) 2765 return VD->getType(); 2766 } 2767 if (const MemberExpr *ME = dyn_cast<MemberExpr>(e)) { 2768 if (const FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) 2769 return FD->getType(); 2770 } 2771 // If e is a function call or an invocation of an overloaded operator, 2772 // (parentheses around e are ignored), decltype(e) is defined as the 2773 // return type of that function. 2774 if (const CallExpr *CE = dyn_cast<CallExpr>(e->IgnoreParens())) 2775 return CE->getCallReturnType(); 2776 2777 QualType T = e->getType(); 2778 2779 // Otherwise, where T is the type of e, if e is an lvalue, decltype(e) is 2780 // defined as T&, otherwise decltype(e) is defined as T. 2781 if (e->isLValue()) 2782 T = Context.getLValueReferenceType(T); 2783 2784 return T; 2785} 2786 2787/// getDecltypeType - Unlike many "get<Type>" functions, we don't unique 2788/// DecltypeType AST's. The only motivation to unique these nodes would be 2789/// memory savings. Since decltype(t) is fairly uncommon, space shouldn't be 2790/// an issue. This doesn't effect the type checker, since it operates 2791/// on canonical type's (which are always unique). 2792QualType ASTContext::getDecltypeType(Expr *e) const { 2793 DecltypeType *dt; 2794 if (e->isTypeDependent()) { 2795 llvm::FoldingSetNodeID ID; 2796 DependentDecltypeType::Profile(ID, *this, e); 2797 2798 void *InsertPos = 0; 2799 DependentDecltypeType *Canon 2800 = DependentDecltypeTypes.FindNodeOrInsertPos(ID, InsertPos); 2801 if (Canon) { 2802 // We already have a "canonical" version of an equivalent, dependent 2803 // decltype type. Use that as our canonical type. 2804 dt = new (*this, TypeAlignment) DecltypeType(e, DependentTy, 2805 QualType((DecltypeType*)Canon, 0)); 2806 } 2807 else { 2808 // Build a new, canonical typeof(expr) type. 2809 Canon = new (*this, TypeAlignment) DependentDecltypeType(*this, e); 2810 DependentDecltypeTypes.InsertNode(Canon, InsertPos); 2811 dt = Canon; 2812 } 2813 } else { 2814 QualType T = getDecltypeForExpr(e, *this); 2815 dt = new (*this, TypeAlignment) DecltypeType(e, T, getCanonicalType(T)); 2816 } 2817 Types.push_back(dt); 2818 return QualType(dt, 0); 2819} 2820 2821/// getUnaryTransformationType - We don't unique these, since the memory 2822/// savings are minimal and these are rare. 2823QualType ASTContext::getUnaryTransformType(QualType BaseType, 2824 QualType UnderlyingType, 2825 UnaryTransformType::UTTKind Kind) 2826 const { 2827 UnaryTransformType *Ty = 2828 new (*this, TypeAlignment) UnaryTransformType (BaseType, UnderlyingType, 2829 Kind, 2830 UnderlyingType->isDependentType() ? 2831 QualType() : UnderlyingType); 2832 Types.push_back(Ty); 2833 return QualType(Ty, 0); 2834} 2835 2836/// getAutoType - We only unique auto types after they've been deduced. 2837QualType ASTContext::getAutoType(QualType DeducedType) const { 2838 void *InsertPos = 0; 2839 if (!DeducedType.isNull()) { 2840 // Look in the folding set for an existing type. 2841 llvm::FoldingSetNodeID ID; 2842 AutoType::Profile(ID, DeducedType); 2843 if (AutoType *AT = AutoTypes.FindNodeOrInsertPos(ID, InsertPos)) 2844 return QualType(AT, 0); 2845 } 2846 2847 AutoType *AT = new (*this, TypeAlignment) AutoType(DeducedType); 2848 Types.push_back(AT); 2849 if (InsertPos) 2850 AutoTypes.InsertNode(AT, InsertPos); 2851 return QualType(AT, 0); 2852} 2853 2854/// getAutoDeductType - Get type pattern for deducing against 'auto'. 2855QualType ASTContext::getAutoDeductType() const { 2856 if (AutoDeductTy.isNull()) 2857 AutoDeductTy = getAutoType(QualType()); 2858 assert(!AutoDeductTy.isNull() && "can't build 'auto' pattern"); 2859 return AutoDeductTy; 2860} 2861 2862/// getAutoRRefDeductType - Get type pattern for deducing against 'auto &&'. 2863QualType ASTContext::getAutoRRefDeductType() const { 2864 if (AutoRRefDeductTy.isNull()) 2865 AutoRRefDeductTy = getRValueReferenceType(getAutoDeductType()); 2866 assert(!AutoRRefDeductTy.isNull() && "can't build 'auto &&' pattern"); 2867 return AutoRRefDeductTy; 2868} 2869 2870/// getTagDeclType - Return the unique reference to the type for the 2871/// specified TagDecl (struct/union/class/enum) decl. 2872QualType ASTContext::getTagDeclType(const TagDecl *Decl) const { 2873 assert (Decl); 2874 // FIXME: What is the design on getTagDeclType when it requires casting 2875 // away const? mutable? 2876 return getTypeDeclType(const_cast<TagDecl*>(Decl)); 2877} 2878 2879/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result 2880/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and 2881/// needs to agree with the definition in <stddef.h>. 2882CanQualType ASTContext::getSizeType() const { 2883 return getFromTargetType(Target.getSizeType()); 2884} 2885 2886/// getSignedWCharType - Return the type of "signed wchar_t". 2887/// Used when in C++, as a GCC extension. 2888QualType ASTContext::getSignedWCharType() const { 2889 // FIXME: derive from "Target" ? 2890 return WCharTy; 2891} 2892 2893/// getUnsignedWCharType - Return the type of "unsigned wchar_t". 2894/// Used when in C++, as a GCC extension. 2895QualType ASTContext::getUnsignedWCharType() const { 2896 // FIXME: derive from "Target" ? 2897 return UnsignedIntTy; 2898} 2899 2900/// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 2901/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 2902QualType ASTContext::getPointerDiffType() const { 2903 return getFromTargetType(Target.getPtrDiffType(0)); 2904} 2905 2906//===----------------------------------------------------------------------===// 2907// Type Operators 2908//===----------------------------------------------------------------------===// 2909 2910CanQualType ASTContext::getCanonicalParamType(QualType T) const { 2911 // Push qualifiers into arrays, and then discard any remaining 2912 // qualifiers. 2913 T = getCanonicalType(T); 2914 T = getVariableArrayDecayedType(T); 2915 const Type *Ty = T.getTypePtr(); 2916 QualType Result; 2917 if (isa<ArrayType>(Ty)) { 2918 Result = getArrayDecayedType(QualType(Ty,0)); 2919 } else if (isa<FunctionType>(Ty)) { 2920 Result = getPointerType(QualType(Ty, 0)); 2921 } else { 2922 Result = QualType(Ty, 0); 2923 } 2924 2925 return CanQualType::CreateUnsafe(Result); 2926} 2927 2928 2929QualType ASTContext::getUnqualifiedArrayType(QualType type, 2930 Qualifiers &quals) { 2931 SplitQualType splitType = type.getSplitUnqualifiedType(); 2932 2933 // FIXME: getSplitUnqualifiedType() actually walks all the way to 2934 // the unqualified desugared type and then drops it on the floor. 2935 // We then have to strip that sugar back off with 2936 // getUnqualifiedDesugaredType(), which is silly. 2937 const ArrayType *AT = 2938 dyn_cast<ArrayType>(splitType.first->getUnqualifiedDesugaredType()); 2939 2940 // If we don't have an array, just use the results in splitType. 2941 if (!AT) { 2942 quals = splitType.second; 2943 return QualType(splitType.first, 0); 2944 } 2945 2946 // Otherwise, recurse on the array's element type. 2947 QualType elementType = AT->getElementType(); 2948 QualType unqualElementType = getUnqualifiedArrayType(elementType, quals); 2949 2950 // If that didn't change the element type, AT has no qualifiers, so we 2951 // can just use the results in splitType. 2952 if (elementType == unqualElementType) { 2953 assert(quals.empty()); // from the recursive call 2954 quals = splitType.second; 2955 return QualType(splitType.first, 0); 2956 } 2957 2958 // Otherwise, add in the qualifiers from the outermost type, then 2959 // build the type back up. 2960 quals.addConsistentQualifiers(splitType.second); 2961 2962 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) { 2963 return getConstantArrayType(unqualElementType, CAT->getSize(), 2964 CAT->getSizeModifier(), 0); 2965 } 2966 2967 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) { 2968 return getIncompleteArrayType(unqualElementType, IAT->getSizeModifier(), 0); 2969 } 2970 2971 if (const VariableArrayType *VAT = dyn_cast<VariableArrayType>(AT)) { 2972 return getVariableArrayType(unqualElementType, 2973 VAT->getSizeExpr(), 2974 VAT->getSizeModifier(), 2975 VAT->getIndexTypeCVRQualifiers(), 2976 VAT->getBracketsRange()); 2977 } 2978 2979 const DependentSizedArrayType *DSAT = cast<DependentSizedArrayType>(AT); 2980 return getDependentSizedArrayType(unqualElementType, DSAT->getSizeExpr(), 2981 DSAT->getSizeModifier(), 0, 2982 SourceRange()); 2983} 2984 2985/// UnwrapSimilarPointerTypes - If T1 and T2 are pointer types that 2986/// may be similar (C++ 4.4), replaces T1 and T2 with the type that 2987/// they point to and return true. If T1 and T2 aren't pointer types 2988/// or pointer-to-member types, or if they are not similar at this 2989/// level, returns false and leaves T1 and T2 unchanged. Top-level 2990/// qualifiers on T1 and T2 are ignored. This function will typically 2991/// be called in a loop that successively "unwraps" pointer and 2992/// pointer-to-member types to compare them at each level. 2993bool ASTContext::UnwrapSimilarPointerTypes(QualType &T1, QualType &T2) { 2994 const PointerType *T1PtrType = T1->getAs<PointerType>(), 2995 *T2PtrType = T2->getAs<PointerType>(); 2996 if (T1PtrType && T2PtrType) { 2997 T1 = T1PtrType->getPointeeType(); 2998 T2 = T2PtrType->getPointeeType(); 2999 return true; 3000 } 3001 3002 const MemberPointerType *T1MPType = T1->getAs<MemberPointerType>(), 3003 *T2MPType = T2->getAs<MemberPointerType>(); 3004 if (T1MPType && T2MPType && 3005 hasSameUnqualifiedType(QualType(T1MPType->getClass(), 0), 3006 QualType(T2MPType->getClass(), 0))) { 3007 T1 = T1MPType->getPointeeType(); 3008 T2 = T2MPType->getPointeeType(); 3009 return true; 3010 } 3011 3012 if (getLangOptions().ObjC1) { 3013 const ObjCObjectPointerType *T1OPType = T1->getAs<ObjCObjectPointerType>(), 3014 *T2OPType = T2->getAs<ObjCObjectPointerType>(); 3015 if (T1OPType && T2OPType) { 3016 T1 = T1OPType->getPointeeType(); 3017 T2 = T2OPType->getPointeeType(); 3018 return true; 3019 } 3020 } 3021 3022 // FIXME: Block pointers, too? 3023 3024 return false; 3025} 3026 3027DeclarationNameInfo 3028ASTContext::getNameForTemplate(TemplateName Name, 3029 SourceLocation NameLoc) const { 3030 if (TemplateDecl *TD = Name.getAsTemplateDecl()) 3031 // DNInfo work in progress: CHECKME: what about DNLoc? 3032 return DeclarationNameInfo(TD->getDeclName(), NameLoc); 3033 3034 if (DependentTemplateName *DTN = Name.getAsDependentTemplateName()) { 3035 DeclarationName DName; 3036 if (DTN->isIdentifier()) { 3037 DName = DeclarationNames.getIdentifier(DTN->getIdentifier()); 3038 return DeclarationNameInfo(DName, NameLoc); 3039 } else { 3040 DName = DeclarationNames.getCXXOperatorName(DTN->getOperator()); 3041 // DNInfo work in progress: FIXME: source locations? 3042 DeclarationNameLoc DNLoc; 3043 DNLoc.CXXOperatorName.BeginOpNameLoc = SourceLocation().getRawEncoding(); 3044 DNLoc.CXXOperatorName.EndOpNameLoc = SourceLocation().getRawEncoding(); 3045 return DeclarationNameInfo(DName, NameLoc, DNLoc); 3046 } 3047 } 3048 3049 OverloadedTemplateStorage *Storage = Name.getAsOverloadedTemplate(); 3050 assert(Storage); 3051 // DNInfo work in progress: CHECKME: what about DNLoc? 3052 return DeclarationNameInfo((*Storage->begin())->getDeclName(), NameLoc); 3053} 3054 3055TemplateName ASTContext::getCanonicalTemplateName(TemplateName Name) const { 3056 if (TemplateDecl *Template = Name.getAsTemplateDecl()) { 3057 if (TemplateTemplateParmDecl *TTP 3058 = dyn_cast<TemplateTemplateParmDecl>(Template)) 3059 Template = getCanonicalTemplateTemplateParmDecl(TTP); 3060 3061 // The canonical template name is the canonical template declaration. 3062 return TemplateName(cast<TemplateDecl>(Template->getCanonicalDecl())); 3063 } 3064 3065 if (SubstTemplateTemplateParmPackStorage *SubstPack 3066 = Name.getAsSubstTemplateTemplateParmPack()) { 3067 TemplateTemplateParmDecl *CanonParam 3068 = getCanonicalTemplateTemplateParmDecl(SubstPack->getParameterPack()); 3069 TemplateArgument CanonArgPack 3070 = getCanonicalTemplateArgument(SubstPack->getArgumentPack()); 3071 return getSubstTemplateTemplateParmPack(CanonParam, CanonArgPack); 3072 } 3073 3074 assert(!Name.getAsOverloadedTemplate()); 3075 3076 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 3077 assert(DTN && "Non-dependent template names must refer to template decls."); 3078 return DTN->CanonicalTemplateName; 3079} 3080 3081bool ASTContext::hasSameTemplateName(TemplateName X, TemplateName Y) { 3082 X = getCanonicalTemplateName(X); 3083 Y = getCanonicalTemplateName(Y); 3084 return X.getAsVoidPointer() == Y.getAsVoidPointer(); 3085} 3086 3087TemplateArgument 3088ASTContext::getCanonicalTemplateArgument(const TemplateArgument &Arg) const { 3089 switch (Arg.getKind()) { 3090 case TemplateArgument::Null: 3091 return Arg; 3092 3093 case TemplateArgument::Expression: 3094 return Arg; 3095 3096 case TemplateArgument::Declaration: 3097 return TemplateArgument(Arg.getAsDecl()->getCanonicalDecl()); 3098 3099 case TemplateArgument::Template: 3100 return TemplateArgument(getCanonicalTemplateName(Arg.getAsTemplate())); 3101 3102 case TemplateArgument::TemplateExpansion: 3103 return TemplateArgument(getCanonicalTemplateName( 3104 Arg.getAsTemplateOrTemplatePattern()), 3105 Arg.getNumTemplateExpansions()); 3106 3107 case TemplateArgument::Integral: 3108 return TemplateArgument(*Arg.getAsIntegral(), 3109 getCanonicalType(Arg.getIntegralType())); 3110 3111 case TemplateArgument::Type: 3112 return TemplateArgument(getCanonicalType(Arg.getAsType())); 3113 3114 case TemplateArgument::Pack: { 3115 if (Arg.pack_size() == 0) 3116 return Arg; 3117 3118 TemplateArgument *CanonArgs 3119 = new (*this) TemplateArgument[Arg.pack_size()]; 3120 unsigned Idx = 0; 3121 for (TemplateArgument::pack_iterator A = Arg.pack_begin(), 3122 AEnd = Arg.pack_end(); 3123 A != AEnd; (void)++A, ++Idx) 3124 CanonArgs[Idx] = getCanonicalTemplateArgument(*A); 3125 3126 return TemplateArgument(CanonArgs, Arg.pack_size()); 3127 } 3128 } 3129 3130 // Silence GCC warning 3131 assert(false && "Unhandled template argument kind"); 3132 return TemplateArgument(); 3133} 3134 3135NestedNameSpecifier * 3136ASTContext::getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) const { 3137 if (!NNS) 3138 return 0; 3139 3140 switch (NNS->getKind()) { 3141 case NestedNameSpecifier::Identifier: 3142 // Canonicalize the prefix but keep the identifier the same. 3143 return NestedNameSpecifier::Create(*this, 3144 getCanonicalNestedNameSpecifier(NNS->getPrefix()), 3145 NNS->getAsIdentifier()); 3146 3147 case NestedNameSpecifier::Namespace: 3148 // A namespace is canonical; build a nested-name-specifier with 3149 // this namespace and no prefix. 3150 return NestedNameSpecifier::Create(*this, 0, 3151 NNS->getAsNamespace()->getOriginalNamespace()); 3152 3153 case NestedNameSpecifier::NamespaceAlias: 3154 // A namespace is canonical; build a nested-name-specifier with 3155 // this namespace and no prefix. 3156 return NestedNameSpecifier::Create(*this, 0, 3157 NNS->getAsNamespaceAlias()->getNamespace() 3158 ->getOriginalNamespace()); 3159 3160 case NestedNameSpecifier::TypeSpec: 3161 case NestedNameSpecifier::TypeSpecWithTemplate: { 3162 QualType T = getCanonicalType(QualType(NNS->getAsType(), 0)); 3163 3164 // If we have some kind of dependent-named type (e.g., "typename T::type"), 3165 // break it apart into its prefix and identifier, then reconsititute those 3166 // as the canonical nested-name-specifier. This is required to canonicalize 3167 // a dependent nested-name-specifier involving typedefs of dependent-name 3168 // types, e.g., 3169 // typedef typename T::type T1; 3170 // typedef typename T1::type T2; 3171 if (const DependentNameType *DNT = T->getAs<DependentNameType>()) { 3172 NestedNameSpecifier *Prefix 3173 = getCanonicalNestedNameSpecifier(DNT->getQualifier()); 3174 return NestedNameSpecifier::Create(*this, Prefix, 3175 const_cast<IdentifierInfo *>(DNT->getIdentifier())); 3176 } 3177 3178 // Do the same thing as above, but with dependent-named specializations. 3179 if (const DependentTemplateSpecializationType *DTST 3180 = T->getAs<DependentTemplateSpecializationType>()) { 3181 NestedNameSpecifier *Prefix 3182 = getCanonicalNestedNameSpecifier(DTST->getQualifier()); 3183 3184 T = getDependentTemplateSpecializationType(DTST->getKeyword(), 3185 Prefix, DTST->getIdentifier(), 3186 DTST->getNumArgs(), 3187 DTST->getArgs()); 3188 T = getCanonicalType(T); 3189 } 3190 3191 return NestedNameSpecifier::Create(*this, 0, false, 3192 const_cast<Type*>(T.getTypePtr())); 3193 } 3194 3195 case NestedNameSpecifier::Global: 3196 // The global specifier is canonical and unique. 3197 return NNS; 3198 } 3199 3200 // Required to silence a GCC warning 3201 return 0; 3202} 3203 3204 3205const ArrayType *ASTContext::getAsArrayType(QualType T) const { 3206 // Handle the non-qualified case efficiently. 3207 if (!T.hasLocalQualifiers()) { 3208 // Handle the common positive case fast. 3209 if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 3210 return AT; 3211 } 3212 3213 // Handle the common negative case fast. 3214 if (!isa<ArrayType>(T.getCanonicalType())) 3215 return 0; 3216 3217 // Apply any qualifiers from the array type to the element type. This 3218 // implements C99 6.7.3p8: "If the specification of an array type includes 3219 // any type qualifiers, the element type is so qualified, not the array type." 3220 3221 // If we get here, we either have type qualifiers on the type, or we have 3222 // sugar such as a typedef in the way. If we have type qualifiers on the type 3223 // we must propagate them down into the element type. 3224 3225 SplitQualType split = T.getSplitDesugaredType(); 3226 Qualifiers qs = split.second; 3227 3228 // If we have a simple case, just return now. 3229 const ArrayType *ATy = dyn_cast<ArrayType>(split.first); 3230 if (ATy == 0 || qs.empty()) 3231 return ATy; 3232 3233 // Otherwise, we have an array and we have qualifiers on it. Push the 3234 // qualifiers into the array element type and return a new array type. 3235 QualType NewEltTy = getQualifiedType(ATy->getElementType(), qs); 3236 3237 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy)) 3238 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(), 3239 CAT->getSizeModifier(), 3240 CAT->getIndexTypeCVRQualifiers())); 3241 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy)) 3242 return cast<ArrayType>(getIncompleteArrayType(NewEltTy, 3243 IAT->getSizeModifier(), 3244 IAT->getIndexTypeCVRQualifiers())); 3245 3246 if (const DependentSizedArrayType *DSAT 3247 = dyn_cast<DependentSizedArrayType>(ATy)) 3248 return cast<ArrayType>( 3249 getDependentSizedArrayType(NewEltTy, 3250 DSAT->getSizeExpr(), 3251 DSAT->getSizeModifier(), 3252 DSAT->getIndexTypeCVRQualifiers(), 3253 DSAT->getBracketsRange())); 3254 3255 const VariableArrayType *VAT = cast<VariableArrayType>(ATy); 3256 return cast<ArrayType>(getVariableArrayType(NewEltTy, 3257 VAT->getSizeExpr(), 3258 VAT->getSizeModifier(), 3259 VAT->getIndexTypeCVRQualifiers(), 3260 VAT->getBracketsRange())); 3261} 3262 3263/// getArrayDecayedType - Return the properly qualified result of decaying the 3264/// specified array type to a pointer. This operation is non-trivial when 3265/// handling typedefs etc. The canonical type of "T" must be an array type, 3266/// this returns a pointer to a properly qualified element of the array. 3267/// 3268/// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 3269QualType ASTContext::getArrayDecayedType(QualType Ty) const { 3270 // Get the element type with 'getAsArrayType' so that we don't lose any 3271 // typedefs in the element type of the array. This also handles propagation 3272 // of type qualifiers from the array type into the element type if present 3273 // (C99 6.7.3p8). 3274 const ArrayType *PrettyArrayType = getAsArrayType(Ty); 3275 assert(PrettyArrayType && "Not an array type!"); 3276 3277 QualType PtrTy = getPointerType(PrettyArrayType->getElementType()); 3278 3279 // int x[restrict 4] -> int *restrict 3280 return getQualifiedType(PtrTy, PrettyArrayType->getIndexTypeQualifiers()); 3281} 3282 3283QualType ASTContext::getBaseElementType(const ArrayType *array) const { 3284 return getBaseElementType(array->getElementType()); 3285} 3286 3287QualType ASTContext::getBaseElementType(QualType type) const { 3288 Qualifiers qs; 3289 while (true) { 3290 SplitQualType split = type.getSplitDesugaredType(); 3291 const ArrayType *array = split.first->getAsArrayTypeUnsafe(); 3292 if (!array) break; 3293 3294 type = array->getElementType(); 3295 qs.addConsistentQualifiers(split.second); 3296 } 3297 3298 return getQualifiedType(type, qs); 3299} 3300 3301/// getConstantArrayElementCount - Returns number of constant array elements. 3302uint64_t 3303ASTContext::getConstantArrayElementCount(const ConstantArrayType *CA) const { 3304 uint64_t ElementCount = 1; 3305 do { 3306 ElementCount *= CA->getSize().getZExtValue(); 3307 CA = dyn_cast<ConstantArrayType>(CA->getElementType()); 3308 } while (CA); 3309 return ElementCount; 3310} 3311 3312/// getFloatingRank - Return a relative rank for floating point types. 3313/// This routine will assert if passed a built-in type that isn't a float. 3314static FloatingRank getFloatingRank(QualType T) { 3315 if (const ComplexType *CT = T->getAs<ComplexType>()) 3316 return getFloatingRank(CT->getElementType()); 3317 3318 assert(T->getAs<BuiltinType>() && "getFloatingRank(): not a floating type"); 3319 switch (T->getAs<BuiltinType>()->getKind()) { 3320 default: assert(0 && "getFloatingRank(): not a floating type"); 3321 case BuiltinType::Float: return FloatRank; 3322 case BuiltinType::Double: return DoubleRank; 3323 case BuiltinType::LongDouble: return LongDoubleRank; 3324 } 3325} 3326 3327/// getFloatingTypeOfSizeWithinDomain - Returns a real floating 3328/// point or a complex type (based on typeDomain/typeSize). 3329/// 'typeDomain' is a real floating point or complex type. 3330/// 'typeSize' is a real floating point or complex type. 3331QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size, 3332 QualType Domain) const { 3333 FloatingRank EltRank = getFloatingRank(Size); 3334 if (Domain->isComplexType()) { 3335 switch (EltRank) { 3336 default: assert(0 && "getFloatingRank(): illegal value for rank"); 3337 case FloatRank: return FloatComplexTy; 3338 case DoubleRank: return DoubleComplexTy; 3339 case LongDoubleRank: return LongDoubleComplexTy; 3340 } 3341 } 3342 3343 assert(Domain->isRealFloatingType() && "Unknown domain!"); 3344 switch (EltRank) { 3345 default: assert(0 && "getFloatingRank(): illegal value for rank"); 3346 case FloatRank: return FloatTy; 3347 case DoubleRank: return DoubleTy; 3348 case LongDoubleRank: return LongDoubleTy; 3349 } 3350} 3351 3352/// getFloatingTypeOrder - Compare the rank of the two specified floating 3353/// point types, ignoring the domain of the type (i.e. 'double' == 3354/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 3355/// LHS < RHS, return -1. 3356int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) const { 3357 FloatingRank LHSR = getFloatingRank(LHS); 3358 FloatingRank RHSR = getFloatingRank(RHS); 3359 3360 if (LHSR == RHSR) 3361 return 0; 3362 if (LHSR > RHSR) 3363 return 1; 3364 return -1; 3365} 3366 3367/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This 3368/// routine will assert if passed a built-in type that isn't an integer or enum, 3369/// or if it is not canonicalized. 3370unsigned ASTContext::getIntegerRank(const Type *T) const { 3371 assert(T->isCanonicalUnqualified() && "T should be canonicalized"); 3372 if (const EnumType* ET = dyn_cast<EnumType>(T)) 3373 T = ET->getDecl()->getPromotionType().getTypePtr(); 3374 3375 if (T->isSpecificBuiltinType(BuiltinType::WChar_S) || 3376 T->isSpecificBuiltinType(BuiltinType::WChar_U)) 3377 T = getFromTargetType(Target.getWCharType()).getTypePtr(); 3378 3379 if (T->isSpecificBuiltinType(BuiltinType::Char16)) 3380 T = getFromTargetType(Target.getChar16Type()).getTypePtr(); 3381 3382 if (T->isSpecificBuiltinType(BuiltinType::Char32)) 3383 T = getFromTargetType(Target.getChar32Type()).getTypePtr(); 3384 3385 switch (cast<BuiltinType>(T)->getKind()) { 3386 default: assert(0 && "getIntegerRank(): not a built-in integer"); 3387 case BuiltinType::Bool: 3388 return 1 + (getIntWidth(BoolTy) << 3); 3389 case BuiltinType::Char_S: 3390 case BuiltinType::Char_U: 3391 case BuiltinType::SChar: 3392 case BuiltinType::UChar: 3393 return 2 + (getIntWidth(CharTy) << 3); 3394 case BuiltinType::Short: 3395 case BuiltinType::UShort: 3396 return 3 + (getIntWidth(ShortTy) << 3); 3397 case BuiltinType::Int: 3398 case BuiltinType::UInt: 3399 return 4 + (getIntWidth(IntTy) << 3); 3400 case BuiltinType::Long: 3401 case BuiltinType::ULong: 3402 return 5 + (getIntWidth(LongTy) << 3); 3403 case BuiltinType::LongLong: 3404 case BuiltinType::ULongLong: 3405 return 6 + (getIntWidth(LongLongTy) << 3); 3406 case BuiltinType::Int128: 3407 case BuiltinType::UInt128: 3408 return 7 + (getIntWidth(Int128Ty) << 3); 3409 } 3410} 3411 3412/// \brief Whether this is a promotable bitfield reference according 3413/// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 3414/// 3415/// \returns the type this bit-field will promote to, or NULL if no 3416/// promotion occurs. 3417QualType ASTContext::isPromotableBitField(Expr *E) const { 3418 if (E->isTypeDependent() || E->isValueDependent()) 3419 return QualType(); 3420 3421 FieldDecl *Field = E->getBitField(); 3422 if (!Field) 3423 return QualType(); 3424 3425 QualType FT = Field->getType(); 3426 3427 llvm::APSInt BitWidthAP = Field->getBitWidth()->EvaluateAsInt(*this); 3428 uint64_t BitWidth = BitWidthAP.getZExtValue(); 3429 uint64_t IntSize = getTypeSize(IntTy); 3430 // GCC extension compatibility: if the bit-field size is less than or equal 3431 // to the size of int, it gets promoted no matter what its type is. 3432 // For instance, unsigned long bf : 4 gets promoted to signed int. 3433 if (BitWidth < IntSize) 3434 return IntTy; 3435 3436 if (BitWidth == IntSize) 3437 return FT->isSignedIntegerType() ? IntTy : UnsignedIntTy; 3438 3439 // Types bigger than int are not subject to promotions, and therefore act 3440 // like the base type. 3441 // FIXME: This doesn't quite match what gcc does, but what gcc does here 3442 // is ridiculous. 3443 return QualType(); 3444} 3445 3446/// getPromotedIntegerType - Returns the type that Promotable will 3447/// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 3448/// integer type. 3449QualType ASTContext::getPromotedIntegerType(QualType Promotable) const { 3450 assert(!Promotable.isNull()); 3451 assert(Promotable->isPromotableIntegerType()); 3452 if (const EnumType *ET = Promotable->getAs<EnumType>()) 3453 return ET->getDecl()->getPromotionType(); 3454 if (Promotable->isSignedIntegerType()) 3455 return IntTy; 3456 uint64_t PromotableSize = getTypeSize(Promotable); 3457 uint64_t IntSize = getTypeSize(IntTy); 3458 assert(Promotable->isUnsignedIntegerType() && PromotableSize <= IntSize); 3459 return (PromotableSize != IntSize) ? IntTy : UnsignedIntTy; 3460} 3461 3462/// getIntegerTypeOrder - Returns the highest ranked integer type: 3463/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 3464/// LHS < RHS, return -1. 3465int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) const { 3466 const Type *LHSC = getCanonicalType(LHS).getTypePtr(); 3467 const Type *RHSC = getCanonicalType(RHS).getTypePtr(); 3468 if (LHSC == RHSC) return 0; 3469 3470 bool LHSUnsigned = LHSC->isUnsignedIntegerType(); 3471 bool RHSUnsigned = RHSC->isUnsignedIntegerType(); 3472 3473 unsigned LHSRank = getIntegerRank(LHSC); 3474 unsigned RHSRank = getIntegerRank(RHSC); 3475 3476 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned. 3477 if (LHSRank == RHSRank) return 0; 3478 return LHSRank > RHSRank ? 1 : -1; 3479 } 3480 3481 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa. 3482 if (LHSUnsigned) { 3483 // If the unsigned [LHS] type is larger, return it. 3484 if (LHSRank >= RHSRank) 3485 return 1; 3486 3487 // If the signed type can represent all values of the unsigned type, it 3488 // wins. Because we are dealing with 2's complement and types that are 3489 // powers of two larger than each other, this is always safe. 3490 return -1; 3491 } 3492 3493 // If the unsigned [RHS] type is larger, return it. 3494 if (RHSRank >= LHSRank) 3495 return -1; 3496 3497 // If the signed type can represent all values of the unsigned type, it 3498 // wins. Because we are dealing with 2's complement and types that are 3499 // powers of two larger than each other, this is always safe. 3500 return 1; 3501} 3502 3503static RecordDecl * 3504CreateRecordDecl(const ASTContext &Ctx, RecordDecl::TagKind TK, 3505 DeclContext *DC, IdentifierInfo *Id) { 3506 SourceLocation Loc; 3507 if (Ctx.getLangOptions().CPlusPlus) 3508 return CXXRecordDecl::Create(Ctx, TK, DC, Loc, Loc, Id); 3509 else 3510 return RecordDecl::Create(Ctx, TK, DC, Loc, Loc, Id); 3511} 3512 3513// getCFConstantStringType - Return the type used for constant CFStrings. 3514QualType ASTContext::getCFConstantStringType() const { 3515 if (!CFConstantStringTypeDecl) { 3516 CFConstantStringTypeDecl = 3517 CreateRecordDecl(*this, TTK_Struct, TUDecl, 3518 &Idents.get("NSConstantString")); 3519 CFConstantStringTypeDecl->startDefinition(); 3520 3521 QualType FieldTypes[4]; 3522 3523 // const int *isa; 3524 FieldTypes[0] = getPointerType(IntTy.withConst()); 3525 // int flags; 3526 FieldTypes[1] = IntTy; 3527 // const char *str; 3528 FieldTypes[2] = getPointerType(CharTy.withConst()); 3529 // long length; 3530 FieldTypes[3] = LongTy; 3531 3532 // Create fields 3533 for (unsigned i = 0; i < 4; ++i) { 3534 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl, 3535 SourceLocation(), 3536 SourceLocation(), 0, 3537 FieldTypes[i], /*TInfo=*/0, 3538 /*BitWidth=*/0, 3539 /*Mutable=*/false); 3540 Field->setAccess(AS_public); 3541 CFConstantStringTypeDecl->addDecl(Field); 3542 } 3543 3544 CFConstantStringTypeDecl->completeDefinition(); 3545 } 3546 3547 return getTagDeclType(CFConstantStringTypeDecl); 3548} 3549 3550void ASTContext::setCFConstantStringType(QualType T) { 3551 const RecordType *Rec = T->getAs<RecordType>(); 3552 assert(Rec && "Invalid CFConstantStringType"); 3553 CFConstantStringTypeDecl = Rec->getDecl(); 3554} 3555 3556// getNSConstantStringType - Return the type used for constant NSStrings. 3557QualType ASTContext::getNSConstantStringType() const { 3558 if (!NSConstantStringTypeDecl) { 3559 NSConstantStringTypeDecl = 3560 CreateRecordDecl(*this, TTK_Struct, TUDecl, 3561 &Idents.get("__builtin_NSString")); 3562 NSConstantStringTypeDecl->startDefinition(); 3563 3564 QualType FieldTypes[3]; 3565 3566 // const int *isa; 3567 FieldTypes[0] = getPointerType(IntTy.withConst()); 3568 // const char *str; 3569 FieldTypes[1] = getPointerType(CharTy.withConst()); 3570 // unsigned int length; 3571 FieldTypes[2] = UnsignedIntTy; 3572 3573 // Create fields 3574 for (unsigned i = 0; i < 3; ++i) { 3575 FieldDecl *Field = FieldDecl::Create(*this, NSConstantStringTypeDecl, 3576 SourceLocation(), 3577 SourceLocation(), 0, 3578 FieldTypes[i], /*TInfo=*/0, 3579 /*BitWidth=*/0, 3580 /*Mutable=*/false); 3581 Field->setAccess(AS_public); 3582 NSConstantStringTypeDecl->addDecl(Field); 3583 } 3584 3585 NSConstantStringTypeDecl->completeDefinition(); 3586 } 3587 3588 return getTagDeclType(NSConstantStringTypeDecl); 3589} 3590 3591void ASTContext::setNSConstantStringType(QualType T) { 3592 const RecordType *Rec = T->getAs<RecordType>(); 3593 assert(Rec && "Invalid NSConstantStringType"); 3594 NSConstantStringTypeDecl = Rec->getDecl(); 3595} 3596 3597QualType ASTContext::getObjCFastEnumerationStateType() const { 3598 if (!ObjCFastEnumerationStateTypeDecl) { 3599 ObjCFastEnumerationStateTypeDecl = 3600 CreateRecordDecl(*this, TTK_Struct, TUDecl, 3601 &Idents.get("__objcFastEnumerationState")); 3602 ObjCFastEnumerationStateTypeDecl->startDefinition(); 3603 3604 QualType FieldTypes[] = { 3605 UnsignedLongTy, 3606 getPointerType(ObjCIdTypedefType), 3607 getPointerType(UnsignedLongTy), 3608 getConstantArrayType(UnsignedLongTy, 3609 llvm::APInt(32, 5), ArrayType::Normal, 0) 3610 }; 3611 3612 for (size_t i = 0; i < 4; ++i) { 3613 FieldDecl *Field = FieldDecl::Create(*this, 3614 ObjCFastEnumerationStateTypeDecl, 3615 SourceLocation(), 3616 SourceLocation(), 0, 3617 FieldTypes[i], /*TInfo=*/0, 3618 /*BitWidth=*/0, 3619 /*Mutable=*/false); 3620 Field->setAccess(AS_public); 3621 ObjCFastEnumerationStateTypeDecl->addDecl(Field); 3622 } 3623 3624 ObjCFastEnumerationStateTypeDecl->completeDefinition(); 3625 } 3626 3627 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 3628} 3629 3630QualType ASTContext::getBlockDescriptorType() const { 3631 if (BlockDescriptorType) 3632 return getTagDeclType(BlockDescriptorType); 3633 3634 RecordDecl *T; 3635 // FIXME: Needs the FlagAppleBlock bit. 3636 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, 3637 &Idents.get("__block_descriptor")); 3638 T->startDefinition(); 3639 3640 QualType FieldTypes[] = { 3641 UnsignedLongTy, 3642 UnsignedLongTy, 3643 }; 3644 3645 const char *FieldNames[] = { 3646 "reserved", 3647 "Size" 3648 }; 3649 3650 for (size_t i = 0; i < 2; ++i) { 3651 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3652 SourceLocation(), 3653 &Idents.get(FieldNames[i]), 3654 FieldTypes[i], /*TInfo=*/0, 3655 /*BitWidth=*/0, 3656 /*Mutable=*/false); 3657 Field->setAccess(AS_public); 3658 T->addDecl(Field); 3659 } 3660 3661 T->completeDefinition(); 3662 3663 BlockDescriptorType = T; 3664 3665 return getTagDeclType(BlockDescriptorType); 3666} 3667 3668void ASTContext::setBlockDescriptorType(QualType T) { 3669 const RecordType *Rec = T->getAs<RecordType>(); 3670 assert(Rec && "Invalid BlockDescriptorType"); 3671 BlockDescriptorType = Rec->getDecl(); 3672} 3673 3674QualType ASTContext::getBlockDescriptorExtendedType() const { 3675 if (BlockDescriptorExtendedType) 3676 return getTagDeclType(BlockDescriptorExtendedType); 3677 3678 RecordDecl *T; 3679 // FIXME: Needs the FlagAppleBlock bit. 3680 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, 3681 &Idents.get("__block_descriptor_withcopydispose")); 3682 T->startDefinition(); 3683 3684 QualType FieldTypes[] = { 3685 UnsignedLongTy, 3686 UnsignedLongTy, 3687 getPointerType(VoidPtrTy), 3688 getPointerType(VoidPtrTy) 3689 }; 3690 3691 const char *FieldNames[] = { 3692 "reserved", 3693 "Size", 3694 "CopyFuncPtr", 3695 "DestroyFuncPtr" 3696 }; 3697 3698 for (size_t i = 0; i < 4; ++i) { 3699 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3700 SourceLocation(), 3701 &Idents.get(FieldNames[i]), 3702 FieldTypes[i], /*TInfo=*/0, 3703 /*BitWidth=*/0, 3704 /*Mutable=*/false); 3705 Field->setAccess(AS_public); 3706 T->addDecl(Field); 3707 } 3708 3709 T->completeDefinition(); 3710 3711 BlockDescriptorExtendedType = T; 3712 3713 return getTagDeclType(BlockDescriptorExtendedType); 3714} 3715 3716void ASTContext::setBlockDescriptorExtendedType(QualType T) { 3717 const RecordType *Rec = T->getAs<RecordType>(); 3718 assert(Rec && "Invalid BlockDescriptorType"); 3719 BlockDescriptorExtendedType = Rec->getDecl(); 3720} 3721 3722bool ASTContext::BlockRequiresCopying(QualType Ty) const { 3723 if (Ty->isBlockPointerType()) 3724 return true; 3725 if (isObjCNSObjectType(Ty)) 3726 return true; 3727 if (Ty->isObjCObjectPointerType()) 3728 return true; 3729 if (getLangOptions().CPlusPlus) { 3730 if (const RecordType *RT = Ty->getAs<RecordType>()) { 3731 CXXRecordDecl *RD = cast<CXXRecordDecl>(RT->getDecl()); 3732 return RD->hasConstCopyConstructor(); 3733 3734 } 3735 } 3736 return false; 3737} 3738 3739QualType 3740ASTContext::BuildByRefType(llvm::StringRef DeclName, QualType Ty) const { 3741 // type = struct __Block_byref_1_X { 3742 // void *__isa; 3743 // struct __Block_byref_1_X *__forwarding; 3744 // unsigned int __flags; 3745 // unsigned int __size; 3746 // void *__copy_helper; // as needed 3747 // void *__destroy_help // as needed 3748 // int X; 3749 // } * 3750 3751 bool HasCopyAndDispose = BlockRequiresCopying(Ty); 3752 3753 // FIXME: Move up 3754 llvm::SmallString<36> Name; 3755 llvm::raw_svector_ostream(Name) << "__Block_byref_" << 3756 ++UniqueBlockByRefTypeID << '_' << DeclName; 3757 RecordDecl *T; 3758 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, &Idents.get(Name.str())); 3759 T->startDefinition(); 3760 QualType Int32Ty = IntTy; 3761 assert(getIntWidth(IntTy) == 32 && "non-32bit int not supported"); 3762 QualType FieldTypes[] = { 3763 getPointerType(VoidPtrTy), 3764 getPointerType(getTagDeclType(T)), 3765 Int32Ty, 3766 Int32Ty, 3767 getPointerType(VoidPtrTy), 3768 getPointerType(VoidPtrTy), 3769 Ty 3770 }; 3771 3772 llvm::StringRef FieldNames[] = { 3773 "__isa", 3774 "__forwarding", 3775 "__flags", 3776 "__size", 3777 "__copy_helper", 3778 "__destroy_helper", 3779 DeclName, 3780 }; 3781 3782 for (size_t i = 0; i < 7; ++i) { 3783 if (!HasCopyAndDispose && i >=4 && i <= 5) 3784 continue; 3785 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3786 SourceLocation(), 3787 &Idents.get(FieldNames[i]), 3788 FieldTypes[i], /*TInfo=*/0, 3789 /*BitWidth=*/0, /*Mutable=*/false); 3790 Field->setAccess(AS_public); 3791 T->addDecl(Field); 3792 } 3793 3794 T->completeDefinition(); 3795 3796 return getPointerType(getTagDeclType(T)); 3797} 3798 3799void ASTContext::setObjCFastEnumerationStateType(QualType T) { 3800 const RecordType *Rec = T->getAs<RecordType>(); 3801 assert(Rec && "Invalid ObjCFAstEnumerationStateType"); 3802 ObjCFastEnumerationStateTypeDecl = Rec->getDecl(); 3803} 3804 3805// This returns true if a type has been typedefed to BOOL: 3806// typedef <type> BOOL; 3807static bool isTypeTypedefedAsBOOL(QualType T) { 3808 if (const TypedefType *TT = dyn_cast<TypedefType>(T)) 3809 if (IdentifierInfo *II = TT->getDecl()->getIdentifier()) 3810 return II->isStr("BOOL"); 3811 3812 return false; 3813} 3814 3815/// getObjCEncodingTypeSize returns size of type for objective-c encoding 3816/// purpose. 3817CharUnits ASTContext::getObjCEncodingTypeSize(QualType type) const { 3818 CharUnits sz = getTypeSizeInChars(type); 3819 3820 // Make all integer and enum types at least as large as an int 3821 if (sz.isPositive() && type->isIntegralOrEnumerationType()) 3822 sz = std::max(sz, getTypeSizeInChars(IntTy)); 3823 // Treat arrays as pointers, since that's how they're passed in. 3824 else if (type->isArrayType()) 3825 sz = getTypeSizeInChars(VoidPtrTy); 3826 return sz; 3827} 3828 3829static inline 3830std::string charUnitsToString(const CharUnits &CU) { 3831 return llvm::itostr(CU.getQuantity()); 3832} 3833 3834/// getObjCEncodingForBlock - Return the encoded type for this block 3835/// declaration. 3836std::string ASTContext::getObjCEncodingForBlock(const BlockExpr *Expr) const { 3837 std::string S; 3838 3839 const BlockDecl *Decl = Expr->getBlockDecl(); 3840 QualType BlockTy = 3841 Expr->getType()->getAs<BlockPointerType>()->getPointeeType(); 3842 // Encode result type. 3843 getObjCEncodingForType(BlockTy->getAs<FunctionType>()->getResultType(), S); 3844 // Compute size of all parameters. 3845 // Start with computing size of a pointer in number of bytes. 3846 // FIXME: There might(should) be a better way of doing this computation! 3847 SourceLocation Loc; 3848 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3849 CharUnits ParmOffset = PtrSize; 3850 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), 3851 E = Decl->param_end(); PI != E; ++PI) { 3852 QualType PType = (*PI)->getType(); 3853 CharUnits sz = getObjCEncodingTypeSize(PType); 3854 assert (sz.isPositive() && "BlockExpr - Incomplete param type"); 3855 ParmOffset += sz; 3856 } 3857 // Size of the argument frame 3858 S += charUnitsToString(ParmOffset); 3859 // Block pointer and offset. 3860 S += "@?0"; 3861 ParmOffset = PtrSize; 3862 3863 // Argument types. 3864 ParmOffset = PtrSize; 3865 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), E = 3866 Decl->param_end(); PI != E; ++PI) { 3867 ParmVarDecl *PVDecl = *PI; 3868 QualType PType = PVDecl->getOriginalType(); 3869 if (const ArrayType *AT = 3870 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3871 // Use array's original type only if it has known number of 3872 // elements. 3873 if (!isa<ConstantArrayType>(AT)) 3874 PType = PVDecl->getType(); 3875 } else if (PType->isFunctionType()) 3876 PType = PVDecl->getType(); 3877 getObjCEncodingForType(PType, S); 3878 S += charUnitsToString(ParmOffset); 3879 ParmOffset += getObjCEncodingTypeSize(PType); 3880 } 3881 3882 return S; 3883} 3884 3885void ASTContext::getObjCEncodingForFunctionDecl(const FunctionDecl *Decl, 3886 std::string& S) { 3887 // Encode result type. 3888 getObjCEncodingForType(Decl->getResultType(), S); 3889 CharUnits ParmOffset; 3890 // Compute size of all parameters. 3891 for (FunctionDecl::param_const_iterator PI = Decl->param_begin(), 3892 E = Decl->param_end(); PI != E; ++PI) { 3893 QualType PType = (*PI)->getType(); 3894 CharUnits sz = getObjCEncodingTypeSize(PType); 3895 assert (sz.isPositive() && 3896 "getObjCEncodingForMethodDecl - Incomplete param type"); 3897 ParmOffset += sz; 3898 } 3899 S += charUnitsToString(ParmOffset); 3900 ParmOffset = CharUnits::Zero(); 3901 3902 // Argument types. 3903 for (FunctionDecl::param_const_iterator PI = Decl->param_begin(), 3904 E = Decl->param_end(); PI != E; ++PI) { 3905 ParmVarDecl *PVDecl = *PI; 3906 QualType PType = PVDecl->getOriginalType(); 3907 if (const ArrayType *AT = 3908 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3909 // Use array's original type only if it has known number of 3910 // elements. 3911 if (!isa<ConstantArrayType>(AT)) 3912 PType = PVDecl->getType(); 3913 } else if (PType->isFunctionType()) 3914 PType = PVDecl->getType(); 3915 getObjCEncodingForType(PType, S); 3916 S += charUnitsToString(ParmOffset); 3917 ParmOffset += getObjCEncodingTypeSize(PType); 3918 } 3919} 3920 3921/// getObjCEncodingForMethodDecl - Return the encoded type for this method 3922/// declaration. 3923void ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, 3924 std::string& S) const { 3925 // FIXME: This is not very efficient. 3926 // Encode type qualifer, 'in', 'inout', etc. for the return type. 3927 getObjCEncodingForTypeQualifier(Decl->getObjCDeclQualifier(), S); 3928 // Encode result type. 3929 getObjCEncodingForType(Decl->getResultType(), S); 3930 // Compute size of all parameters. 3931 // Start with computing size of a pointer in number of bytes. 3932 // FIXME: There might(should) be a better way of doing this computation! 3933 SourceLocation Loc; 3934 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3935 // The first two arguments (self and _cmd) are pointers; account for 3936 // their size. 3937 CharUnits ParmOffset = 2 * PtrSize; 3938 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3939 E = Decl->sel_param_end(); PI != E; ++PI) { 3940 QualType PType = (*PI)->getType(); 3941 CharUnits sz = getObjCEncodingTypeSize(PType); 3942 assert (sz.isPositive() && 3943 "getObjCEncodingForMethodDecl - Incomplete param type"); 3944 ParmOffset += sz; 3945 } 3946 S += charUnitsToString(ParmOffset); 3947 S += "@0:"; 3948 S += charUnitsToString(PtrSize); 3949 3950 // Argument types. 3951 ParmOffset = 2 * PtrSize; 3952 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3953 E = Decl->sel_param_end(); PI != E; ++PI) { 3954 ParmVarDecl *PVDecl = *PI; 3955 QualType PType = PVDecl->getOriginalType(); 3956 if (const ArrayType *AT = 3957 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3958 // Use array's original type only if it has known number of 3959 // elements. 3960 if (!isa<ConstantArrayType>(AT)) 3961 PType = PVDecl->getType(); 3962 } else if (PType->isFunctionType()) 3963 PType = PVDecl->getType(); 3964 // Process argument qualifiers for user supplied arguments; such as, 3965 // 'in', 'inout', etc. 3966 getObjCEncodingForTypeQualifier(PVDecl->getObjCDeclQualifier(), S); 3967 getObjCEncodingForType(PType, S); 3968 S += charUnitsToString(ParmOffset); 3969 ParmOffset += getObjCEncodingTypeSize(PType); 3970 } 3971} 3972 3973/// getObjCEncodingForPropertyDecl - Return the encoded type for this 3974/// property declaration. If non-NULL, Container must be either an 3975/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be 3976/// NULL when getting encodings for protocol properties. 3977/// Property attributes are stored as a comma-delimited C string. The simple 3978/// attributes readonly and bycopy are encoded as single characters. The 3979/// parametrized attributes, getter=name, setter=name, and ivar=name, are 3980/// encoded as single characters, followed by an identifier. Property types 3981/// are also encoded as a parametrized attribute. The characters used to encode 3982/// these attributes are defined by the following enumeration: 3983/// @code 3984/// enum PropertyAttributes { 3985/// kPropertyReadOnly = 'R', // property is read-only. 3986/// kPropertyBycopy = 'C', // property is a copy of the value last assigned 3987/// kPropertyByref = '&', // property is a reference to the value last assigned 3988/// kPropertyDynamic = 'D', // property is dynamic 3989/// kPropertyGetter = 'G', // followed by getter selector name 3990/// kPropertySetter = 'S', // followed by setter selector name 3991/// kPropertyInstanceVariable = 'V' // followed by instance variable name 3992/// kPropertyType = 't' // followed by old-style type encoding. 3993/// kPropertyWeak = 'W' // 'weak' property 3994/// kPropertyStrong = 'P' // property GC'able 3995/// kPropertyNonAtomic = 'N' // property non-atomic 3996/// }; 3997/// @endcode 3998void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 3999 const Decl *Container, 4000 std::string& S) const { 4001 // Collect information from the property implementation decl(s). 4002 bool Dynamic = false; 4003 ObjCPropertyImplDecl *SynthesizePID = 0; 4004 4005 // FIXME: Duplicated code due to poor abstraction. 4006 if (Container) { 4007 if (const ObjCCategoryImplDecl *CID = 4008 dyn_cast<ObjCCategoryImplDecl>(Container)) { 4009 for (ObjCCategoryImplDecl::propimpl_iterator 4010 i = CID->propimpl_begin(), e = CID->propimpl_end(); 4011 i != e; ++i) { 4012 ObjCPropertyImplDecl *PID = *i; 4013 if (PID->getPropertyDecl() == PD) { 4014 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 4015 Dynamic = true; 4016 } else { 4017 SynthesizePID = PID; 4018 } 4019 } 4020 } 4021 } else { 4022 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container); 4023 for (ObjCCategoryImplDecl::propimpl_iterator 4024 i = OID->propimpl_begin(), e = OID->propimpl_end(); 4025 i != e; ++i) { 4026 ObjCPropertyImplDecl *PID = *i; 4027 if (PID->getPropertyDecl() == PD) { 4028 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 4029 Dynamic = true; 4030 } else { 4031 SynthesizePID = PID; 4032 } 4033 } 4034 } 4035 } 4036 } 4037 4038 // FIXME: This is not very efficient. 4039 S = "T"; 4040 4041 // Encode result type. 4042 // GCC has some special rules regarding encoding of properties which 4043 // closely resembles encoding of ivars. 4044 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, 0, 4045 true /* outermost type */, 4046 true /* encoding for property */); 4047 4048 if (PD->isReadOnly()) { 4049 S += ",R"; 4050 } else { 4051 switch (PD->getSetterKind()) { 4052 case ObjCPropertyDecl::Assign: break; 4053 case ObjCPropertyDecl::Copy: S += ",C"; break; 4054 case ObjCPropertyDecl::Retain: S += ",&"; break; 4055 } 4056 } 4057 4058 // It really isn't clear at all what this means, since properties 4059 // are "dynamic by default". 4060 if (Dynamic) 4061 S += ",D"; 4062 4063 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) 4064 S += ",N"; 4065 4066 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) { 4067 S += ",G"; 4068 S += PD->getGetterName().getAsString(); 4069 } 4070 4071 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) { 4072 S += ",S"; 4073 S += PD->getSetterName().getAsString(); 4074 } 4075 4076 if (SynthesizePID) { 4077 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl(); 4078 S += ",V"; 4079 S += OID->getNameAsString(); 4080 } 4081 4082 // FIXME: OBJCGC: weak & strong 4083} 4084 4085/// getLegacyIntegralTypeEncoding - 4086/// Another legacy compatibility encoding: 32-bit longs are encoded as 4087/// 'l' or 'L' , but not always. For typedefs, we need to use 4088/// 'i' or 'I' instead if encoding a struct field, or a pointer! 4089/// 4090void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const { 4091 if (isa<TypedefType>(PointeeTy.getTypePtr())) { 4092 if (const BuiltinType *BT = PointeeTy->getAs<BuiltinType>()) { 4093 if (BT->getKind() == BuiltinType::ULong && getIntWidth(PointeeTy) == 32) 4094 PointeeTy = UnsignedIntTy; 4095 else 4096 if (BT->getKind() == BuiltinType::Long && getIntWidth(PointeeTy) == 32) 4097 PointeeTy = IntTy; 4098 } 4099 } 4100} 4101 4102void ASTContext::getObjCEncodingForType(QualType T, std::string& S, 4103 const FieldDecl *Field) const { 4104 // We follow the behavior of gcc, expanding structures which are 4105 // directly pointed to, and expanding embedded structures. Note that 4106 // these rules are sufficient to prevent recursive encoding of the 4107 // same type. 4108 getObjCEncodingForTypeImpl(T, S, true, true, Field, 4109 true /* outermost type */); 4110} 4111 4112static char ObjCEncodingForPrimitiveKind(const ASTContext *C, QualType T) { 4113 switch (T->getAs<BuiltinType>()->getKind()) { 4114 default: assert(0 && "Unhandled builtin type kind"); 4115 case BuiltinType::Void: return 'v'; 4116 case BuiltinType::Bool: return 'B'; 4117 case BuiltinType::Char_U: 4118 case BuiltinType::UChar: return 'C'; 4119 case BuiltinType::UShort: return 'S'; 4120 case BuiltinType::UInt: return 'I'; 4121 case BuiltinType::ULong: 4122 return C->getIntWidth(T) == 32 ? 'L' : 'Q'; 4123 case BuiltinType::UInt128: return 'T'; 4124 case BuiltinType::ULongLong: return 'Q'; 4125 case BuiltinType::Char_S: 4126 case BuiltinType::SChar: return 'c'; 4127 case BuiltinType::Short: return 's'; 4128 case BuiltinType::WChar_S: 4129 case BuiltinType::WChar_U: 4130 case BuiltinType::Int: return 'i'; 4131 case BuiltinType::Long: 4132 return C->getIntWidth(T) == 32 ? 'l' : 'q'; 4133 case BuiltinType::LongLong: return 'q'; 4134 case BuiltinType::Int128: return 't'; 4135 case BuiltinType::Float: return 'f'; 4136 case BuiltinType::Double: return 'd'; 4137 case BuiltinType::LongDouble: return 'D'; 4138 } 4139} 4140 4141static void EncodeBitField(const ASTContext *Ctx, std::string& S, 4142 QualType T, const FieldDecl *FD) { 4143 const Expr *E = FD->getBitWidth(); 4144 assert(E && "bitfield width not there - getObjCEncodingForTypeImpl"); 4145 S += 'b'; 4146 // The NeXT runtime encodes bit fields as b followed by the number of bits. 4147 // The GNU runtime requires more information; bitfields are encoded as b, 4148 // then the offset (in bits) of the first element, then the type of the 4149 // bitfield, then the size in bits. For example, in this structure: 4150 // 4151 // struct 4152 // { 4153 // int integer; 4154 // int flags:2; 4155 // }; 4156 // On a 32-bit system, the encoding for flags would be b2 for the NeXT 4157 // runtime, but b32i2 for the GNU runtime. The reason for this extra 4158 // information is not especially sensible, but we're stuck with it for 4159 // compatibility with GCC, although providing it breaks anything that 4160 // actually uses runtime introspection and wants to work on both runtimes... 4161 if (!Ctx->getLangOptions().NeXTRuntime) { 4162 const RecordDecl *RD = FD->getParent(); 4163 const ASTRecordLayout &RL = Ctx->getASTRecordLayout(RD); 4164 // FIXME: This same linear search is also used in ExprConstant - it might 4165 // be better if the FieldDecl stored its offset. We'd be increasing the 4166 // size of the object slightly, but saving some time every time it is used. 4167 unsigned i = 0; 4168 for (RecordDecl::field_iterator Field = RD->field_begin(), 4169 FieldEnd = RD->field_end(); 4170 Field != FieldEnd; (void)++Field, ++i) { 4171 if (*Field == FD) 4172 break; 4173 } 4174 S += llvm::utostr(RL.getFieldOffset(i)); 4175 if (T->isEnumeralType()) 4176 S += 'i'; 4177 else 4178 S += ObjCEncodingForPrimitiveKind(Ctx, T); 4179 } 4180 unsigned N = E->EvaluateAsInt(*Ctx).getZExtValue(); 4181 S += llvm::utostr(N); 4182} 4183 4184// FIXME: Use SmallString for accumulating string. 4185void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S, 4186 bool ExpandPointedToStructures, 4187 bool ExpandStructures, 4188 const FieldDecl *FD, 4189 bool OutermostType, 4190 bool EncodingProperty, 4191 bool StructField) const { 4192 if (T->getAs<BuiltinType>()) { 4193 if (FD && FD->isBitField()) 4194 return EncodeBitField(this, S, T, FD); 4195 S += ObjCEncodingForPrimitiveKind(this, T); 4196 return; 4197 } 4198 4199 if (const ComplexType *CT = T->getAs<ComplexType>()) { 4200 S += 'j'; 4201 getObjCEncodingForTypeImpl(CT->getElementType(), S, false, false, 0, false, 4202 false); 4203 return; 4204 } 4205 4206 // encoding for pointer or r3eference types. 4207 QualType PointeeTy; 4208 if (const PointerType *PT = T->getAs<PointerType>()) { 4209 if (PT->isObjCSelType()) { 4210 S += ':'; 4211 return; 4212 } 4213 PointeeTy = PT->getPointeeType(); 4214 } 4215 else if (const ReferenceType *RT = T->getAs<ReferenceType>()) 4216 PointeeTy = RT->getPointeeType(); 4217 if (!PointeeTy.isNull()) { 4218 bool isReadOnly = false; 4219 // For historical/compatibility reasons, the read-only qualifier of the 4220 // pointee gets emitted _before_ the '^'. The read-only qualifier of 4221 // the pointer itself gets ignored, _unless_ we are looking at a typedef! 4222 // Also, do not emit the 'r' for anything but the outermost type! 4223 if (isa<TypedefType>(T.getTypePtr())) { 4224 if (OutermostType && T.isConstQualified()) { 4225 isReadOnly = true; 4226 S += 'r'; 4227 } 4228 } else if (OutermostType) { 4229 QualType P = PointeeTy; 4230 while (P->getAs<PointerType>()) 4231 P = P->getAs<PointerType>()->getPointeeType(); 4232 if (P.isConstQualified()) { 4233 isReadOnly = true; 4234 S += 'r'; 4235 } 4236 } 4237 if (isReadOnly) { 4238 // Another legacy compatibility encoding. Some ObjC qualifier and type 4239 // combinations need to be rearranged. 4240 // Rewrite "in const" from "nr" to "rn" 4241 if (llvm::StringRef(S).endswith("nr")) 4242 S.replace(S.end()-2, S.end(), "rn"); 4243 } 4244 4245 if (PointeeTy->isCharType()) { 4246 // char pointer types should be encoded as '*' unless it is a 4247 // type that has been typedef'd to 'BOOL'. 4248 if (!isTypeTypedefedAsBOOL(PointeeTy)) { 4249 S += '*'; 4250 return; 4251 } 4252 } else if (const RecordType *RTy = PointeeTy->getAs<RecordType>()) { 4253 // GCC binary compat: Need to convert "struct objc_class *" to "#". 4254 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_class")) { 4255 S += '#'; 4256 return; 4257 } 4258 // GCC binary compat: Need to convert "struct objc_object *" to "@". 4259 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_object")) { 4260 S += '@'; 4261 return; 4262 } 4263 // fall through... 4264 } 4265 S += '^'; 4266 getLegacyIntegralTypeEncoding(PointeeTy); 4267 4268 getObjCEncodingForTypeImpl(PointeeTy, S, false, ExpandPointedToStructures, 4269 NULL); 4270 return; 4271 } 4272 4273 if (const ArrayType *AT = 4274 // Ignore type qualifiers etc. 4275 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) { 4276 if (isa<IncompleteArrayType>(AT) && !StructField) { 4277 // Incomplete arrays are encoded as a pointer to the array element. 4278 S += '^'; 4279 4280 getObjCEncodingForTypeImpl(AT->getElementType(), S, 4281 false, ExpandStructures, FD); 4282 } else { 4283 S += '['; 4284 4285 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) { 4286 if (getTypeSize(CAT->getElementType()) == 0) 4287 S += '0'; 4288 else 4289 S += llvm::utostr(CAT->getSize().getZExtValue()); 4290 } else { 4291 //Variable length arrays are encoded as a regular array with 0 elements. 4292 assert((isa<VariableArrayType>(AT) || isa<IncompleteArrayType>(AT)) && 4293 "Unknown array type!"); 4294 S += '0'; 4295 } 4296 4297 getObjCEncodingForTypeImpl(AT->getElementType(), S, 4298 false, ExpandStructures, FD); 4299 S += ']'; 4300 } 4301 return; 4302 } 4303 4304 if (T->getAs<FunctionType>()) { 4305 S += '?'; 4306 return; 4307 } 4308 4309 if (const RecordType *RTy = T->getAs<RecordType>()) { 4310 RecordDecl *RDecl = RTy->getDecl(); 4311 S += RDecl->isUnion() ? '(' : '{'; 4312 // Anonymous structures print as '?' 4313 if (const IdentifierInfo *II = RDecl->getIdentifier()) { 4314 S += II->getName(); 4315 if (ClassTemplateSpecializationDecl *Spec 4316 = dyn_cast<ClassTemplateSpecializationDecl>(RDecl)) { 4317 const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs(); 4318 std::string TemplateArgsStr 4319 = TemplateSpecializationType::PrintTemplateArgumentList( 4320 TemplateArgs.data(), 4321 TemplateArgs.size(), 4322 (*this).PrintingPolicy); 4323 4324 S += TemplateArgsStr; 4325 } 4326 } else { 4327 S += '?'; 4328 } 4329 if (ExpandStructures) { 4330 S += '='; 4331 if (!RDecl->isUnion()) { 4332 getObjCEncodingForStructureImpl(RDecl, S, FD); 4333 } else { 4334 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 4335 FieldEnd = RDecl->field_end(); 4336 Field != FieldEnd; ++Field) { 4337 if (FD) { 4338 S += '"'; 4339 S += Field->getNameAsString(); 4340 S += '"'; 4341 } 4342 4343 // Special case bit-fields. 4344 if (Field->isBitField()) { 4345 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, 4346 (*Field)); 4347 } else { 4348 QualType qt = Field->getType(); 4349 getLegacyIntegralTypeEncoding(qt); 4350 getObjCEncodingForTypeImpl(qt, S, false, true, 4351 FD, /*OutermostType*/false, 4352 /*EncodingProperty*/false, 4353 /*StructField*/true); 4354 } 4355 } 4356 } 4357 } 4358 S += RDecl->isUnion() ? ')' : '}'; 4359 return; 4360 } 4361 4362 if (T->isEnumeralType()) { 4363 if (FD && FD->isBitField()) 4364 EncodeBitField(this, S, T, FD); 4365 else 4366 S += 'i'; 4367 return; 4368 } 4369 4370 if (T->isBlockPointerType()) { 4371 S += "@?"; // Unlike a pointer-to-function, which is "^?". 4372 return; 4373 } 4374 4375 // Ignore protocol qualifiers when mangling at this level. 4376 if (const ObjCObjectType *OT = T->getAs<ObjCObjectType>()) 4377 T = OT->getBaseType(); 4378 4379 if (const ObjCInterfaceType *OIT = T->getAs<ObjCInterfaceType>()) { 4380 // @encode(class_name) 4381 ObjCInterfaceDecl *OI = OIT->getDecl(); 4382 S += '{'; 4383 const IdentifierInfo *II = OI->getIdentifier(); 4384 S += II->getName(); 4385 S += '='; 4386 llvm::SmallVector<ObjCIvarDecl*, 32> Ivars; 4387 DeepCollectObjCIvars(OI, true, Ivars); 4388 for (unsigned i = 0, e = Ivars.size(); i != e; ++i) { 4389 FieldDecl *Field = cast<FieldDecl>(Ivars[i]); 4390 if (Field->isBitField()) 4391 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, Field); 4392 else 4393 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, FD); 4394 } 4395 S += '}'; 4396 return; 4397 } 4398 4399 if (const ObjCObjectPointerType *OPT = T->getAs<ObjCObjectPointerType>()) { 4400 if (OPT->isObjCIdType()) { 4401 S += '@'; 4402 return; 4403 } 4404 4405 if (OPT->isObjCClassType() || OPT->isObjCQualifiedClassType()) { 4406 // FIXME: Consider if we need to output qualifiers for 'Class<p>'. 4407 // Since this is a binary compatibility issue, need to consult with runtime 4408 // folks. Fortunately, this is a *very* obsure construct. 4409 S += '#'; 4410 return; 4411 } 4412 4413 if (OPT->isObjCQualifiedIdType()) { 4414 getObjCEncodingForTypeImpl(getObjCIdType(), S, 4415 ExpandPointedToStructures, 4416 ExpandStructures, FD); 4417 if (FD || EncodingProperty) { 4418 // Note that we do extended encoding of protocol qualifer list 4419 // Only when doing ivar or property encoding. 4420 S += '"'; 4421 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 4422 E = OPT->qual_end(); I != E; ++I) { 4423 S += '<'; 4424 S += (*I)->getNameAsString(); 4425 S += '>'; 4426 } 4427 S += '"'; 4428 } 4429 return; 4430 } 4431 4432 QualType PointeeTy = OPT->getPointeeType(); 4433 if (!EncodingProperty && 4434 isa<TypedefType>(PointeeTy.getTypePtr())) { 4435 // Another historical/compatibility reason. 4436 // We encode the underlying type which comes out as 4437 // {...}; 4438 S += '^'; 4439 getObjCEncodingForTypeImpl(PointeeTy, S, 4440 false, ExpandPointedToStructures, 4441 NULL); 4442 return; 4443 } 4444 4445 S += '@'; 4446 if (OPT->getInterfaceDecl() && (FD || EncodingProperty)) { 4447 S += '"'; 4448 S += OPT->getInterfaceDecl()->getIdentifier()->getName(); 4449 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 4450 E = OPT->qual_end(); I != E; ++I) { 4451 S += '<'; 4452 S += (*I)->getNameAsString(); 4453 S += '>'; 4454 } 4455 S += '"'; 4456 } 4457 return; 4458 } 4459 4460 // gcc just blithely ignores member pointers. 4461 // TODO: maybe there should be a mangling for these 4462 if (T->getAs<MemberPointerType>()) 4463 return; 4464 4465 if (T->isVectorType()) { 4466 // This matches gcc's encoding, even though technically it is 4467 // insufficient. 4468 // FIXME. We should do a better job than gcc. 4469 return; 4470 } 4471 4472 assert(0 && "@encode for type not implemented!"); 4473} 4474 4475void ASTContext::getObjCEncodingForStructureImpl(RecordDecl *RDecl, 4476 std::string &S, 4477 const FieldDecl *FD, 4478 bool includeVBases) const { 4479 assert(RDecl && "Expected non-null RecordDecl"); 4480 assert(!RDecl->isUnion() && "Should not be called for unions"); 4481 if (!RDecl->getDefinition()) 4482 return; 4483 4484 CXXRecordDecl *CXXRec = dyn_cast<CXXRecordDecl>(RDecl); 4485 std::multimap<uint64_t, NamedDecl *> FieldOrBaseOffsets; 4486 const ASTRecordLayout &layout = getASTRecordLayout(RDecl); 4487 4488 if (CXXRec) { 4489 for (CXXRecordDecl::base_class_iterator 4490 BI = CXXRec->bases_begin(), 4491 BE = CXXRec->bases_end(); BI != BE; ++BI) { 4492 if (!BI->isVirtual()) { 4493 CXXRecordDecl *base = BI->getType()->getAsCXXRecordDecl(); 4494 uint64_t offs = layout.getBaseClassOffsetInBits(base); 4495 FieldOrBaseOffsets.insert(FieldOrBaseOffsets.upper_bound(offs), 4496 std::make_pair(offs, base)); 4497 } 4498 } 4499 } 4500 4501 unsigned i = 0; 4502 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 4503 FieldEnd = RDecl->field_end(); 4504 Field != FieldEnd; ++Field, ++i) { 4505 uint64_t offs = layout.getFieldOffset(i); 4506 FieldOrBaseOffsets.insert(FieldOrBaseOffsets.upper_bound(offs), 4507 std::make_pair(offs, *Field)); 4508 } 4509 4510 if (CXXRec && includeVBases) { 4511 for (CXXRecordDecl::base_class_iterator 4512 BI = CXXRec->vbases_begin(), 4513 BE = CXXRec->vbases_end(); BI != BE; ++BI) { 4514 CXXRecordDecl *base = BI->getType()->getAsCXXRecordDecl(); 4515 uint64_t offs = layout.getVBaseClassOffsetInBits(base); 4516 FieldOrBaseOffsets.insert(FieldOrBaseOffsets.upper_bound(offs), 4517 std::make_pair(offs, base)); 4518 } 4519 } 4520 4521 CharUnits size; 4522 if (CXXRec) { 4523 size = includeVBases ? layout.getSize() : layout.getNonVirtualSize(); 4524 } else { 4525 size = layout.getSize(); 4526 } 4527 4528 uint64_t CurOffs = 0; 4529 std::multimap<uint64_t, NamedDecl *>::iterator 4530 CurLayObj = FieldOrBaseOffsets.begin(); 4531 4532 if (CurLayObj != FieldOrBaseOffsets.end() && CurLayObj->first != 0) { 4533 assert(CXXRec && CXXRec->isDynamicClass() && 4534 "Offset 0 was empty but no VTable ?"); 4535 if (FD) { 4536 S += "\"_vptr$"; 4537 std::string recname = CXXRec->getNameAsString(); 4538 if (recname.empty()) recname = "?"; 4539 S += recname; 4540 S += '"'; 4541 } 4542 S += "^^?"; 4543 CurOffs += getTypeSize(VoidPtrTy); 4544 } 4545 4546 if (!RDecl->hasFlexibleArrayMember()) { 4547 // Mark the end of the structure. 4548 uint64_t offs = toBits(size); 4549 FieldOrBaseOffsets.insert(FieldOrBaseOffsets.upper_bound(offs), 4550 std::make_pair(offs, (NamedDecl*)0)); 4551 } 4552 4553 for (; CurLayObj != FieldOrBaseOffsets.end(); ++CurLayObj) { 4554 assert(CurOffs <= CurLayObj->first); 4555 4556 if (CurOffs < CurLayObj->first) { 4557 uint64_t padding = CurLayObj->first - CurOffs; 4558 // FIXME: There doesn't seem to be a way to indicate in the encoding that 4559 // packing/alignment of members is different that normal, in which case 4560 // the encoding will be out-of-sync with the real layout. 4561 // If the runtime switches to just consider the size of types without 4562 // taking into account alignment, we could make padding explicit in the 4563 // encoding (e.g. using arrays of chars). The encoding strings would be 4564 // longer then though. 4565 CurOffs += padding; 4566 } 4567 4568 NamedDecl *dcl = CurLayObj->second; 4569 if (dcl == 0) 4570 break; // reached end of structure. 4571 4572 if (CXXRecordDecl *base = dyn_cast<CXXRecordDecl>(dcl)) { 4573 // We expand the bases without their virtual bases since those are going 4574 // in the initial structure. Note that this differs from gcc which 4575 // expands virtual bases each time one is encountered in the hierarchy, 4576 // making the encoding type bigger than it really is. 4577 getObjCEncodingForStructureImpl(base, S, FD, /*includeVBases*/false); 4578 if (!base->isEmpty()) 4579 CurOffs += toBits(getASTRecordLayout(base).getNonVirtualSize()); 4580 } else { 4581 FieldDecl *field = cast<FieldDecl>(dcl); 4582 if (FD) { 4583 S += '"'; 4584 S += field->getNameAsString(); 4585 S += '"'; 4586 } 4587 4588 if (field->isBitField()) { 4589 EncodeBitField(this, S, field->getType(), field); 4590 CurOffs += field->getBitWidth()->EvaluateAsInt(*this).getZExtValue(); 4591 } else { 4592 QualType qt = field->getType(); 4593 getLegacyIntegralTypeEncoding(qt); 4594 getObjCEncodingForTypeImpl(qt, S, false, true, FD, 4595 /*OutermostType*/false, 4596 /*EncodingProperty*/false, 4597 /*StructField*/true); 4598 CurOffs += getTypeSize(field->getType()); 4599 } 4600 } 4601 } 4602} 4603 4604void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 4605 std::string& S) const { 4606 if (QT & Decl::OBJC_TQ_In) 4607 S += 'n'; 4608 if (QT & Decl::OBJC_TQ_Inout) 4609 S += 'N'; 4610 if (QT & Decl::OBJC_TQ_Out) 4611 S += 'o'; 4612 if (QT & Decl::OBJC_TQ_Bycopy) 4613 S += 'O'; 4614 if (QT & Decl::OBJC_TQ_Byref) 4615 S += 'R'; 4616 if (QT & Decl::OBJC_TQ_Oneway) 4617 S += 'V'; 4618} 4619 4620void ASTContext::setBuiltinVaListType(QualType T) { 4621 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!"); 4622 4623 BuiltinVaListType = T; 4624} 4625 4626void ASTContext::setObjCIdType(QualType T) { 4627 ObjCIdTypedefType = T; 4628} 4629 4630void ASTContext::setObjCSelType(QualType T) { 4631 ObjCSelTypedefType = T; 4632} 4633 4634void ASTContext::setObjCProtoType(QualType QT) { 4635 ObjCProtoType = QT; 4636} 4637 4638void ASTContext::setObjCClassType(QualType T) { 4639 ObjCClassTypedefType = T; 4640} 4641 4642void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) { 4643 assert(ObjCConstantStringType.isNull() && 4644 "'NSConstantString' type already set!"); 4645 4646 ObjCConstantStringType = getObjCInterfaceType(Decl); 4647} 4648 4649/// \brief Retrieve the template name that corresponds to a non-empty 4650/// lookup. 4651TemplateName 4652ASTContext::getOverloadedTemplateName(UnresolvedSetIterator Begin, 4653 UnresolvedSetIterator End) const { 4654 unsigned size = End - Begin; 4655 assert(size > 1 && "set is not overloaded!"); 4656 4657 void *memory = Allocate(sizeof(OverloadedTemplateStorage) + 4658 size * sizeof(FunctionTemplateDecl*)); 4659 OverloadedTemplateStorage *OT = new(memory) OverloadedTemplateStorage(size); 4660 4661 NamedDecl **Storage = OT->getStorage(); 4662 for (UnresolvedSetIterator I = Begin; I != End; ++I) { 4663 NamedDecl *D = *I; 4664 assert(isa<FunctionTemplateDecl>(D) || 4665 (isa<UsingShadowDecl>(D) && 4666 isa<FunctionTemplateDecl>(D->getUnderlyingDecl()))); 4667 *Storage++ = D; 4668 } 4669 4670 return TemplateName(OT); 4671} 4672 4673/// \brief Retrieve the template name that represents a qualified 4674/// template name such as \c std::vector. 4675TemplateName 4676ASTContext::getQualifiedTemplateName(NestedNameSpecifier *NNS, 4677 bool TemplateKeyword, 4678 TemplateDecl *Template) const { 4679 assert(NNS && "Missing nested-name-specifier in qualified template name"); 4680 4681 // FIXME: Canonicalization? 4682 llvm::FoldingSetNodeID ID; 4683 QualifiedTemplateName::Profile(ID, NNS, TemplateKeyword, Template); 4684 4685 void *InsertPos = 0; 4686 QualifiedTemplateName *QTN = 4687 QualifiedTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4688 if (!QTN) { 4689 QTN = new (*this,4) QualifiedTemplateName(NNS, TemplateKeyword, Template); 4690 QualifiedTemplateNames.InsertNode(QTN, InsertPos); 4691 } 4692 4693 return TemplateName(QTN); 4694} 4695 4696/// \brief Retrieve the template name that represents a dependent 4697/// template name such as \c MetaFun::template apply. 4698TemplateName 4699ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 4700 const IdentifierInfo *Name) const { 4701 assert((!NNS || NNS->isDependent()) && 4702 "Nested name specifier must be dependent"); 4703 4704 llvm::FoldingSetNodeID ID; 4705 DependentTemplateName::Profile(ID, NNS, Name); 4706 4707 void *InsertPos = 0; 4708 DependentTemplateName *QTN = 4709 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4710 4711 if (QTN) 4712 return TemplateName(QTN); 4713 4714 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 4715 if (CanonNNS == NNS) { 4716 QTN = new (*this,4) DependentTemplateName(NNS, Name); 4717 } else { 4718 TemplateName Canon = getDependentTemplateName(CanonNNS, Name); 4719 QTN = new (*this,4) DependentTemplateName(NNS, Name, Canon); 4720 DependentTemplateName *CheckQTN = 4721 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4722 assert(!CheckQTN && "Dependent type name canonicalization broken"); 4723 (void)CheckQTN; 4724 } 4725 4726 DependentTemplateNames.InsertNode(QTN, InsertPos); 4727 return TemplateName(QTN); 4728} 4729 4730/// \brief Retrieve the template name that represents a dependent 4731/// template name such as \c MetaFun::template operator+. 4732TemplateName 4733ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 4734 OverloadedOperatorKind Operator) const { 4735 assert((!NNS || NNS->isDependent()) && 4736 "Nested name specifier must be dependent"); 4737 4738 llvm::FoldingSetNodeID ID; 4739 DependentTemplateName::Profile(ID, NNS, Operator); 4740 4741 void *InsertPos = 0; 4742 DependentTemplateName *QTN 4743 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4744 4745 if (QTN) 4746 return TemplateName(QTN); 4747 4748 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 4749 if (CanonNNS == NNS) { 4750 QTN = new (*this,4) DependentTemplateName(NNS, Operator); 4751 } else { 4752 TemplateName Canon = getDependentTemplateName(CanonNNS, Operator); 4753 QTN = new (*this,4) DependentTemplateName(NNS, Operator, Canon); 4754 4755 DependentTemplateName *CheckQTN 4756 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4757 assert(!CheckQTN && "Dependent template name canonicalization broken"); 4758 (void)CheckQTN; 4759 } 4760 4761 DependentTemplateNames.InsertNode(QTN, InsertPos); 4762 return TemplateName(QTN); 4763} 4764 4765TemplateName 4766ASTContext::getSubstTemplateTemplateParmPack(TemplateTemplateParmDecl *Param, 4767 const TemplateArgument &ArgPack) const { 4768 ASTContext &Self = const_cast<ASTContext &>(*this); 4769 llvm::FoldingSetNodeID ID; 4770 SubstTemplateTemplateParmPackStorage::Profile(ID, Self, Param, ArgPack); 4771 4772 void *InsertPos = 0; 4773 SubstTemplateTemplateParmPackStorage *Subst 4774 = SubstTemplateTemplateParmPacks.FindNodeOrInsertPos(ID, InsertPos); 4775 4776 if (!Subst) { 4777 Subst = new (*this) SubstTemplateTemplateParmPackStorage(Self, Param, 4778 ArgPack.pack_size(), 4779 ArgPack.pack_begin()); 4780 SubstTemplateTemplateParmPacks.InsertNode(Subst, InsertPos); 4781 } 4782 4783 return TemplateName(Subst); 4784} 4785 4786/// getFromTargetType - Given one of the integer types provided by 4787/// TargetInfo, produce the corresponding type. The unsigned @p Type 4788/// is actually a value of type @c TargetInfo::IntType. 4789CanQualType ASTContext::getFromTargetType(unsigned Type) const { 4790 switch (Type) { 4791 case TargetInfo::NoInt: return CanQualType(); 4792 case TargetInfo::SignedShort: return ShortTy; 4793 case TargetInfo::UnsignedShort: return UnsignedShortTy; 4794 case TargetInfo::SignedInt: return IntTy; 4795 case TargetInfo::UnsignedInt: return UnsignedIntTy; 4796 case TargetInfo::SignedLong: return LongTy; 4797 case TargetInfo::UnsignedLong: return UnsignedLongTy; 4798 case TargetInfo::SignedLongLong: return LongLongTy; 4799 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy; 4800 } 4801 4802 assert(false && "Unhandled TargetInfo::IntType value"); 4803 return CanQualType(); 4804} 4805 4806//===----------------------------------------------------------------------===// 4807// Type Predicates. 4808//===----------------------------------------------------------------------===// 4809 4810/// isObjCNSObjectType - Return true if this is an NSObject object using 4811/// NSObject attribute on a c-style pointer type. 4812/// FIXME - Make it work directly on types. 4813/// FIXME: Move to Type. 4814/// 4815bool ASTContext::isObjCNSObjectType(QualType Ty) const { 4816 if (const TypedefType *TDT = dyn_cast<TypedefType>(Ty)) { 4817 if (TypedefNameDecl *TD = TDT->getDecl()) 4818 if (TD->getAttr<ObjCNSObjectAttr>()) 4819 return true; 4820 } 4821 return false; 4822} 4823 4824/// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 4825/// garbage collection attribute. 4826/// 4827Qualifiers::GC ASTContext::getObjCGCAttrKind(QualType Ty) const { 4828 if (getLangOptions().getGCMode() == LangOptions::NonGC) 4829 return Qualifiers::GCNone; 4830 4831 assert(getLangOptions().ObjC1); 4832 Qualifiers::GC GCAttrs = Ty.getObjCGCAttr(); 4833 4834 // Default behaviour under objective-C's gc is for ObjC pointers 4835 // (or pointers to them) be treated as though they were declared 4836 // as __strong. 4837 if (GCAttrs == Qualifiers::GCNone) { 4838 if (Ty->isObjCObjectPointerType() || Ty->isBlockPointerType()) 4839 return Qualifiers::Strong; 4840 else if (Ty->isPointerType()) 4841 return getObjCGCAttrKind(Ty->getAs<PointerType>()->getPointeeType()); 4842 } else { 4843 // It's not valid to set GC attributes on anything that isn't a 4844 // pointer. 4845#ifndef NDEBUG 4846 QualType CT = Ty->getCanonicalTypeInternal(); 4847 while (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 4848 CT = AT->getElementType(); 4849 assert(CT->isAnyPointerType() || CT->isBlockPointerType()); 4850#endif 4851 } 4852 return GCAttrs; 4853} 4854 4855//===----------------------------------------------------------------------===// 4856// Type Compatibility Testing 4857//===----------------------------------------------------------------------===// 4858 4859/// areCompatVectorTypes - Return true if the two specified vector types are 4860/// compatible. 4861static bool areCompatVectorTypes(const VectorType *LHS, 4862 const VectorType *RHS) { 4863 assert(LHS->isCanonicalUnqualified() && RHS->isCanonicalUnqualified()); 4864 return LHS->getElementType() == RHS->getElementType() && 4865 LHS->getNumElements() == RHS->getNumElements(); 4866} 4867 4868bool ASTContext::areCompatibleVectorTypes(QualType FirstVec, 4869 QualType SecondVec) { 4870 assert(FirstVec->isVectorType() && "FirstVec should be a vector type"); 4871 assert(SecondVec->isVectorType() && "SecondVec should be a vector type"); 4872 4873 if (hasSameUnqualifiedType(FirstVec, SecondVec)) 4874 return true; 4875 4876 // Treat Neon vector types and most AltiVec vector types as if they are the 4877 // equivalent GCC vector types. 4878 const VectorType *First = FirstVec->getAs<VectorType>(); 4879 const VectorType *Second = SecondVec->getAs<VectorType>(); 4880 if (First->getNumElements() == Second->getNumElements() && 4881 hasSameType(First->getElementType(), Second->getElementType()) && 4882 First->getVectorKind() != VectorType::AltiVecPixel && 4883 First->getVectorKind() != VectorType::AltiVecBool && 4884 Second->getVectorKind() != VectorType::AltiVecPixel && 4885 Second->getVectorKind() != VectorType::AltiVecBool) 4886 return true; 4887 4888 return false; 4889} 4890 4891//===----------------------------------------------------------------------===// 4892// ObjCQualifiedIdTypesAreCompatible - Compatibility testing for qualified id's. 4893//===----------------------------------------------------------------------===// 4894 4895/// ProtocolCompatibleWithProtocol - return 'true' if 'lProto' is in the 4896/// inheritance hierarchy of 'rProto'. 4897bool 4898ASTContext::ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 4899 ObjCProtocolDecl *rProto) const { 4900 if (lProto == rProto) 4901 return true; 4902 for (ObjCProtocolDecl::protocol_iterator PI = rProto->protocol_begin(), 4903 E = rProto->protocol_end(); PI != E; ++PI) 4904 if (ProtocolCompatibleWithProtocol(lProto, *PI)) 4905 return true; 4906 return false; 4907} 4908 4909/// QualifiedIdConformsQualifiedId - compare id<p,...> with id<p1,...> 4910/// return true if lhs's protocols conform to rhs's protocol; false 4911/// otherwise. 4912bool ASTContext::QualifiedIdConformsQualifiedId(QualType lhs, QualType rhs) { 4913 if (lhs->isObjCQualifiedIdType() && rhs->isObjCQualifiedIdType()) 4914 return ObjCQualifiedIdTypesAreCompatible(lhs, rhs, false); 4915 return false; 4916} 4917 4918/// ObjCQualifiedClassTypesAreCompatible - compare Class<p,...> and 4919/// Class<p1, ...>. 4920bool ASTContext::ObjCQualifiedClassTypesAreCompatible(QualType lhs, 4921 QualType rhs) { 4922 const ObjCObjectPointerType *lhsQID = lhs->getAs<ObjCObjectPointerType>(); 4923 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 4924 assert ((lhsQID && rhsOPT) && "ObjCQualifiedClassTypesAreCompatible"); 4925 4926 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4927 E = lhsQID->qual_end(); I != E; ++I) { 4928 bool match = false; 4929 ObjCProtocolDecl *lhsProto = *I; 4930 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 4931 E = rhsOPT->qual_end(); J != E; ++J) { 4932 ObjCProtocolDecl *rhsProto = *J; 4933 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto)) { 4934 match = true; 4935 break; 4936 } 4937 } 4938 if (!match) 4939 return false; 4940 } 4941 return true; 4942} 4943 4944/// ObjCQualifiedIdTypesAreCompatible - We know that one of lhs/rhs is an 4945/// ObjCQualifiedIDType. 4946bool ASTContext::ObjCQualifiedIdTypesAreCompatible(QualType lhs, QualType rhs, 4947 bool compare) { 4948 // Allow id<P..> and an 'id' or void* type in all cases. 4949 if (lhs->isVoidPointerType() || 4950 lhs->isObjCIdType() || lhs->isObjCClassType()) 4951 return true; 4952 else if (rhs->isVoidPointerType() || 4953 rhs->isObjCIdType() || rhs->isObjCClassType()) 4954 return true; 4955 4956 if (const ObjCObjectPointerType *lhsQID = lhs->getAsObjCQualifiedIdType()) { 4957 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 4958 4959 if (!rhsOPT) return false; 4960 4961 if (rhsOPT->qual_empty()) { 4962 // If the RHS is a unqualified interface pointer "NSString*", 4963 // make sure we check the class hierarchy. 4964 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4965 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4966 E = lhsQID->qual_end(); I != E; ++I) { 4967 // when comparing an id<P> on lhs with a static type on rhs, 4968 // see if static class implements all of id's protocols, directly or 4969 // through its super class and categories. 4970 if (!rhsID->ClassImplementsProtocol(*I, true)) 4971 return false; 4972 } 4973 } 4974 // If there are no qualifiers and no interface, we have an 'id'. 4975 return true; 4976 } 4977 // Both the right and left sides have qualifiers. 4978 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4979 E = lhsQID->qual_end(); I != E; ++I) { 4980 ObjCProtocolDecl *lhsProto = *I; 4981 bool match = false; 4982 4983 // when comparing an id<P> on lhs with a static type on rhs, 4984 // see if static class implements all of id's protocols, directly or 4985 // through its super class and categories. 4986 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 4987 E = rhsOPT->qual_end(); J != E; ++J) { 4988 ObjCProtocolDecl *rhsProto = *J; 4989 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4990 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4991 match = true; 4992 break; 4993 } 4994 } 4995 // If the RHS is a qualified interface pointer "NSString<P>*", 4996 // make sure we check the class hierarchy. 4997 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4998 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4999 E = lhsQID->qual_end(); I != E; ++I) { 5000 // when comparing an id<P> on lhs with a static type on rhs, 5001 // see if static class implements all of id's protocols, directly or 5002 // through its super class and categories. 5003 if (rhsID->ClassImplementsProtocol(*I, true)) { 5004 match = true; 5005 break; 5006 } 5007 } 5008 } 5009 if (!match) 5010 return false; 5011 } 5012 5013 return true; 5014 } 5015 5016 const ObjCObjectPointerType *rhsQID = rhs->getAsObjCQualifiedIdType(); 5017 assert(rhsQID && "One of the LHS/RHS should be id<x>"); 5018 5019 if (const ObjCObjectPointerType *lhsOPT = 5020 lhs->getAsObjCInterfacePointerType()) { 5021 // If both the right and left sides have qualifiers. 5022 for (ObjCObjectPointerType::qual_iterator I = lhsOPT->qual_begin(), 5023 E = lhsOPT->qual_end(); I != E; ++I) { 5024 ObjCProtocolDecl *lhsProto = *I; 5025 bool match = false; 5026 5027 // when comparing an id<P> on rhs with a static type on lhs, 5028 // see if static class implements all of id's protocols, directly or 5029 // through its super class and categories. 5030 // First, lhs protocols in the qualifier list must be found, direct 5031 // or indirect in rhs's qualifier list or it is a mismatch. 5032 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 5033 E = rhsQID->qual_end(); J != E; ++J) { 5034 ObjCProtocolDecl *rhsProto = *J; 5035 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 5036 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 5037 match = true; 5038 break; 5039 } 5040 } 5041 if (!match) 5042 return false; 5043 } 5044 5045 // Static class's protocols, or its super class or category protocols 5046 // must be found, direct or indirect in rhs's qualifier list or it is a mismatch. 5047 if (ObjCInterfaceDecl *lhsID = lhsOPT->getInterfaceDecl()) { 5048 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 5049 CollectInheritedProtocols(lhsID, LHSInheritedProtocols); 5050 // This is rather dubious but matches gcc's behavior. If lhs has 5051 // no type qualifier and its class has no static protocol(s) 5052 // assume that it is mismatch. 5053 if (LHSInheritedProtocols.empty() && lhsOPT->qual_empty()) 5054 return false; 5055 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 5056 LHSInheritedProtocols.begin(), 5057 E = LHSInheritedProtocols.end(); I != E; ++I) { 5058 bool match = false; 5059 ObjCProtocolDecl *lhsProto = (*I); 5060 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 5061 E = rhsQID->qual_end(); J != E; ++J) { 5062 ObjCProtocolDecl *rhsProto = *J; 5063 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 5064 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 5065 match = true; 5066 break; 5067 } 5068 } 5069 if (!match) 5070 return false; 5071 } 5072 } 5073 return true; 5074 } 5075 return false; 5076} 5077 5078/// canAssignObjCInterfaces - Return true if the two interface types are 5079/// compatible for assignment from RHS to LHS. This handles validation of any 5080/// protocol qualifiers on the LHS or RHS. 5081/// 5082bool ASTContext::canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 5083 const ObjCObjectPointerType *RHSOPT) { 5084 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 5085 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 5086 5087 // If either type represents the built-in 'id' or 'Class' types, return true. 5088 if (LHS->isObjCUnqualifiedIdOrClass() || 5089 RHS->isObjCUnqualifiedIdOrClass()) 5090 return true; 5091 5092 if (LHS->isObjCQualifiedId() || RHS->isObjCQualifiedId()) 5093 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 5094 QualType(RHSOPT,0), 5095 false); 5096 5097 if (LHS->isObjCQualifiedClass() && RHS->isObjCQualifiedClass()) 5098 return ObjCQualifiedClassTypesAreCompatible(QualType(LHSOPT,0), 5099 QualType(RHSOPT,0)); 5100 5101 // If we have 2 user-defined types, fall into that path. 5102 if (LHS->getInterface() && RHS->getInterface()) 5103 return canAssignObjCInterfaces(LHS, RHS); 5104 5105 return false; 5106} 5107 5108/// canAssignObjCInterfacesInBlockPointer - This routine is specifically written 5109/// for providing type-safety for objective-c pointers used to pass/return 5110/// arguments in block literals. When passed as arguments, passing 'A*' where 5111/// 'id' is expected is not OK. Passing 'Sub *" where 'Super *" is expected is 5112/// not OK. For the return type, the opposite is not OK. 5113bool ASTContext::canAssignObjCInterfacesInBlockPointer( 5114 const ObjCObjectPointerType *LHSOPT, 5115 const ObjCObjectPointerType *RHSOPT, 5116 bool BlockReturnType) { 5117 if (RHSOPT->isObjCBuiltinType() || LHSOPT->isObjCIdType()) 5118 return true; 5119 5120 if (LHSOPT->isObjCBuiltinType()) { 5121 return RHSOPT->isObjCBuiltinType() || RHSOPT->isObjCQualifiedIdType(); 5122 } 5123 5124 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 5125 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 5126 QualType(RHSOPT,0), 5127 false); 5128 5129 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 5130 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 5131 if (LHS && RHS) { // We have 2 user-defined types. 5132 if (LHS != RHS) { 5133 if (LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 5134 return BlockReturnType; 5135 if (RHS->getDecl()->isSuperClassOf(LHS->getDecl())) 5136 return !BlockReturnType; 5137 } 5138 else 5139 return true; 5140 } 5141 return false; 5142} 5143 5144/// getIntersectionOfProtocols - This routine finds the intersection of set 5145/// of protocols inherited from two distinct objective-c pointer objects. 5146/// It is used to build composite qualifier list of the composite type of 5147/// the conditional expression involving two objective-c pointer objects. 5148static 5149void getIntersectionOfProtocols(ASTContext &Context, 5150 const ObjCObjectPointerType *LHSOPT, 5151 const ObjCObjectPointerType *RHSOPT, 5152 llvm::SmallVectorImpl<ObjCProtocolDecl *> &IntersectionOfProtocols) { 5153 5154 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 5155 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 5156 assert(LHS->getInterface() && "LHS must have an interface base"); 5157 assert(RHS->getInterface() && "RHS must have an interface base"); 5158 5159 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> InheritedProtocolSet; 5160 unsigned LHSNumProtocols = LHS->getNumProtocols(); 5161 if (LHSNumProtocols > 0) 5162 InheritedProtocolSet.insert(LHS->qual_begin(), LHS->qual_end()); 5163 else { 5164 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 5165 Context.CollectInheritedProtocols(LHS->getInterface(), 5166 LHSInheritedProtocols); 5167 InheritedProtocolSet.insert(LHSInheritedProtocols.begin(), 5168 LHSInheritedProtocols.end()); 5169 } 5170 5171 unsigned RHSNumProtocols = RHS->getNumProtocols(); 5172 if (RHSNumProtocols > 0) { 5173 ObjCProtocolDecl **RHSProtocols = 5174 const_cast<ObjCProtocolDecl **>(RHS->qual_begin()); 5175 for (unsigned i = 0; i < RHSNumProtocols; ++i) 5176 if (InheritedProtocolSet.count(RHSProtocols[i])) 5177 IntersectionOfProtocols.push_back(RHSProtocols[i]); 5178 } 5179 else { 5180 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> RHSInheritedProtocols; 5181 Context.CollectInheritedProtocols(RHS->getInterface(), 5182 RHSInheritedProtocols); 5183 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 5184 RHSInheritedProtocols.begin(), 5185 E = RHSInheritedProtocols.end(); I != E; ++I) 5186 if (InheritedProtocolSet.count((*I))) 5187 IntersectionOfProtocols.push_back((*I)); 5188 } 5189} 5190 5191/// areCommonBaseCompatible - Returns common base class of the two classes if 5192/// one found. Note that this is O'2 algorithm. But it will be called as the 5193/// last type comparison in a ?-exp of ObjC pointer types before a 5194/// warning is issued. So, its invokation is extremely rare. 5195QualType ASTContext::areCommonBaseCompatible( 5196 const ObjCObjectPointerType *Lptr, 5197 const ObjCObjectPointerType *Rptr) { 5198 const ObjCObjectType *LHS = Lptr->getObjectType(); 5199 const ObjCObjectType *RHS = Rptr->getObjectType(); 5200 const ObjCInterfaceDecl* LDecl = LHS->getInterface(); 5201 const ObjCInterfaceDecl* RDecl = RHS->getInterface(); 5202 if (!LDecl || !RDecl || (LDecl == RDecl)) 5203 return QualType(); 5204 5205 do { 5206 LHS = cast<ObjCInterfaceType>(getObjCInterfaceType(LDecl)); 5207 if (canAssignObjCInterfaces(LHS, RHS)) { 5208 llvm::SmallVector<ObjCProtocolDecl *, 8> Protocols; 5209 getIntersectionOfProtocols(*this, Lptr, Rptr, Protocols); 5210 5211 QualType Result = QualType(LHS, 0); 5212 if (!Protocols.empty()) 5213 Result = getObjCObjectType(Result, Protocols.data(), Protocols.size()); 5214 Result = getObjCObjectPointerType(Result); 5215 return Result; 5216 } 5217 } while ((LDecl = LDecl->getSuperClass())); 5218 5219 return QualType(); 5220} 5221 5222bool ASTContext::canAssignObjCInterfaces(const ObjCObjectType *LHS, 5223 const ObjCObjectType *RHS) { 5224 assert(LHS->getInterface() && "LHS is not an interface type"); 5225 assert(RHS->getInterface() && "RHS is not an interface type"); 5226 5227 // Verify that the base decls are compatible: the RHS must be a subclass of 5228 // the LHS. 5229 if (!LHS->getInterface()->isSuperClassOf(RHS->getInterface())) 5230 return false; 5231 5232 // RHS must have a superset of the protocols in the LHS. If the LHS is not 5233 // protocol qualified at all, then we are good. 5234 if (LHS->getNumProtocols() == 0) 5235 return true; 5236 5237 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, 5238 // more detailed analysis is required. 5239 if (RHS->getNumProtocols() == 0) { 5240 // OK, if LHS is a superclass of RHS *and* 5241 // this superclass is assignment compatible with LHS. 5242 // false otherwise. 5243 bool IsSuperClass = 5244 LHS->getInterface()->isSuperClassOf(RHS->getInterface()); 5245 if (IsSuperClass) { 5246 // OK if conversion of LHS to SuperClass results in narrowing of types 5247 // ; i.e., SuperClass may implement at least one of the protocols 5248 // in LHS's protocol list. Example, SuperObj<P1> = lhs<P1,P2> is ok. 5249 // But not SuperObj<P1,P2,P3> = lhs<P1,P2>. 5250 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> SuperClassInheritedProtocols; 5251 CollectInheritedProtocols(RHS->getInterface(), SuperClassInheritedProtocols); 5252 // If super class has no protocols, it is not a match. 5253 if (SuperClassInheritedProtocols.empty()) 5254 return false; 5255 5256 for (ObjCObjectType::qual_iterator LHSPI = LHS->qual_begin(), 5257 LHSPE = LHS->qual_end(); 5258 LHSPI != LHSPE; LHSPI++) { 5259 bool SuperImplementsProtocol = false; 5260 ObjCProtocolDecl *LHSProto = (*LHSPI); 5261 5262 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 5263 SuperClassInheritedProtocols.begin(), 5264 E = SuperClassInheritedProtocols.end(); I != E; ++I) { 5265 ObjCProtocolDecl *SuperClassProto = (*I); 5266 if (SuperClassProto->lookupProtocolNamed(LHSProto->getIdentifier())) { 5267 SuperImplementsProtocol = true; 5268 break; 5269 } 5270 } 5271 if (!SuperImplementsProtocol) 5272 return false; 5273 } 5274 return true; 5275 } 5276 return false; 5277 } 5278 5279 for (ObjCObjectType::qual_iterator LHSPI = LHS->qual_begin(), 5280 LHSPE = LHS->qual_end(); 5281 LHSPI != LHSPE; LHSPI++) { 5282 bool RHSImplementsProtocol = false; 5283 5284 // If the RHS doesn't implement the protocol on the left, the types 5285 // are incompatible. 5286 for (ObjCObjectType::qual_iterator RHSPI = RHS->qual_begin(), 5287 RHSPE = RHS->qual_end(); 5288 RHSPI != RHSPE; RHSPI++) { 5289 if ((*RHSPI)->lookupProtocolNamed((*LHSPI)->getIdentifier())) { 5290 RHSImplementsProtocol = true; 5291 break; 5292 } 5293 } 5294 // FIXME: For better diagnostics, consider passing back the protocol name. 5295 if (!RHSImplementsProtocol) 5296 return false; 5297 } 5298 // The RHS implements all protocols listed on the LHS. 5299 return true; 5300} 5301 5302bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) { 5303 // get the "pointed to" types 5304 const ObjCObjectPointerType *LHSOPT = LHS->getAs<ObjCObjectPointerType>(); 5305 const ObjCObjectPointerType *RHSOPT = RHS->getAs<ObjCObjectPointerType>(); 5306 5307 if (!LHSOPT || !RHSOPT) 5308 return false; 5309 5310 return canAssignObjCInterfaces(LHSOPT, RHSOPT) || 5311 canAssignObjCInterfaces(RHSOPT, LHSOPT); 5312} 5313 5314bool ASTContext::canBindObjCObjectType(QualType To, QualType From) { 5315 return canAssignObjCInterfaces( 5316 getObjCObjectPointerType(To)->getAs<ObjCObjectPointerType>(), 5317 getObjCObjectPointerType(From)->getAs<ObjCObjectPointerType>()); 5318} 5319 5320/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible, 5321/// both shall have the identically qualified version of a compatible type. 5322/// C99 6.2.7p1: Two types have compatible types if their types are the 5323/// same. See 6.7.[2,3,5] for additional rules. 5324bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS, 5325 bool CompareUnqualified) { 5326 if (getLangOptions().CPlusPlus) 5327 return hasSameType(LHS, RHS); 5328 5329 return !mergeTypes(LHS, RHS, false, CompareUnqualified).isNull(); 5330} 5331 5332bool ASTContext::typesAreBlockPointerCompatible(QualType LHS, QualType RHS) { 5333 return !mergeTypes(LHS, RHS, true).isNull(); 5334} 5335 5336/// mergeTransparentUnionType - if T is a transparent union type and a member 5337/// of T is compatible with SubType, return the merged type, else return 5338/// QualType() 5339QualType ASTContext::mergeTransparentUnionType(QualType T, QualType SubType, 5340 bool OfBlockPointer, 5341 bool Unqualified) { 5342 if (const RecordType *UT = T->getAsUnionType()) { 5343 RecordDecl *UD = UT->getDecl(); 5344 if (UD->hasAttr<TransparentUnionAttr>()) { 5345 for (RecordDecl::field_iterator it = UD->field_begin(), 5346 itend = UD->field_end(); it != itend; ++it) { 5347 QualType ET = it->getType().getUnqualifiedType(); 5348 QualType MT = mergeTypes(ET, SubType, OfBlockPointer, Unqualified); 5349 if (!MT.isNull()) 5350 return MT; 5351 } 5352 } 5353 } 5354 5355 return QualType(); 5356} 5357 5358/// mergeFunctionArgumentTypes - merge two types which appear as function 5359/// argument types 5360QualType ASTContext::mergeFunctionArgumentTypes(QualType lhs, QualType rhs, 5361 bool OfBlockPointer, 5362 bool Unqualified) { 5363 // GNU extension: two types are compatible if they appear as a function 5364 // argument, one of the types is a transparent union type and the other 5365 // type is compatible with a union member 5366 QualType lmerge = mergeTransparentUnionType(lhs, rhs, OfBlockPointer, 5367 Unqualified); 5368 if (!lmerge.isNull()) 5369 return lmerge; 5370 5371 QualType rmerge = mergeTransparentUnionType(rhs, lhs, OfBlockPointer, 5372 Unqualified); 5373 if (!rmerge.isNull()) 5374 return rmerge; 5375 5376 return mergeTypes(lhs, rhs, OfBlockPointer, Unqualified); 5377} 5378 5379QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs, 5380 bool OfBlockPointer, 5381 bool Unqualified) { 5382 const FunctionType *lbase = lhs->getAs<FunctionType>(); 5383 const FunctionType *rbase = rhs->getAs<FunctionType>(); 5384 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 5385 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 5386 bool allLTypes = true; 5387 bool allRTypes = true; 5388 5389 // Check return type 5390 QualType retType; 5391 if (OfBlockPointer) { 5392 QualType RHS = rbase->getResultType(); 5393 QualType LHS = lbase->getResultType(); 5394 bool UnqualifiedResult = Unqualified; 5395 if (!UnqualifiedResult) 5396 UnqualifiedResult = (!RHS.hasQualifiers() && LHS.hasQualifiers()); 5397 retType = mergeTypes(LHS, RHS, true, UnqualifiedResult, true); 5398 } 5399 else 5400 retType = mergeTypes(lbase->getResultType(), rbase->getResultType(), false, 5401 Unqualified); 5402 if (retType.isNull()) return QualType(); 5403 5404 if (Unqualified) 5405 retType = retType.getUnqualifiedType(); 5406 5407 CanQualType LRetType = getCanonicalType(lbase->getResultType()); 5408 CanQualType RRetType = getCanonicalType(rbase->getResultType()); 5409 if (Unqualified) { 5410 LRetType = LRetType.getUnqualifiedType(); 5411 RRetType = RRetType.getUnqualifiedType(); 5412 } 5413 5414 if (getCanonicalType(retType) != LRetType) 5415 allLTypes = false; 5416 if (getCanonicalType(retType) != RRetType) 5417 allRTypes = false; 5418 5419 // FIXME: double check this 5420 // FIXME: should we error if lbase->getRegParmAttr() != 0 && 5421 // rbase->getRegParmAttr() != 0 && 5422 // lbase->getRegParmAttr() != rbase->getRegParmAttr()? 5423 FunctionType::ExtInfo lbaseInfo = lbase->getExtInfo(); 5424 FunctionType::ExtInfo rbaseInfo = rbase->getExtInfo(); 5425 5426 // Compatible functions must have compatible calling conventions 5427 if (!isSameCallConv(lbaseInfo.getCC(), rbaseInfo.getCC())) 5428 return QualType(); 5429 5430 // Regparm is part of the calling convention. 5431 if (lbaseInfo.getHasRegParm() != rbaseInfo.getHasRegParm()) 5432 return QualType(); 5433 if (lbaseInfo.getRegParm() != rbaseInfo.getRegParm()) 5434 return QualType(); 5435 5436 // It's noreturn if either type is. 5437 // FIXME: some uses, e.g. conditional exprs, really want this to be 'both'. 5438 bool NoReturn = lbaseInfo.getNoReturn() || rbaseInfo.getNoReturn(); 5439 if (NoReturn != lbaseInfo.getNoReturn()) 5440 allLTypes = false; 5441 if (NoReturn != rbaseInfo.getNoReturn()) 5442 allRTypes = false; 5443 5444 FunctionType::ExtInfo einfo(NoReturn, 5445 lbaseInfo.getHasRegParm(), 5446 lbaseInfo.getRegParm(), 5447 lbaseInfo.getCC()); 5448 5449 if (lproto && rproto) { // two C99 style function prototypes 5450 assert(!lproto->hasExceptionSpec() && !rproto->hasExceptionSpec() && 5451 "C++ shouldn't be here"); 5452 unsigned lproto_nargs = lproto->getNumArgs(); 5453 unsigned rproto_nargs = rproto->getNumArgs(); 5454 5455 // Compatible functions must have the same number of arguments 5456 if (lproto_nargs != rproto_nargs) 5457 return QualType(); 5458 5459 // Variadic and non-variadic functions aren't compatible 5460 if (lproto->isVariadic() != rproto->isVariadic()) 5461 return QualType(); 5462 5463 if (lproto->getTypeQuals() != rproto->getTypeQuals()) 5464 return QualType(); 5465 5466 // Check argument compatibility 5467 llvm::SmallVector<QualType, 10> types; 5468 for (unsigned i = 0; i < lproto_nargs; i++) { 5469 QualType largtype = lproto->getArgType(i).getUnqualifiedType(); 5470 QualType rargtype = rproto->getArgType(i).getUnqualifiedType(); 5471 QualType argtype = mergeFunctionArgumentTypes(largtype, rargtype, 5472 OfBlockPointer, 5473 Unqualified); 5474 if (argtype.isNull()) return QualType(); 5475 5476 if (Unqualified) 5477 argtype = argtype.getUnqualifiedType(); 5478 5479 types.push_back(argtype); 5480 if (Unqualified) { 5481 largtype = largtype.getUnqualifiedType(); 5482 rargtype = rargtype.getUnqualifiedType(); 5483 } 5484 5485 if (getCanonicalType(argtype) != getCanonicalType(largtype)) 5486 allLTypes = false; 5487 if (getCanonicalType(argtype) != getCanonicalType(rargtype)) 5488 allRTypes = false; 5489 } 5490 if (allLTypes) return lhs; 5491 if (allRTypes) return rhs; 5492 5493 FunctionProtoType::ExtProtoInfo EPI = lproto->getExtProtoInfo(); 5494 EPI.ExtInfo = einfo; 5495 return getFunctionType(retType, types.begin(), types.size(), EPI); 5496 } 5497 5498 if (lproto) allRTypes = false; 5499 if (rproto) allLTypes = false; 5500 5501 const FunctionProtoType *proto = lproto ? lproto : rproto; 5502 if (proto) { 5503 assert(!proto->hasExceptionSpec() && "C++ shouldn't be here"); 5504 if (proto->isVariadic()) return QualType(); 5505 // Check that the types are compatible with the types that 5506 // would result from default argument promotions (C99 6.7.5.3p15). 5507 // The only types actually affected are promotable integer 5508 // types and floats, which would be passed as a different 5509 // type depending on whether the prototype is visible. 5510 unsigned proto_nargs = proto->getNumArgs(); 5511 for (unsigned i = 0; i < proto_nargs; ++i) { 5512 QualType argTy = proto->getArgType(i); 5513 5514 // Look at the promotion type of enum types, since that is the type used 5515 // to pass enum values. 5516 if (const EnumType *Enum = argTy->getAs<EnumType>()) 5517 argTy = Enum->getDecl()->getPromotionType(); 5518 5519 if (argTy->isPromotableIntegerType() || 5520 getCanonicalType(argTy).getUnqualifiedType() == FloatTy) 5521 return QualType(); 5522 } 5523 5524 if (allLTypes) return lhs; 5525 if (allRTypes) return rhs; 5526 5527 FunctionProtoType::ExtProtoInfo EPI = proto->getExtProtoInfo(); 5528 EPI.ExtInfo = einfo; 5529 return getFunctionType(retType, proto->arg_type_begin(), 5530 proto->getNumArgs(), EPI); 5531 } 5532 5533 if (allLTypes) return lhs; 5534 if (allRTypes) return rhs; 5535 return getFunctionNoProtoType(retType, einfo); 5536} 5537 5538QualType ASTContext::mergeTypes(QualType LHS, QualType RHS, 5539 bool OfBlockPointer, 5540 bool Unqualified, bool BlockReturnType) { 5541 // C++ [expr]: If an expression initially has the type "reference to T", the 5542 // type is adjusted to "T" prior to any further analysis, the expression 5543 // designates the object or function denoted by the reference, and the 5544 // expression is an lvalue unless the reference is an rvalue reference and 5545 // the expression is a function call (possibly inside parentheses). 5546 assert(!LHS->getAs<ReferenceType>() && "LHS is a reference type?"); 5547 assert(!RHS->getAs<ReferenceType>() && "RHS is a reference type?"); 5548 5549 if (Unqualified) { 5550 LHS = LHS.getUnqualifiedType(); 5551 RHS = RHS.getUnqualifiedType(); 5552 } 5553 5554 QualType LHSCan = getCanonicalType(LHS), 5555 RHSCan = getCanonicalType(RHS); 5556 5557 // If two types are identical, they are compatible. 5558 if (LHSCan == RHSCan) 5559 return LHS; 5560 5561 // If the qualifiers are different, the types aren't compatible... mostly. 5562 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 5563 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 5564 if (LQuals != RQuals) { 5565 // If any of these qualifiers are different, we have a type 5566 // mismatch. 5567 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 5568 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 5569 return QualType(); 5570 5571 // Exactly one GC qualifier difference is allowed: __strong is 5572 // okay if the other type has no GC qualifier but is an Objective 5573 // C object pointer (i.e. implicitly strong by default). We fix 5574 // this by pretending that the unqualified type was actually 5575 // qualified __strong. 5576 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 5577 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 5578 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 5579 5580 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 5581 return QualType(); 5582 5583 if (GC_L == Qualifiers::Strong && RHSCan->isObjCObjectPointerType()) { 5584 return mergeTypes(LHS, getObjCGCQualType(RHS, Qualifiers::Strong)); 5585 } 5586 if (GC_R == Qualifiers::Strong && LHSCan->isObjCObjectPointerType()) { 5587 return mergeTypes(getObjCGCQualType(LHS, Qualifiers::Strong), RHS); 5588 } 5589 return QualType(); 5590 } 5591 5592 // Okay, qualifiers are equal. 5593 5594 Type::TypeClass LHSClass = LHSCan->getTypeClass(); 5595 Type::TypeClass RHSClass = RHSCan->getTypeClass(); 5596 5597 // We want to consider the two function types to be the same for these 5598 // comparisons, just force one to the other. 5599 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto; 5600 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto; 5601 5602 // Same as above for arrays 5603 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray) 5604 LHSClass = Type::ConstantArray; 5605 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray) 5606 RHSClass = Type::ConstantArray; 5607 5608 // ObjCInterfaces are just specialized ObjCObjects. 5609 if (LHSClass == Type::ObjCInterface) LHSClass = Type::ObjCObject; 5610 if (RHSClass == Type::ObjCInterface) RHSClass = Type::ObjCObject; 5611 5612 // Canonicalize ExtVector -> Vector. 5613 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector; 5614 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector; 5615 5616 // If the canonical type classes don't match. 5617 if (LHSClass != RHSClass) { 5618 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char, 5619 // a signed integer type, or an unsigned integer type. 5620 // Compatibility is based on the underlying type, not the promotion 5621 // type. 5622 if (const EnumType* ETy = LHS->getAs<EnumType>()) { 5623 if (ETy->getDecl()->getIntegerType() == RHSCan.getUnqualifiedType()) 5624 return RHS; 5625 } 5626 if (const EnumType* ETy = RHS->getAs<EnumType>()) { 5627 if (ETy->getDecl()->getIntegerType() == LHSCan.getUnqualifiedType()) 5628 return LHS; 5629 } 5630 5631 return QualType(); 5632 } 5633 5634 // The canonical type classes match. 5635 switch (LHSClass) { 5636#define TYPE(Class, Base) 5637#define ABSTRACT_TYPE(Class, Base) 5638#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) case Type::Class: 5639#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 5640#define DEPENDENT_TYPE(Class, Base) case Type::Class: 5641#include "clang/AST/TypeNodes.def" 5642 assert(false && "Non-canonical and dependent types shouldn't get here"); 5643 return QualType(); 5644 5645 case Type::LValueReference: 5646 case Type::RValueReference: 5647 case Type::MemberPointer: 5648 assert(false && "C++ should never be in mergeTypes"); 5649 return QualType(); 5650 5651 case Type::ObjCInterface: 5652 case Type::IncompleteArray: 5653 case Type::VariableArray: 5654 case Type::FunctionProto: 5655 case Type::ExtVector: 5656 assert(false && "Types are eliminated above"); 5657 return QualType(); 5658 5659 case Type::Pointer: 5660 { 5661 // Merge two pointer types, while trying to preserve typedef info 5662 QualType LHSPointee = LHS->getAs<PointerType>()->getPointeeType(); 5663 QualType RHSPointee = RHS->getAs<PointerType>()->getPointeeType(); 5664 if (Unqualified) { 5665 LHSPointee = LHSPointee.getUnqualifiedType(); 5666 RHSPointee = RHSPointee.getUnqualifiedType(); 5667 } 5668 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, false, 5669 Unqualified); 5670 if (ResultType.isNull()) return QualType(); 5671 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 5672 return LHS; 5673 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 5674 return RHS; 5675 return getPointerType(ResultType); 5676 } 5677 case Type::BlockPointer: 5678 { 5679 // Merge two block pointer types, while trying to preserve typedef info 5680 QualType LHSPointee = LHS->getAs<BlockPointerType>()->getPointeeType(); 5681 QualType RHSPointee = RHS->getAs<BlockPointerType>()->getPointeeType(); 5682 if (Unqualified) { 5683 LHSPointee = LHSPointee.getUnqualifiedType(); 5684 RHSPointee = RHSPointee.getUnqualifiedType(); 5685 } 5686 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, OfBlockPointer, 5687 Unqualified); 5688 if (ResultType.isNull()) return QualType(); 5689 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 5690 return LHS; 5691 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 5692 return RHS; 5693 return getBlockPointerType(ResultType); 5694 } 5695 case Type::ConstantArray: 5696 { 5697 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS); 5698 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS); 5699 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize()) 5700 return QualType(); 5701 5702 QualType LHSElem = getAsArrayType(LHS)->getElementType(); 5703 QualType RHSElem = getAsArrayType(RHS)->getElementType(); 5704 if (Unqualified) { 5705 LHSElem = LHSElem.getUnqualifiedType(); 5706 RHSElem = RHSElem.getUnqualifiedType(); 5707 } 5708 5709 QualType ResultType = mergeTypes(LHSElem, RHSElem, false, Unqualified); 5710 if (ResultType.isNull()) return QualType(); 5711 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 5712 return LHS; 5713 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 5714 return RHS; 5715 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(), 5716 ArrayType::ArraySizeModifier(), 0); 5717 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(), 5718 ArrayType::ArraySizeModifier(), 0); 5719 const VariableArrayType* LVAT = getAsVariableArrayType(LHS); 5720 const VariableArrayType* RVAT = getAsVariableArrayType(RHS); 5721 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 5722 return LHS; 5723 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 5724 return RHS; 5725 if (LVAT) { 5726 // FIXME: This isn't correct! But tricky to implement because 5727 // the array's size has to be the size of LHS, but the type 5728 // has to be different. 5729 return LHS; 5730 } 5731 if (RVAT) { 5732 // FIXME: This isn't correct! But tricky to implement because 5733 // the array's size has to be the size of RHS, but the type 5734 // has to be different. 5735 return RHS; 5736 } 5737 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS; 5738 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS; 5739 return getIncompleteArrayType(ResultType, 5740 ArrayType::ArraySizeModifier(), 0); 5741 } 5742 case Type::FunctionNoProto: 5743 return mergeFunctionTypes(LHS, RHS, OfBlockPointer, Unqualified); 5744 case Type::Record: 5745 case Type::Enum: 5746 return QualType(); 5747 case Type::Builtin: 5748 // Only exactly equal builtin types are compatible, which is tested above. 5749 return QualType(); 5750 case Type::Complex: 5751 // Distinct complex types are incompatible. 5752 return QualType(); 5753 case Type::Vector: 5754 // FIXME: The merged type should be an ExtVector! 5755 if (areCompatVectorTypes(LHSCan->getAs<VectorType>(), 5756 RHSCan->getAs<VectorType>())) 5757 return LHS; 5758 return QualType(); 5759 case Type::ObjCObject: { 5760 // Check if the types are assignment compatible. 5761 // FIXME: This should be type compatibility, e.g. whether 5762 // "LHS x; RHS x;" at global scope is legal. 5763 const ObjCObjectType* LHSIface = LHS->getAs<ObjCObjectType>(); 5764 const ObjCObjectType* RHSIface = RHS->getAs<ObjCObjectType>(); 5765 if (canAssignObjCInterfaces(LHSIface, RHSIface)) 5766 return LHS; 5767 5768 return QualType(); 5769 } 5770 case Type::ObjCObjectPointer: { 5771 if (OfBlockPointer) { 5772 if (canAssignObjCInterfacesInBlockPointer( 5773 LHS->getAs<ObjCObjectPointerType>(), 5774 RHS->getAs<ObjCObjectPointerType>(), 5775 BlockReturnType)) 5776 return LHS; 5777 return QualType(); 5778 } 5779 if (canAssignObjCInterfaces(LHS->getAs<ObjCObjectPointerType>(), 5780 RHS->getAs<ObjCObjectPointerType>())) 5781 return LHS; 5782 5783 return QualType(); 5784 } 5785 } 5786 5787 return QualType(); 5788} 5789 5790/// mergeObjCGCQualifiers - This routine merges ObjC's GC attribute of 'LHS' and 5791/// 'RHS' attributes and returns the merged version; including for function 5792/// return types. 5793QualType ASTContext::mergeObjCGCQualifiers(QualType LHS, QualType RHS) { 5794 QualType LHSCan = getCanonicalType(LHS), 5795 RHSCan = getCanonicalType(RHS); 5796 // If two types are identical, they are compatible. 5797 if (LHSCan == RHSCan) 5798 return LHS; 5799 if (RHSCan->isFunctionType()) { 5800 if (!LHSCan->isFunctionType()) 5801 return QualType(); 5802 QualType OldReturnType = 5803 cast<FunctionType>(RHSCan.getTypePtr())->getResultType(); 5804 QualType NewReturnType = 5805 cast<FunctionType>(LHSCan.getTypePtr())->getResultType(); 5806 QualType ResReturnType = 5807 mergeObjCGCQualifiers(NewReturnType, OldReturnType); 5808 if (ResReturnType.isNull()) 5809 return QualType(); 5810 if (ResReturnType == NewReturnType || ResReturnType == OldReturnType) { 5811 // id foo(); ... __strong id foo(); or: __strong id foo(); ... id foo(); 5812 // In either case, use OldReturnType to build the new function type. 5813 const FunctionType *F = LHS->getAs<FunctionType>(); 5814 if (const FunctionProtoType *FPT = cast<FunctionProtoType>(F)) { 5815 FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); 5816 EPI.ExtInfo = getFunctionExtInfo(LHS); 5817 QualType ResultType 5818 = getFunctionType(OldReturnType, FPT->arg_type_begin(), 5819 FPT->getNumArgs(), EPI); 5820 return ResultType; 5821 } 5822 } 5823 return QualType(); 5824 } 5825 5826 // If the qualifiers are different, the types can still be merged. 5827 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 5828 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 5829 if (LQuals != RQuals) { 5830 // If any of these qualifiers are different, we have a type mismatch. 5831 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 5832 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 5833 return QualType(); 5834 5835 // Exactly one GC qualifier difference is allowed: __strong is 5836 // okay if the other type has no GC qualifier but is an Objective 5837 // C object pointer (i.e. implicitly strong by default). We fix 5838 // this by pretending that the unqualified type was actually 5839 // qualified __strong. 5840 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 5841 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 5842 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 5843 5844 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 5845 return QualType(); 5846 5847 if (GC_L == Qualifiers::Strong) 5848 return LHS; 5849 if (GC_R == Qualifiers::Strong) 5850 return RHS; 5851 return QualType(); 5852 } 5853 5854 if (LHSCan->isObjCObjectPointerType() && RHSCan->isObjCObjectPointerType()) { 5855 QualType LHSBaseQT = LHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 5856 QualType RHSBaseQT = RHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 5857 QualType ResQT = mergeObjCGCQualifiers(LHSBaseQT, RHSBaseQT); 5858 if (ResQT == LHSBaseQT) 5859 return LHS; 5860 if (ResQT == RHSBaseQT) 5861 return RHS; 5862 } 5863 return QualType(); 5864} 5865 5866//===----------------------------------------------------------------------===// 5867// Integer Predicates 5868//===----------------------------------------------------------------------===// 5869 5870unsigned ASTContext::getIntWidth(QualType T) const { 5871 if (const EnumType *ET = dyn_cast<EnumType>(T)) 5872 T = ET->getDecl()->getIntegerType(); 5873 if (T->isBooleanType()) 5874 return 1; 5875 // For builtin types, just use the standard type sizing method 5876 return (unsigned)getTypeSize(T); 5877} 5878 5879QualType ASTContext::getCorrespondingUnsignedType(QualType T) { 5880 assert(T->hasSignedIntegerRepresentation() && "Unexpected type"); 5881 5882 // Turn <4 x signed int> -> <4 x unsigned int> 5883 if (const VectorType *VTy = T->getAs<VectorType>()) 5884 return getVectorType(getCorrespondingUnsignedType(VTy->getElementType()), 5885 VTy->getNumElements(), VTy->getVectorKind()); 5886 5887 // For enums, we return the unsigned version of the base type. 5888 if (const EnumType *ETy = T->getAs<EnumType>()) 5889 T = ETy->getDecl()->getIntegerType(); 5890 5891 const BuiltinType *BTy = T->getAs<BuiltinType>(); 5892 assert(BTy && "Unexpected signed integer type"); 5893 switch (BTy->getKind()) { 5894 case BuiltinType::Char_S: 5895 case BuiltinType::SChar: 5896 return UnsignedCharTy; 5897 case BuiltinType::Short: 5898 return UnsignedShortTy; 5899 case BuiltinType::Int: 5900 return UnsignedIntTy; 5901 case BuiltinType::Long: 5902 return UnsignedLongTy; 5903 case BuiltinType::LongLong: 5904 return UnsignedLongLongTy; 5905 case BuiltinType::Int128: 5906 return UnsignedInt128Ty; 5907 default: 5908 assert(0 && "Unexpected signed integer type"); 5909 return QualType(); 5910 } 5911} 5912 5913ASTMutationListener::~ASTMutationListener() { } 5914 5915 5916//===----------------------------------------------------------------------===// 5917// Builtin Type Computation 5918//===----------------------------------------------------------------------===// 5919 5920/// DecodeTypeFromStr - This decodes one type descriptor from Str, advancing the 5921/// pointer over the consumed characters. This returns the resultant type. If 5922/// AllowTypeModifiers is false then modifier like * are not parsed, just basic 5923/// types. This allows "v2i*" to be parsed as a pointer to a v2i instead of 5924/// a vector of "i*". 5925/// 5926/// RequiresICE is filled in on return to indicate whether the value is required 5927/// to be an Integer Constant Expression. 5928static QualType DecodeTypeFromStr(const char *&Str, const ASTContext &Context, 5929 ASTContext::GetBuiltinTypeError &Error, 5930 bool &RequiresICE, 5931 bool AllowTypeModifiers) { 5932 // Modifiers. 5933 int HowLong = 0; 5934 bool Signed = false, Unsigned = false; 5935 RequiresICE = false; 5936 5937 // Read the prefixed modifiers first. 5938 bool Done = false; 5939 while (!Done) { 5940 switch (*Str++) { 5941 default: Done = true; --Str; break; 5942 case 'I': 5943 RequiresICE = true; 5944 break; 5945 case 'S': 5946 assert(!Unsigned && "Can't use both 'S' and 'U' modifiers!"); 5947 assert(!Signed && "Can't use 'S' modifier multiple times!"); 5948 Signed = true; 5949 break; 5950 case 'U': 5951 assert(!Signed && "Can't use both 'S' and 'U' modifiers!"); 5952 assert(!Unsigned && "Can't use 'S' modifier multiple times!"); 5953 Unsigned = true; 5954 break; 5955 case 'L': 5956 assert(HowLong <= 2 && "Can't have LLLL modifier"); 5957 ++HowLong; 5958 break; 5959 } 5960 } 5961 5962 QualType Type; 5963 5964 // Read the base type. 5965 switch (*Str++) { 5966 default: assert(0 && "Unknown builtin type letter!"); 5967 case 'v': 5968 assert(HowLong == 0 && !Signed && !Unsigned && 5969 "Bad modifiers used with 'v'!"); 5970 Type = Context.VoidTy; 5971 break; 5972 case 'f': 5973 assert(HowLong == 0 && !Signed && !Unsigned && 5974 "Bad modifiers used with 'f'!"); 5975 Type = Context.FloatTy; 5976 break; 5977 case 'd': 5978 assert(HowLong < 2 && !Signed && !Unsigned && 5979 "Bad modifiers used with 'd'!"); 5980 if (HowLong) 5981 Type = Context.LongDoubleTy; 5982 else 5983 Type = Context.DoubleTy; 5984 break; 5985 case 's': 5986 assert(HowLong == 0 && "Bad modifiers used with 's'!"); 5987 if (Unsigned) 5988 Type = Context.UnsignedShortTy; 5989 else 5990 Type = Context.ShortTy; 5991 break; 5992 case 'i': 5993 if (HowLong == 3) 5994 Type = Unsigned ? Context.UnsignedInt128Ty : Context.Int128Ty; 5995 else if (HowLong == 2) 5996 Type = Unsigned ? Context.UnsignedLongLongTy : Context.LongLongTy; 5997 else if (HowLong == 1) 5998 Type = Unsigned ? Context.UnsignedLongTy : Context.LongTy; 5999 else 6000 Type = Unsigned ? Context.UnsignedIntTy : Context.IntTy; 6001 break; 6002 case 'c': 6003 assert(HowLong == 0 && "Bad modifiers used with 'c'!"); 6004 if (Signed) 6005 Type = Context.SignedCharTy; 6006 else if (Unsigned) 6007 Type = Context.UnsignedCharTy; 6008 else 6009 Type = Context.CharTy; 6010 break; 6011 case 'b': // boolean 6012 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'b'!"); 6013 Type = Context.BoolTy; 6014 break; 6015 case 'z': // size_t. 6016 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'z'!"); 6017 Type = Context.getSizeType(); 6018 break; 6019 case 'F': 6020 Type = Context.getCFConstantStringType(); 6021 break; 6022 case 'G': 6023 Type = Context.getObjCIdType(); 6024 break; 6025 case 'H': 6026 Type = Context.getObjCSelType(); 6027 break; 6028 case 'a': 6029 Type = Context.getBuiltinVaListType(); 6030 assert(!Type.isNull() && "builtin va list type not initialized!"); 6031 break; 6032 case 'A': 6033 // This is a "reference" to a va_list; however, what exactly 6034 // this means depends on how va_list is defined. There are two 6035 // different kinds of va_list: ones passed by value, and ones 6036 // passed by reference. An example of a by-value va_list is 6037 // x86, where va_list is a char*. An example of by-ref va_list 6038 // is x86-64, where va_list is a __va_list_tag[1]. For x86, 6039 // we want this argument to be a char*&; for x86-64, we want 6040 // it to be a __va_list_tag*. 6041 Type = Context.getBuiltinVaListType(); 6042 assert(!Type.isNull() && "builtin va list type not initialized!"); 6043 if (Type->isArrayType()) 6044 Type = Context.getArrayDecayedType(Type); 6045 else 6046 Type = Context.getLValueReferenceType(Type); 6047 break; 6048 case 'V': { 6049 char *End; 6050 unsigned NumElements = strtoul(Str, &End, 10); 6051 assert(End != Str && "Missing vector size"); 6052 Str = End; 6053 6054 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, 6055 RequiresICE, false); 6056 assert(!RequiresICE && "Can't require vector ICE"); 6057 6058 // TODO: No way to make AltiVec vectors in builtins yet. 6059 Type = Context.getVectorType(ElementType, NumElements, 6060 VectorType::GenericVector); 6061 break; 6062 } 6063 case 'X': { 6064 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, RequiresICE, 6065 false); 6066 assert(!RequiresICE && "Can't require complex ICE"); 6067 Type = Context.getComplexType(ElementType); 6068 break; 6069 } 6070 case 'P': 6071 Type = Context.getFILEType(); 6072 if (Type.isNull()) { 6073 Error = ASTContext::GE_Missing_stdio; 6074 return QualType(); 6075 } 6076 break; 6077 case 'J': 6078 if (Signed) 6079 Type = Context.getsigjmp_bufType(); 6080 else 6081 Type = Context.getjmp_bufType(); 6082 6083 if (Type.isNull()) { 6084 Error = ASTContext::GE_Missing_setjmp; 6085 return QualType(); 6086 } 6087 break; 6088 } 6089 6090 // If there are modifiers and if we're allowed to parse them, go for it. 6091 Done = !AllowTypeModifiers; 6092 while (!Done) { 6093 switch (char c = *Str++) { 6094 default: Done = true; --Str; break; 6095 case '*': 6096 case '&': { 6097 // Both pointers and references can have their pointee types 6098 // qualified with an address space. 6099 char *End; 6100 unsigned AddrSpace = strtoul(Str, &End, 10); 6101 if (End != Str && AddrSpace != 0) { 6102 Type = Context.getAddrSpaceQualType(Type, AddrSpace); 6103 Str = End; 6104 } 6105 if (c == '*') 6106 Type = Context.getPointerType(Type); 6107 else 6108 Type = Context.getLValueReferenceType(Type); 6109 break; 6110 } 6111 // FIXME: There's no way to have a built-in with an rvalue ref arg. 6112 case 'C': 6113 Type = Type.withConst(); 6114 break; 6115 case 'D': 6116 Type = Context.getVolatileType(Type); 6117 break; 6118 } 6119 } 6120 6121 assert((!RequiresICE || Type->isIntegralOrEnumerationType()) && 6122 "Integer constant 'I' type must be an integer"); 6123 6124 return Type; 6125} 6126 6127/// GetBuiltinType - Return the type for the specified builtin. 6128QualType ASTContext::GetBuiltinType(unsigned Id, 6129 GetBuiltinTypeError &Error, 6130 unsigned *IntegerConstantArgs) const { 6131 const char *TypeStr = BuiltinInfo.GetTypeString(Id); 6132 6133 llvm::SmallVector<QualType, 8> ArgTypes; 6134 6135 bool RequiresICE = false; 6136 Error = GE_None; 6137 QualType ResType = DecodeTypeFromStr(TypeStr, *this, Error, 6138 RequiresICE, true); 6139 if (Error != GE_None) 6140 return QualType(); 6141 6142 assert(!RequiresICE && "Result of intrinsic cannot be required to be an ICE"); 6143 6144 while (TypeStr[0] && TypeStr[0] != '.') { 6145 QualType Ty = DecodeTypeFromStr(TypeStr, *this, Error, RequiresICE, true); 6146 if (Error != GE_None) 6147 return QualType(); 6148 6149 // If this argument is required to be an IntegerConstantExpression and the 6150 // caller cares, fill in the bitmask we return. 6151 if (RequiresICE && IntegerConstantArgs) 6152 *IntegerConstantArgs |= 1 << ArgTypes.size(); 6153 6154 // Do array -> pointer decay. The builtin should use the decayed type. 6155 if (Ty->isArrayType()) 6156 Ty = getArrayDecayedType(Ty); 6157 6158 ArgTypes.push_back(Ty); 6159 } 6160 6161 assert((TypeStr[0] != '.' || TypeStr[1] == 0) && 6162 "'.' should only occur at end of builtin type list!"); 6163 6164 FunctionType::ExtInfo EI; 6165 if (BuiltinInfo.isNoReturn(Id)) EI = EI.withNoReturn(true); 6166 6167 bool Variadic = (TypeStr[0] == '.'); 6168 6169 // We really shouldn't be making a no-proto type here, especially in C++. 6170 if (ArgTypes.empty() && Variadic) 6171 return getFunctionNoProtoType(ResType, EI); 6172 6173 FunctionProtoType::ExtProtoInfo EPI; 6174 EPI.ExtInfo = EI; 6175 EPI.Variadic = Variadic; 6176 6177 return getFunctionType(ResType, ArgTypes.data(), ArgTypes.size(), EPI); 6178} 6179 6180GVALinkage ASTContext::GetGVALinkageForFunction(const FunctionDecl *FD) { 6181 GVALinkage External = GVA_StrongExternal; 6182 6183 Linkage L = FD->getLinkage(); 6184 switch (L) { 6185 case NoLinkage: 6186 case InternalLinkage: 6187 case UniqueExternalLinkage: 6188 return GVA_Internal; 6189 6190 case ExternalLinkage: 6191 switch (FD->getTemplateSpecializationKind()) { 6192 case TSK_Undeclared: 6193 case TSK_ExplicitSpecialization: 6194 External = GVA_StrongExternal; 6195 break; 6196 6197 case TSK_ExplicitInstantiationDefinition: 6198 return GVA_ExplicitTemplateInstantiation; 6199 6200 case TSK_ExplicitInstantiationDeclaration: 6201 case TSK_ImplicitInstantiation: 6202 External = GVA_TemplateInstantiation; 6203 break; 6204 } 6205 } 6206 6207 if (!FD->isInlined()) 6208 return External; 6209 6210 if (!getLangOptions().CPlusPlus || FD->hasAttr<GNUInlineAttr>()) { 6211 // GNU or C99 inline semantics. Determine whether this symbol should be 6212 // externally visible. 6213 if (FD->isInlineDefinitionExternallyVisible()) 6214 return External; 6215 6216 // C99 inline semantics, where the symbol is not externally visible. 6217 return GVA_C99Inline; 6218 } 6219 6220 // C++0x [temp.explicit]p9: 6221 // [ Note: The intent is that an inline function that is the subject of 6222 // an explicit instantiation declaration will still be implicitly 6223 // instantiated when used so that the body can be considered for 6224 // inlining, but that no out-of-line copy of the inline function would be 6225 // generated in the translation unit. -- end note ] 6226 if (FD->getTemplateSpecializationKind() 6227 == TSK_ExplicitInstantiationDeclaration) 6228 return GVA_C99Inline; 6229 6230 return GVA_CXXInline; 6231} 6232 6233GVALinkage ASTContext::GetGVALinkageForVariable(const VarDecl *VD) { 6234 // If this is a static data member, compute the kind of template 6235 // specialization. Otherwise, this variable is not part of a 6236 // template. 6237 TemplateSpecializationKind TSK = TSK_Undeclared; 6238 if (VD->isStaticDataMember()) 6239 TSK = VD->getTemplateSpecializationKind(); 6240 6241 Linkage L = VD->getLinkage(); 6242 if (L == ExternalLinkage && getLangOptions().CPlusPlus && 6243 VD->getType()->getLinkage() == UniqueExternalLinkage) 6244 L = UniqueExternalLinkage; 6245 6246 switch (L) { 6247 case NoLinkage: 6248 case InternalLinkage: 6249 case UniqueExternalLinkage: 6250 return GVA_Internal; 6251 6252 case ExternalLinkage: 6253 switch (TSK) { 6254 case TSK_Undeclared: 6255 case TSK_ExplicitSpecialization: 6256 return GVA_StrongExternal; 6257 6258 case TSK_ExplicitInstantiationDeclaration: 6259 llvm_unreachable("Variable should not be instantiated"); 6260 // Fall through to treat this like any other instantiation. 6261 6262 case TSK_ExplicitInstantiationDefinition: 6263 return GVA_ExplicitTemplateInstantiation; 6264 6265 case TSK_ImplicitInstantiation: 6266 return GVA_TemplateInstantiation; 6267 } 6268 } 6269 6270 return GVA_StrongExternal; 6271} 6272 6273bool ASTContext::DeclMustBeEmitted(const Decl *D) { 6274 if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { 6275 if (!VD->isFileVarDecl()) 6276 return false; 6277 } else if (!isa<FunctionDecl>(D)) 6278 return false; 6279 6280 // Weak references don't produce any output by themselves. 6281 if (D->hasAttr<WeakRefAttr>()) 6282 return false; 6283 6284 // Aliases and used decls are required. 6285 if (D->hasAttr<AliasAttr>() || D->hasAttr<UsedAttr>()) 6286 return true; 6287 6288 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 6289 // Forward declarations aren't required. 6290 if (!FD->doesThisDeclarationHaveABody()) 6291 return false; 6292 6293 // Constructors and destructors are required. 6294 if (FD->hasAttr<ConstructorAttr>() || FD->hasAttr<DestructorAttr>()) 6295 return true; 6296 6297 // The key function for a class is required. 6298 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { 6299 const CXXRecordDecl *RD = MD->getParent(); 6300 if (MD->isOutOfLine() && RD->isDynamicClass()) { 6301 const CXXMethodDecl *KeyFunc = getKeyFunction(RD); 6302 if (KeyFunc && KeyFunc->getCanonicalDecl() == MD->getCanonicalDecl()) 6303 return true; 6304 } 6305 } 6306 6307 GVALinkage Linkage = GetGVALinkageForFunction(FD); 6308 6309 // static, static inline, always_inline, and extern inline functions can 6310 // always be deferred. Normal inline functions can be deferred in C99/C++. 6311 // Implicit template instantiations can also be deferred in C++. 6312 if (Linkage == GVA_Internal || Linkage == GVA_C99Inline || 6313 Linkage == GVA_CXXInline || Linkage == GVA_TemplateInstantiation) 6314 return false; 6315 return true; 6316 } 6317 6318 const VarDecl *VD = cast<VarDecl>(D); 6319 assert(VD->isFileVarDecl() && "Expected file scoped var"); 6320 6321 if (VD->isThisDeclarationADefinition() == VarDecl::DeclarationOnly) 6322 return false; 6323 6324 // Structs that have non-trivial constructors or destructors are required. 6325 6326 // FIXME: Handle references. 6327 // FIXME: Be more selective about which constructors we care about. 6328 if (const RecordType *RT = VD->getType()->getAs<RecordType>()) { 6329 if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(RT->getDecl())) { 6330 if (RD->hasDefinition() && !(RD->hasTrivialDefaultConstructor() && 6331 RD->hasTrivialCopyConstructor() && 6332 RD->hasTrivialMoveConstructor() && 6333 RD->hasTrivialDestructor())) 6334 return true; 6335 } 6336 } 6337 6338 GVALinkage L = GetGVALinkageForVariable(VD); 6339 if (L == GVA_Internal || L == GVA_TemplateInstantiation) { 6340 if (!(VD->getInit() && VD->getInit()->HasSideEffects(*this))) 6341 return false; 6342 } 6343 6344 return true; 6345} 6346 6347CallingConv ASTContext::getDefaultMethodCallConv() { 6348 // Pass through to the C++ ABI object 6349 return ABI->getDefaultMethodCallConv(); 6350} 6351 6352bool ASTContext::isNearlyEmpty(const CXXRecordDecl *RD) const { 6353 // Pass through to the C++ ABI object 6354 return ABI->isNearlyEmpty(RD); 6355} 6356 6357MangleContext *ASTContext::createMangleContext() { 6358 switch (Target.getCXXABI()) { 6359 case CXXABI_ARM: 6360 case CXXABI_Itanium: 6361 return createItaniumMangleContext(*this, getDiagnostics()); 6362 case CXXABI_Microsoft: 6363 return createMicrosoftMangleContext(*this, getDiagnostics()); 6364 } 6365 assert(0 && "Unsupported ABI"); 6366 return 0; 6367} 6368 6369CXXABI::~CXXABI() {} 6370 6371size_t ASTContext::getSideTableAllocatedMemory() const { 6372 size_t bytes = 0; 6373 bytes += ASTRecordLayouts.getMemorySize(); 6374 bytes += ObjCLayouts.getMemorySize(); 6375 bytes += KeyFunctions.getMemorySize(); 6376 bytes += ObjCImpls.getMemorySize(); 6377 bytes += BlockVarCopyInits.getMemorySize(); 6378 bytes += DeclAttrs.getMemorySize(); 6379 bytes += InstantiatedFromStaticDataMember.getMemorySize(); 6380 bytes += InstantiatedFromUsingDecl.getMemorySize(); 6381 bytes += InstantiatedFromUsingShadowDecl.getMemorySize(); 6382 bytes += InstantiatedFromUnnamedFieldDecl.getMemorySize(); 6383 return bytes; 6384} 6385 6386