ASTContext.cpp revision 06bfa84588658d721094f383d6950e75100c4c4c
1//===--- ASTContext.cpp - Context to hold long-lived AST nodes ------------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// This file implements the ASTContext interface. 11// 12//===----------------------------------------------------------------------===// 13 14#include "clang/AST/ASTContext.h" 15#include "clang/AST/CharUnits.h" 16#include "clang/AST/DeclCXX.h" 17#include "clang/AST/DeclObjC.h" 18#include "clang/AST/DeclTemplate.h" 19#include "clang/AST/TypeLoc.h" 20#include "clang/AST/Expr.h" 21#include "clang/AST/ExprCXX.h" 22#include "clang/AST/ExternalASTSource.h" 23#include "clang/AST/ASTMutationListener.h" 24#include "clang/AST/RecordLayout.h" 25#include "clang/AST/Mangle.h" 26#include "clang/Basic/Builtins.h" 27#include "clang/Basic/SourceManager.h" 28#include "clang/Basic/TargetInfo.h" 29#include "llvm/ADT/SmallString.h" 30#include "llvm/ADT/StringExtras.h" 31#include "llvm/Support/MathExtras.h" 32#include "llvm/Support/raw_ostream.h" 33#include "CXXABI.h" 34 35using namespace clang; 36 37unsigned ASTContext::NumImplicitDefaultConstructors; 38unsigned ASTContext::NumImplicitDefaultConstructorsDeclared; 39unsigned ASTContext::NumImplicitCopyConstructors; 40unsigned ASTContext::NumImplicitCopyConstructorsDeclared; 41unsigned ASTContext::NumImplicitCopyAssignmentOperators; 42unsigned ASTContext::NumImplicitCopyAssignmentOperatorsDeclared; 43unsigned ASTContext::NumImplicitDestructors; 44unsigned ASTContext::NumImplicitDestructorsDeclared; 45 46enum FloatingRank { 47 FloatRank, DoubleRank, LongDoubleRank 48}; 49 50void 51ASTContext::CanonicalTemplateTemplateParm::Profile(llvm::FoldingSetNodeID &ID, 52 TemplateTemplateParmDecl *Parm) { 53 ID.AddInteger(Parm->getDepth()); 54 ID.AddInteger(Parm->getPosition()); 55 ID.AddBoolean(Parm->isParameterPack()); 56 57 TemplateParameterList *Params = Parm->getTemplateParameters(); 58 ID.AddInteger(Params->size()); 59 for (TemplateParameterList::const_iterator P = Params->begin(), 60 PEnd = Params->end(); 61 P != PEnd; ++P) { 62 if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*P)) { 63 ID.AddInteger(0); 64 ID.AddBoolean(TTP->isParameterPack()); 65 continue; 66 } 67 68 if (NonTypeTemplateParmDecl *NTTP = dyn_cast<NonTypeTemplateParmDecl>(*P)) { 69 ID.AddInteger(1); 70 ID.AddBoolean(NTTP->isParameterPack()); 71 ID.AddPointer(NTTP->getType().getAsOpaquePtr()); 72 if (NTTP->isExpandedParameterPack()) { 73 ID.AddBoolean(true); 74 ID.AddInteger(NTTP->getNumExpansionTypes()); 75 for (unsigned I = 0, N = NTTP->getNumExpansionTypes(); I != N; ++I) 76 ID.AddPointer(NTTP->getExpansionType(I).getAsOpaquePtr()); 77 } else 78 ID.AddBoolean(false); 79 continue; 80 } 81 82 TemplateTemplateParmDecl *TTP = cast<TemplateTemplateParmDecl>(*P); 83 ID.AddInteger(2); 84 Profile(ID, TTP); 85 } 86} 87 88TemplateTemplateParmDecl * 89ASTContext::getCanonicalTemplateTemplateParmDecl( 90 TemplateTemplateParmDecl *TTP) const { 91 // Check if we already have a canonical template template parameter. 92 llvm::FoldingSetNodeID ID; 93 CanonicalTemplateTemplateParm::Profile(ID, TTP); 94 void *InsertPos = 0; 95 CanonicalTemplateTemplateParm *Canonical 96 = CanonTemplateTemplateParms.FindNodeOrInsertPos(ID, InsertPos); 97 if (Canonical) 98 return Canonical->getParam(); 99 100 // Build a canonical template parameter list. 101 TemplateParameterList *Params = TTP->getTemplateParameters(); 102 llvm::SmallVector<NamedDecl *, 4> CanonParams; 103 CanonParams.reserve(Params->size()); 104 for (TemplateParameterList::const_iterator P = Params->begin(), 105 PEnd = Params->end(); 106 P != PEnd; ++P) { 107 if (TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(*P)) 108 CanonParams.push_back( 109 TemplateTypeParmDecl::Create(*this, getTranslationUnitDecl(), 110 SourceLocation(), TTP->getDepth(), 111 TTP->getIndex(), 0, false, 112 TTP->isParameterPack())); 113 else if (NonTypeTemplateParmDecl *NTTP 114 = dyn_cast<NonTypeTemplateParmDecl>(*P)) { 115 QualType T = getCanonicalType(NTTP->getType()); 116 TypeSourceInfo *TInfo = getTrivialTypeSourceInfo(T); 117 NonTypeTemplateParmDecl *Param; 118 if (NTTP->isExpandedParameterPack()) { 119 llvm::SmallVector<QualType, 2> ExpandedTypes; 120 llvm::SmallVector<TypeSourceInfo *, 2> ExpandedTInfos; 121 for (unsigned I = 0, N = NTTP->getNumExpansionTypes(); I != N; ++I) { 122 ExpandedTypes.push_back(getCanonicalType(NTTP->getExpansionType(I))); 123 ExpandedTInfos.push_back( 124 getTrivialTypeSourceInfo(ExpandedTypes.back())); 125 } 126 127 Param = NonTypeTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 128 SourceLocation(), 129 NTTP->getDepth(), 130 NTTP->getPosition(), 0, 131 T, 132 TInfo, 133 ExpandedTypes.data(), 134 ExpandedTypes.size(), 135 ExpandedTInfos.data()); 136 } else { 137 Param = NonTypeTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 138 SourceLocation(), 139 NTTP->getDepth(), 140 NTTP->getPosition(), 0, 141 T, 142 NTTP->isParameterPack(), 143 TInfo); 144 } 145 CanonParams.push_back(Param); 146 147 } else 148 CanonParams.push_back(getCanonicalTemplateTemplateParmDecl( 149 cast<TemplateTemplateParmDecl>(*P))); 150 } 151 152 TemplateTemplateParmDecl *CanonTTP 153 = TemplateTemplateParmDecl::Create(*this, getTranslationUnitDecl(), 154 SourceLocation(), TTP->getDepth(), 155 TTP->getPosition(), 156 TTP->isParameterPack(), 157 0, 158 TemplateParameterList::Create(*this, SourceLocation(), 159 SourceLocation(), 160 CanonParams.data(), 161 CanonParams.size(), 162 SourceLocation())); 163 164 // Get the new insert position for the node we care about. 165 Canonical = CanonTemplateTemplateParms.FindNodeOrInsertPos(ID, InsertPos); 166 assert(Canonical == 0 && "Shouldn't be in the map!"); 167 (void)Canonical; 168 169 // Create the canonical template template parameter entry. 170 Canonical = new (*this) CanonicalTemplateTemplateParm(CanonTTP); 171 CanonTemplateTemplateParms.InsertNode(Canonical, InsertPos); 172 return CanonTTP; 173} 174 175CXXABI *ASTContext::createCXXABI(const TargetInfo &T) { 176 if (!LangOpts.CPlusPlus) return 0; 177 178 switch (T.getCXXABI()) { 179 case CXXABI_ARM: 180 return CreateARMCXXABI(*this); 181 case CXXABI_Itanium: 182 return CreateItaniumCXXABI(*this); 183 case CXXABI_Microsoft: 184 return CreateMicrosoftCXXABI(*this); 185 } 186 return 0; 187} 188 189ASTContext::ASTContext(const LangOptions& LOpts, SourceManager &SM, 190 const TargetInfo &t, 191 IdentifierTable &idents, SelectorTable &sels, 192 Builtin::Context &builtins, 193 unsigned size_reserve) : 194 TemplateSpecializationTypes(this_()), 195 DependentTemplateSpecializationTypes(this_()), 196 GlobalNestedNameSpecifier(0), IsInt128Installed(false), 197 CFConstantStringTypeDecl(0), NSConstantStringTypeDecl(0), 198 ObjCFastEnumerationStateTypeDecl(0), FILEDecl(0), jmp_bufDecl(0), 199 sigjmp_bufDecl(0), BlockDescriptorType(0), BlockDescriptorExtendedType(0), 200 cudaConfigureCallDecl(0), 201 NullTypeSourceInfo(QualType()), 202 SourceMgr(SM), LangOpts(LOpts), ABI(createCXXABI(t)), Target(t), 203 Idents(idents), Selectors(sels), 204 BuiltinInfo(builtins), 205 DeclarationNames(*this), 206 ExternalSource(0), Listener(0), PrintingPolicy(LOpts), 207 LastSDM(0, 0), 208 UniqueBlockByRefTypeID(0) { 209 ObjCIdRedefinitionType = QualType(); 210 ObjCClassRedefinitionType = QualType(); 211 ObjCSelRedefinitionType = QualType(); 212 if (size_reserve > 0) Types.reserve(size_reserve); 213 TUDecl = TranslationUnitDecl::Create(*this); 214 InitBuiltinTypes(); 215} 216 217ASTContext::~ASTContext() { 218 // Release the DenseMaps associated with DeclContext objects. 219 // FIXME: Is this the ideal solution? 220 ReleaseDeclContextMaps(); 221 222 // Call all of the deallocation functions. 223 for (unsigned I = 0, N = Deallocations.size(); I != N; ++I) 224 Deallocations[I].first(Deallocations[I].second); 225 226 // Release all of the memory associated with overridden C++ methods. 227 for (llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::iterator 228 OM = OverriddenMethods.begin(), OMEnd = OverriddenMethods.end(); 229 OM != OMEnd; ++OM) 230 OM->second.Destroy(); 231 232 // ASTRecordLayout objects in ASTRecordLayouts must always be destroyed 233 // because they can contain DenseMaps. 234 for (llvm::DenseMap<const ObjCContainerDecl*, 235 const ASTRecordLayout*>::iterator 236 I = ObjCLayouts.begin(), E = ObjCLayouts.end(); I != E; ) 237 // Increment in loop to prevent using deallocated memory. 238 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 239 R->Destroy(*this); 240 241 for (llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*>::iterator 242 I = ASTRecordLayouts.begin(), E = ASTRecordLayouts.end(); I != E; ) { 243 // Increment in loop to prevent using deallocated memory. 244 if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 245 R->Destroy(*this); 246 } 247 248 for (llvm::DenseMap<const Decl*, AttrVec*>::iterator A = DeclAttrs.begin(), 249 AEnd = DeclAttrs.end(); 250 A != AEnd; ++A) 251 A->second->~AttrVec(); 252} 253 254void ASTContext::AddDeallocation(void (*Callback)(void*), void *Data) { 255 Deallocations.push_back(std::make_pair(Callback, Data)); 256} 257 258void 259ASTContext::setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source) { 260 ExternalSource.reset(Source.take()); 261} 262 263void ASTContext::PrintStats() const { 264 fprintf(stderr, "*** AST Context Stats:\n"); 265 fprintf(stderr, " %d types total.\n", (int)Types.size()); 266 267 unsigned counts[] = { 268#define TYPE(Name, Parent) 0, 269#define ABSTRACT_TYPE(Name, Parent) 270#include "clang/AST/TypeNodes.def" 271 0 // Extra 272 }; 273 274 for (unsigned i = 0, e = Types.size(); i != e; ++i) { 275 Type *T = Types[i]; 276 counts[(unsigned)T->getTypeClass()]++; 277 } 278 279 unsigned Idx = 0; 280 unsigned TotalBytes = 0; 281#define TYPE(Name, Parent) \ 282 if (counts[Idx]) \ 283 fprintf(stderr, " %d %s types\n", (int)counts[Idx], #Name); \ 284 TotalBytes += counts[Idx] * sizeof(Name##Type); \ 285 ++Idx; 286#define ABSTRACT_TYPE(Name, Parent) 287#include "clang/AST/TypeNodes.def" 288 289 fprintf(stderr, "Total bytes = %d\n", int(TotalBytes)); 290 291 // Implicit special member functions. 292 fprintf(stderr, " %u/%u implicit default constructors created\n", 293 NumImplicitDefaultConstructorsDeclared, 294 NumImplicitDefaultConstructors); 295 fprintf(stderr, " %u/%u implicit copy constructors created\n", 296 NumImplicitCopyConstructorsDeclared, 297 NumImplicitCopyConstructors); 298 fprintf(stderr, " %u/%u implicit copy assignment operators created\n", 299 NumImplicitCopyAssignmentOperatorsDeclared, 300 NumImplicitCopyAssignmentOperators); 301 fprintf(stderr, " %u/%u implicit destructors created\n", 302 NumImplicitDestructorsDeclared, NumImplicitDestructors); 303 304 if (ExternalSource.get()) { 305 fprintf(stderr, "\n"); 306 ExternalSource->PrintStats(); 307 } 308 309 BumpAlloc.PrintStats(); 310} 311 312 313void ASTContext::InitBuiltinType(CanQualType &R, BuiltinType::Kind K) { 314 BuiltinType *Ty = new (*this, TypeAlignment) BuiltinType(K); 315 R = CanQualType::CreateUnsafe(QualType(Ty, 0)); 316 Types.push_back(Ty); 317} 318 319void ASTContext::InitBuiltinTypes() { 320 assert(VoidTy.isNull() && "Context reinitialized?"); 321 322 // C99 6.2.5p19. 323 InitBuiltinType(VoidTy, BuiltinType::Void); 324 325 // C99 6.2.5p2. 326 InitBuiltinType(BoolTy, BuiltinType::Bool); 327 // C99 6.2.5p3. 328 if (LangOpts.CharIsSigned) 329 InitBuiltinType(CharTy, BuiltinType::Char_S); 330 else 331 InitBuiltinType(CharTy, BuiltinType::Char_U); 332 // C99 6.2.5p4. 333 InitBuiltinType(SignedCharTy, BuiltinType::SChar); 334 InitBuiltinType(ShortTy, BuiltinType::Short); 335 InitBuiltinType(IntTy, BuiltinType::Int); 336 InitBuiltinType(LongTy, BuiltinType::Long); 337 InitBuiltinType(LongLongTy, BuiltinType::LongLong); 338 339 // C99 6.2.5p6. 340 InitBuiltinType(UnsignedCharTy, BuiltinType::UChar); 341 InitBuiltinType(UnsignedShortTy, BuiltinType::UShort); 342 InitBuiltinType(UnsignedIntTy, BuiltinType::UInt); 343 InitBuiltinType(UnsignedLongTy, BuiltinType::ULong); 344 InitBuiltinType(UnsignedLongLongTy, BuiltinType::ULongLong); 345 346 // C99 6.2.5p10. 347 InitBuiltinType(FloatTy, BuiltinType::Float); 348 InitBuiltinType(DoubleTy, BuiltinType::Double); 349 InitBuiltinType(LongDoubleTy, BuiltinType::LongDouble); 350 351 // GNU extension, 128-bit integers. 352 InitBuiltinType(Int128Ty, BuiltinType::Int128); 353 InitBuiltinType(UnsignedInt128Ty, BuiltinType::UInt128); 354 355 if (LangOpts.CPlusPlus) { // C++ 3.9.1p5 356 if (!LangOpts.ShortWChar) 357 InitBuiltinType(WCharTy, BuiltinType::WChar_S); 358 else // -fshort-wchar makes wchar_t be unsigned. 359 InitBuiltinType(WCharTy, BuiltinType::WChar_U); 360 } else // C99 361 WCharTy = getFromTargetType(Target.getWCharType()); 362 363 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 364 InitBuiltinType(Char16Ty, BuiltinType::Char16); 365 else // C99 366 Char16Ty = getFromTargetType(Target.getChar16Type()); 367 368 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 369 InitBuiltinType(Char32Ty, BuiltinType::Char32); 370 else // C99 371 Char32Ty = getFromTargetType(Target.getChar32Type()); 372 373 // Placeholder type for type-dependent expressions whose type is 374 // completely unknown. No code should ever check a type against 375 // DependentTy and users should never see it; however, it is here to 376 // help diagnose failures to properly check for type-dependent 377 // expressions. 378 InitBuiltinType(DependentTy, BuiltinType::Dependent); 379 380 // Placeholder type for functions. 381 InitBuiltinType(OverloadTy, BuiltinType::Overload); 382 383 // C99 6.2.5p11. 384 FloatComplexTy = getComplexType(FloatTy); 385 DoubleComplexTy = getComplexType(DoubleTy); 386 LongDoubleComplexTy = getComplexType(LongDoubleTy); 387 388 BuiltinVaListType = QualType(); 389 390 // "Builtin" typedefs set by Sema::ActOnTranslationUnitScope(). 391 ObjCIdTypedefType = QualType(); 392 ObjCClassTypedefType = QualType(); 393 ObjCSelTypedefType = QualType(); 394 395 // Builtin types for 'id', 'Class', and 'SEL'. 396 InitBuiltinType(ObjCBuiltinIdTy, BuiltinType::ObjCId); 397 InitBuiltinType(ObjCBuiltinClassTy, BuiltinType::ObjCClass); 398 InitBuiltinType(ObjCBuiltinSelTy, BuiltinType::ObjCSel); 399 400 ObjCConstantStringType = QualType(); 401 402 // void * type 403 VoidPtrTy = getPointerType(VoidTy); 404 405 // nullptr type (C++0x 2.14.7) 406 InitBuiltinType(NullPtrTy, BuiltinType::NullPtr); 407} 408 409Diagnostic &ASTContext::getDiagnostics() const { 410 return SourceMgr.getDiagnostics(); 411} 412 413AttrVec& ASTContext::getDeclAttrs(const Decl *D) { 414 AttrVec *&Result = DeclAttrs[D]; 415 if (!Result) { 416 void *Mem = Allocate(sizeof(AttrVec)); 417 Result = new (Mem) AttrVec; 418 } 419 420 return *Result; 421} 422 423/// \brief Erase the attributes corresponding to the given declaration. 424void ASTContext::eraseDeclAttrs(const Decl *D) { 425 llvm::DenseMap<const Decl*, AttrVec*>::iterator Pos = DeclAttrs.find(D); 426 if (Pos != DeclAttrs.end()) { 427 Pos->second->~AttrVec(); 428 DeclAttrs.erase(Pos); 429 } 430} 431 432 433MemberSpecializationInfo * 434ASTContext::getInstantiatedFromStaticDataMember(const VarDecl *Var) { 435 assert(Var->isStaticDataMember() && "Not a static data member"); 436 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *>::iterator Pos 437 = InstantiatedFromStaticDataMember.find(Var); 438 if (Pos == InstantiatedFromStaticDataMember.end()) 439 return 0; 440 441 return Pos->second; 442} 443 444void 445ASTContext::setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 446 TemplateSpecializationKind TSK, 447 SourceLocation PointOfInstantiation) { 448 assert(Inst->isStaticDataMember() && "Not a static data member"); 449 assert(Tmpl->isStaticDataMember() && "Not a static data member"); 450 assert(!InstantiatedFromStaticDataMember[Inst] && 451 "Already noted what static data member was instantiated from"); 452 InstantiatedFromStaticDataMember[Inst] 453 = new (*this) MemberSpecializationInfo(Tmpl, TSK, PointOfInstantiation); 454} 455 456NamedDecl * 457ASTContext::getInstantiatedFromUsingDecl(UsingDecl *UUD) { 458 llvm::DenseMap<UsingDecl *, NamedDecl *>::const_iterator Pos 459 = InstantiatedFromUsingDecl.find(UUD); 460 if (Pos == InstantiatedFromUsingDecl.end()) 461 return 0; 462 463 return Pos->second; 464} 465 466void 467ASTContext::setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern) { 468 assert((isa<UsingDecl>(Pattern) || 469 isa<UnresolvedUsingValueDecl>(Pattern) || 470 isa<UnresolvedUsingTypenameDecl>(Pattern)) && 471 "pattern decl is not a using decl"); 472 assert(!InstantiatedFromUsingDecl[Inst] && "pattern already exists"); 473 InstantiatedFromUsingDecl[Inst] = Pattern; 474} 475 476UsingShadowDecl * 477ASTContext::getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst) { 478 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*>::const_iterator Pos 479 = InstantiatedFromUsingShadowDecl.find(Inst); 480 if (Pos == InstantiatedFromUsingShadowDecl.end()) 481 return 0; 482 483 return Pos->second; 484} 485 486void 487ASTContext::setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 488 UsingShadowDecl *Pattern) { 489 assert(!InstantiatedFromUsingShadowDecl[Inst] && "pattern already exists"); 490 InstantiatedFromUsingShadowDecl[Inst] = Pattern; 491} 492 493FieldDecl *ASTContext::getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field) { 494 llvm::DenseMap<FieldDecl *, FieldDecl *>::iterator Pos 495 = InstantiatedFromUnnamedFieldDecl.find(Field); 496 if (Pos == InstantiatedFromUnnamedFieldDecl.end()) 497 return 0; 498 499 return Pos->second; 500} 501 502void ASTContext::setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, 503 FieldDecl *Tmpl) { 504 assert(!Inst->getDeclName() && "Instantiated field decl is not unnamed"); 505 assert(!Tmpl->getDeclName() && "Template field decl is not unnamed"); 506 assert(!InstantiatedFromUnnamedFieldDecl[Inst] && 507 "Already noted what unnamed field was instantiated from"); 508 509 InstantiatedFromUnnamedFieldDecl[Inst] = Tmpl; 510} 511 512ASTContext::overridden_cxx_method_iterator 513ASTContext::overridden_methods_begin(const CXXMethodDecl *Method) const { 514 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 515 = OverriddenMethods.find(Method); 516 if (Pos == OverriddenMethods.end()) 517 return 0; 518 519 return Pos->second.begin(); 520} 521 522ASTContext::overridden_cxx_method_iterator 523ASTContext::overridden_methods_end(const CXXMethodDecl *Method) const { 524 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 525 = OverriddenMethods.find(Method); 526 if (Pos == OverriddenMethods.end()) 527 return 0; 528 529 return Pos->second.end(); 530} 531 532unsigned 533ASTContext::overridden_methods_size(const CXXMethodDecl *Method) const { 534 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 535 = OverriddenMethods.find(Method); 536 if (Pos == OverriddenMethods.end()) 537 return 0; 538 539 return Pos->second.size(); 540} 541 542void ASTContext::addOverriddenMethod(const CXXMethodDecl *Method, 543 const CXXMethodDecl *Overridden) { 544 OverriddenMethods[Method].push_back(Overridden); 545} 546 547//===----------------------------------------------------------------------===// 548// Type Sizing and Analysis 549//===----------------------------------------------------------------------===// 550 551/// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 552/// scalar floating point type. 553const llvm::fltSemantics &ASTContext::getFloatTypeSemantics(QualType T) const { 554 const BuiltinType *BT = T->getAs<BuiltinType>(); 555 assert(BT && "Not a floating point type!"); 556 switch (BT->getKind()) { 557 default: assert(0 && "Not a floating point type!"); 558 case BuiltinType::Float: return Target.getFloatFormat(); 559 case BuiltinType::Double: return Target.getDoubleFormat(); 560 case BuiltinType::LongDouble: return Target.getLongDoubleFormat(); 561 } 562} 563 564/// getDeclAlign - Return a conservative estimate of the alignment of the 565/// specified decl. Note that bitfields do not have a valid alignment, so 566/// this method will assert on them. 567/// If @p RefAsPointee, references are treated like their underlying type 568/// (for alignof), else they're treated like pointers (for CodeGen). 569CharUnits ASTContext::getDeclAlign(const Decl *D, bool RefAsPointee) const { 570 unsigned Align = Target.getCharWidth(); 571 572 bool UseAlignAttrOnly = false; 573 if (unsigned AlignFromAttr = D->getMaxAlignment()) { 574 Align = AlignFromAttr; 575 576 // __attribute__((aligned)) can increase or decrease alignment 577 // *except* on a struct or struct member, where it only increases 578 // alignment unless 'packed' is also specified. 579 // 580 // It is an error for [[align]] to decrease alignment, so we can 581 // ignore that possibility; Sema should diagnose it. 582 if (isa<FieldDecl>(D)) { 583 UseAlignAttrOnly = D->hasAttr<PackedAttr>() || 584 cast<FieldDecl>(D)->getParent()->hasAttr<PackedAttr>(); 585 } else { 586 UseAlignAttrOnly = true; 587 } 588 } 589 590 // If we're using the align attribute only, just ignore everything 591 // else about the declaration and its type. 592 if (UseAlignAttrOnly) { 593 // do nothing 594 595 } else if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) { 596 QualType T = VD->getType(); 597 if (const ReferenceType* RT = T->getAs<ReferenceType>()) { 598 if (RefAsPointee) 599 T = RT->getPointeeType(); 600 else 601 T = getPointerType(RT->getPointeeType()); 602 } 603 if (!T->isIncompleteType() && !T->isFunctionType()) { 604 // Adjust alignments of declarations with array type by the 605 // large-array alignment on the target. 606 unsigned MinWidth = Target.getLargeArrayMinWidth(); 607 const ArrayType *arrayType; 608 if (MinWidth && (arrayType = getAsArrayType(T))) { 609 if (isa<VariableArrayType>(arrayType)) 610 Align = std::max(Align, Target.getLargeArrayAlign()); 611 else if (isa<ConstantArrayType>(arrayType) && 612 MinWidth <= getTypeSize(cast<ConstantArrayType>(arrayType))) 613 Align = std::max(Align, Target.getLargeArrayAlign()); 614 615 // Walk through any array types while we're at it. 616 T = getBaseElementType(arrayType); 617 } 618 Align = std::max(Align, getPreferredTypeAlign(T.getTypePtr())); 619 } 620 621 // Fields can be subject to extra alignment constraints, like if 622 // the field is packed, the struct is packed, or the struct has a 623 // a max-field-alignment constraint (#pragma pack). So calculate 624 // the actual alignment of the field within the struct, and then 625 // (as we're expected to) constrain that by the alignment of the type. 626 if (const FieldDecl *field = dyn_cast<FieldDecl>(VD)) { 627 // So calculate the alignment of the field. 628 const ASTRecordLayout &layout = getASTRecordLayout(field->getParent()); 629 630 // Start with the record's overall alignment. 631 unsigned fieldAlign = toBits(layout.getAlignment()); 632 633 // Use the GCD of that and the offset within the record. 634 uint64_t offset = layout.getFieldOffset(field->getFieldIndex()); 635 if (offset > 0) { 636 // Alignment is always a power of 2, so the GCD will be a power of 2, 637 // which means we get to do this crazy thing instead of Euclid's. 638 uint64_t lowBitOfOffset = offset & (~offset + 1); 639 if (lowBitOfOffset < fieldAlign) 640 fieldAlign = static_cast<unsigned>(lowBitOfOffset); 641 } 642 643 Align = std::min(Align, fieldAlign); 644 } 645 } 646 647 return toCharUnitsFromBits(Align); 648} 649 650std::pair<CharUnits, CharUnits> 651ASTContext::getTypeInfoInChars(const Type *T) const { 652 std::pair<uint64_t, unsigned> Info = getTypeInfo(T); 653 return std::make_pair(toCharUnitsFromBits(Info.first), 654 toCharUnitsFromBits(Info.second)); 655} 656 657std::pair<CharUnits, CharUnits> 658ASTContext::getTypeInfoInChars(QualType T) const { 659 return getTypeInfoInChars(T.getTypePtr()); 660} 661 662/// getTypeSize - Return the size of the specified type, in bits. This method 663/// does not work on incomplete types. 664/// 665/// FIXME: Pointers into different addr spaces could have different sizes and 666/// alignment requirements: getPointerInfo should take an AddrSpace, this 667/// should take a QualType, &c. 668std::pair<uint64_t, unsigned> 669ASTContext::getTypeInfo(const Type *T) const { 670 uint64_t Width=0; 671 unsigned Align=8; 672 switch (T->getTypeClass()) { 673#define TYPE(Class, Base) 674#define ABSTRACT_TYPE(Class, Base) 675#define NON_CANONICAL_TYPE(Class, Base) 676#define DEPENDENT_TYPE(Class, Base) case Type::Class: 677#include "clang/AST/TypeNodes.def" 678 assert(false && "Should not see dependent types"); 679 break; 680 681 case Type::FunctionNoProto: 682 case Type::FunctionProto: 683 // GCC extension: alignof(function) = 32 bits 684 Width = 0; 685 Align = 32; 686 break; 687 688 case Type::IncompleteArray: 689 case Type::VariableArray: 690 Width = 0; 691 Align = getTypeAlign(cast<ArrayType>(T)->getElementType()); 692 break; 693 694 case Type::ConstantArray: { 695 const ConstantArrayType *CAT = cast<ConstantArrayType>(T); 696 697 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(CAT->getElementType()); 698 Width = EltInfo.first*CAT->getSize().getZExtValue(); 699 Align = EltInfo.second; 700 break; 701 } 702 case Type::ExtVector: 703 case Type::Vector: { 704 const VectorType *VT = cast<VectorType>(T); 705 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(VT->getElementType()); 706 Width = EltInfo.first*VT->getNumElements(); 707 Align = Width; 708 // If the alignment is not a power of 2, round up to the next power of 2. 709 // This happens for non-power-of-2 length vectors. 710 if (Align & (Align-1)) { 711 Align = llvm::NextPowerOf2(Align); 712 Width = llvm::RoundUpToAlignment(Width, Align); 713 } 714 break; 715 } 716 717 case Type::Builtin: 718 switch (cast<BuiltinType>(T)->getKind()) { 719 default: assert(0 && "Unknown builtin type!"); 720 case BuiltinType::Void: 721 // GCC extension: alignof(void) = 8 bits. 722 Width = 0; 723 Align = 8; 724 break; 725 726 case BuiltinType::Bool: 727 Width = Target.getBoolWidth(); 728 Align = Target.getBoolAlign(); 729 break; 730 case BuiltinType::Char_S: 731 case BuiltinType::Char_U: 732 case BuiltinType::UChar: 733 case BuiltinType::SChar: 734 Width = Target.getCharWidth(); 735 Align = Target.getCharAlign(); 736 break; 737 case BuiltinType::WChar_S: 738 case BuiltinType::WChar_U: 739 Width = Target.getWCharWidth(); 740 Align = Target.getWCharAlign(); 741 break; 742 case BuiltinType::Char16: 743 Width = Target.getChar16Width(); 744 Align = Target.getChar16Align(); 745 break; 746 case BuiltinType::Char32: 747 Width = Target.getChar32Width(); 748 Align = Target.getChar32Align(); 749 break; 750 case BuiltinType::UShort: 751 case BuiltinType::Short: 752 Width = Target.getShortWidth(); 753 Align = Target.getShortAlign(); 754 break; 755 case BuiltinType::UInt: 756 case BuiltinType::Int: 757 Width = Target.getIntWidth(); 758 Align = Target.getIntAlign(); 759 break; 760 case BuiltinType::ULong: 761 case BuiltinType::Long: 762 Width = Target.getLongWidth(); 763 Align = Target.getLongAlign(); 764 break; 765 case BuiltinType::ULongLong: 766 case BuiltinType::LongLong: 767 Width = Target.getLongLongWidth(); 768 Align = Target.getLongLongAlign(); 769 break; 770 case BuiltinType::Int128: 771 case BuiltinType::UInt128: 772 Width = 128; 773 Align = 128; // int128_t is 128-bit aligned on all targets. 774 break; 775 case BuiltinType::Float: 776 Width = Target.getFloatWidth(); 777 Align = Target.getFloatAlign(); 778 break; 779 case BuiltinType::Double: 780 Width = Target.getDoubleWidth(); 781 Align = Target.getDoubleAlign(); 782 break; 783 case BuiltinType::LongDouble: 784 Width = Target.getLongDoubleWidth(); 785 Align = Target.getLongDoubleAlign(); 786 break; 787 case BuiltinType::NullPtr: 788 Width = Target.getPointerWidth(0); // C++ 3.9.1p11: sizeof(nullptr_t) 789 Align = Target.getPointerAlign(0); // == sizeof(void*) 790 break; 791 case BuiltinType::ObjCId: 792 case BuiltinType::ObjCClass: 793 case BuiltinType::ObjCSel: 794 Width = Target.getPointerWidth(0); 795 Align = Target.getPointerAlign(0); 796 break; 797 } 798 break; 799 case Type::ObjCObjectPointer: 800 Width = Target.getPointerWidth(0); 801 Align = Target.getPointerAlign(0); 802 break; 803 case Type::BlockPointer: { 804 unsigned AS = cast<BlockPointerType>(T)->getPointeeType().getAddressSpace(); 805 Width = Target.getPointerWidth(AS); 806 Align = Target.getPointerAlign(AS); 807 break; 808 } 809 case Type::LValueReference: 810 case Type::RValueReference: { 811 // alignof and sizeof should never enter this code path here, so we go 812 // the pointer route. 813 unsigned AS = cast<ReferenceType>(T)->getPointeeType().getAddressSpace(); 814 Width = Target.getPointerWidth(AS); 815 Align = Target.getPointerAlign(AS); 816 break; 817 } 818 case Type::Pointer: { 819 unsigned AS = cast<PointerType>(T)->getPointeeType().getAddressSpace(); 820 Width = Target.getPointerWidth(AS); 821 Align = Target.getPointerAlign(AS); 822 break; 823 } 824 case Type::MemberPointer: { 825 const MemberPointerType *MPT = cast<MemberPointerType>(T); 826 std::pair<uint64_t, unsigned> PtrDiffInfo = 827 getTypeInfo(getPointerDiffType()); 828 Width = PtrDiffInfo.first * ABI->getMemberPointerSize(MPT); 829 Align = PtrDiffInfo.second; 830 break; 831 } 832 case Type::Complex: { 833 // Complex types have the same alignment as their elements, but twice the 834 // size. 835 std::pair<uint64_t, unsigned> EltInfo = 836 getTypeInfo(cast<ComplexType>(T)->getElementType()); 837 Width = EltInfo.first*2; 838 Align = EltInfo.second; 839 break; 840 } 841 case Type::ObjCObject: 842 return getTypeInfo(cast<ObjCObjectType>(T)->getBaseType().getTypePtr()); 843 case Type::ObjCInterface: { 844 const ObjCInterfaceType *ObjCI = cast<ObjCInterfaceType>(T); 845 const ASTRecordLayout &Layout = getASTObjCInterfaceLayout(ObjCI->getDecl()); 846 Width = toBits(Layout.getSize()); 847 Align = toBits(Layout.getAlignment()); 848 break; 849 } 850 case Type::Record: 851 case Type::Enum: { 852 const TagType *TT = cast<TagType>(T); 853 854 if (TT->getDecl()->isInvalidDecl()) { 855 Width = 1; 856 Align = 1; 857 break; 858 } 859 860 if (const EnumType *ET = dyn_cast<EnumType>(TT)) 861 return getTypeInfo(ET->getDecl()->getIntegerType()); 862 863 const RecordType *RT = cast<RecordType>(TT); 864 const ASTRecordLayout &Layout = getASTRecordLayout(RT->getDecl()); 865 Width = toBits(Layout.getSize()); 866 Align = toBits(Layout.getAlignment()); 867 break; 868 } 869 870 case Type::SubstTemplateTypeParm: 871 return getTypeInfo(cast<SubstTemplateTypeParmType>(T)-> 872 getReplacementType().getTypePtr()); 873 874 case Type::Auto: { 875 const AutoType *A = cast<AutoType>(T); 876 assert(A->isDeduced() && "Cannot request the size of a dependent type"); 877 return getTypeInfo(A->getDeducedType().getTypePtr()); 878 } 879 880 case Type::Paren: 881 return getTypeInfo(cast<ParenType>(T)->getInnerType().getTypePtr()); 882 883 case Type::Typedef: { 884 const TypedefDecl *Typedef = cast<TypedefType>(T)->getDecl(); 885 std::pair<uint64_t, unsigned> Info 886 = getTypeInfo(Typedef->getUnderlyingType().getTypePtr()); 887 // If the typedef has an aligned attribute on it, it overrides any computed 888 // alignment we have. This violates the GCC documentation (which says that 889 // attribute(aligned) can only round up) but matches its implementation. 890 if (unsigned AttrAlign = Typedef->getMaxAlignment()) 891 Align = AttrAlign; 892 else 893 Align = Info.second; 894 Width = Info.first; 895 break; 896 } 897 898 case Type::TypeOfExpr: 899 return getTypeInfo(cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType() 900 .getTypePtr()); 901 902 case Type::TypeOf: 903 return getTypeInfo(cast<TypeOfType>(T)->getUnderlyingType().getTypePtr()); 904 905 case Type::Decltype: 906 return getTypeInfo(cast<DecltypeType>(T)->getUnderlyingExpr()->getType() 907 .getTypePtr()); 908 909 case Type::Elaborated: 910 return getTypeInfo(cast<ElaboratedType>(T)->getNamedType().getTypePtr()); 911 912 case Type::Attributed: 913 return getTypeInfo( 914 cast<AttributedType>(T)->getEquivalentType().getTypePtr()); 915 916 case Type::TemplateSpecialization: 917 assert(getCanonicalType(T) != T && 918 "Cannot request the size of a dependent type"); 919 // FIXME: this is likely to be wrong once we support template 920 // aliases, since a template alias could refer to a typedef that 921 // has an __aligned__ attribute on it. 922 return getTypeInfo(getCanonicalType(T)); 923 } 924 925 assert(Align && (Align & (Align-1)) == 0 && "Alignment must be power of 2"); 926 return std::make_pair(Width, Align); 927} 928 929/// toCharUnitsFromBits - Convert a size in bits to a size in characters. 930CharUnits ASTContext::toCharUnitsFromBits(int64_t BitSize) const { 931 return CharUnits::fromQuantity(BitSize / getCharWidth()); 932} 933 934/// toBits - Convert a size in characters to a size in characters. 935int64_t ASTContext::toBits(CharUnits CharSize) const { 936 return CharSize.getQuantity() * getCharWidth(); 937} 938 939/// getTypeSizeInChars - Return the size of the specified type, in characters. 940/// This method does not work on incomplete types. 941CharUnits ASTContext::getTypeSizeInChars(QualType T) const { 942 return toCharUnitsFromBits(getTypeSize(T)); 943} 944CharUnits ASTContext::getTypeSizeInChars(const Type *T) const { 945 return toCharUnitsFromBits(getTypeSize(T)); 946} 947 948/// getTypeAlignInChars - Return the ABI-specified alignment of a type, in 949/// characters. This method does not work on incomplete types. 950CharUnits ASTContext::getTypeAlignInChars(QualType T) const { 951 return toCharUnitsFromBits(getTypeAlign(T)); 952} 953CharUnits ASTContext::getTypeAlignInChars(const Type *T) const { 954 return toCharUnitsFromBits(getTypeAlign(T)); 955} 956 957/// getPreferredTypeAlign - Return the "preferred" alignment of the specified 958/// type for the current target in bits. This can be different than the ABI 959/// alignment in cases where it is beneficial for performance to overalign 960/// a data type. 961unsigned ASTContext::getPreferredTypeAlign(const Type *T) const { 962 unsigned ABIAlign = getTypeAlign(T); 963 964 // Double and long long should be naturally aligned if possible. 965 if (const ComplexType* CT = T->getAs<ComplexType>()) 966 T = CT->getElementType().getTypePtr(); 967 if (T->isSpecificBuiltinType(BuiltinType::Double) || 968 T->isSpecificBuiltinType(BuiltinType::LongLong)) 969 return std::max(ABIAlign, (unsigned)getTypeSize(T)); 970 971 return ABIAlign; 972} 973 974/// ShallowCollectObjCIvars - 975/// Collect all ivars, including those synthesized, in the current class. 976/// 977void ASTContext::ShallowCollectObjCIvars(const ObjCInterfaceDecl *OI, 978 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) const { 979 // FIXME. This need be removed but there are two many places which 980 // assume const-ness of ObjCInterfaceDecl 981 ObjCInterfaceDecl *IDecl = const_cast<ObjCInterfaceDecl *>(OI); 982 for (ObjCIvarDecl *Iv = IDecl->all_declared_ivar_begin(); Iv; 983 Iv= Iv->getNextIvar()) 984 Ivars.push_back(Iv); 985} 986 987/// DeepCollectObjCIvars - 988/// This routine first collects all declared, but not synthesized, ivars in 989/// super class and then collects all ivars, including those synthesized for 990/// current class. This routine is used for implementation of current class 991/// when all ivars, declared and synthesized are known. 992/// 993void ASTContext::DeepCollectObjCIvars(const ObjCInterfaceDecl *OI, 994 bool leafClass, 995 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) const { 996 if (const ObjCInterfaceDecl *SuperClass = OI->getSuperClass()) 997 DeepCollectObjCIvars(SuperClass, false, Ivars); 998 if (!leafClass) { 999 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 1000 E = OI->ivar_end(); I != E; ++I) 1001 Ivars.push_back(*I); 1002 } 1003 else 1004 ShallowCollectObjCIvars(OI, Ivars); 1005} 1006 1007/// CollectInheritedProtocols - Collect all protocols in current class and 1008/// those inherited by it. 1009void ASTContext::CollectInheritedProtocols(const Decl *CDecl, 1010 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols) { 1011 if (const ObjCInterfaceDecl *OI = dyn_cast<ObjCInterfaceDecl>(CDecl)) { 1012 // We can use protocol_iterator here instead of 1013 // all_referenced_protocol_iterator since we are walking all categories. 1014 for (ObjCInterfaceDecl::all_protocol_iterator P = OI->all_referenced_protocol_begin(), 1015 PE = OI->all_referenced_protocol_end(); P != PE; ++P) { 1016 ObjCProtocolDecl *Proto = (*P); 1017 Protocols.insert(Proto); 1018 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1019 PE = Proto->protocol_end(); P != PE; ++P) { 1020 Protocols.insert(*P); 1021 CollectInheritedProtocols(*P, Protocols); 1022 } 1023 } 1024 1025 // Categories of this Interface. 1026 for (const ObjCCategoryDecl *CDeclChain = OI->getCategoryList(); 1027 CDeclChain; CDeclChain = CDeclChain->getNextClassCategory()) 1028 CollectInheritedProtocols(CDeclChain, Protocols); 1029 if (ObjCInterfaceDecl *SD = OI->getSuperClass()) 1030 while (SD) { 1031 CollectInheritedProtocols(SD, Protocols); 1032 SD = SD->getSuperClass(); 1033 } 1034 } else if (const ObjCCategoryDecl *OC = dyn_cast<ObjCCategoryDecl>(CDecl)) { 1035 for (ObjCCategoryDecl::protocol_iterator P = OC->protocol_begin(), 1036 PE = OC->protocol_end(); P != PE; ++P) { 1037 ObjCProtocolDecl *Proto = (*P); 1038 Protocols.insert(Proto); 1039 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1040 PE = Proto->protocol_end(); P != PE; ++P) 1041 CollectInheritedProtocols(*P, Protocols); 1042 } 1043 } else if (const ObjCProtocolDecl *OP = dyn_cast<ObjCProtocolDecl>(CDecl)) { 1044 for (ObjCProtocolDecl::protocol_iterator P = OP->protocol_begin(), 1045 PE = OP->protocol_end(); P != PE; ++P) { 1046 ObjCProtocolDecl *Proto = (*P); 1047 Protocols.insert(Proto); 1048 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 1049 PE = Proto->protocol_end(); P != PE; ++P) 1050 CollectInheritedProtocols(*P, Protocols); 1051 } 1052 } 1053} 1054 1055unsigned ASTContext::CountNonClassIvars(const ObjCInterfaceDecl *OI) const { 1056 unsigned count = 0; 1057 // Count ivars declared in class extension. 1058 for (const ObjCCategoryDecl *CDecl = OI->getFirstClassExtension(); CDecl; 1059 CDecl = CDecl->getNextClassExtension()) 1060 count += CDecl->ivar_size(); 1061 1062 // Count ivar defined in this class's implementation. This 1063 // includes synthesized ivars. 1064 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) 1065 count += ImplDecl->ivar_size(); 1066 1067 return count; 1068} 1069 1070/// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 1071ObjCImplementationDecl *ASTContext::getObjCImplementation(ObjCInterfaceDecl *D) { 1072 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 1073 I = ObjCImpls.find(D); 1074 if (I != ObjCImpls.end()) 1075 return cast<ObjCImplementationDecl>(I->second); 1076 return 0; 1077} 1078/// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 1079ObjCCategoryImplDecl *ASTContext::getObjCImplementation(ObjCCategoryDecl *D) { 1080 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 1081 I = ObjCImpls.find(D); 1082 if (I != ObjCImpls.end()) 1083 return cast<ObjCCategoryImplDecl>(I->second); 1084 return 0; 1085} 1086 1087/// \brief Set the implementation of ObjCInterfaceDecl. 1088void ASTContext::setObjCImplementation(ObjCInterfaceDecl *IFaceD, 1089 ObjCImplementationDecl *ImplD) { 1090 assert(IFaceD && ImplD && "Passed null params"); 1091 ObjCImpls[IFaceD] = ImplD; 1092} 1093/// \brief Set the implementation of ObjCCategoryDecl. 1094void ASTContext::setObjCImplementation(ObjCCategoryDecl *CatD, 1095 ObjCCategoryImplDecl *ImplD) { 1096 assert(CatD && ImplD && "Passed null params"); 1097 ObjCImpls[CatD] = ImplD; 1098} 1099 1100/// \brief Get the copy initialization expression of VarDecl,or NULL if 1101/// none exists. 1102Expr *ASTContext::getBlockVarCopyInits(const VarDecl*VD) { 1103 assert(VD && "Passed null params"); 1104 assert(VD->hasAttr<BlocksAttr>() && 1105 "getBlockVarCopyInits - not __block var"); 1106 llvm::DenseMap<const VarDecl*, Expr*>::iterator 1107 I = BlockVarCopyInits.find(VD); 1108 return (I != BlockVarCopyInits.end()) ? cast<Expr>(I->second) : 0; 1109} 1110 1111/// \brief Set the copy inialization expression of a block var decl. 1112void ASTContext::setBlockVarCopyInits(VarDecl*VD, Expr* Init) { 1113 assert(VD && Init && "Passed null params"); 1114 assert(VD->hasAttr<BlocksAttr>() && 1115 "setBlockVarCopyInits - not __block var"); 1116 BlockVarCopyInits[VD] = Init; 1117} 1118 1119/// \brief Allocate an uninitialized TypeSourceInfo. 1120/// 1121/// The caller should initialize the memory held by TypeSourceInfo using 1122/// the TypeLoc wrappers. 1123/// 1124/// \param T the type that will be the basis for type source info. This type 1125/// should refer to how the declarator was written in source code, not to 1126/// what type semantic analysis resolved the declarator to. 1127TypeSourceInfo *ASTContext::CreateTypeSourceInfo(QualType T, 1128 unsigned DataSize) const { 1129 if (!DataSize) 1130 DataSize = TypeLoc::getFullDataSizeForType(T); 1131 else 1132 assert(DataSize == TypeLoc::getFullDataSizeForType(T) && 1133 "incorrect data size provided to CreateTypeSourceInfo!"); 1134 1135 TypeSourceInfo *TInfo = 1136 (TypeSourceInfo*)BumpAlloc.Allocate(sizeof(TypeSourceInfo) + DataSize, 8); 1137 new (TInfo) TypeSourceInfo(T); 1138 return TInfo; 1139} 1140 1141TypeSourceInfo *ASTContext::getTrivialTypeSourceInfo(QualType T, 1142 SourceLocation L) const { 1143 TypeSourceInfo *DI = CreateTypeSourceInfo(T); 1144 DI->getTypeLoc().initialize(const_cast<ASTContext &>(*this), L); 1145 return DI; 1146} 1147 1148const ASTRecordLayout & 1149ASTContext::getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) const { 1150 return getObjCLayout(D, 0); 1151} 1152 1153const ASTRecordLayout & 1154ASTContext::getASTObjCImplementationLayout( 1155 const ObjCImplementationDecl *D) const { 1156 return getObjCLayout(D->getClassInterface(), D); 1157} 1158 1159//===----------------------------------------------------------------------===// 1160// Type creation/memoization methods 1161//===----------------------------------------------------------------------===// 1162 1163QualType 1164ASTContext::getExtQualType(const Type *baseType, Qualifiers quals) const { 1165 unsigned fastQuals = quals.getFastQualifiers(); 1166 quals.removeFastQualifiers(); 1167 1168 // Check if we've already instantiated this type. 1169 llvm::FoldingSetNodeID ID; 1170 ExtQuals::Profile(ID, baseType, quals); 1171 void *insertPos = 0; 1172 if (ExtQuals *eq = ExtQualNodes.FindNodeOrInsertPos(ID, insertPos)) { 1173 assert(eq->getQualifiers() == quals); 1174 return QualType(eq, fastQuals); 1175 } 1176 1177 // If the base type is not canonical, make the appropriate canonical type. 1178 QualType canon; 1179 if (!baseType->isCanonicalUnqualified()) { 1180 SplitQualType canonSplit = baseType->getCanonicalTypeInternal().split(); 1181 canonSplit.second.addConsistentQualifiers(quals); 1182 canon = getExtQualType(canonSplit.first, canonSplit.second); 1183 1184 // Re-find the insert position. 1185 (void) ExtQualNodes.FindNodeOrInsertPos(ID, insertPos); 1186 } 1187 1188 ExtQuals *eq = new (*this, TypeAlignment) ExtQuals(baseType, canon, quals); 1189 ExtQualNodes.InsertNode(eq, insertPos); 1190 return QualType(eq, fastQuals); 1191} 1192 1193QualType 1194ASTContext::getAddrSpaceQualType(QualType T, unsigned AddressSpace) const { 1195 QualType CanT = getCanonicalType(T); 1196 if (CanT.getAddressSpace() == AddressSpace) 1197 return T; 1198 1199 // If we are composing extended qualifiers together, merge together 1200 // into one ExtQuals node. 1201 QualifierCollector Quals; 1202 const Type *TypeNode = Quals.strip(T); 1203 1204 // If this type already has an address space specified, it cannot get 1205 // another one. 1206 assert(!Quals.hasAddressSpace() && 1207 "Type cannot be in multiple addr spaces!"); 1208 Quals.addAddressSpace(AddressSpace); 1209 1210 return getExtQualType(TypeNode, Quals); 1211} 1212 1213QualType ASTContext::getObjCGCQualType(QualType T, 1214 Qualifiers::GC GCAttr) const { 1215 QualType CanT = getCanonicalType(T); 1216 if (CanT.getObjCGCAttr() == GCAttr) 1217 return T; 1218 1219 if (const PointerType *ptr = T->getAs<PointerType>()) { 1220 QualType Pointee = ptr->getPointeeType(); 1221 if (Pointee->isAnyPointerType()) { 1222 QualType ResultType = getObjCGCQualType(Pointee, GCAttr); 1223 return getPointerType(ResultType); 1224 } 1225 } 1226 1227 // If we are composing extended qualifiers together, merge together 1228 // into one ExtQuals node. 1229 QualifierCollector Quals; 1230 const Type *TypeNode = Quals.strip(T); 1231 1232 // If this type already has an ObjCGC specified, it cannot get 1233 // another one. 1234 assert(!Quals.hasObjCGCAttr() && 1235 "Type cannot have multiple ObjCGCs!"); 1236 Quals.addObjCGCAttr(GCAttr); 1237 1238 return getExtQualType(TypeNode, Quals); 1239} 1240 1241const FunctionType *ASTContext::adjustFunctionType(const FunctionType *T, 1242 FunctionType::ExtInfo Info) { 1243 if (T->getExtInfo() == Info) 1244 return T; 1245 1246 QualType Result; 1247 if (const FunctionNoProtoType *FNPT = dyn_cast<FunctionNoProtoType>(T)) { 1248 Result = getFunctionNoProtoType(FNPT->getResultType(), Info); 1249 } else { 1250 const FunctionProtoType *FPT = cast<FunctionProtoType>(T); 1251 FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); 1252 EPI.ExtInfo = Info; 1253 Result = getFunctionType(FPT->getResultType(), FPT->arg_type_begin(), 1254 FPT->getNumArgs(), EPI); 1255 } 1256 1257 return cast<FunctionType>(Result.getTypePtr()); 1258} 1259 1260/// getComplexType - Return the uniqued reference to the type for a complex 1261/// number with the specified element type. 1262QualType ASTContext::getComplexType(QualType T) const { 1263 // Unique pointers, to guarantee there is only one pointer of a particular 1264 // structure. 1265 llvm::FoldingSetNodeID ID; 1266 ComplexType::Profile(ID, T); 1267 1268 void *InsertPos = 0; 1269 if (ComplexType *CT = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos)) 1270 return QualType(CT, 0); 1271 1272 // If the pointee type isn't canonical, this won't be a canonical type either, 1273 // so fill in the canonical type field. 1274 QualType Canonical; 1275 if (!T.isCanonical()) { 1276 Canonical = getComplexType(getCanonicalType(T)); 1277 1278 // Get the new insert position for the node we care about. 1279 ComplexType *NewIP = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos); 1280 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1281 } 1282 ComplexType *New = new (*this, TypeAlignment) ComplexType(T, Canonical); 1283 Types.push_back(New); 1284 ComplexTypes.InsertNode(New, InsertPos); 1285 return QualType(New, 0); 1286} 1287 1288/// getPointerType - Return the uniqued reference to the type for a pointer to 1289/// the specified type. 1290QualType ASTContext::getPointerType(QualType T) const { 1291 // Unique pointers, to guarantee there is only one pointer of a particular 1292 // structure. 1293 llvm::FoldingSetNodeID ID; 1294 PointerType::Profile(ID, T); 1295 1296 void *InsertPos = 0; 1297 if (PointerType *PT = PointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1298 return QualType(PT, 0); 1299 1300 // If the pointee type isn't canonical, this won't be a canonical type either, 1301 // so fill in the canonical type field. 1302 QualType Canonical; 1303 if (!T.isCanonical()) { 1304 Canonical = getPointerType(getCanonicalType(T)); 1305 1306 // Get the new insert position for the node we care about. 1307 PointerType *NewIP = PointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1308 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1309 } 1310 PointerType *New = new (*this, TypeAlignment) PointerType(T, Canonical); 1311 Types.push_back(New); 1312 PointerTypes.InsertNode(New, InsertPos); 1313 return QualType(New, 0); 1314} 1315 1316/// getBlockPointerType - Return the uniqued reference to the type for 1317/// a pointer to the specified block. 1318QualType ASTContext::getBlockPointerType(QualType T) const { 1319 assert(T->isFunctionType() && "block of function types only"); 1320 // Unique pointers, to guarantee there is only one block of a particular 1321 // structure. 1322 llvm::FoldingSetNodeID ID; 1323 BlockPointerType::Profile(ID, T); 1324 1325 void *InsertPos = 0; 1326 if (BlockPointerType *PT = 1327 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1328 return QualType(PT, 0); 1329 1330 // If the block pointee type isn't canonical, this won't be a canonical 1331 // type either so fill in the canonical type field. 1332 QualType Canonical; 1333 if (!T.isCanonical()) { 1334 Canonical = getBlockPointerType(getCanonicalType(T)); 1335 1336 // Get the new insert position for the node we care about. 1337 BlockPointerType *NewIP = 1338 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1339 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1340 } 1341 BlockPointerType *New 1342 = new (*this, TypeAlignment) BlockPointerType(T, Canonical); 1343 Types.push_back(New); 1344 BlockPointerTypes.InsertNode(New, InsertPos); 1345 return QualType(New, 0); 1346} 1347 1348/// getLValueReferenceType - Return the uniqued reference to the type for an 1349/// lvalue reference to the specified type. 1350QualType 1351ASTContext::getLValueReferenceType(QualType T, bool SpelledAsLValue) const { 1352 // Unique pointers, to guarantee there is only one pointer of a particular 1353 // structure. 1354 llvm::FoldingSetNodeID ID; 1355 ReferenceType::Profile(ID, T, SpelledAsLValue); 1356 1357 void *InsertPos = 0; 1358 if (LValueReferenceType *RT = 1359 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1360 return QualType(RT, 0); 1361 1362 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1363 1364 // If the referencee type isn't canonical, this won't be a canonical type 1365 // either, so fill in the canonical type field. 1366 QualType Canonical; 1367 if (!SpelledAsLValue || InnerRef || !T.isCanonical()) { 1368 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1369 Canonical = getLValueReferenceType(getCanonicalType(PointeeType)); 1370 1371 // Get the new insert position for the node we care about. 1372 LValueReferenceType *NewIP = 1373 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1374 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1375 } 1376 1377 LValueReferenceType *New 1378 = new (*this, TypeAlignment) LValueReferenceType(T, Canonical, 1379 SpelledAsLValue); 1380 Types.push_back(New); 1381 LValueReferenceTypes.InsertNode(New, InsertPos); 1382 1383 return QualType(New, 0); 1384} 1385 1386/// getRValueReferenceType - Return the uniqued reference to the type for an 1387/// rvalue reference to the specified type. 1388QualType ASTContext::getRValueReferenceType(QualType T) const { 1389 // Unique pointers, to guarantee there is only one pointer of a particular 1390 // structure. 1391 llvm::FoldingSetNodeID ID; 1392 ReferenceType::Profile(ID, T, false); 1393 1394 void *InsertPos = 0; 1395 if (RValueReferenceType *RT = 1396 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1397 return QualType(RT, 0); 1398 1399 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1400 1401 // If the referencee type isn't canonical, this won't be a canonical type 1402 // either, so fill in the canonical type field. 1403 QualType Canonical; 1404 if (InnerRef || !T.isCanonical()) { 1405 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1406 Canonical = getRValueReferenceType(getCanonicalType(PointeeType)); 1407 1408 // Get the new insert position for the node we care about. 1409 RValueReferenceType *NewIP = 1410 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1411 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1412 } 1413 1414 RValueReferenceType *New 1415 = new (*this, TypeAlignment) RValueReferenceType(T, Canonical); 1416 Types.push_back(New); 1417 RValueReferenceTypes.InsertNode(New, InsertPos); 1418 return QualType(New, 0); 1419} 1420 1421/// getMemberPointerType - Return the uniqued reference to the type for a 1422/// member pointer to the specified type, in the specified class. 1423QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls) const { 1424 // Unique pointers, to guarantee there is only one pointer of a particular 1425 // structure. 1426 llvm::FoldingSetNodeID ID; 1427 MemberPointerType::Profile(ID, T, Cls); 1428 1429 void *InsertPos = 0; 1430 if (MemberPointerType *PT = 1431 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1432 return QualType(PT, 0); 1433 1434 // If the pointee or class type isn't canonical, this won't be a canonical 1435 // type either, so fill in the canonical type field. 1436 QualType Canonical; 1437 if (!T.isCanonical() || !Cls->isCanonicalUnqualified()) { 1438 Canonical = getMemberPointerType(getCanonicalType(T),getCanonicalType(Cls)); 1439 1440 // Get the new insert position for the node we care about. 1441 MemberPointerType *NewIP = 1442 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1443 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1444 } 1445 MemberPointerType *New 1446 = new (*this, TypeAlignment) MemberPointerType(T, Cls, Canonical); 1447 Types.push_back(New); 1448 MemberPointerTypes.InsertNode(New, InsertPos); 1449 return QualType(New, 0); 1450} 1451 1452/// getConstantArrayType - Return the unique reference to the type for an 1453/// array of the specified element type. 1454QualType ASTContext::getConstantArrayType(QualType EltTy, 1455 const llvm::APInt &ArySizeIn, 1456 ArrayType::ArraySizeModifier ASM, 1457 unsigned IndexTypeQuals) const { 1458 assert((EltTy->isDependentType() || 1459 EltTy->isIncompleteType() || EltTy->isConstantSizeType()) && 1460 "Constant array of VLAs is illegal!"); 1461 1462 // Convert the array size into a canonical width matching the pointer size for 1463 // the target. 1464 llvm::APInt ArySize(ArySizeIn); 1465 ArySize = 1466 ArySize.zextOrTrunc(Target.getPointerWidth(EltTy.getAddressSpace())); 1467 1468 llvm::FoldingSetNodeID ID; 1469 ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, IndexTypeQuals); 1470 1471 void *InsertPos = 0; 1472 if (ConstantArrayType *ATP = 1473 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1474 return QualType(ATP, 0); 1475 1476 // If the element type isn't canonical or has qualifiers, this won't 1477 // be a canonical type either, so fill in the canonical type field. 1478 QualType Canon; 1479 if (!EltTy.isCanonical() || EltTy.hasLocalQualifiers()) { 1480 SplitQualType canonSplit = getCanonicalType(EltTy).split(); 1481 Canon = getConstantArrayType(QualType(canonSplit.first, 0), ArySize, 1482 ASM, IndexTypeQuals); 1483 Canon = getQualifiedType(Canon, canonSplit.second); 1484 1485 // Get the new insert position for the node we care about. 1486 ConstantArrayType *NewIP = 1487 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1488 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1489 } 1490 1491 ConstantArrayType *New = new(*this,TypeAlignment) 1492 ConstantArrayType(EltTy, Canon, ArySize, ASM, IndexTypeQuals); 1493 ConstantArrayTypes.InsertNode(New, InsertPos); 1494 Types.push_back(New); 1495 return QualType(New, 0); 1496} 1497 1498/// getVariableArrayDecayedType - Turns the given type, which may be 1499/// variably-modified, into the corresponding type with all the known 1500/// sizes replaced with [*]. 1501QualType ASTContext::getVariableArrayDecayedType(QualType type) const { 1502 // Vastly most common case. 1503 if (!type->isVariablyModifiedType()) return type; 1504 1505 QualType result; 1506 1507 SplitQualType split = type.getSplitDesugaredType(); 1508 const Type *ty = split.first; 1509 switch (ty->getTypeClass()) { 1510#define TYPE(Class, Base) 1511#define ABSTRACT_TYPE(Class, Base) 1512#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 1513#include "clang/AST/TypeNodes.def" 1514 llvm_unreachable("didn't desugar past all non-canonical types?"); 1515 1516 // These types should never be variably-modified. 1517 case Type::Builtin: 1518 case Type::Complex: 1519 case Type::Vector: 1520 case Type::ExtVector: 1521 case Type::DependentSizedExtVector: 1522 case Type::ObjCObject: 1523 case Type::ObjCInterface: 1524 case Type::ObjCObjectPointer: 1525 case Type::Record: 1526 case Type::Enum: 1527 case Type::UnresolvedUsing: 1528 case Type::TypeOfExpr: 1529 case Type::TypeOf: 1530 case Type::Decltype: 1531 case Type::DependentName: 1532 case Type::InjectedClassName: 1533 case Type::TemplateSpecialization: 1534 case Type::DependentTemplateSpecialization: 1535 case Type::TemplateTypeParm: 1536 case Type::SubstTemplateTypeParmPack: 1537 case Type::Auto: 1538 case Type::PackExpansion: 1539 llvm_unreachable("type should never be variably-modified"); 1540 1541 // These types can be variably-modified but should never need to 1542 // further decay. 1543 case Type::FunctionNoProto: 1544 case Type::FunctionProto: 1545 case Type::BlockPointer: 1546 case Type::MemberPointer: 1547 return type; 1548 1549 // These types can be variably-modified. All these modifications 1550 // preserve structure except as noted by comments. 1551 // TODO: if we ever care about optimizing VLAs, there are no-op 1552 // optimizations available here. 1553 case Type::Pointer: 1554 result = getPointerType(getVariableArrayDecayedType( 1555 cast<PointerType>(ty)->getPointeeType())); 1556 break; 1557 1558 case Type::LValueReference: { 1559 const LValueReferenceType *lv = cast<LValueReferenceType>(ty); 1560 result = getLValueReferenceType( 1561 getVariableArrayDecayedType(lv->getPointeeType()), 1562 lv->isSpelledAsLValue()); 1563 break; 1564 } 1565 1566 case Type::RValueReference: { 1567 const RValueReferenceType *lv = cast<RValueReferenceType>(ty); 1568 result = getRValueReferenceType( 1569 getVariableArrayDecayedType(lv->getPointeeType())); 1570 break; 1571 } 1572 1573 case Type::ConstantArray: { 1574 const ConstantArrayType *cat = cast<ConstantArrayType>(ty); 1575 result = getConstantArrayType( 1576 getVariableArrayDecayedType(cat->getElementType()), 1577 cat->getSize(), 1578 cat->getSizeModifier(), 1579 cat->getIndexTypeCVRQualifiers()); 1580 break; 1581 } 1582 1583 case Type::DependentSizedArray: { 1584 const DependentSizedArrayType *dat = cast<DependentSizedArrayType>(ty); 1585 result = getDependentSizedArrayType( 1586 getVariableArrayDecayedType(dat->getElementType()), 1587 dat->getSizeExpr(), 1588 dat->getSizeModifier(), 1589 dat->getIndexTypeCVRQualifiers(), 1590 dat->getBracketsRange()); 1591 break; 1592 } 1593 1594 // Turn incomplete types into [*] types. 1595 case Type::IncompleteArray: { 1596 const IncompleteArrayType *iat = cast<IncompleteArrayType>(ty); 1597 result = getVariableArrayType( 1598 getVariableArrayDecayedType(iat->getElementType()), 1599 /*size*/ 0, 1600 ArrayType::Normal, 1601 iat->getIndexTypeCVRQualifiers(), 1602 SourceRange()); 1603 break; 1604 } 1605 1606 // Turn VLA types into [*] types. 1607 case Type::VariableArray: { 1608 const VariableArrayType *vat = cast<VariableArrayType>(ty); 1609 result = getVariableArrayType( 1610 getVariableArrayDecayedType(vat->getElementType()), 1611 /*size*/ 0, 1612 ArrayType::Star, 1613 vat->getIndexTypeCVRQualifiers(), 1614 vat->getBracketsRange()); 1615 break; 1616 } 1617 } 1618 1619 // Apply the top-level qualifiers from the original. 1620 return getQualifiedType(result, split.second); 1621} 1622 1623/// getVariableArrayType - Returns a non-unique reference to the type for a 1624/// variable array of the specified element type. 1625QualType ASTContext::getVariableArrayType(QualType EltTy, 1626 Expr *NumElts, 1627 ArrayType::ArraySizeModifier ASM, 1628 unsigned IndexTypeQuals, 1629 SourceRange Brackets) const { 1630 // Since we don't unique expressions, it isn't possible to unique VLA's 1631 // that have an expression provided for their size. 1632 QualType Canon; 1633 1634 // Be sure to pull qualifiers off the element type. 1635 if (!EltTy.isCanonical() || EltTy.hasLocalQualifiers()) { 1636 SplitQualType canonSplit = getCanonicalType(EltTy).split(); 1637 Canon = getVariableArrayType(QualType(canonSplit.first, 0), NumElts, ASM, 1638 IndexTypeQuals, Brackets); 1639 Canon = getQualifiedType(Canon, canonSplit.second); 1640 } 1641 1642 VariableArrayType *New = new(*this, TypeAlignment) 1643 VariableArrayType(EltTy, Canon, NumElts, ASM, IndexTypeQuals, Brackets); 1644 1645 VariableArrayTypes.push_back(New); 1646 Types.push_back(New); 1647 return QualType(New, 0); 1648} 1649 1650/// getDependentSizedArrayType - Returns a non-unique reference to 1651/// the type for a dependently-sized array of the specified element 1652/// type. 1653QualType ASTContext::getDependentSizedArrayType(QualType elementType, 1654 Expr *numElements, 1655 ArrayType::ArraySizeModifier ASM, 1656 unsigned elementTypeQuals, 1657 SourceRange brackets) const { 1658 assert((!numElements || numElements->isTypeDependent() || 1659 numElements->isValueDependent()) && 1660 "Size must be type- or value-dependent!"); 1661 1662 // Dependently-sized array types that do not have a specified number 1663 // of elements will have their sizes deduced from a dependent 1664 // initializer. We do no canonicalization here at all, which is okay 1665 // because they can't be used in most locations. 1666 if (!numElements) { 1667 DependentSizedArrayType *newType 1668 = new (*this, TypeAlignment) 1669 DependentSizedArrayType(*this, elementType, QualType(), 1670 numElements, ASM, elementTypeQuals, 1671 brackets); 1672 Types.push_back(newType); 1673 return QualType(newType, 0); 1674 } 1675 1676 // Otherwise, we actually build a new type every time, but we 1677 // also build a canonical type. 1678 1679 SplitQualType canonElementType = getCanonicalType(elementType).split(); 1680 1681 void *insertPos = 0; 1682 llvm::FoldingSetNodeID ID; 1683 DependentSizedArrayType::Profile(ID, *this, 1684 QualType(canonElementType.first, 0), 1685 ASM, elementTypeQuals, numElements); 1686 1687 // Look for an existing type with these properties. 1688 DependentSizedArrayType *canonTy = 1689 DependentSizedArrayTypes.FindNodeOrInsertPos(ID, insertPos); 1690 1691 // If we don't have one, build one. 1692 if (!canonTy) { 1693 canonTy = new (*this, TypeAlignment) 1694 DependentSizedArrayType(*this, QualType(canonElementType.first, 0), 1695 QualType(), numElements, ASM, elementTypeQuals, 1696 brackets); 1697 DependentSizedArrayTypes.InsertNode(canonTy, insertPos); 1698 Types.push_back(canonTy); 1699 } 1700 1701 // Apply qualifiers from the element type to the array. 1702 QualType canon = getQualifiedType(QualType(canonTy,0), 1703 canonElementType.second); 1704 1705 // If we didn't need extra canonicalization for the element type, 1706 // then just use that as our result. 1707 if (QualType(canonElementType.first, 0) == elementType) 1708 return canon; 1709 1710 // Otherwise, we need to build a type which follows the spelling 1711 // of the element type. 1712 DependentSizedArrayType *sugaredType 1713 = new (*this, TypeAlignment) 1714 DependentSizedArrayType(*this, elementType, canon, numElements, 1715 ASM, elementTypeQuals, brackets); 1716 Types.push_back(sugaredType); 1717 return QualType(sugaredType, 0); 1718} 1719 1720QualType ASTContext::getIncompleteArrayType(QualType elementType, 1721 ArrayType::ArraySizeModifier ASM, 1722 unsigned elementTypeQuals) const { 1723 llvm::FoldingSetNodeID ID; 1724 IncompleteArrayType::Profile(ID, elementType, ASM, elementTypeQuals); 1725 1726 void *insertPos = 0; 1727 if (IncompleteArrayType *iat = 1728 IncompleteArrayTypes.FindNodeOrInsertPos(ID, insertPos)) 1729 return QualType(iat, 0); 1730 1731 // If the element type isn't canonical, this won't be a canonical type 1732 // either, so fill in the canonical type field. We also have to pull 1733 // qualifiers off the element type. 1734 QualType canon; 1735 1736 if (!elementType.isCanonical() || elementType.hasLocalQualifiers()) { 1737 SplitQualType canonSplit = getCanonicalType(elementType).split(); 1738 canon = getIncompleteArrayType(QualType(canonSplit.first, 0), 1739 ASM, elementTypeQuals); 1740 canon = getQualifiedType(canon, canonSplit.second); 1741 1742 // Get the new insert position for the node we care about. 1743 IncompleteArrayType *existing = 1744 IncompleteArrayTypes.FindNodeOrInsertPos(ID, insertPos); 1745 assert(!existing && "Shouldn't be in the map!"); (void) existing; 1746 } 1747 1748 IncompleteArrayType *newType = new (*this, TypeAlignment) 1749 IncompleteArrayType(elementType, canon, ASM, elementTypeQuals); 1750 1751 IncompleteArrayTypes.InsertNode(newType, insertPos); 1752 Types.push_back(newType); 1753 return QualType(newType, 0); 1754} 1755 1756/// getVectorType - Return the unique reference to a vector type of 1757/// the specified element type and size. VectorType must be a built-in type. 1758QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts, 1759 VectorType::VectorKind VecKind) const { 1760 assert(vecType->isBuiltinType()); 1761 1762 // Check if we've already instantiated a vector of this type. 1763 llvm::FoldingSetNodeID ID; 1764 VectorType::Profile(ID, vecType, NumElts, Type::Vector, VecKind); 1765 1766 void *InsertPos = 0; 1767 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1768 return QualType(VTP, 0); 1769 1770 // If the element type isn't canonical, this won't be a canonical type either, 1771 // so fill in the canonical type field. 1772 QualType Canonical; 1773 if (!vecType.isCanonical()) { 1774 Canonical = getVectorType(getCanonicalType(vecType), NumElts, VecKind); 1775 1776 // Get the new insert position for the node we care about. 1777 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1778 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1779 } 1780 VectorType *New = new (*this, TypeAlignment) 1781 VectorType(vecType, NumElts, Canonical, VecKind); 1782 VectorTypes.InsertNode(New, InsertPos); 1783 Types.push_back(New); 1784 return QualType(New, 0); 1785} 1786 1787/// getExtVectorType - Return the unique reference to an extended vector type of 1788/// the specified element type and size. VectorType must be a built-in type. 1789QualType 1790ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) const { 1791 assert(vecType->isBuiltinType()); 1792 1793 // Check if we've already instantiated a vector of this type. 1794 llvm::FoldingSetNodeID ID; 1795 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector, 1796 VectorType::GenericVector); 1797 void *InsertPos = 0; 1798 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1799 return QualType(VTP, 0); 1800 1801 // If the element type isn't canonical, this won't be a canonical type either, 1802 // so fill in the canonical type field. 1803 QualType Canonical; 1804 if (!vecType.isCanonical()) { 1805 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts); 1806 1807 // Get the new insert position for the node we care about. 1808 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1809 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1810 } 1811 ExtVectorType *New = new (*this, TypeAlignment) 1812 ExtVectorType(vecType, NumElts, Canonical); 1813 VectorTypes.InsertNode(New, InsertPos); 1814 Types.push_back(New); 1815 return QualType(New, 0); 1816} 1817 1818QualType 1819ASTContext::getDependentSizedExtVectorType(QualType vecType, 1820 Expr *SizeExpr, 1821 SourceLocation AttrLoc) const { 1822 llvm::FoldingSetNodeID ID; 1823 DependentSizedExtVectorType::Profile(ID, *this, getCanonicalType(vecType), 1824 SizeExpr); 1825 1826 void *InsertPos = 0; 1827 DependentSizedExtVectorType *Canon 1828 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1829 DependentSizedExtVectorType *New; 1830 if (Canon) { 1831 // We already have a canonical version of this array type; use it as 1832 // the canonical type for a newly-built type. 1833 New = new (*this, TypeAlignment) 1834 DependentSizedExtVectorType(*this, vecType, QualType(Canon, 0), 1835 SizeExpr, AttrLoc); 1836 } else { 1837 QualType CanonVecTy = getCanonicalType(vecType); 1838 if (CanonVecTy == vecType) { 1839 New = new (*this, TypeAlignment) 1840 DependentSizedExtVectorType(*this, vecType, QualType(), SizeExpr, 1841 AttrLoc); 1842 1843 DependentSizedExtVectorType *CanonCheck 1844 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1845 assert(!CanonCheck && "Dependent-sized ext_vector canonical type broken"); 1846 (void)CanonCheck; 1847 DependentSizedExtVectorTypes.InsertNode(New, InsertPos); 1848 } else { 1849 QualType Canon = getDependentSizedExtVectorType(CanonVecTy, SizeExpr, 1850 SourceLocation()); 1851 New = new (*this, TypeAlignment) 1852 DependentSizedExtVectorType(*this, vecType, Canon, SizeExpr, AttrLoc); 1853 } 1854 } 1855 1856 Types.push_back(New); 1857 return QualType(New, 0); 1858} 1859 1860/// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 1861/// 1862QualType 1863ASTContext::getFunctionNoProtoType(QualType ResultTy, 1864 const FunctionType::ExtInfo &Info) const { 1865 const CallingConv DefaultCC = Info.getCC(); 1866 const CallingConv CallConv = (LangOpts.MRTD && DefaultCC == CC_Default) ? 1867 CC_X86StdCall : DefaultCC; 1868 // Unique functions, to guarantee there is only one function of a particular 1869 // structure. 1870 llvm::FoldingSetNodeID ID; 1871 FunctionNoProtoType::Profile(ID, ResultTy, Info); 1872 1873 void *InsertPos = 0; 1874 if (FunctionNoProtoType *FT = 1875 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1876 return QualType(FT, 0); 1877 1878 QualType Canonical; 1879 if (!ResultTy.isCanonical() || 1880 getCanonicalCallConv(CallConv) != CallConv) { 1881 Canonical = 1882 getFunctionNoProtoType(getCanonicalType(ResultTy), 1883 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1884 1885 // Get the new insert position for the node we care about. 1886 FunctionNoProtoType *NewIP = 1887 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1888 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1889 } 1890 1891 FunctionProtoType::ExtInfo newInfo = Info.withCallingConv(CallConv); 1892 FunctionNoProtoType *New = new (*this, TypeAlignment) 1893 FunctionNoProtoType(ResultTy, Canonical, newInfo); 1894 Types.push_back(New); 1895 FunctionNoProtoTypes.InsertNode(New, InsertPos); 1896 return QualType(New, 0); 1897} 1898 1899/// getFunctionType - Return a normal function type with a typed argument 1900/// list. isVariadic indicates whether the argument list includes '...'. 1901QualType 1902ASTContext::getFunctionType(QualType ResultTy, 1903 const QualType *ArgArray, unsigned NumArgs, 1904 const FunctionProtoType::ExtProtoInfo &EPI) const { 1905 // Unique functions, to guarantee there is only one function of a particular 1906 // structure. 1907 llvm::FoldingSetNodeID ID; 1908 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, EPI); 1909 1910 void *InsertPos = 0; 1911 if (FunctionProtoType *FTP = 1912 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1913 return QualType(FTP, 0); 1914 1915 // Determine whether the type being created is already canonical or not. 1916 bool isCanonical= EPI.ExceptionSpecType == EST_None && ResultTy.isCanonical(); 1917 for (unsigned i = 0; i != NumArgs && isCanonical; ++i) 1918 if (!ArgArray[i].isCanonicalAsParam()) 1919 isCanonical = false; 1920 1921 const CallingConv DefaultCC = EPI.ExtInfo.getCC(); 1922 const CallingConv CallConv = (LangOpts.MRTD && DefaultCC == CC_Default) ? 1923 CC_X86StdCall : DefaultCC; 1924 1925 // If this type isn't canonical, get the canonical version of it. 1926 // The exception spec is not part of the canonical type. 1927 QualType Canonical; 1928 if (!isCanonical || getCanonicalCallConv(CallConv) != CallConv) { 1929 llvm::SmallVector<QualType, 16> CanonicalArgs; 1930 CanonicalArgs.reserve(NumArgs); 1931 for (unsigned i = 0; i != NumArgs; ++i) 1932 CanonicalArgs.push_back(getCanonicalParamType(ArgArray[i])); 1933 1934 FunctionProtoType::ExtProtoInfo CanonicalEPI = EPI; 1935 CanonicalEPI.ExceptionSpecType = EST_None; 1936 CanonicalEPI.NumExceptions = 0; 1937 CanonicalEPI.ExtInfo 1938 = CanonicalEPI.ExtInfo.withCallingConv(getCanonicalCallConv(CallConv)); 1939 1940 Canonical = getFunctionType(getCanonicalType(ResultTy), 1941 CanonicalArgs.data(), NumArgs, 1942 CanonicalEPI); 1943 1944 // Get the new insert position for the node we care about. 1945 FunctionProtoType *NewIP = 1946 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1947 assert(NewIP == 0 && "Shouldn't be in the map!"); (void)NewIP; 1948 } 1949 1950 // FunctionProtoType objects are allocated with extra bytes after them 1951 // for two variable size arrays (for parameter and exception types) at the 1952 // end of them. 1953 size_t Size = sizeof(FunctionProtoType) + 1954 NumArgs * sizeof(QualType) + 1955 EPI.NumExceptions * sizeof(QualType); 1956 FunctionProtoType *FTP = (FunctionProtoType*) Allocate(Size, TypeAlignment); 1957 FunctionProtoType::ExtProtoInfo newEPI = EPI; 1958 newEPI.ExtInfo = EPI.ExtInfo.withCallingConv(CallConv); 1959 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, Canonical, newEPI); 1960 Types.push_back(FTP); 1961 FunctionProtoTypes.InsertNode(FTP, InsertPos); 1962 return QualType(FTP, 0); 1963} 1964 1965#ifndef NDEBUG 1966static bool NeedsInjectedClassNameType(const RecordDecl *D) { 1967 if (!isa<CXXRecordDecl>(D)) return false; 1968 const CXXRecordDecl *RD = cast<CXXRecordDecl>(D); 1969 if (isa<ClassTemplatePartialSpecializationDecl>(RD)) 1970 return true; 1971 if (RD->getDescribedClassTemplate() && 1972 !isa<ClassTemplateSpecializationDecl>(RD)) 1973 return true; 1974 return false; 1975} 1976#endif 1977 1978/// getInjectedClassNameType - Return the unique reference to the 1979/// injected class name type for the specified templated declaration. 1980QualType ASTContext::getInjectedClassNameType(CXXRecordDecl *Decl, 1981 QualType TST) const { 1982 assert(NeedsInjectedClassNameType(Decl)); 1983 if (Decl->TypeForDecl) { 1984 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1985 } else if (CXXRecordDecl *PrevDecl = Decl->getPreviousDeclaration()) { 1986 assert(PrevDecl->TypeForDecl && "previous declaration has no type"); 1987 Decl->TypeForDecl = PrevDecl->TypeForDecl; 1988 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1989 } else { 1990 Type *newType = 1991 new (*this, TypeAlignment) InjectedClassNameType(Decl, TST); 1992 Decl->TypeForDecl = newType; 1993 Types.push_back(newType); 1994 } 1995 return QualType(Decl->TypeForDecl, 0); 1996} 1997 1998/// getTypeDeclType - Return the unique reference to the type for the 1999/// specified type declaration. 2000QualType ASTContext::getTypeDeclTypeSlow(const TypeDecl *Decl) const { 2001 assert(Decl && "Passed null for Decl param"); 2002 assert(!Decl->TypeForDecl && "TypeForDecl present in slow case"); 2003 2004 if (const TypedefDecl *Typedef = dyn_cast<TypedefDecl>(Decl)) 2005 return getTypedefType(Typedef); 2006 2007 assert(!isa<TemplateTypeParmDecl>(Decl) && 2008 "Template type parameter types are always available."); 2009 2010 if (const RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) { 2011 assert(!Record->getPreviousDeclaration() && 2012 "struct/union has previous declaration"); 2013 assert(!NeedsInjectedClassNameType(Record)); 2014 return getRecordType(Record); 2015 } else if (const EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) { 2016 assert(!Enum->getPreviousDeclaration() && 2017 "enum has previous declaration"); 2018 return getEnumType(Enum); 2019 } else if (const UnresolvedUsingTypenameDecl *Using = 2020 dyn_cast<UnresolvedUsingTypenameDecl>(Decl)) { 2021 Type *newType = new (*this, TypeAlignment) UnresolvedUsingType(Using); 2022 Decl->TypeForDecl = newType; 2023 Types.push_back(newType); 2024 } else 2025 llvm_unreachable("TypeDecl without a type?"); 2026 2027 return QualType(Decl->TypeForDecl, 0); 2028} 2029 2030/// getTypedefType - Return the unique reference to the type for the 2031/// specified typename decl. 2032QualType 2033ASTContext::getTypedefType(const TypedefDecl *Decl, QualType Canonical) const { 2034 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2035 2036 if (Canonical.isNull()) 2037 Canonical = getCanonicalType(Decl->getUnderlyingType()); 2038 TypedefType *newType = new(*this, TypeAlignment) 2039 TypedefType(Type::Typedef, Decl, Canonical); 2040 Decl->TypeForDecl = newType; 2041 Types.push_back(newType); 2042 return QualType(newType, 0); 2043} 2044 2045QualType ASTContext::getRecordType(const RecordDecl *Decl) const { 2046 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2047 2048 if (const RecordDecl *PrevDecl = Decl->getPreviousDeclaration()) 2049 if (PrevDecl->TypeForDecl) 2050 return QualType(Decl->TypeForDecl = PrevDecl->TypeForDecl, 0); 2051 2052 RecordType *newType = new (*this, TypeAlignment) RecordType(Decl); 2053 Decl->TypeForDecl = newType; 2054 Types.push_back(newType); 2055 return QualType(newType, 0); 2056} 2057 2058QualType ASTContext::getEnumType(const EnumDecl *Decl) const { 2059 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 2060 2061 if (const EnumDecl *PrevDecl = Decl->getPreviousDeclaration()) 2062 if (PrevDecl->TypeForDecl) 2063 return QualType(Decl->TypeForDecl = PrevDecl->TypeForDecl, 0); 2064 2065 EnumType *newType = new (*this, TypeAlignment) EnumType(Decl); 2066 Decl->TypeForDecl = newType; 2067 Types.push_back(newType); 2068 return QualType(newType, 0); 2069} 2070 2071QualType ASTContext::getAttributedType(AttributedType::Kind attrKind, 2072 QualType modifiedType, 2073 QualType equivalentType) { 2074 llvm::FoldingSetNodeID id; 2075 AttributedType::Profile(id, attrKind, modifiedType, equivalentType); 2076 2077 void *insertPos = 0; 2078 AttributedType *type = AttributedTypes.FindNodeOrInsertPos(id, insertPos); 2079 if (type) return QualType(type, 0); 2080 2081 QualType canon = getCanonicalType(equivalentType); 2082 type = new (*this, TypeAlignment) 2083 AttributedType(canon, attrKind, modifiedType, equivalentType); 2084 2085 Types.push_back(type); 2086 AttributedTypes.InsertNode(type, insertPos); 2087 2088 return QualType(type, 0); 2089} 2090 2091 2092/// \brief Retrieve a substitution-result type. 2093QualType 2094ASTContext::getSubstTemplateTypeParmType(const TemplateTypeParmType *Parm, 2095 QualType Replacement) const { 2096 assert(Replacement.isCanonical() 2097 && "replacement types must always be canonical"); 2098 2099 llvm::FoldingSetNodeID ID; 2100 SubstTemplateTypeParmType::Profile(ID, Parm, Replacement); 2101 void *InsertPos = 0; 2102 SubstTemplateTypeParmType *SubstParm 2103 = SubstTemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2104 2105 if (!SubstParm) { 2106 SubstParm = new (*this, TypeAlignment) 2107 SubstTemplateTypeParmType(Parm, Replacement); 2108 Types.push_back(SubstParm); 2109 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 2110 } 2111 2112 return QualType(SubstParm, 0); 2113} 2114 2115/// \brief Retrieve a 2116QualType ASTContext::getSubstTemplateTypeParmPackType( 2117 const TemplateTypeParmType *Parm, 2118 const TemplateArgument &ArgPack) { 2119#ifndef NDEBUG 2120 for (TemplateArgument::pack_iterator P = ArgPack.pack_begin(), 2121 PEnd = ArgPack.pack_end(); 2122 P != PEnd; ++P) { 2123 assert(P->getKind() == TemplateArgument::Type &&"Pack contains a non-type"); 2124 assert(P->getAsType().isCanonical() && "Pack contains non-canonical type"); 2125 } 2126#endif 2127 2128 llvm::FoldingSetNodeID ID; 2129 SubstTemplateTypeParmPackType::Profile(ID, Parm, ArgPack); 2130 void *InsertPos = 0; 2131 if (SubstTemplateTypeParmPackType *SubstParm 2132 = SubstTemplateTypeParmPackTypes.FindNodeOrInsertPos(ID, InsertPos)) 2133 return QualType(SubstParm, 0); 2134 2135 QualType Canon; 2136 if (!Parm->isCanonicalUnqualified()) { 2137 Canon = getCanonicalType(QualType(Parm, 0)); 2138 Canon = getSubstTemplateTypeParmPackType(cast<TemplateTypeParmType>(Canon), 2139 ArgPack); 2140 SubstTemplateTypeParmPackTypes.FindNodeOrInsertPos(ID, InsertPos); 2141 } 2142 2143 SubstTemplateTypeParmPackType *SubstParm 2144 = new (*this, TypeAlignment) SubstTemplateTypeParmPackType(Parm, Canon, 2145 ArgPack); 2146 Types.push_back(SubstParm); 2147 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 2148 return QualType(SubstParm, 0); 2149} 2150 2151/// \brief Retrieve the template type parameter type for a template 2152/// parameter or parameter pack with the given depth, index, and (optionally) 2153/// name. 2154QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index, 2155 bool ParameterPack, 2156 IdentifierInfo *Name) const { 2157 llvm::FoldingSetNodeID ID; 2158 TemplateTypeParmType::Profile(ID, Depth, Index, ParameterPack, Name); 2159 void *InsertPos = 0; 2160 TemplateTypeParmType *TypeParm 2161 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2162 2163 if (TypeParm) 2164 return QualType(TypeParm, 0); 2165 2166 if (Name) { 2167 QualType Canon = getTemplateTypeParmType(Depth, Index, ParameterPack); 2168 TypeParm = new (*this, TypeAlignment) 2169 TemplateTypeParmType(Depth, Index, ParameterPack, Name, Canon); 2170 2171 TemplateTypeParmType *TypeCheck 2172 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 2173 assert(!TypeCheck && "Template type parameter canonical type broken"); 2174 (void)TypeCheck; 2175 } else 2176 TypeParm = new (*this, TypeAlignment) 2177 TemplateTypeParmType(Depth, Index, ParameterPack); 2178 2179 Types.push_back(TypeParm); 2180 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos); 2181 2182 return QualType(TypeParm, 0); 2183} 2184 2185TypeSourceInfo * 2186ASTContext::getTemplateSpecializationTypeInfo(TemplateName Name, 2187 SourceLocation NameLoc, 2188 const TemplateArgumentListInfo &Args, 2189 QualType CanonType) const { 2190 assert(!Name.getAsDependentTemplateName() && 2191 "No dependent template names here!"); 2192 QualType TST = getTemplateSpecializationType(Name, Args, CanonType); 2193 2194 TypeSourceInfo *DI = CreateTypeSourceInfo(TST); 2195 TemplateSpecializationTypeLoc TL 2196 = cast<TemplateSpecializationTypeLoc>(DI->getTypeLoc()); 2197 TL.setTemplateNameLoc(NameLoc); 2198 TL.setLAngleLoc(Args.getLAngleLoc()); 2199 TL.setRAngleLoc(Args.getRAngleLoc()); 2200 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 2201 TL.setArgLocInfo(i, Args[i].getLocInfo()); 2202 return DI; 2203} 2204 2205QualType 2206ASTContext::getTemplateSpecializationType(TemplateName Template, 2207 const TemplateArgumentListInfo &Args, 2208 QualType Canon) const { 2209 assert(!Template.getAsDependentTemplateName() && 2210 "No dependent template names here!"); 2211 2212 unsigned NumArgs = Args.size(); 2213 2214 llvm::SmallVector<TemplateArgument, 4> ArgVec; 2215 ArgVec.reserve(NumArgs); 2216 for (unsigned i = 0; i != NumArgs; ++i) 2217 ArgVec.push_back(Args[i].getArgument()); 2218 2219 return getTemplateSpecializationType(Template, ArgVec.data(), NumArgs, 2220 Canon); 2221} 2222 2223QualType 2224ASTContext::getTemplateSpecializationType(TemplateName Template, 2225 const TemplateArgument *Args, 2226 unsigned NumArgs, 2227 QualType Canon) const { 2228 assert(!Template.getAsDependentTemplateName() && 2229 "No dependent template names here!"); 2230 // Look through qualified template names. 2231 if (QualifiedTemplateName *QTN = Template.getAsQualifiedTemplateName()) 2232 Template = TemplateName(QTN->getTemplateDecl()); 2233 2234 if (!Canon.isNull()) 2235 Canon = getCanonicalType(Canon); 2236 else 2237 Canon = getCanonicalTemplateSpecializationType(Template, Args, NumArgs); 2238 2239 // Allocate the (non-canonical) template specialization type, but don't 2240 // try to unique it: these types typically have location information that 2241 // we don't unique and don't want to lose. 2242 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 2243 sizeof(TemplateArgument) * NumArgs), 2244 TypeAlignment); 2245 TemplateSpecializationType *Spec 2246 = new (Mem) TemplateSpecializationType(Template, 2247 Args, NumArgs, 2248 Canon); 2249 2250 Types.push_back(Spec); 2251 return QualType(Spec, 0); 2252} 2253 2254QualType 2255ASTContext::getCanonicalTemplateSpecializationType(TemplateName Template, 2256 const TemplateArgument *Args, 2257 unsigned NumArgs) const { 2258 assert(!Template.getAsDependentTemplateName() && 2259 "No dependent template names here!"); 2260 // Look through qualified template names. 2261 if (QualifiedTemplateName *QTN = Template.getAsQualifiedTemplateName()) 2262 Template = TemplateName(QTN->getTemplateDecl()); 2263 2264 // Build the canonical template specialization type. 2265 TemplateName CanonTemplate = getCanonicalTemplateName(Template); 2266 llvm::SmallVector<TemplateArgument, 4> CanonArgs; 2267 CanonArgs.reserve(NumArgs); 2268 for (unsigned I = 0; I != NumArgs; ++I) 2269 CanonArgs.push_back(getCanonicalTemplateArgument(Args[I])); 2270 2271 // Determine whether this canonical template specialization type already 2272 // exists. 2273 llvm::FoldingSetNodeID ID; 2274 TemplateSpecializationType::Profile(ID, CanonTemplate, 2275 CanonArgs.data(), NumArgs, *this); 2276 2277 void *InsertPos = 0; 2278 TemplateSpecializationType *Spec 2279 = TemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2280 2281 if (!Spec) { 2282 // Allocate a new canonical template specialization type. 2283 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 2284 sizeof(TemplateArgument) * NumArgs), 2285 TypeAlignment); 2286 Spec = new (Mem) TemplateSpecializationType(CanonTemplate, 2287 CanonArgs.data(), NumArgs, 2288 QualType()); 2289 Types.push_back(Spec); 2290 TemplateSpecializationTypes.InsertNode(Spec, InsertPos); 2291 } 2292 2293 assert(Spec->isDependentType() && 2294 "Non-dependent template-id type must have a canonical type"); 2295 return QualType(Spec, 0); 2296} 2297 2298QualType 2299ASTContext::getElaboratedType(ElaboratedTypeKeyword Keyword, 2300 NestedNameSpecifier *NNS, 2301 QualType NamedType) const { 2302 llvm::FoldingSetNodeID ID; 2303 ElaboratedType::Profile(ID, Keyword, NNS, NamedType); 2304 2305 void *InsertPos = 0; 2306 ElaboratedType *T = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2307 if (T) 2308 return QualType(T, 0); 2309 2310 QualType Canon = NamedType; 2311 if (!Canon.isCanonical()) { 2312 Canon = getCanonicalType(NamedType); 2313 ElaboratedType *CheckT = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2314 assert(!CheckT && "Elaborated canonical type broken"); 2315 (void)CheckT; 2316 } 2317 2318 T = new (*this) ElaboratedType(Keyword, NNS, NamedType, Canon); 2319 Types.push_back(T); 2320 ElaboratedTypes.InsertNode(T, InsertPos); 2321 return QualType(T, 0); 2322} 2323 2324QualType 2325ASTContext::getParenType(QualType InnerType) const { 2326 llvm::FoldingSetNodeID ID; 2327 ParenType::Profile(ID, InnerType); 2328 2329 void *InsertPos = 0; 2330 ParenType *T = ParenTypes.FindNodeOrInsertPos(ID, InsertPos); 2331 if (T) 2332 return QualType(T, 0); 2333 2334 QualType Canon = InnerType; 2335 if (!Canon.isCanonical()) { 2336 Canon = getCanonicalType(InnerType); 2337 ParenType *CheckT = ParenTypes.FindNodeOrInsertPos(ID, InsertPos); 2338 assert(!CheckT && "Paren canonical type broken"); 2339 (void)CheckT; 2340 } 2341 2342 T = new (*this) ParenType(InnerType, Canon); 2343 Types.push_back(T); 2344 ParenTypes.InsertNode(T, InsertPos); 2345 return QualType(T, 0); 2346} 2347 2348QualType ASTContext::getDependentNameType(ElaboratedTypeKeyword Keyword, 2349 NestedNameSpecifier *NNS, 2350 const IdentifierInfo *Name, 2351 QualType Canon) const { 2352 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 2353 2354 if (Canon.isNull()) { 2355 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2356 ElaboratedTypeKeyword CanonKeyword = Keyword; 2357 if (Keyword == ETK_None) 2358 CanonKeyword = ETK_Typename; 2359 2360 if (CanonNNS != NNS || CanonKeyword != Keyword) 2361 Canon = getDependentNameType(CanonKeyword, CanonNNS, Name); 2362 } 2363 2364 llvm::FoldingSetNodeID ID; 2365 DependentNameType::Profile(ID, Keyword, NNS, Name); 2366 2367 void *InsertPos = 0; 2368 DependentNameType *T 2369 = DependentNameTypes.FindNodeOrInsertPos(ID, InsertPos); 2370 if (T) 2371 return QualType(T, 0); 2372 2373 T = new (*this) DependentNameType(Keyword, NNS, Name, Canon); 2374 Types.push_back(T); 2375 DependentNameTypes.InsertNode(T, InsertPos); 2376 return QualType(T, 0); 2377} 2378 2379QualType 2380ASTContext::getDependentTemplateSpecializationType( 2381 ElaboratedTypeKeyword Keyword, 2382 NestedNameSpecifier *NNS, 2383 const IdentifierInfo *Name, 2384 const TemplateArgumentListInfo &Args) const { 2385 // TODO: avoid this copy 2386 llvm::SmallVector<TemplateArgument, 16> ArgCopy; 2387 for (unsigned I = 0, E = Args.size(); I != E; ++I) 2388 ArgCopy.push_back(Args[I].getArgument()); 2389 return getDependentTemplateSpecializationType(Keyword, NNS, Name, 2390 ArgCopy.size(), 2391 ArgCopy.data()); 2392} 2393 2394QualType 2395ASTContext::getDependentTemplateSpecializationType( 2396 ElaboratedTypeKeyword Keyword, 2397 NestedNameSpecifier *NNS, 2398 const IdentifierInfo *Name, 2399 unsigned NumArgs, 2400 const TemplateArgument *Args) const { 2401 assert((!NNS || NNS->isDependent()) && 2402 "nested-name-specifier must be dependent"); 2403 2404 llvm::FoldingSetNodeID ID; 2405 DependentTemplateSpecializationType::Profile(ID, *this, Keyword, NNS, 2406 Name, NumArgs, Args); 2407 2408 void *InsertPos = 0; 2409 DependentTemplateSpecializationType *T 2410 = DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2411 if (T) 2412 return QualType(T, 0); 2413 2414 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2415 2416 ElaboratedTypeKeyword CanonKeyword = Keyword; 2417 if (Keyword == ETK_None) CanonKeyword = ETK_Typename; 2418 2419 bool AnyNonCanonArgs = false; 2420 llvm::SmallVector<TemplateArgument, 16> CanonArgs(NumArgs); 2421 for (unsigned I = 0; I != NumArgs; ++I) { 2422 CanonArgs[I] = getCanonicalTemplateArgument(Args[I]); 2423 if (!CanonArgs[I].structurallyEquals(Args[I])) 2424 AnyNonCanonArgs = true; 2425 } 2426 2427 QualType Canon; 2428 if (AnyNonCanonArgs || CanonNNS != NNS || CanonKeyword != Keyword) { 2429 Canon = getDependentTemplateSpecializationType(CanonKeyword, CanonNNS, 2430 Name, NumArgs, 2431 CanonArgs.data()); 2432 2433 // Find the insert position again. 2434 DependentTemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 2435 } 2436 2437 void *Mem = Allocate((sizeof(DependentTemplateSpecializationType) + 2438 sizeof(TemplateArgument) * NumArgs), 2439 TypeAlignment); 2440 T = new (Mem) DependentTemplateSpecializationType(Keyword, NNS, 2441 Name, NumArgs, Args, Canon); 2442 Types.push_back(T); 2443 DependentTemplateSpecializationTypes.InsertNode(T, InsertPos); 2444 return QualType(T, 0); 2445} 2446 2447QualType ASTContext::getPackExpansionType(QualType Pattern, 2448 llvm::Optional<unsigned> NumExpansions) { 2449 llvm::FoldingSetNodeID ID; 2450 PackExpansionType::Profile(ID, Pattern, NumExpansions); 2451 2452 assert(Pattern->containsUnexpandedParameterPack() && 2453 "Pack expansions must expand one or more parameter packs"); 2454 void *InsertPos = 0; 2455 PackExpansionType *T 2456 = PackExpansionTypes.FindNodeOrInsertPos(ID, InsertPos); 2457 if (T) 2458 return QualType(T, 0); 2459 2460 QualType Canon; 2461 if (!Pattern.isCanonical()) { 2462 Canon = getPackExpansionType(getCanonicalType(Pattern), NumExpansions); 2463 2464 // Find the insert position again. 2465 PackExpansionTypes.FindNodeOrInsertPos(ID, InsertPos); 2466 } 2467 2468 T = new (*this) PackExpansionType(Pattern, Canon, NumExpansions); 2469 Types.push_back(T); 2470 PackExpansionTypes.InsertNode(T, InsertPos); 2471 return QualType(T, 0); 2472} 2473 2474/// CmpProtocolNames - Comparison predicate for sorting protocols 2475/// alphabetically. 2476static bool CmpProtocolNames(const ObjCProtocolDecl *LHS, 2477 const ObjCProtocolDecl *RHS) { 2478 return LHS->getDeclName() < RHS->getDeclName(); 2479} 2480 2481static bool areSortedAndUniqued(ObjCProtocolDecl * const *Protocols, 2482 unsigned NumProtocols) { 2483 if (NumProtocols == 0) return true; 2484 2485 for (unsigned i = 1; i != NumProtocols; ++i) 2486 if (!CmpProtocolNames(Protocols[i-1], Protocols[i])) 2487 return false; 2488 return true; 2489} 2490 2491static void SortAndUniqueProtocols(ObjCProtocolDecl **Protocols, 2492 unsigned &NumProtocols) { 2493 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols; 2494 2495 // Sort protocols, keyed by name. 2496 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames); 2497 2498 // Remove duplicates. 2499 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd); 2500 NumProtocols = ProtocolsEnd-Protocols; 2501} 2502 2503QualType ASTContext::getObjCObjectType(QualType BaseType, 2504 ObjCProtocolDecl * const *Protocols, 2505 unsigned NumProtocols) const { 2506 // If the base type is an interface and there aren't any protocols 2507 // to add, then the interface type will do just fine. 2508 if (!NumProtocols && isa<ObjCInterfaceType>(BaseType)) 2509 return BaseType; 2510 2511 // Look in the folding set for an existing type. 2512 llvm::FoldingSetNodeID ID; 2513 ObjCObjectTypeImpl::Profile(ID, BaseType, Protocols, NumProtocols); 2514 void *InsertPos = 0; 2515 if (ObjCObjectType *QT = ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos)) 2516 return QualType(QT, 0); 2517 2518 // Build the canonical type, which has the canonical base type and 2519 // a sorted-and-uniqued list of protocols. 2520 QualType Canonical; 2521 bool ProtocolsSorted = areSortedAndUniqued(Protocols, NumProtocols); 2522 if (!ProtocolsSorted || !BaseType.isCanonical()) { 2523 if (!ProtocolsSorted) { 2524 llvm::SmallVector<ObjCProtocolDecl*, 8> Sorted(Protocols, 2525 Protocols + NumProtocols); 2526 unsigned UniqueCount = NumProtocols; 2527 2528 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2529 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2530 &Sorted[0], UniqueCount); 2531 } else { 2532 Canonical = getObjCObjectType(getCanonicalType(BaseType), 2533 Protocols, NumProtocols); 2534 } 2535 2536 // Regenerate InsertPos. 2537 ObjCObjectTypes.FindNodeOrInsertPos(ID, InsertPos); 2538 } 2539 2540 unsigned Size = sizeof(ObjCObjectTypeImpl); 2541 Size += NumProtocols * sizeof(ObjCProtocolDecl *); 2542 void *Mem = Allocate(Size, TypeAlignment); 2543 ObjCObjectTypeImpl *T = 2544 new (Mem) ObjCObjectTypeImpl(Canonical, BaseType, Protocols, NumProtocols); 2545 2546 Types.push_back(T); 2547 ObjCObjectTypes.InsertNode(T, InsertPos); 2548 return QualType(T, 0); 2549} 2550 2551/// getObjCObjectPointerType - Return a ObjCObjectPointerType type for 2552/// the given object type. 2553QualType ASTContext::getObjCObjectPointerType(QualType ObjectT) const { 2554 llvm::FoldingSetNodeID ID; 2555 ObjCObjectPointerType::Profile(ID, ObjectT); 2556 2557 void *InsertPos = 0; 2558 if (ObjCObjectPointerType *QT = 2559 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 2560 return QualType(QT, 0); 2561 2562 // Find the canonical object type. 2563 QualType Canonical; 2564 if (!ObjectT.isCanonical()) { 2565 Canonical = getObjCObjectPointerType(getCanonicalType(ObjectT)); 2566 2567 // Regenerate InsertPos. 2568 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 2569 } 2570 2571 // No match. 2572 void *Mem = Allocate(sizeof(ObjCObjectPointerType), TypeAlignment); 2573 ObjCObjectPointerType *QType = 2574 new (Mem) ObjCObjectPointerType(Canonical, ObjectT); 2575 2576 Types.push_back(QType); 2577 ObjCObjectPointerTypes.InsertNode(QType, InsertPos); 2578 return QualType(QType, 0); 2579} 2580 2581/// getObjCInterfaceType - Return the unique reference to the type for the 2582/// specified ObjC interface decl. The list of protocols is optional. 2583QualType ASTContext::getObjCInterfaceType(const ObjCInterfaceDecl *Decl) const { 2584 if (Decl->TypeForDecl) 2585 return QualType(Decl->TypeForDecl, 0); 2586 2587 // FIXME: redeclarations? 2588 void *Mem = Allocate(sizeof(ObjCInterfaceType), TypeAlignment); 2589 ObjCInterfaceType *T = new (Mem) ObjCInterfaceType(Decl); 2590 Decl->TypeForDecl = T; 2591 Types.push_back(T); 2592 return QualType(T, 0); 2593} 2594 2595/// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique 2596/// TypeOfExprType AST's (since expression's are never shared). For example, 2597/// multiple declarations that refer to "typeof(x)" all contain different 2598/// DeclRefExpr's. This doesn't effect the type checker, since it operates 2599/// on canonical type's (which are always unique). 2600QualType ASTContext::getTypeOfExprType(Expr *tofExpr) const { 2601 TypeOfExprType *toe; 2602 if (tofExpr->isTypeDependent()) { 2603 llvm::FoldingSetNodeID ID; 2604 DependentTypeOfExprType::Profile(ID, *this, tofExpr); 2605 2606 void *InsertPos = 0; 2607 DependentTypeOfExprType *Canon 2608 = DependentTypeOfExprTypes.FindNodeOrInsertPos(ID, InsertPos); 2609 if (Canon) { 2610 // We already have a "canonical" version of an identical, dependent 2611 // typeof(expr) type. Use that as our canonical type. 2612 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, 2613 QualType((TypeOfExprType*)Canon, 0)); 2614 } 2615 else { 2616 // Build a new, canonical typeof(expr) type. 2617 Canon 2618 = new (*this, TypeAlignment) DependentTypeOfExprType(*this, tofExpr); 2619 DependentTypeOfExprTypes.InsertNode(Canon, InsertPos); 2620 toe = Canon; 2621 } 2622 } else { 2623 QualType Canonical = getCanonicalType(tofExpr->getType()); 2624 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, Canonical); 2625 } 2626 Types.push_back(toe); 2627 return QualType(toe, 0); 2628} 2629 2630/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique 2631/// TypeOfType AST's. The only motivation to unique these nodes would be 2632/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be 2633/// an issue. This doesn't effect the type checker, since it operates 2634/// on canonical type's (which are always unique). 2635QualType ASTContext::getTypeOfType(QualType tofType) const { 2636 QualType Canonical = getCanonicalType(tofType); 2637 TypeOfType *tot = new (*this, TypeAlignment) TypeOfType(tofType, Canonical); 2638 Types.push_back(tot); 2639 return QualType(tot, 0); 2640} 2641 2642/// getDecltypeForExpr - Given an expr, will return the decltype for that 2643/// expression, according to the rules in C++0x [dcl.type.simple]p4 2644static QualType getDecltypeForExpr(const Expr *e, const ASTContext &Context) { 2645 if (e->isTypeDependent()) 2646 return Context.DependentTy; 2647 2648 // If e is an id expression or a class member access, decltype(e) is defined 2649 // as the type of the entity named by e. 2650 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(e)) { 2651 if (const ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl())) 2652 return VD->getType(); 2653 } 2654 if (const MemberExpr *ME = dyn_cast<MemberExpr>(e)) { 2655 if (const FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) 2656 return FD->getType(); 2657 } 2658 // If e is a function call or an invocation of an overloaded operator, 2659 // (parentheses around e are ignored), decltype(e) is defined as the 2660 // return type of that function. 2661 if (const CallExpr *CE = dyn_cast<CallExpr>(e->IgnoreParens())) 2662 return CE->getCallReturnType(); 2663 2664 QualType T = e->getType(); 2665 2666 // Otherwise, where T is the type of e, if e is an lvalue, decltype(e) is 2667 // defined as T&, otherwise decltype(e) is defined as T. 2668 if (e->isLValue()) 2669 T = Context.getLValueReferenceType(T); 2670 2671 return T; 2672} 2673 2674/// getDecltypeType - Unlike many "get<Type>" functions, we don't unique 2675/// DecltypeType AST's. The only motivation to unique these nodes would be 2676/// memory savings. Since decltype(t) is fairly uncommon, space shouldn't be 2677/// an issue. This doesn't effect the type checker, since it operates 2678/// on canonical type's (which are always unique). 2679QualType ASTContext::getDecltypeType(Expr *e) const { 2680 DecltypeType *dt; 2681 if (e->isTypeDependent()) { 2682 llvm::FoldingSetNodeID ID; 2683 DependentDecltypeType::Profile(ID, *this, e); 2684 2685 void *InsertPos = 0; 2686 DependentDecltypeType *Canon 2687 = DependentDecltypeTypes.FindNodeOrInsertPos(ID, InsertPos); 2688 if (Canon) { 2689 // We already have a "canonical" version of an equivalent, dependent 2690 // decltype type. Use that as our canonical type. 2691 dt = new (*this, TypeAlignment) DecltypeType(e, DependentTy, 2692 QualType((DecltypeType*)Canon, 0)); 2693 } 2694 else { 2695 // Build a new, canonical typeof(expr) type. 2696 Canon = new (*this, TypeAlignment) DependentDecltypeType(*this, e); 2697 DependentDecltypeTypes.InsertNode(Canon, InsertPos); 2698 dt = Canon; 2699 } 2700 } else { 2701 QualType T = getDecltypeForExpr(e, *this); 2702 dt = new (*this, TypeAlignment) DecltypeType(e, T, getCanonicalType(T)); 2703 } 2704 Types.push_back(dt); 2705 return QualType(dt, 0); 2706} 2707 2708/// getAutoType - We only unique auto types after they've been deduced. 2709QualType ASTContext::getAutoType(QualType DeducedType) const { 2710 void *InsertPos = 0; 2711 if (!DeducedType.isNull()) { 2712 // Look in the folding set for an existing type. 2713 llvm::FoldingSetNodeID ID; 2714 AutoType::Profile(ID, DeducedType); 2715 if (AutoType *AT = AutoTypes.FindNodeOrInsertPos(ID, InsertPos)) 2716 return QualType(AT, 0); 2717 } 2718 2719 AutoType *AT = new (*this, TypeAlignment) AutoType(DeducedType); 2720 Types.push_back(AT); 2721 if (InsertPos) 2722 AutoTypes.InsertNode(AT, InsertPos); 2723 return QualType(AT, 0); 2724} 2725 2726/// getTagDeclType - Return the unique reference to the type for the 2727/// specified TagDecl (struct/union/class/enum) decl. 2728QualType ASTContext::getTagDeclType(const TagDecl *Decl) const { 2729 assert (Decl); 2730 // FIXME: What is the design on getTagDeclType when it requires casting 2731 // away const? mutable? 2732 return getTypeDeclType(const_cast<TagDecl*>(Decl)); 2733} 2734 2735/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result 2736/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and 2737/// needs to agree with the definition in <stddef.h>. 2738CanQualType ASTContext::getSizeType() const { 2739 return getFromTargetType(Target.getSizeType()); 2740} 2741 2742/// getSignedWCharType - Return the type of "signed wchar_t". 2743/// Used when in C++, as a GCC extension. 2744QualType ASTContext::getSignedWCharType() const { 2745 // FIXME: derive from "Target" ? 2746 return WCharTy; 2747} 2748 2749/// getUnsignedWCharType - Return the type of "unsigned wchar_t". 2750/// Used when in C++, as a GCC extension. 2751QualType ASTContext::getUnsignedWCharType() const { 2752 // FIXME: derive from "Target" ? 2753 return UnsignedIntTy; 2754} 2755 2756/// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 2757/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 2758QualType ASTContext::getPointerDiffType() const { 2759 return getFromTargetType(Target.getPtrDiffType(0)); 2760} 2761 2762//===----------------------------------------------------------------------===// 2763// Type Operators 2764//===----------------------------------------------------------------------===// 2765 2766CanQualType ASTContext::getCanonicalParamType(QualType T) const { 2767 // Push qualifiers into arrays, and then discard any remaining 2768 // qualifiers. 2769 T = getCanonicalType(T); 2770 T = getVariableArrayDecayedType(T); 2771 const Type *Ty = T.getTypePtr(); 2772 QualType Result; 2773 if (isa<ArrayType>(Ty)) { 2774 Result = getArrayDecayedType(QualType(Ty,0)); 2775 } else if (isa<FunctionType>(Ty)) { 2776 Result = getPointerType(QualType(Ty, 0)); 2777 } else { 2778 Result = QualType(Ty, 0); 2779 } 2780 2781 return CanQualType::CreateUnsafe(Result); 2782} 2783 2784 2785QualType ASTContext::getUnqualifiedArrayType(QualType type, 2786 Qualifiers &quals) { 2787 SplitQualType splitType = type.getSplitUnqualifiedType(); 2788 2789 // FIXME: getSplitUnqualifiedType() actually walks all the way to 2790 // the unqualified desugared type and then drops it on the floor. 2791 // We then have to strip that sugar back off with 2792 // getUnqualifiedDesugaredType(), which is silly. 2793 const ArrayType *AT = 2794 dyn_cast<ArrayType>(splitType.first->getUnqualifiedDesugaredType()); 2795 2796 // If we don't have an array, just use the results in splitType. 2797 if (!AT) { 2798 quals = splitType.second; 2799 return QualType(splitType.first, 0); 2800 } 2801 2802 // Otherwise, recurse on the array's element type. 2803 QualType elementType = AT->getElementType(); 2804 QualType unqualElementType = getUnqualifiedArrayType(elementType, quals); 2805 2806 // If that didn't change the element type, AT has no qualifiers, so we 2807 // can just use the results in splitType. 2808 if (elementType == unqualElementType) { 2809 assert(quals.empty()); // from the recursive call 2810 quals = splitType.second; 2811 return QualType(splitType.first, 0); 2812 } 2813 2814 // Otherwise, add in the qualifiers from the outermost type, then 2815 // build the type back up. 2816 quals.addConsistentQualifiers(splitType.second); 2817 2818 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) { 2819 return getConstantArrayType(unqualElementType, CAT->getSize(), 2820 CAT->getSizeModifier(), 0); 2821 } 2822 2823 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) { 2824 return getIncompleteArrayType(unqualElementType, IAT->getSizeModifier(), 0); 2825 } 2826 2827 if (const VariableArrayType *VAT = dyn_cast<VariableArrayType>(AT)) { 2828 return getVariableArrayType(unqualElementType, 2829 VAT->getSizeExpr(), 2830 VAT->getSizeModifier(), 2831 VAT->getIndexTypeCVRQualifiers(), 2832 VAT->getBracketsRange()); 2833 } 2834 2835 const DependentSizedArrayType *DSAT = cast<DependentSizedArrayType>(AT); 2836 return getDependentSizedArrayType(unqualElementType, DSAT->getSizeExpr(), 2837 DSAT->getSizeModifier(), 0, 2838 SourceRange()); 2839} 2840 2841/// UnwrapSimilarPointerTypes - If T1 and T2 are pointer types that 2842/// may be similar (C++ 4.4), replaces T1 and T2 with the type that 2843/// they point to and return true. If T1 and T2 aren't pointer types 2844/// or pointer-to-member types, or if they are not similar at this 2845/// level, returns false and leaves T1 and T2 unchanged. Top-level 2846/// qualifiers on T1 and T2 are ignored. This function will typically 2847/// be called in a loop that successively "unwraps" pointer and 2848/// pointer-to-member types to compare them at each level. 2849bool ASTContext::UnwrapSimilarPointerTypes(QualType &T1, QualType &T2) { 2850 const PointerType *T1PtrType = T1->getAs<PointerType>(), 2851 *T2PtrType = T2->getAs<PointerType>(); 2852 if (T1PtrType && T2PtrType) { 2853 T1 = T1PtrType->getPointeeType(); 2854 T2 = T2PtrType->getPointeeType(); 2855 return true; 2856 } 2857 2858 const MemberPointerType *T1MPType = T1->getAs<MemberPointerType>(), 2859 *T2MPType = T2->getAs<MemberPointerType>(); 2860 if (T1MPType && T2MPType && 2861 hasSameUnqualifiedType(QualType(T1MPType->getClass(), 0), 2862 QualType(T2MPType->getClass(), 0))) { 2863 T1 = T1MPType->getPointeeType(); 2864 T2 = T2MPType->getPointeeType(); 2865 return true; 2866 } 2867 2868 if (getLangOptions().ObjC1) { 2869 const ObjCObjectPointerType *T1OPType = T1->getAs<ObjCObjectPointerType>(), 2870 *T2OPType = T2->getAs<ObjCObjectPointerType>(); 2871 if (T1OPType && T2OPType) { 2872 T1 = T1OPType->getPointeeType(); 2873 T2 = T2OPType->getPointeeType(); 2874 return true; 2875 } 2876 } 2877 2878 // FIXME: Block pointers, too? 2879 2880 return false; 2881} 2882 2883DeclarationNameInfo 2884ASTContext::getNameForTemplate(TemplateName Name, 2885 SourceLocation NameLoc) const { 2886 if (TemplateDecl *TD = Name.getAsTemplateDecl()) 2887 // DNInfo work in progress: CHECKME: what about DNLoc? 2888 return DeclarationNameInfo(TD->getDeclName(), NameLoc); 2889 2890 if (DependentTemplateName *DTN = Name.getAsDependentTemplateName()) { 2891 DeclarationName DName; 2892 if (DTN->isIdentifier()) { 2893 DName = DeclarationNames.getIdentifier(DTN->getIdentifier()); 2894 return DeclarationNameInfo(DName, NameLoc); 2895 } else { 2896 DName = DeclarationNames.getCXXOperatorName(DTN->getOperator()); 2897 // DNInfo work in progress: FIXME: source locations? 2898 DeclarationNameLoc DNLoc; 2899 DNLoc.CXXOperatorName.BeginOpNameLoc = SourceLocation().getRawEncoding(); 2900 DNLoc.CXXOperatorName.EndOpNameLoc = SourceLocation().getRawEncoding(); 2901 return DeclarationNameInfo(DName, NameLoc, DNLoc); 2902 } 2903 } 2904 2905 OverloadedTemplateStorage *Storage = Name.getAsOverloadedTemplate(); 2906 assert(Storage); 2907 // DNInfo work in progress: CHECKME: what about DNLoc? 2908 return DeclarationNameInfo((*Storage->begin())->getDeclName(), NameLoc); 2909} 2910 2911TemplateName ASTContext::getCanonicalTemplateName(TemplateName Name) const { 2912 if (TemplateDecl *Template = Name.getAsTemplateDecl()) { 2913 if (TemplateTemplateParmDecl *TTP 2914 = dyn_cast<TemplateTemplateParmDecl>(Template)) 2915 Template = getCanonicalTemplateTemplateParmDecl(TTP); 2916 2917 // The canonical template name is the canonical template declaration. 2918 return TemplateName(cast<TemplateDecl>(Template->getCanonicalDecl())); 2919 } 2920 2921 if (SubstTemplateTemplateParmPackStorage *SubstPack 2922 = Name.getAsSubstTemplateTemplateParmPack()) { 2923 TemplateTemplateParmDecl *CanonParam 2924 = getCanonicalTemplateTemplateParmDecl(SubstPack->getParameterPack()); 2925 TemplateArgument CanonArgPack 2926 = getCanonicalTemplateArgument(SubstPack->getArgumentPack()); 2927 return getSubstTemplateTemplateParmPack(CanonParam, CanonArgPack); 2928 } 2929 2930 assert(!Name.getAsOverloadedTemplate()); 2931 2932 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 2933 assert(DTN && "Non-dependent template names must refer to template decls."); 2934 return DTN->CanonicalTemplateName; 2935} 2936 2937bool ASTContext::hasSameTemplateName(TemplateName X, TemplateName Y) { 2938 X = getCanonicalTemplateName(X); 2939 Y = getCanonicalTemplateName(Y); 2940 return X.getAsVoidPointer() == Y.getAsVoidPointer(); 2941} 2942 2943TemplateArgument 2944ASTContext::getCanonicalTemplateArgument(const TemplateArgument &Arg) const { 2945 switch (Arg.getKind()) { 2946 case TemplateArgument::Null: 2947 return Arg; 2948 2949 case TemplateArgument::Expression: 2950 return Arg; 2951 2952 case TemplateArgument::Declaration: 2953 return TemplateArgument(Arg.getAsDecl()->getCanonicalDecl()); 2954 2955 case TemplateArgument::Template: 2956 return TemplateArgument(getCanonicalTemplateName(Arg.getAsTemplate())); 2957 2958 case TemplateArgument::TemplateExpansion: 2959 return TemplateArgument(getCanonicalTemplateName( 2960 Arg.getAsTemplateOrTemplatePattern()), 2961 Arg.getNumTemplateExpansions()); 2962 2963 case TemplateArgument::Integral: 2964 return TemplateArgument(*Arg.getAsIntegral(), 2965 getCanonicalType(Arg.getIntegralType())); 2966 2967 case TemplateArgument::Type: 2968 return TemplateArgument(getCanonicalType(Arg.getAsType())); 2969 2970 case TemplateArgument::Pack: { 2971 if (Arg.pack_size() == 0) 2972 return Arg; 2973 2974 TemplateArgument *CanonArgs 2975 = new (*this) TemplateArgument[Arg.pack_size()]; 2976 unsigned Idx = 0; 2977 for (TemplateArgument::pack_iterator A = Arg.pack_begin(), 2978 AEnd = Arg.pack_end(); 2979 A != AEnd; (void)++A, ++Idx) 2980 CanonArgs[Idx] = getCanonicalTemplateArgument(*A); 2981 2982 return TemplateArgument(CanonArgs, Arg.pack_size()); 2983 } 2984 } 2985 2986 // Silence GCC warning 2987 assert(false && "Unhandled template argument kind"); 2988 return TemplateArgument(); 2989} 2990 2991NestedNameSpecifier * 2992ASTContext::getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) const { 2993 if (!NNS) 2994 return 0; 2995 2996 switch (NNS->getKind()) { 2997 case NestedNameSpecifier::Identifier: 2998 // Canonicalize the prefix but keep the identifier the same. 2999 return NestedNameSpecifier::Create(*this, 3000 getCanonicalNestedNameSpecifier(NNS->getPrefix()), 3001 NNS->getAsIdentifier()); 3002 3003 case NestedNameSpecifier::Namespace: 3004 // A namespace is canonical; build a nested-name-specifier with 3005 // this namespace and no prefix. 3006 return NestedNameSpecifier::Create(*this, 0, 3007 NNS->getAsNamespace()->getOriginalNamespace()); 3008 3009 case NestedNameSpecifier::NamespaceAlias: 3010 // A namespace is canonical; build a nested-name-specifier with 3011 // this namespace and no prefix. 3012 return NestedNameSpecifier::Create(*this, 0, 3013 NNS->getAsNamespaceAlias()->getNamespace() 3014 ->getOriginalNamespace()); 3015 3016 case NestedNameSpecifier::TypeSpec: 3017 case NestedNameSpecifier::TypeSpecWithTemplate: { 3018 QualType T = getCanonicalType(QualType(NNS->getAsType(), 0)); 3019 3020 // If we have some kind of dependent-named type (e.g., "typename T::type"), 3021 // break it apart into its prefix and identifier, then reconsititute those 3022 // as the canonical nested-name-specifier. This is required to canonicalize 3023 // a dependent nested-name-specifier involving typedefs of dependent-name 3024 // types, e.g., 3025 // typedef typename T::type T1; 3026 // typedef typename T1::type T2; 3027 if (const DependentNameType *DNT = T->getAs<DependentNameType>()) { 3028 NestedNameSpecifier *Prefix 3029 = getCanonicalNestedNameSpecifier(DNT->getQualifier()); 3030 return NestedNameSpecifier::Create(*this, Prefix, 3031 const_cast<IdentifierInfo *>(DNT->getIdentifier())); 3032 } 3033 3034 // Do the same thing as above, but with dependent-named specializations. 3035 if (const DependentTemplateSpecializationType *DTST 3036 = T->getAs<DependentTemplateSpecializationType>()) { 3037 NestedNameSpecifier *Prefix 3038 = getCanonicalNestedNameSpecifier(DTST->getQualifier()); 3039 3040 T = getDependentTemplateSpecializationType(DTST->getKeyword(), 3041 Prefix, DTST->getIdentifier(), 3042 DTST->getNumArgs(), 3043 DTST->getArgs()); 3044 T = getCanonicalType(T); 3045 } 3046 3047 return NestedNameSpecifier::Create(*this, 0, false, 3048 const_cast<Type*>(T.getTypePtr())); 3049 } 3050 3051 case NestedNameSpecifier::Global: 3052 // The global specifier is canonical and unique. 3053 return NNS; 3054 } 3055 3056 // Required to silence a GCC warning 3057 return 0; 3058} 3059 3060 3061const ArrayType *ASTContext::getAsArrayType(QualType T) const { 3062 // Handle the non-qualified case efficiently. 3063 if (!T.hasLocalQualifiers()) { 3064 // Handle the common positive case fast. 3065 if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 3066 return AT; 3067 } 3068 3069 // Handle the common negative case fast. 3070 if (!isa<ArrayType>(T.getCanonicalType())) 3071 return 0; 3072 3073 // Apply any qualifiers from the array type to the element type. This 3074 // implements C99 6.7.3p8: "If the specification of an array type includes 3075 // any type qualifiers, the element type is so qualified, not the array type." 3076 3077 // If we get here, we either have type qualifiers on the type, or we have 3078 // sugar such as a typedef in the way. If we have type qualifiers on the type 3079 // we must propagate them down into the element type. 3080 3081 SplitQualType split = T.getSplitDesugaredType(); 3082 Qualifiers qs = split.second; 3083 3084 // If we have a simple case, just return now. 3085 const ArrayType *ATy = dyn_cast<ArrayType>(split.first); 3086 if (ATy == 0 || qs.empty()) 3087 return ATy; 3088 3089 // Otherwise, we have an array and we have qualifiers on it. Push the 3090 // qualifiers into the array element type and return a new array type. 3091 QualType NewEltTy = getQualifiedType(ATy->getElementType(), qs); 3092 3093 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy)) 3094 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(), 3095 CAT->getSizeModifier(), 3096 CAT->getIndexTypeCVRQualifiers())); 3097 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy)) 3098 return cast<ArrayType>(getIncompleteArrayType(NewEltTy, 3099 IAT->getSizeModifier(), 3100 IAT->getIndexTypeCVRQualifiers())); 3101 3102 if (const DependentSizedArrayType *DSAT 3103 = dyn_cast<DependentSizedArrayType>(ATy)) 3104 return cast<ArrayType>( 3105 getDependentSizedArrayType(NewEltTy, 3106 DSAT->getSizeExpr(), 3107 DSAT->getSizeModifier(), 3108 DSAT->getIndexTypeCVRQualifiers(), 3109 DSAT->getBracketsRange())); 3110 3111 const VariableArrayType *VAT = cast<VariableArrayType>(ATy); 3112 return cast<ArrayType>(getVariableArrayType(NewEltTy, 3113 VAT->getSizeExpr(), 3114 VAT->getSizeModifier(), 3115 VAT->getIndexTypeCVRQualifiers(), 3116 VAT->getBracketsRange())); 3117} 3118 3119/// getArrayDecayedType - Return the properly qualified result of decaying the 3120/// specified array type to a pointer. This operation is non-trivial when 3121/// handling typedefs etc. The canonical type of "T" must be an array type, 3122/// this returns a pointer to a properly qualified element of the array. 3123/// 3124/// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 3125QualType ASTContext::getArrayDecayedType(QualType Ty) const { 3126 // Get the element type with 'getAsArrayType' so that we don't lose any 3127 // typedefs in the element type of the array. This also handles propagation 3128 // of type qualifiers from the array type into the element type if present 3129 // (C99 6.7.3p8). 3130 const ArrayType *PrettyArrayType = getAsArrayType(Ty); 3131 assert(PrettyArrayType && "Not an array type!"); 3132 3133 QualType PtrTy = getPointerType(PrettyArrayType->getElementType()); 3134 3135 // int x[restrict 4] -> int *restrict 3136 return getQualifiedType(PtrTy, PrettyArrayType->getIndexTypeQualifiers()); 3137} 3138 3139QualType ASTContext::getBaseElementType(const ArrayType *array) const { 3140 return getBaseElementType(array->getElementType()); 3141} 3142 3143QualType ASTContext::getBaseElementType(QualType type) const { 3144 Qualifiers qs; 3145 while (true) { 3146 SplitQualType split = type.getSplitDesugaredType(); 3147 const ArrayType *array = split.first->getAsArrayTypeUnsafe(); 3148 if (!array) break; 3149 3150 type = array->getElementType(); 3151 qs.addConsistentQualifiers(split.second); 3152 } 3153 3154 return getQualifiedType(type, qs); 3155} 3156 3157/// getConstantArrayElementCount - Returns number of constant array elements. 3158uint64_t 3159ASTContext::getConstantArrayElementCount(const ConstantArrayType *CA) const { 3160 uint64_t ElementCount = 1; 3161 do { 3162 ElementCount *= CA->getSize().getZExtValue(); 3163 CA = dyn_cast<ConstantArrayType>(CA->getElementType()); 3164 } while (CA); 3165 return ElementCount; 3166} 3167 3168/// getFloatingRank - Return a relative rank for floating point types. 3169/// This routine will assert if passed a built-in type that isn't a float. 3170static FloatingRank getFloatingRank(QualType T) { 3171 if (const ComplexType *CT = T->getAs<ComplexType>()) 3172 return getFloatingRank(CT->getElementType()); 3173 3174 assert(T->getAs<BuiltinType>() && "getFloatingRank(): not a floating type"); 3175 switch (T->getAs<BuiltinType>()->getKind()) { 3176 default: assert(0 && "getFloatingRank(): not a floating type"); 3177 case BuiltinType::Float: return FloatRank; 3178 case BuiltinType::Double: return DoubleRank; 3179 case BuiltinType::LongDouble: return LongDoubleRank; 3180 } 3181} 3182 3183/// getFloatingTypeOfSizeWithinDomain - Returns a real floating 3184/// point or a complex type (based on typeDomain/typeSize). 3185/// 'typeDomain' is a real floating point or complex type. 3186/// 'typeSize' is a real floating point or complex type. 3187QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size, 3188 QualType Domain) const { 3189 FloatingRank EltRank = getFloatingRank(Size); 3190 if (Domain->isComplexType()) { 3191 switch (EltRank) { 3192 default: assert(0 && "getFloatingRank(): illegal value for rank"); 3193 case FloatRank: return FloatComplexTy; 3194 case DoubleRank: return DoubleComplexTy; 3195 case LongDoubleRank: return LongDoubleComplexTy; 3196 } 3197 } 3198 3199 assert(Domain->isRealFloatingType() && "Unknown domain!"); 3200 switch (EltRank) { 3201 default: assert(0 && "getFloatingRank(): illegal value for rank"); 3202 case FloatRank: return FloatTy; 3203 case DoubleRank: return DoubleTy; 3204 case LongDoubleRank: return LongDoubleTy; 3205 } 3206} 3207 3208/// getFloatingTypeOrder - Compare the rank of the two specified floating 3209/// point types, ignoring the domain of the type (i.e. 'double' == 3210/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 3211/// LHS < RHS, return -1. 3212int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) const { 3213 FloatingRank LHSR = getFloatingRank(LHS); 3214 FloatingRank RHSR = getFloatingRank(RHS); 3215 3216 if (LHSR == RHSR) 3217 return 0; 3218 if (LHSR > RHSR) 3219 return 1; 3220 return -1; 3221} 3222 3223/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This 3224/// routine will assert if passed a built-in type that isn't an integer or enum, 3225/// or if it is not canonicalized. 3226unsigned ASTContext::getIntegerRank(const Type *T) const { 3227 assert(T->isCanonicalUnqualified() && "T should be canonicalized"); 3228 if (const EnumType* ET = dyn_cast<EnumType>(T)) 3229 T = ET->getDecl()->getPromotionType().getTypePtr(); 3230 3231 if (T->isSpecificBuiltinType(BuiltinType::WChar_S) || 3232 T->isSpecificBuiltinType(BuiltinType::WChar_U)) 3233 T = getFromTargetType(Target.getWCharType()).getTypePtr(); 3234 3235 if (T->isSpecificBuiltinType(BuiltinType::Char16)) 3236 T = getFromTargetType(Target.getChar16Type()).getTypePtr(); 3237 3238 if (T->isSpecificBuiltinType(BuiltinType::Char32)) 3239 T = getFromTargetType(Target.getChar32Type()).getTypePtr(); 3240 3241 switch (cast<BuiltinType>(T)->getKind()) { 3242 default: assert(0 && "getIntegerRank(): not a built-in integer"); 3243 case BuiltinType::Bool: 3244 return 1 + (getIntWidth(BoolTy) << 3); 3245 case BuiltinType::Char_S: 3246 case BuiltinType::Char_U: 3247 case BuiltinType::SChar: 3248 case BuiltinType::UChar: 3249 return 2 + (getIntWidth(CharTy) << 3); 3250 case BuiltinType::Short: 3251 case BuiltinType::UShort: 3252 return 3 + (getIntWidth(ShortTy) << 3); 3253 case BuiltinType::Int: 3254 case BuiltinType::UInt: 3255 return 4 + (getIntWidth(IntTy) << 3); 3256 case BuiltinType::Long: 3257 case BuiltinType::ULong: 3258 return 5 + (getIntWidth(LongTy) << 3); 3259 case BuiltinType::LongLong: 3260 case BuiltinType::ULongLong: 3261 return 6 + (getIntWidth(LongLongTy) << 3); 3262 case BuiltinType::Int128: 3263 case BuiltinType::UInt128: 3264 return 7 + (getIntWidth(Int128Ty) << 3); 3265 } 3266} 3267 3268/// \brief Whether this is a promotable bitfield reference according 3269/// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 3270/// 3271/// \returns the type this bit-field will promote to, or NULL if no 3272/// promotion occurs. 3273QualType ASTContext::isPromotableBitField(Expr *E) const { 3274 if (E->isTypeDependent() || E->isValueDependent()) 3275 return QualType(); 3276 3277 FieldDecl *Field = E->getBitField(); 3278 if (!Field) 3279 return QualType(); 3280 3281 QualType FT = Field->getType(); 3282 3283 llvm::APSInt BitWidthAP = Field->getBitWidth()->EvaluateAsInt(*this); 3284 uint64_t BitWidth = BitWidthAP.getZExtValue(); 3285 uint64_t IntSize = getTypeSize(IntTy); 3286 // GCC extension compatibility: if the bit-field size is less than or equal 3287 // to the size of int, it gets promoted no matter what its type is. 3288 // For instance, unsigned long bf : 4 gets promoted to signed int. 3289 if (BitWidth < IntSize) 3290 return IntTy; 3291 3292 if (BitWidth == IntSize) 3293 return FT->isSignedIntegerType() ? IntTy : UnsignedIntTy; 3294 3295 // Types bigger than int are not subject to promotions, and therefore act 3296 // like the base type. 3297 // FIXME: This doesn't quite match what gcc does, but what gcc does here 3298 // is ridiculous. 3299 return QualType(); 3300} 3301 3302/// getPromotedIntegerType - Returns the type that Promotable will 3303/// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 3304/// integer type. 3305QualType ASTContext::getPromotedIntegerType(QualType Promotable) const { 3306 assert(!Promotable.isNull()); 3307 assert(Promotable->isPromotableIntegerType()); 3308 if (const EnumType *ET = Promotable->getAs<EnumType>()) 3309 return ET->getDecl()->getPromotionType(); 3310 if (Promotable->isSignedIntegerType()) 3311 return IntTy; 3312 uint64_t PromotableSize = getTypeSize(Promotable); 3313 uint64_t IntSize = getTypeSize(IntTy); 3314 assert(Promotable->isUnsignedIntegerType() && PromotableSize <= IntSize); 3315 return (PromotableSize != IntSize) ? IntTy : UnsignedIntTy; 3316} 3317 3318/// getIntegerTypeOrder - Returns the highest ranked integer type: 3319/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 3320/// LHS < RHS, return -1. 3321int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) const { 3322 const Type *LHSC = getCanonicalType(LHS).getTypePtr(); 3323 const Type *RHSC = getCanonicalType(RHS).getTypePtr(); 3324 if (LHSC == RHSC) return 0; 3325 3326 bool LHSUnsigned = LHSC->isUnsignedIntegerType(); 3327 bool RHSUnsigned = RHSC->isUnsignedIntegerType(); 3328 3329 unsigned LHSRank = getIntegerRank(LHSC); 3330 unsigned RHSRank = getIntegerRank(RHSC); 3331 3332 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned. 3333 if (LHSRank == RHSRank) return 0; 3334 return LHSRank > RHSRank ? 1 : -1; 3335 } 3336 3337 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa. 3338 if (LHSUnsigned) { 3339 // If the unsigned [LHS] type is larger, return it. 3340 if (LHSRank >= RHSRank) 3341 return 1; 3342 3343 // If the signed type can represent all values of the unsigned type, it 3344 // wins. Because we are dealing with 2's complement and types that are 3345 // powers of two larger than each other, this is always safe. 3346 return -1; 3347 } 3348 3349 // If the unsigned [RHS] type is larger, return it. 3350 if (RHSRank >= LHSRank) 3351 return -1; 3352 3353 // If the signed type can represent all values of the unsigned type, it 3354 // wins. Because we are dealing with 2's complement and types that are 3355 // powers of two larger than each other, this is always safe. 3356 return 1; 3357} 3358 3359static RecordDecl * 3360CreateRecordDecl(const ASTContext &Ctx, RecordDecl::TagKind TK, DeclContext *DC, 3361 SourceLocation L, IdentifierInfo *Id) { 3362 if (Ctx.getLangOptions().CPlusPlus) 3363 return CXXRecordDecl::Create(Ctx, TK, DC, L, Id); 3364 else 3365 return RecordDecl::Create(Ctx, TK, DC, L, Id); 3366} 3367 3368// getCFConstantStringType - Return the type used for constant CFStrings. 3369QualType ASTContext::getCFConstantStringType() const { 3370 if (!CFConstantStringTypeDecl) { 3371 CFConstantStringTypeDecl = 3372 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3373 &Idents.get("NSConstantString")); 3374 CFConstantStringTypeDecl->startDefinition(); 3375 3376 QualType FieldTypes[4]; 3377 3378 // const int *isa; 3379 FieldTypes[0] = getPointerType(IntTy.withConst()); 3380 // int flags; 3381 FieldTypes[1] = IntTy; 3382 // const char *str; 3383 FieldTypes[2] = getPointerType(CharTy.withConst()); 3384 // long length; 3385 FieldTypes[3] = LongTy; 3386 3387 // Create fields 3388 for (unsigned i = 0; i < 4; ++i) { 3389 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl, 3390 SourceLocation(), 0, 3391 FieldTypes[i], /*TInfo=*/0, 3392 /*BitWidth=*/0, 3393 /*Mutable=*/false); 3394 Field->setAccess(AS_public); 3395 CFConstantStringTypeDecl->addDecl(Field); 3396 } 3397 3398 CFConstantStringTypeDecl->completeDefinition(); 3399 } 3400 3401 return getTagDeclType(CFConstantStringTypeDecl); 3402} 3403 3404void ASTContext::setCFConstantStringType(QualType T) { 3405 const RecordType *Rec = T->getAs<RecordType>(); 3406 assert(Rec && "Invalid CFConstantStringType"); 3407 CFConstantStringTypeDecl = Rec->getDecl(); 3408} 3409 3410// getNSConstantStringType - Return the type used for constant NSStrings. 3411QualType ASTContext::getNSConstantStringType() const { 3412 if (!NSConstantStringTypeDecl) { 3413 NSConstantStringTypeDecl = 3414 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3415 &Idents.get("__builtin_NSString")); 3416 NSConstantStringTypeDecl->startDefinition(); 3417 3418 QualType FieldTypes[3]; 3419 3420 // const int *isa; 3421 FieldTypes[0] = getPointerType(IntTy.withConst()); 3422 // const char *str; 3423 FieldTypes[1] = getPointerType(CharTy.withConst()); 3424 // unsigned int length; 3425 FieldTypes[2] = UnsignedIntTy; 3426 3427 // Create fields 3428 for (unsigned i = 0; i < 3; ++i) { 3429 FieldDecl *Field = FieldDecl::Create(*this, NSConstantStringTypeDecl, 3430 SourceLocation(), 0, 3431 FieldTypes[i], /*TInfo=*/0, 3432 /*BitWidth=*/0, 3433 /*Mutable=*/false); 3434 Field->setAccess(AS_public); 3435 NSConstantStringTypeDecl->addDecl(Field); 3436 } 3437 3438 NSConstantStringTypeDecl->completeDefinition(); 3439 } 3440 3441 return getTagDeclType(NSConstantStringTypeDecl); 3442} 3443 3444void ASTContext::setNSConstantStringType(QualType T) { 3445 const RecordType *Rec = T->getAs<RecordType>(); 3446 assert(Rec && "Invalid NSConstantStringType"); 3447 NSConstantStringTypeDecl = Rec->getDecl(); 3448} 3449 3450QualType ASTContext::getObjCFastEnumerationStateType() const { 3451 if (!ObjCFastEnumerationStateTypeDecl) { 3452 ObjCFastEnumerationStateTypeDecl = 3453 CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3454 &Idents.get("__objcFastEnumerationState")); 3455 ObjCFastEnumerationStateTypeDecl->startDefinition(); 3456 3457 QualType FieldTypes[] = { 3458 UnsignedLongTy, 3459 getPointerType(ObjCIdTypedefType), 3460 getPointerType(UnsignedLongTy), 3461 getConstantArrayType(UnsignedLongTy, 3462 llvm::APInt(32, 5), ArrayType::Normal, 0) 3463 }; 3464 3465 for (size_t i = 0; i < 4; ++i) { 3466 FieldDecl *Field = FieldDecl::Create(*this, 3467 ObjCFastEnumerationStateTypeDecl, 3468 SourceLocation(), 0, 3469 FieldTypes[i], /*TInfo=*/0, 3470 /*BitWidth=*/0, 3471 /*Mutable=*/false); 3472 Field->setAccess(AS_public); 3473 ObjCFastEnumerationStateTypeDecl->addDecl(Field); 3474 } 3475 3476 ObjCFastEnumerationStateTypeDecl->completeDefinition(); 3477 } 3478 3479 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 3480} 3481 3482QualType ASTContext::getBlockDescriptorType() const { 3483 if (BlockDescriptorType) 3484 return getTagDeclType(BlockDescriptorType); 3485 3486 RecordDecl *T; 3487 // FIXME: Needs the FlagAppleBlock bit. 3488 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3489 &Idents.get("__block_descriptor")); 3490 T->startDefinition(); 3491 3492 QualType FieldTypes[] = { 3493 UnsignedLongTy, 3494 UnsignedLongTy, 3495 }; 3496 3497 const char *FieldNames[] = { 3498 "reserved", 3499 "Size" 3500 }; 3501 3502 for (size_t i = 0; i < 2; ++i) { 3503 FieldDecl *Field = FieldDecl::Create(*this, 3504 T, 3505 SourceLocation(), 3506 &Idents.get(FieldNames[i]), 3507 FieldTypes[i], /*TInfo=*/0, 3508 /*BitWidth=*/0, 3509 /*Mutable=*/false); 3510 Field->setAccess(AS_public); 3511 T->addDecl(Field); 3512 } 3513 3514 T->completeDefinition(); 3515 3516 BlockDescriptorType = T; 3517 3518 return getTagDeclType(BlockDescriptorType); 3519} 3520 3521void ASTContext::setBlockDescriptorType(QualType T) { 3522 const RecordType *Rec = T->getAs<RecordType>(); 3523 assert(Rec && "Invalid BlockDescriptorType"); 3524 BlockDescriptorType = Rec->getDecl(); 3525} 3526 3527QualType ASTContext::getBlockDescriptorExtendedType() const { 3528 if (BlockDescriptorExtendedType) 3529 return getTagDeclType(BlockDescriptorExtendedType); 3530 3531 RecordDecl *T; 3532 // FIXME: Needs the FlagAppleBlock bit. 3533 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3534 &Idents.get("__block_descriptor_withcopydispose")); 3535 T->startDefinition(); 3536 3537 QualType FieldTypes[] = { 3538 UnsignedLongTy, 3539 UnsignedLongTy, 3540 getPointerType(VoidPtrTy), 3541 getPointerType(VoidPtrTy) 3542 }; 3543 3544 const char *FieldNames[] = { 3545 "reserved", 3546 "Size", 3547 "CopyFuncPtr", 3548 "DestroyFuncPtr" 3549 }; 3550 3551 for (size_t i = 0; i < 4; ++i) { 3552 FieldDecl *Field = FieldDecl::Create(*this, 3553 T, 3554 SourceLocation(), 3555 &Idents.get(FieldNames[i]), 3556 FieldTypes[i], /*TInfo=*/0, 3557 /*BitWidth=*/0, 3558 /*Mutable=*/false); 3559 Field->setAccess(AS_public); 3560 T->addDecl(Field); 3561 } 3562 3563 T->completeDefinition(); 3564 3565 BlockDescriptorExtendedType = T; 3566 3567 return getTagDeclType(BlockDescriptorExtendedType); 3568} 3569 3570void ASTContext::setBlockDescriptorExtendedType(QualType T) { 3571 const RecordType *Rec = T->getAs<RecordType>(); 3572 assert(Rec && "Invalid BlockDescriptorType"); 3573 BlockDescriptorExtendedType = Rec->getDecl(); 3574} 3575 3576bool ASTContext::BlockRequiresCopying(QualType Ty) const { 3577 if (Ty->isBlockPointerType()) 3578 return true; 3579 if (isObjCNSObjectType(Ty)) 3580 return true; 3581 if (Ty->isObjCObjectPointerType()) 3582 return true; 3583 if (getLangOptions().CPlusPlus) { 3584 if (const RecordType *RT = Ty->getAs<RecordType>()) { 3585 CXXRecordDecl *RD = cast<CXXRecordDecl>(RT->getDecl()); 3586 return RD->hasConstCopyConstructor(*this); 3587 3588 } 3589 } 3590 return false; 3591} 3592 3593QualType 3594ASTContext::BuildByRefType(llvm::StringRef DeclName, QualType Ty) const { 3595 // type = struct __Block_byref_1_X { 3596 // void *__isa; 3597 // struct __Block_byref_1_X *__forwarding; 3598 // unsigned int __flags; 3599 // unsigned int __size; 3600 // void *__copy_helper; // as needed 3601 // void *__destroy_help // as needed 3602 // int X; 3603 // } * 3604 3605 bool HasCopyAndDispose = BlockRequiresCopying(Ty); 3606 3607 // FIXME: Move up 3608 llvm::SmallString<36> Name; 3609 llvm::raw_svector_ostream(Name) << "__Block_byref_" << 3610 ++UniqueBlockByRefTypeID << '_' << DeclName; 3611 RecordDecl *T; 3612 T = CreateRecordDecl(*this, TTK_Struct, TUDecl, SourceLocation(), 3613 &Idents.get(Name.str())); 3614 T->startDefinition(); 3615 QualType Int32Ty = IntTy; 3616 assert(getIntWidth(IntTy) == 32 && "non-32bit int not supported"); 3617 QualType FieldTypes[] = { 3618 getPointerType(VoidPtrTy), 3619 getPointerType(getTagDeclType(T)), 3620 Int32Ty, 3621 Int32Ty, 3622 getPointerType(VoidPtrTy), 3623 getPointerType(VoidPtrTy), 3624 Ty 3625 }; 3626 3627 llvm::StringRef FieldNames[] = { 3628 "__isa", 3629 "__forwarding", 3630 "__flags", 3631 "__size", 3632 "__copy_helper", 3633 "__destroy_helper", 3634 DeclName, 3635 }; 3636 3637 for (size_t i = 0; i < 7; ++i) { 3638 if (!HasCopyAndDispose && i >=4 && i <= 5) 3639 continue; 3640 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3641 &Idents.get(FieldNames[i]), 3642 FieldTypes[i], /*TInfo=*/0, 3643 /*BitWidth=*/0, /*Mutable=*/false); 3644 Field->setAccess(AS_public); 3645 T->addDecl(Field); 3646 } 3647 3648 T->completeDefinition(); 3649 3650 return getPointerType(getTagDeclType(T)); 3651} 3652 3653void ASTContext::setObjCFastEnumerationStateType(QualType T) { 3654 const RecordType *Rec = T->getAs<RecordType>(); 3655 assert(Rec && "Invalid ObjCFAstEnumerationStateType"); 3656 ObjCFastEnumerationStateTypeDecl = Rec->getDecl(); 3657} 3658 3659// This returns true if a type has been typedefed to BOOL: 3660// typedef <type> BOOL; 3661static bool isTypeTypedefedAsBOOL(QualType T) { 3662 if (const TypedefType *TT = dyn_cast<TypedefType>(T)) 3663 if (IdentifierInfo *II = TT->getDecl()->getIdentifier()) 3664 return II->isStr("BOOL"); 3665 3666 return false; 3667} 3668 3669/// getObjCEncodingTypeSize returns size of type for objective-c encoding 3670/// purpose. 3671CharUnits ASTContext::getObjCEncodingTypeSize(QualType type) const { 3672 CharUnits sz = getTypeSizeInChars(type); 3673 3674 // Make all integer and enum types at least as large as an int 3675 if (sz.isPositive() && type->isIntegralOrEnumerationType()) 3676 sz = std::max(sz, getTypeSizeInChars(IntTy)); 3677 // Treat arrays as pointers, since that's how they're passed in. 3678 else if (type->isArrayType()) 3679 sz = getTypeSizeInChars(VoidPtrTy); 3680 return sz; 3681} 3682 3683static inline 3684std::string charUnitsToString(const CharUnits &CU) { 3685 return llvm::itostr(CU.getQuantity()); 3686} 3687 3688/// getObjCEncodingForBlock - Return the encoded type for this block 3689/// declaration. 3690std::string ASTContext::getObjCEncodingForBlock(const BlockExpr *Expr) const { 3691 std::string S; 3692 3693 const BlockDecl *Decl = Expr->getBlockDecl(); 3694 QualType BlockTy = 3695 Expr->getType()->getAs<BlockPointerType>()->getPointeeType(); 3696 // Encode result type. 3697 getObjCEncodingForType(BlockTy->getAs<FunctionType>()->getResultType(), S); 3698 // Compute size of all parameters. 3699 // Start with computing size of a pointer in number of bytes. 3700 // FIXME: There might(should) be a better way of doing this computation! 3701 SourceLocation Loc; 3702 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3703 CharUnits ParmOffset = PtrSize; 3704 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), 3705 E = Decl->param_end(); PI != E; ++PI) { 3706 QualType PType = (*PI)->getType(); 3707 CharUnits sz = getObjCEncodingTypeSize(PType); 3708 assert (sz.isPositive() && "BlockExpr - Incomplete param type"); 3709 ParmOffset += sz; 3710 } 3711 // Size of the argument frame 3712 S += charUnitsToString(ParmOffset); 3713 // Block pointer and offset. 3714 S += "@?0"; 3715 ParmOffset = PtrSize; 3716 3717 // Argument types. 3718 ParmOffset = PtrSize; 3719 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), E = 3720 Decl->param_end(); PI != E; ++PI) { 3721 ParmVarDecl *PVDecl = *PI; 3722 QualType PType = PVDecl->getOriginalType(); 3723 if (const ArrayType *AT = 3724 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3725 // Use array's original type only if it has known number of 3726 // elements. 3727 if (!isa<ConstantArrayType>(AT)) 3728 PType = PVDecl->getType(); 3729 } else if (PType->isFunctionType()) 3730 PType = PVDecl->getType(); 3731 getObjCEncodingForType(PType, S); 3732 S += charUnitsToString(ParmOffset); 3733 ParmOffset += getObjCEncodingTypeSize(PType); 3734 } 3735 3736 return S; 3737} 3738 3739void ASTContext::getObjCEncodingForFunctionDecl(const FunctionDecl *Decl, 3740 std::string& S) { 3741 // Encode result type. 3742 getObjCEncodingForType(Decl->getResultType(), S); 3743 CharUnits ParmOffset; 3744 // Compute size of all parameters. 3745 for (FunctionDecl::param_const_iterator PI = Decl->param_begin(), 3746 E = Decl->param_end(); PI != E; ++PI) { 3747 QualType PType = (*PI)->getType(); 3748 CharUnits sz = getObjCEncodingTypeSize(PType); 3749 assert (sz.isPositive() && 3750 "getObjCEncodingForMethodDecl - Incomplete param type"); 3751 ParmOffset += sz; 3752 } 3753 S += charUnitsToString(ParmOffset); 3754 ParmOffset = CharUnits::Zero(); 3755 3756 // Argument types. 3757 for (FunctionDecl::param_const_iterator PI = Decl->param_begin(), 3758 E = Decl->param_end(); PI != E; ++PI) { 3759 ParmVarDecl *PVDecl = *PI; 3760 QualType PType = PVDecl->getOriginalType(); 3761 if (const ArrayType *AT = 3762 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3763 // Use array's original type only if it has known number of 3764 // elements. 3765 if (!isa<ConstantArrayType>(AT)) 3766 PType = PVDecl->getType(); 3767 } else if (PType->isFunctionType()) 3768 PType = PVDecl->getType(); 3769 getObjCEncodingForType(PType, S); 3770 S += charUnitsToString(ParmOffset); 3771 ParmOffset += getObjCEncodingTypeSize(PType); 3772 } 3773} 3774 3775/// getObjCEncodingForMethodDecl - Return the encoded type for this method 3776/// declaration. 3777void ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, 3778 std::string& S) const { 3779 // FIXME: This is not very efficient. 3780 // Encode type qualifer, 'in', 'inout', etc. for the return type. 3781 getObjCEncodingForTypeQualifier(Decl->getObjCDeclQualifier(), S); 3782 // Encode result type. 3783 getObjCEncodingForType(Decl->getResultType(), S); 3784 // Compute size of all parameters. 3785 // Start with computing size of a pointer in number of bytes. 3786 // FIXME: There might(should) be a better way of doing this computation! 3787 SourceLocation Loc; 3788 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3789 // The first two arguments (self and _cmd) are pointers; account for 3790 // their size. 3791 CharUnits ParmOffset = 2 * PtrSize; 3792 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3793 E = Decl->sel_param_end(); PI != E; ++PI) { 3794 QualType PType = (*PI)->getType(); 3795 CharUnits sz = getObjCEncodingTypeSize(PType); 3796 assert (sz.isPositive() && 3797 "getObjCEncodingForMethodDecl - Incomplete param type"); 3798 ParmOffset += sz; 3799 } 3800 S += charUnitsToString(ParmOffset); 3801 S += "@0:"; 3802 S += charUnitsToString(PtrSize); 3803 3804 // Argument types. 3805 ParmOffset = 2 * PtrSize; 3806 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3807 E = Decl->sel_param_end(); PI != E; ++PI) { 3808 ParmVarDecl *PVDecl = *PI; 3809 QualType PType = PVDecl->getOriginalType(); 3810 if (const ArrayType *AT = 3811 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3812 // Use array's original type only if it has known number of 3813 // elements. 3814 if (!isa<ConstantArrayType>(AT)) 3815 PType = PVDecl->getType(); 3816 } else if (PType->isFunctionType()) 3817 PType = PVDecl->getType(); 3818 // Process argument qualifiers for user supplied arguments; such as, 3819 // 'in', 'inout', etc. 3820 getObjCEncodingForTypeQualifier(PVDecl->getObjCDeclQualifier(), S); 3821 getObjCEncodingForType(PType, S); 3822 S += charUnitsToString(ParmOffset); 3823 ParmOffset += getObjCEncodingTypeSize(PType); 3824 } 3825} 3826 3827/// getObjCEncodingForPropertyDecl - Return the encoded type for this 3828/// property declaration. If non-NULL, Container must be either an 3829/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be 3830/// NULL when getting encodings for protocol properties. 3831/// Property attributes are stored as a comma-delimited C string. The simple 3832/// attributes readonly and bycopy are encoded as single characters. The 3833/// parametrized attributes, getter=name, setter=name, and ivar=name, are 3834/// encoded as single characters, followed by an identifier. Property types 3835/// are also encoded as a parametrized attribute. The characters used to encode 3836/// these attributes are defined by the following enumeration: 3837/// @code 3838/// enum PropertyAttributes { 3839/// kPropertyReadOnly = 'R', // property is read-only. 3840/// kPropertyBycopy = 'C', // property is a copy of the value last assigned 3841/// kPropertyByref = '&', // property is a reference to the value last assigned 3842/// kPropertyDynamic = 'D', // property is dynamic 3843/// kPropertyGetter = 'G', // followed by getter selector name 3844/// kPropertySetter = 'S', // followed by setter selector name 3845/// kPropertyInstanceVariable = 'V' // followed by instance variable name 3846/// kPropertyType = 't' // followed by old-style type encoding. 3847/// kPropertyWeak = 'W' // 'weak' property 3848/// kPropertyStrong = 'P' // property GC'able 3849/// kPropertyNonAtomic = 'N' // property non-atomic 3850/// }; 3851/// @endcode 3852void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 3853 const Decl *Container, 3854 std::string& S) const { 3855 // Collect information from the property implementation decl(s). 3856 bool Dynamic = false; 3857 ObjCPropertyImplDecl *SynthesizePID = 0; 3858 3859 // FIXME: Duplicated code due to poor abstraction. 3860 if (Container) { 3861 if (const ObjCCategoryImplDecl *CID = 3862 dyn_cast<ObjCCategoryImplDecl>(Container)) { 3863 for (ObjCCategoryImplDecl::propimpl_iterator 3864 i = CID->propimpl_begin(), e = CID->propimpl_end(); 3865 i != e; ++i) { 3866 ObjCPropertyImplDecl *PID = *i; 3867 if (PID->getPropertyDecl() == PD) { 3868 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3869 Dynamic = true; 3870 } else { 3871 SynthesizePID = PID; 3872 } 3873 } 3874 } 3875 } else { 3876 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container); 3877 for (ObjCCategoryImplDecl::propimpl_iterator 3878 i = OID->propimpl_begin(), e = OID->propimpl_end(); 3879 i != e; ++i) { 3880 ObjCPropertyImplDecl *PID = *i; 3881 if (PID->getPropertyDecl() == PD) { 3882 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3883 Dynamic = true; 3884 } else { 3885 SynthesizePID = PID; 3886 } 3887 } 3888 } 3889 } 3890 } 3891 3892 // FIXME: This is not very efficient. 3893 S = "T"; 3894 3895 // Encode result type. 3896 // GCC has some special rules regarding encoding of properties which 3897 // closely resembles encoding of ivars. 3898 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, 0, 3899 true /* outermost type */, 3900 true /* encoding for property */); 3901 3902 if (PD->isReadOnly()) { 3903 S += ",R"; 3904 } else { 3905 switch (PD->getSetterKind()) { 3906 case ObjCPropertyDecl::Assign: break; 3907 case ObjCPropertyDecl::Copy: S += ",C"; break; 3908 case ObjCPropertyDecl::Retain: S += ",&"; break; 3909 } 3910 } 3911 3912 // It really isn't clear at all what this means, since properties 3913 // are "dynamic by default". 3914 if (Dynamic) 3915 S += ",D"; 3916 3917 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) 3918 S += ",N"; 3919 3920 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) { 3921 S += ",G"; 3922 S += PD->getGetterName().getAsString(); 3923 } 3924 3925 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) { 3926 S += ",S"; 3927 S += PD->getSetterName().getAsString(); 3928 } 3929 3930 if (SynthesizePID) { 3931 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl(); 3932 S += ",V"; 3933 S += OID->getNameAsString(); 3934 } 3935 3936 // FIXME: OBJCGC: weak & strong 3937} 3938 3939/// getLegacyIntegralTypeEncoding - 3940/// Another legacy compatibility encoding: 32-bit longs are encoded as 3941/// 'l' or 'L' , but not always. For typedefs, we need to use 3942/// 'i' or 'I' instead if encoding a struct field, or a pointer! 3943/// 3944void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const { 3945 if (isa<TypedefType>(PointeeTy.getTypePtr())) { 3946 if (const BuiltinType *BT = PointeeTy->getAs<BuiltinType>()) { 3947 if (BT->getKind() == BuiltinType::ULong && getIntWidth(PointeeTy) == 32) 3948 PointeeTy = UnsignedIntTy; 3949 else 3950 if (BT->getKind() == BuiltinType::Long && getIntWidth(PointeeTy) == 32) 3951 PointeeTy = IntTy; 3952 } 3953 } 3954} 3955 3956void ASTContext::getObjCEncodingForType(QualType T, std::string& S, 3957 const FieldDecl *Field) const { 3958 // We follow the behavior of gcc, expanding structures which are 3959 // directly pointed to, and expanding embedded structures. Note that 3960 // these rules are sufficient to prevent recursive encoding of the 3961 // same type. 3962 getObjCEncodingForTypeImpl(T, S, true, true, Field, 3963 true /* outermost type */); 3964} 3965 3966static char ObjCEncodingForPrimitiveKind(const ASTContext *C, QualType T) { 3967 switch (T->getAs<BuiltinType>()->getKind()) { 3968 default: assert(0 && "Unhandled builtin type kind"); 3969 case BuiltinType::Void: return 'v'; 3970 case BuiltinType::Bool: return 'B'; 3971 case BuiltinType::Char_U: 3972 case BuiltinType::UChar: return 'C'; 3973 case BuiltinType::UShort: return 'S'; 3974 case BuiltinType::UInt: return 'I'; 3975 case BuiltinType::ULong: 3976 return C->getIntWidth(T) == 32 ? 'L' : 'Q'; 3977 case BuiltinType::UInt128: return 'T'; 3978 case BuiltinType::ULongLong: return 'Q'; 3979 case BuiltinType::Char_S: 3980 case BuiltinType::SChar: return 'c'; 3981 case BuiltinType::Short: return 's'; 3982 case BuiltinType::WChar_S: 3983 case BuiltinType::WChar_U: 3984 case BuiltinType::Int: return 'i'; 3985 case BuiltinType::Long: 3986 return C->getIntWidth(T) == 32 ? 'l' : 'q'; 3987 case BuiltinType::LongLong: return 'q'; 3988 case BuiltinType::Int128: return 't'; 3989 case BuiltinType::Float: return 'f'; 3990 case BuiltinType::Double: return 'd'; 3991 case BuiltinType::LongDouble: return 'D'; 3992 } 3993} 3994 3995static void EncodeBitField(const ASTContext *Ctx, std::string& S, 3996 QualType T, const FieldDecl *FD) { 3997 const Expr *E = FD->getBitWidth(); 3998 assert(E && "bitfield width not there - getObjCEncodingForTypeImpl"); 3999 S += 'b'; 4000 // The NeXT runtime encodes bit fields as b followed by the number of bits. 4001 // The GNU runtime requires more information; bitfields are encoded as b, 4002 // then the offset (in bits) of the first element, then the type of the 4003 // bitfield, then the size in bits. For example, in this structure: 4004 // 4005 // struct 4006 // { 4007 // int integer; 4008 // int flags:2; 4009 // }; 4010 // On a 32-bit system, the encoding for flags would be b2 for the NeXT 4011 // runtime, but b32i2 for the GNU runtime. The reason for this extra 4012 // information is not especially sensible, but we're stuck with it for 4013 // compatibility with GCC, although providing it breaks anything that 4014 // actually uses runtime introspection and wants to work on both runtimes... 4015 if (!Ctx->getLangOptions().NeXTRuntime) { 4016 const RecordDecl *RD = FD->getParent(); 4017 const ASTRecordLayout &RL = Ctx->getASTRecordLayout(RD); 4018 // FIXME: This same linear search is also used in ExprConstant - it might 4019 // be better if the FieldDecl stored its offset. We'd be increasing the 4020 // size of the object slightly, but saving some time every time it is used. 4021 unsigned i = 0; 4022 for (RecordDecl::field_iterator Field = RD->field_begin(), 4023 FieldEnd = RD->field_end(); 4024 Field != FieldEnd; (void)++Field, ++i) { 4025 if (*Field == FD) 4026 break; 4027 } 4028 S += llvm::utostr(RL.getFieldOffset(i)); 4029 if (T->isEnumeralType()) 4030 S += 'i'; 4031 else 4032 S += ObjCEncodingForPrimitiveKind(Ctx, T); 4033 } 4034 unsigned N = E->EvaluateAsInt(*Ctx).getZExtValue(); 4035 S += llvm::utostr(N); 4036} 4037 4038// FIXME: Use SmallString for accumulating string. 4039void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S, 4040 bool ExpandPointedToStructures, 4041 bool ExpandStructures, 4042 const FieldDecl *FD, 4043 bool OutermostType, 4044 bool EncodingProperty) const { 4045 if (T->getAs<BuiltinType>()) { 4046 if (FD && FD->isBitField()) 4047 return EncodeBitField(this, S, T, FD); 4048 S += ObjCEncodingForPrimitiveKind(this, T); 4049 return; 4050 } 4051 4052 if (const ComplexType *CT = T->getAs<ComplexType>()) { 4053 S += 'j'; 4054 getObjCEncodingForTypeImpl(CT->getElementType(), S, false, false, 0, false, 4055 false); 4056 return; 4057 } 4058 4059 // encoding for pointer or r3eference types. 4060 QualType PointeeTy; 4061 if (const PointerType *PT = T->getAs<PointerType>()) { 4062 if (PT->isObjCSelType()) { 4063 S += ':'; 4064 return; 4065 } 4066 PointeeTy = PT->getPointeeType(); 4067 } 4068 else if (const ReferenceType *RT = T->getAs<ReferenceType>()) 4069 PointeeTy = RT->getPointeeType(); 4070 if (!PointeeTy.isNull()) { 4071 bool isReadOnly = false; 4072 // For historical/compatibility reasons, the read-only qualifier of the 4073 // pointee gets emitted _before_ the '^'. The read-only qualifier of 4074 // the pointer itself gets ignored, _unless_ we are looking at a typedef! 4075 // Also, do not emit the 'r' for anything but the outermost type! 4076 if (isa<TypedefType>(T.getTypePtr())) { 4077 if (OutermostType && T.isConstQualified()) { 4078 isReadOnly = true; 4079 S += 'r'; 4080 } 4081 } else if (OutermostType) { 4082 QualType P = PointeeTy; 4083 while (P->getAs<PointerType>()) 4084 P = P->getAs<PointerType>()->getPointeeType(); 4085 if (P.isConstQualified()) { 4086 isReadOnly = true; 4087 S += 'r'; 4088 } 4089 } 4090 if (isReadOnly) { 4091 // Another legacy compatibility encoding. Some ObjC qualifier and type 4092 // combinations need to be rearranged. 4093 // Rewrite "in const" from "nr" to "rn" 4094 if (llvm::StringRef(S).endswith("nr")) 4095 S.replace(S.end()-2, S.end(), "rn"); 4096 } 4097 4098 if (PointeeTy->isCharType()) { 4099 // char pointer types should be encoded as '*' unless it is a 4100 // type that has been typedef'd to 'BOOL'. 4101 if (!isTypeTypedefedAsBOOL(PointeeTy)) { 4102 S += '*'; 4103 return; 4104 } 4105 } else if (const RecordType *RTy = PointeeTy->getAs<RecordType>()) { 4106 // GCC binary compat: Need to convert "struct objc_class *" to "#". 4107 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_class")) { 4108 S += '#'; 4109 return; 4110 } 4111 // GCC binary compat: Need to convert "struct objc_object *" to "@". 4112 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_object")) { 4113 S += '@'; 4114 return; 4115 } 4116 // fall through... 4117 } 4118 S += '^'; 4119 getLegacyIntegralTypeEncoding(PointeeTy); 4120 4121 getObjCEncodingForTypeImpl(PointeeTy, S, false, ExpandPointedToStructures, 4122 NULL); 4123 return; 4124 } 4125 4126 if (const ArrayType *AT = 4127 // Ignore type qualifiers etc. 4128 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) { 4129 if (isa<IncompleteArrayType>(AT)) { 4130 // Incomplete arrays are encoded as a pointer to the array element. 4131 S += '^'; 4132 4133 getObjCEncodingForTypeImpl(AT->getElementType(), S, 4134 false, ExpandStructures, FD); 4135 } else { 4136 S += '['; 4137 4138 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 4139 S += llvm::utostr(CAT->getSize().getZExtValue()); 4140 else { 4141 //Variable length arrays are encoded as a regular array with 0 elements. 4142 assert(isa<VariableArrayType>(AT) && "Unknown array type!"); 4143 S += '0'; 4144 } 4145 4146 getObjCEncodingForTypeImpl(AT->getElementType(), S, 4147 false, ExpandStructures, FD); 4148 S += ']'; 4149 } 4150 return; 4151 } 4152 4153 if (T->getAs<FunctionType>()) { 4154 S += '?'; 4155 return; 4156 } 4157 4158 if (const RecordType *RTy = T->getAs<RecordType>()) { 4159 RecordDecl *RDecl = RTy->getDecl(); 4160 S += RDecl->isUnion() ? '(' : '{'; 4161 // Anonymous structures print as '?' 4162 if (const IdentifierInfo *II = RDecl->getIdentifier()) { 4163 S += II->getName(); 4164 if (ClassTemplateSpecializationDecl *Spec 4165 = dyn_cast<ClassTemplateSpecializationDecl>(RDecl)) { 4166 const TemplateArgumentList &TemplateArgs = Spec->getTemplateArgs(); 4167 std::string TemplateArgsStr 4168 = TemplateSpecializationType::PrintTemplateArgumentList( 4169 TemplateArgs.data(), 4170 TemplateArgs.size(), 4171 (*this).PrintingPolicy); 4172 4173 S += TemplateArgsStr; 4174 } 4175 } else { 4176 S += '?'; 4177 } 4178 if (ExpandStructures) { 4179 S += '='; 4180 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 4181 FieldEnd = RDecl->field_end(); 4182 Field != FieldEnd; ++Field) { 4183 if (FD) { 4184 S += '"'; 4185 S += Field->getNameAsString(); 4186 S += '"'; 4187 } 4188 4189 // Special case bit-fields. 4190 if (Field->isBitField()) { 4191 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, 4192 (*Field)); 4193 } else { 4194 QualType qt = Field->getType(); 4195 getLegacyIntegralTypeEncoding(qt); 4196 getObjCEncodingForTypeImpl(qt, S, false, true, 4197 FD); 4198 } 4199 } 4200 } 4201 S += RDecl->isUnion() ? ')' : '}'; 4202 return; 4203 } 4204 4205 if (T->isEnumeralType()) { 4206 if (FD && FD->isBitField()) 4207 EncodeBitField(this, S, T, FD); 4208 else 4209 S += 'i'; 4210 return; 4211 } 4212 4213 if (T->isBlockPointerType()) { 4214 S += "@?"; // Unlike a pointer-to-function, which is "^?". 4215 return; 4216 } 4217 4218 // Ignore protocol qualifiers when mangling at this level. 4219 if (const ObjCObjectType *OT = T->getAs<ObjCObjectType>()) 4220 T = OT->getBaseType(); 4221 4222 if (const ObjCInterfaceType *OIT = T->getAs<ObjCInterfaceType>()) { 4223 // @encode(class_name) 4224 ObjCInterfaceDecl *OI = OIT->getDecl(); 4225 S += '{'; 4226 const IdentifierInfo *II = OI->getIdentifier(); 4227 S += II->getName(); 4228 S += '='; 4229 llvm::SmallVector<ObjCIvarDecl*, 32> Ivars; 4230 DeepCollectObjCIvars(OI, true, Ivars); 4231 for (unsigned i = 0, e = Ivars.size(); i != e; ++i) { 4232 FieldDecl *Field = cast<FieldDecl>(Ivars[i]); 4233 if (Field->isBitField()) 4234 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, Field); 4235 else 4236 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, FD); 4237 } 4238 S += '}'; 4239 return; 4240 } 4241 4242 if (const ObjCObjectPointerType *OPT = T->getAs<ObjCObjectPointerType>()) { 4243 if (OPT->isObjCIdType()) { 4244 S += '@'; 4245 return; 4246 } 4247 4248 if (OPT->isObjCClassType() || OPT->isObjCQualifiedClassType()) { 4249 // FIXME: Consider if we need to output qualifiers for 'Class<p>'. 4250 // Since this is a binary compatibility issue, need to consult with runtime 4251 // folks. Fortunately, this is a *very* obsure construct. 4252 S += '#'; 4253 return; 4254 } 4255 4256 if (OPT->isObjCQualifiedIdType()) { 4257 getObjCEncodingForTypeImpl(getObjCIdType(), S, 4258 ExpandPointedToStructures, 4259 ExpandStructures, FD); 4260 if (FD || EncodingProperty) { 4261 // Note that we do extended encoding of protocol qualifer list 4262 // Only when doing ivar or property encoding. 4263 S += '"'; 4264 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 4265 E = OPT->qual_end(); I != E; ++I) { 4266 S += '<'; 4267 S += (*I)->getNameAsString(); 4268 S += '>'; 4269 } 4270 S += '"'; 4271 } 4272 return; 4273 } 4274 4275 QualType PointeeTy = OPT->getPointeeType(); 4276 if (!EncodingProperty && 4277 isa<TypedefType>(PointeeTy.getTypePtr())) { 4278 // Another historical/compatibility reason. 4279 // We encode the underlying type which comes out as 4280 // {...}; 4281 S += '^'; 4282 getObjCEncodingForTypeImpl(PointeeTy, S, 4283 false, ExpandPointedToStructures, 4284 NULL); 4285 return; 4286 } 4287 4288 S += '@'; 4289 if (OPT->getInterfaceDecl() && (FD || EncodingProperty)) { 4290 S += '"'; 4291 S += OPT->getInterfaceDecl()->getIdentifier()->getName(); 4292 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 4293 E = OPT->qual_end(); I != E; ++I) { 4294 S += '<'; 4295 S += (*I)->getNameAsString(); 4296 S += '>'; 4297 } 4298 S += '"'; 4299 } 4300 return; 4301 } 4302 4303 // gcc just blithely ignores member pointers. 4304 // TODO: maybe there should be a mangling for these 4305 if (T->getAs<MemberPointerType>()) 4306 return; 4307 4308 if (T->isVectorType()) { 4309 // This matches gcc's encoding, even though technically it is 4310 // insufficient. 4311 // FIXME. We should do a better job than gcc. 4312 return; 4313 } 4314 4315 assert(0 && "@encode for type not implemented!"); 4316} 4317 4318void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 4319 std::string& S) const { 4320 if (QT & Decl::OBJC_TQ_In) 4321 S += 'n'; 4322 if (QT & Decl::OBJC_TQ_Inout) 4323 S += 'N'; 4324 if (QT & Decl::OBJC_TQ_Out) 4325 S += 'o'; 4326 if (QT & Decl::OBJC_TQ_Bycopy) 4327 S += 'O'; 4328 if (QT & Decl::OBJC_TQ_Byref) 4329 S += 'R'; 4330 if (QT & Decl::OBJC_TQ_Oneway) 4331 S += 'V'; 4332} 4333 4334void ASTContext::setBuiltinVaListType(QualType T) { 4335 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!"); 4336 4337 BuiltinVaListType = T; 4338} 4339 4340void ASTContext::setObjCIdType(QualType T) { 4341 ObjCIdTypedefType = T; 4342} 4343 4344void ASTContext::setObjCSelType(QualType T) { 4345 ObjCSelTypedefType = T; 4346} 4347 4348void ASTContext::setObjCProtoType(QualType QT) { 4349 ObjCProtoType = QT; 4350} 4351 4352void ASTContext::setObjCClassType(QualType T) { 4353 ObjCClassTypedefType = T; 4354} 4355 4356void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) { 4357 assert(ObjCConstantStringType.isNull() && 4358 "'NSConstantString' type already set!"); 4359 4360 ObjCConstantStringType = getObjCInterfaceType(Decl); 4361} 4362 4363/// \brief Retrieve the template name that corresponds to a non-empty 4364/// lookup. 4365TemplateName 4366ASTContext::getOverloadedTemplateName(UnresolvedSetIterator Begin, 4367 UnresolvedSetIterator End) const { 4368 unsigned size = End - Begin; 4369 assert(size > 1 && "set is not overloaded!"); 4370 4371 void *memory = Allocate(sizeof(OverloadedTemplateStorage) + 4372 size * sizeof(FunctionTemplateDecl*)); 4373 OverloadedTemplateStorage *OT = new(memory) OverloadedTemplateStorage(size); 4374 4375 NamedDecl **Storage = OT->getStorage(); 4376 for (UnresolvedSetIterator I = Begin; I != End; ++I) { 4377 NamedDecl *D = *I; 4378 assert(isa<FunctionTemplateDecl>(D) || 4379 (isa<UsingShadowDecl>(D) && 4380 isa<FunctionTemplateDecl>(D->getUnderlyingDecl()))); 4381 *Storage++ = D; 4382 } 4383 4384 return TemplateName(OT); 4385} 4386 4387/// \brief Retrieve the template name that represents a qualified 4388/// template name such as \c std::vector. 4389TemplateName 4390ASTContext::getQualifiedTemplateName(NestedNameSpecifier *NNS, 4391 bool TemplateKeyword, 4392 TemplateDecl *Template) const { 4393 assert(NNS && "Missing nested-name-specifier in qualified template name"); 4394 4395 // FIXME: Canonicalization? 4396 llvm::FoldingSetNodeID ID; 4397 QualifiedTemplateName::Profile(ID, NNS, TemplateKeyword, Template); 4398 4399 void *InsertPos = 0; 4400 QualifiedTemplateName *QTN = 4401 QualifiedTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4402 if (!QTN) { 4403 QTN = new (*this,4) QualifiedTemplateName(NNS, TemplateKeyword, Template); 4404 QualifiedTemplateNames.InsertNode(QTN, InsertPos); 4405 } 4406 4407 return TemplateName(QTN); 4408} 4409 4410/// \brief Retrieve the template name that represents a dependent 4411/// template name such as \c MetaFun::template apply. 4412TemplateName 4413ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 4414 const IdentifierInfo *Name) const { 4415 assert((!NNS || NNS->isDependent()) && 4416 "Nested name specifier must be dependent"); 4417 4418 llvm::FoldingSetNodeID ID; 4419 DependentTemplateName::Profile(ID, NNS, Name); 4420 4421 void *InsertPos = 0; 4422 DependentTemplateName *QTN = 4423 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4424 4425 if (QTN) 4426 return TemplateName(QTN); 4427 4428 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 4429 if (CanonNNS == NNS) { 4430 QTN = new (*this,4) DependentTemplateName(NNS, Name); 4431 } else { 4432 TemplateName Canon = getDependentTemplateName(CanonNNS, Name); 4433 QTN = new (*this,4) DependentTemplateName(NNS, Name, Canon); 4434 DependentTemplateName *CheckQTN = 4435 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4436 assert(!CheckQTN && "Dependent type name canonicalization broken"); 4437 (void)CheckQTN; 4438 } 4439 4440 DependentTemplateNames.InsertNode(QTN, InsertPos); 4441 return TemplateName(QTN); 4442} 4443 4444/// \brief Retrieve the template name that represents a dependent 4445/// template name such as \c MetaFun::template operator+. 4446TemplateName 4447ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 4448 OverloadedOperatorKind Operator) const { 4449 assert((!NNS || NNS->isDependent()) && 4450 "Nested name specifier must be dependent"); 4451 4452 llvm::FoldingSetNodeID ID; 4453 DependentTemplateName::Profile(ID, NNS, Operator); 4454 4455 void *InsertPos = 0; 4456 DependentTemplateName *QTN 4457 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4458 4459 if (QTN) 4460 return TemplateName(QTN); 4461 4462 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 4463 if (CanonNNS == NNS) { 4464 QTN = new (*this,4) DependentTemplateName(NNS, Operator); 4465 } else { 4466 TemplateName Canon = getDependentTemplateName(CanonNNS, Operator); 4467 QTN = new (*this,4) DependentTemplateName(NNS, Operator, Canon); 4468 4469 DependentTemplateName *CheckQTN 4470 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 4471 assert(!CheckQTN && "Dependent template name canonicalization broken"); 4472 (void)CheckQTN; 4473 } 4474 4475 DependentTemplateNames.InsertNode(QTN, InsertPos); 4476 return TemplateName(QTN); 4477} 4478 4479TemplateName 4480ASTContext::getSubstTemplateTemplateParmPack(TemplateTemplateParmDecl *Param, 4481 const TemplateArgument &ArgPack) const { 4482 ASTContext &Self = const_cast<ASTContext &>(*this); 4483 llvm::FoldingSetNodeID ID; 4484 SubstTemplateTemplateParmPackStorage::Profile(ID, Self, Param, ArgPack); 4485 4486 void *InsertPos = 0; 4487 SubstTemplateTemplateParmPackStorage *Subst 4488 = SubstTemplateTemplateParmPacks.FindNodeOrInsertPos(ID, InsertPos); 4489 4490 if (!Subst) { 4491 Subst = new (*this) SubstTemplateTemplateParmPackStorage(Self, Param, 4492 ArgPack.pack_size(), 4493 ArgPack.pack_begin()); 4494 SubstTemplateTemplateParmPacks.InsertNode(Subst, InsertPos); 4495 } 4496 4497 return TemplateName(Subst); 4498} 4499 4500/// getFromTargetType - Given one of the integer types provided by 4501/// TargetInfo, produce the corresponding type. The unsigned @p Type 4502/// is actually a value of type @c TargetInfo::IntType. 4503CanQualType ASTContext::getFromTargetType(unsigned Type) const { 4504 switch (Type) { 4505 case TargetInfo::NoInt: return CanQualType(); 4506 case TargetInfo::SignedShort: return ShortTy; 4507 case TargetInfo::UnsignedShort: return UnsignedShortTy; 4508 case TargetInfo::SignedInt: return IntTy; 4509 case TargetInfo::UnsignedInt: return UnsignedIntTy; 4510 case TargetInfo::SignedLong: return LongTy; 4511 case TargetInfo::UnsignedLong: return UnsignedLongTy; 4512 case TargetInfo::SignedLongLong: return LongLongTy; 4513 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy; 4514 } 4515 4516 assert(false && "Unhandled TargetInfo::IntType value"); 4517 return CanQualType(); 4518} 4519 4520//===----------------------------------------------------------------------===// 4521// Type Predicates. 4522//===----------------------------------------------------------------------===// 4523 4524/// isObjCNSObjectType - Return true if this is an NSObject object using 4525/// NSObject attribute on a c-style pointer type. 4526/// FIXME - Make it work directly on types. 4527/// FIXME: Move to Type. 4528/// 4529bool ASTContext::isObjCNSObjectType(QualType Ty) const { 4530 if (const TypedefType *TDT = dyn_cast<TypedefType>(Ty)) { 4531 if (TypedefDecl *TD = TDT->getDecl()) 4532 if (TD->getAttr<ObjCNSObjectAttr>()) 4533 return true; 4534 } 4535 return false; 4536} 4537 4538/// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 4539/// garbage collection attribute. 4540/// 4541Qualifiers::GC ASTContext::getObjCGCAttrKind(QualType Ty) const { 4542 if (getLangOptions().getGCMode() == LangOptions::NonGC) 4543 return Qualifiers::GCNone; 4544 4545 assert(getLangOptions().ObjC1); 4546 Qualifiers::GC GCAttrs = Ty.getObjCGCAttr(); 4547 4548 // Default behaviour under objective-C's gc is for ObjC pointers 4549 // (or pointers to them) be treated as though they were declared 4550 // as __strong. 4551 if (GCAttrs == Qualifiers::GCNone) { 4552 if (Ty->isObjCObjectPointerType() || Ty->isBlockPointerType()) 4553 return Qualifiers::Strong; 4554 else if (Ty->isPointerType()) 4555 return getObjCGCAttrKind(Ty->getAs<PointerType>()->getPointeeType()); 4556 } else { 4557 // It's not valid to set GC attributes on anything that isn't a 4558 // pointer. 4559#ifndef NDEBUG 4560 QualType CT = Ty->getCanonicalTypeInternal(); 4561 while (const ArrayType *AT = dyn_cast<ArrayType>(CT)) 4562 CT = AT->getElementType(); 4563 assert(CT->isAnyPointerType() || CT->isBlockPointerType()); 4564#endif 4565 } 4566 return GCAttrs; 4567} 4568 4569//===----------------------------------------------------------------------===// 4570// Type Compatibility Testing 4571//===----------------------------------------------------------------------===// 4572 4573/// areCompatVectorTypes - Return true if the two specified vector types are 4574/// compatible. 4575static bool areCompatVectorTypes(const VectorType *LHS, 4576 const VectorType *RHS) { 4577 assert(LHS->isCanonicalUnqualified() && RHS->isCanonicalUnqualified()); 4578 return LHS->getElementType() == RHS->getElementType() && 4579 LHS->getNumElements() == RHS->getNumElements(); 4580} 4581 4582bool ASTContext::areCompatibleVectorTypes(QualType FirstVec, 4583 QualType SecondVec) { 4584 assert(FirstVec->isVectorType() && "FirstVec should be a vector type"); 4585 assert(SecondVec->isVectorType() && "SecondVec should be a vector type"); 4586 4587 if (hasSameUnqualifiedType(FirstVec, SecondVec)) 4588 return true; 4589 4590 // Treat Neon vector types and most AltiVec vector types as if they are the 4591 // equivalent GCC vector types. 4592 const VectorType *First = FirstVec->getAs<VectorType>(); 4593 const VectorType *Second = SecondVec->getAs<VectorType>(); 4594 if (First->getNumElements() == Second->getNumElements() && 4595 hasSameType(First->getElementType(), Second->getElementType()) && 4596 First->getVectorKind() != VectorType::AltiVecPixel && 4597 First->getVectorKind() != VectorType::AltiVecBool && 4598 Second->getVectorKind() != VectorType::AltiVecPixel && 4599 Second->getVectorKind() != VectorType::AltiVecBool) 4600 return true; 4601 4602 return false; 4603} 4604 4605//===----------------------------------------------------------------------===// 4606// ObjCQualifiedIdTypesAreCompatible - Compatibility testing for qualified id's. 4607//===----------------------------------------------------------------------===// 4608 4609/// ProtocolCompatibleWithProtocol - return 'true' if 'lProto' is in the 4610/// inheritance hierarchy of 'rProto'. 4611bool 4612ASTContext::ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 4613 ObjCProtocolDecl *rProto) const { 4614 if (lProto == rProto) 4615 return true; 4616 for (ObjCProtocolDecl::protocol_iterator PI = rProto->protocol_begin(), 4617 E = rProto->protocol_end(); PI != E; ++PI) 4618 if (ProtocolCompatibleWithProtocol(lProto, *PI)) 4619 return true; 4620 return false; 4621} 4622 4623/// QualifiedIdConformsQualifiedId - compare id<p,...> with id<p1,...> 4624/// return true if lhs's protocols conform to rhs's protocol; false 4625/// otherwise. 4626bool ASTContext::QualifiedIdConformsQualifiedId(QualType lhs, QualType rhs) { 4627 if (lhs->isObjCQualifiedIdType() && rhs->isObjCQualifiedIdType()) 4628 return ObjCQualifiedIdTypesAreCompatible(lhs, rhs, false); 4629 return false; 4630} 4631 4632/// ObjCQualifiedClassTypesAreCompatible - compare Class<p,...> and 4633/// Class<p1, ...>. 4634bool ASTContext::ObjCQualifiedClassTypesAreCompatible(QualType lhs, 4635 QualType rhs) { 4636 const ObjCObjectPointerType *lhsQID = lhs->getAs<ObjCObjectPointerType>(); 4637 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 4638 assert ((lhsQID && rhsOPT) && "ObjCQualifiedClassTypesAreCompatible"); 4639 4640 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4641 E = lhsQID->qual_end(); I != E; ++I) { 4642 bool match = false; 4643 ObjCProtocolDecl *lhsProto = *I; 4644 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 4645 E = rhsOPT->qual_end(); J != E; ++J) { 4646 ObjCProtocolDecl *rhsProto = *J; 4647 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto)) { 4648 match = true; 4649 break; 4650 } 4651 } 4652 if (!match) 4653 return false; 4654 } 4655 return true; 4656} 4657 4658/// ObjCQualifiedIdTypesAreCompatible - We know that one of lhs/rhs is an 4659/// ObjCQualifiedIDType. 4660bool ASTContext::ObjCQualifiedIdTypesAreCompatible(QualType lhs, QualType rhs, 4661 bool compare) { 4662 // Allow id<P..> and an 'id' or void* type in all cases. 4663 if (lhs->isVoidPointerType() || 4664 lhs->isObjCIdType() || lhs->isObjCClassType()) 4665 return true; 4666 else if (rhs->isVoidPointerType() || 4667 rhs->isObjCIdType() || rhs->isObjCClassType()) 4668 return true; 4669 4670 if (const ObjCObjectPointerType *lhsQID = lhs->getAsObjCQualifiedIdType()) { 4671 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 4672 4673 if (!rhsOPT) return false; 4674 4675 if (rhsOPT->qual_empty()) { 4676 // If the RHS is a unqualified interface pointer "NSString*", 4677 // make sure we check the class hierarchy. 4678 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4679 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4680 E = lhsQID->qual_end(); I != E; ++I) { 4681 // when comparing an id<P> on lhs with a static type on rhs, 4682 // see if static class implements all of id's protocols, directly or 4683 // through its super class and categories. 4684 if (!rhsID->ClassImplementsProtocol(*I, true)) 4685 return false; 4686 } 4687 } 4688 // If there are no qualifiers and no interface, we have an 'id'. 4689 return true; 4690 } 4691 // Both the right and left sides have qualifiers. 4692 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4693 E = lhsQID->qual_end(); I != E; ++I) { 4694 ObjCProtocolDecl *lhsProto = *I; 4695 bool match = false; 4696 4697 // when comparing an id<P> on lhs with a static type on rhs, 4698 // see if static class implements all of id's protocols, directly or 4699 // through its super class and categories. 4700 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 4701 E = rhsOPT->qual_end(); J != E; ++J) { 4702 ObjCProtocolDecl *rhsProto = *J; 4703 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4704 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4705 match = true; 4706 break; 4707 } 4708 } 4709 // If the RHS is a qualified interface pointer "NSString<P>*", 4710 // make sure we check the class hierarchy. 4711 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4712 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4713 E = lhsQID->qual_end(); I != E; ++I) { 4714 // when comparing an id<P> on lhs with a static type on rhs, 4715 // see if static class implements all of id's protocols, directly or 4716 // through its super class and categories. 4717 if (rhsID->ClassImplementsProtocol(*I, true)) { 4718 match = true; 4719 break; 4720 } 4721 } 4722 } 4723 if (!match) 4724 return false; 4725 } 4726 4727 return true; 4728 } 4729 4730 const ObjCObjectPointerType *rhsQID = rhs->getAsObjCQualifiedIdType(); 4731 assert(rhsQID && "One of the LHS/RHS should be id<x>"); 4732 4733 if (const ObjCObjectPointerType *lhsOPT = 4734 lhs->getAsObjCInterfacePointerType()) { 4735 // If both the right and left sides have qualifiers. 4736 for (ObjCObjectPointerType::qual_iterator I = lhsOPT->qual_begin(), 4737 E = lhsOPT->qual_end(); I != E; ++I) { 4738 ObjCProtocolDecl *lhsProto = *I; 4739 bool match = false; 4740 4741 // when comparing an id<P> on rhs with a static type on lhs, 4742 // see if static class implements all of id's protocols, directly or 4743 // through its super class and categories. 4744 // First, lhs protocols in the qualifier list must be found, direct 4745 // or indirect in rhs's qualifier list or it is a mismatch. 4746 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 4747 E = rhsQID->qual_end(); J != E; ++J) { 4748 ObjCProtocolDecl *rhsProto = *J; 4749 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4750 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4751 match = true; 4752 break; 4753 } 4754 } 4755 if (!match) 4756 return false; 4757 } 4758 4759 // Static class's protocols, or its super class or category protocols 4760 // must be found, direct or indirect in rhs's qualifier list or it is a mismatch. 4761 if (ObjCInterfaceDecl *lhsID = lhsOPT->getInterfaceDecl()) { 4762 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 4763 CollectInheritedProtocols(lhsID, LHSInheritedProtocols); 4764 // This is rather dubious but matches gcc's behavior. If lhs has 4765 // no type qualifier and its class has no static protocol(s) 4766 // assume that it is mismatch. 4767 if (LHSInheritedProtocols.empty() && lhsOPT->qual_empty()) 4768 return false; 4769 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 4770 LHSInheritedProtocols.begin(), 4771 E = LHSInheritedProtocols.end(); I != E; ++I) { 4772 bool match = false; 4773 ObjCProtocolDecl *lhsProto = (*I); 4774 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 4775 E = rhsQID->qual_end(); J != E; ++J) { 4776 ObjCProtocolDecl *rhsProto = *J; 4777 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4778 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4779 match = true; 4780 break; 4781 } 4782 } 4783 if (!match) 4784 return false; 4785 } 4786 } 4787 return true; 4788 } 4789 return false; 4790} 4791 4792/// canAssignObjCInterfaces - Return true if the two interface types are 4793/// compatible for assignment from RHS to LHS. This handles validation of any 4794/// protocol qualifiers on the LHS or RHS. 4795/// 4796bool ASTContext::canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 4797 const ObjCObjectPointerType *RHSOPT) { 4798 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 4799 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 4800 4801 // If either type represents the built-in 'id' or 'Class' types, return true. 4802 if (LHS->isObjCUnqualifiedIdOrClass() || 4803 RHS->isObjCUnqualifiedIdOrClass()) 4804 return true; 4805 4806 if (LHS->isObjCQualifiedId() || RHS->isObjCQualifiedId()) 4807 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4808 QualType(RHSOPT,0), 4809 false); 4810 4811 if (LHS->isObjCQualifiedClass() && RHS->isObjCQualifiedClass()) 4812 return ObjCQualifiedClassTypesAreCompatible(QualType(LHSOPT,0), 4813 QualType(RHSOPT,0)); 4814 4815 // If we have 2 user-defined types, fall into that path. 4816 if (LHS->getInterface() && RHS->getInterface()) 4817 return canAssignObjCInterfaces(LHS, RHS); 4818 4819 return false; 4820} 4821 4822/// canAssignObjCInterfacesInBlockPointer - This routine is specifically written 4823/// for providing type-safty for objective-c pointers used to pass/return 4824/// arguments in block literals. When passed as arguments, passing 'A*' where 4825/// 'id' is expected is not OK. Passing 'Sub *" where 'Super *" is expected is 4826/// not OK. For the return type, the opposite is not OK. 4827bool ASTContext::canAssignObjCInterfacesInBlockPointer( 4828 const ObjCObjectPointerType *LHSOPT, 4829 const ObjCObjectPointerType *RHSOPT) { 4830 if (RHSOPT->isObjCBuiltinType() || LHSOPT->isObjCIdType()) 4831 return true; 4832 4833 if (LHSOPT->isObjCBuiltinType()) { 4834 return RHSOPT->isObjCBuiltinType() || RHSOPT->isObjCQualifiedIdType(); 4835 } 4836 4837 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 4838 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4839 QualType(RHSOPT,0), 4840 false); 4841 4842 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4843 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4844 if (LHS && RHS) { // We have 2 user-defined types. 4845 if (LHS != RHS) { 4846 if (LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 4847 return false; 4848 if (RHS->getDecl()->isSuperClassOf(LHS->getDecl())) 4849 return true; 4850 } 4851 else 4852 return true; 4853 } 4854 return false; 4855} 4856 4857/// getIntersectionOfProtocols - This routine finds the intersection of set 4858/// of protocols inherited from two distinct objective-c pointer objects. 4859/// It is used to build composite qualifier list of the composite type of 4860/// the conditional expression involving two objective-c pointer objects. 4861static 4862void getIntersectionOfProtocols(ASTContext &Context, 4863 const ObjCObjectPointerType *LHSOPT, 4864 const ObjCObjectPointerType *RHSOPT, 4865 llvm::SmallVectorImpl<ObjCProtocolDecl *> &IntersectionOfProtocols) { 4866 4867 const ObjCObjectType* LHS = LHSOPT->getObjectType(); 4868 const ObjCObjectType* RHS = RHSOPT->getObjectType(); 4869 assert(LHS->getInterface() && "LHS must have an interface base"); 4870 assert(RHS->getInterface() && "RHS must have an interface base"); 4871 4872 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> InheritedProtocolSet; 4873 unsigned LHSNumProtocols = LHS->getNumProtocols(); 4874 if (LHSNumProtocols > 0) 4875 InheritedProtocolSet.insert(LHS->qual_begin(), LHS->qual_end()); 4876 else { 4877 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 4878 Context.CollectInheritedProtocols(LHS->getInterface(), 4879 LHSInheritedProtocols); 4880 InheritedProtocolSet.insert(LHSInheritedProtocols.begin(), 4881 LHSInheritedProtocols.end()); 4882 } 4883 4884 unsigned RHSNumProtocols = RHS->getNumProtocols(); 4885 if (RHSNumProtocols > 0) { 4886 ObjCProtocolDecl **RHSProtocols = 4887 const_cast<ObjCProtocolDecl **>(RHS->qual_begin()); 4888 for (unsigned i = 0; i < RHSNumProtocols; ++i) 4889 if (InheritedProtocolSet.count(RHSProtocols[i])) 4890 IntersectionOfProtocols.push_back(RHSProtocols[i]); 4891 } 4892 else { 4893 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> RHSInheritedProtocols; 4894 Context.CollectInheritedProtocols(RHS->getInterface(), 4895 RHSInheritedProtocols); 4896 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 4897 RHSInheritedProtocols.begin(), 4898 E = RHSInheritedProtocols.end(); I != E; ++I) 4899 if (InheritedProtocolSet.count((*I))) 4900 IntersectionOfProtocols.push_back((*I)); 4901 } 4902} 4903 4904/// areCommonBaseCompatible - Returns common base class of the two classes if 4905/// one found. Note that this is O'2 algorithm. But it will be called as the 4906/// last type comparison in a ?-exp of ObjC pointer types before a 4907/// warning is issued. So, its invokation is extremely rare. 4908QualType ASTContext::areCommonBaseCompatible( 4909 const ObjCObjectPointerType *Lptr, 4910 const ObjCObjectPointerType *Rptr) { 4911 const ObjCObjectType *LHS = Lptr->getObjectType(); 4912 const ObjCObjectType *RHS = Rptr->getObjectType(); 4913 const ObjCInterfaceDecl* LDecl = LHS->getInterface(); 4914 const ObjCInterfaceDecl* RDecl = RHS->getInterface(); 4915 if (!LDecl || !RDecl) 4916 return QualType(); 4917 4918 while ((LDecl = LDecl->getSuperClass())) { 4919 LHS = cast<ObjCInterfaceType>(getObjCInterfaceType(LDecl)); 4920 if (canAssignObjCInterfaces(LHS, RHS)) { 4921 llvm::SmallVector<ObjCProtocolDecl *, 8> Protocols; 4922 getIntersectionOfProtocols(*this, Lptr, Rptr, Protocols); 4923 4924 QualType Result = QualType(LHS, 0); 4925 if (!Protocols.empty()) 4926 Result = getObjCObjectType(Result, Protocols.data(), Protocols.size()); 4927 Result = getObjCObjectPointerType(Result); 4928 return Result; 4929 } 4930 } 4931 4932 return QualType(); 4933} 4934 4935bool ASTContext::canAssignObjCInterfaces(const ObjCObjectType *LHS, 4936 const ObjCObjectType *RHS) { 4937 assert(LHS->getInterface() && "LHS is not an interface type"); 4938 assert(RHS->getInterface() && "RHS is not an interface type"); 4939 4940 // Verify that the base decls are compatible: the RHS must be a subclass of 4941 // the LHS. 4942 if (!LHS->getInterface()->isSuperClassOf(RHS->getInterface())) 4943 return false; 4944 4945 // RHS must have a superset of the protocols in the LHS. If the LHS is not 4946 // protocol qualified at all, then we are good. 4947 if (LHS->getNumProtocols() == 0) 4948 return true; 4949 4950 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, then it 4951 // isn't a superset. 4952 if (RHS->getNumProtocols() == 0) 4953 return true; // FIXME: should return false! 4954 4955 for (ObjCObjectType::qual_iterator LHSPI = LHS->qual_begin(), 4956 LHSPE = LHS->qual_end(); 4957 LHSPI != LHSPE; LHSPI++) { 4958 bool RHSImplementsProtocol = false; 4959 4960 // If the RHS doesn't implement the protocol on the left, the types 4961 // are incompatible. 4962 for (ObjCObjectType::qual_iterator RHSPI = RHS->qual_begin(), 4963 RHSPE = RHS->qual_end(); 4964 RHSPI != RHSPE; RHSPI++) { 4965 if ((*RHSPI)->lookupProtocolNamed((*LHSPI)->getIdentifier())) { 4966 RHSImplementsProtocol = true; 4967 break; 4968 } 4969 } 4970 // FIXME: For better diagnostics, consider passing back the protocol name. 4971 if (!RHSImplementsProtocol) 4972 return false; 4973 } 4974 // The RHS implements all protocols listed on the LHS. 4975 return true; 4976} 4977 4978bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) { 4979 // get the "pointed to" types 4980 const ObjCObjectPointerType *LHSOPT = LHS->getAs<ObjCObjectPointerType>(); 4981 const ObjCObjectPointerType *RHSOPT = RHS->getAs<ObjCObjectPointerType>(); 4982 4983 if (!LHSOPT || !RHSOPT) 4984 return false; 4985 4986 return canAssignObjCInterfaces(LHSOPT, RHSOPT) || 4987 canAssignObjCInterfaces(RHSOPT, LHSOPT); 4988} 4989 4990bool ASTContext::canBindObjCObjectType(QualType To, QualType From) { 4991 return canAssignObjCInterfaces( 4992 getObjCObjectPointerType(To)->getAs<ObjCObjectPointerType>(), 4993 getObjCObjectPointerType(From)->getAs<ObjCObjectPointerType>()); 4994} 4995 4996/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible, 4997/// both shall have the identically qualified version of a compatible type. 4998/// C99 6.2.7p1: Two types have compatible types if their types are the 4999/// same. See 6.7.[2,3,5] for additional rules. 5000bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS, 5001 bool CompareUnqualified) { 5002 if (getLangOptions().CPlusPlus) 5003 return hasSameType(LHS, RHS); 5004 5005 return !mergeTypes(LHS, RHS, false, CompareUnqualified).isNull(); 5006} 5007 5008bool ASTContext::typesAreBlockPointerCompatible(QualType LHS, QualType RHS) { 5009 return !mergeTypes(LHS, RHS, true).isNull(); 5010} 5011 5012/// mergeTransparentUnionType - if T is a transparent union type and a member 5013/// of T is compatible with SubType, return the merged type, else return 5014/// QualType() 5015QualType ASTContext::mergeTransparentUnionType(QualType T, QualType SubType, 5016 bool OfBlockPointer, 5017 bool Unqualified) { 5018 if (const RecordType *UT = T->getAsUnionType()) { 5019 RecordDecl *UD = UT->getDecl(); 5020 if (UD->hasAttr<TransparentUnionAttr>()) { 5021 for (RecordDecl::field_iterator it = UD->field_begin(), 5022 itend = UD->field_end(); it != itend; ++it) { 5023 QualType ET = it->getType().getUnqualifiedType(); 5024 QualType MT = mergeTypes(ET, SubType, OfBlockPointer, Unqualified); 5025 if (!MT.isNull()) 5026 return MT; 5027 } 5028 } 5029 } 5030 5031 return QualType(); 5032} 5033 5034/// mergeFunctionArgumentTypes - merge two types which appear as function 5035/// argument types 5036QualType ASTContext::mergeFunctionArgumentTypes(QualType lhs, QualType rhs, 5037 bool OfBlockPointer, 5038 bool Unqualified) { 5039 // GNU extension: two types are compatible if they appear as a function 5040 // argument, one of the types is a transparent union type and the other 5041 // type is compatible with a union member 5042 QualType lmerge = mergeTransparentUnionType(lhs, rhs, OfBlockPointer, 5043 Unqualified); 5044 if (!lmerge.isNull()) 5045 return lmerge; 5046 5047 QualType rmerge = mergeTransparentUnionType(rhs, lhs, OfBlockPointer, 5048 Unqualified); 5049 if (!rmerge.isNull()) 5050 return rmerge; 5051 5052 return mergeTypes(lhs, rhs, OfBlockPointer, Unqualified); 5053} 5054 5055QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs, 5056 bool OfBlockPointer, 5057 bool Unqualified) { 5058 const FunctionType *lbase = lhs->getAs<FunctionType>(); 5059 const FunctionType *rbase = rhs->getAs<FunctionType>(); 5060 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 5061 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 5062 bool allLTypes = true; 5063 bool allRTypes = true; 5064 5065 // Check return type 5066 QualType retType; 5067 if (OfBlockPointer) { 5068 QualType RHS = rbase->getResultType(); 5069 QualType LHS = lbase->getResultType(); 5070 bool UnqualifiedResult = Unqualified; 5071 if (!UnqualifiedResult) 5072 UnqualifiedResult = (!RHS.hasQualifiers() && LHS.hasQualifiers()); 5073 retType = mergeTypes(RHS, LHS, true, UnqualifiedResult); 5074 } 5075 else 5076 retType = mergeTypes(lbase->getResultType(), rbase->getResultType(), false, 5077 Unqualified); 5078 if (retType.isNull()) return QualType(); 5079 5080 if (Unqualified) 5081 retType = retType.getUnqualifiedType(); 5082 5083 CanQualType LRetType = getCanonicalType(lbase->getResultType()); 5084 CanQualType RRetType = getCanonicalType(rbase->getResultType()); 5085 if (Unqualified) { 5086 LRetType = LRetType.getUnqualifiedType(); 5087 RRetType = RRetType.getUnqualifiedType(); 5088 } 5089 5090 if (getCanonicalType(retType) != LRetType) 5091 allLTypes = false; 5092 if (getCanonicalType(retType) != RRetType) 5093 allRTypes = false; 5094 5095 // FIXME: double check this 5096 // FIXME: should we error if lbase->getRegParmAttr() != 0 && 5097 // rbase->getRegParmAttr() != 0 && 5098 // lbase->getRegParmAttr() != rbase->getRegParmAttr()? 5099 FunctionType::ExtInfo lbaseInfo = lbase->getExtInfo(); 5100 FunctionType::ExtInfo rbaseInfo = rbase->getExtInfo(); 5101 5102 // Compatible functions must have compatible calling conventions 5103 if (!isSameCallConv(lbaseInfo.getCC(), rbaseInfo.getCC())) 5104 return QualType(); 5105 5106 // Regparm is part of the calling convention. 5107 if (lbaseInfo.getRegParm() != rbaseInfo.getRegParm()) 5108 return QualType(); 5109 5110 // It's noreturn if either type is. 5111 // FIXME: some uses, e.g. conditional exprs, really want this to be 'both'. 5112 bool NoReturn = lbaseInfo.getNoReturn() || rbaseInfo.getNoReturn(); 5113 if (NoReturn != lbaseInfo.getNoReturn()) 5114 allLTypes = false; 5115 if (NoReturn != rbaseInfo.getNoReturn()) 5116 allRTypes = false; 5117 5118 FunctionType::ExtInfo einfo(NoReturn, 5119 lbaseInfo.getRegParm(), 5120 lbaseInfo.getCC()); 5121 5122 if (lproto && rproto) { // two C99 style function prototypes 5123 assert(!lproto->hasExceptionSpec() && !rproto->hasExceptionSpec() && 5124 "C++ shouldn't be here"); 5125 unsigned lproto_nargs = lproto->getNumArgs(); 5126 unsigned rproto_nargs = rproto->getNumArgs(); 5127 5128 // Compatible functions must have the same number of arguments 5129 if (lproto_nargs != rproto_nargs) 5130 return QualType(); 5131 5132 // Variadic and non-variadic functions aren't compatible 5133 if (lproto->isVariadic() != rproto->isVariadic()) 5134 return QualType(); 5135 5136 if (lproto->getTypeQuals() != rproto->getTypeQuals()) 5137 return QualType(); 5138 5139 // Check argument compatibility 5140 llvm::SmallVector<QualType, 10> types; 5141 for (unsigned i = 0; i < lproto_nargs; i++) { 5142 QualType largtype = lproto->getArgType(i).getUnqualifiedType(); 5143 QualType rargtype = rproto->getArgType(i).getUnqualifiedType(); 5144 QualType argtype = mergeFunctionArgumentTypes(largtype, rargtype, 5145 OfBlockPointer, 5146 Unqualified); 5147 if (argtype.isNull()) return QualType(); 5148 5149 if (Unqualified) 5150 argtype = argtype.getUnqualifiedType(); 5151 5152 types.push_back(argtype); 5153 if (Unqualified) { 5154 largtype = largtype.getUnqualifiedType(); 5155 rargtype = rargtype.getUnqualifiedType(); 5156 } 5157 5158 if (getCanonicalType(argtype) != getCanonicalType(largtype)) 5159 allLTypes = false; 5160 if (getCanonicalType(argtype) != getCanonicalType(rargtype)) 5161 allRTypes = false; 5162 } 5163 if (allLTypes) return lhs; 5164 if (allRTypes) return rhs; 5165 5166 FunctionProtoType::ExtProtoInfo EPI = lproto->getExtProtoInfo(); 5167 EPI.ExtInfo = einfo; 5168 return getFunctionType(retType, types.begin(), types.size(), EPI); 5169 } 5170 5171 if (lproto) allRTypes = false; 5172 if (rproto) allLTypes = false; 5173 5174 const FunctionProtoType *proto = lproto ? lproto : rproto; 5175 if (proto) { 5176 assert(!proto->hasExceptionSpec() && "C++ shouldn't be here"); 5177 if (proto->isVariadic()) return QualType(); 5178 // Check that the types are compatible with the types that 5179 // would result from default argument promotions (C99 6.7.5.3p15). 5180 // The only types actually affected are promotable integer 5181 // types and floats, which would be passed as a different 5182 // type depending on whether the prototype is visible. 5183 unsigned proto_nargs = proto->getNumArgs(); 5184 for (unsigned i = 0; i < proto_nargs; ++i) { 5185 QualType argTy = proto->getArgType(i); 5186 5187 // Look at the promotion type of enum types, since that is the type used 5188 // to pass enum values. 5189 if (const EnumType *Enum = argTy->getAs<EnumType>()) 5190 argTy = Enum->getDecl()->getPromotionType(); 5191 5192 if (argTy->isPromotableIntegerType() || 5193 getCanonicalType(argTy).getUnqualifiedType() == FloatTy) 5194 return QualType(); 5195 } 5196 5197 if (allLTypes) return lhs; 5198 if (allRTypes) return rhs; 5199 5200 FunctionProtoType::ExtProtoInfo EPI = proto->getExtProtoInfo(); 5201 EPI.ExtInfo = einfo; 5202 return getFunctionType(retType, proto->arg_type_begin(), 5203 proto->getNumArgs(), EPI); 5204 } 5205 5206 if (allLTypes) return lhs; 5207 if (allRTypes) return rhs; 5208 return getFunctionNoProtoType(retType, einfo); 5209} 5210 5211QualType ASTContext::mergeTypes(QualType LHS, QualType RHS, 5212 bool OfBlockPointer, 5213 bool Unqualified) { 5214 // C++ [expr]: If an expression initially has the type "reference to T", the 5215 // type is adjusted to "T" prior to any further analysis, the expression 5216 // designates the object or function denoted by the reference, and the 5217 // expression is an lvalue unless the reference is an rvalue reference and 5218 // the expression is a function call (possibly inside parentheses). 5219 assert(!LHS->getAs<ReferenceType>() && "LHS is a reference type?"); 5220 assert(!RHS->getAs<ReferenceType>() && "RHS is a reference type?"); 5221 5222 if (Unqualified) { 5223 LHS = LHS.getUnqualifiedType(); 5224 RHS = RHS.getUnqualifiedType(); 5225 } 5226 5227 QualType LHSCan = getCanonicalType(LHS), 5228 RHSCan = getCanonicalType(RHS); 5229 5230 // If two types are identical, they are compatible. 5231 if (LHSCan == RHSCan) 5232 return LHS; 5233 5234 // If the qualifiers are different, the types aren't compatible... mostly. 5235 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 5236 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 5237 if (LQuals != RQuals) { 5238 // If any of these qualifiers are different, we have a type 5239 // mismatch. 5240 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 5241 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 5242 return QualType(); 5243 5244 // Exactly one GC qualifier difference is allowed: __strong is 5245 // okay if the other type has no GC qualifier but is an Objective 5246 // C object pointer (i.e. implicitly strong by default). We fix 5247 // this by pretending that the unqualified type was actually 5248 // qualified __strong. 5249 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 5250 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 5251 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 5252 5253 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 5254 return QualType(); 5255 5256 if (GC_L == Qualifiers::Strong && RHSCan->isObjCObjectPointerType()) { 5257 return mergeTypes(LHS, getObjCGCQualType(RHS, Qualifiers::Strong)); 5258 } 5259 if (GC_R == Qualifiers::Strong && LHSCan->isObjCObjectPointerType()) { 5260 return mergeTypes(getObjCGCQualType(LHS, Qualifiers::Strong), RHS); 5261 } 5262 return QualType(); 5263 } 5264 5265 // Okay, qualifiers are equal. 5266 5267 Type::TypeClass LHSClass = LHSCan->getTypeClass(); 5268 Type::TypeClass RHSClass = RHSCan->getTypeClass(); 5269 5270 // We want to consider the two function types to be the same for these 5271 // comparisons, just force one to the other. 5272 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto; 5273 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto; 5274 5275 // Same as above for arrays 5276 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray) 5277 LHSClass = Type::ConstantArray; 5278 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray) 5279 RHSClass = Type::ConstantArray; 5280 5281 // ObjCInterfaces are just specialized ObjCObjects. 5282 if (LHSClass == Type::ObjCInterface) LHSClass = Type::ObjCObject; 5283 if (RHSClass == Type::ObjCInterface) RHSClass = Type::ObjCObject; 5284 5285 // Canonicalize ExtVector -> Vector. 5286 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector; 5287 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector; 5288 5289 // If the canonical type classes don't match. 5290 if (LHSClass != RHSClass) { 5291 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char, 5292 // a signed integer type, or an unsigned integer type. 5293 // Compatibility is based on the underlying type, not the promotion 5294 // type. 5295 if (const EnumType* ETy = LHS->getAs<EnumType>()) { 5296 if (ETy->getDecl()->getIntegerType() == RHSCan.getUnqualifiedType()) 5297 return RHS; 5298 } 5299 if (const EnumType* ETy = RHS->getAs<EnumType>()) { 5300 if (ETy->getDecl()->getIntegerType() == LHSCan.getUnqualifiedType()) 5301 return LHS; 5302 } 5303 5304 return QualType(); 5305 } 5306 5307 // The canonical type classes match. 5308 switch (LHSClass) { 5309#define TYPE(Class, Base) 5310#define ABSTRACT_TYPE(Class, Base) 5311#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) case Type::Class: 5312#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 5313#define DEPENDENT_TYPE(Class, Base) case Type::Class: 5314#include "clang/AST/TypeNodes.def" 5315 assert(false && "Non-canonical and dependent types shouldn't get here"); 5316 return QualType(); 5317 5318 case Type::LValueReference: 5319 case Type::RValueReference: 5320 case Type::MemberPointer: 5321 assert(false && "C++ should never be in mergeTypes"); 5322 return QualType(); 5323 5324 case Type::ObjCInterface: 5325 case Type::IncompleteArray: 5326 case Type::VariableArray: 5327 case Type::FunctionProto: 5328 case Type::ExtVector: 5329 assert(false && "Types are eliminated above"); 5330 return QualType(); 5331 5332 case Type::Pointer: 5333 { 5334 // Merge two pointer types, while trying to preserve typedef info 5335 QualType LHSPointee = LHS->getAs<PointerType>()->getPointeeType(); 5336 QualType RHSPointee = RHS->getAs<PointerType>()->getPointeeType(); 5337 if (Unqualified) { 5338 LHSPointee = LHSPointee.getUnqualifiedType(); 5339 RHSPointee = RHSPointee.getUnqualifiedType(); 5340 } 5341 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, false, 5342 Unqualified); 5343 if (ResultType.isNull()) return QualType(); 5344 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 5345 return LHS; 5346 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 5347 return RHS; 5348 return getPointerType(ResultType); 5349 } 5350 case Type::BlockPointer: 5351 { 5352 // Merge two block pointer types, while trying to preserve typedef info 5353 QualType LHSPointee = LHS->getAs<BlockPointerType>()->getPointeeType(); 5354 QualType RHSPointee = RHS->getAs<BlockPointerType>()->getPointeeType(); 5355 if (Unqualified) { 5356 LHSPointee = LHSPointee.getUnqualifiedType(); 5357 RHSPointee = RHSPointee.getUnqualifiedType(); 5358 } 5359 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, OfBlockPointer, 5360 Unqualified); 5361 if (ResultType.isNull()) return QualType(); 5362 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 5363 return LHS; 5364 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 5365 return RHS; 5366 return getBlockPointerType(ResultType); 5367 } 5368 case Type::ConstantArray: 5369 { 5370 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS); 5371 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS); 5372 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize()) 5373 return QualType(); 5374 5375 QualType LHSElem = getAsArrayType(LHS)->getElementType(); 5376 QualType RHSElem = getAsArrayType(RHS)->getElementType(); 5377 if (Unqualified) { 5378 LHSElem = LHSElem.getUnqualifiedType(); 5379 RHSElem = RHSElem.getUnqualifiedType(); 5380 } 5381 5382 QualType ResultType = mergeTypes(LHSElem, RHSElem, false, Unqualified); 5383 if (ResultType.isNull()) return QualType(); 5384 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 5385 return LHS; 5386 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 5387 return RHS; 5388 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(), 5389 ArrayType::ArraySizeModifier(), 0); 5390 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(), 5391 ArrayType::ArraySizeModifier(), 0); 5392 const VariableArrayType* LVAT = getAsVariableArrayType(LHS); 5393 const VariableArrayType* RVAT = getAsVariableArrayType(RHS); 5394 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 5395 return LHS; 5396 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 5397 return RHS; 5398 if (LVAT) { 5399 // FIXME: This isn't correct! But tricky to implement because 5400 // the array's size has to be the size of LHS, but the type 5401 // has to be different. 5402 return LHS; 5403 } 5404 if (RVAT) { 5405 // FIXME: This isn't correct! But tricky to implement because 5406 // the array's size has to be the size of RHS, but the type 5407 // has to be different. 5408 return RHS; 5409 } 5410 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS; 5411 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS; 5412 return getIncompleteArrayType(ResultType, 5413 ArrayType::ArraySizeModifier(), 0); 5414 } 5415 case Type::FunctionNoProto: 5416 return mergeFunctionTypes(LHS, RHS, OfBlockPointer, Unqualified); 5417 case Type::Record: 5418 case Type::Enum: 5419 return QualType(); 5420 case Type::Builtin: 5421 // Only exactly equal builtin types are compatible, which is tested above. 5422 return QualType(); 5423 case Type::Complex: 5424 // Distinct complex types are incompatible. 5425 return QualType(); 5426 case Type::Vector: 5427 // FIXME: The merged type should be an ExtVector! 5428 if (areCompatVectorTypes(LHSCan->getAs<VectorType>(), 5429 RHSCan->getAs<VectorType>())) 5430 return LHS; 5431 return QualType(); 5432 case Type::ObjCObject: { 5433 // Check if the types are assignment compatible. 5434 // FIXME: This should be type compatibility, e.g. whether 5435 // "LHS x; RHS x;" at global scope is legal. 5436 const ObjCObjectType* LHSIface = LHS->getAs<ObjCObjectType>(); 5437 const ObjCObjectType* RHSIface = RHS->getAs<ObjCObjectType>(); 5438 if (canAssignObjCInterfaces(LHSIface, RHSIface)) 5439 return LHS; 5440 5441 return QualType(); 5442 } 5443 case Type::ObjCObjectPointer: { 5444 if (OfBlockPointer) { 5445 if (canAssignObjCInterfacesInBlockPointer( 5446 LHS->getAs<ObjCObjectPointerType>(), 5447 RHS->getAs<ObjCObjectPointerType>())) 5448 return LHS; 5449 return QualType(); 5450 } 5451 if (canAssignObjCInterfaces(LHS->getAs<ObjCObjectPointerType>(), 5452 RHS->getAs<ObjCObjectPointerType>())) 5453 return LHS; 5454 5455 return QualType(); 5456 } 5457 } 5458 5459 return QualType(); 5460} 5461 5462/// mergeObjCGCQualifiers - This routine merges ObjC's GC attribute of 'LHS' and 5463/// 'RHS' attributes and returns the merged version; including for function 5464/// return types. 5465QualType ASTContext::mergeObjCGCQualifiers(QualType LHS, QualType RHS) { 5466 QualType LHSCan = getCanonicalType(LHS), 5467 RHSCan = getCanonicalType(RHS); 5468 // If two types are identical, they are compatible. 5469 if (LHSCan == RHSCan) 5470 return LHS; 5471 if (RHSCan->isFunctionType()) { 5472 if (!LHSCan->isFunctionType()) 5473 return QualType(); 5474 QualType OldReturnType = 5475 cast<FunctionType>(RHSCan.getTypePtr())->getResultType(); 5476 QualType NewReturnType = 5477 cast<FunctionType>(LHSCan.getTypePtr())->getResultType(); 5478 QualType ResReturnType = 5479 mergeObjCGCQualifiers(NewReturnType, OldReturnType); 5480 if (ResReturnType.isNull()) 5481 return QualType(); 5482 if (ResReturnType == NewReturnType || ResReturnType == OldReturnType) { 5483 // id foo(); ... __strong id foo(); or: __strong id foo(); ... id foo(); 5484 // In either case, use OldReturnType to build the new function type. 5485 const FunctionType *F = LHS->getAs<FunctionType>(); 5486 if (const FunctionProtoType *FPT = cast<FunctionProtoType>(F)) { 5487 FunctionProtoType::ExtProtoInfo EPI = FPT->getExtProtoInfo(); 5488 EPI.ExtInfo = getFunctionExtInfo(LHS); 5489 QualType ResultType 5490 = getFunctionType(OldReturnType, FPT->arg_type_begin(), 5491 FPT->getNumArgs(), EPI); 5492 return ResultType; 5493 } 5494 } 5495 return QualType(); 5496 } 5497 5498 // If the qualifiers are different, the types can still be merged. 5499 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 5500 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 5501 if (LQuals != RQuals) { 5502 // If any of these qualifiers are different, we have a type mismatch. 5503 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 5504 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 5505 return QualType(); 5506 5507 // Exactly one GC qualifier difference is allowed: __strong is 5508 // okay if the other type has no GC qualifier but is an Objective 5509 // C object pointer (i.e. implicitly strong by default). We fix 5510 // this by pretending that the unqualified type was actually 5511 // qualified __strong. 5512 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 5513 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 5514 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 5515 5516 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 5517 return QualType(); 5518 5519 if (GC_L == Qualifiers::Strong) 5520 return LHS; 5521 if (GC_R == Qualifiers::Strong) 5522 return RHS; 5523 return QualType(); 5524 } 5525 5526 if (LHSCan->isObjCObjectPointerType() && RHSCan->isObjCObjectPointerType()) { 5527 QualType LHSBaseQT = LHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 5528 QualType RHSBaseQT = RHS->getAs<ObjCObjectPointerType>()->getPointeeType(); 5529 QualType ResQT = mergeObjCGCQualifiers(LHSBaseQT, RHSBaseQT); 5530 if (ResQT == LHSBaseQT) 5531 return LHS; 5532 if (ResQT == RHSBaseQT) 5533 return RHS; 5534 } 5535 return QualType(); 5536} 5537 5538//===----------------------------------------------------------------------===// 5539// Integer Predicates 5540//===----------------------------------------------------------------------===// 5541 5542unsigned ASTContext::getIntWidth(QualType T) const { 5543 if (const EnumType *ET = dyn_cast<EnumType>(T)) 5544 T = ET->getDecl()->getIntegerType(); 5545 if (T->isBooleanType()) 5546 return 1; 5547 // For builtin types, just use the standard type sizing method 5548 return (unsigned)getTypeSize(T); 5549} 5550 5551QualType ASTContext::getCorrespondingUnsignedType(QualType T) { 5552 assert(T->hasSignedIntegerRepresentation() && "Unexpected type"); 5553 5554 // Turn <4 x signed int> -> <4 x unsigned int> 5555 if (const VectorType *VTy = T->getAs<VectorType>()) 5556 return getVectorType(getCorrespondingUnsignedType(VTy->getElementType()), 5557 VTy->getNumElements(), VTy->getVectorKind()); 5558 5559 // For enums, we return the unsigned version of the base type. 5560 if (const EnumType *ETy = T->getAs<EnumType>()) 5561 T = ETy->getDecl()->getIntegerType(); 5562 5563 const BuiltinType *BTy = T->getAs<BuiltinType>(); 5564 assert(BTy && "Unexpected signed integer type"); 5565 switch (BTy->getKind()) { 5566 case BuiltinType::Char_S: 5567 case BuiltinType::SChar: 5568 return UnsignedCharTy; 5569 case BuiltinType::Short: 5570 return UnsignedShortTy; 5571 case BuiltinType::Int: 5572 return UnsignedIntTy; 5573 case BuiltinType::Long: 5574 return UnsignedLongTy; 5575 case BuiltinType::LongLong: 5576 return UnsignedLongLongTy; 5577 case BuiltinType::Int128: 5578 return UnsignedInt128Ty; 5579 default: 5580 assert(0 && "Unexpected signed integer type"); 5581 return QualType(); 5582 } 5583} 5584 5585ASTMutationListener::~ASTMutationListener() { } 5586 5587 5588//===----------------------------------------------------------------------===// 5589// Builtin Type Computation 5590//===----------------------------------------------------------------------===// 5591 5592/// DecodeTypeFromStr - This decodes one type descriptor from Str, advancing the 5593/// pointer over the consumed characters. This returns the resultant type. If 5594/// AllowTypeModifiers is false then modifier like * are not parsed, just basic 5595/// types. This allows "v2i*" to be parsed as a pointer to a v2i instead of 5596/// a vector of "i*". 5597/// 5598/// RequiresICE is filled in on return to indicate whether the value is required 5599/// to be an Integer Constant Expression. 5600static QualType DecodeTypeFromStr(const char *&Str, const ASTContext &Context, 5601 ASTContext::GetBuiltinTypeError &Error, 5602 bool &RequiresICE, 5603 bool AllowTypeModifiers) { 5604 // Modifiers. 5605 int HowLong = 0; 5606 bool Signed = false, Unsigned = false; 5607 RequiresICE = false; 5608 5609 // Read the prefixed modifiers first. 5610 bool Done = false; 5611 while (!Done) { 5612 switch (*Str++) { 5613 default: Done = true; --Str; break; 5614 case 'I': 5615 RequiresICE = true; 5616 break; 5617 case 'S': 5618 assert(!Unsigned && "Can't use both 'S' and 'U' modifiers!"); 5619 assert(!Signed && "Can't use 'S' modifier multiple times!"); 5620 Signed = true; 5621 break; 5622 case 'U': 5623 assert(!Signed && "Can't use both 'S' and 'U' modifiers!"); 5624 assert(!Unsigned && "Can't use 'S' modifier multiple times!"); 5625 Unsigned = true; 5626 break; 5627 case 'L': 5628 assert(HowLong <= 2 && "Can't have LLLL modifier"); 5629 ++HowLong; 5630 break; 5631 } 5632 } 5633 5634 QualType Type; 5635 5636 // Read the base type. 5637 switch (*Str++) { 5638 default: assert(0 && "Unknown builtin type letter!"); 5639 case 'v': 5640 assert(HowLong == 0 && !Signed && !Unsigned && 5641 "Bad modifiers used with 'v'!"); 5642 Type = Context.VoidTy; 5643 break; 5644 case 'f': 5645 assert(HowLong == 0 && !Signed && !Unsigned && 5646 "Bad modifiers used with 'f'!"); 5647 Type = Context.FloatTy; 5648 break; 5649 case 'd': 5650 assert(HowLong < 2 && !Signed && !Unsigned && 5651 "Bad modifiers used with 'd'!"); 5652 if (HowLong) 5653 Type = Context.LongDoubleTy; 5654 else 5655 Type = Context.DoubleTy; 5656 break; 5657 case 's': 5658 assert(HowLong == 0 && "Bad modifiers used with 's'!"); 5659 if (Unsigned) 5660 Type = Context.UnsignedShortTy; 5661 else 5662 Type = Context.ShortTy; 5663 break; 5664 case 'i': 5665 if (HowLong == 3) 5666 Type = Unsigned ? Context.UnsignedInt128Ty : Context.Int128Ty; 5667 else if (HowLong == 2) 5668 Type = Unsigned ? Context.UnsignedLongLongTy : Context.LongLongTy; 5669 else if (HowLong == 1) 5670 Type = Unsigned ? Context.UnsignedLongTy : Context.LongTy; 5671 else 5672 Type = Unsigned ? Context.UnsignedIntTy : Context.IntTy; 5673 break; 5674 case 'c': 5675 assert(HowLong == 0 && "Bad modifiers used with 'c'!"); 5676 if (Signed) 5677 Type = Context.SignedCharTy; 5678 else if (Unsigned) 5679 Type = Context.UnsignedCharTy; 5680 else 5681 Type = Context.CharTy; 5682 break; 5683 case 'b': // boolean 5684 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'b'!"); 5685 Type = Context.BoolTy; 5686 break; 5687 case 'z': // size_t. 5688 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'z'!"); 5689 Type = Context.getSizeType(); 5690 break; 5691 case 'F': 5692 Type = Context.getCFConstantStringType(); 5693 break; 5694 case 'G': 5695 Type = Context.getObjCIdType(); 5696 break; 5697 case 'H': 5698 Type = Context.getObjCSelType(); 5699 break; 5700 case 'a': 5701 Type = Context.getBuiltinVaListType(); 5702 assert(!Type.isNull() && "builtin va list type not initialized!"); 5703 break; 5704 case 'A': 5705 // This is a "reference" to a va_list; however, what exactly 5706 // this means depends on how va_list is defined. There are two 5707 // different kinds of va_list: ones passed by value, and ones 5708 // passed by reference. An example of a by-value va_list is 5709 // x86, where va_list is a char*. An example of by-ref va_list 5710 // is x86-64, where va_list is a __va_list_tag[1]. For x86, 5711 // we want this argument to be a char*&; for x86-64, we want 5712 // it to be a __va_list_tag*. 5713 Type = Context.getBuiltinVaListType(); 5714 assert(!Type.isNull() && "builtin va list type not initialized!"); 5715 if (Type->isArrayType()) 5716 Type = Context.getArrayDecayedType(Type); 5717 else 5718 Type = Context.getLValueReferenceType(Type); 5719 break; 5720 case 'V': { 5721 char *End; 5722 unsigned NumElements = strtoul(Str, &End, 10); 5723 assert(End != Str && "Missing vector size"); 5724 Str = End; 5725 5726 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, 5727 RequiresICE, false); 5728 assert(!RequiresICE && "Can't require vector ICE"); 5729 5730 // TODO: No way to make AltiVec vectors in builtins yet. 5731 Type = Context.getVectorType(ElementType, NumElements, 5732 VectorType::GenericVector); 5733 break; 5734 } 5735 case 'X': { 5736 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, RequiresICE, 5737 false); 5738 assert(!RequiresICE && "Can't require complex ICE"); 5739 Type = Context.getComplexType(ElementType); 5740 break; 5741 } 5742 case 'P': 5743 Type = Context.getFILEType(); 5744 if (Type.isNull()) { 5745 Error = ASTContext::GE_Missing_stdio; 5746 return QualType(); 5747 } 5748 break; 5749 case 'J': 5750 if (Signed) 5751 Type = Context.getsigjmp_bufType(); 5752 else 5753 Type = Context.getjmp_bufType(); 5754 5755 if (Type.isNull()) { 5756 Error = ASTContext::GE_Missing_setjmp; 5757 return QualType(); 5758 } 5759 break; 5760 } 5761 5762 // If there are modifiers and if we're allowed to parse them, go for it. 5763 Done = !AllowTypeModifiers; 5764 while (!Done) { 5765 switch (char c = *Str++) { 5766 default: Done = true; --Str; break; 5767 case '*': 5768 case '&': { 5769 // Both pointers and references can have their pointee types 5770 // qualified with an address space. 5771 char *End; 5772 unsigned AddrSpace = strtoul(Str, &End, 10); 5773 if (End != Str && AddrSpace != 0) { 5774 Type = Context.getAddrSpaceQualType(Type, AddrSpace); 5775 Str = End; 5776 } 5777 if (c == '*') 5778 Type = Context.getPointerType(Type); 5779 else 5780 Type = Context.getLValueReferenceType(Type); 5781 break; 5782 } 5783 // FIXME: There's no way to have a built-in with an rvalue ref arg. 5784 case 'C': 5785 Type = Type.withConst(); 5786 break; 5787 case 'D': 5788 Type = Context.getVolatileType(Type); 5789 break; 5790 } 5791 } 5792 5793 assert((!RequiresICE || Type->isIntegralOrEnumerationType()) && 5794 "Integer constant 'I' type must be an integer"); 5795 5796 return Type; 5797} 5798 5799/// GetBuiltinType - Return the type for the specified builtin. 5800QualType ASTContext::GetBuiltinType(unsigned Id, 5801 GetBuiltinTypeError &Error, 5802 unsigned *IntegerConstantArgs) const { 5803 const char *TypeStr = BuiltinInfo.GetTypeString(Id); 5804 5805 llvm::SmallVector<QualType, 8> ArgTypes; 5806 5807 bool RequiresICE = false; 5808 Error = GE_None; 5809 QualType ResType = DecodeTypeFromStr(TypeStr, *this, Error, 5810 RequiresICE, true); 5811 if (Error != GE_None) 5812 return QualType(); 5813 5814 assert(!RequiresICE && "Result of intrinsic cannot be required to be an ICE"); 5815 5816 while (TypeStr[0] && TypeStr[0] != '.') { 5817 QualType Ty = DecodeTypeFromStr(TypeStr, *this, Error, RequiresICE, true); 5818 if (Error != GE_None) 5819 return QualType(); 5820 5821 // If this argument is required to be an IntegerConstantExpression and the 5822 // caller cares, fill in the bitmask we return. 5823 if (RequiresICE && IntegerConstantArgs) 5824 *IntegerConstantArgs |= 1 << ArgTypes.size(); 5825 5826 // Do array -> pointer decay. The builtin should use the decayed type. 5827 if (Ty->isArrayType()) 5828 Ty = getArrayDecayedType(Ty); 5829 5830 ArgTypes.push_back(Ty); 5831 } 5832 5833 assert((TypeStr[0] != '.' || TypeStr[1] == 0) && 5834 "'.' should only occur at end of builtin type list!"); 5835 5836 FunctionType::ExtInfo EI; 5837 if (BuiltinInfo.isNoReturn(Id)) EI = EI.withNoReturn(true); 5838 5839 bool Variadic = (TypeStr[0] == '.'); 5840 5841 // We really shouldn't be making a no-proto type here, especially in C++. 5842 if (ArgTypes.empty() && Variadic) 5843 return getFunctionNoProtoType(ResType, EI); 5844 5845 FunctionProtoType::ExtProtoInfo EPI; 5846 EPI.ExtInfo = EI; 5847 EPI.Variadic = Variadic; 5848 5849 return getFunctionType(ResType, ArgTypes.data(), ArgTypes.size(), EPI); 5850} 5851 5852GVALinkage ASTContext::GetGVALinkageForFunction(const FunctionDecl *FD) { 5853 GVALinkage External = GVA_StrongExternal; 5854 5855 Linkage L = FD->getLinkage(); 5856 switch (L) { 5857 case NoLinkage: 5858 case InternalLinkage: 5859 case UniqueExternalLinkage: 5860 return GVA_Internal; 5861 5862 case ExternalLinkage: 5863 switch (FD->getTemplateSpecializationKind()) { 5864 case TSK_Undeclared: 5865 case TSK_ExplicitSpecialization: 5866 External = GVA_StrongExternal; 5867 break; 5868 5869 case TSK_ExplicitInstantiationDefinition: 5870 return GVA_ExplicitTemplateInstantiation; 5871 5872 case TSK_ExplicitInstantiationDeclaration: 5873 case TSK_ImplicitInstantiation: 5874 External = GVA_TemplateInstantiation; 5875 break; 5876 } 5877 } 5878 5879 if (!FD->isInlined()) 5880 return External; 5881 5882 if (!getLangOptions().CPlusPlus || FD->hasAttr<GNUInlineAttr>()) { 5883 // GNU or C99 inline semantics. Determine whether this symbol should be 5884 // externally visible. 5885 if (FD->isInlineDefinitionExternallyVisible()) 5886 return External; 5887 5888 // C99 inline semantics, where the symbol is not externally visible. 5889 return GVA_C99Inline; 5890 } 5891 5892 // C++0x [temp.explicit]p9: 5893 // [ Note: The intent is that an inline function that is the subject of 5894 // an explicit instantiation declaration will still be implicitly 5895 // instantiated when used so that the body can be considered for 5896 // inlining, but that no out-of-line copy of the inline function would be 5897 // generated in the translation unit. -- end note ] 5898 if (FD->getTemplateSpecializationKind() 5899 == TSK_ExplicitInstantiationDeclaration) 5900 return GVA_C99Inline; 5901 5902 return GVA_CXXInline; 5903} 5904 5905GVALinkage ASTContext::GetGVALinkageForVariable(const VarDecl *VD) { 5906 // If this is a static data member, compute the kind of template 5907 // specialization. Otherwise, this variable is not part of a 5908 // template. 5909 TemplateSpecializationKind TSK = TSK_Undeclared; 5910 if (VD->isStaticDataMember()) 5911 TSK = VD->getTemplateSpecializationKind(); 5912 5913 Linkage L = VD->getLinkage(); 5914 if (L == ExternalLinkage && getLangOptions().CPlusPlus && 5915 VD->getType()->getLinkage() == UniqueExternalLinkage) 5916 L = UniqueExternalLinkage; 5917 5918 switch (L) { 5919 case NoLinkage: 5920 case InternalLinkage: 5921 case UniqueExternalLinkage: 5922 return GVA_Internal; 5923 5924 case ExternalLinkage: 5925 switch (TSK) { 5926 case TSK_Undeclared: 5927 case TSK_ExplicitSpecialization: 5928 return GVA_StrongExternal; 5929 5930 case TSK_ExplicitInstantiationDeclaration: 5931 llvm_unreachable("Variable should not be instantiated"); 5932 // Fall through to treat this like any other instantiation. 5933 5934 case TSK_ExplicitInstantiationDefinition: 5935 return GVA_ExplicitTemplateInstantiation; 5936 5937 case TSK_ImplicitInstantiation: 5938 return GVA_TemplateInstantiation; 5939 } 5940 } 5941 5942 return GVA_StrongExternal; 5943} 5944 5945bool ASTContext::DeclMustBeEmitted(const Decl *D) { 5946 if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { 5947 if (!VD->isFileVarDecl()) 5948 return false; 5949 } else if (!isa<FunctionDecl>(D)) 5950 return false; 5951 5952 // Weak references don't produce any output by themselves. 5953 if (D->hasAttr<WeakRefAttr>()) 5954 return false; 5955 5956 // Aliases and used decls are required. 5957 if (D->hasAttr<AliasAttr>() || D->hasAttr<UsedAttr>()) 5958 return true; 5959 5960 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) { 5961 // Forward declarations aren't required. 5962 if (!FD->isThisDeclarationADefinition()) 5963 return false; 5964 5965 // Constructors and destructors are required. 5966 if (FD->hasAttr<ConstructorAttr>() || FD->hasAttr<DestructorAttr>()) 5967 return true; 5968 5969 // The key function for a class is required. 5970 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) { 5971 const CXXRecordDecl *RD = MD->getParent(); 5972 if (MD->isOutOfLine() && RD->isDynamicClass()) { 5973 const CXXMethodDecl *KeyFunc = getKeyFunction(RD); 5974 if (KeyFunc && KeyFunc->getCanonicalDecl() == MD->getCanonicalDecl()) 5975 return true; 5976 } 5977 } 5978 5979 GVALinkage Linkage = GetGVALinkageForFunction(FD); 5980 5981 // static, static inline, always_inline, and extern inline functions can 5982 // always be deferred. Normal inline functions can be deferred in C99/C++. 5983 // Implicit template instantiations can also be deferred in C++. 5984 if (Linkage == GVA_Internal || Linkage == GVA_C99Inline || 5985 Linkage == GVA_CXXInline || Linkage == GVA_TemplateInstantiation) 5986 return false; 5987 return true; 5988 } 5989 5990 const VarDecl *VD = cast<VarDecl>(D); 5991 assert(VD->isFileVarDecl() && "Expected file scoped var"); 5992 5993 if (VD->isThisDeclarationADefinition() == VarDecl::DeclarationOnly) 5994 return false; 5995 5996 // Structs that have non-trivial constructors or destructors are required. 5997 5998 // FIXME: Handle references. 5999 if (const RecordType *RT = VD->getType()->getAs<RecordType>()) { 6000 if (const CXXRecordDecl *RD = dyn_cast<CXXRecordDecl>(RT->getDecl())) { 6001 if (RD->hasDefinition() && 6002 (!RD->hasTrivialConstructor() || !RD->hasTrivialDestructor())) 6003 return true; 6004 } 6005 } 6006 6007 GVALinkage L = GetGVALinkageForVariable(VD); 6008 if (L == GVA_Internal || L == GVA_TemplateInstantiation) { 6009 if (!(VD->getInit() && VD->getInit()->HasSideEffects(*this))) 6010 return false; 6011 } 6012 6013 return true; 6014} 6015 6016CallingConv ASTContext::getDefaultMethodCallConv() { 6017 // Pass through to the C++ ABI object 6018 return ABI->getDefaultMethodCallConv(); 6019} 6020 6021bool ASTContext::isNearlyEmpty(const CXXRecordDecl *RD) const { 6022 // Pass through to the C++ ABI object 6023 return ABI->isNearlyEmpty(RD); 6024} 6025 6026MangleContext *ASTContext::createMangleContext() { 6027 switch (Target.getCXXABI()) { 6028 case CXXABI_ARM: 6029 case CXXABI_Itanium: 6030 return createItaniumMangleContext(*this, getDiagnostics()); 6031 case CXXABI_Microsoft: 6032 return createMicrosoftMangleContext(*this, getDiagnostics()); 6033 } 6034 assert(0 && "Unsupported ABI"); 6035 return 0; 6036} 6037 6038CXXABI::~CXXABI() {} 6039