ASTContext.cpp revision 264ba48dc98f3f843935a485d5b086f7e0fdc4f1
15c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)//===--- ASTContext.cpp - Context to hold long-lived AST nodes ------------===// 25c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)// 35c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)// The LLVM Compiler Infrastructure 45c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)// 55c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)// This file is distributed under the University of Illinois Open Source 65c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)// License. See LICENSE.TXT for details. 75c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)// 85c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)//===----------------------------------------------------------------------===// 95c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)// 105c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)// This file implements the ASTContext interface. 115c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)// 125c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)//===----------------------------------------------------------------------===// 135c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 145c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#include "clang/AST/ASTContext.h" 155c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#include "clang/AST/CharUnits.h" 165c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#include "clang/AST/DeclCXX.h" 175c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#include "clang/AST/DeclObjC.h" 185c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#include "clang/AST/DeclTemplate.h" 195c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#include "clang/AST/TypeLoc.h" 205c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#include "clang/AST/Expr.h" 215c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#include "clang/AST/ExternalASTSource.h" 225c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#include "clang/AST/RecordLayout.h" 235c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#include "clang/Basic/Builtins.h" 245c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#include "clang/Basic/SourceManager.h" 255c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#include "clang/Basic/TargetInfo.h" 265c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#include "llvm/ADT/SmallString.h" 275c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#include "llvm/ADT/StringExtras.h" 285c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#include "llvm/Support/MathExtras.h" 295c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#include "llvm/Support/raw_ostream.h" 305c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#include "RecordLayoutBuilder.h" 315c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 325c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)using namespace clang; 335c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 3453e740f4a82e17f3ae59772501622dc354e42336Torne (Richard Coles)enum FloatingRank { 3553e740f4a82e17f3ae59772501622dc354e42336Torne (Richard Coles) FloatRank, DoubleRank, LongDoubleRank 3653e740f4a82e17f3ae59772501622dc354e42336Torne (Richard Coles)}; 3710f88d5669dbd969c059d61ba09fa37dd72ac559Ben Murdoch 38591b958dee2cf159d33a0b931e6231072eaf38d5Ben MurdochASTContext::ASTContext(const LangOptions& LOpts, SourceManager &SM, 39591b958dee2cf159d33a0b931e6231072eaf38d5Ben Murdoch const TargetInfo &t, 40591b958dee2cf159d33a0b931e6231072eaf38d5Ben Murdoch IdentifierTable &idents, SelectorTable &sels, 415c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) Builtin::Context &builtins, 42c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) bool FreeMem, unsigned size_reserve) : 435c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) GlobalNestedNameSpecifier(0), CFConstantStringTypeDecl(0), 445c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) ObjCFastEnumerationStateTypeDecl(0), FILEDecl(0), jmp_bufDecl(0), 455c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) sigjmp_bufDecl(0), BlockDescriptorType(0), BlockDescriptorExtendedType(0), 465c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) SourceMgr(SM), LangOpts(LOpts), FreeMemory(FreeMem), Target(t), 47f6b7aed3f7ce69aca0d7a032d144cbd088b04393Torne (Richard Coles) Idents(idents), Selectors(sels), 48f6b7aed3f7ce69aca0d7a032d144cbd088b04393Torne (Richard Coles) BuiltinInfo(builtins), ExternalSource(0), PrintingPolicy(LOpts), 49f6b7aed3f7ce69aca0d7a032d144cbd088b04393Torne (Richard Coles) LastSDM(0, 0) { 50f6b7aed3f7ce69aca0d7a032d144cbd088b04393Torne (Richard Coles) ObjCIdRedefinitionType = QualType(); 51f6b7aed3f7ce69aca0d7a032d144cbd088b04393Torne (Richard Coles) ObjCClassRedefinitionType = QualType(); 52f6b7aed3f7ce69aca0d7a032d144cbd088b04393Torne (Richard Coles) ObjCSelRedefinitionType = QualType(); 53f6b7aed3f7ce69aca0d7a032d144cbd088b04393Torne (Richard Coles) if (size_reserve > 0) Types.reserve(size_reserve); 545c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) TUDecl = TranslationUnitDecl::Create(*this); 55f6b7aed3f7ce69aca0d7a032d144cbd088b04393Torne (Richard Coles) InitBuiltinTypes(); 565c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 57f6b7aed3f7ce69aca0d7a032d144cbd088b04393Torne (Richard Coles) 58f6b7aed3f7ce69aca0d7a032d144cbd088b04393Torne (Richard Coles)ASTContext::~ASTContext() { 595c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // Release the DenseMaps associated with DeclContext objects. 605c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // FIXME: Is this the ideal solution? 615c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) ReleaseDeclContextMaps(); 62f6b7aed3f7ce69aca0d7a032d144cbd088b04393Torne (Richard Coles) 63f6b7aed3f7ce69aca0d7a032d144cbd088b04393Torne (Richard Coles) // Release all of the memory associated with overridden C++ methods. 64f6b7aed3f7ce69aca0d7a032d144cbd088b04393Torne (Richard Coles) for (llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::iterator 65f6b7aed3f7ce69aca0d7a032d144cbd088b04393Torne (Richard Coles) OM = OverriddenMethods.begin(), OMEnd = OverriddenMethods.end(); 66f6b7aed3f7ce69aca0d7a032d144cbd088b04393Torne (Richard Coles) OM != OMEnd; ++OM) 67f6b7aed3f7ce69aca0d7a032d144cbd088b04393Torne (Richard Coles) OM->second.Destroy(); 68f6b7aed3f7ce69aca0d7a032d144cbd088b04393Torne (Richard Coles) 695c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) if (FreeMemory) { 70f6b7aed3f7ce69aca0d7a032d144cbd088b04393Torne (Richard Coles) // Deallocate all the types. 715c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) while (!Types.empty()) { 725c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) Types.back()->Destroy(*this); 735c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) Types.pop_back(); 745c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) } 755c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 765c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) for (llvm::FoldingSet<ExtQuals>::iterator 77f6b7aed3f7ce69aca0d7a032d144cbd088b04393Torne (Richard Coles) I = ExtQualNodes.begin(), E = ExtQualNodes.end(); I != E; ) { 78f6b7aed3f7ce69aca0d7a032d144cbd088b04393Torne (Richard Coles) // Increment in loop to prevent using deallocated memory. 79f6b7aed3f7ce69aca0d7a032d144cbd088b04393Torne (Richard Coles) Deallocate(&*I++); 80f6b7aed3f7ce69aca0d7a032d144cbd088b04393Torne (Richard Coles) } 81f6b7aed3f7ce69aca0d7a032d144cbd088b04393Torne (Richard Coles) 82f6b7aed3f7ce69aca0d7a032d144cbd088b04393Torne (Richard Coles) for (llvm::DenseMap<const RecordDecl*, const ASTRecordLayout*>::iterator 83f6b7aed3f7ce69aca0d7a032d144cbd088b04393Torne (Richard Coles) I = ASTRecordLayouts.begin(), E = ASTRecordLayouts.end(); I != E; ) { 845c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // Increment in loop to prevent using deallocated memory. 85f6b7aed3f7ce69aca0d7a032d144cbd088b04393Torne (Richard Coles) if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 865c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) R->Destroy(*this); 87f6b7aed3f7ce69aca0d7a032d144cbd088b04393Torne (Richard Coles) } 885c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 895c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) for (llvm::DenseMap<const ObjCContainerDecl*, 9010f88d5669dbd969c059d61ba09fa37dd72ac559Ben Murdoch const ASTRecordLayout*>::iterator 915c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) I = ObjCLayouts.begin(), E = ObjCLayouts.end(); I != E; ) { 9210f88d5669dbd969c059d61ba09fa37dd72ac559Ben Murdoch // Increment in loop to prevent using deallocated memory. 935c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) if (ASTRecordLayout *R = const_cast<ASTRecordLayout*>((I++)->second)) 94f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) R->Destroy(*this); 955c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) } 96f6b7aed3f7ce69aca0d7a032d144cbd088b04393Torne (Richard Coles) } 975c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 98f6b7aed3f7ce69aca0d7a032d144cbd088b04393Torne (Richard Coles) // Destroy nested-name-specifiers. 99f6b7aed3f7ce69aca0d7a032d144cbd088b04393Torne (Richard Coles) for (llvm::FoldingSet<NestedNameSpecifier>::iterator 100f6b7aed3f7ce69aca0d7a032d144cbd088b04393Torne (Richard Coles) NNS = NestedNameSpecifiers.begin(), 101f6b7aed3f7ce69aca0d7a032d144cbd088b04393Torne (Richard Coles) NNSEnd = NestedNameSpecifiers.end(); 102f6b7aed3f7ce69aca0d7a032d144cbd088b04393Torne (Richard Coles) NNS != NNSEnd; ) { 103f6b7aed3f7ce69aca0d7a032d144cbd088b04393Torne (Richard Coles) // Increment in loop to prevent using deallocated memory. 104f6b7aed3f7ce69aca0d7a032d144cbd088b04393Torne (Richard Coles) (*NNS++).Destroy(*this); 105f6b7aed3f7ce69aca0d7a032d144cbd088b04393Torne (Richard Coles) } 106f6b7aed3f7ce69aca0d7a032d144cbd088b04393Torne (Richard Coles) 107f6b7aed3f7ce69aca0d7a032d144cbd088b04393Torne (Richard Coles) if (GlobalNestedNameSpecifier) 108f6b7aed3f7ce69aca0d7a032d144cbd088b04393Torne (Richard Coles) GlobalNestedNameSpecifier->Destroy(*this); 109f6b7aed3f7ce69aca0d7a032d144cbd088b04393Torne (Richard Coles) 1105c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) TUDecl->Destroy(*this); 1115c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 112f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles) 1135c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)void 1145c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)ASTContext::setExternalSource(llvm::OwningPtr<ExternalASTSource> &Source) { 115f6b7aed3f7ce69aca0d7a032d144cbd088b04393Torne (Richard Coles) ExternalSource.reset(Source.take()); 1165c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 1175c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 118f79f16f17ddc4f842d7b7a38603e280e94be826aTorne (Richard Coles)void ASTContext::PrintStats() const { 1195c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) fprintf(stderr, "*** AST Context Stats:\n"); 1205c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) fprintf(stderr, " %d types total.\n", (int)Types.size()); 121f6b7aed3f7ce69aca0d7a032d144cbd088b04393Torne (Richard Coles) 1225c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) unsigned counts[] = { 1235c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#define TYPE(Name, Parent) 0, 1245c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#define ABSTRACT_TYPE(Name, Parent) 125f6b7aed3f7ce69aca0d7a032d144cbd088b04393Torne (Richard Coles)#include "clang/AST/TypeNodes.def" 1265c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 0 // Extra 1275c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) }; 128c1847b1379d12d0e05df27436bf19a9b1bf12deaTorne (Richard Coles) 1295c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) for (unsigned i = 0, e = Types.size(); i != e; ++i) { 1305c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) Type *T = Types[i]; 131 counts[(unsigned)T->getTypeClass()]++; 132 } 133 134 unsigned Idx = 0; 135 unsigned TotalBytes = 0; 136#define TYPE(Name, Parent) \ 137 if (counts[Idx]) \ 138 fprintf(stderr, " %d %s types\n", (int)counts[Idx], #Name); \ 139 TotalBytes += counts[Idx] * sizeof(Name##Type); \ 140 ++Idx; 141#define ABSTRACT_TYPE(Name, Parent) 142#include "clang/AST/TypeNodes.def" 143 144 fprintf(stderr, "Total bytes = %d\n", int(TotalBytes)); 145 146 if (ExternalSource.get()) { 147 fprintf(stderr, "\n"); 148 ExternalSource->PrintStats(); 149 } 150} 151 152 153void ASTContext::InitBuiltinType(CanQualType &R, BuiltinType::Kind K) { 154 BuiltinType *Ty = new (*this, TypeAlignment) BuiltinType(K); 155 R = CanQualType::CreateUnsafe(QualType(Ty, 0)); 156 Types.push_back(Ty); 157} 158 159void ASTContext::InitBuiltinTypes() { 160 assert(VoidTy.isNull() && "Context reinitialized?"); 161 162 // C99 6.2.5p19. 163 InitBuiltinType(VoidTy, BuiltinType::Void); 164 165 // C99 6.2.5p2. 166 InitBuiltinType(BoolTy, BuiltinType::Bool); 167 // C99 6.2.5p3. 168 if (LangOpts.CharIsSigned) 169 InitBuiltinType(CharTy, BuiltinType::Char_S); 170 else 171 InitBuiltinType(CharTy, BuiltinType::Char_U); 172 // C99 6.2.5p4. 173 InitBuiltinType(SignedCharTy, BuiltinType::SChar); 174 InitBuiltinType(ShortTy, BuiltinType::Short); 175 InitBuiltinType(IntTy, BuiltinType::Int); 176 InitBuiltinType(LongTy, BuiltinType::Long); 177 InitBuiltinType(LongLongTy, BuiltinType::LongLong); 178 179 // C99 6.2.5p6. 180 InitBuiltinType(UnsignedCharTy, BuiltinType::UChar); 181 InitBuiltinType(UnsignedShortTy, BuiltinType::UShort); 182 InitBuiltinType(UnsignedIntTy, BuiltinType::UInt); 183 InitBuiltinType(UnsignedLongTy, BuiltinType::ULong); 184 InitBuiltinType(UnsignedLongLongTy, BuiltinType::ULongLong); 185 186 // C99 6.2.5p10. 187 InitBuiltinType(FloatTy, BuiltinType::Float); 188 InitBuiltinType(DoubleTy, BuiltinType::Double); 189 InitBuiltinType(LongDoubleTy, BuiltinType::LongDouble); 190 191 // GNU extension, 128-bit integers. 192 InitBuiltinType(Int128Ty, BuiltinType::Int128); 193 InitBuiltinType(UnsignedInt128Ty, BuiltinType::UInt128); 194 195 if (LangOpts.CPlusPlus) // C++ 3.9.1p5 196 InitBuiltinType(WCharTy, BuiltinType::WChar); 197 else // C99 198 WCharTy = getFromTargetType(Target.getWCharType()); 199 200 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 201 InitBuiltinType(Char16Ty, BuiltinType::Char16); 202 else // C99 203 Char16Ty = getFromTargetType(Target.getChar16Type()); 204 205 if (LangOpts.CPlusPlus) // C++0x 3.9.1p5, extension for C++ 206 InitBuiltinType(Char32Ty, BuiltinType::Char32); 207 else // C99 208 Char32Ty = getFromTargetType(Target.getChar32Type()); 209 210 // Placeholder type for functions. 211 InitBuiltinType(OverloadTy, BuiltinType::Overload); 212 213 // Placeholder type for type-dependent expressions whose type is 214 // completely unknown. No code should ever check a type against 215 // DependentTy and users should never see it; however, it is here to 216 // help diagnose failures to properly check for type-dependent 217 // expressions. 218 InitBuiltinType(DependentTy, BuiltinType::Dependent); 219 220 // Placeholder type for C++0x auto declarations whose real type has 221 // not yet been deduced. 222 InitBuiltinType(UndeducedAutoTy, BuiltinType::UndeducedAuto); 223 224 // C99 6.2.5p11. 225 FloatComplexTy = getComplexType(FloatTy); 226 DoubleComplexTy = getComplexType(DoubleTy); 227 LongDoubleComplexTy = getComplexType(LongDoubleTy); 228 229 BuiltinVaListType = QualType(); 230 231 // "Builtin" typedefs set by Sema::ActOnTranslationUnitScope(). 232 ObjCIdTypedefType = QualType(); 233 ObjCClassTypedefType = QualType(); 234 ObjCSelTypedefType = QualType(); 235 236 // Builtin types for 'id', 'Class', and 'SEL'. 237 InitBuiltinType(ObjCBuiltinIdTy, BuiltinType::ObjCId); 238 InitBuiltinType(ObjCBuiltinClassTy, BuiltinType::ObjCClass); 239 InitBuiltinType(ObjCBuiltinSelTy, BuiltinType::ObjCSel); 240 241 ObjCConstantStringType = QualType(); 242 243 // void * type 244 VoidPtrTy = getPointerType(VoidTy); 245 246 // nullptr type (C++0x 2.14.7) 247 InitBuiltinType(NullPtrTy, BuiltinType::NullPtr); 248} 249 250MemberSpecializationInfo * 251ASTContext::getInstantiatedFromStaticDataMember(const VarDecl *Var) { 252 assert(Var->isStaticDataMember() && "Not a static data member"); 253 llvm::DenseMap<const VarDecl *, MemberSpecializationInfo *>::iterator Pos 254 = InstantiatedFromStaticDataMember.find(Var); 255 if (Pos == InstantiatedFromStaticDataMember.end()) 256 return 0; 257 258 return Pos->second; 259} 260 261void 262ASTContext::setInstantiatedFromStaticDataMember(VarDecl *Inst, VarDecl *Tmpl, 263 TemplateSpecializationKind TSK) { 264 assert(Inst->isStaticDataMember() && "Not a static data member"); 265 assert(Tmpl->isStaticDataMember() && "Not a static data member"); 266 assert(!InstantiatedFromStaticDataMember[Inst] && 267 "Already noted what static data member was instantiated from"); 268 InstantiatedFromStaticDataMember[Inst] 269 = new (*this) MemberSpecializationInfo(Tmpl, TSK); 270} 271 272NamedDecl * 273ASTContext::getInstantiatedFromUsingDecl(UsingDecl *UUD) { 274 llvm::DenseMap<UsingDecl *, NamedDecl *>::const_iterator Pos 275 = InstantiatedFromUsingDecl.find(UUD); 276 if (Pos == InstantiatedFromUsingDecl.end()) 277 return 0; 278 279 return Pos->second; 280} 281 282void 283ASTContext::setInstantiatedFromUsingDecl(UsingDecl *Inst, NamedDecl *Pattern) { 284 assert((isa<UsingDecl>(Pattern) || 285 isa<UnresolvedUsingValueDecl>(Pattern) || 286 isa<UnresolvedUsingTypenameDecl>(Pattern)) && 287 "pattern decl is not a using decl"); 288 assert(!InstantiatedFromUsingDecl[Inst] && "pattern already exists"); 289 InstantiatedFromUsingDecl[Inst] = Pattern; 290} 291 292UsingShadowDecl * 293ASTContext::getInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst) { 294 llvm::DenseMap<UsingShadowDecl*, UsingShadowDecl*>::const_iterator Pos 295 = InstantiatedFromUsingShadowDecl.find(Inst); 296 if (Pos == InstantiatedFromUsingShadowDecl.end()) 297 return 0; 298 299 return Pos->second; 300} 301 302void 303ASTContext::setInstantiatedFromUsingShadowDecl(UsingShadowDecl *Inst, 304 UsingShadowDecl *Pattern) { 305 assert(!InstantiatedFromUsingShadowDecl[Inst] && "pattern already exists"); 306 InstantiatedFromUsingShadowDecl[Inst] = Pattern; 307} 308 309FieldDecl *ASTContext::getInstantiatedFromUnnamedFieldDecl(FieldDecl *Field) { 310 llvm::DenseMap<FieldDecl *, FieldDecl *>::iterator Pos 311 = InstantiatedFromUnnamedFieldDecl.find(Field); 312 if (Pos == InstantiatedFromUnnamedFieldDecl.end()) 313 return 0; 314 315 return Pos->second; 316} 317 318void ASTContext::setInstantiatedFromUnnamedFieldDecl(FieldDecl *Inst, 319 FieldDecl *Tmpl) { 320 assert(!Inst->getDeclName() && "Instantiated field decl is not unnamed"); 321 assert(!Tmpl->getDeclName() && "Template field decl is not unnamed"); 322 assert(!InstantiatedFromUnnamedFieldDecl[Inst] && 323 "Already noted what unnamed field was instantiated from"); 324 325 InstantiatedFromUnnamedFieldDecl[Inst] = Tmpl; 326} 327 328CXXMethodVector::iterator CXXMethodVector::begin() const { 329 if ((Storage & 0x01) == 0) 330 return reinterpret_cast<iterator>(&Storage); 331 332 vector_type *Vec = reinterpret_cast<vector_type *>(Storage & ~0x01); 333 return &Vec->front(); 334} 335 336CXXMethodVector::iterator CXXMethodVector::end() const { 337 if ((Storage & 0x01) == 0) { 338 if (Storage == 0) 339 return reinterpret_cast<iterator>(&Storage); 340 341 return reinterpret_cast<iterator>(&Storage) + 1; 342 } 343 344 vector_type *Vec = reinterpret_cast<vector_type *>(Storage & ~0x01); 345 return &Vec->front() + Vec->size(); 346} 347 348void CXXMethodVector::push_back(const CXXMethodDecl *Method) { 349 if (Storage == 0) { 350 // 0 -> 1 element. 351 Storage = reinterpret_cast<uintptr_t>(Method); 352 return; 353 } 354 355 vector_type *Vec; 356 if ((Storage & 0x01) == 0) { 357 // 1 -> 2 elements. Allocate a new vector and push the element into that 358 // vector. 359 Vec = new vector_type; 360 Vec->push_back(reinterpret_cast<const CXXMethodDecl *>(Storage)); 361 Storage = reinterpret_cast<uintptr_t>(Vec) | 0x01; 362 } else 363 Vec = reinterpret_cast<vector_type *>(Storage & ~0x01); 364 365 // Add the new method to the vector. 366 Vec->push_back(Method); 367} 368 369void CXXMethodVector::Destroy() { 370 if (Storage & 0x01) 371 delete reinterpret_cast<vector_type *>(Storage & ~0x01); 372 373 Storage = 0; 374} 375 376 377ASTContext::overridden_cxx_method_iterator 378ASTContext::overridden_methods_begin(const CXXMethodDecl *Method) const { 379 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 380 = OverriddenMethods.find(Method); 381 if (Pos == OverriddenMethods.end()) 382 return 0; 383 384 return Pos->second.begin(); 385} 386 387ASTContext::overridden_cxx_method_iterator 388ASTContext::overridden_methods_end(const CXXMethodDecl *Method) const { 389 llvm::DenseMap<const CXXMethodDecl *, CXXMethodVector>::const_iterator Pos 390 = OverriddenMethods.find(Method); 391 if (Pos == OverriddenMethods.end()) 392 return 0; 393 394 return Pos->second.end(); 395} 396 397void ASTContext::addOverriddenMethod(const CXXMethodDecl *Method, 398 const CXXMethodDecl *Overridden) { 399 OverriddenMethods[Method].push_back(Overridden); 400} 401 402namespace { 403 class BeforeInTranslationUnit 404 : std::binary_function<SourceRange, SourceRange, bool> { 405 SourceManager *SourceMgr; 406 407 public: 408 explicit BeforeInTranslationUnit(SourceManager *SM) : SourceMgr(SM) { } 409 410 bool operator()(SourceRange X, SourceRange Y) { 411 return SourceMgr->isBeforeInTranslationUnit(X.getBegin(), Y.getBegin()); 412 } 413 }; 414} 415 416//===----------------------------------------------------------------------===// 417// Type Sizing and Analysis 418//===----------------------------------------------------------------------===// 419 420/// getFloatTypeSemantics - Return the APFloat 'semantics' for the specified 421/// scalar floating point type. 422const llvm::fltSemantics &ASTContext::getFloatTypeSemantics(QualType T) const { 423 const BuiltinType *BT = T->getAs<BuiltinType>(); 424 assert(BT && "Not a floating point type!"); 425 switch (BT->getKind()) { 426 default: assert(0 && "Not a floating point type!"); 427 case BuiltinType::Float: return Target.getFloatFormat(); 428 case BuiltinType::Double: return Target.getDoubleFormat(); 429 case BuiltinType::LongDouble: return Target.getLongDoubleFormat(); 430 } 431} 432 433/// getDeclAlign - Return a conservative estimate of the alignment of the 434/// specified decl. Note that bitfields do not have a valid alignment, so 435/// this method will assert on them. 436/// If @p RefAsPointee, references are treated like their underlying type 437/// (for alignof), else they're treated like pointers (for CodeGen). 438CharUnits ASTContext::getDeclAlign(const Decl *D, bool RefAsPointee) { 439 unsigned Align = Target.getCharWidth(); 440 441 if (const AlignedAttr* AA = D->getAttr<AlignedAttr>()) 442 Align = std::max(Align, AA->getMaxAlignment()); 443 444 if (const ValueDecl *VD = dyn_cast<ValueDecl>(D)) { 445 QualType T = VD->getType(); 446 if (const ReferenceType* RT = T->getAs<ReferenceType>()) { 447 if (RefAsPointee) 448 T = RT->getPointeeType(); 449 else 450 T = getPointerType(RT->getPointeeType()); 451 } 452 if (!T->isIncompleteType() && !T->isFunctionType()) { 453 // Incomplete or function types default to 1. 454 while (isa<VariableArrayType>(T) || isa<IncompleteArrayType>(T)) 455 T = cast<ArrayType>(T)->getElementType(); 456 457 Align = std::max(Align, getPreferredTypeAlign(T.getTypePtr())); 458 } 459 if (const FieldDecl *FD = dyn_cast<FieldDecl>(VD)) { 460 // In the case of a field in a packed struct, we want the minimum 461 // of the alignment of the field and the alignment of the struct. 462 Align = std::min(Align, 463 getPreferredTypeAlign(FD->getParent()->getTypeForDecl())); 464 } 465 } 466 467 return CharUnits::fromQuantity(Align / Target.getCharWidth()); 468} 469 470/// getTypeSize - Return the size of the specified type, in bits. This method 471/// does not work on incomplete types. 472/// 473/// FIXME: Pointers into different addr spaces could have different sizes and 474/// alignment requirements: getPointerInfo should take an AddrSpace, this 475/// should take a QualType, &c. 476std::pair<uint64_t, unsigned> 477ASTContext::getTypeInfo(const Type *T) { 478 uint64_t Width=0; 479 unsigned Align=8; 480 switch (T->getTypeClass()) { 481#define TYPE(Class, Base) 482#define ABSTRACT_TYPE(Class, Base) 483#define NON_CANONICAL_TYPE(Class, Base) 484#define DEPENDENT_TYPE(Class, Base) case Type::Class: 485#include "clang/AST/TypeNodes.def" 486 assert(false && "Should not see dependent types"); 487 break; 488 489 case Type::FunctionNoProto: 490 case Type::FunctionProto: 491 // GCC extension: alignof(function) = 32 bits 492 Width = 0; 493 Align = 32; 494 break; 495 496 case Type::IncompleteArray: 497 case Type::VariableArray: 498 Width = 0; 499 Align = getTypeAlign(cast<ArrayType>(T)->getElementType()); 500 break; 501 502 case Type::ConstantArray: { 503 const ConstantArrayType *CAT = cast<ConstantArrayType>(T); 504 505 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(CAT->getElementType()); 506 Width = EltInfo.first*CAT->getSize().getZExtValue(); 507 Align = EltInfo.second; 508 break; 509 } 510 case Type::ExtVector: 511 case Type::Vector: { 512 const VectorType *VT = cast<VectorType>(T); 513 std::pair<uint64_t, unsigned> EltInfo = getTypeInfo(VT->getElementType()); 514 Width = EltInfo.first*VT->getNumElements(); 515 Align = Width; 516 // If the alignment is not a power of 2, round up to the next power of 2. 517 // This happens for non-power-of-2 length vectors. 518 if (VT->getNumElements() & (VT->getNumElements()-1)) { 519 Align = llvm::NextPowerOf2(Align); 520 Width = llvm::RoundUpToAlignment(Width, Align); 521 } 522 break; 523 } 524 525 case Type::Builtin: 526 switch (cast<BuiltinType>(T)->getKind()) { 527 default: assert(0 && "Unknown builtin type!"); 528 case BuiltinType::Void: 529 // GCC extension: alignof(void) = 8 bits. 530 Width = 0; 531 Align = 8; 532 break; 533 534 case BuiltinType::Bool: 535 Width = Target.getBoolWidth(); 536 Align = Target.getBoolAlign(); 537 break; 538 case BuiltinType::Char_S: 539 case BuiltinType::Char_U: 540 case BuiltinType::UChar: 541 case BuiltinType::SChar: 542 Width = Target.getCharWidth(); 543 Align = Target.getCharAlign(); 544 break; 545 case BuiltinType::WChar: 546 Width = Target.getWCharWidth(); 547 Align = Target.getWCharAlign(); 548 break; 549 case BuiltinType::Char16: 550 Width = Target.getChar16Width(); 551 Align = Target.getChar16Align(); 552 break; 553 case BuiltinType::Char32: 554 Width = Target.getChar32Width(); 555 Align = Target.getChar32Align(); 556 break; 557 case BuiltinType::UShort: 558 case BuiltinType::Short: 559 Width = Target.getShortWidth(); 560 Align = Target.getShortAlign(); 561 break; 562 case BuiltinType::UInt: 563 case BuiltinType::Int: 564 Width = Target.getIntWidth(); 565 Align = Target.getIntAlign(); 566 break; 567 case BuiltinType::ULong: 568 case BuiltinType::Long: 569 Width = Target.getLongWidth(); 570 Align = Target.getLongAlign(); 571 break; 572 case BuiltinType::ULongLong: 573 case BuiltinType::LongLong: 574 Width = Target.getLongLongWidth(); 575 Align = Target.getLongLongAlign(); 576 break; 577 case BuiltinType::Int128: 578 case BuiltinType::UInt128: 579 Width = 128; 580 Align = 128; // int128_t is 128-bit aligned on all targets. 581 break; 582 case BuiltinType::Float: 583 Width = Target.getFloatWidth(); 584 Align = Target.getFloatAlign(); 585 break; 586 case BuiltinType::Double: 587 Width = Target.getDoubleWidth(); 588 Align = Target.getDoubleAlign(); 589 break; 590 case BuiltinType::LongDouble: 591 Width = Target.getLongDoubleWidth(); 592 Align = Target.getLongDoubleAlign(); 593 break; 594 case BuiltinType::NullPtr: 595 Width = Target.getPointerWidth(0); // C++ 3.9.1p11: sizeof(nullptr_t) 596 Align = Target.getPointerAlign(0); // == sizeof(void*) 597 break; 598 } 599 break; 600 case Type::ObjCObjectPointer: 601 Width = Target.getPointerWidth(0); 602 Align = Target.getPointerAlign(0); 603 break; 604 case Type::BlockPointer: { 605 unsigned AS = cast<BlockPointerType>(T)->getPointeeType().getAddressSpace(); 606 Width = Target.getPointerWidth(AS); 607 Align = Target.getPointerAlign(AS); 608 break; 609 } 610 case Type::LValueReference: 611 case Type::RValueReference: { 612 // alignof and sizeof should never enter this code path here, so we go 613 // the pointer route. 614 unsigned AS = cast<ReferenceType>(T)->getPointeeType().getAddressSpace(); 615 Width = Target.getPointerWidth(AS); 616 Align = Target.getPointerAlign(AS); 617 break; 618 } 619 case Type::Pointer: { 620 unsigned AS = cast<PointerType>(T)->getPointeeType().getAddressSpace(); 621 Width = Target.getPointerWidth(AS); 622 Align = Target.getPointerAlign(AS); 623 break; 624 } 625 case Type::MemberPointer: { 626 QualType Pointee = cast<MemberPointerType>(T)->getPointeeType(); 627 std::pair<uint64_t, unsigned> PtrDiffInfo = 628 getTypeInfo(getPointerDiffType()); 629 Width = PtrDiffInfo.first; 630 if (Pointee->isFunctionType()) 631 Width *= 2; 632 Align = PtrDiffInfo.second; 633 break; 634 } 635 case Type::Complex: { 636 // Complex types have the same alignment as their elements, but twice the 637 // size. 638 std::pair<uint64_t, unsigned> EltInfo = 639 getTypeInfo(cast<ComplexType>(T)->getElementType()); 640 Width = EltInfo.first*2; 641 Align = EltInfo.second; 642 break; 643 } 644 case Type::ObjCInterface: { 645 const ObjCInterfaceType *ObjCI = cast<ObjCInterfaceType>(T); 646 const ASTRecordLayout &Layout = getASTObjCInterfaceLayout(ObjCI->getDecl()); 647 Width = Layout.getSize(); 648 Align = Layout.getAlignment(); 649 break; 650 } 651 case Type::Record: 652 case Type::Enum: { 653 const TagType *TT = cast<TagType>(T); 654 655 if (TT->getDecl()->isInvalidDecl()) { 656 Width = 1; 657 Align = 1; 658 break; 659 } 660 661 if (const EnumType *ET = dyn_cast<EnumType>(TT)) 662 return getTypeInfo(ET->getDecl()->getIntegerType()); 663 664 const RecordType *RT = cast<RecordType>(TT); 665 const ASTRecordLayout &Layout = getASTRecordLayout(RT->getDecl()); 666 Width = Layout.getSize(); 667 Align = Layout.getAlignment(); 668 break; 669 } 670 671 case Type::SubstTemplateTypeParm: 672 return getTypeInfo(cast<SubstTemplateTypeParmType>(T)-> 673 getReplacementType().getTypePtr()); 674 675 case Type::Elaborated: 676 return getTypeInfo(cast<ElaboratedType>(T)->getUnderlyingType() 677 .getTypePtr()); 678 679 case Type::Typedef: { 680 const TypedefDecl *Typedef = cast<TypedefType>(T)->getDecl(); 681 if (const AlignedAttr *Aligned = Typedef->getAttr<AlignedAttr>()) { 682 Align = std::max(Aligned->getMaxAlignment(), 683 getTypeAlign(Typedef->getUnderlyingType().getTypePtr())); 684 Width = getTypeSize(Typedef->getUnderlyingType().getTypePtr()); 685 } else 686 return getTypeInfo(Typedef->getUnderlyingType().getTypePtr()); 687 break; 688 } 689 690 case Type::TypeOfExpr: 691 return getTypeInfo(cast<TypeOfExprType>(T)->getUnderlyingExpr()->getType() 692 .getTypePtr()); 693 694 case Type::TypeOf: 695 return getTypeInfo(cast<TypeOfType>(T)->getUnderlyingType().getTypePtr()); 696 697 case Type::Decltype: 698 return getTypeInfo(cast<DecltypeType>(T)->getUnderlyingExpr()->getType() 699 .getTypePtr()); 700 701 case Type::QualifiedName: 702 return getTypeInfo(cast<QualifiedNameType>(T)->getNamedType().getTypePtr()); 703 704 case Type::InjectedClassName: 705 return getTypeInfo(cast<InjectedClassNameType>(T) 706 ->getUnderlyingType().getTypePtr()); 707 708 case Type::TemplateSpecialization: 709 assert(getCanonicalType(T) != T && 710 "Cannot request the size of a dependent type"); 711 // FIXME: this is likely to be wrong once we support template 712 // aliases, since a template alias could refer to a typedef that 713 // has an __aligned__ attribute on it. 714 return getTypeInfo(getCanonicalType(T)); 715 } 716 717 assert(Align && (Align & (Align-1)) == 0 && "Alignment must be power of 2"); 718 return std::make_pair(Width, Align); 719} 720 721/// getTypeSizeInChars - Return the size of the specified type, in characters. 722/// This method does not work on incomplete types. 723CharUnits ASTContext::getTypeSizeInChars(QualType T) { 724 return CharUnits::fromQuantity(getTypeSize(T) / getCharWidth()); 725} 726CharUnits ASTContext::getTypeSizeInChars(const Type *T) { 727 return CharUnits::fromQuantity(getTypeSize(T) / getCharWidth()); 728} 729 730/// getTypeAlignInChars - Return the ABI-specified alignment of a type, in 731/// characters. This method does not work on incomplete types. 732CharUnits ASTContext::getTypeAlignInChars(QualType T) { 733 return CharUnits::fromQuantity(getTypeAlign(T) / getCharWidth()); 734} 735CharUnits ASTContext::getTypeAlignInChars(const Type *T) { 736 return CharUnits::fromQuantity(getTypeAlign(T) / getCharWidth()); 737} 738 739/// getPreferredTypeAlign - Return the "preferred" alignment of the specified 740/// type for the current target in bits. This can be different than the ABI 741/// alignment in cases where it is beneficial for performance to overalign 742/// a data type. 743unsigned ASTContext::getPreferredTypeAlign(const Type *T) { 744 unsigned ABIAlign = getTypeAlign(T); 745 746 // Double and long long should be naturally aligned if possible. 747 if (const ComplexType* CT = T->getAs<ComplexType>()) 748 T = CT->getElementType().getTypePtr(); 749 if (T->isSpecificBuiltinType(BuiltinType::Double) || 750 T->isSpecificBuiltinType(BuiltinType::LongLong)) 751 return std::max(ABIAlign, (unsigned)getTypeSize(T)); 752 753 return ABIAlign; 754} 755 756static void CollectLocalObjCIvars(ASTContext *Ctx, 757 const ObjCInterfaceDecl *OI, 758 llvm::SmallVectorImpl<FieldDecl*> &Fields) { 759 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 760 E = OI->ivar_end(); I != E; ++I) { 761 ObjCIvarDecl *IVDecl = *I; 762 if (!IVDecl->isInvalidDecl()) 763 Fields.push_back(cast<FieldDecl>(IVDecl)); 764 } 765} 766 767void ASTContext::CollectObjCIvars(const ObjCInterfaceDecl *OI, 768 llvm::SmallVectorImpl<FieldDecl*> &Fields) { 769 if (const ObjCInterfaceDecl *SuperClass = OI->getSuperClass()) 770 CollectObjCIvars(SuperClass, Fields); 771 CollectLocalObjCIvars(this, OI, Fields); 772} 773 774/// ShallowCollectObjCIvars - 775/// Collect all ivars, including those synthesized, in the current class. 776/// 777void ASTContext::ShallowCollectObjCIvars(const ObjCInterfaceDecl *OI, 778 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 779 for (ObjCInterfaceDecl::ivar_iterator I = OI->ivar_begin(), 780 E = OI->ivar_end(); I != E; ++I) { 781 Ivars.push_back(*I); 782 } 783 784 CollectNonClassIvars(OI, Ivars); 785} 786 787/// CollectNonClassIvars - 788/// This routine collects all other ivars which are not declared in the class. 789/// This includes synthesized ivars (via @synthesize) and those in 790// class's @implementation. 791/// 792void ASTContext::CollectNonClassIvars(const ObjCInterfaceDecl *OI, 793 llvm::SmallVectorImpl<ObjCIvarDecl*> &Ivars) { 794 // Find ivars declared in class extension. 795 if (const ObjCCategoryDecl *CDecl = OI->getClassExtension()) { 796 for (ObjCCategoryDecl::ivar_iterator I = CDecl->ivar_begin(), 797 E = CDecl->ivar_end(); I != E; ++I) { 798 Ivars.push_back(*I); 799 } 800 } 801 802 // Also add any ivar defined in this class's implementation. This 803 // includes synthesized ivars. 804 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) { 805 for (ObjCImplementationDecl::ivar_iterator I = ImplDecl->ivar_begin(), 806 E = ImplDecl->ivar_end(); I != E; ++I) 807 Ivars.push_back(*I); 808 } 809} 810 811/// CollectInheritedProtocols - Collect all protocols in current class and 812/// those inherited by it. 813void ASTContext::CollectInheritedProtocols(const Decl *CDecl, 814 llvm::SmallPtrSet<ObjCProtocolDecl*, 8> &Protocols) { 815 if (const ObjCInterfaceDecl *OI = dyn_cast<ObjCInterfaceDecl>(CDecl)) { 816 for (ObjCInterfaceDecl::protocol_iterator P = OI->protocol_begin(), 817 PE = OI->protocol_end(); P != PE; ++P) { 818 ObjCProtocolDecl *Proto = (*P); 819 Protocols.insert(Proto); 820 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 821 PE = Proto->protocol_end(); P != PE; ++P) { 822 Protocols.insert(*P); 823 CollectInheritedProtocols(*P, Protocols); 824 } 825 } 826 827 // Categories of this Interface. 828 for (const ObjCCategoryDecl *CDeclChain = OI->getCategoryList(); 829 CDeclChain; CDeclChain = CDeclChain->getNextClassCategory()) 830 CollectInheritedProtocols(CDeclChain, Protocols); 831 if (ObjCInterfaceDecl *SD = OI->getSuperClass()) 832 while (SD) { 833 CollectInheritedProtocols(SD, Protocols); 834 SD = SD->getSuperClass(); 835 } 836 return; 837 } 838 if (const ObjCCategoryDecl *OC = dyn_cast<ObjCCategoryDecl>(CDecl)) { 839 for (ObjCInterfaceDecl::protocol_iterator P = OC->protocol_begin(), 840 PE = OC->protocol_end(); P != PE; ++P) { 841 ObjCProtocolDecl *Proto = (*P); 842 Protocols.insert(Proto); 843 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 844 PE = Proto->protocol_end(); P != PE; ++P) 845 CollectInheritedProtocols(*P, Protocols); 846 } 847 return; 848 } 849 if (const ObjCProtocolDecl *OP = dyn_cast<ObjCProtocolDecl>(CDecl)) { 850 for (ObjCProtocolDecl::protocol_iterator P = OP->protocol_begin(), 851 PE = OP->protocol_end(); P != PE; ++P) { 852 ObjCProtocolDecl *Proto = (*P); 853 Protocols.insert(Proto); 854 for (ObjCProtocolDecl::protocol_iterator P = Proto->protocol_begin(), 855 PE = Proto->protocol_end(); P != PE; ++P) 856 CollectInheritedProtocols(*P, Protocols); 857 } 858 return; 859 } 860} 861 862unsigned ASTContext::CountNonClassIvars(const ObjCInterfaceDecl *OI) { 863 unsigned count = 0; 864 // Count ivars declared in class extension. 865 if (const ObjCCategoryDecl *CDecl = OI->getClassExtension()) { 866 for (ObjCCategoryDecl::ivar_iterator I = CDecl->ivar_begin(), 867 E = CDecl->ivar_end(); I != E; ++I) { 868 ++count; 869 } 870 } 871 872 // Count ivar defined in this class's implementation. This 873 // includes synthesized ivars. 874 if (ObjCImplementationDecl *ImplDecl = OI->getImplementation()) 875 for (ObjCImplementationDecl::ivar_iterator I = ImplDecl->ivar_begin(), 876 E = ImplDecl->ivar_end(); I != E; ++I) 877 ++count; 878 return count; 879} 880 881/// \brief Get the implementation of ObjCInterfaceDecl,or NULL if none exists. 882ObjCImplementationDecl *ASTContext::getObjCImplementation(ObjCInterfaceDecl *D) { 883 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 884 I = ObjCImpls.find(D); 885 if (I != ObjCImpls.end()) 886 return cast<ObjCImplementationDecl>(I->second); 887 return 0; 888} 889/// \brief Get the implementation of ObjCCategoryDecl, or NULL if none exists. 890ObjCCategoryImplDecl *ASTContext::getObjCImplementation(ObjCCategoryDecl *D) { 891 llvm::DenseMap<ObjCContainerDecl*, ObjCImplDecl*>::iterator 892 I = ObjCImpls.find(D); 893 if (I != ObjCImpls.end()) 894 return cast<ObjCCategoryImplDecl>(I->second); 895 return 0; 896} 897 898/// \brief Set the implementation of ObjCInterfaceDecl. 899void ASTContext::setObjCImplementation(ObjCInterfaceDecl *IFaceD, 900 ObjCImplementationDecl *ImplD) { 901 assert(IFaceD && ImplD && "Passed null params"); 902 ObjCImpls[IFaceD] = ImplD; 903} 904/// \brief Set the implementation of ObjCCategoryDecl. 905void ASTContext::setObjCImplementation(ObjCCategoryDecl *CatD, 906 ObjCCategoryImplDecl *ImplD) { 907 assert(CatD && ImplD && "Passed null params"); 908 ObjCImpls[CatD] = ImplD; 909} 910 911/// \brief Allocate an uninitialized TypeSourceInfo. 912/// 913/// The caller should initialize the memory held by TypeSourceInfo using 914/// the TypeLoc wrappers. 915/// 916/// \param T the type that will be the basis for type source info. This type 917/// should refer to how the declarator was written in source code, not to 918/// what type semantic analysis resolved the declarator to. 919TypeSourceInfo *ASTContext::CreateTypeSourceInfo(QualType T, 920 unsigned DataSize) { 921 if (!DataSize) 922 DataSize = TypeLoc::getFullDataSizeForType(T); 923 else 924 assert(DataSize == TypeLoc::getFullDataSizeForType(T) && 925 "incorrect data size provided to CreateTypeSourceInfo!"); 926 927 TypeSourceInfo *TInfo = 928 (TypeSourceInfo*)BumpAlloc.Allocate(sizeof(TypeSourceInfo) + DataSize, 8); 929 new (TInfo) TypeSourceInfo(T); 930 return TInfo; 931} 932 933TypeSourceInfo *ASTContext::getTrivialTypeSourceInfo(QualType T, 934 SourceLocation L) { 935 TypeSourceInfo *DI = CreateTypeSourceInfo(T); 936 DI->getTypeLoc().initialize(L); 937 return DI; 938} 939 940/// getInterfaceLayoutImpl - Get or compute information about the 941/// layout of the given interface. 942/// 943/// \param Impl - If given, also include the layout of the interface's 944/// implementation. This may differ by including synthesized ivars. 945const ASTRecordLayout & 946ASTContext::getObjCLayout(const ObjCInterfaceDecl *D, 947 const ObjCImplementationDecl *Impl) { 948 assert(!D->isForwardDecl() && "Invalid interface decl!"); 949 950 // Look up this layout, if already laid out, return what we have. 951 ObjCContainerDecl *Key = 952 Impl ? (ObjCContainerDecl*) Impl : (ObjCContainerDecl*) D; 953 if (const ASTRecordLayout *Entry = ObjCLayouts[Key]) 954 return *Entry; 955 956 // Add in synthesized ivar count if laying out an implementation. 957 if (Impl) { 958 unsigned SynthCount = CountNonClassIvars(D); 959 // If there aren't any sythesized ivars then reuse the interface 960 // entry. Note we can't cache this because we simply free all 961 // entries later; however we shouldn't look up implementations 962 // frequently. 963 if (SynthCount == 0) 964 return getObjCLayout(D, 0); 965 } 966 967 const ASTRecordLayout *NewEntry = 968 ASTRecordLayoutBuilder::ComputeLayout(*this, D, Impl); 969 ObjCLayouts[Key] = NewEntry; 970 971 return *NewEntry; 972} 973 974const ASTRecordLayout & 975ASTContext::getASTObjCInterfaceLayout(const ObjCInterfaceDecl *D) { 976 return getObjCLayout(D, 0); 977} 978 979const ASTRecordLayout & 980ASTContext::getASTObjCImplementationLayout(const ObjCImplementationDecl *D) { 981 return getObjCLayout(D->getClassInterface(), D); 982} 983 984/// getASTRecordLayout - Get or compute information about the layout of the 985/// specified record (struct/union/class), which indicates its size and field 986/// position information. 987const ASTRecordLayout &ASTContext::getASTRecordLayout(const RecordDecl *D) { 988 D = D->getDefinition(); 989 assert(D && "Cannot get layout of forward declarations!"); 990 991 // Look up this layout, if already laid out, return what we have. 992 // Note that we can't save a reference to the entry because this function 993 // is recursive. 994 const ASTRecordLayout *Entry = ASTRecordLayouts[D]; 995 if (Entry) return *Entry; 996 997 const ASTRecordLayout *NewEntry = 998 ASTRecordLayoutBuilder::ComputeLayout(*this, D); 999 ASTRecordLayouts[D] = NewEntry; 1000 1001 return *NewEntry; 1002} 1003 1004const CXXMethodDecl *ASTContext::getKeyFunction(const CXXRecordDecl *RD) { 1005 RD = cast<CXXRecordDecl>(RD->getDefinition()); 1006 assert(RD && "Cannot get key function for forward declarations!"); 1007 1008 const CXXMethodDecl *&Entry = KeyFunctions[RD]; 1009 if (!Entry) 1010 Entry = ASTRecordLayoutBuilder::ComputeKeyFunction(RD); 1011 else 1012 assert(Entry == ASTRecordLayoutBuilder::ComputeKeyFunction(RD) && 1013 "Key function changed!"); 1014 1015 return Entry; 1016} 1017 1018//===----------------------------------------------------------------------===// 1019// Type creation/memoization methods 1020//===----------------------------------------------------------------------===// 1021 1022QualType ASTContext::getExtQualType(const Type *TypeNode, Qualifiers Quals) { 1023 unsigned Fast = Quals.getFastQualifiers(); 1024 Quals.removeFastQualifiers(); 1025 1026 // Check if we've already instantiated this type. 1027 llvm::FoldingSetNodeID ID; 1028 ExtQuals::Profile(ID, TypeNode, Quals); 1029 void *InsertPos = 0; 1030 if (ExtQuals *EQ = ExtQualNodes.FindNodeOrInsertPos(ID, InsertPos)) { 1031 assert(EQ->getQualifiers() == Quals); 1032 QualType T = QualType(EQ, Fast); 1033 return T; 1034 } 1035 1036 ExtQuals *New = new (*this, TypeAlignment) ExtQuals(*this, TypeNode, Quals); 1037 ExtQualNodes.InsertNode(New, InsertPos); 1038 QualType T = QualType(New, Fast); 1039 return T; 1040} 1041 1042QualType ASTContext::getVolatileType(QualType T) { 1043 QualType CanT = getCanonicalType(T); 1044 if (CanT.isVolatileQualified()) return T; 1045 1046 QualifierCollector Quals; 1047 const Type *TypeNode = Quals.strip(T); 1048 Quals.addVolatile(); 1049 1050 return getExtQualType(TypeNode, Quals); 1051} 1052 1053QualType ASTContext::getAddrSpaceQualType(QualType T, unsigned AddressSpace) { 1054 QualType CanT = getCanonicalType(T); 1055 if (CanT.getAddressSpace() == AddressSpace) 1056 return T; 1057 1058 // If we are composing extended qualifiers together, merge together 1059 // into one ExtQuals node. 1060 QualifierCollector Quals; 1061 const Type *TypeNode = Quals.strip(T); 1062 1063 // If this type already has an address space specified, it cannot get 1064 // another one. 1065 assert(!Quals.hasAddressSpace() && 1066 "Type cannot be in multiple addr spaces!"); 1067 Quals.addAddressSpace(AddressSpace); 1068 1069 return getExtQualType(TypeNode, Quals); 1070} 1071 1072QualType ASTContext::getObjCGCQualType(QualType T, 1073 Qualifiers::GC GCAttr) { 1074 QualType CanT = getCanonicalType(T); 1075 if (CanT.getObjCGCAttr() == GCAttr) 1076 return T; 1077 1078 if (T->isPointerType()) { 1079 QualType Pointee = T->getAs<PointerType>()->getPointeeType(); 1080 if (Pointee->isAnyPointerType()) { 1081 QualType ResultType = getObjCGCQualType(Pointee, GCAttr); 1082 return getPointerType(ResultType); 1083 } 1084 } 1085 1086 // If we are composing extended qualifiers together, merge together 1087 // into one ExtQuals node. 1088 QualifierCollector Quals; 1089 const Type *TypeNode = Quals.strip(T); 1090 1091 // If this type already has an ObjCGC specified, it cannot get 1092 // another one. 1093 assert(!Quals.hasObjCGCAttr() && 1094 "Type cannot have multiple ObjCGCs!"); 1095 Quals.addObjCGCAttr(GCAttr); 1096 1097 return getExtQualType(TypeNode, Quals); 1098} 1099 1100static QualType getExtFunctionType(ASTContext& Context, QualType T, 1101 const FunctionType::ExtInfo &Info) { 1102 QualType ResultType; 1103 if (const PointerType *Pointer = T->getAs<PointerType>()) { 1104 QualType Pointee = Pointer->getPointeeType(); 1105 ResultType = getExtFunctionType(Context, Pointee, Info); 1106 if (ResultType == Pointee) 1107 return T; 1108 1109 ResultType = Context.getPointerType(ResultType); 1110 } else if (const BlockPointerType *BlockPointer 1111 = T->getAs<BlockPointerType>()) { 1112 QualType Pointee = BlockPointer->getPointeeType(); 1113 ResultType = getExtFunctionType(Context, Pointee, Info); 1114 if (ResultType == Pointee) 1115 return T; 1116 1117 ResultType = Context.getBlockPointerType(ResultType); 1118 } else if (const FunctionType *F = T->getAs<FunctionType>()) { 1119 if (F->getExtInfo() == Info) 1120 return T; 1121 1122 if (const FunctionNoProtoType *FNPT = dyn_cast<FunctionNoProtoType>(F)) { 1123 ResultType = Context.getFunctionNoProtoType(FNPT->getResultType(), 1124 Info); 1125 } else { 1126 const FunctionProtoType *FPT = cast<FunctionProtoType>(F); 1127 ResultType 1128 = Context.getFunctionType(FPT->getResultType(), FPT->arg_type_begin(), 1129 FPT->getNumArgs(), FPT->isVariadic(), 1130 FPT->getTypeQuals(), 1131 FPT->hasExceptionSpec(), 1132 FPT->hasAnyExceptionSpec(), 1133 FPT->getNumExceptions(), 1134 FPT->exception_begin(), 1135 Info); 1136 } 1137 } else 1138 return T; 1139 1140 return Context.getQualifiedType(ResultType, T.getLocalQualifiers()); 1141} 1142 1143QualType ASTContext::getNoReturnType(QualType T, bool AddNoReturn) { 1144 FunctionType::ExtInfo Info = getFunctionExtInfo(*T); 1145 return getExtFunctionType(*this, T, 1146 Info.withNoReturn(AddNoReturn)); 1147} 1148 1149QualType ASTContext::getCallConvType(QualType T, CallingConv CallConv) { 1150 FunctionType::ExtInfo Info = getFunctionExtInfo(*T); 1151 return getExtFunctionType(*this, T, 1152 Info.withCallingConv(CallConv)); 1153} 1154 1155/// getComplexType - Return the uniqued reference to the type for a complex 1156/// number with the specified element type. 1157QualType ASTContext::getComplexType(QualType T) { 1158 // Unique pointers, to guarantee there is only one pointer of a particular 1159 // structure. 1160 llvm::FoldingSetNodeID ID; 1161 ComplexType::Profile(ID, T); 1162 1163 void *InsertPos = 0; 1164 if (ComplexType *CT = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos)) 1165 return QualType(CT, 0); 1166 1167 // If the pointee type isn't canonical, this won't be a canonical type either, 1168 // so fill in the canonical type field. 1169 QualType Canonical; 1170 if (!T.isCanonical()) { 1171 Canonical = getComplexType(getCanonicalType(T)); 1172 1173 // Get the new insert position for the node we care about. 1174 ComplexType *NewIP = ComplexTypes.FindNodeOrInsertPos(ID, InsertPos); 1175 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1176 } 1177 ComplexType *New = new (*this, TypeAlignment) ComplexType(T, Canonical); 1178 Types.push_back(New); 1179 ComplexTypes.InsertNode(New, InsertPos); 1180 return QualType(New, 0); 1181} 1182 1183/// getPointerType - Return the uniqued reference to the type for a pointer to 1184/// the specified type. 1185QualType ASTContext::getPointerType(QualType T) { 1186 // Unique pointers, to guarantee there is only one pointer of a particular 1187 // structure. 1188 llvm::FoldingSetNodeID ID; 1189 PointerType::Profile(ID, T); 1190 1191 void *InsertPos = 0; 1192 if (PointerType *PT = PointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1193 return QualType(PT, 0); 1194 1195 // If the pointee type isn't canonical, this won't be a canonical type either, 1196 // so fill in the canonical type field. 1197 QualType Canonical; 1198 if (!T.isCanonical()) { 1199 Canonical = getPointerType(getCanonicalType(T)); 1200 1201 // Get the new insert position for the node we care about. 1202 PointerType *NewIP = PointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1203 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1204 } 1205 PointerType *New = new (*this, TypeAlignment) PointerType(T, Canonical); 1206 Types.push_back(New); 1207 PointerTypes.InsertNode(New, InsertPos); 1208 return QualType(New, 0); 1209} 1210 1211/// getBlockPointerType - Return the uniqued reference to the type for 1212/// a pointer to the specified block. 1213QualType ASTContext::getBlockPointerType(QualType T) { 1214 assert(T->isFunctionType() && "block of function types only"); 1215 // Unique pointers, to guarantee there is only one block of a particular 1216 // structure. 1217 llvm::FoldingSetNodeID ID; 1218 BlockPointerType::Profile(ID, T); 1219 1220 void *InsertPos = 0; 1221 if (BlockPointerType *PT = 1222 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1223 return QualType(PT, 0); 1224 1225 // If the block pointee type isn't canonical, this won't be a canonical 1226 // type either so fill in the canonical type field. 1227 QualType Canonical; 1228 if (!T.isCanonical()) { 1229 Canonical = getBlockPointerType(getCanonicalType(T)); 1230 1231 // Get the new insert position for the node we care about. 1232 BlockPointerType *NewIP = 1233 BlockPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1234 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1235 } 1236 BlockPointerType *New 1237 = new (*this, TypeAlignment) BlockPointerType(T, Canonical); 1238 Types.push_back(New); 1239 BlockPointerTypes.InsertNode(New, InsertPos); 1240 return QualType(New, 0); 1241} 1242 1243/// getLValueReferenceType - Return the uniqued reference to the type for an 1244/// lvalue reference to the specified type. 1245QualType ASTContext::getLValueReferenceType(QualType T, bool SpelledAsLValue) { 1246 // Unique pointers, to guarantee there is only one pointer of a particular 1247 // structure. 1248 llvm::FoldingSetNodeID ID; 1249 ReferenceType::Profile(ID, T, SpelledAsLValue); 1250 1251 void *InsertPos = 0; 1252 if (LValueReferenceType *RT = 1253 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1254 return QualType(RT, 0); 1255 1256 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1257 1258 // If the referencee type isn't canonical, this won't be a canonical type 1259 // either, so fill in the canonical type field. 1260 QualType Canonical; 1261 if (!SpelledAsLValue || InnerRef || !T.isCanonical()) { 1262 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1263 Canonical = getLValueReferenceType(getCanonicalType(PointeeType)); 1264 1265 // Get the new insert position for the node we care about. 1266 LValueReferenceType *NewIP = 1267 LValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1268 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1269 } 1270 1271 LValueReferenceType *New 1272 = new (*this, TypeAlignment) LValueReferenceType(T, Canonical, 1273 SpelledAsLValue); 1274 Types.push_back(New); 1275 LValueReferenceTypes.InsertNode(New, InsertPos); 1276 1277 return QualType(New, 0); 1278} 1279 1280/// getRValueReferenceType - Return the uniqued reference to the type for an 1281/// rvalue reference to the specified type. 1282QualType ASTContext::getRValueReferenceType(QualType T) { 1283 // Unique pointers, to guarantee there is only one pointer of a particular 1284 // structure. 1285 llvm::FoldingSetNodeID ID; 1286 ReferenceType::Profile(ID, T, false); 1287 1288 void *InsertPos = 0; 1289 if (RValueReferenceType *RT = 1290 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos)) 1291 return QualType(RT, 0); 1292 1293 const ReferenceType *InnerRef = T->getAs<ReferenceType>(); 1294 1295 // If the referencee type isn't canonical, this won't be a canonical type 1296 // either, so fill in the canonical type field. 1297 QualType Canonical; 1298 if (InnerRef || !T.isCanonical()) { 1299 QualType PointeeType = (InnerRef ? InnerRef->getPointeeType() : T); 1300 Canonical = getRValueReferenceType(getCanonicalType(PointeeType)); 1301 1302 // Get the new insert position for the node we care about. 1303 RValueReferenceType *NewIP = 1304 RValueReferenceTypes.FindNodeOrInsertPos(ID, InsertPos); 1305 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1306 } 1307 1308 RValueReferenceType *New 1309 = new (*this, TypeAlignment) RValueReferenceType(T, Canonical); 1310 Types.push_back(New); 1311 RValueReferenceTypes.InsertNode(New, InsertPos); 1312 return QualType(New, 0); 1313} 1314 1315/// getMemberPointerType - Return the uniqued reference to the type for a 1316/// member pointer to the specified type, in the specified class. 1317QualType ASTContext::getMemberPointerType(QualType T, const Type *Cls) { 1318 // Unique pointers, to guarantee there is only one pointer of a particular 1319 // structure. 1320 llvm::FoldingSetNodeID ID; 1321 MemberPointerType::Profile(ID, T, Cls); 1322 1323 void *InsertPos = 0; 1324 if (MemberPointerType *PT = 1325 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 1326 return QualType(PT, 0); 1327 1328 // If the pointee or class type isn't canonical, this won't be a canonical 1329 // type either, so fill in the canonical type field. 1330 QualType Canonical; 1331 if (!T.isCanonical() || !Cls->isCanonicalUnqualified()) { 1332 Canonical = getMemberPointerType(getCanonicalType(T),getCanonicalType(Cls)); 1333 1334 // Get the new insert position for the node we care about. 1335 MemberPointerType *NewIP = 1336 MemberPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 1337 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1338 } 1339 MemberPointerType *New 1340 = new (*this, TypeAlignment) MemberPointerType(T, Cls, Canonical); 1341 Types.push_back(New); 1342 MemberPointerTypes.InsertNode(New, InsertPos); 1343 return QualType(New, 0); 1344} 1345 1346/// getConstantArrayType - Return the unique reference to the type for an 1347/// array of the specified element type. 1348QualType ASTContext::getConstantArrayType(QualType EltTy, 1349 const llvm::APInt &ArySizeIn, 1350 ArrayType::ArraySizeModifier ASM, 1351 unsigned EltTypeQuals) { 1352 assert((EltTy->isDependentType() || 1353 EltTy->isIncompleteType() || EltTy->isConstantSizeType()) && 1354 "Constant array of VLAs is illegal!"); 1355 1356 // Convert the array size into a canonical width matching the pointer size for 1357 // the target. 1358 llvm::APInt ArySize(ArySizeIn); 1359 ArySize.zextOrTrunc(Target.getPointerWidth(EltTy.getAddressSpace())); 1360 1361 llvm::FoldingSetNodeID ID; 1362 ConstantArrayType::Profile(ID, EltTy, ArySize, ASM, EltTypeQuals); 1363 1364 void *InsertPos = 0; 1365 if (ConstantArrayType *ATP = 1366 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1367 return QualType(ATP, 0); 1368 1369 // If the element type isn't canonical, this won't be a canonical type either, 1370 // so fill in the canonical type field. 1371 QualType Canonical; 1372 if (!EltTy.isCanonical()) { 1373 Canonical = getConstantArrayType(getCanonicalType(EltTy), ArySize, 1374 ASM, EltTypeQuals); 1375 // Get the new insert position for the node we care about. 1376 ConstantArrayType *NewIP = 1377 ConstantArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1378 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1379 } 1380 1381 ConstantArrayType *New = new(*this,TypeAlignment) 1382 ConstantArrayType(EltTy, Canonical, ArySize, ASM, EltTypeQuals); 1383 ConstantArrayTypes.InsertNode(New, InsertPos); 1384 Types.push_back(New); 1385 return QualType(New, 0); 1386} 1387 1388/// getVariableArrayType - Returns a non-unique reference to the type for a 1389/// variable array of the specified element type. 1390QualType ASTContext::getVariableArrayType(QualType EltTy, 1391 Expr *NumElts, 1392 ArrayType::ArraySizeModifier ASM, 1393 unsigned EltTypeQuals, 1394 SourceRange Brackets) { 1395 // Since we don't unique expressions, it isn't possible to unique VLA's 1396 // that have an expression provided for their size. 1397 1398 VariableArrayType *New = new(*this, TypeAlignment) 1399 VariableArrayType(EltTy, QualType(), NumElts, ASM, EltTypeQuals, Brackets); 1400 1401 VariableArrayTypes.push_back(New); 1402 Types.push_back(New); 1403 return QualType(New, 0); 1404} 1405 1406/// getDependentSizedArrayType - Returns a non-unique reference to 1407/// the type for a dependently-sized array of the specified element 1408/// type. 1409QualType ASTContext::getDependentSizedArrayType(QualType EltTy, 1410 Expr *NumElts, 1411 ArrayType::ArraySizeModifier ASM, 1412 unsigned EltTypeQuals, 1413 SourceRange Brackets) { 1414 assert((!NumElts || NumElts->isTypeDependent() || 1415 NumElts->isValueDependent()) && 1416 "Size must be type- or value-dependent!"); 1417 1418 void *InsertPos = 0; 1419 DependentSizedArrayType *Canon = 0; 1420 llvm::FoldingSetNodeID ID; 1421 1422 if (NumElts) { 1423 // Dependently-sized array types that do not have a specified 1424 // number of elements will have their sizes deduced from an 1425 // initializer. 1426 DependentSizedArrayType::Profile(ID, *this, getCanonicalType(EltTy), ASM, 1427 EltTypeQuals, NumElts); 1428 1429 Canon = DependentSizedArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1430 } 1431 1432 DependentSizedArrayType *New; 1433 if (Canon) { 1434 // We already have a canonical version of this array type; use it as 1435 // the canonical type for a newly-built type. 1436 New = new (*this, TypeAlignment) 1437 DependentSizedArrayType(*this, EltTy, QualType(Canon, 0), 1438 NumElts, ASM, EltTypeQuals, Brackets); 1439 } else { 1440 QualType CanonEltTy = getCanonicalType(EltTy); 1441 if (CanonEltTy == EltTy) { 1442 New = new (*this, TypeAlignment) 1443 DependentSizedArrayType(*this, EltTy, QualType(), 1444 NumElts, ASM, EltTypeQuals, Brackets); 1445 1446 if (NumElts) { 1447 DependentSizedArrayType *CanonCheck 1448 = DependentSizedArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1449 assert(!CanonCheck && "Dependent-sized canonical array type broken"); 1450 (void)CanonCheck; 1451 DependentSizedArrayTypes.InsertNode(New, InsertPos); 1452 } 1453 } else { 1454 QualType Canon = getDependentSizedArrayType(CanonEltTy, NumElts, 1455 ASM, EltTypeQuals, 1456 SourceRange()); 1457 New = new (*this, TypeAlignment) 1458 DependentSizedArrayType(*this, EltTy, Canon, 1459 NumElts, ASM, EltTypeQuals, Brackets); 1460 } 1461 } 1462 1463 Types.push_back(New); 1464 return QualType(New, 0); 1465} 1466 1467QualType ASTContext::getIncompleteArrayType(QualType EltTy, 1468 ArrayType::ArraySizeModifier ASM, 1469 unsigned EltTypeQuals) { 1470 llvm::FoldingSetNodeID ID; 1471 IncompleteArrayType::Profile(ID, EltTy, ASM, EltTypeQuals); 1472 1473 void *InsertPos = 0; 1474 if (IncompleteArrayType *ATP = 1475 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos)) 1476 return QualType(ATP, 0); 1477 1478 // If the element type isn't canonical, this won't be a canonical type 1479 // either, so fill in the canonical type field. 1480 QualType Canonical; 1481 1482 if (!EltTy.isCanonical()) { 1483 Canonical = getIncompleteArrayType(getCanonicalType(EltTy), 1484 ASM, EltTypeQuals); 1485 1486 // Get the new insert position for the node we care about. 1487 IncompleteArrayType *NewIP = 1488 IncompleteArrayTypes.FindNodeOrInsertPos(ID, InsertPos); 1489 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1490 } 1491 1492 IncompleteArrayType *New = new (*this, TypeAlignment) 1493 IncompleteArrayType(EltTy, Canonical, ASM, EltTypeQuals); 1494 1495 IncompleteArrayTypes.InsertNode(New, InsertPos); 1496 Types.push_back(New); 1497 return QualType(New, 0); 1498} 1499 1500/// getVectorType - Return the unique reference to a vector type of 1501/// the specified element type and size. VectorType must be a built-in type. 1502QualType ASTContext::getVectorType(QualType vecType, unsigned NumElts, 1503 bool IsAltiVec, bool IsPixel) { 1504 BuiltinType *baseType; 1505 1506 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1507 assert(baseType != 0 && "getVectorType(): Expecting a built-in type"); 1508 1509 // Check if we've already instantiated a vector of this type. 1510 llvm::FoldingSetNodeID ID; 1511 VectorType::Profile(ID, vecType, NumElts, Type::Vector, 1512 IsAltiVec, IsPixel); 1513 void *InsertPos = 0; 1514 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1515 return QualType(VTP, 0); 1516 1517 // If the element type isn't canonical, this won't be a canonical type either, 1518 // so fill in the canonical type field. 1519 QualType Canonical; 1520 if (!vecType.isCanonical() || IsAltiVec || IsPixel) { 1521 Canonical = getVectorType(getCanonicalType(vecType), 1522 NumElts, false, false); 1523 1524 // Get the new insert position for the node we care about. 1525 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1526 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1527 } 1528 VectorType *New = new (*this, TypeAlignment) 1529 VectorType(vecType, NumElts, Canonical, IsAltiVec, IsPixel); 1530 VectorTypes.InsertNode(New, InsertPos); 1531 Types.push_back(New); 1532 return QualType(New, 0); 1533} 1534 1535/// getExtVectorType - Return the unique reference to an extended vector type of 1536/// the specified element type and size. VectorType must be a built-in type. 1537QualType ASTContext::getExtVectorType(QualType vecType, unsigned NumElts) { 1538 BuiltinType *baseType; 1539 1540 baseType = dyn_cast<BuiltinType>(getCanonicalType(vecType).getTypePtr()); 1541 assert(baseType != 0 && "getExtVectorType(): Expecting a built-in type"); 1542 1543 // Check if we've already instantiated a vector of this type. 1544 llvm::FoldingSetNodeID ID; 1545 VectorType::Profile(ID, vecType, NumElts, Type::ExtVector, false, false); 1546 void *InsertPos = 0; 1547 if (VectorType *VTP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos)) 1548 return QualType(VTP, 0); 1549 1550 // If the element type isn't canonical, this won't be a canonical type either, 1551 // so fill in the canonical type field. 1552 QualType Canonical; 1553 if (!vecType.isCanonical()) { 1554 Canonical = getExtVectorType(getCanonicalType(vecType), NumElts); 1555 1556 // Get the new insert position for the node we care about. 1557 VectorType *NewIP = VectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1558 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1559 } 1560 ExtVectorType *New = new (*this, TypeAlignment) 1561 ExtVectorType(vecType, NumElts, Canonical); 1562 VectorTypes.InsertNode(New, InsertPos); 1563 Types.push_back(New); 1564 return QualType(New, 0); 1565} 1566 1567QualType ASTContext::getDependentSizedExtVectorType(QualType vecType, 1568 Expr *SizeExpr, 1569 SourceLocation AttrLoc) { 1570 llvm::FoldingSetNodeID ID; 1571 DependentSizedExtVectorType::Profile(ID, *this, getCanonicalType(vecType), 1572 SizeExpr); 1573 1574 void *InsertPos = 0; 1575 DependentSizedExtVectorType *Canon 1576 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1577 DependentSizedExtVectorType *New; 1578 if (Canon) { 1579 // We already have a canonical version of this array type; use it as 1580 // the canonical type for a newly-built type. 1581 New = new (*this, TypeAlignment) 1582 DependentSizedExtVectorType(*this, vecType, QualType(Canon, 0), 1583 SizeExpr, AttrLoc); 1584 } else { 1585 QualType CanonVecTy = getCanonicalType(vecType); 1586 if (CanonVecTy == vecType) { 1587 New = new (*this, TypeAlignment) 1588 DependentSizedExtVectorType(*this, vecType, QualType(), SizeExpr, 1589 AttrLoc); 1590 1591 DependentSizedExtVectorType *CanonCheck 1592 = DependentSizedExtVectorTypes.FindNodeOrInsertPos(ID, InsertPos); 1593 assert(!CanonCheck && "Dependent-sized ext_vector canonical type broken"); 1594 (void)CanonCheck; 1595 DependentSizedExtVectorTypes.InsertNode(New, InsertPos); 1596 } else { 1597 QualType Canon = getDependentSizedExtVectorType(CanonVecTy, SizeExpr, 1598 SourceLocation()); 1599 New = new (*this, TypeAlignment) 1600 DependentSizedExtVectorType(*this, vecType, Canon, SizeExpr, AttrLoc); 1601 } 1602 } 1603 1604 Types.push_back(New); 1605 return QualType(New, 0); 1606} 1607 1608/// getFunctionNoProtoType - Return a K&R style C function type like 'int()'. 1609/// 1610QualType ASTContext::getFunctionNoProtoType(QualType ResultTy, 1611 const FunctionType::ExtInfo &Info) { 1612 const CallingConv CallConv = Info.getCC(); 1613 // Unique functions, to guarantee there is only one function of a particular 1614 // structure. 1615 llvm::FoldingSetNodeID ID; 1616 FunctionNoProtoType::Profile(ID, ResultTy, Info); 1617 1618 void *InsertPos = 0; 1619 if (FunctionNoProtoType *FT = 1620 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1621 return QualType(FT, 0); 1622 1623 QualType Canonical; 1624 if (!ResultTy.isCanonical() || 1625 getCanonicalCallConv(CallConv) != CallConv) { 1626 Canonical = 1627 getFunctionNoProtoType(getCanonicalType(ResultTy), 1628 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1629 1630 // Get the new insert position for the node we care about. 1631 FunctionNoProtoType *NewIP = 1632 FunctionNoProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1633 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1634 } 1635 1636 FunctionNoProtoType *New = new (*this, TypeAlignment) 1637 FunctionNoProtoType(ResultTy, Canonical, Info); 1638 Types.push_back(New); 1639 FunctionNoProtoTypes.InsertNode(New, InsertPos); 1640 return QualType(New, 0); 1641} 1642 1643/// getFunctionType - Return a normal function type with a typed argument 1644/// list. isVariadic indicates whether the argument list includes '...'. 1645QualType ASTContext::getFunctionType(QualType ResultTy,const QualType *ArgArray, 1646 unsigned NumArgs, bool isVariadic, 1647 unsigned TypeQuals, bool hasExceptionSpec, 1648 bool hasAnyExceptionSpec, unsigned NumExs, 1649 const QualType *ExArray, 1650 const FunctionType::ExtInfo &Info) { 1651 const CallingConv CallConv= Info.getCC(); 1652 // Unique functions, to guarantee there is only one function of a particular 1653 // structure. 1654 llvm::FoldingSetNodeID ID; 1655 FunctionProtoType::Profile(ID, ResultTy, ArgArray, NumArgs, isVariadic, 1656 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1657 NumExs, ExArray, Info); 1658 1659 void *InsertPos = 0; 1660 if (FunctionProtoType *FTP = 1661 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos)) 1662 return QualType(FTP, 0); 1663 1664 // Determine whether the type being created is already canonical or not. 1665 bool isCanonical = !hasExceptionSpec && ResultTy.isCanonical(); 1666 for (unsigned i = 0; i != NumArgs && isCanonical; ++i) 1667 if (!ArgArray[i].isCanonicalAsParam()) 1668 isCanonical = false; 1669 1670 // If this type isn't canonical, get the canonical version of it. 1671 // The exception spec is not part of the canonical type. 1672 QualType Canonical; 1673 if (!isCanonical || getCanonicalCallConv(CallConv) != CallConv) { 1674 llvm::SmallVector<QualType, 16> CanonicalArgs; 1675 CanonicalArgs.reserve(NumArgs); 1676 for (unsigned i = 0; i != NumArgs; ++i) 1677 CanonicalArgs.push_back(getCanonicalParamType(ArgArray[i])); 1678 1679 Canonical = getFunctionType(getCanonicalType(ResultTy), 1680 CanonicalArgs.data(), NumArgs, 1681 isVariadic, TypeQuals, false, 1682 false, 0, 0, 1683 Info.withCallingConv(getCanonicalCallConv(CallConv))); 1684 1685 // Get the new insert position for the node we care about. 1686 FunctionProtoType *NewIP = 1687 FunctionProtoTypes.FindNodeOrInsertPos(ID, InsertPos); 1688 assert(NewIP == 0 && "Shouldn't be in the map!"); NewIP = NewIP; 1689 } 1690 1691 // FunctionProtoType objects are allocated with extra bytes after them 1692 // for two variable size arrays (for parameter and exception types) at the 1693 // end of them. 1694 FunctionProtoType *FTP = 1695 (FunctionProtoType*)Allocate(sizeof(FunctionProtoType) + 1696 NumArgs*sizeof(QualType) + 1697 NumExs*sizeof(QualType), TypeAlignment); 1698 new (FTP) FunctionProtoType(ResultTy, ArgArray, NumArgs, isVariadic, 1699 TypeQuals, hasExceptionSpec, hasAnyExceptionSpec, 1700 ExArray, NumExs, Canonical, Info); 1701 Types.push_back(FTP); 1702 FunctionProtoTypes.InsertNode(FTP, InsertPos); 1703 return QualType(FTP, 0); 1704} 1705 1706#ifndef NDEBUG 1707static bool NeedsInjectedClassNameType(const RecordDecl *D) { 1708 if (!isa<CXXRecordDecl>(D)) return false; 1709 const CXXRecordDecl *RD = cast<CXXRecordDecl>(D); 1710 if (isa<ClassTemplatePartialSpecializationDecl>(RD)) 1711 return true; 1712 if (RD->getDescribedClassTemplate() && 1713 !isa<ClassTemplateSpecializationDecl>(RD)) 1714 return true; 1715 return false; 1716} 1717#endif 1718 1719/// getInjectedClassNameType - Return the unique reference to the 1720/// injected class name type for the specified templated declaration. 1721QualType ASTContext::getInjectedClassNameType(CXXRecordDecl *Decl, 1722 QualType TST) { 1723 assert(NeedsInjectedClassNameType(Decl)); 1724 if (Decl->TypeForDecl) { 1725 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1726 } else if (CXXRecordDecl *PrevDecl 1727 = cast_or_null<CXXRecordDecl>(Decl->getPreviousDeclaration())) { 1728 assert(PrevDecl->TypeForDecl && "previous declaration has no type"); 1729 Decl->TypeForDecl = PrevDecl->TypeForDecl; 1730 assert(isa<InjectedClassNameType>(Decl->TypeForDecl)); 1731 } else { 1732 Decl->TypeForDecl = new (*this, TypeAlignment) 1733 InjectedClassNameType(Decl, TST, TST->getCanonicalTypeInternal()); 1734 Types.push_back(Decl->TypeForDecl); 1735 } 1736 return QualType(Decl->TypeForDecl, 0); 1737} 1738 1739/// getTypeDeclType - Return the unique reference to the type for the 1740/// specified type declaration. 1741QualType ASTContext::getTypeDeclTypeSlow(const TypeDecl *Decl) { 1742 assert(Decl && "Passed null for Decl param"); 1743 assert(!Decl->TypeForDecl && "TypeForDecl present in slow case"); 1744 1745 if (const TypedefDecl *Typedef = dyn_cast<TypedefDecl>(Decl)) 1746 return getTypedefType(Typedef); 1747 1748 if (const ObjCInterfaceDecl *ObjCInterface 1749 = dyn_cast<ObjCInterfaceDecl>(Decl)) 1750 return getObjCInterfaceType(ObjCInterface); 1751 1752 assert(!isa<TemplateTypeParmDecl>(Decl) && 1753 "Template type parameter types are always available."); 1754 1755 if (const RecordDecl *Record = dyn_cast<RecordDecl>(Decl)) { 1756 assert(!Record->getPreviousDeclaration() && 1757 "struct/union has previous declaration"); 1758 assert(!NeedsInjectedClassNameType(Record)); 1759 Decl->TypeForDecl = new (*this, TypeAlignment) RecordType(Record); 1760 } else if (const EnumDecl *Enum = dyn_cast<EnumDecl>(Decl)) { 1761 assert(!Enum->getPreviousDeclaration() && 1762 "enum has previous declaration"); 1763 Decl->TypeForDecl = new (*this, TypeAlignment) EnumType(Enum); 1764 } else if (const UnresolvedUsingTypenameDecl *Using = 1765 dyn_cast<UnresolvedUsingTypenameDecl>(Decl)) { 1766 Decl->TypeForDecl = new (*this, TypeAlignment) UnresolvedUsingType(Using); 1767 } else 1768 llvm_unreachable("TypeDecl without a type?"); 1769 1770 Types.push_back(Decl->TypeForDecl); 1771 return QualType(Decl->TypeForDecl, 0); 1772} 1773 1774/// getTypedefType - Return the unique reference to the type for the 1775/// specified typename decl. 1776QualType ASTContext::getTypedefType(const TypedefDecl *Decl) { 1777 if (Decl->TypeForDecl) return QualType(Decl->TypeForDecl, 0); 1778 1779 QualType Canonical = getCanonicalType(Decl->getUnderlyingType()); 1780 Decl->TypeForDecl = new(*this, TypeAlignment) 1781 TypedefType(Type::Typedef, Decl, Canonical); 1782 Types.push_back(Decl->TypeForDecl); 1783 return QualType(Decl->TypeForDecl, 0); 1784} 1785 1786/// \brief Retrieve a substitution-result type. 1787QualType 1788ASTContext::getSubstTemplateTypeParmType(const TemplateTypeParmType *Parm, 1789 QualType Replacement) { 1790 assert(Replacement.isCanonical() 1791 && "replacement types must always be canonical"); 1792 1793 llvm::FoldingSetNodeID ID; 1794 SubstTemplateTypeParmType::Profile(ID, Parm, Replacement); 1795 void *InsertPos = 0; 1796 SubstTemplateTypeParmType *SubstParm 1797 = SubstTemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1798 1799 if (!SubstParm) { 1800 SubstParm = new (*this, TypeAlignment) 1801 SubstTemplateTypeParmType(Parm, Replacement); 1802 Types.push_back(SubstParm); 1803 SubstTemplateTypeParmTypes.InsertNode(SubstParm, InsertPos); 1804 } 1805 1806 return QualType(SubstParm, 0); 1807} 1808 1809/// \brief Retrieve the template type parameter type for a template 1810/// parameter or parameter pack with the given depth, index, and (optionally) 1811/// name. 1812QualType ASTContext::getTemplateTypeParmType(unsigned Depth, unsigned Index, 1813 bool ParameterPack, 1814 IdentifierInfo *Name) { 1815 llvm::FoldingSetNodeID ID; 1816 TemplateTypeParmType::Profile(ID, Depth, Index, ParameterPack, Name); 1817 void *InsertPos = 0; 1818 TemplateTypeParmType *TypeParm 1819 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1820 1821 if (TypeParm) 1822 return QualType(TypeParm, 0); 1823 1824 if (Name) { 1825 QualType Canon = getTemplateTypeParmType(Depth, Index, ParameterPack); 1826 TypeParm = new (*this, TypeAlignment) 1827 TemplateTypeParmType(Depth, Index, ParameterPack, Name, Canon); 1828 1829 TemplateTypeParmType *TypeCheck 1830 = TemplateTypeParmTypes.FindNodeOrInsertPos(ID, InsertPos); 1831 assert(!TypeCheck && "Template type parameter canonical type broken"); 1832 (void)TypeCheck; 1833 } else 1834 TypeParm = new (*this, TypeAlignment) 1835 TemplateTypeParmType(Depth, Index, ParameterPack); 1836 1837 Types.push_back(TypeParm); 1838 TemplateTypeParmTypes.InsertNode(TypeParm, InsertPos); 1839 1840 return QualType(TypeParm, 0); 1841} 1842 1843TypeSourceInfo * 1844ASTContext::getTemplateSpecializationTypeInfo(TemplateName Name, 1845 SourceLocation NameLoc, 1846 const TemplateArgumentListInfo &Args, 1847 QualType CanonType) { 1848 QualType TST = getTemplateSpecializationType(Name, Args, CanonType); 1849 1850 TypeSourceInfo *DI = CreateTypeSourceInfo(TST); 1851 TemplateSpecializationTypeLoc TL 1852 = cast<TemplateSpecializationTypeLoc>(DI->getTypeLoc()); 1853 TL.setTemplateNameLoc(NameLoc); 1854 TL.setLAngleLoc(Args.getLAngleLoc()); 1855 TL.setRAngleLoc(Args.getRAngleLoc()); 1856 for (unsigned i = 0, e = TL.getNumArgs(); i != e; ++i) 1857 TL.setArgLocInfo(i, Args[i].getLocInfo()); 1858 return DI; 1859} 1860 1861QualType 1862ASTContext::getTemplateSpecializationType(TemplateName Template, 1863 const TemplateArgumentListInfo &Args, 1864 QualType Canon) { 1865 unsigned NumArgs = Args.size(); 1866 1867 llvm::SmallVector<TemplateArgument, 4> ArgVec; 1868 ArgVec.reserve(NumArgs); 1869 for (unsigned i = 0; i != NumArgs; ++i) 1870 ArgVec.push_back(Args[i].getArgument()); 1871 1872 return getTemplateSpecializationType(Template, ArgVec.data(), NumArgs, Canon); 1873} 1874 1875QualType 1876ASTContext::getTemplateSpecializationType(TemplateName Template, 1877 const TemplateArgument *Args, 1878 unsigned NumArgs, 1879 QualType Canon) { 1880 if (!Canon.isNull()) 1881 Canon = getCanonicalType(Canon); 1882 else { 1883 // Build the canonical template specialization type. 1884 TemplateName CanonTemplate = getCanonicalTemplateName(Template); 1885 llvm::SmallVector<TemplateArgument, 4> CanonArgs; 1886 CanonArgs.reserve(NumArgs); 1887 for (unsigned I = 0; I != NumArgs; ++I) 1888 CanonArgs.push_back(getCanonicalTemplateArgument(Args[I])); 1889 1890 // Determine whether this canonical template specialization type already 1891 // exists. 1892 llvm::FoldingSetNodeID ID; 1893 TemplateSpecializationType::Profile(ID, CanonTemplate, 1894 CanonArgs.data(), NumArgs, *this); 1895 1896 void *InsertPos = 0; 1897 TemplateSpecializationType *Spec 1898 = TemplateSpecializationTypes.FindNodeOrInsertPos(ID, InsertPos); 1899 1900 if (!Spec) { 1901 // Allocate a new canonical template specialization type. 1902 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 1903 sizeof(TemplateArgument) * NumArgs), 1904 TypeAlignment); 1905 Spec = new (Mem) TemplateSpecializationType(*this, CanonTemplate, 1906 CanonArgs.data(), NumArgs, 1907 Canon); 1908 Types.push_back(Spec); 1909 TemplateSpecializationTypes.InsertNode(Spec, InsertPos); 1910 } 1911 1912 if (Canon.isNull()) 1913 Canon = QualType(Spec, 0); 1914 assert(Canon->isDependentType() && 1915 "Non-dependent template-id type must have a canonical type"); 1916 } 1917 1918 // Allocate the (non-canonical) template specialization type, but don't 1919 // try to unique it: these types typically have location information that 1920 // we don't unique and don't want to lose. 1921 void *Mem = Allocate((sizeof(TemplateSpecializationType) + 1922 sizeof(TemplateArgument) * NumArgs), 1923 TypeAlignment); 1924 TemplateSpecializationType *Spec 1925 = new (Mem) TemplateSpecializationType(*this, Template, Args, NumArgs, 1926 Canon); 1927 1928 Types.push_back(Spec); 1929 return QualType(Spec, 0); 1930} 1931 1932QualType 1933ASTContext::getQualifiedNameType(NestedNameSpecifier *NNS, 1934 QualType NamedType) { 1935 llvm::FoldingSetNodeID ID; 1936 QualifiedNameType::Profile(ID, NNS, NamedType); 1937 1938 void *InsertPos = 0; 1939 QualifiedNameType *T 1940 = QualifiedNameTypes.FindNodeOrInsertPos(ID, InsertPos); 1941 if (T) 1942 return QualType(T, 0); 1943 1944 QualType Canon = NamedType; 1945 if (!Canon.isCanonical()) { 1946 Canon = getCanonicalType(NamedType); 1947 QualifiedNameType *CheckT 1948 = QualifiedNameTypes.FindNodeOrInsertPos(ID, InsertPos); 1949 assert(!CheckT && "Qualified name canonical type broken"); 1950 (void)CheckT; 1951 } 1952 1953 T = new (*this) QualifiedNameType(NNS, NamedType, Canon); 1954 Types.push_back(T); 1955 QualifiedNameTypes.InsertNode(T, InsertPos); 1956 return QualType(T, 0); 1957} 1958 1959QualType ASTContext::getTypenameType(NestedNameSpecifier *NNS, 1960 const IdentifierInfo *Name, 1961 QualType Canon) { 1962 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 1963 1964 if (Canon.isNull()) { 1965 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 1966 if (CanonNNS != NNS) 1967 Canon = getTypenameType(CanonNNS, Name); 1968 } 1969 1970 llvm::FoldingSetNodeID ID; 1971 TypenameType::Profile(ID, NNS, Name); 1972 1973 void *InsertPos = 0; 1974 TypenameType *T 1975 = TypenameTypes.FindNodeOrInsertPos(ID, InsertPos); 1976 if (T) 1977 return QualType(T, 0); 1978 1979 T = new (*this) TypenameType(NNS, Name, Canon); 1980 Types.push_back(T); 1981 TypenameTypes.InsertNode(T, InsertPos); 1982 return QualType(T, 0); 1983} 1984 1985QualType 1986ASTContext::getTypenameType(NestedNameSpecifier *NNS, 1987 const TemplateSpecializationType *TemplateId, 1988 QualType Canon) { 1989 assert(NNS->isDependent() && "nested-name-specifier must be dependent"); 1990 1991 llvm::FoldingSetNodeID ID; 1992 TypenameType::Profile(ID, NNS, TemplateId); 1993 1994 void *InsertPos = 0; 1995 TypenameType *T 1996 = TypenameTypes.FindNodeOrInsertPos(ID, InsertPos); 1997 if (T) 1998 return QualType(T, 0); 1999 2000 if (Canon.isNull()) { 2001 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 2002 QualType CanonType = getCanonicalType(QualType(TemplateId, 0)); 2003 if (CanonNNS != NNS || CanonType != QualType(TemplateId, 0)) { 2004 const TemplateSpecializationType *CanonTemplateId 2005 = CanonType->getAs<TemplateSpecializationType>(); 2006 assert(CanonTemplateId && 2007 "Canonical type must also be a template specialization type"); 2008 Canon = getTypenameType(CanonNNS, CanonTemplateId); 2009 } 2010 2011 TypenameType *CheckT 2012 = TypenameTypes.FindNodeOrInsertPos(ID, InsertPos); 2013 assert(!CheckT && "Typename canonical type is broken"); (void)CheckT; 2014 } 2015 2016 T = new (*this) TypenameType(NNS, TemplateId, Canon); 2017 Types.push_back(T); 2018 TypenameTypes.InsertNode(T, InsertPos); 2019 return QualType(T, 0); 2020} 2021 2022QualType 2023ASTContext::getElaboratedType(QualType UnderlyingType, 2024 ElaboratedType::TagKind Tag) { 2025 llvm::FoldingSetNodeID ID; 2026 ElaboratedType::Profile(ID, UnderlyingType, Tag); 2027 2028 void *InsertPos = 0; 2029 ElaboratedType *T = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2030 if (T) 2031 return QualType(T, 0); 2032 2033 QualType Canon = UnderlyingType; 2034 if (!Canon.isCanonical()) { 2035 Canon = getCanonicalType(Canon); 2036 ElaboratedType *CheckT = ElaboratedTypes.FindNodeOrInsertPos(ID, InsertPos); 2037 assert(!CheckT && "Elaborated canonical type is broken"); (void)CheckT; 2038 } 2039 2040 T = new (*this) ElaboratedType(UnderlyingType, Tag, Canon); 2041 Types.push_back(T); 2042 ElaboratedTypes.InsertNode(T, InsertPos); 2043 return QualType(T, 0); 2044} 2045 2046/// CmpProtocolNames - Comparison predicate for sorting protocols 2047/// alphabetically. 2048static bool CmpProtocolNames(const ObjCProtocolDecl *LHS, 2049 const ObjCProtocolDecl *RHS) { 2050 return LHS->getDeclName() < RHS->getDeclName(); 2051} 2052 2053static bool areSortedAndUniqued(ObjCProtocolDecl **Protocols, 2054 unsigned NumProtocols) { 2055 if (NumProtocols == 0) return true; 2056 2057 for (unsigned i = 1; i != NumProtocols; ++i) 2058 if (!CmpProtocolNames(Protocols[i-1], Protocols[i])) 2059 return false; 2060 return true; 2061} 2062 2063static void SortAndUniqueProtocols(ObjCProtocolDecl **Protocols, 2064 unsigned &NumProtocols) { 2065 ObjCProtocolDecl **ProtocolsEnd = Protocols+NumProtocols; 2066 2067 // Sort protocols, keyed by name. 2068 std::sort(Protocols, Protocols+NumProtocols, CmpProtocolNames); 2069 2070 // Remove duplicates. 2071 ProtocolsEnd = std::unique(Protocols, ProtocolsEnd); 2072 NumProtocols = ProtocolsEnd-Protocols; 2073} 2074 2075/// getObjCObjectPointerType - Return a ObjCObjectPointerType type for 2076/// the given interface decl and the conforming protocol list. 2077QualType ASTContext::getObjCObjectPointerType(QualType InterfaceT, 2078 ObjCProtocolDecl **Protocols, 2079 unsigned NumProtocols, 2080 unsigned Quals) { 2081 llvm::FoldingSetNodeID ID; 2082 ObjCObjectPointerType::Profile(ID, InterfaceT, Protocols, NumProtocols); 2083 Qualifiers Qs = Qualifiers::fromCVRMask(Quals); 2084 2085 void *InsertPos = 0; 2086 if (ObjCObjectPointerType *QT = 2087 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos)) 2088 return getQualifiedType(QualType(QT, 0), Qs); 2089 2090 // Sort the protocol list alphabetically to canonicalize it. 2091 QualType Canonical; 2092 if (!InterfaceT.isCanonical() || 2093 !areSortedAndUniqued(Protocols, NumProtocols)) { 2094 if (!areSortedAndUniqued(Protocols, NumProtocols)) { 2095 llvm::SmallVector<ObjCProtocolDecl*, 8> Sorted(NumProtocols); 2096 unsigned UniqueCount = NumProtocols; 2097 2098 std::copy(Protocols, Protocols + NumProtocols, Sorted.begin()); 2099 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2100 2101 Canonical = getObjCObjectPointerType(getCanonicalType(InterfaceT), 2102 &Sorted[0], UniqueCount); 2103 } else { 2104 Canonical = getObjCObjectPointerType(getCanonicalType(InterfaceT), 2105 Protocols, NumProtocols); 2106 } 2107 2108 // Regenerate InsertPos. 2109 ObjCObjectPointerTypes.FindNodeOrInsertPos(ID, InsertPos); 2110 } 2111 2112 // No match. 2113 unsigned Size = sizeof(ObjCObjectPointerType) 2114 + NumProtocols * sizeof(ObjCProtocolDecl *); 2115 void *Mem = Allocate(Size, TypeAlignment); 2116 ObjCObjectPointerType *QType = new (Mem) ObjCObjectPointerType(Canonical, 2117 InterfaceT, 2118 Protocols, 2119 NumProtocols); 2120 2121 Types.push_back(QType); 2122 ObjCObjectPointerTypes.InsertNode(QType, InsertPos); 2123 return getQualifiedType(QualType(QType, 0), Qs); 2124} 2125 2126/// getObjCInterfaceType - Return the unique reference to the type for the 2127/// specified ObjC interface decl. The list of protocols is optional. 2128QualType ASTContext::getObjCInterfaceType(const ObjCInterfaceDecl *Decl, 2129 ObjCProtocolDecl **Protocols, unsigned NumProtocols) { 2130 llvm::FoldingSetNodeID ID; 2131 ObjCInterfaceType::Profile(ID, Decl, Protocols, NumProtocols); 2132 2133 void *InsertPos = 0; 2134 if (ObjCInterfaceType *QT = 2135 ObjCInterfaceTypes.FindNodeOrInsertPos(ID, InsertPos)) 2136 return QualType(QT, 0); 2137 2138 // Sort the protocol list alphabetically to canonicalize it. 2139 QualType Canonical; 2140 if (NumProtocols && !areSortedAndUniqued(Protocols, NumProtocols)) { 2141 llvm::SmallVector<ObjCProtocolDecl*, 8> Sorted(NumProtocols); 2142 std::copy(Protocols, Protocols + NumProtocols, Sorted.begin()); 2143 2144 unsigned UniqueCount = NumProtocols; 2145 SortAndUniqueProtocols(&Sorted[0], UniqueCount); 2146 2147 Canonical = getObjCInterfaceType(Decl, &Sorted[0], UniqueCount); 2148 2149 ObjCInterfaceTypes.FindNodeOrInsertPos(ID, InsertPos); 2150 } 2151 2152 unsigned Size = sizeof(ObjCInterfaceType) 2153 + NumProtocols * sizeof(ObjCProtocolDecl *); 2154 void *Mem = Allocate(Size, TypeAlignment); 2155 ObjCInterfaceType *QType = new (Mem) ObjCInterfaceType(Canonical, 2156 const_cast<ObjCInterfaceDecl*>(Decl), 2157 Protocols, 2158 NumProtocols); 2159 2160 Types.push_back(QType); 2161 ObjCInterfaceTypes.InsertNode(QType, InsertPos); 2162 return QualType(QType, 0); 2163} 2164 2165/// getTypeOfExprType - Unlike many "get<Type>" functions, we can't unique 2166/// TypeOfExprType AST's (since expression's are never shared). For example, 2167/// multiple declarations that refer to "typeof(x)" all contain different 2168/// DeclRefExpr's. This doesn't effect the type checker, since it operates 2169/// on canonical type's (which are always unique). 2170QualType ASTContext::getTypeOfExprType(Expr *tofExpr) { 2171 TypeOfExprType *toe; 2172 if (tofExpr->isTypeDependent()) { 2173 llvm::FoldingSetNodeID ID; 2174 DependentTypeOfExprType::Profile(ID, *this, tofExpr); 2175 2176 void *InsertPos = 0; 2177 DependentTypeOfExprType *Canon 2178 = DependentTypeOfExprTypes.FindNodeOrInsertPos(ID, InsertPos); 2179 if (Canon) { 2180 // We already have a "canonical" version of an identical, dependent 2181 // typeof(expr) type. Use that as our canonical type. 2182 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, 2183 QualType((TypeOfExprType*)Canon, 0)); 2184 } 2185 else { 2186 // Build a new, canonical typeof(expr) type. 2187 Canon 2188 = new (*this, TypeAlignment) DependentTypeOfExprType(*this, tofExpr); 2189 DependentTypeOfExprTypes.InsertNode(Canon, InsertPos); 2190 toe = Canon; 2191 } 2192 } else { 2193 QualType Canonical = getCanonicalType(tofExpr->getType()); 2194 toe = new (*this, TypeAlignment) TypeOfExprType(tofExpr, Canonical); 2195 } 2196 Types.push_back(toe); 2197 return QualType(toe, 0); 2198} 2199 2200/// getTypeOfType - Unlike many "get<Type>" functions, we don't unique 2201/// TypeOfType AST's. The only motivation to unique these nodes would be 2202/// memory savings. Since typeof(t) is fairly uncommon, space shouldn't be 2203/// an issue. This doesn't effect the type checker, since it operates 2204/// on canonical type's (which are always unique). 2205QualType ASTContext::getTypeOfType(QualType tofType) { 2206 QualType Canonical = getCanonicalType(tofType); 2207 TypeOfType *tot = new (*this, TypeAlignment) TypeOfType(tofType, Canonical); 2208 Types.push_back(tot); 2209 return QualType(tot, 0); 2210} 2211 2212/// getDecltypeForExpr - Given an expr, will return the decltype for that 2213/// expression, according to the rules in C++0x [dcl.type.simple]p4 2214static QualType getDecltypeForExpr(const Expr *e, ASTContext &Context) { 2215 if (e->isTypeDependent()) 2216 return Context.DependentTy; 2217 2218 // If e is an id expression or a class member access, decltype(e) is defined 2219 // as the type of the entity named by e. 2220 if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(e)) { 2221 if (const ValueDecl *VD = dyn_cast<ValueDecl>(DRE->getDecl())) 2222 return VD->getType(); 2223 } 2224 if (const MemberExpr *ME = dyn_cast<MemberExpr>(e)) { 2225 if (const FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) 2226 return FD->getType(); 2227 } 2228 // If e is a function call or an invocation of an overloaded operator, 2229 // (parentheses around e are ignored), decltype(e) is defined as the 2230 // return type of that function. 2231 if (const CallExpr *CE = dyn_cast<CallExpr>(e->IgnoreParens())) 2232 return CE->getCallReturnType(); 2233 2234 QualType T = e->getType(); 2235 2236 // Otherwise, where T is the type of e, if e is an lvalue, decltype(e) is 2237 // defined as T&, otherwise decltype(e) is defined as T. 2238 if (e->isLvalue(Context) == Expr::LV_Valid) 2239 T = Context.getLValueReferenceType(T); 2240 2241 return T; 2242} 2243 2244/// getDecltypeType - Unlike many "get<Type>" functions, we don't unique 2245/// DecltypeType AST's. The only motivation to unique these nodes would be 2246/// memory savings. Since decltype(t) is fairly uncommon, space shouldn't be 2247/// an issue. This doesn't effect the type checker, since it operates 2248/// on canonical type's (which are always unique). 2249QualType ASTContext::getDecltypeType(Expr *e) { 2250 DecltypeType *dt; 2251 if (e->isTypeDependent()) { 2252 llvm::FoldingSetNodeID ID; 2253 DependentDecltypeType::Profile(ID, *this, e); 2254 2255 void *InsertPos = 0; 2256 DependentDecltypeType *Canon 2257 = DependentDecltypeTypes.FindNodeOrInsertPos(ID, InsertPos); 2258 if (Canon) { 2259 // We already have a "canonical" version of an equivalent, dependent 2260 // decltype type. Use that as our canonical type. 2261 dt = new (*this, TypeAlignment) DecltypeType(e, DependentTy, 2262 QualType((DecltypeType*)Canon, 0)); 2263 } 2264 else { 2265 // Build a new, canonical typeof(expr) type. 2266 Canon = new (*this, TypeAlignment) DependentDecltypeType(*this, e); 2267 DependentDecltypeTypes.InsertNode(Canon, InsertPos); 2268 dt = Canon; 2269 } 2270 } else { 2271 QualType T = getDecltypeForExpr(e, *this); 2272 dt = new (*this, TypeAlignment) DecltypeType(e, T, getCanonicalType(T)); 2273 } 2274 Types.push_back(dt); 2275 return QualType(dt, 0); 2276} 2277 2278/// getTagDeclType - Return the unique reference to the type for the 2279/// specified TagDecl (struct/union/class/enum) decl. 2280QualType ASTContext::getTagDeclType(const TagDecl *Decl) { 2281 assert (Decl); 2282 // FIXME: What is the design on getTagDeclType when it requires casting 2283 // away const? mutable? 2284 return getTypeDeclType(const_cast<TagDecl*>(Decl)); 2285} 2286 2287/// getSizeType - Return the unique type for "size_t" (C99 7.17), the result 2288/// of the sizeof operator (C99 6.5.3.4p4). The value is target dependent and 2289/// needs to agree with the definition in <stddef.h>. 2290CanQualType ASTContext::getSizeType() const { 2291 return getFromTargetType(Target.getSizeType()); 2292} 2293 2294/// getSignedWCharType - Return the type of "signed wchar_t". 2295/// Used when in C++, as a GCC extension. 2296QualType ASTContext::getSignedWCharType() const { 2297 // FIXME: derive from "Target" ? 2298 return WCharTy; 2299} 2300 2301/// getUnsignedWCharType - Return the type of "unsigned wchar_t". 2302/// Used when in C++, as a GCC extension. 2303QualType ASTContext::getUnsignedWCharType() const { 2304 // FIXME: derive from "Target" ? 2305 return UnsignedIntTy; 2306} 2307 2308/// getPointerDiffType - Return the unique type for "ptrdiff_t" (ref?) 2309/// defined in <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9). 2310QualType ASTContext::getPointerDiffType() const { 2311 return getFromTargetType(Target.getPtrDiffType(0)); 2312} 2313 2314//===----------------------------------------------------------------------===// 2315// Type Operators 2316//===----------------------------------------------------------------------===// 2317 2318CanQualType ASTContext::getCanonicalParamType(QualType T) { 2319 // Push qualifiers into arrays, and then discard any remaining 2320 // qualifiers. 2321 T = getCanonicalType(T); 2322 const Type *Ty = T.getTypePtr(); 2323 2324 QualType Result; 2325 if (isa<ArrayType>(Ty)) { 2326 Result = getArrayDecayedType(QualType(Ty,0)); 2327 } else if (isa<FunctionType>(Ty)) { 2328 Result = getPointerType(QualType(Ty, 0)); 2329 } else { 2330 Result = QualType(Ty, 0); 2331 } 2332 2333 return CanQualType::CreateUnsafe(Result); 2334} 2335 2336/// getCanonicalType - Return the canonical (structural) type corresponding to 2337/// the specified potentially non-canonical type. The non-canonical version 2338/// of a type may have many "decorated" versions of types. Decorators can 2339/// include typedefs, 'typeof' operators, etc. The returned type is guaranteed 2340/// to be free of any of these, allowing two canonical types to be compared 2341/// for exact equality with a simple pointer comparison. 2342CanQualType ASTContext::getCanonicalType(QualType T) { 2343 QualifierCollector Quals; 2344 const Type *Ptr = Quals.strip(T); 2345 QualType CanType = Ptr->getCanonicalTypeInternal(); 2346 2347 // The canonical internal type will be the canonical type *except* 2348 // that we push type qualifiers down through array types. 2349 2350 // If there are no new qualifiers to push down, stop here. 2351 if (!Quals.hasQualifiers()) 2352 return CanQualType::CreateUnsafe(CanType); 2353 2354 // If the type qualifiers are on an array type, get the canonical 2355 // type of the array with the qualifiers applied to the element 2356 // type. 2357 ArrayType *AT = dyn_cast<ArrayType>(CanType); 2358 if (!AT) 2359 return CanQualType::CreateUnsafe(getQualifiedType(CanType, Quals)); 2360 2361 // Get the canonical version of the element with the extra qualifiers on it. 2362 // This can recursively sink qualifiers through multiple levels of arrays. 2363 QualType NewEltTy = getQualifiedType(AT->getElementType(), Quals); 2364 NewEltTy = getCanonicalType(NewEltTy); 2365 2366 if (ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 2367 return CanQualType::CreateUnsafe( 2368 getConstantArrayType(NewEltTy, CAT->getSize(), 2369 CAT->getSizeModifier(), 2370 CAT->getIndexTypeCVRQualifiers())); 2371 if (IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(AT)) 2372 return CanQualType::CreateUnsafe( 2373 getIncompleteArrayType(NewEltTy, IAT->getSizeModifier(), 2374 IAT->getIndexTypeCVRQualifiers())); 2375 2376 if (DependentSizedArrayType *DSAT = dyn_cast<DependentSizedArrayType>(AT)) 2377 return CanQualType::CreateUnsafe( 2378 getDependentSizedArrayType(NewEltTy, 2379 DSAT->getSizeExpr() ? 2380 DSAT->getSizeExpr()->Retain() : 0, 2381 DSAT->getSizeModifier(), 2382 DSAT->getIndexTypeCVRQualifiers(), 2383 DSAT->getBracketsRange())->getCanonicalTypeInternal()); 2384 2385 VariableArrayType *VAT = cast<VariableArrayType>(AT); 2386 return CanQualType::CreateUnsafe(getVariableArrayType(NewEltTy, 2387 VAT->getSizeExpr() ? 2388 VAT->getSizeExpr()->Retain() : 0, 2389 VAT->getSizeModifier(), 2390 VAT->getIndexTypeCVRQualifiers(), 2391 VAT->getBracketsRange())); 2392} 2393 2394QualType ASTContext::getUnqualifiedArrayType(QualType T, 2395 Qualifiers &Quals) { 2396 Quals = T.getQualifiers(); 2397 if (!isa<ArrayType>(T)) { 2398 return T.getUnqualifiedType(); 2399 } 2400 2401 const ArrayType *AT = cast<ArrayType>(T); 2402 QualType Elt = AT->getElementType(); 2403 QualType UnqualElt = getUnqualifiedArrayType(Elt, Quals); 2404 if (Elt == UnqualElt) 2405 return T; 2406 2407 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(T)) { 2408 return getConstantArrayType(UnqualElt, CAT->getSize(), 2409 CAT->getSizeModifier(), 0); 2410 } 2411 2412 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(T)) { 2413 return getIncompleteArrayType(UnqualElt, IAT->getSizeModifier(), 0); 2414 } 2415 2416 const DependentSizedArrayType *DSAT = cast<DependentSizedArrayType>(T); 2417 return getDependentSizedArrayType(UnqualElt, DSAT->getSizeExpr()->Retain(), 2418 DSAT->getSizeModifier(), 0, 2419 SourceRange()); 2420} 2421 2422DeclarationName ASTContext::getNameForTemplate(TemplateName Name) { 2423 if (TemplateDecl *TD = Name.getAsTemplateDecl()) 2424 return TD->getDeclName(); 2425 2426 if (DependentTemplateName *DTN = Name.getAsDependentTemplateName()) { 2427 if (DTN->isIdentifier()) { 2428 return DeclarationNames.getIdentifier(DTN->getIdentifier()); 2429 } else { 2430 return DeclarationNames.getCXXOperatorName(DTN->getOperator()); 2431 } 2432 } 2433 2434 OverloadedTemplateStorage *Storage = Name.getAsOverloadedTemplate(); 2435 assert(Storage); 2436 return (*Storage->begin())->getDeclName(); 2437} 2438 2439TemplateName ASTContext::getCanonicalTemplateName(TemplateName Name) { 2440 // If this template name refers to a template, the canonical 2441 // template name merely stores the template itself. 2442 if (TemplateDecl *Template = Name.getAsTemplateDecl()) 2443 return TemplateName(cast<TemplateDecl>(Template->getCanonicalDecl())); 2444 2445 assert(!Name.getAsOverloadedTemplate()); 2446 2447 DependentTemplateName *DTN = Name.getAsDependentTemplateName(); 2448 assert(DTN && "Non-dependent template names must refer to template decls."); 2449 return DTN->CanonicalTemplateName; 2450} 2451 2452bool ASTContext::hasSameTemplateName(TemplateName X, TemplateName Y) { 2453 X = getCanonicalTemplateName(X); 2454 Y = getCanonicalTemplateName(Y); 2455 return X.getAsVoidPointer() == Y.getAsVoidPointer(); 2456} 2457 2458TemplateArgument 2459ASTContext::getCanonicalTemplateArgument(const TemplateArgument &Arg) { 2460 switch (Arg.getKind()) { 2461 case TemplateArgument::Null: 2462 return Arg; 2463 2464 case TemplateArgument::Expression: 2465 return Arg; 2466 2467 case TemplateArgument::Declaration: 2468 return TemplateArgument(Arg.getAsDecl()->getCanonicalDecl()); 2469 2470 case TemplateArgument::Template: 2471 return TemplateArgument(getCanonicalTemplateName(Arg.getAsTemplate())); 2472 2473 case TemplateArgument::Integral: 2474 return TemplateArgument(*Arg.getAsIntegral(), 2475 getCanonicalType(Arg.getIntegralType())); 2476 2477 case TemplateArgument::Type: 2478 return TemplateArgument(getCanonicalType(Arg.getAsType())); 2479 2480 case TemplateArgument::Pack: { 2481 // FIXME: Allocate in ASTContext 2482 TemplateArgument *CanonArgs = new TemplateArgument[Arg.pack_size()]; 2483 unsigned Idx = 0; 2484 for (TemplateArgument::pack_iterator A = Arg.pack_begin(), 2485 AEnd = Arg.pack_end(); 2486 A != AEnd; (void)++A, ++Idx) 2487 CanonArgs[Idx] = getCanonicalTemplateArgument(*A); 2488 2489 TemplateArgument Result; 2490 Result.setArgumentPack(CanonArgs, Arg.pack_size(), false); 2491 return Result; 2492 } 2493 } 2494 2495 // Silence GCC warning 2496 assert(false && "Unhandled template argument kind"); 2497 return TemplateArgument(); 2498} 2499 2500NestedNameSpecifier * 2501ASTContext::getCanonicalNestedNameSpecifier(NestedNameSpecifier *NNS) { 2502 if (!NNS) 2503 return 0; 2504 2505 switch (NNS->getKind()) { 2506 case NestedNameSpecifier::Identifier: 2507 // Canonicalize the prefix but keep the identifier the same. 2508 return NestedNameSpecifier::Create(*this, 2509 getCanonicalNestedNameSpecifier(NNS->getPrefix()), 2510 NNS->getAsIdentifier()); 2511 2512 case NestedNameSpecifier::Namespace: 2513 // A namespace is canonical; build a nested-name-specifier with 2514 // this namespace and no prefix. 2515 return NestedNameSpecifier::Create(*this, 0, NNS->getAsNamespace()); 2516 2517 case NestedNameSpecifier::TypeSpec: 2518 case NestedNameSpecifier::TypeSpecWithTemplate: { 2519 QualType T = getCanonicalType(QualType(NNS->getAsType(), 0)); 2520 return NestedNameSpecifier::Create(*this, 0, 2521 NNS->getKind() == NestedNameSpecifier::TypeSpecWithTemplate, 2522 T.getTypePtr()); 2523 } 2524 2525 case NestedNameSpecifier::Global: 2526 // The global specifier is canonical and unique. 2527 return NNS; 2528 } 2529 2530 // Required to silence a GCC warning 2531 return 0; 2532} 2533 2534 2535const ArrayType *ASTContext::getAsArrayType(QualType T) { 2536 // Handle the non-qualified case efficiently. 2537 if (!T.hasLocalQualifiers()) { 2538 // Handle the common positive case fast. 2539 if (const ArrayType *AT = dyn_cast<ArrayType>(T)) 2540 return AT; 2541 } 2542 2543 // Handle the common negative case fast. 2544 QualType CType = T->getCanonicalTypeInternal(); 2545 if (!isa<ArrayType>(CType)) 2546 return 0; 2547 2548 // Apply any qualifiers from the array type to the element type. This 2549 // implements C99 6.7.3p8: "If the specification of an array type includes 2550 // any type qualifiers, the element type is so qualified, not the array type." 2551 2552 // If we get here, we either have type qualifiers on the type, or we have 2553 // sugar such as a typedef in the way. If we have type qualifiers on the type 2554 // we must propagate them down into the element type. 2555 2556 QualifierCollector Qs; 2557 const Type *Ty = Qs.strip(T.getDesugaredType()); 2558 2559 // If we have a simple case, just return now. 2560 const ArrayType *ATy = dyn_cast<ArrayType>(Ty); 2561 if (ATy == 0 || Qs.empty()) 2562 return ATy; 2563 2564 // Otherwise, we have an array and we have qualifiers on it. Push the 2565 // qualifiers into the array element type and return a new array type. 2566 // Get the canonical version of the element with the extra qualifiers on it. 2567 // This can recursively sink qualifiers through multiple levels of arrays. 2568 QualType NewEltTy = getQualifiedType(ATy->getElementType(), Qs); 2569 2570 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(ATy)) 2571 return cast<ArrayType>(getConstantArrayType(NewEltTy, CAT->getSize(), 2572 CAT->getSizeModifier(), 2573 CAT->getIndexTypeCVRQualifiers())); 2574 if (const IncompleteArrayType *IAT = dyn_cast<IncompleteArrayType>(ATy)) 2575 return cast<ArrayType>(getIncompleteArrayType(NewEltTy, 2576 IAT->getSizeModifier(), 2577 IAT->getIndexTypeCVRQualifiers())); 2578 2579 if (const DependentSizedArrayType *DSAT 2580 = dyn_cast<DependentSizedArrayType>(ATy)) 2581 return cast<ArrayType>( 2582 getDependentSizedArrayType(NewEltTy, 2583 DSAT->getSizeExpr() ? 2584 DSAT->getSizeExpr()->Retain() : 0, 2585 DSAT->getSizeModifier(), 2586 DSAT->getIndexTypeCVRQualifiers(), 2587 DSAT->getBracketsRange())); 2588 2589 const VariableArrayType *VAT = cast<VariableArrayType>(ATy); 2590 return cast<ArrayType>(getVariableArrayType(NewEltTy, 2591 VAT->getSizeExpr() ? 2592 VAT->getSizeExpr()->Retain() : 0, 2593 VAT->getSizeModifier(), 2594 VAT->getIndexTypeCVRQualifiers(), 2595 VAT->getBracketsRange())); 2596} 2597 2598 2599/// getArrayDecayedType - Return the properly qualified result of decaying the 2600/// specified array type to a pointer. This operation is non-trivial when 2601/// handling typedefs etc. The canonical type of "T" must be an array type, 2602/// this returns a pointer to a properly qualified element of the array. 2603/// 2604/// See C99 6.7.5.3p7 and C99 6.3.2.1p3. 2605QualType ASTContext::getArrayDecayedType(QualType Ty) { 2606 // Get the element type with 'getAsArrayType' so that we don't lose any 2607 // typedefs in the element type of the array. This also handles propagation 2608 // of type qualifiers from the array type into the element type if present 2609 // (C99 6.7.3p8). 2610 const ArrayType *PrettyArrayType = getAsArrayType(Ty); 2611 assert(PrettyArrayType && "Not an array type!"); 2612 2613 QualType PtrTy = getPointerType(PrettyArrayType->getElementType()); 2614 2615 // int x[restrict 4] -> int *restrict 2616 return getQualifiedType(PtrTy, PrettyArrayType->getIndexTypeQualifiers()); 2617} 2618 2619QualType ASTContext::getBaseElementType(QualType QT) { 2620 QualifierCollector Qs; 2621 while (true) { 2622 const Type *UT = Qs.strip(QT); 2623 if (const ArrayType *AT = getAsArrayType(QualType(UT,0))) { 2624 QT = AT->getElementType(); 2625 } else { 2626 return Qs.apply(QT); 2627 } 2628 } 2629} 2630 2631QualType ASTContext::getBaseElementType(const ArrayType *AT) { 2632 QualType ElemTy = AT->getElementType(); 2633 2634 if (const ArrayType *AT = getAsArrayType(ElemTy)) 2635 return getBaseElementType(AT); 2636 2637 return ElemTy; 2638} 2639 2640/// getConstantArrayElementCount - Returns number of constant array elements. 2641uint64_t 2642ASTContext::getConstantArrayElementCount(const ConstantArrayType *CA) const { 2643 uint64_t ElementCount = 1; 2644 do { 2645 ElementCount *= CA->getSize().getZExtValue(); 2646 CA = dyn_cast<ConstantArrayType>(CA->getElementType()); 2647 } while (CA); 2648 return ElementCount; 2649} 2650 2651/// getFloatingRank - Return a relative rank for floating point types. 2652/// This routine will assert if passed a built-in type that isn't a float. 2653static FloatingRank getFloatingRank(QualType T) { 2654 if (const ComplexType *CT = T->getAs<ComplexType>()) 2655 return getFloatingRank(CT->getElementType()); 2656 2657 assert(T->getAs<BuiltinType>() && "getFloatingRank(): not a floating type"); 2658 switch (T->getAs<BuiltinType>()->getKind()) { 2659 default: assert(0 && "getFloatingRank(): not a floating type"); 2660 case BuiltinType::Float: return FloatRank; 2661 case BuiltinType::Double: return DoubleRank; 2662 case BuiltinType::LongDouble: return LongDoubleRank; 2663 } 2664} 2665 2666/// getFloatingTypeOfSizeWithinDomain - Returns a real floating 2667/// point or a complex type (based on typeDomain/typeSize). 2668/// 'typeDomain' is a real floating point or complex type. 2669/// 'typeSize' is a real floating point or complex type. 2670QualType ASTContext::getFloatingTypeOfSizeWithinDomain(QualType Size, 2671 QualType Domain) const { 2672 FloatingRank EltRank = getFloatingRank(Size); 2673 if (Domain->isComplexType()) { 2674 switch (EltRank) { 2675 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2676 case FloatRank: return FloatComplexTy; 2677 case DoubleRank: return DoubleComplexTy; 2678 case LongDoubleRank: return LongDoubleComplexTy; 2679 } 2680 } 2681 2682 assert(Domain->isRealFloatingType() && "Unknown domain!"); 2683 switch (EltRank) { 2684 default: assert(0 && "getFloatingRank(): illegal value for rank"); 2685 case FloatRank: return FloatTy; 2686 case DoubleRank: return DoubleTy; 2687 case LongDoubleRank: return LongDoubleTy; 2688 } 2689} 2690 2691/// getFloatingTypeOrder - Compare the rank of the two specified floating 2692/// point types, ignoring the domain of the type (i.e. 'double' == 2693/// '_Complex double'). If LHS > RHS, return 1. If LHS == RHS, return 0. If 2694/// LHS < RHS, return -1. 2695int ASTContext::getFloatingTypeOrder(QualType LHS, QualType RHS) { 2696 FloatingRank LHSR = getFloatingRank(LHS); 2697 FloatingRank RHSR = getFloatingRank(RHS); 2698 2699 if (LHSR == RHSR) 2700 return 0; 2701 if (LHSR > RHSR) 2702 return 1; 2703 return -1; 2704} 2705 2706/// getIntegerRank - Return an integer conversion rank (C99 6.3.1.1p1). This 2707/// routine will assert if passed a built-in type that isn't an integer or enum, 2708/// or if it is not canonicalized. 2709unsigned ASTContext::getIntegerRank(Type *T) { 2710 assert(T->isCanonicalUnqualified() && "T should be canonicalized"); 2711 if (EnumType* ET = dyn_cast<EnumType>(T)) 2712 T = ET->getDecl()->getPromotionType().getTypePtr(); 2713 2714 if (T->isSpecificBuiltinType(BuiltinType::WChar)) 2715 T = getFromTargetType(Target.getWCharType()).getTypePtr(); 2716 2717 if (T->isSpecificBuiltinType(BuiltinType::Char16)) 2718 T = getFromTargetType(Target.getChar16Type()).getTypePtr(); 2719 2720 if (T->isSpecificBuiltinType(BuiltinType::Char32)) 2721 T = getFromTargetType(Target.getChar32Type()).getTypePtr(); 2722 2723 switch (cast<BuiltinType>(T)->getKind()) { 2724 default: assert(0 && "getIntegerRank(): not a built-in integer"); 2725 case BuiltinType::Bool: 2726 return 1 + (getIntWidth(BoolTy) << 3); 2727 case BuiltinType::Char_S: 2728 case BuiltinType::Char_U: 2729 case BuiltinType::SChar: 2730 case BuiltinType::UChar: 2731 return 2 + (getIntWidth(CharTy) << 3); 2732 case BuiltinType::Short: 2733 case BuiltinType::UShort: 2734 return 3 + (getIntWidth(ShortTy) << 3); 2735 case BuiltinType::Int: 2736 case BuiltinType::UInt: 2737 return 4 + (getIntWidth(IntTy) << 3); 2738 case BuiltinType::Long: 2739 case BuiltinType::ULong: 2740 return 5 + (getIntWidth(LongTy) << 3); 2741 case BuiltinType::LongLong: 2742 case BuiltinType::ULongLong: 2743 return 6 + (getIntWidth(LongLongTy) << 3); 2744 case BuiltinType::Int128: 2745 case BuiltinType::UInt128: 2746 return 7 + (getIntWidth(Int128Ty) << 3); 2747 } 2748} 2749 2750/// \brief Whether this is a promotable bitfield reference according 2751/// to C99 6.3.1.1p2, bullet 2 (and GCC extensions). 2752/// 2753/// \returns the type this bit-field will promote to, or NULL if no 2754/// promotion occurs. 2755QualType ASTContext::isPromotableBitField(Expr *E) { 2756 FieldDecl *Field = E->getBitField(); 2757 if (!Field) 2758 return QualType(); 2759 2760 QualType FT = Field->getType(); 2761 2762 llvm::APSInt BitWidthAP = Field->getBitWidth()->EvaluateAsInt(*this); 2763 uint64_t BitWidth = BitWidthAP.getZExtValue(); 2764 uint64_t IntSize = getTypeSize(IntTy); 2765 // GCC extension compatibility: if the bit-field size is less than or equal 2766 // to the size of int, it gets promoted no matter what its type is. 2767 // For instance, unsigned long bf : 4 gets promoted to signed int. 2768 if (BitWidth < IntSize) 2769 return IntTy; 2770 2771 if (BitWidth == IntSize) 2772 return FT->isSignedIntegerType() ? IntTy : UnsignedIntTy; 2773 2774 // Types bigger than int are not subject to promotions, and therefore act 2775 // like the base type. 2776 // FIXME: This doesn't quite match what gcc does, but what gcc does here 2777 // is ridiculous. 2778 return QualType(); 2779} 2780 2781/// getPromotedIntegerType - Returns the type that Promotable will 2782/// promote to: C99 6.3.1.1p2, assuming that Promotable is a promotable 2783/// integer type. 2784QualType ASTContext::getPromotedIntegerType(QualType Promotable) { 2785 assert(!Promotable.isNull()); 2786 assert(Promotable->isPromotableIntegerType()); 2787 if (const EnumType *ET = Promotable->getAs<EnumType>()) 2788 return ET->getDecl()->getPromotionType(); 2789 if (Promotable->isSignedIntegerType()) 2790 return IntTy; 2791 uint64_t PromotableSize = getTypeSize(Promotable); 2792 uint64_t IntSize = getTypeSize(IntTy); 2793 assert(Promotable->isUnsignedIntegerType() && PromotableSize <= IntSize); 2794 return (PromotableSize != IntSize) ? IntTy : UnsignedIntTy; 2795} 2796 2797/// getIntegerTypeOrder - Returns the highest ranked integer type: 2798/// C99 6.3.1.8p1. If LHS > RHS, return 1. If LHS == RHS, return 0. If 2799/// LHS < RHS, return -1. 2800int ASTContext::getIntegerTypeOrder(QualType LHS, QualType RHS) { 2801 Type *LHSC = getCanonicalType(LHS).getTypePtr(); 2802 Type *RHSC = getCanonicalType(RHS).getTypePtr(); 2803 if (LHSC == RHSC) return 0; 2804 2805 bool LHSUnsigned = LHSC->isUnsignedIntegerType(); 2806 bool RHSUnsigned = RHSC->isUnsignedIntegerType(); 2807 2808 unsigned LHSRank = getIntegerRank(LHSC); 2809 unsigned RHSRank = getIntegerRank(RHSC); 2810 2811 if (LHSUnsigned == RHSUnsigned) { // Both signed or both unsigned. 2812 if (LHSRank == RHSRank) return 0; 2813 return LHSRank > RHSRank ? 1 : -1; 2814 } 2815 2816 // Otherwise, the LHS is signed and the RHS is unsigned or visa versa. 2817 if (LHSUnsigned) { 2818 // If the unsigned [LHS] type is larger, return it. 2819 if (LHSRank >= RHSRank) 2820 return 1; 2821 2822 // If the signed type can represent all values of the unsigned type, it 2823 // wins. Because we are dealing with 2's complement and types that are 2824 // powers of two larger than each other, this is always safe. 2825 return -1; 2826 } 2827 2828 // If the unsigned [RHS] type is larger, return it. 2829 if (RHSRank >= LHSRank) 2830 return -1; 2831 2832 // If the signed type can represent all values of the unsigned type, it 2833 // wins. Because we are dealing with 2's complement and types that are 2834 // powers of two larger than each other, this is always safe. 2835 return 1; 2836} 2837 2838static RecordDecl * 2839CreateRecordDecl(ASTContext &Ctx, RecordDecl::TagKind TK, DeclContext *DC, 2840 SourceLocation L, IdentifierInfo *Id) { 2841 if (Ctx.getLangOptions().CPlusPlus) 2842 return CXXRecordDecl::Create(Ctx, TK, DC, L, Id); 2843 else 2844 return RecordDecl::Create(Ctx, TK, DC, L, Id); 2845} 2846 2847// getCFConstantStringType - Return the type used for constant CFStrings. 2848QualType ASTContext::getCFConstantStringType() { 2849 if (!CFConstantStringTypeDecl) { 2850 CFConstantStringTypeDecl = 2851 CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 2852 &Idents.get("NSConstantString")); 2853 CFConstantStringTypeDecl->startDefinition(); 2854 2855 QualType FieldTypes[4]; 2856 2857 // const int *isa; 2858 FieldTypes[0] = getPointerType(IntTy.withConst()); 2859 // int flags; 2860 FieldTypes[1] = IntTy; 2861 // const char *str; 2862 FieldTypes[2] = getPointerType(CharTy.withConst()); 2863 // long length; 2864 FieldTypes[3] = LongTy; 2865 2866 // Create fields 2867 for (unsigned i = 0; i < 4; ++i) { 2868 FieldDecl *Field = FieldDecl::Create(*this, CFConstantStringTypeDecl, 2869 SourceLocation(), 0, 2870 FieldTypes[i], /*TInfo=*/0, 2871 /*BitWidth=*/0, 2872 /*Mutable=*/false); 2873 CFConstantStringTypeDecl->addDecl(Field); 2874 } 2875 2876 CFConstantStringTypeDecl->completeDefinition(); 2877 } 2878 2879 return getTagDeclType(CFConstantStringTypeDecl); 2880} 2881 2882void ASTContext::setCFConstantStringType(QualType T) { 2883 const RecordType *Rec = T->getAs<RecordType>(); 2884 assert(Rec && "Invalid CFConstantStringType"); 2885 CFConstantStringTypeDecl = Rec->getDecl(); 2886} 2887 2888QualType ASTContext::getObjCFastEnumerationStateType() { 2889 if (!ObjCFastEnumerationStateTypeDecl) { 2890 ObjCFastEnumerationStateTypeDecl = 2891 CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 2892 &Idents.get("__objcFastEnumerationState")); 2893 ObjCFastEnumerationStateTypeDecl->startDefinition(); 2894 2895 QualType FieldTypes[] = { 2896 UnsignedLongTy, 2897 getPointerType(ObjCIdTypedefType), 2898 getPointerType(UnsignedLongTy), 2899 getConstantArrayType(UnsignedLongTy, 2900 llvm::APInt(32, 5), ArrayType::Normal, 0) 2901 }; 2902 2903 for (size_t i = 0; i < 4; ++i) { 2904 FieldDecl *Field = FieldDecl::Create(*this, 2905 ObjCFastEnumerationStateTypeDecl, 2906 SourceLocation(), 0, 2907 FieldTypes[i], /*TInfo=*/0, 2908 /*BitWidth=*/0, 2909 /*Mutable=*/false); 2910 ObjCFastEnumerationStateTypeDecl->addDecl(Field); 2911 } 2912 2913 ObjCFastEnumerationStateTypeDecl->completeDefinition(); 2914 } 2915 2916 return getTagDeclType(ObjCFastEnumerationStateTypeDecl); 2917} 2918 2919QualType ASTContext::getBlockDescriptorType() { 2920 if (BlockDescriptorType) 2921 return getTagDeclType(BlockDescriptorType); 2922 2923 RecordDecl *T; 2924 // FIXME: Needs the FlagAppleBlock bit. 2925 T = CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 2926 &Idents.get("__block_descriptor")); 2927 T->startDefinition(); 2928 2929 QualType FieldTypes[] = { 2930 UnsignedLongTy, 2931 UnsignedLongTy, 2932 }; 2933 2934 const char *FieldNames[] = { 2935 "reserved", 2936 "Size" 2937 }; 2938 2939 for (size_t i = 0; i < 2; ++i) { 2940 FieldDecl *Field = FieldDecl::Create(*this, 2941 T, 2942 SourceLocation(), 2943 &Idents.get(FieldNames[i]), 2944 FieldTypes[i], /*TInfo=*/0, 2945 /*BitWidth=*/0, 2946 /*Mutable=*/false); 2947 T->addDecl(Field); 2948 } 2949 2950 T->completeDefinition(); 2951 2952 BlockDescriptorType = T; 2953 2954 return getTagDeclType(BlockDescriptorType); 2955} 2956 2957void ASTContext::setBlockDescriptorType(QualType T) { 2958 const RecordType *Rec = T->getAs<RecordType>(); 2959 assert(Rec && "Invalid BlockDescriptorType"); 2960 BlockDescriptorType = Rec->getDecl(); 2961} 2962 2963QualType ASTContext::getBlockDescriptorExtendedType() { 2964 if (BlockDescriptorExtendedType) 2965 return getTagDeclType(BlockDescriptorExtendedType); 2966 2967 RecordDecl *T; 2968 // FIXME: Needs the FlagAppleBlock bit. 2969 T = CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 2970 &Idents.get("__block_descriptor_withcopydispose")); 2971 T->startDefinition(); 2972 2973 QualType FieldTypes[] = { 2974 UnsignedLongTy, 2975 UnsignedLongTy, 2976 getPointerType(VoidPtrTy), 2977 getPointerType(VoidPtrTy) 2978 }; 2979 2980 const char *FieldNames[] = { 2981 "reserved", 2982 "Size", 2983 "CopyFuncPtr", 2984 "DestroyFuncPtr" 2985 }; 2986 2987 for (size_t i = 0; i < 4; ++i) { 2988 FieldDecl *Field = FieldDecl::Create(*this, 2989 T, 2990 SourceLocation(), 2991 &Idents.get(FieldNames[i]), 2992 FieldTypes[i], /*TInfo=*/0, 2993 /*BitWidth=*/0, 2994 /*Mutable=*/false); 2995 T->addDecl(Field); 2996 } 2997 2998 T->completeDefinition(); 2999 3000 BlockDescriptorExtendedType = T; 3001 3002 return getTagDeclType(BlockDescriptorExtendedType); 3003} 3004 3005void ASTContext::setBlockDescriptorExtendedType(QualType T) { 3006 const RecordType *Rec = T->getAs<RecordType>(); 3007 assert(Rec && "Invalid BlockDescriptorType"); 3008 BlockDescriptorExtendedType = Rec->getDecl(); 3009} 3010 3011bool ASTContext::BlockRequiresCopying(QualType Ty) { 3012 if (Ty->isBlockPointerType()) 3013 return true; 3014 if (isObjCNSObjectType(Ty)) 3015 return true; 3016 if (Ty->isObjCObjectPointerType()) 3017 return true; 3018 return false; 3019} 3020 3021QualType ASTContext::BuildByRefType(const char *DeclName, QualType Ty) { 3022 // type = struct __Block_byref_1_X { 3023 // void *__isa; 3024 // struct __Block_byref_1_X *__forwarding; 3025 // unsigned int __flags; 3026 // unsigned int __size; 3027 // void *__copy_helper; // as needed 3028 // void *__destroy_help // as needed 3029 // int X; 3030 // } * 3031 3032 bool HasCopyAndDispose = BlockRequiresCopying(Ty); 3033 3034 // FIXME: Move up 3035 static unsigned int UniqueBlockByRefTypeID = 0; 3036 llvm::SmallString<36> Name; 3037 llvm::raw_svector_ostream(Name) << "__Block_byref_" << 3038 ++UniqueBlockByRefTypeID << '_' << DeclName; 3039 RecordDecl *T; 3040 T = CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 3041 &Idents.get(Name.str())); 3042 T->startDefinition(); 3043 QualType Int32Ty = IntTy; 3044 assert(getIntWidth(IntTy) == 32 && "non-32bit int not supported"); 3045 QualType FieldTypes[] = { 3046 getPointerType(VoidPtrTy), 3047 getPointerType(getTagDeclType(T)), 3048 Int32Ty, 3049 Int32Ty, 3050 getPointerType(VoidPtrTy), 3051 getPointerType(VoidPtrTy), 3052 Ty 3053 }; 3054 3055 const char *FieldNames[] = { 3056 "__isa", 3057 "__forwarding", 3058 "__flags", 3059 "__size", 3060 "__copy_helper", 3061 "__destroy_helper", 3062 DeclName, 3063 }; 3064 3065 for (size_t i = 0; i < 7; ++i) { 3066 if (!HasCopyAndDispose && i >=4 && i <= 5) 3067 continue; 3068 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3069 &Idents.get(FieldNames[i]), 3070 FieldTypes[i], /*TInfo=*/0, 3071 /*BitWidth=*/0, /*Mutable=*/false); 3072 T->addDecl(Field); 3073 } 3074 3075 T->completeDefinition(); 3076 3077 return getPointerType(getTagDeclType(T)); 3078} 3079 3080 3081QualType ASTContext::getBlockParmType( 3082 bool BlockHasCopyDispose, 3083 llvm::SmallVector<const Expr *, 8> &BlockDeclRefDecls) { 3084 // FIXME: Move up 3085 static unsigned int UniqueBlockParmTypeID = 0; 3086 llvm::SmallString<36> Name; 3087 llvm::raw_svector_ostream(Name) << "__block_literal_" 3088 << ++UniqueBlockParmTypeID; 3089 RecordDecl *T; 3090 T = CreateRecordDecl(*this, TagDecl::TK_struct, TUDecl, SourceLocation(), 3091 &Idents.get(Name.str())); 3092 T->startDefinition(); 3093 QualType FieldTypes[] = { 3094 getPointerType(VoidPtrTy), 3095 IntTy, 3096 IntTy, 3097 getPointerType(VoidPtrTy), 3098 (BlockHasCopyDispose ? 3099 getPointerType(getBlockDescriptorExtendedType()) : 3100 getPointerType(getBlockDescriptorType())) 3101 }; 3102 3103 const char *FieldNames[] = { 3104 "__isa", 3105 "__flags", 3106 "__reserved", 3107 "__FuncPtr", 3108 "__descriptor" 3109 }; 3110 3111 for (size_t i = 0; i < 5; ++i) { 3112 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3113 &Idents.get(FieldNames[i]), 3114 FieldTypes[i], /*TInfo=*/0, 3115 /*BitWidth=*/0, /*Mutable=*/false); 3116 T->addDecl(Field); 3117 } 3118 3119 for (size_t i = 0; i < BlockDeclRefDecls.size(); ++i) { 3120 const Expr *E = BlockDeclRefDecls[i]; 3121 const BlockDeclRefExpr *BDRE = dyn_cast<BlockDeclRefExpr>(E); 3122 clang::IdentifierInfo *Name = 0; 3123 if (BDRE) { 3124 const ValueDecl *D = BDRE->getDecl(); 3125 Name = &Idents.get(D->getName()); 3126 } 3127 QualType FieldType = E->getType(); 3128 3129 if (BDRE && BDRE->isByRef()) 3130 FieldType = BuildByRefType(BDRE->getDecl()->getNameAsCString(), 3131 FieldType); 3132 3133 FieldDecl *Field = FieldDecl::Create(*this, T, SourceLocation(), 3134 Name, FieldType, /*TInfo=*/0, 3135 /*BitWidth=*/0, /*Mutable=*/false); 3136 T->addDecl(Field); 3137 } 3138 3139 T->completeDefinition(); 3140 3141 return getPointerType(getTagDeclType(T)); 3142} 3143 3144void ASTContext::setObjCFastEnumerationStateType(QualType T) { 3145 const RecordType *Rec = T->getAs<RecordType>(); 3146 assert(Rec && "Invalid ObjCFAstEnumerationStateType"); 3147 ObjCFastEnumerationStateTypeDecl = Rec->getDecl(); 3148} 3149 3150// This returns true if a type has been typedefed to BOOL: 3151// typedef <type> BOOL; 3152static bool isTypeTypedefedAsBOOL(QualType T) { 3153 if (const TypedefType *TT = dyn_cast<TypedefType>(T)) 3154 if (IdentifierInfo *II = TT->getDecl()->getIdentifier()) 3155 return II->isStr("BOOL"); 3156 3157 return false; 3158} 3159 3160/// getObjCEncodingTypeSize returns size of type for objective-c encoding 3161/// purpose. 3162CharUnits ASTContext::getObjCEncodingTypeSize(QualType type) { 3163 CharUnits sz = getTypeSizeInChars(type); 3164 3165 // Make all integer and enum types at least as large as an int 3166 if (sz.isPositive() && type->isIntegralType()) 3167 sz = std::max(sz, getTypeSizeInChars(IntTy)); 3168 // Treat arrays as pointers, since that's how they're passed in. 3169 else if (type->isArrayType()) 3170 sz = getTypeSizeInChars(VoidPtrTy); 3171 return sz; 3172} 3173 3174static inline 3175std::string charUnitsToString(const CharUnits &CU) { 3176 return llvm::itostr(CU.getQuantity()); 3177} 3178 3179/// getObjCEncodingForBlockDecl - Return the encoded type for this method 3180/// declaration. 3181void ASTContext::getObjCEncodingForBlock(const BlockExpr *Expr, 3182 std::string& S) { 3183 const BlockDecl *Decl = Expr->getBlockDecl(); 3184 QualType BlockTy = 3185 Expr->getType()->getAs<BlockPointerType>()->getPointeeType(); 3186 // Encode result type. 3187 getObjCEncodingForType(cast<FunctionType>(BlockTy)->getResultType(), S); 3188 // Compute size of all parameters. 3189 // Start with computing size of a pointer in number of bytes. 3190 // FIXME: There might(should) be a better way of doing this computation! 3191 SourceLocation Loc; 3192 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3193 CharUnits ParmOffset = PtrSize; 3194 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3195 E = Decl->param_end(); PI != E; ++PI) { 3196 QualType PType = (*PI)->getType(); 3197 CharUnits sz = getObjCEncodingTypeSize(PType); 3198 assert (sz.isPositive() && "BlockExpr - Incomplete param type"); 3199 ParmOffset += sz; 3200 } 3201 // Size of the argument frame 3202 S += charUnitsToString(ParmOffset); 3203 // Block pointer and offset. 3204 S += "@?0"; 3205 ParmOffset = PtrSize; 3206 3207 // Argument types. 3208 ParmOffset = PtrSize; 3209 for (BlockDecl::param_const_iterator PI = Decl->param_begin(), E = 3210 Decl->param_end(); PI != E; ++PI) { 3211 ParmVarDecl *PVDecl = *PI; 3212 QualType PType = PVDecl->getOriginalType(); 3213 if (const ArrayType *AT = 3214 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3215 // Use array's original type only if it has known number of 3216 // elements. 3217 if (!isa<ConstantArrayType>(AT)) 3218 PType = PVDecl->getType(); 3219 } else if (PType->isFunctionType()) 3220 PType = PVDecl->getType(); 3221 getObjCEncodingForType(PType, S); 3222 S += charUnitsToString(ParmOffset); 3223 ParmOffset += getObjCEncodingTypeSize(PType); 3224 } 3225} 3226 3227/// getObjCEncodingForMethodDecl - Return the encoded type for this method 3228/// declaration. 3229void ASTContext::getObjCEncodingForMethodDecl(const ObjCMethodDecl *Decl, 3230 std::string& S) { 3231 // FIXME: This is not very efficient. 3232 // Encode type qualifer, 'in', 'inout', etc. for the return type. 3233 getObjCEncodingForTypeQualifier(Decl->getObjCDeclQualifier(), S); 3234 // Encode result type. 3235 getObjCEncodingForType(Decl->getResultType(), S); 3236 // Compute size of all parameters. 3237 // Start with computing size of a pointer in number of bytes. 3238 // FIXME: There might(should) be a better way of doing this computation! 3239 SourceLocation Loc; 3240 CharUnits PtrSize = getTypeSizeInChars(VoidPtrTy); 3241 // The first two arguments (self and _cmd) are pointers; account for 3242 // their size. 3243 CharUnits ParmOffset = 2 * PtrSize; 3244 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3245 E = Decl->param_end(); PI != E; ++PI) { 3246 QualType PType = (*PI)->getType(); 3247 CharUnits sz = getObjCEncodingTypeSize(PType); 3248 assert (sz.isPositive() && 3249 "getObjCEncodingForMethodDecl - Incomplete param type"); 3250 ParmOffset += sz; 3251 } 3252 S += charUnitsToString(ParmOffset); 3253 S += "@0:"; 3254 S += charUnitsToString(PtrSize); 3255 3256 // Argument types. 3257 ParmOffset = 2 * PtrSize; 3258 for (ObjCMethodDecl::param_iterator PI = Decl->param_begin(), 3259 E = Decl->param_end(); PI != E; ++PI) { 3260 ParmVarDecl *PVDecl = *PI; 3261 QualType PType = PVDecl->getOriginalType(); 3262 if (const ArrayType *AT = 3263 dyn_cast<ArrayType>(PType->getCanonicalTypeInternal())) { 3264 // Use array's original type only if it has known number of 3265 // elements. 3266 if (!isa<ConstantArrayType>(AT)) 3267 PType = PVDecl->getType(); 3268 } else if (PType->isFunctionType()) 3269 PType = PVDecl->getType(); 3270 // Process argument qualifiers for user supplied arguments; such as, 3271 // 'in', 'inout', etc. 3272 getObjCEncodingForTypeQualifier(PVDecl->getObjCDeclQualifier(), S); 3273 getObjCEncodingForType(PType, S); 3274 S += charUnitsToString(ParmOffset); 3275 ParmOffset += getObjCEncodingTypeSize(PType); 3276 } 3277} 3278 3279/// getObjCEncodingForPropertyDecl - Return the encoded type for this 3280/// property declaration. If non-NULL, Container must be either an 3281/// ObjCCategoryImplDecl or ObjCImplementationDecl; it should only be 3282/// NULL when getting encodings for protocol properties. 3283/// Property attributes are stored as a comma-delimited C string. The simple 3284/// attributes readonly and bycopy are encoded as single characters. The 3285/// parametrized attributes, getter=name, setter=name, and ivar=name, are 3286/// encoded as single characters, followed by an identifier. Property types 3287/// are also encoded as a parametrized attribute. The characters used to encode 3288/// these attributes are defined by the following enumeration: 3289/// @code 3290/// enum PropertyAttributes { 3291/// kPropertyReadOnly = 'R', // property is read-only. 3292/// kPropertyBycopy = 'C', // property is a copy of the value last assigned 3293/// kPropertyByref = '&', // property is a reference to the value last assigned 3294/// kPropertyDynamic = 'D', // property is dynamic 3295/// kPropertyGetter = 'G', // followed by getter selector name 3296/// kPropertySetter = 'S', // followed by setter selector name 3297/// kPropertyInstanceVariable = 'V' // followed by instance variable name 3298/// kPropertyType = 't' // followed by old-style type encoding. 3299/// kPropertyWeak = 'W' // 'weak' property 3300/// kPropertyStrong = 'P' // property GC'able 3301/// kPropertyNonAtomic = 'N' // property non-atomic 3302/// }; 3303/// @endcode 3304void ASTContext::getObjCEncodingForPropertyDecl(const ObjCPropertyDecl *PD, 3305 const Decl *Container, 3306 std::string& S) { 3307 // Collect information from the property implementation decl(s). 3308 bool Dynamic = false; 3309 ObjCPropertyImplDecl *SynthesizePID = 0; 3310 3311 // FIXME: Duplicated code due to poor abstraction. 3312 if (Container) { 3313 if (const ObjCCategoryImplDecl *CID = 3314 dyn_cast<ObjCCategoryImplDecl>(Container)) { 3315 for (ObjCCategoryImplDecl::propimpl_iterator 3316 i = CID->propimpl_begin(), e = CID->propimpl_end(); 3317 i != e; ++i) { 3318 ObjCPropertyImplDecl *PID = *i; 3319 if (PID->getPropertyDecl() == PD) { 3320 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3321 Dynamic = true; 3322 } else { 3323 SynthesizePID = PID; 3324 } 3325 } 3326 } 3327 } else { 3328 const ObjCImplementationDecl *OID=cast<ObjCImplementationDecl>(Container); 3329 for (ObjCCategoryImplDecl::propimpl_iterator 3330 i = OID->propimpl_begin(), e = OID->propimpl_end(); 3331 i != e; ++i) { 3332 ObjCPropertyImplDecl *PID = *i; 3333 if (PID->getPropertyDecl() == PD) { 3334 if (PID->getPropertyImplementation()==ObjCPropertyImplDecl::Dynamic) { 3335 Dynamic = true; 3336 } else { 3337 SynthesizePID = PID; 3338 } 3339 } 3340 } 3341 } 3342 } 3343 3344 // FIXME: This is not very efficient. 3345 S = "T"; 3346 3347 // Encode result type. 3348 // GCC has some special rules regarding encoding of properties which 3349 // closely resembles encoding of ivars. 3350 getObjCEncodingForTypeImpl(PD->getType(), S, true, true, 0, 3351 true /* outermost type */, 3352 true /* encoding for property */); 3353 3354 if (PD->isReadOnly()) { 3355 S += ",R"; 3356 } else { 3357 switch (PD->getSetterKind()) { 3358 case ObjCPropertyDecl::Assign: break; 3359 case ObjCPropertyDecl::Copy: S += ",C"; break; 3360 case ObjCPropertyDecl::Retain: S += ",&"; break; 3361 } 3362 } 3363 3364 // It really isn't clear at all what this means, since properties 3365 // are "dynamic by default". 3366 if (Dynamic) 3367 S += ",D"; 3368 3369 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_nonatomic) 3370 S += ",N"; 3371 3372 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_getter) { 3373 S += ",G"; 3374 S += PD->getGetterName().getAsString(); 3375 } 3376 3377 if (PD->getPropertyAttributes() & ObjCPropertyDecl::OBJC_PR_setter) { 3378 S += ",S"; 3379 S += PD->getSetterName().getAsString(); 3380 } 3381 3382 if (SynthesizePID) { 3383 const ObjCIvarDecl *OID = SynthesizePID->getPropertyIvarDecl(); 3384 S += ",V"; 3385 S += OID->getNameAsString(); 3386 } 3387 3388 // FIXME: OBJCGC: weak & strong 3389} 3390 3391/// getLegacyIntegralTypeEncoding - 3392/// Another legacy compatibility encoding: 32-bit longs are encoded as 3393/// 'l' or 'L' , but not always. For typedefs, we need to use 3394/// 'i' or 'I' instead if encoding a struct field, or a pointer! 3395/// 3396void ASTContext::getLegacyIntegralTypeEncoding (QualType &PointeeTy) const { 3397 if (isa<TypedefType>(PointeeTy.getTypePtr())) { 3398 if (const BuiltinType *BT = PointeeTy->getAs<BuiltinType>()) { 3399 if (BT->getKind() == BuiltinType::ULong && 3400 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3401 PointeeTy = UnsignedIntTy; 3402 else 3403 if (BT->getKind() == BuiltinType::Long && 3404 ((const_cast<ASTContext *>(this))->getIntWidth(PointeeTy) == 32)) 3405 PointeeTy = IntTy; 3406 } 3407 } 3408} 3409 3410void ASTContext::getObjCEncodingForType(QualType T, std::string& S, 3411 const FieldDecl *Field) { 3412 // We follow the behavior of gcc, expanding structures which are 3413 // directly pointed to, and expanding embedded structures. Note that 3414 // these rules are sufficient to prevent recursive encoding of the 3415 // same type. 3416 getObjCEncodingForTypeImpl(T, S, true, true, Field, 3417 true /* outermost type */); 3418} 3419 3420static void EncodeBitField(const ASTContext *Context, std::string& S, 3421 const FieldDecl *FD) { 3422 const Expr *E = FD->getBitWidth(); 3423 assert(E && "bitfield width not there - getObjCEncodingForTypeImpl"); 3424 ASTContext *Ctx = const_cast<ASTContext*>(Context); 3425 unsigned N = E->EvaluateAsInt(*Ctx).getZExtValue(); 3426 S += 'b'; 3427 S += llvm::utostr(N); 3428} 3429 3430// FIXME: Use SmallString for accumulating string. 3431void ASTContext::getObjCEncodingForTypeImpl(QualType T, std::string& S, 3432 bool ExpandPointedToStructures, 3433 bool ExpandStructures, 3434 const FieldDecl *FD, 3435 bool OutermostType, 3436 bool EncodingProperty) { 3437 if (const BuiltinType *BT = T->getAs<BuiltinType>()) { 3438 if (FD && FD->isBitField()) 3439 return EncodeBitField(this, S, FD); 3440 char encoding; 3441 switch (BT->getKind()) { 3442 default: assert(0 && "Unhandled builtin type kind"); 3443 case BuiltinType::Void: encoding = 'v'; break; 3444 case BuiltinType::Bool: encoding = 'B'; break; 3445 case BuiltinType::Char_U: 3446 case BuiltinType::UChar: encoding = 'C'; break; 3447 case BuiltinType::UShort: encoding = 'S'; break; 3448 case BuiltinType::UInt: encoding = 'I'; break; 3449 case BuiltinType::ULong: 3450 encoding = 3451 (const_cast<ASTContext *>(this))->getIntWidth(T) == 32 ? 'L' : 'Q'; 3452 break; 3453 case BuiltinType::UInt128: encoding = 'T'; break; 3454 case BuiltinType::ULongLong: encoding = 'Q'; break; 3455 case BuiltinType::Char_S: 3456 case BuiltinType::SChar: encoding = 'c'; break; 3457 case BuiltinType::Short: encoding = 's'; break; 3458 case BuiltinType::Int: encoding = 'i'; break; 3459 case BuiltinType::Long: 3460 encoding = 3461 (const_cast<ASTContext *>(this))->getIntWidth(T) == 32 ? 'l' : 'q'; 3462 break; 3463 case BuiltinType::LongLong: encoding = 'q'; break; 3464 case BuiltinType::Int128: encoding = 't'; break; 3465 case BuiltinType::Float: encoding = 'f'; break; 3466 case BuiltinType::Double: encoding = 'd'; break; 3467 case BuiltinType::LongDouble: encoding = 'd'; break; 3468 } 3469 3470 S += encoding; 3471 return; 3472 } 3473 3474 if (const ComplexType *CT = T->getAs<ComplexType>()) { 3475 S += 'j'; 3476 getObjCEncodingForTypeImpl(CT->getElementType(), S, false, false, 0, false, 3477 false); 3478 return; 3479 } 3480 3481 if (const PointerType *PT = T->getAs<PointerType>()) { 3482 if (PT->isObjCSelType()) { 3483 S += ':'; 3484 return; 3485 } 3486 QualType PointeeTy = PT->getPointeeType(); 3487 3488 bool isReadOnly = false; 3489 // For historical/compatibility reasons, the read-only qualifier of the 3490 // pointee gets emitted _before_ the '^'. The read-only qualifier of 3491 // the pointer itself gets ignored, _unless_ we are looking at a typedef! 3492 // Also, do not emit the 'r' for anything but the outermost type! 3493 if (isa<TypedefType>(T.getTypePtr())) { 3494 if (OutermostType && T.isConstQualified()) { 3495 isReadOnly = true; 3496 S += 'r'; 3497 } 3498 } else if (OutermostType) { 3499 QualType P = PointeeTy; 3500 while (P->getAs<PointerType>()) 3501 P = P->getAs<PointerType>()->getPointeeType(); 3502 if (P.isConstQualified()) { 3503 isReadOnly = true; 3504 S += 'r'; 3505 } 3506 } 3507 if (isReadOnly) { 3508 // Another legacy compatibility encoding. Some ObjC qualifier and type 3509 // combinations need to be rearranged. 3510 // Rewrite "in const" from "nr" to "rn" 3511 const char * s = S.c_str(); 3512 int len = S.length(); 3513 if (len >= 2 && s[len-2] == 'n' && s[len-1] == 'r') { 3514 std::string replace = "rn"; 3515 S.replace(S.end()-2, S.end(), replace); 3516 } 3517 } 3518 3519 if (PointeeTy->isCharType()) { 3520 // char pointer types should be encoded as '*' unless it is a 3521 // type that has been typedef'd to 'BOOL'. 3522 if (!isTypeTypedefedAsBOOL(PointeeTy)) { 3523 S += '*'; 3524 return; 3525 } 3526 } else if (const RecordType *RTy = PointeeTy->getAs<RecordType>()) { 3527 // GCC binary compat: Need to convert "struct objc_class *" to "#". 3528 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_class")) { 3529 S += '#'; 3530 return; 3531 } 3532 // GCC binary compat: Need to convert "struct objc_object *" to "@". 3533 if (RTy->getDecl()->getIdentifier() == &Idents.get("objc_object")) { 3534 S += '@'; 3535 return; 3536 } 3537 // fall through... 3538 } 3539 S += '^'; 3540 getLegacyIntegralTypeEncoding(PointeeTy); 3541 3542 getObjCEncodingForTypeImpl(PointeeTy, S, false, ExpandPointedToStructures, 3543 NULL); 3544 return; 3545 } 3546 3547 if (const ArrayType *AT = 3548 // Ignore type qualifiers etc. 3549 dyn_cast<ArrayType>(T->getCanonicalTypeInternal())) { 3550 if (isa<IncompleteArrayType>(AT)) { 3551 // Incomplete arrays are encoded as a pointer to the array element. 3552 S += '^'; 3553 3554 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3555 false, ExpandStructures, FD); 3556 } else { 3557 S += '['; 3558 3559 if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(AT)) 3560 S += llvm::utostr(CAT->getSize().getZExtValue()); 3561 else { 3562 //Variable length arrays are encoded as a regular array with 0 elements. 3563 assert(isa<VariableArrayType>(AT) && "Unknown array type!"); 3564 S += '0'; 3565 } 3566 3567 getObjCEncodingForTypeImpl(AT->getElementType(), S, 3568 false, ExpandStructures, FD); 3569 S += ']'; 3570 } 3571 return; 3572 } 3573 3574 if (T->getAs<FunctionType>()) { 3575 S += '?'; 3576 return; 3577 } 3578 3579 if (const RecordType *RTy = T->getAs<RecordType>()) { 3580 RecordDecl *RDecl = RTy->getDecl(); 3581 S += RDecl->isUnion() ? '(' : '{'; 3582 // Anonymous structures print as '?' 3583 if (const IdentifierInfo *II = RDecl->getIdentifier()) { 3584 S += II->getName(); 3585 } else { 3586 S += '?'; 3587 } 3588 if (ExpandStructures) { 3589 S += '='; 3590 for (RecordDecl::field_iterator Field = RDecl->field_begin(), 3591 FieldEnd = RDecl->field_end(); 3592 Field != FieldEnd; ++Field) { 3593 if (FD) { 3594 S += '"'; 3595 S += Field->getNameAsString(); 3596 S += '"'; 3597 } 3598 3599 // Special case bit-fields. 3600 if (Field->isBitField()) { 3601 getObjCEncodingForTypeImpl(Field->getType(), S, false, true, 3602 (*Field)); 3603 } else { 3604 QualType qt = Field->getType(); 3605 getLegacyIntegralTypeEncoding(qt); 3606 getObjCEncodingForTypeImpl(qt, S, false, true, 3607 FD); 3608 } 3609 } 3610 } 3611 S += RDecl->isUnion() ? ')' : '}'; 3612 return; 3613 } 3614 3615 if (T->isEnumeralType()) { 3616 if (FD && FD->isBitField()) 3617 EncodeBitField(this, S, FD); 3618 else 3619 S += 'i'; 3620 return; 3621 } 3622 3623 if (T->isBlockPointerType()) { 3624 S += "@?"; // Unlike a pointer-to-function, which is "^?". 3625 return; 3626 } 3627 3628 if (const ObjCInterfaceType *OIT = T->getAs<ObjCInterfaceType>()) { 3629 // @encode(class_name) 3630 ObjCInterfaceDecl *OI = OIT->getDecl(); 3631 S += '{'; 3632 const IdentifierInfo *II = OI->getIdentifier(); 3633 S += II->getName(); 3634 S += '='; 3635 llvm::SmallVector<FieldDecl*, 32> RecFields; 3636 CollectObjCIvars(OI, RecFields); 3637 for (unsigned i = 0, e = RecFields.size(); i != e; ++i) { 3638 if (RecFields[i]->isBitField()) 3639 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 3640 RecFields[i]); 3641 else 3642 getObjCEncodingForTypeImpl(RecFields[i]->getType(), S, false, true, 3643 FD); 3644 } 3645 S += '}'; 3646 return; 3647 } 3648 3649 if (const ObjCObjectPointerType *OPT = T->getAs<ObjCObjectPointerType>()) { 3650 if (OPT->isObjCIdType()) { 3651 S += '@'; 3652 return; 3653 } 3654 3655 if (OPT->isObjCClassType() || OPT->isObjCQualifiedClassType()) { 3656 // FIXME: Consider if we need to output qualifiers for 'Class<p>'. 3657 // Since this is a binary compatibility issue, need to consult with runtime 3658 // folks. Fortunately, this is a *very* obsure construct. 3659 S += '#'; 3660 return; 3661 } 3662 3663 if (OPT->isObjCQualifiedIdType()) { 3664 getObjCEncodingForTypeImpl(getObjCIdType(), S, 3665 ExpandPointedToStructures, 3666 ExpandStructures, FD); 3667 if (FD || EncodingProperty) { 3668 // Note that we do extended encoding of protocol qualifer list 3669 // Only when doing ivar or property encoding. 3670 S += '"'; 3671 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 3672 E = OPT->qual_end(); I != E; ++I) { 3673 S += '<'; 3674 S += (*I)->getNameAsString(); 3675 S += '>'; 3676 } 3677 S += '"'; 3678 } 3679 return; 3680 } 3681 3682 QualType PointeeTy = OPT->getPointeeType(); 3683 if (!EncodingProperty && 3684 isa<TypedefType>(PointeeTy.getTypePtr())) { 3685 // Another historical/compatibility reason. 3686 // We encode the underlying type which comes out as 3687 // {...}; 3688 S += '^'; 3689 getObjCEncodingForTypeImpl(PointeeTy, S, 3690 false, ExpandPointedToStructures, 3691 NULL); 3692 return; 3693 } 3694 3695 S += '@'; 3696 if (OPT->getInterfaceDecl() && (FD || EncodingProperty)) { 3697 S += '"'; 3698 S += OPT->getInterfaceDecl()->getIdentifier()->getName(); 3699 for (ObjCObjectPointerType::qual_iterator I = OPT->qual_begin(), 3700 E = OPT->qual_end(); I != E; ++I) { 3701 S += '<'; 3702 S += (*I)->getNameAsString(); 3703 S += '>'; 3704 } 3705 S += '"'; 3706 } 3707 return; 3708 } 3709 3710 assert(0 && "@encode for type not implemented!"); 3711} 3712 3713void ASTContext::getObjCEncodingForTypeQualifier(Decl::ObjCDeclQualifier QT, 3714 std::string& S) const { 3715 if (QT & Decl::OBJC_TQ_In) 3716 S += 'n'; 3717 if (QT & Decl::OBJC_TQ_Inout) 3718 S += 'N'; 3719 if (QT & Decl::OBJC_TQ_Out) 3720 S += 'o'; 3721 if (QT & Decl::OBJC_TQ_Bycopy) 3722 S += 'O'; 3723 if (QT & Decl::OBJC_TQ_Byref) 3724 S += 'R'; 3725 if (QT & Decl::OBJC_TQ_Oneway) 3726 S += 'V'; 3727} 3728 3729void ASTContext::setBuiltinVaListType(QualType T) { 3730 assert(BuiltinVaListType.isNull() && "__builtin_va_list type already set!"); 3731 3732 BuiltinVaListType = T; 3733} 3734 3735void ASTContext::setObjCIdType(QualType T) { 3736 ObjCIdTypedefType = T; 3737} 3738 3739void ASTContext::setObjCSelType(QualType T) { 3740 ObjCSelTypedefType = T; 3741} 3742 3743void ASTContext::setObjCProtoType(QualType QT) { 3744 ObjCProtoType = QT; 3745} 3746 3747void ASTContext::setObjCClassType(QualType T) { 3748 ObjCClassTypedefType = T; 3749} 3750 3751void ASTContext::setObjCConstantStringInterface(ObjCInterfaceDecl *Decl) { 3752 assert(ObjCConstantStringType.isNull() && 3753 "'NSConstantString' type already set!"); 3754 3755 ObjCConstantStringType = getObjCInterfaceType(Decl); 3756} 3757 3758/// \brief Retrieve the template name that corresponds to a non-empty 3759/// lookup. 3760TemplateName ASTContext::getOverloadedTemplateName(UnresolvedSetIterator Begin, 3761 UnresolvedSetIterator End) { 3762 unsigned size = End - Begin; 3763 assert(size > 1 && "set is not overloaded!"); 3764 3765 void *memory = Allocate(sizeof(OverloadedTemplateStorage) + 3766 size * sizeof(FunctionTemplateDecl*)); 3767 OverloadedTemplateStorage *OT = new(memory) OverloadedTemplateStorage(size); 3768 3769 NamedDecl **Storage = OT->getStorage(); 3770 for (UnresolvedSetIterator I = Begin; I != End; ++I) { 3771 NamedDecl *D = *I; 3772 assert(isa<FunctionTemplateDecl>(D) || 3773 (isa<UsingShadowDecl>(D) && 3774 isa<FunctionTemplateDecl>(D->getUnderlyingDecl()))); 3775 *Storage++ = D; 3776 } 3777 3778 return TemplateName(OT); 3779} 3780 3781/// \brief Retrieve the template name that represents a qualified 3782/// template name such as \c std::vector. 3783TemplateName ASTContext::getQualifiedTemplateName(NestedNameSpecifier *NNS, 3784 bool TemplateKeyword, 3785 TemplateDecl *Template) { 3786 // FIXME: Canonicalization? 3787 llvm::FoldingSetNodeID ID; 3788 QualifiedTemplateName::Profile(ID, NNS, TemplateKeyword, Template); 3789 3790 void *InsertPos = 0; 3791 QualifiedTemplateName *QTN = 3792 QualifiedTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3793 if (!QTN) { 3794 QTN = new (*this,4) QualifiedTemplateName(NNS, TemplateKeyword, Template); 3795 QualifiedTemplateNames.InsertNode(QTN, InsertPos); 3796 } 3797 3798 return TemplateName(QTN); 3799} 3800 3801/// \brief Retrieve the template name that represents a dependent 3802/// template name such as \c MetaFun::template apply. 3803TemplateName ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 3804 const IdentifierInfo *Name) { 3805 assert((!NNS || NNS->isDependent()) && 3806 "Nested name specifier must be dependent"); 3807 3808 llvm::FoldingSetNodeID ID; 3809 DependentTemplateName::Profile(ID, NNS, Name); 3810 3811 void *InsertPos = 0; 3812 DependentTemplateName *QTN = 3813 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3814 3815 if (QTN) 3816 return TemplateName(QTN); 3817 3818 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 3819 if (CanonNNS == NNS) { 3820 QTN = new (*this,4) DependentTemplateName(NNS, Name); 3821 } else { 3822 TemplateName Canon = getDependentTemplateName(CanonNNS, Name); 3823 QTN = new (*this,4) DependentTemplateName(NNS, Name, Canon); 3824 DependentTemplateName *CheckQTN = 3825 DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3826 assert(!CheckQTN && "Dependent type name canonicalization broken"); 3827 (void)CheckQTN; 3828 } 3829 3830 DependentTemplateNames.InsertNode(QTN, InsertPos); 3831 return TemplateName(QTN); 3832} 3833 3834/// \brief Retrieve the template name that represents a dependent 3835/// template name such as \c MetaFun::template operator+. 3836TemplateName 3837ASTContext::getDependentTemplateName(NestedNameSpecifier *NNS, 3838 OverloadedOperatorKind Operator) { 3839 assert((!NNS || NNS->isDependent()) && 3840 "Nested name specifier must be dependent"); 3841 3842 llvm::FoldingSetNodeID ID; 3843 DependentTemplateName::Profile(ID, NNS, Operator); 3844 3845 void *InsertPos = 0; 3846 DependentTemplateName *QTN 3847 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3848 3849 if (QTN) 3850 return TemplateName(QTN); 3851 3852 NestedNameSpecifier *CanonNNS = getCanonicalNestedNameSpecifier(NNS); 3853 if (CanonNNS == NNS) { 3854 QTN = new (*this,4) DependentTemplateName(NNS, Operator); 3855 } else { 3856 TemplateName Canon = getDependentTemplateName(CanonNNS, Operator); 3857 QTN = new (*this,4) DependentTemplateName(NNS, Operator, Canon); 3858 3859 DependentTemplateName *CheckQTN 3860 = DependentTemplateNames.FindNodeOrInsertPos(ID, InsertPos); 3861 assert(!CheckQTN && "Dependent template name canonicalization broken"); 3862 (void)CheckQTN; 3863 } 3864 3865 DependentTemplateNames.InsertNode(QTN, InsertPos); 3866 return TemplateName(QTN); 3867} 3868 3869/// getFromTargetType - Given one of the integer types provided by 3870/// TargetInfo, produce the corresponding type. The unsigned @p Type 3871/// is actually a value of type @c TargetInfo::IntType. 3872CanQualType ASTContext::getFromTargetType(unsigned Type) const { 3873 switch (Type) { 3874 case TargetInfo::NoInt: return CanQualType(); 3875 case TargetInfo::SignedShort: return ShortTy; 3876 case TargetInfo::UnsignedShort: return UnsignedShortTy; 3877 case TargetInfo::SignedInt: return IntTy; 3878 case TargetInfo::UnsignedInt: return UnsignedIntTy; 3879 case TargetInfo::SignedLong: return LongTy; 3880 case TargetInfo::UnsignedLong: return UnsignedLongTy; 3881 case TargetInfo::SignedLongLong: return LongLongTy; 3882 case TargetInfo::UnsignedLongLong: return UnsignedLongLongTy; 3883 } 3884 3885 assert(false && "Unhandled TargetInfo::IntType value"); 3886 return CanQualType(); 3887} 3888 3889//===----------------------------------------------------------------------===// 3890// Type Predicates. 3891//===----------------------------------------------------------------------===// 3892 3893/// isObjCNSObjectType - Return true if this is an NSObject object using 3894/// NSObject attribute on a c-style pointer type. 3895/// FIXME - Make it work directly on types. 3896/// FIXME: Move to Type. 3897/// 3898bool ASTContext::isObjCNSObjectType(QualType Ty) const { 3899 if (TypedefType *TDT = dyn_cast<TypedefType>(Ty)) { 3900 if (TypedefDecl *TD = TDT->getDecl()) 3901 if (TD->getAttr<ObjCNSObjectAttr>()) 3902 return true; 3903 } 3904 return false; 3905} 3906 3907/// getObjCGCAttr - Returns one of GCNone, Weak or Strong objc's 3908/// garbage collection attribute. 3909/// 3910Qualifiers::GC ASTContext::getObjCGCAttrKind(const QualType &Ty) const { 3911 Qualifiers::GC GCAttrs = Qualifiers::GCNone; 3912 if (getLangOptions().ObjC1 && 3913 getLangOptions().getGCMode() != LangOptions::NonGC) { 3914 GCAttrs = Ty.getObjCGCAttr(); 3915 // Default behavious under objective-c's gc is for objective-c pointers 3916 // (or pointers to them) be treated as though they were declared 3917 // as __strong. 3918 if (GCAttrs == Qualifiers::GCNone) { 3919 if (Ty->isObjCObjectPointerType() || Ty->isBlockPointerType()) 3920 GCAttrs = Qualifiers::Strong; 3921 else if (Ty->isPointerType()) 3922 return getObjCGCAttrKind(Ty->getAs<PointerType>()->getPointeeType()); 3923 } 3924 // Non-pointers have none gc'able attribute regardless of the attribute 3925 // set on them. 3926 else if (!Ty->isAnyPointerType() && !Ty->isBlockPointerType()) 3927 return Qualifiers::GCNone; 3928 } 3929 return GCAttrs; 3930} 3931 3932//===----------------------------------------------------------------------===// 3933// Type Compatibility Testing 3934//===----------------------------------------------------------------------===// 3935 3936/// areCompatVectorTypes - Return true if the two specified vector types are 3937/// compatible. 3938static bool areCompatVectorTypes(const VectorType *LHS, 3939 const VectorType *RHS) { 3940 assert(LHS->isCanonicalUnqualified() && RHS->isCanonicalUnqualified()); 3941 return LHS->getElementType() == RHS->getElementType() && 3942 LHS->getNumElements() == RHS->getNumElements(); 3943} 3944 3945//===----------------------------------------------------------------------===// 3946// ObjCQualifiedIdTypesAreCompatible - Compatibility testing for qualified id's. 3947//===----------------------------------------------------------------------===// 3948 3949/// ProtocolCompatibleWithProtocol - return 'true' if 'lProto' is in the 3950/// inheritance hierarchy of 'rProto'. 3951bool ASTContext::ProtocolCompatibleWithProtocol(ObjCProtocolDecl *lProto, 3952 ObjCProtocolDecl *rProto) { 3953 if (lProto == rProto) 3954 return true; 3955 for (ObjCProtocolDecl::protocol_iterator PI = rProto->protocol_begin(), 3956 E = rProto->protocol_end(); PI != E; ++PI) 3957 if (ProtocolCompatibleWithProtocol(lProto, *PI)) 3958 return true; 3959 return false; 3960} 3961 3962/// QualifiedIdConformsQualifiedId - compare id<p,...> with id<p1,...> 3963/// return true if lhs's protocols conform to rhs's protocol; false 3964/// otherwise. 3965bool ASTContext::QualifiedIdConformsQualifiedId(QualType lhs, QualType rhs) { 3966 if (lhs->isObjCQualifiedIdType() && rhs->isObjCQualifiedIdType()) 3967 return ObjCQualifiedIdTypesAreCompatible(lhs, rhs, false); 3968 return false; 3969} 3970 3971/// ObjCQualifiedIdTypesAreCompatible - We know that one of lhs/rhs is an 3972/// ObjCQualifiedIDType. 3973bool ASTContext::ObjCQualifiedIdTypesAreCompatible(QualType lhs, QualType rhs, 3974 bool compare) { 3975 // Allow id<P..> and an 'id' or void* type in all cases. 3976 if (lhs->isVoidPointerType() || 3977 lhs->isObjCIdType() || lhs->isObjCClassType()) 3978 return true; 3979 else if (rhs->isVoidPointerType() || 3980 rhs->isObjCIdType() || rhs->isObjCClassType()) 3981 return true; 3982 3983 if (const ObjCObjectPointerType *lhsQID = lhs->getAsObjCQualifiedIdType()) { 3984 const ObjCObjectPointerType *rhsOPT = rhs->getAs<ObjCObjectPointerType>(); 3985 3986 if (!rhsOPT) return false; 3987 3988 if (rhsOPT->qual_empty()) { 3989 // If the RHS is a unqualified interface pointer "NSString*", 3990 // make sure we check the class hierarchy. 3991 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 3992 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 3993 E = lhsQID->qual_end(); I != E; ++I) { 3994 // when comparing an id<P> on lhs with a static type on rhs, 3995 // see if static class implements all of id's protocols, directly or 3996 // through its super class and categories. 3997 if (!rhsID->ClassImplementsProtocol(*I, true)) 3998 return false; 3999 } 4000 } 4001 // If there are no qualifiers and no interface, we have an 'id'. 4002 return true; 4003 } 4004 // Both the right and left sides have qualifiers. 4005 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4006 E = lhsQID->qual_end(); I != E; ++I) { 4007 ObjCProtocolDecl *lhsProto = *I; 4008 bool match = false; 4009 4010 // when comparing an id<P> on lhs with a static type on rhs, 4011 // see if static class implements all of id's protocols, directly or 4012 // through its super class and categories. 4013 for (ObjCObjectPointerType::qual_iterator J = rhsOPT->qual_begin(), 4014 E = rhsOPT->qual_end(); J != E; ++J) { 4015 ObjCProtocolDecl *rhsProto = *J; 4016 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4017 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4018 match = true; 4019 break; 4020 } 4021 } 4022 // If the RHS is a qualified interface pointer "NSString<P>*", 4023 // make sure we check the class hierarchy. 4024 if (ObjCInterfaceDecl *rhsID = rhsOPT->getInterfaceDecl()) { 4025 for (ObjCObjectPointerType::qual_iterator I = lhsQID->qual_begin(), 4026 E = lhsQID->qual_end(); I != E; ++I) { 4027 // when comparing an id<P> on lhs with a static type on rhs, 4028 // see if static class implements all of id's protocols, directly or 4029 // through its super class and categories. 4030 if (rhsID->ClassImplementsProtocol(*I, true)) { 4031 match = true; 4032 break; 4033 } 4034 } 4035 } 4036 if (!match) 4037 return false; 4038 } 4039 4040 return true; 4041 } 4042 4043 const ObjCObjectPointerType *rhsQID = rhs->getAsObjCQualifiedIdType(); 4044 assert(rhsQID && "One of the LHS/RHS should be id<x>"); 4045 4046 if (const ObjCObjectPointerType *lhsOPT = 4047 lhs->getAsObjCInterfacePointerType()) { 4048 if (lhsOPT->qual_empty()) { 4049 bool match = false; 4050 if (ObjCInterfaceDecl *lhsID = lhsOPT->getInterfaceDecl()) { 4051 for (ObjCObjectPointerType::qual_iterator I = rhsQID->qual_begin(), 4052 E = rhsQID->qual_end(); I != E; ++I) { 4053 // when comparing an id<P> on lhs with a static type on rhs, 4054 // see if static class implements all of id's protocols, directly or 4055 // through its super class and categories. 4056 if (lhsID->ClassImplementsProtocol(*I, true)) { 4057 match = true; 4058 break; 4059 } 4060 } 4061 if (!match) 4062 return false; 4063 } 4064 return true; 4065 } 4066 // Both the right and left sides have qualifiers. 4067 for (ObjCObjectPointerType::qual_iterator I = lhsOPT->qual_begin(), 4068 E = lhsOPT->qual_end(); I != E; ++I) { 4069 ObjCProtocolDecl *lhsProto = *I; 4070 bool match = false; 4071 4072 // when comparing an id<P> on lhs with a static type on rhs, 4073 // see if static class implements all of id's protocols, directly or 4074 // through its super class and categories. 4075 for (ObjCObjectPointerType::qual_iterator J = rhsQID->qual_begin(), 4076 E = rhsQID->qual_end(); J != E; ++J) { 4077 ObjCProtocolDecl *rhsProto = *J; 4078 if (ProtocolCompatibleWithProtocol(lhsProto, rhsProto) || 4079 (compare && ProtocolCompatibleWithProtocol(rhsProto, lhsProto))) { 4080 match = true; 4081 break; 4082 } 4083 } 4084 if (!match) 4085 return false; 4086 } 4087 return true; 4088 } 4089 return false; 4090} 4091 4092/// canAssignObjCInterfaces - Return true if the two interface types are 4093/// compatible for assignment from RHS to LHS. This handles validation of any 4094/// protocol qualifiers on the LHS or RHS. 4095/// 4096bool ASTContext::canAssignObjCInterfaces(const ObjCObjectPointerType *LHSOPT, 4097 const ObjCObjectPointerType *RHSOPT) { 4098 // If either type represents the built-in 'id' or 'Class' types, return true. 4099 if (LHSOPT->isObjCBuiltinType() || RHSOPT->isObjCBuiltinType()) 4100 return true; 4101 4102 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 4103 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4104 QualType(RHSOPT,0), 4105 false); 4106 4107 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4108 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4109 if (LHS && RHS) // We have 2 user-defined types. 4110 return canAssignObjCInterfaces(LHS, RHS); 4111 4112 return false; 4113} 4114 4115/// canAssignObjCInterfacesInBlockPointer - This routine is specifically written 4116/// for providing type-safty for objective-c pointers used to pass/return 4117/// arguments in block literals. When passed as arguments, passing 'A*' where 4118/// 'id' is expected is not OK. Passing 'Sub *" where 'Super *" is expected is 4119/// not OK. For the return type, the opposite is not OK. 4120bool ASTContext::canAssignObjCInterfacesInBlockPointer( 4121 const ObjCObjectPointerType *LHSOPT, 4122 const ObjCObjectPointerType *RHSOPT) { 4123 if (RHSOPT->isObjCBuiltinType()) 4124 return true; 4125 4126 if (LHSOPT->isObjCBuiltinType()) { 4127 return RHSOPT->isObjCBuiltinType() || RHSOPT->isObjCQualifiedIdType(); 4128 } 4129 4130 if (LHSOPT->isObjCQualifiedIdType() || RHSOPT->isObjCQualifiedIdType()) 4131 return ObjCQualifiedIdTypesAreCompatible(QualType(LHSOPT,0), 4132 QualType(RHSOPT,0), 4133 false); 4134 4135 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4136 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4137 if (LHS && RHS) { // We have 2 user-defined types. 4138 if (LHS != RHS) { 4139 if (LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 4140 return false; 4141 if (RHS->getDecl()->isSuperClassOf(LHS->getDecl())) 4142 return true; 4143 } 4144 else 4145 return true; 4146 } 4147 return false; 4148} 4149 4150/// getIntersectionOfProtocols - This routine finds the intersection of set 4151/// of protocols inherited from two distinct objective-c pointer objects. 4152/// It is used to build composite qualifier list of the composite type of 4153/// the conditional expression involving two objective-c pointer objects. 4154static 4155void getIntersectionOfProtocols(ASTContext &Context, 4156 const ObjCObjectPointerType *LHSOPT, 4157 const ObjCObjectPointerType *RHSOPT, 4158 llvm::SmallVectorImpl<ObjCProtocolDecl *> &IntersectionOfProtocols) { 4159 4160 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4161 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4162 4163 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> InheritedProtocolSet; 4164 unsigned LHSNumProtocols = LHS->getNumProtocols(); 4165 if (LHSNumProtocols > 0) 4166 InheritedProtocolSet.insert(LHS->qual_begin(), LHS->qual_end()); 4167 else { 4168 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> LHSInheritedProtocols; 4169 Context.CollectInheritedProtocols(LHS->getDecl(), LHSInheritedProtocols); 4170 InheritedProtocolSet.insert(LHSInheritedProtocols.begin(), 4171 LHSInheritedProtocols.end()); 4172 } 4173 4174 unsigned RHSNumProtocols = RHS->getNumProtocols(); 4175 if (RHSNumProtocols > 0) { 4176 ObjCProtocolDecl **RHSProtocols = (ObjCProtocolDecl **)RHS->qual_begin(); 4177 for (unsigned i = 0; i < RHSNumProtocols; ++i) 4178 if (InheritedProtocolSet.count(RHSProtocols[i])) 4179 IntersectionOfProtocols.push_back(RHSProtocols[i]); 4180 } 4181 else { 4182 llvm::SmallPtrSet<ObjCProtocolDecl *, 8> RHSInheritedProtocols; 4183 Context.CollectInheritedProtocols(RHS->getDecl(), RHSInheritedProtocols); 4184 for (llvm::SmallPtrSet<ObjCProtocolDecl*,8>::iterator I = 4185 RHSInheritedProtocols.begin(), 4186 E = RHSInheritedProtocols.end(); I != E; ++I) 4187 if (InheritedProtocolSet.count((*I))) 4188 IntersectionOfProtocols.push_back((*I)); 4189 } 4190} 4191 4192/// areCommonBaseCompatible - Returns common base class of the two classes if 4193/// one found. Note that this is O'2 algorithm. But it will be called as the 4194/// last type comparison in a ?-exp of ObjC pointer types before a 4195/// warning is issued. So, its invokation is extremely rare. 4196QualType ASTContext::areCommonBaseCompatible( 4197 const ObjCObjectPointerType *LHSOPT, 4198 const ObjCObjectPointerType *RHSOPT) { 4199 const ObjCInterfaceType* LHS = LHSOPT->getInterfaceType(); 4200 const ObjCInterfaceType* RHS = RHSOPT->getInterfaceType(); 4201 if (!LHS || !RHS) 4202 return QualType(); 4203 4204 while (const ObjCInterfaceDecl *LHSIDecl = LHS->getDecl()->getSuperClass()) { 4205 QualType LHSTy = getObjCInterfaceType(LHSIDecl); 4206 LHS = LHSTy->getAs<ObjCInterfaceType>(); 4207 if (canAssignObjCInterfaces(LHS, RHS)) { 4208 llvm::SmallVector<ObjCProtocolDecl *, 8> IntersectionOfProtocols; 4209 getIntersectionOfProtocols(*this, 4210 LHSOPT, RHSOPT, IntersectionOfProtocols); 4211 if (IntersectionOfProtocols.empty()) 4212 LHSTy = getObjCObjectPointerType(LHSTy); 4213 else 4214 LHSTy = getObjCObjectPointerType(LHSTy, &IntersectionOfProtocols[0], 4215 IntersectionOfProtocols.size()); 4216 return LHSTy; 4217 } 4218 } 4219 4220 return QualType(); 4221} 4222 4223bool ASTContext::canAssignObjCInterfaces(const ObjCInterfaceType *LHS, 4224 const ObjCInterfaceType *RHS) { 4225 // Verify that the base decls are compatible: the RHS must be a subclass of 4226 // the LHS. 4227 if (!LHS->getDecl()->isSuperClassOf(RHS->getDecl())) 4228 return false; 4229 4230 // RHS must have a superset of the protocols in the LHS. If the LHS is not 4231 // protocol qualified at all, then we are good. 4232 if (LHS->getNumProtocols() == 0) 4233 return true; 4234 4235 // Okay, we know the LHS has protocol qualifiers. If the RHS doesn't, then it 4236 // isn't a superset. 4237 if (RHS->getNumProtocols() == 0) 4238 return true; // FIXME: should return false! 4239 4240 for (ObjCInterfaceType::qual_iterator LHSPI = LHS->qual_begin(), 4241 LHSPE = LHS->qual_end(); 4242 LHSPI != LHSPE; LHSPI++) { 4243 bool RHSImplementsProtocol = false; 4244 4245 // If the RHS doesn't implement the protocol on the left, the types 4246 // are incompatible. 4247 for (ObjCInterfaceType::qual_iterator RHSPI = RHS->qual_begin(), 4248 RHSPE = RHS->qual_end(); 4249 RHSPI != RHSPE; RHSPI++) { 4250 if ((*RHSPI)->lookupProtocolNamed((*LHSPI)->getIdentifier())) { 4251 RHSImplementsProtocol = true; 4252 break; 4253 } 4254 } 4255 // FIXME: For better diagnostics, consider passing back the protocol name. 4256 if (!RHSImplementsProtocol) 4257 return false; 4258 } 4259 // The RHS implements all protocols listed on the LHS. 4260 return true; 4261} 4262 4263bool ASTContext::areComparableObjCPointerTypes(QualType LHS, QualType RHS) { 4264 // get the "pointed to" types 4265 const ObjCObjectPointerType *LHSOPT = LHS->getAs<ObjCObjectPointerType>(); 4266 const ObjCObjectPointerType *RHSOPT = RHS->getAs<ObjCObjectPointerType>(); 4267 4268 if (!LHSOPT || !RHSOPT) 4269 return false; 4270 4271 return canAssignObjCInterfaces(LHSOPT, RHSOPT) || 4272 canAssignObjCInterfaces(RHSOPT, LHSOPT); 4273} 4274 4275/// typesAreCompatible - C99 6.7.3p9: For two qualified types to be compatible, 4276/// both shall have the identically qualified version of a compatible type. 4277/// C99 6.2.7p1: Two types have compatible types if their types are the 4278/// same. See 6.7.[2,3,5] for additional rules. 4279bool ASTContext::typesAreCompatible(QualType LHS, QualType RHS) { 4280 if (getLangOptions().CPlusPlus) 4281 return hasSameType(LHS, RHS); 4282 4283 return !mergeTypes(LHS, RHS).isNull(); 4284} 4285 4286bool ASTContext::typesAreBlockPointerCompatible(QualType LHS, QualType RHS) { 4287 return !mergeTypes(LHS, RHS, true).isNull(); 4288} 4289 4290QualType ASTContext::mergeFunctionTypes(QualType lhs, QualType rhs, 4291 bool OfBlockPointer) { 4292 const FunctionType *lbase = lhs->getAs<FunctionType>(); 4293 const FunctionType *rbase = rhs->getAs<FunctionType>(); 4294 const FunctionProtoType *lproto = dyn_cast<FunctionProtoType>(lbase); 4295 const FunctionProtoType *rproto = dyn_cast<FunctionProtoType>(rbase); 4296 bool allLTypes = true; 4297 bool allRTypes = true; 4298 4299 // Check return type 4300 QualType retType; 4301 if (OfBlockPointer) 4302 retType = mergeTypes(rbase->getResultType(), lbase->getResultType(), true); 4303 else 4304 retType = mergeTypes(lbase->getResultType(), rbase->getResultType()); 4305 if (retType.isNull()) return QualType(); 4306 if (getCanonicalType(retType) != getCanonicalType(lbase->getResultType())) 4307 allLTypes = false; 4308 if (getCanonicalType(retType) != getCanonicalType(rbase->getResultType())) 4309 allRTypes = false; 4310 // FIXME: double check this 4311 FunctionType::ExtInfo lbaseInfo = lbase->getExtInfo(); 4312 FunctionType::ExtInfo rbaseInfo = rbase->getExtInfo(); 4313 bool NoReturn = lbaseInfo.getNoReturn() || rbaseInfo.getNoReturn(); 4314 if (NoReturn != lbaseInfo.getNoReturn()) 4315 allLTypes = false; 4316 if (NoReturn != rbaseInfo.getNoReturn()) 4317 allRTypes = false; 4318 CallingConv lcc = lbaseInfo.getCC(); 4319 CallingConv rcc = rbaseInfo.getCC(); 4320 // Compatible functions must have compatible calling conventions 4321 if (!isSameCallConv(lcc, rcc)) 4322 return QualType(); 4323 4324 if (lproto && rproto) { // two C99 style function prototypes 4325 assert(!lproto->hasExceptionSpec() && !rproto->hasExceptionSpec() && 4326 "C++ shouldn't be here"); 4327 unsigned lproto_nargs = lproto->getNumArgs(); 4328 unsigned rproto_nargs = rproto->getNumArgs(); 4329 4330 // Compatible functions must have the same number of arguments 4331 if (lproto_nargs != rproto_nargs) 4332 return QualType(); 4333 4334 // Variadic and non-variadic functions aren't compatible 4335 if (lproto->isVariadic() != rproto->isVariadic()) 4336 return QualType(); 4337 4338 if (lproto->getTypeQuals() != rproto->getTypeQuals()) 4339 return QualType(); 4340 4341 // Check argument compatibility 4342 llvm::SmallVector<QualType, 10> types; 4343 for (unsigned i = 0; i < lproto_nargs; i++) { 4344 QualType largtype = lproto->getArgType(i).getUnqualifiedType(); 4345 QualType rargtype = rproto->getArgType(i).getUnqualifiedType(); 4346 QualType argtype = mergeTypes(largtype, rargtype, OfBlockPointer); 4347 if (argtype.isNull()) return QualType(); 4348 types.push_back(argtype); 4349 if (getCanonicalType(argtype) != getCanonicalType(largtype)) 4350 allLTypes = false; 4351 if (getCanonicalType(argtype) != getCanonicalType(rargtype)) 4352 allRTypes = false; 4353 } 4354 if (allLTypes) return lhs; 4355 if (allRTypes) return rhs; 4356 return getFunctionType(retType, types.begin(), types.size(), 4357 lproto->isVariadic(), lproto->getTypeQuals(), 4358 false, false, 0, 0, 4359 FunctionType::ExtInfo(NoReturn, lcc)); 4360 } 4361 4362 if (lproto) allRTypes = false; 4363 if (rproto) allLTypes = false; 4364 4365 const FunctionProtoType *proto = lproto ? lproto : rproto; 4366 if (proto) { 4367 assert(!proto->hasExceptionSpec() && "C++ shouldn't be here"); 4368 if (proto->isVariadic()) return QualType(); 4369 // Check that the types are compatible with the types that 4370 // would result from default argument promotions (C99 6.7.5.3p15). 4371 // The only types actually affected are promotable integer 4372 // types and floats, which would be passed as a different 4373 // type depending on whether the prototype is visible. 4374 unsigned proto_nargs = proto->getNumArgs(); 4375 for (unsigned i = 0; i < proto_nargs; ++i) { 4376 QualType argTy = proto->getArgType(i); 4377 4378 // Look at the promotion type of enum types, since that is the type used 4379 // to pass enum values. 4380 if (const EnumType *Enum = argTy->getAs<EnumType>()) 4381 argTy = Enum->getDecl()->getPromotionType(); 4382 4383 if (argTy->isPromotableIntegerType() || 4384 getCanonicalType(argTy).getUnqualifiedType() == FloatTy) 4385 return QualType(); 4386 } 4387 4388 if (allLTypes) return lhs; 4389 if (allRTypes) return rhs; 4390 return getFunctionType(retType, proto->arg_type_begin(), 4391 proto->getNumArgs(), proto->isVariadic(), 4392 proto->getTypeQuals(), 4393 false, false, 0, 0, 4394 FunctionType::ExtInfo(NoReturn, lcc)); 4395 } 4396 4397 if (allLTypes) return lhs; 4398 if (allRTypes) return rhs; 4399 FunctionType::ExtInfo Info(NoReturn, lcc); 4400 return getFunctionNoProtoType(retType, Info); 4401} 4402 4403QualType ASTContext::mergeTypes(QualType LHS, QualType RHS, 4404 bool OfBlockPointer) { 4405 // C++ [expr]: If an expression initially has the type "reference to T", the 4406 // type is adjusted to "T" prior to any further analysis, the expression 4407 // designates the object or function denoted by the reference, and the 4408 // expression is an lvalue unless the reference is an rvalue reference and 4409 // the expression is a function call (possibly inside parentheses). 4410 assert(!LHS->getAs<ReferenceType>() && "LHS is a reference type?"); 4411 assert(!RHS->getAs<ReferenceType>() && "RHS is a reference type?"); 4412 4413 QualType LHSCan = getCanonicalType(LHS), 4414 RHSCan = getCanonicalType(RHS); 4415 4416 // If two types are identical, they are compatible. 4417 if (LHSCan == RHSCan) 4418 return LHS; 4419 4420 // If the qualifiers are different, the types aren't compatible... mostly. 4421 Qualifiers LQuals = LHSCan.getLocalQualifiers(); 4422 Qualifiers RQuals = RHSCan.getLocalQualifiers(); 4423 if (LQuals != RQuals) { 4424 // If any of these qualifiers are different, we have a type 4425 // mismatch. 4426 if (LQuals.getCVRQualifiers() != RQuals.getCVRQualifiers() || 4427 LQuals.getAddressSpace() != RQuals.getAddressSpace()) 4428 return QualType(); 4429 4430 // Exactly one GC qualifier difference is allowed: __strong is 4431 // okay if the other type has no GC qualifier but is an Objective 4432 // C object pointer (i.e. implicitly strong by default). We fix 4433 // this by pretending that the unqualified type was actually 4434 // qualified __strong. 4435 Qualifiers::GC GC_L = LQuals.getObjCGCAttr(); 4436 Qualifiers::GC GC_R = RQuals.getObjCGCAttr(); 4437 assert((GC_L != GC_R) && "unequal qualifier sets had only equal elements"); 4438 4439 if (GC_L == Qualifiers::Weak || GC_R == Qualifiers::Weak) 4440 return QualType(); 4441 4442 if (GC_L == Qualifiers::Strong && RHSCan->isObjCObjectPointerType()) { 4443 return mergeTypes(LHS, getObjCGCQualType(RHS, Qualifiers::Strong)); 4444 } 4445 if (GC_R == Qualifiers::Strong && LHSCan->isObjCObjectPointerType()) { 4446 return mergeTypes(getObjCGCQualType(LHS, Qualifiers::Strong), RHS); 4447 } 4448 return QualType(); 4449 } 4450 4451 // Okay, qualifiers are equal. 4452 4453 Type::TypeClass LHSClass = LHSCan->getTypeClass(); 4454 Type::TypeClass RHSClass = RHSCan->getTypeClass(); 4455 4456 // We want to consider the two function types to be the same for these 4457 // comparisons, just force one to the other. 4458 if (LHSClass == Type::FunctionProto) LHSClass = Type::FunctionNoProto; 4459 if (RHSClass == Type::FunctionProto) RHSClass = Type::FunctionNoProto; 4460 4461 // Same as above for arrays 4462 if (LHSClass == Type::VariableArray || LHSClass == Type::IncompleteArray) 4463 LHSClass = Type::ConstantArray; 4464 if (RHSClass == Type::VariableArray || RHSClass == Type::IncompleteArray) 4465 RHSClass = Type::ConstantArray; 4466 4467 // Canonicalize ExtVector -> Vector. 4468 if (LHSClass == Type::ExtVector) LHSClass = Type::Vector; 4469 if (RHSClass == Type::ExtVector) RHSClass = Type::Vector; 4470 4471 // If the canonical type classes don't match. 4472 if (LHSClass != RHSClass) { 4473 // C99 6.7.2.2p4: Each enumerated type shall be compatible with char, 4474 // a signed integer type, or an unsigned integer type. 4475 // Compatibility is based on the underlying type, not the promotion 4476 // type. 4477 if (const EnumType* ETy = LHS->getAs<EnumType>()) { 4478 if (ETy->getDecl()->getIntegerType() == RHSCan.getUnqualifiedType()) 4479 return RHS; 4480 } 4481 if (const EnumType* ETy = RHS->getAs<EnumType>()) { 4482 if (ETy->getDecl()->getIntegerType() == LHSCan.getUnqualifiedType()) 4483 return LHS; 4484 } 4485 4486 return QualType(); 4487 } 4488 4489 // The canonical type classes match. 4490 switch (LHSClass) { 4491#define TYPE(Class, Base) 4492#define ABSTRACT_TYPE(Class, Base) 4493#define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) case Type::Class: 4494#define NON_CANONICAL_TYPE(Class, Base) case Type::Class: 4495#define DEPENDENT_TYPE(Class, Base) case Type::Class: 4496#include "clang/AST/TypeNodes.def" 4497 assert(false && "Non-canonical and dependent types shouldn't get here"); 4498 return QualType(); 4499 4500 case Type::LValueReference: 4501 case Type::RValueReference: 4502 case Type::MemberPointer: 4503 assert(false && "C++ should never be in mergeTypes"); 4504 return QualType(); 4505 4506 case Type::IncompleteArray: 4507 case Type::VariableArray: 4508 case Type::FunctionProto: 4509 case Type::ExtVector: 4510 assert(false && "Types are eliminated above"); 4511 return QualType(); 4512 4513 case Type::Pointer: 4514 { 4515 // Merge two pointer types, while trying to preserve typedef info 4516 QualType LHSPointee = LHS->getAs<PointerType>()->getPointeeType(); 4517 QualType RHSPointee = RHS->getAs<PointerType>()->getPointeeType(); 4518 QualType ResultType = mergeTypes(LHSPointee, RHSPointee); 4519 if (ResultType.isNull()) return QualType(); 4520 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 4521 return LHS; 4522 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 4523 return RHS; 4524 return getPointerType(ResultType); 4525 } 4526 case Type::BlockPointer: 4527 { 4528 // Merge two block pointer types, while trying to preserve typedef info 4529 QualType LHSPointee = LHS->getAs<BlockPointerType>()->getPointeeType(); 4530 QualType RHSPointee = RHS->getAs<BlockPointerType>()->getPointeeType(); 4531 QualType ResultType = mergeTypes(LHSPointee, RHSPointee, OfBlockPointer); 4532 if (ResultType.isNull()) return QualType(); 4533 if (getCanonicalType(LHSPointee) == getCanonicalType(ResultType)) 4534 return LHS; 4535 if (getCanonicalType(RHSPointee) == getCanonicalType(ResultType)) 4536 return RHS; 4537 return getBlockPointerType(ResultType); 4538 } 4539 case Type::ConstantArray: 4540 { 4541 const ConstantArrayType* LCAT = getAsConstantArrayType(LHS); 4542 const ConstantArrayType* RCAT = getAsConstantArrayType(RHS); 4543 if (LCAT && RCAT && RCAT->getSize() != LCAT->getSize()) 4544 return QualType(); 4545 4546 QualType LHSElem = getAsArrayType(LHS)->getElementType(); 4547 QualType RHSElem = getAsArrayType(RHS)->getElementType(); 4548 QualType ResultType = mergeTypes(LHSElem, RHSElem); 4549 if (ResultType.isNull()) return QualType(); 4550 if (LCAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 4551 return LHS; 4552 if (RCAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 4553 return RHS; 4554 if (LCAT) return getConstantArrayType(ResultType, LCAT->getSize(), 4555 ArrayType::ArraySizeModifier(), 0); 4556 if (RCAT) return getConstantArrayType(ResultType, RCAT->getSize(), 4557 ArrayType::ArraySizeModifier(), 0); 4558 const VariableArrayType* LVAT = getAsVariableArrayType(LHS); 4559 const VariableArrayType* RVAT = getAsVariableArrayType(RHS); 4560 if (LVAT && getCanonicalType(LHSElem) == getCanonicalType(ResultType)) 4561 return LHS; 4562 if (RVAT && getCanonicalType(RHSElem) == getCanonicalType(ResultType)) 4563 return RHS; 4564 if (LVAT) { 4565 // FIXME: This isn't correct! But tricky to implement because 4566 // the array's size has to be the size of LHS, but the type 4567 // has to be different. 4568 return LHS; 4569 } 4570 if (RVAT) { 4571 // FIXME: This isn't correct! But tricky to implement because 4572 // the array's size has to be the size of RHS, but the type 4573 // has to be different. 4574 return RHS; 4575 } 4576 if (getCanonicalType(LHSElem) == getCanonicalType(ResultType)) return LHS; 4577 if (getCanonicalType(RHSElem) == getCanonicalType(ResultType)) return RHS; 4578 return getIncompleteArrayType(ResultType, 4579 ArrayType::ArraySizeModifier(), 0); 4580 } 4581 case Type::FunctionNoProto: 4582 return mergeFunctionTypes(LHS, RHS, OfBlockPointer); 4583 case Type::Record: 4584 case Type::Enum: 4585 return QualType(); 4586 case Type::Builtin: 4587 // Only exactly equal builtin types are compatible, which is tested above. 4588 return QualType(); 4589 case Type::Complex: 4590 // Distinct complex types are incompatible. 4591 return QualType(); 4592 case Type::Vector: 4593 // FIXME: The merged type should be an ExtVector! 4594 if (areCompatVectorTypes(LHSCan->getAs<VectorType>(), 4595 RHSCan->getAs<VectorType>())) 4596 return LHS; 4597 return QualType(); 4598 case Type::ObjCInterface: { 4599 // Check if the interfaces are assignment compatible. 4600 // FIXME: This should be type compatibility, e.g. whether 4601 // "LHS x; RHS x;" at global scope is legal. 4602 const ObjCInterfaceType* LHSIface = LHS->getAs<ObjCInterfaceType>(); 4603 const ObjCInterfaceType* RHSIface = RHS->getAs<ObjCInterfaceType>(); 4604 if (LHSIface && RHSIface && 4605 canAssignObjCInterfaces(LHSIface, RHSIface)) 4606 return LHS; 4607 4608 return QualType(); 4609 } 4610 case Type::ObjCObjectPointer: { 4611 if (OfBlockPointer) { 4612 if (canAssignObjCInterfacesInBlockPointer( 4613 LHS->getAs<ObjCObjectPointerType>(), 4614 RHS->getAs<ObjCObjectPointerType>())) 4615 return LHS; 4616 return QualType(); 4617 } 4618 if (canAssignObjCInterfaces(LHS->getAs<ObjCObjectPointerType>(), 4619 RHS->getAs<ObjCObjectPointerType>())) 4620 return LHS; 4621 4622 return QualType(); 4623 } 4624 } 4625 4626 return QualType(); 4627} 4628 4629//===----------------------------------------------------------------------===// 4630// Integer Predicates 4631//===----------------------------------------------------------------------===// 4632 4633unsigned ASTContext::getIntWidth(QualType T) { 4634 if (T->isBooleanType()) 4635 return 1; 4636 if (EnumType *ET = dyn_cast<EnumType>(T)) 4637 T = ET->getDecl()->getIntegerType(); 4638 // For builtin types, just use the standard type sizing method 4639 return (unsigned)getTypeSize(T); 4640} 4641 4642QualType ASTContext::getCorrespondingUnsignedType(QualType T) { 4643 assert(T->isSignedIntegerType() && "Unexpected type"); 4644 4645 // Turn <4 x signed int> -> <4 x unsigned int> 4646 if (const VectorType *VTy = T->getAs<VectorType>()) 4647 return getVectorType(getCorrespondingUnsignedType(VTy->getElementType()), 4648 VTy->getNumElements(), VTy->isAltiVec(), VTy->isPixel()); 4649 4650 // For enums, we return the unsigned version of the base type. 4651 if (const EnumType *ETy = T->getAs<EnumType>()) 4652 T = ETy->getDecl()->getIntegerType(); 4653 4654 const BuiltinType *BTy = T->getAs<BuiltinType>(); 4655 assert(BTy && "Unexpected signed integer type"); 4656 switch (BTy->getKind()) { 4657 case BuiltinType::Char_S: 4658 case BuiltinType::SChar: 4659 return UnsignedCharTy; 4660 case BuiltinType::Short: 4661 return UnsignedShortTy; 4662 case BuiltinType::Int: 4663 return UnsignedIntTy; 4664 case BuiltinType::Long: 4665 return UnsignedLongTy; 4666 case BuiltinType::LongLong: 4667 return UnsignedLongLongTy; 4668 case BuiltinType::Int128: 4669 return UnsignedInt128Ty; 4670 default: 4671 assert(0 && "Unexpected signed integer type"); 4672 return QualType(); 4673 } 4674} 4675 4676ExternalASTSource::~ExternalASTSource() { } 4677 4678void ExternalASTSource::PrintStats() { } 4679 4680 4681//===----------------------------------------------------------------------===// 4682// Builtin Type Computation 4683//===----------------------------------------------------------------------===// 4684 4685/// DecodeTypeFromStr - This decodes one type descriptor from Str, advancing the 4686/// pointer over the consumed characters. This returns the resultant type. 4687static QualType DecodeTypeFromStr(const char *&Str, ASTContext &Context, 4688 ASTContext::GetBuiltinTypeError &Error, 4689 bool AllowTypeModifiers = true) { 4690 // Modifiers. 4691 int HowLong = 0; 4692 bool Signed = false, Unsigned = false; 4693 4694 // Read the modifiers first. 4695 bool Done = false; 4696 while (!Done) { 4697 switch (*Str++) { 4698 default: Done = true; --Str; break; 4699 case 'S': 4700 assert(!Unsigned && "Can't use both 'S' and 'U' modifiers!"); 4701 assert(!Signed && "Can't use 'S' modifier multiple times!"); 4702 Signed = true; 4703 break; 4704 case 'U': 4705 assert(!Signed && "Can't use both 'S' and 'U' modifiers!"); 4706 assert(!Unsigned && "Can't use 'S' modifier multiple times!"); 4707 Unsigned = true; 4708 break; 4709 case 'L': 4710 assert(HowLong <= 2 && "Can't have LLLL modifier"); 4711 ++HowLong; 4712 break; 4713 } 4714 } 4715 4716 QualType Type; 4717 4718 // Read the base type. 4719 switch (*Str++) { 4720 default: assert(0 && "Unknown builtin type letter!"); 4721 case 'v': 4722 assert(HowLong == 0 && !Signed && !Unsigned && 4723 "Bad modifiers used with 'v'!"); 4724 Type = Context.VoidTy; 4725 break; 4726 case 'f': 4727 assert(HowLong == 0 && !Signed && !Unsigned && 4728 "Bad modifiers used with 'f'!"); 4729 Type = Context.FloatTy; 4730 break; 4731 case 'd': 4732 assert(HowLong < 2 && !Signed && !Unsigned && 4733 "Bad modifiers used with 'd'!"); 4734 if (HowLong) 4735 Type = Context.LongDoubleTy; 4736 else 4737 Type = Context.DoubleTy; 4738 break; 4739 case 's': 4740 assert(HowLong == 0 && "Bad modifiers used with 's'!"); 4741 if (Unsigned) 4742 Type = Context.UnsignedShortTy; 4743 else 4744 Type = Context.ShortTy; 4745 break; 4746 case 'i': 4747 if (HowLong == 3) 4748 Type = Unsigned ? Context.UnsignedInt128Ty : Context.Int128Ty; 4749 else if (HowLong == 2) 4750 Type = Unsigned ? Context.UnsignedLongLongTy : Context.LongLongTy; 4751 else if (HowLong == 1) 4752 Type = Unsigned ? Context.UnsignedLongTy : Context.LongTy; 4753 else 4754 Type = Unsigned ? Context.UnsignedIntTy : Context.IntTy; 4755 break; 4756 case 'c': 4757 assert(HowLong == 0 && "Bad modifiers used with 'c'!"); 4758 if (Signed) 4759 Type = Context.SignedCharTy; 4760 else if (Unsigned) 4761 Type = Context.UnsignedCharTy; 4762 else 4763 Type = Context.CharTy; 4764 break; 4765 case 'b': // boolean 4766 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'b'!"); 4767 Type = Context.BoolTy; 4768 break; 4769 case 'z': // size_t. 4770 assert(HowLong == 0 && !Signed && !Unsigned && "Bad modifiers for 'z'!"); 4771 Type = Context.getSizeType(); 4772 break; 4773 case 'F': 4774 Type = Context.getCFConstantStringType(); 4775 break; 4776 case 'a': 4777 Type = Context.getBuiltinVaListType(); 4778 assert(!Type.isNull() && "builtin va list type not initialized!"); 4779 break; 4780 case 'A': 4781 // This is a "reference" to a va_list; however, what exactly 4782 // this means depends on how va_list is defined. There are two 4783 // different kinds of va_list: ones passed by value, and ones 4784 // passed by reference. An example of a by-value va_list is 4785 // x86, where va_list is a char*. An example of by-ref va_list 4786 // is x86-64, where va_list is a __va_list_tag[1]. For x86, 4787 // we want this argument to be a char*&; for x86-64, we want 4788 // it to be a __va_list_tag*. 4789 Type = Context.getBuiltinVaListType(); 4790 assert(!Type.isNull() && "builtin va list type not initialized!"); 4791 if (Type->isArrayType()) { 4792 Type = Context.getArrayDecayedType(Type); 4793 } else { 4794 Type = Context.getLValueReferenceType(Type); 4795 } 4796 break; 4797 case 'V': { 4798 char *End; 4799 unsigned NumElements = strtoul(Str, &End, 10); 4800 assert(End != Str && "Missing vector size"); 4801 4802 Str = End; 4803 4804 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 4805 // FIXME: Don't know what to do about AltiVec. 4806 Type = Context.getVectorType(ElementType, NumElements, false, false); 4807 break; 4808 } 4809 case 'X': { 4810 QualType ElementType = DecodeTypeFromStr(Str, Context, Error, false); 4811 Type = Context.getComplexType(ElementType); 4812 break; 4813 } 4814 case 'P': 4815 Type = Context.getFILEType(); 4816 if (Type.isNull()) { 4817 Error = ASTContext::GE_Missing_stdio; 4818 return QualType(); 4819 } 4820 break; 4821 case 'J': 4822 if (Signed) 4823 Type = Context.getsigjmp_bufType(); 4824 else 4825 Type = Context.getjmp_bufType(); 4826 4827 if (Type.isNull()) { 4828 Error = ASTContext::GE_Missing_setjmp; 4829 return QualType(); 4830 } 4831 break; 4832 } 4833 4834 if (!AllowTypeModifiers) 4835 return Type; 4836 4837 Done = false; 4838 while (!Done) { 4839 switch (char c = *Str++) { 4840 default: Done = true; --Str; break; 4841 case '*': 4842 case '&': 4843 { 4844 // Both pointers and references can have their pointee types 4845 // qualified with an address space. 4846 char *End; 4847 unsigned AddrSpace = strtoul(Str, &End, 10); 4848 if (End != Str && AddrSpace != 0) { 4849 Type = Context.getAddrSpaceQualType(Type, AddrSpace); 4850 Str = End; 4851 } 4852 } 4853 if (c == '*') 4854 Type = Context.getPointerType(Type); 4855 else 4856 Type = Context.getLValueReferenceType(Type); 4857 break; 4858 // FIXME: There's no way to have a built-in with an rvalue ref arg. 4859 case 'C': 4860 Type = Type.withConst(); 4861 break; 4862 case 'D': 4863 Type = Context.getVolatileType(Type); 4864 break; 4865 } 4866 } 4867 4868 return Type; 4869} 4870 4871/// GetBuiltinType - Return the type for the specified builtin. 4872QualType ASTContext::GetBuiltinType(unsigned id, 4873 GetBuiltinTypeError &Error) { 4874 const char *TypeStr = BuiltinInfo.GetTypeString(id); 4875 4876 llvm::SmallVector<QualType, 8> ArgTypes; 4877 4878 Error = GE_None; 4879 QualType ResType = DecodeTypeFromStr(TypeStr, *this, Error); 4880 if (Error != GE_None) 4881 return QualType(); 4882 while (TypeStr[0] && TypeStr[0] != '.') { 4883 QualType Ty = DecodeTypeFromStr(TypeStr, *this, Error); 4884 if (Error != GE_None) 4885 return QualType(); 4886 4887 // Do array -> pointer decay. The builtin should use the decayed type. 4888 if (Ty->isArrayType()) 4889 Ty = getArrayDecayedType(Ty); 4890 4891 ArgTypes.push_back(Ty); 4892 } 4893 4894 assert((TypeStr[0] != '.' || TypeStr[1] == 0) && 4895 "'.' should only occur at end of builtin type list!"); 4896 4897 // handle untyped/variadic arguments "T c99Style();" or "T cppStyle(...);". 4898 if (ArgTypes.size() == 0 && TypeStr[0] == '.') 4899 return getFunctionNoProtoType(ResType); 4900 4901 // FIXME: Should we create noreturn types? 4902 return getFunctionType(ResType, ArgTypes.data(), ArgTypes.size(), 4903 TypeStr[0] == '.', 0, false, false, 0, 0, 4904 FunctionType::ExtInfo()); 4905} 4906 4907QualType 4908ASTContext::UsualArithmeticConversionsType(QualType lhs, QualType rhs) { 4909 // Perform the usual unary conversions. We do this early so that 4910 // integral promotions to "int" can allow us to exit early, in the 4911 // lhs == rhs check. Also, for conversion purposes, we ignore any 4912 // qualifiers. For example, "const float" and "float" are 4913 // equivalent. 4914 if (lhs->isPromotableIntegerType()) 4915 lhs = getPromotedIntegerType(lhs); 4916 else 4917 lhs = lhs.getUnqualifiedType(); 4918 if (rhs->isPromotableIntegerType()) 4919 rhs = getPromotedIntegerType(rhs); 4920 else 4921 rhs = rhs.getUnqualifiedType(); 4922 4923 // If both types are identical, no conversion is needed. 4924 if (lhs == rhs) 4925 return lhs; 4926 4927 // If either side is a non-arithmetic type (e.g. a pointer), we are done. 4928 // The caller can deal with this (e.g. pointer + int). 4929 if (!lhs->isArithmeticType() || !rhs->isArithmeticType()) 4930 return lhs; 4931 4932 // At this point, we have two different arithmetic types. 4933 4934 // Handle complex types first (C99 6.3.1.8p1). 4935 if (lhs->isComplexType() || rhs->isComplexType()) { 4936 // if we have an integer operand, the result is the complex type. 4937 if (rhs->isIntegerType() || rhs->isComplexIntegerType()) { 4938 // convert the rhs to the lhs complex type. 4939 return lhs; 4940 } 4941 if (lhs->isIntegerType() || lhs->isComplexIntegerType()) { 4942 // convert the lhs to the rhs complex type. 4943 return rhs; 4944 } 4945 // This handles complex/complex, complex/float, or float/complex. 4946 // When both operands are complex, the shorter operand is converted to the 4947 // type of the longer, and that is the type of the result. This corresponds 4948 // to what is done when combining two real floating-point operands. 4949 // The fun begins when size promotion occur across type domains. 4950 // From H&S 6.3.4: When one operand is complex and the other is a real 4951 // floating-point type, the less precise type is converted, within it's 4952 // real or complex domain, to the precision of the other type. For example, 4953 // when combining a "long double" with a "double _Complex", the 4954 // "double _Complex" is promoted to "long double _Complex". 4955 int result = getFloatingTypeOrder(lhs, rhs); 4956 4957 if (result > 0) { // The left side is bigger, convert rhs. 4958 rhs = getFloatingTypeOfSizeWithinDomain(lhs, rhs); 4959 } else if (result < 0) { // The right side is bigger, convert lhs. 4960 lhs = getFloatingTypeOfSizeWithinDomain(rhs, lhs); 4961 } 4962 // At this point, lhs and rhs have the same rank/size. Now, make sure the 4963 // domains match. This is a requirement for our implementation, C99 4964 // does not require this promotion. 4965 if (lhs != rhs) { // Domains don't match, we have complex/float mix. 4966 if (lhs->isRealFloatingType()) { // handle "double, _Complex double". 4967 return rhs; 4968 } else { // handle "_Complex double, double". 4969 return lhs; 4970 } 4971 } 4972 return lhs; // The domain/size match exactly. 4973 } 4974 // Now handle "real" floating types (i.e. float, double, long double). 4975 if (lhs->isRealFloatingType() || rhs->isRealFloatingType()) { 4976 // if we have an integer operand, the result is the real floating type. 4977 if (rhs->isIntegerType()) { 4978 // convert rhs to the lhs floating point type. 4979 return lhs; 4980 } 4981 if (rhs->isComplexIntegerType()) { 4982 // convert rhs to the complex floating point type. 4983 return getComplexType(lhs); 4984 } 4985 if (lhs->isIntegerType()) { 4986 // convert lhs to the rhs floating point type. 4987 return rhs; 4988 } 4989 if (lhs->isComplexIntegerType()) { 4990 // convert lhs to the complex floating point type. 4991 return getComplexType(rhs); 4992 } 4993 // We have two real floating types, float/complex combos were handled above. 4994 // Convert the smaller operand to the bigger result. 4995 int result = getFloatingTypeOrder(lhs, rhs); 4996 if (result > 0) // convert the rhs 4997 return lhs; 4998 assert(result < 0 && "illegal float comparison"); 4999 return rhs; // convert the lhs 5000 } 5001 if (lhs->isComplexIntegerType() || rhs->isComplexIntegerType()) { 5002 // Handle GCC complex int extension. 5003 const ComplexType *lhsComplexInt = lhs->getAsComplexIntegerType(); 5004 const ComplexType *rhsComplexInt = rhs->getAsComplexIntegerType(); 5005 5006 if (lhsComplexInt && rhsComplexInt) { 5007 if (getIntegerTypeOrder(lhsComplexInt->getElementType(), 5008 rhsComplexInt->getElementType()) >= 0) 5009 return lhs; // convert the rhs 5010 return rhs; 5011 } else if (lhsComplexInt && rhs->isIntegerType()) { 5012 // convert the rhs to the lhs complex type. 5013 return lhs; 5014 } else if (rhsComplexInt && lhs->isIntegerType()) { 5015 // convert the lhs to the rhs complex type. 5016 return rhs; 5017 } 5018 } 5019 // Finally, we have two differing integer types. 5020 // The rules for this case are in C99 6.3.1.8 5021 int compare = getIntegerTypeOrder(lhs, rhs); 5022 bool lhsSigned = lhs->isSignedIntegerType(), 5023 rhsSigned = rhs->isSignedIntegerType(); 5024 QualType destType; 5025 if (lhsSigned == rhsSigned) { 5026 // Same signedness; use the higher-ranked type 5027 destType = compare >= 0 ? lhs : rhs; 5028 } else if (compare != (lhsSigned ? 1 : -1)) { 5029 // The unsigned type has greater than or equal rank to the 5030 // signed type, so use the unsigned type 5031 destType = lhsSigned ? rhs : lhs; 5032 } else if (getIntWidth(lhs) != getIntWidth(rhs)) { 5033 // The two types are different widths; if we are here, that 5034 // means the signed type is larger than the unsigned type, so 5035 // use the signed type. 5036 destType = lhsSigned ? lhs : rhs; 5037 } else { 5038 // The signed type is higher-ranked than the unsigned type, 5039 // but isn't actually any bigger (like unsigned int and long 5040 // on most 32-bit systems). Use the unsigned type corresponding 5041 // to the signed type. 5042 destType = getCorrespondingUnsignedType(lhsSigned ? lhs : rhs); 5043 } 5044 return destType; 5045} 5046